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/>. */
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)
1411 if (DETERMINISTIC_DUMP
&& (might_dump
|| ! NILP (Vpurify_flag
)))
1413 /* If we're dumping, set the hostname to a literal so that the
1414 dump is deterministic. */
1415 Vsystem_name
= build_pure_c_string ("elided");
1418 char *hostname_alloc
= NULL
;
1420 #ifndef HAVE_GETHOSTNAME
1423 hostname
= uts
.nodename
;
1424 #else /* HAVE_GETHOSTNAME */
1425 char hostname_buf
[256];
1426 ptrdiff_t hostname_size
= sizeof hostname_buf
;
1427 hostname
= hostname_buf
;
1429 /* Try to get the host name; if the buffer is too short, try
1430 again. Apparently, the only indication gethostname gives of
1431 whether the buffer was large enough is the presence or absence
1432 of a '\0' in the string. Eech. */
1435 gethostname (hostname
, hostname_size
- 1);
1436 hostname
[hostname_size
- 1] = '\0';
1438 /* Was the buffer large enough for the '\0'? */
1439 if (strlen (hostname
) < hostname_size
- 1)
1442 hostname
= hostname_alloc
= xpalloc (hostname_alloc
, &hostname_size
, 1,
1443 min (PTRDIFF_MAX
, SIZE_MAX
), 1);
1445 #endif /* HAVE_GETHOSTNAME */
1447 for (p
= hostname
; *p
; p
++)
1448 if (*p
== ' ' || *p
== '\t')
1450 if (! (STRINGP (Vsystem_name
) && SBYTES (Vsystem_name
) == p
- hostname
1451 && strcmp (SSDATA (Vsystem_name
), hostname
) == 0))
1452 Vsystem_name
= build_string (hostname
);
1453 xfree (hostname_alloc
);
1456 sigset_t empty_mask
;
1458 static struct sigaction process_fatal_action
;
1461 emacs_sigaction_flags (void)
1464 /* SA_RESTART causes interruptible functions with timeouts (e.g.,
1465 'select') to reset their timeout on some platforms (e.g.,
1466 HP-UX 11), which is not what we want. Also, when Emacs is
1467 interactive, we don't want SA_RESTART because we need to poll
1468 for pending input so we need long-running syscalls to be interrupted
1469 after a signal that sets pending_signals.
1471 Non-interactive keyboard input goes through stdio, where we
1472 always want restartable system calls. */
1479 /* Store into *ACTION a signal action suitable for Emacs, with handler
1482 emacs_sigaction_init (struct sigaction
*action
, signal_handler_t handler
)
1484 sigemptyset (&action
->sa_mask
);
1486 /* When handling a signal, block nonfatal system signals that are caught
1487 by Emacs. This makes race conditions less likely. */
1488 sigaddset (&action
->sa_mask
, SIGALRM
);
1490 sigaddset (&action
->sa_mask
, SIGCHLD
);
1493 sigaddset (&action
->sa_mask
, SIGDANGER
);
1495 #ifdef PROFILER_CPU_SUPPORT
1496 sigaddset (&action
->sa_mask
, SIGPROF
);
1499 sigaddset (&action
->sa_mask
, SIGWINCH
);
1501 if (! noninteractive
)
1503 sigaddset (&action
->sa_mask
, SIGINT
);
1504 sigaddset (&action
->sa_mask
, SIGQUIT
);
1506 sigaddset (&action
->sa_mask
, SIGIO
);
1510 action
->sa_handler
= handler
;
1511 action
->sa_flags
= emacs_sigaction_flags ();
1514 #ifdef FORWARD_SIGNAL_TO_MAIN_THREAD
1515 static pthread_t main_thread
;
1518 /* SIG has arrived at the current process. Deliver it to the main
1519 thread, which should handle it with HANDLER.
1521 If we are on the main thread, handle the signal SIG with HANDLER.
1522 Otherwise, redirect the signal to the main thread, blocking it from
1523 this thread. POSIX says any thread can receive a signal that is
1524 associated with a process, process group, or asynchronous event.
1525 On GNU/Linux that is not true, but for other systems (FreeBSD at
1528 deliver_process_signal (int sig
, signal_handler_t handler
)
1530 /* Preserve errno, to avoid race conditions with signal handlers that
1531 might change errno. Races can occur even in single-threaded hosts. */
1532 int old_errno
= errno
;
1534 bool on_main_thread
= true;
1535 #ifdef FORWARD_SIGNAL_TO_MAIN_THREAD
1536 if (! pthread_equal (pthread_self (), main_thread
))
1539 sigemptyset (&blocked
);
1540 sigaddset (&blocked
, sig
);
1541 pthread_sigmask (SIG_BLOCK
, &blocked
, 0);
1542 pthread_kill (main_thread
, sig
);
1543 on_main_thread
= false;
1552 /* Static location to save a fatal backtrace in a thread.
1553 FIXME: If two subsidiary threads fail simultaneously, the resulting
1554 backtrace may be garbage. */
1555 enum { BACKTRACE_LIMIT_MAX
= 500 };
1556 static void *thread_backtrace_buffer
[BACKTRACE_LIMIT_MAX
+ 1];
1557 static int thread_backtrace_npointers
;
1559 /* SIG has arrived at the current thread.
1560 If we are on the main thread, handle the signal SIG with HANDLER.
1561 Otherwise, this is a fatal error in the handling thread. */
1563 deliver_thread_signal (int sig
, signal_handler_t handler
)
1565 int old_errno
= errno
;
1567 #ifdef FORWARD_SIGNAL_TO_MAIN_THREAD
1568 if (! pthread_equal (pthread_self (), main_thread
))
1570 thread_backtrace_npointers
1571 = backtrace (thread_backtrace_buffer
, BACKTRACE_LIMIT_MAX
);
1572 sigaction (sig
, &process_fatal_action
, 0);
1573 pthread_kill (main_thread
, sig
);
1575 /* Avoid further damage while the main thread is exiting. */
1577 sigsuspend (&empty_mask
);
1585 #if !HAVE_DECL_SYS_SIGLIST
1587 # ifdef _sys_siglist
1588 # define sys_siglist _sys_siglist
1589 # elif HAVE_DECL___SYS_SIGLIST
1590 # define sys_siglist __sys_siglist
1592 # define sys_siglist my_sys_siglist
1593 static char const *sys_siglist
[NSIG
];
1598 # define sys_siglist_entries _sys_nsig
1600 # define sys_siglist_entries NSIG
1603 /* Handle bus errors, invalid instruction, etc. */
1605 handle_fatal_signal (int sig
)
1607 terminate_due_to_signal (sig
, 40);
1611 deliver_fatal_signal (int sig
)
1613 deliver_process_signal (sig
, handle_fatal_signal
);
1617 deliver_fatal_thread_signal (int sig
)
1619 deliver_thread_signal (sig
, handle_fatal_signal
);
1622 static _Noreturn
void
1623 handle_arith_signal (int sig
)
1625 pthread_sigmask (SIG_SETMASK
, &empty_mask
, 0);
1626 xsignal0 (Qarith_error
);
1629 #if defined HAVE_STACK_OVERFLOW_HANDLING && !defined WINDOWSNT
1631 /* Alternate stack used by SIGSEGV handler below. */
1633 static unsigned char sigsegv_stack
[SIGSTKSZ
];
1636 /* Return true if SIGINFO indicates a stack overflow. */
1639 stack_overflow (siginfo_t
*siginfo
)
1641 if (!attempt_stack_overflow_recovery
)
1644 /* In theory, a more-accurate heuristic can be obtained by using
1645 GNU/Linux pthread_getattr_np along with POSIX pthread_attr_getstack
1646 and pthread_attr_getguardsize to find the location and size of the
1647 guard area. In practice, though, these functions are so hard to
1648 use reliably that they're not worth bothering with. E.g., see:
1649 https://sourceware.org/bugzilla/show_bug.cgi?id=16291
1650 Other operating systems also have problems, e.g., Solaris's
1651 stack_violation function is tailor-made for this problem, but it
1652 doesn't work on Solaris 11.2 x86-64 with a 32-bit executable.
