1 /* Asynchronous subprocess control for GNU Emacs.
3 Copyright (C) 1985-1988, 1993-1996, 1998-1999, 2001-2016 Free Software
6 This file is part of GNU Emacs.
8 GNU Emacs is free software: you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation, either version 3 of the License, or
11 (at your option) any later version.
13 GNU Emacs is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
26 #include <sys/types.h> /* Some typedefs are used in sys/file.h. */
34 /* Only MS-DOS does not define `subprocesses'. */
37 #include <sys/socket.h>
39 #include <netinet/in.h>
40 #include <arpa/inet.h>
42 /* Are local (unix) sockets supported? */
43 #if defined (HAVE_SYS_UN_H)
44 #if !defined (AF_LOCAL) && defined (AF_UNIX)
45 #define AF_LOCAL AF_UNIX
48 #define HAVE_LOCAL_SOCKETS
53 #include <sys/ioctl.h>
54 #if defined (HAVE_NET_IF_H)
56 #endif /* HAVE_NET_IF_H */
58 #if defined (HAVE_IFADDRS_H)
59 /* Must be after net/if.h */
62 /* We only use structs from this header when we use getifaddrs. */
63 #if defined (HAVE_NET_IF_DL_H)
64 #include <net/if_dl.h>
74 # include <sys/stream.h>
75 # include <sys/stropts.h>
79 #include <arpa/nameser.h>
95 #endif /* subprocesses */
101 #include "character.h"
106 #include "termopts.h"
107 #include "keyboard.h"
108 #include "blockinput.h"
110 #include "sysselect.h"
111 #include "syssignal.h"
117 #ifdef HAVE_WINDOW_SYSTEM
119 #endif /* HAVE_WINDOW_SYSTEM */
122 #include "xgselect.h"
129 extern int sys_select (int, fd_set
*, fd_set
*, fd_set
*,
130 struct timespec
*, void *);
133 /* Work around GCC 4.7.0 bug with strict overflow checking; see
134 <http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52904>.
135 This bug appears to be fixed in GCC 5.1, so don't work around it there. */
136 #if __GNUC__ == 4 && __GNUC_MINOR__ >= 3
137 # pragma GCC diagnostic ignored "-Wstrict-overflow"
140 /* True if keyboard input is on hold, zero otherwise. */
142 static bool kbd_is_on_hold
;
144 /* Nonzero means don't run process sentinels. This is used
146 bool inhibit_sentinels
;
151 # define SOCK_CLOEXEC 0
156 /* Emulate GNU/Linux accept4 and socket well enough for this module. */
159 close_on_exec (int fd
)
162 fcntl (fd
, F_SETFD
, FD_CLOEXEC
);
167 # define accept4(sockfd, addr, addrlen, flags) \
168 process_accept4 (sockfd, addr, addrlen, flags)
170 accept4 (int sockfd
, struct sockaddr
*addr
, socklen_t
*addrlen
, int flags
)
172 return close_on_exec (accept (sockfd
, addr
, addrlen
));
176 process_socket (int domain
, int type
, int protocol
)
178 return close_on_exec (socket (domain
, type
, protocol
));
181 # define socket(domain, type, protocol) process_socket (domain, type, protocol)
184 #define NETCONN_P(p) (EQ (XPROCESS (p)->type, Qnetwork))
185 #define NETCONN1_P(p) (EQ (p->type, Qnetwork))
186 #define SERIALCONN_P(p) (EQ (XPROCESS (p)->type, Qserial))
187 #define SERIALCONN1_P(p) (EQ (p->type, Qserial))
188 #define PIPECONN_P(p) (EQ (XPROCESS (p)->type, Qpipe))
189 #define PIPECONN1_P(p) (EQ (p->type, Qpipe))
191 /* Number of events of change of status of a process. */
192 static EMACS_INT process_tick
;
193 /* Number of events for which the user or sentinel has been notified. */
194 static EMACS_INT update_tick
;
196 /* Define NON_BLOCKING_CONNECT if we can support non-blocking connects.
197 The code can be simplified by assuming NON_BLOCKING_CONNECT once
198 Emacs starts assuming POSIX 1003.1-2001 or later. */
200 #if (defined HAVE_SELECT \
201 && (defined GNU_LINUX || defined HAVE_GETPEERNAME) \
202 && (defined EWOULDBLOCK || defined EINPROGRESS))
203 # define NON_BLOCKING_CONNECT
206 /* Define DATAGRAM_SOCKETS if datagrams can be used safely on
207 this system. We need to read full packets, so we need a
208 "non-destructive" select. So we require either native select,
209 or emulation of select using FIONREAD. */
211 #ifndef BROKEN_DATAGRAM_SOCKETS
212 # if defined HAVE_SELECT || defined USABLE_FIONREAD
213 # if defined HAVE_SENDTO && defined HAVE_RECVFROM && defined EMSGSIZE
214 # define DATAGRAM_SOCKETS
219 #if defined HAVE_LOCAL_SOCKETS && defined DATAGRAM_SOCKETS
220 # define HAVE_SEQPACKET
223 #define READ_OUTPUT_DELAY_INCREMENT (TIMESPEC_RESOLUTION / 100)
224 #define READ_OUTPUT_DELAY_MAX (READ_OUTPUT_DELAY_INCREMENT * 5)
225 #define READ_OUTPUT_DELAY_MAX_MAX (READ_OUTPUT_DELAY_INCREMENT * 7)
227 /* Number of processes which have a non-zero read_output_delay,
228 and therefore might be delayed for adaptive read buffering. */
230 static int process_output_delay_count
;
232 /* True if any process has non-nil read_output_skip. */
234 static bool process_output_skip
;
236 static void create_process (Lisp_Object
, char **, Lisp_Object
);
238 static bool keyboard_bit_set (fd_set
*);
240 static void deactivate_process (Lisp_Object
);
241 static int status_notify (struct Lisp_Process
*, struct Lisp_Process
*);
242 static int read_process_output (Lisp_Object
, int);
243 static void handle_child_signal (int);
244 static void create_pty (Lisp_Object
);
246 static Lisp_Object
get_process (register Lisp_Object name
);
247 static void exec_sentinel (Lisp_Object proc
, Lisp_Object reason
);
249 /* Mask of bits indicating the descriptors that we wait for input on. */
251 static fd_set input_wait_mask
;
253 /* Mask that excludes keyboard input descriptor(s). */
255 static fd_set non_keyboard_wait_mask
;
257 /* Mask that excludes process input descriptor(s). */
259 static fd_set non_process_wait_mask
;
261 /* Mask for selecting for write. */
263 static fd_set write_mask
;
265 #ifdef NON_BLOCKING_CONNECT
266 /* Mask of bits indicating the descriptors that we wait for connect to
267 complete on. Once they complete, they are removed from this mask
268 and added to the input_wait_mask and non_keyboard_wait_mask. */
270 static fd_set connect_wait_mask
;
272 /* Number of bits set in connect_wait_mask. */
273 static int num_pending_connects
;
274 #endif /* NON_BLOCKING_CONNECT */
276 /* The largest descriptor currently in use for a process object; -1 if none. */
277 static int max_process_desc
;
279 /* The largest descriptor currently in use for input; -1 if none. */
280 static int max_input_desc
;
282 /* Indexed by descriptor, gives the process (if any) for that descriptor. */
283 static Lisp_Object chan_process
[FD_SETSIZE
];
284 static void wait_for_socket_fds (Lisp_Object process
, char *name
);
286 /* Alist of elements (NAME . PROCESS). */
287 static Lisp_Object Vprocess_alist
;
289 /* Buffered-ahead input char from process, indexed by channel.
290 -1 means empty (no char is buffered).
291 Used on sys V where the only way to tell if there is any
292 output from the process is to read at least one char.
293 Always -1 on systems that support FIONREAD. */
295 static int proc_buffered_char
[FD_SETSIZE
];
297 /* Table of `struct coding-system' for each process. */
298 static struct coding_system
*proc_decode_coding_system
[FD_SETSIZE
];
299 static struct coding_system
*proc_encode_coding_system
[FD_SETSIZE
];
301 #ifdef DATAGRAM_SOCKETS
302 /* Table of `partner address' for datagram sockets. */
303 static struct sockaddr_and_len
{
306 } datagram_address
[FD_SETSIZE
];
307 #define DATAGRAM_CHAN_P(chan) (datagram_address[chan].sa != 0)
308 #define DATAGRAM_CONN_P(proc) \
309 (PROCESSP (proc) && \
310 XPROCESS (proc)->infd >= 0 && \
311 datagram_address[XPROCESS (proc)->infd].sa != 0)
313 #define DATAGRAM_CHAN_P(chan) (0)
314 #define DATAGRAM_CONN_P(proc) (0)
317 /* FOR_EACH_PROCESS (LIST_VAR, PROC_VAR) followed by a statement is
318 a `for' loop which iterates over processes from Vprocess_alist. */
320 #define FOR_EACH_PROCESS(list_var, proc_var) \
321 FOR_EACH_ALIST_VALUE (Vprocess_alist, list_var, proc_var)
323 /* These setters are used only in this file, so they can be private. */
325 pset_buffer (struct Lisp_Process
*p
, Lisp_Object val
)
330 pset_command (struct Lisp_Process
*p
, Lisp_Object val
)
335 pset_decode_coding_system (struct Lisp_Process
*p
, Lisp_Object val
)
337 p
->decode_coding_system
= val
;
340 pset_decoding_buf (struct Lisp_Process
*p
, Lisp_Object val
)
342 p
->decoding_buf
= val
;
345 pset_encode_coding_system (struct Lisp_Process
*p
, Lisp_Object val
)
347 p
->encode_coding_system
= val
;
350 pset_encoding_buf (struct Lisp_Process
*p
, Lisp_Object val
)
352 p
->encoding_buf
= val
;
355 pset_filter (struct Lisp_Process
*p
, Lisp_Object val
)
357 p
->filter
= NILP (val
) ? Qinternal_default_process_filter
: val
;
360 pset_log (struct Lisp_Process
*p
, Lisp_Object val
)
365 pset_mark (struct Lisp_Process
*p
, Lisp_Object val
)
370 pset_name (struct Lisp_Process
*p
, Lisp_Object val
)
375 pset_plist (struct Lisp_Process
*p
, Lisp_Object val
)
380 pset_sentinel (struct Lisp_Process
*p
, Lisp_Object val
)
382 p
->sentinel
= NILP (val
) ? Qinternal_default_process_sentinel
: val
;
385 pset_tty_name (struct Lisp_Process
*p
, Lisp_Object val
)
390 pset_type (struct Lisp_Process
*p
, Lisp_Object val
)
395 pset_write_queue (struct Lisp_Process
*p
, Lisp_Object val
)
397 p
->write_queue
= val
;
400 pset_stderrproc (struct Lisp_Process
*p
, Lisp_Object val
)
407 make_lisp_proc (struct Lisp_Process
*p
)
409 return make_lisp_ptr (p
, Lisp_Vectorlike
);
412 static struct fd_callback_data
418 int condition
; /* Mask of the defines above. */
419 } fd_callback_info
[FD_SETSIZE
];
422 /* Add a file descriptor FD to be monitored for when read is possible.
423 When read is possible, call FUNC with argument DATA. */
426 add_read_fd (int fd
, fd_callback func
, void *data
)
428 add_keyboard_wait_descriptor (fd
);
430 fd_callback_info
[fd
].func
= func
;
431 fd_callback_info
[fd
].data
= data
;
432 fd_callback_info
[fd
].condition
|= FOR_READ
;
435 /* Stop monitoring file descriptor FD for when read is possible. */
438 delete_read_fd (int fd
)
440 delete_keyboard_wait_descriptor (fd
);
442 fd_callback_info
[fd
].condition
&= ~FOR_READ
;
443 if (fd_callback_info
[fd
].condition
== 0)
445 fd_callback_info
[fd
].func
= 0;
446 fd_callback_info
[fd
].data
= 0;
450 /* Add a file descriptor FD to be monitored for when write is possible.
451 When write is possible, call FUNC with argument DATA. */
454 add_write_fd (int fd
, fd_callback func
, void *data
)
456 FD_SET (fd
, &write_mask
);
457 if (fd
> max_input_desc
)
460 fd_callback_info
[fd
].func
= func
;
461 fd_callback_info
[fd
].data
= data
;
462 fd_callback_info
[fd
].condition
|= FOR_WRITE
;
465 /* FD is no longer an input descriptor; update max_input_desc accordingly. */
468 delete_input_desc (int fd
)
470 if (fd
== max_input_desc
)
474 while (0 <= fd
&& ! (FD_ISSET (fd
, &input_wait_mask
)
475 || FD_ISSET (fd
, &write_mask
)));
481 /* Stop monitoring file descriptor FD for when write is possible. */
484 delete_write_fd (int fd
)
486 FD_CLR (fd
, &write_mask
);
487 fd_callback_info
[fd
].condition
&= ~FOR_WRITE
;
488 if (fd_callback_info
[fd
].condition
== 0)
490 fd_callback_info
[fd
].func
= 0;
491 fd_callback_info
[fd
].data
= 0;
492 delete_input_desc (fd
);
497 /* Compute the Lisp form of the process status, p->status, from
498 the numeric status that was returned by `wait'. */
500 static Lisp_Object
status_convert (int);
503 update_status (struct Lisp_Process
*p
)
505 eassert (p
->raw_status_new
);
506 pset_status (p
, status_convert (p
->raw_status
));
507 p
->raw_status_new
= 0;
510 /* Convert a process status word in Unix format to
511 the list that we use internally. */
514 status_convert (int w
)
517 return Fcons (Qstop
, Fcons (make_number (WSTOPSIG (w
)), Qnil
));
518 else if (WIFEXITED (w
))
519 return Fcons (Qexit
, Fcons (make_number (WEXITSTATUS (w
)),
520 WCOREDUMP (w
) ? Qt
: Qnil
));
521 else if (WIFSIGNALED (w
))
522 return Fcons (Qsignal
, Fcons (make_number (WTERMSIG (w
)),
523 WCOREDUMP (w
) ? Qt
: Qnil
));
528 /* Given a status-list, extract the three pieces of information
529 and store them individually through the three pointers. */
532 decode_status (Lisp_Object l
, Lisp_Object
*symbol
, int *code
, bool *coredump
)
546 *code
= XFASTINT (XCAR (tem
));
548 *coredump
= !NILP (tem
);
552 /* Return a string describing a process status list. */
555 status_message (struct Lisp_Process
*p
)
557 Lisp_Object status
= p
->status
;
563 decode_status (status
, &symbol
, &code
, &coredump
);
565 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qstop
))
568 synchronize_system_messages_locale ();
569 signame
= strsignal (code
);
571 string
= build_string ("unknown");
576 string
= build_unibyte_string (signame
);
577 if (! NILP (Vlocale_coding_system
))
578 string
= (code_convert_string_norecord
579 (string
, Vlocale_coding_system
, 0));
580 c1
= STRING_CHAR (SDATA (string
));
583 Faset (string
, make_number (0), make_number (c2
));
585 AUTO_STRING (suffix
, coredump
? " (core dumped)\n" : "\n");
586 return concat2 (string
, suffix
);
588 else if (EQ (symbol
, Qexit
))
591 return build_string (code
== 0 ? "deleted\n" : "connection broken by remote peer\n");
593 return build_string ("finished\n");
594 AUTO_STRING (prefix
, "exited abnormally with code ");
595 string
= Fnumber_to_string (make_number (code
));
596 AUTO_STRING (suffix
, coredump
? " (core dumped)\n" : "\n");
597 return concat3 (prefix
, string
, suffix
);
599 else if (EQ (symbol
, Qfailed
))
601 AUTO_STRING (prefix
, "failed with code ");
602 string
= Fnumber_to_string (make_number (code
));
603 AUTO_STRING (suffix
, "\n");
604 return concat3 (prefix
, string
, suffix
);
607 return Fcopy_sequence (Fsymbol_name (symbol
));
610 enum { PTY_NAME_SIZE
= 24 };
612 /* Open an available pty, returning a file descriptor.
613 Store into PTY_NAME the file name of the terminal corresponding to the pty.
614 Return -1 on failure. */
617 allocate_pty (char pty_name
[PTY_NAME_SIZE
])
626 for (c
= FIRST_PTY_LETTER
; c
<= 'z'; c
++)
627 for (i
= 0; i
< 16; i
++)
630 #ifdef PTY_NAME_SPRINTF
633 sprintf (pty_name
, "/dev/pty%c%x", c
, i
);
634 #endif /* no PTY_NAME_SPRINTF */
638 #else /* no PTY_OPEN */
639 fd
= emacs_open (pty_name
, O_RDWR
| O_NONBLOCK
, 0);
640 #endif /* no PTY_OPEN */
644 #ifdef PTY_TTY_NAME_SPRINTF
647 sprintf (pty_name
, "/dev/tty%c%x", c
, i
);
648 #endif /* no PTY_TTY_NAME_SPRINTF */
650 /* Set FD's close-on-exec flag. This is needed even if
651 PT_OPEN calls posix_openpt with O_CLOEXEC, since POSIX
652 doesn't require support for that combination.
653 Do this after PTY_TTY_NAME_SPRINTF, which on some platforms
654 doesn't work if the close-on-exec flag is set (Bug#20555).
655 Multithreaded platforms where posix_openpt ignores
656 O_CLOEXEC (or where PTY_OPEN doesn't call posix_openpt)
657 have a race condition between the PTY_OPEN and here. */
658 fcntl (fd
, F_SETFD
, FD_CLOEXEC
);
660 /* Check to make certain that both sides are available.
661 This avoids a nasty yet stupid bug in rlogins. */
662 if (faccessat (AT_FDCWD
, pty_name
, R_OK
| W_OK
, AT_EACCESS
) != 0)
675 #endif /* HAVE_PTYS */
679 /* Allocate basically initialized process. */
681 static struct Lisp_Process
*
682 allocate_process (void)
684 return ALLOCATE_ZEROED_PSEUDOVECTOR (struct Lisp_Process
, pid
, PVEC_PROCESS
);
688 make_process (Lisp_Object name
)
690 register Lisp_Object val
, tem
, name1
;
691 register struct Lisp_Process
*p
;
692 char suffix
[sizeof "<>" + INT_STRLEN_BOUND (printmax_t
)];
695 p
= allocate_process ();
696 /* Initialize Lisp data. Note that allocate_process initializes all
697 Lisp data to nil, so do it only for slots which should not be nil. */
698 pset_status (p
, Qrun
);
699 pset_mark (p
, Fmake_marker ());
701 /* Initialize non-Lisp data. Note that allocate_process zeroes out all
702 non-Lisp data, so do it only for slots which should not be zero. */
705 for (i
= 0; i
< PROCESS_OPEN_FDS
; i
++)
709 p
->gnutls_initstage
= GNUTLS_STAGE_EMPTY
;
710 p
->gnutls_boot_parameters
= Qnil
;
713 /* If name is already in use, modify it until it is unused. */
718 tem
= Fget_process (name1
);
719 if (NILP (tem
)) break;
720 name1
= concat2 (name
, make_formatted_string (suffix
, "<%"pMd
">", i
));
724 pset_sentinel (p
, Qinternal_default_process_sentinel
);
725 pset_filter (p
, Qinternal_default_process_filter
);
726 XSETPROCESS (val
, p
);
727 Vprocess_alist
= Fcons (Fcons (name
, val
), Vprocess_alist
);
732 remove_process (register Lisp_Object proc
)
734 register Lisp_Object pair
;
736 pair
= Frassq (proc
, Vprocess_alist
);
737 Vprocess_alist
= Fdelq (pair
, Vprocess_alist
);
739 deactivate_process (proc
);
742 #ifdef HAVE_GETADDRINFO_A
744 free_dns_request (Lisp_Object proc
)
746 struct Lisp_Process
*p
= XPROCESS (proc
);
748 if (p
->dns_requests
[0]->ar_result
)
749 freeaddrinfo (p
->dns_requests
[0]->ar_result
);
750 xfree ((void *)p
->dns_requests
[0]->ar_request
);
751 xfree ((void *)p
->dns_requests
[0]->ar_name
);
752 xfree ((void *)p
->dns_requests
[0]->ar_service
);
753 xfree (p
->dns_requests
[0]);
754 xfree (p
->dns_requests
);
755 p
->dns_requests
= NULL
;
760 DEFUN ("processp", Fprocessp
, Sprocessp
, 1, 1, 0,
761 doc
: /* Return t if OBJECT is a process. */)
764 return PROCESSP (object
) ? Qt
: Qnil
;
767 DEFUN ("get-process", Fget_process
, Sget_process
, 1, 1, 0,
768 doc
: /* Return the process named NAME, or nil if there is none. */)
769 (register Lisp_Object name
)
774 return Fcdr (Fassoc (name
, Vprocess_alist
));
777 /* This is how commands for the user decode process arguments. It
778 accepts a process, a process name, a buffer, a buffer name, or nil.
779 Buffers denote the first process in the buffer, and nil denotes the
783 get_process (register Lisp_Object name
)
785 register Lisp_Object proc
, obj
;
788 obj
= Fget_process (name
);
790 obj
= Fget_buffer (name
);
792 error ("Process %s does not exist", SDATA (name
));
794 else if (NILP (name
))
795 obj
= Fcurrent_buffer ();
799 /* Now obj should be either a buffer object or a process object. */
802 if (NILP (BVAR (XBUFFER (obj
), name
)))
803 error ("Attempt to get process for a dead buffer");
804 proc
= Fget_buffer_process (obj
);
806 error ("Buffer %s has no process", SDATA (BVAR (XBUFFER (obj
), name
)));
817 /* Fdelete_process promises to immediately forget about the process, but in
818 reality, Emacs needs to remember those processes until they have been
819 treated by the SIGCHLD handler and waitpid has been invoked on them;
820 otherwise they might fill up the kernel's process table.
822 Some processes created by call-process are also put onto this list.
824 Members of this list are (process-ID . filename) pairs. The
825 process-ID is a number; the filename, if a string, is a file that
826 needs to be removed after the process exits. */
827 static Lisp_Object deleted_pid_list
;
830 record_deleted_pid (pid_t pid
, Lisp_Object filename
)
832 deleted_pid_list
= Fcons (Fcons (make_fixnum_or_float (pid
), filename
),
833 /* GC treated elements set to nil. */
834 Fdelq (Qnil
, deleted_pid_list
));
838 DEFUN ("delete-process", Fdelete_process
, Sdelete_process
, 1, 1, 0,
839 doc
: /* Delete PROCESS: kill it and forget about it immediately.
840 PROCESS may be a process, a buffer, the name of a process or buffer, or
841 nil, indicating the current buffer's process. */)
842 (register Lisp_Object process
)
844 register struct Lisp_Process
*p
;
846 process
= get_process (process
);
847 p
= XPROCESS (process
);
849 #ifdef HAVE_GETADDRINFO_A
852 gai_cancel (p
->dns_requests
[0]);
853 free_dns_request (process
);
857 p
->raw_status_new
= 0;
858 if (NETCONN1_P (p
) || SERIALCONN1_P (p
) || PIPECONN1_P (p
))
860 pset_status (p
, list2 (Qexit
, make_number (0)));
861 p
->tick
= ++process_tick
;
862 status_notify (p
, NULL
);
863 redisplay_preserve_echo_area (13);
868 record_kill_process (p
, Qnil
);
872 /* Update P's status, since record_kill_process will make the
873 SIGCHLD handler update deleted_pid_list, not *P. */
875 if (p
->raw_status_new
)
877 symbol
= CONSP (p
->status
) ? XCAR (p
->status
) : p
->status
;
878 if (! (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)))
879 pset_status (p
, list2 (Qsignal
, make_number (SIGKILL
)));
881 p
->tick
= ++process_tick
;
882 status_notify (p
, NULL
);
883 redisplay_preserve_echo_area (13);
886 remove_process (process
);
890 DEFUN ("process-status", Fprocess_status
, Sprocess_status
, 1, 1, 0,
891 doc
: /* Return the status of PROCESS.
892 The returned value is one of the following symbols:
893 run -- for a process that is running.
894 stop -- for a process stopped but continuable.
895 exit -- for a process that has exited.
896 signal -- for a process that has got a fatal signal.
897 open -- for a network stream connection that is open.
898 listen -- for a network stream server that is listening.
899 closed -- for a network stream connection that is closed.
900 connect -- when waiting for a non-blocking connection to complete.
901 failed -- when a non-blocking connection has failed.
902 nil -- if arg is a process name and no such process exists.
903 PROCESS may be a process, a buffer, the name of a process, or
904 nil, indicating the current buffer's process. */)
905 (register Lisp_Object process
)
907 register struct Lisp_Process
*p
;
908 register Lisp_Object status
;
910 if (STRINGP (process
))
911 process
= Fget_process (process
);
913 process
= get_process (process
);
918 p
= XPROCESS (process
);
919 if (p
->raw_status_new
)
923 status
= XCAR (status
);
924 if (NETCONN1_P (p
) || SERIALCONN1_P (p
) || PIPECONN1_P (p
))
926 if (EQ (status
, Qexit
))
928 else if (EQ (p
->command
, Qt
))
930 else if (EQ (status
, Qrun
))
936 DEFUN ("process-exit-status", Fprocess_exit_status
, Sprocess_exit_status
,
938 doc
: /* Return the exit status of PROCESS or the signal number that killed it.
939 If PROCESS has not yet exited or died, return 0. */)
940 (register Lisp_Object process
)
942 CHECK_PROCESS (process
);
943 if (XPROCESS (process
)->raw_status_new
)
944 update_status (XPROCESS (process
));
945 if (CONSP (XPROCESS (process
)->status
))
946 return XCAR (XCDR (XPROCESS (process
)->status
));
947 return make_number (0);
950 DEFUN ("process-id", Fprocess_id
, Sprocess_id
, 1, 1, 0,
951 doc
: /* Return the process id of PROCESS.
952 This is the pid of the external process which PROCESS uses or talks to.
953 For a network connection, this value is nil. */)
954 (register Lisp_Object process
)
958 CHECK_PROCESS (process
);
959 pid
= XPROCESS (process
)->pid
;
960 return (pid
? make_fixnum_or_float (pid
) : Qnil
);
963 DEFUN ("process-name", Fprocess_name
, Sprocess_name
, 1, 1, 0,
964 doc
: /* Return the name of PROCESS, as a string.
965 This is the name of the program invoked in PROCESS,
966 possibly modified to make it unique among process names. */)
967 (register Lisp_Object process
)
969 CHECK_PROCESS (process
);
970 return XPROCESS (process
)->name
;
973 DEFUN ("process-command", Fprocess_command
, Sprocess_command
, 1, 1, 0,
974 doc
: /* Return the command that was executed to start PROCESS.
975 This is a list of strings, the first string being the program executed
976 and the rest of the strings being the arguments given to it.
977 For a network or serial process, this is nil (process is running) or t
978 (process is stopped). */)
979 (register Lisp_Object process
)
981 CHECK_PROCESS (process
);
982 return XPROCESS (process
)->command
;
985 DEFUN ("process-tty-name", Fprocess_tty_name
, Sprocess_tty_name
, 1, 1, 0,
986 doc
: /* Return the name of the terminal PROCESS uses, or nil if none.
987 This is the terminal that the process itself reads and writes on,
988 not the name of the pty that Emacs uses to talk with that terminal. */)
989 (register Lisp_Object process
)
991 CHECK_PROCESS (process
);
992 return XPROCESS (process
)->tty_name
;
995 DEFUN ("set-process-buffer", Fset_process_buffer
, Sset_process_buffer
,
997 doc
: /* Set buffer associated with PROCESS to BUFFER (a buffer, or nil).
999 (register Lisp_Object process
, Lisp_Object buffer
)
1001 struct Lisp_Process
*p
;
1003 CHECK_PROCESS (process
);
1005 CHECK_BUFFER (buffer
);
1006 p
= XPROCESS (process
);
1007 pset_buffer (p
, buffer
);
1008 if (NETCONN1_P (p
) || SERIALCONN1_P (p
) || PIPECONN1_P (p
))
1009 pset_childp (p
, Fplist_put (p
->childp
, QCbuffer
, buffer
));
1010 setup_process_coding_systems (process
);
1014 DEFUN ("process-buffer", Fprocess_buffer
, Sprocess_buffer
,
1016 doc
: /* Return the buffer PROCESS is associated with.
1017 The default process filter inserts output from PROCESS into this buffer. */)
1018 (register Lisp_Object process
)
1020 CHECK_PROCESS (process
);
1021 return XPROCESS (process
)->buffer
;
1024 DEFUN ("process-mark", Fprocess_mark
, Sprocess_mark
,
1026 doc
: /* Return the marker for the end of the last output from PROCESS. */)
1027 (register Lisp_Object process
)
1029 CHECK_PROCESS (process
);
1030 return XPROCESS (process
)->mark
;
1034 set_process_filter_masks (struct Lisp_Process
*p
)
1036 if (EQ (p
->filter
, Qt
) && !EQ (p
->status
, Qlisten
))
1038 FD_CLR (p
->infd
, &input_wait_mask
);
1039 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
1041 else if (EQ (p
->filter
, Qt
)
1042 /* Network or serial process not stopped: */
1043 && !EQ (p
->command
, Qt
))
1045 FD_SET (p
->infd
, &input_wait_mask
);
1046 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
1050 DEFUN ("set-process-filter", Fset_process_filter
, Sset_process_filter
,
1052 doc
: /* Give PROCESS the filter function FILTER; nil means default.
1053 A value of t means stop accepting output from the process.
1055 When a process has a non-default filter, its buffer is not used for output.
1056 Instead, each time it does output, the entire string of output is
1057 passed to the filter.
1059 The filter gets two arguments: the process and the string of output.
1060 The string argument is normally a multibyte string, except:
1061 - if the process's input coding system is no-conversion or raw-text,
1062 it is a unibyte string (the non-converted input), or else
1063 - if `default-enable-multibyte-characters' is nil, it is a unibyte
1064 string (the result of converting the decoded input multibyte
1065 string to unibyte with `string-make-unibyte'). */)
1066 (register Lisp_Object process
, Lisp_Object filter
)
1068 struct Lisp_Process
*p
;
1070 CHECK_PROCESS (process
);
1072 p
= XPROCESS (process
);
1074 /* Don't signal an error if the process's input file descriptor
1075 is closed. This could make debugging Lisp more difficult,
1076 for example when doing something like
1078 (setq process (start-process ...))
1080 (set-process-filter process ...) */
1083 filter
= Qinternal_default_process_filter
;
1085 pset_filter (p
, filter
);
1088 set_process_filter_masks (p
);
1090 if (NETCONN1_P (p
) || SERIALCONN1_P (p
) || PIPECONN1_P (p
))
1091 pset_childp (p
, Fplist_put (p
->childp
, QCfilter
, filter
));
1092 setup_process_coding_systems (process
);
1096 DEFUN ("process-filter", Fprocess_filter
, Sprocess_filter
,
1098 doc
: /* Return the filter function of PROCESS.
1099 See `set-process-filter' for more info on filter functions. */)
1100 (register Lisp_Object process
)
1102 CHECK_PROCESS (process
);
1103 return XPROCESS (process
)->filter
;
1106 DEFUN ("set-process-sentinel", Fset_process_sentinel
, Sset_process_sentinel
,
1108 doc
: /* Give PROCESS the sentinel SENTINEL; nil for default.
1109 The sentinel is called as a function when the process changes state.
1110 It gets two arguments: the process, and a string describing the change. */)
1111 (register Lisp_Object process
, Lisp_Object sentinel
)
1113 struct Lisp_Process
*p
;
1115 CHECK_PROCESS (process
);
1116 p
= XPROCESS (process
);
1118 if (NILP (sentinel
))
1119 sentinel
= Qinternal_default_process_sentinel
;
1121 pset_sentinel (p
, sentinel
);
1122 if (NETCONN1_P (p
) || SERIALCONN1_P (p
) || PIPECONN1_P (p
))
1123 pset_childp (p
, Fplist_put (p
->childp
, QCsentinel
, sentinel
));
1127 DEFUN ("process-sentinel", Fprocess_sentinel
, Sprocess_sentinel
,
1129 doc
: /* Return the sentinel of PROCESS.
