1 /* Interfaces to system-dependent kernel and library entries.
2 Copyright (C) 1985-1988, 1993-1995, 1999-2012
3 Free Software Foundation, Inc.
5 This file is part of GNU Emacs.
7 GNU Emacs is free software: you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation, either version 3 of the License, or
10 (at your option) any later version.
12 GNU Emacs is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
22 #define SYSTIME_INLINE EXTERN_INLINE
30 #endif /* HAVE_PWD_H */
34 #include <allocator.h>
36 #include <careadlinkat.h>
37 #include <ignore-value.h>
41 #include "sysselect.h"
42 #include "blockinput.h"
45 #include <sys/param.h>
46 #include <sys/sysctl.h>
51 #include <sys/resource.h>
57 #define write sys_write
59 #endif /* not WINDOWSNT */
61 #include <sys/types.h>
65 /* Get SI_SRPC_DOMAIN, if it is available. */
66 #ifdef HAVE_SYS_SYSTEMINFO_H
67 #include <sys/systeminfo.h>
70 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida, MW Aug 1993 */
72 #include <sys/param.h>
81 #ifdef HAVE_SYS_UTSNAME_H
82 #include <sys/utsname.h>
84 #endif /* HAVE_SYS_UTSNAME_H */
89 #include "termhooks.h"
92 #include "dispextern.h"
94 #include "cm.h" /* for reset_sys_modes */
98 /* In process.h which conflicts with the local copy. */
100 int _cdecl
_spawnlp (int, const char *, const char *, ...);
101 int _cdecl
_getpid (void);
102 extern char *getwd (char *);
105 #include "syssignal.h"
108 static int emacs_get_tty (int, struct emacs_tty
*);
109 static int emacs_set_tty (int, struct emacs_tty
*, int);
110 #if defined TIOCNOTTY || defined USG5 || defined CYGWIN
111 static _Noreturn
void croak (char *);
114 /* ULLONG_MAX is missing on Red Hat Linux 7.3; see Bug#11781. */
116 #define ULLONG_MAX TYPE_MAXIMUM (unsigned long long int)
119 /* Declare here, including term.h is problematic on some systems. */
120 extern void tputs (const char *, int, int (*)(int));
122 static const int baud_convert
[] =
124 0, 50, 75, 110, 135, 150, 200, 300, 600, 1200,
125 1800, 2400, 4800, 9600, 19200, 38400
129 #if !defined (HAVE_GET_CURRENT_DIR_NAME) || defined (BROKEN_GET_CURRENT_DIR_NAME)
131 /* Return the current working directory. Returns NULL on errors.
132 Any other returned value must be freed with free. This is used
133 only when get_current_dir_name is not defined on the system. */
135 get_current_dir_name (void)
139 struct stat dotstat
, pwdstat
;
140 /* If PWD is accurate, use it instead of calling getwd. PWD is
141 sometimes a nicer name, and using it may avoid a fatal error if a
142 parent directory is searchable but not readable. */
143 if ((pwd
= getenv ("PWD")) != 0
144 && (IS_DIRECTORY_SEP (*pwd
) || (*pwd
&& IS_DEVICE_SEP (pwd
[1])))
145 && stat (pwd
, &pwdstat
) == 0
146 && stat (".", &dotstat
) == 0
147 && dotstat
.st_ino
== pwdstat
.st_ino
148 && dotstat
.st_dev
== pwdstat
.st_dev
150 && strlen (pwd
) < MAXPATHLEN
154 buf
= malloc (strlen (pwd
) + 1);
162 size_t buf_size
= 1024;
163 buf
= malloc (buf_size
);
168 if (getcwd (buf
, buf_size
) == buf
)
172 int tmp_errno
= errno
;
178 buf
= realloc (buf
, buf_size
);
186 /* We need MAXPATHLEN here. */
187 buf
= malloc (MAXPATHLEN
+ 1);
190 if (getwd (buf
) == NULL
)
192 int tmp_errno
= errno
;
204 /* Discard pending input on all input descriptors. */
207 discard_tty_input (void)
210 struct emacs_tty buf
;
215 #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */
216 while (dos_keyread () != -1)
218 #else /* not MSDOS */
220 struct tty_display_info
*tty
;
221 for (tty
= tty_list
; tty
; tty
= tty
->next
)
223 if (tty
->input
) /* Is the device suspended? */
225 emacs_get_tty (fileno (tty
->input
), &buf
);
226 emacs_set_tty (fileno (tty
->input
), &buf
, 0);
230 #endif /* not MSDOS */
231 #endif /* not WINDOWSNT */
237 /* Arrange for character C to be read as the next input from
239 XXX What if we have multiple ttys?
245 if (! FRAME_TERMCAP_P (SELECTED_FRAME ()))
248 /* Should perhaps error if in batch mode */
250 ioctl (fileno (CURTTY()->input
), TIOCSTI
, &c
);
251 #else /* no TIOCSTI */
252 error ("Cannot stuff terminal input characters in this version of Unix");
253 #endif /* no TIOCSTI */
259 init_baud_rate (int fd
)
269 #else /* not DOS_NT */
274 emacs_ospeed
= cfgetospeed (&sg
);
275 #endif /* not DOS_NT */
278 baud_rate
= (emacs_ospeed
< sizeof baud_convert
/ sizeof baud_convert
[0]
279 ? baud_convert
[emacs_ospeed
] : 9600);
286 /* Set nonzero to make following function work under dbx
287 (at least for bsd). */
288 int wait_debugging EXTERNALLY_VISIBLE
;
293 wait_for_termination_1 (pid_t pid
, int interruptible
)
297 #if (defined (BSD_SYSTEM) || defined (HPUX)) && !defined (__GNU__)
298 /* Note that kill returns -1 even if the process is just a zombie now.
299 But inevitably a SIGCHLD interrupt should be generated
300 and child_sig will do waitpid and make the process go away. */
301 /* There is some indication that there is a bug involved with
302 termination of subprocesses, perhaps involving a kernel bug too,
303 but no idea what it is. Just as a hunch we signal SIGCHLD to see
304 if that causes the problem to go away or get worse. */
305 sigset_t sigchild_mask
;
306 sigemptyset (&sigchild_mask
);
307 sigaddset (&sigchild_mask
, SIGCHLD
);
308 pthread_sigmask (SIG_SETMASK
, &sigchild_mask
, 0);
310 if (0 > kill (pid
, 0))
312 pthread_sigmask (SIG_SETMASK
, &empty_mask
, 0);
313 kill (getpid (), SIGCHLD
);
319 sigsuspend (&empty_mask
);
320 #else /* not BSD_SYSTEM, and not HPUX version >= 6 */
324 #else /* not WINDOWSNT */
326 sigemptyset (&blocked
);
327 sigaddset (&blocked
, SIGCHLD
);
328 pthread_sigmask (SIG_BLOCK
, &blocked
, 0);
330 if (kill (pid
, 0) == -1 && errno
== ESRCH
)
332 pthread_sigmask (SIG_UNBLOCK
, &blocked
, 0);
336 sigsuspend (&empty_mask
);
337 #endif /* not WINDOWSNT */
338 #endif /* not BSD_SYSTEM, and not HPUX version >= 6 */
344 /* Wait for subprocess with process id `pid' to terminate and
345 make sure it will get eliminated (not remain forever as a zombie) */
348 wait_for_termination (pid_t pid
)
350 wait_for_termination_1 (pid
, 0);
353 /* Like the above, but allow keyboard interruption. */
355 interruptible_wait_for_termination (pid_t pid
)
357 wait_for_termination_1 (pid
, 1);
361 * flush any pending output
362 * (may flush input as well; it does not matter the way we use it)
366 flush_pending_output (int channel
)
368 /* FIXME: maybe this function should be removed */
371 /* Set up the terminal at the other end of a pseudo-terminal that
372 we will be controlling an inferior through.
373 It should not echo or do line-editing, since that is done
374 in Emacs. No padding needed for insertion into an Emacs buffer. */
377 child_setup_tty (int out
)
382 emacs_get_tty (out
, &s
);
383 s
.main
.c_oflag
|= OPOST
; /* Enable output postprocessing */
384 s
.main
.c_oflag
&= ~ONLCR
; /* Disable map of NL to CR-NL on output */
386 /* http://lists.gnu.org/archive/html/emacs-devel/2008-05/msg00406.html
387 Some versions of GNU Hurd do not have FFDLY? */
389 s
.main
.c_oflag
&= ~(NLDLY
|CRDLY
|TABDLY
|BSDLY
|VTDLY
|FFDLY
);
390 /* No output delays */
392 s
.main
.c_oflag
&= ~(NLDLY
|CRDLY
|TABDLY
|BSDLY
|VTDLY
);
393 /* No output delays */
396 s
.main
.c_lflag
&= ~ECHO
; /* Disable echo */
397 s
.main
.c_lflag
|= ISIG
; /* Enable signals */
399 s
.main
.c_iflag
&= ~IUCLC
; /* Disable downcasing on input. */
402 s
.main
.c_iflag
&= ~ISTRIP
; /* don't strip 8th bit on input */
405 s
.main
.c_oflag
&= ~OLCUC
; /* Disable upcasing on output. */
407 s
.main
.c_oflag
&= ~TAB3
; /* Disable tab expansion */
408 s
.main
.c_cflag
= (s
.main
.c_cflag
& ~CSIZE
) | CS8
; /* Don't strip 8th bit */
409 s
.main
.c_cc
[VERASE
] = CDISABLE
; /* disable erase processing */
410 s
.main
.c_cc
[VKILL
] = CDISABLE
; /* disable kill processing */
413 s
.main
.c_cflag
= (s
.main
.c_cflag
& ~CBAUD
) | B9600
; /* baud rate sanity */
416 #ifdef SIGNALS_VIA_CHARACTERS
417 /* the QUIT and INTR character are used in process_send_signal
418 so set them here to something useful. */
419 if (s
.main
.c_cc
[VQUIT
] == CDISABLE
)
420 s
.main
.c_cc
[VQUIT
] = '\\'&037; /* Control-\ */
421 if (s
.main
.c_cc
[VINTR
] == CDISABLE
)
422 s
.main
.c_cc
[VINTR
] = 'C'&037; /* Control-C */
423 #endif /* not SIGNALS_VIA_CHARACTERS */
426 /* Also, PTY overloads NUL and BREAK.
