1 /* Asynchronous subprocess control for GNU Emacs.
3 Copyright (C) 1985-1988, 1993-1996, 1998-1999, 2001-2012
4 Free Software Foundation, Inc.
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/>. */
27 #include <sys/types.h> /* Some typedefs are used in sys/file.h. */
37 /* Only MS-DOS does not define `subprocesses'. */
40 #include <sys/socket.h>
42 #include <netinet/in.h>
43 #include <arpa/inet.h>
45 /* Are local (unix) sockets supported? */
46 #if defined (HAVE_SYS_UN_H)
47 #if !defined (AF_LOCAL) && defined (AF_UNIX)
48 #define AF_LOCAL AF_UNIX
51 #define HAVE_LOCAL_SOCKETS
56 #include <sys/ioctl.h>
57 #if defined (HAVE_NET_IF_H)
59 #endif /* HAVE_NET_IF_H */
61 #if defined (HAVE_IFADDRS_H)
62 /* Must be after net/if.h */
65 /* We only use structs from this header when we use getifaddrs. */
66 #if defined (HAVE_NET_IF_DL_H)
67 #include <net/if_dl.h>
77 #include <netinet/in.h>
78 #include <arpa/nameser.h>
90 #endif /* subprocesses */
97 #include "character.h"
101 #include "termhooks.h"
102 #include "termopts.h"
103 #include "commands.h"
104 #include "keyboard.h"
105 #include "blockinput.h"
106 #include "dispextern.h"
107 #include "composite.h"
109 #include "sysselect.h"
110 #include "syssignal.h"
116 #if defined (USE_GTK) || defined (HAVE_GCONF) || defined (HAVE_GSETTINGS)
117 #include "xgselect.h"
123 Lisp_Object Qeuid
, Qegid
, Qcomm
, Qstate
, Qppid
, Qpgrp
, Qsess
, Qttname
, Qtpgid
;
124 Lisp_Object Qminflt
, Qmajflt
, Qcminflt
, Qcmajflt
, Qutime
, Qstime
, Qcstime
;
125 Lisp_Object Qcutime
, Qpri
, Qnice
, Qthcount
, Qstart
, Qvsize
, Qrss
, Qargs
;
126 Lisp_Object Quser
, Qgroup
, Qetime
, Qpcpu
, Qpmem
, Qtime
, Qctime
;
127 Lisp_Object QCname
, QCtype
;
129 /* Non-zero if keyboard input is on hold, zero otherwise. */
131 static int kbd_is_on_hold
;
133 /* Nonzero means don't run process sentinels. This is used
135 int inhibit_sentinels
;
139 Lisp_Object Qprocessp
;
140 static Lisp_Object Qrun
, Qstop
, Qsignal
;
141 static Lisp_Object Qopen
, Qclosed
, Qconnect
, Qfailed
, Qlisten
;
143 static Lisp_Object Qipv4
, Qdatagram
, Qseqpacket
;
144 static Lisp_Object Qreal
, Qnetwork
, Qserial
;
146 static Lisp_Object Qipv6
;
148 static Lisp_Object QCport
, QCprocess
;
150 Lisp_Object QCbytesize
, QCstopbits
, QCparity
, Qodd
, Qeven
;
151 Lisp_Object QCflowcontrol
, Qhw
, Qsw
, QCsummary
;
152 static Lisp_Object QCbuffer
, QChost
, QCservice
;
153 static Lisp_Object QClocal
, QCremote
, QCcoding
;
154 static Lisp_Object QCserver
, QCnowait
, QCnoquery
, QCstop
;
155 static Lisp_Object QCsentinel
, QClog
, QCoptions
, QCplist
;
156 static Lisp_Object Qlast_nonmenu_event
;
157 /* QCfamily is declared and initialized in xfaces.c,
158 QCfilter in keyboard.c. */
159 extern Lisp_Object QCfamily
, QCfilter
;
161 /* Qexit is declared and initialized in eval.c. */
163 /* QCfamily is defined in xfaces.c. */
164 extern Lisp_Object QCfamily
;
165 /* QCfilter is defined in keyboard.c. */
166 extern Lisp_Object QCfilter
;
168 #define NETCONN_P(p) (EQ (XPROCESS (p)->type, Qnetwork))
169 #define NETCONN1_P(p) (EQ ((p)->type, Qnetwork))
170 #define SERIALCONN_P(p) (EQ (XPROCESS (p)->type, Qserial))
171 #define SERIALCONN1_P(p) (EQ ((p)->type, Qserial))
177 /* Number of events of change of status of a process. */
178 static int process_tick
;
179 /* Number of events for which the user or sentinel has been notified. */
180 static int update_tick
;
182 /* Define NON_BLOCKING_CONNECT if we can support non-blocking connects. */
184 /* Only W32 has this, it really means that select can't take write mask. */
185 #ifdef BROKEN_NON_BLOCKING_CONNECT
186 #undef NON_BLOCKING_CONNECT
187 #define SELECT_CANT_DO_WRITE_MASK
189 #ifndef NON_BLOCKING_CONNECT
191 #if defined (HAVE_GETPEERNAME) || defined (GNU_LINUX)
192 #if defined (O_NONBLOCK) || defined (O_NDELAY)
193 #if defined (EWOULDBLOCK) || defined (EINPROGRESS)
194 #define NON_BLOCKING_CONNECT
195 #endif /* EWOULDBLOCK || EINPROGRESS */
196 #endif /* O_NONBLOCK || O_NDELAY */
197 #endif /* HAVE_GETPEERNAME || GNU_LINUX */
198 #endif /* HAVE_SELECT */
199 #endif /* NON_BLOCKING_CONNECT */
200 #endif /* BROKEN_NON_BLOCKING_CONNECT */
202 /* Define DATAGRAM_SOCKETS if datagrams can be used safely on
203 this system. We need to read full packets, so we need a
204 "non-destructive" select. So we require either native select,
205 or emulation of select using FIONREAD. */
207 #ifdef BROKEN_DATAGRAM_SOCKETS
208 #undef DATAGRAM_SOCKETS
210 #ifndef DATAGRAM_SOCKETS
211 #if defined (HAVE_SELECT) || defined (FIONREAD)
212 #if defined (HAVE_SENDTO) && defined (HAVE_RECVFROM) && defined (EMSGSIZE)
213 #define DATAGRAM_SOCKETS
214 #endif /* HAVE_SENDTO && HAVE_RECVFROM && EMSGSIZE */
215 #endif /* HAVE_SELECT || FIONREAD */
216 #endif /* DATAGRAM_SOCKETS */
217 #endif /* BROKEN_DATAGRAM_SOCKETS */
219 #if defined HAVE_LOCAL_SOCKETS && defined DATAGRAM_SOCKETS
220 # define HAVE_SEQPACKET
223 #if !defined (ADAPTIVE_READ_BUFFERING) && !defined (NO_ADAPTIVE_READ_BUFFERING)
224 #ifdef EMACS_HAS_USECS
225 #define ADAPTIVE_READ_BUFFERING
229 #ifdef ADAPTIVE_READ_BUFFERING
230 #define READ_OUTPUT_DELAY_INCREMENT 10000
231 #define READ_OUTPUT_DELAY_MAX (READ_OUTPUT_DELAY_INCREMENT * 5)
232 #define READ_OUTPUT_DELAY_MAX_MAX (READ_OUTPUT_DELAY_INCREMENT * 7)
234 /* Number of processes which have a non-zero read_output_delay,
235 and therefore might be delayed for adaptive read buffering. */
237 static int process_output_delay_count
;
239 /* Non-zero if any process has non-nil read_output_skip. */
241 static int process_output_skip
;
244 #define process_output_delay_count 0
247 static Lisp_Object
Fget_process (Lisp_Object
);
248 static void create_process (Lisp_Object
, char **, Lisp_Object
);
250 static int keyboard_bit_set (SELECT_TYPE
*);
252 static void deactivate_process (Lisp_Object
);
253 static void status_notify (struct Lisp_Process
*);
254 static int read_process_output (Lisp_Object
, int);
255 static void create_pty (Lisp_Object
);
257 /* If we support a window system, turn on the code to poll periodically
258 to detect C-g. It isn't actually used when doing interrupt input. */
259 #if defined (HAVE_WINDOW_SYSTEM) && !defined (USE_ASYNC_EVENTS)
260 #define POLL_FOR_INPUT
263 static Lisp_Object
get_process (register Lisp_Object name
);
264 static void exec_sentinel (Lisp_Object proc
, Lisp_Object reason
);
266 /* Mask of bits indicating the descriptors that we wait for input on. */
268 static SELECT_TYPE input_wait_mask
;
270 /* Mask that excludes keyboard input descriptor(s). */
272 static SELECT_TYPE non_keyboard_wait_mask
;
274 /* Mask that excludes process input descriptor(s). */
276 static SELECT_TYPE non_process_wait_mask
;
278 /* Mask for selecting for write. */
280 static SELECT_TYPE write_mask
;
282 #ifdef NON_BLOCKING_CONNECT
283 /* Mask of bits indicating the descriptors that we wait for connect to
284 complete on. Once they complete, they are removed from this mask
285 and added to the input_wait_mask and non_keyboard_wait_mask. */
287 static SELECT_TYPE connect_wait_mask
;
289 /* Number of bits set in connect_wait_mask. */
290 static int num_pending_connects
;
291 #endif /* NON_BLOCKING_CONNECT */
293 /* The largest descriptor currently in use for a process object. */
294 static int max_process_desc
;
296 /* The largest descriptor currently in use for input. */
297 static int max_input_desc
;
299 /* Indexed by descriptor, gives the process (if any) for that descriptor */
300 static Lisp_Object chan_process
[MAXDESC
];
302 /* Alist of elements (NAME . PROCESS) */
303 static Lisp_Object Vprocess_alist
;
305 /* Buffered-ahead input char from process, indexed by channel.
306 -1 means empty (no char is buffered).
307 Used on sys V where the only way to tell if there is any
308 output from the process is to read at least one char.
309 Always -1 on systems that support FIONREAD. */
311 static int proc_buffered_char
[MAXDESC
];
313 /* Table of `struct coding-system' for each process. */
314 static struct coding_system
*proc_decode_coding_system
[MAXDESC
];
315 static struct coding_system
*proc_encode_coding_system
[MAXDESC
];
317 #ifdef DATAGRAM_SOCKETS
318 /* Table of `partner address' for datagram sockets. */
319 static struct sockaddr_and_len
{
322 } datagram_address
[MAXDESC
];
323 #define DATAGRAM_CHAN_P(chan) (datagram_address[chan].sa != 0)
324 #define DATAGRAM_CONN_P(proc) (PROCESSP (proc) && datagram_address[XPROCESS (proc)->infd].sa != 0)
326 #define DATAGRAM_CHAN_P(chan) (0)
327 #define DATAGRAM_CONN_P(proc) (0)
330 /* Maximum number of bytes to send to a pty without an eof. */
331 static int pty_max_bytes
;
335 static struct fd_callback_data
341 int condition
; /* mask of the defines above. */
342 } fd_callback_info
[MAXDESC
];
345 /* Add a file descriptor FD to be monitored for when read is possible.
346 When read is possible, call FUNC with argument DATA. */
349 add_read_fd (int fd
, fd_callback func
, void *data
)
351 xassert (fd
< MAXDESC
);
352 add_keyboard_wait_descriptor (fd
);
354 fd_callback_info
[fd
].func
= func
;
355 fd_callback_info
[fd
].data
= data
;
356 fd_callback_info
[fd
].condition
|= FOR_READ
;
359 /* Stop monitoring file descriptor FD for when read is possible. */
362 delete_read_fd (int fd
)
364 xassert (fd
< MAXDESC
);
365 delete_keyboard_wait_descriptor (fd
);
367 fd_callback_info
[fd
].condition
&= ~FOR_READ
;
368 if (fd_callback_info
[fd
].condition
== 0)
370 fd_callback_info
[fd
].func
= 0;
371 fd_callback_info
[fd
].data
= 0;
375 /* Add a file descriptor FD to be monitored for when write is possible.
376 When write is possible, call FUNC with argument DATA. */
379 add_write_fd (int fd
, fd_callback func
, void *data
)
381 xassert (fd
< MAXDESC
);
382 FD_SET (fd
, &write_mask
);
383 if (fd
> max_input_desc
)
386 fd_callback_info
[fd
].func
= func
;
387 fd_callback_info
[fd
].data
= data
;
388 fd_callback_info
[fd
].condition
|= FOR_WRITE
;
391 /* Stop monitoring file descriptor FD for when write is possible. */
394 delete_write_fd (int fd
)
396 int lim
= max_input_desc
;
398 xassert (fd
< MAXDESC
);
399 FD_CLR (fd
, &write_mask
);
400 fd_callback_info
[fd
].condition
&= ~FOR_WRITE
;
401 if (fd_callback_info
[fd
].condition
== 0)
403 fd_callback_info
[fd
].func
= 0;
404 fd_callback_info
[fd
].data
= 0;
406 if (fd
== max_input_desc
)
407 for (fd
= lim
; fd
>= 0; fd
--)
408 if (FD_ISSET (fd
, &input_wait_mask
) || FD_ISSET (fd
, &write_mask
))
418 /* Compute the Lisp form of the process status, p->status, from
419 the numeric status that was returned by `wait'. */
421 static Lisp_Object
status_convert (int);
424 update_status (struct Lisp_Process
*p
)
426 eassert (p
->raw_status_new
);
427 p
->status
= status_convert (p
->raw_status
);
428 p
->raw_status_new
= 0;
431 /* Convert a process status word in Unix format to
432 the list that we use internally. */
435 status_convert (int w
)
438 return Fcons (Qstop
, Fcons (make_number (WSTOPSIG (w
)), Qnil
));
439 else if (WIFEXITED (w
))
440 return Fcons (Qexit
, Fcons (make_number (WRETCODE (w
)),
441 WCOREDUMP (w
) ? Qt
: Qnil
));
442 else if (WIFSIGNALED (w
))
443 return Fcons (Qsignal
, Fcons (make_number (WTERMSIG (w
)),
444 WCOREDUMP (w
) ? Qt
: Qnil
));
449 /* Given a status-list, extract the three pieces of information
450 and store them individually through the three pointers. */
453 decode_status (Lisp_Object l
, Lisp_Object
*symbol
, int *code
, int *coredump
)
467 *code
= XFASTINT (XCAR (tem
));
469 *coredump
= !NILP (tem
);
473 /* Return a string describing a process status list. */
476 status_message (struct Lisp_Process
*p
)
478 Lisp_Object status
= p
->status
;
481 Lisp_Object string
, string2
;
483 decode_status (status
, &symbol
, &code
, &coredump
);
485 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qstop
))
488 synchronize_system_messages_locale ();
489 signame
= strsignal (code
);
491 string
= build_string ("unknown");
496 string
= make_unibyte_string (signame
, strlen (signame
));
497 if (! NILP (Vlocale_coding_system
))
498 string
= (code_convert_string_norecord
499 (string
, Vlocale_coding_system
, 0));
500 c1
= STRING_CHAR (SDATA (string
));
503 Faset (string
, make_number (0), make_number (c2
));
505 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
506 return concat2 (string
, string2
);
508 else if (EQ (symbol
, Qexit
))
511 return build_string (code
== 0 ? "deleted\n" : "connection broken by remote peer\n");
513 return build_string ("finished\n");
514 string
= Fnumber_to_string (make_number (code
));
515 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
516 return concat3 (build_string ("exited abnormally with code "),
519 else if (EQ (symbol
, Qfailed
))
521 string
= Fnumber_to_string (make_number (code
));
522 string2
= build_string ("\n");
523 return concat3 (build_string ("failed with code "),
527 return Fcopy_sequence (Fsymbol_name (symbol
));
532 /* The file name of the pty opened by allocate_pty. */
533 static char pty_name
[24];
535 /* Open an available pty, returning a file descriptor.
536 Return -1 on failure.
537 The file name of the terminal corresponding to the pty
538 is left in the variable pty_name. */
549 for (c
= FIRST_PTY_LETTER
; c
<= 'z'; c
++)
550 for (i
= 0; i
< 16; i
++)
553 #ifdef PTY_NAME_SPRINTF
556 sprintf (pty_name
, "/dev/pty%c%x", c
, i
);
557 #endif /* no PTY_NAME_SPRINTF */
561 #else /* no PTY_OPEN */
563 { /* Some systems name their pseudoterminals so that there are gaps in
564 the usual sequence - for example, on HP9000/S700 systems, there
565 are no pseudoterminals with names ending in 'f'. So we wait for
566 three failures in a row before deciding that we've reached the
568 int failed_count
= 0;
571 if (stat (pty_name
, &stb
) < 0)
574 if (failed_count
>= 3)
581 fd
= emacs_open (pty_name
, O_RDWR
| O_NONBLOCK
, 0);
583 fd
= emacs_open (pty_name
, O_RDWR
| O_NDELAY
, 0);
586 #endif /* no PTY_OPEN */
590 /* check to make certain that both sides are available
591 this avoids a nasty yet stupid bug in rlogins */
592 #ifdef PTY_TTY_NAME_SPRINTF
595 sprintf (pty_name
, "/dev/tty%c%x", c
, i
);
596 #endif /* no PTY_TTY_NAME_SPRINTF */
597 if (access (pty_name
, 6) != 0)
612 #endif /* HAVE_PTYS */
615 make_process (Lisp_Object name
)
617 register Lisp_Object val
, tem
, name1
;
618 register struct Lisp_Process
*p
;
619 char suffix
[sizeof "<>" + INT_STRLEN_BOUND (printmax_t
)];
622 p
= allocate_process ();
630 p
->raw_status_new
= 0;
632 p
->mark
= Fmake_marker ();
633 p
->kill_without_query
= 0;
635 #ifdef ADAPTIVE_READ_BUFFERING
636 p
->adaptive_read_buffering
= 0;
637 p
->read_output_delay
= 0;
638 p
->read_output_skip
= 0;
642 p
->gnutls_initstage
= GNUTLS_STAGE_EMPTY
;
643 /* Default log level. */
644 p
->gnutls_log_level
= 0;
645 /* GnuTLS handshakes attempted for this connection. */
646 p
->gnutls_handshakes_tried
= 0;
648 p
->gnutls_state
= NULL
;
649 p
->gnutls_x509_cred
= NULL
;
650 p
->gnutls_anon_cred
= NULL
;
653 /* If name is already in use, modify it until it is unused. */
658 tem
= Fget_process (name1
);
659 if (NILP (tem
)) break;
660 sprintf (suffix
, "<%"pMd
">", i
);
661 name1
= concat2 (name
, build_string (suffix
));
665 XSETPROCESS (val
, p
);
666 Vprocess_alist
= Fcons (Fcons (name
, val
), Vprocess_alist
);
671 remove_process (register Lisp_Object proc
)
673 register Lisp_Object pair
;
675 pair
= Frassq (proc
, Vprocess_alist
);
676 Vprocess_alist
= Fdelq (pair
, Vprocess_alist
);
678 deactivate_process (proc
);
682 DEFUN ("processp", Fprocessp
, Sprocessp
, 1, 1, 0,
683 doc
: /* Return t if OBJECT is a process. */)
686 return PROCESSP (object
) ? Qt
: Qnil
;
689 DEFUN ("get-process", Fget_process
, Sget_process
, 1, 1, 0,
690 doc
: /* Return the process named NAME, or nil if there is none. */)
691 (register Lisp_Object name
)
696 return Fcdr (Fassoc (name
, Vprocess_alist
));
699 /* This is how commands for the user decode process arguments. It
700 accepts a process, a process name, a buffer, a buffer name, or nil.
701 Buffers denote the first process in the buffer, and nil denotes the
705 get_process (register Lisp_Object name
)
707 register Lisp_Object proc
, obj
;
710 obj
= Fget_process (name
);
712 obj
= Fget_buffer (name
);
714 error ("Process %s does not exist", SDATA (name
));
716 else if (NILP (name
))
717 obj
= Fcurrent_buffer ();
721 /* Now obj should be either a buffer object or a process object.
725 proc
= Fget_buffer_process (obj
);
727 error ("Buffer %s has no process", SDATA (BVAR (XBUFFER (obj
), name
)));
739 /* Fdelete_process promises to immediately forget about the process, but in
740 reality, Emacs needs to remember those processes until they have been
741 treated by sigchld_handler; otherwise this handler would consider the
742 process as being synchronous and say that the synchronous process is
744 static Lisp_Object deleted_pid_list
;
747 DEFUN ("delete-process", Fdelete_process
, Sdelete_process
, 1, 1, 0,
748 doc
: /* Delete PROCESS: kill it and forget about it immediately.
749 PROCESS may be a process, a buffer, the name of a process or buffer, or
750 nil, indicating the current buffer's process. */)
751 (register Lisp_Object process
)
753 register struct Lisp_Process
*p
;
755 process
= get_process (process
);
756 p
= XPROCESS (process
);
758 p
->raw_status_new
= 0;
759 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
761 p
->status
= Fcons (Qexit
, Fcons (make_number (0), Qnil
));
762 p
->tick
= ++process_tick
;
764 redisplay_preserve_echo_area (13);
766 else if (p
->infd
>= 0)
772 /* No problem storing the pid here, as it is still in Vprocess_alist. */
773 deleted_pid_list
= Fcons (make_fixnum_or_float (pid
),
774 /* GC treated elements set to nil. */
775 Fdelq (Qnil
, deleted_pid_list
));
776 /* If the process has already signaled, remove it from the list. */
777 if (p
->raw_status_new
)
780 if (CONSP (p
->status
))
781 symbol
= XCAR (p
->status
);
782 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
))
784 = Fdelete (make_fixnum_or_float (pid
), deleted_pid_list
);
788 Fkill_process (process
, Qnil
);
789 /* Do this now, since remove_process will make sigchld_handler do nothing. */
791 = Fcons (Qsignal
, Fcons (make_number (SIGKILL
), Qnil
));
792 p
->tick
= ++process_tick
;
794 redisplay_preserve_echo_area (13);
797 remove_process (process
);
801 DEFUN ("process-status", Fprocess_status
, Sprocess_status
, 1, 1, 0,
802 doc
: /* Return the status of PROCESS.
803 The returned value is one of the following symbols:
804 run -- for a process that is running.
805 stop -- for a process stopped but continuable.
806 exit -- for a process that has exited.
807 signal -- for a process that has got a fatal signal.
808 open -- for a network stream connection that is open.
809 listen -- for a network stream server that is listening.
810 closed -- for a network stream connection that is closed.
811 connect -- when waiting for a non-blocking connection to complete.
812 failed -- when a non-blocking connection has failed.
813 nil -- if arg is a process name and no such process exists.
814 PROCESS may be a process, a buffer, the name of a process, or
815 nil, indicating the current buffer's process. */)
816 (register Lisp_Object process
)
818 register struct Lisp_Process
*p
;
819 register Lisp_Object status
;
821 if (STRINGP (process
))
822 process
= Fget_process (process
);
824 process
= get_process (process
);
829 p
= XPROCESS (process
);
830 if (p
->raw_status_new
)
834 status
= XCAR (status
);
835 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
837 if (EQ (status
, Qexit
))
839 else if (EQ (p
->command
, Qt
))
841 else if (EQ (status
, Qrun
))
847 DEFUN ("process-exit-status", Fprocess_exit_status
, Sprocess_exit_status
,
849 doc
: /* Return the exit status of PROCESS or the signal number that killed it.
850 If PROCESS has not yet exited or died, return 0. */)
851 (register Lisp_Object process
)
853 CHECK_PROCESS (process
);
854 if (XPROCESS (process
)->raw_status_new
)
855 update_status (XPROCESS (process
));
856 if (CONSP (XPROCESS (process
)->status
))
857 return XCAR (XCDR (XPROCESS (process
)->status
));
858 return make_number (0);
861 DEFUN ("process-id", Fprocess_id
, Sprocess_id
, 1, 1, 0,
862 doc
: /* Return the process id of PROCESS.
863 This is the pid of the external process which PROCESS uses or talks to.
864 For a network connection, this value is nil. */)
865 (register Lisp_Object process
)
869 CHECK_PROCESS (process
);
870 pid
= XPROCESS (process
)->pid
;
871 return (pid
? make_fixnum_or_float (pid
) : Qnil
);
874 DEFUN ("process-name", Fprocess_name
, Sprocess_name
, 1, 1, 0,
875 doc
: /* Return the name of PROCESS, as a string.
876 This is the name of the program invoked in PROCESS,
877 possibly modified to make it unique among process names. */)
878 (register Lisp_Object process
)
880 CHECK_PROCESS (process
);
881 return XPROCESS (process
)->name
;
884 DEFUN ("process-command", Fprocess_command
, Sprocess_command
, 1, 1, 0,
885 doc
: /* Return the command that was executed to start PROCESS.
886 This is a list of strings, the first string being the program executed
887 and the rest of the strings being the arguments given to it.
888 For a network or serial process, this is nil (process is running) or t
889 \(process is stopped). */)
890 (register Lisp_Object process
)
892 CHECK_PROCESS (process
);
893 return XPROCESS (process
)->command
;
896 DEFUN ("process-tty-name", Fprocess_tty_name
, Sprocess_tty_name
, 1, 1, 0,
897 doc
: /* Return the name of the terminal PROCESS uses, or nil if none.
898 This is the terminal that the process itself reads and writes on,
899 not the name of the pty that Emacs uses to talk with that terminal. */)
900 (register Lisp_Object process
)
902 CHECK_PROCESS (process
);
903 return XPROCESS (process
)->tty_name
;
906 DEFUN ("set-process-buffer", Fset_process_buffer
, Sset_process_buffer
,
908 doc
: /* Set buffer associated with PROCESS to BUFFER (a buffer, or nil).
910 (register Lisp_Object process
, Lisp_Object buffer
)
912 struct Lisp_Process
*p
;
914 CHECK_PROCESS (process
);
916 CHECK_BUFFER (buffer
);
917 p
= XPROCESS (process
);
919 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
920 p
->childp
= Fplist_put (p
->childp
, QCbuffer
, buffer
);
921 setup_process_coding_systems (process
);
925 DEFUN ("process-buffer", Fprocess_buffer
, Sprocess_buffer
,
927 doc
: /* Return the buffer PROCESS is associated with.
928 Output from PROCESS is inserted in this buffer unless PROCESS has a filter. */)
929 (register Lisp_Object process
)
931 CHECK_PROCESS (process
);
932 return XPROCESS (process
)->buffer
;
935 DEFUN ("process-mark", Fprocess_mark
, Sprocess_mark
,
937 doc
: /* Return the marker for the end of the last output from PROCESS. */)
938 (register Lisp_Object process
)
940 CHECK_PROCESS (process
);
941 return XPROCESS (process
)->mark
;
944 DEFUN ("set-process-filter", Fset_process_filter
, Sset_process_filter
,
946 doc
: /* Give PROCESS the filter function FILTER; nil means no filter.
947 A value of t means stop accepting output from the process.
949 When a process has a filter, its buffer is not used for output.
950 Instead, each time it does output, the entire string of output is
951 passed to the filter.
953 The filter gets two arguments: the process and the string of output.
954 The string argument is normally a multibyte string, except:
955 - if the process' input coding system is no-conversion or raw-text,
956 it is a unibyte string (the non-converted input), or else
957 - if `default-enable-multibyte-characters' is nil, it is a unibyte
958 string (the result of converting the decoded input multibyte
959 string to unibyte with `string-make-unibyte'). */)
960 (register Lisp_Object process
, Lisp_Object filter
)
962 struct Lisp_Process
*p
;
964 CHECK_PROCESS (process
);
965 p
= XPROCESS (process
);
967 /* Don't signal an error if the process' input file descriptor
968 is closed. This could make debugging Lisp more difficult,
969 for example when doing something like
971 (setq process (start-process ...))
973 (set-process-filter process ...) */
977 if (EQ (filter
, Qt
) && !EQ (p
->status
, Qlisten
))
979 FD_CLR (p
->infd
, &input_wait_mask
);
980 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
982 else if (EQ (p
->filter
, Qt
)
983 /* Network or serial process not stopped: */
984 && !EQ (p
->command
, Qt
))
986 FD_SET (p
->infd
, &input_wait_mask
);
987 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
992 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
993 p
->childp
= Fplist_put (p
->childp
, QCfilter
, filter
);
994 setup_process_coding_systems (process
);
998 DEFUN ("process-filter", Fprocess_filter
, Sprocess_filter
,
1000 doc
: /* Returns the filter function of PROCESS; nil if none.
1001 See `set-process-filter' for more info on filter functions. */)
1002 (register Lisp_Object process
)
1004 CHECK_PROCESS (process
);
1005 return XPROCESS (process
)->filter
;
1008 DEFUN ("set-process-sentinel", Fset_process_sentinel
, Sset_process_sentinel
,
1010 doc
: /* Give PROCESS the sentinel SENTINEL; nil for none.
