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* eval.c (internal_lisp_condition_case): Don't pass spurious arg.
[bpt/emacs.git] / src / sysdep.c
CommitLineData
86a5659e 1/* Interfaces to system-dependent kernel and library entries.
73b0cd50 2 Copyright (C) 1985-1988, 1993-1995, 1999-2011
8cabe764 3 Free Software Foundation, Inc.
86a5659e
JB		 4
5This file is part of GNU Emacs.
6
9ec0b715 7GNU Emacs is free software: you can redistribute it and/or modify
86a5659e 8it under the terms of the GNU General Public License as published by
9ec0b715
GM		 9the Free Software Foundation, either version 3 of the License, or
10(at your option) any later version.
86a5659e
JB		 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
9ec0b715 18along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
86a5659e 19
4838e624 20#include <config.h>
2c55aacf 21#include <ctype.h>
86a5659e 22#include <signal.h>
5890e9f7 23#include <stdio.h>
86a5659e 24#include <setjmp.h>
06e111a6
DN		 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 */
d3eb3bfa 32#include <unistd.h>
53934c98 33
d1fdcab7
PE		 34#include <allocator.h>
35#include <careadlinkat.h>
67342916
PE		 36#include <ignore-value.h>
37
86a5659e 38#include "lisp.h"
819b8f00 39#include "sysselect.h"
9ac0d9e0 40#include "blockinput.h"
86a5659e 41
fe03522b 42#ifdef WINDOWSNT
e15b6288
JR		 43#define read sys_read
44#define write sys_write
fe03522b 45#include <windows.h>
e36ec798
AI		 46#ifndef NULL
47#define NULL 0
48#endif
fe03522b
RS		 49#endif /* not WINDOWSNT */
50
86a5659e
JB		 51#include <sys/types.h>
52#include <sys/stat.h>
53#include <errno.h>
54
f95c3f91 55#ifdef HAVE_SETPGID
58eb6cf0 56#if !defined (USG)
c8875a65 57#undef setpgrp
f95c3f91
GM		 58#define setpgrp setpgid
59#endif
2b7e8799 60#endif
f95c3f91 61
b05af5d3
PE		 62/* Get SI_SRPC_DOMAIN, if it is available. */
63#ifdef HAVE_SYS_SYSTEMINFO_H
64#include <sys/systeminfo.h>
65#endif
66
207bdbdb
RS		 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>
15614e61 72#endif
207bdbdb 73
bb4bc8e2 74#include <sys/file.h>
bb4bc8e2 75#include <fcntl.h>
86a5659e 76
e04a4e0d 77#include "systty.h"
94c8642a 78#include "syswait.h"
86a5659e 79
a7ebc409 80#ifdef HAVE_SYS_UTSNAME_H
86a5659e 81#include <sys/utsname.h>
86a5659e 82#include <memory.h>
a7ebc409 83#endif /* HAVE_SYS_UTSNAME_H */
86a5659e 84
e36ec798 85#include "keyboard.h"
0137dbf7 86#include "frame.h"
86a5659e
JB		 87#include "window.h"
88#include "termhooks.h"
89#include "termchar.h"
90#include "termopts.h"
91#include "dispextern.h"
92#include "process.h"
0a125897 93#include "cm.h" /* for reset_sys_modes */
86a5659e 94
fe03522b
RS		 95#ifdef WINDOWSNT
96#include <direct.h>
97/* In process.h which conflicts with the local copy. */
98#define _P_WAIT 0
43db14bb
JB		 99int _cdecl _spawnlp (int, const char *, const char *, ...);
100int _cdecl _getpid (void);
b6682dd9 101extern char *getwd (char *);
fe03522b
RS		 102#endif
103
91bac16a
JB		 104#include "syssignal.h"
105#include "systime.h"
d79998bc
KH		 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
86a5659e 120
ff2e8052
DN		 121/* Declare here, including term.h is problematic on some systems. */
122extern void tputs (const char *, int, int (*)(int));
123
91433552 124static const int baud_convert[] =
86a5659e
JB		 125 {
126 0, 50, 75, 110, 135, 150, 200, 300, 600, 1200,
127 1800, 2400, 4800, 9600, 19200, 38400
128 };
86a5659e 129
f57e2426 130void croak (char *) NO_RETURN;
b9c4113e 131
89723395
GM		 132/* Temporary used by `sigblock' when defined in terms of signprocmask. */
133
134SIGMASKTYPE sigprocmask_set;
135
f78f1a83 136
3480d92b 137#if !defined (HAVE_GET_CURRENT_DIR_NAME) || defined (BROKEN_GET_CURRENT_DIR_NAME)
f78f1a83 138
b6682dd9 139/* Return the current working directory. Returns NULL on errors.
f78f1a83
EZ		 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*
cf84bb53 143get_current_dir_name (void)
f78f1a83
EZ		 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;
b6682dd9 171 buf = (char *) malloc (buf_size);
f78f1a83
EZ		 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
64e971c3 211\f
9628b887 212/* Discard pending input on all input descriptors. */
91bac16a 213
08633194 214void
971de7fb 215discard_tty_input (void)
86a5659e 216{
fe03522b 217#ifndef WINDOWSNT
91bac16a 218 struct emacs_tty buf;
86a5659e
JB		 219
220 if (noninteractive)
221 return;
222
fe03522b 223#ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */
207bdbdb 224 while (dos_keyread () != -1)
fe03522b 225 ;
207bdbdb 226#else /* not MSDOS */
9628b887 227 {
28d7d09f 228 struct tty_display_info *tty;
9628b887
KL		 229 for (tty = tty_list; tty; tty = tty->next)
230 {
0b0d3e0b
KL		 231 if (tty->input) /* Is the device suspended? */
232 {
12e610e8
DN		 233 emacs_get_tty (fileno (tty->input), &buf);
234 emacs_set_tty (fileno (tty->input), &buf, 0);
0b0d3e0b 235 }
9628b887
KL		 236 }
237 }
207bdbdb 238#endif /* not MSDOS */
fe03522b 239#endif /* not WINDOWSNT */
86a5659e
JB		 240}
241
16c290d8 242\f
86a5659e
JB		 243#ifdef SIGTSTP
244
64e971c3 245/* Arrange for character C to be read as the next input from
16c290d8
KL		 246 the terminal.
247 XXX What if we have multiple ttys?
248*/
64e971c3 249
dfcf069d 250void
0c2338d8 251stuff_char (char c)
86a5659e 252{
428a555e 253 if (! FRAME_TERMCAP_P (SELECTED_FRAME ()))
23dab951
RS		 254 return;
255
86a5659e
JB		 256/* Should perhaps error if in batch mode */
257#ifdef TIOCSTI
0b0d3e0b 258 ioctl (fileno (CURTTY()->input), TIOCSTI, &c);
86a5659e 259#else /* no TIOCSTI */
71f06467 260 error ("Cannot stuff terminal input characters in this version of Unix");
86a5659e
JB		 261#endif /* no TIOCSTI */
262}
263
264#endif /* SIGTSTP */
64e971c3 265\f
08633194 266void
16c290d8 267init_baud_rate (int fd)
86a5659e 268{
4c620157 269 int emacs_ospeed;
67342916 270
86a5659e 271 if (noninteractive)
5bdd7bdd 272 emacs_ospeed = 0;
86a5659e
JB		 273 else
274 {
fe03522b 275#ifdef DOS_NT
5bdd7bdd 276 emacs_ospeed = 15;
fe03522b 277#else /* not DOS_NT */
e04a4e0d 278 struct termios sg;
91bac16a 279
71f06467 280 sg.c_cflag = B9600;
16c290d8 281 tcgetattr (fd, &sg);
5bdd7bdd 282 emacs_ospeed = cfgetospeed (&sg);
fe03522b 283#endif /* not DOS_NT */
86a5659e 284 }
177c0ea7 285
5bdd7bdd
GM		 286 baud_rate = (emacs_ospeed < sizeof baud_convert / sizeof baud_convert[0]
287 ? baud_convert[emacs_ospeed] : 9600);
86a5659e
JB		 288 if (baud_rate == 0)
289 baud_rate = 1200;
290}
291
16c290d8 292\f
86a5659e
JB		 293
294int wait_debugging; /* Set nonzero to make following function work under dbx
fe03522b 295 (at least for bsd). */
86a5659e 296
77defa9a 297#ifndef MSDOS
86a5659e
JB		 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
08633194 301void
971de7fb 302wait_for_termination (int pid)
86a5659e
JB		 303{
304 while (1)
305 {
f2a77c3a 306#if defined (BSD_SYSTEM) || defined (HPUX)
4c8975ad
RS		 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))
fe03522b 316 {
4c8975ad
RS		 317 sigsetmask (SIGEMPTYMASK);
318 kill (getpid (), SIGCHLD);
319 break;
320 }
321 if (wait_debugging)
322 sleep (1);
323 else
324 sigpause (SIGEMPTYMASK);
2a633456 325#else /* not BSD_SYSTEM, and not HPUX version >= 6 */
d6dae14b
EZ		 326#ifdef WINDOWSNT
327 wait (0);
328 break;
329#else /* not WINDOWSNT */
9ab714c7 330 sigblock (sigmask (SIGCHLD));
59957f85
GM		 331 errno = 0;
332 if (kill (pid, 0) == -1 && errno == ESRCH)
9ab714c7
RS		 333 {
334 sigunblock (sigmask (SIGCHLD));
335 break;
336 }
ac3ac859 337
0fdcb867 338 sigsuspend (&empty_mask);
d6dae14b 339#endif /* not WINDOWSNT */
2a633456 340#endif /* not BSD_SYSTEM, and not HPUX version >= 6 */
86a5659e
JB		 341 }
342}
343
86a5659e
JB		 344/*
345 * flush any pending output
346 * (may flush input as well; it does not matter the way we use it)
347 */
177c0ea7 348
08633194 349void
971de7fb 350flush_pending_output (int channel)
86a5659e 351{
9de940b5 352 /* FIXME: maybe this function should be removed */
86a5659e 353}
64e971c3 354\f
86a5659e
JB		 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
08633194 360void
971de7fb 361child_setup_tty (int out)
86a5659e 362{
77defa9a 363#ifndef WINDOWSNT
91bac16a
JB		 364 struct emacs_tty s;
365
12e610e8 366 emacs_get_tty (out, &s);
91bac16a
JB		 367 s.main.c_oflag |= OPOST; /* Enable output postprocessing */
368 s.main.c_oflag &= ~ONLCR; /* Disable map of NL to CR-NL on output */
9d4e5eea 369#ifdef NLDLY
07cfc4e7
GM		 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
91bac16a
JB		 373 s.main.c_oflag &= ~(NLDLY|CRDLY|TABDLY|BSDLY|VTDLY|FFDLY);
374 /* No output delays */
07cfc4e7
GM		 375#else
376 s.main.c_oflag &= ~(NLDLY|CRDLY|TABDLY|BSDLY|VTDLY);
377 /* No output delays */
378#endif
9d4e5eea 379#endif
91bac16a
JB		 380 s.main.c_lflag &= ~ECHO; /* Disable echo */
381 s.main.c_lflag |= ISIG; /* Enable signals */
9d4e5eea
RS		 382#ifdef IUCLC
383 s.main.c_iflag &= ~IUCLC; /* Disable downcasing on input. */
384#endif
f7097b2a
RS		 385#ifdef ISTRIP
386 s.main.c_iflag &= ~ISTRIP; /* don't strip 8th bit on input */
387#endif
23e4c8be 388#ifdef OLCUC
9d4e5eea
RS		 389 s.main.c_oflag &= ~OLCUC; /* Disable upcasing on output. */
390#endif
f7097b2a 391 s.main.c_oflag &= ~TAB3; /* Disable tab expansion */
1bf96fb5 392 s.main.c_cflag = (s.main.c_cflag & ~CSIZE) | CS8; /* Don't strip 8th bit */
441f6399
RS		 393 s.main.c_cc[VERASE] = CDISABLE; /* disable erase processing */
394 s.main.c_cc[VKILL] = CDISABLE; /* disable kill processing */
91bac16a 395
86a5659e 396#ifdef HPUX
91bac16a 397 s.main.c_cflag = (s.main.c_cflag & ~CBAUD) | B9600; /* baud rate sanity */
86a5659e 398#endif /* HPUX */
91bac16a 399
dfe598b5
RS		 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. */
fa51fa32 403 if (s.main.c_cc[VQUIT] == CDISABLE)
dfe598b5 404 s.main.c_cc[VQUIT] = '\\'&037; /* Control-\ */
fa51fa32 405 if (s.main.c_cc[VINTR] == CDISABLE)
dfe598b5
RS		 406 s.main.c_cc[VINTR] = 'C'&037; /* Control-C */
407#endif /* not SIGNALS_VIA_CHARACTERS */
408
86a5659e 409#ifdef AIX
86a5659e
JB		 410 /* Also, PTY overloads NUL and BREAK.
