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Version 3.16
[bpt/emacs.git] / src / sysdep.c
CommitLineData
86a5659e 1/* Interfaces to system-dependent kernel and library entries.
275464e7 2 Copyright (C) 1985, 1986, 1987, 1988, 1993, 1994, 1995, 1999, 2000, 2001,
0b5538bd 3 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
86a5659e
JB		 4
5This file is part of GNU Emacs.
6
7GNU Emacs is free software; you can redistribute it and/or modify
8it under the terms of the GNU General Public License as published by
7088d1ca 9the Free Software Foundation; either version 2, or (at your option)
86a5659e
JB		 10any later version.
11
12GNU Emacs is distributed in the hope that it will be useful,
13but WITHOUT ANY WARRANTY; without even the implied warranty of
14MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15GNU General Public License for more details.
16
17You should have received a copy of the GNU General Public License
18along with GNU Emacs; see the file COPYING. If not, write to
4fc5845f
LK		 19the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
20Boston, MA 02110-1301, USA. */
86a5659e 21
4838e624
PJ		 22#ifdef HAVE_CONFIG_H
23#include <config.h>
24#endif
86a5659e
JB		 25
26#include <signal.h>
5890e9f7 27#include <stdio.h>
86a5659e 28#include <setjmp.h>
d3eb3bfa
DL		 29#ifdef HAVE_UNISTD_H
30#include <unistd.h>
31#endif
86a5659e 32#include "lisp.h"
8296bbf8
DL		 33/* Including stdlib.h isn't necessarily enough to get srandom
34 declared, e.g. without __USE_XOPEN_EXTENDED with glibc 2. */
35#ifdef HAVE_RANDOM
1bfb1345
DL		 36#if 0 /* It turns out that defining _OSF_SOURCE in osf5-0.h gets
37 random prototyped as returning `int'. It looks to me as
38 though the best way to DTRT is to prefer the rand48 functions
39 (per libc.info). -- fx */
8296bbf8 40extern long int random P_ ((void));
1bfb1345 41#endif
ff4c29f4
GM		 42#if 0 /* Don't prototype srandom; it takes an unsigned argument on
43 some systems, and an unsigned long on others, like FreeBSD
44 4.1. */
8296bbf8
DL		 45extern void srandom P_ ((unsigned int));
46#endif
ff4c29f4 47#endif
8296bbf8 48
9ac0d9e0 49#include "blockinput.h"
86a5659e 50
e0f712ba 51#ifdef MAC_OS8
e194b7b9 52#include <sys/param.h>
1a578e9b 53
c4ea52a6
RS		 54#ifndef subprocesses
55/* Nonzero means delete a process right away if it exits (process.c). */
56static int delete_exited_processes;
57#endif
e0f712ba 58#endif /* MAC_OS8 */
c4ea52a6 59
fe03522b 60#ifdef WINDOWSNT
e15b6288
JR		 61#define read sys_read
62#define write sys_write
fe03522b 63#include <windows.h>
e36ec798
AI		 64#ifndef NULL
65#define NULL 0
66#endif
fe03522b
RS		 67#endif /* not WINDOWSNT */
68
986ffb24
JB		 69/* Does anyone other than VMS need this? */
70#ifndef fwrite
71#define sys_fwrite fwrite
72#else
73#undef fwrite
74#endif
75
86a5659e
JB		 76#include <sys/types.h>
77#include <sys/stat.h>
78#include <errno.h>
79
f95c3f91 80#ifdef HAVE_SETPGID
2b7e8799 81#if !defined (USG) || defined (BSD_PGRPS)
c8875a65 82#undef setpgrp
f95c3f91
GM		 83#define setpgrp setpgid
84#endif
2b7e8799 85#endif
f95c3f91 86
b05af5d3
PE		 87/* Get SI_SRPC_DOMAIN, if it is available. */
88#ifdef HAVE_SYS_SYSTEMINFO_H
89#include <sys/systeminfo.h>
90#endif
91
207bdbdb
RS		 92#ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida, MW Aug 1993 */
93#include <dos.h>
94#include "dosfns.h"
95#include "msdos.h"
96#include <sys/param.h>
15614e61
RS		 97
98#if __DJGPP__ > 1
99extern int etext;
100extern unsigned start __asm__ ("start");
101#endif
207bdbdb
RS		 102#endif
103
e36ec798 104#ifndef USE_CRT_DLL
9ee9af7a 105#ifndef errno
86a5659e 106extern int errno;
9ee9af7a 107#endif
e36ec798 108#endif
86a5659e 109
bb4bc8e2
RM		 110#ifdef VMS
111#include <rms.h>
112#include <ttdef.h>
113#include <tt2def.h>
114#include <iodef.h>
115#include <ssdef.h>
116#include <descrip.h>
117#include <fibdef.h>
118#include <atrdef.h>
119#include <ctype.h>
120#include <string.h>
121#ifdef __GNUC__
122#include <sys/file.h>
123#else
124#include <file.h>
125#endif
126#undef F_SETFL
127#ifndef RAB$C_BID
128#include <rab.h>
129#endif
fe03522b 130#define MAXIOSIZE (32 * PAGESIZE) /* Don't I/O more than 32 blocks at a time */
bb4bc8e2
RM		 131#endif /* VMS */
132
7ce1c4de
RS		 133#ifndef VMS
134#include <sys/file.h>
135#endif /* not VMS */
136
612221ab 137#ifdef HAVE_FCNTL_H
bb4bc8e2
RM		 138#include <fcntl.h>
139#endif
86a5659e 140
207bdbdb 141#ifndef MSDOS
86a5659e 142#include <sys/ioctl.h>
207bdbdb 143#endif
2a633456 144
e04a4e0d 145#include "systty.h"
94c8642a 146#include "syswait.h"
86a5659e 147
86a5659e
JB		 148#ifdef BROKEN_TIOCGWINSZ
149#undef TIOCGWINSZ
8dca3179 150#undef TIOCSWINSZ
86a5659e
JB		 151#endif
152
c4ea52a6 153#if defined (USG) || defined (DGUX)
86a5659e 154#include <sys/utsname.h>
86a5659e
JB		 155#ifndef MEMORY_IN_STRING_H
156#include <memory.h>
157#endif
81444907 158#if defined (TIOCGWINSZ) || defined (ISC4_0)
86a5659e
JB		 159#ifdef NEED_SIOCTL
160#include <sys/sioctl.h>
161#endif
162#ifdef NEED_PTEM_H
163#include <sys/stream.h>
164#include <sys/ptem.h>
165#endif
81444907 166#endif /* TIOCGWINSZ or ISC4_0 */
b917b2e2 167#endif /* USG or DGUX */
86a5659e 168
86a5659e
JB		 169extern int quit_char;
170
e36ec798 171#include "keyboard.h"
0137dbf7 172#include "frame.h"
86a5659e
JB		 173#include "window.h"
174#include "termhooks.h"
175#include "termchar.h"
176#include "termopts.h"
177#include "dispextern.h"
178#include "process.h"
179
fe03522b
RS		 180#ifdef WINDOWSNT
181#include <direct.h>
182/* In process.h which conflicts with the local copy. */
183#define _P_WAIT 0
184int _CRTAPI1 _spawnlp (int, const char *, const char *, ...);
185int _CRTAPI1 _getpid (void);
b6682dd9 186extern char *getwd (char *);
fe03522b
RS		 187#endif
188
86a5659e
JB		 189#ifdef NONSYSTEM_DIR_LIBRARY
190#include "ndir.h"
191#endif /* NONSYSTEM_DIR_LIBRARY */
192
91bac16a
JB		 193#include "syssignal.h"
194#include "systime.h"
d79998bc
KH		 195#ifdef HAVE_UTIME_H
196#include <utime.h>
197#endif
198
199#ifndef HAVE_UTIMES
200#ifndef HAVE_STRUCT_UTIMBUF
201/* We want to use utime rather than utimes, but we couldn't find the
202 structure declaration. We'll use the traditional one. */
203struct utimbuf {
204 long actime;
205 long modtime;
206};
207#endif
208#endif
86a5659e 209
a00d5589
RS		 210/* LPASS8 is new in 4.3, and makes cbreak mode provide all 8 bits. */
211#ifndef LPASS8
212#define LPASS8 0
213#endif
214
215#ifdef BSD4_1
216#define LNOFLSH 0100000
217#endif
218
86a5659e
JB		 219static int baud_convert[] =
220#ifdef BAUD_CONVERT
221 BAUD_CONVERT;
222#else
223 {
224 0, 50, 75, 110, 135, 150, 200, 300, 600, 1200,
225 1800, 2400, 4800, 9600, 19200, 38400
226 };
227#endif
228
f0d21750
GM		 229#ifdef HAVE_SPEED_T
230#include <termios.h>
f0d21750 231#else
ba5971b3 232#if defined (HAVE_LIBNCURSES) && ! defined (NCURSES_OSPEED_T)
ba5971b3 233#else
8a2a6032 234#if defined (HAVE_TERMIOS_H) && defined (GNU_LINUX)
515b04d0 235#include <termios.h>
f2361c60 236#endif
ba5971b3 237#endif
f0d21750 238#endif
86a5659e 239
5bdd7bdd
GM		 240int emacs_ospeed;
241
91bac16a 242/* The file descriptor for Emacs's input terminal.
0217ed57
RS		 243 Under Unix, this is normally zero except when using X;
244 under VMS, we place the input channel number here. */
245int input_fd;
b9c4113e
RS		 246
247void croak P_ ((char *));
248
6d0d20a1
RS		 249#ifdef AIXHFT
250void hft_init ();
251void hft_reset ();
252#endif
b9c4113e 253
89723395
GM		 254/* Temporary used by `sigblock' when defined in terms of signprocmask. */
255
256SIGMASKTYPE sigprocmask_set;
257
f78f1a83 258
2412f586 259#ifndef HAVE_GET_CURRENT_DIR_NAME
f78f1a83 260
b6682dd9 261/* Return the current working directory. Returns NULL on errors.
f78f1a83
EZ		 262 Any other returned value must be freed with free. This is used
263 only when get_current_dir_name is not defined on the system. */
264char*
265get_current_dir_name ()
266{
267 char *buf;
268 char *pwd;
269 struct stat dotstat, pwdstat;
270 /* If PWD is accurate, use it instead of calling getwd. PWD is
271 sometimes a nicer name, and using it may avoid a fatal error if a
272 parent directory is searchable but not readable. */
273 if ((pwd = getenv ("PWD")) != 0
274 && (IS_DIRECTORY_SEP (*pwd) || (*pwd && IS_DEVICE_SEP (pwd[1])))
275 && stat (pwd, &pwdstat) == 0
276 && stat (".", &dotstat) == 0
277 && dotstat.st_ino == pwdstat.st_ino
278 && dotstat.st_dev == pwdstat.st_dev
279#ifdef MAXPATHLEN
280 && strlen (pwd) < MAXPATHLEN
281#endif
282 )
283 {
284 buf = (char *) malloc (strlen (pwd) + 1);
285 if (!buf)
286 return NULL;
287 strcpy (buf, pwd);
288 }
289#ifdef HAVE_GETCWD
290 else
291 {
292 size_t buf_size = 1024;
b6682dd9 293 buf = (char *) malloc (buf_size);
f78f1a83
EZ		 294 if (!buf)
295 return NULL;
296 for (;;)
297 {
298 if (getcwd (buf, buf_size) == buf)
299 break;
300 if (errno != ERANGE)
301 {
302 int tmp_errno = errno;
303 free (buf);
304 errno = tmp_errno;
305 return NULL;
306 }
307 buf_size *= 2;
308 buf = (char *) realloc (buf, buf_size);
309 if (!buf)
310 return NULL;
311 }
312 }
313#else
314 else
315 {
316 /* We need MAXPATHLEN here. */
317 buf = (char *) malloc (MAXPATHLEN + 1);
318 if (!buf)
319 return NULL;
320 if (getwd (buf) == NULL)
321 {
322 int tmp_errno = errno;
323 free (buf);
324 errno = tmp_errno;
325 return NULL;
326 }
327 }
328#endif
329 return buf;
330}
331#endif
332
64e971c3
RS		 333\f
334/* Specify a different file descriptor for further input operations. */
335
336void
337change_input_fd (fd)
338 int fd;
339{
340 input_fd = fd;
341}
342
343/* Discard pending input on descriptor input_fd. */
91bac16a 344
08633194 345void
86a5659e
JB		 346discard_tty_input ()
347{
fe03522b 348#ifndef WINDOWSNT
91bac16a 349 struct emacs_tty buf;
86a5659e
JB		 350
351 if (noninteractive)
352 return;
353
354 /* Discarding input is not safe when the input could contain
355 replies from the X server. So don't do it. */
356 if (read_socket_hook)
357 return;
358
359#ifdef VMS
360 end_kbd_input ();
91bac16a
JB		 361 SYS$QIOW (0, input_fd, IO$_READVBLK|IO$M_PURGE, input_iosb, 0, 0,
362 &buf.main, 0, 0, terminator_mask, 0, 0);
86a5659e
JB		 363 queue_kbd_input ();
364#else /* not VMS */
365#ifdef APOLLO
366 {
367 int zero = 0;
64e971c3 368 ioctl (input_fd, TIOCFLUSH, &zero);
86a5659e
JB		 369 }
370#else /* not Apollo */
fe03522b 371#ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */
207bdbdb 372 while (dos_keyread () != -1)
fe03522b 373 ;
207bdbdb 374#else /* not MSDOS */
91bac16a
JB		 375 EMACS_GET_TTY (input_fd, &buf);
376 EMACS_SET_TTY (input_fd, &buf, 0);
207bdbdb 377#endif /* not MSDOS */
86a5659e
JB		 378#endif /* not Apollo */
379#endif /* not VMS */
fe03522b 380#endif /* not WINDOWSNT */
86a5659e
JB		 381}
382
383#ifdef SIGTSTP
384
64e971c3
RS		 385/* Arrange for character C to be read as the next input from
386 the terminal. */
387
dfcf069d 388void
0c2338d8
DL		 389#ifdef PROTOTYPES
390stuff_char (char c)
391#else
86a5659e
JB		 392stuff_char (c)
393 char c;
0c2338d8 394#endif
86a5659e 395{
23dab951
RS		 396 if (read_socket_hook)
397 return;
398
86a5659e
JB		 399/* Should perhaps error if in batch mode */
400#ifdef TIOCSTI
64e971c3 401 ioctl (input_fd, TIOCSTI, &c);
86a5659e 402#else /* no TIOCSTI */
71f06467 403 error ("Cannot stuff terminal input characters in this version of Unix");
86a5659e
JB		 404#endif /* no TIOCSTI */
405}
406
407#endif /* SIGTSTP */
64e971c3 408\f
08633194 409void
86a5659e
JB		 410init_baud_rate ()
411{
86a5659e 412 if (noninteractive)
5bdd7bdd 413 emacs_ospeed = 0;
86a5659e
JB		 414 else
415 {
dfc366c9
RS		 416#ifdef INIT_BAUD_RATE
417 INIT_BAUD_RATE ();
418#else
fe03522b 419#ifdef DOS_NT
5bdd7bdd 420 emacs_ospeed = 15;
fe03522b 421#else /* not DOS_NT */
86a5659e 422#ifdef VMS
91bac16a
JB		 423 struct sensemode sg;
424
425 SYS$QIOW (0, input_fd, IO$_SENSEMODE, &sg, 0, 0,
86a5659e 426 &sg.class, 12, 0, 0, 0, 0 );
5bdd7bdd 427 emacs_ospeed = sg.xmit_baud;
91bac16a 428#else /* not VMS */
e04a4e0d
JB		 429#ifdef HAVE_TERMIOS
430 struct termios sg;
91bac16a 431
71f06467 432 sg.c_cflag = B9600;
64e971c3 433 tcgetattr (input_fd, &sg);
5bdd7bdd 434 emacs_ospeed = cfgetospeed (&sg);
5baff9ce 435#if defined (USE_GETOBAUD) && defined (getobaud)
2f43149b 436 /* m88k-motorola-sysv3 needs this (ghazi@noc.rutgers.edu) 9/1/94. */
5bdd7bdd
GM		 437 if (emacs_ospeed == 0)
438 emacs_ospeed = getobaud (sg.c_cflag);
2f43149b 439#endif
e04a4e0d
JB		 440#else /* neither VMS nor TERMIOS */
441#ifdef HAVE_TERMIO
442 struct termio sg;
91bac16a 443
71f06467 444 sg.c_cflag = B9600;
e04a4e0d 445#ifdef HAVE_TCATTR
64e971c3 446 tcgetattr (input_fd, &sg);
e04a4e0d 447#else
6c65530f 448 ioctl (input_fd, TCGETA, &sg);
e04a4e0d 449#endif
5bdd7bdd 450 emacs_ospeed = sg.c_cflag & CBAUD;
e04a4e0d 451#else /* neither VMS nor TERMIOS nor TERMIO */
91bac16a 452 struct sgttyb sg;
177c0ea7 453
91bac16a 454 sg.sg_ospeed = B9600;
64e971c3 455 if (ioctl (input_fd, TIOCGETP, &sg) < 0)
d7272cff 456 abort ();
5bdd7bdd 457 emacs_ospeed = sg.sg_ospeed;
91bac16a 458#endif /* not HAVE_TERMIO */
e04a4e0d 459#endif /* not HAVE_TERMIOS */
86a5659e 460#endif /* not VMS */
fe03522b 461#endif /* not DOS_NT */
dfc366c9 462#endif /* not INIT_BAUD_RATE */
86a5659e 463 }
177c0ea7 464
5bdd7bdd
GM		 465 baud_rate = (emacs_ospeed < sizeof baud_convert / sizeof baud_convert[0]
466 ? baud_convert[emacs_ospeed] : 9600);
86a5659e
JB		 467 if (baud_rate == 0)
468 baud_rate = 1200;
469}
470
471/*ARGSUSED*/
dfcf069d 472void
86a5659e
JB		 473set_exclusive_use (fd)
474 int fd;
475{
476#ifdef FIOCLEX
477 ioctl (fd, FIOCLEX, 0);
478#endif
479 /* Ok to do nothing if this feature does not exist */
480}
64e971c3 481\f
86a5659e
JB		 482#ifndef subprocesses
483
484wait_without_blocking ()
485{
2a633456 486#ifdef BSD_SYSTEM
86a5659e
JB		 487 wait3 (0, WNOHANG | WUNTRACED, 0);
488#else
489 croak ("wait_without_blocking");
490#endif
491 synch_process_alive = 0;
492}
493
494#endif /* not subprocesses */
495
496int wait_debugging; /* Set nonzero to make following function work under dbx
fe03522b 497 (at least for bsd). */
86a5659e
JB		 498
499SIGTYPE
500wait_for_termination_signal ()
501{}
502
503/* Wait for subprocess with process id `pid' to terminate and
504 make sure it will get eliminated (not remain forever as a zombie) */
505
08633194 506void
86a5659e
JB		 507wait_for_termination (pid)
508 int pid;
509{
510 while (1)
511 {
512#ifdef subprocesses
513#ifdef VMS
514 int status;
515
986ffb24 516 status = SYS$FORCEX (&pid, 0, 0);
86a5659e
JB		 517 break;
518#else /* not VMS */
2a633456 519#if defined (BSD_SYSTEM) || (defined (HPUX) && !defined (HPUX_5))
4c8975ad
RS		 520 /* Note that kill returns -1 even if the process is just a zombie now.
521 But inevitably a SIGCHLD interrupt should be generated
522 and child_sig will do wait3 and make the process go away. */
523 /* There is some indication that there is a bug involved with
524 termination of subprocesses, perhaps involving a kernel bug too,
525 but no idea what it is. Just as a hunch we signal SIGCHLD to see
526 if that causes the problem to go away or get worse. */
527 sigsetmask (sigmask (SIGCHLD));
528 if (0 > kill (pid, 0))
fe03522b 529 {
4c8975ad
RS		 530 sigsetmask (SIGEMPTYMASK);
531 kill (getpid (), SIGCHLD);
532 break;
533 }
534 if (wait_debugging)
535 sleep (1);
536 else
537 sigpause (SIGEMPTYMASK);
2a633456 538#else /* not BSD_SYSTEM, and not HPUX version >= 6 */
05695621 539#if defined (UNIPLUS)
4c8975ad
RS		 540 if (0 > kill (pid, 0))
541 break;
542 wait (0);
2a633456 543#else /* neither BSD_SYSTEM nor UNIPLUS: random sysV */
8a2a6032 544#ifdef POSIX_SIGNALS /* would this work for GNU/Linux as well? */
9ab714c7 545 sigblock (sigmask (SIGCHLD));
59957f85
GM		 546 errno = 0;
547 if (kill (pid, 0) == -1 && errno == ESRCH)
9ab714c7
RS		 548 {
549 sigunblock (sigmask (SIGCHLD));
550 break;
551 }
ac3ac859 552
0fdcb867 553 sigsuspend (&empty_mask);
9ab714c7 554#else /* not POSIX_SIGNALS */
4c8975ad
RS		 555#ifdef HAVE_SYSV_SIGPAUSE
556 sighold (SIGCHLD);
557 if (0 > kill (pid, 0))
558 {
559 sigrelse (SIGCHLD);
560 break;
561 }
562 sigpause (SIGCHLD);
563#else /* not HAVE_SYSV_SIGPAUSE */
fe03522b
RS		 564#ifdef WINDOWSNT
565 wait (0);
566 break;
567#else /* not WINDOWSNT */
4c8975ad 568 if (0 > kill (pid, 0))
86a5659e 569 break;
4c8975ad
RS		 570 /* Using sleep instead of pause avoids timing error.
571 If the inferior dies just before the sleep,
572 we lose just one second. */
573 sleep (1);
fe03522b 574#endif /* not WINDOWSNT */
4c8975ad 575#endif /* not HAVE_SYSV_SIGPAUSE */
9ab714c7 576#endif /* not POSIX_SIGNALS */
4c8975ad 577#endif /* not UNIPLUS */
2a633456 578#endif /* not BSD_SYSTEM, and not HPUX version >= 6 */
86a5659e
JB		 579#endif /* not VMS */
580#else /* not subprocesses */
15614e61
RS		 581#if __DJGPP__ > 1
582 break;
583#else /* not __DJGPP__ > 1 */
86a5659e
JB		 584#ifndef BSD4_1
585 if (kill (pid, 0) < 0)
586 break;
587 wait (0);
588#else /* BSD4_1 */
589 int status;
590 status = wait (0);
591 if (status == pid || status == -1)
592 break;
593#endif /* BSD4_1 */
15614e61 594#endif /* not __DJGPP__ > 1*/
86a5659e
JB		 595#endif /* not subprocesses */
596 }
597}
598
599#ifdef subprocesses
600
601/*
602 * flush any pending output
603 * (may flush input as well; it does not matter the way we use it)
604 */
177c0ea7 605
08633194 606void
86a5659e
JB		 607flush_pending_output (channel)
608 int channel;
609{
610#ifdef HAVE_TERMIOS
611 /* If we try this, we get hit with SIGTTIN, because
612 the child's tty belongs to the child's pgrp. */
613#else
614#ifdef TCFLSH
615 ioctl (channel, TCFLSH, 1);
616#else
617#ifdef TIOCFLUSH
618 int zero = 0;
619 /* 3rd arg should be ignored
620 but some 4.2 kernels actually want the address of an int
621 and nonzero means something different. */
622 ioctl (channel, TIOCFLUSH, &zero);
623#endif
624#endif
625#endif
626}
64e971c3 627\f
86a5659e
JB		 628#ifndef VMS
629/* Set up the terminal at the other end of a pseudo-terminal that
630 we will be controlling an inferior through.
631 It should not echo or do line-editing, since that is done
632 in Emacs. No padding needed for insertion into an Emacs buffer. */
633
08633194 634void
86a5659e
JB		 635child_setup_tty (out)
636 int out;
637{
fe03522b 638#ifndef DOS_NT
91bac16a
JB		 639 struct emacs_tty s;
640
641 EMACS_GET_TTY (out, &s);
86a5659e 642
31be8d24 643#if defined (HAVE_TERMIO) || defined (HAVE_TERMIOS)
91bac16a
JB		 644 s.main.c_oflag |= OPOST; /* Enable output postprocessing */
645 s.main.c_oflag &= ~ONLCR; /* Disable map of NL to CR-NL on output */
9d4e5eea 646#ifdef NLDLY
91bac16a
JB		 647 s.main.c_oflag &= ~(NLDLY|CRDLY|TABDLY|BSDLY|VTDLY|FFDLY);
648 /* No output delays */
9d4e5eea 649#endif
91bac16a
JB		 650 s.main.c_lflag &= ~ECHO; /* Disable echo */
651 s.main.c_lflag |= ISIG; /* Enable signals */
2ea99a1e 652#if 0 /* This causes bugs in (for instance) telnet to certain sites. */
402c9a51
GM		 653 s.main.c_iflag &= ~ICRNL; /* Disable map of CR to NL on input */
654#ifdef INLCR /* Just being cautious, since I can't check how
655 widespread INLCR is--rms. */
656 s.main.c_iflag &= ~INLCR; /* Disable map of NL to CR on input */
657#endif
5a04bfa9 658#endif
9d4e5eea
RS		 659#ifdef IUCLC
660 s.main.c_iflag &= ~IUCLC; /* Disable downcasing on input. */
661#endif
f7097b2a
RS		 662#ifdef ISTRIP
663 s.main.c_iflag &= ~ISTRIP; /* don't strip 8th bit on input */
664#endif
23e4c8be 665#ifdef OLCUC
9d4e5eea
RS		 666 s.main.c_oflag &= ~OLCUC; /* Disable upcasing on output. */
667#endif
f7097b2a 668 s.main.c_oflag &= ~TAB3; /* Disable tab expansion */
1bf96fb5 669 s.main.c_cflag = (s.main.c_cflag & ~CSIZE) | CS8; /* Don't strip 8th bit */
91bac16a 670#if 0
eb8c3be9 671 /* Said to be unnecessary: */
91bac16a
JB		 672 s.main.c_cc[VMIN] = 1; /* minimum number of characters to accept */
673 s.main.c_cc[VTIME] = 0; /* wait forever for at least 1 character */
674#endif
675
676 s.main.c_lflag |= ICANON; /* Enable erase/kill and eof processing */
677 s.main.c_cc[VEOF] = 04; /* insure that EOF is Control-D */
441f6399
RS		 678 s.main.c_cc[VERASE] = CDISABLE; /* disable erase processing */
679 s.main.c_cc[VKILL] = CDISABLE; /* disable kill processing */
91bac16a 680
86a5659e 681#ifdef HPUX
91bac16a 682 s.main.c_cflag = (s.main.c_cflag & ~CBAUD) | B9600; /* baud rate sanity */
86a5659e 683#endif /* HPUX */
91bac16a 684
dfe598b5
RS		 685#ifdef SIGNALS_VIA_CHARACTERS
686 /* the QUIT and INTR character are used in process_send_signal
687 so set them here to something useful. */
fa51fa32 688 if (s.main.c_cc[VQUIT] == CDISABLE)
dfe598b5 689 s.main.c_cc[VQUIT] = '\\'&037; /* Control-\ */
fa51fa32 690 if (s.main.c_cc[VINTR] == CDISABLE)
dfe598b5
RS		 691 s.main.c_cc[VINTR] = 'C'&037; /* Control-C */
692#endif /* not SIGNALS_VIA_CHARACTERS */
693
86a5659e
JB		 694#ifdef AIX
695/* AIX enhanced edit loses NULs, so disable it */
696#ifndef IBMR2AIX
91bac16a
JB		 697 s.main.c_line = 0;
698 s.main.c_iflag &= ~ASCEDIT;
86a5659e
JB		 699#endif
700 /* Also, PTY overloads NUL and BREAK.
