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"
104 /* In process.h which conflicts with the local copy. */
106 int _cdecl
_spawnlp (int, const char *, const char *, ...);
107 int _cdecl
_getpid (void);
108 /* The following is needed for O_CLOEXEC, F_SETFD, FD_CLOEXEC, and
109 several prototypes of functions called below. */
110 #include <sys/socket.h>
113 #include "syssignal.h"
116 /* ULLONG_MAX is missing on Red Hat Linux 7.3; see Bug#11781. */
118 #define ULLONG_MAX TYPE_MAXIMUM (unsigned long long int)
121 /* Declare here, including term.h is problematic on some systems. */
122 extern void tputs (const char *, int, int (*)(int));
124 static const int baud_convert
[] =
126 0, 50, 75, 110, 135, 150, 200, 300, 600, 1200,
127 1800, 2400, 4800, 9600, 19200, 38400
130 #if !defined HAVE_GET_CURRENT_DIR_NAME || defined BROKEN_GET_CURRENT_DIR_NAME \
131 || (defined HYBRID_GET_CURRENT_DIR_NAME)
132 /* Return the current working directory. Returns NULL on errors.
133 Any other returned value must be freed with free. This is used
134 only when get_current_dir_name is not defined on the system. */
136 get_current_dir_name (void)
139 char *pwd
= getenv ("PWD");
140 struct stat dotstat
, pwdstat
;
141 /* If PWD is accurate, use it instead of calling getcwd. PWD is
142 sometimes a nicer name, and using it may avoid a fatal error if a
143 parent directory is searchable but not readable. */
145 && (IS_DIRECTORY_SEP (*pwd
) || (*pwd
&& IS_DEVICE_SEP (pwd
[1])))
146 && stat (pwd
, &pwdstat
) == 0
147 && stat (".", &dotstat
) == 0
148 && dotstat
.st_ino
== pwdstat
.st_ino
149 && dotstat
.st_dev
== pwdstat
.st_dev
151 && strlen (pwd
) < MAXPATHLEN
155 buf
= malloc (strlen (pwd
) + 1);
162 size_t buf_size
= 1024;
163 buf
= malloc (buf_size
);
168 if (getcwd (buf
, buf_size
) == buf
)
172 int tmp_errno
= errno
;
178 buf
= realloc (buf
, buf_size
);
188 /* Discard pending input on all input descriptors. */
191 discard_tty_input (void)
194 struct emacs_tty buf
;
199 #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */
200 while (dos_keyread () != -1)
202 #else /* not MSDOS */
204 struct tty_display_info
*tty
;
205 for (tty
= tty_list
; tty
; tty
= tty
->next
)
207 if (tty
->input
) /* Is the device suspended? */
209 emacs_get_tty (fileno (tty
->input
), &buf
);
210 emacs_set_tty (fileno (tty
->input
), &buf
, 0);
214 #endif /* not MSDOS */
215 #endif /* not WINDOWSNT */
221 /* Arrange for character C to be read as the next input from
223 XXX What if we have multiple ttys?
229 if (! (FRAMEP (selected_frame
)
230 && FRAME_LIVE_P (XFRAME (selected_frame
))
231 && FRAME_TERMCAP_P (XFRAME (selected_frame
))))
234 /* Should perhaps error if in batch mode */
236 ioctl (fileno (CURTTY()->input
), TIOCSTI
, &c
);
237 #else /* no TIOCSTI */
238 error ("Cannot stuff terminal input characters in this version of Unix");
239 #endif /* no TIOCSTI */
245 init_baud_rate (int fd
)
255 #else /* not DOS_NT */
260 emacs_ospeed
= cfgetospeed (&sg
);
261 #endif /* not DOS_NT */
264 baud_rate
= (emacs_ospeed
< ARRAYELTS (baud_convert
)
265 ? baud_convert
[emacs_ospeed
] : 9600);
274 /* Wait for the subprocess with process id CHILD to terminate or change status.
275 CHILD must be a child process that has not been reaped.
276 If STATUS is non-null, store the waitpid-style exit status into *STATUS
277 and tell wait_reading_process_output that it needs to look around.
278 Use waitpid-style OPTIONS when waiting.
279 If INTERRUPTIBLE, this function is interruptible by a signal.
281 Return CHILD if successful, 0 if no status is available;
282 the latter is possible only when options & NOHANG. */
284 get_child_status (pid_t child
, int *status
, int options
, bool interruptible
)
288 /* Invoke waitpid only with a known process ID; do not invoke
289 waitpid with a nonpositive argument. Otherwise, Emacs might
290 reap an unwanted process by mistake. For example, invoking
291 waitpid (-1, ...) can mess up glib by reaping glib's subprocesses,
292 so that another thread running glib won't find them. */
295 while ((pid
= waitpid (child
, status
, options
)) < 0)
297 /* Check that CHILD is a child process that has not been reaped,
298 and that STATUS and OPTIONS are valid. Otherwise abort,
299 as continuing after this internal error could cause Emacs to
300 become confused and kill innocent-victim processes. */
304 /* Note: the MS-Windows emulation of waitpid calls QUIT
310 /* If successful and status is requested, tell wait_reading_process_output
311 that it needs to wake up and look around. */
312 if (pid
&& status
&& input_available_clear_time
)
313 *input_available_clear_time
= make_timespec (0, 0);
318 /* Wait for the subprocess with process id CHILD to terminate.
319 CHILD must be a child process that has not been reaped.
320 If STATUS is non-null, store the waitpid-style exit status into *STATUS
321 and tell wait_reading_process_output that it needs to look around.
322 If INTERRUPTIBLE, this function is interruptible by a signal. */
324 wait_for_termination (pid_t child
, int *status
, bool interruptible
)
326 get_child_status (child
, status
, 0, interruptible
);
329 /* Report whether the subprocess with process id CHILD has changed status.
330 Termination counts as a change of status.
331 CHILD must be a child process that has not been reaped.
332 If STATUS is non-null, store the waitpid-style exit status into *STATUS
333 and tell wait_reading_process_output that it needs to look around.
334 Use waitpid-style OPTIONS to check status, but do not wait.
336 Return CHILD if successful, 0 if no status is available because
337 the process's state has not changed. */
339 child_status_changed (pid_t child
, int *status
, int options
)
341 return get_child_status (child
, status
, WNOHANG
| options
, 0);
345 /* Set up the terminal at the other end of a pseudo-terminal that
346 we will be controlling an inferior through.
347 It should not echo or do line-editing, since that is done
348 in Emacs. No padding needed for insertion into an Emacs buffer. */
351 child_setup_tty (int out
)
356 emacs_get_tty (out
, &s
);
357 s
.main
.c_oflag
|= OPOST
; /* Enable output postprocessing */
358 s
.main
.c_oflag
&= ~ONLCR
; /* Disable map of NL to CR-NL on output */
360 /* http://lists.gnu.org/archive/html/emacs-devel/2008-05/msg00406.html
361 Some versions of GNU Hurd do not have FFDLY? */
363 s
.main
.c_oflag
&= ~(NLDLY
|CRDLY
|TABDLY
|BSDLY
|VTDLY
|FFDLY
);
364 /* No output delays */
366 s
.main
.c_oflag
&= ~(NLDLY
|CRDLY
|TABDLY
|BSDLY
|VTDLY
);
367 /* No output delays */
370 s
.main
.c_lflag
&= ~ECHO
; /* Disable echo */
371 s
.main
.c_lflag
|= ISIG
; /* Enable signals */
373 s
.main
.c_iflag
&= ~IUCLC
; /* Disable downcasing on input. */
376 s
.main
.c_iflag
&= ~ISTRIP
; /* don't strip 8th bit on input */
379 s
.main
.c_oflag
&= ~OLCUC
; /* Disable upcasing on output. */
381 s
.main
.c_oflag
&= ~TAB3
; /* Disable tab expansion */
382 s
.main
.c_cflag
= (s
.main
.c_cflag
& ~CSIZE
) | CS8
; /* Don't strip 8th bit */
383 s
.main
.c_cc
[VERASE
] = CDISABLE
; /* disable erase processing */
384 s
.main
.c_cc
[VKILL
] = CDISABLE
; /* disable kill processing */
387 s
.main
.c_cflag
= (s
.main
.c_cflag
& ~CBAUD
) | B9600
; /* baud rate sanity */
390 #ifdef SIGNALS_VIA_CHARACTERS
391 /* the QUIT and INTR character are used in process_send_signal
392 so set them here to something useful. */
393 if (s
.main
.c_cc
[VQUIT
] == CDISABLE
)
394 s
.main
.c_cc
[VQUIT
] = '\\'&037; /* Control-\ */
395 if (s
.main
.c_cc
[VINTR
] == CDISABLE
)
396 s
.main
.c_cc
[VINTR
] = 'C'&037; /* Control-C */
397 #endif /* not SIGNALS_VIA_CHARACTERS */
400 /* Also, PTY overloads NUL and BREAK.
401 don't ignore break, but don't signal either, so it looks like NUL. */
402 s
.main
.c_iflag
&= ~IGNBRK
;
403 s
.main
.c_iflag
&= ~BRKINT
;
404 /* rms: Formerly it set s.main.c_cc[VINTR] to 0377 here
405 unconditionally. Then a SIGNALS_VIA_CHARACTERS conditional
406 would force it to 0377. That looks like duplicated code. */
407 s
.main
.c_cflag
= (s
.main
.c_cflag
& ~CBAUD
) | B9600
; /* baud rate sanity */
410 /* We originally enabled ICANON (and set VEOF to 04), and then had
411 process.c send additional EOF chars to flush the output when faced
412 with long lines, but this leads to weird effects when the
413 subprocess has disabled ICANON and ends up seeing those spurious
414 extra EOFs. So we don't send EOFs any more in
415 process.c:send_process. First we tried to disable ICANON by
416 default, so if a subsprocess sets up ICANON, it's his problem (or
417 the Elisp package that talks to it) to deal with lines that are
418 too long. But this disables some features, such as the ability
419 to send EOF signals. So we re-enabled ICANON but there is no
420 more "send eof to flush" going on (which is wrong and unportable
421 in itself). The correct way to handle too much output is to
422 buffer what could not be written and then write it again when
423 select returns ok for writing. This has it own set of
424 problems. Write is now asynchronous, is that a problem? How much
425 do we buffer, and what do we do when that limit is reached? */
427 s
.main
.c_lflag
|= ICANON
; /* Enable line editing and eof processing */
428 s
.main
.c_cc
[VEOF
] = 'D'&037; /* Control-D */
429 #if 0 /* These settings only apply to non-ICANON mode. */
430 s
.main
.c_cc
[VMIN
] = 1;
431 s
.main
.c_cc
[VTIME
] = 0;
434 emacs_set_tty (out
, &s
, 0);
435 #endif /* not WINDOWSNT */
437 #endif /* not MSDOS */
440 /* Record a signal code and the action for it. */
444 struct sigaction action
;
447 static void save_signal_handlers (struct save_signal
*);
448 static void restore_signal_handlers (struct save_signal
*);
450 /* Suspend the Emacs process; give terminal to its superior. */
458 /* On a system where suspending is not implemented,
459 instead fork a subshell and let it talk directly to the terminal
466 /* Fork a subshell. */
471 #ifdef DOS_NT /* Demacs 1.1.2 91/10/20 Manabu Higashida */
474 char oldwd
[MAXPATHLEN
+1]; /* Fixed length is safe on MSDOS. */
476 char oldwd
[MAX_UTF8_PATH
];
481 struct save_signal saved_handlers
[5];
482 char *str
= SSDATA (encode_current_directory ());
488 char *volatile str_volatile
= str
;
495 error ("Can't spawn subshell");
497 saved_handlers
[0].code
= SIGINT
;
498 saved_handlers
[1].code
= SIGQUIT
;
499 saved_handlers
[2].code
= SIGTERM
;
501 saved_handlers
[3].code
= SIGIO
;
502 saved_handlers
[4].code
= 0;
504 saved_handlers
[3].code
= 0;
508 save_signal_handlers (saved_handlers
);
515 #ifdef DOS_NT /* MW, Aug 1993 */
516 getcwd (oldwd
, sizeof oldwd
);
518 sh
= egetenv ("SUSPEND"); /* KFS, 1994-12-14 */
521 sh
= egetenv ("SHELL");
525 /* Use our buffer's default directory for the subshell. */
526 if (chdir (str
) != 0)
530 _exit (EXIT_CANCELED
);
534 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */
536 char *epwd
= getenv ("PWD");
537 char old_pwd
[MAXPATHLEN
+1+4];
539 /* If PWD is set, pass it with corrected value. */
542 strcpy (old_pwd
, epwd
);
543 setenv ("PWD", str
, 1);
546 chdir (oldwd
); /* FIXME: Do the right thing on chdir failure. */
548 putenv (old_pwd
); /* restore previous value */
550 #else /* not MSDOS */
552 /* Waits for process completion */
553 pid
= _spawnlp (_P_WAIT
, sh
, sh
, NULL
);
554 chdir (oldwd
); /* FIXME: Do the right thing on chdir failure. */
556 write (1, "Can't execute subshell", 22);
557 #else /* not WINDOWSNT */
558 execlp (sh
, sh
, (char *) 0);
560 _exit (errno
== ENOENT
? EXIT_ENOENT
: EXIT_CANNOT_INVOKE
);
561 #endif /* not WINDOWSNT */
562 #endif /* not MSDOS */
565 /* Do this now if we did not do it before. */
567 save_signal_handlers (saved_handlers
);
571 wait_for_termination (pid
, &status
, 0);
573 restore_signal_handlers (saved_handlers
);
577 save_signal_handlers (struct save_signal
*saved_handlers
)
579 while (saved_handlers
->code
)
581 struct sigaction action
;
582 emacs_sigaction_init (&action
, SIG_IGN
);
583 sigaction (saved_handlers
->code
, &action
, &saved_handlers
->action
);
589 restore_signal_handlers (struct save_signal
*saved_handlers
)
591 while (saved_handlers
->code
)
593 sigaction (saved_handlers
->code
, &saved_handlers
->action
, 0);
599 static int old_fcntl_flags
[FD_SETSIZE
];
606 old_fcntl_flags
[fd
] = fcntl (fd
, F_GETFL
, 0) & ~FASYNC
;
607 fcntl (fd
, F_SETFL
, old_fcntl_flags
[fd
] | FASYNC
);
608 interrupts_deferred
= 0;
617 fcntl (fd
, F_SETFL
, old_fcntl_flags
[fd
]);
631 sigemptyset (&unblocked
);
633 sigaddset (&unblocked
, SIGWINCH
);
635 sigaddset (&unblocked
, SIGIO
);
636 pthread_sigmask (SIG_UNBLOCK
, &unblocked
, 0);
638 interrupts_deferred
= 0;
643 unrequest_sigio (void)
651 sigemptyset (&blocked
);
653 sigaddset (&blocked
, SIGWINCH
);
655 sigaddset (&blocked
, SIGIO
);
656 pthread_sigmask (SIG_BLOCK
, &blocked
, 0);
657 interrupts_deferred
= 1;
665 block_child_signal (sigset_t
*oldset
)
668 sigemptyset (&blocked
);
669 sigaddset (&blocked
, SIGCHLD
);
670 sigaddset (&blocked
, SIGINT
);
671 pthread_sigmask (SIG_BLOCK
, &blocked
, oldset
);
674 /* Unblock SIGCHLD. */
677 unblock_child_signal (sigset_t
const *oldset
)
679 pthread_sigmask (SIG_SETMASK
, oldset
, 0);
684 /* Saving and restoring the process group of Emacs's terminal. */
686 /* The process group of which Emacs was a member when it initially
689 If Emacs was in its own process group (i.e. inherited_pgroup ==
690 getpid ()), then we know we're running under a shell with job
691 control (Emacs would never be run as part of a pipeline).
