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Update years in copyright notice; nfc.
[bpt/emacs.git] / src / sysdep.c
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86a5659e 1/* Interfaces to system-dependent kernel and library entries.
275464e7 2 Copyright (C) 1985, 1986, 1987, 1988, 1993, 1994, 1995, 1999, 2000, 2001,
aaef169d 3 2002, 2003, 2004, 2005, 2006 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
3480d92b 259#if !defined (HAVE_GET_CURRENT_DIR_NAME) || defined (BROKEN_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{
6e5b2385 1015 if (noninteractive || read_socket_hook)
23dab951
RS		 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{
6e5b2385 1029 if (noninteractive || read_socket_hook)
23dab951
RS		 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 1046
6e5b2385 1047 if (noninteractive || read_socket_hook)
23dab951
RS		 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
6e5b2385 1059 if (noninteractive || read_socket_hook)
23dab951
RS		 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
6e5b2385 1078 if (noninteractive || read_socket_hook)
23dab951
RS		 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
6e5b2385 1093 if (noninteractive || read_socket_hook)
23dab951
RS		 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{
6e5b2385 1106 if (noninteractive || read_socket_hook)
23dab951
RS		 1107 return;
1108
86a5659e
JB		 1109 croak ("request_sigio");
1110}
177c0ea7 1111
08633194 1112void
86a5659e
JB		 1113unrequest_sigio ()
1114{
6e5b2385 1115 if (noninteractive || read_socket_hook)
23dab951
RS		 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{
6e5b2385
AS		 2238 if (noninteractive)
2239 return;
86a5659e
JB		 2240 croak ("request sigio");
2241}
2242
08633194 2243void
86a5659e
JB		 2244unrequest_sigio ()
2245{
6e5b2385
AS		 2246 if (noninteractive)
2247 return;
86a5659e
JB		 2248 croak ("unrequest sigio");
2249}
2250
2251#endif /* VMS */
2252\f
2253/* Note that VMS compiler won't accept defined (CANNOT_DUMP). */
2254#ifndef CANNOT_DUMP
2255#define NEED_STARTS
2256#endif
2257
2258#ifndef SYSTEM_MALLOC
2259#ifndef NEED_STARTS
2260#define NEED_STARTS
2261#endif
2262#endif
2263
2264#ifdef NEED_STARTS
2265/* Some systems that cannot dump also cannot implement these. */
2266
2267/*
2268 * Return the address of the start of the text segment prior to
2269 * doing an unexec. After unexec the return value is undefined.
2270 * See crt0.c for further explanation and _start.
2271 *
2272 */
2273
c0c9ac48 2274#if !(defined (__NetBSD__) && defined (__ELF__))
260fe597 2275#ifndef HAVE_TEXT_START
86a5659e
JB		 2276char *
2277start_of_text ()
2278{
2279#ifdef TEXT_START
2280 return ((char *) TEXT_START);
2281#else
2282#ifdef GOULD
2283 extern csrt ();
2284 return ((char *) csrt);
2285#else /* not GOULD */
2286 extern int _start ();
2287 return ((char *) _start);
2288#endif /* GOULD */
2289#endif /* TEXT_START */
2290}
260fe597 2291#endif /* not HAVE_TEXT_START */
c0c9ac48 2292#endif
86a5659e
JB		 2293
2294/*
2295 * Return the address of the start of the data segment prior to
2296 * doing an unexec. After unexec the return value is undefined.
2297 * See crt0.c for further information and definition of data_start.
2298 *
2299 * Apparently, on BSD systems this is etext at startup. On
2300 * USG systems (swapping) this is highly mmu dependent and
2301 * is also dependent on whether or not the program is running
2302 * with shared text. Generally there is a (possibly large)
2303 * gap between end of text and start of data with shared text.
2304 *
2305 * On Uniplus+ systems with shared text, data starts at a
2306 * fixed address. Each port (from a given oem) is generally
2307 * different, and the specific value of the start of data can
2308 * be obtained via the UniPlus+ specific "uvar" system call,
2309 * however the method outlined in crt0.c seems to be more portable.
2310 *
2311 * Probably what will have to happen when a USG unexec is available,
2312 * at least on UniPlus, is temacs will have to be made unshared so
2313 * that text and data are contiguous. Then once loadup is complete,
2314 * unexec will produce a shared executable where the data can be
ea5a0917 2315 * at the normal shared text boundary and the startofdata variable
86a5659e
JB		 2316 * will be patched by unexec to the correct value.
2317 *
2318 */
177c0ea7 2319
be3abfa2 2320#ifndef start_of_data
86a5659e
JB		 2321char *
2322start_of_data ()
2323{
2324#ifdef DATA_START
2325 return ((char *) DATA_START);
6c65530f
JB		 2326#else
2327#ifdef ORDINARY_LINK
2328 /*
2329 * This is a hack. Since we're not linking crt0.c or pre_crt0.c,
2330 * data_start isn't defined. We take the address of environ, which
2331 * is known to live at or near the start of the system crt0.c, and
2332 * we don't sweat the handful of bytes that might lose.
2333 */
2334 extern char **environ;
2335
c4ea52a6 2336 return ((char *) &environ);
86a5659e
JB		 2337#else
2338 extern int data_start;
2339 return ((char *) &data_start);
6c65530f
JB		 2340#endif /* ORDINARY_LINK */
2341#endif /* DATA_START */
86a5659e 2342}
be3abfa2 2343#endif /* start_of_data */
86a5659e 2344#endif /* NEED_STARTS (not CANNOT_DUMP or not SYSTEM_MALLOC) */
86a5659e 2345\f
c0c86835
KH		 2346/* init_system_name sets up the string for the Lisp function
2347 system-name to return. */
86a5659e
JB		 2348
2349#ifdef BSD4_1
2350#include <whoami.h>
2351#endif
2352
c0c86835 2353extern Lisp_Object Vsystem_name;
86a5659e 2354
f8a80313 2355#ifndef BSD4_1
f8a80313
RS		 2356#ifndef VMS
2357#ifdef HAVE_SOCKETS
2358#include <sys/socket.h>
2359#include <netdb.h>
2360#endif /* HAVE_SOCKETS */
2361#endif /* not VMS */
f8a80313
RS		 2362#endif /* not BSD4_1 */
2363
8581cd64
KH		 2364#ifdef TRY_AGAIN
2365#ifndef HAVE_H_ERRNO
2366extern int h_errno;
2367#endif
2368#endif /* TRY_AGAIN */
2369
c0c86835
KH		 2370void
2371init_system_name ()
86a5659e 2372{
86a5659e 2373#ifdef BSD4_1
c0c86835 2374 Vsystem_name = build_string (sysname);
67004ffb 2375#else
67004ffb 2376#ifdef VMS
c0c86835
KH		 2377 char *sp, *end;
2378 if ((sp = egetenv ("SYS$NODE")) == 0)
2379 Vsystem_name = build_string ("vax-vms");
2380 else if ((end = index (sp, ':')) == 0)
2381 Vsystem_name = build_string (sp);
2382 else
2383 Vsystem_name = make_string (sp, end - sp);
67004ffb 2384#else
210b2b4f 2385#ifndef HAVE_GETHOSTNAME
c0c86835
KH		 2386 struct utsname uts;
2387 uname (&uts);
2388 Vsystem_name = build_string (uts.nodename);
67004ffb 2389#else /* HAVE_GETHOSTNAME */
cc6e7269 2390 unsigned int hostname_size = 256;
c0c86835
KH		 2391 char *hostname = (char *) alloca (hostname_size);
2392
2393 /* Try to get the host name; if the buffer is too short, try
2394 again. Apparently, the only indication gethostname gives of
2395 whether the buffer was large enough is the presence or absence
2396 of a '\0' in the string. Eech. */
2397 for (;;)
2398 {
2399 gethostname (hostname, hostname_size - 1);
2400 hostname[hostname_size - 1] = '\0';
2401
2402 /* Was the buffer large enough for the '\0'? */
2403 if (strlen (hostname) < hostname_size - 1)
2404 break;
2405
2406 hostname_size <<= 1;
2407 hostname = (char *) alloca (hostname_size);
2408 }
67004ffb 2409#ifdef HAVE_SOCKETS
c0c86835
KH		 2410 /* Turn the hostname into the official, fully-qualified hostname.
2411 Don't do this if we're going to dump; this can confuse system
2412 libraries on some machines and make the dumped emacs core dump. */
67004ffb 2413#ifndef CANNOT_DUMP
c0c86835 2414 if (initialized)
67004ffb 2415#endif /* not CANNOT_DUMP */
960d894c
KH		 2416 if (! index (hostname, '.'))
