1 /* Interfaces to system-dependent kernel and library entries.
2 Copyright (C) 1985-1988, 1993-1995, 1999-2016 Free Software
5 This file is part of GNU Emacs.
7 GNU Emacs is free software: you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation, either version 3 of the License, or (at
10 your option) any later version.
12 GNU Emacs is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
27 #endif /* HAVE_PWD_H */
36 #include "sysselect.h"
37 #include "blockinput.h"
39 #if defined DARWIN_OS || defined __FreeBSD__
40 # include <sys/sysctl.h>
44 /* Sparc/ARM machine/frame.h has 'struct frame' which conflicts with Emacs's
45 'struct frame', so rename it. */
46 # define frame freebsd_frame
47 # include <sys/user.h>
55 #define write sys_write
57 #define STDERR_FILENO fileno(GetStdHandle(STD_ERROR_HANDLE))
60 #endif /* not WINDOWSNT */
62 #include <sys/types.h>
66 /* Get SI_SRPC_DOMAIN, if it is available. */
67 #ifdef HAVE_SYS_SYSTEMINFO_H
68 #include <sys/systeminfo.h>
71 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida, MW Aug 1993 */
75 #include <sys/param.h>
82 #ifdef HAVE_SYS_UTSNAME_H
83 #include <sys/utsname.h>
85 #endif /* HAVE_SYS_UTSNAME_H */
89 #include "termhooks.h"
96 /* MS-Windows loads GnuTLS at run time, if available; we don't want to
97 do that during startup just to call gnutls_rnd. */
98 #if 0x020c00 <= GNUTLS_VERSION_NUMBER && !defined WINDOWSNT
99 # include <gnutls/crypto.h>
101 # define emacs_gnutls_global_init() Qnil
102 # define gnutls_rnd(level, data, len) (-1)
107 /* In process.h which conflicts with the local copy. */
109 int _cdecl
_spawnlp (int, const char *, const char *, ...);
110 int _cdecl
_getpid (void);
111 /* The following is needed for O_CLOEXEC, F_SETFD, FD_CLOEXEC, and
112 several prototypes of functions called below. */
113 #include <sys/socket.h>
116 #include "syssignal.h"
119 /* ULLONG_MAX is missing on Red Hat Linux 7.3; see Bug#11781. */
121 #define ULLONG_MAX TYPE_MAXIMUM (unsigned long long int)
124 /* Declare here, including term.h is problematic on some systems. */
125 extern void tputs (const char *, int, int (*)(int));
127 static const int baud_convert
[] =
129 0, 50, 75, 110, 135, 150, 200, 300, 600, 1200,
130 1800, 2400, 4800, 9600, 19200, 38400
133 /* Return the current working directory. The result should be freed
134 with 'free'. Return NULL on errors. */
136 emacs_get_current_dir_name (void)
138 # if HAVE_GET_CURRENT_DIR_NAME && !BROKEN_GET_CURRENT_DIR_NAME
139 # ifdef HYBRID_MALLOC
140 bool use_libc
= bss_sbrk_did_unexec
;
142 bool use_libc
= true;
145 return get_current_dir_name ();
149 char *pwd
= getenv ("PWD");
150 struct stat dotstat
, pwdstat
;
151 /* If PWD is accurate, use it instead of calling getcwd. PWD is
152 sometimes a nicer name, and using it may avoid a fatal error if a
153 parent directory is searchable but not readable. */
155 && (IS_DIRECTORY_SEP (*pwd
) || (*pwd
&& IS_DEVICE_SEP (pwd
[1])))
156 && stat (pwd
, &pwdstat
) == 0
157 && stat (".", &dotstat
) == 0
158 && dotstat
.st_ino
== pwdstat
.st_ino
159 && dotstat
.st_dev
== pwdstat
.st_dev
161 && strlen (pwd
) < MAXPATHLEN
165 buf
= malloc (strlen (pwd
) + 1);
172 size_t buf_size
= 1024;
173 buf
= malloc (buf_size
);
178 if (getcwd (buf
, buf_size
) == buf
)
182 int tmp_errno
= errno
;
188 buf
= realloc (buf
, buf_size
);
197 /* Discard pending input on all input descriptors. */
200 discard_tty_input (void)
203 struct emacs_tty buf
;
208 #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */
209 while (dos_keyread () != -1)
211 #else /* not MSDOS */
213 struct tty_display_info
*tty
;
214 for (tty
= tty_list
; tty
; tty
= tty
->next
)
216 if (tty
->input
) /* Is the device suspended? */
218 emacs_get_tty (fileno (tty
->input
), &buf
);
219 emacs_set_tty (fileno (tty
->input
), &buf
, 0);
223 #endif /* not MSDOS */
224 #endif /* not WINDOWSNT */
230 /* Arrange for character C to be read as the next input from
232 XXX What if we have multiple ttys?
238 if (! (FRAMEP (selected_frame
)
239 && FRAME_LIVE_P (XFRAME (selected_frame
))
240 && FRAME_TERMCAP_P (XFRAME (selected_frame
))))
243 /* Should perhaps error if in batch mode */
245 ioctl (fileno (CURTTY()->input
), TIOCSTI
, &c
);
246 #else /* no TIOCSTI */
247 error ("Cannot stuff terminal input characters in this version of Unix");
248 #endif /* no TIOCSTI */
254 init_baud_rate (int fd
)
264 #else /* not DOS_NT */
269 emacs_ospeed
= cfgetospeed (&sg
);
270 #endif /* not DOS_NT */
273 baud_rate
= (emacs_ospeed
< ARRAYELTS (baud_convert
)
274 ? baud_convert
[emacs_ospeed
] : 9600);
283 /* Wait for the subprocess with process id CHILD to terminate or change status.
284 CHILD must be a child process that has not been reaped.
285 If STATUS is non-null, store the waitpid-style exit status into *STATUS
286 and tell wait_reading_process_output that it needs to look around.
287 Use waitpid-style OPTIONS when waiting.
288 If INTERRUPTIBLE, this function is interruptible by a signal.
290 Return CHILD if successful, 0 if no status is available;
291 the latter is possible only when options & NOHANG. */
293 get_child_status (pid_t child
, int *status
, int options
, bool interruptible
)
297 /* Invoke waitpid only with a known process ID; do not invoke
298 waitpid with a nonpositive argument. Otherwise, Emacs might
299 reap an unwanted process by mistake. For example, invoking
300 waitpid (-1, ...) can mess up glib by reaping glib's subprocesses,
301 so that another thread running glib won't find them. */
304 while ((pid
= waitpid (child
, status
, options
)) < 0)
306 /* Check that CHILD is a child process that has not been reaped,
307 and that STATUS and OPTIONS are valid. Otherwise abort,
308 as continuing after this internal error could cause Emacs to
309 become confused and kill innocent-victim processes. */
313 /* Note: the MS-Windows emulation of waitpid calls QUIT
319 /* If successful and status is requested, tell wait_reading_process_output
320 that it needs to wake up and look around. */
321 if (pid
&& status
&& input_available_clear_time
)
322 *input_available_clear_time
= make_timespec (0, 0);
327 /* Wait for the subprocess with process id CHILD to terminate.
328 CHILD must be a child process that has not been reaped.
329 If STATUS is non-null, store the waitpid-style exit status into *STATUS
330 and tell wait_reading_process_output that it needs to look around.
331 If INTERRUPTIBLE, this function is interruptible by a signal. */
333 wait_for_termination (pid_t child
, int *status
, bool interruptible
)
335 get_child_status (child
, status
, 0, interruptible
);
338 /* Report whether the subprocess with process id CHILD has changed status.
339 Termination counts as a change of status.
340 CHILD must be a child process that has not been reaped.
341 If STATUS is non-null, store the waitpid-style exit status into *STATUS
342 and tell wait_reading_process_output that it needs to look around.
343 Use waitpid-style OPTIONS to check status, but do not wait.
345 Return CHILD if successful, 0 if no status is available because
346 the process's state has not changed. */
348 child_status_changed (pid_t child
, int *status
, int options
)
350 return get_child_status (child
, status
, WNOHANG
| options
, 0);
354 /* Set up the terminal at the other end of a pseudo-terminal that
355 we will be controlling an inferior through.
356 It should not echo or do line-editing, since that is done
357 in Emacs. No padding needed for insertion into an Emacs buffer. */
360 child_setup_tty (int out
)
365 emacs_get_tty (out
, &s
);
366 s
.main
.c_oflag
|= OPOST
; /* Enable output postprocessing */
367 s
.main
.c_oflag
&= ~ONLCR
; /* Disable map of NL to CR-NL on output */
369 /* http://lists.gnu.org/archive/html/emacs-devel/2008-05/msg00406.html
370 Some versions of GNU Hurd do not have FFDLY? */
372 s
.main
.c_oflag
&= ~(NLDLY
|CRDLY
|TABDLY
|BSDLY
|VTDLY
|FFDLY
);
373 /* No output delays */
375 s
.main
.c_oflag
&= ~(NLDLY
|CRDLY
|TABDLY
|BSDLY
|VTDLY
);
376 /* No output delays */
379 s
.main
.c_lflag
&= ~ECHO
; /* Disable echo */
380 s
.main
.c_lflag
|= ISIG
; /* Enable signals */
382 s
.main
.c_iflag
&= ~IUCLC
; /* Disable downcasing on input. */
385 s
.main
.c_iflag
&= ~ISTRIP
; /* don't strip 8th bit on input */
388 s
.main
.c_oflag
&= ~OLCUC
; /* Disable upcasing on output. */
390 s
.main
.c_oflag
&= ~TAB3
; /* Disable tab expansion */
391 s
.main
.c_cflag
= (s
.main
.c_cflag
& ~CSIZE
) | CS8
; /* Don't strip 8th bit */
392 s
.main
.c_cc
[VERASE
] = CDISABLE
; /* disable erase processing */
393 s
.main
.c_cc
[VKILL
] = CDISABLE
; /* disable kill processing */
396 s
.main
.c_cflag
= (s
.main
.c_cflag
& ~CBAUD
) | B9600
; /* baud rate sanity */
399 #ifdef SIGNALS_VIA_CHARACTERS
400 /* the QUIT and INTR character are used in process_send_signal
401 so set them here to something useful. */
402 if (s
.main
.c_cc
[VQUIT
] == CDISABLE
)
403 s
.main
.c_cc
[VQUIT
] = '\\'&037; /* Control-\ */
404 if (s
.main
.c_cc
[VINTR
] == CDISABLE
)
405 s
.main
.c_cc
[VINTR
] = 'C'&037; /* Control-C */
406 #endif /* not SIGNALS_VIA_CHARACTERS */
409 /* Also, PTY overloads NUL and BREAK.
410 don't ignore break, but don't signal either, so it looks like NUL. */
411 s
.main
.c_iflag
&= ~IGNBRK
;
412 s
.main
.c_iflag
&= ~BRKINT
;
413 /* rms: Formerly it set s.main.c_cc[VINTR] to 0377 here
414 unconditionally. Then a SIGNALS_VIA_CHARACTERS conditional
415 would force it to 0377. That looks like duplicated code. */
416 s
.main
.c_cflag
= (s
.main
.c_cflag
& ~CBAUD
) | B9600
; /* baud rate sanity */
419 /* We originally enabled ICANON (and set VEOF to 04), and then had
420 process.c send additional EOF chars to flush the output when faced
421 with long lines, but this leads to weird effects when the
422 subprocess has disabled ICANON and ends up seeing those spurious
423 extra EOFs. So we don't send EOFs any more in
424 process.c:send_process. First we tried to disable ICANON by
425 default, so if a subsprocess sets up ICANON, it's his problem (or
426 the Elisp package that talks to it) to deal with lines that are
427 too long. But this disables some features, such as the ability
428 to send EOF signals. So we re-enabled ICANON but there is no
429 more "send eof to flush" going on (which is wrong and unportable
430 in itself). The correct way to handle too much output is to
431 buffer what could not be written and then write it again when
432 select returns ok for writing. This has it own set of
433 problems. Write is now asynchronous, is that a problem? How much
434 do we buffer, and what do we do when that limit is reached? */
436 s
.main
.c_lflag
|= ICANON
; /* Enable line editing and eof processing */
437 s
.main
.c_cc
[VEOF
] = 'D'&037; /* Control-D */
438 #if 0 /* These settings only apply to non-ICANON mode. */
439 s
.main
.c_cc
[VMIN
] = 1;
440 s
.main
.c_cc
[VTIME
] = 0;
443 emacs_set_tty (out
, &s
, 0);
444 #endif /* not WINDOWSNT */
446 #endif /* not MSDOS */
449 /* Record a signal code and the action for it. */
453 struct sigaction action
;
456 static void save_signal_handlers (struct save_signal
*);
457 static void restore_signal_handlers (struct save_signal
*);
459 /* Suspend the Emacs process; give terminal to its superior. */
467 /* On a system where suspending is not implemented,
468 instead fork a subshell and let it talk directly to the terminal
475 /* Fork a subshell. */
480 #ifdef DOS_NT /* Demacs 1.1.2 91/10/20 Manabu Higashida */
483 char oldwd
[MAXPATHLEN
+1]; /* Fixed length is safe on MSDOS. */
485 char oldwd
[MAX_UTF8_PATH
];
490 struct save_signal saved_handlers
[5];
491 char *str
= SSDATA (encode_current_directory ());
497 char *volatile str_volatile
= str
;
504 error ("Can't spawn subshell");
506 saved_handlers
[0].code
= SIGINT
;
507 saved_handlers
[1].code
= SIGQUIT
;
508 saved_handlers
[2].code
= SIGTERM
;
510 saved_handlers
[3].code
= SIGIO
;
511 saved_handlers
[4].code
= 0;
513 saved_handlers
[3].code
= 0;
517 save_signal_handlers (saved_handlers
);
524 #ifdef DOS_NT /* MW, Aug 1993 */
525 getcwd (oldwd
, sizeof oldwd
);
527 sh
= egetenv ("SUSPEND"); /* KFS, 1994-12-14 */
530 sh
= egetenv ("SHELL");
534 /* Use our buffer's default directory for the subshell. */
535 if (chdir (str
) != 0)
539 _exit (EXIT_CANCELED
);
543 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */
545 char *epwd
= getenv ("PWD");
546 char old_pwd
[MAXPATHLEN
+1+4];
548 /* If PWD is set, pass it with corrected value. */
551 strcpy (old_pwd
, epwd
);
552 setenv ("PWD", str
, 1);
555 chdir (oldwd
); /* FIXME: Do the right thing on chdir failure. */
557 putenv (old_pwd
); /* restore previous value */
559 #else /* not MSDOS */
561 /* Waits for process completion */
562 pid
= _spawnlp (_P_WAIT
, sh
, sh
, NULL
);
563 chdir (oldwd
); /* FIXME: Do the right thing on chdir failure. */
565 write (1, "Can't execute subshell", 22);
566 #else /* not WINDOWSNT */
567 execlp (sh
, sh
, (char *) 0);
569 _exit (errno
== ENOENT
? EXIT_ENOENT
: EXIT_CANNOT_INVOKE
);
570 #endif /* not WINDOWSNT */
571 #endif /* not MSDOS */
574 /* Do this now if we did not do it before. */
576 save_signal_handlers (saved_handlers
);
580 wait_for_termination (pid
, &status
, 0);
582 restore_signal_handlers (saved_handlers
);
586 save_signal_handlers (struct save_signal
*saved_handlers
)
588 while (saved_handlers
->code
)
590 struct sigaction action
;
591 emacs_sigaction_init (&action
, SIG_IGN
);
592 sigaction (saved_handlers
->code
, &action
, &saved_handlers
->action
);
598 restore_signal_handlers (struct save_signal
*saved_handlers
)
600 while (saved_handlers
->code
)
602 sigaction (saved_handlers
->code
, &saved_handlers
->action
, 0);
608 static int old_fcntl_flags
[FD_SETSIZE
];
615 old_fcntl_flags
[fd
] = fcntl (fd
, F_GETFL
, 0) & ~FASYNC
;
616 fcntl (fd
, F_SETFL
, old_fcntl_flags
[fd
] | FASYNC
);
617 interrupts_deferred
= 0;
626 fcntl (fd
, F_SETFL
, old_fcntl_flags
[fd
]);
640 sigemptyset (&unblocked
);
642 sigaddset (&unblocked
, SIGWINCH
);
644 sigaddset (&unblocked
, SIGIO
);
645 pthread_sigmask (SIG_UNBLOCK
, &unblocked
, 0);
647 interrupts_deferred
= 0;
652 unrequest_sigio (void)
660 sigemptyset (&blocked
);
662 sigaddset (&blocked
, SIGWINCH
);
664 sigaddset (&blocked
, SIGIO
);
665 pthread_sigmask (SIG_BLOCK
, &blocked
, 0);
666 interrupts_deferred
= 1;
674 block_child_signal (sigset_t
*oldset
)
677 sigemptyset (&blocked
);
678 sigaddset (&blocked
, SIGCHLD
);
679 sigaddset (&blocked
, SIGINT
);
680 pthread_sigmask (SIG_BLOCK
, &blocked
, oldset
);
683 /* Unblock SIGCHLD. */
686 unblock_child_signal (sigset_t
const *oldset
)
688 pthread_sigmask (SIG_SETMASK
, oldset
, 0);
693 /* Saving and restoring the process group of Emacs's terminal. */
695 /* The process group of which Emacs was a member when it initially
698 If Emacs was in its own process group (i.e. inherited_pgroup ==
699 getpid ()), then we know we're running under a shell with job
700 control (Emacs would never be run as part of a pipeline).
