src/gnutls.c: Doc fixes. Make some functions static.
[emacs.git] / src / sysdep.c
blobe7d35d46bf704339218ca1f4a5b6ca4aead78706
1 /* Interfaces to system-dependent kernel and library entries.
2 Copyright (C) 1985, 1986, 1987, 1988, 1993, 1994, 1995, 1999, 2000, 2001,
3 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
4 Free Software Foundation, Inc.
6 This file is part of GNU Emacs.
8 GNU Emacs is free software: you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation, either version 3 of the License, or
11 (at your option) any later version.
13 GNU Emacs is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
21 #include <config.h>
22 #include <ctype.h>
23 #include <signal.h>
24 #include <stdio.h>
25 #include <setjmp.h>
26 #ifdef HAVE_PWD_H
27 #include <pwd.h>
28 #include <grp.h>
29 #endif /* HAVE_PWD_H */
30 #ifdef HAVE_LIMITS_H
31 #include <limits.h>
32 #endif /* HAVE_LIMITS_H */
33 #ifdef HAVE_UNISTD_H
34 #include <unistd.h>
35 #endif
37 #include "lisp.h"
38 #include "sysselect.h"
39 #include "blockinput.h"
41 #ifdef WINDOWSNT
42 #define read sys_read
43 #define write sys_write
44 #include <windows.h>
45 #ifndef NULL
46 #define NULL 0
47 #endif
48 #endif /* not WINDOWSNT */
50 #include <sys/types.h>
51 #include <sys/stat.h>
52 #include <errno.h>
54 #ifdef HAVE_SETPGID
55 #if !defined (USG)
56 #undef setpgrp
57 #define setpgrp setpgid
58 #endif
59 #endif
61 /* Get SI_SRPC_DOMAIN, if it is available. */
62 #ifdef HAVE_SYS_SYSTEMINFO_H
63 #include <sys/systeminfo.h>
64 #endif
66 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida, MW Aug 1993 */
67 #include <dos.h>
68 #include "dosfns.h"
69 #include "msdos.h"
70 #include <sys/param.h>
71 #endif
73 #include <sys/file.h>
75 #ifdef HAVE_FCNTL_H
76 #include <fcntl.h>
77 #endif
79 #include "systty.h"
80 #include "syswait.h"
82 #ifdef HAVE_SYS_UTSNAME_H
83 #include <sys/utsname.h>
84 #include <memory.h>
85 #endif /* HAVE_SYS_UTSNAME_H */
87 #include "keyboard.h"
88 #include "frame.h"
89 #include "window.h"
90 #include "termhooks.h"
91 #include "termchar.h"
92 #include "termopts.h"
93 #include "dispextern.h"
94 #include "process.h"
95 #include "cm.h" /* for reset_sys_modes */
96 #ifdef HAVE_TERM_H
97 /* Include this last. If it is ncurses header file, it adds a lot of
98 defines that interfere with stuff in other headers. Someone responsible
99 for ncurses messed up bigtime. See bug#6812. */
100 #include <term.h>
101 #endif
103 #ifdef WINDOWSNT
104 #include <direct.h>
105 /* In process.h which conflicts with the local copy. */
106 #define _P_WAIT 0
107 int _cdecl _spawnlp (int, const char *, const char *, ...);
108 int _cdecl _getpid (void);
109 extern char *getwd (char *);
110 #endif
112 #include "syssignal.h"
113 #include "systime.h"
114 #ifdef HAVE_UTIME_H
115 #include <utime.h>
116 #endif
118 #ifndef HAVE_UTIMES
119 #ifndef HAVE_STRUCT_UTIMBUF
120 /* We want to use utime rather than utimes, but we couldn't find the
121 structure declaration. We'll use the traditional one. */
122 struct utimbuf {
123 long actime;
124 long modtime;
126 #endif
127 #endif
129 /* LPASS8 is new in 4.3, and makes cbreak mode provide all 8 bits. */
130 #ifndef LPASS8
131 #define LPASS8 0
132 #endif
134 static const int baud_convert[] =
136 0, 50, 75, 110, 135, 150, 200, 300, 600, 1200,
137 1800, 2400, 4800, 9600, 19200, 38400
140 int emacs_ospeed;
142 void croak (char *) NO_RETURN;
144 /* Temporary used by `sigblock' when defined in terms of signprocmask. */
146 SIGMASKTYPE sigprocmask_set;
149 #if !defined (HAVE_GET_CURRENT_DIR_NAME) || defined (BROKEN_GET_CURRENT_DIR_NAME)
151 /* Return the current working directory. Returns NULL on errors.
152 Any other returned value must be freed with free. This is used
153 only when get_current_dir_name is not defined on the system. */
154 char*
155 get_current_dir_name (void)
157 char *buf;
158 char *pwd;
159 struct stat dotstat, pwdstat;
160 /* If PWD is accurate, use it instead of calling getwd. PWD is
161 sometimes a nicer name, and using it may avoid a fatal error if a
162 parent directory is searchable but not readable. */
163 if ((pwd = getenv ("PWD")) != 0
164 && (IS_DIRECTORY_SEP (*pwd) || (*pwd && IS_DEVICE_SEP (pwd[1])))
165 && stat (pwd, &pwdstat) == 0
166 && stat (".", &dotstat) == 0
167 && dotstat.st_ino == pwdstat.st_ino
168 && dotstat.st_dev == pwdstat.st_dev
169 #ifdef MAXPATHLEN
170 && strlen (pwd) < MAXPATHLEN
171 #endif
174 buf = (char *) malloc (strlen (pwd) + 1);
175 if (!buf)
176 return NULL;
177 strcpy (buf, pwd);
179 #ifdef HAVE_GETCWD
180 else
182 size_t buf_size = 1024;
183 buf = (char *) malloc (buf_size);
184 if (!buf)
185 return NULL;
186 for (;;)
188 if (getcwd (buf, buf_size) == buf)
189 break;
190 if (errno != ERANGE)
192 int tmp_errno = errno;
193 free (buf);
194 errno = tmp_errno;
195 return NULL;
197 buf_size *= 2;
198 buf = (char *) realloc (buf, buf_size);
199 if (!buf)
200 return NULL;
203 #else
204 else
206 /* We need MAXPATHLEN here. */
207 buf = (char *) malloc (MAXPATHLEN + 1);
208 if (!buf)
209 return NULL;
210 if (getwd (buf) == NULL)
212 int tmp_errno = errno;
213 free (buf);
214 errno = tmp_errno;
215 return NULL;
218 #endif
219 return buf;
221 #endif
224 /* Discard pending input on all input descriptors. */
226 void
227 discard_tty_input (void)
229 #ifndef WINDOWSNT
230 struct emacs_tty buf;
232 if (noninteractive)
233 return;
235 #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */
236 while (dos_keyread () != -1)
238 #else /* not MSDOS */
240 struct tty_display_info *tty;
241 for (tty = tty_list; tty; tty = tty->next)
243 if (tty->input) /* Is the device suspended? */
245 EMACS_GET_TTY (fileno (tty->input), &buf);
246 EMACS_SET_TTY (fileno (tty->input), &buf, 0);
250 #endif /* not MSDOS */
251 #endif /* not WINDOWSNT */
255 #ifdef SIGTSTP
257 /* Arrange for character C to be read as the next input from
258 the terminal.
259 XXX What if we have multiple ttys?
262 void
263 stuff_char (char c)
265 if (! FRAME_TERMCAP_P (SELECTED_FRAME ()))
266 return;
268 /* Should perhaps error if in batch mode */
269 #ifdef TIOCSTI
270 ioctl (fileno (CURTTY()->input), TIOCSTI, &c);
271 #else /* no TIOCSTI */
272 error ("Cannot stuff terminal input characters in this version of Unix");
273 #endif /* no TIOCSTI */
276 #endif /* SIGTSTP */
278 void
279 init_baud_rate (int fd)
281 if (noninteractive)
282 emacs_ospeed = 0;
283 else
285 #ifdef DOS_NT
286 emacs_ospeed = 15;
287 #else /* not DOS_NT */
288 struct termios sg;
290 sg.c_cflag = B9600;
291 tcgetattr (fd, &sg);
292 emacs_ospeed = cfgetospeed (&sg);
293 #endif /* not DOS_NT */
296 baud_rate = (emacs_ospeed < sizeof baud_convert / sizeof baud_convert[0]
297 ? baud_convert[emacs_ospeed] : 9600);
298 if (baud_rate == 0)
299 baud_rate = 1200;
303 /*ARGSUSED*/
304 void
305 set_exclusive_use (int fd)
307 #ifdef FIOCLEX
308 ioctl (fd, FIOCLEX, 0);
309 #endif
310 /* Ok to do nothing if this feature does not exist */
314 int wait_debugging; /* Set nonzero to make following function work under dbx
315 (at least for bsd). */
317 SIGTYPE
318 wait_for_termination_signal (void)
321 #ifndef MSDOS
322 /* Wait for subprocess with process id `pid' to terminate and
323 make sure it will get eliminated (not remain forever as a zombie) */
325 void
326 wait_for_termination (int pid)
328 while (1)
330 #if defined (BSD_SYSTEM) || defined (HPUX)
331 /* Note that kill returns -1 even if the process is just a zombie now.
332 But inevitably a SIGCHLD interrupt should be generated
333 and child_sig will do wait3 and make the process go away. */
334 /* There is some indication that there is a bug involved with
335 termination of subprocesses, perhaps involving a kernel bug too,
336 but no idea what it is. Just as a hunch we signal SIGCHLD to see
337 if that causes the problem to go away or get worse. */
338 sigsetmask (sigmask (SIGCHLD));
339 if (0 > kill (pid, 0))
341 sigsetmask (SIGEMPTYMASK);
342 kill (getpid (), SIGCHLD);
343 break;
345 if (wait_debugging)
346 sleep (1);
347 else
348 sigpause (SIGEMPTYMASK);
349 #else /* not BSD_SYSTEM, and not HPUX version >= 6 */
350 #ifdef WINDOWSNT
351 wait (0);
352 break;
353 #else /* not WINDOWSNT */
354 sigblock (sigmask (SIGCHLD));
355 errno = 0;
356 if (kill (pid, 0) == -1 && errno == ESRCH)
358 sigunblock (sigmask (SIGCHLD));
359 break;
362 sigsuspend (&empty_mask);
363 #endif /* not WINDOWSNT */
364 #endif /* not BSD_SYSTEM, and not HPUX version >= 6 */
369 * flush any pending output
370 * (may flush input as well; it does not matter the way we use it)
373 void
374 flush_pending_output (int channel)
376 #ifndef DOS_NT
377 /* If we try this, we get hit with SIGTTIN, because
378 the child's tty belongs to the child's pgrp. */
379 #else
380 #ifdef TCFLSH
381 ioctl (channel, TCFLSH, 1);
382 #else
383 #ifdef TIOCFLUSH
384 int zero = 0;
385 /* 3rd arg should be ignored
386 but some 4.2 kernels actually want the address of an int
387 and nonzero means something different. */
388 ioctl (channel, TIOCFLUSH, &zero);
389 #endif
390 #endif
391 #endif
394 /* Set up the terminal at the other end of a pseudo-terminal that
395 we will be controlling an inferior through.
396 It should not echo or do line-editing, since that is done
397 in Emacs. No padding needed for insertion into an Emacs buffer. */
399 void
400 child_setup_tty (int out)
402 #ifndef WINDOWSNT
403 struct emacs_tty s;
405 EMACS_GET_TTY (out, &s);
406 s.main.c_oflag |= OPOST; /* Enable output postprocessing */
407 s.main.c_oflag &= ~ONLCR; /* Disable map of NL to CR-NL on output */
408 #ifdef NLDLY
409 /* http://lists.gnu.org/archive/html/emacs-devel/2008-05/msg00406.html
410 Some versions of GNU Hurd do not have FFDLY? */
411 #ifdef FFDLY
412 s.main.c_oflag &= ~(NLDLY|CRDLY|TABDLY|BSDLY|VTDLY|FFDLY);
413 /* No output delays */
414 #else
415 s.main.c_oflag &= ~(NLDLY|CRDLY|TABDLY|BSDLY|VTDLY);
416 /* No output delays */
417 #endif
418 #endif
419 s.main.c_lflag &= ~ECHO; /* Disable echo */
420 s.main.c_lflag |= ISIG; /* Enable signals */
421 #ifdef IUCLC
422 s.main.c_iflag &= ~IUCLC; /* Disable downcasing on input. */
423 #endif
424 #ifdef ISTRIP
425 s.main.c_iflag &= ~ISTRIP; /* don't strip 8th bit on input */
426 #endif
427 #ifdef OLCUC
428 s.main.c_oflag &= ~OLCUC; /* Disable upcasing on output. */
429 #endif
430 s.main.c_oflag &= ~TAB3; /* Disable tab expansion */
431 s.main.c_cflag = (s.main.c_cflag & ~CSIZE) | CS8; /* Don't strip 8th bit */
432 s.main.c_cc[VERASE] = CDISABLE; /* disable erase processing */
433 s.main.c_cc[VKILL] = CDISABLE; /* disable kill processing */
435 #ifdef HPUX
436 s.main.c_cflag = (s.main.c_cflag & ~CBAUD) | B9600; /* baud rate sanity */
437 #endif /* HPUX */
439 #ifdef SIGNALS_VIA_CHARACTERS
440 /* the QUIT and INTR character are used in process_send_signal
441 so set them here to something useful. */
442 if (s.main.c_cc[VQUIT] == CDISABLE)
443 s.main.c_cc[VQUIT] = '\\'&037; /* Control-\ */
444 if (s.main.c_cc[VINTR] == CDISABLE)
445 s.main.c_cc[VINTR] = 'C'&037; /* Control-C */
446 #endif /* not SIGNALS_VIA_CHARACTERS */
448 #ifdef AIX
449 /* Also, PTY overloads NUL and BREAK.
