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
10 (at 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/>. */
22 /* If HYBRID_GET_CURRENT_DIR_NAME is defined in conf_post.h, then we
23 need the following before including unistd.h, in order to pick up
24 the right prototype for gget_current_dir_name. */
25 #ifdef HYBRID_GET_CURRENT_DIR_NAME
26 #undef get_current_dir_name
27 #define get_current_dir_name gget_current_dir_name
35 #endif /* HAVE_PWD_H */
43 #include "sysselect.h"
44 #include "blockinput.h"
46 #if defined DARWIN_OS || defined __FreeBSD__
47 # include <sys/sysctl.h>
51 /* Sparc/ARM machine/frame.h has 'struct frame' which conflicts with Emacs's
52 'struct frame', so rename it. */
53 # define frame freebsd_frame
54 # include <sys/user.h>
62 #define write sys_write
64 #define STDERR_FILENO fileno(GetStdHandle(STD_ERROR_HANDLE))
67 #endif /* not WINDOWSNT */
69 #include <sys/types.h>
73 /* Get SI_SRPC_DOMAIN, if it is available. */
74 #ifdef HAVE_SYS_SYSTEMINFO_H
75 #include <sys/systeminfo.h>
78 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida, MW Aug 1993 */
82 #include <sys/param.h>
89 #ifdef HAVE_SYS_UTSNAME_H
90 #include <sys/utsname.h>
92 #endif /* HAVE_SYS_UTSNAME_H */
96 #include "termhooks.h"
103 # include <gnutls/gnutls.h>
105 #if 0x020c00 <= GNUTLS_VERSION_NUMBER
106 # include <gnutls/crypto.h>
108 # define gnutls_rnd(level, data, len) (-1)
113 /* In process.h which conflicts with the local copy. */
115 int _cdecl
_spawnlp (int, const char *, const char *, ...);
116 int _cdecl
_getpid (void);
117 /* The following is needed for O_CLOEXEC, F_SETFD, FD_CLOEXEC, and
118 several prototypes of functions called below. */
119 #include <sys/socket.h>
122 #include "syssignal.h"
125 /* ULLONG_MAX is missing on Red Hat Linux 7.3; see Bug#11781. */
127 #define ULLONG_MAX TYPE_MAXIMUM (unsigned long long int)
130 /* Declare here, including term.h is problematic on some systems. */
131 extern void tputs (const char *, int, int (*)(int));
133 static const int baud_convert
[] =
135 0, 50, 75, 110, 135, 150, 200, 300, 600, 1200,
136 1800, 2400, 4800, 9600, 19200, 38400
139 #if !defined HAVE_GET_CURRENT_DIR_NAME || defined BROKEN_GET_CURRENT_DIR_NAME \
140 || (defined HYBRID_GET_CURRENT_DIR_NAME)
141 /* Return the current working directory. Returns NULL on errors.
142 Any other returned value must be freed with free. This is used
143 only when get_current_dir_name is not defined on the system. */
145 get_current_dir_name (void)
148 char *pwd
= getenv ("PWD");
149 struct stat dotstat
, pwdstat
;
150 /* If PWD is accurate, use it instead of calling getcwd. PWD is
151 sometimes a nicer name, and using it may avoid a fatal error if a
152 parent directory is searchable but not readable. */
154 && (IS_DIRECTORY_SEP (*pwd
) || (*pwd
&& IS_DEVICE_SEP (pwd
[1])))
155 && stat (pwd
, &pwdstat
) == 0
156 && stat (".", &dotstat
) == 0
157 && dotstat
.st_ino
== pwdstat
.st_ino
158 && dotstat
.st_dev
== pwdstat
.st_dev
160 && strlen (pwd
) < MAXPATHLEN
164 buf
= malloc (strlen (pwd
) + 1);
171 size_t buf_size
= 1024;
172 buf
= malloc (buf_size
);
177 if (getcwd (buf
, buf_size
) == buf
)
181 int tmp_errno
= errno
;
187 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)
1411 char *hostname_alloc
= NULL
;
1413 #ifndef HAVE_GETHOSTNAME
1416 hostname
= uts
.nodename
;
1417 #else /* HAVE_GETHOSTNAME */
1418 char hostname_buf
[256];
1419 ptrdiff_t hostname_size
= sizeof hostname_buf
;
1420 hostname
= hostname_buf
;
1422 /* Try to get the host name; if the buffer is too short, try
1423 again. Apparently, the only indication gethostname gives of
1424 whether the buffer was large enough is the presence or absence
1425 of a '\0' in the string. Eech. */
1428 gethostname (hostname
, hostname_size
- 1);
1429 hostname
[hostname_size
- 1] = '\0';
1431 /* Was the buffer large enough for the '\0'? */
1432 if (strlen (hostname
) < hostname_size
- 1)
1435 hostname
= hostname_alloc
= xpalloc (hostname_alloc
, &hostname_size
, 1,
1436 min (PTRDIFF_MAX
, SIZE_MAX
), 1);
1438 #endif /* HAVE_GETHOSTNAME */
1440 for (p
= hostname
; *p
; p
++)
1441 if (*p
== ' ' || *p
== '\t')
1443 if (! (STRINGP (Vsystem_name
) && SBYTES (Vsystem_name
) == p
- hostname
1444 && strcmp (SSDATA (Vsystem_name
), hostname
) == 0))
1445 Vsystem_name
= build_string (hostname
);
1446 xfree (hostname_alloc
);
1449 sigset_t empty_mask
;
1451 static struct sigaction process_fatal_action
;
1454 emacs_sigaction_flags (void)
1457 /* SA_RESTART causes interruptible functions with timeouts (e.g.,
1458 'select') to reset their timeout on some platforms (e.g.,
1459 HP-UX 11), which is not what we want. Also, when Emacs is
1460 interactive, we don't want SA_RESTART because we need to poll
1461 for pending input so we need long-running syscalls to be interrupted
1462 after a signal that sets pending_signals.
1464 Non-interactive keyboard input goes through stdio, where we
1465 always want restartable system calls. */
1472 /* Store into *ACTION a signal action suitable for Emacs, with handler
1475 emacs_sigaction_init (struct sigaction
*action
, signal_handler_t handler
)
1477 sigemptyset (&action
->sa_mask
);
1479 /* When handling a signal, block nonfatal system signals that are caught
1480 by Emacs. This makes race conditions less likely. */
1481 sigaddset (&action
->sa_mask
, SIGALRM
);
1483 sigaddset (&action
->sa_mask
, SIGCHLD
);
1486 sigaddset (&action
->sa_mask
, SIGDANGER
);
1488 #ifdef PROFILER_CPU_SUPPORT
1489 sigaddset (&action
->sa_mask
, SIGPROF
);
1492 sigaddset (&action
->sa_mask
, SIGWINCH
);
1494 if (! noninteractive
)
1496 sigaddset (&action
->sa_mask
, SIGINT
);
1497 sigaddset (&action
->sa_mask
, SIGQUIT
);
1499 sigaddset (&action
->sa_mask
, SIGIO
);
1503 action
->sa_handler
= handler
;
1504 action
->sa_flags
= emacs_sigaction_flags ();
1507 #ifdef FORWARD_SIGNAL_TO_MAIN_THREAD
1508 static pthread_t main_thread
;
1511 /* SIG has arrived at the current process. Deliver it to the main
1512 thread, which should handle it with HANDLER.
1514 If we are on the main thread, handle the signal SIG with HANDLER.
1515 Otherwise, redirect the signal to the main thread, blocking it from
1516 this thread. POSIX says any thread can receive a signal that is
1517 associated with a process, process group, or asynchronous event.
1518 On GNU/Linux that is not true, but for other systems (FreeBSD at
1521 deliver_process_signal (int sig
, signal_handler_t handler
)
1523 /* Preserve errno, to avoid race conditions with signal handlers that
1524 might change errno. Races can occur even in single-threaded hosts. */
1525 int old_errno
= errno
;
1527 bool on_main_thread
= true;
1528 #ifdef FORWARD_SIGNAL_TO_MAIN_THREAD
1529 if (! pthread_equal (pthread_self (), main_thread
))
1532 sigemptyset (&blocked
);
1533 sigaddset (&blocked
, sig
);
1534 pthread_sigmask (SIG_BLOCK
, &blocked
, 0);
1535 pthread_kill (main_thread
, sig
);
1536 on_main_thread
= false;
1545 /* Static location to save a fatal backtrace in a thread.
1546 FIXME: If two subsidiary threads fail simultaneously, the resulting
1547 backtrace may be garbage. */
1548 enum { BACKTRACE_LIMIT_MAX
= 500 };
1549 static void *thread_backtrace_buffer
[BACKTRACE_LIMIT_MAX
+ 1];
1550 static int thread_backtrace_npointers
;
1552 /* SIG has arrived at the current thread.