701 don't ignore break, but don't signal either, so it looks like NUL. */
91bac16a
JB		 702 s.main.c_iflag &= ~IGNBRK;
703 s.main.c_iflag &= ~BRKINT;
dfe598b5
RS		 704 /* rms: Formerly it set s.main.c_cc[VINTR] to 0377 here
705 unconditionally. Then a SIGNALS_VIA_CHARACTERS conditional
706 would force it to 0377. That looks like duplicated code. */
707#ifndef SIGNALS_VIA_CHARACTERS
e6cc3307 708 /* QUIT and INTR work better as signals, so disable character forms */
fa51fa32
KS		 709 s.main.c_cc[VQUIT] = CDISABLE;
710 s.main.c_cc[VINTR] = CDISABLE;
91bac16a 711 s.main.c_lflag &= ~ISIG;
e6cc3307 712#endif /* no TIOCGPGRP or no TIOCGLTC or no TIOCGETC */
fa51fa32 713 s.main.c_cc[VEOL] = CDISABLE;
91bac16a 714 s.main.c_cflag = (s.main.c_cflag & ~CBAUD) | B9600; /* baud rate sanity */
86a5659e
JB		 715#endif /* AIX */
716
717#else /* not HAVE_TERMIO */
91bac16a
JB		 718
719 s.main.sg_flags &= ~(ECHO | CRMOD | ANYP | ALLDELAY | RAW | LCASE
720 | CBREAK | TANDEM);
a00d5589 721 s.main.sg_flags |= LPASS8;
91bac16a
JB		 722 s.main.sg_erase = 0377;
723 s.main.sg_kill = 0377;
1bf96fb5 724 s.lmode = LLITOUT | s.lmode; /* Don't strip 8th bit */
91bac16a 725
86a5659e
JB		 726#endif /* not HAVE_TERMIO */
727
91bac16a 728 EMACS_SET_TTY (out, &s, 0);
86a5659e
JB		 729
730#ifdef BSD4_1
731 if (interrupt_input)
732 reset_sigio ();
733#endif /* BSD4_1 */
734#ifdef RTU
735 {
736 int zero = 0;
737 ioctl (out, FIOASYNC, &zero);
738 }
739#endif /* RTU */
fe03522b 740#endif /* not DOS_NT */
86a5659e
JB		 741}
742#endif /* not VMS */
743
744#endif /* subprocesses */
64e971c3 745\f
86a5659e
JB		 746/* Record a signal code and the handler for it. */
747struct save_signal
748{
749 int code;
35a05cca 750 SIGTYPE (*handler) P_ ((int));
86a5659e
JB		 751};
752
35a05cca
AS		 753static void save_signal_handlers P_ ((struct save_signal *));
754static void restore_signal_handlers P_ ((struct save_signal *));
755
86a5659e
JB		 756/* Suspend the Emacs process; give terminal to its superior. */
757
08633194 758void
86a5659e
JB		 759sys_suspend ()
760{
761#ifdef VMS
88191e36
RS		 762 /* "Foster" parentage allows emacs to return to a subprocess that attached
763 to the current emacs as a cheaper than starting a whole new process. This
764 is set up by KEPTEDITOR.COM. */
765 unsigned long parent_id, foster_parent_id;
766 char *fpid_string;
767
768 fpid_string = getenv ("EMACS_PARENT_PID");
769 if (fpid_string != NULL)
770 {
771 sscanf (fpid_string, "%x", &foster_parent_id);
772 if (foster_parent_id != 0)
773 parent_id = foster_parent_id;
774 else
775 parent_id = getppid ();
776 }
777 else
778 parent_id = getppid ();
779
9ac0d9e0 780 xfree (fpid_string); /* On VMS, this was malloc'd */
86a5659e 781
86a5659e
JB		 782 if (parent_id && parent_id != 0xffffffff)
783 {
784 SIGTYPE (*oldsig)() = (int) signal (SIGINT, SIG_IGN);
785 int status = LIB$ATTACH (&parent_id) & 1;
786 signal (SIGINT, oldsig);
787 return status;
788 }
789 else
790 {
791 struct {
792 int l;
793 char *a;
794 } d_prompt;
795 d_prompt.l = sizeof ("Emacs: "); /* Our special prompt */
796 d_prompt.a = "Emacs: "; /* Just a reminder */
986ffb24 797 LIB$SPAWN (0, 0, 0, 0, 0, 0, 0, 0, 0, 0, &d_prompt, 0);
86a5659e
JB		 798 return 1;
799 }
800 return -1;
801#else
c4ea52a6 802#if defined (SIGTSTP) && !defined (MSDOS)
86a5659e 803
5a570e37 804 {
e89a2cd5 805 int pgrp = EMACS_GETPGRP (0);
5a570e37
JB		 806 EMACS_KILLPG (pgrp, SIGTSTP);
807 }
86a5659e
JB		 808
809#else /* No SIGTSTP */
810#ifdef USG_JOBCTRL /* If you don't know what this is don't mess with it */
811 ptrace (0, 0, 0, 0); /* set for ptrace - caught by csh */
812 kill (getpid (), SIGQUIT);
813
814#else /* No SIGTSTP or USG_JOBCTRL */
815
816/* On a system where suspending is not implemented,
817 instead fork a subshell and let it talk directly to the terminal
818 while we wait. */
a0932daa
KH		 819 sys_subshell ();
820
821#endif /* no USG_JOBCTRL */
822#endif /* no SIGTSTP */
823#endif /* not VMS */
824}
825
826/* Fork a subshell. */
827
e0f712ba 828#ifndef MAC_OS8
08633194 829void
a0932daa
KH		 830sys_subshell ()
831{
832#ifndef VMS
ad00c243 833#ifdef DOS_NT /* Demacs 1.1.2 91/10/20 Manabu Higashida */
a0932daa
KH		 834 int st;
835 char oldwd[MAXPATHLEN+1]; /* Fixed length is safe on MSDOS. */
836#endif
efa04277 837 int pid;
86a5659e 838 struct save_signal saved_handlers[5];
efa04277
RS		 839 Lisp_Object dir;
840 unsigned char *str = 0;
841 int len;
86a5659e
JB		 842
843 saved_handlers[0].code = SIGINT;
844 saved_handlers[1].code = SIGQUIT;
845 saved_handlers[2].code = SIGTERM;
846#ifdef SIGIO
847 saved_handlers[3].code = SIGIO;
848 saved_handlers[4].code = 0;
849#else
850 saved_handlers[3].code = 0;
851#endif
852
efa04277
RS		 853 /* Mentioning current_buffer->buffer would mean including buffer.h,
854 which somehow wedges the hp compiler. So instead... */
855
856 dir = intern ("default-directory");
0e7e7a58 857 if (NILP (Fboundp (dir)))
efa04277
RS		 858 goto xyzzy;
859 dir = Fsymbol_value (dir);
914e81a2 860 if (!STRINGP (dir))
efa04277
RS		 861 goto xyzzy;
862
863 dir = expand_and_dir_to_file (Funhandled_file_name_directory (dir), Qnil);
d5db4077
KR		 864 str = (unsigned char *) alloca (SCHARS (dir) + 2);
865 len = SCHARS (dir);
866 bcopy (SDATA (dir), str, len);
efa04277
RS		 867 if (str[len - 1] != '/') str[len++] = '/';
868 str[len] = 0;
869 xyzzy:
870
ad00c243 871#ifdef DOS_NT
7964ba9e 872 pid = 0;
718ca3cf
RS		 873#if __DJGPP__ > 1
874 save_signal_handlers (saved_handlers);
875 synch_process_alive = 1;
876#endif /* __DJGPP__ > 1 */
177c0ea7 877#else
efa04277 878 pid = vfork ();
86a5659e
JB		 879 if (pid == -1)
880 error ("Can't spawn subshell");
7964ba9e
RS		 881#endif
882
86a5659e
JB		 883 if (pid == 0)
884 {
7964ba9e 885 char *sh = 0;
86a5659e 886
ad00c243 887#ifdef DOS_NT /* MW, Aug 1993 */
207bdbdb 888 getwd (oldwd);
7964ba9e
RS		 889 if (sh == 0)
890 sh = (char *) egetenv ("SUSPEND"); /* KFS, 1994-12-14 */
207bdbdb 891#endif
7964ba9e
RS		 892 if (sh == 0)
893 sh = (char *) egetenv ("SHELL");
86a5659e
JB		 894 if (sh == 0)
895 sh = "sh";
207bdbdb 896
86a5659e 897 /* Use our buffer's default directory for the subshell. */
efa04277 898 if (str)
074c438c 899 chdir ((char *) str);
efa04277 900
86a5659e
JB		 901#ifdef subprocesses
902 close_process_descs (); /* Close Emacs's pipes/ptys */
903#endif
1593c2fe 904
6f8b4d01 905#ifdef SET_EMACS_PRIORITY
1593c2fe 906 {
31ade731 907 extern EMACS_INT emacs_priority;
1593c2fe 908
6f8b4d01 909 if (emacs_priority < 0)
1593c2fe
JB		 910 nice (-emacs_priority);
911 }
912#endif
913
fe03522b 914#ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */
c0917202 915 {
48178f9a
EZ		 916 char *epwd = getenv ("PWD");
917 char old_pwd[MAXPATHLEN+1+4];
c0917202
EZ		 918
919 /* If PWD is set, pass it with corrected value. */
48178f9a 920 if (epwd)
c0917202 921 {
48178f9a 922 strcpy (old_pwd, epwd);
c0917202
EZ		 923 if (str[len - 1] == '/')
924 str[len - 1] = '\0';
925 setenv ("PWD", str, 1);
926 }
927 st = system (sh);
928 chdir (oldwd);
48178f9a 929 if (epwd)
c0917202
EZ		 930 putenv (old_pwd); /* restore previous value */
931 }
7964ba9e 932#if 0 /* This is also reported if last command executed in subshell failed, KFS */
207bdbdb 933 if (st)
fe03522b 934 report_file_error ("Can't execute subshell", Fcons (build_string (sh), Qnil));
7964ba9e 935#endif
207bdbdb 936#else /* not MSDOS */
fe03522b 937#ifdef WINDOWSNT
fe03522b
RS		 938 /* Waits for process completion */
939 pid = _spawnlp (_P_WAIT, sh, sh, NULL);
ad00c243 940 chdir (oldwd);
fe03522b
RS		 941 if (pid == -1)
942 write (1, "Can't execute subshell", 22);
fe03522b 943#else /* not WINDOWSNT */
e120ea40 944 execlp (sh, sh, (char *) 0);
86a5659e
JB		 945 write (1, "Can't execute subshell", 22);
946 _exit (1);
fe03522b 947#endif /* not WINDOWSNT */
207bdbdb 948#endif /* not MSDOS */
86a5659e
JB		 949 }
950
718ca3cf
RS		 951 /* Do this now if we did not do it before. */
952#if !defined (MSDOS) || __DJGPP__ == 1
86a5659e 953 save_signal_handlers (saved_handlers);
ffafc793 954 synch_process_alive = 1;
718ca3cf
RS		 955#endif
956
ad00c243 957#ifndef DOS_NT
86a5659e 958 wait_for_termination (pid);
7964ba9e 959#endif
86a5659e 960 restore_signal_handlers (saved_handlers);
718ca3cf 961 synch_process_alive = 0;
a0932daa 962#endif /* !VMS */
86a5659e 963}
e0f712ba 964#endif /* !MAC_OS8 */
86a5659e 965
35a05cca 966static void
86a5659e
JB		 967save_signal_handlers (saved_handlers)
968 struct save_signal *saved_handlers;
969{
970 while (saved_handlers->code)
971 {
508b171c 972 saved_handlers->handler
35a05cca 973 = (SIGTYPE (*) P_ ((int))) signal (saved_handlers->code, SIG_IGN);
86a5659e
JB		 974 saved_handlers++;
975 }
976}
977
35a05cca 978static void
86a5659e
JB		 979restore_signal_handlers (saved_handlers)
980 struct save_signal *saved_handlers;
981{
982 while (saved_handlers->code)
983 {
984 signal (saved_handlers->code, saved_handlers->handler);
985 saved_handlers++;
986 }
987}
988\f
989#ifdef F_SETFL
990
991int old_fcntl_flags;
992
08633194 993void
23dab951
RS		 994init_sigio (fd)
995 int fd;
86a5659e
JB		 996{
997#ifdef FASYNC
23dab951
RS		 998 old_fcntl_flags = fcntl (fd, F_GETFL, 0) & ~FASYNC;
999 fcntl (fd, F_SETFL, old_fcntl_flags | FASYNC);
86a5659e 1000#endif
23dab951 1001 interrupts_deferred = 0;
86a5659e
JB		 1002}
1003
590034f9 1004void
86a5659e
JB		 1005reset_sigio ()
1006{
1007 unrequest_sigio ();
1008}
1009
eb8c3be9 1010#ifdef FASYNC /* F_SETFL does not imply existence of FASYNC */
86a5659e 1011
08633194 1012void
86a5659e
JB		 1013request_sigio ()
1014{
23dab951
RS		 1015 if (read_socket_hook)
1016 return;
1017
86a5659e 1018#ifdef SIGWINCH
e065a56e 1019 sigunblock (sigmask (SIGWINCH));
86a5659e 1020#endif
64e971c3 1021 fcntl (input_fd, F_SETFL, old_fcntl_flags | FASYNC);
86a5659e
JB		 1022
1023 interrupts_deferred = 0;
1024}
1025
08633194 1026void
86a5659e
JB		 1027unrequest_sigio ()
1028{
23dab951
RS		 1029 if (read_socket_hook)
1030 return;
1031
86a5659e 1032#ifdef SIGWINCH
e065a56e 1033 sigblock (sigmask (SIGWINCH));
86a5659e 1034#endif
64e971c3 1035 fcntl (input_fd, F_SETFL, old_fcntl_flags);
86a5659e
JB		 1036 interrupts_deferred = 1;
1037}
1038
1039#else /* no FASYNC */
1040#ifdef STRIDE /* Stride doesn't have FASYNC - use FIOASYNC */
1041
08633194 1042void
86a5659e
JB		 1043request_sigio ()
1044{
1045 int on = 1;
23dab951
RS		 1046
1047 if (read_socket_hook)
1048 return;
1049
64e971c3 1050 ioctl (input_fd, FIOASYNC, &on);
86a5659e
JB		 1051 interrupts_deferred = 0;
1052}
1053
08633194 1054void
86a5659e
JB		 1055unrequest_sigio ()
1056{
1057 int off = 0;
1058
23dab951
RS		 1059 if (read_socket_hook)
1060 return;
1061
64e971c3 1062 ioctl (input_fd, FIOASYNC, &off);
86a5659e
JB		 1063 interrupts_deferred = 1;
1064}
1065
1066#else /* not FASYNC, not STRIDE */
177c0ea7 1067
25ab68af
RS		 1068#ifdef _CX_UX
1069
1070#include <termios.h>
1071
08633194 1072void
25ab68af
RS		 1073request_sigio ()
1074{
1075 int on = 1;
1076 sigset_t st;
1077
23dab951
RS		 1078 if (read_socket_hook)
1079 return;
1080
c4ea52a6
RS		 1081 sigemptyset (&st);
1082 sigaddset (&st, SIGIO);
25ab68af
RS		 1083 ioctl (input_fd, FIOASYNC, &on);
1084 interrupts_deferred = 0;
c4ea52a6 1085 sigprocmask (SIG_UNBLOCK, &st, (sigset_t *)0);
25ab68af
RS		 1086}
1087
08633194 1088void
25ab68af
RS		 1089unrequest_sigio ()
1090{
1091 int off = 0;
1092
23dab951
RS		 1093 if (read_socket_hook)
1094 return;
1095
25ab68af
RS		 1096 ioctl (input_fd, FIOASYNC, &off);
1097 interrupts_deferred = 1;
1098}
1099
1100#else /* ! _CX_UX */
feb67dfe 1101#ifndef MSDOS
25ab68af 1102
08633194 1103void
86a5659e
JB		 1104request_sigio ()
1105{
23dab951
RS		 1106 if (read_socket_hook)
1107 return;
1108
86a5659e
JB		 1109 croak ("request_sigio");
1110}
177c0ea7 1111
08633194 1112void
86a5659e
JB		 1113unrequest_sigio ()
1114{
23dab951
RS		 1115 if (read_socket_hook)
1116 return;
1117
86a5659e
JB		 1118 croak ("unrequest_sigio");
1119}
feb67dfe
EZ		 1120
1121#endif /* MSDOS */
25ab68af 1122#endif /* _CX_UX */
86a5659e
JB		 1123#endif /* STRIDE */
1124#endif /* FASYNC */
1125#endif /* F_SETFL */
1126\f
9ae8f997
JB		 1127/* Saving and restoring the process group of Emacs's terminal. */
1128
0ba73609 1129#ifdef BSD_PGRPS
9ae8f997
JB		 1130
1131/* The process group of which Emacs was a member when it initially
1132 started.
1133
1134 If Emacs was in its own process group (i.e. inherited_pgroup ==
1135 getpid ()), then we know we're running under a shell with job
1136 control (Emacs would never be run as part of a pipeline).
1137 Everything is fine.
1138
1139 If Emacs was not in its own process group, then we know we're
1140 running under a shell (or a caller) that doesn't know how to
1141 separate itself from Emacs (like sh). Emacs must be in its own
1142 process group in order to receive SIGIO correctly. In this
1143 situation, we put ourselves in our own pgroup, forcibly set the
1144 tty's pgroup to our pgroup, and make sure to restore and reinstate
1145 the tty's pgroup just like any other terminal setting. If
1146 inherited_group was not the tty's pgroup, then we'll get a
1147 SIGTTmumble when we try to change the tty's pgroup, and a CONT if
1148 it goes foreground in the future, which is what should happen. */
1149int inherited_pgroup;
1150
1151/* Split off the foreground process group to Emacs alone.
1152 When we are in the foreground, but not started in our own process
1153 group, redirect the TTY to point to our own process group. We need
1154 to be in our own process group to receive SIGIO properly. */
dfcf069d 1155void
9ae8f997
JB		 1156narrow_foreground_group ()
1157{
1158 int me = getpid ();
1159
1160 setpgrp (0, inherited_pgroup);
1161 if (inherited_pgroup != me)
64e971c3 1162 EMACS_SET_TTY_PGRP (input_fd, &me);
9ae8f997
JB		 1163 setpgrp (0, me);
1164}
1165
1166/* Set the tty to our original foreground group. */
dfcf069d 1167void
9ae8f997
JB		 1168widen_foreground_group ()
1169{
1170 if (inherited_pgroup != getpid ())
64e971c3 1171 EMACS_SET_TTY_PGRP (input_fd, &inherited_pgroup);
9ae8f997
JB		 1172 setpgrp (0, inherited_pgroup);
1173}
1174
0ba73609 1175#endif /* BSD_PGRPS */
9ae8f997 1176\f
68936329
JB		 1177/* Getting and setting emacs_tty structures. */
1178
1179/* Set *TC to the parameters associated with the terminal FD.
1180 Return zero if all's well, or -1 if we ran into an error we
1181 couldn't deal with. */
1182int
1183emacs_get_tty (fd, settings)
1184 int fd;
1185 struct emacs_tty *settings;
1186{
1187 /* Retrieve the primary parameters - baud rate, character size, etcetera. */
1188#ifdef HAVE_TCATTR
1189 /* We have those nifty POSIX tcmumbleattr functions. */
1d9f9f9e 1190 bzero (&settings->main, sizeof (settings->main));
68936329
JB		 1191 if (tcgetattr (fd, &settings->main) < 0)
1192 return -1;
1193
1194#else
1195#ifdef HAVE_TERMIO
1196 /* The SYSV-style interface? */
1197 if (ioctl (fd, TCGETA, &settings->main) < 0)
1198 return -1;
1199
1200#else
1201#ifdef VMS
1202 /* Vehemently Monstrous System? :-) */
1203 if (! (SYS$QIOW (0, fd, IO$_SENSEMODE, settings, 0, 0,
1204 &settings->main.class, 12, 0, 0, 0, 0)
1205 & 1))
1206 return -1;
1207
1208#else
fe03522b 1209#ifndef DOS_NT
68936329
JB		 1210 /* I give up - I hope you have the BSD ioctls. */
1211 if (ioctl (fd, TIOCGETP, &settings->main) < 0)
1212 return -1;
fe03522b 1213#endif /* not DOS_NT */
68936329
JB		 1214#endif
1215#endif
1216#endif
1217
1218 /* Suivant - Do we have to get struct ltchars data? */
50b8cf60 1219#ifdef HAVE_LTCHARS
68936329
JB		 1220 if (ioctl (fd, TIOCGLTC, &settings->ltchars) < 0)
1221 return -1;
1222#endif
1223
1224 /* How about a struct tchars and a wordful of lmode bits? */
50b8cf60 1225#ifdef HAVE_TCHARS
68936329
JB		 1226 if (ioctl (fd, TIOCGETC, &settings->tchars) < 0
1227 || ioctl (fd, TIOCLGET, &settings->lmode) < 0)
1228 return -1;
1229#endif
1230
1231 /* We have survived the tempest. */
1232 return 0;
1233}
1234
1235
1236/* Set the parameters of the tty on FD according to the contents of
394049ec 1237 *SETTINGS. If FLUSHP is non-zero, we discard input.
68936329 1238 Return 0 if all went well, and -1 if anything failed. */
394049ec 1239
68936329 1240int
394049ec 1241emacs_set_tty (fd, settings, flushp)
68936329
JB		 1242 int fd;
1243 struct emacs_tty *settings;
394049ec 1244 int flushp;
68936329
JB		 1245{
1246 /* Set the primary parameters - baud rate, character size, etcetera. */
1247#ifdef HAVE_TCATTR
e6cc3307 1248 int i;
68936329
JB		 1249 /* We have those nifty POSIX tcmumbleattr functions.
1250 William J. Smith <wjs@wiis.wang.com> writes:
c4ea52a6 1251 "POSIX 1003.1 defines tcsetattr to return success if it was
68936329
JB		 1252 able to perform any of the requested actions, even if some
1253 of the requested actions could not be performed.
1254 We must read settings back to ensure tty setup properly.
1255 AIX requires this to keep tty from hanging occasionally." */
eb8c3be9 1256 /* This make sure that we don't loop indefinitely in here. */
e6cc3307 1257 for (i = 0 ; i < 10 ; i++)
394049ec 1258 if (tcsetattr (fd, flushp ? TCSAFLUSH : TCSADRAIN, &settings->main) < 0)
68936329
JB		 1259 {
1260 if (errno == EINTR)
1261 continue;
1262 else
1263 return -1;
1264 }
1265 else
1266 {
1267 struct termios new;
1268
1d9f9f9e 1269 bzero (&new, sizeof (new));
68936329
JB		 1270 /* Get the current settings, and see if they're what we asked for. */
1271 tcgetattr (fd, &new);
e6cc3307
RS		 1272 /* We cannot use memcmp on the whole structure here because under
1273 * aix386 the termios structure has some reserved field that may
1274 * not be filled in.