450 don't ignore break, but don't signal either, so it looks like NUL. */
451 s.main.c_iflag &= ~IGNBRK;
452 s.main.c_iflag &= ~BRKINT;
453 /* rms: Formerly it set s.main.c_cc[VINTR] to 0377 here
454 unconditionally. Then a SIGNALS_VIA_CHARACTERS conditional
455 would force it to 0377. That looks like duplicated code. */
456 s.main.c_cflag = (s.main.c_cflag & ~CBAUD) | B9600; /* baud rate sanity */
457 #endif /* AIX */
459 /* We originally enabled ICANON (and set VEOF to 04), and then had
460 proces.c send additional EOF chars to flush the output when faced
461 with long lines, but this leads to weird effects when the
462 subprocess has disabled ICANON and ends up seeing those spurious
463 extra EOFs. So we don't send EOFs any more in
464 process.c:send_process. First we tried to disable ICANON by
465 default, so if a subsprocess sets up ICANON, it's his problem (or
466 the Elisp package that talks to it) to deal with lines that are
467 too long. But this disables some features, such as the ability
468 to send EOF signals. So we re-enabled ICANON but there is no
469 more "send eof to flush" going on (which is wrong and unportable
470 in itself). The correct way to handle too much output is to
471 buffer what could not be written and then write it again when
472 select returns ok for writing. This has it own set of
473 problems. Write is now asynchronous, is that a problem? How much
474 do we buffer, and what do we do when that limit is reached? */
476 s.main.c_lflag |= ICANON; /* Enable line editing and eof processing */
477 s.main.c_cc[VEOF] = 'D'&037; /* Control-D */
478 #if 0 /* These settings only apply to non-ICANON mode. */
479 s.main.c_cc[VMIN] = 1;
480 s.main.c_cc[VTIME] = 0;
481 #endif
483 EMACS_SET_TTY (out, &s, 0);
484 #endif /* not WINDOWSNT */
486 #endif /* MSDOS */
489 /* Record a signal code and the handler for it. */
490 struct save_signal
492 int code;
493 SIGTYPE (*handler) (int);
496 static void save_signal_handlers (struct save_signal *);
497 static void restore_signal_handlers (struct save_signal *);
499 /* Suspend the Emacs process; give terminal to its superior. */
501 void
502 sys_suspend (void)
504 #if defined (SIGTSTP) && !defined (MSDOS)
507 int pgrp = EMACS_GETPGRP (0);
508 EMACS_KILLPG (pgrp, SIGTSTP);
511 #else /* No SIGTSTP */
512 /* On a system where suspending is not implemented,
513 instead fork a subshell and let it talk directly to the terminal
514 while we wait. */
515 sys_subshell ();
517 #endif /* no SIGTSTP */
520 /* Fork a subshell. */
522 void
523 sys_subshell (void)
525 #ifdef DOS_NT /* Demacs 1.1.2 91/10/20 Manabu Higashida */
526 int st;
527 char oldwd[MAXPATHLEN+1]; /* Fixed length is safe on MSDOS. */
528 #endif
529 int pid;
530 struct save_signal saved_handlers[5];
531 Lisp_Object dir;
532 unsigned char *str = 0;
533 int len;
535 saved_handlers[0].code = SIGINT;
536 saved_handlers[1].code = SIGQUIT;
537 saved_handlers[2].code = SIGTERM;
538 #ifdef SIGIO
539 saved_handlers[3].code = SIGIO;
540 saved_handlers[4].code = 0;
541 #else
542 saved_handlers[3].code = 0;
543 #endif
545 /* Mentioning current_buffer->buffer would mean including buffer.h,
546 which somehow wedges the hp compiler. So instead... */
548 dir = intern ("default-directory");
549 if (NILP (Fboundp (dir)))
550 goto xyzzy;
551 dir = Fsymbol_value (dir);
552 if (!STRINGP (dir))
553 goto xyzzy;
555 dir = expand_and_dir_to_file (Funhandled_file_name_directory (dir), Qnil);
556 str = (unsigned char *) alloca (SCHARS (dir) + 2);
557 len = SCHARS (dir);
558 memcpy (str, SDATA (dir), len);
559 if (str[len - 1] != '/') str[len++] = '/';
560 str[len] = 0;
561 xyzzy:
563 #ifdef DOS_NT
564 pid = 0;
565 save_signal_handlers (saved_handlers);
566 synch_process_alive = 1;
567 #else
568 pid = vfork ();
569 if (pid == -1)
570 error ("Can't spawn subshell");
571 #endif
573 if (pid == 0)
575 const char *sh = 0;
577 #ifdef DOS_NT /* MW, Aug 1993 */
578 getwd (oldwd);
579 if (sh == 0)
580 sh = (char *) egetenv ("SUSPEND"); /* KFS, 1994-12-14 */
581 #endif
582 if (sh == 0)
583 sh = (char *) egetenv ("SHELL");
584 if (sh == 0)
585 sh = "sh";
587 /* Use our buffer's default directory for the subshell. */
588 if (str)
589 chdir ((char *) str);
591 close_process_descs (); /* Close Emacs's pipes/ptys */
593 #ifdef SET_EMACS_PRIORITY
595 extern EMACS_INT emacs_priority;
597 if (emacs_priority < 0)
598 nice (-emacs_priority);
600 #endif
602 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */
604 char *epwd = getenv ("PWD");
605 char old_pwd[MAXPATHLEN+1+4];
607 /* If PWD is set, pass it with corrected value. */
608 if (epwd)
610 strcpy (old_pwd, epwd);
611 if (str[len - 1] == '/')
612 str[len - 1] = '\0';
613 setenv ("PWD", str, 1);
615 st = system (sh);
616 chdir (oldwd);
617 if (epwd)
618 putenv (old_pwd); /* restore previous value */
620 #else /* not MSDOS */
621 #ifdef WINDOWSNT
622 /* Waits for process completion */
623 pid = _spawnlp (_P_WAIT, sh, sh, NULL);
624 chdir (oldwd);
625 if (pid == -1)
626 write (1, "Can't execute subshell", 22);
627 #else /* not WINDOWSNT */
628 execlp (sh, sh, (char *) 0);
629 write (1, "Can't execute subshell", 22);
630 _exit (1);
631 #endif /* not WINDOWSNT */
632 #endif /* not MSDOS */
635 /* Do this now if we did not do it before. */
636 #ifndef MSDOS
637 save_signal_handlers (saved_handlers);
638 synch_process_alive = 1;
639 #endif
641 #ifndef DOS_NT
642 wait_for_termination (pid);
643 #endif
644 restore_signal_handlers (saved_handlers);
645 synch_process_alive = 0;
648 static void
649 save_signal_handlers (struct save_signal *saved_handlers)
651 while (saved_handlers->code)
653 saved_handlers->handler
654 = (SIGTYPE (*) (int)) signal (saved_handlers->code, SIG_IGN);
655 saved_handlers++;
659 static void
660 restore_signal_handlers (struct save_signal *saved_handlers)
662 while (saved_handlers->code)
664 signal (saved_handlers->code, saved_handlers->handler);
665 saved_handlers++;
669 #ifndef SIGIO
670 /* If SIGIO is broken, don't do anything. */
671 void
672 init_sigio (int fd)
676 void
677 reset_sigio (int fd)
681 void
682 request_sigio (void)
686 void
687 unrequest_sigio (void)
691 #else
692 #ifdef F_SETFL
694 int old_fcntl_flags[MAXDESC];
696 void
697 init_sigio (int fd)
699 #ifdef FASYNC
700 old_fcntl_flags[fd] = fcntl (fd, F_GETFL, 0) & ~FASYNC;
701 fcntl (fd, F_SETFL, old_fcntl_flags[fd] | FASYNC);
702 #endif
703 interrupts_deferred = 0;
706 void
707 reset_sigio (int fd)
709 #ifdef FASYNC
710 fcntl (fd, F_SETFL, old_fcntl_flags[fd]);
711 #endif
714 #ifdef FASYNC /* F_SETFL does not imply existence of FASYNC */
715 /* XXX Uhm, FASYNC is not used anymore here. */
716 /* XXX Yeah, but you need it for SIGIO, don't you? */
718 void
719 request_sigio (void)
721 if (noninteractive)
722 return;
724 #ifdef SIGWINCH
725 sigunblock (sigmask (SIGWINCH));
726 #endif
727 sigunblock (sigmask (SIGIO));
729 interrupts_deferred = 0;
732 void
733 unrequest_sigio (void)
735 if (noninteractive)
736 return;
738 #if 0 /* XXX What's wrong with blocking SIGIO under X? */
739 if (x_display_list)
740 return;
741 #endif
743 #ifdef SIGWINCH
744 sigblock (sigmask (SIGWINCH));
745 #endif
746 sigblock (sigmask (SIGIO));
747 interrupts_deferred = 1;
750 #else /* no FASYNC */
751 #ifndef MSDOS
753 void
754 request_sigio (void)
756 if (noninteractive || read_socket_hook)
757 return;
759 croak ("request_sigio");
762 void
763 unrequest_sigio (void)
765 if (noninteractive || read_socket_hook)
766 return;
768 croak ("unrequest_sigio");
771 #endif /* MSDOS */
772 #endif /* FASYNC */
773 #endif /* F_SETFL */
774 #endif /* SIGIO */
777 /* Getting and setting emacs_tty structures. */
779 /* Set *TC to the parameters associated with the terminal FD.
780 Return zero if all's well, or -1 if we ran into an error we
781 couldn't deal with. */
783 emacs_get_tty (int fd, struct emacs_tty *settings)
785 /* Retrieve the primary parameters - baud rate, character size, etcetera. */
786 #ifndef DOS_NT
787 /* We have those nifty POSIX tcmumbleattr functions. */
788 memset (&settings->main, 0, sizeof (settings->main));
789 if (tcgetattr (fd, &settings->main) < 0)
790 return -1;
791 #endif
793 /* We have survived the tempest. */
794 return 0;
798 /* Set the parameters of the tty on FD according to the contents of
799 *SETTINGS. If FLUSHP is non-zero, we discard input.
800 Return 0 if all went well, and -1 if anything failed. */
803 emacs_set_tty (int fd, struct emacs_tty *settings, int flushp)
805 /* Set the primary parameters - baud rate, character size, etcetera. */
806 #ifndef DOS_NT
807 int i;
808 /* We have those nifty POSIX tcmumbleattr functions.
809 William J. Smith <wjs@wiis.wang.com> writes:
810 "POSIX 1003.1 defines tcsetattr to return success if it was
811 able to perform any of the requested actions, even if some
812 of the requested actions could not be performed.
813 We must read settings back to ensure tty setup properly.
814 AIX requires this to keep tty from hanging occasionally." */
815 /* This make sure that we don't loop indefinitely in here. */
816 for (i = 0 ; i < 10 ; i++)
817 if (tcsetattr (fd, flushp ? TCSAFLUSH : TCSADRAIN, &settings->main) < 0)
819 if (errno == EINTR)
820 continue;
821 else
822 return -1;
824 else
826 struct termios new;
828 memset (&new, 0, sizeof (new));
829 /* Get the current settings, and see if they're what we asked for. */
830 tcgetattr (fd, &new);
831 /* We cannot use memcmp on the whole structure here because under
832 * aix386 the termios structure has some reserved field that may
833 * not be filled in.
835 if ( new.c_iflag == settings->main.c_iflag
836 && new.c_oflag == settings->main.c_oflag
837 && new.c_cflag == settings->main.c_cflag
838 && new.c_lflag == settings->main.c_lflag
839 && memcmp (new.c_cc, settings->main.c_cc, NCCS) == 0)
840 break;
841 else
842 continue;
844 #endif
846 /* We have survived the tempest. */
847 return 0;
852 #ifdef F_SETOWN
853 int old_fcntl_owner[MAXDESC];
854 #endif /* F_SETOWN */
856 /* This may also be defined in stdio,
857 but if so, this does no harm,
858 and using the same name avoids wasting the other one's space. */
860 #if defined (USG)
861 unsigned char _sobuf[BUFSIZ+8];
862 #else
863 char _sobuf[BUFSIZ];
864 #endif
866 /* Initialize the terminal mode on all tty devices that are currently
867 open. */
869 void
870 init_all_sys_modes (void)
872 struct tty_display_info *tty;
873 for (tty = tty_list; tty; tty = tty->next)
874 init_sys_modes (tty);
877 /* Initialize the terminal mode on the given tty device. */
879 void
880 init_sys_modes (struct tty_display_info *tty_out)
882 struct emacs_tty tty;
884 Vtty_erase_char = Qnil;
886 if (noninteractive)
887 return;
889 if (!tty_out->output)
890 return; /* The tty is suspended. */
892 if (! tty_out->old_tty)
893 tty_out->old_tty = (struct emacs_tty *) xmalloc (sizeof (struct emacs_tty));
895 EMACS_GET_TTY (fileno (tty_out->input), tty_out->old_tty);
897 tty = *tty_out->old_tty;
899 #if !defined (DOS_NT)
900 XSETINT (Vtty_erase_char, tty.main.c_cc[VERASE]);
902 tty.main.c_iflag |= (IGNBRK); /* Ignore break condition */
903 tty.main.c_iflag &= ~ICRNL; /* Disable map of CR to NL on input */
904 #ifdef INLCR /* I'm just being cautious,
905 since I can't check how widespread INLCR is--rms. */
906 tty.main.c_iflag &= ~INLCR; /* Disable map of NL to CR on input */
907 #endif
908 #ifdef ISTRIP
909 tty.main.c_iflag &= ~ISTRIP; /* don't strip 8th bit on input */
910 #endif
911 tty.main.c_lflag &= ~ECHO; /* Disable echo */
912 tty.main.c_lflag &= ~ICANON; /* Disable erase/kill processing */
913 #ifdef IEXTEN
914 tty.main.c_lflag &= ~IEXTEN; /* Disable other editing characters. */
915 #endif
916 tty.main.c_lflag |= ISIG; /* Enable signals */
917 if (tty_out->flow_control)
919 tty.main.c_iflag |= IXON; /* Enable start/stop output control */
920 #ifdef IXANY
921 tty.main.c_iflag &= ~IXANY;
922 #endif /* IXANY */
924 else
925 tty.main.c_iflag &= ~IXON; /* Disable start/stop output control */
926 tty.main.c_oflag &= ~ONLCR; /* Disable map of NL to CR-NL
927 on output */
928 tty.main.c_oflag &= ~TAB3; /* Disable tab expansion */
929 #ifdef CS8
930 if (tty_out->meta_key)
932 tty.main.c_cflag |= CS8; /* allow 8th bit on input */
933 tty.main.c_cflag &= ~PARENB;/* Don't check parity */
935 #endif
936 if (tty_out->input == stdin)
938 tty.main.c_cc[VINTR] = quit_char; /* C-g (usually) gives SIGINT */
939 /* Set up C-g for both SIGQUIT and SIGINT.