1130 See `set-process-sentinel' for more info on sentinels. */)
1131 (register Lisp_Object process
)
1133 CHECK_PROCESS (process
);
1134 return XPROCESS (process
)->sentinel
;
1137 DEFUN ("set-process-window-size", Fset_process_window_size
,
1138 Sset_process_window_size
, 3, 3, 0,
1139 doc
: /* Tell PROCESS that it has logical window size HEIGHT and WIDTH. */)
1140 (Lisp_Object process
, Lisp_Object height
, Lisp_Object width
)
1142 CHECK_PROCESS (process
);
1144 /* All known platforms store window sizes as 'unsigned short'. */
1145 CHECK_RANGED_INTEGER (height
, 0, USHRT_MAX
);
1146 CHECK_RANGED_INTEGER (width
, 0, USHRT_MAX
);
1148 if (NETCONN_P (process
)
1149 || XPROCESS (process
)->infd
< 0
1150 || (set_window_size (XPROCESS (process
)->infd
,
1151 XINT (height
), XINT (width
))
1158 DEFUN ("set-process-inherit-coding-system-flag",
1159 Fset_process_inherit_coding_system_flag
,
1160 Sset_process_inherit_coding_system_flag
, 2, 2, 0,
1161 doc
: /* Determine whether buffer of PROCESS will inherit coding-system.
1162 If the second argument FLAG is non-nil, then the variable
1163 `buffer-file-coding-system' of the buffer associated with PROCESS
1164 will be bound to the value of the coding system used to decode
1167 This is useful when the coding system specified for the process buffer
1168 leaves either the character code conversion or the end-of-line conversion
1169 unspecified, or if the coding system used to decode the process output
1170 is more appropriate for saving the process buffer.
1172 Binding the variable `inherit-process-coding-system' to non-nil before
1173 starting the process is an alternative way of setting the inherit flag
1174 for the process which will run.
1176 This function returns FLAG. */)
1177 (register Lisp_Object process
, Lisp_Object flag
)
1179 CHECK_PROCESS (process
);
1180 XPROCESS (process
)->inherit_coding_system_flag
= !NILP (flag
);
1184 DEFUN ("set-process-query-on-exit-flag",
1185 Fset_process_query_on_exit_flag
, Sset_process_query_on_exit_flag
,
1187 doc
: /* Specify if query is needed for PROCESS when Emacs is exited.
1188 If the second argument FLAG is non-nil, Emacs will query the user before
1189 exiting or killing a buffer if PROCESS is running. This function
1191 (register Lisp_Object process
, Lisp_Object flag
)
1193 CHECK_PROCESS (process
);
1194 XPROCESS (process
)->kill_without_query
= NILP (flag
);
1198 DEFUN ("process-query-on-exit-flag",
1199 Fprocess_query_on_exit_flag
, Sprocess_query_on_exit_flag
,
1201 doc
: /* Return the current value of query-on-exit flag for PROCESS. */)
1202 (register Lisp_Object process
)
1204 CHECK_PROCESS (process
);
1205 return (XPROCESS (process
)->kill_without_query
? Qnil
: Qt
);
1208 DEFUN ("process-contact", Fprocess_contact
, Sprocess_contact
,
1210 doc
: /* Return the contact info of PROCESS; t for a real child.
1211 For a network or serial connection, the value depends on the optional
1212 KEY arg. If KEY is nil, value is a cons cell of the form (HOST
1213 SERVICE) for a network connection or (PORT SPEED) for a serial
1214 connection. If KEY is t, the complete contact information for the
1215 connection is returned, else the specific value for the keyword KEY is
1216 returned. See `make-network-process' or `make-serial-process' for a
1218 If PROCESS is a non-blocking network process that hasn't been fully
1219 set up yet, this function will block until socket setup has completed. */)
1220 (register Lisp_Object process
, Lisp_Object key
)
1222 Lisp_Object contact
;
1224 CHECK_PROCESS (process
);
1225 contact
= XPROCESS (process
)->childp
;
1227 #ifdef DATAGRAM_SOCKETS
1229 if (NETCONN_P (process
))
1230 wait_for_socket_fds (process
, "process-contact");
1232 if (DATAGRAM_CONN_P (process
)
1233 && (EQ (key
, Qt
) || EQ (key
, QCremote
)))
1234 contact
= Fplist_put (contact
, QCremote
,
1235 Fprocess_datagram_address (process
));
1238 if ((!NETCONN_P (process
) && !SERIALCONN_P (process
) && !PIPECONN_P (process
))
1241 if (NILP (key
) && NETCONN_P (process
))
1242 return list2 (Fplist_get (contact
, QChost
),
1243 Fplist_get (contact
, QCservice
));
1244 if (NILP (key
) && SERIALCONN_P (process
))
1245 return list2 (Fplist_get (contact
, QCport
),
1246 Fplist_get (contact
, QCspeed
));
1247 /* FIXME: Return a meaningful value (e.g., the child end of the pipe)
1248 if the pipe process is useful for purposes other than receiving
1250 if (NILP (key
) && PIPECONN_P (process
))
1252 return Fplist_get (contact
, key
);
1255 DEFUN ("process-plist", Fprocess_plist
, Sprocess_plist
,
1257 doc
: /* Return the plist of PROCESS. */)
1258 (register Lisp_Object process
)
1260 CHECK_PROCESS (process
);
1261 return XPROCESS (process
)->plist
;
1264 DEFUN ("set-process-plist", Fset_process_plist
, Sset_process_plist
,
1266 doc
: /* Replace the plist of PROCESS with PLIST. Returns PLIST. */)
1267 (register Lisp_Object process
, Lisp_Object plist
)
1269 CHECK_PROCESS (process
);
1272 pset_plist (XPROCESS (process
), plist
);
1276 #if 0 /* Turned off because we don't currently record this info
1277 in the process. Perhaps add it. */
1278 DEFUN ("process-connection", Fprocess_connection
, Sprocess_connection
, 1, 1, 0,
1279 doc
: /* Return the connection type of PROCESS.
1280 The value is nil for a pipe, t or `pty' for a pty, or `stream' for
1281 a socket connection. */)
1282 (Lisp_Object process
)
1284 return XPROCESS (process
)->type
;
1288 DEFUN ("process-type", Fprocess_type
, Sprocess_type
, 1, 1, 0,
1289 doc
: /* Return the connection type of PROCESS.
1290 The value is either the symbol `real', `network', or `serial'.
1291 PROCESS may be a process, a buffer, the name of a process or buffer, or
1292 nil, indicating the current buffer's process. */)
1293 (Lisp_Object process
)
1296 proc
= get_process (process
);
1297 return XPROCESS (proc
)->type
;
1300 DEFUN ("format-network-address", Fformat_network_address
, Sformat_network_address
,
1302 doc
: /* Convert network ADDRESS from internal format to a string.
1303 A 4 or 5 element vector represents an IPv4 address (with port number).
1304 An 8 or 9 element vector represents an IPv6 address (with port number).
1305 If optional second argument OMIT-PORT is non-nil, don't include a port
1306 number in the string, even when present in ADDRESS.
1307 Returns nil if format of ADDRESS is invalid. */)
1308 (Lisp_Object address
, Lisp_Object omit_port
)
1313 if (STRINGP (address
)) /* AF_LOCAL */
1316 if (VECTORP (address
)) /* AF_INET or AF_INET6 */
1318 register struct Lisp_Vector
*p
= XVECTOR (address
);
1319 ptrdiff_t size
= p
->header
.size
;
1320 Lisp_Object args
[10];
1324 if (size
== 4 || (size
== 5 && !NILP (omit_port
)))
1326 format
= "%d.%d.%d.%d";
1331 format
= "%d.%d.%d.%d:%d";
1334 else if (size
== 8 || (size
== 9 && !NILP (omit_port
)))
1336 format
= "%x:%x:%x:%x:%x:%x:%x:%x";
1341 format
= "[%x:%x:%x:%x:%x:%x:%x:%x]:%d";
1347 AUTO_STRING (format_obj
, format
);
1348 args
[0] = format_obj
;
1350 for (i
= 0; i
< nargs
; i
++)
1352 if (! RANGED_INTEGERP (0, p
->contents
[i
], 65535))
1355 if (nargs
<= 5 /* IPv4 */
1356 && i
< 4 /* host, not port */
1357 && XINT (p
->contents
[i
]) > 255)
1360 args
[i
+ 1] = p
->contents
[i
];
1363 return Fformat (nargs
+ 1, args
);
1366 if (CONSP (address
))
1368 AUTO_STRING (format
, "<Family %d>");
1369 return CALLN (Fformat
, format
, Fcar (address
));
1375 DEFUN ("process-list", Fprocess_list
, Sprocess_list
, 0, 0, 0,
1376 doc
: /* Return a list of all processes that are Emacs sub-processes. */)
1379 return Fmapcar (Qcdr
, Vprocess_alist
);
1382 /* Starting asynchronous inferior processes. */
1384 static void start_process_unwind (Lisp_Object proc
);
1386 DEFUN ("make-process", Fmake_process
, Smake_process
, 0, MANY
, 0,
1387 doc
: /* Start a program in a subprocess. Return the process object for it.
1389 This is similar to `start-process', but arguments are specified as
1390 keyword/argument pairs. The following arguments are defined:
1392 :name NAME -- NAME is name for process. It is modified if necessary
1395 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
1396 with the process. Process output goes at end of that buffer, unless
1397 you specify an output stream or filter function to handle the output.
1398 BUFFER may be also nil, meaning that this process is not associated
1401 :command COMMAND -- COMMAND is a list starting with the program file
1402 name, followed by strings to give to the program as arguments.
1404 :coding CODING -- If CODING is a symbol, it specifies the coding
1405 system used for both reading and writing for this process. If CODING
1406 is a cons (DECODING . ENCODING), DECODING is used for reading, and
1407 ENCODING is used for writing.
1409 :noquery BOOL -- When exiting Emacs, query the user if BOOL is nil and
1410 the process is running. If BOOL is not given, query before exiting.
1412 :stop BOOL -- Start process in the `stopped' state if BOOL non-nil.
1413 In the stopped state, a process does not accept incoming data, but you
1414 can send outgoing data. The stopped state is cleared by
1415 `continue-process' and set by `stop-process'.
1417 :connection-type TYPE -- TYPE is control type of device used to
1418 communicate with subprocesses. Values are `pipe' to use a pipe, `pty'
1419 to use a pty, or nil to use the default specified through
1420 `process-connection-type'.
1422 :filter FILTER -- Install FILTER as the process filter.
1424 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
1426 :stderr STDERR -- STDERR is either a buffer or a pipe process attached
1427 to the standard error of subprocess. Specifying this implies
1428 `:connection-type' is set to `pipe'.
1430 usage: (make-process &rest ARGS) */)
1431 (ptrdiff_t nargs
, Lisp_Object
*args
)
1433 Lisp_Object buffer
, name
, command
, program
, proc
, contact
, current_dir
, tem
;
1434 Lisp_Object xstderr
, stderrproc
;
1435 ptrdiff_t count
= SPECPDL_INDEX ();
1441 /* Save arguments for process-contact and clone-process. */
1442 contact
= Flist (nargs
, args
);
1444 buffer
= Fplist_get (contact
, QCbuffer
);
1446 buffer
= Fget_buffer_create (buffer
);
1448 /* Make sure that the child will be able to chdir to the current
1449 buffer's current directory, or its unhandled equivalent. We
1450 can't just have the child check for an error when it does the
1451 chdir, since it's in a vfork. */
1452 current_dir
= encode_current_directory ();
1454 name
= Fplist_get (contact
, QCname
);
1455 CHECK_STRING (name
);
1457 command
= Fplist_get (contact
, QCcommand
);
1458 if (CONSP (command
))
1459 program
= XCAR (command
);
1463 if (!NILP (program
))
1464 CHECK_STRING (program
);
1467 xstderr
= Fplist_get (contact
, QCstderr
);
1468 if (PROCESSP (xstderr
))
1470 if (!PIPECONN_P (xstderr
))
1471 error ("Process is not a pipe process");
1472 stderrproc
= xstderr
;
1474 else if (!NILP (xstderr
))
1476 CHECK_STRING (program
);
1477 stderrproc
= CALLN (Fmake_pipe_process
,
1479 concat2 (name
, build_string (" stderr")),
1481 Fget_buffer_create (xstderr
));
1484 proc
= make_process (name
);
1485 /* If an error occurs and we can't start the process, we want to
1486 remove it from the process list. This means that each error
1487 check in create_process doesn't need to call remove_process
1488 itself; it's all taken care of here. */
1489 record_unwind_protect (start_process_unwind
, proc
);
1491 pset_childp (XPROCESS (proc
), Qt
);
1492 pset_plist (XPROCESS (proc
), Qnil
);
1493 pset_type (XPROCESS (proc
), Qreal
);
1494 pset_buffer (XPROCESS (proc
), buffer
);
1495 pset_sentinel (XPROCESS (proc
), Fplist_get (contact
, QCsentinel
));
1496 pset_filter (XPROCESS (proc
), Fplist_get (contact
, QCfilter
));
1497 pset_command (XPROCESS (proc
), Fcopy_sequence (command
));
1499 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
1500 XPROCESS (proc
)->kill_without_query
= 1;
1501 if (tem
= Fplist_get (contact
, QCstop
), !NILP (tem
))
1502 pset_command (XPROCESS (proc
), Qt
);
1504 tem
= Fplist_get (contact
, QCconnection_type
);
1506 XPROCESS (proc
)->pty_flag
= true;
1507 else if (EQ (tem
, Qpipe
))
1508 XPROCESS (proc
)->pty_flag
= false;
1509 else if (NILP (tem
))
1510 XPROCESS (proc
)->pty_flag
= !NILP (Vprocess_connection_type
);
1512 report_file_error ("Unknown connection type", tem
);
1514 if (!NILP (stderrproc
))
1516 pset_stderrproc (XPROCESS (proc
), stderrproc
);
1518 XPROCESS (proc
)->pty_flag
= false;
1522 /* AKA GNUTLS_INITSTAGE(proc). */
1523 XPROCESS (proc
)->gnutls_initstage
= GNUTLS_STAGE_EMPTY
;
1524 pset_gnutls_cred_type (XPROCESS (proc
), Qnil
);
1527 XPROCESS (proc
)->adaptive_read_buffering
1528 = (NILP (Vprocess_adaptive_read_buffering
) ? 0
1529 : EQ (Vprocess_adaptive_read_buffering
, Qt
) ? 1 : 2);
1531 /* Make the process marker point into the process buffer (if any). */
1532 if (BUFFERP (buffer
))
1533 set_marker_both (XPROCESS (proc
)->mark
, buffer
,
1534 BUF_ZV (XBUFFER (buffer
)),
1535 BUF_ZV_BYTE (XBUFFER (buffer
)));
1538 /* Decide coding systems for communicating with the process. Here
1539 we don't setup the structure coding_system nor pay attention to
1540 unibyte mode. They are done in create_process. */
1542 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
1543 Lisp_Object coding_systems
= Qt
;
1544 Lisp_Object val
, *args2
;
1546 tem
= Fplist_get (contact
, QCcoding
);
1554 val
= Vcoding_system_for_read
;
1557 ptrdiff_t nargs2
= 3 + XINT (Flength (command
));
1559 SAFE_ALLOCA_LISP (args2
, nargs2
);
1561 args2
[i
++] = Qstart_process
;
1563 args2
[i
++] = buffer
;
1564 for (tem2
= command
; CONSP (tem2
); tem2
= XCDR (tem2
))
1565 args2
[i
++] = XCAR (tem2
);
1566 if (!NILP (program
))
1567 coding_systems
= Ffind_operation_coding_system (nargs2
, args2
);
1568 if (CONSP (coding_systems
))
1569 val
= XCAR (coding_systems
);
1570 else if (CONSP (Vdefault_process_coding_system
))
1571 val
= XCAR (Vdefault_process_coding_system
);
1573 pset_decode_coding_system (XPROCESS (proc
), val
);
1582 val
= Vcoding_system_for_write
;
1585 if (EQ (coding_systems
, Qt
))
1587 ptrdiff_t nargs2
= 3 + XINT (Flength (command
));
1589 SAFE_ALLOCA_LISP (args2
, nargs2
);
1591 args2
[i
++] = Qstart_process
;
1593 args2
[i
++] = buffer
;
1594 for (tem2
= command
; CONSP (tem2
); tem2
= XCDR (tem2
))
1595 args2
[i
++] = XCAR (tem2
);
1596 if (!NILP (program
))
1597 coding_systems
= Ffind_operation_coding_system (nargs2
, args2
);
1599 if (CONSP (coding_systems
))
1600 val
= XCDR (coding_systems
);
1601 else if (CONSP (Vdefault_process_coding_system
))
1602 val
= XCDR (Vdefault_process_coding_system
);
1604 pset_encode_coding_system (XPROCESS (proc
), val
);
1605 /* Note: At this moment, the above coding system may leave
1606 text-conversion or eol-conversion unspecified. They will be
1607 decided after we read output from the process and decode it by
1608 some coding system, or just before we actually send a text to
1613 pset_decoding_buf (XPROCESS (proc
), empty_unibyte_string
);
1614 XPROCESS (proc
)->decoding_carryover
= 0;
1615 pset_encoding_buf (XPROCESS (proc
), empty_unibyte_string
);
1617 XPROCESS (proc
)->inherit_coding_system_flag
1618 = !(NILP (buffer
) || !inherit_process_coding_system
);
1620 if (!NILP (program
))
1622 Lisp_Object program_args
= XCDR (command
);
1624 /* If program file name is not absolute, search our path for it.
1625 Put the name we will really use in TEM. */
1626 if (!IS_DIRECTORY_SEP (SREF (program
, 0))
1627 && !(SCHARS (program
) > 1
1628 && IS_DEVICE_SEP (SREF (program
, 1))))
1631 openp (Vexec_path
, program
, Vexec_suffixes
, &tem
,
1632 make_number (X_OK
), false);
1634 report_file_error ("Searching for program", program
);
1635 tem
= Fexpand_file_name (tem
, Qnil
);
1639 if (!NILP (Ffile_directory_p (program
)))
1640 error ("Specified program for new process is a directory");
1644 /* Remove "/:" from TEM. */
1645 tem
= remove_slash_colon (tem
);
1647 Lisp_Object arg_encoding
= Qnil
;
1649 /* Encode the file name and put it in NEW_ARGV.
1650 That's where the child will use it to execute the program. */
1651 tem
= list1 (ENCODE_FILE (tem
));
1652 ptrdiff_t new_argc
= 1;
1654 /* Here we encode arguments by the coding system used for sending
1655 data to the process. We don't support using different coding
1656 systems for encoding arguments and for encoding data sent to the
1659 for (Lisp_Object tem2
= program_args
; CONSP (tem2
); tem2
= XCDR (tem2
))
1661 Lisp_Object arg
= XCAR (tem2
);
1663 if (STRING_MULTIBYTE (arg
))
1665 if (NILP (arg_encoding
))
1666 arg_encoding
= (complement_process_encoding_system
1667 (XPROCESS (proc
)->encode_coding_system
));
1668 arg
= code_convert_string_norecord (arg
, arg_encoding
, 1);
1670 tem
= Fcons (arg
, tem
);
1674 /* Now that everything is encoded we can collect the strings into
1677 SAFE_NALLOCA (new_argv
, 1, new_argc
+ 1);
1678 new_argv
[new_argc
] = 0;
1680 for (ptrdiff_t i
= new_argc
- 1; i
>= 0; i
--)
1682 new_argv
[i
] = SSDATA (XCAR (tem
));
1686 create_process (proc
, new_argv
, current_dir
);
1692 return unbind_to (count
, proc
);
1695 /* This function is the unwind_protect form for Fstart_process. If
1696 PROC doesn't have its pid set, then we know someone has signaled
1697 an error and the process wasn't started successfully, so we should
1698 remove it from the process list. */
1700 start_process_unwind (Lisp_Object proc
)
1702 if (!PROCESSP (proc
))
1705 /* Was PROC started successfully?
1706 -2 is used for a pty with no process, eg for gdb. */
1707 if (XPROCESS (proc
)->pid
<= 0 && XPROCESS (proc
)->pid
!= -2)
1708 remove_process (proc
);
1711 /* If *FD_ADDR is nonnegative, close it, and mark it as closed. */
1714 close_process_fd (int *fd_addr
)
1724 /* Indexes of file descriptors in open_fds. */
1727 /* The pipe from Emacs to its subprocess. */
1729 WRITE_TO_SUBPROCESS
,
1731 /* The main pipe from the subprocess to Emacs. */
1732 READ_FROM_SUBPROCESS
,
1735 /* The pipe from the subprocess to Emacs that is closed when the
1736 subprocess execs. */
1737 READ_FROM_EXEC_MONITOR
,
1741 verify (PROCESS_OPEN_FDS
== EXEC_MONITOR_OUTPUT
+ 1);
1744 create_process (Lisp_Object process
, char **new_argv
, Lisp_Object current_dir
)
1746 struct Lisp_Process
*p
= XPROCESS (process
);
1747 int inchannel
, outchannel
;
1750 int forkin
, forkout
, forkerr
= -1;
1752 char pty_name
[PTY_NAME_SIZE
];
1753 Lisp_Object lisp_pty_name
= Qnil
;
1756 inchannel
= outchannel
= -1;
1759 outchannel
= inchannel
= allocate_pty (pty_name
);
1763 p
->open_fd
[READ_FROM_SUBPROCESS
] = inchannel
;
1764 #if ! defined (USG) || defined (USG_SUBTTY_WORKS)
1765 /* On most USG systems it does not work to open the pty's tty here,
1766 then close it and reopen it in the child. */
1767 /* Don't let this terminal become our controlling terminal
1768 (in case we don't have one). */
1769 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1771 report_file_error ("Opening pty", Qnil
);
1772 p
->open_fd
[SUBPROCESS_STDIN
] = forkin
;
1774 forkin
= forkout
= -1;
1775 #endif /* not USG, or USG_SUBTTY_WORKS */
1777 lisp_pty_name
= build_string (pty_name
);
1781 if (emacs_pipe (p
->open_fd
+ SUBPROCESS_STDIN
) != 0
1782 || emacs_pipe (p
->open_fd
+ READ_FROM_SUBPROCESS
) != 0)
1783 report_file_error ("Creating pipe", Qnil
);
1784 forkin
= p
->open_fd
[SUBPROCESS_STDIN
];
1785 outchannel
= p
->open_fd
[WRITE_TO_SUBPROCESS
];
1786 inchannel
= p
->open_fd
[READ_FROM_SUBPROCESS
];
1787 forkout
= p
->open_fd
[SUBPROCESS_STDOUT
];
1789 if (!NILP (p
->stderrproc
))
1791 struct Lisp_Process
*pp
= XPROCESS (p
->stderrproc
);
1793 forkerr
= pp
->open_fd
[SUBPROCESS_STDOUT
];
1795 /* Close unnecessary file descriptors. */
1796 close_process_fd (&pp
->open_fd
[WRITE_TO_SUBPROCESS
]);
1797 close_process_fd (&pp
->open_fd
[SUBPROCESS_STDIN
]);
1802 if (emacs_pipe (p
->open_fd
+ READ_FROM_EXEC_MONITOR
) != 0)
1803 report_file_error ("Creating pipe", Qnil
);
1806 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1807 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
1809 /* Record this as an active process, with its channels. */
1810 chan_process
[inchannel
] = process
;
1811 p
->infd
= inchannel
;
1812 p
->outfd
= outchannel
;
1814 /* Previously we recorded the tty descriptor used in the subprocess.
1815 It was only used for getting the foreground tty process, so now
1816 we just reopen the device (see emacs_get_tty_pgrp) as this is
1817 more portable (see USG_SUBTTY_WORKS above). */
1819 p
->pty_flag
= pty_flag
;
1820 pset_status (p
, Qrun
);
1822 if (!EQ (p
->command
, Qt
))
1824 FD_SET (inchannel
, &input_wait_mask
);
1825 FD_SET (inchannel
, &non_keyboard_wait_mask
);
1828 if (inchannel
> max_process_desc
)
1829 max_process_desc
= inchannel
;
1831 /* This may signal an error. */
1832 setup_process_coding_systems (process
);
1835 block_child_signal (&oldset
);
1838 /* vfork, and prevent local vars from being clobbered by the vfork. */
1839 Lisp_Object
volatile current_dir_volatile
= current_dir
;
1840 Lisp_Object
volatile lisp_pty_name_volatile
= lisp_pty_name
;
1841 char **volatile new_argv_volatile
= new_argv
;
1842 int volatile forkin_volatile
= forkin
;
1843 int volatile forkout_volatile
= forkout
;
1844 int volatile forkerr_volatile
= forkerr
;
1845 struct Lisp_Process
*p_volatile
= p
;
1849 current_dir
= current_dir_volatile
;
1850 lisp_pty_name
= lisp_pty_name_volatile
;
1851 new_argv
= new_argv_volatile
;
1852 forkin
= forkin_volatile
;
1853 forkout
= forkout_volatile
;
1854 forkerr
= forkerr_volatile
;
1857 pty_flag
= p
->pty_flag
;
1860 #endif /* not WINDOWSNT */
1862 /* Make the pty be the controlling terminal of the process. */
1864 /* First, disconnect its current controlling terminal. */
1865 /* We tried doing setsid only if pty_flag, but it caused
1866 process_set_signal to fail on SGI when using a pipe. */
1868 /* Make the pty's terminal the controlling terminal. */
1869 if (pty_flag
&& forkin
>= 0)
1872 /* We ignore the return value
1873 because faith@cs.unc.edu says that is necessary on Linux. */
1874 ioctl (forkin
, TIOCSCTTY
, 0);
1877 #if defined (LDISC1)
1878 if (pty_flag
&& forkin
>= 0)
1881 tcgetattr (forkin
, &t
);
1883 if (tcsetattr (forkin
, TCSANOW
, &t
) < 0)
1884 emacs_perror ("create_process/tcsetattr LDISC1");
1887 #if defined (NTTYDISC) && defined (TIOCSETD)
1888 if (pty_flag
&& forkin
>= 0)
1890 /* Use new line discipline. */
1891 int ldisc
= NTTYDISC
;
1892 ioctl (forkin
, TIOCSETD
, &ldisc
);
1897 /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you
1898 can do TIOCSPGRP only to the process's controlling tty. */
1901 /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here?
1902 I can't test it since I don't have 4.3. */
1903 int j
= emacs_open ("/dev/tty", O_RDWR
, 0);
1906 ioctl (j
, TIOCNOTTY
, 0);
1910 #endif /* TIOCNOTTY */
1912 #if !defined (DONT_REOPEN_PTY)
1913 /*** There is a suggestion that this ought to be a
1914 conditional on TIOCSPGRP, or !defined TIOCSCTTY.
1915 Trying the latter gave the wrong results on Debian GNU/Linux 1.1;
1916 that system does seem to need this code, even though
1917 both TIOCSCTTY is defined. */
1918 /* Now close the pty (if we had it open) and reopen it.
1919 This makes the pty the controlling terminal of the subprocess. */
1923 /* I wonder if emacs_close (emacs_open (SSDATA (lisp_pty_name), ...))
1926 emacs_close (forkin
);
1927 forkout
= forkin
= emacs_open (SSDATA (lisp_pty_name
), O_RDWR
, 0);
1931 emacs_perror (SSDATA (lisp_pty_name
));
1932 _exit (EXIT_CANCELED
);
1936 #endif /* not DONT_REOPEN_PTY */
1938 #ifdef SETUP_SLAVE_PTY
1943 #endif /* SETUP_SLAVE_PTY */
1944 #endif /* HAVE_PTYS */
1946 signal (SIGINT
, SIG_DFL
);
1947 signal (SIGQUIT
, SIG_DFL
);
1949 signal (SIGPROF
, SIG_DFL
);
1952 /* Emacs ignores SIGPIPE, but the child should not. */
1953 signal (SIGPIPE
, SIG_DFL
);
1955 /* Stop blocking SIGCHLD in the child. */
1956 unblock_child_signal (&oldset
);
1959 child_setup_tty (forkout
);
1964 pid
= child_setup (forkin
, forkout
, forkerr
, new_argv
, 1, current_dir
);
1965 #else /* not WINDOWSNT */
1966 child_setup (forkin
, forkout
, forkerr
, new_argv
, 1, current_dir
);
1967 #endif /* not WINDOWSNT */
1970 /* Back in the parent process. */
1972 vfork_errno
= errno
;
1977 /* Stop blocking in the parent. */
1978 unblock_child_signal (&oldset
);
1982 report_file_errno ("Doing vfork", Qnil
, vfork_errno
);
1985 /* vfork succeeded. */
1987 /* Close the pipe ends that the child uses, or the child's pty. */
1988 close_process_fd (&p
->open_fd
[SUBPROCESS_STDIN
]);
1989 close_process_fd (&p
->open_fd
[SUBPROCESS_STDOUT
]);
1992 register_child (pid
, inchannel
);
1993 #endif /* WINDOWSNT */
1995 pset_tty_name (p
, lisp_pty_name
);
1998 /* Wait for child_setup to complete in case that vfork is
1999 actually defined as fork. The descriptor
2000 XPROCESS (proc)->open_fd[EXEC_MONITOR_OUTPUT]
2001 of a pipe is closed at the child side either by close-on-exec
2002 on successful execve or the _exit call in child_setup. */
2006 close_process_fd (&p
->open_fd
[EXEC_MONITOR_OUTPUT
]);
2007 emacs_read (p
->open_fd
[READ_FROM_EXEC_MONITOR
], &dummy
, 1);
2008 close_process_fd (&p
->open_fd
[READ_FROM_EXEC_MONITOR
]);
2011 if (!NILP (p
->stderrproc
))
2013 struct Lisp_Process
*pp
= XPROCESS (p
->stderrproc
);
2014 close_process_fd (&pp
->open_fd
[SUBPROCESS_STDOUT
]);
2020 create_pty (Lisp_Object process
)
2022 struct Lisp_Process
*p
= XPROCESS (process
);
2023 char pty_name
[PTY_NAME_SIZE
];
2024 int pty_fd
= !p
->pty_flag
? -1 : allocate_pty (pty_name
);
2028 p
->open_fd
[SUBPROCESS_STDIN
] = pty_fd
;
2029 #if ! defined (USG) || defined (USG_SUBTTY_WORKS)
2030 /* On most USG systems it does not work to open the pty's tty here,
2031 then close it and reopen it in the child. */
2032 /* Don't let this terminal become our controlling terminal
2033 (in case we don't have one). */
2034 int forkout
= emacs_open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
2036 report_file_error ("Opening pty", Qnil
);
2037 p
->open_fd
[WRITE_TO_SUBPROCESS
] = forkout
;
2038 #if defined (DONT_REOPEN_PTY)
2039 /* In the case that vfork is defined as fork, the parent process
2040 (Emacs) may send some data before the child process completes
2041 tty options setup. So we setup tty before forking. */
2042 child_setup_tty (forkout
);
2043 #endif /* DONT_REOPEN_PTY */
2044 #endif /* not USG, or USG_SUBTTY_WORKS */
2046 fcntl (pty_fd
, F_SETFL
, O_NONBLOCK
);
2048 /* Record this as an active process, with its channels.
2049 As a result, child_setup will close Emacs's side of the pipes. */
2050 chan_process
[pty_fd
] = process
;
2054 /* Previously we recorded the tty descriptor used in the subprocess.