703 If Emacs was not in its own process group, then we know we're
704 running under a shell (or a caller) that doesn't know how to
705 separate itself from Emacs (like sh). Emacs must be in its own
706 process group in order to receive SIGIO correctly. In this
707 situation, we put ourselves in our own pgroup, forcibly set the
708 tty's pgroup to our pgroup, and make sure to restore and reinstate
709 the tty's pgroup just like any other terminal setting. If
710 inherited_group was not the tty's pgroup, then we'll get a
711 SIGTTmumble when we try to change the tty's pgroup, and a CONT if
712 it goes foreground in the future, which is what should happen. */
714 static pid_t inherited_pgroup
;
717 init_foreground_group (void)
719 pid_t pgrp
= getpgrp ();
720 inherited_pgroup
= getpid () == pgrp
? 0 : pgrp
;
723 /* Block and unblock SIGTTOU. */
726 block_tty_out_signal (sigset_t
*oldset
)
730 sigemptyset (&blocked
);
731 sigaddset (&blocked
, SIGTTOU
);
732 pthread_sigmask (SIG_BLOCK
, &blocked
, oldset
);
737 unblock_tty_out_signal (sigset_t
const *oldset
)
740 pthread_sigmask (SIG_SETMASK
, oldset
, 0);
744 /* Safely set a controlling terminal FD's process group to PGID.
745 If we are not in the foreground already, POSIX requires tcsetpgrp
746 to deliver a SIGTTOU signal, which would stop us. This is an
747 annoyance, so temporarily ignore the signal.
749 In practice, platforms lacking SIGTTOU also lack tcsetpgrp, so
750 skip all this unless SIGTTOU is defined. */
752 tcsetpgrp_without_stopping (int fd
, pid_t pgid
)
757 block_tty_out_signal (&oldset
);
758 tcsetpgrp (fd
, pgid
);
759 unblock_tty_out_signal (&oldset
);
764 /* Split off the foreground process group to Emacs alone. When we are
765 in the foreground, but not started in our own process group,
766 redirect the tty device handle FD to point to our own process
767 group. FD must be the file descriptor of the controlling tty. */
769 narrow_foreground_group (int fd
)
771 if (inherited_pgroup
&& setpgid (0, 0) == 0)
772 tcsetpgrp_without_stopping (fd
, getpid ());
775 /* Set the tty to our original foreground group. */
777 widen_foreground_group (int fd
)
779 if (inherited_pgroup
&& setpgid (0, inherited_pgroup
) == 0)
780 tcsetpgrp_without_stopping (fd
, inherited_pgroup
);
783 /* Getting and setting emacs_tty structures. */
785 /* Set *TC to the parameters associated with the terminal FD,
786 or clear it if the parameters are not available.
787 Return 0 on success, -1 on failure. */
789 emacs_get_tty (int fd
, struct emacs_tty
*settings
)
791 /* Retrieve the primary parameters - baud rate, character size, etcetera. */
792 memset (&settings
->main
, 0, sizeof (settings
->main
));
795 HANDLE h
= (HANDLE
)_get_osfhandle (fd
);
798 if (h
&& h
!= INVALID_HANDLE_VALUE
&& GetConsoleMode (h
, &console_mode
))
800 settings
->main
= console_mode
;
803 #endif /* WINDOWSNT */
806 /* We have those nifty POSIX tcmumbleattr functions. */
807 return tcgetattr (fd
, &settings
->main
);
812 /* Set the parameters of the tty on FD according to the contents of
813 *SETTINGS. If FLUSHP, discard input.
814 Return 0 if all went well, and -1 (setting errno) if anything failed. */
817 emacs_set_tty (int fd
, struct emacs_tty
*settings
, bool flushp
)
819 /* Set the primary parameters - baud rate, character size, etcetera. */
822 HANDLE h
= (HANDLE
)_get_osfhandle (fd
);
824 if (h
&& h
!= INVALID_HANDLE_VALUE
)
828 /* Assume the handle is open for input. */
830 FlushConsoleInputBuffer (h
);
831 new_mode
= settings
->main
;
832 SetConsoleMode (h
, new_mode
);
834 #endif /* WINDOWSNT */
837 /* We have those nifty POSIX tcmumbleattr functions.
838 William J. Smith <wjs@wiis.wang.com> writes:
839 "POSIX 1003.1 defines tcsetattr to return success if it was
840 able to perform any of the requested actions, even if some
841 of the requested actions could not be performed.
842 We must read settings back to ensure tty setup properly.
843 AIX requires this to keep tty from hanging occasionally." */
844 /* This make sure that we don't loop indefinitely in here. */
845 for (i
= 0 ; i
< 10 ; i
++)
846 if (tcsetattr (fd
, flushp
? TCSAFLUSH
: TCSADRAIN
, &settings
->main
) < 0)
857 memset (&new, 0, sizeof (new));
858 /* Get the current settings, and see if they're what we asked for. */
859 tcgetattr (fd
, &new);
860 /* We cannot use memcmp on the whole structure here because under
861 * aix386 the termios structure has some reserved field that may
864 if ( new.c_iflag
== settings
->main
.c_iflag
865 && new.c_oflag
== settings
->main
.c_oflag
866 && new.c_cflag
== settings
->main
.c_cflag
867 && new.c_lflag
== settings
->main
.c_lflag
868 && memcmp (new.c_cc
, settings
->main
.c_cc
, NCCS
) == 0)
875 /* We have survived the tempest. */
882 static int old_fcntl_owner
[FD_SETSIZE
];
883 #endif /* F_SETOWN */
885 /* This may also be defined in stdio,
886 but if so, this does no harm,
887 and using the same name avoids wasting the other one's space. */
890 unsigned char _sobuf
[BUFSIZ
+8];
895 /* Initialize the terminal mode on all tty devices that are currently
899 init_all_sys_modes (void)
901 struct tty_display_info
*tty
;
902 for (tty
= tty_list
; tty
; tty
= tty
->next
)
903 init_sys_modes (tty
);
906 /* Initialize the terminal mode on the given tty device. */
909 init_sys_modes (struct tty_display_info
*tty_out
)
911 struct emacs_tty tty
;
912 Lisp_Object terminal
;
914 Vtty_erase_char
= Qnil
;
919 if (!tty_out
->output
)
920 return; /* The tty is suspended. */
922 narrow_foreground_group (fileno (tty_out
->input
));
924 if (! tty_out
->old_tty
)
925 tty_out
->old_tty
= xmalloc (sizeof *tty_out
->old_tty
);
927 emacs_get_tty (fileno (tty_out
->input
), tty_out
->old_tty
);
929 tty
= *tty_out
->old_tty
;
931 #if !defined (DOS_NT)
932 XSETINT (Vtty_erase_char
, tty
.main
.c_cc
[VERASE
]);
934 tty
.main
.c_iflag
|= (IGNBRK
); /* Ignore break condition */
935 tty
.main
.c_iflag
&= ~ICRNL
; /* Disable map of CR to NL on input */
936 #ifdef INLCR /* I'm just being cautious,
937 since I can't check how widespread INLCR is--rms. */
938 tty
.main
.c_iflag
&= ~INLCR
; /* Disable map of NL to CR on input */
941 tty
.main
.c_iflag
&= ~ISTRIP
; /* don't strip 8th bit on input */
943 tty
.main
.c_lflag
&= ~ECHO
; /* Disable echo */
944 tty
.main
.c_lflag
&= ~ICANON
; /* Disable erase/kill processing */
946 tty
.main
.c_lflag
&= ~IEXTEN
; /* Disable other editing characters. */
948 tty
.main
.c_lflag
|= ISIG
; /* Enable signals */
949 if (tty_out
->flow_control
)
951 tty
.main
.c_iflag
|= IXON
; /* Enable start/stop output control */
953 tty
.main
.c_iflag
&= ~IXANY
;
957 tty
.main
.c_iflag
&= ~IXON
; /* Disable start/stop output control */
958 tty
.main
.c_oflag
&= ~ONLCR
; /* Disable map of NL to CR-NL
960 tty
.main
.c_oflag
&= ~TAB3
; /* Disable tab expansion */
962 if (tty_out
->meta_key
)
964 tty
.main
.c_cflag
|= CS8
; /* allow 8th bit on input */
965 tty
.main
.c_cflag
&= ~PARENB
;/* Don't check parity */
969 XSETTERMINAL(terminal
, tty_out
->terminal
);
970 if (!NILP (Fcontrolling_tty_p (terminal
)))
972 tty
.main
.c_cc
[VINTR
] = quit_char
; /* C-g (usually) gives SIGINT */
973 /* Set up C-g for both SIGQUIT and SIGINT.
974 We don't know which we will get, but we handle both alike
975 so which one it really gives us does not matter. */
976 tty
.main
.c_cc
[VQUIT
] = quit_char
;
980 /* We normally don't get interrupt or quit signals from tty
981 devices other than our controlling terminal; therefore,
982 we must handle C-g as normal input. Unfortunately, this
983 means that the interrupt and quit feature must be
984 disabled on secondary ttys, or we would not even see the
987 Note that even though emacsclient could have special code
988 to pass SIGINT to Emacs, we should _not_ enable
989 interrupt/quit keys for emacsclient frames. This means
990 that we can't break out of loops in C code from a
991 secondary tty frame, but we can always decide what
992 display the C-g came from, which is more important from a
993 usability point of view. (Consider the case when two
994 people work together using the same Emacs instance.) */
995 tty
.main
.c_cc
[VINTR
] = CDISABLE
;
996 tty
.main
.c_cc
[VQUIT
] = CDISABLE
;
998 tty
.main
.c_cc
[VMIN
] = 1; /* Input should wait for at least 1 char */
999 tty
.main
.c_cc
[VTIME
] = 0; /* no matter how long that takes. */
1001 tty
.main
.c_cc
[VSWTCH
] = CDISABLE
; /* Turn off shell layering use
1006 tty
.main
.c_cc
[VSUSP
] = CDISABLE
; /* Turn off handling of C-z. */
1009 tty
.main
.c_cc
[V_DSUSP
] = CDISABLE
; /* Turn off handling of C-y. */
1010 #endif /* V_DSUSP */
1011 #ifdef VDSUSP /* Some systems have VDSUSP, some have V_DSUSP. */
1012 tty
.main
.c_cc
[VDSUSP
] = CDISABLE
;
1015 tty
.main
.c_cc
[VLNEXT
] = CDISABLE
;
1018 tty
.main
.c_cc
[VREPRINT
] = CDISABLE
;
1019 #endif /* VREPRINT */
1021 tty
.main
.c_cc
[VWERASE
] = CDISABLE
;
1022 #endif /* VWERASE */
1024 tty
.main
.c_cc
[VDISCARD
] = CDISABLE
;
1025 #endif /* VDISCARD */
1027 if (tty_out
->flow_control
)
1030 tty
.main
.c_cc
[VSTART
] = '\021';
1033 tty
.main
.c_cc
[VSTOP
] = '\023';
1039 tty
.main
.c_cc
[VSTART
] = CDISABLE
;
1042 tty
.main
.c_cc
[VSTOP
] = CDISABLE
;
1047 tty
.main
.c_cc
[VSTRT
] = CDISABLE
;
1048 tty
.main
.c_cc
[VSTOP
] = CDISABLE
;
1049 tty
.main
.c_cc
[VSUSP
] = CDISABLE
;
1050 tty
.main
.c_cc
[VDSUSP
] = CDISABLE
;
1051 if (tty_out
->flow_control
)
1054 tty
.main
.c_cc
[VSTART
] = '\021';
1057 tty
.main
.c_cc
[VSTOP
] = '\023';
1060 /* Also, PTY overloads NUL and BREAK.