694 If Emacs was not in its own process group, then we know we're
695 running under a shell (or a caller) that doesn't know how to
696 separate itself from Emacs (like sh). Emacs must be in its own
697 process group in order to receive SIGIO correctly. In this
698 situation, we put ourselves in our own pgroup, forcibly set the
699 tty's pgroup to our pgroup, and make sure to restore and reinstate
700 the tty's pgroup just like any other terminal setting. If
701 inherited_group was not the tty's pgroup, then we'll get a
702 SIGTTmumble when we try to change the tty's pgroup, and a CONT if
703 it goes foreground in the future, which is what should happen. */
705 static pid_t inherited_pgroup
;
708 init_foreground_group (void)
710 pid_t pgrp
= getpgrp ();
711 inherited_pgroup
= getpid () == pgrp
? 0 : pgrp
;
714 /* Block and unblock SIGTTOU. */
717 block_tty_out_signal (sigset_t
*oldset
)
721 sigemptyset (&blocked
);
722 sigaddset (&blocked
, SIGTTOU
);
723 pthread_sigmask (SIG_BLOCK
, &blocked
, oldset
);
728 unblock_tty_out_signal (sigset_t
const *oldset
)
731 pthread_sigmask (SIG_SETMASK
, oldset
, 0);
735 /* Safely set a controlling terminal FD's process group to PGID.
736 If we are not in the foreground already, POSIX requires tcsetpgrp
737 to deliver a SIGTTOU signal, which would stop us. This is an
738 annoyance, so temporarily ignore the signal.
740 In practice, platforms lacking SIGTTOU also lack tcsetpgrp, so
741 skip all this unless SIGTTOU is defined. */
743 tcsetpgrp_without_stopping (int fd
, pid_t pgid
)
748 block_tty_out_signal (&oldset
);
749 tcsetpgrp (fd
, pgid
);
750 unblock_tty_out_signal (&oldset
);
755 /* Split off the foreground process group to Emacs alone. When we are
756 in the foreground, but not started in our own process group,
757 redirect the tty device handle FD to point to our own process
758 group. FD must be the file descriptor of the controlling tty. */
760 narrow_foreground_group (int fd
)
762 if (inherited_pgroup
&& setpgid (0, 0) == 0)
763 tcsetpgrp_without_stopping (fd
, getpid ());
766 /* Set the tty to our original foreground group. */
768 widen_foreground_group (int fd
)
770 if (inherited_pgroup
&& setpgid (0, inherited_pgroup
) == 0)
771 tcsetpgrp_without_stopping (fd
, inherited_pgroup
);
774 /* Getting and setting emacs_tty structures. */
776 /* Set *TC to the parameters associated with the terminal FD,
777 or clear it if the parameters are not available.
778 Return 0 on success, -1 on failure. */
780 emacs_get_tty (int fd
, struct emacs_tty
*settings
)
782 /* Retrieve the primary parameters - baud rate, character size, etcetera. */
783 memset (&settings
->main
, 0, sizeof (settings
->main
));
786 HANDLE h
= (HANDLE
)_get_osfhandle (fd
);
789 if (h
&& h
!= INVALID_HANDLE_VALUE
&& GetConsoleMode (h
, &console_mode
))
791 settings
->main
= console_mode
;
794 #endif /* WINDOWSNT */
797 /* We have those nifty POSIX tcmumbleattr functions. */
798 return tcgetattr (fd
, &settings
->main
);
803 /* Set the parameters of the tty on FD according to the contents of
804 *SETTINGS. If FLUSHP, discard input.
805 Return 0 if all went well, and -1 (setting errno) if anything failed. */
808 emacs_set_tty (int fd
, struct emacs_tty
*settings
, bool flushp
)
810 /* Set the primary parameters - baud rate, character size, etcetera. */
813 HANDLE h
= (HANDLE
)_get_osfhandle (fd
);
815 if (h
&& h
!= INVALID_HANDLE_VALUE
)
819 /* Assume the handle is open for input. */
821 FlushConsoleInputBuffer (h
);
822 new_mode
= settings
->main
;
823 SetConsoleMode (h
, new_mode
);
825 #endif /* WINDOWSNT */
828 /* We have those nifty POSIX tcmumbleattr functions.
829 William J. Smith <wjs@wiis.wang.com> writes:
830 "POSIX 1003.1 defines tcsetattr to return success if it was
831 able to perform any of the requested actions, even if some
832 of the requested actions could not be performed.
833 We must read settings back to ensure tty setup properly.
834 AIX requires this to keep tty from hanging occasionally." */
835 /* This make sure that we don't loop indefinitely in here. */
836 for (i
= 0 ; i
< 10 ; i
++)
837 if (tcsetattr (fd
, flushp
? TCSAFLUSH
: TCSADRAIN
, &settings
->main
) < 0)
848 memset (&new, 0, sizeof (new));
849 /* Get the current settings, and see if they're what we asked for. */
850 tcgetattr (fd
, &new);
851 /* We cannot use memcmp on the whole structure here because under
852 * aix386 the termios structure has some reserved field that may
855 if ( new.c_iflag
== settings
->main
.c_iflag
856 && new.c_oflag
== settings
->main
.c_oflag
857 && new.c_cflag
== settings
->main
.c_cflag
858 && new.c_lflag
== settings
->main
.c_lflag
859 && memcmp (new.c_cc
, settings
->main
.c_cc
, NCCS
) == 0)
866 /* We have survived the tempest. */
873 static int old_fcntl_owner
[FD_SETSIZE
];
874 #endif /* F_SETOWN */
876 /* This may also be defined in stdio,
877 but if so, this does no harm,
878 and using the same name avoids wasting the other one's space. */
881 unsigned char _sobuf
[BUFSIZ
+8];
886 /* Initialize the terminal mode on all tty devices that are currently
890 init_all_sys_modes (void)
892 struct tty_display_info
*tty
;
893 for (tty
= tty_list
; tty
; tty
= tty
->next
)
894 init_sys_modes (tty
);
897 /* Initialize the terminal mode on the given tty device. */
900 init_sys_modes (struct tty_display_info
*tty_out
)
902 struct emacs_tty tty
;
903 Lisp_Object terminal
;
905 Vtty_erase_char
= Qnil
;
910 if (!tty_out
->output
)
911 return; /* The tty is suspended. */
913 narrow_foreground_group (fileno (tty_out
->input
));
915 if (! tty_out
->old_tty
)
916 tty_out
->old_tty
= xmalloc (sizeof *tty_out
->old_tty
);
918 emacs_get_tty (fileno (tty_out
->input
), tty_out
->old_tty
);
920 tty
= *tty_out
->old_tty
;
922 #if !defined (DOS_NT)
923 XSETINT (Vtty_erase_char
, tty
.main
.c_cc
[VERASE
]);
925 tty
.main
.c_iflag
|= (IGNBRK
); /* Ignore break condition */
926 tty
.main
.c_iflag
&= ~ICRNL
; /* Disable map of CR to NL on input */
927 #ifdef INLCR /* I'm just being cautious,
928 since I can't check how widespread INLCR is--rms. */
929 tty
.main
.c_iflag
&= ~INLCR
; /* Disable map of NL to CR on input */
932 tty
.main
.c_iflag
&= ~ISTRIP
; /* don't strip 8th bit on input */
934 tty
.main
.c_lflag
&= ~ECHO
; /* Disable echo */
935 tty
.main
.c_lflag
&= ~ICANON
; /* Disable erase/kill processing */
937 tty
.main
.c_lflag
&= ~IEXTEN
; /* Disable other editing characters. */
939 tty
.main
.c_lflag
|= ISIG
; /* Enable signals */
940 if (tty_out
->flow_control
)
942 tty
.main
.c_iflag
|= IXON
; /* Enable start/stop output control */
944 tty
.main
.c_iflag
&= ~IXANY
;
948 tty
.main
.c_iflag
&= ~IXON
; /* Disable start/stop output control */
949 tty
.main
.c_oflag
&= ~ONLCR
; /* Disable map of NL to CR-NL
951 tty
.main
.c_oflag
&= ~TAB3
; /* Disable tab expansion */
953 if (tty_out
->meta_key
)
955 tty
.main
.c_cflag
|= CS8
; /* allow 8th bit on input */
956 tty
.main
.c_cflag
&= ~PARENB
;/* Don't check parity */
960 XSETTERMINAL(terminal
, tty_out
->terminal
);
961 if (!NILP (Fcontrolling_tty_p (terminal
)))
963 tty
.main
.c_cc
[VINTR
] = quit_char
; /* C-g (usually) gives SIGINT */
964 /* Set up C-g for both SIGQUIT and SIGINT.
965 We don't know which we will get, but we handle both alike
966 so which one it really gives us does not matter. */
967 tty
.main
.c_cc
[VQUIT
] = quit_char
;
971 /* We normally don't get interrupt or quit signals from tty
972 devices other than our controlling terminal; therefore,
973 we must handle C-g as normal input. Unfortunately, this
974 means that the interrupt and quit feature must be
975 disabled on secondary ttys, or we would not even see the
978 Note that even though emacsclient could have special code
979 to pass SIGINT to Emacs, we should _not_ enable
980 interrupt/quit keys for emacsclient frames. This means
981 that we can't break out of loops in C code from a
982 secondary tty frame, but we can always decide what
983 display the C-g came from, which is more important from a
984 usability point of view. (Consider the case when two
985 people work together using the same Emacs instance.) */
986 tty
.main
.c_cc
[VINTR
] = CDISABLE
;
987 tty
.main
.c_cc
[VQUIT
] = CDISABLE
;
989 tty
.main
.c_cc
[VMIN
] = 1; /* Input should wait for at least 1 char */
990 tty
.main
.c_cc
[VTIME
] = 0; /* no matter how long that takes. */
992 tty
.main
.c_cc
[VSWTCH
] = CDISABLE
; /* Turn off shell layering use
997 tty
.main
.c_cc
[VSUSP
] = CDISABLE
; /* Turn off handling of C-z. */
1000 tty
.main
.c_cc
[V_DSUSP
] = CDISABLE
; /* Turn off handling of C-y. */
1001 #endif /* V_DSUSP */
1002 #ifdef VDSUSP /* Some systems have VDSUSP, some have V_DSUSP. */
1003 tty
.main
.c_cc
[VDSUSP
] = CDISABLE
;
1006 tty
.main
.c_cc
[VLNEXT
] = CDISABLE
;
1009 tty
.main
.c_cc
[VREPRINT
] = CDISABLE
;
1010 #endif /* VREPRINT */
1012 tty
.main
.c_cc
[VWERASE
] = CDISABLE
;
1013 #endif /* VWERASE */
1015 tty
.main
.c_cc
[VDISCARD
] = CDISABLE
;
1016 #endif /* VDISCARD */
1018 if (tty_out
->flow_control
)
1021 tty
.main
.c_cc
[VSTART
] = '\021';
1024 tty
.main
.c_cc
[VSTOP
] = '\023';
1030 tty
.main
.c_cc
[VSTART
] = CDISABLE
;
1033 tty
.main
.c_cc
[VSTOP
] = CDISABLE
;
1038 tty
.main
.c_cc
[VSTRT
] = CDISABLE
;
1039 tty
.main
.c_cc
[VSTOP
] = CDISABLE
;
1040 tty
.main
.c_cc
[VSUSP
] = CDISABLE
;
1041 tty
.main
.c_cc
[VDSUSP
] = CDISABLE
;
1042 if (tty_out
->flow_control
)
1045 tty
.main
.c_cc
[VSTART
] = '\021';
1048 tty
.main
.c_cc
[VSTOP
] = '\023';
1051 /* Also, PTY overloads NUL and BREAK.
1052 don't ignore break, but don't signal either, so it looks like NUL.
