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 (at
10 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 /* If FD is not already open, arrange for it to be open with FLAGS. */
135 force_open (int fd
, int flags
)
137 if (dup2 (fd
, fd
) < 0 && errno
== EBADF
)
139 int n
= open (NULL_DEVICE
, flags
);
140 if (n
< 0 || (fd
!= n
&& (dup2 (n
, fd
) < 0 || emacs_close (n
) != 0)))
142 emacs_perror (NULL_DEVICE
);
148 /* Make sure stdin, stdout, and stderr are open to something, so that
149 their file descriptors are not hijacked by later system calls. */
151 init_standard_fds (void)
153 /* Open stdin for *writing*, and stdout and stderr for *reading*.
154 That way, any attempt to do normal I/O will result in an error,
155 just as if the files were closed, and the file descriptors will
156 not be reused by later opens. */
157 force_open (STDIN_FILENO
, O_WRONLY
);
158 force_open (STDOUT_FILENO
, O_RDONLY
);
159 force_open (STDERR_FILENO
, O_RDONLY
);
162 /* Return the current working directory. The result should be freed
163 with 'free'. Return NULL on errors. */
165 emacs_get_current_dir_name (void)
167 # if HAVE_GET_CURRENT_DIR_NAME && !BROKEN_GET_CURRENT_DIR_NAME
168 # ifdef HYBRID_MALLOC
169 bool use_libc
= bss_sbrk_did_unexec
;
171 bool use_libc
= true;
174 return get_current_dir_name ();
178 char *pwd
= getenv ("PWD");
179 struct stat dotstat
, pwdstat
;
180 /* If PWD is accurate, use it instead of calling getcwd. PWD is
181 sometimes a nicer name, and using it may avoid a fatal error if a
182 parent directory is searchable but not readable. */
184 && (IS_DIRECTORY_SEP (*pwd
) || (*pwd
&& IS_DEVICE_SEP (pwd
[1])))
185 && stat (pwd
, &pwdstat
) == 0
186 && stat (".", &dotstat
) == 0
187 && dotstat
.st_ino
== pwdstat
.st_ino
188 && dotstat
.st_dev
== pwdstat
.st_dev
190 && strlen (pwd
) < MAXPATHLEN
194 buf
= malloc (strlen (pwd
) + 1);
201 size_t buf_size
= 1024;
202 buf
= malloc (buf_size
);
207 if (getcwd (buf
, buf_size
) == buf
)
211 int tmp_errno
= errno
;
217 buf
= realloc (buf
, buf_size
);
226 /* Discard pending input on all input descriptors. */
229 discard_tty_input (void)
232 struct emacs_tty buf
;
237 #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */
238 while (dos_keyread () != -1)
240 #else /* not MSDOS */
242 struct tty_display_info
*tty
;
243 for (tty
= tty_list
; tty
; tty
= tty
->next
)
245 if (tty
->input
) /* Is the device suspended? */
247 emacs_get_tty (fileno (tty
->input
), &buf
);
248 emacs_set_tty (fileno (tty
->input
), &buf
, 0);
252 #endif /* not MSDOS */
253 #endif /* not WINDOWSNT */
259 /* Arrange for character C to be read as the next input from
261 XXX What if we have multiple ttys?
267 if (! (FRAMEP (selected_frame
)
268 && FRAME_LIVE_P (XFRAME (selected_frame
))
269 && FRAME_TERMCAP_P (XFRAME (selected_frame
))))
272 /* Should perhaps error if in batch mode */
274 ioctl (fileno (CURTTY()->input
), TIOCSTI
, &c
);
275 #else /* no TIOCSTI */
276 error ("Cannot stuff terminal input characters in this version of Unix");
277 #endif /* no TIOCSTI */
283 init_baud_rate (int fd
)
293 #else /* not DOS_NT */
298 emacs_ospeed
= cfgetospeed (&sg
);
299 #endif /* not DOS_NT */
302 baud_rate
= (emacs_ospeed
< ARRAYELTS (baud_convert
)
303 ? baud_convert
[emacs_ospeed
] : 9600);
312 /* Wait for the subprocess with process id CHILD to terminate or change status.
313 CHILD must be a child process that has not been reaped.
314 If STATUS is non-null, store the waitpid-style exit status into *STATUS
315 and tell wait_reading_process_output that it needs to look around.
316 Use waitpid-style OPTIONS when waiting.
317 If INTERRUPTIBLE, this function is interruptible by a signal.
319 Return CHILD if successful, 0 if no status is available;
320 the latter is possible only when options & NOHANG. */
322 get_child_status (pid_t child
, int *status
, int options
, bool interruptible
)
326 /* Invoke waitpid only with a known process ID; do not invoke
327 waitpid with a nonpositive argument. Otherwise, Emacs might
328 reap an unwanted process by mistake. For example, invoking
329 waitpid (-1, ...) can mess up glib by reaping glib's subprocesses,
330 so that another thread running glib won't find them. */
333 while ((pid
= waitpid (child
, status
, options
)) < 0)
335 /* Check that CHILD is a child process that has not been reaped,
336 and that STATUS and OPTIONS are valid. Otherwise abort,
337 as continuing after this internal error could cause Emacs to
338 become confused and kill innocent-victim processes. */
342 /* Note: the MS-Windows emulation of waitpid calls QUIT
348 /* If successful and status is requested, tell wait_reading_process_output
349 that it needs to wake up and look around. */
350 if (pid
&& status
&& input_available_clear_time
)
351 *input_available_clear_time
= make_timespec (0, 0);
356 /* Wait for the subprocess with process id CHILD to terminate.
357 CHILD must be a child process that has not been reaped.
358 If STATUS is non-null, store the waitpid-style exit status into *STATUS
359 and tell wait_reading_process_output that it needs to look around.
360 If INTERRUPTIBLE, this function is interruptible by a signal. */
362 wait_for_termination (pid_t child
, int *status
, bool interruptible
)
364 get_child_status (child
, status
, 0, interruptible
);
367 /* Report whether the subprocess with process id CHILD has changed status.
368 Termination counts as a change of status.
369 CHILD must be a child process that has not been reaped.
370 If STATUS is non-null, store the waitpid-style exit status into *STATUS
371 and tell wait_reading_process_output that it needs to look around.
372 Use waitpid-style OPTIONS to check status, but do not wait.
374 Return CHILD if successful, 0 if no status is available because
375 the process's state has not changed. */
377 child_status_changed (pid_t child
, int *status
, int options
)
379 return get_child_status (child
, status
, WNOHANG
| options
, 0);
383 /* Set up the terminal at the other end of a pseudo-terminal that
384 we will be controlling an inferior through.
385 It should not echo or do line-editing, since that is done
386 in Emacs. No padding needed for insertion into an Emacs buffer. */
389 child_setup_tty (int out
)
394 emacs_get_tty (out
, &s
);
395 s
.main
.c_oflag
|= OPOST
; /* Enable output postprocessing */
396 s
.main
.c_oflag
&= ~ONLCR
; /* Disable map of NL to CR-NL on output */
398 /* http://lists.gnu.org/archive/html/emacs-devel/2008-05/msg00406.html
399 Some versions of GNU Hurd do not have FFDLY? */
401 s
.main
.c_oflag
&= ~(NLDLY
|CRDLY
|TABDLY
|BSDLY
|VTDLY
|FFDLY
);
402 /* No output delays */
404 s
.main
.c_oflag
&= ~(NLDLY
|CRDLY
|TABDLY
|BSDLY
|VTDLY
);
405 /* No output delays */
408 s
.main
.c_lflag
&= ~ECHO
; /* Disable echo */
409 s
.main
.c_lflag
|= ISIG
; /* Enable signals */
411 s
.main
.c_iflag
&= ~IUCLC
; /* Disable downcasing on input. */
414 s
.main
.c_iflag
&= ~ISTRIP
; /* don't strip 8th bit on input */
417 s
.main
.c_oflag
&= ~OLCUC
; /* Disable upcasing on output. */
419 s
.main
.c_oflag
&= ~TAB3
; /* Disable tab expansion */
420 s
.main
.c_cflag
= (s
.main
.c_cflag
& ~CSIZE
) | CS8
; /* Don't strip 8th bit */
421 s
.main
.c_cc
[VERASE
] = CDISABLE
; /* disable erase processing */
422 s
.main
.c_cc
[VKILL
] = CDISABLE
; /* disable kill processing */
425 s
.main
.c_cflag
= (s
.main
.c_cflag
& ~CBAUD
) | B9600
; /* baud rate sanity */
428 #ifdef SIGNALS_VIA_CHARACTERS
429 /* the QUIT and INTR character are used in process_send_signal
430 so set them here to something useful. */
431 if (s
.main
.c_cc
[VQUIT
] == CDISABLE
)
432 s
.main
.c_cc
[VQUIT
] = '\\'&037; /* Control-\ */
433 if (s
.main
.c_cc
[VINTR
] == CDISABLE
)
434 s
.main
.c_cc
[VINTR
] = 'C'&037; /* Control-C */
435 #endif /* not SIGNALS_VIA_CHARACTERS */
438 /* Also, PTY overloads NUL and BREAK.
439 don't ignore break, but don't signal either, so it looks like NUL. */
440 s
.main
.c_iflag
&= ~IGNBRK
;
441 s
.main
.c_iflag
&= ~BRKINT
;
442 /* rms: Formerly it set s.main.c_cc[VINTR] to 0377 here
443 unconditionally. Then a SIGNALS_VIA_CHARACTERS conditional
444 would force it to 0377. That looks like duplicated code. */
445 s
.main
.c_cflag
= (s
.main
.c_cflag
& ~CBAUD
) | B9600
; /* baud rate sanity */
448 /* We originally enabled ICANON (and set VEOF to 04), and then had
449 process.c send additional EOF chars to flush the output when faced
450 with long lines, but this leads to weird effects when the
451 subprocess has disabled ICANON and ends up seeing those spurious
452 extra EOFs. So we don't send EOFs any more in
453 process.c:send_process. First we tried to disable ICANON by
454 default, so if a subsprocess sets up ICANON, it's his problem (or
455 the Elisp package that talks to it) to deal with lines that are
456 too long. But this disables some features, such as the ability
457 to send EOF signals. So we re-enabled ICANON but there is no
458 more "send eof to flush" going on (which is wrong and unportable
459 in itself). The correct way to handle too much output is to
460 buffer what could not be written and then write it again when
461 select returns ok for writing. This has it own set of
462 problems. Write is now asynchronous, is that a problem? How much
463 do we buffer, and what do we do when that limit is reached? */
465 s
.main
.c_lflag
|= ICANON
; /* Enable line editing and eof processing */
466 s
.main
.c_cc
[VEOF
] = 'D'&037; /* Control-D */
467 #if 0 /* These settings only apply to non-ICANON mode. */
468 s
.main
.c_cc
[VMIN
] = 1;
469 s
.main
.c_cc
[VTIME
] = 0;
472 emacs_set_tty (out
, &s
, 0);
473 #endif /* not WINDOWSNT */
475 #endif /* not MSDOS */
478 /* Record a signal code and the action for it. */
482 struct sigaction action
;
485 static void save_signal_handlers (struct save_signal
*);
486 static void restore_signal_handlers (struct save_signal
*);
488 /* Suspend the Emacs process; give terminal to its superior. */
496 /* On a system where suspending is not implemented,
497 instead fork a subshell and let it talk directly to the terminal
504 /* Fork a subshell. */
509 #ifdef DOS_NT /* Demacs 1.1.2 91/10/20 Manabu Higashida */
512 char oldwd
[MAXPATHLEN
+1]; /* Fixed length is safe on MSDOS. */
514 char oldwd
[MAX_UTF8_PATH
];
519 struct save_signal saved_handlers
[5];
520 char *str
= SSDATA (encode_current_directory ());
526 char *volatile str_volatile
= str
;
533 error ("Can't spawn subshell");
535 saved_handlers
[0].code
= SIGINT
;
536 saved_handlers
[1].code
= SIGQUIT
;
537 saved_handlers
[2].code
= SIGTERM
;
539 saved_handlers
[3].code
= SIGIO
;
540 saved_handlers
[4].code
= 0;
542 saved_handlers
[3].code
= 0;
546 save_signal_handlers (saved_handlers
);
553 #ifdef DOS_NT /* MW, Aug 1993 */
554 getcwd (oldwd
, sizeof oldwd
);
556 sh
= egetenv ("SUSPEND"); /* KFS, 1994-12-14 */
559 sh
= egetenv ("SHELL");
563 /* Use our buffer's default directory for the subshell. */
564 if (chdir (str
) != 0)
568 _exit (EXIT_CANCELED
);
572 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */
574 char *epwd
= getenv ("PWD");
575 char old_pwd
[MAXPATHLEN
+1+4];
577 /* If PWD is set, pass it with corrected value. */
580 strcpy (old_pwd
, epwd
);
581 setenv ("PWD", str
, 1);
584 chdir (oldwd
); /* FIXME: Do the right thing on chdir failure. */
586 putenv (old_pwd
); /* restore previous value */
588 #else /* not MSDOS */
590 /* Waits for process completion */
591 pid
= _spawnlp (_P_WAIT
, sh
, sh
, NULL
);
592 chdir (oldwd
); /* FIXME: Do the right thing on chdir failure. */
594 write (1, "Can't execute subshell", 22);
595 #else /* not WINDOWSNT */
596 execlp (sh
, sh
, (char *) 0);
598 _exit (errno
== ENOENT
? EXIT_ENOENT
: EXIT_CANNOT_INVOKE
);
599 #endif /* not WINDOWSNT */
600 #endif /* not MSDOS */
603 /* Do this now if we did not do it before. */
605 save_signal_handlers (saved_handlers
);
609 wait_for_termination (pid
, &status
, 0);
611 restore_signal_handlers (saved_handlers
);
615 save_signal_handlers (struct save_signal
*saved_handlers
)
617 while (saved_handlers
->code
)
619 struct sigaction action
;
620 emacs_sigaction_init (&action
, SIG_IGN
);
621 sigaction (saved_handlers
->code
, &action
, &saved_handlers
->action
);
627 restore_signal_handlers (struct save_signal
*saved_handlers
)
629 while (saved_handlers
->code
)
631 sigaction (saved_handlers
->code
, &saved_handlers
->action
, 0);
637 static int old_fcntl_flags
[FD_SETSIZE
];
644 old_fcntl_flags
[fd
] = fcntl (fd
, F_GETFL
, 0) & ~FASYNC
;
645 fcntl (fd
, F_SETFL
, old_fcntl_flags
[fd
] | FASYNC
);
646 interrupts_deferred
= 0;
655 fcntl (fd
, F_SETFL
, old_fcntl_flags
[fd
]);
669 sigemptyset (&unblocked
);
671 sigaddset (&unblocked
, SIGWINCH
);
673 sigaddset (&unblocked
, SIGIO
);
674 pthread_sigmask (SIG_UNBLOCK
, &unblocked
, 0);
676 interrupts_deferred
= 0;
681 unrequest_sigio (void)
689 sigemptyset (&blocked
);
691 sigaddset (&blocked
, SIGWINCH
);
693 sigaddset (&blocked
, SIGIO
);
694 pthread_sigmask (SIG_BLOCK
, &blocked
, 0);
695 interrupts_deferred
= 1;
703 block_child_signal (sigset_t
*oldset
)
706 sigemptyset (&blocked
);
707 sigaddset (&blocked
, SIGCHLD
);
708 sigaddset (&blocked
, SIGINT
);
709 pthread_sigmask (SIG_BLOCK
, &blocked
, oldset
);
712 /* Unblock SIGCHLD. */
715 unblock_child_signal (sigset_t
const *oldset
)
717 pthread_sigmask (SIG_SETMASK
, oldset
, 0);
722 /* Saving and restoring the process group of Emacs's terminal. */
724 /* The process group of which Emacs was a member when it initially
727 If Emacs was in its own process group (i.e. inherited_pgroup ==
728 getpid ()), then we know we're running under a shell with job
729 control (Emacs would never be run as part of a pipeline).
