Fix typos.
[emacs.git] / src / sysdep.c
blobd666f8dbb79bf3d0e031542b4cdde5eb1d1232f7
1 /* Interfaces to system-dependent kernel and library entries.
2 Copyright (C) 1985-1988, 1993-1995, 1999-2011
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/>. */
20 #include <config.h>
21 #include <ctype.h>
22 #include <signal.h>
23 #include <stdio.h>
24 #include <setjmp.h>
25 #ifdef HAVE_PWD_H
26 #include <pwd.h>
27 #include <grp.h>
28 #endif /* HAVE_PWD_H */
29 #include <limits.h>
30 #include <unistd.h>
32 #include <allocator.h>
33 #include <careadlinkat.h>
34 #include <ignore-value.h>
36 #include "lisp.h"
37 #include "sysselect.h"
38 #include "blockinput.h"
40 #ifdef WINDOWSNT
41 #define read sys_read
42 #define write sys_write
43 #include <windows.h>
44 #ifndef NULL
45 #define NULL 0
46 #endif
47 #endif /* not WINDOWSNT */
49 #include <sys/types.h>
50 #include <sys/stat.h>
51 #include <errno.h>
53 #ifdef HAVE_SETPGID
54 #if !defined (USG)
55 #undef setpgrp
56 #define setpgrp setpgid
57 #endif
58 #endif
60 /* Get SI_SRPC_DOMAIN, if it is available. */
61 #ifdef HAVE_SYS_SYSTEMINFO_H
62 #include <sys/systeminfo.h>
63 #endif
65 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida, MW Aug 1993 */
66 #include <dos.h>
67 #include "dosfns.h"
68 #include "msdos.h"
69 #include <sys/param.h>
70 #endif
72 #include <sys/file.h>
73 #include <fcntl.h>
75 #include "systty.h"
76 #include "syswait.h"
78 #ifdef HAVE_SYS_UTSNAME_H
79 #include <sys/utsname.h>
80 #include <memory.h>
81 #endif /* HAVE_SYS_UTSNAME_H */
83 #include "keyboard.h"
84 #include "frame.h"
85 #include "window.h"
86 #include "termhooks.h"
87 #include "termchar.h"
88 #include "termopts.h"
89 #include "dispextern.h"
90 #include "process.h"
91 #include "cm.h" /* for reset_sys_modes */
93 #ifdef WINDOWSNT
94 #include <direct.h>
95 /* In process.h which conflicts with the local copy. */
96 #define _P_WAIT 0
97 int _cdecl _spawnlp (int, const char *, const char *, ...);
98 int _cdecl _getpid (void);
99 extern char *getwd (char *);
100 #endif
102 #include "syssignal.h"
103 #include "systime.h"
104 #ifdef HAVE_UTIME_H
105 #include <utime.h>
106 #endif
108 #ifndef HAVE_UTIMES
109 #ifndef HAVE_STRUCT_UTIMBUF
110 /* We want to use utime rather than utimes, but we couldn't find the
111 structure declaration. We'll use the traditional one. */
112 struct utimbuf {
113 long actime;
114 long modtime;
116 #endif
117 #endif
119 static int emacs_get_tty (int, struct emacs_tty *);
120 static int emacs_set_tty (int, struct emacs_tty *, int);
121 #if defined TIOCNOTTY || defined USG5 || defined CYGWIN
122 static void croak (char *) NO_RETURN;
123 #endif
125 /* Declare here, including term.h is problematic on some systems. */
126 extern void tputs (const char *, int, int (*)(int));
128 static const int baud_convert[] =
130 0, 50, 75, 110, 135, 150, 200, 300, 600, 1200,
131 1800, 2400, 4800, 9600, 19200, 38400
135 #if !defined (HAVE_GET_CURRENT_DIR_NAME) || defined (BROKEN_GET_CURRENT_DIR_NAME)
137 /* Return the current working directory. Returns NULL on errors.
138 Any other returned value must be freed with free. This is used
139 only when get_current_dir_name is not defined on the system. */
140 char*
141 get_current_dir_name (void)
143 char *buf;
144 char *pwd;
145 struct stat dotstat, pwdstat;
146 /* If PWD is accurate, use it instead of calling getwd. PWD is
147 sometimes a nicer name, and using it may avoid a fatal error if a
148 parent directory is searchable but not readable. */
149 if ((pwd = getenv ("PWD")) != 0
150 && (IS_DIRECTORY_SEP (*pwd) || (*pwd && IS_DEVICE_SEP (pwd[1])))
151 && stat (pwd, &pwdstat) == 0
152 && stat (".", &dotstat) == 0
153 && dotstat.st_ino == pwdstat.st_ino
154 && dotstat.st_dev == pwdstat.st_dev
155 #ifdef MAXPATHLEN
156 && strlen (pwd) < MAXPATHLEN
157 #endif
160 buf = (char *) malloc (strlen (pwd) + 1);
161 if (!buf)
162 return NULL;
163 strcpy (buf, pwd);
165 #ifdef HAVE_GETCWD
166 else
168 size_t buf_size = 1024;
169 buf = (char *) malloc (buf_size);
170 if (!buf)
171 return NULL;
172 for (;;)
174 if (getcwd (buf, buf_size) == buf)
175 break;
176 if (errno != ERANGE)
178 int tmp_errno = errno;
179 free (buf);
180 errno = tmp_errno;
181 return NULL;
183 buf_size *= 2;
184 buf = (char *) realloc (buf, buf_size);
185 if (!buf)
186 return NULL;
189 #else
190 else
192 /* We need MAXPATHLEN here. */
193 buf = (char *) malloc (MAXPATHLEN + 1);
194 if (!buf)
195 return NULL;
196 if (getwd (buf) == NULL)
198 int tmp_errno = errno;
199 free (buf);
200 errno = tmp_errno;
201 return NULL;
204 #endif
205 return buf;
207 #endif
210 /* Discard pending input on all input descriptors. */
212 void
213 discard_tty_input (void)
215 #ifndef WINDOWSNT
216 struct emacs_tty buf;
218 if (noninteractive)
219 return;
221 #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */
222 while (dos_keyread () != -1)
224 #else /* not MSDOS */
226 struct tty_display_info *tty;
227 for (tty = tty_list; tty; tty = tty->next)
229 if (tty->input) /* Is the device suspended? */
231 emacs_get_tty (fileno (tty->input), &buf);
232 emacs_set_tty (fileno (tty->input), &buf, 0);
236 #endif /* not MSDOS */
237 #endif /* not WINDOWSNT */
241 #ifdef SIGTSTP
243 /* Arrange for character C to be read as the next input from
244 the terminal.
245 XXX What if we have multiple ttys?
248 void
249 stuff_char (char c)
251 if (! FRAME_TERMCAP_P (SELECTED_FRAME ()))
252 return;
254 /* Should perhaps error if in batch mode */
255 #ifdef TIOCSTI
256 ioctl (fileno (CURTTY()->input), TIOCSTI, &c);
257 #else /* no TIOCSTI */
258 error ("Cannot stuff terminal input characters in this version of Unix");
259 #endif /* no TIOCSTI */
262 #endif /* SIGTSTP */
264 void
265 init_baud_rate (int fd)
267 int emacs_ospeed;
269 if (noninteractive)
270 emacs_ospeed = 0;
271 else
273 #ifdef DOS_NT
274 emacs_ospeed = 15;
275 #else /* not DOS_NT */
276 struct termios sg;
278 sg.c_cflag = B9600;
279 tcgetattr (fd, &sg);
280 emacs_ospeed = cfgetospeed (&sg);
281 #endif /* not DOS_NT */
284 baud_rate = (emacs_ospeed < sizeof baud_convert / sizeof baud_convert[0]
285 ? baud_convert[emacs_ospeed] : 9600);
286 if (baud_rate == 0)
287 baud_rate = 1200;
292 /* Set nonzero to make following function work under dbx
293 (at least for bsd). */
294 int wait_debugging EXTERNALLY_VISIBLE;
296 #ifndef MSDOS
298 static void
299 wait_for_termination_1 (int pid, int interruptible)
301 while (1)
303 #if (defined (BSD_SYSTEM) || defined (HPUX)) && !defined (__GNU__)
304 /* Note that kill returns -1 even if the process is just a zombie now.
305 But inevitably a SIGCHLD interrupt should be generated
306 and child_sig will do wait3 and make the process go away. */
307 /* There is some indication that there is a bug involved with
308 termination of subprocesses, perhaps involving a kernel bug too,
309 but no idea what it is. Just as a hunch we signal SIGCHLD to see
310 if that causes the problem to go away or get worse. */
311 sigsetmask (sigmask (SIGCHLD));
312 if (0 > kill (pid, 0))
314 sigsetmask (SIGEMPTYMASK);
315 kill (getpid (), SIGCHLD);
316 break;
318 if (wait_debugging)
319 sleep (1);
320 else
321 sigpause (SIGEMPTYMASK);
322 #else /* not BSD_SYSTEM, and not HPUX version >= 6 */
323 #ifdef WINDOWSNT
324 wait (0);
325 break;
326 #else /* not WINDOWSNT */
327 sigblock (sigmask (SIGCHLD));
328 errno = 0;
329 if (kill (pid, 0) == -1 && errno == ESRCH)
331 sigunblock (sigmask (SIGCHLD));
332 break;
335 sigsuspend (&empty_mask);
336 #endif /* not WINDOWSNT */
337 #endif /* not BSD_SYSTEM, and not HPUX version >= 6 */
338 if (interruptible)
339 QUIT;
343 /* Wait for subprocess with process id `pid' to terminate and
344 make sure it will get eliminated (not remain forever as a zombie) */
346 void
347 wait_for_termination (int pid)
349 wait_for_termination_1 (pid, 0);
352 /* Like the above, but allow keyboard interruption. */
353 void
354 interruptible_wait_for_termination (int pid)
356 wait_for_termination_1 (pid, 1);
360 * flush any pending output
361 * (may flush input as well; it does not matter the way we use it)
364 void
365 flush_pending_output (int channel)
367 /* FIXME: maybe this function should be removed */
370 /* Set up the terminal at the other end of a pseudo-terminal that
371 we will be controlling an inferior through.
372 It should not echo or do line-editing, since that is done
373 in Emacs. No padding needed for insertion into an Emacs buffer. */
375 void
376 child_setup_tty (int out)
378 #ifndef WINDOWSNT
379 struct emacs_tty s;
381 emacs_get_tty (out, &s);
382 s.main.c_oflag |= OPOST; /* Enable output postprocessing */
383 s.main.c_oflag &= ~ONLCR; /* Disable map of NL to CR-NL on output */
384 #ifdef NLDLY
385 /* http://lists.gnu.org/archive/html/emacs-devel/2008-05/msg00406.html
386 Some versions of GNU Hurd do not have FFDLY? */
387 #ifdef FFDLY
388 s.main.c_oflag &= ~(NLDLY|CRDLY|TABDLY|BSDLY|VTDLY|FFDLY);
389 /* No output delays */
390 #else
391 s.main.c_oflag &= ~(NLDLY|CRDLY|TABDLY|BSDLY|VTDLY);
392 /* No output delays */
393 #endif
394 #endif
395 s.main.c_lflag &= ~ECHO; /* Disable echo */
396 s.main.c_lflag |= ISIG; /* Enable signals */
397 #ifdef IUCLC
398 s.main.c_iflag &= ~IUCLC; /* Disable downcasing on input. */
399 #endif
400 #ifdef ISTRIP
401 s.main.c_iflag &= ~ISTRIP; /* don't strip 8th bit on input */
402 #endif
403 #ifdef OLCUC
404 s.main.c_oflag &= ~OLCUC; /* Disable upcasing on output. */
405 #endif
406 s.main.c_oflag &= ~TAB3; /* Disable tab expansion */
407 s.main.c_cflag = (s.main.c_cflag & ~CSIZE) | CS8; /* Don't strip 8th bit */
408 s.main.c_cc[VERASE] = CDISABLE; /* disable erase processing */
409 s.main.c_cc[VKILL] = CDISABLE; /* disable kill processing */
411 #ifdef HPUX
412 s.main.c_cflag = (s.main.c_cflag & ~CBAUD) | B9600; /* baud rate sanity */
413 #endif /* HPUX */
415 #ifdef SIGNALS_VIA_CHARACTERS
416 /* the QUIT and INTR character are used in process_send_signal
417 so set them here to something useful. */
418 if (s.main.c_cc[VQUIT] == CDISABLE)
419 s.main.c_cc[VQUIT] = '\\'&037; /* Control-\ */
420 if (s.main.c_cc[VINTR] == CDISABLE)
421 s.main.c_cc[VINTR] = 'C'&037; /* Control-C */
422 #endif /* not SIGNALS_VIA_CHARACTERS */
424 #ifdef AIX
425 /* Also, PTY overloads NUL and BREAK.