1011 The sentinel is called as a function when the process changes state.
1012 It gets two arguments: the process, and a string describing the change. */)
1013 (register Lisp_Object process
, Lisp_Object sentinel
)
1015 struct Lisp_Process
*p
;
1017 CHECK_PROCESS (process
);
1018 p
= XPROCESS (process
);
1020 p
->sentinel
= sentinel
;
1021 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
1022 p
->childp
= Fplist_put (p
->childp
, QCsentinel
, sentinel
);
1026 DEFUN ("process-sentinel", Fprocess_sentinel
, Sprocess_sentinel
,
1028 doc
: /* Return the sentinel of PROCESS; nil if none.
1029 See `set-process-sentinel' for more info on sentinels. */)
1030 (register Lisp_Object process
)
1032 CHECK_PROCESS (process
);
1033 return XPROCESS (process
)->sentinel
;
1036 DEFUN ("set-process-window-size", Fset_process_window_size
,
1037 Sset_process_window_size
, 3, 3, 0,
1038 doc
: /* Tell PROCESS that it has logical window size HEIGHT and WIDTH. */)
1039 (register Lisp_Object process
, Lisp_Object height
, Lisp_Object width
)
1041 CHECK_PROCESS (process
);
1042 CHECK_RANGED_INTEGER (0, height
, INT_MAX
);
1043 CHECK_RANGED_INTEGER (0, width
, INT_MAX
);
1045 if (XPROCESS (process
)->infd
< 0
1046 || set_window_size (XPROCESS (process
)->infd
,
1047 XINT (height
), XINT (width
)) <= 0)
1053 DEFUN ("set-process-inherit-coding-system-flag",
1054 Fset_process_inherit_coding_system_flag
,
1055 Sset_process_inherit_coding_system_flag
, 2, 2, 0,
1056 doc
: /* Determine whether buffer of PROCESS will inherit coding-system.
1057 If the second argument FLAG is non-nil, then the variable
1058 `buffer-file-coding-system' of the buffer associated with PROCESS
1059 will be bound to the value of the coding system used to decode
1062 This is useful when the coding system specified for the process buffer
1063 leaves either the character code conversion or the end-of-line conversion
1064 unspecified, or if the coding system used to decode the process output
1065 is more appropriate for saving the process buffer.
1067 Binding the variable `inherit-process-coding-system' to non-nil before
1068 starting the process is an alternative way of setting the inherit flag
1069 for the process which will run. */)
1070 (register Lisp_Object process
, Lisp_Object flag
)
1072 CHECK_PROCESS (process
);
1073 XPROCESS (process
)->inherit_coding_system_flag
= !NILP (flag
);
1077 DEFUN ("set-process-query-on-exit-flag",
1078 Fset_process_query_on_exit_flag
, Sset_process_query_on_exit_flag
,
1080 doc
: /* Specify if query is needed for PROCESS when Emacs is exited.
1081 If the second argument FLAG is non-nil, Emacs will query the user before
1082 exiting or killing a buffer if PROCESS is running. */)
1083 (register Lisp_Object process
, Lisp_Object flag
)
1085 CHECK_PROCESS (process
);
1086 XPROCESS (process
)->kill_without_query
= NILP (flag
);
1090 DEFUN ("process-query-on-exit-flag",
1091 Fprocess_query_on_exit_flag
, Sprocess_query_on_exit_flag
,
1093 doc
: /* Return the current value of query-on-exit flag for PROCESS. */)
1094 (register Lisp_Object process
)
1096 CHECK_PROCESS (process
);
1097 return (XPROCESS (process
)->kill_without_query
? Qnil
: Qt
);
1100 #ifdef DATAGRAM_SOCKETS
1101 static Lisp_Object
Fprocess_datagram_address (Lisp_Object
);
1104 DEFUN ("process-contact", Fprocess_contact
, Sprocess_contact
,
1106 doc
: /* Return the contact info of PROCESS; t for a real child.
1107 For a network or serial connection, the value depends on the optional
1108 KEY arg. If KEY is nil, value is a cons cell of the form (HOST
1109 SERVICE) for a network connection or (PORT SPEED) for a serial
1110 connection. If KEY is t, the complete contact information for the
1111 connection is returned, else the specific value for the keyword KEY is
1112 returned. See `make-network-process' or `make-serial-process' for a
1113 list of keywords. */)
1114 (register Lisp_Object process
, Lisp_Object key
)
1116 Lisp_Object contact
;
1118 CHECK_PROCESS (process
);
1119 contact
= XPROCESS (process
)->childp
;
1121 #ifdef DATAGRAM_SOCKETS
1122 if (DATAGRAM_CONN_P (process
)
1123 && (EQ (key
, Qt
) || EQ (key
, QCremote
)))
1124 contact
= Fplist_put (contact
, QCremote
,
1125 Fprocess_datagram_address (process
));
1128 if ((!NETCONN_P (process
) && !SERIALCONN_P (process
)) || EQ (key
, Qt
))
1130 if (NILP (key
) && NETCONN_P (process
))
1131 return Fcons (Fplist_get (contact
, QChost
),
1132 Fcons (Fplist_get (contact
, QCservice
), Qnil
));
1133 if (NILP (key
) && SERIALCONN_P (process
))
1134 return Fcons (Fplist_get (contact
, QCport
),
1135 Fcons (Fplist_get (contact
, QCspeed
), Qnil
));
1136 return Fplist_get (contact
, key
);
1139 DEFUN ("process-plist", Fprocess_plist
, Sprocess_plist
,
1141 doc
: /* Return the plist of PROCESS. */)
1142 (register Lisp_Object process
)
1144 CHECK_PROCESS (process
);
1145 return XPROCESS (process
)->plist
;
1148 DEFUN ("set-process-plist", Fset_process_plist
, Sset_process_plist
,
1150 doc
: /* Replace the plist of PROCESS with PLIST. Returns PLIST. */)
1151 (register Lisp_Object process
, Lisp_Object plist
)
1153 CHECK_PROCESS (process
);
1156 XPROCESS (process
)->plist
= plist
;
1160 #if 0 /* Turned off because we don't currently record this info
1161 in the process. Perhaps add it. */
1162 DEFUN ("process-connection", Fprocess_connection
, Sprocess_connection
, 1, 1, 0,
1163 doc
: /* Return the connection type of PROCESS.
1164 The value is nil for a pipe, t or `pty' for a pty, or `stream' for
1165 a socket connection. */)
1166 (Lisp_Object process
)
1168 return XPROCESS (process
)->type
;
1172 DEFUN ("process-type", Fprocess_type
, Sprocess_type
, 1, 1, 0,
1173 doc
: /* Return the connection type of PROCESS.
1174 The value is either the symbol `real', `network', or `serial'.
1175 PROCESS may be a process, a buffer, the name of a process or buffer, or
1176 nil, indicating the current buffer's process. */)
1177 (Lisp_Object process
)
1180 proc
= get_process (process
);
1181 return XPROCESS (proc
)->type
;
1184 DEFUN ("format-network-address", Fformat_network_address
, Sformat_network_address
,
1186 doc
: /* Convert network ADDRESS from internal format to a string.
1187 A 4 or 5 element vector represents an IPv4 address (with port number).
1188 An 8 or 9 element vector represents an IPv6 address (with port number).
1189 If optional second argument OMIT-PORT is non-nil, don't include a port
1190 number in the string, even when present in ADDRESS.
1191 Returns nil if format of ADDRESS is invalid. */)
1192 (Lisp_Object address
, Lisp_Object omit_port
)
1197 if (STRINGP (address
)) /* AF_LOCAL */
1200 if (VECTORP (address
)) /* AF_INET or AF_INET6 */
1202 register struct Lisp_Vector
*p
= XVECTOR (address
);
1203 ptrdiff_t size
= p
->header
.size
;
1204 Lisp_Object args
[10];
1207 if (size
== 4 || (size
== 5 && !NILP (omit_port
)))
1209 args
[0] = build_string ("%d.%d.%d.%d");
1214 args
[0] = build_string ("%d.%d.%d.%d:%d");
1217 else if (size
== 8 || (size
== 9 && !NILP (omit_port
)))
1219 args
[0] = build_string ("%x:%x:%x:%x:%x:%x:%x:%x");
1224 args
[0] = build_string ("[%x:%x:%x:%x:%x:%x:%x:%x]:%d");
1230 for (i
= 0; i
< nargs
; i
++)
1232 if (! RANGED_INTEGERP (0, p
->contents
[i
], 65535))
1235 if (nargs
<= 5 /* IPv4 */
1236 && i
< 4 /* host, not port */
1237 && XINT (p
->contents
[i
]) > 255)
1240 args
[i
+1] = p
->contents
[i
];
1243 return Fformat (nargs
+1, args
);
1246 if (CONSP (address
))
1248 Lisp_Object args
[2];
1249 args
[0] = build_string ("<Family %d>");
1250 args
[1] = Fcar (address
);
1251 return Fformat (2, args
);
1257 DEFUN ("process-list", Fprocess_list
, Sprocess_list
, 0, 0, 0,
1258 doc
: /* Return a list of all processes. */)
1261 return Fmapcar (Qcdr
, Vprocess_alist
);
1264 /* Starting asynchronous inferior processes. */
1266 static Lisp_Object
start_process_unwind (Lisp_Object proc
);
1268 DEFUN ("start-process", Fstart_process
, Sstart_process
, 3, MANY
, 0,
1269 doc
: /* Start a program in a subprocess. Return the process object for it.
1270 NAME is name for process. It is modified if necessary to make it unique.
1271 BUFFER is the buffer (or buffer name) to associate with the process.
1273 Process output (both standard output and standard error streams) goes
1274 at end of BUFFER, unless you specify an output stream or filter
1275 function to handle the output. BUFFER may also be nil, meaning that
1276 this process is not associated with any buffer.
1278 PROGRAM is the program file name. It is searched for in `exec-path'
1279 (which see). If nil, just associate a pty with the buffer. Remaining
1280 arguments are strings to give program as arguments.
1282 If you want to separate standard output from standard error, invoke
1283 the command through a shell and redirect one of them using the shell
1286 usage: (start-process NAME BUFFER PROGRAM &rest PROGRAM-ARGS) */)
1287 (ptrdiff_t nargs
, Lisp_Object
*args
)
1289 Lisp_Object buffer
, name
, program
, proc
, current_dir
, tem
;
1290 register unsigned char **new_argv
;
1292 ptrdiff_t count
= SPECPDL_INDEX ();
1296 buffer
= Fget_buffer_create (buffer
);
1298 /* Make sure that the child will be able to chdir to the current
1299 buffer's current directory, or its unhandled equivalent. We
1300 can't just have the child check for an error when it does the
1301 chdir, since it's in a vfork.
1303 We have to GCPRO around this because Fexpand_file_name and
1304 Funhandled_file_name_directory might call a file name handling
1305 function. The argument list is protected by the caller, so all
1306 we really have to worry about is buffer. */
1308 struct gcpro gcpro1
, gcpro2
;
1310 current_dir
= BVAR (current_buffer
, directory
);
1312 GCPRO2 (buffer
, current_dir
);
1314 current_dir
= Funhandled_file_name_directory (current_dir
);
1315 if (NILP (current_dir
))
1316 /* If the file name handler says that current_dir is unreachable, use
1317 a sensible default. */
1318 current_dir
= build_string ("~/");
1319 current_dir
= expand_and_dir_to_file (current_dir
, Qnil
);
1320 if (NILP (Ffile_accessible_directory_p (current_dir
)))
1321 report_file_error ("Setting current directory",
1322 Fcons (BVAR (current_buffer
, directory
), Qnil
));
1328 CHECK_STRING (name
);
1332 if (!NILP (program
))
1333 CHECK_STRING (program
);
1335 proc
= make_process (name
);
1336 /* If an error occurs and we can't start the process, we want to
1337 remove it from the process list. This means that each error
1338 check in create_process doesn't need to call remove_process
1339 itself; it's all taken care of here. */
1340 record_unwind_protect (start_process_unwind
, proc
);
1342 XPROCESS (proc
)->childp
= Qt
;
1343 XPROCESS (proc
)->plist
= Qnil
;
1344 XPROCESS (proc
)->type
= Qreal
;
1345 XPROCESS (proc
)->buffer
= buffer
;
1346 XPROCESS (proc
)->sentinel
= Qnil
;
1347 XPROCESS (proc
)->filter
= Qnil
;
1348 XPROCESS (proc
)->command
= Flist (nargs
- 2, args
+ 2);
1351 /* AKA GNUTLS_INITSTAGE(proc). */
1352 XPROCESS (proc
)->gnutls_initstage
= GNUTLS_STAGE_EMPTY
;
1353 XPROCESS (proc
)->gnutls_cred_type
= Qnil
;
1356 #ifdef ADAPTIVE_READ_BUFFERING
1357 XPROCESS (proc
)->adaptive_read_buffering
1358 = (NILP (Vprocess_adaptive_read_buffering
) ? 0
1359 : EQ (Vprocess_adaptive_read_buffering
, Qt
) ? 1 : 2);
1362 /* Make the process marker point into the process buffer (if any). */
1363 if (BUFFERP (buffer
))
1364 set_marker_both (XPROCESS (proc
)->mark
, buffer
,
1365 BUF_ZV (XBUFFER (buffer
)),
1366 BUF_ZV_BYTE (XBUFFER (buffer
)));
1369 /* Decide coding systems for communicating with the process. Here
1370 we don't setup the structure coding_system nor pay attention to
1371 unibyte mode. They are done in create_process. */
1373 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
1374 Lisp_Object coding_systems
= Qt
;
1375 Lisp_Object val
, *args2
;
1376 struct gcpro gcpro1
, gcpro2
;
1378 val
= Vcoding_system_for_read
;
1381 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof *args2
);
1382 args2
[0] = Qstart_process
;
1383 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1384 GCPRO2 (proc
, current_dir
);
1385 if (!NILP (program
))
1386 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1388 if (CONSP (coding_systems
))
1389 val
= XCAR (coding_systems
);
1390 else if (CONSP (Vdefault_process_coding_system
))
1391 val
= XCAR (Vdefault_process_coding_system
);
1393 XPROCESS (proc
)->decode_coding_system
= val
;
1395 val
= Vcoding_system_for_write
;
1398 if (EQ (coding_systems
, Qt
))
1400 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof *args2
);
1401 args2
[0] = Qstart_process
;
1402 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1403 GCPRO2 (proc
, current_dir
);
1404 if (!NILP (program
))
1405 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1408 if (CONSP (coding_systems
))
1409 val
= XCDR (coding_systems
);
1410 else if (CONSP (Vdefault_process_coding_system
))
1411 val
= XCDR (Vdefault_process_coding_system
);
1413 XPROCESS (proc
)->encode_coding_system
= val
;
1414 /* Note: At this moment, the above coding system may leave
1415 text-conversion or eol-conversion unspecified. They will be
1416 decided after we read output from the process and decode it by
1417 some coding system, or just before we actually send a text to
1422 XPROCESS (proc
)->decoding_buf
= empty_unibyte_string
;
1423 XPROCESS (proc
)->decoding_carryover
= 0;
1424 XPROCESS (proc
)->encoding_buf
= empty_unibyte_string
;
1426 XPROCESS (proc
)->inherit_coding_system_flag
1427 = !(NILP (buffer
) || !inherit_process_coding_system
);
1429 if (!NILP (program
))
1431 /* If program file name is not absolute, search our path for it.
1432 Put the name we will really use in TEM. */
1433 if (!IS_DIRECTORY_SEP (SREF (program
, 0))
1434 && !(SCHARS (program
) > 1
1435 && IS_DEVICE_SEP (SREF (program
, 1))))
1437 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1440 GCPRO4 (name
, program
, buffer
, current_dir
);
1441 openp (Vexec_path
, program
, Vexec_suffixes
, &tem
, make_number (X_OK
));
1444 report_file_error ("Searching for program", Fcons (program
, Qnil
));
1445 tem
= Fexpand_file_name (tem
, Qnil
);
1449 if (!NILP (Ffile_directory_p (program
)))
1450 error ("Specified program for new process is a directory");
1454 /* If program file name starts with /: for quoting a magic name,
1456 if (SBYTES (tem
) > 2 && SREF (tem
, 0) == '/'
1457 && SREF (tem
, 1) == ':')
1458 tem
= Fsubstring (tem
, make_number (2), Qnil
);
1461 Lisp_Object arg_encoding
= Qnil
;
1462 struct gcpro gcpro1
;
1465 /* Encode the file name and put it in NEW_ARGV.
1466 That's where the child will use it to execute the program. */
1467 tem
= Fcons (ENCODE_FILE (tem
), Qnil
);
1469 /* Here we encode arguments by the coding system used for sending
1470 data to the process. We don't support using different coding
1471 systems for encoding arguments and for encoding data sent to the
1474 for (i
= 3; i
< nargs
; i
++)
1476 tem
= Fcons (args
[i
], tem
);
1477 CHECK_STRING (XCAR (tem
));
1478 if (STRING_MULTIBYTE (XCAR (tem
)))
1480 if (NILP (arg_encoding
))
1481 arg_encoding
= (complement_process_encoding_system
1482 (XPROCESS (proc
)->encode_coding_system
));
1484 code_convert_string_norecord
1485 (XCAR (tem
), arg_encoding
, 1));
1492 /* Now that everything is encoded we can collect the strings into
1494 new_argv
= (unsigned char **) alloca ((nargs
- 1) * sizeof (char *));
1495 new_argv
[nargs
- 2] = 0;
1497 for (i
= nargs
- 2; i
-- != 0; )
1499 new_argv
[i
] = SDATA (XCAR (tem
));
1503 create_process (proc
, (char **) new_argv
, current_dir
);
1508 return unbind_to (count
, proc
);
1511 /* This function is the unwind_protect form for Fstart_process. If
1512 PROC doesn't have its pid set, then we know someone has signaled
1513 an error and the process wasn't started successfully, so we should
1514 remove it from the process list. */
1516 start_process_unwind (Lisp_Object proc
)
1518 if (!PROCESSP (proc
))
1521 /* Was PROC started successfully?
1522 -2 is used for a pty with no process, eg for gdb. */
1523 if (XPROCESS (proc
)->pid
<= 0 && XPROCESS (proc
)->pid
!= -2)
1524 remove_process (proc
);
1530 create_process_1 (struct atimer
*timer
)
1532 /* Nothing to do. */
1537 create_process (Lisp_Object process
, char **new_argv
, Lisp_Object current_dir
)
1539 int inchannel
, outchannel
;
1542 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
1543 int wait_child_setup
[2];
1547 struct sigaction sigint_action
;
1548 struct sigaction sigquit_action
;
1549 struct sigaction sigpipe_action
;
1551 struct sigaction sighup_action
;
1553 /* Use volatile to protect variables from being clobbered by longjmp. */
1554 volatile int forkin
, forkout
;
1555 volatile int pty_flag
= 0;
1557 extern char **environ
;
1560 inchannel
= outchannel
= -1;
1563 if (!NILP (Vprocess_connection_type
))
1564 outchannel
= inchannel
= allocate_pty ();
1568 #if ! defined (USG) || defined (USG_SUBTTY_WORKS)
1569 /* On most USG systems it does not work to open the pty's tty here,
1570 then close it and reopen it in the child. */
1572 /* Don't let this terminal become our controlling terminal
1573 (in case we don't have one). */
1574 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1576 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
, 0);
1579 report_file_error ("Opening pty", Qnil
);
1581 forkin
= forkout
= -1;
1582 #endif /* not USG, or USG_SUBTTY_WORKS */
1586 #endif /* HAVE_PTYS */
1591 report_file_error ("Creating pipe", Qnil
);
1597 emacs_close (inchannel
);
1598 emacs_close (forkout
);
1599 report_file_error ("Creating pipe", Qnil
);
1605 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
1609 tem
= pipe (wait_child_setup
);
1611 report_file_error ("Creating pipe", Qnil
);
1612 tem
= fcntl (wait_child_setup
[1], F_GETFD
, 0);
1614 tem
= fcntl (wait_child_setup
[1], F_SETFD
, tem
| FD_CLOEXEC
);
1617 emacs_close (wait_child_setup
[0]);
1618 emacs_close (wait_child_setup
[1]);
1619 report_file_error ("Setting file descriptor flags", Qnil
);
1625 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1626 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
1629 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1630 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
1634 /* Record this as an active process, with its channels.
1635 As a result, child_setup will close Emacs's side of the pipes. */
1636 chan_process
[inchannel
] = process
;
1637 XPROCESS (process
)->infd
= inchannel
;
1638 XPROCESS (process
)->outfd
= outchannel
;
1640 /* Previously we recorded the tty descriptor used in the subprocess.
1641 It was only used for getting the foreground tty process, so now
1642 we just reopen the device (see emacs_get_tty_pgrp) as this is
1643 more portable (see USG_SUBTTY_WORKS above). */
1645 XPROCESS (process
)->pty_flag
= pty_flag
;
1646 XPROCESS (process
)->status
= Qrun
;
1648 /* Delay interrupts until we have a chance to store
1649 the new fork's pid in its process structure */
1650 sigemptyset (&blocked
);
1652 sigaddset (&blocked
, SIGCHLD
);
1654 #ifdef HAVE_WORKING_VFORK
1655 /* On many hosts (e.g. Solaris 2.4), if a vforked child calls `signal',
1656 this sets the parent's signal handlers as well as the child's.
1657 So delay all interrupts whose handlers the child might munge,
1658 and record the current handlers so they can be restored later. */
1659 sigaddset (&blocked
, SIGINT
); sigaction (SIGINT
, 0, &sigint_action
);
1660 sigaddset (&blocked
, SIGQUIT
); sigaction (SIGQUIT
, 0, &sigquit_action
);
1661 sigaddset (&blocked
, SIGPIPE
); sigaction (SIGPIPE
, 0, &sigpipe_action
);
1663 sigaddset (&blocked
, SIGHUP
); sigaction (SIGHUP
, 0, &sighup_action
);
1665 #endif /* HAVE_WORKING_VFORK */
1666 pthread_sigmask (SIG_BLOCK
, &blocked
, &procmask
);
1668 FD_SET (inchannel
, &input_wait_mask
);
1669 FD_SET (inchannel
, &non_keyboard_wait_mask
);
1670 if (inchannel
> max_process_desc
)
1671 max_process_desc
= inchannel
;
1673 /* Until we store the proper pid, enable sigchld_handler
1674 to recognize an unknown pid as standing for this process.
1675 It is very important not to let this `marker' value stay
1676 in the table after this function has returned; if it does
1677 it might cause call-process to hang and subsequent asynchronous
1678 processes to get their return values scrambled. */
1679 XPROCESS (process
)->pid
= -1;
1681 /* This must be called after the above line because it may signal an
1683 setup_process_coding_systems (process
);
1688 /* child_setup must clobber environ on systems with true vfork.
1689 Protect it from permanent change. */
1690 char **save_environ
= environ
;
1691 volatile Lisp_Object encoded_current_dir
= ENCODE_FILE (current_dir
);
1696 #endif /* not WINDOWSNT */
1698 int xforkin
= forkin
;
1699 int xforkout
= forkout
;
1701 #if 0 /* This was probably a mistake--it duplicates code later on,
1702 but fails to handle all the cases. */
1703 /* Make sure SIGCHLD is not blocked in the child. */
1704 sigsetmask (SIGEMPTYMASK
);
1707 /* Make the pty be the controlling terminal of the process. */
1709 /* First, disconnect its current controlling terminal. */
1711 /* We tried doing setsid only if pty_flag, but it caused
1712 process_set_signal to fail on SGI when using a pipe. */
1714 /* Make the pty's terminal the controlling terminal. */
1715 if (pty_flag
&& xforkin
>= 0)
1718 /* We ignore the return value
1719 because faith@cs.unc.edu says that is necessary on Linux. */
1720 ioctl (xforkin
, TIOCSCTTY
, 0);
1723 #else /* not HAVE_SETSID */
1725 /* It's very important to call setpgrp here and no time
1726 afterwards. Otherwise, we lose our controlling tty which
1727 is set when we open the pty. */
1730 #endif /* not HAVE_SETSID */
1731 #if defined (LDISC1)
1732 if (pty_flag
&& xforkin
>= 0)
1735 tcgetattr (xforkin
, &t
);
1737 if (tcsetattr (xforkin
, TCSANOW
, &t
) < 0)
1738 emacs_write (1, "create_process/tcsetattr LDISC1 failed\n", 39);
1741 #if defined (NTTYDISC) && defined (TIOCSETD)
1742 if (pty_flag
&& xforkin
>= 0)
1744 /* Use new line discipline. */
1745 int ldisc
= NTTYDISC
;
1746 ioctl (xforkin
, TIOCSETD
, &ldisc
);
1751 /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you
1752 can do TIOCSPGRP only to the process's controlling tty. */
1755 /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here?
1756 I can't test it since I don't have 4.3. */
1757 int j
= emacs_open ("/dev/tty", O_RDWR
, 0);
1760 ioctl (j
, TIOCNOTTY
, 0);
1764 /* In order to get a controlling terminal on some versions
1765 of BSD, it is necessary to put the process in pgrp 0
1766 before it opens the terminal. */
1774 #endif /* TIOCNOTTY */
1776 #if !defined (DONT_REOPEN_PTY)
1777 /*** There is a suggestion that this ought to be a
1778 conditional on TIOCSPGRP,
1779 or !(defined (HAVE_SETSID) && defined (TIOCSCTTY)).
1780 Trying the latter gave the wrong results on Debian GNU/Linux 1.1;
1781 that system does seem to need this code, even though
1782 both HAVE_SETSID and TIOCSCTTY are defined. */
1783 /* Now close the pty (if we had it open) and reopen it.
1784 This makes the pty the controlling terminal of the subprocess. */
1788 /* I wonder if emacs_close (emacs_open (pty_name, ...))
1791 emacs_close (xforkin
);
1792 xforkout
= xforkin
= emacs_open (pty_name
, O_RDWR
, 0);
1796 emacs_write (1, "Couldn't open the pty terminal ", 31);
1797 emacs_write (1, pty_name
, strlen (pty_name
));
1798 emacs_write (1, "\n", 1);
1803 #endif /* not DONT_REOPEN_PTY */
1805 #ifdef SETUP_SLAVE_PTY
1810 #endif /* SETUP_SLAVE_PTY */
1812 /* On AIX, we've disabled SIGHUP above once we start a child on a pty.
1813 Now reenable it in the child, so it will die when we want it to. */
1815 signal (SIGHUP
, SIG_DFL
);
1817 #endif /* HAVE_PTYS */
1819 signal (SIGINT
, SIG_DFL
);
1820 signal (SIGQUIT
, SIG_DFL
);
1821 /* GConf causes us to ignore SIGPIPE, make sure it is restored
1823 signal (SIGPIPE
, SIG_DFL
);
1825 /* Stop blocking signals in the child. */
1826 pthread_sigmask (SIG_SETMASK
, &procmask
, 0);
1829 child_setup_tty (xforkout
);
1831 pid
= child_setup (xforkin
, xforkout
, xforkout
,
1832 new_argv
, 1, encoded_current_dir
);
1833 #else /* not WINDOWSNT */
1835 emacs_close (wait_child_setup
[0]);
1837 child_setup (xforkin
, xforkout
, xforkout
,
1838 new_argv
, 1, encoded_current_dir
);
1839 #endif /* not WINDOWSNT */
1841 environ
= save_environ
;
1846 /* This runs in the Emacs process. */
1850 emacs_close (forkin
);
1851 if (forkin
!= forkout
&& forkout
>= 0)
1852 emacs_close (forkout
);
1856 /* vfork succeeded. */
1857 XPROCESS (process
)->pid
= pid
;
1860 register_child (pid
, inchannel
);
1861 #endif /* WINDOWSNT */
1863 /* If the subfork execv fails, and it exits,
1864 this close hangs. I don't know why.
1865 So have an interrupt jar it loose. */
1867 struct atimer
*timer
;
1871 EMACS_SET_SECS_USECS (offset
, 1, 0);
1872 timer
= start_atimer (ATIMER_RELATIVE
, offset
, create_process_1
, 0);
1875 emacs_close (forkin
);
1877 cancel_atimer (timer
);
1881 if (forkin
!= forkout
&& forkout
>= 0)
1882 emacs_close (forkout
);
1886 XPROCESS (process
)->tty_name
= build_string (pty_name
);
1889 XPROCESS (process
)->tty_name
= Qnil
;
1891 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
1892 /* Wait for child_setup to complete in case that vfork is
1893 actually defined as fork. The descriptor wait_child_setup[1]
1894 of a pipe is closed at the child side either by close-on-exec
1895 on successful execvp or the _exit call in child_setup. */
1899 emacs_close (wait_child_setup
[1]);
1900 emacs_read (wait_child_setup
[0], &dummy
, 1);
1901 emacs_close (wait_child_setup
[0]);
1906 /* Restore the signal state whether vfork succeeded or not.
