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/param.h>
43 #include <sys/sysctl.h>
48 #include <sys/resource.h>
54 #define write sys_write
56 #endif /* not WINDOWSNT */
58 #include <sys/types.h>
62 /* Get SI_SRPC_DOMAIN, if it is available. */
63 #ifdef HAVE_SYS_SYSTEMINFO_H
64 #include <sys/systeminfo.h>
67 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida, MW Aug 1993 */
69 #include <sys/param.h>
78 #ifdef HAVE_SYS_UTSNAME_H
79 #include <sys/utsname.h>
81 #endif /* HAVE_SYS_UTSNAME_H */
86 #include "termhooks.h"
89 #include "dispextern.h"
91 #include "cm.h" /* for reset_sys_modes */
95 /* In process.h which conflicts with the local copy. */
97 int _cdecl
_spawnlp (int, const char *, const char *, ...);
98 int _cdecl
_getpid (void);
99 extern char *getwd (char *);
102 #include "syssignal.h"
105 static int emacs_get_tty (int, struct emacs_tty
*);
106 static int emacs_set_tty (int, struct emacs_tty
*, int);
107 #if defined TIOCNOTTY || defined USG5 || defined CYGWIN
108 static _Noreturn
void croak (char *);
111 /* Declare here, including term.h is problematic on some systems. */
112 extern void tputs (const char *, int, int (*)(int));
114 static const int baud_convert
[] =
116 0, 50, 75, 110, 135, 150, 200, 300, 600, 1200,
117 1800, 2400, 4800, 9600, 19200, 38400
121 #if !defined (HAVE_GET_CURRENT_DIR_NAME) || defined (BROKEN_GET_CURRENT_DIR_NAME)
123 /* Return the current working directory. Returns NULL on errors.
124 Any other returned value must be freed with free. This is used
125 only when get_current_dir_name is not defined on the system. */
127 get_current_dir_name (void)
131 struct stat dotstat
, pwdstat
;
132 /* If PWD is accurate, use it instead of calling getwd. PWD is
133 sometimes a nicer name, and using it may avoid a fatal error if a
134 parent directory is searchable but not readable. */
135 if ((pwd
= getenv ("PWD")) != 0
136 && (IS_DIRECTORY_SEP (*pwd
) || (*pwd
&& IS_DEVICE_SEP (pwd
[1])))
137 && stat (pwd
, &pwdstat
) == 0
138 && stat (".", &dotstat
) == 0
139 && dotstat
.st_ino
== pwdstat
.st_ino
140 && dotstat
.st_dev
== pwdstat
.st_dev
142 && strlen (pwd
) < MAXPATHLEN
146 buf
= malloc (strlen (pwd
) + 1);
154 size_t buf_size
= 1024;
155 buf
= malloc (buf_size
);
160 if (getcwd (buf
, buf_size
) == buf
)
164 int tmp_errno
= errno
;
170 buf
= realloc (buf
, buf_size
);
178 /* We need MAXPATHLEN here. */
179 buf
= malloc (MAXPATHLEN
+ 1);
182 if (getwd (buf
) == NULL
)
184 int tmp_errno
= errno
;
196 /* Discard pending input on all input descriptors. */
199 discard_tty_input (void)
202 struct emacs_tty buf
;
207 #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */
208 while (dos_keyread () != -1)
210 #else /* not MSDOS */
212 struct tty_display_info
*tty
;
213 for (tty
= tty_list
; tty
; tty
= tty
->next
)
215 if (tty
->input
) /* Is the device suspended? */
217 emacs_get_tty (fileno (tty
->input
), &buf
);
218 emacs_set_tty (fileno (tty
->input
), &buf
, 0);
222 #endif /* not MSDOS */
223 #endif /* not WINDOWSNT */
229 /* Arrange for character C to be read as the next input from
231 XXX What if we have multiple ttys?
237 if (! FRAME_TERMCAP_P (SELECTED_FRAME ()))
240 /* Should perhaps error if in batch mode */
242 ioctl (fileno (CURTTY()->input
), TIOCSTI
, &c
);
243 #else /* no TIOCSTI */
244 error ("Cannot stuff terminal input characters in this version of Unix");
245 #endif /* no TIOCSTI */
251 init_baud_rate (int fd
)
261 #else /* not DOS_NT */
266 emacs_ospeed
= cfgetospeed (&sg
);
267 #endif /* not DOS_NT */
270 baud_rate
= (emacs_ospeed
< sizeof baud_convert
/ sizeof baud_convert
[0]
271 ? baud_convert
[emacs_ospeed
] : 9600);
278 /* Set nonzero to make following function work under dbx
279 (at least for bsd). */
280 int wait_debugging EXTERNALLY_VISIBLE
;
285 wait_for_termination_1 (pid_t pid
, int interruptible
)
289 #if (defined (BSD_SYSTEM) || defined (HPUX)) && !defined (__GNU__)
290 /* Note that kill returns -1 even if the process is just a zombie now.
291 But inevitably a SIGCHLD interrupt should be generated
292 and child_sig will do wait3 and make the process go away. */
293 /* There is some indication that there is a bug involved with
294 termination of subprocesses, perhaps involving a kernel bug too,
295 but no idea what it is. Just as a hunch we signal SIGCHLD to see
296 if that causes the problem to go away or get worse. */
297 sigsetmask (sigmask (SIGCHLD
));
298 if (0 > kill (pid
, 0))
300 sigsetmask (SIGEMPTYMASK
);
301 kill (getpid (), SIGCHLD
);
307 sigpause (SIGEMPTYMASK
);
308 #else /* not BSD_SYSTEM, and not HPUX version >= 6 */
312 #else /* not WINDOWSNT */
313 sigblock (sigmask (SIGCHLD
));
315 if (kill (pid
, 0) == -1 && errno
== ESRCH
)
317 sigunblock (sigmask (SIGCHLD
));
321 sigsuspend (&empty_mask
);
322 #endif /* not WINDOWSNT */
323 #endif /* not BSD_SYSTEM, and not HPUX version >= 6 */
329 /* Wait for subprocess with process id `pid' to terminate and
330 make sure it will get eliminated (not remain forever as a zombie) */
333 wait_for_termination (pid_t pid
)
335 wait_for_termination_1 (pid
, 0);
338 /* Like the above, but allow keyboard interruption. */
340 interruptible_wait_for_termination (pid_t pid
)
342 wait_for_termination_1 (pid
, 1);
346 * flush any pending output
347 * (may flush input as well; it does not matter the way we use it)
351 flush_pending_output (int channel
)
353 /* FIXME: maybe this function should be removed */
356 /* Set up the terminal at the other end of a pseudo-terminal that
357 we will be controlling an inferior through.
358 It should not echo or do line-editing, since that is done
359 in Emacs. No padding needed for insertion into an Emacs buffer. */
362 child_setup_tty (int out
)
367 emacs_get_tty (out
, &s
);
368 s
.main
.c_oflag
|= OPOST
; /* Enable output postprocessing */
369 s
.main
.c_oflag
&= ~ONLCR
; /* Disable map of NL to CR-NL on output */
371 /* http://lists.gnu.org/archive/html/emacs-devel/2008-05/msg00406.html
372 Some versions of GNU Hurd do not have FFDLY? */
374 s
.main
.c_oflag
&= ~(NLDLY
|CRDLY
|TABDLY
|BSDLY
|VTDLY
|FFDLY
);
375 /* No output delays */
377 s
.main
.c_oflag
&= ~(NLDLY
|CRDLY
|TABDLY
|BSDLY
|VTDLY
);
378 /* No output delays */
381 s
.main
.c_lflag
&= ~ECHO
; /* Disable echo */
382 s
.main
.c_lflag
|= ISIG
; /* Enable signals */
384 s
.main
.c_iflag
&= ~IUCLC
; /* Disable downcasing on input. */
387 s
.main
.c_iflag
&= ~ISTRIP
; /* don't strip 8th bit on input */
390 s
.main
.c_oflag
&= ~OLCUC
; /* Disable upcasing on output. */
392 s
.main
.c_oflag
&= ~TAB3
; /* Disable tab expansion */
393 s
.main
.c_cflag
= (s
.main
.c_cflag
& ~CSIZE
) | CS8
; /* Don't strip 8th bit */
394 s
.main
.c_cc
[VERASE
] = CDISABLE
; /* disable erase processing */
395 s
.main
.c_cc
[VKILL
] = CDISABLE
; /* disable kill processing */
398 s
.main
.c_cflag
= (s
.main
.c_cflag
& ~CBAUD
) | B9600
; /* baud rate sanity */
401 #ifdef SIGNALS_VIA_CHARACTERS
402 /* the QUIT and INTR character are used in process_send_signal
403 so set them here to something useful. */
404 if (s
.main
.c_cc
[VQUIT
] == CDISABLE
)
405 s
.main
.c_cc
[VQUIT
] = '\\'&037; /* Control-\ */
406 if (s
.main
.c_cc
[VINTR
] == CDISABLE
)
407 s
.main
.c_cc
[VINTR
] = 'C'&037; /* Control-C */
408 #endif /* not SIGNALS_VIA_CHARACTERS */
411 /* Also, PTY overloads NUL and BREAK.