411 don't ignore break, but don't signal either, so it looks like NUL. */
91bac16a
JB		 412 s.main.c_iflag &= ~IGNBRK;
413 s.main.c_iflag &= ~BRKINT;
dfe598b5
RS		 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. */
91bac16a 417 s.main.c_cflag = (s.main.c_cflag & ~CBAUD) | B9600; /* baud rate sanity */
86a5659e
JB		 418#endif /* AIX */
419
aaa0a19a
SM		 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
2b0a91e7
SM		 423 subprocess has disabled ICANON and ends up seeing those spurious
424 extra EOFs. So we don't send EOFs any more in
aaa0a19a
SM		 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? */
9a747ba6
JD		 436
437 s.main.c_lflag |= ICANON; /* Enable line editing and eof processing */
438 s.main.c_cc[VEOF] = 'D'&037; /* Control-D */
3d15fe78 439#if 0 /* These settings only apply to non-ICANON mode. */
2b0a91e7
SM		 440 s.main.c_cc[VMIN] = 1;
441 s.main.c_cc[VTIME] = 0;
aaa0a19a 442#endif
2b0a91e7 443
12e610e8 444 emacs_set_tty (out, &s, 0);
77defa9a 445#endif /* not WINDOWSNT */
86a5659e 446}
57507bf8 447#endif /* not MSDOS */
86a5659e 448
64e971c3 449\f
86a5659e
JB		 450/* Record a signal code and the handler for it. */
451struct save_signal
452{
453 int code;
9af30bdf 454 void (*handler) (int);
86a5659e
JB		 455};
456
f57e2426
J		 457static void save_signal_handlers (struct save_signal *);
458static void restore_signal_handlers (struct save_signal *);
35a05cca 459
86a5659e
JB		 460/* Suspend the Emacs process; give terminal to its superior. */
461
08633194 462void
971de7fb 463sys_suspend (void)
86a5659e 464{
c4ea52a6 465#if defined (SIGTSTP) && !defined (MSDOS)
86a5659e 466
5a570e37 467 {
e89a2cd5 468 int pgrp = EMACS_GETPGRP (0);
5a570e37
JB		 469 EMACS_KILLPG (pgrp, SIGTSTP);
470 }
86a5659e
JB		 471
472#else /* No SIGTSTP */
86a5659e
JB		 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. */
a0932daa
KH		 476 sys_subshell ();
477
a0932daa 478#endif /* no SIGTSTP */
a0932daa
KH		 479}
480
481/* Fork a subshell. */
482
08633194 483void
971de7fb 484sys_subshell (void)
a0932daa 485{
ad00c243 486#ifdef DOS_NT /* Demacs 1.1.2 91/10/20 Manabu Higashida */
a0932daa
KH		 487 int st;
488 char oldwd[MAXPATHLEN+1]; /* Fixed length is safe on MSDOS. */
489#endif
efa04277 490 int pid;
86a5659e 491 struct save_signal saved_handlers[5];
efa04277 492 Lisp_Object dir;
5e41f65d 493 unsigned char *volatile str_volatile = 0;
7e9123a2 494 unsigned char *str;
efa04277 495 int len;
86a5659e
JB		 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
efa04277
RS		 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");
0e7e7a58 511 if (NILP (Fboundp (dir)))
efa04277
RS		 512 goto xyzzy;
513 dir = Fsymbol_value (dir);
914e81a2 514 if (!STRINGP (dir))
efa04277
RS		 515 goto xyzzy;
516
517 dir = expand_and_dir_to_file (Funhandled_file_name_directory (dir), Qnil);
5e41f65d 518 str_volatile = str = (unsigned char *) alloca (SCHARS (dir) + 2);
d5db4077 519 len = SCHARS (dir);
72af86bd 520 memcpy (str, SDATA (dir), len);
efa04277
RS		 521 if (str[len - 1] != '/') str[len++] = '/';
522 str[len] = 0;
523 xyzzy:
524
ad00c243 525#ifdef DOS_NT
7964ba9e 526 pid = 0;
718ca3cf
RS		 527 save_signal_handlers (saved_handlers);
528 synch_process_alive = 1;
177c0ea7 529#else
efa04277 530 pid = vfork ();
86a5659e
JB		 531 if (pid == -1)
532 error ("Can't spawn subshell");
7964ba9e
RS		 533#endif
534
86a5659e
JB		 535 if (pid == 0)
536 {
8ea90aa3 537 const char *sh = 0;
86a5659e 538
ad00c243 539#ifdef DOS_NT /* MW, Aug 1993 */
207bdbdb 540 getwd (oldwd);
7964ba9e
RS		 541 if (sh == 0)
542 sh = (char *) egetenv ("SUSPEND"); /* KFS, 1994-12-14 */
207bdbdb 543#endif
7964ba9e
RS		 544 if (sh == 0)
545 sh = (char *) egetenv ("SHELL");
86a5659e
JB		 546 if (sh == 0)
547 sh = "sh";
207bdbdb 548
86a5659e 549 /* Use our buffer's default directory for the subshell. */
5e41f65d 550 str = str_volatile;
32299e33
PE		 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 }
efa04277 558
86a5659e 559 close_process_descs (); /* Close Emacs's pipes/ptys */
1593c2fe 560
fe03522b 561#ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */
c0917202 562 {
48178f9a
EZ		 563 char *epwd = getenv ("PWD");
564 char old_pwd[MAXPATHLEN+1+4];
c0917202
EZ		 565
566 /* If PWD is set, pass it with corrected value. */
48178f9a 567 if (epwd)
c0917202 568 {
48178f9a 569 strcpy (old_pwd, epwd);
c0917202
EZ		 570 if (str[len - 1] == '/')
571 str[len - 1] = '\0';
572 setenv ("PWD", str, 1);
573 }
574 st = system (sh);
32299e33 575 chdir (oldwd); /* FIXME: Do the right thing on chdir failure. */
48178f9a 576 if (epwd)
c0917202
EZ		 577 putenv (old_pwd); /* restore previous value */
578 }
207bdbdb 579#else /* not MSDOS */
fe03522b 580#ifdef WINDOWSNT
fe03522b
RS		 581 /* Waits for process completion */
582 pid = _spawnlp (_P_WAIT, sh, sh, NULL);
32299e33 583 chdir (oldwd); /* FIXME: Do the right thing on chdir failure. */
fe03522b
RS		 584 if (pid == -1)
585 write (1, "Can't execute subshell", 22);
fe03522b 586#else /* not WINDOWSNT */
e120ea40 587 execlp (sh, sh, (char *) 0);
67342916 588 ignore_value (write (1, "Can't execute subshell", 22));
86a5659e 589 _exit (1);
fe03522b 590#endif /* not WINDOWSNT */
207bdbdb 591#endif /* not MSDOS */
86a5659e
JB		 592 }
593
718ca3cf 594 /* Do this now if we did not do it before. */
ed68db4d 595#ifndef MSDOS
86a5659e 596 save_signal_handlers (saved_handlers);
ffafc793 597 synch_process_alive = 1;
718ca3cf
RS		 598#endif
599
ad00c243 600#ifndef DOS_NT
86a5659e 601 wait_for_termination (pid);
7964ba9e 602#endif
86a5659e 603 restore_signal_handlers (saved_handlers);
718ca3cf 604 synch_process_alive = 0;
86a5659e
JB		 605}
606
35a05cca 607static void
971de7fb 608save_signal_handlers (struct save_signal *saved_handlers)
86a5659e
JB		 609{
610 while (saved_handlers->code)
611 {
508b171c 612 saved_handlers->handler
9af30bdf 613 = (void (*) (int)) signal (saved_handlers->code, SIG_IGN);
86a5659e
JB		 614 saved_handlers++;
615 }
616}
617
35a05cca 618static void
971de7fb 619restore_signal_handlers (struct save_signal *saved_handlers)
86a5659e
JB		 620{
621 while (saved_handlers->code)
622 {
623 signal (saved_handlers->code, saved_handlers->handler);
624 saved_handlers++;
625 }
626}
627\f
4d553a13
KL		 628#ifndef SIGIO
629/* If SIGIO is broken, don't do anything. */
630void
631init_sigio (int fd)
632{
633}
634
604efe86 635static void
4d553a13
KL		 636reset_sigio (int fd)
637{
638}
639
640void
641request_sigio (void)
642{
643}
644
645void
646unrequest_sigio (void)
647{
648}
649
650#else
86a5659e
JB		 651#ifdef F_SETFL
652
819b8f00 653int old_fcntl_flags[MAXDESC];
86a5659e 654
08633194 655void
971de7fb 656init_sigio (int fd)
86a5659e
JB		 657{
658#ifdef FASYNC
819b8f00
KL		 659 old_fcntl_flags[fd] = fcntl (fd, F_GETFL, 0) & ~FASYNC;
660 fcntl (fd, F_SETFL, old_fcntl_flags[fd] | FASYNC);
86a5659e 661#endif
23dab951 662 interrupts_deferred = 0;
86a5659e
JB		 663}
664
604efe86 665static void
971de7fb 666reset_sigio (int fd)
86a5659e 667{
4d553a13 668#ifdef FASYNC
819b8f00 669 fcntl (fd, F_SETFL, old_fcntl_flags[fd]);
4d553a13 670#endif
86a5659e
JB		 671}
672
eb8c3be9 673#ifdef FASYNC /* F_SETFL does not imply existence of FASYNC */
428a555e 674/* XXX Uhm, FASYNC is not used anymore here. */
6d8cf830 675/* XXX Yeah, but you need it for SIGIO, don't you? */
86a5659e 676
08633194 677void
971de7fb 678request_sigio (void)
86a5659e 679{
6bbba5a6 680 if (noninteractive)
23dab951
RS		 681 return;
682
86a5659e 683#ifdef SIGWINCH
e065a56e 684 sigunblock (sigmask (SIGWINCH));
86a5659e 685#endif
0a125897 686 sigunblock (sigmask (SIGIO));
86a5659e
JB		 687
688 interrupts_deferred = 0;
689}
690
08633194 691void
0a125897 692unrequest_sigio (void)
cf84bb53 693{
6bbba5a6
KL		 694 if (noninteractive)
695 return;
696
697#if 0 /* XXX What's wrong with blocking SIGIO under X? */
698 if (x_display_list)
23dab951 699 return;
428a555e 700#endif
6bbba5a6 701
86a5659e 702#ifdef SIGWINCH
e065a56e 703 sigblock (sigmask (SIGWINCH));
86a5659e 704#endif
0a125897 705 sigblock (sigmask (SIGIO));
86a5659e
JB		 706 interrupts_deferred = 1;
707}
708
709#else /* no FASYNC */
feb67dfe 710#ifndef MSDOS
25ab68af 711
08633194 712void
cf84bb53 713request_sigio (void)
86a5659e 714{
6e5b2385 715 if (noninteractive || read_socket_hook)
23dab951
RS		 716 return;
717
86a5659e
JB		 718 croak ("request_sigio");
719}
177c0ea7 720
08633194 721void
cf84bb53 722unrequest_sigio (void)
86a5659e 723{
6e5b2385 724 if (noninteractive || read_socket_hook)
23dab951
RS		 725 return;
726
86a5659e
JB		 727 croak ("unrequest_sigio");
728}
feb67dfe
EZ		 729
730#endif /* MSDOS */
86a5659e
JB		 731#endif /* FASYNC */
732#endif /* F_SETFL */
4d553a13 733#endif /* SIGIO */
9ae8f997 734
9ae8f997 735\f
68936329
JB		 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
971de7fb 742emacs_get_tty (int fd, struct emacs_tty *settings)
68936329
JB		 743{
744 /* Retrieve the primary parameters - baud rate, character size, etcetera. */
a7ebc409 745#ifndef DOS_NT
68936329 746 /* We have those nifty POSIX tcmumbleattr functions. */
72af86bd 747 memset (&settings->main, 0, sizeof (settings->main));
68936329
JB		 748 if (tcgetattr (fd, &settings->main) < 0)
749 return -1;
68936329
JB		 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
394049ec 758 *SETTINGS. If FLUSHP is non-zero, we discard input.
68936329 759 Return 0 if all went well, and -1 if anything failed. */
394049ec 760
68936329 761int
971de7fb 762emacs_set_tty (int fd, struct emacs_tty *settings, int flushp)
68936329
JB		 763{
764 /* Set the primary parameters - baud rate, character size, etcetera. */
a7ebc409 765#ifndef DOS_NT
e6cc3307 766 int i;
68936329
JB		 767 /* We have those nifty POSIX tcmumbleattr functions.
