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 #if 0x020c00 <= GNUTLS_VERSION_NUMBER && !defined WINDOWSNT
104 # include <gnutls/crypto.h>
106 # define emacs_gnutls_global_init() Qnil
107 # define gnutls_rnd(level, data, len) (-1)
112 /* In process.h which conflicts with the local copy. */
114 int _cdecl
_spawnlp (int, const char *, const char *, ...);
115 int _cdecl
_getpid (void);
116 /* The following is needed for O_CLOEXEC, F_SETFD, FD_CLOEXEC, and
117 several prototypes of functions called below. */
118 #include <sys/socket.h>
121 #include "syssignal.h"
124 /* ULLONG_MAX is missing on Red Hat Linux 7.3; see Bug#11781. */
126 #define ULLONG_MAX TYPE_MAXIMUM (unsigned long long int)
129 /* Declare here, including term.h is problematic on some systems. */
130 extern void tputs (const char *, int, int (*)(int));
132 static const int baud_convert
[] =
134 0, 50, 75, 110, 135, 150, 200, 300, 600, 1200,
135 1800, 2400, 4800, 9600, 19200, 38400
138 #if !defined HAVE_GET_CURRENT_DIR_NAME || defined BROKEN_GET_CURRENT_DIR_NAME \
139 || (defined HYBRID_GET_CURRENT_DIR_NAME)
140 /* Return the current working directory. Returns NULL on errors.
141 Any other returned value must be freed with free. This is used
142 only when get_current_dir_name is not defined on the system. */
144 get_current_dir_name (void)
147 char *pwd
= getenv ("PWD");
148 struct stat dotstat
, pwdstat
;
149 /* If PWD is accurate, use it instead of calling getcwd. PWD is
150 sometimes a nicer name, and using it may avoid a fatal error if a
151 parent directory is searchable but not readable. */
153 && (IS_DIRECTORY_SEP (*pwd
) || (*pwd
&& IS_DEVICE_SEP (pwd
[1])))
154 && stat (pwd
, &pwdstat
) == 0
155 && stat (".", &dotstat
) == 0
156 && dotstat
.st_ino
== pwdstat
.st_ino
157 && dotstat
.st_dev
== pwdstat
.st_dev
159 && strlen (pwd
) < MAXPATHLEN
163 buf
= malloc (strlen (pwd
) + 1);
170 size_t buf_size
= 1024;
171 buf
= malloc (buf_size
);
176 if (getcwd (buf
, buf_size
) == buf
)
180 int tmp_errno
= errno
;
186 buf
= realloc (buf
, buf_size
);
196 /* Discard pending input on all input descriptors. */
199 discard_tty_input (void)
202 struct emacs_tty buf
;
207 #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */
208 while (dos_keyread () != -1)
210 #else /* not MSDOS */
212 struct tty_display_info
*tty
;
213 for (tty
= tty_list
; tty
; tty
= tty
->next
)
215 if (tty
->input
) /* Is the device suspended? */
217 emacs_get_tty (fileno (tty
->input
), &buf
);
218 emacs_set_tty (fileno (tty
->input
), &buf
, 0);
222 #endif /* not MSDOS */
223 #endif /* not WINDOWSNT */
229 /* Arrange for character C to be read as the next input from
231 XXX What if we have multiple ttys?
237 if (! (FRAMEP (selected_frame
)
238 && FRAME_LIVE_P (XFRAME (selected_frame
))
239 && FRAME_TERMCAP_P (XFRAME (selected_frame
))))
242 /* Should perhaps error if in batch mode */
244 ioctl (fileno (CURTTY()->input
), TIOCSTI
, &c
);
245 #else /* no TIOCSTI */
246 error ("Cannot stuff terminal input characters in this version of Unix");
247 #endif /* no TIOCSTI */
253 init_baud_rate (int fd
)
263 #else /* not DOS_NT */
268 emacs_ospeed
= cfgetospeed (&sg
);
269 #endif /* not DOS_NT */
272 baud_rate
= (emacs_ospeed
< ARRAYELTS (baud_convert
)
273 ? baud_convert
[emacs_ospeed
] : 9600);
282 /* Wait for the subprocess with process id CHILD to terminate or change status.
283 CHILD must be a child process that has not been reaped.
284 If STATUS is non-null, store the waitpid-style exit status into *STATUS
285 and tell wait_reading_process_output that it needs to look around.
286 Use waitpid-style OPTIONS when waiting.
287 If INTERRUPTIBLE, this function is interruptible by a signal.
289 Return CHILD if successful, 0 if no status is available;
290 the latter is possible only when options & NOHANG. */
292 get_child_status (pid_t child
, int *status
, int options
, bool interruptible
)
296 /* Invoke waitpid only with a known process ID; do not invoke
297 waitpid with a nonpositive argument. Otherwise, Emacs might
298 reap an unwanted process by mistake. For example, invoking
299 waitpid (-1, ...) can mess up glib by reaping glib's subprocesses,
300 so that another thread running glib won't find them. */
303 while ((pid
= waitpid (child
, status
, options
)) < 0)
305 /* Check that CHILD is a child process that has not been reaped,
306 and that STATUS and OPTIONS are valid. Otherwise abort,
307 as continuing after this internal error could cause Emacs to
308 become confused and kill innocent-victim processes. */
312 /* Note: the MS-Windows emulation of waitpid calls QUIT
318 /* If successful and status is requested, tell wait_reading_process_output
319 that it needs to wake up and look around. */
320 if (pid
&& status
&& input_available_clear_time
)
321 *input_available_clear_time
= make_timespec (0, 0);
326 /* Wait for the subprocess with process id CHILD to terminate.
327 CHILD must be a child process that has not been reaped.
328 If STATUS is non-null, store the waitpid-style exit status into *STATUS
329 and tell wait_reading_process_output that it needs to look around.
330 If INTERRUPTIBLE, this function is interruptible by a signal. */
332 wait_for_termination (pid_t child
, int *status
, bool interruptible
)
334 get_child_status (child
, status
, 0, interruptible
);
337 /* Report whether the subprocess with process id CHILD has changed status.
338 Termination counts as a change of status.
339 CHILD must be a child process that has not been reaped.
340 If STATUS is non-null, store the waitpid-style exit status into *STATUS
341 and tell wait_reading_process_output that it needs to look around.
342 Use waitpid-style OPTIONS to check status, but do not wait.
344 Return CHILD if successful, 0 if no status is available because
345 the process's state has not changed. */
347 child_status_changed (pid_t child
, int *status
, int options
)
349 return get_child_status (child
, status
, WNOHANG
| options
, 0);
353 /* Set up the terminal at the other end of a pseudo-terminal that
354 we will be controlling an inferior through.
