1 /* Interfaces to system-dependent kernel and library entries.
2 Copyright (C) 1985-1988, 1993-1995, 1999-2016 Free Software
5 This file is part of GNU Emacs.
7 GNU Emacs is free software: you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation, either version 3 of the License, or
10 (at your option) any later version.
12 GNU Emacs is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
27 #endif /* HAVE_PWD_H */
36 #include "sysselect.h"
37 #include "blockinput.h"
39 #if defined DARWIN_OS || defined __FreeBSD__
40 # include <sys/sysctl.h>
44 /* Sparc/ARM machine/frame.h has 'struct frame' which conflicts with Emacs's
45 'struct frame', so rename it. */
46 # define frame freebsd_frame
47 # include <sys/user.h>
55 #define write sys_write
57 #define STDERR_FILENO fileno(GetStdHandle(STD_ERROR_HANDLE))
60 #endif /* not WINDOWSNT */
62 #include <sys/types.h>
66 /* Get SI_SRPC_DOMAIN, if it is available. */
67 #ifdef HAVE_SYS_SYSTEMINFO_H
68 #include <sys/systeminfo.h>
71 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida, MW Aug 1993 */
75 #include <sys/param.h>
82 #ifdef HAVE_SYS_UTSNAME_H
83 #include <sys/utsname.h>
85 #endif /* HAVE_SYS_UTSNAME_H */
89 #include "termhooks.h"
96 /* MS-Windows loads GnuTLS at run time, if available; we don't want to
97 do that during startup just to call gnutls_rnd. */
98 #if 0x020c00 <= GNUTLS_VERSION_NUMBER && !defined WINDOWSNT
99 # include <gnutls/crypto.h>
101 # define emacs_gnutls_global_init() Qnil
102 # define gnutls_rnd(level, data, len) (-1)
107 /* In process.h which conflicts with the local copy. */
109 int _cdecl
_spawnlp (int, const char *, const char *, ...);
110 int _cdecl
_getpid (void);
111 /* The following is needed for O_CLOEXEC, F_SETFD, FD_CLOEXEC, and
112 several prototypes of functions called below. */
113 #include <sys/socket.h>
116 #include "syssignal.h"
119 /* ULLONG_MAX is missing on Red Hat Linux 7.3; see Bug#11781. */
121 #define ULLONG_MAX TYPE_MAXIMUM (unsigned long long int)
124 /* Declare here, including term.h is problematic on some systems. */
125 extern void tputs (const char *, int, int (*)(int));
127 static const int baud_convert
[] =
129 0, 50, 75, 110, 135, 150, 200, 300, 600, 1200,
130 1800, 2400, 4800, 9600, 19200, 38400
133 /* Return the current working directory. The result should be freed
134 with 'free'. Return NULL on errors. */
136 emacs_get_current_dir_name (void)
138 # if HAVE_GET_CURRENT_DIR_NAME && !BROKEN_GET_CURRENT_DIR_NAME
139 # ifdef HYBRID_MALLOC
140 bool use_libc
= bss_sbrk_did_unexec
;
142 bool use_libc
= true;
145 return get_current_dir_name ();
149 char *pwd
= getenv ("PWD");
150 struct stat dotstat
, pwdstat
;
151 /* If PWD is accurate, use it instead of calling getcwd. PWD is
152 sometimes a nicer name, and using it may avoid a fatal error if a
153 parent directory is searchable but not readable. */
155 && (IS_DIRECTORY_SEP (*pwd
) || (*pwd
&& IS_DEVICE_SEP (pwd
[1])))
156 && stat (pwd
, &pwdstat
) == 0
157 && stat (".", &dotstat
) == 0
158 && dotstat
.st_ino
== pwdstat
.st_ino
159 && dotstat
.st_dev
== pwdstat
.st_dev
161 && strlen (pwd
) < MAXPATHLEN
165 buf
= malloc (strlen (pwd
) + 1);
172 size_t buf_size
= 1024;
173 buf
= malloc (buf_size
);
178 if (getcwd (buf
, buf_size
) == buf
)
182 int tmp_errno
= errno
;
188 buf
= realloc (buf
, buf_size
);
197 /* Discard pending input on all input descriptors. */
200 discard_tty_input (void)
203 struct emacs_tty buf
;
208 #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */
209 while (dos_keyread () != -1)
211 #else /* not MSDOS */
213 struct tty_display_info
*tty
;
214 for (tty
= tty_list
; tty
; tty
= tty
->next
)
216 if (tty
->input
) /* Is the device suspended? */
218 emacs_get_tty (fileno (tty
->input
), &buf
);
219 emacs_set_tty (fileno (tty
->input
), &buf
, 0);
223 #endif /* not MSDOS */
224 #endif /* not WINDOWSNT */
230 /* Arrange for character C to be read as the next input from
232 XXX What if we have multiple ttys?
238 if (! (FRAMEP (selected_frame
)
239 && FRAME_LIVE_P (XFRAME (selected_frame
))
240 && FRAME_TERMCAP_P (XFRAME (selected_frame
))))
243 /* Should perhaps error if in batch mode */
245 ioctl (fileno (CURTTY()->input
), TIOCSTI
, &c
);
246 #else /* no TIOCSTI */
247 error ("Cannot stuff terminal input characters in this version of Unix");
248 #endif /* no TIOCSTI */
254 init_baud_rate (int fd
)
264 #else /* not DOS_NT */
269 emacs_ospeed
= cfgetospeed (&sg
);
270 #endif /* not DOS_NT */
273 baud_rate
= (emacs_ospeed
< ARRAYELTS (baud_convert
)
274 ? baud_convert
[emacs_ospeed
] : 9600);
283 /* Wait for the subprocess with process id CHILD to terminate or change status.
284 CHILD must be a child process that has not been reaped.
285 If STATUS is non-null, store the waitpid-style exit status into *STATUS
286 and tell wait_reading_process_output that it needs to look around.
287 Use waitpid-style OPTIONS when waiting.
288 If INTERRUPTIBLE, this function is interruptible by a signal.
290 Return CHILD if successful, 0 if no status is available;
291 the latter is possible only when options & NOHANG. */
293 get_child_status (pid_t child
, int *status
, int options
, bool interruptible
)
297 /* Invoke waitpid only with a known process ID; do not invoke
298 waitpid with a nonpositive argument. Otherwise, Emacs might
299 reap an unwanted process by mistake. For example, invoking
300 waitpid (-1, ...) can mess up glib by reaping glib's subprocesses,
301 so that another thread running glib won't find them. */
304 while ((pid
= waitpid (child
, status
, options
)) < 0)
306 /* Check that CHILD is a child process that has not been reaped,
307 and that STATUS and OPTIONS are valid. Otherwise abort,
308 as continuing after this internal error could cause Emacs to
309 become confused and kill innocent-victim processes. */
313 /* Note: the MS-Windows emulation of waitpid calls QUIT
319 /* If successful and status is requested, tell wait_reading_process_output
320 that it needs to wake up and look around. */
321 if (pid
&& status
&& input_available_clear_time
)
322 *input_available_clear_time
= make_timespec (0, 0);
327 /* Wait for the subprocess with process id CHILD to terminate.
328 CHILD must be a child process that has not been reaped.
329 If STATUS is non-null, store the waitpid-style exit status into *STATUS
330 and tell wait_reading_process_output that it needs to look around.
331 If INTERRUPTIBLE, this function is interruptible by a signal. */
333 wait_for_termination (pid_t child
, int *status
, bool interruptible
)
335 get_child_status (child
, status
, 0, interruptible
);
338 /* Report whether the subprocess with process id CHILD has changed status.
339 Termination counts as a change of status.
340 CHILD must be a child process that has not been reaped.
341 If STATUS is non-null, store the waitpid-style exit status into *STATUS
342 and tell wait_reading_process_output that it needs to look around.
343 Use waitpid-style OPTIONS to check status, but do not wait.
345 Return CHILD if successful, 0 if no status is available because
346 the process's state has not changed. */
348 child_status_changed (pid_t child
, int *status
, int options
)
350 return get_child_status (child
, status
, WNOHANG
| options
, 0);
354 /* Set up the terminal at the other end of a pseudo-terminal that
355 we will be controlling an inferior through.
356 It should not echo or do line-editing, since that is done
357 in Emacs. No padding needed for insertion into an Emacs buffer. */
360 child_setup_tty (int out
)
365 emacs_get_tty (out
, &s
);
366 s
.main
.c_oflag
|= OPOST
; /* Enable output postprocessing */
367 s
.main
.c_oflag
&= ~ONLCR
; /* Disable map of NL to CR-NL on output */
369 /* http://lists.gnu.org/archive/html/emacs-devel/2008-05/msg00406.html
370 Some versions of GNU Hurd do not have FFDLY? */
372 s
.main
.c_oflag
&= ~(NLDLY
|CRDLY
|TABDLY
|BSDLY
|VTDLY
|FFDLY
);
373 /* No output delays */
375 s
.main
.c_oflag
&= ~(NLDLY
|CRDLY
|TABDLY
|BSDLY
|VTDLY
);
376 /* No output delays */
379 s
.main
.c_lflag
&= ~ECHO
; /* Disable echo */
380 s
.main
.c_lflag
|= ISIG
; /* Enable signals */
382 s
.main
.c_iflag
&= ~IUCLC
; /* Disable downcasing on input. */
385 s
.main
.c_iflag
&= ~ISTRIP
; /* don't strip 8th bit on input */
388 s
.main
.c_oflag
&= ~OLCUC
; /* Disable upcasing on output. */
390 s
.main
.c_oflag
&= ~TAB3
; /* Disable tab expansion */
391 s
.main
.c_cflag
= (s
.main
.c_cflag
& ~CSIZE
) | CS8
; /* Don't strip 8th bit */
392 s
.main
.c_cc
[VERASE
] = CDISABLE
; /* disable erase processing */
393 s
.main
.c_cc
[VKILL
] = CDISABLE
; /* disable kill processing */
396 s
.main
.c_cflag
= (s
.main
.c_cflag
& ~CBAUD
) | B9600
; /* baud rate sanity */
399 #ifdef SIGNALS_VIA_CHARACTERS
400 /* the QUIT and INTR character are used in process_send_signal
401 so set them here to something useful. */
402 if (s
.main
.c_cc
[VQUIT
] == CDISABLE
)
403 s
.main
.c_cc
[VQUIT
] = '\\'&037; /* Control-\ */
404 if (s
.main
.c_cc
[VINTR
] == CDISABLE
)
405 s
.main
.c_cc
[VINTR
] = 'C'&037; /* Control-C */
406 #endif /* not SIGNALS_VIA_CHARACTERS */
409 /* Also, PTY overloads NUL and BREAK.
410 don't ignore break, but don't signal either, so it looks like NUL. */
411 s
.main
.c_iflag
&= ~IGNBRK
;
412 s
.main
.c_iflag
&= ~BRKINT
;
413 /* rms: Formerly it set s.main.c_cc[VINTR] to 0377 here
414 unconditionally. Then a SIGNALS_VIA_CHARACTERS conditional
415 would force it to 0377. That looks like duplicated code. */
416 s
.main
.c_cflag
= (s
.main
.c_cflag
& ~CBAUD
) | B9600
; /* baud rate sanity */
419 /* We originally enabled ICANON (and set VEOF to 04), and then had
420 process.c send additional EOF chars to flush the output when faced
421 with long lines, but this leads to weird effects when the
422 subprocess has disabled ICANON and ends up seeing those spurious
423 extra EOFs. So we don't send EOFs any more in
424 process.c:send_process. First we tried to disable ICANON by
425 default, so if a subsprocess sets up ICANON, it's his problem (or
426 the Elisp package that talks to it) to deal with lines that are
427 too long. But this disables some features, such as the ability
428 to send EOF signals. So we re-enabled ICANON but there is no
429 more "send eof to flush" going on (which is wrong and unportable
430 in itself). The correct way to handle too much output is to
431 buffer what could not be written and then write it again when
432 select returns ok for writing. This has it own set of
433 problems. Write is now asynchronous, is that a problem? How much
434 do we buffer, and what do we do when that limit is reached? */
436 s
.main
.c_lflag
|= ICANON
; /* Enable line editing and eof processing */
437 s
.main
.c_cc
[VEOF
] = 'D'&037; /* Control-D */
438 #if 0 /* These settings only apply to non-ICANON mode. */
439 s
.main
.c_cc
[VMIN
] = 1;
440 s
.main
.c_cc
[VTIME
] = 0;
443 emacs_set_tty (out
, &s
, 0);
444 #endif /* not WINDOWSNT */
446 #endif /* not MSDOS */
449 /* Record a signal code and the action for it. */
453 struct sigaction action
;
456 static void save_signal_handlers (struct save_signal
*);
457 static void restore_signal_handlers (struct save_signal
*);
459 /* Suspend the Emacs process; give terminal to its superior. */
467 /* On a system where suspending is not implemented,
468 instead fork a subshell and let it talk directly to the terminal
475 /* Fork a subshell. */
480 #ifdef DOS_NT /* Demacs 1.1.2 91/10/20 Manabu Higashida */
483 char oldwd
[MAXPATHLEN
+1]; /* Fixed length is safe on MSDOS. */
485 char oldwd
[MAX_UTF8_PATH
];
490 struct save_signal saved_handlers
[5];
491 char *str
= SSDATA (encode_current_directory ());
497 char *volatile str_volatile
= str
;
504 error ("Can't spawn subshell");
506 saved_handlers
[0].code
= SIGINT
;
507 saved_handlers
[1].code
= SIGQUIT
;
508 saved_handlers
[2].code
= SIGTERM
;
510 saved_handlers
[3].code
= SIGIO
;
511 saved_handlers
[4].code
= 0;
513 saved_handlers
[3].code
= 0;
517 save_signal_handlers (saved_handlers
);
524 #ifdef DOS_NT /* MW, Aug 1993 */
525 getcwd (oldwd
, sizeof oldwd
);
527 sh
= egetenv ("SUSPEND"); /* KFS, 1994-12-14 */
530 sh
= egetenv ("SHELL");
534 /* Use our buffer's default directory for the subshell. */
535 if (chdir (str
) != 0)
539 _exit (EXIT_CANCELED
);
543 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */
545 char *epwd
= getenv ("PWD");
546 char old_pwd
[MAXPATHLEN
+1+4];
548 /* If PWD is set, pass it with corrected value. */
551 strcpy (old_pwd
, epwd
);
552 setenv ("PWD", str
, 1);
555 chdir (oldwd
); /* FIXME: Do the right thing on chdir failure. */
557 putenv (old_pwd
); /* restore previous value */
559 #else /* not MSDOS */
561 /* Waits for process completion */
562 pid
= _spawnlp (_P_WAIT
, sh
, sh
, NULL
);
563 chdir (oldwd
); /* FIXME: Do the right thing on chdir failure. */
565 write (1, "Can't execute subshell", 22);
566 #else /* not WINDOWSNT */
567 execlp (sh
, sh
, (char *) 0);
569 _exit (errno
== ENOENT
? EXIT_ENOENT
: EXIT_CANNOT_INVOKE
);
570 #endif /* not WINDOWSNT */
571 #endif /* not MSDOS */
574 /* Do this now if we did not do it before. */
576 save_signal_handlers (saved_handlers
);
580 wait_for_termination (pid
, &status
, 0);
582 restore_signal_handlers (saved_handlers
);
586 save_signal_handlers (struct save_signal
*saved_handlers
)
588 while (saved_handlers
->code
)
590 struct sigaction action
;
591 emacs_sigaction_init (&action
, SIG_IGN
);
592 sigaction (saved_handlers
->code
, &action
, &saved_handlers
->action
);
598 restore_signal_handlers (struct save_signal
*saved_handlers
)
600 while (saved_handlers
->code
)
602 sigaction (saved_handlers
->code
, &saved_handlers
->action
, 0);
608 static int old_fcntl_flags
[FD_SETSIZE
];
615 old_fcntl_flags
[fd
] = fcntl (fd
, F_GETFL
, 0) & ~FASYNC
;
616 fcntl (fd
, F_SETFL
, old_fcntl_flags
[fd
] | FASYNC
);
617 interrupts_deferred
= 0;
626 fcntl (fd
, F_SETFL
, old_fcntl_flags
[fd
]);
640 sigemptyset (&unblocked
);
642 sigaddset (&unblocked
, SIGWINCH
);
644 sigaddset (&unblocked
, SIGIO
);
645 pthread_sigmask (SIG_UNBLOCK
, &unblocked
, 0);
647 interrupts_deferred
= 0;
652 unrequest_sigio (void)
660 sigemptyset (&blocked
);
662 sigaddset (&blocked
, SIGWINCH
);
664 sigaddset (&blocked
, SIGIO
);
665 pthread_sigmask (SIG_BLOCK
, &blocked
, 0);
666 interrupts_deferred
= 1;
674 block_child_signal (sigset_t
*oldset
)
677 sigemptyset (&blocked
);
678 sigaddset (&blocked
, SIGCHLD
);
679 sigaddset (&blocked
, SIGINT
);
680 pthread_sigmask (SIG_BLOCK
, &blocked
, oldset
);
683 /* Unblock SIGCHLD. */
686 unblock_child_signal (sigset_t
const *oldset
)
688 pthread_sigmask (SIG_SETMASK
, oldset
, 0);
693 /* Saving and restoring the process group of Emacs's terminal. */
695 /* The process group of which Emacs was a member when it initially
698 If Emacs was in its own process group (i.e. inherited_pgroup ==
699 getpid ()), then we know we're running under a shell with job
700 control (Emacs would never be run as part of a pipeline).
