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/>. */
28 #endif /* HAVE_PWD_H */
32 #include <allocator.h>
33 #include <careadlinkat.h>
34 #include <ignore-value.h>
38 #include "sysselect.h"
39 #include "blockinput.h"
42 #include <sys/sysctl.h>
44 #include <sys/resource.h>
49 #include <sys/sysctl.h>
54 #define write sys_write
56 #endif /* not WINDOWSNT */
58 #include <sys/types.h>
65 #define setpgrp setpgid
69 /* Get SI_SRPC_DOMAIN, if it is available. */
70 #ifdef HAVE_SYS_SYSTEMINFO_H
71 #include <sys/systeminfo.h>
74 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida, MW Aug 1993 */
78 #include <sys/param.h>
87 #ifdef HAVE_SYS_UTSNAME_H
88 #include <sys/utsname.h>
90 #endif /* HAVE_SYS_UTSNAME_H */
95 #include "termhooks.h"
98 #include "dispextern.h"
100 #include "cm.h" /* for reset_sys_modes */
104 /* In process.h which conflicts with the local copy. */
106 int _cdecl
_spawnlp (int, const char *, const char *, ...);
107 int _cdecl
_getpid (void);
108 extern char *getwd (char *);
111 #include "syssignal.h"
114 static int emacs_get_tty (int, struct emacs_tty
*);
115 static int emacs_set_tty (int, struct emacs_tty
*, int);
116 #if defined TIOCNOTTY || defined USG5 || defined CYGWIN
117 static _Noreturn
void croak (char *);
120 /* Declare here, including term.h is problematic on some systems. */
121 extern void tputs (const char *, int, int (*)(int));
123 static const int baud_convert
[] =
125 0, 50, 75, 110, 135, 150, 200, 300, 600, 1200,
126 1800, 2400, 4800, 9600, 19200, 38400
130 #if !defined (HAVE_GET_CURRENT_DIR_NAME) || defined (BROKEN_GET_CURRENT_DIR_NAME)
132 /* Return the current working directory. Returns NULL on errors.
133 Any other returned value must be freed with free. This is used
134 only when get_current_dir_name is not defined on the system. */
136 get_current_dir_name (void)
140 struct stat dotstat
, pwdstat
;
141 /* If PWD is accurate, use it instead of calling getwd. PWD is
142 sometimes a nicer name, and using it may avoid a fatal error if a
143 parent directory is searchable but not readable. */
144 if ((pwd
= getenv ("PWD")) != 0
145 && (IS_DIRECTORY_SEP (*pwd
) || (*pwd
&& IS_DEVICE_SEP (pwd
[1])))
146 && stat (pwd
, &pwdstat
) == 0
147 && stat (".", &dotstat
) == 0
148 && dotstat
.st_ino
== pwdstat
.st_ino
149 && dotstat
.st_dev
== pwdstat
.st_dev
151 && strlen (pwd
) < MAXPATHLEN
155 buf
= (char *) malloc (strlen (pwd
) + 1);
163 size_t buf_size
= 1024;
164 buf
= (char *) malloc (buf_size
);
169 if (getcwd (buf
, buf_size
) == buf
)
173 int tmp_errno
= errno
;
179 buf
= (char *) realloc (buf
, buf_size
);
187 /* We need MAXPATHLEN here. */
188 buf
= (char *) malloc (MAXPATHLEN
+ 1);
191 if (getwd (buf
) == NULL
)
193 int tmp_errno
= errno
;
205 /* Discard pending input on all input descriptors. */
208 discard_tty_input (void)
211 struct emacs_tty buf
;
216 #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */
217 while (dos_keyread () != -1)
219 #else /* not MSDOS */
221 struct tty_display_info
*tty
;
222 for (tty
= tty_list
; tty
; tty
= tty
->next
)
224 if (tty
->input
) /* Is the device suspended? */
226 emacs_get_tty (fileno (tty
->input
), &buf
);
227 emacs_set_tty (fileno (tty
->input
), &buf
, 0);
231 #endif /* not MSDOS */
232 #endif /* not WINDOWSNT */
238 /* Arrange for character C to be read as the next input from
240 XXX What if we have multiple ttys?
246 if (! FRAME_TERMCAP_P (SELECTED_FRAME ()))
249 /* Should perhaps error if in batch mode */
251 ioctl (fileno (CURTTY()->input
), TIOCSTI
, &c
);
252 #else /* no TIOCSTI */
253 error ("Cannot stuff terminal input characters in this version of Unix");
254 #endif /* no TIOCSTI */
260 init_baud_rate (int fd
)
270 #else /* not DOS_NT */
275 emacs_ospeed
= cfgetospeed (&sg
);
276 #endif /* not DOS_NT */
279 baud_rate
= (emacs_ospeed
< sizeof baud_convert
/ sizeof baud_convert
[0]
280 ? baud_convert
[emacs_ospeed
] : 9600);
287 /* Set nonzero to make following function work under dbx
288 (at least for bsd). */
289 int wait_debugging EXTERNALLY_VISIBLE
;
294 wait_for_termination_1 (pid_t pid
, int interruptible
)
298 #if (defined (BSD_SYSTEM) || defined (HPUX)) && !defined (__GNU__)
299 /* Note that kill returns -1 even if the process is just a zombie now.
300 But inevitably a SIGCHLD interrupt should be generated
301 and child_sig will do wait3 and make the process go away. */
302 /* There is some indication that there is a bug involved with
303 termination of subprocesses, perhaps involving a kernel bug too,
304 but no idea what it is. Just as a hunch we signal SIGCHLD to see
305 if that causes the problem to go away or get worse. */
306 sigsetmask (sigmask (SIGCHLD
));
307 if (0 > kill (pid
, 0))
309 sigsetmask (SIGEMPTYMASK
);
310 kill (getpid (), SIGCHLD
);
316 sigpause (SIGEMPTYMASK
);
317 #else /* not BSD_SYSTEM, and not HPUX version >= 6 */
321 #else /* not WINDOWSNT */
322 sigblock (sigmask (SIGCHLD
));
324 if (kill (pid
, 0) == -1 && errno
== ESRCH
)
326 sigunblock (sigmask (SIGCHLD
));
330 sigsuspend (&empty_mask
);
331 #endif /* not WINDOWSNT */
332 #endif /* not BSD_SYSTEM, and not HPUX version >= 6 */
338 /* Wait for subprocess with process id `pid' to terminate and
339 make sure it will get eliminated (not remain forever as a zombie) */
342 wait_for_termination (pid_t pid
)
344 wait_for_termination_1 (pid
, 0);
347 /* Like the above, but allow keyboard interruption. */
349 interruptible_wait_for_termination (pid_t pid
)
351 wait_for_termination_1 (pid
, 1);
355 * flush any pending output
356 * (may flush input as well; it does not matter the way we use it)
360 flush_pending_output (int channel
)
362 /* FIXME: maybe this function should be removed */
365 /* Set up the terminal at the other end of a pseudo-terminal that
366 we will be controlling an inferior through.
367 It should not echo or do line-editing, since that is done
368 in Emacs. No padding needed for insertion into an Emacs buffer. */
371 child_setup_tty (int out
)
376 emacs_get_tty (out
, &s
);
377 s
.main
.c_oflag
|= OPOST
; /* Enable output postprocessing */
378 s
.main
.c_oflag
&= ~ONLCR
; /* Disable map of NL to CR-NL on output */
380 /* http://lists.gnu.org/archive/html/emacs-devel/2008-05/msg00406.html
381 Some versions of GNU Hurd do not have FFDLY? */
383 s
.main
.c_oflag
&= ~(NLDLY
|CRDLY
|TABDLY
|BSDLY
|VTDLY
|FFDLY
);
384 /* No output delays */
386 s
.main
.c_oflag
&= ~(NLDLY
|CRDLY
|TABDLY
|BSDLY
|VTDLY
);
387 /* No output delays */
390 s
.main
.c_lflag
&= ~ECHO
; /* Disable echo */
391 s
.main
.c_lflag
|= ISIG
; /* Enable signals */
393 s
.main
.c_iflag
&= ~IUCLC
; /* Disable downcasing on input. */
396 s
.main
.c_iflag
&= ~ISTRIP
; /* don't strip 8th bit on input */
399 s
.main
.c_oflag
&= ~OLCUC
; /* Disable upcasing on output. */
401 s
.main
.c_oflag
&= ~TAB3
; /* Disable tab expansion */
402 s
.main
.c_cflag
= (s
.main
.c_cflag
& ~CSIZE
) | CS8
; /* Don't strip 8th bit */
403 s
.main
.c_cc
[VERASE
] = CDISABLE
; /* disable erase processing */
404 s
.main
.c_cc
[VKILL
] = CDISABLE
; /* disable kill processing */
407 s
.main
.c_cflag
= (s
.main
.c_cflag
& ~CBAUD
) | B9600
; /* baud rate sanity */
410 #ifdef SIGNALS_VIA_CHARACTERS
411 /* the QUIT and INTR character are used in process_send_signal
412 so set them here to something useful. */
413 if (s
.main
.c_cc
[VQUIT
] == CDISABLE
)
414 s
.main
.c_cc
[VQUIT
] = '\\'&037; /* Control-\ */
415 if (s
.main
.c_cc
[VINTR
] == CDISABLE
)
416 s
.main
.c_cc
[VINTR
] = 'C'&037; /* Control-C */
417 #endif /* not SIGNALS_VIA_CHARACTERS */
420 /* Also, PTY overloads NUL and BREAK.