1275 */
1276 if ( new.c_iflag == settings->main.c_iflag
1277 && new.c_oflag == settings->main.c_oflag
1278 && new.c_cflag == settings->main.c_cflag
1279 && new.c_lflag == settings->main.c_lflag
c4ea52a6 1280 && memcmp (new.c_cc, settings->main.c_cc, NCCS) == 0)
68936329 1281 break;
e6cc3307
RS		 1282 else
1283 continue;
68936329
JB		 1284 }
1285
1286#else
1287#ifdef HAVE_TERMIO
1288 /* The SYSV-style interface? */
394049ec 1289 if (ioctl (fd, flushp ? TCSETAF : TCSETAW, &settings->main) < 0)
68936329
JB		 1290 return -1;
1291
1292#else
1293#ifdef VMS
1294 /* Vehemently Monstrous System? :-) */
1295 if (! (SYS$QIOW (0, fd, IO$_SETMODE, &input_iosb, 0, 0,
1296 &settings->main.class, 12, 0, 0, 0, 0)
1297 & 1))
1298 return -1;
1299
1300#else
fe03522b 1301#ifndef DOS_NT
68936329 1302 /* I give up - I hope you have the BSD ioctls. */
394049ec 1303 if (ioctl (fd, (flushp) ? TIOCSETP : TIOCSETN, &settings->main) < 0)
68936329 1304 return -1;
fe03522b 1305#endif /* not DOS_NT */
68936329
JB		 1306
1307#endif
1308#endif
1309#endif
1310
1311 /* Suivant - Do we have to get struct ltchars data? */
50b8cf60 1312#ifdef HAVE_LTCHARS
68936329
JB		 1313 if (ioctl (fd, TIOCSLTC, &settings->ltchars) < 0)
1314 return -1;
1315#endif
1316
1317 /* How about a struct tchars and a wordful of lmode bits? */
50b8cf60 1318#ifdef HAVE_TCHARS
68936329
JB		 1319 if (ioctl (fd, TIOCSETC, &settings->tchars) < 0
1320 || ioctl (fd, TIOCLSET, &settings->lmode) < 0)
1321 return -1;
1322#endif
177c0ea7 1323
68936329
JB		 1324 /* We have survived the tempest. */
1325 return 0;
1326}
1327
1328\f
91bac16a
JB		 1329/* The initial tty mode bits */
1330struct emacs_tty old_tty;
86a5659e 1331
7e32a4fb
KH		 1332/* 1 if we have been through init_sys_modes. */
1333int term_initted;
1334
1335/* 1 if outer tty status has been recorded. */
1336int old_tty_valid;
86a5659e 1337
91bac16a
JB		 1338#ifdef BSD4_1
1339/* BSD 4.1 needs to keep track of the lmode bits in order to start
1340 sigio. */
1341int lmode;
1342#endif
1343
46f2fdac 1344#ifndef F_SETOWN_BUG
86a5659e
JB		 1345#ifdef F_SETOWN
1346int old_fcntl_owner;
1347#endif /* F_SETOWN */
46f2fdac 1348#endif /* F_SETOWN_BUG */
86a5659e 1349
86a5659e
JB		 1350/* This may also be defined in stdio,
1351 but if so, this does no harm,
1352 and using the same name avoids wasting the other one's space. */
1353
6a0d0ed3
KH		 1354#ifdef nec_ews_svr4
1355extern char *_sobuf ;
1356#else
86a5659e
JB		 1357#if defined (USG) || defined (DGUX)
1358unsigned char _sobuf[BUFSIZ+8];
1359#else
1360char _sobuf[BUFSIZ];
1361#endif
6a0d0ed3 1362#endif
177c0ea7 1363
50b8cf60 1364#ifdef HAVE_LTCHARS
86a5659e
JB		 1365static struct ltchars new_ltchars = {-1,-1,-1,-1,-1,-1};
1366#endif
50b8cf60 1367#ifdef HAVE_TCHARS
4ec5cb58 1368static struct tchars new_tchars = {-1,-1,-1,-1,-1,-1};
177c0ea7 1369#endif
86a5659e 1370
08633194 1371void
86a5659e
JB		 1372init_sys_modes ()
1373{
91bac16a
JB		 1374 struct emacs_tty tty;
1375
e0f712ba 1376#ifdef MAC_OS8
1a578e9b 1377/* cus-start.el complains if delete-exited-processes is not defined */
c4ea52a6
RS		 1378#ifndef subprocesses
1379 DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes,
dfe45eff
PJ		 1380 doc: /* *Non-nil means delete processes immediately when they exit.
1381nil means don't delete them until `list-processes' is run. */);
c4ea52a6
RS		 1382 delete_exited_processes = 0;
1383#endif
e0f712ba 1384#endif /* MAC_OS8 */
c4ea52a6 1385
86a5659e
JB		 1386#ifdef VMS
1387#if 0
1388 static int oob_chars[2] = {0, 1 << 7}; /* catch C-g's */
1389 extern int (*interrupt_signal) ();
1390#endif
1391#endif
1392
4ec5cb58
RS		 1393 Vtty_erase_char = Qnil;
1394
86a5659e
JB		 1395 if (noninteractive)
1396 return;
1397
1398#ifdef VMS
1399 if (!input_ef)
1400 input_ef = get_kbd_event_flag ();
1401 /* LIB$GET_EF (&input_ef); */
1402 SYS$CLREF (input_ef);
1403 waiting_for_ast = 0;
1404 if (!timer_ef)
1405 timer_ef = get_timer_event_flag ();
1406 /* LIB$GET_EF (&timer_ef); */
1407 SYS$CLREF (timer_ef);
210b2b4f 1408#if 0
86a5659e
JB		 1409 if (!process_ef)
1410 {
1411 LIB$GET_EF (&process_ef);
1412 SYS$CLREF (process_ef);
1413 }
1414 if (input_ef / 32 != process_ef / 32)
1415 croak ("Input and process event flags in different clusters.");
210b2b4f 1416#endif
86a5659e 1417 if (input_ef / 32 != timer_ef / 32)
210b2b4f
JB		 1418 croak ("Input and timer event flags in different clusters.");
1419#if 0
86a5659e
JB		 1420 input_eflist = ((unsigned) 1 << (input_ef % 32)) |
1421 ((unsigned) 1 << (process_ef % 32));
210b2b4f 1422#endif
86a5659e
JB		 1423 timer_eflist = ((unsigned) 1 << (input_ef % 32)) |
1424 ((unsigned) 1 << (timer_ef % 32));
86a5659e
JB		 1425#ifndef VMS4_4
1426 sys_access_reinit ();
1427#endif
86a5659e 1428#endif /* not VMS */
91bac16a 1429
0ba73609 1430#ifdef BSD_PGRPS
9ae8f997
JB		 1431 if (! read_socket_hook && EQ (Vwindow_system, Qnil))
1432 narrow_foreground_group ();
1433#endif
1434
23cafe43 1435#ifdef HAVE_WINDOW_SYSTEM
87485d6f
MW		 1436 /* Emacs' window system on MSDOG uses the `internal terminal' and therefore
1437 needs the initialization code below. */
86a5659e 1438 if (!read_socket_hook && EQ (Vwindow_system, Qnil))
87485d6f 1439#endif
86a5659e 1440 {
23dab951
RS		 1441 EMACS_GET_TTY (input_fd, &old_tty);
1442
7e32a4fb
KH		 1443 old_tty_valid = 1;
1444
91bac16a 1445 tty = old_tty;
86a5659e 1446
31be8d24 1447#if defined (HAVE_TERMIO) || defined (HAVE_TERMIOS)
2e34157c 1448 XSETINT (Vtty_erase_char, old_tty.main.c_cc[VERASE]);
4ec5cb58 1449
421dd92f
RS		 1450#ifdef DGUX
1451 /* This allows meta to be sent on 8th bit. */
1452 tty.main.c_iflag &= ~INPCK; /* don't check input for parity */
1453#endif
91bac16a
JB		 1454 tty.main.c_iflag |= (IGNBRK); /* Ignore break condition */
1455 tty.main.c_iflag &= ~ICRNL; /* Disable map of CR to NL on input */
7f371164
RS		 1456#ifdef INLCR /* I'm just being cautious,
1457 since I can't check how widespread INLCR is--rms. */
1458 tty.main.c_iflag &= ~INLCR; /* Disable map of NL to CR on input */
1459#endif
86a5659e 1460#ifdef ISTRIP
91bac16a 1461 tty.main.c_iflag &= ~ISTRIP; /* don't strip 8th bit on input */
86a5659e 1462#endif
91bac16a
JB		 1463 tty.main.c_lflag &= ~ECHO; /* Disable echo */
1464 tty.main.c_lflag &= ~ICANON; /* Disable erase/kill processing */
e2b40c23 1465#ifdef IEXTEN
b26bc18b 1466 tty.main.c_lflag &= ~IEXTEN; /* Disable other editing characters. */
e2b40c23 1467#endif
91bac16a 1468 tty.main.c_lflag |= ISIG; /* Enable signals */
86a5659e
JB		 1469 if (flow_control)
1470 {
91bac16a 1471 tty.main.c_iflag |= IXON; /* Enable start/stop output control */
86a5659e 1472#ifdef IXANY
91bac16a 1473 tty.main.c_iflag &= ~IXANY;
86a5659e
JB		 1474#endif /* IXANY */
1475 }
1476 else
91bac16a 1477 tty.main.c_iflag &= ~IXON; /* Disable start/stop output control */
177c0ea7 1478 tty.main.c_oflag &= ~ONLCR; /* Disable map of NL to CR-NL
91bac16a
JB		 1479 on output */
1480 tty.main.c_oflag &= ~TAB3; /* Disable tab expansion */
86a5659e
JB		 1481#ifdef CS8
1482 if (meta_key)
1483 {
91bac16a
JB		 1484 tty.main.c_cflag |= CS8; /* allow 8th bit on input */
1485 tty.main.c_cflag &= ~PARENB;/* Don't check parity */
86a5659e
JB		 1486 }
1487#endif
91bac16a 1488 tty.main.c_cc[VINTR] = quit_char; /* C-g (usually) gives SIGINT */
86a5659e
JB		 1489 /* Set up C-g for both SIGQUIT and SIGINT.
1490 We don't know which we will get, but we handle both alike
1491 so which one it really gives us does not matter. */
91bac16a
JB		 1492 tty.main.c_cc[VQUIT] = quit_char;
1493 tty.main.c_cc[VMIN] = 1; /* Input should wait for at least 1 char */
1494 tty.main.c_cc[VTIME] = 0; /* no matter how long that takes. */
86a5659e 1495#ifdef VSWTCH
e2b40c23 1496 tty.main.c_cc[VSWTCH] = CDISABLE; /* Turn off shell layering use
91bac16a 1497 of C-z */
86a5659e 1498#endif /* VSWTCH */
c179a6d1 1499
86a5659e 1500#if defined (mips) || defined (HAVE_TCATTR)
86a5659e 1501#ifdef VSUSP
e2b40c23 1502 tty.main.c_cc[VSUSP] = CDISABLE; /* Turn off mips handling of C-z. */
86a5659e
JB		 1503#endif /* VSUSP */
1504#ifdef V_DSUSP
e2b40c23 1505 tty.main.c_cc[V_DSUSP] = CDISABLE; /* Turn off mips handling of C-y. */
86a5659e 1506#endif /* V_DSUSP */
e2b40c23
RS		 1507#ifdef VDSUSP /* Some systems have VDSUSP, some have V_DSUSP. */
1508 tty.main.c_cc[VDSUSP] = CDISABLE;
1509#endif /* VDSUSP */
92c995de
RS		 1510#ifdef VLNEXT
1511 tty.main.c_cc[VLNEXT] = CDISABLE;
1512#endif /* VLNEXT */
1513#ifdef VREPRINT
1514 tty.main.c_cc[VREPRINT] = CDISABLE;
1515#endif /* VREPRINT */
1516#ifdef VWERASE
1517 tty.main.c_cc[VWERASE] = CDISABLE;
1518#endif /* VWERASE */
1519#ifdef VDISCARD
1520 tty.main.c_cc[VDISCARD] = CDISABLE;
1521#endif /* VDISCARD */
c179a6d1
RS		 1522
1523 if (flow_control)
1524 {
421dd92f 1525#ifdef VSTART
c179a6d1 1526 tty.main.c_cc[VSTART] = '\021';
421dd92f
RS		 1527#endif /* VSTART */
1528#ifdef VSTOP
c179a6d1 1529 tty.main.c_cc[VSTOP] = '\023';
421dd92f 1530#endif /* VSTOP */
c179a6d1
RS		 1531 }
1532 else
1533 {
1534#ifdef VSTART
1535 tty.main.c_cc[VSTART] = CDISABLE;
1536#endif /* VSTART */
1537#ifdef VSTOP
1538 tty.main.c_cc[VSTOP] = CDISABLE;
1539#endif /* VSTOP */
1540 }
86a5659e 1541#endif /* mips or HAVE_TCATTR */
c179a6d1 1542
441f6399 1543#ifdef SET_LINE_DISCIPLINE
ea5a0917 1544 /* Need to explicitly request TERMIODISC line discipline or
441f6399
RS		 1545 Ultrix's termios does not work correctly. */
1546 tty.main.c_line = SET_LINE_DISCIPLINE;
1547#endif
86a5659e
JB		 1548#ifdef AIX
1549#ifndef IBMR2AIX
441f6399 1550 /* AIX enhanced edit loses NULs, so disable it. */
91bac16a
JB		 1551 tty.main.c_line = 0;
1552 tty.main.c_iflag &= ~ASCEDIT;
86a5659e 1553#else
fa51fa32
KS		 1554 tty.main.c_cc[VSTRT] = CDISABLE;
1555 tty.main.c_cc[VSTOP] = CDISABLE;
1556 tty.main.c_cc[VSUSP] = CDISABLE;
1557 tty.main.c_cc[VDSUSP] = CDISABLE;
86a5659e 1558#endif /* IBMR2AIX */
ac567c95
RS		 1559 if (flow_control)
1560 {
1561#ifdef VSTART
1562 tty.main.c_cc[VSTART] = '\021';
1563#endif /* VSTART */
1564#ifdef VSTOP
1565 tty.main.c_cc[VSTOP] = '\023';
1566#endif /* VSTOP */
1567 }
86a5659e
JB		 1568 /* Also, PTY overloads NUL and BREAK.
1569 don't ignore break, but don't signal either, so it looks like NUL.
1570 This really serves a purpose only if running in an XTERM window
1571 or via TELNET or the like, but does no harm elsewhere. */
91bac16a
JB		 1572 tty.main.c_iflag &= ~IGNBRK;
1573 tty.main.c_iflag &= ~BRKINT;
86a5659e
JB		 1574#endif
1575#else /* if not HAVE_TERMIO */
1576#ifdef VMS
91bac16a 1577 tty.main.tt_char |= TT$M_NOECHO;
86a5659e 1578 if (meta_key)
986ffb24 1579 tty.main.tt_char |= TT$M_EIGHTBIT;
86a5659e 1580 if (flow_control)
91bac16a 1581 tty.main.tt_char |= TT$M_TTSYNC;
86a5659e 1582 else
91bac16a
JB		 1583 tty.main.tt_char &= ~TT$M_TTSYNC;
1584 tty.main.tt2_char |= TT2$M_PASTHRU | TT2$M_XON;
86a5659e 1585#else /* not VMS (BSD, that is) */
fe03522b 1586#ifndef DOS_NT
a61e51f0 1587 XSETINT (Vtty_erase_char, tty.main.sg_erase);
91bac16a 1588 tty.main.sg_flags &= ~(ECHO | CRMOD | XTABS);
86a5659e 1589 if (meta_key)
91bac16a
JB		 1590 tty.main.sg_flags |= ANYP;
1591 tty.main.sg_flags |= interrupt_input ? RAW : CBREAK;
fe03522b 1592#endif /* not DOS_NT */
86a5659e
JB		 1593#endif /* not VMS (BSD, that is) */
1594#endif /* not HAVE_TERMIO */
1595
91bac16a
JB		 1596 /* If going to use CBREAK mode, we must request C-g to interrupt
1597 and turn off start and stop chars, etc. If not going to use
1598 CBREAK mode, do this anyway so as to turn off local flow
1599 control for user coming over network on 4.2; in this case,
1600 only t_stopc and t_startc really matter. */
1601#ifndef HAVE_TERMIO
50b8cf60 1602#ifdef HAVE_TCHARS
91bac16a
JB		 1603 /* Note: if not using CBREAK mode, it makes no difference how we
1604 set this */
1605 tty.tchars = new_tchars;
1606 tty.tchars.t_intrc = quit_char;
1607 if (flow_control)
1608 {
1609 tty.tchars.t_startc = '\021';
1610 tty.tchars.t_stopc = '\023';
1611 }
1612
91bac16a 1613 tty.lmode = LDECCTQ | LLITOUT | LPASS8 | LNOFLSH | old_tty.lmode;
37fd7901
JB		 1614#ifdef ultrix
1615 /* Under Ultrix 4.2a, leaving this out doesn't seem to hurt
1616 anything, and leaving it in breaks the meta key. Go figure. */
1617 tty.lmode &= ~LLITOUT;
1618#endif
177c0ea7 1619
91bac16a
JB		 1620#ifdef BSD4_1
1621 lmode = tty.lmode;
1622#endif
1623
50b8cf60 1624#endif /* HAVE_TCHARS */
91bac16a
JB		 1625#endif /* not HAVE_TERMIO */
1626
50b8cf60 1627#ifdef HAVE_LTCHARS
91bac16a 1628 tty.ltchars = new_ltchars;
50b8cf60 1629#endif /* HAVE_LTCHARS */
207bdbdb 1630#ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida, MW Aug 1993 */
87485d6f
MW		 1631 if (!term_initted)
1632 internal_terminal_init ();
207bdbdb
RS		 1633 dos_ttraw ();
1634#endif
91bac16a
JB		 1635
1636 EMACS_SET_TTY (input_fd, &tty, 0);
86a5659e
JB		 1637
1638 /* This code added to insure that, if flow-control is not to be used,
0137dbf7 1639 we have an unlocked terminal at the start. */
91bac16a 1640
86a5659e 1641#ifdef TCXONC
64e971c3 1642 if (!flow_control) ioctl (input_fd, TCXONC, 1);
86a5659e
JB		 1643#endif
1644#ifndef APOLLO
1645#ifdef TIOCSTART
64e971c3 1646 if (!flow_control) ioctl (input_fd, TIOCSTART, 0);
86a5659e
JB		 1647#endif
1648#endif
1649
d228f207 1650#if defined (HAVE_TERMIOS) || defined (HPUX9)
51417996 1651#ifdef TCOON
d228f207
RS		 1652 if (!flow_control) tcflow (input_fd, TCOON);
1653#endif
51417996 1654#endif
d228f207 1655
b97ab886 1656#ifdef AIXHFT
86a5659e
JB		 1657 hft_init ();
1658#ifdef IBMR2AIX
1659 {
1660 /* IBM's HFT device usually thinks a ^J should be LF/CR. We need it
1661 to be only LF. This is the way that is done. */
1662 struct termio tty;
1663
1664 if (ioctl (1, HFTGETID, &tty) != -1)
1665 write (1, "\033[20l", 5);
1666 }
1667#endif
b97ab886 1668#endif /* AIXHFT */
86a5659e 1669
86a5659e
JB		 1670#ifdef VMS
1671/* Appears to do nothing when in PASTHRU mode.
91bac16a 1672 SYS$QIOW (0, input_fd, IO$_SETMODE|IO$M_OUTBAND, 0, 0, 0,
86a5659e
JB		 1673 interrupt_signal, oob_chars, 0, 0, 0, 0);
1674*/
1675 queue_kbd_input (0);
1676#endif /* VMS */
1677 }
1678
1679#ifdef F_SETFL
46f2fdac 1680#ifndef F_SETOWN_BUG
eb8c3be9 1681#ifdef F_GETOWN /* F_SETFL does not imply existence of F_GETOWN */
d6a9be45
RS		 1682 if (interrupt_input
1683 && ! read_socket_hook && EQ (Vwindow_system, Qnil))
86a5659e 1684 {
64e971c3
RS		 1685 old_fcntl_owner = fcntl (input_fd, F_GETOWN, 0);
1686 fcntl (input_fd, F_SETOWN, getpid ());
23dab951 1687 init_sigio (input_fd);
86a5659e
JB		 1688 }
1689#endif /* F_GETOWN */
46f2fdac 1690#endif /* F_SETOWN_BUG */
86a5659e
JB		 1691#endif /* F_SETFL */
1692
1693#ifdef BSD4_1
1694 if (interrupt_input)
23dab951 1695 init_sigio (input_fd);
86a5659e
JB		 1696#endif
1697
1698#ifdef VMS /* VMS sometimes has this symbol but lacks setvbuf. */
1699#undef _IOFBF
1700#endif
1701#ifdef _IOFBF
1702 /* This symbol is defined on recent USG systems.
1703 Someone says without this call USG won't really buffer the file
1704 even with a call to setbuf. */
074c438c 1705 setvbuf (stdout, (char *) _sobuf, _IOFBF, sizeof _sobuf);
86a5659e 1706#else
074c438c 1707 setbuf (stdout, (char *) _sobuf);
86a5659e 1708#endif
23cafe43 1709#ifdef HAVE_WINDOW_SYSTEM
c4295188
KS		 1710 /* Emacs' window system on MSDOG uses the `internal terminal' and therefore
1711 needs the initialization code below. */
ad00c243
GV		 1712 if (EQ (Vwindow_system, Qnil)
1713#ifndef WINDOWSNT
1714 /* When running in tty mode on NT/Win95, we have a read_socket
1715 hook, but still need the rest of the initialization code below. */
1716 && (! read_socket_hook)
1717#endif
1718 )
c4295188 1719#endif
4b311aaf
RS		 1720 set_terminal_modes ();
1721
045942b2
EZ		 1722 if (!term_initted
1723 && FRAMEP (Vterminal_frame)
1724 && FRAME_TERMCAP_P (XFRAME (Vterminal_frame)))
1725 init_frame_faces (XFRAME (Vterminal_frame));
1726
86a5659e
JB		 1727 if (term_initted && no_redraw_on_reenter)
1728 {
1729 if (display_completed)
1730 direct_output_forward_char (0);
1731 }
1732 else
1733 {
0137dbf7 1734 frame_garbaged = 1;
0137dbf7
JB		 1735 if (FRAMEP (Vterminal_frame))
1736 FRAME_GARBAGED_P (XFRAME (Vterminal_frame)) = 1;
86a5659e 1737 }
91bac16a 1738
86a5659e
JB		 1739 term_initted = 1;
1740}
1741
1742/* Return nonzero if safe to use tabs in output.
1743 At the time this is called, init_sys_modes has not been done yet. */
177c0ea7 1744
dfcf069d 1745int
86a5659e
JB		 1746tabs_safe_p ()
1747{
91bac16a
JB		 1748 struct emacs_tty tty;
1749
1750 EMACS_GET_TTY (input_fd, &tty);
1751 return EMACS_TTY_TABS_OK (&tty);
86a5659e 1752}
73d5358f 1753\f
86a5659e 1754/* Get terminal size from system.
73d5358f
RS		 1755 Store number of lines into *HEIGHTP and width into *WIDTHP.
1756 We store 0 if there's no valid information. */
86a5659e 1757
08633194 1758void
0137dbf7 1759get_frame_size (widthp, heightp)
86a5659e
JB		 1760 int *widthp, *heightp;
1761{
86a5659e 1762
86a5659e 1763#ifdef TIOCGWINSZ
91bac16a
JB		 1764
1765 /* BSD-style. */
86a5659e 1766 struct winsize size;
91bac16a
JB		 1767
1768 if (ioctl (input_fd, TIOCGWINSZ, &size) == -1)
1769 *widthp = *heightp = 0;
1770 else
1771 {
1772 *widthp = size.ws_col;
1773 *heightp = size.ws_row;
1774 }
1775
1776#else
1777#ifdef TIOCGSIZE
1778
1779 /* SunOS - style. */
177c0ea7 1780 struct ttysize size;
91bac16a
JB		 1781
1782 if (ioctl (input_fd, TIOCGSIZE, &size) == -1)
1783 *widthp = *heightp = 0;
1784 else
1785 {
1786 *widthp = size.ts_cols;
1787 *heightp = size.ts_lines;
1788 }
1789
1790#else
86a5659e 1791#ifdef VMS
91bac16a 1792
a72c2d97
TTN		 1793 /* Use a fresh channel since the current one may have stale info
1794 (for example, from prior to a suspend); and to avoid a dependency
1795 in the init sequence. */
1796 int chan;
91bac16a 1797 struct sensemode tty;
177c0ea7 1798
a72c2d97
TTN		 1799 SYS$ASSIGN (&input_dsc, &chan, 0, 0);
1800 SYS$QIOW (0, chan, IO$_SENSEMODE, &tty, 0, 0,
1801 &tty.class, 12, 0, 0, 0, 0);
1802 SYS$DASSGN (chan);
86a5659e
JB		 1803 *widthp = tty.scr_wid;
1804 *heightp = tty.scr_len;
91bac16a 1805
207bdbdb
RS		 1806#else
1807#ifdef MSDOS
1808 *widthp = ScreenCols ();
1809 *heightp = ScreenRows ();
86a5659e
JB		 1810#else /* system doesn't know size */
1811 *widthp = 0;
1812 *heightp = 0;
207bdbdb 1813#endif
91bac16a
JB		 1814
1815#endif /* not VMS */
1816#endif /* not SunOS-style */
1817#endif /* not BSD-style */
86a5659e 1818}
91bac16a 1819
73d5358f
RS		 1820/* Set the logical window size associated with descriptor FD
1821 to HEIGHT and WIDTH. This is used mainly with ptys. */
1822
1823int
1824set_window_size (fd, height, width)
1825 int fd, height, width;
1826{
1827#ifdef TIOCSWINSZ
1828
1829 /* BSD-style. */
1830 struct winsize size;
1831 size.ws_row = height;
1832 size.ws_col = width;
1833
1834 if (ioctl (fd, TIOCSWINSZ, &size) == -1)
1835 return 0; /* error */
1836 else
1837 return 1;
1838
1839#else
1840#ifdef TIOCSSIZE
1841
1842 /* SunOS - style. */
177c0ea7 1843 struct ttysize size;
73d5358f
RS		 1844 size.ts_lines = height;
1845 size.ts_cols = width;
1846
1847 if (ioctl (fd, TIOCGSIZE, &size) == -1)
1848 return 0;
1849 else
1850 return 1;
1851#else
1852 return -1;
1853#endif /* not SunOS-style */
1854#endif /* not BSD-style */
1855}
1856
86a5659e 1857\f
91bac16a 1858/* Prepare the terminal for exiting Emacs; move the cursor to the
0137dbf7 1859 bottom of the frame, turn off interrupt-driven I/O, etc. */
08633194 1860void
86a5659e
JB		 1861reset_sys_modes ()
1862{
2d064114 1863 struct frame *sf;
177c0ea7 1864
86a5659e
JB		 1865 if (noninteractive)
1866 {
1867 fflush (stdout);
1868 return;
1869 }
1870 if (!term_initted)
1871 return;
23cafe43 1872#ifdef HAVE_WINDOW_SYSTEM
87485d6f
MW		 1873 /* Emacs' window system on MSDOG uses the `internal terminal' and therefore
1874 needs the clean-up code below. */
ad00c243
GV		 1875 if (!EQ (Vwindow_system, Qnil)
1876#ifndef WINDOWSNT
1877 /* When running in tty mode on NT/Win95, we have a read_socket
1878 hook, but still need the rest of the clean-up code below. */
1879 || read_socket_hook
1880#endif
1881 )
86a5659e 1882 return;
87485d6f 1883#endif
2d064114 1884 sf = SELECTED_FRAME ();
90022f5a
KS		 1885 cursor_to (FRAME_LINES (sf) - 1, 0);
1886 clear_end_of_line (FRAME_COLS (sf));
86a5659e 1887 /* clear_end_of_line may move the cursor */
90022f5a 1888 cursor_to (FRAME_LINES (sf) - 1, 0);
b97ab886 1889#if defined (IBMR2AIX) && defined (AIXHFT)
86a5659e 1890 {
177c0ea7 1891 /* HFT devices normally use ^J as a LF/CR. We forced it to
86a5659e
JB		 1892 do the LF only. Now, we need to reset it. */
1893 struct termio tty;
1894
1895 if (ioctl (1, HFTGETID, &tty) != -1)
1896 write (1, "\033[20h", 5);
1897 }
1898#endif
1899
1900 reset_terminal_modes ();
1901 fflush (stdout);
2a633456 1902#ifdef BSD_SYSTEM
86a5659e
JB		 1903#ifndef BSD4_1
1904 /* Avoid possible loss of output when changing terminal modes. */
1905 fsync (fileno (stdout));
1906#endif
1907#endif
91bac16a 1908
86a5659e 1909#ifdef F_SETFL
46f2fdac 1910#ifndef F_SETOWN_BUG
eb8c3be9 1911#ifdef F_SETOWN /* F_SETFL does not imply existence of F_SETOWN */
86a5659e
JB		 1912 if (interrupt_input)
1913 {
1914 reset_sigio ();
64e971c3 1915 fcntl (input_fd, F_SETOWN, old_fcntl_owner);
86a5659e
JB		 1916 }
1917#endif /* F_SETOWN */
46f2fdac 1918#endif /* F_SETOWN_BUG */
a6b00318
KH		 1919#ifdef O_NDELAY
1920 fcntl (input_fd, F_SETFL, fcntl (input_fd, F_GETFL, 0) & ~O_NDELAY);
1921#endif
86a5659e
JB		 1922#endif /* F_SETFL */
1923#ifdef BSD4_1
1924 if (interrupt_input)
1925 reset_sigio ();
1926#endif /* BSD4_1 */
91bac16a 1927
7e32a4fb
KH		 1928 if (old_tty_valid)
1929 while (EMACS_SET_TTY (input_fd, &old_tty, 0) < 0 && errno == EINTR)
1930 ;
86a5659e 1931
207bdbdb
RS		 1932#ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */
1933 dos_ttcooked ();
1934#endif
1935
441f6399
RS		 1936#ifdef SET_LINE_DISCIPLINE
1937 /* Ultrix's termios *ignores* any line discipline except TERMIODISC.