940 We don't know which we will get, but we handle both alike
941 so which one it really gives us does not matter. */
942 tty.main.c_cc[VQUIT] = quit_char;
944 else
946 /* We normally don't get interrupt or quit signals from tty
947 devices other than our controlling terminal; therefore,
948 we must handle C-g as normal input. Unfortunately, this
949 means that the interrupt and quit feature must be
950 disabled on secondary ttys, or we would not even see the
951 keypress.
953 Note that even though emacsclient could have special code
954 to pass SIGINT to Emacs, we should _not_ enable
955 interrupt/quit keys for emacsclient frames. This means
956 that we can't break out of loops in C code from a
957 secondary tty frame, but we can always decide what
958 display the C-g came from, which is more important from a
959 usability point of view. (Consider the case when two
960 people work together using the same Emacs instance.) */
961 tty.main.c_cc[VINTR] = CDISABLE;
962 tty.main.c_cc[VQUIT] = CDISABLE;
964 tty.main.c_cc[VMIN] = 1; /* Input should wait for at least 1 char */
965 tty.main.c_cc[VTIME] = 0; /* no matter how long that takes. */
966 #ifdef VSWTCH
967 tty.main.c_cc[VSWTCH] = CDISABLE; /* Turn off shell layering use
968 of C-z */
969 #endif /* VSWTCH */
971 #ifdef VSUSP
972 tty.main.c_cc[VSUSP] = CDISABLE; /* Turn off handling of C-z. */
973 #endif /* VSUSP */
974 #ifdef V_DSUSP
975 tty.main.c_cc[V_DSUSP] = CDISABLE; /* Turn off handling of C-y. */
976 #endif /* V_DSUSP */
977 #ifdef VDSUSP /* Some systems have VDSUSP, some have V_DSUSP. */
978 tty.main.c_cc[VDSUSP] = CDISABLE;
979 #endif /* VDSUSP */
980 #ifdef VLNEXT
981 tty.main.c_cc[VLNEXT] = CDISABLE;
982 #endif /* VLNEXT */
983 #ifdef VREPRINT
984 tty.main.c_cc[VREPRINT] = CDISABLE;
985 #endif /* VREPRINT */
986 #ifdef VWERASE
987 tty.main.c_cc[VWERASE] = CDISABLE;
988 #endif /* VWERASE */
989 #ifdef VDISCARD
990 tty.main.c_cc[VDISCARD] = CDISABLE;
991 #endif /* VDISCARD */
993 if (tty_out->flow_control)
995 #ifdef VSTART
996 tty.main.c_cc[VSTART] = '\021';
997 #endif /* VSTART */
998 #ifdef VSTOP
999 tty.main.c_cc[VSTOP] = '\023';
1000 #endif /* VSTOP */
1002 else
1004 #ifdef VSTART
1005 tty.main.c_cc[VSTART] = CDISABLE;
1006 #endif /* VSTART */
1007 #ifdef VSTOP
1008 tty.main.c_cc[VSTOP] = CDISABLE;
1009 #endif /* VSTOP */
1012 #ifdef AIX
1013 tty.main.c_cc[VSTRT] = CDISABLE;
1014 tty.main.c_cc[VSTOP] = CDISABLE;
1015 tty.main.c_cc[VSUSP] = CDISABLE;
1016 tty.main.c_cc[VDSUSP] = CDISABLE;
1017 if (tty_out->flow_control)
1019 #ifdef VSTART
1020 tty.main.c_cc[VSTART] = '\021';
1021 #endif /* VSTART */
1022 #ifdef VSTOP
1023 tty.main.c_cc[VSTOP] = '\023';
1024 #endif /* VSTOP */
1026 /* Also, PTY overloads NUL and BREAK.
1027 don't ignore break, but don't signal either, so it looks like NUL.
1028 This really serves a purpose only if running in an XTERM window
1029 or via TELNET or the like, but does no harm elsewhere. */
1030 tty.main.c_iflag &= ~IGNBRK;
1031 tty.main.c_iflag &= ~BRKINT;
1032 #endif
1033 #endif /* not DOS_NT */
1035 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida, MW Aug 1993 */
1036 if (!tty_out->term_initted)
1037 internal_terminal_init ();
1038 dos_ttraw (tty_out);
1039 #endif
1041 EMACS_SET_TTY (fileno (tty_out->input), &tty, 0);
1043 /* This code added to insure that, if flow-control is not to be used,
1044 we have an unlocked terminal at the start. */
1046 #ifdef TCXONC
1047 if (!tty_out->flow_control) ioctl (fileno (tty_out->input), TCXONC, 1);
1048 #endif
1049 #ifdef TIOCSTART
1050 if (!tty_out->flow_control) ioctl (fileno (tty_out->input), TIOCSTART, 0);
1051 #endif
1053 #if !defined (DOS_NT)
1054 #ifdef TCOON
1055 if (!tty_out->flow_control) tcflow (fileno (tty_out->input), TCOON);
1056 #endif
1057 #endif
1059 #ifdef F_SETFL
1060 #ifdef F_GETOWN /* F_SETFL does not imply existence of F_GETOWN */
1061 if (interrupt_input)
1063 old_fcntl_owner[fileno (tty_out->input)] =
1064 fcntl (fileno (tty_out->input), F_GETOWN, 0);
1065 fcntl (fileno (tty_out->input), F_SETOWN, getpid ());
1066 init_sigio (fileno (tty_out->input));
1067 #ifdef HAVE_GPM
1068 if (gpm_tty == tty_out)
1070 /* Arrange for mouse events to give us SIGIO signals. */
1071 fcntl (gpm_fd, F_SETOWN, getpid ());
1072 fcntl (gpm_fd, F_SETFL, fcntl (gpm_fd, F_GETFL, 0) | O_NONBLOCK);
1073 init_sigio (gpm_fd);
1075 #endif /* HAVE_GPM */
1077 #endif /* F_GETOWN */
1078 #endif /* F_SETFL */
1080 #ifdef _IOFBF
1081 /* This symbol is defined on recent USG systems.
1082 Someone says without this call USG won't really buffer the file
1083 even with a call to setbuf. */
1084 setvbuf (tty_out->output, (char *) _sobuf, _IOFBF, sizeof _sobuf);
1085 #else
1086 setbuf (tty_out->output, (char *) _sobuf);
1087 #endif
1089 if (tty_out->terminal->set_terminal_modes_hook)
1090 tty_out->terminal->set_terminal_modes_hook (tty_out->terminal);
1092 if (!tty_out->term_initted)
1094 Lisp_Object tail, frame;
1095 FOR_EACH_FRAME (tail, frame)
1097 /* XXX This needs to be revised. */
1098 if (FRAME_TERMCAP_P (XFRAME (frame))
1099 && FRAME_TTY (XFRAME (frame)) == tty_out)
1100 init_frame_faces (XFRAME (frame));
1104 if (tty_out->term_initted && no_redraw_on_reenter)
1106 /* We used to call "direct_output_forward_char(0)" here,
1107 but it's not clear why, since it may not do anything anyway. */
1109 else
1111 Lisp_Object tail, frame;
1112 frame_garbaged = 1;
1113 FOR_EACH_FRAME (tail, frame)
1115 if ((FRAME_TERMCAP_P (XFRAME (frame))
1116 || FRAME_MSDOS_P (XFRAME (frame)))
1117 && FRAME_TTY (XFRAME (frame)) == tty_out)
1118 FRAME_GARBAGED_P (XFRAME (frame)) = 1;
1122 tty_out->term_initted = 1;
1125 /* Return nonzero if safe to use tabs in output.
1126 At the time this is called, init_sys_modes has not been done yet. */
1129 tabs_safe_p (int fd)
1131 struct emacs_tty etty;
1133 EMACS_GET_TTY (fd, &etty);
1134 return EMACS_TTY_TABS_OK (&etty);
1137 /* Get terminal size from system.
1138 Store number of lines into *HEIGHTP and width into *WIDTHP.
1139 We store 0 if there's no valid information. */
1141 void
1142 get_tty_size (int fd, int *widthp, int *heightp)
1145 #ifdef TIOCGWINSZ
1147 /* BSD-style. */
1148 struct winsize size;
1150 if (ioctl (fd, TIOCGWINSZ, &size) == -1)
1151 *widthp = *heightp = 0;
1152 else
1154 *widthp = size.ws_col;
1155 *heightp = size.ws_row;
1158 #else
1159 #ifdef TIOCGSIZE
1161 /* SunOS - style. */
1162 struct ttysize size;
1164 if (ioctl (fd, TIOCGSIZE, &size) == -1)
1165 *widthp = *heightp = 0;
1166 else
1168 *widthp = size.ts_cols;
1169 *heightp = size.ts_lines;
1172 #else
1173 #ifdef MSDOS
1174 *widthp = ScreenCols ();
1175 *heightp = ScreenRows ();
1176 #else /* system doesn't know size */
1177 *widthp = 0;
1178 *heightp = 0;
1179 #endif
1180 #endif /* not SunOS-style */
1181 #endif /* not BSD-style */
1184 /* Set the logical window size associated with descriptor FD
1185 to HEIGHT and WIDTH. This is used mainly with ptys. */
1188 set_window_size (int fd, int height, int width)
1190 #ifdef TIOCSWINSZ
1192 /* BSD-style. */
1193 struct winsize size;
1194 size.ws_row = height;
1195 size.ws_col = width;
1197 if (ioctl (fd, TIOCSWINSZ, &size) == -1)
1198 return 0; /* error */
1199 else
1200 return 1;
1202 #else
1203 #ifdef TIOCSSIZE
1205 /* SunOS - style. */
1206 struct ttysize size;
1207 size.ts_lines = height;
1208 size.ts_cols = width;
1210 if (ioctl (fd, TIOCGSIZE, &size) == -1)
1211 return 0;
1212 else
1213 return 1;
1214 #else
1215 return -1;
1216 #endif /* not SunOS-style */
1217 #endif /* not BSD-style */
1222 /* Prepare all terminal devices for exiting Emacs. */
1224 void
1225 reset_all_sys_modes (void)
1227 struct tty_display_info *tty;
1228 for (tty = tty_list; tty; tty = tty->next)
1229 reset_sys_modes (tty);
1232 /* Prepare the terminal for closing it; move the cursor to the
1233 bottom of the frame, turn off interrupt-driven I/O, etc. */
1235 void
1236 reset_sys_modes (struct tty_display_info *tty_out)
1238 if (noninteractive)
1240 fflush (stdout);
1241 return;
1243 if (!tty_out->term_initted)
1244 return;
1246 if (!tty_out->output)
1247 return; /* The tty is suspended. */
1249 /* Go to and clear the last line of the terminal. */
1251 cmgoto (tty_out, FrameRows (tty_out) - 1, 0);
1253 /* Code adapted from tty_clear_end_of_line. */
1254 if (tty_out->TS_clr_line)
1256 emacs_tputs (tty_out, tty_out->TS_clr_line, 1, cmputc);
1258 else
1259 { /* have to do it the hard way */
1260 int i;
1261 tty_turn_off_insert (tty_out);
1263 for (i = curX (tty_out); i < FrameCols (tty_out) - 1; i++)
1265 fputc (' ', tty_out->output);
1269 cmgoto (tty_out, FrameRows (tty_out) - 1, 0);
1270 fflush (tty_out->output);
1272 if (tty_out->terminal->reset_terminal_modes_hook)
1273 tty_out->terminal->reset_terminal_modes_hook (tty_out->terminal);
1275 #ifdef BSD_SYSTEM
1276 /* Avoid possible loss of output when changing terminal modes. */
1277 fsync (fileno (tty_out->output));
1278 #endif
1280 #ifdef F_SETFL
1281 #ifdef F_SETOWN /* F_SETFL does not imply existence of F_SETOWN */
1282 if (interrupt_input)
1284 reset_sigio (fileno (tty_out->input));
1285 fcntl (fileno (tty_out->input), F_SETOWN,
1286 old_fcntl_owner[fileno (tty_out->input)]);
1288 #endif /* F_SETOWN */
1289 #ifdef O_NDELAY
1290 fcntl (fileno (tty_out->input), F_SETFL,
1291 fcntl (fileno (tty_out->input), F_GETFL, 0) & ~O_NDELAY);
1292 #endif
1293 #endif /* F_SETFL */
1295 if (tty_out->old_tty)
1296 while (EMACS_SET_TTY (fileno (tty_out->input),
1297 tty_out->old_tty, 0) < 0 && errno == EINTR)
1300 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */
1301 dos_ttcooked ();
1302 #endif
1306 #ifdef HAVE_PTYS
1308 /* Set up the proper status flags for use of a pty. */
1310 void
1311 setup_pty (int fd)
1313 /* I'm told that TOICREMOTE does not mean control chars
1314 "can't be sent" but rather that they don't have
1315 input-editing or signaling effects.
1316 That should be good, because we have other ways
1317 to do those things in Emacs.
1318 However, telnet mode seems not to work on 4.2.
1319 So TIOCREMOTE is turned off now. */
1321 /* Under hp-ux, if TIOCREMOTE is turned on, some calls
1322 will hang. In particular, the "timeout" feature (which
1323 causes a read to return if there is no data available)
1324 does this. Also it is known that telnet mode will hang
1325 in such a way that Emacs must be stopped (perhaps this
1326 is the same problem).