421 don't ignore break, but don't signal either, so it looks like NUL. */
422 s
.main
.c_iflag
&= ~IGNBRK
;
423 s
.main
.c_iflag
&= ~BRKINT
;
424 /* rms: Formerly it set s.main.c_cc[VINTR] to 0377 here
425 unconditionally. Then a SIGNALS_VIA_CHARACTERS conditional
426 would force it to 0377. That looks like duplicated code. */
427 s
.main
.c_cflag
= (s
.main
.c_cflag
& ~CBAUD
) | B9600
; /* baud rate sanity */
430 /* We originally enabled ICANON (and set VEOF to 04), and then had
431 process.c send additional EOF chars to flush the output when faced
432 with long lines, but this leads to weird effects when the
433 subprocess has disabled ICANON and ends up seeing those spurious
434 extra EOFs. So we don't send EOFs any more in
435 process.c:send_process. First we tried to disable ICANON by
436 default, so if a subsprocess sets up ICANON, it's his problem (or
437 the Elisp package that talks to it) to deal with lines that are
438 too long. But this disables some features, such as the ability
439 to send EOF signals. So we re-enabled ICANON but there is no
440 more "send eof to flush" going on (which is wrong and unportable
441 in itself). The correct way to handle too much output is to
442 buffer what could not be written and then write it again when
443 select returns ok for writing. This has it own set of
444 problems. Write is now asynchronous, is that a problem? How much
445 do we buffer, and what do we do when that limit is reached? */
447 s
.main
.c_lflag
|= ICANON
; /* Enable line editing and eof processing */
448 s
.main
.c_cc
[VEOF
] = 'D'&037; /* Control-D */
449 #if 0 /* These settings only apply to non-ICANON mode. */
450 s
.main
.c_cc
[VMIN
] = 1;
451 s
.main
.c_cc
[VTIME
] = 0;
454 emacs_set_tty (out
, &s
, 0);
455 #endif /* not WINDOWSNT */
457 #endif /* not MSDOS */
460 /* Record a signal code and the handler for it. */
464 void (*handler
) (int);
467 static void save_signal_handlers (struct save_signal
*);
468 static void restore_signal_handlers (struct save_signal
*);
470 /* Suspend the Emacs process; give terminal to its superior. */
475 #if defined (SIGTSTP) && !defined (MSDOS)
478 int pgrp
= EMACS_GETPGRP (0);
479 EMACS_KILLPG (pgrp
, SIGTSTP
);
482 #else /* No SIGTSTP */
483 /* On a system where suspending is not implemented,
484 instead fork a subshell and let it talk directly to the terminal
488 #endif /* no SIGTSTP */
491 /* Fork a subshell. */
496 #ifdef DOS_NT /* Demacs 1.1.2 91/10/20 Manabu Higashida */
498 char oldwd
[MAXPATHLEN
+1]; /* Fixed length is safe on MSDOS. */
501 struct save_signal saved_handlers
[5];
503 unsigned char *volatile str_volatile
= 0;
507 saved_handlers
[0].code
= SIGINT
;
508 saved_handlers
[1].code
= SIGQUIT
;
509 saved_handlers
[2].code
= SIGTERM
;
511 saved_handlers
[3].code
= SIGIO
;
512 saved_handlers
[4].code
= 0;
514 saved_handlers
[3].code
= 0;
517 /* Mentioning current_buffer->buffer would mean including buffer.h,
518 which somehow wedges the hp compiler. So instead... */
520 dir
= intern ("default-directory");
521 if (NILP (Fboundp (dir
)))
523 dir
= Fsymbol_value (dir
);
527 dir
= expand_and_dir_to_file (Funhandled_file_name_directory (dir
), Qnil
);
528 str_volatile
= str
= (unsigned char *) alloca (SCHARS (dir
) + 2);
530 memcpy (str
, SDATA (dir
), len
);
531 if (str
[len
- 1] != '/') str
[len
++] = '/';
537 save_signal_handlers (saved_handlers
);
538 synch_process_alive
= 1;
542 error ("Can't spawn subshell");
549 #ifdef DOS_NT /* MW, Aug 1993 */
552 sh
= (char *) egetenv ("SUSPEND"); /* KFS, 1994-12-14 */
555 sh
= (char *) egetenv ("SHELL");
559 /* Use our buffer's default directory for the subshell. */
561 if (str
&& chdir ((char *) str
) != 0)
564 ignore_value (write (1, "Can't chdir\n", 12));
569 close_process_descs (); /* Close Emacs's pipes/ptys */
571 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */
573 char *epwd
= getenv ("PWD");
574 char old_pwd
[MAXPATHLEN
+1+4];
576 /* If PWD is set, pass it with corrected value. */
579 strcpy (old_pwd
, epwd
);
580 if (str
[len
- 1] == '/')
582 setenv ("PWD", str
, 1);
585 chdir (oldwd
); /* FIXME: Do the right thing on chdir failure. */
587 putenv (old_pwd
); /* restore previous value */
589 #else /* not MSDOS */
591 /* Waits for process completion */
592 pid
= _spawnlp (_P_WAIT
, sh
, sh
, NULL
);
593 chdir (oldwd
); /* FIXME: Do the right thing on chdir failure. */
595 write (1, "Can't execute subshell", 22);
596 #else /* not WINDOWSNT */
597 execlp (sh
, sh
, (char *) 0);
598 ignore_value (write (1, "Can't execute subshell", 22));
600 #endif /* not WINDOWSNT */
601 #endif /* not MSDOS */
604 /* Do this now if we did not do it before. */
606 save_signal_handlers (saved_handlers
);
607 synch_process_alive
= 1;
611 wait_for_termination (pid
);
613 restore_signal_handlers (saved_handlers
);
614 synch_process_alive
= 0;
618 save_signal_handlers (struct save_signal
*saved_handlers
)
620 while (saved_handlers
->code
)
622 saved_handlers
->handler
623 = (void (*) (int)) signal (saved_handlers
->code
, SIG_IGN
);
629 restore_signal_handlers (struct save_signal
*saved_handlers
)
631 while (saved_handlers
->code
)
633 signal (saved_handlers
->code
, saved_handlers
->handler
);
639 /* If SIGIO is broken, don't do anything. */
656 unrequest_sigio (void)
663 static int old_fcntl_flags
[MAXDESC
];
669 old_fcntl_flags
[fd
] = fcntl (fd
, F_GETFL
, 0) & ~FASYNC
;
670 fcntl (fd
, F_SETFL
, old_fcntl_flags
[fd
] | FASYNC
);
672 interrupts_deferred
= 0;
679 fcntl (fd
, F_SETFL
, old_fcntl_flags
[fd
]);
683 #ifdef FASYNC /* F_SETFL does not imply existence of FASYNC */
684 /* XXX Uhm, FASYNC is not used anymore here. */
685 /* XXX Yeah, but you need it for SIGIO, don't you? */
694 sigunblock (sigmask (SIGWINCH
));
696 sigunblock (sigmask (SIGIO
));
698 interrupts_deferred
= 0;
702 unrequest_sigio (void)
707 #if 0 /* XXX What's wrong with blocking SIGIO under X? */
713 sigblock (sigmask (SIGWINCH
));
715 sigblock (sigmask (SIGIO
));
716 interrupts_deferred
= 1;
719 #else /* no FASYNC */
725 if (noninteractive
|| read_socket_hook
)
728 croak ("request_sigio");
732 unrequest_sigio (void)
734 if (noninteractive
|| read_socket_hook
)
737 croak ("unrequest_sigio");
746 /* Getting and setting emacs_tty structures. */
748 /* Set *TC to the parameters associated with the terminal FD.
749 Return zero if all's well, or -1 if we ran into an error we
750 couldn't deal with. */
752 emacs_get_tty (int fd
, struct emacs_tty
*settings
)
754 /* Retrieve the primary parameters - baud rate, character size, etcetera. */
756 /* We have those nifty POSIX tcmumbleattr functions. */
757 memset (&settings
->main
, 0, sizeof (settings
->main
));
758 if (tcgetattr (fd
, &settings
->main
) < 0)
762 /* We have survived the tempest. */
767 /* Set the parameters of the tty on FD according to the contents of
768 *SETTINGS. If FLUSHP is non-zero, we discard input.
769 Return 0 if all went well, and -1 if anything failed. */
772 emacs_set_tty (int fd
, struct emacs_tty
*settings
, int flushp
)
774 /* Set the primary parameters - baud rate, character size, etcetera. */
777 /* We have those nifty POSIX tcmumbleattr functions.
778 William J. Smith <wjs@wiis.wang.com> writes:
779 "POSIX 1003.1 defines tcsetattr to return success if it was
780 able to perform any of the requested actions, even if some
781 of the requested actions could not be performed.
782 We must read settings back to ensure tty setup properly.
783 AIX requires this to keep tty from hanging occasionally." */
784 /* This make sure that we don't loop indefinitely in here. */
785 for (i
= 0 ; i
< 10 ; i
++)
786 if (tcsetattr (fd
, flushp
? TCSAFLUSH
: TCSADRAIN
, &settings
->main
) < 0)
797 memset (&new, 0, sizeof (new));
798 /* Get the current settings, and see if they're what we asked for. */
799 tcgetattr (fd
, &new);
800 /* We cannot use memcmp on the whole structure here because under
801 * aix386 the termios structure has some reserved field that may
804 if ( new.c_iflag
== settings
->main
.c_iflag
805 && new.c_oflag
== settings
->main
.c_oflag
806 && new.c_cflag
== settings
->main
.c_cflag
807 && new.c_lflag
== settings
->main
.c_lflag
808 && memcmp (new.c_cc
, settings
->main
.c_cc
, NCCS
) == 0)
815 /* We have survived the tempest. */
822 static int old_fcntl_owner
[MAXDESC
];
823 #endif /* F_SETOWN */
825 /* This may also be defined in stdio,
826 but if so, this does no harm,
827 and using the same name avoids wasting the other one's space. */
830 unsigned char _sobuf
[BUFSIZ
+8];
835 /* Initialize the terminal mode on all tty devices that are currently
839 init_all_sys_modes (void)
841 struct tty_display_info
*tty
;
842 for (tty
= tty_list
; tty
; tty
= tty
->next
)
843 init_sys_modes (tty
);
846 /* Initialize the terminal mode on the given tty device. */
849 init_sys_modes (struct tty_display_info
*tty_out
)
851 struct emacs_tty tty
;
852 Lisp_Object terminal
;
854 Vtty_erase_char
= Qnil
;
859 if (!tty_out
->output
)
860 return; /* The tty is suspended. */
862 if (! tty_out
->old_tty
)
863 tty_out
->old_tty
= (struct emacs_tty
*) xmalloc (sizeof (struct emacs_tty
));
865 emacs_get_tty (fileno (tty_out
->input
), tty_out
->old_tty
);
867 tty
= *tty_out
->old_tty
;
869 #if !defined (DOS_NT)
870 XSETINT (Vtty_erase_char
, tty
.main
.c_cc
[VERASE
]);
872 tty
.main
.c_iflag
|= (IGNBRK
); /* Ignore break condition */
873 tty
.main
.c_iflag
&= ~ICRNL
; /* Disable map of CR to NL on input */
874 #ifdef INLCR /* I'm just being cautious,
875 since I can't check how widespread INLCR is--rms. */
876 tty
.main
.c_iflag
&= ~INLCR
; /* Disable map of NL to CR on input */
879 tty
.main
.c_iflag
&= ~ISTRIP
; /* don't strip 8th bit on input */
881 tty
.main
.c_lflag
&= ~ECHO
; /* Disable echo */
882 tty
.main
.c_lflag
&= ~ICANON
; /* Disable erase/kill processing */
884 tty
.main
.c_lflag
&= ~IEXTEN
; /* Disable other editing characters. */
886 tty
.main
.c_lflag
|= ISIG
; /* Enable signals */
887 if (tty_out
->flow_control
)
889 tty
.main
.c_iflag
|= IXON
; /* Enable start/stop output control */
891 tty
.main
.c_iflag
&= ~IXANY
;
895 tty
.main
.c_iflag
&= ~IXON
; /* Disable start/stop output control */
896 tty
.main
.c_oflag
&= ~ONLCR
; /* Disable map of NL to CR-NL
898 tty
.main
.c_oflag
&= ~TAB3
; /* Disable tab expansion */
900 if (tty_out
->meta_key
)
902 tty
.main
.c_cflag
|= CS8
; /* allow 8th bit on input */
903 tty
.main
.c_cflag
&= ~PARENB
;/* Don't check parity */
907 XSETTERMINAL(terminal
, tty_out
->terminal
);
908 if (!NILP (Fcontrolling_tty_p (terminal
)))
910 tty
.main
.c_cc
[VINTR
] = quit_char
; /* C-g (usually) gives SIGINT */
911 /* Set up C-g for both SIGQUIT and SIGINT.
912 We don't know which we will get, but we handle both alike
913 so which one it really gives us does not matter. */
914 tty
.main
.c_cc
[VQUIT
] = quit_char
;
918 /* We normally don't get interrupt or quit signals from tty
919 devices other than our controlling terminal; therefore,
920 we must handle C-g as normal input. Unfortunately, this
921 means that the interrupt and quit feature must be
922 disabled on secondary ttys, or we would not even see the
925 Note that even though emacsclient could have special code
926 to pass SIGINT to Emacs, we should _not_ enable
927 interrupt/quit keys for emacsclient frames. This means
928 that we can't break out of loops in C code from a
929 secondary tty frame, but we can always decide what
930 display the C-g came from, which is more important from a
931 usability point of view. (Consider the case when two
932 people work together using the same Emacs instance.) */
933 tty
.main
.c_cc
[VINTR
] = CDISABLE
;
934 tty
.main
.c_cc
[VQUIT
] = CDISABLE
;
936 tty
.main
.c_cc
[VMIN
] = 1; /* Input should wait for at least 1 char */
937 tty
.main
.c_cc
[VTIME
] = 0; /* no matter how long that takes. */
939 tty
.main
.c_cc
[VSWTCH
] = CDISABLE
; /* Turn off shell layering use
944 tty
.main
.c_cc
[VSUSP
] = CDISABLE
; /* Turn off handling of C-z. */
947 tty
.main
.c_cc
[V_DSUSP
] = CDISABLE
; /* Turn off handling of C-y. */
949 #ifdef VDSUSP /* Some systems have VDSUSP, some have V_DSUSP. */
950 tty
.main
.c_cc
[VDSUSP
] = CDISABLE
;
953 tty
.main
.c_cc
[VLNEXT
] = CDISABLE
;
956 tty
.main
.c_cc
[VREPRINT
] = CDISABLE
;
957 #endif /* VREPRINT */
959 tty
.main
.c_cc
[VWERASE
] = CDISABLE
;
962 tty
.main
.c_cc
[VDISCARD
] = CDISABLE
;
963 #endif /* VDISCARD */
965 if (tty_out
->flow_control
)
968 tty
.main
.c_cc
[VSTART
] = '\021';
971 tty
.main
.c_cc
[VSTOP
] = '\023';
977 tty
.main
.c_cc
[VSTART
] = CDISABLE
;
980 tty
.main
.c_cc
[VSTOP
] = CDISABLE
;
985 tty
.main
.c_cc
[VSTRT
] = CDISABLE
;
986 tty
.main
.c_cc
[VSTOP
] = CDISABLE
;
987 tty
.main
.c_cc
[VSUSP
] = CDISABLE
;
988 tty
.main
.c_cc
[VDSUSP
] = CDISABLE
;
989 if (tty_out
->flow_control
)
992 tty
.main
.c_cc
[VSTART
] = '\021';
995 tty
.main
.c_cc
[VSTOP
] = '\023';
998 /* Also, PTY overloads NUL and BREAK.