1938 A different old line discipline is therefore not restored, yet.
1939 Restore the old line discipline by hand. */
1940 ioctl (0, TIOCSETD, &old_tty.main.c_line);
1941#endif
1942
b97ab886 1943#ifdef AIXHFT
86a5659e
JB		 1944 hft_reset ();
1945#endif
9ae8f997 1946
0ba73609 1947#ifdef BSD_PGRPS
9ae8f997
JB		 1948 widen_foreground_group ();
1949#endif
86a5659e
JB		 1950}
1951\f
1952#ifdef HAVE_PTYS
1953
1954/* Set up the proper status flags for use of a pty. */
1955
08633194 1956void
86a5659e
JB		 1957setup_pty (fd)
1958 int fd;
1959{
1960 /* I'm told that TOICREMOTE does not mean control chars
1961 "can't be sent" but rather that they don't have
1962 input-editing or signaling effects.
1963 That should be good, because we have other ways
1964 to do those things in Emacs.
1965 However, telnet mode seems not to work on 4.2.
1966 So TIOCREMOTE is turned off now. */
1967
1968 /* Under hp-ux, if TIOCREMOTE is turned on, some calls
1969 will hang. In particular, the "timeout" feature (which
1970 causes a read to return if there is no data available)
1971 does this. Also it is known that telnet mode will hang
1972 in such a way that Emacs must be stopped (perhaps this
1973 is the same problem).
177c0ea7 1974
86a5659e
JB		 1975 If TIOCREMOTE is turned off, then there is a bug in
1976 hp-ux which sometimes loses data. Apparently the
1977 code which blocks the master process when the internal
1978 buffer fills up does not work. Other than this,
1979 though, everything else seems to work fine.
177c0ea7 1980
86a5659e
JB		 1981 Since the latter lossage is more benign, we may as well
1982 lose that way. -- cph */
1983#ifdef FIONBIO
e20caf05 1984#if defined(SYSV_PTYS) || defined(UNIX98_PTYS)
86a5659e
JB		 1985 {
1986 int on = 1;
1987 ioctl (fd, FIONBIO, &on);
1988 }
1989#endif
1990#endif
1991#ifdef IBMRTAIX
1992 /* On AIX, the parent gets SIGHUP when a pty attached child dies. So, we */
1993 /* ignore SIGHUP once we've started a child on a pty. Note that this may */
1994 /* cause EMACS not to die when it should, i.e., when its own controlling */
1995 /* tty goes away. I've complained to the AIX developers, and they may */
1996 /* change this behavior, but I'm not going to hold my breath. */
1997 signal (SIGHUP, SIG_IGN);
1998#endif
1999}
2000#endif /* HAVE_PTYS */
2001\f
2002#ifdef VMS
2003
2004/* Assigning an input channel is done at the start of Emacs execution.
2005 This is called each time Emacs is resumed, also, but does nothing
2006 because input_chain is no longer zero. */
2007
dfcf069d 2008void
86a5659e
JB		 2009init_vms_input ()
2010{
2011 int status;
177c0ea7 2012
91bac16a 2013 if (input_fd == 0)
86a5659e 2014 {
91bac16a 2015 status = SYS$ASSIGN (&input_dsc, &input_fd, 0, 0);
86a5659e
JB		 2016 if (! (status & 1))
2017 LIB$STOP (status);
2018 }
2019}
2020
2021/* Deassigning the input channel is done before exiting. */
2022
dfcf069d 2023void
86a5659e
JB		 2024stop_vms_input ()
2025{
91bac16a 2026 return SYS$DASSGN (input_fd);
86a5659e
JB		 2027}
2028
2029short input_buffer;
2030
2031/* Request reading one character into the keyboard buffer.
2032 This is done as soon as the buffer becomes empty. */
2033
dfcf069d 2034void
86a5659e
JB		 2035queue_kbd_input ()
2036{
2037 int status;
210b2b4f
JB		 2038 extern kbd_input_ast ();
2039
86a5659e
JB		 2040 waiting_for_ast = 0;
2041 stop_input = 0;
91bac16a 2042 status = SYS$QIO (0, input_fd, IO$_READVBLK,
86a5659e
JB		 2043 &input_iosb, kbd_input_ast, 1,
2044 &input_buffer, 1, 0, terminator_mask, 0, 0);
2045}
2046
2047int input_count;
2048
2049/* Ast routine that is called when keyboard input comes in
2050 in accord with the SYS$QIO above. */
2051
dfcf069d 2052void
86a5659e
JB		 2053kbd_input_ast ()
2054{
2055 register int c = -1;
2056 int old_errno = errno;
ffd56f97 2057 extern EMACS_TIME *input_available_clear_time;
86a5659e
JB		 2058
2059 if (waiting_for_ast)
2060 SYS$SETEF (input_ef);
2061 waiting_for_ast = 0;
2062 input_count++;
2063#ifdef ASTDEBUG
2064 if (input_count == 25)
2065 exit (1);
2066 printf ("Ast # %d,", input_count);
2067 printf (" iosb = %x, %x, %x, %x",
2068 input_iosb.offset, input_iosb.status, input_iosb.termlen,
2069 input_iosb.term);
2070#endif
2071 if (input_iosb.offset)
2072 {
2073 c = input_buffer;
2074#ifdef ASTDEBUG
2075 printf (", char = 0%o", c);
2076#endif
2077 }
2078#ifdef ASTDEBUG
2079 printf ("\n");
2080 fflush (stdout);
2081 sleep (1);
2082#endif
2083 if (! stop_input)
2084 queue_kbd_input ();
2085 if (c >= 0)
2086 {
2087 struct input_event e;
50acda85
SM		 2088 EVENT_INIT (e);
2089
e43bd4f5 2090 e.kind = ASCII_KEYSTROKE_EVENT;
c81d47b4 2091 XSETINT (e.code, c);
2d064114 2092 e.frame_or_window = selected_frame;
86a5659e
JB		 2093 kbd_buffer_store_event (&e);
2094 }
ffd56f97
JB		 2095 if (input_available_clear_time)
2096 EMACS_SET_SECS_USECS (*input_available_clear_time, 0, 0);
86a5659e
JB		 2097 errno = old_errno;
2098}
2099
2100/* Wait until there is something in kbd_buffer. */
2101
dfcf069d 2102void
86a5659e
JB		 2103wait_for_kbd_input ()
2104{
2105 extern int have_process_input, process_exited;
2106
2107 /* If already something, avoid doing system calls. */
2108 if (detect_input_pending ())
2109 {
2110 return;
2111 }
2112 /* Clear a flag, and tell ast routine above to set it. */
2113 SYS$CLREF (input_ef);
2114 waiting_for_ast = 1;
2115 /* Check for timing error: ast happened while we were doing that. */
2116 if (!detect_input_pending ())
2117 {
2118 /* No timing error: wait for flag to be set. */
2119 set_waiting_for_input (0);
2120 SYS$WFLOR (input_ef, input_eflist);
61851c0e 2121 clear_waiting_for_input ();
86a5659e
JB		 2122 if (!detect_input_pending ())
2123 /* Check for subprocess input availability */
2124 {
2125 int dsp = have_process_input || process_exited;
2126
2127 SYS$CLREF (process_ef);
2128 if (have_process_input)
2129 process_command_input ();
2130 if (process_exited)
2131 process_exit ();
2132 if (dsp)
2133 {
2134 update_mode_lines++;
56b18525 2135 prepare_menu_bars ();
3007ebfb 2136 redisplay_preserve_echo_area (18);
86a5659e
JB		 2137 }
2138 }
2139 }
2140 waiting_for_ast = 0;
2141}
2142
2143/* Get rid of any pending QIO, when we are about to suspend
2144 or when we want to throw away pending input.
2145 We wait for a positive sign that the AST routine has run
2146 and therefore there is no I/O request queued when we return.
2147 SYS$SETAST is used to avoid a timing error. */
2148
dfcf069d 2149void
86a5659e
JB		 2150end_kbd_input ()
2151{
2152#ifdef ASTDEBUG
2153 printf ("At end_kbd_input.\n");
2154 fflush (stdout);
2155 sleep (1);
2156#endif
2157 if (LIB$AST_IN_PROG ()) /* Don't wait if suspending from kbd_buffer_store_event! */
2158 {
91bac16a 2159 SYS$CANCEL (input_fd);
86a5659e
JB		 2160 return;
2161 }
2162
2163 SYS$SETAST (0);
2164 /* Clear a flag, and tell ast routine above to set it. */
2165 SYS$CLREF (input_ef);
2166 waiting_for_ast = 1;
2167 stop_input = 1;
91bac16a 2168 SYS$CANCEL (input_fd);
86a5659e
JB		 2169 SYS$SETAST (1);
2170 SYS$WAITFR (input_ef);
2171 waiting_for_ast = 0;
2172}
2173
2174/* Wait for either input available or time interval expiry. */
2175
dfcf069d 2176void
86a5659e
JB		 2177input_wait_timeout (timeval)
2178 int timeval; /* Time to wait, in seconds */
2179{
2180 int time [2];
2181 static int zero = 0;
2182 static int large = -10000000;
2183
2184 LIB$EMUL (&timeval, &large, &zero, time); /* Convert to VMS format */
2185
2186 /* If already something, avoid doing system calls. */
2187 if (detect_input_pending ())
2188 {
2189 return;
2190 }
2191 /* Clear a flag, and tell ast routine above to set it. */
2192 SYS$CLREF (input_ef);
2193 waiting_for_ast = 1;
2194 /* Check for timing error: ast happened while we were doing that. */
2195 if (!detect_input_pending ())
2196 {
2197 /* No timing error: wait for flag to be set. */
2198 SYS$CANTIM (1, 0);
2199 if (SYS$SETIMR (timer_ef, time, 0, 1) & 1) /* Set timer */
2200 SYS$WFLOR (timer_ef, timer_eflist); /* Wait for timer expiry or input */
2201 }
2202 waiting_for_ast = 0;
2203}
2204
2205/* The standard `sleep' routine works some other way
2206 and it stops working if you have ever quit out of it.
2207 This one continues to work. */
2208
2209sys_sleep (timeval)
2210 int timeval;
2211{
2212 int time [2];
2213 static int zero = 0;
2214 static int large = -10000000;
177c0ea7 2215
86a5659e
JB		 2216 LIB$EMUL (&timeval, &large, &zero, time); /* Convert to VMS format */
2217
2218 SYS$CANTIM (1, 0);
2219 if (SYS$SETIMR (timer_ef, time, 0, 1) & 1) /* Set timer */
2220 SYS$WAITFR (timer_ef); /* Wait for timer expiry only */
2221}
2222
08633194 2223void
23dab951
RS		 2224init_sigio (fd)
2225 int fd;
86a5659e
JB		 2226{
2227 request_sigio ();
2228}
2229
2230reset_sigio ()
2231{
2232 unrequest_sigio ();
2233}
2234
08633194 2235void
86a5659e
JB		 2236request_sigio ()
2237{
2238 croak ("request sigio");
2239}
2240
08633194 2241void
86a5659e
JB		 2242unrequest_sigio ()
2243{
2244 croak ("unrequest sigio");
2245}
2246
2247#endif /* VMS */
2248\f
2249/* Note that VMS compiler won't accept defined (CANNOT_DUMP). */
2250#ifndef CANNOT_DUMP
2251#define NEED_STARTS
2252#endif
2253
2254#ifndef SYSTEM_MALLOC
2255#ifndef NEED_STARTS
2256#define NEED_STARTS
2257#endif
2258#endif
2259
2260#ifdef NEED_STARTS
2261/* Some systems that cannot dump also cannot implement these. */
2262
2263/*
2264 * Return the address of the start of the text segment prior to
2265 * doing an unexec. After unexec the return value is undefined.
2266 * See crt0.c for further explanation and _start.
2267 *
2268 */
2269
c0c9ac48 2270#if !(defined (__NetBSD__) && defined (__ELF__))
260fe597 2271#ifndef HAVE_TEXT_START
86a5659e
JB		 2272char *
2273start_of_text ()
2274{
2275#ifdef TEXT_START
2276 return ((char *) TEXT_START);
2277#else
2278#ifdef GOULD
2279 extern csrt ();
2280 return ((char *) csrt);
2281#else /* not GOULD */
2282 extern int _start ();
2283 return ((char *) _start);
2284#endif /* GOULD */
2285#endif /* TEXT_START */
2286}
260fe597 2287#endif /* not HAVE_TEXT_START */
c0c9ac48 2288#endif
86a5659e
JB		 2289
2290/*
2291 * Return the address of the start of the data segment prior to
2292 * doing an unexec. After unexec the return value is undefined.
2293 * See crt0.c for further information and definition of data_start.
2294 *
2295 * Apparently, on BSD systems this is etext at startup. On
2296 * USG systems (swapping) this is highly mmu dependent and
2297 * is also dependent on whether or not the program is running
2298 * with shared text. Generally there is a (possibly large)
2299 * gap between end of text and start of data with shared text.
2300 *
2301 * On Uniplus+ systems with shared text, data starts at a
2302 * fixed address. Each port (from a given oem) is generally
2303 * different, and the specific value of the start of data can
2304 * be obtained via the UniPlus+ specific "uvar" system call,
2305 * however the method outlined in crt0.c seems to be more portable.
2306 *
2307 * Probably what will have to happen when a USG unexec is available,
2308 * at least on UniPlus, is temacs will have to be made unshared so
2309 * that text and data are contiguous. Then once loadup is complete,
2310 * unexec will produce a shared executable where the data can be
ea5a0917 2311 * at the normal shared text boundary and the startofdata variable
86a5659e
JB		 2312 * will be patched by unexec to the correct value.
2313 *
2314 */
177c0ea7 2315
be3abfa2 2316#ifndef start_of_data
86a5659e
JB		 2317char *
2318start_of_data ()
2319{
2320#ifdef DATA_START
2321 return ((char *) DATA_START);
6c65530f
JB		 2322#else
2323#ifdef ORDINARY_LINK
2324 /*
2325 * This is a hack. Since we're not linking crt0.c or pre_crt0.c,
2326 * data_start isn't defined. We take the address of environ, which
2327 * is known to live at or near the start of the system crt0.c, and
2328 * we don't sweat the handful of bytes that might lose.
2329 */
2330 extern char **environ;
2331
c4ea52a6 2332 return ((char *) &environ);
86a5659e
JB		 2333#else
2334 extern int data_start;
2335 return ((char *) &data_start);
6c65530f
JB		 2336#endif /* ORDINARY_LINK */
2337#endif /* DATA_START */
86a5659e 2338}
be3abfa2 2339#endif /* start_of_data */
86a5659e 2340#endif /* NEED_STARTS (not CANNOT_DUMP or not SYSTEM_MALLOC) */
86a5659e 2341\f
c0c86835
KH		 2342/* init_system_name sets up the string for the Lisp function
2343 system-name to return. */
86a5659e
JB		 2344
2345#ifdef BSD4_1
2346#include <whoami.h>
2347#endif
2348
c0c86835 2349extern Lisp_Object Vsystem_name;
86a5659e 2350
f8a80313 2351#ifndef BSD4_1
f8a80313
RS		 2352#ifndef VMS
2353#ifdef HAVE_SOCKETS
2354#include <sys/socket.h>
2355#include <netdb.h>
2356#endif /* HAVE_SOCKETS */
2357#endif /* not VMS */
f8a80313
RS		 2358#endif /* not BSD4_1 */
2359
8581cd64
KH		 2360#ifdef TRY_AGAIN
2361#ifndef HAVE_H_ERRNO
2362extern int h_errno;
2363#endif
2364#endif /* TRY_AGAIN */
2365
c0c86835
KH		 2366void
2367init_system_name ()
86a5659e 2368{
86a5659e 2369#ifdef BSD4_1
c0c86835 2370 Vsystem_name = build_string (sysname);
67004ffb 2371#else
67004ffb 2372#ifdef VMS
c0c86835
KH		 2373 char *sp, *end;
2374 if ((sp = egetenv ("SYS$NODE")) == 0)
2375 Vsystem_name = build_string ("vax-vms");
2376 else if ((end = index (sp, ':')) == 0)
2377 Vsystem_name = build_string (sp);
2378 else
2379 Vsystem_name = make_string (sp, end - sp);
67004ffb 2380#else
210b2b4f 2381#ifndef HAVE_GETHOSTNAME
c0c86835
KH		 2382 struct utsname uts;
2383 uname (&uts);
2384 Vsystem_name = build_string (uts.nodename);
67004ffb 2385#else /* HAVE_GETHOSTNAME */
cc6e7269 2386 unsigned int hostname_size = 256;
c0c86835
KH		 2387 char *hostname = (char *) alloca (hostname_size);
2388
2389 /* Try to get the host name; if the buffer is too short, try
2390 again. Apparently, the only indication gethostname gives of
2391 whether the buffer was large enough is the presence or absence
2392 of a '\0' in the string. Eech. */
2393 for (;;)
2394 {
2395 gethostname (hostname, hostname_size - 1);
2396 hostname[hostname_size - 1] = '\0';
2397
2398 /* Was the buffer large enough for the '\0'? */
2399 if (strlen (hostname) < hostname_size - 1)
2400 break;
2401
2402 hostname_size <<= 1;
2403 hostname = (char *) alloca (hostname_size);
2404 }
67004ffb 2405#ifdef HAVE_SOCKETS
c0c86835
KH		 2406 /* Turn the hostname into the official, fully-qualified hostname.
2407 Don't do this if we're going to dump; this can confuse system
2408 libraries on some machines and make the dumped emacs core dump. */
67004ffb 2409#ifndef CANNOT_DUMP
c0c86835 2410 if (initialized)
67004ffb 2411#endif /* not CANNOT_DUMP */
960d894c
KH		 2412 if (! index (hostname, '.'))
2413 {
2414 struct hostent *hp;
2415 int count;
2416 for (count = 0;; count++)
2417 {
e24f1d55 2418#ifdef TRY_AGAIN
960d894c 2419 h_errno = 0;
e24f1d55 2420#endif
960d894c 2421 hp = gethostbyname (hostname);
efa04277 2422#ifdef TRY_AGAIN
960d894c
KH		 2423 if (! (hp == 0 && h_errno == TRY_AGAIN))
2424#endif
2425 break;
2426 if (count >= 5)
2427 break;
2428 Fsleep_for (make_number (1), Qnil);
2429 }
2430 if (hp)
2431 {
2432 char *fqdn = (char *) hp->h_name;
7c15926f 2433#if 0
960d894c 2434 char *p;
7c15926f 2435#endif
960d894c
KH		 2436
2437 if (!index (fqdn, '.'))
2438 {
2439 /* We still don't have a fully qualified domain name.
2440 Try to find one in the list of alternate names */
2441 char **alias = hp->h_aliases;
2442 while (*alias && !index (*alias, '.'))
2443 alias++;
2444 if (*alias)
2445 fqdn = *alias;
2446 }
2447 hostname = fqdn;
ab1649fe 2448#if 0
960d894c
KH		 2449 /* Convert the host name to lower case. */
2450 /* Using ctype.h here would introduce a possible locale
2451 dependence that is probably wrong for hostnames. */
2452 p = hostname;
2453 while (*p)
2454 {
2455 if (*p >= 'A' && *p <= 'Z')
2456 *p += 'a' - 'A';
2457 p++;
2458 }
2459#endif
2460 }
2461 }
67004ffb 2462#endif /* HAVE_SOCKETS */
6250a9db
KH		 2463 /* We used to try using getdomainname here,
2464 but NIIBE Yutaka <gniibe@etl.go.jp> says that
0b93aa53
RS		 2465 getdomainname gets the NIS/YP domain which often is not the same
2466 as in Internet domain name. */
6250a9db
KH		 2467#if 0 /* Turned off because sysinfo is not really likely to return the
2468 correct Internet domain. */
0b93aa53 2469#if (HAVE_SYSINFO && defined (SI_SRPC_DOMAIN))
b05af5d3
PE		 2470 if (! index (hostname, '.'))
2471 {
2472 /* The hostname is not fully qualified. Append the domain name. */
2473
2474 int hostlen = strlen (hostname);
2475 int domain_size = 256;
2476
2477 for (;;)
2478 {
825e7e55
RS		 2479 char *domain = (char *) alloca (domain_size + 1);
2480 char *fqdn = (char *) alloca (hostlen + 1 + domain_size + 1);
b05af5d3
PE		 2481 int sys_domain_size = sysinfo (SI_SRPC_DOMAIN, domain, domain_size);
2482 if (sys_domain_size <= 0)
2483 break;
2484 if (domain_size < sys_domain_size)
2485 {
2486 domain_size = sys_domain_size;
2487 continue;
2488 }
b05af5d3 2489 strcpy (fqdn, hostname);
825e7e55
RS		 2490 if (domain[0] == '.')
2491 strcpy (fqdn + hostlen, domain);
9b80a5aa 2492 else if (domain[0] != 0)
825e7e55
RS		 2493 {
2494 fqdn[hostlen] = '.';
2495 strcpy (fqdn + hostlen + 1, domain);
2496 }
b05af5d3
PE		 2497 hostname = fqdn;
2498 break;
2499 }
2500 }
0b93aa53 2501#endif /* HAVE_SYSINFO && defined (SI_SRPC_DOMAIN) */
6250a9db 2502#endif /* 0 */
c0c86835 2503 Vsystem_name = build_string (hostname);
67004ffb 2504#endif /* HAVE_GETHOSTNAME */
210b2b4f 2505#endif /* VMS */
67004ffb 2506#endif /* BSD4_1 */
c0c86835
KH		 2507 {
2508 unsigned char *p;
d5db4077 2509 for (p = SDATA (Vsystem_name); *p; p++)
c0c86835
KH		 2510 if (*p == ' ' || *p == '\t')
2511 *p = '-';
2512 }
67004ffb 2513}
86a5659e 2514\f
7964ba9e 2515#ifndef MSDOS
86a5659e 2516#ifndef VMS
86d1f23a 2517#if !defined (HAVE_SELECT) || defined (BROKEN_SELECT_NON_X)
86a5659e 2518
86d1f23a
KH		 2519#include "sysselect.h"
2520#undef select
2521
2522#if defined (HAVE_X_WINDOWS) && !defined (HAVE_SELECT)
86a5659e
JB		 2523/* Cause explanatory error message at compile time,
2524 since the select emulation is not good enough for X. */
2525int *x = &x_windows_lose_if_no_select_system_call;
2526#endif
2527
2528/* Emulate as much as select as is possible under 4.1 and needed by Gnu Emacs
2529 * Only checks read descriptors.
2530 */
2531/* How long to wait between checking fds in select */
2532#define SELECT_PAUSE 1
2533int select_alarmed;
2534
2535/* For longjmp'ing back to read_input_waiting. */
2536
2537jmp_buf read_alarm_throw;
2538
2539/* Nonzero if the alarm signal should throw back to read_input_waiting.