703 If Emacs was not in its own process group, then we know we're
704 running under a shell (or a caller) that doesn't know how to
705 separate itself from Emacs (like sh). Emacs must be in its own
706 process group in order to receive SIGIO correctly. In this
707 situation, we put ourselves in our own pgroup, forcibly set the
708 tty's pgroup to our pgroup, and make sure to restore and reinstate
709 the tty's pgroup just like any other terminal setting. If
710 inherited_group was not the tty's pgroup, then we'll get a
711 SIGTTmumble when we try to change the tty's pgroup, and a CONT if
712 it goes foreground in the future, which is what should happen. */
714 static pid_t inherited_pgroup
;
717 init_foreground_group (void)
719 pid_t pgrp
= getpgrp ();
720 inherited_pgroup
= getpid () == pgrp
? 0 : pgrp
;
723 /* Block and unblock SIGTTOU. */
726 block_tty_out_signal (sigset_t
*oldset
)
730 sigemptyset (&blocked
);
731 sigaddset (&blocked
, SIGTTOU
);
732 pthread_sigmask (SIG_BLOCK
, &blocked
, oldset
);
737 unblock_tty_out_signal (sigset_t
const *oldset
)
740 pthread_sigmask (SIG_SETMASK
, oldset
, 0);
744 /* Safely set a controlling terminal FD's process group to PGID.
745 If we are not in the foreground already, POSIX requires tcsetpgrp
746 to deliver a SIGTTOU signal, which would stop us. This is an
747 annoyance, so temporarily ignore the signal.
749 In practice, platforms lacking SIGTTOU also lack tcsetpgrp, so
750 skip all this unless SIGTTOU is defined. */
752 tcsetpgrp_without_stopping (int fd
, pid_t pgid
)
757 block_tty_out_signal (&oldset
);
758 tcsetpgrp (fd
, pgid
);
759 unblock_tty_out_signal (&oldset
);
764 /* Split off the foreground process group to Emacs alone. When we are
765 in the foreground, but not started in our own process group,
766 redirect the tty device handle FD to point to our own process
767 group. FD must be the file descriptor of the controlling tty. */
769 narrow_foreground_group (int fd
)
771 if (inherited_pgroup
&& setpgid (0, 0) == 0)
772 tcsetpgrp_without_stopping (fd
, getpid ());
775 /* Set the tty to our original foreground group. */
777 widen_foreground_group (int fd
)
779 if (inherited_pgroup
&& setpgid (0, inherited_pgroup
) == 0)
780 tcsetpgrp_without_stopping (fd
, inherited_pgroup
);
783 /* Getting and setting emacs_tty structures. */
785 /* Set *TC to the parameters associated with the terminal FD,
786 or clear it if the parameters are not available.
787 Return 0 on success, -1 on failure. */
789 emacs_get_tty (int fd
, struct emacs_tty
*settings
)
791 /* Retrieve the primary parameters - baud rate, character size, etcetera. */
792 memset (&settings
->main
, 0, sizeof (settings
->main
));
795 HANDLE h
= (HANDLE
)_get_osfhandle (fd
);
798 if (h
&& h
!= INVALID_HANDLE_VALUE
&& GetConsoleMode (h
, &console_mode
))
800 settings
->main
= console_mode
;
803 #endif /* WINDOWSNT */
806 /* We have those nifty POSIX tcmumbleattr functions. */
807 return tcgetattr (fd
, &settings
->main
);
812 /* Set the parameters of the tty on FD according to the contents of
813 *SETTINGS. If FLUSHP, discard input.
814 Return 0 if all went well, and -1 (setting errno) if anything failed. */
817 emacs_set_tty (int fd
, struct emacs_tty
*settings
, bool flushp
)
819 /* Set the primary parameters - baud rate, character size, etcetera. */
822 HANDLE h
= (HANDLE
)_get_osfhandle (fd
);
824 if (h
&& h
!= INVALID_HANDLE_VALUE
)
828 /* Assume the handle is open for input. */
830 FlushConsoleInputBuffer (h
);
831 new_mode
= settings
->main
;
832 SetConsoleMode (h
, new_mode
);
834 #endif /* WINDOWSNT */
837 /* We have those nifty POSIX tcmumbleattr functions.
838 William J. Smith <wjs@wiis.wang.com> writes:
839 "POSIX 1003.1 defines tcsetattr to return success if it was
840 able to perform any of the requested actions, even if some
841 of the requested actions could not be performed.
842 We must read settings back to ensure tty setup properly.
843 AIX requires this to keep tty from hanging occasionally." */
844 /* This make sure that we don't loop indefinitely in here. */
845 for (i
= 0 ; i
< 10 ; i
++)
846 if (tcsetattr (fd
, flushp
? TCSAFLUSH
: TCSADRAIN
, &settings
->main
) < 0)
857 memset (&new, 0, sizeof (new));
858 /* Get the current settings, and see if they're what we asked for. */
859 tcgetattr (fd
, &new);
860 /* We cannot use memcmp on the whole structure here because under
861 * aix386 the termios structure has some reserved field that may
864 if ( new.c_iflag
== settings
->main
.c_iflag
865 && new.c_oflag
== settings
->main
.c_oflag
866 && new.c_cflag
== settings
->main
.c_cflag
867 && new.c_lflag
== settings
->main
.c_lflag
868 && memcmp (new.c_cc
, settings
->main
.c_cc
, NCCS
) == 0)
875 /* We have survived the tempest. */
882 static int old_fcntl_owner
[FD_SETSIZE
];
883 #endif /* F_SETOWN */
885 /* This may also be defined in stdio,
886 but if so, this does no harm,
887 and using the same name avoids wasting the other one's space. */
890 unsigned char _sobuf
[BUFSIZ
+8];
895 /* Initialize the terminal mode on all tty devices that are currently
899 init_all_sys_modes (void)
901 struct tty_display_info
*tty
;
902 for (tty
= tty_list
; tty
; tty
= tty
->next
)
903 init_sys_modes (tty
);
906 /* Initialize the terminal mode on the given tty device. */
909 init_sys_modes (struct tty_display_info
*tty_out
)
911 struct emacs_tty tty
;
912 Lisp_Object terminal
;
914 Vtty_erase_char
= Qnil
;
919 if (!tty_out
->output
)
920 return; /* The tty is suspended. */
922 narrow_foreground_group (fileno (tty_out
->input
));
924 if (! tty_out
->old_tty
)
925 tty_out
->old_tty
= xmalloc (sizeof *tty_out
->old_tty
);
927 emacs_get_tty (fileno (tty_out
->input
), tty_out
->old_tty
);
929 tty
= *tty_out
->old_tty
;
931 #if !defined (DOS_NT)
932 XSETINT (Vtty_erase_char
, tty
.main
.c_cc
[VERASE
]);
934 tty
.main
.c_iflag
|= (IGNBRK
); /* Ignore break condition */
935 tty
.main
.c_iflag
&= ~ICRNL
; /* Disable map of CR to NL on input */
936 #ifdef INLCR /* I'm just being cautious,
937 since I can't check how widespread INLCR is--rms. */
938 tty
.main
.c_iflag
&= ~INLCR
; /* Disable map of NL to CR on input */
941 tty
.main
.c_iflag
&= ~ISTRIP
; /* don't strip 8th bit on input */
943 tty
.main
.c_lflag
&= ~ECHO
; /* Disable echo */
944 tty
.main
.c_lflag
&= ~ICANON
; /* Disable erase/kill processing */
946 tty
.main
.c_lflag
&= ~IEXTEN
; /* Disable other editing characters. */
948 tty
.main
.c_lflag
|= ISIG
; /* Enable signals */
949 if (tty_out
->flow_control
)
951 tty
.main
.c_iflag
|= IXON
; /* Enable start/stop output control */
953 tty
.main
.c_iflag
&= ~IXANY
;
957 tty
.main
.c_iflag
&= ~IXON
; /* Disable start/stop output control */
958 tty
.main
.c_oflag
&= ~ONLCR
; /* Disable map of NL to CR-NL
960 tty
.main
.c_oflag
&= ~TAB3
; /* Disable tab expansion */
962 if (tty_out
->meta_key
)
964 tty
.main
.c_cflag
|= CS8
; /* allow 8th bit on input */
965 tty
.main
.c_cflag
&= ~PARENB
;/* Don't check parity */
969 XSETTERMINAL(terminal
, tty_out
->terminal
);
970 if (!NILP (Fcontrolling_tty_p (terminal
)))
972 tty
.main
.c_cc
[VINTR
] = quit_char
; /* C-g (usually) gives SIGINT */
973 /* Set up C-g for both SIGQUIT and SIGINT.
974 We don't know which we will get, but we handle both alike
975 so which one it really gives us does not matter. */
976 tty
.main
.c_cc
[VQUIT
] = quit_char
;
980 /* We normally don't get interrupt or quit signals from tty
981 devices other than our controlling terminal; therefore,
982 we must handle C-g as normal input. Unfortunately, this
983 means that the interrupt and quit feature must be
984 disabled on secondary ttys, or we would not even see the
987 Note that even though emacsclient could have special code
988 to pass SIGINT to Emacs, we should _not_ enable
989 interrupt/quit keys for emacsclient frames. This means
990 that we can't break out of loops in C code from a
991 secondary tty frame, but we can always decide what
992 display the C-g came from, which is more important from a
993 usability point of view. (Consider the case when two
994 people work together using the same Emacs instance.) */
995 tty
.main
.c_cc
[VINTR
] = CDISABLE
;
996 tty
.main
.c_cc
[VQUIT
] = CDISABLE
;
998 tty
.main
.c_cc
[VMIN
] = 1; /* Input should wait for at least 1 char */
999 tty
.main
.c_cc
[VTIME
] = 0; /* no matter how long that takes. */
1001 tty
.main
.c_cc
[VSWTCH
] = CDISABLE
; /* Turn off shell layering use
1006 tty
.main
.c_cc
[VSUSP
] = CDISABLE
; /* Turn off handling of C-z. */
1009 tty
.main
.c_cc
[V_DSUSP
] = CDISABLE
; /* Turn off handling of C-y. */
1010 #endif /* V_DSUSP */
1011 #ifdef VDSUSP /* Some systems have VDSUSP, some have V_DSUSP. */
1012 tty
.main
.c_cc
[VDSUSP
] = CDISABLE
;
1015 tty
.main
.c_cc
[VLNEXT
] = CDISABLE
;
1018 tty
.main
.c_cc
[VREPRINT
] = CDISABLE
;
1019 #endif /* VREPRINT */
1021 tty
.main
.c_cc
[VWERASE
] = CDISABLE
;
1022 #endif /* VWERASE */
1024 tty
.main
.c_cc
[VDISCARD
] = CDISABLE
;
1025 #endif /* VDISCARD */
1027 if (tty_out
->flow_control
)
1030 tty
.main
.c_cc
[VSTART
] = '\021';
1033 tty
.main
.c_cc
[VSTOP
] = '\023';
1039 tty
.main
.c_cc
[VSTART
] = CDISABLE
;
1042 tty
.main
.c_cc
[VSTOP
] = CDISABLE
;
1047 tty
.main
.c_cc
[VSTRT
] = CDISABLE
;
1048 tty
.main
.c_cc
[VSTOP
] = CDISABLE
;
1049 tty
.main
.c_cc
[VSUSP
] = CDISABLE
;
1050 tty
.main
.c_cc
[VDSUSP
] = CDISABLE
;
1051 if (tty_out
->flow_control
)
1054 tty
.main
.c_cc
[VSTART
] = '\021';
1057 tty
.main
.c_cc
[VSTOP
] = '\023';
1060 /* Also, PTY overloads NUL and BREAK.