426 don't ignore break, but don't signal either, so it looks like NUL. */
427 s.main.c_iflag &= ~IGNBRK;
428 s.main.c_iflag &= ~BRKINT;
429 /* rms: Formerly it set s.main.c_cc[VINTR] to 0377 here
430 unconditionally. Then a SIGNALS_VIA_CHARACTERS conditional
431 would force it to 0377. That looks like duplicated code. */
432 s.main.c_cflag = (s.main.c_cflag & ~CBAUD) | B9600; /* baud rate sanity */
433 #endif /* AIX */
435 /* We originally enabled ICANON (and set VEOF to 04), and then had
436 proces.c send additional EOF chars to flush the output when faced
437 with long lines, but this leads to weird effects when the
438 subprocess has disabled ICANON and ends up seeing those spurious
439 extra EOFs. So we don't send EOFs any more in
440 process.c:send_process. First we tried to disable ICANON by
441 default, so if a subsprocess sets up ICANON, it's his problem (or
442 the Elisp package that talks to it) to deal with lines that are
443 too long. But this disables some features, such as the ability
444 to send EOF signals. So we re-enabled ICANON but there is no
445 more "send eof to flush" going on (which is wrong and unportable
446 in itself). The correct way to handle too much output is to
447 buffer what could not be written and then write it again when
448 select returns ok for writing. This has it own set of
449 problems. Write is now asynchronous, is that a problem? How much
450 do we buffer, and what do we do when that limit is reached? */
452 s.main.c_lflag |= ICANON; /* Enable line editing and eof processing */
453 s.main.c_cc[VEOF] = 'D'&037; /* Control-D */
454 #if 0 /* These settings only apply to non-ICANON mode. */
455 s.main.c_cc[VMIN] = 1;
456 s.main.c_cc[VTIME] = 0;
457 #endif
459 emacs_set_tty (out, &s, 0);
460 #endif /* not WINDOWSNT */
462 #endif /* not MSDOS */
465 /* Record a signal code and the handler for it. */
466 struct save_signal
468 int code;
469 void (*handler) (int);
472 static void save_signal_handlers (struct save_signal *);
473 static void restore_signal_handlers (struct save_signal *);
475 /* Suspend the Emacs process; give terminal to its superior. */
477 void
478 sys_suspend (void)
480 #if defined (SIGTSTP) && !defined (MSDOS)
483 int pgrp = EMACS_GETPGRP (0);
484 EMACS_KILLPG (pgrp, SIGTSTP);
487 #else /* No SIGTSTP */
488 /* On a system where suspending is not implemented,
489 instead fork a subshell and let it talk directly to the terminal
490 while we wait. */
491 sys_subshell ();
493 #endif /* no SIGTSTP */
496 /* Fork a subshell. */
498 void
499 sys_subshell (void)
501 #ifdef DOS_NT /* Demacs 1.1.2 91/10/20 Manabu Higashida */
502 int st;
503 char oldwd[MAXPATHLEN+1]; /* Fixed length is safe on MSDOS. */
504 #endif
505 int pid;
506 struct save_signal saved_handlers[5];
507 Lisp_Object dir;
508 unsigned char *volatile str_volatile = 0;
509 unsigned char *str;
510 int len;
512 saved_handlers[0].code = SIGINT;
513 saved_handlers[1].code = SIGQUIT;
514 saved_handlers[2].code = SIGTERM;
515 #ifdef SIGIO
516 saved_handlers[3].code = SIGIO;
517 saved_handlers[4].code = 0;
518 #else
519 saved_handlers[3].code = 0;
520 #endif
522 /* Mentioning current_buffer->buffer would mean including buffer.h,
523 which somehow wedges the hp compiler. So instead... */
525 dir = intern ("default-directory");
526 if (NILP (Fboundp (dir)))
527 goto xyzzy;
528 dir = Fsymbol_value (dir);
529 if (!STRINGP (dir))
530 goto xyzzy;
532 dir = expand_and_dir_to_file (Funhandled_file_name_directory (dir), Qnil);
533 str_volatile = str = (unsigned char *) alloca (SCHARS (dir) + 2);
534 len = SCHARS (dir);
535 memcpy (str, SDATA (dir), len);
536 if (str[len - 1] != '/') str[len++] = '/';
537 str[len] = 0;
538 xyzzy:
540 #ifdef DOS_NT
541 pid = 0;
542 save_signal_handlers (saved_handlers);
543 synch_process_alive = 1;
544 #else
545 pid = vfork ();
546 if (pid == -1)
547 error ("Can't spawn subshell");
548 #endif
550 if (pid == 0)
552 const char *sh = 0;
554 #ifdef DOS_NT /* MW, Aug 1993 */
555 getwd (oldwd);
556 if (sh == 0)
557 sh = (char *) egetenv ("SUSPEND"); /* KFS, 1994-12-14 */
558 #endif
559 if (sh == 0)
560 sh = (char *) egetenv ("SHELL");
561 if (sh == 0)
562 sh = "sh";
564 /* Use our buffer's default directory for the subshell. */
565 str = str_volatile;
566 if (str && chdir ((char *) str) != 0)
568 #ifndef DOS_NT
569 ignore_value (write (1, "Can't chdir\n", 12));
570 _exit (1);
571 #endif
574 close_process_descs (); /* Close Emacs's pipes/ptys */
576 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */
578 char *epwd = getenv ("PWD");
579 char old_pwd[MAXPATHLEN+1+4];
581 /* If PWD is set, pass it with corrected value. */
582 if (epwd)
584 strcpy (old_pwd, epwd);
585 if (str[len - 1] == '/')
586 str[len - 1] = '\0';
587 setenv ("PWD", str, 1);
589 st = system (sh);
590 chdir (oldwd); /* FIXME: Do the right thing on chdir failure. */
591 if (epwd)
592 putenv (old_pwd); /* restore previous value */
594 #else /* not MSDOS */
595 #ifdef WINDOWSNT
596 /* Waits for process completion */
597 pid = _spawnlp (_P_WAIT, sh, sh, NULL);
598 chdir (oldwd); /* FIXME: Do the right thing on chdir failure. */
599 if (pid == -1)
600 write (1, "Can't execute subshell", 22);
601 #else /* not WINDOWSNT */
602 execlp (sh, sh, (char *) 0);
603 ignore_value (write (1, "Can't execute subshell", 22));
604 _exit (1);
605 #endif /* not WINDOWSNT */
606 #endif /* not MSDOS */
609 /* Do this now if we did not do it before. */
610 #ifndef MSDOS
611 save_signal_handlers (saved_handlers);
612 synch_process_alive = 1;
613 #endif
615 #ifndef DOS_NT
616 wait_for_termination (pid);
617 #endif
618 restore_signal_handlers (saved_handlers);
619 synch_process_alive = 0;
622 static void
623 save_signal_handlers (struct save_signal *saved_handlers)
625 while (saved_handlers->code)
627 saved_handlers->handler
628 = (void (*) (int)) signal (saved_handlers->code, SIG_IGN);
629 saved_handlers++;
633 static void
634 restore_signal_handlers (struct save_signal *saved_handlers)
636 while (saved_handlers->code)
638 signal (saved_handlers->code, saved_handlers->handler);
639 saved_handlers++;
643 #ifndef SIGIO
644 /* If SIGIO is broken, don't do anything. */
645 void
646 init_sigio (int fd)
650 static void
651 reset_sigio (int fd)
655 void
656 request_sigio (void)
660 void
661 unrequest_sigio (void)
665 #else
666 #ifdef F_SETFL
668 static int old_fcntl_flags[MAXDESC];
670 void
671 init_sigio (int fd)
673 #ifdef FASYNC
674 old_fcntl_flags[fd] = fcntl (fd, F_GETFL, 0) & ~FASYNC;
675 fcntl (fd, F_SETFL, old_fcntl_flags[fd] | FASYNC);
676 #endif
677 interrupts_deferred = 0;
680 static void
681 reset_sigio (int fd)
683 #ifdef FASYNC
684 fcntl (fd, F_SETFL, old_fcntl_flags[fd]);
685 #endif
688 #ifdef FASYNC /* F_SETFL does not imply existence of FASYNC */
689 /* XXX Uhm, FASYNC is not used anymore here. */
690 /* XXX Yeah, but you need it for SIGIO, don't you? */
692 void
693 request_sigio (void)
695 if (noninteractive)
696 return;
698 #ifdef SIGWINCH
699 sigunblock (sigmask (SIGWINCH));
700 #endif
701 sigunblock (sigmask (SIGIO));
703 interrupts_deferred = 0;
706 void
707 unrequest_sigio (void)
709 if (noninteractive)
710 return;
712 #if 0 /* XXX What's wrong with blocking SIGIO under X? */
713 if (x_display_list)
714 return;
715 #endif
717 #ifdef SIGWINCH
718 sigblock (sigmask (SIGWINCH));
719 #endif
720 sigblock (sigmask (SIGIO));
721 interrupts_deferred = 1;
724 #else /* no FASYNC */
725 #ifndef MSDOS
727 void
728 request_sigio (void)
730 if (noninteractive || read_socket_hook)
731 return;
733 croak ("request_sigio");
736 void
737 unrequest_sigio (void)
739 if (noninteractive || read_socket_hook)
740 return;
742 croak ("unrequest_sigio");
745 #endif /* MSDOS */
746 #endif /* FASYNC */
747 #endif /* F_SETFL */
748 #endif /* SIGIO */
751 /* Getting and setting emacs_tty structures. */
753 /* Set *TC to the parameters associated with the terminal FD.
754 Return zero if all's well, or -1 if we ran into an error we
755 couldn't deal with. */
757 emacs_get_tty (int fd, struct emacs_tty *settings)
759 /* Retrieve the primary parameters - baud rate, character size, etcetera. */
760 #ifndef DOS_NT
761 /* We have those nifty POSIX tcmumbleattr functions. */
762 memset (&settings->main, 0, sizeof (settings->main));
763 if (tcgetattr (fd, &settings->main) < 0)
764 return -1;
765 #endif
767 /* We have survived the tempest. */
768 return 0;
772 /* Set the parameters of the tty on FD according to the contents of
773 *SETTINGS. If FLUSHP is non-zero, we discard input.
774 Return 0 if all went well, and -1 if anything failed. */
777 emacs_set_tty (int fd, struct emacs_tty *settings, int flushp)
779 /* Set the primary parameters - baud rate, character size, etcetera. */
780 #ifndef DOS_NT
781 int i;
782 /* We have those nifty POSIX tcmumbleattr functions.
783 William J. Smith <wjs@wiis.wang.com> writes:
784 "POSIX 1003.1 defines tcsetattr to return success if it was
785 able to perform any of the requested actions, even if some
786 of the requested actions could not be performed.
787 We must read settings back to ensure tty setup properly.
788 AIX requires this to keep tty from hanging occasionally." */
789 /* This make sure that we don't loop indefinitely in here. */
790 for (i = 0 ; i < 10 ; i++)
791 if (tcsetattr (fd, flushp ? TCSAFLUSH : TCSADRAIN, &settings->main) < 0)
793 if (errno == EINTR)
794 continue;
795 else
796 return -1;
798 else
800 struct termios new;
802 memset (&new, 0, sizeof (new));
803 /* Get the current settings, and see if they're what we asked for. */
804 tcgetattr (fd, &new);
805 /* We cannot use memcmp on the whole structure here because under
806 * aix386 the termios structure has some reserved field that may
807 * not be filled in.
809 if ( new.c_iflag == settings->main.c_iflag
810 && new.c_oflag == settings->main.c_oflag
811 && new.c_cflag == settings->main.c_cflag
812 && new.c_lflag == settings->main.c_lflag
813 && memcmp (new.c_cc, settings->main.c_cc, NCCS) == 0)
814 break;
815 else
816 continue;
818 #endif
820 /* We have survived the tempest. */
821 return 0;
826 #ifdef F_SETOWN
827 static int old_fcntl_owner[MAXDESC];
828 #endif /* F_SETOWN */
830 /* This may also be defined in stdio,
831 but if so, this does no harm,
832 and using the same name avoids wasting the other one's space. */
834 #if defined (USG)
835 unsigned char _sobuf[BUFSIZ+8];
836 #else
837 char _sobuf[BUFSIZ];
838 #endif
840 /* Initialize the terminal mode on all tty devices that are currently
841 open. */
843 void
844 init_all_sys_modes (void)
846 struct tty_display_info *tty;
847 for (tty = tty_list; tty; tty = tty->next)
848 init_sys_modes (tty);
851 /* Initialize the terminal mode on the given tty device. */
853 void
854 init_sys_modes (struct tty_display_info *tty_out)
856 struct emacs_tty tty;
857 Lisp_Object terminal;
859 Vtty_erase_char = Qnil;
861 if (noninteractive)
862 return;
864 if (!tty_out->output)
865 return; /* The tty is suspended. */
867 if (! tty_out->old_tty)
868 tty_out->old_tty = (struct emacs_tty *) xmalloc (sizeof (struct emacs_tty));
870 emacs_get_tty (fileno (tty_out->input), tty_out->old_tty);
872 tty = *tty_out->old_tty;
874 #if !defined (DOS_NT)
875 XSETINT (Vtty_erase_char, tty.main.c_cc[VERASE]);
877 tty.main.c_iflag |= (IGNBRK); /* Ignore break condition */
878 tty.main.c_iflag &= ~ICRNL; /* Disable map of CR to NL on input */
879 #ifdef INLCR /* I'm just being cautious,
880 since I can't check how widespread INLCR is--rms. */
881 tty.main.c_iflag &= ~INLCR; /* Disable map of NL to CR on input */
882 #endif
883 #ifdef ISTRIP
884 tty.main.c_iflag &= ~ISTRIP; /* don't strip 8th bit on input */
885 #endif
886 tty.main.c_lflag &= ~ECHO; /* Disable echo */
887 tty.main.c_lflag &= ~ICANON; /* Disable erase/kill processing */
888 #ifdef IEXTEN
889 tty.main.c_lflag &= ~IEXTEN; /* Disable other editing characters. */
890 #endif
891 tty.main.c_lflag |= ISIG; /* Enable signals */
892 if (tty_out->flow_control)
894 tty.main.c_iflag |= IXON; /* Enable start/stop output control */
895 #ifdef IXANY
896 tty.main.c_iflag &= ~IXANY;
897 #endif /* IXANY */
899 else
900 tty.main.c_iflag &= ~IXON; /* Disable start/stop output control */
901 tty.main.c_oflag &= ~ONLCR; /* Disable map of NL to CR-NL
902 on output */
903 tty.main.c_oflag &= ~TAB3; /* Disable tab expansion */
904 #ifdef CS8
905 if (tty_out->meta_key)
907 tty.main.c_cflag |= CS8; /* allow 8th bit on input */
908 tty.main.c_cflag &= ~PARENB;/* Don't check parity */
910 #endif
912 XSETTERMINAL(terminal, tty_out->terminal);
913 if (!NILP (Fcontrolling_tty_p (terminal)))
915 tty.main.c_cc[VINTR] = quit_char; /* C-g (usually) gives SIGINT */
916 /* Set up C-g for both SIGQUIT and SIGINT.