768 William J. Smith <wjs@wiis.wang.com> writes:
c4ea52a6 769 "POSIX 1003.1 defines tcsetattr to return success if it was
68936329
JB		 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." */
eb8c3be9 774 /* This make sure that we don't loop indefinitely in here. */
e6cc3307 775 for (i = 0 ; i < 10 ; i++)
394049ec 776 if (tcsetattr (fd, flushp ? TCSAFLUSH : TCSADRAIN, &settings->main) < 0)
68936329
JB		 777 {
778 if (errno == EINTR)
779 continue;
780 else
781 return -1;
782 }
783 else
784 {
785 struct termios new;
786
72af86bd 787 memset (&new, 0, sizeof (new));
68936329
JB		 788 /* Get the current settings, and see if they're what we asked for. */
789 tcgetattr (fd, &new);
e6cc3307
RS		 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
c4ea52a6 798 && memcmp (new.c_cc, settings->main.c_cc, NCCS) == 0)
68936329 799 break;
e6cc3307
RS		 800 else
801 continue;
68936329 802 }
68936329 803#endif
177c0ea7 804
68936329
JB		 805 /* We have survived the tempest. */
806 return 0;
807}
808
809\f
86a5659e
JB		 810
811#ifdef F_SETOWN
819b8f00 812int old_fcntl_owner[MAXDESC];
86a5659e
JB		 813#endif /* F_SETOWN */
814
86a5659e
JB		 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
9d9a7716 819#if defined (USG)
86a5659e
JB		 820unsigned char _sobuf[BUFSIZ+8];
821#else
822char _sobuf[BUFSIZ];
823#endif
177c0ea7 824
da8e1115
KL		 825/* Initialize the terminal mode on all tty devices that are currently
826 open. */
827
08633194 828void
28d440ab
KL		 829init_all_sys_modes (void)
830{
28d7d09f 831 struct tty_display_info *tty;
16c290d8 832 for (tty = tty_list; tty; tty = tty->next)
28d440ab 833 init_sys_modes (tty);
28d440ab
KL		 834}
835
da8e1115
KL		 836/* Initialize the terminal mode on the given tty device. */
837
28d440ab 838void
971de7fb 839init_sys_modes (struct tty_display_info *tty_out)
86a5659e 840{
91bac16a
JB		 841 struct emacs_tty tty;
842
4ec5cb58
RS		 843 Vtty_erase_char = Qnil;
844
86a5659e
JB		 845 if (noninteractive)
846 return;
847
0b0d3e0b
KL		 848 if (!tty_out->output)
849 return; /* The tty is suspended. */
cf84bb53 850
2246281f
KL		 851 if (! tty_out->old_tty)
852 tty_out->old_tty = (struct emacs_tty *) xmalloc (sizeof (struct emacs_tty));
cf84bb53 853
12e610e8 854 emacs_get_tty (fileno (tty_out->input), tty_out->old_tty);
23dab951 855
2246281f 856 tty = *tty_out->old_tty;
86a5659e 857
a7ebc409 858#if !defined (DOS_NT)
2246281f 859 XSETINT (Vtty_erase_char, tty.main.c_cc[VERASE]);
4ec5cb58 860
2246281f
KL		 861 tty.main.c_iflag |= (IGNBRK); /* Ignore break condition */
862 tty.main.c_iflag &= ~ICRNL; /* Disable map of CR to NL on input */
7f371164
RS		 863#ifdef INLCR /* I'm just being cautious,
864 since I can't check how widespread INLCR is--rms. */
2246281f 865 tty.main.c_iflag &= ~INLCR; /* Disable map of NL to CR on input */
7f371164 866#endif
86a5659e 867#ifdef ISTRIP
2246281f 868 tty.main.c_iflag &= ~ISTRIP; /* don't strip 8th bit on input */
86a5659e 869#endif
2246281f
KL		 870 tty.main.c_lflag &= ~ECHO; /* Disable echo */
871 tty.main.c_lflag &= ~ICANON; /* Disable erase/kill processing */
e2b40c23 872#ifdef IEXTEN
2246281f 873 tty.main.c_lflag &= ~IEXTEN; /* Disable other editing characters. */
e2b40c23 874#endif
2246281f
KL		 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 */
86a5659e 879#ifdef IXANY
2246281f 880 tty.main.c_iflag &= ~IXANY;
86a5659e 881#endif /* IXANY */
2246281f
KL		 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 */
86a5659e 888#ifdef CS8
2246281f
KL		 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 }
86a5659e 894#endif
2246281f
KL		 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.
cf84bb53 911
2246281f
KL		 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. */
86a5659e 925#ifdef VSWTCH
2246281f 926 tty.main.c_cc[VSWTCH] = CDISABLE; /* Turn off shell layering use
91bac16a 927 of C-z */
86a5659e 928#endif /* VSWTCH */
cf84bb53 929
86a5659e 930#ifdef VSUSP
a7ebc409 931 tty.main.c_cc[VSUSP] = CDISABLE; /* Turn off handling of C-z. */
86a5659e
JB		 932#endif /* VSUSP */
933#ifdef V_DSUSP
a7ebc409 934 tty.main.c_cc[V_DSUSP] = CDISABLE; /* Turn off handling of C-y. */
86a5659e 935#endif /* V_DSUSP */
e2b40c23 936#ifdef VDSUSP /* Some systems have VDSUSP, some have V_DSUSP. */
2246281f 937 tty.main.c_cc[VDSUSP] = CDISABLE;
e2b40c23 938#endif /* VDSUSP */
92c995de 939#ifdef VLNEXT
2246281f 940 tty.main.c_cc[VLNEXT] = CDISABLE;
92c995de
RS		 941#endif /* VLNEXT */
942#ifdef VREPRINT
2246281f 943 tty.main.c_cc[VREPRINT] = CDISABLE;
92c995de
RS		 944#endif /* VREPRINT */
945#ifdef VWERASE
2246281f 946 tty.main.c_cc[VWERASE] = CDISABLE;
92c995de
RS		 947#endif /* VWERASE */
948#ifdef VDISCARD
2246281f 949 tty.main.c_cc[VDISCARD] = CDISABLE;
92c995de 950#endif /* VDISCARD */
c179a6d1 951
2246281f
KL		 952 if (tty_out->flow_control)
953 {
421dd92f 954#ifdef VSTART
2246281f 955 tty.main.c_cc[VSTART] = '\021';
421dd92f
RS		 956#endif /* VSTART */
957#ifdef VSTOP
2246281f 958 tty.main.c_cc[VSTOP] = '\023';
421dd92f 959#endif /* VSTOP */
2246281f
KL		 960 }
961 else
962 {
c179a6d1 963#ifdef VSTART
2246281f 964 tty.main.c_cc[VSTART] = CDISABLE;
c179a6d1
RS		 965#endif /* VSTART */
966#ifdef VSTOP
2246281f 967 tty.main.c_cc[VSTOP] = CDISABLE;
c179a6d1 968#endif /* VSTOP */
2246281f 969 }
c179a6d1 970
86a5659e 971#ifdef AIX
f5272227
KL		 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;
2246281f
KL		 976 if (tty_out->flow_control)
977 {
ac567c95 978#ifdef VSTART
2246281f 979 tty.main.c_cc[VSTART] = '\021';
ac567c95
RS		 980#endif /* VSTART */
981#ifdef VSTOP
2246281f 982 tty.main.c_cc[VSTOP] = '\023';
ac567c95 983#endif /* VSTOP */
2246281f
KL		 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;
86a5659e 991#endif
fe03522b 992#endif /* not DOS_NT */
cf84bb53 993
207bdbdb 994#ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida, MW Aug 1993 */
2246281f
KL		 995 if (!tty_out->term_initted)
996 internal_terminal_init ();
4e389d32 997 dos_ttraw (tty_out);
207bdbdb 998#endif
91bac16a 999
12e610e8 1000 emacs_set_tty (fileno (tty_out->input), &tty, 0);
86a5659e 1001
2246281f
KL		 1002 /* This code added to insure that, if flow-control is not to be used,
1003 we have an unlocked terminal at the start. */
91bac16a 1004
86a5659e 1005#ifdef TCXONC
0b0d3e0b 1006 if (!tty_out->flow_control) ioctl (fileno (tty_out->input), TCXONC, 1);
86a5659e 1007#endif
86a5659e 1008#ifdef TIOCSTART
0b0d3e0b 1009 if (!tty_out->flow_control) ioctl (fileno (tty_out->input), TIOCSTART, 0);
86a5659e 1010#endif
86a5659e 1011
a7ebc409 1012#if !defined (DOS_NT)
51417996 1013#ifdef TCOON
0b0d3e0b 1014 if (!tty_out->flow_control) tcflow (fileno (tty_out->input), TCOON);
d228f207 1015#endif
51417996 1016#endif
d228f207 1017
86a5659e 1018#ifdef F_SETFL
eb8c3be9 1019#ifdef F_GETOWN /* F_SETFL does not imply existence of F_GETOWN */
2246281f 1020 if (interrupt_input)
86a5659e 1021 {
0b0d3e0b
KL		 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));
7e5a23bd 1026#ifdef HAVE_GPM
75a8734b 1027 if (gpm_tty == tty_out)
3e748bcb 1028 {
75a8734b 1029 /* Arrange for mouse events to give us SIGIO signals. */
3e748bcb 1030 fcntl (gpm_fd, F_SETOWN, getpid ());
57669cf1 1031 fcntl (gpm_fd, F_SETFL, fcntl (gpm_fd, F_GETFL, 0) | O_NONBLOCK);
3e748bcb
NR		 1032 init_sigio (gpm_fd);
1033 }
7e5a23bd 1034#endif /* HAVE_GPM */
86a5659e
JB		 1035 }
1036#endif /* F_GETOWN */
1037#endif /* F_SETFL */
1038
86a5659e
JB		 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. */
0b0d3e0b 1043 setvbuf (tty_out->output, (char *) _sobuf, _IOFBF, sizeof _sobuf);
86a5659e 1044#else
0b0d3e0b 1045 setbuf (tty_out->output, (char *) _sobuf);
86a5659e 1046#endif
4d553a13 1047
69fb5031
JR		 1048 if (tty_out->terminal->set_terminal_modes_hook)
1049 tty_out->terminal->set_terminal_modes_hook (tty_out->terminal);
4b311aaf 1050
9628b887
KL		 1051 if (!tty_out->term_initted)
1052 {
1053 Lisp_Object tail, frame;
1054 FOR_EACH_FRAME (tail, frame)
1055 {
daf01701 1056 /* XXX This needs to be revised. */
9628b887
KL		 1057 if (FRAME_TERMCAP_P (XFRAME (frame))
1058 && FRAME_TTY (XFRAME (frame)) == tty_out)
1059 init_frame_faces (XFRAME (frame));
1060 }
1061 }
045942b2 1062
9628b887 1063 if (tty_out->term_initted && no_redraw_on_reenter)
86a5659e 1064 {
855a0da7
SM		 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. */
86a5659e
JB		 1067 }
1068 else
1069 {
9628b887 1070 Lisp_Object tail, frame;
0137dbf7 1071 frame_garbaged = 1;
9628b887
KL		 1072 FOR_EACH_FRAME (tail, frame)
1073 {
7ab98847
EZ		 1074 if ((FRAME_TERMCAP_P (XFRAME (frame))
1075 || FRAME_MSDOS_P (XFRAME (frame)))
9628b887
KL		 1076 && FRAME_TTY (XFRAME (frame)) == tty_out)
1077 FRAME_GARBAGED_P (XFRAME (frame)) = 1;
1078 }
86a5659e 1079 }
91bac16a 1080
9628b887 1081 tty_out->term_initted = 1;
86a5659e
JB		 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. */
177c0ea7 1086
dfcf069d 1087int
16c290d8 1088tabs_safe_p (int fd)
86a5659e 1089{
6548cf00 1090 struct emacs_tty etty;
91bac16a 1091
12e610e8
DN		 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 */
86a5659e 1102}
73d5358f 1103\f
86a5659e 1104/* Get terminal size from system.
73d5358f
RS		 1105 Store number of lines into *HEIGHTP and width into *WIDTHP.