355 It should not echo or do line-editing, since that is done
356 in Emacs. No padding needed for insertion into an Emacs buffer. */
359 child_setup_tty (int out
)
364 emacs_get_tty (out
, &s
);
365 s
.main
.c_oflag
|= OPOST
; /* Enable output postprocessing */
366 s
.main
.c_oflag
&= ~ONLCR
; /* Disable map of NL to CR-NL on output */
368 /* http://lists.gnu.org/archive/html/emacs-devel/2008-05/msg00406.html
369 Some versions of GNU Hurd do not have FFDLY? */
371 s
.main
.c_oflag
&= ~(NLDLY
|CRDLY
|TABDLY
|BSDLY
|VTDLY
|FFDLY
);
372 /* No output delays */
374 s
.main
.c_oflag
&= ~(NLDLY
|CRDLY
|TABDLY
|BSDLY
|VTDLY
);
375 /* No output delays */
378 s
.main
.c_lflag
&= ~ECHO
; /* Disable echo */
379 s
.main
.c_lflag
|= ISIG
; /* Enable signals */
381 s
.main
.c_iflag
&= ~IUCLC
; /* Disable downcasing on input. */
384 s
.main
.c_iflag
&= ~ISTRIP
; /* don't strip 8th bit on input */
387 s
.main
.c_oflag
&= ~OLCUC
; /* Disable upcasing on output. */
389 s
.main
.c_oflag
&= ~TAB3
; /* Disable tab expansion */
390 s
.main
.c_cflag
= (s
.main
.c_cflag
& ~CSIZE
) | CS8
; /* Don't strip 8th bit */
391 s
.main
.c_cc
[VERASE
] = CDISABLE
; /* disable erase processing */
392 s
.main
.c_cc
[VKILL
] = CDISABLE
; /* disable kill processing */
395 s
.main
.c_cflag
= (s
.main
.c_cflag
& ~CBAUD
) | B9600
; /* baud rate sanity */
398 #ifdef SIGNALS_VIA_CHARACTERS
399 /* the QUIT and INTR character are used in process_send_signal
400 so set them here to something useful. */
401 if (s
.main
.c_cc
[VQUIT
] == CDISABLE
)
402 s
.main
.c_cc
[VQUIT
] = '\\'&037; /* Control-\ */
403 if (s
.main
.c_cc
[VINTR
] == CDISABLE
)
404 s
.main
.c_cc
[VINTR
] = 'C'&037; /* Control-C */
405 #endif /* not SIGNALS_VIA_CHARACTERS */
408 /* Also, PTY overloads NUL and BREAK.
409 don't ignore break, but don't signal either, so it looks like NUL. */
410 s
.main
.c_iflag
&= ~IGNBRK
;
411 s
.main
.c_iflag
&= ~BRKINT
;
412 /* rms: Formerly it set s.main.c_cc[VINTR] to 0377 here
413 unconditionally. Then a SIGNALS_VIA_CHARACTERS conditional
414 would force it to 0377. That looks like duplicated code. */
415 s
.main
.c_cflag
= (s
.main
.c_cflag
& ~CBAUD
) | B9600
; /* baud rate sanity */
418 /* We originally enabled ICANON (and set VEOF to 04), and then had
419 process.c send additional EOF chars to flush the output when faced
420 with long lines, but this leads to weird effects when the
421 subprocess has disabled ICANON and ends up seeing those spurious
422 extra EOFs. So we don't send EOFs any more in
423 process.c:send_process. First we tried to disable ICANON by
424 default, so if a subsprocess sets up ICANON, it's his problem (or
425 the Elisp package that talks to it) to deal with lines that are
426 too long. But this disables some features, such as the ability
427 to send EOF signals. So we re-enabled ICANON but there is no
428 more "send eof to flush" going on (which is wrong and unportable
429 in itself). The correct way to handle too much output is to
430 buffer what could not be written and then write it again when
431 select returns ok for writing. This has it own set of
432 problems. Write is now asynchronous, is that a problem? How much
433 do we buffer, and what do we do when that limit is reached? */
435 s
.main
.c_lflag
|= ICANON
; /* Enable line editing and eof processing */
436 s
.main
.c_cc
[VEOF
] = 'D'&037; /* Control-D */
437 #if 0 /* These settings only apply to non-ICANON mode. */
438 s
.main
.c_cc
[VMIN
] = 1;
439 s
.main
.c_cc
[VTIME
] = 0;
442 emacs_set_tty (out
, &s
, 0);
443 #endif /* not WINDOWSNT */
445 #endif /* not MSDOS */
448 /* Record a signal code and the action for it. */
452 struct sigaction action
;
455 static void save_signal_handlers (struct save_signal
*);
456 static void restore_signal_handlers (struct save_signal
*);
458 /* Suspend the Emacs process; give terminal to its superior. */
466 /* On a system where suspending is not implemented,
467 instead fork a subshell and let it talk directly to the terminal
474 /* Fork a subshell. */
479 #ifdef DOS_NT /* Demacs 1.1.2 91/10/20 Manabu Higashida */
482 char oldwd
[MAXPATHLEN
+1]; /* Fixed length is safe on MSDOS. */
484 char oldwd
[MAX_UTF8_PATH
];
489 struct save_signal saved_handlers
[5];
490 char *str
= SSDATA (encode_current_directory ());
496 char *volatile str_volatile
= str
;
503 error ("Can't spawn subshell");
505 saved_handlers
[0].code
= SIGINT
;
506 saved_handlers
[1].code
= SIGQUIT
;
507 saved_handlers
[2].code
= SIGTERM
;
509 saved_handlers
[3].code
= SIGIO
;
510 saved_handlers
[4].code
= 0;
512 saved_handlers
[3].code
= 0;
516 save_signal_handlers (saved_handlers
);
523 #ifdef DOS_NT /* MW, Aug 1993 */
524 getcwd (oldwd
, sizeof oldwd
);
526 sh
= egetenv ("SUSPEND"); /* KFS, 1994-12-14 */
529 sh
= egetenv ("SHELL");
533 /* Use our buffer's default directory for the subshell. */
534 if (chdir (str
) != 0)
538 _exit (EXIT_CANCELED
);
542 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */
544 char *epwd
= getenv ("PWD");
545 char old_pwd
[MAXPATHLEN
+1+4];
547 /* If PWD is set, pass it with corrected value. */
550 strcpy (old_pwd
, epwd
);
551 setenv ("PWD", str
, 1);
554 chdir (oldwd
); /* FIXME: Do the right thing on chdir failure. */
556 putenv (old_pwd
); /* restore previous value */
558 #else /* not MSDOS */
560 /* Waits for process completion */
561 pid
= _spawnlp (_P_WAIT
, sh
, sh
, NULL
);
562 chdir (oldwd
); /* FIXME: Do the right thing on chdir failure. */
564 write (1, "Can't execute subshell", 22);
565 #else /* not WINDOWSNT */
566 execlp (sh
, sh
, (char *) 0);
568 _exit (errno
== ENOENT
? EXIT_ENOENT
: EXIT_CANNOT_INVOKE
);
569 #endif /* not WINDOWSNT */
570 #endif /* not MSDOS */
573 /* Do this now if we did not do it before. */
575 save_signal_handlers (saved_handlers
);
579 wait_for_termination (pid
, &status
, 0);
581 restore_signal_handlers (saved_handlers
);
585 save_signal_handlers (struct save_signal
*saved_handlers
)
587 while (saved_handlers
->code
)
589 struct sigaction action
;
590 emacs_sigaction_init (&action
, SIG_IGN
);
591 sigaction (saved_handlers
->code
, &action
, &saved_handlers
->action
);
597 restore_signal_handlers (struct save_signal
*saved_handlers
)
599 while (saved_handlers
->code
)
601 sigaction (saved_handlers
->code
, &saved_handlers
->action
, 0);
607 static int old_fcntl_flags
[FD_SETSIZE
];
614 old_fcntl_flags
[fd
] = fcntl (fd
, F_GETFL
, 0) & ~FASYNC
;
615 fcntl (fd
, F_SETFL
, old_fcntl_flags
[fd
] | FASYNC
);
616 interrupts_deferred
= 0;
625 fcntl (fd
, F_SETFL
, old_fcntl_flags
[fd
]);
639 sigemptyset (&unblocked
);
641 sigaddset (&unblocked
, SIGWINCH
);
643 sigaddset (&unblocked
, SIGIO
);
644 pthread_sigmask (SIG_UNBLOCK
, &unblocked
, 0);
646 interrupts_deferred
= 0;
651 unrequest_sigio (void)
659 sigemptyset (&blocked
);
661 sigaddset (&blocked
, SIGWINCH
);
663 sigaddset (&blocked
, SIGIO
);
664 pthread_sigmask (SIG_BLOCK
, &blocked
, 0);
665 interrupts_deferred
= 1;
673 block_child_signal (sigset_t
*oldset
)
676 sigemptyset (&blocked
);
677 sigaddset (&blocked
, SIGCHLD
);
678 sigaddset (&blocked
, SIGINT
);
679 pthread_sigmask (SIG_BLOCK
, &blocked
, oldset
);
682 /* Unblock SIGCHLD. */
685 unblock_child_signal (sigset_t
const *oldset
)
687 pthread_sigmask (SIG_SETMASK
, oldset
, 0);
692 /* Saving and restoring the process group of Emacs's terminal. */
694 /* The process group of which Emacs was a member when it initially
697 If Emacs was in its own process group (i.e. inherited_pgroup ==
698 getpid ()), then we know we're running under a shell with job
699 control (Emacs would never be run as part of a pipeline).