1061 don't ignore break, but don't signal either, so it looks like NUL.
1062 This really serves a purpose only if running in an XTERM window
1063 or via TELNET or the like, but does no harm elsewhere. */
1064 tty
.main
.c_iflag
&= ~IGNBRK
;
1065 tty
.main
.c_iflag
&= ~BRKINT
;
1067 #endif /* not DOS_NT */
1069 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida, MW Aug 1993 */
1070 if (!tty_out
->term_initted
)
1071 internal_terminal_init ();
1072 dos_ttraw (tty_out
);
1075 emacs_set_tty (fileno (tty_out
->input
), &tty
, 0);
1077 /* This code added to insure that, if flow-control is not to be used,
1078 we have an unlocked terminal at the start. */
1081 if (!tty_out
->flow_control
) ioctl (fileno (tty_out
->input
), TCXONC
, 1);
1084 if (!tty_out
->flow_control
) ioctl (fileno (tty_out
->input
), TIOCSTART
, 0);
1087 #if !defined (DOS_NT)
1089 if (!tty_out
->flow_control
) tcflow (fileno (tty_out
->input
), TCOON
);
1094 if (interrupt_input
)
1096 old_fcntl_owner
[fileno (tty_out
->input
)] =
1097 fcntl (fileno (tty_out
->input
), F_GETOWN
, 0);
1098 fcntl (fileno (tty_out
->input
), F_SETOWN
, getpid ());
1099 init_sigio (fileno (tty_out
->input
));
1101 if (gpm_tty
== tty_out
)
1103 /* Arrange for mouse events to give us SIGIO signals. */
1104 fcntl (gpm_fd
, F_SETOWN
, getpid ());
1105 fcntl (gpm_fd
, F_SETFL
, fcntl (gpm_fd
, F_GETFL
, 0) | O_NONBLOCK
);
1106 init_sigio (gpm_fd
);
1108 #endif /* HAVE_GPM */
1110 #endif /* F_GETOWN */
1113 /* This symbol is defined on recent USG systems.
1114 Someone says without this call USG won't really buffer the file
1115 even with a call to setbuf. */
1116 setvbuf (tty_out
->output
, (char *) _sobuf
, _IOFBF
, sizeof _sobuf
);
1118 setbuf (tty_out
->output
, (char *) _sobuf
);
1121 if (tty_out
->terminal
->set_terminal_modes_hook
)
1122 tty_out
->terminal
->set_terminal_modes_hook (tty_out
->terminal
);
1124 if (!tty_out
->term_initted
)
1126 Lisp_Object tail
, frame
;
1127 FOR_EACH_FRAME (tail
, frame
)
1129 /* XXX This needs to be revised. */
1130 if (FRAME_TERMCAP_P (XFRAME (frame
))
1131 && FRAME_TTY (XFRAME (frame
)) == tty_out
)
1132 init_frame_faces (XFRAME (frame
));
1136 if (tty_out
->term_initted
&& no_redraw_on_reenter
)
1138 /* We used to call "direct_output_forward_char(0)" here,
1139 but it's not clear why, since it may not do anything anyway. */
1143 Lisp_Object tail
, frame
;
1145 FOR_EACH_FRAME (tail
, frame
)
1147 if ((FRAME_TERMCAP_P (XFRAME (frame
))
1148 || FRAME_MSDOS_P (XFRAME (frame
)))
1149 && FRAME_TTY (XFRAME (frame
)) == tty_out
)
1150 FRAME_GARBAGED_P (XFRAME (frame
)) = 1;
1154 tty_out
->term_initted
= 1;
1157 /* Return true if safe to use tabs in output.
1158 At the time this is called, init_sys_modes has not been done yet. */
1161 tabs_safe_p (int fd
)
1163 struct emacs_tty etty
;
1165 emacs_get_tty (fd
, &etty
);
1168 return ((etty
.main
.c_oflag
& TABDLY
) != TAB3
);
1169 #else /* not TABDLY */
1171 #endif /* not TABDLY */
1177 /* Discard echoing. */
1180 suppress_echo_on_tty (int fd
)
1182 struct emacs_tty etty
;
1184 emacs_get_tty (fd
, &etty
);
1186 /* Set raw input mode. */
1189 etty
.main
.c_lflag
&= ~ICANON
; /* Disable buffering */
1190 etty
.main
.c_lflag
&= ~ECHO
; /* Disable echoing */
1191 #endif /* ! WINDOWSNT */
1192 emacs_set_tty (fd
, &etty
, 0);
1195 /* Get terminal size from system.
1196 Store number of lines into *HEIGHTP and width into *WIDTHP.
1197 We store 0 if there's no valid information. */
1200 get_tty_size (int fd
, int *widthp
, int *heightp
)
1202 #if defined TIOCGWINSZ
1205 struct winsize size
;
1207 if (ioctl (fd
, TIOCGWINSZ
, &size
) == -1)
1208 *widthp
= *heightp
= 0;
1211 *widthp
= size
.ws_col
;
1212 *heightp
= size
.ws_row
;
1215 #elif defined TIOCGSIZE
1217 /* SunOS - style. */
1218 struct ttysize size
;
1220 if (ioctl (fd
, TIOCGSIZE
, &size
) == -1)
1221 *widthp
= *heightp
= 0;
1224 *widthp
= size
.ts_cols
;
1225 *heightp
= size
.ts_lines
;
1228 #elif defined WINDOWSNT
1230 CONSOLE_SCREEN_BUFFER_INFO info
;
1231 if (GetConsoleScreenBufferInfo (GetStdHandle (STD_OUTPUT_HANDLE
), &info
))
1233 *widthp
= info
.srWindow
.Right
- info
.srWindow
.Left
+ 1;
1234 *heightp
= info
.srWindow
.Bottom
- info
.srWindow
.Top
+ 1;
1237 *widthp
= *heightp
= 0;
1241 *widthp
= ScreenCols ();
1242 *heightp
= ScreenRows ();
1244 #else /* system doesn't know size */
1252 /* Set the logical window size associated with descriptor FD
1253 to HEIGHT and WIDTH. This is used mainly with ptys.
1254 Return a negative value on failure. */
1257 set_window_size (int fd
, int height
, int width
)
1262 struct winsize size
;
1263 size
.ws_row
= height
;
1264 size
.ws_col
= width
;
1266 return ioctl (fd
, TIOCSWINSZ
, &size
);
1271 /* SunOS - style. */
1272 struct ttysize size
;
1273 size
.ts_lines
= height
;
1274 size
.ts_cols
= width
;
1276 return ioctl (fd
, TIOCGSIZE
, &size
);
1279 #endif /* not SunOS-style */
1280 #endif /* not BSD-style */
1285 /* Prepare all terminal devices for exiting Emacs. */
1288 reset_all_sys_modes (void)
1290 struct tty_display_info
*tty
;
1291 for (tty
= tty_list
; tty
; tty
= tty
->next
)
1292 reset_sys_modes (tty
);
1295 /* Prepare the terminal for closing it; move the cursor to the
1296 bottom of the frame, turn off interrupt-driven I/O, etc. */
1299 reset_sys_modes (struct tty_display_info
*tty_out
)
1306 if (!tty_out
->term_initted
)
1309 if (!tty_out
->output
)
1310 return; /* The tty is suspended. */
1312 /* Go to and clear the last line of the terminal. */
1314 cmgoto (tty_out
, FrameRows (tty_out
) - 1, 0);
1316 /* Code adapted from tty_clear_end_of_line. */
1317 if (tty_out
->TS_clr_line
)
1319 emacs_tputs (tty_out
, tty_out
->TS_clr_line
, 1, cmputc
);
1322 { /* have to do it the hard way */
1324 tty_turn_off_insert (tty_out
);
1326 for (i
= cursorX (tty_out
); i
< FrameCols (tty_out
) - 1; i
++)
1328 fputc (' ', tty_out
->output
);
1332 cmgoto (tty_out
, FrameRows (tty_out
) - 1, 0);
1333 fflush (tty_out
->output
);
1335 if (tty_out
->terminal
->reset_terminal_modes_hook
)
1336 tty_out
->terminal
->reset_terminal_modes_hook (tty_out
->terminal
);
1338 /* Avoid possible loss of output when changing terminal modes. */
1339 while (fdatasync (fileno (tty_out
->output
)) != 0 && errno
== EINTR
)
1344 if (interrupt_input
)
1346 reset_sigio (fileno (tty_out
->input
));
1347 fcntl (fileno (tty_out
->input
), F_SETOWN
,
1348 old_fcntl_owner
[fileno (tty_out
->input
)]);
1350 #endif /* F_SETOWN */
1351 fcntl (fileno (tty_out
->input
), F_SETFL
,
1352 fcntl (fileno (tty_out
->input
), F_GETFL
, 0) & ~O_NONBLOCK
);
1355 if (tty_out
->old_tty
)
1356 while (emacs_set_tty (fileno (tty_out
->input
),
1357 tty_out
->old_tty
, 0) < 0 && errno
== EINTR
)
1360 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */
1364 widen_foreground_group (fileno (tty_out
->input
));
1369 /* Set up the proper status flags for use of a pty. */
1374 /* I'm told that TOICREMOTE does not mean control chars
1375 "can't be sent" but rather that they don't have
1376 input-editing or signaling effects.
1377 That should be good, because we have other ways
1378 to do those things in Emacs.
1379 However, telnet mode seems not to work on 4.2.
1380 So TIOCREMOTE is turned off now. */
1382 /* Under hp-ux, if TIOCREMOTE is turned on, some calls
1383 will hang. In particular, the "timeout" feature (which
1384 causes a read to return if there is no data available)
1385 does this. Also it is known that telnet mode will hang
1386 in such a way that Emacs must be stopped (perhaps this
1387 is the same problem).
1389 If TIOCREMOTE is turned off, then there is a bug in
1390 hp-ux which sometimes loses data. Apparently the
1391 code which blocks the master process when the internal
1392 buffer fills up does not work. Other than this,
1393 though, everything else seems to work fine.
1395 Since the latter lossage is more benign, we may as well
1396 lose that way. -- cph */
1398 #if defined (UNIX98_PTYS)
1401 ioctl (fd
, FIONBIO
, &on
);
1406 #endif /* HAVE_PTYS */
1409 init_system_name (void)
1411 char *hostname_alloc
= NULL
;
1413 #ifndef HAVE_GETHOSTNAME
1416 hostname
= uts
.nodename
;
1417 #else /* HAVE_GETHOSTNAME */
1418 char hostname_buf
[256];
1419 ptrdiff_t hostname_size
= sizeof hostname_buf
;
1420 hostname
= hostname_buf
;
1422 /* Try to get the host name; if the buffer is too short, try
1423 again. Apparently, the only indication gethostname gives of
1424 whether the buffer was large enough is the presence or absence
1425 of a '\0' in the string. Eech. */
1428 gethostname (hostname
, hostname_size
- 1);
1429 hostname
[hostname_size
- 1] = '\0';
1431 /* Was the buffer large enough for the '\0'? */
1432 if (strlen (hostname
) < hostname_size
- 1)
1435 hostname
= hostname_alloc
= xpalloc (hostname_alloc
, &hostname_size
, 1,
1436 min (PTRDIFF_MAX
, SIZE_MAX
), 1);
1438 #endif /* HAVE_GETHOSTNAME */
1440 for (p
= hostname
; *p
; p
++)
1441 if (*p
== ' ' || *p
== '\t')
1443 if (! (STRINGP (Vsystem_name
) && SBYTES (Vsystem_name
) == p
- hostname
1444 && strcmp (SSDATA (Vsystem_name
), hostname
) == 0))
1445 Vsystem_name
= build_string (hostname
);
1446 xfree (hostname_alloc
);
1449 sigset_t empty_mask
;
1451 static struct sigaction process_fatal_action
;
1454 emacs_sigaction_flags (void)
1457 /* SA_RESTART causes interruptible functions with timeouts (e.g.,
1458 'select') to reset their timeout on some platforms (e.g.,
1459 HP-UX 11), which is not what we want. Also, when Emacs is
1460 interactive, we don't want SA_RESTART because we need to poll
1461 for pending input so we need long-running syscalls to be interrupted
1462 after a signal that sets pending_signals.
1464 Non-interactive keyboard input goes through stdio, where we
1465 always want restartable system calls. */
1472 /* Store into *ACTION a signal action suitable for Emacs, with handler
1475 emacs_sigaction_init (struct sigaction
*action
, signal_handler_t handler
)
1477 sigemptyset (&action
->sa_mask
);
1479 /* When handling a signal, block nonfatal system signals that are caught
1480 by Emacs. This makes race conditions less likely. */
1481 sigaddset (&action
->sa_mask
, SIGALRM
);
1483 sigaddset (&action
->sa_mask
, SIGCHLD
);
1486 sigaddset (&action
->sa_mask
, SIGDANGER
);
1488 #ifdef PROFILER_CPU_SUPPORT
1489 sigaddset (&action
->sa_mask
, SIGPROF
);
1492 sigaddset (&action
->sa_mask
, SIGWINCH
);
1494 if (! noninteractive
)
1496 sigaddset (&action
->sa_mask
, SIGINT
);
1497 sigaddset (&action
->sa_mask
, SIGQUIT
);
1499 sigaddset (&action
->sa_mask
, SIGIO
);
1503 action
->sa_handler
= handler
;
1504 action
->sa_flags
= emacs_sigaction_flags ();
1507 #ifdef FORWARD_SIGNAL_TO_MAIN_THREAD
1508 static pthread_t main_thread
;
1511 /* SIG has arrived at the current process. Deliver it to the main
1512 thread, which should handle it with HANDLER.
1514 If we are on the main thread, handle the signal SIG with HANDLER.
1515 Otherwise, redirect the signal to the main thread, blocking it from
1516 this thread. POSIX says any thread can receive a signal that is
1517 associated with a process, process group, or asynchronous event.