1106 We store 0 if there's no valid information. */
86a5659e 1107
08633194 1108void
16c290d8 1109get_tty_size (int fd, int *widthp, int *heightp)
86a5659e 1110{
86a5659e 1111
86a5659e 1112#ifdef TIOCGWINSZ
91bac16a
JB		 1113
1114 /* BSD-style. */
86a5659e 1115 struct winsize size;
91bac16a 1116
16c290d8 1117 if (ioctl (fd, TIOCGWINSZ, &size) == -1)
91bac16a
JB		 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. */
177c0ea7 1129 struct ttysize size;
91bac16a 1130
16c290d8 1131 if (ioctl (fd, TIOCGSIZE, &size) == -1)
91bac16a
JB		 1132 *widthp = *heightp = 0;
1133 else
1134 {
1135 *widthp = size.ts_cols;
1136 *heightp = size.ts_lines;
1137 }
1138
207bdbdb
RS		 1139#else
1140#ifdef MSDOS
1141 *widthp = ScreenCols ();
1142 *heightp = ScreenRows ();
86a5659e
JB		 1143#else /* system doesn't know size */
1144 *widthp = 0;
1145 *heightp = 0;
207bdbdb 1146#endif
91bac16a
JB		 1147#endif /* not SunOS-style */
1148#endif /* not BSD-style */
86a5659e 1149}
91bac16a 1150
73d5358f
RS		 1151/* Set the logical window size associated with descriptor FD
1152 to HEIGHT and WIDTH. This is used mainly with ptys. */
1153
1154int
971de7fb 1155set_window_size (int fd, int height, int width)
73d5358f
RS		 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. */
177c0ea7 1173 struct ttysize size;
73d5358f
RS		 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
86a5659e 1187\f
da8e1115
KL		 1188
1189/* Prepare all terminal devices for exiting Emacs. */
1190
28d440ab
KL		 1191void
1192reset_all_sys_modes (void)
1193{
28d7d09f 1194 struct tty_display_info *tty;
16c290d8 1195 for (tty = tty_list; tty; tty = tty->next)
28d440ab 1196 reset_sys_modes (tty);
28d440ab
KL		 1197}
1198
0a125897 1199/* Prepare the terminal for closing it; move the cursor to the
0137dbf7 1200 bottom of the frame, turn off interrupt-driven I/O, etc. */
da8e1115 1201
08633194 1202void
971de7fb 1203reset_sys_modes (struct tty_display_info *tty_out)
86a5659e
JB		 1204{
1205 if (noninteractive)
1206 {
1207 fflush (stdout);
1208 return;
1209 }
9628b887 1210 if (!tty_out->term_initted)
86a5659e 1211 return;
da8e1115 1212
0b0d3e0b
KL		 1213 if (!tty_out->output)
1214 return; /* The tty is suspended. */
cf84bb53 1215
da8e1115
KL		 1216 /* Go to and clear the last line of the terminal. */
1217
0a125897 1218 cmgoto (tty_out, FrameRows (tty_out) - 1, 0);
cf84bb53 1219
da8e1115
KL		 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;
ed8dad6b 1228 tty_turn_off_insert (tty_out);
cf84bb53 1229
da8e1115 1230 for (i = curX (tty_out); i < FrameCols (tty_out) - 1; i++)
0b0d3e0b
KL		 1231 {
1232 fputc (' ', tty_out->output);
1233 }
da8e1115 1234 }
cf84bb53 1235
0a125897 1236 cmgoto (tty_out, FrameRows (tty_out) - 1, 0);
819b8f00 1237 fflush (tty_out->output);
cf84bb53 1238
69fb5031
JR		 1239 if (tty_out->terminal->reset_terminal_modes_hook)
1240 tty_out->terminal->reset_terminal_modes_hook (tty_out->terminal);
2f98e6e3 1241
2a633456 1242#ifdef BSD_SYSTEM
86a5659e 1243 /* Avoid possible loss of output when changing terminal modes. */
0b0d3e0b 1244 fsync (fileno (tty_out->output));
86a5659e 1245#endif
91bac16a 1246
86a5659e 1247#ifdef F_SETFL
eb8c3be9 1248#ifdef F_SETOWN /* F_SETFL does not imply existence of F_SETOWN */
86a5659e
JB		 1249 if (interrupt_input)
1250 {
0b0d3e0b
KL		 1251 reset_sigio (fileno (tty_out->input));
1252 fcntl (fileno (tty_out->input), F_SETOWN,
1253 old_fcntl_owner[fileno (tty_out->input)]);
86a5659e
JB		 1254 }
1255#endif /* F_SETOWN */
a6b00318 1256#ifdef O_NDELAY
0b0d3e0b
KL		 1257 fcntl (fileno (tty_out->input), F_SETFL,
1258 fcntl (fileno (tty_out->input), F_GETFL, 0) & ~O_NDELAY);
a6b00318 1259#endif
86a5659e 1260#endif /* F_SETFL */
91bac16a 1261
fca177d4 1262 if (tty_out->old_tty)
12e610e8 1263 while (emacs_set_tty (fileno (tty_out->input),
fca177d4 1264 tty_out->old_tty, 0) < 0 && errno == EINTR)
7e32a4fb 1265 ;
86a5659e 1266
207bdbdb
RS		 1267#ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */
1268 dos_ttcooked ();
1269#endif
1270
86a5659e
JB		 1271}
1272\f
1273#ifdef HAVE_PTYS
1274
1275/* Set up the proper status flags for use of a pty. */
1276
08633194 1277void
971de7fb 1278setup_pty (int fd)
86a5659e
JB		 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).
177c0ea7 1294
86a5659e
JB		 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.
177c0ea7 1300
86a5659e
JB		 1301 Since the latter lossage is more benign, we may as well
1302 lose that way. -- cph */
1303#ifdef FIONBIO
bdee2ef3 1304#if defined(UNIX98_PTYS)
86a5659e
JB		 1305 {
1306 int on = 1;
1307 ioctl (fd, FIONBIO, &on);
1308 }
1309#endif
1310#endif
86a5659e
JB		 1311}
1312#endif /* HAVE_PTYS */
1313\f
f8a80313
RS		 1314#ifdef HAVE_SOCKETS
1315#include <sys/socket.h>
1316#include <netdb.h>
1317#endif /* HAVE_SOCKETS */
f8a80313 1318
8581cd64
KH		 1319#ifdef TRY_AGAIN
1320#ifndef HAVE_H_ERRNO
1321extern int h_errno;
1322#endif
1323#endif /* TRY_AGAIN */
1324
c0c86835 1325void
971de7fb 1326init_system_name (void)
86a5659e 1327{
210b2b4f 1328#ifndef HAVE_GETHOSTNAME
c0c86835
KH		 1329 struct utsname uts;
1330 uname (&uts);
1331 Vsystem_name = build_string (uts.nodename);
67004ffb 1332#else /* HAVE_GETHOSTNAME */
cc6e7269 1333 unsigned int hostname_size = 256;
c0c86835
KH		 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 }
67004ffb 1352#ifdef HAVE_SOCKETS
c0c86835
KH		 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. */
67004ffb 1356#ifndef CANNOT_DUMP
c0c86835 1357 if (initialized)
67004ffb 1358#endif /* not CANNOT_DUMP */
8966b757 1359 if (! strchr (hostname, '.'))
960d894c 1360 {
960d894c 1361 int count;
3d66b985
JD		 1362#ifdef HAVE_GETADDRINFO
1363 struct addrinfo *res;
1364 struct addrinfo hints;
1365 int ret;
1366
cf84bb53 1367 memset (&hints, 0, sizeof (hints));
3d66b985
JD		 1368 hints.ai_socktype = SOCK_STREAM;
1369 hints.ai_flags = AI_CANONNAME;
1370
960d894c
KH		 1371 for (count = 0;; count++)
1372 {
3d66b985
JD		 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;
8966b757 1388 if (fqdn && strchr (fqdn, '.')
3d66b985
JD		 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
e24f1d55 1405#ifdef TRY_AGAIN
960d894c 1406 h_errno = 0;
e24f1d55 1407#endif
960d894c 1408 hp = gethostbyname (hostname);
efa04277 1409#ifdef TRY_AGAIN
960d894c
KH		 1410 if (! (hp == 0 && h_errno == TRY_AGAIN))
1411#endif
3d66b985 1412
960d894c 1413 break;
3d66b985 1414
960d894c
KH		 1415 if (count >= 5)
1416 break;
1417 Fsleep_for (make_number (1), Qnil);
1418 }
3d66b985 1419
960d894c
KH		 1420 if (hp)
1421 {
1422 char *fqdn = (char *) hp->h_name;
960d894c 1423
8966b757 1424 if (!strchr (fqdn, '.'))
960d894c
KH		 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;
923721f4 1429 while (*alias
8966b757 1430 && (!strchr (*alias, '.')
923721f4 1431 || !strcmp (*alias, "localhost.localdomain")))
960d894c
KH		 1432 alias++;
1433 if (*alias)
1434 fqdn = *alias;
1435 }
1436 hostname = fqdn;
960d894c 1437 }
3d66b985 1438#endif /* !HAVE_GETADDRINFO */
960d894c 1439 }
67004ffb 1440#endif /* HAVE_SOCKETS */
c0c86835 1441 Vsystem_name = build_string (hostname);
67004ffb 1442#endif /* HAVE_GETHOSTNAME */
c0c86835
KH		 1443 {
1444 unsigned char *p;
d5db4077 1445 for (p = SDATA (Vsystem_name); *p; p++)
c0c86835
KH		 1446 if (*p == ' ' || *p == '\t')
1447 *p = '-';
1448 }
67004ffb 1449}
86a5659e 1450\f
86a5659e
JB		 1451/* POSIX signals support - DJB */
1452/* Anyone with POSIX signals should have ANSI C declarations */
1453
c639b0e3 1454sigset_t empty_mask, full_mask;
86a5659e 1455
d6dae14b
EZ		 1456#ifndef WINDOWSNT
1457
86a5659e
JB		 1458signal_handler_t
1459sys_signal (int signal_number, signal_handler_t action)
1460{
c639b0e3 1461 struct sigaction new_action, old_action;
86a5659e 1462 sigemptyset (&new_action.sa_mask);
e5c99298 1463 new_action.sa_handler = action;
ef874e3d
AS		 1464 new_action.sa_flags = 0;
1465#if defined (SA_RESTART)
25ab68af 1466 /* Emacs mostly works better with restartable system services. If this
55fafcf0
RS		 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. */
275464e7
SM		 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. */
766f52ec
AS		 1475 /* Non-interactive keyboard input goes through stdio, where we always
1476 want restartable system calls. */
ef874e3d
AS		 1477# if defined (BROKEN_SA_RESTART) || defined(SYNC_INPUT)
1478 if (noninteractive)
1479# endif
1480 new_action.sa_flags = SA_RESTART;
25ab68af 1481#endif
d32b2f3c 1482 sigaction (signal_number, &new_action, &old_action);
e5c99298 1483 return (old_action.sa_handler);
86a5659e
JB		 1484}
1485
d6dae14b
EZ		 1486#endif /* WINDOWSNT */
1487
e065a56e
JB		 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
86a5659e
JB		 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
86a5659e 1530\f
b80263be 1531#if !defined HAVE_STRSIGNAL && !HAVE_DECL_SYS_SIGLIST
ca9c0567
PE		 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
971de7fb 1540init_signals (void)
ca9c0567 1541{
ca9c0567
PE		 1542 sigemptyset (&empty_mask);
1543 sigfillset (&full_mask);
ca9c0567 1544
b80263be 1545#if !defined HAVE_STRSIGNAL && !HAVE_DECL_SYS_SIGLIST
ca9c0567
PE		 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 }
b80263be 1705#endif /* !defined HAVE_STRSIGNAL && !defined HAVE_DECL_SYS_SIGLIST */
ca9c0567
PE		 1706}
1707\f
9927a7b1 1708#ifndef HAVE_RANDOM
4bb8c8b7
KH		 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)
2a633456 1738# endif /* !USG */
4bb8c8b7
KH		 1739# endif /* RAND_MAX != 2147483647 */
1740# endif /* RAND_MAX != 32767 */
1741# endif /* !HAVE_LRAND48 */
1742# endif /* !HAVE_RANDOM */
1743#endif /* !RAND_BITS */
2e46c7c6 1744
4bb8c8b7 1745void
971de7fb 1746seed_random (long int arg)
86a5659e 1747{
4bb8c8b7
KH		 1748#ifdef HAVE_RANDOM
1749 srandom ((unsigned int)arg);
f8b53a82 1750#else
4bb8c8b7 1751# ifdef HAVE_LRAND48
76425a49 1752 srand48 (arg);
4bb8c8b7
KH		 1753# else
1754 srand ((unsigned int)arg);
1755# endif
2e46c7c6 1756#endif
86a5659e
JB		 1757}
1758
4bb8c8b7
KH		 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
971de7fb 1764get_random (void)
4bb8c8b7
KH		 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}
7088d1ca
RM		 1781
1782#ifndef HAVE_STRERROR
fe03522b 1783#ifndef WINDOWSNT
7088d1ca
RM		 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}
fe03522b 1795#endif /* not WINDOWSNT */
7088d1ca 1796#endif /* ! HAVE_STRERROR */
86a5659e 1797\f
86a5659e 1798int
971de7fb 1799emacs_open (const char *path, int oflag, int mode)
86a5659e
JB		 1800{
1801 register int rtnval;
68c45bf0 1802
86a5659e 1803 while ((rtnval = open (path, oflag, mode)) == -1
275464e7
SM		 1804 && (errno == EINTR))
1805 QUIT;
86a5659e
JB		 1806 return (rtnval);
1807}
1808
dfcf069d 1809int
971de7fb 1810emacs_close (int fd)
86a5659e 1811{
fe111daf 1812 int did_retry = 0;
86a5659e
JB		 1813 register int rtnval;
1814
1815 while ((rtnval = close (fd)) == -1
fe111daf
KH		 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
86a5659e
JB		 1825 return rtnval;
1826}
1827
86a5659e 1828int
971de7fb 1829emacs_read (int fildes, char *buf, unsigned int nbyte)
86a5659e
JB		 1830{
1831 register int rtnval;
177c0ea7 1832
86a5659e 1833 while ((rtnval = read (fildes, buf, nbyte)) == -1
275464e7
SM		 1834 && (errno == EINTR))
1835 QUIT;
86a5659e
JB		 1836 return (rtnval);
1837}
1838
1839int
971de7fb 1840emacs_write (int fildes, const char *buf, unsigned int nbyte)
86a5659e 1841{
b95520f5 1842 register int rtnval, bytes_written;
86a5659e 1843
b95520f5
BF		 1844 bytes_written = 0;
1845
1846 while (nbyte > 0)
1847 {
1848 rtnval = write (fildes, buf, nbyte);
1849
1850 if (rtnval == -1)
1851 {
1852 if (errno == EINTR)
77220eeb
SM		 1853 {
1854#ifdef SYNC_INPUT
1855 /* I originally used `QUIT' but that might causes files to
1856 be truncated if you hit C-g in the middle of it. --Stef */
55310b94 1857 process_pending_signals ();
77220eeb
SM		 1858#endif
1859 continue;
1860 }
b95520f5 1861 else
aa670904 1862 return (bytes_written ? bytes_written : -1);
b95520f5
BF		 1863 }
1864
1865 buf += rtnval;
1866 nbyte -= rtnval;
1867 bytes_written += rtnval;
1868 }
1869 return (bytes_written);
86a5659e 1870}
d1fdcab7
PE		 1871
1872static struct allocator const emacs_norealloc_allocator =
1873 { xmalloc, NULL, xfree, memory_full };
1874
1875/* Get the symbolic link value of FILENAME. Return a pointer to a
1876 NUL-terminated string. If readlink fails, return NULL and set
1877 errno. If the value fits in INITIAL_BUF, return INITIAL_BUF.