1654 GNU libsigsegv is overkill for Emacs; otherwise it might be a
1660 /* The faulting address. */
1661 char *addr
= siginfo
->si_addr
;
1665 /* The known top and bottom of the stack. The actual stack may
1666 extend a bit beyond these boundaries. */
1667 char *bot
= stack_bottom
;
1668 char *top
= near_C_stack_top ();
1670 /* Log base 2 of the stack heuristic ratio. This ratio is the size
1671 of the known stack divided by the size of the guard area past the
1672 end of the stack top. The heuristic is that a bad address is
1673 considered to be a stack overflow if it occurs within
1674 stacksize>>LG_STACK_HEURISTIC bytes above the top of the known
1675 stack. This heuristic is not exactly correct but it's good
1676 enough in practice. */
1677 enum { LG_STACK_HEURISTIC
= 8 };
1680 return 0 <= addr
- top
&& addr
- top
< (top
- bot
) >> LG_STACK_HEURISTIC
;
1682 return 0 <= top
- addr
&& top
- addr
< (bot
- top
) >> LG_STACK_HEURISTIC
;
1686 /* Attempt to recover from SIGSEGV caused by C stack overflow. */
1689 handle_sigsegv (int sig
, siginfo_t
*siginfo
, void *arg
)
1691 /* Hard GC error may lead to stack overflow caused by
1692 too nested calls to mark_object. No way to survive. */
1693 bool fatal
= gc_in_progress
;
1695 #ifdef FORWARD_SIGNAL_TO_MAIN_THREAD
1696 if (!fatal
&& !pthread_equal (pthread_self (), main_thread
))
1700 if (!fatal
&& stack_overflow (siginfo
))
1701 siglongjmp (return_to_command_loop
, 1);
1703 /* Otherwise we can't do anything with this. */
1704 deliver_fatal_thread_signal (sig
);
1707 /* Return true if we have successfully set up SIGSEGV handler on alternate
1708 stack. Otherwise we just treat SIGSEGV among the rest of fatal signals. */
1713 struct sigaction sa
;
1716 ss
.ss_sp
= sigsegv_stack
;
1717 ss
.ss_size
= sizeof (sigsegv_stack
);
1719 if (sigaltstack (&ss
, NULL
) < 0)
1722 sigfillset (&sa
.sa_mask
);
1723 sa
.sa_sigaction
= handle_sigsegv
;
1724 sa
.sa_flags
= SA_SIGINFO
| SA_ONSTACK
| emacs_sigaction_flags ();
1725 return sigaction (SIGSEGV
, &sa
, NULL
) < 0 ? 0 : 1;
1728 #else /* not HAVE_STACK_OVERFLOW_HANDLING or WINDOWSNT */
1736 #endif /* HAVE_STACK_OVERFLOW_HANDLING && !WINDOWSNT */
1739 deliver_arith_signal (int sig
)
1741 deliver_thread_signal (sig
, handle_arith_signal
);
1746 /* Handler for SIGDANGER. */
1748 handle_danger_signal (int sig
)
1750 malloc_warning ("Operating system warns that virtual memory is running low.\n");
1752 /* It might be unsafe to call do_auto_save now. */
1753 force_auto_save_soon ();
1757 deliver_danger_signal (int sig
)
1759 deliver_process_signal (sig
, handle_danger_signal
);
1763 /* Treat SIG as a terminating signal, unless it is already ignored and
1764 we are in --batch mode. Among other things, this makes nohup work. */
1766 maybe_fatal_sig (int sig
)
1768 bool catch_sig
= !noninteractive
;
1771 struct sigaction old_action
;
1772 sigaction (sig
, 0, &old_action
);
1773 catch_sig
= old_action
.sa_handler
!= SIG_IGN
;
1776 sigaction (sig
, &process_fatal_action
, 0);
1780 init_signals (bool dumping
)
1782 struct sigaction thread_fatal_action
;
1783 struct sigaction action
;
1785 sigemptyset (&empty_mask
);
1787 #ifdef FORWARD_SIGNAL_TO_MAIN_THREAD
1788 main_thread
= pthread_self ();
1791 #if !HAVE_DECL_SYS_SIGLIST && !defined _sys_siglist
1794 sys_siglist
[SIGABRT
] = "Aborted";
1796 sys_siglist
[SIGAIO
] = "LAN I/O interrupt";
1798 sys_siglist
[SIGALRM
] = "Alarm clock";
1800 sys_siglist
[SIGBUS
] = "Bus error";
1803 sys_siglist
[SIGCHLD
] = "Child status changed";
1806 sys_siglist
[SIGCONT
] = "Continued";
1809 sys_siglist
[SIGDANGER
] = "Swap space dangerously low";
1812 sys_siglist
[SIGDGNOTIFY
] = "Notification message in queue";
1815 sys_siglist
[SIGEMT
] = "Emulation trap";
1817 sys_siglist
[SIGFPE
] = "Arithmetic exception";
1819 sys_siglist
[SIGFREEZE
] = "SIGFREEZE";
1822 sys_siglist
[SIGGRANT
] = "Monitor mode granted";
1824 sys_siglist
[SIGHUP
] = "Hangup";
1825 sys_siglist
[SIGILL
] = "Illegal instruction";
1826 sys_siglist
[SIGINT
] = "Interrupt";
1828 sys_siglist
[SIGIO
] = "I/O possible";
1831 sys_siglist
[SIGIOINT
] = "I/O intervention required";
1834 sys_siglist
[SIGIOT
] = "IOT trap";
1836 sys_siglist
[SIGKILL
] = "Killed";
1838 sys_siglist
[SIGLOST
] = "Resource lost";
1841 sys_siglist
[SIGLWP
] = "SIGLWP";
1844 sys_siglist
[SIGMSG
] = "Monitor mode data available";
1847 sys_siglist
[SIGWIND
] = "SIGPHONE";
1849 sys_siglist
[SIGPIPE
] = "Broken pipe";
1851 sys_siglist
[SIGPOLL
] = "Pollable event occurred";
1854 sys_siglist
[SIGPROF
] = "Profiling timer expired";
1857 sys_siglist
[SIGPTY
] = "PTY I/O interrupt";
1860 sys_siglist
[SIGPWR
] = "Power-fail restart";
1862 sys_siglist
[SIGQUIT
] = "Quit";
1864 sys_siglist
[SIGRETRACT
] = "Need to relinquish monitor mode";
1867 sys_siglist
[SIGSAK
] = "Secure attention";
1869 sys_siglist
[SIGSEGV
] = "Segmentation violation";
1871 sys_siglist
[SIGSOUND
] = "Sound completed";
1874 sys_siglist
[SIGSTOP
] = "Stopped (signal)";
1877 sys_siglist
[SIGSTP
] = "Stopped (user)";
1880 sys_siglist
[SIGSYS
] = "Bad argument to system call";
1882 sys_siglist
[SIGTERM
] = "Terminated";
1884 sys_siglist
[SIGTHAW
] = "SIGTHAW";
1887 sys_siglist
[SIGTRAP
] = "Trace/breakpoint trap";
1890 sys_siglist
[SIGTSTP
] = "Stopped (user)";
1893 sys_siglist
[SIGTTIN
] = "Stopped (tty input)";
1896 sys_siglist
[SIGTTOU
] = "Stopped (tty output)";
1899 sys_siglist
[SIGURG
] = "Urgent I/O condition";
1902 sys_siglist
[SIGUSR1
] = "User defined signal 1";
1905 sys_siglist
[SIGUSR2
] = "User defined signal 2";
1908 sys_siglist
[SIGVTALRM
] = "Virtual timer expired";
1911 sys_siglist
[SIGWAITING
] = "Process's LWPs are blocked";
1914 sys_siglist
[SIGWINCH
] = "Window size changed";
1917 sys_siglist
[SIGWIND
] = "SIGWIND";
1920 sys_siglist
[SIGXCPU
] = "CPU time limit exceeded";
1923 sys_siglist
[SIGXFSZ
] = "File size limit exceeded";
1926 #endif /* !HAVE_DECL_SYS_SIGLIST && !_sys_siglist */
1928 /* Don't alter signal handlers if dumping. On some machines,
1929 changing signal handlers sets static data that would make signals
1930 fail to work right when the dumped Emacs is run. */
1934 sigfillset (&process_fatal_action
.sa_mask
);
1935 process_fatal_action
.sa_handler
= deliver_fatal_signal
;
1936 process_fatal_action
.sa_flags
= emacs_sigaction_flags ();
1938 sigfillset (&thread_fatal_action
.sa_mask
);
1939 thread_fatal_action
.sa_handler
= deliver_fatal_thread_signal
;
1940 thread_fatal_action
.sa_flags
= process_fatal_action
.sa_flags
;
1942 /* SIGINT may need special treatment on MS-Windows. See
1943 http://lists.gnu.org/archive/html/emacs-devel/2010-09/msg01062.html
1944 Please update the doc of kill-emacs, kill-emacs-hook, and
1945 NEWS if you change this. */
1947 maybe_fatal_sig (SIGHUP
);
1948 maybe_fatal_sig (SIGINT
);
1949 maybe_fatal_sig (SIGTERM
);
1951 /* Emacs checks for write errors, so it can safely ignore SIGPIPE.
1952 However, in batch mode leave SIGPIPE alone, as that causes Emacs
1953 to behave more like typical batch applications do. */
1954 if (! noninteractive
)
1955 signal (SIGPIPE
, SIG_IGN
);
1957 sigaction (SIGQUIT
, &process_fatal_action
, 0);
1958 sigaction (SIGILL
, &thread_fatal_action
, 0);
1959 sigaction (SIGTRAP
, &thread_fatal_action
, 0);
1961 /* Typically SIGFPE is thread-specific and is fatal, like SIGILL.
1962 But on a non-IEEE host SIGFPE can come from a trap in the Lisp
1963 interpreter's floating point operations, so treat SIGFPE as an
1964 arith-error if it arises in the main thread. */
1965 if (IEEE_FLOATING_POINT
)
1966 sigaction (SIGFPE
, &thread_fatal_action
, 0);
1969 emacs_sigaction_init (&action
, deliver_arith_signal
);
1970 sigaction (SIGFPE
, &action
, 0);
1974 add_user_signal (SIGUSR1
, "sigusr1");
1977 add_user_signal (SIGUSR2
, "sigusr2");
1979 sigaction (SIGABRT
, &thread_fatal_action
, 0);
1981 sigaction (SIGPRE
, &thread_fatal_action
, 0);
1984 sigaction (SIGORE
, &thread_fatal_action
, 0);
1987 sigaction (SIGUME
, &thread_fatal_action
, 0);
1990 sigaction (SIGDLK
, &process_fatal_action
, 0);
1993 sigaction (SIGCPULIM
, &process_fatal_action
, 0);
1996 sigaction (SIGIOT
, &thread_fatal_action
, 0);
1999 sigaction (SIGEMT
, &thread_fatal_action
, 0);
2002 sigaction (SIGBUS
, &thread_fatal_action
, 0);
2004 if (!init_sigsegv ())
2005 sigaction (SIGSEGV
, &thread_fatal_action
, 0);
2007 sigaction (SIGSYS
, &thread_fatal_action
, 0);
2009 sigaction (SIGTERM
, &process_fatal_action
, 0);
2011 signal (SIGPROF
, SIG_IGN
);
2014 sigaction (SIGVTALRM
, &process_fatal_action
, 0);
2017 sigaction (SIGXCPU
, &process_fatal_action
, 0);
2020 sigaction (SIGXFSZ
, &process_fatal_action
, 0);
2024 /* This just means available memory is getting low. */
2025 emacs_sigaction_init (&action
, deliver_danger_signal
);
2026 sigaction (SIGDANGER
, &action
, 0);
2029 /* AIX-specific signals. */
2031 sigaction (SIGGRANT
, &process_fatal_action
, 0);
2034 sigaction (SIGMIGRATE
, &process_fatal_action
, 0);
2037 sigaction (SIGMSG
, &process_fatal_action
, 0);
2040 sigaction (SIGRETRACT
, &process_fatal_action
, 0);
2043 sigaction (SIGSAK
, &process_fatal_action
, 0);
2046 sigaction (SIGSOUND
, &process_fatal_action
, 0);
2049 sigaction (SIGTALRM
, &thread_fatal_action
, 0);
2059 /* Figure out how many bits the system's random number generator uses.