917 We don't know which we will get, but we handle both alike
918 so which one it really gives us does not matter. */
919 tty.main.c_cc[VQUIT] = quit_char;
921 else
923 /* We normally don't get interrupt or quit signals from tty
924 devices other than our controlling terminal; therefore,
925 we must handle C-g as normal input. Unfortunately, this
926 means that the interrupt and quit feature must be
927 disabled on secondary ttys, or we would not even see the
928 keypress.
930 Note that even though emacsclient could have special code
931 to pass SIGINT to Emacs, we should _not_ enable
932 interrupt/quit keys for emacsclient frames. This means
933 that we can't break out of loops in C code from a
934 secondary tty frame, but we can always decide what
935 display the C-g came from, which is more important from a
936 usability point of view. (Consider the case when two
937 people work together using the same Emacs instance.) */
938 tty.main.c_cc[VINTR] = CDISABLE;
939 tty.main.c_cc[VQUIT] = CDISABLE;
941 tty.main.c_cc[VMIN] = 1; /* Input should wait for at least 1 char */
942 tty.main.c_cc[VTIME] = 0; /* no matter how long that takes. */
943 #ifdef VSWTCH
944 tty.main.c_cc[VSWTCH] = CDISABLE; /* Turn off shell layering use
945 of C-z */
946 #endif /* VSWTCH */
948 #ifdef VSUSP
949 tty.main.c_cc[VSUSP] = CDISABLE; /* Turn off handling of C-z. */
950 #endif /* VSUSP */
951 #ifdef V_DSUSP
952 tty.main.c_cc[V_DSUSP] = CDISABLE; /* Turn off handling of C-y. */
953 #endif /* V_DSUSP */
954 #ifdef VDSUSP /* Some systems have VDSUSP, some have V_DSUSP. */
955 tty.main.c_cc[VDSUSP] = CDISABLE;
956 #endif /* VDSUSP */
957 #ifdef VLNEXT
958 tty.main.c_cc[VLNEXT] = CDISABLE;
959 #endif /* VLNEXT */
960 #ifdef VREPRINT
961 tty.main.c_cc[VREPRINT] = CDISABLE;
962 #endif /* VREPRINT */
963 #ifdef VWERASE
964 tty.main.c_cc[VWERASE] = CDISABLE;
965 #endif /* VWERASE */
966 #ifdef VDISCARD
967 tty.main.c_cc[VDISCARD] = CDISABLE;
968 #endif /* VDISCARD */
970 if (tty_out->flow_control)
972 #ifdef VSTART
973 tty.main.c_cc[VSTART] = '\021';
974 #endif /* VSTART */
975 #ifdef VSTOP
976 tty.main.c_cc[VSTOP] = '\023';
977 #endif /* VSTOP */
979 else
981 #ifdef VSTART
982 tty.main.c_cc[VSTART] = CDISABLE;
983 #endif /* VSTART */
984 #ifdef VSTOP
985 tty.main.c_cc[VSTOP] = CDISABLE;
986 #endif /* VSTOP */
989 #ifdef AIX
990 tty.main.c_cc[VSTRT] = CDISABLE;
991 tty.main.c_cc[VSTOP] = CDISABLE;
992 tty.main.c_cc[VSUSP] = CDISABLE;
993 tty.main.c_cc[VDSUSP] = CDISABLE;
994 if (tty_out->flow_control)
996 #ifdef VSTART
997 tty.main.c_cc[VSTART] = '\021';
998 #endif /* VSTART */
999 #ifdef VSTOP
1000 tty.main.c_cc[VSTOP] = '\023';
1001 #endif /* VSTOP */
1003 /* Also, PTY overloads NUL and BREAK.
1004 don't ignore break, but don't signal either, so it looks like NUL.
1005 This really serves a purpose only if running in an XTERM window
1006 or via TELNET or the like, but does no harm elsewhere. */
1007 tty.main.c_iflag &= ~IGNBRK;
1008 tty.main.c_iflag &= ~BRKINT;
1009 #endif
1010 #endif /* not DOS_NT */
1012 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida, MW Aug 1993 */
1013 if (!tty_out->term_initted)
1014 internal_terminal_init ();
1015 dos_ttraw (tty_out);
1016 #endif
1018 emacs_set_tty (fileno (tty_out->input), &tty, 0);
1020 /* This code added to insure that, if flow-control is not to be used,
1021 we have an unlocked terminal at the start. */
1023 #ifdef TCXONC
1024 if (!tty_out->flow_control) ioctl (fileno (tty_out->input), TCXONC, 1);
1025 #endif
1026 #ifdef TIOCSTART
1027 if (!tty_out->flow_control) ioctl (fileno (tty_out->input), TIOCSTART, 0);
1028 #endif
1030 #if !defined (DOS_NT)
1031 #ifdef TCOON
1032 if (!tty_out->flow_control) tcflow (fileno (tty_out->input), TCOON);
1033 #endif
1034 #endif
1036 #ifdef F_SETFL
1037 #ifdef F_GETOWN /* F_SETFL does not imply existence of F_GETOWN */
1038 if (interrupt_input)
1040 old_fcntl_owner[fileno (tty_out->input)] =
1041 fcntl (fileno (tty_out->input), F_GETOWN, 0);
1042 fcntl (fileno (tty_out->input), F_SETOWN, getpid ());
1043 init_sigio (fileno (tty_out->input));
1044 #ifdef HAVE_GPM
1045 if (gpm_tty == tty_out)
1047 /* Arrange for mouse events to give us SIGIO signals. */
1048 fcntl (gpm_fd, F_SETOWN, getpid ());
1049 fcntl (gpm_fd, F_SETFL, fcntl (gpm_fd, F_GETFL, 0) | O_NONBLOCK);
1050 init_sigio (gpm_fd);
1052 #endif /* HAVE_GPM */
1054 #endif /* F_GETOWN */
1055 #endif /* F_SETFL */
1057 #ifdef _IOFBF
1058 /* This symbol is defined on recent USG systems.
1059 Someone says without this call USG won't really buffer the file
1060 even with a call to setbuf. */
1061 setvbuf (tty_out->output, (char *) _sobuf, _IOFBF, sizeof _sobuf);
1062 #else
1063 setbuf (tty_out->output, (char *) _sobuf);
1064 #endif
1066 if (tty_out->terminal->set_terminal_modes_hook)
1067 tty_out->terminal->set_terminal_modes_hook (tty_out->terminal);
1069 if (!tty_out->term_initted)
1071 Lisp_Object tail, frame;
1072 FOR_EACH_FRAME (tail, frame)
1074 /* XXX This needs to be revised. */
1075 if (FRAME_TERMCAP_P (XFRAME (frame))
1076 && FRAME_TTY (XFRAME (frame)) == tty_out)
1077 init_frame_faces (XFRAME (frame));
1081 if (tty_out->term_initted && no_redraw_on_reenter)
1083 /* We used to call "direct_output_forward_char(0)" here,
1084 but it's not clear why, since it may not do anything anyway. */
1086 else
1088 Lisp_Object tail, frame;
1089 frame_garbaged = 1;
1090 FOR_EACH_FRAME (tail, frame)
1092 if ((FRAME_TERMCAP_P (XFRAME (frame))
1093 || FRAME_MSDOS_P (XFRAME (frame)))
1094 && FRAME_TTY (XFRAME (frame)) == tty_out)
1095 FRAME_GARBAGED_P (XFRAME (frame)) = 1;
1099 tty_out->term_initted = 1;
1102 /* Return nonzero if safe to use tabs in output.
1103 At the time this is called, init_sys_modes has not been done yet. */
1106 tabs_safe_p (int fd)
1108 struct emacs_tty etty;
1110 emacs_get_tty (fd, &etty);
1111 #ifndef DOS_NT
1112 #ifdef TABDLY
1113 return ((etty.main.c_oflag & TABDLY) != TAB3);
1114 #else /* not TABDLY */
1115 return 1;
1116 #endif /* not TABDLY */
1117 #else /* DOS_NT */
1118 return 0;
1119 #endif /* DOS_NT */
1122 /* Get terminal size from system.
1123 Store number of lines into *HEIGHTP and width into *WIDTHP.
1124 We store 0 if there's no valid information. */
1126 void
1127 get_tty_size (int fd, int *widthp, int *heightp)
1129 #if defined TIOCGWINSZ
1131 /* BSD-style. */
1132 struct winsize size;
1134 if (ioctl (fd, TIOCGWINSZ, &size) == -1)
1135 *widthp = *heightp = 0;
1136 else
1138 *widthp = size.ws_col;
1139 *heightp = size.ws_row;
1142 #elif defined TIOCGSIZE
1144 /* SunOS - style. */
1145 struct ttysize size;
1147 if (ioctl (fd, TIOCGSIZE, &size) == -1)
1148 *widthp = *heightp = 0;
1149 else
1151 *widthp = size.ts_cols;
1152 *heightp = size.ts_lines;
1155 #elif defined WINDOWSNT
1157 CONSOLE_SCREEN_BUFFER_INFO info;
1158 if (GetConsoleScreenBufferInfo (GetStdHandle (STD_OUTPUT_HANDLE), &info))
1160 *widthp = info.srWindow.Right - info.srWindow.Left + 1;
1161 *heightp = info.srWindow.Bottom - info.srWindow.Top + 1;
1163 else
1164 *widthp = *heightp = 0;
1166 #elif defined MSDOS
1168 *widthp = ScreenCols ();
1169 *heightp = ScreenRows ();
1171 #else /* system doesn't know size */
1173 *widthp = 0;
1174 *heightp = 0;
1176 #endif
1179 /* Set the logical window size associated with descriptor FD
1180 to HEIGHT and WIDTH. This is used mainly with ptys. */
1183 set_window_size (int fd, int height, int width)
1185 #ifdef TIOCSWINSZ
1187 /* BSD-style. */
1188 struct winsize size;
1189 size.ws_row = height;
1190 size.ws_col = width;
1192 if (ioctl (fd, TIOCSWINSZ, &size) == -1)
1193 return 0; /* error */
1194 else
1195 return 1;
1197 #else
1198 #ifdef TIOCSSIZE
1200 /* SunOS - style. */
1201 struct ttysize size;
1202 size.ts_lines = height;
1203 size.ts_cols = width;
1205 if (ioctl (fd, TIOCGSIZE, &size) == -1)
1206 return 0;
1207 else
1208 return 1;
1209 #else
1210 return -1;
1211 #endif /* not SunOS-style */
1212 #endif /* not BSD-style */
1217 /* Prepare all terminal devices for exiting Emacs. */
1219 void
1220 reset_all_sys_modes (void)
1222 struct tty_display_info *tty;
1223 for (tty = tty_list; tty; tty = tty->next)
1224 reset_sys_modes (tty);
1227 /* Prepare the terminal for closing it; move the cursor to the
1228 bottom of the frame, turn off interrupt-driven I/O, etc. */
1230 void
1231 reset_sys_modes (struct tty_display_info *tty_out)
1233 if (noninteractive)
1235 fflush (stdout);
1236 return;
1238 if (!tty_out->term_initted)
1239 return;
1241 if (!tty_out->output)
1242 return; /* The tty is suspended. */
1244 /* Go to and clear the last line of the terminal. */
1246 cmgoto (tty_out, FrameRows (tty_out) - 1, 0);
1248 /* Code adapted from tty_clear_end_of_line. */
1249 if (tty_out->TS_clr_line)
1251 emacs_tputs (tty_out, tty_out->TS_clr_line, 1, cmputc);
1253 else
1254 { /* have to do it the hard way */
1255 int i;
1256 tty_turn_off_insert (tty_out);
1258 for (i = curX (tty_out); i < FrameCols (tty_out) - 1; i++)
1260 fputc (' ', tty_out->output);
1264 cmgoto (tty_out, FrameRows (tty_out) - 1, 0);
1265 fflush (tty_out->output);
1267 if (tty_out->terminal->reset_terminal_modes_hook)
1268 tty_out->terminal->reset_terminal_modes_hook (tty_out->terminal);
1270 #ifdef BSD_SYSTEM
1271 /* Avoid possible loss of output when changing terminal modes. */
1272 fsync (fileno (tty_out->output));
1273 #endif
1275 #ifdef F_SETFL
1276 #ifdef F_SETOWN /* F_SETFL does not imply existence of F_SETOWN */
1277 if (interrupt_input)
1279 reset_sigio (fileno (tty_out->input));
1280 fcntl (fileno (tty_out->input), F_SETOWN,
1281 old_fcntl_owner[fileno (tty_out->input)]);
1283 #endif /* F_SETOWN */
1284 #ifdef O_NDELAY
1285 fcntl (fileno (tty_out->input), F_SETFL,
1286 fcntl (fileno (tty_out->input), F_GETFL, 0) & ~O_NDELAY);
1287 #endif
1288 #endif /* F_SETFL */
1290 if (tty_out->old_tty)
1291 while (emacs_set_tty (fileno (tty_out->input),
1292 tty_out->old_tty, 0) < 0 && errno == EINTR)
1295 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */
1296 dos_ttcooked ();
1297 #endif
1301 #ifdef HAVE_PTYS
1303 /* Set up the proper status flags for use of a pty. */
1305 void
1306 setup_pty (int fd)
1308 /* I'm told that TOICREMOTE does not mean control chars
1309 "can't be sent" but rather that they don't have
1310 input-editing or signaling effects.