1053 This really serves a purpose only if running in an XTERM window
1054 or via TELNET or the like, but does no harm elsewhere. */
1055 tty
.main
.c_iflag
&= ~IGNBRK
;
1056 tty
.main
.c_iflag
&= ~BRKINT
;
1058 #endif /* not DOS_NT */
1060 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida, MW Aug 1993 */
1061 if (!tty_out
->term_initted
)
1062 internal_terminal_init ();
1063 dos_ttraw (tty_out
);
1066 emacs_set_tty (fileno (tty_out
->input
), &tty
, 0);
1068 /* This code added to insure that, if flow-control is not to be used,
1069 we have an unlocked terminal at the start. */
1072 if (!tty_out
->flow_control
) ioctl (fileno (tty_out
->input
), TCXONC
, 1);
1075 if (!tty_out
->flow_control
) ioctl (fileno (tty_out
->input
), TIOCSTART
, 0);
1078 #if !defined (DOS_NT)
1080 if (!tty_out
->flow_control
) tcflow (fileno (tty_out
->input
), TCOON
);
1085 if (interrupt_input
)
1087 old_fcntl_owner
[fileno (tty_out
->input
)] =
1088 fcntl (fileno (tty_out
->input
), F_GETOWN
, 0);
1089 fcntl (fileno (tty_out
->input
), F_SETOWN
, getpid ());
1090 init_sigio (fileno (tty_out
->input
));
1092 if (gpm_tty
== tty_out
)
1094 /* Arrange for mouse events to give us SIGIO signals. */
1095 fcntl (gpm_fd
, F_SETOWN
, getpid ());
1096 fcntl (gpm_fd
, F_SETFL
, fcntl (gpm_fd
, F_GETFL
, 0) | O_NONBLOCK
);
1097 init_sigio (gpm_fd
);
1099 #endif /* HAVE_GPM */
1101 #endif /* F_GETOWN */
1104 /* This symbol is defined on recent USG systems.
1105 Someone says without this call USG won't really buffer the file
1106 even with a call to setbuf. */
1107 setvbuf (tty_out
->output
, (char *) _sobuf
, _IOFBF
, sizeof _sobuf
);
1109 setbuf (tty_out
->output
, (char *) _sobuf
);
1112 if (tty_out
->terminal
->set_terminal_modes_hook
)
1113 tty_out
->terminal
->set_terminal_modes_hook (tty_out
->terminal
);
1115 if (!tty_out
->term_initted
)
1117 Lisp_Object tail
, frame
;
1118 FOR_EACH_FRAME (tail
, frame
)
1120 /* XXX This needs to be revised. */
1121 if (FRAME_TERMCAP_P (XFRAME (frame
))
1122 && FRAME_TTY (XFRAME (frame
)) == tty_out
)
1123 init_frame_faces (XFRAME (frame
));
1127 if (tty_out
->term_initted
&& no_redraw_on_reenter
)
1129 /* We used to call "direct_output_forward_char(0)" here,
1130 but it's not clear why, since it may not do anything anyway. */
1134 Lisp_Object tail
, frame
;
1136 FOR_EACH_FRAME (tail
, frame
)
1138 if ((FRAME_TERMCAP_P (XFRAME (frame
))
1139 || FRAME_MSDOS_P (XFRAME (frame
)))
1140 && FRAME_TTY (XFRAME (frame
)) == tty_out
)
1141 FRAME_GARBAGED_P (XFRAME (frame
)) = 1;
1145 tty_out
->term_initted
= 1;
1148 /* Return true if safe to use tabs in output.
1149 At the time this is called, init_sys_modes has not been done yet. */
1152 tabs_safe_p (int fd
)
1154 struct emacs_tty etty
;
1156 emacs_get_tty (fd
, &etty
);
1159 return ((etty
.main
.c_oflag
& TABDLY
) != TAB3
);
1160 #else /* not TABDLY */
1162 #endif /* not TABDLY */
1168 /* Discard echoing. */
1171 suppress_echo_on_tty (int fd
)
1173 struct emacs_tty etty
;
1175 emacs_get_tty (fd
, &etty
);
1177 /* Set raw input mode. */
1180 etty
.main
.c_lflag
&= ~ICANON
; /* Disable buffering */
1181 etty
.main
.c_lflag
&= ~ECHO
; /* Disable echoing */
1182 #endif /* ! WINDOWSNT */
1183 emacs_set_tty (fd
, &etty
, 0);
1186 /* Get terminal size from system.
1187 Store number of lines into *HEIGHTP and width into *WIDTHP.
1188 We store 0 if there's no valid information. */
1191 get_tty_size (int fd
, int *widthp
, int *heightp
)
1193 #if defined TIOCGWINSZ
1196 struct winsize size
;
1198 if (ioctl (fd
, TIOCGWINSZ
, &size
) == -1)
1199 *widthp
= *heightp
= 0;
1202 *widthp
= size
.ws_col
;
1203 *heightp
= size
.ws_row
;
1206 #elif defined TIOCGSIZE
1208 /* SunOS - style. */
1209 struct ttysize size
;
1211 if (ioctl (fd
, TIOCGSIZE
, &size
) == -1)
1212 *widthp
= *heightp
= 0;
1215 *widthp
= size
.ts_cols
;
1216 *heightp
= size
.ts_lines
;
1219 #elif defined WINDOWSNT
1221 CONSOLE_SCREEN_BUFFER_INFO info
;
1222 if (GetConsoleScreenBufferInfo (GetStdHandle (STD_OUTPUT_HANDLE
), &info
))
1224 *widthp
= info
.srWindow
.Right
- info
.srWindow
.Left
+ 1;
1225 *heightp
= info
.srWindow
.Bottom
- info
.srWindow
.Top
+ 1;
1228 *widthp
= *heightp
= 0;
1232 *widthp
= ScreenCols ();
1233 *heightp
= ScreenRows ();
1235 #else /* system doesn't know size */
1243 /* Set the logical window size associated with descriptor FD
1244 to HEIGHT and WIDTH. This is used mainly with ptys.
1245 Return a negative value on failure. */
1248 set_window_size (int fd
, int height
, int width
)
1253 struct winsize size
;
1254 size
.ws_row
= height
;
1255 size
.ws_col
= width
;
1257 return ioctl (fd
, TIOCSWINSZ
, &size
);
1262 /* SunOS - style. */
1263 struct ttysize size
;
1264 size
.ts_lines
= height
;
1265 size
.ts_cols
= width
;
1267 return ioctl (fd
, TIOCGSIZE
, &size
);
1270 #endif /* not SunOS-style */
1271 #endif /* not BSD-style */
1276 /* Prepare all terminal devices for exiting Emacs. */
1279 reset_all_sys_modes (void)
1281 struct tty_display_info
*tty
;
1282 for (tty
= tty_list
; tty
; tty
= tty
->next
)
1283 reset_sys_modes (tty
);
1286 /* Prepare the terminal for closing it; move the cursor to the
1287 bottom of the frame, turn off interrupt-driven I/O, etc. */
1290 reset_sys_modes (struct tty_display_info
*tty_out
)
1297 if (!tty_out
->term_initted
)
1300 if (!tty_out
->output
)
1301 return; /* The tty is suspended. */
1303 /* Go to and clear the last line of the terminal. */
1305 cmgoto (tty_out
, FrameRows (tty_out
) - 1, 0);
1307 /* Code adapted from tty_clear_end_of_line. */
1308 if (tty_out
->TS_clr_line
)
1310 emacs_tputs (tty_out
, tty_out
->TS_clr_line
, 1, cmputc
);
1313 { /* have to do it the hard way */
1315 tty_turn_off_insert (tty_out
);
1317 for (i
= cursorX (tty_out
); i
< FrameCols (tty_out
) - 1; i
++)
1319 fputc (' ', tty_out
->output
);
1323 cmgoto (tty_out
, FrameRows (tty_out
) - 1, 0);
1324 fflush (tty_out
->output
);
1326 if (tty_out
->terminal
->reset_terminal_modes_hook
)
1327 tty_out
->terminal
->reset_terminal_modes_hook (tty_out
->terminal
);
1329 /* Avoid possible loss of output when changing terminal modes. */
1330 while (fdatasync (fileno (tty_out
->output
)) != 0 && errno
== EINTR
)
1335 if (interrupt_input
)
1337 reset_sigio (fileno (tty_out
->input
));
1338 fcntl (fileno (tty_out
->input
), F_SETOWN
,
1339 old_fcntl_owner
[fileno (tty_out
->input
)]);
1341 #endif /* F_SETOWN */
1342 fcntl (fileno (tty_out
->input
), F_SETFL
,
1343 fcntl (fileno (tty_out
->input
), F_GETFL
, 0) & ~O_NONBLOCK
);
1346 if (tty_out
->old_tty
)
1347 while (emacs_set_tty (fileno (tty_out
->input
),
1348 tty_out
->old_tty
, 0) < 0 && errno
== EINTR
)
1351 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */
1355 widen_foreground_group (fileno (tty_out
->input
));
1360 /* Set up the proper status flags for use of a pty. */
1365 /* I'm told that TOICREMOTE does not mean control chars
1366 "can't be sent" but rather that they don't have
1367 input-editing or signaling effects.
1368 That should be good, because we have other ways
1369 to do those things in Emacs.
1370 However, telnet mode seems not to work on 4.2.
1371 So TIOCREMOTE is turned off now. */
1373 /* Under hp-ux, if TIOCREMOTE is turned on, some calls
1374 will hang. In particular, the "timeout" feature (which
1375 causes a read to return if there is no data available)
1376 does this. Also it is known that telnet mode will hang
1377 in such a way that Emacs must be stopped (perhaps this
1378 is the same problem).
1380 If TIOCREMOTE is turned off, then there is a bug in
1381 hp-ux which sometimes loses data. Apparently the
1382 code which blocks the master process when the internal
1383 buffer fills up does not work. Other than this,
1384 though, everything else seems to work fine.
1386 Since the latter lossage is more benign, we may as well
1387 lose that way. -- cph */
1389 #if defined (UNIX98_PTYS)
1392 ioctl (fd
, FIONBIO
, &on
);
1397 #endif /* HAVE_PTYS */
1400 init_system_name (void)
1402 char *hostname_alloc
= NULL
;
1404 #ifndef HAVE_GETHOSTNAME
1407 hostname
= uts
.nodename
;
1408 #else /* HAVE_GETHOSTNAME */
1409 char hostname_buf
[256];
1410 ptrdiff_t hostname_size
= sizeof hostname_buf
;
1411 hostname
= hostname_buf
;
1413 /* Try to get the host name; if the buffer is too short, try
1414 again. Apparently, the only indication gethostname gives of
1415 whether the buffer was large enough is the presence or absence
1416 of a '\0' in the string. Eech. */
1419 gethostname (hostname
, hostname_size
- 1);
1420 hostname
[hostname_size
- 1] = '\0';
1422 /* Was the buffer large enough for the '\0'? */
1423 if (strlen (hostname
) < hostname_size
- 1)
1426 hostname
= hostname_alloc
= xpalloc (hostname_alloc
, &hostname_size
, 1,
1427 min (PTRDIFF_MAX
, SIZE_MAX
), 1);
1429 #endif /* HAVE_GETHOSTNAME */
1431 for (p
= hostname
; *p
; p
++)
1432 if (*p
== ' ' || *p
== '\t')
1434 if (! (STRINGP (Vsystem_name
) && SBYTES (Vsystem_name
) == p
- hostname
1435 && strcmp (SSDATA (Vsystem_name
), hostname
) == 0))
1436 Vsystem_name
= build_string (hostname
);
1437 xfree (hostname_alloc
);
1440 sigset_t empty_mask
;
1442 static struct sigaction process_fatal_action
;
1445 emacs_sigaction_flags (void)
1448 /* SA_RESTART causes interruptible functions with timeouts (e.g.,
1449 'select') to reset their timeout on some platforms (e.g.,
1450 HP-UX 11), which is not what we want. Also, when Emacs is
1451 interactive, we don't want SA_RESTART because we need to poll
1452 for pending input so we need long-running syscalls to be interrupted
1453 after a signal that sets pending_signals.
1455 Non-interactive keyboard input goes through stdio, where we
1456 always want restartable system calls. */
1463 /* Store into *ACTION a signal action suitable for Emacs, with handler
1466 emacs_sigaction_init (struct sigaction
*action
, signal_handler_t handler
)
1468 sigemptyset (&action
->sa_mask
);
1470 /* When handling a signal, block nonfatal system signals that are caught
1471 by Emacs. This makes race conditions less likely. */
1472 sigaddset (&action
->sa_mask
, SIGALRM
);
1474 sigaddset (&action
->sa_mask
, SIGCHLD
);
1477 sigaddset (&action
->sa_mask
, SIGDANGER
);
1479 #ifdef PROFILER_CPU_SUPPORT
1480 sigaddset (&action
->sa_mask
, SIGPROF
);
1483 sigaddset (&action
->sa_mask
, SIGWINCH
);
1485 if (! noninteractive
)
1487 sigaddset (&action
->sa_mask
, SIGINT
);
1488 sigaddset (&action
->sa_mask
, SIGQUIT
);
1490 sigaddset (&action
->sa_mask
, SIGIO
);
1494 action
->sa_handler
= handler
;
1495 action
->sa_flags
= emacs_sigaction_flags ();
1498 #ifdef FORWARD_SIGNAL_TO_MAIN_THREAD
1499 static pthread_t main_thread
;
1502 /* SIG has arrived at the current process. Deliver it to the main
1503 thread, which should handle it with HANDLER.
1505 If we are on the main thread, handle the signal SIG with HANDLER.
1506 Otherwise, redirect the signal to the main thread, blocking it from
1507 this thread. POSIX says any thread can receive a signal that is
1508 associated with a process, process group, or asynchronous event.
1509 On GNU/Linux that is not true, but for other systems (FreeBSD at
1512 deliver_process_signal (int sig
, signal_handler_t handler
)
1514 /* Preserve errno, to avoid race conditions with signal handlers that
1515 might change errno. Races can occur even in single-threaded hosts. */
1516 int old_errno
= errno
;
1518 bool on_main_thread
= true;
1519 #ifdef FORWARD_SIGNAL_TO_MAIN_THREAD
1520 if (! pthread_equal (pthread_self (), main_thread
))
1523 sigemptyset (&blocked
);
1524 sigaddset (&blocked
, sig
);
1525 pthread_sigmask (SIG_BLOCK
, &blocked
, 0);
1526 pthread_kill (main_thread
, sig
);
1527 on_main_thread
= false;
1536 /* Static location to save a fatal backtrace in a thread.
1537 FIXME: If two subsidiary threads fail simultaneously, the resulting
1538 backtrace may be garbage. */
1539 enum { BACKTRACE_LIMIT_MAX
= 500 };
1540 static void *thread_backtrace_buffer
[BACKTRACE_LIMIT_MAX
+ 1];
1541 static int thread_backtrace_npointers
;
1543 /* SIG has arrived at the current thread.