1907 (We will signal an error, below, if it failed.) */
1908 #ifdef HAVE_WORKING_VFORK
1909 /* Restore the parent's signal handlers. */
1910 sigaction (SIGINT
, &sigint_action
, 0);
1911 sigaction (SIGQUIT
, &sigquit_action
, 0);
1912 sigaction (SIGPIPE
, &sigpipe_action
, 0);
1914 sigaction (SIGHUP
, &sighup_action
, 0);
1916 #endif /* HAVE_WORKING_VFORK */
1917 /* Stop blocking signals in the parent. */
1918 pthread_sigmask (SIG_SETMASK
, &procmask
, 0);
1920 /* Now generate the error if vfork failed. */
1922 report_file_error ("Doing vfork", Qnil
);
1926 create_pty (Lisp_Object process
)
1928 int inchannel
, outchannel
;
1931 inchannel
= outchannel
= -1;
1934 if (!NILP (Vprocess_connection_type
))
1935 outchannel
= inchannel
= allocate_pty ();
1939 #if ! defined (USG) || defined (USG_SUBTTY_WORKS)
1940 /* On most USG systems it does not work to open the pty's tty here,
1941 then close it and reopen it in the child. */
1943 /* Don't let this terminal become our controlling terminal
1944 (in case we don't have one). */
1945 int forkout
= emacs_open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1947 int forkout
= emacs_open (pty_name
, O_RDWR
, 0);
1950 report_file_error ("Opening pty", Qnil
);
1951 #if defined (DONT_REOPEN_PTY)
1952 /* In the case that vfork is defined as fork, the parent process
1953 (Emacs) may send some data before the child process completes
1954 tty options setup. So we setup tty before forking. */
1955 child_setup_tty (forkout
);
1956 #endif /* DONT_REOPEN_PTY */
1957 #endif /* not USG, or USG_SUBTTY_WORKS */
1960 #endif /* HAVE_PTYS */
1963 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1964 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
1967 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1968 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
1972 /* Record this as an active process, with its channels.
1973 As a result, child_setup will close Emacs's side of the pipes. */
1974 chan_process
[inchannel
] = process
;
1975 XPROCESS (process
)->infd
= inchannel
;
1976 XPROCESS (process
)->outfd
= outchannel
;
1978 /* Previously we recorded the tty descriptor used in the subprocess.
1979 It was only used for getting the foreground tty process, so now
1980 we just reopen the device (see emacs_get_tty_pgrp) as this is
1981 more portable (see USG_SUBTTY_WORKS above). */
1983 XPROCESS (process
)->pty_flag
= pty_flag
;
1984 XPROCESS (process
)->status
= Qrun
;
1985 setup_process_coding_systems (process
);
1987 FD_SET (inchannel
, &input_wait_mask
);
1988 FD_SET (inchannel
, &non_keyboard_wait_mask
);
1989 if (inchannel
> max_process_desc
)
1990 max_process_desc
= inchannel
;
1992 XPROCESS (process
)->pid
= -2;
1995 XPROCESS (process
)->tty_name
= build_string (pty_name
);
1998 XPROCESS (process
)->tty_name
= Qnil
;
2002 /* Convert an internal struct sockaddr to a lisp object (vector or string).
2003 The address family of sa is not included in the result. */
2006 conv_sockaddr_to_lisp (struct sockaddr
*sa
, int len
)
2008 Lisp_Object address
;
2011 register struct Lisp_Vector
*p
;
2013 /* Workaround for a bug in getsockname on BSD: Names bound to
2014 sockets in the UNIX domain are inaccessible; getsockname returns
2015 a zero length name. */
2016 if (len
< offsetof (struct sockaddr
, sa_family
) + sizeof (sa
->sa_family
))
2017 return empty_unibyte_string
;
2019 switch (sa
->sa_family
)
2023 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2024 len
= sizeof (sin
->sin_addr
) + 1;
2025 address
= Fmake_vector (make_number (len
), Qnil
);
2026 p
= XVECTOR (address
);
2027 p
->contents
[--len
] = make_number (ntohs (sin
->sin_port
));
2028 cp
= (unsigned char *) &sin
->sin_addr
;
2034 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*) sa
;
2035 uint16_t *ip6
= (uint16_t *) &sin6
->sin6_addr
;
2036 len
= sizeof (sin6
->sin6_addr
)/2 + 1;
2037 address
= Fmake_vector (make_number (len
), Qnil
);
2038 p
= XVECTOR (address
);
2039 p
->contents
[--len
] = make_number (ntohs (sin6
->sin6_port
));
2040 for (i
= 0; i
< len
; i
++)
2041 p
->contents
[i
] = make_number (ntohs (ip6
[i
]));
2045 #ifdef HAVE_LOCAL_SOCKETS
2048 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2049 for (i
= 0; i
< sizeof (sockun
->sun_path
); i
++)
2050 if (sockun
->sun_path
[i
] == 0)
2052 return make_unibyte_string (sockun
->sun_path
, i
);
2056 len
-= offsetof (struct sockaddr
, sa_family
) + sizeof (sa
->sa_family
);
2057 address
= Fcons (make_number (sa
->sa_family
),
2058 Fmake_vector (make_number (len
), Qnil
));
2059 p
= XVECTOR (XCDR (address
));
2060 cp
= (unsigned char *) &sa
->sa_family
+ sizeof (sa
->sa_family
);
2066 p
->contents
[i
++] = make_number (*cp
++);
2072 /* Get family and required size for sockaddr structure to hold ADDRESS. */
2075 get_lisp_to_sockaddr_size (Lisp_Object address
, int *familyp
)
2077 register struct Lisp_Vector
*p
;
2079 if (VECTORP (address
))
2081 p
= XVECTOR (address
);
2082 if (p
->header
.size
== 5)
2085 return sizeof (struct sockaddr_in
);
2088 else if (p
->header
.size
== 9)
2090 *familyp
= AF_INET6
;
2091 return sizeof (struct sockaddr_in6
);
2095 #ifdef HAVE_LOCAL_SOCKETS
2096 else if (STRINGP (address
))
2098 *familyp
= AF_LOCAL
;
2099 return sizeof (struct sockaddr_un
);
2102 else if (CONSP (address
) && TYPE_RANGED_INTEGERP (int, XCAR (address
))
2103 && VECTORP (XCDR (address
)))
2105 struct sockaddr
*sa
;
2106 *familyp
= XINT (XCAR (address
));
2107 p
= XVECTOR (XCDR (address
));
2108 return p
->header
.size
+ sizeof (sa
->sa_family
);
2113 /* Convert an address object (vector or string) to an internal sockaddr.
2115 The address format has been basically validated by
2116 get_lisp_to_sockaddr_size, but this does not mean FAMILY is valid;
2117 it could have come from user data. So if FAMILY is not valid,
2118 we return after zeroing *SA. */
2121 conv_lisp_to_sockaddr (int family
, Lisp_Object address
, struct sockaddr
*sa
, int len
)
2123 register struct Lisp_Vector
*p
;
2124 register unsigned char *cp
= NULL
;
2128 memset (sa
, 0, len
);
2130 if (VECTORP (address
))
2132 p
= XVECTOR (address
);
2133 if (family
== AF_INET
)
2135 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2136 len
= sizeof (sin
->sin_addr
) + 1;
2137 hostport
= XINT (p
->contents
[--len
]);
2138 sin
->sin_port
= htons (hostport
);
2139 cp
= (unsigned char *)&sin
->sin_addr
;
2140 sa
->sa_family
= family
;
2143 else if (family
== AF_INET6
)
2145 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*) sa
;
2146 uint16_t *ip6
= (uint16_t *)&sin6
->sin6_addr
;
2147 len
= sizeof (sin6
->sin6_addr
) + 1;
2148 hostport
= XINT (p
->contents
[--len
]);
2149 sin6
->sin6_port
= htons (hostport
);
2150 for (i
= 0; i
< len
; i
++)
2151 if (INTEGERP (p
->contents
[i
]))
2153 int j
= XFASTINT (p
->contents
[i
]) & 0xffff;
2156 sa
->sa_family
= family
;
2163 else if (STRINGP (address
))
2165 #ifdef HAVE_LOCAL_SOCKETS
2166 if (family
== AF_LOCAL
)
2168 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2169 cp
= SDATA (address
);
2170 for (i
= 0; i
< sizeof (sockun
->sun_path
) && *cp
; i
++)
2171 sockun
->sun_path
[i
] = *cp
++;
2172 sa
->sa_family
= family
;
2179 p
= XVECTOR (XCDR (address
));
2180 cp
= (unsigned char *)sa
+ sizeof (sa
->sa_family
);
2183 for (i
= 0; i
< len
; i
++)
2184 if (INTEGERP (p
->contents
[i
]))
2185 *cp
++ = XFASTINT (p
->contents
[i
]) & 0xff;
2188 #ifdef DATAGRAM_SOCKETS
2189 DEFUN ("process-datagram-address", Fprocess_datagram_address
, Sprocess_datagram_address
,
2191 doc
: /* Get the current datagram address associated with PROCESS. */)
2192 (Lisp_Object process
)
2196 CHECK_PROCESS (process
);
2198 if (!DATAGRAM_CONN_P (process
))
2201 channel
= XPROCESS (process
)->infd
;
2202 return conv_sockaddr_to_lisp (datagram_address
[channel
].sa
,
2203 datagram_address
[channel
].len
);
2206 DEFUN ("set-process-datagram-address", Fset_process_datagram_address
, Sset_process_datagram_address
,
2208 doc
: /* Set the datagram address for PROCESS to ADDRESS.
2209 Returns nil upon error setting address, ADDRESS otherwise. */)
2210 (Lisp_Object process
, Lisp_Object address
)
2215 CHECK_PROCESS (process
);
2217 if (!DATAGRAM_CONN_P (process
))
2220 channel
= XPROCESS (process
)->infd
;
2222 len
= get_lisp_to_sockaddr_size (address
, &family
);
2223 if (datagram_address
[channel
].len
!= len
)
2225 conv_lisp_to_sockaddr (family
, address
, datagram_address
[channel
].sa
, len
);
2231 static const struct socket_options
{
2232 /* The name of this option. Should be lowercase version of option
2233 name without SO_ prefix. */
2235 /* Option level SOL_... */
2237 /* Option number SO_... */
2239 enum { SOPT_UNKNOWN
, SOPT_BOOL
, SOPT_INT
, SOPT_IFNAME
, SOPT_LINGER
} opttype
;
2240 enum { OPIX_NONE
=0, OPIX_MISC
=1, OPIX_REUSEADDR
=2 } optbit
;
2241 } socket_options
[] =
2243 #ifdef SO_BINDTODEVICE
2244 { ":bindtodevice", SOL_SOCKET
, SO_BINDTODEVICE
, SOPT_IFNAME
, OPIX_MISC
},
2247 { ":broadcast", SOL_SOCKET
, SO_BROADCAST
, SOPT_BOOL
, OPIX_MISC
},
2250 { ":dontroute", SOL_SOCKET
, SO_DONTROUTE
, SOPT_BOOL
, OPIX_MISC
},
2253 { ":keepalive", SOL_SOCKET
, SO_KEEPALIVE
, SOPT_BOOL
, OPIX_MISC
},
2256 { ":linger", SOL_SOCKET
, SO_LINGER
, SOPT_LINGER
, OPIX_MISC
},
2259 { ":oobinline", SOL_SOCKET
, SO_OOBINLINE
, SOPT_BOOL
, OPIX_MISC
},
2262 { ":priority", SOL_SOCKET
, SO_PRIORITY
, SOPT_INT
, OPIX_MISC
},
2265 { ":reuseaddr", SOL_SOCKET
, SO_REUSEADDR
, SOPT_BOOL
, OPIX_REUSEADDR
},
2267 { 0, 0, 0, SOPT_UNKNOWN
, OPIX_NONE
}
2270 /* Set option OPT to value VAL on socket S.
2272 Returns (1<<socket_options[OPT].optbit) if option is known, 0 otherwise.
2273 Signals an error if setting a known option fails.
2277 set_socket_option (int s
, Lisp_Object opt
, Lisp_Object val
)
2280 const struct socket_options
*sopt
;
2285 name
= SSDATA (SYMBOL_NAME (opt
));
2286 for (sopt
= socket_options
; sopt
->name
; sopt
++)
2287 if (strcmp (name
, sopt
->name
) == 0)
2290 switch (sopt
->opttype
)
2295 optval
= NILP (val
) ? 0 : 1;
2296 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2297 &optval
, sizeof (optval
));
2304 if (TYPE_RANGED_INTEGERP (int, val
))
2305 optval
= XINT (val
);
2307 error ("Bad option value for %s", name
);
2308 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2309 &optval
, sizeof (optval
));
2313 #ifdef SO_BINDTODEVICE
2316 char devname
[IFNAMSIZ
+1];
2318 /* This is broken, at least in the Linux 2.4 kernel.
2319 To unbind, the arg must be a zero integer, not the empty string.
2320 This should work on all systems. KFS. 2003-09-23. */
2321 memset (devname
, 0, sizeof devname
);
2324 char *arg
= SSDATA (val
);
2325 int len
= min (strlen (arg
), IFNAMSIZ
);
2326 memcpy (devname
, arg
, len
);
2328 else if (!NILP (val
))
2329 error ("Bad option value for %s", name
);
2330 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2339 struct linger linger
;
2342 linger
.l_linger
= 0;
2343 if (TYPE_RANGED_INTEGERP (int, val
))
2344 linger
.l_linger
= XINT (val
);
2346 linger
.l_onoff
= NILP (val
) ? 0 : 1;
2347 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2348 &linger
, sizeof (linger
));
2358 report_file_error ("Cannot set network option",
2359 Fcons (opt
, Fcons (val
, Qnil
)));
2360 return (1 << sopt
->optbit
);
2364 DEFUN ("set-network-process-option",
2365 Fset_network_process_option
, Sset_network_process_option
,
2367 doc
: /* For network process PROCESS set option OPTION to value VALUE.
2368 See `make-network-process' for a list of options and values.
2369 If optional fourth arg NO-ERROR is non-nil, don't signal an error if
2370 OPTION is not a supported option, return nil instead; otherwise return t. */)
2371 (Lisp_Object process
, Lisp_Object option
, Lisp_Object value
, Lisp_Object no_error
)
2374 struct Lisp_Process
*p
;
2376 CHECK_PROCESS (process
);
2377 p
= XPROCESS (process
);
2378 if (!NETCONN1_P (p
))
2379 error ("Process is not a network process");
2383 error ("Process is not running");
2385 if (set_socket_option (s
, option
, value
))
2387 p
->childp
= Fplist_put (p
->childp
, option
, value
);
2391 if (NILP (no_error
))
2392 error ("Unknown or unsupported option");
2398 DEFUN ("serial-process-configure",
2399 Fserial_process_configure
,
2400 Sserial_process_configure
,
2402 doc
: /* Configure speed, bytesize, etc. of a serial process.
2404 Arguments are specified as keyword/argument pairs. Attributes that
2405 are not given are re-initialized from the process's current
2406 configuration (available via the function `process-contact') or set to
2407 reasonable default values. The following arguments are defined:
2413 -- Any of these arguments can be given to identify the process that is
2414 to be configured. If none of these arguments is given, the current
2415 buffer's process is used.
2417 :speed SPEED -- SPEED is the speed of the serial port in bits per
2418 second, also called baud rate. Any value can be given for SPEED, but
2419 most serial ports work only at a few defined values between 1200 and
2420 115200, with 9600 being the most common value. If SPEED is nil, the
2421 serial port is not configured any further, i.e., all other arguments
2422 are ignored. This may be useful for special serial ports such as
2423 Bluetooth-to-serial converters which can only be configured through AT
2424 commands. A value of nil for SPEED can be used only when passed
2425 through `make-serial-process' or `serial-term'.
2427 :bytesize BYTESIZE -- BYTESIZE is the number of bits per byte, which
2428 can be 7 or 8. If BYTESIZE is not given or nil, a value of 8 is used.
2430 :parity PARITY -- PARITY can be nil (don't use parity), the symbol
2431 `odd' (use odd parity), or the symbol `even' (use even parity). If
2432 PARITY is not given, no parity is used.
2434 :stopbits STOPBITS -- STOPBITS is the number of stopbits used to
2435 terminate a byte transmission. STOPBITS can be 1 or 2. If STOPBITS
2436 is not given or nil, 1 stopbit is used.
2438 :flowcontrol FLOWCONTROL -- FLOWCONTROL determines the type of
2439 flowcontrol to be used, which is either nil (don't use flowcontrol),
2440 the symbol `hw' (use RTS/CTS hardware flowcontrol), or the symbol `sw'
2441 \(use XON/XOFF software flowcontrol). If FLOWCONTROL is not given, no
2442 flowcontrol is used.
2444 `serial-process-configure' is called by `make-serial-process' for the
2445 initial configuration of the serial port.
2449 \(serial-process-configure :process "/dev/ttyS0" :speed 1200)
2451 \(serial-process-configure
2452 :buffer "COM1" :stopbits 1 :parity 'odd :flowcontrol 'hw)
2454 \(serial-process-configure :port "\\\\.\\COM13" :bytesize 7)
2456 usage: (serial-process-configure &rest ARGS) */)
2457 (ptrdiff_t nargs
, Lisp_Object
*args
)
2459 struct Lisp_Process
*p
;
2460 Lisp_Object contact
= Qnil
;
2461 Lisp_Object proc
= Qnil
;
2462 struct gcpro gcpro1
;
2464 contact
= Flist (nargs
, args
);
2467 proc
= Fplist_get (contact
, QCprocess
);
2469 proc
= Fplist_get (contact
, QCname
);
2471 proc
= Fplist_get (contact
, QCbuffer
);
2473 proc
= Fplist_get (contact
, QCport
);
2474 proc
= get_process (proc
);
2475 p
= XPROCESS (proc
);
2476 if (!EQ (p
->type
, Qserial
))
2477 error ("Not a serial process");
2479 if (NILP (Fplist_get (p
->childp
, QCspeed
)))
2485 serial_configure (p
, contact
);
2491 /* Used by make-serial-process to recover from errors. */
2493 make_serial_process_unwind (Lisp_Object proc
)
2495 if (!PROCESSP (proc
))
2497 remove_process (proc
);
2501 DEFUN ("make-serial-process", Fmake_serial_process
, Smake_serial_process
,
2503 doc
: /* Create and return a serial port process.
2505 In Emacs, serial port connections are represented by process objects,
2506 so input and output work as for subprocesses, and `delete-process'
2507 closes a serial port connection. However, a serial process has no
2508 process id, it cannot be signaled, and the status codes are different
2509 from normal processes.
2511 `make-serial-process' creates a process and a buffer, on which you
2512 probably want to use `process-send-string'. Try \\[serial-term] for
2513 an interactive terminal. See below for examples.
2515 Arguments are specified as keyword/argument pairs. The following
2516 arguments are defined:
2518 :port PORT -- (mandatory) PORT is the path or name of the serial port.
2519 For example, this could be "/dev/ttyS0" on Unix. On Windows, this
2520 could be "COM1", or "\\\\.\\COM10" for ports higher than COM9 (double
2521 the backslashes in strings).
2523 :speed SPEED -- (mandatory) is handled by `serial-process-configure',
2524 which is called by `make-serial-process'.
2526 :name NAME -- NAME is the name of the process. If NAME is not given,
2527 the value of PORT is used.
2529 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
2530 with the process. Process output goes at the end of that buffer,
2531 unless you specify an output stream or filter function to handle the
2532 output. If BUFFER is not given, the value of NAME is used.
2534 :coding CODING -- If CODING is a symbol, it specifies the coding
2535 system used for both reading and writing for this process. If CODING
2536 is a cons (DECODING . ENCODING), DECODING is used for reading, and
2537 ENCODING is used for writing.
2539 :noquery BOOL -- When exiting Emacs, query the user if BOOL is nil and
2540 the process is running. If BOOL is not given, query before exiting.
2542 :stop BOOL -- Start process in the `stopped' state if BOOL is non-nil.
2543 In the stopped state, a serial process does not accept incoming data,
2544 but you can send outgoing data. The stopped state is cleared by
2545 `continue-process' and set by `stop-process'.
2547 :filter FILTER -- Install FILTER as the process filter.
2549 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
2551 :plist PLIST -- Install PLIST as the initial plist of the process.
2558 -- These arguments are handled by `serial-process-configure', which is
2559 called by `make-serial-process'.
2561 The original argument list, possibly modified by later configuration,
2562 is available via the function `process-contact'.
2566 \(make-serial-process :port "/dev/ttyS0" :speed 9600)
2568 \(make-serial-process :port "COM1" :speed 115200 :stopbits 2)
2570 \(make-serial-process :port "\\\\.\\COM13" :speed 1200 :bytesize 7 :parity 'odd)
2572 \(make-serial-process :port "/dev/tty.BlueConsole-SPP-1" :speed nil)
2574 usage: (make-serial-process &rest ARGS) */)
2575 (ptrdiff_t nargs
, Lisp_Object
*args
)
2578 Lisp_Object proc
, contact
, port
;
2579 struct Lisp_Process
*p
;
2580 struct gcpro gcpro1
;
2581 Lisp_Object name
, buffer
;
2582 Lisp_Object tem
, val
;
2583 ptrdiff_t specpdl_count
= -1;
2588 contact
= Flist (nargs
, args
);
2591 port
= Fplist_get (contact
, QCport
);
2593 error ("No port specified");
2594 CHECK_STRING (port
);
2596 if (NILP (Fplist_member (contact
, QCspeed
)))
2597 error (":speed not specified");
2598 if (!NILP (Fplist_get (contact
, QCspeed
)))
2599 CHECK_NUMBER (Fplist_get (contact
, QCspeed
));
2601 name
= Fplist_get (contact
, QCname
);
2604 CHECK_STRING (name
);
2605 proc
= make_process (name
);
2606 specpdl_count
= SPECPDL_INDEX ();
2607 record_unwind_protect (make_serial_process_unwind
, proc
);
2608 p
= XPROCESS (proc
);
2610 fd
= serial_open (SSDATA (port
));
2613 if (fd
> max_process_desc
)
2614 max_process_desc
= fd
;
2615 chan_process
[fd
] = proc
;
2617 buffer
= Fplist_get (contact
, QCbuffer
);
2620 buffer
= Fget_buffer_create (buffer
);
2623 p
->childp
= contact
;
2624 p
->plist
= Fcopy_sequence (Fplist_get (contact
, QCplist
));
2626 p
->sentinel
= Fplist_get (contact
, QCsentinel
);
2627 p
->filter
= Fplist_get (contact
, QCfilter
);
2629 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
2630 p
->kill_without_query
= 1;
2631 if (tem
= Fplist_get (contact
, QCstop
), !NILP (tem
))
2635 if (!EQ (p
->command
, Qt
))
2637 FD_SET (fd
, &input_wait_mask
);
2638 FD_SET (fd
, &non_keyboard_wait_mask
);
2641 if (BUFFERP (buffer
))
2643 set_marker_both (p
->mark
, buffer
,
2644 BUF_ZV (XBUFFER (buffer
)),
2645 BUF_ZV_BYTE (XBUFFER (buffer
)));
2648 tem
= Fplist_member (contact
, QCcoding
);
2649 if (!NILP (tem
) && (!CONSP (tem
) || !CONSP (XCDR (tem
))))
2655 val
= XCAR (XCDR (tem
));
2659 else if (!NILP (Vcoding_system_for_read
))
2660 val
= Vcoding_system_for_read
;
2661 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
2662 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
2664 p
->decode_coding_system
= val
;
2669 val
= XCAR (XCDR (tem
));
2673 else if (!NILP (Vcoding_system_for_write
))
2674 val
= Vcoding_system_for_write
;
2675 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
2676 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
2678 p
->encode_coding_system
= val
;
2680 setup_process_coding_systems (proc
);
2681 p
->decoding_buf
= empty_unibyte_string
;
2682 p
->decoding_carryover
= 0;
2683 p
->encoding_buf
= empty_unibyte_string
;
2684 p
->inherit_coding_system_flag
2685 = !(!NILP (tem
) || NILP (buffer
) || !inherit_process_coding_system
);
2687 Fserial_process_configure (nargs
, args
);
2689 specpdl_ptr
= specpdl
+ specpdl_count
;
2695 /* Create a network stream/datagram client/server process. Treated
2696 exactly like a normal process when reading and writing. Primary
2697 differences are in status display and process deletion. A network
2698 connection has no PID; you cannot signal it. All you can do is
2699 stop/continue it and deactivate/close it via delete-process */
2701 DEFUN ("make-network-process", Fmake_network_process
, Smake_network_process
,
2703 doc
: /* Create and return a network server or client process.
2705 In Emacs, network connections are represented by process objects, so
2706 input and output work as for subprocesses and `delete-process' closes
2707 a network connection. However, a network process has no process id,
2708 it cannot be signaled, and the status codes are different from normal
2711 Arguments are specified as keyword/argument pairs. The following
2712 arguments are defined:
2714 :name NAME -- NAME is name for process. It is modified if necessary
2717 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
2718 with the process. Process output goes at end of that buffer, unless
2719 you specify an output stream or filter function to handle the output.
2720 BUFFER may be also nil, meaning that this process is not associated
2723 :host HOST -- HOST is name of the host to connect to, or its IP
2724 address. The symbol `local' specifies the local host. If specified
2725 for a server process, it must be a valid name or address for the local
2726 host, and only clients connecting to that address will be accepted.
2728 :service SERVICE -- SERVICE is name of the service desired, or an
2729 integer specifying a port number to connect to. If SERVICE is t,
2730 a random port number is selected for the server. (If Emacs was
2731 compiled with getaddrinfo, a port number can also be specified as a
2732 string, e.g. "80", as well as an integer. This is not portable.)
2734 :type TYPE -- TYPE is the type of connection. The default (nil) is a
2735 stream type connection, `datagram' creates a datagram type connection,
2736 `seqpacket' creates a reliable datagram connection.
2738 :family FAMILY -- FAMILY is the address (and protocol) family for the
2739 service specified by HOST and SERVICE. The default (nil) is to use
2740 whatever address family (IPv4 or IPv6) that is defined for the host
2741 and port number specified by HOST and SERVICE. Other address families
2743 local -- for a local (i.e. UNIX) address specified by SERVICE.
2744 ipv4 -- use IPv4 address family only.
2745 ipv6 -- use IPv6 address family only.
2747 :local ADDRESS -- ADDRESS is the local address used for the connection.
2748 This parameter is ignored when opening a client process. When specified
2749 for a server process, the FAMILY, HOST and SERVICE args are ignored.
2751 :remote ADDRESS -- ADDRESS is the remote partner's address for the
2752 connection. This parameter is ignored when opening a stream server
2753 process. For a datagram server process, it specifies the initial
2754 setting of the remote datagram address. When specified for a client
2755 process, the FAMILY, HOST, and SERVICE args are ignored.
2757 The format of ADDRESS depends on the address family:
2758 - An IPv4 address is represented as an vector of integers [A B C D P]
2759 corresponding to numeric IP address A.B.C.D and port number P.
2760 - A local address is represented as a string with the address in the
2761 local address space.
2762 - An "unsupported family" address is represented by a cons (F . AV)
2763 where F is the family number and AV is a vector containing the socket
2764 address data with one element per address data byte. Do not rely on
2765 this format in portable code, as it may depend on implementation
2766 defined constants, data sizes, and data structure alignment.
2768 :coding CODING -- If CODING is a symbol, it specifies the coding
2769 system used for both reading and writing for this process. If CODING
2770 is a cons (DECODING . ENCODING), DECODING is used for reading, and
2771 ENCODING is used for writing.
2773 :nowait BOOL -- If BOOL is non-nil for a stream type client process,
2774 return without waiting for the connection to complete; instead, the
2775 sentinel function will be called with second arg matching "open" (if
2776 successful) or "failed" when the connect completes. Default is to use
2777 a blocking connect (i.e. wait) for stream type connections.
2779 :noquery BOOL -- Query the user unless BOOL is non-nil, and process is
2780 running when Emacs is exited.
2782 :stop BOOL -- Start process in the `stopped' state if BOOL non-nil.
2783 In the stopped state, a server process does not accept new
2784 connections, and a client process does not handle incoming traffic.