702 If Emacs was not in its own process group, then we know we're
703 running under a shell (or a caller) that doesn't know how to
704 separate itself from Emacs (like sh). Emacs must be in its own
705 process group in order to receive SIGIO correctly. In this
706 situation, we put ourselves in our own pgroup, forcibly set the
707 tty's pgroup to our pgroup, and make sure to restore and reinstate
708 the tty's pgroup just like any other terminal setting. If
709 inherited_group was not the tty's pgroup, then we'll get a
710 SIGTTmumble when we try to change the tty's pgroup, and a CONT if
711 it goes foreground in the future, which is what should happen. */
713 static pid_t inherited_pgroup
;
716 init_foreground_group (void)
718 pid_t pgrp
= getpgrp ();
719 inherited_pgroup
= getpid () == pgrp
? 0 : pgrp
;
722 /* Block and unblock SIGTTOU. */
725 block_tty_out_signal (sigset_t
*oldset
)
729 sigemptyset (&blocked
);
730 sigaddset (&blocked
, SIGTTOU
);
731 pthread_sigmask (SIG_BLOCK
, &blocked
, oldset
);
736 unblock_tty_out_signal (sigset_t
const *oldset
)
739 pthread_sigmask (SIG_SETMASK
, oldset
, 0);
743 /* Safely set a controlling terminal FD's process group to PGID.
744 If we are not in the foreground already, POSIX requires tcsetpgrp
745 to deliver a SIGTTOU signal, which would stop us. This is an
746 annoyance, so temporarily ignore the signal.
748 In practice, platforms lacking SIGTTOU also lack tcsetpgrp, so
749 skip all this unless SIGTTOU is defined. */
751 tcsetpgrp_without_stopping (int fd
, pid_t pgid
)
756 block_tty_out_signal (&oldset
);
757 tcsetpgrp (fd
, pgid
);
758 unblock_tty_out_signal (&oldset
);
763 /* Split off the foreground process group to Emacs alone. When we are
764 in the foreground, but not started in our own process group,
765 redirect the tty device handle FD to point to our own process
766 group. FD must be the file descriptor of the controlling tty. */
768 narrow_foreground_group (int fd
)
770 if (inherited_pgroup
&& setpgid (0, 0) == 0)
771 tcsetpgrp_without_stopping (fd
, getpid ());
774 /* Set the tty to our original foreground group. */
776 widen_foreground_group (int fd
)
778 if (inherited_pgroup
&& setpgid (0, inherited_pgroup
) == 0)
779 tcsetpgrp_without_stopping (fd
, inherited_pgroup
);
782 /* Getting and setting emacs_tty structures. */
784 /* Set *TC to the parameters associated with the terminal FD,
785 or clear it if the parameters are not available.
786 Return 0 on success, -1 on failure. */
788 emacs_get_tty (int fd
, struct emacs_tty
*settings
)
790 /* Retrieve the primary parameters - baud rate, character size, etcetera. */
791 memset (&settings
->main
, 0, sizeof (settings
->main
));
794 HANDLE h
= (HANDLE
)_get_osfhandle (fd
);
797 if (h
&& h
!= INVALID_HANDLE_VALUE
&& GetConsoleMode (h
, &console_mode
))
799 settings
->main
= console_mode
;
802 #endif /* WINDOWSNT */
805 /* We have those nifty POSIX tcmumbleattr functions. */
806 return tcgetattr (fd
, &settings
->main
);
811 /* Set the parameters of the tty on FD according to the contents of
812 *SETTINGS. If FLUSHP, discard input.
813 Return 0 if all went well, and -1 (setting errno) if anything failed. */
816 emacs_set_tty (int fd
, struct emacs_tty
*settings
, bool flushp
)
818 /* Set the primary parameters - baud rate, character size, etcetera. */
821 HANDLE h
= (HANDLE
)_get_osfhandle (fd
);
823 if (h
&& h
!= INVALID_HANDLE_VALUE
)
827 /* Assume the handle is open for input. */
829 FlushConsoleInputBuffer (h
);
830 new_mode
= settings
->main
;
831 SetConsoleMode (h
, new_mode
);
833 #endif /* WINDOWSNT */
836 /* We have those nifty POSIX tcmumbleattr functions.
837 William J. Smith <wjs@wiis.wang.com> writes:
838 "POSIX 1003.1 defines tcsetattr to return success if it was
839 able to perform any of the requested actions, even if some
840 of the requested actions could not be performed.