1878 Otherwise, allocate memory and return a pointer to that memory. If
1879 memory allocation fails, diagnose and fail without returning. If
1880 successful, store the length of the symbolic link into *LINKLEN. */
1881char *
1882emacs_readlink (char const *filename, char initial_buf[READLINK_BUFSIZE])
1883{
1884 return careadlinkat (AT_FDCWD, filename, initial_buf, READLINK_BUFSIZE,
1885 &emacs_norealloc_allocator, careadlinkatcwd);
1886}
86a5659e
JB		 1887\f
1888#ifdef USG
1889/*
1890 * All of the following are for USG.
1891 *
1892 * On USG systems the system calls are INTERRUPTIBLE by signals
1893 * that the user program has elected to catch. Thus the system call
1894 * must be retried in these cases. To handle this without massive
1895 * changes in the source code, we remap the standard system call names
1896 * to names for our own functions in sysdep.c that do the system call
1897 * with retries. Actually, for portability reasons, it is good
1898 * programming practice, as this example shows, to limit all actual
eb8c3be9 1899 * system calls to a single occurrence in the source. Sure, this
86a5659e
JB		 1900 * adds an extra level of function call overhead but it is almost
1901 * always negligible. Fred Fish, Unisoft Systems Inc.
1902 */
1903
86a5659e
JB		 1904/*
1905 * Warning, this function may not duplicate 4.2 action properly
1906 * under error conditions.
1907 */
1908
15dfd3d9
PE		 1909#ifndef HAVE_GETWD
1910
86a5659e
JB		 1911#ifndef MAXPATHLEN
1912/* In 4.1, param.h fails to define this. */
1913#define MAXPATHLEN 1024
1914#endif
1915
86a5659e 1916char *
cf84bb53 1917getwd (char *pathname)
86a5659e
JB		 1918{
1919 char *npath, *spath;
cf84bb53 1920 extern char *getcwd (char *, size_t);
86a5659e 1921
9ac0d9e0 1922 BLOCK_INPUT; /* getcwd uses malloc */
86a5659e 1923 spath = npath = getcwd ((char *) 0, MAXPATHLEN);
f4a7e5bd 1924 if (spath == 0)
18b6bc73
GM		 1925 {
1926 UNBLOCK_INPUT;
1927 return spath;
1928 }
86a5659e
JB		 1929 /* On Altos 3068, getcwd can return @hostname/dir, so discard
1930 up to first slash. Should be harmless on other systems. */
1931 while (*npath && *npath != '/')
1932 npath++;
1933 strcpy (pathname, npath);
1934 free (spath); /* getcwd uses malloc */
9ac0d9e0 1935 UNBLOCK_INPUT;
86a5659e
JB		 1936 return pathname;
1937}
1938
1939#endif /* HAVE_GETWD */
1940
1941/*
1942 * Emulate rename using unlink/link. Note that this is
1943 * only partially correct. Also, doesn't enforce restriction
1944 * that files be of same type (regular->regular, dir->dir, etc).
1945 */
1946
4746118a
JB		 1947#ifndef HAVE_RENAME
1948
cf84bb53
JB		 1949int
1950rename (const char *from, const char *to)
86a5659e
JB		 1951{
1952 if (access (from, 0) == 0)
1953 {
1954 unlink (to);
1955 if (link (from, to) == 0)
1956 if (unlink (from) == 0)
1957 return (0);
1958 }
1959 return (-1);
1960}
1961
4746118a
JB		 1962#endif
1963
86a5659e 1964
69ab3201 1965#if defined(HPUX) && !defined(HAVE_PERROR)
86a5659e
JB		 1966
1967/* HPUX curses library references perror, but as far as we know
1968 it won't be called. Anyway this definition will do for now. */
1969
cf84bb53
JB		 1970void
1971perror (void)
86a5659e
JB		 1972{
1973}
69ab3201 1974#endif /* HPUX and not HAVE_PERROR */
86a5659e
JB		 1975
1976#ifndef HAVE_DUP2
1977
1978/*
1979 * Emulate BSD dup2. First close newd if it already exists.
1980 * Then, attempt to dup oldd. If not successful, call dup2 recursively
1981 * until we are, then close the unsuccessful ones.
1982 */
1983
cf84bb53
JB		 1984int
1985dup2 (int oldd, int newd)
86a5659e
JB		 1986{
1987 register int fd, ret;
177c0ea7 1988
68c45bf0 1989 emacs_close (newd);
86a5659e
JB		 1990
1991#ifdef F_DUPFD
68c45bf0 1992 return fcntl (oldd, F_DUPFD, newd);
86a5659e
JB		 1993#else
1994 fd = dup (old);
1995 if (fd == -1)
1996 return -1;
1997 if (fd == new)
1998 return new;
1999 ret = dup2 (old,new);
68c45bf0 2000 emacs_close (fd);
86a5659e
JB		 2001 return ret;
2002#endif
2003}
2004
2005#endif /* not HAVE_DUP2 */
2006
2007/*
2008 * Gettimeofday. Simulate as much as possible. Only accurate
2009 * to nearest second. Emacs doesn't use tzp so ignore it for now.
2010 * Only needed when subprocesses are defined.
2011 */
2012
86a5659e
JB		 2013#ifndef HAVE_GETTIMEOFDAY
2014#ifdef HAVE_TIMEVAL
177c0ea7 2015
dfcf069d 2016int
cf84bb53 2017gettimeofday (struct timeval *tp, struct timezone *tzp)
86a5659e 2018{
cf84bb53 2019 extern long time (long);
86a5659e 2020
177c0ea7 2021 tp->tv_sec = time ((long *)0);
86a5659e 2022 tp->tv_usec = 0;
4ca7594f
RS		 2023 if (tzp != 0)
2024 tzp->tz_minuteswest = -1;
dfcf069d 2025 return 0;
86a5659e 2026}
177c0ea7 2027
86a5659e 2028#endif
77defa9a 2029#endif /* !HAVE_GETTIMEOFDAY && HAVE_TIMEVAL */
177c0ea7 2030
86a5659e
JB		 2031/*
2032 * This function will go away as soon as all the stubs fixed. (fnf)
2033 */
2034
dfcf069d 2035void
971de7fb 2036croak (char *badfunc)
86a5659e
JB		 2037{
2038 printf ("%s not yet implemented\r\n", badfunc);
28d440ab 2039 reset_all_sys_modes ();
86a5659e
JB		 2040 exit (1);
2041}
2042
2043#endif /* USG */
2044\f
86a5659e
JB		 2045/* Directory routines for systems that don't have them. */
2046
1c97e857 2047#ifdef HAVE_DIRENT_H
86a5659e
JB		 2048
2049#include <dirent.h>
2050
9d9a7716 2051#if !defined (HAVE_CLOSEDIR)
cfdc57af 2052
86a5659e 2053int
9d9a7716 2054closedir (DIR *dirp /* stream from opendir */)
86a5659e 2055{
cfdc57af
RS		 2056 int rtnval;
2057
68c45bf0 2058 rtnval = emacs_close (dirp->dd_fd);
9ac0d9e0 2059 xfree ((char *) dirp);
cfdc57af
RS		 2060
2061 return rtnval;
86a5659e 2062}
9d9a7716 2063#endif /* not HAVE_CLOSEDIR */
1c97e857 2064#endif /* HAVE_DIRENT_H */
86a5659e 2065
23524fb9 2066\f
53ea491a 2067int
e5447b22 2068set_file_times (const char *filename, EMACS_TIME atime, EMACS_TIME mtime)
53ea491a
KH		 2069{
2070#ifdef HAVE_UTIMES
2071 struct timeval tv[2];
2072 tv[0] = atime;
2073 tv[1] = mtime;
8334eb21
RS		 2074 return utimes (filename, tv);
2075#else /* not HAVE_UTIMES */
53ea491a
KH		 2076 struct utimbuf utb;
2077 utb.actime = EMACS_SECS (atime);
2078 utb.modtime = EMACS_SECS (mtime);
8334eb21
RS		 2079 return utime (filename, &utb);
2080#endif /* not HAVE_UTIMES */
53ea491a
KH		 2081}
2082\f
23524fb9
JB		 2083/* mkdir and rmdir functions, for systems which don't have them. */
2084
2085#ifndef HAVE_MKDIR
2086/*
2087 * Written by Robert Rother, Mariah Corporation, August 1985.
2088 *
2089 * If you want it, it's yours. All I ask in return is that if you
2090 * figure out how to do this in a Bourne Shell script you send me
2091 * a copy.
2092 * sdcsvax!rmr or rmr@uscd
2093 *
2094 * Severely hacked over by John Gilmore to make a 4.2BSD compatible
db9cd97a 2095 * subroutine. 11Mar86; hoptoad!gnu
23524fb9
JB		 2096 *
2097 * Modified by rmtodd@uokmax 6-28-87 -- when making an already existing dir,
2098 * subroutine didn't return EEXIST. It does now.
2099 */
2100
2101/*
2102 * Make a directory.
2103 */
2104int
cf84bb53 2105mkdir (char *dpath, int dmode)
23524fb9 2106{
039f26a4 2107 int cpid, status, fd;
23524fb9
JB		 2108 struct stat statbuf;
2109
2110 if (stat (dpath, &statbuf) == 0)
2111 {
2112 errno = EEXIST; /* Stat worked, so it already exists */
2113 return -1;
2114 }
2115
2116 /* If stat fails for a reason other than non-existence, return error */
2117 if (errno != ENOENT)
2118 return -1;
2119
039f26a4 2120 synch_process_alive = 1;
23524fb9
JB		 2121 switch (cpid = fork ())
2122 {
2123
039f26a4 2124 case -1: /* Error in fork */
23524fb9
JB		 2125 return (-1); /* Errno is set already */
2126
2127 case 0: /* Child process */
2128 /*
2129 * Cheap hack to set mode of new directory. Since this
2130 * child process is going away anyway, we zap its umask.
2131 * FIXME, this won't suffice to set SUID, SGID, etc. on this
2132 * directory. Does anybody care?
