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* sound.c: Don't assume sizes fit in 'int'.
[bpt/emacs.git] / src / sysdep.c
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1/* Interfaces to system-dependent kernel and library entries.
2 Copyright (C) 1985-1988, 1993-1995, 1999-2011
3 Free Software Foundation, Inc.
4
5This file is part of GNU Emacs.
6
7GNU Emacs is free software: you can redistribute it and/or modify
8it under the terms of the GNU General Public License as published by
9the Free Software Foundation, either version 3 of the License, or
10(at your option) any later version.
11
12GNU Emacs is distributed in the hope that it will be useful,
13but WITHOUT ANY WARRANTY; without even the implied warranty of
14MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15GNU General Public License for more details.
16
17You should have received a copy of the GNU General Public License
18along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
19
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#ifdef HAVE_LIMITS_H
30#include <limits.h>
31#endif /* HAVE_LIMITS_H */
32#include <unistd.h>
33
34#include <allocator.h>
35#include <careadlinkat.h>
36#include <ignore-value.h>
37
38#include "lisp.h"
39#include "sysselect.h"
40#include "blockinput.h"
41
42#ifdef WINDOWSNT
43#define read sys_read
44#define write sys_write
45#include <windows.h>
46#ifndef NULL
47#define NULL 0
48#endif
49#endif /* not WINDOWSNT */
50
51#include <sys/types.h>
52#include <sys/stat.h>
53#include <errno.h>
54
55#ifdef HAVE_SETPGID
56#if !defined (USG)
57#undef setpgrp
58#define setpgrp setpgid
59#endif
60#endif
61
62/* Get SI_SRPC_DOMAIN, if it is available. */
63#ifdef HAVE_SYS_SYSTEMINFO_H
64#include <sys/systeminfo.h>
65#endif
66
67#ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida, MW Aug 1993 */
68#include <dos.h>
69#include "dosfns.h"
70#include "msdos.h"
71#include <sys/param.h>
72#endif
73
74#include <sys/file.h>
75#include <fcntl.h>
76
77#include "systty.h"
78#include "syswait.h"
79
80#ifdef HAVE_SYS_UTSNAME_H
81#include <sys/utsname.h>
82#include <memory.h>
83#endif /* HAVE_SYS_UTSNAME_H */
84
85#include "keyboard.h"
86#include "frame.h"
87#include "window.h"
88#include "termhooks.h"
89#include "termchar.h"
90#include "termopts.h"
91#include "dispextern.h"
92#include "process.h"
93#include "cm.h" /* for reset_sys_modes */
94
95#ifdef WINDOWSNT
96#include <direct.h>
97/* In process.h which conflicts with the local copy. */
98#define _P_WAIT 0
99int _cdecl _spawnlp (int, const char *, const char *, ...);
100int _cdecl _getpid (void);
101extern char *getwd (char *);
102#endif
103
104#include "syssignal.h"
105#include "systime.h"
106#ifdef HAVE_UTIME_H
107#include <utime.h>
108#endif
109
110#ifndef HAVE_UTIMES
111#ifndef HAVE_STRUCT_UTIMBUF
112/* We want to use utime rather than utimes, but we couldn't find the
113 structure declaration. We'll use the traditional one. */
114struct utimbuf {
115 long actime;
116 long modtime;
117};
118#endif
119#endif
120
121/* Declare here, including term.h is problematic on some systems. */
122extern void tputs (const char *, int, int (*)(int));
123
124static const int baud_convert[] =
125 {
126 0, 50, 75, 110, 135, 150, 200, 300, 600, 1200,
127 1800, 2400, 4800, 9600, 19200, 38400
128 };
129
130void croak (char *) NO_RETURN;
131
132/* Temporary used by `sigblock' when defined in terms of signprocmask. */
133
134SIGMASKTYPE sigprocmask_set;
135
136
137#if !defined (HAVE_GET_CURRENT_DIR_NAME) || defined (BROKEN_GET_CURRENT_DIR_NAME)
138
139/* Return the current working directory. Returns NULL on errors.
140 Any other returned value must be freed with free. This is used
141 only when get_current_dir_name is not defined on the system. */
142char*
143get_current_dir_name (void)
144{
145 char *buf;
146 char *pwd;
147 struct stat dotstat, pwdstat;
148 /* If PWD is accurate, use it instead of calling getwd. PWD is
149 sometimes a nicer name, and using it may avoid a fatal error if a
150 parent directory is searchable but not readable. */
151 if ((pwd = getenv ("PWD")) != 0
152 && (IS_DIRECTORY_SEP (*pwd) || (*pwd && IS_DEVICE_SEP (pwd[1])))
153 && stat (pwd, &pwdstat) == 0
154 && stat (".", &dotstat) == 0
155 && dotstat.st_ino == pwdstat.st_ino
156 && dotstat.st_dev == pwdstat.st_dev
157#ifdef MAXPATHLEN
158 && strlen (pwd) < MAXPATHLEN
159#endif
160 )
161 {
162 buf = (char *) malloc (strlen (pwd) + 1);
163 if (!buf)
164 return NULL;
165 strcpy (buf, pwd);
166 }
167#ifdef HAVE_GETCWD
168 else
169 {
170 size_t buf_size = 1024;
171 buf = (char *) malloc (buf_size);
172 if (!buf)
173 return NULL;
174 for (;;)
175 {
176 if (getcwd (buf, buf_size) == buf)
177 break;
178 if (errno != ERANGE)
179 {
180 int tmp_errno = errno;
181 free (buf);
182 errno = tmp_errno;
183 return NULL;
184 }
185 buf_size *= 2;
186 buf = (char *) realloc (buf, buf_size);
187 if (!buf)
188 return NULL;
189 }
190 }
191#else
192 else
193 {
194 /* We need MAXPATHLEN here. */
195 buf = (char *) malloc (MAXPATHLEN + 1);
196 if (!buf)
197 return NULL;
198 if (getwd (buf) == NULL)
199 {
200 int tmp_errno = errno;
201 free (buf);
202 errno = tmp_errno;
203 return NULL;
204 }
205 }
206#endif
207 return buf;
208}
209#endif
210
211\f
212/* Discard pending input on all input descriptors. */
213
214void
215discard_tty_input (void)
216{
217#ifndef WINDOWSNT
218 struct emacs_tty buf;
219
220 if (noninteractive)
221 return;
222
223#ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */
224 while (dos_keyread () != -1)
225 ;
226#else /* not MSDOS */
227 {
228 struct tty_display_info *tty;
229 for (tty = tty_list; tty; tty = tty->next)
230 {
231 if (tty->input) /* Is the device suspended? */
232 {
233 emacs_get_tty (fileno (tty->input), &buf);
234 emacs_set_tty (fileno (tty->input), &buf, 0);
235 }
236 }
237 }
238#endif /* not MSDOS */
239#endif /* not WINDOWSNT */
240}
241
242\f
243#ifdef SIGTSTP
244
245/* Arrange for character C to be read as the next input from
246 the terminal.
247 XXX What if we have multiple ttys?
248*/
249
250void
251stuff_char (char c)
252{
253 if (! FRAME_TERMCAP_P (SELECTED_FRAME ()))
254 return;
255
256/* Should perhaps error if in batch mode */
257#ifdef TIOCSTI
258 ioctl (fileno (CURTTY()->input), TIOCSTI, &c);
259#else /* no TIOCSTI */
260 error ("Cannot stuff terminal input characters in this version of Unix");
261#endif /* no TIOCSTI */
262}
263
264#endif /* SIGTSTP */
265\f
266void
267init_baud_rate (int fd)
268{
269 int emacs_ospeed;
270
271 if (noninteractive)
272 emacs_ospeed = 0;
273 else
274 {
275#ifdef DOS_NT
276 emacs_ospeed = 15;
277#else /* not DOS_NT */
278 struct termios sg;
279
280 sg.c_cflag = B9600;
281 tcgetattr (fd, &sg);
282 emacs_ospeed = cfgetospeed (&sg);
283#endif /* not DOS_NT */
284 }
285
286 baud_rate = (emacs_ospeed < sizeof baud_convert / sizeof baud_convert[0]
287 ? baud_convert[emacs_ospeed] : 9600);
288 if (baud_rate == 0)
289 baud_rate = 1200;
290}
291
292\f
293
294int wait_debugging; /* Set nonzero to make following function work under dbx
295 (at least for bsd). */
296
297#ifndef MSDOS
298/* Wait for subprocess with process id `pid' to terminate and
299 make sure it will get eliminated (not remain forever as a zombie) */
300
301void
302wait_for_termination (int pid)
303{
304 while (1)
305 {
306#if defined (BSD_SYSTEM) || defined (HPUX)
307 /* Note that kill returns -1 even if the process is just a zombie now.
308 But inevitably a SIGCHLD interrupt should be generated
309 and child_sig will do wait3 and make the process go away. */
310 /* There is some indication that there is a bug involved with
311 termination of subprocesses, perhaps involving a kernel bug too,
312 but no idea what it is. Just as a hunch we signal SIGCHLD to see
313 if that causes the problem to go away or get worse. */
314 sigsetmask (sigmask (SIGCHLD));
315 if (0 > kill (pid, 0))
316 {
317 sigsetmask (SIGEMPTYMASK);
318 kill (getpid (), SIGCHLD);
319 break;
320 }
321 if (wait_debugging)
322 sleep (1);
323 else
324 sigpause (SIGEMPTYMASK);
325#else /* not BSD_SYSTEM, and not HPUX version >= 6 */
326#ifdef WINDOWSNT
327 wait (0);
328 break;
329#else /* not WINDOWSNT */
330 sigblock (sigmask (SIGCHLD));
331 errno = 0;
332 if (kill (pid, 0) == -1 && errno == ESRCH)
333 {
334 sigunblock (sigmask (SIGCHLD));
335 break;
336 }
337
338 sigsuspend (&empty_mask);
339#endif /* not WINDOWSNT */
340#endif /* not BSD_SYSTEM, and not HPUX version >= 6 */
341 }
342}
343
344/*
345 * flush any pending output
346 * (may flush input as well; it does not matter the way we use it)
347 */
348
349void
350flush_pending_output (int channel)
351{
352 /* FIXME: maybe this function should be removed */
353}
354\f
355/* Set up the terminal at the other end of a pseudo-terminal that
356 we will be controlling an inferior through.
357 It should not echo or do line-editing, since that is done
358 in Emacs. No padding needed for insertion into an Emacs buffer. */
359
360void
361child_setup_tty (int out)
362{
363#ifndef WINDOWSNT
364 struct emacs_tty s;
365
366 emacs_get_tty (out, &s);
367 s.main.c_oflag |= OPOST; /* Enable output postprocessing */
368 s.main.c_oflag &= ~ONLCR; /* Disable map of NL to CR-NL on output */
369#ifdef NLDLY
370 /* http://lists.gnu.org/archive/html/emacs-devel/2008-05/msg00406.html
371 Some versions of GNU Hurd do not have FFDLY? */
372#ifdef FFDLY
373 s.main.c_oflag &= ~(NLDLY|CRDLY|TABDLY|BSDLY|VTDLY|FFDLY);
374 /* No output delays */
375#else
376 s.main.c_oflag &= ~(NLDLY|CRDLY|TABDLY|BSDLY|VTDLY);
377 /* No output delays */
378#endif
379#endif
380 s.main.c_lflag &= ~ECHO; /* Disable echo */
381 s.main.c_lflag |= ISIG; /* Enable signals */
382#ifdef IUCLC
383 s.main.c_iflag &= ~IUCLC; /* Disable downcasing on input. */
384#endif
385#ifdef ISTRIP
386 s.main.c_iflag &= ~ISTRIP; /* don't strip 8th bit on input */
387#endif
388#ifdef OLCUC
389 s.main.c_oflag &= ~OLCUC; /* Disable upcasing on output. */
390#endif
391 s.main.c_oflag &= ~TAB3; /* Disable tab expansion */
392 s.main.c_cflag = (s.main.c_cflag & ~CSIZE) | CS8; /* Don't strip 8th bit */
393 s.main.c_cc[VERASE] = CDISABLE; /* disable erase processing */
394 s.main.c_cc[VKILL] = CDISABLE; /* disable kill processing */
395
396#ifdef HPUX
397 s.main.c_cflag = (s.main.c_cflag & ~CBAUD) | B9600; /* baud rate sanity */
398#endif /* HPUX */
399
400#ifdef SIGNALS_VIA_CHARACTERS
401 /* the QUIT and INTR character are used in process_send_signal
402 so set them here to something useful. */
403 if (s.main.c_cc[VQUIT] == CDISABLE)
404 s.main.c_cc[VQUIT] = '\\'&037; /* Control-\ */
405 if (s.main.c_cc[VINTR] == CDISABLE)
406 s.main.c_cc[VINTR] = 'C'&037; /* Control-C */
407#endif /* not SIGNALS_VIA_CHARACTERS */
408
409#ifdef AIX
410 /* Also, PTY overloads NUL and BREAK.