1328 If TIOCREMOTE is turned off, then there is a bug in
1329 hp-ux which sometimes loses data. Apparently the
1330 code which blocks the master process when the internal
1331 buffer fills up does not work. Other than this,
1332 though, everything else seems to work fine.
1334 Since the latter lossage is more benign, we may as well
1335 lose that way. -- cph */
1336 #ifdef FIONBIO
1337 #if defined(UNIX98_PTYS)
1339 int on = 1;
1340 ioctl (fd, FIONBIO, &on);
1342 #endif
1343 #endif
1345 #endif /* HAVE_PTYS */
1347 /* init_system_name sets up the string for the Lisp function
1348 system-name to return. */
1350 extern Lisp_Object Vsystem_name;
1352 #ifdef HAVE_SOCKETS
1353 #include <sys/socket.h>
1354 #include <netdb.h>
1355 #endif /* HAVE_SOCKETS */
1357 #ifdef TRY_AGAIN
1358 #ifndef HAVE_H_ERRNO
1359 extern int h_errno;
1360 #endif
1361 #endif /* TRY_AGAIN */
1363 void
1364 init_system_name (void)
1366 #ifndef HAVE_GETHOSTNAME
1367 struct utsname uts;
1368 uname (&uts);
1369 Vsystem_name = build_string (uts.nodename);
1370 #else /* HAVE_GETHOSTNAME */
1371 unsigned int hostname_size = 256;
1372 char *hostname = (char *) alloca (hostname_size);
1374 /* Try to get the host name; if the buffer is too short, try
1375 again. Apparently, the only indication gethostname gives of
1376 whether the buffer was large enough is the presence or absence
1377 of a '\0' in the string. Eech. */
1378 for (;;)
1380 gethostname (hostname, hostname_size - 1);
1381 hostname[hostname_size - 1] = '\0';
1383 /* Was the buffer large enough for the '\0'? */
1384 if (strlen (hostname) < hostname_size - 1)
1385 break;
1387 hostname_size <<= 1;
1388 hostname = (char *) alloca (hostname_size);
1390 #ifdef HAVE_SOCKETS
1391 /* Turn the hostname into the official, fully-qualified hostname.
1392 Don't do this if we're going to dump; this can confuse system
1393 libraries on some machines and make the dumped emacs core dump. */
1394 #ifndef CANNOT_DUMP
1395 if (initialized)
1396 #endif /* not CANNOT_DUMP */
1397 if (! strchr (hostname, '.'))
1399 int count;
1400 #ifdef HAVE_GETADDRINFO
1401 struct addrinfo *res;
1402 struct addrinfo hints;
1403 int ret;
1405 memset (&hints, 0, sizeof (hints));
1406 hints.ai_socktype = SOCK_STREAM;
1407 hints.ai_flags = AI_CANONNAME;
1409 for (count = 0;; count++)
1411 if ((ret = getaddrinfo (hostname, NULL, &hints, &res)) == 0
1412 || ret != EAI_AGAIN)
1413 break;
1415 if (count >= 5)
1416 break;
1417 Fsleep_for (make_number (1), Qnil);
1420 if (ret == 0)
1422 struct addrinfo *it = res;
1423 while (it)
1425 char *fqdn = it->ai_canonname;
1426 if (fqdn && strchr (fqdn, '.')
1427 && strcmp (fqdn, "localhost.localdomain") != 0)
1428 break;
1429 it = it->ai_next;
1431 if (it)
1433 hostname = alloca (strlen (it->ai_canonname) + 1);
1434 strcpy (hostname, it->ai_canonname);
1436 freeaddrinfo (res);
1438 #else /* !HAVE_GETADDRINFO */
1439 struct hostent *hp;
1440 for (count = 0;; count++)
1443 #ifdef TRY_AGAIN
1444 h_errno = 0;
1445 #endif
1446 hp = gethostbyname (hostname);
1447 #ifdef TRY_AGAIN
1448 if (! (hp == 0 && h_errno == TRY_AGAIN))
1449 #endif
1451 break;
1453 if (count >= 5)
1454 break;
1455 Fsleep_for (make_number (1), Qnil);
1458 if (hp)
1460 char *fqdn = (char *) hp->h_name;
1462 if (!strchr (fqdn, '.'))
1464 /* We still don't have a fully qualified domain name.
1465 Try to find one in the list of alternate names */
1466 char **alias = hp->h_aliases;
1467 while (*alias
1468 && (!strchr (*alias, '.')
1469 || !strcmp (*alias, "localhost.localdomain")))
1470 alias++;
1471 if (*alias)
1472 fqdn = *alias;
1474 hostname = fqdn;
1476 #endif /* !HAVE_GETADDRINFO */
1478 #endif /* HAVE_SOCKETS */
1479 Vsystem_name = build_string (hostname);
1480 #endif /* HAVE_GETHOSTNAME */
1482 unsigned char *p;
1483 for (p = SDATA (Vsystem_name); *p; p++)
1484 if (*p == ' ' || *p == '\t')
1485 *p = '-';
1489 #ifndef MSDOS
1490 #if !defined (HAVE_SELECT)
1492 #include "sysselect.h"
1493 #undef select
1495 #if defined (HAVE_X_WINDOWS) && !defined (HAVE_SELECT)
1496 /* Cause explanatory error message at compile time,
1497 since the select emulation is not good enough for X. */
1498 int *x = &x_windows_lose_if_no_select_system_call;
1499 #endif
1501 /* Emulate as much as select as is possible under 4.1 and needed by Gnu Emacs
1502 * Only checks read descriptors.
1504 /* How long to wait between checking fds in select */
1505 #define SELECT_PAUSE 1
1506 int select_alarmed;
1508 /* For longjmp'ing back to read_input_waiting. */
1510 jmp_buf read_alarm_throw;
1512 /* Nonzero if the alarm signal should throw back to read_input_waiting.
1513 The read_socket_hook function sets this to 1 while it is waiting. */
1515 int read_alarm_should_throw;
1517 void
1518 select_alarm (int ignore)
1520 select_alarmed = 1;
1521 signal (SIGALRM, SIG_IGN);
1522 SIGNAL_THREAD_CHECK (SIGALRM);
1523 if (read_alarm_should_throw)
1524 longjmp (read_alarm_throw, 1);
1527 #ifndef WINDOWSNT
1528 /* Only rfds are checked. */
1530 sys_select (int nfds,
1531 SELECT_TYPE *rfds, SELECT_TYPE *wfds, SELECT_TYPE *efds,
1532 EMACS_TIME *timeout)
1534 /* XXX This needs to be updated for multi-tty support. Is there
1535 anybody who needs to emulate select these days? */
1536 int ravail = 0;
1537 SELECT_TYPE orfds;
1538 int timeoutval;
1539 int *local_timeout;
1540 extern int proc_buffered_char[];
1541 extern int process_tick, update_tick;
1542 unsigned char buf;
1544 #if defined (HAVE_SELECT) && defined (HAVE_X_WINDOWS)
1545 /* If we're using X, then the native select will work; we only need the
1546 emulation for non-X usage. */
1547 if (!NILP (Vinitial_window_system))
1548 return select (nfds, rfds, wfds, efds, timeout);
1549 #endif
1550 timeoutval = timeout ? EMACS_SECS (*timeout) : 100000;
1551 local_timeout = &timeoutval;
1552 FD_ZERO (&orfds);
1553 if (rfds)
1555 orfds = *rfds;
1556 FD_ZERO (rfds);
1558 if (wfds)
1559 FD_ZERO (wfds);
1560 if (efds)
1561 FD_ZERO (efds);
1563 /* If we are looking only for the terminal, with no timeout,
1564 just read it and wait -- that's more efficient. */
1565 if (*local_timeout == 100000 && process_tick == update_tick
1566 && FD_ISSET (0, &orfds))
1568 int fd;
1569 for (fd = 1; fd < nfds; ++fd)
1570 if (FD_ISSET (fd, &orfds))
1571 goto hardway;
1572 if (! detect_input_pending ())
1573 read_input_waiting ();
1574 FD_SET (0, rfds);
1575 return 1;
1578 hardway:
1579 /* Once a second, till the timer expires, check all the flagged read
1580 * descriptors to see if any input is available. If there is some then
1581 * set the corresponding bit in the return copy of rfds.
1583 while (1)
1585 register int to_check, fd;
1587 if (rfds)
1589 for (to_check = nfds, fd = 0; --to_check >= 0; fd++)
1591 if (FD_ISSET (fd, &orfds))
1593 int avail = 0, status = 0;
1595 if (fd == 0)
1596 avail = detect_input_pending (); /* Special keyboard handler */
1597 else
1599 #ifdef FIONREAD
1600 status = ioctl (fd, FIONREAD, &avail);
1601 #else /* no FIONREAD */
1602 /* Hoping it will return -1 if nothing available
1603 or 0 if all 0 chars requested are read. */
1604 if (proc_buffered_char[fd] >= 0)
1605 avail = 1;
1606 else
1608 avail = read (fd, &buf, 1);
1609 if (avail > 0)
1610 proc_buffered_char[fd] = buf;
1612 #endif /* no FIONREAD */
1614 if (status >= 0 && avail > 0)
1616 FD_SET (fd, rfds);
1617 ravail++;
1622 if (*local_timeout == 0 || ravail != 0 || process_tick != update_tick)
1623 break;
1625 turn_on_atimers (0);
1626 signal (SIGALRM, select_alarm);
1627 select_alarmed = 0;
1628 alarm (SELECT_PAUSE);
1630 /* Wait for a SIGALRM (or maybe a SIGTINT) */
1631 while (select_alarmed == 0 && *local_timeout != 0
1632 && process_tick == update_tick)
1634 /* If we are interested in terminal input,
1635 wait by reading the terminal.
1636 That makes instant wakeup for terminal input at least. */
1637 if (FD_ISSET (0, &orfds))
1639 read_input_waiting ();
1640 if (detect_input_pending ())
1641 select_alarmed = 1;
1643 else
1644 pause ();
1646 (*local_timeout) -= SELECT_PAUSE;
1648 /* Reset the old alarm if there was one. */
1649 turn_on_atimers (1);
1651 if (*local_timeout == 0) /* Stop on timer being cleared */
1652 break;
1654 return ravail;
1656 #endif /* not WINDOWSNT */
1658 /* Read keyboard input into the standard buffer,
1659 waiting for at least one character. */
1661 void
1662 read_input_waiting (void)
1664 /* XXX This needs to be updated for multi-tty support. Is there
1665 anybody who needs to emulate select these days? */
1666 int nread, i;
1668 if (read_socket_hook)
1670 struct input_event hold_quit;
1672 EVENT_INIT (hold_quit);
1673 hold_quit.kind = NO_EVENT;
1675 read_alarm_should_throw = 0;
1676 if (! setjmp (read_alarm_throw))
1677 nread = (*read_socket_hook) (0, 1, &hold_quit);
1678 else
1679 nread = -1;
1681 if (hold_quit.kind != NO_EVENT)
1682 kbd_buffer_store_event (&hold_quit);
1684 else
1686 struct input_event e;
1687 char buf[3];
1688 nread = read (fileno (stdin), buf, 1);
1689 EVENT_INIT (e);
1691 /* Scan the chars for C-g and store them in kbd_buffer. */
1692 e.kind = ASCII_KEYSTROKE_EVENT;
1693 e.frame_or_window = selected_frame;
1694 e.modifiers = 0;
1695 for (i = 0; i < nread; i++)
1697 /* Convert chars > 0177 to meta events if desired.
1698 We do this under the same conditions that read_avail_input does. */
1699 if (read_socket_hook == 0)
1701 /* If the user says she has a meta key, then believe her. */
1702 if (meta_key == 1 && (buf[i] & 0x80))
1703 e.modifiers = meta_modifier;
1704 if (meta_key != 2)
1705 buf[i] &= ~0x80;
1708 XSETINT (e.code, buf[i]);
1709 kbd_buffer_store_event (&e);
1710 /* Don't look at input that follows a C-g too closely.
1711 This reduces lossage due to autorepeat on C-g. */
1712 if (buf[i] == quit_char)
1713 break;
1718 #if !defined (HAVE_SELECT)
1719 #define select sys_select
1720 #endif
1722 #endif /* not HAVE_SELECT */
1723 #endif /* not MSDOS */
1725 /* POSIX signals support - DJB */
1726 /* Anyone with POSIX signals should have ANSI C declarations */
1728 sigset_t empty_mask, full_mask;
1730 #ifndef WINDOWSNT
1732 signal_handler_t
1733 sys_signal (int signal_number, signal_handler_t action)
1735 struct sigaction new_action, old_action;
1736 sigemptyset (&new_action.sa_mask);
1737 new_action.sa_handler = action;
1738 new_action.sa_flags = 0;
1739 #if defined (SA_RESTART)
1740 /* Emacs mostly works better with restartable system services. If this
1741 flag exists, we probably want to turn it on here.
1742 However, on some systems this resets the timeout of `select'
1743 which means that `select' never finishes if it keeps getting signals.