732 If Emacs was not in its own process group, then we know we're
733 running under a shell (or a caller) that doesn't know how to
734 separate itself from Emacs (like sh). Emacs must be in its own
735 process group in order to receive SIGIO correctly. In this
736 situation, we put ourselves in our own pgroup, forcibly set the
737 tty's pgroup to our pgroup, and make sure to restore and reinstate
738 the tty's pgroup just like any other terminal setting. If
739 inherited_group was not the tty's pgroup, then we'll get a
740 SIGTTmumble when we try to change the tty's pgroup, and a CONT if
741 it goes foreground in the future, which is what should happen. */
743 static pid_t inherited_pgroup
;
746 init_foreground_group (void)
748 pid_t pgrp
= getpgrp ();
749 inherited_pgroup
= getpid () == pgrp
? 0 : pgrp
;
752 /* Block and unblock SIGTTOU. */
755 block_tty_out_signal (sigset_t
*oldset
)
759 sigemptyset (&blocked
);
760 sigaddset (&blocked
, SIGTTOU
);
761 pthread_sigmask (SIG_BLOCK
, &blocked
, oldset
);
766 unblock_tty_out_signal (sigset_t
const *oldset
)
769 pthread_sigmask (SIG_SETMASK
, oldset
, 0);
773 /* Safely set a controlling terminal FD's process group to PGID.
774 If we are not in the foreground already, POSIX requires tcsetpgrp
775 to deliver a SIGTTOU signal, which would stop us. This is an
776 annoyance, so temporarily ignore the signal.
778 In practice, platforms lacking SIGTTOU also lack tcsetpgrp, so
779 skip all this unless SIGTTOU is defined. */
781 tcsetpgrp_without_stopping (int fd
, pid_t pgid
)
786 block_tty_out_signal (&oldset
);
787 tcsetpgrp (fd
, pgid
);
788 unblock_tty_out_signal (&oldset
);
793 /* Split off the foreground process group to Emacs alone. When we are
794 in the foreground, but not started in our own process group,
795 redirect the tty device handle FD to point to our own process
796 group. FD must be the file descriptor of the controlling tty. */
798 narrow_foreground_group (int fd
)
800 if (inherited_pgroup
&& setpgid (0, 0) == 0)
801 tcsetpgrp_without_stopping (fd
, getpid ());
804 /* Set the tty to our original foreground group. */
806 widen_foreground_group (int fd
)
808 if (inherited_pgroup
&& setpgid (0, inherited_pgroup
) == 0)
809 tcsetpgrp_without_stopping (fd
, inherited_pgroup
);
812 /* Getting and setting emacs_tty structures. */
814 /* Set *TC to the parameters associated with the terminal FD,
815 or clear it if the parameters are not available.
816 Return 0 on success, -1 on failure. */
818 emacs_get_tty (int fd
, struct emacs_tty
*settings
)
820 /* Retrieve the primary parameters - baud rate, character size, etcetera. */
821 memset (&settings
->main
, 0, sizeof (settings
->main
));
824 HANDLE h
= (HANDLE
)_get_osfhandle (fd
);
827 if (h
&& h
!= INVALID_HANDLE_VALUE
&& GetConsoleMode (h
, &console_mode
))
829 settings
->main
= console_mode
;
832 #endif /* WINDOWSNT */
835 /* We have those nifty POSIX tcmumbleattr functions. */
836 return tcgetattr (fd
, &settings
->main
);
841 /* Set the parameters of the tty on FD according to the contents of
842 *SETTINGS. If FLUSHP, discard input.
843 Return 0 if all went well, and -1 (setting errno) if anything failed. */
846 emacs_set_tty (int fd
, struct emacs_tty
*settings
, bool flushp
)
848 /* Set the primary parameters - baud rate, character size, etcetera. */
851 HANDLE h
= (HANDLE
)_get_osfhandle (fd
);
853 if (h
&& h
!= INVALID_HANDLE_VALUE
)
857 /* Assume the handle is open for input. */
859 FlushConsoleInputBuffer (h
);
860 new_mode
= settings
->main
;
861 SetConsoleMode (h
, new_mode
);
863 #endif /* WINDOWSNT */
866 /* We have those nifty POSIX tcmumbleattr functions.
867 William J. Smith <wjs@wiis.wang.com> writes:
868 "POSIX 1003.1 defines tcsetattr to return success if it was
869 able to perform any of the requested actions, even if some
870 of the requested actions could not be performed.
871 We must read settings back to ensure tty setup properly.
872 AIX requires this to keep tty from hanging occasionally." */
873 /* This make sure that we don't loop indefinitely in here. */
874 for (i
= 0 ; i
< 10 ; i
++)
875 if (tcsetattr (fd
, flushp
? TCSAFLUSH
: TCSADRAIN
, &settings
->main
) < 0)
886 memset (&new, 0, sizeof (new));
887 /* Get the current settings, and see if they're what we asked for. */
888 tcgetattr (fd
, &new);
889 /* We cannot use memcmp on the whole structure here because under
890 * aix386 the termios structure has some reserved field that may
893 if ( new.c_iflag
== settings
->main
.c_iflag
894 && new.c_oflag
== settings
->main
.c_oflag
895 && new.c_cflag
== settings
->main
.c_cflag
896 && new.c_lflag
== settings
->main
.c_lflag
897 && memcmp (new.c_cc
, settings
->main
.c_cc
, NCCS
) == 0)
904 /* We have survived the tempest. */
911 static int old_fcntl_owner
[FD_SETSIZE
];
912 #endif /* F_SETOWN */
914 /* This may also be defined in stdio,
915 but if so, this does no harm,
916 and using the same name avoids wasting the other one's space. */
919 unsigned char _sobuf
[BUFSIZ
+8];
924 /* Initialize the terminal mode on all tty devices that are currently
928 init_all_sys_modes (void)
930 struct tty_display_info
*tty
;
931 for (tty
= tty_list
; tty
; tty
= tty
->next
)
932 init_sys_modes (tty
);
935 /* Initialize the terminal mode on the given tty device. */
938 init_sys_modes (struct tty_display_info
*tty_out
)
940 struct emacs_tty tty
;
941 Lisp_Object terminal
;
943 Vtty_erase_char
= Qnil
;
948 if (!tty_out
->output
)
949 return; /* The tty is suspended. */
951 narrow_foreground_group (fileno (tty_out
->input
));
953 if (! tty_out
->old_tty
)
954 tty_out
->old_tty
= xmalloc (sizeof *tty_out
->old_tty
);
956 emacs_get_tty (fileno (tty_out
->input
), tty_out
->old_tty
);
958 tty
= *tty_out
->old_tty
;
960 #if !defined (DOS_NT)
961 XSETINT (Vtty_erase_char
, tty
.main
.c_cc
[VERASE
]);
963 tty
.main
.c_iflag
|= (IGNBRK
); /* Ignore break condition */
964 tty
.main
.c_iflag
&= ~ICRNL
; /* Disable map of CR to NL on input */
965 #ifdef INLCR /* I'm just being cautious,
966 since I can't check how widespread INLCR is--rms. */
967 tty
.main
.c_iflag
&= ~INLCR
; /* Disable map of NL to CR on input */
970 tty
.main
.c_iflag
&= ~ISTRIP
; /* don't strip 8th bit on input */
972 tty
.main
.c_lflag
&= ~ECHO
; /* Disable echo */
973 tty
.main
.c_lflag
&= ~ICANON
; /* Disable erase/kill processing */
975 tty
.main
.c_lflag
&= ~IEXTEN
; /* Disable other editing characters. */
977 tty
.main
.c_lflag
|= ISIG
; /* Enable signals */
978 if (tty_out
->flow_control
)
980 tty
.main
.c_iflag
|= IXON
; /* Enable start/stop output control */
982 tty
.main
.c_iflag
&= ~IXANY
;
986 tty
.main
.c_iflag
&= ~IXON
; /* Disable start/stop output control */
987 tty
.main
.c_oflag
&= ~ONLCR
; /* Disable map of NL to CR-NL
989 tty
.main
.c_oflag
&= ~TAB3
; /* Disable tab expansion */
991 if (tty_out
->meta_key
)
993 tty
.main
.c_cflag
|= CS8
; /* allow 8th bit on input */
994 tty
.main
.c_cflag
&= ~PARENB
;/* Don't check parity */
998 XSETTERMINAL(terminal
, tty_out
->terminal
);
999 if (!NILP (Fcontrolling_tty_p (terminal
)))
1001 tty
.main
.c_cc
[VINTR
] = quit_char
; /* C-g (usually) gives SIGINT */
1002 /* Set up C-g for both SIGQUIT and SIGINT.
1003 We don't know which we will get, but we handle both alike
1004 so which one it really gives us does not matter. */
1005 tty
.main
.c_cc
[VQUIT
] = quit_char
;
1009 /* We normally don't get interrupt or quit signals from tty
1010 devices other than our controlling terminal; therefore,
1011 we must handle C-g as normal input. Unfortunately, this
1012 means that the interrupt and quit feature must be
1013 disabled on secondary ttys, or we would not even see the
1016 Note that even though emacsclient could have special code
1017 to pass SIGINT to Emacs, we should _not_ enable
1018 interrupt/quit keys for emacsclient frames. This means
1019 that we can't break out of loops in C code from a
1020 secondary tty frame, but we can always decide what
1021 display the C-g came from, which is more important from a
1022 usability point of view. (Consider the case when two
1023 people work together using the same Emacs instance.) */
1024 tty
.main
.c_cc
[VINTR
] = CDISABLE
;
1025 tty
.main
.c_cc
[VQUIT
] = CDISABLE
;
1027 tty
.main
.c_cc
[VMIN
] = 1; /* Input should wait for at least 1 char */
1028 tty
.main
.c_cc
[VTIME
] = 0; /* no matter how long that takes. */
1030 tty
.main
.c_cc
[VSWTCH
] = CDISABLE
; /* Turn off shell layering use
1035 tty
.main
.c_cc
[VSUSP
] = CDISABLE
; /* Turn off handling of C-z. */
1038 tty
.main
.c_cc
[V_DSUSP
] = CDISABLE
; /* Turn off handling of C-y. */
1039 #endif /* V_DSUSP */
1040 #ifdef VDSUSP /* Some systems have VDSUSP, some have V_DSUSP. */
1041 tty
.main
.c_cc
[VDSUSP
] = CDISABLE
;
1044 tty
.main
.c_cc
[VLNEXT
] = CDISABLE
;
1047 tty
.main
.c_cc
[VREPRINT
] = CDISABLE
;
1048 #endif /* VREPRINT */
1050 tty
.main
.c_cc
[VWERASE
] = CDISABLE
;
1051 #endif /* VWERASE */
1053 tty
.main
.c_cc
[VDISCARD
] = CDISABLE
;
1054 #endif /* VDISCARD */
1056 if (tty_out
->flow_control
)
1059 tty
.main
.c_cc
[VSTART
] = '\021';
1062 tty
.main
.c_cc
[VSTOP
] = '\023';
1068 tty
.main
.c_cc
[VSTART
] = CDISABLE
;
1071 tty
.main
.c_cc
[VSTOP
] = CDISABLE
;
1076 tty
.main
.c_cc
[VSTRT
] = CDISABLE
;
1077 tty
.main
.c_cc
[VSTOP
] = CDISABLE
;
1078 tty
.main
.c_cc
[VSUSP
] = CDISABLE
;
1079 tty
.main
.c_cc
[VDSUSP
] = CDISABLE
;
1080 if (tty_out
->flow_control
)
1083 tty
.main
.c_cc
[VSTART
] = '\021';
1086 tty
.main
.c_cc
[VSTOP
] = '\023';
1089 /* Also, PTY overloads NUL and BREAK.
1090 don't ignore break, but don't signal either, so it looks like NUL.