427 don't ignore break, but don't signal either, so it looks like NUL. */
428 s
.main
.c_iflag
&= ~IGNBRK
;
429 s
.main
.c_iflag
&= ~BRKINT
;
430 /* rms: Formerly it set s.main.c_cc[VINTR] to 0377 here
431 unconditionally. Then a SIGNALS_VIA_CHARACTERS conditional
432 would force it to 0377. That looks like duplicated code. */
433 s
.main
.c_cflag
= (s
.main
.c_cflag
& ~CBAUD
) | B9600
; /* baud rate sanity */
436 /* We originally enabled ICANON (and set VEOF to 04), and then had
437 process.c send additional EOF chars to flush the output when faced
438 with long lines, but this leads to weird effects when the
439 subprocess has disabled ICANON and ends up seeing those spurious
440 extra EOFs. So we don't send EOFs any more in
441 process.c:send_process. First we tried to disable ICANON by
442 default, so if a subsprocess sets up ICANON, it's his problem (or
443 the Elisp package that talks to it) to deal with lines that are
444 too long. But this disables some features, such as the ability
445 to send EOF signals. So we re-enabled ICANON but there is no
446 more "send eof to flush" going on (which is wrong and unportable
447 in itself). The correct way to handle too much output is to
448 buffer what could not be written and then write it again when
449 select returns ok for writing. This has it own set of
450 problems. Write is now asynchronous, is that a problem? How much
451 do we buffer, and what do we do when that limit is reached? */
453 s
.main
.c_lflag
|= ICANON
; /* Enable line editing and eof processing */
454 s
.main
.c_cc
[VEOF
] = 'D'&037; /* Control-D */
455 #if 0 /* These settings only apply to non-ICANON mode. */
456 s
.main
.c_cc
[VMIN
] = 1;
457 s
.main
.c_cc
[VTIME
] = 0;
460 emacs_set_tty (out
, &s
, 0);
461 #endif /* not WINDOWSNT */
463 #endif /* not MSDOS */
466 /* Record a signal code and the action for it. */
470 struct sigaction action
;
473 static void save_signal_handlers (struct save_signal
*);
474 static void restore_signal_handlers (struct save_signal
*);
476 /* Suspend the Emacs process; give terminal to its superior. */
481 #if defined (SIGTSTP) && !defined (MSDOS)
484 int pgrp
= EMACS_GETPGRP (0);
485 EMACS_KILLPG (pgrp
, SIGTSTP
);
488 #else /* No SIGTSTP */
489 /* On a system where suspending is not implemented,
490 instead fork a subshell and let it talk directly to the terminal
494 #endif /* no SIGTSTP */
497 /* Fork a subshell. */
502 #ifdef DOS_NT /* Demacs 1.1.2 91/10/20 Manabu Higashida */
504 char oldwd
[MAXPATHLEN
+1]; /* Fixed length is safe on MSDOS. */
507 struct save_signal saved_handlers
[5];
509 unsigned char *volatile str_volatile
= 0;
513 saved_handlers
[0].code
= SIGINT
;
514 saved_handlers
[1].code
= SIGQUIT
;
515 saved_handlers
[2].code
= SIGTERM
;
517 saved_handlers
[3].code
= SIGIO
;
518 saved_handlers
[4].code
= 0;
520 saved_handlers
[3].code
= 0;
523 /* Mentioning current_buffer->buffer would mean including buffer.h,
524 which somehow wedges the hp compiler. So instead... */
526 dir
= intern ("default-directory");
527 if (NILP (Fboundp (dir
)))
529 dir
= Fsymbol_value (dir
);
533 dir
= expand_and_dir_to_file (Funhandled_file_name_directory (dir
), Qnil
);
534 str_volatile
= str
= alloca (SCHARS (dir
) + 2);
536 memcpy (str
, SDATA (dir
), len
);
537 if (str
[len
- 1] != '/') str
[len
++] = '/';
543 save_signal_handlers (saved_handlers
);
544 synch_process_alive
= 1;
548 error ("Can't spawn subshell");
555 #ifdef DOS_NT /* MW, Aug 1993 */
558 sh
= (char *) egetenv ("SUSPEND"); /* KFS, 1994-12-14 */
561 sh
= (char *) egetenv ("SHELL");
565 /* Use our buffer's default directory for the subshell. */
567 if (str
&& chdir ((char *) str
) != 0)
570 ignore_value (write (1, "Can't chdir\n", 12));
575 close_process_descs (); /* Close Emacs's pipes/ptys */
577 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */
579 char *epwd
= getenv ("PWD");
580 char old_pwd
[MAXPATHLEN
+1+4];
582 /* If PWD is set, pass it with corrected value. */
585 strcpy (old_pwd
, epwd
);
586 if (str
[len
- 1] == '/')
588 setenv ("PWD", str
, 1);
591 chdir (oldwd
); /* FIXME: Do the right thing on chdir failure. */
593 putenv (old_pwd
); /* restore previous value */
595 #else /* not MSDOS */
597 /* Waits for process completion */
598 pid
= _spawnlp (_P_WAIT
, sh
, sh
, NULL
);
599 chdir (oldwd
); /* FIXME: Do the right thing on chdir failure. */
601 write (1, "Can't execute subshell", 22);
602 #else /* not WINDOWSNT */
603 execlp (sh
, sh
, (char *) 0);
604 ignore_value (write (1, "Can't execute subshell", 22));
606 #endif /* not WINDOWSNT */
607 #endif /* not MSDOS */
610 /* Do this now if we did not do it before. */
612 save_signal_handlers (saved_handlers
);
613 synch_process_alive
= 1;
617 wait_for_termination (pid
);
619 restore_signal_handlers (saved_handlers
);
620 synch_process_alive
= 0;
624 save_signal_handlers (struct save_signal
*saved_handlers
)
626 while (saved_handlers
->code
)
628 struct sigaction action
;
629 emacs_sigaction_init (&action
, SIG_IGN
);
630 sigaction (saved_handlers
->code
, &action
, &saved_handlers
->action
);
636 restore_signal_handlers (struct save_signal
*saved_handlers
)
638 while (saved_handlers
->code
)
640 sigaction (saved_handlers
->code
, &saved_handlers
->action
, 0);
646 /* If SIGIO is broken, don't do anything. */
663 unrequest_sigio (void)
670 static int old_fcntl_flags
[MAXDESC
];
676 old_fcntl_flags
[fd
] = fcntl (fd
, F_GETFL
, 0) & ~FASYNC
;
677 fcntl (fd
, F_SETFL
, old_fcntl_flags
[fd
] | FASYNC
);
679 interrupts_deferred
= 0;
686 fcntl (fd
, F_SETFL
, old_fcntl_flags
[fd
]);
690 #ifdef FASYNC /* F_SETFL does not imply existence of FASYNC */
691 /* XXX Uhm, FASYNC is not used anymore here. */
692 /* XXX Yeah, but you need it for SIGIO, don't you? */
702 sigemptyset (&unblocked
);
704 sigaddset (&unblocked
, SIGWINCH
);
706 sigaddset (&unblocked
, SIGIO
);
707 pthread_sigmask (SIG_UNBLOCK
, &unblocked
, 0);
709 interrupts_deferred
= 0;
713 unrequest_sigio (void)
720 #if 0 /* XXX What's wrong with blocking SIGIO under X? */
725 sigemptyset (&blocked
);
727 sigaddset (&blocked
, SIGWINCH
);
729 sigaddset (&blocked
, SIGIO
);
730 pthread_sigmask (SIG_BLOCK
, &blocked
, 0);
731 interrupts_deferred
= 1;
734 #else /* no FASYNC */
740 if (noninteractive
|| read_socket_hook
)
743 croak ("request_sigio");
747 unrequest_sigio (void)
749 if (noninteractive
|| read_socket_hook
)
752 croak ("unrequest_sigio");
761 /* Getting and setting emacs_tty structures. */
763 /* Set *TC to the parameters associated with the terminal FD.
764 Return zero if all's well, or -1 if we ran into an error we
765 couldn't deal with. */
767 emacs_get_tty (int fd
, struct emacs_tty
*settings
)
769 /* Retrieve the primary parameters - baud rate, character size, etcetera. */
771 /* We have those nifty POSIX tcmumbleattr functions. */
772 memset (&settings
->main
, 0, sizeof (settings
->main
));
773 if (tcgetattr (fd
, &settings
->main
) < 0)
777 /* We have survived the tempest. */
782 /* Set the parameters of the tty on FD according to the contents of
783 *SETTINGS. If FLUSHP is non-zero, we discard input.
784 Return 0 if all went well, and -1 if anything failed. */
787 emacs_set_tty (int fd
, struct emacs_tty
*settings
, int flushp
)
789 /* Set the primary parameters - baud rate, character size, etcetera. */
792 /* We have those nifty POSIX tcmumbleattr functions.
793 William J. Smith <wjs@wiis.wang.com> writes:
794 "POSIX 1003.1 defines tcsetattr to return success if it was
795 able to perform any of the requested actions, even if some
796 of the requested actions could not be performed.
797 We must read settings back to ensure tty setup properly.
798 AIX requires this to keep tty from hanging occasionally." */
799 /* This make sure that we don't loop indefinitely in here. */
800 for (i
= 0 ; i
< 10 ; i
++)
801 if (tcsetattr (fd
, flushp
? TCSAFLUSH
: TCSADRAIN
, &settings
->main
) < 0)
812 memset (&new, 0, sizeof (new));
813 /* Get the current settings, and see if they're what we asked for. */
814 tcgetattr (fd
, &new);
815 /* We cannot use memcmp on the whole structure here because under
816 * aix386 the termios structure has some reserved field that may
819 if ( new.c_iflag
== settings
->main
.c_iflag
820 && new.c_oflag
== settings
->main
.c_oflag
821 && new.c_cflag
== settings
->main
.c_cflag
822 && new.c_lflag
== settings
->main
.c_lflag
823 && memcmp (new.c_cc
, settings
->main
.c_cc
, NCCS
) == 0)
830 /* We have survived the tempest. */
837 static int old_fcntl_owner
[MAXDESC
];
838 #endif /* F_SETOWN */
840 /* This may also be defined in stdio,
841 but if so, this does no harm,
842 and using the same name avoids wasting the other one's space. */
845 unsigned char _sobuf
[BUFSIZ
+8];
850 /* Initialize the terminal mode on all tty devices that are currently
854 init_all_sys_modes (void)
856 struct tty_display_info
*tty
;
857 for (tty
= tty_list
; tty
; tty
= tty
->next
)
858 init_sys_modes (tty
);
861 /* Initialize the terminal mode on the given tty device. */
864 init_sys_modes (struct tty_display_info
*tty_out
)
866 struct emacs_tty tty
;
867 Lisp_Object terminal
;
869 Vtty_erase_char
= Qnil
;
874 if (!tty_out
->output
)
875 return; /* The tty is suspended. */
877 if (! tty_out
->old_tty
)
878 tty_out
->old_tty
= xmalloc (sizeof *tty_out
->old_tty
);
880 emacs_get_tty (fileno (tty_out
->input
), tty_out
->old_tty
);
882 tty
= *tty_out
->old_tty
;
884 #if !defined (DOS_NT)
885 XSETINT (Vtty_erase_char
, tty
.main
.c_cc
[VERASE
]);
887 tty
.main
.c_iflag
|= (IGNBRK
); /* Ignore break condition */
888 tty
.main
.c_iflag
&= ~ICRNL
; /* Disable map of CR to NL on input */
889 #ifdef INLCR /* I'm just being cautious,
890 since I can't check how widespread INLCR is--rms. */
891 tty
.main
.c_iflag
&= ~INLCR
; /* Disable map of NL to CR on input */
894 tty
.main
.c_iflag
&= ~ISTRIP
; /* don't strip 8th bit on input */
896 tty
.main
.c_lflag
&= ~ECHO
; /* Disable echo */
897 tty
.main
.c_lflag
&= ~ICANON
; /* Disable erase/kill processing */
899 tty
.main
.c_lflag
&= ~IEXTEN
; /* Disable other editing characters. */
901 tty
.main
.c_lflag
|= ISIG
; /* Enable signals */
902 if (tty_out
->flow_control
)
904 tty
.main
.c_iflag
|= IXON
; /* Enable start/stop output control */
906 tty
.main
.c_iflag
&= ~IXANY
;
910 tty
.main
.c_iflag
&= ~IXON
; /* Disable start/stop output control */
911 tty
.main
.c_oflag
&= ~ONLCR
; /* Disable map of NL to CR-NL
913 tty
.main
.c_oflag
&= ~TAB3
; /* Disable tab expansion */
915 if (tty_out
->meta_key
)
917 tty
.main
.c_cflag
|= CS8
; /* allow 8th bit on input */
918 tty
.main
.c_cflag
&= ~PARENB
;/* Don't check parity */
922 XSETTERMINAL(terminal
, tty_out
->terminal
);
923 if (!NILP (Fcontrolling_tty_p (terminal
)))
925 tty
.main
.c_cc
[VINTR
] = quit_char
; /* C-g (usually) gives SIGINT */
926 /* Set up C-g for both SIGQUIT and SIGINT.