2055 It was only used for getting the foreground tty process, so now
2056 we just reopen the device (see emacs_get_tty_pgrp) as this is
2057 more portable (see USG_SUBTTY_WORKS above). */
2060 pset_status (p
, Qrun
);
2061 setup_process_coding_systems (process
);
2063 FD_SET (pty_fd
, &input_wait_mask
);
2064 FD_SET (pty_fd
, &non_keyboard_wait_mask
);
2065 if (pty_fd
> max_process_desc
)
2066 max_process_desc
= pty_fd
;
2068 pset_tty_name (p
, build_string (pty_name
));
2074 DEFUN ("make-pipe-process", Fmake_pipe_process
, Smake_pipe_process
,
2076 doc
: /* Create and return a bidirectional pipe process.
2078 In Emacs, pipes are represented by process objects, so input and
2079 output work as for subprocesses, and `delete-process' closes a pipe.
2080 However, a pipe process has no process id, it cannot be signaled,
2081 and the status codes are different from normal processes.
2083 Arguments are specified as keyword/argument pairs. The following
2084 arguments are defined:
2086 :name NAME -- NAME is the name of the process. It is modified if necessary to make it unique.
2088 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
2089 with the process. Process output goes at the end of that buffer,
2090 unless you specify an output stream or filter function to handle the
2091 output. If BUFFER is not given, the value of NAME is used.
2093 :coding CODING -- If CODING is a symbol, it specifies the coding
2094 system used for both reading and writing for this process. If CODING
2095 is a cons (DECODING . ENCODING), DECODING is used for reading, and
2096 ENCODING is used for writing.
2098 :noquery BOOL -- When exiting Emacs, query the user if BOOL is nil and
2099 the process is running. If BOOL is not given, query before exiting.
2101 :stop BOOL -- Start process in the `stopped' state if BOOL non-nil.
2102 In the stopped state, a pipe process does not accept incoming data,
2103 but you can send outgoing data. The stopped state is cleared by
2104 `continue-process' and set by `stop-process'.
2106 :filter FILTER -- Install FILTER as the process filter.
2108 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
2110 usage: (make-pipe-process &rest ARGS) */)
2111 (ptrdiff_t nargs
, Lisp_Object
*args
)
2113 Lisp_Object proc
, contact
;
2114 struct Lisp_Process
*p
;
2115 Lisp_Object name
, buffer
;
2117 ptrdiff_t specpdl_count
;
2118 int inchannel
, outchannel
;
2123 contact
= Flist (nargs
, args
);
2125 name
= Fplist_get (contact
, QCname
);
2126 CHECK_STRING (name
);
2127 proc
= make_process (name
);
2128 specpdl_count
= SPECPDL_INDEX ();
2129 record_unwind_protect (remove_process
, proc
);
2130 p
= XPROCESS (proc
);
2132 if (emacs_pipe (p
->open_fd
+ SUBPROCESS_STDIN
) != 0
2133 || emacs_pipe (p
->open_fd
+ READ_FROM_SUBPROCESS
) != 0)
2134 report_file_error ("Creating pipe", Qnil
);
2135 outchannel
= p
->open_fd
[WRITE_TO_SUBPROCESS
];
2136 inchannel
= p
->open_fd
[READ_FROM_SUBPROCESS
];
2138 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
2139 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
2142 register_aux_fd (inchannel
);
2145 /* Record this as an active process, with its channels. */
2146 chan_process
[inchannel
] = proc
;
2147 p
->infd
= inchannel
;
2148 p
->outfd
= outchannel
;
2150 if (inchannel
> max_process_desc
)
2151 max_process_desc
= inchannel
;
2153 buffer
= Fplist_get (contact
, QCbuffer
);
2156 buffer
= Fget_buffer_create (buffer
);
2157 pset_buffer (p
, buffer
);
2159 pset_childp (p
, contact
);
2160 pset_plist (p
, Fcopy_sequence (Fplist_get (contact
, QCplist
)));
2161 pset_type (p
, Qpipe
);
2162 pset_sentinel (p
, Fplist_get (contact
, QCsentinel
));
2163 pset_filter (p
, Fplist_get (contact
, QCfilter
));
2165 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
2166 p
->kill_without_query
= 1;
2167 if (tem
= Fplist_get (contact
, QCstop
), !NILP (tem
))
2168 pset_command (p
, Qt
);
2169 eassert (! p
->pty_flag
);
2171 if (!EQ (p
->command
, Qt
))
2173 FD_SET (inchannel
, &input_wait_mask
);
2174 FD_SET (inchannel
, &non_keyboard_wait_mask
);
2176 p
->adaptive_read_buffering
2177 = (NILP (Vprocess_adaptive_read_buffering
) ? 0
2178 : EQ (Vprocess_adaptive_read_buffering
, Qt
) ? 1 : 2);
2180 /* Make the process marker point into the process buffer (if any). */
2181 if (BUFFERP (buffer
))
2182 set_marker_both (p
->mark
, buffer
,
2183 BUF_ZV (XBUFFER (buffer
)),
2184 BUF_ZV_BYTE (XBUFFER (buffer
)));
2187 /* Setup coding systems for communicating with the network stream. */
2189 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
2190 Lisp_Object coding_systems
= Qt
;
2193 tem
= Fplist_get (contact
, QCcoding
);
2201 else if (!NILP (Vcoding_system_for_read
))
2202 val
= Vcoding_system_for_read
;
2203 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
2204 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
2205 /* We dare not decode end-of-line format by setting VAL to
2206 Qraw_text, because the existing Emacs Lisp libraries
2207 assume that they receive bare code including a sequence of
2212 if (CONSP (coding_systems
))
2213 val
= XCAR (coding_systems
);
2214 else if (CONSP (Vdefault_process_coding_system
))
2215 val
= XCAR (Vdefault_process_coding_system
);
2219 pset_decode_coding_system (p
, val
);
2227 else if (!NILP (Vcoding_system_for_write
))
2228 val
= Vcoding_system_for_write
;
2229 else if (NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
2233 if (CONSP (coding_systems
))
2234 val
= XCDR (coding_systems
);
2235 else if (CONSP (Vdefault_process_coding_system
))
2236 val
= XCDR (Vdefault_process_coding_system
);
2240 pset_encode_coding_system (p
, val
);
2242 /* This may signal an error. */
2243 setup_process_coding_systems (proc
);
2245 specpdl_ptr
= specpdl
+ specpdl_count
;
2251 /* Convert an internal struct sockaddr to a lisp object (vector or string).
2252 The address family of sa is not included in the result. */
2255 conv_sockaddr_to_lisp (struct sockaddr
*sa
, int len
)
2257 Lisp_Object address
;
2260 register struct Lisp_Vector
*p
;
2262 /* Workaround for a bug in getsockname on BSD: Names bound to
2263 sockets in the UNIX domain are inaccessible; getsockname returns
2264 a zero length name. */
2265 if (len
< offsetof (struct sockaddr
, sa_family
) + sizeof (sa
->sa_family
))
2266 return empty_unibyte_string
;
2268 switch (sa
->sa_family
)
2272 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2273 len
= sizeof (sin
->sin_addr
) + 1;
2274 address
= Fmake_vector (make_number (len
), Qnil
);
2275 p
= XVECTOR (address
);
2276 p
->contents
[--len
] = make_number (ntohs (sin
->sin_port
));
2277 cp
= (unsigned char *) &sin
->sin_addr
;
2283 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*) sa
;
2284 uint16_t *ip6
= (uint16_t *) &sin6
->sin6_addr
;
2285 len
= sizeof (sin6
->sin6_addr
) / 2 + 1;
2286 address
= Fmake_vector (make_number (len
), Qnil
);
2287 p
= XVECTOR (address
);
2288 p
->contents
[--len
] = make_number (ntohs (sin6
->sin6_port
));
2289 for (i
= 0; i
< len
; i
++)
2290 p
->contents
[i
] = make_number (ntohs (ip6
[i
]));
2294 #ifdef HAVE_LOCAL_SOCKETS
2297 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2298 ptrdiff_t name_length
= len
- offsetof (struct sockaddr_un
, sun_path
);
2299 /* If the first byte is NUL, the name is a Linux abstract
2300 socket name, and the name can contain embedded NULs. If
2301 it's not, we have a NUL-terminated string. Be careful not
2302 to walk past the end of the object looking for the name
2303 terminator, however. */
2304 if (name_length
> 0 && sockun
->sun_path
[0] != '\0')
2306 const char *terminator
2307 = memchr (sockun
->sun_path
, '\0', name_length
);
2310 name_length
= terminator
- (const char *) sockun
->sun_path
;
2313 return make_unibyte_string (sockun
->sun_path
, name_length
);
2317 len
-= offsetof (struct sockaddr
, sa_family
) + sizeof (sa
->sa_family
);
2318 address
= Fcons (make_number (sa
->sa_family
),
2319 Fmake_vector (make_number (len
), Qnil
));
2320 p
= XVECTOR (XCDR (address
));
2321 cp
= (unsigned char *) &sa
->sa_family
+ sizeof (sa
->sa_family
);
2327 p
->contents
[i
++] = make_number (*cp
++);
2333 /* Get family and required size for sockaddr structure to hold ADDRESS. */
2336 get_lisp_to_sockaddr_size (Lisp_Object address
, int *familyp
)
2338 register struct Lisp_Vector
*p
;
2340 if (VECTORP (address
))
2342 p
= XVECTOR (address
);
2343 if (p
->header
.size
== 5)
2346 return sizeof (struct sockaddr_in
);
2349 else if (p
->header
.size
== 9)
2351 *familyp
= AF_INET6
;
2352 return sizeof (struct sockaddr_in6
);
2356 #ifdef HAVE_LOCAL_SOCKETS
2357 else if (STRINGP (address
))
2359 *familyp
= AF_LOCAL
;
2360 return sizeof (struct sockaddr_un
);
2363 else if (CONSP (address
) && TYPE_RANGED_INTEGERP (int, XCAR (address
))
2364 && VECTORP (XCDR (address
)))
2366 struct sockaddr
*sa
;
2367 p
= XVECTOR (XCDR (address
));
2368 if (MAX_ALLOCA
- sizeof sa
->sa_family
< p
->header
.size
)
2370 *familyp
= XINT (XCAR (address
));
2371 return p
->header
.size
+ sizeof (sa
->sa_family
);
2376 /* Convert an address object (vector or string) to an internal sockaddr.
2378 The address format has been basically validated by
2379 get_lisp_to_sockaddr_size, but this does not mean FAMILY is valid;
2380 it could have come from user data. So if FAMILY is not valid,
2381 we return after zeroing *SA. */
2384 conv_lisp_to_sockaddr (int family
, Lisp_Object address
, struct sockaddr
*sa
, int len
)
2386 register struct Lisp_Vector
*p
;
2387 register unsigned char *cp
= NULL
;
2391 memset (sa
, 0, len
);
2393 if (VECTORP (address
))
2395 p
= XVECTOR (address
);
2396 if (family
== AF_INET
)
2398 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2399 len
= sizeof (sin
->sin_addr
) + 1;
2400 hostport
= XINT (p
->contents
[--len
]);
2401 sin
->sin_port
= htons (hostport
);
2402 cp
= (unsigned char *)&sin
->sin_addr
;
2403 sa
->sa_family
= family
;
2406 else if (family
== AF_INET6
)
2408 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*) sa
;
2409 uint16_t *ip6
= (uint16_t *)&sin6
->sin6_addr
;
2410 len
= sizeof (sin6
->sin6_addr
) / 2 + 1;
2411 hostport
= XINT (p
->contents
[--len
]);
2412 sin6
->sin6_port
= htons (hostport
);
2413 for (i
= 0; i
< len
; i
++)
2414 if (INTEGERP (p
->contents
[i
]))
2416 int j
= XFASTINT (p
->contents
[i
]) & 0xffff;
2419 sa
->sa_family
= family
;
2426 else if (STRINGP (address
))
2428 #ifdef HAVE_LOCAL_SOCKETS
2429 if (family
== AF_LOCAL
)
2431 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2432 cp
= SDATA (address
);
2433 for (i
= 0; i
< sizeof (sockun
->sun_path
) && *cp
; i
++)
2434 sockun
->sun_path
[i
] = *cp
++;
2435 sa
->sa_family
= family
;
2442 p
= XVECTOR (XCDR (address
));
2443 cp
= (unsigned char *)sa
+ sizeof (sa
->sa_family
);
2446 for (i
= 0; i
< len
; i
++)
2447 if (INTEGERP (p
->contents
[i
]))
2448 *cp
++ = XFASTINT (p
->contents
[i
]) & 0xff;
2451 #ifdef DATAGRAM_SOCKETS
2452 DEFUN ("process-datagram-address", Fprocess_datagram_address
, Sprocess_datagram_address
,
2454 doc
: /* Get the current datagram address associated with PROCESS.
2455 If PROCESS is a non-blocking network process that hasn't been fully
2456 set up yet, this function will block until socket setup has completed. */)
2457 (Lisp_Object process
)
2461 CHECK_PROCESS (process
);
2463 if (NETCONN_P (process
))
2464 wait_for_socket_fds (process
, "process-datagram-address");
2466 if (!DATAGRAM_CONN_P (process
))
2469 channel
= XPROCESS (process
)->infd
;
2470 return conv_sockaddr_to_lisp (datagram_address
[channel
].sa
,
2471 datagram_address
[channel
].len
);
2474 DEFUN ("set-process-datagram-address", Fset_process_datagram_address
, Sset_process_datagram_address
,
2476 doc
: /* Set the datagram address for PROCESS to ADDRESS.
2477 Returns nil upon error setting address, ADDRESS otherwise.
2479 If PROCESS is a non-blocking network process that hasn't been fully
2480 set up yet, this function will block until socket setup has completed. */)
2481 (Lisp_Object process
, Lisp_Object address
)
2486 CHECK_PROCESS (process
);
2488 if (NETCONN_P (process
))
2489 wait_for_socket_fds (process
, "set-process-datagram-address");
2491 if (!DATAGRAM_CONN_P (process
))
2494 channel
= XPROCESS (process
)->infd
;
2496 len
= get_lisp_to_sockaddr_size (address
, &family
);
2497 if (len
== 0 || datagram_address
[channel
].len
!= len
)
2499 conv_lisp_to_sockaddr (family
, address
, datagram_address
[channel
].sa
, len
);
2505 static const struct socket_options
{
2506 /* The name of this option. Should be lowercase version of option
2507 name without SO_ prefix. */
2509 /* Option level SOL_... */
2511 /* Option number SO_... */
2513 enum { SOPT_UNKNOWN
, SOPT_BOOL
, SOPT_INT
, SOPT_IFNAME
, SOPT_LINGER
} opttype
;
2514 enum { OPIX_NONE
= 0, OPIX_MISC
= 1, OPIX_REUSEADDR
= 2 } optbit
;
2515 } socket_options
[] =
2517 #ifdef SO_BINDTODEVICE
2518 { ":bindtodevice", SOL_SOCKET
, SO_BINDTODEVICE
, SOPT_IFNAME
, OPIX_MISC
},
2521 { ":broadcast", SOL_SOCKET
, SO_BROADCAST
, SOPT_BOOL
, OPIX_MISC
},
2524 { ":dontroute", SOL_SOCKET
, SO_DONTROUTE
, SOPT_BOOL
, OPIX_MISC
},
2527 { ":keepalive", SOL_SOCKET
, SO_KEEPALIVE
, SOPT_BOOL
, OPIX_MISC
},
2530 { ":linger", SOL_SOCKET
, SO_LINGER
, SOPT_LINGER
, OPIX_MISC
},
2533 { ":oobinline", SOL_SOCKET
, SO_OOBINLINE
, SOPT_BOOL
, OPIX_MISC
},
2536 { ":priority", SOL_SOCKET
, SO_PRIORITY
, SOPT_INT
, OPIX_MISC
},
2539 { ":reuseaddr", SOL_SOCKET
, SO_REUSEADDR
, SOPT_BOOL
, OPIX_REUSEADDR
},
2541 { 0, 0, 0, SOPT_UNKNOWN
, OPIX_NONE
}
2544 /* Set option OPT to value VAL on socket S.
2546 Returns (1<<socket_options[OPT].optbit) if option is known, 0 otherwise.
2547 Signals an error if setting a known option fails.
2551 set_socket_option (int s
, Lisp_Object opt
, Lisp_Object val
)
2554 const struct socket_options
*sopt
;
2559 name
= SSDATA (SYMBOL_NAME (opt
));
2560 for (sopt
= socket_options
; sopt
->name
; sopt
++)
2561 if (strcmp (name
, sopt
->name
) == 0)
2564 switch (sopt
->opttype
)
2569 optval
= NILP (val
) ? 0 : 1;
2570 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2571 &optval
, sizeof (optval
));
2578 if (TYPE_RANGED_INTEGERP (int, val
))
2579 optval
= XINT (val
);
2581 error ("Bad option value for %s", name
);
2582 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2583 &optval
, sizeof (optval
));
2587 #ifdef SO_BINDTODEVICE
2590 char devname
[IFNAMSIZ
+ 1];
2592 /* This is broken, at least in the Linux 2.4 kernel.
2593 To unbind, the arg must be a zero integer, not the empty string.
2594 This should work on all systems. KFS. 2003-09-23. */
2595 memset (devname
, 0, sizeof devname
);
2598 char *arg
= SSDATA (val
);
2599 int len
= min (strlen (arg
), IFNAMSIZ
);
2600 memcpy (devname
, arg
, len
);
2602 else if (!NILP (val
))
2603 error ("Bad option value for %s", name
);
2604 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2613 struct linger linger
;
2616 linger
.l_linger
= 0;
2617 if (TYPE_RANGED_INTEGERP (int, val
))
2618 linger
.l_linger
= XINT (val
);
2620 linger
.l_onoff
= NILP (val
) ? 0 : 1;
2621 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2622 &linger
, sizeof (linger
));
2633 int setsockopt_errno
= errno
;
2634 report_file_errno ("Cannot set network option", list2 (opt
, val
),
2638 return (1 << sopt
->optbit
);
2642 DEFUN ("set-network-process-option",
2643 Fset_network_process_option
, Sset_network_process_option
,
2645 doc
: /* For network process PROCESS set option OPTION to value VALUE.
2646 See `make-network-process' for a list of options and values.
2647 If optional fourth arg NO-ERROR is non-nil, don't signal an error if
2648 OPTION is not a supported option, return nil instead; otherwise return t.
2650 If PROCESS is a non-blocking network process that hasn't been fully
2651 set up yet, this function will block until socket setup has completed. */)
2652 (Lisp_Object process
, Lisp_Object option
, Lisp_Object value
, Lisp_Object no_error
)
2655 struct Lisp_Process
*p
;
2657 CHECK_PROCESS (process
);
2658 p
= XPROCESS (process
);
2659 if (!NETCONN1_P (p
))
2660 error ("Process is not a network process");
2662 wait_for_socket_fds (process
, "set-network-process-option");
2666 error ("Process is not running");
2668 if (set_socket_option (s
, option
, value
))
2670 pset_childp (p
, Fplist_put (p
->childp
, option
, value
));
2674 if (NILP (no_error
))
2675 error ("Unknown or unsupported option");
2681 DEFUN ("serial-process-configure",
2682 Fserial_process_configure
,
2683 Sserial_process_configure
,
2685 doc
: /* Configure speed, bytesize, etc. of a serial process.
2687 Arguments are specified as keyword/argument pairs. Attributes that
2688 are not given are re-initialized from the process's current
2689 configuration (available via the function `process-contact') or set to
2690 reasonable default values. The following arguments are defined:
2696 -- Any of these arguments can be given to identify the process that is
2697 to be configured. If none of these arguments is given, the current
2698 buffer's process is used.
2700 :speed SPEED -- SPEED is the speed of the serial port in bits per
2701 second, also called baud rate. Any value can be given for SPEED, but
2702 most serial ports work only at a few defined values between 1200 and
2703 115200, with 9600 being the most common value. If SPEED is nil, the
2704 serial port is not configured any further, i.e., all other arguments
2705 are ignored. This may be useful for special serial ports such as
2706 Bluetooth-to-serial converters which can only be configured through AT
2707 commands. A value of nil for SPEED can be used only when passed
2708 through `make-serial-process' or `serial-term'.
2710 :bytesize BYTESIZE -- BYTESIZE is the number of bits per byte, which
2711 can be 7 or 8. If BYTESIZE is not given or nil, a value of 8 is used.
2713 :parity PARITY -- PARITY can be nil (don't use parity), the symbol
2714 `odd' (use odd parity), or the symbol `even' (use even parity). If
2715 PARITY is not given, no parity is used.
2717 :stopbits STOPBITS -- STOPBITS is the number of stopbits used to
2718 terminate a byte transmission. STOPBITS can be 1 or 2. If STOPBITS
2719 is not given or nil, 1 stopbit is used.
2721 :flowcontrol FLOWCONTROL -- FLOWCONTROL determines the type of
2722 flowcontrol to be used, which is either nil (don't use flowcontrol),
2723 the symbol `hw' (use RTS/CTS hardware flowcontrol), or the symbol `sw'
2724 (use XON/XOFF software flowcontrol). If FLOWCONTROL is not given, no
2725 flowcontrol is used.
2727 `serial-process-configure' is called by `make-serial-process' for the
2728 initial configuration of the serial port.
2732 (serial-process-configure :process "/dev/ttyS0" :speed 1200)
2734 (serial-process-configure
2735 :buffer "COM1" :stopbits 1 :parity \\='odd :flowcontrol \\='hw)
2737 (serial-process-configure :port "\\\\.\\COM13" :bytesize 7)
2739 usage: (serial-process-configure &rest ARGS) */)
2740 (ptrdiff_t nargs
, Lisp_Object
*args
)
2742 struct Lisp_Process
*p
;
2743 Lisp_Object contact
= Qnil
;
2744 Lisp_Object proc
= Qnil
;
2746 contact
= Flist (nargs
, args
);
2748 proc
= Fplist_get (contact
, QCprocess
);
2750 proc
= Fplist_get (contact
, QCname
);
2752 proc
= Fplist_get (contact
, QCbuffer
);
2754 proc
= Fplist_get (contact
, QCport
);
2755 proc
= get_process (proc
);
2756 p
= XPROCESS (proc
);
2757 if (!EQ (p
->type
, Qserial
))
2758 error ("Not a serial process");
2760 if (NILP (Fplist_get (p
->childp
, QCspeed
)))
2763 serial_configure (p
, contact
);
2767 DEFUN ("make-serial-process", Fmake_serial_process
, Smake_serial_process
,
2769 doc
: /* Create and return a serial port process.
2771 In Emacs, serial port connections are represented by process objects,
2772 so input and output work as for subprocesses, and `delete-process'
2773 closes a serial port connection. However, a serial process has no
2774 process id, it cannot be signaled, and the status codes are different
2775 from normal processes.
2777 `make-serial-process' creates a process and a buffer, on which you
2778 probably want to use `process-send-string'. Try \\[serial-term] for
2779 an interactive terminal. See below for examples.
2781 Arguments are specified as keyword/argument pairs. The following
2782 arguments are defined:
2784 :port PORT -- (mandatory) PORT is the path or name of the serial port.
2785 For example, this could be "/dev/ttyS0" on Unix. On Windows, this
2786 could be "COM1", or "\\\\.\\COM10" for ports higher than COM9 (double
2787 the backslashes in strings).
2789 :speed SPEED -- (mandatory) is handled by `serial-process-configure',
2790 which this function calls.
2792 :name NAME -- NAME is the name of the process. If NAME is not given,
2793 the value of PORT is used.
2795 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
2796 with the process. Process output goes at the end of that buffer,
2797 unless you specify an output stream or filter function to handle the
2798 output. If BUFFER is not given, the value of NAME is used.
2800 :coding CODING -- If CODING is a symbol, it specifies the coding
2801 system used for both reading and writing for this process. If CODING
2802 is a cons (DECODING . ENCODING), DECODING is used for reading, and
2803 ENCODING is used for writing.
2805 :noquery BOOL -- When exiting Emacs, query the user if BOOL is nil and
2806 the process is running. If BOOL is not given, query before exiting.
2808 :stop BOOL -- Start process in the `stopped' state if BOOL is non-nil.
2809 In the stopped state, a serial process does not accept incoming data,
2810 but you can send outgoing data. The stopped state is cleared by
2811 `continue-process' and set by `stop-process'.
2813 :filter FILTER -- Install FILTER as the process filter.
2815 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
2817 :plist PLIST -- Install PLIST as the initial plist of the process.
2823 -- This function calls `serial-process-configure' to handle these
2826 The original argument list, possibly modified by later configuration,
2827 is available via the function `process-contact'.
2831 (make-serial-process :port "/dev/ttyS0" :speed 9600)
2833 (make-serial-process :port "COM1" :speed 115200 :stopbits 2)
2835 (make-serial-process :port "\\\\.\\COM13" :speed 1200 :bytesize 7 :parity \\='odd)
2837 (make-serial-process :port "/dev/tty.BlueConsole-SPP-1" :speed nil)
2839 usage: (make-serial-process &rest ARGS) */)
2840 (ptrdiff_t nargs
, Lisp_Object
*args
)
2843 Lisp_Object proc
, contact
, port
;
2844 struct Lisp_Process
*p
;
2845 Lisp_Object name
, buffer
;
2846 Lisp_Object tem
, val
;
2847 ptrdiff_t specpdl_count
;
2852 contact
= Flist (nargs
, args
);
2854 port
= Fplist_get (contact
, QCport
);
2856 error ("No port specified");
2857 CHECK_STRING (port
);
2859 if (NILP (Fplist_member (contact
, QCspeed
)))
2860 error (":speed not specified");
2861 if (!NILP (Fplist_get (contact
, QCspeed
)))
2862 CHECK_NUMBER (Fplist_get (contact
, QCspeed
));
2864 name
= Fplist_get (contact
, QCname
);
2867 CHECK_STRING (name
);
2868 proc
= make_process (name
);
2869 specpdl_count
= SPECPDL_INDEX ();
2870 record_unwind_protect (remove_process
, proc
);
2871 p
= XPROCESS (proc
);
2873 fd
= serial_open (port
);
2874 p
->open_fd
[SUBPROCESS_STDIN
] = fd
;
2877 if (fd
> max_process_desc
)
2878 max_process_desc
= fd
;
2879 chan_process
[fd
] = proc
;
2881 buffer
= Fplist_get (contact
, QCbuffer
);
2884 buffer
= Fget_buffer_create (buffer
);
2885 pset_buffer (p
, buffer
);
2887 pset_childp (p
, contact
);
2888 pset_plist (p
, Fcopy_sequence (Fplist_get (contact
, QCplist
)));
2889 pset_type (p
, Qserial
);
2890 pset_sentinel (p
, Fplist_get (contact
, QCsentinel
));
2891 pset_filter (p
, Fplist_get (contact
, QCfilter
));
2893 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
2894 p
->kill_without_query
= 1;
2895 if (tem
= Fplist_get (contact
, QCstop
), !NILP (tem
))
2896 pset_command (p
, Qt
);
2897 eassert (! p
->pty_flag
);
2899 if (!EQ (p
->command
, Qt
))
2901 FD_SET (fd
, &input_wait_mask
);
2902 FD_SET (fd
, &non_keyboard_wait_mask
);
2905 if (BUFFERP (buffer
))
2907 set_marker_both (p
->mark
, buffer
,
2908 BUF_ZV (XBUFFER (buffer
)),
2909 BUF_ZV_BYTE (XBUFFER (buffer
)));
2912 tem
= Fplist_member (contact
, QCcoding
);
2913 if (!NILP (tem
) && (!CONSP (tem
) || !CONSP (XCDR (tem
))))
2919 val
= XCAR (XCDR (tem
));
2923 else if (!NILP (Vcoding_system_for_read
))
2924 val
= Vcoding_system_for_read
;
2925 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
2926 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
2928 pset_decode_coding_system (p
, val
);
2933 val
= XCAR (XCDR (tem
));
2937 else if (!NILP (Vcoding_system_for_write
))
2938 val
= Vcoding_system_for_write
;
2939 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
2940 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
2942 pset_encode_coding_system (p
, val
);
2944 setup_process_coding_systems (proc
);
2945 pset_decoding_buf (p
, empty_unibyte_string
);
2946 p
->decoding_carryover
= 0;
2947 pset_encoding_buf (p
, empty_unibyte_string
);
2948 p
->inherit_coding_system_flag
2949 = !(!NILP (tem
) || NILP (buffer
) || !inherit_process_coding_system
);
2951 Fserial_process_configure (nargs
, args
);
2953 specpdl_ptr
= specpdl
+ specpdl_count
;
2958 void set_network_socket_coding_system (Lisp_Object proc
,
2960 Lisp_Object service
,
2964 struct Lisp_Process
*p
= XPROCESS (proc
);
2965 Lisp_Object contact
= p
->childp
;
2966 Lisp_Object coding_systems
= Qt
;
2969 tem
= Fplist_member (contact
, QCcoding
);
2970 if (!NILP (tem
) && (!CONSP (tem
) || !CONSP (XCDR (tem
))))
2971 tem
= Qnil
; /* No error message (too late!). */
2973 /* Setup coding systems for communicating with the network stream. */
2974 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
2978 val
= XCAR (XCDR (tem
));
2982 else if (!NILP (Vcoding_system_for_read
))
2983 val
= Vcoding_system_for_read
;
2984 else if ((!NILP (p
->buffer
) &&
2985 NILP (BVAR (XBUFFER (p
->buffer
), enable_multibyte_characters
)))
2986 || (NILP (p
->buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
2987 /* We dare not decode end-of-line format by setting VAL to
2988 Qraw_text, because the existing Emacs Lisp libraries
2989 assume that they receive bare code including a sequence of
2994 if (NILP (host
) || NILP (service
))
2995 coding_systems
= Qnil
;
2997 coding_systems
= CALLN (Ffind_operation_coding_system
,
2998 Qopen_network_stream
, name
, p
->buffer
,
3000 if (CONSP (coding_systems
))
3001 val
= XCAR (coding_systems
);
3002 else if (CONSP (Vdefault_process_coding_system
))
3003 val
= XCAR (Vdefault_process_coding_system
);
3007 pset_decode_coding_system (p
, val
);
3011 val
= XCAR (XCDR (tem
));
3015 else if (!NILP (Vcoding_system_for_write
))
3016 val
= Vcoding_system_for_write
;
3017 else if (NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
3021 if (EQ (coding_systems
, Qt
))
3023 if (NILP (host
) || NILP (service
))
3024 coding_systems
= Qnil
;
3026 coding_systems
= CALLN (Ffind_operation_coding_system
,
3027 Qopen_network_stream
, name
, p
->buffer
,
3030 if (CONSP (coding_systems
))
3031 val
= XCDR (coding_systems
);
3032 else if (CONSP (Vdefault_process_coding_system
))
3033 val
= XCDR (Vdefault_process_coding_system
);
3037 pset_encode_coding_system (p
, val
);
3039 pset_decoding_buf (p
, empty_unibyte_string
);
3040 p
->decoding_carryover
= 0;
3041 pset_encoding_buf (p
, empty_unibyte_string
);
3043 p
->inherit_coding_system_flag
3044 = !(!NILP (tem
) || NILP (p
->buffer
) || !inherit_process_coding_system
);
3049 finish_after_tls_connection (Lisp_Object proc
)
3051 struct Lisp_Process
*p
= XPROCESS (proc
);
3052 Lisp_Object contact
= p
->childp
;
3053 Lisp_Object result
= Qt
;
3055 if (!NILP (Ffboundp (Qnsm_verify_connection
)))
3056 result
= call3 (Qnsm_verify_connection
,
3058 Fplist_get (contact
, QChost
),
3059 Fplist_get (contact
, QCservice
));
3063 pset_status (p
, list2 (Qfailed
,
3064 build_string ("The Network Security Manager stopped the connections")));
3065 deactivate_process (proc
);
3069 /* If we cleared the connection wait mask before we did
3070 the TLS setup, then we have to say that the process
3071 is finally "open" here. */
3072 if (! FD_ISSET (p
->outfd
, &connect_wait_mask
))
3074 pset_status (p
, Qrun
);
3075 /* Execute the sentinel here. If we had relied on
3076 status_notify to do it later, it will read input
3077 from the process before calling the sentinel. */
3078 exec_sentinel (proc
, build_string ("open\n"));
3085 connect_network_socket (Lisp_Object proc
, Lisp_Object ip_addresses
)
3087 ptrdiff_t count
= SPECPDL_INDEX ();
3089 int s
= -1, outch
, inch
;
3091 Lisp_Object ip_address
;
3093 struct sockaddr
*sa
= NULL
;
3096 struct Lisp_Process
*p
= XPROCESS (proc
);
3097 Lisp_Object contact
= p
->childp
;
3100 /* Do this in case we never enter the while-loop below. */
3101 count1
= SPECPDL_INDEX ();
3104 while (!NILP (ip_addresses
))
3106 ip_address
= XCAR (ip_addresses
);
3107 ip_addresses
= XCDR (ip_addresses
);
3113 addrlen
= get_lisp_to_sockaddr_size (ip_address
, &family
);
3116 sa
= xmalloc (addrlen
);
3117 conv_lisp_to_sockaddr (family
, ip_address
, sa
, addrlen
);
3119 s
= socket (family
, p
->socktype
| SOCK_CLOEXEC
, p
->ai_protocol
);
3126 #ifdef DATAGRAM_SOCKETS
3127 if (!p
->is_server
&& p
->socktype
== SOCK_DGRAM
)
3129 #endif /* DATAGRAM_SOCKETS */
3131 #ifdef NON_BLOCKING_CONNECT
3132 if (p
->is_non_blocking_client
)
3134 ret
= fcntl (s
, F_SETFL
, O_NONBLOCK
);
3145 /* Make us close S if quit. */
3146 record_unwind_protect_int (close_file_unwind
, s
);
3148 /* Parse network options in the arg list. We simply ignore anything
3149 which isn't a known option (including other keywords). An error
3150 is signaled if setting a known option fails. */
3152 Lisp_Object params
= contact
, key
, val
;
3154 while (!NILP (params
))
3156 key
= XCAR (params
);
3157 params
= XCDR (params
);
3158 val
= XCAR (params
);
3159 params
= XCDR (params
);
3160 optbits
|= set_socket_option (s
, key
, val
);
3166 /* Configure as a server socket. */
3168 /* SO_REUSEADDR = 1 is default for server sockets; must specify
3169 explicit :reuseaddr key to override this. */
3170 #ifdef HAVE_LOCAL_SOCKETS
3171 if (family
!= AF_LOCAL
)
3173 if (!(optbits
& (1 << OPIX_REUSEADDR
)))
3176 if (setsockopt (s
, SOL_SOCKET
, SO_REUSEADDR
, &optval
, sizeof optval
))
3177 report_file_error ("Cannot set reuse option on server socket", Qnil
);
3180 if (bind (s
, sa
, addrlen
))
3181 report_file_error ("Cannot bind server socket", Qnil
);
3183 #ifdef HAVE_GETSOCKNAME
3186 struct sockaddr_in sa1
;
3187 socklen_t len1
= sizeof (sa1
);
3188 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3190 Lisp_Object service
;
3191 service
= make_number (ntohs (sa1
.sin_port
));
3192 contact
= Fplist_put (contact
, QCservice
, service
);
3193 // Save the port number so that we can stash it in
3194 // the process object later.