1091 This really serves a purpose only if running in an XTERM window
1092 or via TELNET or the like, but does no harm elsewhere. */
1093 tty
.main
.c_iflag
&= ~IGNBRK
;
1094 tty
.main
.c_iflag
&= ~BRKINT
;
1096 #endif /* not DOS_NT */
1098 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida, MW Aug 1993 */
1099 if (!tty_out
->term_initted
)
1100 internal_terminal_init ();
1101 dos_ttraw (tty_out
);
1104 emacs_set_tty (fileno (tty_out
->input
), &tty
, 0);
1106 /* This code added to insure that, if flow-control is not to be used,
1107 we have an unlocked terminal at the start. */
1110 if (!tty_out
->flow_control
) ioctl (fileno (tty_out
->input
), TCXONC
, 1);
1113 if (!tty_out
->flow_control
) ioctl (fileno (tty_out
->input
), TIOCSTART
, 0);
1116 #if !defined (DOS_NT)
1118 if (!tty_out
->flow_control
) tcflow (fileno (tty_out
->input
), TCOON
);
1123 if (interrupt_input
)
1125 old_fcntl_owner
[fileno (tty_out
->input
)] =
1126 fcntl (fileno (tty_out
->input
), F_GETOWN
, 0);
1127 fcntl (fileno (tty_out
->input
), F_SETOWN
, getpid ());
1128 init_sigio (fileno (tty_out
->input
));
1130 if (gpm_tty
== tty_out
)
1132 /* Arrange for mouse events to give us SIGIO signals. */
1133 fcntl (gpm_fd
, F_SETOWN
, getpid ());
1134 fcntl (gpm_fd
, F_SETFL
, fcntl (gpm_fd
, F_GETFL
, 0) | O_NONBLOCK
);
1135 init_sigio (gpm_fd
);
1137 #endif /* HAVE_GPM */
1139 #endif /* F_GETOWN */
1142 /* This symbol is defined on recent USG systems.
1143 Someone says without this call USG won't really buffer the file
1144 even with a call to setbuf. */
1145 setvbuf (tty_out
->output
, (char *) _sobuf
, _IOFBF
, sizeof _sobuf
);
1147 setbuf (tty_out
->output
, (char *) _sobuf
);
1150 if (tty_out
->terminal
->set_terminal_modes_hook
)
1151 tty_out
->terminal
->set_terminal_modes_hook (tty_out
->terminal
);
1153 if (!tty_out
->term_initted
)
1155 Lisp_Object tail
, frame
;
1156 FOR_EACH_FRAME (tail
, frame
)
1158 /* XXX This needs to be revised. */
1159 if (FRAME_TERMCAP_P (XFRAME (frame
))
1160 && FRAME_TTY (XFRAME (frame
)) == tty_out
)
1161 init_frame_faces (XFRAME (frame
));
1165 if (tty_out
->term_initted
&& no_redraw_on_reenter
)
1167 /* We used to call "direct_output_forward_char(0)" here,
1168 but it's not clear why, since it may not do anything anyway. */
1172 Lisp_Object tail
, frame
;
1174 FOR_EACH_FRAME (tail
, frame
)
1176 if ((FRAME_TERMCAP_P (XFRAME (frame
))
1177 || FRAME_MSDOS_P (XFRAME (frame
)))
1178 && FRAME_TTY (XFRAME (frame
)) == tty_out
)
1179 FRAME_GARBAGED_P (XFRAME (frame
)) = 1;
1183 tty_out
->term_initted
= 1;
1186 /* Return true if safe to use tabs in output.
1187 At the time this is called, init_sys_modes has not been done yet. */
1190 tabs_safe_p (int fd
)
1192 struct emacs_tty etty
;
1194 emacs_get_tty (fd
, &etty
);
1197 return ((etty
.main
.c_oflag
& TABDLY
) != TAB3
);
1198 #else /* not TABDLY */
1200 #endif /* not TABDLY */
1206 /* Discard echoing. */
1209 suppress_echo_on_tty (int fd
)
1211 struct emacs_tty etty
;
1213 emacs_get_tty (fd
, &etty
);
1215 /* Set raw input mode. */
1218 etty
.main
.c_lflag
&= ~ICANON
; /* Disable buffering */
1219 etty
.main
.c_lflag
&= ~ECHO
; /* Disable echoing */
1220 #endif /* ! WINDOWSNT */
1221 emacs_set_tty (fd
, &etty
, 0);
1224 /* Get terminal size from system.
1225 Store number of lines into *HEIGHTP and width into *WIDTHP.
1226 We store 0 if there's no valid information. */
1229 get_tty_size (int fd
, int *widthp
, int *heightp
)
1231 #if defined TIOCGWINSZ
1234 struct winsize size
;
1236 if (ioctl (fd
, TIOCGWINSZ
, &size
) == -1)
1237 *widthp
= *heightp
= 0;
1240 *widthp
= size
.ws_col
;
1241 *heightp
= size
.ws_row
;
1244 #elif defined TIOCGSIZE
1246 /* SunOS - style. */
1247 struct ttysize size
;
1249 if (ioctl (fd
, TIOCGSIZE
, &size
) == -1)
1250 *widthp
= *heightp
= 0;
1253 *widthp
= size
.ts_cols
;
1254 *heightp
= size
.ts_lines
;
1257 #elif defined WINDOWSNT
1259 CONSOLE_SCREEN_BUFFER_INFO info
;
1260 if (GetConsoleScreenBufferInfo (GetStdHandle (STD_OUTPUT_HANDLE
), &info
))
1262 *widthp
= info
.srWindow
.Right
- info
.srWindow
.Left
+ 1;
1263 *heightp
= info
.srWindow
.Bottom
- info
.srWindow
.Top
+ 1;
1266 *widthp
= *heightp
= 0;
1270 *widthp
= ScreenCols ();
1271 *heightp
= ScreenRows ();
1273 #else /* system doesn't know size */
1281 /* Set the logical window size associated with descriptor FD
1282 to HEIGHT and WIDTH. This is used mainly with ptys.
1283 Return a negative value on failure. */
1286 set_window_size (int fd
, int height
, int width
)
1291 struct winsize size
;
1292 size
.ws_row
= height
;
1293 size
.ws_col
= width
;
1295 return ioctl (fd
, TIOCSWINSZ
, &size
);
1300 /* SunOS - style. */
1301 struct ttysize size
;
1302 size
.ts_lines
= height
;
1303 size
.ts_cols
= width
;
1305 return ioctl (fd
, TIOCGSIZE
, &size
);
1308 #endif /* not SunOS-style */
1309 #endif /* not BSD-style */
1314 /* Prepare all terminal devices for exiting Emacs. */
1317 reset_all_sys_modes (void)
1319 struct tty_display_info
*tty
;
1320 for (tty
= tty_list
; tty
; tty
= tty
->next
)
1321 reset_sys_modes (tty
);
1324 /* Prepare the terminal for closing it; move the cursor to the
1325 bottom of the frame, turn off interrupt-driven I/O, etc. */
1328 reset_sys_modes (struct tty_display_info
*tty_out
)
1335 if (!tty_out
->term_initted
)
1338 if (!tty_out
->output
)
1339 return; /* The tty is suspended. */
1341 /* Go to and clear the last line of the terminal. */
1343 cmgoto (tty_out
, FrameRows (tty_out
) - 1, 0);
1345 /* Code adapted from tty_clear_end_of_line. */
1346 if (tty_out
->TS_clr_line
)
1348 emacs_tputs (tty_out
, tty_out
->TS_clr_line
, 1, cmputc
);
1351 { /* have to do it the hard way */
1353 tty_turn_off_insert (tty_out
);
1355 for (i
= cursorX (tty_out
); i
< FrameCols (tty_out
) - 1; i
++)
1357 fputc (' ', tty_out
->output
);
1361 cmgoto (tty_out
, FrameRows (tty_out
) - 1, 0);
1362 fflush (tty_out
->output
);
1364 if (tty_out
->terminal
->reset_terminal_modes_hook
)
1365 tty_out
->terminal
->reset_terminal_modes_hook (tty_out
->terminal
);
1367 /* Avoid possible loss of output when changing terminal modes. */
1368 while (fdatasync (fileno (tty_out
->output
)) != 0 && errno
== EINTR
)
1373 if (interrupt_input
)
1375 reset_sigio (fileno (tty_out
->input
));
1376 fcntl (fileno (tty_out
->input
), F_SETOWN
,
1377 old_fcntl_owner
[fileno (tty_out
->input
)]);
1379 #endif /* F_SETOWN */
1380 fcntl (fileno (tty_out
->input
), F_SETFL
,
1381 fcntl (fileno (tty_out
->input
), F_GETFL
, 0) & ~O_NONBLOCK
);
1384 if (tty_out
->old_tty
)
1385 while (emacs_set_tty (fileno (tty_out
->input
),
1386 tty_out
->old_tty
, 0) < 0 && errno
== EINTR
)
1389 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */
1393 widen_foreground_group (fileno (tty_out
->input
));
1398 /* Set up the proper status flags for use of a pty. */
1403 /* I'm told that TOICREMOTE does not mean control chars
1404 "can't be sent" but rather that they don't have
1405 input-editing or signaling effects.
1406 That should be good, because we have other ways
1407 to do those things in Emacs.
1408 However, telnet mode seems not to work on 4.2.
1409 So TIOCREMOTE is turned off now. */
1411 /* Under hp-ux, if TIOCREMOTE is turned on, some calls
1412 will hang. In particular, the "timeout" feature (which
1413 causes a read to return if there is no data available)
1414 does this. Also it is known that telnet mode will hang
1415 in such a way that Emacs must be stopped (perhaps this
1416 is the same problem).
1418 If TIOCREMOTE is turned off, then there is a bug in
1419 hp-ux which sometimes loses data. Apparently the
1420 code which blocks the master process when the internal
1421 buffer fills up does not work. Other than this,
1422 though, everything else seems to work fine.
1424 Since the latter lossage is more benign, we may as well
1425 lose that way. -- cph */
1427 #if defined (UNIX98_PTYS)
1430 ioctl (fd
, FIONBIO
, &on
);
1435 #endif /* HAVE_PTYS */
1438 init_system_name (void)
1442 /* Set system-name to nil so that the build is deterministic. */
1443 Vsystem_name
= Qnil
;
1446 char *hostname_alloc
= NULL
;
1448 #ifndef HAVE_GETHOSTNAME
1451 hostname
= uts
.nodename
;
1452 #else /* HAVE_GETHOSTNAME */
1453 char hostname_buf
[256];
1454 ptrdiff_t hostname_size
= sizeof hostname_buf
;
1455 hostname
= hostname_buf
;
1457 /* Try to get the host name; if the buffer is too short, try
1458 again. Apparently, the only indication gethostname gives of
1459 whether the buffer was large enough is the presence or absence
1460 of a '\0' in the string. Eech. */
1463 gethostname (hostname
, hostname_size
- 1);
1464 hostname
[hostname_size
- 1] = '\0';
1466 /* Was the buffer large enough for the '\0'? */
1467 if (strlen (hostname
) < hostname_size
- 1)
1470 hostname
= hostname_alloc
= xpalloc (hostname_alloc
, &hostname_size
, 1,
1471 min (PTRDIFF_MAX
, SIZE_MAX
), 1);
1473 #endif /* HAVE_GETHOSTNAME */
1475 for (p
= hostname
; *p
; p
++)
1476 if (*p
== ' ' || *p
== '\t')
1478 if (! (STRINGP (Vsystem_name
) && SBYTES (Vsystem_name
) == p
- hostname
1479 && strcmp (SSDATA (Vsystem_name
), hostname
) == 0))
1480 Vsystem_name
= build_string (hostname
);
1481 xfree (hostname_alloc
);
1484 sigset_t empty_mask
;
1486 static struct sigaction process_fatal_action
;
1489 emacs_sigaction_flags (void)
1492 /* SA_RESTART causes interruptible functions with timeouts (e.g.,
1493 'select') to reset their timeout on some platforms (e.g.,
1494 HP-UX 11), which is not what we want. Also, when Emacs is
1495 interactive, we don't want SA_RESTART because we need to poll
1496 for pending input so we need long-running syscalls to be interrupted
1497 after a signal that sets pending_signals.
1499 Non-interactive keyboard input goes through stdio, where we
1500 always want restartable system calls. */
1507 /* Store into *ACTION a signal action suitable for Emacs, with handler
1510 emacs_sigaction_init (struct sigaction
*action
, signal_handler_t handler
)
1512 sigemptyset (&action
->sa_mask
);
1514 /* When handling a signal, block nonfatal system signals that are caught
1515 by Emacs. This makes race conditions less likely. */
1516 sigaddset (&action
->sa_mask
, SIGALRM
);
1518 sigaddset (&action
->sa_mask
, SIGCHLD
);
1521 sigaddset (&action
->sa_mask
, SIGDANGER
);
1523 #ifdef PROFILER_CPU_SUPPORT
1524 sigaddset (&action
->sa_mask
, SIGPROF
);
1527 sigaddset (&action
->sa_mask
, SIGWINCH
);
1529 if (! noninteractive
)
1531 sigaddset (&action
->sa_mask
, SIGINT
);
1532 sigaddset (&action
->sa_mask
, SIGQUIT
);
1534 sigaddset (&action
->sa_mask
, SIGIO
);
1538 action
->sa_handler
= handler
;
1539 action
->sa_flags
= emacs_sigaction_flags ();
1542 #ifdef FORWARD_SIGNAL_TO_MAIN_THREAD
1543 static pthread_t main_thread
;
1546 /* SIG has arrived at the current process. Deliver it to the main
1547 thread, which should handle it with HANDLER.
1549 If we are on the main thread, handle the signal SIG with HANDLER.
1550 Otherwise, redirect the signal to the main thread, blocking it from
1551 this thread. POSIX says any thread can receive a signal that is
1552 associated with a process, process group, or asynchronous event.
1553 On GNU/Linux that is not true, but for other systems (FreeBSD at
1556 deliver_process_signal (int sig
, signal_handler_t handler
)
1558 /* Preserve errno, to avoid race conditions with signal handlers that
1559 might change errno. Races can occur even in single-threaded hosts. */
1560 int old_errno
= errno
;
1562 bool on_main_thread
= true;
1563 #ifdef FORWARD_SIGNAL_TO_MAIN_THREAD
1564 if (! pthread_equal (pthread_self (), main_thread
))
1567 sigemptyset (&blocked
);
1568 sigaddset (&blocked
, sig
);
1569 pthread_sigmask (SIG_BLOCK
, &blocked
, 0);
1570 pthread_kill (main_thread
, sig
);
1571 on_main_thread
= false;
1580 /* Static location to save a fatal backtrace in a thread.
1581 FIXME: If two subsidiary threads fail simultaneously, the resulting
1582 backtrace may be garbage. */
1583 enum { BACKTRACE_LIMIT_MAX
= 500 };
1584 static void *thread_backtrace_buffer
[BACKTRACE_LIMIT_MAX
+ 1];
1585 static int thread_backtrace_npointers
;
1587 /* SIG has arrived at the current thread.