999 don't ignore break, but don't signal either, so it looks like NUL.
1000 This really serves a purpose only if running in an XTERM window
1001 or via TELNET or the like, but does no harm elsewhere. */
1002 tty
.main
.c_iflag
&= ~IGNBRK
;
1003 tty
.main
.c_iflag
&= ~BRKINT
;
1005 #endif /* not DOS_NT */
1007 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida, MW Aug 1993 */
1008 if (!tty_out
->term_initted
)
1009 internal_terminal_init ();
1010 dos_ttraw (tty_out
);
1013 emacs_set_tty (fileno (tty_out
->input
), &tty
, 0);
1015 /* This code added to insure that, if flow-control is not to be used,
1016 we have an unlocked terminal at the start. */
1019 if (!tty_out
->flow_control
) ioctl (fileno (tty_out
->input
), TCXONC
, 1);
1022 if (!tty_out
->flow_control
) ioctl (fileno (tty_out
->input
), TIOCSTART
, 0);
1025 #if !defined (DOS_NT)
1027 if (!tty_out
->flow_control
) tcflow (fileno (tty_out
->input
), TCOON
);
1032 #ifdef F_GETOWN /* F_SETFL does not imply existence of F_GETOWN */
1033 if (interrupt_input
)
1035 old_fcntl_owner
[fileno (tty_out
->input
)] =
1036 fcntl (fileno (tty_out
->input
), F_GETOWN
, 0);
1037 fcntl (fileno (tty_out
->input
), F_SETOWN
, getpid ());
1038 init_sigio (fileno (tty_out
->input
));
1040 if (gpm_tty
== tty_out
)
1042 /* Arrange for mouse events to give us SIGIO signals. */
1043 fcntl (gpm_fd
, F_SETOWN
, getpid ());
1044 fcntl (gpm_fd
, F_SETFL
, fcntl (gpm_fd
, F_GETFL
, 0) | O_NONBLOCK
);
1045 init_sigio (gpm_fd
);
1047 #endif /* HAVE_GPM */
1049 #endif /* F_GETOWN */
1050 #endif /* F_SETFL */
1053 /* This symbol is defined on recent USG systems.
1054 Someone says without this call USG won't really buffer the file
1055 even with a call to setbuf. */
1056 setvbuf (tty_out
->output
, (char *) _sobuf
, _IOFBF
, sizeof _sobuf
);
1058 setbuf (tty_out
->output
, (char *) _sobuf
);
1061 if (tty_out
->terminal
->set_terminal_modes_hook
)
1062 tty_out
->terminal
->set_terminal_modes_hook (tty_out
->terminal
);
1064 if (!tty_out
->term_initted
)
1066 Lisp_Object tail
, frame
;
1067 FOR_EACH_FRAME (tail
, frame
)
1069 /* XXX This needs to be revised. */
1070 if (FRAME_TERMCAP_P (XFRAME (frame
))
1071 && FRAME_TTY (XFRAME (frame
)) == tty_out
)
1072 init_frame_faces (XFRAME (frame
));
1076 if (tty_out
->term_initted
&& no_redraw_on_reenter
)
1078 /* We used to call "direct_output_forward_char(0)" here,
1079 but it's not clear why, since it may not do anything anyway. */
1083 Lisp_Object tail
, frame
;
1085 FOR_EACH_FRAME (tail
, frame
)
1087 if ((FRAME_TERMCAP_P (XFRAME (frame
))
1088 || FRAME_MSDOS_P (XFRAME (frame
)))
1089 && FRAME_TTY (XFRAME (frame
)) == tty_out
)
1090 FRAME_GARBAGED_P (XFRAME (frame
)) = 1;
1094 tty_out
->term_initted
= 1;
1097 /* Return nonzero if safe to use tabs in output.
1098 At the time this is called, init_sys_modes has not been done yet. */
1101 tabs_safe_p (int fd
)
1103 struct emacs_tty etty
;
1105 emacs_get_tty (fd
, &etty
);
1108 return ((etty
.main
.c_oflag
& TABDLY
) != TAB3
);
1109 #else /* not TABDLY */
1111 #endif /* not TABDLY */
1117 /* Get terminal size from system.
1118 Store number of lines into *HEIGHTP and width into *WIDTHP.
1119 We store 0 if there's no valid information. */
1122 get_tty_size (int fd
, int *widthp
, int *heightp
)
1124 #if defined TIOCGWINSZ
1127 struct winsize size
;
1129 if (ioctl (fd
, TIOCGWINSZ
, &size
) == -1)
1130 *widthp
= *heightp
= 0;
1133 *widthp
= size
.ws_col
;
1134 *heightp
= size
.ws_row
;
1137 #elif defined TIOCGSIZE
1139 /* SunOS - style. */
1140 struct ttysize size
;
1142 if (ioctl (fd
, TIOCGSIZE
, &size
) == -1)
1143 *widthp
= *heightp
= 0;
1146 *widthp
= size
.ts_cols
;
1147 *heightp
= size
.ts_lines
;
1150 #elif defined WINDOWSNT
1152 CONSOLE_SCREEN_BUFFER_INFO info
;
1153 if (GetConsoleScreenBufferInfo (GetStdHandle (STD_OUTPUT_HANDLE
), &info
))
1155 *widthp
= info
.srWindow
.Right
- info
.srWindow
.Left
+ 1;
1156 *heightp
= info
.srWindow
.Bottom
- info
.srWindow
.Top
+ 1;
1159 *widthp
= *heightp
= 0;
1163 *widthp
= ScreenCols ();
1164 *heightp
= ScreenRows ();
1166 #else /* system doesn't know size */
1174 /* Set the logical window size associated with descriptor FD
1175 to HEIGHT and WIDTH. This is used mainly with ptys. */
1178 set_window_size (int fd
, int height
, int width
)
1183 struct winsize size
;
1184 size
.ws_row
= height
;
1185 size
.ws_col
= width
;
1187 if (ioctl (fd
, TIOCSWINSZ
, &size
) == -1)
1188 return 0; /* error */
1195 /* SunOS - style. */
1196 struct ttysize size
;
1197 size
.ts_lines
= height
;
1198 size
.ts_cols
= width
;
1200 if (ioctl (fd
, TIOCGSIZE
, &size
) == -1)
1206 #endif /* not SunOS-style */
1207 #endif /* not BSD-style */
1212 /* Prepare all terminal devices for exiting Emacs. */
1215 reset_all_sys_modes (void)
1217 struct tty_display_info
*tty
;
1218 for (tty
= tty_list
; tty
; tty
= tty
->next
)
1219 reset_sys_modes (tty
);
1222 /* Prepare the terminal for closing it; move the cursor to the
1223 bottom of the frame, turn off interrupt-driven I/O, etc. */
1226 reset_sys_modes (struct tty_display_info
*tty_out
)
1233 if (!tty_out
->term_initted
)
1236 if (!tty_out
->output
)
1237 return; /* The tty is suspended. */
1239 /* Go to and clear the last line of the terminal. */
1241 cmgoto (tty_out
, FrameRows (tty_out
) - 1, 0);
1243 /* Code adapted from tty_clear_end_of_line. */
1244 if (tty_out
->TS_clr_line
)
1246 emacs_tputs (tty_out
, tty_out
->TS_clr_line
, 1, cmputc
);
1249 { /* have to do it the hard way */
1251 tty_turn_off_insert (tty_out
);
1253 for (i
= curX (tty_out
); i
< FrameCols (tty_out
) - 1; i
++)
1255 fputc (' ', tty_out
->output
);
1259 cmgoto (tty_out
, FrameRows (tty_out
) - 1, 0);
1260 fflush (tty_out
->output
);
1262 if (tty_out
->terminal
->reset_terminal_modes_hook
)
1263 tty_out
->terminal
->reset_terminal_modes_hook (tty_out
->terminal
);
1266 /* Avoid possible loss of output when changing terminal modes. */
1267 fsync (fileno (tty_out
->output
));
1271 #ifdef F_SETOWN /* F_SETFL does not imply existence of F_SETOWN */
1272 if (interrupt_input
)
1274 reset_sigio (fileno (tty_out
->input
));
1275 fcntl (fileno (tty_out
->input
), F_SETOWN
,
1276 old_fcntl_owner
[fileno (tty_out
->input
)]);
1278 #endif /* F_SETOWN */
1280 fcntl (fileno (tty_out
->input
), F_SETFL
,
1281 fcntl (fileno (tty_out
->input
), F_GETFL
, 0) & ~O_NDELAY
);
1283 #endif /* F_SETFL */
1285 if (tty_out
->old_tty
)
1286 while (emacs_set_tty (fileno (tty_out
->input
),
1287 tty_out
->old_tty
, 0) < 0 && errno
== EINTR
)
1290 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */
1298 /* Set up the proper status flags for use of a pty. */
1303 /* I'm told that TOICREMOTE does not mean control chars
1304 "can't be sent" but rather that they don't have
1305 input-editing or signaling effects.
1306 That should be good, because we have other ways
1307 to do those things in Emacs.
1308 However, telnet mode seems not to work on 4.2.
1309 So TIOCREMOTE is turned off now. */
1311 /* Under hp-ux, if TIOCREMOTE is turned on, some calls
1312 will hang. In particular, the "timeout" feature (which
1313 causes a read to return if there is no data available)
1314 does this. Also it is known that telnet mode will hang
1315 in such a way that Emacs must be stopped (perhaps this
1316 is the same problem).
1318 If TIOCREMOTE is turned off, then there is a bug in
1319 hp-ux which sometimes loses data. Apparently the
1320 code which blocks the master process when the internal
1321 buffer fills up does not work. Other than this,
1322 though, everything else seems to work fine.
1324 Since the latter lossage is more benign, we may as well
1325 lose that way. -- cph */
1327 #if defined (UNIX98_PTYS)
1330 ioctl (fd
, FIONBIO
, &on
);
1335 #endif /* HAVE_PTYS */
1338 #include <sys/socket.h>
1340 #endif /* HAVE_SOCKETS */
1343 #ifndef HAVE_H_ERRNO
1346 #endif /* TRY_AGAIN */
1349 init_system_name (void)
1351 #ifndef HAVE_GETHOSTNAME
1354 Vsystem_name
= build_string (uts
.nodename
);
1355 #else /* HAVE_GETHOSTNAME */
1356 unsigned int hostname_size
= 256;
1357 char *hostname
= (char *) alloca (hostname_size
);
1359 /* Try to get the host name; if the buffer is too short, try
1360 again. Apparently, the only indication gethostname gives of
1361 whether the buffer was large enough is the presence or absence
1362 of a '\0' in the string. Eech. */
1365 gethostname (hostname
, hostname_size
- 1);
1366 hostname
[hostname_size
- 1] = '\0';
1368 /* Was the buffer large enough for the '\0'? */
1369 if (strlen (hostname
) < hostname_size
- 1)
1372 hostname_size
<<= 1;
1373 hostname
= (char *) alloca (hostname_size
);
1376 /* Turn the hostname into the official, fully-qualified hostname.