2060 `random' and `lrand48' are assumed to return 31 usable bits.
2061 BSD `rand' returns a 31 bit value but the low order bits are unusable;
2062 so we'll shift it and treat it like the 15-bit USG `rand'. */
2066 # define RAND_BITS 31
2067 # else /* !HAVE_RANDOM */
2068 # ifdef HAVE_LRAND48
2069 # define RAND_BITS 31
2070 # define random lrand48
2071 # else /* !HAVE_LRAND48 */
2072 # define RAND_BITS 15
2073 # if RAND_MAX == 32767
2074 # define random rand
2075 # else /* RAND_MAX != 32767 */
2076 # if RAND_MAX == 2147483647
2077 # define random() (rand () >> 16)
2078 # else /* RAND_MAX != 2147483647 */
2080 # define random rand
2082 # define random() (rand () >> 16)
2084 # endif /* RAND_MAX != 2147483647 */
2085 # endif /* RAND_MAX != 32767 */
2086 # endif /* !HAVE_LRAND48 */
2087 # endif /* !HAVE_RANDOM */
2088 #endif /* !RAND_BITS */
2091 typedef unsigned int random_seed
;
2092 static void set_random_seed (random_seed arg
) { srandom (arg
); }
2093 #elif defined HAVE_LRAND48
2094 /* Although srand48 uses a long seed, this is unsigned long to avoid
2095 undefined behavior on signed integer overflow in init_random. */
2096 typedef unsigned long int random_seed
;
2097 static void set_random_seed (random_seed arg
) { srand48 (arg
); }
2099 typedef unsigned int random_seed
;
2100 static void set_random_seed (random_seed arg
) { srand (arg
); }
2104 seed_random (void *seed
, ptrdiff_t seed_size
)
2106 random_seed arg
= 0;
2107 unsigned char *argp
= (unsigned char *) &arg
;
2108 unsigned char *seedp
= seed
;
2109 for (ptrdiff_t i
= 0; i
< seed_size
; i
++)
2110 argp
[i
% sizeof arg
] ^= seedp
[i
];
2111 set_random_seed (arg
);
2118 if (! (EQ (emacs_gnutls_global_init (), Qt
)
2119 && gnutls_rnd (GNUTLS_RND_NONCE
, &v
, sizeof v
) == 0))
2121 bool success
= false;
2123 int fd
= emacs_open ("/dev/urandom", O_RDONLY
| O_BINARY
, 0);
2126 success
= emacs_read (fd
, &v
, sizeof v
) == sizeof v
;
2130 success
= w32_init_random (&v
, sizeof v
) == 0;
2134 /* Fall back to current time value + PID. */
2135 struct timespec t
= current_timespec ();
2136 v
= getpid () ^ t
.tv_sec
^ t
.tv_nsec
;
2139 set_random_seed (v
);
2143 * Return a nonnegative random integer out of whatever we've got.
2144 * It contains enough bits to make a random (signed) Emacs fixnum.
2145 * This suffices even for a 64-bit architecture with a 15-bit rand.
2152 for (i
= 0; i
< (FIXNUM_BITS
+ RAND_BITS
- 1) / RAND_BITS
; i
++)
2153 val
= (random () ^ (val
<< RAND_BITS
)
2154 ^ (val
>> (BITS_PER_EMACS_INT
- RAND_BITS
)));
2155 val
^= val
>> (BITS_PER_EMACS_INT
- FIXNUM_BITS
);
2156 return val
& INTMASK
;
2159 #ifndef HAVE_SNPRINTF
2160 /* Approximate snprintf as best we can on ancient hosts that lack it. */
2162 snprintf (char *buf
, size_t bufsize
, char const *format
, ...)
2164 ptrdiff_t size
= min (bufsize
, PTRDIFF_MAX
);
2165 ptrdiff_t nbytes
= size
- 1;
2170 va_start (ap
, format
);
2171 nbytes
= doprnt (buf
, size
, format
, 0, ap
);
2175 if (nbytes
== size
- 1)
2177 /* Calculate the length of the string that would have been created
2178 had the buffer been large enough. */
2179 char stackbuf
[4000];
2181 ptrdiff_t bsize
= sizeof stackbuf
;
2182 va_start (ap
, format
);
2183 nbytes
= evxprintf (&b
, &bsize
, stackbuf
, -1, format
, ap
);
2189 if (INT_MAX
< nbytes
)
2202 /* If a backtrace is available, output the top lines of it to stderr.
2203 Do not output more than BACKTRACE_LIMIT or BACKTRACE_LIMIT_MAX lines.
2204 This function may be called from a signal handler, so it should
2205 not invoke async-unsafe functions like malloc.
2207 If BACKTRACE_LIMIT is -1, initialize tables that 'backtrace' uses
2208 but do not output anything. This avoids some problems that can
2209 otherwise occur if the malloc arena is corrupted before 'backtrace'
2210 is called, since 'backtrace' may call malloc if the tables are not
2213 If the static variable THREAD_BACKTRACE_NPOINTERS is nonzero, a
2214 fatal error has occurred in some other thread; generate a thread
2215 backtrace instead, ignoring BACKTRACE_LIMIT. */
2217 emacs_backtrace (int backtrace_limit
)
2219 void *main_backtrace_buffer
[BACKTRACE_LIMIT_MAX
+ 1];
2220 int bounded_limit
= min (backtrace_limit
, BACKTRACE_LIMIT_MAX
);
2224 if (thread_backtrace_npointers
)
2226 buffer
= thread_backtrace_buffer
;
2227 npointers
= thread_backtrace_npointers
;
2231 buffer
= main_backtrace_buffer
;
2233 /* Work around 'backtrace' bug; see Bug#19959 and glibc bug#18084. */
2234 if (bounded_limit
< 0)
2236 backtrace (buffer
, 1);
2240 npointers
= backtrace (buffer
, bounded_limit
+ 1);
2245 emacs_write (STDERR_FILENO
, "\nBacktrace:\n", 12);
2246 backtrace_symbols_fd (buffer
, npointers
, STDERR_FILENO
);
2247 if (bounded_limit
< npointers
)
2248 emacs_write (STDERR_FILENO
, "...\n", 4);
2256 terminate_due_to_signal (SIGABRT
, 40);
2260 /* Open FILE for Emacs use, using open flags OFLAG and mode MODE.
2261 Use binary I/O on systems that care about text vs binary I/O.
2262 Arrange for subprograms to not inherit the file descriptor.
2263 Prefer a method that is multithread-safe, if available.
2264 Do not fail merely because the open was interrupted by a signal.
2265 Allow the user to quit. */
2268 emacs_open (const char *file
, int oflags
, int mode
)
2271 if (! (oflags
& O_TEXT
))
2273 oflags
|= O_CLOEXEC
;
2274 while ((fd
= open (file
, oflags
, mode
)) < 0 && errno
== EINTR
)
2276 if (! O_CLOEXEC
&& 0 <= fd
)
2277 fcntl (fd
, F_SETFD
, FD_CLOEXEC
);
2281 /* Open FILE as a stream for Emacs use, with mode MODE.
2282 Act like emacs_open with respect to threads, signals, and quits. */
2285 emacs_fopen (char const *file
, char const *mode
)
2287 int fd
, omode
, oflags
;
2289 char const *m
= mode
;
2293 case 'r': omode
= O_RDONLY
; oflags
= 0; break;
2294 case 'w': omode
= O_WRONLY
; oflags
= O_CREAT
| O_TRUNC
; break;
2295 case 'a': omode
= O_WRONLY
; oflags
= O_CREAT
| O_APPEND
; break;
2296 default: emacs_abort ();
2302 case '+': omode
= O_RDWR
; break;
2303 case 'b': bflag
= O_BINARY
; break;
2304 case 't': bflag
= O_TEXT
; break;
2305 default: /* Ignore. */ break;
2308 fd
= emacs_open (file
, omode
| oflags
| bflag
, 0666);
2309 return fd
< 0 ? 0 : fdopen (fd
, mode
);
2312 /* Create a pipe for Emacs use. */
2315 emacs_pipe (int fd
[2])
2320 int result
= pipe2 (fd
, O_BINARY
| O_CLOEXEC
);
2321 if (! O_CLOEXEC
&& result
== 0)
2323 fcntl (fd
[0], F_SETFD
, FD_CLOEXEC
);
2324 fcntl (fd
[1], F_SETFD
, FD_CLOEXEC
);
2330 /* Approximate posix_close and POSIX_CLOSE_RESTART well enough for Emacs.