411 don't ignore break, but don't signal either, so it looks like NUL. */
412 s.main.c_iflag &= ~IGNBRK;
413 s.main.c_iflag &= ~BRKINT;
414 /* rms: Formerly it set s.main.c_cc[VINTR] to 0377 here
415 unconditionally. Then a SIGNALS_VIA_CHARACTERS conditional
416 would force it to 0377. That looks like duplicated code. */
417 s.main.c_cflag = (s.main.c_cflag & ~CBAUD) | B9600; /* baud rate sanity */
418#endif /* AIX */
419
420 /* We originally enabled ICANON (and set VEOF to 04), and then had
421 proces.c send additional EOF chars to flush the output when faced
422 with long lines, but this leads to weird effects when the
423 subprocess has disabled ICANON and ends up seeing those spurious
424 extra EOFs. So we don't send EOFs any more in
425 process.c:send_process. First we tried to disable ICANON by
426 default, so if a subsprocess sets up ICANON, it's his problem (or
427 the Elisp package that talks to it) to deal with lines that are
428 too long. But this disables some features, such as the ability
429 to send EOF signals. So we re-enabled ICANON but there is no
430 more "send eof to flush" going on (which is wrong and unportable
431 in itself). The correct way to handle too much output is to
432 buffer what could not be written and then write it again when
433 select returns ok for writing. This has it own set of
434 problems. Write is now asynchronous, is that a problem? How much
435 do we buffer, and what do we do when that limit is reached? */
436
437 s.main.c_lflag |= ICANON; /* Enable line editing and eof processing */
438 s.main.c_cc[VEOF] = 'D'&037; /* Control-D */
439#if 0 /* These settings only apply to non-ICANON mode. */
440 s.main.c_cc[VMIN] = 1;
441 s.main.c_cc[VTIME] = 0;
442#endif
443
444 emacs_set_tty (out, &s, 0);
445#endif /* not WINDOWSNT */
446}
447#endif /* not MSDOS */
448
449\f
450/* Record a signal code and the handler for it. */
451struct save_signal
452{
453 int code;
454 void (*handler) (int);
455};
456
457static void save_signal_handlers (struct save_signal *);
458static void restore_signal_handlers (struct save_signal *);
459
460/* Suspend the Emacs process; give terminal to its superior. */
461
462void
463sys_suspend (void)
464{
465#if defined (SIGTSTP) && !defined (MSDOS)
466
467 {
468 int pgrp = EMACS_GETPGRP (0);
469 EMACS_KILLPG (pgrp, SIGTSTP);
470 }
471
472#else /* No SIGTSTP */
473/* On a system where suspending is not implemented,
474 instead fork a subshell and let it talk directly to the terminal
475 while we wait. */
476 sys_subshell ();
477
478#endif /* no SIGTSTP */
479}
480
481/* Fork a subshell. */
482
483void
484sys_subshell (void)
485{
486#ifdef DOS_NT /* Demacs 1.1.2 91/10/20 Manabu Higashida */
487 int st;
488 char oldwd[MAXPATHLEN+1]; /* Fixed length is safe on MSDOS. */
489#endif
490 int pid;
491 struct save_signal saved_handlers[5];
492 Lisp_Object dir;
493 unsigned char *volatile str_volatile = 0;
494 unsigned char *str;
495 int len;
496
497 saved_handlers[0].code = SIGINT;
498 saved_handlers[1].code = SIGQUIT;
499 saved_handlers[2].code = SIGTERM;
500#ifdef SIGIO
501 saved_handlers[3].code = SIGIO;
502 saved_handlers[4].code = 0;
503#else
504 saved_handlers[3].code = 0;
505#endif
506
507 /* Mentioning current_buffer->buffer would mean including buffer.h,
508 which somehow wedges the hp compiler. So instead... */
509
510 dir = intern ("default-directory");
511 if (NILP (Fboundp (dir)))
512 goto xyzzy;
513 dir = Fsymbol_value (dir);
514 if (!STRINGP (dir))
515 goto xyzzy;
516
517 dir = expand_and_dir_to_file (Funhandled_file_name_directory (dir), Qnil);
518 str_volatile = str = (unsigned char *) alloca (SCHARS (dir) + 2);
519 len = SCHARS (dir);
520 memcpy (str, SDATA (dir), len);
521 if (str[len - 1] != '/') str[len++] = '/';
522 str[len] = 0;
523 xyzzy:
524
525#ifdef DOS_NT
526 pid = 0;
527 save_signal_handlers (saved_handlers);
528 synch_process_alive = 1;
529#else
530 pid = vfork ();
531 if (pid == -1)
532 error ("Can't spawn subshell");
533#endif
534
535 if (pid == 0)
536 {
537 const char *sh = 0;
538
539#ifdef DOS_NT /* MW, Aug 1993 */
540 getwd (oldwd);
541 if (sh == 0)
542 sh = (char *) egetenv ("SUSPEND"); /* KFS, 1994-12-14 */
543#endif
544 if (sh == 0)
545 sh = (char *) egetenv ("SHELL");
546 if (sh == 0)
547 sh = "sh";
548
549 /* Use our buffer's default directory for the subshell. */
550 str = str_volatile;
551 if (str && chdir ((char *) str) != 0)
552 {
553#ifndef DOS_NT
554 ignore_value (write (1, "Can't chdir\n", 12));
555 _exit (1);
556#endif
557 }
558
559 close_process_descs (); /* Close Emacs's pipes/ptys */
560
561#ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */
562 {
563 char *epwd = getenv ("PWD");
564 char old_pwd[MAXPATHLEN+1+4];
565
566 /* If PWD is set, pass it with corrected value. */
567 if (epwd)
568 {
569 strcpy (old_pwd, epwd);
570 if (str[len - 1] == '/')
571 str[len - 1] = '\0';
572 setenv ("PWD", str, 1);
573 }
574 st = system (sh);
575 chdir (oldwd); /* FIXME: Do the right thing on chdir failure. */
576 if (epwd)
577 putenv (old_pwd); /* restore previous value */
578 }
579#else /* not MSDOS */
580#ifdef WINDOWSNT
581 /* Waits for process completion */
582 pid = _spawnlp (_P_WAIT, sh, sh, NULL);
583 chdir (oldwd); /* FIXME: Do the right thing on chdir failure. */
584 if (pid == -1)
585 write (1, "Can't execute subshell", 22);
586#else /* not WINDOWSNT */
587 execlp (sh, sh, (char *) 0);
588 ignore_value (write (1, "Can't execute subshell", 22));
589 _exit (1);
590#endif /* not WINDOWSNT */
591#endif /* not MSDOS */
592 }
593
594 /* Do this now if we did not do it before. */
595#ifndef MSDOS
596 save_signal_handlers (saved_handlers);
597 synch_process_alive = 1;
598#endif
599
600#ifndef DOS_NT
601 wait_for_termination (pid);
602#endif
603 restore_signal_handlers (saved_handlers);
604 synch_process_alive = 0;
605}
606
607static void
608save_signal_handlers (struct save_signal *saved_handlers)
609{
610 while (saved_handlers->code)
611 {
612 saved_handlers->handler
613 = (void (*) (int)) signal (saved_handlers->code, SIG_IGN);
614 saved_handlers++;
615 }
616}
617
618static void
619restore_signal_handlers (struct save_signal *saved_handlers)
620{
621 while (saved_handlers->code)
622 {
623 signal (saved_handlers->code, saved_handlers->handler);
624 saved_handlers++;
625 }
626}
627\f
628#ifndef SIGIO
629/* If SIGIO is broken, don't do anything. */
630void
631init_sigio (int fd)
632{
633}
634
635static void
636reset_sigio (int fd)
637{
638}
639
640void
641request_sigio (void)
642{
643}
644
645void
646unrequest_sigio (void)
647{
648}
649
650#else
651#ifdef F_SETFL
652
653int old_fcntl_flags[MAXDESC];
654
655void
656init_sigio (int fd)
657{
658#ifdef FASYNC
659 old_fcntl_flags[fd] = fcntl (fd, F_GETFL, 0) & ~FASYNC;
660 fcntl (fd, F_SETFL, old_fcntl_flags[fd] | FASYNC);
661#endif
662 interrupts_deferred = 0;
663}
664
665static void
666reset_sigio (int fd)
667{
668#ifdef FASYNC
669 fcntl (fd, F_SETFL, old_fcntl_flags[fd]);
670#endif
671}
672
673#ifdef FASYNC /* F_SETFL does not imply existence of FASYNC */
674/* XXX Uhm, FASYNC is not used anymore here. */
675/* XXX Yeah, but you need it for SIGIO, don't you? */
676
677void
678request_sigio (void)
679{
680 if (noninteractive)
681 return;
682
683#ifdef SIGWINCH
684 sigunblock (sigmask (SIGWINCH));
685#endif
686 sigunblock (sigmask (SIGIO));
687
688 interrupts_deferred = 0;
689}
690
691void
692unrequest_sigio (void)
693{
694 if (noninteractive)
695 return;
696
697#if 0 /* XXX What's wrong with blocking SIGIO under X? */
698 if (x_display_list)
699 return;
700#endif
701
702#ifdef SIGWINCH
703 sigblock (sigmask (SIGWINCH));
704#endif
705 sigblock (sigmask (SIGIO));
706 interrupts_deferred = 1;
707}
708
709#else /* no FASYNC */
710#ifndef MSDOS
711
712void
713request_sigio (void)
714{
715 if (noninteractive || read_socket_hook)
716 return;
717
718 croak ("request_sigio");
719}
720
721void
722unrequest_sigio (void)
723{
724 if (noninteractive || read_socket_hook)
725 return;
726
727 croak ("unrequest_sigio");
728}
729
730#endif /* MSDOS */
731#endif /* FASYNC */
732#endif /* F_SETFL */
733#endif /* SIGIO */
734
735\f
736/* Getting and setting emacs_tty structures. */
737
738/* Set *TC to the parameters associated with the terminal FD.
739 Return zero if all's well, or -1 if we ran into an error we
740 couldn't deal with. */
741int
742emacs_get_tty (int fd, struct emacs_tty *settings)
743{
744 /* Retrieve the primary parameters - baud rate, character size, etcetera. */
745#ifndef DOS_NT
746 /* We have those nifty POSIX tcmumbleattr functions. */
747 memset (&settings->main, 0, sizeof (settings->main));
748 if (tcgetattr (fd, &settings->main) < 0)
749 return -1;
750#endif
751
752 /* We have survived the tempest. */
753 return 0;
754}
755
756
757/* Set the parameters of the tty on FD according to the contents of
758 *SETTINGS. If FLUSHP is non-zero, we discard input.
759 Return 0 if all went well, and -1 if anything failed. */
760
761int
762emacs_set_tty (int fd, struct emacs_tty *settings, int flushp)
763{
764 /* Set the primary parameters - baud rate, character size, etcetera. */
765#ifndef DOS_NT
766 int i;
767 /* We have those nifty POSIX tcmumbleattr functions.
768 William J. Smith <wjs@wiis.wang.com> writes:
769 "POSIX 1003.1 defines tcsetattr to return success if it was
770 able to perform any of the requested actions, even if some
771 of the requested actions could not be performed.
772 We must read settings back to ensure tty setup properly.
773 AIX requires this to keep tty from hanging occasionally." */
774 /* This make sure that we don't loop indefinitely in here. */
775 for (i = 0 ; i < 10 ; i++)
776 if (tcsetattr (fd, flushp ? TCSAFLUSH : TCSADRAIN, &settings->main) < 0)
777 {
778 if (errno == EINTR)
779 continue;
780 else
781 return -1;
782 }
783 else
784 {
785 struct termios new;
786
787 memset (&new, 0, sizeof (new));
788 /* Get the current settings, and see if they're what we asked for. */
789 tcgetattr (fd, &new);
790 /* We cannot use memcmp on the whole structure here because under
791 * aix386 the termios structure has some reserved field that may
792 * not be filled in.
793 */
794 if ( new.c_iflag == settings->main.c_iflag
795 && new.c_oflag == settings->main.c_oflag
796 && new.c_cflag == settings->main.c_cflag
797 && new.c_lflag == settings->main.c_lflag
798 && memcmp (new.c_cc, settings->main.c_cc, NCCS) == 0)
799 break;
800 else
801 continue;
802 }
803#endif
804
805 /* We have survived the tempest. */
806 return 0;
807}
808
809\f
810
811#ifdef F_SETOWN
812int old_fcntl_owner[MAXDESC];
813#endif /* F_SETOWN */
814
815/* This may also be defined in stdio,
816 but if so, this does no harm,
817 and using the same name avoids wasting the other one's space. */
818
819#if defined (USG)
820unsigned char _sobuf[BUFSIZ+8];
821#else
822char _sobuf[BUFSIZ];
823#endif
824
825/* Initialize the terminal mode on all tty devices that are currently
826 open. */
827
828void
829init_all_sys_modes (void)
830{
831 struct tty_display_info *tty;
832 for (tty = tty_list; tty; tty = tty->next)
833 init_sys_modes (tty);
834}
835
836/* Initialize the terminal mode on the given tty device. */
837
838void
839init_sys_modes (struct tty_display_info *tty_out)
840{
841 struct emacs_tty tty;
842
843 Vtty_erase_char = Qnil;
844
845 if (noninteractive)
846 return;
847
848 if (!tty_out->output)
849 return; /* The tty is suspended. */
850
851 if (! tty_out->old_tty)
852 tty_out->old_tty = (struct emacs_tty *) xmalloc (sizeof (struct emacs_tty));
853
854 emacs_get_tty (fileno (tty_out->input), tty_out->old_tty);
855
856 tty = *tty_out->old_tty;
857
858#if !defined (DOS_NT)
859 XSETINT (Vtty_erase_char, tty.main.c_cc[VERASE]);
860
861 tty.main.c_iflag |= (IGNBRK); /* Ignore break condition */
862 tty.main.c_iflag &= ~ICRNL; /* Disable map of CR to NL on input */
863#ifdef INLCR /* I'm just being cautious,
864 since I can't check how widespread INLCR is--rms. */
865 tty.main.c_iflag &= ~INLCR; /* Disable map of NL to CR on input */
866#endif
867#ifdef ISTRIP
868 tty.main.c_iflag &= ~ISTRIP; /* don't strip 8th bit on input */
869#endif
870 tty.main.c_lflag &= ~ECHO; /* Disable echo */
871 tty.main.c_lflag &= ~ICANON; /* Disable erase/kill processing */
872#ifdef IEXTEN
873 tty.main.c_lflag &= ~IEXTEN; /* Disable other editing characters. */
874#endif
875 tty.main.c_lflag |= ISIG; /* Enable signals */
876 if (tty_out->flow_control)
877 {
878 tty.main.c_iflag |= IXON; /* Enable start/stop output control */
879#ifdef IXANY
880 tty.main.c_iflag &= ~IXANY;
881#endif /* IXANY */
882 }
883 else
884 tty.main.c_iflag &= ~IXON; /* Disable start/stop output control */
885 tty.main.c_oflag &= ~ONLCR; /* Disable map of NL to CR-NL
886 on output */
887 tty.main.c_oflag &= ~TAB3; /* Disable tab expansion */
888#ifdef CS8
889 if (tty_out->meta_key)
890 {
891 tty.main.c_cflag |= CS8; /* allow 8th bit on input */
892 tty.main.c_cflag &= ~PARENB;/* Don't check parity */
893 }
894#endif
895 if (tty_out->input == stdin)
896 {
897 tty.main.c_cc[VINTR] = quit_char; /* C-g (usually) gives SIGINT */
898 /* Set up C-g for both SIGQUIT and SIGINT.