1744 BROKEN_SA_RESTART is defined on those systems. */
1745 /* It's not clear why the comment above says "mostly works better". --Stef
1746 When SYNC_INPUT is set, we don't want SA_RESTART because we need to poll
1747 for pending input so we need long-running syscalls to be interrupted
1748 after a signal that sets the interrupt_input_pending flag. */
1749 /* Non-interactive keyboard input goes through stdio, where we always
1750 want restartable system calls. */
1751 # if defined (BROKEN_SA_RESTART) || defined(SYNC_INPUT)
1752 if (noninteractive)
1753 # endif
1754 new_action.sa_flags = SA_RESTART;
1755 #endif
1756 sigaction (signal_number, &new_action, &old_action);
1757 return (old_action.sa_handler);
1760 #endif /* WINDOWSNT */
1762 #ifndef __GNUC__
1763 /* If we're compiling with GCC, we don't need this function, since it
1764 can be written as a macro. */
1765 sigset_t
1766 sys_sigmask (int sig)
1768 sigset_t mask;
1769 sigemptyset (&mask);
1770 sigaddset (&mask, sig);
1771 return mask;
1773 #endif
1775 /* I'd like to have these guys return pointers to the mask storage in here,
1776 but there'd be trouble if the code was saving multiple masks. I'll be
1777 safe and pass the structure. It normally won't be more than 2 bytes
1778 anyhow. - DJB */
1780 sigset_t
1781 sys_sigblock (sigset_t new_mask)
1783 sigset_t old_mask;
1784 sigprocmask (SIG_BLOCK, &new_mask, &old_mask);
1785 return (old_mask);
1788 sigset_t
1789 sys_sigunblock (sigset_t new_mask)
1791 sigset_t old_mask;
1792 sigprocmask (SIG_UNBLOCK, &new_mask, &old_mask);
1793 return (old_mask);
1796 sigset_t
1797 sys_sigsetmask (sigset_t new_mask)
1799 sigset_t old_mask;
1800 sigprocmask (SIG_SETMASK, &new_mask, &old_mask);
1801 return (old_mask);
1805 #if !defined HAVE_STRSIGNAL && !HAVE_DECL_SYS_SIGLIST
1806 static char *my_sys_siglist[NSIG];
1807 # ifdef sys_siglist
1808 # undef sys_siglist
1809 # endif
1810 # define sys_siglist my_sys_siglist
1811 #endif
1813 void
1814 init_signals (void)
1816 sigemptyset (&empty_mask);
1817 sigfillset (&full_mask);
1819 #if !defined HAVE_STRSIGNAL && !HAVE_DECL_SYS_SIGLIST
1820 if (! initialized)
1822 # ifdef SIGABRT
1823 sys_siglist[SIGABRT] = "Aborted";
1824 # endif
1825 # ifdef SIGAIO
1826 sys_siglist[SIGAIO] = "LAN I/O interrupt";
1827 # endif
1828 # ifdef SIGALRM
1829 sys_siglist[SIGALRM] = "Alarm clock";
1830 # endif
1831 # ifdef SIGBUS
1832 sys_siglist[SIGBUS] = "Bus error";
1833 # endif
1834 # ifdef SIGCLD
1835 sys_siglist[SIGCLD] = "Child status changed";
1836 # endif
1837 # ifdef SIGCHLD
1838 sys_siglist[SIGCHLD] = "Child status changed";
1839 # endif
1840 # ifdef SIGCONT
1841 sys_siglist[SIGCONT] = "Continued";
1842 # endif
1843 # ifdef SIGDANGER
1844 sys_siglist[SIGDANGER] = "Swap space dangerously low";
1845 # endif
1846 # ifdef SIGDGNOTIFY
1847 sys_siglist[SIGDGNOTIFY] = "Notification message in queue";
1848 # endif
1849 # ifdef SIGEMT
1850 sys_siglist[SIGEMT] = "Emulation trap";
1851 # endif
1852 # ifdef SIGFPE
1853 sys_siglist[SIGFPE] = "Arithmetic exception";
1854 # endif
1855 # ifdef SIGFREEZE
1856 sys_siglist[SIGFREEZE] = "SIGFREEZE";
1857 # endif
1858 # ifdef SIGGRANT
1859 sys_siglist[SIGGRANT] = "Monitor mode granted";
1860 # endif
1861 # ifdef SIGHUP
1862 sys_siglist[SIGHUP] = "Hangup";
1863 # endif
1864 # ifdef SIGILL
1865 sys_siglist[SIGILL] = "Illegal instruction";
1866 # endif
1867 # ifdef SIGINT
1868 sys_siglist[SIGINT] = "Interrupt";
1869 # endif
1870 # ifdef SIGIO
1871 sys_siglist[SIGIO] = "I/O possible";
1872 # endif
1873 # ifdef SIGIOINT
1874 sys_siglist[SIGIOINT] = "I/O intervention required";
1875 # endif
1876 # ifdef SIGIOT
1877 sys_siglist[SIGIOT] = "IOT trap";
1878 # endif
1879 # ifdef SIGKILL
1880 sys_siglist[SIGKILL] = "Killed";
1881 # endif
1882 # ifdef SIGLOST
1883 sys_siglist[SIGLOST] = "Resource lost";
1884 # endif
1885 # ifdef SIGLWP
1886 sys_siglist[SIGLWP] = "SIGLWP";
1887 # endif
1888 # ifdef SIGMSG
1889 sys_siglist[SIGMSG] = "Monitor mode data available";
1890 # endif
1891 # ifdef SIGPHONE
1892 sys_siglist[SIGWIND] = "SIGPHONE";
1893 # endif
1894 # ifdef SIGPIPE
1895 sys_siglist[SIGPIPE] = "Broken pipe";
1896 # endif
1897 # ifdef SIGPOLL
1898 sys_siglist[SIGPOLL] = "Pollable event occurred";
1899 # endif
1900 # ifdef SIGPROF
1901 sys_siglist[SIGPROF] = "Profiling timer expired";
1902 # endif
1903 # ifdef SIGPTY
1904 sys_siglist[SIGPTY] = "PTY I/O interrupt";
1905 # endif
1906 # ifdef SIGPWR
1907 sys_siglist[SIGPWR] = "Power-fail restart";
1908 # endif
1909 # ifdef SIGQUIT
1910 sys_siglist[SIGQUIT] = "Quit";
1911 # endif
1912 # ifdef SIGRETRACT
1913 sys_siglist[SIGRETRACT] = "Need to relinguish monitor mode";
1914 # endif
1915 # ifdef SIGSAK
1916 sys_siglist[SIGSAK] = "Secure attention";
1917 # endif
1918 # ifdef SIGSEGV
1919 sys_siglist[SIGSEGV] = "Segmentation violation";
1920 # endif
1921 # ifdef SIGSOUND
1922 sys_siglist[SIGSOUND] = "Sound completed";
1923 # endif
1924 # ifdef SIGSTOP
1925 sys_siglist[SIGSTOP] = "Stopped (signal)";
1926 # endif
1927 # ifdef SIGSTP
1928 sys_siglist[SIGSTP] = "Stopped (user)";
1929 # endif
1930 # ifdef SIGSYS
1931 sys_siglist[SIGSYS] = "Bad argument to system call";
1932 # endif
1933 # ifdef SIGTERM
1934 sys_siglist[SIGTERM] = "Terminated";
1935 # endif
1936 # ifdef SIGTHAW
1937 sys_siglist[SIGTHAW] = "SIGTHAW";
1938 # endif
1939 # ifdef SIGTRAP
1940 sys_siglist[SIGTRAP] = "Trace/breakpoint trap";
1941 # endif
1942 # ifdef SIGTSTP
1943 sys_siglist[SIGTSTP] = "Stopped (user)";
1944 # endif
1945 # ifdef SIGTTIN
1946 sys_siglist[SIGTTIN] = "Stopped (tty input)";
1947 # endif
1948 # ifdef SIGTTOU
1949 sys_siglist[SIGTTOU] = "Stopped (tty output)";
1950 # endif
1951 # ifdef SIGURG
1952 sys_siglist[SIGURG] = "Urgent I/O condition";
1953 # endif
1954 # ifdef SIGUSR1
1955 sys_siglist[SIGUSR1] = "User defined signal 1";
1956 # endif
1957 # ifdef SIGUSR2
1958 sys_siglist[SIGUSR2] = "User defined signal 2";
1959 # endif
1960 # ifdef SIGVTALRM
1961 sys_siglist[SIGVTALRM] = "Virtual timer expired";
1962 # endif
1963 # ifdef SIGWAITING
1964 sys_siglist[SIGWAITING] = "Process's LWPs are blocked";
1965 # endif
1966 # ifdef SIGWINCH
1967 sys_siglist[SIGWINCH] = "Window size changed";
1968 # endif
1969 # ifdef SIGWIND
1970 sys_siglist[SIGWIND] = "SIGWIND";
1971 # endif
1972 # ifdef SIGXCPU
1973 sys_siglist[SIGXCPU] = "CPU time limit exceeded";
1974 # endif
1975 # ifdef SIGXFSZ
1976 sys_siglist[SIGXFSZ] = "File size limit exceeded";
1977 # endif
1979 #endif /* !defined HAVE_STRSIGNAL && !defined HAVE_DECL_SYS_SIGLIST */
1982 #ifndef HAVE_RANDOM
1983 #ifdef random
1984 #define HAVE_RANDOM
1985 #endif
1986 #endif
1988 /* Figure out how many bits the system's random number generator uses.
1989 `random' and `lrand48' are assumed to return 31 usable bits.
1990 BSD `rand' returns a 31 bit value but the low order bits are unusable;
1991 so we'll shift it and treat it like the 15-bit USG `rand'. */
1993 #ifndef RAND_BITS
1994 # ifdef HAVE_RANDOM
1995 # define RAND_BITS 31
1996 # else /* !HAVE_RANDOM */
1997 # ifdef HAVE_LRAND48
1998 # define RAND_BITS 31
1999 # define random lrand48
2000 # else /* !HAVE_LRAND48 */
2001 # define RAND_BITS 15
2002 # if RAND_MAX == 32767
2003 # define random rand
2004 # else /* RAND_MAX != 32767 */
2005 # if RAND_MAX == 2147483647
2006 # define random() (rand () >> 16)
2007 # else /* RAND_MAX != 2147483647 */
2008 # ifdef USG
2009 # define random rand
2010 # else
2011 # define random() (rand () >> 16)
2012 # endif /* !USG */
2013 # endif /* RAND_MAX != 2147483647 */
2014 # endif /* RAND_MAX != 32767 */
2015 # endif /* !HAVE_LRAND48 */
2016 # endif /* !HAVE_RANDOM */
2017 #endif /* !RAND_BITS */
2019 void
2020 seed_random (long int arg)
2022 #ifdef HAVE_RANDOM
2023 srandom ((unsigned int)arg);
2024 #else
2025 # ifdef HAVE_LRAND48
2026 srand48 (arg);
2027 # else
2028 srand ((unsigned int)arg);
2029 # endif
2030 #endif
2034 * Build a full Emacs-sized word out of whatever we've got.
2035 * This suffices even for a 64-bit architecture with a 15-bit rand.
2037 long
2038 get_random (void)
2040 long val = random ();
2041 #if VALBITS > RAND_BITS
2042 val = (val << RAND_BITS) ^ random ();
2043 #if VALBITS > 2*RAND_BITS
2044 val = (val << RAND_BITS) ^ random ();
2045 #if VALBITS > 3*RAND_BITS
2046 val = (val << RAND_BITS) ^ random ();
2047 #if VALBITS > 4*RAND_BITS
2048 val = (val << RAND_BITS) ^ random ();
2049 #endif /* need at least 5 */
2050 #endif /* need at least 4 */
2051 #endif /* need at least 3 */
2052 #endif /* need at least 2 */
2053 return val & ((1L << VALBITS) - 1);
2056 #ifndef HAVE_STRERROR
2057 #ifndef WINDOWSNT
2058 char *
2059 strerror (errnum)
2060 int errnum;
2062 extern char *sys_errlist[];
2063 extern int sys_nerr;
2065 if (errnum >= 0 && errnum < sys_nerr)
2066 return sys_errlist[errnum];
2067 return (char *) "Unknown error";
2069 #endif /* not WINDOWSNT */
2070 #endif /* ! HAVE_STRERROR */
2073 emacs_open (const char *path, int oflag, int mode)
2075 register int rtnval;
2077 while ((rtnval = open (path, oflag, mode)) == -1
2078 && (errno == EINTR))
2079 QUIT;
2080 return (rtnval);
2084 emacs_close (int fd)
2086 int did_retry = 0;
2087 register int rtnval;
2089 while ((rtnval = close (fd)) == -1
2090 && (errno == EINTR))
2091 did_retry = 1;
2093 /* If close is interrupted SunOS 4.1 may or may not have closed the
2094 file descriptor. If it did the second close will fail with
2095 errno = EBADF. That means we have succeeded. */
2096 if (rtnval == -1 && did_retry && errno == EBADF)
2097 return 0;
2099 return rtnval;
2103 emacs_read (int fildes, char *buf, unsigned int nbyte)
2105 register int rtnval;
2107 while ((rtnval = read (fildes, buf, nbyte)) == -1
2108 && (errno == EINTR))
2109 QUIT;
2110 return (rtnval);
2114 emacs_write (int fildes, const char *buf, unsigned int nbyte)
2116 register int rtnval, bytes_written;
2118 bytes_written = 0;
2120 while (nbyte > 0)
2122 rtnval = write (fildes, buf, nbyte);
2124 if (rtnval == -1)
2126 if (errno == EINTR)
2128 #ifdef SYNC_INPUT
2129 /* I originally used `QUIT' but that might causes files to
2130 be truncated if you hit C-g in the middle of it. --Stef */
2131 process_pending_signals ();
2132 #endif
2133 continue;
2135 else
2136 return (bytes_written ? bytes_written : -1);
2139 buf += rtnval;
2140 nbyte -= rtnval;
2141 bytes_written += rtnval;
2143 return (bytes_written);
2146 #ifdef USG
2148 * All of the following are for USG.
2150 * On USG systems the system calls are INTERRUPTIBLE by signals
2151 * that the user program has elected to catch. Thus the system call
2152 * must be retried in these cases. To handle this without massive
2153 * changes in the source code, we remap the standard system call names
2154 * to names for our own functions in sysdep.c that do the system call
2155 * with retries. Actually, for portability reasons, it is good
2156 * programming practice, as this example shows, to limit all actual
2157 * system calls to a single occurrence in the source. Sure, this
2158 * adds an extra level of function call overhead but it is almost
2159 * always negligible. Fred Fish, Unisoft Systems Inc.
2163 * Warning, this function may not duplicate 4.2 action properly
2164 * under error conditions.