2331 For the background behind this mess, please see Austin Group defect 529
2332 <http://austingroupbugs.net/view.php?id=529>. */
2334 #ifndef POSIX_CLOSE_RESTART
2335 # define POSIX_CLOSE_RESTART 1
2337 posix_close (int fd
, int flag
)
2339 /* Only the POSIX_CLOSE_RESTART case is emulated. */
2340 eassert (flag
== POSIX_CLOSE_RESTART
);
2342 /* Things are tricky if close (fd) returns -1 with errno == EINTR
2343 on a system that does not define POSIX_CLOSE_RESTART.
2345 In this case, in some systems (e.g., GNU/Linux, AIX) FD is
2346 closed, and retrying the close could inadvertently close a file
2347 descriptor allocated by some other thread. In other systems
2348 (e.g., HP/UX) FD is not closed. And in still other systems
2349 (e.g., OS X, Solaris), maybe FD is closed, maybe not, and in a
2350 multithreaded program there can be no way to tell.
2352 So, in this case, pretend that the close succeeded. This works
2353 well on systems like GNU/Linux that close FD. Although it may
2354 leak a file descriptor on other systems, the leak is unlikely and
2355 it's better to leak than to close a random victim. */
2356 return close (fd
) == 0 || errno
== EINTR
? 0 : -1;
2360 /* Close FD, retrying if interrupted. If successful, return 0;
2361 otherwise, return -1 and set errno to a non-EINTR value. Consider
2362 an EINPROGRESS error to be successful, as that's merely a signal
2363 arriving. FD is always closed when this function returns, even
2366 Do not call this function if FD is nonnegative and might already be closed,
2367 as that might close an innocent victim opened by some other thread. */
2370 emacs_close (int fd
)
2374 int r
= posix_close (fd
, POSIX_CLOSE_RESTART
);
2377 if (!POSIX_CLOSE_RESTART
|| errno
!= EINTR
)
2379 eassert (errno
!= EBADF
|| fd
< 0);
2380 return errno
== EINPROGRESS
? 0 : r
;
2385 /* Maximum number of bytes to read or write in a single system call.
2386 This works around a serious bug in Linux kernels before 2.6.16; see
2387 <https://bugzilla.redhat.com/show_bug.cgi?format=multiple&id=612839>.
2388 It's likely to work around similar bugs in other operating systems, so do it
2389 on all platforms. Round INT_MAX down to a page size, with the conservative
2390 assumption that page sizes are at most 2**18 bytes (any kernel with a
2391 page size larger than that shouldn't have the bug). */
2392 #ifndef MAX_RW_COUNT
2393 #define MAX_RW_COUNT (INT_MAX >> 18 << 18)
2396 /* Read from FILEDESC to a buffer BUF with size NBYTE, retrying if interrupted.
2397 Return the number of bytes read, which might be less than NBYTE.
2398 On error, set errno and return -1. */
2400 emacs_read (int fildes
, void *buf
, ptrdiff_t nbyte
)
2404 /* There is no need to check against MAX_RW_COUNT, since no caller ever
2405 passes a size that large to emacs_read. */
2407 while ((rtnval
= read (fildes
, buf
, nbyte
)) == -1
2408 && (errno
== EINTR
))
2413 /* Write to FILEDES from a buffer BUF with size NBYTE, retrying if interrupted
2414 or if a partial write occurs. If interrupted, process pending
2415 signals if PROCESS SIGNALS. Return the number of bytes written, setting
2416 errno if this is less than NBYTE. */
2418 emacs_full_write (int fildes
, char const *buf
, ptrdiff_t nbyte
,
2419 bool process_signals
)
2421 ptrdiff_t bytes_written
= 0;
2425 ssize_t n
= write (fildes
, buf
, min (nbyte
, MAX_RW_COUNT
));
2431 /* I originally used `QUIT' but that might cause files to
2432 be truncated if you hit C-g in the middle of it. --Stef */
2433 if (process_signals
&& pending_signals
)
2434 process_pending_signals ();
2446 return bytes_written
;
2449 /* Write to FILEDES from a buffer BUF with size NBYTE, retrying if
2450 interrupted or if a partial write occurs. Return the number of
2451 bytes written, setting errno if this is less than NBYTE. */
2453 emacs_write (int fildes
, void const *buf
, ptrdiff_t nbyte
)
2455 return emacs_full_write (fildes
, buf
, nbyte
, 0);
2458 /* Like emacs_write, but also process pending signals if interrupted. */
2460 emacs_write_sig (int fildes
, void const *buf
, ptrdiff_t nbyte
)
2462 return emacs_full_write (fildes
, buf
, nbyte
, 1);
2465 /* Write a diagnostic to standard error that contains MESSAGE and a
2466 string derived from errno. Preserve errno. Do not buffer stderr.
2467 Do not process pending signals if interrupted. */
2469 emacs_perror (char const *message
)
2472 char const *error_string
= strerror (err
);
2473 char const *command
= (initial_argv
&& initial_argv
[0]
2474 ? initial_argv
[0] : "emacs");
2475 /* Write it out all at once, if it's short; this is less likely to
2476 be interleaved with other output. */
2478 int nbytes
= snprintf (buf
, sizeof buf
, "%s: %s: %s\n",
2479 command
, message
, error_string
);
2480 if (0 <= nbytes
&& nbytes
< BUFSIZ
)
2481 emacs_write (STDERR_FILENO
, buf
, nbytes
);
2484 emacs_write (STDERR_FILENO
, command
, strlen (command
));
2485 emacs_write (STDERR_FILENO
, ": ", 2);
2486 emacs_write (STDERR_FILENO
, message
, strlen (message
));
2487 emacs_write (STDERR_FILENO
, ": ", 2);
2488 emacs_write (STDERR_FILENO
, error_string
, strlen (error_string
));
2489 emacs_write (STDERR_FILENO
, "\n", 1);
2494 /* Return a struct timeval that is roughly equivalent to T.
2495 Use the least timeval not less than T.
2496 Return an extremal value if the result would overflow. */
2498 make_timeval (struct timespec t
)
2501 tv
.tv_sec
= t
.tv_sec
;
2502 tv
.tv_usec
= t
.tv_nsec
/ 1000;
2504 if (t
.tv_nsec
% 1000 != 0)
2506 if (tv
.tv_usec
< 999999)
2508 else if (tv
.tv_sec
< TYPE_MAXIMUM (time_t))
2518 /* Set the access and modification time stamps of FD (a.k.a. FILE) to be
2519 ATIME and MTIME, respectively.
2520 FD must be either negative -- in which case it is ignored --
2521 or a file descriptor that is open on FILE.
2522 If FD is nonnegative, then FILE can be NULL. */
2524 set_file_times (int fd
, const char *filename
,
2525 struct timespec atime
, struct timespec mtime
)
2527 struct timespec timespec
[2];
2528 timespec
[0] = atime
;
2529 timespec
[1] = mtime
;
2530 return fdutimens (fd
, filename
, timespec
);
2533 /* Like strsignal, except async-signal-safe, and this function typically
2534 returns a string in the C locale rather than the current locale. */
2536 safe_strsignal (int code
)
2538 char const *signame
= 0;
2540 if (0 <= code
&& code
< sys_siglist_entries
)
2541 signame
= sys_siglist
[code
];
2543 signame
= "Unknown signal";
2549 /* For make-serial-process */
2551 serial_open (Lisp_Object port
)
2553 int fd
= emacs_open (SSDATA (port
), O_RDWR
| O_NOCTTY
| O_NONBLOCK
, 0);
2555 report_file_error ("Opening serial port", port
);
2557 ioctl (fd
, TIOCEXCL
, (char *) 0);
2563 #if !defined (HAVE_CFMAKERAW)