1553 If we are on the main thread, handle the signal SIG with HANDLER.
1554 Otherwise, this is a fatal error in the handling thread. */
1556 deliver_thread_signal (int sig
, signal_handler_t handler
)
1558 int old_errno
= errno
;
1560 #ifdef FORWARD_SIGNAL_TO_MAIN_THREAD
1561 if (! pthread_equal (pthread_self (), main_thread
))
1563 thread_backtrace_npointers
1564 = backtrace (thread_backtrace_buffer
, BACKTRACE_LIMIT_MAX
);
1565 sigaction (sig
, &process_fatal_action
, 0);
1566 pthread_kill (main_thread
, sig
);
1568 /* Avoid further damage while the main thread is exiting. */
1570 sigsuspend (&empty_mask
);
1578 #if !HAVE_DECL_SYS_SIGLIST
1580 # ifdef _sys_siglist
1581 # define sys_siglist _sys_siglist
1582 # elif HAVE_DECL___SYS_SIGLIST
1583 # define sys_siglist __sys_siglist
1585 # define sys_siglist my_sys_siglist
1586 static char const *sys_siglist
[NSIG
];
1591 # define sys_siglist_entries _sys_nsig
1593 # define sys_siglist_entries NSIG
1596 /* Handle bus errors, invalid instruction, etc. */
1598 handle_fatal_signal (int sig
)
1600 terminate_due_to_signal (sig
, 40);
1604 deliver_fatal_signal (int sig
)
1606 deliver_process_signal (sig
, handle_fatal_signal
);
1610 deliver_fatal_thread_signal (int sig
)
1612 deliver_thread_signal (sig
, handle_fatal_signal
);
1615 static _Noreturn
void
1616 handle_arith_signal (int sig
)
1618 pthread_sigmask (SIG_SETMASK
, &empty_mask
, 0);
1619 xsignal0 (Qarith_error
);
1622 #if defined HAVE_STACK_OVERFLOW_HANDLING && !defined WINDOWSNT
1624 /* Alternate stack used by SIGSEGV handler below. */
1626 static unsigned char sigsegv_stack
[SIGSTKSZ
];
1629 /* Return true if SIGINFO indicates a stack overflow. */
1632 stack_overflow (siginfo_t
*siginfo
)
1634 /* In theory, a more-accurate heuristic can be obtained by using
1635 GNU/Linux pthread_getattr_np along with POSIX pthread_attr_getstack
1636 and pthread_attr_getguardsize to find the location and size of the
1637 guard area. In practice, though, these functions are so hard to
1638 use reliably that they're not worth bothering with. E.g., see:
1639 https://sourceware.org/bugzilla/show_bug.cgi?id=16291
1640 Other operating systems also have problems, e.g., Solaris's
1641 stack_violation function is tailor-made for this problem, but it
1642 doesn't work on Solaris 11.2 x86-64 with a 32-bit executable.
1644 GNU libsigsegv is overkill for Emacs; otherwise it might be a
1650 /* The faulting address. */
1651 char *addr
= siginfo
->si_addr
;
1655 /* The known top and bottom of the stack. The actual stack may
1656 extend a bit beyond these boundaries. */
1657 char *bot
= stack_bottom
;
1658 char *top
= near_C_stack_top ();
1660 /* Log base 2 of the stack heuristic ratio. This ratio is the size
1661 of the known stack divided by the size of the guard area past the
1662 end of the stack top. The heuristic is that a bad address is
1663 considered to be a stack overflow if it occurs within
1664 stacksize>>LG_STACK_HEURISTIC bytes above the top of the known
1665 stack. This heuristic is not exactly correct but it's good
1666 enough in practice. */
1667 enum { LG_STACK_HEURISTIC
= 8 };
1670 return 0 <= addr
- top
&& addr
- top
< (top
- bot
) >> LG_STACK_HEURISTIC
;
1672 return 0 <= top
- addr
&& top
- addr
< (bot
- top
) >> LG_STACK_HEURISTIC
;
1676 /* Attempt to recover from SIGSEGV caused by C stack overflow. */
1679 handle_sigsegv (int sig
, siginfo_t
*siginfo
, void *arg
)
1681 /* Hard GC error may lead to stack overflow caused by
1682 too nested calls to mark_object. No way to survive. */
1683 bool fatal
= gc_in_progress
;
1685 #ifdef FORWARD_SIGNAL_TO_MAIN_THREAD
1686 if (!fatal
&& !pthread_equal (pthread_self (), main_thread
))
1690 if (!fatal
&& stack_overflow (siginfo
))
1691 siglongjmp (return_to_command_loop
, 1);
1693 /* Otherwise we can't do anything with this. */
1694 deliver_fatal_thread_signal (sig
);
1697 /* Return true if we have successfully set up SIGSEGV handler on alternate
1698 stack. Otherwise we just treat SIGSEGV among the rest of fatal signals. */
1703 struct sigaction sa
;
1706 ss
.ss_sp
= sigsegv_stack
;
1707 ss
.ss_size
= sizeof (sigsegv_stack
);
1709 if (sigaltstack (&ss
, NULL
) < 0)
1712 sigfillset (&sa
.sa_mask
);
1713 sa
.sa_sigaction
= handle_sigsegv
;
1714 sa
.sa_flags
= SA_SIGINFO
| SA_ONSTACK
| emacs_sigaction_flags ();
1715 return sigaction (SIGSEGV
, &sa
, NULL
) < 0 ? 0 : 1;
1718 #else /* not HAVE_STACK_OVERFLOW_HANDLING or WINDOWSNT */
1726 #endif /* HAVE_STACK_OVERFLOW_HANDLING && !WINDOWSNT */
1729 deliver_arith_signal (int sig
)
1731 deliver_thread_signal (sig
, handle_arith_signal
);
1736 /* Handler for SIGDANGER. */
1738 handle_danger_signal (int sig
)
1740 malloc_warning ("Operating system warns that virtual memory is running low.\n");
1742 /* It might be unsafe to call do_auto_save now. */
1743 force_auto_save_soon ();
1747 deliver_danger_signal (int sig
)
1749 deliver_process_signal (sig
, handle_danger_signal
);
1753 /* Treat SIG as a terminating signal, unless it is already ignored and
1754 we are in --batch mode. Among other things, this makes nohup work. */
1756 maybe_fatal_sig (int sig
)
1758 bool catch_sig
= !noninteractive
;
1761 struct sigaction old_action
;
1762 sigaction (sig
, 0, &old_action
);
1763 catch_sig
= old_action
.sa_handler
!= SIG_IGN
;
1766 sigaction (sig
, &process_fatal_action
, 0);
1770 init_signals (bool dumping
)
1772 struct sigaction thread_fatal_action
;
1773 struct sigaction action
;
1775 sigemptyset (&empty_mask
);
1777 #ifdef FORWARD_SIGNAL_TO_MAIN_THREAD
1778 main_thread
= pthread_self ();
1781 #if !HAVE_DECL_SYS_SIGLIST && !defined _sys_siglist
1784 sys_siglist
[SIGABRT
] = "Aborted";
1786 sys_siglist
[SIGAIO
] = "LAN I/O interrupt";
1788 sys_siglist
[SIGALRM
] = "Alarm clock";
1790 sys_siglist
[SIGBUS
] = "Bus error";
1793 sys_siglist
[SIGCHLD
] = "Child status changed";
1796 sys_siglist
[SIGCONT
] = "Continued";
1799 sys_siglist
[SIGDANGER
] = "Swap space dangerously low";
1802 sys_siglist
[SIGDGNOTIFY
] = "Notification message in queue";
1805 sys_siglist
[SIGEMT
] = "Emulation trap";
1807 sys_siglist
[SIGFPE
] = "Arithmetic exception";
1809 sys_siglist
[SIGFREEZE
] = "SIGFREEZE";
1812 sys_siglist
[SIGGRANT
] = "Monitor mode granted";
1814 sys_siglist
[SIGHUP
] = "Hangup";
1815 sys_siglist
[SIGILL
] = "Illegal instruction";
1816 sys_siglist
[SIGINT
] = "Interrupt";
1818 sys_siglist
[SIGIO
] = "I/O possible";
1821 sys_siglist
[SIGIOINT
] = "I/O intervention required";
1824 sys_siglist
[SIGIOT
] = "IOT trap";
1826 sys_siglist
[SIGKILL
] = "Killed";
1828 sys_siglist
[SIGLOST
] = "Resource lost";
1831 sys_siglist
[SIGLWP
] = "SIGLWP";
1834 sys_siglist
[SIGMSG
] = "Monitor mode data available";
1837 sys_siglist
[SIGWIND
] = "SIGPHONE";
1839 sys_siglist
[SIGPIPE
] = "Broken pipe";
1841 sys_siglist
[SIGPOLL
] = "Pollable event occurred";
1844 sys_siglist
[SIGPROF
] = "Profiling timer expired";
1847 sys_siglist
[SIGPTY
] = "PTY I/O interrupt";
1850 sys_siglist
[SIGPWR
] = "Power-fail restart";
1852 sys_siglist
[SIGQUIT
] = "Quit";
1854 sys_siglist
[SIGRETRACT
] = "Need to relinquish monitor mode";
1857 sys_siglist
[SIGSAK
] = "Secure attention";
1859 sys_siglist
[SIGSEGV
] = "Segmentation violation";
1861 sys_siglist
[SIGSOUND
] = "Sound completed";
1864 sys_siglist
[SIGSTOP
] = "Stopped (signal)";
1867 sys_siglist
[SIGSTP
] = "Stopped (user)";
1870 sys_siglist
[SIGSYS
] = "Bad argument to system call";
1872 sys_siglist
[SIGTERM
] = "Terminated";
1874 sys_siglist
[SIGTHAW
] = "SIGTHAW";
1877 sys_siglist
[SIGTRAP
] = "Trace/breakpoint trap";
1880 sys_siglist
[SIGTSTP
] = "Stopped (user)";
1883 sys_siglist
[SIGTTIN
] = "Stopped (tty input)";
1886 sys_siglist
[SIGTTOU
] = "Stopped (tty output)";
1889 sys_siglist
[SIGURG
] = "Urgent I/O condition";
1892 sys_siglist
[SIGUSR1
] = "User defined signal 1";
1895 sys_siglist
[SIGUSR2
] = "User defined signal 2";
1898 sys_siglist
[SIGVTALRM
] = "Virtual timer expired";
1901 sys_siglist
[SIGWAITING
] = "Process's LWPs are blocked";
1904 sys_siglist
[SIGWINCH
] = "Window size changed";
1907 sys_siglist
[SIGWIND
] = "SIGWIND";
1910 sys_siglist
[SIGXCPU
] = "CPU time limit exceeded";
1913 sys_siglist
[SIGXFSZ
] = "File size limit exceeded";
1916 #endif /* !HAVE_DECL_SYS_SIGLIST && !_sys_siglist */
1918 /* Don't alter signal handlers if dumping. On some machines,
1919 changing signal handlers sets static data that would make signals
1920 fail to work right when the dumped Emacs is run. */
1924 sigfillset (&process_fatal_action
.sa_mask
);
1925 process_fatal_action
.sa_handler
= deliver_fatal_signal
;
1926 process_fatal_action
.sa_flags
= emacs_sigaction_flags ();
1928 sigfillset (&thread_fatal_action
.sa_mask
);
1929 thread_fatal_action
.sa_handler
= deliver_fatal_thread_signal
;
1930 thread_fatal_action
.sa_flags
= process_fatal_action
.sa_flags
;
1932 /* SIGINT may need special treatment on MS-Windows. See
1933 http://lists.gnu.org/archive/html/emacs-devel/2010-09/msg01062.html
1934 Please update the doc of kill-emacs, kill-emacs-hook, and
1935 NEWS if you change this. */
1937 maybe_fatal_sig (SIGHUP
);
1938 maybe_fatal_sig (SIGINT
);
1939 maybe_fatal_sig (SIGTERM
);
1941 /* Emacs checks for write errors, so it can safely ignore SIGPIPE.