1061 don't ignore break, but don't signal either, so it looks like NUL.
1062 This really serves a purpose only if running in an XTERM window
1063 or via TELNET or the like, but does no harm elsewhere. */
1064 tty
.main
.c_iflag
&= ~IGNBRK
;
1065 tty
.main
.c_iflag
&= ~BRKINT
;
1067 #endif /* not DOS_NT */
1069 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida, MW Aug 1993 */
1070 if (!tty_out
->term_initted
)
1071 internal_terminal_init ();
1072 dos_ttraw (tty_out
);
1075 emacs_set_tty (fileno (tty_out
->input
), &tty
, 0);
1077 /* This code added to insure that, if flow-control is not to be used,
1078 we have an unlocked terminal at the start. */
1081 if (!tty_out
->flow_control
) ioctl (fileno (tty_out
->input
), TCXONC
, 1);
1084 if (!tty_out
->flow_control
) ioctl (fileno (tty_out
->input
), TIOCSTART
, 0);
1087 #if !defined (DOS_NT)
1089 if (!tty_out
->flow_control
) tcflow (fileno (tty_out
->input
), TCOON
);
1094 if (interrupt_input
)
1096 old_fcntl_owner
[fileno (tty_out
->input
)] =
1097 fcntl (fileno (tty_out
->input
), F_GETOWN
, 0);
1098 fcntl (fileno (tty_out
->input
), F_SETOWN
, getpid ());
1099 init_sigio (fileno (tty_out
->input
));
1101 if (gpm_tty
== tty_out
)
1103 /* Arrange for mouse events to give us SIGIO signals. */
1104 fcntl (gpm_fd
, F_SETOWN
, getpid ());
1105 fcntl (gpm_fd
, F_SETFL
, fcntl (gpm_fd
, F_GETFL
, 0) | O_NONBLOCK
);
1106 init_sigio (gpm_fd
);
1108 #endif /* HAVE_GPM */
1110 #endif /* F_GETOWN */
1113 /* This symbol is defined on recent USG systems.
1114 Someone says without this call USG won't really buffer the file
1115 even with a call to setbuf. */
1116 setvbuf (tty_out
->output
, (char *) _sobuf
, _IOFBF
, sizeof _sobuf
);
1118 setbuf (tty_out
->output
, (char *) _sobuf
);
1121 if (tty_out
->terminal
->set_terminal_modes_hook
)
1122 tty_out
->terminal
->set_terminal_modes_hook (tty_out
->terminal
);
1124 if (!tty_out
->term_initted
)
1126 Lisp_Object tail
, frame
;
1127 FOR_EACH_FRAME (tail
, frame
)
1129 /* XXX This needs to be revised. */
1130 if (FRAME_TERMCAP_P (XFRAME (frame
))
1131 && FRAME_TTY (XFRAME (frame
)) == tty_out
)
1132 init_frame_faces (XFRAME (frame
));
1136 if (tty_out
->term_initted
&& no_redraw_on_reenter
)
1138 /* We used to call "direct_output_forward_char(0)" here,
1139 but it's not clear why, since it may not do anything anyway. */
1143 Lisp_Object tail
, frame
;
1145 FOR_EACH_FRAME (tail
, frame
)
1147 if ((FRAME_TERMCAP_P (XFRAME (frame
))
1148 || FRAME_MSDOS_P (XFRAME (frame
)))
1149 && FRAME_TTY (XFRAME (frame
)) == tty_out
)
1150 FRAME_GARBAGED_P (XFRAME (frame
)) = 1;
1154 tty_out
->term_initted
= 1;
1157 /* Return true if safe to use tabs in output.
1158 At the time this is called, init_sys_modes has not been done yet. */
1161 tabs_safe_p (int fd
)
1163 struct emacs_tty etty
;
1165 emacs_get_tty (fd
, &etty
);
1168 return ((etty
.main
.c_oflag
& TABDLY
) != TAB3
);
1169 #else /* not TABDLY */
1171 #endif /* not TABDLY */
1177 /* Discard echoing. */
1180 suppress_echo_on_tty (int fd
)
1182 struct emacs_tty etty
;
1184 emacs_get_tty (fd
, &etty
);
1186 /* Set raw input mode. */
1189 etty
.main
.c_lflag
&= ~ICANON
; /* Disable buffering */
1190 etty
.main
.c_lflag
&= ~ECHO
; /* Disable echoing */
1191 #endif /* ! WINDOWSNT */
1192 emacs_set_tty (fd
, &etty
, 0);
1195 /* Get terminal size from system.
1196 Store number of lines into *HEIGHTP and width into *WIDTHP.
1197 We store 0 if there's no valid information. */
1200 get_tty_size (int fd
, int *widthp
, int *heightp
)
1202 #if defined TIOCGWINSZ
1205 struct winsize size
;
1207 if (ioctl (fd
, TIOCGWINSZ
, &size
) == -1)
1208 *widthp
= *heightp
= 0;
1211 *widthp
= size
.ws_col
;
1212 *heightp
= size
.ws_row
;
1215 #elif defined TIOCGSIZE
1217 /* SunOS - style. */
1218 struct ttysize size
;
1220 if (ioctl (fd
, TIOCGSIZE
, &size
) == -1)
1221 *widthp
= *heightp
= 0;
1224 *widthp
= size
.ts_cols
;
1225 *heightp
= size
.ts_lines
;
1228 #elif defined WINDOWSNT
1230 CONSOLE_SCREEN_BUFFER_INFO info
;
1231 if (GetConsoleScreenBufferInfo (GetStdHandle (STD_OUTPUT_HANDLE
), &info
))
1233 *widthp
= info
.srWindow
.Right
- info
.srWindow
.Left
+ 1;
1234 *heightp
= info
.srWindow
.Bottom
- info
.srWindow
.Top
+ 1;
1237 *widthp
= *heightp
= 0;
1241 *widthp
= ScreenCols ();
1242 *heightp
= ScreenRows ();
1244 #else /* system doesn't know size */
1252 /* Set the logical window size associated with descriptor FD
1253 to HEIGHT and WIDTH. This is used mainly with ptys.
1254 Return a negative value on failure. */
1257 set_window_size (int fd
, int height
, int width
)
1262 struct winsize size
;
1263 size
.ws_row
= height
;
1264 size
.ws_col
= width
;
1266 return ioctl (fd
, TIOCSWINSZ
, &size
);
1271 /* SunOS - style. */
1272 struct ttysize size
;
1273 size
.ts_lines
= height
;
1274 size
.ts_cols
= width
;
1276 return ioctl (fd
, TIOCGSIZE
, &size
);
1279 #endif /* not SunOS-style */
1280 #endif /* not BSD-style */
1285 /* Prepare all terminal devices for exiting Emacs. */
1288 reset_all_sys_modes (void)
1290 struct tty_display_info
*tty
;
1291 for (tty
= tty_list
; tty
; tty
= tty
->next
)
1292 reset_sys_modes (tty
);
1295 /* Prepare the terminal for closing it; move the cursor to the
1296 bottom of the frame, turn off interrupt-driven I/O, etc. */
1299 reset_sys_modes (struct tty_display_info
*tty_out
)
1306 if (!tty_out
->term_initted
)
1309 if (!tty_out
->output
)
1310 return; /* The tty is suspended. */
1312 /* Go to and clear the last line of the terminal. */
1314 cmgoto (tty_out
, FrameRows (tty_out
) - 1, 0);
1316 /* Code adapted from tty_clear_end_of_line. */
1317 if (tty_out
->TS_clr_line
)
1319 emacs_tputs (tty_out
, tty_out
->TS_clr_line
, 1, cmputc
);
1322 { /* have to do it the hard way */
1324 tty_turn_off_insert (tty_out
);
1326 for (i
= cursorX (tty_out
); i
< FrameCols (tty_out
) - 1; i
++)
1328 fputc (' ', tty_out
->output
);
1332 cmgoto (tty_out
, FrameRows (tty_out
) - 1, 0);
1333 fflush (tty_out
->output
);
1335 if (tty_out
->terminal
->reset_terminal_modes_hook
)
1336 tty_out
->terminal
->reset_terminal_modes_hook (tty_out
->terminal
);
1338 /* Avoid possible loss of output when changing terminal modes. */
1339 while (fdatasync (fileno (tty_out
->output
)) != 0 && errno
== EINTR
)
1344 if (interrupt_input
)
1346 reset_sigio (fileno (tty_out
->input
));
1347 fcntl (fileno (tty_out
->input
), F_SETOWN
,
1348 old_fcntl_owner
[fileno (tty_out
->input
)]);
1350 #endif /* F_SETOWN */
1351 fcntl (fileno (tty_out
->input
), F_SETFL
,
1352 fcntl (fileno (tty_out
->input
), F_GETFL
, 0) & ~O_NONBLOCK
);
1355 if (tty_out
->old_tty
)
1356 while (emacs_set_tty (fileno (tty_out
->input
),
1357 tty_out
->old_tty
, 0) < 0 && errno
== EINTR
)
1360 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */
1364 widen_foreground_group (fileno (tty_out
->input
));
1369 /* Set up the proper status flags for use of a pty. */
1374 /* I'm told that TOICREMOTE does not mean control chars
1375 "can't be sent" but rather that they don't have
1376 input-editing or signaling effects.
1377 That should be good, because we have other ways
1378 to do those things in Emacs.
1379 However, telnet mode seems not to work on 4.2.
1380 So TIOCREMOTE is turned off now. */
1382 /* Under hp-ux, if TIOCREMOTE is turned on, some calls
1383 will hang. In particular, the "timeout" feature (which
1384 causes a read to return if there is no data available)
1385 does this. Also it is known that telnet mode will hang
1386 in such a way that Emacs must be stopped (perhaps this
1387 is the same problem).
1389 If TIOCREMOTE is turned off, then there is a bug in
1390 hp-ux which sometimes loses data. Apparently the
1391 code which blocks the master process when the internal
1392 buffer fills up does not work. Other than this,
1393 though, everything else seems to work fine.
1395 Since the latter lossage is more benign, we may as well
1396 lose that way. -- cph */
1398 #if defined (UNIX98_PTYS)
1401 ioctl (fd
, FIONBIO
, &on
);
1406 #endif /* HAVE_PTYS */
1409 init_system_name (void)
1413 /* Set system-name to nil so that the build is deterministic. */
1414 Vsystem_name
= Qnil
;
1417 char *hostname_alloc
= NULL
;
1419 #ifndef HAVE_GETHOSTNAME
1422 hostname
= uts
.nodename
;
1423 #else /* HAVE_GETHOSTNAME */
1424 char hostname_buf
[256];
1425 ptrdiff_t hostname_size
= sizeof hostname_buf
;
1426 hostname
= hostname_buf
;
1428 /* Try to get the host name; if the buffer is too short, try
1429 again. Apparently, the only indication gethostname gives of
1430 whether the buffer was large enough is the presence or absence
1431 of a '\0' in the string. Eech. */
1434 gethostname (hostname
, hostname_size
- 1);
1435 hostname
[hostname_size
- 1] = '\0';
1437 /* Was the buffer large enough for the '\0'? */
1438 if (strlen (hostname
) < hostname_size
- 1)
1441 hostname
= hostname_alloc
= xpalloc (hostname_alloc
, &hostname_size
, 1,
1442 min (PTRDIFF_MAX
, SIZE_MAX
), 1);
1444 #endif /* HAVE_GETHOSTNAME */
1446 for (p
= hostname
; *p
; p
++)
1447 if (*p
== ' ' || *p
== '\t')
1449 if (! (STRINGP (Vsystem_name
) && SBYTES (Vsystem_name
) == p
- hostname
1450 && strcmp (SSDATA (Vsystem_name
), hostname
) == 0))
1451 Vsystem_name
= build_string (hostname
);
1452 xfree (hostname_alloc
);
1455 sigset_t empty_mask
;
1457 static struct sigaction process_fatal_action
;
1460 emacs_sigaction_flags (void)
1463 /* SA_RESTART causes interruptible functions with timeouts (e.g.,
1464 'select') to reset their timeout on some platforms (e.g.,
1465 HP-UX 11), which is not what we want. Also, when Emacs is
1466 interactive, we don't want SA_RESTART because we need to poll
1467 for pending input so we need long-running syscalls to be interrupted
1468 after a signal that sets pending_signals.
1470 Non-interactive keyboard input goes through stdio, where we
1471 always want restartable system calls. */
1478 /* Store into *ACTION a signal action suitable for Emacs, with handler
1481 emacs_sigaction_init (struct sigaction
*action
, signal_handler_t handler
)
1483 sigemptyset (&action
->sa_mask
);
1485 /* When handling a signal, block nonfatal system signals that are caught
1486 by Emacs. This makes race conditions less likely. */
1487 sigaddset (&action
->sa_mask
, SIGALRM
);
1489 sigaddset (&action
->sa_mask
, SIGCHLD
);
1492 sigaddset (&action
->sa_mask
, SIGDANGER
);
1494 #ifdef PROFILER_CPU_SUPPORT
1495 sigaddset (&action
->sa_mask
, SIGPROF
);
1498 sigaddset (&action
->sa_mask
, SIGWINCH
);
1500 if (! noninteractive
)
1502 sigaddset (&action
->sa_mask
, SIGINT
);
1503 sigaddset (&action
->sa_mask
, SIGQUIT
);
1505 sigaddset (&action
->sa_mask
, SIGIO
);
1509 action
->sa_handler
= handler
;
1510 action
->sa_flags
= emacs_sigaction_flags ();
1513 #ifdef FORWARD_SIGNAL_TO_MAIN_THREAD
1514 static pthread_t main_thread
;
1517 /* SIG has arrived at the current process. Deliver it to the main
1518 thread, which should handle it with HANDLER.
1520 If we are on the main thread, handle the signal SIG with HANDLER.
1521 Otherwise, redirect the signal to the main thread, blocking it from
1522 this thread. POSIX says any thread can receive a signal that is
1523 associated with a process, process group, or asynchronous event.