1377 Don't do this if we're going to dump; this can confuse system
1378 libraries on some machines and make the dumped emacs core dump. */
1381 #endif /* not CANNOT_DUMP */
1382 if (! strchr (hostname
, '.'))
1385 #ifdef HAVE_GETADDRINFO
1386 struct addrinfo
*res
;
1387 struct addrinfo hints
;
1390 memset (&hints
, 0, sizeof (hints
));
1391 hints
.ai_socktype
= SOCK_STREAM
;
1392 hints
.ai_flags
= AI_CANONNAME
;
1394 for (count
= 0;; count
++)
1396 if ((ret
= getaddrinfo (hostname
, NULL
, &hints
, &res
)) == 0
1397 || ret
!= EAI_AGAIN
)
1402 Fsleep_for (make_number (1), Qnil
);
1407 struct addrinfo
*it
= res
;
1410 char *fqdn
= it
->ai_canonname
;
1411 if (fqdn
&& strchr (fqdn
, '.')
1412 && strcmp (fqdn
, "localhost.localdomain") != 0)
1418 hostname
= alloca (strlen (it
->ai_canonname
) + 1);
1419 strcpy (hostname
, it
->ai_canonname
);
1423 #else /* !HAVE_GETADDRINFO */
1425 for (count
= 0;; count
++)
1431 hp
= gethostbyname (hostname
);
1433 if (! (hp
== 0 && h_errno
== TRY_AGAIN
))
1440 Fsleep_for (make_number (1), Qnil
);
1445 char *fqdn
= (char *) hp
->h_name
;
1447 if (!strchr (fqdn
, '.'))
1449 /* We still don't have a fully qualified domain name.
1450 Try to find one in the list of alternate names */
1451 char **alias
= hp
->h_aliases
;
1453 && (!strchr (*alias
, '.')
1454 || !strcmp (*alias
, "localhost.localdomain")))
1461 #endif /* !HAVE_GETADDRINFO */
1463 #endif /* HAVE_SOCKETS */
1464 Vsystem_name
= build_string (hostname
);
1465 #endif /* HAVE_GETHOSTNAME */
1468 for (p
= SDATA (Vsystem_name
); *p
; p
++)
1469 if (*p
== ' ' || *p
== '\t')
1474 /* POSIX signals support - DJB */
1475 /* Anyone with POSIX signals should have ANSI C declarations */
1477 sigset_t empty_mask
;
1482 sys_signal (int signal_number
, signal_handler_t action
)
1484 struct sigaction new_action
, old_action
;
1485 sigemptyset (&new_action
.sa_mask
);
1486 new_action
.sa_handler
= action
;
1487 new_action
.sa_flags
= 0;
1488 #if defined (SA_RESTART)
1489 /* Emacs mostly works better with restartable system services. If this
1490 flag exists, we probably want to turn it on here.
1491 However, on some systems this resets the timeout of `select'
1492 which means that `select' never finishes if it keeps getting signals.
1493 BROKEN_SA_RESTART is defined on those systems. */
1494 /* It's not clear why the comment above says "mostly works better". --Stef
1495 When SYNC_INPUT is set, 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 the interrupt_input_pending flag. */
1498 /* Non-interactive keyboard input goes through stdio, where we always
1499 want restartable system calls. */
1500 # if defined (BROKEN_SA_RESTART) || defined (SYNC_INPUT)
1503 new_action
.sa_flags
= SA_RESTART
;
1505 sigaction (signal_number
, &new_action
, &old_action
);
1506 return (old_action
.sa_handler
);
1509 #endif /* WINDOWSNT */
1512 /* If we're compiling with GCC, we don't need this function, since it
1513 can be written as a macro. */
1515 sys_sigmask (int sig
)
1518 sigemptyset (&mask
);
1519 sigaddset (&mask
, sig
);
1524 /* I'd like to have these guys return pointers to the mask storage in here,
1525 but there'd be trouble if the code was saving multiple masks. I'll be
1526 safe and pass the structure. It normally won't be more than 2 bytes
1530 sys_sigblock (sigset_t new_mask
)
1533 pthread_sigmask (SIG_BLOCK
, &new_mask
, &old_mask
);
1538 sys_sigunblock (sigset_t new_mask
)
1541 pthread_sigmask (SIG_UNBLOCK
, &new_mask
, &old_mask
);
1546 sys_sigsetmask (sigset_t new_mask
)
1549 pthread_sigmask (SIG_SETMASK
, &new_mask
, &old_mask
);
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 #if !defined HAVE_STRSIGNAL && !HAVE_DECL_SYS_SIGLIST
1571 sys_siglist
[SIGABRT
] = "Aborted";
1574 sys_siglist
[SIGAIO
] = "LAN I/O interrupt";
1577 sys_siglist
[SIGALRM
] = "Alarm clock";
1580 sys_siglist
[SIGBUS
] = "Bus error";
1583 sys_siglist
[SIGCLD
] = "Child status changed";
1586 sys_siglist
[SIGCHLD
] = "Child status changed";
1589 sys_siglist
[SIGCONT
] = "Continued";
1592 sys_siglist
[SIGDANGER
] = "Swap space dangerously low";
1595 sys_siglist
[SIGDGNOTIFY
] = "Notification message in queue";
1598 sys_siglist
[SIGEMT
] = "Emulation trap";
1601 sys_siglist
[SIGFPE
] = "Arithmetic exception";
1604 sys_siglist
[SIGFREEZE
] = "SIGFREEZE";
1607 sys_siglist
[SIGGRANT
] = "Monitor mode granted";
1610 sys_siglist
[SIGHUP
] = "Hangup";
1613 sys_siglist
[SIGILL
] = "Illegal instruction";
1616 sys_siglist
[SIGINT
] = "Interrupt";
1619 sys_siglist
[SIGIO
] = "I/O possible";
1622 sys_siglist
[SIGIOINT
] = "I/O intervention required";
1625 sys_siglist
[SIGIOT
] = "IOT trap";
1628 sys_siglist
[SIGKILL
] = "Killed";
1631 sys_siglist
[SIGLOST
] = "Resource lost";
1634 sys_siglist
[SIGLWP
] = "SIGLWP";
1637 sys_siglist
[SIGMSG
] = "Monitor mode data available";
1640 sys_siglist
[SIGWIND
] = "SIGPHONE";
1643 sys_siglist
[SIGPIPE
] = "Broken pipe";
1646 sys_siglist
[SIGPOLL
] = "Pollable event occurred";
1649 sys_siglist
[SIGPROF
] = "Profiling timer expired";
1652 sys_siglist
[SIGPTY
] = "PTY I/O interrupt";
1655 sys_siglist
[SIGPWR
] = "Power-fail restart";
1658 sys_siglist
[SIGQUIT
] = "Quit";
1661 sys_siglist
[SIGRETRACT
] = "Need to relinquish monitor mode";
1664 sys_siglist
[SIGSAK
] = "Secure attention";
1667 sys_siglist
[SIGSEGV
] = "Segmentation violation";
1670 sys_siglist
[SIGSOUND
] = "Sound completed";
1673 sys_siglist
[SIGSTOP
] = "Stopped (signal)";
1676 sys_siglist
[SIGSTP
] = "Stopped (user)";
1679 sys_siglist
[SIGSYS
] = "Bad argument to system call";
1682 sys_siglist
[SIGTERM
] = "Terminated";
1685 sys_siglist
[SIGTHAW
] = "SIGTHAW";
1688 sys_siglist
[SIGTRAP
] = "Trace/breakpoint trap";
1691 sys_siglist
[SIGTSTP
] = "Stopped (user)";
1694 sys_siglist
[SIGTTIN
] = "Stopped (tty input)";
1697 sys_siglist
[SIGTTOU
] = "Stopped (tty output)";
1700 sys_siglist
[SIGURG
] = "Urgent I/O condition";
1703 sys_siglist
[SIGUSR1
] = "User defined signal 1";
1706 sys_siglist
[SIGUSR2
] = "User defined signal 2";
1709 sys_siglist
[SIGVTALRM
] = "Virtual timer expired";
1712 sys_siglist
[SIGWAITING
] = "Process's LWPs are blocked";
1715 sys_siglist
[SIGWINCH
] = "Window size changed";
1718 sys_siglist
[SIGWIND
] = "SIGWIND";
1721 sys_siglist
[SIGXCPU
] = "CPU time limit exceeded";
1724 sys_siglist
[SIGXFSZ
] = "File size limit exceeded";
1727 #endif /* !defined HAVE_STRSIGNAL && !defined HAVE_DECL_SYS_SIGLIST */
1736 /* Figure out how many bits the system's random number generator uses.
1737 `random' and `lrand48' are assumed to return 31 usable bits.
1738 BSD `rand' returns a 31 bit value but the low order bits are unusable;
1739 so we'll shift it and treat it like the 15-bit USG `rand'. */
1743 # define RAND_BITS 31
1744 # else /* !HAVE_RANDOM */
1745 # ifdef HAVE_LRAND48
1746 # define RAND_BITS 31
1747 # define random lrand48
1748 # else /* !HAVE_LRAND48 */
1749 # define RAND_BITS 15
1750 # if RAND_MAX == 32767
1751 # define random rand
1752 # else /* RAND_MAX != 32767 */
1753 # if RAND_MAX == 2147483647
1754 # define random() (rand () >> 16)
1755 # else /* RAND_MAX != 2147483647 */
1757 # define random rand
1759 # define random() (rand () >> 16)
1761 # endif /* RAND_MAX != 2147483647 */
1762 # endif /* RAND_MAX != 32767 */
1763 # endif /* !HAVE_LRAND48 */
1764 # endif /* !HAVE_RANDOM */
1765 #endif /* !RAND_BITS */
1768 seed_random (long int arg
)
1771 srandom ((unsigned int)arg
);
1773 # ifdef HAVE_LRAND48
1776 srand ((unsigned int)arg
);
1782 * Return a nonnegative random integer out of whatever we've got.
1783 * It contains enough bits to make a random (signed) Emacs fixnum.
1784 * This suffices even for a 64-bit architecture with a 15-bit rand.
1791 for (i
= 0; i
< (FIXNUM_BITS
+ RAND_BITS
- 1) / RAND_BITS
; i
++)
1792 val
= (random () ^ (val
<< RAND_BITS
)
1793 ^ (val
>> (BITS_PER_EMACS_INT
- RAND_BITS
)));
1794 val
^= val
>> (BITS_PER_EMACS_INT
- FIXNUM_BITS
);
1795 return val
& INTMASK
;
1798 #ifndef HAVE_STRERROR
1801 strerror (int errnum
)
1803 extern char *sys_errlist
[];
1804 extern int sys_nerr
;
1806 if (errnum
>= 0 && errnum
< sys_nerr
)
1807 return sys_errlist
[errnum
];
1808 return (char *) "Unknown error";
1810 #endif /* not WINDOWSNT */
1811 #endif /* ! HAVE_STRERROR */
1813 #ifndef HAVE_SNPRINTF
1814 /* Approximate snprintf as best we can on ancient hosts that lack it. */
1816 snprintf (char *buf
, size_t bufsize
, char const *format
, ...)