2785 The stopped state is cleared by `continue-process' and set by
2788 :filter FILTER -- Install FILTER as the process filter.
2790 :filter-multibyte BOOL -- If BOOL is non-nil, strings given to the
2791 process filter are multibyte, otherwise they are unibyte.
2792 If this keyword is not specified, the strings are multibyte if
2793 `default-enable-multibyte-characters' is non-nil.
2795 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
2797 :log LOG -- Install LOG as the server process log function. This
2798 function is called when the server accepts a network connection from a
2799 client. The arguments are SERVER, CLIENT, and MESSAGE, where SERVER
2800 is the server process, CLIENT is the new process for the connection,
2801 and MESSAGE is a string.
2803 :plist PLIST -- Install PLIST as the new process' initial plist.
2805 :server QLEN -- if QLEN is non-nil, create a server process for the
2806 specified FAMILY, SERVICE, and connection type (stream or datagram).
2807 If QLEN is an integer, it is used as the max. length of the server's
2808 pending connection queue (also known as the backlog); the default
2809 queue length is 5. Default is to create a client process.
2811 The following network options can be specified for this connection:
2813 :broadcast BOOL -- Allow send and receive of datagram broadcasts.
2814 :dontroute BOOL -- Only send to directly connected hosts.
2815 :keepalive BOOL -- Send keep-alive messages on network stream.
2816 :linger BOOL or TIMEOUT -- Send queued messages before closing.
2817 :oobinline BOOL -- Place out-of-band data in receive data stream.
2818 :priority INT -- Set protocol defined priority for sent packets.
2819 :reuseaddr BOOL -- Allow reusing a recently used local address
2820 (this is allowed by default for a server process).
2821 :bindtodevice NAME -- bind to interface NAME. Using this may require
2822 special privileges on some systems.
2824 Consult the relevant system programmer's manual pages for more
2825 information on using these options.
2828 A server process will listen for and accept connections from clients.
2829 When a client connection is accepted, a new network process is created
2830 for the connection with the following parameters:
2832 - The client's process name is constructed by concatenating the server
2833 process' NAME and a client identification string.
2834 - If the FILTER argument is non-nil, the client process will not get a
2835 separate process buffer; otherwise, the client's process buffer is a newly
2836 created buffer named after the server process' BUFFER name or process
2837 NAME concatenated with the client identification string.
2838 - The connection type and the process filter and sentinel parameters are
2839 inherited from the server process' TYPE, FILTER and SENTINEL.
2840 - The client process' contact info is set according to the client's
2841 addressing information (typically an IP address and a port number).
2842 - The client process' plist is initialized from the server's plist.
2844 Notice that the FILTER and SENTINEL args are never used directly by
2845 the server process. Also, the BUFFER argument is not used directly by
2846 the server process, but via the optional :log function, accepted (and
2847 failed) connections may be logged in the server process' buffer.
2849 The original argument list, modified with the actual connection
2850 information, is available via the `process-contact' function.
2852 usage: (make-network-process &rest ARGS) */)
2853 (ptrdiff_t nargs
, Lisp_Object
*args
)
2856 Lisp_Object contact
;
2857 struct Lisp_Process
*p
;
2858 #ifdef HAVE_GETADDRINFO
2859 struct addrinfo ai
, *res
, *lres
;
2860 struct addrinfo hints
;
2861 const char *portstring
;
2863 #else /* HAVE_GETADDRINFO */
2864 struct _emacs_addrinfo
2870 struct sockaddr
*ai_addr
;
2871 struct _emacs_addrinfo
*ai_next
;
2873 #endif /* HAVE_GETADDRINFO */
2874 struct sockaddr_in address_in
;
2875 #ifdef HAVE_LOCAL_SOCKETS
2876 struct sockaddr_un address_un
;
2881 int s
= -1, outch
, inch
;
2882 struct gcpro gcpro1
;
2883 ptrdiff_t count
= SPECPDL_INDEX ();
2885 Lisp_Object QCaddress
; /* one of QClocal or QCremote */
2887 Lisp_Object name
, buffer
, host
, service
, address
;
2888 Lisp_Object filter
, sentinel
;
2889 int is_non_blocking_client
= 0;
2890 int is_server
= 0, backlog
= 5;
2897 /* Save arguments for process-contact and clone-process. */
2898 contact
= Flist (nargs
, args
);
2902 /* Ensure socket support is loaded if available. */
2903 init_winsock (TRUE
);
2906 /* :type TYPE (nil: stream, datagram */
2907 tem
= Fplist_get (contact
, QCtype
);
2909 socktype
= SOCK_STREAM
;
2910 #ifdef DATAGRAM_SOCKETS
2911 else if (EQ (tem
, Qdatagram
))
2912 socktype
= SOCK_DGRAM
;
2914 #ifdef HAVE_SEQPACKET
2915 else if (EQ (tem
, Qseqpacket
))
2916 socktype
= SOCK_SEQPACKET
;
2919 error ("Unsupported connection type");
2922 tem
= Fplist_get (contact
, QCserver
);
2925 /* Don't support network sockets when non-blocking mode is
2926 not available, since a blocked Emacs is not useful. */
2927 #if !defined (O_NONBLOCK) && !defined (O_NDELAY)
2928 error ("Network servers not supported");
2931 if (TYPE_RANGED_INTEGERP (int, tem
))
2932 backlog
= XINT (tem
);
2936 /* Make QCaddress an alias for :local (server) or :remote (client). */
2937 QCaddress
= is_server
? QClocal
: QCremote
;
2940 if (!is_server
&& socktype
!= SOCK_DGRAM
2941 && (tem
= Fplist_get (contact
, QCnowait
), !NILP (tem
)))
2943 #ifndef NON_BLOCKING_CONNECT
2944 error ("Non-blocking connect not supported");
2946 is_non_blocking_client
= 1;
2950 name
= Fplist_get (contact
, QCname
);
2951 buffer
= Fplist_get (contact
, QCbuffer
);
2952 filter
= Fplist_get (contact
, QCfilter
);
2953 sentinel
= Fplist_get (contact
, QCsentinel
);
2955 CHECK_STRING (name
);
2957 /* Initialize addrinfo structure in case we don't use getaddrinfo. */
2958 ai
.ai_socktype
= socktype
;
2963 /* :local ADDRESS or :remote ADDRESS */
2964 address
= Fplist_get (contact
, QCaddress
);
2965 if (!NILP (address
))
2967 host
= service
= Qnil
;
2969 if (!(ai
.ai_addrlen
= get_lisp_to_sockaddr_size (address
, &family
)))
2970 error ("Malformed :address");
2971 ai
.ai_family
= family
;
2972 ai
.ai_addr
= alloca (ai
.ai_addrlen
);
2973 conv_lisp_to_sockaddr (family
, address
, ai
.ai_addr
, ai
.ai_addrlen
);
2977 /* :family FAMILY -- nil (for Inet), local, or integer. */
2978 tem
= Fplist_get (contact
, QCfamily
);
2981 #if defined (HAVE_GETADDRINFO) && defined (AF_INET6)
2987 #ifdef HAVE_LOCAL_SOCKETS
2988 else if (EQ (tem
, Qlocal
))
2992 else if (EQ (tem
, Qipv6
))
2995 else if (EQ (tem
, Qipv4
))
2997 else if (TYPE_RANGED_INTEGERP (int, tem
))
2998 family
= XINT (tem
);
3000 error ("Unknown address family");
3002 ai
.ai_family
= family
;
3004 /* :service SERVICE -- string, integer (port number), or t (random port). */
3005 service
= Fplist_get (contact
, QCservice
);
3007 /* :host HOST -- hostname, ip address, or 'local for localhost. */
3008 host
= Fplist_get (contact
, QChost
);
3011 if (EQ (host
, Qlocal
))
3012 /* Depending on setup, "localhost" may map to different IPv4 and/or
3013 IPv6 addresses, so it's better to be explicit. (Bug#6781) */
3014 host
= build_string ("127.0.0.1");
3015 CHECK_STRING (host
);
3018 #ifdef HAVE_LOCAL_SOCKETS
3019 if (family
== AF_LOCAL
)
3023 message (":family local ignores the :host \"%s\" property",
3025 contact
= Fplist_put (contact
, QChost
, Qnil
);
3028 CHECK_STRING (service
);
3029 memset (&address_un
, 0, sizeof address_un
);
3030 address_un
.sun_family
= AF_LOCAL
;
3031 strncpy (address_un
.sun_path
, SSDATA (service
), sizeof address_un
.sun_path
);
3032 ai
.ai_addr
= (struct sockaddr
*) &address_un
;
3033 ai
.ai_addrlen
= sizeof address_un
;
3038 /* Slow down polling to every ten seconds.
3039 Some kernels have a bug which causes retrying connect to fail
3040 after a connect. Polling can interfere with gethostbyname too. */
3041 #ifdef POLL_FOR_INPUT
3042 if (socktype
!= SOCK_DGRAM
)
3044 record_unwind_protect (unwind_stop_other_atimers
, Qnil
);
3045 bind_polling_period (10);
3049 #ifdef HAVE_GETADDRINFO
3050 /* If we have a host, use getaddrinfo to resolve both host and service.
3051 Otherwise, use getservbyname to lookup the service. */
3055 /* SERVICE can either be a string or int.
3056 Convert to a C string for later use by getaddrinfo. */
3057 if (EQ (service
, Qt
))
3059 else if (INTEGERP (service
))
3061 sprintf (portbuf
, "%"pI
"d", XINT (service
));
3062 portstring
= portbuf
;
3066 CHECK_STRING (service
);
3067 portstring
= SSDATA (service
);
3072 memset (&hints
, 0, sizeof (hints
));
3074 hints
.ai_family
= family
;
3075 hints
.ai_socktype
= socktype
;
3076 hints
.ai_protocol
= 0;
3078 #ifdef HAVE_RES_INIT
3082 ret
= getaddrinfo (SSDATA (host
), portstring
, &hints
, &res
);
3084 #ifdef HAVE_GAI_STRERROR
3085 error ("%s/%s %s", SSDATA (host
), portstring
, gai_strerror (ret
));
3087 error ("%s/%s getaddrinfo error %d", SSDATA (host
), portstring
, ret
);
3093 #endif /* HAVE_GETADDRINFO */
3095 /* We end up here if getaddrinfo is not defined, or in case no hostname
3096 has been specified (e.g. for a local server process). */
3098 if (EQ (service
, Qt
))
3100 else if (INTEGERP (service
))
3101 port
= htons ((unsigned short) XINT (service
));
3104 struct servent
*svc_info
;
3105 CHECK_STRING (service
);
3106 svc_info
= getservbyname (SSDATA (service
),
3107 (socktype
== SOCK_DGRAM
? "udp" : "tcp"));
3109 error ("Unknown service: %s", SDATA (service
));
3110 port
= svc_info
->s_port
;
3113 memset (&address_in
, 0, sizeof address_in
);
3114 address_in
.sin_family
= family
;
3115 address_in
.sin_addr
.s_addr
= INADDR_ANY
;
3116 address_in
.sin_port
= port
;
3118 #ifndef HAVE_GETADDRINFO
3121 struct hostent
*host_info_ptr
;
3123 /* gethostbyname may fail with TRY_AGAIN, but we don't honor that,
3124 as it may `hang' Emacs for a very long time. */
3128 #ifdef HAVE_RES_INIT
3132 host_info_ptr
= gethostbyname (SDATA (host
));
3137 memcpy (&address_in
.sin_addr
, host_info_ptr
->h_addr
,
3138 host_info_ptr
->h_length
);
3139 family
= host_info_ptr
->h_addrtype
;
3140 address_in
.sin_family
= family
;
3143 /* Attempt to interpret host as numeric inet address */
3145 unsigned long numeric_addr
;
3146 numeric_addr
= inet_addr (SSDATA (host
));
3147 if (numeric_addr
== -1)
3148 error ("Unknown host \"%s\"", SDATA (host
));
3150 memcpy (&address_in
.sin_addr
, &numeric_addr
,
3151 sizeof (address_in
.sin_addr
));
3155 #endif /* not HAVE_GETADDRINFO */
3157 ai
.ai_family
= family
;
3158 ai
.ai_addr
= (struct sockaddr
*) &address_in
;
3159 ai
.ai_addrlen
= sizeof address_in
;
3163 /* Do this in case we never enter the for-loop below. */
3164 count1
= SPECPDL_INDEX ();
3167 for (lres
= res
; lres
; lres
= lres
->ai_next
)
3176 s
= socket (lres
->ai_family
, lres
->ai_socktype
, lres
->ai_protocol
);
3183 #ifdef DATAGRAM_SOCKETS
3184 if (!is_server
&& socktype
== SOCK_DGRAM
)
3186 #endif /* DATAGRAM_SOCKETS */
3188 #ifdef NON_BLOCKING_CONNECT
3189 if (is_non_blocking_client
)
3192 ret
= fcntl (s
, F_SETFL
, O_NONBLOCK
);
3194 ret
= fcntl (s
, F_SETFL
, O_NDELAY
);
3206 /* Make us close S if quit. */
3207 record_unwind_protect (close_file_unwind
, make_number (s
));
3209 /* Parse network options in the arg list.
3210 We simply ignore anything which isn't a known option (including other keywords).
3211 An error is signaled if setting a known option fails. */
3212 for (optn
= optbits
= 0; optn
< nargs
-1; optn
+= 2)
3213 optbits
|= set_socket_option (s
, args
[optn
], args
[optn
+1]);
3217 /* Configure as a server socket. */
3219 /* SO_REUSEADDR = 1 is default for server sockets; must specify
3220 explicit :reuseaddr key to override this. */
3221 #ifdef HAVE_LOCAL_SOCKETS
3222 if (family
!= AF_LOCAL
)
3224 if (!(optbits
& (1 << OPIX_REUSEADDR
)))
3227 if (setsockopt (s
, SOL_SOCKET
, SO_REUSEADDR
, &optval
, sizeof optval
))
3228 report_file_error ("Cannot set reuse option on server socket", Qnil
);
3231 if (bind (s
, lres
->ai_addr
, lres
->ai_addrlen
))
3232 report_file_error ("Cannot bind server socket", Qnil
);
3234 #ifdef HAVE_GETSOCKNAME
3235 if (EQ (service
, Qt
))
3237 struct sockaddr_in sa1
;
3238 socklen_t len1
= sizeof (sa1
);
3239 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3241 ((struct sockaddr_in
*)(lres
->ai_addr
))->sin_port
= sa1
.sin_port
;
3242 service
= make_number (ntohs (sa1
.sin_port
));
3243 contact
= Fplist_put (contact
, QCservice
, service
);
3248 if (socktype
!= SOCK_DGRAM
&& listen (s
, backlog
))
3249 report_file_error ("Cannot listen on server socket", Qnil
);
3257 ret
= connect (s
, lres
->ai_addr
, lres
->ai_addrlen
);
3260 if (ret
== 0 || xerrno
== EISCONN
)
3262 /* The unwind-protect will be discarded afterwards.
3263 Likewise for immediate_quit. */
3267 #ifdef NON_BLOCKING_CONNECT
3269 if (is_non_blocking_client
&& xerrno
== EINPROGRESS
)
3273 if (is_non_blocking_client
&& xerrno
== EWOULDBLOCK
)
3280 if (xerrno
== EINTR
)
3282 /* Unlike most other syscalls connect() cannot be called
3283 again. (That would return EALREADY.) The proper way to
3284 wait for completion is select(). */
3292 sc
= select (s
+ 1, (SELECT_TYPE
*)0, &fdset
, (SELECT_TYPE
*)0,
3299 report_file_error ("select failed", Qnil
);
3303 len
= sizeof xerrno
;
3304 eassert (FD_ISSET (s
, &fdset
));
3305 if (getsockopt (s
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &len
) == -1)
3306 report_file_error ("getsockopt failed", Qnil
);
3308 errno
= xerrno
, report_file_error ("error during connect", Qnil
);
3312 #endif /* !WINDOWSNT */
3316 /* Discard the unwind protect closing S. */
3317 specpdl_ptr
= specpdl
+ count1
;
3322 if (xerrno
== EINTR
)
3329 #ifdef DATAGRAM_SOCKETS
3330 if (socktype
== SOCK_DGRAM
)
3332 if (datagram_address
[s
].sa
)
3334 datagram_address
[s
].sa
= (struct sockaddr
*) xmalloc (lres
->ai_addrlen
);
3335 datagram_address
[s
].len
= lres
->ai_addrlen
;
3339 memset (datagram_address
[s
].sa
, 0, lres
->ai_addrlen
);
3340 if (remote
= Fplist_get (contact
, QCremote
), !NILP (remote
))
3343 rlen
= get_lisp_to_sockaddr_size (remote
, &rfamily
);
3344 if (rfamily
== lres
->ai_family
&& rlen
== lres
->ai_addrlen
)
3345 conv_lisp_to_sockaddr (rfamily
, remote
,
3346 datagram_address
[s
].sa
, rlen
);
3350 memcpy (datagram_address
[s
].sa
, lres
->ai_addr
, lres
->ai_addrlen
);
3353 contact
= Fplist_put (contact
, QCaddress
,
3354 conv_sockaddr_to_lisp (lres
->ai_addr
, lres
->ai_addrlen
));
3355 #ifdef HAVE_GETSOCKNAME
3358 struct sockaddr_in sa1
;
3359 socklen_t len1
= sizeof (sa1
);
3360 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3361 contact
= Fplist_put (contact
, QClocal
,
3362 conv_sockaddr_to_lisp ((struct sockaddr
*)&sa1
, len1
));
3369 #ifdef HAVE_GETADDRINFO
3378 /* Discard the unwind protect for closing S, if any. */
3379 specpdl_ptr
= specpdl
+ count1
;
3381 /* Unwind bind_polling_period and request_sigio. */
3382 unbind_to (count
, Qnil
);
3386 /* If non-blocking got this far - and failed - assume non-blocking is
3387 not supported after all. This is probably a wrong assumption, but
3388 the normal blocking calls to open-network-stream handles this error
3390 if (is_non_blocking_client
)
3395 report_file_error ("make server process failed", contact
);
3397 report_file_error ("make client process failed", contact
);
3404 buffer
= Fget_buffer_create (buffer
);
3405 proc
= make_process (name
);
3407 chan_process
[inch
] = proc
;
3410 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
3413 fcntl (inch
, F_SETFL
, O_NDELAY
);
3417 p
= XPROCESS (proc
);
3419 p
->childp
= contact
;
3420 p
->plist
= Fcopy_sequence (Fplist_get (contact
, QCplist
));
3424 p
->sentinel
= sentinel
;
3426 p
->log
= Fplist_get (contact
, QClog
);
3427 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
3428 p
->kill_without_query
= 1;
3429 if ((tem
= Fplist_get (contact
, QCstop
), !NILP (tem
)))
3434 if (is_server
&& socktype
!= SOCK_DGRAM
)
3435 p
->status
= Qlisten
;
3437 /* Make the process marker point into the process buffer (if any). */
3438 if (BUFFERP (buffer
))
3439 set_marker_both (p
->mark
, buffer
,
3440 BUF_ZV (XBUFFER (buffer
)),
3441 BUF_ZV_BYTE (XBUFFER (buffer
)));
3443 #ifdef NON_BLOCKING_CONNECT
3444 if (is_non_blocking_client
)
3446 /* We may get here if connect did succeed immediately. However,
3447 in that case, we still need to signal this like a non-blocking
3449 p
->status
= Qconnect
;
3450 if (!FD_ISSET (inch
, &connect_wait_mask
))
3452 FD_SET (inch
, &connect_wait_mask
);
3453 FD_SET (inch
, &write_mask
);
3454 num_pending_connects
++;
3459 /* A server may have a client filter setting of Qt, but it must
3460 still listen for incoming connects unless it is stopped. */
3461 if ((!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
3462 || (EQ (p
->status
, Qlisten
) && NILP (p
->command
)))
3464 FD_SET (inch
, &input_wait_mask
);
3465 FD_SET (inch
, &non_keyboard_wait_mask
);
3468 if (inch
> max_process_desc
)
3469 max_process_desc
= inch
;
3471 tem
= Fplist_member (contact
, QCcoding
);
3472 if (!NILP (tem
) && (!CONSP (tem
) || !CONSP (XCDR (tem
))))
3473 tem
= Qnil
; /* No error message (too late!). */
3476 /* Setup coding systems for communicating with the network stream. */
3477 struct gcpro gcpro1
;
3478 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
3479 Lisp_Object coding_systems
= Qt
;
3480 Lisp_Object fargs
[5], val
;
3484 val
= XCAR (XCDR (tem
));
3488 else if (!NILP (Vcoding_system_for_read
))
3489 val
= Vcoding_system_for_read
;
3490 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
3491 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
3492 /* We dare not decode end-of-line format by setting VAL to
3493 Qraw_text, because the existing Emacs Lisp libraries
3494 assume that they receive bare code including a sequence of
3499 if (NILP (host
) || NILP (service
))
3500 coding_systems
= Qnil
;
3503 fargs
[0] = Qopen_network_stream
, fargs
[1] = name
,
3504 fargs
[2] = buffer
, fargs
[3] = host
, fargs
[4] = service
;
3506 coding_systems
= Ffind_operation_coding_system (5, fargs
);
3509 if (CONSP (coding_systems
))
3510 val
= XCAR (coding_systems
);
3511 else if (CONSP (Vdefault_process_coding_system
))
3512 val
= XCAR (Vdefault_process_coding_system
);
3516 p
->decode_coding_system
= val
;
3520 val
= XCAR (XCDR (tem
));
3524 else if (!NILP (Vcoding_system_for_write
))
3525 val
= Vcoding_system_for_write
;
3526 else if (NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
3530 if (EQ (coding_systems
, Qt
))
3532 if (NILP (host
) || NILP (service
))
3533 coding_systems
= Qnil
;
3536 fargs
[0] = Qopen_network_stream
, fargs
[1] = name
,
3537 fargs
[2] = buffer
, fargs
[3] = host
, fargs
[4] = service
;
3539 coding_systems
= Ffind_operation_coding_system (5, fargs
);
3543 if (CONSP (coding_systems
))
3544 val
= XCDR (coding_systems
);
3545 else if (CONSP (Vdefault_process_coding_system
))
3546 val
= XCDR (Vdefault_process_coding_system
);
3550 p
->encode_coding_system
= val
;
3552 setup_process_coding_systems (proc
);
3554 p
->decoding_buf
= empty_unibyte_string
;
3555 p
->decoding_carryover
= 0;
3556 p
->encoding_buf
= empty_unibyte_string
;
3558 p
->inherit_coding_system_flag
3559 = !(!NILP (tem
) || NILP (buffer
) || !inherit_process_coding_system
);
3566 #if defined (HAVE_NET_IF_H)
3569 DEFUN ("network-interface-list", Fnetwork_interface_list
, Snetwork_interface_list
, 0, 0, 0,
3570 doc
: /* Return an alist of all network interfaces and their network address.
3571 Each element is a cons, the car of which is a string containing the
3572 interface name, and the cdr is the network address in internal
3573 format; see the description of ADDRESS in `make-network-process'. */)
3576 struct ifconf ifconf
;
3577 struct ifreq
*ifreq
;
3579 ptrdiff_t buf_size
= 512;
3583 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3589 buf
= xpalloc (buf
, &buf_size
, 1, INT_MAX
, 1);
3590 ifconf
.ifc_buf
= buf
;
3591 ifconf
.ifc_len
= buf_size
;
3592 if (ioctl (s
, SIOCGIFCONF
, &ifconf
))
3599 while (ifconf
.ifc_len
== buf_size
);
3604 ifreq
= ifconf
.ifc_req
;
3605 while ((char *) ifreq
< (char *) ifconf
.ifc_req
+ ifconf
.ifc_len
)
3607 struct ifreq
*ifq
= ifreq
;
3608 #ifdef HAVE_STRUCT_IFREQ_IFR_ADDR_SA_LEN
3609 #define SIZEOF_IFREQ(sif) \
3610 ((sif)->ifr_addr.sa_len < sizeof (struct sockaddr) \
3611 ? sizeof (*(sif)) : sizeof ((sif)->ifr_name) + (sif)->ifr_addr.sa_len)
3613 int len
= SIZEOF_IFREQ (ifq
);
3615 int len
= sizeof (*ifreq
);
3617 char namebuf
[sizeof (ifq
->ifr_name
) + 1];
3619 ifreq
= (struct ifreq
*) ((char *) ifreq
+ len
);
3621 if (ifq
->ifr_addr
.sa_family
!= AF_INET
)
3624 memcpy (namebuf
, ifq
->ifr_name
, sizeof (ifq
->ifr_name
));
3625 namebuf
[sizeof (ifq
->ifr_name
)] = 0;
3626 res
= Fcons (Fcons (build_string (namebuf
),
3627 conv_sockaddr_to_lisp (&ifq
->ifr_addr
,
3628 sizeof (struct sockaddr
))),
3635 #endif /* SIOCGIFCONF */
3637 #if defined (SIOCGIFADDR) || defined (SIOCGIFHWADDR) || defined (SIOCGIFFLAGS)
3641 const char *flag_sym
;
3644 static const struct ifflag_def ifflag_table
[] = {
3648 #ifdef IFF_BROADCAST
3649 { IFF_BROADCAST
, "broadcast" },
3652 { IFF_DEBUG
, "debug" },
3655 { IFF_LOOPBACK
, "loopback" },
3657 #ifdef IFF_POINTOPOINT
3658 { IFF_POINTOPOINT
, "pointopoint" },
3661 { IFF_RUNNING
, "running" },
3664 { IFF_NOARP
, "noarp" },
3667 { IFF_PROMISC
, "promisc" },
3669 #ifdef IFF_NOTRAILERS
3670 #ifdef NS_IMPL_COCOA
3671 /* Really means smart, notrailers is obsolete */
3672 { IFF_NOTRAILERS
, "smart" },
3674 { IFF_NOTRAILERS
, "notrailers" },
3678 { IFF_ALLMULTI
, "allmulti" },
3681 { IFF_MASTER
, "master" },
3684 { IFF_SLAVE
, "slave" },
3686 #ifdef IFF_MULTICAST
3687 { IFF_MULTICAST
, "multicast" },
3690 { IFF_PORTSEL
, "portsel" },
3692 #ifdef IFF_AUTOMEDIA
3693 { IFF_AUTOMEDIA
, "automedia" },
3696 { IFF_DYNAMIC
, "dynamic" },
3699 { IFF_OACTIVE
, "oactive" }, /* OpenBSD: transmission in progress */
3702 { IFF_SIMPLEX
, "simplex" }, /* OpenBSD: can't hear own transmissions */
3705 { IFF_LINK0
, "link0" }, /* OpenBSD: per link layer defined bit */
3708 { IFF_LINK1
, "link1" }, /* OpenBSD: per link layer defined bit */
3711 { IFF_LINK2
, "link2" }, /* OpenBSD: per link layer defined bit */
3716 DEFUN ("network-interface-info", Fnetwork_interface_info
, Snetwork_interface_info
, 1, 1, 0,
3717 doc
: /* Return information about network interface named IFNAME.