2167 #ifndef MAXPATHLEN
2168 /* In 4.1, param.h fails to define this. */
2169 #define MAXPATHLEN 1024
2170 #endif
2172 #ifndef HAVE_GETWD
2174 char *
2175 getwd (char *pathname)
2177 char *npath, *spath;
2178 extern char *getcwd (char *, size_t);
2180 BLOCK_INPUT; /* getcwd uses malloc */
2181 spath = npath = getcwd ((char *) 0, MAXPATHLEN);
2182 if (spath == 0)
2184 UNBLOCK_INPUT;
2185 return spath;
2187 /* On Altos 3068, getcwd can return @hostname/dir, so discard
2188 up to first slash. Should be harmless on other systems. */
2189 while (*npath && *npath != '/')
2190 npath++;
2191 strcpy (pathname, npath);
2192 free (spath); /* getcwd uses malloc */
2193 UNBLOCK_INPUT;
2194 return pathname;
2197 #endif /* HAVE_GETWD */
2200 * Emulate rename using unlink/link. Note that this is
2201 * only partially correct. Also, doesn't enforce restriction
2202 * that files be of same type (regular->regular, dir->dir, etc).
2205 #ifndef HAVE_RENAME
2208 rename (const char *from, const char *to)
2210 if (access (from, 0) == 0)
2212 unlink (to);
2213 if (link (from, to) == 0)
2214 if (unlink (from) == 0)
2215 return (0);
2217 return (-1);
2220 #endif
2223 #if defined(HPUX) && !defined(HAVE_PERROR)
2225 /* HPUX curses library references perror, but as far as we know
2226 it won't be called. Anyway this definition will do for now. */
2228 void
2229 perror (void)
2232 #endif /* HPUX and not HAVE_PERROR */
2234 #ifndef HAVE_DUP2
2237 * Emulate BSD dup2. First close newd if it already exists.
2238 * Then, attempt to dup oldd. If not successful, call dup2 recursively
2239 * until we are, then close the unsuccessful ones.
2243 dup2 (int oldd, int newd)
2245 register int fd, ret;
2247 emacs_close (newd);
2249 #ifdef F_DUPFD
2250 return fcntl (oldd, F_DUPFD, newd);
2251 #else
2252 fd = dup (old);
2253 if (fd == -1)
2254 return -1;
2255 if (fd == new)
2256 return new;
2257 ret = dup2 (old,new);
2258 emacs_close (fd);
2259 return ret;
2260 #endif
2263 #endif /* not HAVE_DUP2 */
2266 * Gettimeofday. Simulate as much as possible. Only accurate
2267 * to nearest second. Emacs doesn't use tzp so ignore it for now.
2268 * Only needed when subprocesses are defined.
2271 #ifndef HAVE_GETTIMEOFDAY
2272 #ifdef HAVE_TIMEVAL
2274 /* ARGSUSED */
2276 gettimeofday (struct timeval *tp, struct timezone *tzp)
2278 extern long time (long);
2280 tp->tv_sec = time ((long *)0);
2281 tp->tv_usec = 0;
2282 if (tzp != 0)
2283 tzp->tz_minuteswest = -1;
2284 return 0;
2287 #endif
2288 #endif /* !HAVE_GETTIMEOFDAY && HAVE_TIMEVAL */
2291 * This function will go away as soon as all the stubs fixed. (fnf)
2294 void
2295 croak (char *badfunc)
2297 printf ("%s not yet implemented\r\n", badfunc);
2298 reset_all_sys_modes ();
2299 exit (1);
2302 #endif /* USG */
2304 /* Directory routines for systems that don't have them. */
2306 #ifdef HAVE_DIRENT_H
2308 #include <dirent.h>
2310 #if !defined (HAVE_CLOSEDIR)
2313 closedir (DIR *dirp /* stream from opendir */)
2315 int rtnval;
2317 rtnval = emacs_close (dirp->dd_fd);
2318 xfree ((char *) dirp);
2320 return rtnval;
2322 #endif /* not HAVE_CLOSEDIR */
2323 #endif /* HAVE_DIRENT_H */
2327 set_file_times (const char *filename, EMACS_TIME atime, EMACS_TIME mtime)
2329 #ifdef HAVE_UTIMES
2330 struct timeval tv[2];
2331 tv[0] = atime;
2332 tv[1] = mtime;
2333 return utimes (filename, tv);
2334 #else /* not HAVE_UTIMES */
2335 struct utimbuf utb;
2336 utb.actime = EMACS_SECS (atime);
2337 utb.modtime = EMACS_SECS (mtime);
2338 return utime (filename, &utb);
2339 #endif /* not HAVE_UTIMES */
2342 /* mkdir and rmdir functions, for systems which don't have them. */
2344 #ifndef HAVE_MKDIR
2346 * Written by Robert Rother, Mariah Corporation, August 1985.
2348 * If you want it, it's yours. All I ask in return is that if you
2349 * figure out how to do this in a Bourne Shell script you send me
2350 * a copy.
2351 * sdcsvax!rmr or rmr@uscd
2353 * Severely hacked over by John Gilmore to make a 4.2BSD compatible
2354 * subroutine. 11Mar86; hoptoad!gnu
2356 * Modified by rmtodd@uokmax 6-28-87 -- when making an already existing dir,
2357 * subroutine didn't return EEXIST. It does now.
2361 * Make a directory.
2364 mkdir (char *dpath, int dmode)
2366 int cpid, status, fd;
2367 struct stat statbuf;
2369 if (stat (dpath, &statbuf) == 0)
2371 errno = EEXIST; /* Stat worked, so it already exists */
2372 return -1;
2375 /* If stat fails for a reason other than non-existence, return error */
2376 if (errno != ENOENT)
2377 return -1;
2379 synch_process_alive = 1;
2380 switch (cpid = fork ())
2383 case -1: /* Error in fork */
2384 return (-1); /* Errno is set already */
2386 case 0: /* Child process */
2388 * Cheap hack to set mode of new directory. Since this
2389 * child process is going away anyway, we zap its umask.
2390 * FIXME, this won't suffice to set SUID, SGID, etc. on this
2391 * directory. Does anybody care?
2393 status = umask (0); /* Get current umask */
2394 status = umask (status | (0777 & ~dmode)); /* Set for mkdir */
2395 fd = emacs_open ("/dev/null", O_RDWR, 0);
2396 if (fd >= 0)
2398 dup2 (fd, 0);
2399 dup2 (fd, 1);
2400 dup2 (fd, 2);
2402 execl ("/bin/mkdir", "mkdir", dpath, (char *) 0);
2403 _exit (-1); /* Can't exec /bin/mkdir */
2405 default: /* Parent process */
2406 wait_for_termination (cpid);
2409 if (synch_process_death != 0 || synch_process_retcode != 0
2410 || synch_process_termsig != 0)
2412 errno = EIO; /* We don't know why, but */
2413 return -1; /* /bin/mkdir failed */
2416 return 0;
2418 #endif /* not HAVE_MKDIR */
2420 #ifndef HAVE_RMDIR
2422 rmdir (char *dpath)
2424 int cpid, status, fd;
2425 struct stat statbuf;
2427 if (stat (dpath, &statbuf) != 0)
2429 /* Stat just set errno. We don't have to */
2430 return -1;
2433 synch_process_alive = 1;
2434 switch (cpid = fork ())
2437 case -1: /* Error in fork */
2438 return (-1); /* Errno is set already */
2440 case 0: /* Child process */
2441 fd = emacs_open ("/dev/null", O_RDWR, 0);
2442 if (fd >= 0)
2444 dup2 (fd, 0);
2445 dup2 (fd, 1);
2446 dup2 (fd, 2);
2448 execl ("/bin/rmdir", "rmdir", dpath, (char *) 0);
2449 _exit (-1); /* Can't exec /bin/rmdir */
2451 default: /* Parent process */
2452 wait_for_termination (cpid);
2455 if (synch_process_death != 0 || synch_process_retcode != 0
2456 || synch_process_termsig != 0)
2458 errno = EIO; /* We don't know why, but */
2459 return -1; /* /bin/rmdir failed */
2462 return 0;
2464 #endif /* !HAVE_RMDIR */
2467 #ifndef HAVE_MEMSET
2468 void *
2469 memset (void *b, int n, size_t length)
2471 unsigned char *p = b;
2472 while (length-- > 0)
2473 *p++ = n;
2474 return b;
2476 #endif /* !HAVE_MEMSET */
2478 #ifndef HAVE_MEMCPY
2479 void *
2480 memcpy (void *b1, void *b2, size_t length)
2482 unsigned char *p1 = b1, *p2 = b2;
2483 while (length-- > 0)
2484 *p1++ = *p2++;
2485 return b1;
2487 #endif /* !HAVE_MEMCPY */
2489 #ifndef HAVE_MEMMOVE
2490 void *
2491 memmove (void *b1, void *b2, size_t length)
2493 unsigned char *p1 = b1, *p2 = b2;
2494 if (p1 < p2 || p1 >= p2 + length)
2495 while (length-- > 0)
2496 *p1++ = *p2++;
2497 else
2499 p1 += length;
2500 p2 += length;
2501 while (length-- > 0)
2502 *--p1 = *--p2;
2504 return b1;
2506 #endif /* !HAVE_MEMCPY */
2508 #ifndef HAVE_MEMCMP
2510 memcmp (void *b1, void *b2, size_t length)
2512 unsigned char *p1 = b1, *p2 = b2;
2513 while (length-- > 0)
2514 if (*p1++ != *p2++)
2515 return p1[-1] < p2[-1] ? -1 : 1;
2516 return 0;
2518 #endif /* !HAVE_MEMCMP */
2520 #ifndef HAVE_STRSIGNAL
2521 char *
2522 strsignal (int code)
2524 char *signame = 0;
2526 if (0 <= code && code < NSIG)
2528 /* Cast to suppress warning if the table has const char *. */
2529 signame = (char *) sys_siglist[code];
2532 return signame;
2534 #endif /* HAVE_STRSIGNAL */
2536 #ifndef DOS_NT
2537 /* For make-serial-process */
2539 serial_open (char *port)
2541 int fd = -1;
2543 fd = emacs_open ((char*) port,
2544 O_RDWR
2545 #ifdef O_NONBLOCK
2546 | O_NONBLOCK
2547 #else
2548 | O_NDELAY
2549 #endif
2550 #ifdef O_NOCTTY
2551 | O_NOCTTY
2552 #endif
2553 , 0);
2554 if (fd < 0)
2556 error ("Could not open %s: %s",
2557 port, emacs_strerror (errno));
2559 #ifdef TIOCEXCL
2560 ioctl (fd, TIOCEXCL, (char *) 0);
2561 #endif
2563 return fd;
2566 #if !defined (HAVE_CFMAKERAW)
2567 /* Workaround for targets which are missing cfmakeraw. */
2568 /* Pasted from man page. */
2569 static void
2570 cfmakeraw (struct termios *termios_p)
2572 termios_p->c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON);
2573 termios_p->c_oflag &= ~OPOST;
2574 termios_p->c_lflag &= ~(ECHO|ECHONL|ICANON|ISIG|IEXTEN);
2575 termios_p->c_cflag &= ~(CSIZE|PARENB);
2576 termios_p->c_cflag |= CS8;
2578 #endif /* !defined (HAVE_CFMAKERAW */
2580 #if !defined (HAVE_CFSETSPEED)
2581 /* Workaround for targets which are missing cfsetspeed. */
2582 static int
2583 cfsetspeed (struct termios *termios_p, speed_t vitesse)
2585 return (cfsetispeed (termios_p, vitesse)
2586 + cfsetospeed (termios_p, vitesse));
2588 #endif
2590 /* For serial-process-configure */
2591 void
2592 serial_configure (struct Lisp_Process *p,
2593 Lisp_Object contact)
2595 Lisp_Object childp2 = Qnil;
2596 Lisp_Object tem = Qnil;
2597 struct termios attr;
2598 int err = -1;
2599 char summary[4] = "???"; /* This usually becomes "8N1". */
2601 childp2 = Fcopy_sequence (p->childp);
2603 /* Read port attributes and prepare default configuration. */
2604 err = tcgetattr (p->outfd, &attr);
2605 if (err != 0)
2606 error ("tcgetattr() failed: %s", emacs_strerror (errno));
2607 cfmakeraw (&attr);
2608 #if defined (CLOCAL)
2609 attr.c_cflag |= CLOCAL;
2610 #endif
2611 #if defined (CREAD)
2612 attr.c_cflag |= CREAD;
2613 #endif
2615 /* Configure speed. */
2616 if (!NILP (Fplist_member (contact, QCspeed)))
2617 tem = Fplist_get (contact, QCspeed);
2618 else
2619 tem = Fplist_get (p->childp, QCspeed);
2620 CHECK_NUMBER (tem);
2621 err = cfsetspeed (&attr, XINT (tem));
2622 if (err != 0)
2623 error ("cfsetspeed(%d) failed: %s", XINT (tem), emacs_strerror (errno));
2624 childp2 = Fplist_put (childp2, QCspeed, tem);
2626 /* Configure bytesize. */
2627 if (!NILP (Fplist_member (contact, QCbytesize)))
2628 tem = Fplist_get (contact, QCbytesize);
2629 else
2630 tem = Fplist_get (p->childp, QCbytesize);
2631 if (NILP (tem))
2632 tem = make_number (8);
2633 CHECK_NUMBER (tem);
2634 if (XINT (tem) != 7 && XINT (tem) != 8)
2635 error (":bytesize must be nil (8), 7, or 8");