1311 That should be good, because we have other ways
1312 to do those things in Emacs.
1313 However, telnet mode seems not to work on 4.2.
1314 So TIOCREMOTE is turned off now. */
1316 /* Under hp-ux, if TIOCREMOTE is turned on, some calls
1317 will hang. In particular, the "timeout" feature (which
1318 causes a read to return if there is no data available)
1319 does this. Also it is known that telnet mode will hang
1320 in such a way that Emacs must be stopped (perhaps this
1321 is the same problem).
1323 If TIOCREMOTE is turned off, then there is a bug in
1324 hp-ux which sometimes loses data. Apparently the
1325 code which blocks the master process when the internal
1326 buffer fills up does not work. Other than this,
1327 though, everything else seems to work fine.
1329 Since the latter lossage is more benign, we may as well
1330 lose that way. -- cph */
1331 #ifdef FIONBIO
1332 #if defined (UNIX98_PTYS)
1334 int on = 1;
1335 ioctl (fd, FIONBIO, &on);
1337 #endif
1338 #endif
1340 #endif /* HAVE_PTYS */
1342 #ifdef HAVE_SOCKETS
1343 #include <sys/socket.h>
1344 #include <netdb.h>
1345 #endif /* HAVE_SOCKETS */
1347 #ifdef TRY_AGAIN
1348 #ifndef HAVE_H_ERRNO
1349 extern int h_errno;
1350 #endif
1351 #endif /* TRY_AGAIN */
1353 void
1354 init_system_name (void)
1356 #ifndef HAVE_GETHOSTNAME
1357 struct utsname uts;
1358 uname (&uts);
1359 Vsystem_name = build_string (uts.nodename);
1360 #else /* HAVE_GETHOSTNAME */
1361 unsigned int hostname_size = 256;
1362 char *hostname = (char *) alloca (hostname_size);
1364 /* Try to get the host name; if the buffer is too short, try
1365 again. Apparently, the only indication gethostname gives of
1366 whether the buffer was large enough is the presence or absence
1367 of a '\0' in the string. Eech. */
1368 for (;;)
1370 gethostname (hostname, hostname_size - 1);
1371 hostname[hostname_size - 1] = '\0';
1373 /* Was the buffer large enough for the '\0'? */
1374 if (strlen (hostname) < hostname_size - 1)
1375 break;
1377 hostname_size <<= 1;
1378 hostname = (char *) alloca (hostname_size);
1380 #ifdef HAVE_SOCKETS
1381 /* Turn the hostname into the official, fully-qualified hostname.
1382 Don't do this if we're going to dump; this can confuse system
1383 libraries on some machines and make the dumped emacs core dump. */
1384 #ifndef CANNOT_DUMP
1385 if (initialized)
1386 #endif /* not CANNOT_DUMP */
1387 if (! strchr (hostname, '.'))
1389 int count;
1390 #ifdef HAVE_GETADDRINFO
1391 struct addrinfo *res;
1392 struct addrinfo hints;
1393 int ret;
1395 memset (&hints, 0, sizeof (hints));
1396 hints.ai_socktype = SOCK_STREAM;
1397 hints.ai_flags = AI_CANONNAME;
1399 for (count = 0;; count++)
1401 if ((ret = getaddrinfo (hostname, NULL, &hints, &res)) == 0
1402 || ret != EAI_AGAIN)
1403 break;
1405 if (count >= 5)
1406 break;
1407 Fsleep_for (make_number (1), Qnil);
1410 if (ret == 0)
1412 struct addrinfo *it = res;
1413 while (it)
1415 char *fqdn = it->ai_canonname;
1416 if (fqdn && strchr (fqdn, '.')
1417 && strcmp (fqdn, "localhost.localdomain") != 0)
1418 break;
1419 it = it->ai_next;
1421 if (it)
1423 hostname = alloca (strlen (it->ai_canonname) + 1);
1424 strcpy (hostname, it->ai_canonname);
1426 freeaddrinfo (res);
1428 #else /* !HAVE_GETADDRINFO */
1429 struct hostent *hp;
1430 for (count = 0;; count++)
1433 #ifdef TRY_AGAIN
1434 h_errno = 0;
1435 #endif
1436 hp = gethostbyname (hostname);
1437 #ifdef TRY_AGAIN
1438 if (! (hp == 0 && h_errno == TRY_AGAIN))
1439 #endif
1441 break;
1443 if (count >= 5)
1444 break;
1445 Fsleep_for (make_number (1), Qnil);
1448 if (hp)
1450 char *fqdn = (char *) hp->h_name;
1452 if (!strchr (fqdn, '.'))
1454 /* We still don't have a fully qualified domain name.
1455 Try to find one in the list of alternate names */
1456 char **alias = hp->h_aliases;
1457 while (*alias
1458 && (!strchr (*alias, '.')
1459 || !strcmp (*alias, "localhost.localdomain")))
1460 alias++;
1461 if (*alias)
1462 fqdn = *alias;
1464 hostname = fqdn;
1466 #endif /* !HAVE_GETADDRINFO */
1468 #endif /* HAVE_SOCKETS */
1469 Vsystem_name = build_string (hostname);
1470 #endif /* HAVE_GETHOSTNAME */
1472 unsigned char *p;
1473 for (p = SDATA (Vsystem_name); *p; p++)
1474 if (*p == ' ' || *p == '\t')
1475 *p = '-';
1479 /* POSIX signals support - DJB */
1480 /* Anyone with POSIX signals should have ANSI C declarations */
1482 sigset_t empty_mask;
1484 #ifndef WINDOWSNT
1486 signal_handler_t
1487 sys_signal (int signal_number, signal_handler_t action)
1489 struct sigaction new_action, old_action;
1490 sigemptyset (&new_action.sa_mask);
1491 new_action.sa_handler = action;
1492 new_action.sa_flags = 0;
1493 #if defined (SA_RESTART)
1494 /* Emacs mostly works better with restartable system services. If this
1495 flag exists, we probably want to turn it on here.
1496 However, on some systems this resets the timeout of `select'
1497 which means that `select' never finishes if it keeps getting signals.
1498 BROKEN_SA_RESTART is defined on those systems. */
1499 /* It's not clear why the comment above says "mostly works better". --Stef
1500 When SYNC_INPUT is set, we don't want SA_RESTART because we need to poll
1501 for pending input so we need long-running syscalls to be interrupted
1502 after a signal that sets the interrupt_input_pending flag. */
1503 /* Non-interactive keyboard input goes through stdio, where we always
1504 want restartable system calls. */
1505 # if defined (BROKEN_SA_RESTART) || defined (SYNC_INPUT)
1506 if (noninteractive)
1507 # endif
1508 new_action.sa_flags = SA_RESTART;
1509 #endif
1510 sigaction (signal_number, &new_action, &old_action);
1511 return (old_action.sa_handler);
1514 #endif /* WINDOWSNT */
1516 #ifndef __GNUC__
1517 /* If we're compiling with GCC, we don't need this function, since it
1518 can be written as a macro. */
1519 sigset_t
1520 sys_sigmask (int sig)
1522 sigset_t mask;
1523 sigemptyset (&mask);
1524 sigaddset (&mask, sig);
1525 return mask;
1527 #endif
1529 /* I'd like to have these guys return pointers to the mask storage in here,
1530 but there'd be trouble if the code was saving multiple masks. I'll be
1531 safe and pass the structure. It normally won't be more than 2 bytes
1532 anyhow. - DJB */
1534 sigset_t
1535 sys_sigblock (sigset_t new_mask)
1537 sigset_t old_mask;
1538 pthread_sigmask (SIG_BLOCK, &new_mask, &old_mask);
1539 return (old_mask);
1542 sigset_t
1543 sys_sigunblock (sigset_t new_mask)
1545 sigset_t old_mask;
1546 pthread_sigmask (SIG_UNBLOCK, &new_mask, &old_mask);
1547 return (old_mask);
1550 sigset_t
1551 sys_sigsetmask (sigset_t new_mask)
1553 sigset_t old_mask;
1554 pthread_sigmask (SIG_SETMASK, &new_mask, &old_mask);
1555 return (old_mask);
1559 #if !defined HAVE_STRSIGNAL && !HAVE_DECL_SYS_SIGLIST
1560 static char *my_sys_siglist[NSIG];
1561 # ifdef sys_siglist
1562 # undef sys_siglist
1563 # endif
1564 # define sys_siglist my_sys_siglist
1565 #endif
1567 void
1568 init_signals (void)
1570 sigemptyset (&empty_mask);
1572 #if !defined HAVE_STRSIGNAL && !HAVE_DECL_SYS_SIGLIST
1573 if (! initialized)
1575 # ifdef SIGABRT
1576 sys_siglist[SIGABRT] = "Aborted";
1577 # endif
1578 # ifdef SIGAIO
1579 sys_siglist[SIGAIO] = "LAN I/O interrupt";
1580 # endif
1581 # ifdef SIGALRM
1582 sys_siglist[SIGALRM] = "Alarm clock";
1583 # endif
1584 # ifdef SIGBUS
1585 sys_siglist[SIGBUS] = "Bus error";
1586 # endif
1587 # ifdef SIGCLD
1588 sys_siglist[SIGCLD] = "Child status changed";
1589 # endif
1590 # ifdef SIGCHLD
1591 sys_siglist[SIGCHLD] = "Child status changed";
1592 # endif
1593 # ifdef SIGCONT
1594 sys_siglist[SIGCONT] = "Continued";
1595 # endif
1596 # ifdef SIGDANGER
1597 sys_siglist[SIGDANGER] = "Swap space dangerously low";
1598 # endif
1599 # ifdef SIGDGNOTIFY
1600 sys_siglist[SIGDGNOTIFY] = "Notification message in queue";
1601 # endif
1602 # ifdef SIGEMT
1603 sys_siglist[SIGEMT] = "Emulation trap";
1604 # endif
1605 # ifdef SIGFPE
1606 sys_siglist[SIGFPE] = "Arithmetic exception";
1607 # endif
1608 # ifdef SIGFREEZE
1609 sys_siglist[SIGFREEZE] = "SIGFREEZE";
1610 # endif
1611 # ifdef SIGGRANT
1612 sys_siglist[SIGGRANT] = "Monitor mode granted";
1613 # endif
1614 # ifdef SIGHUP
1615 sys_siglist[SIGHUP] = "Hangup";
1616 # endif
1617 # ifdef SIGILL
1618 sys_siglist[SIGILL] = "Illegal instruction";
1619 # endif
1620 # ifdef SIGINT
1621 sys_siglist[SIGINT] = "Interrupt";
1622 # endif
1623 # ifdef SIGIO
1624 sys_siglist[SIGIO] = "I/O possible";
1625 # endif
1626 # ifdef SIGIOINT
1627 sys_siglist[SIGIOINT] = "I/O intervention required";
1628 # endif
1629 # ifdef SIGIOT
1630 sys_siglist[SIGIOT] = "IOT trap";
1631 # endif
1632 # ifdef SIGKILL
1633 sys_siglist[SIGKILL] = "Killed";
1634 # endif
1635 # ifdef SIGLOST
1636 sys_siglist[SIGLOST] = "Resource lost";
1637 # endif
1638 # ifdef SIGLWP
1639 sys_siglist[SIGLWP] = "SIGLWP";
1640 # endif
1641 # ifdef SIGMSG
1642 sys_siglist[SIGMSG] = "Monitor mode data available";
1643 # endif
1644 # ifdef SIGPHONE
1645 sys_siglist[SIGWIND] = "SIGPHONE";
1646 # endif
1647 # ifdef SIGPIPE
1648 sys_siglist[SIGPIPE] = "Broken pipe";
1649 # endif
1650 # ifdef SIGPOLL
1651 sys_siglist[SIGPOLL] = "Pollable event occurred";
1652 # endif
1653 # ifdef SIGPROF
1654 sys_siglist[SIGPROF] = "Profiling timer expired";
1655 # endif
1656 # ifdef SIGPTY
1657 sys_siglist[SIGPTY] = "PTY I/O interrupt";
1658 # endif
1659 # ifdef SIGPWR
1660 sys_siglist[SIGPWR] = "Power-fail restart";
1661 # endif
1662 # ifdef SIGQUIT
1663 sys_siglist[SIGQUIT] = "Quit";
1664 # endif
1665 # ifdef SIGRETRACT
1666 sys_siglist[SIGRETRACT] = "Need to relinguish monitor mode";
1667 # endif
1668 # ifdef SIGSAK
1669 sys_siglist[SIGSAK] = "Secure attention";
1670 # endif
1671 # ifdef SIGSEGV
1672 sys_siglist[SIGSEGV] = "Segmentation violation";
1673 # endif
1674 # ifdef SIGSOUND
1675 sys_siglist[SIGSOUND] = "Sound completed";
1676 # endif
1677 # ifdef SIGSTOP
1678 sys_siglist[SIGSTOP] = "Stopped (signal)";
1679 # endif
1680 # ifdef SIGSTP
1681 sys_siglist[SIGSTP] = "Stopped (user)";
1682 # endif
1683 # ifdef SIGSYS
1684 sys_siglist[SIGSYS] = "Bad argument to system call";
1685 # endif
1686 # ifdef SIGTERM
1687 sys_siglist[SIGTERM] = "Terminated";
1688 # endif
1689 # ifdef SIGTHAW
1690 sys_siglist[SIGTHAW] = "SIGTHAW";
1691 # endif
1692 # ifdef SIGTRAP
1693 sys_siglist[SIGTRAP] = "Trace/breakpoint trap";
1694 # endif
1695 # ifdef SIGTSTP
1696 sys_siglist[SIGTSTP] = "Stopped (user)";
1697 # endif
1698 # ifdef SIGTTIN
1699 sys_siglist[SIGTTIN] = "Stopped (tty input)";
1700 # endif
1701 # ifdef SIGTTOU
1702 sys_siglist[SIGTTOU] = "Stopped (tty output)";
1703 # endif
1704 # ifdef SIGURG
1705 sys_siglist[SIGURG] = "Urgent I/O condition";
1706 # endif
1707 # ifdef SIGUSR1
1708 sys_siglist[SIGUSR1] = "User defined signal 1";
1709 # endif
1710 # ifdef SIGUSR2
1711 sys_siglist[SIGUSR2] = "User defined signal 2";
1712 # endif
1713 # ifdef SIGVTALRM
1714 sys_siglist[SIGVTALRM] = "Virtual timer expired";
1715 # endif
1716 # ifdef SIGWAITING
1717 sys_siglist[SIGWAITING] = "Process's LWPs are blocked";
1718 # endif
1719 # ifdef SIGWINCH
1720 sys_siglist[SIGWINCH] = "Window size changed";
1721 # endif
1722 # ifdef SIGWIND
1723 sys_siglist[SIGWIND] = "SIGWIND";
1724 # endif
1725 # ifdef SIGXCPU
1726 sys_siglist[SIGXCPU] = "CPU time limit exceeded";
1727 # endif
1728 # ifdef SIGXFSZ
1729 sys_siglist[SIGXFSZ] = "File size limit exceeded";
1730 # endif
1732 #endif /* !defined HAVE_STRSIGNAL && !defined HAVE_DECL_SYS_SIGLIST */
1735 #ifndef HAVE_RANDOM
1736 #ifdef random
1737 #define HAVE_RANDOM
1738 #endif
1739 #endif
1741 /* Figure out how many bits the system's random number generator uses.