1518 On GNU/Linux that is not true, but for other systems (FreeBSD at
1521 deliver_process_signal (int sig
, signal_handler_t handler
)
1523 /* Preserve errno, to avoid race conditions with signal handlers that
1524 might change errno. Races can occur even in single-threaded hosts. */
1525 int old_errno
= errno
;
1527 bool on_main_thread
= true;
1528 #ifdef FORWARD_SIGNAL_TO_MAIN_THREAD
1529 if (! pthread_equal (pthread_self (), main_thread
))
1532 sigemptyset (&blocked
);
1533 sigaddset (&blocked
, sig
);
1534 pthread_sigmask (SIG_BLOCK
, &blocked
, 0);
1535 pthread_kill (main_thread
, sig
);
1536 on_main_thread
= false;
1545 /* Static location to save a fatal backtrace in a thread.
1546 FIXME: If two subsidiary threads fail simultaneously, the resulting
1547 backtrace may be garbage. */
1548 enum { BACKTRACE_LIMIT_MAX
= 500 };
1549 static void *thread_backtrace_buffer
[BACKTRACE_LIMIT_MAX
+ 1];
1550 static int thread_backtrace_npointers
;
1552 /* SIG has arrived at the current thread.
1553 If we are on the main thread, handle the signal SIG with HANDLER.
1554 Otherwise, this is a fatal error in the handling thread. */
1556 deliver_thread_signal (int sig
, signal_handler_t handler
)
1558 int old_errno
= errno
;
1560 #ifdef FORWARD_SIGNAL_TO_MAIN_THREAD
1561 if (! pthread_equal (pthread_self (), main_thread
))
1563 thread_backtrace_npointers
1564 = backtrace (thread_backtrace_buffer
, BACKTRACE_LIMIT_MAX
);
1565 sigaction (sig
, &process_fatal_action
, 0);
1566 pthread_kill (main_thread
, sig
);
1568 /* Avoid further damage while the main thread is exiting. */
1570 sigsuspend (&empty_mask
);
1578 #if !HAVE_DECL_SYS_SIGLIST
1580 # ifdef _sys_siglist
1581 # define sys_siglist _sys_siglist
1582 # elif HAVE_DECL___SYS_SIGLIST
1583 # define sys_siglist __sys_siglist
1585 # define sys_siglist my_sys_siglist
1586 static char const *sys_siglist
[NSIG
];
1591 # define sys_siglist_entries _sys_nsig
1593 # define sys_siglist_entries NSIG
1596 /* Handle bus errors, invalid instruction, etc. */
1598 handle_fatal_signal (int sig
)
1600 terminate_due_to_signal (sig
, 40);
1604 deliver_fatal_signal (int sig
)
1606 deliver_process_signal (sig
, handle_fatal_signal
);
1610 deliver_fatal_thread_signal (int sig
)
1612 deliver_thread_signal (sig
, handle_fatal_signal
);
1615 static _Noreturn
void
1616 handle_arith_signal (int sig
)
1618 pthread_sigmask (SIG_SETMASK
, &empty_mask
, 0);
1619 xsignal0 (Qarith_error
);
1622 #if defined HAVE_STACK_OVERFLOW_HANDLING && !defined WINDOWSNT
1624 /* Alternate stack used by SIGSEGV handler below. */
1626 static unsigned char sigsegv_stack
[SIGSTKSZ
];
1629 /* Return true if SIGINFO indicates a stack overflow. */
1632 stack_overflow (siginfo_t
*siginfo
)
1634 if (!attempt_stack_overflow_recovery
)
1637 /* In theory, a more-accurate heuristic can be obtained by using
1638 GNU/Linux pthread_getattr_np along with POSIX pthread_attr_getstack
1639 and pthread_attr_getguardsize to find the location and size of the
1640 guard area. In practice, though, these functions are so hard to
1641 use reliably that they're not worth bothering with. E.g., see:
1642 https://sourceware.org/bugzilla/show_bug.cgi?id=16291
1643 Other operating systems also have problems, e.g., Solaris's
1644 stack_violation function is tailor-made for this problem, but it
1645 doesn't work on Solaris 11.2 x86-64 with a 32-bit executable.
1647 GNU libsigsegv is overkill for Emacs; otherwise it might be a
1653 /* The faulting address. */
1654 char *addr
= siginfo
->si_addr
;
1658 /* The known top and bottom of the stack. The actual stack may
1659 extend a bit beyond these boundaries. */
1660 char *bot
= stack_bottom
;
1661 char *top
= near_C_stack_top ();
1663 /* Log base 2 of the stack heuristic ratio. This ratio is the size
1664 of the known stack divided by the size of the guard area past the
1665 end of the stack top. The heuristic is that a bad address is
1666 considered to be a stack overflow if it occurs within
1667 stacksize>>LG_STACK_HEURISTIC bytes above the top of the known
1668 stack. This heuristic is not exactly correct but it's good
1669 enough in practice. */
1670 enum { LG_STACK_HEURISTIC
= 8 };
1673 return 0 <= addr
- top
&& addr
- top
< (top
- bot
) >> LG_STACK_HEURISTIC
;
1675 return 0 <= top
- addr
&& top
- addr
< (bot
- top
) >> LG_STACK_HEURISTIC
;
1679 /* Attempt to recover from SIGSEGV caused by C stack overflow. */
1682 handle_sigsegv (int sig
, siginfo_t
*siginfo
, void *arg
)
1684 /* Hard GC error may lead to stack overflow caused by
1685 too nested calls to mark_object. No way to survive. */
1686 bool fatal
= gc_in_progress
;
1688 #ifdef FORWARD_SIGNAL_TO_MAIN_THREAD
1689 if (!fatal
&& !pthread_equal (pthread_self (), main_thread
))
1693 if (!fatal
&& stack_overflow (siginfo
))
1694 siglongjmp (return_to_command_loop
, 1);
1696 /* Otherwise we can't do anything with this. */
1697 deliver_fatal_thread_signal (sig
);
1700 /* Return true if we have successfully set up SIGSEGV handler on alternate
1701 stack. Otherwise we just treat SIGSEGV among the rest of fatal signals. */
1706 struct sigaction sa
;
1709 ss
.ss_sp
= sigsegv_stack
;
1710 ss
.ss_size
= sizeof (sigsegv_stack
);
1712 if (sigaltstack (&ss
, NULL
) < 0)
1715 sigfillset (&sa
.sa_mask
);
1716 sa
.sa_sigaction
= handle_sigsegv
;
1717 sa
.sa_flags
= SA_SIGINFO
| SA_ONSTACK
| emacs_sigaction_flags ();
1718 return sigaction (SIGSEGV
, &sa
, NULL
) < 0 ? 0 : 1;
1721 #else /* not HAVE_STACK_OVERFLOW_HANDLING or WINDOWSNT */
1729 #endif /* HAVE_STACK_OVERFLOW_HANDLING && !WINDOWSNT */
1732 deliver_arith_signal (int sig
)
1734 deliver_thread_signal (sig
, handle_arith_signal
);
1739 /* Handler for SIGDANGER. */
1741 handle_danger_signal (int sig
)
1743 malloc_warning ("Operating system warns that virtual memory is running low.\n");
1745 /* It might be unsafe to call do_auto_save now. */
1746 force_auto_save_soon ();
1750 deliver_danger_signal (int sig
)
1752 deliver_process_signal (sig
, handle_danger_signal
);
1756 /* Treat SIG as a terminating signal, unless it is already ignored and
1757 we are in --batch mode. Among other things, this makes nohup work. */
1759 maybe_fatal_sig (int sig
)
1761 bool catch_sig
= !noninteractive
;
1764 struct sigaction old_action
;
1765 sigaction (sig
, 0, &old_action
);
1766 catch_sig
= old_action
.sa_handler
!= SIG_IGN
;
1769 sigaction (sig
, &process_fatal_action
, 0);
1773 init_signals (bool dumping
)
1775 struct sigaction thread_fatal_action
;
1776 struct sigaction action
;
1778 sigemptyset (&empty_mask
);
1780 #ifdef FORWARD_SIGNAL_TO_MAIN_THREAD
1781 main_thread
= pthread_self ();
1784 #if !HAVE_DECL_SYS_SIGLIST && !defined _sys_siglist
1787 sys_siglist
[SIGABRT
] = "Aborted";
1789 sys_siglist
[SIGAIO
] = "LAN I/O interrupt";
1791 sys_siglist
[SIGALRM
] = "Alarm clock";
1793 sys_siglist
[SIGBUS
] = "Bus error";
1796 sys_siglist
[SIGCHLD
] = "Child status changed";
1799 sys_siglist
[SIGCONT
] = "Continued";
1802 sys_siglist
[SIGDANGER
] = "Swap space dangerously low";
1805 sys_siglist
[SIGDGNOTIFY
] = "Notification message in queue";
1808 sys_siglist
[SIGEMT
] = "Emulation trap";
1810 sys_siglist
[SIGFPE
] = "Arithmetic exception";
1812 sys_siglist
[SIGFREEZE
] = "SIGFREEZE";
1815 sys_siglist
[SIGGRANT
] = "Monitor mode granted";
1817 sys_siglist
[SIGHUP
] = "Hangup";
1818 sys_siglist
[SIGILL
] = "Illegal instruction";
1819 sys_siglist
[SIGINT
] = "Interrupt";
1821 sys_siglist
[SIGIO
] = "I/O possible";
1824 sys_siglist
[SIGIOINT
] = "I/O intervention required";
1827 sys_siglist
[SIGIOT
] = "IOT trap";
1829 sys_siglist
[SIGKILL
] = "Killed";
1831 sys_siglist
[SIGLOST
] = "Resource lost";
1834 sys_siglist
[SIGLWP
] = "SIGLWP";
1837 sys_siglist
[SIGMSG
] = "Monitor mode data available";
1840 sys_siglist
[SIGWIND
] = "SIGPHONE";
1842 sys_siglist
[SIGPIPE
] = "Broken pipe";
1844 sys_siglist
[SIGPOLL
] = "Pollable event occurred";
1847 sys_siglist
[SIGPROF
] = "Profiling timer expired";
1850 sys_siglist
[SIGPTY
] = "PTY I/O interrupt";
1853 sys_siglist
[SIGPWR
] = "Power-fail restart";
1855 sys_siglist
[SIGQUIT
] = "Quit";
1857 sys_siglist
[SIGRETRACT
] = "Need to relinquish monitor mode";
1860 sys_siglist
[SIGSAK
] = "Secure attention";
1862 sys_siglist
[SIGSEGV
] = "Segmentation violation";
1864 sys_siglist
[SIGSOUND
] = "Sound completed";
1867 sys_siglist
[SIGSTOP
] = "Stopped (signal)";
1870 sys_siglist
[SIGSTP
] = "Stopped (user)";
1873 sys_siglist
[SIGSYS
] = "Bad argument to system call";
1875 sys_siglist
[SIGTERM
] = "Terminated";
1877 sys_siglist
[SIGTHAW
] = "SIGTHAW";
1880 sys_siglist
[SIGTRAP
] = "Trace/breakpoint trap";
1883 sys_siglist
[SIGTSTP
] = "Stopped (user)";
1886 sys_siglist
[SIGTTIN
] = "Stopped (tty input)";
1889 sys_siglist
[SIGTTOU
] = "Stopped (tty output)";
1892 sys_siglist
[SIGURG
] = "Urgent I/O condition";
1895 sys_siglist
[SIGUSR1
] = "User defined signal 1";
1898 sys_siglist
[SIGUSR2
] = "User defined signal 2";
1901 sys_siglist
[SIGVTALRM
] = "Virtual timer expired";
1904 sys_siglist
[SIGWAITING
] = "Process's LWPs are blocked";
1907 sys_siglist
[SIGWINCH
] = "Window size changed";
1910 sys_siglist
[SIGWIND
] = "SIGWIND";
1913 sys_siglist
[SIGXCPU
] = "CPU time limit exceeded";
1916 sys_siglist
[SIGXFSZ
] = "File size limit exceeded";
1919 #endif /* !HAVE_DECL_SYS_SIGLIST && !_sys_siglist */
1921 /* Don't alter signal handlers if dumping. On some machines,
1922 changing signal handlers sets static data that would make signals
1923 fail to work right when the dumped Emacs is run. */
1927 sigfillset (&process_fatal_action
.sa_mask
);
1928 process_fatal_action
.sa_handler
= deliver_fatal_signal
;
1929 process_fatal_action
.sa_flags
= emacs_sigaction_flags ();
1931 sigfillset (&thread_fatal_action
.sa_mask
);
1932 thread_fatal_action
.sa_handler
= deliver_fatal_thread_signal
;
1933 thread_fatal_action
.sa_flags
= process_fatal_action
.sa_flags
;
1935 /* SIGINT may need special treatment on MS-Windows. See
1936 http://lists.gnu.org/archive/html/emacs-devel/2010-09/msg01062.html
1937 Please update the doc of kill-emacs, kill-emacs-hook, and
1938 NEWS if you change this. */
1940 maybe_fatal_sig (SIGHUP
);
1941 maybe_fatal_sig (SIGINT
);
1942 maybe_fatal_sig (SIGTERM
);
1944 /* Emacs checks for write errors, so it can safely ignore SIGPIPE.
1945 However, in batch mode leave SIGPIPE alone, as that causes Emacs
1946 to behave more like typical batch applications do. */
1947 if (! noninteractive
)
1948 signal (SIGPIPE
, SIG_IGN
);
1950 sigaction (SIGQUIT
, &process_fatal_action
, 0);
1951 sigaction (SIGILL
, &thread_fatal_action
, 0);
1952 sigaction (SIGTRAP
, &thread_fatal_action
, 0);
1954 /* Typically SIGFPE is thread-specific and is fatal, like SIGILL.