1942 However, in batch mode leave SIGPIPE alone, as that causes Emacs
1943 to behave more like typical batch applications do. */
1944 if (! noninteractive
)
1945 signal (SIGPIPE
, SIG_IGN
);
1947 sigaction (SIGQUIT
, &process_fatal_action
, 0);
1948 sigaction (SIGILL
, &thread_fatal_action
, 0);
1949 sigaction (SIGTRAP
, &thread_fatal_action
, 0);
1951 /* Typically SIGFPE is thread-specific and is fatal, like SIGILL.
1952 But on a non-IEEE host SIGFPE can come from a trap in the Lisp
1953 interpreter's floating point operations, so treat SIGFPE as an
1954 arith-error if it arises in the main thread. */
1955 if (IEEE_FLOATING_POINT
)
1956 sigaction (SIGFPE
, &thread_fatal_action
, 0);
1959 emacs_sigaction_init (&action
, deliver_arith_signal
);
1960 sigaction (SIGFPE
, &action
, 0);
1964 add_user_signal (SIGUSR1
, "sigusr1");
1967 add_user_signal (SIGUSR2
, "sigusr2");
1969 sigaction (SIGABRT
, &thread_fatal_action
, 0);
1971 sigaction (SIGPRE
, &thread_fatal_action
, 0);
1974 sigaction (SIGORE
, &thread_fatal_action
, 0);
1977 sigaction (SIGUME
, &thread_fatal_action
, 0);
1980 sigaction (SIGDLK
, &process_fatal_action
, 0);
1983 sigaction (SIGCPULIM
, &process_fatal_action
, 0);
1986 sigaction (SIGIOT
, &thread_fatal_action
, 0);
1989 sigaction (SIGEMT
, &thread_fatal_action
, 0);
1992 sigaction (SIGBUS
, &thread_fatal_action
, 0);
1994 if (!init_sigsegv ())
1995 sigaction (SIGSEGV
, &thread_fatal_action
, 0);
1997 sigaction (SIGSYS
, &thread_fatal_action
, 0);
1999 sigaction (SIGTERM
, &process_fatal_action
, 0);
2001 signal (SIGPROF
, SIG_IGN
);
2004 sigaction (SIGVTALRM
, &process_fatal_action
, 0);
2007 sigaction (SIGXCPU
, &process_fatal_action
, 0);
2010 sigaction (SIGXFSZ
, &process_fatal_action
, 0);
2014 /* This just means available memory is getting low. */
2015 emacs_sigaction_init (&action
, deliver_danger_signal
);
2016 sigaction (SIGDANGER
, &action
, 0);
2019 /* AIX-specific signals. */
2021 sigaction (SIGGRANT
, &process_fatal_action
, 0);
2024 sigaction (SIGMIGRATE
, &process_fatal_action
, 0);
2027 sigaction (SIGMSG
, &process_fatal_action
, 0);
2030 sigaction (SIGRETRACT
, &process_fatal_action
, 0);
2033 sigaction (SIGSAK
, &process_fatal_action
, 0);
2036 sigaction (SIGSOUND
, &process_fatal_action
, 0);
2039 sigaction (SIGTALRM
, &thread_fatal_action
, 0);
2049 /* Figure out how many bits the system's random number generator uses.
2050 `random' and `lrand48' are assumed to return 31 usable bits.
2051 BSD `rand' returns a 31 bit value but the low order bits are unusable;
2052 so we'll shift it and treat it like the 15-bit USG `rand'. */
2056 # define RAND_BITS 31
2057 # else /* !HAVE_RANDOM */
2058 # ifdef HAVE_LRAND48
2059 # define RAND_BITS 31
2060 # define random lrand48
2061 # else /* !HAVE_LRAND48 */
2062 # define RAND_BITS 15
2063 # if RAND_MAX == 32767
2064 # define random rand
2065 # else /* RAND_MAX != 32767 */
2066 # if RAND_MAX == 2147483647
2067 # define random() (rand () >> 16)
2068 # else /* RAND_MAX != 2147483647 */
2070 # define random rand
2072 # define random() (rand () >> 16)
2074 # endif /* RAND_MAX != 2147483647 */
2075 # endif /* RAND_MAX != 32767 */
2076 # endif /* !HAVE_LRAND48 */
2077 # endif /* !HAVE_RANDOM */
2078 #endif /* !RAND_BITS */
2081 typedef unsigned int random_seed
;
2082 static void set_random_seed (random_seed arg
) { srandom (arg
); }
2083 #elif defined HAVE_LRAND48
2084 /* Although srand48 uses a long seed, this is unsigned long to avoid
2085 undefined behavior on signed integer overflow in init_random. */
2086 typedef unsigned long int random_seed
;
2087 static void set_random_seed (random_seed arg
) { srand48 (arg
); }
2089 typedef unsigned int random_seed
;
2090 static void set_random_seed (random_seed arg
) { srand (arg
); }
2094 seed_random (void *seed
, ptrdiff_t seed_size
)
2096 random_seed arg
= 0;
2097 unsigned char *argp
= (unsigned char *) &arg
;
2098 unsigned char *seedp
= seed
;
2099 for (ptrdiff_t i
= 0; i
< seed_size
; i
++)
2100 argp
[i
% sizeof arg
] ^= seedp
[i
];
2101 set_random_seed (arg
);
2108 if (gnutls_rnd (GNUTLS_RND_NONCE
, &v
, sizeof v
) != 0)
2110 bool success
= false;
2112 int fd
= emacs_open ("/dev/urandom", O_RDONLY
| O_BINARY
, 0);
2115 success
= emacs_read (fd
, &v
, sizeof v
) == sizeof v
;
2119 success
= w32_init_random (&v
, sizeof v
) == 0;
2123 /* Fall back to current time value + PID. */
2124 struct timespec t
= current_timespec ();
2125 v
= getpid () ^ t
.tv_sec
^ t
.tv_nsec
;
2128 set_random_seed (v
);
2132 * Return a nonnegative random integer out of whatever we've got.
2133 * It contains enough bits to make a random (signed) Emacs fixnum.
2134 * This suffices even for a 64-bit architecture with a 15-bit rand.
2141 for (i
= 0; i
< (FIXNUM_BITS
+ RAND_BITS
- 1) / RAND_BITS
; i
++)
2142 val
= (random () ^ (val
<< RAND_BITS
)
2143 ^ (val
>> (BITS_PER_EMACS_INT
- RAND_BITS
)));
2144 val
^= val
>> (BITS_PER_EMACS_INT
- FIXNUM_BITS
);
2145 return val
& INTMASK
;
2148 #ifndef HAVE_SNPRINTF
2149 /* Approximate snprintf as best we can on ancient hosts that lack it. */
2151 snprintf (char *buf
, size_t bufsize
, char const *format
, ...)
2153 ptrdiff_t size
= min (bufsize
, PTRDIFF_MAX
);
2154 ptrdiff_t nbytes
= size
- 1;
2159 va_start (ap
, format
);
2160 nbytes
= doprnt (buf
, size
, format
, 0, ap
);
2164 if (nbytes
== size
- 1)
2166 /* Calculate the length of the string that would have been created
2167 had the buffer been large enough. */
2168 char stackbuf
[4000];
2170 ptrdiff_t bsize
= sizeof stackbuf
;
2171 va_start (ap
, format
);
2172 nbytes
= evxprintf (&b
, &bsize
, stackbuf
, -1, format
, ap
);
2178 if (INT_MAX
< nbytes
)
2191 /* If a backtrace is available, output the top lines of it to stderr.
2192 Do not output more than BACKTRACE_LIMIT or BACKTRACE_LIMIT_MAX lines.
2193 This function may be called from a signal handler, so it should
2194 not invoke async-unsafe functions like malloc.
2196 If BACKTRACE_LIMIT is -1, initialize tables that 'backtrace' uses
2197 but do not output anything. This avoids some problems that can
2198 otherwise occur if the malloc arena is corrupted before 'backtrace'
2199 is called, since 'backtrace' may call malloc if the tables are not
2202 If the static variable THREAD_BACKTRACE_NPOINTERS is nonzero, a
2203 fatal error has occurred in some other thread; generate a thread
2204 backtrace instead, ignoring BACKTRACE_LIMIT. */
2206 emacs_backtrace (int backtrace_limit
)
2208 void *main_backtrace_buffer
[BACKTRACE_LIMIT_MAX
+ 1];
2209 int bounded_limit
= min (backtrace_limit
, BACKTRACE_LIMIT_MAX
);
2213 if (thread_backtrace_npointers
)
2215 buffer
= thread_backtrace_buffer
;
2216 npointers
= thread_backtrace_npointers
;
2220 buffer
= main_backtrace_buffer
;
2222 /* Work around 'backtrace' bug; see Bug#19959 and glibc bug#18084. */
2223 if (bounded_limit
< 0)
2225 backtrace (buffer
, 1);
2229 npointers
= backtrace (buffer
, bounded_limit
+ 1);
2234 emacs_write (STDERR_FILENO
, "\nBacktrace:\n", 12);
2235 backtrace_symbols_fd (buffer
, npointers
, STDERR_FILENO
);
2236 if (bounded_limit
< npointers
)
2237 emacs_write (STDERR_FILENO
, "...\n", 4);
2245 terminate_due_to_signal (SIGABRT
, 40);
2249 /* Open FILE for Emacs use, using open flags OFLAG and mode MODE.