899 We don't know which we will get, but we handle both alike
900 so which one it really gives us does not matter. */
901 tty.main.c_cc[VQUIT] = quit_char;
902 }
903 else
904 {
905 /* We normally don't get interrupt or quit signals from tty
906 devices other than our controlling terminal; therefore,
907 we must handle C-g as normal input. Unfortunately, this
908 means that the interrupt and quit feature must be
909 disabled on secondary ttys, or we would not even see the
910 keypress.
911
912 Note that even though emacsclient could have special code
913 to pass SIGINT to Emacs, we should _not_ enable
914 interrupt/quit keys for emacsclient frames. This means
915 that we can't break out of loops in C code from a
916 secondary tty frame, but we can always decide what
917 display the C-g came from, which is more important from a
918 usability point of view. (Consider the case when two
919 people work together using the same Emacs instance.) */
920 tty.main.c_cc[VINTR] = CDISABLE;
921 tty.main.c_cc[VQUIT] = CDISABLE;
922 }
923 tty.main.c_cc[VMIN] = 1; /* Input should wait for at least 1 char */
924 tty.main.c_cc[VTIME] = 0; /* no matter how long that takes. */
925#ifdef VSWTCH
926 tty.main.c_cc[VSWTCH] = CDISABLE; /* Turn off shell layering use
927 of C-z */
928#endif /* VSWTCH */
929
930#ifdef VSUSP
931 tty.main.c_cc[VSUSP] = CDISABLE; /* Turn off handling of C-z. */
932#endif /* VSUSP */
933#ifdef V_DSUSP
934 tty.main.c_cc[V_DSUSP] = CDISABLE; /* Turn off handling of C-y. */
935#endif /* V_DSUSP */
936#ifdef VDSUSP /* Some systems have VDSUSP, some have V_DSUSP. */
937 tty.main.c_cc[VDSUSP] = CDISABLE;
938#endif /* VDSUSP */
939#ifdef VLNEXT
940 tty.main.c_cc[VLNEXT] = CDISABLE;
941#endif /* VLNEXT */
942#ifdef VREPRINT
943 tty.main.c_cc[VREPRINT] = CDISABLE;
944#endif /* VREPRINT */
945#ifdef VWERASE
946 tty.main.c_cc[VWERASE] = CDISABLE;
947#endif /* VWERASE */
948#ifdef VDISCARD
949 tty.main.c_cc[VDISCARD] = CDISABLE;
950#endif /* VDISCARD */
951
952 if (tty_out->flow_control)
953 {
954#ifdef VSTART
955 tty.main.c_cc[VSTART] = '\021';
956#endif /* VSTART */
957#ifdef VSTOP
958 tty.main.c_cc[VSTOP] = '\023';
959#endif /* VSTOP */
960 }
961 else
962 {
963#ifdef VSTART
964 tty.main.c_cc[VSTART] = CDISABLE;
965#endif /* VSTART */
966#ifdef VSTOP
967 tty.main.c_cc[VSTOP] = CDISABLE;
968#endif /* VSTOP */
969 }
970
971#ifdef AIX
972 tty.main.c_cc[VSTRT] = CDISABLE;
973 tty.main.c_cc[VSTOP] = CDISABLE;
974 tty.main.c_cc[VSUSP] = CDISABLE;
975 tty.main.c_cc[VDSUSP] = CDISABLE;
976 if (tty_out->flow_control)
977 {
978#ifdef VSTART
979 tty.main.c_cc[VSTART] = '\021';
980#endif /* VSTART */
981#ifdef VSTOP
982 tty.main.c_cc[VSTOP] = '\023';
983#endif /* VSTOP */
984 }
985 /* Also, PTY overloads NUL and BREAK.
986 don't ignore break, but don't signal either, so it looks like NUL.
987 This really serves a purpose only if running in an XTERM window
988 or via TELNET or the like, but does no harm elsewhere. */
989 tty.main.c_iflag &= ~IGNBRK;
990 tty.main.c_iflag &= ~BRKINT;
991#endif
992#endif /* not DOS_NT */
993
994#ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida, MW Aug 1993 */
995 if (!tty_out->term_initted)
996 internal_terminal_init ();
997 dos_ttraw (tty_out);
998#endif
999
1000 emacs_set_tty (fileno (tty_out->input), &tty, 0);
1001
1002 /* This code added to insure that, if flow-control is not to be used,
1003 we have an unlocked terminal at the start. */
1004
1005#ifdef TCXONC
1006 if (!tty_out->flow_control) ioctl (fileno (tty_out->input), TCXONC, 1);
1007#endif
1008#ifdef TIOCSTART
1009 if (!tty_out->flow_control) ioctl (fileno (tty_out->input), TIOCSTART, 0);
1010#endif
1011
1012#if !defined (DOS_NT)
1013#ifdef TCOON
1014 if (!tty_out->flow_control) tcflow (fileno (tty_out->input), TCOON);
1015#endif
1016#endif
1017
1018#ifdef F_SETFL
1019#ifdef F_GETOWN /* F_SETFL does not imply existence of F_GETOWN */
1020 if (interrupt_input)
1021 {
1022 old_fcntl_owner[fileno (tty_out->input)] =
1023 fcntl (fileno (tty_out->input), F_GETOWN, 0);
1024 fcntl (fileno (tty_out->input), F_SETOWN, getpid ());
1025 init_sigio (fileno (tty_out->input));
1026#ifdef HAVE_GPM
1027 if (gpm_tty == tty_out)
1028 {
1029 /* Arrange for mouse events to give us SIGIO signals. */
1030 fcntl (gpm_fd, F_SETOWN, getpid ());
1031 fcntl (gpm_fd, F_SETFL, fcntl (gpm_fd, F_GETFL, 0) | O_NONBLOCK);
1032 init_sigio (gpm_fd);
1033 }
1034#endif /* HAVE_GPM */
1035 }
1036#endif /* F_GETOWN */
1037#endif /* F_SETFL */
1038
1039#ifdef _IOFBF
1040 /* This symbol is defined on recent USG systems.
1041 Someone says without this call USG won't really buffer the file
1042 even with a call to setbuf. */
1043 setvbuf (tty_out->output, (char *) _sobuf, _IOFBF, sizeof _sobuf);
1044#else
1045 setbuf (tty_out->output, (char *) _sobuf);
1046#endif
1047
1048 if (tty_out->terminal->set_terminal_modes_hook)
1049 tty_out->terminal->set_terminal_modes_hook (tty_out->terminal);
1050
1051 if (!tty_out->term_initted)
1052 {
1053 Lisp_Object tail, frame;
1054 FOR_EACH_FRAME (tail, frame)
1055 {
1056 /* XXX This needs to be revised. */
1057 if (FRAME_TERMCAP_P (XFRAME (frame))
1058 && FRAME_TTY (XFRAME (frame)) == tty_out)
1059 init_frame_faces (XFRAME (frame));
1060 }
1061 }
1062
1063 if (tty_out->term_initted && no_redraw_on_reenter)
1064 {
1065 /* We used to call "direct_output_forward_char(0)" here,
1066 but it's not clear why, since it may not do anything anyway. */
1067 }
1068 else
1069 {
1070 Lisp_Object tail, frame;
1071 frame_garbaged = 1;
1072 FOR_EACH_FRAME (tail, frame)
1073 {
1074 if ((FRAME_TERMCAP_P (XFRAME (frame))
1075 || FRAME_MSDOS_P (XFRAME (frame)))
1076 && FRAME_TTY (XFRAME (frame)) == tty_out)
1077 FRAME_GARBAGED_P (XFRAME (frame)) = 1;
1078 }
1079 }
1080
1081 tty_out->term_initted = 1;
1082}
1083
1084/* Return nonzero if safe to use tabs in output.
1085 At the time this is called, init_sys_modes has not been done yet. */
1086
1087int
1088tabs_safe_p (int fd)
1089{
1090 struct emacs_tty etty;
1091
1092 emacs_get_tty (fd, &etty);
1093#ifndef DOS_NT
1094#ifdef TABDLY
1095 return ((etty.main.c_oflag & TABDLY) != TAB3);
1096#else /* not TABDLY */
1097 return 1;
1098#endif /* not TABDLY */
1099#else /* DOS_NT */
1100 return 0;
1101#endif /* DOS_NT */
1102}
1103\f
1104/* Get terminal size from system.
1105 Store number of lines into *HEIGHTP and width into *WIDTHP.
1106 We store 0 if there's no valid information. */
1107
1108void
1109get_tty_size (int fd, int *widthp, int *heightp)
1110{
1111
1112#ifdef TIOCGWINSZ
1113
1114 /* BSD-style. */
1115 struct winsize size;
1116
1117 if (ioctl (fd, TIOCGWINSZ, &size) == -1)
1118 *widthp = *heightp = 0;
1119 else
1120 {
1121 *widthp = size.ws_col;
1122 *heightp = size.ws_row;
1123 }
1124
1125#else
1126#ifdef TIOCGSIZE
1127
1128 /* SunOS - style. */
1129 struct ttysize size;
1130
1131 if (ioctl (fd, TIOCGSIZE, &size) == -1)
1132 *widthp = *heightp = 0;
1133 else
1134 {
1135 *widthp = size.ts_cols;
1136 *heightp = size.ts_lines;
1137 }
1138
1139#else
1140#ifdef MSDOS
1141 *widthp = ScreenCols ();
1142 *heightp = ScreenRows ();
1143#else /* system doesn't know size */
1144 *widthp = 0;
1145 *heightp = 0;
1146#endif
1147#endif /* not SunOS-style */
1148#endif /* not BSD-style */
1149}
1150
1151/* Set the logical window size associated with descriptor FD
1152 to HEIGHT and WIDTH. This is used mainly with ptys. */
1153
1154int
1155set_window_size (int fd, int height, int width)
1156{
1157#ifdef TIOCSWINSZ
1158
1159 /* BSD-style. */
1160 struct winsize size;
1161 size.ws_row = height;
1162 size.ws_col = width;
1163
1164 if (ioctl (fd, TIOCSWINSZ, &size) == -1)
1165 return 0; /* error */
1166 else
1167 return 1;
1168
1169#else
1170#ifdef TIOCSSIZE
1171
1172 /* SunOS - style. */
1173 struct ttysize size;
1174 size.ts_lines = height;
1175 size.ts_cols = width;
1176
1177 if (ioctl (fd, TIOCGSIZE, &size) == -1)
1178 return 0;
1179 else
1180 return 1;
1181#else
1182 return -1;
1183#endif /* not SunOS-style */
1184#endif /* not BSD-style */
1185}
1186
1187\f
1188
1189/* Prepare all terminal devices for exiting Emacs. */
1190
1191void
1192reset_all_sys_modes (void)
1193{
1194 struct tty_display_info *tty;
1195 for (tty = tty_list; tty; tty = tty->next)
1196 reset_sys_modes (tty);
1197}
1198
1199/* Prepare the terminal for closing it; move the cursor to the
1200 bottom of the frame, turn off interrupt-driven I/O, etc. */
1201
1202void
1203reset_sys_modes (struct tty_display_info *tty_out)
1204{
1205 if (noninteractive)
1206 {
1207 fflush (stdout);
1208 return;
1209 }
1210 if (!tty_out->term_initted)
1211 return;
1212
1213 if (!tty_out->output)
1214 return; /* The tty is suspended. */
1215
1216 /* Go to and clear the last line of the terminal. */
1217
1218 cmgoto (tty_out, FrameRows (tty_out) - 1, 0);
1219
1220 /* Code adapted from tty_clear_end_of_line. */
1221 if (tty_out->TS_clr_line)
1222 {
1223 emacs_tputs (tty_out, tty_out->TS_clr_line, 1, cmputc);
1224 }
1225 else
1226 { /* have to do it the hard way */
1227 int i;
1228 tty_turn_off_insert (tty_out);
1229
1230 for (i = curX (tty_out); i < FrameCols (tty_out) - 1; i++)
1231 {
1232 fputc (' ', tty_out->output);
1233 }
1234 }
1235
1236 cmgoto (tty_out, FrameRows (tty_out) - 1, 0);
1237 fflush (tty_out->output);
1238
1239 if (tty_out->terminal->reset_terminal_modes_hook)
1240 tty_out->terminal->reset_terminal_modes_hook (tty_out->terminal);
1241
1242#ifdef BSD_SYSTEM
1243 /* Avoid possible loss of output when changing terminal modes. */
1244 fsync (fileno (tty_out->output));
1245#endif
1246
1247#ifdef F_SETFL
1248#ifdef F_SETOWN /* F_SETFL does not imply existence of F_SETOWN */
1249 if (interrupt_input)
1250 {
1251 reset_sigio (fileno (tty_out->input));
1252 fcntl (fileno (tty_out->input), F_SETOWN,
1253 old_fcntl_owner[fileno (tty_out->input)]);
1254 }
1255#endif /* F_SETOWN */
1256#ifdef O_NDELAY
1257 fcntl (fileno (tty_out->input), F_SETFL,
1258 fcntl (fileno (tty_out->input), F_GETFL, 0) & ~O_NDELAY);
1259#endif
1260#endif /* F_SETFL */
1261
1262 if (tty_out->old_tty)
1263 while (emacs_set_tty (fileno (tty_out->input),
1264 tty_out->old_tty, 0) < 0 && errno == EINTR)
1265 ;
1266
1267#ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */
1268 dos_ttcooked ();
1269#endif
1270
1271}
1272\f
1273#ifdef HAVE_PTYS
1274
1275/* Set up the proper status flags for use of a pty. */
1276
1277void
1278setup_pty (int fd)
1279{
1280 /* I'm told that TOICREMOTE does not mean control chars
1281 "can't be sent" but rather that they don't have
1282 input-editing or signaling effects.