841 We must read settings back to ensure tty setup properly.
842 AIX requires this to keep tty from hanging occasionally." */
843 /* This make sure that we don't loop indefinitely in here. */
844 for (i
= 0 ; i
< 10 ; i
++)
845 if (tcsetattr (fd
, flushp
? TCSAFLUSH
: TCSADRAIN
, &settings
->main
) < 0)
856 memset (&new, 0, sizeof (new));
857 /* Get the current settings, and see if they're what we asked for. */
858 tcgetattr (fd
, &new);
859 /* We cannot use memcmp on the whole structure here because under
860 * aix386 the termios structure has some reserved field that may
863 if ( new.c_iflag
== settings
->main
.c_iflag
864 && new.c_oflag
== settings
->main
.c_oflag
865 && new.c_cflag
== settings
->main
.c_cflag
866 && new.c_lflag
== settings
->main
.c_lflag
867 && memcmp (new.c_cc
, settings
->main
.c_cc
, NCCS
) == 0)
874 /* We have survived the tempest. */
881 static int old_fcntl_owner
[FD_SETSIZE
];
882 #endif /* F_SETOWN */
884 /* This may also be defined in stdio,
885 but if so, this does no harm,
886 and using the same name avoids wasting the other one's space. */
889 unsigned char _sobuf
[BUFSIZ
+8];
894 /* Initialize the terminal mode on all tty devices that are currently
898 init_all_sys_modes (void)
900 struct tty_display_info
*tty
;
901 for (tty
= tty_list
; tty
; tty
= tty
->next
)
902 init_sys_modes (tty
);
905 /* Initialize the terminal mode on the given tty device. */
908 init_sys_modes (struct tty_display_info
*tty_out
)
910 struct emacs_tty tty
;
911 Lisp_Object terminal
;
913 Vtty_erase_char
= Qnil
;
918 if (!tty_out
->output
)
919 return; /* The tty is suspended. */
921 narrow_foreground_group (fileno (tty_out
->input
));
923 if (! tty_out
->old_tty
)
924 tty_out
->old_tty
= xmalloc (sizeof *tty_out
->old_tty
);
926 emacs_get_tty (fileno (tty_out
->input
), tty_out
->old_tty
);
928 tty
= *tty_out
->old_tty
;
930 #if !defined (DOS_NT)
931 XSETINT (Vtty_erase_char
, tty
.main
.c_cc
[VERASE
]);
933 tty
.main
.c_iflag
|= (IGNBRK
); /* Ignore break condition */
934 tty
.main
.c_iflag
&= ~ICRNL
; /* Disable map of CR to NL on input */
935 #ifdef INLCR /* I'm just being cautious,
936 since I can't check how widespread INLCR is--rms. */
937 tty
.main
.c_iflag
&= ~INLCR
; /* Disable map of NL to CR on input */
940 tty
.main
.c_iflag
&= ~ISTRIP
; /* don't strip 8th bit on input */
942 tty
.main
.c_lflag
&= ~ECHO
; /* Disable echo */
943 tty
.main
.c_lflag
&= ~ICANON
; /* Disable erase/kill processing */
945 tty
.main
.c_lflag
&= ~IEXTEN
; /* Disable other editing characters. */
947 tty
.main
.c_lflag
|= ISIG
; /* Enable signals */
948 if (tty_out
->flow_control
)
950 tty
.main
.c_iflag
|= IXON
; /* Enable start/stop output control */
952 tty
.main
.c_iflag
&= ~IXANY
;
956 tty
.main
.c_iflag
&= ~IXON
; /* Disable start/stop output control */
957 tty
.main
.c_oflag
&= ~ONLCR
; /* Disable map of NL to CR-NL
959 tty
.main
.c_oflag
&= ~TAB3
; /* Disable tab expansion */
961 if (tty_out
->meta_key
)
963 tty
.main
.c_cflag
|= CS8
; /* allow 8th bit on input */
964 tty
.main
.c_cflag
&= ~PARENB
;/* Don't check parity */
968 XSETTERMINAL(terminal
, tty_out
->terminal
);
969 if (!NILP (Fcontrolling_tty_p (terminal
)))
971 tty
.main
.c_cc
[VINTR
] = quit_char
; /* C-g (usually) gives SIGINT */
972 /* Set up C-g for both SIGQUIT and SIGINT.
973 We don't know which we will get, but we handle both alike
974 so which one it really gives us does not matter. */
975 tty
.main
.c_cc
[VQUIT
] = quit_char
;
979 /* We normally don't get interrupt or quit signals from tty
980 devices other than our controlling terminal; therefore,
981 we must handle C-g as normal input. Unfortunately, this
982 means that the interrupt and quit feature must be
983 disabled on secondary ttys, or we would not even see the
986 Note that even though emacsclient could have special code
987 to pass SIGINT to Emacs, we should _not_ enable
988 interrupt/quit keys for emacsclient frames. This means
989 that we can't break out of loops in C code from a
990 secondary tty frame, but we can always decide what
991 display the C-g came from, which is more important from a
992 usability point of view. (Consider the case when two
993 people work together using the same Emacs instance.) */
994 tty
.main
.c_cc
[VINTR
] = CDISABLE
;
995 tty
.main
.c_cc
[VQUIT
] = CDISABLE
;
997 tty
.main
.c_cc
[VMIN
] = 1; /* Input should wait for at least 1 char */
998 tty
.main
.c_cc
[VTIME
] = 0; /* no matter how long that takes. */
1000 tty
.main
.c_cc
[VSWTCH
] = CDISABLE
; /* Turn off shell layering use
1005 tty
.main
.c_cc
[VSUSP
] = CDISABLE
; /* Turn off handling of C-z. */
1008 tty
.main
.c_cc
[V_DSUSP
] = CDISABLE
; /* Turn off handling of C-y. */
1009 #endif /* V_DSUSP */
1010 #ifdef VDSUSP /* Some systems have VDSUSP, some have V_DSUSP. */
1011 tty
.main
.c_cc
[VDSUSP
] = CDISABLE
;
1014 tty
.main
.c_cc
[VLNEXT
] = CDISABLE
;
1017 tty
.main
.c_cc
[VREPRINT
] = CDISABLE
;
1018 #endif /* VREPRINT */
1020 tty
.main
.c_cc
[VWERASE
] = CDISABLE
;
1021 #endif /* VWERASE */
1023 tty
.main
.c_cc
[VDISCARD
] = CDISABLE
;
1024 #endif /* VDISCARD */
1026 if (tty_out
->flow_control
)
1029 tty
.main
.c_cc
[VSTART
] = '\021';
1032 tty
.main
.c_cc
[VSTOP
] = '\023';
1038 tty
.main
.c_cc
[VSTART
] = CDISABLE
;
1041 tty
.main
.c_cc
[VSTOP
] = CDISABLE
;
1046 tty
.main
.c_cc
[VSTRT
] = CDISABLE
;
1047 tty
.main
.c_cc
[VSTOP
] = CDISABLE
;
1048 tty
.main
.c_cc
[VSUSP
] = CDISABLE
;
1049 tty
.main
.c_cc
[VDSUSP
] = CDISABLE
;
1050 if (tty_out
->flow_control
)
1053 tty
.main
.c_cc
[VSTART
] = '\021';
1056 tty
.main
.c_cc
[VSTOP
] = '\023';
1059 /* Also, PTY overloads NUL and BREAK.
1060 don't ignore break, but don't signal either, so it looks like NUL.
1061 This really serves a purpose only if running in an XTERM window
1062 or via TELNET or the like, but does no harm elsewhere. */
1063 tty
.main
.c_iflag
&= ~IGNBRK
;
1064 tty
.main
.c_iflag
&= ~BRKINT
;
1066 #endif /* not DOS_NT */
1068 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida, MW Aug 1993 */
1069 if (!tty_out
->term_initted
)
1070 internal_terminal_init ();
1071 dos_ttraw (tty_out
);
1074 emacs_set_tty (fileno (tty_out
->input
), &tty
, 0);
1076 /* This code added to insure that, if flow-control is not to be used,
1077 we have an unlocked terminal at the start. */
1080 if (!tty_out
->flow_control
) ioctl (fileno (tty_out
->input
), TCXONC
, 1);
1083 if (!tty_out
->flow_control
) ioctl (fileno (tty_out
->input
), TIOCSTART
, 0);
1086 #if !defined (DOS_NT)
1088 if (!tty_out
->flow_control
) tcflow (fileno (tty_out
->input
), TCOON
);
1093 if (interrupt_input
)
1095 old_fcntl_owner
[fileno (tty_out
->input
)] =
1096 fcntl (fileno (tty_out
->input
), F_GETOWN
, 0);
1097 fcntl (fileno (tty_out
->input
), F_SETOWN
, getpid ());
1098 init_sigio (fileno (tty_out
->input
));
1100 if (gpm_tty
== tty_out
)
1102 /* Arrange for mouse events to give us SIGIO signals. */
1103 fcntl (gpm_fd
, F_SETOWN
, getpid ());
1104 fcntl (gpm_fd
, F_SETFL
, fcntl (gpm_fd
, F_GETFL
, 0) | O_NONBLOCK
);
1105 init_sigio (gpm_fd
);
1107 #endif /* HAVE_GPM */
1109 #endif /* F_GETOWN */
1112 /* This symbol is defined on recent USG systems.