2540 The read_socket_hook function sets this to 1 while it is waiting. */
2541
2542int read_alarm_should_throw;
2543
2544SIGTYPE
2545select_alarm ()
2546{
2547 select_alarmed = 1;
2548#ifdef BSD4_1
2549 sigrelse (SIGALRM);
2550#else /* not BSD4_1 */
2551 signal (SIGALRM, SIG_IGN);
2552#endif /* not BSD4_1 */
333f1b6f 2553 SIGNAL_THREAD_CHECK (SIGALRM);
86a5659e
JB		 2554 if (read_alarm_should_throw)
2555 longjmp (read_alarm_throw, 1);
2556}
2557
fe03522b 2558#ifndef WINDOWSNT
86a5659e
JB		 2559/* Only rfds are checked. */
2560int
86d1f23a 2561sys_select (nfds, rfds, wfds, efds, timeout)
86a5659e 2562 int nfds;
86d1f23a
KH		 2563 SELECT_TYPE *rfds, *wfds, *efds;
2564 EMACS_TIME *timeout;
86a5659e 2565{
ffdcc91d 2566 int ravail = 0;
86d1f23a
KH		 2567 SELECT_TYPE orfds;
2568 int timeoutval;
2569 int *local_timeout;
86a5659e
JB		 2570 extern int proc_buffered_char[];
2571#ifndef subprocesses
2572 int process_tick = 0, update_tick = 0;
2573#else
2574 extern int process_tick, update_tick;
2575#endif
86a5659e
JB		 2576 unsigned char buf;
2577
86d1f23a
KH		 2578#if defined (HAVE_SELECT) && defined (HAVE_X_WINDOWS)
2579 /* If we're using X, then the native select will work; we only need the
2580 emulation for non-X usage. */
2581 if (!NILP (Vwindow_system))
2582 return select (nfds, rfds, wfds, efds, timeout);
2583#endif
2584 timeoutval = timeout ? EMACS_SECS (*timeout) : 100000;
2585 local_timeout = &timeoutval;
2586 FD_ZERO (&orfds);
86a5659e
JB		 2587 if (rfds)
2588 {
2589 orfds = *rfds;
86d1f23a 2590 FD_ZERO (rfds);
86a5659e
JB		 2591 }
2592 if (wfds)
86d1f23a 2593 FD_ZERO (wfds);
86a5659e 2594 if (efds)
86d1f23a 2595 FD_ZERO (efds);
86a5659e
JB		 2596
2597 /* If we are looking only for the terminal, with no timeout,
2598 just read it and wait -- that's more efficient. */
86d1f23a
KH		 2599 if (*local_timeout == 100000 && process_tick == update_tick
2600 && FD_ISSET (0, &orfds))
86a5659e 2601 {
86d1f23a
KH		 2602 int fd;
2603 for (fd = 1; fd < nfds; ++fd)
2604 if (FD_ISSET (fd, &orfds))
2605 goto hardway;
86a5659e
JB		 2606 if (! detect_input_pending ())
2607 read_input_waiting ();
86d1f23a 2608 FD_SET (0, rfds);
86a5659e
JB		 2609 return 1;
2610 }
2611
86d1f23a 2612 hardway:
86a5659e
JB		 2613 /* Once a second, till the timer expires, check all the flagged read
2614 * descriptors to see if any input is available. If there is some then
2615 * set the corresponding bit in the return copy of rfds.
177c0ea7 2616 */
86a5659e
JB		 2617 while (1)
2618 {
86d1f23a 2619 register int to_check, fd;
86a5659e
JB		 2620
2621 if (rfds)
2622 {
86d1f23a 2623 for (to_check = nfds, fd = 0; --to_check >= 0; fd++)
86a5659e 2624 {
86d1f23a 2625 if (FD_ISSET (fd, &orfds))
86a5659e
JB		 2626 {
2627 int avail = 0, status = 0;
2628
86d1f23a 2629 if (fd == 0)
86a5659e
JB		 2630 avail = detect_input_pending (); /* Special keyboard handler */
2631 else
2632 {
2633#ifdef FIONREAD
2634 status = ioctl (fd, FIONREAD, &avail);
2635#else /* no FIONREAD */
2636 /* Hoping it will return -1 if nothing available
2637 or 0 if all 0 chars requested are read. */
2638 if (proc_buffered_char[fd] >= 0)
2639 avail = 1;
2640 else
2641 {
2642 avail = read (fd, &buf, 1);
2643 if (avail > 0)
2644 proc_buffered_char[fd] = buf;
2645 }
2646#endif /* no FIONREAD */
2647 }
2648 if (status >= 0 && avail > 0)
2649 {
86d1f23a 2650 FD_SET (fd, rfds);
86a5659e
JB		 2651 ravail++;
2652 }
2653 }
2654 }
2655 }
2656 if (*local_timeout == 0 || ravail != 0 || process_tick != update_tick)
2657 break;
ffdcc91d
GM		 2658
2659 turn_on_atimers (0);
2660 signal (SIGALRM, select_alarm);
86a5659e
JB		 2661 select_alarmed = 0;
2662 alarm (SELECT_PAUSE);
177c0ea7 2663
86a5659e
JB		 2664 /* Wait for a SIGALRM (or maybe a SIGTINT) */
2665 while (select_alarmed == 0 && *local_timeout != 0
2666 && process_tick == update_tick)
2667 {
2668 /* If we are interested in terminal input,
2669 wait by reading the terminal.
2670 That makes instant wakeup for terminal input at least. */
86d1f23a 2671 if (FD_ISSET (0, &orfds))
86a5659e
JB		 2672 {
2673 read_input_waiting ();
2674 if (detect_input_pending ())
2675 select_alarmed = 1;
2676 }
2677 else
2678 pause ();
2679 }
2680 (*local_timeout) -= SELECT_PAUSE;
177c0ea7 2681
ffdcc91d
GM		 2682 /* Reset the old alarm if there was one. */
2683 turn_on_atimers (1);
177c0ea7 2684
86a5659e
JB		 2685 if (*local_timeout == 0) /* Stop on timer being cleared */
2686 break;
2687 }
2688 return ravail;
2689}
fe03522b 2690#endif /* not WINDOWSNT */
86a5659e
JB		 2691
2692/* Read keyboard input into the standard buffer,
2693 waiting for at least one character. */
2694
dfcf069d 2695void
86a5659e
JB		 2696read_input_waiting ()
2697{
34567704
JB		 2698 int nread, i;
2699 extern int quit_char;
86a5659e
JB		 2700
2701 if (read_socket_hook)
2702 {
9f893fc6
KS		 2703 struct input_event hold_quit;
2704
2705 EVENT_INIT (hold_quit);
2706 hold_quit.kind = NO_EVENT;
2707
86a5659e
JB		 2708 read_alarm_should_throw = 0;
2709 if (! setjmp (read_alarm_throw))
9f893fc6 2710 nread = (*read_socket_hook) (0, 1, &hold_quit);
86a5659e
JB		 2711 else
2712 nread = -1;
f4a7e5bd 2713
9f893fc6
KS		 2714 if (hold_quit.kind != NO_EVENT)
2715 kbd_buffer_store_event (&hold_quit);
86a5659e
JB		 2716 }
2717 else
86a5659e 2718 {
50acda85 2719 struct input_event e;
f4a7e5bd
RS		 2720 char buf[3];
2721 nread = read (fileno (stdin), buf, 1);
50acda85 2722 EVENT_INIT (e);
f4a7e5bd
RS		 2723
2724 /* Scan the chars for C-g and store them in kbd_buffer. */
e43bd4f5 2725 e.kind = ASCII_KEYSTROKE_EVENT;
2d064114 2726 e.frame_or_window = selected_frame;
f4a7e5bd
RS		 2727 e.modifiers = 0;
2728 for (i = 0; i < nread; i++)
a00d5589 2729 {
f4a7e5bd
RS		 2730 /* Convert chars > 0177 to meta events if desired.
2731 We do this under the same conditions that read_avail_input does. */
2732 if (read_socket_hook == 0)
2733 {
2734 /* If the user says she has a meta key, then believe her. */
2735 if (meta_key == 1 && (buf[i] & 0x80))
2736 e.modifiers = meta_modifier;
2737 if (meta_key != 2)
2738 buf[i] &= ~0x80;
2739 }
b95520f5 2740
c81d47b4 2741 XSETINT (e.code, buf[i]);
f4a7e5bd
RS		 2742 kbd_buffer_store_event (&e);
2743 /* Don't look at input that follows a C-g too closely.
2744 This reduces lossage due to autorepeat on C-g. */
2745 if (buf[i] == quit_char)
2746 break;
2747 }
86a5659e
JB		 2748 }
2749}
2750
2751#endif /* not HAVE_SELECT */
2752#endif /* not VMS */
7964ba9e 2753#endif /* not MSDOS */
86a5659e
JB		 2754\f
2755#ifdef BSD4_1
08633194 2756void
23dab951
RS		 2757init_sigio (fd)
2758 int fd;
86a5659e
JB		 2759{
2760 if (noninteractive)
2761 return;
2762 lmode = LINTRUP | lmode;
23dab951 2763 ioctl (fd, TIOCLSET, &lmode);
86a5659e
JB		 2764}
2765
dfcf069d 2766void
86a5659e
JB		 2767reset_sigio ()
2768{
2769 if (noninteractive)
2770 return;
2771 lmode = ~LINTRUP & lmode;
2772 ioctl (0, TIOCLSET, &lmode);
2773}
2774
08633194 2775void
86a5659e
JB		 2776request_sigio ()
2777{
2778 sigrelse (SIGTINT);
2779
2780 interrupts_deferred = 0;
2781}
2782
08633194 2783void
86a5659e
JB		 2784unrequest_sigio ()
2785{
2786 sighold (SIGTINT);
2787
2788 interrupts_deferred = 1;
2789}
2790
2791/* still inside #ifdef BSD4_1 */
2792#ifdef subprocesses
2793
2794int sigheld; /* Mask of held signals */
2795
dfcf069d 2796void
86a5659e
JB		 2797sigholdx (signum)
2798 int signum;
2799{
2800 sigheld |= sigbit (signum);
2801 sighold (signum);
2802}
2803
dfcf069d 2804void
86a5659e
JB		 2805sigisheld (signum)
2806 int signum;
2807{
2808 sigheld |= sigbit (signum);
2809}
2810
dfcf069d 2811void
86a5659e
JB		 2812sigunhold (signum)
2813 int signum;
2814{
2815 sigheld &= ~sigbit (signum);
2816 sigrelse (signum);
2817}
2818
dfcf069d 2819void
86a5659e
JB		 2820sigfree () /* Free all held signals */
2821{
2822 int i;
2823 for (i = 0; i < NSIG; i++)
2824 if (sigheld & sigbit (i))
2825 sigrelse (i);
2826 sigheld = 0;
2827}
2828
dfcf069d 2829int
86a5659e
JB		 2830sigbit (i)
2831{
2832 return 1 << (i - 1);
2833}
2834#endif /* subprocesses */
2835#endif /* BSD4_1 */
2836\f
2837/* POSIX signals support - DJB */
2838/* Anyone with POSIX signals should have ANSI C declarations */
2839
2840#ifdef POSIX_SIGNALS
2841
c639b0e3 2842sigset_t empty_mask, full_mask;
86a5659e 2843
86a5659e
JB		 2844signal_handler_t
2845sys_signal (int signal_number, signal_handler_t action)
2846{
c639b0e3 2847 struct sigaction new_action, old_action;
86a5659e 2848 sigemptyset (&new_action.sa_mask);
e5c99298 2849 new_action.sa_handler = action;
275464e7 2850#if defined (SA_RESTART) && ! defined (BROKEN_SA_RESTART) && !defined(SYNC_INPUT)
25ab68af 2851 /* Emacs mostly works better with restartable system services. If this
55fafcf0
RS		 2852 flag exists, we probably want to turn it on here.
2853 However, on some systems this resets the timeout of `select'
2854 which means that `select' never finishes if it keeps getting signals.
2855 BROKEN_SA_RESTART is defined on those systems. */
275464e7
SM		 2856 /* It's not clear why the comment above says "mostly works better". --Stef
2857 When SYNC_INPUT is set, we don't want SA_RESTART because we need to poll
2858 for pending input so we need long-running syscalls to be interrupted
2859 after a signal that sets the interrupt_input_pending flag. */
25ab68af
RS		 2860 new_action.sa_flags = SA_RESTART;
2861#else
4a785b6e 2862 new_action.sa_flags = 0;
25ab68af 2863#endif
d32b2f3c 2864 sigaction (signal_number, &new_action, &old_action);
e5c99298 2865 return (old_action.sa_handler);
86a5659e
JB		 2866}
2867
e065a56e
JB		 2868#ifndef __GNUC__
2869/* If we're compiling with GCC, we don't need this function, since it
2870 can be written as a macro. */
2871sigset_t
2872sys_sigmask (int sig)
2873{
2874 sigset_t mask;
2875 sigemptyset (&mask);
2876 sigaddset (&mask, sig);
2877 return mask;
2878}
2879#endif
2880
86a5659e
JB		 2881/* I'd like to have these guys return pointers to the mask storage in here,
2882 but there'd be trouble if the code was saving multiple masks. I'll be
2883 safe and pass the structure. It normally won't be more than 2 bytes
2884 anyhow. - DJB */
2885
2886sigset_t
2887sys_sigblock (sigset_t new_mask)
2888{
2889 sigset_t old_mask;
2890 sigprocmask (SIG_BLOCK, &new_mask, &old_mask);
2891 return (old_mask);
2892}
2893
2894sigset_t
2895sys_sigunblock (sigset_t new_mask)
2896{
2897 sigset_t old_mask;
2898 sigprocmask (SIG_UNBLOCK, &new_mask, &old_mask);
2899 return (old_mask);
2900}
2901
2902sigset_t
2903sys_sigsetmask (sigset_t new_mask)
2904{
2905 sigset_t old_mask;
2906 sigprocmask (SIG_SETMASK, &new_mask, &old_mask);
2907 return (old_mask);
2908}
2909
2910#endif /* POSIX_SIGNALS */
2911\f
b80263be 2912#if !defined HAVE_STRSIGNAL && !HAVE_DECL_SYS_SIGLIST
ca9c0567
PE		 2913static char *my_sys_siglist[NSIG];
2914# ifdef sys_siglist
2915# undef sys_siglist
2916# endif
2917# define sys_siglist my_sys_siglist
2918#endif
2919
2920void
2921init_signals ()
2922{
2923#ifdef POSIX_SIGNALS
2924 sigemptyset (&empty_mask);
2925 sigfillset (&full_mask);
2926#endif
2927
b80263be 2928#if !defined HAVE_STRSIGNAL && !HAVE_DECL_SYS_SIGLIST
ca9c0567
PE		 2929 if (! initialized)
2930 {
2931# ifdef SIGABRT
2932 sys_siglist[SIGABRT] = "Aborted";
2933# endif
2934# ifdef SIGAIO
2935 sys_siglist[SIGAIO] = "LAN I/O interrupt";
2936# endif
2937# ifdef SIGALRM
2938 sys_siglist[SIGALRM] = "Alarm clock";
2939# endif
2940# ifdef SIGBUS
2941 sys_siglist[SIGBUS] = "Bus error";
2942# endif
2943# ifdef SIGCLD
2944 sys_siglist[SIGCLD] = "Child status changed";
2945# endif
2946# ifdef SIGCHLD
2947 sys_siglist[SIGCHLD] = "Child status changed";
2948# endif
2949# ifdef SIGCONT
2950 sys_siglist[SIGCONT] = "Continued";
2951# endif
2952# ifdef SIGDANGER
2953 sys_siglist[SIGDANGER] = "Swap space dangerously low";
2954# endif
2955# ifdef SIGDGNOTIFY
2956 sys_siglist[SIGDGNOTIFY] = "Notification message in queue";
2957# endif
2958# ifdef SIGEMT
2959 sys_siglist[SIGEMT] = "Emulation trap";
2960# endif
2961# ifdef SIGFPE
2962 sys_siglist[SIGFPE] = "Arithmetic exception";
2963# endif
2964# ifdef SIGFREEZE
2965 sys_siglist[SIGFREEZE] = "SIGFREEZE";
2966# endif
2967# ifdef SIGGRANT
2968 sys_siglist[SIGGRANT] = "Monitor mode granted";
2969# endif
2970# ifdef SIGHUP
2971 sys_siglist[SIGHUP] = "Hangup";
2972# endif
2973# ifdef SIGILL
2974 sys_siglist[SIGILL] = "Illegal instruction";
2975# endif
2976# ifdef SIGINT
2977 sys_siglist[SIGINT] = "Interrupt";
2978# endif
2979# ifdef SIGIO
2980 sys_siglist[SIGIO] = "I/O possible";
2981# endif
2982# ifdef SIGIOINT
2983 sys_siglist[SIGIOINT] = "I/O intervention required";
2984# endif
2985# ifdef SIGIOT
2986 sys_siglist[SIGIOT] = "IOT trap";
2987# endif
2988# ifdef SIGKILL
2989 sys_siglist[SIGKILL] = "Killed";
2990# endif
2991# ifdef SIGLOST
2992 sys_siglist[SIGLOST] = "Resource lost";
2993# endif
2994# ifdef SIGLWP
2995 sys_siglist[SIGLWP] = "SIGLWP";
2996# endif
2997# ifdef SIGMSG
2998 sys_siglist[SIGMSG] = "Monitor mode data available";
2999# endif
3000# ifdef SIGPHONE
3001 sys_siglist[SIGWIND] = "SIGPHONE";
3002# endif
3003# ifdef SIGPIPE
3004 sys_siglist[SIGPIPE] = "Broken pipe";
3005# endif
3006# ifdef SIGPOLL
3007 sys_siglist[SIGPOLL] = "Pollable event occurred";
3008# endif
3009# ifdef SIGPROF
3010 sys_siglist[SIGPROF] = "Profiling timer expired";
3011# endif
3012# ifdef SIGPTY
3013 sys_siglist[SIGPTY] = "PTY I/O interrupt";
3014# endif
3015# ifdef SIGPWR
3016 sys_siglist[SIGPWR] = "Power-fail restart";
3017# endif
3018# ifdef SIGQUIT
3019 sys_siglist[SIGQUIT] = "Quit";
3020# endif
3021# ifdef SIGRETRACT
3022 sys_siglist[SIGRETRACT] = "Need to relinguish monitor mode";
3023# endif
3024# ifdef SIGSAK
3025 sys_siglist[SIGSAK] = "Secure attention";
3026# endif
3027# ifdef SIGSEGV
3028 sys_siglist[SIGSEGV] = "Segmentation violation";
3029# endif
3030# ifdef SIGSOUND
3031 sys_siglist[SIGSOUND] = "Sound completed";
3032# endif
3033# ifdef SIGSTOP
3034 sys_siglist[SIGSTOP] = "Stopped (signal)";
3035# endif
3036# ifdef SIGSTP
3037 sys_siglist[SIGSTP] = "Stopped (user)";
3038# endif
3039# ifdef SIGSYS
3040 sys_siglist[SIGSYS] = "Bad argument to system call";
3041# endif
3042# ifdef SIGTERM
3043 sys_siglist[SIGTERM] = "Terminated";
3044# endif
3045# ifdef SIGTHAW
3046 sys_siglist[SIGTHAW] = "SIGTHAW";
3047# endif
3048# ifdef SIGTRAP
3049 sys_siglist[SIGTRAP] = "Trace/breakpoint trap";
3050# endif
3051# ifdef SIGTSTP
3052 sys_siglist[SIGTSTP] = "Stopped (user)";
3053# endif
3054# ifdef SIGTTIN
3055 sys_siglist[SIGTTIN] = "Stopped (tty input)";
3056# endif
3057# ifdef SIGTTOU
3058 sys_siglist[SIGTTOU] = "Stopped (tty output)";
3059# endif
3060# ifdef SIGURG
3061 sys_siglist[SIGURG] = "Urgent I/O condition";
3062# endif
3063# ifdef SIGUSR1
3064 sys_siglist[SIGUSR1] = "User defined signal 1";
3065# endif
3066# ifdef SIGUSR2
3067 sys_siglist[SIGUSR2] = "User defined signal 2";
3068# endif
3069# ifdef SIGVTALRM
3070 sys_siglist[SIGVTALRM] = "Virtual timer expired";
3071# endif
3072# ifdef SIGWAITING
3073 sys_siglist[SIGWAITING] = "Process's LWPs are blocked";
3074# endif
3075# ifdef SIGWINCH
3076 sys_siglist[SIGWINCH] = "Window size changed";
3077# endif
3078# ifdef SIGWIND
3079 sys_siglist[SIGWIND] = "SIGWIND";
3080# endif
3081# ifdef SIGXCPU
3082 sys_siglist[SIGXCPU] = "CPU time limit exceeded";
3083# endif
3084# ifdef SIGXFSZ
3085 sys_siglist[SIGXFSZ] = "File size limit exceeded";
3086# endif
3087 }
b80263be 3088#endif /* !defined HAVE_STRSIGNAL && !defined HAVE_DECL_SYS_SIGLIST */
ca9c0567
PE		 3089}
3090\f
9927a7b1 3091#ifndef HAVE_RANDOM
4bb8c8b7
KH		 3092#ifdef random
3093#define HAVE_RANDOM
3094#endif
3095#endif
3096
3097/* Figure out how many bits the system's random number generator uses.
3098 `random' and `lrand48' are assumed to return 31 usable bits.
3099 BSD `rand' returns a 31 bit value but the low order bits are unusable;
3100 so we'll shift it and treat it like the 15-bit USG `rand'. */
3101
3102#ifndef RAND_BITS
3103# ifdef HAVE_RANDOM
3104# define RAND_BITS 31
3105# else /* !HAVE_RANDOM */
3106# ifdef HAVE_LRAND48
3107# define RAND_BITS 31
3108# define random lrand48
3109# else /* !HAVE_LRAND48 */
3110# define RAND_BITS 15
3111# if RAND_MAX == 32767
3112# define random rand
3113# else /* RAND_MAX != 32767 */
3114# if RAND_MAX == 2147483647
3115# define random() (rand () >> 16)
3116# else /* RAND_MAX != 2147483647 */
3117# ifdef USG
3118# define random rand
3119# else
3120# define random() (rand () >> 16)
2a633456 3121# endif /* !USG */
4bb8c8b7
KH		 3122# endif /* RAND_MAX != 2147483647 */
3123# endif /* RAND_MAX != 32767 */
3124# endif /* !HAVE_LRAND48 */
3125# endif /* !HAVE_RANDOM */
3126#endif /* !RAND_BITS */
2e46c7c6 3127
4bb8c8b7
KH		 3128void
3129seed_random (arg)
3130 long arg;
86a5659e 3131{
4bb8c8b7
KH		 3132#ifdef HAVE_RANDOM
3133 srandom ((unsigned int)arg);
f8b53a82 3134#else
4bb8c8b7 3135# ifdef HAVE_LRAND48
76425a49 3136 srand48 (arg);
4bb8c8b7
KH		 3137# else
3138 srand ((unsigned int)arg);
3139# endif
2e46c7c6 3140#endif
86a5659e
JB		 3141}
3142
4bb8c8b7
KH		 3143/*
3144 * Build a full Emacs-sized word out of whatever we've got.
3145 * This suffices even for a 64-bit architecture with a 15-bit rand.