2417 {
2418 struct hostent *hp;
2419 int count;
2420 for (count = 0;; count++)
2421 {
e24f1d55 2422#ifdef TRY_AGAIN
960d894c 2423 h_errno = 0;
e24f1d55 2424#endif
960d894c 2425 hp = gethostbyname (hostname);
efa04277 2426#ifdef TRY_AGAIN
960d894c
KH		 2427 if (! (hp == 0 && h_errno == TRY_AGAIN))
2428#endif
2429 break;
2430 if (count >= 5)
2431 break;
2432 Fsleep_for (make_number (1), Qnil);
2433 }
2434 if (hp)
2435 {
2436 char *fqdn = (char *) hp->h_name;
7c15926f 2437#if 0
960d894c 2438 char *p;
7c15926f 2439#endif
960d894c
KH		 2440
2441 if (!index (fqdn, '.'))
2442 {
2443 /* We still don't have a fully qualified domain name.
2444 Try to find one in the list of alternate names */
2445 char **alias = hp->h_aliases;
2446 while (*alias && !index (*alias, '.'))
2447 alias++;
2448 if (*alias)
2449 fqdn = *alias;
2450 }
2451 hostname = fqdn;
ab1649fe 2452#if 0
960d894c
KH		 2453 /* Convert the host name to lower case. */
2454 /* Using ctype.h here would introduce a possible locale
2455 dependence that is probably wrong for hostnames. */
2456 p = hostname;
2457 while (*p)
2458 {
2459 if (*p >= 'A' && *p <= 'Z')
2460 *p += 'a' - 'A';
2461 p++;
2462 }
2463#endif
2464 }
2465 }
67004ffb 2466#endif /* HAVE_SOCKETS */
6250a9db
KH		 2467 /* We used to try using getdomainname here,
2468 but NIIBE Yutaka <gniibe@etl.go.jp> says that
0b93aa53
RS		 2469 getdomainname gets the NIS/YP domain which often is not the same
2470 as in Internet domain name. */
6250a9db
KH		 2471#if 0 /* Turned off because sysinfo is not really likely to return the
2472 correct Internet domain. */
0b93aa53 2473#if (HAVE_SYSINFO && defined (SI_SRPC_DOMAIN))
b05af5d3
PE		 2474 if (! index (hostname, '.'))
2475 {
2476 /* The hostname is not fully qualified. Append the domain name. */
2477
2478 int hostlen = strlen (hostname);
2479 int domain_size = 256;
2480
2481 for (;;)
2482 {
825e7e55
RS		 2483 char *domain = (char *) alloca (domain_size + 1);
2484 char *fqdn = (char *) alloca (hostlen + 1 + domain_size + 1);
b05af5d3
PE		 2485 int sys_domain_size = sysinfo (SI_SRPC_DOMAIN, domain, domain_size);
2486 if (sys_domain_size <= 0)
2487 break;
2488 if (domain_size < sys_domain_size)
2489 {
2490 domain_size = sys_domain_size;
2491 continue;
2492 }
b05af5d3 2493 strcpy (fqdn, hostname);
825e7e55
RS		 2494 if (domain[0] == '.')
2495 strcpy (fqdn + hostlen, domain);
9b80a5aa 2496 else if (domain[0] != 0)
825e7e55
RS		 2497 {
2498 fqdn[hostlen] = '.';
2499 strcpy (fqdn + hostlen + 1, domain);
2500 }
b05af5d3
PE		 2501 hostname = fqdn;
2502 break;
2503 }
2504 }
0b93aa53 2505#endif /* HAVE_SYSINFO && defined (SI_SRPC_DOMAIN) */
6250a9db 2506#endif /* 0 */
c0c86835 2507 Vsystem_name = build_string (hostname);
67004ffb 2508#endif /* HAVE_GETHOSTNAME */
210b2b4f 2509#endif /* VMS */
67004ffb 2510#endif /* BSD4_1 */
c0c86835
KH		 2511 {
2512 unsigned char *p;
d5db4077 2513 for (p = SDATA (Vsystem_name); *p; p++)
c0c86835
KH		 2514 if (*p == ' ' || *p == '\t')
2515 *p = '-';
2516 }
67004ffb 2517}
86a5659e 2518\f
7964ba9e 2519#ifndef MSDOS
86a5659e 2520#ifndef VMS
86d1f23a 2521#if !defined (HAVE_SELECT) || defined (BROKEN_SELECT_NON_X)
86a5659e 2522
86d1f23a
KH		 2523#include "sysselect.h"
2524#undef select
2525
2526#if defined (HAVE_X_WINDOWS) && !defined (HAVE_SELECT)
86a5659e
JB		 2527/* Cause explanatory error message at compile time,
2528 since the select emulation is not good enough for X. */
2529int *x = &x_windows_lose_if_no_select_system_call;
2530#endif
2531
2532/* Emulate as much as select as is possible under 4.1 and needed by Gnu Emacs
2533 * Only checks read descriptors.
2534 */
2535/* How long to wait between checking fds in select */
2536#define SELECT_PAUSE 1
2537int select_alarmed;
2538
2539/* For longjmp'ing back to read_input_waiting. */
2540
2541jmp_buf read_alarm_throw;
2542
2543/* Nonzero if the alarm signal should throw back to read_input_waiting.
2544 The read_socket_hook function sets this to 1 while it is waiting. */
2545
2546int read_alarm_should_throw;
2547
2548SIGTYPE
2549select_alarm ()
2550{
2551 select_alarmed = 1;
2552#ifdef BSD4_1
2553 sigrelse (SIGALRM);
2554#else /* not BSD4_1 */
2555 signal (SIGALRM, SIG_IGN);
2556#endif /* not BSD4_1 */
333f1b6f 2557 SIGNAL_THREAD_CHECK (SIGALRM);
86a5659e
JB		 2558 if (read_alarm_should_throw)
2559 longjmp (read_alarm_throw, 1);
2560}
2561
fe03522b 2562#ifndef WINDOWSNT
86a5659e
JB		 2563/* Only rfds are checked. */
2564int
86d1f23a 2565sys_select (nfds, rfds, wfds, efds, timeout)
86a5659e 2566 int nfds;
86d1f23a
KH		 2567 SELECT_TYPE *rfds, *wfds, *efds;
2568 EMACS_TIME *timeout;
86a5659e 2569{
ffdcc91d 2570 int ravail = 0;
86d1f23a
KH		 2571 SELECT_TYPE orfds;
2572 int timeoutval;
2573 int *local_timeout;
86a5659e
JB		 2574 extern int proc_buffered_char[];
2575#ifndef subprocesses
2576 int process_tick = 0, update_tick = 0;
2577#else
2578 extern int process_tick, update_tick;
2579#endif
86a5659e
JB		 2580 unsigned char buf;
2581
86d1f23a
KH		 2582#if defined (HAVE_SELECT) && defined (HAVE_X_WINDOWS)
2583 /* If we're using X, then the native select will work; we only need the
2584 emulation for non-X usage. */
2585 if (!NILP (Vwindow_system))
2586 return select (nfds, rfds, wfds, efds, timeout);
2587#endif
2588 timeoutval = timeout ? EMACS_SECS (*timeout) : 100000;
2589 local_timeout = &timeoutval;
2590 FD_ZERO (&orfds);
86a5659e
JB		 2591 if (rfds)
2592 {
2593 orfds = *rfds;
86d1f23a 2594 FD_ZERO (rfds);
86a5659e
JB		 2595 }
2596 if (wfds)
86d1f23a 2597 FD_ZERO (wfds);
86a5659e 2598 if (efds)
86d1f23a 2599 FD_ZERO (efds);
86a5659e
JB		 2600
2601 /* If we are looking only for the terminal, with no timeout,
2602 just read it and wait -- that's more efficient. */
86d1f23a
KH		 2603 if (*local_timeout == 100000 && process_tick == update_tick
2604 && FD_ISSET (0, &orfds))
86a5659e 2605 {
86d1f23a
KH		 2606 int fd;
2607 for (fd = 1; fd < nfds; ++fd)
2608 if (FD_ISSET (fd, &orfds))
2609 goto hardway;
86a5659e
JB		 2610 if (! detect_input_pending ())
2611 read_input_waiting ();
86d1f23a 2612 FD_SET (0, rfds);
86a5659e
JB		 2613 return 1;
2614 }
2615
86d1f23a 2616 hardway:
86a5659e
JB		 2617 /* Once a second, till the timer expires, check all the flagged read
2618 * descriptors to see if any input is available. If there is some then
2619 * set the corresponding bit in the return copy of rfds.