412 don't ignore break, but don't signal either, so it looks like NUL. */
413 s
.main
.c_iflag
&= ~IGNBRK
;
414 s
.main
.c_iflag
&= ~BRKINT
;
415 /* rms: Formerly it set s.main.c_cc[VINTR] to 0377 here
416 unconditionally. Then a SIGNALS_VIA_CHARACTERS conditional
417 would force it to 0377. That looks like duplicated code. */
418 s
.main
.c_cflag
= (s
.main
.c_cflag
& ~CBAUD
) | B9600
; /* baud rate sanity */
421 /* We originally enabled ICANON (and set VEOF to 04), and then had
422 process.c send additional EOF chars to flush the output when faced
423 with long lines, but this leads to weird effects when the
424 subprocess has disabled ICANON and ends up seeing those spurious
425 extra EOFs. So we don't send EOFs any more in
426 process.c:send_process. First we tried to disable ICANON by
427 default, so if a subsprocess sets up ICANON, it's his problem (or
428 the Elisp package that talks to it) to deal with lines that are
429 too long. But this disables some features, such as the ability
430 to send EOF signals. So we re-enabled ICANON but there is no
431 more "send eof to flush" going on (which is wrong and unportable
432 in itself). The correct way to handle too much output is to
433 buffer what could not be written and then write it again when
434 select returns ok for writing. This has it own set of
435 problems. Write is now asynchronous, is that a problem? How much
436 do we buffer, and what do we do when that limit is reached? */
438 s
.main
.c_lflag
|= ICANON
; /* Enable line editing and eof processing */
439 s
.main
.c_cc
[VEOF
] = 'D'&037; /* Control-D */
440 #if 0 /* These settings only apply to non-ICANON mode. */
441 s
.main
.c_cc
[VMIN
] = 1;
442 s
.main
.c_cc
[VTIME
] = 0;
445 emacs_set_tty (out
, &s
, 0);
446 #endif /* not WINDOWSNT */
448 #endif /* not MSDOS */
451 /* Record a signal code and the handler for it. */
455 void (*handler
) (int);
458 static void save_signal_handlers (struct save_signal
*);
459 static void restore_signal_handlers (struct save_signal
*);
461 /* Suspend the Emacs process; give terminal to its superior. */
466 #if defined (SIGTSTP) && !defined (MSDOS)
469 int pgrp
= EMACS_GETPGRP (0);
470 EMACS_KILLPG (pgrp
, SIGTSTP
);
473 #else /* No SIGTSTP */
474 /* On a system where suspending is not implemented,
475 instead fork a subshell and let it talk directly to the terminal
479 #endif /* no SIGTSTP */
482 /* Fork a subshell. */
487 #ifdef DOS_NT /* Demacs 1.1.2 91/10/20 Manabu Higashida */
489 char oldwd
[MAXPATHLEN
+1]; /* Fixed length is safe on MSDOS. */
492 struct save_signal saved_handlers
[5];
494 unsigned char *volatile str_volatile
= 0;
498 saved_handlers
[0].code
= SIGINT
;
499 saved_handlers
[1].code
= SIGQUIT
;
500 saved_handlers
[2].code
= SIGTERM
;
502 saved_handlers
[3].code
= SIGIO
;
503 saved_handlers
[4].code
= 0;
505 saved_handlers
[3].code
= 0;
508 /* Mentioning current_buffer->buffer would mean including buffer.h,
509 which somehow wedges the hp compiler. So instead... */
511 dir
= intern ("default-directory");
512 if (NILP (Fboundp (dir
)))
514 dir
= Fsymbol_value (dir
);
518 dir
= expand_and_dir_to_file (Funhandled_file_name_directory (dir
), Qnil
);
519 str_volatile
= str
= alloca (SCHARS (dir
) + 2);
521 memcpy (str
, SDATA (dir
), len
);
522 if (str
[len
- 1] != '/') str
[len
++] = '/';
528 save_signal_handlers (saved_handlers
);
529 synch_process_alive
= 1;
533 error ("Can't spawn subshell");
540 #ifdef DOS_NT /* MW, Aug 1993 */
543 sh
= (char *) egetenv ("SUSPEND"); /* KFS, 1994-12-14 */
546 sh
= (char *) egetenv ("SHELL");
550 /* Use our buffer's default directory for the subshell. */
552 if (str
&& chdir ((char *) str
) != 0)
555 ignore_value (write (1, "Can't chdir\n", 12));
560 close_process_descs (); /* Close Emacs's pipes/ptys */
562 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */
564 char *epwd
= getenv ("PWD");
565 char old_pwd
[MAXPATHLEN
+1+4];
567 /* If PWD is set, pass it with corrected value. */
570 strcpy (old_pwd
, epwd
);
571 if (str
[len
- 1] == '/')
573 setenv ("PWD", str
, 1);
576 chdir (oldwd
); /* FIXME: Do the right thing on chdir failure. */
578 putenv (old_pwd
); /* restore previous value */
580 #else /* not MSDOS */
582 /* Waits for process completion */
583 pid
= _spawnlp (_P_WAIT
, sh
, sh
, NULL
);
584 chdir (oldwd
); /* FIXME: Do the right thing on chdir failure. */
586 write (1, "Can't execute subshell", 22);
587 #else /* not WINDOWSNT */
588 execlp (sh
, sh
, (char *) 0);
589 ignore_value (write (1, "Can't execute subshell", 22));
591 #endif /* not WINDOWSNT */
592 #endif /* not MSDOS */
595 /* Do this now if we did not do it before. */
597 save_signal_handlers (saved_handlers
);
598 synch_process_alive
= 1;
602 wait_for_termination (pid
);
604 restore_signal_handlers (saved_handlers
);
605 synch_process_alive
= 0;
609 save_signal_handlers (struct save_signal
*saved_handlers
)
611 while (saved_handlers
->code
)
613 saved_handlers
->handler
614 = (void (*) (int)) signal (saved_handlers
->code
, SIG_IGN
);
620 restore_signal_handlers (struct save_signal
*saved_handlers
)
622 while (saved_handlers
->code
)
624 signal (saved_handlers
->code
, saved_handlers
->handler
);
630 /* If SIGIO is broken, don't do anything. */
647 unrequest_sigio (void)
654 static int old_fcntl_flags
[MAXDESC
];
660 old_fcntl_flags
[fd
] = fcntl (fd
, F_GETFL
, 0) & ~FASYNC
;
661 fcntl (fd
, F_SETFL
, old_fcntl_flags
[fd
] | FASYNC
);
663 interrupts_deferred
= 0;
670 fcntl (fd
, F_SETFL
, old_fcntl_flags
[fd
]);
674 #ifdef FASYNC /* F_SETFL does not imply existence of FASYNC */
675 /* XXX Uhm, FASYNC is not used anymore here. */
676 /* XXX Yeah, but you need it for SIGIO, don't you? */
685 sigunblock (sigmask (SIGWINCH
));
687 sigunblock (sigmask (SIGIO
));
689 interrupts_deferred
= 0;
693 unrequest_sigio (void)
698 #if 0 /* XXX What's wrong with blocking SIGIO under X? */
704 sigblock (sigmask (SIGWINCH
));
706 sigblock (sigmask (SIGIO
));
707 interrupts_deferred
= 1;
710 #else /* no FASYNC */
716 if (noninteractive
|| read_socket_hook
)
719 croak ("request_sigio");
723 unrequest_sigio (void)
725 if (noninteractive
|| read_socket_hook
)
728 croak ("unrequest_sigio");
737 /* Getting and setting emacs_tty structures. */
739 /* Set *TC to the parameters associated with the terminal FD.
740 Return zero if all's well, or -1 if we ran into an error we
741 couldn't deal with. */
743 emacs_get_tty (int fd
, struct emacs_tty
*settings
)
745 /* Retrieve the primary parameters - baud rate, character size, etcetera. */
747 /* We have those nifty POSIX tcmumbleattr functions. */
748 memset (&settings
->main
, 0, sizeof (settings
->main
));
749 if (tcgetattr (fd
, &settings
->main
) < 0)
753 /* We have survived the tempest. */
758 /* Set the parameters of the tty on FD according to the contents of
759 *SETTINGS. If FLUSHP is non-zero, we discard input.
760 Return 0 if all went well, and -1 if anything failed. */
763 emacs_set_tty (int fd
, struct emacs_tty
*settings
, int flushp
)
765 /* Set the primary parameters - baud rate, character size, etcetera. */
768 /* We have those nifty POSIX tcmumbleattr functions.
769 William J. Smith <wjs@wiis.wang.com> writes:
770 "POSIX 1003.1 defines tcsetattr to return success if it was
771 able to perform any of the requested actions, even if some
772 of the requested actions could not be performed.
773 We must read settings back to ensure tty setup properly.
774 AIX requires this to keep tty from hanging occasionally." */
775 /* This make sure that we don't loop indefinitely in here. */
776 for (i
= 0 ; i
< 10 ; i
++)
777 if (tcsetattr (fd
, flushp
? TCSAFLUSH
: TCSADRAIN
, &settings
->main
) < 0)
788 memset (&new, 0, sizeof (new));
789 /* Get the current settings, and see if they're what we asked for. */
790 tcgetattr (fd
, &new);
791 /* We cannot use memcmp on the whole structure here because under
792 * aix386 the termios structure has some reserved field that may
795 if ( new.c_iflag
== settings
->main
.c_iflag
796 && new.c_oflag
== settings
->main
.c_oflag
797 && new.c_cflag
== settings
->main
.c_cflag
798 && new.c_lflag
== settings
->main
.c_lflag
799 && memcmp (new.c_cc
, settings
->main
.c_cc
, NCCS
) == 0)
806 /* We have survived the tempest. */
813 static int old_fcntl_owner
[MAXDESC
];
814 #endif /* F_SETOWN */
816 /* This may also be defined in stdio,
817 but if so, this does no harm,
818 and using the same name avoids wasting the other one's space. */
821 unsigned char _sobuf
[BUFSIZ
+8];
826 /* Initialize the terminal mode on all tty devices that are currently
830 init_all_sys_modes (void)
832 struct tty_display_info
*tty
;
833 for (tty
= tty_list
; tty
; tty
= tty
->next
)
834 init_sys_modes (tty
);
837 /* Initialize the terminal mode on the given tty device. */
840 init_sys_modes (struct tty_display_info
*tty_out
)
842 struct emacs_tty tty
;
843 Lisp_Object terminal
;
845 Vtty_erase_char
= Qnil
;
850 if (!tty_out
->output
)
851 return; /* The tty is suspended. */
853 if (! tty_out
->old_tty
)
854 tty_out
->old_tty
= xmalloc (sizeof *tty_out
->old_tty
);
856 emacs_get_tty (fileno (tty_out
->input
), tty_out
->old_tty
);
858 tty
= *tty_out
->old_tty
;
860 #if !defined (DOS_NT)
861 XSETINT (Vtty_erase_char
, tty
.main
.c_cc
[VERASE
]);
863 tty
.main
.c_iflag
|= (IGNBRK
); /* Ignore break condition */
864 tty
.main
.c_iflag
&= ~ICRNL
; /* Disable map of CR to NL on input */
865 #ifdef INLCR /* I'm just being cautious,
866 since I can't check how widespread INLCR is--rms. */
867 tty
.main
.c_iflag
&= ~INLCR
; /* Disable map of NL to CR on input */
870 tty
.main
.c_iflag
&= ~ISTRIP
; /* don't strip 8th bit on input */
872 tty
.main
.c_lflag
&= ~ECHO
; /* Disable echo */
873 tty
.main
.c_lflag
&= ~ICANON
; /* Disable erase/kill processing */
875 tty
.main
.c_lflag
&= ~IEXTEN
; /* Disable other editing characters. */
877 tty
.main
.c_lflag
|= ISIG
; /* Enable signals */
878 if (tty_out
->flow_control
)
880 tty
.main
.c_iflag
|= IXON
; /* Enable start/stop output control */
882 tty
.main
.c_iflag
&= ~IXANY
;
886 tty
.main
.c_iflag
&= ~IXON
; /* Disable start/stop output control */
887 tty
.main
.c_oflag
&= ~ONLCR
; /* Disable map of NL to CR-NL
889 tty
.main
.c_oflag
&= ~TAB3
; /* Disable tab expansion */
891 if (tty_out
->meta_key
)
893 tty
.main
.c_cflag
|= CS8
; /* allow 8th bit on input */
894 tty
.main
.c_cflag
&= ~PARENB
;/* Don't check parity */
898 XSETTERMINAL(terminal
, tty_out
->terminal
);
899 if (!NILP (Fcontrolling_tty_p (terminal
)))
901 tty
.main
.c_cc
[VINTR
] = quit_char
; /* C-g (usually) gives SIGINT */
902 /* Set up C-g for both SIGQUIT and SIGINT.
903 We don't know which we will get, but we handle both alike
904 so which one it really gives us does not matter. */
905 tty
.main
.c_cc
[VQUIT
] = quit_char
;
909 /* We normally don't get interrupt or quit signals from tty
910 devices other than our controlling terminal; therefore,
911 we must handle C-g as normal input. Unfortunately, this
912 means that the interrupt and quit feature must be
913 disabled on secondary ttys, or we would not even see the
916 Note that even though emacsclient could have special code
917 to pass SIGINT to Emacs, we should _not_ enable
918 interrupt/quit keys for emacsclient frames. This means
919 that we can't break out of loops in C code from a
920 secondary tty frame, but we can always decide what
921 display the C-g came from, which is more important from a
922 usability point of view. (Consider the case when two
923 people work together using the same Emacs instance.) */
924 tty
.main
.c_cc
[VINTR
] = CDISABLE
;
925 tty
.main
.c_cc
[VQUIT
] = CDISABLE
;
927 tty
.main
.c_cc
[VMIN
] = 1; /* Input should wait for at least 1 char */
928 tty
.main
.c_cc
[VTIME
] = 0; /* no matter how long that takes. */
930 tty
.main
.c_cc
[VSWTCH
] = CDISABLE
; /* Turn off shell layering use
935 tty
.main
.c_cc
[VSUSP
] = CDISABLE
; /* Turn off handling of C-z. */
938 tty
.main
.c_cc
[V_DSUSP
] = CDISABLE
; /* Turn off handling of C-y. */
940 #ifdef VDSUSP /* Some systems have VDSUSP, some have V_DSUSP. */
941 tty
.main
.c_cc
[VDSUSP
] = CDISABLE
;
944 tty
.main
.c_cc
[VLNEXT
] = CDISABLE
;
947 tty
.main
.c_cc
[VREPRINT
] = CDISABLE
;
948 #endif /* VREPRINT */
950 tty
.main
.c_cc
[VWERASE
] = CDISABLE
;
953 tty
.main
.c_cc
[VDISCARD
] = CDISABLE
;
954 #endif /* VDISCARD */
956 if (tty_out
->flow_control
)
959 tty
.main
.c_cc
[VSTART
] = '\021';
962 tty
.main
.c_cc
[VSTOP
] = '\023';
968 tty
.main
.c_cc
[VSTART
] = CDISABLE
;
971 tty
.main
.c_cc
[VSTOP
] = CDISABLE
;
976 tty
.main
.c_cc
[VSTRT
] = CDISABLE
;
977 tty
.main
.c_cc
[VSTOP
] = CDISABLE
;
978 tty
.main
.c_cc
[VSUSP
] = CDISABLE
;
979 tty
.main
.c_cc
[VDSUSP
] = CDISABLE
;
980 if (tty_out
->flow_control
)
983 tty
.main
.c_cc
[VSTART
] = '\021';
986 tty
.main
.c_cc
[VSTOP
] = '\023';
989 /* Also, PTY overloads NUL and BREAK.