2250 Use binary I/O on systems that care about text vs binary I/O.
2251 Arrange for subprograms to not inherit the file descriptor.
2252 Prefer a method that is multithread-safe, if available.
2253 Do not fail merely because the open was interrupted by a signal.
2254 Allow the user to quit. */
2257 emacs_open (const char *file
, int oflags
, int mode
)
2260 if (! (oflags
& O_TEXT
))
2262 oflags
|= O_CLOEXEC
;
2263 while ((fd
= open (file
, oflags
, mode
)) < 0 && errno
== EINTR
)
2265 if (! O_CLOEXEC
&& 0 <= fd
)
2266 fcntl (fd
, F_SETFD
, FD_CLOEXEC
);
2270 /* Open FILE as a stream for Emacs use, with mode MODE.
2271 Act like emacs_open with respect to threads, signals, and quits. */
2274 emacs_fopen (char const *file
, char const *mode
)
2276 int fd
, omode
, oflags
;
2278 char const *m
= mode
;
2282 case 'r': omode
= O_RDONLY
; oflags
= 0; break;
2283 case 'w': omode
= O_WRONLY
; oflags
= O_CREAT
| O_TRUNC
; break;
2284 case 'a': omode
= O_WRONLY
; oflags
= O_CREAT
| O_APPEND
; break;
2285 default: emacs_abort ();
2291 case '+': omode
= O_RDWR
; break;
2292 case 'b': bflag
= O_BINARY
; break;
2293 case 't': bflag
= O_TEXT
; break;
2294 default: /* Ignore. */ break;
2297 fd
= emacs_open (file
, omode
| oflags
| bflag
, 0666);
2298 return fd
< 0 ? 0 : fdopen (fd
, mode
);
2301 /* Create a pipe for Emacs use. */
2304 emacs_pipe (int fd
[2])
2309 int result
= pipe2 (fd
, O_BINARY
| O_CLOEXEC
);
2310 if (! O_CLOEXEC
&& result
== 0)
2312 fcntl (fd
[0], F_SETFD
, FD_CLOEXEC
);
2313 fcntl (fd
[1], F_SETFD
, FD_CLOEXEC
);
2319 /* Approximate posix_close and POSIX_CLOSE_RESTART well enough for Emacs.
2320 For the background behind this mess, please see Austin Group defect 529
2321 <http://austingroupbugs.net/view.php?id=529>. */
2323 #ifndef POSIX_CLOSE_RESTART
2324 # define POSIX_CLOSE_RESTART 1
2326 posix_close (int fd
, int flag
)
2328 /* Only the POSIX_CLOSE_RESTART case is emulated. */
2329 eassert (flag
== POSIX_CLOSE_RESTART
);
2331 /* Things are tricky if close (fd) returns -1 with errno == EINTR
2332 on a system that does not define POSIX_CLOSE_RESTART.
2334 In this case, in some systems (e.g., GNU/Linux, AIX) FD is
2335 closed, and retrying the close could inadvertently close a file
2336 descriptor allocated by some other thread. In other systems
2337 (e.g., HP/UX) FD is not closed. And in still other systems
2338 (e.g., OS X, Solaris), maybe FD is closed, maybe not, and in a
2339 multithreaded program there can be no way to tell.
2341 So, in this case, pretend that the close succeeded. This works
2342 well on systems like GNU/Linux that close FD. Although it may
2343 leak a file descriptor on other systems, the leak is unlikely and
2344 it's better to leak than to close a random victim. */
2345 return close (fd
) == 0 || errno
== EINTR
? 0 : -1;
2349 /* Close FD, retrying if interrupted. If successful, return 0;
2350 otherwise, return -1 and set errno to a non-EINTR value. Consider
2351 an EINPROGRESS error to be successful, as that's merely a signal
2352 arriving. FD is always closed when this function returns, even
2355 Do not call this function if FD is nonnegative and might already be closed,
2356 as that might close an innocent victim opened by some other thread. */
2359 emacs_close (int fd
)
2363 int r
= posix_close (fd
, POSIX_CLOSE_RESTART
);
2366 if (!POSIX_CLOSE_RESTART
|| errno
!= EINTR
)
2368 eassert (errno
!= EBADF
|| fd
< 0);
2369 return errno
== EINPROGRESS
? 0 : r
;
2374 /* Maximum number of bytes to read or write in a single system call.
2375 This works around a serious bug in Linux kernels before 2.6.16; see
2376 <https://bugzilla.redhat.com/show_bug.cgi?format=multiple&id=612839>.
2377 It's likely to work around similar bugs in other operating systems, so do it
2378 on all platforms. Round INT_MAX down to a page size, with the conservative
2379 assumption that page sizes are at most 2**18 bytes (any kernel with a
2380 page size larger than that shouldn't have the bug). */
2381 #ifndef MAX_RW_COUNT
2382 #define MAX_RW_COUNT (INT_MAX >> 18 << 18)
2385 /* Read from FILEDESC to a buffer BUF with size NBYTE, retrying if interrupted.
2386 Return the number of bytes read, which might be less than NBYTE.
2387 On error, set errno and return -1. */
2389 emacs_read (int fildes
, void *buf
, ptrdiff_t nbyte
)
2393 /* There is no need to check against MAX_RW_COUNT, since no caller ever
2394 passes a size that large to emacs_read. */
2396 while ((rtnval
= read (fildes
, buf
, nbyte
)) == -1
2397 && (errno
== EINTR
))
2402 /* Write to FILEDES from a buffer BUF with size NBYTE, retrying if interrupted
2403 or if a partial write occurs. If interrupted, process pending
2404 signals if PROCESS SIGNALS. Return the number of bytes written, setting
2405 errno if this is less than NBYTE. */
2407 emacs_full_write (int fildes
, char const *buf
, ptrdiff_t nbyte
,
2408 bool process_signals
)
2410 ptrdiff_t bytes_written
= 0;
2414 ssize_t n
= write (fildes
, buf
, min (nbyte
, MAX_RW_COUNT
));
2420 /* I originally used `QUIT' but that might cause files to
2421 be truncated if you hit C-g in the middle of it. --Stef */
2422 if (process_signals
&& pending_signals
)
2423 process_pending_signals ();
2435 return bytes_written
;
2438 /* Write to FILEDES from a buffer BUF with size NBYTE, retrying if
2439 interrupted or if a partial write occurs. Return the number of
2440 bytes written, setting errno if this is less than NBYTE. */
2442 emacs_write (int fildes
, void const *buf
, ptrdiff_t nbyte
)
2444 return emacs_full_write (fildes
, buf
, nbyte
, 0);
2447 /* Like emacs_write, but also process pending signals if interrupted. */
2449 emacs_write_sig (int fildes
, void const *buf
, ptrdiff_t nbyte
)
2451 return emacs_full_write (fildes
, buf
, nbyte
, 1);
2454 /* Write a diagnostic to standard error that contains MESSAGE and a
2455 string derived from errno. Preserve errno. Do not buffer stderr.
2456 Do not process pending signals if interrupted. */
2458 emacs_perror (char const *message
)
2461 char const *error_string
= strerror (err
);
2462 char const *command
= (initial_argv
&& initial_argv
[0]
2463 ? initial_argv
[0] : "emacs");
2464 /* Write it out all at once, if it's short; this is less likely to
2465 be interleaved with other output. */
2467 int nbytes
= snprintf (buf
, sizeof buf
, "%s: %s: %s\n",
2468 command
, message
, error_string
);
2469 if (0 <= nbytes
&& nbytes
< BUFSIZ
)
2470 emacs_write (STDERR_FILENO
, buf
, nbytes
);
2473 emacs_write (STDERR_FILENO
, command
, strlen (command
));
2474 emacs_write (STDERR_FILENO
, ": ", 2);
2475 emacs_write (STDERR_FILENO
, message
, strlen (message
));
2476 emacs_write (STDERR_FILENO
, ": ", 2);
2477 emacs_write (STDERR_FILENO
, error_string
, strlen (error_string
));
2478 emacs_write (STDERR_FILENO
, "\n", 1);
2483 /* Return a struct timeval that is roughly equivalent to T.
2484 Use the least timeval not less than T.
2485 Return an extremal value if the result would overflow. */
2487 make_timeval (struct timespec t
)
2490 tv
.tv_sec
= t
.tv_sec
;
2491 tv
.tv_usec
= t
.tv_nsec
/ 1000;
2493 if (t
.tv_nsec
% 1000 != 0)
2495 if (tv
.tv_usec
< 999999)
2497 else if (tv
.tv_sec
< TYPE_MAXIMUM (time_t))
2507 /* Set the access and modification time stamps of FD (a.k.a. FILE) to be
2508 ATIME and MTIME, respectively.
2509 FD must be either negative -- in which case it is ignored --
2510 or a file descriptor that is open on FILE.