1113 Someone says without this call USG won't really buffer the file
1114 even with a call to setbuf. */
1115 setvbuf (tty_out
->output
, (char *) _sobuf
, _IOFBF
, sizeof _sobuf
);
1117 setbuf (tty_out
->output
, (char *) _sobuf
);
1120 if (tty_out
->terminal
->set_terminal_modes_hook
)
1121 tty_out
->terminal
->set_terminal_modes_hook (tty_out
->terminal
);
1123 if (!tty_out
->term_initted
)
1125 Lisp_Object tail
, frame
;
1126 FOR_EACH_FRAME (tail
, frame
)
1128 /* XXX This needs to be revised. */
1129 if (FRAME_TERMCAP_P (XFRAME (frame
))
1130 && FRAME_TTY (XFRAME (frame
)) == tty_out
)
1131 init_frame_faces (XFRAME (frame
));
1135 if (tty_out
->term_initted
&& no_redraw_on_reenter
)
1137 /* We used to call "direct_output_forward_char(0)" here,
1138 but it's not clear why, since it may not do anything anyway. */
1142 Lisp_Object tail
, frame
;
1144 FOR_EACH_FRAME (tail
, frame
)
1146 if ((FRAME_TERMCAP_P (XFRAME (frame
))
1147 || FRAME_MSDOS_P (XFRAME (frame
)))
1148 && FRAME_TTY (XFRAME (frame
)) == tty_out
)
1149 FRAME_GARBAGED_P (XFRAME (frame
)) = 1;
1153 tty_out
->term_initted
= 1;
1156 /* Return true if safe to use tabs in output.
1157 At the time this is called, init_sys_modes has not been done yet. */
1160 tabs_safe_p (int fd
)
1162 struct emacs_tty etty
;
1164 emacs_get_tty (fd
, &etty
);
1167 return ((etty
.main
.c_oflag
& TABDLY
) != TAB3
);
1168 #else /* not TABDLY */
1170 #endif /* not TABDLY */
1176 /* Discard echoing. */
1179 suppress_echo_on_tty (int fd
)
1181 struct emacs_tty etty
;
1183 emacs_get_tty (fd
, &etty
);
1185 /* Set raw input mode. */
1188 etty
.main
.c_lflag
&= ~ICANON
; /* Disable buffering */
1189 etty
.main
.c_lflag
&= ~ECHO
; /* Disable echoing */
1190 #endif /* ! WINDOWSNT */
1191 emacs_set_tty (fd
, &etty
, 0);
1194 /* Get terminal size from system.
1195 Store number of lines into *HEIGHTP and width into *WIDTHP.
1196 We store 0 if there's no valid information. */
1199 get_tty_size (int fd
, int *widthp
, int *heightp
)
1201 #if defined TIOCGWINSZ
1204 struct winsize size
;
1206 if (ioctl (fd
, TIOCGWINSZ
, &size
) == -1)
1207 *widthp
= *heightp
= 0;
1210 *widthp
= size
.ws_col
;
1211 *heightp
= size
.ws_row
;
1214 #elif defined TIOCGSIZE
1216 /* SunOS - style. */
1217 struct ttysize size
;
1219 if (ioctl (fd
, TIOCGSIZE
, &size
) == -1)
1220 *widthp
= *heightp
= 0;
1223 *widthp
= size
.ts_cols
;
1224 *heightp
= size
.ts_lines
;
1227 #elif defined WINDOWSNT
1229 CONSOLE_SCREEN_BUFFER_INFO info
;
1230 if (GetConsoleScreenBufferInfo (GetStdHandle (STD_OUTPUT_HANDLE
), &info
))
1232 *widthp
= info
.srWindow
.Right
- info
.srWindow
.Left
+ 1;
1233 *heightp
= info
.srWindow
.Bottom
- info
.srWindow
.Top
+ 1;
1236 *widthp
= *heightp
= 0;
1240 *widthp
= ScreenCols ();
1241 *heightp
= ScreenRows ();
1243 #else /* system doesn't know size */
1251 /* Set the logical window size associated with descriptor FD
1252 to HEIGHT and WIDTH. This is used mainly with ptys.
1253 Return a negative value on failure. */
1256 set_window_size (int fd
, int height
, int width
)
1261 struct winsize size
;
1262 size
.ws_row
= height
;
1263 size
.ws_col
= width
;
1265 return ioctl (fd
, TIOCSWINSZ
, &size
);
1270 /* SunOS - style. */
1271 struct ttysize size
;
1272 size
.ts_lines
= height
;
1273 size
.ts_cols
= width
;
1275 return ioctl (fd
, TIOCGSIZE
, &size
);
1278 #endif /* not SunOS-style */
1279 #endif /* not BSD-style */
1284 /* Prepare all terminal devices for exiting Emacs. */
1287 reset_all_sys_modes (void)
1289 struct tty_display_info
*tty
;
1290 for (tty
= tty_list
; tty
; tty
= tty
->next
)
1291 reset_sys_modes (tty
);
1294 /* Prepare the terminal for closing it; move the cursor to the
1295 bottom of the frame, turn off interrupt-driven I/O, etc. */
1298 reset_sys_modes (struct tty_display_info
*tty_out
)
1305 if (!tty_out
->term_initted
)
1308 if (!tty_out
->output
)
1309 return; /* The tty is suspended. */
1311 /* Go to and clear the last line of the terminal. */
1313 cmgoto (tty_out
, FrameRows (tty_out
) - 1, 0);
1315 /* Code adapted from tty_clear_end_of_line. */
1316 if (tty_out
->TS_clr_line
)
1318 emacs_tputs (tty_out
, tty_out
->TS_clr_line
, 1, cmputc
);
1321 { /* have to do it the hard way */
1323 tty_turn_off_insert (tty_out
);
1325 for (i
= cursorX (tty_out
); i
< FrameCols (tty_out
) - 1; i
++)
1327 fputc (' ', tty_out
->output
);
1331 cmgoto (tty_out
, FrameRows (tty_out
) - 1, 0);
1332 fflush (tty_out
->output
);
1334 if (tty_out
->terminal
->reset_terminal_modes_hook
)
1335 tty_out
->terminal
->reset_terminal_modes_hook (tty_out
->terminal
);
1337 /* Avoid possible loss of output when changing terminal modes. */
1338 while (fdatasync (fileno (tty_out
->output
)) != 0 && errno
== EINTR
)
1343 if (interrupt_input
)
1345 reset_sigio (fileno (tty_out
->input
));
1346 fcntl (fileno (tty_out
->input
), F_SETOWN
,
1347 old_fcntl_owner
[fileno (tty_out
->input
)]);
1349 #endif /* F_SETOWN */
1350 fcntl (fileno (tty_out
->input
), F_SETFL
,
1351 fcntl (fileno (tty_out
->input
), F_GETFL
, 0) & ~O_NONBLOCK
);
1354 if (tty_out
->old_tty
)
1355 while (emacs_set_tty (fileno (tty_out
->input
),
1356 tty_out
->old_tty
, 0) < 0 && errno
== EINTR
)
1359 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */
1363 widen_foreground_group (fileno (tty_out
->input
));
1368 /* Set up the proper status flags for use of a pty. */
1373 /* I'm told that TOICREMOTE does not mean control chars
1374 "can't be sent" but rather that they don't have
1375 input-editing or signaling effects.
1376 That should be good, because we have other ways
1377 to do those things in Emacs.
1378 However, telnet mode seems not to work on 4.2.
1379 So TIOCREMOTE is turned off now. */
1381 /* Under hp-ux, if TIOCREMOTE is turned on, some calls
1382 will hang. In particular, the "timeout" feature (which
1383 causes a read to return if there is no data available)
1384 does this. Also it is known that telnet mode will hang
1385 in such a way that Emacs must be stopped (perhaps this
1386 is the same problem).