3195 ((struct sockaddr_in
*)sa
)->sin_port
= sa1
.sin_port
;
3200 if (p
->socktype
!= SOCK_DGRAM
&& listen (s
, p
->backlog
))
3201 report_file_error ("Cannot listen on server socket", Qnil
);
3209 ret
= connect (s
, sa
, addrlen
);
3212 if (ret
== 0 || xerrno
== EISCONN
)
3214 /* The unwind-protect will be discarded afterwards.
3215 Likewise for immediate_quit. */
3219 #ifdef NON_BLOCKING_CONNECT
3221 if (p
->is_non_blocking_client
&& xerrno
== EINPROGRESS
)
3225 if (p
->is_non_blocking_client
&& xerrno
== EWOULDBLOCK
)
3232 if (xerrno
== EINTR
)
3234 /* Unlike most other syscalls connect() cannot be called
3235 again. (That would return EALREADY.) The proper way to
3236 wait for completion is pselect(). */
3244 sc
= pselect (s
+ 1, NULL
, &fdset
, NULL
, NULL
, NULL
);
3250 report_file_error ("Failed select", Qnil
);
3254 len
= sizeof xerrno
;
3255 eassert (FD_ISSET (s
, &fdset
));
3256 if (getsockopt (s
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &len
) < 0)
3257 report_file_error ("Failed getsockopt", Qnil
);
3259 report_file_errno ("Failed connect", Qnil
, xerrno
);
3262 #endif /* !WINDOWSNT */
3266 /* Discard the unwind protect closing S. */
3267 specpdl_ptr
= specpdl
+ count1
;
3272 if (xerrno
== EINTR
)
3279 #ifdef DATAGRAM_SOCKETS
3280 if (p
->socktype
== SOCK_DGRAM
)
3282 if (datagram_address
[s
].sa
)
3285 datagram_address
[s
].sa
= xmalloc (addrlen
);
3286 datagram_address
[s
].len
= addrlen
;
3290 memset (datagram_address
[s
].sa
, 0, addrlen
);
3291 if (remote
= Fplist_get (contact
, QCremote
), !NILP (remote
))
3294 rlen
= get_lisp_to_sockaddr_size (remote
, &rfamily
);
3295 if (rlen
!= 0 && rfamily
== family
3297 conv_lisp_to_sockaddr (rfamily
, remote
,
3298 datagram_address
[s
].sa
, rlen
);
3302 memcpy (datagram_address
[s
].sa
, sa
, addrlen
);
3306 contact
= Fplist_put (contact
, p
->is_server
? QClocal
: QCremote
,
3307 conv_sockaddr_to_lisp (sa
, addrlen
));
3308 #ifdef HAVE_GETSOCKNAME
3311 struct sockaddr_in sa1
;
3312 socklen_t len1
= sizeof (sa1
);
3313 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3314 contact
= Fplist_put (contact
, QClocal
,
3315 conv_sockaddr_to_lisp ((struct sockaddr
*)&sa1
, len1
));
3324 /* If non-blocking got this far - and failed - assume non-blocking is
3325 not supported after all. This is probably a wrong assumption, but
3326 the normal blocking calls to open-network-stream handles this error
3328 if (p
->is_non_blocking_client
)
3331 report_file_errno ((p
->is_server
3332 ? "make server process failed"
3333 : "make client process failed"),
3340 chan_process
[inch
] = proc
;
3342 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
3344 p
= XPROCESS (proc
);
3345 p
->open_fd
[SUBPROCESS_STDIN
] = inch
;
3349 /* Discard the unwind protect for closing S, if any. */
3350 specpdl_ptr
= specpdl
+ count1
;
3352 /* Unwind bind_polling_period and request_sigio. */
3353 unbind_to (count
, Qnil
);
3355 if (p
->is_server
&& p
->socktype
!= SOCK_DGRAM
)
3356 pset_status (p
, Qlisten
);
3358 /* Make the process marker point into the process buffer (if any). */
3359 if (BUFFERP (p
->buffer
))
3360 set_marker_both (p
->mark
, p
->buffer
,
3361 BUF_ZV (XBUFFER (p
->buffer
)),
3362 BUF_ZV_BYTE (XBUFFER (p
->buffer
)));
3364 #ifdef NON_BLOCKING_CONNECT
3365 if (p
->is_non_blocking_client
)
3367 /* We may get here if connect did succeed immediately. However,
3368 in that case, we still need to signal this like a non-blocking
3370 pset_status (p
, Qconnect
);
3371 if (!FD_ISSET (inch
, &connect_wait_mask
))
3373 FD_SET (inch
, &connect_wait_mask
);
3374 FD_SET (inch
, &write_mask
);
3375 num_pending_connects
++;
3380 /* A server may have a client filter setting of Qt, but it must
3381 still listen for incoming connects unless it is stopped. */
3382 if ((!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
3383 || (EQ (p
->status
, Qlisten
) && NILP (p
->command
)))
3385 FD_SET (inch
, &input_wait_mask
);
3386 FD_SET (inch
, &non_keyboard_wait_mask
);
3389 if (inch
> max_process_desc
)
3390 max_process_desc
= inch
;
3392 /* Set up the masks based on the process filter. */
3393 set_process_filter_masks (p
);
3395 setup_process_coding_systems (proc
);
3398 /* Continue the asynchronous connection. */
3399 if (!NILP (p
->gnutls_boot_parameters
))
3401 Lisp_Object boot
, params
= p
->gnutls_boot_parameters
;
3403 boot
= Fgnutls_boot (proc
, XCAR (params
), XCDR (params
));
3404 p
->gnutls_boot_parameters
= Qnil
;
3406 if (p
->gnutls_initstage
== GNUTLS_STAGE_READY
)
3407 /* Run sentinels, etc. */
3408 finish_after_tls_connection (proc
);
3409 else if (p
->gnutls_initstage
!= GNUTLS_STAGE_HANDSHAKE_TRIED
)
3411 deactivate_process (proc
);
3413 pset_status (p
, list2 (Qfailed
,
3414 build_string ("TLS negotiation failed")));
3416 pset_status (p
, list2 (Qfailed
, boot
));
3423 #ifndef HAVE_GETADDRINFO
3425 conv_numerical_to_lisp (unsigned char *number
, unsigned int length
, int port
)
3427 Lisp_Object address
= Fmake_vector (make_number (length
+ 1), Qnil
);
3428 register struct Lisp_Vector
*p
= XVECTOR (address
);
3431 p
->contents
[length
] = make_number (port
);
3432 for (i
= 0; i
< length
; i
++)
3433 p
->contents
[i
] = make_number (*(number
+ i
));
3439 /* Create a network stream/datagram client/server process. Treated
3440 exactly like a normal process when reading and writing. Primary
3441 differences are in status display and process deletion. A network
3442 connection has no PID; you cannot signal it. All you can do is
3443 stop/continue it and deactivate/close it via delete-process. */
3445 DEFUN ("make-network-process", Fmake_network_process
, Smake_network_process
,
3447 doc
: /* Create and return a network server or client process.
3449 In Emacs, network connections are represented by process objects, so
3450 input and output work as for subprocesses and `delete-process' closes
3451 a network connection. However, a network process has no process id,
3452 it cannot be signaled, and the status codes are different from normal
3455 Arguments are specified as keyword/argument pairs. The following
3456 arguments are defined:
3458 :name NAME -- NAME is name for process. It is modified if necessary
3461 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
3462 with the process. Process output goes at end of that buffer, unless
3463 you specify an output stream or filter function to handle the output.
3464 BUFFER may be also nil, meaning that this process is not associated
3467 :host HOST -- HOST is name of the host to connect to, or its IP
3468 address. The symbol `local' specifies the local host. If specified
3469 for a server process, it must be a valid name or address for the local
3470 host, and only clients connecting to that address will be accepted.
3472 :service SERVICE -- SERVICE is name of the service desired, or an
3473 integer specifying a port number to connect to. If SERVICE is t,
3474 a random port number is selected for the server. (If Emacs was
3475 compiled with getaddrinfo, a port number can also be specified as a
3476 string, e.g. "80", as well as an integer. This is not portable.)
3478 :type TYPE -- TYPE is the type of connection. The default (nil) is a
3479 stream type connection, `datagram' creates a datagram type connection,
3480 `seqpacket' creates a reliable datagram connection.
3482 :family FAMILY -- FAMILY is the address (and protocol) family for the
3483 service specified by HOST and SERVICE. The default (nil) is to use
3484 whatever address family (IPv4 or IPv6) that is defined for the host
3485 and port number specified by HOST and SERVICE. Other address families
3487 local -- for a local (i.e. UNIX) address specified by SERVICE.
3488 ipv4 -- use IPv4 address family only.
3489 ipv6 -- use IPv6 address family only.
3491 :local ADDRESS -- ADDRESS is the local address used for the connection.
3492 This parameter is ignored when opening a client process. When specified
3493 for a server process, the FAMILY, HOST and SERVICE args are ignored.
3495 :remote ADDRESS -- ADDRESS is the remote partner's address for the
3496 connection. This parameter is ignored when opening a stream server
3497 process. For a datagram server process, it specifies the initial
3498 setting of the remote datagram address. When specified for a client
3499 process, the FAMILY, HOST, and SERVICE args are ignored.
3501 The format of ADDRESS depends on the address family:
3502 - An IPv4 address is represented as an vector of integers [A B C D P]
3503 corresponding to numeric IP address A.B.C.D and port number P.
3504 - A local address is represented as a string with the address in the
3505 local address space.
3506 - An "unsupported family" address is represented by a cons (F . AV)
3507 where F is the family number and AV is a vector containing the socket
3508 address data with one element per address data byte. Do not rely on
3509 this format in portable code, as it may depend on implementation
3510 defined constants, data sizes, and data structure alignment.
3512 :coding CODING -- If CODING is a symbol, it specifies the coding
3513 system used for both reading and writing for this process. If CODING
3514 is a cons (DECODING . ENCODING), DECODING is used for reading, and
3515 ENCODING is used for writing.
3517 :nowait BOOL -- If NOWAIT is non-nil for a stream type client
3518 process, return without waiting for the connection to complete;
3519 instead, the sentinel function will be called with second arg matching
3520 "open" (if successful) or "failed" when the connect completes.
3521 Default is to use a blocking connect (i.e. wait) for stream type
3524 :noquery BOOL -- Query the user unless BOOL is non-nil, and process is
3525 running when Emacs is exited.
3527 :stop BOOL -- Start process in the `stopped' state if BOOL non-nil.
3528 In the stopped state, a server process does not accept new
3529 connections, and a client process does not handle incoming traffic.
3530 The stopped state is cleared by `continue-process' and set by
3533 :filter FILTER -- Install FILTER as the process filter.
3535 :filter-multibyte BOOL -- If BOOL is non-nil, strings given to the
3536 process filter are multibyte, otherwise they are unibyte.
3537 If this keyword is not specified, the strings are multibyte if
3538 the default value of `enable-multibyte-characters' is non-nil.
3540 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
3542 :log LOG -- Install LOG as the server process log function. This
3543 function is called when the server accepts a network connection from a
3544 client. The arguments are SERVER, CLIENT, and MESSAGE, where SERVER
3545 is the server process, CLIENT is the new process for the connection,
3546 and MESSAGE is a string.
3548 :plist PLIST -- Install PLIST as the new process's initial plist.
3550 :tls-parameters LIST -- is a list that should be supplied if you're
3551 opening a TLS connection. The first element is the TLS type (either
3552 `gnutls-x509pki' or `gnutls-anon'), and the remaining elements should
3553 be a keyword list accepted by gnutls-boot (as returned by
3554 `gnutls-boot-parameters').
3556 :server QLEN -- if QLEN is non-nil, create a server process for the
3557 specified FAMILY, SERVICE, and connection type (stream or datagram).
3558 If QLEN is an integer, it is used as the max. length of the server's
3559 pending connection queue (also known as the backlog); the default
3560 queue length is 5. Default is to create a client process.
3562 The following network options can be specified for this connection:
3564 :broadcast BOOL -- Allow send and receive of datagram broadcasts.
3565 :dontroute BOOL -- Only send to directly connected hosts.
3566 :keepalive BOOL -- Send keep-alive messages on network stream.
3567 :linger BOOL or TIMEOUT -- Send queued messages before closing.
3568 :oobinline BOOL -- Place out-of-band data in receive data stream.
3569 :priority INT -- Set protocol defined priority for sent packets.
3570 :reuseaddr BOOL -- Allow reusing a recently used local address
3571 (this is allowed by default for a server process).
3572 :bindtodevice NAME -- bind to interface NAME. Using this may require
3573 special privileges on some systems.
3575 Consult the relevant system programmer's manual pages for more
3576 information on using these options.
3579 A server process will listen for and accept connections from clients.
3580 When a client connection is accepted, a new network process is created
3581 for the connection with the following parameters:
3583 - The client's process name is constructed by concatenating the server
3584 process's NAME and a client identification string.
3585 - If the FILTER argument is non-nil, the client process will not get a
3586 separate process buffer; otherwise, the client's process buffer is a newly
3587 created buffer named after the server process's BUFFER name or process
3588 NAME concatenated with the client identification string.
3589 - The connection type and the process filter and sentinel parameters are
3590 inherited from the server process's TYPE, FILTER and SENTINEL.
3591 - The client process's contact info is set according to the client's
3592 addressing information (typically an IP address and a port number).
3593 - The client process's plist is initialized from the server's plist.
3595 Notice that the FILTER and SENTINEL args are never used directly by
3596 the server process. Also, the BUFFER argument is not used directly by
3597 the server process, but via the optional :log function, accepted (and
3598 failed) connections may be logged in the server process's buffer.
3600 The original argument list, modified with the actual connection
3601 information, is available via the `process-contact' function.
3603 usage: (make-network-process &rest ARGS) */)
3604 (ptrdiff_t nargs
, Lisp_Object
*args
)
3607 Lisp_Object contact
;
3608 struct Lisp_Process
*p
;
3609 #if defined(HAVE_GETADDRINFO) || defined(HAVE_GETADDRINFO_A)
3610 struct addrinfo
*hints
;
3611 const char *portstring
;
3614 #ifdef HAVE_LOCAL_SOCKETS
3615 struct sockaddr_un address_un
;
3619 Lisp_Object name
, buffer
, host
, service
, address
;
3620 Lisp_Object filter
, sentinel
;
3621 Lisp_Object ip_addresses
= Qnil
;
3624 int ai_protocol
= 0;
3625 #ifdef HAVE_GETADDRINFO_A
3626 struct gaicb
**dns_requests
= NULL
;
3628 ptrdiff_t count
= SPECPDL_INDEX ();
3633 /* Save arguments for process-contact and clone-process. */
3634 contact
= Flist (nargs
, args
);
3637 /* Ensure socket support is loaded if available. */
3638 init_winsock (TRUE
);
3641 /* :type TYPE (nil: stream, datagram */
3642 tem
= Fplist_get (contact
, QCtype
);
3644 socktype
= SOCK_STREAM
;
3645 #ifdef DATAGRAM_SOCKETS
3646 else if (EQ (tem
, Qdatagram
))
3647 socktype
= SOCK_DGRAM
;
3649 #ifdef HAVE_SEQPACKET
3650 else if (EQ (tem
, Qseqpacket
))
3651 socktype
= SOCK_SEQPACKET
;
3654 error ("Unsupported connection type");
3656 name
= Fplist_get (contact
, QCname
);
3657 buffer
= Fplist_get (contact
, QCbuffer
);
3658 filter
= Fplist_get (contact
, QCfilter
);
3659 sentinel
= Fplist_get (contact
, QCsentinel
);
3661 CHECK_STRING (name
);
3663 /* :local ADDRESS or :remote ADDRESS */
3664 tem
= Fplist_get (contact
, QCserver
);
3666 address
= Fplist_get (contact
, QCremote
);
3668 address
= Fplist_get (contact
, QClocal
);
3669 if (!NILP (address
))
3671 host
= service
= Qnil
;
3673 if (!get_lisp_to_sockaddr_size (address
, &family
))
3674 error ("Malformed :address");
3676 ip_addresses
= Fcons (address
, Qnil
);
3680 /* :family FAMILY -- nil (for Inet), local, or integer. */
3681 tem
= Fplist_get (contact
, QCfamily
);
3684 #if defined (HAVE_GETADDRINFO) && defined (AF_INET6)
3690 #ifdef HAVE_LOCAL_SOCKETS
3691 else if (EQ (tem
, Qlocal
))
3695 else if (EQ (tem
, Qipv6
))
3698 else if (EQ (tem
, Qipv4
))
3700 else if (TYPE_RANGED_INTEGERP (int, tem
))
3701 family
= XINT (tem
);
3703 error ("Unknown address family");
3705 /* :service SERVICE -- string, integer (port number), or t (random port). */
3706 service
= Fplist_get (contact
, QCservice
);
3708 /* :host HOST -- hostname, ip address, or 'local for localhost. */
3709 host
= Fplist_get (contact
, QChost
);
3712 /* The "connection" function gets it bind info from the address we're
3713 given, so use this dummy address if nothing is specified. */
3714 #ifdef HAVE_LOCAL_SOCKETS
3715 if (family
!= AF_LOCAL
)
3717 host
= build_string ("127.0.0.1");
3721 if (EQ (host
, Qlocal
))
3722 /* Depending on setup, "localhost" may map to different IPv4 and/or
3723 IPv6 addresses, so it's better to be explicit (Bug#6781). */
3724 host
= build_string ("127.0.0.1");
3725 CHECK_STRING (host
);
3728 #ifdef HAVE_LOCAL_SOCKETS
3729 if (family
== AF_LOCAL
)
3733 message (":family local ignores the :host property");
3734 contact
= Fplist_put (contact
, QChost
, Qnil
);
3737 CHECK_STRING (service
);
3738 if (sizeof address_un
.sun_path
<= SBYTES (service
))
3739 error ("Service name too long");
3740 ip_addresses
= Fcons (service
, Qnil
);
3745 /* Slow down polling to every ten seconds.
3746 Some kernels have a bug which causes retrying connect to fail
3747 after a connect. Polling can interfere with gethostbyname too. */
3748 #ifdef POLL_FOR_INPUT
3749 if (socktype
!= SOCK_DGRAM
)
3751 record_unwind_protect_void (run_all_atimers
);
3752 bind_polling_period (10);
3756 #if defined (HAVE_GETADDRINFO) || defined (HAVE_GETADDRINFO_A)
3760 /* SERVICE can either be a string or int.
3761 Convert to a C string for later use by getaddrinfo. */
3762 if (EQ (service
, Qt
))
3764 else if (INTEGERP (service
))
3766 sprintf (portbuf
, "%"pI
"d", XINT (service
));
3767 portstring
= portbuf
;
3771 CHECK_STRING (service
);
3772 portstring
= SSDATA (service
);
3775 hints
= xzalloc (sizeof (struct addrinfo
));
3776 hints
->ai_flags
= 0;
3777 hints
->ai_family
= family
;
3778 hints
->ai_socktype
= socktype
;
3779 hints
->ai_protocol
= 0;
3784 #ifdef HAVE_GETADDRINFO_A
3785 if (!NILP (Fplist_get (contact
, QCnowait
)) &&
3790 printf("Async DNS for '%s'\n", SSDATA (host
));
3791 dns_requests
= xmalloc (sizeof (struct gaicb
*));
3792 dns_requests
[0] = xmalloc (sizeof (struct gaicb
));
3793 dns_requests
[0]->ar_name
= strdup (SSDATA (host
));
3794 dns_requests
[0]->ar_service
= strdup (portstring
);
3795 dns_requests
[0]->ar_request
= hints
;
3796 dns_requests
[0]->ar_result
= NULL
;
3798 ret
= getaddrinfo_a (GAI_NOWAIT
, dns_requests
, 1, NULL
);
3800 error ("%s/%s getaddrinfo_a error %d", SSDATA (host
), portstring
, ret
);
3804 #endif /* HAVE_GETADDRINFO_A */
3806 #ifdef HAVE_GETADDRINFO
3807 /* If we have a host, use getaddrinfo to resolve both host and service.
3808 Otherwise, use getservbyname to lookup the service. */
3812 struct addrinfo
*res
, *lres
;
3818 #ifdef HAVE_RES_INIT
3822 ret
= getaddrinfo (SSDATA (host
), portstring
, hints
, &res
);
3824 #ifdef HAVE_GAI_STRERROR
3825 error ("%s/%s %s", SSDATA (host
), portstring
, gai_strerror (ret
));
3827 error ("%s/%s getaddrinfo error %d", SSDATA (host
), portstring
, ret
);
3831 for (lres
= res
; lres
; lres
= lres
->ai_next
)
3833 ip_addresses
= Fcons (conv_sockaddr_to_lisp
3834 (lres
->ai_addr
, lres
->ai_addrlen
),
3836 ai_protocol
= lres
->ai_protocol
;
3839 ip_addresses
= Fnreverse (ip_addresses
);
3846 #endif /* HAVE_GETADDRINFO */
3848 /* We end up here if getaddrinfo is not defined, or in case no hostname
3849 has been specified (e.g. for a local server process). */
3851 if (EQ (service
, Qt
))
3853 else if (INTEGERP (service
))
3854 port
= (unsigned short) XINT (service
);
3857 struct servent
*svc_info
;
3858 CHECK_STRING (service
);
3859 svc_info
= getservbyname (SSDATA (service
),
3860 (socktype
== SOCK_DGRAM
? "udp" : "tcp"));
3862 error ("Unknown service: %s", SDATA (service
));
3863 port
= ntohs (svc_info
->s_port
);
3866 #ifndef HAVE_GETADDRINFO
3869 struct hostent
*host_info_ptr
;
3871 /* gethostbyname may fail with TRY_AGAIN, but we don't honor that,
3872 as it may `hang' Emacs for a very long time. */
3876 #ifdef HAVE_RES_INIT
3880 host_info_ptr
= gethostbyname ((const char *) SDATA (host
));
3885 ip_addresses
= Fcons (conv_numerical_to_lisp
3886 ((unsigned char *) host_info_ptr
->h_addr
,
3887 host_info_ptr
->h_length
,
3892 /* Attempt to interpret host as numeric inet address. This
3893 only works for IPv4 addresses. */
3895 unsigned long numeric_addr
= inet_addr (SSDATA (host
));
3897 if (numeric_addr
== -1)
3898 error ("Unknown host \"%s\"", SDATA (host
));
3900 ip_addresses
= Fcons (conv_numerical_to_lisp
3901 ((unsigned char *) &numeric_addr
, 4, port
),
3906 #endif /* not HAVE_GETADDRINFO */
3911 buffer
= Fget_buffer_create (buffer
);
3912 proc
= make_process (name
);
3913 p
= XPROCESS (proc
);
3914 pset_childp (p
, contact
);
3915 pset_plist (p
, Fcopy_sequence (Fplist_get (contact
, QCplist
)));
3916 pset_type (p
, Qnetwork
);
3918 pset_buffer (p
, buffer
);
3919 pset_sentinel (p
, sentinel
);
3920 pset_filter (p
, filter
);
3921 pset_log (p
, Fplist_get (contact
, QClog
));
3922 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
3923 p
->kill_without_query
= 1;
3924 if ((tem
= Fplist_get (contact
, QCstop
), !NILP (tem
)))
3925 pset_command (p
, Qt
);
3928 p
->is_non_blocking_client
= 0;
3931 p
->socktype
= socktype
;
3932 p
->ai_protocol
= ai_protocol
;
3933 #ifdef HAVE_GETADDRINFO_A
3934 p
->dns_requests
= NULL
;
3937 tem
= Fplist_get (contact
, QCtls_parameters
);
3939 p
->gnutls_boot_parameters
= tem
;
3942 set_network_socket_coding_system (proc
, service
, host
, name
);
3944 unbind_to (count
, Qnil
);
3947 tem
= Fplist_get (contact
, QCserver
);
3950 /* Don't support network sockets when non-blocking mode is
3951 not available, since a blocked Emacs is not useful. */
3953 if (TYPE_RANGED_INTEGERP (int, tem
))
3954 p
->backlog
= XINT (tem
);
3958 if (!p
->is_server
&& socktype
!= SOCK_DGRAM
3959 && (tem
= Fplist_get (contact
, QCnowait
), !NILP (tem
)))
3961 #ifndef NON_BLOCKING_CONNECT
3962 error ("Non-blocking connect not supported");
3964 p
->is_non_blocking_client
= 1;
3968 #ifdef HAVE_GETADDRINFO_A
3969 /* If we're doing async address resolution, the list of addresses
3970 here will be nil, so we postpone connecting to the server. */
3971 if (!p
->is_server
&& NILP (ip_addresses
))
3973 p
->dns_requests
= dns_requests
;
3974 p
->status
= Qconnect
;
3978 connect_network_socket (proc
, ip_addresses
);
3980 #else /* HAVE_GETADDRINFO_A */
3981 connect_network_socket (proc
, ip_addresses
);
3988 #ifdef HAVE_NET_IF_H
3992 network_interface_list (void)
3994 struct ifconf ifconf
;
3995 struct ifreq
*ifreq
;
3997 ptrdiff_t buf_size
= 512;
4002 s
= socket (AF_INET
, SOCK_STREAM
| SOCK_CLOEXEC
, 0);
4005 count
= SPECPDL_INDEX ();
4006 record_unwind_protect_int (close_file_unwind
, s
);
4010 buf
= xpalloc (buf
, &buf_size
, 1, INT_MAX
, 1);
4011 ifconf
.ifc_buf
= buf
;
4012 ifconf
.ifc_len
= buf_size
;
4013 if (ioctl (s
, SIOCGIFCONF
, &ifconf
))
4020 while (ifconf
.ifc_len
== buf_size
);
4022 res
= unbind_to (count
, Qnil
);
4023 ifreq
= ifconf
.ifc_req
;
4024 while ((char *) ifreq
< (char *) ifconf
.ifc_req
+ ifconf
.ifc_len
)
4026 struct ifreq
*ifq
= ifreq
;
4027 #ifdef HAVE_STRUCT_IFREQ_IFR_ADDR_SA_LEN
4028 #define SIZEOF_IFREQ(sif) \
4029 ((sif)->ifr_addr.sa_len < sizeof (struct sockaddr) \
4030 ? sizeof (*(sif)) : sizeof ((sif)->ifr_name) + (sif)->ifr_addr.sa_len)
4032 int len
= SIZEOF_IFREQ (ifq
);
4034 int len
= sizeof (*ifreq
);
4036 char namebuf
[sizeof (ifq
->ifr_name
) + 1];
4037 ifreq
= (struct ifreq
*) ((char *) ifreq
+ len
);
4039 if (ifq
->ifr_addr
.sa_family
!= AF_INET
)
4042 memcpy (namebuf
, ifq
->ifr_name
, sizeof (ifq
->ifr_name
));
4043 namebuf
[sizeof (ifq
->ifr_name
)] = 0;
4044 res
= Fcons (Fcons (build_string (namebuf
),
4045 conv_sockaddr_to_lisp (&ifq
->ifr_addr
,
4046 sizeof (struct sockaddr
))),
4053 #endif /* SIOCGIFCONF */
4055 #if defined (SIOCGIFADDR) || defined (SIOCGIFHWADDR) || defined (SIOCGIFFLAGS)
4059 const char *flag_sym
;
4062 static const struct ifflag_def ifflag_table
[] = {
4066 #ifdef IFF_BROADCAST
4067 { IFF_BROADCAST
, "broadcast" },
4070 { IFF_DEBUG
, "debug" },
4073 { IFF_LOOPBACK
, "loopback" },
4075 #ifdef IFF_POINTOPOINT
4076 { IFF_POINTOPOINT
, "pointopoint" },
4079 { IFF_RUNNING
, "running" },
4082 { IFF_NOARP
, "noarp" },
4085 { IFF_PROMISC
, "promisc" },
4087 #ifdef IFF_NOTRAILERS
4088 #ifdef NS_IMPL_COCOA
4089 /* Really means smart, notrailers is obsolete. */
4090 { IFF_NOTRAILERS
, "smart" },
4092 { IFF_NOTRAILERS
, "notrailers" },
4096 { IFF_ALLMULTI
, "allmulti" },
4099 { IFF_MASTER
, "master" },
4102 { IFF_SLAVE
, "slave" },
4104 #ifdef IFF_MULTICAST
4105 { IFF_MULTICAST
, "multicast" },
4108 { IFF_PORTSEL
, "portsel" },
4110 #ifdef IFF_AUTOMEDIA
4111 { IFF_AUTOMEDIA
, "automedia" },
4114 { IFF_DYNAMIC
, "dynamic" },
4117 { IFF_OACTIVE
, "oactive" }, /* OpenBSD: transmission in progress. */
4120 { IFF_SIMPLEX
, "simplex" }, /* OpenBSD: can't hear own transmissions. */
4123 { IFF_LINK0
, "link0" }, /* OpenBSD: per link layer defined bit. */
4126 { IFF_LINK1
, "link1" }, /* OpenBSD: per link layer defined bit. */
4129 { IFF_LINK2
, "link2" }, /* OpenBSD: per link layer defined bit. */
4135 network_interface_info (Lisp_Object ifname
)
4138 Lisp_Object res
= Qnil
;
4143 #if (! (defined SIOCGIFHWADDR && defined HAVE_STRUCT_IFREQ_IFR_HWADDR) \
4144 && defined HAVE_GETIFADDRS && defined LLADDR)
4145 struct ifaddrs
*ifap
;
4148 CHECK_STRING (ifname
);
4150 if (sizeof rq
.ifr_name
<= SBYTES (ifname
))
4151 error ("interface name too long");
4152 lispstpcpy (rq
.ifr_name
, ifname
);
4154 s
= socket (AF_INET
, SOCK_STREAM
| SOCK_CLOEXEC
, 0);
4157 count
= SPECPDL_INDEX ();
4158 record_unwind_protect_int (close_file_unwind
, s
);
4161 #if defined (SIOCGIFFLAGS) && defined (HAVE_STRUCT_IFREQ_IFR_FLAGS)
4162 if (ioctl (s
, SIOCGIFFLAGS
, &rq
) == 0)
4164 int flags
= rq
.ifr_flags
;
4165 const struct ifflag_def
*fp
;
4168 /* If flags is smaller than int (i.e. short) it may have the high bit set
4169 due to IFF_MULTICAST. In that case, sign extending it into
4171 if (flags
< 0 && sizeof (rq
.ifr_flags
) < sizeof (flags
))
4172 flags
= (unsigned short) rq
.ifr_flags
;
4175 for (fp
= ifflag_table
; flags
!= 0 && fp
->flag_sym
; fp
++)
4177 if (flags
& fp
->flag_bit
)
4179 elt
= Fcons (intern (fp
->flag_sym
), elt
);
4180 flags
-= fp
->flag_bit
;
4183 for (fnum
= 0; flags
&& fnum
< 32; flags
>>= 1, fnum
++)
4187 elt
= Fcons (make_number (fnum
), elt
);
4192 res
= Fcons (elt
, res
);
4195 #if defined (SIOCGIFHWADDR) && defined (HAVE_STRUCT_IFREQ_IFR_HWADDR)
4196 if (ioctl (s
, SIOCGIFHWADDR
, &rq
) == 0)
4198 Lisp_Object hwaddr
= Fmake_vector (make_number (6), Qnil
);
4199 register struct Lisp_Vector
*p
= XVECTOR (hwaddr
);
4203 for (n
= 0; n
< 6; n
++)
4204 p
->contents
[n
] = make_number (((unsigned char *)
4205 &rq
.ifr_hwaddr
.sa_data
[0])
4207 elt
= Fcons (make_number (rq
.ifr_hwaddr
.sa_family
), hwaddr
);
4209 #elif defined (HAVE_GETIFADDRS) && defined (LLADDR)
4210 if (getifaddrs (&ifap
) != -1)
4212 Lisp_Object hwaddr
= Fmake_vector (make_number (6), Qnil
);
4213 register struct Lisp_Vector
*p
= XVECTOR (hwaddr
);
4216 for (it
= ifap
; it
!= NULL
; it
= it
->ifa_next
)
4218 struct sockaddr_dl
*sdl
= (struct sockaddr_dl
*) it
->ifa_addr
;
4219 unsigned char linkaddr
[6];
4222 if (it
->ifa_addr
->sa_family
!= AF_LINK
4223 || strcmp (it
->ifa_name
, SSDATA (ifname
)) != 0
4224 || sdl
->sdl_alen
!= 6)
4227 memcpy (linkaddr
, LLADDR (sdl
), sdl
->sdl_alen
);
4228 for (n
= 0; n
< 6; n
++)
4229 p
->contents
[n
] = make_number (linkaddr
[n
]);
4231 elt
= Fcons (make_number (it
->ifa_addr
->sa_family
), hwaddr
);
4235 #ifdef HAVE_FREEIFADDRS
4239 #endif /* HAVE_GETIFADDRS && LLADDR */
4241 res
= Fcons (elt
, res
);
4244 #if defined (SIOCGIFNETMASK) && (defined (HAVE_STRUCT_IFREQ_IFR_NETMASK) || defined (HAVE_STRUCT_IFREQ_IFR_ADDR))
4245 if (ioctl (s
, SIOCGIFNETMASK
, &rq
) == 0)
4248 #ifdef HAVE_STRUCT_IFREQ_IFR_NETMASK
4249 elt
= conv_sockaddr_to_lisp (&rq
.ifr_netmask
, sizeof (rq
.ifr_netmask
));
4251 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
4255 res
= Fcons (elt
, res
);
4258 #if defined (SIOCGIFBRDADDR) && defined (HAVE_STRUCT_IFREQ_IFR_BROADADDR)
4259 if (ioctl (s
, SIOCGIFBRDADDR
, &rq
) == 0)
4262 elt
= conv_sockaddr_to_lisp (&rq
.ifr_broadaddr
, sizeof (rq
.ifr_broadaddr
));
4265 res
= Fcons (elt
, res
);
4268 #if defined (SIOCGIFADDR) && defined (HAVE_STRUCT_IFREQ_IFR_ADDR)
4269 if (ioctl (s
, SIOCGIFADDR
, &rq
) == 0)
4272 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
4275 res
= Fcons (elt
, res
);
4277 return unbind_to (count
, any
? res
: Qnil
);
4279 #endif /* !SIOCGIFADDR && !SIOCGIFHWADDR && !SIOCGIFFLAGS */
4280 #endif /* defined (HAVE_NET_IF_H) */
4282 DEFUN ("network-interface-list", Fnetwork_interface_list
,
4283 Snetwork_interface_list
, 0, 0, 0,
4284 doc
: /* Return an alist of all network interfaces and their network address.