2564 /* Workaround for targets which are missing cfmakeraw. */
2565 /* Pasted from man page. */
2567 cfmakeraw (struct termios
*termios_p
)
2569 termios_p
->c_iflag
&= ~(IGNBRK
|BRKINT
|PARMRK
|ISTRIP
|INLCR
|IGNCR
|ICRNL
|IXON
);
2570 termios_p
->c_oflag
&= ~OPOST
;
2571 termios_p
->c_lflag
&= ~(ECHO
|ECHONL
|ICANON
|ISIG
|IEXTEN
);
2572 termios_p
->c_cflag
&= ~(CSIZE
|PARENB
);
2573 termios_p
->c_cflag
|= CS8
;
2575 #endif /* !defined (HAVE_CFMAKERAW */
2577 #if !defined (HAVE_CFSETSPEED)
2578 /* Workaround for targets which are missing cfsetspeed. */
2580 cfsetspeed (struct termios
*termios_p
, speed_t vitesse
)
2582 return (cfsetispeed (termios_p
, vitesse
)
2583 + cfsetospeed (termios_p
, vitesse
));
2587 /* For serial-process-configure */
2589 serial_configure (struct Lisp_Process
*p
,
2590 Lisp_Object contact
)
2592 Lisp_Object childp2
= Qnil
;
2593 Lisp_Object tem
= Qnil
;
2594 struct termios attr
;
2596 char summary
[4] = "???"; /* This usually becomes "8N1". */
2598 childp2
= Fcopy_sequence (p
->childp
);
2600 /* Read port attributes and prepare default configuration. */
2601 err
= tcgetattr (p
->outfd
, &attr
);
2603 report_file_error ("Failed tcgetattr", Qnil
);
2605 #if defined (CLOCAL)
2606 attr
.c_cflag
|= CLOCAL
;
2609 attr
.c_cflag
|= CREAD
;
2612 /* Configure speed. */
2613 if (!NILP (Fplist_member (contact
, QCspeed
)))
2614 tem
= Fplist_get (contact
, QCspeed
);
2616 tem
= Fplist_get (p
->childp
, QCspeed
);
2618 err
= cfsetspeed (&attr
, XINT (tem
));
2620 report_file_error ("Failed cfsetspeed", tem
);
2621 childp2
= Fplist_put (childp2
, QCspeed
, tem
);
2623 /* Configure bytesize. */
2624 if (!NILP (Fplist_member (contact
, QCbytesize
)))
2625 tem
= Fplist_get (contact
, QCbytesize
);
2627 tem
= Fplist_get (p
->childp
, QCbytesize
);
2629 tem
= make_number (8);
2631 if (XINT (tem
) != 7 && XINT (tem
) != 8)
2632 error (":bytesize must be nil (8), 7, or 8");
2633 summary
[0] = XINT (tem
) + '0';
2634 #if defined (CSIZE) && defined (CS7) && defined (CS8)
2635 attr
.c_cflag
&= ~CSIZE
;
2636 attr
.c_cflag
|= ((XINT (tem
) == 7) ? CS7
: CS8
);
2638 /* Don't error on bytesize 8, which should be set by cfmakeraw. */
2639 if (XINT (tem
) != 8)
2640 error ("Bytesize cannot be changed");
2642 childp2
= Fplist_put (childp2
, QCbytesize
, tem
);
2644 /* Configure parity. */
2645 if (!NILP (Fplist_member (contact
, QCparity
)))
2646 tem
= Fplist_get (contact
, QCparity
);
2648 tem
= Fplist_get (p
->childp
, QCparity
);
2649 if (!NILP (tem
) && !EQ (tem
, Qeven
) && !EQ (tem
, Qodd
))
2650 error (":parity must be nil (no parity), `even', or `odd'");
2651 #if defined (PARENB) && defined (PARODD) && defined (IGNPAR) && defined (INPCK)
2652 attr
.c_cflag
&= ~(PARENB
| PARODD
);
2653 attr
.c_iflag
&= ~(IGNPAR
| INPCK
);
2658 else if (EQ (tem
, Qeven
))
2661 attr
.c_cflag
|= PARENB
;
2662 attr
.c_iflag
|= (IGNPAR
| INPCK
);
2664 else if (EQ (tem
, Qodd
))
2667 attr
.c_cflag
|= (PARENB
| PARODD
);
2668 attr
.c_iflag
|= (IGNPAR
| INPCK
);
2671 /* Don't error on no parity, which should be set by cfmakeraw. */
2673 error ("Parity cannot be configured");
2675 childp2
= Fplist_put (childp2
, QCparity
, tem
);
2677 /* Configure stopbits. */
2678 if (!NILP (Fplist_member (contact
, QCstopbits
)))
2679 tem
= Fplist_get (contact
, QCstopbits
);
2681 tem
= Fplist_get (p
->childp
, QCstopbits
);
2683 tem
= make_number (1);
2685 if (XINT (tem
) != 1 && XINT (tem
) != 2)
2686 error (":stopbits must be nil (1 stopbit), 1, or 2");
2687 summary
[2] = XINT (tem
) + '0';
2688 #if defined (CSTOPB)
2689 attr
.c_cflag
&= ~CSTOPB
;
2690 if (XINT (tem
) == 2)
2691 attr
.c_cflag
|= CSTOPB
;
2693 /* Don't error on 1 stopbit, which should be set by cfmakeraw. */
2694 if (XINT (tem
) != 1)
2695 error ("Stopbits cannot be configured");
2697 childp2
= Fplist_put (childp2
, QCstopbits
, tem
);
2699 /* Configure flowcontrol. */
2700 if (!NILP (Fplist_member (contact
, QCflowcontrol
)))
2701 tem
= Fplist_get (contact
, QCflowcontrol
);
2703 tem
= Fplist_get (p
->childp
, QCflowcontrol
);
2704 if (!NILP (tem
) && !EQ (tem
, Qhw
) && !EQ (tem
, Qsw
))
2705 error (":flowcontrol must be nil (no flowcontrol), `hw', or `sw'");
2706 #if defined (CRTSCTS)
2707 attr
.c_cflag
&= ~CRTSCTS
;
2709 #if defined (CNEW_RTSCTS)
2710 attr
.c_cflag
&= ~CNEW_RTSCTS
;
2712 #if defined (IXON) && defined (IXOFF)
2713 attr
.c_iflag
&= ~(IXON
| IXOFF
);
2717 /* Already configured. */
2719 else if (EQ (tem
, Qhw
))
2721 #if defined (CRTSCTS)
2722 attr
.c_cflag
|= CRTSCTS
;
2723 #elif defined (CNEW_RTSCTS)
2724 attr
.c_cflag
|= CNEW_RTSCTS
;
2726 error ("Hardware flowcontrol (RTS/CTS) not supported");
2729 else if (EQ (tem
, Qsw
))
2731 #if defined (IXON) && defined (IXOFF)
2732 attr
.c_iflag
|= (IXON
| IXOFF
);
2734 error ("Software flowcontrol (XON/XOFF) not supported");
2737 childp2
= Fplist_put (childp2
, QCflowcontrol
, tem
);
2739 /* Activate configuration. */
2740 err
= tcsetattr (p
->outfd
, TCSANOW
, &attr
);
2742 report_file_error ("Failed tcsetattr", Qnil
);
2744 childp2
= Fplist_put (childp2
, QCsummary
, build_string (summary
));
2745 pset_childp (p
, childp2
);
2747 #endif /* not DOS_NT */
2749 /* System depended enumeration of and access to system processes a-la ps(1). */
2753 /* Process enumeration and access via /proc. */
2756 list_system_processes (void)
2758 Lisp_Object procdir
, match
, proclist
, next
;
2761 /* For every process on the system, there's a directory in the
2762 "/proc" pseudo-directory whose name is the numeric ID of that
2764 procdir
= build_string ("/proc");
2765 match
= build_string ("[0-9]+");
2766 proclist
= directory_files_internal (procdir
, Qnil
, match
, Qt
, 0, Qnil
);
2768 /* `proclist' gives process IDs as strings. Destructively convert
2769 each string into a number. */
2770 for (tail
= proclist
; CONSP (tail
); tail
= next
)
2773 XSETCAR (tail
, Fstring_to_number (XCAR (tail
), Qnil
));
2776 /* directory_files_internal returns the files in reverse order; undo
2778 proclist
= Fnreverse (proclist
);
2782 #elif defined DARWIN_OS || defined __FreeBSD__
2785 list_system_processes (void)
2788 int mib
[] = {CTL_KERN
, KERN_PROC
, KERN_PROC_ALL
};
2790 int mib
[] = {CTL_KERN
, KERN_PROC
, KERN_PROC_PROC
};
2793 struct kinfo_proc
*procs
;
2796 Lisp_Object proclist
= Qnil
;
2798 if (sysctl (mib
, 3, NULL
, &len
, NULL
, 0) != 0)
2801 procs
= xmalloc (len
);
2802 if (sysctl (mib
, 3, procs
, &len
, NULL
, 0) != 0)
2808 len
/= sizeof (struct kinfo_proc
);
2809 for (i
= 0; i
< len
; i
++)
2812 proclist
= Fcons (make_fixnum_or_float (procs
[i
].kp_proc
.p_pid
), proclist
);
2814 proclist
= Fcons (make_fixnum_or_float (procs
[i
].ki_pid
), proclist
);
2823 /* The WINDOWSNT implementation is in w32.c.