1742 `random' and `lrand48' are assumed to return 31 usable bits.
1743 BSD `rand' returns a 31 bit value but the low order bits are unusable;
1744 so we'll shift it and treat it like the 15-bit USG `rand'. */
1746 #ifndef RAND_BITS
1747 # ifdef HAVE_RANDOM
1748 # define RAND_BITS 31
1749 # else /* !HAVE_RANDOM */
1750 # ifdef HAVE_LRAND48
1751 # define RAND_BITS 31
1752 # define random lrand48
1753 # else /* !HAVE_LRAND48 */
1754 # define RAND_BITS 15
1755 # if RAND_MAX == 32767
1756 # define random rand
1757 # else /* RAND_MAX != 32767 */
1758 # if RAND_MAX == 2147483647
1759 # define random() (rand () >> 16)
1760 # else /* RAND_MAX != 2147483647 */
1761 # ifdef USG
1762 # define random rand
1763 # else
1764 # define random() (rand () >> 16)
1765 # endif /* !USG */
1766 # endif /* RAND_MAX != 2147483647 */
1767 # endif /* RAND_MAX != 32767 */
1768 # endif /* !HAVE_LRAND48 */
1769 # endif /* !HAVE_RANDOM */
1770 #endif /* !RAND_BITS */
1772 void
1773 seed_random (long int arg)
1775 #ifdef HAVE_RANDOM
1776 srandom ((unsigned int)arg);
1777 #else
1778 # ifdef HAVE_LRAND48
1779 srand48 (arg);
1780 # else
1781 srand ((unsigned int)arg);
1782 # endif
1783 #endif
1787 * Return a nonnegative random integer out of whatever we've got.
1788 * It contains enough bits to make a random (signed) Emacs fixnum.
1789 * This suffices even for a 64-bit architecture with a 15-bit rand.
1791 EMACS_INT
1792 get_random (void)
1794 EMACS_UINT val = 0;
1795 int i;
1796 for (i = 0; i < (FIXNUM_BITS + RAND_BITS - 1) / RAND_BITS; i++)
1797 val = (random () ^ (val << RAND_BITS)
1798 ^ (val >> (BITS_PER_EMACS_INT - RAND_BITS)));
1799 val ^= val >> (BITS_PER_EMACS_INT - FIXNUM_BITS);
1800 return val & INTMASK;
1803 #ifndef HAVE_STRERROR
1804 #ifndef WINDOWSNT
1805 char *
1806 strerror (int errnum)
1808 extern char *sys_errlist[];
1809 extern int sys_nerr;
1811 if (errnum >= 0 && errnum < sys_nerr)
1812 return sys_errlist[errnum];
1813 return (char *) "Unknown error";
1815 #endif /* not WINDOWSNT */
1816 #endif /* ! HAVE_STRERROR */
1818 #ifndef HAVE_SNPRINTF
1819 /* Approximate snprintf as best we can on ancient hosts that lack it. */
1821 snprintf (char *buf, size_t bufsize, char const *format, ...)
1823 ptrdiff_t size = min (bufsize, PTRDIFF_MAX);
1824 ptrdiff_t nbytes = size - 1;
1825 va_list ap;
1827 if (size)
1829 va_start (ap, format);
1830 nbytes = doprnt (buf, size, format, 0, ap);
1831 va_end (ap);
1834 if (nbytes == size - 1)
1836 /* Calculate the length of the string that would have been created
1837 had the buffer been large enough. */
1838 char stackbuf[4000];
1839 char *b = stackbuf;
1840 ptrdiff_t bsize = sizeof stackbuf;
1841 va_start (ap, format);
1842 nbytes = evxprintf (&b, &bsize, stackbuf, -1, format, ap);
1843 va_end (ap);
1844 if (b != stackbuf)
1845 xfree (b);
1848 if (INT_MAX < nbytes)
1850 #ifdef EOVERFLOW
1851 errno = EOVERFLOW;
1852 #else
1853 errno = EDOM;
1854 #endif
1855 return -1;
1857 return nbytes;
1859 #endif
1862 emacs_open (const char *path, int oflag, int mode)
1864 register int rtnval;
1866 while ((rtnval = open (path, oflag, mode)) == -1
1867 && (errno == EINTR))
1868 QUIT;
1869 return (rtnval);
1873 emacs_close (int fd)
1875 int did_retry = 0;
1876 register int rtnval;
1878 while ((rtnval = close (fd)) == -1
1879 && (errno == EINTR))
1880 did_retry = 1;
1882 /* If close is interrupted SunOS 4.1 may or may not have closed the
1883 file descriptor. If it did the second close will fail with
1884 errno = EBADF. That means we have succeeded. */
1885 if (rtnval == -1 && did_retry && errno == EBADF)
1886 return 0;
1888 return rtnval;
1891 /* Maximum number of bytes to read or write in a single system call.
1892 This works around a serious bug in Linux kernels before 2.6.16; see
1893 <https://bugzilla.redhat.com/show_bug.cgi?format=multiple&id=612839>.
1894 It's likely to work around similar bugs in other operating systems, so do it
1895 on all platforms. Round INT_MAX down to a page size, with the conservative
1896 assumption that page sizes are at most 2**18 bytes (any kernel with a
1897 page size larger than that shouldn't have the bug). */
1898 #ifndef MAX_RW_COUNT
1899 #define MAX_RW_COUNT (INT_MAX >> 18 << 18)
1900 #endif
1902 /* Read from FILEDESC to a buffer BUF with size NBYTE, retrying if interrupted.
1903 Return the number of bytes read, which might be less than NBYTE.
1904 On error, set errno and return -1. */
1905 EMACS_INT
1906 emacs_read (int fildes, char *buf, EMACS_INT nbyte)
1908 register ssize_t rtnval;
1910 /* There is no need to check against MAX_RW_COUNT, since no caller ever
1911 passes a size that large to emacs_read. */
1913 while ((rtnval = read (fildes, buf, nbyte)) == -1
1914 && (errno == EINTR))
1915 QUIT;
1916 return (rtnval);
1919 /* Write to FILEDES from a buffer BUF with size NBYTE, retrying if interrupted
1920 or if a partial write occurs. Return the number of bytes written, setting
1921 errno if this is less than NBYTE. */
1922 EMACS_INT
1923 emacs_write (int fildes, const char *buf, EMACS_INT nbyte)
1925 ssize_t rtnval;
1926 EMACS_INT bytes_written;
1928 bytes_written = 0;
1930 while (nbyte > 0)
1932 rtnval = write (fildes, buf, min (nbyte, MAX_RW_COUNT));
1934 if (rtnval < 0)
1936 if (errno == EINTR)
1938 #ifdef SYNC_INPUT
1939 /* I originally used `QUIT' but that might causes files to
1940 be truncated if you hit C-g in the middle of it. --Stef */
1941 process_pending_signals ();
1942 #endif
1943 continue;
1945 else
1946 break;
1949 buf += rtnval;
1950 nbyte -= rtnval;
1951 bytes_written += rtnval;
1954 return (bytes_written);
1957 static struct allocator const emacs_norealloc_allocator =
1958 { xmalloc, NULL, xfree, memory_full };
1960 /* Get the symbolic link value of FILENAME. Return a pointer to a
1961 NUL-terminated string. If readlink fails, return NULL and set
1962 errno. If the value fits in INITIAL_BUF, return INITIAL_BUF.
1963 Otherwise, allocate memory and return a pointer to that memory. If
1964 memory allocation fails, diagnose and fail without returning. If
1965 successful, store the length of the symbolic link into *LINKLEN. */
1966 char *
1967 emacs_readlink (char const *filename, char initial_buf[READLINK_BUFSIZE])
1969 return careadlinkat (AT_FDCWD, filename, initial_buf, READLINK_BUFSIZE,
1970 &emacs_norealloc_allocator, careadlinkatcwd);
1973 #ifdef USG
1975 * All of the following are for USG.
1977 * On USG systems the system calls are INTERRUPTIBLE by signals
1978 * that the user program has elected to catch. Thus the system call
1979 * must be retried in these cases. To handle this without massive
1980 * changes in the source code, we remap the standard system call names
1981 * to names for our own functions in sysdep.c that do the system call
1982 * with retries. Actually, for portability reasons, it is good
1983 * programming practice, as this example shows, to limit all actual
1984 * system calls to a single occurrence in the source. Sure, this
1985 * adds an extra level of function call overhead but it is almost
1986 * always negligible. Fred Fish, Unisoft Systems Inc.
1990 * Warning, this function may not duplicate 4.2 action properly
1991 * under error conditions.
1994 #ifndef HAVE_GETWD
1996 #ifndef MAXPATHLEN
1997 /* In 4.1, param.h fails to define this. */
1998 #define MAXPATHLEN 1024
1999 #endif
2001 char *
2002 getwd (char *pathname)
2004 char *npath, *spath;
2005 extern char *getcwd (char *, size_t);
2007 BLOCK_INPUT; /* getcwd uses malloc */
2008 spath = npath = getcwd ((char *) 0, MAXPATHLEN);
2009 if (spath == 0)
2011 UNBLOCK_INPUT;
2012 return spath;
2014 /* On Altos 3068, getcwd can return @hostname/dir, so discard
2015 up to first slash. Should be harmless on other systems. */
2016 while (*npath && *npath != '/')
2017 npath++;
2018 strcpy (pathname, npath);
2019 free (spath); /* getcwd uses malloc */
2020 UNBLOCK_INPUT;
2021 return pathname;
2024 #endif /* HAVE_GETWD */
2027 * Emulate rename using unlink/link. Note that this is
2028 * only partially correct. Also, doesn't enforce restriction
2029 * that files be of same type (regular->regular, dir->dir, etc).