4285 Each element is a cons, the car of which is a string containing the
4286 interface name, and the cdr is the network address in internal
4287 format; see the description of ADDRESS in `make-network-process'.
4289 If the information is not available, return nil. */)
4292 #if (defined HAVE_NET_IF_H && defined SIOCGIFCONF) || defined WINDOWSNT
4293 return network_interface_list ();
4299 DEFUN ("network-interface-info", Fnetwork_interface_info
,
4300 Snetwork_interface_info
, 1, 1, 0,
4301 doc
: /* Return information about network interface named IFNAME.
4302 The return value is a list (ADDR BCAST NETMASK HWADDR FLAGS),
4303 where ADDR is the layer 3 address, BCAST is the layer 3 broadcast address,
4304 NETMASK is the layer 3 network mask, HWADDR is the layer 2 address, and
4305 FLAGS is the current flags of the interface.
4307 Data that is unavailable is returned as nil. */)
4308 (Lisp_Object ifname
)
4310 #if ((defined HAVE_NET_IF_H \
4311 && (defined SIOCGIFADDR || defined SIOCGIFHWADDR \
4312 || defined SIOCGIFFLAGS)) \
4313 || defined WINDOWSNT)
4314 return network_interface_info (ifname
);
4320 /* If program file NAME starts with /: for quoting a magic
4321 name, remove that, preserving the multibyteness of NAME. */
4324 remove_slash_colon (Lisp_Object name
)
4327 ((SBYTES (name
) > 2 && SREF (name
, 0) == '/' && SREF (name
, 1) == ':')
4328 ? make_specified_string (SSDATA (name
) + 2, SCHARS (name
) - 2,
4329 SBYTES (name
) - 2, STRING_MULTIBYTE (name
))
4333 /* Turn off input and output for process PROC. */
4336 deactivate_process (Lisp_Object proc
)
4339 struct Lisp_Process
*p
= XPROCESS (proc
);
4343 /* Delete GnuTLS structures in PROC, if any. */
4344 emacs_gnutls_deinit (proc
);
4345 #endif /* HAVE_GNUTLS */
4347 if (p
->read_output_delay
> 0)
4349 if (--process_output_delay_count
< 0)
4350 process_output_delay_count
= 0;
4351 p
->read_output_delay
= 0;
4352 p
->read_output_skip
= 0;
4355 /* Beware SIGCHLD hereabouts. */
4357 for (i
= 0; i
< PROCESS_OPEN_FDS
; i
++)
4358 close_process_fd (&p
->open_fd
[i
]);
4360 inchannel
= p
->infd
;
4365 #ifdef DATAGRAM_SOCKETS
4366 if (DATAGRAM_CHAN_P (inchannel
))
4368 xfree (datagram_address
[inchannel
].sa
);
4369 datagram_address
[inchannel
].sa
= 0;
4370 datagram_address
[inchannel
].len
= 0;
4373 chan_process
[inchannel
] = Qnil
;
4374 FD_CLR (inchannel
, &input_wait_mask
);
4375 FD_CLR (inchannel
, &non_keyboard_wait_mask
);
4376 #ifdef NON_BLOCKING_CONNECT
4377 if (FD_ISSET (inchannel
, &connect_wait_mask
))
4379 FD_CLR (inchannel
, &connect_wait_mask
);
4380 FD_CLR (inchannel
, &write_mask
);
4381 if (--num_pending_connects
< 0)
4385 if (inchannel
== max_process_desc
)
4387 /* We just closed the highest-numbered process input descriptor,
4388 so recompute the highest-numbered one now. */
4392 while (0 <= i
&& NILP (chan_process
[i
]));
4394 max_process_desc
= i
;
4400 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
4402 doc
: /* Allow any pending output from subprocesses to be read by Emacs.
4403 It is given to their filter functions.
4404 Optional argument PROCESS means do not return until output has been
4405 received from PROCESS.
4407 Optional second argument SECONDS and third argument MILLISEC
4408 specify a timeout; return after that much time even if there is
4409 no subprocess output. If SECONDS is a floating point number,
4410 it specifies a fractional number of seconds to wait.
4411 The MILLISEC argument is obsolete and should be avoided.
4413 If optional fourth argument JUST-THIS-ONE is non-nil, accept output
4414 from PROCESS only, suspending reading output from other processes.
4415 If JUST-THIS-ONE is an integer, don't run any timers either.
4416 Return non-nil if we received any output from PROCESS (or, if PROCESS
4417 is nil, from any process) before the timeout expired. */)
4418 (register Lisp_Object process
, Lisp_Object seconds
, Lisp_Object millisec
, Lisp_Object just_this_one
)
4423 if (! NILP (process
))
4424 CHECK_PROCESS (process
);
4426 just_this_one
= Qnil
;
4428 if (!NILP (millisec
))
4429 { /* Obsolete calling convention using integers rather than floats. */
4430 CHECK_NUMBER (millisec
);
4432 seconds
= make_float (XINT (millisec
) / 1000.0);
4435 CHECK_NUMBER (seconds
);
4436 seconds
= make_float (XINT (millisec
) / 1000.0 + XINT (seconds
));
4443 if (!NILP (seconds
))
4445 if (INTEGERP (seconds
))
4447 if (XINT (seconds
) > 0)
4449 secs
= XINT (seconds
);
4453 else if (FLOATP (seconds
))
4455 if (XFLOAT_DATA (seconds
) > 0)
4457 struct timespec t
= dtotimespec (XFLOAT_DATA (seconds
));
4458 secs
= min (t
.tv_sec
, WAIT_READING_MAX
);
4463 wrong_type_argument (Qnumberp
, seconds
);
4465 else if (! NILP (process
))
4469 ((wait_reading_process_output (secs
, nsecs
, 0, 0,
4471 !NILP (process
) ? XPROCESS (process
) : NULL
,
4472 (NILP (just_this_one
) ? 0
4473 : !INTEGERP (just_this_one
) ? 1 : -1))
4478 /* Accept a connection for server process SERVER on CHANNEL. */
4480 static EMACS_INT connect_counter
= 0;
4483 server_accept_connection (Lisp_Object server
, int channel
)
4485 Lisp_Object proc
, caller
, name
, buffer
;
4486 Lisp_Object contact
, host
, service
;
4487 struct Lisp_Process
*ps
= XPROCESS (server
);
4488 struct Lisp_Process
*p
;
4492 struct sockaddr_in in
;
4494 struct sockaddr_in6 in6
;
4496 #ifdef HAVE_LOCAL_SOCKETS
4497 struct sockaddr_un un
;
4500 socklen_t len
= sizeof saddr
;
4503 s
= accept4 (channel
, &saddr
.sa
, &len
, SOCK_CLOEXEC
);
4512 if (code
== EWOULDBLOCK
)
4516 if (!NILP (ps
->log
))
4517 call3 (ps
->log
, server
, Qnil
,
4518 concat3 (build_string ("accept failed with code"),
4519 Fnumber_to_string (make_number (code
)),
4520 build_string ("\n")));
4524 count
= SPECPDL_INDEX ();
4525 record_unwind_protect_int (close_file_unwind
, s
);
4529 /* Setup a new process to handle the connection. */
4531 /* Generate a unique identification of the caller, and build contact
4532 information for this process. */
4535 switch (saddr
.sa
.sa_family
)
4539 unsigned char *ip
= (unsigned char *)&saddr
.in
.sin_addr
.s_addr
;
4541 AUTO_STRING (ipv4_format
, "%d.%d.%d.%d");
4542 host
= CALLN (Fformat
, ipv4_format
,
4543 make_number (ip
[0]), make_number (ip
[1]),
4544 make_number (ip
[2]), make_number (ip
[3]));
4545 service
= make_number (ntohs (saddr
.in
.sin_port
));
4546 AUTO_STRING (caller_format
, " <%s:%d>");
4547 caller
= CALLN (Fformat
, caller_format
, host
, service
);
4554 Lisp_Object args
[9];
4555 uint16_t *ip6
= (uint16_t *)&saddr
.in6
.sin6_addr
;
4558 AUTO_STRING (ipv6_format
, "%x:%x:%x:%x:%x:%x:%x:%x");
4559 args
[0] = ipv6_format
;
4560 for (i
= 0; i
< 8; i
++)
4561 args
[i
+ 1] = make_number (ntohs (ip6
[i
]));
4562 host
= CALLMANY (Fformat
, args
);
4563 service
= make_number (ntohs (saddr
.in
.sin_port
));
4564 AUTO_STRING (caller_format
, " <[%s]:%d>");
4565 caller
= CALLN (Fformat
, caller_format
, host
, service
);
4570 #ifdef HAVE_LOCAL_SOCKETS
4574 caller
= Fnumber_to_string (make_number (connect_counter
));
4575 AUTO_STRING (space_less_than
, " <");
4576 AUTO_STRING (greater_than
, ">");
4577 caller
= concat3 (space_less_than
, caller
, greater_than
);
4581 /* Create a new buffer name for this process if it doesn't have a
4582 filter. The new buffer name is based on the buffer name or
4583 process name of the server process concatenated with the caller
4586 if (!(EQ (ps
->filter
, Qinternal_default_process_filter
)
4587 || EQ (ps
->filter
, Qt
)))
4591 buffer
= ps
->buffer
;
4593 buffer
= Fbuffer_name (buffer
);
4598 buffer
= concat2 (buffer
, caller
);
4599 buffer
= Fget_buffer_create (buffer
);
4603 /* Generate a unique name for the new server process. Combine the
4604 server process name with the caller identification. */
4606 name
= concat2 (ps
->name
, caller
);
4607 proc
= make_process (name
);
4609 chan_process
[s
] = proc
;
4611 fcntl (s
, F_SETFL
, O_NONBLOCK
);
4613 p
= XPROCESS (proc
);
4615 /* Build new contact information for this setup. */
4616 contact
= Fcopy_sequence (ps
->childp
);
4617 contact
= Fplist_put (contact
, QCserver
, Qnil
);
4618 contact
= Fplist_put (contact
, QChost
, host
);
4619 if (!NILP (service
))
4620 contact
= Fplist_put (contact
, QCservice
, service
);
4621 contact
= Fplist_put (contact
, QCremote
,
4622 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
4623 #ifdef HAVE_GETSOCKNAME
4625 if (getsockname (s
, &saddr
.sa
, &len
) == 0)
4626 contact
= Fplist_put (contact
, QClocal
,
4627 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
4630 pset_childp (p
, contact
);
4631 pset_plist (p
, Fcopy_sequence (ps
->plist
));
4632 pset_type (p
, Qnetwork
);
4634 pset_buffer (p
, buffer
);
4635 pset_sentinel (p
, ps
->sentinel
);
4636 pset_filter (p
, ps
->filter
);
4637 pset_command (p
, Qnil
);
4640 /* Discard the unwind protect for closing S. */
4641 specpdl_ptr
= specpdl
+ count
;
4643 p
->open_fd
[SUBPROCESS_STDIN
] = s
;
4646 pset_status (p
, Qrun
);
4648 /* Client processes for accepted connections are not stopped initially. */
4649 if (!EQ (p
->filter
, Qt
))
4651 FD_SET (s
, &input_wait_mask
);
4652 FD_SET (s
, &non_keyboard_wait_mask
);
4655 if (s
> max_process_desc
)
4656 max_process_desc
= s
;
4658 /* Setup coding system for new process based on server process.
4659 This seems to be the proper thing to do, as the coding system
4660 of the new process should reflect the settings at the time the
4661 server socket was opened; not the current settings. */
4663 pset_decode_coding_system (p
, ps
->decode_coding_system
);
4664 pset_encode_coding_system (p
, ps
->encode_coding_system
);
4665 setup_process_coding_systems (proc
);
4667 pset_decoding_buf (p
, empty_unibyte_string
);
4668 p
->decoding_carryover
= 0;
4669 pset_encoding_buf (p
, empty_unibyte_string
);
4671 p
->inherit_coding_system_flag
4672 = (NILP (buffer
) ? 0 : ps
->inherit_coding_system_flag
);
4674 AUTO_STRING (dash
, "-");
4675 AUTO_STRING (nl
, "\n");
4676 Lisp_Object host_string
= STRINGP (host
) ? host
: dash
;
4678 if (!NILP (ps
->log
))
4680 AUTO_STRING (accept_from
, "accept from ");
4681 call3 (ps
->log
, server
, proc
, concat3 (accept_from
, host_string
, nl
));
4684 AUTO_STRING (open_from
, "open from ");
4685 exec_sentinel (proc
, concat3 (open_from
, host_string
, nl
));
4688 #ifdef HAVE_GETADDRINFO_A
4690 check_for_dns (Lisp_Object proc
)
4692 struct Lisp_Process
*p
= XPROCESS (proc
);
4693 Lisp_Object ip_addresses
= Qnil
;
4697 if (! p
->dns_requests
)
4700 ret
= gai_error (p
->dns_requests
[0]);
4701 if (ret
== EAI_INPROGRESS
)
4704 /* We got a response. */
4707 struct addrinfo
*res
;
4709 for (res
= p
->dns_requests
[0]->ar_result
; res
; res
= res
->ai_next
)
4711 ip_addresses
= Fcons (conv_sockaddr_to_lisp
4712 (res
->ai_addr
, res
->ai_addrlen
),
4716 ip_addresses
= Fnreverse (ip_addresses
);
4718 /* The DNS lookup failed. */
4719 else if (EQ (p
->status
, Qconnect
))
4721 deactivate_process (proc
);
4722 pset_status (p
, (list2
4724 concat3 (build_string ("Name lookup of "),
4725 build_string (p
->dns_requests
[0]->ar_name
),
4726 build_string (" failed")))));
4729 free_dns_request (proc
);
4731 /* This process should not already be connected (or killed). */
4732 if (!EQ (p
->status
, Qconnect
))
4735 return ip_addresses
;
4738 #endif /* HAVE_GETADDRINFO_A */
4741 wait_for_socket_fds (Lisp_Object process
, char *name
)
4743 while (XPROCESS (process
)->infd
< 0 &&
4744 EQ (XPROCESS (process
)->status
, Qconnect
))
4746 add_to_log ("Waiting for socket from %s...\n", build_string (name
));
4747 wait_reading_process_output (0, 20 * 1000 * 1000, 0, 0, Qnil
, NULL
, 0);
4752 wait_while_connecting (Lisp_Object process
)
4754 while (EQ (XPROCESS (process
)->status
, Qconnect
))
4756 add_to_log ("Waiting for connection...\n");
4757 wait_reading_process_output (0, 20 * 1000 * 1000, 0, 0, Qnil
, NULL
, 0);
4762 wait_for_tls_negotiation (Lisp_Object process
)
4765 while (XPROCESS (process
)->gnutls_p
&&
4766 XPROCESS (process
)->gnutls_initstage
!= GNUTLS_STAGE_READY
)
4768 add_to_log ("Waiting for TLS...\n");
4769 wait_reading_process_output (0, 20 * 1000 * 1000, 0, 0, Qnil
, NULL
, 0);
4774 /* This variable is different from waiting_for_input in keyboard.c.
4775 It is used to communicate to a lisp process-filter/sentinel (via the
4776 function Fwaiting_for_user_input_p below) whether Emacs was waiting
4777 for user-input when that process-filter was called.
4778 waiting_for_input cannot be used as that is by definition 0 when
4779 lisp code is being evalled.
4780 This is also used in record_asynch_buffer_change.
4781 For that purpose, this must be 0
4782 when not inside wait_reading_process_output. */
4783 static int waiting_for_user_input_p
;
4786 wait_reading_process_output_unwind (int data
)
4788 waiting_for_user_input_p
= data
;
4791 /* This is here so breakpoints can be put on it. */
4793 wait_reading_process_output_1 (void)
4797 /* Read and dispose of subprocess output while waiting for timeout to
4798 elapse and/or keyboard input to be available.
4802 If negative, gobble data immediately available but don't wait for any.
4805 an additional duration to wait, measured in nanoseconds
4806 If TIME_LIMIT is zero, then:
4807 If NSECS == 0, there is no limit.
4808 If NSECS > 0, the timeout consists of NSECS only.
4809 If NSECS < 0, gobble data immediately, as if TIME_LIMIT were negative.
4812 0 to ignore keyboard input, or
4813 1 to return when input is available, or
4814 -1 meaning caller will actually read the input, so don't throw to
4815 the quit handler, or
4817 DO_DISPLAY means redisplay should be done to show subprocess
4818 output that arrives.
4820 If WAIT_FOR_CELL is a cons cell, wait until its car is non-nil
4821 (and gobble terminal input into the buffer if any arrives).
4823 If WAIT_PROC is specified, wait until something arrives from that
4826 If JUST_WAIT_PROC is nonzero, handle only output from WAIT_PROC
4827 (suspending output from other processes). A negative value
4828 means don't run any timers either.
4830 Return positive if we received input from WAIT_PROC (or from any
4831 process if WAIT_PROC is null), zero if we attempted to receive
4832 input but got none, and negative if we didn't even try. */
4835 wait_reading_process_output (intmax_t time_limit
, int nsecs
, int read_kbd
,
4837 Lisp_Object wait_for_cell
,
4838 struct Lisp_Process
*wait_proc
, int just_wait_proc
)
4848 struct timespec timeout
, end_time
, timer_delay
;
4849 struct timespec got_output_end_time
= invalid_timespec ();
4850 enum { MINIMUM
= -1, TIMEOUT
, INFINITY
} wait
;
4851 int got_some_output
= -1;
4852 ptrdiff_t count
= SPECPDL_INDEX ();
4854 /* Close to the current time if known, an invalid timespec otherwise. */
4855 struct timespec now
= invalid_timespec ();
4857 FD_ZERO (&Available
);
4860 if (time_limit
== 0 && nsecs
== 0 && wait_proc
&& !NILP (Vinhibit_quit
)
4861 && !(CONSP (wait_proc
->status
)
4862 && EQ (XCAR (wait_proc
->status
), Qexit
)))
4863 message1 ("Blocking call to accept-process-output with quit inhibited!!");
4865 record_unwind_protect_int (wait_reading_process_output_unwind
,
4866 waiting_for_user_input_p
);
4867 waiting_for_user_input_p
= read_kbd
;
4869 if (TYPE_MAXIMUM (time_t) < time_limit
)
4870 time_limit
= TYPE_MAXIMUM (time_t);
4872 if (time_limit
< 0 || nsecs
< 0)
4874 else if (time_limit
> 0 || nsecs
> 0)
4877 now
= current_timespec ();
4878 end_time
= timespec_add (now
, make_timespec (time_limit
, nsecs
));
4885 bool process_skipped
= false;
4887 /* If calling from keyboard input, do not quit
4888 since we want to return C-g as an input character.
4889 Otherwise, do pending quit if requested. */
4892 else if (pending_signals
)
4893 process_pending_signals ();
4895 /* Exit now if the cell we're waiting for became non-nil. */
4896 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4899 #if defined (HAVE_GETADDRINFO_A) || defined (HAVE_GNUTLS)
4901 Lisp_Object ip_addresses
;
4902 Lisp_Object process_list_head
, aproc
;
4903 struct Lisp_Process
*p
;
4905 FOR_EACH_PROCESS(process_list_head
, aproc
)
4907 p
= XPROCESS (aproc
);
4909 if (! wait_proc
|| p
== wait_proc
)
4911 #ifdef HAVE_GETADDRINFO_A
4912 /* Check for pending DNS requests. */
4913 if (p
->dns_requests
)
4915 ip_addresses
= check_for_dns (aproc
);
4916 if (!NILP (ip_addresses
) &&
4917 !EQ (ip_addresses
, Qt
))
4918 connect_network_socket (aproc
, ip_addresses
);
4922 /* Continue TLS negotiation. */
4923 if (p
->gnutls_initstage
== GNUTLS_STAGE_HANDSHAKE_TRIED
&&
4924 p
->is_non_blocking_client
)
4926 gnutls_try_handshake (p
);
4927 p
->gnutls_handshakes_tried
++;
4929 if (p
->gnutls_initstage
== GNUTLS_STAGE_READY
)
4931 gnutls_verify_boot (proc
, Qnil
);
4932 finish_after_tls_connection (aproc
);
4934 else if (p
->gnutls_handshakes_tried
>
4935 GNUTLS_EMACS_HANDSHAKES_LIMIT
)
4937 deactivate_process (aproc
);
4938 pset_status (p
, list2 (Qfailed
,
4939 build_string ("TLS negotiation failed")));
4946 #endif /* GETADDRINFO_A or GNUTLS */
4948 /* Compute time from now till when time limit is up. */
4949 /* Exit if already run out. */
4950 if (wait
== TIMEOUT
)
4952 if (!timespec_valid_p (now
))
4953 now
= current_timespec ();
4954 if (timespec_cmp (end_time
, now
) <= 0)
4956 timeout
= timespec_sub (end_time
, now
);
4959 timeout
= make_timespec (wait
< TIMEOUT
? 0 : 100000, 0);
4961 /* Normally we run timers here.
4962 But not if wait_for_cell; in those cases,
4963 the wait is supposed to be short,
4964 and those callers cannot handle running arbitrary Lisp code here. */
4965 if (NILP (wait_for_cell
)
4966 && just_wait_proc
>= 0)
4970 unsigned old_timers_run
= timers_run
;
4971 struct buffer
*old_buffer
= current_buffer
;
4972 Lisp_Object old_window
= selected_window
;
4974 timer_delay
= timer_check ();
4976 /* If a timer has run, this might have changed buffers
4977 an alike. Make read_key_sequence aware of that. */
4978 if (timers_run
!= old_timers_run
4979 && (old_buffer
!= current_buffer
4980 || !EQ (old_window
, selected_window
))
4981 && waiting_for_user_input_p
== -1)
4982 record_asynch_buffer_change ();
4984 if (timers_run
!= old_timers_run
&& do_display
)
4985 /* We must retry, since a timer may have requeued itself
4986 and that could alter the time_delay. */
4987 redisplay_preserve_echo_area (9);
4991 while (!detect_input_pending ());
4993 /* If there is unread keyboard input, also return. */
4995 && requeued_events_pending_p ())
4998 /* This is so a breakpoint can be put here. */
4999 if (!timespec_valid_p (timer_delay
))
5000 wait_reading_process_output_1 ();
5003 /* Cause C-g and alarm signals to take immediate action,
5004 and cause input available signals to zero out timeout.
5006 It is important that we do this before checking for process
5007 activity. If we get a SIGCHLD after the explicit checks for
5008 process activity, timeout is the only way we will know. */
5010 set_waiting_for_input (&timeout
);
5012 /* If status of something has changed, and no input is
5013 available, notify the user of the change right away. After
5014 this explicit check, we'll let the SIGCHLD handler zap
5015 timeout to get our attention. */
5016 if (update_tick
!= process_tick
)
5021 if (kbd_on_hold_p ())
5024 Atemp
= input_wait_mask
;
5027 timeout
= make_timespec (0, 0);
5028 if ((pselect (max (max_process_desc
, max_input_desc
) + 1,
5030 #ifdef NON_BLOCKING_CONNECT
5031 (num_pending_connects
> 0 ? &Ctemp
: NULL
),
5035 NULL
, &timeout
, NULL
)
5038 /* It's okay for us to do this and then continue with
5039 the loop, since timeout has already been zeroed out. */
5040 clear_waiting_for_input ();
5041 got_some_output
= status_notify (NULL
, wait_proc
);
5042 if (do_display
) redisplay_preserve_echo_area (13);
5046 /* Don't wait for output from a non-running process. Just
5047 read whatever data has already been received. */
5048 if (wait_proc
&& wait_proc
->raw_status_new
)
5049 update_status (wait_proc
);
5051 && ! EQ (wait_proc
->status
, Qrun
)
5052 && ! EQ (wait_proc
->status
, Qconnect
))
5054 bool read_some_bytes
= false;
5056 clear_waiting_for_input ();
5058 /* If data can be read from the process, do so until exhausted. */
5059 if (wait_proc
->infd
>= 0)
5061 XSETPROCESS (proc
, wait_proc
);
5065 int nread
= read_process_output (proc
, wait_proc
->infd
);
5068 if (errno
== EIO
|| errno
== EAGAIN
)
5071 if (errno
== EWOULDBLOCK
)
5077 if (got_some_output
< nread
)
5078 got_some_output
= nread
;
5081 read_some_bytes
= true;
5086 if (read_some_bytes
&& do_display
)
5087 redisplay_preserve_echo_area (10);
5092 /* Wait till there is something to do. */
5094 if (wait_proc
&& just_wait_proc
)
5096 if (wait_proc
->infd
< 0) /* Terminated. */
5098 FD_SET (wait_proc
->infd
, &Available
);
5102 else if (!NILP (wait_for_cell
))
5104 Available
= non_process_wait_mask
;
5111 Available
= non_keyboard_wait_mask
;
5113 Available
= input_wait_mask
;
5114 Writeok
= write_mask
;
5115 check_delay
= wait_proc
? 0 : process_output_delay_count
;
5119 /* If frame size has changed or the window is newly mapped,
5120 redisplay now, before we start to wait. There is a race
5121 condition here; if a SIGIO arrives between now and the select
5122 and indicates that a frame is trashed, the select may block
5123 displaying a trashed screen. */
5124 if (frame_garbaged
&& do_display
)
5126 clear_waiting_for_input ();
5127 redisplay_preserve_echo_area (11);
5129 set_waiting_for_input (&timeout
);
5132 /* Skip the `select' call if input is available and we're
5133 waiting for keyboard input or a cell change (which can be
5134 triggered by processing X events). In the latter case, set
5135 nfds to 1 to avoid breaking the loop. */
5137 if ((read_kbd
|| !NILP (wait_for_cell
))
5138 && detect_input_pending ())
5140 nfds
= read_kbd
? 0 : 1;
5142 FD_ZERO (&Available
);
5146 /* Set the timeout for adaptive read buffering if any
5147 process has non-zero read_output_skip and non-zero
5148 read_output_delay, and we are not reading output for a
5149 specific process. It is not executed if
5150 Vprocess_adaptive_read_buffering is nil. */
5151 if (process_output_skip
&& check_delay
> 0)
5153 int adaptive_nsecs
= timeout
.tv_nsec
;
5154 if (timeout
.tv_sec
> 0 || adaptive_nsecs
> READ_OUTPUT_DELAY_MAX
)
5155 adaptive_nsecs
= READ_OUTPUT_DELAY_MAX
;
5156 for (channel
= 0; check_delay
> 0 && channel
<= max_process_desc
; channel
++)
5158 proc
= chan_process
[channel
];
5161 /* Find minimum non-zero read_output_delay among the
5162 processes with non-zero read_output_skip. */
5163 if (XPROCESS (proc
)->read_output_delay
> 0)
5166 if (!XPROCESS (proc
)->read_output_skip
)
5168 FD_CLR (channel
, &Available
);
5169 process_skipped
= true;
5170 XPROCESS (proc
)->read_output_skip
= 0;
5171 if (XPROCESS (proc
)->read_output_delay
< adaptive_nsecs
)
5172 adaptive_nsecs
= XPROCESS (proc
)->read_output_delay
;
5175 timeout
= make_timespec (0, adaptive_nsecs
);
5176 process_output_skip
= 0;
5179 /* If we've got some output and haven't limited our timeout
5180 with adaptive read buffering, limit it. */
5181 if (got_some_output
> 0 && !process_skipped
5183 || timeout
.tv_nsec
> READ_OUTPUT_DELAY_INCREMENT
))
5184 timeout
= make_timespec (0, READ_OUTPUT_DELAY_INCREMENT
);
5187 if (NILP (wait_for_cell
) && just_wait_proc
>= 0
5188 && timespec_valid_p (timer_delay
)
5189 && timespec_cmp (timer_delay
, timeout
) < 0)
5191 if (!timespec_valid_p (now
))
5192 now
= current_timespec ();
5193 struct timespec timeout_abs
= timespec_add (now
, timeout
);
5194 if (!timespec_valid_p (got_output_end_time
)
5195 || timespec_cmp (timeout_abs
, got_output_end_time
) < 0)
5196 got_output_end_time
= timeout_abs
;
5197 timeout
= timer_delay
;
5200 got_output_end_time
= invalid_timespec ();
5202 /* NOW can become inaccurate if time can pass during pselect. */
5203 if (timeout
.tv_sec
> 0 || timeout
.tv_nsec
> 0)
5204 now
= invalid_timespec ();
5206 #if defined (HAVE_NS)
5208 #elif defined (HAVE_GLIB)
5213 (max (max_process_desc
, max_input_desc
) + 1,
5215 (check_write
? &Writeok
: 0),
5216 NULL
, &timeout
, NULL
);
5219 /* GnuTLS buffers data internally. In lowat mode it leaves
5220 some data in the TCP buffers so that select works, but
5221 with custom pull/push functions we need to check if some
5222 data is available in the buffers manually. */
5225 fd_set tls_available
;
5228 FD_ZERO (&tls_available
);
5231 /* We're not waiting on a specific process, so loop
5232 through all the channels and check for data.