990 don't ignore break, but don't signal either, so it looks like NUL.
991 This really serves a purpose only if running in an XTERM window
992 or via TELNET or the like, but does no harm elsewhere. */
993 tty
.main
.c_iflag
&= ~IGNBRK
;
994 tty
.main
.c_iflag
&= ~BRKINT
;
996 #endif /* not DOS_NT */
998 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida, MW Aug 1993 */
999 if (!tty_out
->term_initted
)
1000 internal_terminal_init ();
1001 dos_ttraw (tty_out
);
1004 emacs_set_tty (fileno (tty_out
->input
), &tty
, 0);
1006 /* This code added to insure that, if flow-control is not to be used,
1007 we have an unlocked terminal at the start. */
1010 if (!tty_out
->flow_control
) ioctl (fileno (tty_out
->input
), TCXONC
, 1);
1013 if (!tty_out
->flow_control
) ioctl (fileno (tty_out
->input
), TIOCSTART
, 0);
1016 #if !defined (DOS_NT)
1018 if (!tty_out
->flow_control
) tcflow (fileno (tty_out
->input
), TCOON
);
1023 #ifdef F_GETOWN /* F_SETFL does not imply existence of F_GETOWN */
1024 if (interrupt_input
)
1026 old_fcntl_owner
[fileno (tty_out
->input
)] =
1027 fcntl (fileno (tty_out
->input
), F_GETOWN
, 0);
1028 fcntl (fileno (tty_out
->input
), F_SETOWN
, getpid ());
1029 init_sigio (fileno (tty_out
->input
));
1031 if (gpm_tty
== tty_out
)
1033 /* Arrange for mouse events to give us SIGIO signals. */
1034 fcntl (gpm_fd
, F_SETOWN
, getpid ());
1035 fcntl (gpm_fd
, F_SETFL
, fcntl (gpm_fd
, F_GETFL
, 0) | O_NONBLOCK
);
1036 init_sigio (gpm_fd
);
1038 #endif /* HAVE_GPM */
1040 #endif /* F_GETOWN */
1041 #endif /* F_SETFL */
1044 /* This symbol is defined on recent USG systems.
1045 Someone says without this call USG won't really buffer the file
1046 even with a call to setbuf. */
1047 setvbuf (tty_out
->output
, (char *) _sobuf
, _IOFBF
, sizeof _sobuf
);
1049 setbuf (tty_out
->output
, (char *) _sobuf
);
1052 if (tty_out
->terminal
->set_terminal_modes_hook
)
1053 tty_out
->terminal
->set_terminal_modes_hook (tty_out
->terminal
);
1055 if (!tty_out
->term_initted
)
1057 Lisp_Object tail
, frame
;
1058 FOR_EACH_FRAME (tail
, frame
)
1060 /* XXX This needs to be revised. */
1061 if (FRAME_TERMCAP_P (XFRAME (frame
))
1062 && FRAME_TTY (XFRAME (frame
)) == tty_out
)
1063 init_frame_faces (XFRAME (frame
));
1067 if (tty_out
->term_initted
&& no_redraw_on_reenter
)
1069 /* We used to call "direct_output_forward_char(0)" here,
1070 but it's not clear why, since it may not do anything anyway. */
1074 Lisp_Object tail
, frame
;
1076 FOR_EACH_FRAME (tail
, frame
)
1078 if ((FRAME_TERMCAP_P (XFRAME (frame
))
1079 || FRAME_MSDOS_P (XFRAME (frame
)))
1080 && FRAME_TTY (XFRAME (frame
)) == tty_out
)
1081 FRAME_GARBAGED_P (XFRAME (frame
)) = 1;
1085 tty_out
->term_initted
= 1;
1088 /* Return nonzero if safe to use tabs in output.
1089 At the time this is called, init_sys_modes has not been done yet. */
1092 tabs_safe_p (int fd
)
1094 struct emacs_tty etty
;
1096 emacs_get_tty (fd
, &etty
);
1099 return ((etty
.main
.c_oflag
& TABDLY
) != TAB3
);
1100 #else /* not TABDLY */
1102 #endif /* not TABDLY */
1108 /* Get terminal size from system.
1109 Store number of lines into *HEIGHTP and width into *WIDTHP.
1110 We store 0 if there's no valid information. */
1113 get_tty_size (int fd
, int *widthp
, int *heightp
)
1115 #if defined TIOCGWINSZ
1118 struct winsize size
;
1120 if (ioctl (fd
, TIOCGWINSZ
, &size
) == -1)
1121 *widthp
= *heightp
= 0;
1124 *widthp
= size
.ws_col
;
1125 *heightp
= size
.ws_row
;
1128 #elif defined TIOCGSIZE
1130 /* SunOS - style. */
1131 struct ttysize size
;
1133 if (ioctl (fd
, TIOCGSIZE
, &size
) == -1)
1134 *widthp
= *heightp
= 0;
1137 *widthp
= size
.ts_cols
;
1138 *heightp
= size
.ts_lines
;
1141 #elif defined WINDOWSNT
1143 CONSOLE_SCREEN_BUFFER_INFO info
;
1144 if (GetConsoleScreenBufferInfo (GetStdHandle (STD_OUTPUT_HANDLE
), &info
))
1146 *widthp
= info
.srWindow
.Right
- info
.srWindow
.Left
+ 1;
1147 *heightp
= info
.srWindow
.Bottom
- info
.srWindow
.Top
+ 1;
1150 *widthp
= *heightp
= 0;
1154 *widthp
= ScreenCols ();
1155 *heightp
= ScreenRows ();
1157 #else /* system doesn't know size */
1165 /* Set the logical window size associated with descriptor FD
1166 to HEIGHT and WIDTH. This is used mainly with ptys. */
1169 set_window_size (int fd
, int height
, int width
)
1174 struct winsize size
;
1175 size
.ws_row
= height
;
1176 size
.ws_col
= width
;
1178 if (ioctl (fd
, TIOCSWINSZ
, &size
) == -1)
1179 return 0; /* error */
1186 /* SunOS - style. */
1187 struct ttysize size
;
1188 size
.ts_lines
= height
;
1189 size
.ts_cols
= width
;
1191 if (ioctl (fd
, TIOCGSIZE
, &size
) == -1)
1197 #endif /* not SunOS-style */
1198 #endif /* not BSD-style */
1203 /* Prepare all terminal devices for exiting Emacs. */
1206 reset_all_sys_modes (void)
1208 struct tty_display_info
*tty
;
1209 for (tty
= tty_list
; tty
; tty
= tty
->next
)
1210 reset_sys_modes (tty
);
1213 /* Prepare the terminal for closing it; move the cursor to the
1214 bottom of the frame, turn off interrupt-driven I/O, etc. */
1217 reset_sys_modes (struct tty_display_info
*tty_out
)
1224 if (!tty_out
->term_initted
)
1227 if (!tty_out
->output
)
1228 return; /* The tty is suspended. */
1230 /* Go to and clear the last line of the terminal. */
1232 cmgoto (tty_out
, FrameRows (tty_out
) - 1, 0);
1234 /* Code adapted from tty_clear_end_of_line. */
1235 if (tty_out
->TS_clr_line
)
1237 emacs_tputs (tty_out
, tty_out
->TS_clr_line
, 1, cmputc
);
1240 { /* have to do it the hard way */
1242 tty_turn_off_insert (tty_out
);
1244 for (i
= curX (tty_out
); i
< FrameCols (tty_out
) - 1; i
++)
1246 fputc (' ', tty_out
->output
);
1250 cmgoto (tty_out
, FrameRows (tty_out
) - 1, 0);
1251 fflush (tty_out
->output
);
1253 if (tty_out
->terminal
->reset_terminal_modes_hook
)
1254 tty_out
->terminal
->reset_terminal_modes_hook (tty_out
->terminal
);
1257 /* Avoid possible loss of output when changing terminal modes. */
1258 fsync (fileno (tty_out
->output
));
1262 #ifdef F_SETOWN /* F_SETFL does not imply existence of F_SETOWN */
1263 if (interrupt_input
)
1265 reset_sigio (fileno (tty_out
->input
));
1266 fcntl (fileno (tty_out
->input
), F_SETOWN
,
1267 old_fcntl_owner
[fileno (tty_out
->input
)]);
1269 #endif /* F_SETOWN */
1271 fcntl (fileno (tty_out
->input
), F_SETFL
,
1272 fcntl (fileno (tty_out
->input
), F_GETFL
, 0) & ~O_NDELAY
);
1274 #endif /* F_SETFL */
1276 if (tty_out
->old_tty
)
1277 while (emacs_set_tty (fileno (tty_out
->input
),
1278 tty_out
->old_tty
, 0) < 0 && errno
== EINTR
)
1281 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */
1289 /* Set up the proper status flags for use of a pty. */
1294 /* I'm told that TOICREMOTE does not mean control chars
1295 "can't be sent" but rather that they don't have
1296 input-editing or signaling effects.
1297 That should be good, because we have other ways
1298 to do those things in Emacs.
1299 However, telnet mode seems not to work on 4.2.
1300 So TIOCREMOTE is turned off now. */
1302 /* Under hp-ux, if TIOCREMOTE is turned on, some calls
1303 will hang. In particular, the "timeout" feature (which
1304 causes a read to return if there is no data available)
1305 does this. Also it is known that telnet mode will hang
1306 in such a way that Emacs must be stopped (perhaps this
1307 is the same problem).
1309 If TIOCREMOTE is turned off, then there is a bug in
1310 hp-ux which sometimes loses data. Apparently the
1311 code which blocks the master process when the internal
1312 buffer fills up does not work. Other than this,
1313 though, everything else seems to work fine.
1315 Since the latter lossage is more benign, we may as well
1316 lose that way. -- cph */
1318 #if defined (UNIX98_PTYS)
1321 ioctl (fd
, FIONBIO
, &on
);
1326 #endif /* HAVE_PTYS */
1329 #include <sys/socket.h>
1331 #endif /* HAVE_SOCKETS */
1334 #ifndef HAVE_H_ERRNO
1337 #endif /* TRY_AGAIN */
1340 init_system_name (void)
1342 #ifndef HAVE_GETHOSTNAME
1345 Vsystem_name
= build_string (uts
.nodename
);
1346 #else /* HAVE_GETHOSTNAME */
1347 unsigned int hostname_size
= 256;
1348 char *hostname
= alloca (hostname_size
);
1350 /* Try to get the host name; if the buffer is too short, try
1351 again. Apparently, the only indication gethostname gives of
1352 whether the buffer was large enough is the presence or absence
1353 of a '\0' in the string. Eech. */
1356 gethostname (hostname
, hostname_size
- 1);
1357 hostname
[hostname_size
- 1] = '\0';
1359 /* Was the buffer large enough for the '\0'? */
1360 if (strlen (hostname
) < hostname_size
- 1)
1363 hostname_size
<<= 1;
1364 hostname
= alloca (hostname_size
);
1367 /* Turn the hostname into the official, fully-qualified hostname.
1368 Don't do this if we're going to dump; this can confuse system
1369 libraries on some machines and make the dumped emacs core dump. */
1372 #endif /* not CANNOT_DUMP */
1373 if (! strchr (hostname
, '.'))