1524 On GNU/Linux that is not true, but for other systems (FreeBSD at
1527 deliver_process_signal (int sig
, signal_handler_t handler
)
1529 /* Preserve errno, to avoid race conditions with signal handlers that
1530 might change errno. Races can occur even in single-threaded hosts. */
1531 int old_errno
= errno
;
1533 bool on_main_thread
= true;
1534 #ifdef FORWARD_SIGNAL_TO_MAIN_THREAD
1535 if (! pthread_equal (pthread_self (), main_thread
))
1538 sigemptyset (&blocked
);
1539 sigaddset (&blocked
, sig
);
1540 pthread_sigmask (SIG_BLOCK
, &blocked
, 0);
1541 pthread_kill (main_thread
, sig
);
1542 on_main_thread
= false;
1551 /* Static location to save a fatal backtrace in a thread.
1552 FIXME: If two subsidiary threads fail simultaneously, the resulting
1553 backtrace may be garbage. */
1554 enum { BACKTRACE_LIMIT_MAX
= 500 };
1555 static void *thread_backtrace_buffer
[BACKTRACE_LIMIT_MAX
+ 1];
1556 static int thread_backtrace_npointers
;
1558 /* SIG has arrived at the current thread.
1559 If we are on the main thread, handle the signal SIG with HANDLER.
1560 Otherwise, this is a fatal error in the handling thread. */
1562 deliver_thread_signal (int sig
, signal_handler_t handler
)
1564 int old_errno
= errno
;
1566 #ifdef FORWARD_SIGNAL_TO_MAIN_THREAD
1567 if (! pthread_equal (pthread_self (), main_thread
))
1569 thread_backtrace_npointers
1570 = backtrace (thread_backtrace_buffer
, BACKTRACE_LIMIT_MAX
);
1571 sigaction (sig
, &process_fatal_action
, 0);
1572 pthread_kill (main_thread
, sig
);
1574 /* Avoid further damage while the main thread is exiting. */
1576 sigsuspend (&empty_mask
);
1584 #if !HAVE_DECL_SYS_SIGLIST
1586 # ifdef _sys_siglist
1587 # define sys_siglist _sys_siglist
1588 # elif HAVE_DECL___SYS_SIGLIST
1589 # define sys_siglist __sys_siglist
1591 # define sys_siglist my_sys_siglist
1592 static char const *sys_siglist
[NSIG
];
1597 # define sys_siglist_entries _sys_nsig
1599 # define sys_siglist_entries NSIG
1602 /* Handle bus errors, invalid instruction, etc. */
1604 handle_fatal_signal (int sig
)
1606 terminate_due_to_signal (sig
, 40);
1610 deliver_fatal_signal (int sig
)
1612 deliver_process_signal (sig
, handle_fatal_signal
);
1616 deliver_fatal_thread_signal (int sig
)
1618 deliver_thread_signal (sig
, handle_fatal_signal
);
1621 static _Noreturn
void
1622 handle_arith_signal (int sig
)
1624 pthread_sigmask (SIG_SETMASK
, &empty_mask
, 0);
1625 xsignal0 (Qarith_error
);
1628 #if defined HAVE_STACK_OVERFLOW_HANDLING && !defined WINDOWSNT
1630 /* Alternate stack used by SIGSEGV handler below. */
1632 static unsigned char sigsegv_stack
[SIGSTKSZ
];
1635 /* Return true if SIGINFO indicates a stack overflow. */
1638 stack_overflow (siginfo_t
*siginfo
)
1640 if (!attempt_stack_overflow_recovery
)
1643 /* In theory, a more-accurate heuristic can be obtained by using
1644 GNU/Linux pthread_getattr_np along with POSIX pthread_attr_getstack
1645 and pthread_attr_getguardsize to find the location and size of the
1646 guard area. In practice, though, these functions are so hard to
1647 use reliably that they're not worth bothering with. E.g., see:
1648 https://sourceware.org/bugzilla/show_bug.cgi?id=16291
1649 Other operating systems also have problems, e.g., Solaris's
1650 stack_violation function is tailor-made for this problem, but it
1651 doesn't work on Solaris 11.2 x86-64 with a 32-bit executable.
1653 GNU libsigsegv is overkill for Emacs; otherwise it might be a
1659 /* The faulting address. */
1660 char *addr
= siginfo
->si_addr
;
1664 /* The known top and bottom of the stack. The actual stack may
1665 extend a bit beyond these boundaries. */
1666 char *bot
= stack_bottom
;
1667 char *top
= near_C_stack_top ();
1669 /* Log base 2 of the stack heuristic ratio. This ratio is the size
1670 of the known stack divided by the size of the guard area past the
1671 end of the stack top. The heuristic is that a bad address is
1672 considered to be a stack overflow if it occurs within
1673 stacksize>>LG_STACK_HEURISTIC bytes above the top of the known
1674 stack. This heuristic is not exactly correct but it's good
1675 enough in practice. */
1676 enum { LG_STACK_HEURISTIC
= 8 };
1679 return 0 <= addr
- top
&& addr
- top
< (top
- bot
) >> LG_STACK_HEURISTIC
;
1681 return 0 <= top
- addr
&& top
- addr
< (bot
- top
) >> LG_STACK_HEURISTIC
;
1685 /* Attempt to recover from SIGSEGV caused by C stack overflow. */
1688 handle_sigsegv (int sig
, siginfo_t
*siginfo
, void *arg
)
1690 /* Hard GC error may lead to stack overflow caused by
1691 too nested calls to mark_object. No way to survive. */
1692 bool fatal
= gc_in_progress
;
1694 #ifdef FORWARD_SIGNAL_TO_MAIN_THREAD
1695 if (!fatal
&& !pthread_equal (pthread_self (), main_thread
))
1699 if (!fatal
&& stack_overflow (siginfo
))
1700 siglongjmp (return_to_command_loop
, 1);
1702 /* Otherwise we can't do anything with this. */
1703 deliver_fatal_thread_signal (sig
);
1706 /* Return true if we have successfully set up SIGSEGV handler on alternate
1707 stack. Otherwise we just treat SIGSEGV among the rest of fatal signals. */
1712 struct sigaction sa
;
1715 ss
.ss_sp
= sigsegv_stack
;
1716 ss
.ss_size
= sizeof (sigsegv_stack
);
1718 if (sigaltstack (&ss
, NULL
) < 0)
1721 sigfillset (&sa
.sa_mask
);
1722 sa
.sa_sigaction
= handle_sigsegv
;
1723 sa
.sa_flags
= SA_SIGINFO
| SA_ONSTACK
| emacs_sigaction_flags ();
1724 return sigaction (SIGSEGV
, &sa
, NULL
) < 0 ? 0 : 1;
1727 #else /* not HAVE_STACK_OVERFLOW_HANDLING or WINDOWSNT */
1735 #endif /* HAVE_STACK_OVERFLOW_HANDLING && !WINDOWSNT */
1738 deliver_arith_signal (int sig
)
1740 deliver_thread_signal (sig
, handle_arith_signal
);
1745 /* Handler for SIGDANGER. */
1747 handle_danger_signal (int sig
)
1749 malloc_warning ("Operating system warns that virtual memory is running low.\n");
1751 /* It might be unsafe to call do_auto_save now. */
1752 force_auto_save_soon ();
1756 deliver_danger_signal (int sig
)
1758 deliver_process_signal (sig
, handle_danger_signal
);
1762 /* Treat SIG as a terminating signal, unless it is already ignored and
1763 we are in --batch mode. Among other things, this makes nohup work. */
1765 maybe_fatal_sig (int sig
)
1767 bool catch_sig
= !noninteractive
;
1770 struct sigaction old_action
;
1771 sigaction (sig
, 0, &old_action
);
1772 catch_sig
= old_action
.sa_handler
!= SIG_IGN
;
1775 sigaction (sig
, &process_fatal_action
, 0);
1779 init_signals (bool dumping
)
1781 struct sigaction thread_fatal_action
;
1782 struct sigaction action
;
1784 sigemptyset (&empty_mask
);
1786 #ifdef FORWARD_SIGNAL_TO_MAIN_THREAD
1787 main_thread
= pthread_self ();
1790 #if !HAVE_DECL_SYS_SIGLIST && !defined _sys_siglist
1793 sys_siglist
[SIGABRT
] = "Aborted";
1795 sys_siglist
[SIGAIO
] = "LAN I/O interrupt";
1797 sys_siglist
[SIGALRM
] = "Alarm clock";
1799 sys_siglist
[SIGBUS
] = "Bus error";
1802 sys_siglist
[SIGCHLD
] = "Child status changed";
1805 sys_siglist
[SIGCONT
] = "Continued";
1808 sys_siglist
[SIGDANGER
] = "Swap space dangerously low";
1811 sys_siglist
[SIGDGNOTIFY
] = "Notification message in queue";
1814 sys_siglist
[SIGEMT
] = "Emulation trap";
1816 sys_siglist
[SIGFPE
] = "Arithmetic exception";
1818 sys_siglist
[SIGFREEZE
] = "SIGFREEZE";
1821 sys_siglist
[SIGGRANT
] = "Monitor mode granted";
1823 sys_siglist
[SIGHUP
] = "Hangup";
1824 sys_siglist
[SIGILL
] = "Illegal instruction";
1825 sys_siglist
[SIGINT
] = "Interrupt";
1827 sys_siglist
[SIGIO
] = "I/O possible";
1830 sys_siglist
[SIGIOINT
] = "I/O intervention required";
1833 sys_siglist
[SIGIOT
] = "IOT trap";
1835 sys_siglist
[SIGKILL
] = "Killed";
1837 sys_siglist
[SIGLOST
] = "Resource lost";
1840 sys_siglist
[SIGLWP
] = "SIGLWP";
1843 sys_siglist
[SIGMSG
] = "Monitor mode data available";
1846 sys_siglist
[SIGWIND
] = "SIGPHONE";
1848 sys_siglist
[SIGPIPE
] = "Broken pipe";
1850 sys_siglist
[SIGPOLL
] = "Pollable event occurred";
1853 sys_siglist
[SIGPROF
] = "Profiling timer expired";
1856 sys_siglist
[SIGPTY
] = "PTY I/O interrupt";
1859 sys_siglist
[SIGPWR
] = "Power-fail restart";
1861 sys_siglist
[SIGQUIT
] = "Quit";
1863 sys_siglist
[SIGRETRACT
] = "Need to relinquish monitor mode";
1866 sys_siglist
[SIGSAK
] = "Secure attention";
1868 sys_siglist
[SIGSEGV
] = "Segmentation violation";
1870 sys_siglist
[SIGSOUND
] = "Sound completed";
1873 sys_siglist
[SIGSTOP
] = "Stopped (signal)";
1876 sys_siglist
[SIGSTP
] = "Stopped (user)";
1879 sys_siglist
[SIGSYS
] = "Bad argument to system call";
1881 sys_siglist
[SIGTERM
] = "Terminated";
1883 sys_siglist
[SIGTHAW
] = "SIGTHAW";
1886 sys_siglist
[SIGTRAP
] = "Trace/breakpoint trap";
1889 sys_siglist
[SIGTSTP
] = "Stopped (user)";
1892 sys_siglist
[SIGTTIN
] = "Stopped (tty input)";
1895 sys_siglist
[SIGTTOU
] = "Stopped (tty output)";
1898 sys_siglist
[SIGURG
] = "Urgent I/O condition";
1901 sys_siglist
[SIGUSR1
] = "User defined signal 1";
1904 sys_siglist
[SIGUSR2
] = "User defined signal 2";
1907 sys_siglist
[SIGVTALRM
] = "Virtual timer expired";
1910 sys_siglist
[SIGWAITING
] = "Process's LWPs are blocked";
1913 sys_siglist
[SIGWINCH
] = "Window size changed";
1916 sys_siglist
[SIGWIND
] = "SIGWIND";
1919 sys_siglist
[SIGXCPU
] = "CPU time limit exceeded";
1922 sys_siglist
[SIGXFSZ
] = "File size limit exceeded";
1925 #endif /* !HAVE_DECL_SYS_SIGLIST && !_sys_siglist */
1927 /* Don't alter signal handlers if dumping. On some machines,
1928 changing signal handlers sets static data that would make signals
1929 fail to work right when the dumped Emacs is run. */
1933 sigfillset (&process_fatal_action
.sa_mask
);
1934 process_fatal_action
.sa_handler
= deliver_fatal_signal
;
1935 process_fatal_action
.sa_flags
= emacs_sigaction_flags ();
1937 sigfillset (&thread_fatal_action
.sa_mask
);
1938 thread_fatal_action
.sa_handler
= deliver_fatal_thread_signal
;
1939 thread_fatal_action
.sa_flags
= process_fatal_action
.sa_flags
;
1941 /* SIGINT may need special treatment on MS-Windows. See
1942 http://lists.gnu.org/archive/html/emacs-devel/2010-09/msg01062.html
1943 Please update the doc of kill-emacs, kill-emacs-hook, and
1944 NEWS if you change this. */
1946 maybe_fatal_sig (SIGHUP
);
1947 maybe_fatal_sig (SIGINT
);
1948 maybe_fatal_sig (SIGTERM
);
1950 /* Emacs checks for write errors, so it can safely ignore SIGPIPE.
1951 However, in batch mode leave SIGPIPE alone, as that causes Emacs
1952 to behave more like typical batch applications do. */
1953 if (! noninteractive
)
1954 signal (SIGPIPE
, SIG_IGN
);
1956 sigaction (SIGQUIT
, &process_fatal_action
, 0);
1957 sigaction (SIGILL
, &thread_fatal_action
, 0);
1958 sigaction (SIGTRAP
, &thread_fatal_action
, 0);
1960 /* Typically SIGFPE is thread-specific and is fatal, like SIGILL.