1388 If TIOCREMOTE is turned off, then there is a bug in
1389 hp-ux which sometimes loses data. Apparently the
1390 code which blocks the master process when the internal
1391 buffer fills up does not work. Other than this,
1392 though, everything else seems to work fine.
1394 Since the latter lossage is more benign, we may as well
1395 lose that way. -- cph */
1397 #if defined (UNIX98_PTYS)
1400 ioctl (fd
, FIONBIO
, &on
);
1405 #endif /* HAVE_PTYS */
1408 init_system_name (void)
1410 char *hostname_alloc
= NULL
;
1412 #ifndef HAVE_GETHOSTNAME
1415 hostname
= uts
.nodename
;
1416 #else /* HAVE_GETHOSTNAME */
1417 char hostname_buf
[256];
1418 ptrdiff_t hostname_size
= sizeof hostname_buf
;
1419 hostname
= hostname_buf
;
1421 /* Try to get the host name; if the buffer is too short, try
1422 again. Apparently, the only indication gethostname gives of
1423 whether the buffer was large enough is the presence or absence
1424 of a '\0' in the string. Eech. */
1427 gethostname (hostname
, hostname_size
- 1);
1428 hostname
[hostname_size
- 1] = '\0';
1430 /* Was the buffer large enough for the '\0'? */
1431 if (strlen (hostname
) < hostname_size
- 1)
1434 hostname
= hostname_alloc
= xpalloc (hostname_alloc
, &hostname_size
, 1,
1435 min (PTRDIFF_MAX
, SIZE_MAX
), 1);
1437 #endif /* HAVE_GETHOSTNAME */
1439 for (p
= hostname
; *p
; p
++)
1440 if (*p
== ' ' || *p
== '\t')
1442 if (! (STRINGP (Vsystem_name
) && SBYTES (Vsystem_name
) == p
- hostname
1443 && strcmp (SSDATA (Vsystem_name
), hostname
) == 0))
1444 Vsystem_name
= build_string (hostname
);
1445 xfree (hostname_alloc
);
1448 sigset_t empty_mask
;
1450 static struct sigaction process_fatal_action
;
1453 emacs_sigaction_flags (void)
1456 /* SA_RESTART causes interruptible functions with timeouts (e.g.,
1457 'select') to reset their timeout on some platforms (e.g.,
1458 HP-UX 11), which is not what we want. Also, when Emacs is
1459 interactive, we don't want SA_RESTART because we need to poll
1460 for pending input so we need long-running syscalls to be interrupted
1461 after a signal that sets pending_signals.
1463 Non-interactive keyboard input goes through stdio, where we
1464 always want restartable system calls. */
1471 /* Store into *ACTION a signal action suitable for Emacs, with handler
1474 emacs_sigaction_init (struct sigaction
*action
, signal_handler_t handler
)
1476 sigemptyset (&action
->sa_mask
);
1478 /* When handling a signal, block nonfatal system signals that are caught
1479 by Emacs. This makes race conditions less likely. */
1480 sigaddset (&action
->sa_mask
, SIGALRM
);
1482 sigaddset (&action
->sa_mask
, SIGCHLD
);
1485 sigaddset (&action
->sa_mask
, SIGDANGER
);
1487 #ifdef PROFILER_CPU_SUPPORT
1488 sigaddset (&action
->sa_mask
, SIGPROF
);
1491 sigaddset (&action
->sa_mask
, SIGWINCH
);
1493 if (! noninteractive
)
1495 sigaddset (&action
->sa_mask
, SIGINT
);
1496 sigaddset (&action
->sa_mask
, SIGQUIT
);
1498 sigaddset (&action
->sa_mask
, SIGIO
);
1502 action
->sa_handler
= handler
;
1503 action
->sa_flags
= emacs_sigaction_flags ();
1506 #ifdef FORWARD_SIGNAL_TO_MAIN_THREAD
1507 static pthread_t main_thread
;
1510 /* SIG has arrived at the current process. Deliver it to the main
1511 thread, which should handle it with HANDLER.
1513 If we are on the main thread, handle the signal SIG with HANDLER.
1514 Otherwise, redirect the signal to the main thread, blocking it from
1515 this thread. POSIX says any thread can receive a signal that is
1516 associated with a process, process group, or asynchronous event.
1517 On GNU/Linux that is not true, but for other systems (FreeBSD at
1520 deliver_process_signal (int sig
, signal_handler_t handler
)
1522 /* Preserve errno, to avoid race conditions with signal handlers that
1523 might change errno. Races can occur even in single-threaded hosts. */
1524 int old_errno
= errno
;
1526 bool on_main_thread
= true;
1527 #ifdef FORWARD_SIGNAL_TO_MAIN_THREAD
1528 if (! pthread_equal (pthread_self (), main_thread
))
1531 sigemptyset (&blocked
);
1532 sigaddset (&blocked
, sig
);
1533 pthread_sigmask (SIG_BLOCK
, &blocked
, 0);
1534 pthread_kill (main_thread
, sig
);
1535 on_main_thread
= false;
1544 /* Static location to save a fatal backtrace in a thread.
1545 FIXME: If two subsidiary threads fail simultaneously, the resulting
1546 backtrace may be garbage. */
1547 enum { BACKTRACE_LIMIT_MAX
= 500 };
1548 static void *thread_backtrace_buffer
[BACKTRACE_LIMIT_MAX
+ 1];
1549 static int thread_backtrace_npointers
;
1551 /* SIG has arrived at the current thread.
1552 If we are on the main thread, handle the signal SIG with HANDLER.
1553 Otherwise, this is a fatal error in the handling thread. */
1555 deliver_thread_signal (int sig
, signal_handler_t handler
)
1557 int old_errno
= errno
;
1559 #ifdef FORWARD_SIGNAL_TO_MAIN_THREAD
1560 if (! pthread_equal (pthread_self (), main_thread
))
1562 thread_backtrace_npointers
1563 = backtrace (thread_backtrace_buffer
, BACKTRACE_LIMIT_MAX
);
1564 sigaction (sig
, &process_fatal_action
, 0);
1565 pthread_kill (main_thread
, sig
);
1567 /* Avoid further damage while the main thread is exiting. */
1569 sigsuspend (&empty_mask
);
1577 #if !HAVE_DECL_SYS_SIGLIST
1579 # ifdef _sys_siglist
1580 # define sys_siglist _sys_siglist
1581 # elif HAVE_DECL___SYS_SIGLIST
1582 # define sys_siglist __sys_siglist
1584 # define sys_siglist my_sys_siglist
1585 static char const *sys_siglist
[NSIG
];
1590 # define sys_siglist_entries _sys_nsig
1592 # define sys_siglist_entries NSIG
1595 /* Handle bus errors, invalid instruction, etc. */
1597 handle_fatal_signal (int sig
)
1599 terminate_due_to_signal (sig
, 40);
1603 deliver_fatal_signal (int sig
)
1605 deliver_process_signal (sig
, handle_fatal_signal
);
1609 deliver_fatal_thread_signal (int sig
)
1611 deliver_thread_signal (sig
, handle_fatal_signal
);
1614 static _Noreturn
void
1615 handle_arith_signal (int sig
)
1617 pthread_sigmask (SIG_SETMASK
, &empty_mask
, 0);
1618 xsignal0 (Qarith_error
);
1621 #if defined HAVE_STACK_OVERFLOW_HANDLING && !defined WINDOWSNT
1623 /* Alternate stack used by SIGSEGV handler below. */
1625 static unsigned char sigsegv_stack
[SIGSTKSZ
];
1628 /* Return true if SIGINFO indicates a stack overflow. */
1631 stack_overflow (siginfo_t
*siginfo
)
1633 /* In theory, a more-accurate heuristic can be obtained by using
1634 GNU/Linux pthread_getattr_np along with POSIX pthread_attr_getstack
1635 and pthread_attr_getguardsize to find the location and size of the
1636 guard area. In practice, though, these functions are so hard to
1637 use reliably that they're not worth bothering with. E.g., see:
1638 https://sourceware.org/bugzilla/show_bug.cgi?id=16291
1639 Other operating systems also have problems, e.g., Solaris's
1640 stack_violation function is tailor-made for this problem, but it
1641 doesn't work on Solaris 11.2 x86-64 with a 32-bit executable.