2511 If FD is nonnegative, then FILE can be NULL. */
2513 set_file_times (int fd
, const char *filename
,
2514 struct timespec atime
, struct timespec mtime
)
2516 struct timespec timespec
[2];
2517 timespec
[0] = atime
;
2518 timespec
[1] = mtime
;
2519 return fdutimens (fd
, filename
, timespec
);
2522 /* Like strsignal, except async-signal-safe, and this function typically
2523 returns a string in the C locale rather than the current locale. */
2525 safe_strsignal (int code
)
2527 char const *signame
= 0;
2529 if (0 <= code
&& code
< sys_siglist_entries
)
2530 signame
= sys_siglist
[code
];
2532 signame
= "Unknown signal";
2538 /* For make-serial-process */
2540 serial_open (Lisp_Object port
)
2542 int fd
= emacs_open (SSDATA (port
), O_RDWR
| O_NOCTTY
| O_NONBLOCK
, 0);
2544 report_file_error ("Opening serial port", port
);
2546 ioctl (fd
, TIOCEXCL
, (char *) 0);
2552 #if !defined (HAVE_CFMAKERAW)
2553 /* Workaround for targets which are missing cfmakeraw. */
2554 /* Pasted from man page. */
2556 cfmakeraw (struct termios
*termios_p
)
2558 termios_p
->c_iflag
&= ~(IGNBRK
|BRKINT
|PARMRK
|ISTRIP
|INLCR
|IGNCR
|ICRNL
|IXON
);
2559 termios_p
->c_oflag
&= ~OPOST
;
2560 termios_p
->c_lflag
&= ~(ECHO
|ECHONL
|ICANON
|ISIG
|IEXTEN
);
2561 termios_p
->c_cflag
&= ~(CSIZE
|PARENB
);
2562 termios_p
->c_cflag
|= CS8
;
2564 #endif /* !defined (HAVE_CFMAKERAW */
2566 #if !defined (HAVE_CFSETSPEED)
2567 /* Workaround for targets which are missing cfsetspeed. */
2569 cfsetspeed (struct termios
*termios_p
, speed_t vitesse
)
2571 return (cfsetispeed (termios_p
, vitesse
)
2572 + cfsetospeed (termios_p
, vitesse
));
2576 /* For serial-process-configure */
2578 serial_configure (struct Lisp_Process
*p
,
2579 Lisp_Object contact
)
2581 Lisp_Object childp2
= Qnil
;
2582 Lisp_Object tem
= Qnil
;
2583 struct termios attr
;
2585 char summary
[4] = "???"; /* This usually becomes "8N1". */
2587 childp2
= Fcopy_sequence (p
->childp
);
2589 /* Read port attributes and prepare default configuration. */
2590 err
= tcgetattr (p
->outfd
, &attr
);
2592 report_file_error ("Failed tcgetattr", Qnil
);
2594 #if defined (CLOCAL)
2595 attr
.c_cflag
|= CLOCAL
;
2598 attr
.c_cflag
|= CREAD
;
2601 /* Configure speed. */
2602 if (!NILP (Fplist_member (contact
, QCspeed
)))
2603 tem
= Fplist_get (contact
, QCspeed
);
2605 tem
= Fplist_get (p
->childp
, QCspeed
);
2607 err
= cfsetspeed (&attr
, XINT (tem
));
2609 report_file_error ("Failed cfsetspeed", tem
);
2610 childp2
= Fplist_put (childp2
, QCspeed
, tem
);
2612 /* Configure bytesize. */
2613 if (!NILP (Fplist_member (contact
, QCbytesize
)))
2614 tem
= Fplist_get (contact
, QCbytesize
);
2616 tem
= Fplist_get (p
->childp
, QCbytesize
);
2618 tem
= make_number (8);
2620 if (XINT (tem
) != 7 && XINT (tem
) != 8)
2621 error (":bytesize must be nil (8), 7, or 8");
2622 summary
[0] = XINT (tem
) + '0';
2623 #if defined (CSIZE) && defined (CS7) && defined (CS8)
2624 attr
.c_cflag
&= ~CSIZE
;
2625 attr
.c_cflag
|= ((XINT (tem
) == 7) ? CS7
: CS8
);
2627 /* Don't error on bytesize 8, which should be set by cfmakeraw. */
2628 if (XINT (tem
) != 8)
2629 error ("Bytesize cannot be changed");
2631 childp2
= Fplist_put (childp2
, QCbytesize
, tem
);
2633 /* Configure parity. */
2634 if (!NILP (Fplist_member (contact
, QCparity
)))
2635 tem
= Fplist_get (contact
, QCparity
);
2637 tem
= Fplist_get (p
->childp
, QCparity
);
2638 if (!NILP (tem
) && !EQ (tem
, Qeven
) && !EQ (tem
, Qodd
))
2639 error (":parity must be nil (no parity), `even', or `odd'");
2640 #if defined (PARENB) && defined (PARODD) && defined (IGNPAR) && defined (INPCK)
2641 attr
.c_cflag
&= ~(PARENB
| PARODD
);
2642 attr
.c_iflag
&= ~(IGNPAR
| INPCK
);
2647 else if (EQ (tem
, Qeven
))
2650 attr
.c_cflag
|= PARENB
;
2651 attr
.c_iflag
|= (IGNPAR
| INPCK
);
2653 else if (EQ (tem
, Qodd
))
2656 attr
.c_cflag
|= (PARENB
| PARODD
);
2657 attr
.c_iflag
|= (IGNPAR
| INPCK
);
2660 /* Don't error on no parity, which should be set by cfmakeraw. */
2662 error ("Parity cannot be configured");
2664 childp2
= Fplist_put (childp2
, QCparity
, tem
);
2666 /* Configure stopbits. */
2667 if (!NILP (Fplist_member (contact
, QCstopbits
)))
2668 tem
= Fplist_get (contact
, QCstopbits
);
2670 tem
= Fplist_get (p
->childp
, QCstopbits
);
2672 tem
= make_number (1);
2674 if (XINT (tem
) != 1 && XINT (tem
) != 2)
2675 error (":stopbits must be nil (1 stopbit), 1, or 2");
2676 summary
[2] = XINT (tem
) + '0';
2677 #if defined (CSTOPB)
2678 attr
.c_cflag
&= ~CSTOPB
;
2679 if (XINT (tem
) == 2)
2680 attr
.c_cflag
|= CSTOPB
;
2682 /* Don't error on 1 stopbit, which should be set by cfmakeraw. */
2683 if (XINT (tem
) != 1)
2684 error ("Stopbits cannot be configured");
2686 childp2
= Fplist_put (childp2
, QCstopbits
, tem
);
2688 /* Configure flowcontrol. */
2689 if (!NILP (Fplist_member (contact
, QCflowcontrol
)))
2690 tem
= Fplist_get (contact
, QCflowcontrol
);
2692 tem
= Fplist_get (p
->childp
, QCflowcontrol
);
2693 if (!NILP (tem
) && !EQ (tem
, Qhw
) && !EQ (tem
, Qsw
))
2694 error (":flowcontrol must be nil (no flowcontrol), `hw', or `sw'");
2695 #if defined (CRTSCTS)
2696 attr
.c_cflag
&= ~CRTSCTS
;
2698 #if defined (CNEW_RTSCTS)
2699 attr
.c_cflag
&= ~CNEW_RTSCTS
;
2701 #if defined (IXON) && defined (IXOFF)
2702 attr
.c_iflag
&= ~(IXON
| IXOFF
);
2706 /* Already configured. */
2708 else if (EQ (tem
, Qhw
))
2710 #if defined (CRTSCTS)
2711 attr
.c_cflag
|= CRTSCTS
;
2712 #elif defined (CNEW_RTSCTS)
2713 attr
.c_cflag
|= CNEW_RTSCTS
;
2715 error ("Hardware flowcontrol (RTS/CTS) not supported");
2718 else if (EQ (tem
, Qsw
))
2720 #if defined (IXON) && defined (IXOFF)
2721 attr
.c_iflag
|= (IXON
| IXOFF
);
2723 error ("Software flowcontrol (XON/XOFF) not supported");
2726 childp2
= Fplist_put (childp2
, QCflowcontrol
, tem
);
2728 /* Activate configuration. */
2729 err
= tcsetattr (p
->outfd
, TCSANOW
, &attr
);
2731 report_file_error ("Failed tcsetattr", Qnil
);
2733 childp2
= Fplist_put (childp2
, QCsummary
, build_string (summary
));
2734 pset_childp (p
, childp2
);
2736 #endif /* not DOS_NT */
2738 /* System depended enumeration of and access to system processes a-la ps(1). */
2742 /* Process enumeration and access via /proc. */
2745 list_system_processes (void)
2747 Lisp_Object procdir
, match
, proclist
, next
;
2750 /* For every process on the system, there's a directory in the
2751 "/proc" pseudo-directory whose name is the numeric ID of that
2753 procdir
= build_string ("/proc");
2754 match
= build_string ("[0-9]+");
2755 proclist
= directory_files_internal (procdir
, Qnil
, match
, Qt
, 0, Qnil
);
2757 /* `proclist' gives process IDs as strings. Destructively convert
2758 each string into a number. */
2759 for (tail
= proclist
; CONSP (tail
); tail
= next
)
2762 XSETCAR (tail
, Fstring_to_number (XCAR (tail
), Qnil
));
2765 /* directory_files_internal returns the files in reverse order; undo
2767 proclist
= Fnreverse (proclist
);
2771 #elif defined DARWIN_OS || defined __FreeBSD__
2774 list_system_processes (void)
2777 int mib
[] = {CTL_KERN
, KERN_PROC
, KERN_PROC_ALL
};
2779 int mib
[] = {CTL_KERN
, KERN_PROC
, KERN_PROC_PROC
};
2782 struct kinfo_proc
*procs
;
2785 Lisp_Object proclist
= Qnil
;
2787 if (sysctl (mib
, 3, NULL
, &len
, NULL
, 0) != 0)
2790 procs
= xmalloc (len
);
2791 if (sysctl (mib
, 3, procs
, &len
, NULL
, 0) != 0)
2797 len
/= sizeof (struct kinfo_proc
);
2798 for (i
= 0; i
< len
; i
++)
2801 proclist
= Fcons (make_fixnum_or_float (procs
[i
].kp_proc
.p_pid
), proclist
);
2803 proclist
= Fcons (make_fixnum_or_float (procs
[i
].ki_pid
), proclist
);
2812 /* The WINDOWSNT implementation is in w32.c.