1955 But on a non-IEEE host SIGFPE can come from a trap in the Lisp
1956 interpreter's floating point operations, so treat SIGFPE as an
1957 arith-error if it arises in the main thread. */
1958 if (IEEE_FLOATING_POINT
)
1959 sigaction (SIGFPE
, &thread_fatal_action
, 0);
1962 emacs_sigaction_init (&action
, deliver_arith_signal
);
1963 sigaction (SIGFPE
, &action
, 0);
1967 add_user_signal (SIGUSR1
, "sigusr1");
1970 add_user_signal (SIGUSR2
, "sigusr2");
1972 sigaction (SIGABRT
, &thread_fatal_action
, 0);
1974 sigaction (SIGPRE
, &thread_fatal_action
, 0);
1977 sigaction (SIGORE
, &thread_fatal_action
, 0);
1980 sigaction (SIGUME
, &thread_fatal_action
, 0);
1983 sigaction (SIGDLK
, &process_fatal_action
, 0);
1986 sigaction (SIGCPULIM
, &process_fatal_action
, 0);
1989 sigaction (SIGIOT
, &thread_fatal_action
, 0);
1992 sigaction (SIGEMT
, &thread_fatal_action
, 0);
1995 sigaction (SIGBUS
, &thread_fatal_action
, 0);
1997 if (!init_sigsegv ())
1998 sigaction (SIGSEGV
, &thread_fatal_action
, 0);
2000 sigaction (SIGSYS
, &thread_fatal_action
, 0);
2002 sigaction (SIGTERM
, &process_fatal_action
, 0);
2004 signal (SIGPROF
, SIG_IGN
);
2007 sigaction (SIGVTALRM
, &process_fatal_action
, 0);
2010 sigaction (SIGXCPU
, &process_fatal_action
, 0);
2013 sigaction (SIGXFSZ
, &process_fatal_action
, 0);
2017 /* This just means available memory is getting low. */
2018 emacs_sigaction_init (&action
, deliver_danger_signal
);
2019 sigaction (SIGDANGER
, &action
, 0);
2022 /* AIX-specific signals. */
2024 sigaction (SIGGRANT
, &process_fatal_action
, 0);
2027 sigaction (SIGMIGRATE
, &process_fatal_action
, 0);
2030 sigaction (SIGMSG
, &process_fatal_action
, 0);
2033 sigaction (SIGRETRACT
, &process_fatal_action
, 0);
2036 sigaction (SIGSAK
, &process_fatal_action
, 0);
2039 sigaction (SIGSOUND
, &process_fatal_action
, 0);
2042 sigaction (SIGTALRM
, &thread_fatal_action
, 0);
2052 /* Figure out how many bits the system's random number generator uses.
2053 `random' and `lrand48' are assumed to return 31 usable bits.
2054 BSD `rand' returns a 31 bit value but the low order bits are unusable;
2055 so we'll shift it and treat it like the 15-bit USG `rand'. */
2059 # define RAND_BITS 31
2060 # else /* !HAVE_RANDOM */
2061 # ifdef HAVE_LRAND48
2062 # define RAND_BITS 31
2063 # define random lrand48
2064 # else /* !HAVE_LRAND48 */
2065 # define RAND_BITS 15
2066 # if RAND_MAX == 32767
2067 # define random rand
2068 # else /* RAND_MAX != 32767 */
2069 # if RAND_MAX == 2147483647
2070 # define random() (rand () >> 16)
2071 # else /* RAND_MAX != 2147483647 */
2073 # define random rand
2075 # define random() (rand () >> 16)
2077 # endif /* RAND_MAX != 2147483647 */
2078 # endif /* RAND_MAX != 32767 */
2079 # endif /* !HAVE_LRAND48 */
2080 # endif /* !HAVE_RANDOM */
2081 #endif /* !RAND_BITS */
2084 typedef unsigned int random_seed
;
2085 static void set_random_seed (random_seed arg
) { srandom (arg
); }
2086 #elif defined HAVE_LRAND48
2087 /* Although srand48 uses a long seed, this is unsigned long to avoid
2088 undefined behavior on signed integer overflow in init_random. */
2089 typedef unsigned long int random_seed
;
2090 static void set_random_seed (random_seed arg
) { srand48 (arg
); }
2092 typedef unsigned int random_seed
;
2093 static void set_random_seed (random_seed arg
) { srand (arg
); }
2097 seed_random (void *seed
, ptrdiff_t seed_size
)
2099 random_seed arg
= 0;
2100 unsigned char *argp
= (unsigned char *) &arg
;
2101 unsigned char *seedp
= seed
;
2102 for (ptrdiff_t i
= 0; i
< seed_size
; i
++)
2103 argp
[i
% sizeof arg
] ^= seedp
[i
];
2104 set_random_seed (arg
);
2111 if (! (EQ (emacs_gnutls_global_init (), Qt
)
2112 && gnutls_rnd (GNUTLS_RND_NONCE
, &v
, sizeof v
) == 0))
2114 bool success
= false;
2116 int fd
= emacs_open ("/dev/urandom", O_RDONLY
| O_BINARY
, 0);
2119 success
= emacs_read (fd
, &v
, sizeof v
) == sizeof v
;
2123 success
= w32_init_random (&v
, sizeof v
) == 0;
2127 /* Fall back to current time value + PID. */
2128 struct timespec t
= current_timespec ();
2129 v
= getpid () ^ t
.tv_sec
^ t
.tv_nsec
;
2132 set_random_seed (v
);
2136 * Return a nonnegative random integer out of whatever we've got.
2137 * It contains enough bits to make a random (signed) Emacs fixnum.
2138 * This suffices even for a 64-bit architecture with a 15-bit rand.
2145 for (i
= 0; i
< (FIXNUM_BITS
+ RAND_BITS
- 1) / RAND_BITS
; i
++)
2146 val
= (random () ^ (val
<< RAND_BITS
)
2147 ^ (val
>> (BITS_PER_EMACS_INT
- RAND_BITS
)));
2148 val
^= val
>> (BITS_PER_EMACS_INT
- FIXNUM_BITS
);
2149 return val
& INTMASK
;
2152 #ifndef HAVE_SNPRINTF
2153 /* Approximate snprintf as best we can on ancient hosts that lack it. */
2155 snprintf (char *buf
, size_t bufsize
, char const *format
, ...)
2157 ptrdiff_t size
= min (bufsize
, PTRDIFF_MAX
);
2158 ptrdiff_t nbytes
= size
- 1;
2163 va_start (ap
, format
);
2164 nbytes
= doprnt (buf
, size
, format
, 0, ap
);
2168 if (nbytes
== size
- 1)
2170 /* Calculate the length of the string that would have been created
2171 had the buffer been large enough. */
2172 char stackbuf
[4000];
2174 ptrdiff_t bsize
= sizeof stackbuf
;
2175 va_start (ap
, format
);
2176 nbytes
= evxprintf (&b
, &bsize
, stackbuf
, -1, format
, ap
);
2182 if (INT_MAX
< nbytes
)
2195 /* If a backtrace is available, output the top lines of it to stderr.
2196 Do not output more than BACKTRACE_LIMIT or BACKTRACE_LIMIT_MAX lines.
2197 This function may be called from a signal handler, so it should
2198 not invoke async-unsafe functions like malloc.
2200 If BACKTRACE_LIMIT is -1, initialize tables that 'backtrace' uses
2201 but do not output anything. This avoids some problems that can
2202 otherwise occur if the malloc arena is corrupted before 'backtrace'
2203 is called, since 'backtrace' may call malloc if the tables are not
2206 If the static variable THREAD_BACKTRACE_NPOINTERS is nonzero, a
2207 fatal error has occurred in some other thread; generate a thread
2208 backtrace instead, ignoring BACKTRACE_LIMIT. */
2210 emacs_backtrace (int backtrace_limit
)
2212 void *main_backtrace_buffer
[BACKTRACE_LIMIT_MAX
+ 1];
2213 int bounded_limit
= min (backtrace_limit
, BACKTRACE_LIMIT_MAX
);
2217 if (thread_backtrace_npointers
)
2219 buffer
= thread_backtrace_buffer
;
2220 npointers
= thread_backtrace_npointers
;
2224 buffer
= main_backtrace_buffer
;
2226 /* Work around 'backtrace' bug; see Bug#19959 and glibc bug#18084. */
2227 if (bounded_limit
< 0)
2229 backtrace (buffer
, 1);
2233 npointers
= backtrace (buffer
, bounded_limit
+ 1);
2238 emacs_write (STDERR_FILENO
, "\nBacktrace:\n", 12);
2239 backtrace_symbols_fd (buffer
, npointers
, STDERR_FILENO
);
2240 if (bounded_limit
< npointers
)
2241 emacs_write (STDERR_FILENO
, "...\n", 4);
2249 terminate_due_to_signal (SIGABRT
, 40);
2253 /* Open FILE for Emacs use, using open flags OFLAG and mode MODE.
2254 Use binary I/O on systems that care about text vs binary I/O.
2255 Arrange for subprograms to not inherit the file descriptor.
2256 Prefer a method that is multithread-safe, if available.
2257 Do not fail merely because the open was interrupted by a signal.
2258 Allow the user to quit. */
2261 emacs_open (const char *file
, int oflags
, int mode
)
2264 if (! (oflags
& O_TEXT
))
2266 oflags
|= O_CLOEXEC
;
2267 while ((fd
= open (file
, oflags
, mode
)) < 0 && errno
== EINTR
)
2269 if (! O_CLOEXEC
&& 0 <= fd
)
2270 fcntl (fd
, F_SETFD
, FD_CLOEXEC
);
2274 /* Open FILE as a stream for Emacs use, with mode MODE.
2275 Act like emacs_open with respect to threads, signals, and quits. */
2278 emacs_fopen (char const *file
, char const *mode
)
2280 int fd
, omode
, oflags
;
2282 char const *m
= mode
;
2286 case 'r': omode
= O_RDONLY
; oflags
= 0; break;
2287 case 'w': omode
= O_WRONLY
; oflags
= O_CREAT
| O_TRUNC
; break;
2288 case 'a': omode
= O_WRONLY
; oflags
= O_CREAT
| O_APPEND
; break;
2289 default: emacs_abort ();
2295 case '+': omode
= O_RDWR
; break;
2296 case 'b': bflag
= O_BINARY
; break;
2297 case 't': bflag
= O_TEXT
; break;
2298 default: /* Ignore. */ break;
2301 fd
= emacs_open (file
, omode
| oflags
| bflag
, 0666);
2302 return fd
< 0 ? 0 : fdopen (fd
, mode
);
2305 /* Create a pipe for Emacs use. */
2308 emacs_pipe (int fd
[2])
2313 int result
= pipe2 (fd
, O_BINARY
| O_CLOEXEC
);
2314 if (! O_CLOEXEC
&& result
== 0)
2316 fcntl (fd
[0], F_SETFD
, FD_CLOEXEC
);
2317 fcntl (fd
[1], F_SETFD
, FD_CLOEXEC
);
2323 /* Approximate posix_close and POSIX_CLOSE_RESTART well enough for Emacs.
2324 For the background behind this mess, please see Austin Group defect 529
2325 <http://austingroupbugs.net/view.php?id=529>. */
2327 #ifndef POSIX_CLOSE_RESTART
2328 # define POSIX_CLOSE_RESTART 1
2330 posix_close (int fd
, int flag
)
2332 /* Only the POSIX_CLOSE_RESTART case is emulated. */
2333 eassert (flag
== POSIX_CLOSE_RESTART
);
2335 /* Things are tricky if close (fd) returns -1 with errno == EINTR
2336 on a system that does not define POSIX_CLOSE_RESTART.
2338 In this case, in some systems (e.g., GNU/Linux, AIX) FD is
2339 closed, and retrying the close could inadvertently close a file
2340 descriptor allocated by some other thread. In other systems
2341 (e.g., HP/UX) FD is not closed. And in still other systems
2342 (e.g., OS X, Solaris), maybe FD is closed, maybe not, and in a
2343 multithreaded program there can be no way to tell.
2345 So, in this case, pretend that the close succeeded. This works
2346 well on systems like GNU/Linux that close FD. Although it may
2347 leak a file descriptor on other systems, the leak is unlikely and
2348 it's better to leak than to close a random victim. */
2349 return close (fd
) == 0 || errno
== EINTR
? 0 : -1;
2353 /* Close FD, retrying if interrupted. If successful, return 0;
2354 otherwise, return -1 and set errno to a non-EINTR value. Consider
2355 an EINPROGRESS error to be successful, as that's merely a signal
2356 arriving. FD is always closed when this function returns, even
2359 Do not call this function if FD is nonnegative and might already be closed,
2360 as that might close an innocent victim opened by some other thread. */
2363 emacs_close (int fd
)
2367 int r
= posix_close (fd
, POSIX_CLOSE_RESTART
);
2370 if (!POSIX_CLOSE_RESTART
|| errno
!= EINTR
)
2372 eassert (errno
!= EBADF
|| fd
< 0);
2373 return errno
== EINPROGRESS
? 0 : r
;
2378 /* Maximum number of bytes to read or write in a single system call.
2379 This works around a serious bug in Linux kernels before 2.6.16; see
2380 <https://bugzilla.redhat.com/show_bug.cgi?format=multiple&id=612839>.
2381 It's likely to work around similar bugs in other operating systems, so do it
2382 on all platforms. Round INT_MAX down to a page size, with the conservative
2383 assumption that page sizes are at most 2**18 bytes (any kernel with a
2384 page size larger than that shouldn't have the bug). */
2385 #ifndef MAX_RW_COUNT
2386 #define MAX_RW_COUNT (INT_MAX >> 18 << 18)
2389 /* Read from FILEDESC to a buffer BUF with size NBYTE, retrying if interrupted.
2390 Return the number of bytes read, which might be less than NBYTE.
2391 On error, set errno and return -1. */
2393 emacs_read (int fildes
, void *buf
, ptrdiff_t nbyte
)
2397 /* There is no need to check against MAX_RW_COUNT, since no caller ever
2398 passes a size that large to emacs_read. */
2400 while ((rtnval
= read (fildes
, buf
, nbyte
)) == -1
2401 && (errno
== EINTR
))
2406 /* Write to FILEDES from a buffer BUF with size NBYTE, retrying if interrupted
2407 or if a partial write occurs. If interrupted, process pending
2408 signals if PROCESS SIGNALS. Return the number of bytes written, setting
2409 errno if this is less than NBYTE. */
2411 emacs_full_write (int fildes
, char const *buf
, ptrdiff_t nbyte
,
2412 bool process_signals
)
2414 ptrdiff_t bytes_written
= 0;
2418 ssize_t n
= write (fildes
, buf
, min (nbyte
, MAX_RW_COUNT
));
2424 /* I originally used `QUIT' but that might cause files to
2425 be truncated if you hit C-g in the middle of it. --Stef */
2426 if (process_signals
&& pending_signals
)
2427 process_pending_signals ();
2439 return bytes_written
;
2442 /* Write to FILEDES from a buffer BUF with size NBYTE, retrying if
2443 interrupted or if a partial write occurs. Return the number of
2444 bytes written, setting errno if this is less than NBYTE. */
2446 emacs_write (int fildes
, void const *buf
, ptrdiff_t nbyte
)
2448 return emacs_full_write (fildes
, buf
, nbyte
, 0);
2451 /* Like emacs_write, but also process pending signals if interrupted. */
2453 emacs_write_sig (int fildes
, void const *buf
, ptrdiff_t nbyte
)
2455 return emacs_full_write (fildes
, buf
, nbyte
, 1);
2458 /* Write a diagnostic to standard error that contains MESSAGE and a
2459 string derived from errno. Preserve errno. Do not buffer stderr.