1961 But on a non-IEEE host SIGFPE can come from a trap in the Lisp
1962 interpreter's floating point operations, so treat SIGFPE as an
1963 arith-error if it arises in the main thread. */
1964 if (IEEE_FLOATING_POINT
)
1965 sigaction (SIGFPE
, &thread_fatal_action
, 0);
1968 emacs_sigaction_init (&action
, deliver_arith_signal
);
1969 sigaction (SIGFPE
, &action
, 0);
1973 add_user_signal (SIGUSR1
, "sigusr1");
1976 add_user_signal (SIGUSR2
, "sigusr2");
1978 sigaction (SIGABRT
, &thread_fatal_action
, 0);
1980 sigaction (SIGPRE
, &thread_fatal_action
, 0);
1983 sigaction (SIGORE
, &thread_fatal_action
, 0);
1986 sigaction (SIGUME
, &thread_fatal_action
, 0);
1989 sigaction (SIGDLK
, &process_fatal_action
, 0);
1992 sigaction (SIGCPULIM
, &process_fatal_action
, 0);
1995 sigaction (SIGIOT
, &thread_fatal_action
, 0);
1998 sigaction (SIGEMT
, &thread_fatal_action
, 0);
2001 sigaction (SIGBUS
, &thread_fatal_action
, 0);
2003 if (!init_sigsegv ())
2004 sigaction (SIGSEGV
, &thread_fatal_action
, 0);
2006 sigaction (SIGSYS
, &thread_fatal_action
, 0);
2008 sigaction (SIGTERM
, &process_fatal_action
, 0);
2010 signal (SIGPROF
, SIG_IGN
);
2013 sigaction (SIGVTALRM
, &process_fatal_action
, 0);
2016 sigaction (SIGXCPU
, &process_fatal_action
, 0);
2019 sigaction (SIGXFSZ
, &process_fatal_action
, 0);
2023 /* This just means available memory is getting low. */
2024 emacs_sigaction_init (&action
, deliver_danger_signal
);
2025 sigaction (SIGDANGER
, &action
, 0);
2028 /* AIX-specific signals. */
2030 sigaction (SIGGRANT
, &process_fatal_action
, 0);
2033 sigaction (SIGMIGRATE
, &process_fatal_action
, 0);
2036 sigaction (SIGMSG
, &process_fatal_action
, 0);
2039 sigaction (SIGRETRACT
, &process_fatal_action
, 0);
2042 sigaction (SIGSAK
, &process_fatal_action
, 0);
2045 sigaction (SIGSOUND
, &process_fatal_action
, 0);
2048 sigaction (SIGTALRM
, &thread_fatal_action
, 0);
2058 /* Figure out how many bits the system's random number generator uses.
2059 `random' and `lrand48' are assumed to return 31 usable bits.
2060 BSD `rand' returns a 31 bit value but the low order bits are unusable;
2061 so we'll shift it and treat it like the 15-bit USG `rand'. */
2065 # define RAND_BITS 31
2066 # else /* !HAVE_RANDOM */
2067 # ifdef HAVE_LRAND48
2068 # define RAND_BITS 31
2069 # define random lrand48
2070 # else /* !HAVE_LRAND48 */
2071 # define RAND_BITS 15
2072 # if RAND_MAX == 32767
2073 # define random rand
2074 # else /* RAND_MAX != 32767 */
2075 # if RAND_MAX == 2147483647
2076 # define random() (rand () >> 16)
2077 # else /* RAND_MAX != 2147483647 */
2079 # define random rand
2081 # define random() (rand () >> 16)
2083 # endif /* RAND_MAX != 2147483647 */
2084 # endif /* RAND_MAX != 32767 */
2085 # endif /* !HAVE_LRAND48 */
2086 # endif /* !HAVE_RANDOM */
2087 #endif /* !RAND_BITS */
2090 typedef unsigned int random_seed
;
2091 static void set_random_seed (random_seed arg
) { srandom (arg
); }
2092 #elif defined HAVE_LRAND48
2093 /* Although srand48 uses a long seed, this is unsigned long to avoid
2094 undefined behavior on signed integer overflow in init_random. */
2095 typedef unsigned long int random_seed
;
2096 static void set_random_seed (random_seed arg
) { srand48 (arg
); }
2098 typedef unsigned int random_seed
;
2099 static void set_random_seed (random_seed arg
) { srand (arg
); }
2103 seed_random (void *seed
, ptrdiff_t seed_size
)
2105 random_seed arg
= 0;
2106 unsigned char *argp
= (unsigned char *) &arg
;
2107 unsigned char *seedp
= seed
;
2108 for (ptrdiff_t i
= 0; i
< seed_size
; i
++)
2109 argp
[i
% sizeof arg
] ^= seedp
[i
];
2110 set_random_seed (arg
);
2117 if (! (EQ (emacs_gnutls_global_init (), Qt
)
2118 && gnutls_rnd (GNUTLS_RND_NONCE
, &v
, sizeof v
) == 0))
2120 bool success
= false;
2122 int fd
= emacs_open ("/dev/urandom", O_RDONLY
| O_BINARY
, 0);
2125 success
= emacs_read (fd
, &v
, sizeof v
) == sizeof v
;
2129 success
= w32_init_random (&v
, sizeof v
) == 0;
2133 /* Fall back to current time value + PID. */
2134 struct timespec t
= current_timespec ();
2135 v
= getpid () ^ t
.tv_sec
^ t
.tv_nsec
;
2138 set_random_seed (v
);
2142 * Return a nonnegative random integer out of whatever we've got.
2143 * It contains enough bits to make a random (signed) Emacs fixnum.
2144 * This suffices even for a 64-bit architecture with a 15-bit rand.
2151 for (i
= 0; i
< (FIXNUM_BITS
+ RAND_BITS
- 1) / RAND_BITS
; i
++)
2152 val
= (random () ^ (val
<< RAND_BITS
)
2153 ^ (val
>> (BITS_PER_EMACS_INT
- RAND_BITS
)));
2154 val
^= val
>> (BITS_PER_EMACS_INT
- FIXNUM_BITS
);
2155 return val
& INTMASK
;
2158 #ifndef HAVE_SNPRINTF
2159 /* Approximate snprintf as best we can on ancient hosts that lack it. */
2161 snprintf (char *buf
, size_t bufsize
, char const *format
, ...)
2163 ptrdiff_t size
= min (bufsize
, PTRDIFF_MAX
);
2164 ptrdiff_t nbytes
= size
- 1;
2169 va_start (ap
, format
);
2170 nbytes
= doprnt (buf
, size
, format
, 0, ap
);
2174 if (nbytes
== size
- 1)
2176 /* Calculate the length of the string that would have been created
2177 had the buffer been large enough. */
2178 char stackbuf
[4000];
2180 ptrdiff_t bsize
= sizeof stackbuf
;
2181 va_start (ap
, format
);
2182 nbytes
= evxprintf (&b
, &bsize
, stackbuf
, -1, format
, ap
);
2188 if (INT_MAX
< nbytes
)
2201 /* If a backtrace is available, output the top lines of it to stderr.
2202 Do not output more than BACKTRACE_LIMIT or BACKTRACE_LIMIT_MAX lines.
2203 This function may be called from a signal handler, so it should
2204 not invoke async-unsafe functions like malloc.
2206 If BACKTRACE_LIMIT is -1, initialize tables that 'backtrace' uses
2207 but do not output anything. This avoids some problems that can
2208 otherwise occur if the malloc arena is corrupted before 'backtrace'
2209 is called, since 'backtrace' may call malloc if the tables are not
2212 If the static variable THREAD_BACKTRACE_NPOINTERS is nonzero, a
2213 fatal error has occurred in some other thread; generate a thread
2214 backtrace instead, ignoring BACKTRACE_LIMIT. */
2216 emacs_backtrace (int backtrace_limit
)
2218 void *main_backtrace_buffer
[BACKTRACE_LIMIT_MAX
+ 1];
2219 int bounded_limit
= min (backtrace_limit
, BACKTRACE_LIMIT_MAX
);
2223 if (thread_backtrace_npointers
)
2225 buffer
= thread_backtrace_buffer
;
2226 npointers
= thread_backtrace_npointers
;
2230 buffer
= main_backtrace_buffer
;
2232 /* Work around 'backtrace' bug; see Bug#19959 and glibc bug#18084. */
2233 if (bounded_limit
< 0)
2235 backtrace (buffer
, 1);
2239 npointers
= backtrace (buffer
, bounded_limit
+ 1);
2244 emacs_write (STDERR_FILENO
, "\nBacktrace:\n", 12);
2245 backtrace_symbols_fd (buffer
, npointers
, STDERR_FILENO
);
2246 if (bounded_limit
< npointers
)
2247 emacs_write (STDERR_FILENO
, "...\n", 4);
2255 terminate_due_to_signal (SIGABRT
, 40);
2259 /* Open FILE for Emacs use, using open flags OFLAG and mode MODE.
2260 Use binary I/O on systems that care about text vs binary I/O.
2261 Arrange for subprograms to not inherit the file descriptor.
2262 Prefer a method that is multithread-safe, if available.
2263 Do not fail merely because the open was interrupted by a signal.
2264 Allow the user to quit. */
2267 emacs_open (const char *file
, int oflags
, int mode
)
2270 if (! (oflags
& O_TEXT
))
2272 oflags
|= O_CLOEXEC
;
2273 while ((fd
= open (file
, oflags
, mode
)) < 0 && errno
== EINTR
)
2275 if (! O_CLOEXEC
&& 0 <= fd
)
2276 fcntl (fd
, F_SETFD
, FD_CLOEXEC
);
2280 /* Open FILE as a stream for Emacs use, with mode MODE.
2281 Act like emacs_open with respect to threads, signals, and quits. */
2284 emacs_fopen (char const *file
, char const *mode
)
2286 int fd
, omode
, oflags
;
2288 char const *m
= mode
;
2292 case 'r': omode
= O_RDONLY
; oflags
= 0; break;
2293 case 'w': omode
= O_WRONLY
; oflags
= O_CREAT
| O_TRUNC
; break;
2294 case 'a': omode
= O_WRONLY
; oflags
= O_CREAT
| O_APPEND
; break;
2295 default: emacs_abort ();
2301 case '+': omode
= O_RDWR
; break;
2302 case 'b': bflag
= O_BINARY
; break;
2303 case 't': bflag
= O_TEXT
; break;
2304 default: /* Ignore. */ break;
2307 fd
= emacs_open (file
, omode
| oflags
| bflag
, 0666);
2308 return fd
< 0 ? 0 : fdopen (fd
, mode
);
2311 /* Create a pipe for Emacs use. */
2314 emacs_pipe (int fd
[2])
2319 int result
= pipe2 (fd
, O_BINARY
| O_CLOEXEC
);
2320 if (! O_CLOEXEC
&& result
== 0)
2322 fcntl (fd
[0], F_SETFD
, FD_CLOEXEC
);
2323 fcntl (fd
[1], F_SETFD
, FD_CLOEXEC
);
2329 /* Approximate posix_close and POSIX_CLOSE_RESTART well enough for Emacs.
2330 For the background behind this mess, please see Austin Group defect 529
2331 <http://austingroupbugs.net/view.php?id=529>. */
2333 #ifndef POSIX_CLOSE_RESTART
2334 # define POSIX_CLOSE_RESTART 1
2336 posix_close (int fd
, int flag
)
2338 /* Only the POSIX_CLOSE_RESTART case is emulated. */
2339 eassert (flag
== POSIX_CLOSE_RESTART
);
2341 /* Things are tricky if close (fd) returns -1 with errno == EINTR
2342 on a system that does not define POSIX_CLOSE_RESTART.
2344 In this case, in some systems (e.g., GNU/Linux, AIX) FD is
2345 closed, and retrying the close could inadvertently close a file
2346 descriptor allocated by some other thread. In other systems
2347 (e.g., HP/UX) FD is not closed. And in still other systems
2348 (e.g., OS X, Solaris), maybe FD is closed, maybe not, and in a
2349 multithreaded program there can be no way to tell.
2351 So, in this case, pretend that the close succeeded. This works
2352 well on systems like GNU/Linux that close FD. Although it may
2353 leak a file descriptor on other systems, the leak is unlikely and
2354 it's better to leak than to close a random victim. */
2355 return close (fd
) == 0 || errno
== EINTR
? 0 : -1;
2359 /* Close FD, retrying if interrupted. If successful, return 0;
2360 otherwise, return -1 and set errno to a non-EINTR value. Consider
2361 an EINPROGRESS error to be successful, as that's merely a signal
2362 arriving. FD is always closed when this function returns, even
2365 Do not call this function if FD is nonnegative and might already be closed,
2366 as that might close an innocent victim opened by some other thread. */
2369 emacs_close (int fd
)
2373 int r
= posix_close (fd
, POSIX_CLOSE_RESTART
);
2376 if (!POSIX_CLOSE_RESTART
|| errno
!= EINTR
)
2378 eassert (errno
!= EBADF
|| fd
< 0);
2379 return errno
== EINPROGRESS
? 0 : r
;
2384 /* Maximum number of bytes to read or write in a single system call.
2385 This works around a serious bug in Linux kernels before 2.6.16; see
2386 <https://bugzilla.redhat.com/show_bug.cgi?format=multiple&id=612839>.
2387 It's likely to work around similar bugs in other operating systems, so do it
2388 on all platforms. Round INT_MAX down to a page size, with the conservative
2389 assumption that page sizes are at most 2**18 bytes (any kernel with a
2390 page size larger than that shouldn't have the bug). */
2391 #ifndef MAX_RW_COUNT
2392 #define MAX_RW_COUNT (INT_MAX >> 18 << 18)
2395 /* Read from FILEDESC to a buffer BUF with size NBYTE, retrying if interrupted.
2396 Return the number of bytes read, which might be less than NBYTE.
2397 On error, set errno and return -1. */
2399 emacs_read (int fildes
, void *buf
, ptrdiff_t nbyte
)
2403 /* There is no need to check against MAX_RW_COUNT, since no caller ever
2404 passes a size that large to emacs_read. */
2406 while ((rtnval
= read (fildes
, buf
, nbyte
)) == -1
2407 && (errno
== EINTR
))
2412 /* Write to FILEDES from a buffer BUF with size NBYTE, retrying if interrupted
2413 or if a partial write occurs. If interrupted, process pending
2414 signals if PROCESS SIGNALS. Return the number of bytes written, setting
2415 errno if this is less than NBYTE. */
2417 emacs_full_write (int fildes
, char const *buf
, ptrdiff_t nbyte
,
2418 bool process_signals
)
2420 ptrdiff_t bytes_written
= 0;
2424 ssize_t n
= write (fildes
, buf
, min (nbyte
, MAX_RW_COUNT
));
2430 /* I originally used `QUIT' but that might cause files to
2431 be truncated if you hit C-g in the middle of it. --Stef */
2432 if (process_signals
&& pending_signals
)
2433 process_pending_signals ();
2445 return bytes_written
;
2448 /* Write to FILEDES from a buffer BUF with size NBYTE, retrying if
2449 interrupted or if a partial write occurs. Return the number of
2450 bytes written, setting errno if this is less than NBYTE. */
2452 emacs_write (int fildes
, void const *buf
, ptrdiff_t nbyte
)
2454 return emacs_full_write (fildes
, buf
, nbyte
, 0);
2457 /* Like emacs_write, but also process pending signals if interrupted. */
2459 emacs_write_sig (int fildes
, void const *buf
, ptrdiff_t nbyte
)
2461 return emacs_full_write (fildes
, buf
, nbyte
, 1);
2464 /* Write a diagnostic to standard error that contains MESSAGE and a
2465 string derived from errno. Preserve errno. Do not buffer stderr.