927 We don't know which we will get, but we handle both alike
928 so which one it really gives us does not matter. */
929 tty
.main
.c_cc
[VQUIT
] = quit_char
;
933 /* We normally don't get interrupt or quit signals from tty
934 devices other than our controlling terminal; therefore,
935 we must handle C-g as normal input. Unfortunately, this
936 means that the interrupt and quit feature must be
937 disabled on secondary ttys, or we would not even see the
940 Note that even though emacsclient could have special code
941 to pass SIGINT to Emacs, we should _not_ enable
942 interrupt/quit keys for emacsclient frames. This means
943 that we can't break out of loops in C code from a
944 secondary tty frame, but we can always decide what
945 display the C-g came from, which is more important from a
946 usability point of view. (Consider the case when two
947 people work together using the same Emacs instance.) */
948 tty
.main
.c_cc
[VINTR
] = CDISABLE
;
949 tty
.main
.c_cc
[VQUIT
] = CDISABLE
;
951 tty
.main
.c_cc
[VMIN
] = 1; /* Input should wait for at least 1 char */
952 tty
.main
.c_cc
[VTIME
] = 0; /* no matter how long that takes. */
954 tty
.main
.c_cc
[VSWTCH
] = CDISABLE
; /* Turn off shell layering use
959 tty
.main
.c_cc
[VSUSP
] = CDISABLE
; /* Turn off handling of C-z. */
962 tty
.main
.c_cc
[V_DSUSP
] = CDISABLE
; /* Turn off handling of C-y. */
964 #ifdef VDSUSP /* Some systems have VDSUSP, some have V_DSUSP. */
965 tty
.main
.c_cc
[VDSUSP
] = CDISABLE
;
968 tty
.main
.c_cc
[VLNEXT
] = CDISABLE
;
971 tty
.main
.c_cc
[VREPRINT
] = CDISABLE
;
972 #endif /* VREPRINT */
974 tty
.main
.c_cc
[VWERASE
] = CDISABLE
;
977 tty
.main
.c_cc
[VDISCARD
] = CDISABLE
;
978 #endif /* VDISCARD */
980 if (tty_out
->flow_control
)
983 tty
.main
.c_cc
[VSTART
] = '\021';
986 tty
.main
.c_cc
[VSTOP
] = '\023';
992 tty
.main
.c_cc
[VSTART
] = CDISABLE
;
995 tty
.main
.c_cc
[VSTOP
] = CDISABLE
;
1000 tty
.main
.c_cc
[VSTRT
] = CDISABLE
;
1001 tty
.main
.c_cc
[VSTOP
] = CDISABLE
;
1002 tty
.main
.c_cc
[VSUSP
] = CDISABLE
;
1003 tty
.main
.c_cc
[VDSUSP
] = CDISABLE
;
1004 if (tty_out
->flow_control
)
1007 tty
.main
.c_cc
[VSTART
] = '\021';
1010 tty
.main
.c_cc
[VSTOP
] = '\023';
1013 /* Also, PTY overloads NUL and BREAK.
1014 don't ignore break, but don't signal either, so it looks like NUL.
1015 This really serves a purpose only if running in an XTERM window
1016 or via TELNET or the like, but does no harm elsewhere. */
1017 tty
.main
.c_iflag
&= ~IGNBRK
;
1018 tty
.main
.c_iflag
&= ~BRKINT
;
1020 #endif /* not DOS_NT */
1022 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida, MW Aug 1993 */
1023 if (!tty_out
->term_initted
)
1024 internal_terminal_init ();
1025 dos_ttraw (tty_out
);
1028 emacs_set_tty (fileno (tty_out
->input
), &tty
, 0);
1030 /* This code added to insure that, if flow-control is not to be used,
1031 we have an unlocked terminal at the start. */
1034 if (!tty_out
->flow_control
) ioctl (fileno (tty_out
->input
), TCXONC
, 1);
1037 if (!tty_out
->flow_control
) ioctl (fileno (tty_out
->input
), TIOCSTART
, 0);
1040 #if !defined (DOS_NT)
1042 if (!tty_out
->flow_control
) tcflow (fileno (tty_out
->input
), TCOON
);
1047 #ifdef F_GETOWN /* F_SETFL does not imply existence of F_GETOWN */
1048 if (interrupt_input
)
1050 old_fcntl_owner
[fileno (tty_out
->input
)] =
1051 fcntl (fileno (tty_out
->input
), F_GETOWN
, 0);
1052 fcntl (fileno (tty_out
->input
), F_SETOWN
, getpid ());
1053 init_sigio (fileno (tty_out
->input
));
1055 if (gpm_tty
== tty_out
)
1057 /* Arrange for mouse events to give us SIGIO signals. */
1058 fcntl (gpm_fd
, F_SETOWN
, getpid ());
1059 fcntl (gpm_fd
, F_SETFL
, fcntl (gpm_fd
, F_GETFL
, 0) | O_NONBLOCK
);
1060 init_sigio (gpm_fd
);
1062 #endif /* HAVE_GPM */
1064 #endif /* F_GETOWN */
1065 #endif /* F_SETFL */
1068 /* This symbol is defined on recent USG systems.
1069 Someone says without this call USG won't really buffer the file
1070 even with a call to setbuf. */
1071 setvbuf (tty_out
->output
, (char *) _sobuf
, _IOFBF
, sizeof _sobuf
);
1073 setbuf (tty_out
->output
, (char *) _sobuf
);
1076 if (tty_out
->terminal
->set_terminal_modes_hook
)
1077 tty_out
->terminal
->set_terminal_modes_hook (tty_out
->terminal
);
1079 if (!tty_out
->term_initted
)
1081 Lisp_Object tail
, frame
;
1082 FOR_EACH_FRAME (tail
, frame
)
1084 /* XXX This needs to be revised. */
1085 if (FRAME_TERMCAP_P (XFRAME (frame
))
1086 && FRAME_TTY (XFRAME (frame
)) == tty_out
)
1087 init_frame_faces (XFRAME (frame
));
1091 if (tty_out
->term_initted
&& no_redraw_on_reenter
)
1093 /* We used to call "direct_output_forward_char(0)" here,
1094 but it's not clear why, since it may not do anything anyway. */
1098 Lisp_Object tail
, frame
;
1100 FOR_EACH_FRAME (tail
, frame
)
1102 if ((FRAME_TERMCAP_P (XFRAME (frame
))
1103 || FRAME_MSDOS_P (XFRAME (frame
)))
1104 && FRAME_TTY (XFRAME (frame
)) == tty_out
)
1105 FRAME_GARBAGED_P (XFRAME (frame
)) = 1;
1109 tty_out
->term_initted
= 1;
1112 /* Return nonzero if safe to use tabs in output.
1113 At the time this is called, init_sys_modes has not been done yet. */
1116 tabs_safe_p (int fd
)
1118 struct emacs_tty etty
;
1120 emacs_get_tty (fd
, &etty
);
1123 return ((etty
.main
.c_oflag
& TABDLY
) != TAB3
);
1124 #else /* not TABDLY */
1126 #endif /* not TABDLY */
1132 /* Get terminal size from system.
1133 Store number of lines into *HEIGHTP and width into *WIDTHP.
1134 We store 0 if there's no valid information. */
1137 get_tty_size (int fd
, int *widthp
, int *heightp
)
1139 #if defined TIOCGWINSZ
1142 struct winsize size
;
1144 if (ioctl (fd
, TIOCGWINSZ
, &size
) == -1)
1145 *widthp
= *heightp
= 0;
1148 *widthp
= size
.ws_col
;
1149 *heightp
= size
.ws_row
;
1152 #elif defined TIOCGSIZE
1154 /* SunOS - style. */
1155 struct ttysize size
;
1157 if (ioctl (fd
, TIOCGSIZE
, &size
) == -1)
1158 *widthp
= *heightp
= 0;
1161 *widthp
= size
.ts_cols
;
1162 *heightp
= size
.ts_lines
;
1165 #elif defined WINDOWSNT
1167 CONSOLE_SCREEN_BUFFER_INFO info
;
1168 if (GetConsoleScreenBufferInfo (GetStdHandle (STD_OUTPUT_HANDLE
), &info
))
1170 *widthp
= info
.srWindow
.Right
- info
.srWindow
.Left
+ 1;
1171 *heightp
= info
.srWindow
.Bottom
- info
.srWindow
.Top
+ 1;
1174 *widthp
= *heightp
= 0;
1178 *widthp
= ScreenCols ();
1179 *heightp
= ScreenRows ();
1181 #else /* system doesn't know size */
1189 /* Set the logical window size associated with descriptor FD
1190 to HEIGHT and WIDTH. This is used mainly with ptys. */
1193 set_window_size (int fd
, int height
, int width
)
1198 struct winsize size
;
1199 size
.ws_row
= height
;
1200 size
.ws_col
= width
;
1202 if (ioctl (fd
, TIOCSWINSZ
, &size
) == -1)
1203 return 0; /* error */
1210 /* SunOS - style. */
1211 struct ttysize size
;
1212 size
.ts_lines
= height
;
1213 size
.ts_cols
= width
;
1215 if (ioctl (fd
, TIOCGSIZE
, &size
) == -1)
1221 #endif /* not SunOS-style */
1222 #endif /* not BSD-style */
1227 /* Prepare all terminal devices for exiting Emacs. */
1230 reset_all_sys_modes (void)
1232 struct tty_display_info
*tty
;
1233 for (tty
= tty_list
; tty
; tty
= tty
->next
)
1234 reset_sys_modes (tty
);
1237 /* Prepare the terminal for closing it; move the cursor to the
1238 bottom of the frame, turn off interrupt-driven I/O, etc. */
1241 reset_sys_modes (struct tty_display_info
*tty_out
)
1248 if (!tty_out
->term_initted
)
1251 if (!tty_out
->output
)
1252 return; /* The tty is suspended. */
1254 /* Go to and clear the last line of the terminal. */
1256 cmgoto (tty_out
, FrameRows (tty_out
) - 1, 0);
1258 /* Code adapted from tty_clear_end_of_line. */
1259 if (tty_out
->TS_clr_line
)
1261 emacs_tputs (tty_out
, tty_out
->TS_clr_line
, 1, cmputc
);
1264 { /* have to do it the hard way */
1266 tty_turn_off_insert (tty_out
);
1268 for (i
= curX (tty_out
); i
< FrameCols (tty_out
) - 1; i
++)
1270 fputc (' ', tty_out
->output
);
1274 cmgoto (tty_out
, FrameRows (tty_out
) - 1, 0);
1275 fflush (tty_out
->output
);
1277 if (tty_out
->terminal
->reset_terminal_modes_hook
)
1278 tty_out
->terminal
->reset_terminal_modes_hook (tty_out
->terminal
);
1281 /* Avoid possible loss of output when changing terminal modes. */
1282 fsync (fileno (tty_out
->output
));
1286 #ifdef F_SETOWN /* F_SETFL does not imply existence of F_SETOWN */
1287 if (interrupt_input
)
1289 reset_sigio (fileno (tty_out
->input
));
1290 fcntl (fileno (tty_out
->input
), F_SETOWN
,
1291 old_fcntl_owner
[fileno (tty_out
->input
)]);
1293 #endif /* F_SETOWN */
1295 fcntl (fileno (tty_out
->input
), F_SETFL
,
1296 fcntl (fileno (tty_out
->input
), F_GETFL
, 0) & ~O_NDELAY
);
1298 #endif /* F_SETFL */
1300 if (tty_out
->old_tty
)
1301 while (emacs_set_tty (fileno (tty_out
->input
),
1302 tty_out
->old_tty
, 0) < 0 && errno
== EINTR
)
1305 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */
1313 /* Set up the proper status flags for use of a pty. */
1318 /* I'm told that TOICREMOTE does not mean control chars
1319 "can't be sent" but rather that they don't have
1320 input-editing or signaling effects.
1321 That should be good, because we have other ways
1322 to do those things in Emacs.
1323 However, telnet mode seems not to work on 4.2.
1324 So TIOCREMOTE is turned off now. */
1326 /* Under hp-ux, if TIOCREMOTE is turned on, some calls
1327 will hang. In particular, the "timeout" feature (which
1328 causes a read to return if there is no data available)
1329 does this. Also it is known that telnet mode will hang
1330 in such a way that Emacs must be stopped (perhaps this
1331 is the same problem).