1588 If we are on the main thread, handle the signal SIG with HANDLER.
1589 Otherwise, this is a fatal error in the handling thread. */
1591 deliver_thread_signal (int sig
, signal_handler_t handler
)
1593 int old_errno
= errno
;
1595 #ifdef FORWARD_SIGNAL_TO_MAIN_THREAD
1596 if (! pthread_equal (pthread_self (), main_thread
))
1598 thread_backtrace_npointers
1599 = backtrace (thread_backtrace_buffer
, BACKTRACE_LIMIT_MAX
);
1600 sigaction (sig
, &process_fatal_action
, 0);
1601 pthread_kill (main_thread
, sig
);
1603 /* Avoid further damage while the main thread is exiting. */
1605 sigsuspend (&empty_mask
);
1613 #if !HAVE_DECL_SYS_SIGLIST
1615 # ifdef _sys_siglist
1616 # define sys_siglist _sys_siglist
1617 # elif HAVE_DECL___SYS_SIGLIST
1618 # define sys_siglist __sys_siglist
1620 # define sys_siglist my_sys_siglist
1621 static char const *sys_siglist
[NSIG
];
1626 # define sys_siglist_entries _sys_nsig
1628 # define sys_siglist_entries NSIG
1631 /* Handle bus errors, invalid instruction, etc. */
1633 handle_fatal_signal (int sig
)
1635 terminate_due_to_signal (sig
, 40);
1639 deliver_fatal_signal (int sig
)
1641 deliver_process_signal (sig
, handle_fatal_signal
);
1645 deliver_fatal_thread_signal (int sig
)
1647 deliver_thread_signal (sig
, handle_fatal_signal
);
1650 static _Noreturn
void
1651 handle_arith_signal (int sig
)
1653 pthread_sigmask (SIG_SETMASK
, &empty_mask
, 0);
1654 xsignal0 (Qarith_error
);
1657 #if defined HAVE_STACK_OVERFLOW_HANDLING && !defined WINDOWSNT
1659 /* Alternate stack used by SIGSEGV handler below. */
1661 static unsigned char sigsegv_stack
[SIGSTKSZ
];
1664 /* Return true if SIGINFO indicates a stack overflow. */
1667 stack_overflow (siginfo_t
*siginfo
)
1669 if (!attempt_stack_overflow_recovery
)
1672 /* In theory, a more-accurate heuristic can be obtained by using
1673 GNU/Linux pthread_getattr_np along with POSIX pthread_attr_getstack
1674 and pthread_attr_getguardsize to find the location and size of the
1675 guard area. In practice, though, these functions are so hard to
1676 use reliably that they're not worth bothering with. E.g., see:
1677 https://sourceware.org/bugzilla/show_bug.cgi?id=16291
1678 Other operating systems also have problems, e.g., Solaris's
1679 stack_violation function is tailor-made for this problem, but it
1680 doesn't work on Solaris 11.2 x86-64 with a 32-bit executable.
1682 GNU libsigsegv is overkill for Emacs; otherwise it might be a
1688 /* The faulting address. */
1689 char *addr
= siginfo
->si_addr
;
1693 /* The known top and bottom of the stack. The actual stack may
1694 extend a bit beyond these boundaries. */
1695 char *bot
= stack_bottom
;
1696 char *top
= near_C_stack_top ();
1698 /* Log base 2 of the stack heuristic ratio. This ratio is the size
1699 of the known stack divided by the size of the guard area past the
1700 end of the stack top. The heuristic is that a bad address is
1701 considered to be a stack overflow if it occurs within
1702 stacksize>>LG_STACK_HEURISTIC bytes above the top of the known
1703 stack. This heuristic is not exactly correct but it's good
1704 enough in practice. */
1705 enum { LG_STACK_HEURISTIC
= 8 };
1708 return 0 <= addr
- top
&& addr
- top
< (top
- bot
) >> LG_STACK_HEURISTIC
;
1710 return 0 <= top
- addr
&& top
- addr
< (bot
- top
) >> LG_STACK_HEURISTIC
;
1714 /* Attempt to recover from SIGSEGV caused by C stack overflow. */
1717 handle_sigsegv (int sig
, siginfo_t
*siginfo
, void *arg
)
1719 /* Hard GC error may lead to stack overflow caused by
1720 too nested calls to mark_object. No way to survive. */
1721 bool fatal
= gc_in_progress
;
1723 #ifdef FORWARD_SIGNAL_TO_MAIN_THREAD
1724 if (!fatal
&& !pthread_equal (pthread_self (), main_thread
))
1728 if (!fatal
&& stack_overflow (siginfo
))
1729 siglongjmp (return_to_command_loop
, 1);
1731 /* Otherwise we can't do anything with this. */
1732 deliver_fatal_thread_signal (sig
);
1735 /* Return true if we have successfully set up SIGSEGV handler on alternate
1736 stack. Otherwise we just treat SIGSEGV among the rest of fatal signals. */
1741 struct sigaction sa
;
1744 ss
.ss_sp
= sigsegv_stack
;
1745 ss
.ss_size
= sizeof (sigsegv_stack
);
1747 if (sigaltstack (&ss
, NULL
) < 0)
1750 sigfillset (&sa
.sa_mask
);
1751 sa
.sa_sigaction
= handle_sigsegv
;
1752 sa
.sa_flags
= SA_SIGINFO
| SA_ONSTACK
| emacs_sigaction_flags ();
1753 return sigaction (SIGSEGV
, &sa
, NULL
) < 0 ? 0 : 1;
1756 #else /* not HAVE_STACK_OVERFLOW_HANDLING or WINDOWSNT */
1764 #endif /* HAVE_STACK_OVERFLOW_HANDLING && !WINDOWSNT */
1767 deliver_arith_signal (int sig
)
1769 deliver_thread_signal (sig
, handle_arith_signal
);
1774 /* Handler for SIGDANGER. */
1776 handle_danger_signal (int sig
)
1778 malloc_warning ("Operating system warns that virtual memory is running low.\n");
1780 /* It might be unsafe to call do_auto_save now. */
1781 force_auto_save_soon ();
1785 deliver_danger_signal (int sig
)
1787 deliver_process_signal (sig
, handle_danger_signal
);
1791 /* Treat SIG as a terminating signal, unless it is already ignored and
1792 we are in --batch mode. Among other things, this makes nohup work. */
1794 maybe_fatal_sig (int sig
)
1796 bool catch_sig
= !noninteractive
;
1799 struct sigaction old_action
;
1800 sigaction (sig
, 0, &old_action
);
1801 catch_sig
= old_action
.sa_handler
!= SIG_IGN
;
1804 sigaction (sig
, &process_fatal_action
, 0);
1808 init_signals (bool dumping
)
1810 struct sigaction thread_fatal_action
;
1811 struct sigaction action
;
1813 sigemptyset (&empty_mask
);
1815 #ifdef FORWARD_SIGNAL_TO_MAIN_THREAD
1816 main_thread
= pthread_self ();
1819 #if !HAVE_DECL_SYS_SIGLIST && !defined _sys_siglist
1822 sys_siglist
[SIGABRT
] = "Aborted";
1824 sys_siglist
[SIGAIO
] = "LAN I/O interrupt";
1826 sys_siglist
[SIGALRM
] = "Alarm clock";
1828 sys_siglist
[SIGBUS
] = "Bus error";
1831 sys_siglist
[SIGCHLD
] = "Child status changed";
1834 sys_siglist
[SIGCONT
] = "Continued";
1837 sys_siglist
[SIGDANGER
] = "Swap space dangerously low";
1840 sys_siglist
[SIGDGNOTIFY
] = "Notification message in queue";
1843 sys_siglist
[SIGEMT
] = "Emulation trap";
1845 sys_siglist
[SIGFPE
] = "Arithmetic exception";
1847 sys_siglist
[SIGFREEZE
] = "SIGFREEZE";
1850 sys_siglist
[SIGGRANT
] = "Monitor mode granted";
1852 sys_siglist
[SIGHUP
] = "Hangup";
1853 sys_siglist
[SIGILL
] = "Illegal instruction";
1854 sys_siglist
[SIGINT
] = "Interrupt";
1856 sys_siglist
[SIGIO
] = "I/O possible";
1859 sys_siglist
[SIGIOINT
] = "I/O intervention required";
1862 sys_siglist
[SIGIOT
] = "IOT trap";
1864 sys_siglist
[SIGKILL
] = "Killed";
1866 sys_siglist
[SIGLOST
] = "Resource lost";
1869 sys_siglist
[SIGLWP
] = "SIGLWP";
1872 sys_siglist
[SIGMSG
] = "Monitor mode data available";
1875 sys_siglist
[SIGWIND
] = "SIGPHONE";
1877 sys_siglist
[SIGPIPE
] = "Broken pipe";
1879 sys_siglist
[SIGPOLL
] = "Pollable event occurred";
1882 sys_siglist
[SIGPROF
] = "Profiling timer expired";
1885 sys_siglist
[SIGPTY
] = "PTY I/O interrupt";
1888 sys_siglist
[SIGPWR
] = "Power-fail restart";
1890 sys_siglist
[SIGQUIT
] = "Quit";
1892 sys_siglist
[SIGRETRACT
] = "Need to relinquish monitor mode";
1895 sys_siglist
[SIGSAK
] = "Secure attention";
1897 sys_siglist
[SIGSEGV
] = "Segmentation violation";
1899 sys_siglist
[SIGSOUND
] = "Sound completed";
1902 sys_siglist
[SIGSTOP
] = "Stopped (signal)";
1905 sys_siglist
[SIGSTP
] = "Stopped (user)";
1908 sys_siglist
[SIGSYS
] = "Bad argument to system call";
1910 sys_siglist
[SIGTERM
] = "Terminated";
1912 sys_siglist
[SIGTHAW
] = "SIGTHAW";
1915 sys_siglist
[SIGTRAP
] = "Trace/breakpoint trap";
1918 sys_siglist
[SIGTSTP
] = "Stopped (user)";
1921 sys_siglist
[SIGTTIN
] = "Stopped (tty input)";
1924 sys_siglist
[SIGTTOU
] = "Stopped (tty output)";
1927 sys_siglist
[SIGURG
] = "Urgent I/O condition";
1930 sys_siglist
[SIGUSR1
] = "User defined signal 1";
1933 sys_siglist
[SIGUSR2
] = "User defined signal 2";
1936 sys_siglist
[SIGVTALRM
] = "Virtual timer expired";
1939 sys_siglist
[SIGWAITING
] = "Process's LWPs are blocked";
1942 sys_siglist
[SIGWINCH
] = "Window size changed";
1945 sys_siglist
[SIGWIND
] = "SIGWIND";
1948 sys_siglist
[SIGXCPU
] = "CPU time limit exceeded";
1951 sys_siglist
[SIGXFSZ
] = "File size limit exceeded";
1954 #endif /* !HAVE_DECL_SYS_SIGLIST && !_sys_siglist */
1956 /* Don't alter signal handlers if dumping. On some machines,
1957 changing signal handlers sets static data that would make signals
1958 fail to work right when the dumped Emacs is run. */
1962 sigfillset (&process_fatal_action
.sa_mask
);
1963 process_fatal_action
.sa_handler
= deliver_fatal_signal
;
1964 process_fatal_action
.sa_flags
= emacs_sigaction_flags ();
1966 sigfillset (&thread_fatal_action
.sa_mask
);
1967 thread_fatal_action
.sa_handler
= deliver_fatal_thread_signal
;
1968 thread_fatal_action
.sa_flags
= process_fatal_action
.sa_flags
;
1970 /* SIGINT may need special treatment on MS-Windows. See
1971 http://lists.gnu.org/archive/html/emacs-devel/2010-09/msg01062.html
1972 Please update the doc of kill-emacs, kill-emacs-hook, and
1973 NEWS if you change this. */
1975 maybe_fatal_sig (SIGHUP
);
1976 maybe_fatal_sig (SIGINT
);
1977 maybe_fatal_sig (SIGTERM
);
1979 /* Emacs checks for write errors, so it can safely ignore SIGPIPE.
1980 However, in batch mode leave SIGPIPE alone, as that causes Emacs
1981 to behave more like typical batch applications do. */
1982 if (! noninteractive
)
1983 signal (SIGPIPE
, SIG_IGN
);
1985 sigaction (SIGQUIT
, &process_fatal_action
, 0);
1986 sigaction (SIGILL
, &thread_fatal_action
, 0);
1987 sigaction (SIGTRAP
, &thread_fatal_action
, 0);
1989 /* Typically SIGFPE is thread-specific and is fatal, like SIGILL.
1990 But on a non-IEEE host SIGFPE can come from a trap in the Lisp
1991 interpreter's floating point operations, so treat SIGFPE as an
1992 arith-error if it arises in the main thread. */
1993 if (IEEE_FLOATING_POINT
)
1994 sigaction (SIGFPE
, &thread_fatal_action
, 0);
1997 emacs_sigaction_init (&action
, deliver_arith_signal
);
1998 sigaction (SIGFPE
, &action
, 0);
2002 add_user_signal (SIGUSR1
, "sigusr1");
2005 add_user_signal (SIGUSR2
, "sigusr2");
2007 sigaction (SIGABRT
, &thread_fatal_action
, 0);
2009 sigaction (SIGPRE
, &thread_fatal_action
, 0);
2012 sigaction (SIGORE
, &thread_fatal_action
, 0);
2015 sigaction (SIGUME
, &thread_fatal_action
, 0);
2018 sigaction (SIGDLK
, &process_fatal_action
, 0);
2021 sigaction (SIGCPULIM
, &process_fatal_action
, 0);
2024 sigaction (SIGIOT
, &thread_fatal_action
, 0);
2027 sigaction (SIGEMT
, &thread_fatal_action
, 0);
2030 sigaction (SIGBUS
, &thread_fatal_action
, 0);
2032 if (!init_sigsegv ())
2033 sigaction (SIGSEGV
, &thread_fatal_action
, 0);
2035 sigaction (SIGSYS
, &thread_fatal_action
, 0);
2037 sigaction (SIGTERM
, &process_fatal_action
, 0);
2039 signal (SIGPROF
, SIG_IGN
);
2042 sigaction (SIGVTALRM
, &process_fatal_action
, 0);
2045 sigaction (SIGXCPU
, &process_fatal_action
, 0);
2048 sigaction (SIGXFSZ
, &process_fatal_action
, 0);
2052 /* This just means available memory is getting low. */
2053 emacs_sigaction_init (&action
, deliver_danger_signal
);
2054 sigaction (SIGDANGER
, &action
, 0);
2057 /* AIX-specific signals. */
2059 sigaction (SIGGRANT
, &process_fatal_action
, 0);
2062 sigaction (SIGMIGRATE
, &process_fatal_action
, 0);
2065 sigaction (SIGMSG
, &process_fatal_action
, 0);
2068 sigaction (SIGRETRACT
, &process_fatal_action
, 0);
2071 sigaction (SIGSAK
, &process_fatal_action
, 0);
2074 sigaction (SIGSOUND
, &process_fatal_action
, 0);
2077 sigaction (SIGTALRM
, &thread_fatal_action
, 0);
2087 /* Figure out how many bits the system's random number generator uses.