2824 The MSDOS implementation is in dosfns.c. */
2825 #elif !defined (WINDOWSNT) && !defined (MSDOS)
2828 list_system_processes (void)
2833 #endif /* !defined (WINDOWSNT) */
2835 #if defined GNU_LINUX && defined HAVE_LONG_LONG_INT
2836 static struct timespec
2837 time_from_jiffies (unsigned long long tval
, long hz
)
2839 unsigned long long s
= tval
/ hz
;
2840 unsigned long long frac
= tval
% hz
;
2843 if (TYPE_MAXIMUM (time_t) < s
)
2845 if (LONG_MAX
- 1 <= ULLONG_MAX
/ TIMESPEC_RESOLUTION
2846 || frac
<= ULLONG_MAX
/ TIMESPEC_RESOLUTION
)
2847 ns
= frac
* TIMESPEC_RESOLUTION
/ hz
;
2850 /* This is reachable only in the unlikely case that HZ * HZ
2851 exceeds ULLONG_MAX. It calculates an approximation that is
2852 guaranteed to be in range. */
2853 long hz_per_ns
= (hz
/ TIMESPEC_RESOLUTION
2854 + (hz
% TIMESPEC_RESOLUTION
!= 0));
2855 ns
= frac
/ hz_per_ns
;
2858 return make_timespec (s
, ns
);
2862 ltime_from_jiffies (unsigned long long tval
, long hz
)
2864 struct timespec t
= time_from_jiffies (tval
, hz
);
2865 return make_lisp_time (t
);
2868 static struct timespec
2872 struct timespec up
= make_timespec (0, 0);
2875 fup
= emacs_fopen ("/proc/uptime", "r");
2879 unsigned long long upsec
, upfrac
, idlesec
, idlefrac
;
2880 int upfrac_start
, upfrac_end
, idlefrac_start
, idlefrac_end
;
2882 if (fscanf (fup
, "%llu.%n%llu%n %llu.%n%llu%n",
2883 &upsec
, &upfrac_start
, &upfrac
, &upfrac_end
,
2884 &idlesec
, &idlefrac_start
, &idlefrac
, &idlefrac_end
)
2887 if (TYPE_MAXIMUM (time_t) < upsec
)
2889 upsec
= TYPE_MAXIMUM (time_t);
2890 upfrac
= TIMESPEC_RESOLUTION
- 1;
2894 int upfraclen
= upfrac_end
- upfrac_start
;
2895 for (; upfraclen
< LOG10_TIMESPEC_RESOLUTION
; upfraclen
++)
2897 for (; LOG10_TIMESPEC_RESOLUTION
< upfraclen
; upfraclen
--)
2899 upfrac
= min (upfrac
, TIMESPEC_RESOLUTION
- 1);
2901 up
= make_timespec (upsec
, upfrac
);
2910 #define MAJOR(d) (((unsigned)(d) >> 8) & 0xfff)
2911 #define MINOR(d) (((unsigned)(d) & 0xff) | (((unsigned)(d) & 0xfff00000) >> 12))
2914 procfs_ttyname (int rdev
)
2917 char name
[PATH_MAX
];
2920 fdev
= emacs_fopen ("/proc/tty/drivers", "r");
2926 unsigned long minor_beg
, minor_end
;
2927 char minor
[25]; /* 2 32-bit numbers + dash */
2930 for (; !feof (fdev
) && !ferror (fdev
); name
[0] = 0)
2932 if (fscanf (fdev
, "%*s %s %u %s %*s\n", name
, &major
, minor
) >= 3
2933 && major
== MAJOR (rdev
))
2935 minor_beg
= strtoul (minor
, &endp
, 0);
2937 minor_end
= minor_beg
;
2938 else if (*endp
== '-')
2939 minor_end
= strtoul (endp
+ 1, &endp
, 0);
2943 if (MINOR (rdev
) >= minor_beg
&& MINOR (rdev
) <= minor_end
)
2945 sprintf (name
+ strlen (name
), "%u", MINOR (rdev
));
2953 return build_string (name
);
2957 procfs_get_total_memory (void)
2960 uintmax_t retval
= 2 * 1024 * 1024; /* default: 2 GiB */
2964 fmem
= emacs_fopen ("/proc/meminfo", "r");
2968 uintmax_t entry_value
;
2972 switch (fscanf (fmem
, "MemTotal: %"SCNuMAX
, &entry_value
))
2975 retval
= entry_value
;
2980 while ((c
= getc (fmem
)) != EOF
&& c
!= '\n')
2998 system_process_attributes (Lisp_Object pid
)
3000 char procfn
[PATH_MAX
], fn
[PATH_MAX
];
3004 long clocks_per_sec
;
3006 char procbuf
[1025], *p
, *q
;
3009 static char const default_cmd
[] = "???";
3010 const char *cmd
= default_cmd
;
3011 int cmdsize
= sizeof default_cmd
- 1;
3012 char *cmdline
= NULL
;
3013 ptrdiff_t cmdline_size
;
3016 int ppid
, pgrp
, sess
, tty
, tpgid
, thcount
;
3019 unsigned long long u_time
, s_time
, cutime
, cstime
, start
;
3020 long priority
, niceness
, rss
;
3021 unsigned long minflt
, majflt
, cminflt
, cmajflt
, vsize
;
3022 struct timespec tnow
, tstart
, tboot
, telapsed
, us_time
;
3024 Lisp_Object attrs
= Qnil
;
3025 Lisp_Object cmd_str
, decoded_cmd
;
3028 CHECK_NUMBER_OR_FLOAT (pid
);
3029 CONS_TO_INTEGER (pid
, pid_t
, proc_id
);
3030 sprintf (procfn
, "/proc/%"pMd
, proc_id
);
3031 if (stat (procfn
, &st
) < 0)
3036 attrs
= Fcons (Fcons (Qeuid
, make_fixnum_or_float (uid
)), attrs
);
3038 pw
= getpwuid (uid
);
3041 attrs
= Fcons (Fcons (Quser
, build_string (pw
->pw_name
)), attrs
);
3044 attrs
= Fcons (Fcons (Qegid
, make_fixnum_or_float (gid
)), attrs
);
3046 gr
= getgrgid (gid
);
3049 attrs
= Fcons (Fcons (Qgroup
, build_string (gr
->gr_name
)), attrs
);
3051 count
= SPECPDL_INDEX ();
3052 strcpy (fn
, procfn
);
3053 procfn_end
= fn
+ strlen (fn
);
3054 strcpy (procfn_end
, "/stat");
3055 fd
= emacs_open (fn
, O_RDONLY
, 0);
3060 record_unwind_protect_int (close_file_unwind
, fd
);
3061 nread
= emacs_read (fd
, procbuf
, sizeof procbuf
- 1);
3065 procbuf
[nread
] = '\0';
3068 p
= strchr (p
, '(');
3071 q
= strrchr (p
+ 1, ')');
3081 /* Command name is encoded in locale-coding-system; decode it. */
3082 cmd_str
= make_unibyte_string (cmd
, cmdsize
);
3083 decoded_cmd
= code_convert_string_norecord (cmd_str
,
3084 Vlocale_coding_system
, 0);
3085 attrs
= Fcons (Fcons (Qcomm
, decoded_cmd
), attrs
);
3087 /* state ppid pgrp sess tty tpgid . minflt cminflt majflt cmajflt
3088 utime stime cutime cstime priority nice thcount . start vsize rss */
3090 && (sscanf (q
+ 2, ("%c %d %d %d %d %d %*u %lu %lu %lu %lu "
3091 "%Lu %Lu %Lu %Lu %ld %ld %d %*d %Lu %lu %ld"),
3092 &c
, &ppid
, &pgrp
, &sess
, &tty
, &tpgid
,
3093 &minflt
, &cminflt
, &majflt
, &cmajflt
,
3094 &u_time
, &s_time
, &cutime
, &cstime
,
3095 &priority
, &niceness
, &thcount
, &start
, &vsize
, &rss
)
3100 state_str
[1] = '\0';
3101 attrs
= Fcons (Fcons (Qstate
, build_string (state_str
)), attrs
);
3102 attrs
= Fcons (Fcons (Qppid
, make_fixnum_or_float (ppid
)), attrs
);
3103 attrs
= Fcons (Fcons (Qpgrp
, make_fixnum_or_float (pgrp
)), attrs
);
3104 attrs
= Fcons (Fcons (Qsess
, make_fixnum_or_float (sess
)), attrs
);
3105 attrs
= Fcons (Fcons (Qttname
, procfs_ttyname (tty
)), attrs
);
3106 attrs
= Fcons (Fcons (Qtpgid
, make_fixnum_or_float (tpgid
)), attrs
);
3107 attrs
= Fcons (Fcons (Qminflt
, make_fixnum_or_float (minflt
)), attrs
);
3108 attrs
= Fcons (Fcons (Qmajflt
, make_fixnum_or_float (majflt
)), attrs
);
3109 attrs
= Fcons (Fcons (Qcminflt
, make_fixnum_or_float (cminflt
)),
3111 attrs
= Fcons (Fcons (Qcmajflt
, make_fixnum_or_float (cmajflt
)),
3113 clocks_per_sec
= sysconf (_SC_CLK_TCK
);
3114 if (clocks_per_sec
< 0)
3115 clocks_per_sec
= 100;
3116 attrs
= Fcons (Fcons (Qutime
,
3117 ltime_from_jiffies (u_time
, clocks_per_sec
)),
3119 attrs
= Fcons (Fcons (Qstime
,
3120 ltime_from_jiffies (s_time
, clocks_per_sec
)),
3122 attrs
= Fcons (Fcons (Qtime
,
3123 ltime_from_jiffies (s_time
+ u_time
,
3126 attrs
= Fcons (Fcons (Qcutime
,
3127 ltime_from_jiffies (cutime
, clocks_per_sec
)),
3129 attrs
= Fcons (Fcons (Qcstime
,
3130 ltime_from_jiffies (cstime
, clocks_per_sec
)),
3132 attrs
= Fcons (Fcons (Qctime
,
3133 ltime_from_jiffies (cstime
+ cutime
,
3136 attrs
= Fcons (Fcons (Qpri
, make_number (priority
)), attrs
);
3137 attrs
= Fcons (Fcons (Qnice
, make_number (niceness
)), attrs
);
3138 attrs
= Fcons (Fcons (Qthcount