177c0ea7 2620 */
86a5659e
JB		 2621 while (1)
2622 {
86d1f23a 2623 register int to_check, fd;
86a5659e
JB		 2624
2625 if (rfds)
2626 {
86d1f23a 2627 for (to_check = nfds, fd = 0; --to_check >= 0; fd++)
86a5659e 2628 {
86d1f23a 2629 if (FD_ISSET (fd, &orfds))
86a5659e
JB		 2630 {
2631 int avail = 0, status = 0;
2632
86d1f23a 2633 if (fd == 0)
86a5659e
JB		 2634 avail = detect_input_pending (); /* Special keyboard handler */
2635 else
2636 {
2637#ifdef FIONREAD
2638 status = ioctl (fd, FIONREAD, &avail);
2639#else /* no FIONREAD */
2640 /* Hoping it will return -1 if nothing available
2641 or 0 if all 0 chars requested are read. */
2642 if (proc_buffered_char[fd] >= 0)
2643 avail = 1;
2644 else
2645 {
2646 avail = read (fd, &buf, 1);
2647 if (avail > 0)
2648 proc_buffered_char[fd] = buf;
2649 }
2650#endif /* no FIONREAD */
2651 }
2652 if (status >= 0 && avail > 0)
2653 {
86d1f23a 2654 FD_SET (fd, rfds);
86a5659e
JB		 2655 ravail++;
2656 }
2657 }
2658 }
2659 }
2660 if (*local_timeout == 0 || ravail != 0 || process_tick != update_tick)
2661 break;
ffdcc91d
GM		 2662
2663 turn_on_atimers (0);
2664 signal (SIGALRM, select_alarm);
86a5659e
JB		 2665 select_alarmed = 0;
2666 alarm (SELECT_PAUSE);
177c0ea7 2667
86a5659e
JB		 2668 /* Wait for a SIGALRM (or maybe a SIGTINT) */
2669 while (select_alarmed == 0 && *local_timeout != 0
2670 && process_tick == update_tick)
2671 {
2672 /* If we are interested in terminal input,
2673 wait by reading the terminal.
2674 That makes instant wakeup for terminal input at least. */
86d1f23a 2675 if (FD_ISSET (0, &orfds))
86a5659e
JB		 2676 {
2677 read_input_waiting ();
2678 if (detect_input_pending ())
2679 select_alarmed = 1;
2680 }
2681 else
2682 pause ();
2683 }
2684 (*local_timeout) -= SELECT_PAUSE;
177c0ea7 2685
ffdcc91d
GM		 2686 /* Reset the old alarm if there was one. */
2687 turn_on_atimers (1);
177c0ea7 2688
86a5659e
JB		 2689 if (*local_timeout == 0) /* Stop on timer being cleared */
2690 break;
2691 }
2692 return ravail;
2693}
fe03522b 2694#endif /* not WINDOWSNT */
86a5659e
JB		 2695
2696/* Read keyboard input into the standard buffer,
2697 waiting for at least one character. */
2698
dfcf069d 2699void
86a5659e
JB		 2700read_input_waiting ()
2701{
34567704
JB		 2702 int nread, i;
2703 extern int quit_char;
86a5659e
JB		 2704
2705 if (read_socket_hook)
2706 {
9f893fc6
KS		 2707 struct input_event hold_quit;
2708
2709 EVENT_INIT (hold_quit);
2710 hold_quit.kind = NO_EVENT;
2711
86a5659e
JB		 2712 read_alarm_should_throw = 0;
2713 if (! setjmp (read_alarm_throw))
9f893fc6 2714 nread = (*read_socket_hook) (0, 1, &hold_quit);
86a5659e
JB		 2715 else
2716 nread = -1;
f4a7e5bd 2717
9f893fc6
KS		 2718 if (hold_quit.kind != NO_EVENT)
2719 kbd_buffer_store_event (&hold_quit);
86a5659e
JB		 2720 }
2721 else
86a5659e 2722 {
50acda85 2723 struct input_event e;
f4a7e5bd
RS		 2724 char buf[3];
2725 nread = read (fileno (stdin), buf, 1);
50acda85 2726 EVENT_INIT (e);
f4a7e5bd
RS		 2727
2728 /* Scan the chars for C-g and store them in kbd_buffer. */
e43bd4f5 2729 e.kind = ASCII_KEYSTROKE_EVENT;
2d064114 2730 e.frame_or_window = selected_frame;
f4a7e5bd
RS		 2731 e.modifiers = 0;
2732 for (i = 0; i < nread; i++)
a00d5589 2733 {
f4a7e5bd
RS		 2734 /* Convert chars > 0177 to meta events if desired.
2735 We do this under the same conditions that read_avail_input does. */
2736 if (read_socket_hook == 0)
2737 {
2738 /* If the user says she has a meta key, then believe her. */
2739 if (meta_key == 1 && (buf[i] & 0x80))
2740 e.modifiers = meta_modifier;
2741 if (meta_key != 2)
2742 buf[i] &= ~0x80;
2743 }
b95520f5 2744
c81d47b4 2745 XSETINT (e.code, buf[i]);
f4a7e5bd
RS		 2746 kbd_buffer_store_event (&e);
2747 /* Don't look at input that follows a C-g too closely.
2748 This reduces lossage due to autorepeat on C-g. */
2749 if (buf[i] == quit_char)
2750 break;
2751 }
86a5659e
JB		 2752 }
2753}
2754
2755#endif /* not HAVE_SELECT */
2756#endif /* not VMS */
7964ba9e 2757#endif /* not MSDOS */
86a5659e
JB		 2758\f
2759#ifdef BSD4_1
08633194 2760void
23dab951
RS		 2761init_sigio (fd)
2762 int fd;
86a5659e
JB		 2763{
2764 if (noninteractive)
2765 return;
2766 lmode = LINTRUP | lmode;
23dab951 2767 ioctl (fd, TIOCLSET, &lmode);
86a5659e
JB		 2768}
2769
dfcf069d 2770void
86a5659e
JB		 2771reset_sigio ()
2772{
2773 if (noninteractive)
2774 return;
2775 lmode = ~LINTRUP & lmode;
2776 ioctl (0, TIOCLSET, &lmode);
2777}
2778
08633194 2779void
86a5659e
JB		 2780request_sigio ()
2781{
6e5b2385
AS		 2782 if (noninteractive)
2783 return;
86a5659e
JB		 2784 sigrelse (SIGTINT);
2785
2786 interrupts_deferred = 0;
2787}
2788
08633194 2789void
86a5659e
JB		 2790unrequest_sigio ()
2791{
6e5b2385
AS		 2792 if (noninteractive)
2793 return;
86a5659e
JB		 2794 sighold (SIGTINT);
2795
2796 interrupts_deferred = 1;
2797}
2798
2799/* still inside #ifdef BSD4_1 */
2800#ifdef subprocesses
2801
2802int sigheld; /* Mask of held signals */
2803
dfcf069d 2804void
86a5659e
JB		 2805sigholdx (signum)
2806 int signum;
2807{
2808 sigheld |= sigbit (signum);
2809 sighold (signum);
2810}
2811
dfcf069d 2812void
86a5659e
JB		 2813sigisheld (signum)
2814 int signum;
2815{
2816 sigheld |= sigbit (signum);
2817}
2818
dfcf069d 2819void
86a5659e
JB		 2820sigunhold (signum)
2821 int signum;
2822{
2823 sigheld &= ~sigbit (signum);
2824 sigrelse (signum);
2825}
2826
dfcf069d 2827void
86a5659e
JB		 2828sigfree () /* Free all held signals */
2829{
2830 int i;
2831 for (i = 0; i < NSIG; i++)
2832 if (sigheld & sigbit (i))
2833 sigrelse (i);
2834 sigheld = 0;
2835}
2836
dfcf069d 2837int
86a5659e
JB		 2838sigbit (i)
2839{
2840 return 1 << (i - 1);
2841}
2842#endif /* subprocesses */
2843#endif /* BSD4_1 */
2844\f
2845/* POSIX signals support - DJB */
2846/* Anyone with POSIX signals should have ANSI C declarations */
2847
2848#ifdef POSIX_SIGNALS
2849
c639b0e3 2850sigset_t empty_mask, full_mask;
86a5659e 2851
86a5659e
JB		 2852signal_handler_t
2853sys_signal (int signal_number, signal_handler_t action)
2854{
c639b0e3 2855 struct sigaction new_action, old_action;
86a5659e 2856 sigemptyset (&new_action.sa_mask);
e5c99298 2857 new_action.sa_handler = action;
275464e7 2858#if defined (SA_RESTART) && ! defined (BROKEN_SA_RESTART) && !defined(SYNC_INPUT)
25ab68af 2859 /* Emacs mostly works better with restartable system services. If this
55fafcf0
RS		 2860 flag exists, we probably want to turn it on here.
2861 However, on some systems this resets the timeout of `select'
2862 which means that `select' never finishes if it keeps getting signals.