5233 This is a workaround needed for some versions of
5234 the gnutls library -- 2.12.14 has been confirmed
5236 http://comments.gmane.org/gmane.emacs.devel/145074 */
5237 for (channel
= 0; channel
< FD_SETSIZE
; ++channel
)
5238 if (! NILP (chan_process
[channel
]))
5240 struct Lisp_Process
*p
=
5241 XPROCESS (chan_process
[channel
]);
5242 if (p
&& p
->gnutls_p
&& p
->gnutls_state
5243 && ((emacs_gnutls_record_check_pending
5248 eassert (p
->infd
== channel
);
5249 FD_SET (p
->infd
, &tls_available
);
5256 /* Check this specific channel. */
5257 if (wait_proc
->gnutls_p
/* Check for valid process. */
5258 && wait_proc
->gnutls_state
5259 /* Do we have pending data? */
5260 && ((emacs_gnutls_record_check_pending
5261 (wait_proc
->gnutls_state
))
5265 eassert (0 <= wait_proc
->infd
);
5266 /* Set to Available. */
5267 FD_SET (wait_proc
->infd
, &tls_available
);
5272 Available
= tls_available
;
5279 /* Make C-g and alarm signals set flags again. */
5280 clear_waiting_for_input ();
5282 /* If we woke up due to SIGWINCH, actually change size now. */
5283 do_pending_window_change (0);
5287 /* Exit the main loop if we've passed the requested timeout,
5288 or aren't skipping processes and got some output and
5289 haven't lowered our timeout due to timers or SIGIO and
5290 have waited a long amount of time due to repeated
5294 struct timespec cmp_time
5297 : (!process_skipped
&& got_some_output
> 0
5298 && (timeout
.tv_sec
> 0 || timeout
.tv_nsec
> 0))
5299 ? got_output_end_time
5300 : invalid_timespec ());
5301 if (timespec_valid_p (cmp_time
))
5303 now
= current_timespec ();
5304 if (timespec_cmp (cmp_time
, now
) <= 0)
5311 if (xerrno
== EINTR
)
5313 else if (xerrno
== EBADF
)
5316 report_file_errno ("Failed select", Qnil
, xerrno
);
5319 /* Check for keyboard input. */
5320 /* If there is any, return immediately
5321 to give it higher priority than subprocesses. */
5325 unsigned old_timers_run
= timers_run
;
5326 struct buffer
*old_buffer
= current_buffer
;
5327 Lisp_Object old_window
= selected_window
;
5330 if (detect_input_pending_run_timers (do_display
))
5332 swallow_events (do_display
);
5333 if (detect_input_pending_run_timers (do_display
))
5337 /* If a timer has run, this might have changed buffers
5338 an alike. Make read_key_sequence aware of that. */
5339 if (timers_run
!= old_timers_run
5340 && waiting_for_user_input_p
== -1
5341 && (old_buffer
!= current_buffer
5342 || !EQ (old_window
, selected_window
)))
5343 record_asynch_buffer_change ();
5349 /* If there is unread keyboard input, also return. */
5351 && requeued_events_pending_p ())
5354 /* If we are not checking for keyboard input now,
5355 do process events (but don't run any timers).
5356 This is so that X events will be processed.
5357 Otherwise they may have to wait until polling takes place.
5358 That would causes delays in pasting selections, for example.
5360 (We used to do this only if wait_for_cell.) */
5361 if (read_kbd
== 0 && detect_input_pending ())
5363 swallow_events (do_display
);
5364 #if 0 /* Exiting when read_kbd doesn't request that seems wrong, though. */
5365 if (detect_input_pending ())
5370 /* Exit now if the cell we're waiting for became non-nil. */
5371 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
5375 /* If we think we have keyboard input waiting, but didn't get SIGIO,
5376 go read it. This can happen with X on BSD after logging out.
5377 In that case, there really is no input and no SIGIO,
5378 but select says there is input. */
5380 if (read_kbd
&& interrupt_input
5381 && keyboard_bit_set (&Available
) && ! noninteractive
)
5382 handle_input_available_signal (SIGIO
);
5385 /* If checking input just got us a size-change event from X,
5386 obey it now if we should. */
5387 if (read_kbd
|| ! NILP (wait_for_cell
))
5388 do_pending_window_change (0);
5390 /* Check for data from a process. */
5391 if (no_avail
|| nfds
== 0)
5394 for (channel
= 0; channel
<= max_input_desc
; ++channel
)
5396 struct fd_callback_data
*d
= &fd_callback_info
[channel
];
5398 && ((d
->condition
& FOR_READ
5399 && FD_ISSET (channel
, &Available
))
5400 || (d
->condition
& FOR_WRITE
5401 && FD_ISSET (channel
, &write_mask
))))
5402 d
->func (channel
, d
->data
);
5405 for (channel
= 0; channel
<= max_process_desc
; channel
++)
5407 if (FD_ISSET (channel
, &Available
)
5408 && FD_ISSET (channel
, &non_keyboard_wait_mask
)
5409 && !FD_ISSET (channel
, &non_process_wait_mask
))
5413 /* If waiting for this channel, arrange to return as
5414 soon as no more input to be processed. No more
5416 proc
= chan_process
[channel
];
5420 /* If this is a server stream socket, accept connection. */
5421 if (EQ (XPROCESS (proc
)->status
, Qlisten
))
5423 server_accept_connection (proc
, channel
);
5427 /* Read data from the process, starting with our
5428 buffered-ahead character if we have one. */
5430 nread
= read_process_output (proc
, channel
);
5431 if ((!wait_proc
|| wait_proc
== XPROCESS (proc
))
5432 && got_some_output
< nread
)
5433 got_some_output
= nread
;
5436 /* Vacuum up any leftovers without waiting. */
5437 if (wait_proc
== XPROCESS (proc
))
5439 /* Since read_process_output can run a filter,
5440 which can call accept-process-output,
5441 don't try to read from any other processes
5442 before doing the select again. */
5443 FD_ZERO (&Available
);
5446 redisplay_preserve_echo_area (12);
5449 else if (nread
== -1 && errno
== EWOULDBLOCK
)
5452 else if (nread
== -1 && errno
== EAGAIN
)
5455 /* FIXME: Is this special case still needed? */
5456 /* Note that we cannot distinguish between no input
5457 available now and a closed pipe.
5458 With luck, a closed pipe will be accompanied by
5459 subprocess termination and SIGCHLD. */
5460 else if (nread
== 0 && !NETCONN_P (proc
) && !SERIALCONN_P (proc
)
5461 && !PIPECONN_P (proc
))
5465 /* On some OSs with ptys, when the process on one end of
5466 a pty exits, the other end gets an error reading with
5467 errno = EIO instead of getting an EOF (0 bytes read).
5468 Therefore, if we get an error reading and errno =
5469 EIO, just continue, because the child process has
5470 exited and should clean itself up soon (e.g. when we
5472 else if (nread
== -1 && errno
== EIO
)
5474 struct Lisp_Process
*p
= XPROCESS (proc
);
5476 /* Clear the descriptor now, so we only raise the
5478 FD_CLR (channel
, &input_wait_mask
);
5479 FD_CLR (channel
, &non_keyboard_wait_mask
);
5483 /* If the EIO occurs on a pty, the SIGCHLD handler's
5484 waitpid call will not find the process object to
5485 delete. Do it here. */
5486 p
->tick
= ++process_tick
;
5487 pset_status (p
, Qfailed
);
5490 #endif /* HAVE_PTYS */
5491 /* If we can detect process termination, don't consider the
5492 process gone just because its pipe is closed. */
5493 else if (nread
== 0 && !NETCONN_P (proc
) && !SERIALCONN_P (proc
)
5494 && !PIPECONN_P (proc
))
5496 else if (nread
== 0 && PIPECONN_P (proc
))
5498 /* Preserve status of processes already terminated. */
5499 XPROCESS (proc
)->tick
= ++process_tick
;
5500 deactivate_process (proc
);
5501 if (EQ (XPROCESS (proc
)->status
, Qrun
))
5502 pset_status (XPROCESS (proc
),
5503 list2 (Qexit
, make_number (0)));
5507 /* Preserve status of processes already terminated. */
5508 XPROCESS (proc
)->tick
= ++process_tick
;
5509 deactivate_process (proc
);
5510 if (XPROCESS (proc
)->raw_status_new
)
5511 update_status (XPROCESS (proc
));
5512 if (EQ (XPROCESS (proc
)->status
, Qrun
))
5513 pset_status (XPROCESS (proc
),
5514 list2 (Qexit
, make_number (256)));
5517 #ifdef NON_BLOCKING_CONNECT
5518 if (FD_ISSET (channel
, &Writeok
)
5519 && FD_ISSET (channel
, &connect_wait_mask
))
5521 struct Lisp_Process
*p
;
5523 FD_CLR (channel
, &connect_wait_mask
);
5524 FD_CLR (channel
, &write_mask
);
5525 if (--num_pending_connects
< 0)
5528 proc
= chan_process
[channel
];
5532 p
= XPROCESS (proc
);
5535 /* getsockopt(,,SO_ERROR,,) is said to hang on some systems.
5536 So only use it on systems where it is known to work. */
5538 socklen_t xlen
= sizeof (xerrno
);
5539 if (getsockopt (channel
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &xlen
))
5544 struct sockaddr pname
;
5545 socklen_t pnamelen
= sizeof (pname
);
5547 /* If connection failed, getpeername will fail. */
5549 if (getpeername (channel
, &pname
, &pnamelen
) < 0)
5551 /* Obtain connect failure code through error slippage. */
5554 if (errno
== ENOTCONN
&& read (channel
, &dummy
, 1) < 0)
5561 p
->tick
= ++process_tick
;
5562 pset_status (p
, list2 (Qfailed
, make_number (xerrno
)));
5563 deactivate_process (proc
);
5568 /* If we have an incompletely set up TLS connection,
5569 then defer the sentinel signalling until
5571 if (NILP (p
->gnutls_boot_parameters
) &&
5575 pset_status (p
, Qrun
);
5576 /* Execute the sentinel here. If we had relied on
5577 status_notify to do it later, it will read input
5578 from the process before calling the sentinel. */
5579 exec_sentinel (proc
, build_string ("open\n"));
5582 if (0 <= p
->infd
&& !EQ (p
->filter
, Qt
)
5583 && !EQ (p
->command
, Qt
))
5585 FD_SET (p
->infd
, &input_wait_mask
);
5586 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
5590 #endif /* NON_BLOCKING_CONNECT */
5591 } /* End for each file descriptor. */
5592 } /* End while exit conditions not met. */
5594 unbind_to (count
, Qnil
);
5596 /* If calling from keyboard input, do not quit
5597 since we want to return C-g as an input character.
5598 Otherwise, do pending quit if requested. */
5601 /* Prevent input_pending from remaining set if we quit. */
5602 clear_input_pending ();
5606 return got_some_output
;
5609 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
5612 read_process_output_call (Lisp_Object fun_and_args
)
5614 return apply1 (XCAR (fun_and_args
), XCDR (fun_and_args
));
5618 read_process_output_error_handler (Lisp_Object error_val
)
5620 cmd_error_internal (error_val
, "error in process filter: ");
5622 update_echo_area ();
5623 Fsleep_for (make_number (2), Qnil
);
5628 read_and_dispose_of_process_output (struct Lisp_Process
*p
, char *chars
,
5630 struct coding_system
*coding
);
5632 /* Read pending output from the process channel,
5633 starting with our buffered-ahead character if we have one.
5634 Yield number of decoded characters read.
5636 This function reads at most 4096 characters.
5637 If you want to read all available subprocess output,
5638 you must call it repeatedly until it returns zero.
5640 The characters read are decoded according to PROC's coding-system
5644 read_process_output (Lisp_Object proc
, int channel
)
5647 struct Lisp_Process
*p
= XPROCESS (proc
);
5648 struct coding_system
*coding
= proc_decode_coding_system
[channel
];
5649 int carryover
= p
->decoding_carryover
;
5650 enum { readmax
= 4096 };
5651 ptrdiff_t count
= SPECPDL_INDEX ();
5652 Lisp_Object odeactivate
;
5653 char chars
[sizeof coding
->carryover
+ readmax
];
5656 /* See the comment above. */
5657 memcpy (chars
, SDATA (p
->decoding_buf
), carryover
);
5659 #ifdef DATAGRAM_SOCKETS
5660 /* We have a working select, so proc_buffered_char is always -1. */
5661 if (DATAGRAM_CHAN_P (channel
))
5663 socklen_t len
= datagram_address
[channel
].len
;
5664 nbytes
= recvfrom (channel
, chars
+ carryover
, readmax
,
5665 0, datagram_address
[channel
].sa
, &len
);
5670 bool buffered
= proc_buffered_char
[channel
] >= 0;
5673 chars
[carryover
] = proc_buffered_char
[channel
];
5674 proc_buffered_char
[channel
] = -1;
5677 if (p
->gnutls_p
&& p
->gnutls_state
)
5678 nbytes
= emacs_gnutls_read (p
, chars
+ carryover
+ buffered
,
5679 readmax
- buffered
);
5682 nbytes
= emacs_read (channel
, chars
+ carryover
+ buffered
,
5683 readmax
- buffered
);
5684 if (nbytes
> 0 && p
->adaptive_read_buffering
)
5686 int delay
= p
->read_output_delay
;
5689 if (delay
< READ_OUTPUT_DELAY_MAX_MAX
)
5692 process_output_delay_count
++;
5693 delay
+= READ_OUTPUT_DELAY_INCREMENT
* 2;
5696 else if (delay
> 0 && nbytes
== readmax
- buffered
)
5698 delay
-= READ_OUTPUT_DELAY_INCREMENT
;
5700 process_output_delay_count
--;
5702 p
->read_output_delay
= delay
;
5705 p
->read_output_skip
= 1;
5706 process_output_skip
= 1;
5710 nbytes
+= buffered
&& nbytes
<= 0;
5713 p
->decoding_carryover
= 0;
5715 /* At this point, NBYTES holds number of bytes just received
5716 (including the one in proc_buffered_char[channel]). */
5719 if (nbytes
< 0 || coding
->mode
& CODING_MODE_LAST_BLOCK
)
5721 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5724 /* Now set NBYTES how many bytes we must decode. */
5725 nbytes
+= carryover
;
5727 odeactivate
= Vdeactivate_mark
;
5728 /* There's no good reason to let process filters change the current
5729 buffer, and many callers of accept-process-output, sit-for, and
5730 friends don't expect current-buffer to be changed from under them. */
5731 record_unwind_current_buffer ();
5733 read_and_dispose_of_process_output (p
, chars
, nbytes
, coding
);
5735 /* Handling the process output should not deactivate the mark. */
5736 Vdeactivate_mark
= odeactivate
;
5738 unbind_to (count
, Qnil
);
5743 read_and_dispose_of_process_output (struct Lisp_Process
*p
, char *chars
,
5745 struct coding_system
*coding
)
5747 Lisp_Object outstream
= p
->filter
;
5749 bool outer_running_asynch_code
= running_asynch_code
;
5750 int waiting
= waiting_for_user_input_p
;
5753 Lisp_Object obuffer
, okeymap
;
5754 XSETBUFFER (obuffer
, current_buffer
);
5755 okeymap
= BVAR (current_buffer
, keymap
);
5758 /* We inhibit quit here instead of just catching it so that
5759 hitting ^G when a filter happens to be running won't screw
5761 specbind (Qinhibit_quit
, Qt
);
5762 specbind (Qlast_nonmenu_event
, Qt
);
5764 /* In case we get recursively called,
5765 and we already saved the match data nonrecursively,
5766 save the same match data in safely recursive fashion. */
5767 if (outer_running_asynch_code
)
5770 /* Don't clobber the CURRENT match data, either! */
5771 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
5772 restore_search_regs ();
5773 record_unwind_save_match_data ();
5774 Fset_match_data (tem
, Qt
);
5777 /* For speed, if a search happens within this code,
5778 save the match data in a special nonrecursive fashion. */
5779 running_asynch_code
= 1;
5781 decode_coding_c_string (coding
, (unsigned char *) chars
, nbytes
, Qt
);
5782 text
= coding
->dst_object
;
5783 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5784 /* A new coding system might be found. */
5785 if (!EQ (p
->decode_coding_system
, Vlast_coding_system_used
))
5787 pset_decode_coding_system (p
, Vlast_coding_system_used
);
5789 /* Don't call setup_coding_system for
5790 proc_decode_coding_system[channel] here. It is done in
5791 detect_coding called via decode_coding above. */
5793 /* If a coding system for encoding is not yet decided, we set
5794 it as the same as coding-system for decoding.
5796 But, before doing that we must check if
5797 proc_encode_coding_system[p->outfd] surely points to a
5798 valid memory because p->outfd will be changed once EOF is
5799 sent to the process. */
5800 if (NILP (p
->encode_coding_system
) && p
->outfd
>= 0
5801 && proc_encode_coding_system
[p
->outfd
])
5803 pset_encode_coding_system
5804 (p
, coding_inherit_eol_type (Vlast_coding_system_used
, Qnil
));
5805 setup_coding_system (p
->encode_coding_system
,
5806 proc_encode_coding_system
[p
->outfd
]);
5810 if (coding
->carryover_bytes
> 0)
5812 if (SCHARS (p
->decoding_buf
) < coding
->carryover_bytes
)
5813 pset_decoding_buf (p
, make_uninit_string (coding
->carryover_bytes
));
5814 memcpy (SDATA (p
->decoding_buf
), coding
->carryover
,
5815 coding
->carryover_bytes
);
5816 p
->decoding_carryover
= coding
->carryover_bytes
;
5818 if (SBYTES (text
) > 0)
5819 /* FIXME: It's wrong to wrap or not based on debug-on-error, and
5820 sometimes it's simply wrong to wrap (e.g. when called from
5821 accept-process-output). */
5822 internal_condition_case_1 (read_process_output_call
,
5823 list3 (outstream
, make_lisp_proc (p
), text
),
5824 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
5825 read_process_output_error_handler
);
5827 /* If we saved the match data nonrecursively, restore it now. */
5828 restore_search_regs ();
5829 running_asynch_code
= outer_running_asynch_code
;
5831 /* Restore waiting_for_user_input_p as it was
5832 when we were called, in case the filter clobbered it. */
5833 waiting_for_user_input_p
= waiting
;
5835 #if 0 /* Call record_asynch_buffer_change unconditionally,
5836 because we might have changed minor modes or other things
5837 that affect key bindings. */
5838 if (! EQ (Fcurrent_buffer (), obuffer
)
5839 || ! EQ (current_buffer
->keymap
, okeymap
))
5841 /* But do it only if the caller is actually going to read events.
5842 Otherwise there's no need to make him wake up, and it could
5843 cause trouble (for example it would make sit_for return). */
5844 if (waiting_for_user_input_p
== -1)
5845 record_asynch_buffer_change ();
5848 DEFUN ("internal-default-process-filter", Finternal_default_process_filter
,
5849 Sinternal_default_process_filter
, 2, 2, 0,
5850 doc
: /* Function used as default process filter.
5851 This inserts the process's output into its buffer, if there is one.
5852 Otherwise it discards the output. */)
5853 (Lisp_Object proc
, Lisp_Object text
)
5855 struct Lisp_Process
*p
;
5858 CHECK_PROCESS (proc
);
5859 p
= XPROCESS (proc
);
5860 CHECK_STRING (text
);
5862 if (!NILP (p
->buffer
) && BUFFER_LIVE_P (XBUFFER (p
->buffer
)))
5864 Lisp_Object old_read_only
;
5865 ptrdiff_t old_begv
, old_zv
;
5866 ptrdiff_t old_begv_byte
, old_zv_byte
;
5867 ptrdiff_t before
, before_byte
;
5868 ptrdiff_t opoint_byte
;
5871 Fset_buffer (p
->buffer
);
5873 opoint_byte
= PT_BYTE
;
5874 old_read_only
= BVAR (current_buffer
, read_only
);
5877 old_begv_byte
= BEGV_BYTE
;
5878 old_zv_byte
= ZV_BYTE
;
5880 bset_read_only (current_buffer
, Qnil
);
5882 /* Insert new output into buffer at the current end-of-output
5883 marker, thus preserving logical ordering of input and output. */
5884 if (XMARKER (p
->mark
)->buffer
)
5885 set_point_from_marker (p
->mark
);
5887 SET_PT_BOTH (ZV
, ZV_BYTE
);
5889 before_byte
= PT_BYTE
;
5891 /* If the output marker is outside of the visible region, save
5892 the restriction and widen. */
5893 if (! (BEGV
<= PT
&& PT
<= ZV
))
5896 /* Adjust the multibyteness of TEXT to that of the buffer. */
5897 if (NILP (BVAR (current_buffer
, enable_multibyte_characters
))
5898 != ! STRING_MULTIBYTE (text
))
5899 text
= (STRING_MULTIBYTE (text
)
5900 ? Fstring_as_unibyte (text
)
5901 : Fstring_to_multibyte (text
));
5902 /* Insert before markers in case we are inserting where
5903 the buffer's mark is, and the user's next command is Meta-y. */
5904 insert_from_string_before_markers (text
, 0, 0,
5905 SCHARS (text
), SBYTES (text
), 0);
5907 /* Make sure the process marker's position is valid when the
5908 process buffer is changed in the signal_after_change above.
5909 W3 is known to do that. */
5910 if (BUFFERP (p
->buffer
)
5911 && (b
= XBUFFER (p
->buffer
), b
!= current_buffer
))
5912 set_marker_both (p
->mark
, p
->buffer
, BUF_PT (b
), BUF_PT_BYTE (b
));
5914 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
5916 update_mode_lines
= 23;
5918 /* Make sure opoint and the old restrictions
5919 float ahead of any new text just as point would. */
5920 if (opoint
>= before
)
5922 opoint
+= PT
- before
;
5923 opoint_byte
+= PT_BYTE
- before_byte
;
5925 if (old_begv
> before
)
5927 old_begv
+= PT
- before
;
5928 old_begv_byte
+= PT_BYTE
- before_byte
;
5930 if (old_zv
>= before
)
5932 old_zv
+= PT
- before
;
5933 old_zv_byte
+= PT_BYTE
- before_byte
;
5936 /* If the restriction isn't what it should be, set it. */
5937 if (old_begv
!= BEGV
|| old_zv
!= ZV
)
5938 Fnarrow_to_region (make_number (old_begv
), make_number (old_zv
));
5940 bset_read_only (current_buffer
, old_read_only
);
5941 SET_PT_BOTH (opoint
, opoint_byte
);
5946 /* Sending data to subprocess. */
5948 /* In send_process, when a write fails temporarily,
5949 wait_reading_process_output is called. It may execute user code,
5950 e.g. timers, that attempts to write new data to the same process.
5951 We must ensure that data is sent in the right order, and not
5952 interspersed half-completed with other writes (Bug#10815). This is
5953 handled by the write_queue element of struct process. It is a list
5954 with each entry having the form
5956 (string . (offset . length))
5958 where STRING is a lisp string, OFFSET is the offset into the
5959 string's byte sequence from which we should begin to send, and
5960 LENGTH is the number of bytes left to send. */
5962 /* Create a new entry in write_queue.
5963 INPUT_OBJ should be a buffer, string Qt, or Qnil.
5964 BUF is a pointer to the string sequence of the input_obj or a C
5965 string in case of Qt or Qnil. */
5968 write_queue_push (struct Lisp_Process
*p
, Lisp_Object input_obj
,
5969 const char *buf
, ptrdiff_t len
, bool front
)
5972 Lisp_Object entry
, obj
;
5974 if (STRINGP (input_obj
))
5976 offset
= buf
- SSDATA (input_obj
);
5982 obj
= make_unibyte_string (buf
, len
);
5985 entry
= Fcons (obj
, Fcons (make_number (offset
), make_number (len
)));
5988 pset_write_queue (p
, Fcons (entry
, p
->write_queue
));
5990 pset_write_queue (p
, nconc2 (p
->write_queue
, list1 (entry
)));
5993 /* Remove the first element in the write_queue of process P, put its
5994 contents in OBJ, BUF and LEN, and return true. If the
5995 write_queue is empty, return false. */
5998 write_queue_pop (struct Lisp_Process
*p
, Lisp_Object
*obj
,
5999 const char **buf
, ptrdiff_t *len
)
6001 Lisp_Object entry
, offset_length
;
6004 if (NILP (p
->write_queue
))
6007 entry
= XCAR (p
->write_queue
);
6008 pset_write_queue (p
, XCDR (p
->write_queue
));
6010 *obj
= XCAR (entry
);
6011 offset_length
= XCDR (entry
);
6013 *len
= XINT (XCDR (offset_length
));
6014 offset
= XINT (XCAR (offset_length
));
6015 *buf
= SSDATA (*obj
) + offset
;
6020 /* Send some data to process PROC.
6021 BUF is the beginning of the data; LEN is the number of characters.
6022 OBJECT is the Lisp object that the data comes from. If OBJECT is
6023 nil or t, it means that the data comes from C string.
6025 If OBJECT is not nil, the data is encoded by PROC's coding-system
6026 for encoding before it is sent.
6028 This function can evaluate Lisp code and can garbage collect. */
6031 send_process (Lisp_Object proc
, const char *buf
, ptrdiff_t len
,
6034 struct Lisp_Process
*p
= XPROCESS (proc
);
6036 struct coding_system
*coding
;
6038 if (NETCONN_P (proc
)) {
6039 wait_while_connecting (proc
);
6040 wait_for_tls_negotiation (proc
);
6043 if (p
->raw_status_new
)
6045 if (! EQ (p
->status
, Qrun
))
6046 error ("Process %s not running", SDATA (p
->name
));
6048 error ("Output file descriptor of %s is closed", SDATA (p
->name
));
6050 coding
= proc_encode_coding_system
[p
->outfd
];
6051 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
6053 if ((STRINGP (object
) && STRING_MULTIBYTE (object
))
6054 || (BUFFERP (object
)
6055 && !NILP (BVAR (XBUFFER (object
), enable_multibyte_characters
)))
6058 pset_encode_coding_system
6059 (p
, complement_process_encoding_system (p
->encode_coding_system
));
6060 if (!EQ (Vlast_coding_system_used
, p
->encode_coding_system
))
6062 /* The coding system for encoding was changed to raw-text
6063 because we sent a unibyte text previously. Now we are
6064 sending a multibyte text, thus we must encode it by the
6065 original coding system specified for the current process.
6067 Another reason we come here is that the coding system
6068 was just complemented and a new one was returned by
6069 complement_process_encoding_system. */
6070 setup_coding_system (p
->encode_coding_system
, coding
);
6071 Vlast_coding_system_used
= p
->encode_coding_system
;
6073 coding
->src_multibyte
= 1;
6077 coding
->src_multibyte
= 0;
6078 /* For sending a unibyte text, character code conversion should
6079 not take place but EOL conversion should. So, setup raw-text
6080 or one of the subsidiary if we have not yet done it. */
6081 if (CODING_REQUIRE_ENCODING (coding
))
6083 if (CODING_REQUIRE_FLUSHING (coding
))
6085 /* But, before changing the coding, we must flush out data. */
6086 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
6087 send_process (proc
, "", 0, Qt
);
6088 coding
->mode
&= CODING_MODE_LAST_BLOCK
;
6090 setup_coding_system (raw_text_coding_system
6091 (Vlast_coding_system_used
),
6093 coding
->src_multibyte
= 0;
6096 coding
->dst_multibyte
= 0;
6098 if (CODING_REQUIRE_ENCODING (coding
))
6100 coding
->dst_object
= Qt
;
6101 if (BUFFERP (object
))
6103 ptrdiff_t from_byte
, from
, to
;
6104 ptrdiff_t save_pt
, save_pt_byte
;
6105 struct buffer
*cur
= current_buffer
;
6107 set_buffer_internal (XBUFFER (object
));
6108 save_pt
= PT
, save_pt_byte
= PT_BYTE
;
6110 from_byte
= PTR_BYTE_POS ((unsigned char *) buf
);
6111 from
= BYTE_TO_CHAR (from_byte
);
6112 to
= BYTE_TO_CHAR (from_byte
+ len
);
6113 TEMP_SET_PT_BOTH (from
, from_byte
);
6114 encode_coding_object (coding
, object
, from
, from_byte
,
6115 to
, from_byte
+ len
, Qt
);
6116 TEMP_SET_PT_BOTH (save_pt
, save_pt_byte
);
6117 set_buffer_internal (cur
);
6119 else if (STRINGP (object
))
6121 encode_coding_object (coding
, object
, 0, 0, SCHARS (object
),
6122 SBYTES (object
), Qt
);
6126 coding
->dst_object
= make_unibyte_string (buf
, len
);
6127 coding
->produced
= len
;
6130 len
= coding
->produced
;
6131 object
= coding
->dst_object
;
6132 buf
= SSDATA (object
);
6135 /* If there is already data in the write_queue, put the new data
6136 in the back of queue. Otherwise, ignore it. */
6137 if (!NILP (p
->write_queue
))
6138 write_queue_push (p
, object
, buf
, len
, 0);
6140 do /* while !NILP (p->write_queue) */
6142 ptrdiff_t cur_len
= -1;
6143 const char *cur_buf
;
6144 Lisp_Object cur_object
;
6146 /* If write_queue is empty, ignore it. */
6147 if (!write_queue_pop (p
, &cur_object
, &cur_buf
, &cur_len
))
6151 cur_object
= object
;
6156 /* Send this batch, using one or more write calls. */
6157 ptrdiff_t written
= 0;
6158 int outfd
= p
->outfd
;
6159 #ifdef DATAGRAM_SOCKETS
6160 if (DATAGRAM_CHAN_P (outfd
))
6162 rv
= sendto (outfd
, cur_buf
, cur_len
,
6163 0, datagram_address
[outfd
].sa
,
6164 datagram_address
[outfd
].len
);
6167 else if (errno
== EMSGSIZE
)
6168 report_file_error ("Sending datagram", proc
);
6174 if (p
->gnutls_p
&& p
->gnutls_state
)
6175 written
= emacs_gnutls_write (p
, cur_buf
, cur_len
);
6178 written
= emacs_write_sig (outfd
, cur_buf
, cur_len
);
6179 rv
= (written
? 0 : -1);
6180 if (p
->read_output_delay
> 0
6181 && p
->adaptive_read_buffering
== 1)
6183 p
->read_output_delay
= 0;
6184 process_output_delay_count
--;
6185 p
->read_output_skip
= 0;
6193 || errno
== EWOULDBLOCK
6196 /* Buffer is full. Wait, accepting input;
6197 that may allow the program
6198 to finish doing output and read more. */
6200 #ifdef BROKEN_PTY_READ_AFTER_EAGAIN
6201 /* A gross hack to work around a bug in FreeBSD.