1283 That should be good, because we have other ways
1284 to do those things in Emacs.
1285 However, telnet mode seems not to work on 4.2.
1286 So TIOCREMOTE is turned off now. */
1287
1288 /* Under hp-ux, if TIOCREMOTE is turned on, some calls
1289 will hang. In particular, the "timeout" feature (which
1290 causes a read to return if there is no data available)
1291 does this. Also it is known that telnet mode will hang
1292 in such a way that Emacs must be stopped (perhaps this
1293 is the same problem).
1294
1295 If TIOCREMOTE is turned off, then there is a bug in
1296 hp-ux which sometimes loses data. Apparently the
1297 code which blocks the master process when the internal
1298 buffer fills up does not work. Other than this,
1299 though, everything else seems to work fine.
1300
1301 Since the latter lossage is more benign, we may as well
1302 lose that way. -- cph */
1303#ifdef FIONBIO
1304#if defined(UNIX98_PTYS)
1305 {
1306 int on = 1;
1307 ioctl (fd, FIONBIO, &on);
1308 }
1309#endif
1310#endif
1311}
1312#endif /* HAVE_PTYS */
1313\f
1314#ifdef HAVE_SOCKETS
1315#include <sys/socket.h>
1316#include <netdb.h>
1317#endif /* HAVE_SOCKETS */
1318
1319#ifdef TRY_AGAIN
1320#ifndef HAVE_H_ERRNO
1321extern int h_errno;
1322#endif
1323#endif /* TRY_AGAIN */
1324
1325void
1326init_system_name (void)
1327{
1328#ifndef HAVE_GETHOSTNAME
1329 struct utsname uts;
1330 uname (&uts);
1331 Vsystem_name = build_string (uts.nodename);
1332#else /* HAVE_GETHOSTNAME */
1333 unsigned int hostname_size = 256;
1334 char *hostname = (char *) alloca (hostname_size);
1335
1336 /* Try to get the host name; if the buffer is too short, try
1337 again. Apparently, the only indication gethostname gives of
1338 whether the buffer was large enough is the presence or absence
1339 of a '\0' in the string. Eech. */
1340 for (;;)
1341 {
1342 gethostname (hostname, hostname_size - 1);
1343 hostname[hostname_size - 1] = '\0';
1344
1345 /* Was the buffer large enough for the '\0'? */
1346 if (strlen (hostname) < hostname_size - 1)
1347 break;
1348
1349 hostname_size <<= 1;
1350 hostname = (char *) alloca (hostname_size);
1351 }
1352#ifdef HAVE_SOCKETS
1353 /* Turn the hostname into the official, fully-qualified hostname.
1354 Don't do this if we're going to dump; this can confuse system
1355 libraries on some machines and make the dumped emacs core dump. */
1356#ifndef CANNOT_DUMP
1357 if (initialized)
1358#endif /* not CANNOT_DUMP */
1359 if (! strchr (hostname, '.'))
1360 {
1361 int count;
1362#ifdef HAVE_GETADDRINFO
1363 struct addrinfo *res;
1364 struct addrinfo hints;
1365 int ret;
1366
1367 memset (&hints, 0, sizeof (hints));
1368 hints.ai_socktype = SOCK_STREAM;
1369 hints.ai_flags = AI_CANONNAME;
1370
1371 for (count = 0;; count++)
1372 {
1373 if ((ret = getaddrinfo (hostname, NULL, &hints, &res)) == 0
1374 || ret != EAI_AGAIN)
1375 break;
1376
1377 if (count >= 5)
1378 break;
1379 Fsleep_for (make_number (1), Qnil);
1380 }
1381
1382 if (ret == 0)
1383 {
1384 struct addrinfo *it = res;
1385 while (it)
1386 {
1387 char *fqdn = it->ai_canonname;
1388 if (fqdn && strchr (fqdn, '.')
1389 && strcmp (fqdn, "localhost.localdomain") != 0)
1390 break;
1391 it = it->ai_next;
1392 }
1393 if (it)
1394 {
1395 hostname = alloca (strlen (it->ai_canonname) + 1);
1396 strcpy (hostname, it->ai_canonname);
1397 }
1398 freeaddrinfo (res);
1399 }
1400#else /* !HAVE_GETADDRINFO */
1401 struct hostent *hp;
1402 for (count = 0;; count++)
1403 {
1404
1405#ifdef TRY_AGAIN
1406 h_errno = 0;
1407#endif
1408 hp = gethostbyname (hostname);
1409#ifdef TRY_AGAIN
1410 if (! (hp == 0 && h_errno == TRY_AGAIN))
1411#endif
1412
1413 break;
1414
1415 if (count >= 5)
1416 break;
1417 Fsleep_for (make_number (1), Qnil);
1418 }
1419
1420 if (hp)
1421 {
1422 char *fqdn = (char *) hp->h_name;
1423
1424 if (!strchr (fqdn, '.'))
1425 {
1426 /* We still don't have a fully qualified domain name.
1427 Try to find one in the list of alternate names */
1428 char **alias = hp->h_aliases;
1429 while (*alias
1430 && (!strchr (*alias, '.')
1431 || !strcmp (*alias, "localhost.localdomain")))
1432 alias++;
1433 if (*alias)
1434 fqdn = *alias;
1435 }
1436 hostname = fqdn;
1437 }
1438#endif /* !HAVE_GETADDRINFO */
1439 }
1440#endif /* HAVE_SOCKETS */
1441 Vsystem_name = build_string (hostname);
1442#endif /* HAVE_GETHOSTNAME */
1443 {
1444 unsigned char *p;
1445 for (p = SDATA (Vsystem_name); *p; p++)
1446 if (*p == ' ' || *p == '\t')
1447 *p = '-';
1448 }
1449}
1450\f
1451/* POSIX signals support - DJB */
1452/* Anyone with POSIX signals should have ANSI C declarations */
1453
1454sigset_t empty_mask, full_mask;
1455
1456#ifndef WINDOWSNT
1457
1458signal_handler_t
1459sys_signal (int signal_number, signal_handler_t action)
1460{
1461 struct sigaction new_action, old_action;
1462 sigemptyset (&new_action.sa_mask);
1463 new_action.sa_handler = action;
1464 new_action.sa_flags = 0;
1465#if defined (SA_RESTART)
1466 /* Emacs mostly works better with restartable system services. If this
1467 flag exists, we probably want to turn it on here.
1468 However, on some systems this resets the timeout of `select'
1469 which means that `select' never finishes if it keeps getting signals.
1470 BROKEN_SA_RESTART is defined on those systems. */
1471 /* It's not clear why the comment above says "mostly works better". --Stef
1472 When SYNC_INPUT is set, we don't want SA_RESTART because we need to poll
1473 for pending input so we need long-running syscalls to be interrupted
1474 after a signal that sets the interrupt_input_pending flag. */
1475 /* Non-interactive keyboard input goes through stdio, where we always
1476 want restartable system calls. */
1477# if defined (BROKEN_SA_RESTART) || defined(SYNC_INPUT)
1478 if (noninteractive)
1479# endif
1480 new_action.sa_flags = SA_RESTART;
1481#endif
1482 sigaction (signal_number, &new_action, &old_action);
1483 return (old_action.sa_handler);
1484}
1485
1486#endif /* WINDOWSNT */
1487
1488#ifndef __GNUC__
1489/* If we're compiling with GCC, we don't need this function, since it
1490 can be written as a macro. */
1491sigset_t
1492sys_sigmask (int sig)
1493{
1494 sigset_t mask;
1495 sigemptyset (&mask);
1496 sigaddset (&mask, sig);
1497 return mask;
1498}
1499#endif
1500
1501/* I'd like to have these guys return pointers to the mask storage in here,
1502 but there'd be trouble if the code was saving multiple masks. I'll be
1503 safe and pass the structure. It normally won't be more than 2 bytes
1504 anyhow. - DJB */
1505
1506sigset_t
1507sys_sigblock (sigset_t new_mask)
1508{
1509 sigset_t old_mask;
1510 sigprocmask (SIG_BLOCK, &new_mask, &old_mask);
1511 return (old_mask);
1512}
1513
1514sigset_t
1515sys_sigunblock (sigset_t new_mask)
1516{
1517 sigset_t old_mask;
1518 sigprocmask (SIG_UNBLOCK, &new_mask, &old_mask);
1519 return (old_mask);
1520}
1521
1522sigset_t
1523sys_sigsetmask (sigset_t new_mask)
1524{
1525 sigset_t old_mask;
1526 sigprocmask (SIG_SETMASK, &new_mask, &old_mask);
1527 return (old_mask);
1528}
1529
1530\f
1531#if !defined HAVE_STRSIGNAL && !HAVE_DECL_SYS_SIGLIST
1532static char *my_sys_siglist[NSIG];
1533# ifdef sys_siglist
1534# undef sys_siglist
1535# endif
1536# define sys_siglist my_sys_siglist
1537#endif
1538
1539void
1540init_signals (void)
1541{
1542 sigemptyset (&empty_mask);
1543 sigfillset (&full_mask);
1544
1545#if !defined HAVE_STRSIGNAL && !HAVE_DECL_SYS_SIGLIST
1546 if (! initialized)
1547 {
1548# ifdef SIGABRT
1549 sys_siglist[SIGABRT] = "Aborted";
1550# endif
1551# ifdef SIGAIO
1552 sys_siglist[SIGAIO] = "LAN I/O interrupt";
1553# endif
1554# ifdef SIGALRM
1555 sys_siglist[SIGALRM] = "Alarm clock";
1556# endif
1557# ifdef SIGBUS
1558 sys_siglist[SIGBUS] = "Bus error";
1559# endif
1560# ifdef SIGCLD
1561 sys_siglist[SIGCLD] = "Child status changed";
1562# endif
1563# ifdef SIGCHLD
1564 sys_siglist[SIGCHLD] = "Child status changed";
1565# endif
1566# ifdef SIGCONT
1567 sys_siglist[SIGCONT] = "Continued";
1568# endif
1569# ifdef SIGDANGER
1570 sys_siglist[SIGDANGER] = "Swap space dangerously low";
1571# endif
1572# ifdef SIGDGNOTIFY
1573 sys_siglist[SIGDGNOTIFY] = "Notification message in queue";
1574# endif
1575# ifdef SIGEMT
1576 sys_siglist[SIGEMT] = "Emulation trap";
1577# endif
1578# ifdef SIGFPE
1579 sys_siglist[SIGFPE] = "Arithmetic exception";
1580# endif
1581# ifdef SIGFREEZE
1582 sys_siglist[SIGFREEZE] = "SIGFREEZE";
1583# endif
1584# ifdef SIGGRANT
1585 sys_siglist[SIGGRANT] = "Monitor mode granted";
1586# endif
1587# ifdef SIGHUP
1588 sys_siglist[SIGHUP] = "Hangup";
1589# endif
1590# ifdef SIGILL
1591 sys_siglist[SIGILL] = "Illegal instruction";
1592# endif
1593# ifdef SIGINT
1594 sys_siglist[SIGINT] = "Interrupt";
1595# endif
1596# ifdef SIGIO
1597 sys_siglist[SIGIO] = "I/O possible";
1598# endif
1599# ifdef SIGIOINT
1600 sys_siglist[SIGIOINT] = "I/O intervention required";
1601# endif
1602# ifdef SIGIOT
1603 sys_siglist[SIGIOT] = "IOT trap";
1604# endif
1605# ifdef SIGKILL
1606 sys_siglist[SIGKILL] = "Killed";
1607# endif
1608# ifdef SIGLOST
1609 sys_siglist[SIGLOST] = "Resource lost";
1610# endif
1611# ifdef SIGLWP
1612 sys_siglist[SIGLWP] = "SIGLWP";
1613# endif
1614# ifdef SIGMSG
1615 sys_siglist[SIGMSG] = "Monitor mode data available";
1616# endif
1617# ifdef SIGPHONE
1618 sys_siglist[SIGWIND] = "SIGPHONE";
1619# endif
1620# ifdef SIGPIPE
1621 sys_siglist[SIGPIPE] = "Broken pipe";
1622# endif
1623# ifdef SIGPOLL
1624 sys_siglist[SIGPOLL] = "Pollable event occurred";
1625# endif
1626# ifdef SIGPROF
1627 sys_siglist[SIGPROF] = "Profiling timer expired";
1628# endif
1629# ifdef SIGPTY
1630 sys_siglist[SIGPTY] = "PTY I/O interrupt";
1631# endif
1632# ifdef SIGPWR
1633 sys_siglist[SIGPWR] = "Power-fail restart";
1634# endif
1635# ifdef SIGQUIT
1636 sys_siglist[SIGQUIT] = "Quit";
1637# endif
1638# ifdef SIGRETRACT
1639 sys_siglist[SIGRETRACT] = "Need to relinguish monitor mode";
1640# endif
1641# ifdef SIGSAK
1642 sys_siglist[SIGSAK] = "Secure attention";
1643# endif
1644# ifdef SIGSEGV
1645 sys_siglist[SIGSEGV] = "Segmentation violation";
1646# endif
1647# ifdef SIGSOUND
1648 sys_siglist[SIGSOUND] = "Sound completed";
1649# endif
1650# ifdef SIGSTOP
1651 sys_siglist[SIGSTOP] = "Stopped (signal)";
1652# endif
1653# ifdef SIGSTP
1654 sys_siglist[SIGSTP] = "Stopped (user)";
1655# endif
1656# ifdef SIGSYS
1657 sys_siglist[SIGSYS] = "Bad argument to system call";
1658# endif
1659# ifdef SIGTERM
1660 sys_siglist[SIGTERM] = "Terminated";
1661# endif
1662# ifdef SIGTHAW
1663 sys_siglist[SIGTHAW] = "SIGTHAW";
1664# endif
1665# ifdef SIGTRAP
1666 sys_siglist[SIGTRAP] = "Trace/breakpoint trap";
1667# endif
1668# ifdef SIGTSTP
1669 sys_siglist[SIGTSTP] = "Stopped (user)";
1670# endif
1671# ifdef SIGTTIN
1672 sys_siglist[SIGTTIN] = "Stopped (tty input)";
1673# endif
1674# ifdef SIGTTOU
1675 sys_siglist[SIGTTOU] = "Stopped (tty output)";
1676# endif
1677# ifdef SIGURG
1678 sys_siglist[SIGURG] = "Urgent I/O condition";
1679# endif
1680# ifdef SIGUSR1
1681 sys_siglist[SIGUSR1] = "User defined signal 1";
1682# endif
1683# ifdef SIGUSR2
1684 sys_siglist[SIGUSR2] = "User defined signal 2";
1685# endif
1686# ifdef SIGVTALRM
1687 sys_siglist[SIGVTALRM] = "Virtual timer expired";
1688# endif
1689# ifdef SIGWAITING
1690 sys_siglist[SIGWAITING] = "Process's LWPs are blocked";
1691# endif
1692# ifdef SIGWINCH
1693 sys_siglist[SIGWINCH] = "Window size changed";
1694# endif
1695# ifdef SIGWIND
1696 sys_siglist[SIGWIND] = "SIGWIND";
1697# endif
1698# ifdef SIGXCPU
1699 sys_siglist[SIGXCPU] = "CPU time limit exceeded";
1700# endif
1701# ifdef SIGXFSZ
1702 sys_siglist[SIGXFSZ] = "File size limit exceeded";
1703# endif
1704 }
1705#endif /* !defined HAVE_STRSIGNAL && !defined HAVE_DECL_SYS_SIGLIST */
1706}
1707\f
1708#ifndef HAVE_RANDOM
1709#ifdef random
1710#define HAVE_RANDOM
1711#endif
1712#endif
1713
1714/* Figure out how many bits the system's random number generator uses.