1333 If TIOCREMOTE is turned off, then there is a bug in
1334 hp-ux which sometimes loses data. Apparently the
1335 code which blocks the master process when the internal
1336 buffer fills up does not work. Other than this,
1337 though, everything else seems to work fine.
1339 Since the latter lossage is more benign, we may as well
1340 lose that way. -- cph */
1342 #if defined (UNIX98_PTYS)
1345 ioctl (fd
, FIONBIO
, &on
);
1350 #endif /* HAVE_PTYS */
1353 #include <sys/socket.h>
1355 #endif /* HAVE_SOCKETS */
1358 #ifndef HAVE_H_ERRNO
1361 #endif /* TRY_AGAIN */
1364 init_system_name (void)
1366 #ifndef HAVE_GETHOSTNAME
1369 Vsystem_name
= build_string (uts
.nodename
);
1370 #else /* HAVE_GETHOSTNAME */
1371 unsigned int hostname_size
= 256;
1372 char *hostname
= alloca (hostname_size
);
1374 /* Try to get the host name; if the buffer is too short, try
1375 again. Apparently, the only indication gethostname gives of
1376 whether the buffer was large enough is the presence or absence
1377 of a '\0' in the string. Eech. */
1380 gethostname (hostname
, hostname_size
- 1);
1381 hostname
[hostname_size
- 1] = '\0';
1383 /* Was the buffer large enough for the '\0'? */
1384 if (strlen (hostname
) < hostname_size
- 1)
1387 hostname_size
<<= 1;
1388 hostname
= alloca (hostname_size
);
1391 /* Turn the hostname into the official, fully-qualified hostname.
1392 Don't do this if we're going to dump; this can confuse system
1393 libraries on some machines and make the dumped emacs core dump. */
1396 #endif /* not CANNOT_DUMP */
1397 if (! strchr (hostname
, '.'))
1400 #ifdef HAVE_GETADDRINFO
1401 struct addrinfo
*res
;
1402 struct addrinfo hints
;
1405 memset (&hints
, 0, sizeof (hints
));
1406 hints
.ai_socktype
= SOCK_STREAM
;
1407 hints
.ai_flags
= AI_CANONNAME
;
1409 for (count
= 0;; count
++)
1411 if ((ret
= getaddrinfo (hostname
, NULL
, &hints
, &res
)) == 0
1412 || ret
!= EAI_AGAIN
)
1417 Fsleep_for (make_number (1), Qnil
);
1422 struct addrinfo
*it
= res
;
1425 char *fqdn
= it
->ai_canonname
;
1426 if (fqdn
&& strchr (fqdn
, '.')
1427 && strcmp (fqdn
, "localhost.localdomain") != 0)
1433 hostname
= alloca (strlen (it
->ai_canonname
) + 1);
1434 strcpy (hostname
, it
->ai_canonname
);
1438 #else /* !HAVE_GETADDRINFO */
1440 for (count
= 0;; count
++)
1446 hp
= gethostbyname (hostname
);
1448 if (! (hp
== 0 && h_errno
== TRY_AGAIN
))
1455 Fsleep_for (make_number (1), Qnil
);
1460 char *fqdn
= (char *) hp
->h_name
;
1462 if (!strchr (fqdn
, '.'))
1464 /* We still don't have a fully qualified domain name.
1465 Try to find one in the list of alternate names */
1466 char **alias
= hp
->h_aliases
;
1468 && (!strchr (*alias
, '.')
1469 || !strcmp (*alias
, "localhost.localdomain")))
1476 #endif /* !HAVE_GETADDRINFO */
1478 #endif /* HAVE_SOCKETS */
1479 Vsystem_name
= build_string (hostname
);
1480 #endif /* HAVE_GETHOSTNAME */
1483 for (p
= SDATA (Vsystem_name
); *p
; p
++)
1484 if (*p
== ' ' || *p
== '\t')
1489 sigset_t empty_mask
;
1491 /* Store into *ACTION a signal action suitable for Emacs, with handler
1494 emacs_sigaction_init (struct sigaction
*action
, signal_handler_t handler
)
1496 sigemptyset (&action
->sa_mask
);
1497 action
->sa_handler
= handler
;
1498 action
->sa_flags
= 0;
1499 #if defined (SA_RESTART)
1500 /* Emacs mostly works better with restartable system services. If this
1501 flag exists, we probably want to turn it on here.
1502 However, on some systems (only hpux11 at present) this resets the
1503 timeout of `select' which means that `select' never finishes if
1504 it keeps getting signals.
1505 We define BROKEN_SA_RESTART on those systems. */
1506 /* It's not clear why the comment above says "mostly works better". --Stef
1507 When SYNC_INPUT is set, we don't want SA_RESTART because we need to poll
1508 for pending input so we need long-running syscalls to be interrupted
1509 after a signal that sets the interrupt_input_pending flag. */
1510 /* Non-interactive keyboard input goes through stdio, where we always
1511 want restartable system calls. */
1512 # if defined (BROKEN_SA_RESTART) || defined (SYNC_INPUT)
1515 action
->sa_flags
= SA_RESTART
;
1519 #ifdef FORWARD_SIGNAL_TO_MAIN_THREAD
1520 pthread_t main_thread
;
1523 /* If we are on the main thread, handle the signal SIG with HANDLER.
1524 Otherwise, redirect the signal to the main thread, blocking it from
1525 this thread. POSIX says any thread can receive a signal that is
1526 associated with a process, process group, or asynchronous event.
1527 On GNU/Linux that is not true, but for other systems (FreeBSD at
1530 handle_on_main_thread (int sig
, signal_handler_t handler
)
1532 /* Preserve errno, to avoid race conditions with signal handlers that
1533 might change errno. Races can occur even in single-threaded hosts. */
1534 int old_errno
= errno
;
1536 bool on_main_thread
= true;
1537 #ifdef FORWARD_SIGNAL_TO_MAIN_THREAD
1538 if (! pthread_equal (pthread_self (), main_thread
))
1541 sigemptyset (&blocked
);
1542 sigaddset (&blocked
, sig
);
1543 pthread_sigmask (SIG_BLOCK
, &blocked
, 0);
1544 pthread_kill (main_thread
, sig
);
1545 on_main_thread
= false;
1554 #if !defined HAVE_STRSIGNAL && !HAVE_DECL_SYS_SIGLIST
1555 static char *my_sys_siglist
[NSIG
];
1559 # define sys_siglist my_sys_siglist
1565 sigemptyset (&empty_mask
);
1567 #ifdef FORWARD_SIGNAL_TO_MAIN_THREAD
1568 main_thread
= pthread_self ();
1571 #if !defined HAVE_STRSIGNAL && !HAVE_DECL_SYS_SIGLIST
1575 sys_siglist
[SIGABRT
] = "Aborted";
1578 sys_siglist
[SIGAIO
] = "LAN I/O interrupt";
1581 sys_siglist
[SIGALRM
] = "Alarm clock";
1584 sys_siglist
[SIGBUS
] = "Bus error";
1587 sys_siglist
[SIGCLD
] = "Child status changed";
1590 sys_siglist
[SIGCHLD
] = "Child status changed";
1593 sys_siglist
[SIGCONT
] = "Continued";
1596 sys_siglist
[SIGDANGER
] = "Swap space dangerously low";
1599 sys_siglist
[SIGDGNOTIFY
] = "Notification message in queue";
1602 sys_siglist
[SIGEMT
] = "Emulation trap";
1605 sys_siglist
[SIGFPE
] = "Arithmetic exception";
1608 sys_siglist
[SIGFREEZE
] = "SIGFREEZE";
1611 sys_siglist
[SIGGRANT
] = "Monitor mode granted";
1614 sys_siglist
[SIGHUP
] = "Hangup";
1617 sys_siglist
[SIGILL
] = "Illegal instruction";
1620 sys_siglist
[SIGINT
] = "Interrupt";
1623 sys_siglist
[SIGIO
] = "I/O possible";
1626 sys_siglist
[SIGIOINT
] = "I/O intervention required";
1629 sys_siglist
[SIGIOT
] = "IOT trap";
1632 sys_siglist
[SIGKILL
] = "Killed";
1635 sys_siglist
[SIGLOST
] = "Resource lost";
1638 sys_siglist
[SIGLWP
] = "SIGLWP";
1641 sys_siglist
[SIGMSG
] = "Monitor mode data available";
1644 sys_siglist
[SIGWIND
] = "SIGPHONE";
1647 sys_siglist
[SIGPIPE
] = "Broken pipe";
1650 sys_siglist
[SIGPOLL
] = "Pollable event occurred";
1653 sys_siglist
[SIGPROF
] = "Profiling timer expired";
1656 sys_siglist
[SIGPTY
] = "PTY I/O interrupt";
1659 sys_siglist
[SIGPWR
] = "Power-fail restart";
1662 sys_siglist
[SIGQUIT
] = "Quit";
1665 sys_siglist
[SIGRETRACT
] = "Need to relinquish monitor mode";
1668 sys_siglist
[SIGSAK
] = "Secure attention";
1671 sys_siglist
[SIGSEGV
] = "Segmentation violation";
1674 sys_siglist
[SIGSOUND
] = "Sound completed";
1677 sys_siglist
[SIGSTOP
] = "Stopped (signal)";
1680 sys_siglist
[SIGSTP
] = "Stopped (user)";
1683 sys_siglist
[SIGSYS
] = "Bad argument to system call";
1686 sys_siglist
[SIGTERM
] = "Terminated";
1689 sys_siglist
[SIGTHAW
] = "SIGTHAW";
1692 sys_siglist
[SIGTRAP
] = "Trace/breakpoint trap";
1695 sys_siglist
[SIGTSTP
] = "Stopped (user)";
1698 sys_siglist
[SIGTTIN
] = "Stopped (tty input)";
1701 sys_siglist
[SIGTTOU
] = "Stopped (tty output)";
1704 sys_siglist
[SIGURG
] = "Urgent I/O condition";
1707 sys_siglist
[SIGUSR1
] = "User defined signal 1";
1710 sys_siglist
[SIGUSR2
] = "User defined signal 2";
1713 sys_siglist
[SIGVTALRM
] = "Virtual timer expired";
1716 sys_siglist
[SIGWAITING
] = "Process's LWPs are blocked";
1719 sys_siglist
[SIGWINCH
] = "Window size changed";
1722 sys_siglist
[SIGWIND
] = "SIGWIND";
1725 sys_siglist
[SIGXCPU
] = "CPU time limit exceeded";
1728 sys_siglist
[SIGXFSZ
] = "File size limit exceeded";
1731 #endif /* !defined HAVE_STRSIGNAL && !defined HAVE_DECL_SYS_SIGLIST */
1740 /* Figure out how many bits the system's random number generator uses.
1741 `random' and `lrand48' are assumed to return 31 usable bits.
1742 BSD `rand' returns a 31 bit value but the low order bits are unusable;
1743 so we'll shift it and treat it like the 15-bit USG `rand'. */
1747 # define RAND_BITS 31
1748 # else /* !HAVE_RANDOM */
1749 # ifdef HAVE_LRAND48
1750 # define RAND_BITS 31
1751 # define random lrand48
1752 # else /* !HAVE_LRAND48 */
1753 # define RAND_BITS 15
1754 # if RAND_MAX == 32767
1755 # define random rand
1756 # else /* RAND_MAX != 32767 */
1757 # if RAND_MAX == 2147483647
1758 # define random() (rand () >> 16)
1759 # else /* RAND_MAX != 2147483647 */
1761 # define random rand
1763 # define random() (rand () >> 16)
1765 # endif /* RAND_MAX != 2147483647 */
1766 # endif /* RAND_MAX != 32767 */
1767 # endif /* !HAVE_LRAND48 */
1768 # endif /* !HAVE_RANDOM */
1769 #endif /* !RAND_BITS */
1772 seed_random (void *seed
, ptrdiff_t seed_size
)
1774 #if defined HAVE_RANDOM || ! defined HAVE_LRAND48
1775 unsigned int arg
= 0;
1779 unsigned char *argp
= (unsigned char *) &arg
;
1780 unsigned char *seedp
= seed
;
1782 for (i
= 0; i
< seed_size
; i
++)
1783 argp
[i
% sizeof arg
] ^= seedp
[i
];
1787 # ifdef HAVE_LRAND48
1798 EMACS_TIME t
= current_emacs_time ();
1799 uintmax_t v
= getpid () ^ EMACS_SECS (t
) ^ EMACS_NSECS (t
);
1800 seed_random (&v
, sizeof v
);
1804 * Return a nonnegative random integer out of whatever we've got.