3718 The return value is a list (ADDR BCAST NETMASK HWADDR FLAGS),
3719 where ADDR is the layer 3 address, BCAST is the layer 3 broadcast address,
3720 NETMASK is the layer 3 network mask, HWADDR is the layer 2 address, and
3721 FLAGS is the current flags of the interface. */)
3722 (Lisp_Object ifname
)
3725 Lisp_Object res
= Qnil
;
3729 #if (! (defined SIOCGIFHWADDR && defined HAVE_STRUCT_IFREQ_IFR_HWADDR) \
3730 && defined HAVE_GETIFADDRS && defined LLADDR)
3731 struct ifaddrs
*ifap
;
3734 CHECK_STRING (ifname
);
3736 memset (rq
.ifr_name
, 0, sizeof rq
.ifr_name
);
3737 strncpy (rq
.ifr_name
, SSDATA (ifname
), sizeof (rq
.ifr_name
));
3739 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3744 #if defined (SIOCGIFFLAGS) && defined (HAVE_STRUCT_IFREQ_IFR_FLAGS)
3745 if (ioctl (s
, SIOCGIFFLAGS
, &rq
) == 0)
3747 int flags
= rq
.ifr_flags
;
3748 const struct ifflag_def
*fp
;
3751 /* If flags is smaller than int (i.e. short) it may have the high bit set
3752 due to IFF_MULTICAST. In that case, sign extending it into
3754 if (flags
< 0 && sizeof (rq
.ifr_flags
) < sizeof (flags
))
3755 flags
= (unsigned short) rq
.ifr_flags
;
3758 for (fp
= ifflag_table
; flags
!= 0 && fp
->flag_sym
; fp
++)
3760 if (flags
& fp
->flag_bit
)
3762 elt
= Fcons (intern (fp
->flag_sym
), elt
);
3763 flags
-= fp
->flag_bit
;
3766 for (fnum
= 0; flags
&& fnum
< 32; flags
>>= 1, fnum
++)
3770 elt
= Fcons (make_number (fnum
), elt
);
3775 res
= Fcons (elt
, res
);
3778 #if defined (SIOCGIFHWADDR) && defined (HAVE_STRUCT_IFREQ_IFR_HWADDR)
3779 if (ioctl (s
, SIOCGIFHWADDR
, &rq
) == 0)
3781 Lisp_Object hwaddr
= Fmake_vector (make_number (6), Qnil
);
3782 register struct Lisp_Vector
*p
= XVECTOR (hwaddr
);
3786 for (n
= 0; n
< 6; n
++)
3787 p
->contents
[n
] = make_number (((unsigned char *)&rq
.ifr_hwaddr
.sa_data
[0])[n
]);
3788 elt
= Fcons (make_number (rq
.ifr_hwaddr
.sa_family
), hwaddr
);
3790 #elif defined (HAVE_GETIFADDRS) && defined (LLADDR)
3791 if (getifaddrs (&ifap
) != -1)
3793 Lisp_Object hwaddr
= Fmake_vector (make_number (6), Qnil
);
3794 register struct Lisp_Vector
*p
= XVECTOR (hwaddr
);
3797 for (it
= ifap
; it
!= NULL
; it
= it
->ifa_next
)
3799 struct sockaddr_dl
*sdl
= (struct sockaddr_dl
*) it
->ifa_addr
;
3800 unsigned char linkaddr
[6];
3803 if (it
->ifa_addr
->sa_family
!= AF_LINK
3804 || strcmp (it
->ifa_name
, SSDATA (ifname
)) != 0
3805 || sdl
->sdl_alen
!= 6)
3808 memcpy (linkaddr
, LLADDR (sdl
), sdl
->sdl_alen
);
3809 for (n
= 0; n
< 6; n
++)
3810 p
->contents
[n
] = make_number (linkaddr
[n
]);
3812 elt
= Fcons (make_number (it
->ifa_addr
->sa_family
), hwaddr
);
3816 #ifdef HAVE_FREEIFADDRS
3820 #endif /* HAVE_GETIFADDRS && LLADDR */
3822 res
= Fcons (elt
, res
);
3825 #if defined (SIOCGIFNETMASK) && (defined (HAVE_STRUCT_IFREQ_IFR_NETMASK) || defined (HAVE_STRUCT_IFREQ_IFR_ADDR))
3826 if (ioctl (s
, SIOCGIFNETMASK
, &rq
) == 0)
3829 #ifdef HAVE_STRUCT_IFREQ_IFR_NETMASK
3830 elt
= conv_sockaddr_to_lisp (&rq
.ifr_netmask
, sizeof (rq
.ifr_netmask
));
3832 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
3836 res
= Fcons (elt
, res
);
3839 #if defined (SIOCGIFBRDADDR) && defined (HAVE_STRUCT_IFREQ_IFR_BROADADDR)
3840 if (ioctl (s
, SIOCGIFBRDADDR
, &rq
) == 0)
3843 elt
= conv_sockaddr_to_lisp (&rq
.ifr_broadaddr
, sizeof (rq
.ifr_broadaddr
));
3846 res
= Fcons (elt
, res
);
3849 #if defined (SIOCGIFADDR) && defined (HAVE_STRUCT_IFREQ_IFR_ADDR)
3850 if (ioctl (s
, SIOCGIFADDR
, &rq
) == 0)
3853 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
3856 res
= Fcons (elt
, res
);
3860 return any
? res
: Qnil
;
3863 #endif /* defined (HAVE_NET_IF_H) */
3865 /* Turn off input and output for process PROC. */
3868 deactivate_process (Lisp_Object proc
)
3870 register int inchannel
, outchannel
;
3871 register struct Lisp_Process
*p
= XPROCESS (proc
);
3874 /* Delete GnuTLS structures in PROC, if any. */
3875 emacs_gnutls_deinit (proc
);
3876 #endif /* HAVE_GNUTLS */
3878 inchannel
= p
->infd
;
3879 outchannel
= p
->outfd
;
3881 #ifdef ADAPTIVE_READ_BUFFERING
3882 if (p
->read_output_delay
> 0)
3884 if (--process_output_delay_count
< 0)
3885 process_output_delay_count
= 0;
3886 p
->read_output_delay
= 0;
3887 p
->read_output_skip
= 0;
3893 /* Beware SIGCHLD hereabouts. */
3894 flush_pending_output (inchannel
);
3895 emacs_close (inchannel
);
3896 if (outchannel
>= 0 && outchannel
!= inchannel
)
3897 emacs_close (outchannel
);
3901 #ifdef DATAGRAM_SOCKETS
3902 if (DATAGRAM_CHAN_P (inchannel
))
3904 xfree (datagram_address
[inchannel
].sa
);
3905 datagram_address
[inchannel
].sa
= 0;
3906 datagram_address
[inchannel
].len
= 0;
3909 chan_process
[inchannel
] = Qnil
;
3910 FD_CLR (inchannel
, &input_wait_mask
);
3911 FD_CLR (inchannel
, &non_keyboard_wait_mask
);
3912 #ifdef NON_BLOCKING_CONNECT
3913 if (FD_ISSET (inchannel
, &connect_wait_mask
))
3915 FD_CLR (inchannel
, &connect_wait_mask
);
3916 FD_CLR (inchannel
, &write_mask
);
3917 if (--num_pending_connects
< 0)
3921 if (inchannel
== max_process_desc
)
3924 /* We just closed the highest-numbered process input descriptor,
3925 so recompute the highest-numbered one now. */
3926 max_process_desc
= 0;
3927 for (i
= 0; i
< MAXDESC
; i
++)
3928 if (!NILP (chan_process
[i
]))
3929 max_process_desc
= i
;
3935 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
3937 doc
: /* Allow any pending output from subprocesses to be read by Emacs.
3938 It is read into the process' buffers or given to their filter functions.
3939 Non-nil arg PROCESS means do not return until some output has been received
3942 Non-nil second arg SECONDS and third arg MILLISEC are number of seconds
3943 and milliseconds to wait; return after that much time whether or not
3944 there is any subprocess output. If SECONDS is a floating point number,
3945 it specifies a fractional number of seconds to wait.
3946 The MILLISEC argument is obsolete and should be avoided.
3948 If optional fourth arg JUST-THIS-ONE is non-nil, only accept output
3949 from PROCESS, suspending reading output from other processes.
3950 If JUST-THIS-ONE is an integer, don't run any timers either.
3951 Return non-nil if we received any output before the timeout expired. */)
3952 (register Lisp_Object process
, Lisp_Object seconds
, Lisp_Object millisec
, Lisp_Object just_this_one
)
3954 int secs
= -1, usecs
= 0;
3956 if (! NILP (process
))
3957 CHECK_PROCESS (process
);
3959 just_this_one
= Qnil
;
3961 if (!NILP (millisec
))
3962 { /* Obsolete calling convention using integers rather than floats. */
3963 CHECK_NUMBER (millisec
);
3965 seconds
= make_float (XINT (millisec
) / 1000.0);
3968 CHECK_NUMBER (seconds
);
3969 seconds
= make_float (XINT (millisec
) / 1000.0 + XINT (seconds
));
3973 if (!NILP (seconds
))
3975 double duration
= extract_float (seconds
);
3977 duration_to_sec_usec (duration
, &secs
, &usecs
);
3979 else if (!NILP (process
))
3983 (wait_reading_process_output (secs
, usecs
, 0, 0,
3985 !NILP (process
) ? XPROCESS (process
) : NULL
,
3986 NILP (just_this_one
) ? 0 :
3987 !INTEGERP (just_this_one
) ? 1 : -1)
3991 /* Accept a connection for server process SERVER on CHANNEL. */
3993 static int connect_counter
= 0;
3996 server_accept_connection (Lisp_Object server
, int channel
)
3998 Lisp_Object proc
, caller
, name
, buffer
;
3999 Lisp_Object contact
, host
, service
;
4000 struct Lisp_Process
*ps
= XPROCESS (server
);
4001 struct Lisp_Process
*p
;
4005 struct sockaddr_in in
;
4007 struct sockaddr_in6 in6
;
4009 #ifdef HAVE_LOCAL_SOCKETS
4010 struct sockaddr_un un
;
4013 socklen_t len
= sizeof saddr
;
4015 s
= accept (channel
, &saddr
.sa
, &len
);
4024 if (code
== EWOULDBLOCK
)
4028 if (!NILP (ps
->log
))
4029 call3 (ps
->log
, server
, Qnil
,
4030 concat3 (build_string ("accept failed with code"),
4031 Fnumber_to_string (make_number (code
)),
4032 build_string ("\n")));
4038 /* Setup a new process to handle the connection. */
4040 /* Generate a unique identification of the caller, and build contact
4041 information for this process. */
4044 switch (saddr
.sa
.sa_family
)
4048 Lisp_Object args
[5];
4049 unsigned char *ip
= (unsigned char *)&saddr
.in
.sin_addr
.s_addr
;
4050 args
[0] = build_string ("%d.%d.%d.%d");
4051 args
[1] = make_number (*ip
++);
4052 args
[2] = make_number (*ip
++);
4053 args
[3] = make_number (*ip
++);
4054 args
[4] = make_number (*ip
++);
4055 host
= Fformat (5, args
);
4056 service
= make_number (ntohs (saddr
.in
.sin_port
));
4058 args
[0] = build_string (" <%s:%d>");
4061 caller
= Fformat (3, args
);
4068 Lisp_Object args
[9];
4069 uint16_t *ip6
= (uint16_t *)&saddr
.in6
.sin6_addr
;
4071 args
[0] = build_string ("%x:%x:%x:%x:%x:%x:%x:%x");
4072 for (i
= 0; i
< 8; i
++)
4073 args
[i
+1] = make_number (ntohs (ip6
[i
]));
4074 host
= Fformat (9, args
);
4075 service
= make_number (ntohs (saddr
.in
.sin_port
));
4077 args
[0] = build_string (" <[%s]:%d>");
4080 caller
= Fformat (3, args
);
4085 #ifdef HAVE_LOCAL_SOCKETS
4089 caller
= Fnumber_to_string (make_number (connect_counter
));
4090 caller
= concat3 (build_string (" <"), caller
, build_string (">"));
4094 /* Create a new buffer name for this process if it doesn't have a
4095 filter. The new buffer name is based on the buffer name or
4096 process name of the server process concatenated with the caller
4099 if (!NILP (ps
->filter
) && !EQ (ps
->filter
, Qt
))
4103 buffer
= ps
->buffer
;
4105 buffer
= Fbuffer_name (buffer
);
4110 buffer
= concat2 (buffer
, caller
);
4111 buffer
= Fget_buffer_create (buffer
);
4115 /* Generate a unique name for the new server process. Combine the
4116 server process name with the caller identification. */
4118 name
= concat2 (ps
->name
, caller
);
4119 proc
= make_process (name
);
4121 chan_process
[s
] = proc
;
4124 fcntl (s
, F_SETFL
, O_NONBLOCK
);
4127 fcntl (s
, F_SETFL
, O_NDELAY
);
4131 p
= XPROCESS (proc
);
4133 /* Build new contact information for this setup. */
4134 contact
= Fcopy_sequence (ps
->childp
);
4135 contact
= Fplist_put (contact
, QCserver
, Qnil
);
4136 contact
= Fplist_put (contact
, QChost
, host
);
4137 if (!NILP (service
))
4138 contact
= Fplist_put (contact
, QCservice
, service
);
4139 contact
= Fplist_put (contact
, QCremote
,
4140 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
4141 #ifdef HAVE_GETSOCKNAME
4143 if (getsockname (s
, &saddr
.sa
, &len
) == 0)
4144 contact
= Fplist_put (contact
, QClocal
,
4145 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
4148 p
->childp
= contact
;
4149 p
->plist
= Fcopy_sequence (ps
->plist
);
4153 p
->sentinel
= ps
->sentinel
;
4154 p
->filter
= ps
->filter
;
4161 /* Client processes for accepted connections are not stopped initially. */
4162 if (!EQ (p
->filter
, Qt
))
4164 FD_SET (s
, &input_wait_mask
);
4165 FD_SET (s
, &non_keyboard_wait_mask
);
4168 if (s
> max_process_desc
)
4169 max_process_desc
= s
;
4171 /* Setup coding system for new process based on server process.
4172 This seems to be the proper thing to do, as the coding system
4173 of the new process should reflect the settings at the time the
4174 server socket was opened; not the current settings. */
4176 p
->decode_coding_system
= ps
->decode_coding_system
;
4177 p
->encode_coding_system
= ps
->encode_coding_system
;
4178 setup_process_coding_systems (proc
);
4180 p
->decoding_buf
= empty_unibyte_string
;
4181 p
->decoding_carryover
= 0;
4182 p
->encoding_buf
= empty_unibyte_string
;
4184 p
->inherit_coding_system_flag
4185 = (NILP (buffer
) ? 0 : ps
->inherit_coding_system_flag
);
4187 if (!NILP (ps
->log
))
4188 call3 (ps
->log
, server
, proc
,
4189 concat3 (build_string ("accept from "),
4190 (STRINGP (host
) ? host
: build_string ("-")),
4191 build_string ("\n")));
4193 if (!NILP (p
->sentinel
))
4194 exec_sentinel (proc
,
4195 concat3 (build_string ("open from "),
4196 (STRINGP (host
) ? host
: build_string ("-")),
4197 build_string ("\n")));
4200 /* This variable is different from waiting_for_input in keyboard.c.
4201 It is used to communicate to a lisp process-filter/sentinel (via the
4202 function Fwaiting_for_user_input_p below) whether Emacs was waiting
4203 for user-input when that process-filter was called.
4204 waiting_for_input cannot be used as that is by definition 0 when
4205 lisp code is being evalled.
4206 This is also used in record_asynch_buffer_change.
4207 For that purpose, this must be 0
4208 when not inside wait_reading_process_output. */
4209 static int waiting_for_user_input_p
;
4212 wait_reading_process_output_unwind (Lisp_Object data
)
4214 waiting_for_user_input_p
= XINT (data
);
4218 /* This is here so breakpoints can be put on it. */
4220 wait_reading_process_output_1 (void)
4224 /* Use a wrapper around select to work around a bug in gdb 5.3.
4225 Normally, the wrapper is optimized away by inlining.
4227 If emacs is stopped inside select, the gdb backtrace doesn't
4228 show the function which called select, so it is practically
4229 impossible to step through wait_reading_process_output. */
4233 select_wrapper (int n
, fd_set
*rfd
, fd_set
*wfd
, fd_set
*xfd
, struct timeval
*tmo
)
4235 return select (n
, rfd
, wfd
, xfd
, tmo
);
4237 #define select select_wrapper
4240 /* Read and dispose of subprocess output while waiting for timeout to
4241 elapse and/or keyboard input to be available.
4244 timeout in seconds, or
4245 zero for no limit, or
4246 -1 means gobble data immediately available but don't wait for any.
4249 an additional duration to wait, measured in microseconds.
4250 If this is nonzero and time_limit is 0, then the timeout
4251 consists of MICROSECS only.
4253 READ_KBD is a lisp value:
4254 0 to ignore keyboard input, or
4255 1 to return when input is available, or
4256 -1 meaning caller will actually read the input, so don't throw to
4257 the quit handler, or
4259 DO_DISPLAY != 0 means redisplay should be done to show subprocess
4260 output that arrives.
4262 If WAIT_FOR_CELL is a cons cell, wait until its car is non-nil
4263 (and gobble terminal input into the buffer if any arrives).
4265 If WAIT_PROC is specified, wait until something arrives from that
4266 process. The return value is true if we read some input from
4269 If JUST_WAIT_PROC is non-nil, handle only output from WAIT_PROC
4270 (suspending output from other processes). A negative value
4271 means don't run any timers either.
4273 If WAIT_PROC is specified, then the function returns true if we
4274 received input from that process before the timeout elapsed.
4275 Otherwise, return true if we received input from any process. */
4278 wait_reading_process_output (int time_limit
, int microsecs
, int read_kbd
,
4280 Lisp_Object wait_for_cell
,
4281 struct Lisp_Process
*wait_proc
, int just_wait_proc
)
4283 register int channel
, nfds
;
4284 SELECT_TYPE Available
;
4285 SELECT_TYPE Writeok
;
4287 int check_delay
, no_avail
;
4290 EMACS_TIME timeout
, end_time
;
4291 int wait_channel
= -1;
4292 int got_some_input
= 0;
4293 ptrdiff_t count
= SPECPDL_INDEX ();
4295 FD_ZERO (&Available
);
4298 if (time_limit
== 0 && microsecs
== 0 && wait_proc
&& !NILP (Vinhibit_quit
)
4299 && !(CONSP (wait_proc
->status
) && EQ (XCAR (wait_proc
->status
), Qexit
)))
4300 message ("Blocking call to accept-process-output with quit inhibited!!");
4302 /* If wait_proc is a process to watch, set wait_channel accordingly. */
4303 if (wait_proc
!= NULL
)
4304 wait_channel
= wait_proc
->infd
;
4306 record_unwind_protect (wait_reading_process_output_unwind
,
4307 make_number (waiting_for_user_input_p
));
4308 waiting_for_user_input_p
= read_kbd
;
4310 /* Since we may need to wait several times,
4311 compute the absolute time to return at. */
4312 if (time_limit
|| microsecs
)
4314 EMACS_GET_TIME (end_time
);
4315 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
4316 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
4321 int timeout_reduced_for_timers
= 0;
4323 /* If calling from keyboard input, do not quit
4324 since we want to return C-g as an input character.
4325 Otherwise, do pending quit if requested. */
4330 process_pending_signals ();
4333 /* Exit now if the cell we're waiting for became non-nil. */
4334 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4337 /* Compute time from now till when time limit is up */
4338 /* Exit if already run out */
4339 if (time_limit
== -1)
4341 /* -1 specified for timeout means
4342 gobble output available now
4343 but don't wait at all. */
4345 EMACS_SET_SECS_USECS (timeout
, 0, 0);
4347 else if (time_limit
|| microsecs
)
4349 EMACS_GET_TIME (timeout
);
4350 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
4351 if (EMACS_TIME_NEG_P (timeout
))
4356 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
4359 /* Normally we run timers here.
4360 But not if wait_for_cell; in those cases,
4361 the wait is supposed to be short,
4362 and those callers cannot handle running arbitrary Lisp code here. */
4363 if (NILP (wait_for_cell
)
4364 && just_wait_proc
>= 0)
4366 EMACS_TIME timer_delay
;
4370 int old_timers_run
= timers_run
;
4371 struct buffer
*old_buffer
= current_buffer
;
4372 Lisp_Object old_window
= selected_window
;
4374 timer_delay
= timer_check ();
4376 /* If a timer has run, this might have changed buffers
4377 an alike. Make read_key_sequence aware of that. */
4378 if (timers_run
!= old_timers_run
4379 && (old_buffer
!= current_buffer
4380 || !EQ (old_window
, selected_window
))
4381 && waiting_for_user_input_p
== -1)
4382 record_asynch_buffer_change ();
4384 if (timers_run
!= old_timers_run
&& do_display
)
4385 /* We must retry, since a timer may have requeued itself
4386 and that could alter the time_delay. */
4387 redisplay_preserve_echo_area (9);
4391 while (!detect_input_pending ());
4393 /* If there is unread keyboard input, also return. */
4395 && requeued_events_pending_p ())
4398 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
4400 EMACS_TIME difference
;
4401 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
4402 if (EMACS_TIME_NEG_P (difference
))
4404 timeout
= timer_delay
;
4405 timeout_reduced_for_timers
= 1;
4408 /* If time_limit is -1, we are not going to wait at all. */
4409 else if (time_limit
!= -1)
4411 /* This is so a breakpoint can be put here. */
4412 wait_reading_process_output_1 ();
4416 /* Cause C-g and alarm signals to take immediate action,
4417 and cause input available signals to zero out timeout.
4419 It is important that we do this before checking for process
4420 activity. If we get a SIGCHLD after the explicit checks for
4421 process activity, timeout is the only way we will know. */
4423 set_waiting_for_input (&timeout
);
4425 /* If status of something has changed, and no input is
4426 available, notify the user of the change right away. After
4427 this explicit check, we'll let the SIGCHLD handler zap
4428 timeout to get our attention. */
4429 if (update_tick
!= process_tick
)
4434 if (kbd_on_hold_p ())
4437 Atemp
= input_wait_mask
;
4440 EMACS_SET_SECS_USECS (timeout
, 0, 0);
4441 if ((select (max (max_process_desc
, max_input_desc
) + 1,
4443 #ifdef NON_BLOCKING_CONNECT
4444 (num_pending_connects
> 0 ? &Ctemp
: (SELECT_TYPE
*)0),
4448 (SELECT_TYPE
*)0, &timeout
)
4451 /* It's okay for us to do this and then continue with
4452 the loop, since timeout has already been zeroed out. */
4453 clear_waiting_for_input ();
4454 status_notify (NULL
);
4455 if (do_display
) redisplay_preserve_echo_area (13);
4459 /* Don't wait for output from a non-running process. Just
4460 read whatever data has already been received. */
4461 if (wait_proc
&& wait_proc
->raw_status_new
)
4462 update_status (wait_proc
);
4464 && ! EQ (wait_proc
->status
, Qrun
)
4465 && ! EQ (wait_proc
->status
, Qconnect
))
4467 int nread
, total_nread
= 0;
4469 clear_waiting_for_input ();
4470 XSETPROCESS (proc
, wait_proc
);
4472 /* Read data from the process, until we exhaust it. */
4473 while (wait_proc
->infd
>= 0)
4475 nread
= read_process_output (proc
, wait_proc
->infd
);
4482 total_nread
+= nread
;
4486 else if (nread
== -1 && EIO
== errno
)
4490 else if (nread
== -1 && EAGAIN
== errno
)
4494 else if (nread
== -1 && EWOULDBLOCK
== errno
)
4498 if (total_nread
> 0 && do_display
)
4499 redisplay_preserve_echo_area (10);
4504 /* Wait till there is something to do */
4506 if (wait_proc
&& just_wait_proc
)
4508 if (wait_proc
->infd
< 0) /* Terminated */
4510 FD_SET (wait_proc
->infd
, &Available
);
4514 else if (!NILP (wait_for_cell
))
4516 Available
= non_process_wait_mask
;
4523 Available
= non_keyboard_wait_mask
;
4525 Available
= input_wait_mask
;
4526 Writeok
= write_mask
;
4527 #ifdef SELECT_CANT_DO_WRITE_MASK
4532 check_delay
= wait_channel
>= 0 ? 0 : process_output_delay_count
;
4535 /* If frame size has changed or the window is newly mapped,
4536 redisplay now, before we start to wait. There is a race
4537 condition here; if a SIGIO arrives between now and the select
4538 and indicates that a frame is trashed, the select may block
4539 displaying a trashed screen. */
4540 if (frame_garbaged
&& do_display
)
4542 clear_waiting_for_input ();
4543 redisplay_preserve_echo_area (11);
4545 set_waiting_for_input (&timeout
);
4548 /* Skip the `select' call if input is available and we're
4549 waiting for keyboard input or a cell change (which can be
4550 triggered by processing X events). In the latter case, set
4551 nfds to 1 to avoid breaking the loop. */
4553 if ((read_kbd
|| !NILP (wait_for_cell
))
4554 && detect_input_pending ())
4556 nfds
= read_kbd
? 0 : 1;
4563 #ifdef ADAPTIVE_READ_BUFFERING
4564 /* Set the timeout for adaptive read buffering if any
4565 process has non-zero read_output_skip and non-zero
4566 read_output_delay, and we are not reading output for a
4567 specific wait_channel. It is not executed if
4568 Vprocess_adaptive_read_buffering is nil. */
4569 if (process_output_skip
&& check_delay
> 0)
4571 int usecs
= EMACS_USECS (timeout
);
4572 if (EMACS_SECS (timeout
) > 0 || usecs
> READ_OUTPUT_DELAY_MAX
)
4573 usecs
= READ_OUTPUT_DELAY_MAX
;
4574 for (channel
= 0; check_delay
> 0 && channel
<= max_process_desc
; channel
++)
4576 proc
= chan_process
[channel
];
4579 /* Find minimum non-zero read_output_delay among the
4580 processes with non-zero read_output_skip. */
4581 if (XPROCESS (proc
)->read_output_delay
> 0)
4584 if (!XPROCESS (proc
)->read_output_skip
)
4586 FD_CLR (channel
, &Available
);
4587 XPROCESS (proc
)->read_output_skip
= 0;
4588 if (XPROCESS (proc
)->read_output_delay
< usecs
)
4589 usecs
= XPROCESS (proc
)->read_output_delay
;
4592 EMACS_SET_SECS_USECS (timeout
, 0, usecs
);
4593 process_output_skip
= 0;
4596 #if defined (USE_GTK) || defined (HAVE_GCONF) || defined (HAVE_GSETTINGS)
4598 #elif defined (HAVE_NS)
4603 (max (max_process_desc
, max_input_desc
) + 1,
4605 (check_write
? &Writeok
: (SELECT_TYPE
*)0),
4606 (SELECT_TYPE
*)0, &timeout
);
4609 /* GnuTLS buffers data internally. In lowat mode it leaves
4610 some data in the TCP buffers so that select works, but
4611 with custom pull/push functions we need to check if some
4612 data is available in the buffers manually. */
4617 /* We're not waiting on a specific process, so loop
4618 through all the channels and check for data.
4619 This is a workaround needed for some versions of
4620 the gnutls library -- 2.12.14 has been confirmed
4622 http://comments.gmane.org/gmane.emacs.devel/145074 */
4623 for (channel
= 0; channel
< MAXDESC
; ++channel
)
4624 if (! NILP (chan_process
[channel
]))
4626 struct Lisp_Process
*p
=
4627 XPROCESS (chan_process
[channel
]);
4628 if (p
&& p
->gnutls_p
&& p
->infd
4629 && ((emacs_gnutls_record_check_pending
4634 FD_SET (p
->infd
, &Available
);
4640 /* Check this specific channel. */
4641 if (wait_proc
->gnutls_p
/* Check for valid process. */
4642 /* Do we have pending data? */
4643 && ((emacs_gnutls_record_check_pending
4644 (wait_proc
->gnutls_state
))
4648 /* Set to Available. */
4649 FD_SET (wait_proc
->infd
, &Available
);
4658 /* Make C-g and alarm signals set flags again */
4659 clear_waiting_for_input ();
4661 /* If we woke up due to SIGWINCH, actually change size now. */
4662 do_pending_window_change (0);
4664 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
4665 /* We wanted the full specified time, so return now. */
4669 if (xerrno
== EINTR
)
4671 else if (xerrno
== EBADF
)
4674 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
4675 the child's closure of the pts gives the parent a SIGHUP, and
4676 the ptc file descriptor is automatically closed,
4677 yielding EBADF here or at select() call above.
4678 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
4679 in m/ibmrt-aix.h), and here we just ignore the select error.
4680 Cleanup occurs c/o status_notify after SIGCLD. */
4681 no_avail
= 1; /* Cannot depend on values returned */
4687 error ("select error: %s", emacs_strerror (xerrno
));
4692 FD_ZERO (&Available
);
4696 #if 0 /* When polling is used, interrupt_input is 0,
4697 so get_input_pending should read the input.
4698 So this should not be needed. */
4699 /* If we are using polling for input,
4700 and we see input available, make it get read now.
4701 Otherwise it might not actually get read for a second.
4702 And on hpux, since we turn off polling in wait_reading_process_output,
4703 it might never get read at all if we don't spend much time
4704 outside of wait_reading_process_output. */
4705 if (read_kbd
&& interrupt_input
4706 && keyboard_bit_set (&Available
)
4707 && input_polling_used ())
4708 kill (getpid (), SIGALRM
);
4711 /* Check for keyboard input */
4712 /* If there is any, return immediately
4713 to give it higher priority than subprocesses */
4717 int old_timers_run
= timers_run
;
4718 struct buffer
*old_buffer
= current_buffer
;
4719 Lisp_Object old_window
= selected_window
;
4722 if (detect_input_pending_run_timers (do_display
))
4724 swallow_events (do_display
);
4725 if (detect_input_pending_run_timers (do_display
))
4729 /* If a timer has run, this might have changed buffers
4730 an alike. Make read_key_sequence aware of that. */
4731 if (timers_run
!= old_timers_run
4732 && waiting_for_user_input_p
== -1
4733 && (old_buffer
!= current_buffer
4734 || !EQ (old_window
, selected_window
)))
4735 record_asynch_buffer_change ();
4741 /* If there is unread keyboard input, also return. */
4743 && requeued_events_pending_p ())
4746 /* If we are not checking for keyboard input now,
4747 do process events (but don't run any timers).