1376 #ifdef HAVE_GETADDRINFO
1377 struct addrinfo
*res
;
1378 struct addrinfo hints
;
1381 memset (&hints
, 0, sizeof (hints
));
1382 hints
.ai_socktype
= SOCK_STREAM
;
1383 hints
.ai_flags
= AI_CANONNAME
;
1385 for (count
= 0;; count
++)
1387 if ((ret
= getaddrinfo (hostname
, NULL
, &hints
, &res
)) == 0
1388 || ret
!= EAI_AGAIN
)
1393 Fsleep_for (make_number (1), Qnil
);
1398 struct addrinfo
*it
= res
;
1401 char *fqdn
= it
->ai_canonname
;
1402 if (fqdn
&& strchr (fqdn
, '.')
1403 && strcmp (fqdn
, "localhost.localdomain") != 0)
1409 hostname
= alloca (strlen (it
->ai_canonname
) + 1);
1410 strcpy (hostname
, it
->ai_canonname
);
1414 #else /* !HAVE_GETADDRINFO */
1416 for (count
= 0;; count
++)
1422 hp
= gethostbyname (hostname
);
1424 if (! (hp
== 0 && h_errno
== TRY_AGAIN
))
1431 Fsleep_for (make_number (1), Qnil
);
1436 char *fqdn
= (char *) hp
->h_name
;
1438 if (!strchr (fqdn
, '.'))
1440 /* We still don't have a fully qualified domain name.
1441 Try to find one in the list of alternate names */
1442 char **alias
= hp
->h_aliases
;
1444 && (!strchr (*alias
, '.')
1445 || !strcmp (*alias
, "localhost.localdomain")))
1452 #endif /* !HAVE_GETADDRINFO */
1454 #endif /* HAVE_SOCKETS */
1455 Vsystem_name
= build_string (hostname
);
1456 #endif /* HAVE_GETHOSTNAME */
1459 for (p
= SDATA (Vsystem_name
); *p
; p
++)
1460 if (*p
== ' ' || *p
== '\t')
1465 /* POSIX signals support - DJB */
1466 /* Anyone with POSIX signals should have ANSI C declarations */
1468 sigset_t empty_mask
;
1473 sys_signal (int signal_number
, signal_handler_t action
)
1475 struct sigaction new_action
, old_action
;
1476 sigemptyset (&new_action
.sa_mask
);
1477 new_action
.sa_handler
= action
;
1478 new_action
.sa_flags
= 0;
1479 #if defined (SA_RESTART)
1480 /* Emacs mostly works better with restartable system services. If this
1481 flag exists, we probably want to turn it on here.
1482 However, on some systems this resets the timeout of `select'
1483 which means that `select' never finishes if it keeps getting signals.
1484 BROKEN_SA_RESTART is defined on those systems. */
1485 /* It's not clear why the comment above says "mostly works better". --Stef
1486 When SYNC_INPUT is set, we don't want SA_RESTART because we need to poll
1487 for pending input so we need long-running syscalls to be interrupted
1488 after a signal that sets the interrupt_input_pending flag. */
1489 /* Non-interactive keyboard input goes through stdio, where we always
1490 want restartable system calls. */
1491 # if defined (BROKEN_SA_RESTART) || defined (SYNC_INPUT)
1494 new_action
.sa_flags
= SA_RESTART
;
1496 sigaction (signal_number
, &new_action
, &old_action
);
1497 return (old_action
.sa_handler
);
1500 #endif /* WINDOWSNT */
1503 /* If we're compiling with GCC, we don't need this function, since it
1504 can be written as a macro. */
1506 sys_sigmask (int sig
)
1509 sigemptyset (&mask
);
1510 sigaddset (&mask
, sig
);
1515 /* I'd like to have these guys return pointers to the mask storage in here,
1516 but there'd be trouble if the code was saving multiple masks. I'll be
1517 safe and pass the structure. It normally won't be more than 2 bytes
1521 sys_sigblock (sigset_t new_mask
)
1524 pthread_sigmask (SIG_BLOCK
, &new_mask
, &old_mask
);
1529 sys_sigunblock (sigset_t new_mask
)
1532 pthread_sigmask (SIG_UNBLOCK
, &new_mask
, &old_mask
);
1537 sys_sigsetmask (sigset_t new_mask
)
1540 pthread_sigmask (SIG_SETMASK
, &new_mask
, &old_mask
);
1545 #if !defined HAVE_STRSIGNAL && !HAVE_DECL_SYS_SIGLIST
1546 static char *my_sys_siglist
[NSIG
];
1550 # define sys_siglist my_sys_siglist
1556 sigemptyset (&empty_mask
);
1558 #if !defined HAVE_STRSIGNAL && !HAVE_DECL_SYS_SIGLIST
1562 sys_siglist
[SIGABRT
] = "Aborted";
1565 sys_siglist
[SIGAIO
] = "LAN I/O interrupt";
1568 sys_siglist
[SIGALRM
] = "Alarm clock";
1571 sys_siglist
[SIGBUS
] = "Bus error";
1574 sys_siglist
[SIGCLD
] = "Child status changed";
1577 sys_siglist
[SIGCHLD
] = "Child status changed";
1580 sys_siglist
[SIGCONT
] = "Continued";
1583 sys_siglist
[SIGDANGER
] = "Swap space dangerously low";
1586 sys_siglist
[SIGDGNOTIFY
] = "Notification message in queue";
1589 sys_siglist
[SIGEMT
] = "Emulation trap";
1592 sys_siglist
[SIGFPE
] = "Arithmetic exception";
1595 sys_siglist
[SIGFREEZE
] = "SIGFREEZE";
1598 sys_siglist
[SIGGRANT
] = "Monitor mode granted";
1601 sys_siglist
[SIGHUP
] = "Hangup";
1604 sys_siglist
[SIGILL
] = "Illegal instruction";
1607 sys_siglist
[SIGINT
] = "Interrupt";
1610 sys_siglist
[SIGIO
] = "I/O possible";
1613 sys_siglist
[SIGIOINT
] = "I/O intervention required";
1616 sys_siglist
[SIGIOT
] = "IOT trap";
1619 sys_siglist
[SIGKILL
] = "Killed";
1622 sys_siglist
[SIGLOST
] = "Resource lost";
1625 sys_siglist
[SIGLWP
] = "SIGLWP";
1628 sys_siglist
[SIGMSG
] = "Monitor mode data available";
1631 sys_siglist
[SIGWIND
] = "SIGPHONE";
1634 sys_siglist
[SIGPIPE
] = "Broken pipe";
1637 sys_siglist
[SIGPOLL
] = "Pollable event occurred";
1640 sys_siglist
[SIGPROF
] = "Profiling timer expired";
1643 sys_siglist
[SIGPTY
] = "PTY I/O interrupt";
1646 sys_siglist
[SIGPWR
] = "Power-fail restart";
1649 sys_siglist
[SIGQUIT
] = "Quit";
1652 sys_siglist
[SIGRETRACT
] = "Need to relinquish monitor mode";
1655 sys_siglist
[SIGSAK
] = "Secure attention";
1658 sys_siglist
[SIGSEGV
] = "Segmentation violation";
1661 sys_siglist
[SIGSOUND
] = "Sound completed";
1664 sys_siglist
[SIGSTOP
] = "Stopped (signal)";
1667 sys_siglist
[SIGSTP
] = "Stopped (user)";
1670 sys_siglist
[SIGSYS
] = "Bad argument to system call";
1673 sys_siglist
[SIGTERM
] = "Terminated";
1676 sys_siglist
[SIGTHAW
] = "SIGTHAW";
1679 sys_siglist
[SIGTRAP
] = "Trace/breakpoint trap";
1682 sys_siglist
[SIGTSTP
] = "Stopped (user)";
1685 sys_siglist
[SIGTTIN
] = "Stopped (tty input)";
1688 sys_siglist
[SIGTTOU
] = "Stopped (tty output)";
1691 sys_siglist
[SIGURG
] = "Urgent I/O condition";
1694 sys_siglist
[SIGUSR1
] = "User defined signal 1";
1697 sys_siglist
[SIGUSR2
] = "User defined signal 2";
1700 sys_siglist
[SIGVTALRM
] = "Virtual timer expired";
1703 sys_siglist
[SIGWAITING
] = "Process's LWPs are blocked";
1706 sys_siglist
[SIGWINCH
] = "Window size changed";
1709 sys_siglist
[SIGWIND
] = "SIGWIND";
1712 sys_siglist
[SIGXCPU
] = "CPU time limit exceeded";
1715 sys_siglist
[SIGXFSZ
] = "File size limit exceeded";
1718 #endif /* !defined HAVE_STRSIGNAL && !defined HAVE_DECL_SYS_SIGLIST */
1727 /* Figure out how many bits the system's random number generator uses.
1728 `random' and `lrand48' are assumed to return 31 usable bits.
1729 BSD `rand' returns a 31 bit value but the low order bits are unusable;
1730 so we'll shift it and treat it like the 15-bit USG `rand'. */
1734 # define RAND_BITS 31
1735 # else /* !HAVE_RANDOM */
1736 # ifdef HAVE_LRAND48
1737 # define RAND_BITS 31
1738 # define random lrand48
1739 # else /* !HAVE_LRAND48 */
1740 # define RAND_BITS 15
1741 # if RAND_MAX == 32767
1742 # define random rand
1743 # else /* RAND_MAX != 32767 */
1744 # if RAND_MAX == 2147483647
1745 # define random() (rand () >> 16)
1746 # else /* RAND_MAX != 2147483647 */
1748 # define random rand
1750 # define random() (rand () >> 16)
1752 # endif /* RAND_MAX != 2147483647 */
1753 # endif /* RAND_MAX != 32767 */
1754 # endif /* !HAVE_LRAND48 */
1755 # endif /* !HAVE_RANDOM */
1756 #endif /* !RAND_BITS */
1759 seed_random (long int arg
)
1762 srandom ((unsigned int)arg
);
1764 # ifdef HAVE_LRAND48
1767 srand ((unsigned int)arg
);
1773 * Return a nonnegative random integer out of whatever we've got.
1774 * It contains enough bits to make a random (signed) Emacs fixnum.
1775 * This suffices even for a 64-bit architecture with a 15-bit rand.
1782 for (i
= 0; i
< (FIXNUM_BITS
+ RAND_BITS
- 1) / RAND_BITS
; i
++)
1783 val
= (random () ^ (val
<< RAND_BITS
)
1784 ^ (val
>> (BITS_PER_EMACS_INT
- RAND_BITS
)));
1785 val
^= val
>> (BITS_PER_EMACS_INT
- FIXNUM_BITS
);
1786 return val
& INTMASK
;
1789 #ifndef HAVE_STRERROR
1792 strerror (int errnum
)
1794 extern char *sys_errlist
[];
1795 extern int sys_nerr
;
1797 if (errnum
>= 0 && errnum
< sys_nerr
)
1798 return sys_errlist
[errnum
];
1799 return (char *) "Unknown error";
1801 #endif /* not WINDOWSNT */
1802 #endif /* ! HAVE_STRERROR */
1804 #ifndef HAVE_SNPRINTF
1805 /* Approximate snprintf as best we can on ancient hosts that lack it. */
1807 snprintf (char *buf
, size_t bufsize
, char const *format
, ...)
1809 ptrdiff_t size
= min (bufsize
, PTRDIFF_MAX
);
1810 ptrdiff_t nbytes
= size
- 1;
1815 va_start (ap
, format
);
1816 nbytes
= doprnt (buf
, size
, format
, 0, ap
);
1820 if (nbytes
== size
- 1)
1822 /* Calculate the length of the string that would have been created
1823 had the buffer been large enough. */
1824 char stackbuf
[4000];
1826 ptrdiff_t bsize
= sizeof stackbuf
;
1827 va_start (ap
, format
);
1828 nbytes
= evxprintf (&b
, &bsize
, stackbuf
, -1, format
, ap
);
1834 if (INT_MAX
< nbytes
)
1848 emacs_open (const char *path
, int oflag
, int mode
)
1850 register int rtnval
;
1852 while ((rtnval
= open (path
, oflag
, mode
)) == -1
1853 && (errno
== EINTR
))
1859 emacs_close (int fd
)
1862 register int rtnval
;
1864 while ((rtnval
= close (fd
)) == -1
1865 && (errno
== EINTR
))
1868 /* If close is interrupted SunOS 4.1 may or may not have closed the
1869 file descriptor. If it did the second close will fail with
1870 errno = EBADF. That means we have succeeded. */
1871 if (rtnval
== -1 && did_retry
&& errno
== EBADF
)
1877 /* Maximum number of bytes to read or write in a single system call.