2466 Do not process pending signals if interrupted. */
2468 emacs_perror (char const *message
)
2471 char const *error_string
= strerror (err
);
2472 char const *command
= (initial_argv
&& initial_argv
[0]
2473 ? initial_argv
[0] : "emacs");
2474 /* Write it out all at once, if it's short; this is less likely to
2475 be interleaved with other output. */
2477 int nbytes
= snprintf (buf
, sizeof buf
, "%s: %s: %s\n",
2478 command
, message
, error_string
);
2479 if (0 <= nbytes
&& nbytes
< BUFSIZ
)
2480 emacs_write (STDERR_FILENO
, buf
, nbytes
);
2483 emacs_write (STDERR_FILENO
, command
, strlen (command
));
2484 emacs_write (STDERR_FILENO
, ": ", 2);
2485 emacs_write (STDERR_FILENO
, message
, strlen (message
));
2486 emacs_write (STDERR_FILENO
, ": ", 2);
2487 emacs_write (STDERR_FILENO
, error_string
, strlen (error_string
));
2488 emacs_write (STDERR_FILENO
, "\n", 1);
2493 /* Return a struct timeval that is roughly equivalent to T.
2494 Use the least timeval not less than T.
2495 Return an extremal value if the result would overflow. */
2497 make_timeval (struct timespec t
)
2500 tv
.tv_sec
= t
.tv_sec
;
2501 tv
.tv_usec
= t
.tv_nsec
/ 1000;
2503 if (t
.tv_nsec
% 1000 != 0)
2505 if (tv
.tv_usec
< 999999)
2507 else if (tv
.tv_sec
< TYPE_MAXIMUM (time_t))
2517 /* Set the access and modification time stamps of FD (a.k.a. FILE) to be
2518 ATIME and MTIME, respectively.
2519 FD must be either negative -- in which case it is ignored --
2520 or a file descriptor that is open on FILE.
2521 If FD is nonnegative, then FILE can be NULL. */
2523 set_file_times (int fd
, const char *filename
,
2524 struct timespec atime
, struct timespec mtime
)
2526 struct timespec timespec
[2];
2527 timespec
[0] = atime
;
2528 timespec
[1] = mtime
;
2529 return fdutimens (fd
, filename
, timespec
);
2532 /* Like strsignal, except async-signal-safe, and this function typically
2533 returns a string in the C locale rather than the current locale. */
2535 safe_strsignal (int code
)
2537 char const *signame
= 0;
2539 if (0 <= code
&& code
< sys_siglist_entries
)
2540 signame
= sys_siglist
[code
];
2542 signame
= "Unknown signal";
2548 /* For make-serial-process */
2550 serial_open (Lisp_Object port
)
2552 int fd
= emacs_open (SSDATA (port
), O_RDWR
| O_NOCTTY
| O_NONBLOCK
, 0);
2554 report_file_error ("Opening serial port", port
);
2556 ioctl (fd
, TIOCEXCL
, (char *) 0);
2562 #if !defined (HAVE_CFMAKERAW)
2563 /* Workaround for targets which are missing cfmakeraw. */
2564 /* Pasted from man page. */
2566 cfmakeraw (struct termios
*termios_p
)
2568 termios_p
->c_iflag
&= ~(IGNBRK
|BRKINT
|PARMRK
|ISTRIP
|INLCR
|IGNCR
|ICRNL
|IXON
);
2569 termios_p
->c_oflag
&= ~OPOST
;
2570 termios_p
->c_lflag
&= ~(ECHO
|ECHONL
|ICANON
|ISIG
|IEXTEN
);
2571 termios_p
->c_cflag
&= ~(CSIZE
|PARENB
);
2572 termios_p
->c_cflag
|= CS8
;
2574 #endif /* !defined (HAVE_CFMAKERAW */
2576 #if !defined (HAVE_CFSETSPEED)
2577 /* Workaround for targets which are missing cfsetspeed. */
2579 cfsetspeed (struct termios
*termios_p
, speed_t vitesse
)
2581 return (cfsetispeed (termios_p
, vitesse
)
2582 + cfsetospeed (termios_p
, vitesse
));
2586 /* For serial-process-configure */
2588 serial_configure (struct Lisp_Process
*p
,
2589 Lisp_Object contact
)
2591 Lisp_Object childp2
= Qnil
;
2592 Lisp_Object tem
= Qnil
;
2593 struct termios attr
;
2595 char summary
[4] = "???"; /* This usually becomes "8N1". */
2597 childp2
= Fcopy_sequence (p
->childp
);
2599 /* Read port attributes and prepare default configuration. */
2600 err
= tcgetattr (p
->outfd
, &attr
);
2602 report_file_error ("Failed tcgetattr", Qnil
);
2604 #if defined (CLOCAL)
2605 attr
.c_cflag
|= CLOCAL
;
2608 attr
.c_cflag
|= CREAD
;
2611 /* Configure speed. */
2612 if (!NILP (Fplist_member (contact
, QCspeed
)))
2613 tem
= Fplist_get (contact
, QCspeed
);
2615 tem
= Fplist_get (p
->childp
, QCspeed
);
2617 err
= cfsetspeed (&attr
, XINT (tem
));
2619 report_file_error ("Failed cfsetspeed", tem
);
2620 childp2
= Fplist_put (childp2
, QCspeed
, tem
);
2622 /* Configure bytesize. */
2623 if (!NILP (Fplist_member (contact
, QCbytesize
)))
2624 tem
= Fplist_get (contact
, QCbytesize
);
2626 tem
= Fplist_get (p
->childp
, QCbytesize
);
2628 tem
= make_number (8);
2630 if (XINT (tem
) != 7 && XINT (tem
) != 8)
2631 error (":bytesize must be nil (8), 7, or 8");
2632 summary
[0] = XINT (tem
) + '0';
2633 #if defined (CSIZE) && defined (CS7) && defined (CS8)
2634 attr
.c_cflag
&= ~CSIZE
;
2635 attr
.c_cflag
|= ((XINT (tem
) == 7) ? CS7
: CS8
);
2637 /* Don't error on bytesize 8, which should be set by cfmakeraw. */
2638 if (XINT (tem
) != 8)
2639 error ("Bytesize cannot be changed");
2641 childp2
= Fplist_put (childp2
, QCbytesize
, tem
);
2643 /* Configure parity. */
2644 if (!NILP (Fplist_member (contact
, QCparity
)))
2645 tem
= Fplist_get (contact
, QCparity
);
2647 tem
= Fplist_get (p
->childp
, QCparity
);
2648 if (!NILP (tem
) && !EQ (tem
, Qeven
) && !EQ (tem
, Qodd
))
2649 error (":parity must be nil (no parity), `even', or `odd'");
2650 #if defined (PARENB) && defined (PARODD) && defined (IGNPAR) && defined (INPCK)
2651 attr
.c_cflag
&= ~(PARENB
| PARODD
);
2652 attr
.c_iflag
&= ~(IGNPAR
| INPCK
);
2657 else if (EQ (tem
, Qeven
))
2660 attr
.c_cflag
|= PARENB
;
2661 attr
.c_iflag
|= (IGNPAR
| INPCK
);
2663 else if (EQ (tem
, Qodd
))
2666 attr
.c_cflag
|= (PARENB
| PARODD
);
2667 attr
.c_iflag
|= (IGNPAR
| INPCK
);
2670 /* Don't error on no parity, which should be set by cfmakeraw. */
2672 error ("Parity cannot be configured");
2674 childp2
= Fplist_put (childp2
, QCparity
, tem
);
2676 /* Configure stopbits. */
2677 if (!NILP (Fplist_member (contact
, QCstopbits
)))
2678 tem
= Fplist_get (contact
, QCstopbits
);
2680 tem
= Fplist_get (p
->childp
, QCstopbits
);
2682 tem
= make_number (1);
2684 if (XINT (tem
) != 1 && XINT (tem
) != 2)
2685 error (":stopbits must be nil (1 stopbit), 1, or 2");
2686 summary
[2] = XINT (tem
) + '0';
2687 #if defined (CSTOPB)
2688 attr
.c_cflag
&= ~CSTOPB
;
2689 if (XINT (tem
) == 2)
2690 attr
.c_cflag
|= CSTOPB
;
2692 /* Don't error on 1 stopbit, which should be set by cfmakeraw. */
2693 if (XINT (tem
) != 1)
2694 error ("Stopbits cannot be configured");
2696 childp2
= Fplist_put (childp2
, QCstopbits
, tem
);
2698 /* Configure flowcontrol. */
2699 if (!NILP (Fplist_member (contact
, QCflowcontrol
)))
2700 tem
= Fplist_get (contact
, QCflowcontrol
);
2702 tem
= Fplist_get (p
->childp
, QCflowcontrol
);
2703 if (!NILP (tem
) && !EQ (tem
, Qhw
) && !EQ (tem
, Qsw
))
2704 error (":flowcontrol must be nil (no flowcontrol), `hw', or `sw'");
2705 #if defined (CRTSCTS)
2706 attr
.c_cflag
&= ~CRTSCTS
;
2708 #if defined (CNEW_RTSCTS)
2709 attr
.c_cflag
&= ~CNEW_RTSCTS
;
2711 #if defined (IXON) && defined (IXOFF)
2712 attr
.c_iflag
&= ~(IXON
| IXOFF
);
2716 /* Already configured. */
2718 else if (EQ (tem
, Qhw
))
2720 #if defined (CRTSCTS)
2721 attr
.c_cflag
|= CRTSCTS
;
2722 #elif defined (CNEW_RTSCTS)
2723 attr
.c_cflag
|= CNEW_RTSCTS
;
2725 error ("Hardware flowcontrol (RTS/CTS) not supported");
2728 else if (EQ (tem
, Qsw
))
2730 #if defined (IXON) && defined (IXOFF)
2731 attr
.c_iflag
|= (IXON
| IXOFF
);
2733 error ("Software flowcontrol (XON/XOFF) not supported");
2736 childp2
= Fplist_put (childp2
, QCflowcontrol
, tem
);
2738 /* Activate configuration. */
2739 err
= tcsetattr (p
->outfd
, TCSANOW
, &attr
);
2741 report_file_error ("Failed tcsetattr", Qnil
);
2743 childp2
= Fplist_put (childp2
, QCsummary
, build_string (summary
));
2744 pset_childp (p
, childp2
);
2746 #endif /* not DOS_NT */
2748 /* System depended enumeration of and access to system processes a-la ps(1). */
2752 /* Process enumeration and access via /proc. */
2755 list_system_processes (void)
2757 Lisp_Object procdir
, match
, proclist
, next
;
2760 /* For every process on the system, there's a directory in the
2761 "/proc" pseudo-directory whose name is the numeric ID of that
2763 procdir
= build_string ("/proc");
2764 match
= build_string ("[0-9]+");
2765 proclist
= directory_files_internal (procdir
, Qnil
, match
, Qt
, 0, Qnil
);
2767 /* `proclist' gives process IDs as strings. Destructively convert
2768 each string into a number. */
2769 for (tail
= proclist
; CONSP (tail
); tail
= next
)
2772 XSETCAR (tail
, Fstring_to_number (XCAR (tail
), Qnil
));
2775 /* directory_files_internal returns the files in reverse order; undo
2777 proclist
= Fnreverse (proclist
);
2781 #elif defined DARWIN_OS || defined __FreeBSD__
2784 list_system_processes (void)
2787 int mib
[] = {CTL_KERN
, KERN_PROC
, KERN_PROC_ALL
};
2789 int mib
[] = {CTL_KERN
, KERN_PROC
, KERN_PROC_PROC
};
2792 struct kinfo_proc
*procs
;
2795 Lisp_Object proclist
= Qnil
;
2797 if (sysctl (mib
, 3, NULL
, &len
, NULL
, 0) != 0)
2800 procs
= xmalloc (len
);
2801 if (sysctl (mib
, 3, procs
, &len
, NULL
, 0) != 0)
2807 len
/= sizeof (struct kinfo_proc
);
2808 for (i
= 0; i
< len
; i
++)
2811 proclist
= Fcons (make_fixnum_or_float (procs
[i
].kp_proc
.p_pid
), proclist
);
2813 proclist
= Fcons (make_fixnum_or_float (procs
[i
].ki_pid
), proclist
);
2822 /* The WINDOWSNT implementation is in w32.c.