3146 */
3147long
3148get_random ()
3149{
3150 long val = random ();
3151#if VALBITS > RAND_BITS
3152 val = (val << RAND_BITS) ^ random ();
3153#if VALBITS > 2*RAND_BITS
3154 val = (val << RAND_BITS) ^ random ();
3155#if VALBITS > 3*RAND_BITS
3156 val = (val << RAND_BITS) ^ random ();
3157#if VALBITS > 4*RAND_BITS
3158 val = (val << RAND_BITS) ^ random ();
3159#endif /* need at least 5 */
3160#endif /* need at least 4 */
3161#endif /* need at least 3 */
3162#endif /* need at least 2 */
3163 return val & ((1L << VALBITS) - 1);
3164}
86a5659e
JB		 3165\f
3166#ifdef WRONG_NAME_INSQUE
3167
3168insque (q,p)
3169 caddr_t q,p;
3170{
3171 _insque (q,p);
3172}
3173
3174#endif
3175\f
3176#ifdef VMS
3177
3178#ifdef getenv
3179/* If any place else asks for the TERM variable,
3180 allow it to be overridden with the EMACS_TERM variable
3181 before attempting to translate the logical name TERM. As a last
3182 resort, ask for VAX C's special idea of the TERM variable. */
3183#undef getenv
3184char *
3185sys_getenv (name)
3186 char *name;
3187{
3188 register char *val;
3189 static char buf[256];
3190 static struct dsc$descriptor_s equiv
3191 = {sizeof (buf), DSC$K_DTYPE_T, DSC$K_CLASS_S, buf};
3192 static struct dsc$descriptor_s d_name
3193 = {0, DSC$K_DTYPE_T, DSC$K_CLASS_S, 0};
3194 short eqlen;
3195
3196 if (!strcmp (name, "TERM"))
3197 {
3198 val = (char *) getenv ("EMACS_TERM");
3199 if (val)
3200 return val;
3201 }
3202
3203 d_name.dsc$w_length = strlen (name);
3204 d_name.dsc$a_pointer = name;
986ffb24 3205 if (LIB$SYS_TRNLOG (&d_name, &eqlen, &equiv) == 1)
86a5659e
JB		 3206 {
3207 char *str = (char *) xmalloc (eqlen + 1);
3208 bcopy (buf, str, eqlen);
3209 str[eqlen] = '\0';
3210 /* This is a storage leak, but a pain to fix. With luck,
3211 no one will ever notice. */
3212 return str;
3213 }
3214 return (char *) getenv (name);
3215}
3216#endif /* getenv */
3217
3218#ifdef abort
3219/* Since VMS doesn't believe in core dumps, the only way to debug this beast is
3220 to force a call on the debugger from within the image. */
3221#undef abort
3222sys_abort ()
3223{
3224 reset_sys_modes ();
3225 LIB$SIGNAL (SS$_DEBUG);
3226}
3227#endif /* abort */
3228#endif /* VMS */
3229\f
3230#ifdef VMS
3231#ifdef LINK_CRTL_SHARE
ea5a0917 3232#ifdef SHARABLE_LIB_BUG
eb8c3be9 3233/* Variables declared noshare and initialized in sharable libraries
86a5659e
JB		 3234 cannot be shared. The VMS linker incorrectly forces you to use a private
3235 version which is uninitialized... If not for this "feature", we
3236 could use the C library definition of sys_nerr and sys_errlist. */
3237int sys_nerr = 35;
3238char *sys_errlist[] =
3239 {
3240 "error 0",
3241 "not owner",
3242 "no such file or directory",
3243 "no such process",
3244 "interrupted system call",
3245 "i/o error",
3246 "no such device or address",
3247 "argument list too long",
3248 "exec format error",
3249 "bad file number",
3250 "no child process",
3251 "no more processes",
3252 "not enough memory",
3253 "permission denied",
3254 "bad address",
3255 "block device required",
3256 "mount devices busy",
3257 "file exists",
3258 "cross-device link",
3259 "no such device",
3260 "not a directory",
3261 "is a directory",
3262 "invalid argument",
3263 "file table overflow",
3264 "too many open files",
3265 "not a typewriter",
3266 "text file busy",
3267 "file too big",
3268 "no space left on device",
3269 "illegal seek",
3270 "read-only file system",
3271 "too many links",
3272 "broken pipe",
3273 "math argument",
3274 "result too large",
3275 "I/O stream empty",
3276 "vax/vms specific error code nontranslatable error"
3277 };
ea5a0917 3278#endif /* SHARABLE_LIB_BUG */
86a5659e
JB		 3279#endif /* LINK_CRTL_SHARE */
3280#endif /* VMS */
7088d1ca
RM		 3281
3282#ifndef HAVE_STRERROR
fe03522b 3283#ifndef WINDOWSNT
7088d1ca
RM		 3284char *
3285strerror (errnum)
3286 int errnum;
3287{
3288 extern char *sys_errlist[];
3289 extern int sys_nerr;
3290
3291 if (errnum >= 0 && errnum < sys_nerr)
3292 return sys_errlist[errnum];
3293 return (char *) "Unknown error";
3294}
fe03522b 3295#endif /* not WINDOWSNT */
7088d1ca 3296#endif /* ! HAVE_STRERROR */
86a5659e 3297\f
86a5659e 3298int
68c45bf0 3299emacs_open (path, oflag, mode)
8c2ba7de 3300 const char *path;
86a5659e
JB		 3301 int oflag, mode;
3302{
3303 register int rtnval;
68c45bf0
PE		 3304
3305#ifdef BSD4_1
177c0ea7 3306 if (oflag & O_CREAT)
68c45bf0
PE		 3307 return creat (path, mode);
3308#endif
177c0ea7 3309
86a5659e 3310 while ((rtnval = open (path, oflag, mode)) == -1
275464e7
SM		 3311 && (errno == EINTR))
3312 QUIT;
86a5659e
JB		 3313 return (rtnval);
3314}
3315
dfcf069d 3316int
68c45bf0 3317emacs_close (fd)
86a5659e
JB		 3318 int fd;
3319{
fe111daf 3320 int did_retry = 0;
86a5659e
JB		 3321 register int rtnval;
3322
3323 while ((rtnval = close (fd)) == -1
fe111daf
KH		 3324 && (errno == EINTR))
3325 did_retry = 1;
3326
3327 /* If close is interrupted SunOS 4.1 may or may not have closed the
3328 file descriptor. If it did the second close will fail with
3329 errno = EBADF. That means we have succeeded. */
3330 if (rtnval == -1 && did_retry && errno == EBADF)
3331 return 0;
3332
86a5659e
JB		 3333 return rtnval;
3334}
3335
86a5659e 3336int
68c45bf0 3337emacs_read (fildes, buf, nbyte)
86a5659e
JB		 3338 int fildes;
3339 char *buf;
3340 unsigned int nbyte;
3341{
3342 register int rtnval;
177c0ea7 3343
86a5659e 3344 while ((rtnval = read (fildes, buf, nbyte)) == -1
275464e7
SM		 3345 && (errno == EINTR))
3346 QUIT;
86a5659e
JB		 3347 return (rtnval);
3348}
3349
3350int
68c45bf0 3351emacs_write (fildes, buf, nbyte)
86a5659e 3352 int fildes;
7b1cc119 3353 const char *buf;
86a5659e
JB		 3354 unsigned int nbyte;
3355{
b95520f5 3356 register int rtnval, bytes_written;
86a5659e 3357
b95520f5
BF		 3358 bytes_written = 0;
3359
3360 while (nbyte > 0)
3361 {
3362 rtnval = write (fildes, buf, nbyte);
3363
3364 if (rtnval == -1)
3365 {
3366 if (errno == EINTR)
77220eeb
SM		 3367 {
3368#ifdef SYNC_INPUT
3369 /* I originally used `QUIT' but that might causes files to
3370 be truncated if you hit C-g in the middle of it. --Stef */
3371 if (interrupt_input_pending)
3372 handle_async_input ();
3373#endif
3374 continue;
3375 }
b95520f5 3376 else
aa670904 3377 return (bytes_written ? bytes_written : -1);
b95520f5
BF		 3378 }
3379
3380 buf += rtnval;
3381 nbyte -= rtnval;
3382 bytes_written += rtnval;
3383 }
3384 return (bytes_written);
86a5659e 3385}
86a5659e
JB		 3386\f
3387#ifdef USG
3388/*
3389 * All of the following are for USG.
3390 *
3391 * On USG systems the system calls are INTERRUPTIBLE by signals
3392 * that the user program has elected to catch. Thus the system call
3393 * must be retried in these cases. To handle this without massive
3394 * changes in the source code, we remap the standard system call names
3395 * to names for our own functions in sysdep.c that do the system call
3396 * with retries. Actually, for portability reasons, it is good
3397 * programming practice, as this example shows, to limit all actual
eb8c3be9 3398 * system calls to a single occurrence in the source. Sure, this
86a5659e
JB		 3399 * adds an extra level of function call overhead but it is almost
3400 * always negligible. Fred Fish, Unisoft Systems Inc.
3401 */
3402
86a5659e
JB		 3403/*
3404 * Warning, this function may not duplicate 4.2 action properly
3405 * under error conditions.
3406 */
3407
3408#ifndef MAXPATHLEN
3409/* In 4.1, param.h fails to define this. */
3410#define MAXPATHLEN 1024
3411#endif
3412
3413#ifndef HAVE_GETWD
3414
3415char *
3416getwd (pathname)
3417 char *pathname;
3418{
3419 char *npath, *spath;
3420 extern char *getcwd ();
3421
9ac0d9e0 3422 BLOCK_INPUT; /* getcwd uses malloc */
86a5659e 3423 spath = npath = getcwd ((char *) 0, MAXPATHLEN);
f4a7e5bd 3424 if (spath == 0)
18b6bc73
GM		 3425 {
3426 UNBLOCK_INPUT;
3427 return spath;
3428 }
86a5659e
JB		 3429 /* On Altos 3068, getcwd can return @hostname/dir, so discard
3430 up to first slash. Should be harmless on other systems. */
3431 while (*npath && *npath != '/')
3432 npath++;
3433 strcpy (pathname, npath);
3434 free (spath); /* getcwd uses malloc */
9ac0d9e0 3435 UNBLOCK_INPUT;
86a5659e
JB		 3436 return pathname;
3437}
3438
3439#endif /* HAVE_GETWD */
3440
3441/*
3442 * Emulate rename using unlink/link. Note that this is
3443 * only partially correct. Also, doesn't enforce restriction
3444 * that files be of same type (regular->regular, dir->dir, etc).
3445 */
3446
4746118a
JB		 3447#ifndef HAVE_RENAME
3448
86a5659e 3449rename (from, to)
19c7afdf
JB		 3450 const char *from;
3451 const char *to;
86a5659e
JB		 3452{
3453 if (access (from, 0) == 0)
3454 {
3455 unlink (to);
3456 if (link (from, to) == 0)
3457 if (unlink (from) == 0)
3458 return (0);
3459 }
3460 return (-1);
3461}
3462
4746118a
JB		 3463#endif
3464
86a5659e
JB		 3465
3466#ifdef HPUX
3467#ifndef HAVE_PERROR
3468
3469/* HPUX curses library references perror, but as far as we know
3470 it won't be called. Anyway this definition will do for now. */
3471
3472perror ()
3473{
3474}
3475
3476#endif /* not HAVE_PERROR */
3477#endif /* HPUX */
3478
3479#ifndef HAVE_DUP2
3480
3481/*
3482 * Emulate BSD dup2. First close newd if it already exists.
3483 * Then, attempt to dup oldd. If not successful, call dup2 recursively
3484 * until we are, then close the unsuccessful ones.
3485 */
3486
3487dup2 (oldd, newd)
3488 int oldd;
3489 int newd;
3490{
3491 register int fd, ret;
177c0ea7 3492
68c45bf0 3493 emacs_close (newd);
86a5659e
JB		 3494
3495#ifdef F_DUPFD
68c45bf0 3496 return fcntl (oldd, F_DUPFD, newd);
86a5659e
JB		 3497#else
3498 fd = dup (old);
3499 if (fd == -1)
3500 return -1;
3501 if (fd == new)
3502 return new;
3503 ret = dup2 (old,new);
68c45bf0 3504 emacs_close (fd);
86a5659e
JB		 3505 return ret;
3506#endif
3507}
3508
3509#endif /* not HAVE_DUP2 */
3510
3511/*
3512 * Gettimeofday. Simulate as much as possible. Only accurate
3513 * to nearest second. Emacs doesn't use tzp so ignore it for now.
3514 * Only needed when subprocesses are defined.
3515 */
3516
3517#ifdef subprocesses
3518#ifndef VMS
3519#ifndef HAVE_GETTIMEOFDAY
3520#ifdef HAVE_TIMEVAL
177c0ea7 3521
86a5659e 3522/* ARGSUSED */
dfcf069d 3523int
86a5659e
JB		 3524gettimeofday (tp, tzp)
3525 struct timeval *tp;
3526 struct timezone *tzp;
3527{
3528 extern long time ();
3529
177c0ea7 3530 tp->tv_sec = time ((long *)0);
86a5659e 3531 tp->tv_usec = 0;
4ca7594f
RS		 3532 if (tzp != 0)
3533 tzp->tz_minuteswest = -1;
dfcf069d 3534 return 0;
86a5659e 3535}
177c0ea7 3536
86a5659e
JB		 3537#endif
3538#endif
3539#endif
3540#endif /* subprocess && !HAVE_GETTIMEOFDAY && HAVE_TIMEVAL && !VMS */
177c0ea7 3541
86a5659e
JB		 3542/*
3543 * This function will go away as soon as all the stubs fixed. (fnf)
3544 */
3545
dfcf069d 3546void
86a5659e
JB		 3547croak (badfunc)
3548 char *badfunc;
3549{
3550 printf ("%s not yet implemented\r\n", badfunc);
3551 reset_sys_modes ();
3552 exit (1);
3553}
3554
3555#endif /* USG */
3556\f
86a5659e
JB		 3557/* Directory routines for systems that don't have them. */
3558
3559#ifdef SYSV_SYSTEM_DIR
3560
3561#include <dirent.h>
3562
c4ea52a6 3563#if defined (BROKEN_CLOSEDIR) || !defined (HAVE_CLOSEDIR)
cfdc57af 3564
86a5659e
JB		 3565int
3566closedir (dirp)
3567 register DIR *dirp; /* stream from opendir */
3568{
cfdc57af
RS		 3569 int rtnval;
3570
68c45bf0 3571 rtnval = emacs_close (dirp->dd_fd);
1b929d25 3572
65aa44ac
JB		 3573 /* Some systems (like Solaris) allocate the buffer and the DIR all
3574 in one block. Why in the world are we freeing this ourselves
3575 anyway? */
3576#if ! (defined (sun) && defined (USG5_4))
3577 xfree ((char *) dirp->dd_buf); /* directory block defined in <dirent.h> */
3578#endif
9ac0d9e0 3579 xfree ((char *) dirp);
cfdc57af
RS		 3580
3581 return rtnval;
86a5659e 3582}
1db6401c 3583#endif /* BROKEN_CLOSEDIR or not HAVE_CLOSEDIR */
86a5659e
JB		 3584#endif /* SYSV_SYSTEM_DIR */
3585
3586#ifdef NONSYSTEM_DIR_LIBRARY
3587
3588DIR *
3589opendir (filename)
3590 char *filename; /* name of directory */
3591{
3592 register DIR *dirp; /* -> malloc'ed storage */
3593 register int fd; /* file descriptor for read */
3594 struct stat sbuf; /* result of fstat */
3595
68c45bf0 3596 fd = emacs_open (filename, O_RDONLY, 0);
86a5659e
JB		 3597 if (fd < 0)
3598 return 0;
3599
9ac0d9e0 3600 BLOCK_INPUT;
86a5659e
JB		 3601 if (fstat (fd, &sbuf) < 0
3602 || (sbuf.st_mode & S_IFMT) != S_IFDIR
7f77dbe3 3603 || (dirp = (DIR *) xmalloc (sizeof (DIR))) == 0)
86a5659e 3604 {
68c45bf0 3605 emacs_close (fd);
9ac0d9e0 3606 UNBLOCK_INPUT;
86a5659e
JB		 3607 return 0; /* bad luck today */
3608 }
9ac0d9e0 3609 UNBLOCK_INPUT;
86a5659e
JB		 3610
3611 dirp->dd_fd = fd;
3612 dirp->dd_loc = dirp->dd_size = 0; /* refill needed */
3613
3614 return dirp;
3615}
3616
3617void
3618closedir (dirp)
3619 register DIR *dirp; /* stream from opendir */
3620{
68c45bf0 3621 emacs_close (dirp->dd_fd);
9ac0d9e0 3622 xfree ((char *) dirp);
86a5659e
JB		 3623}
3624
3625
3626#ifndef VMS
3627#define DIRSIZ 14
3628struct olddir
3629 {
3630 ino_t od_ino; /* inode */
3631 char od_name[DIRSIZ]; /* filename */
3632 };
3633#endif /* not VMS */
3634
3635struct direct dir_static; /* simulated directory contents */
3636
3637/* ARGUSED */
3638struct direct *
3639readdir (dirp)
3640 register DIR *dirp; /* stream from opendir */
3641{
3642#ifndef VMS
3643 register struct olddir *dp; /* -> directory data */
3644#else /* VMS */
3645 register struct dir$_name *dp; /* -> directory data */
3646 register struct dir$_version *dv; /* -> version data */
3647#endif /* VMS */
3648
3649 for (; ;)
3650 {
3651 if (dirp->dd_loc >= dirp->dd_size)
3652 dirp->dd_loc = dirp->dd_size = 0;
3653
3654 if (dirp->dd_size == 0 /* refill buffer */
68c45bf0 3655 && (dirp->dd_size = emacs_read (dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ)) <= 0)
86a5659e
JB		 3656 return 0;
3657
3658#ifndef VMS
3659 dp = (struct olddir *) &dirp->dd_buf[dirp->dd_loc];
3660 dirp->dd_loc += sizeof (struct olddir);
3661
3662 if (dp->od_ino != 0) /* not deleted entry */
3663 {
3664 dir_static.d_ino = dp->od_ino;
3665 strncpy (dir_static.d_name, dp->od_name, DIRSIZ);
3666 dir_static.d_name[DIRSIZ] = '\0';
3667 dir_static.d_namlen = strlen (dir_static.d_name);
3668 dir_static.d_reclen = sizeof (struct direct)
3669 - MAXNAMLEN + 3
3670 + dir_static.d_namlen - dir_static.d_namlen % 4;
3671 return &dir_static; /* -> simulated structure */
3672 }
3673#else /* VMS */
3674 dp = (struct dir$_name *) dirp->dd_buf;
3675 if (dirp->dd_loc == 0)
3676 dirp->dd_loc = (dp->dir$b_namecount&1) ? dp->dir$b_namecount + 1
3677 : dp->dir$b_namecount;
3678 dv = (struct dir$_version *)&dp->dir$t_name[dirp->dd_loc];
3679 dir_static.d_ino = dv->dir$w_fid_num;
3680 dir_static.d_namlen = dp->dir$b_namecount;
3681 dir_static.d_reclen = sizeof (struct direct)
3682 - MAXNAMLEN + 3
3683 + dir_static.d_namlen - dir_static.d_namlen % 4;
3684 strncpy (dir_static.d_name, dp->dir$t_name, dp->dir$b_namecount);
3685 dir_static.d_name[dir_static.d_namlen] = '\0';
3686 dirp->dd_loc = dirp->dd_size; /* only one record at a time */
3687 return &dir_static;
3688#endif /* VMS */
3689 }
3690}
3691
3692#ifdef VMS
3693/* readdirver is just like readdir except it returns all versions of a file
3694 as separate entries. */
3695
3696/* ARGUSED */
3697struct direct *
3698readdirver (dirp)
3699 register DIR *dirp; /* stream from opendir */
3700{
3701 register struct dir$_name *dp; /* -> directory data */
3702 register struct dir$_version *dv; /* -> version data */
3703
3704 if (dirp->dd_loc >= dirp->dd_size - sizeof (struct dir$_name))
3705 dirp->dd_loc = dirp->dd_size = 0;
3706
3707 if (dirp->dd_size == 0 /* refill buffer */
3708 && (dirp->dd_size = sys_read (dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ)) <= 0)
3709 return 0;
3710
3711 dp = (struct dir$_name *) dirp->dd_buf;
3712 if (dirp->dd_loc == 0)
3713 dirp->dd_loc = (dp->dir$b_namecount & 1) ? dp->dir$b_namecount + 1
3714 : dp->dir$b_namecount;
3715 dv = (struct dir$_version *) &dp->dir$t_name[dirp->dd_loc];
3716 strncpy (dir_static.d_name, dp->dir$t_name, dp->dir$b_namecount);
3717 sprintf (&dir_static.d_name[dp->dir$b_namecount], ";%d", dv->dir$w_version);
3718 dir_static.d_namlen = strlen (dir_static.d_name);
3719 dir_static.d_ino = dv->dir$w_fid_num;
3720 dir_static.d_reclen = sizeof (struct direct) - MAXNAMLEN + 3
3721 + dir_static.d_namlen - dir_static.d_namlen % 4;
3722 dirp->dd_loc = ((char *) (++dv) - dp->dir$t_name);
3723 return &dir_static;
3724}
3725
3726#endif /* VMS */
3727
3728#endif /* NONSYSTEM_DIR_LIBRARY */
23524fb9
JB		 3729
3730\f
53ea491a 3731int
061ea326 3732set_file_times (filename, atime, mtime)
8c2ba7de 3733 const char *filename;
53ea491a
KH		 3734 EMACS_TIME atime, mtime;
3735{
3736#ifdef HAVE_UTIMES
3737 struct timeval tv[2];
3738 tv[0] = atime;
3739 tv[1] = mtime;
8334eb21
RS		 3740 return utimes (filename, tv);
3741#else /* not HAVE_UTIMES */
53ea491a
KH		 3742 struct utimbuf utb;
3743 utb.actime = EMACS_SECS (atime);
3744 utb.modtime = EMACS_SECS (mtime);
8334eb21
RS		 3745 return utime (filename, &utb);
3746#endif /* not HAVE_UTIMES */
53ea491a
KH		 3747}
3748\f
23524fb9
JB		 3749/* mkdir and rmdir functions, for systems which don't have them. */
3750
3751#ifndef HAVE_MKDIR
3752/*
3753 * Written by Robert Rother, Mariah Corporation, August 1985.
3754 *
3755 * If you want it, it's yours. All I ask in return is that if you
3756 * figure out how to do this in a Bourne Shell script you send me
3757 * a copy.
3758 * sdcsvax!rmr or rmr@uscd
3759 *
3760 * Severely hacked over by John Gilmore to make a 4.2BSD compatible
3761 * subroutine. 11Mar86; hoptoad!gnu
3762 *
3763 * Modified by rmtodd@uokmax 6-28-87 -- when making an already existing dir,
3764 * subroutine didn't return EEXIST. It does now.
3765 */
3766
3767/*
3768 * Make a directory.
3769 */
f3892946
RS		 3770#ifdef MKDIR_PROTOTYPE
3771MKDIR_PROTOTYPE
3772#else
23524fb9
JB		 3773int
3774mkdir (dpath, dmode)
3775 char *dpath;
3776 int dmode;
f3892946 3777#endif
23524fb9 3778{
039f26a4 3779 int cpid, status, fd;
23524fb9
JB		 3780 struct stat statbuf;
3781
3782 if (stat (dpath, &statbuf) == 0)
3783 {
3784 errno = EEXIST; /* Stat worked, so it already exists */
3785 return -1;
3786 }
3787
3788 /* If stat fails for a reason other than non-existence, return error */
3789 if (errno != ENOENT)
3790 return -1;
3791
039f26a4 3792 synch_process_alive = 1;
23524fb9
JB		 3793 switch (cpid = fork ())
3794 {
3795
039f26a4 3796 case -1: /* Error in fork */
23524fb9
JB		 3797 return (-1); /* Errno is set already */
3798
3799 case 0: /* Child process */
3800 /*
3801 * Cheap hack to set mode of new directory. Since this
3802 * child process is going away anyway, we zap its umask.
3803 * FIXME, this won't suffice to set SUID, SGID, etc. on this
3804 * directory. Does anybody care?
3805 */
3806 status = umask (0); /* Get current umask */
3807 status = umask (status | (0777 & ~dmode)); /* Set for mkdir */
68c45bf0 3808 fd = emacs_open ("/dev/null", O_RDWR, 0);
039f26a4
RS		 3809 if (fd >= 0)
3810 {
3811 dup2 (fd, 0);
3812 dup2 (fd, 1);
3813 dup2 (fd, 2);
3814 }
23524fb9
JB		 3815 execl ("/bin/mkdir", "mkdir", dpath, (char *) 0);
3816 _exit (-1); /* Can't exec /bin/mkdir */
3817
3818 default: /* Parent process */
039f26a4 3819 wait_for_termination (cpid);
23524fb9
JB		 3820 }
3821
6b0824c9
JD		 3822 if (synch_process_death != 0 || synch_process_retcode != 0
3823 || synch_process_termsig != 0)
23524fb9
JB		 3824 {
3825 errno = EIO; /* We don't know why, but */
3826 return -1; /* /bin/mkdir failed */
3827 }
3828
3829 return 0;
3830}
3831#endif /* not HAVE_MKDIR */
3832
3833#ifndef HAVE_RMDIR
3834int
3835rmdir (dpath)
3836 char *dpath;
3837{
039f26a4 3838 int cpid, status, fd;
23524fb9
JB		 3839 struct stat statbuf;
3840
3841 if (stat (dpath, &statbuf) != 0)
3842 {
3843 /* Stat just set errno. We don't have to */
3844 return -1;
3845 }
3846
039f26a4 3847 synch_process_alive = 1;
23524fb9
JB		 3848 switch (cpid = fork ())
3849 {
3850
039f26a4 3851 case -1: /* Error in fork */
23524fb9
JB		 3852 return (-1); /* Errno is set already */
3853
3854 case 0: /* Child process */
68c45bf0 3855 fd = emacs_open ("/dev/null", O_RDWR, 0);
039f26a4
RS		 3856 if (fd >= 0)
3857 {
3858 dup2 (fd, 0);
3859 dup2 (fd, 1);
3860 dup2 (fd, 2);
3861 }
f560db78
RS		 3862 execl ("/bin/rmdir", "rmdir", dpath, (char *) 0);
3863 _exit (-1); /* Can't exec /bin/rmdir */
3864
207bdbdb 3865 default: /* Parent process */
f560db78 3866 wait_for_termination (cpid);
23524fb9
JB		 3867 }
3868
6b0824c9
JD		 3869 if (synch_process_death != 0 || synch_process_retcode != 0
3870 || synch_process_termsig != 0)
23524fb9
JB		 3871 {
3872 errno = EIO; /* We don't know why, but */
f560db78 3873 return -1; /* /bin/rmdir failed */
23524fb9
JB		 3874 }
3875
3876 return 0;
3877}
3878#endif /* !HAVE_RMDIR */
3879
3880
86a5659e
JB		 3881\f
3882/* Functions for VMS */
3883#ifdef VMS
86a5659e
JB		 3884#include <acldef.h>
3885#include <chpdef.h>
3886#include <jpidef.h>
3887
3888/* Return as a string the VMS error string pertaining to STATUS.
3889 Reuses the same static buffer each time it is called. */
3890
3891char *
3892vmserrstr (status)
3893 int status; /* VMS status code */
3894{
3895 int bufadr[2];
3896 short len;
3897 static char buf[257];
3898
3899 bufadr[0] = sizeof buf - 1;
3900 bufadr[1] = (int) buf;
3901 if (! (SYS$GETMSG (status, &len, bufadr, 0x1, 0) & 1))
3902 return "untranslatable VMS error status";
3903 buf[len] = '\0';
3904 return buf;
3905}
3906
3907#ifdef access
3908#undef access
177c0ea7 3909
86a5659e
JB		 3910/* The following is necessary because 'access' emulation by VMS C (2.0) does
3911 * not work correctly. (It also doesn't work well in version 2.3.)