2813 The MSDOS implementation is in dosfns.c. */
2814 #elif !defined (WINDOWSNT) && !defined (MSDOS)
2817 list_system_processes (void)
2822 #endif /* !defined (WINDOWSNT) */
2824 #if defined GNU_LINUX && defined HAVE_LONG_LONG_INT
2825 static struct timespec
2826 time_from_jiffies (unsigned long long tval
, long hz
)
2828 unsigned long long s
= tval
/ hz
;
2829 unsigned long long frac
= tval
% hz
;
2832 if (TYPE_MAXIMUM (time_t) < s
)
2834 if (LONG_MAX
- 1 <= ULLONG_MAX
/ TIMESPEC_RESOLUTION
2835 || frac
<= ULLONG_MAX
/ TIMESPEC_RESOLUTION
)
2836 ns
= frac
* TIMESPEC_RESOLUTION
/ hz
;
2839 /* This is reachable only in the unlikely case that HZ * HZ
2840 exceeds ULLONG_MAX. It calculates an approximation that is
2841 guaranteed to be in range. */
2842 long hz_per_ns
= (hz
/ TIMESPEC_RESOLUTION
2843 + (hz
% TIMESPEC_RESOLUTION
!= 0));
2844 ns
= frac
/ hz_per_ns
;
2847 return make_timespec (s
, ns
);
2851 ltime_from_jiffies (unsigned long long tval
, long hz
)
2853 struct timespec t
= time_from_jiffies (tval
, hz
);
2854 return make_lisp_time (t
);
2857 static struct timespec
2861 struct timespec up
= make_timespec (0, 0);
2864 fup
= emacs_fopen ("/proc/uptime", "r");
2868 unsigned long long upsec
, upfrac
, idlesec
, idlefrac
;
2869 int upfrac_start
, upfrac_end
, idlefrac_start
, idlefrac_end
;
2871 if (fscanf (fup
, "%llu.%n%llu%n %llu.%n%llu%n",
2872 &upsec
, &upfrac_start
, &upfrac
, &upfrac_end
,
2873 &idlesec
, &idlefrac_start
, &idlefrac
, &idlefrac_end
)
2876 if (TYPE_MAXIMUM (time_t) < upsec
)
2878 upsec
= TYPE_MAXIMUM (time_t);
2879 upfrac
= TIMESPEC_RESOLUTION
- 1;
2883 int upfraclen
= upfrac_end
- upfrac_start
;
2884 for (; upfraclen
< LOG10_TIMESPEC_RESOLUTION
; upfraclen
++)
2886 for (; LOG10_TIMESPEC_RESOLUTION
< upfraclen
; upfraclen
--)
2888 upfrac
= min (upfrac
, TIMESPEC_RESOLUTION
- 1);
2890 up
= make_timespec (upsec
, upfrac
);
2899 #define MAJOR(d) (((unsigned)(d) >> 8) & 0xfff)
2900 #define MINOR(d) (((unsigned)(d) & 0xff) | (((unsigned)(d) & 0xfff00000) >> 12))
2903 procfs_ttyname (int rdev
)
2906 char name
[PATH_MAX
];
2909 fdev
= emacs_fopen ("/proc/tty/drivers", "r");
2915 unsigned long minor_beg
, minor_end
;
2916 char minor
[25]; /* 2 32-bit numbers + dash */
2919 for (; !feof (fdev
) && !ferror (fdev
); name
[0] = 0)
2921 if (fscanf (fdev
, "%*s %s %u %s %*s\n", name
, &major
, minor
) >= 3
2922 && major
== MAJOR (rdev
))
2924 minor_beg
= strtoul (minor
, &endp
, 0);
2926 minor_end
= minor_beg
;
2927 else if (*endp
== '-')
2928 minor_end
= strtoul (endp
+ 1, &endp
, 0);
2932 if (MINOR (rdev
) >= minor_beg
&& MINOR (rdev
) <= minor_end
)
2934 sprintf (name
+ strlen (name
), "%u", MINOR (rdev
));
2942 return build_string (name
);
2946 procfs_get_total_memory (void)
2949 uintmax_t retval
= 2 * 1024 * 1024; /* default: 2 GiB */
2953 fmem
= emacs_fopen ("/proc/meminfo", "r");
2957 uintmax_t entry_value
;
2961 switch (fscanf (fmem
, "MemTotal: %"SCNuMAX
, &entry_value
))
2964 retval
= entry_value
;
2969 while ((c
= getc (fmem
)) != EOF
&& c
!= '\n')
2987 system_process_attributes (Lisp_Object pid
)
2989 char procfn
[PATH_MAX
], fn
[PATH_MAX
];
2993 long clocks_per_sec
;
2995 char procbuf
[1025], *p
, *q
;
2998 static char const default_cmd
[] = "???";
2999 const char *cmd
= default_cmd
;
3000 int cmdsize
= sizeof default_cmd
- 1;
3001 char *cmdline
= NULL
;
3002 ptrdiff_t cmdline_size
;
3005 int ppid
, pgrp
, sess
, tty
, tpgid
, thcount
;
3008 unsigned long long u_time
, s_time
, cutime
, cstime
, start
;
3009 long priority
, niceness
, rss
;
3010 unsigned long minflt
, majflt
, cminflt
, cmajflt
, vsize
;
3011 struct timespec tnow
, tstart
, tboot
, telapsed
, us_time
;
3013 Lisp_Object attrs
= Qnil
;
3014 Lisp_Object cmd_str
, decoded_cmd
;
3017 CHECK_NUMBER_OR_FLOAT (pid
);
3018 CONS_TO_INTEGER (pid
, pid_t
, proc_id
);
3019 sprintf (procfn
, "/proc/%"pMd
, proc_id
);
3020 if (stat (procfn
, &st
) < 0)
3025 attrs
= Fcons (Fcons (Qeuid
, make_fixnum_or_float (uid
)), attrs
);
3027 pw
= getpwuid (uid
);
3030 attrs
= Fcons (Fcons (Quser
, build_string (pw
->pw_name
)), attrs
);
3033 attrs
= Fcons (Fcons (Qegid
, make_fixnum_or_float (gid
)), attrs
);
3035 gr
= getgrgid (gid
);
3038 attrs
= Fcons (Fcons (Qgroup
, build_string (gr
->gr_name
)), attrs
);
3040 count
= SPECPDL_INDEX ();
3041 strcpy (fn
, procfn
);
3042 procfn_end
= fn
+ strlen (fn
);
3043 strcpy (procfn_end
, "/stat");
3044 fd
= emacs_open (fn
, O_RDONLY
, 0);
3049 record_unwind_protect_int (close_file_unwind
, fd
);
3050 nread
= emacs_read (fd
, procbuf
, sizeof procbuf
- 1);
3054 procbuf
[nread
] = '\0';
3057 p
= strchr (p
, '(');
3060 q
= strrchr (p
+ 1, ')');
3070 /* Command name is encoded in locale-coding-system; decode it. */
3071 cmd_str
= make_unibyte_string (cmd
, cmdsize
);
3072 decoded_cmd
= code_convert_string_norecord (cmd_str
,
3073 Vlocale_coding_system
, 0);
3074 attrs
= Fcons (Fcons (Qcomm
, decoded_cmd
), attrs
);
3076 /* state ppid pgrp sess tty tpgid . minflt cminflt majflt cmajflt
3077 utime stime cutime cstime priority nice thcount . start vsize rss */
3079 && (sscanf (q
+ 2, ("%c %d %d %d %d %d %*u %lu %lu %lu %lu "
3080 "%Lu %Lu %Lu %Lu %ld %ld %d %*d %Lu %lu %ld"),
3081 &c
, &ppid
, &pgrp
, &sess
, &tty
, &tpgid
,
3082 &minflt
, &cminflt
, &majflt
, &cmajflt
,
3083 &u_time
, &s_time
, &cutime
, &cstime
,
3084 &priority
, &niceness
, &thcount
, &start
, &vsize
, &rss
)
3089 state_str
[1] = '\0';
3090 attrs
= Fcons (Fcons (Qstate
, build_string (state_str
)), attrs
);
3091 attrs
= Fcons (Fcons (Qppid
, make_fixnum_or_float (ppid
)), attrs
);
3092 attrs
= Fcons (Fcons (Qpgrp
, make_fixnum_or_float (pgrp
)), attrs
);
3093 attrs
= Fcons (Fcons (Qsess
, make_fixnum_or_float (sess
)), attrs
);
3094 attrs
= Fcons (Fcons (Qttname
, procfs_ttyname (tty
)), attrs
);
3095 attrs
= Fcons (Fcons (Qtpgid
, make_fixnum_or_float (tpgid
)), attrs
);
3096 attrs
= Fcons (Fcons (Qminflt
, make_fixnum_or_float (minflt
)), attrs
);
3097 attrs
= Fcons (Fcons (Qmajflt
, make_fixnum_or_float (majflt
)), attrs
);
3098 attrs
= Fcons (Fcons (Qcminflt
, make_fixnum_or_float (cminflt
)),
3100 attrs
= Fcons (Fcons (Qcmajflt
, make_fixnum_or_float (cmajflt
)),
3102 clocks_per_sec
= sysconf (_SC_CLK_TCK
);
3103 if (clocks_per_sec
< 0)
3104 clocks_per_sec
= 100;
3105 attrs
= Fcons (Fcons (Qutime
,
3106 ltime_from_jiffies (u_time
, clocks_per_sec
)),
3108 attrs
= Fcons (Fcons (Qstime
,
3109 ltime_from_jiffies (s_time
, clocks_per_sec
)),
3111 attrs
= Fcons (Fcons (Qtime
,
3112 ltime_from_jiffies (s_time
+ u_time
,
3115 attrs
= Fcons (Fcons (Qcutime
,
3116 ltime_from_jiffies (cutime
, clocks_per_sec
)),
3118 attrs
= Fcons (Fcons (Qcstime
,
3119 ltime_from_jiffies (cstime
, clocks_per_sec
)),
3121 attrs
= Fcons (Fcons (Qctime
,
3122 ltime_from_jiffies (cstime
+ cutime
,
3125 attrs
= Fcons (Fcons (Qpri
, make_number (priority
)), attrs
);
3126 attrs
= Fcons (Fcons (Qnice
, make_number (niceness
)), attrs
);
3127 attrs
= Fcons (Fcons (Qthcount