, make_fixnum_or_float (thcount
)),
3140 tnow
= current_timespec ();
3141 telapsed
= get_up_time ();
3142 tboot
= timespec_sub (tnow
, telapsed
);
3143 tstart
= time_from_jiffies (start
, clocks_per_sec
);
3144 tstart
= timespec_add (tboot
, tstart
);
3145 attrs
= Fcons (Fcons (Qstart
, make_lisp_time (tstart
)), attrs
);
3146 attrs
= Fcons (Fcons (Qvsize
, make_fixnum_or_float (vsize
/ 1024)),
3148 attrs
= Fcons (Fcons (Qrss
, make_fixnum_or_float (4 * rss
)), attrs
);
3149 telapsed
= timespec_sub (tnow
, tstart
);
3150 attrs
= Fcons (Fcons (Qetime
, make_lisp_time (telapsed
)), attrs
);
3151 us_time
= time_from_jiffies (u_time
+ s_time
, clocks_per_sec
);
3152 pcpu
= timespectod (us_time
) / timespectod (telapsed
);
3155 attrs
= Fcons (Fcons (Qpcpu
, make_float (100 * pcpu
)), attrs
);
3156 pmem
= 4.0 * 100 * rss
/ procfs_get_total_memory ();
3159 attrs
= Fcons (Fcons (Qpmem
, make_float (pmem
)), attrs
);
3162 unbind_to (count
, Qnil
);
3165 strcpy (procfn_end
, "/cmdline");
3166 fd
= emacs_open (fn
, O_RDONLY
, 0);
3169 ptrdiff_t readsize
, nread_incr
;
3170 record_unwind_protect_int (close_file_unwind
, fd
);
3171 record_unwind_protect_nothing ();
3172 nread
= cmdline_size
= 0;
3176 cmdline
= xpalloc (cmdline
, &cmdline_size
, 2, STRING_BYTES_BOUND
, 1);
3177 set_unwind_protect_ptr (count
+ 1, xfree
, cmdline
);
3179 /* Leave room even if every byte needs escaping below. */
3180 readsize
= (cmdline_size
>> 1) - nread
;
3182 nread_incr
= emacs_read (fd
, cmdline
+ nread
, readsize
);
3183 nread
+= max (0, nread_incr
);
3185 while (nread_incr
== readsize
);
3189 /* We don't want trailing null characters. */
3190 for (p
= cmdline
+ nread
; cmdline
< p
&& !p
[-1]; p
--)
3193 /* Escape-quote whitespace and backslashes. */
3194 q
= cmdline
+ cmdline_size
;
3199 if (c_isspace (c
) || c
== '\\')
3203 nread
= cmdline
+ cmdline_size
- q
;
3208 nread
= cmdsize
+ 2;
3209 cmdline_size
= nread
+ 1;
3210 q
= cmdline
= xrealloc (cmdline
, cmdline_size
);
3211 set_unwind_protect_ptr (count
+ 1, xfree
, cmdline
);
3212 sprintf (cmdline
, "[%.*s]", cmdsize
, cmd
);
3214 /* Command line is encoded in locale-coding-system; decode it. */
3215 cmd_str
= make_unibyte_string (q
, nread
);
3216 decoded_cmd
= code_convert_string_norecord (cmd_str
,
3217 Vlocale_coding_system
, 0);
3218 unbind_to (count
, Qnil
);
3219 attrs
= Fcons (Fcons (Qargs
, decoded_cmd
), attrs
);
3225 #elif defined (SOLARIS2) && defined (HAVE_PROCFS)
3227 /* The <procfs.h> header does not like to be included if _LP64 is defined and
3228 __FILE_OFFSET_BITS == 64. This is an ugly workaround that. */
3229 #if !defined (_LP64) && defined (_FILE_OFFSET_BITS) && (_FILE_OFFSET_BITS == 64)
3230 #define PROCFS_FILE_OFFSET_BITS_HACK 1
3231 #undef _FILE_OFFSET_BITS
3233 #define PROCFS_FILE_OFFSET_BITS_HACK 0
3238 #if PROCFS_FILE_OFFSET_BITS_HACK == 1
3239 #define _FILE_OFFSET_BITS 64
3240 #ifdef _FILE_OFFSET_BITS /* Avoid unused-macro warnings. */
3242 #endif /* PROCFS_FILE_OFFSET_BITS_HACK == 1 */
3245 system_process_attributes (Lisp_Object pid
)
3247 char procfn
[PATH_MAX
], fn
[PATH_MAX
];
3252 struct psinfo pinfo
;
3258 Lisp_Object attrs
= Qnil
;
3259 Lisp_Object decoded_cmd
;
3262 CHECK_NUMBER_OR_FLOAT (pid
);
3263 CONS_TO_INTEGER (pid
, pid_t
, proc_id
);
3264 sprintf (procfn
, "/proc/%"pMd
, proc_id
);
3265 if (stat (procfn
, &st
) < 0)
3270 attrs
= Fcons (Fcons (Qeuid
, make_fixnum_or_float (uid
)), attrs
);
3272 pw
= getpwuid (uid
);
3275 attrs
= Fcons (Fcons (Quser
, build_string (pw
->pw_name
)), attrs
);
3278 attrs
= Fcons (Fcons (Qegid
, make_fixnum_or_float (gid
)), attrs
);
3280 gr
= getgrgid (gid
);
3283 attrs
= Fcons (Fcons (Qgroup
, build_string (gr
->gr_name
)), attrs
);
3285 count
= SPECPDL_INDEX ();
3286 strcpy (fn
, procfn
);
3287 procfn_end
= fn
+ strlen (fn
);
3288 strcpy (procfn_end
, "/psinfo");
3289 fd
= emacs_open (fn
, O_RDONLY
, 0);
3294 record_unwind_protect (close_file_unwind
, fd
);
3295 nread
= emacs_read (fd
, &pinfo
, sizeof pinfo
);
3298 if (nread
== sizeof pinfo
)
3300 attrs
= Fcons (Fcons (Qppid
, make_fixnum_or_float (pinfo
.pr_ppid
)), attrs
);
3301 attrs
= Fcons (Fcons (Qpgrp
, make_fixnum_or_float (pinfo
.pr_pgid
)), attrs
);
3302 attrs
= Fcons (Fcons (Qsess
, make_fixnum_or_float (pinfo
.pr_sid
)), attrs
);
3306 state_str
[0] = pinfo
.pr_lwp
.pr_sname
;
3307 state_str
[1] = '\0';
3308 attrs
= Fcons (Fcons (Qstate
, build_string (state_str
)), attrs
);
3311 /* FIXME: missing Qttyname. psinfo.pr_ttydev is a dev_t,
3312 need to get a string from it. */
3314 /* FIXME: missing: Qtpgid */
3326 Are they available? */
3328 attrs
= Fcons (Fcons (Qtime
, make_lisp_time (pinfo
.pr_time
)), attrs
);
3329 attrs
= Fcons (Fcons (Qctime
, make_lisp_time (pinfo
.pr_ctime
)), attrs
);
3330 attrs
= Fcons (Fcons (Qpri
, make_number (pinfo
.pr_lwp
.pr_pri
)), attrs
);
3331 attrs
= Fcons (Fcons (Qnice
, make_number (pinfo
.pr_lwp
.pr_nice
)), attrs
);
3332 attrs
= Fcons (Fcons (Qthcount
, make_fixnum_or_float (pinfo
.pr_nlwp
)),
3335 attrs
= Fcons (Fcons (Qstart
, make_lisp_time (pinfo
.pr_start
)), attrs
);
3336 attrs
= Fcons (Fcons (Qvsize
, make_fixnum_or_float (pinfo
.pr_size
)),
3338 attrs
= Fcons (Fcons (Qrss
, make_fixnum_or_float (pinfo
.pr_rssize
)),
3341 /* pr_pctcpu and pr_pctmem are unsigned integers in the
3342 range 0 .. 2**15, representing 0.0 .. 1.0. */
3343 attrs
= Fcons (Fcons (Qpcpu
,
3344 make_float (100.0 / 0x8000 * pinfo
.pr_pctcpu
)),
3346 attrs
= Fcons (Fcons (Qpmem
,
3347 make_float (100.0 / 0x8000 * pinfo
.pr_pctmem
)),
3350 decoded_cmd
= (code_convert_string_norecord
3351 (build_unibyte_string (pinfo
.pr_fname
),
3352 Vlocale_coding_system
, 0));
3353 attrs
= Fcons (Fcons (Qcomm
, decoded_cmd
), attrs
);
3354 decoded_cmd
= (code_convert_string_norecord
3355 (build_unibyte_string (pinfo
.pr_psargs
),
3356 Vlocale_coding_system
, 0));
3357 attrs
= Fcons (Fcons (Qargs
, decoded_cmd
), attrs
);
3359 unbind_to (count
, Qnil
);
3363 #elif defined __FreeBSD__
3365 static struct timespec
3366 timeval_to_timespec (struct timeval t
)
3368 return make_timespec (t
.tv_sec
, t
.tv_usec
* 1000);
3372 make_lisp_timeval (struct timeval t
)
3374 return make_lisp_time (timeval_to_timespec (t
));
3378 system_process_attributes (Lisp_Object pid
)
3381 int pagesize
= getpagesize ();
3382 unsigned long npages
;
3388 char args
[MAXPATHLEN
];
3389 struct timespec t
, now
;
3391 int mib
[4] = {CTL_KERN
, KERN_PROC
, KERN_PROC_PID
};
3392 struct kinfo_proc proc
;
3393 size_t proclen
= sizeof proc
;
3395 Lisp_Object attrs
= Qnil
;
3396 Lisp_Object decoded_comm
;
3398 CHECK_NUMBER_OR_FLOAT (pid
);
3399 CONS_TO_INTEGER (pid
, int, proc_id
);
3402 if (sysctl (mib
, 4, &proc
, &proclen
, NULL
, 0) != 0)
3405 attrs
= Fcons (Fcons (Qeuid
, make_fixnum_or_float (proc
.ki_uid
)), attrs
);
3408 pw
= getpwuid (proc
.ki_uid
);
3411 attrs
= Fcons (Fcons (Quser
, build_string (pw
->pw_name
)), attrs
);
3413 attrs
= Fcons (Fcons (Qegid
, make_fixnum_or_float (proc
.ki_svgid
)), attrs
);
3416 gr