1878 This works around a serious bug in Linux kernels before 2.6.16; see
1879 <https://bugzilla.redhat.com/show_bug.cgi?format=multiple&id=612839>.
1880 It's likely to work around similar bugs in other operating systems, so do it
1881 on all platforms. Round INT_MAX down to a page size, with the conservative
1882 assumption that page sizes are at most 2**18 bytes (any kernel with a
1883 page size larger than that shouldn't have the bug). */
1884 #ifndef MAX_RW_COUNT
1885 #define MAX_RW_COUNT (INT_MAX >> 18 << 18)
1888 /* Read from FILEDESC to a buffer BUF with size NBYTE, retrying if interrupted.
1889 Return the number of bytes read, which might be less than NBYTE.
1890 On error, set errno and return -1. */
1892 emacs_read (int fildes
, char *buf
, ptrdiff_t nbyte
)
1894 register ssize_t rtnval
;
1896 /* There is no need to check against MAX_RW_COUNT, since no caller ever
1897 passes a size that large to emacs_read. */
1899 while ((rtnval
= read (fildes
, buf
, nbyte
)) == -1
1900 && (errno
== EINTR
))
1905 /* Write to FILEDES from a buffer BUF with size NBYTE, retrying if interrupted
1906 or if a partial write occurs. Return the number of bytes written, setting
1907 errno if this is less than NBYTE. */
1909 emacs_write (int fildes
, const char *buf
, ptrdiff_t nbyte
)
1912 ptrdiff_t bytes_written
;
1918 rtnval
= write (fildes
, buf
, min (nbyte
, MAX_RW_COUNT
));
1925 /* I originally used `QUIT' but that might causes files to
1926 be truncated if you hit C-g in the middle of it. --Stef */
1927 process_pending_signals ();
1937 bytes_written
+= rtnval
;
1940 return (bytes_written
);
1943 static struct allocator
const emacs_norealloc_allocator
=
1944 { xmalloc
, NULL
, xfree
, memory_full
};
1946 /* Get the symbolic link value of FILENAME. Return a pointer to a
1947 NUL-terminated string. If readlink fails, return NULL and set
1948 errno. If the value fits in INITIAL_BUF, return INITIAL_BUF.
1949 Otherwise, allocate memory and return a pointer to that memory. If
1950 memory allocation fails, diagnose and fail without returning. If
1951 successful, store the length of the symbolic link into *LINKLEN. */
1953 emacs_readlink (char const *filename
, char initial_buf
[READLINK_BUFSIZE
])
1955 return careadlinkat (AT_FDCWD
, filename
, initial_buf
, READLINK_BUFSIZE
,
1956 &emacs_norealloc_allocator
, careadlinkatcwd
);
1961 * All of the following are for USG.
1963 * On USG systems the system calls are INTERRUPTIBLE by signals
1964 * that the user program has elected to catch. Thus the system call
1965 * must be retried in these cases. To handle this without massive
1966 * changes in the source code, we remap the standard system call names
1967 * to names for our own functions in sysdep.c that do the system call
1968 * with retries. Actually, for portability reasons, it is good
1969 * programming practice, as this example shows, to limit all actual
1970 * system calls to a single occurrence in the source. Sure, this
1971 * adds an extra level of function call overhead but it is almost
1972 * always negligible. Fred Fish, Unisoft Systems Inc.
1976 * Warning, this function may not duplicate 4.2 action properly
1977 * under error conditions.
1983 /* In 4.1, param.h fails to define this. */
1984 #define MAXPATHLEN 1024
1988 getwd (char *pathname
)
1990 char *npath
, *spath
;
1991 extern char *getcwd (char *, size_t);
1993 BLOCK_INPUT
; /* getcwd uses malloc */
1994 spath
= npath
= getcwd ((char *) 0, MAXPATHLEN
);
2000 /* On Altos 3068, getcwd can return @hostname/dir, so discard
2001 up to first slash. Should be harmless on other systems. */
2002 while (*npath
&& *npath
!= '/')
2004 strcpy (pathname
, npath
);
2005 free (spath
); /* getcwd uses malloc */
2010 #endif /* HAVE_GETWD */
2013 * Emulate rename using unlink/link. Note that this is
2014 * only partially correct. Also, doesn't enforce restriction
2015 * that files be of same type (regular->regular, dir->dir, etc).
2021 rename (const char *from
, const char *to
)
2023 if (access (from
, 0) == 0)
2026 if (link (from
, to
) == 0)
2027 if (unlink (from
) == 0)
2036 #if defined (HPUX) && !defined (HAVE_PERROR)
2038 /* HPUX curses library references perror, but as far as we know
2039 it won't be called. Anyway this definition will do for now. */
2045 #endif /* HPUX and not HAVE_PERROR */
2048 * This function will go away as soon as all the stubs fixed. (fnf)
2052 croak (char *badfunc
)
2054 printf ("%s not yet implemented\r\n", badfunc
);
2055 reset_all_sys_modes ();
2061 /* Directory routines for systems that don't have them. */
2063 #ifdef HAVE_DIRENT_H
2067 #if !defined (HAVE_CLOSEDIR)
2070 closedir (DIR *dirp
/* stream from opendir */)
2074 rtnval
= emacs_close (dirp
->dd_fd
);
2075 xfree ((char *) dirp
);
2079 #endif /* not HAVE_CLOSEDIR */
2080 #endif /* HAVE_DIRENT_H */
2083 /* Return a struct timeval that is roughly equivalent to T.
2084 Use the least timeval not less than T.
2085 Return an extremal value if the result would overflow. */
2087 make_timeval (EMACS_TIME t
)
2090 tv
.tv_sec
= t
.tv_sec
;
2091 tv
.tv_usec
= t
.tv_nsec
/ 1000;
2093 if (t
.tv_nsec
% 1000 != 0)
2095 if (tv
.tv_usec
< 999999)
2097 else if (tv
.tv_sec
< TYPE_MAXIMUM (time_t))
2107 /* Set the access and modification time stamps of FD (a.k.a. FILE) to be
2108 ATIME and MTIME, respectively.
2109 FD must be either negative -- in which case it is ignored --
2110 or a file descriptor that is open on FILE.
2111 If FD is nonnegative, then FILE can be NULL. */
2113 set_file_times (int fd
, const char *filename
,
2114 EMACS_TIME atime
, EMACS_TIME mtime
)
2116 struct timespec timespec
[2];
2117 timespec
[0] = atime
;
2118 timespec
[1] = mtime
;
2119 return fdutimens (fd
, filename
, timespec
);
2122 /* mkdir and rmdir functions, for systems which don't have them. */
2126 * Written by Robert Rother, Mariah Corporation, August 1985.
2128 * If you want it, it's yours. All I ask in return is that if you
2129 * figure out how to do this in a Bourne Shell script you send me
2131 * sdcsvax!rmr or rmr@uscd
2133 * Severely hacked over by John Gilmore to make a 4.2BSD compatible
2134 * subroutine. 11Mar86; hoptoad!gnu
2136 * Modified by rmtodd@uokmax 6-28-87 -- when making an already existing dir,
2137 * subroutine didn't return EEXIST. It does now.
2144 mkdir (char *dpath
, int dmode
)
2148 struct stat statbuf
;
2150 if (stat (dpath
, &statbuf
) == 0)
2152 errno
= EEXIST
; /* Stat worked, so it already exists */
2156 /* If stat fails for a reason other than non-existence, return error */
2157 if (errno
!= ENOENT
)
2160 synch_process_alive
= 1;
2161 switch (cpid
= fork ())
2164 case -1: /* Error in fork */
2165 return (-1); /* Errno is set already */
2167 case 0: /* Child process */
2169 * Cheap hack to set mode of new directory. Since this
2170 * child process is going away anyway, we zap its umask.
2171 * FIXME, this won't suffice to set SUID, SGID, etc. on this
2172 * directory. Does anybody care?