, make_fixnum_or_float (thcount
)),
3129 tnow
= current_timespec ();
3130 telapsed
= get_up_time ();
3131 tboot
= timespec_sub (tnow
, telapsed
);
3132 tstart
= time_from_jiffies (start
, clocks_per_sec
);
3133 tstart
= timespec_add (tboot
, tstart
);
3134 attrs
= Fcons (Fcons (Qstart
, make_lisp_time (tstart
)), attrs
);
3135 attrs
= Fcons (Fcons (Qvsize
, make_fixnum_or_float (vsize
/ 1024)),
3137 attrs
= Fcons (Fcons (Qrss
, make_fixnum_or_float (4 * rss
)), attrs
);
3138 telapsed
= timespec_sub (tnow
, tstart
);
3139 attrs
= Fcons (Fcons (Qetime
, make_lisp_time (telapsed
)), attrs
);
3140 us_time
= time_from_jiffies (u_time
+ s_time
, clocks_per_sec
);
3141 pcpu
= timespectod (us_time
) / timespectod (telapsed
);
3144 attrs
= Fcons (Fcons (Qpcpu
, make_float (100 * pcpu
)), attrs
);
3145 pmem
= 4.0 * 100 * rss
/ procfs_get_total_memory ();
3148 attrs
= Fcons (Fcons (Qpmem
, make_float (pmem
)), attrs
);
3151 unbind_to (count
, Qnil
);
3154 strcpy (procfn_end
, "/cmdline");
3155 fd
= emacs_open (fn
, O_RDONLY
, 0);
3158 ptrdiff_t readsize
, nread_incr
;
3159 record_unwind_protect_int (close_file_unwind
, fd
);
3160 record_unwind_protect_nothing ();
3161 nread
= cmdline_size
= 0;
3165 cmdline
= xpalloc (cmdline
, &cmdline_size
, 2, STRING_BYTES_BOUND
, 1);
3166 set_unwind_protect_ptr (count
+ 1, xfree
, cmdline
);
3168 /* Leave room even if every byte needs escaping below. */
3169 readsize
= (cmdline_size
>> 1) - nread
;
3171 nread_incr
= emacs_read (fd
, cmdline
+ nread
, readsize
);
3172 nread
+= max (0, nread_incr
);
3174 while (nread_incr
== readsize
);
3178 /* We don't want trailing null characters. */
3179 for (p
= cmdline
+ nread
; cmdline
< p
&& !p
[-1]; p
--)
3182 /* Escape-quote whitespace and backslashes. */
3183 q
= cmdline
+ cmdline_size
;
3188 if (c_isspace (c
) || c
== '\\')
3192 nread
= cmdline
+ cmdline_size
- q
;
3197 nread
= cmdsize
+ 2;
3198 cmdline_size
= nread
+ 1;
3199 q
= cmdline
= xrealloc (cmdline
, cmdline_size
);
3200 set_unwind_protect_ptr (count
+ 1, xfree
, cmdline
);
3201 sprintf (cmdline
, "[%.*s]", cmdsize
, cmd
);
3203 /* Command line is encoded in locale-coding-system; decode it. */
3204 cmd_str
= make_unibyte_string (q
, nread
);
3205 decoded_cmd
= code_convert_string_norecord (cmd_str
,
3206 Vlocale_coding_system
, 0);
3207 unbind_to (count
, Qnil
);
3208 attrs
= Fcons (Fcons (Qargs
, decoded_cmd
), attrs
);
3214 #elif defined (SOLARIS2) && defined (HAVE_PROCFS)
3216 /* The <procfs.h> header does not like to be included if _LP64 is defined and
3217 __FILE_OFFSET_BITS == 64. This is an ugly workaround that. */
3218 #if !defined (_LP64) && defined (_FILE_OFFSET_BITS) && (_FILE_OFFSET_BITS == 64)
3219 #define PROCFS_FILE_OFFSET_BITS_HACK 1
3220 #undef _FILE_OFFSET_BITS
3222 #define PROCFS_FILE_OFFSET_BITS_HACK 0
3227 #if PROCFS_FILE_OFFSET_BITS_HACK == 1
3228 #define _FILE_OFFSET_BITS 64
3229 #ifdef _FILE_OFFSET_BITS /* Avoid unused-macro warnings. */
3231 #endif /* PROCFS_FILE_OFFSET_BITS_HACK == 1 */
3234 system_process_attributes (Lisp_Object pid
)
3236 char procfn
[PATH_MAX
], fn
[PATH_MAX
];
3241 struct psinfo pinfo
;
3247 Lisp_Object attrs
= Qnil
;
3248 Lisp_Object decoded_cmd
;
3251 CHECK_NUMBER_OR_FLOAT (pid
);
3252 CONS_TO_INTEGER (pid
, pid_t
, proc_id
);
3253 sprintf (procfn
, "/proc/%"pMd
, proc_id
);
3254 if (stat (procfn
, &st
) < 0)
3259 attrs
= Fcons (Fcons (Qeuid
, make_fixnum_or_float (uid
)), attrs
);
3261 pw
= getpwuid (uid
);
3264 attrs
= Fcons (Fcons (Quser
, build_string (pw
->pw_name
)), attrs
);
3267 attrs
= Fcons (Fcons (Qegid
, make_fixnum_or_float (gid
)), attrs
);
3269 gr
= getgrgid (gid
);
3272 attrs
= Fcons (Fcons (Qgroup
, build_string (gr
->gr_name
)), attrs
);
3274 count
= SPECPDL_INDEX ();
3275 strcpy (fn
, procfn
);
3276 procfn_end
= fn
+ strlen (fn
);
3277 strcpy (procfn_end
, "/psinfo");
3278 fd
= emacs_open (fn
, O_RDONLY
, 0);
3283 record_unwind_protect (close_file_unwind
, fd
);
3284 nread
= emacs_read (fd
, &pinfo
, sizeof pinfo
);
3287 if (nread
== sizeof pinfo
)
3289 attrs
= Fcons (Fcons (Qppid
, make_fixnum_or_float (pinfo
.pr_ppid
)), attrs
);
3290 attrs
= Fcons (Fcons (Qpgrp
, make_fixnum_or_float (pinfo
.pr_pgid
)), attrs
);
3291 attrs
= Fcons (Fcons (Qsess
, make_fixnum_or_float (pinfo
.pr_sid
)), attrs
);
3295 state_str
[0] = pinfo
.pr_lwp
.pr_sname
;
3296 state_str
[1] = '\0';
3297 attrs
= Fcons (Fcons (Qstate
, build_string (state_str
)), attrs
);
3300 /* FIXME: missing Qttyname. psinfo.pr_ttydev is a dev_t,
3301 need to get a string from it. */
3303 /* FIXME: missing: Qtpgid */
3315 Are they available? */
3317 attrs
= Fcons (Fcons (Qtime
, make_lisp_time (pinfo
.pr_time
)), attrs
);
3318 attrs
= Fcons (Fcons (Qctime
, make_lisp_time (pinfo
.pr_ctime
)), attrs
);
3319 attrs
= Fcons (Fcons (Qpri
, make_number (pinfo
.pr_lwp
.pr_pri
)), attrs
);
3320 attrs
= Fcons (Fcons (Qnice
, make_number (pinfo
.pr_lwp
.pr_nice
)), attrs
);
3321 attrs
= Fcons (Fcons (Qthcount
, make_fixnum_or_float (pinfo
.pr_nlwp
)),
3324 attrs
= Fcons (Fcons (Qstart
, make_lisp_time (pinfo
.pr_start
)), attrs
);
3325 attrs
= Fcons (Fcons (Qvsize
, make_fixnum_or_float (pinfo
.pr_size
)),
3327 attrs
= Fcons (Fcons (Qrss
, make_fixnum_or_float (pinfo
.pr_rssize
)),
3330 /* pr_pctcpu and pr_pctmem are unsigned integers in the
3331 range 0 .. 2**15, representing 0.0 .. 1.0. */
3332 attrs
= Fcons (Fcons (Qpcpu
,
3333 make_float (100.0 / 0x8000 * pinfo
.pr_pctcpu
)),
3335 attrs
= Fcons (Fcons (Qpmem
,
3336 make_float (100.0 / 0x8000 * pinfo
.pr_pctmem
)),
3339 decoded_cmd
= (code_convert_string_norecord
3340 (build_unibyte_string (pinfo
.pr_fname
),
3341 Vlocale_coding_system
, 0));
3342 attrs
= Fcons (Fcons (Qcomm
, decoded_cmd
), attrs
);
3343 decoded_cmd
= (code_convert_string_norecord
3344 (build_unibyte_string (pinfo
.pr_psargs
),
3345 Vlocale_coding_system
, 0));
3346 attrs
= Fcons (Fcons (Qargs
, decoded_cmd
), attrs
);
3348 unbind_to (count
, Qnil
);
3352 #elif defined __FreeBSD__
3354 static struct timespec
3355 timeval_to_timespec (struct timeval t
)
3357 return make_timespec (t
.tv_sec
, t
.tv_usec
* 1000);
3361 make_lisp_timeval (struct timeval t
)
3363 return make_lisp_time (timeval_to_timespec (t
));
3367 system_process_attributes (Lisp_Object pid
)
3370 int pagesize
= getpagesize ();
3371 unsigned long npages
;
3377 char args
[MAXPATHLEN
];
3378 struct timespec t
, now
;
3380 int mib
[4] = {CTL_KERN
, KERN_PROC
, KERN_PROC_PID
};
3381 struct kinfo_proc proc
;
3382 size_t proclen
= sizeof proc
;
3384 Lisp_Object attrs
= Qnil
;
3385 Lisp_Object decoded_comm
;
3387 CHECK_NUMBER_OR_FLOAT (pid
);
3388 CONS_TO_INTEGER (pid
, int, proc_id
);
3391 if (sysctl (mib
, 4, &proc
, &proclen
, NULL
, 0) != 0)
3394 attrs
= Fcons (Fcons (Qeuid
, make_fixnum_or_float (proc
.ki_uid
)), attrs
);
3397 pw
= getpwuid (proc
.ki_uid
);
3400 attrs
= Fcons (Fcons (Quser
, build_string (pw
->pw_name
)), attrs
);
3402 attrs
= Fcons (Fcons (Qegid
, make_fixnum_or_float (proc
.ki_svgid
)), attrs
);
3405 gr