1818 ptrdiff_t size
= min (bufsize
, PTRDIFF_MAX
);
1819 ptrdiff_t nbytes
= size
- 1;
1824 va_start (ap
, format
);
1825 nbytes
= doprnt (buf
, size
, format
, 0, ap
);
1829 if (nbytes
== size
- 1)
1831 /* Calculate the length of the string that would have been created
1832 had the buffer been large enough. */
1833 char stackbuf
[4000];
1835 ptrdiff_t bsize
= sizeof stackbuf
;
1836 va_start (ap
, format
);
1837 nbytes
= evxprintf (&b
, &bsize
, stackbuf
, -1, format
, ap
);
1843 if (INT_MAX
< nbytes
)
1857 emacs_open (const char *path
, int oflag
, int mode
)
1859 register int rtnval
;
1861 while ((rtnval
= open (path
, oflag
, mode
)) == -1
1862 && (errno
== EINTR
))
1868 emacs_close (int fd
)
1871 register int rtnval
;
1873 while ((rtnval
= close (fd
)) == -1
1874 && (errno
== EINTR
))
1877 /* If close is interrupted SunOS 4.1 may or may not have closed the
1878 file descriptor. If it did the second close will fail with
1879 errno = EBADF. That means we have succeeded. */
1880 if (rtnval
== -1 && did_retry
&& errno
== EBADF
)
1886 /* Maximum number of bytes to read or write in a single system call.
1887 This works around a serious bug in Linux kernels before 2.6.16; see
1888 <https://bugzilla.redhat.com/show_bug.cgi?format=multiple&id=612839>.
1889 It's likely to work around similar bugs in other operating systems, so do it
1890 on all platforms. Round INT_MAX down to a page size, with the conservative
1891 assumption that page sizes are at most 2**18 bytes (any kernel with a
1892 page size larger than that shouldn't have the bug). */
1893 #ifndef MAX_RW_COUNT
1894 #define MAX_RW_COUNT (INT_MAX >> 18 << 18)
1897 /* Read from FILEDESC to a buffer BUF with size NBYTE, retrying if interrupted.
1898 Return the number of bytes read, which might be less than NBYTE.
1899 On error, set errno and return -1. */
1901 emacs_read (int fildes
, char *buf
, ptrdiff_t nbyte
)
1903 register ssize_t rtnval
;
1905 /* There is no need to check against MAX_RW_COUNT, since no caller ever
1906 passes a size that large to emacs_read. */
1908 while ((rtnval
= read (fildes
, buf
, nbyte
)) == -1
1909 && (errno
== EINTR
))
1914 /* Write to FILEDES from a buffer BUF with size NBYTE, retrying if interrupted
1915 or if a partial write occurs. Return the number of bytes written, setting
1916 errno if this is less than NBYTE. */
1918 emacs_write (int fildes
, const char *buf
, ptrdiff_t nbyte
)
1921 ptrdiff_t bytes_written
;
1927 rtnval
= write (fildes
, buf
, min (nbyte
, MAX_RW_COUNT
));
1934 /* I originally used `QUIT' but that might causes files to
1935 be truncated if you hit C-g in the middle of it. --Stef */
1936 process_pending_signals ();
1946 bytes_written
+= rtnval
;
1949 return (bytes_written
);
1952 static struct allocator
const emacs_norealloc_allocator
=
1953 { xmalloc
, NULL
, xfree
, memory_full
};
1955 /* Get the symbolic link value of FILENAME. Return a pointer to a
1956 NUL-terminated string. If readlink fails, return NULL and set
1957 errno. If the value fits in INITIAL_BUF, return INITIAL_BUF.
1958 Otherwise, allocate memory and return a pointer to that memory. If
1959 memory allocation fails, diagnose and fail without returning. If
1960 successful, store the length of the symbolic link into *LINKLEN. */
1962 emacs_readlink (char const *filename
, char initial_buf
[READLINK_BUFSIZE
])
1964 return careadlinkat (AT_FDCWD
, filename
, initial_buf
, READLINK_BUFSIZE
,
1965 &emacs_norealloc_allocator
, careadlinkatcwd
);
1970 * All of the following are for USG.
1972 * On USG systems the system calls are INTERRUPTIBLE by signals
1973 * that the user program has elected to catch. Thus the system call
1974 * must be retried in these cases. To handle this without massive
1975 * changes in the source code, we remap the standard system call names
1976 * to names for our own functions in sysdep.c that do the system call
1977 * with retries. Actually, for portability reasons, it is good
1978 * programming practice, as this example shows, to limit all actual
1979 * system calls to a single occurrence in the source. Sure, this
1980 * adds an extra level of function call overhead but it is almost
1981 * always negligible. Fred Fish, Unisoft Systems Inc.
1985 * Warning, this function may not duplicate 4.2 action properly
1986 * under error conditions.
1992 /* In 4.1, param.h fails to define this. */
1993 #define MAXPATHLEN 1024
1997 getwd (char *pathname
)
1999 char *npath
, *spath
;
2000 extern char *getcwd (char *, size_t);
2002 BLOCK_INPUT
; /* getcwd uses malloc */
2003 spath
= npath
= getcwd ((char *) 0, MAXPATHLEN
);
2009 /* On Altos 3068, getcwd can return @hostname/dir, so discard
2010 up to first slash. Should be harmless on other systems. */
2011 while (*npath
&& *npath
!= '/')
2013 strcpy (pathname
, npath
);
2014 free (spath
); /* getcwd uses malloc */
2019 #endif /* HAVE_GETWD */
2022 * Emulate rename using unlink/link. Note that this is
2023 * only partially correct. Also, doesn't enforce restriction
2024 * that files be of same type (regular->regular, dir->dir, etc).
2030 rename (const char *from
, const char *to
)
2032 if (access (from
, 0) == 0)
2035 if (link (from
, to
) == 0)
2036 if (unlink (from
) == 0)
2045 #if defined (HPUX) && !defined (HAVE_PERROR)
2047 /* HPUX curses library references perror, but as far as we know
2048 it won't be called. Anyway this definition will do for now. */
2054 #endif /* HPUX and not HAVE_PERROR */
2057 * This function will go away as soon as all the stubs fixed. (fnf)
2061 croak (char *badfunc
)
2063 printf ("%s not yet implemented\r\n", badfunc
);
2064 reset_all_sys_modes ();
2070 /* Directory routines for systems that don't have them. */
2072 #ifdef HAVE_DIRENT_H
2076 #if !defined (HAVE_CLOSEDIR)
2079 closedir (DIR *dirp
/* stream from opendir */)
2083 rtnval
= emacs_close (dirp
->dd_fd
);
2084 xfree ((char *) dirp
);
2088 #endif /* not HAVE_CLOSEDIR */
2089 #endif /* HAVE_DIRENT_H */
2092 /* Return a struct timeval that is roughly equivalent to T.
2093 Use the least timeval not less than T.
2094 Return an extremal value if the result would overflow. */
2096 make_timeval (EMACS_TIME t
)
2099 tv
.tv_sec
= t
.tv_sec
;
2100 tv
.tv_usec
= t
.tv_nsec
/ 1000;
2102 if (t
.tv_nsec
% 1000 != 0)
2104 if (tv
.tv_usec
< 999999)
2106 else if (tv
.tv_sec
< TYPE_MAXIMUM (time_t))
2116 /* Set the access and modification time stamps of FD (a.k.a. FILE) to be
2117 ATIME and MTIME, respectively.
2118 FD must be either negative -- in which case it is ignored --
2119 or a file descriptor that is open on FILE.
2120 If FD is nonnegative, then FILE can be NULL. */
2122 set_file_times (int fd
, const char *filename
,
2123 EMACS_TIME atime
, EMACS_TIME mtime
)
2125 struct timespec timespec
[2];
2126 timespec
[0] = atime
;
2127 timespec
[1] = mtime
;
2128 return fdutimens (fd
, filename
, timespec
);
2131 /* mkdir and rmdir functions, for systems which don't have them. */
2135 * Written by Robert Rother, Mariah Corporation, August 1985.
2137 * If you want it, it's yours. All I ask in return is that if you
2138 * figure out how to do this in a Bourne Shell script you send me
2140 * sdcsvax!rmr or rmr@uscd
2142 * Severely hacked over by John Gilmore to make a 4.2BSD compatible
2143 * subroutine. 11Mar86; hoptoad!gnu
2145 * Modified by rmtodd@uokmax 6-28-87 -- when making an already existing dir,
2146 * subroutine didn't return EEXIST. It does now.
2153 mkdir (char *dpath
, int dmode
)
2157 struct stat statbuf
;
2159 if (stat (dpath
, &statbuf
) == 0)
2161 errno
= EEXIST
; /* Stat worked, so it already exists */
2165 /* If stat fails for a reason other than non-existence, return error */
2166 if (errno
!= ENOENT
)
2169 synch_process_alive
= 1;
2170 switch (cpid
= fork ())
2173 case -1: /* Error in fork */
2174 return (-1); /* Errno is set already */
2176 case 0: /* Child process */
2178 * Cheap hack to set mode of new directory. Since this
2179 * child process is going away anyway, we zap its umask.
2180 * FIXME, this won't suffice to set SUID, SGID, etc. on this
2181 * directory. Does anybody care?