1544 If we are on the main thread, handle the signal SIG with HANDLER.
1545 Otherwise, this is a fatal error in the handling thread. */
1547 deliver_thread_signal (int sig
, signal_handler_t handler
)
1549 int old_errno
= errno
;
1551 #ifdef FORWARD_SIGNAL_TO_MAIN_THREAD
1552 if (! pthread_equal (pthread_self (), main_thread
))
1554 thread_backtrace_npointers
1555 = backtrace (thread_backtrace_buffer
, BACKTRACE_LIMIT_MAX
);
1556 sigaction (sig
, &process_fatal_action
, 0);
1557 pthread_kill (main_thread
, sig
);
1559 /* Avoid further damage while the main thread is exiting. */
1561 sigsuspend (&empty_mask
);
1569 #if !HAVE_DECL_SYS_SIGLIST
1571 # ifdef _sys_siglist
1572 # define sys_siglist _sys_siglist
1573 # elif HAVE_DECL___SYS_SIGLIST
1574 # define sys_siglist __sys_siglist
1576 # define sys_siglist my_sys_siglist
1577 static char const *sys_siglist
[NSIG
];
1582 # define sys_siglist_entries _sys_nsig
1584 # define sys_siglist_entries NSIG
1587 /* Handle bus errors, invalid instruction, etc. */
1589 handle_fatal_signal (int sig
)
1591 terminate_due_to_signal (sig
, 40);
1595 deliver_fatal_signal (int sig
)
1597 deliver_process_signal (sig
, handle_fatal_signal
);
1601 deliver_fatal_thread_signal (int sig
)
1603 deliver_thread_signal (sig
, handle_fatal_signal
);
1606 static _Noreturn
void
1607 handle_arith_signal (int sig
)
1609 pthread_sigmask (SIG_SETMASK
, &empty_mask
, 0);
1610 xsignal0 (Qarith_error
);
1613 #if defined HAVE_STACK_OVERFLOW_HANDLING && !defined WINDOWSNT
1615 /* Alternate stack used by SIGSEGV handler below. */
1617 static unsigned char sigsegv_stack
[SIGSTKSZ
];
1620 /* Return true if SIGINFO indicates a stack overflow. */
1623 stack_overflow (siginfo_t
*siginfo
)
1625 /* In theory, a more-accurate heuristic can be obtained by using
1626 GNU/Linux pthread_getattr_np along with POSIX pthread_attr_getstack
1627 and pthread_attr_getguardsize to find the location and size of the
1628 guard area. In practice, though, these functions are so hard to
1629 use reliably that they're not worth bothering with. E.g., see:
1630 https://sourceware.org/bugzilla/show_bug.cgi?id=16291
1631 Other operating systems also have problems, e.g., Solaris's
1632 stack_violation function is tailor-made for this problem, but it
1633 doesn't work on Solaris 11.2 x86-64 with a 32-bit executable.
1635 GNU libsigsegv is overkill for Emacs; otherwise it might be a
1641 /* The faulting address. */
1642 char *addr
= siginfo
->si_addr
;
1646 /* The known top and bottom of the stack. The actual stack may
1647 extend a bit beyond these boundaries. */
1648 char *bot
= stack_bottom
;
1649 char *top
= near_C_stack_top ();
1651 /* Log base 2 of the stack heuristic ratio. This ratio is the size
1652 of the known stack divided by the size of the guard area past the
1653 end of the stack top. The heuristic is that a bad address is
1654 considered to be a stack overflow if it occurs within
1655 stacksize>>LG_STACK_HEURISTIC bytes above the top of the known
1656 stack. This heuristic is not exactly correct but it's good
1657 enough in practice. */
1658 enum { LG_STACK_HEURISTIC
= 8 };
1661 return 0 <= addr
- top
&& addr
- top
< (top
- bot
) >> LG_STACK_HEURISTIC
;
1663 return 0 <= top
- addr
&& top
- addr
< (bot
- top
) >> LG_STACK_HEURISTIC
;
1667 /* Attempt to recover from SIGSEGV caused by C stack overflow. */
1670 handle_sigsegv (int sig
, siginfo_t
*siginfo
, void *arg
)
1672 /* Hard GC error may lead to stack overflow caused by
1673 too nested calls to mark_object. No way to survive. */
1674 bool fatal
= gc_in_progress
;
1676 #ifdef FORWARD_SIGNAL_TO_MAIN_THREAD
1677 if (!fatal
&& !pthread_equal (pthread_self (), main_thread
))
1681 if (!fatal
&& stack_overflow (siginfo
))
1682 siglongjmp (return_to_command_loop
, 1);
1684 /* Otherwise we can't do anything with this. */
1685 deliver_fatal_thread_signal (sig
);
1688 /* Return true if we have successfully set up SIGSEGV handler on alternate
1689 stack. Otherwise we just treat SIGSEGV among the rest of fatal signals. */
1694 struct sigaction sa
;
1697 ss
.ss_sp
= sigsegv_stack
;
1698 ss
.ss_size
= sizeof (sigsegv_stack
);
1700 if (sigaltstack (&ss
, NULL
) < 0)
1703 sigfillset (&sa
.sa_mask
);
1704 sa
.sa_sigaction
= handle_sigsegv
;
1705 sa
.sa_flags
= SA_SIGINFO
| SA_ONSTACK
| emacs_sigaction_flags ();
1706 return sigaction (SIGSEGV
, &sa
, NULL
) < 0 ? 0 : 1;
1709 #else /* not HAVE_STACK_OVERFLOW_HANDLING or WINDOWSNT */
1717 #endif /* HAVE_STACK_OVERFLOW_HANDLING && !WINDOWSNT */
1720 deliver_arith_signal (int sig
)
1722 deliver_thread_signal (sig
, handle_arith_signal
);
1727 /* Handler for SIGDANGER. */
1729 handle_danger_signal (int sig
)
1731 malloc_warning ("Operating system warns that virtual memory is running low.\n");
1733 /* It might be unsafe to call do_auto_save now. */
1734 force_auto_save_soon ();
1738 deliver_danger_signal (int sig
)
1740 deliver_process_signal (sig
, handle_danger_signal
);
1744 /* Treat SIG as a terminating signal, unless it is already ignored and
1745 we are in --batch mode. Among other things, this makes nohup work. */
1747 maybe_fatal_sig (int sig
)
1749 bool catch_sig
= !noninteractive
;
1752 struct sigaction old_action
;
1753 sigaction (sig
, 0, &old_action
);
1754 catch_sig
= old_action
.sa_handler
!= SIG_IGN
;
1757 sigaction (sig
, &process_fatal_action
, 0);
1761 init_signals (bool dumping
)
1763 struct sigaction thread_fatal_action
;
1764 struct sigaction action
;
1766 sigemptyset (&empty_mask
);
1768 #ifdef FORWARD_SIGNAL_TO_MAIN_THREAD
1769 main_thread
= pthread_self ();
1772 #if !HAVE_DECL_SYS_SIGLIST && !defined _sys_siglist
1775 sys_siglist
[SIGABRT
] = "Aborted";
1777 sys_siglist
[SIGAIO
] = "LAN I/O interrupt";
1779 sys_siglist
[SIGALRM
] = "Alarm clock";
1781 sys_siglist
[SIGBUS
] = "Bus error";
1784 sys_siglist
[SIGCHLD
] = "Child status changed";
1787 sys_siglist
[SIGCONT
] = "Continued";
1790 sys_siglist
[SIGDANGER
] = "Swap space dangerously low";
1793 sys_siglist
[SIGDGNOTIFY
] = "Notification message in queue";
1796 sys_siglist
[SIGEMT
] = "Emulation trap";
1798 sys_siglist
[SIGFPE
] = "Arithmetic exception";
1800 sys_siglist
[SIGFREEZE
] = "SIGFREEZE";
1803 sys_siglist
[SIGGRANT
] = "Monitor mode granted";
1805 sys_siglist
[SIGHUP
] = "Hangup";
1806 sys_siglist
[SIGILL
] = "Illegal instruction";
1807 sys_siglist
[SIGINT
] = "Interrupt";
1809 sys_siglist
[SIGIO
] = "I/O possible";
1812 sys_siglist
[SIGIOINT
] = "I/O intervention required";
1815 sys_siglist
[SIGIOT
] = "IOT trap";
1817 sys_siglist
[SIGKILL
] = "Killed";
1819 sys_siglist
[SIGLOST
] = "Resource lost";
1822 sys_siglist
[SIGLWP
] = "SIGLWP";
1825 sys_siglist
[SIGMSG
] = "Monitor mode data available";
1828 sys_siglist
[SIGWIND
] = "SIGPHONE";
1830 sys_siglist
[SIGPIPE
] = "Broken pipe";
1832 sys_siglist
[SIGPOLL
] = "Pollable event occurred";
1835 sys_siglist
[SIGPROF
] = "Profiling timer expired";
1838 sys_siglist
[SIGPTY
] = "PTY I/O interrupt";
1841 sys_siglist
[SIGPWR
] = "Power-fail restart";
1843 sys_siglist
[SIGQUIT
] = "Quit";
1845 sys_siglist
[SIGRETRACT
] = "Need to relinquish monitor mode";
1848 sys_siglist
[SIGSAK
] = "Secure attention";
1850 sys_siglist
[SIGSEGV
] = "Segmentation violation";
1852 sys_siglist
[SIGSOUND
] = "Sound completed";
1855 sys_siglist
[SIGSTOP
] = "Stopped (signal)";
1858 sys_siglist
[SIGSTP
] = "Stopped (user)";
1861 sys_siglist
[SIGSYS
] = "Bad argument to system call";
1863 sys_siglist
[SIGTERM
] = "Terminated";
1865 sys_siglist
[SIGTHAW
] = "SIGTHAW";
1868 sys_siglist
[SIGTRAP
] = "Trace/breakpoint trap";
1871 sys_siglist
[SIGTSTP
] = "Stopped (user)";
1874 sys_siglist
[SIGTTIN
] = "Stopped (tty input)";
1877 sys_siglist
[SIGTTOU
] = "Stopped (tty output)";
1880 sys_siglist
[SIGURG
] = "Urgent I/O condition";
1883 sys_siglist
[SIGUSR1
] = "User defined signal 1";
1886 sys_siglist
[SIGUSR2
] = "User defined signal 2";
1889 sys_siglist
[SIGVTALRM
] = "Virtual timer expired";
1892 sys_siglist
[SIGWAITING
] = "Process's LWPs are blocked";
1895 sys_siglist
[SIGWINCH
] = "Window size changed";
1898 sys_siglist
[SIGWIND
] = "SIGWIND";
1901 sys_siglist
[SIGXCPU
] = "CPU time limit exceeded";
1904 sys_siglist
[SIGXFSZ
] = "File size limit exceeded";
1907 #endif /* !HAVE_DECL_SYS_SIGLIST && !_sys_siglist */
1909 /* Don't alter signal handlers if dumping. On some machines,
1910 changing signal handlers sets static data that would make signals
1911 fail to work right when the dumped Emacs is run. */
1915 sigfillset (&process_fatal_action
.sa_mask
);
1916 process_fatal_action
.sa_handler
= deliver_fatal_signal
;
1917 process_fatal_action
.sa_flags
= emacs_sigaction_flags ();
1919 sigfillset (&thread_fatal_action
.sa_mask
);
1920 thread_fatal_action
.sa_handler
= deliver_fatal_thread_signal
;
1921 thread_fatal_action
.sa_flags
= process_fatal_action
.sa_flags
;
1923 /* SIGINT may need special treatment on MS-Windows. See
1924 http://lists.gnu.org/archive/html/emacs-devel/2010-09/msg01062.html
1925 Please update the doc of kill-emacs, kill-emacs-hook, and
1926 NEWS if you change this. */
1928 maybe_fatal_sig (SIGHUP
);
1929 maybe_fatal_sig (SIGINT
);
1930 maybe_fatal_sig (SIGTERM
);
1932 /* Emacs checks for write errors, so it can safely ignore SIGPIPE.
1933 However, in batch mode leave SIGPIPE alone, as that causes Emacs
1934 to behave more like typical batch applications do. */
1935 if (! noninteractive
)
1936 signal (SIGPIPE
, SIG_IGN
);
1938 sigaction (SIGQUIT
, &process_fatal_action
, 0);
1939 sigaction (SIGILL
, &thread_fatal_action
, 0);
1940 sigaction (SIGTRAP
, &thread_fatal_action
, 0);
1942 /* Typically SIGFPE is thread-specific and is fatal, like SIGILL.
1943 But on a non-IEEE host SIGFPE can come from a trap in the Lisp
1944 interpreter's floating point operations, so treat SIGFPE as an
1945 arith-error if it arises in the main thread. */
1946 if (IEEE_FLOATING_POINT
)
1947 sigaction (SIGFPE
, &thread_fatal_action
, 0);
1950 emacs_sigaction_init (&action
, deliver_arith_signal
);
1951 sigaction (SIGFPE
, &action
, 0);
1955 add_user_signal (SIGUSR1
, "sigusr1");
1958 add_user_signal (SIGUSR2
, "sigusr2");
1960 sigaction (SIGABRT
, &thread_fatal_action
, 0);
1962 sigaction (SIGPRE
, &thread_fatal_action
, 0);
1965 sigaction (SIGORE
, &thread_fatal_action
, 0);
1968 sigaction (SIGUME
, &thread_fatal_action
, 0);
1971 sigaction (SIGDLK
, &process_fatal_action
, 0);
1974 sigaction (SIGCPULIM
, &process_fatal_action
, 0);
1977 sigaction (SIGIOT
, &thread_fatal_action
, 0);
1980 sigaction (SIGEMT
, &thread_fatal_action
, 0);
1983 sigaction (SIGBUS
, &thread_fatal_action
, 0);
1985 if (!init_sigsegv ())
1986 sigaction (SIGSEGV
, &thread_fatal_action
, 0);
1988 sigaction (SIGSYS
, &thread_fatal_action
, 0);
1990 sigaction (SIGTERM
, &process_fatal_action
, 0);
1992 signal (SIGPROF
, SIG_IGN
);
1995 sigaction (SIGVTALRM
, &process_fatal_action
, 0);
1998 sigaction (SIGXCPU
, &process_fatal_action
, 0);
2001 sigaction (SIGXFSZ
, &process_fatal_action
, 0);
2005 /* This just means available memory is getting low. */
2006 emacs_sigaction_init (&action
, deliver_danger_signal
);
2007 sigaction (SIGDANGER
, &action
, 0);
2010 /* AIX-specific signals. */
2012 sigaction (SIGGRANT
, &process_fatal_action
, 0);
2015 sigaction (SIGMIGRATE
, &process_fatal_action
, 0);
2018 sigaction (SIGMSG
, &process_fatal_action
, 0);
2021 sigaction (SIGRETRACT
, &process_fatal_action
, 0);
2024 sigaction (SIGSAK
, &process_fatal_action
, 0);
2027 sigaction (SIGSOUND
, &process_fatal_action
, 0);
2030 sigaction (SIGTALRM
, &thread_fatal_action
, 0);
2040 /* Figure out how many bits the system's random number generator uses.