2863 BROKEN_SA_RESTART is defined on those systems. */
275464e7
SM		 2864 /* It's not clear why the comment above says "mostly works better". --Stef
2865 When SYNC_INPUT is set, we don't want SA_RESTART because we need to poll
2866 for pending input so we need long-running syscalls to be interrupted
2867 after a signal that sets the interrupt_input_pending flag. */
25ab68af
RS		 2868 new_action.sa_flags = SA_RESTART;
2869#else
4a785b6e 2870 new_action.sa_flags = 0;
25ab68af 2871#endif
d32b2f3c 2872 sigaction (signal_number, &new_action, &old_action);
e5c99298 2873 return (old_action.sa_handler);
86a5659e
JB		 2874}
2875
e065a56e
JB		 2876#ifndef __GNUC__
2877/* If we're compiling with GCC, we don't need this function, since it
2878 can be written as a macro. */
2879sigset_t
2880sys_sigmask (int sig)
2881{
2882 sigset_t mask;
2883 sigemptyset (&mask);
2884 sigaddset (&mask, sig);
2885 return mask;
2886}
2887#endif
2888
86a5659e
JB		 2889/* I'd like to have these guys return pointers to the mask storage in here,
2890 but there'd be trouble if the code was saving multiple masks. I'll be
2891 safe and pass the structure. It normally won't be more than 2 bytes
2892 anyhow. - DJB */
2893
2894sigset_t
2895sys_sigblock (sigset_t new_mask)
2896{
2897 sigset_t old_mask;
2898 sigprocmask (SIG_BLOCK, &new_mask, &old_mask);
2899 return (old_mask);
2900}
2901
2902sigset_t
2903sys_sigunblock (sigset_t new_mask)
2904{
2905 sigset_t old_mask;
2906 sigprocmask (SIG_UNBLOCK, &new_mask, &old_mask);
2907 return (old_mask);
2908}
2909
2910sigset_t
2911sys_sigsetmask (sigset_t new_mask)
2912{
2913 sigset_t old_mask;
2914 sigprocmask (SIG_SETMASK, &new_mask, &old_mask);
2915 return (old_mask);
2916}
2917
2918#endif /* POSIX_SIGNALS */
2919\f
b80263be 2920#if !defined HAVE_STRSIGNAL && !HAVE_DECL_SYS_SIGLIST
ca9c0567
PE		 2921static char *my_sys_siglist[NSIG];
2922# ifdef sys_siglist
2923# undef sys_siglist
2924# endif
2925# define sys_siglist my_sys_siglist
2926#endif
2927
2928void
2929init_signals ()
2930{
2931#ifdef POSIX_SIGNALS
2932 sigemptyset (&empty_mask);
2933 sigfillset (&full_mask);
2934#endif
2935
b80263be 2936#if !defined HAVE_STRSIGNAL && !HAVE_DECL_SYS_SIGLIST
ca9c0567
PE		 2937 if (! initialized)
2938 {
2939# ifdef SIGABRT
2940 sys_siglist[SIGABRT] = "Aborted";
2941# endif
2942# ifdef SIGAIO
2943 sys_siglist[SIGAIO] = "LAN I/O interrupt";
2944# endif
2945# ifdef SIGALRM
2946 sys_siglist[SIGALRM] = "Alarm clock";
2947# endif
2948# ifdef SIGBUS
2949 sys_siglist[SIGBUS] = "Bus error";
2950# endif
2951# ifdef SIGCLD
2952 sys_siglist[SIGCLD] = "Child status changed";
2953# endif
2954# ifdef SIGCHLD
2955 sys_siglist[SIGCHLD] = "Child status changed";
2956# endif
2957# ifdef SIGCONT
2958 sys_siglist[SIGCONT] = "Continued";
2959# endif
2960# ifdef SIGDANGER
2961 sys_siglist[SIGDANGER] = "Swap space dangerously low";
2962# endif
2963# ifdef SIGDGNOTIFY
2964 sys_siglist[SIGDGNOTIFY] = "Notification message in queue";
2965# endif
2966# ifdef SIGEMT
2967 sys_siglist[SIGEMT] = "Emulation trap";
2968# endif
2969# ifdef SIGFPE
2970 sys_siglist[SIGFPE] = "Arithmetic exception";
2971# endif
2972# ifdef SIGFREEZE
2973 sys_siglist[SIGFREEZE] = "SIGFREEZE";
2974# endif
2975# ifdef SIGGRANT
2976 sys_siglist[SIGGRANT] = "Monitor mode granted";
2977# endif
2978# ifdef SIGHUP
2979 sys_siglist[SIGHUP] = "Hangup";
2980# endif
2981# ifdef SIGILL
2982 sys_siglist[SIGILL] = "Illegal instruction";
2983# endif
2984# ifdef SIGINT
2985 sys_siglist[SIGINT] = "Interrupt";
2986# endif
2987# ifdef SIGIO
2988 sys_siglist[SIGIO] = "I/O possible";
2989# endif
2990# ifdef SIGIOINT
2991 sys_siglist[SIGIOINT] = "I/O intervention required";
2992# endif
2993# ifdef SIGIOT
2994 sys_siglist[SIGIOT] = "IOT trap";
2995# endif
2996# ifdef SIGKILL
2997 sys_siglist[SIGKILL] = "Killed";
2998# endif
2999# ifdef SIGLOST
3000 sys_siglist[SIGLOST] = "Resource lost";
3001# endif
3002# ifdef SIGLWP
3003 sys_siglist[SIGLWP] = "SIGLWP";
3004# endif
3005# ifdef SIGMSG
3006 sys_siglist[SIGMSG] = "Monitor mode data available";
3007# endif
3008# ifdef SIGPHONE
3009 sys_siglist[SIGWIND] = "SIGPHONE";
3010# endif
3011# ifdef SIGPIPE
3012 sys_siglist[SIGPIPE] = "Broken pipe";
3013# endif
3014# ifdef SIGPOLL
3015 sys_siglist[SIGPOLL] = "Pollable event occurred";
3016# endif
3017# ifdef SIGPROF
3018 sys_siglist[SIGPROF] = "Profiling timer expired";
3019# endif
3020# ifdef SIGPTY
3021 sys_siglist[SIGPTY] = "PTY I/O interrupt";
3022# endif
3023# ifdef SIGPWR
3024 sys_siglist[SIGPWR] = "Power-fail restart";
3025# endif
3026# ifdef SIGQUIT
3027 sys_siglist[SIGQUIT] = "Quit";
3028# endif
3029# ifdef SIGRETRACT
3030 sys_siglist[SIGRETRACT] = "Need to relinguish monitor mode";
3031# endif
3032# ifdef SIGSAK
3033 sys_siglist[SIGSAK] = "Secure attention";
3034# endif
3035# ifdef SIGSEGV
3036 sys_siglist[SIGSEGV] = "Segmentation violation";
3037# endif
3038# ifdef SIGSOUND
3039 sys_siglist[SIGSOUND] = "Sound completed";
3040# endif
3041# ifdef SIGSTOP
3042 sys_siglist[SIGSTOP] = "Stopped (signal)";
3043# endif
3044# ifdef SIGSTP
3045 sys_siglist[SIGSTP] = "Stopped (user)";
3046# endif
3047# ifdef SIGSYS
3048 sys_siglist[SIGSYS] = "Bad argument to system call";
3049# endif
3050# ifdef SIGTERM
3051 sys_siglist[SIGTERM] = "Terminated";
3052# endif
3053# ifdef SIGTHAW
3054 sys_siglist[SIGTHAW] = "SIGTHAW";
3055# endif
3056# ifdef SIGTRAP
3057 sys_siglist[SIGTRAP] = "Trace/breakpoint trap";
3058# endif
3059# ifdef SIGTSTP
3060 sys_siglist[SIGTSTP] = "Stopped (user)";
3061# endif
3062# ifdef SIGTTIN
3063 sys_siglist[SIGTTIN] = "Stopped (tty input)";
3064# endif
3065# ifdef SIGTTOU
3066 sys_siglist[SIGTTOU] = "Stopped (tty output)";
3067# endif
3068# ifdef SIGURG
3069 sys_siglist[SIGURG] = "Urgent I/O condition";
3070# endif
3071# ifdef SIGUSR1
3072 sys_siglist[SIGUSR1] = "User defined signal 1";
3073# endif
3074# ifdef SIGUSR2
3075 sys_siglist[SIGUSR2] = "User defined signal 2";
3076# endif
3077# ifdef SIGVTALRM
3078 sys_siglist[SIGVTALRM] = "Virtual timer expired";
3079# endif
3080# ifdef SIGWAITING
3081 sys_siglist[SIGWAITING] = "Process's LWPs are blocked";
3082# endif
3083# ifdef SIGWINCH
3084 sys_siglist[SIGWINCH] = "Window size changed";
3085# endif
3086# ifdef SIGWIND
3087 sys_siglist[SIGWIND] = "SIGWIND";
3088# endif
3089# ifdef SIGXCPU
3090 sys_siglist[SIGXCPU] = "CPU time limit exceeded";
3091# endif
3092# ifdef SIGXFSZ
3093 sys_siglist[SIGXFSZ] = "File size limit exceeded";
3094# endif
3095 }
b80263be 3096#endif /* !defined HAVE_STRSIGNAL && !defined HAVE_DECL_SYS_SIGLIST */
ca9c0567
PE		 3097}
3098\f
9927a7b1 3099#ifndef HAVE_RANDOM
4bb8c8b7
KH		 3100#ifdef random
3101#define HAVE_RANDOM
3102#endif
3103#endif
3104
3105/* Figure out how many bits the system's random number generator uses.
3106 `random' and `lrand48' are assumed to return 31 usable bits.