2174 status
= umask (0); /* Get current umask */
2175 status
= umask (status
| (0777 & ~dmode
)); /* Set for mkdir */
2176 fd
= emacs_open ("/dev/null", O_RDWR
, 0);
2183 execl ("/bin/mkdir", "mkdir", dpath
, (char *) 0);
2184 _exit (-1); /* Can't exec /bin/mkdir */
2186 default: /* Parent process */
2187 wait_for_termination (cpid
);
2190 if (synch_process_death
!= 0 || synch_process_retcode
!= 0
2191 || synch_process_termsig
!= 0)
2193 errno
= EIO
; /* We don't know why, but */
2194 return -1; /* /bin/mkdir failed */
2199 #endif /* not HAVE_MKDIR */
2205 int cpid
, status
, fd
;
2206 struct stat statbuf
;
2208 if (stat (dpath
, &statbuf
) != 0)
2210 /* Stat just set errno. We don't have to */
2214 synch_process_alive
= 1;
2215 switch (cpid
= fork ())
2218 case -1: /* Error in fork */
2219 return (-1); /* Errno is set already */
2221 case 0: /* Child process */
2222 fd
= emacs_open ("/dev/null", O_RDWR
, 0);
2229 execl ("/bin/rmdir", "rmdir", dpath
, (char *) 0);
2230 _exit (-1); /* Can't exec /bin/rmdir */
2232 default: /* Parent process */
2233 wait_for_termination (cpid
);
2236 if (synch_process_death
!= 0 || synch_process_retcode
!= 0
2237 || synch_process_termsig
!= 0)
2239 errno
= EIO
; /* We don't know why, but */
2240 return -1; /* /bin/rmdir failed */
2245 #endif /* !HAVE_RMDIR */
2248 #ifndef HAVE_STRSIGNAL
2250 strsignal (int code
)
2254 if (0 <= code
&& code
< NSIG
)
2256 /* Cast to suppress warning if the table has const char *. */
2257 signame
= (char *) sys_siglist
[code
];
2262 #endif /* HAVE_STRSIGNAL */
2265 /* For make-serial-process */
2267 serial_open (char *port
)
2271 fd
= emacs_open ((char*) port
,
2284 error ("Could not open %s: %s",
2285 port
, emacs_strerror (errno
));
2288 ioctl (fd
, TIOCEXCL
, (char *) 0);
2294 #if !defined (HAVE_CFMAKERAW)
2295 /* Workaround for targets which are missing cfmakeraw. */
2296 /* Pasted from man page. */
2298 cfmakeraw (struct termios
*termios_p
)
2300 termios_p
->c_iflag
&= ~(IGNBRK
|BRKINT
|PARMRK
|ISTRIP
|INLCR
|IGNCR
|ICRNL
|IXON
);
2301 termios_p
->c_oflag
&= ~OPOST
;
2302 termios_p
->c_lflag
&= ~(ECHO
|ECHONL
|ICANON
|ISIG
|IEXTEN
);
2303 termios_p
->c_cflag
&= ~(CSIZE
|PARENB
);
2304 termios_p
->c_cflag
|= CS8
;
2306 #endif /* !defined (HAVE_CFMAKERAW */
2308 #if !defined (HAVE_CFSETSPEED)
2309 /* Workaround for targets which are missing cfsetspeed. */
2311 cfsetspeed (struct termios
*termios_p
, speed_t vitesse
)
2313 return (cfsetispeed (termios_p
, vitesse
)
2314 + cfsetospeed (termios_p
, vitesse
));
2318 /* For serial-process-configure */
2320 serial_configure (struct Lisp_Process
*p
,
2321 Lisp_Object contact
)
2323 Lisp_Object childp2
= Qnil
;
2324 Lisp_Object tem
= Qnil
;
2325 struct termios attr
;
2327 char summary
[4] = "???"; /* This usually becomes "8N1". */
2329 childp2
= Fcopy_sequence (p
->childp
);
2331 /* Read port attributes and prepare default configuration. */
2332 err
= tcgetattr (p
->outfd
, &attr
);
2334 error ("tcgetattr() failed: %s", emacs_strerror (errno
));
2336 #if defined (CLOCAL)
2337 attr
.c_cflag
|= CLOCAL
;
2340 attr
.c_cflag
|= CREAD
;
2343 /* Configure speed. */
2344 if (!NILP (Fplist_member (contact
, QCspeed
)))
2345 tem
= Fplist_get (contact
, QCspeed
);
2347 tem
= Fplist_get (p
->childp
, QCspeed
);
2349 err
= cfsetspeed (&attr
, XINT (tem
));
2351 error ("cfsetspeed(%"pI
"d) failed: %s", XINT (tem
),
2352 emacs_strerror (errno
));
2353 childp2
= Fplist_put (childp2
, QCspeed
, tem
);
2355 /* Configure bytesize. */
2356 if (!NILP (Fplist_member (contact
, QCbytesize
)))
2357 tem
= Fplist_get (contact
, QCbytesize
);
2359 tem
= Fplist_get (p
->childp
, QCbytesize
);
2361 tem
= make_number (8);
2363 if (XINT (tem
) != 7 && XINT (tem
) != 8)
2364 error (":bytesize must be nil (8), 7, or 8");
2365 summary
[0] = XINT (tem
) + '0';
2366 #if defined (CSIZE) && defined (CS7) && defined (CS8)
2367 attr
.c_cflag
&= ~CSIZE
;
2368 attr
.c_cflag
|= ((XINT (tem
) == 7) ? CS7
: CS8
);
2370 /* Don't error on bytesize 8, which should be set by cfmakeraw. */
2371 if (XINT (tem
) != 8)
2372 error ("Bytesize cannot be changed");
2374 childp2
= Fplist_put (childp2
, QCbytesize
, tem
);
2376 /* Configure parity. */
2377 if (!NILP (Fplist_member (contact
, QCparity
)))
2378 tem
= Fplist_get (contact
, QCparity
);
2380 tem
= Fplist_get (p
->childp
, QCparity
);
2381 if (!NILP (tem
) && !EQ (tem
, Qeven
) && !EQ (tem
, Qodd
))
2382 error (":parity must be nil (no parity), `even', or `odd'");
2383 #if defined (PARENB) && defined (PARODD) && defined (IGNPAR) && defined (INPCK)
2384 attr
.c_cflag
&= ~(PARENB
| PARODD
);
2385 attr
.c_iflag
&= ~(IGNPAR
| INPCK
);
2390 else if (EQ (tem
, Qeven
))
2393 attr
.c_cflag
|= PARENB
;
2394 attr
.c_iflag
|= (IGNPAR
| INPCK
);
2396 else if (EQ (tem
, Qodd
))
2399 attr
.c_cflag
|= (PARENB
| PARODD
);
2400 attr
.c_iflag
|= (IGNPAR
| INPCK
);
2403 /* Don't error on no parity, which should be set by cfmakeraw. */
2405 error ("Parity cannot be configured");
2407 childp2
= Fplist_put (childp2
, QCparity
, tem
);
2409 /* Configure stopbits. */
2410 if (!NILP (Fplist_member (contact
, QCstopbits
)))
2411 tem
= Fplist_get (contact
, QCstopbits
);
2413 tem
= Fplist_get (p
->childp
, QCstopbits
);
2415 tem
= make_number (1);
2417 if (XINT (tem
) != 1 && XINT (tem
) != 2)
2418 error (":stopbits must be nil (1 stopbit), 1, or 2");
2419 summary
[2] = XINT (tem
) + '0';
2420 #if defined (CSTOPB)
2421 attr
.c_cflag
&= ~CSTOPB
;
2422 if (XINT (tem
) == 2)
2423 attr
.c_cflag
|= CSTOPB
;
2425 /* Don't error on 1 stopbit, which should be set by cfmakeraw. */
2426 if (XINT (tem
) != 1)
2427 error ("Stopbits cannot be configured");
2429 childp2
= Fplist_put (childp2
, QCstopbits
, tem
);
2431 /* Configure flowcontrol. */
2432 if (!NILP (Fplist_member (contact
, QCflowcontrol
)))
2433 tem
= Fplist_get (contact
, QCflowcontrol
);
2435 tem
= Fplist_get (p
->childp
, QCflowcontrol
);
2436 if (!NILP (tem
) && !EQ (tem
, Qhw
) && !EQ (tem
, Qsw
))
2437 error (":flowcontrol must be nil (no flowcontrol), `hw', or `sw'");
2438 #if defined (CRTSCTS)
2439 attr
.c_cflag
&= ~CRTSCTS
;
2441 #if defined (CNEW_RTSCTS)
2442 attr
.c_cflag
&= ~CNEW_RTSCTS
;
2444 #if defined (IXON) && defined (IXOFF)
2445 attr
.c_iflag
&= ~(IXON
| IXOFF
);
2449 /* Already configured. */
2451 else if (EQ (tem
, Qhw
))
2453 #if defined (CRTSCTS)
2454 attr
.c_cflag
|= CRTSCTS
;
2455 #elif defined (CNEW_RTSCTS)
2456 attr
.c_cflag
|= CNEW_RTSCTS
;
2458 error ("Hardware flowcontrol (RTS/CTS) not supported");
2461 else if (EQ (tem
, Qsw
))
2463 #if defined (IXON) && defined (IXOFF)
2464 attr
.c_iflag
|= (IXON
| IXOFF
);
2466 error ("Software flowcontrol (XON/XOFF) not supported");
2469 childp2
= Fplist_put (childp2
, QCflowcontrol
, tem
);
2471 /* Activate configuration. */
2472 err
= tcsetattr (p
->outfd
, TCSANOW
, &attr
);
2474 error ("tcsetattr() failed: %s", emacs_strerror (errno
));
2476 childp2
= Fplist_put (childp2
, QCsummary
, build_string (summary
));
2477 p
->childp
= childp2
;
2480 #endif /* not DOS_NT */
2482 /* System depended enumeration of and access to system processes a-la ps(1). */
2486 /* Process enumeration and access via /proc. */
2489 list_system_processes (void)
2491 Lisp_Object procdir
, match
, proclist
, next
;
2492 struct gcpro gcpro1
, gcpro2
;
2493 register Lisp_Object tail
;
2495 GCPRO2 (procdir
, match
);
2496 /* For every process on the system, there's a directory in the
2497 "/proc" pseudo-directory whose name is the numeric ID of that
2499 procdir
= build_string ("/proc");
2500 match
= build_string ("[0-9]+");
2501 proclist
= directory_files_internal (procdir
, Qnil
, match
, Qt
, 0, Qnil
);
2503 /* `proclist' gives process IDs as strings. Destructively convert
2504 each string into a number. */
2505 for (tail
= proclist
; CONSP (tail
); tail
= next
)
2508 XSETCAR (tail
, Fstring_to_number (XCAR (tail
), Qnil
));
2512 /* directory_files_internal returns the files in reverse order; undo
2514 proclist
= Fnreverse (proclist
);
2518 #elif defined BSD_SYSTEM
2521 list_system_processes (void)
2523 #if defined DARWIN_OS || defined __NetBSD__ || defined __OpenBSD__
2524 int mib
[] = {CTL_KERN
, KERN_PROC
, KERN_PROC_ALL
};
2526 int mib
[] = {CTL_KERN
, KERN_PROC
, KERN_PROC_PROC
};
2529 struct kinfo_proc
*procs
;
2532 struct gcpro gcpro1
;
2533 Lisp_Object proclist
= Qnil
;
2535 if (sysctl (mib
, 3, NULL
, &len
, NULL
, 0) != 0)
2538 procs
= xmalloc (len
);
2539 if (sysctl (mib
, 3, procs
, &len
, NULL
, 0) != 0)
2546 len
/= sizeof (struct kinfo_proc
);
2547 for (i
= 0; i
< len
; i
++)
2549 #if defined DARWIN_OS || defined __NetBSD__
2550 proclist
= Fcons (make_fixnum_or_float (procs
[i
].kp_proc
.p_pid
), proclist
);
2551 #elif defined __OpenBSD__
2552 proclist
= Fcons (make_fixnum_or_float (procs
[i
].p_pid
), proclist
);
2554 proclist
= Fcons (make_fixnum_or_float (procs
[i
].ki_pid
), proclist
);
2564 /* The WINDOWSNT implementation is in w32.c.