2133 */
2134 status = umask (0); /* Get current umask */
2135 status = umask (status | (0777 & ~dmode)); /* Set for mkdir */
68c45bf0 2136 fd = emacs_open ("/dev/null", O_RDWR, 0);
039f26a4
RS		 2137 if (fd >= 0)
2138 {
2139 dup2 (fd, 0);
2140 dup2 (fd, 1);
2141 dup2 (fd, 2);
2142 }
23524fb9
JB		 2143 execl ("/bin/mkdir", "mkdir", dpath, (char *) 0);
2144 _exit (-1); /* Can't exec /bin/mkdir */
2145
2146 default: /* Parent process */
039f26a4 2147 wait_for_termination (cpid);
23524fb9
JB		 2148 }
2149
6b0824c9
JD		 2150 if (synch_process_death != 0 || synch_process_retcode != 0
2151 || synch_process_termsig != 0)
23524fb9
JB		 2152 {
2153 errno = EIO; /* We don't know why, but */
2154 return -1; /* /bin/mkdir failed */
2155 }
2156
2157 return 0;
2158}
2159#endif /* not HAVE_MKDIR */
2160
2161#ifndef HAVE_RMDIR
2162int
cf84bb53 2163rmdir (char *dpath)
23524fb9 2164{
039f26a4 2165 int cpid, status, fd;
23524fb9
JB		 2166 struct stat statbuf;
2167
2168 if (stat (dpath, &statbuf) != 0)
2169 {
2170 /* Stat just set errno. We don't have to */
2171 return -1;
2172 }
2173
039f26a4 2174 synch_process_alive = 1;
23524fb9
JB		 2175 switch (cpid = fork ())
2176 {
2177
039f26a4 2178 case -1: /* Error in fork */
23524fb9
JB		 2179 return (-1); /* Errno is set already */
2180
2181 case 0: /* Child process */
68c45bf0 2182 fd = emacs_open ("/dev/null", O_RDWR, 0);
039f26a4
RS		 2183 if (fd >= 0)
2184 {
2185 dup2 (fd, 0);
2186 dup2 (fd, 1);
2187 dup2 (fd, 2);
2188 }
f560db78
RS		 2189 execl ("/bin/rmdir", "rmdir", dpath, (char *) 0);
2190 _exit (-1); /* Can't exec /bin/rmdir */
2191
207bdbdb 2192 default: /* Parent process */
f560db78 2193 wait_for_termination (cpid);
23524fb9
JB		 2194 }
2195
6b0824c9
JD		 2196 if (synch_process_death != 0 || synch_process_retcode != 0
2197 || synch_process_termsig != 0)
23524fb9
JB		 2198 {
2199 errno = EIO; /* We don't know why, but */
f560db78 2200 return -1; /* /bin/rmdir failed */
23524fb9
JB		 2201 }
2202
2203 return 0;
2204}
2205#endif /* !HAVE_RMDIR */
2206
86a5659e 2207\f
72af86bd
AS		 2208#ifndef HAVE_MEMSET
2209void *
2210memset (void *b, int n, size_t length)
2211{
2212 unsigned char *p = b;
2213 while (length-- > 0)
2214 *p++ = n;
2215 return b;
2216}
2217#endif /* !HAVE_MEMSET */
2218
2219#ifndef HAVE_MEMCPY
2220void *
2221memcpy (void *b1, void *b2, size_t length)
2222{
2223 unsigned char *p1 = b1, *p2 = b2;
2224 while (length-- > 0)
2225 *p1++ = *p2++;
2226 return b1;
2227}
2228#endif /* !HAVE_MEMCPY */
2229
2230#ifndef HAVE_MEMMOVE
2231void *
2232memmove (void *b1, void *b2, size_t length)
2233{
2234 unsigned char *p1 = b1, *p2 = b2;
2235 if (p1 < p2 || p1 >= p2 + length)
2236 while (length-- > 0)
2237 *p1++ = *p2++;
2238 else
2239 {
2240 p1 += length;
2241 p2 += length;
2242 while (length-- > 0)
2243 *--p1 = *--p2;
2244 }
2245 return b1;
2246}
2247#endif /* !HAVE_MEMCPY */
2248
2249#ifndef HAVE_MEMCMP
2250int
2251memcmp (void *b1, void *b2, size_t length)
2252{
2253 unsigned char *p1 = b1, *p2 = b2;
2254 while (length-- > 0)
2255 if (*p1++ != *p2++)
2256 return p1[-1] < p2[-1] ? -1 : 1;
2257 return 0;
2258}
2259#endif /* !HAVE_MEMCMP */
2260\f
68c45bf0
PE		 2261#ifndef HAVE_STRSIGNAL
2262char *
cf84bb53 2263strsignal (int code)
68c45bf0
PE		 2264{
2265 char *signame = 0;
2266
2267 if (0 <= code && code < NSIG)
2268 {
68c45bf0
PE		 2269 /* Cast to suppress warning if the table has const char *. */
2270 signame = (char *) sys_siglist[code];
68c45bf0 2271 }
c4ea52a6 2272
68c45bf0
PE		 2273 return signame;
2274}
2275#endif /* HAVE_STRSIGNAL */
d888760c 2276\f
a7ebc409 2277#ifndef DOS_NT
d888760c 2278/* For make-serial-process */
cf84bb53
JB		 2279int
2280serial_open (char *port)
d888760c
GM		 2281{
2282 int fd = -1;
2283
2284 fd = emacs_open ((char*) port,
2285 O_RDWR
2286#ifdef O_NONBLOCK
2287 | O_NONBLOCK
2288#else
2289 | O_NDELAY
2290#endif
2291#ifdef O_NOCTTY
2292 | O_NOCTTY
2293#endif
2294 , 0);
2295 if (fd < 0)
2296 {
2297 error ("Could not open %s: %s",
2298 port, emacs_strerror (errno));
2299 }
2300#ifdef TIOCEXCL
2301 ioctl (fd, TIOCEXCL, (char *) 0);
2302#endif
2303
2304 return fd;
2305}
759d3f32
SM		 2306
2307#if !defined (HAVE_CFMAKERAW)
2308/* Workaround for targets which are missing cfmakeraw. */
2309/* Pasted from man page. */
cf84bb53
JB		 2310static void
2311cfmakeraw (struct termios *termios_p)
759d3f32
SM		 2312{
2313 termios_p->c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL|IXON);
2314 termios_p->c_oflag &= ~OPOST;
2315 termios_p->c_lflag &= ~(ECHO|ECHONL|ICANON|ISIG|IEXTEN);
2316 termios_p->c_cflag &= ~(CSIZE|PARENB);
2317 termios_p->c_cflag |= CS8;
2318}
2319#endif /* !defined (HAVE_CFMAKERAW */
2320
2321#if !defined (HAVE_CFSETSPEED)
2322/* Workaround for targets which are missing cfsetspeed. */
cf84bb53
JB		 2323static int
2324cfsetspeed (struct termios *termios_p, speed_t vitesse)
759d3f32
SM		 2325{
2326 return (cfsetispeed (termios_p, vitesse)
2327 + cfsetospeed (termios_p, vitesse));
2328}
2329#endif
2330
d888760c
GM		 2331/* For serial-process-configure */
2332void
2333serial_configure (struct Lisp_Process *p,
cf84bb53 2334 Lisp_Object contact)
d888760c
GM		 2335{
2336 Lisp_Object childp2 = Qnil;
2337 Lisp_Object tem = Qnil;
2338 struct termios attr;
2339 int err = -1;
2340 char summary[4] = "???"; /* This usually becomes "8N1". */
2341
2342 childp2 = Fcopy_sequence (p->childp);
2343
2344 /* Read port attributes and prepare default configuration. */
2345 err = tcgetattr (p->outfd, &attr);
2346 if (err != 0)
2347 error ("tcgetattr() failed: %s", emacs_strerror (errno));
2348 cfmakeraw (&attr);
2349#if defined (CLOCAL)
2350 attr.c_cflag |= CLOCAL;
2351#endif
2352#if defined (CREAD)
6d1921be 2353 attr.c_cflag |= CREAD;
d888760c
GM		 2354#endif
2355
2356 /* Configure speed. */
2357 if (!NILP (Fplist_member (contact, QCspeed)))
2358 tem = Fplist_get (contact, QCspeed);
2359 else
2360 tem = Fplist_get (p->childp, QCspeed);
2361 CHECK_NUMBER (tem);
2362 err = cfsetspeed (&attr, XINT (tem));
2363 if (err != 0)
2364 error ("cfsetspeed(%d) failed: %s", XINT (tem), emacs_strerror (errno));
2365 childp2 = Fplist_put (childp2, QCspeed, tem);
2366
2367 /* Configure bytesize. */
2368 if (!NILP (Fplist_member (contact, QCbytesize)))
2369 tem = Fplist_get (contact, QCbytesize);
2370 else
2371 tem = Fplist_get (p->childp, QCbytesize);
2372 if (NILP (tem))
2373 tem = make_number (8);
2374 CHECK_NUMBER (tem);
2375 if (XINT (tem) != 7 && XINT (tem) != 8)
2376 error (":bytesize must be nil (8), 7, or 8");
cf84bb53 2377 summary[0] = XINT (tem) + '0';
d888760c
GM		 2378#if defined (CSIZE) && defined (CS7) && defined (CS8)
2379 attr.c_cflag &= ~CSIZE;
2380 attr.c_cflag |= ((XINT (tem) == 7) ? CS7 : CS8);
2381#else
16bad4dd 2382 /* Don't error on bytesize 8, which should be set by cfmakeraw. */
d888760c
GM		 2383 if (XINT (tem) != 8)
2384 error ("Bytesize cannot be changed");
2385#endif
2386 childp2 = Fplist_put (childp2, QCbytesize, tem);
2387
2388 /* Configure parity. */
2389 if (!NILP (Fplist_member (contact, QCparity)))
2390 tem = Fplist_get (contact, QCparity);
2391 else
2392 tem = Fplist_get (p->childp, QCparity);
2393 if (!NILP (tem) && !EQ (tem, Qeven) && !EQ (tem, Qodd))
2394 error (":parity must be nil (no parity), `even', or `odd'");
2395#if defined (PARENB) && defined (PARODD) && defined (IGNPAR) && defined (INPCK)
2396 attr.c_cflag &= ~(PARENB | PARODD);
2397 attr.c_iflag &= ~(IGNPAR | INPCK);
2398 if (NILP (tem))
2399 {
2400 summary[1] = 'N';
2401 }
2402 else if (EQ (tem, Qeven))
2403 {
2404 summary[1] = 'E';
2405 attr.c_cflag |= PARENB;
2406 attr.c_iflag |= (IGNPAR | INPCK);
2407 }
2408 else if (EQ (tem, Qodd))
2409 {
2410 summary[1] = 'O';
2411 attr.c_cflag |= (PARENB | PARODD);
2412 attr.c_iflag |= (IGNPAR | INPCK);
2413 }
2414#else
16bad4dd 2415 /* Don't error on no parity, which should be set by cfmakeraw. */
d888760c
GM		 2416 if (!NILP (tem))
2417 error ("Parity cannot be configured");
2418#endif
2419 childp2 = Fplist_put (childp2, QCparity, tem);
2420
2421 /* Configure stopbits. */
2422 if (!NILP (Fplist_member (contact, QCstopbits)))
2423 tem = Fplist_get (contact, QCstopbits);
2424 else
2425 tem = Fplist_get (p->childp, QCstopbits);
2426 if (NILP (tem))
2427 tem = make_number (1);
2428 CHECK_NUMBER (tem);
2429 if (XINT (tem) != 1 && XINT (tem) != 2)
2430 error (":stopbits must be nil (1 stopbit), 1, or 2");
2431 summary[2] = XINT (tem) + '0';
2432#if defined (CSTOPB)
2433 attr.c_cflag &= ~CSTOPB;
2434 if (XINT (tem) == 2)
2435 attr.c_cflag |= CSTOPB;
2436#else
16bad4dd 2437 /* Don't error on 1 stopbit, which should be set by cfmakeraw. */
d888760c
GM		 2438 if (XINT (tem) != 1)
2439 error ("Stopbits cannot be configured");
2440#endif
2441 childp2 = Fplist_put (childp2, QCstopbits, tem);
2442
2443 /* Configure flowcontrol. */
2444 if (!NILP (Fplist_member (contact, QCflowcontrol)))
2445 tem = Fplist_get (contact, QCflowcontrol);
2446 else
2447 tem = Fplist_get (p->childp, QCflowcontrol);
2448 if (!NILP (tem) && !EQ (tem, Qhw) && !EQ (tem, Qsw))
2449 error (":flowcontrol must be nil (no flowcontrol), `hw', or `sw'");
2450#if defined (CRTSCTS)
2451 attr.c_cflag &= ~CRTSCTS;
2452#endif
2453#if defined (CNEW_RTSCTS)
2454 attr.c_cflag &= ~CNEW_RTSCTS;
2455#endif
2456#if defined (IXON) && defined (IXOFF)
2457 attr.c_iflag &= ~(IXON | IXOFF);
2458#endif
2459 if (NILP (tem))
2460 {
2461 /* Already configured. */
2462 }
2463 else if (EQ (tem, Qhw))
2464 {
2465#if defined (CRTSCTS)
2466 attr.c_cflag |= CRTSCTS;
2467#elif defined (CNEW_RTSCTS)
2468 attr.c_cflag |= CNEW_RTSCTS;
2469#else
2470 error ("Hardware flowcontrol (RTS/CTS) not supported");
2471#endif
2472 }
2473 else if (EQ (tem, Qsw))
2474 {
2475#if defined (IXON) && defined (IXOFF)
2476 attr.c_iflag |= (IXON | IXOFF);
2477#else
2478 error ("Software flowcontrol (XON/XOFF) not supported");
2479#endif
2480 }
2481 childp2 = Fplist_put (childp2, QCflowcontrol, tem);
2482
2483 /* Activate configuration. */
2484 err = tcsetattr (p->outfd, TCSANOW, &attr);
2485 if (err != 0)
2486 error ("tcsetattr() failed: %s", emacs_strerror (errno));
2487
2488 childp2 = Fplist_put (childp2, QCsummary, build_string (summary));
2489 p->childp = childp2;
2490
2491}
a7ebc409 2492#endif /* not DOS_NT */
06e111a6
DN		 2493\f
2494/* System depended enumeration of and access to system processes a-la ps(1). */
2495
2496#ifdef HAVE_PROCFS
2497
2498/* Process enumeration and access via /proc. */
2499
2500Lisp_Object
971de7fb 2501list_system_processes (void)
06e111a6
DN		 2502{
2503 Lisp_Object procdir, match, proclist, next;
2504 struct gcpro gcpro1, gcpro2;
2505 register Lisp_Object tail;
2506
2507 GCPRO2 (procdir, match);
2508 /* For every process on the system, there's a directory in the
2509 "/proc" pseudo-directory whose name is the numeric ID of that
2510 process. */
2511 procdir = build_string ("/proc");
2512 match = build_string ("[0-9]+");
2513 proclist = directory_files_internal (procdir, Qnil, match, Qt, 0, Qnil);
2514
2515 /* `proclist' gives process IDs as strings. Destructively convert
2516 each string into a number. */
2517 for (tail = proclist; CONSP (tail); tail = next)
2518 {
2519 next = XCDR (tail);
2520 XSETCAR (tail, Fstring_to_number (XCAR (tail), Qnil));
2521 }
2522 UNGCPRO;
2523
2524 /* directory_files_internal returns the files in reverse order; undo
2525 that. */
2526 proclist = Fnreverse (proclist);
2527 return proclist;
2528}
2529
f8d23104
DN		 2530/* The WINDOWSNT implementation is in w32.c.