2041 `random' and `lrand48' are assumed to return 31 usable bits.
2042 BSD `rand' returns a 31 bit value but the low order bits are unusable;
2043 so we'll shift it and treat it like the 15-bit USG `rand'. */
2047 # define RAND_BITS 31
2048 # else /* !HAVE_RANDOM */
2049 # ifdef HAVE_LRAND48
2050 # define RAND_BITS 31
2051 # define random lrand48
2052 # else /* !HAVE_LRAND48 */
2053 # define RAND_BITS 15
2054 # if RAND_MAX == 32767
2055 # define random rand
2056 # else /* RAND_MAX != 32767 */
2057 # if RAND_MAX == 2147483647
2058 # define random() (rand () >> 16)
2059 # else /* RAND_MAX != 2147483647 */
2061 # define random rand
2063 # define random() (rand () >> 16)
2065 # endif /* RAND_MAX != 2147483647 */
2066 # endif /* RAND_MAX != 32767 */
2067 # endif /* !HAVE_LRAND48 */
2068 # endif /* !HAVE_RANDOM */
2069 #endif /* !RAND_BITS */
2072 typedef unsigned int random_seed
;
2073 static void set_random_seed (random_seed arg
) { srandom (arg
); }
2074 #elif defined HAVE_LRAND48
2075 /* Although srand48 uses a long seed, this is unsigned long to avoid
2076 undefined behavior on signed integer overflow in init_random. */
2077 typedef unsigned long int random_seed
;
2078 static void set_random_seed (random_seed arg
) { srand48 (arg
); }
2080 typedef unsigned int random_seed
;
2081 static void set_random_seed (random_seed arg
) { srand (arg
); }
2085 seed_random (void *seed
, ptrdiff_t seed_size
)
2087 random_seed arg
= 0;
2088 unsigned char *argp
= (unsigned char *) &arg
;
2089 unsigned char *seedp
= seed
;
2090 for (ptrdiff_t i
= 0; i
< seed_size
; i
++)
2091 argp
[i
% sizeof arg
] ^= seedp
[i
];
2092 set_random_seed (arg
);
2099 bool success
= false;
2101 int fd
= emacs_open ("/dev/urandom", O_RDONLY
| O_BINARY
, 0);
2104 success
= emacs_read (fd
, &v
, sizeof v
) == sizeof v
;
2108 success
= w32_init_random (&v
, sizeof v
) == 0;
2112 /* Fall back to current time value + PID. */
2113 struct timespec t
= current_timespec ();
2114 v
= getpid () ^ t
.tv_sec
^ t
.tv_nsec
;
2116 set_random_seed (v
);
2120 * Return a nonnegative random integer out of whatever we've got.
2121 * It contains enough bits to make a random (signed) Emacs fixnum.
2122 * This suffices even for a 64-bit architecture with a 15-bit rand.
2129 for (i
= 0; i
< (FIXNUM_BITS
+ RAND_BITS
- 1) / RAND_BITS
; i
++)
2130 val
= (random () ^ (val
<< RAND_BITS
)
2131 ^ (val
>> (BITS_PER_EMACS_INT
- RAND_BITS
)));
2132 val
^= val
>> (BITS_PER_EMACS_INT
- FIXNUM_BITS
);
2133 return val
& INTMASK
;
2136 #ifndef HAVE_SNPRINTF
2137 /* Approximate snprintf as best we can on ancient hosts that lack it. */
2139 snprintf (char *buf
, size_t bufsize
, char const *format
, ...)
2141 ptrdiff_t size
= min (bufsize
, PTRDIFF_MAX
);
2142 ptrdiff_t nbytes
= size
- 1;
2147 va_start (ap
, format
);
2148 nbytes
= doprnt (buf
, size
, format
, 0, ap
);
2152 if (nbytes
== size
- 1)
2154 /* Calculate the length of the string that would have been created
2155 had the buffer been large enough. */
2156 char stackbuf
[4000];
2158 ptrdiff_t bsize
= sizeof stackbuf
;
2159 va_start (ap
, format
);
2160 nbytes
= evxprintf (&b
, &bsize
, stackbuf
, -1, format
, ap
);
2166 if (nbytes
> INT_MAX
)
2179 /* If a backtrace is available, output the top lines of it to stderr.
2180 Do not output more than BACKTRACE_LIMIT or BACKTRACE_LIMIT_MAX lines.
2181 This function may be called from a signal handler, so it should
2182 not invoke async-unsafe functions like malloc.
2184 If BACKTRACE_LIMIT is -1, initialize tables that 'backtrace' uses
2185 but do not output anything. This avoids some problems that can
2186 otherwise occur if the malloc arena is corrupted before 'backtrace'
2187 is called, since 'backtrace' may call malloc if the tables are not
2190 If the static variable THREAD_BACKTRACE_NPOINTERS is nonzero, a
2191 fatal error has occurred in some other thread; generate a thread
2192 backtrace instead, ignoring BACKTRACE_LIMIT. */
2194 emacs_backtrace (int backtrace_limit
)
2196 void *main_backtrace_buffer
[BACKTRACE_LIMIT_MAX
+ 1];
2197 int bounded_limit
= min (backtrace_limit
, BACKTRACE_LIMIT_MAX
);
2201 if (thread_backtrace_npointers
)
2203 buffer
= thread_backtrace_buffer
;
2204 npointers
= thread_backtrace_npointers
;
2208 buffer
= main_backtrace_buffer
;
2210 /* Work around 'backtrace' bug; see Bug#19959 and glibc bug#18084. */
2211 if (bounded_limit
< 0)
2213 backtrace (buffer
, 1);
2217 npointers
= backtrace (buffer
, bounded_limit
+ 1);
2222 emacs_write (STDERR_FILENO
, "\nBacktrace:\n", 12);
2223 backtrace_symbols_fd (buffer
, npointers
, STDERR_FILENO
);
2224 if (npointers
> bounded_limit
)
2225 emacs_write (STDERR_FILENO
, "...\n", 4);
2233 terminate_due_to_signal (SIGABRT
, 40);
2237 /* Open FILE for Emacs use, using open flags OFLAG and mode MODE.
2238 Use binary I/O on systems that care about text vs binary I/O.
2239 Arrange for subprograms to not inherit the file descriptor.
2240 Prefer a method that is multithread-safe, if available.
2241 Do not fail merely because the open was interrupted by a signal.
2242 Allow the user to quit. */
2245 emacs_open (const char *file
, int oflags
, int mode
)
2248 if (! (oflags
& O_TEXT
))
2250 oflags
|= O_CLOEXEC
;
2251 while ((fd
= open (file
, oflags
, mode
)) < 0 && errno
== EINTR
)
2253 if (! O_CLOEXEC
&& fd
>= 0)
2254 fcntl (fd
, F_SETFD
, FD_CLOEXEC
);
2258 /* Open FILE as a stream for Emacs use, with mode MODE.
2259 Act like emacs_open with respect to threads, signals, and quits. */
2262 emacs_fopen (char const *file
, char const *mode
)
2264 int fd
, omode
, oflags
;
2266 char const *m
= mode
;
2270 case 'r': omode
= O_RDONLY
; oflags
= 0; break;
2271 case 'w': omode
= O_WRONLY
; oflags
= O_CREAT
| O_TRUNC
; break;
2272 case 'a': omode
= O_WRONLY
; oflags
= O_CREAT
| O_APPEND
; break;
2273 default: emacs_abort ();
2279 case '+': omode
= O_RDWR
; break;
2280 case 'b': bflag
= O_BINARY
; break;
2281 case 't': bflag
= O_TEXT
; break;
2282 default: /* Ignore. */ break;
2285 fd
= emacs_open (file
, omode
| oflags
| bflag
, 0666);
2286 return fd
< 0 ? 0 : fdopen (fd
, mode
);
2289 /* Create a pipe for Emacs use. */
2292 emacs_pipe (int fd
[2])
2297 int result
= pipe2 (fd
, O_BINARY
| O_CLOEXEC
);
2298 if (! O_CLOEXEC
&& result
== 0)
2300 fcntl (fd
[0], F_SETFD
, FD_CLOEXEC
);
2301 fcntl (fd
[1], F_SETFD
, FD_CLOEXEC
);
2307 /* Approximate posix_close and POSIX_CLOSE_RESTART well enough for Emacs.
2308 For the background behind this mess, please see Austin Group defect 529
2309 <http://austingroupbugs.net/view.php?id=529>. */
2311 #ifndef POSIX_CLOSE_RESTART
2312 # define POSIX_CLOSE_RESTART 1
2314 posix_close (int fd
, int flag
)
2316 /* Only the POSIX_CLOSE_RESTART case is emulated. */
2317 eassert (flag
== POSIX_CLOSE_RESTART
);
2319 /* Things are tricky if close (fd) returns -1 with errno == EINTR
2320 on a system that does not define POSIX_CLOSE_RESTART.
2322 In this case, in some systems (e.g., GNU/Linux, AIX) FD is
2323 closed, and retrying the close could inadvertently close a file
2324 descriptor allocated by some other thread. In other systems
2325 (e.g., HP/UX) FD is not closed. And in still other systems
2326 (e.g., OS X, Solaris), maybe FD is closed, maybe not, and in a
2327 multithreaded program there can be no way to tell.
2329 So, in this case, pretend that the close succeeded. This works
2330 well on systems like GNU/Linux that close FD. Although it may
2331 leak a file descriptor on other systems, the leak is unlikely and
2332 it's better to leak than to close a random victim. */
2333 return close (fd
) == 0 || errno
== EINTR
? 0 : -1;
2337 /* Close FD, retrying if interrupted. If successful, return 0;
2338 otherwise, return -1 and set errno to a non-EINTR value. Consider
2339 an EINPROGRESS error to be successful, as that's merely a signal
2340 arriving. FD is always closed when this function returns, even
2343 Do not call this function if FD is nonnegative and might already be closed,
2344 as that might close an innocent victim opened by some other thread. */
2347 emacs_close (int fd
)
2351 int r
= posix_close (fd
, POSIX_CLOSE_RESTART
);
2354 if (!POSIX_CLOSE_RESTART
|| errno
!= EINTR
)
2356 eassert (errno
!= EBADF
|| fd
< 0);
2357 return errno
== EINPROGRESS
? 0 : r
;
2362 /* Maximum number of bytes to read or write in a single system call.
2363 This works around a serious bug in Linux kernels before 2.6.16; see
2364 <https://bugzilla.redhat.com/show_bug.cgi?format=multiple&id=612839>.
2365 It's likely to work around similar bugs in other operating systems, so do it
2366 on all platforms. Round INT_MAX down to a page size, with the conservative
2367 assumption that page sizes are at most 2**18 bytes (any kernel with a
2368 page size larger than that shouldn't have the bug). */
2369 #ifndef MAX_RW_COUNT
2370 #define MAX_RW_COUNT (INT_MAX >> 18 << 18)
2373 /* Read from FILEDESC to a buffer BUF with size NBYTE, retrying if interrupted.
2374 Return the number of bytes read, which might be less than NBYTE.
2375 On error, set errno and return -1. */
2377 emacs_read (int fildes
, void *buf
, ptrdiff_t nbyte
)
2381 /* There is no need to check against MAX_RW_COUNT, since no caller ever
2382 passes a size that large to emacs_read. */
2384 while ((rtnval
= read (fildes
, buf
, nbyte
)) == -1
2385 && (errno
== EINTR
))
2390 /* Write to FILEDES from a buffer BUF with size NBYTE, retrying if interrupted
2391 or if a partial write occurs. If interrupted, process pending
2392 signals if PROCESS SIGNALS. Return the number of bytes written, setting
2393 errno if this is less than NBYTE. */
2395 emacs_full_write (int fildes
, char const *buf
, ptrdiff_t nbyte
,
2396 bool process_signals
)
2398 ptrdiff_t bytes_written
= 0;
2402 ssize_t n
= write (fildes
, buf
, min (nbyte
, MAX_RW_COUNT
));
2408 /* I originally used `QUIT' but that might cause files to
2409 be truncated if you hit C-g in the middle of it. --Stef */
2410 if (process_signals
&& pending_signals
)
2411 process_pending_signals ();
2423 return bytes_written
;
2426 /* Write to FILEDES from a buffer BUF with size NBYTE, retrying if
2427 interrupted or if a partial write occurs. Return the number of
2428 bytes written, setting errno if this is less than NBYTE. */
2430 emacs_write (int fildes
, void const *buf
, ptrdiff_t nbyte
)
2432 return emacs_full_write (fildes
, buf
, nbyte
, 0);
2435 /* Like emacs_write, but also process pending signals if interrupted. */
2437 emacs_write_sig (int fildes
, void const *buf
, ptrdiff_t nbyte
)
2439 return emacs_full_write (fildes
, buf
, nbyte
, 1);
2442 /* Write a diagnostic to standard error that contains MESSAGE and a
2443 string derived from errno. Preserve errno. Do not buffer stderr.