2823 The MSDOS implementation is in dosfns.c. */
2824 #elif !defined (WINDOWSNT) && !defined (MSDOS)
2827 list_system_processes (void)
2832 #endif /* !defined (WINDOWSNT) */
2834 #if defined GNU_LINUX && defined HAVE_LONG_LONG_INT
2835 static struct timespec
2836 time_from_jiffies (unsigned long long tval
, long hz
)
2838 unsigned long long s
= tval
/ hz
;
2839 unsigned long long frac
= tval
% hz
;
2842 if (TYPE_MAXIMUM (time_t) < s
)
2844 if (LONG_MAX
- 1 <= ULLONG_MAX
/ TIMESPEC_RESOLUTION
2845 || frac
<= ULLONG_MAX
/ TIMESPEC_RESOLUTION
)
2846 ns
= frac
* TIMESPEC_RESOLUTION
/ hz
;
2849 /* This is reachable only in the unlikely case that HZ * HZ
2850 exceeds ULLONG_MAX. It calculates an approximation that is
2851 guaranteed to be in range. */
2852 long hz_per_ns
= (hz
/ TIMESPEC_RESOLUTION
2853 + (hz
% TIMESPEC_RESOLUTION
!= 0));
2854 ns
= frac
/ hz_per_ns
;
2857 return make_timespec (s
, ns
);
2861 ltime_from_jiffies (unsigned long long tval
, long hz
)
2863 struct timespec t
= time_from_jiffies (tval
, hz
);
2864 return make_lisp_time (t
);
2867 static struct timespec
2871 struct timespec up
= make_timespec (0, 0);
2874 fup
= emacs_fopen ("/proc/uptime", "r");
2878 unsigned long long upsec
, upfrac
, idlesec
, idlefrac
;
2879 int upfrac_start
, upfrac_end
, idlefrac_start
, idlefrac_end
;
2881 if (fscanf (fup
, "%llu.%n%llu%n %llu.%n%llu%n",
2882 &upsec
, &upfrac_start
, &upfrac
, &upfrac_end
,
2883 &idlesec
, &idlefrac_start
, &idlefrac
, &idlefrac_end
)
2886 if (TYPE_MAXIMUM (time_t) < upsec
)
2888 upsec
= TYPE_MAXIMUM (time_t);
2889 upfrac
= TIMESPEC_RESOLUTION
- 1;
2893 int upfraclen
= upfrac_end
- upfrac_start
;
2894 for (; upfraclen
< LOG10_TIMESPEC_RESOLUTION
; upfraclen
++)
2896 for (; LOG10_TIMESPEC_RESOLUTION
< upfraclen
; upfraclen
--)
2898 upfrac
= min (upfrac
, TIMESPEC_RESOLUTION
- 1);
2900 up
= make_timespec (upsec
, upfrac
);
2909 #define MAJOR(d) (((unsigned)(d) >> 8) & 0xfff)
2910 #define MINOR(d) (((unsigned)(d) & 0xff) | (((unsigned)(d) & 0xfff00000) >> 12))
2913 procfs_ttyname (int rdev
)
2916 char name
[PATH_MAX
];
2919 fdev
= emacs_fopen ("/proc/tty/drivers", "r");
2925 unsigned long minor_beg
, minor_end
;
2926 char minor
[25]; /* 2 32-bit numbers + dash */
2929 for (; !feof (fdev
) && !ferror (fdev
); name
[0] = 0)
2931 if (fscanf (fdev
, "%*s %s %u %s %*s\n", name
, &major
, minor
) >= 3
2932 && major
== MAJOR (rdev
))
2934 minor_beg
= strtoul (minor
, &endp
, 0);
2936 minor_end
= minor_beg
;
2937 else if (*endp
== '-')
2938 minor_end
= strtoul (endp
+ 1, &endp
, 0);
2942 if (MINOR (rdev
) >= minor_beg
&& MINOR (rdev
) <= minor_end
)
2944 sprintf (name
+ strlen (name
), "%u", MINOR (rdev
));
2952 return build_string (name
);
2956 procfs_get_total_memory (void)
2959 uintmax_t retval
= 2 * 1024 * 1024; /* default: 2 GiB */
2963 fmem
= emacs_fopen ("/proc/meminfo", "r");
2967 uintmax_t entry_value
;
2971 switch (fscanf (fmem
, "MemTotal: %"SCNuMAX
, &entry_value
))
2974 retval
= entry_value
;
2979 while ((c
= getc (fmem
)) != EOF
&& c
!= '\n')
2997 system_process_attributes (Lisp_Object pid
)
2999 char procfn
[PATH_MAX
], fn
[PATH_MAX
];
3003 long clocks_per_sec
;
3005 char procbuf
[1025], *p
, *q
;
3008 static char const default_cmd
[] = "???";
3009 const char *cmd
= default_cmd
;
3010 int cmdsize
= sizeof default_cmd
- 1;
3011 char *cmdline
= NULL
;
3012 ptrdiff_t cmdline_size
;
3015 int ppid
, pgrp
, sess
, tty
, tpgid
, thcount
;
3018 unsigned long long u_time
, s_time
, cutime
, cstime
, start
;
3019 long priority
, niceness
, rss
;
3020 unsigned long minflt
, majflt
, cminflt
, cmajflt
, vsize
;
3021 struct timespec tnow
, tstart
, tboot
, telapsed
, us_time
;
3023 Lisp_Object attrs
= Qnil
;
3024 Lisp_Object cmd_str
, decoded_cmd
;
3027 CHECK_NUMBER_OR_FLOAT (pid
);
3028 CONS_TO_INTEGER (pid
, pid_t
, proc_id
);
3029 sprintf (procfn
, "/proc/%"pMd
, proc_id
);
3030 if (stat (procfn
, &st
) < 0)
3035 attrs
= Fcons (Fcons (Qeuid
, make_fixnum_or_float (uid
)), attrs
);
3037 pw
= getpwuid (uid
);
3040 attrs
= Fcons (Fcons (Quser
, build_string (pw
->pw_name
)), attrs
);
3043 attrs
= Fcons (Fcons (Qegid
, make_fixnum_or_float (gid
)), attrs
);
3045 gr
= getgrgid (gid
);
3048 attrs
= Fcons (Fcons (Qgroup
, build_string (gr
->gr_name
)), attrs
);
3050 count
= SPECPDL_INDEX ();
3051 strcpy (fn
, procfn
);
3052 procfn_end
= fn
+ strlen (fn
);
3053 strcpy (procfn_end
, "/stat");
3054 fd
= emacs_open (fn
, O_RDONLY
, 0);
3059 record_unwind_protect_int (close_file_unwind
, fd
);
3060 nread
= emacs_read (fd
, procbuf
, sizeof procbuf
- 1);
3064 procbuf
[nread
] = '\0';
3067 p
= strchr (p
, '(');
3070 q
= strrchr (p
+ 1, ')');
3080 /* Command name is encoded in locale-coding-system; decode it. */
3081 cmd_str
= make_unibyte_string (cmd
, cmdsize
);
3082 decoded_cmd
= code_convert_string_norecord (cmd_str
,
3083 Vlocale_coding_system
, 0);
3084 attrs
= Fcons (Fcons (Qcomm
, decoded_cmd
), attrs
);
3086 /* state ppid pgrp sess tty tpgid . minflt cminflt majflt cmajflt
3087 utime stime cutime cstime priority nice thcount . start vsize rss */
3089 && (sscanf (q
+ 2, ("%c %d %d %d %d %d %*u %lu %lu %lu %lu "
3090 "%Lu %Lu %Lu %Lu %ld %ld %d %*d %Lu %lu %ld"),
3091 &c
, &ppid
, &pgrp
, &sess
, &tty
, &tpgid
,
3092 &minflt
, &cminflt
, &majflt
, &cmajflt
,
3093 &u_time
, &s_time
, &cutime
, &cstime
,
3094 &priority
, &niceness
, &thcount
, &start
, &vsize
, &rss
)
3099 state_str
[1] = '\0';
3100 attrs
= Fcons (Fcons (Qstate
, build_string (state_str
)), attrs
);
3101 attrs
= Fcons (Fcons (Qppid
, make_fixnum_or_float (ppid
)), attrs
);
3102 attrs
= Fcons (Fcons (Qpgrp
, make_fixnum_or_float (pgrp
)), attrs
);
3103 attrs
= Fcons (Fcons (Qsess
, make_fixnum_or_float (sess
)), attrs
);
3104 attrs
= Fcons (Fcons (Qttname
, procfs_ttyname (tty
)), attrs
);
3105 attrs
= Fcons (Fcons (Qtpgid
, make_fixnum_or_float (tpgid
)), attrs
);
3106 attrs
= Fcons (Fcons (Qminflt
, make_fixnum_or_float (minflt
)), attrs
);
3107 attrs
= Fcons (Fcons (Qmajflt
, make_fixnum_or_float (majflt
)), attrs
);
3108 attrs
= Fcons (Fcons (Qcminflt
, make_fixnum_or_float (cminflt
)),
3110 attrs
= Fcons (Fcons (Qcmajflt
, make_fixnum_or_float (cmajflt
)),
3112 clocks_per_sec
= sysconf (_SC_CLK_TCK
);
3113 if (clocks_per_sec
< 0)
3114 clocks_per_sec
= 100;
3115 attrs
= Fcons (Fcons (Qutime
,
3116 ltime_from_jiffies (u_time
, clocks_per_sec
)),
3118 attrs
= Fcons (Fcons (Qstime
,
3119 ltime_from_jiffies (s_time
, clocks_per_sec
)),
3121 attrs
= Fcons (Fcons (Qtime
,
3122 ltime_from_jiffies (s_time
+ u_time
,
3125 attrs
= Fcons (Fcons (Qcutime
,
3126 ltime_from_jiffies (cutime
, clocks_per_sec
)),
3128 attrs
= Fcons (Fcons (Qcstime
,
3129 ltime_from_jiffies (cstime
, clocks_per_sec
)),
3131 attrs
= Fcons (Fcons (Qctime
,
3132 ltime_from_jiffies (cstime
+ cutime
,
3135 attrs
= Fcons (Fcons (Qpri
, make_number (priority
)), attrs
);
3136 attrs
= Fcons (Fcons (Qnice
, make_number (niceness
)), attrs
);
3137 attrs
= Fcons (Fcons (Qthcount
, make_fixnum_or_float (thcount
)),
3139 tnow
= current_timespec ();
3140 telapsed
= get_up_time ();
3141 tboot
= timespec_sub (tnow
, telapsed
);
3142 tstart
= time_from_jiffies (start
, clocks_per_sec
);
3143 tstart
= timespec_add (tboot
, tstart
);
3144 attrs
= Fcons (Fcons (Qstart
, make_lisp_time (tstart
)), attrs
);
3145 attrs
= Fcons (Fcons (Qvsize
, make_fixnum_or_float (vsize
/ 1024)),
3147 attrs
= Fcons (Fcons (Qrss
, make_fixnum_or_float (4 * rss
)), attrs
);
3148 telapsed
= timespec_sub (tnow
, tstart
);
3149 attrs
= Fcons (Fcons (Qetime
, make_lisp_time (telapsed
)), attrs
);
3150 us_time
= time_from_jiffies (u_time
+ s_time
, clocks_per_sec
);
3151 pcpu
= timespectod (us_time
) / timespectod (telapsed
);
3154 attrs
= Fcons (Fcons (Qpcpu
, make_float (100 * pcpu
)), attrs
);
3155 pmem
= 4.0 * 100 * rss
/ procfs_get_total_memory ();
3158 attrs
= Fcons (Fcons (Qpmem
, make_float (pmem
)), attrs
);
3161 unbind_to (count
, Qnil
);
3164 strcpy (procfn_end
, "/cmdline");
3165 fd
= emacs_open (fn
, O_RDONLY
, 0);
3168 ptrdiff_t readsize
, nread_incr
;
3169 record_unwind_protect_int (close_file_unwind
, fd
);
3170 record_unwind_protect_nothing ();
3171 nread
= cmdline_size
= 0;
3175 cmdline
= xpalloc (cmdline
, &cmdline_size
, 2, STRING_BYTES_BOUND
, 1);
3176 set_unwind_protect_ptr (count
+ 1, xfree
, cmdline
);
3178 /* Leave room even if every byte needs escaping below. */
3179 readsize
= (cmdline_size
>> 1) - nread
;
3181 nread_incr
= emacs_read (fd
, cmdline
+ nread
, readsize
);
3182 nread
+= max (0, nread_incr
);
3184 while (nread_incr
== readsize
);
3188 /* We don't want trailing null characters. */
3189 for (p
= cmdline
+ nread
; cmdline
< p
&& !p
[-1]; p
--)
3192 /* Escape-quote whitespace and backslashes. */
3193 q
= cmdline
+ cmdline_size
;
3198 if (c_isspace (c
) || c
== '\\')
3202 nread
= cmdline
+ cmdline_size
- q
;
3207 nread
= cmdsize
+ 2;
3208 cmdline_size
= nread
+ 1;
3209 q
= cmdline
= xrealloc (cmdline
, cmdline_size
);
3210 set_unwind_protect_ptr (count
+ 1, xfree
, cmdline
);
3211 sprintf (cmdline
, "[%.*s]", cmdsize
, cmd
);
3213 /* Command line is encoded in locale-coding-system; decode it. */
3214 cmd_str
= make_unibyte_string (q
, nread
);
3215 decoded_cmd
= code_convert_string_norecord (cmd_str
,
3216 Vlocale_coding_system
, 0);
3217 unbind_to (count
, Qnil
);
3218 attrs
= Fcons (Fcons (Qargs
, decoded_cmd
), attrs
);
3224 #elif defined (SOLARIS2) && defined (HAVE_PROCFS)
3226 /* The <procfs.h> header does not like to be included if _LP64 is defined and
3227 __FILE_OFFSET_BITS == 64. This is an ugly workaround that. */
3228 #if !defined (_LP64) && defined (_FILE_OFFSET_BITS) && (_FILE_OFFSET_BITS == 64)
3229 #define PROCFS_FILE_OFFSET_BITS_HACK 1
3230 #undef _FILE_OFFSET_BITS
3232 #define PROCFS_FILE_OFFSET_BITS_HACK 0
3237 #if PROCFS_FILE_OFFSET_BITS_HACK == 1
3238 #define _FILE_OFFSET_BITS 64
3239 #ifdef _FILE_OFFSET_BITS /* Avoid unused-macro warnings. */
3241 #endif /* PROCFS_FILE_OFFSET_BITS_HACK == 1 */
3244 system_process_attributes (Lisp_Object pid
)
3246 char procfn
[PATH_MAX
], fn
[PATH_MAX
];
3251 struct psinfo pinfo
;
3257 Lisp_Object attrs
= Qnil
;
3258 Lisp_Object decoded_cmd
;
3261 CHECK_NUMBER_OR_FLOAT (pid
);
3262 CONS_TO_INTEGER (pid
, pid_t
, proc_id
);
3263 sprintf (procfn
, "/proc/%"pMd
, proc_id
);
3264 if (stat (procfn
, &st
) < 0)
3269 attrs
= Fcons (Fcons (Qeuid
, make_fixnum_or_float (uid
)), attrs
);
3271 pw
= getpwuid (uid
);
3274 attrs
= Fcons (Fcons (Quser
, build_string (pw