2531 The MSDOS implementation is in dosfns.c. */
c4605e09 2532#elif !defined (WINDOWSNT) && !defined (MSDOS)
06e111a6
DN		 2533
2534Lisp_Object
cf84bb53 2535list_system_processes (void)
06e111a6
DN		 2536{
2537 return Qnil;
2538}
91c85b70
EZ		 2539
2540#endif /* !defined (WINDOWSNT) */
06e111a6
DN		 2541
2542#ifdef GNU_LINUX
2543static void
2544time_from_jiffies (unsigned long long tval, long hz,
2545 time_t *sec, unsigned *usec)
2546{
2547 unsigned long long ullsec;
2548
2549 *sec = tval / hz;
2550 ullsec = *sec;
2551 tval -= ullsec * hz;
2552 /* Careful: if HZ > 1 million, then integer division by it yields zero. */
2553 if (hz <= 1000000)
2554 *usec = tval * 1000000 / hz;
2555 else
2556 *usec = tval / (hz / 1000000);
2557}
2558
2559static Lisp_Object
2560ltime_from_jiffies (unsigned long long tval, long hz)
2561{
2562 time_t sec;
2563 unsigned usec;
2564
2565 time_from_jiffies (tval, hz, &sec, &usec);
2566
2567 return list3 (make_number ((sec >> 16) & 0xffff),
2568 make_number (sec & 0xffff),
2569 make_number (usec));
2570}
2571
2572static void
2573get_up_time (time_t *sec, unsigned *usec)
2574{
2575 FILE *fup;
2576
2577 *sec = *usec = 0;
2578
2579 BLOCK_INPUT;
2580 fup = fopen ("/proc/uptime", "r");
2581
2582 if (fup)
2583 {
2584 double uptime, idletime;
2585
2586 /* The numbers in /proc/uptime use C-locale decimal point, but
2587 we already set ourselves to the C locale (see `fixup_locale'
2588 in emacs.c). */
2589 if (2 <= fscanf (fup, "%lf %lf", &uptime, &idletime))
2590 {
2591 *sec = uptime;
2592 *usec = (uptime - *sec) * 1000000;
2593 }
2594 fclose (fup);
2595 }
2596 UNBLOCK_INPUT;
2597}
2598
2599#define MAJOR(d) (((unsigned)(d) >> 8) & 0xfff)
2600#define MINOR(d) (((unsigned)(d) & 0xff) | (((unsigned)(d) & 0xfff00000) >> 12))
2601
2602static Lisp_Object
f4f634e8 2603procfs_ttyname (int rdev)
06e111a6
DN		 2604{
2605 FILE *fdev = NULL;
2606 char name[PATH_MAX];
2607
2608 BLOCK_INPUT;
2609 fdev = fopen ("/proc/tty/drivers", "r");
2610
2611 if (fdev)
2612 {
2613 unsigned major;
2614 unsigned long minor_beg, minor_end;
2615 char minor[25]; /* 2 32-bit numbers + dash */
2616 char *endp;
2617
2618 while (!feof (fdev) && !ferror (fdev))
2619 {
2620 if (3 <= fscanf (fdev, "%*s %s %u %s %*s\n", name, &major, minor)
2621 && major == MAJOR (rdev))
2622 {
2623 minor_beg = strtoul (minor, &endp, 0);
2624 if (*endp == '\0')
2625 minor_end = minor_beg;
2626 else if (*endp == '-')
2627 minor_end = strtoul (endp + 1, &endp, 0);
2628 else
2629 continue;
2630
2631 if (MINOR (rdev) >= minor_beg && MINOR (rdev) <= minor_end)
2632 {
10d66ec0 2633 sprintf (name + strlen (name), "%u", MINOR (rdev));
06e111a6
DN		 2634 break;
2635 }
2636 }
2637 }
2638 fclose (fdev);
2639 }
2640 UNBLOCK_INPUT;
2641 return build_string (name);
2642}
2643
2644static unsigned long
2645procfs_get_total_memory (void)
2646{
2647 FILE *fmem = NULL;
2648 unsigned long retval = 2 * 1024 * 1024; /* default: 2GB */
2649
2650 BLOCK_INPUT;
2651 fmem = fopen ("/proc/meminfo", "r");
2652
2653 if (fmem)
2654 {
2655 unsigned long entry_value;
2656 char entry_name[20]; /* the longest I saw is 13+1 */
2657
2658 while (!feof (fmem) && !ferror (fmem))
2659 {
2660 if (2 <= fscanf (fmem, "%s %lu kB\n", entry_name, &entry_value)
2661 && strcmp (entry_name, "MemTotal:") == 0)
2662 {
2663 retval = entry_value;
2664 break;
2665 }
2666 }
2667 fclose (fmem);
2668 }
2669 UNBLOCK_INPUT;
2670 return retval;
2671}
2672
2673Lisp_Object
f4f634e8 2674system_process_attributes (Lisp_Object pid)
06e111a6
DN		 2675{
2676 char procfn[PATH_MAX], fn[PATH_MAX];
2677 struct stat st;
2678 struct passwd *pw;
2679 struct group *gr;
2680 long clocks_per_sec;
2681 char *procfn_end;
2682 char procbuf[1025], *p, *q;
2683 int fd;
2684 ssize_t nread;
2685 const char *cmd = NULL;
2686 char *cmdline = NULL;
2687 size_t cmdsize = 0, cmdline_size;
2688 unsigned char c;
2689 int proc_id, ppid, uid, gid, pgrp, sess, tty, tpgid, thcount;
a70072c9
PE		 2690 unsigned long long u_time, s_time, cutime, cstime, start;
2691 long priority, niceness, rss;
06e111a6
DN		 2692 unsigned long minflt, majflt, cminflt, cmajflt, vsize;
2693 time_t sec;
2694 unsigned usec;
2b0a91e7 2695 EMACS_TIME tnow, tstart, tboot, telapsed;
06e111a6
DN		 2696 double pcpu, pmem;
2697 Lisp_Object attrs = Qnil;
2698 Lisp_Object cmd_str, decoded_cmd, tem;
2699 struct gcpro gcpro1, gcpro2;
2700 EMACS_INT uid_eint, gid_eint;
2701
2702 CHECK_NUMBER_OR_FLOAT (pid);
2703 proc_id = FLOATP (pid) ? XFLOAT_DATA (pid) : XINT (pid);
10d66ec0 2704 sprintf (procfn, "/proc/%u", proc_id);
06e111a6
DN		 2705 if (stat (procfn, &st) < 0)
2706 return attrs;
2707
2708 GCPRO2 (attrs, decoded_cmd);
2709
2710 /* euid egid */
2711 uid = st.st_uid;
2712 /* Use of EMACS_INT stops GCC whining about limited range of data type. */
2713 uid_eint = uid;
2714 attrs = Fcons (Fcons (Qeuid, make_fixnum_or_float (uid_eint)), attrs);
2715 BLOCK_INPUT;
2716 pw = getpwuid (uid);
2717 UNBLOCK_INPUT;
2718 if (pw)
2719 attrs = Fcons (Fcons (Quser, build_string (pw->pw_name)), attrs);
2720
2721 gid = st.st_gid;
2722 gid_eint = gid;
2723 attrs = Fcons (Fcons (Qegid, make_fixnum_or_float (gid_eint)), attrs);
2724 BLOCK_INPUT;
2725 gr = getgrgid (gid);
2726 UNBLOCK_INPUT;
2727 if (gr)
2728 attrs = Fcons (Fcons (Qgroup, build_string (gr->gr_name)), attrs);
2729
2730 strcpy (fn, procfn);
2731 procfn_end = fn + strlen (fn);
2732 strcpy (procfn_end, "/stat");
2733 fd = emacs_open (fn, O_RDONLY, 0);
cf84bb53 2734 if (fd >= 0 && (nread = emacs_read (fd, procbuf, sizeof (procbuf) - 1)) > 0)
06e111a6
DN		 2735 {
2736 procbuf[nread] = '\0';
2737 p = procbuf;
2738
2739 p = strchr (p, '(');
2740 if (p != NULL)
2741 {
2742 q = strrchr (p + 1, ')');
2743 /* comm */
2744 if (q != NULL)
2745 {
2746 cmd = p + 1;
2747 cmdsize = q - cmd;
2748 }
2749 }
2750 else
2751 q = NULL;
2752 if (cmd == NULL)
2753 {
2754 cmd = "???";
2755 cmdsize = 3;
2756 }
2757 /* Command name is encoded in locale-coding-system; decode it. */
2758 cmd_str = make_unibyte_string (cmd, cmdsize);
2759 decoded_cmd = code_convert_string_norecord (cmd_str,
2760 Vlocale_coding_system, 0);
2761 attrs = Fcons (Fcons (Qcomm, decoded_cmd), attrs);
2762
2763 if (q)
2764 {
2765 EMACS_INT ppid_eint, pgrp_eint, sess_eint, tpgid_eint, thcount_eint;
2766 p = q + 2;
2767 /* state ppid pgrp sess tty tpgid . minflt cminflt majflt cmajflt utime stime cutime cstime priority nice thcount . start vsize rss */
2768 sscanf (p, "%c %d %d %d %d %d %*u %lu %lu %lu %lu %Lu %Lu %Lu %Lu %ld %ld %d %*d %Lu %lu %ld",
2769 &c, &ppid, &pgrp, &sess, &tty, &tpgid,
2770 &minflt, &cminflt, &majflt, &cmajflt,
a70072c9
PE		 2771 &u_time, &s_time, &cutime, &cstime,
2772 &priority, &niceness, &thcount, &start, &vsize, &rss);
06e111a6
DN		 2773 {
2774 char state_str[2];
2775
2776 state_str[0] = c;
2777 state_str[1] = '\0';
2778 tem = build_string (state_str);
2779 attrs = Fcons (Fcons (Qstate, tem), attrs);
2780 }
2781 /* Stops GCC whining about limited range of data type. */
2782 ppid_eint = ppid;
2783 pgrp_eint = pgrp;
2784 sess_eint = sess;
2785 tpgid_eint = tpgid;
2786 thcount_eint = thcount;
2787 attrs = Fcons (Fcons (Qppid, make_fixnum_or_float (ppid_eint)), attrs);
2788 attrs = Fcons (Fcons (Qpgrp, make_fixnum_or_float (pgrp_eint)), attrs);
2789 attrs = Fcons (Fcons (Qsess, make_fixnum_or_float (sess_eint)), attrs);
2790 attrs = Fcons (Fcons (Qttname, procfs_ttyname (tty)), attrs);
2791 attrs = Fcons (Fcons (Qtpgid, make_fixnum_or_float (tpgid_eint)), attrs);
2792 attrs = Fcons (Fcons (Qminflt, make_fixnum_or_float (minflt)), attrs);
2793 attrs = Fcons (Fcons (Qmajflt, make_fixnum_or_float (majflt)), attrs);
2794 attrs = Fcons (Fcons (Qcminflt, make_fixnum_or_float (cminflt)), attrs);
2795 attrs = Fcons (Fcons (Qcmajflt, make_fixnum_or_float (cmajflt)), attrs);
2796 clocks_per_sec = sysconf (_SC_CLK_TCK);
2797 if (clocks_per_sec < 0)
2798 clocks_per_sec = 100;
2799 attrs = Fcons (Fcons (Qutime,
a70072c9 2800 ltime_from_jiffies (u_time, clocks_per_sec)),
06e111a6
DN		 2801 attrs);
2802 attrs = Fcons (Fcons (Qstime,
a70072c9 2803 ltime_from_jiffies (s_time, clocks_per_sec)),
06e111a6 2804 attrs);
ac1e4171 2805 attrs = Fcons (Fcons (Qtime,
a70072c9
PE		 2806 ltime_from_jiffies (s_time + u_time,
2807 clocks_per_sec)),
ac1e4171 2808 attrs);
06e111a6
DN		 2809 attrs = Fcons (Fcons (Qcutime,
2810 ltime_from_jiffies (cutime, clocks_per_sec)),
2811 attrs);
2812 attrs = Fcons (Fcons (Qcstime,
2813 ltime_from_jiffies (cstime, clocks_per_sec)),
ac1e4171
EZ		 2814 attrs);
2815 attrs = Fcons (Fcons (Qctime,
2816 ltime_from_jiffies (cstime+cutime, clocks_per_sec)),
06e111a6
DN		 2817 attrs);
2818 attrs = Fcons (Fcons (Qpri, make_number (priority)), attrs);
a70072c9 2819 attrs = Fcons (Fcons (Qnice, make_number (niceness)), attrs);
06e111a6