1805 * It contains enough bits to make a random (signed) Emacs fixnum.
1806 * This suffices even for a 64-bit architecture with a 15-bit rand.
1813 for (i
= 0; i
< (FIXNUM_BITS
+ RAND_BITS
- 1) / RAND_BITS
; i
++)
1814 val
= (random () ^ (val
<< RAND_BITS
)
1815 ^ (val
>> (BITS_PER_EMACS_INT
- RAND_BITS
)));
1816 val
^= val
>> (BITS_PER_EMACS_INT
- FIXNUM_BITS
);
1817 return val
& INTMASK
;
1820 #ifndef HAVE_SNPRINTF
1821 /* Approximate snprintf as best we can on ancient hosts that lack it. */
1823 snprintf (char *buf
, size_t bufsize
, char const *format
, ...)
1825 ptrdiff_t size
= min (bufsize
, PTRDIFF_MAX
);
1826 ptrdiff_t nbytes
= size
- 1;
1831 va_start (ap
, format
);
1832 nbytes
= doprnt (buf
, size
, format
, 0, ap
);
1836 if (nbytes
== size
- 1)
1838 /* Calculate the length of the string that would have been created
1839 had the buffer been large enough. */
1840 char stackbuf
[4000];
1842 ptrdiff_t bsize
= sizeof stackbuf
;
1843 va_start (ap
, format
);
1844 nbytes
= evxprintf (&b
, &bsize
, stackbuf
, -1, format
, ap
);
1850 if (INT_MAX
< nbytes
)
1863 /* If a backtrace is available, output the top lines of it to stderr.
1864 Do not output more than BACKTRACE_LIMIT or BACKTRACE_LIMIT_MAX lines.
1865 This function may be called from a signal handler, so it should
1866 not invoke async-unsafe functions like malloc. */
1868 emacs_backtrace (int backtrace_limit
)
1870 enum { BACKTRACE_LIMIT_MAX
= 500 };
1871 void *buffer
[BACKTRACE_LIMIT_MAX
+ 1];
1872 int bounded_limit
= min (backtrace_limit
, BACKTRACE_LIMIT_MAX
);
1873 int npointers
= backtrace (buffer
, bounded_limit
+ 1);
1875 ignore_value (write (STDERR_FILENO
, "\nBacktrace:\n", 12));
1876 backtrace_symbols_fd (buffer
, bounded_limit
, STDERR_FILENO
);
1877 if (bounded_limit
< npointers
)
1878 ignore_value (write (STDERR_FILENO
, "...\n", 4));
1882 /* Using emacs_abort lets GDB return from a breakpoint here. */
1886 fatal_error_backtrace (SIGABRT
, 10);
1891 emacs_open (const char *path
, int oflag
, int mode
)
1893 register int rtnval
;
1895 while ((rtnval
= open (path
, oflag
, mode
)) == -1
1896 && (errno
== EINTR
))
1902 emacs_close (int fd
)
1905 register int rtnval
;
1907 while ((rtnval
= close (fd
)) == -1
1908 && (errno
== EINTR
))
1911 /* If close is interrupted SunOS 4.1 may or may not have closed the
1912 file descriptor. If it did the second close will fail with
1913 errno = EBADF. That means we have succeeded. */
1914 if (rtnval
== -1 && did_retry
&& errno
== EBADF
)
1920 /* Maximum number of bytes to read or write in a single system call.
1921 This works around a serious bug in Linux kernels before 2.6.16; see
1922 <https://bugzilla.redhat.com/show_bug.cgi?format=multiple&id=612839>.
1923 It's likely to work around similar bugs in other operating systems, so do it
1924 on all platforms. Round INT_MAX down to a page size, with the conservative
1925 assumption that page sizes are at most 2**18 bytes (any kernel with a
1926 page size larger than that shouldn't have the bug). */
1927 #ifndef MAX_RW_COUNT
1928 #define MAX_RW_COUNT (INT_MAX >> 18 << 18)
1931 /* Read from FILEDESC to a buffer BUF with size NBYTE, retrying if interrupted.
1932 Return the number of bytes read, which might be less than NBYTE.
1933 On error, set errno and return -1. */
1935 emacs_read (int fildes
, char *buf
, ptrdiff_t nbyte
)
1937 register ssize_t rtnval
;
1939 /* There is no need to check against MAX_RW_COUNT, since no caller ever
1940 passes a size that large to emacs_read. */
1942 while ((rtnval
= read (fildes
, buf
, nbyte
)) == -1
1943 && (errno
== EINTR
))
1948 /* Write to FILEDES from a buffer BUF with size NBYTE, retrying if interrupted
1949 or if a partial write occurs. Return the number of bytes written, setting
1950 errno if this is less than NBYTE. */
1952 emacs_write (int fildes
, const char *buf
, ptrdiff_t nbyte
)
1955 ptrdiff_t bytes_written
;
1961 rtnval
= write (fildes
, buf
, min (nbyte
, MAX_RW_COUNT
));
1968 /* I originally used `QUIT' but that might causes files to
1969 be truncated if you hit C-g in the middle of it. --Stef */
1970 process_pending_signals ();
1980 bytes_written
+= rtnval
;
1983 return (bytes_written
);
1986 static struct allocator
const emacs_norealloc_allocator
=
1987 { xmalloc
, NULL
, xfree
, memory_full
};
1989 /* Get the symbolic link value of FILENAME. Return a pointer to a
1990 NUL-terminated string. If readlink fails, return NULL and set
1991 errno. If the value fits in INITIAL_BUF, return INITIAL_BUF.
1992 Otherwise, allocate memory and return a pointer to that memory. If
1993 memory allocation fails, diagnose and fail without returning. If
1994 successful, store the length of the symbolic link into *LINKLEN. */
1996 emacs_readlink (char const *filename
, char initial_buf
[READLINK_BUFSIZE
])
1998 return careadlinkat (AT_FDCWD
, filename
, initial_buf
, READLINK_BUFSIZE
,
1999 &emacs_norealloc_allocator
, careadlinkatcwd
);
2004 * All of the following are for USG.
2006 * On USG systems the system calls are INTERRUPTIBLE by signals
2007 * that the user program has elected to catch. Thus the system call
2008 * must be retried in these cases. To handle this without massive
2009 * changes in the source code, we remap the standard system call names
2010 * to names for our own functions in sysdep.c that do the system call
2011 * with retries. Actually, for portability reasons, it is good
2012 * programming practice, as this example shows, to limit all actual
2013 * system calls to a single occurrence in the source. Sure, this
2014 * adds an extra level of function call overhead but it is almost
2015 * always negligible. Fred Fish, Unisoft Systems Inc.
2019 * Warning, this function may not duplicate 4.2 action properly
2020 * under error conditions.
2023 #if !defined (HAVE_GETWD) || defined (BROKEN_GETWD)
2026 /* In 4.1, param.h fails to define this. */
2027 #define MAXPATHLEN 1024
2031 getwd (char *pathname
)
2033 char *npath
, *spath
;
2034 extern char *getcwd (char *, size_t);
2036 BLOCK_INPUT
; /* getcwd uses malloc */
2037 spath
= npath
= getcwd ((char *) 0, MAXPATHLEN
);
2043 /* On Altos 3068, getcwd can return @hostname/dir, so discard
2044 up to first slash. Should be harmless on other systems. */
2045 while (*npath
&& *npath
!= '/')
2047 strcpy (pathname
, npath
);
2048 free (spath
); /* getcwd uses malloc */
2053 #endif /* !defined (HAVE_GETWD) || defined (BROKEN_GETWD) */
2056 * This function will go away as soon as all the stubs fixed. (fnf)
2060 croak (char *badfunc
)
2062 printf ("%s not yet implemented\r\n", badfunc
);
2063 reset_all_sys_modes ();
2069 /* Directory routines for systems that don't have them. */
2071 #ifdef HAVE_DIRENT_H
2075 #if !defined (HAVE_CLOSEDIR)
2078 closedir (DIR *dirp
/* stream from opendir */)
2082 rtnval
= emacs_close (dirp
->dd_fd
);
2087 #endif /* not HAVE_CLOSEDIR */
2088 #endif /* HAVE_DIRENT_H */
2091 /* Return a struct timeval that is roughly equivalent to T.
2092 Use the least timeval not less than T.
2093 Return an extremal value if the result would overflow. */
2095 make_timeval (EMACS_TIME t
)
2098 tv
.tv_sec
= t
.tv_sec
;
2099 tv
.tv_usec
= t
.tv_nsec
/ 1000;
2101 if (t
.tv_nsec
% 1000 != 0)
2103 if (tv
.tv_usec
< 999999)
2105 else if (tv
.tv_sec
< TYPE_MAXIMUM (time_t))
2115 /* Set the access and modification time stamps of FD (a.k.a. FILE) to be
2116 ATIME and MTIME, respectively.
2117 FD must be either negative -- in which case it is ignored --
2118 or a file descriptor that is open on FILE.