1643 GNU libsigsegv is overkill for Emacs; otherwise it might be a
1649 /* The faulting address. */
1650 char *addr
= siginfo
->si_addr
;
1654 /* The known top and bottom of the stack. The actual stack may
1655 extend a bit beyond these boundaries. */
1656 char *bot
= stack_bottom
;
1657 char *top
= near_C_stack_top ();
1659 /* Log base 2 of the stack heuristic ratio. This ratio is the size
1660 of the known stack divided by the size of the guard area past the
1661 end of the stack top. The heuristic is that a bad address is
1662 considered to be a stack overflow if it occurs within
1663 stacksize>>LG_STACK_HEURISTIC bytes above the top of the known
1664 stack. This heuristic is not exactly correct but it's good
1665 enough in practice. */
1666 enum { LG_STACK_HEURISTIC
= 8 };
1669 return 0 <= addr
- top
&& addr
- top
< (top
- bot
) >> LG_STACK_HEURISTIC
;
1671 return 0 <= top
- addr
&& top
- addr
< (bot
- top
) >> LG_STACK_HEURISTIC
;
1675 /* Attempt to recover from SIGSEGV caused by C stack overflow. */
1678 handle_sigsegv (int sig
, siginfo_t
*siginfo
, void *arg
)
1680 /* Hard GC error may lead to stack overflow caused by
1681 too nested calls to mark_object. No way to survive. */
1682 bool fatal
= gc_in_progress
;
1684 #ifdef FORWARD_SIGNAL_TO_MAIN_THREAD
1685 if (!fatal
&& !pthread_equal (pthread_self (), main_thread
))
1689 if (!fatal
&& stack_overflow (siginfo
))
1690 siglongjmp (return_to_command_loop
, 1);
1692 /* Otherwise we can't do anything with this. */
1693 deliver_fatal_thread_signal (sig
);
1696 /* Return true if we have successfully set up SIGSEGV handler on alternate
1697 stack. Otherwise we just treat SIGSEGV among the rest of fatal signals. */
1702 struct sigaction sa
;
1705 ss
.ss_sp
= sigsegv_stack
;
1706 ss
.ss_size
= sizeof (sigsegv_stack
);
1708 if (sigaltstack (&ss
, NULL
) < 0)
1711 sigfillset (&sa
.sa_mask
);
1712 sa
.sa_sigaction
= handle_sigsegv
;
1713 sa
.sa_flags
= SA_SIGINFO
| SA_ONSTACK
| emacs_sigaction_flags ();
1714 return sigaction (SIGSEGV
, &sa
, NULL
) < 0 ? 0 : 1;
1717 #else /* not HAVE_STACK_OVERFLOW_HANDLING or WINDOWSNT */
1725 #endif /* HAVE_STACK_OVERFLOW_HANDLING && !WINDOWSNT */
1728 deliver_arith_signal (int sig
)
1730 deliver_thread_signal (sig
, handle_arith_signal
);
1735 /* Handler for SIGDANGER. */
1737 handle_danger_signal (int sig
)
1739 malloc_warning ("Operating system warns that virtual memory is running low.\n");
1741 /* It might be unsafe to call do_auto_save now. */
1742 force_auto_save_soon ();
1746 deliver_danger_signal (int sig
)
1748 deliver_process_signal (sig
, handle_danger_signal
);
1752 /* Treat SIG as a terminating signal, unless it is already ignored and
1753 we are in --batch mode. Among other things, this makes nohup work. */
1755 maybe_fatal_sig (int sig
)
1757 bool catch_sig
= !noninteractive
;
1760 struct sigaction old_action
;
1761 sigaction (sig
, 0, &old_action
);
1762 catch_sig
= old_action
.sa_handler
!= SIG_IGN
;
1765 sigaction (sig
, &process_fatal_action
, 0);
1769 init_signals (bool dumping
)
1771 struct sigaction thread_fatal_action
;
1772 struct sigaction action
;
1774 sigemptyset (&empty_mask
);
1776 #ifdef FORWARD_SIGNAL_TO_MAIN_THREAD
1777 main_thread
= pthread_self ();
1780 #if !HAVE_DECL_SYS_SIGLIST && !defined _sys_siglist
1783 sys_siglist
[SIGABRT
] = "Aborted";
1785 sys_siglist
[SIGAIO
] = "LAN I/O interrupt";
1787 sys_siglist
[SIGALRM
] = "Alarm clock";
1789 sys_siglist
[SIGBUS
] = "Bus error";
1792 sys_siglist
[SIGCHLD
] = "Child status changed";
1795 sys_siglist
[SIGCONT
] = "Continued";
1798 sys_siglist
[SIGDANGER
] = "Swap space dangerously low";
1801 sys_siglist
[SIGDGNOTIFY
] = "Notification message in queue";
1804 sys_siglist
[SIGEMT
] = "Emulation trap";
1806 sys_siglist
[SIGFPE
] = "Arithmetic exception";
1808 sys_siglist
[SIGFREEZE
] = "SIGFREEZE";
1811 sys_siglist
[SIGGRANT
] = "Monitor mode granted";
1813 sys_siglist
[SIGHUP
] = "Hangup";
1814 sys_siglist
[SIGILL
] = "Illegal instruction";
1815 sys_siglist
[SIGINT
] = "Interrupt";
1817 sys_siglist
[SIGIO
] = "I/O possible";
1820 sys_siglist
[SIGIOINT
] = "I/O intervention required";
1823 sys_siglist
[SIGIOT
] = "IOT trap";
1825 sys_siglist
[SIGKILL
] = "Killed";
1827 sys_siglist
[SIGLOST
] = "Resource lost";
1830 sys_siglist
[SIGLWP
] = "SIGLWP";
1833 sys_siglist
[SIGMSG
] = "Monitor mode data available";
1836 sys_siglist
[SIGWIND
] = "SIGPHONE";
1838 sys_siglist
[SIGPIPE
] = "Broken pipe";
1840 sys_siglist
[SIGPOLL
] = "Pollable event occurred";
1843 sys_siglist
[SIGPROF
] = "Profiling timer expired";
1846 sys_siglist
[SIGPTY
] = "PTY I/O interrupt";
1849 sys_siglist
[SIGPWR
] = "Power-fail restart";
1851 sys_siglist
[SIGQUIT
] = "Quit";
1853 sys_siglist
[SIGRETRACT
] = "Need to relinquish monitor mode";
1856 sys_siglist
[SIGSAK
] = "Secure attention";
1858 sys_siglist
[SIGSEGV
] = "Segmentation violation";
1860 sys_siglist
[SIGSOUND
] = "Sound completed";
1863 sys_siglist
[SIGSTOP
] = "Stopped (signal)";
1866 sys_siglist
[SIGSTP
] = "Stopped (user)";
1869 sys_siglist
[SIGSYS
] = "Bad argument to system call";
1871 sys_siglist
[SIGTERM
] = "Terminated";
1873 sys_siglist
[SIGTHAW
] = "SIGTHAW";
1876 sys_siglist
[SIGTRAP
] = "Trace/breakpoint trap";
1879 sys_siglist
[SIGTSTP
] = "Stopped (user)";
1882 sys_siglist
[SIGTTIN
] = "Stopped (tty input)";
1885 sys_siglist
[SIGTTOU
] = "Stopped (tty output)";
1888 sys_siglist
[SIGURG
] = "Urgent I/O condition";
1891 sys_siglist
[SIGUSR1
] = "User defined signal 1";
1894 sys_siglist
[SIGUSR2
] = "User defined signal 2";
1897 sys_siglist
[SIGVTALRM
] = "Virtual timer expired";
1900 sys_siglist
[SIGWAITING
] = "Process's LWPs are blocked";
1903 sys_siglist
[SIGWINCH
] = "Window size changed";
1906 sys_siglist
[SIGWIND
] = "SIGWIND";
1909 sys_siglist
[SIGXCPU
] = "CPU time limit exceeded";
1912 sys_siglist
[SIGXFSZ
] = "File size limit exceeded";
1915 #endif /* !HAVE_DECL_SYS_SIGLIST && !_sys_siglist */
1917 /* Don't alter signal handlers if dumping. On some machines,
1918 changing signal handlers sets static data that would make signals
1919 fail to work right when the dumped Emacs is run. */
1923 sigfillset (&process_fatal_action
.sa_mask
);
1924 process_fatal_action
.sa_handler
= deliver_fatal_signal
;
1925 process_fatal_action
.sa_flags
= emacs_sigaction_flags ();
1927 sigfillset (&thread_fatal_action
.sa_mask
);
1928 thread_fatal_action
.sa_handler
= deliver_fatal_thread_signal
;
1929 thread_fatal_action
.sa_flags
= process_fatal_action
.sa_flags
;
1931 /* SIGINT may need special treatment on MS-Windows. See
1932 http://lists.gnu.org/archive/html/emacs-devel/2010-09/msg01062.html
1933 Please update the doc of kill-emacs, kill-emacs-hook, and
1934 NEWS if you change this. */
1936 maybe_fatal_sig (SIGHUP
);
1937 maybe_fatal_sig (SIGINT
);
1938 maybe_fatal_sig (SIGTERM
);
1940 /* Emacs checks for write errors, so it can safely ignore SIGPIPE.