3107 BSD `rand' returns a 31 bit value but the low order bits are unusable;
3108 so we'll shift it and treat it like the 15-bit USG `rand'. */
3109
3110#ifndef RAND_BITS
3111# ifdef HAVE_RANDOM
3112# define RAND_BITS 31
3113# else /* !HAVE_RANDOM */
3114# ifdef HAVE_LRAND48
3115# define RAND_BITS 31
3116# define random lrand48
3117# else /* !HAVE_LRAND48 */
3118# define RAND_BITS 15
3119# if RAND_MAX == 32767
3120# define random rand
3121# else /* RAND_MAX != 32767 */
3122# if RAND_MAX == 2147483647
3123# define random() (rand () >> 16)
3124# else /* RAND_MAX != 2147483647 */
3125# ifdef USG
3126# define random rand
3127# else
3128# define random() (rand () >> 16)
2a633456 3129# endif /* !USG */
4bb8c8b7
KH		 3130# endif /* RAND_MAX != 2147483647 */
3131# endif /* RAND_MAX != 32767 */
3132# endif /* !HAVE_LRAND48 */
3133# endif /* !HAVE_RANDOM */
3134#endif /* !RAND_BITS */
2e46c7c6 3135
4bb8c8b7
KH		 3136void
3137seed_random (arg)
3138 long arg;
86a5659e 3139{
4bb8c8b7
KH		 3140#ifdef HAVE_RANDOM
3141 srandom ((unsigned int)arg);
f8b53a82 3142#else
4bb8c8b7 3143# ifdef HAVE_LRAND48
76425a49 3144 srand48 (arg);
4bb8c8b7
KH		 3145# else
3146 srand ((unsigned int)arg);
3147# endif
2e46c7c6 3148#endif
86a5659e
JB		 3149}
3150
4bb8c8b7
KH		 3151/*
3152 * Build a full Emacs-sized word out of whatever we've got.
3153 * This suffices even for a 64-bit architecture with a 15-bit rand.
3154 */
3155long
3156get_random ()
3157{
3158 long val = random ();
3159#if VALBITS > RAND_BITS
3160 val = (val << RAND_BITS) ^ random ();
3161#if VALBITS > 2*RAND_BITS
3162 val = (val << RAND_BITS) ^ random ();
3163#if VALBITS > 3*RAND_BITS
3164 val = (val << RAND_BITS) ^ random ();
3165#if VALBITS > 4*RAND_BITS
3166 val = (val << RAND_BITS) ^ random ();
3167#endif /* need at least 5 */
3168#endif /* need at least 4 */
3169#endif /* need at least 3 */
3170#endif /* need at least 2 */
3171 return val & ((1L << VALBITS) - 1);
3172}
86a5659e
JB		 3173\f
3174#ifdef WRONG_NAME_INSQUE
3175
3176insque (q,p)
3177 caddr_t q,p;
3178{
3179 _insque (q,p);
3180}
3181
3182#endif
3183\f
3184#ifdef VMS
3185
3186#ifdef getenv
3187/* If any place else asks for the TERM variable,
3188 allow it to be overridden with the EMACS_TERM variable
3189 before attempting to translate the logical name TERM. As a last
3190 resort, ask for VAX C's special idea of the TERM variable. */
3191#undef getenv
3192char *
3193sys_getenv (name)
3194 char *name;
3195{
3196 register char *val;
3197 static char buf[256];
3198 static struct dsc$descriptor_s equiv
3199 = {sizeof (buf), DSC$K_DTYPE_T, DSC$K_CLASS_S, buf};
3200 static struct dsc$descriptor_s d_name
3201 = {0, DSC$K_DTYPE_T, DSC$K_CLASS_S, 0};
3202 short eqlen;
3203
3204 if (!strcmp (name, "TERM"))
3205 {
3206 val = (char *) getenv ("EMACS_TERM");
3207 if (val)
3208 return val;
3209 }
3210
3211 d_name.dsc$w_length = strlen (name);
3212 d_name.dsc$a_pointer = name;
986ffb24 3213 if (LIB$SYS_TRNLOG (&d_name, &eqlen, &equiv) == 1)
86a5659e
JB		 3214 {
3215 char *str = (char *) xmalloc (eqlen + 1);
3216 bcopy (buf, str, eqlen);
3217 str[eqlen] = '\0';
3218 /* This is a storage leak, but a pain to fix. With luck,
3219 no one will ever notice. */
3220 return str;
3221 }
3222 return (char *) getenv (name);
3223}
3224#endif /* getenv */
3225
3226#ifdef abort
3227/* Since VMS doesn't believe in core dumps, the only way to debug this beast is
3228 to force a call on the debugger from within the image. */
3229#undef abort
3230sys_abort ()
3231{
3232 reset_sys_modes ();
3233 LIB$SIGNAL (SS$_DEBUG);
3234}
3235#endif /* abort */
3236#endif /* VMS */
3237\f
3238#ifdef VMS
3239#ifdef LINK_CRTL_SHARE
ea5a0917 3240#ifdef SHARABLE_LIB_BUG
eb8c3be9 3241/* Variables declared noshare and initialized in sharable libraries
86a5659e
JB		 3242 cannot be shared. The VMS linker incorrectly forces you to use a private
3243 version which is uninitialized... If not for this "feature", we
3244 could use the C library definition of sys_nerr and sys_errlist. */
3245int sys_nerr = 35;
3246char *sys_errlist[] =
3247 {
3248 "error 0",
3249 "not owner",
3250 "no such file or directory",
3251 "no such process",
3252 "interrupted system call",
3253 "i/o error",
3254 "no such device or address",
3255 "argument list too long",
3256 "exec format error",
3257 "bad file number",
3258 "no child process",
3259 "no more processes",
3260 "not enough memory",
3261 "permission denied",
3262 "bad address",
3263 "block device required",
3264 "mount devices busy",
3265 "file exists",
3266 "cross-device link",
3267 "no such device",
3268 "not a directory",
3269 "is a directory",
3270 "invalid argument",
3271 "file table overflow",
3272 "too many open files",
3273 "not a typewriter",
3274 "text file busy",
3275 "file too big",
3276 "no space left on device",
3277 "illegal seek",
3278 "read-only file system",
3279 "too many links",
3280 "broken pipe",
3281 "math argument",
3282 "result too large",
3283 "I/O stream empty",
3284 "vax/vms specific error code nontranslatable error"
3285 };
ea5a0917 3286#endif /* SHARABLE_LIB_BUG */
86a5659e
JB		 3287#endif /* LINK_CRTL_SHARE */
3288#endif /* VMS */
7088d1ca
RM		 3289
3290#ifndef HAVE_STRERROR
fe03522b 3291#ifndef WINDOWSNT
7088d1ca
RM		 3292char *
3293strerror (errnum)
3294 int errnum;
3295{
3296 extern char *sys_errlist[];
3297 extern int sys_nerr;
3298
3299 if (errnum >= 0 && errnum < sys_nerr)
3300 return sys_errlist[errnum];
3301 return (char *) "Unknown error";
3302}
fe03522b 3303#endif /* not WINDOWSNT */
7088d1ca 3304#endif /* ! HAVE_STRERROR */
86a5659e 3305\f
86a5659e 3306int
68c45bf0 3307emacs_open (path, oflag, mode)
8c2ba7de 3308 const char *path;
86a5659e
JB		 3309 int oflag, mode;
3310{
3311 register int rtnval;
68c45bf0
PE		 3312
3313#ifdef BSD4_1
177c0ea7 3314 if (oflag & O_CREAT)
68c45bf0
PE		 3315 return creat (path, mode);
3316#endif
177c0ea7 3317
86a5659e 3318 while ((rtnval = open (path, oflag, mode)) == -1
275464e7
SM		 3319 && (errno == EINTR))
3320 QUIT;
86a5659e
JB		 3321 return (rtnval);
3322}
3323
dfcf069d 3324int
68c45bf0 3325emacs_close (fd)
86a5659e
JB		 3326 int fd;
3327{
fe111daf 3328 int did_retry = 0;
86a5659e
JB		 3329 register int rtnval;
3330
3331 while ((rtnval = close (fd)) == -1
fe111daf
KH		 3332 && (errno == EINTR))
3333 did_retry = 1;
3334
3335 /* If close is interrupted SunOS 4.1 may or may not have closed the
3336 file descriptor. If it did the second close will fail with
3337 errno = EBADF. That means we have succeeded. */
3338 if (rtnval == -1 && did_retry && errno == EBADF)
3339 return 0;
3340
86a5659e
JB		 3341 return rtnval;
3342}
3343
86a5659e 3344int
68c45bf0 3345emacs_read (fildes, buf, nbyte)
86a5659e
JB		 3346 int fildes;
3347 char *buf;
3348 unsigned int nbyte;
3349{
3350 register int rtnval;
177c0ea7 3351
86a5659e 3352 while ((rtnval = read (fildes, buf, nbyte)) == -1
275464e7
SM		 3353 && (errno == EINTR))
3354 QUIT;
86a5659e
JB		 3355 return (rtnval);
3356}
3357
3358int
68c45bf0 3359emacs_write (fildes, buf, nbyte)
86a5659e 3360 int fildes;
7b1cc119 3361 const char *buf;
86a5659e
JB		 3362 unsigned int nbyte;
3363{
b95520f5 3364 register int rtnval, bytes_written;
86a5659e 3365
b95520f5
BF		 3366 bytes_written = 0;
3367
3368 while (nbyte > 0)
3369 {
3370 rtnval = write (fildes, buf, nbyte);
3371
3372 if (rtnval == -1)
3373 {
3374 if (errno == EINTR)
77220eeb
SM		 3375 {
3376#ifdef SYNC_INPUT
3377 /* I originally used `QUIT' but that might causes files to
3378 be truncated if you hit C-g in the middle of it. --Stef */
3379 if (interrupt_input_pending)
3380 handle_async_input ();
3381#endif
3382 continue;
3383 }
b95520f5 3384 else
aa670904 3385 return (bytes_written ? bytes_written : -1);
b95520f5
BF		 3386 }
3387
3388 buf += rtnval;
3389 nbyte -= rtnval;
3390 bytes_written += rtnval;
3391 }
3392 return (bytes_written);
86a5659e 3393}
86a5659e
JB		 3394\f
3395#ifdef USG
3396/*
3397 * All of the following are for USG.