2460 Do not process pending signals if interrupted. */
2462 emacs_perror (char const *message
)
2465 char const *error_string
= strerror (err
);
2466 char const *command
= (initial_argv
&& initial_argv
[0]
2467 ? initial_argv
[0] : "emacs");
2468 /* Write it out all at once, if it's short; this is less likely to
2469 be interleaved with other output. */
2471 int nbytes
= snprintf (buf
, sizeof buf
, "%s: %s: %s\n",
2472 command
, message
, error_string
);
2473 if (0 <= nbytes
&& nbytes
< BUFSIZ
)
2474 emacs_write (STDERR_FILENO
, buf
, nbytes
);
2477 emacs_write (STDERR_FILENO
, command
, strlen (command
));
2478 emacs_write (STDERR_FILENO
, ": ", 2);
2479 emacs_write (STDERR_FILENO
, message
, strlen (message
));
2480 emacs_write (STDERR_FILENO
, ": ", 2);
2481 emacs_write (STDERR_FILENO
, error_string
, strlen (error_string
));
2482 emacs_write (STDERR_FILENO
, "\n", 1);
2487 /* Return a struct timeval that is roughly equivalent to T.
2488 Use the least timeval not less than T.
2489 Return an extremal value if the result would overflow. */
2491 make_timeval (struct timespec t
)
2494 tv
.tv_sec
= t
.tv_sec
;
2495 tv
.tv_usec
= t
.tv_nsec
/ 1000;
2497 if (t
.tv_nsec
% 1000 != 0)
2499 if (tv
.tv_usec
< 999999)
2501 else if (tv
.tv_sec
< TYPE_MAXIMUM (time_t))
2511 /* Set the access and modification time stamps of FD (a.k.a. FILE) to be
2512 ATIME and MTIME, respectively.
2513 FD must be either negative -- in which case it is ignored --
2514 or a file descriptor that is open on FILE.
2515 If FD is nonnegative, then FILE can be NULL. */
2517 set_file_times (int fd
, const char *filename
,
2518 struct timespec atime
, struct timespec mtime
)
2520 struct timespec timespec
[2];
2521 timespec
[0] = atime
;
2522 timespec
[1] = mtime
;
2523 return fdutimens (fd
, filename
, timespec
);
2526 /* Like strsignal, except async-signal-safe, and this function typically
2527 returns a string in the C locale rather than the current locale. */
2529 safe_strsignal (int code
)
2531 char const *signame
= 0;
2533 if (0 <= code
&& code
< sys_siglist_entries
)
2534 signame
= sys_siglist
[code
];
2536 signame
= "Unknown signal";
2542 /* For make-serial-process */
2544 serial_open (Lisp_Object port
)
2546 int fd
= emacs_open (SSDATA (port
), O_RDWR
| O_NOCTTY
| O_NONBLOCK
, 0);
2548 report_file_error ("Opening serial port", port
);
2550 ioctl (fd
, TIOCEXCL
, (char *) 0);
2556 #if !defined (HAVE_CFMAKERAW)
2557 /* Workaround for targets which are missing cfmakeraw. */
2558 /* Pasted from man page. */
2560 cfmakeraw (struct termios
*termios_p
)
2562 termios_p
->c_iflag
&= ~(IGNBRK
|BRKINT
|PARMRK
|ISTRIP
|INLCR
|IGNCR
|ICRNL
|IXON
);
2563 termios_p
->c_oflag
&= ~OPOST
;
2564 termios_p
->c_lflag
&= ~(ECHO
|ECHONL
|ICANON
|ISIG
|IEXTEN
);
2565 termios_p
->c_cflag
&= ~(CSIZE
|PARENB
);
2566 termios_p
->c_cflag
|= CS8
;
2568 #endif /* !defined (HAVE_CFMAKERAW */
2570 #if !defined (HAVE_CFSETSPEED)
2571 /* Workaround for targets which are missing cfsetspeed. */
2573 cfsetspeed (struct termios
*termios_p
, speed_t vitesse
)
2575 return (cfsetispeed (termios_p
, vitesse
)
2576 + cfsetospeed (termios_p
, vitesse
));
2580 /* For serial-process-configure */
2582 serial_configure (struct Lisp_Process
*p
,
2583 Lisp_Object contact
)
2585 Lisp_Object childp2
= Qnil
;
2586 Lisp_Object tem
= Qnil
;
2587 struct termios attr
;
2589 char summary
[4] = "???"; /* This usually becomes "8N1". */
2591 childp2
= Fcopy_sequence (p
->childp
);
2593 /* Read port attributes and prepare default configuration. */
2594 err
= tcgetattr (p
->outfd
, &attr
);
2596 report_file_error ("Failed tcgetattr", Qnil
);
2598 #if defined (CLOCAL)
2599 attr
.c_cflag
|= CLOCAL
;
2602 attr
.c_cflag
|= CREAD
;
2605 /* Configure speed. */
2606 if (!NILP (Fplist_member (contact
, QCspeed
)))
2607 tem
= Fplist_get (contact
, QCspeed
);
2609 tem
= Fplist_get (p
->childp
, QCspeed
);
2611 err
= cfsetspeed (&attr
, XINT (tem
));
2613 report_file_error ("Failed cfsetspeed", tem
);
2614 childp2
= Fplist_put (childp2
, QCspeed
, tem
);
2616 /* Configure bytesize. */
2617 if (!NILP (Fplist_member (contact
, QCbytesize
)))
2618 tem
= Fplist_get (contact
, QCbytesize
);
2620 tem
= Fplist_get (p
->childp
, QCbytesize
);
2622 tem
= make_number (8);
2624 if (XINT (tem
) != 7 && XINT (tem
) != 8)
2625 error (":bytesize must be nil (8), 7, or 8");
2626 summary
[0] = XINT (tem
) + '0';
2627 #if defined (CSIZE) && defined (CS7) && defined (CS8)
2628 attr
.c_cflag
&= ~CSIZE
;
2629 attr
.c_cflag
|= ((XINT (tem
) == 7) ? CS7
: CS8
);
2631 /* Don't error on bytesize 8, which should be set by cfmakeraw. */
2632 if (XINT (tem
) != 8)
2633 error ("Bytesize cannot be changed");
2635 childp2
= Fplist_put (childp2
, QCbytesize
, tem
);
2637 /* Configure parity. */
2638 if (!NILP (Fplist_member (contact
, QCparity
)))
2639 tem
= Fplist_get (contact
, QCparity
);
2641 tem
= Fplist_get (p
->childp
, QCparity
);
2642 if (!NILP (tem
) && !EQ (tem
, Qeven
) && !EQ (tem
, Qodd
))
2643 error (":parity must be nil (no parity), `even', or `odd'");
2644 #if defined (PARENB) && defined (PARODD) && defined (IGNPAR) && defined (INPCK)
2645 attr
.c_cflag
&= ~(PARENB
| PARODD
);
2646 attr
.c_iflag
&= ~(IGNPAR
| INPCK
);
2651 else if (EQ (tem
, Qeven
))
2654 attr
.c_cflag
|= PARENB
;
2655 attr
.c_iflag
|= (IGNPAR
| INPCK
);
2657 else if (EQ (tem
, Qodd
))
2660 attr
.c_cflag
|= (PARENB
| PARODD
);
2661 attr
.c_iflag
|= (IGNPAR
| INPCK
);
2664 /* Don't error on no parity, which should be set by cfmakeraw. */
2666 error ("Parity cannot be configured");
2668 childp2
= Fplist_put (childp2
, QCparity
, tem
);
2670 /* Configure stopbits. */
2671 if (!NILP (Fplist_member (contact
, QCstopbits
)))
2672 tem
= Fplist_get (contact
, QCstopbits
);
2674 tem
= Fplist_get (p
->childp
, QCstopbits
);
2676 tem
= make_number (1);
2678 if (XINT (tem
) != 1 && XINT (tem
) != 2)
2679 error (":stopbits must be nil (1 stopbit), 1, or 2");
2680 summary
[2] = XINT (tem
) + '0';
2681 #if defined (CSTOPB)
2682 attr
.c_cflag
&= ~CSTOPB
;
2683 if (XINT (tem
) == 2)
2684 attr
.c_cflag
|= CSTOPB
;
2686 /* Don't error on 1 stopbit, which should be set by cfmakeraw. */
2687 if (XINT (tem
) != 1)
2688 error ("Stopbits cannot be configured");
2690 childp2
= Fplist_put (childp2
, QCstopbits
, tem
);
2692 /* Configure flowcontrol. */
2693 if (!NILP (Fplist_member (contact
, QCflowcontrol
)))
2694 tem
= Fplist_get (contact
, QCflowcontrol
);
2696 tem
= Fplist_get (p
->childp
, QCflowcontrol
);
2697 if (!NILP (tem
) && !EQ (tem
, Qhw
) && !EQ (tem
, Qsw
))
2698 error (":flowcontrol must be nil (no flowcontrol), `hw', or `sw'");
2699 #if defined (CRTSCTS)
2700 attr
.c_cflag
&= ~CRTSCTS
;
2702 #if defined (CNEW_RTSCTS)
2703 attr
.c_cflag
&= ~CNEW_RTSCTS
;
2705 #if defined (IXON) && defined (IXOFF)
2706 attr
.c_iflag
&= ~(IXON
| IXOFF
);
2710 /* Already configured. */
2712 else if (EQ (tem
, Qhw
))
2714 #if defined (CRTSCTS)
2715 attr
.c_cflag
|= CRTSCTS
;
2716 #elif defined (CNEW_RTSCTS)
2717 attr
.c_cflag
|= CNEW_RTSCTS
;
2719 error ("Hardware flowcontrol (RTS/CTS) not supported");
2722 else if (EQ (tem
, Qsw
))
2724 #if defined (IXON) && defined (IXOFF)
2725 attr
.c_iflag
|= (IXON
| IXOFF
);
2727 error ("Software flowcontrol (XON/XOFF) not supported");
2730 childp2
= Fplist_put (childp2
, QCflowcontrol
, tem
);
2732 /* Activate configuration. */
2733 err
= tcsetattr (p
->outfd
, TCSANOW
, &attr
);
2735 report_file_error ("Failed tcsetattr", Qnil
);
2737 childp2
= Fplist_put (childp2
, QCsummary
, build_string (summary
));
2738 pset_childp (p
, childp2
);
2740 #endif /* not DOS_NT */
2742 /* System depended enumeration of and access to system processes a-la ps(1). */
2746 /* Process enumeration and access via /proc. */
2749 list_system_processes (void)
2751 Lisp_Object procdir
, match
, proclist
, next
;
2754 /* For every process on the system, there's a directory in the
2755 "/proc" pseudo-directory whose name is the numeric ID of that
2757 procdir
= build_string ("/proc");
2758 match
= build_string ("[0-9]+");
2759 proclist
= directory_files_internal (procdir
, Qnil
, match
, Qt
, 0, Qnil
);
2761 /* `proclist' gives process IDs as strings. Destructively convert
2762 each string into a number. */
2763 for (tail
= proclist
; CONSP (tail
); tail
= next
)
2766 XSETCAR (tail
, Fstring_to_number (XCAR (tail
), Qnil
));
2769 /* directory_files_internal returns the files in reverse order; undo
2771 proclist
= Fnreverse (proclist
);
2775 #elif defined DARWIN_OS || defined __FreeBSD__
2778 list_system_processes (void)
2781 int mib
[] = {CTL_KERN
, KERN_PROC
, KERN_PROC_ALL
};
2783 int mib
[] = {CTL_KERN
, KERN_PROC
, KERN_PROC_PROC
};
2786 struct kinfo_proc
*procs
;
2789 Lisp_Object proclist
= Qnil
;
2791 if (sysctl (mib
, 3, NULL
, &len
, NULL
, 0) != 0)
2794 procs
= xmalloc (len
);
2795 if (sysctl (mib
, 3, procs
, &len
, NULL
, 0) != 0)
2801 len
/= sizeof (struct kinfo_proc
);
2802 for (i
= 0; i
< len
; i
++)
2805 proclist
= Fcons (make_fixnum_or_float (procs
[i
].kp_proc
.p_pid
), proclist
);
2807 proclist
= Fcons (make_fixnum_or_float (procs
[i
].ki_pid
), proclist
);
2816 /* The WINDOWSNT implementation is in w32.c.