2444 Do not process pending signals if interrupted. */
2446 emacs_perror (char const *message
)
2449 char const *error_string
= strerror (err
);
2450 char const *command
= (initial_argv
&& initial_argv
[0]
2451 ? initial_argv
[0] : "emacs");
2452 /* Write it out all at once, if it's short; this is less likely to
2453 be interleaved with other output. */
2455 int nbytes
= snprintf (buf
, sizeof buf
, "%s: %s: %s\n",
2456 command
, message
, error_string
);
2457 if (0 <= nbytes
&& nbytes
< BUFSIZ
)
2458 emacs_write (STDERR_FILENO
, buf
, nbytes
);
2461 emacs_write (STDERR_FILENO
, command
, strlen (command
));
2462 emacs_write (STDERR_FILENO
, ": ", 2);
2463 emacs_write (STDERR_FILENO
, message
, strlen (message
));
2464 emacs_write (STDERR_FILENO
, ": ", 2);
2465 emacs_write (STDERR_FILENO
, error_string
, strlen (error_string
));
2466 emacs_write (STDERR_FILENO
, "\n", 1);
2471 /* Return a struct timeval that is roughly equivalent to T.
2472 Use the least timeval not less than T.
2473 Return an extremal value if the result would overflow. */
2475 make_timeval (struct timespec t
)
2478 tv
.tv_sec
= t
.tv_sec
;
2479 tv
.tv_usec
= t
.tv_nsec
/ 1000;
2481 if (t
.tv_nsec
% 1000 != 0)
2483 if (tv
.tv_usec
< 999999)
2485 else if (tv
.tv_sec
< TYPE_MAXIMUM (time_t))
2495 /* Set the access and modification time stamps of FD (a.k.a. FILE) to be
2496 ATIME and MTIME, respectively.
2497 FD must be either negative -- in which case it is ignored --
2498 or a file descriptor that is open on FILE.
2499 If FD is nonnegative, then FILE can be NULL. */
2501 set_file_times (int fd
, const char *filename
,
2502 struct timespec atime
, struct timespec mtime
)
2504 struct timespec timespec
[2];
2505 timespec
[0] = atime
;
2506 timespec
[1] = mtime
;
2507 return fdutimens (fd
, filename
, timespec
);
2510 /* Like strsignal, except async-signal-safe, and this function typically
2511 returns a string in the C locale rather than the current locale. */
2513 safe_strsignal (int code
)
2515 char const *signame
= 0;
2517 if (0 <= code
&& code
< sys_siglist_entries
)
2518 signame
= sys_siglist
[code
];
2520 signame
= "Unknown signal";
2526 /* For make-serial-process */
2528 serial_open (Lisp_Object port
)
2530 int fd
= emacs_open (SSDATA (port
), O_RDWR
| O_NOCTTY
| O_NONBLOCK
, 0);
2532 report_file_error ("Opening serial port", port
);
2534 ioctl (fd
, TIOCEXCL
, (char *) 0);
2540 #if !defined (HAVE_CFMAKERAW)
2541 /* Workaround for targets which are missing cfmakeraw. */
2542 /* Pasted from man page. */
2544 cfmakeraw (struct termios
*termios_p
)
2546 termios_p
->c_iflag
&= ~(IGNBRK
|BRKINT
|PARMRK
|ISTRIP
|INLCR
|IGNCR
|ICRNL
|IXON
);
2547 termios_p
->c_oflag
&= ~OPOST
;
2548 termios_p
->c_lflag
&= ~(ECHO
|ECHONL
|ICANON
|ISIG
|IEXTEN
);
2549 termios_p
->c_cflag
&= ~(CSIZE
|PARENB
);
2550 termios_p
->c_cflag
|= CS8
;
2552 #endif /* !defined (HAVE_CFMAKERAW */
2554 #if !defined (HAVE_CFSETSPEED)
2555 /* Workaround for targets which are missing cfsetspeed. */
2557 cfsetspeed (struct termios
*termios_p
, speed_t vitesse
)
2559 return (cfsetispeed (termios_p
, vitesse
)
2560 + cfsetospeed (termios_p
, vitesse
));
2564 /* For serial-process-configure */
2566 serial_configure (struct Lisp_Process
*p
,
2567 Lisp_Object contact
)
2569 Lisp_Object childp2
= Qnil
;
2570 Lisp_Object tem
= Qnil
;
2571 struct termios attr
;
2573 char summary
[4] = "???"; /* This usually becomes "8N1". */
2575 childp2
= Fcopy_sequence (p
->childp
);
2577 /* Read port attributes and prepare default configuration. */
2578 err
= tcgetattr (p
->outfd
, &attr
);
2580 report_file_error ("Failed tcgetattr", Qnil
);
2582 #if defined (CLOCAL)
2583 attr
.c_cflag
|= CLOCAL
;
2586 attr
.c_cflag
|= CREAD
;
2589 /* Configure speed. */
2590 if (!NILP (Fplist_member (contact
, QCspeed
)))
2591 tem
= Fplist_get (contact
, QCspeed
);
2593 tem
= Fplist_get (p
->childp
, QCspeed
);
2595 err
= cfsetspeed (&attr
, XINT (tem
));
2597 report_file_error ("Failed cfsetspeed", tem
);
2598 childp2
= Fplist_put (childp2
, QCspeed
, tem
);
2600 /* Configure bytesize. */
2601 if (!NILP (Fplist_member (contact
, QCbytesize
)))
2602 tem
= Fplist_get (contact
, QCbytesize
);
2604 tem
= Fplist_get (p
->childp
, QCbytesize
);
2606 tem
= make_number (8);
2608 if (XINT (tem
) != 7 && XINT (tem
) != 8)
2609 error (":bytesize must be nil (8), 7, or 8");
2610 summary
[0] = XINT (tem
) + '0';
2611 #if defined (CSIZE) && defined (CS7) && defined (CS8)
2612 attr
.c_cflag
&= ~CSIZE
;
2613 attr
.c_cflag
|= ((XINT (tem
) == 7) ? CS7
: CS8
);
2615 /* Don't error on bytesize 8, which should be set by cfmakeraw. */
2616 if (XINT (tem
) != 8)
2617 error ("Bytesize cannot be changed");
2619 childp2
= Fplist_put (childp2
, QCbytesize
, tem
);
2621 /* Configure parity. */
2622 if (!NILP (Fplist_member (contact
, QCparity
)))
2623 tem
= Fplist_get (contact
, QCparity
);
2625 tem
= Fplist_get (p
->childp
, QCparity
);
2626 if (!NILP (tem
) && !EQ (tem
, Qeven
) && !EQ (tem
, Qodd
))
2627 error (":parity must be nil (no parity), `even', or `odd'");
2628 #if defined (PARENB) && defined (PARODD) && defined (IGNPAR) && defined (INPCK)
2629 attr
.c_cflag
&= ~(PARENB
| PARODD
);
2630 attr
.c_iflag
&= ~(IGNPAR
| INPCK
);
2635 else if (EQ (tem
, Qeven
))
2638 attr
.c_cflag
|= PARENB
;
2639 attr
.c_iflag
|= (IGNPAR
| INPCK
);
2641 else if (EQ (tem
, Qodd
))
2644 attr
.c_cflag
|= (PARENB
| PARODD
);
2645 attr
.c_iflag
|= (IGNPAR
| INPCK
);
2648 /* Don't error on no parity, which should be set by cfmakeraw. */
2650 error ("Parity cannot be configured");
2652 childp2
= Fplist_put (childp2
, QCparity
, tem
);
2654 /* Configure stopbits. */
2655 if (!NILP (Fplist_member (contact
, QCstopbits
)))
2656 tem
= Fplist_get (contact
, QCstopbits
);
2658 tem
= Fplist_get (p
->childp
, QCstopbits
);
2660 tem
= make_number (1);
2662 if (XINT (tem
) != 1 && XINT (tem
) != 2)
2663 error (":stopbits must be nil (1 stopbit), 1, or 2");
2664 summary
[2] = XINT (tem
) + '0';
2665 #if defined (CSTOPB)
2666 attr
.c_cflag
&= ~CSTOPB
;
2667 if (XINT (tem
) == 2)
2668 attr
.c_cflag
|= CSTOPB
;
2670 /* Don't error on 1 stopbit, which should be set by cfmakeraw. */
2671 if (XINT (tem
) != 1)
2672 error ("Stopbits cannot be configured");
2674 childp2
= Fplist_put (childp2
, QCstopbits
, tem
);
2676 /* Configure flowcontrol. */
2677 if (!NILP (Fplist_member (contact
, QCflowcontrol
)))
2678 tem
= Fplist_get (contact
, QCflowcontrol
);
2680 tem
= Fplist_get (p
->childp
, QCflowcontrol
);
2681 if (!NILP (tem
) && !EQ (tem
, Qhw
) && !EQ (tem
, Qsw
))
2682 error (":flowcontrol must be nil (no flowcontrol), `hw', or `sw'");
2683 #if defined (CRTSCTS)
2684 attr
.c_cflag
&= ~CRTSCTS
;
2686 #if defined (CNEW_RTSCTS)
2687 attr
.c_cflag
&= ~CNEW_RTSCTS
;
2689 #if defined (IXON) && defined (IXOFF)
2690 attr
.c_iflag
&= ~(IXON
| IXOFF
);
2694 /* Already configured. */
2696 else if (EQ (tem
, Qhw
))
2698 #if defined (CRTSCTS)
2699 attr
.c_cflag
|= CRTSCTS
;
2700 #elif defined (CNEW_RTSCTS)
2701 attr
.c_cflag
|= CNEW_RTSCTS
;
2703 error ("Hardware flowcontrol (RTS/CTS) not supported");
2706 else if (EQ (tem
, Qsw
))
2708 #if defined (IXON) && defined (IXOFF)
2709 attr
.c_iflag
|= (IXON
| IXOFF
);
2711 error ("Software flowcontrol (XON/XOFF) not supported");
2714 childp2
= Fplist_put (childp2
, QCflowcontrol
, tem
);
2716 /* Activate configuration. */
2717 err
= tcsetattr (p
->outfd
, TCSANOW
, &attr
);
2719 report_file_error ("Failed tcsetattr", Qnil
);
2721 childp2
= Fplist_put (childp2
, QCsummary
, build_string (summary
));
2722 pset_childp (p
, childp2
);
2724 #endif /* not DOS_NT */
2726 /* System depended enumeration of and access to system processes a-la ps(1). */
2730 /* Process enumeration and access via /proc. */
2733 list_system_processes (void)
2735 Lisp_Object procdir
, match
, proclist
, next
;
2738 /* For every process on the system, there's a directory in the
2739 "/proc" pseudo-directory whose name is the numeric ID of that
2741 procdir
= build_string ("/proc");
2742 match
= build_string ("[0-9]+");
2743 proclist
= directory_files_internal (procdir
, Qnil
, match
, Qt
, 0, Qnil
);
2745 /* `proclist' gives process IDs as strings. Destructively convert
2746 each string into a number. */
2747 for (tail
= proclist
; CONSP (tail
); tail
= next
)
2750 XSETCAR (tail
, Fstring_to_number (XCAR (tail
), Qnil
));
2753 /* directory_files_internal returns the files in reverse order; undo
2755 proclist
= Fnreverse (proclist
);
2759 #elif defined DARWIN_OS || defined __FreeBSD__
2762 list_system_processes (void)
2765 int mib
[] = {CTL_KERN
, KERN_PROC
, KERN_PROC_ALL
};
2767 int mib
[] = {CTL_KERN
, KERN_PROC
, KERN_PROC_PROC
};
2770 struct kinfo_proc
*procs
;
2773 Lisp_Object proclist
= Qnil
;
2775 if (sysctl (mib
, 3, NULL
, &len
, NULL
, 0) != 0)
2778 procs
= xmalloc (len
);
2779 if (sysctl (mib
, 3, procs
, &len
, NULL
, 0) != 0)
2785 len
/= sizeof (struct kinfo_proc
);
2786 for (i
= 0; i
< len
; i
++)
2789 proclist
= Fcons (make_fixnum_or_float (procs
[i
].kp_proc
.p_pid
), proclist
);
2791 proclist
= Fcons (make_fixnum_or_float (procs
[i
].ki_pid
), proclist
);
2800 /* The WINDOWSNT implementation is in w32.c.