2119 If FD is nonnegative, then FILE can be NULL. */
2121 set_file_times (int fd
, const char *filename
,
2122 EMACS_TIME atime
, EMACS_TIME mtime
)
2124 struct timespec timespec
[2];
2125 timespec
[0] = atime
;
2126 timespec
[1] = mtime
;
2127 return fdutimens (fd
, filename
, timespec
);
2130 #ifndef HAVE_STRSIGNAL
2132 strsignal (int code
)
2136 if (0 <= code
&& code
< NSIG
)
2138 /* Cast to suppress warning if the table has const char *. */
2139 signame
= (char *) sys_siglist
[code
];
2144 #endif /* HAVE_STRSIGNAL */
2147 /* For make-serial-process */
2149 serial_open (char *port
)
2153 fd
= emacs_open ((char*) port
,
2166 error ("Could not open %s: %s",
2167 port
, emacs_strerror (errno
));
2170 ioctl (fd
, TIOCEXCL
, (char *) 0);
2176 #if !defined (HAVE_CFMAKERAW)
2177 /* Workaround for targets which are missing cfmakeraw. */
2178 /* Pasted from man page. */
2180 cfmakeraw (struct termios
*termios_p
)
2182 termios_p
->c_iflag
&= ~(IGNBRK
|BRKINT
|PARMRK
|ISTRIP
|INLCR
|IGNCR
|ICRNL
|IXON
);
2183 termios_p
->c_oflag
&= ~OPOST
;
2184 termios_p
->c_lflag
&= ~(ECHO
|ECHONL
|ICANON
|ISIG
|IEXTEN
);
2185 termios_p
->c_cflag
&= ~(CSIZE
|PARENB
);
2186 termios_p
->c_cflag
|= CS8
;
2188 #endif /* !defined (HAVE_CFMAKERAW */
2190 #if !defined (HAVE_CFSETSPEED)
2191 /* Workaround for targets which are missing cfsetspeed. */
2193 cfsetspeed (struct termios
*termios_p
, speed_t vitesse
)
2195 return (cfsetispeed (termios_p
, vitesse
)
2196 + cfsetospeed (termios_p
, vitesse
));
2200 /* For serial-process-configure */
2202 serial_configure (struct Lisp_Process
*p
,
2203 Lisp_Object contact
)
2205 Lisp_Object childp2
= Qnil
;
2206 Lisp_Object tem
= Qnil
;
2207 struct termios attr
;
2209 char summary
[4] = "???"; /* This usually becomes "8N1". */
2211 childp2
= Fcopy_sequence (p
->childp
);
2213 /* Read port attributes and prepare default configuration. */
2214 err
= tcgetattr (p
->outfd
, &attr
);
2216 error ("tcgetattr() failed: %s", emacs_strerror (errno
));
2218 #if defined (CLOCAL)
2219 attr
.c_cflag
|= CLOCAL
;
2222 attr
.c_cflag
|= CREAD
;
2225 /* Configure speed. */
2226 if (!NILP (Fplist_member (contact
, QCspeed
)))
2227 tem
= Fplist_get (contact
, QCspeed
);
2229 tem
= Fplist_get (p
->childp
, QCspeed
);
2231 err
= cfsetspeed (&attr
, XINT (tem
));
2233 error ("cfsetspeed(%"pI
"d) failed: %s", XINT (tem
),
2234 emacs_strerror (errno
));
2235 childp2
= Fplist_put (childp2
, QCspeed
, tem
);
2237 /* Configure bytesize. */
2238 if (!NILP (Fplist_member (contact
, QCbytesize
)))
2239 tem
= Fplist_get (contact
, QCbytesize
);
2241 tem
= Fplist_get (p
->childp
, QCbytesize
);
2243 tem
= make_number (8);
2245 if (XINT (tem
) != 7 && XINT (tem
) != 8)
2246 error (":bytesize must be nil (8), 7, or 8");
2247 summary
[0] = XINT (tem
) + '0';
2248 #if defined (CSIZE) && defined (CS7) && defined (CS8)
2249 attr
.c_cflag
&= ~CSIZE
;
2250 attr
.c_cflag
|= ((XINT (tem
) == 7) ? CS7
: CS8
);
2252 /* Don't error on bytesize 8, which should be set by cfmakeraw. */
2253 if (XINT (tem
) != 8)
2254 error ("Bytesize cannot be changed");
2256 childp2
= Fplist_put (childp2
, QCbytesize
, tem
);
2258 /* Configure parity. */
2259 if (!NILP (Fplist_member (contact
, QCparity
)))
2260 tem
= Fplist_get (contact
, QCparity
);
2262 tem
= Fplist_get (p
->childp
, QCparity
);
2263 if (!NILP (tem
) && !EQ (tem
, Qeven
) && !EQ (tem
, Qodd
))
2264 error (":parity must be nil (no parity), `even', or `odd'");
2265 #if defined (PARENB) && defined (PARODD) && defined (IGNPAR) && defined (INPCK)
2266 attr
.c_cflag
&= ~(PARENB
| PARODD
);
2267 attr
.c_iflag
&= ~(IGNPAR
| INPCK
);
2272 else if (EQ (tem
, Qeven
))
2275 attr
.c_cflag
|= PARENB
;
2276 attr
.c_iflag
|= (IGNPAR
| INPCK
);
2278 else if (EQ (tem
, Qodd
))
2281 attr
.c_cflag
|= (PARENB
| PARODD
);
2282 attr
.c_iflag
|= (IGNPAR
| INPCK
);
2285 /* Don't error on no parity, which should be set by cfmakeraw. */
2287 error ("Parity cannot be configured");
2289 childp2
= Fplist_put (childp2
, QCparity
, tem
);
2291 /* Configure stopbits. */
2292 if (!NILP (Fplist_member (contact
, QCstopbits
)))
2293 tem
= Fplist_get (contact
, QCstopbits
);
2295 tem
= Fplist_get (p
->childp
, QCstopbits
);
2297 tem
= make_number (1);
2299 if (XINT (tem
) != 1 && XINT (tem
) != 2)
2300 error (":stopbits must be nil (1 stopbit), 1, or 2");
2301 summary
[2] = XINT (tem
) + '0';
2302 #if defined (CSTOPB)
2303 attr
.c_cflag
&= ~CSTOPB
;
2304 if (XINT (tem
) == 2)
2305 attr
.c_cflag
|= CSTOPB
;
2307 /* Don't error on 1 stopbit, which should be set by cfmakeraw. */
2308 if (XINT (tem
) != 1)
2309 error ("Stopbits cannot be configured");
2311 childp2
= Fplist_put (childp2
, QCstopbits
, tem
);
2313 /* Configure flowcontrol. */
2314 if (!NILP (Fplist_member (contact
, QCflowcontrol
)))
2315 tem
= Fplist_get (contact
, QCflowcontrol
);
2317 tem
= Fplist_get (p
->childp
, QCflowcontrol
);
2318 if (!NILP (tem
) && !EQ (tem
, Qhw
) && !EQ (tem
, Qsw
))
2319 error (":flowcontrol must be nil (no flowcontrol), `hw', or `sw'");
2320 #if defined (CRTSCTS)
2321 attr
.c_cflag
&= ~CRTSCTS
;
2323 #if defined (CNEW_RTSCTS)
2324 attr
.c_cflag
&= ~CNEW_RTSCTS
;
2326 #if defined (IXON) && defined (IXOFF)
2327 attr
.c_iflag
&= ~(IXON
| IXOFF
);
2331 /* Already configured. */
2333 else if (EQ (tem
, Qhw
))
2335 #if defined (CRTSCTS)
2336 attr
.c_cflag
|= CRTSCTS
;
2337 #elif defined (CNEW_RTSCTS)
2338 attr
.c_cflag
|= CNEW_RTSCTS
;
2340 error ("Hardware flowcontrol (RTS/CTS) not supported");
2343 else if (EQ (tem
, Qsw
))
2345 #if defined (IXON) && defined (IXOFF)
2346 attr
.c_iflag
|= (IXON
| IXOFF
);
2348 error ("Software flowcontrol (XON/XOFF) not supported");
2351 childp2
= Fplist_put (childp2
, QCflowcontrol
, tem
);
2353 /* Activate configuration. */
2354 err
= tcsetattr (p
->outfd
, TCSANOW
, &attr
);
2356 error ("tcsetattr() failed: %s", emacs_strerror (errno
));
2358 childp2
= Fplist_put (childp2
, QCsummary
, build_string (summary
));
2359 pset_childp (p
, childp2
);
2361 #endif /* not DOS_NT */
2363 /* System depended enumeration of and access to system processes a-la ps(1). */
2367 /* Process enumeration and access via /proc. */
2370 list_system_processes (void)
2372 Lisp_Object procdir
, match
, proclist
, next
;
2373 struct gcpro gcpro1
, gcpro2
;
2374 register Lisp_Object tail
;
2376 GCPRO2 (procdir
, match
);
2377 /* For every process on the system, there's a directory in the
2378 "/proc" pseudo-directory whose name is the numeric ID of that
2380 procdir
= build_string ("/proc");
2381 match
= build_string ("[0-9]+");
2382 proclist
= directory_files_internal (procdir
, Qnil
, match
, Qt
, 0, Qnil
);
2384 /* `proclist' gives process IDs as strings. Destructively convert
2385 each string into a number. */
2386 for (tail
= proclist
; CONSP (tail
); tail
= next
)
2389 XSETCAR (tail
, Fstring_to_number (XCAR (tail
), Qnil
));
2393 /* directory_files_internal returns the files in reverse order; undo
2395 proclist
= Fnreverse (proclist
);
2399 #elif defined BSD_SYSTEM
2402 list_system_processes (void)
2404 #if defined DARWIN_OS || defined __NetBSD__ || defined __OpenBSD__
2405 int mib
[] = {CTL_KERN
, KERN_PROC
, KERN_PROC_ALL
};
2407 int mib
[] = {CTL_KERN
, KERN_PROC
, KERN_PROC_PROC
};
2410 struct kinfo_proc
*procs
;
2413 struct gcpro gcpro1
;
2414 Lisp_Object proclist
= Qnil
;
2416 if (sysctl (mib
, 3, NULL
, &len
, NULL
, 0) != 0)
2419 procs
= xmalloc (len
);
2420 if (sysctl (mib
, 3, procs
, &len
, NULL
, 0) != 0)
2427 len
/= sizeof (struct kinfo_proc
);
2428 for (i
= 0; i
< len
; i
++)
2430 #if defined DARWIN_OS || defined __NetBSD__
2431 proclist
= Fcons (make_fixnum_or_float (procs
[i
].kp_proc
.p_pid
), proclist
);
2432 #elif defined __OpenBSD__
2433 proclist
= Fcons (make_fixnum_or_float (procs
[i
].p_pid
), proclist
);
2435 proclist
= Fcons (make_fixnum_or_float (procs
[i
].ki_pid
), proclist
);
2445 /* The WINDOWSNT implementation is in w32.c.