2088 `random' and `lrand48' are assumed to return 31 usable bits.
2089 BSD `rand' returns a 31 bit value but the low order bits are unusable;
2090 so we'll shift it and treat it like the 15-bit USG `rand'. */
2094 # define RAND_BITS 31
2095 # else /* !HAVE_RANDOM */
2096 # ifdef HAVE_LRAND48
2097 # define RAND_BITS 31
2098 # define random lrand48
2099 # else /* !HAVE_LRAND48 */
2100 # define RAND_BITS 15
2101 # if RAND_MAX == 32767
2102 # define random rand
2103 # else /* RAND_MAX != 32767 */
2104 # if RAND_MAX == 2147483647
2105 # define random() (rand () >> 16)
2106 # else /* RAND_MAX != 2147483647 */
2108 # define random rand
2110 # define random() (rand () >> 16)
2112 # endif /* RAND_MAX != 2147483647 */
2113 # endif /* RAND_MAX != 32767 */
2114 # endif /* !HAVE_LRAND48 */
2115 # endif /* !HAVE_RANDOM */
2116 #endif /* !RAND_BITS */
2119 typedef unsigned int random_seed
;
2120 static void set_random_seed (random_seed arg
) { srandom (arg
); }
2121 #elif defined HAVE_LRAND48
2122 /* Although srand48 uses a long seed, this is unsigned long to avoid
2123 undefined behavior on signed integer overflow in init_random. */
2124 typedef unsigned long int random_seed
;
2125 static void set_random_seed (random_seed arg
) { srand48 (arg
); }
2127 typedef unsigned int random_seed
;
2128 static void set_random_seed (random_seed arg
) { srand (arg
); }
2132 seed_random (void *seed
, ptrdiff_t seed_size
)
2134 random_seed arg
= 0;
2135 unsigned char *argp
= (unsigned char *) &arg
;
2136 unsigned char *seedp
= seed
;
2137 for (ptrdiff_t i
= 0; i
< seed_size
; i
++)
2138 argp
[i
% sizeof arg
] ^= seedp
[i
];
2139 set_random_seed (arg
);
2146 if (! (EQ (emacs_gnutls_global_init (), Qt
)
2147 && gnutls_rnd (GNUTLS_RND_NONCE
, &v
, sizeof v
) == 0))
2149 bool success
= false;
2151 int fd
= emacs_open ("/dev/urandom", O_RDONLY
| O_BINARY
, 0);
2154 success
= emacs_read (fd
, &v
, sizeof v
) == sizeof v
;
2158 success
= w32_init_random (&v
, sizeof v
) == 0;
2162 /* Fall back to current time value + PID. */
2163 struct timespec t
= current_timespec ();
2164 v
= getpid () ^ t
.tv_sec
^ t
.tv_nsec
;
2167 set_random_seed (v
);
2171 * Return a nonnegative random integer out of whatever we've got.
2172 * It contains enough bits to make a random (signed) Emacs fixnum.
2173 * This suffices even for a 64-bit architecture with a 15-bit rand.
2180 for (i
= 0; i
< (FIXNUM_BITS
+ RAND_BITS
- 1) / RAND_BITS
; i
++)
2181 val
= (random () ^ (val
<< RAND_BITS
)
2182 ^ (val
>> (BITS_PER_EMACS_INT
- RAND_BITS
)));
2183 val
^= val
>> (BITS_PER_EMACS_INT
- FIXNUM_BITS
);
2184 return val
& INTMASK
;
2187 #ifndef HAVE_SNPRINTF
2188 /* Approximate snprintf as best we can on ancient hosts that lack it. */
2190 snprintf (char *buf
, size_t bufsize
, char const *format
, ...)
2192 ptrdiff_t size
= min (bufsize
, PTRDIFF_MAX
);
2193 ptrdiff_t nbytes
= size
- 1;
2198 va_start (ap
, format
);
2199 nbytes
= doprnt (buf
, size
, format
, 0, ap
);
2203 if (nbytes
== size
- 1)
2205 /* Calculate the length of the string that would have been created
2206 had the buffer been large enough. */
2207 char stackbuf
[4000];
2209 ptrdiff_t bsize
= sizeof stackbuf
;
2210 va_start (ap
, format
);
2211 nbytes
= evxprintf (&b
, &bsize
, stackbuf
, -1, format
, ap
);
2217 if (INT_MAX
< nbytes
)
2230 /* If a backtrace is available, output the top lines of it to stderr.
2231 Do not output more than BACKTRACE_LIMIT or BACKTRACE_LIMIT_MAX lines.
2232 This function may be called from a signal handler, so it should
2233 not invoke async-unsafe functions like malloc.
2235 If BACKTRACE_LIMIT is -1, initialize tables that 'backtrace' uses
2236 but do not output anything. This avoids some problems that can
2237 otherwise occur if the malloc arena is corrupted before 'backtrace'
2238 is called, since 'backtrace' may call malloc if the tables are not
2241 If the static variable THREAD_BACKTRACE_NPOINTERS is nonzero, a
2242 fatal error has occurred in some other thread; generate a thread
2243 backtrace instead, ignoring BACKTRACE_LIMIT. */
2245 emacs_backtrace (int backtrace_limit
)
2247 void *main_backtrace_buffer
[BACKTRACE_LIMIT_MAX
+ 1];
2248 int bounded_limit
= min (backtrace_limit
, BACKTRACE_LIMIT_MAX
);
2252 if (thread_backtrace_npointers
)
2254 buffer
= thread_backtrace_buffer
;
2255 npointers
= thread_backtrace_npointers
;
2259 buffer
= main_backtrace_buffer
;
2261 /* Work around 'backtrace' bug; see Bug#19959 and glibc bug#18084. */
2262 if (bounded_limit
< 0)
2264 backtrace (buffer
, 1);
2268 npointers
= backtrace (buffer
, bounded_limit
+ 1);
2273 emacs_write (STDERR_FILENO
, "\nBacktrace:\n", 12);
2274 backtrace_symbols_fd (buffer
, npointers
, STDERR_FILENO
);
2275 if (bounded_limit
< npointers
)
2276 emacs_write (STDERR_FILENO
, "...\n", 4);
2284 terminate_due_to_signal (SIGABRT
, 40);
2288 /* Open FILE for Emacs use, using open flags OFLAG and mode MODE.
2289 Use binary I/O on systems that care about text vs binary I/O.
2290 Arrange for subprograms to not inherit the file descriptor.
2291 Prefer a method that is multithread-safe, if available.
2292 Do not fail merely because the open was interrupted by a signal.
2293 Allow the user to quit. */
2296 emacs_open (const char *file
, int oflags
, int mode
)
2299 if (! (oflags
& O_TEXT
))
2301 oflags
|= O_CLOEXEC
;
2302 while ((fd
= open (file
, oflags
, mode
)) < 0 && errno
== EINTR
)
2304 if (! O_CLOEXEC
&& 0 <= fd
)
2305 fcntl (fd
, F_SETFD
, FD_CLOEXEC
);
2309 /* Open FILE as a stream for Emacs use, with mode MODE.
2310 Act like emacs_open with respect to threads, signals, and quits. */
2313 emacs_fopen (char const *file
, char const *mode
)
2315 int fd
, omode
, oflags
;
2317 char const *m
= mode
;
2321 case 'r': omode
= O_RDONLY
; oflags
= 0; break;
2322 case 'w': omode
= O_WRONLY
; oflags
= O_CREAT
| O_TRUNC
; break;
2323 case 'a': omode
= O_WRONLY
; oflags
= O_CREAT
| O_APPEND
; break;
2324 default: emacs_abort ();
2330 case '+': omode
= O_RDWR
; break;
2331 case 'b': bflag
= O_BINARY
; break;
2332 case 't': bflag
= O_TEXT
; break;
2333 default: /* Ignore. */ break;
2336 fd
= emacs_open (file
, omode
| oflags
| bflag
, 0666);
2337 return fd
< 0 ? 0 : fdopen (fd
, mode
);
2340 /* Create a pipe for Emacs use. */
2343 emacs_pipe (int fd
[2])
2348 int result
= pipe2 (fd
, O_BINARY
| O_CLOEXEC
);
2349 if (! O_CLOEXEC
&& result
== 0)
2351 fcntl (fd
[0], F_SETFD
, FD_CLOEXEC
);
2352 fcntl (fd
[1], F_SETFD
, FD_CLOEXEC
);
2358 /* Approximate posix_close and POSIX_CLOSE_RESTART well enough for Emacs.
2359 For the background behind this mess, please see Austin Group defect 529
2360 <http://austingroupbugs.net/view.php?id=529>. */
2362 #ifndef POSIX_CLOSE_RESTART
2363 # define POSIX_CLOSE_RESTART 1
2365 posix_close (int fd
, int flag
)
2367 /* Only the POSIX_CLOSE_RESTART case is emulated. */
2368 eassert (flag
== POSIX_CLOSE_RESTART
);
2370 /* Things are tricky if close (fd) returns -1 with errno == EINTR
2371 on a system that does not define POSIX_CLOSE_RESTART.
2373 In this case, in some systems (e.g., GNU/Linux, AIX) FD is
2374 closed, and retrying the close could inadvertently close a file
2375 descriptor allocated by some other thread. In other systems
2376 (e.g., HP/UX) FD is not closed. And in still other systems
2377 (e.g., OS X, Solaris), maybe FD is closed, maybe not, and in a
2378 multithreaded program there can be no way to tell.
2380 So, in this case, pretend that the close succeeded. This works
2381 well on systems like GNU/Linux that close FD. Although it may
2382 leak a file descriptor on other systems, the leak is unlikely and
2383 it's better to leak than to close a random victim. */
2384 return close (fd
) == 0 || errno
== EINTR
? 0 : -1;
2388 /* Close FD, retrying if interrupted. If successful, return 0;
2389 otherwise, return -1 and set errno to a non-EINTR value. Consider
2390 an EINPROGRESS error to be successful, as that's merely a signal
2391 arriving. FD is always closed when this function returns, even
2394 Do not call this function if FD is nonnegative and might already be closed,
2395 as that might close an innocent victim opened by some other thread. */
2398 emacs_close (int fd
)
2402 int r
= posix_close (fd
, POSIX_CLOSE_RESTART
);
2405 if (!POSIX_CLOSE_RESTART
|| errno
!= EINTR
)
2407 eassert (errno
!= EBADF
|| fd
< 0);
2408 return errno
== EINPROGRESS
? 0 : r
;
2413 /* Maximum number of bytes to read or write in a single system call.
2414 This works around a serious bug in Linux kernels before 2.6.16; see
2415 <https://bugzilla.redhat.com/show_bug.cgi?format=multiple&id=612839>.
2416 It's likely to work around similar bugs in other operating systems, so do it
2417 on all platforms. Round INT_MAX down to a page size, with the conservative
2418 assumption that page sizes are at most 2**18 bytes (any kernel with a
2419 page size larger than that shouldn't have the bug). */
2420 #ifndef MAX_RW_COUNT
2421 #define MAX_RW_COUNT (INT_MAX >> 18 << 18)
2424 /* Read from FILEDESC to a buffer BUF with size NBYTE, retrying if interrupted.
2425 Return the number of bytes read, which might be less than NBYTE.
2426 On error, set errno and return -1. */
2428 emacs_read (int fildes
, void *buf
, ptrdiff_t nbyte
)
2432 /* There is no need to check against MAX_RW_COUNT, since no caller ever
2433 passes a size that large to emacs_read. */
2435 while ((rtnval
= read (fildes
, buf
, nbyte
)) == -1
2436 && (errno
== EINTR
))
2441 /* Write to FILEDES from a buffer BUF with size NBYTE, retrying if interrupted
2442 or if a partial write occurs. If interrupted, process pending
2443 signals if PROCESS SIGNALS. Return the number of bytes written, setting
2444 errno if this is less than NBYTE. */
2446 emacs_full_write (int fildes
, char const *buf
, ptrdiff_t nbyte
,
2447 bool process_signals
)
2449 ptrdiff_t bytes_written
= 0;
2453 ssize_t n
= write (fildes
, buf
, min (nbyte
, MAX_RW_COUNT
));
2459 /* I originally used `QUIT' but that might cause files to
2460 be truncated if you hit C-g in the middle of it. --Stef */
2461 if (process_signals
&& pending_signals
)
2462 process_pending_signals ();
2474 return bytes_written
;
2477 /* Write to FILEDES from a buffer BUF with size NBYTE, retrying if
2478 interrupted or if a partial write occurs. Return the number of
2479 bytes written, setting errno if this is less than NBYTE. */
2481 emacs_write (int fildes
, void const *buf
, ptrdiff_t nbyte
)
2483 return emacs_full_write (fildes
, buf
, nbyte
, 0);
2486 /* Like emacs_write, but also process pending signals if interrupted. */
2488 emacs_write_sig (int fildes
, void const *buf
, ptrdiff_t nbyte
)
2490 return emacs_full_write (fildes
, buf
, nbyte
, 1);
2493 /* Write a diagnostic to standard error that contains MESSAGE and a
2494 string derived from errno. Preserve errno. Do not buffer stderr.