2032 #ifndef HAVE_RENAME
2035 rename (const char *from, const char *to)
2037 if (access (from, 0) == 0)
2039 unlink (to);
2040 if (link (from, to) == 0)
2041 if (unlink (from) == 0)
2042 return (0);
2044 return (-1);
2047 #endif
2050 #if defined (HPUX) && !defined (HAVE_PERROR)
2052 /* HPUX curses library references perror, but as far as we know
2053 it won't be called. Anyway this definition will do for now. */
2055 void
2056 perror (void)
2059 #endif /* HPUX and not HAVE_PERROR */
2062 * Gettimeofday. Simulate as much as possible. Only accurate
2063 * to nearest second. Emacs doesn't use tzp so ignore it for now.
2064 * Only needed when subprocesses are defined.
2067 #ifndef HAVE_GETTIMEOFDAY
2068 #ifdef HAVE_TIMEVAL
2071 gettimeofday (struct timeval *tp, struct timezone *tzp)
2073 extern long time (long);
2075 tp->tv_sec = time ((long *)0);
2076 tp->tv_usec = 0;
2077 if (tzp != 0)
2078 tzp->tz_minuteswest = -1;
2079 return 0;
2082 #endif
2083 #endif /* !HAVE_GETTIMEOFDAY && HAVE_TIMEVAL */
2086 * This function will go away as soon as all the stubs fixed. (fnf)
2089 void
2090 croak (char *badfunc)
2092 printf ("%s not yet implemented\r\n", badfunc);
2093 reset_all_sys_modes ();
2094 exit (1);
2097 #endif /* USG */
2099 /* Directory routines for systems that don't have them. */
2101 #ifdef HAVE_DIRENT_H
2103 #include <dirent.h>
2105 #if !defined (HAVE_CLOSEDIR)
2108 closedir (DIR *dirp /* stream from opendir */)
2110 int rtnval;
2112 rtnval = emacs_close (dirp->dd_fd);
2113 xfree ((char *) dirp);
2115 return rtnval;
2117 #endif /* not HAVE_CLOSEDIR */
2118 #endif /* HAVE_DIRENT_H */
2122 set_file_times (const char *filename, EMACS_TIME atime, EMACS_TIME mtime)
2124 #ifdef HAVE_UTIMES
2125 struct timeval tv[2];
2126 tv[0] = atime;
2127 tv[1] = mtime;
2128 return utimes (filename, tv);
2129 #else /* not HAVE_UTIMES */
2130 struct utimbuf utb;
2131 utb.actime = EMACS_SECS (atime);
2132 utb.modtime = EMACS_SECS (mtime);
2133 return utime (filename, &utb);
2134 #endif /* not HAVE_UTIMES */
2137 /* mkdir and rmdir functions, for systems which don't have them. */
2139 #ifndef HAVE_MKDIR
2141 * Written by Robert Rother, Mariah Corporation, August 1985.
2143 * If you want it, it's yours. All I ask in return is that if you
2144 * figure out how to do this in a Bourne Shell script you send me
2145 * a copy.
2146 * sdcsvax!rmr or rmr@uscd
2148 * Severely hacked over by John Gilmore to make a 4.2BSD compatible
2149 * subroutine. 11Mar86; hoptoad!gnu
2151 * Modified by rmtodd@uokmax 6-28-87 -- when making an already existing dir,
2152 * subroutine didn't return EEXIST. It does now.
2156 * Make a directory.
2159 mkdir (char *dpath, int dmode)
2161 int cpid, status, fd;
2162 struct stat statbuf;
2164 if (stat (dpath, &statbuf) == 0)
2166 errno = EEXIST; /* Stat worked, so it already exists */
2167 return -1;
2170 /* If stat fails for a reason other than non-existence, return error */
2171 if (errno != ENOENT)
2172 return -1;
2174 synch_process_alive = 1;
2175 switch (cpid = fork ())
2178 case -1: /* Error in fork */
2179 return (-1); /* Errno is set already */
2181 case 0: /* Child process */
2183 * Cheap hack to set mode of new directory. Since this
2184 * child process is going away anyway, we zap its umask.
2185 * FIXME, this won't suffice to set SUID, SGID, etc. on this
2186 * directory. Does anybody care?
2188 status = umask (0); /* Get current umask */
2189 status = umask (status | (0777 & ~dmode)); /* Set for mkdir */
2190 fd = emacs_open ("/dev/null", O_RDWR, 0);
2191 if (fd >= 0)
2193 dup2 (fd, 0);
2194 dup2 (fd, 1);
2195 dup2 (fd, 2);
2197 execl ("/bin/mkdir", "mkdir", dpath, (char *) 0);
2198 _exit (-1); /* Can't exec /bin/mkdir */
2200 default: /* Parent process */
2201 wait_for_termination (cpid);
2204 if (synch_process_death != 0 || synch_process_retcode != 0
2205 || synch_process_termsig != 0)
2207 errno = EIO; /* We don't know why, but */
2208 return -1; /* /bin/mkdir failed */
2211 return 0;
2213 #endif /* not HAVE_MKDIR */
2215 #ifndef HAVE_RMDIR
2217 rmdir (char *dpath)
2219 int cpid, status, fd;
2220 struct stat statbuf;
2222 if (stat (dpath, &statbuf) != 0)
2224 /* Stat just set errno. We don't have to */
2225 return -1;
2228 synch_process_alive = 1;
2229 switch (cpid = fork ())
2232 case -1: /* Error in fork */
2233 return (-1); /* Errno is set already */
2235 case 0: /* Child process */
2236 fd = emacs_open ("/dev/null", O_RDWR, 0);
2237 if (fd >= 0)
2239 dup2 (fd, 0);
2240 dup2 (fd, 1);
2241 dup2 (fd, 2);
2243 execl ("/bin/rmdir", "rmdir", dpath, (char *) 0);
2244 _exit (-1); /* Can't exec /bin/rmdir */
2246 default: /* Parent process */
2247 wait_for_termination (cpid);
2250 if (synch_process_death != 0 || synch_process_retcode != 0
2251 || synch_process_termsig != 0)
2253 errno = EIO; /* We don't know why, but */
2254 return -1; /* /bin/rmdir failed */
2257 return 0;
2259 #endif /* !HAVE_RMDIR */
2262 #ifndef HAVE_STRSIGNAL
2263 char *
2264 strsignal (int code)
2266 char *signame = 0;
2268 if (0 <= code && code < NSIG)
2270 /* Cast to suppress warning if the table has const char *. */
2271 signame = (char *) sys_siglist[code];
2274 return signame;
2276 #endif /* HAVE_STRSIGNAL */
2278 #ifndef DOS_NT
2279 /* For make-serial-process */
2281 serial_open (char *port)
2283 int fd = -1;
2285 fd = emacs_open ((char*) port,
2286 O_RDWR
2287 #ifdef O_NONBLOCK
2288 | O_NONBLOCK
2289 #else
2290 | O_NDELAY
2291 #endif
2292 #ifdef O_NOCTTY
2293 | O_NOCTTY
2294 #endif
2295 , 0);
2296 if (fd < 0)
2298 error ("Could not open %s: %s",
2299 port, emacs_strerror (errno));
2301 #ifdef TIOCEXCL
2302 ioctl (fd, TIOCEXCL, (char *) 0);
2303 #endif
2305 return fd;
2308 #if !defined (HAVE_CFMAKERAW)
2309 /* Workaround for targets which are missing cfmakeraw. */
2310 /* Pasted from man page. */
2311 static void
2312 cfmakeraw (struct termios *termios_p)
2314 termios_p->c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON);
2315 termios_p->c_oflag &= ~OPOST;
2316 termios_p->c_lflag &= ~(ECHO|ECHONL|ICANON|ISIG|IEXTEN);
2317 termios_p->c_cflag &= ~(CSIZE|PARENB);
2318 termios_p->c_cflag |= CS8;
2320 #endif /* !defined (HAVE_CFMAKERAW */
2322 #if !defined (HAVE_CFSETSPEED)
2323 /* Workaround for targets which are missing cfsetspeed. */
2324 static int
2325 cfsetspeed (struct termios *termios_p, speed_t vitesse)
2327 return (cfsetispeed (termios_p, vitesse)
2328 + cfsetospeed (termios_p, vitesse));
2330 #endif
2332 /* For serial-process-configure */
2333 void
2334 serial_configure (struct Lisp_Process *p,
2335 Lisp_Object contact)
2337 Lisp_Object childp2 = Qnil;
2338 Lisp_Object tem = Qnil;
2339 struct termios attr;
2340 int err = -1;
2341 char summary[4] = "???"; /* This usually becomes "8N1". */
2343 childp2 = Fcopy_sequence (p->childp);
2345 /* Read port attributes and prepare default configuration. */
2346 err = tcgetattr (p->outfd, &attr);
2347 if (err != 0)
2348 error ("tcgetattr() failed: %s", emacs_strerror (errno));
2349 cfmakeraw (&attr);
2350 #if defined (CLOCAL)
2351 attr.c_cflag |= CLOCAL;
2352 #endif
2353 #if defined (CREAD)
2354 attr.c_cflag |= CREAD;
2355 #endif
2357 /* Configure speed. */
2358 if (!NILP (Fplist_member (contact, QCspeed)))
2359 tem = Fplist_get (contact, QCspeed);
2360 else
2361 tem = Fplist_get (p->childp, QCspeed);
2362 CHECK_NUMBER (tem);
2363 err = cfsetspeed (&attr, XINT (tem));
2364 if (err != 0)
2365 error ("cfsetspeed(%"pI"d) failed: %s", XINT (tem),
2366 emacs_strerror (errno));
2367 childp2 = Fplist_put (childp2, QCspeed, tem);
2369 /* Configure bytesize. */
2370 if (!NILP (Fplist_member (contact, QCbytesize)))
2371 tem = Fplist_get (contact, QCbytesize);
2372 else
2373 tem = Fplist_get (p->childp, QCbytesize);
2374 if (NILP (tem))
2375 tem = make_number (8);
2376 CHECK_NUMBER (tem);
2377 if (XINT (tem) != 7 && XINT (tem) != 8)
2378 error (":bytesize must be nil (8), 7, or 8");
2379 summary[0] = XINT (tem) + '0';
2380 #if defined (CSIZE) && defined (CS7) && defined (CS8)
2381 attr.c_cflag &= ~CSIZE;
2382 attr.c_cflag |= ((XINT (tem) == 7) ? CS7 : CS8);
2383 #else
2384 /* Don't error on bytesize 8, which should be set by cfmakeraw. */
2385 if (XINT (tem) != 8)
2386 error ("Bytesize cannot be changed");
2387 #endif
2388 childp2 = Fplist_put (childp2, QCbytesize, tem);
2390 /* Configure parity. */
2391 if (!NILP (Fplist_member (contact, QCparity)))
2392 tem = Fplist_get (contact, QCparity);
2393 else
2394 tem = Fplist_get (p->childp, QCparity);
2395 if (!NILP (tem) && !EQ (tem, Qeven) && !EQ (tem, Qodd))
2396 error (":parity must be nil (no parity), `even', or `odd'");
2397 #if defined (PARENB) && defined (PARODD) && defined (IGNPAR) && defined (INPCK)
2398 attr.c_cflag &= ~(PARENB | PARODD);
2399 attr.c_iflag &= ~(IGNPAR | INPCK);
2400 if (NILP (tem))
2402 summary[1] = 'N';
2404 else if (EQ (tem, Qeven))
2406 summary[1] = 'E';
2407 attr.c_cflag |= PARENB;
2408 attr.c_iflag |= (IGNPAR | INPCK);
2410 else if (EQ (tem, Qodd))
2412 summary[1] = 'O';
2413 attr.c_cflag |= (PARENB | PARODD);
2414 attr.c_iflag |= (IGNPAR | INPCK);
2416 #else
2417 /* Don't error on no parity, which should be set by cfmakeraw. */
2418 if (!NILP (tem))
2419 error ("Parity cannot be configured");
2420 #endif
2421 childp2 = Fplist_put (childp2, QCparity, tem);
2423 /* Configure stopbits. */
2424 if (!NILP (Fplist_member (contact, QCstopbits)))
2425 tem = Fplist_get (contact, QCstopbits);
2426 else
2427 tem = Fplist_get (p->childp, QCstopbits);
2428 if (NILP (tem))
2429 tem = make_number (1);
2430 CHECK_NUMBER (tem);
2431 if (XINT (tem) != 1 && XINT (tem) != 2)
2432 error (":stopbits must be nil (1 stopbit), 1, or 2");
2433 summary[2] = XINT (tem) + '0';
2434 #if defined (CSTOPB)
2435 attr.c_cflag &= ~CSTOPB;
2436 if (XINT (tem) == 2)
2437 attr.c_cflag |= CSTOPB;
2438 #else
2439 /* Don't error on 1 stopbit, which should be set by cfmakeraw. */
2440 if (XINT (tem) != 1)
2441 error ("Stopbits cannot be configured");
2442 #endif
2443 childp2 = Fplist_put (childp2, QCstopbits, tem);
2445 /* Configure flowcontrol. */
2446 if (!NILP (Fplist_member (contact, QCflowcontrol)))
2447 tem = Fplist_get (contact, QCflowcontrol);
2448 else
2449 tem = Fplist_get (p->childp, QCflowcontrol);
2450 if (!NILP (tem) && !EQ (tem, Qhw) && !EQ (tem, Qsw))
2451 error (":flowcontrol must be nil (no flowcontrol), `hw', or `sw'");
2452 #if defined (CRTSCTS)
2453 attr.c_cflag &= ~CRTSCTS;
2454 #endif
2455 #if defined (CNEW_RTSCTS)
2456 attr.c_cflag &= ~CNEW_RTSCTS;
2457 #endif
2458 #if defined (IXON) && defined (IXOFF)
2459 attr.c_iflag &= ~(IXON | IXOFF);
2460 #endif
2461 if (NILP (tem))
2463 /* Already configured. */
2465 else if (EQ (tem, Qhw))
2467 #if defined (CRTSCTS)
2468 attr.c_cflag |= CRTSCTS;
2469 #elif defined (CNEW_RTSCTS)
2470 attr.c_cflag |= CNEW_RTSCTS;
2471 #else
2472 error ("Hardware flowcontrol (RTS/CTS) not supported");
2473 #endif
2475 else if (EQ (tem, Qsw))
2477 #if defined (IXON) && defined (IXOFF)
2478 attr.c_iflag |= (IXON | IXOFF);
2479 #else
2480 error ("Software flowcontrol (XON/XOFF) not supported");
2481 #endif
2483 childp2 = Fplist_put (childp2, QCflowcontrol, tem);
2485 /* Activate configuration. */
2486 err = tcsetattr (p->outfd, TCSANOW, &attr);
2487 if (err != 0)
2488 error ("tcsetattr() failed: %s", emacs_strerror (errno));
2490 childp2 = Fplist_put (childp2, QCsummary, build_string (summary));
2491 p->childp = childp2;
2494 #endif /* not DOS_NT */
2496 /* System depended enumeration of and access to system processes a-la ps(1). */
2498 #ifdef HAVE_PROCFS
2500 /* Process enumeration and access via /proc. */
2502 Lisp_Object
2503 list_system_processes (void)
2505 Lisp_Object procdir, match, proclist, next;
2506 struct gcpro gcpro1, gcpro2;
2507 register Lisp_Object tail;
2509 GCPRO2 (procdir, match);
2510 /* For every process on the system, there's a directory in the
2511 "/proc" pseudo-directory whose name is the numeric ID of that
2512 process. */
2513 procdir = build_string ("/proc");
2514 match = build_string ("[0-9]+");
2515 proclist = directory_files_internal (procdir, Qnil, match, Qt, 0, Qnil);
2517 /* `proclist' gives process IDs as strings. Destructively convert
2518 each string into a number. */
2519 for (tail = proclist; CONSP (tail); tail = next)
2521 next = XCDR (tail);
2522 XSETCAR (tail, Fstring_to_number (XCAR (tail), Qnil));
2524 UNGCPRO;
2526 /* directory_files_internal returns the files in reverse order; undo
2527 that. */
2528 proclist = Fnreverse (proclist);
2529 return proclist;
2532 /* The WINDOWSNT implementation is in w32.c.