3912 */
3913
3914#ifdef VMS4_4
3915
3916#define DESCRIPTOR(name,string) struct dsc$descriptor_s name = \
3917 { strlen (string), DSC$K_DTYPE_T, DSC$K_CLASS_S, string }
3918
3919typedef union {
3920 struct {
3921 unsigned short s_buflen;
3922 unsigned short s_code;
3923 char *s_bufadr;
3924 unsigned short *s_retlenadr;
3925 } s;
3926 int end;
3927} item;
3928#define buflen s.s_buflen
3929#define code s.s_code
3930#define bufadr s.s_bufadr
3931#define retlenadr s.s_retlenadr
3932
3933#define R_OK 4 /* test for read permission */
3934#define W_OK 2 /* test for write permission */
3935#define X_OK 1 /* test for execute (search) permission */
3936#define F_OK 0 /* test for presence of file */
3937
3938int
3939sys_access (path, mode)
3940 char *path;
3941 int mode;
3942{
3943 static char *user = NULL;
3944 char dir_fn[512];
3945
3946 /* translate possible directory spec into .DIR file name, so brain-dead
3947 * access can treat the directory like a file. */
3948 if (directory_file_name (path, dir_fn))
3949 path = dir_fn;
177c0ea7 3950
86a5659e
JB		 3951 if (mode == F_OK)
3952 return access (path, mode);
3953 if (user == NULL && (user = (char *) getenv ("USER")) == NULL)
3954 return -1;
3955 {
3956 int stat;
3957 int flags;
3958 int acces;
3959 unsigned short int dummy;
3960 item itemlst[3];
3961 static int constant = ACL$C_FILE;
3962 DESCRIPTOR (path_desc, path);
3963 DESCRIPTOR (user_desc, user);
177c0ea7 3964
86a5659e
JB		 3965 flags = 0;
3966 acces = 0;
3967 if ((mode & X_OK) && ((stat = access (path, mode)) < 0 || mode == X_OK))
3968 return stat;
3969 if (mode & R_OK)
3970 acces |= CHP$M_READ;
3971 if (mode & W_OK)
3972 acces |= CHP$M_WRITE;
3973 itemlst[0].buflen = sizeof (int);
3974 itemlst[0].code = CHP$_FLAGS;
3975 itemlst[0].bufadr = (char *) &flags;
3976 itemlst[0].retlenadr = &dummy;
3977 itemlst[1].buflen = sizeof (int);
3978 itemlst[1].code = CHP$_ACCESS;
3979 itemlst[1].bufadr = (char *) &acces;
3980 itemlst[1].retlenadr = &dummy;
3981 itemlst[2].end = CHP$_END;
3982 stat = SYS$CHECK_ACCESS (&constant, &path_desc, &user_desc, itemlst);
3983 return stat == SS$_NORMAL ? 0 : -1;
3984 }
3985}
3986
3987#else /* not VMS4_4 */
3988
3989#include <prvdef.h>
fe03522b
RS		 3990#define ACE$M_WRITE 2
3991#define ACE$C_KEYID 1
86a5659e
JB		 3992
3993static unsigned short memid, grpid;
3994static unsigned int uic;
3995
3996/* Called from init_sys_modes, so it happens not very often
3997 but at least each time Emacs is loaded. */
dfcf069d 3998void
86a5659e
JB		 3999sys_access_reinit ()
4000{
4001 uic = 0;
4002}
4003
4004int
4005sys_access (filename, type)
4006 char * filename;
4007 int type;
4008{
4009 struct FAB fab;
4010 struct XABPRO xab;
4011 int status, size, i, typecode, acl_controlled;
4012 unsigned int *aclptr, *aclend, aclbuf[60];
4013 union prvdef prvmask;
4014
4015 /* Get UIC and GRP values for protection checking. */
4016 if (uic == 0)
4017 {
4018 status = LIB$GETJPI (&JPI$_UIC, 0, 0, &uic, 0, 0);
4019 if (! (status & 1))
4020 return -1;
4021 memid = uic & 0xFFFF;
4022 grpid = uic >> 16;
4023 }
4024
fe03522b 4025 if (type != 2) /* not checking write access */
86a5659e
JB		 4026 return access (filename, type);
4027
4028 /* Check write protection. */
177c0ea7 4029
fe03522b 4030#define CHECKPRIV(bit) (prvmask.bit)
ea5a0917 4031#define WRITABLE(field) (! ((xab.xab$w_pro >> field) & XAB$M_NOWRITE))
86a5659e
JB		 4032
4033 /* Find privilege bits */
986ffb24 4034 status = SYS$SETPRV (0, 0, 0, prvmask);
86a5659e
JB		 4035 if (! (status & 1))
4036 error ("Unable to find privileges: %s", vmserrstr (status));
4037 if (CHECKPRIV (PRV$V_BYPASS))
4038 return 0; /* BYPASS enabled */
4039 fab = cc$rms_fab;
4040 fab.fab$b_fac = FAB$M_GET;
4041 fab.fab$l_fna = filename;
4042 fab.fab$b_fns = strlen (filename);
4043 fab.fab$l_xab = &xab;
4044 xab = cc$rms_xabpro;
4045 xab.xab$l_aclbuf = aclbuf;
4046 xab.xab$w_aclsiz = sizeof (aclbuf);
986ffb24 4047 status = SYS$OPEN (&fab, 0, 0);
86a5659e
JB		 4048 if (! (status & 1))
4049 return -1;
986ffb24 4050 SYS$CLOSE (&fab, 0, 0);
86a5659e 4051 /* Check system access */
ea5a0917 4052 if (CHECKPRIV (PRV$V_SYSPRV) && WRITABLE (XAB$V_SYS))
86a5659e
JB		 4053 return 0;
4054 /* Check ACL entries, if any */
4055 acl_controlled = 0;
4056 if (xab.xab$w_acllen > 0)
4057 {
4058 aclptr = aclbuf;
4059 aclend = &aclbuf[xab.xab$w_acllen / 4];
4060 while (*aclptr && aclptr < aclend)
4061 {
4062 size = (*aclptr & 0xff) / 4;
4063 typecode = (*aclptr >> 8) & 0xff;
4064 if (typecode == ACE$C_KEYID)
4065 for (i = size - 1; i > 1; i--)
4066 if (aclptr[i] == uic)
4067 {
4068 acl_controlled = 1;
4069 if (aclptr[1] & ACE$M_WRITE)
4070 return 0; /* Write access through ACL */
4071 }
4072 aclptr = &aclptr[size];
4073 }
4074 if (acl_controlled) /* ACL specified, prohibits write access */
4075 return -1;
4076 }
4077 /* No ACL entries specified, check normal protection */
ea5a0917 4078 if (WRITABLE (XAB$V_WLD)) /* World writable */
86a5659e 4079 return 0;
ea5a0917 4080 if (WRITABLE (XAB$V_GRP) &&
86a5659e 4081 (unsigned short) (xab.xab$l_uic >> 16) == grpid)
ea5a0917
KH		 4082 return 0; /* Group writable */
4083 if (WRITABLE (XAB$V_OWN) &&
86a5659e 4084 (xab.xab$l_uic & 0xFFFF) == memid)
ea5a0917 4085 return 0; /* Owner writable */
86a5659e 4086
ea5a0917 4087 return -1; /* Not writable */
86a5659e
JB		 4088}
4089#endif /* not VMS4_4 */
4090#endif /* access */
177c0ea7 4091
86a5659e
JB		 4092static char vtbuf[NAM$C_MAXRSS+1];
4093
4094/* translate a vms file spec to a unix path */
4095char *
4096sys_translate_vms (vfile)
4097 char * vfile;
4098{
4099 char * p;
4100 char * targ;
4101
4102 if (!vfile)
4103 return 0;
4104
4105 targ = vtbuf;
4106
4107 /* leading device or logical name is a root directory */
4108 if (p = strchr (vfile, ':'))
4109 {
4110 *targ++ = '/';
4111 while (vfile < p)
4112 *targ++ = *vfile++;
4113 vfile++;
4114 *targ++ = '/';
4115 }
4116 p = vfile;
4117 if (*p == '[' || *p == '<')
4118 {
4119 while (*++vfile != *p + 2)
4120 switch (*vfile)
4121 {
4122 case '.':
4123 if (vfile[-1] == *p)
4124 *targ++ = '.';
4125 *targ++ = '/';
4126 break;
4127
4128 case '-':
4129 *targ++ = '.';
4130 *targ++ = '.';
4131 break;
177c0ea7 4132
86a5659e
JB		 4133 default:
4134 *targ++ = *vfile;
4135 break;
4136 }
4137 vfile++;
4138 *targ++ = '/';
4139 }
4140 while (*vfile)
4141 *targ++ = *vfile++;
4142
4143 return vtbuf;
4144}
4145
4146static char utbuf[NAM$C_MAXRSS+1];
4147
4148/* translate a unix path to a VMS file spec */
4149char *
4150sys_translate_unix (ufile)
4151 char * ufile;
4152{
4153 int slash_seen = 0;
4154 char *p;
4155 char * targ;
4156
4157 if (!ufile)
4158 return 0;
4159
4160 targ = utbuf;
4161
4162 if (*ufile == '/')
4163 {
4164 ufile++;
4165 }
4166
4167 while (*ufile)
4168 {
4169 switch (*ufile)
4170 {
4171 case '/':
4172 if (slash_seen)
4173 if (index (&ufile[1], '/'))
4174 *targ++ = '.';
4175 else
4176 *targ++ = ']';
4177 else
4178 {
4179 *targ++ = ':';
4180 if (index (&ufile[1], '/'))
4181 *targ++ = '[';
4182 slash_seen = 1;
4183 }
4184 break;
4185
4186 case '.':
4187 if (strncmp (ufile, "./", 2) == 0)
4188 {
4189 if (!slash_seen)
4190 {
4191 *targ++ = '[';
4192 slash_seen = 1;
4193 }
4194 ufile++; /* skip the dot */
4195 if (index (&ufile[1], '/'))
4196 *targ++ = '.';
4197 else
4198 *targ++ = ']';
4199 }
4200 else if (strncmp (ufile, "../", 3) == 0)
4201 {
4202 if (!slash_seen)
4203 {
4204 *targ++ = '[';
4205 slash_seen = 1;
4206 }
4207 *targ++ = '-';
4208 ufile += 2; /* skip the dots */
4209 if (index (&ufile[1], '/'))
4210 *targ++ = '.';
4211 else
4212 *targ++ = ']';
4213 }
4214 else
4215 *targ++ = *ufile;
4216 break;
4217
4218 default:
4219 *targ++ = *ufile;
4220 break;
4221 }
4222 ufile++;
4223 }
4224 *targ = '\0';
177c0ea7 4225
86a5659e
JB		 4226 return utbuf;
4227}
4228
4229char *
4230getwd (pathname)
4231 char *pathname;
4232{
f4a7e5bd 4233 char *ptr, *val;
210b2b4f 4234 extern char *getcwd ();
86a5659e 4235
210b2b4f
JB		 4236#define MAXPATHLEN 1024
4237
9ac0d9e0 4238 ptr = xmalloc (MAXPATHLEN);
f4a7e5bd
RS		 4239 val = getcwd (ptr, MAXPATHLEN);
4240 if (val == 0)
4241 {
4242 xfree (ptr);
4243 return val;
4244 }
210b2b4f 4245 strcpy (pathname, ptr);
9ac0d9e0 4246 xfree (ptr);
177c0ea7 4247
210b2b4f 4248 return pathname;
86a5659e
JB		 4249}
4250
dfcf069d 4251int
86a5659e
JB		 4252getppid ()
4253{
4254 long item_code = JPI$_OWNER;
4255 unsigned long parent_id;
4256 int status;
4257
4258 if (((status = LIB$GETJPI (&item_code, 0, 0, &parent_id)) & 1) == 0)
4259 {
4260 errno = EVMSERR;
4261 vaxc$errno = status;
4262 return -1;
4263 }
4264 return parent_id;
4265}
4266
4267#undef getuid
4268unsigned
4269sys_getuid ()
4270{
4271 return (getgid () << 16) | getuid ();
4272}
4273
68c45bf0 4274#undef read
86a5659e
JB		 4275int
4276sys_read (fildes, buf, nbyte)
4277 int fildes;
4278 char *buf;
4279 unsigned int nbyte;
4280{
4281 return read (fildes, buf, (nbyte < MAXIOSIZE ? nbyte : MAXIOSIZE));
4282}
4283
4284#if 0
4285int
4286sys_write (fildes, buf, nbyte)
4287 int fildes;
4288 char *buf;
4289 unsigned int nbyte;
4290{
4291 register int nwrote, rtnval = 0;
4292
4293 while (nbyte > MAXIOSIZE && (nwrote = write (fildes, buf, MAXIOSIZE)) > 0) {
4294 nbyte -= nwrote;
4295 buf += nwrote;
4296 rtnval += nwrote;
4297 }
4298 if (nwrote < 0)
4299 return rtnval ? rtnval : -1;
4300 if ((nwrote = write (fildes, buf, nbyte)) < 0)
4301 return rtnval ? rtnval : -1;
4302 return (rtnval + nwrote);
4303}
4304#endif /* 0 */
4305
4306/*
4307 * VAX/VMS VAX C RTL really loses. It insists that records
4308 * end with a newline (carriage return) character, and if they
4309 * don't it adds one (nice of it isn't it!)
4310 *
4311 * Thus we do this stupidity below.
4312 */
4313
68c45bf0 4314#undef write
86a5659e
JB		 4315int
4316sys_write (fildes, buf, nbytes)
4317 int fildes;
4318 char *buf;
4319 unsigned int nbytes;
4320{
4321 register char *p;
4322 register char *e;
23b0668c
JB		 4323 int sum = 0;
4324 struct stat st;
4325
4326 fstat (fildes, &st);
86a5659e 4327 p = buf;
86a5659e
JB		 4328 while (nbytes > 0)
4329 {
23b0668c
JB		 4330 int len, retval;
4331
4332 /* Handle fixed-length files with carriage control. */
4333 if (st.st_fab_rfm == FAB$C_FIX
4334 && ((st.st_fab_rat & (FAB$M_FTN | FAB$M_CR)) != 0))
4335 {
4336 len = st.st_fab_mrs;
4337 retval = write (fildes, p, min (len, nbytes));
4338 if (retval != len)
4339 return -1;
4340 retval++; /* This skips the implied carriage control */
4341 }
4342 else
4343 {
4344 e = p + min (MAXIOSIZE, nbytes) - 1;
4345 while (*e != '\n' && e > p) e--;
4346 if (p == e) /* Ok.. so here we add a newline... sigh. */
4347 e = p + min (MAXIOSIZE, nbytes) - 1;
4348 len = e + 1 - p;
4349 retval = write (fildes, p, len);
4350 if (retval != len)
4351 return -1;
4352 }
4353 p += retval;
4354 sum += retval;
86a5659e
JB		 4355 nbytes -= retval;
4356 }
4357 return sum;
4358}
4359
4360/* Create file NEW copying its attributes from file OLD. If
4361 OLD is 0 or does not exist, create based on the value of
4362 vms_stmlf_recfm. */
4363
4364/* Protection value the file should ultimately have.
4365 Set by create_copy_attrs, and use by rename_sansversions. */
4366static unsigned short int fab_final_pro;
4367
4368int
4369creat_copy_attrs (old, new)
4370 char *old, *new;
4371{
4372 struct FAB fab = cc$rms_fab;
4373 struct XABPRO xabpro;
4374 char aclbuf[256]; /* Choice of size is arbitrary. See below. */
4375 extern int vms_stmlf_recfm;
4376
4377 if (old)
4378 {
4379 fab.fab$b_fac = FAB$M_GET;
4380 fab.fab$l_fna = old;
4381 fab.fab$b_fns = strlen (old);
4382 fab.fab$l_xab = (char *) &xabpro;
4383 xabpro = cc$rms_xabpro;
4384 xabpro.xab$l_aclbuf = aclbuf;
4385 xabpro.xab$w_aclsiz = sizeof aclbuf;
4386 /* Call $OPEN to fill in the fab & xabpro fields. */
986ffb24 4387 if (SYS$OPEN (&fab, 0, 0) & 1)
86a5659e 4388 {
986ffb24 4389 SYS$CLOSE (&fab, 0, 0);
86a5659e
JB		 4390 fab.fab$l_alq = 0; /* zero the allocation quantity */
4391 if (xabpro.xab$w_acllen > 0)
4392 {
4393 if (xabpro.xab$w_acllen > sizeof aclbuf)
4394 /* If the acl buffer was too short, redo open with longer one.
4395 Wouldn't need to do this if there were some system imposed
4396 limit on the size of an ACL, but I can't find any such. */
4397 {
4398 xabpro.xab$l_aclbuf = (char *) alloca (xabpro.xab$w_acllen);
4399 xabpro.xab$w_aclsiz = xabpro.xab$w_acllen;
986ffb24
JB		 4400 if (SYS$OPEN (&fab, 0, 0) & 1)
4401 SYS$CLOSE (&fab, 0, 0);
86a5659e
JB		 4402 else
4403 old = 0;
4404 }
4405 }
4406 else
4407 xabpro.xab$l_aclbuf = 0;
4408 }
4409 else
4410 old = 0;
4411 }
4412 fab.fab$l_fna = new;
4413 fab.fab$b_fns = strlen (new);
4414 if (!old)
4415 {
4416 fab.fab$l_xab = 0;
4417 fab.fab$b_rfm = vms_stmlf_recfm ? FAB$C_STMLF : FAB$C_VAR;
4418 fab.fab$b_rat = FAB$M_CR;
4419 }
4420
4421 /* Set the file protections such that we will be able to manipulate
4422 this file. Once we are done writing and renaming it, we will set
4423 the protections back. */
4424 if (old)
4425 fab_final_pro = xabpro.xab$w_pro;
4426 else
986ffb24 4427 SYS$SETDFPROT (0, &fab_final_pro);
86a5659e
JB		 4428 xabpro.xab$w_pro &= 0xff0f; /* set O:rewd for now. This is set back later. */
4429
4430 /* Create the new file with either default attrs or attrs copied
4431 from old file. */
4432 if (!(SYS$CREATE (&fab, 0, 0) & 1))
4433 return -1;
986ffb24 4434 SYS$CLOSE (&fab, 0, 0);
86a5659e
JB		 4435 /* As this is a "replacement" for creat, return a file descriptor
4436 opened for writing. */
4437 return open (new, O_WRONLY);
4438}
4439
4440#ifdef creat
4441#undef creat
4442#include <varargs.h>
4443#ifdef __GNUC__
4444#ifndef va_count
4445#define va_count(X) ((X) = *(((int *) &(va_alist)) - 1))
4446#endif
4447#endif
4448
dfcf069d 4449int
86a5659e
JB		 4450sys_creat (va_alist)
4451 va_dcl
4452{
eb8c3be9 4453 va_list list_incrementer;
86a5659e
JB		 4454 char *name;
4455 int mode;
4456 int rfd; /* related file descriptor */
4457 int fd; /* Our new file descriptor */
4458 int count;
4459 struct stat st_buf;
4460 char rfm[12];
4461 char rat[15];
4462 char mrs[13];
4463 char fsz[13];
4464 extern int vms_stmlf_recfm;
4465
4466 va_count (count);
eb8c3be9
JB		 4467 va_start (list_incrementer);
4468 name = va_arg (list_incrementer, char *);
4469 mode = va_arg (list_incrementer, int);
86a5659e 4470 if (count > 2)
eb8c3be9
JB		 4471 rfd = va_arg (list_incrementer, int);
4472 va_end (list_incrementer);
86a5659e
JB		 4473 if (count > 2)
4474 {
4475 /* Use information from the related file descriptor to set record
4476 format of the newly created file. */
4477 fstat (rfd, &st_buf);
4478 switch (st_buf.st_fab_rfm)
4479 {
4480 case FAB$C_FIX:
4481 strcpy (rfm, "rfm = fix");
4482 sprintf (mrs, "mrs = %d", st_buf.st_fab_mrs);
4483 strcpy (rat, "rat = ");
4484 if (st_buf.st_fab_rat & FAB$M_CR)
4485 strcat (rat, "cr");
4486 else if (st_buf.st_fab_rat & FAB$M_FTN)
4487 strcat (rat, "ftn");
4488 else if (st_buf.st_fab_rat & FAB$M_PRN)
4489 strcat (rat, "prn");
4490 if (st_buf.st_fab_rat & FAB$M_BLK)
4491 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4492 strcat (rat, ", blk");
4493 else
4494 strcat (rat, "blk");
4495 return creat (name, 0, rfm, rat, mrs);
4496
4497 case FAB$C_VFC:
4498 strcpy (rfm, "rfm = vfc");
4499 sprintf (fsz, "fsz = %d", st_buf.st_fab_fsz);
4500 strcpy (rat, "rat = ");
4501 if (st_buf.st_fab_rat & FAB$M_CR)
4502 strcat (rat, "cr");
4503 else if (st_buf.st_fab_rat & FAB$M_FTN)
4504 strcat (rat, "ftn");
4505 else if (st_buf.st_fab_rat & FAB$M_PRN)
4506 strcat (rat, "prn");
4507 if (st_buf.st_fab_rat & FAB$M_BLK)
4508 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4509 strcat (rat, ", blk");
4510 else
4511 strcat (rat, "blk");
4512 return creat (name, 0, rfm, rat, fsz);
4513
4514 case FAB$C_STM:
4515 strcpy (rfm, "rfm = stm");
4516 break;
4517
4518 case FAB$C_STMCR:
4519 strcpy (rfm, "rfm = stmcr");
4520 break;
4521
4522 case FAB$C_STMLF:
4523 strcpy (rfm, "rfm = stmlf");
4524 break;
4525
4526 case FAB$C_UDF:
4527 strcpy (rfm, "rfm = udf");
4528 break;
4529
4530 case FAB$C_VAR:
4531 strcpy (rfm, "rfm = var");
4532 break;
4533 }
4534 strcpy (rat, "rat = ");
4535 if (st_buf.st_fab_rat & FAB$M_CR)
4536 strcat (rat, "cr");
4537 else if (st_buf.st_fab_rat & FAB$M_FTN)
4538 strcat (rat, "ftn");
4539 else if (st_buf.st_fab_rat & FAB$M_PRN)
4540 strcat (rat, "prn");
4541 if (st_buf.st_fab_rat & FAB$M_BLK)
4542 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4543 strcat (rat, ", blk");
4544 else
4545 strcat (rat, "blk");
4546 }
4547 else
4548 {
4549 strcpy (rfm, vms_stmlf_recfm ? "rfm = stmlf" : "rfm=var");
4550 strcpy (rat, "rat=cr");
4551 }
4552 /* Until the VAX C RTL fixes the many bugs with modes, always use
4553 mode 0 to get the user's default protection. */
4554 fd = creat (name, 0, rfm, rat);
4555 if (fd < 0 && errno == EEXIST)
4556 {
4557 if (unlink (name) < 0)
4558 report_file_error ("delete", build_string (name));
4559 fd = creat (name, 0, rfm, rat);
4560 }
4561 return fd;
4562}
4563#endif /* creat */
4564
4565/* fwrite to stdout is S L O W. Speed it up by using fputc...*/
dfcf069d 4566int
86a5659e
JB		 4567sys_fwrite (ptr, size, num, fp)
4568 register char * ptr;
4569 FILE * fp;
4570{
4571 register int tot = num * size;
4572
4573 while (tot--)
4574 fputc (*ptr++, fp);
dfcf069d 4575 return num;
86a5659e
JB		 4576}
4577
4578/*
4579 * The VMS C library routine creat actually creates a new version of an
4580 * existing file rather than truncating the old version. There are times
4581 * when this is not the desired behavior, for instance, when writing an
4582 * auto save file (you only want one version), or when you don't have
4583 * write permission in the directory containing the file (but the file
177c0ea7 4584 * itself is writable). Hence this routine, which is equivalent to
86a5659e
JB		 4585 * "close (creat (fn, 0));" on Unix if fn already exists.
4586 */
4587int
4588vms_truncate (fn)
4589 char *fn;
4590{
4591 struct FAB xfab = cc$rms_fab;
4592 struct RAB xrab = cc$rms_rab;
4593 int status;
4594
4595 xfab.fab$l_fop = FAB$M_TEF; /* free allocated but unused blocks on close */
4596 xfab.fab$b_fac = FAB$M_TRN | FAB$M_GET; /* allow truncate and get access */
4597 xfab.fab$b_shr = FAB$M_NIL; /* allow no sharing - file must be locked */
4598 xfab.fab$l_fna = fn;
4599 xfab.fab$b_fns = strlen (fn);
4600 xfab.fab$l_dna = ";0"; /* default to latest version of the file */
4601 xfab.fab$b_dns = 2;
4602 xrab.rab$l_fab = &xfab;
4603
4604 /* This gibberish opens the file, positions to the first record, and
4605 deletes all records from there until the end of file. */
986ffb24 4606 if ((SYS$OPEN (&xfab) & 01) == 01)
86a5659e 4607 {
986ffb24
JB		 4608 if ((SYS$CONNECT (&xrab) & 01) == 01 &&
4609 (SYS$FIND (&xrab) & 01) == 01 &&
4610 (SYS$TRUNCATE (&xrab) & 01) == 01)
86a5659e
JB		 4611 status = 0;
4612 else
4613 status = -1;
4614 }
4615 else
4616 status = -1;
986ffb24 4617 SYS$CLOSE (&xfab);
86a5659e
JB		 4618 return status;
4619}
4620
4621/* Define this symbol to actually read SYSUAF.DAT. This requires either
4622 SYSPRV or a readable SYSUAF.DAT. */
4623
4624#ifdef READ_SYSUAF
4625/*
4626 * getuaf.c
4627 *
4628 * Routine to read the VMS User Authorization File and return
4629 * a specific user's record.