2495 Do not process pending signals if interrupted. */
2497 emacs_perror (char const *message
)
2500 char const *error_string
= strerror (err
);
2501 char const *command
= (initial_argv
&& initial_argv
[0]
2502 ? initial_argv
[0] : "emacs");
2503 /* Write it out all at once, if it's short; this is less likely to
2504 be interleaved with other output. */
2506 int nbytes
= snprintf (buf
, sizeof buf
, "%s: %s: %s\n",
2507 command
, message
, error_string
);
2508 if (0 <= nbytes
&& nbytes
< BUFSIZ
)
2509 emacs_write (STDERR_FILENO
, buf
, nbytes
);
2512 emacs_write (STDERR_FILENO
, command
, strlen (command
));
2513 emacs_write (STDERR_FILENO
, ": ", 2);
2514 emacs_write (STDERR_FILENO
, message
, strlen (message
));
2515 emacs_write (STDERR_FILENO
, ": ", 2);
2516 emacs_write (STDERR_FILENO
, error_string
, strlen (error_string
));
2517 emacs_write (STDERR_FILENO
, "\n", 1);
2522 /* Return a struct timeval that is roughly equivalent to T.
2523 Use the least timeval not less than T.
2524 Return an extremal value if the result would overflow. */
2526 make_timeval (struct timespec t
)
2529 tv
.tv_sec
= t
.tv_sec
;
2530 tv
.tv_usec
= t
.tv_nsec
/ 1000;
2532 if (t
.tv_nsec
% 1000 != 0)
2534 if (tv
.tv_usec
< 999999)
2536 else if (tv
.tv_sec
< TYPE_MAXIMUM (time_t))
2546 /* Set the access and modification time stamps of FD (a.k.a. FILE) to be
2547 ATIME and MTIME, respectively.
2548 FD must be either negative -- in which case it is ignored --
2549 or a file descriptor that is open on FILE.
2550 If FD is nonnegative, then FILE can be NULL. */
2552 set_file_times (int fd
, const char *filename
,
2553 struct timespec atime
, struct timespec mtime
)
2555 struct timespec timespec
[2];
2556 timespec
[0] = atime
;
2557 timespec
[1] = mtime
;
2558 return fdutimens (fd
, filename
, timespec
);
2561 /* Like strsignal, except async-signal-safe, and this function typically
2562 returns a string in the C locale rather than the current locale. */
2564 safe_strsignal (int code
)
2566 char const *signame
= 0;
2568 if (0 <= code
&& code
< sys_siglist_entries
)
2569 signame
= sys_siglist
[code
];
2571 signame
= "Unknown signal";
2577 /* For make-serial-process */
2579 serial_open (Lisp_Object port
)
2581 int fd
= emacs_open (SSDATA (port
), O_RDWR
| O_NOCTTY
| O_NONBLOCK
, 0);
2583 report_file_error ("Opening serial port", port
);
2585 ioctl (fd
, TIOCEXCL
, (char *) 0);
2591 #if !defined (HAVE_CFMAKERAW)
2592 /* Workaround for targets which are missing cfmakeraw. */
2593 /* Pasted from man page. */
2595 cfmakeraw (struct termios
*termios_p
)
2597 termios_p
->c_iflag
&= ~(IGNBRK
|BRKINT
|PARMRK
|ISTRIP
|INLCR
|IGNCR
|ICRNL
|IXON
);
2598 termios_p
->c_oflag
&= ~OPOST
;
2599 termios_p
->c_lflag
&= ~(ECHO
|ECHONL
|ICANON
|ISIG
|IEXTEN
);
2600 termios_p
->c_cflag
&= ~(CSIZE
|PARENB
);
2601 termios_p
->c_cflag
|= CS8
;
2603 #endif /* !defined (HAVE_CFMAKERAW */
2605 #if !defined (HAVE_CFSETSPEED)
2606 /* Workaround for targets which are missing cfsetspeed. */
2608 cfsetspeed (struct termios
*termios_p
, speed_t vitesse
)
2610 return (cfsetispeed (termios_p
, vitesse
)
2611 + cfsetospeed (termios_p
, vitesse
));
2615 /* For serial-process-configure */
2617 serial_configure (struct Lisp_Process
*p
,
2618 Lisp_Object contact
)
2620 Lisp_Object childp2
= Qnil
;
2621 Lisp_Object tem
= Qnil
;
2622 struct termios attr
;
2624 char summary
[4] = "???"; /* This usually becomes "8N1". */
2626 childp2
= Fcopy_sequence (p
->childp
);
2628 /* Read port attributes and prepare default configuration. */
2629 err
= tcgetattr (p
->outfd
, &attr
);
2631 report_file_error ("Failed tcgetattr", Qnil
);
2633 #if defined (CLOCAL)
2634 attr
.c_cflag
|= CLOCAL
;
2637 attr
.c_cflag
|= CREAD
;
2640 /* Configure speed. */
2641 if (!NILP (Fplist_member (contact
, QCspeed
)))
2642 tem
= Fplist_get (contact
, QCspeed
);
2644 tem
= Fplist_get (p
->childp
, QCspeed
);
2646 err
= cfsetspeed (&attr
, XINT (tem
));
2648 report_file_error ("Failed cfsetspeed", tem
);
2649 childp2
= Fplist_put (childp2
, QCspeed
, tem
);
2651 /* Configure bytesize. */
2652 if (!NILP (Fplist_member (contact
, QCbytesize
)))
2653 tem
= Fplist_get (contact
, QCbytesize
);
2655 tem
= Fplist_get (p
->childp
, QCbytesize
);
2657 tem
= make_number (8);
2659 if (XINT (tem
) != 7 && XINT (tem
) != 8)
2660 error (":bytesize must be nil (8), 7, or 8");
2661 summary
[0] = XINT (tem
) + '0';
2662 #if defined (CSIZE) && defined (CS7) && defined (CS8)
2663 attr
.c_cflag
&= ~CSIZE
;
2664 attr
.c_cflag
|= ((XINT (tem
) == 7) ? CS7
: CS8
);
2666 /* Don't error on bytesize 8, which should be set by cfmakeraw. */
2667 if (XINT (tem
) != 8)
2668 error ("Bytesize cannot be changed");
2670 childp2
= Fplist_put (childp2
, QCbytesize
, tem
);
2672 /* Configure parity. */
2673 if (!NILP (Fplist_member (contact
, QCparity
)))
2674 tem
= Fplist_get (contact
, QCparity
);
2676 tem
= Fplist_get (p
->childp
, QCparity
);
2677 if (!NILP (tem
) && !EQ (tem
, Qeven
) && !EQ (tem
, Qodd
))
2678 error (":parity must be nil (no parity), `even', or `odd'");
2679 #if defined (PARENB) && defined (PARODD) && defined (IGNPAR) && defined (INPCK)
2680 attr
.c_cflag
&= ~(PARENB
| PARODD
);
2681 attr
.c_iflag
&= ~(IGNPAR
| INPCK
);
2686 else if (EQ (tem
, Qeven
))
2689 attr
.c_cflag
|= PARENB
;
2690 attr
.c_iflag
|= (IGNPAR
| INPCK
);
2692 else if (EQ (tem
, Qodd
))
2695 attr
.c_cflag
|= (PARENB
| PARODD
);
2696 attr
.c_iflag
|= (IGNPAR
| INPCK
);
2699 /* Don't error on no parity, which should be set by cfmakeraw. */
2701 error ("Parity cannot be configured");
2703 childp2
= Fplist_put (childp2
, QCparity
, tem
);
2705 /* Configure stopbits. */
2706 if (!NILP (Fplist_member (contact
, QCstopbits
)))
2707 tem
= Fplist_get (contact
, QCstopbits
);
2709 tem
= Fplist_get (p
->childp
, QCstopbits
);
2711 tem
= make_number (1);
2713 if (XINT (tem
) != 1 && XINT (tem
) != 2)
2714 error (":stopbits must be nil (1 stopbit), 1, or 2");
2715 summary
[2] = XINT (tem
) + '0';
2716 #if defined (CSTOPB)
2717 attr
.c_cflag
&= ~CSTOPB
;
2718 if (XINT (tem
) == 2)
2719 attr
.c_cflag
|= CSTOPB
;
2721 /* Don't error on 1 stopbit, which should be set by cfmakeraw. */
2722 if (XINT (tem
) != 1)
2723 error ("Stopbits cannot be configured");
2725 childp2
= Fplist_put (childp2
, QCstopbits
, tem
);
2727 /* Configure flowcontrol. */
2728 if (!NILP (Fplist_member (contact
, QCflowcontrol
)))
2729 tem
= Fplist_get (contact
, QCflowcontrol
);
2731 tem
= Fplist_get (p
->childp
, QCflowcontrol
);
2732 if (!NILP (tem
) && !EQ (tem
, Qhw
) && !EQ (tem
, Qsw
))
2733 error (":flowcontrol must be nil (no flowcontrol), `hw', or `sw'");
2734 #if defined (CRTSCTS)
2735 attr
.c_cflag
&= ~CRTSCTS
;
2737 #if defined (CNEW_RTSCTS)
2738 attr
.c_cflag
&= ~CNEW_RTSCTS
;
2740 #if defined (IXON) && defined (IXOFF)
2741 attr
.c_iflag
&= ~(IXON
| IXOFF
);
2745 /* Already configured. */
2747 else if (EQ (tem
, Qhw
))
2749 #if defined (CRTSCTS)
2750 attr
.c_cflag
|= CRTSCTS
;
2751 #elif defined (CNEW_RTSCTS)
2752 attr
.c_cflag
|= CNEW_RTSCTS
;
2754 error ("Hardware flowcontrol (RTS/CTS) not supported");
2757 else if (EQ (tem
, Qsw
))
2759 #if defined (IXON) && defined (IXOFF)
2760 attr
.c_iflag
|= (IXON
| IXOFF
);
2762 error ("Software flowcontrol (XON/XOFF) not supported");
2765 childp2
= Fplist_put (childp2
, QCflowcontrol
, tem
);
2767 /* Activate configuration. */
2768 err
= tcsetattr (p
->outfd
, TCSANOW
, &attr
);
2770 report_file_error ("Failed tcsetattr", Qnil
);
2772 childp2
= Fplist_put (childp2
, QCsummary
, build_string (summary
));
2773 pset_childp (p
, childp2
);
2775 #endif /* not DOS_NT */
2777 /* System depended enumeration of and access to system processes a-la ps(1). */
2781 /* Process enumeration and access via /proc. */
2784 list_system_processes (void)
2786 Lisp_Object procdir
, match
, proclist
, next
;
2789 /* For every process on the system, there's a directory in the
2790 "/proc" pseudo-directory whose name is the numeric ID of that
2792 procdir
= build_string ("/proc");
2793 match
= build_string ("[0-9]+");
2794 proclist
= directory_files_internal (procdir
, Qnil
, match
, Qt
, 0, Qnil
);
2796 /* `proclist' gives process IDs as strings. Destructively convert
2797 each string into a number. */
2798 for (tail
= proclist
; CONSP (tail
); tail
= next
)
2801 XSETCAR (tail
, Fstring_to_number (XCAR (tail
), Qnil
));
2804 /* directory_files_internal returns the files in reverse order; undo
2806 proclist
= Fnreverse (proclist
);
2810 #elif defined DARWIN_OS || defined __FreeBSD__
2813 list_system_processes (void)
2816 int mib
[] = {CTL_KERN
, KERN_PROC
, KERN_PROC_ALL
};
2818 int mib
[] = {CTL_KERN
, KERN_PROC
, KERN_PROC_PROC
};
2821 struct kinfo_proc
*procs
;
2824 Lisp_Object proclist
= Qnil
;
2826 if (sysctl (mib
, 3, NULL
, &len
, NULL
, 0) != 0)
2829 procs
= xmalloc (len
);
2830 if (sysctl (mib
, 3, procs
, &len
, NULL
, 0) != 0)
2836 len
/= sizeof (struct kinfo_proc
);
2837 for (i
= 0; i
< len
; i
++)
2840 proclist
= Fcons (make_fixnum_or_float (procs
[i
].kp_proc
.p_pid
), proclist
);
2842 proclist
= Fcons (make_fixnum_or_float (procs
[i
].ki_pid
), proclist
);
2851 /* The WINDOWSNT implementation is in w32.c.