4748 This is so that X events will be processed.
4749 Otherwise they may have to wait until polling takes place.
4750 That would causes delays in pasting selections, for example.
4752 (We used to do this only if wait_for_cell.) */
4753 if (read_kbd
== 0 && detect_input_pending ())
4755 swallow_events (do_display
);
4756 #if 0 /* Exiting when read_kbd doesn't request that seems wrong, though. */
4757 if (detect_input_pending ())
4762 /* Exit now if the cell we're waiting for became non-nil. */
4763 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4767 /* If we think we have keyboard input waiting, but didn't get SIGIO,
4768 go read it. This can happen with X on BSD after logging out.
4769 In that case, there really is no input and no SIGIO,
4770 but select says there is input. */
4772 if (read_kbd
&& interrupt_input
4773 && keyboard_bit_set (&Available
) && ! noninteractive
)
4774 kill (getpid (), SIGIO
);
4778 got_some_input
|= nfds
> 0;
4780 /* If checking input just got us a size-change event from X,
4781 obey it now if we should. */
4782 if (read_kbd
|| ! NILP (wait_for_cell
))
4783 do_pending_window_change (0);
4785 /* Check for data from a process. */
4786 if (no_avail
|| nfds
== 0)
4789 for (channel
= 0; channel
<= max_input_desc
; ++channel
)
4791 struct fd_callback_data
*d
= &fd_callback_info
[channel
];
4792 if (FD_ISSET (channel
, &Available
)
4794 && (d
->condition
& FOR_READ
) != 0)
4795 d
->func (channel
, d
->data
, 1);
4796 if (FD_ISSET (channel
, &write_mask
)
4798 && (d
->condition
& FOR_WRITE
) != 0)
4799 d
->func (channel
, d
->data
, 0);
4802 for (channel
= 0; channel
<= max_process_desc
; channel
++)
4804 if (FD_ISSET (channel
, &Available
)
4805 && FD_ISSET (channel
, &non_keyboard_wait_mask
)
4806 && !FD_ISSET (channel
, &non_process_wait_mask
))
4810 /* If waiting for this channel, arrange to return as
4811 soon as no more input to be processed. No more
4813 if (wait_channel
== channel
)
4819 proc
= chan_process
[channel
];
4823 /* If this is a server stream socket, accept connection. */
4824 if (EQ (XPROCESS (proc
)->status
, Qlisten
))
4826 server_accept_connection (proc
, channel
);
4830 /* Read data from the process, starting with our
4831 buffered-ahead character if we have one. */
4833 nread
= read_process_output (proc
, channel
);
4836 /* Since read_process_output can run a filter,
4837 which can call accept-process-output,
4838 don't try to read from any other processes
4839 before doing the select again. */
4840 FD_ZERO (&Available
);
4843 redisplay_preserve_echo_area (12);
4846 else if (nread
== -1 && errno
== EWOULDBLOCK
)
4849 /* ISC 4.1 defines both EWOULDBLOCK and O_NONBLOCK,
4850 and Emacs uses O_NONBLOCK, so what we get is EAGAIN. */
4852 else if (nread
== -1 && errno
== EAGAIN
)
4856 else if (nread
== -1 && errno
== EAGAIN
)
4858 /* Note that we cannot distinguish between no input
4859 available now and a closed pipe.
4860 With luck, a closed pipe will be accompanied by
4861 subprocess termination and SIGCHLD. */
4862 else if (nread
== 0 && !NETCONN_P (proc
) && !SERIALCONN_P (proc
))
4864 #endif /* O_NDELAY */
4865 #endif /* O_NONBLOCK */
4867 /* On some OSs with ptys, when the process on one end of
4868 a pty exits, the other end gets an error reading with
4869 errno = EIO instead of getting an EOF (0 bytes read).
4870 Therefore, if we get an error reading and errno =
4871 EIO, just continue, because the child process has
4872 exited and should clean itself up soon (e.g. when we
4875 However, it has been known to happen that the SIGCHLD
4876 got lost. So raise the signal again just in case.
4878 else if (nread
== -1 && errno
== EIO
)
4880 /* Don't do anything if only a pty, with no associated
4881 process (bug#10933). */
4882 if (XPROCESS (proc
)->pid
!= -2) {
4883 /* Clear the descriptor now, so we only raise the signal
4885 FD_CLR (channel
, &input_wait_mask
);
4886 FD_CLR (channel
, &non_keyboard_wait_mask
);
4888 kill (getpid (), SIGCHLD
);
4891 #endif /* HAVE_PTYS */
4892 /* If we can detect process termination, don't consider the
4893 process gone just because its pipe is closed. */
4895 else if (nread
== 0 && !NETCONN_P (proc
) && !SERIALCONN_P (proc
))
4900 /* Preserve status of processes already terminated. */
4901 XPROCESS (proc
)->tick
= ++process_tick
;
4902 deactivate_process (proc
);
4903 if (XPROCESS (proc
)->raw_status_new
)
4904 update_status (XPROCESS (proc
));
4905 if (EQ (XPROCESS (proc
)->status
, Qrun
))
4906 XPROCESS (proc
)->status
4907 = Fcons (Qexit
, Fcons (make_number (256), Qnil
));
4910 #ifdef NON_BLOCKING_CONNECT
4911 if (FD_ISSET (channel
, &Writeok
)
4912 && FD_ISSET (channel
, &connect_wait_mask
))
4914 struct Lisp_Process
*p
;
4916 FD_CLR (channel
, &connect_wait_mask
);
4917 FD_CLR (channel
, &write_mask
);
4918 if (--num_pending_connects
< 0)
4921 proc
= chan_process
[channel
];
4925 p
= XPROCESS (proc
);
4928 /* getsockopt(,,SO_ERROR,,) is said to hang on some systems.
4929 So only use it on systems where it is known to work. */
4931 socklen_t xlen
= sizeof (xerrno
);
4932 if (getsockopt (channel
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &xlen
))
4937 struct sockaddr pname
;
4938 int pnamelen
= sizeof (pname
);
4940 /* If connection failed, getpeername will fail. */
4942 if (getpeername (channel
, &pname
, &pnamelen
) < 0)
4944 /* Obtain connect failure code through error slippage. */
4947 if (errno
== ENOTCONN
&& read (channel
, &dummy
, 1) < 0)
4954 p
->tick
= ++process_tick
;
4955 p
->status
= Fcons (Qfailed
, Fcons (make_number (xerrno
), Qnil
));
4956 deactivate_process (proc
);
4961 /* Execute the sentinel here. If we had relied on
4962 status_notify to do it later, it will read input
4963 from the process before calling the sentinel. */
4964 exec_sentinel (proc
, build_string ("open\n"));
4965 if (!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
4967 FD_SET (p
->infd
, &input_wait_mask
);
4968 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
4972 #endif /* NON_BLOCKING_CONNECT */
4973 } /* end for each file descriptor */
4974 } /* end while exit conditions not met */
4976 unbind_to (count
, Qnil
);
4978 /* If calling from keyboard input, do not quit
4979 since we want to return C-g as an input character.
4980 Otherwise, do pending quit if requested. */
4983 /* Prevent input_pending from remaining set if we quit. */
4984 clear_input_pending ();
4988 return got_some_input
;
4991 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
4994 read_process_output_call (Lisp_Object fun_and_args
)
4996 return apply1 (XCAR (fun_and_args
), XCDR (fun_and_args
));
5000 read_process_output_error_handler (Lisp_Object error_val
)
5002 cmd_error_internal (error_val
, "error in process filter: ");
5004 update_echo_area ();
5005 Fsleep_for (make_number (2), Qnil
);
5009 /* Read pending output from the process channel,
5010 starting with our buffered-ahead character if we have one.
5011 Yield number of decoded characters read.
5013 This function reads at most 4096 characters.
5014 If you want to read all available subprocess output,
5015 you must call it repeatedly until it returns zero.
5017 The characters read are decoded according to PROC's coding-system
5021 read_process_output (Lisp_Object proc
, register int channel
)
5023 register ssize_t nbytes
;
5025 register Lisp_Object outstream
;
5026 register struct Lisp_Process
*p
= XPROCESS (proc
);
5027 register ptrdiff_t opoint
;
5028 struct coding_system
*coding
= proc_decode_coding_system
[channel
];
5029 int carryover
= p
->decoding_carryover
;
5031 ptrdiff_t count
= SPECPDL_INDEX ();
5032 Lisp_Object odeactivate
;
5034 chars
= (char *) alloca (carryover
+ readmax
);
5036 /* See the comment above. */
5037 memcpy (chars
, SDATA (p
->decoding_buf
), carryover
);
5039 #ifdef DATAGRAM_SOCKETS
5040 /* We have a working select, so proc_buffered_char is always -1. */
5041 if (DATAGRAM_CHAN_P (channel
))
5043 socklen_t len
= datagram_address
[channel
].len
;
5044 nbytes
= recvfrom (channel
, chars
+ carryover
, readmax
,
5045 0, datagram_address
[channel
].sa
, &len
);
5050 int buffered
= 0 <= proc_buffered_char
[channel
];
5053 chars
[carryover
] = proc_buffered_char
[channel
];
5054 proc_buffered_char
[channel
] = -1;
5058 nbytes
= emacs_gnutls_read (p
, chars
+ carryover
+ buffered
,
5059 readmax
- buffered
);
5062 nbytes
= emacs_read (channel
, chars
+ carryover
+ buffered
,
5063 readmax
- buffered
);
5064 #ifdef ADAPTIVE_READ_BUFFERING
5065 if (nbytes
> 0 && p
->adaptive_read_buffering
)
5067 int delay
= p
->read_output_delay
;
5070 if (delay
< READ_OUTPUT_DELAY_MAX_MAX
)
5073 process_output_delay_count
++;
5074 delay
+= READ_OUTPUT_DELAY_INCREMENT
* 2;
5077 else if (delay
> 0 && nbytes
== readmax
- buffered
)
5079 delay
-= READ_OUTPUT_DELAY_INCREMENT
;
5081 process_output_delay_count
--;
5083 p
->read_output_delay
= delay
;
5086 p
->read_output_skip
= 1;
5087 process_output_skip
= 1;
5092 nbytes
+= buffered
&& nbytes
<= 0;
5095 p
->decoding_carryover
= 0;
5097 /* At this point, NBYTES holds number of bytes just received
5098 (including the one in proc_buffered_char[channel]). */
5101 if (nbytes
< 0 || coding
->mode
& CODING_MODE_LAST_BLOCK
)
5103 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5106 /* Now set NBYTES how many bytes we must decode. */
5107 nbytes
+= carryover
;
5109 odeactivate
= Vdeactivate_mark
;
5110 /* There's no good reason to let process filters change the current
5111 buffer, and many callers of accept-process-output, sit-for, and
5112 friends don't expect current-buffer to be changed from under them. */
5113 record_unwind_protect (set_buffer_if_live
, Fcurrent_buffer ());
5115 /* Read and dispose of the process output. */
5116 outstream
= p
->filter
;
5117 if (!NILP (outstream
))
5120 int outer_running_asynch_code
= running_asynch_code
;
5121 int waiting
= waiting_for_user_input_p
;
5123 /* No need to gcpro these, because all we do with them later
5124 is test them for EQness, and none of them should be a string. */
5126 Lisp_Object obuffer
, okeymap
;
5127 XSETBUFFER (obuffer
, current_buffer
);
5128 okeymap
= BVAR (current_buffer
, keymap
);
5131 /* We inhibit quit here instead of just catching it so that
5132 hitting ^G when a filter happens to be running won't screw
5134 specbind (Qinhibit_quit
, Qt
);
5135 specbind (Qlast_nonmenu_event
, Qt
);
5137 /* In case we get recursively called,
5138 and we already saved the match data nonrecursively,
5139 save the same match data in safely recursive fashion. */
5140 if (outer_running_asynch_code
)
5143 /* Don't clobber the CURRENT match data, either! */
5144 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
5145 restore_search_regs ();
5146 record_unwind_save_match_data ();
5147 Fset_match_data (tem
, Qt
);
5150 /* For speed, if a search happens within this code,
5151 save the match data in a special nonrecursive fashion. */
5152 running_asynch_code
= 1;
5154 decode_coding_c_string (coding
, (unsigned char *) chars
, nbytes
, Qt
);
5155 text
= coding
->dst_object
;
5156 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5157 /* A new coding system might be found. */
5158 if (!EQ (p
->decode_coding_system
, Vlast_coding_system_used
))
5160 p
->decode_coding_system
= Vlast_coding_system_used
;
5162 /* Don't call setup_coding_system for
5163 proc_decode_coding_system[channel] here. It is done in
5164 detect_coding called via decode_coding above. */
5166 /* If a coding system for encoding is not yet decided, we set
5167 it as the same as coding-system for decoding.
5169 But, before doing that we must check if
5170 proc_encode_coding_system[p->outfd] surely points to a
5171 valid memory because p->outfd will be changed once EOF is
5172 sent to the process. */
5173 if (NILP (p
->encode_coding_system
)
5174 && proc_encode_coding_system
[p
->outfd
])
5176 p
->encode_coding_system
5177 = coding_inherit_eol_type (Vlast_coding_system_used
, Qnil
);
5178 setup_coding_system (p
->encode_coding_system
,
5179 proc_encode_coding_system
[p
->outfd
]);
5183 if (coding
->carryover_bytes
> 0)
5185 if (SCHARS (p
->decoding_buf
) < coding
->carryover_bytes
)
5186 p
->decoding_buf
= make_uninit_string (coding
->carryover_bytes
);
5187 memcpy (SDATA (p
->decoding_buf
), coding
->carryover
,
5188 coding
->carryover_bytes
);
5189 p
->decoding_carryover
= coding
->carryover_bytes
;
5191 if (SBYTES (text
) > 0)
5192 /* FIXME: It's wrong to wrap or not based on debug-on-error, and
5193 sometimes it's simply wrong to wrap (e.g. when called from
5194 accept-process-output). */
5195 internal_condition_case_1 (read_process_output_call
,
5197 Fcons (proc
, Fcons (text
, Qnil
))),
5198 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
5199 read_process_output_error_handler
);
5201 /* If we saved the match data nonrecursively, restore it now. */
5202 restore_search_regs ();
5203 running_asynch_code
= outer_running_asynch_code
;
5205 /* Restore waiting_for_user_input_p as it was
5206 when we were called, in case the filter clobbered it. */
5207 waiting_for_user_input_p
= waiting
;
5209 #if 0 /* Call record_asynch_buffer_change unconditionally,
5210 because we might have changed minor modes or other things
5211 that affect key bindings. */
5212 if (! EQ (Fcurrent_buffer (), obuffer
)
5213 || ! EQ (current_buffer
->keymap
, okeymap
))
5215 /* But do it only if the caller is actually going to read events.
5216 Otherwise there's no need to make him wake up, and it could
5217 cause trouble (for example it would make sit_for return). */
5218 if (waiting_for_user_input_p
== -1)
5219 record_asynch_buffer_change ();
5222 /* If no filter, write into buffer if it isn't dead. */
5223 else if (!NILP (p
->buffer
) && !NILP (BVAR (XBUFFER (p
->buffer
), name
)))
5225 Lisp_Object old_read_only
;
5226 ptrdiff_t old_begv
, old_zv
;
5227 ptrdiff_t old_begv_byte
, old_zv_byte
;
5228 ptrdiff_t before
, before_byte
;
5229 ptrdiff_t opoint_byte
;
5233 Fset_buffer (p
->buffer
);
5235 opoint_byte
= PT_BYTE
;
5236 old_read_only
= BVAR (current_buffer
, read_only
);
5239 old_begv_byte
= BEGV_BYTE
;
5240 old_zv_byte
= ZV_BYTE
;
5242 BVAR (current_buffer
, read_only
) = Qnil
;
5244 /* Insert new output into buffer
5245 at the current end-of-output marker,
5246 thus preserving logical ordering of input and output. */
5247 if (XMARKER (p
->mark
)->buffer
)
5248 SET_PT_BOTH (clip_to_bounds (BEGV
, marker_position (p
->mark
), ZV
),
5249 clip_to_bounds (BEGV_BYTE
, marker_byte_position (p
->mark
),
5252 SET_PT_BOTH (ZV
, ZV_BYTE
);
5254 before_byte
= PT_BYTE
;
5256 /* If the output marker is outside of the visible region, save
5257 the restriction and widen. */
5258 if (! (BEGV
<= PT
&& PT
<= ZV
))
5261 decode_coding_c_string (coding
, (unsigned char *) chars
, nbytes
, Qt
);
5262 text
= coding
->dst_object
;
5263 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5264 /* A new coding system might be found. See the comment in the
5265 similar code in the previous `if' block. */
5266 if (!EQ (p
->decode_coding_system
, Vlast_coding_system_used
))
5268 p
->decode_coding_system
= Vlast_coding_system_used
;
5269 if (NILP (p
->encode_coding_system
)
5270 && proc_encode_coding_system
[p
->outfd
])
5272 p
->encode_coding_system
5273 = coding_inherit_eol_type (Vlast_coding_system_used
, Qnil
);
5274 setup_coding_system (p
->encode_coding_system
,
5275 proc_encode_coding_system
[p
->outfd
]);
5278 if (coding
->carryover_bytes
> 0)
5280 if (SCHARS (p
->decoding_buf
) < coding
->carryover_bytes
)
5281 p
->decoding_buf
= make_uninit_string (coding
->carryover_bytes
);
5282 memcpy (SDATA (p
->decoding_buf
), coding
->carryover
,
5283 coding
->carryover_bytes
);
5284 p
->decoding_carryover
= coding
->carryover_bytes
;
5286 /* Adjust the multibyteness of TEXT to that of the buffer. */
5287 if (NILP (BVAR (current_buffer
, enable_multibyte_characters
))
5288 != ! STRING_MULTIBYTE (text
))
5289 text
= (STRING_MULTIBYTE (text
)
5290 ? Fstring_as_unibyte (text
)
5291 : Fstring_to_multibyte (text
));
5292 /* Insert before markers in case we are inserting where
5293 the buffer's mark is, and the user's next command is Meta-y. */
5294 insert_from_string_before_markers (text
, 0, 0,
5295 SCHARS (text
), SBYTES (text
), 0);
5297 /* Make sure the process marker's position is valid when the
5298 process buffer is changed in the signal_after_change above.
5299 W3 is known to do that. */
5300 if (BUFFERP (p
->buffer
)
5301 && (b
= XBUFFER (p
->buffer
), b
!= current_buffer
))
5302 set_marker_both (p
->mark
, p
->buffer
, BUF_PT (b
), BUF_PT_BYTE (b
));
5304 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
5306 update_mode_lines
++;
5308 /* Make sure opoint and the old restrictions
5309 float ahead of any new text just as point would. */
5310 if (opoint
>= before
)
5312 opoint
+= PT
- before
;
5313 opoint_byte
+= PT_BYTE
- before_byte
;
5315 if (old_begv
> before
)
5317 old_begv
+= PT
- before
;
5318 old_begv_byte
+= PT_BYTE
- before_byte
;
5320 if (old_zv
>= before
)
5322 old_zv
+= PT
- before
;
5323 old_zv_byte
+= PT_BYTE
- before_byte
;
5326 /* If the restriction isn't what it should be, set it. */
5327 if (old_begv
!= BEGV
|| old_zv
!= ZV
)
5328 Fnarrow_to_region (make_number (old_begv
), make_number (old_zv
));
5331 BVAR (current_buffer
, read_only
) = old_read_only
;
5332 SET_PT_BOTH (opoint
, opoint_byte
);
5334 /* Handling the process output should not deactivate the mark. */
5335 Vdeactivate_mark
= odeactivate
;
5337 unbind_to (count
, Qnil
);
5341 /* Sending data to subprocess */
5343 static jmp_buf send_process_frame
;
5344 static Lisp_Object process_sent_to
;
5346 #ifndef FORWARD_SIGNAL_TO_MAIN_THREAD
5347 static void send_process_trap (int) NO_RETURN
;
5351 send_process_trap (int ignore
)
5353 SIGNAL_THREAD_CHECK (SIGPIPE
);
5354 sigunblock (sigmask (SIGPIPE
));
5355 longjmp (send_process_frame
, 1);
5358 /* Send some data to process PROC.
5359 BUF is the beginning of the data; LEN is the number of characters.
5360 OBJECT is the Lisp object that the data comes from. If OBJECT is
5361 nil or t, it means that the data comes from C string.
5363 If OBJECT is not nil, the data is encoded by PROC's coding-system
5364 for encoding before it is sent.
5366 This function can evaluate Lisp code and can garbage collect. */
5369 send_process (volatile Lisp_Object proc
, const char *volatile buf
,
5370 volatile ptrdiff_t len
, volatile Lisp_Object object
)
5372 /* Use volatile to protect variables from being clobbered by longjmp. */
5373 struct Lisp_Process
*p
= XPROCESS (proc
);
5375 struct coding_system
*coding
;
5376 struct gcpro gcpro1
;
5377 void (*volatile old_sigpipe
) (int);
5381 if (p
->raw_status_new
)
5383 if (! EQ (p
->status
, Qrun
))
5384 error ("Process %s not running", SDATA (p
->name
));
5386 error ("Output file descriptor of %s is closed", SDATA (p
->name
));
5388 coding
= proc_encode_coding_system
[p
->outfd
];
5389 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5391 if ((STRINGP (object
) && STRING_MULTIBYTE (object
))
5392 || (BUFFERP (object
)
5393 && !NILP (BVAR (XBUFFER (object
), enable_multibyte_characters
)))
5396 p
->encode_coding_system
5397 = complement_process_encoding_system (p
->encode_coding_system
);
5398 if (!EQ (Vlast_coding_system_used
, p
->encode_coding_system
))
5400 /* The coding system for encoding was changed to raw-text
5401 because we sent a unibyte text previously. Now we are
5402 sending a multibyte text, thus we must encode it by the
5403 original coding system specified for the current process.
5405 Another reason we come here is that the coding system
5406 was just complemented and a new one was returned by
5407 complement_process_encoding_system. */
5408 setup_coding_system (p
->encode_coding_system
, coding
);
5409 Vlast_coding_system_used
= p
->encode_coding_system
;
5411 coding
->src_multibyte
= 1;
5415 coding
->src_multibyte
= 0;
5416 /* For sending a unibyte text, character code conversion should
5417 not take place but EOL conversion should. So, setup raw-text
5418 or one of the subsidiary if we have not yet done it. */
5419 if (CODING_REQUIRE_ENCODING (coding
))
5421 if (CODING_REQUIRE_FLUSHING (coding
))
5423 /* But, before changing the coding, we must flush out data. */
5424 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5425 send_process (proc
, "", 0, Qt
);
5426 coding
->mode
&= CODING_MODE_LAST_BLOCK
;
5428 setup_coding_system (raw_text_coding_system
5429 (Vlast_coding_system_used
),
5431 coding
->src_multibyte
= 0;
5434 coding
->dst_multibyte
= 0;
5436 if (CODING_REQUIRE_ENCODING (coding
))
5438 coding
->dst_object
= Qt
;
5439 if (BUFFERP (object
))
5441 ptrdiff_t from_byte
, from
, to
;
5442 ptrdiff_t save_pt
, save_pt_byte
;
5443 struct buffer
*cur
= current_buffer
;
5445 set_buffer_internal (XBUFFER (object
));
5446 save_pt
= PT
, save_pt_byte
= PT_BYTE
;
5448 from_byte
= PTR_BYTE_POS ((unsigned char *) buf
);
5449 from
= BYTE_TO_CHAR (from_byte
);
5450 to
= BYTE_TO_CHAR (from_byte
+ len
);
5451 TEMP_SET_PT_BOTH (from
, from_byte
);
5452 encode_coding_object (coding
, object
, from
, from_byte
,
5453 to
, from_byte
+ len
, Qt
);
5454 TEMP_SET_PT_BOTH (save_pt
, save_pt_byte
);
5455 set_buffer_internal (cur
);
5457 else if (STRINGP (object
))
5459 encode_coding_object (coding
, object
, 0, 0, SCHARS (object
),
5460 SBYTES (object
), Qt
);
5464 coding
->dst_object
= make_unibyte_string (buf
, len
);
5465 coding
->produced
= len
;
5468 len
= coding
->produced
;
5469 object
= coding
->dst_object
;
5470 buf
= SSDATA (object
);
5473 if (pty_max_bytes
== 0)
5475 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
5476 pty_max_bytes
= fpathconf (p
->outfd
, _PC_MAX_CANON
);
5477 if (pty_max_bytes
< 0)
5478 pty_max_bytes
= 250;
5480 pty_max_bytes
= 250;
5482 /* Deduct one, to leave space for the eof. */
5486 /* 2000-09-21: Emacs 20.7, sparc-sun-solaris-2.6, GCC 2.95.2,
5487 CFLAGS="-g -O": The value of the parameter `proc' is clobbered
5488 when returning with longjmp despite being declared volatile. */
5489 if (!setjmp (send_process_frame
))
5491 p
= XPROCESS (proc
); /* Repair any setjmp clobbering. */
5493 process_sent_to
= proc
;
5496 ptrdiff_t this = len
;
5498 /* Send this batch, using one or more write calls. */
5501 ptrdiff_t written
= 0;
5502 int outfd
= p
->outfd
;
5503 old_sigpipe
= (void (*) (int)) signal (SIGPIPE
, send_process_trap
);
5504 #ifdef DATAGRAM_SOCKETS
5505 if (DATAGRAM_CHAN_P (outfd
))
5507 rv
= sendto (outfd
, buf
, this,
5508 0, datagram_address
[outfd
].sa
,
5509 datagram_address
[outfd
].len
);
5512 else if (errno
== EMSGSIZE
)
5514 signal (SIGPIPE
, old_sigpipe
);
5515 report_file_error ("sending datagram",
5516 Fcons (proc
, Qnil
));
5524 written
= emacs_gnutls_write (p
, buf
, this);
5527 written
= emacs_write (outfd
, buf
, this);
5528 rv
= (written
? 0 : -1);
5529 #ifdef ADAPTIVE_READ_BUFFERING
5530 if (p
->read_output_delay
> 0
5531 && p
->adaptive_read_buffering
== 1)
5533 p
->read_output_delay
= 0;
5534 process_output_delay_count
--;
5535 p
->read_output_skip
= 0;
5539 signal (SIGPIPE
, old_sigpipe
);
5545 || errno
== EWOULDBLOCK
5551 /* Buffer is full. Wait, accepting input;
5552 that may allow the program
5553 to finish doing output and read more. */
5555 ptrdiff_t offset
= 0;
5557 #ifdef BROKEN_PTY_READ_AFTER_EAGAIN
5558 /* A gross hack to work around a bug in FreeBSD.
5559 In the following sequence, read(2) returns
5563 write(2) 954 bytes, get EAGAIN
5564 read(2) 1024 bytes in process_read_output
5565 read(2) 11 bytes in process_read_output
5567 That is, read(2) returns more bytes than have
5568 ever been written successfully. The 1033 bytes
5569 read are the 1022 bytes written successfully
5570 after processing (for example with CRs added if
5571 the terminal is set up that way which it is
5572 here). The same bytes will be seen again in a
5573 later read(2), without the CRs. */
5575 if (errno
== EAGAIN
)
5578 ioctl (p
->outfd
, TIOCFLUSH
, &flags
);
5580 #endif /* BROKEN_PTY_READ_AFTER_EAGAIN */
5582 /* Running filters might relocate buffers or strings.
5583 Arrange to relocate BUF. */
5584 if (BUFFERP (object
))
5585 offset
= BUF_PTR_BYTE_POS (XBUFFER (object
),
5586 (unsigned char *) buf
);
5587 else if (STRINGP (object
))
5588 offset
= buf
- SSDATA (object
);
5590 #ifdef EMACS_HAS_USECS
5591 wait_reading_process_output (0, 20000, 0, 0, Qnil
, NULL
, 0);
5593 wait_reading_process_output (1, 0, 0, 0, Qnil
, NULL
, 0);
5596 if (BUFFERP (object
))
5597 buf
= (char *) BUF_BYTE_ADDRESS (XBUFFER (object
),
5599 else if (STRINGP (object
))
5600 buf
= offset
+ SSDATA (object
);
5603 /* This is a real error. */
5604 report_file_error ("writing to process", Fcons (proc
, Qnil
));
5614 signal (SIGPIPE
, old_sigpipe
);
5615 proc
= process_sent_to
;
5616 p
= XPROCESS (proc
);
5617 p
->raw_status_new
= 0;
5618 p
->status
= Fcons (Qexit
, Fcons (make_number (256), Qnil
));
5619 p
->tick
= ++process_tick
;
5620 deactivate_process (proc
);
5621 error ("SIGPIPE raised on process %s; closed it", SDATA (p
->name
));
5627 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
5629 doc
: /* Send current contents of region as input to PROCESS.