2636 summary[0] = XINT (tem) + '0';
2637 #if defined (CSIZE) && defined (CS7) && defined (CS8)
2638 attr.c_cflag &= ~CSIZE;
2639 attr.c_cflag |= ((XINT (tem) == 7) ? CS7 : CS8);
2640 #else
2641 /* Don't error on bytesize 8, which should be set by cfmakeraw. */
2642 if (XINT (tem) != 8)
2643 error ("Bytesize cannot be changed");
2644 #endif
2645 childp2 = Fplist_put (childp2, QCbytesize, tem);
2647 /* Configure parity. */
2648 if (!NILP (Fplist_member (contact, QCparity)))
2649 tem = Fplist_get (contact, QCparity);
2650 else
2651 tem = Fplist_get (p->childp, QCparity);
2652 if (!NILP (tem) && !EQ (tem, Qeven) && !EQ (tem, Qodd))
2653 error (":parity must be nil (no parity), `even', or `odd'");
2654 #if defined (PARENB) && defined (PARODD) && defined (IGNPAR) && defined (INPCK)
2655 attr.c_cflag &= ~(PARENB | PARODD);
2656 attr.c_iflag &= ~(IGNPAR | INPCK);
2657 if (NILP (tem))
2659 summary[1] = 'N';
2661 else if (EQ (tem, Qeven))
2663 summary[1] = 'E';
2664 attr.c_cflag |= PARENB;
2665 attr.c_iflag |= (IGNPAR | INPCK);
2667 else if (EQ (tem, Qodd))
2669 summary[1] = 'O';
2670 attr.c_cflag |= (PARENB | PARODD);
2671 attr.c_iflag |= (IGNPAR | INPCK);
2673 #else
2674 /* Don't error on no parity, which should be set by cfmakeraw. */
2675 if (!NILP (tem))
2676 error ("Parity cannot be configured");
2677 #endif
2678 childp2 = Fplist_put (childp2, QCparity, tem);
2680 /* Configure stopbits. */
2681 if (!NILP (Fplist_member (contact, QCstopbits)))
2682 tem = Fplist_get (contact, QCstopbits);
2683 else
2684 tem = Fplist_get (p->childp, QCstopbits);
2685 if (NILP (tem))
2686 tem = make_number (1);
2687 CHECK_NUMBER (tem);
2688 if (XINT (tem) != 1 && XINT (tem) != 2)
2689 error (":stopbits must be nil (1 stopbit), 1, or 2");
2690 summary[2] = XINT (tem) + '0';
2691 #if defined (CSTOPB)
2692 attr.c_cflag &= ~CSTOPB;
2693 if (XINT (tem) == 2)
2694 attr.c_cflag |= CSTOPB;
2695 #else
2696 /* Don't error on 1 stopbit, which should be set by cfmakeraw. */
2697 if (XINT (tem) != 1)
2698 error ("Stopbits cannot be configured");
2699 #endif
2700 childp2 = Fplist_put (childp2, QCstopbits, tem);
2702 /* Configure flowcontrol. */
2703 if (!NILP (Fplist_member (contact, QCflowcontrol)))
2704 tem = Fplist_get (contact, QCflowcontrol);
2705 else
2706 tem = Fplist_get (p->childp, QCflowcontrol);
2707 if (!NILP (tem) && !EQ (tem, Qhw) && !EQ (tem, Qsw))
2708 error (":flowcontrol must be nil (no flowcontrol), `hw', or `sw'");
2709 #if defined (CRTSCTS)
2710 attr.c_cflag &= ~CRTSCTS;
2711 #endif
2712 #if defined (CNEW_RTSCTS)
2713 attr.c_cflag &= ~CNEW_RTSCTS;
2714 #endif
2715 #if defined (IXON) && defined (IXOFF)
2716 attr.c_iflag &= ~(IXON | IXOFF);
2717 #endif
2718 if (NILP (tem))
2720 /* Already configured. */
2722 else if (EQ (tem, Qhw))
2724 #if defined (CRTSCTS)
2725 attr.c_cflag |= CRTSCTS;
2726 #elif defined (CNEW_RTSCTS)
2727 attr.c_cflag |= CNEW_RTSCTS;
2728 #else
2729 error ("Hardware flowcontrol (RTS/CTS) not supported");
2730 #endif
2732 else if (EQ (tem, Qsw))
2734 #if defined (IXON) && defined (IXOFF)
2735 attr.c_iflag |= (IXON | IXOFF);
2736 #else
2737 error ("Software flowcontrol (XON/XOFF) not supported");
2738 #endif
2740 childp2 = Fplist_put (childp2, QCflowcontrol, tem);
2742 /* Activate configuration. */
2743 err = tcsetattr (p->outfd, TCSANOW, &attr);
2744 if (err != 0)
2745 error ("tcsetattr() failed: %s", emacs_strerror (errno));
2747 childp2 = Fplist_put (childp2, QCsummary, build_string (summary));
2748 p->childp = childp2;
2751 #endif /* not DOS_NT */
2753 /* System depended enumeration of and access to system processes a-la ps(1). */
2755 #ifdef HAVE_PROCFS
2757 /* Process enumeration and access via /proc. */
2759 Lisp_Object
2760 list_system_processes (void)
2762 Lisp_Object procdir, match, proclist, next;
2763 struct gcpro gcpro1, gcpro2;
2764 register Lisp_Object tail;
2766 GCPRO2 (procdir, match);
2767 /* For every process on the system, there's a directory in the
2768 "/proc" pseudo-directory whose name is the numeric ID of that
2769 process. */
2770 procdir = build_string ("/proc");
2771 match = build_string ("[0-9]+");
2772 proclist = directory_files_internal (procdir, Qnil, match, Qt, 0, Qnil);
2774 /* `proclist' gives process IDs as strings. Destructively convert
2775 each string into a number. */
2776 for (tail = proclist; CONSP (tail); tail = next)
2778 next = XCDR (tail);
2779 XSETCAR (tail, Fstring_to_number (XCAR (tail), Qnil));
2781 UNGCPRO;
2783 /* directory_files_internal returns the files in reverse order; undo
2784 that. */
2785 proclist = Fnreverse (proclist);
2786 return proclist;
2789 /* The WINDOWSNT implementation is in w32.c.
2790 The MSDOS implementation is in dosfns.c. */
2791 #elif !defined (WINDOWSNT) && !defined (MSDOS)
2793 Lisp_Object
2794 list_system_processes (void)
2796 return Qnil;
2799 #endif /* !defined (WINDOWSNT) */
2801 #ifdef GNU_LINUX
2802 static void
2803 time_from_jiffies (unsigned long long tval, long hz,
2804 time_t *sec, unsigned *usec)
2806 unsigned long long ullsec;
2808 *sec = tval / hz;
2809 ullsec = *sec;
2810 tval -= ullsec * hz;
2811 /* Careful: if HZ > 1 million, then integer division by it yields zero. */
2812 if (hz <= 1000000)
2813 *usec = tval * 1000000 / hz;
2814 else
2815 *usec = tval / (hz / 1000000);
2818 static Lisp_Object
2819 ltime_from_jiffies (unsigned long long tval, long hz)
2821 time_t sec;
2822 unsigned usec;
2824 time_from_jiffies (tval, hz, &sec, &usec);
2826 return list3 (make_number ((sec >> 16) & 0xffff),
2827 make_number (sec & 0xffff),
2828 make_number (usec));
2831 static void
2832 get_up_time (time_t *sec, unsigned *usec)
2834 FILE *fup;
2836 *sec = *usec = 0;
2838 BLOCK_INPUT;
2839 fup = fopen ("/proc/uptime", "r");
2841 if (fup)
2843 double uptime, idletime;
2845 /* The numbers in /proc/uptime use C-locale decimal point, but
2846 we already set ourselves to the C locale (see `fixup_locale'
2847 in emacs.c). */
2848 if (2 <= fscanf (fup, "%lf %lf", &uptime, &idletime))
2850 *sec = uptime;
2851 *usec = (uptime - *sec) * 1000000;
2853 fclose (fup);
2855 UNBLOCK_INPUT;
2858 #define MAJOR(d) (((unsigned)(d) >> 8) & 0xfff)
2859 #define MINOR(d) (((unsigned)(d) & 0xff) | (((unsigned)(d) & 0xfff00000) >> 12))
2861 static Lisp_Object
2862 procfs_ttyname (int rdev)
2864 FILE *fdev = NULL;
2865 char name[PATH_MAX];
2867 BLOCK_INPUT;
2868 fdev = fopen ("/proc/tty/drivers", "r");
2870 if (fdev)
2872 unsigned major;
2873 unsigned long minor_beg, minor_end;
2874 char minor[25]; /* 2 32-bit numbers + dash */
2875 char *endp;
2877 while (!feof (fdev) && !ferror (fdev))
2879 if (3 <= fscanf (fdev, "%*s %s %u %s %*s\n", name, &major, minor)
2880 && major == MAJOR (rdev))
2882 minor_beg = strtoul (minor, &endp, 0);
2883 if (*endp == '\0')
2884 minor_end = minor_beg;
2885 else if (*endp == '-')
2886 minor_end = strtoul (endp + 1, &endp, 0);
2887 else
2888 continue;
2890 if (MINOR (rdev) >= minor_beg && MINOR (rdev) <= minor_end)
2892 sprintf (name + strlen (name), "%u", MINOR (rdev));
2893 break;
2897 fclose (fdev);
2899 UNBLOCK_INPUT;
2900 return build_string (name);
2903 static unsigned long
2904 procfs_get_total_memory (void)
2906 FILE *fmem = NULL;
2907 unsigned long retval = 2 * 1024 * 1024; /* default: 2GB */
2909 BLOCK_INPUT;
2910 fmem = fopen ("/proc/meminfo", "r");
2912 if (fmem)
2914 unsigned long entry_value;
2915 char entry_name[20]; /* the longest I saw is 13+1 */
2917 while (!feof (fmem) && !ferror (fmem))
2919 if (2 <= fscanf (fmem, "%s %lu kB\n", entry_name, &entry_value)
2920 && strcmp (entry_name, "MemTotal:") == 0)
2922 retval = entry_value;
2923 break;
2926 fclose (fmem);
2928 UNBLOCK_INPUT;
2929 return retval;
2932 Lisp_Object
2933 system_process_attributes (Lisp_Object pid)
2935 char procfn[PATH_MAX], fn[PATH_MAX];
2936 struct stat st;
2937 struct passwd *pw;
2938 struct group *gr;
2939 long clocks_per_sec;
2940 char *procfn_end;
2941 char procbuf[1025], *p, *q;
2942 int fd;
2943 ssize_t nread;
2944 const char *cmd = NULL;
2945 char *cmdline = NULL;
2946 size_t cmdsize = 0, cmdline_size;
2947 unsigned char c;
2948 int proc_id, ppid, uid, gid, pgrp, sess, tty, tpgid, thcount;
2949 unsigned long long utime, stime, cutime, cstime, start;
2950 long priority, nice, rss;
2951 unsigned long minflt, majflt, cminflt, cmajflt, vsize;
2952 time_t sec;
2953 unsigned usec;
2954 EMACS_TIME tnow, tstart, tboot, telapsed;
2955 double pcpu, pmem;
2956 Lisp_Object attrs = Qnil;
2957 Lisp_Object cmd_str, decoded_cmd, tem;
2958 struct gcpro gcpro1, gcpro2;
2959 EMACS_INT uid_eint, gid_eint;
2961 CHECK_NUMBER_OR_FLOAT (pid);
2962 proc_id = FLOATP (pid) ? XFLOAT_DATA (pid) : XINT (pid);
2963 sprintf (procfn, "/proc/%u", proc_id);
2964 if (stat (procfn, &st) < 0)
2965 return attrs;
2967 GCPRO2 (attrs, decoded_cmd);
2969 /* euid egid */
2970 uid = st.st_uid;
2971 /* Use of EMACS_INT stops GCC whining about limited range of data type. */
2972 uid_eint = uid;
2973 attrs = Fcons (Fcons (Qeuid, make_fixnum_or_float (uid_eint)), attrs);
2974 BLOCK_INPUT;
2975 pw = getpwuid (uid);
2976 UNBLOCK_INPUT;
2977 if (pw)
2978 attrs = Fcons (Fcons (Quser, build_string (pw->pw_name)), attrs);
2980 gid = st.st_gid;
2981 gid_eint = gid;
2982 attrs = Fcons (Fcons (Qegid, make_fixnum_or_float (gid_eint)), attrs);
2983 BLOCK_INPUT;
2984 gr = getgrgid (gid);
2985 UNBLOCK_INPUT;
2986 if (gr)
2987 attrs = Fcons (Fcons (Qgroup, build_string (gr->gr_name)), attrs);
2989 strcpy (fn, procfn);
2990 procfn_end = fn + strlen (fn);
2991 strcpy (procfn_end, "/stat");
2992 fd = emacs_open (fn, O_RDONLY, 0);
2993 if (fd >= 0 && (nread = emacs_read (fd, procbuf, sizeof (procbuf) - 1)) > 0)
2995 procbuf[nread] = '\0';
2996 p = procbuf;
2998 p = strchr (p, '(');
2999 if (p != NULL)
3001 q = strrchr (p + 1, ')');
3002 /* comm */
3003 if (q != NULL)
3005 cmd = p + 1;
3006 cmdsize = q - cmd;
3009 else
3010 q = NULL;
3011 if (cmd == NULL)
3013 cmd = "???";
3014 cmdsize = 3;
3016 /* Command name is encoded in locale-coding-system; decode it. */
3017 cmd_str = make_unibyte_string (cmd, cmdsize);
3018 decoded_cmd = code_convert_string_norecord (cmd_str,
3019 Vlocale_coding_system, 0);
3020 attrs = Fcons (Fcons (Qcomm, decoded_cmd), attrs);
3022 if (q)
3024 EMACS_INT ppid_eint, pgrp_eint, sess_eint, tpgid_eint, thcount_eint;
3025 p = q + 2;
3026 /* state ppid pgrp sess tty tpgid . minflt cminflt majflt cmajflt utime stime cutime cstime priority nice thcount . start vsize rss */