2852 The MSDOS implementation is in dosfns.c. */
2853 #elif !defined (WINDOWSNT) && !defined (MSDOS)
2856 list_system_processes (void)
2861 #endif /* !defined (WINDOWSNT) */
2863 #if defined GNU_LINUX && defined HAVE_LONG_LONG_INT
2864 static struct timespec
2865 time_from_jiffies (unsigned long long tval
, long hz
)
2867 unsigned long long s
= tval
/ hz
;
2868 unsigned long long frac
= tval
% hz
;
2871 if (TYPE_MAXIMUM (time_t) < s
)
2873 if (LONG_MAX
- 1 <= ULLONG_MAX
/ TIMESPEC_RESOLUTION
2874 || frac
<= ULLONG_MAX
/ TIMESPEC_RESOLUTION
)
2875 ns
= frac
* TIMESPEC_RESOLUTION
/ hz
;
2878 /* This is reachable only in the unlikely case that HZ * HZ
2879 exceeds ULLONG_MAX. It calculates an approximation that is
2880 guaranteed to be in range. */
2881 long hz_per_ns
= (hz
/ TIMESPEC_RESOLUTION
2882 + (hz
% TIMESPEC_RESOLUTION
!= 0));
2883 ns
= frac
/ hz_per_ns
;
2886 return make_timespec (s
, ns
);
2890 ltime_from_jiffies (unsigned long long tval
, long hz
)
2892 struct timespec t
= time_from_jiffies (tval
, hz
);
2893 return make_lisp_time (t
);
2896 static struct timespec
2900 struct timespec up
= make_timespec (0, 0);
2903 fup
= emacs_fopen ("/proc/uptime", "r");
2907 unsigned long long upsec
, upfrac
, idlesec
, idlefrac
;
2908 int upfrac_start
, upfrac_end
, idlefrac_start
, idlefrac_end
;
2910 if (fscanf (fup
, "%llu.%n%llu%n %llu.%n%llu%n",
2911 &upsec
, &upfrac_start
, &upfrac
, &upfrac_end
,
2912 &idlesec
, &idlefrac_start
, &idlefrac
, &idlefrac_end
)
2915 if (TYPE_MAXIMUM (time_t) < upsec
)
2917 upsec
= TYPE_MAXIMUM (time_t);
2918 upfrac
= TIMESPEC_RESOLUTION
- 1;
2922 int upfraclen
= upfrac_end
- upfrac_start
;
2923 for (; upfraclen
< LOG10_TIMESPEC_RESOLUTION
; upfraclen
++)
2925 for (; LOG10_TIMESPEC_RESOLUTION
< upfraclen
; upfraclen
--)
2927 upfrac
= min (upfrac
, TIMESPEC_RESOLUTION
- 1);
2929 up
= make_timespec (upsec
, upfrac
);
2938 #define MAJOR(d) (((unsigned)(d) >> 8) & 0xfff)
2939 #define MINOR(d) (((unsigned)(d) & 0xff) | (((unsigned)(d) & 0xfff00000) >> 12))
2942 procfs_ttyname (int rdev
)
2945 char name
[PATH_MAX
];
2948 fdev
= emacs_fopen ("/proc/tty/drivers", "r");
2954 unsigned long minor_beg
, minor_end
;
2955 char minor
[25]; /* 2 32-bit numbers + dash */
2958 for (; !feof (fdev
) && !ferror (fdev
); name
[0] = 0)
2960 if (fscanf (fdev
, "%*s %s %u %s %*s\n", name
, &major
, minor
) >= 3
2961 && major
== MAJOR (rdev
))
2963 minor_beg
= strtoul (minor
, &endp
, 0);
2965 minor_end
= minor_beg
;
2966 else if (*endp
== '-')
2967 minor_end
= strtoul (endp
+ 1, &endp
, 0);
2971 if (MINOR (rdev
) >= minor_beg
&& MINOR (rdev
) <= minor_end
)
2973 sprintf (name
+ strlen (name
), "%u", MINOR (rdev
));
2981 return build_string (name
);
2985 procfs_get_total_memory (void)
2988 uintmax_t retval
= 2 * 1024 * 1024; /* default: 2 GiB */
2992 fmem
= emacs_fopen ("/proc/meminfo", "r");
2996 uintmax_t entry_value
;
3000 switch (fscanf (fmem
, "MemTotal: %"SCNuMAX
, &entry_value
))
3003 retval
= entry_value
;
3008 while ((c
= getc (fmem
)) != EOF
&& c
!= '\n')
3026 system_process_attributes (Lisp_Object pid
)
3028 char procfn
[PATH_MAX
], fn
[PATH_MAX
];
3032 long clocks_per_sec
;
3034 char procbuf
[1025], *p
, *q
;
3037 static char const default_cmd
[] = "???";
3038 const char *cmd
= default_cmd
;
3039 int cmdsize
= sizeof default_cmd
- 1;
3040 char *cmdline
= NULL
;
3041 ptrdiff_t cmdline_size
;
3044 int ppid
, pgrp
, sess
, tty
, tpgid
, thcount
;
3047 unsigned long long u_time
, s_time
, cutime
, cstime
, start
;
3048 long priority
, niceness
, rss
;
3049 unsigned long minflt
, majflt
, cminflt
, cmajflt
, vsize
;
3050 struct timespec tnow
, tstart
, tboot
, telapsed
, us_time
;
3052 Lisp_Object attrs
= Qnil
;
3053 Lisp_Object cmd_str
, decoded_cmd
;
3056 CHECK_NUMBER_OR_FLOAT (pid
);
3057 CONS_TO_INTEGER (pid
, pid_t
, proc_id
);
3058 sprintf (procfn
, "/proc/%"pMd
, proc_id
);
3059 if (stat (procfn
, &st
) < 0)
3064 attrs
= Fcons (Fcons (Qeuid
, make_fixnum_or_float (uid
)), attrs
);
3066 pw
= getpwuid (uid
);
3069 attrs
= Fcons (Fcons (Quser
, build_string (pw
->pw_name
)), attrs
);
3072 attrs
= Fcons (Fcons (Qegid
, make_fixnum_or_float (gid
)), attrs
);
3074 gr
= getgrgid (gid
);
3077 attrs
= Fcons (Fcons (Qgroup
, build_string (gr
->gr_name
)), attrs
);
3079 count
= SPECPDL_INDEX ();
3080 strcpy (fn
, procfn
);
3081 procfn_end
= fn
+ strlen (fn
);
3082 strcpy (procfn_end
, "/stat");
3083 fd
= emacs_open (fn
, O_RDONLY
, 0);
3088 record_unwind_protect_int (close_file_unwind
, fd
);
3089 nread
= emacs_read (fd
, procbuf
, sizeof procbuf
- 1);
3093 procbuf
[nread
] = '\0';
3096 p
= strchr (p
, '(');
3099 q
= strrchr (p
+ 1, ')');
3109 /* Command name is encoded in locale-coding-system; decode it. */
3110 cmd_str
= make_unibyte_string (cmd
, cmdsize
);
3111 decoded_cmd
= code_convert_string_norecord (cmd_str
,
3112 Vlocale_coding_system
, 0);
3113 attrs
= Fcons (Fcons (Qcomm
, decoded_cmd
), attrs
);
3115 /* state ppid pgrp sess tty tpgid . minflt cminflt majflt cmajflt
3116 utime stime cutime cstime priority nice thcount . start vsize rss */
3118 && (sscanf (q
+ 2, ("%c %d %d %d %d %d %*u %lu %lu %lu %lu "
3119 "%Lu %Lu %Lu %Lu %ld %ld %d %*d %Lu %lu %ld"),
3120 &c
, &ppid
, &pgrp
, &sess
, &tty
, &tpgid
,
3121 &minflt
, &cminflt
, &majflt
, &cmajflt
,
3122 &u_time
, &s_time
, &cutime
, &cstime
,
3123 &priority
, &niceness
, &thcount
, &start
, &vsize
, &rss
)
3128 state_str
[1] = '\0';
3129 attrs
= Fcons (Fcons (Qstate
, build_string (state_str
)), attrs
);
3130 attrs
= Fcons (Fcons (Qppid
, make_fixnum_or_float (ppid
)), attrs
);
3131 attrs
= Fcons (Fcons (Qpgrp
, make_fixnum_or_float (pgrp
)), attrs
);
3132 attrs
= Fcons (Fcons (Qsess
, make_fixnum_or_float (sess
)), attrs
);
3133 attrs
= Fcons (Fcons (Qttname
, procfs_ttyname (tty
)), attrs
);
3134 attrs
= Fcons (Fcons (Qtpgid
, make_fixnum_or_float (tpgid
)), attrs
);
3135 attrs
= Fcons (Fcons (Qminflt
, make_fixnum_or_float (minflt
)), attrs
);
3136 attrs
= Fcons (Fcons (Qmajflt
, make_fixnum_or_float (majflt
)), attrs
);
3137 attrs
= Fcons (Fcons (Qcminflt
, make_fixnum_or_float (cminflt
)),
3139 attrs
= Fcons (Fcons (Qcmajflt
, make_fixnum_or_float (cmajflt
)),
3141 clocks_per_sec
= sysconf (_SC_CLK_TCK
);
3142 if (clocks_per_sec
< 0)
3143 clocks_per_sec
= 100;
3144 attrs
= Fcons (Fcons (Qutime
,
3145 ltime_from_jiffies (u_time
, clocks_per_sec
)),
3147 attrs
= Fcons (Fcons (Qstime
,
3148 ltime_from_jiffies (s_time
, clocks_per_sec
)),
3150 attrs
= Fcons (Fcons (Qtime
,
3151 ltime_from_jiffies (s_time
+ u_time
,
3154 attrs
= Fcons (Fcons (Qcutime
,
3155 ltime_from_jiffies (cutime
, clocks_per_sec
)),
3157 attrs
= Fcons (Fcons (Qcstime
,
3158 ltime_from_jiffies (cstime
, clocks_per_sec
)),
3160 attrs
= Fcons (Fcons (Qctime
,
3161 ltime_from_jiffies (cstime
+ cutime
,
3164 attrs
= Fcons (Fcons (Qpri
, make_number (priority
)), attrs
);
3165 attrs
= Fcons (Fcons (Qnice
, make_number (niceness
)), attrs
);
3166 attrs
= Fcons (Fcons (Qthcount
, make_fixnum_or_float (thcount
)),
3168 tnow
= current_timespec ();
3169 telapsed
= get_up_time ();
3170 tboot
= timespec_sub (tnow
, telapsed
);
3171 tstart
= time_from_jiffies (start
, clocks_per_sec
);
3172 tstart
= timespec_add (tboot
, tstart
);
3173 attrs
= Fcons (Fcons (Qstart
, make_lisp_time (tstart
)), attrs
);
3174 attrs
= Fcons (Fcons (Qvsize
, make_fixnum_or_float (vsize
/ 1024)),
3176 attrs
= Fcons (Fcons (Qrss
, make_fixnum_or_float (4 * rss
)), attrs
);
3177 telapsed
= timespec_sub (tnow
, tstart
);
3178 attrs
= Fcons (Fcons (Qetime
, make_lisp_time (telapsed
)), attrs
);
3179 us_time
= time_from_jiffies (u_time
+ s_time
, clocks_per_sec
);
3180 pcpu
= timespectod (us_time
) / timespectod (telapsed
);
3183 attrs
= Fcons (Fcons (Qpcpu
, make_float (100 * pcpu
)), attrs
);
3184 pmem
= 4.0 * 100 * rss
/ procfs_get_total_memory ();
3187 attrs
= Fcons (Fcons (Qpmem
, make_float (pmem
)), attrs
);
3190 unbind_to (count
, Qnil
);
3193 strcpy (procfn_end
, "/cmdline");
3194 fd
= emacs_open (fn
, O_RDONLY
, 0);
3197 ptrdiff_t readsize
, nread_incr
;
3198 record_unwind_protect_int (close_file_unwind
, fd
);
3199 record_unwind_protect_nothing ();
3200 nread
= cmdline_size
= 0;
3204 cmdline
= xpalloc (cmdline
, &cmdline_size
, 2, STRING_BYTES_BOUND
, 1);
3205 set_unwind_protect_ptr (count
+ 1, xfree
, cmdline
);
3207 /* Leave room even if every byte needs escaping below. */
3208 readsize
= (cmdline_size
>> 1) - nread
;
3210 nread_incr
= emacs_read (fd
, cmdline
+ nread
, readsize
);
3211 nread
+= max (0, nread_incr
);
3213 while (nread_incr
== readsize
);
3217 /* We don't want trailing null characters. */
3218 for (p
= cmdline
+ nread
; cmdline
< p
&& !p
[-1]; p
--)
3221 /* Escape-quote whitespace and backslashes. */
3222 q
= cmdline
+ cmdline_size
;
3227 if (c_isspace (c
) || c
== '\\')
3231 nread
= cmdline
+ cmdline_size
- q
;
3236 nread
= cmdsize
+ 2;
3237 cmdline_size
= nread
+ 1;
3238 q
= cmdline
= xrealloc (cmdline
, cmdline_size
);
3239 set_unwind_protect_ptr (count
+ 1, xfree
, cmdline
);
3240 sprintf (cmdline
, "[%.*s]", cmdsize
, cmd
);
3242 /* Command line is encoded in locale-coding-system; decode it. */
3243 cmd_str
= make_unibyte_string (q
, nread
);
3244 decoded_cmd
= code_convert_string_norecord (cmd_str
,
3245 Vlocale_coding_system
, 0);
3246 unbind_to (count
, Qnil
);
3247 attrs
= Fcons (Fcons (Qargs
, decoded_cmd
), attrs
);
3253 #elif defined (SOLARIS2) && defined (HAVE_PROCFS)
3255 /* The <procfs.h> header does not like to be included if _LP64 is defined and
3256 __FILE_OFFSET_BITS == 64. This is an ugly workaround that. */
3257 #if !defined (_LP64) && defined (_FILE_OFFSET_BITS) && (_FILE_OFFSET_BITS == 64)
3258 #define PROCFS_FILE_OFFSET_BITS_HACK 1
3259 #undef _FILE_OFFSET_BITS
3261 #define PROCFS_FILE_OFFSET_BITS_HACK 0
3266 #if PROCFS_FILE_OFFSET_BITS_HACK == 1
3267 #define _FILE_OFFSET_BITS 64
3268 #ifdef _FILE_OFFSET_BITS /* Avoid unused-macro warnings. */
3270 #endif /* PROCFS_FILE_OFFSET_BITS_HACK == 1 */
3273 system_process_attributes (Lisp_Object pid
)
3275 char procfn
[PATH_MAX
], fn
[PATH_MAX
];
3280 struct psinfo pinfo
;
3286 Lisp_Object attrs
= Qnil
;
3287 Lisp_Object decoded_cmd
;
3290 CHECK_NUMBER_OR_FLOAT (pid
);
3291 CONS_TO_INTEGER (pid
, pid_t
, proc_id
);
3292 sprintf (procfn
, "/proc/%"pMd
, proc_id
);
3293 if (stat (procfn
, &st
) < 0)
3298 attrs
= Fcons (Fcons (Qeuid
, make_fixnum_or_float (uid
)), attrs
);
3300 pw
= getpwuid (uid
);
3303 attrs
= Fcons (Fcons (Quser
, build_string (pw