3398 *
3399 * On USG systems the system calls are INTERRUPTIBLE by signals
3400 * that the user program has elected to catch. Thus the system call
3401 * must be retried in these cases. To handle this without massive
3402 * changes in the source code, we remap the standard system call names
3403 * to names for our own functions in sysdep.c that do the system call
3404 * with retries. Actually, for portability reasons, it is good
3405 * programming practice, as this example shows, to limit all actual
eb8c3be9 3406 * system calls to a single occurrence in the source. Sure, this
86a5659e
JB		 3407 * adds an extra level of function call overhead but it is almost
3408 * always negligible. Fred Fish, Unisoft Systems Inc.
3409 */
3410
86a5659e
JB		 3411/*
3412 * Warning, this function may not duplicate 4.2 action properly
3413 * under error conditions.
3414 */
3415
3416#ifndef MAXPATHLEN
3417/* In 4.1, param.h fails to define this. */
3418#define MAXPATHLEN 1024
3419#endif
3420
3421#ifndef HAVE_GETWD
3422
3423char *
3424getwd (pathname)
3425 char *pathname;
3426{
3427 char *npath, *spath;
3428 extern char *getcwd ();
3429
9ac0d9e0 3430 BLOCK_INPUT; /* getcwd uses malloc */
86a5659e 3431 spath = npath = getcwd ((char *) 0, MAXPATHLEN);
f4a7e5bd 3432 if (spath == 0)
18b6bc73
GM		 3433 {
3434 UNBLOCK_INPUT;
3435 return spath;
3436 }
86a5659e
JB		 3437 /* On Altos 3068, getcwd can return @hostname/dir, so discard
3438 up to first slash. Should be harmless on other systems. */
3439 while (*npath && *npath != '/')
3440 npath++;
3441 strcpy (pathname, npath);
3442 free (spath); /* getcwd uses malloc */
9ac0d9e0 3443 UNBLOCK_INPUT;
86a5659e
JB		 3444 return pathname;
3445}
3446
3447#endif /* HAVE_GETWD */
3448
3449/*
3450 * Emulate rename using unlink/link. Note that this is
3451 * only partially correct. Also, doesn't enforce restriction
3452 * that files be of same type (regular->regular, dir->dir, etc).
3453 */
3454
4746118a
JB		 3455#ifndef HAVE_RENAME
3456
86a5659e 3457rename (from, to)
19c7afdf
JB		 3458 const char *from;
3459 const char *to;
86a5659e
JB		 3460{
3461 if (access (from, 0) == 0)
3462 {
3463 unlink (to);
3464 if (link (from, to) == 0)
3465 if (unlink (from) == 0)
3466 return (0);
3467 }
3468 return (-1);
3469}
3470
4746118a
JB		 3471#endif
3472
86a5659e
JB		 3473
3474#ifdef HPUX
3475#ifndef HAVE_PERROR
3476
3477/* HPUX curses library references perror, but as far as we know
3478 it won't be called. Anyway this definition will do for now. */
3479
3480perror ()
3481{
3482}
3483
3484#endif /* not HAVE_PERROR */
3485#endif /* HPUX */
3486
3487#ifndef HAVE_DUP2
3488
3489/*
3490 * Emulate BSD dup2. First close newd if it already exists.
3491 * Then, attempt to dup oldd. If not successful, call dup2 recursively
3492 * until we are, then close the unsuccessful ones.
3493 */
3494
3495dup2 (oldd, newd)
3496 int oldd;
3497 int newd;
3498{
3499 register int fd, ret;
177c0ea7 3500
68c45bf0 3501 emacs_close (newd);
86a5659e
JB		 3502
3503#ifdef F_DUPFD
68c45bf0 3504 return fcntl (oldd, F_DUPFD, newd);
86a5659e
JB		 3505#else
3506 fd = dup (old);
3507 if (fd == -1)
3508 return -1;
3509 if (fd == new)
3510 return new;
3511 ret = dup2 (old,new);
68c45bf0 3512 emacs_close (fd);
86a5659e
JB		 3513 return ret;
3514#endif
3515}
3516
3517#endif /* not HAVE_DUP2 */
3518
3519/*
3520 * Gettimeofday. Simulate as much as possible. Only accurate
3521 * to nearest second. Emacs doesn't use tzp so ignore it for now.
3522 * Only needed when subprocesses are defined.
3523 */
3524
3525#ifdef subprocesses
3526#ifndef VMS
3527#ifndef HAVE_GETTIMEOFDAY
3528#ifdef HAVE_TIMEVAL
177c0ea7 3529
86a5659e 3530/* ARGSUSED */
dfcf069d 3531int
86a5659e
JB		 3532gettimeofday (tp, tzp)
3533 struct timeval *tp;
3534 struct timezone *tzp;
3535{
3536 extern long time ();
3537
177c0ea7 3538 tp->tv_sec = time ((long *)0);
86a5659e 3539 tp->tv_usec = 0;
4ca7594f
RS		 3540 if (tzp != 0)
3541 tzp->tz_minuteswest = -1;
dfcf069d 3542 return 0;
86a5659e 3543}
177c0ea7 3544
86a5659e
JB		 3545#endif
3546#endif
3547#endif
3548#endif /* subprocess && !HAVE_GETTIMEOFDAY && HAVE_TIMEVAL && !VMS */
177c0ea7 3549
86a5659e
JB		 3550/*
3551 * This function will go away as soon as all the stubs fixed. (fnf)
3552 */
3553
dfcf069d 3554void
86a5659e
JB		 3555croak (badfunc)
3556 char *badfunc;
3557{
3558 printf ("%s not yet implemented\r\n", badfunc);
3559 reset_sys_modes ();
3560 exit (1);
3561}
3562
3563#endif /* USG */
3564\f
86a5659e
JB		 3565/* Directory routines for systems that don't have them. */
3566
3567#ifdef SYSV_SYSTEM_DIR
3568
3569#include <dirent.h>
3570
c4ea52a6 3571#if defined (BROKEN_CLOSEDIR) || !defined (HAVE_CLOSEDIR)
cfdc57af 3572
86a5659e
JB		 3573int
3574closedir (dirp)
3575 register DIR *dirp; /* stream from opendir */
3576{
cfdc57af
RS		 3577 int rtnval;
3578
68c45bf0 3579 rtnval = emacs_close (dirp->dd_fd);
1b929d25 3580
65aa44ac
JB		 3581 /* Some systems (like Solaris) allocate the buffer and the DIR all
3582 in one block. Why in the world are we freeing this ourselves
3583 anyway? */
3584#if ! (defined (sun) && defined (USG5_4))
3585 xfree ((char *) dirp->dd_buf); /* directory block defined in <dirent.h> */
3586#endif
9ac0d9e0 3587 xfree ((char *) dirp);
cfdc57af
RS		 3588
3589 return rtnval;
86a5659e 3590}
1db6401c 3591#endif /* BROKEN_CLOSEDIR or not HAVE_CLOSEDIR */
86a5659e
JB		 3592#endif /* SYSV_SYSTEM_DIR */
3593
3594#ifdef NONSYSTEM_DIR_LIBRARY
3595
3596DIR *
3597opendir (filename)
3598 char *filename; /* name of directory */
3599{
3600 register DIR *dirp; /* -> malloc'ed storage */
3601 register int fd; /* file descriptor for read */
3602 struct stat sbuf; /* result of fstat */
3603
68c45bf0 3604 fd = emacs_open (filename, O_RDONLY, 0);
86a5659e
JB		 3605 if (fd < 0)
3606 return 0;
3607
9ac0d9e0 3608 BLOCK_INPUT;
86a5659e
JB		 3609 if (fstat (fd, &sbuf) < 0
3610 || (sbuf.st_mode & S_IFMT) != S_IFDIR
7f77dbe3 3611 || (dirp = (DIR *) xmalloc (sizeof (DIR))) == 0)
86a5659e 3612 {
68c45bf0 3613 emacs_close (fd);
9ac0d9e0 3614 UNBLOCK_INPUT;
86a5659e
JB		 3615 return 0; /* bad luck today */
3616 }
9ac0d9e0 3617 UNBLOCK_INPUT;
86a5659e
JB		 3618
3619 dirp->dd_fd = fd;