2533 The MSDOS implementation is in dosfns.c. */
2534 #elif !defined (WINDOWSNT) && !defined (MSDOS)
2536 Lisp_Object
2537 list_system_processes (void)
2539 return Qnil;
2542 #endif /* !defined (WINDOWSNT) */
2544 #ifdef GNU_LINUX
2545 static void
2546 time_from_jiffies (unsigned long long tval, long hz,
2547 time_t *sec, unsigned *usec)
2549 unsigned long long ullsec;
2551 *sec = tval / hz;
2552 ullsec = *sec;
2553 tval -= ullsec * hz;
2554 /* Careful: if HZ > 1 million, then integer division by it yields zero. */
2555 if (hz <= 1000000)
2556 *usec = tval * 1000000 / hz;
2557 else
2558 *usec = tval / (hz / 1000000);
2561 static Lisp_Object
2562 ltime_from_jiffies (unsigned long long tval, long hz)
2564 time_t sec;
2565 unsigned usec;
2567 time_from_jiffies (tval, hz, &sec, &usec);
2569 return list3 (make_number ((sec >> 16) & 0xffff),
2570 make_number (sec & 0xffff),
2571 make_number (usec));
2574 static void
2575 get_up_time (time_t *sec, unsigned *usec)
2577 FILE *fup;
2579 *sec = *usec = 0;
2581 BLOCK_INPUT;
2582 fup = fopen ("/proc/uptime", "r");
2584 if (fup)
2586 double uptime, idletime;
2588 /* The numbers in /proc/uptime use C-locale decimal point, but
2589 we already set ourselves to the C locale (see `fixup_locale'
2590 in emacs.c). */
2591 if (2 <= fscanf (fup, "%lf %lf", &uptime, &idletime))
2593 *sec = uptime;
2594 *usec = (uptime - *sec) * 1000000;
2596 fclose (fup);
2598 UNBLOCK_INPUT;
2601 #define MAJOR(d) (((unsigned)(d) >> 8) & 0xfff)
2602 #define MINOR(d) (((unsigned)(d) & 0xff) | (((unsigned)(d) & 0xfff00000) >> 12))
2604 static Lisp_Object
2605 procfs_ttyname (int rdev)
2607 FILE *fdev = NULL;
2608 char name[PATH_MAX];
2610 BLOCK_INPUT;
2611 fdev = fopen ("/proc/tty/drivers", "r");
2613 if (fdev)
2615 unsigned major;
2616 unsigned long minor_beg, minor_end;
2617 char minor[25]; /* 2 32-bit numbers + dash */
2618 char *endp;
2620 while (!feof (fdev) && !ferror (fdev))
2622 if (3 <= fscanf (fdev, "%*s %s %u %s %*s\n", name, &major, minor)
2623 && major == MAJOR (rdev))
2625 minor_beg = strtoul (minor, &endp, 0);
2626 if (*endp == '\0')
2627 minor_end = minor_beg;
2628 else if (*endp == '-')
2629 minor_end = strtoul (endp + 1, &endp, 0);
2630 else
2631 continue;
2633 if (MINOR (rdev) >= minor_beg && MINOR (rdev) <= minor_end)
2635 sprintf (name + strlen (name), "%u", MINOR (rdev));
2636 break;
2640 fclose (fdev);
2642 UNBLOCK_INPUT;
2643 return build_string (name);
2646 static unsigned long
2647 procfs_get_total_memory (void)
2649 FILE *fmem = NULL;
2650 unsigned long retval = 2 * 1024 * 1024; /* default: 2GB */
2652 BLOCK_INPUT;
2653 fmem = fopen ("/proc/meminfo", "r");
2655 if (fmem)
2657 unsigned long entry_value;
2658 char entry_name[20]; /* the longest I saw is 13+1 */
2660 while (!feof (fmem) && !ferror (fmem))
2662 if (2 <= fscanf (fmem, "%s %lu kB\n", entry_name, &entry_value)
2663 && strcmp (entry_name, "MemTotal:") == 0)
2665 retval = entry_value;
2666 break;
2669 fclose (fmem);
2671 UNBLOCK_INPUT;
2672 return retval;
2675 Lisp_Object
2676 system_process_attributes (Lisp_Object pid)
2678 char procfn[PATH_MAX], fn[PATH_MAX];
2679 struct stat st;
2680 struct passwd *pw;
2681 struct group *gr;
2682 long clocks_per_sec;
2683 char *procfn_end;
2684 char procbuf[1025], *p, *q;
2685 int fd;
2686 ssize_t nread;
2687 const char *cmd = NULL;
2688 char *cmdline = NULL;
2689 ptrdiff_t cmdsize = 0, cmdline_size;
2690 unsigned char c;
2691 int proc_id, ppid, uid, gid, pgrp, sess, tty, tpgid, thcount;
2692 unsigned long long u_time, s_time, cutime, cstime, start;
2693 long priority, niceness, rss;
2694 unsigned long minflt, majflt, cminflt, cmajflt, vsize;
2695 time_t sec;
2696 unsigned usec;
2697 EMACS_TIME tnow, tstart, tboot, telapsed;
2698 double pcpu, pmem;
2699 Lisp_Object attrs = Qnil;
2700 Lisp_Object cmd_str, decoded_cmd, tem;
2701 struct gcpro gcpro1, gcpro2;
2702 EMACS_INT uid_eint, gid_eint;
2704 CHECK_NUMBER_OR_FLOAT (pid);
2705 proc_id = FLOATP (pid) ? XFLOAT_DATA (pid) : XINT (pid);
2706 sprintf (procfn, "/proc/%u", proc_id);
2707 if (stat (procfn, &st) < 0)
2708 return attrs;
2710 GCPRO2 (attrs, decoded_cmd);
2712 /* euid egid */
2713 uid = st.st_uid;
2714 /* Use of EMACS_INT stops GCC whining about limited range of data type. */
2715 uid_eint = uid;
2716 attrs = Fcons (Fcons (Qeuid, make_fixnum_or_float (uid_eint)), attrs);
2717 BLOCK_INPUT;
2718 pw = getpwuid (uid);
2719 UNBLOCK_INPUT;
2720 if (pw)
2721 attrs = Fcons (Fcons (Quser, build_string (pw->pw_name)), attrs);
2723 gid = st.st_gid;
2724 gid_eint = gid;
2725 attrs = Fcons (Fcons (Qegid, make_fixnum_or_float (gid_eint)), attrs);
2726 BLOCK_INPUT;
2727 gr = getgrgid (gid);
2728 UNBLOCK_INPUT;
2729 if (gr)
2730 attrs = Fcons (Fcons (Qgroup, build_string (gr->gr_name)), attrs);
2732 strcpy (fn, procfn);
2733 procfn_end = fn + strlen (fn);
2734 strcpy (procfn_end, "/stat");
2735 fd = emacs_open (fn, O_RDONLY, 0);
2736 if (fd >= 0 && (nread = emacs_read (fd, procbuf, sizeof (procbuf) - 1)) > 0)
2738 procbuf[nread] = '\0';
2739 p = procbuf;
2741 p = strchr (p, '(');
2742 if (p != NULL)
2744 q = strrchr (p + 1, ')');
2745 /* comm */
2746 if (q != NULL)
2748 cmd = p + 1;
2749 cmdsize = q - cmd;
2752 else
2753 q = NULL;
2754 if (cmd == NULL)
2756 cmd = "???";
2757 cmdsize = 3;
2759 /* Command name is encoded in locale-coding-system; decode it. */
2760 cmd_str = make_unibyte_string (cmd, cmdsize);
2761 decoded_cmd = code_convert_string_norecord (cmd_str,
2762 Vlocale_coding_system, 0);
2763 attrs = Fcons (Fcons (Qcomm, decoded_cmd), attrs);
2765 if (q)
2767 EMACS_INT ppid_eint, pgrp_eint, sess_eint, tpgid_eint, thcount_eint;
2768 p = q + 2;
2769 /* state ppid pgrp sess tty tpgid . minflt cminflt majflt cmajflt utime stime cutime cstime priority nice thcount . start vsize rss */
2770 sscanf (p, "%c %d %d %d %d %d %*u %lu %lu %lu %lu %Lu %Lu %Lu %Lu %ld %ld %d %*d %Lu %lu %ld",
2771 &c, &ppid, &pgrp, &sess, &tty, &tpgid,
2772 &minflt, &cminflt, &majflt, &cmajflt,
2773 &u_time, &s_time, &cutime, &cstime,
2774 &priority, &niceness, &thcount, &start, &vsize, &rss);
2776 char state_str[2];
2778 state_str[0] = c;
2779 state_str[1] = '\0';
2780 tem = build_string (state_str);
2781 attrs = Fcons (Fcons (Qstate, tem), attrs);
2783 /* Stops GCC whining about limited range of data type. */
2784 ppid_eint = ppid;
2785 pgrp_eint = pgrp;
2786 sess_eint = sess;
2787 tpgid_eint = tpgid;
2788 thcount_eint = thcount;
2789 attrs = Fcons (Fcons (Qppid, make_fixnum_or_float (ppid_eint)), attrs);
2790 attrs = Fcons (Fcons (Qpgrp, make_fixnum_or_float (pgrp_eint)), attrs);
2791 attrs = Fcons (Fcons (Qsess, make_fixnum_or_float (sess_eint)), attrs);
2792 attrs = Fcons (Fcons (Qttname, procfs_ttyname (tty)), attrs);
2793 attrs = Fcons (Fcons (Qtpgid, make_fixnum_or_float (tpgid_eint)), attrs);
2794 attrs = Fcons (Fcons (Qminflt, make_fixnum_or_float (minflt)), attrs);
2795 attrs = Fcons (Fcons (Qmajflt, make_fixnum_or_float (majflt)), attrs);
2796 attrs = Fcons (Fcons (Qcminflt, make_fixnum_or_float (cminflt)), attrs);
2797 attrs = Fcons (Fcons (Qcmajflt, make_fixnum_or_float (cmajflt)), attrs);
2798 clocks_per_sec = sysconf (_SC_CLK_TCK);
2799 if (clocks_per_sec < 0)
2800 clocks_per_sec = 100;
2801 attrs = Fcons (Fcons (Qutime,
2802 ltime_from_jiffies (u_time, clocks_per_sec)),
2803 attrs);
2804 attrs = Fcons (Fcons (Qstime,
2805 ltime_from_jiffies (s_time, clocks_per_sec)),
2806 attrs);
2807 attrs = Fcons (Fcons (Qtime,
2808 ltime_from_jiffies (s_time + u_time,
2809 clocks_per_sec)),
2810 attrs);
2811 attrs = Fcons (Fcons (Qcutime,
2812 ltime_from_jiffies (cutime, clocks_per_sec)),
2813 attrs);
2814 attrs = Fcons (Fcons (Qcstime,
2815 ltime_from_jiffies (cstime, clocks_per_sec)),
2816 attrs);
2817 attrs = Fcons (Fcons (Qctime,
2818 ltime_from_jiffies (cstime+cutime, clocks_per_sec)),
2819 attrs);
2820 attrs = Fcons (Fcons (Qpri, make_number (priority)), attrs);
2821 attrs = Fcons (Fcons (Qnice, make_number (niceness)), attrs);
2822 attrs = Fcons (Fcons (Qthcount, make_fixnum_or_float (thcount_eint)), attrs);
2823 EMACS_GET_TIME (tnow);
2824 get_up_time (&sec, &usec);
2825 EMACS_SET_SECS (telapsed, sec);