->pw_name
)), attrs
);
3306 attrs
= Fcons (Fcons (Qegid
, make_fixnum_or_float (gid
)), attrs
);
3308 gr
= getgrgid (gid
);
3311 attrs
= Fcons (Fcons (Qgroup
, build_string (gr
->gr_name
)), attrs
);
3313 count
= SPECPDL_INDEX ();
3314 strcpy (fn
, procfn
);
3315 procfn_end
= fn
+ strlen (fn
);
3316 strcpy (procfn_end
, "/psinfo");
3317 fd
= emacs_open (fn
, O_RDONLY
, 0);
3322 record_unwind_protect (close_file_unwind
, fd
);
3323 nread
= emacs_read (fd
, &pinfo
, sizeof pinfo
);
3326 if (nread
== sizeof pinfo
)
3328 attrs
= Fcons (Fcons (Qppid
, make_fixnum_or_float (pinfo
.pr_ppid
)), attrs
);
3329 attrs
= Fcons (Fcons (Qpgrp
, make_fixnum_or_float (pinfo
.pr_pgid
)), attrs
);
3330 attrs
= Fcons (Fcons (Qsess
, make_fixnum_or_float (pinfo
.pr_sid
)), attrs
);
3334 state_str
[0] = pinfo
.pr_lwp
.pr_sname
;
3335 state_str
[1] = '\0';
3336 attrs
= Fcons (Fcons (Qstate
, build_string (state_str
)), attrs
);
3339 /* FIXME: missing Qttyname. psinfo.pr_ttydev is a dev_t,
3340 need to get a string from it. */
3342 /* FIXME: missing: Qtpgid */
3354 Are they available? */
3356 attrs
= Fcons (Fcons (Qtime
, make_lisp_time (pinfo
.pr_time
)), attrs
);
3357 attrs
= Fcons (Fcons (Qctime
, make_lisp_time (pinfo
.pr_ctime
)), attrs
);
3358 attrs
= Fcons (Fcons (Qpri
, make_number (pinfo
.pr_lwp
.pr_pri
)), attrs
);
3359 attrs
= Fcons (Fcons (Qnice
, make_number (pinfo
.pr_lwp
.pr_nice
)), attrs
);
3360 attrs
= Fcons (Fcons (Qthcount
, make_fixnum_or_float (pinfo
.pr_nlwp
)),
3363 attrs
= Fcons (Fcons (Qstart
, make_lisp_time (pinfo
.pr_start
)), attrs
);
3364 attrs
= Fcons (Fcons (Qvsize
, make_fixnum_or_float (pinfo
.pr_size
)),
3366 attrs
= Fcons (Fcons (Qrss
, make_fixnum_or_float (pinfo
.pr_rssize
)),
3369 /* pr_pctcpu and pr_pctmem are unsigned integers in the
3370 range 0 .. 2**15, representing 0.0 .. 1.0. */
3371 attrs
= Fcons (Fcons (Qpcpu
,
3372 make_float (100.0 / 0x8000 * pinfo
.pr_pctcpu
)),
3374 attrs
= Fcons (Fcons (Qpmem
,
3375 make_float (100.0 / 0x8000 * pinfo
.pr_pctmem
)),
3378 decoded_cmd
= (code_convert_string_norecord
3379 (build_unibyte_string (pinfo
.pr_fname
),
3380 Vlocale_coding_system
, 0));
3381 attrs
= Fcons (Fcons (Qcomm
, decoded_cmd
), attrs
);
3382 decoded_cmd
= (code_convert_string_norecord
3383 (build_unibyte_string (pinfo
.pr_psargs
),
3384 Vlocale_coding_system
, 0));
3385 attrs
= Fcons (Fcons (Qargs
, decoded_cmd
), attrs
);
3387 unbind_to (count
, Qnil
);
3391 #elif defined __FreeBSD__
3393 static struct timespec
3394 timeval_to_timespec (struct timeval t
)
3396 return make_timespec (t
.tv_sec
, t
.tv_usec
* 1000);
3400 make_lisp_timeval (struct timeval t
)
3402 return make_lisp_time (timeval_to_timespec (t
));
3406 system_process_attributes (Lisp_Object pid
)
3409 int pagesize
= getpagesize ();
3410 unsigned long npages
;
3416 char args
[MAXPATHLEN
];
3417 struct timespec t
, now
;
3419 int mib
[4] = {CTL_KERN
, KERN_PROC
, KERN_PROC_PID
};
3420 struct kinfo_proc proc
;
3421 size_t proclen
= sizeof proc
;
3423 Lisp_Object attrs
= Qnil
;
3424 Lisp_Object decoded_comm
;
3426 CHECK_NUMBER_OR_FLOAT (pid
);
3427 CONS_TO_INTEGER (pid
, int, proc_id
);
3430 if (sysctl (mib
, 4, &proc
, &proclen
, NULL
, 0) != 0)
3433 attrs
= Fcons (Fcons (Qeuid
, make_fixnum_or_float (proc
.ki_uid
)), attrs
);
3436 pw
= getpwuid (proc
.ki_uid
);
3439 attrs
= Fcons (Fcons (Quser
, build_string (pw
->pw_name
)), attrs
);
3441 attrs
= Fcons (Fcons (Qegid
, make_fixnum_or_float (proc
.ki_svgid
)), attrs
);
3444 gr
= getgrgid (proc
.ki_svgid
);
3447 attrs
= Fcons (Fcons (Qgroup
, build_string (gr
->gr_name
)), attrs
);
3449 decoded_comm
= (code_convert_string_norecord
3450 (build_unibyte_string (proc
.ki_comm
),
3451 Vlocale_coding_system
, 0));
3453 attrs
= Fcons (Fcons (Qcomm
, decoded_comm
), attrs
);
3455 char state
[2] = {'\0', '\0'};
3456 switch (proc
.ki_stat
)
3478 attrs
= Fcons (Fcons (Qstate
, build_string (state
)), attrs
);
3481 attrs
= Fcons (Fcons (Qppid
, make_fixnum_or_float (proc
.ki_ppid
)), attrs
);
3482 attrs
= Fcons (Fcons (Qpgrp
, make_fixnum_or_float (proc
.ki_pgid
)), attrs
);
3483 attrs
= Fcons (Fcons (Qsess
, make_fixnum_or_float (proc
.ki_sid
)), attrs
);
3486 ttyname
= proc
.ki_tdev
== NODEV
? NULL
: devname (proc
.ki_tdev
, S_IFCHR
);
3489 attrs
= Fcons (Fcons (Qtty
, build_string (ttyname
)), attrs
);
3491 attrs
= Fcons (Fcons (Qtpgid
, make_fixnum_or_float (proc
.ki_tpgid
)), attrs
);
3492 attrs
= Fcons (Fcons (Qminflt
, make_fixnum_or_float (proc
.ki_rusage
.ru_minflt
)), attrs
);
3493 attrs
= Fcons (Fcons (Qmajflt
, make_fixnum_or_float (proc
.ki_rusage
.ru_majflt
)), attrs
);
3494 attrs
= Fcons (Fcons (Qcminflt
, make_number (proc
.ki_rusage_ch
.ru_minflt
)), attrs
);
3495 attrs
= Fcons (Fcons (Qcmajflt
, make_number (proc
.ki_rusage_ch
.ru_majflt
)), attrs
);
3497 attrs
= Fcons (Fcons (Qutime
, make_lisp_timeval (proc
.ki_rusage
.ru_utime
)),
3499 attrs
= Fcons (Fcons (Qstime
, make_lisp_timeval (proc
.ki_rusage
.ru_stime
)),
3501 t
= timespec_add (timeval_to_timespec (proc
.ki_rusage
.ru_utime
),
3502 timeval_to_timespec (proc
.ki_rusage
.ru_stime
));
3503 attrs
= Fcons (Fcons (Qtime
, make_lisp_time (t
)), attrs
);
3505 attrs
= Fcons (Fcons (Qcutime
,
3506 make_lisp_timeval (proc
.ki_rusage_ch
.ru_utime
)),
3508 attrs
= Fcons (Fcons (Qcstime
,
3509 make_lisp_timeval (proc
.ki_rusage_ch
.ru_utime
)),
3511 t
= timespec_add (timeval_to_timespec (proc
.ki_rusage_ch
.ru_utime
),
3512 timeval_to_timespec (proc
.ki_rusage_ch
.ru_stime
));
3513 attrs
= Fcons (Fcons (Qctime
, make_lisp_time (t
)), attrs
);
3515 attrs
= Fcons (Fcons (Qthcount
, make_fixnum_or_float (proc
.ki_numthreads
)),
3517 attrs
= Fcons (Fcons (Qpri
, make_number (proc
.ki_pri
.pri_native
)), attrs
);
3518 attrs
= Fcons (Fcons (Qnice
, make_number (proc
.ki_nice
)), attrs
);
3519 attrs
= Fcons (Fcons (Qstart
, make_lisp_timeval (proc
.ki_start
)), attrs
);
3520 attrs
= Fcons (Fcons (Qvsize
, make_number (proc
.ki_size
>> 10)), attrs
);
3521 attrs
= Fcons (Fcons (Qrss
, make_number (proc
.ki_rssize
* pagesize
>> 10)),
3524 now
= current_timespec ();
3525 t
= timespec_sub (now
, timeval_to_timespec (proc
.ki_start
));
3526 attrs
= Fcons (Fcons (Qetime
, make_lisp_time (t
)), attrs
);
3528 len
= sizeof fscale
;
3529 if (sysctlbyname ("kern.fscale", &fscale
, &len
, NULL
, 0) == 0)
3534 if (sysctlbyname ("kern.ccpu", &ccpu
, &len
, NULL
, 0) == 0)
3536 pcpu
= (100.0 * proc
.ki_pctcpu
/ fscale
3537 / (1 - exp (proc
.ki_swtime
* log ((double) ccpu
/ fscale
))));
3538 attrs
= Fcons (Fcons (Qpcpu
, make_fixnum_or_float (pcpu
)), attrs
);
3542 len
= sizeof npages
;
3543 if (sysctlbyname ("hw.availpages", &npages
, &len
, NULL
, 0) == 0)
3545 double pmem
= (proc
.ki_flag
& P_INMEM
3546 ? 100.0 * proc
.ki_rssize
/ npages
3548 attrs
= Fcons (Fcons (Qpmem
, make_fixnum_or_float (pmem
)), attrs
);
3551 mib
[2] = KERN_PROC_ARGS
;
3553 if (sysctl (mib
, 4, args
, &len
, NULL
, 0) == 0)
3556 for (i
= 0; i
< len
; i
++)
3558 if (! args
[i
] && i
< len
- 1)
3563 (code_convert_string_norecord
3564 (build_unibyte_string (args
),
3565 Vlocale_coding_system
, 0));
3567 attrs
= Fcons (Fcons (Qargs
, decoded_comm
), attrs
);
3573 /* The WINDOWSNT implementation is in w32.c.
3574 The MSDOS implementation is in dosfns.c. */
3575 #elif !defined (WINDOWSNT) && !defined (MSDOS)
3578 system_process_attributes (Lisp_Object pid
)
3583 #endif /* !defined (WINDOWSNT) */
3585 /* Wide character string collation. */
3587 #ifdef __STDC_ISO_10646__
3589 # include <wctype.h>
3591 # if defined HAVE_NEWLOCALE || defined HAVE_SETLOCALE
3592 # include <locale.h>
3595 # define LC_COLLATE 0
3597 # ifndef LC_COLLATE_MASK
3598 # define LC_COLLATE_MASK 0
3603 # ifndef LC_CTYPE_MASK
3604 # define LC_CTYPE_MASK 0
3607 # ifndef HAVE_NEWLOCALE
3613 # define freelocale emacs_freelocale
3614 # define locale_t emacs_locale_t
3615 # define newlocale emacs_newlocale
3616 # define wcscoll_l emacs_wcscoll_l
3617 # define towlower_l emacs_towlower_l
3619 typedef char const *locale_t
;
3622 newlocale (int category_mask
, char const *locale
, locale_t loc
)
3628 freelocale (locale_t loc
)
3633 emacs_setlocale (int category
, char const *locale
)
3635 # ifdef HAVE_SETLOCALE
3637 char *loc
= setlocale (category
, locale
);
3648 wcscoll_l (wchar_t const *a
, wchar_t const *b
, locale_t loc
)
3651 char *oldloc
= emacs_setlocale (LC_COLLATE
, NULL
);
3659 char *oldcopy
= SAFE_ALLOCA (strlen (oldloc
) + 1);
3660 strcpy (oldcopy
, oldloc
);
3661 if (! emacs_setlocale (LC_COLLATE
, loc
))
3666 result
= wcscoll (a
, b
);
3668 if (! emacs_setlocale (LC_COLLATE
, oldcopy
))
3679 towlower_l (wint_t wc
, locale_t loc
)
3682 char *oldloc
= emacs_setlocale (LC_CTYPE
, NULL
);
3687 char *oldcopy
= SAFE_ALLOCA (strlen (oldloc
) + 1);
3688 strcpy (oldcopy
, oldloc
);
3689 if (emacs_setlocale (LC_CTYPE
, loc
))
3691 result
= towlower (wc
);
3692 emacs_setlocale (LC_COLLATE
, oldcopy
);
3702 str_collate (Lisp_Object s1
, Lisp_Object s2
,
3703 Lisp_Object locale
, Lisp_Object ignore_case
)
3706 ptrdiff_t len
, i
, i_byte
;
3711 /* Convert byte stream to code points. */
3712 len
= SCHARS (s1
); i
= i_byte
= 0;
3713 SAFE_NALLOCA (p1
, 1, len
+ 1);
3715 FETCH_STRING_CHAR_ADVANCE (*(p1
+i
-1), s1
, i
, i_byte
);
3718 len
= SCHARS (s2
); i
= i_byte
= 0;
3719 SAFE_NALLOCA (p2
, 1, len
+ 1);
3721 FETCH_STRING_CHAR_ADVANCE (*(p2
+i
-1), s2
, i
, i_byte
);
3724 if (STRINGP (locale
))
3726 locale_t loc
= newlocale (LC_COLLATE_MASK
| LC_CTYPE_MASK
,
3727 SSDATA (locale
), 0);
3729 error ("Invalid locale %s: %s", SSDATA (locale
), strerror (errno
));
3731 if (! NILP (ignore_case
))
3732 for (int i
= 1; i
< 3; i
++)
3734 wchar_t *p
= (i
== 1) ? p1
: p2
;
3736 *p
= towlower_l (*p
, loc
);
3740 res
= wcscoll_l (p1
, p2
, loc
);
3746 if (! NILP (ignore_case
))
3747 for (int i
= 1; i
< 3; i
++)
3749 wchar_t *p
= (i
== 1) ? p1
: p2
;
3755 res
= wcscoll (p1
, p2
);
3758 # ifndef HAVE_NEWLOCALE
3760 error ("Invalid locale or string for collation: %s", strerror (err
));
3763 error ("Invalid string for collation: %s", strerror (err
));
3769 #endif /* __STDC_ISO_10646__ */
3773 str_collate (Lisp_Object s1
, Lisp_Object s2
,
3774 Lisp_Object locale
, Lisp_Object ignore_case
)
3777 char *loc
= STRINGP (locale
) ? SSDATA (locale
) : NULL
;
3778 int res
, err
= errno
;
3781 res
= w32_compare_strings (SDATA (s1
), SDATA (s2
), loc
, !NILP (ignore_case
));
3783 error ("Invalid string for collation: %s", strerror (errno
));
3788 #endif /* WINDOWSNT */