4630 */
4631
4632static struct UAF retuaf;
4633
4634struct UAF *
4635get_uaf_name (uname)
4636 char * uname;
4637{
4638 register status;
4639 struct FAB uaf_fab;
4640 struct RAB uaf_rab;
177c0ea7 4641
86a5659e
JB		 4642 uaf_fab = cc$rms_fab;
4643 uaf_rab = cc$rms_rab;
4644 /* initialize fab fields */
4645 uaf_fab.fab$l_fna = "SYS$SYSTEM:SYSUAF.DAT";
4646 uaf_fab.fab$b_fns = 21;
4647 uaf_fab.fab$b_fac = FAB$M_GET;
4648 uaf_fab.fab$b_org = FAB$C_IDX;
4649 uaf_fab.fab$b_shr = FAB$M_GET|FAB$M_PUT|FAB$M_UPD|FAB$M_DEL;
4650 /* initialize rab fields */
4651 uaf_rab.rab$l_fab = &uaf_fab;
4652 /* open the User Authorization File */
986ffb24 4653 status = SYS$OPEN (&uaf_fab);
86a5659e
JB		 4654 if (!(status&1))
4655 {
4656 errno = EVMSERR;
4657 vaxc$errno = status;
4658 return 0;
4659 }
986ffb24 4660 status = SYS$CONNECT (&uaf_rab);
86a5659e
JB		 4661 if (!(status&1))
4662 {
4663 errno = EVMSERR;
4664 vaxc$errno = status;
4665 return 0;
4666 }
4667 /* read the requested record - index is in uname */
4668 uaf_rab.rab$l_kbf = uname;
4669 uaf_rab.rab$b_ksz = strlen (uname);
4670 uaf_rab.rab$b_rac = RAB$C_KEY;
4671 uaf_rab.rab$l_ubf = (char *)&retuaf;
4672 uaf_rab.rab$w_usz = sizeof retuaf;
986ffb24 4673 status = SYS$GET (&uaf_rab);
86a5659e
JB		 4674 if (!(status&1))
4675 {
4676 errno = EVMSERR;
4677 vaxc$errno = status;
4678 return 0;
4679 }
4680 /* close the User Authorization File */
986ffb24 4681 status = SYS$DISCONNECT (&uaf_rab);
86a5659e
JB		 4682 if (!(status&1))
4683 {
4684 errno = EVMSERR;
4685 vaxc$errno = status;
4686 return 0;
4687 }
986ffb24 4688 status = SYS$CLOSE (&uaf_fab);
86a5659e
JB		 4689 if (!(status&1))
4690 {
4691 errno = EVMSERR;
4692 vaxc$errno = status;
4693 return 0;
4694 }
4695 return &retuaf;
4696}
4697
4698struct UAF *
4699get_uaf_uic (uic)
4700 unsigned long uic;
4701{
4702 register status;
4703 struct FAB uaf_fab;
4704 struct RAB uaf_rab;
177c0ea7 4705
86a5659e
JB		 4706 uaf_fab = cc$rms_fab;
4707 uaf_rab = cc$rms_rab;
4708 /* initialize fab fields */
4709 uaf_fab.fab$l_fna = "SYS$SYSTEM:SYSUAF.DAT";
4710 uaf_fab.fab$b_fns = 21;
4711 uaf_fab.fab$b_fac = FAB$M_GET;
4712 uaf_fab.fab$b_org = FAB$C_IDX;
4713 uaf_fab.fab$b_shr = FAB$M_GET|FAB$M_PUT|FAB$M_UPD|FAB$M_DEL;
4714 /* initialize rab fields */
4715 uaf_rab.rab$l_fab = &uaf_fab;
4716 /* open the User Authorization File */
986ffb24 4717 status = SYS$OPEN (&uaf_fab);
86a5659e
JB		 4718 if (!(status&1))
4719 {
4720 errno = EVMSERR;
4721 vaxc$errno = status;
4722 return 0;
4723 }
986ffb24 4724 status = SYS$CONNECT (&uaf_rab);
86a5659e
JB		 4725 if (!(status&1))
4726 {
4727 errno = EVMSERR;
4728 vaxc$errno = status;
4729 return 0;
4730 }
4731 /* read the requested record - index is in uic */
4732 uaf_rab.rab$b_krf = 1; /* 1st alternate key */
4733 uaf_rab.rab$l_kbf = (char *) &uic;
4734 uaf_rab.rab$b_ksz = sizeof uic;
4735 uaf_rab.rab$b_rac = RAB$C_KEY;
4736 uaf_rab.rab$l_ubf = (char *)&retuaf;
4737 uaf_rab.rab$w_usz = sizeof retuaf;
986ffb24 4738 status = SYS$GET (&uaf_rab);
86a5659e
JB		 4739 if (!(status&1))
4740 {
4741 errno = EVMSERR;
4742 vaxc$errno = status;
4743 return 0;
4744 }
4745 /* close the User Authorization File */
986ffb24 4746 status = SYS$DISCONNECT (&uaf_rab);
86a5659e
JB		 4747 if (!(status&1))
4748 {
4749 errno = EVMSERR;
4750 vaxc$errno = status;
4751 return 0;
4752 }
986ffb24 4753 status = SYS$CLOSE (&uaf_fab);
86a5659e
JB		 4754 if (!(status&1))
4755 {
4756 errno = EVMSERR;
4757 vaxc$errno = status;
4758 return 0;
4759 }
4760 return &retuaf;
4761}
4762
4763static struct passwd retpw;
4764
4765struct passwd *
4766cnv_uaf_pw (up)
4767 struct UAF * up;
4768{
4769 char * ptr;
4770
4771 /* copy these out first because if the username is 32 chars, the next
4772 section will overwrite the first byte of the UIC */
4773 retpw.pw_uid = up->uaf$w_mem;
4774 retpw.pw_gid = up->uaf$w_grp;
4775
ea5a0917 4776 /* I suppose this is not the best style, to possibly overwrite one
86a5659e
JB		 4777 byte beyond the end of the field, but what the heck... */
4778 ptr = &up->uaf$t_username[UAF$S_USERNAME];
4779 while (ptr[-1] == ' ')
4780 ptr--;
4781 *ptr = '\0';
4782 strcpy (retpw.pw_name, up->uaf$t_username);
4783
4784 /* the rest of these are counted ascii strings */
4785 strncpy (retpw.pw_gecos, &up->uaf$t_owner[1], up->uaf$t_owner[0]);
4786 retpw.pw_gecos[up->uaf$t_owner[0]] = '\0';
4787 strncpy (retpw.pw_dir, &up->uaf$t_defdev[1], up->uaf$t_defdev[0]);
4788 retpw.pw_dir[up->uaf$t_defdev[0]] = '\0';
4789 strncat (retpw.pw_dir, &up->uaf$t_defdir[1], up->uaf$t_defdir[0]);
4790 retpw.pw_dir[up->uaf$t_defdev[0] + up->uaf$t_defdir[0]] = '\0';
4791 strncpy (retpw.pw_shell, &up->uaf$t_defcli[1], up->uaf$t_defcli[0]);
4792 retpw.pw_shell[up->uaf$t_defcli[0]] = '\0';
4793
4794 return &retpw;
4795}
4796#else /* not READ_SYSUAF */
4797static struct passwd retpw;
4798#endif /* not READ_SYSUAF */
4799
4800struct passwd *
4801getpwnam (name)
4802 char * name;
4803{
4804#ifdef READ_SYSUAF
4805 struct UAF *up;
4806#else
4807 char * user;
4808 char * dir;
4809 unsigned char * full;
4810#endif /* READ_SYSUAF */
4811 char *ptr = name;
4812
4813 while (*ptr)
4814 {
4815 if ('a' <= *ptr && *ptr <= 'z')
4816 *ptr -= 040;
4817 ptr++;
4818 }
4819#ifdef READ_SYSUAF
4820 if (!(up = get_uaf_name (name)))
4821 return 0;
4822 return cnv_uaf_pw (up);
4823#else
4824 if (strcmp (name, getenv ("USER")) == 0)
4825 {
4826 retpw.pw_uid = getuid ();
4827 retpw.pw_gid = getgid ();
4828 strcpy (retpw.pw_name, name);
4829 if (full = egetenv ("FULLNAME"))
4830 strcpy (retpw.pw_gecos, full);
4831 else
4832 *retpw.pw_gecos = '\0';
4833 strcpy (retpw.pw_dir, egetenv ("HOME"));
4834 *retpw.pw_shell = '\0';
4835 return &retpw;
4836 }
4837 else
4838 return 0;
4839#endif /* not READ_SYSUAF */
4840}
4841
4842struct passwd *
4843getpwuid (uid)
4844 unsigned long uid;
4845{
4846#ifdef READ_SYSUAF
4847 struct UAF * up;
4848
4849 if (!(up = get_uaf_uic (uid)))
4850 return 0;
4851 return cnv_uaf_pw (up);
4852#else
4853 if (uid == sys_getuid ())
4854 return getpwnam (egetenv ("USER"));
4855 else
4856 return 0;
4857#endif /* not READ_SYSUAF */
4858}
4859
4860/* return total address space available to the current process. This is
4861 the sum of the current p0 size, p1 size and free page table entries
4862 available. */
dfcf069d 4863int
86a5659e
JB		 4864vlimit ()
4865{
4866 int item_code;
4867 unsigned long free_pages;
4868 unsigned long frep0va;
4869 unsigned long frep1va;
4870 register status;
4871
4872 item_code = JPI$_FREPTECNT;
4873 if (((status = LIB$GETJPI (&item_code, 0, 0, &free_pages)) & 1) == 0)
4874 {
4875 errno = EVMSERR;
4876 vaxc$errno = status;
4877 return -1;
4878 }
4879 free_pages *= 512;
4880
4881 item_code = JPI$_FREP0VA;
4882 if (((status = LIB$GETJPI (&item_code, 0, 0, &frep0va)) & 1) == 0)
4883 {
4884 errno = EVMSERR;
4885 vaxc$errno = status;
4886 return -1;
4887 }
4888 item_code = JPI$_FREP1VA;
4889 if (((status = LIB$GETJPI (&item_code, 0, 0, &frep1va)) & 1) == 0)
4890 {
4891 errno = EVMSERR;
4892 vaxc$errno = status;
4893 return -1;
4894 }
4895
4896 return free_pages + frep0va + (0x7fffffff - frep1va);
4897}
4898
dfcf069d 4899int
86a5659e
JB		 4900define_logical_name (varname, string)
4901 char *varname;
4902 char *string;
4903{
4904 struct dsc$descriptor_s strdsc =
4905 {strlen (string), DSC$K_DTYPE_T, DSC$K_CLASS_S, string};
4906 struct dsc$descriptor_s envdsc =
4907 {strlen (varname), DSC$K_DTYPE_T, DSC$K_CLASS_S, varname};
4908 struct dsc$descriptor_s lnmdsc =
4909 {7, DSC$K_DTYPE_T, DSC$K_CLASS_S, "LNM$JOB"};
4910
4911 return LIB$SET_LOGICAL (&envdsc, &strdsc, &lnmdsc, 0, 0);
4912}
4913
dfcf069d 4914int
86a5659e
JB		 4915delete_logical_name (varname)
4916 char *varname;
4917{
4918 struct dsc$descriptor_s envdsc =
4919 {strlen (varname), DSC$K_DTYPE_T, DSC$K_CLASS_S, varname};
4920 struct dsc$descriptor_s lnmdsc =
4921 {7, DSC$K_DTYPE_T, DSC$K_CLASS_S, "LNM$JOB"};
4922
4923 return LIB$DELETE_LOGICAL (&envdsc, &lnmdsc);
4924}
4925
dfcf069d 4926int
86a5659e 4927ulimit ()
dfcf069d
AS		 4928{
4929 return 0;
4930}
86a5659e 4931
dfcf069d 4932int
86a5659e 4933setpgrp ()
dfcf069d
AS		 4934{
4935 return 0;
4936}
86a5659e 4937
dfcf069d 4938int
86a5659e
JB		 4939execvp ()
4940{
4941 error ("execvp system call not implemented");
dfcf069d 4942 return -1;
86a5659e
JB		 4943}
4944
4945int
4946rename (from, to)
4947 char *from, *to;
4948{
4949 int status;
4950 struct FAB from_fab = cc$rms_fab, to_fab = cc$rms_fab;
4951 struct NAM from_nam = cc$rms_nam, to_nam = cc$rms_nam;
4952 char from_esn[NAM$C_MAXRSS];
4953 char to_esn[NAM$C_MAXRSS];
4954
4955 from_fab.fab$l_fna = from;
4956 from_fab.fab$b_fns = strlen (from);
4957 from_fab.fab$l_nam = &from_nam;
4958 from_fab.fab$l_fop = FAB$M_NAM;
4959
4960 from_nam.nam$l_esa = from_esn;
4961 from_nam.nam$b_ess = sizeof from_esn;
4962
4963 to_fab.fab$l_fna = to;
4964 to_fab.fab$b_fns = strlen (to);
4965 to_fab.fab$l_nam = &to_nam;
4966 to_fab.fab$l_fop = FAB$M_NAM;
4967
4968 to_nam.nam$l_esa = to_esn;
4969 to_nam.nam$b_ess = sizeof to_esn;
4970
4971 status = SYS$RENAME (&from_fab, 0, 0, &to_fab);
4972
4973 if (status & 1)
4974 return 0;
4975 else
4976 {
4977 if (status == RMS$_DEV)
4978 errno = EXDEV;
4979 else
4980 errno = EVMSERR;
4981 vaxc$errno = status;
4982 return -1;
4983 }
4984}
4985
4986/* This function renames a file like `rename', but it strips
4987 the version number from the "to" filename, such that the "to" file is
4988 will always be a new version. It also sets the file protection once it is
4989 finished. The protection that we will use is stored in fab_final_pro,
4990 and was set when we did a creat_copy_attrs to create the file that we
4991 are renaming.
4992
4993 We could use the chmod function, but Eunichs uses 3 bits per user category
eb8c3be9 4994 to describe the protection, and VMS uses 4 (write and delete are separate
86a5659e
JB		 4995 bits). To maintain portability, the VMS implementation of `chmod' wires
4996 the W and D bits together. */
4997
177c0ea7 4998
86a5659e
JB		 4999static struct fibdef fib; /* We need this initialized to zero */
5000char vms_file_written[NAM$C_MAXRSS];
5001
5002int
5003rename_sans_version (from,to)
5004 char *from, *to;
5005{
5006 short int chan;
5007 int stat;
5008 short int iosb[4];
5009 int status;
5010 struct FAB to_fab = cc$rms_fab;
5011 struct NAM to_nam = cc$rms_nam;
5012 struct dsc$descriptor fib_d ={sizeof (fib),0,0,(char*) &fib};
5013 struct dsc$descriptor fib_attr[2]
5014 = {{sizeof (fab_final_pro),ATR$C_FPRO,0,(char*) &fab_final_pro},{0,0,0,0}};
5015 char to_esn[NAM$C_MAXRSS];
5016
5017 $DESCRIPTOR (disk,to_esn);
5018
5019 to_fab.fab$l_fna = to;
5020 to_fab.fab$b_fns = strlen (to);
5021 to_fab.fab$l_nam = &to_nam;
5022 to_fab.fab$l_fop = FAB$M_NAM;
5023
5024 to_nam.nam$l_esa = to_esn;
5025 to_nam.nam$b_ess = sizeof to_esn;
5026
5027 status = SYS$PARSE (&to_fab, 0, 0); /* figure out the full file name */
5028
5029 if (to_nam.nam$l_fnb && NAM$M_EXP_VER)
5030 *(to_nam.nam$l_ver) = '\0';
5031
5032 stat = rename (from, to_esn);
5033 if (stat < 0)
5034 return stat;
5035
5036 strcpy (vms_file_written, to_esn);
5037
5038 to_fab.fab$l_fna = vms_file_written; /* this points to the versionless name */
5039 to_fab.fab$b_fns = strlen (vms_file_written);
5040
5041 /* Now set the file protection to the correct value */
986ffb24 5042 SYS$OPEN (&to_fab, 0, 0); /* This fills in the nam$w_fid fields */
86a5659e
JB		 5043
5044 /* Copy these fields into the fib */
5045 fib.fib$r_fid_overlay.fib$w_fid[0] = to_nam.nam$w_fid[0];
5046 fib.fib$r_fid_overlay.fib$w_fid[1] = to_nam.nam$w_fid[1];
5047 fib.fib$r_fid_overlay.fib$w_fid[2] = to_nam.nam$w_fid[2];
5048
986ffb24 5049 SYS$CLOSE (&to_fab, 0, 0);
86a5659e 5050
986ffb24 5051 stat = SYS$ASSIGN (&disk, &chan, 0, 0); /* open a channel to the disk */
86a5659e 5052 if (!stat)
986ffb24
JB		 5053 LIB$SIGNAL (stat);
5054 stat = SYS$QIOW (0, chan, IO$_MODIFY, iosb, 0, 0, &fib_d,
86a5659e
JB		 5055 0, 0, 0, &fib_attr, 0);
5056 if (!stat)
986ffb24
JB		 5057 LIB$SIGNAL (stat);
5058 stat = SYS$DASSGN (chan);
86a5659e 5059 if (!stat)
986ffb24 5060 LIB$SIGNAL (stat);
0137dbf7 5061 strcpy (vms_file_written, to_esn); /* We will write this to the terminal*/
86a5659e
JB		 5062 return 0;
5063}
5064
dfcf069d 5065int
86a5659e
JB		 5066link (file, new)
5067 char * file, * new;
5068{
5069 register status;
5070 struct FAB fab;
5071 struct NAM nam;
5072 unsigned short fid[3];
5073 char esa[NAM$C_MAXRSS];
5074
5075 fab = cc$rms_fab;
5076 fab.fab$l_fop = FAB$M_OFP;
5077 fab.fab$l_fna = file;
5078 fab.fab$b_fns = strlen (file);
5079 fab.fab$l_nam = &nam;
5080
5081 nam = cc$rms_nam;
5082 nam.nam$l_esa = esa;
5083 nam.nam$b_ess = NAM$C_MAXRSS;
5084
5085 status = SYS$PARSE (&fab);
5086 if ((status & 1) == 0)
5087 {
5088 errno = EVMSERR;
5089 vaxc$errno = status;
5090 return -1;
5091 }
5092 status = SYS$SEARCH (&fab);
5093 if ((status & 1) == 0)
5094 {
5095 errno = EVMSERR;
5096 vaxc$errno = status;
5097 return -1;
5098 }
5099
5100 fid[0] = nam.nam$w_fid[0];
5101 fid[1] = nam.nam$w_fid[1];
5102 fid[2] = nam.nam$w_fid[2];
5103
5104 fab.fab$l_fna = new;
5105 fab.fab$b_fns = strlen (new);
5106
5107 status = SYS$PARSE (&fab);
5108 if ((status & 1) == 0)
5109 {
5110 errno = EVMSERR;
5111 vaxc$errno = status;
5112 return -1;
5113 }
5114
5115 nam.nam$w_fid[0] = fid[0];
5116 nam.nam$w_fid[1] = fid[1];
5117 nam.nam$w_fid[2] = fid[2];
5118
5119 nam.nam$l_esa = nam.nam$l_name;
5120 nam.nam$b_esl = nam.nam$b_name + nam.nam$b_type + nam.nam$b_ver;
5121
5122 status = SYS$ENTER (&fab);
5123 if ((status & 1) == 0)
5124 {
5125 errno = EVMSERR;
5126 vaxc$errno = status;
5127 return -1;
5128 }
5129
5130 return 0;
5131}
5132
dfcf069d 5133void
86a5659e
JB		 5134croak (badfunc)
5135 char *badfunc;
5136{
5137 printf ("%s not yet implemented\r\n", badfunc);
5138 reset_sys_modes ();
5139 exit (1);
5140}
5141
5142long
5143random ()
5144{
5145 /* Arrange to return a range centered on zero. */
5146 return rand () - (1 << 30);
5147}
5148
dfcf069d 5149void
86a5659e
JB		 5150srandom (seed)
5151{
5152 srand (seed);
5153}
5154#endif /* VMS */
5155\f
b97ab886 5156#ifdef AIXHFT
86a5659e
JB		 5157
5158/* Called from init_sys_modes. */
dfcf069d 5159void
86a5659e
JB		 5160hft_init ()
5161{
5162 int junk;
5163
5164 /* If we're not on an HFT we shouldn't do any of this. We determine
5165 if we are on an HFT by trying to get an HFT error code. If this
177c0ea7 5166 call fails, we're not on an HFT. */
86a5659e
JB		 5167#ifdef IBMR2AIX
5168 if (ioctl (0, HFQERROR, &junk) < 0)
5169 return;
5170#else /* not IBMR2AIX */
5171 if (ioctl (0, HFQEIO, 0) < 0)
5172 return;
5173#endif /* not IBMR2AIX */
5174
5175 /* On AIX the default hft keyboard mapping uses backspace rather than delete
5176 as the rubout key's ASCII code. Here this is changed. The bug is that
5177 there's no way to determine the old mapping, so in reset_sys_modes
5178 we need to assume that the normal map had been present. Of course, this
5179 code also doesn't help if on a terminal emulator which doesn't understand
c4ea52a6 5180 HFT VTD's. */
86a5659e
JB		 5181 {
5182 struct hfbuf buf;
5183 struct hfkeymap keymap;
5184
5185 buf.hf_bufp = (char *)&keymap;
5186 buf.hf_buflen = sizeof (keymap);
5187 keymap.hf_nkeys = 2;
5188 keymap.hfkey[0].hf_kpos = 15;
5189 keymap.hfkey[0].hf_kstate = HFMAPCHAR | HFSHFNONE;
5190#ifdef IBMR2AIX
5191 keymap.hfkey[0].hf_keyidh = '<';
5192#else /* not IBMR2AIX */
5193 keymap.hfkey[0].hf_page = '<';
5194#endif /* not IBMR2AIX */
5195 keymap.hfkey[0].hf_char = 127;
5196 keymap.hfkey[1].hf_kpos = 15;
5197 keymap.hfkey[1].hf_kstate = HFMAPCHAR | HFSHFSHFT;
5198#ifdef IBMR2AIX
5199 keymap.hfkey[1].hf_keyidh = '<';
5200#else /* not IBMR2AIX */
5201 keymap.hfkey[1].hf_page = '<';
5202#endif /* not IBMR2AIX */
5203 keymap.hfkey[1].hf_char = 127;
5204 hftctl (0, HFSKBD, &buf);
5205 }
5206 /* The HFT system on AIX doesn't optimize for scrolling, so it's really ugly
5207 at times. */
5208 line_ins_del_ok = char_ins_del_ok = 0;
5209}
5210
c4ea52a6 5211/* Reset the rubout key to backspace. */
86a5659e 5212
dfcf069d 5213void
86a5659e
JB		 5214hft_reset ()
5215{
5216 struct hfbuf buf;
5217 struct hfkeymap keymap;
5218 int junk;
5219
5220#ifdef IBMR2AIX
5221 if (ioctl (0, HFQERROR, &junk) < 0)
5222 return;
5223#else /* not IBMR2AIX */
5224 if (ioctl (0, HFQEIO, 0) < 0)
5225 return;
5226#endif /* not IBMR2AIX */
5227
5228 buf.hf_bufp = (char *)&keymap;
5229 buf.hf_buflen = sizeof (keymap);
5230 keymap.hf_nkeys = 2;
5231 keymap.hfkey[0].hf_kpos = 15;
5232 keymap.hfkey[0].hf_kstate = HFMAPCHAR | HFSHFNONE;
5233#ifdef IBMR2AIX
5234 keymap.hfkey[0].hf_keyidh = '<';
5235#else /* not IBMR2AIX */
5236 keymap.hfkey[0].hf_page = '<';
5237#endif /* not IBMR2AIX */
5238 keymap.hfkey[0].hf_char = 8;
5239 keymap.hfkey[1].hf_kpos = 15;
5240 keymap.hfkey[1].hf_kstate = HFMAPCHAR | HFSHFSHFT;
5241#ifdef IBMR2AIX
5242 keymap.hfkey[1].hf_keyidh = '<';
5243#else /* not IBMR2AIX */
5244 keymap.hfkey[1].hf_page = '<';
5245#endif /* not IBMR2AIX */
5246 keymap.hfkey[1].hf_char = 8;
5247 hftctl (0, HFSKBD, &buf);
5248}
5249
b97ab886 5250#endif /* AIXHFT */
c238be24
RS		 5251
5252#ifdef USE_DL_STUBS
5253
5254/* These are included on Sunos 4.1 when we do not use shared libraries.
5255 X11 libraries may refer to these functions but (we hope) do not
5256 actually call them. */
5257
5258void *
5259dlopen ()
5260{
5261 return 0;
5262}
5263
5264void *
5265dlsym ()
5266{
5267 return 0;
5268}
5269
5270int
5271dlclose ()
5272{
5273 return -1;
5274}
5275
5276#endif /* USE_DL_STUBS */
51417996
RS		 5277\f
5278#ifndef BSTRING
5279
5280#ifndef bzero
5281
5282void
5283bzero (b, length)
5284 register char *b;
5285 register int length;
5286{
5287#ifdef VMS
5288 short zero = 0;
5289 long max_str = 65535;
5290
5291 while (length > max_str) {
5292 (void) LIB$MOVC5 (&zero, &zero, &zero, &max_str, b);
5293 length -= max_str;
5294 b += max_str;
5295 }
5296 max_str = length;
5297 (void) LIB$MOVC5 (&zero, &zero, &zero, &max_str, b);
5298#else
5299 while (length-- > 0)
5300 *b++ = 0;
5301#endif /* not VMS */
5302}
5303
5304#endif /* no bzero */
5305#endif /* BSTRING */
5306
c7f93f28 5307#if (!defined (BSTRING) && !defined (bcopy)) || defined (NEED_BCOPY)
51417996
RS		 5308#undef bcopy
5309
5310/* Saying `void' requires a declaration, above, where bcopy is used
5311 and that declaration causes pain for systems where bcopy is a macro. */
5312bcopy (b1, b2, length)
5313 register char *b1;
5314 register char *b2;
5315 register int length;
5316{
5317#ifdef VMS
5318 long max_str = 65535;
5319
5320 while (length > max_str) {
5321 (void) LIB$MOVC3 (&max_str, b1, b2);
5322 length -= max_str;
5323 b1 += max_str;
5324 b2 += max_str;
5325 }
5326 max_str = length;
5327 (void) LIB$MOVC3 (&length, b1, b2);
5328#else
5329 while (length-- > 0)
5330 *b2++ = *b1++;
5331#endif /* not VMS */
5332}
dfcf069d 5333#endif /* (!defined (BSTRING) && !defined (bcopy)) || defined (NEED_BCOPY) */
51417996 5334
c7f93f28 5335#ifndef BSTRING
51417996
RS		 5336#ifndef bcmp
5337int
5338bcmp (b1, b2, length) /* This could be a macro! */
5339 register char *b1;
5340 register char *b2;
5341 register int length;
5342{
5343#ifdef VMS
5344 struct dsc$descriptor_s src1 = {length, DSC$K_DTYPE_T, DSC$K_CLASS_S, b1};
5345 struct dsc$descriptor_s src2 = {length, DSC$K_DTYPE_T, DSC$K_CLASS_S, b2};
5346
5347 return STR$COMPARE (&src1, &src2);
5348#else
5349 while (length-- > 0)
5350 if (*b1++ != *b2++)
5351 return 1;
5352
5353 return 0;
5354#endif /* not VMS */
5355}
5356#endif /* no bcmp */
5357#endif /* not BSTRING */
68c45bf0
PE		 5358\f
5359#ifndef HAVE_STRSIGNAL
5360char *
5361strsignal (code)
5362 int code;
5363{
5364 char *signame = 0;
5365
5366 if (0 <= code && code < NSIG)
5367 {
5368#ifdef VMS
5369 signame = sys_errlist[code];
5370#else
5371 /* Cast to suppress warning if the table has const char *. */
5372 signame = (char *) sys_siglist[code];
5373#endif
5374 }
c4ea52a6 5375
68c45bf0
PE		 5376 return signame;
5377}
5378#endif /* HAVE_STRSIGNAL */
c4ea52a6 5379
ab5796a9
MB		 5380/* arch-tag: edb43589-4e09-4544-b325-978b5b121dcf
5381 (do not change this comment) */
Unnamed repository; edit this file 'description' to name the repository.