2801 The MSDOS implementation is in dosfns.c. */
2802 #elif !defined (WINDOWSNT) && !defined (MSDOS)
2805 list_system_processes (void)
2810 #endif /* !defined (WINDOWSNT) */
2812 #if defined GNU_LINUX && defined HAVE_LONG_LONG_INT
2813 static struct timespec
2814 time_from_jiffies (unsigned long long tval
, long hz
)
2816 unsigned long long s
= tval
/ hz
;
2817 unsigned long long frac
= tval
% hz
;
2820 if (s
> TYPE_MAXIMUM (time_t))
2822 if (ULLONG_MAX
/ TIMESPEC_RESOLUTION
>= LONG_MAX
- 1
2823 || frac
<= ULLONG_MAX
/ TIMESPEC_RESOLUTION
)
2824 ns
= frac
* TIMESPEC_RESOLUTION
/ hz
;
2827 /* This is reachable only in the unlikely case that HZ * HZ
2828 exceeds ULLONG_MAX. It calculates an approximation that is
2829 guaranteed to be in range. */
2830 long hz_per_ns
= (hz
/ TIMESPEC_RESOLUTION
2831 + (hz
% TIMESPEC_RESOLUTION
!= 0));
2832 ns
= frac
/ hz_per_ns
;
2835 return make_timespec (s
, ns
);
2839 ltime_from_jiffies (unsigned long long tval
, long hz
)
2841 struct timespec t
= time_from_jiffies (tval
, hz
);
2842 return make_lisp_time (t
);
2845 static struct timespec
2849 struct timespec up
= make_timespec (0, 0);
2852 fup
= emacs_fopen ("/proc/uptime", "r");
2856 unsigned long long upsec
, upfrac
, idlesec
, idlefrac
;
2857 int upfrac_start
, upfrac_end
, idlefrac_start
, idlefrac_end
;
2859 if (fscanf (fup
, "%llu.%n%llu%n %llu.%n%llu%n",
2860 &upsec
, &upfrac_start
, &upfrac
, &upfrac_end
,
2861 &idlesec
, &idlefrac_start
, &idlefrac
, &idlefrac_end
)
2864 if (TYPE_MAXIMUM (time_t) < upsec
)
2866 upsec
= TYPE_MAXIMUM (time_t);
2867 upfrac
= TIMESPEC_RESOLUTION
- 1;
2871 int upfraclen
= upfrac_end
- upfrac_start
;
2872 for (; upfraclen
< LOG10_TIMESPEC_RESOLUTION
; upfraclen
++)
2874 for (; LOG10_TIMESPEC_RESOLUTION
< upfraclen
; upfraclen
--)
2876 upfrac
= min (upfrac
, TIMESPEC_RESOLUTION
- 1);
2878 up
= make_timespec (upsec
, upfrac
);
2887 #define MAJOR(d) (((unsigned)(d) >> 8) & 0xfff)
2888 #define MINOR(d) (((unsigned)(d) & 0xff) | (((unsigned)(d) & 0xfff00000) >> 12))
2891 procfs_ttyname (int rdev
)
2894 char name
[PATH_MAX
];
2897 fdev
= emacs_fopen ("/proc/tty/drivers", "r");
2903 unsigned long minor_beg
, minor_end
;
2904 char minor
[25]; /* 2 32-bit numbers + dash */
2907 for (; !feof (fdev
) && !ferror (fdev
); name
[0] = 0)
2909 if (fscanf (fdev
, "%*s %s %u %s %*s\n", name
, &major
, minor
) >= 3
2910 && major
== MAJOR (rdev
))
2912 minor_beg
= strtoul (minor
, &endp
, 0);
2914 minor_end
= minor_beg
;
2915 else if (*endp
== '-')
2916 minor_end
= strtoul (endp
+ 1, &endp
, 0);
2920 if (MINOR (rdev
) >= minor_beg
&& MINOR (rdev
) <= minor_end
)
2922 sprintf (name
+ strlen (name
), "%u", MINOR (rdev
));
2930 return build_string (name
);
2934 procfs_get_total_memory (void)
2937 uintmax_t retval
= 2 * 1024 * 1024; /* default: 2 GiB */
2941 fmem
= emacs_fopen ("/proc/meminfo", "r");
2945 uintmax_t entry_value
;
2949 switch (fscanf (fmem
, "MemTotal: %"SCNuMAX
, &entry_value
))
2952 retval
= entry_value
;
2957 while ((c
= getc (fmem
)) != EOF
&& c
!= '\n')
2975 system_process_attributes (Lisp_Object pid
)
2977 char procfn
[PATH_MAX
], fn
[PATH_MAX
];
2981 long clocks_per_sec
;
2983 char procbuf
[1025], *p
, *q
;
2986 static char const default_cmd
[] = "???";
2987 const char *cmd
= default_cmd
;
2988 int cmdsize
= sizeof default_cmd
- 1;
2989 char *cmdline
= NULL
;
2990 ptrdiff_t cmdline_size
;
2993 int ppid
, pgrp
, sess
, tty
, tpgid
, thcount
;
2996 unsigned long long u_time
, s_time
, cutime
, cstime
, start
;
2997 long priority
, niceness
, rss
;
2998 unsigned long minflt
, majflt
, cminflt
, cmajflt
, vsize
;
2999 struct timespec tnow
, tstart
, tboot
, telapsed
, us_time
;
3001 Lisp_Object attrs
= Qnil
;
3002 Lisp_Object cmd_str
, decoded_cmd
;
3005 CHECK_NUMBER_OR_FLOAT (pid
);
3006 CONS_TO_INTEGER (pid
, pid_t
, proc_id
);
3007 sprintf (procfn
, "/proc/%"pMd
, proc_id
);
3008 if (stat (procfn
, &st
) < 0)
3013 attrs
= Fcons (Fcons (Qeuid
, make_fixnum_or_float (uid
)), attrs
);
3015 pw
= getpwuid (uid
);
3018 attrs
= Fcons (Fcons (Quser
, build_string (pw
->pw_name
)), attrs
);
3021 attrs
= Fcons (Fcons (Qegid
, make_fixnum_or_float (gid
)), attrs
);
3023 gr
= getgrgid (gid
);
3026 attrs
= Fcons (Fcons (Qgroup
, build_string (gr
->gr_name
)), attrs
);
3028 count
= SPECPDL_INDEX ();
3029 strcpy (fn
, procfn
);
3030 procfn_end
= fn
+ strlen (fn
);
3031 strcpy (procfn_end
, "/stat");
3032 fd
= emacs_open (fn
, O_RDONLY
, 0);
3037 record_unwind_protect_int (close_file_unwind
, fd
);
3038 nread
= emacs_read (fd
, procbuf
, sizeof procbuf
- 1);
3042 procbuf
[nread
] = '\0';
3045 p
= strchr (p
, '(');
3048 q
= strrchr (p
+ 1, ')');
3058 /* Command name is encoded in locale-coding-system; decode it. */
3059 cmd_str
= make_unibyte_string (cmd
, cmdsize
);
3060 decoded_cmd
= code_convert_string_norecord (cmd_str
,
3061 Vlocale_coding_system
, 0);
3062 attrs
= Fcons (Fcons (Qcomm
, decoded_cmd
), attrs
);
3064 /* state ppid pgrp sess tty tpgid . minflt cminflt majflt cmajflt
3065 utime stime cutime cstime priority nice thcount . start vsize rss */
3067 && (sscanf (q
+ 2, ("%c %d %d %d %d %d %*u %lu %lu %lu %lu "
3068 "%Lu %Lu %Lu %Lu %ld %ld %d %*d %Lu %lu %ld"),
3069 &c
, &ppid
, &pgrp
, &sess
, &tty
, &tpgid
,
3070 &minflt
, &cminflt
, &majflt
, &cmajflt
,
3071 &u_time
, &s_time
, &cutime
, &cstime
,
3072 &priority
, &niceness
, &thcount
, &start
, &vsize
, &rss
)
3077 state_str
[1] = '\0';
3078 attrs
= Fcons (Fcons (Qstate
, build_string (state_str
)), attrs
);
3079 attrs
= Fcons (Fcons (Qppid
, make_fixnum_or_float (ppid
)), attrs
);
3080 attrs
= Fcons (Fcons (Qpgrp
, make_fixnum_or_float (pgrp
)), attrs
);
3081 attrs
= Fcons (Fcons (Qsess
, make_fixnum_or_float (sess
)), attrs
);
3082 attrs
= Fcons (Fcons (Qttname
, procfs_ttyname (tty
)), attrs
);
3083 attrs
= Fcons (Fcons (Qtpgid
, make_fixnum_or_float (tpgid
)), attrs
);
3084 attrs
= Fcons (Fcons (Qminflt
, make_fixnum_or_float (minflt
)), attrs
);
3085 attrs
= Fcons (Fcons (Qmajflt
, make_fixnum_or_float (majflt
)), attrs
);
3086 attrs
= Fcons (Fcons (Qcminflt
, make_fixnum_or_float (cminflt
)),
3088 attrs
= Fcons (Fcons (Qcmajflt
, make_fixnum_or_float (cmajflt
)),
3090 clocks_per_sec
= sysconf (_SC_CLK_TCK
);
3091 if (clocks_per_sec
< 0)
3092 clocks_per_sec
= 100;
3093 attrs
= Fcons (Fcons (Qutime
,
3094 ltime_from_jiffies (u_time
, clocks_per_sec
)),
3096 attrs
= Fcons (Fcons (Qstime
,
3097 ltime_from_jiffies (s_time
, clocks_per_sec
)),
3099 attrs
= Fcons (Fcons (Qtime
,
3100 ltime_from_jiffies (s_time
+ u_time
,
3103 attrs
= Fcons (Fcons (Qcutime
,
3104 ltime_from_jiffies (cutime
, clocks_per_sec
)),
3106 attrs
= Fcons (Fcons (Qcstime
,
3107 ltime_from_jiffies (cstime
, clocks_per_sec
)),
3109 attrs
= Fcons (Fcons (Qctime
,
3110 ltime_from_jiffies (cstime
+ cutime
,
3113 attrs
= Fcons (Fcons (Qpri
, make_number (priority
)), attrs
);
3114 attrs
= Fcons (Fcons (Qnice
, make_number (niceness
)), attrs
);
3115 attrs
= Fcons (Fcons (Qthcount
, make_fixnum_or_float (thcount
)),
3117 tnow
= current_timespec ();
3118 telapsed
= get_up_time ();
3119 tboot
= timespec_sub (tnow
, telapsed
);
3120 tstart
= time_from_jiffies (start
, clocks_per_sec
);
3121 tstart
= timespec_add (tboot
, tstart
);
3122 attrs
= Fcons (Fcons (Qstart
, make_lisp_time (tstart
)), attrs
);
3123 attrs
= Fcons (Fcons (Qvsize
, make_fixnum_or_float (vsize
/ 1024)),
3125 attrs
= Fcons (Fcons (Qrss
, make_fixnum_or_float (4 * rss
)), attrs
);
3126 telapsed
= timespec_sub (tnow
, tstart
);
3127 attrs
= Fcons (Fcons (Qetime
, make_lisp_time (telapsed
)), attrs
);
3128 us_time
= time_from_jiffies (u_time
+ s_time
, clocks_per_sec
);
3129 pcpu
= timespectod (us_time
) / timespectod (telapsed
);
3132 attrs
= Fcons (Fcons (Qpcpu
, make_float (100 * pcpu
)), attrs
);
3133 pmem
= 4.0 * 100 * rss
/ procfs_get_total_memory ();
3136 attrs
= Fcons (Fcons (Qpmem
, make_float (pmem
)), attrs
);
3139 unbind_to (count
, Qnil
);
3142 strcpy (procfn_end
, "/cmdline");
3143 fd
= emacs_open (fn
, O_RDONLY
, 0);
3146 ptrdiff_t readsize
, nread_incr
;
3147 record_unwind_protect_int (close_file_unwind
, fd
);
3148 record_unwind_protect_nothing ();
3149 nread
= cmdline_size
= 0;
3153 cmdline
= xpalloc (cmdline
, &cmdline_size
, 2, STRING_BYTES_BOUND
, 1);
3154 set_unwind_protect_ptr (count
+ 1, xfree
, cmdline
);
3156 /* Leave room even if every byte needs escaping below. */
3157 readsize
= (cmdline_size
>> 1) - nread
;
3159 nread_incr
= emacs_read (fd
, cmdline
+ nread
, readsize
);
3160 nread
+= max (0, nread_incr
);
3162 while (nread_incr
== readsize
);
3166 /* We don't want trailing null characters. */
3167 for (p
= cmdline
+ nread
; p
> cmdline
&& !p
[-1]; p
--)
3170 /* Escape-quote whitespace and backslashes. */
3171 q
= cmdline
+ cmdline_size
;
3176 if (c_isspace (c
) || c
== '\\')
3180 nread
= cmdline
+ cmdline_size
- q
;
3185 nread
= cmdsize
+ 2;
3186 cmdline_size
= nread
+ 1;
3187 q
= cmdline
= xrealloc (cmdline
, cmdline_size
);
3188 set_unwind_protect_ptr (count
+ 1, xfree
, cmdline
);
3189 sprintf (cmdline
, "[%.*s]", cmdsize
, cmd
);
3191 /* Command line is encoded in locale-coding-system; decode it. */
3192 cmd_str
= make_unibyte_string (q
, nread
);
3193 decoded_cmd
= code_convert_string_norecord (cmd_str
,
3194 Vlocale_coding_system
, 0);
3195 unbind_to (count
, Qnil
);
3196 attrs
= Fcons (Fcons (Qargs
, decoded_cmd
), attrs
);
3202 #elif defined (SOLARIS2) && defined (HAVE_PROCFS)
3204 /* The <procfs.h> header does not like to be included if _LP64 is defined and
3205 __FILE_OFFSET_BITS == 64. This is an ugly workaround that. */
3206 #if !defined (_LP64) && defined (_FILE_OFFSET_BITS) && (_FILE_OFFSET_BITS == 64)
3207 #define PROCFS_FILE_OFFSET_BITS_HACK 1
3208 #undef _FILE_OFFSET_BITS
3210 #define PROCFS_FILE_OFFSET_BITS_HACK 0
3215 #if PROCFS_FILE_OFFSET_BITS_HACK == 1
3216 #define _FILE_OFFSET_BITS 64
3217 #ifdef _FILE_OFFSET_BITS /* Avoid unused-macro warnings. */
3219 #endif /* PROCFS_FILE_OFFSET_BITS_HACK == 1 */
3222 system_process_attributes (Lisp_Object pid
)
3224 char procfn
[PATH_MAX
], fn
[PATH_MAX
];
3229 struct psinfo pinfo
;
3235 Lisp_Object attrs
= Qnil
;
3236 Lisp_Object decoded_cmd
;
3239 CHECK_NUMBER_OR_FLOAT (pid
);
3240 CONS_TO_INTEGER (pid
, pid_t
, proc_id
);
3241 sprintf (procfn
, "/proc/%"pMd
, proc_id
);
3242 if (stat (procfn
, &st
) < 0)
3247 attrs
= Fcons (Fcons (Qeuid
, make_fixnum_or_float (uid
)), attrs
);
3249 pw
= getpwuid (uid
);
3252 attrs
= Fcons (Fcons (Quser
, build_string (pw