3027 sscanf (p, "%c %d %d %d %d %d %*u %lu %lu %lu %lu %Lu %Lu %Lu %Lu %ld %ld %d %*d %Lu %lu %ld",
3028 &c, &ppid, &pgrp, &sess, &tty, &tpgid,
3029 &minflt, &cminflt, &majflt, &cmajflt,
3030 &utime, &stime, &cutime, &cstime,
3031 &priority, &nice, &thcount, &start, &vsize, &rss);
3033 char state_str[2];
3035 state_str[0] = c;
3036 state_str[1] = '\0';
3037 tem = build_string (state_str);
3038 attrs = Fcons (Fcons (Qstate, tem), attrs);
3040 /* Stops GCC whining about limited range of data type. */
3041 ppid_eint = ppid;
3042 pgrp_eint = pgrp;
3043 sess_eint = sess;
3044 tpgid_eint = tpgid;
3045 thcount_eint = thcount;
3046 attrs = Fcons (Fcons (Qppid, make_fixnum_or_float (ppid_eint)), attrs);
3047 attrs = Fcons (Fcons (Qpgrp, make_fixnum_or_float (pgrp_eint)), attrs);
3048 attrs = Fcons (Fcons (Qsess, make_fixnum_or_float (sess_eint)), attrs);
3049 attrs = Fcons (Fcons (Qttname, procfs_ttyname (tty)), attrs);
3050 attrs = Fcons (Fcons (Qtpgid, make_fixnum_or_float (tpgid_eint)), attrs);
3051 attrs = Fcons (Fcons (Qminflt, make_fixnum_or_float (minflt)), attrs);
3052 attrs = Fcons (Fcons (Qmajflt, make_fixnum_or_float (majflt)), attrs);
3053 attrs = Fcons (Fcons (Qcminflt, make_fixnum_or_float (cminflt)), attrs);
3054 attrs = Fcons (Fcons (Qcmajflt, make_fixnum_or_float (cmajflt)), attrs);
3055 clocks_per_sec = sysconf (_SC_CLK_TCK);
3056 if (clocks_per_sec < 0)
3057 clocks_per_sec = 100;
3058 attrs = Fcons (Fcons (Qutime,
3059 ltime_from_jiffies (utime, clocks_per_sec)),
3060 attrs);
3061 attrs = Fcons (Fcons (Qstime,
3062 ltime_from_jiffies (stime, clocks_per_sec)),
3063 attrs);
3064 attrs = Fcons (Fcons (Qtime,
3065 ltime_from_jiffies (stime+utime, clocks_per_sec)),
3066 attrs);
3067 attrs = Fcons (Fcons (Qcutime,
3068 ltime_from_jiffies (cutime, clocks_per_sec)),
3069 attrs);
3070 attrs = Fcons (Fcons (Qcstime,
3071 ltime_from_jiffies (cstime, clocks_per_sec)),
3072 attrs);
3073 attrs = Fcons (Fcons (Qctime,
3074 ltime_from_jiffies (cstime+cutime, clocks_per_sec)),
3075 attrs);
3076 attrs = Fcons (Fcons (Qpri, make_number (priority)), attrs);
3077 attrs = Fcons (Fcons (Qnice, make_number (nice)), attrs);
3078 attrs = Fcons (Fcons (Qthcount, make_fixnum_or_float (thcount_eint)), attrs);
3079 EMACS_GET_TIME (tnow);
3080 get_up_time (&sec, &usec);
3081 EMACS_SET_SECS (telapsed, sec);
3082 EMACS_SET_USECS (telapsed, usec);
3083 EMACS_SUB_TIME (tboot, tnow, telapsed);
3084 time_from_jiffies (start, clocks_per_sec, &sec, &usec);
3085 EMACS_SET_SECS (tstart, sec);
3086 EMACS_SET_USECS (tstart, usec);
3087 EMACS_ADD_TIME (tstart, tboot, tstart);
3088 attrs = Fcons (Fcons (Qstart,
3089 list3 (make_number
3090 ((EMACS_SECS (tstart) >> 16) & 0xffff),
3091 make_number
3092 (EMACS_SECS (tstart) & 0xffff),
3093 make_number
3094 (EMACS_USECS (tstart)))),
3095 attrs);
3096 attrs = Fcons (Fcons (Qvsize, make_fixnum_or_float (vsize/1024)), attrs);
3097 attrs = Fcons (Fcons (Qrss, make_fixnum_or_float (4*rss)), attrs);
3098 EMACS_SUB_TIME (telapsed, tnow, tstart);
3099 attrs = Fcons (Fcons (Qetime,
3100 list3 (make_number
3101 ((EMACS_SECS (telapsed) >> 16) & 0xffff),
3102 make_number
3103 (EMACS_SECS (telapsed) & 0xffff),
3104 make_number
3105 (EMACS_USECS (telapsed)))),
3106 attrs);
3107 time_from_jiffies (utime + stime, clocks_per_sec, &sec, &usec);
3108 pcpu = (sec + usec / 1000000.0) / (EMACS_SECS (telapsed) + EMACS_USECS (telapsed) / 1000000.0);
3109 if (pcpu > 1.0)
3110 pcpu = 1.0;
3111 attrs = Fcons (Fcons (Qpcpu, make_float (100 * pcpu)), attrs);
3112 pmem = 4.0 * 100 * rss / procfs_get_total_memory ();
3113 if (pmem > 100)
3114 pmem = 100;
3115 attrs = Fcons (Fcons (Qpmem, make_float (pmem)), attrs);
3118 if (fd >= 0)
3119 emacs_close (fd);
3121 /* args */
3122 strcpy (procfn_end, "/cmdline");
3123 fd = emacs_open (fn, O_RDONLY, 0);
3124 if (fd >= 0)
3126 for (cmdline_size = 0; emacs_read (fd, &c, 1) == 1; cmdline_size++)
3128 if (isspace (c) || c == '\\')
3129 cmdline_size++; /* for later quoting, see below */
3131 if (cmdline_size)
3133 cmdline = xmalloc (cmdline_size + 1);
3134 lseek (fd, 0L, SEEK_SET);
3135 cmdline[0] = '\0';
3136 if ((nread = read (fd, cmdline, cmdline_size)) >= 0)
3137 cmdline[nread++] = '\0';
3138 else
3140 /* Assigning zero to `nread' makes us skip the following
3141 two loops, assign zero to cmdline_size, and enter the
3142 following `if' clause that handles unknown command
3143 lines. */
3144 nread = 0;
3146 /* We don't want trailing null characters. */
3147 for (p = cmdline + nread - 1; p > cmdline && !*p; p--)
3148 nread--;
3149 for (p = cmdline; p < cmdline + nread; p++)
3151 /* Escape-quote whitespace and backslashes. */
3152 if (isspace (*p) || *p == '\\')
3154 memmove (p + 1, p, nread - (p - cmdline));
3155 nread++;
3156 *p++ = '\\';
3158 else if (*p == '\0')
3159 *p = ' ';
3161 cmdline_size = nread;
3163 if (!cmdline_size)
3165 if (!cmd)
3166 cmd = "???";
3167 if (!cmdsize)
3168 cmdsize = strlen (cmd);
3169 cmdline_size = cmdsize + 2;
3170 cmdline = xmalloc (cmdline_size + 1);
3171 strcpy (cmdline, "[");
3172 strcat (strncat (cmdline, cmd, cmdsize), "]");
3174 emacs_close (fd);
3175 /* Command line is encoded in locale-coding-system; decode it. */
3176 cmd_str = make_unibyte_string (cmdline, cmdline_size);
3177 decoded_cmd = code_convert_string_norecord (cmd_str,
3178 Vlocale_coding_system, 0);
3179 xfree (cmdline);
3180 attrs = Fcons (Fcons (Qargs, decoded_cmd), attrs);
3183 UNGCPRO;
3184 return attrs;
3187 #elif defined (SOLARIS2) && defined (HAVE_PROCFS)
3189 /* The <procfs.h> header does not like to be included if _LP64 is defined and
3190 __FILE_OFFSET_BITS == 64. This is an ugly workaround that. */
3191 #if !defined (_LP64) && defined (_FILE_OFFSET_BITS) && (_FILE_OFFSET_BITS == 64)
3192 #define PROCFS_FILE_OFFSET_BITS_HACK 1
3193 #undef _FILE_OFFSET_BITS
3194 #else
3195 #define PROCFS_FILE_OFFSET_BITS_HACK 0
3196 #endif
3198 #include <procfs.h>
3200 #if PROCFS_FILE_OFFSET_BITS_HACK == 1
3201 #define _FILE_OFFSET_BITS 64
3202 #endif /* PROCFS_FILE_OFFSET_BITS_HACK == 1 */
3204 Lisp_Object
3205 system_process_attributes (Lisp_Object pid)
3207 char procfn[PATH_MAX], fn[PATH_MAX];
3208 struct stat st;
3209 struct passwd *pw;
3210 struct group *gr;
3211 char *procfn_end;
3212 struct psinfo pinfo;
3213 int fd;
3214 ssize_t nread;
3215 int proc_id, uid, gid;
3216 Lisp_Object attrs = Qnil;
3217 Lisp_Object decoded_cmd, tem;
3218 struct gcpro gcpro1, gcpro2;
3219 EMACS_INT uid_eint, gid_eint;
3221 CHECK_NUMBER_OR_FLOAT (pid);
3222 proc_id = FLOATP (pid) ? XFLOAT_DATA (pid) : XINT (pid);
3223 sprintf (procfn, "/proc/%u", proc_id);
3224 if (stat (procfn, &st) < 0)
3225 return attrs;
3227 GCPRO2 (attrs, decoded_cmd);
3229 /* euid egid */
3230 uid = st.st_uid;
3231 /* Use of EMACS_INT stops GCC whining about limited range of data type. */
3232 uid_eint = uid;
3233 attrs = Fcons (Fcons (Qeuid, make_fixnum_or_float (uid_eint)), attrs);
3234 BLOCK_INPUT;
3235 pw = getpwuid (uid);
3236 UNBLOCK_INPUT;
3237 if (pw)
3238 attrs = Fcons (Fcons (Quser, build_string (pw->pw_name)), attrs);
3240 gid = st.st_gid;
3241 gid_eint = gid;
3242 attrs = Fcons (Fcons (Qegid, make_fixnum_or_float (gid_eint)), attrs);
3243 BLOCK_INPUT;
3244 gr = getgrgid (gid);
3245 UNBLOCK_INPUT;
3246 if (gr)
3247 attrs = Fcons (Fcons (Qgroup, build_string (gr->gr_name)), attrs);
3249 strcpy (fn, procfn);
3250 procfn_end = fn + strlen (fn);
3251 strcpy (procfn_end, "/psinfo");
3252 fd = emacs_open (fn, O_RDONLY, 0);
3253 if (fd >= 0
3254 && (nread = read (fd, (char*)&pinfo, sizeof (struct psinfo)) > 0))
3256 attrs = Fcons (Fcons (Qppid, make_fixnum_or_float (pinfo.pr_ppid)), attrs);
3257 attrs = Fcons (Fcons (Qpgrp, make_fixnum_or_float (pinfo.pr_pgid)), attrs);
3258 attrs = Fcons (Fcons (Qsess, make_fixnum_or_float (pinfo.pr_sid)), attrs);
3261 char state_str[2];
3262 state_str[0] = pinfo.pr_lwp.pr_sname;
3263 state_str[1] = '\0';
3264 tem = build_string (state_str);
3265 attrs = Fcons (Fcons (Qstate, tem), attrs);
3268 /* FIXME: missing Qttyname. psinfo.pr_ttydev is a dev_t,
3269 need to get a string from it. */
3271 /* FIXME: missing: Qtpgid */
3273 /* FIXME: missing:
3274 Qminflt
3275 Qmajflt
3276 Qcminflt
3277 Qcmajflt
3279 Qutime
3280 Qcutime
3281 Qstime
3282 Qcstime
3283 Are they available? */
3285 attrs = Fcons (Fcons (Qtime,
3286 list3 (make_number (pinfo.pr_time.tv_sec >> 16),
3287 make_number (pinfo.pr_time.tv_sec & 0xffff),
3288 make_number (pinfo.pr_time.tv_nsec))),
3289 attrs);
3291 attrs = Fcons (Fcons (Qctime,
3292 list3 (make_number (pinfo.pr_ctime.tv_sec >> 16),
3293 make_number (pinfo.pr_ctime.tv_sec & 0xffff),
3294 make_number (pinfo.pr_ctime.tv_nsec))),
3295 attrs);
3297 attrs = Fcons (Fcons (Qpri, make_number (pinfo.pr_lwp.pr_pri)), attrs);
3298 attrs = Fcons (Fcons (Qnice, make_number (pinfo.pr_lwp.pr_nice)), attrs);
3299 attrs = Fcons (Fcons (Qthcount, make_fixnum_or_float (pinfo.pr_nlwp)), attrs);
3301 attrs = Fcons (Fcons (Qstart,
3302 list3 (make_number (pinfo.pr_start.tv_sec >> 16),
3303 make_number (pinfo.pr_start.tv_sec & 0xffff),
3304 make_number (pinfo.pr_start.tv_nsec))),
3305 attrs);
3306 attrs = Fcons (Fcons (Qvsize, make_fixnum_or_float (pinfo.pr_size)), attrs);
3307 attrs = Fcons (Fcons (Qrss, make_fixnum_or_float (pinfo.pr_rssize)), attrs);
3309 /* pr_pctcpu and pr_pctmem are encoded as a fixed point 16 bit number in [0 ... 1]. */
3310 attrs = Fcons (Fcons (Qpcpu, (pinfo.pr_pctcpu * 100.0) / (double)0x8000), attrs);
3311 attrs = Fcons (Fcons (Qpmem, (pinfo.pr_pctmem * 100.0) / (double)0x8000), attrs);
3313 decoded_cmd
3314 = code_convert_string_norecord (make_unibyte_string (pinfo.pr_fname,
3315 strlen (pinfo.pr_fname)),
3316 Vlocale_coding_system, 0);
3317 attrs = Fcons (Fcons (Qcomm, decoded_cmd), attrs);
3318 decoded_cmd
3319 = code_convert_string_norecord (make_unibyte_string (pinfo.pr_psargs,
3320 strlen (pinfo.pr_psargs)),
3321 Vlocale_coding_system, 0);
3322 attrs = Fcons (Fcons (Qargs, decoded_cmd), attrs);
3325 if (fd >= 0)
3326 emacs_close (fd);
3328 UNGCPRO;
3329 return attrs;
3332 /* The WINDOWSNT implementation is in w32.c.
3333 The MSDOS implementation is in dosfns.c. */
3334 #elif !defined (WINDOWSNT) && !defined (MSDOS)
3336 Lisp_Object
3337 system_process_attributes (Lisp_Object pid)
3339 return Qnil;
3342 #endif /* !defined (WINDOWSNT) */
3345 /* arch-tag: edb43589-4e09-4544-b325-978b5b121dcf
3346 (do not change this comment) */