3620 dirp->dd_loc = dirp->dd_size = 0; /* refill needed */
3621
3622 return dirp;
3623}
3624
3625void
3626closedir (dirp)
3627 register DIR *dirp; /* stream from opendir */
3628{
68c45bf0 3629 emacs_close (dirp->dd_fd);
9ac0d9e0 3630 xfree ((char *) dirp);
86a5659e
JB		 3631}
3632
3633
3634#ifndef VMS
3635#define DIRSIZ 14
3636struct olddir
3637 {
3638 ino_t od_ino; /* inode */
3639 char od_name[DIRSIZ]; /* filename */
3640 };
3641#endif /* not VMS */
3642
3643struct direct dir_static; /* simulated directory contents */
3644
3645/* ARGUSED */
3646struct direct *
3647readdir (dirp)
3648 register DIR *dirp; /* stream from opendir */
3649{
3650#ifndef VMS
3651 register struct olddir *dp; /* -> directory data */
3652#else /* VMS */
3653 register struct dir$_name *dp; /* -> directory data */
3654 register struct dir$_version *dv; /* -> version data */
3655#endif /* VMS */
3656
3657 for (; ;)
3658 {
3659 if (dirp->dd_loc >= dirp->dd_size)
3660 dirp->dd_loc = dirp->dd_size = 0;
3661
3662 if (dirp->dd_size == 0 /* refill buffer */
68c45bf0 3663 && (dirp->dd_size = emacs_read (dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ)) <= 0)
86a5659e
JB		 3664 return 0;
3665
3666#ifndef VMS
3667 dp = (struct olddir *) &dirp->dd_buf[dirp->dd_loc];
3668 dirp->dd_loc += sizeof (struct olddir);
3669
3670 if (dp->od_ino != 0) /* not deleted entry */
3671 {
3672 dir_static.d_ino = dp->od_ino;
3673 strncpy (dir_static.d_name, dp->od_name, DIRSIZ);
3674 dir_static.d_name[DIRSIZ] = '\0';
3675 dir_static.d_namlen = strlen (dir_static.d_name);
3676 dir_static.d_reclen = sizeof (struct direct)
3677 - MAXNAMLEN + 3
3678 + dir_static.d_namlen - dir_static.d_namlen % 4;
3679 return &dir_static; /* -> simulated structure */
3680 }
3681#else /* VMS */
3682 dp = (struct dir$_name *) dirp->dd_buf;
3683 if (dirp->dd_loc == 0)
3684 dirp->dd_loc = (dp->dir$b_namecount&1) ? dp->dir$b_namecount + 1
3685 : dp->dir$b_namecount;
3686 dv = (struct dir$_version *)&dp->dir$t_name[dirp->dd_loc];
3687 dir_static.d_ino = dv->dir$w_fid_num;
3688 dir_static.d_namlen = dp->dir$b_namecount;
3689 dir_static.d_reclen = sizeof (struct direct)
3690 - MAXNAMLEN + 3
3691 + dir_static.d_namlen - dir_static.d_namlen % 4;
3692 strncpy (dir_static.d_name, dp->dir$t_name, dp->dir$b_namecount);
3693 dir_static.d_name[dir_static.d_namlen] = '\0';
3694 dirp->dd_loc = dirp->dd_size; /* only one record at a time */
3695 return &dir_static;
3696#endif /* VMS */
3697 }
3698}
3699
3700#ifdef VMS
3701/* readdirver is just like readdir except it returns all versions of a file
3702 as separate entries. */
3703
3704/* ARGUSED */
3705struct direct *
3706readdirver (dirp)
3707 register DIR *dirp; /* stream from opendir */
3708{
3709 register struct dir$_name *dp; /* -> directory data */
3710 register struct dir$_version *dv; /* -> version data */
3711
3712 if (dirp->dd_loc >= dirp->dd_size - sizeof (struct dir$_name))
3713 dirp->dd_loc = dirp->dd_size = 0;
3714
3715 if (dirp->dd_size == 0 /* refill buffer */
3716 && (dirp->dd_size = sys_read (dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ)) <= 0)
3717 return 0;
3718
3719 dp = (struct dir$_name *) dirp->dd_buf;
3720 if (dirp->dd_loc == 0)
3721 dirp->dd_loc = (dp->dir$b_namecount & 1) ? dp->dir$b_namecount + 1
3722 : dp->dir$b_namecount;
3723 dv = (struct dir$_version *) &dp->dir$t_name[dirp->dd_loc];
3724 strncpy (dir_static.d_name, dp->dir$t_name, dp->dir$b_namecount);
3725 sprintf (&dir_static.d_name[dp->dir$b_namecount], ";%d", dv->dir$w_version);
3726 dir_static.d_namlen = strlen (dir_static.d_name);
3727 dir_static.d_ino = dv->dir$w_fid_num;
3728 dir_static.d_reclen = sizeof (struct direct) - MAXNAMLEN + 3
3729 + dir_static.d_namlen - dir_static.d_namlen % 4;
3730 dirp->dd_loc = ((char *) (++dv) - dp->dir$t_name);
3731 return &dir_static;
3732}
3733
3734#endif /* VMS */
3735
3736#endif /* NONSYSTEM_DIR_LIBRARY */
23524fb9
JB		 3737
3738\f
53ea491a 3739int
061ea326 3740set_file_times (filename, atime, mtime)
8c2ba7de 3741 const char *filename;
53ea491a
KH		 3742 EMACS_TIME atime, mtime;
3743{
3744#ifdef HAVE_UTIMES
3745 struct timeval tv[2];
3746 tv[0] = atime;
3747 tv[1] = mtime;
8334eb21
RS		 3748 return utimes (filename, tv);
3749#else /* not HAVE_UTIMES */
53ea491a
KH		 3750 struct utimbuf utb;
3751 utb.actime = EMACS_SECS (atime);
3752 utb.modtime = EMACS_SECS (mtime);
8334eb21
RS		 3753 return utime (filename, &utb);
3754#endif /* not HAVE_UTIMES */
53ea491a
KH		 3755}
3756\f
23524fb9
JB		 3757/* mkdir and rmdir functions, for systems which don't have them. */
3758
3759#ifndef HAVE_MKDIR
3760/*
3761 * Written by Robert Rother, Mariah Corporation, August 1985.
3762 *
3763 * If you want it, it's yours. All I ask in return is that if you
3764 * figure out how to do this in a Bourne Shell script you send me
3765 * a copy.
3766 * sdcsvax!rmr or rmr@uscd
3767 *
3768 * Severely hacked over by John Gilmore to make a 4.2BSD compatible
3769 * subroutine. 11Mar86; hoptoad!gnu
3770 *
3771 * Modified by rmtodd@uokmax 6-28-87 -- when making an already existing dir,
3772 * subroutine didn't return EEXIST. It does now.
3773 */
3774
3775/*
3776 * Make a directory.
3777 */
f3892946
RS		 3778#ifdef MKDIR_PROTOTYPE
3779MKDIR_PROTOTYPE
3780#else
23524fb9
JB		 3781int
3782mkdir (dpath, dmode)
3783 char *dpath;
3784 int dmode;
f3892946 3785#endif
23524fb9 3786{
039f26a4 3787 int cpid, status, fd;
23524fb9
JB		 3788 struct stat statbuf;
3789
3790 if (stat (dpath, &statbuf) == 0)
3791 {
3792 errno = EEXIST; /* Stat worked, so it already exists */
3793 return -1;
3794 }
3795
3796 /* If stat fails for a reason other than non-existence, return error */
3797 if (errno != ENOENT)
3798 return -1;
3799
039f26a4 3800 synch_process_alive = 1;
23524fb9
JB		 3801 switch (cpid = fork ())
3802 {
3803
039f26a4 3804 case -1: /* Error in fork */
23524fb9
JB		 3805 return (-1); /* Errno is set already */
3806
3807 case 0: /* Child process */
3808 /*
3809 * Cheap hack to set mode of new directory. Since this
3810 * child process is going away anyway, we zap its umask.
3811 * FIXME, this won't suffice to set SUID, SGID, etc. on this
3812 * directory. Does anybody care?