DN		 2820 attrs = Fcons (Fcons (Qthcount, make_fixnum_or_float (thcount_eint)), attrs);
2821 EMACS_GET_TIME (tnow);
2822 get_up_time (&sec, &usec);
2823 EMACS_SET_SECS (telapsed, sec);
2824 EMACS_SET_USECS (telapsed, usec);
2825 EMACS_SUB_TIME (tboot, tnow, telapsed);
2826 time_from_jiffies (start, clocks_per_sec, &sec, &usec);
2827 EMACS_SET_SECS (tstart, sec);
2828 EMACS_SET_USECS (tstart, usec);
2829 EMACS_ADD_TIME (tstart, tboot, tstart);
2830 attrs = Fcons (Fcons (Qstart,
2831 list3 (make_number
2832 ((EMACS_SECS (tstart) >> 16) & 0xffff),
2833 make_number
2834 (EMACS_SECS (tstart) & 0xffff),
2835 make_number
2836 (EMACS_USECS (tstart)))),
2837 attrs);
2838 attrs = Fcons (Fcons (Qvsize, make_fixnum_or_float (vsize/1024)), attrs);
2839 attrs = Fcons (Fcons (Qrss, make_fixnum_or_float (4*rss)), attrs);
2840 EMACS_SUB_TIME (telapsed, tnow, tstart);
2841 attrs = Fcons (Fcons (Qetime,
2842 list3 (make_number
2843 ((EMACS_SECS (telapsed) >> 16) & 0xffff),
2844 make_number
2845 (EMACS_SECS (telapsed) & 0xffff),
2846 make_number
2847 (EMACS_USECS (telapsed)))),
2848 attrs);
a70072c9 2849 time_from_jiffies (u_time + s_time, clocks_per_sec, &sec, &usec);
06e111a6
DN		 2850 pcpu = (sec + usec / 1000000.0) / (EMACS_SECS (telapsed) + EMACS_USECS (telapsed) / 1000000.0);
2851 if (pcpu > 1.0)
2852 pcpu = 1.0;
2853 attrs = Fcons (Fcons (Qpcpu, make_float (100 * pcpu)), attrs);
2854 pmem = 4.0 * 100 * rss / procfs_get_total_memory ();
2855 if (pmem > 100)
2856 pmem = 100;
2857 attrs = Fcons (Fcons (Qpmem, make_float (pmem)), attrs);
2858 }
2859 }
2860 if (fd >= 0)
2861 emacs_close (fd);
2862
2863 /* args */
2864 strcpy (procfn_end, "/cmdline");
2865 fd = emacs_open (fn, O_RDONLY, 0);
2866 if (fd >= 0)
2867 {
fbd02d7b
PE		 2868 char ch;
2869 for (cmdline_size = 0; emacs_read (fd, &ch, 1) == 1; cmdline_size++)
06e111a6 2870 {
fbd02d7b 2871 c = ch;
06e111a6
DN		 2872 if (isspace (c) || c == '\\')
2873 cmdline_size++; /* for later quoting, see below */
2874 }
2875 if (cmdline_size)
2876 {
2877 cmdline = xmalloc (cmdline_size + 1);
2878 lseek (fd, 0L, SEEK_SET);
2879 cmdline[0] = '\0';
2880 if ((nread = read (fd, cmdline, cmdline_size)) >= 0)
2881 cmdline[nread++] = '\0';
2882 else
2883 {
2884 /* Assigning zero to `nread' makes us skip the following
2885 two loops, assign zero to cmdline_size, and enter the
2886 following `if' clause that handles unknown command
2887 lines. */
2888 nread = 0;
2889 }
2890 /* We don't want trailing null characters. */
2891 for (p = cmdline + nread - 1; p > cmdline && !*p; p--)
2892 nread--;
2893 for (p = cmdline; p < cmdline + nread; p++)
2894 {
2895 /* Escape-quote whitespace and backslashes. */
2896 if (isspace (*p) || *p == '\\')
2897 {
2898 memmove (p + 1, p, nread - (p - cmdline));
2899 nread++;
2900 *p++ = '\\';
2901 }
2902 else if (*p == '\0')
2903 *p = ' ';
2904 }
2905 cmdline_size = nread;
2906 }
2907 if (!cmdline_size)
2908 {
2909 if (!cmd)
2910 cmd = "???";
2911 if (!cmdsize)
2912 cmdsize = strlen (cmd);
2913 cmdline_size = cmdsize + 2;
2914 cmdline = xmalloc (cmdline_size + 1);
2915 strcpy (cmdline, "[");
2916 strcat (strncat (cmdline, cmd, cmdsize), "]");
2917 }
2918 emacs_close (fd);
2919 /* Command line is encoded in locale-coding-system; decode it. */
2920 cmd_str = make_unibyte_string (cmdline, cmdline_size);
2921 decoded_cmd = code_convert_string_norecord (cmd_str,
2922 Vlocale_coding_system, 0);
2923 xfree (cmdline);
2924 attrs = Fcons (Fcons (Qargs, decoded_cmd), attrs);
2925 }
2926
2927 UNGCPRO;
2928 return attrs;
2929}
91c85b70 2930
f4f634e8
DN		 2931#elif defined (SOLARIS2) && defined (HAVE_PROCFS)
2932
2933/* The <procfs.h> header does not like to be included if _LP64 is defined and
2934 __FILE_OFFSET_BITS == 64. This is an ugly workaround that. */
2935#if !defined (_LP64) && defined (_FILE_OFFSET_BITS) && (_FILE_OFFSET_BITS == 64)
2936#define PROCFS_FILE_OFFSET_BITS_HACK 1
2937#undef _FILE_OFFSET_BITS
2938#else
2939#define PROCFS_FILE_OFFSET_BITS_HACK 0
2940#endif
2941
2942#include <procfs.h>
2943
2944#if PROCFS_FILE_OFFSET_BITS_HACK == 1
2945#define _FILE_OFFSET_BITS 64
2946#endif /* PROCFS_FILE_OFFSET_BITS_HACK == 1 */
2947
2948Lisp_Object
2949system_process_attributes (Lisp_Object pid)
2950{
2951 char procfn[PATH_MAX], fn[PATH_MAX];
2952 struct stat st;
2953 struct passwd *pw;
2954 struct group *gr;
2955 char *procfn_end;
2956 struct psinfo pinfo;
2957 int fd;
2958 ssize_t nread;
2959 int proc_id, uid, gid;
2960 Lisp_Object attrs = Qnil;
2961 Lisp_Object decoded_cmd, tem;
2962 struct gcpro gcpro1, gcpro2;
2963 EMACS_INT uid_eint, gid_eint;
2964
2965 CHECK_NUMBER_OR_FLOAT (pid);
2966 proc_id = FLOATP (pid) ? XFLOAT_DATA (pid) : XINT (pid);
2967 sprintf (procfn, "/proc/%u", proc_id);
2968 if (stat (procfn, &st) < 0)
2969 return attrs;
2970
2971 GCPRO2 (attrs, decoded_cmd);
2972
2973 /* euid egid */
2974 uid = st.st_uid;
2975 /* Use of EMACS_INT stops GCC whining about limited range of data type. */
2976 uid_eint = uid;
2977 attrs = Fcons (Fcons (Qeuid, make_fixnum_or_float (uid_eint)), attrs);
2978 BLOCK_INPUT;
2979 pw = getpwuid (uid);
2980 UNBLOCK_INPUT;
2981 if (pw)
2982 attrs = Fcons (Fcons (Quser, build_string (pw->pw_name)), attrs);
2983
2984 gid = st.st_gid;
2985 gid_eint = gid;
2986 attrs = Fcons (Fcons (Qegid, make_fixnum_or_float (gid_eint)), attrs);
2987 BLOCK_INPUT;
2988 gr = getgrgid (gid);
2989 UNBLOCK_INPUT;
2990 if (gr)
2991 attrs = Fcons (Fcons (Qgroup, build_string (gr->gr_name)), attrs);
2992
2993 strcpy (fn, procfn);
2994 procfn_end = fn + strlen (fn);
2995 strcpy (procfn_end, "/psinfo");
2996 fd = emacs_open (fn, O_RDONLY, 0);
2997 if (fd >= 0
cf84bb53 2998 && (nread = read (fd, (char*)&pinfo, sizeof (struct psinfo)) > 0))
f4f634e8
DN		 2999 {
3000 attrs = Fcons (Fcons (Qppid, make_fixnum_or_float (pinfo.pr_ppid)), attrs);
3001 attrs = Fcons (Fcons (Qpgrp, make_fixnum_or_float (pinfo.pr_pgid)), attrs);
3002 attrs = Fcons (Fcons (Qsess, make_fixnum_or_float (pinfo.pr_sid)), attrs);
3003
3004 {
3005 char state_str[2];
3006 state_str[0] = pinfo.pr_lwp.pr_sname;
3007 state_str[1] = '\0';
3008 tem = build_string (state_str);
3009 attrs = Fcons (Fcons (Qstate, tem), attrs);
3010 }
3011
3012 /* FIXME: missing Qttyname. psinfo.pr_ttydev is a dev_t,
3013 need to get a string from it. */
3014
3015 /* FIXME: missing: Qtpgid */
3016
3017 /* FIXME: missing:
3018 Qminflt
3019 Qmajflt
3020 Qcminflt
3021 Qcmajflt
3022
bfe11752
DN		 3023 Qutime
3024 Qcutime
f4f634e8
DN		 3025 Qstime
3026 Qcstime
3027 Are they available? */
3028
bfe11752 3029 attrs = Fcons (Fcons (Qtime,
f4f634e8
DN		 3030 list3 (make_number (pinfo.pr_time.tv_sec >> 16),
3031 make_number (pinfo.pr_time.tv_sec & 0xffff),
3032 make_number (pinfo.pr_time.tv_nsec))),
3033 attrs);
3034
bfe11752 3035 attrs = Fcons (Fcons (Qctime,
f4f634e8
DN		 3036 list3 (make_number (pinfo.pr_ctime.tv_sec >> 16),
3037 make_number (pinfo.pr_ctime.tv_sec & 0xffff),
3038 make_number (pinfo.pr_ctime.tv_nsec))),
3039 attrs);
3040
3041 attrs = Fcons (Fcons (Qpri, make_number (pinfo.pr_lwp.pr_pri)), attrs);
3042 attrs = Fcons (Fcons (Qnice, make_number (pinfo.pr_lwp.pr_nice)), attrs);
3043 attrs = Fcons (Fcons (Qthcount, make_fixnum_or_float (pinfo.pr_nlwp)), attrs);
3044
3045 attrs = Fcons (Fcons (Qstart,
3046 list3 (make_number (pinfo.pr_start.tv_sec >> 16),
3047 make_number (pinfo.pr_start.tv_sec & 0xffff),
3048 make_number (pinfo.pr_start.tv_nsec))),
3049 attrs);
3050 attrs = Fcons (Fcons (Qvsize, make_fixnum_or_float (pinfo.pr_size)), attrs);
3051 attrs = Fcons (Fcons (Qrss, make_fixnum_or_float (pinfo.pr_rssize)), attrs);
3052
3053 /* pr_pctcpu and pr_pctmem are encoded as a fixed point 16 bit number in [0 ... 1]. */
3054 attrs = Fcons (Fcons (Qpcpu, (pinfo.pr_pctcpu * 100.0) / (double)0x8000), attrs);
3055 attrs = Fcons (Fcons (Qpmem, (pinfo.pr_pctmem * 100.0) / (double)0x8000), attrs);
3056
3057 decoded_cmd
3058 = code_convert_string_norecord (make_unibyte_string (pinfo.pr_fname,
3059 strlen (pinfo.pr_fname)),
3060 Vlocale_coding_system, 0);
3061 attrs = Fcons (Fcons (Qcomm, decoded_cmd), attrs);
3062 decoded_cmd
3063 = code_convert_string_norecord (make_unibyte_string (pinfo.pr_psargs,
3064 strlen (pinfo.pr_psargs)),
3065 Vlocale_coding_system, 0);
3066 attrs = Fcons (Fcons (Qargs, decoded_cmd), attrs);
3067 }
3068
2d2d05d8
DN		 3069 if (fd >= 0)
3070 emacs_close (fd);
3071
f4f634e8
DN		 3072 UNGCPRO;
3073 return attrs;
3074}
06e111a6 3075
f8d23104
DN		 3076/* The WINDOWSNT implementation is in w32.c.
3077 The MSDOS implementation is in dosfns.c. */
c4605e09 3078#elif !defined (WINDOWSNT) && !defined (MSDOS)
06e111a6
DN		 3079
3080Lisp_Object
3081system_process_attributes (Lisp_Object pid)
3082{
9dcbe89b 3083 return Qnil;
06e111a6
DN		 3084}
3085
3086#endif /* !defined (WINDOWSNT) */
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