2183 status
= umask (0); /* Get current umask */
2184 status
= umask (status
| (0777 & ~dmode
)); /* Set for mkdir */
2185 fd
= emacs_open ("/dev/null", O_RDWR
, 0);
2192 execl ("/bin/mkdir", "mkdir", dpath
, (char *) 0);
2193 _exit (-1); /* Can't exec /bin/mkdir */
2195 default: /* Parent process */
2196 wait_for_termination (cpid
);
2199 if (synch_process_death
!= 0 || synch_process_retcode
!= 0
2200 || synch_process_termsig
!= 0)
2202 errno
= EIO
; /* We don't know why, but */
2203 return -1; /* /bin/mkdir failed */
2208 #endif /* not HAVE_MKDIR */
2214 int cpid
, status
, fd
;
2215 struct stat statbuf
;
2217 if (stat (dpath
, &statbuf
) != 0)
2219 /* Stat just set errno. We don't have to */
2223 synch_process_alive
= 1;
2224 switch (cpid
= fork ())
2227 case -1: /* Error in fork */
2228 return (-1); /* Errno is set already */
2230 case 0: /* Child process */
2231 fd
= emacs_open ("/dev/null", O_RDWR
, 0);
2238 execl ("/bin/rmdir", "rmdir", dpath
, (char *) 0);
2239 _exit (-1); /* Can't exec /bin/rmdir */
2241 default: /* Parent process */
2242 wait_for_termination (cpid
);
2245 if (synch_process_death
!= 0 || synch_process_retcode
!= 0
2246 || synch_process_termsig
!= 0)
2248 errno
= EIO
; /* We don't know why, but */
2249 return -1; /* /bin/rmdir failed */
2254 #endif /* !HAVE_RMDIR */
2257 #ifndef HAVE_STRSIGNAL
2259 strsignal (int code
)
2263 if (0 <= code
&& code
< NSIG
)
2265 /* Cast to suppress warning if the table has const char *. */
2266 signame
= (char *) sys_siglist
[code
];
2271 #endif /* HAVE_STRSIGNAL */
2274 /* For make-serial-process */
2276 serial_open (char *port
)
2280 fd
= emacs_open ((char*) port
,
2293 error ("Could not open %s: %s",
2294 port
, emacs_strerror (errno
));
2297 ioctl (fd
, TIOCEXCL
, (char *) 0);
2303 #if !defined (HAVE_CFMAKERAW)
2304 /* Workaround for targets which are missing cfmakeraw. */
2305 /* Pasted from man page. */
2307 cfmakeraw (struct termios
*termios_p
)
2309 termios_p
->c_iflag
&= ~(IGNBRK
|BRKINT
|PARMRK
|ISTRIP
|INLCR
|IGNCR
|ICRNL
|IXON
);
2310 termios_p
->c_oflag
&= ~OPOST
;
2311 termios_p
->c_lflag
&= ~(ECHO
|ECHONL
|ICANON
|ISIG
|IEXTEN
);
2312 termios_p
->c_cflag
&= ~(CSIZE
|PARENB
);
2313 termios_p
->c_cflag
|= CS8
;
2315 #endif /* !defined (HAVE_CFMAKERAW */
2317 #if !defined (HAVE_CFSETSPEED)
2318 /* Workaround for targets which are missing cfsetspeed. */
2320 cfsetspeed (struct termios
*termios_p
, speed_t vitesse
)
2322 return (cfsetispeed (termios_p
, vitesse
)
2323 + cfsetospeed (termios_p
, vitesse
));
2327 /* For serial-process-configure */
2329 serial_configure (struct Lisp_Process
*p
,
2330 Lisp_Object contact
)
2332 Lisp_Object childp2
= Qnil
;
2333 Lisp_Object tem
= Qnil
;
2334 struct termios attr
;
2336 char summary
[4] = "???"; /* This usually becomes "8N1". */
2338 childp2
= Fcopy_sequence (p
->childp
);
2340 /* Read port attributes and prepare default configuration. */
2341 err
= tcgetattr (p
->outfd
, &attr
);
2343 error ("tcgetattr() failed: %s", emacs_strerror (errno
));
2345 #if defined (CLOCAL)
2346 attr
.c_cflag
|= CLOCAL
;
2349 attr
.c_cflag
|= CREAD
;
2352 /* Configure speed. */
2353 if (!NILP (Fplist_member (contact
, QCspeed
)))
2354 tem
= Fplist_get (contact
, QCspeed
);
2356 tem
= Fplist_get (p
->childp
, QCspeed
);
2358 err
= cfsetspeed (&attr
, XINT (tem
));
2360 error ("cfsetspeed(%"pI
"d) failed: %s", XINT (tem
),
2361 emacs_strerror (errno
));
2362 childp2
= Fplist_put (childp2
, QCspeed
, tem
);
2364 /* Configure bytesize. */
2365 if (!NILP (Fplist_member (contact
, QCbytesize
)))
2366 tem
= Fplist_get (contact
, QCbytesize
);
2368 tem
= Fplist_get (p
->childp
, QCbytesize
);
2370 tem
= make_number (8);
2372 if (XINT (tem
) != 7 && XINT (tem
) != 8)
2373 error (":bytesize must be nil (8), 7, or 8");
2374 summary
[0] = XINT (tem
) + '0';
2375 #if defined (CSIZE) && defined (CS7) && defined (CS8)
2376 attr
.c_cflag
&= ~CSIZE
;
2377 attr
.c_cflag
|= ((XINT (tem
) == 7) ? CS7
: CS8
);
2379 /* Don't error on bytesize 8, which should be set by cfmakeraw. */
2380 if (XINT (tem
) != 8)
2381 error ("Bytesize cannot be changed");
2383 childp2
= Fplist_put (childp2
, QCbytesize
, tem
);
2385 /* Configure parity. */
2386 if (!NILP (Fplist_member (contact
, QCparity
)))
2387 tem
= Fplist_get (contact
, QCparity
);
2389 tem
= Fplist_get (p
->childp
, QCparity
);
2390 if (!NILP (tem
) && !EQ (tem
, Qeven
) && !EQ (tem
, Qodd
))
2391 error (":parity must be nil (no parity), `even', or `odd'");
2392 #if defined (PARENB) && defined (PARODD) && defined (IGNPAR) && defined (INPCK)
2393 attr
.c_cflag
&= ~(PARENB
| PARODD
);
2394 attr
.c_iflag
&= ~(IGNPAR
| INPCK
);
2399 else if (EQ (tem
, Qeven
))
2402 attr
.c_cflag
|= PARENB
;
2403 attr
.c_iflag
|= (IGNPAR
| INPCK
);
2405 else if (EQ (tem
, Qodd
))
2408 attr
.c_cflag
|= (PARENB
| PARODD
);
2409 attr
.c_iflag
|= (IGNPAR
| INPCK
);
2412 /* Don't error on no parity, which should be set by cfmakeraw. */
2414 error ("Parity cannot be configured");
2416 childp2
= Fplist_put (childp2
, QCparity
, tem
);
2418 /* Configure stopbits. */
2419 if (!NILP (Fplist_member (contact
, QCstopbits
)))
2420 tem
= Fplist_get (contact
, QCstopbits
);
2422 tem
= Fplist_get (p
->childp
, QCstopbits
);
2424 tem
= make_number (1);
2426 if (XINT (tem
) != 1 && XINT (tem
) != 2)
2427 error (":stopbits must be nil (1 stopbit), 1, or 2");
2428 summary
[2] = XINT (tem
) + '0';
2429 #if defined (CSTOPB)
2430 attr
.c_cflag
&= ~CSTOPB
;
2431 if (XINT (tem
) == 2)
2432 attr
.c_cflag
|= CSTOPB
;
2434 /* Don't error on 1 stopbit, which should be set by cfmakeraw. */
2435 if (XINT (tem
) != 1)
2436 error ("Stopbits cannot be configured");
2438 childp2
= Fplist_put (childp2
, QCstopbits
, tem
);
2440 /* Configure flowcontrol. */
2441 if (!NILP (Fplist_member (contact
, QCflowcontrol
)))
2442 tem
= Fplist_get (contact
, QCflowcontrol
);
2444 tem
= Fplist_get (p
->childp
, QCflowcontrol
);
2445 if (!NILP (tem
) && !EQ (tem
, Qhw
) && !EQ (tem
, Qsw
))
2446 error (":flowcontrol must be nil (no flowcontrol), `hw', or `sw'");
2447 #if defined (CRTSCTS)
2448 attr
.c_cflag
&= ~CRTSCTS
;
2450 #if defined (CNEW_RTSCTS)
2451 attr
.c_cflag
&= ~CNEW_RTSCTS
;
2453 #if defined (IXON) && defined (IXOFF)
2454 attr
.c_iflag
&= ~(IXON
| IXOFF
);
2458 /* Already configured. */
2460 else if (EQ (tem
, Qhw
))
2462 #if defined (CRTSCTS)
2463 attr
.c_cflag
|= CRTSCTS
;
2464 #elif defined (CNEW_RTSCTS)
2465 attr
.c_cflag
|= CNEW_RTSCTS
;
2467 error ("Hardware flowcontrol (RTS/CTS) not supported");
2470 else if (EQ (tem
, Qsw
))
2472 #if defined (IXON) && defined (IXOFF)
2473 attr
.c_iflag
|= (IXON
| IXOFF
);
2475 error ("Software flowcontrol (XON/XOFF) not supported");
2478 childp2
= Fplist_put (childp2
, QCflowcontrol
, tem
);
2480 /* Activate configuration. */
2481 err
= tcsetattr (p
->outfd
, TCSANOW
, &attr
);
2483 error ("tcsetattr() failed: %s", emacs_strerror (errno
));
2485 childp2
= Fplist_put (childp2
, QCsummary
, build_string (summary
));
2486 p
->childp
= childp2
;
2489 #endif /* not DOS_NT */
2491 /* System depended enumeration of and access to system processes a-la ps(1). */
2495 /* Process enumeration and access via /proc. */
2498 list_system_processes (void)
2500 Lisp_Object procdir
, match
, proclist
, next
;
2501 struct gcpro gcpro1
, gcpro2
;
2502 register Lisp_Object tail
;
2504 GCPRO2 (procdir
, match
);
2505 /* For every process on the system, there's a directory in the
2506 "/proc" pseudo-directory whose name is the numeric ID of that
2508 procdir
= build_string ("/proc");
2509 match
= build_string ("[0-9]+");
2510 proclist
= directory_files_internal (procdir
, Qnil
, match
, Qt
, 0, Qnil
);
2512 /* `proclist' gives process IDs as strings. Destructively convert
2513 each string into a number. */
2514 for (tail
= proclist
; CONSP (tail
); tail
= next
)
2517 XSETCAR (tail
, Fstring_to_number (XCAR (tail
), Qnil
));
2521 /* directory_files_internal returns the files in reverse order; undo
2523 proclist
= Fnreverse (proclist
);
2527 #elif defined BSD_SYSTEM
2530 list_system_processes (void)
2533 int mib
[] = {CTL_KERN
, KERN_PROC
, KERN_PROC_ALL
};
2535 int mib
[] = {CTL_KERN
, KERN_PROC
, KERN_PROC_PROC
};
2538 struct kinfo_proc
*procs
;
2541 struct gcpro gcpro1
;
2542 Lisp_Object proclist
= Qnil
;
2544 if (sysctl (mib
, 3, NULL
, &len
, NULL
, 0) != 0)
2547 procs
= xmalloc (len
);
2548 if (sysctl (mib
, 3, procs
, &len
, NULL
, 0) != 0)
2555 len
/= sizeof (struct kinfo_proc
);
2556 for (i
= 0; i
< len
; i
++)
2559 proclist
= Fcons (make_fixnum_or_float (procs
[i
].kp_proc
.p_pid
), proclist
);
2561 proclist
= Fcons (make_fixnum_or_float (procs
[i
].ki_pid
), proclist
);
2571 /* The WINDOWSNT implementation is in w32.c.