->pw_name
)), attrs
);
3277 attrs
= Fcons (Fcons (Qegid
, make_fixnum_or_float (gid
)), attrs
);
3279 gr
= getgrgid (gid
);
3282 attrs
= Fcons (Fcons (Qgroup
, build_string (gr
->gr_name
)), attrs
);
3284 count
= SPECPDL_INDEX ();
3285 strcpy (fn
, procfn
);
3286 procfn_end
= fn
+ strlen (fn
);
3287 strcpy (procfn_end
, "/psinfo");
3288 fd
= emacs_open (fn
, O_RDONLY
, 0);
3293 record_unwind_protect (close_file_unwind
, fd
);
3294 nread
= emacs_read (fd
, &pinfo
, sizeof pinfo
);
3297 if (nread
== sizeof pinfo
)
3299 attrs
= Fcons (Fcons (Qppid
, make_fixnum_or_float (pinfo
.pr_ppid
)), attrs
);
3300 attrs
= Fcons (Fcons (Qpgrp
, make_fixnum_or_float (pinfo
.pr_pgid
)), attrs
);
3301 attrs
= Fcons (Fcons (Qsess
, make_fixnum_or_float (pinfo
.pr_sid
)), attrs
);
3305 state_str
[0] = pinfo
.pr_lwp
.pr_sname
;
3306 state_str
[1] = '\0';
3307 attrs
= Fcons (Fcons (Qstate
, build_string (state_str
)), attrs
);
3310 /* FIXME: missing Qttyname. psinfo.pr_ttydev is a dev_t,
3311 need to get a string from it. */
3313 /* FIXME: missing: Qtpgid */
3325 Are they available? */
3327 attrs
= Fcons (Fcons (Qtime
, make_lisp_time (pinfo
.pr_time
)), attrs
);
3328 attrs
= Fcons (Fcons (Qctime
, make_lisp_time (pinfo
.pr_ctime
)), attrs
);
3329 attrs
= Fcons (Fcons (Qpri
, make_number (pinfo
.pr_lwp
.pr_pri
)), attrs
);
3330 attrs
= Fcons (Fcons (Qnice
, make_number (pinfo
.pr_lwp
.pr_nice
)), attrs
);
3331 attrs
= Fcons (Fcons (Qthcount
, make_fixnum_or_float (pinfo
.pr_nlwp
)),
3334 attrs
= Fcons (Fcons (Qstart
, make_lisp_time (pinfo
.pr_start
)), attrs
);
3335 attrs
= Fcons (Fcons (Qvsize
, make_fixnum_or_float (pinfo
.pr_size
)),
3337 attrs
= Fcons (Fcons (Qrss
, make_fixnum_or_float (pinfo
.pr_rssize
)),
3340 /* pr_pctcpu and pr_pctmem are unsigned integers in the
3341 range 0 .. 2**15, representing 0.0 .. 1.0. */
3342 attrs
= Fcons (Fcons (Qpcpu
,
3343 make_float (100.0 / 0x8000 * pinfo
.pr_pctcpu
)),
3345 attrs
= Fcons (Fcons (Qpmem
,
3346 make_float (100.0 / 0x8000 * pinfo
.pr_pctmem
)),
3349 decoded_cmd
= (code_convert_string_norecord
3350 (build_unibyte_string (pinfo
.pr_fname
),
3351 Vlocale_coding_system
, 0));
3352 attrs
= Fcons (Fcons (Qcomm
, decoded_cmd
), attrs
);
3353 decoded_cmd
= (code_convert_string_norecord
3354 (build_unibyte_string (pinfo
.pr_psargs
),
3355 Vlocale_coding_system
, 0));
3356 attrs
= Fcons (Fcons (Qargs
, decoded_cmd
), attrs
);
3358 unbind_to (count
, Qnil
);
3362 #elif defined __FreeBSD__
3364 static struct timespec
3365 timeval_to_timespec (struct timeval t
)
3367 return make_timespec (t
.tv_sec
, t
.tv_usec
* 1000);
3371 make_lisp_timeval (struct timeval t
)
3373 return make_lisp_time (timeval_to_timespec (t
));
3377 system_process_attributes (Lisp_Object pid
)
3380 int pagesize
= getpagesize ();
3381 unsigned long npages
;
3387 char args
[MAXPATHLEN
];
3388 struct timespec t
, now
;
3390 int mib
[4] = {CTL_KERN
, KERN_PROC
, KERN_PROC_PID
};
3391 struct kinfo_proc proc
;
3392 size_t proclen
= sizeof proc
;
3394 Lisp_Object attrs
= Qnil
;
3395 Lisp_Object decoded_comm
;
3397 CHECK_NUMBER_OR_FLOAT (pid
);
3398 CONS_TO_INTEGER (pid
, int, proc_id
);
3401 if (sysctl (mib
, 4, &proc
, &proclen
, NULL
, 0) != 0)
3404 attrs
= Fcons (Fcons (Qeuid
, make_fixnum_or_float (proc
.ki_uid
)), attrs
);
3407 pw
= getpwuid (proc
.ki_uid
);
3410 attrs
= Fcons (Fcons (Quser
, build_string (pw
->pw_name
)), attrs
);
3412 attrs
= Fcons (Fcons (Qegid
, make_fixnum_or_float (proc
.ki_svgid
)), attrs
);
3415 gr
= getgrgid (proc
.ki_svgid
);
3418 attrs
= Fcons (Fcons (Qgroup
, build_string (gr
->gr_name
)), attrs
);
3420 decoded_comm
= (code_convert_string_norecord
3421 (build_unibyte_string (proc
.ki_comm
),
3422 Vlocale_coding_system
, 0));
3424 attrs
= Fcons (Fcons (Qcomm
, decoded_comm
), attrs
);
3426 char state
[2] = {'\0', '\0'};
3427 switch (proc
.ki_stat
)
3449 attrs
= Fcons (Fcons (Qstate
, build_string (state
)), attrs
);
3452 attrs
= Fcons (Fcons (Qppid
, make_fixnum_or_float (proc
.ki_ppid
)), attrs
);
3453 attrs
= Fcons (Fcons (Qpgrp
, make_fixnum_or_float (proc
.ki_pgid
)), attrs
);
3454 attrs
= Fcons (Fcons (Qsess
, make_fixnum_or_float (proc
.ki_sid
)), attrs
);
3457 ttyname
= proc
.ki_tdev
== NODEV
? NULL
: devname (proc
.ki_tdev
, S_IFCHR
);
3460 attrs
= Fcons (Fcons (Qtty
, build_string (ttyname
)), attrs
);
3462 attrs
= Fcons (Fcons (Qtpgid
, make_fixnum_or_float (proc
.ki_tpgid
)), attrs
);
3463 attrs
= Fcons (Fcons (Qminflt
, make_fixnum_or_float (proc
.ki_rusage
.ru_minflt
)), attrs
);
3464 attrs
= Fcons (Fcons (Qmajflt
, make_fixnum_or_float (proc
.ki_rusage
.ru_majflt
)), attrs
);
3465 attrs
= Fcons (Fcons (Qcminflt
, make_number (proc
.ki_rusage_ch
.ru_minflt
)), attrs
);
3466 attrs
= Fcons (Fcons (Qcmajflt
, make_number (proc
.ki_rusage_ch
.ru_majflt
)), attrs
);
3468 attrs
= Fcons (Fcons (Qutime
, make_lisp_timeval (proc
.ki_rusage
.ru_utime
)),
3470 attrs
= Fcons (Fcons (Qstime
, make_lisp_timeval (proc
.ki_rusage
.ru_stime
)),
3472 t
= timespec_add (timeval_to_timespec (proc
.ki_rusage
.ru_utime
),
3473 timeval_to_timespec (proc
.ki_rusage
.ru_stime
));
3474 attrs
= Fcons (Fcons (Qtime
, make_lisp_time (t
)), attrs
);
3476 attrs
= Fcons (Fcons (Qcutime
,
3477 make_lisp_timeval (proc
.ki_rusage_ch
.ru_utime
)),
3479 attrs
= Fcons (Fcons (Qcstime
,
3480 make_lisp_timeval (proc
.ki_rusage_ch
.ru_utime
)),
3482 t
= timespec_add (timeval_to_timespec (proc
.ki_rusage_ch
.ru_utime
),
3483 timeval_to_timespec (proc
.ki_rusage_ch
.ru_stime
));
3484 attrs
= Fcons (Fcons (Qctime
, make_lisp_time (t
)), attrs
);
3486 attrs
= Fcons (Fcons (Qthcount
, make_fixnum_or_float (proc
.ki_numthreads
)),
3488 attrs
= Fcons (Fcons (Qpri
, make_number (proc
.ki_pri
.pri_native
)), attrs
);
3489 attrs
= Fcons (Fcons (Qnice
, make_number (proc
.ki_nice
)), attrs
);
3490 attrs
= Fcons (Fcons (Qstart
, make_lisp_timeval (proc
.ki_start
)), attrs
);
3491 attrs
= Fcons (Fcons (Qvsize
, make_number (proc
.ki_size
>> 10)), attrs
);
3492 attrs
= Fcons (Fcons (Qrss
, make_number (proc
.ki_rssize
* pagesize
>> 10)),
3495 now
= current_timespec ();
3496 t
= timespec_sub (now
, timeval_to_timespec (proc
.ki_start
));
3497 attrs
= Fcons (Fcons (Qetime
, make_lisp_time (t
)), attrs
);
3499 len
= sizeof fscale
;
3500 if (sysctlbyname ("kern.fscale", &fscale
, &len
, NULL
, 0) == 0)
3505 if (sysctlbyname ("kern.ccpu", &ccpu
, &len
, NULL
, 0) == 0)
3507 pcpu
= (100.0 * proc
.ki_pctcpu
/ fscale
3508 / (1 - exp (proc
.ki_swtime
* log ((double) ccpu
/ fscale
))));
3509 attrs
= Fcons (Fcons (Qpcpu
, make_fixnum_or_float (pcpu
)), attrs
);
3513 len
= sizeof npages
;
3514 if (sysctlbyname ("hw.availpages", &npages
, &len
, NULL
, 0) == 0)
3516 double pmem
= (proc
.ki_flag
& P_INMEM
3517 ? 100.0 * proc
.ki_rssize
/ npages
3519 attrs
= Fcons (Fcons (Qpmem
, make_fixnum_or_float (pmem
)), attrs
);
3522 mib
[2] = KERN_PROC_ARGS
;
3524 if (sysctl (mib
, 4, args
, &len
, NULL
, 0) == 0)
3527 for (i
= 0; i
< len
; i
++)
3529 if (! args
[i
] && i
< len
- 1)
3534 (code_convert_string_norecord
3535 (build_unibyte_string (args
),
3536 Vlocale_coding_system
, 0));
3538 attrs
= Fcons (Fcons (Qargs
, decoded_comm
), attrs
);
3544 /* The WINDOWSNT implementation is in w32.c.
3545 The MSDOS implementation is in dosfns.c. */
3546 #elif !defined (WINDOWSNT) && !defined (MSDOS)
3549 system_process_attributes (Lisp_Object pid
)
3554 #endif /* !defined (WINDOWSNT) */
3556 /* Wide character string collation. */
3558 #ifdef __STDC_ISO_10646__
3560 # include <wctype.h>
3562 # if defined HAVE_NEWLOCALE || defined HAVE_SETLOCALE
3563 # include <locale.h>
3566 # define LC_COLLATE 0
3568 # ifndef LC_COLLATE_MASK
3569 # define LC_COLLATE_MASK 0
3574 # ifndef LC_CTYPE_MASK
3575 # define LC_CTYPE_MASK 0
3578 # ifndef HAVE_NEWLOCALE
3584 # define freelocale emacs_freelocale
3585 # define locale_t emacs_locale_t
3586 # define newlocale emacs_newlocale
3587 # define wcscoll_l emacs_wcscoll_l
3588 # define towlower_l emacs_towlower_l
3590 typedef char const *locale_t
;
3593 newlocale (int category_mask
, char const *locale
, locale_t loc
)
3599 freelocale (locale_t loc
)
3604 emacs_setlocale (int category
, char const *locale
)
3606 # ifdef HAVE_SETLOCALE
3608 char *loc
= setlocale (category
, locale
);
3619 wcscoll_l (wchar_t const *a
, wchar_t const *b
, locale_t loc
)
3622 char *oldloc
= emacs_setlocale (LC_COLLATE
, NULL
);
3630 char *oldcopy
= SAFE_ALLOCA (strlen (oldloc
) + 1);
3631 strcpy (oldcopy
, oldloc
);
3632 if (! emacs_setlocale (LC_COLLATE
, loc
))
3637 result
= wcscoll (a
, b
);
3639 if (! emacs_setlocale (LC_COLLATE
, oldcopy
))
3650 towlower_l (wint_t wc
, locale_t loc
)
3653 char *oldloc
= emacs_setlocale (LC_CTYPE
, NULL
);
3658 char *oldcopy
= SAFE_ALLOCA (strlen (oldloc
) + 1);
3659 strcpy (oldcopy
, oldloc
);
3660 if (emacs_setlocale (LC_CTYPE
, loc
))
3662 result
= towlower (wc
);
3663 emacs_setlocale (LC_COLLATE
, oldcopy
);
3673 str_collate (Lisp_Object s1
, Lisp_Object s2
,
3674 Lisp_Object locale
, Lisp_Object ignore_case
)
3677 ptrdiff_t len
, i
, i_byte
;
3682 /* Convert byte stream to code points. */
3683 len
= SCHARS (s1
); i
= i_byte
= 0;
3684 SAFE_NALLOCA (p1
, 1, len
+ 1);
3686 FETCH_STRING_CHAR_ADVANCE (*(p1
+i
-1), s1
, i
, i_byte
);
3689 len
= SCHARS (s2
); i
= i_byte
= 0;
3690 SAFE_NALLOCA (p2
, 1, len
+ 1);
3692 FETCH_STRING_CHAR_ADVANCE (*(p2
+i
-1), s2
, i
, i_byte
);
3695 if (STRINGP (locale
))
3697 locale_t loc
= newlocale (LC_COLLATE_MASK
| LC_CTYPE_MASK
,
3698 SSDATA (locale
), 0);
3700 error ("Invalid locale %s: %s", SSDATA (locale
), strerror (errno
));
3702 if (! NILP (ignore_case
))
3703 for (int i
= 1; i
< 3; i
++)
3705 wchar_t *p
= (i
== 1) ? p1
: p2
;
3707 *p
= towlower_l (*p
, loc
);
3711 res
= wcscoll_l (p1
, p2
, loc
);
3717 if (! NILP (ignore_case
))
3718 for (int i
= 1; i
< 3; i
++)
3720 wchar_t *p
= (i
== 1) ? p1
: p2
;
3726 res
= wcscoll (p1
, p2
);
3729 # ifndef HAVE_NEWLOCALE
3731 error ("Invalid locale or string for collation: %s", strerror (err
));
3734 error ("Invalid string for collation: %s", strerror (err
));
3740 #endif /* __STDC_ISO_10646__ */
3744 str_collate (Lisp_Object s1
, Lisp_Object s2
,
3745 Lisp_Object locale
, Lisp_Object ignore_case
)
3748 char *loc
= STRINGP (locale
) ? SSDATA (locale
) : NULL
;
3749 int res
, err
= errno
;
3752 res
= w32_compare_strings (SDATA (s1
), SDATA (s2
), loc
, !NILP (ignore_case
));
3754 error ("Invalid string for collation: %s", strerror (errno
));
3759 #endif /* WINDOWSNT */