5630 PROCESS may be a process, a buffer, the name of a process or buffer, or
5631 nil, indicating the current buffer's process.
5632 Called from program, takes three arguments, PROCESS, START and END.
5633 If the region is more than 500 characters long,
5634 it is sent in several bunches. This may happen even for shorter regions.
5635 Output from processes can arrive in between bunches. */)
5636 (Lisp_Object process
, Lisp_Object start
, Lisp_Object end
)
5639 ptrdiff_t start1
, end1
;
5641 proc
= get_process (process
);
5642 validate_region (&start
, &end
);
5644 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
5645 move_gap (XINT (start
));
5647 start1
= CHAR_TO_BYTE (XINT (start
));
5648 end1
= CHAR_TO_BYTE (XINT (end
));
5649 send_process (proc
, (char *) BYTE_POS_ADDR (start1
), end1
- start1
,
5650 Fcurrent_buffer ());
5655 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
5657 doc
: /* Send PROCESS the contents of STRING as input.
5658 PROCESS may be a process, a buffer, the name of a process or buffer, or
5659 nil, indicating the current buffer's process.
5660 If STRING is more than 500 characters long,
5661 it is sent in several bunches. This may happen even for shorter strings.
5662 Output from processes can arrive in between bunches. */)
5663 (Lisp_Object process
, Lisp_Object string
)
5666 CHECK_STRING (string
);
5667 proc
= get_process (process
);
5668 send_process (proc
, SSDATA (string
),
5669 SBYTES (string
), string
);
5673 /* Return the foreground process group for the tty/pty that
5674 the process P uses. */
5676 emacs_get_tty_pgrp (struct Lisp_Process
*p
)
5681 if (ioctl (p
->infd
, TIOCGPGRP
, &gid
) == -1 && ! NILP (p
->tty_name
))
5684 /* Some OS:es (Solaris 8/9) does not allow TIOCGPGRP from the
5685 master side. Try the slave side. */
5686 fd
= emacs_open (SSDATA (p
->tty_name
), O_RDONLY
, 0);
5690 ioctl (fd
, TIOCGPGRP
, &gid
);
5694 #endif /* defined (TIOCGPGRP ) */
5699 DEFUN ("process-running-child-p", Fprocess_running_child_p
,
5700 Sprocess_running_child_p
, 0, 1, 0,
5701 doc
: /* Return t if PROCESS has given the terminal to a child.
5702 If the operating system does not make it possible to find out,
5703 return t unconditionally. */)
5704 (Lisp_Object process
)
5706 /* Initialize in case ioctl doesn't exist or gives an error,
5707 in a way that will cause returning t. */
5710 struct Lisp_Process
*p
;
5712 proc
= get_process (process
);
5713 p
= XPROCESS (proc
);
5715 if (!EQ (p
->type
, Qreal
))
5716 error ("Process %s is not a subprocess",
5719 error ("Process %s is not active",
5722 gid
= emacs_get_tty_pgrp (p
);
5729 /* send a signal number SIGNO to PROCESS.
5730 If CURRENT_GROUP is t, that means send to the process group
5731 that currently owns the terminal being used to communicate with PROCESS.
5732 This is used for various commands in shell mode.
5733 If CURRENT_GROUP is lambda, that means send to the process group
5734 that currently owns the terminal, but only if it is NOT the shell itself.
5736 If NOMSG is zero, insert signal-announcements into process's buffers
5739 If we can, we try to signal PROCESS by sending control characters
5740 down the pty. This allows us to signal inferiors who have changed
5741 their uid, for which killpg would return an EPERM error. */
5744 process_send_signal (Lisp_Object process
, int signo
, Lisp_Object current_group
,
5748 register struct Lisp_Process
*p
;
5752 proc
= get_process (process
);
5753 p
= XPROCESS (proc
);
5755 if (!EQ (p
->type
, Qreal
))
5756 error ("Process %s is not a subprocess",
5759 error ("Process %s is not active",
5763 current_group
= Qnil
;
5765 /* If we are using pgrps, get a pgrp number and make it negative. */
5766 if (NILP (current_group
))
5767 /* Send the signal to the shell's process group. */
5771 #ifdef SIGNALS_VIA_CHARACTERS
5772 /* If possible, send signals to the entire pgrp
5773 by sending an input character to it. */
5776 cc_t
*sig_char
= NULL
;
5778 tcgetattr (p
->infd
, &t
);
5783 sig_char
= &t
.c_cc
[VINTR
];
5787 sig_char
= &t
.c_cc
[VQUIT
];
5791 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
5792 sig_char
= &t
.c_cc
[VSWTCH
];
5794 sig_char
= &t
.c_cc
[VSUSP
];
5799 if (sig_char
&& *sig_char
!= CDISABLE
)
5801 send_process (proc
, (char *) sig_char
, 1, Qnil
);
5804 /* If we can't send the signal with a character,
5805 fall through and send it another way. */
5807 /* The code above may fall through if it can't
5808 handle the signal. */
5809 #endif /* defined (SIGNALS_VIA_CHARACTERS) */
5812 /* Get the current pgrp using the tty itself, if we have that.
5813 Otherwise, use the pty to get the pgrp.
5814 On pfa systems, saka@pfu.fujitsu.co.JP writes:
5815 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
5816 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
5817 His patch indicates that if TIOCGPGRP returns an error, then
5818 we should just assume that p->pid is also the process group id. */
5820 gid
= emacs_get_tty_pgrp (p
);
5823 /* If we can't get the information, assume
5824 the shell owns the tty. */
5827 /* It is not clear whether anything really can set GID to -1.
5828 Perhaps on some system one of those ioctls can or could do so.
5829 Or perhaps this is vestigial. */
5832 #else /* ! defined (TIOCGPGRP ) */
5833 /* Can't select pgrps on this system, so we know that
5834 the child itself heads the pgrp. */
5836 #endif /* ! defined (TIOCGPGRP ) */
5838 /* If current_group is lambda, and the shell owns the terminal,
5839 don't send any signal. */
5840 if (EQ (current_group
, Qlambda
) && gid
== p
->pid
)
5848 p
->raw_status_new
= 0;
5850 p
->tick
= ++process_tick
;
5853 status_notify (NULL
);
5854 redisplay_preserve_echo_area (13);
5857 #endif /* ! defined (SIGCONT) */
5861 flush_pending_output (p
->infd
);
5865 /* If we don't have process groups, send the signal to the immediate
5866 subprocess. That isn't really right, but it's better than any
5867 obvious alternative. */
5870 kill (p
->pid
, signo
);
5874 /* gid may be a pid, or minus a pgrp's number */
5876 if (!NILP (current_group
))
5878 if (ioctl (p
->infd
, TIOCSIGSEND
, signo
) == -1)
5879 EMACS_KILLPG (gid
, signo
);
5886 #else /* ! defined (TIOCSIGSEND) */
5887 EMACS_KILLPG (gid
, signo
);
5888 #endif /* ! defined (TIOCSIGSEND) */
5891 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
5892 doc
: /* Interrupt process PROCESS.
5893 PROCESS may be a process, a buffer, or the name of a process or buffer.
5894 No arg or nil means current buffer's process.
5895 Second arg CURRENT-GROUP non-nil means send signal to
5896 the current process-group of the process's controlling terminal
5897 rather than to the process's own process group.
5898 If the process is a shell, this means interrupt current subjob
5899 rather than the shell.
5901 If CURRENT-GROUP is `lambda', and if the shell owns the terminal,
5902 don't send the signal. */)
5903 (Lisp_Object process
, Lisp_Object current_group
)
5905 process_send_signal (process
, SIGINT
, current_group
, 0);
5909 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
5910 doc
: /* Kill process PROCESS. May be process or name of one.
5911 See function `interrupt-process' for more details on usage. */)
5912 (Lisp_Object process
, Lisp_Object current_group
)
5914 process_send_signal (process
, SIGKILL
, current_group
, 0);
5918 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
5919 doc
: /* Send QUIT signal to process PROCESS. May be process or name of one.
5920 See function `interrupt-process' for more details on usage. */)
5921 (Lisp_Object process
, Lisp_Object current_group
)
5923 process_send_signal (process
, SIGQUIT
, current_group
, 0);
5927 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
5928 doc
: /* Stop process PROCESS. May be process or name of one.
5929 See function `interrupt-process' for more details on usage.
5930 If PROCESS is a network or serial process, inhibit handling of incoming
5932 (Lisp_Object process
, Lisp_Object current_group
)
5934 if (PROCESSP (process
) && (NETCONN_P (process
) || SERIALCONN_P (process
)))
5936 struct Lisp_Process
*p
;
5938 p
= XPROCESS (process
);
5939 if (NILP (p
->command
)
5942 FD_CLR (p
->infd
, &input_wait_mask
);
5943 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
5949 error ("No SIGTSTP support");
5951 process_send_signal (process
, SIGTSTP
, current_group
, 0);
5956 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
5957 doc
: /* Continue process PROCESS. May be process or name of one.
5958 See function `interrupt-process' for more details on usage.
5959 If PROCESS is a network or serial process, resume handling of incoming
5961 (Lisp_Object process
, Lisp_Object current_group
)
5963 if (PROCESSP (process
) && (NETCONN_P (process
) || SERIALCONN_P (process
)))
5965 struct Lisp_Process
*p
;
5967 p
= XPROCESS (process
);
5968 if (EQ (p
->command
, Qt
)
5970 && (!EQ (p
->filter
, Qt
) || EQ (p
->status
, Qlisten
)))
5972 FD_SET (p
->infd
, &input_wait_mask
);
5973 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
5975 if (fd_info
[ p
->infd
].flags
& FILE_SERIAL
)
5976 PurgeComm (fd_info
[ p
->infd
].hnd
, PURGE_RXABORT
| PURGE_RXCLEAR
);
5977 #else /* not WINDOWSNT */
5978 tcflush (p
->infd
, TCIFLUSH
);
5979 #endif /* not WINDOWSNT */
5985 process_send_signal (process
, SIGCONT
, current_group
, 0);
5987 error ("No SIGCONT support");
5992 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
5993 2, 2, "sProcess (name or number): \nnSignal code: ",
5994 doc
: /* Send PROCESS the signal with code SIGCODE.
5995 PROCESS may also be a number specifying the process id of the
5996 process to signal; in this case, the process need not be a child of
5998 SIGCODE may be an integer, or a symbol whose name is a signal name. */)
5999 (Lisp_Object process
, Lisp_Object sigcode
)
6003 if (STRINGP (process
))
6005 Lisp_Object tem
= Fget_process (process
);
6008 Lisp_Object process_number
=
6009 string_to_number (SSDATA (process
), 10, 1);
6010 if (INTEGERP (process_number
) || FLOATP (process_number
))
6011 tem
= process_number
;
6015 else if (!NUMBERP (process
))
6016 process
= get_process (process
);
6021 if (NUMBERP (process
))
6022 CONS_TO_INTEGER (process
, pid_t
, pid
);
6025 CHECK_PROCESS (process
);
6026 pid
= XPROCESS (process
)->pid
;
6028 error ("Cannot signal process %s", SDATA (XPROCESS (process
)->name
));
6031 #define parse_signal(NAME, VALUE) \
6032 else if (!xstrcasecmp (name, NAME)) \
6033 XSETINT (sigcode, VALUE)
6035 if (INTEGERP (sigcode
))
6036 CHECK_TYPE_RANGED_INTEGER (int, sigcode
);
6041 CHECK_SYMBOL (sigcode
);
6042 name
= SSDATA (SYMBOL_NAME (sigcode
));
6044 if (!strncmp (name
, "SIG", 3) || !strncmp (name
, "sig", 3))
6050 parse_signal ("usr1", SIGUSR1
);
6053 parse_signal ("usr2", SIGUSR2
);
6056 parse_signal ("term", SIGTERM
);
6059 parse_signal ("hup", SIGHUP
);
6062 parse_signal ("int", SIGINT
);
6065 parse_signal ("quit", SIGQUIT
);
6068 parse_signal ("ill", SIGILL
);
6071 parse_signal ("abrt", SIGABRT
);
6074 parse_signal ("emt", SIGEMT
);
6077 parse_signal ("kill", SIGKILL
);
6080 parse_signal ("fpe", SIGFPE
);
6083 parse_signal ("bus", SIGBUS
);
6086 parse_signal ("segv", SIGSEGV
);
6089 parse_signal ("sys", SIGSYS
);
6092 parse_signal ("pipe", SIGPIPE
);
6095 parse_signal ("alrm", SIGALRM
);
6098 parse_signal ("urg", SIGURG
);
6101 parse_signal ("stop", SIGSTOP
);
6104 parse_signal ("tstp", SIGTSTP
);
6107 parse_signal ("cont", SIGCONT
);
6110 parse_signal ("chld", SIGCHLD
);
6113 parse_signal ("ttin", SIGTTIN
);
6116 parse_signal ("ttou", SIGTTOU
);
6119 parse_signal ("io", SIGIO
);
6122 parse_signal ("xcpu", SIGXCPU
);
6125 parse_signal ("xfsz", SIGXFSZ
);
6128 parse_signal ("vtalrm", SIGVTALRM
);
6131 parse_signal ("prof", SIGPROF
);
6134 parse_signal ("winch", SIGWINCH
);
6137 parse_signal ("info", SIGINFO
);
6140 error ("Undefined signal name %s", name
);
6145 return make_number (kill (pid
, XINT (sigcode
)));
6148 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
6149 doc
: /* Make PROCESS see end-of-file in its input.
6150 EOF comes after any text already sent to it.
6151 PROCESS may be a process, a buffer, the name of a process or buffer, or
6152 nil, indicating the current buffer's process.
6153 If PROCESS is a network connection, or is a process communicating
6154 through a pipe (as opposed to a pty), then you cannot send any more
6155 text to PROCESS after you call this function.
6156 If PROCESS is a serial process, wait until all output written to the
6157 process has been transmitted to the serial port. */)
6158 (Lisp_Object process
)
6161 struct coding_system
*coding
;
6163 if (DATAGRAM_CONN_P (process
))
6166 proc
= get_process (process
);
6167 coding
= proc_encode_coding_system
[XPROCESS (proc
)->outfd
];
6169 /* Make sure the process is really alive. */
6170 if (XPROCESS (proc
)->raw_status_new
)
6171 update_status (XPROCESS (proc
));
6172 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
6173 error ("Process %s not running", SDATA (XPROCESS (proc
)->name
));
6175 if (CODING_REQUIRE_FLUSHING (coding
))
6177 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
6178 send_process (proc
, "", 0, Qnil
);
6181 if (XPROCESS (proc
)->pty_flag
)
6182 send_process (proc
, "\004", 1, Qnil
);
6183 else if (EQ (XPROCESS (proc
)->type
, Qserial
))
6186 if (tcdrain (XPROCESS (proc
)->outfd
) != 0)
6187 error ("tcdrain() failed: %s", emacs_strerror (errno
));
6188 #endif /* not WINDOWSNT */
6189 /* Do nothing on Windows because writes are blocking. */
6193 int old_outfd
, new_outfd
;
6195 #ifdef HAVE_SHUTDOWN
6196 /* If this is a network connection, or socketpair is used
6197 for communication with the subprocess, call shutdown to cause EOF.
6198 (In some old system, shutdown to socketpair doesn't work.
6199 Then we just can't win.) */
6200 if (EQ (XPROCESS (proc
)->type
, Qnetwork
)
6201 || XPROCESS (proc
)->outfd
== XPROCESS (proc
)->infd
)
6202 shutdown (XPROCESS (proc
)->outfd
, 1);
6203 /* In case of socketpair, outfd == infd, so don't close it. */
6204 if (XPROCESS (proc
)->outfd
!= XPROCESS (proc
)->infd
)
6205 emacs_close (XPROCESS (proc
)->outfd
);
6206 #else /* not HAVE_SHUTDOWN */
6207 emacs_close (XPROCESS (proc
)->outfd
);
6208 #endif /* not HAVE_SHUTDOWN */
6209 new_outfd
= emacs_open (NULL_DEVICE
, O_WRONLY
, 0);
6212 old_outfd
= XPROCESS (proc
)->outfd
;
6214 if (!proc_encode_coding_system
[new_outfd
])
6215 proc_encode_coding_system
[new_outfd
]
6216 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
6217 memcpy (proc_encode_coding_system
[new_outfd
],
6218 proc_encode_coding_system
[old_outfd
],
6219 sizeof (struct coding_system
));
6220 memset (proc_encode_coding_system
[old_outfd
], 0,
6221 sizeof (struct coding_system
));
6223 XPROCESS (proc
)->outfd
= new_outfd
;
6228 /* On receipt of a signal that a child status has changed, loop asking
6229 about children with changed statuses until the system says there
6232 All we do is change the status; we do not run sentinels or print
6233 notifications. That is saved for the next time keyboard input is
6234 done, in order to avoid timing errors.
6236 ** WARNING: this can be called during garbage collection.
6237 Therefore, it must not be fooled by the presence of mark bits in
6240 ** USG WARNING: Although it is not obvious from the documentation
6241 in signal(2), on a USG system the SIGCLD handler MUST NOT call
6242 signal() before executing at least one wait(), otherwise the
6243 handler will be called again, resulting in an infinite loop. The
6244 relevant portion of the documentation reads "SIGCLD signals will be
6245 queued and the signal-catching function will be continually
6246 reentered until the queue is empty". Invoking signal() causes the
6247 kernel to reexamine the SIGCLD queue. Fred Fish, UniSoft Systems
6250 ** Malloc WARNING: This should never call malloc either directly or
6251 indirectly; if it does, that is a bug */
6255 sigchld_handler (int signo
)
6257 int old_errno
= errno
;
6259 struct Lisp_Process
*p
;
6261 SIGNAL_THREAD_CHECK (signo
);
6272 #endif /* no WUNTRACED */
6273 /* Keep trying to get a status until we get a definitive result. */
6277 pid
= wait3 (&w
, WNOHANG
| WUNTRACED
, 0);
6279 while (pid
< 0 && errno
== EINTR
);
6283 /* PID == 0 means no processes found, PID == -1 means a real
6284 failure. We have done all our job, so return. */
6291 #endif /* no WNOHANG */
6293 /* Find the process that signaled us, and record its status. */
6295 /* The process can have been deleted by Fdelete_process. */
6296 for (tail
= deleted_pid_list
; CONSP (tail
); tail
= XCDR (tail
))
6298 Lisp_Object xpid
= XCAR (tail
);
6299 if ((INTEGERP (xpid
) && pid
== XINT (xpid
))
6300 || (FLOATP (xpid
) && pid
== XFLOAT_DATA (xpid
)))
6302 XSETCAR (tail
, Qnil
);
6303 goto sigchld_end_of_loop
;
6307 /* Otherwise, if it is asynchronous, it is in Vprocess_alist. */
6309 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6311 proc
= XCDR (XCAR (tail
));
6312 p
= XPROCESS (proc
);
6313 if (EQ (p
->type
, Qreal
) && p
->pid
== pid
)
6318 /* Look for an asynchronous process whose pid hasn't been filled
6321 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6323 proc
= XCDR (XCAR (tail
));
6324 p
= XPROCESS (proc
);
6330 /* Change the status of the process that was found. */
6333 int clear_desc_flag
= 0;
6335 p
->tick
= ++process_tick
;
6337 p
->raw_status_new
= 1;
6339 /* If process has terminated, stop waiting for its output. */
6340 if ((WIFSIGNALED (w
) || WIFEXITED (w
))
6342 clear_desc_flag
= 1;
6344 /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */
6345 if (clear_desc_flag
)
6347 FD_CLR (p
->infd
, &input_wait_mask
);
6348 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
6351 /* Tell wait_reading_process_output that it needs to wake up and
6353 if (input_available_clear_time
)
6354 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
6357 /* There was no asynchronous process found for that pid: we have
6358 a synchronous process. */
6361 synch_process_alive
= 0;
6363 /* Report the status of the synchronous process. */
6365 synch_process_retcode
= WRETCODE (w
);
6366 else if (WIFSIGNALED (w
))
6367 synch_process_termsig
= WTERMSIG (w
);
6369 /* Tell wait_reading_process_output that it needs to wake up and
6371 if (input_available_clear_time
)
6372 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
6375 sigchld_end_of_loop
:
6378 /* On some systems, we must return right away.
6379 If any more processes want to signal us, we will
6381 Otherwise (on systems that have WNOHANG), loop around
6382 to use up all the processes that have something to tell us. */
6383 #if (defined WINDOWSNT \
6384 || (defined USG && !defined GNU_LINUX \
6385 && !(defined HPUX && defined WNOHANG)))
6388 #endif /* USG, but not HPUX with WNOHANG */
6391 #endif /* SIGCHLD */
6395 exec_sentinel_unwind (Lisp_Object data
)
6397 XPROCESS (XCAR (data
))->sentinel
= XCDR (data
);
6402 exec_sentinel_error_handler (Lisp_Object error_val
)
6404 cmd_error_internal (error_val
, "error in process sentinel: ");
6406 update_echo_area ();
6407 Fsleep_for (make_number (2), Qnil
);
6412 exec_sentinel (Lisp_Object proc
, Lisp_Object reason
)
6414 Lisp_Object sentinel
, odeactivate
;
6415 register struct Lisp_Process
*p
= XPROCESS (proc
);
6416 ptrdiff_t count
= SPECPDL_INDEX ();
6417 int outer_running_asynch_code
= running_asynch_code
;
6418 int waiting
= waiting_for_user_input_p
;
6420 if (inhibit_sentinels
)
6423 /* No need to gcpro these, because all we do with them later
6424 is test them for EQness, and none of them should be a string. */
6425 odeactivate
= Vdeactivate_mark
;
6427 Lisp_Object obuffer
, okeymap
;
6428 XSETBUFFER (obuffer
, current_buffer
);
6429 okeymap
= BVAR (current_buffer
, keymap
);
6432 /* There's no good reason to let sentinels change the current
6433 buffer, and many callers of accept-process-output, sit-for, and
6434 friends don't expect current-buffer to be changed from under them. */
6435 record_unwind_protect (set_buffer_if_live
, Fcurrent_buffer ());
6437 sentinel
= p
->sentinel
;
6438 if (NILP (sentinel
))
6441 /* Zilch the sentinel while it's running, to avoid recursive invocations;
6442 assure that it gets restored no matter how the sentinel exits. */
6444 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
6445 /* Inhibit quit so that random quits don't screw up a running filter. */
6446 specbind (Qinhibit_quit
, Qt
);
6447 specbind (Qlast_nonmenu_event
, Qt
); /* Why? --Stef */
6449 /* In case we get recursively called,
6450 and we already saved the match data nonrecursively,
6451 save the same match data in safely recursive fashion. */
6452 if (outer_running_asynch_code
)
6455 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
6456 restore_search_regs ();
6457 record_unwind_save_match_data ();
6458 Fset_match_data (tem
, Qt
);
6461 /* For speed, if a search happens within this code,
6462 save the match data in a special nonrecursive fashion. */
6463 running_asynch_code
= 1;
6465 internal_condition_case_1 (read_process_output_call
,
6467 Fcons (proc
, Fcons (reason
, Qnil
))),
6468 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
6469 exec_sentinel_error_handler
);
6471 /* If we saved the match data nonrecursively, restore it now. */
6472 restore_search_regs ();
6473 running_asynch_code
= outer_running_asynch_code
;
6475 Vdeactivate_mark
= odeactivate
;
6477 /* Restore waiting_for_user_input_p as it was
6478 when we were called, in case the filter clobbered it. */
6479 waiting_for_user_input_p
= waiting
;
6482 if (! EQ (Fcurrent_buffer (), obuffer
)
6483 || ! EQ (current_buffer
->keymap
, okeymap
))
6485 /* But do it only if the caller is actually going to read events.
6486 Otherwise there's no need to make him wake up, and it could
6487 cause trouble (for example it would make sit_for return). */
6488 if (waiting_for_user_input_p
== -1)
6489 record_asynch_buffer_change ();
6491 unbind_to (count
, Qnil
);
6494 /* Report all recent events of a change in process status
6495 (either run the sentinel or output a message).
6496 This is usually done while Emacs is waiting for keyboard input
6497 but can be done at other times. */
6500 status_notify (struct Lisp_Process
*deleting_process
)
6502 register Lisp_Object proc
, buffer
;
6503 Lisp_Object tail
, msg
;
6504 struct gcpro gcpro1
, gcpro2
;
6508 /* We need to gcpro tail; if read_process_output calls a filter
6509 which deletes a process and removes the cons to which tail points
6510 from Vprocess_alist, and then causes a GC, tail is an unprotected
6514 /* Set this now, so that if new processes are created by sentinels
6515 that we run, we get called again to handle their status changes. */
6516 update_tick
= process_tick
;
6518 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6521 register struct Lisp_Process
*p
;
6523 proc
= Fcdr (XCAR (tail
));
6524 p
= XPROCESS (proc
);
6526 if (p
->tick
!= p
->update_tick
)
6528 p
->update_tick
= p
->tick
;
6530 /* If process is still active, read any output that remains. */
6531 while (! EQ (p
->filter
, Qt
)
6532 && ! EQ (p
->status
, Qconnect
)
6533 && ! EQ (p
->status
, Qlisten
)
6534 /* Network or serial process not stopped: */
6535 && ! EQ (p
->command
, Qt
)
6537 && p
!= deleting_process
6538 && read_process_output (proc
, p
->infd
) > 0);
6542 /* Get the text to use for the message. */
6543 if (p
->raw_status_new
)
6545 msg
= status_message (p
);
6547 /* If process is terminated, deactivate it or delete it. */
6549 if (CONSP (p
->status
))
6550 symbol
= XCAR (p
->status
);
6552 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
6553 || EQ (symbol
, Qclosed
))
6555 if (delete_exited_processes
)
6556 remove_process (proc
);
6558 deactivate_process (proc
);
6561 /* The actions above may have further incremented p->tick.
6562 So set p->update_tick again
6563 so that an error in the sentinel will not cause
6564 this code to be run again. */
6565 p
->update_tick
= p
->tick
;
6566 /* Now output the message suitably. */
6567 if (!NILP (p
->sentinel
))
6568 exec_sentinel (proc
, msg
);
6569 /* Don't bother with a message in the buffer
6570 when a process becomes runnable. */
6571 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
6574 struct buffer
*old
= current_buffer
;
6575 ptrdiff_t opoint
, opoint_byte
;
6576 ptrdiff_t before
, before_byte
;
6578 /* Avoid error if buffer is deleted
6579 (probably that's why the process is dead, too) */
6580 if (NILP (BVAR (XBUFFER (buffer
), name
)))
6582 Fset_buffer (buffer
);
6585 opoint_byte
= PT_BYTE
;
6586 /* Insert new output into buffer
6587 at the current end-of-output marker,
6588 thus preserving logical ordering of input and output. */
6589 if (XMARKER (p
->mark
)->buffer
)
6590 Fgoto_char (p
->mark
);
6592 SET_PT_BOTH (ZV
, ZV_BYTE
);
6595 before_byte
= PT_BYTE
;
6597 tem
= BVAR (current_buffer
, read_only
);
6598 BVAR (current_buffer
, read_only
) = Qnil
;
6599 insert_string ("\nProcess ");
6600 Finsert (1, &p
->name
);
6601 insert_string (" ");
6603 BVAR (current_buffer
, read_only
) = tem
;
6604 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
6606 if (opoint
>= before
)
6607 SET_PT_BOTH (opoint
+ (PT
- before
),
6608 opoint_byte
+ (PT_BYTE
- before_byte
));
6610 SET_PT_BOTH (opoint
, opoint_byte
);
6612 set_buffer_internal (old
);
6617 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
6622 DEFUN ("set-process-coding-system", Fset_process_coding_system
,
6623 Sset_process_coding_system
, 1, 3, 0,
6624 doc
: /* Set coding systems of PROCESS to DECODING and ENCODING.