2826 EMACS_SET_USECS (telapsed, usec);
2827 EMACS_SUB_TIME (tboot, tnow, telapsed);
2828 time_from_jiffies (start, clocks_per_sec, &sec, &usec);
2829 EMACS_SET_SECS (tstart, sec);
2830 EMACS_SET_USECS (tstart, usec);
2831 EMACS_ADD_TIME (tstart, tboot, tstart);
2832 attrs = Fcons (Fcons (Qstart,
2833 list3 (make_number
2834 ((EMACS_SECS (tstart) >> 16) & 0xffff),
2835 make_number
2836 (EMACS_SECS (tstart) & 0xffff),
2837 make_number
2838 (EMACS_USECS (tstart)))),
2839 attrs);
2840 attrs = Fcons (Fcons (Qvsize, make_fixnum_or_float (vsize/1024)), attrs);
2841 attrs = Fcons (Fcons (Qrss, make_fixnum_or_float (4*rss)), attrs);
2842 EMACS_SUB_TIME (telapsed, tnow, tstart);
2843 attrs = Fcons (Fcons (Qetime,
2844 list3 (make_number
2845 ((EMACS_SECS (telapsed) >> 16) & 0xffff),
2846 make_number
2847 (EMACS_SECS (telapsed) & 0xffff),
2848 make_number
2849 (EMACS_USECS (telapsed)))),
2850 attrs);
2851 time_from_jiffies (u_time + s_time, clocks_per_sec, &sec, &usec);
2852 pcpu = (sec + usec / 1000000.0) / (EMACS_SECS (telapsed) + EMACS_USECS (telapsed) / 1000000.0);
2853 if (pcpu > 1.0)
2854 pcpu = 1.0;
2855 attrs = Fcons (Fcons (Qpcpu, make_float (100 * pcpu)), attrs);
2856 pmem = 4.0 * 100 * rss / procfs_get_total_memory ();
2857 if (pmem > 100)
2858 pmem = 100;
2859 attrs = Fcons (Fcons (Qpmem, make_float (pmem)), attrs);
2862 if (fd >= 0)
2863 emacs_close (fd);
2865 /* args */
2866 strcpy (procfn_end, "/cmdline");
2867 fd = emacs_open (fn, O_RDONLY, 0);
2868 if (fd >= 0)
2870 char ch;
2871 for (cmdline_size = 0; cmdline_size < STRING_BYTES_BOUND; cmdline_size++)
2873 if (emacs_read (fd, &ch, 1) != 1)
2874 break;
2875 c = ch;
2876 if (isspace (c) || c == '\\')
2877 cmdline_size++; /* for later quoting, see below */
2879 if (cmdline_size)
2881 cmdline = xmalloc (cmdline_size + 1);
2882 lseek (fd, 0L, SEEK_SET);
2883 cmdline[0] = '\0';
2884 if ((nread = read (fd, cmdline, cmdline_size)) >= 0)
2885 cmdline[nread++] = '\0';
2886 else
2888 /* Assigning zero to `nread' makes us skip the following
2889 two loops, assign zero to cmdline_size, and enter the
2890 following `if' clause that handles unknown command
2891 lines. */
2892 nread = 0;
2894 /* We don't want trailing null characters. */
2895 for (p = cmdline + nread; p > cmdline + 1 && !p[-1]; p--)
2896 nread--;
2897 for (p = cmdline; p < cmdline + nread; p++)
2899 /* Escape-quote whitespace and backslashes. */
2900 if (isspace (*p) || *p == '\\')
2902 memmove (p + 1, p, nread - (p - cmdline));
2903 nread++;
2904 *p++ = '\\';
2906 else if (*p == '\0')
2907 *p = ' ';
2909 cmdline_size = nread;
2911 if (!cmdline_size)
2913 if (!cmd)
2914 cmd = "???";
2915 if (!cmdsize)
2916 cmdsize = strlen (cmd);
2917 cmdline_size = cmdsize + 2;
2918 cmdline = xmalloc (cmdline_size + 1);
2919 strcpy (cmdline, "[");
2920 strcat (strncat (cmdline, cmd, cmdsize), "]");
2922 emacs_close (fd);
2923 /* Command line is encoded in locale-coding-system; decode it. */
2924 cmd_str = make_unibyte_string (cmdline, cmdline_size);
2925 decoded_cmd = code_convert_string_norecord (cmd_str,
2926 Vlocale_coding_system, 0);
2927 xfree (cmdline);
2928 attrs = Fcons (Fcons (Qargs, decoded_cmd), attrs);
2931 UNGCPRO;
2932 return attrs;
2935 #elif defined (SOLARIS2) && defined (HAVE_PROCFS)
2937 /* The <procfs.h> header does not like to be included if _LP64 is defined and
2938 __FILE_OFFSET_BITS == 64. This is an ugly workaround that. */
2939 #if !defined (_LP64) && defined (_FILE_OFFSET_BITS) && (_FILE_OFFSET_BITS == 64)
2940 #define PROCFS_FILE_OFFSET_BITS_HACK 1
2941 #undef _FILE_OFFSET_BITS
2942 #else
2943 #define PROCFS_FILE_OFFSET_BITS_HACK 0
2944 #endif
2946 #include <procfs.h>
2948 #if PROCFS_FILE_OFFSET_BITS_HACK == 1
2949 #define _FILE_OFFSET_BITS 64
2950 #ifdef _FILE_OFFSET_BITS /* Avoid unused-macro warnings. */
2951 #endif
2952 #endif /* PROCFS_FILE_OFFSET_BITS_HACK == 1 */
2954 Lisp_Object
2955 system_process_attributes (Lisp_Object pid)
2957 char procfn[PATH_MAX], fn[PATH_MAX];
2958 struct stat st;
2959 struct passwd *pw;
2960 struct group *gr;
2961 char *procfn_end;
2962 struct psinfo pinfo;
2963 int fd;
2964 ssize_t nread;
2965 int proc_id, uid, gid;
2966 Lisp_Object attrs = Qnil;
2967 Lisp_Object decoded_cmd, tem;
2968 struct gcpro gcpro1, gcpro2;
2969 EMACS_INT uid_eint, gid_eint;
2971 CHECK_NUMBER_OR_FLOAT (pid);
2972 proc_id = FLOATP (pid) ? XFLOAT_DATA (pid) : XINT (pid);
2973 sprintf (procfn, "/proc/%u", proc_id);
2974 if (stat (procfn, &st) < 0)
2975 return attrs;
2977 GCPRO2 (attrs, decoded_cmd);
2979 /* euid egid */
2980 uid = st.st_uid;
2981 /* Use of EMACS_INT stops GCC whining about limited range of data type. */
2982 uid_eint = uid;
2983 attrs = Fcons (Fcons (Qeuid, make_fixnum_or_float (uid_eint)), attrs);
2984 BLOCK_INPUT;
2985 pw = getpwuid (uid);
2986 UNBLOCK_INPUT;
2987 if (pw)
2988 attrs = Fcons (Fcons (Quser, build_string (pw->pw_name)), attrs);
2990 gid = st.st_gid;
2991 gid_eint = gid;
2992 attrs = Fcons (Fcons (Qegid, make_fixnum_or_float (gid_eint)), attrs);
2993 BLOCK_INPUT;
2994 gr = getgrgid (gid);
2995 UNBLOCK_INPUT;
2996 if (gr)
2997 attrs = Fcons (Fcons (Qgroup, build_string (gr->gr_name)), attrs);
2999 strcpy (fn, procfn);
3000 procfn_end = fn + strlen (fn);
3001 strcpy (procfn_end, "/psinfo");
3002 fd = emacs_open (fn, O_RDONLY, 0);
3003 if (fd >= 0
3004 && (nread = read (fd, (char*)&pinfo, sizeof (struct psinfo)) > 0))
3006 attrs = Fcons (Fcons (Qppid, make_fixnum_or_float (pinfo.pr_ppid)), attrs);
3007 attrs = Fcons (Fcons (Qpgrp, make_fixnum_or_float (pinfo.pr_pgid)), attrs);
3008 attrs = Fcons (Fcons (Qsess, make_fixnum_or_float (pinfo.pr_sid)), attrs);
3011 char state_str[2];
3012 state_str[0] = pinfo.pr_lwp.pr_sname;
3013 state_str[1] = '\0';
3014 tem = build_string (state_str);
3015 attrs = Fcons (Fcons (Qstate, tem), attrs);
3018 /* FIXME: missing Qttyname. psinfo.pr_ttydev is a dev_t,
3019 need to get a string from it. */
3021 /* FIXME: missing: Qtpgid */
3023 /* FIXME: missing:
3024 Qminflt
3025 Qmajflt
3026 Qcminflt
3027 Qcmajflt
3029 Qutime
3030 Qcutime
3031 Qstime
3032 Qcstime
3033 Are they available? */
3035 attrs = Fcons (Fcons (Qtime,
3036 list3 (make_number (pinfo.pr_time.tv_sec >> 16),
3037 make_number (pinfo.pr_time.tv_sec & 0xffff),
3038 make_number (pinfo.pr_time.tv_nsec))),
3039 attrs);
3041 attrs = Fcons (Fcons (Qctime,
3042 list3 (make_number (pinfo.pr_ctime.tv_sec >> 16),
3043 make_number (pinfo.pr_ctime.tv_sec & 0xffff),
3044 make_number (pinfo.pr_ctime.tv_nsec))),
3045 attrs);
3047 attrs = Fcons (Fcons (Qpri, make_number (pinfo.pr_lwp.pr_pri)), attrs);
3048 attrs = Fcons (Fcons (Qnice, make_number (pinfo.pr_lwp.pr_nice)), attrs);
3049 attrs = Fcons (Fcons (Qthcount, make_fixnum_or_float (pinfo.pr_nlwp)), attrs);
3051 attrs = Fcons (Fcons (Qstart,
3052 list3 (make_number (pinfo.pr_start.tv_sec >> 16),
3053 make_number (pinfo.pr_start.tv_sec & 0xffff),
3054 make_number (pinfo.pr_start.tv_nsec))),
3055 attrs);
3056 attrs = Fcons (Fcons (Qvsize, make_fixnum_or_float (pinfo.pr_size)), attrs);
3057 attrs = Fcons (Fcons (Qrss, make_fixnum_or_float (pinfo.pr_rssize)), attrs);
3059 /* pr_pctcpu and pr_pctmem are encoded as a fixed point 16 bit number in [0 ... 1]. */
3060 attrs = Fcons (Fcons (Qpcpu, (pinfo.pr_pctcpu * 100.0) / (double)0x8000), attrs);
3061 attrs = Fcons (Fcons (Qpmem, (pinfo.pr_pctmem * 100.0) / (double)0x8000), attrs);
3063 decoded_cmd
3064 = code_convert_string_norecord (make_unibyte_string (pinfo.pr_fname,
3065 strlen (pinfo.pr_fname)),
3066 Vlocale_coding_system, 0);
3067 attrs = Fcons (Fcons (Qcomm, decoded_cmd), attrs);
3068 decoded_cmd
3069 = code_convert_string_norecord (make_unibyte_string (pinfo.pr_psargs,
3070 strlen (pinfo.pr_psargs)),
3071 Vlocale_coding_system, 0);
3072 attrs = Fcons (Fcons (Qargs, decoded_cmd), attrs);
3075 if (fd >= 0)
3076 emacs_close (fd);
3078 UNGCPRO;
3079 return attrs;
3082 /* The WINDOWSNT implementation is in w32.c.
3083 The MSDOS implementation is in dosfns.c. */
3084 #elif !defined (WINDOWSNT) && !defined (MSDOS)
3086 Lisp_Object
3087 system_process_attributes (Lisp_Object pid)
3089 return Qnil;
3092 #endif /* !defined (WINDOWSNT) */