= getgrgid (proc
.ki_svgid
);
3408 attrs
= Fcons (Fcons (Qgroup
, build_string (gr
->gr_name
)), attrs
);
3410 decoded_comm
= (code_convert_string_norecord
3411 (build_unibyte_string (proc
.ki_comm
),
3412 Vlocale_coding_system
, 0));
3414 attrs
= Fcons (Fcons (Qcomm
, decoded_comm
), attrs
);
3416 char state
[2] = {'\0', '\0'};
3417 switch (proc
.ki_stat
)
3439 attrs
= Fcons (Fcons (Qstate
, build_string (state
)), attrs
);
3442 attrs
= Fcons (Fcons (Qppid
, make_fixnum_or_float (proc
.ki_ppid
)), attrs
);
3443 attrs
= Fcons (Fcons (Qpgrp
, make_fixnum_or_float (proc
.ki_pgid
)), attrs
);
3444 attrs
= Fcons (Fcons (Qsess
, make_fixnum_or_float (proc
.ki_sid
)), attrs
);
3447 ttyname
= proc
.ki_tdev
== NODEV
? NULL
: devname (proc
.ki_tdev
, S_IFCHR
);
3450 attrs
= Fcons (Fcons (Qtty
, build_string (ttyname
)), attrs
);
3452 attrs
= Fcons (Fcons (Qtpgid
, make_fixnum_or_float (proc
.ki_tpgid
)), attrs
);
3453 attrs
= Fcons (Fcons (Qminflt
, make_fixnum_or_float (proc
.ki_rusage
.ru_minflt
)), attrs
);
3454 attrs
= Fcons (Fcons (Qmajflt
, make_fixnum_or_float (proc
.ki_rusage
.ru_majflt
)), attrs
);
3455 attrs
= Fcons (Fcons (Qcminflt
, make_number (proc
.ki_rusage_ch
.ru_minflt
)), attrs
);
3456 attrs
= Fcons (Fcons (Qcmajflt
, make_number (proc
.ki_rusage_ch
.ru_majflt
)), attrs
);
3458 attrs
= Fcons (Fcons (Qutime
, make_lisp_timeval (proc
.ki_rusage
.ru_utime
)),
3460 attrs
= Fcons (Fcons (Qstime
, make_lisp_timeval (proc
.ki_rusage
.ru_stime
)),
3462 t
= timespec_add (timeval_to_timespec (proc
.ki_rusage
.ru_utime
),
3463 timeval_to_timespec (proc
.ki_rusage
.ru_stime
));
3464 attrs
= Fcons (Fcons (Qtime
, make_lisp_time (t
)), attrs
);
3466 attrs
= Fcons (Fcons (Qcutime
,
3467 make_lisp_timeval (proc
.ki_rusage_ch
.ru_utime
)),
3469 attrs
= Fcons (Fcons (Qcstime
,
3470 make_lisp_timeval (proc
.ki_rusage_ch
.ru_utime
)),
3472 t
= timespec_add (timeval_to_timespec (proc
.ki_rusage_ch
.ru_utime
),
3473 timeval_to_timespec (proc
.ki_rusage_ch
.ru_stime
));
3474 attrs
= Fcons (Fcons (Qctime
, make_lisp_time (t
)), attrs
);
3476 attrs
= Fcons (Fcons (Qthcount
, make_fixnum_or_float (proc
.ki_numthreads
)),
3478 attrs
= Fcons (Fcons (Qpri
, make_number (proc
.ki_pri
.pri_native
)), attrs
);
3479 attrs
= Fcons (Fcons (Qnice
, make_number (proc
.ki_nice
)), attrs
);
3480 attrs
= Fcons (Fcons (Qstart
, make_lisp_timeval (proc
.ki_start
)), attrs
);
3481 attrs
= Fcons (Fcons (Qvsize
, make_number (proc
.ki_size
>> 10)), attrs
);
3482 attrs
= Fcons (Fcons (Qrss
, make_number (proc
.ki_rssize
* pagesize
>> 10)),
3485 now
= current_timespec ();
3486 t
= timespec_sub (now
, timeval_to_timespec (proc
.ki_start
));
3487 attrs
= Fcons (Fcons (Qetime
, make_lisp_time (t
)), attrs
);
3489 len
= sizeof fscale
;
3490 if (sysctlbyname ("kern.fscale", &fscale
, &len
, NULL
, 0) == 0)
3495 if (sysctlbyname ("kern.ccpu", &ccpu
, &len
, NULL
, 0) == 0)
3497 pcpu
= (100.0 * proc
.ki_pctcpu
/ fscale
3498 / (1 - exp (proc
.ki_swtime
* log ((double) ccpu
/ fscale
))));
3499 attrs
= Fcons (Fcons (Qpcpu
, make_fixnum_or_float (pcpu
)), attrs
);
3503 len
= sizeof npages
;
3504 if (sysctlbyname ("hw.availpages", &npages
, &len
, NULL
, 0) == 0)
3506 double pmem
= (proc
.ki_flag
& P_INMEM
3507 ? 100.0 * proc
.ki_rssize
/ npages
3509 attrs
= Fcons (Fcons (Qpmem
, make_fixnum_or_float (pmem
)), attrs
);
3512 mib
[2] = KERN_PROC_ARGS
;
3514 if (sysctl (mib
, 4, args
, &len
, NULL
, 0) == 0)
3517 for (i
= 0; i
< len
; i
++)
3519 if (! args
[i
] && i
< len
- 1)
3524 (code_convert_string_norecord
3525 (build_unibyte_string (args
),
3526 Vlocale_coding_system
, 0));
3528 attrs
= Fcons (Fcons (Qargs
, decoded_comm
), attrs
);
3534 /* The WINDOWSNT implementation is in w32.c.
3535 The MSDOS implementation is in dosfns.c. */
3536 #elif !defined (WINDOWSNT) && !defined (MSDOS)
3539 system_process_attributes (Lisp_Object pid
)
3544 #endif /* !defined (WINDOWSNT) */
3546 /* Wide character string collation. */
3548 #ifdef __STDC_ISO_10646__
3550 # include <wctype.h>
3552 # if defined HAVE_NEWLOCALE || defined HAVE_SETLOCALE
3553 # include <locale.h>
3556 # define LC_COLLATE 0
3558 # ifndef LC_COLLATE_MASK
3559 # define LC_COLLATE_MASK 0
3564 # ifndef LC_CTYPE_MASK
3565 # define LC_CTYPE_MASK 0
3568 # ifndef HAVE_NEWLOCALE
3574 # define freelocale emacs_freelocale
3575 # define locale_t emacs_locale_t
3576 # define newlocale emacs_newlocale
3577 # define wcscoll_l emacs_wcscoll_l
3578 # define towlower_l emacs_towlower_l
3580 typedef char const *locale_t
;
3583 newlocale (int category_mask
, char const *locale
, locale_t loc
)
3589 freelocale (locale_t loc
)
3594 emacs_setlocale (int category
, char const *locale
)
3596 # ifdef HAVE_SETLOCALE
3598 char *loc
= setlocale (category
, locale
);
3609 wcscoll_l (wchar_t const *a
, wchar_t const *b
, locale_t loc
)
3612 char *oldloc
= emacs_setlocale (LC_COLLATE
, NULL
);
3620 char *oldcopy
= SAFE_ALLOCA (strlen (oldloc
) + 1);
3621 strcpy (oldcopy
, oldloc
);
3622 if (! emacs_setlocale (LC_COLLATE
, loc
))
3627 result
= wcscoll (a
, b
);
3629 if (! emacs_setlocale (LC_COLLATE
, oldcopy
))
3640 towlower_l (wint_t wc
, locale_t loc
)
3643 char *oldloc
= emacs_setlocale (LC_CTYPE
, NULL
);
3648 char *oldcopy
= SAFE_ALLOCA (strlen (oldloc
) + 1);
3649 strcpy (oldcopy
, oldloc
);
3650 if (emacs_setlocale (LC_CTYPE
, loc
))
3652 result
= towlower (wc
);
3653 emacs_setlocale (LC_COLLATE
, oldcopy
);
3663 str_collate (Lisp_Object s1
, Lisp_Object s2
,
3664 Lisp_Object locale
, Lisp_Object ignore_case
)
3667 ptrdiff_t len
, i
, i_byte
;
3672 /* Convert byte stream to code points. */
3673 len
= SCHARS (s1
); i
= i_byte
= 0;
3674 SAFE_NALLOCA (p1
, 1, len
+ 1);
3676 FETCH_STRING_CHAR_ADVANCE (*(p1
+i
-1), s1
, i
, i_byte
);
3679 len
= SCHARS (s2
); i
= i_byte
= 0;
3680 SAFE_NALLOCA (p2
, 1, len
+ 1);
3682 FETCH_STRING_CHAR_ADVANCE (*(p2
+i
-1), s2
, i
, i_byte
);
3685 if (STRINGP (locale
))
3687 locale_t loc
= newlocale (LC_COLLATE_MASK
| LC_CTYPE_MASK
,
3688 SSDATA (locale
), 0);
3690 error ("Invalid locale %s: %s", SSDATA (locale
), strerror (errno
));
3692 if (! NILP (ignore_case
))
3693 for (int i
= 1; i
< 3; i
++)
3695 wchar_t *p
= (i
== 1) ? p1
: p2
;
3697 *p
= towlower_l (*p
, loc
);
3701 res
= wcscoll_l (p1
, p2
, loc
);
3707 if (! NILP (ignore_case
))
3708 for (int i
= 1; i
< 3; i
++)
3710 wchar_t *p
= (i
== 1) ? p1
: p2
;
3716 res
= wcscoll (p1
, p2
);
3719 # ifndef HAVE_NEWLOCALE
3721 error ("Invalid locale or string for collation: %s", strerror (err
));
3724 error ("Invalid string for collation: %s", strerror (err
));
3730 #endif /* __STDC_ISO_10646__ */
3734 str_collate (Lisp_Object s1
, Lisp_Object s2
,
3735 Lisp_Object locale
, Lisp_Object ignore_case
)
3738 char *loc
= STRINGP (locale
) ? SSDATA (locale
) : NULL
;
3739 int res
, err
= errno
;
3742 res
= w32_compare_strings (SDATA (s1
), SDATA (s2
), loc
, !NILP (ignore_case
));
3744 error ("Invalid string for collation: %s", strerror (errno
));
3749 #endif /* WINDOWSNT */