1715 `random' and `lrand48' are assumed to return 31 usable bits.
1716 BSD `rand' returns a 31 bit value but the low order bits are unusable;
1717 so we'll shift it and treat it like the 15-bit USG `rand'. */
1718
1719#ifndef RAND_BITS
1720# ifdef HAVE_RANDOM
1721# define RAND_BITS 31
1722# else /* !HAVE_RANDOM */
1723# ifdef HAVE_LRAND48
1724# define RAND_BITS 31
1725# define random lrand48
1726# else /* !HAVE_LRAND48 */
1727# define RAND_BITS 15
1728# if RAND_MAX == 32767
1729# define random rand
1730# else /* RAND_MAX != 32767 */
1731# if RAND_MAX == 2147483647
1732# define random() (rand () >> 16)
1733# else /* RAND_MAX != 2147483647 */
1734# ifdef USG
1735# define random rand
1736# else
1737# define random() (rand () >> 16)
1738# endif /* !USG */
1739# endif /* RAND_MAX != 2147483647 */
1740# endif /* RAND_MAX != 32767 */
1741# endif /* !HAVE_LRAND48 */
1742# endif /* !HAVE_RANDOM */
1743#endif /* !RAND_BITS */
1744
1745void
1746seed_random (long int arg)
1747{
1748#ifdef HAVE_RANDOM
1749 srandom ((unsigned int)arg);
1750#else
1751# ifdef HAVE_LRAND48
1752 srand48 (arg);
1753# else
1754 srand ((unsigned int)arg);
1755# endif
1756#endif
1757}
1758
1759/*
1760 * Build a full Emacs-sized word out of whatever we've got.
1761 * This suffices even for a 64-bit architecture with a 15-bit rand.
1762 */
1763long
1764get_random (void)
1765{
1766 long val = random ();
1767#if VALBITS > RAND_BITS
1768 val = (val << RAND_BITS) ^ random ();
1769#if VALBITS > 2*RAND_BITS
1770 val = (val << RAND_BITS) ^ random ();
1771#if VALBITS > 3*RAND_BITS
1772 val = (val << RAND_BITS) ^ random ();
1773#if VALBITS > 4*RAND_BITS
1774 val = (val << RAND_BITS) ^ random ();
1775#endif /* need at least 5 */
1776#endif /* need at least 4 */
1777#endif /* need at least 3 */
1778#endif /* need at least 2 */
1779 return val & ((1L << VALBITS) - 1);
1780}
1781
1782#ifndef HAVE_STRERROR
1783#ifndef WINDOWSNT
1784char *
1785strerror (errnum)
1786 int errnum;
1787{
1788 extern char *sys_errlist[];
1789 extern int sys_nerr;
1790
1791 if (errnum >= 0 && errnum < sys_nerr)
1792 return sys_errlist[errnum];
1793 return (char *) "Unknown error";
1794}
1795#endif /* not WINDOWSNT */
1796#endif /* ! HAVE_STRERROR */
1797\f
1798int
1799emacs_open (const char *path, int oflag, int mode)
1800{
1801 register int rtnval;
1802
1803 while ((rtnval = open (path, oflag, mode)) == -1
1804 && (errno == EINTR))
1805 QUIT;
1806 return (rtnval);
1807}
1808
1809int
1810emacs_close (int fd)
1811{
1812 int did_retry = 0;
1813 register int rtnval;
1814
1815 while ((rtnval = close (fd)) == -1
1816 && (errno == EINTR))
1817 did_retry = 1;
1818
1819 /* If close is interrupted SunOS 4.1 may or may not have closed the
1820 file descriptor. If it did the second close will fail with
1821 errno = EBADF. That means we have succeeded. */
1822 if (rtnval == -1 && did_retry && errno == EBADF)
1823 return 0;
1824
1825 return rtnval;
1826}
1827
1828ssize_t
1829emacs_read (int fildes, char *buf, size_t nbyte)
1830{
1831 register ssize_t rtnval;
1832
1833 /* Defend against the possibility that a buggy caller passes a negative NBYTE
1834 argument, which would be converted to a large unsigned size_t NBYTE. This
1835 defense prevents callers from doing large writes, unfortunately. This
1836 size restriction can be removed once we have carefully checked that there
1837 are no such callers. */
1838 if ((ssize_t) nbyte < 0)
1839 abort ();
1840
1841 while ((rtnval = read (fildes, buf, nbyte)) == -1
1842 && (errno == EINTR))
1843 QUIT;
1844 return (rtnval);
1845}
1846
1847ssize_t
1848emacs_write (int fildes, const char *buf, size_t nbyte)
1849{
1850 register ssize_t rtnval, bytes_written;
1851
1852 /* Defend against negative NBYTE, as in emacs_read. */
1853 if ((ssize_t) nbyte < 0)
1854 abort ();
1855
1856 bytes_written = 0;
1857
1858 while (nbyte != 0)
1859 {
1860 rtnval = write (fildes, buf, nbyte);
1861
1862 if (rtnval == -1)
1863 {
1864 if (errno == EINTR)
1865 {
1866#ifdef SYNC_INPUT
1867 /* I originally used `QUIT' but that might causes files to
1868 be truncated if you hit C-g in the middle of it. --Stef */
1869 process_pending_signals ();
1870#endif
1871 continue;
1872 }
1873 else
1874 return (bytes_written ? bytes_written : -1);
1875 }
1876
1877 buf += rtnval;
1878 nbyte -= rtnval;
1879 bytes_written += rtnval;
1880 }
1881 return (bytes_written);
1882}
1883
1884static struct allocator const emacs_norealloc_allocator =
1885 { xmalloc, NULL, xfree, memory_full };
1886
1887/* Get the symbolic link value of FILENAME. Return a pointer to a
1888 NUL-terminated string. If readlink fails, return NULL and set
1889 errno. If the value fits in INITIAL_BUF, return INITIAL_BUF.
1890 Otherwise, allocate memory and return a pointer to that memory. If
1891 memory allocation fails, diagnose and fail without returning. If
1892 successful, store the length of the symbolic link into *LINKLEN. */
1893char *
1894emacs_readlink (char const *filename, char initial_buf[READLINK_BUFSIZE])
1895{
1896 return careadlinkat (AT_FDCWD, filename, initial_buf, READLINK_BUFSIZE,
1897 &emacs_norealloc_allocator, careadlinkatcwd);
1898}
1899\f
1900#ifdef USG
1901/*
1902 * All of the following are for USG.
1903 *
1904 * On USG systems the system calls are INTERRUPTIBLE by signals
1905 * that the user program has elected to catch. Thus the system call
1906 * must be retried in these cases. To handle this without massive
1907 * changes in the source code, we remap the standard system call names
1908 * to names for our own functions in sysdep.c that do the system call
1909 * with retries. Actually, for portability reasons, it is good
1910 * programming practice, as this example shows, to limit all actual
1911 * system calls to a single occurrence in the source. Sure, this
1912 * adds an extra level of function call overhead but it is almost
1913 * always negligible. Fred Fish, Unisoft Systems Inc.
1914 */
1915
1916/*
1917 * Warning, this function may not duplicate 4.2 action properly
1918 * under error conditions.
1919 */
1920
1921#ifndef HAVE_GETWD
1922
1923#ifndef MAXPATHLEN
1924/* In 4.1, param.h fails to define this. */
1925#define MAXPATHLEN 1024
1926#endif
1927
1928char *
1929getwd (char *pathname)
1930{
1931 char *npath, *spath;
1932 extern char *getcwd (char *, size_t);
1933
1934 BLOCK_INPUT; /* getcwd uses malloc */
1935 spath = npath = getcwd ((char *) 0, MAXPATHLEN);
1936 if (spath == 0)
1937 {
1938 UNBLOCK_INPUT;
1939 return spath;
1940 }
1941 /* On Altos 3068, getcwd can return @hostname/dir, so discard
1942 up to first slash. Should be harmless on other systems. */
1943 while (*npath && *npath != '/')
1944 npath++;
1945 strcpy (pathname, npath);
1946 free (spath); /* getcwd uses malloc */
1947 UNBLOCK_INPUT;
1948 return pathname;
1949}
1950
1951#endif /* HAVE_GETWD */
1952
1953/*
1954 * Emulate rename using unlink/link. Note that this is
1955 * only partially correct. Also, doesn't enforce restriction
1956 * that files be of same type (regular->regular, dir->dir, etc).
1957 */
1958
1959#ifndef HAVE_RENAME
1960
1961int
1962rename (const char *from, const char *to)
1963{
1964 if (access (from, 0) == 0)
1965 {
1966 unlink (to);
1967 if (link (from, to) == 0)
1968 if (unlink (from) == 0)
1969 return (0);
1970 }
1971 return (-1);
1972}
1973
1974#endif
1975
1976
1977#if defined(HPUX) && !defined(HAVE_PERROR)
1978
1979/* HPUX curses library references perror, but as far as we know
1980 it won't be called. Anyway this definition will do for now. */
1981
1982void
1983perror (void)
1984{
1985}
1986#endif /* HPUX and not HAVE_PERROR */
1987
1988#ifndef HAVE_DUP2
1989
1990/*
1991 * Emulate BSD dup2. First close newd if it already exists.
1992 * Then, attempt to dup oldd. If not successful, call dup2 recursively
1993 * until we are, then close the unsuccessful ones.
1994 */
1995
1996int
1997dup2 (int oldd, int newd)
1998{
1999 register int fd, ret;
2000
2001 emacs_close (newd);
2002
2003#ifdef F_DUPFD
2004 return fcntl (oldd, F_DUPFD, newd);
2005#else
2006 fd = dup (old);
2007 if (fd == -1)
2008 return -1;
2009 if (fd == new)
2010 return new;
2011 ret = dup2 (old,new);
2012 emacs_close (fd);
2013 return ret;
2014#endif
2015}
2016
2017#endif /* not HAVE_DUP2 */
2018
2019/*
2020 * Gettimeofday. Simulate as much as possible. Only accurate
2021 * to nearest second. Emacs doesn't use tzp so ignore it for now.
2022 * Only needed when subprocesses are defined.