2572 The MSDOS implementation is in dosfns.c. */
2573 #elif !defined (WINDOWSNT) && !defined (MSDOS)
2576 list_system_processes (void)
2581 #endif /* !defined (WINDOWSNT) */
2585 time_from_jiffies (unsigned long long tval
, long hz
)
2587 unsigned long long s
= tval
/ hz
;
2588 unsigned long long frac
= tval
% hz
;
2592 if (TYPE_MAXIMUM (time_t) < s
)
2594 if (LONG_MAX
- 1 <= ULLONG_MAX
/ EMACS_TIME_RESOLUTION
2595 || frac
<= ULLONG_MAX
/ EMACS_TIME_RESOLUTION
)
2596 ns
= frac
* EMACS_TIME_RESOLUTION
/ hz
;
2599 /* This is reachable only in the unlikely case that HZ * HZ
2600 exceeds ULLONG_MAX. It calculates an approximation that is
2601 guaranteed to be in range. */
2602 long hz_per_ns
= (hz
/ EMACS_TIME_RESOLUTION
2603 + (hz
% EMACS_TIME_RESOLUTION
!= 0));
2604 ns
= frac
/ hz_per_ns
;
2607 EMACS_SET_SECS_NSECS (t
, s
, ns
);
2612 ltime_from_jiffies (unsigned long long tval
, long hz
)
2614 EMACS_TIME t
= time_from_jiffies (tval
, hz
);
2615 return make_lisp_time (t
);
2624 EMACS_SET_SECS_NSECS (up
, 0, 0);
2627 fup
= fopen ("/proc/uptime", "r");
2631 unsigned long long upsec
, upfrac
, idlesec
, idlefrac
;
2632 int upfrac_start
, upfrac_end
, idlefrac_start
, idlefrac_end
;
2634 if (fscanf (fup
, "%llu.%n%llu%n %llu.%n%llu%n",
2635 &upsec
, &upfrac_start
, &upfrac
, &upfrac_end
,
2636 &idlesec
, &idlefrac_start
, &idlefrac
, &idlefrac_end
)
2639 if (TYPE_MAXIMUM (time_t) < upsec
)
2641 upsec
= TYPE_MAXIMUM (time_t);
2642 upfrac
= EMACS_TIME_RESOLUTION
- 1;
2646 int upfraclen
= upfrac_end
- upfrac_start
;
2647 for (; upfraclen
< LOG10_EMACS_TIME_RESOLUTION
; upfraclen
++)
2649 for (; LOG10_EMACS_TIME_RESOLUTION
< upfraclen
; upfraclen
--)
2651 upfrac
= min (upfrac
, EMACS_TIME_RESOLUTION
- 1);
2653 EMACS_SET_SECS_NSECS (up
, upsec
, upfrac
);
2662 #define MAJOR(d) (((unsigned)(d) >> 8) & 0xfff)
2663 #define MINOR(d) (((unsigned)(d) & 0xff) | (((unsigned)(d) & 0xfff00000) >> 12))
2666 procfs_ttyname (int rdev
)
2669 char name
[PATH_MAX
];
2672 fdev
= fopen ("/proc/tty/drivers", "r");
2677 unsigned long minor_beg
, minor_end
;
2678 char minor
[25]; /* 2 32-bit numbers + dash */
2681 while (!feof (fdev
) && !ferror (fdev
))
2683 if (3 <= fscanf (fdev
, "%*s %s %u %s %*s\n", name
, &major
, minor
)
2684 && major
== MAJOR (rdev
))
2686 minor_beg
= strtoul (minor
, &endp
, 0);
2688 minor_end
= minor_beg
;
2689 else if (*endp
== '-')
2690 minor_end
= strtoul (endp
+ 1, &endp
, 0);
2694 if (MINOR (rdev
) >= minor_beg
&& MINOR (rdev
) <= minor_end
)
2696 sprintf (name
+ strlen (name
), "%u", MINOR (rdev
));
2704 return build_string (name
);
2707 static unsigned long
2708 procfs_get_total_memory (void)
2711 unsigned long retval
= 2 * 1024 * 1024; /* default: 2GB */
2714 fmem
= fopen ("/proc/meminfo", "r");
2718 unsigned long entry_value
;
2719 char entry_name
[20]; /* the longest I saw is 13+1 */
2721 while (!feof (fmem
) && !ferror (fmem
))
2723 if (2 <= fscanf (fmem
, "%s %lu kB\n", entry_name
, &entry_value
)
2724 && strcmp (entry_name
, "MemTotal:") == 0)
2726 retval
= entry_value
;
2737 system_process_attributes (Lisp_Object pid
)
2739 char procfn
[PATH_MAX
], fn
[PATH_MAX
];
2743 long clocks_per_sec
;
2745 char procbuf
[1025], *p
, *q
;
2748 const char *cmd
= NULL
;
2749 char *cmdline
= NULL
;
2750 ptrdiff_t cmdsize
= 0, cmdline_size
;
2753 int ppid
, pgrp
, sess
, tty
, tpgid
, thcount
;
2756 unsigned long long u_time
, s_time
, cutime
, cstime
, start
;
2757 long priority
, niceness
, rss
;
2758 unsigned long minflt
, majflt
, cminflt
, cmajflt
, vsize
;
2759 EMACS_TIME tnow
, tstart
, tboot
, telapsed
, us_time
;
2761 Lisp_Object attrs
= Qnil
;
2762 Lisp_Object cmd_str
, decoded_cmd
, tem
;
2763 struct gcpro gcpro1
, gcpro2
;
2765 CHECK_NUMBER_OR_FLOAT (pid
);
2766 CONS_TO_INTEGER (pid
, pid_t
, proc_id
);
2767 sprintf (procfn
, "/proc/%"pMd
, proc_id
);
2768 if (stat (procfn
, &st
) < 0)
2771 GCPRO2 (attrs
, decoded_cmd
);
2775 attrs
= Fcons (Fcons (Qeuid
, make_fixnum_or_float (uid
)), attrs
);
2777 pw
= getpwuid (uid
);
2780 attrs
= Fcons (Fcons (Quser
, build_string (pw
->pw_name
)), attrs
);
2783 attrs
= Fcons (Fcons (Qegid
, make_fixnum_or_float (gid
)), attrs
);
2785 gr
= getgrgid (gid
);
2788 attrs
= Fcons (Fcons (Qgroup
, build_string (gr
->gr_name
)), attrs
);
2790 strcpy (fn
, procfn
);
2791 procfn_end
= fn
+ strlen (fn
);
2792 strcpy (procfn_end
, "/stat");
2793 fd
= emacs_open (fn
, O_RDONLY
, 0);
2794 if (fd
>= 0 && (nread
= emacs_read (fd
, procbuf
, sizeof (procbuf
) - 1)) > 0)
2796 procbuf
[nread
] = '\0';
2799 p
= strchr (p
, '(');
2802 q
= strrchr (p
+ 1, ')');
2817 /* Command name is encoded in locale-coding-system; decode it. */
2818 cmd_str
= make_unibyte_string (cmd
, cmdsize
);
2819 decoded_cmd
= code_convert_string_norecord (cmd_str
,
2820 Vlocale_coding_system
, 0);
2821 attrs
= Fcons (Fcons (Qcomm
, decoded_cmd
), attrs
);
2825 EMACS_INT ppid_eint
, pgrp_eint
, sess_eint
, tpgid_eint
, thcount_eint
;
2827 /* state ppid pgrp sess tty tpgid . minflt cminflt majflt cmajflt utime stime cutime cstime priority nice thcount . start vsize rss */
2828 sscanf (p
, "%c %d %d %d %d %d %*u %lu %lu %lu %lu %Lu %Lu %Lu %Lu %ld %ld %d %*d %Lu %lu %ld",
2829 &c
, &ppid
, &pgrp
, &sess
, &tty
, &tpgid
,
2830 &minflt
, &cminflt
, &majflt
, &cmajflt
,
2831 &u_time
, &s_time
, &cutime
, &cstime
,
2832 &priority
, &niceness
, &thcount
, &start
, &vsize
, &rss
);
2837 state_str
[1] = '\0';
2838 tem
= build_string (state_str
);
2839 attrs
= Fcons (Fcons (Qstate
, tem
), attrs
);
2841 /* Stops GCC whining about limited range of data type. */
2846 thcount_eint
= thcount
;
2847 attrs
= Fcons (Fcons (Qppid
, make_fixnum_or_float (ppid_eint
)), attrs
);
2848 attrs
= Fcons (Fcons (Qpgrp
, make_fixnum_or_float (pgrp_eint
)), attrs
);
2849 attrs
= Fcons (Fcons (Qsess
, make_fixnum_or_float (sess_eint
)), attrs
);
2850 attrs
= Fcons (Fcons (Qttname
, procfs_ttyname (tty
)), attrs
);
2851 attrs
= Fcons (Fcons (Qtpgid
, make_fixnum_or_float (tpgid_eint
)), attrs
);
2852 attrs
= Fcons (Fcons (Qminflt
, make_fixnum_or_float (minflt
)), attrs
);
2853 attrs
= Fcons (Fcons (Qmajflt
, make_fixnum_or_float (majflt
)), attrs
);
2854 attrs
= Fcons (Fcons (Qcminflt
, make_fixnum_or_float (cminflt
)), attrs
);
2855 attrs
= Fcons (Fcons (Qcmajflt
, make_fixnum_or_float (cmajflt
)), attrs
);
2856 clocks_per_sec
= sysconf (_SC_CLK_TCK
);
2857 if (clocks_per_sec
< 0)
2858 clocks_per_sec
= 100;
2859 attrs
= Fcons (Fcons (Qutime
,
2860 ltime_from_jiffies (u_time
, clocks_per_sec
)),
2862 attrs
= Fcons (Fcons (Qstime
,
2863 ltime_from_jiffies (s_time
, clocks_per_sec
)),
2865 attrs
= Fcons (Fcons (Qtime
,
2866 ltime_from_jiffies (s_time
+ u_time
,
2869 attrs
= Fcons (Fcons (Qcutime
,
2870 ltime_from_jiffies (cutime
, clocks_per_sec
)),
2872 attrs
= Fcons (Fcons (Qcstime
,
2873 ltime_from_jiffies (cstime
, clocks_per_sec
)),
2875 attrs
= Fcons (Fcons (Qctime
,
2876 ltime_from_jiffies (cstime
+cutime
, clocks_per_sec
)),
2878 attrs
= Fcons (Fcons (Qpri
, make_number (priority
)), attrs
);
2879 attrs
= Fcons (Fcons (Qnice
, make_number (niceness
)), attrs
);
2880 attrs
= Fcons (Fcons (Qthcount
, make_fixnum_or_float (thcount_eint
)), attrs
);
2881 EMACS_GET_TIME (tnow
);
2882 telapsed
= get_up_time ();
2883 EMACS_SUB_TIME (tboot
, tnow
, telapsed
);
2884 tstart
= time_from_jiffies (start
, clocks_per_sec
);
2885 EMACS_ADD_TIME (tstart
, tboot
, tstart
);
2886 attrs
= Fcons (Fcons (Qstart
, make_lisp_time (tstart
)), attrs
);
2887 attrs
= Fcons (Fcons (Qvsize
, make_fixnum_or_float (vsize
/1024)), attrs
);
2888 attrs
= Fcons (Fcons (Qrss
, make_fixnum_or_float (4*rss
)), attrs
);
2889 EMACS_SUB_TIME (telapsed
, tnow
, tstart
);
2890 attrs
= Fcons (Fcons (Qetime
, make_lisp_time (telapsed
)), attrs
);
2891 us_time
= time_from_jiffies (u_time
+ s_time
, clocks_per_sec
);
2892 pcpu
= (EMACS_TIME_TO_DOUBLE (us_time
)
2893 / EMACS_TIME_TO_DOUBLE (telapsed
));
2896 attrs
= Fcons (Fcons (Qpcpu
, make_float (100 * pcpu
)), attrs
);
2897 pmem
= 4.0 * 100 * rss
/ procfs_get_total_memory ();
2900 attrs
= Fcons (Fcons (Qpmem
, make_float (pmem
)), attrs
);
2907 strcpy (procfn_end
, "/cmdline");
2908 fd
= emacs_open (fn
, O_RDONLY
, 0);
2912 for (cmdline_size
= 0; cmdline_size
< STRING_BYTES_BOUND
; cmdline_size
++)
2914 if (emacs_read (fd
, &ch
, 1) != 1)
2917 if (isspace (c
) || c
== '\\')
2918 cmdline_size
++; /* for later quoting, see below */
2922 cmdline
= xmalloc (cmdline_size
+ 1);
2923 lseek (fd
, 0L, SEEK_SET
);
2925 if ((nread
= read (fd
, cmdline
, cmdline_size
)) >= 0)
2926 cmdline
[nread
++] = '\0';
2929 /* Assigning zero to `nread' makes us skip the following
2930 two loops, assign zero to cmdline_size, and enter the
2931 following `if' clause that handles unknown command
2935 /* We don't want trailing null characters. */
2936 for (p
= cmdline
+ nread
; p
> cmdline
+ 1 && !p
[-1]; p
--)
2938 for (p
= cmdline
; p
< cmdline
+ nread
; p
++)
2940 /* Escape-quote whitespace and backslashes. */
2941 if (isspace (*p
) || *p
== '\\')
2943 memmove (p
+ 1, p
, nread
- (p
- cmdline
));