2565 The MSDOS implementation is in dosfns.c. */
2566 #elif !defined (WINDOWSNT) && !defined (MSDOS)
2569 list_system_processes (void)
2574 #endif /* !defined (WINDOWSNT) */
2578 time_from_jiffies (unsigned long long tval
, long hz
)
2580 unsigned long long s
= tval
/ hz
;
2581 unsigned long long frac
= tval
% hz
;
2585 if (TYPE_MAXIMUM (time_t) < s
)
2587 if (LONG_MAX
- 1 <= ULLONG_MAX
/ EMACS_TIME_RESOLUTION
2588 || frac
<= ULLONG_MAX
/ EMACS_TIME_RESOLUTION
)
2589 ns
= frac
* EMACS_TIME_RESOLUTION
/ hz
;
2592 /* This is reachable only in the unlikely case that HZ * HZ
2593 exceeds ULLONG_MAX. It calculates an approximation that is
2594 guaranteed to be in range. */
2595 long hz_per_ns
= (hz
/ EMACS_TIME_RESOLUTION
2596 + (hz
% EMACS_TIME_RESOLUTION
!= 0));
2597 ns
= frac
/ hz_per_ns
;
2600 EMACS_SET_SECS_NSECS (t
, s
, ns
);
2605 ltime_from_jiffies (unsigned long long tval
, long hz
)
2607 EMACS_TIME t
= time_from_jiffies (tval
, hz
);
2608 return make_lisp_time (t
);
2617 EMACS_SET_SECS_NSECS (up
, 0, 0);
2620 fup
= fopen ("/proc/uptime", "r");
2624 unsigned long long upsec
, upfrac
, idlesec
, idlefrac
;
2625 int upfrac_start
, upfrac_end
, idlefrac_start
, idlefrac_end
;
2627 if (fscanf (fup
, "%llu.%n%llu%n %llu.%n%llu%n",
2628 &upsec
, &upfrac_start
, &upfrac
, &upfrac_end
,
2629 &idlesec
, &idlefrac_start
, &idlefrac
, &idlefrac_end
)
2632 if (TYPE_MAXIMUM (time_t) < upsec
)
2634 upsec
= TYPE_MAXIMUM (time_t);
2635 upfrac
= EMACS_TIME_RESOLUTION
- 1;
2639 int upfraclen
= upfrac_end
- upfrac_start
;
2640 for (; upfraclen
< LOG10_EMACS_TIME_RESOLUTION
; upfraclen
++)
2642 for (; LOG10_EMACS_TIME_RESOLUTION
< upfraclen
; upfraclen
--)
2644 upfrac
= min (upfrac
, EMACS_TIME_RESOLUTION
- 1);
2646 EMACS_SET_SECS_NSECS (up
, upsec
, upfrac
);
2655 #define MAJOR(d) (((unsigned)(d) >> 8) & 0xfff)
2656 #define MINOR(d) (((unsigned)(d) & 0xff) | (((unsigned)(d) & 0xfff00000) >> 12))
2659 procfs_ttyname (int rdev
)
2662 char name
[PATH_MAX
];
2665 fdev
= fopen ("/proc/tty/drivers", "r");
2670 unsigned long minor_beg
, minor_end
;
2671 char minor
[25]; /* 2 32-bit numbers + dash */
2674 while (!feof (fdev
) && !ferror (fdev
))
2676 if (3 <= fscanf (fdev
, "%*s %s %u %s %*s\n", name
, &major
, minor
)
2677 && major
== MAJOR (rdev
))
2679 minor_beg
= strtoul (minor
, &endp
, 0);
2681 minor_end
= minor_beg
;
2682 else if (*endp
== '-')
2683 minor_end
= strtoul (endp
+ 1, &endp
, 0);
2687 if (MINOR (rdev
) >= minor_beg
&& MINOR (rdev
) <= minor_end
)
2689 sprintf (name
+ strlen (name
), "%u", MINOR (rdev
));
2697 return build_string (name
);
2700 static unsigned long
2701 procfs_get_total_memory (void)
2704 unsigned long retval
= 2 * 1024 * 1024; /* default: 2GB */
2707 fmem
= fopen ("/proc/meminfo", "r");
2711 unsigned long entry_value
;
2712 char entry_name
[20]; /* the longest I saw is 13+1 */
2714 while (!feof (fmem
) && !ferror (fmem
))
2716 if (2 <= fscanf (fmem
, "%s %lu kB\n", entry_name
, &entry_value
)
2717 && strcmp (entry_name
, "MemTotal:") == 0)
2719 retval
= entry_value
;
2730 system_process_attributes (Lisp_Object pid
)
2732 char procfn
[PATH_MAX
], fn
[PATH_MAX
];
2736 long clocks_per_sec
;
2738 char procbuf
[1025], *p
, *q
;
2741 const char *cmd
= NULL
;
2742 char *cmdline
= NULL
;
2743 ptrdiff_t cmdsize
= 0, cmdline_size
;
2746 int ppid
, pgrp
, sess
, tty
, tpgid
, thcount
;
2749 unsigned long long u_time
, s_time
, cutime
, cstime
, start
;
2750 long priority
, niceness
, rss
;
2751 unsigned long minflt
, majflt
, cminflt
, cmajflt
, vsize
;
2752 EMACS_TIME tnow
, tstart
, tboot
, telapsed
, us_time
;
2754 Lisp_Object attrs
= Qnil
;
2755 Lisp_Object cmd_str
, decoded_cmd
, tem
;
2756 struct gcpro gcpro1
, gcpro2
;
2758 CHECK_NUMBER_OR_FLOAT (pid
);
2759 CONS_TO_INTEGER (pid
, pid_t
, proc_id
);
2760 sprintf (procfn
, "/proc/%"pMd
, proc_id
);
2761 if (stat (procfn
, &st
) < 0)
2764 GCPRO2 (attrs
, decoded_cmd
);
2768 attrs
= Fcons (Fcons (Qeuid
, make_fixnum_or_float (uid
)), attrs
);
2770 pw
= getpwuid (uid
);
2773 attrs
= Fcons (Fcons (Quser
, build_string (pw
->pw_name
)), attrs
);
2776 attrs
= Fcons (Fcons (Qegid
, make_fixnum_or_float (gid
)), attrs
);
2778 gr
= getgrgid (gid
);
2781 attrs
= Fcons (Fcons (Qgroup
, build_string (gr
->gr_name
)), attrs
);
2783 strcpy (fn
, procfn
);
2784 procfn_end
= fn
+ strlen (fn
);
2785 strcpy (procfn_end
, "/stat");
2786 fd
= emacs_open (fn
, O_RDONLY
, 0);
2787 if (fd
>= 0 && (nread
= emacs_read (fd
, procbuf
, sizeof (procbuf
) - 1)) > 0)
2789 procbuf
[nread
] = '\0';
2792 p
= strchr (p
, '(');
2795 q
= strrchr (p
+ 1, ')');
2810 /* Command name is encoded in locale-coding-system; decode it. */
2811 cmd_str
= make_unibyte_string (cmd
, cmdsize
);
2812 decoded_cmd
= code_convert_string_norecord (cmd_str
,
2813 Vlocale_coding_system
, 0);
2814 attrs
= Fcons (Fcons (Qcomm
, decoded_cmd
), attrs
);
2818 EMACS_INT ppid_eint
, pgrp_eint
, sess_eint
, tpgid_eint
, thcount_eint
;
2820 /* state ppid pgrp sess tty tpgid . minflt cminflt majflt cmajflt utime stime cutime cstime priority nice thcount . start vsize rss */
2821 sscanf (p
, "%c %d %d %d %d %d %*u %lu %lu %lu %lu %Lu %Lu %Lu %Lu %ld %ld %d %*d %Lu %lu %ld",
2822 &c
, &ppid
, &pgrp
, &sess
, &tty
, &tpgid
,
2823 &minflt
, &cminflt
, &majflt
, &cmajflt
,
2824 &u_time
, &s_time
, &cutime
, &cstime
,
2825 &priority
, &niceness
, &thcount
, &start
, &vsize
, &rss
);
2830 state_str
[1] = '\0';
2831 tem
= build_string (state_str
);
2832 attrs
= Fcons (Fcons (Qstate
, tem
), attrs
);
2834 /* Stops GCC whining about limited range of data type. */
2839 thcount_eint
= thcount
;
2840 attrs
= Fcons (Fcons (Qppid
, make_fixnum_or_float (ppid_eint
)), attrs
);
2841 attrs
= Fcons (Fcons (Qpgrp
, make_fixnum_or_float (pgrp_eint
)), attrs
);
2842 attrs
= Fcons (Fcons (Qsess
, make_fixnum_or_float (sess_eint
)), attrs
);
2843 attrs
= Fcons (Fcons (Qttname
, procfs_ttyname (tty
)), attrs
);
2844 attrs
= Fcons (Fcons (Qtpgid
, make_fixnum_or_float (tpgid_eint
)), attrs
);
2845 attrs
= Fcons (Fcons (Qminflt
, make_fixnum_or_float (minflt
)), attrs
);
2846 attrs
= Fcons (Fcons (Qmajflt
, make_fixnum_or_float (majflt
)), attrs
);
2847 attrs
= Fcons (Fcons (Qcminflt
, make_fixnum_or_float (cminflt
)), attrs
);
2848 attrs
= Fcons (Fcons (Qcmajflt
, make_fixnum_or_float (cmajflt
)), attrs
);
2849 clocks_per_sec
= sysconf (_SC_CLK_TCK
);
2850 if (clocks_per_sec
< 0)
2851 clocks_per_sec
= 100;
2852 attrs
= Fcons (Fcons (Qutime
,
2853 ltime_from_jiffies (u_time
, clocks_per_sec
)),
2855 attrs
= Fcons (Fcons (Qstime
,
2856 ltime_from_jiffies (s_time
, clocks_per_sec
)),
2858 attrs
= Fcons (Fcons (Qtime
,
2859 ltime_from_jiffies (s_time
+ u_time
,
2862 attrs
= Fcons (Fcons (Qcutime
,
2863 ltime_from_jiffies (cutime
, clocks_per_sec
)),
2865 attrs
= Fcons (Fcons (Qcstime
,
2866 ltime_from_jiffies (cstime
, clocks_per_sec
)),
2868 attrs
= Fcons (Fcons (Qctime
,
2869 ltime_from_jiffies (cstime
+cutime
, clocks_per_sec
)),
2871 attrs
= Fcons (Fcons (Qpri
, make_number (priority
)), attrs
);
2872 attrs
= Fcons (Fcons (Qnice
, make_number (niceness
)), attrs
);
2873 attrs
= Fcons (Fcons (Qthcount
, make_fixnum_or_float (thcount_eint
)), attrs
);
2874 EMACS_GET_TIME (tnow
);
2875 telapsed
= get_up_time ();
2876 EMACS_SUB_TIME (tboot
, tnow
, telapsed
);
2877 tstart
= time_from_jiffies (start
, clocks_per_sec
);
2878 EMACS_ADD_TIME (tstart
, tboot
, tstart
);
2879 attrs
= Fcons (Fcons (Qstart
, make_lisp_time (tstart
)), attrs
);
2880 attrs
= Fcons (Fcons (Qvsize
, make_fixnum_or_float (vsize
/1024)), attrs
);
2881 attrs
= Fcons (Fcons (Qrss
, make_fixnum_or_float (4*rss
)), attrs
);
2882 EMACS_SUB_TIME (telapsed
, tnow
, tstart
);
2883 attrs
= Fcons (Fcons (Qetime
, make_lisp_time (telapsed
)), attrs
);
2884 us_time
= time_from_jiffies (u_time
+ s_time
, clocks_per_sec
);
2885 pcpu
= (EMACS_TIME_TO_DOUBLE (us_time
)
2886 / EMACS_TIME_TO_DOUBLE (telapsed
));
2889 attrs
= Fcons (Fcons (Qpcpu
, make_float (100 * pcpu
)), attrs
);
2890 pmem
= 4.0 * 100 * rss
/ procfs_get_total_memory ();
2893 attrs
= Fcons (Fcons (Qpmem
, make_float (pmem
)), attrs
);
2900 strcpy (procfn_end
, "/cmdline");
2901 fd
= emacs_open (fn
, O_RDONLY
, 0);
2905 for (cmdline_size
= 0; cmdline_size
< STRING_BYTES_BOUND
; cmdline_size
++)
2907 if (emacs_read (fd
, &ch
, 1) != 1)
2910 if (isspace (c
) || c
== '\\')
2911 cmdline_size
++; /* for later quoting, see below */
2915 cmdline
= xmalloc (cmdline_size
+ 1);
2916 lseek (fd
, 0L, SEEK_SET
);
2918 if ((nread
= read (fd
, cmdline
, cmdline_size
)) >= 0)
2919 cmdline
[nread
++] = '\0';
2922 /* Assigning zero to `nread' makes us skip the following
2923 two loops, assign zero to cmdline_size, and enter the
2924 following `if' clause that handles unknown command
2928 /* We don't want trailing null characters. */
2929 for (p
= cmdline
+ nread
; p
> cmdline
+ 1 && !p
[-1]; p
--)
2931 for (p
= cmdline
; p
< cmdline
+ nread
; p
++)
2933 /* Escape-quote whitespace and backslashes. */
2934 if (isspace (*p
) || *p
== '\\')
2936 memmove (p
+ 1, p
, nread
- (p
- cmdline
));