->pw_name
)), attrs
);
3255 attrs
= Fcons (Fcons (Qegid
, make_fixnum_or_float (gid
)), attrs
);
3257 gr
= getgrgid (gid
);
3260 attrs
= Fcons (Fcons (Qgroup
, build_string (gr
->gr_name
)), attrs
);
3262 count
= SPECPDL_INDEX ();
3263 strcpy (fn
, procfn
);
3264 procfn_end
= fn
+ strlen (fn
);
3265 strcpy (procfn_end
, "/psinfo");
3266 fd
= emacs_open (fn
, O_RDONLY
, 0);
3271 record_unwind_protect (close_file_unwind
, fd
);
3272 nread
= emacs_read (fd
, &pinfo
, sizeof pinfo
);
3275 if (nread
== sizeof pinfo
)
3277 attrs
= Fcons (Fcons (Qppid
, make_fixnum_or_float (pinfo
.pr_ppid
)), attrs
);
3278 attrs
= Fcons (Fcons (Qpgrp
, make_fixnum_or_float (pinfo
.pr_pgid
)), attrs
);
3279 attrs
= Fcons (Fcons (Qsess
, make_fixnum_or_float (pinfo
.pr_sid
)), attrs
);
3283 state_str
[0] = pinfo
.pr_lwp
.pr_sname
;
3284 state_str
[1] = '\0';
3285 attrs
= Fcons (Fcons (Qstate
, build_string (state_str
)), attrs
);
3288 /* FIXME: missing Qttyname. psinfo.pr_ttydev is a dev_t,
3289 need to get a string from it. */
3291 /* FIXME: missing: Qtpgid */
3303 Are they available? */
3305 attrs
= Fcons (Fcons (Qtime
, make_lisp_time (pinfo
.pr_time
)), attrs
);
3306 attrs
= Fcons (Fcons (Qctime
, make_lisp_time (pinfo
.pr_ctime
)), attrs
);
3307 attrs
= Fcons (Fcons (Qpri
, make_number (pinfo
.pr_lwp
.pr_pri
)), attrs
);
3308 attrs
= Fcons (Fcons (Qnice
, make_number (pinfo
.pr_lwp
.pr_nice
)), attrs
);
3309 attrs
= Fcons (Fcons (Qthcount
, make_fixnum_or_float (pinfo
.pr_nlwp
)),
3312 attrs
= Fcons (Fcons (Qstart
, make_lisp_time (pinfo
.pr_start
)), attrs
);
3313 attrs
= Fcons (Fcons (Qvsize
, make_fixnum_or_float (pinfo
.pr_size
)),
3315 attrs
= Fcons (Fcons (Qrss
, make_fixnum_or_float (pinfo
.pr_rssize
)),
3318 /* pr_pctcpu and pr_pctmem are unsigned integers in the
3319 range 0 .. 2**15, representing 0.0 .. 1.0. */
3320 attrs
= Fcons (Fcons (Qpcpu
,
3321 make_float (100.0 / 0x8000 * pinfo
.pr_pctcpu
)),
3323 attrs
= Fcons (Fcons (Qpmem
,
3324 make_float (100.0 / 0x8000 * pinfo
.pr_pctmem
)),
3327 decoded_cmd
= (code_convert_string_norecord
3328 (build_unibyte_string (pinfo
.pr_fname
),
3329 Vlocale_coding_system
, 0));
3330 attrs
= Fcons (Fcons (Qcomm
, decoded_cmd
), attrs
);
3331 decoded_cmd
= (code_convert_string_norecord
3332 (build_unibyte_string (pinfo
.pr_psargs
),
3333 Vlocale_coding_system
, 0));
3334 attrs
= Fcons (Fcons (Qargs
, decoded_cmd
), attrs
);
3336 unbind_to (count
, Qnil
);
3340 #elif defined __FreeBSD__
3342 static struct timespec
3343 timeval_to_timespec (struct timeval t
)
3345 return make_timespec (t
.tv_sec
, t
.tv_usec
* 1000);
3349 make_lisp_timeval (struct timeval t
)
3351 return make_lisp_time (timeval_to_timespec (t
));
3355 system_process_attributes (Lisp_Object pid
)
3358 int pagesize
= getpagesize ();
3359 unsigned long npages
;
3365 char args
[MAXPATHLEN
];
3366 struct timespec t
, now
;
3368 int mib
[4] = {CTL_KERN
, KERN_PROC
, KERN_PROC_PID
};
3369 struct kinfo_proc proc
;
3370 size_t proclen
= sizeof proc
;
3372 Lisp_Object attrs
= Qnil
;
3373 Lisp_Object decoded_comm
;
3375 CHECK_NUMBER_OR_FLOAT (pid
);
3376 CONS_TO_INTEGER (pid
, int, proc_id
);
3379 if (sysctl (mib
, 4, &proc
, &proclen
, NULL
, 0) != 0)
3382 attrs
= Fcons (Fcons (Qeuid
, make_fixnum_or_float (proc
.ki_uid
)), attrs
);
3385 pw
= getpwuid (proc
.ki_uid
);
3388 attrs
= Fcons (Fcons (Quser
, build_string (pw
->pw_name
)), attrs
);
3390 attrs
= Fcons (Fcons (Qegid
, make_fixnum_or_float (proc
.ki_svgid
)), attrs
);
3393 gr
= getgrgid (proc
.ki_svgid
);
3396 attrs
= Fcons (Fcons (Qgroup
, build_string (gr
->gr_name
)), attrs
);
3398 decoded_comm
= (code_convert_string_norecord
3399 (build_unibyte_string (proc
.ki_comm
),
3400 Vlocale_coding_system
, 0));
3402 attrs
= Fcons (Fcons (Qcomm
, decoded_comm
), attrs
);
3404 char state
[2] = {'\0', '\0'};
3405 switch (proc
.ki_stat
)
3427 attrs
= Fcons (Fcons (Qstate
, build_string (state
)), attrs
);
3430 attrs
= Fcons (Fcons (Qppid
, make_fixnum_or_float (proc
.ki_ppid
)), attrs
);
3431 attrs
= Fcons (Fcons (Qpgrp
, make_fixnum_or_float (proc
.ki_pgid
)), attrs
);
3432 attrs
= Fcons (Fcons (Qsess
, make_fixnum_or_float (proc
.ki_sid
)), attrs
);
3435 ttyname
= proc
.ki_tdev
== NODEV
? NULL
: devname (proc
.ki_tdev
, S_IFCHR
);
3438 attrs
= Fcons (Fcons (Qtty
, build_string (ttyname
)), attrs
);
3440 attrs
= Fcons (Fcons (Qtpgid
, make_fixnum_or_float (proc
.ki_tpgid
)), attrs
);
3441 attrs
= Fcons (Fcons (Qminflt
, make_fixnum_or_float (proc
.ki_rusage
.ru_minflt
)), attrs
);
3442 attrs
= Fcons (Fcons (Qmajflt
, make_fixnum_or_float (proc
.ki_rusage
.ru_majflt
)), attrs
);
3443 attrs
= Fcons (Fcons (Qcminflt
, make_number (proc
.ki_rusage_ch
.ru_minflt
)), attrs
);
3444 attrs
= Fcons (Fcons (Qcmajflt
, make_number (proc
.ki_rusage_ch
.ru_majflt
)), attrs
);
3446 attrs
= Fcons (Fcons (Qutime
, make_lisp_timeval (proc
.ki_rusage
.ru_utime
)),
3448 attrs
= Fcons (Fcons (Qstime
, make_lisp_timeval (proc
.ki_rusage
.ru_stime
)),
3450 t
= timespec_add (timeval_to_timespec (proc
.ki_rusage
.ru_utime
),
3451 timeval_to_timespec (proc
.ki_rusage
.ru_stime
));
3452 attrs
= Fcons (Fcons (Qtime
, make_lisp_time (t
)), attrs
);
3454 attrs
= Fcons (Fcons (Qcutime
,
3455 make_lisp_timeval (proc
.ki_rusage_ch
.ru_utime
)),
3457 attrs
= Fcons (Fcons (Qcstime
,
3458 make_lisp_timeval (proc
.ki_rusage_ch
.ru_utime
)),
3460 t
= timespec_add (timeval_to_timespec (proc
.ki_rusage_ch
.ru_utime
),
3461 timeval_to_timespec (proc
.ki_rusage_ch
.ru_stime
));
3462 attrs
= Fcons (Fcons (Qctime
, make_lisp_time (t
)), attrs
);
3464 attrs
= Fcons (Fcons (Qthcount
, make_fixnum_or_float (proc
.ki_numthreads
)),
3466 attrs
= Fcons (Fcons (Qpri
, make_number (proc
.ki_pri
.pri_native
)), attrs
);
3467 attrs
= Fcons (Fcons (Qnice
, make_number (proc
.ki_nice
)), attrs
);
3468 attrs
= Fcons (Fcons (Qstart
, make_lisp_timeval (proc
.ki_start
)), attrs
);
3469 attrs
= Fcons (Fcons (Qvsize
, make_number (proc
.ki_size
>> 10)), attrs
);
3470 attrs
= Fcons (Fcons (Qrss
, make_number (proc
.ki_rssize
* pagesize
>> 10)),
3473 now
= current_timespec ();
3474 t
= timespec_sub (now
, timeval_to_timespec (proc
.ki_start
));
3475 attrs
= Fcons (Fcons (Qetime
, make_lisp_time (t
)), attrs
);
3477 len
= sizeof fscale
;
3478 if (sysctlbyname ("kern.fscale", &fscale
, &len
, NULL
, 0) == 0)
3483 if (sysctlbyname ("kern.ccpu", &ccpu
, &len
, NULL
, 0) == 0)
3485 pcpu
= (100.0 * proc
.ki_pctcpu
/ fscale
3486 / (1 - exp (proc
.ki_swtime
* log ((double) ccpu
/ fscale
))));
3487 attrs
= Fcons (Fcons (Qpcpu
, make_fixnum_or_float (pcpu
)), attrs
);
3491 len
= sizeof npages
;
3492 if (sysctlbyname ("hw.availpages", &npages
, &len
, NULL
, 0) == 0)
3494 double pmem
= (proc
.ki_flag
& P_INMEM
3495 ? 100.0 * proc
.ki_rssize
/ npages
3497 attrs
= Fcons (Fcons (Qpmem
, make_fixnum_or_float (pmem
)), attrs
);
3500 mib
[2] = KERN_PROC_ARGS
;
3502 if (sysctl (mib
, 4, args
, &len
, NULL
, 0) == 0)
3505 for (i
= 0; i
< len
; i
++)
3507 if (! args
[i
] && i
< len
- 1)
3512 (code_convert_string_norecord
3513 (build_unibyte_string (args
),
3514 Vlocale_coding_system
, 0));
3516 attrs
= Fcons (Fcons (Qargs
, decoded_comm
), attrs
);
3522 /* The WINDOWSNT implementation is in w32.c.
3523 The MSDOS implementation is in dosfns.c. */
3524 #elif !defined (WINDOWSNT) && !defined (MSDOS)
3527 system_process_attributes (Lisp_Object pid
)
3532 #endif /* !defined (WINDOWSNT) */
3534 /* Wide character string collation. */
3536 #ifdef __STDC_ISO_10646__
3538 # include <wctype.h>
3540 # if defined HAVE_NEWLOCALE || defined HAVE_SETLOCALE
3541 # include <locale.h>
3544 # define LC_COLLATE 0
3546 # ifndef LC_COLLATE_MASK
3547 # define LC_COLLATE_MASK 0
3552 # ifndef LC_CTYPE_MASK
3553 # define LC_CTYPE_MASK 0
3556 # ifndef HAVE_NEWLOCALE
3562 # define freelocale emacs_freelocale
3563 # define locale_t emacs_locale_t
3564 # define newlocale emacs_newlocale
3565 # define wcscoll_l emacs_wcscoll_l
3566 # define towlower_l emacs_towlower_l
3568 typedef char const *locale_t
;
3571 newlocale (int category_mask
, char const *locale
, locale_t loc
)
3577 freelocale (locale_t loc
)
3582 emacs_setlocale (int category
, char const *locale
)
3584 # ifdef HAVE_SETLOCALE
3586 char *loc
= setlocale (category
, locale
);
3597 wcscoll_l (wchar_t const *a
, wchar_t const *b
, locale_t loc
)
3600 char *oldloc
= emacs_setlocale (LC_COLLATE
, NULL
);
3608 char *oldcopy
= SAFE_ALLOCA (strlen (oldloc
) + 1);
3609 strcpy (oldcopy
, oldloc
);
3610 if (! emacs_setlocale (LC_COLLATE
, loc
))
3615 result
= wcscoll (a
, b
);
3617 if (! emacs_setlocale (LC_COLLATE
, oldcopy
))
3628 towlower_l (wint_t wc
, locale_t loc
)
3631 char *oldloc
= emacs_setlocale (LC_CTYPE
, NULL
);
3636 char *oldcopy
= SAFE_ALLOCA (strlen (oldloc
) + 1);
3637 strcpy (oldcopy
, oldloc
);
3638 if (emacs_setlocale (LC_CTYPE
, loc
))
3640 result
= towlower (wc
);
3641 emacs_setlocale (LC_COLLATE
, oldcopy
);
3651 str_collate (Lisp_Object s1
, Lisp_Object s2
,
3652 Lisp_Object locale
, Lisp_Object ignore_case
)
3655 ptrdiff_t len
, i
, i_byte
;
3660 /* Convert byte stream to code points. */
3661 len
= SCHARS (s1
); i
= i_byte
= 0;
3662 SAFE_NALLOCA (p1
, 1, len
+ 1);
3664 FETCH_STRING_CHAR_ADVANCE (*(p1
+i
-1), s1
, i
, i_byte
);
3667 len
= SCHARS (s2
); i
= i_byte
= 0;
3668 SAFE_NALLOCA (p2
, 1, len
+ 1);
3670 FETCH_STRING_CHAR_ADVANCE (*(p2
+i
-1), s2
, i
, i_byte
);
3673 if (STRINGP (locale
))
3675 locale_t loc
= newlocale (LC_COLLATE_MASK
| LC_CTYPE_MASK
,
3676 SSDATA (locale
), 0);
3678 error ("Invalid locale %s: %s", SSDATA (locale
), strerror (errno
));
3680 if (! NILP (ignore_case
))
3681 for (int i
= 1; i
< 3; i
++)
3683 wchar_t *p
= (i
== 1) ? p1
: p2
;
3685 *p
= towlower_l (*p
, loc
);
3689 res
= wcscoll_l (p1
, p2
, loc
);
3695 if (! NILP (ignore_case
))
3696 for (int i
= 1; i
< 3; i
++)
3698 wchar_t *p
= (i
== 1) ? p1
: p2
;
3704 res
= wcscoll (p1
, p2
);
3707 # ifndef HAVE_NEWLOCALE
3709 error ("Invalid locale or string for collation: %s", strerror (err
));
3712 error ("Invalid string for collation: %s", strerror (err
));
3718 #endif /* __STDC_ISO_10646__ */
3722 str_collate (Lisp_Object s1
, Lisp_Object s2
,
3723 Lisp_Object locale
, Lisp_Object ignore_case
)
3726 char *loc
= STRINGP (locale
) ? SSDATA (locale
) : NULL
;
3727 int res
, err
= errno
;
3730 res
= w32_compare_strings (SDATA (s1
), SDATA (s2
), loc
, !NILP (ignore_case
));
3732 error ("Invalid string for collation: %s", strerror (errno
));
3737 #endif /* WINDOWSNT */