6625 DECODING will be used to decode subprocess output and ENCODING to
6626 encode subprocess input. */)
6627 (register Lisp_Object process
, Lisp_Object decoding
, Lisp_Object encoding
)
6629 register struct Lisp_Process
*p
;
6631 CHECK_PROCESS (process
);
6632 p
= XPROCESS (process
);
6634 error ("Input file descriptor of %s closed", SDATA (p
->name
));
6636 error ("Output file descriptor of %s closed", SDATA (p
->name
));
6637 Fcheck_coding_system (decoding
);
6638 Fcheck_coding_system (encoding
);
6639 encoding
= coding_inherit_eol_type (encoding
, Qnil
);
6640 p
->decode_coding_system
= decoding
;
6641 p
->encode_coding_system
= encoding
;
6642 setup_process_coding_systems (process
);
6647 DEFUN ("process-coding-system",
6648 Fprocess_coding_system
, Sprocess_coding_system
, 1, 1, 0,
6649 doc
: /* Return a cons of coding systems for decoding and encoding of PROCESS. */)
6650 (register Lisp_Object process
)
6652 CHECK_PROCESS (process
);
6653 return Fcons (XPROCESS (process
)->decode_coding_system
,
6654 XPROCESS (process
)->encode_coding_system
);
6657 DEFUN ("set-process-filter-multibyte", Fset_process_filter_multibyte
,
6658 Sset_process_filter_multibyte
, 2, 2, 0,
6659 doc
: /* Set multibyteness of the strings given to PROCESS's filter.
6660 If FLAG is non-nil, the filter is given multibyte strings.
6661 If FLAG is nil, the filter is given unibyte strings. In this case,
6662 all character code conversion except for end-of-line conversion is
6664 (Lisp_Object process
, Lisp_Object flag
)
6666 register struct Lisp_Process
*p
;
6668 CHECK_PROCESS (process
);
6669 p
= XPROCESS (process
);
6671 p
->decode_coding_system
= raw_text_coding_system (p
->decode_coding_system
);
6672 setup_process_coding_systems (process
);
6677 DEFUN ("process-filter-multibyte-p", Fprocess_filter_multibyte_p
,
6678 Sprocess_filter_multibyte_p
, 1, 1, 0,
6679 doc
: /* Return t if a multibyte string is given to PROCESS's filter.*/)
6680 (Lisp_Object process
)
6682 register struct Lisp_Process
*p
;
6683 struct coding_system
*coding
;
6685 CHECK_PROCESS (process
);
6686 p
= XPROCESS (process
);
6687 coding
= proc_decode_coding_system
[p
->infd
];
6688 return (CODING_FOR_UNIBYTE (coding
) ? Qnil
: Qt
);
6697 add_gpm_wait_descriptor (int desc
)
6699 add_keyboard_wait_descriptor (desc
);
6703 delete_gpm_wait_descriptor (int desc
)
6705 delete_keyboard_wait_descriptor (desc
);
6712 /* Return nonzero if *MASK has a bit set
6713 that corresponds to one of the keyboard input descriptors. */
6716 keyboard_bit_set (fd_set
*mask
)
6720 for (fd
= 0; fd
<= max_input_desc
; fd
++)
6721 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
6722 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
6729 #else /* not subprocesses */
6731 /* Defined on msdos.c. */
6732 extern int sys_select (int, SELECT_TYPE
*, SELECT_TYPE
*, SELECT_TYPE
*,
6735 /* Implementation of wait_reading_process_output, assuming that there
6736 are no subprocesses. Used only by the MS-DOS build.
6738 Wait for timeout to elapse and/or keyboard input to be available.
6741 timeout in seconds, or
6742 zero for no limit, or
6743 -1 means gobble data immediately available but don't wait for any.
6745 read_kbd is a Lisp_Object:
6746 0 to ignore keyboard input, or
6747 1 to return when input is available, or
6748 -1 means caller will actually read the input, so don't throw to
6751 see full version for other parameters. We know that wait_proc will
6752 always be NULL, since `subprocesses' isn't defined.
6754 do_display != 0 means redisplay should be done to show subprocess
6755 output that arrives.
6757 Return true if we received input from any process. */
6760 wait_reading_process_output (int time_limit
, int microsecs
, int read_kbd
,
6762 Lisp_Object wait_for_cell
,
6763 struct Lisp_Process
*wait_proc
, int just_wait_proc
)
6766 EMACS_TIME end_time
, timeout
;
6767 SELECT_TYPE waitchannels
;
6770 /* What does time_limit really mean? */
6771 if (time_limit
|| microsecs
)
6773 EMACS_GET_TIME (end_time
);
6774 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
6775 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
6778 /* Turn off periodic alarms (in case they are in use)
6779 and then turn off any other atimers,
6780 because the select emulator uses alarms. */
6782 turn_on_atimers (0);
6786 int timeout_reduced_for_timers
= 0;
6788 /* If calling from keyboard input, do not quit
6789 since we want to return C-g as an input character.
6790 Otherwise, do pending quit if requested. */
6794 /* Exit now if the cell we're waiting for became non-nil. */
6795 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
6798 /* Compute time from now till when time limit is up */
6799 /* Exit if already run out */
6800 if (time_limit
== -1)
6802 /* -1 specified for timeout means
6803 gobble output available now
6804 but don't wait at all. */
6806 EMACS_SET_SECS_USECS (timeout
, 0, 0);
6808 else if (time_limit
|| microsecs
)
6810 EMACS_GET_TIME (timeout
);
6811 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
6812 if (EMACS_TIME_NEG_P (timeout
))
6817 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
6820 /* If our caller will not immediately handle keyboard events,
6821 run timer events directly.
6822 (Callers that will immediately read keyboard events
6823 call timer_delay on their own.) */
6824 if (NILP (wait_for_cell
))
6826 EMACS_TIME timer_delay
;
6830 int old_timers_run
= timers_run
;
6831 timer_delay
= timer_check ();
6832 if (timers_run
!= old_timers_run
&& do_display
)
6833 /* We must retry, since a timer may have requeued itself
6834 and that could alter the time delay. */
6835 redisplay_preserve_echo_area (14);
6839 while (!detect_input_pending ());
6841 /* If there is unread keyboard input, also return. */
6843 && requeued_events_pending_p ())
6846 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
6848 EMACS_TIME difference
;
6849 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
6850 if (EMACS_TIME_NEG_P (difference
))
6852 timeout
= timer_delay
;
6853 timeout_reduced_for_timers
= 1;
6858 /* Cause C-g and alarm signals to take immediate action,
6859 and cause input available signals to zero out timeout. */
6861 set_waiting_for_input (&timeout
);
6863 /* Wait till there is something to do. */
6865 if (! read_kbd
&& NILP (wait_for_cell
))
6866 FD_ZERO (&waitchannels
);
6868 FD_SET (0, &waitchannels
);
6870 /* If a frame has been newly mapped and needs updating,
6871 reprocess its display stuff. */
6872 if (frame_garbaged
&& do_display
)
6874 clear_waiting_for_input ();
6875 redisplay_preserve_echo_area (15);
6877 set_waiting_for_input (&timeout
);
6880 if (read_kbd
&& detect_input_pending ())
6883 FD_ZERO (&waitchannels
);
6886 nfds
= select (1, &waitchannels
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
6891 /* Make C-g and alarm signals set flags again */
6892 clear_waiting_for_input ();
6894 /* If we woke up due to SIGWINCH, actually change size now. */
6895 do_pending_window_change (0);
6897 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
6898 /* We waited the full specified time, so return now. */
6903 /* If the system call was interrupted, then go around the
6905 if (xerrno
== EINTR
)
6906 FD_ZERO (&waitchannels
);
6908 error ("select error: %s", emacs_strerror (xerrno
));
6911 /* Check for keyboard input */
6914 && detect_input_pending_run_timers (do_display
))
6916 swallow_events (do_display
);
6917 if (detect_input_pending_run_timers (do_display
))
6921 /* If there is unread keyboard input, also return. */
6923 && requeued_events_pending_p ())
6926 /* If wait_for_cell. check for keyboard input
6927 but don't run any timers.
6928 ??? (It seems wrong to me to check for keyboard
6929 input at all when wait_for_cell, but the code
6930 has been this way since July 1994.
6931 Try changing this after version 19.31.) */
6932 if (! NILP (wait_for_cell
)
6933 && detect_input_pending ())
6935 swallow_events (do_display
);
6936 if (detect_input_pending ())
6940 /* Exit now if the cell we're waiting for became non-nil. */
6941 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
6950 #endif /* not subprocesses */
6952 /* The following functions are needed even if async subprocesses are
6953 not supported. Some of them are no-op stubs in that case. */
6955 /* Add DESC to the set of keyboard input descriptors. */
6958 add_keyboard_wait_descriptor (int desc
)
6960 #ifdef subprocesses /* actually means "not MSDOS" */
6961 FD_SET (desc
, &input_wait_mask
);
6962 FD_SET (desc
, &non_process_wait_mask
);
6963 if (desc
> max_input_desc
)
6964 max_input_desc
= desc
;
6968 /* From now on, do not expect DESC to give keyboard input. */
6971 delete_keyboard_wait_descriptor (int desc
)
6975 int lim
= max_input_desc
;
6977 FD_CLR (desc
, &input_wait_mask
);
6978 FD_CLR (desc
, &non_process_wait_mask
);
6980 if (desc
== max_input_desc
)
6981 for (fd
= 0; fd
< lim
; fd
++)
6982 if (FD_ISSET (fd
, &input_wait_mask
) || FD_ISSET (fd
, &write_mask
))
6983 max_input_desc
= fd
;
6987 /* Setup coding systems of PROCESS. */
6990 setup_process_coding_systems (Lisp_Object process
)
6993 struct Lisp_Process
*p
= XPROCESS (process
);
6995 int outch
= p
->outfd
;
6996 Lisp_Object coding_system
;
6998 if (inch
< 0 || outch
< 0)
7001 if (!proc_decode_coding_system
[inch
])
7002 proc_decode_coding_system
[inch
]
7003 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
7004 coding_system
= p
->decode_coding_system
;
7005 if (! NILP (p
->filter
))
7007 else if (BUFFERP (p
->buffer
))
7009 if (NILP (BVAR (XBUFFER (p
->buffer
), enable_multibyte_characters
)))
7010 coding_system
= raw_text_coding_system (coding_system
);
7012 setup_coding_system (coding_system
, proc_decode_coding_system
[inch
]);
7014 if (!proc_encode_coding_system
[outch
])
7015 proc_encode_coding_system
[outch
]
7016 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
7017 setup_coding_system (p
->encode_coding_system
,
7018 proc_encode_coding_system
[outch
]);
7022 /* Close all descriptors currently in use for communication
7023 with subprocess. This is used in a newly-forked subprocess
7024 to get rid of irrelevant descriptors. */
7027 close_process_descs (void)
7031 for (i
= 0; i
< MAXDESC
; i
++)
7033 Lisp_Object process
;
7034 process
= chan_process
[i
];
7035 if (!NILP (process
))
7037 int in
= XPROCESS (process
)->infd
;
7038 int out
= XPROCESS (process
)->outfd
;
7041 if (out
>= 0 && in
!= out
)
7048 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
7049 doc
: /* Return the (or a) process associated with BUFFER.
7050 BUFFER may be a buffer or the name of one. */)
7051 (register Lisp_Object buffer
)
7054 register Lisp_Object buf
, tail
, proc
;
7056 if (NILP (buffer
)) return Qnil
;
7057 buf
= Fget_buffer (buffer
);
7058 if (NILP (buf
)) return Qnil
;
7060 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
7062 proc
= Fcdr (XCAR (tail
));
7063 if (PROCESSP (proc
) && EQ (XPROCESS (proc
)->buffer
, buf
))
7066 #endif /* subprocesses */
7070 DEFUN ("process-inherit-coding-system-flag",
7071 Fprocess_inherit_coding_system_flag
, Sprocess_inherit_coding_system_flag
,
7073 doc
: /* Return the value of inherit-coding-system flag for PROCESS.
7074 If this flag is t, `buffer-file-coding-system' of the buffer
7075 associated with PROCESS will inherit the coding system used to decode
7076 the process output. */)
7077 (register Lisp_Object process
)
7080 CHECK_PROCESS (process
);
7081 return XPROCESS (process
)->inherit_coding_system_flag
? Qt
: Qnil
;
7083 /* Ignore the argument and return the value of
7084 inherit-process-coding-system. */
7085 return inherit_process_coding_system
? Qt
: Qnil
;
7089 /* Kill all processes associated with `buffer'.
7090 If `buffer' is nil, kill all processes */
7093 kill_buffer_processes (Lisp_Object buffer
)
7096 Lisp_Object tail
, proc
;
7098 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
7100 proc
= XCDR (XCAR (tail
));
7102 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
7104 if (NETCONN_P (proc
) || SERIALCONN_P (proc
))
7105 Fdelete_process (proc
);
7106 else if (XPROCESS (proc
)->infd
>= 0)
7107 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
7110 #else /* subprocesses */
7111 /* Since we have no subprocesses, this does nothing. */
7112 #endif /* subprocesses */
7115 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
,
7116 Swaiting_for_user_input_p
, 0, 0, 0,
7117 doc
: /* Returns non-nil if Emacs is waiting for input from the user.
7118 This is intended for use by asynchronous process output filters and sentinels. */)
7122 return (waiting_for_user_input_p
? Qt
: Qnil
);
7128 /* Stop reading input from keyboard sources. */
7131 hold_keyboard_input (void)
7136 /* Resume reading input from keyboard sources. */
7139 unhold_keyboard_input (void)
7144 /* Return non-zero if keyboard input is on hold, zero otherwise. */
7147 kbd_on_hold_p (void)
7149 return kbd_is_on_hold
;
7153 /* Enumeration of and access to system processes a-la ps(1). */
7155 DEFUN ("list-system-processes", Flist_system_processes
, Slist_system_processes
,
7157 doc
: /* Return a list of numerical process IDs of all running processes.
7158 If this functionality is unsupported, return nil.
7160 See `process-attributes' for getting attributes of a process given its ID. */)
7163 return list_system_processes ();
7166 DEFUN ("process-attributes", Fprocess_attributes
,
7167 Sprocess_attributes
, 1, 1, 0,
7168 doc
: /* Return attributes of the process given by its PID, a number.
7170 Value is an alist where each element is a cons cell of the form
7174 If this functionality is unsupported, the value is nil.
7176 See `list-system-processes' for getting a list of all process IDs.
7178 The KEYs of the attributes that this function may return are listed
7179 below, together with the type of the associated VALUE (in parentheses).
7180 Not all platforms support all of these attributes; unsupported
7181 attributes will not appear in the returned alist.
7182 Unless explicitly indicated otherwise, numbers can have either
7183 integer or floating point values.
7185 euid -- Effective user User ID of the process (number)
7186 user -- User name corresponding to euid (string)
7187 egid -- Effective user Group ID of the process (number)
7188 group -- Group name corresponding to egid (string)
7189 comm -- Command name (executable name only) (string)
7190 state -- Process state code, such as "S", "R", or "T" (string)
7191 ppid -- Parent process ID (number)
7192 pgrp -- Process group ID (number)
7193 sess -- Session ID, i.e. process ID of session leader (number)
7194 ttname -- Controlling tty name (string)
7195 tpgid -- ID of foreground process group on the process's tty (number)
7196 minflt -- number of minor page faults (number)
7197 majflt -- number of major page faults (number)
7198 cminflt -- cumulative number of minor page faults (number)
7199 cmajflt -- cumulative number of major page faults (number)
7200 utime -- user time used by the process, in the (HIGH LOW USEC) format
7201 stime -- system time used by the process, in the (HIGH LOW USEC) format
7202 time -- sum of utime and stime, in the (HIGH LOW USEC) format
7203 cutime -- user time used by the process and its children, (HIGH LOW USEC)
7204 cstime -- system time used by the process and its children, (HIGH LOW USEC)
7205 ctime -- sum of cutime and cstime, in the (HIGH LOW USEC) format
7206 pri -- priority of the process (number)
7207 nice -- nice value of the process (number)
7208 thcount -- process thread count (number)
7209 start -- time the process started, in the (HIGH LOW USEC) format
7210 vsize -- virtual memory size of the process in KB's (number)
7211 rss -- resident set size of the process in KB's (number)
7212 etime -- elapsed time the process is running, in (HIGH LOW USEC) format
7213 pcpu -- percents of CPU time used by the process (floating-point number)
7214 pmem -- percents of total physical memory used by process's resident set
7215 (floating-point number)
7216 args -- command line which invoked the process (string). */)
7219 return system_process_attributes (pid
);
7229 inhibit_sentinels
= 0;
7233 if (! noninteractive
|| initialized
)
7235 signal (SIGCHLD
, sigchld_handler
);
7238 FD_ZERO (&input_wait_mask
);
7239 FD_ZERO (&non_keyboard_wait_mask
);
7240 FD_ZERO (&non_process_wait_mask
);
7241 FD_ZERO (&write_mask
);
7242 max_process_desc
= 0;
7243 memset (fd_callback_info
, 0, sizeof (fd_callback_info
));
7245 #ifdef NON_BLOCKING_CONNECT
7246 FD_ZERO (&connect_wait_mask
);
7247 num_pending_connects
= 0;
7250 #ifdef ADAPTIVE_READ_BUFFERING
7251 process_output_delay_count
= 0;
7252 process_output_skip
= 0;
7255 /* Don't do this, it caused infinite select loops. The display
7256 method should call add_keyboard_wait_descriptor on stdin if it
7259 FD_SET (0, &input_wait_mask
);
7262 Vprocess_alist
= Qnil
;
7264 deleted_pid_list
= Qnil
;
7266 for (i
= 0; i
< MAXDESC
; i
++)
7268 chan_process
[i
] = Qnil
;
7269 proc_buffered_char
[i
] = -1;
7271 memset (proc_decode_coding_system
, 0, sizeof proc_decode_coding_system
);
7272 memset (proc_encode_coding_system
, 0, sizeof proc_encode_coding_system
);
7273 #ifdef DATAGRAM_SOCKETS
7274 memset (datagram_address
, 0, sizeof datagram_address
);
7278 Lisp_Object subfeatures
= Qnil
;
7279 const struct socket_options
*sopt
;
7281 #define ADD_SUBFEATURE(key, val) \
7282 subfeatures = pure_cons (pure_cons (key, pure_cons (val, Qnil)), subfeatures)
7284 #ifdef NON_BLOCKING_CONNECT
7285 ADD_SUBFEATURE (QCnowait
, Qt
);
7287 #ifdef DATAGRAM_SOCKETS
7288 ADD_SUBFEATURE (QCtype
, Qdatagram
);
7290 #ifdef HAVE_SEQPACKET
7291 ADD_SUBFEATURE (QCtype
, Qseqpacket
);
7293 #ifdef HAVE_LOCAL_SOCKETS
7294 ADD_SUBFEATURE (QCfamily
, Qlocal
);
7296 ADD_SUBFEATURE (QCfamily
, Qipv4
);
7298 ADD_SUBFEATURE (QCfamily
, Qipv6
);
7300 #ifdef HAVE_GETSOCKNAME
7301 ADD_SUBFEATURE (QCservice
, Qt
);
7303 #if defined (O_NONBLOCK) || defined (O_NDELAY)
7304 ADD_SUBFEATURE (QCserver
, Qt
);
7307 for (sopt
= socket_options
; sopt
->name
; sopt
++)
7308 subfeatures
= pure_cons (intern_c_string (sopt
->name
), subfeatures
);
7310 Fprovide (intern_c_string ("make-network-process"), subfeatures
);
7313 #if defined (DARWIN_OS)
7314 /* PTYs are broken on Darwin < 6, but are sometimes useful for interactive
7315 processes. As such, we only change the default value. */
7318 char const *release
= (STRINGP (Voperating_system_release
)
7319 ? SSDATA (Voperating_system_release
)
7321 if (!release
|| !release
[0] || (release
[0] < MIN_PTY_KERNEL_VERSION
7322 && release
[1] == '.')) {
7323 Vprocess_connection_type
= Qnil
;
7327 #endif /* subprocesses */
7332 syms_of_process (void)
7336 DEFSYM (Qprocessp
, "processp");
7337 DEFSYM (Qrun
, "run");
7338 DEFSYM (Qstop
, "stop");
7339 DEFSYM (Qsignal
, "signal");
7341 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
7344 Qexit = intern_c_string ("exit");
7345 staticpro (&Qexit); */
7347 DEFSYM (Qopen
, "open");
7348 DEFSYM (Qclosed
, "closed");
7349 DEFSYM (Qconnect
, "connect");
7350 DEFSYM (Qfailed
, "failed");
7351 DEFSYM (Qlisten
, "listen");
7352 DEFSYM (Qlocal
, "local");
7353 DEFSYM (Qipv4
, "ipv4");
7355 DEFSYM (Qipv6
, "ipv6");
7357 DEFSYM (Qdatagram
, "datagram");
7358 DEFSYM (Qseqpacket
, "seqpacket");
7360 DEFSYM (QCport
, ":port");
7361 DEFSYM (QCspeed
, ":speed");
7362 DEFSYM (QCprocess
, ":process");
7364 DEFSYM (QCbytesize
, ":bytesize");
7365 DEFSYM (QCstopbits
, ":stopbits");
7366 DEFSYM (QCparity
, ":parity");
7367 DEFSYM (Qodd
, "odd");
7368 DEFSYM (Qeven
, "even");
7369 DEFSYM (QCflowcontrol
, ":flowcontrol");
7372 DEFSYM (QCsummary
, ":summary");
7374 DEFSYM (Qreal
, "real");
7375 DEFSYM (Qnetwork
, "network");
7376 DEFSYM (Qserial
, "serial");
7377 DEFSYM (QCbuffer
, ":buffer");
7378 DEFSYM (QChost
, ":host");
7379 DEFSYM (QCservice
, ":service");
7380 DEFSYM (QClocal
, ":local");
7381 DEFSYM (QCremote
, ":remote");
7382 DEFSYM (QCcoding
, ":coding");
7383 DEFSYM (QCserver
, ":server");
7384 DEFSYM (QCnowait
, ":nowait");
7385 DEFSYM (QCsentinel
, ":sentinel");
7386 DEFSYM (QClog
, ":log");
7387 DEFSYM (QCnoquery
, ":noquery");
7388 DEFSYM (QCstop
, ":stop");
7389 DEFSYM (QCoptions
, ":options");
7390 DEFSYM (QCplist
, ":plist");
7392 DEFSYM (Qlast_nonmenu_event
, "last-nonmenu-event");
7394 staticpro (&Vprocess_alist
);
7396 staticpro (&deleted_pid_list
);
7399 #endif /* subprocesses */
7401 DEFSYM (QCname
, ":name");
7402 DEFSYM (QCtype
, ":type");
7404 DEFSYM (Qeuid
, "euid");
7405 DEFSYM (Qegid
, "egid");
7406 DEFSYM (Quser
, "user");
7407 DEFSYM (Qgroup
, "group");
7408 DEFSYM (Qcomm
, "comm");
7409 DEFSYM (Qstate
, "state");
7410 DEFSYM (Qppid
, "ppid");
7411 DEFSYM (Qpgrp
, "pgrp");
7412 DEFSYM (Qsess
, "sess");
7413 DEFSYM (Qttname
, "ttname");
7414 DEFSYM (Qtpgid
, "tpgid");
7415 DEFSYM (Qminflt
, "minflt");
7416 DEFSYM (Qmajflt
, "majflt");
7417 DEFSYM (Qcminflt
, "cminflt");
7418 DEFSYM (Qcmajflt
, "cmajflt");
7419 DEFSYM (Qutime
, "utime");
7420 DEFSYM (Qstime
, "stime");
7421 DEFSYM (Qtime
, "time");
7422 DEFSYM (Qcutime
, "cutime");
7423 DEFSYM (Qcstime
, "cstime");
7424 DEFSYM (Qctime
, "ctime");
7425 DEFSYM (Qpri
, "pri");
7426 DEFSYM (Qnice
, "nice");
7427 DEFSYM (Qthcount
, "thcount");
7428 DEFSYM (Qstart
, "start");
7429 DEFSYM (Qvsize
, "vsize");
7430 DEFSYM (Qrss
, "rss");
7431 DEFSYM (Qetime
, "etime");
7432 DEFSYM (Qpcpu
, "pcpu");
7433 DEFSYM (Qpmem
, "pmem");
7434 DEFSYM (Qargs
, "args");
7436 DEFVAR_BOOL ("delete-exited-processes", delete_exited_processes
,
7437 doc
: /* Non-nil means delete processes immediately when they exit.
7438 A value of nil means don't delete them until `list-processes' is run. */);
7440 delete_exited_processes
= 1;
7443 DEFVAR_LISP ("process-connection-type", Vprocess_connection_type
,
7444 doc
: /* Control type of device used to communicate with subprocesses.
7445 Values are nil to use a pipe, or t or `pty' to use a pty.
7446 The value has no effect if the system has no ptys or if all ptys are busy:
7447 then a pipe is used in any case.
7448 The value takes effect when `start-process' is called. */);
7449 Vprocess_connection_type
= Qt
;
7451 #ifdef ADAPTIVE_READ_BUFFERING
7452 DEFVAR_LISP ("process-adaptive-read-buffering", Vprocess_adaptive_read_buffering
,
7453 doc
: /* If non-nil, improve receive buffering by delaying after short reads.
7454 On some systems, when Emacs reads the output from a subprocess, the output data
7455 is read in very small blocks, potentially resulting in very poor performance.
7456 This behavior can be remedied to some extent by setting this variable to a
7457 non-nil value, as it will automatically delay reading from such processes, to
7458 allow them to produce more output before Emacs tries to read it.
7459 If the value is t, the delay is reset after each write to the process; any other
7460 non-nil value means that the delay is not reset on write.
7461 The variable takes effect when `start-process' is called. */);
7462 Vprocess_adaptive_read_buffering
= Qt
;
7465 defsubr (&Sprocessp
);
7466 defsubr (&Sget_process
);
7467 defsubr (&Sdelete_process
);
7468 defsubr (&Sprocess_status
);
7469 defsubr (&Sprocess_exit_status
);
7470 defsubr (&Sprocess_id
);
7471 defsubr (&Sprocess_name
);
7472 defsubr (&Sprocess_tty_name
);
7473 defsubr (&Sprocess_command
);
7474 defsubr (&Sset_process_buffer
);
7475 defsubr (&Sprocess_buffer
);
7476 defsubr (&Sprocess_mark
);
7477 defsubr (&Sset_process_filter
);
7478 defsubr (&Sprocess_filter
);
7479 defsubr (&Sset_process_sentinel
);
7480 defsubr (&Sprocess_sentinel
);
7481 defsubr (&Sset_process_window_size
);
7482 defsubr (&Sset_process_inherit_coding_system_flag
);
7483 defsubr (&Sset_process_query_on_exit_flag
);
7484 defsubr (&Sprocess_query_on_exit_flag
);
7485 defsubr (&Sprocess_contact
);
7486 defsubr (&Sprocess_plist
);
7487 defsubr (&Sset_process_plist
);
7488 defsubr (&Sprocess_list
);
7489 defsubr (&Sstart_process
);
7490 defsubr (&Sserial_process_configure
);
7491 defsubr (&Smake_serial_process
);
7492 defsubr (&Sset_network_process_option
);
7493 defsubr (&Smake_network_process
);
7494 defsubr (&Sformat_network_address
);
7495 #if defined (HAVE_NET_IF_H)
7497 defsubr (&Snetwork_interface_list
);
7499 #if defined (SIOCGIFADDR) || defined (SIOCGIFHWADDR) || defined (SIOCGIFFLAGS)
7500 defsubr (&Snetwork_interface_info
);
7502 #endif /* defined (HAVE_NET_IF_H) */
7503 #ifdef DATAGRAM_SOCKETS
7504 defsubr (&Sprocess_datagram_address
);
7505 defsubr (&Sset_process_datagram_address
);
7507 defsubr (&Saccept_process_output
);
7508 defsubr (&Sprocess_send_region
);
7509 defsubr (&Sprocess_send_string
);
7510 defsubr (&Sinterrupt_process
);
7511 defsubr (&Skill_process
);
7512 defsubr (&Squit_process
);
7513 defsubr (&Sstop_process
);
7514 defsubr (&Scontinue_process
);
7515 defsubr (&Sprocess_running_child_p
);
7516 defsubr (&Sprocess_send_eof
);
7517 defsubr (&Ssignal_process
);
7518 defsubr (&Swaiting_for_user_input_p
);
7519 defsubr (&Sprocess_type
);
7520 defsubr (&Sset_process_coding_system
);
7521 defsubr (&Sprocess_coding_system
);
7522 defsubr (&Sset_process_filter_multibyte
);
7523 defsubr (&Sprocess_filter_multibyte_p
);
7525 #endif /* subprocesses */
7527 defsubr (&Sget_buffer_process
);
7528 defsubr (&Sprocess_inherit_coding_system_flag
);
7529 defsubr (&Slist_system_processes
);
7530 defsubr (&Sprocess_attributes
);