6202 In the following sequence, read(2) returns
6206 write(2) 954 bytes, get EAGAIN
6207 read(2) 1024 bytes in process_read_output
6208 read(2) 11 bytes in process_read_output
6210 That is, read(2) returns more bytes than have
6211 ever been written successfully. The 1033 bytes
6212 read are the 1022 bytes written successfully
6213 after processing (for example with CRs added if
6214 the terminal is set up that way which it is
6215 here). The same bytes will be seen again in a
6216 later read(2), without the CRs. */
6218 if (errno
== EAGAIN
)
6221 ioctl (p
->outfd
, TIOCFLUSH
, &flags
);
6223 #endif /* BROKEN_PTY_READ_AFTER_EAGAIN */
6225 /* Put what we should have written in wait_queue. */
6226 write_queue_push (p
, cur_object
, cur_buf
, cur_len
, 1);
6227 wait_reading_process_output (0, 20 * 1000 * 1000,
6228 0, 0, Qnil
, NULL
, 0);
6229 /* Reread queue, to see what is left. */
6232 else if (errno
== EPIPE
)
6234 p
->raw_status_new
= 0;
6235 pset_status (p
, list2 (Qexit
, make_number (256)));
6236 p
->tick
= ++process_tick
;
6237 deactivate_process (proc
);
6238 error ("process %s no longer connected to pipe; closed it",
6242 /* This is a real error. */
6243 report_file_error ("Writing to process", proc
);
6249 while (!NILP (p
->write_queue
));
6252 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
6254 doc
: /* Send current contents of region as input to PROCESS.
6255 PROCESS may be a process, a buffer, the name of a process or buffer, or
6256 nil, indicating the current buffer's process.
6257 Called from program, takes three arguments, PROCESS, START and END.
6258 If the region is more than 500 characters long,
6259 it is sent in several bunches. This may happen even for shorter regions.
6260 Output from processes can arrive in between bunches.
6262 If PROCESS is a non-blocking network process that hasn't been fully
6263 set up yet, this function will block until socket setup has completed. */)
6264 (Lisp_Object process
, Lisp_Object start
, Lisp_Object end
)
6266 Lisp_Object proc
= get_process (process
);
6267 ptrdiff_t start_byte
, end_byte
;
6269 validate_region (&start
, &end
);
6271 start_byte
= CHAR_TO_BYTE (XINT (start
));
6272 end_byte
= CHAR_TO_BYTE (XINT (end
));
6274 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
6275 move_gap_both (XINT (start
), start_byte
);
6277 if (NETCONN_P (proc
))
6278 wait_while_connecting (proc
);
6280 send_process (proc
, (char *) BYTE_POS_ADDR (start_byte
),
6281 end_byte
- start_byte
, Fcurrent_buffer ());
6286 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
6288 doc
: /* Send PROCESS the contents of STRING as input.
6289 PROCESS may be a process, a buffer, the name of a process or buffer, or
6290 nil, indicating the current buffer's process.
6291 If STRING is more than 500 characters long,
6292 it is sent in several bunches. This may happen even for shorter strings.
6293 Output from processes can arrive in between bunches.
6295 If PROCESS is a non-blocking network process that hasn't been fully
6296 set up yet, this function will block until socket setup has completed. */)
6297 (Lisp_Object process
, Lisp_Object string
)
6300 CHECK_STRING (string
);
6301 proc
= get_process (process
);
6303 send_process (proc
, SSDATA (string
),
6304 SBYTES (string
), string
);
6308 /* Return the foreground process group for the tty/pty that
6309 the process P uses. */
6311 emacs_get_tty_pgrp (struct Lisp_Process
*p
)
6316 if (ioctl (p
->infd
, TIOCGPGRP
, &gid
) == -1 && ! NILP (p
->tty_name
))
6319 /* Some OS:es (Solaris 8/9) does not allow TIOCGPGRP from the
6320 master side. Try the slave side. */
6321 fd
= emacs_open (SSDATA (p
->tty_name
), O_RDONLY
, 0);
6325 ioctl (fd
, TIOCGPGRP
, &gid
);
6329 #endif /* defined (TIOCGPGRP ) */
6334 DEFUN ("process-running-child-p", Fprocess_running_child_p
,
6335 Sprocess_running_child_p
, 0, 1, 0,
6336 doc
: /* Return non-nil if PROCESS has given the terminal to a
6337 child. If the operating system does not make it possible to find out,
6338 return t. If we can find out, return the numeric ID of the foreground
6340 (Lisp_Object process
)
6342 /* Initialize in case ioctl doesn't exist or gives an error,
6343 in a way that will cause returning t. */
6346 struct Lisp_Process
*p
;
6348 proc
= get_process (process
);
6349 p
= XPROCESS (proc
);
6351 if (!EQ (p
->type
, Qreal
))
6352 error ("Process %s is not a subprocess",
6355 error ("Process %s is not active",
6358 gid
= emacs_get_tty_pgrp (p
);
6363 return make_number (gid
);
6367 /* Send a signal number SIGNO to PROCESS.
6368 If CURRENT_GROUP is t, that means send to the process group
6369 that currently owns the terminal being used to communicate with PROCESS.
6370 This is used for various commands in shell mode.
6371 If CURRENT_GROUP is lambda, that means send to the process group
6372 that currently owns the terminal, but only if it is NOT the shell itself.
6374 If NOMSG is false, insert signal-announcements into process's buffers
6377 If we can, we try to signal PROCESS by sending control characters
6378 down the pty. This allows us to signal inferiors who have changed
6379 their uid, for which kill would return an EPERM error. */
6382 process_send_signal (Lisp_Object process
, int signo
, Lisp_Object current_group
,
6386 struct Lisp_Process
*p
;
6390 proc
= get_process (process
);
6391 p
= XPROCESS (proc
);
6393 if (!EQ (p
->type
, Qreal
))
6394 error ("Process %s is not a subprocess",
6397 error ("Process %s is not active",
6401 current_group
= Qnil
;
6403 /* If we are using pgrps, get a pgrp number and make it negative. */
6404 if (NILP (current_group
))
6405 /* Send the signal to the shell's process group. */
6409 #ifdef SIGNALS_VIA_CHARACTERS
6410 /* If possible, send signals to the entire pgrp
6411 by sending an input character to it. */
6414 cc_t
*sig_char
= NULL
;
6416 tcgetattr (p
->infd
, &t
);
6421 sig_char
= &t
.c_cc
[VINTR
];
6425 sig_char
= &t
.c_cc
[VQUIT
];
6429 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
6430 sig_char
= &t
.c_cc
[VSWTCH
];
6432 sig_char
= &t
.c_cc
[VSUSP
];
6437 if (sig_char
&& *sig_char
!= CDISABLE
)
6439 send_process (proc
, (char *) sig_char
, 1, Qnil
);
6442 /* If we can't send the signal with a character,
6443 fall through and send it another way. */
6445 /* The code above may fall through if it can't
6446 handle the signal. */
6447 #endif /* defined (SIGNALS_VIA_CHARACTERS) */
6450 /* Get the current pgrp using the tty itself, if we have that.
6451 Otherwise, use the pty to get the pgrp.
6452 On pfa systems, saka@pfu.fujitsu.co.JP writes:
6453 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
6454 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
6455 His patch indicates that if TIOCGPGRP returns an error, then
6456 we should just assume that p->pid is also the process group id. */
6458 gid
= emacs_get_tty_pgrp (p
);
6461 /* If we can't get the information, assume
6462 the shell owns the tty. */
6465 /* It is not clear whether anything really can set GID to -1.
6466 Perhaps on some system one of those ioctls can or could do so.
6467 Or perhaps this is vestigial. */
6470 #else /* ! defined (TIOCGPGRP) */
6471 /* Can't select pgrps on this system, so we know that
6472 the child itself heads the pgrp. */
6474 #endif /* ! defined (TIOCGPGRP) */
6476 /* If current_group is lambda, and the shell owns the terminal,
6477 don't send any signal. */
6478 if (EQ (current_group
, Qlambda
) && gid
== p
->pid
)
6483 if (signo
== SIGCONT
)
6485 p
->raw_status_new
= 0;
6486 pset_status (p
, Qrun
);
6487 p
->tick
= ++process_tick
;
6490 status_notify (NULL
, NULL
);
6491 redisplay_preserve_echo_area (13);
6497 /* Work around a HP-UX 7.0 bug that mishandles signals to subjobs.
6498 We don't know whether the bug is fixed in later HP-UX versions. */
6499 if (! NILP (current_group
) && ioctl (p
->infd
, TIOCSIGSEND
, signo
) != -1)
6503 /* If we don't have process groups, send the signal to the immediate
6504 subprocess. That isn't really right, but it's better than any
6505 obvious alternative. */
6506 pid_t pid
= no_pgrp
? gid
: - gid
;
6508 /* Do not kill an already-reaped process, as that could kill an
6509 innocent bystander that happens to have the same process ID. */
6511 block_child_signal (&oldset
);
6514 unblock_child_signal (&oldset
);
6517 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
6518 doc
: /* Interrupt process PROCESS.
6519 PROCESS may be a process, a buffer, or the name of a process or buffer.
6520 No arg or nil means current buffer's process.
6521 Second arg CURRENT-GROUP non-nil means send signal to
6522 the current process-group of the process's controlling terminal
6523 rather than to the process's own process group.
6524 If the process is a shell, this means interrupt current subjob
6525 rather than the shell.
6527 If CURRENT-GROUP is `lambda', and if the shell owns the terminal,
6528 don't send the signal. */)
6529 (Lisp_Object process
, Lisp_Object current_group
)
6531 process_send_signal (process
, SIGINT
, current_group
, 0);
6535 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
6536 doc
: /* Kill process PROCESS. May be process or name of one.
6537 See function `interrupt-process' for more details on usage. */)
6538 (Lisp_Object process
, Lisp_Object current_group
)
6540 process_send_signal (process
, SIGKILL
, current_group
, 0);
6544 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
6545 doc
: /* Send QUIT signal to process PROCESS. May be process or name of one.
6546 See function `interrupt-process' for more details on usage. */)
6547 (Lisp_Object process
, Lisp_Object current_group
)
6549 process_send_signal (process
, SIGQUIT
, current_group
, 0);
6553 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
6554 doc
: /* Stop process PROCESS. May be process or name of one.
6555 See function `interrupt-process' for more details on usage.
6556 If PROCESS is a network or serial process, inhibit handling of incoming
6558 (Lisp_Object process
, Lisp_Object current_group
)
6560 if (PROCESSP (process
) && (NETCONN_P (process
) || SERIALCONN_P (process
)
6561 || PIPECONN_P (process
)))
6563 struct Lisp_Process
*p
;
6565 p
= XPROCESS (process
);
6566 if (NILP (p
->command
)
6569 FD_CLR (p
->infd
, &input_wait_mask
);
6570 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
6572 pset_command (p
, Qt
);
6576 error ("No SIGTSTP support");
6578 process_send_signal (process
, SIGTSTP
, current_group
, 0);
6583 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
6584 doc
: /* Continue process PROCESS. May be process or name of one.
6585 See function `interrupt-process' for more details on usage.
6586 If PROCESS is a network or serial process, resume handling of incoming
6588 (Lisp_Object process
, Lisp_Object current_group
)
6590 if (PROCESSP (process
) && (NETCONN_P (process
) || SERIALCONN_P (process
)
6591 || PIPECONN_P (process
)))
6593 struct Lisp_Process
*p
;
6595 p
= XPROCESS (process
);
6596 if (EQ (p
->command
, Qt
)
6598 && (!EQ (p
->filter
, Qt
) || EQ (p
->status
, Qlisten
)))
6600 FD_SET (p
->infd
, &input_wait_mask
);
6601 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
6603 if (fd_info
[ p
->infd
].flags
& FILE_SERIAL
)
6604 PurgeComm (fd_info
[ p
->infd
].hnd
, PURGE_RXABORT
| PURGE_RXCLEAR
);
6605 #else /* not WINDOWSNT */
6606 tcflush (p
->infd
, TCIFLUSH
);
6607 #endif /* not WINDOWSNT */
6609 pset_command (p
, Qnil
);
6613 process_send_signal (process
, SIGCONT
, current_group
, 0);
6615 error ("No SIGCONT support");
6620 /* Return the integer value of the signal whose abbreviation is ABBR,
6621 or a negative number if there is no such signal. */
6623 abbr_to_signal (char const *name
)
6626 char sigbuf
[20]; /* Large enough for all valid signal abbreviations. */
6628 if (!strncmp (name
, "SIG", 3) || !strncmp (name
, "sig", 3))
6631 for (i
= 0; i
< sizeof sigbuf
; i
++)
6633 sigbuf
[i
] = c_toupper (name
[i
]);
6635 return str2sig (sigbuf
, &signo
) == 0 ? signo
: -1;
6641 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
6642 2, 2, "sProcess (name or number): \nnSignal code: ",
6643 doc
: /* Send PROCESS the signal with code SIGCODE.
6644 PROCESS may also be a number specifying the process id of the
6645 process to signal; in this case, the process need not be a child of
6647 SIGCODE may be an integer, or a symbol whose name is a signal name. */)
6648 (Lisp_Object process
, Lisp_Object sigcode
)
6653 if (STRINGP (process
))
6655 Lisp_Object tem
= Fget_process (process
);
6658 Lisp_Object process_number
6659 = string_to_number (SSDATA (process
), 10, 1);
6660 if (NUMBERP (process_number
))
6661 tem
= process_number
;
6665 else if (!NUMBERP (process
))
6666 process
= get_process (process
);
6671 if (NUMBERP (process
))
6672 CONS_TO_INTEGER (process
, pid_t
, pid
);
6675 CHECK_PROCESS (process
);
6676 pid
= XPROCESS (process
)->pid
;
6678 error ("Cannot signal process %s", SDATA (XPROCESS (process
)->name
));
6681 if (INTEGERP (sigcode
))
6683 CHECK_TYPE_RANGED_INTEGER (int, sigcode
);
6684 signo
= XINT (sigcode
);
6690 CHECK_SYMBOL (sigcode
);
6691 name
= SSDATA (SYMBOL_NAME (sigcode
));
6693 signo
= abbr_to_signal (name
);
6695 error ("Undefined signal name %s", name
);
6698 return make_number (kill (pid
, signo
));
6701 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
6702 doc
: /* Make PROCESS see end-of-file in its input.
6703 EOF comes after any text already sent to it.
6704 PROCESS may be a process, a buffer, the name of a process or buffer, or
6705 nil, indicating the current buffer's process.
6706 If PROCESS is a network connection, or is a process communicating
6707 through a pipe (as opposed to a pty), then you cannot send any more
6708 text to PROCESS after you call this function.
6709 If PROCESS is a serial process, wait until all output written to the
6710 process has been transmitted to the serial port. */)
6711 (Lisp_Object process
)
6714 struct coding_system
*coding
= NULL
;
6717 proc
= get_process (process
);
6719 if (NETCONN_P (proc
))
6720 wait_while_connecting (proc
);
6722 if (DATAGRAM_CONN_P (proc
))
6726 outfd
= XPROCESS (proc
)->outfd
;
6728 coding
= proc_encode_coding_system
[outfd
];
6730 /* Make sure the process is really alive. */
6731 if (XPROCESS (proc
)->raw_status_new
)
6732 update_status (XPROCESS (proc
));
6733 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
6734 error ("Process %s not running", SDATA (XPROCESS (proc
)->name
));
6736 if (coding
&& CODING_REQUIRE_FLUSHING (coding
))
6738 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
6739 send_process (proc
, "", 0, Qnil
);
6742 if (XPROCESS (proc
)->pty_flag
)
6743 send_process (proc
, "\004", 1, Qnil
);
6744 else if (EQ (XPROCESS (proc
)->type
, Qserial
))
6747 if (tcdrain (XPROCESS (proc
)->outfd
) != 0)
6748 report_file_error ("Failed tcdrain", Qnil
);
6749 #endif /* not WINDOWSNT */
6750 /* Do nothing on Windows because writes are blocking. */
6754 struct Lisp_Process
*p
= XPROCESS (proc
);
6755 int old_outfd
= p
->outfd
;
6758 #ifdef HAVE_SHUTDOWN
6759 /* If this is a network connection, or socketpair is used
6760 for communication with the subprocess, call shutdown to cause EOF.
6761 (In some old system, shutdown to socketpair doesn't work.
6762 Then we just can't win.) */
6764 && (EQ (p
->type
, Qnetwork
) || p
->infd
== old_outfd
))
6765 shutdown (old_outfd
, 1);
6767 close_process_fd (&p
->open_fd
[WRITE_TO_SUBPROCESS
]);
6768 new_outfd
= emacs_open (NULL_DEVICE
, O_WRONLY
, 0);
6770 report_file_error ("Opening null device", Qnil
);
6771 p
->open_fd
[WRITE_TO_SUBPROCESS
] = new_outfd
;
6772 p
->outfd
= new_outfd
;
6774 if (!proc_encode_coding_system
[new_outfd
])
6775 proc_encode_coding_system
[new_outfd
]
6776 = xmalloc (sizeof (struct coding_system
));
6779 *proc_encode_coding_system
[new_outfd
]
6780 = *proc_encode_coding_system
[old_outfd
];
6781 memset (proc_encode_coding_system
[old_outfd
], 0,
6782 sizeof (struct coding_system
));
6785 setup_coding_system (p
->encode_coding_system
,
6786 proc_encode_coding_system
[new_outfd
]);
6791 /* The main Emacs thread records child processes in three places:
6793 - Vprocess_alist, for asynchronous subprocesses, which are child
6794 processes visible to Lisp.
6796 - deleted_pid_list, for child processes invisible to Lisp,
6797 typically because of delete-process. These are recorded so that
6798 the processes can be reaped when they exit, so that the operating
6799 system's process table is not cluttered by zombies.
6801 - the local variable PID in Fcall_process, call_process_cleanup and
6802 call_process_kill, for synchronous subprocesses.
6803 record_unwind_protect is used to make sure this process is not
6804 forgotten: if the user interrupts call-process and the child
6805 process refuses to exit immediately even with two C-g's,
6806 call_process_kill adds PID's contents to deleted_pid_list before
6809 The main Emacs thread invokes waitpid only on child processes that
6810 it creates and that have not been reaped. This avoid races on
6811 platforms such as GTK, where other threads create their own
6812 subprocesses which the main thread should not reap. For example,
6813 if the main thread attempted to reap an already-reaped child, it
6814 might inadvertently reap a GTK-created process that happened to
6815 have the same process ID. */
6817 /* LIB_CHILD_HANDLER is a SIGCHLD handler that Emacs calls while doing
6818 its own SIGCHLD handling. On POSIXish systems, glib needs this to
6819 keep track of its own children. GNUstep is similar. */
6821 static void dummy_handler (int sig
) {}
6822 static signal_handler_t
volatile lib_child_handler
;
6824 /* Handle a SIGCHLD signal by looking for known child processes of
6825 Emacs whose status have changed. For each one found, record its
6828 All we do is change the status; we do not run sentinels or print
6829 notifications. That is saved for the next time keyboard input is
6830 done, in order to avoid timing errors.
6832 ** WARNING: this can be called during garbage collection.
6833 Therefore, it must not be fooled by the presence of mark bits in
6836 ** USG WARNING: Although it is not obvious from the documentation
6837 in signal(2), on a USG system the SIGCLD handler MUST NOT call
6838 signal() before executing at least one wait(), otherwise the
6839 handler will be called again, resulting in an infinite loop. The
6840 relevant portion of the documentation reads "SIGCLD signals will be
6841 queued and the signal-catching function will be continually
6842 reentered until the queue is empty". Invoking signal() causes the
6843 kernel to reexamine the SIGCLD queue. Fred Fish, UniSoft Systems
6846 ** Malloc WARNING: This should never call malloc either directly or
6847 indirectly; if it does, that is a bug. */
6850 handle_child_signal (int sig
)
6852 Lisp_Object tail
, proc
;
6854 /* Find the process that signaled us, and record its status. */
6856 /* The process can have been deleted by Fdelete_process, or have
6857 been started asynchronously by Fcall_process. */
6858 for (tail
= deleted_pid_list
; CONSP (tail
); tail
= XCDR (tail
))
6860 bool all_pids_are_fixnums
6861 = (MOST_NEGATIVE_FIXNUM
<= TYPE_MINIMUM (pid_t
)
6862 && TYPE_MAXIMUM (pid_t
) <= MOST_POSITIVE_FIXNUM
);
6863 Lisp_Object head
= XCAR (tail
);
6868 if (all_pids_are_fixnums
? INTEGERP (xpid
) : NUMBERP (xpid
))
6871 if (INTEGERP (xpid
))
6872 deleted_pid
= XINT (xpid
);
6874 deleted_pid
= XFLOAT_DATA (xpid
);
6875 if (child_status_changed (deleted_pid
, 0, 0))
6877 if (STRINGP (XCDR (head
)))
6878 unlink (SSDATA (XCDR (head
)));
6879 XSETCAR (tail
, Qnil
);
6884 /* Otherwise, if it is asynchronous, it is in Vprocess_alist. */
6885 FOR_EACH_PROCESS (tail
, proc
)
6887 struct Lisp_Process
*p
= XPROCESS (proc
);
6891 && child_status_changed (p
->pid
, &status
, WUNTRACED
| WCONTINUED
))
6893 /* Change the status of the process that was found. */
6894 p
->tick
= ++process_tick
;
6895 p
->raw_status
= status
;
6896 p
->raw_status_new
= 1;
6898 /* If process has terminated, stop waiting for its output. */
6899 if (WIFSIGNALED (status
) || WIFEXITED (status
))
6901 bool clear_desc_flag
= 0;
6904 clear_desc_flag
= 1;
6906 /* clear_desc_flag avoids a compiler bug in Microsoft C. */
6907 if (clear_desc_flag
)
6909 FD_CLR (p
->infd
, &input_wait_mask
);
6910 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
6916 lib_child_handler (sig
);
6917 #ifdef NS_IMPL_GNUSTEP
6918 /* NSTask in GNUstep sets its child handler each time it is called.
6919 So we must re-set ours. */
6920 catch_child_signal ();
6925 deliver_child_signal (int sig
)
6927 deliver_process_signal (sig
, handle_child_signal
);
6932 exec_sentinel_error_handler (Lisp_Object error_val
)
6934 cmd_error_internal (error_val
, "error in process sentinel: ");
6936 update_echo_area ();
6937 Fsleep_for (make_number (2), Qnil
);
6942 exec_sentinel (Lisp_Object proc
, Lisp_Object reason
)
6944 Lisp_Object sentinel
, odeactivate
;
6945 struct Lisp_Process
*p
= XPROCESS (proc
);
6946 ptrdiff_t count
= SPECPDL_INDEX ();
6947 bool outer_running_asynch_code
= running_asynch_code
;
6948 int waiting
= waiting_for_user_input_p
;
6950 if (inhibit_sentinels
)
6953 odeactivate
= Vdeactivate_mark
;
6955 Lisp_Object obuffer
, okeymap
;
6956 XSETBUFFER (obuffer
, current_buffer
);
6957 okeymap
= BVAR (current_buffer
, keymap
);
6960 /* There's no good reason to let sentinels change the current
6961 buffer, and many callers of accept-process-output, sit-for, and
6962 friends don't expect current-buffer to be changed from under them. */
6963 record_unwind_current_buffer ();
6965 sentinel
= p
->sentinel
;
6967 /* Inhibit quit so that random quits don't screw up a running filter. */
6968 specbind (Qinhibit_quit
, Qt
);
6969 specbind (Qlast_nonmenu_event
, Qt
); /* Why? --Stef */
6971 /* In case we get recursively called,
6972 and we already saved the match data nonrecursively,
6973 save the same match data in safely recursive fashion. */
6974 if (outer_running_asynch_code
)
6977 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
6978 restore_search_regs ();
6979 record_unwind_save_match_data ();
6980 Fset_match_data (tem
, Qt
);
6983 /* For speed, if a search happens within this code,
6984 save the match data in a special nonrecursive fashion. */
6985 running_asynch_code
= 1;
6987 internal_condition_case_1 (read_process_output_call
,
6988 list3 (sentinel
, proc
, reason
),
6989 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
6990 exec_sentinel_error_handler
);
6992 /* If we saved the match data nonrecursively, restore it now. */
6993 restore_search_regs ();
6994 running_asynch_code
= outer_running_asynch_code
;
6996 Vdeactivate_mark
= odeactivate
;
6998 /* Restore waiting_for_user_input_p as it was
6999 when we were called, in case the filter clobbered it. */
7000 waiting_for_user_input_p
= waiting
;
7003 if (! EQ (Fcurrent_buffer (), obuffer
)
7004 || ! EQ (current_buffer
->keymap
, okeymap
))
7006 /* But do it only if the caller is actually going to read events.
7007 Otherwise there's no need to make him wake up, and it could
7008 cause trouble (for example it would make sit_for return). */
7009 if (waiting_for_user_input_p
== -1)
7010 record_asynch_buffer_change ();
7012 unbind_to (count
, Qnil
);
7015 /* Report all recent events of a change in process status
7016 (either run the sentinel or output a message).
7017 This is usually done while Emacs is waiting for keyboard input
7018 but can be done at other times.
7020 Return positive if any input was received from WAIT_PROC (or from
7021 any process if WAIT_PROC is null), zero if input was attempted but
7022 none received, and negative if we didn't even try. */
7025 status_notify (struct Lisp_Process
*deleting_process
,
7026 struct Lisp_Process
*wait_proc
)
7029 Lisp_Object tail
, msg
;
7030 int got_some_output
= -1;
7035 /* Set this now, so that if new processes are created by sentinels
7036 that we run, we get called again to handle their status changes. */
7037 update_tick
= process_tick
;
7039 FOR_EACH_PROCESS (tail
, proc
)
7042 register struct Lisp_Process
*p
= XPROCESS (proc
);
7044 if (p
->tick
!= p
->update_tick
)
7046 p
->update_tick
= p
->tick
;
7048 /* If process is still active, read any output that remains. */
7049 while (! EQ (p
->filter
, Qt
)
7050 && ! EQ (p
->status
, Qconnect
)
7051 && ! EQ (p
->status
, Qlisten
)
7052 /* Network or serial process not stopped: */
7053 && ! EQ (p
->command
, Qt
)
7055 && p
!= deleting_process
)
7057 int nread
= read_process_output (proc
, p
->infd
);
7058 if ((!wait_proc
|| wait_proc
== XPROCESS (proc
))
7059 && got_some_output
< nread
)
7060 got_some_output
= nread
;
7065 /* Get the text to use for the message. */
7066 if (p
->raw_status_new
)
7068 msg
= status_message (p
);
7070 /* If process is terminated, deactivate it or delete it. */
7072 if (CONSP (p
->status
))
7073 symbol
= XCAR (p
->status
);
7075 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
7076 || EQ (symbol
, Qclosed
))
7078 if (delete_exited_processes
)
7079 remove_process (proc
);
7081 deactivate_process (proc
);
7084 /* The actions above may have further incremented p->tick.
7085 So set p->update_tick again so that an error in the sentinel will
7086 not cause this code to be run again. */
7087 p
->update_tick
= p
->tick
;
7088 /* Now output the message suitably. */
7089 exec_sentinel (proc
, msg
);
7090 if (BUFFERP (p
->buffer
))
7091 /* In case it uses %s in mode-line-format. */
7092 bset_update_mode_line (XBUFFER (p
->buffer
));
7096 return got_some_output
;
7099 DEFUN ("internal-default-process-sentinel", Finternal_default_process_sentinel
,
7100 Sinternal_default_process_sentinel
, 2, 2, 0,
7101 doc
: /* Function used as default sentinel for processes.
7102 This inserts a status message into the process's buffer, if there is one. */)
7103 (Lisp_Object proc
, Lisp_Object msg
)
7105 Lisp_Object buffer
, symbol
;
7106 struct Lisp_Process
*p
;
7107 CHECK_PROCESS (proc
);
7108 p
= XPROCESS (proc
);
7112 symbol
= XCAR (symbol
);
7114 if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
7117 struct buffer
*old
= current_buffer
;
7118 ptrdiff_t opoint
, opoint_byte
;
7119 ptrdiff_t before
, before_byte
;
7121 /* Avoid error if buffer is deleted
7122 (probably that's why the process is dead, too). */
7123 if (!BUFFER_LIVE_P (XBUFFER (buffer
)))
7125 Fset_buffer (buffer
);
7127 if (NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
7128 msg
= (code_convert_string_norecord
7129 (msg
, Vlocale_coding_system
, 1));
7132 opoint_byte
= PT_BYTE
;
7133 /* Insert new output into buffer
7134 at the current end-of-output marker,
7135 thus preserving logical ordering of input and output. */
7136 if (XMARKER (p
->mark
)->buffer
)
7137 Fgoto_char (p
->mark
);
7139 SET_PT_BOTH (ZV
, ZV_BYTE
);
7142 before_byte
= PT_BYTE
;
7144 tem
= BVAR (current_buffer
, read_only
);
7145 bset_read_only (current_buffer
, Qnil
);
7146 insert_string ("\nProcess ");
7147 { /* FIXME: temporary kludge. */
7148 Lisp_Object tem2
= p
->name
; Finsert (1, &tem2
); }
7149 insert_string (" ");
7151 bset_read_only (current_buffer
, tem
);
7152 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
7154 if (opoint
>= before
)
7155 SET_PT_BOTH (opoint
+ (PT
- before
),
7156 opoint_byte
+ (PT_BYTE
- before_byte
));
7158 SET_PT_BOTH (opoint
, opoint_byte
);
7160 set_buffer_internal (old
);
7166 DEFUN ("set-process-coding-system", Fset_process_coding_system
,
7167 Sset_process_coding_system
, 1, 3, 0,
7168 doc
: /* Set coding systems of PROCESS to DECODING and ENCODING.