2023 */
2024
2025#ifndef HAVE_GETTIMEOFDAY
2026#ifdef HAVE_TIMEVAL
2027
2028int
2029gettimeofday (struct timeval *tp, struct timezone *tzp)
2030{
2031 extern long time (long);
2032
2033 tp->tv_sec = time ((long *)0);
2034 tp->tv_usec = 0;
2035 if (tzp != 0)
2036 tzp->tz_minuteswest = -1;
2037 return 0;
2038}
2039
2040#endif
2041#endif /* !HAVE_GETTIMEOFDAY && HAVE_TIMEVAL */
2042
2043/*
2044 * This function will go away as soon as all the stubs fixed. (fnf)
2045 */
2046
2047void
2048croak (char *badfunc)
2049{
2050 printf ("%s not yet implemented\r\n", badfunc);
2051 reset_all_sys_modes ();
2052 exit (1);
2053}
2054
2055#endif /* USG */
2056\f
2057/* Directory routines for systems that don't have them. */
2058
2059#ifdef HAVE_DIRENT_H
2060
2061#include <dirent.h>
2062
2063#if !defined (HAVE_CLOSEDIR)
2064
2065int
2066closedir (DIR *dirp /* stream from opendir */)
2067{
2068 int rtnval;
2069
2070 rtnval = emacs_close (dirp->dd_fd);
2071 xfree ((char *) dirp);
2072
2073 return rtnval;
2074}
2075#endif /* not HAVE_CLOSEDIR */
2076#endif /* HAVE_DIRENT_H */
2077
2078\f
2079int
2080set_file_times (const char *filename, EMACS_TIME atime, EMACS_TIME mtime)
2081{
2082#ifdef HAVE_UTIMES
2083 struct timeval tv[2];
2084 tv[0] = atime;
2085 tv[1] = mtime;
2086 return utimes (filename, tv);
2087#else /* not HAVE_UTIMES */
2088 struct utimbuf utb;
2089 utb.actime = EMACS_SECS (atime);
2090 utb.modtime = EMACS_SECS (mtime);
2091 return utime (filename, &utb);
2092#endif /* not HAVE_UTIMES */
2093}
2094\f
2095/* mkdir and rmdir functions, for systems which don't have them. */
2096
2097#ifndef HAVE_MKDIR
2098/*
2099 * Written by Robert Rother, Mariah Corporation, August 1985.
2100 *
2101 * If you want it, it's yours. All I ask in return is that if you
2102 * figure out how to do this in a Bourne Shell script you send me
2103 * a copy.
2104 * sdcsvax!rmr or rmr@uscd
2105 *
2106 * Severely hacked over by John Gilmore to make a 4.2BSD compatible
2107 * subroutine. 11Mar86; hoptoad!gnu
2108 *
2109 * Modified by rmtodd@uokmax 6-28-87 -- when making an already existing dir,
2110 * subroutine didn't return EEXIST. It does now.
2111 */
2112
2113/*
2114 * Make a directory.
2115 */
2116int
2117mkdir (char *dpath, int dmode)
2118{
2119 int cpid, status, fd;
2120 struct stat statbuf;
2121
2122 if (stat (dpath, &statbuf) == 0)
2123 {
2124 errno = EEXIST; /* Stat worked, so it already exists */
2125 return -1;
2126 }
2127
2128 /* If stat fails for a reason other than non-existence, return error */
2129 if (errno != ENOENT)
2130 return -1;
2131
2132 synch_process_alive = 1;
2133 switch (cpid = fork ())
2134 {
2135
2136 case -1: /* Error in fork */
2137 return (-1); /* Errno is set already */
2138
2139 case 0: /* Child process */
2140 /*
2141 * Cheap hack to set mode of new directory. Since this
2142 * child process is going away anyway, we zap its umask.
2143 * FIXME, this won't suffice to set SUID, SGID, etc. on this
2144 * directory. Does anybody care?
2145 */
2146 status = umask (0); /* Get current umask */
2147 status = umask (status | (0777 & ~dmode)); /* Set for mkdir */
2148 fd = emacs_open ("/dev/null", O_RDWR, 0);
2149 if (fd >= 0)
2150 {
2151 dup2 (fd, 0);
2152 dup2 (fd, 1);
2153 dup2 (fd, 2);
2154 }
2155 execl ("/bin/mkdir", "mkdir", dpath, (char *) 0);
2156 _exit (-1); /* Can't exec /bin/mkdir */
2157
2158 default: /* Parent process */
2159 wait_for_termination (cpid);
2160 }
2161
2162 if (synch_process_death != 0 || synch_process_retcode != 0
2163 || synch_process_termsig != 0)
2164 {
2165 errno = EIO; /* We don't know why, but */
2166 return -1; /* /bin/mkdir failed */
2167 }
2168
2169 return 0;
2170}
2171#endif /* not HAVE_MKDIR */
2172
2173#ifndef HAVE_RMDIR
2174int
2175rmdir (char *dpath)
2176{
2177 int cpid, status, fd;
2178 struct stat statbuf;
2179
2180 if (stat (dpath, &statbuf) != 0)
2181 {
2182 /* Stat just set errno. We don't have to */
2183 return -1;
2184 }
2185
2186 synch_process_alive = 1;
2187 switch (cpid = fork ())
2188 {
2189
2190 case -1: /* Error in fork */
2191 return (-1); /* Errno is set already */
2192
2193 case 0: /* Child process */
2194 fd = emacs_open ("/dev/null", O_RDWR, 0);
2195 if (fd >= 0)
2196 {
2197 dup2 (fd, 0);
2198 dup2 (fd, 1);
2199 dup2 (fd, 2);
2200 }
2201 execl ("/bin/rmdir", "rmdir", dpath, (char *) 0);
2202 _exit (-1); /* Can't exec /bin/rmdir */
2203
2204 default: /* Parent process */
2205 wait_for_termination (cpid);
2206 }
2207
2208 if (synch_process_death != 0 || synch_process_retcode != 0
2209 || synch_process_termsig != 0)
2210 {
2211 errno = EIO; /* We don't know why, but */
2212 return -1; /* /bin/rmdir failed */
2213 }
2214
2215 return 0;
2216}
2217#endif /* !HAVE_RMDIR */
2218
2219\f
2220#ifndef HAVE_MEMSET
2221void *
2222memset (void *b, int n, size_t length)
2223{
2224 unsigned char *p = b;
2225 while (length-- > 0)
2226 *p++ = n;
2227 return b;
2228}
2229#endif /* !HAVE_MEMSET */
2230
2231#ifndef HAVE_MEMCPY
2232void *
2233memcpy (void *b1, void *b2, size_t length)
2234{
2235 unsigned char *p1 = b1, *p2 = b2;
2236 while (length-- > 0)
2237 *p1++ = *p2++;
2238 return b1;
2239}
2240#endif /* !HAVE_MEMCPY */
2241
2242#ifndef HAVE_MEMMOVE
2243void *
2244memmove (void *b1, void *b2, size_t length)
2245{
2246 unsigned char *p1 = b1, *p2 = b2;
2247 if (p1 < p2 || p1 >= p2 + length)
2248 while (length-- > 0)
2249 *p1++ = *p2++;
2250 else
2251 {
2252 p1 += length;
2253 p2 += length;
2254 while (length-- > 0)
2255 *--p1 = *--p2;
2256 }
2257 return b1;
2258}
2259#endif /* !HAVE_MEMCPY */
2260
2261#ifndef HAVE_MEMCMP
2262int
2263memcmp (void *b1, void *b2, size_t length)
2264{
2265 unsigned char *p1 = b1, *p2 = b2;
2266 while (length-- > 0)
2267 if (*p1++ != *p2++)
2268 return p1[-1] < p2[-1] ? -1 : 1;
2269 return 0;
2270}
2271#endif /* !HAVE_MEMCMP */
2272\f
2273#ifndef HAVE_STRSIGNAL
2274char *
2275strsignal (int code)
2276{
2277 char *signame = 0;
2278
2279 if (0 <= code && code < NSIG)
2280 {
2281 /* Cast to suppress warning if the table has const char *. */
2282 signame = (char *) sys_siglist[code];
2283 }
2284
2285 return signame;
2286}
2287#endif /* HAVE_STRSIGNAL */
2288\f
2289#ifndef DOS_NT
2290/* For make-serial-process */
2291int
2292serial_open (char *port)
2293{
2294 int fd = -1;
2295
2296 fd = emacs_open ((char*) port,
2297 O_RDWR
2298#ifdef O_NONBLOCK
2299 | O_NONBLOCK
2300#else
2301 | O_NDELAY
2302#endif
2303#ifdef O_NOCTTY
2304 | O_NOCTTY
2305#endif
2306 , 0);
2307 if (fd < 0)
2308 {
2309 error ("Could not open %s: %s",
2310 port, emacs_strerror (errno));
2311 }
2312#ifdef TIOCEXCL
2313 ioctl (fd, TIOCEXCL, (char *) 0);
2314#endif
2315
2316 return fd;
2317}
2318
2319#if !defined (HAVE_CFMAKERAW)
2320/* Workaround for targets which are missing cfmakeraw. */
2321/* Pasted from man page. */
2322static void
2323cfmakeraw (struct termios *termios_p)
2324{
2325 termios_p->c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON);
2326 termios_p->c_oflag &= ~OPOST;
2327 termios_p->c_lflag &= ~(ECHO|ECHONL|ICANON|ISIG|IEXTEN);
2328 termios_p->c_cflag &= ~(CSIZE|PARENB);
2329 termios_p->c_cflag |= CS8;
2330}
2331#endif /* !defined (HAVE_CFMAKERAW */
2332
2333#if !defined (HAVE_CFSETSPEED)
2334/* Workaround for targets which are missing cfsetspeed. */
2335static int
2336cfsetspeed (struct termios *termios_p, speed_t vitesse)
2337{
2338 return (cfsetispeed (termios_p, vitesse)
2339 + cfsetospeed (termios_p, vitesse));
2340}
2341#endif
2342
2343/* For serial-process-configure */
2344void
2345serial_configure (struct Lisp_Process *p,
2346 Lisp_Object contact)
2347{
2348 Lisp_Object childp2 = Qnil;
2349 Lisp_Object tem = Qnil;
2350 struct termios attr;
2351 int err = -1;
2352 char summary[4] = "???"; /* This usually becomes "8N1". */
2353
2354 childp2 = Fcopy_sequence (p->childp);
2355
2356 /* Read port attributes and prepare default configuration. */
2357 err = tcgetattr (p->outfd, &attr);
2358 if (err != 0)
2359 error ("tcgetattr() failed: %s", emacs_strerror (errno));
2360 cfmakeraw (&attr);
2361#if defined (CLOCAL)
2362 attr.c_cflag |= CLOCAL;
2363#endif
2364#if defined (CREAD)
2365 attr.c_cflag |= CREAD;
2366#endif
2367
2368 /* Configure speed. */
2369 if (!NILP (Fplist_member (contact, QCspeed)))
2370 tem = Fplist_get (contact, QCspeed);
2371 else
2372 tem = Fplist_get (p->childp, QCspeed);
2373 CHECK_NUMBER (tem);
2374 err = cfsetspeed (&attr, XINT (tem));
2375 if (err != 0)
2376 error ("cfsetspeed(%"pEd") failed: %s", XINT (tem),
2377 emacs_strerror (errno));
2378 childp2 = Fplist_put (childp2, QCspeed, tem);
2379
2380 /* Configure bytesize. */
2381 if (!NILP (Fplist_member (contact, QCbytesize)))
2382 tem = Fplist_get (contact, QCbytesize);
2383 else
2384 tem = Fplist_get (p->childp, QCbytesize);
2385 if (NILP (tem))
2386 tem = make_number (8);
2387 CHECK_NUMBER (tem);
2388 if (XINT (tem) != 7 && XINT (tem) != 8)
2389 error (":bytesize must be nil (8), 7, or 8");
2390 summary[0] = XINT (tem) + '0';
2391#if defined (CSIZE) && defined (CS7) && defined (CS8)
2392 attr.c_cflag &= ~CSIZE;
2393 attr.c_cflag |= ((XINT (tem) == 7) ? CS7 : CS8);
2394#else
2395 /* Don't error on bytesize 8, which should be set by cfmakeraw. */
2396 if (XINT (tem) != 8)
2397 error ("Bytesize cannot be changed");
2398#endif
2399 childp2 = Fplist_put (childp2, QCbytesize, tem);
2400
2401 /* Configure parity. */
2402 if (!NILP (Fplist_member (contact, QCparity)))
2403 tem = Fplist_get (contact, QCparity);
2404 else
2405 tem = Fplist_get (p->childp, QCparity);
2406 if (!NILP (tem) && !EQ (tem, Qeven) && !EQ (tem, Qodd))
2407 error (":parity must be nil (no parity), `even', or `odd'");
2408#if defined (PARENB) && defined (PARODD) && defined (IGNPAR) && defined (INPCK)
2409 attr.c_cflag &= ~(PARENB | PARODD);
2410 attr.c_iflag &= ~(IGNPAR | INPCK);
2411 if (NILP (tem))
2412 {
2413 summary[1] = 'N';
2414 }
2415 else if (EQ (tem, Qeven))
2416 {
2417 summary[1] = 'E';
2418 attr.c_cflag |= PARENB;
2419 attr.c_iflag |= (IGNPAR | INPCK);
2420 }
2421 else if (EQ (tem, Qodd))
2422 {
2423 summary[1] = 'O';
2424 attr.c_cflag |= (PARENB | PARODD);
2425 attr.c_iflag |= (IGNPAR | INPCK);
2426 }
2427#else
2428 /* Don't error on no parity, which should be set by cfmakeraw. */
2429 if (!NILP (tem))
2430 error ("Parity cannot be configured");
2431#endif
2432 childp2 = Fplist_put (childp2, QCparity, tem);
2433
2434 /* Configure stopbits. */
2435 if (!NILP (Fplist_member (contact, QCstopbits)))
2436 tem = Fplist_get (contact, QCstopbits);
2437 else
2438 tem = Fplist_get (p->childp, QCstopbits);
2439 if (NILP (tem))
2440 tem = make_number (1);
2441 CHECK_NUMBER (tem);
2442 if (XINT (tem) != 1 && XINT (tem) != 2)
2443 error (":stopbits must be nil (1 stopbit), 1, or 2");
2444 summary[2] = XINT (tem) + '0';
2445#if defined (CSTOPB)
2446 attr.c_cflag &= ~CSTOPB;
2447 if (XINT (tem) == 2)
2448 attr.c_cflag |= CSTOPB;
2449#else
2450 /* Don't error on 1 stopbit, which should be set by cfmakeraw. */
2451 if (XINT (tem) != 1)
2452 error ("Stopbits cannot be configured");
2453#endif
2454 childp2 = Fplist_put (childp2, QCstopbits, tem);
2455
2456 /* Configure flowcontrol. */
2457 if (!NILP (Fplist_member (contact, QCflowcontrol)))
2458 tem = Fplist_get (contact, QCflowcontrol);
2459 else
2460 tem = Fplist_get (p->childp, QCflowcontrol);
2461 if (!NILP (tem) && !EQ (tem, Qhw) && !EQ (tem, Qsw))
2462 error (":flowcontrol must be nil (no flowcontrol), `hw', or `sw'");
2463#if defined (CRTSCTS)
2464 attr.c_cflag &= ~CRTSCTS;
2465#endif
2466#if defined (CNEW_RTSCTS)
2467 attr.c_cflag &= ~CNEW_RTSCTS;
2468#endif
2469#if defined (IXON) && defined (IXOFF)
2470 attr.c_iflag &= ~(IXON | IXOFF);
2471#endif
2472 if (NILP (tem))
2473 {
2474 /* Already configured. */
2475 }
2476 else if (EQ (tem, Qhw))
2477 {
2478#if defined (CRTSCTS)
2479 attr.c_cflag |= CRTSCTS;
2480#elif defined (CNEW_RTSCTS)
2481 attr.c_cflag |= CNEW_RTSCTS;
2482#else
2483 error ("Hardware flowcontrol (RTS/CTS) not supported");
2484#endif
2485 }
2486 else if (EQ (tem, Qsw))
2487 {
2488#if defined (IXON) && defined (IXOFF)
2489 attr.c_iflag |= (IXON | IXOFF);
2490#else
2491 error ("Software flowcontrol (XON/XOFF) not supported");
2492#endif
2493 }
2494 childp2 = Fplist_put (childp2, QCflowcontrol, tem);
2495
2496 /* Activate configuration. */
2497 err = tcsetattr (p->outfd, TCSANOW, &attr);
2498 if (err != 0)
2499 error ("tcsetattr() failed: %s", emacs_strerror (errno));
2500
2501 childp2 = Fplist_put (childp2, QCsummary, build_string (summary));
2502 p->childp = childp2;
2503
2504}
2505#endif /* not DOS_NT */
2506\f
2507/* System depended enumeration of and access to system processes a-la ps(1). */
2508
2509#ifdef HAVE_PROCFS
2510
2511/* Process enumeration and access via /proc. */
2512
2513Lisp_Object
2514list_system_processes (void)
2515{
2516 Lisp_Object procdir, match, proclist, next;
2517 struct gcpro gcpro1, gcpro2;
2518 register Lisp_Object tail;
2519
2520 GCPRO2 (procdir, match);
2521 /* For every process on the system, there's a directory in the
2522 "/proc" pseudo-directory whose name is the numeric ID of that
2523 process. */
2524 procdir = build_string ("/proc");
2525 match = build_string ("[0-9]+");
2526 proclist = directory_files_internal (procdir, Qnil, match, Qt, 0, Qnil);
2527
2528 /* `proclist' gives process IDs as strings. Destructively convert
2529 each string into a number. */
2530 for (tail = proclist; CONSP (tail); tail = next)
2531 {
2532 next = XCDR (tail);
2533 XSETCAR (tail, Fstring_to_number (XCAR (tail), Qnil));
2534 }
2535 UNGCPRO;
2536
2537 /* directory_files_internal returns the files in reverse order; undo
2538 that. */
2539 proclist = Fnreverse (proclist);
2540 return proclist;
2541}
2542
2543/* The WINDOWSNT implementation is in w32.c.