2940 else if (*p
== '\0')
2943 cmdline_size
= nread
;
2950 cmdsize
= strlen (cmd
);
2951 cmdline_size
= cmdsize
+ 2;
2952 cmdline
= xmalloc (cmdline_size
+ 1);
2953 strcpy (cmdline
, "[");
2954 strcat (strncat (cmdline
, cmd
, cmdsize
), "]");
2957 /* Command line is encoded in locale-coding-system; decode it. */
2958 cmd_str
= make_unibyte_string (cmdline
, cmdline_size
);
2959 decoded_cmd
= code_convert_string_norecord (cmd_str
,
2960 Vlocale_coding_system
, 0);
2962 attrs
= Fcons (Fcons (Qargs
, decoded_cmd
), attrs
);
2969 #elif defined (SOLARIS2) && defined (HAVE_PROCFS)
2971 /* The <procfs.h> header does not like to be included if _LP64 is defined and
2972 __FILE_OFFSET_BITS == 64. This is an ugly workaround that. */
2973 #if !defined (_LP64) && defined (_FILE_OFFSET_BITS) && (_FILE_OFFSET_BITS == 64)
2974 #define PROCFS_FILE_OFFSET_BITS_HACK 1
2975 #undef _FILE_OFFSET_BITS
2977 #define PROCFS_FILE_OFFSET_BITS_HACK 0
2982 #if PROCFS_FILE_OFFSET_BITS_HACK == 1
2983 #define _FILE_OFFSET_BITS 64
2984 #ifdef _FILE_OFFSET_BITS /* Avoid unused-macro warnings. */
2986 #endif /* PROCFS_FILE_OFFSET_BITS_HACK == 1 */
2989 system_process_attributes (Lisp_Object pid
)
2991 char procfn
[PATH_MAX
], fn
[PATH_MAX
];
2996 struct psinfo pinfo
;
3002 Lisp_Object attrs
= Qnil
;
3003 Lisp_Object decoded_cmd
, tem
;
3004 struct gcpro gcpro1
, gcpro2
;
3006 CHECK_NUMBER_OR_FLOAT (pid
);
3007 CONS_TO_INTEGER (pid
, pid_t
, proc_id
);
3008 sprintf (procfn
, "/proc/%"pMd
, proc_id
);
3009 if (stat (procfn
, &st
) < 0)
3012 GCPRO2 (attrs
, decoded_cmd
);
3016 attrs
= Fcons (Fcons (Qeuid
, make_fixnum_or_float (uid
)), attrs
);
3018 pw
= getpwuid (uid
);
3021 attrs
= Fcons (Fcons (Quser
, build_string (pw
->pw_name
)), attrs
);
3024 attrs
= Fcons (Fcons (Qegid
, make_fixnum_or_float (gid
)), attrs
);
3026 gr
= getgrgid (gid
);
3029 attrs
= Fcons (Fcons (Qgroup
, build_string (gr
->gr_name
)), attrs
);
3031 strcpy (fn
, procfn
);
3032 procfn_end
= fn
+ strlen (fn
);
3033 strcpy (procfn_end
, "/psinfo");
3034 fd
= emacs_open (fn
, O_RDONLY
, 0);
3036 && (nread
= read (fd
, (char*)&pinfo
, sizeof (struct psinfo
)) > 0))
3038 attrs
= Fcons (Fcons (Qppid
, make_fixnum_or_float (pinfo
.pr_ppid
)), attrs
);
3039 attrs
= Fcons (Fcons (Qpgrp
, make_fixnum_or_float (pinfo
.pr_pgid
)), attrs
);
3040 attrs
= Fcons (Fcons (Qsess
, make_fixnum_or_float (pinfo
.pr_sid
)), attrs
);
3044 state_str
[0] = pinfo
.pr_lwp
.pr_sname
;
3045 state_str
[1] = '\0';
3046 tem
= build_string (state_str
);
3047 attrs
= Fcons (Fcons (Qstate
, tem
), attrs
);
3050 /* FIXME: missing Qttyname. psinfo.pr_ttydev is a dev_t,
3051 need to get a string from it. */
3053 /* FIXME: missing: Qtpgid */
3065 Are they available? */
3067 attrs
= Fcons (Fcons (Qtime
, make_lisp_time (pinfo
.pr_time
)), attrs
);
3068 attrs
= Fcons (Fcons (Qctime
, make_lisp_time (pinfo
.pr_ctime
)), attrs
);
3069 attrs
= Fcons (Fcons (Qpri
, make_number (pinfo
.pr_lwp
.pr_pri
)), attrs
);
3070 attrs
= Fcons (Fcons (Qnice
, make_number (pinfo
.pr_lwp
.pr_nice
)), attrs
);
3071 attrs
= Fcons (Fcons (Qthcount
, make_fixnum_or_float (pinfo
.pr_nlwp
)), attrs
);
3073 attrs
= Fcons (Fcons (Qstart
, make_lisp_time (pinfo
.pr_start
)), attrs
);
3074 attrs
= Fcons (Fcons (Qvsize
, make_fixnum_or_float (pinfo
.pr_size
)), attrs
);
3075 attrs
= Fcons (Fcons (Qrss
, make_fixnum_or_float (pinfo
.pr_rssize
)), attrs
);
3077 /* pr_pctcpu and pr_pctmem are unsigned integers in the
3078 range 0 .. 2**15, representing 0.0 .. 1.0. */
3079 attrs
= Fcons (Fcons (Qpcpu
, make_float (100.0 / 0x8000 * pinfo
.pr_pctcpu
)), attrs
);
3080 attrs
= Fcons (Fcons (Qpmem
, make_float (100.0 / 0x8000 * pinfo
.pr_pctmem
)), attrs
);
3083 = code_convert_string_norecord (make_unibyte_string (pinfo
.pr_fname
,
3084 strlen (pinfo
.pr_fname
)),
3085 Vlocale_coding_system
, 0);
3086 attrs
= Fcons (Fcons (Qcomm
, decoded_cmd
), attrs
);
3088 = code_convert_string_norecord (make_unibyte_string (pinfo
.pr_psargs
,
3089 strlen (pinfo
.pr_psargs
)),
3090 Vlocale_coding_system
, 0);
3091 attrs
= Fcons (Fcons (Qargs
, decoded_cmd
), attrs
);
3101 #elif defined __FreeBSD__
3104 timeval_to_EMACS_TIME (struct timeval t
)
3107 EMACS_SET_SECS_NSECS (e
, t
.tv_sec
, t
.tv_usec
* 1000);
3112 make_lisp_timeval (struct timeval t
)
3114 return make_lisp_time (timeval_to_EMACS_TIME (t
));
3118 system_process_attributes (Lisp_Object pid
)
3121 int pagesize
= getpagesize ();
3128 char args
[MAXPATHLEN
];
3131 int mib
[4] = {CTL_KERN
, KERN_PROC
, KERN_PROC_PID
};
3132 struct kinfo_proc proc
;
3133 size_t proclen
= sizeof proc
;
3135 struct gcpro gcpro1
, gcpro2
;
3136 Lisp_Object attrs
= Qnil
;
3137 Lisp_Object decoded_comm
;
3139 CHECK_NUMBER_OR_FLOAT (pid
);
3140 CONS_TO_INTEGER (pid
, int, proc_id
);
3143 if (sysctl (mib
, 4, &proc
, &proclen
, NULL
, 0) != 0)
3146 GCPRO2 (attrs
, decoded_comm
);
3148 attrs
= Fcons (Fcons (Qeuid
, make_fixnum_or_float (proc
.ki_uid
)), attrs
);
3151 pw
= getpwuid (proc
.ki_uid
);
3154 attrs
= Fcons (Fcons (Quser
, build_string (pw
->pw_name
)), attrs
);
3156 attrs
= Fcons (Fcons (Qegid
, make_fixnum_or_float (proc
.ki_svgid
)), attrs
);
3159 gr
= getgrgid (proc
.ki_svgid
);
3162 attrs
= Fcons (Fcons (Qgroup
, build_string (gr
->gr_name
)), attrs
);
3164 decoded_comm
= code_convert_string_norecord
3165 (make_unibyte_string (proc
.ki_comm
, strlen (proc
.ki_comm
)),
3166 Vlocale_coding_system
, 0);
3168 attrs
= Fcons (Fcons (Qcomm
, decoded_comm
), attrs
);
3170 char state
[2] = {'\0', '\0'};
3171 switch (proc
.ki_stat
)
3193 attrs
= Fcons (Fcons (Qstate
, build_string (state
)), attrs
);
3196 attrs
= Fcons (Fcons (Qppid
, make_fixnum_or_float (proc
.ki_ppid
)), attrs
);
3197 attrs
= Fcons (Fcons (Qpgrp
, make_fixnum_or_float (proc
.ki_pgid
)), attrs
);
3198 attrs
= Fcons (Fcons (Qsess
, make_fixnum_or_float (proc
.ki_sid
)), attrs
);
3201 ttyname
= proc
.ki_tdev
== NODEV
? NULL
: devname (proc
.ki_tdev
, S_IFCHR
);
3204 attrs
= Fcons (Fcons (Qtty
, build_string (ttyname
)), attrs
);
3206 attrs
= Fcons (Fcons (Qtpgid
, make_fixnum_or_float (proc
.ki_tpgid
)), attrs
);
3207 attrs
= Fcons (Fcons (Qminflt
, make_fixnum_or_float (proc
.ki_rusage
.ru_minflt
)), attrs
);
3208 attrs
= Fcons (Fcons (Qmajflt
, make_fixnum_or_float (proc
.ki_rusage
.ru_majflt
)), attrs
);
3209 attrs
= Fcons (Fcons (Qcminflt
, make_number (proc
.ki_rusage_ch
.ru_minflt
)), attrs
);
3210 attrs
= Fcons (Fcons (Qcmajflt
, make_number (proc
.ki_rusage_ch
.ru_majflt
)), attrs
);
3212 attrs
= Fcons (Fcons (Qutime
, make_lisp_timeval (proc
.ki_rusage
.ru_utime
)),
3214 attrs
= Fcons (Fcons (Qstime
, make_lisp_timeval (proc
.ki_rusage
.ru_stime
)),
3217 timeval_to_EMACS_TIME (proc
.ki_rusage
.ru_utime
),
3218 timeval_to_EMACS_TIME (proc
.ki_rusage
.ru_stime
));
3219 attrs
= Fcons (Fcons (Qtime
, make_lisp_time (t
)), attrs
);
3221 attrs
= Fcons (Fcons (Qcutime
,
3222 make_lisp_timeval (proc
.ki_rusage_ch
.ru_utime
)),
3224 attrs
= Fcons (Fcons (Qcstime
,
3225 make_lisp_timeval (proc
.ki_rusage_ch
.ru_utime
)),
3228 timeval_to_EMACS_TIME (proc
.ki_rusage_ch
.ru_utime
),
3229 timeval_to_EMACS_TIME (proc
.ki_rusage_ch
.ru_stime
));
3230 attrs
= Fcons (Fcons (Qctime
, make_lisp_time (t
)), attrs
);
3232 attrs
= Fcons (Fcons (Qthcount
, make_fixnum_or_float (proc
.ki_numthreads
)),
3234 attrs
= Fcons (Fcons (Qpri
, make_number (proc
.ki_pri
.pri_native
)), attrs
);
3235 attrs
= Fcons (Fcons (Qnice
, make_number (proc
.ki_nice
)), attrs
);
3236 attrs
= Fcons (Fcons (Qstart
, make_lisp_timeval (proc
.ki_start
)), attrs
);
3237 attrs
= Fcons (Fcons (Qvsize
, make_number (proc
.ki_size
>> 10)), attrs
);
3238 attrs
= Fcons (Fcons (Qrss
, make_number (proc
.ki_rssize
* pagesize
>> 10)),
3241 EMACS_GET_TIME (now
);
3242 EMACS_SUB_TIME (t
, now
, timeval_to_EMACS_TIME (proc
.ki_start
));
3243 attrs
= Fcons (Fcons (Qetime
, make_lisp_time (t
)), attrs
);
3245 len
= sizeof fscale
;
3246 if (sysctlbyname ("kern.fscale", &fscale
, &len
, NULL
, 0) == 0)
3251 if (sysctlbyname ("kern.ccpu", &ccpu
, &len
, NULL
, 0) == 0)
3253 pcpu
= (100.0 * proc
.ki_pctcpu
/ fscale
3254 / (1 - exp (proc
.ki_swtime
* log ((double) ccpu
/ fscale
))));
3255 attrs
= Fcons (Fcons (Qpcpu
, make_fixnum_or_float (pcpu
)), attrs
);
3259 len
= sizeof npages
;
3260 if (sysctlbyname ("hw.availpages", &npages
, &len
, NULL
, 0) == 0)
3262 double pmem
= (proc
.ki_flag
& P_INMEM
3263 ? 100.0 * proc
.ki_rssize
/ npages
3265 attrs
= Fcons (Fcons (Qpmem
, make_fixnum_or_float (pmem
)), attrs
);
3268 mib
[2] = KERN_PROC_ARGS
;
3270 if (sysctl (mib
, 4, args
, &len
, NULL
, 0) == 0)
3273 for (i
= 0; i
< len
; i
++)
3275 if (! args
[i
] && i
< len
- 1)
3280 (code_convert_string_norecord
3281 (make_unibyte_string (args
, strlen (args
)),
3282 Vlocale_coding_system
, 0));
3284 attrs
= Fcons (Fcons (Qargs
, decoded_comm
), attrs
);
3291 /* The WINDOWSNT implementation is in w32.c.
3292 The MSDOS implementation is in dosfns.c. */
3293 #elif !defined (WINDOWSNT) && !defined (MSDOS)
3296 system_process_attributes (Lisp_Object pid
)
3301 #endif /* !defined (WINDOWSNT) */