7169 DECODING will be used to decode subprocess output and ENCODING to
7170 encode subprocess input.
7172 If PROCESS is a non-blocking network process that hasn't been fully
7173 set up yet, this function will block until socket setup has completed. */)
7174 (register Lisp_Object process
, Lisp_Object decoding
, Lisp_Object encoding
)
7176 register struct Lisp_Process
*p
;
7178 CHECK_PROCESS (process
);
7180 if (NETCONN_P (process
))
7181 wait_for_socket_fds (process
, "set-process-coding-system");
7183 p
= XPROCESS (process
);
7186 error ("Input file descriptor of %s closed", SDATA (p
->name
));
7188 error ("Output file descriptor of %s closed", SDATA (p
->name
));
7189 Fcheck_coding_system (decoding
);
7190 Fcheck_coding_system (encoding
);
7191 encoding
= coding_inherit_eol_type (encoding
, Qnil
);
7192 pset_decode_coding_system (p
, decoding
);
7193 pset_encode_coding_system (p
, encoding
);
7194 setup_process_coding_systems (process
);
7199 DEFUN ("process-coding-system",
7200 Fprocess_coding_system
, Sprocess_coding_system
, 1, 1, 0,
7201 doc
: /* Return a cons of coding systems for decoding and encoding of PROCESS. */)
7202 (register Lisp_Object process
)
7204 CHECK_PROCESS (process
);
7205 return Fcons (XPROCESS (process
)->decode_coding_system
,
7206 XPROCESS (process
)->encode_coding_system
);
7209 DEFUN ("set-process-filter-multibyte", Fset_process_filter_multibyte
,
7210 Sset_process_filter_multibyte
, 2, 2, 0,
7211 doc
: /* Set multibyteness of the strings given to PROCESS's filter.
7212 If FLAG is non-nil, the filter is given multibyte strings.
7213 If FLAG is nil, the filter is given unibyte strings. In this case,
7214 all character code conversion except for end-of-line conversion is
7216 (Lisp_Object process
, Lisp_Object flag
)
7218 register struct Lisp_Process
*p
;
7220 CHECK_PROCESS (process
);
7222 if (NETCONN_P (process
))
7223 wait_for_socket_fds (process
, "set-process-filter-multibyte");
7225 p
= XPROCESS (process
);
7227 pset_decode_coding_system
7228 (p
, raw_text_coding_system (p
->decode_coding_system
));
7229 setup_process_coding_systems (process
);
7234 DEFUN ("process-filter-multibyte-p", Fprocess_filter_multibyte_p
,
7235 Sprocess_filter_multibyte_p
, 1, 1, 0,
7236 doc
: /* Return t if a multibyte string is given to PROCESS's filter.*/)
7237 (Lisp_Object process
)
7239 register struct Lisp_Process
*p
;
7240 struct coding_system
*coding
;
7242 CHECK_PROCESS (process
);
7243 p
= XPROCESS (process
);
7246 coding
= proc_decode_coding_system
[p
->infd
];
7247 return (CODING_FOR_UNIBYTE (coding
) ? Qnil
: Qt
);
7256 add_gpm_wait_descriptor (int desc
)
7258 add_keyboard_wait_descriptor (desc
);
7262 delete_gpm_wait_descriptor (int desc
)
7264 delete_keyboard_wait_descriptor (desc
);
7269 # ifdef USABLE_SIGIO
7271 /* Return true if *MASK has a bit set
7272 that corresponds to one of the keyboard input descriptors. */
7275 keyboard_bit_set (fd_set
*mask
)
7279 for (fd
= 0; fd
<= max_input_desc
; fd
++)
7280 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
7281 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
7288 #else /* not subprocesses */
7290 /* Defined in msdos.c. */
7291 extern int sys_select (int, fd_set
*, fd_set
*, fd_set
*,
7292 struct timespec
*, void *);
7294 /* Implementation of wait_reading_process_output, assuming that there
7295 are no subprocesses. Used only by the MS-DOS build.
7297 Wait for timeout to elapse and/or keyboard input to be available.
7301 If negative, gobble data immediately available but don't wait for any.
7304 an additional duration to wait, measured in nanoseconds
7305 If TIME_LIMIT is zero, then:
7306 If NSECS == 0, there is no limit.
7307 If NSECS > 0, the timeout consists of NSECS only.
7308 If NSECS < 0, gobble data immediately, as if TIME_LIMIT were negative.
7311 0 to ignore keyboard input, or
7312 1 to return when input is available, or
7313 -1 means caller will actually read the input, so don't throw to
7316 see full version for other parameters. We know that wait_proc will
7317 always be NULL, since `subprocesses' isn't defined.
7319 DO_DISPLAY means redisplay should be done to show subprocess
7320 output that arrives.
7322 Return -1 signifying we got no output and did not try. */
7325 wait_reading_process_output (intmax_t time_limit
, int nsecs
, int read_kbd
,
7327 Lisp_Object wait_for_cell
,
7328 struct Lisp_Process
*wait_proc
, int just_wait_proc
)
7331 struct timespec end_time
, timeout
;
7332 enum { MINIMUM
= -1, TIMEOUT
, INFINITY
} wait
;
7334 if (TYPE_MAXIMUM (time_t) < time_limit
)
7335 time_limit
= TYPE_MAXIMUM (time_t);
7337 if (time_limit
< 0 || nsecs
< 0)
7339 else if (time_limit
> 0 || nsecs
> 0)
7342 end_time
= timespec_add (current_timespec (),
7343 make_timespec (time_limit
, nsecs
));
7348 /* Turn off periodic alarms (in case they are in use)
7349 and then turn off any other atimers,
7350 because the select emulator uses alarms. */
7352 turn_on_atimers (0);
7356 bool timeout_reduced_for_timers
= false;
7357 fd_set waitchannels
;
7360 /* If calling from keyboard input, do not quit
7361 since we want to return C-g as an input character.
7362 Otherwise, do pending quit if requested. */
7366 /* Exit now if the cell we're waiting for became non-nil. */
7367 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
7370 /* Compute time from now till when time limit is up. */
7371 /* Exit if already run out. */
7372 if (wait
== TIMEOUT
)
7374 struct timespec now
= current_timespec ();
7375 if (timespec_cmp (end_time
, now
) <= 0)
7377 timeout
= timespec_sub (end_time
, now
);
7380 timeout
= make_timespec (wait
< TIMEOUT
? 0 : 100000, 0);
7382 /* If our caller will not immediately handle keyboard events,
7383 run timer events directly.
7384 (Callers that will immediately read keyboard events
7385 call timer_delay on their own.) */
7386 if (NILP (wait_for_cell
))
7388 struct timespec timer_delay
;
7392 unsigned old_timers_run
= timers_run
;
7393 timer_delay
= timer_check ();
7394 if (timers_run
!= old_timers_run
&& do_display
)
7395 /* We must retry, since a timer may have requeued itself
7396 and that could alter the time delay. */
7397 redisplay_preserve_echo_area (14);
7401 while (!detect_input_pending ());
7403 /* If there is unread keyboard input, also return. */
7405 && requeued_events_pending_p ())
7408 if (timespec_valid_p (timer_delay
))
7410 if (timespec_cmp (timer_delay
, timeout
) < 0)
7412 timeout
= timer_delay
;
7413 timeout_reduced_for_timers
= true;
7418 /* Cause C-g and alarm signals to take immediate action,
7419 and cause input available signals to zero out timeout. */
7421 set_waiting_for_input (&timeout
);
7423 /* If a frame has been newly mapped and needs updating,
7424 reprocess its display stuff. */
7425 if (frame_garbaged
&& do_display
)
7427 clear_waiting_for_input ();
7428 redisplay_preserve_echo_area (15);
7430 set_waiting_for_input (&timeout
);
7433 /* Wait till there is something to do. */
7434 FD_ZERO (&waitchannels
);
7435 if (read_kbd
&& detect_input_pending ())
7439 if (read_kbd
|| !NILP (wait_for_cell
))
7440 FD_SET (0, &waitchannels
);
7441 nfds
= pselect (1, &waitchannels
, NULL
, NULL
, &timeout
, NULL
);
7446 /* Make C-g and alarm signals set flags again. */
7447 clear_waiting_for_input ();
7449 /* If we woke up due to SIGWINCH, actually change size now. */
7450 do_pending_window_change (0);
7452 if (wait
< INFINITY
&& nfds
== 0 && ! timeout_reduced_for_timers
)
7453 /* We waited the full specified time, so return now. */
7458 /* If the system call was interrupted, then go around the
7460 if (xerrno
== EINTR
)
7461 FD_ZERO (&waitchannels
);
7463 report_file_errno ("Failed select", Qnil
, xerrno
);
7466 /* Check for keyboard input. */
7469 && detect_input_pending_run_timers (do_display
))
7471 swallow_events (do_display
);
7472 if (detect_input_pending_run_timers (do_display
))
7476 /* If there is unread keyboard input, also return. */
7478 && requeued_events_pending_p ())
7481 /* If wait_for_cell. check for keyboard input
7482 but don't run any timers.
7483 ??? (It seems wrong to me to check for keyboard
7484 input at all when wait_for_cell, but the code
7485 has been this way since July 1994.
7486 Try changing this after version 19.31.) */
7487 if (! NILP (wait_for_cell
)
7488 && detect_input_pending ())
7490 swallow_events (do_display
);
7491 if (detect_input_pending ())
7495 /* Exit now if the cell we're waiting for became non-nil. */
7496 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
7505 #endif /* not subprocesses */
7507 /* The following functions are needed even if async subprocesses are
7508 not supported. Some of them are no-op stubs in that case. */
7512 /* Add FD, which is a descriptor returned by timerfd_create,
7513 to the set of non-keyboard input descriptors. */
7516 add_timer_wait_descriptor (int fd
)
7518 FD_SET (fd
, &input_wait_mask
);
7519 FD_SET (fd
, &non_keyboard_wait_mask
);
7520 FD_SET (fd
, &non_process_wait_mask
);
7521 fd_callback_info
[fd
].func
= timerfd_callback
;
7522 fd_callback_info
[fd
].data
= NULL
;
7523 fd_callback_info
[fd
].condition
|= FOR_READ
;
7524 if (fd
> max_input_desc
)
7525 max_input_desc
= fd
;
7528 #endif /* HAVE_TIMERFD */
7530 /* Add DESC to the set of keyboard input descriptors. */
7533 add_keyboard_wait_descriptor (int desc
)
7535 #ifdef subprocesses /* Actually means "not MSDOS". */
7536 FD_SET (desc
, &input_wait_mask
);
7537 FD_SET (desc
, &non_process_wait_mask
);
7538 if (desc
> max_input_desc
)
7539 max_input_desc
= desc
;
7543 /* From now on, do not expect DESC to give keyboard input. */
7546 delete_keyboard_wait_descriptor (int desc
)
7549 FD_CLR (desc
, &input_wait_mask
);
7550 FD_CLR (desc
, &non_process_wait_mask
);
7551 delete_input_desc (desc
);
7555 /* Setup coding systems of PROCESS. */
7558 setup_process_coding_systems (Lisp_Object process
)
7561 struct Lisp_Process
*p
= XPROCESS (process
);
7563 int outch
= p
->outfd
;
7564 Lisp_Object coding_system
;
7566 if (inch
< 0 || outch
< 0)
7569 if (!proc_decode_coding_system
[inch
])
7570 proc_decode_coding_system
[inch
] = xmalloc (sizeof (struct coding_system
));
7571 coding_system
= p
->decode_coding_system
;
7572 if (EQ (p
->filter
, Qinternal_default_process_filter
)
7573 && BUFFERP (p
->buffer
))
7575 if (NILP (BVAR (XBUFFER (p
->buffer
), enable_multibyte_characters
)))
7576 coding_system
= raw_text_coding_system (coding_system
);
7578 setup_coding_system (coding_system
, proc_decode_coding_system
[inch
]);
7580 if (!proc_encode_coding_system
[outch
])
7581 proc_encode_coding_system
[outch
] = xmalloc (sizeof (struct coding_system
));
7582 setup_coding_system (p
->encode_coding_system
,
7583 proc_encode_coding_system
[outch
]);
7587 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
7588 doc
: /* Return the (or a) live process associated with BUFFER.
7589 BUFFER may be a buffer or the name of one.
7590 Return nil if all processes associated with BUFFER have been
7591 deleted or killed. */)
7592 (register Lisp_Object buffer
)
7595 register Lisp_Object buf
, tail
, proc
;
7597 if (NILP (buffer
)) return Qnil
;
7598 buf
= Fget_buffer (buffer
);
7599 if (NILP (buf
)) return Qnil
;
7601 FOR_EACH_PROCESS (tail
, proc
)
7602 if (EQ (XPROCESS (proc
)->buffer
, buf
))
7604 #endif /* subprocesses */
7608 DEFUN ("process-inherit-coding-system-flag",
7609 Fprocess_inherit_coding_system_flag
, Sprocess_inherit_coding_system_flag
,
7611 doc
: /* Return the value of inherit-coding-system flag for PROCESS.
7612 If this flag is t, `buffer-file-coding-system' of the buffer
7613 associated with PROCESS will inherit the coding system used to decode
7614 the process output. */)
7615 (register Lisp_Object process
)
7618 CHECK_PROCESS (process
);
7619 return XPROCESS (process
)->inherit_coding_system_flag
? Qt
: Qnil
;
7621 /* Ignore the argument and return the value of
7622 inherit-process-coding-system. */
7623 return inherit_process_coding_system
? Qt
: Qnil
;
7627 /* Kill all processes associated with `buffer'.
7628 If `buffer' is nil, kill all processes. */
7631 kill_buffer_processes (Lisp_Object buffer
)
7634 Lisp_Object tail
, proc
;
7636 FOR_EACH_PROCESS (tail
, proc
)
7637 if (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
))
7639 if (NETCONN_P (proc
) || SERIALCONN_P (proc
) || PIPECONN_P (proc
))
7640 Fdelete_process (proc
);
7641 else if (XPROCESS (proc
)->infd
>= 0)
7642 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
7644 #else /* subprocesses */
7645 /* Since we have no subprocesses, this does nothing. */
7646 #endif /* subprocesses */
7649 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
,
7650 Swaiting_for_user_input_p
, 0, 0, 0,
7651 doc
: /* Return non-nil if Emacs is waiting for input from the user.
7652 This is intended for use by asynchronous process output filters and sentinels. */)
7656 return (waiting_for_user_input_p
? Qt
: Qnil
);
7662 /* Stop reading input from keyboard sources. */
7665 hold_keyboard_input (void)
7670 /* Resume reading input from keyboard sources. */
7673 unhold_keyboard_input (void)
7678 /* Return true if keyboard input is on hold, zero otherwise. */
7681 kbd_on_hold_p (void)
7683 return kbd_is_on_hold
;
7687 /* Enumeration of and access to system processes a-la ps(1). */
7689 DEFUN ("list-system-processes", Flist_system_processes
, Slist_system_processes
,
7691 doc
: /* Return a list of numerical process IDs of all running processes.
7692 If this functionality is unsupported, return nil.
7694 See `process-attributes' for getting attributes of a process given its ID. */)
7697 return list_system_processes ();
7700 DEFUN ("process-attributes", Fprocess_attributes
,
7701 Sprocess_attributes
, 1, 1, 0,
7702 doc
: /* Return attributes of the process given by its PID, a number.
7704 Value is an alist where each element is a cons cell of the form
7708 If this functionality is unsupported, the value is nil.
7710 See `list-system-processes' for getting a list of all process IDs.
7712 The KEYs of the attributes that this function may return are listed
7713 below, together with the type of the associated VALUE (in parentheses).
7714 Not all platforms support all of these attributes; unsupported
7715 attributes will not appear in the returned alist.
7716 Unless explicitly indicated otherwise, numbers can have either
7717 integer or floating point values.
7719 euid -- Effective user User ID of the process (number)
7720 user -- User name corresponding to euid (string)
7721 egid -- Effective user Group ID of the process (number)
7722 group -- Group name corresponding to egid (string)
7723 comm -- Command name (executable name only) (string)
7724 state -- Process state code, such as "S", "R", or "T" (string)
7725 ppid -- Parent process ID (number)
7726 pgrp -- Process group ID (number)
7727 sess -- Session ID, i.e. process ID of session leader (number)
7728 ttname -- Controlling tty name (string)
7729 tpgid -- ID of foreground process group on the process's tty (number)
7730 minflt -- number of minor page faults (number)
7731 majflt -- number of major page faults (number)
7732 cminflt -- cumulative number of minor page faults (number)
7733 cmajflt -- cumulative number of major page faults (number)
7734 utime -- user time used by the process, in (current-time) format,
7735 which is a list of integers (HIGH LOW USEC PSEC)
7736 stime -- system time used by the process (current-time)
7737 time -- sum of utime and stime (current-time)
7738 cutime -- user time used by the process and its children (current-time)
7739 cstime -- system time used by the process and its children (current-time)
7740 ctime -- sum of cutime and cstime (current-time)
7741 pri -- priority of the process (number)
7742 nice -- nice value of the process (number)
7743 thcount -- process thread count (number)
7744 start -- time the process started (current-time)
7745 vsize -- virtual memory size of the process in KB's (number)
7746 rss -- resident set size of the process in KB's (number)
7747 etime -- elapsed time the process is running, in (HIGH LOW USEC PSEC) format
7748 pcpu -- percents of CPU time used by the process (floating-point number)
7749 pmem -- percents of total physical memory used by process's resident set
7750 (floating-point number)
7751 args -- command line which invoked the process (string). */)
7754 return system_process_attributes (pid
);
7758 /* Arrange to catch SIGCHLD if this hasn't already been arranged.
7759 Invoke this after init_process_emacs, and after glib and/or GNUstep
7760 futz with the SIGCHLD handler, but before Emacs forks any children.
7761 This function's caller should block SIGCHLD. */
7764 catch_child_signal (void)
7766 struct sigaction action
, old_action
;
7768 emacs_sigaction_init (&action
, deliver_child_signal
);
7769 block_child_signal (&oldset
);
7770 sigaction (SIGCHLD
, &action
, &old_action
);
7771 eassert (old_action
.sa_handler
== SIG_DFL
|| old_action
.sa_handler
== SIG_IGN
7772 || ! (old_action
.sa_flags
& SA_SIGINFO
));
7774 if (old_action
.sa_handler
!= deliver_child_signal
)
7776 = (old_action
.sa_handler
== SIG_DFL
|| old_action
.sa_handler
== SIG_IGN
7778 : old_action
.sa_handler
);
7779 unblock_child_signal (&oldset
);
7781 #endif /* subprocesses */
7784 /* This is not called "init_process" because that is the name of a
7785 Mach system call, so it would cause problems on Darwin systems. */
7787 init_process_emacs (void)
7792 inhibit_sentinels
= 0;
7795 if (! noninteractive
|| initialized
)
7798 #if defined HAVE_GLIB && !defined WINDOWSNT
7799 /* Tickle glib's child-handling code. Ask glib to wait for Emacs itself;
7800 this should always fail, but is enough to initialize glib's
7801 private SIGCHLD handler, allowing catch_child_signal to copy
7802 it into lib_child_handler. */
7803 g_source_unref (g_child_watch_source_new (getpid ()));
7805 catch_child_signal ();
7808 FD_ZERO (&input_wait_mask
);
7809 FD_ZERO (&non_keyboard_wait_mask
);
7810 FD_ZERO (&non_process_wait_mask
);
7811 FD_ZERO (&write_mask
);
7812 max_process_desc
= max_input_desc
= -1;
7813 memset (fd_callback_info
, 0, sizeof (fd_callback_info
));
7815 #ifdef NON_BLOCKING_CONNECT
7816 FD_ZERO (&connect_wait_mask
);
7817 num_pending_connects
= 0;
7820 process_output_delay_count
= 0;
7821 process_output_skip
= 0;
7823 /* Don't do this, it caused infinite select loops. The display
7824 method should call add_keyboard_wait_descriptor on stdin if it
7827 FD_SET (0, &input_wait_mask
);
7830 Vprocess_alist
= Qnil
;
7831 deleted_pid_list
= Qnil
;
7832 for (i
= 0; i
< FD_SETSIZE
; i
++)
7834 chan_process
[i
] = Qnil
;
7835 proc_buffered_char
[i
] = -1;
7837 memset (proc_decode_coding_system
, 0, sizeof proc_decode_coding_system
);
7838 memset (proc_encode_coding_system
, 0, sizeof proc_encode_coding_system
);
7839 #ifdef DATAGRAM_SOCKETS
7840 memset (datagram_address
, 0, sizeof datagram_address
);
7843 #if defined (DARWIN_OS)
7844 /* PTYs are broken on Darwin < 6, but are sometimes useful for interactive
7845 processes. As such, we only change the default value. */
7848 char const *release
= (STRINGP (Voperating_system_release
)
7849 ? SSDATA (Voperating_system_release
)
7851 if (!release
|| !release
[0] || (release
[0] < '7' && release
[1] == '.')) {
7852 Vprocess_connection_type
= Qnil
;
7856 #endif /* subprocesses */
7861 syms_of_process (void)
7865 DEFSYM (Qprocessp
, "processp");
7866 DEFSYM (Qrun
, "run");
7867 DEFSYM (Qstop
, "stop");
7868 DEFSYM (Qsignal
, "signal");
7870 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
7873 DEFSYM (Qopen
, "open");
7874 DEFSYM (Qclosed
, "closed");
7875 DEFSYM (Qconnect
, "connect");
7876 DEFSYM (Qfailed
, "failed");
7877 DEFSYM (Qlisten
, "listen");
7878 DEFSYM (Qlocal
, "local");
7879 DEFSYM (Qipv4
, "ipv4");
7881 DEFSYM (Qipv6
, "ipv6");
7883 DEFSYM (Qdatagram
, "datagram");
7884 DEFSYM (Qseqpacket
, "seqpacket");
7886 DEFSYM (QCport
, ":port");
7887 DEFSYM (QCspeed
, ":speed");
7888 DEFSYM (QCprocess
, ":process");
7890 DEFSYM (QCbytesize
, ":bytesize");
7891 DEFSYM (QCstopbits
, ":stopbits");
7892 DEFSYM (QCparity
, ":parity");
7893 DEFSYM (Qodd
, "odd");
7894 DEFSYM (Qeven
, "even");
7895 DEFSYM (QCflowcontrol
, ":flowcontrol");
7898 DEFSYM (QCsummary
, ":summary");
7900 DEFSYM (Qreal
, "real");
7901 DEFSYM (Qnetwork
, "network");
7902 DEFSYM (Qserial
, "serial");
7903 DEFSYM (Qpipe
, "pipe");
7904 DEFSYM (QCbuffer
, ":buffer");
7905 DEFSYM (QChost
, ":host");
7906 DEFSYM (QCservice
, ":service");
7907 DEFSYM (QClocal
, ":local");
7908 DEFSYM (QCremote
, ":remote");
7909 DEFSYM (QCcoding
, ":coding");
7910 DEFSYM (QCserver
, ":server");
7911 DEFSYM (QCnowait
, ":nowait");
7912 DEFSYM (QCsentinel
, ":sentinel");
7913 DEFSYM (QCtls_parameters
, ":tls-parameters");
7914 DEFSYM (Qnsm_verify_connection
, "nsm-verify-connection");
7915 DEFSYM (QClog
, ":log");
7916 DEFSYM (QCnoquery
, ":noquery");
7917 DEFSYM (QCstop
, ":stop");
7918 DEFSYM (QCplist
, ":plist");
7919 DEFSYM (QCcommand
, ":command");
7920 DEFSYM (QCconnection_type
, ":connection-type");
7921 DEFSYM (QCstderr
, ":stderr");
7922 DEFSYM (Qpty
, "pty");
7923 DEFSYM (Qpipe
, "pipe");
7925 DEFSYM (Qlast_nonmenu_event
, "last-nonmenu-event");
7927 staticpro (&Vprocess_alist
);
7928 staticpro (&deleted_pid_list
);
7930 #endif /* subprocesses */
7932 DEFSYM (QCname
, ":name");
7933 DEFSYM (QCtype
, ":type");
7935 DEFSYM (Qeuid
, "euid");
7936 DEFSYM (Qegid
, "egid");
7937 DEFSYM (Quser
, "user");
7938 DEFSYM (Qgroup
, "group");
7939 DEFSYM (Qcomm
, "comm");
7940 DEFSYM (Qstate
, "state");
7941 DEFSYM (Qppid
, "ppid");
7942 DEFSYM (Qpgrp
, "pgrp");
7943 DEFSYM (Qsess
, "sess");
7944 DEFSYM (Qttname
, "ttname");
7945 DEFSYM (Qtpgid
, "tpgid");
7946 DEFSYM (Qminflt
, "minflt");
7947 DEFSYM (Qmajflt
, "majflt");
7948 DEFSYM (Qcminflt
, "cminflt");
7949 DEFSYM (Qcmajflt
, "cmajflt");
7950 DEFSYM (Qutime
, "utime");
7951 DEFSYM (Qstime
, "stime");
7952 DEFSYM (Qtime
, "time");
7953 DEFSYM (Qcutime
, "cutime");
7954 DEFSYM (Qcstime
, "cstime");
7955 DEFSYM (Qctime
, "ctime");
7957 DEFSYM (Qinternal_default_process_sentinel
,
7958 "internal-default-process-sentinel");
7959 DEFSYM (Qinternal_default_process_filter
,
7960 "internal-default-process-filter");
7962 DEFSYM (Qpri
, "pri");
7963 DEFSYM (Qnice
, "nice");
7964 DEFSYM (Qthcount
, "thcount");
7965 DEFSYM (Qstart
, "start");
7966 DEFSYM (Qvsize
, "vsize");
7967 DEFSYM (Qrss
, "rss");
7968 DEFSYM (Qetime
, "etime");
7969 DEFSYM (Qpcpu
, "pcpu");
7970 DEFSYM (Qpmem
, "pmem");
7971 DEFSYM (Qargs
, "args");
7973 DEFVAR_BOOL ("delete-exited-processes", delete_exited_processes
,
7974 doc
: /* Non-nil means delete processes immediately when they exit.
7975 A value of nil means don't delete them until `list-processes' is run. */);
7977 delete_exited_processes
= 1;
7980 DEFVAR_LISP ("process-connection-type", Vprocess_connection_type
,
7981 doc
: /* Control type of device used to communicate with subprocesses.
7982 Values are nil to use a pipe, or t or `pty' to use a pty.
7983 The value has no effect if the system has no ptys or if all ptys are busy:
7984 then a pipe is used in any case.
7985 The value takes effect when `start-process' is called. */);
7986 Vprocess_connection_type
= Qt
;
7988 DEFVAR_LISP ("process-adaptive-read-buffering", Vprocess_adaptive_read_buffering
,
7989 doc
: /* If non-nil, improve receive buffering by delaying after short reads.
7990 On some systems, when Emacs reads the output from a subprocess, the output data
7991 is read in very small blocks, potentially resulting in very poor performance.
7992 This behavior can be remedied to some extent by setting this variable to a
7993 non-nil value, as it will automatically delay reading from such processes, to
7994 allow them to produce more output before Emacs tries to read it.
7995 If the value is t, the delay is reset after each write to the process; any other
7996 non-nil value means that the delay is not reset on write.
7997 The variable takes effect when `start-process' is called. */);
7998 Vprocess_adaptive_read_buffering
= Qt
;
8000 defsubr (&Sprocessp
);
8001 defsubr (&Sget_process
);
8002 defsubr (&Sdelete_process
);
8003 defsubr (&Sprocess_status
);
8004 defsubr (&Sprocess_exit_status
);
8005 defsubr (&Sprocess_id
);
8006 defsubr (&Sprocess_name
);
8007 defsubr (&Sprocess_tty_name
);
8008 defsubr (&Sprocess_command
);
8009 defsubr (&Sset_process_buffer
);
8010 defsubr (&Sprocess_buffer
);
8011 defsubr (&Sprocess_mark
);
8012 defsubr (&Sset_process_filter
);
8013 defsubr (&Sprocess_filter
);
8014 defsubr (&Sset_process_sentinel
);
8015 defsubr (&Sprocess_sentinel
);
8016 defsubr (&Sset_process_window_size
);
8017 defsubr (&Sset_process_inherit_coding_system_flag
);
8018 defsubr (&Sset_process_query_on_exit_flag
);
8019 defsubr (&Sprocess_query_on_exit_flag
);
8020 defsubr (&Sprocess_contact
);
8021 defsubr (&Sprocess_plist
);
8022 defsubr (&Sset_process_plist
);
8023 defsubr (&Sprocess_list
);
8024 defsubr (&Smake_process
);
8025 defsubr (&Smake_pipe_process
);
8026 defsubr (&Sserial_process_configure
);
8027 defsubr (&Smake_serial_process
);
8028 defsubr (&Sset_network_process_option
);
8029 defsubr (&Smake_network_process
);
8030 defsubr (&Sformat_network_address
);
8031 defsubr (&Snetwork_interface_list
);
8032 defsubr (&Snetwork_interface_info
);
8033 #ifdef DATAGRAM_SOCKETS
8034 defsubr (&Sprocess_datagram_address
);
8035 defsubr (&Sset_process_datagram_address
);
8037 defsubr (&Saccept_process_output
);
8038 defsubr (&Sprocess_send_region
);
8039 defsubr (&Sprocess_send_string
);
8040 defsubr (&Sinterrupt_process
);
8041 defsubr (&Skill_process
);
8042 defsubr (&Squit_process
);
8043 defsubr (&Sstop_process
);
8044 defsubr (&Scontinue_process
);
8045 defsubr (&Sprocess_running_child_p
);
8046 defsubr (&Sprocess_send_eof
);
8047 defsubr (&Ssignal_process
);
8048 defsubr (&Swaiting_for_user_input_p
);
8049 defsubr (&Sprocess_type
);
8050 defsubr (&Sinternal_default_process_sentinel
);
8051 defsubr (&Sinternal_default_process_filter
);
8052 defsubr (&Sset_process_coding_system
);
8053 defsubr (&Sprocess_coding_system
);
8054 defsubr (&Sset_process_filter_multibyte
);
8055 defsubr (&Sprocess_filter_multibyte_p
);
8057 #endif /* subprocesses */
8059 defsubr (&Sget_buffer_process
);
8060 defsubr (&Sprocess_inherit_coding_system_flag
);
8061 defsubr (&Slist_system_processes
);
8062 defsubr (&Sprocess_attributes
);
8065 Lisp_Object subfeatures
= Qnil
;
8066 const struct socket_options
*sopt
;
8068 #define ADD_SUBFEATURE(key, val) \
8069 subfeatures = pure_cons (pure_cons (key, pure_cons (val, Qnil)), subfeatures)
8071 #ifdef NON_BLOCKING_CONNECT
8072 ADD_SUBFEATURE (QCnowait
, Qt
);
8074 #ifdef DATAGRAM_SOCKETS
8075 ADD_SUBFEATURE (QCtype
, Qdatagram
);
8077 #ifdef HAVE_SEQPACKET
8078 ADD_SUBFEATURE (QCtype
, Qseqpacket
);
8080 #ifdef HAVE_LOCAL_SOCKETS
8081 ADD_SUBFEATURE (QCfamily
, Qlocal
);
8083 ADD_SUBFEATURE (QCfamily
, Qipv4
);
8085 ADD_SUBFEATURE (QCfamily
, Qipv6
);
8087 #ifdef HAVE_GETSOCKNAME
8088 ADD_SUBFEATURE (QCservice
, Qt
);
8090 ADD_SUBFEATURE (QCserver
, Qt
);
8092 for (sopt
= socket_options
; sopt
->name
; sopt
++)
8093 subfeatures
= pure_cons (intern_c_string (sopt
->name
), subfeatures
);
8095 Fprovide (intern_c_string ("make-network-process"), subfeatures
);