2817 The MSDOS implementation is in dosfns.c. */
2818 #elif !defined (WINDOWSNT) && !defined (MSDOS)
2821 list_system_processes (void)
2826 #endif /* !defined (WINDOWSNT) */
2828 #if defined GNU_LINUX && defined HAVE_LONG_LONG_INT
2829 static struct timespec
2830 time_from_jiffies (unsigned long long tval
, long hz
)
2832 unsigned long long s
= tval
/ hz
;
2833 unsigned long long frac
= tval
% hz
;
2836 if (TYPE_MAXIMUM (time_t) < s
)
2838 if (LONG_MAX
- 1 <= ULLONG_MAX
/ TIMESPEC_RESOLUTION
2839 || frac
<= ULLONG_MAX
/ TIMESPEC_RESOLUTION
)
2840 ns
= frac
* TIMESPEC_RESOLUTION
/ hz
;
2843 /* This is reachable only in the unlikely case that HZ * HZ
2844 exceeds ULLONG_MAX. It calculates an approximation that is
2845 guaranteed to be in range. */
2846 long hz_per_ns
= (hz
/ TIMESPEC_RESOLUTION
2847 + (hz
% TIMESPEC_RESOLUTION
!= 0));
2848 ns
= frac
/ hz_per_ns
;
2851 return make_timespec (s
, ns
);
2855 ltime_from_jiffies (unsigned long long tval
, long hz
)
2857 struct timespec t
= time_from_jiffies (tval
, hz
);
2858 return make_lisp_time (t
);
2861 static struct timespec
2865 struct timespec up
= make_timespec (0, 0);
2868 fup
= emacs_fopen ("/proc/uptime", "r");
2872 unsigned long long upsec
, upfrac
, idlesec
, idlefrac
;
2873 int upfrac_start
, upfrac_end
, idlefrac_start
, idlefrac_end
;
2875 if (fscanf (fup
, "%llu.%n%llu%n %llu.%n%llu%n",
2876 &upsec
, &upfrac_start
, &upfrac
, &upfrac_end
,
2877 &idlesec
, &idlefrac_start
, &idlefrac
, &idlefrac_end
)
2880 if (TYPE_MAXIMUM (time_t) < upsec
)
2882 upsec
= TYPE_MAXIMUM (time_t);
2883 upfrac
= TIMESPEC_RESOLUTION
- 1;
2887 int upfraclen
= upfrac_end
- upfrac_start
;
2888 for (; upfraclen
< LOG10_TIMESPEC_RESOLUTION
; upfraclen
++)
2890 for (; LOG10_TIMESPEC_RESOLUTION
< upfraclen
; upfraclen
--)
2892 upfrac
= min (upfrac
, TIMESPEC_RESOLUTION
- 1);
2894 up
= make_timespec (upsec
, upfrac
);
2903 #define MAJOR(d) (((unsigned)(d) >> 8) & 0xfff)
2904 #define MINOR(d) (((unsigned)(d) & 0xff) | (((unsigned)(d) & 0xfff00000) >> 12))
2907 procfs_ttyname (int rdev
)
2910 char name
[PATH_MAX
];
2913 fdev
= emacs_fopen ("/proc/tty/drivers", "r");
2919 unsigned long minor_beg
, minor_end
;
2920 char minor
[25]; /* 2 32-bit numbers + dash */
2923 for (; !feof (fdev
) && !ferror (fdev
); name
[0] = 0)
2925 if (fscanf (fdev
, "%*s %s %u %s %*s\n", name
, &major
, minor
) >= 3
2926 && major
== MAJOR (rdev
))
2928 minor_beg
= strtoul (minor
, &endp
, 0);
2930 minor_end
= minor_beg
;
2931 else if (*endp
== '-')
2932 minor_end
= strtoul (endp
+ 1, &endp
, 0);
2936 if (MINOR (rdev
) >= minor_beg
&& MINOR (rdev
) <= minor_end
)
2938 sprintf (name
+ strlen (name
), "%u", MINOR (rdev
));
2946 return build_string (name
);
2950 procfs_get_total_memory (void)
2953 uintmax_t retval
= 2 * 1024 * 1024; /* default: 2 GiB */
2957 fmem
= emacs_fopen ("/proc/meminfo", "r");
2961 uintmax_t entry_value
;
2965 switch (fscanf (fmem
, "MemTotal: %"SCNuMAX
, &entry_value
))
2968 retval
= entry_value
;
2973 while ((c
= getc (fmem
)) != EOF
&& c
!= '\n')
2991 system_process_attributes (Lisp_Object pid
)
2993 char procfn
[PATH_MAX
], fn
[PATH_MAX
];
2997 long clocks_per_sec
;
2999 char procbuf
[1025], *p
, *q
;
3002 static char const default_cmd
[] = "???";
3003 const char *cmd
= default_cmd
;
3004 int cmdsize
= sizeof default_cmd
- 1;
3005 char *cmdline
= NULL
;
3006 ptrdiff_t cmdline_size
;
3009 int ppid
, pgrp
, sess
, tty
, tpgid
, thcount
;
3012 unsigned long long u_time
, s_time
, cutime
, cstime
, start
;
3013 long priority
, niceness
, rss
;
3014 unsigned long minflt
, majflt
, cminflt
, cmajflt
, vsize
;
3015 struct timespec tnow
, tstart
, tboot
, telapsed
, us_time
;
3017 Lisp_Object attrs
= Qnil
;
3018 Lisp_Object cmd_str
, decoded_cmd
;
3021 CHECK_NUMBER_OR_FLOAT (pid
);
3022 CONS_TO_INTEGER (pid
, pid_t
, proc_id
);
3023 sprintf (procfn
, "/proc/%"pMd
, proc_id
);
3024 if (stat (procfn
, &st
) < 0)
3029 attrs
= Fcons (Fcons (Qeuid
, make_fixnum_or_float (uid
)), attrs
);
3031 pw
= getpwuid (uid
);
3034 attrs
= Fcons (Fcons (Quser
, build_string (pw
->pw_name
)), attrs
);
3037 attrs
= Fcons (Fcons (Qegid
, make_fixnum_or_float (gid
)), attrs
);
3039 gr
= getgrgid (gid
);
3042 attrs
= Fcons (Fcons (Qgroup
, build_string (gr
->gr_name
)), attrs
);
3044 count
= SPECPDL_INDEX ();
3045 strcpy (fn
, procfn
);
3046 procfn_end
= fn
+ strlen (fn
);
3047 strcpy (procfn_end
, "/stat");
3048 fd
= emacs_open (fn
, O_RDONLY
, 0);
3053 record_unwind_protect_int (close_file_unwind
, fd
);
3054 nread
= emacs_read (fd
, procbuf
, sizeof procbuf
- 1);
3058 procbuf
[nread
] = '\0';
3061 p
= strchr (p
, '(');
3064 q
= strrchr (p
+ 1, ')');
3074 /* Command name is encoded in locale-coding-system; decode it. */
3075 cmd_str
= make_unibyte_string (cmd
, cmdsize
);
3076 decoded_cmd
= code_convert_string_norecord (cmd_str
,
3077 Vlocale_coding_system
, 0);
3078 attrs
= Fcons (Fcons (Qcomm
, decoded_cmd
), attrs
);
3080 /* state ppid pgrp sess tty tpgid . minflt cminflt majflt cmajflt
3081 utime stime cutime cstime priority nice thcount . start vsize rss */
3083 && (sscanf (q
+ 2, ("%c %d %d %d %d %d %*u %lu %lu %lu %lu "
3084 "%Lu %Lu %Lu %Lu %ld %ld %d %*d %Lu %lu %ld"),
3085 &c
, &ppid
, &pgrp
, &sess
, &tty
, &tpgid
,
3086 &minflt
, &cminflt
, &majflt
, &cmajflt
,
3087 &u_time
, &s_time
, &cutime
, &cstime
,
3088 &priority
, &niceness
, &thcount
, &start
, &vsize
, &rss
)
3093 state_str
[1] = '\0';
3094 attrs
= Fcons (Fcons (Qstate
, build_string (state_str
)), attrs
);
3095 attrs
= Fcons (Fcons (Qppid
, make_fixnum_or_float (ppid
)), attrs
);
3096 attrs
= Fcons (Fcons (Qpgrp
, make_fixnum_or_float (pgrp
)), attrs
);
3097 attrs
= Fcons (Fcons (Qsess
, make_fixnum_or_float (sess
)), attrs
);
3098 attrs
= Fcons (Fcons (Qttname
, procfs_ttyname (tty
)), attrs
);
3099 attrs
= Fcons (Fcons (Qtpgid
, make_fixnum_or_float (tpgid
)), attrs
);
3100 attrs
= Fcons (Fcons (Qminflt
, make_fixnum_or_float (minflt
)), attrs
);
3101 attrs
= Fcons (Fcons (Qmajflt
, make_fixnum_or_float (majflt
)), attrs
);
3102 attrs
= Fcons (Fcons (Qcminflt
, make_fixnum_or_float (cminflt
)),
3104 attrs
= Fcons (Fcons (Qcmajflt
, make_fixnum_or_float (cmajflt
)),
3106 clocks_per_sec
= sysconf (_SC_CLK_TCK
);
3107 if (clocks_per_sec
< 0)
3108 clocks_per_sec
= 100;
3109 attrs
= Fcons (Fcons (Qutime
,
3110 ltime_from_jiffies (u_time
, clocks_per_sec
)),
3112 attrs
= Fcons (Fcons (Qstime
,
3113 ltime_from_jiffies (s_time
, clocks_per_sec
)),
3115 attrs
= Fcons (Fcons (Qtime
,
3116 ltime_from_jiffies (s_time
+ u_time
,
3119 attrs
= Fcons (Fcons (Qcutime
,
3120 ltime_from_jiffies (cutime
, clocks_per_sec
)),
3122 attrs
= Fcons (Fcons (Qcstime
,
3123 ltime_from_jiffies (cstime
, clocks_per_sec
)),
3125 attrs
= Fcons (Fcons (Qctime
,
3126 ltime_from_jiffies (cstime
+ cutime
,
3129 attrs
= Fcons (Fcons (Qpri
, make_number (priority
)), attrs
);
3130 attrs
= Fcons (Fcons (Qnice
, make_number (niceness
)), attrs
);
3131 attrs
= Fcons (Fcons (Qthcount
, make_fixnum_or_float (thcount
)),
3133 tnow
= current_timespec ();
3134 telapsed
= get_up_time ();
3135 tboot
= timespec_sub (tnow
, telapsed
);
3136 tstart
= time_from_jiffies (start
, clocks_per_sec
);
3137 tstart
= timespec_add (tboot
, tstart
);
3138 attrs
= Fcons (Fcons (Qstart
, make_lisp_time (tstart
)), attrs
);
3139 attrs
= Fcons (Fcons (Qvsize
, make_fixnum_or_float (vsize
/ 1024)),
3141 attrs
= Fcons (Fcons (Qrss
, make_fixnum_or_float (4 * rss
)), attrs
);
3142 telapsed
= timespec_sub (tnow
, tstart
);
3143 attrs
= Fcons (Fcons (Qetime
, make_lisp_time (telapsed
)), attrs
);
3144 us_time
= time_from_jiffies (u_time
+ s_time
, clocks_per_sec
);
3145 pcpu
= timespectod (us_time
) / timespectod (telapsed
);
3148 attrs
= Fcons (Fcons (Qpcpu
, make_float (100 * pcpu
)), attrs
);
3149 pmem
= 4.0 * 100 * rss
/ procfs_get_total_memory ();
3152 attrs
= Fcons (Fcons (Qpmem
, make_float (pmem
)), attrs
);
3155 unbind_to (count
, Qnil
);
3158 strcpy (procfn_end
, "/cmdline");
3159 fd
= emacs_open (fn
, O_RDONLY
, 0);
3162 ptrdiff_t readsize
, nread_incr
;
3163 record_unwind_protect_int (close_file_unwind
, fd
);
3164 record_unwind_protect_nothing ();
3165 nread
= cmdline_size
= 0;
3169 cmdline
= xpalloc (cmdline
, &cmdline_size
, 2, STRING_BYTES_BOUND
, 1);
3170 set_unwind_protect_ptr (count
+ 1, xfree
, cmdline
);
3172 /* Leave room even if every byte needs escaping below. */
3173 readsize
= (cmdline_size
>> 1) - nread
;
3175 nread_incr
= emacs_read (fd
, cmdline
+ nread
, readsize
);
3176 nread
+= max (0, nread_incr
);
3178 while (nread_incr
== readsize
);
3182 /* We don't want trailing null characters. */
3183 for (p
= cmdline
+ nread
; cmdline
< p
&& !p
[-1]; p
--)
3186 /* Escape-quote whitespace and backslashes. */
3187 q
= cmdline
+ cmdline_size
;
3192 if (c_isspace (c
) || c
== '\\')
3196 nread
= cmdline
+ cmdline_size
- q
;
3201 nread
= cmdsize
+ 2;
3202 cmdline_size
= nread
+ 1;
3203 q
= cmdline
= xrealloc (cmdline
, cmdline_size
);
3204 set_unwind_protect_ptr (count
+ 1, xfree
, cmdline
);
3205 sprintf (cmdline
, "[%.*s]", cmdsize
, cmd
);
3207 /* Command line is encoded in locale-coding-system; decode it. */
3208 cmd_str
= make_unibyte_string (q
, nread
);
3209 decoded_cmd
= code_convert_string_norecord (cmd_str
,
3210 Vlocale_coding_system
, 0);
3211 unbind_to (count
, Qnil
);
3212 attrs
= Fcons (Fcons (Qargs
, decoded_cmd
), attrs
);
3218 #elif defined (SOLARIS2) && defined (HAVE_PROCFS)
3220 /* The <procfs.h> header does not like to be included if _LP64 is defined and
3221 __FILE_OFFSET_BITS == 64. This is an ugly workaround that. */
3222 #if !defined (_LP64) && defined (_FILE_OFFSET_BITS) && (_FILE_OFFSET_BITS == 64)
3223 #define PROCFS_FILE_OFFSET_BITS_HACK 1
3224 #undef _FILE_OFFSET_BITS
3226 #define PROCFS_FILE_OFFSET_BITS_HACK 0
3231 #if PROCFS_FILE_OFFSET_BITS_HACK == 1
3232 #define _FILE_OFFSET_BITS 64
3233 #ifdef _FILE_OFFSET_BITS /* Avoid unused-macro warnings. */
3235 #endif /* PROCFS_FILE_OFFSET_BITS_HACK == 1 */
3238 system_process_attributes (Lisp_Object pid
)
3240 char procfn
[PATH_MAX
], fn
[PATH_MAX
];
3245 struct psinfo pinfo
;
3251 Lisp_Object attrs
= Qnil
;
3252 Lisp_Object decoded_cmd
;
3255 CHECK_NUMBER_OR_FLOAT (pid
);
3256 CONS_TO_INTEGER (pid
, pid_t
, proc_id
);
3257 sprintf (procfn
, "/proc/%"pMd
, proc_id
);
3258 if (stat (procfn
, &st
) < 0)
3263 attrs
= Fcons (Fcons (Qeuid
, make_fixnum_or_float (uid
)), attrs
);
3265 pw
= getpwuid (uid
);
3268 attrs
= Fcons (Fcons (Quser
, build_string (pw