1941 However, in batch mode leave SIGPIPE alone, as that causes Emacs
1942 to behave more like typical batch applications do. */
1943 if (! noninteractive
)
1944 signal (SIGPIPE
, SIG_IGN
);
1946 sigaction (SIGQUIT
, &process_fatal_action
, 0);
1947 sigaction (SIGILL
, &thread_fatal_action
, 0);
1948 sigaction (SIGTRAP
, &thread_fatal_action
, 0);
1950 /* Typically SIGFPE is thread-specific and is fatal, like SIGILL.
1951 But on a non-IEEE host SIGFPE can come from a trap in the Lisp
1952 interpreter's floating point operations, so treat SIGFPE as an
1953 arith-error if it arises in the main thread. */
1954 if (IEEE_FLOATING_POINT
)
1955 sigaction (SIGFPE
, &thread_fatal_action
, 0);
1958 emacs_sigaction_init (&action
, deliver_arith_signal
);
1959 sigaction (SIGFPE
, &action
, 0);
1963 add_user_signal (SIGUSR1
, "sigusr1");
1966 add_user_signal (SIGUSR2
, "sigusr2");
1968 sigaction (SIGABRT
, &thread_fatal_action
, 0);
1970 sigaction (SIGPRE
, &thread_fatal_action
, 0);
1973 sigaction (SIGORE
, &thread_fatal_action
, 0);
1976 sigaction (SIGUME
, &thread_fatal_action
, 0);
1979 sigaction (SIGDLK
, &process_fatal_action
, 0);
1982 sigaction (SIGCPULIM
, &process_fatal_action
, 0);
1985 sigaction (SIGIOT
, &thread_fatal_action
, 0);
1988 sigaction (SIGEMT
, &thread_fatal_action
, 0);
1991 sigaction (SIGBUS
, &thread_fatal_action
, 0);
1993 if (!init_sigsegv ())
1994 sigaction (SIGSEGV
, &thread_fatal_action
, 0);
1996 sigaction (SIGSYS
, &thread_fatal_action
, 0);
1998 sigaction (SIGTERM
, &process_fatal_action
, 0);
2000 signal (SIGPROF
, SIG_IGN
);
2003 sigaction (SIGVTALRM
, &process_fatal_action
, 0);
2006 sigaction (SIGXCPU
, &process_fatal_action
, 0);
2009 sigaction (SIGXFSZ
, &process_fatal_action
, 0);
2013 /* This just means available memory is getting low. */
2014 emacs_sigaction_init (&action
, deliver_danger_signal
);
2015 sigaction (SIGDANGER
, &action
, 0);
2018 /* AIX-specific signals. */
2020 sigaction (SIGGRANT
, &process_fatal_action
, 0);
2023 sigaction (SIGMIGRATE
, &process_fatal_action
, 0);
2026 sigaction (SIGMSG
, &process_fatal_action
, 0);
2029 sigaction (SIGRETRACT
, &process_fatal_action
, 0);
2032 sigaction (SIGSAK
, &process_fatal_action
, 0);
2035 sigaction (SIGSOUND
, &process_fatal_action
, 0);
2038 sigaction (SIGTALRM
, &thread_fatal_action
, 0);
2048 /* Figure out how many bits the system's random number generator uses.
2049 `random' and `lrand48' are assumed to return 31 usable bits.
2050 BSD `rand' returns a 31 bit value but the low order bits are unusable;
2051 so we'll shift it and treat it like the 15-bit USG `rand'. */
2055 # define RAND_BITS 31
2056 # else /* !HAVE_RANDOM */
2057 # ifdef HAVE_LRAND48
2058 # define RAND_BITS 31
2059 # define random lrand48
2060 # else /* !HAVE_LRAND48 */
2061 # define RAND_BITS 15
2062 # if RAND_MAX == 32767
2063 # define random rand
2064 # else /* RAND_MAX != 32767 */
2065 # if RAND_MAX == 2147483647
2066 # define random() (rand () >> 16)
2067 # else /* RAND_MAX != 2147483647 */
2069 # define random rand
2071 # define random() (rand () >> 16)
2073 # endif /* RAND_MAX != 2147483647 */
2074 # endif /* RAND_MAX != 32767 */
2075 # endif /* !HAVE_LRAND48 */
2076 # endif /* !HAVE_RANDOM */
2077 #endif /* !RAND_BITS */
2080 typedef unsigned int random_seed
;
2081 static void set_random_seed (random_seed arg
) { srandom (arg
); }
2082 #elif defined HAVE_LRAND48
2083 /* Although srand48 uses a long seed, this is unsigned long to avoid
2084 undefined behavior on signed integer overflow in init_random. */
2085 typedef unsigned long int random_seed
;
2086 static void set_random_seed (random_seed arg
) { srand48 (arg
); }
2088 typedef unsigned int random_seed
;
2089 static void set_random_seed (random_seed arg
) { srand (arg
); }
2093 seed_random (void *seed
, ptrdiff_t seed_size
)
2095 random_seed arg
= 0;
2096 unsigned char *argp
= (unsigned char *) &arg
;
2097 unsigned char *seedp
= seed
;
2098 for (ptrdiff_t i
= 0; i
< seed_size
; i
++)
2099 argp
[i
% sizeof arg
] ^= seedp
[i
];
2100 set_random_seed (arg
);
2107 if (! (EQ (emacs_gnutls_global_init (), Qt
)
2108 && 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 */