2446 The MSDOS implementation is in dosfns.c. */
2447 #elif !defined (WINDOWSNT) && !defined (MSDOS)
2450 list_system_processes (void)
2455 #endif /* !defined (WINDOWSNT) */
2459 time_from_jiffies (unsigned long long tval
, long hz
)
2461 unsigned long long s
= tval
/ hz
;
2462 unsigned long long frac
= tval
% hz
;
2465 if (TYPE_MAXIMUM (time_t) < s
)
2467 if (LONG_MAX
- 1 <= ULLONG_MAX
/ EMACS_TIME_RESOLUTION
2468 || frac
<= ULLONG_MAX
/ EMACS_TIME_RESOLUTION
)
2469 ns
= frac
* EMACS_TIME_RESOLUTION
/ hz
;
2472 /* This is reachable only in the unlikely case that HZ * HZ
2473 exceeds ULLONG_MAX. It calculates an approximation that is
2474 guaranteed to be in range. */
2475 long hz_per_ns
= (hz
/ EMACS_TIME_RESOLUTION
2476 + (hz
% EMACS_TIME_RESOLUTION
!= 0));
2477 ns
= frac
/ hz_per_ns
;
2480 return make_emacs_time (s
, ns
);
2484 ltime_from_jiffies (unsigned long long tval
, long hz
)
2486 EMACS_TIME t
= time_from_jiffies (tval
, hz
);
2487 return make_lisp_time (t
);
2494 EMACS_TIME up
= make_emacs_time (0, 0);
2497 fup
= fopen ("/proc/uptime", "r");
2501 unsigned long long upsec
, upfrac
, idlesec
, idlefrac
;
2502 int upfrac_start
, upfrac_end
, idlefrac_start
, idlefrac_end
;
2504 if (fscanf (fup
, "%llu.%n%llu%n %llu.%n%llu%n",
2505 &upsec
, &upfrac_start
, &upfrac
, &upfrac_end
,
2506 &idlesec
, &idlefrac_start
, &idlefrac
, &idlefrac_end
)
2509 if (TYPE_MAXIMUM (time_t) < upsec
)
2511 upsec
= TYPE_MAXIMUM (time_t);
2512 upfrac
= EMACS_TIME_RESOLUTION
- 1;
2516 int upfraclen
= upfrac_end
- upfrac_start
;
2517 for (; upfraclen
< LOG10_EMACS_TIME_RESOLUTION
; upfraclen
++)
2519 for (; LOG10_EMACS_TIME_RESOLUTION
< upfraclen
; upfraclen
--)
2521 upfrac
= min (upfrac
, EMACS_TIME_RESOLUTION
- 1);
2523 up
= make_emacs_time (upsec
, upfrac
);
2532 #define MAJOR(d) (((unsigned)(d) >> 8) & 0xfff)
2533 #define MINOR(d) (((unsigned)(d) & 0xff) | (((unsigned)(d) & 0xfff00000) >> 12))
2536 procfs_ttyname (int rdev
)
2539 char name
[PATH_MAX
];
2542 fdev
= fopen ("/proc/tty/drivers", "r");
2547 unsigned long minor_beg
, minor_end
;
2548 char minor
[25]; /* 2 32-bit numbers + dash */
2551 while (!feof (fdev
) && !ferror (fdev
))
2553 if (3 <= fscanf (fdev
, "%*s %s %u %s %*s\n", name
, &major
, minor
)
2554 && major
== MAJOR (rdev
))
2556 minor_beg
= strtoul (minor
, &endp
, 0);
2558 minor_end
= minor_beg
;
2559 else if (*endp
== '-')
2560 minor_end
= strtoul (endp
+ 1, &endp
, 0);
2564 if (MINOR (rdev
) >= minor_beg
&& MINOR (rdev
) <= minor_end
)
2566 sprintf (name
+ strlen (name
), "%u", MINOR (rdev
));
2574 return build_string (name
);
2577 static unsigned long
2578 procfs_get_total_memory (void)
2581 unsigned long retval
= 2 * 1024 * 1024; /* default: 2GB */
2584 fmem
= fopen ("/proc/meminfo", "r");
2588 unsigned long entry_value
;
2589 char entry_name
[20]; /* the longest I saw is 13+1 */
2591 while (!feof (fmem
) && !ferror (fmem
))
2593 if (2 <= fscanf (fmem
, "%s %lu kB\n", entry_name
, &entry_value
)
2594 && strcmp (entry_name
, "MemTotal:") == 0)
2596 retval
= entry_value
;
2607 system_process_attributes (Lisp_Object pid
)
2609 char procfn
[PATH_MAX
], fn
[PATH_MAX
];
2613 long clocks_per_sec
;
2615 char procbuf
[1025], *p
, *q
;
2618 static char const default_cmd
[] = "???";
2619 const char *cmd
= default_cmd
;
2620 int cmdsize
= sizeof default_cmd
- 1;
2621 char *cmdline
= NULL
;
2622 ptrdiff_t cmdline_size
;
2625 int ppid
, pgrp
, sess
, tty
, tpgid
, thcount
;
2628 unsigned long long u_time
, s_time
, cutime
, cstime
, start
;
2629 long priority
, niceness
, rss
;
2630 unsigned long minflt
, majflt
, cminflt
, cmajflt
, vsize
;
2631 EMACS_TIME tnow
, tstart
, tboot
, telapsed
, us_time
;
2633 Lisp_Object attrs
= Qnil
;
2634 Lisp_Object cmd_str
, decoded_cmd
, tem
;
2635 struct gcpro gcpro1
, gcpro2
;
2637 CHECK_NUMBER_OR_FLOAT (pid
);
2638 CONS_TO_INTEGER (pid
, pid_t
, proc_id
);
2639 sprintf (procfn
, "/proc/%"pMd
, proc_id
);
2640 if (stat (procfn
, &st
) < 0)
2643 GCPRO2 (attrs
, decoded_cmd
);
2647 attrs
= Fcons (Fcons (Qeuid
, make_fixnum_or_float (uid
)), attrs
);
2649 pw
= getpwuid (uid
);
2652 attrs
= Fcons (Fcons (Quser
, build_string (pw
->pw_name
)), attrs
);
2655 attrs
= Fcons (Fcons (Qegid
, make_fixnum_or_float (gid
)), attrs
);
2657 gr
= getgrgid (gid
);
2660 attrs
= Fcons (Fcons (Qgroup
, build_string (gr
->gr_name
)), attrs
);
2662 strcpy (fn
, procfn
);
2663 procfn_end
= fn
+ strlen (fn
);
2664 strcpy (procfn_end
, "/stat");
2665 fd
= emacs_open (fn
, O_RDONLY
, 0);
2666 if (fd
>= 0 && (nread
= emacs_read (fd
, procbuf
, sizeof (procbuf
) - 1)) > 0)
2668 procbuf
[nread
] = '\0';
2671 p
= strchr (p
, '(');
2674 q
= strrchr (p
+ 1, ')');
2684 /* Command name is encoded in locale-coding-system; decode it. */
2685 cmd_str
= make_unibyte_string (cmd
, cmdsize
);
2686 decoded_cmd
= code_convert_string_norecord (cmd_str
,
2687 Vlocale_coding_system
, 0);
2688 attrs
= Fcons (Fcons (Qcomm
, decoded_cmd
), attrs
);
2692 EMACS_INT ppid_eint
, pgrp_eint
, sess_eint
, tpgid_eint
, thcount_eint
;
2694 /* state ppid pgrp sess tty tpgid . minflt cminflt majflt cmajflt utime stime cutime cstime priority nice thcount . start vsize rss */
2695 sscanf (p
, "%c %d %d %d %d %d %*u %lu %lu %lu %lu %Lu %Lu %Lu %Lu %ld %ld %d %*d %Lu %lu %ld",
2696 &c
, &ppid
, &pgrp
, &sess
, &tty
, &tpgid
,
2697 &minflt
, &cminflt
, &majflt
, &cmajflt
,
2698 &u_time
, &s_time
, &cutime
, &cstime
,
2699 &priority
, &niceness
, &thcount
, &start
, &vsize
, &rss
);
2704 state_str
[1] = '\0';
2705 tem
= build_string (state_str
);
2706 attrs
= Fcons (Fcons (Qstate
, tem
), attrs
);
2708 /* Stops GCC whining about limited range of data type. */
2713 thcount_eint
= thcount
;
2714 attrs
= Fcons (Fcons (Qppid
, make_fixnum_or_float (ppid_eint
)), attrs
);
2715 attrs
= Fcons (Fcons (Qpgrp
, make_fixnum_or_float (pgrp_eint
)), attrs
);
2716 attrs
= Fcons (Fcons (Qsess
, make_fixnum_or_float (sess_eint
)), attrs
);
2717 attrs
= Fcons (Fcons (Qttname
, procfs_ttyname (tty
)), attrs
);
2718 attrs
= Fcons (Fcons (Qtpgid
, make_fixnum_or_float (tpgid_eint
)), attrs
);
2719 attrs
= Fcons (Fcons (Qminflt
, make_fixnum_or_float (minflt
)), attrs
);
2720 attrs
= Fcons (Fcons (Qmajflt
, make_fixnum_or_float (majflt
)), attrs
);
2721 attrs
= Fcons (Fcons (Qcminflt
, make_fixnum_or_float (cminflt
)), attrs
);
2722 attrs
= Fcons (Fcons (Qcmajflt
, make_fixnum_or_float (cmajflt
)), attrs
);
2723 clocks_per_sec
= sysconf (_SC_CLK_TCK
);
2724 if (clocks_per_sec
< 0)
2725 clocks_per_sec
= 100;
2726 attrs
= Fcons (Fcons (Qutime
,
2727 ltime_from_jiffies (u_time
, clocks_per_sec
)),
2729 attrs
= Fcons (Fcons (Qstime
,
2730 ltime_from_jiffies (s_time
, clocks_per_sec
)),
2732 attrs
= Fcons (Fcons (Qtime
,
2733 ltime_from_jiffies (s_time
+ u_time
,
2736 attrs
= Fcons (Fcons (Qcutime
,
2737 ltime_from_jiffies (cutime
, clocks_per_sec
)),
2739 attrs
= Fcons (Fcons (Qcstime
,
2740 ltime_from_jiffies (cstime
, clocks_per_sec
)),
2742 attrs
= Fcons (Fcons (Qctime
,
2743 ltime_from_jiffies (cstime
+cutime
, clocks_per_sec
)),
2745 attrs
= Fcons (Fcons (Qpri
, make_number (priority
)), attrs
);
2746 attrs
= Fcons (Fcons (Qnice
, make_number (niceness
)), attrs
);
2747 attrs
= Fcons (Fcons (Qthcount
, make_fixnum_or_float (thcount_eint
)), attrs
);
2748 tnow
= current_emacs_time ();
2749 telapsed
= get_up_time ();
2750 tboot
= sub_emacs_time (tnow
, telapsed
);
2751 tstart
= time_from_jiffies (start
, clocks_per_sec
);
2752 tstart
= add_emacs_time (tboot
, tstart
);
2753 attrs
= Fcons (Fcons (Qstart
, make_lisp_time (tstart
)), attrs
);
2754 attrs
= Fcons (Fcons (Qvsize
, make_fixnum_or_float (vsize
/1024)), attrs
);
2755 attrs
= Fcons (Fcons (Qrss
, make_fixnum_or_float (4*rss
)), attrs
);
2756 telapsed
= sub_emacs_time (tnow
, tstart
);
2757 attrs
= Fcons (Fcons (Qetime
, make_lisp_time (telapsed
)), attrs
);
2758 us_time
= time_from_jiffies (u_time
+ s_time
, clocks_per_sec
);
2759 pcpu
= (EMACS_TIME_TO_DOUBLE (us_time
)
2760 / EMACS_TIME_TO_DOUBLE (telapsed
));
2763 attrs
= Fcons (Fcons (Qpcpu
, make_float (100 * pcpu
)), attrs
);
2764 pmem
= 4.0 * 100 * rss
/ procfs_get_total_memory ();
2767 attrs
= Fcons (Fcons (Qpmem
, make_float (pmem
)), attrs
);
2774 strcpy (procfn_end
, "/cmdline");
2775 fd
= emacs_open (fn
, O_RDONLY
, 0);
2779 for (cmdline_size
= 0; cmdline_size
< STRING_BYTES_BOUND
; cmdline_size
++)
2781 if (emacs_read (fd
, &ch
, 1) != 1)
2784 if (c_isspace (c
) || c
== '\\')
2785 cmdline_size
++; /* for later quoting, see below */
2789 cmdline
= xmalloc (cmdline_size
+ 1);
2790 lseek (fd
, 0L, SEEK_SET
);
2792 if ((nread
= read (fd
, cmdline
, cmdline_size
)) >= 0)
2793 cmdline
[nread
++] = '\0';
2796 /* Assigning zero to `nread' makes us skip the following
2797 two loops, assign zero to cmdline_size, and enter the
2798 following `if' clause that handles unknown command
2802 /* We don't want trailing null characters. */
2803 for (p
= cmdline
+ nread
; p
> cmdline
+ 1 && !p
[-1]; p
--)
2805 for (p
= cmdline
; p
< cmdline
+ nread
; p
++)
2807 /* Escape-quote whitespace and backslashes. */
2808 if (c_isspace (*p
) || *p