2947 else if (*p
== '\0')
2950 cmdline_size
= nread
;
2957 cmdsize
= strlen (cmd
);
2958 cmdline_size
= cmdsize
+ 2;
2959 cmdline
= xmalloc (cmdline_size
+ 1);
2960 strcpy (cmdline
, "[");
2961 strcat (strncat (cmdline
, cmd
, cmdsize
), "]");
2964 /* Command line is encoded in locale-coding-system; decode it. */
2965 cmd_str
= make_unibyte_string (cmdline
, cmdline_size
);
2966 decoded_cmd
= code_convert_string_norecord (cmd_str
,
2967 Vlocale_coding_system
, 0);
2969 attrs
= Fcons (Fcons (Qargs
, decoded_cmd
), attrs
);
2976 #elif defined (SOLARIS2) && defined (HAVE_PROCFS)
2978 /* The <procfs.h> header does not like to be included if _LP64 is defined and
2979 __FILE_OFFSET_BITS == 64. This is an ugly workaround that. */
2980 #if !defined (_LP64) && defined (_FILE_OFFSET_BITS) && (_FILE_OFFSET_BITS == 64)
2981 #define PROCFS_FILE_OFFSET_BITS_HACK 1
2982 #undef _FILE_OFFSET_BITS
2984 #define PROCFS_FILE_OFFSET_BITS_HACK 0
2989 #if PROCFS_FILE_OFFSET_BITS_HACK == 1
2990 #define _FILE_OFFSET_BITS 64
2991 #ifdef _FILE_OFFSET_BITS /* Avoid unused-macro warnings. */
2993 #endif /* PROCFS_FILE_OFFSET_BITS_HACK == 1 */
2996 system_process_attributes (Lisp_Object pid
)
2998 char procfn
[PATH_MAX
], fn
[PATH_MAX
];
3003 struct psinfo pinfo
;
3009 Lisp_Object attrs
= Qnil
;
3010 Lisp_Object decoded_cmd
, tem
;
3011 struct gcpro gcpro1
, gcpro2
;
3013 CHECK_NUMBER_OR_FLOAT (pid
);
3014 CONS_TO_INTEGER (pid
, pid_t
, proc_id
);
3015 sprintf (procfn
, "/proc/%"pMd
, proc_id
);
3016 if (stat (procfn
, &st
) < 0)
3019 GCPRO2 (attrs
, decoded_cmd
);
3023 attrs
= Fcons (Fcons (Qeuid
, make_fixnum_or_float (uid
)), attrs
);
3025 pw
= getpwuid (uid
);
3028 attrs
= Fcons (Fcons (Quser
, build_string (pw
->pw_name
)), attrs
);
3031 attrs
= Fcons (Fcons (Qegid
, make_fixnum_or_float (gid
)), attrs
);
3033 gr
= getgrgid (gid
);
3036 attrs
= Fcons (Fcons (Qgroup
, build_string (gr
->gr_name
)), attrs
);
3038 strcpy (fn
, procfn
);
3039 procfn_end
= fn
+ strlen (fn
);
3040 strcpy (procfn_end
, "/psinfo");
3041 fd
= emacs_open (fn
, O_RDONLY
, 0);
3043 && (nread
= read (fd
, (char*)&pinfo
, sizeof (struct psinfo
)) > 0))
3045 attrs
= Fcons (Fcons (Qppid
, make_fixnum_or_float (pinfo
.pr_ppid
)), attrs
);
3046 attrs
= Fcons (Fcons (Qpgrp
, make_fixnum_or_float (pinfo
.pr_pgid
)), attrs
);
3047 attrs
= Fcons (Fcons (Qsess
, make_fixnum_or_float (pinfo
.pr_sid
)), attrs
);
3051 state_str
[0] = pinfo
.pr_lwp
.pr_sname
;
3052 state_str
[1] = '\0';
3053 tem
= build_string (state_str
);
3054 attrs
= Fcons (Fcons (Qstate
, tem
), attrs
);
3057 /* FIXME: missing Qttyname. psinfo.pr_ttydev is a dev_t,
3058 need to get a string from it. */
3060 /* FIXME: missing: Qtpgid */
3072 Are they available? */
3074 attrs
= Fcons (Fcons (Qtime
, make_lisp_time (pinfo
.pr_time
)), attrs
);
3075 attrs
= Fcons (Fcons (Qctime
, make_lisp_time (pinfo
.pr_ctime
)), attrs
);
3076 attrs
= Fcons (Fcons (Qpri
, make_number (pinfo
.pr_lwp
.pr_pri
)), attrs
);
3077 attrs
= Fcons (Fcons (Qnice
, make_number (pinfo
.pr_lwp
.pr_nice
)), attrs
);
3078 attrs
= Fcons (Fcons (Qthcount
, make_fixnum_or_float (pinfo
.pr_nlwp
)), attrs
);
3080 attrs
= Fcons (Fcons (Qstart
, make_lisp_time (pinfo
.pr_start
)), attrs
);
3081 attrs
= Fcons (Fcons (Qvsize
, make_fixnum_or_float (pinfo
.pr_size
)), attrs
);
3082 attrs
= Fcons (Fcons (Qrss
, make_fixnum_or_float (pinfo
.pr_rssize
)), attrs
);
3084 /* pr_pctcpu and pr_pctmem are unsigned integers in the
3085 range 0 .. 2**15, representing 0.0 .. 1.0. */
3086 attrs
= Fcons (Fcons (Qpcpu
, make_float (100.0 / 0x8000 * pinfo
.pr_pctcpu
)), attrs
);
3087 attrs
= Fcons (Fcons (Qpmem
, make_float (100.0 / 0x8000 * pinfo
.pr_pctmem
)), attrs
);
3090 = code_convert_string_norecord (make_unibyte_string (pinfo
.pr_fname
,
3091 strlen (pinfo
.pr_fname
)),
3092 Vlocale_coding_system
, 0);
3093 attrs
= Fcons (Fcons (Qcomm
, decoded_cmd
), attrs
);
3095 = code_convert_string_norecord (make_unibyte_string (pinfo
.pr_psargs
,
3096 strlen (pinfo
.pr_psargs
)),
3097 Vlocale_coding_system
, 0);
3098 attrs
= Fcons (Fcons (Qargs
, decoded_cmd
), attrs
);
3108 #elif defined __FreeBSD__
3111 timeval_to_EMACS_TIME (struct timeval t
)
3114 EMACS_SET_SECS_NSECS (e
, t
.tv_sec
, t
.tv_usec
* 1000);
3119 make_lisp_timeval (struct timeval t
)
3121 return make_lisp_time (timeval_to_EMACS_TIME (t
));
3125 system_process_attributes (Lisp_Object pid
)
3128 int pagesize
= getpagesize ();
3135 char args
[MAXPATHLEN
];
3138 int mib
[4] = {CTL_KERN
, KERN_PROC
, KERN_PROC_PID
};
3139 struct kinfo_proc proc
;
3140 size_t proclen
= sizeof proc
;
3142 struct gcpro gcpro1
, gcpro2
;
3143 Lisp_Object attrs
= Qnil
;
3144 Lisp_Object decoded_comm
;
3146 CHECK_NUMBER_OR_FLOAT (pid
);
3147 CONS_TO_INTEGER (pid
, int, proc_id
);
3150 if (sysctl (mib
, 4, &proc
, &proclen
, NULL
, 0) != 0)
3153 GCPRO2 (attrs
, decoded_comm
);
3155 attrs
= Fcons (Fcons (Qeuid
, make_fixnum_or_float (proc
.ki_uid
)), attrs
);
3158 pw
= getpwuid (proc
.ki_uid
);
3161 attrs
= Fcons (Fcons (Quser
, build_string (pw
->pw_name
)), attrs
);
3163 attrs
= Fcons (Fcons (Qegid
, make_fixnum_or_float (proc
.ki_svgid
)), attrs
);
3166 gr
= getgrgid (proc
.ki_svgid
);
3169 attrs
= Fcons (Fcons (Qgroup
, build_string (gr
->gr_name
)), attrs
);
3171 decoded_comm
= code_convert_string_norecord
3172 (make_unibyte_string (proc
.ki_comm
, strlen (proc
.ki_comm
)),
3173 Vlocale_coding_system
, 0);
3175 attrs
= Fcons (Fcons (Qcomm
, decoded_comm
), attrs
);
3177 char state
[2] = {'\0', '\0'};
3178 switch (proc
.ki_stat
)
3200 attrs
= Fcons (Fcons (Qstate
, build_string (state
)), attrs
);
3203 attrs
= Fcons (Fcons (Qppid
, make_fixnum_or_float (proc
.ki_ppid
)), attrs
);
3204 attrs
= Fcons (Fcons (Qpgrp
, make_fixnum_or_float (proc
.ki_pgid
)), attrs
);
3205 attrs
= Fcons (Fcons (Qsess
, make_fixnum_or_float (proc
.ki_sid
)), attrs
);
3208 ttyname
= proc
.ki_tdev
== NODEV
? NULL
: devname (proc
.ki_tdev
, S_IFCHR
);
3211 attrs
= Fcons (Fcons (Qtty
, build_string (ttyname
)), attrs
);
3213 attrs
= Fcons (Fcons (Qtpgid
, make_fixnum_or_float (proc
.ki_tpgid
)), attrs
);
3214 attrs
= Fcons (Fcons (Qminflt
, make_fixnum_or_float (proc
.ki_rusage
.ru_minflt
)), attrs
);
3215 attrs
= Fcons (Fcons (Qmajflt
, make_fixnum_or_float (proc
.ki_rusage
.ru_majflt
)), attrs
);
3216 attrs
= Fcons (Fcons (Qcminflt
, make_number (proc
.ki_rusage_ch
.ru_minflt
)), attrs
);
3217 attrs
= Fcons (Fcons (Qcmajflt
, make_number (proc
.ki_rusage_ch
.ru_majflt
)), attrs
);
3219 attrs
= Fcons (Fcons (Qutime
, make_lisp_timeval (proc
.ki_rusage
.ru_utime
)),
3221 attrs
= Fcons (Fcons (Qstime
, make_lisp_timeval (proc
.ki_rusage
.ru_stime
)),
3224 timeval_to_EMACS_TIME (proc
.ki_rusage
.ru_utime
),
3225 timeval_to_EMACS_TIME (proc
.ki_rusage
.ru_stime
));
3226 attrs
= Fcons (Fcons (Qtime
, make_lisp_time (t
)), attrs
);
3228 attrs
= Fcons (Fcons (Qcutime
,
3229 make_lisp_timeval (proc
.ki_rusage_ch
.ru_utime
)),
3231 attrs
= Fcons (Fcons (Qcstime
,
3232 make_lisp_timeval (proc
.ki_rusage_ch
.ru_utime
)),
3235 timeval_to_EMACS_TIME (proc
.ki_rusage_ch
.ru_utime
),
3236 timeval_to_EMACS_TIME (proc
.ki_rusage_ch
.ru_stime
));
3237 attrs
= Fcons (Fcons (Qctime
, make_lisp_time (t
)), attrs
);
3239 attrs
= Fcons (Fcons (Qthcount
, make_fixnum_or_float (proc
.ki_numthreads
)),
3241 attrs
= Fcons (Fcons (Qpri
, make_number (proc
.ki_pri
.pri_native
)), attrs
);
3242 attrs
= Fcons (Fcons (Qnice
, make_number (proc
.ki_nice
)), attrs
);
3243 attrs
= Fcons (Fcons (Qstart
, make_lisp_timeval (proc
.ki_start
)), attrs
);
3244 attrs
= Fcons (Fcons (Qvsize
, make_number (proc
.ki_size
>> 10)), attrs
);
3245 attrs
= Fcons (Fcons (Qrss
, make_number (proc
.ki_rssize
* pagesize
>> 10)),
3248 EMACS_GET_TIME (now
);
3249 EMACS_SUB_TIME (t
, now
, timeval_to_EMACS_TIME (proc
.ki_start
));
3250 attrs
= Fcons (Fcons (Qetime
, make_lisp_time (t
)), attrs
);
3252 len
= sizeof fscale
;
3253 if (sysctlbyname ("kern.fscale", &fscale
, &len
, NULL
, 0) == 0)
3258 if (sysctlbyname ("kern.ccpu", &ccpu
, &len
, NULL
, 0) == 0)
3260 pcpu
= (100.0 * proc
.ki_pctcpu
/ fscale
3261 / (1 - exp (proc
.ki_swtime
* log ((double) ccpu
/ fscale
))));
3262 attrs
= Fcons (Fcons (Qpcpu
, make_fixnum_or_float (pcpu
)), attrs
);
3266 len
= sizeof npages
;
3267 if (sysctlbyname ("hw.availpages", &npages
, &len
, NULL
, 0) == 0)
3269 double pmem
= (proc
.ki_flag
& P_INMEM
3270 ? 100.0 * proc
.ki_rssize
/ npages
3272 attrs
= Fcons (Fcons (Qpmem
, make_fixnum_or_float (pmem
)), attrs
);
3275 mib
[2] = KERN_PROC_ARGS
;
3277 if (sysctl (mib
, 4, args
, &len
, NULL
, 0) == 0)
3280 for (i
= 0; i
< len
; i
++)
3282 if (! args
[i
] && i
< len
- 1)
3287 (code_convert_string_norecord
3288 (make_unibyte_string (args
, strlen (args
)),
3289 Vlocale_coding_system
, 0));
3291 attrs
= Fcons (Fcons (Qargs
, decoded_comm
), attrs
);
3298 /* The WINDOWSNT implementation is in w32.c.
3299 The MSDOS implementation is in dosfns.c. */
3300 #elif !defined (WINDOWSNT) && !defined (MSDOS)
3303 system_process_attributes (Lisp_Object pid
)
3308 #endif /* !defined (WINDOWSNT) */