->pw_name
)), attrs
);
3271 attrs
= Fcons (Fcons (Qegid
, make_fixnum_or_float (gid
)), attrs
);
3273 gr
= getgrgid (gid
);
3276 attrs
= Fcons (Fcons (Qgroup
, build_string (gr
->gr_name
)), attrs
);
3278 count
= SPECPDL_INDEX ();
3279 strcpy (fn
, procfn
);
3280 procfn_end
= fn
+ strlen (fn
);
3281 strcpy (procfn_end
, "/psinfo");
3282 fd
= emacs_open (fn
, O_RDONLY
, 0);
3287 record_unwind_protect (close_file_unwind
, fd
);
3288 nread
= emacs_read (fd
, &pinfo
, sizeof pinfo
);
3291 if (nread
== sizeof pinfo
)
3293 attrs
= Fcons (Fcons (Qppid
, make_fixnum_or_float (pinfo
.pr_ppid
)), attrs
);
3294 attrs
= Fcons (Fcons (Qpgrp
, make_fixnum_or_float (pinfo
.pr_pgid
)), attrs
);
3295 attrs
= Fcons (Fcons (Qsess
, make_fixnum_or_float (pinfo
.pr_sid
)), attrs
);
3299 state_str
[0] = pinfo
.pr_lwp
.pr_sname
;
3300 state_str
[1] = '\0';
3301 attrs
= Fcons (Fcons (Qstate
, build_string (state_str
)), attrs
);
3304 /* FIXME: missing Qttyname. psinfo.pr_ttydev is a dev_t,
3305 need to get a string from it. */
3307 /* FIXME: missing: Qtpgid */
3319 Are they available? */
3321 attrs
= Fcons (Fcons (Qtime
, make_lisp_time (pinfo
.pr_time
)), attrs
);
3322 attrs
= Fcons (Fcons (Qctime
, make_lisp_time (pinfo
.pr_ctime
)), attrs
);
3323 attrs
= Fcons (Fcons (Qpri
, make_number (pinfo
.pr_lwp
.pr_pri
)), attrs
);
3324 attrs
= Fcons (Fcons (Qnice
, make_number (pinfo
.pr_lwp
.pr_nice
)), attrs
);
3325 attrs
= Fcons (Fcons (Qthcount
, make_fixnum_or_float (pinfo
.pr_nlwp
)),
3328 attrs
= Fcons (Fcons (Qstart
, make_lisp_time (pinfo
.pr_start
)), attrs
);
3329 attrs
= Fcons (Fcons (Qvsize
, make_fixnum_or_float (pinfo
.pr_size
)),
3331 attrs
= Fcons (Fcons (Qrss
, make_fixnum_or_float (pinfo
.pr_rssize
)),
3334 /* pr_pctcpu and pr_pctmem are unsigned integers in the
3335 range 0 .. 2**15, representing 0.0 .. 1.0. */
3336 attrs
= Fcons (Fcons (Qpcpu
,
3337 make_float (100.0 / 0x8000 * pinfo
.pr_pctcpu
)),
3339 attrs
= Fcons (Fcons (Qpmem
,
3340 make_float (100.0 / 0x8000 * pinfo
.pr_pctmem
)),
3343 decoded_cmd
= (code_convert_string_norecord
3344 (build_unibyte_string (pinfo
.pr_fname
),
3345 Vlocale_coding_system
, 0));
3346 attrs
= Fcons (Fcons (Qcomm
, decoded_cmd
), attrs
);
3347 decoded_cmd
= (code_convert_string_norecord
3348 (build_unibyte_string (pinfo
.pr_psargs
),
3349 Vlocale_coding_system
, 0));
3350 attrs
= Fcons (Fcons (Qargs
, decoded_cmd
), attrs
);
3352 unbind_to (count
, Qnil
);
3356 #elif defined __FreeBSD__
3358 static struct timespec
3359 timeval_to_timespec (struct timeval t
)
3361 return make_timespec (t
.tv_sec
, t
.tv_usec
* 1000);
3365 make_lisp_timeval (struct timeval t
)
3367 return make_lisp_time (timeval_to_timespec (t
));
3371 system_process_attributes (Lisp_Object pid
)
3374 int pagesize
= getpagesize ();
3375 unsigned long npages
;
3381 char args
[MAXPATHLEN
];
3382 struct timespec t
, now
;
3384 int mib
[4] = {CTL_KERN
, KERN_PROC
, KERN_PROC_PID
};
3385 struct kinfo_proc proc
;
3386 size_t proclen
= sizeof proc
;
3388 Lisp_Object attrs
= Qnil
;
3389 Lisp_Object decoded_comm
;
3391 CHECK_NUMBER_OR_FLOAT (pid
);
3392 CONS_TO_INTEGER (pid
, int, proc_id
);
3395 if (sysctl (mib
, 4, &proc
, &proclen
, NULL
, 0) != 0)
3398 attrs
= Fcons (Fcons (Qeuid
, make_fixnum_or_float (proc
.ki_uid
)), attrs
);
3401 pw
= getpwuid (proc
.ki_uid
);
3404 attrs
= Fcons (Fcons (Quser
, build_string (pw
->pw_name
)), attrs
);
3406 attrs
= Fcons (Fcons (Qegid
, make_fixnum_or_float (proc
.ki_svgid
)), attrs
);
3409 gr
= getgrgid (proc
.ki_svgid
);
3412 attrs
= Fcons (Fcons (Qgroup
, build_string (gr
->gr_name
)), attrs
);
3414 decoded_comm
= (code_convert_string_norecord
3415 (build_unibyte_string (proc
.ki_comm
),
3416 Vlocale_coding_system
, 0));
3418 attrs
= Fcons (Fcons (Qcomm
, decoded_comm
), attrs
);
3420 char state
[2] = {'\0', '\0'};
3421 switch (proc
.ki_stat
)
3443 attrs
= Fcons (Fcons (Qstate
, build_string (state
)), attrs
);
3446 attrs
= Fcons (Fcons (Qppid
, make_fixnum_or_float (proc
.ki_ppid
)), attrs
);
3447 attrs
= Fcons (Fcons (Qpgrp
, make_fixnum_or_float (proc
.ki_pgid
)), attrs
);
3448 attrs
= Fcons (Fcons (Qsess
, make_fixnum_or_float (proc
.ki_sid
)), attrs
);
3451 ttyname
= proc
.ki_tdev
== NODEV
? NULL
: devname (proc
.ki_tdev
, S_IFCHR
);
3454 attrs
= Fcons (Fcons (Qtty
, build_string (ttyname
)), attrs
);
3456 attrs
= Fcons (Fcons (Qtpgid
, make_fixnum_or_float (proc
.ki_tpgid
)), attrs
);
3457 attrs
= Fcons (Fcons (Qminflt
, make_fixnum_or_float (proc
.ki_rusage
.ru_minflt
)), attrs
);
3458 attrs
= Fcons (Fcons (Qmajflt
, make_fixnum_or_float (proc
.ki_rusage
.ru_majflt
)), attrs
);
3459 attrs
= Fcons (Fcons (Qcminflt
, make_number (proc
.ki_rusage_ch
.ru_minflt
)), attrs
);
3460 attrs
= Fcons (Fcons (Qcmajflt
, make_number (proc
.ki_rusage_ch
.ru_majflt
)), attrs
);
3462 attrs
= Fcons (Fcons (Qutime
, make_lisp_timeval (proc
.ki_rusage
.ru_utime
)),
3464 attrs
= Fcons (Fcons (Qstime
, make_lisp_timeval (proc
.ki_rusage
.ru_stime
)),
3466 t
= timespec_add (timeval_to_timespec (proc
.ki_rusage
.ru_utime
),
3467 timeval_to_timespec (proc
.ki_rusage
.ru_stime
));
3468 attrs
= Fcons (Fcons (Qtime
, make_lisp_time (t
)), attrs
);
3470 attrs
= Fcons (Fcons (Qcutime
,
3471 make_lisp_timeval (proc
.ki_rusage_ch
.ru_utime
)),
3473 attrs
= Fcons (Fcons (Qcstime
,
3474 make_lisp_timeval (proc
.ki_rusage_ch
.ru_utime
)),
3476 t
= timespec_add (timeval_to_timespec (proc
.ki_rusage_ch
.ru_utime
),
3477 timeval_to_timespec (proc
.ki_rusage_ch
.ru_stime
));
3478 attrs
= Fcons (Fcons (Qctime
, make_lisp_time (t
)), attrs
);
3480 attrs
= Fcons (Fcons (Qthcount
, make_fixnum_or_float (proc
.ki_numthreads
)),
3482 attrs
= Fcons (Fcons (Qpri
, make_number (proc
.ki_pri
.pri_native
)), attrs
);
3483 attrs
= Fcons (Fcons (Qnice
, make_number (proc
.ki_nice
)), attrs
);
3484 attrs
= Fcons (Fcons (Qstart
, make_lisp_timeval (proc
.ki_start
)), attrs
);
3485 attrs
= Fcons (Fcons (Qvsize
, make_number (proc
.ki_size
>> 10)), attrs
);
3486 attrs
= Fcons (Fcons (Qrss
, make_number (proc
.ki_rssize
* pagesize
>> 10)),
3489 now
= current_timespec ();
3490 t
= timespec_sub (now
, timeval_to_timespec (proc
.ki_start
));
3491 attrs
= Fcons (Fcons (Qetime
, make_lisp_time (t
)), attrs
);
3493 len
= sizeof fscale
;
3494 if (sysctlbyname ("kern.fscale", &fscale
, &len
, NULL
, 0) == 0)
3499 if (sysctlbyname ("kern.ccpu", &ccpu
, &len
, NULL
, 0) == 0)
3501 pcpu
= (100.0 * proc
.ki_pctcpu
/ fscale
3502 / (1 - exp (proc
.ki_swtime
* log ((double) ccpu
/ fscale
))));
3503 attrs
= Fcons (Fcons (Qpcpu
, make_fixnum_or_float (pcpu
)), attrs
);
3507 len
= sizeof npages
;
3508 if (sysctlbyname ("hw.availpages", &npages
, &len
, NULL
, 0) == 0)
3510 double pmem
= (proc
.ki_flag
& P_INMEM
3511 ? 100.0 * proc
.ki_rssize
/ npages
3513 attrs
= Fcons (Fcons (Qpmem
, make_fixnum_or_float (pmem
)), attrs
);
3516 mib
[2] = KERN_PROC_ARGS
;
3518 if (sysctl (mib
, 4, args
, &len
, NULL
, 0) == 0)
3521 for (i
= 0; i
< len
; i
++)
3523 if (! args
[i
] && i
< len
- 1)
3528 (code_convert_string_norecord
3529 (build_unibyte_string (args
),
3530 Vlocale_coding_system
, 0));
3532 attrs
= Fcons (Fcons (Qargs
, decoded_comm
), attrs
);
3538 /* The WINDOWSNT implementation is in w32.c.
3539 The MSDOS implementation is in dosfns.c. */
3540 #elif !defined (WINDOWSNT) && !defined (MSDOS)
3543 system_process_attributes (Lisp_Object pid
)
3548 #endif /* !defined (WINDOWSNT) */
3550 /* Wide character string collation. */
3552 #ifdef __STDC_ISO_10646__
3554 # include <wctype.h>
3556 # if defined HAVE_NEWLOCALE || defined HAVE_SETLOCALE
3557 # include <locale.h>
3560 # define LC_COLLATE 0
3562 # ifndef LC_COLLATE_MASK
3563 # define LC_COLLATE_MASK 0
3568 # ifndef LC_CTYPE_MASK
3569 # define LC_CTYPE_MASK 0
3572 # ifndef HAVE_NEWLOCALE
3578 # define freelocale emacs_freelocale
3579 # define locale_t emacs_locale_t
3580 # define newlocale emacs_newlocale
3581 # define wcscoll_l emacs_wcscoll_l
3582 # define towlower_l emacs_towlower_l
3584 typedef char const *locale_t
;
3587 newlocale (int category_mask
, char const *locale
, locale_t loc
)
3593 freelocale (locale_t loc
)
3598 emacs_setlocale (int category
, char const *locale
)
3600 # ifdef HAVE_SETLOCALE
3602 char *loc
= setlocale (category
, locale
);
3613 wcscoll_l (wchar_t const *a
, wchar_t const *b
, locale_t loc
)
3616 char *oldloc
= emacs_setlocale (LC_COLLATE
, NULL
);
3624 char *oldcopy
= SAFE_ALLOCA (strlen (oldloc
) + 1);
3625 strcpy (oldcopy
, oldloc
);
3626 if (! emacs_setlocale (LC_COLLATE
, loc
))
3631 result
= wcscoll (a
, b
);
3633 if (! emacs_setlocale (LC_COLLATE
, oldcopy
))
3644 towlower_l (wint_t wc
, locale_t loc
)
3647 char *oldloc
= emacs_setlocale (LC_CTYPE
, NULL
);
3652 char *oldcopy
= SAFE_ALLOCA (strlen (oldloc
) + 1);
3653 strcpy (oldcopy
, oldloc
);
3654 if (emacs_setlocale (LC_CTYPE
, loc
))
3656 result
= towlower (wc
);
3657 emacs_setlocale (LC_COLLATE
, oldcopy
);
3667 str_collate (Lisp_Object s1
, Lisp_Object s2
,
3668 Lisp_Object locale
, Lisp_Object ignore_case
)
3671 ptrdiff_t len
, i
, i_byte
;
3676 /* Convert byte stream to code points. */
3677 len
= SCHARS (s1
); i
= i_byte
= 0;
3678 SAFE_NALLOCA (p1
, 1, len
+ 1);
3680 FETCH_STRING_CHAR_ADVANCE (*(p1
+i
-1), s1
, i
, i_byte
);
3683 len
= SCHARS (s2
); i
= i_byte
= 0;
3684 SAFE_NALLOCA (p2
, 1, len
+ 1);
3686 FETCH_STRING_CHAR_ADVANCE (*(p2
+i
-1), s2
, i
, i_byte
);
3689 if (STRINGP (locale
))
3691 locale_t loc
= newlocale (LC_COLLATE_MASK
| LC_CTYPE_MASK
,
3692 SSDATA (locale
), 0);
3694 error ("Invalid locale %s: %s", SSDATA (locale
), strerror (errno
));
3696 if (! NILP (ignore_case
))
3697 for (int i
= 1; i
< 3; i
++)
3699 wchar_t *p
= (i
== 1) ? p1
: p2
;
3701 *p
= towlower_l (*p
, loc
);
3705 res
= wcscoll_l (p1
, p2
, loc
);
3711 if (! NILP (ignore_case
))
3712 for (int i
= 1; i
< 3; i
++)
3714 wchar_t *p
= (i
== 1) ? p1
: p2
;
3720 res
= wcscoll (p1
, p2
);
3723 # ifndef HAVE_NEWLOCALE
3725 error ("Invalid locale or string for collation: %s", strerror (err
));
3728 error ("Invalid string for collation: %s", strerror (err
));
3734 #endif /* __STDC_ISO_10646__ */
3738 str_collate (Lisp_Object s1
, Lisp_Object s2
,
3739 Lisp_Object locale
, Lisp_Object ignore_case
)
3742 char *loc
= STRINGP (locale
) ? SSDATA (locale
) : NULL
;
3743 int res
, err
= errno
;
3746 res
= w32_compare_strings (SDATA (s1
), SDATA (s2
), loc
, !NILP (ignore_case
));
3748 error ("Invalid string for collation: %s", strerror (errno
));
3753 #endif /* WINDOWSNT */