2544 The MSDOS implementation is in dosfns.c. */
2545#elif !defined (WINDOWSNT) && !defined (MSDOS)
2546
2547Lisp_Object
2548list_system_processes (void)
2549{
2550 return Qnil;
2551}
2552
2553#endif /* !defined (WINDOWSNT) */
2554
2555#ifdef GNU_LINUX
2556static void
2557time_from_jiffies (unsigned long long tval, long hz,
2558 time_t *sec, unsigned *usec)
2559{
2560 unsigned long long ullsec;
2561
2562 *sec = tval / hz;
2563 ullsec = *sec;
2564 tval -= ullsec * hz;
2565 /* Careful: if HZ > 1 million, then integer division by it yields zero. */
2566 if (hz <= 1000000)
2567 *usec = tval * 1000000 / hz;
2568 else
2569 *usec = tval / (hz / 1000000);
2570}
2571
2572static Lisp_Object
2573ltime_from_jiffies (unsigned long long tval, long hz)
2574{
2575 time_t sec;
2576 unsigned usec;
2577
2578 time_from_jiffies (tval, hz, &sec, &usec);
2579
2580 return list3 (make_number ((sec >> 16) & 0xffff),
2581 make_number (sec & 0xffff),
2582 make_number (usec));
2583}
2584
2585static void
2586get_up_time (time_t *sec, unsigned *usec)
2587{
2588 FILE *fup;
2589
2590 *sec = *usec = 0;
2591
2592 BLOCK_INPUT;
2593 fup = fopen ("/proc/uptime", "r");
2594
2595 if (fup)
2596 {
2597 double uptime, idletime;
2598
2599 /* The numbers in /proc/uptime use C-locale decimal point, but
2600 we already set ourselves to the C locale (see `fixup_locale'
2601 in emacs.c). */
2602 if (2 <= fscanf (fup, "%lf %lf", &uptime, &idletime))
2603 {
2604 *sec = uptime;
2605 *usec = (uptime - *sec) * 1000000;
2606 }
2607 fclose (fup);
2608 }
2609 UNBLOCK_INPUT;
2610}
2611
2612#define MAJOR(d) (((unsigned)(d) >> 8) & 0xfff)
2613#define MINOR(d) (((unsigned)(d) & 0xff) | (((unsigned)(d) & 0xfff00000) >> 12))
2614
2615static Lisp_Object
2616procfs_ttyname (int rdev)
2617{
2618 FILE *fdev = NULL;
2619 char name[PATH_MAX];
2620
2621 BLOCK_INPUT;
2622 fdev = fopen ("/proc/tty/drivers", "r");
2623
2624 if (fdev)
2625 {
2626 unsigned major;
2627 unsigned long minor_beg, minor_end;
2628 char minor[25]; /* 2 32-bit numbers + dash */
2629 char *endp;
2630
2631 while (!feof (fdev) && !ferror (fdev))
2632 {
2633 if (3 <= fscanf (fdev, "%*s %s %u %s %*s\n", name, &major, minor)
2634 && major == MAJOR (rdev))
2635 {
2636 minor_beg = strtoul (minor, &endp, 0);
2637 if (*endp == '\0')
2638 minor_end = minor_beg;
2639 else if (*endp == '-')
2640 minor_end = strtoul (endp + 1, &endp, 0);
2641 else
2642 continue;
2643
2644 if (MINOR (rdev) >= minor_beg && MINOR (rdev) <= minor_end)
2645 {
2646 sprintf (name + strlen (name), "%u", MINOR (rdev));
2647 break;
2648 }
2649 }
2650 }
2651 fclose (fdev);
2652 }
2653 UNBLOCK_INPUT;
2654 return build_string (name);
2655}
2656
2657static unsigned long
2658procfs_get_total_memory (void)
2659{
2660 FILE *fmem = NULL;
2661 unsigned long retval = 2 * 1024 * 1024; /* default: 2GB */
2662
2663 BLOCK_INPUT;
2664 fmem = fopen ("/proc/meminfo", "r");
2665
2666 if (fmem)
2667 {
2668 unsigned long entry_value;
2669 char entry_name[20]; /* the longest I saw is 13+1 */
2670
2671 while (!feof (fmem) && !ferror (fmem))
2672 {
2673 if (2 <= fscanf (fmem, "%s %lu kB\n", entry_name, &entry_value)
2674 && strcmp (entry_name, "MemTotal:") == 0)
2675 {
2676 retval = entry_value;
2677 break;
2678 }
2679 }
2680 fclose (fmem);
2681 }
2682 UNBLOCK_INPUT;
2683 return retval;
2684}
2685
2686Lisp_Object
2687system_process_attributes (Lisp_Object pid)
2688{
2689 char procfn[PATH_MAX], fn[PATH_MAX];
2690 struct stat st;
2691 struct passwd *pw;
2692 struct group *gr;
2693 long clocks_per_sec;
2694 char *procfn_end;
2695 char procbuf[1025], *p, *q;
2696 int fd;
2697 ssize_t nread;
2698 const char *cmd = NULL;
2699 char *cmdline = NULL;
2700 size_t cmdsize = 0, cmdline_size;
2701 unsigned char c;
2702 int proc_id, ppid, uid, gid, pgrp, sess, tty, tpgid, thcount;
2703 unsigned long long u_time, s_time, cutime, cstime, start;
2704 long priority, niceness, rss;
2705 unsigned long minflt, majflt, cminflt, cmajflt, vsize;
2706 time_t sec;
2707 unsigned usec;
2708 EMACS_TIME tnow, tstart, tboot, telapsed;
2709 double pcpu, pmem;
2710 Lisp_Object attrs = Qnil;
2711 Lisp_Object cmd_str, decoded_cmd, tem;
2712 struct gcpro gcpro1, gcpro2;
2713 EMACS_INT uid_eint, gid_eint;
2714
2715 CHECK_NUMBER_OR_FLOAT (pid);
2716 proc_id = FLOATP (pid) ? XFLOAT_DATA (pid) : XINT (pid);
2717 sprintf (procfn, "/proc/%u", proc_id);
2718 if (stat (procfn, &st) < 0)
2719 return attrs;
2720
2721 GCPRO2 (attrs, decoded_cmd);
2722
2723 /* euid egid */
2724 uid = st.st_uid;
2725 /* Use of EMACS_INT stops GCC whining about limited range of data type. */
2726 uid_eint = uid;
2727 attrs = Fcons (Fcons (Qeuid, make_fixnum_or_float (uid_eint)), attrs);
2728 BLOCK_INPUT;
2729 pw = getpwuid (uid);
2730 UNBLOCK_INPUT;
2731 if (pw)
2732 attrs = Fcons (Fcons (Quser, build_string (pw->pw_name)), attrs);
2733
2734 gid = st.st_gid;
2735 gid_eint = gid;
2736 attrs = Fcons (Fcons (Qegid, make_fixnum_or_float (gid_eint)), attrs);
2737 BLOCK_INPUT;
2738 gr = getgrgid (gid);
2739 UNBLOCK_INPUT;
2740 if (gr)
2741 attrs = Fcons (Fcons (Qgroup, build_string (gr->gr_name)), attrs);
2742
2743 strcpy (fn, procfn);
2744 procfn_end = fn + strlen (fn);
2745 strcpy (procfn_end, "/stat");
2746 fd = emacs_open (fn, O_RDONLY, 0);
2747 if (fd >= 0 && (nread = emacs_read (fd, procbuf, sizeof (procbuf) - 1)) > 0)
2748 {
2749 procbuf[nread] = '\0';
2750 p = procbuf;
2751
2752 p = strchr (p, '(');
2753 if (p != NULL)
2754 {
2755 q = strrchr (p + 1, ')');
2756 /* comm */
2757 if (q != NULL)
2758 {
2759 cmd = p + 1;
2760 cmdsize = q - cmd;
2761 }
2762 }
2763 else
2764 q = NULL;
2765 if (cmd == NULL)
2766 {
2767 cmd = "???";
2768 cmdsize = 3;
2769 }
2770 /* Command name is encoded in locale-coding-system; decode it. */
2771 cmd_str = make_unibyte_string (cmd, cmdsize);
2772 decoded_cmd = code_convert_string_norecord (cmd_str,
2773 Vlocale_coding_system, 0);
2774 attrs = Fcons (Fcons (Qcomm, decoded_cmd), attrs);
2775
2776 if (q)
2777 {
2778 EMACS_INT ppid_eint, pgrp_eint, sess_eint, tpgid_eint, thcount_eint;
2779 p = q + 2;
2780 /* state ppid pgrp sess tty tpgid . minflt cminflt majflt cmajflt utime stime cutime cstime priority nice thcount . start vsize rss */
2781 sscanf (p, "%c %d %d %d %d %d %*u %lu %lu %lu %lu %Lu %Lu %Lu %Lu %ld %ld %d %*d %Lu %lu %ld",
2782 &c, &ppid, &pgrp, &sess, &tty, &tpgid,
2783 &minflt, &cminflt, &majflt, &cmajflt,
2784 &u_time, &s_time, &cutime, &cstime,
2785 &priority, &niceness, &thcount, &start, &vsize, &rss);
2786 {
2787 char state_str[2];
2788
2789 state_str[0] = c;
2790 state_str[1] = '\0';
2791 tem = build_string (state_str);
2792 attrs = Fcons (Fcons (Qstate, tem), attrs);
2793 }
2794 /* Stops GCC whining about limited range of data type. */
2795 ppid_eint = ppid;
2796 pgrp_eint = pgrp;
2797 sess_eint = sess;
2798 tpgid_eint = tpgid;
2799 thcount_eint = thcount;
2800 attrs = Fcons (Fcons (Qppid, make_fixnum_or_float (ppid_eint)), attrs);
2801 attrs = Fcons (Fcons (Qpgrp, make_fixnum_or_float (pgrp_eint)), attrs);
2802 attrs = Fcons (Fcons (Qsess, make_fixnum_or_float (sess_eint)), attrs);
2803 attrs = Fcons (Fcons (Qttname, procfs_ttyname (tty)), attrs);
2804 attrs = Fcons (Fcons (Qtpgid, make_fixnum_or_float (tpgid_eint)), attrs);
2805 attrs = Fcons (Fcons (Qminflt, make_fixnum_or_float (minflt)), attrs);
2806 attrs = Fcons (Fcons (Qmajflt, make_fixnum_or_float (majflt)), attrs);
2807 attrs = Fcons (Fcons (Qcminflt, make_fixnum_or_float (cminflt)), attrs);
2808 attrs = Fcons (Fcons (Qcmajflt, make_fixnum_or_float (cmajflt)), attrs);
2809 clocks_per_sec = sysconf (_SC_CLK_TCK);
2810 if (clocks_per_sec < 0)
2811 clocks_per_sec = 100;
2812 attrs = Fcons (Fcons (Qutime,
2813 ltime_from_jiffies (u_time, clocks_per_sec)),
2814 attrs);
2815 attrs = Fcons (Fcons (Qstime,
2816 ltime_from_jiffies (s_time, clocks_per_sec)),
2817 attrs);
2818 attrs = Fcons (Fcons (Qtime,
2819 ltime_from_jiffies (s_time + u_time,
2820 clocks_per_sec)),
2821 attrs);
2822 attrs = Fcons (Fcons (Qcutime,
2823 ltime_from_jiffies (cutime, clocks_per_sec)),
2824 attrs);
2825 attrs = Fcons (Fcons (Qcstime,
2826 ltime_from_jiffies (cstime, clocks_per_sec)),
2827 attrs);
2828 attrs = Fcons (Fcons (Qctime,
2829 ltime_from_jiffies (cstime+cutime, clocks_per_sec)),
2830 attrs);
2831 attrs = Fcons (Fcons (Qpri, make_number (priority)), attrs);
2832 attrs = Fcons (Fcons (Qnice, make_number (niceness)), attrs);
2833 attrs = Fcons (Fcons (Qthcount, make_fixnum_or_float (thcount_eint)), attrs);