== '\\')
2810 memmove (p
+ 1, p
, nread
- (p
- cmdline
));
2814 else if (*p
== '\0')
2817 cmdline_size
= nread
;
2821 cmdline_size
= cmdsize
+ 2;
2822 cmdline
= xmalloc (cmdline_size
+ 1);
2823 sprintf (cmdline
, "[%.*s]", cmdsize
, cmd
);
2826 /* Command line is encoded in locale-coding-system; decode it. */
2827 cmd_str
= make_unibyte_string (cmdline
, cmdline_size
);
2828 decoded_cmd
= code_convert_string_norecord (cmd_str
,
2829 Vlocale_coding_system
, 0);
2831 attrs
= Fcons (Fcons (Qargs
, decoded_cmd
), attrs
);
2838 #elif defined (SOLARIS2) && defined (HAVE_PROCFS)
2840 /* The <procfs.h> header does not like to be included if _LP64 is defined and
2841 __FILE_OFFSET_BITS == 64. This is an ugly workaround that. */
2842 #if !defined (_LP64) && defined (_FILE_OFFSET_BITS) && (_FILE_OFFSET_BITS == 64)
2843 #define PROCFS_FILE_OFFSET_BITS_HACK 1
2844 #undef _FILE_OFFSET_BITS
2846 #define PROCFS_FILE_OFFSET_BITS_HACK 0
2851 #if PROCFS_FILE_OFFSET_BITS_HACK == 1
2852 #define _FILE_OFFSET_BITS 64
2853 #ifdef _FILE_OFFSET_BITS /* Avoid unused-macro warnings. */
2855 #endif /* PROCFS_FILE_OFFSET_BITS_HACK == 1 */
2858 system_process_attributes (Lisp_Object pid
)
2860 char procfn
[PATH_MAX
], fn
[PATH_MAX
];
2865 struct psinfo pinfo
;
2871 Lisp_Object attrs
= Qnil
;
2872 Lisp_Object decoded_cmd
, tem
;
2873 struct gcpro gcpro1
, gcpro2
;
2875 CHECK_NUMBER_OR_FLOAT (pid
);
2876 CONS_TO_INTEGER (pid
, pid_t
, proc_id
);
2877 sprintf (procfn
, "/proc/%"pMd
, proc_id
);
2878 if (stat (procfn
, &st
) < 0)
2881 GCPRO2 (attrs
, decoded_cmd
);
2885 attrs
= Fcons (Fcons (Qeuid
, make_fixnum_or_float (uid
)), attrs
);
2887 pw
= getpwuid (uid
);
2890 attrs
= Fcons (Fcons (Quser
, build_string (pw
->pw_name
)), attrs
);
2893 attrs
= Fcons (Fcons (Qegid
, make_fixnum_or_float (gid
)), attrs
);
2895 gr
= getgrgid (gid
);
2898 attrs
= Fcons (Fcons (Qgroup
, build_string (gr
->gr_name
)), attrs
);
2900 strcpy (fn
, procfn
);
2901 procfn_end
= fn
+ strlen (fn
);
2902 strcpy (procfn_end
, "/psinfo");
2903 fd
= emacs_open (fn
, O_RDONLY
, 0);
2905 && (nread
= read (fd
, (char*)&pinfo
, sizeof (struct psinfo
)) > 0))
2907 attrs
= Fcons (Fcons (Qppid
, make_fixnum_or_float (pinfo
.pr_ppid
)), attrs
);
2908 attrs
= Fcons (Fcons (Qpgrp
, make_fixnum_or_float (pinfo
.pr_pgid
)), attrs
);
2909 attrs
= Fcons (Fcons (Qsess
, make_fixnum_or_float (pinfo
.pr_sid
)), attrs
);
2913 state_str
[0] = pinfo
.pr_lwp
.pr_sname
;
2914 state_str
[1] = '\0';
2915 tem
= build_string (state_str
);
2916 attrs
= Fcons (Fcons (Qstate
, tem
), attrs
);
2919 /* FIXME: missing Qttyname. psinfo.pr_ttydev is a dev_t,
2920 need to get a string from it. */
2922 /* FIXME: missing: Qtpgid */
2934 Are they available? */
2936 attrs
= Fcons (Fcons (Qtime
, make_lisp_time (pinfo
.pr_time
)), attrs
);
2937 attrs
= Fcons (Fcons (Qctime
, make_lisp_time (pinfo
.pr_ctime
)), attrs
);
2938 attrs
= Fcons (Fcons (Qpri
, make_number (pinfo
.pr_lwp
.pr_pri
)), attrs
);
2939 attrs
= Fcons (Fcons (Qnice
, make_number (pinfo
.pr_lwp
.pr_nice
)), attrs
);
2940 attrs
= Fcons (Fcons (Qthcount
, make_fixnum_or_float (pinfo
.pr_nlwp
)), attrs
);
2942 attrs
= Fcons (Fcons (Qstart
, make_lisp_time (pinfo
.pr_start
)), attrs
);
2943 attrs
= Fcons (Fcons (Qvsize
, make_fixnum_or_float (pinfo
.pr_size
)), attrs
);
2944 attrs
= Fcons (Fcons (Qrss
, make_fixnum_or_float (pinfo
.pr_rssize
)), attrs
);
2946 /* pr_pctcpu and pr_pctmem are unsigned integers in the
2947 range 0 .. 2**15, representing 0.0 .. 1.0. */
2948 attrs
= Fcons (Fcons (Qpcpu
, make_float (100.0 / 0x8000 * pinfo
.pr_pctcpu
)), attrs
);
2949 attrs
= Fcons (Fcons (Qpmem
, make_float (100.0 / 0x8000 * pinfo
.pr_pctmem
)), attrs
);
2952 = code_convert_string_norecord (make_unibyte_string (pinfo
.pr_fname
,
2953 strlen (pinfo
.pr_fname
)),
2954 Vlocale_coding_system
, 0);
2955 attrs
= Fcons (Fcons (Qcomm
, decoded_cmd
), attrs
);
2957 = code_convert_string_norecord (make_unibyte_string (pinfo
.pr_psargs
,
2958 strlen (pinfo
.pr_psargs
)),
2959 Vlocale_coding_system
, 0);
2960 attrs
= Fcons (Fcons (Qargs
, decoded_cmd
), attrs
);
2970 #elif defined __FreeBSD__
2973 timeval_to_EMACS_TIME (struct timeval t
)
2975 return make_emacs_time (t
.tv_sec
, t
.tv_usec
* 1000);
2979 make_lisp_timeval (struct timeval t
)
2981 return make_lisp_time (timeval_to_EMACS_TIME (t
));
2985 system_process_attributes (Lisp_Object pid
)
2988 int pagesize
= getpagesize ();
2995 char args
[MAXPATHLEN
];
2998 int mib
[4] = {CTL_KERN
, KERN_PROC
, KERN_PROC_PID
};
2999 struct kinfo_proc proc
;
3000 size_t proclen
= sizeof proc
;
3002 struct gcpro gcpro1
, gcpro2
;
3003 Lisp_Object attrs
= Qnil
;
3004 Lisp_Object decoded_comm
;
3006 CHECK_NUMBER_OR_FLOAT (pid
);
3007 CONS_TO_INTEGER (pid
, int, proc_id
);
3010 if (sysctl (mib
, 4, &proc
, &proclen
, NULL
, 0) != 0)
3013 GCPRO2 (attrs
, decoded_comm
);
3015 attrs
= Fcons (Fcons (Qeuid
, make_fixnum_or_float (proc
.ki_uid
)), attrs
);
3018 pw
= getpwuid (proc
.ki_uid
);
3021 attrs
= Fcons (Fcons (Quser
, build_string (pw
->pw_name
)), attrs
);
3023 attrs
= Fcons (Fcons (Qegid
, make_fixnum_or_float (proc
.ki_svgid
)), attrs
);
3026 gr
= getgrgid (proc
.ki_svgid
);
3029 attrs
= Fcons (Fcons (Qgroup
, build_string (gr
->gr_name
)), attrs
);
3031 decoded_comm
= code_convert_string_norecord
3032 (make_unibyte_string (proc
.ki_comm
, strlen (proc
.ki_comm
)),
3033 Vlocale_coding_system
, 0);
3035 attrs
= Fcons (Fcons (Qcomm
, decoded_comm
), attrs
);
3037 char state
[2] = {'\0', '\0'};
3038 switch (proc
.ki_stat
)
3060 attrs
= Fcons (Fcons (Qstate
, build_string (state
)), attrs
);
3063 attrs
= Fcons (Fcons (Qppid
, make_fixnum_or_float (proc
.ki_ppid
)), attrs
);
3064 attrs
= Fcons (Fcons (Qpgrp
, make_fixnum_or_float (proc
.ki_pgid
)), attrs
);
3065 attrs
= Fcons (Fcons (Qsess
, make_fixnum_or_float (proc
.ki_sid
)), attrs
);
3068 ttyname
= proc
.ki_tdev
== NODEV
? NULL
: devname (proc
.ki_tdev
, S_IFCHR
);
3071 attrs
= Fcons (Fcons (Qtty
, build_string (ttyname
)), attrs
);
3073 attrs
= Fcons (Fcons (Qtpgid
, make_fixnum_or_float (proc
.ki_tpgid
)), attrs
);
3074 attrs
= Fcons (Fcons (Qminflt
, make_fixnum_or_float (proc
.ki_rusage
.ru_minflt
)), attrs
);
3075 attrs
= Fcons (Fcons (Qmajflt
, make_fixnum_or_float (proc
.ki_rusage
.ru_majflt
)), attrs
);
3076 attrs
= Fcons (Fcons (Qcminflt
, make_number (proc
.ki_rusage_ch
.ru_minflt
)), attrs
);
3077 attrs
= Fcons (Fcons (Qcmajflt
, make_number (proc
.ki_rusage_ch
.ru_majflt
)), attrs
);
3079 attrs
= Fcons (Fcons (Qutime
, make_lisp_timeval (proc
.ki_rusage
.ru_utime
)),
3081 attrs
= Fcons (Fcons (Qstime
, make_lisp_timeval (proc
.ki_rusage
.ru_stime
)),
3083 t
= add_emacs_time (timeval_to_EMACS_TIME (proc
.ki_rusage
.ru_utime
),
3084 timeval_to_EMACS_TIME (proc
.ki_rusage
.ru_stime
));
3085 attrs
= Fcons (Fcons (Qtime
, make_lisp_time (t
)), attrs
);
3087 attrs
= Fcons (Fcons (Qcutime
,
3088 make_lisp_timeval (proc
.ki_rusage_ch
.ru_utime
)),
3090 attrs
= Fcons (Fcons (Qcstime
,
3091 make_lisp_timeval (proc
.ki_rusage_ch
.ru_utime
)),
3093 t
= add_emacs_time (timeval_to_EMACS_TIME (proc
.ki_rusage_ch
.ru_utime
),
3094 timeval_to_EMACS_TIME (proc
.ki_rusage_ch
.ru_stime
));
3095 attrs
= Fcons (Fcons (Qctime
, make_lisp_time (t
)), attrs
);
3097 attrs
= Fcons (Fcons (Qthcount
, make_fixnum_or_float (proc
.ki_numthreads
)),
3099 attrs
= Fcons (Fcons (Qpri
, make_number (proc
.ki_pri
.pri_native
)), attrs
);
3100 attrs
= Fcons (Fcons (Qnice
, make_number (proc
.ki_nice
)), attrs
);
3101 attrs
= Fcons (Fcons (Qstart
, make_lisp_timeval (proc
.ki_start
)), attrs
);
3102 attrs
= Fcons (Fcons (Qvsize
, make_number (proc
.ki_size
>> 10)), attrs
);
3103 attrs
= Fcons (Fcons (Qrss
, make_number (proc
.ki_rssize
* pagesize
>> 10)),
3106 now
= current_emacs_time ();
3107 t
= sub_emacs_time (now
, timeval_to_EMACS_TIME (proc
.ki_start
));
3108 attrs
= Fcons (Fcons (Qetime
, make_lisp_time (t
)), attrs
);
3110 len
= sizeof fscale
;
3111 if (sysctlbyname ("kern.fscale", &fscale
, &len
, NULL
, 0) == 0)
3116 if (sysctlbyname ("kern.ccpu", &ccpu
, &len
, NULL
, 0) == 0)
3118 pcpu
= (100.0 * proc
.ki_pctcpu
/ fscale
3119 / (1 - exp (proc
.ki_swtime
* log ((double) ccpu
/ fscale
))));
3120 attrs
= Fcons (Fcons (Qpcpu
, make_fixnum_or_float (pcpu
)), attrs
);
3124 len
= sizeof npages
;
3125 if (sysctlbyname ("hw.availpages", &npages
, &len
, NULL
, 0) == 0)
3127 double pmem
= (proc
.ki_flag
& P_INMEM
3128 ? 100.0 * proc
.ki_rssize
/ npages
3130 attrs
= Fcons (Fcons (Qpmem
, make_fixnum_or_float (pmem
)), attrs
);
3133 mib
[2] = KERN_PROC_ARGS
;
3135 if (sysctl (mib
, 4, args
, &len
, NULL
, 0) == 0)
3138 for (i
= 0; i
< len
; i
++)
3140 if (! args
[i
] && i
< len
- 1)
3145 (code_convert_string_norecord
3146 (build_unibyte_string (args
),
3147 Vlocale_coding_system
, 0));
3149 attrs
= Fcons (Fcons (Qargs
, decoded_comm
), attrs
);
3156 /* The WINDOWSNT implementation is in w32.c.
3157 The MSDOS implementation is in dosfns.c. */
3158 #elif !defined (WINDOWSNT) && !defined (MSDOS)
3161 system_process_attributes (Lisp_Object pid
)
3166 #endif /* !defined (WINDOWSNT) */