= getgrgid (proc
.ki_svgid
);
3419 attrs
= Fcons (Fcons (Qgroup
, build_string (gr
->gr_name
)), attrs
);
3421 decoded_comm
= (code_convert_string_norecord
3422 (build_unibyte_string (proc
.ki_comm
),
3423 Vlocale_coding_system
, 0));
3425 attrs
= Fcons (Fcons (Qcomm
, decoded_comm
), attrs
);
3427 char state
[2] = {'\0', '\0'};
3428 switch (proc
.ki_stat
)
3450 attrs
= Fcons (Fcons (Qstate
, build_string (state
)), attrs
);
3453 attrs
= Fcons (Fcons (Qppid
, make_fixnum_or_float (proc
.ki_ppid
)), attrs
);
3454 attrs
= Fcons (Fcons (Qpgrp
, make_fixnum_or_float (proc
.ki_pgid
)), attrs
);
3455 attrs
= Fcons (Fcons (Qsess
, make_fixnum_or_float (proc
.ki_sid
)), attrs
);
3458 ttyname
= proc
.ki_tdev
== NODEV
? NULL
: devname (proc
.ki_tdev
, S_IFCHR
);
3461 attrs
= Fcons (Fcons (Qtty
, build_string (ttyname
)), attrs
);
3463 attrs
= Fcons (Fcons (Qtpgid
, make_fixnum_or_float (proc
.ki_tpgid
)), attrs
);
3464 attrs
= Fcons (Fcons (Qminflt
, make_fixnum_or_float (proc
.ki_rusage
.ru_minflt
)), attrs
);
3465 attrs
= Fcons (Fcons (Qmajflt
, make_fixnum_or_float (proc
.ki_rusage
.ru_majflt
)), attrs
);
3466 attrs
= Fcons (Fcons (Qcminflt
, make_number (proc
.ki_rusage_ch
.ru_minflt
)), attrs
);
3467 attrs
= Fcons (Fcons (Qcmajflt
, make_number (proc
.ki_rusage_ch
.ru_majflt
)), attrs
);
3469 attrs
= Fcons (Fcons (Qutime
, make_lisp_timeval (proc
.ki_rusage
.ru_utime
)),
3471 attrs
= Fcons (Fcons (Qstime
, make_lisp_timeval (proc
.ki_rusage
.ru_stime
)),
3473 t
= timespec_add (timeval_to_timespec (proc
.ki_rusage
.ru_utime
),
3474 timeval_to_timespec (proc
.ki_rusage
.ru_stime
));
3475 attrs
= Fcons (Fcons (Qtime
, make_lisp_time (t
)), attrs
);
3477 attrs
= Fcons (Fcons (Qcutime
,
3478 make_lisp_timeval (proc
.ki_rusage_ch
.ru_utime
)),
3480 attrs
= Fcons (Fcons (Qcstime
,
3481 make_lisp_timeval (proc
.ki_rusage_ch
.ru_utime
)),
3483 t
= timespec_add (timeval_to_timespec (proc
.ki_rusage_ch
.ru_utime
),
3484 timeval_to_timespec (proc
.ki_rusage_ch
.ru_stime
));
3485 attrs
= Fcons (Fcons (Qctime
, make_lisp_time (t
)), attrs
);
3487 attrs
= Fcons (Fcons (Qthcount
, make_fixnum_or_float (proc
.ki_numthreads
)),
3489 attrs
= Fcons (Fcons (Qpri
, make_number (proc
.ki_pri
.pri_native
)), attrs
);
3490 attrs
= Fcons (Fcons (Qnice
, make_number (proc
.ki_nice
)), attrs
);
3491 attrs
= Fcons (Fcons (Qstart
, make_lisp_timeval (proc
.ki_start
)), attrs
);
3492 attrs
= Fcons (Fcons (Qvsize
, make_number (proc
.ki_size
>> 10)), attrs
);
3493 attrs
= Fcons (Fcons (Qrss
, make_number (proc
.ki_rssize
* pagesize
>> 10)),
3496 now
= current_timespec ();
3497 t
= timespec_sub (now
, timeval_to_timespec (proc
.ki_start
));
3498 attrs
= Fcons (Fcons (Qetime
, make_lisp_time (t
)), attrs
);
3500 len
= sizeof fscale
;
3501 if (sysctlbyname ("kern.fscale", &fscale
, &len
, NULL
, 0) == 0)
3506 if (sysctlbyname ("kern.ccpu", &ccpu
, &len
, NULL
, 0) == 0)
3508 pcpu
= (100.0 * proc
.ki_pctcpu
/ fscale
3509 / (1 - exp (proc
.ki_swtime
* log ((double) ccpu
/ fscale
))));
3510 attrs
= Fcons (Fcons (Qpcpu
, make_fixnum_or_float (pcpu
)), attrs
);
3514 len
= sizeof npages
;
3515 if (sysctlbyname ("hw.availpages", &npages
, &len
, NULL
, 0) == 0)
3517 double pmem
= (proc
.ki_flag
& P_INMEM
3518 ? 100.0 * proc
.ki_rssize
/ npages
3520 attrs
= Fcons (Fcons (Qpmem
, make_fixnum_or_float (pmem
)), attrs
);
3523 mib
[2] = KERN_PROC_ARGS
;
3525 if (sysctl (mib
, 4, args
, &len
, NULL
, 0) == 0)
3528 for (i
= 0; i
< len
; i
++)
3530 if (! args
[i
] && i
< len
- 1)
3535 (code_convert_string_norecord
3536 (build_unibyte_string (args
),
3537 Vlocale_coding_system
, 0));
3539 attrs
= Fcons (Fcons (Qargs
, decoded_comm
), attrs
);
3545 /* The WINDOWSNT implementation is in w32.c.
3546 The MSDOS implementation is in dosfns.c. */
3547 #elif !defined (WINDOWSNT) && !defined (MSDOS)
3550 system_process_attributes (Lisp_Object pid
)
3555 #endif /* !defined (WINDOWSNT) */
3557 /* Wide character string collation. */
3559 #ifdef __STDC_ISO_10646__
3561 # include <wctype.h>
3563 # if defined HAVE_NEWLOCALE || defined HAVE_SETLOCALE
3564 # include <locale.h>
3567 # define LC_COLLATE 0
3569 # ifndef LC_COLLATE_MASK
3570 # define LC_COLLATE_MASK 0
3575 # ifndef LC_CTYPE_MASK
3576 # define LC_CTYPE_MASK 0
3579 # ifndef HAVE_NEWLOCALE
3585 # define freelocale emacs_freelocale
3586 # define locale_t emacs_locale_t
3587 # define newlocale emacs_newlocale
3588 # define wcscoll_l emacs_wcscoll_l
3589 # define towlower_l emacs_towlower_l
3591 typedef char const *locale_t
;
3594 newlocale (int category_mask
, char const *locale
, locale_t loc
)
3600 freelocale (locale_t loc
)
3605 emacs_setlocale (int category
, char const *locale
)
3607 # ifdef HAVE_SETLOCALE
3609 char *loc
= setlocale (category
, locale
);
3620 wcscoll_l (wchar_t const *a
, wchar_t const *b
, locale_t loc
)
3623 char *oldloc
= emacs_setlocale (LC_COLLATE
, NULL
);
3631 char *oldcopy
= SAFE_ALLOCA (strlen (oldloc
) + 1);
3632 strcpy (oldcopy
, oldloc
);
3633 if (! emacs_setlocale (LC_COLLATE
, loc
))
3638 result
= wcscoll (a
, b
);
3640 if (! emacs_setlocale (LC_COLLATE
, oldcopy
))
3651 towlower_l (wint_t wc
, locale_t loc
)
3654 char *oldloc
= emacs_setlocale (LC_CTYPE
, NULL
);
3659 char *oldcopy
= SAFE_ALLOCA (strlen (oldloc
) + 1);
3660 strcpy (oldcopy
, oldloc
);
3661 if (emacs_setlocale (LC_CTYPE
, loc
))
3663 result
= towlower (wc
);
3664 emacs_setlocale (LC_COLLATE
, oldcopy
);
3674 str_collate (Lisp_Object s1
, Lisp_Object s2
,
3675 Lisp_Object locale
, Lisp_Object ignore_case
)
3678 ptrdiff_t len
, i
, i_byte
;
3683 /* Convert byte stream to code points. */
3684 len
= SCHARS (s1
); i
= i_byte
= 0;
3685 SAFE_NALLOCA (p1
, 1, len
+ 1);
3687 FETCH_STRING_CHAR_ADVANCE (*(p1
+i
-1), s1
, i
, i_byte
);
3690 len
= SCHARS (s2
); i
= i_byte
= 0;
3691 SAFE_NALLOCA (p2
, 1, len
+ 1);
3693 FETCH_STRING_CHAR_ADVANCE (*(p2
+i
-1), s2
, i
, i_byte
);
3696 if (STRINGP (locale
))
3698 locale_t loc
= newlocale (LC_COLLATE_MASK
| LC_CTYPE_MASK
,
3699 SSDATA (locale
), 0);
3701 error ("Invalid locale %s: %s", SSDATA (locale
), strerror (errno
));
3703 if (! NILP (ignore_case
))
3704 for (int i
= 1; i
< 3; i
++)
3706 wchar_t *p
= (i
== 1) ? p1
: p2
;
3708 *p
= towlower_l (*p
, loc
);
3712 res
= wcscoll_l (p1
, p2
, loc
);
3718 if (! NILP (ignore_case
))
3719 for (int i
= 1; i
< 3; i
++)
3721 wchar_t *p
= (i
== 1) ? p1
: p2
;
3727 res
= wcscoll (p1
, p2
);
3730 # ifndef HAVE_NEWLOCALE
3732 error ("Invalid locale or string for collation: %s", strerror (err
));
3735 error ("Invalid string for collation: %s", strerror (err
));
3741 #endif /* __STDC_ISO_10646__ */
3745 str_collate (Lisp_Object s1
, Lisp_Object s2
,
3746 Lisp_Object locale
, Lisp_Object ignore_case
)
3749 char *loc
= STRINGP (locale
) ? SSDATA (locale
) : NULL
;
3750 int res
, err
= errno
;
3753 res
= w32_compare_strings (SDATA (s1
), SDATA (s2
), loc
, !NILP (ignore_case
));
3755 error ("Invalid string for collation: %s", strerror (errno
));
3760 #endif /* WINDOWSNT */