2834 EMACS_GET_TIME (tnow);
2835 get_up_time (&sec, &usec);
2836 EMACS_SET_SECS (telapsed, sec);
2837 EMACS_SET_USECS (telapsed, usec);
2838 EMACS_SUB_TIME (tboot, tnow, telapsed);
2839 time_from_jiffies (start, clocks_per_sec, &sec, &usec);
2840 EMACS_SET_SECS (tstart, sec);
2841 EMACS_SET_USECS (tstart, usec);
2842 EMACS_ADD_TIME (tstart, tboot, tstart);
2843 attrs = Fcons (Fcons (Qstart,
2844 list3 (make_number
2845 ((EMACS_SECS (tstart) >> 16) & 0xffff),
2846 make_number
2847 (EMACS_SECS (tstart) & 0xffff),
2848 make_number
2849 (EMACS_USECS (tstart)))),
2850 attrs);
2851 attrs = Fcons (Fcons (Qvsize, make_fixnum_or_float (vsize/1024)), attrs);
2852 attrs = Fcons (Fcons (Qrss, make_fixnum_or_float (4*rss)), attrs);
2853 EMACS_SUB_TIME (telapsed, tnow, tstart);
2854 attrs = Fcons (Fcons (Qetime,
2855 list3 (make_number
2856 ((EMACS_SECS (telapsed) >> 16) & 0xffff),
2857 make_number
2858 (EMACS_SECS (telapsed) & 0xffff),
2859 make_number
2860 (EMACS_USECS (telapsed)))),
2861 attrs);
2862 time_from_jiffies (u_time + s_time, clocks_per_sec, &sec, &usec);
2863 pcpu = (sec + usec / 1000000.0) / (EMACS_SECS (telapsed) + EMACS_USECS (telapsed) / 1000000.0);
2864 if (pcpu > 1.0)
2865 pcpu = 1.0;
2866 attrs = Fcons (Fcons (Qpcpu, make_float (100 * pcpu)), attrs);
2867 pmem = 4.0 * 100 * rss / procfs_get_total_memory ();
2868 if (pmem > 100)
2869 pmem = 100;
2870 attrs = Fcons (Fcons (Qpmem, make_float (pmem)), attrs);
2871 }
2872 }
2873 if (fd >= 0)
2874 emacs_close (fd);
2875
2876 /* args */
2877 strcpy (procfn_end, "/cmdline");
2878 fd = emacs_open (fn, O_RDONLY, 0);
2879 if (fd >= 0)
2880 {
2881 char ch;
2882 for (cmdline_size = 0; emacs_read (fd, &ch, 1) == 1; cmdline_size++)
2883 {
2884 c = ch;
2885 if (isspace (c) || c == '\\')
2886 cmdline_size++; /* for later quoting, see below */
2887 }
2888 if (cmdline_size)
2889 {
2890 cmdline = xmalloc (cmdline_size + 1);
2891 lseek (fd, 0L, SEEK_SET);
2892 cmdline[0] = '\0';
2893 if ((nread = read (fd, cmdline, cmdline_size)) >= 0)
2894 cmdline[nread++] = '\0';
2895 else
2896 {
2897 /* Assigning zero to `nread' makes us skip the following
2898 two loops, assign zero to cmdline_size, and enter the
2899 following `if' clause that handles unknown command
2900 lines. */
2901 nread = 0;
2902 }
2903 /* We don't want trailing null characters. */
2904 for (p = cmdline + nread - 1; p > cmdline && !*p; p--)
2905 nread--;
2906 for (p = cmdline; p < cmdline + nread; p++)
2907 {
2908 /* Escape-quote whitespace and backslashes. */
2909 if (isspace (*p) || *p == '\\')
2910 {
2911 memmove (p + 1, p, nread - (p - cmdline));
2912 nread++;
2913 *p++ = '\\';
2914 }
2915 else if (*p == '\0')
2916 *p = ' ';
2917 }
2918 cmdline_size = nread;
2919 }
2920 if (!cmdline_size)
2921 {
2922 if (!cmd)
2923 cmd = "???";
2924 if (!cmdsize)
2925 cmdsize = strlen (cmd);
2926 cmdline_size = cmdsize + 2;
2927 cmdline = xmalloc (cmdline_size + 1);
2928 strcpy (cmdline, "[");
2929 strcat (strncat (cmdline, cmd, cmdsize), "]");
2930 }
2931 emacs_close (fd);
2932 /* Command line is encoded in locale-coding-system; decode it. */
2933 cmd_str = make_unibyte_string (cmdline, cmdline_size);
2934 decoded_cmd = code_convert_string_norecord (cmd_str,
2935 Vlocale_coding_system, 0);
2936 xfree (cmdline);
2937 attrs = Fcons (Fcons (Qargs, decoded_cmd), attrs);
2938 }
2939
2940 UNGCPRO;
2941 return attrs;
2942}
2943
2944#elif defined (SOLARIS2) && defined (HAVE_PROCFS)
2945
2946/* The <procfs.h> header does not like to be included if _LP64 is defined and
2947 __FILE_OFFSET_BITS == 64. This is an ugly workaround that. */
2948#if !defined (_LP64) && defined (_FILE_OFFSET_BITS) && (_FILE_OFFSET_BITS == 64)
2949#define PROCFS_FILE_OFFSET_BITS_HACK 1
2950#undef _FILE_OFFSET_BITS
2951#else
2952#define PROCFS_FILE_OFFSET_BITS_HACK 0
2953#endif
2954
2955#include <procfs.h>
2956
2957#if PROCFS_FILE_OFFSET_BITS_HACK == 1
2958#define _FILE_OFFSET_BITS 64
2959#endif /* PROCFS_FILE_OFFSET_BITS_HACK == 1 */
2960
2961Lisp_Object
2962system_process_attributes (Lisp_Object pid)
2963{
2964 char procfn[PATH_MAX], fn[PATH_MAX];
2965 struct stat st;
2966 struct passwd *pw;
2967 struct group *gr;
2968 char *procfn_end;
2969 struct psinfo pinfo;
2970 int fd;
2971 ssize_t nread;
2972 int proc_id, uid, gid;
2973 Lisp_Object attrs = Qnil;
2974 Lisp_Object decoded_cmd, tem;
2975 struct gcpro gcpro1, gcpro2;
2976 EMACS_INT uid_eint, gid_eint;
2977
2978 CHECK_NUMBER_OR_FLOAT (pid);
2979 proc_id = FLOATP (pid) ? XFLOAT_DATA (pid) : XINT (pid);
2980 sprintf (procfn, "/proc/%u", proc_id);
2981 if (stat (procfn, &st) < 0)
2982 return attrs;
2983
2984 GCPRO2 (attrs, decoded_cmd);
2985
2986 /* euid egid */
2987 uid = st.st_uid;
2988 /* Use of EMACS_INT stops GCC whining about limited range of data type. */
2989 uid_eint = uid;
2990 attrs = Fcons (Fcons (Qeuid, make_fixnum_or_float (uid_eint)), attrs);
2991 BLOCK_INPUT;
2992 pw = getpwuid (uid);
2993 UNBLOCK_INPUT;
2994 if (pw)
2995 attrs = Fcons (Fcons (Quser, build_string (pw->pw_name)), attrs);
2996
2997 gid = st.st_gid;
2998 gid_eint = gid;
2999 attrs = Fcons (Fcons (Qegid, make_fixnum_or_float (gid_eint)), attrs);
3000 BLOCK_INPUT;
3001 gr = getgrgid (gid);
3002 UNBLOCK_INPUT;
3003 if (gr)
3004 attrs = Fcons (Fcons (Qgroup, build_string (gr->gr_name)), attrs);
3005
3006 strcpy (fn, procfn);
3007 procfn_end = fn + strlen (fn);
3008 strcpy (procfn_end, "/psinfo");
3009 fd = emacs_open (fn, O_RDONLY, 0);
3010 if (fd >= 0
3011 && (nread = read (fd, (char*)&pinfo, sizeof (struct psinfo)) > 0))
3012 {
3013 attrs = Fcons (Fcons (Qppid, make_fixnum_or_float (pinfo.pr_ppid)), attrs);
3014 attrs = Fcons (Fcons (Qpgrp, make_fixnum_or_float (pinfo.pr_pgid)), attrs);
3015 attrs = Fcons (Fcons (Qsess, make_fixnum_or_float (pinfo.pr_sid)), attrs);
3016
3017 {
3018 char state_str[2];
3019 state_str[0] = pinfo.pr_lwp.pr_sname;
3020 state_str[1] = '\0';
3021 tem = build_string (state_str);
3022 attrs = Fcons (Fcons (Qstate, tem), attrs);
3023 }
3024
3025 /* FIXME: missing Qttyname. psinfo.pr_ttydev is a dev_t,
3026 need to get a string from it. */
3027
3028 /* FIXME: missing: Qtpgid */
3029
3030 /* FIXME: missing:
3031 Qminflt
3032 Qmajflt
3033 Qcminflt
3034 Qcmajflt
3035
3036 Qutime
3037 Qcutime
3038 Qstime
3039 Qcstime
3040 Are they available? */
3041
3042 attrs = Fcons (Fcons (Qtime,
3043 list3 (make_number (pinfo.pr_time.tv_sec >> 16),
3044 make_number (pinfo.pr_time.tv_sec & 0xffff),
3045 make_number (pinfo.pr_time.tv_nsec))),
3046 attrs);
3047
3048 attrs = Fcons (Fcons (Qctime,
3049 list3 (make_number (pinfo.pr_ctime.tv_sec >> 16),
3050 make_number (pinfo.pr_ctime.tv_sec & 0xffff),
3051 make_number (pinfo.pr_ctime.tv_nsec))),
3052 attrs);
3053
3054 attrs = Fcons (Fcons (Qpri, make_number (pinfo.pr_lwp.pr_pri)), attrs);
3055 attrs = Fcons (Fcons (Qnice, make_number (pinfo.pr_lwp.pr_nice)), attrs);
3056 attrs = Fcons (Fcons (Qthcount, make_fixnum_or_float (pinfo.pr_nlwp)), attrs);
3057
3058 attrs = Fcons (Fcons (Qstart,
3059 list3 (make_number (pinfo.pr_start.tv_sec >> 16),
3060 make_number (pinfo.pr_start.tv_sec & 0xffff),
3061 make_number (pinfo.pr_start.tv_nsec))),
3062 attrs);
3063 attrs = Fcons (Fcons (Qvsize, make_fixnum_or_float (pinfo.pr_size)), attrs);
3064 attrs = Fcons (Fcons (Qrss, make_fixnum_or_float (pinfo.pr_rssize)), attrs);
3065
3066 /* pr_pctcpu and pr_pctmem are encoded as a fixed point 16 bit number in [0 ... 1]. */
3067 attrs = Fcons (Fcons (Qpcpu, (pinfo.pr_pctcpu * 100.0) / (double)0x8000), attrs);
3068 attrs = Fcons (Fcons (Qpmem, (pinfo.pr_pctmem * 100.0) / (double)0x8000), attrs);
3069
3070 decoded_cmd
3071 = code_convert_string_norecord (make_unibyte_string (pinfo.pr_fname,
3072 strlen (pinfo.pr_fname)),
3073 Vlocale_coding_system, 0);
3074 attrs = Fcons (Fcons (Qcomm, decoded_cmd), attrs);
3075 decoded_cmd
3076 = code_convert_string_norecord (make_unibyte_string (pinfo.pr_psargs,
3077 strlen (pinfo.pr_psargs)),
3078 Vlocale_coding_system, 0);
3079 attrs = Fcons (Fcons (Qargs, decoded_cmd), attrs);
3080 }
3081
3082 if (fd >= 0)
3083 emacs_close (fd);
3084
3085 UNGCPRO;
3086 return attrs;
3087}
3088
3089/* The WINDOWSNT implementation is in w32.c.
3090 The MSDOS implementation is in dosfns.c. */
3091#elif !defined (WINDOWSNT) && !defined (MSDOS)
3092
3093Lisp_Object
3094system_process_attributes (Lisp_Object pid)
3095{
3096 return Qnil;
3097}
3098
3099#endif /* !defined (WINDOWSNT) */
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