3813 */
3814 status = umask (0); /* Get current umask */
3815 status = umask (status | (0777 & ~dmode)); /* Set for mkdir */
68c45bf0 3816 fd = emacs_open ("/dev/null", O_RDWR, 0);
039f26a4
RS		 3817 if (fd >= 0)
3818 {
3819 dup2 (fd, 0);
3820 dup2 (fd, 1);
3821 dup2 (fd, 2);
3822 }
23524fb9
JB		 3823 execl ("/bin/mkdir", "mkdir", dpath, (char *) 0);
3824 _exit (-1); /* Can't exec /bin/mkdir */
3825
3826 default: /* Parent process */
039f26a4 3827 wait_for_termination (cpid);
23524fb9
JB		 3828 }
3829
6b0824c9
JD		 3830 if (synch_process_death != 0 || synch_process_retcode != 0
3831 || synch_process_termsig != 0)
23524fb9
JB		 3832 {
3833 errno = EIO; /* We don't know why, but */
3834 return -1; /* /bin/mkdir failed */
3835 }
3836
3837 return 0;
3838}
3839#endif /* not HAVE_MKDIR */
3840
3841#ifndef HAVE_RMDIR
3842int
3843rmdir (dpath)
3844 char *dpath;
3845{
039f26a4 3846 int cpid, status, fd;
23524fb9
JB		 3847 struct stat statbuf;
3848
3849 if (stat (dpath, &statbuf) != 0)
3850 {
3851 /* Stat just set errno. We don't have to */
3852 return -1;
3853 }
3854
039f26a4 3855 synch_process_alive = 1;
23524fb9
JB		 3856 switch (cpid = fork ())
3857 {
3858
039f26a4 3859 case -1: /* Error in fork */
23524fb9
JB		 3860 return (-1); /* Errno is set already */
3861
3862 case 0: /* Child process */
68c45bf0 3863 fd = emacs_open ("/dev/null", O_RDWR, 0);
039f26a4
RS		 3864 if (fd >= 0)
3865 {
3866 dup2 (fd, 0);
3867 dup2 (fd, 1);
3868 dup2 (fd, 2);
3869 }
f560db78
RS		 3870 execl ("/bin/rmdir", "rmdir", dpath, (char *) 0);
3871 _exit (-1); /* Can't exec /bin/rmdir */
3872
207bdbdb 3873 default: /* Parent process */
f560db78 3874 wait_for_termination (cpid);
23524fb9
JB		 3875 }
3876
6b0824c9
JD		 3877 if (synch_process_death != 0 || synch_process_retcode != 0
3878 || synch_process_termsig != 0)
23524fb9
JB		 3879 {
3880 errno = EIO; /* We don't know why, but */
f560db78 3881 return -1; /* /bin/rmdir failed */
23524fb9
JB		 3882 }
3883
3884 return 0;
3885}
3886#endif /* !HAVE_RMDIR */
3887
3888
86a5659e
JB		 3889\f
3890/* Functions for VMS */
3891#ifdef VMS
86a5659e
JB		 3892#include <acldef.h>
3893#include <chpdef.h>
3894#include <jpidef.h>
3895
3896/* Return as a string the VMS error string pertaining to STATUS.
3897 Reuses the same static buffer each time it is called. */
3898
3899char *
3900vmserrstr (status)
3901 int status; /* VMS status code */
3902{
3903 int bufadr[2];
3904 short len;
3905 static char buf[257];
3906
3907 bufadr[0] = sizeof buf - 1;
3908 bufadr[1] = (int) buf;
3909 if (! (SYS$GETMSG (status, &len, bufadr, 0x1, 0) & 1))
3910 return "untranslatable VMS error status";
3911 buf[len] = '\0';
3912 return buf;
3913}
3914
3915#ifdef access
3916#undef access
177c0ea7 3917
86a5659e
JB		 3918/* The following is necessary because 'access' emulation by VMS C (2.0) does
3919 * not work correctly. (It also doesn't work well in version 2.3.)
3920 */
3921
3922#ifdef VMS4_4
3923
3924#define DESCRIPTOR(name,string) struct dsc$descriptor_s name = \
3925 { strlen (string), DSC$K_DTYPE_T, DSC$K_CLASS_S, string }
3926
3927typedef union {
3928 struct {
3929 unsigned short s_buflen;
3930 unsigned short s_code;
3931 char *s_bufadr;
3932 unsigned short *s_retlenadr;
3933 } s;
3934 int end;
3935} item;
3936#define buflen s.s_buflen
3937#define code s.s_code
3938#define bufadr s.s_bufadr
3939#define retlenadr s.s_retlenadr
3940
3941#define R_OK 4 /* test for read permission */
3942#define W_OK 2 /* test for write permission */
3943#define X_OK 1 /* test for execute (search) permission */
3944#define F_OK 0 /* test for presence of file */
3945
3946int
3947sys_access (path, mode)
3948 char *path;
3949 int mode;
3950{
3951 static char *user = NULL;
3952 char dir_fn[512];
3953
3954 /* translate possible directory spec into .DIR file name, so brain-dead
3955 * access can treat the directory like a file. */
3956 if (directory_file_name (path, dir_fn))
3957 path = dir_fn;
177c0ea7 3958
86a5659e
JB		 3959 if (mode == F_OK)
3960 return access (path, mode);
3961 if (user == NULL && (user = (char *) getenv ("USER")) == NULL)
3962 return -1;
3963 {
3964 int stat;
3965 int flags;
3966 int acces;
3967 unsigned short int dummy;
3968 item itemlst[3];
3969 static int constant = ACL$C_FILE;
3970 DESCRIPTOR (path_desc, path);
3971 DESCRIPTOR (user_desc, user);
177c0ea7 3972
86a5659e
JB		 3973 flags = 0;
3974 acces = 0;
3975 if ((mode & X_OK) && ((stat = access (path, mode)) < 0 || mode == X_OK))
3976 return stat;
3977 if (mode & R_OK)
3978 acces |= CHP$M_READ;
3979 if (mode & W_OK)
3980 acces |= CHP$M_WRITE;
3981 itemlst[0].buflen = sizeof (int);
3982 itemlst[0].code = CHP$_FLAGS;
3983 itemlst[0].bufadr = (char *) &flags;
3984 itemlst[0].retlenadr = &dummy;
3985 itemlst[1].buflen = sizeof (int);
3986 itemlst[1].code = CHP$_ACCESS;
3987 itemlst[1].bufadr = (char *) &acces;
3988 itemlst[1].retlenadr = &dummy;
3989 itemlst[2].end = CHP$_END;
3990 stat = SYS$CHECK_ACCESS (&constant, &path_desc, &user_desc, itemlst);
3991 return stat == SS$_NORMAL ? 0 : -1;
3992 }
3993}
3994
3995#else /* not VMS4_4 */
3996
3997#include <prvdef.h>
fe03522b
RS		 3998#define ACE$M_WRITE 2
3999#define ACE$C_KEYID 1
86a5659e
JB		 4000
4001static unsigned short memid, grpid;
4002static unsigned int uic;
4003
4004/* Called from init_sys_modes, so it happens not very often
4005 but at least each time Emacs is loaded. */
dfcf069d 4006void
86a5659e
JB		 4007sys_access_reinit ()
4008{
4009 uic = 0;
4010}
4011
4012int
4013sys_access (filename, type)
4014 char * filename;
4015 int type;
4016{
4017 struct FAB fab;
4018 struct XABPRO xab;
4019 int status, size, i, typecode, acl_controlled;
4020 unsigned int *aclptr, *aclend, aclbuf[60];
4021 union prvdef prvmask;
4022
4023 /* Get UIC and GRP values for protection checking. */
4024 if (uic == 0)
4025 {
4026 status = LIB$GETJPI (&JPI$_UIC, 0, 0, &uic, 0, 0);
4027 if (! (status & 1))
4028 return -1;
4029 memid = uic & 0xFFFF;
4030 grpid = uic >> 16;
4031 }
4032
fe03522b 4033 if (type != 2) /* not checking write access */
86a5659e
JB		 4034 return access (filename, type);
4035
4036 /* Check write protection. */
177c0ea7 4037
fe03522b 4038#define CHECKPRIV(bit) (prvmask.bit)
ea5a0917 4039#define WRITABLE(field) (! ((xab.xab$w_pro >> field) & XAB$M_NOWRITE))
86a5659e
JB		 4040
4041 /* Find privilege bits */
986ffb24 4042 status = SYS$SETPRV (0, 0, 0, prvmask);
86a5659e
JB		 4043 if (! (status & 1))
4044 error ("Unable to find privileges: %s", vmserrstr (status));
4045 if (CHECKPRIV (PRV$V_BYPASS))
4046 return 0; /* BYPASS enabled */
4047 fab = cc$rms_fab;
4048 fab.fab$b_fac = FAB$M_GET;
4049 fab.fab$l_fna = filename;
4050 fab.fab$b_fns = strlen (filename);
4051 fab.fab$l_xab = &xab;
4052 xab = cc$rms_xabpro;
4053 xab.xab$l_aclbuf = aclbuf;
4054 xab.xab$w_aclsiz = sizeof (aclbuf);
986ffb24 4055 status = SYS$OPEN (&fab, 0, 0);
86a5659e
JB		 4056 if (! (status & 1))
4057 return -1;
986ffb24 4058 SYS$CLOSE (&fab, 0, 0);
86a5659e 4059 /* Check system access */
ea5a0917 4060 if (CHECKPRIV (PRV$V_SYSPRV) && WRITABLE (XAB$V_SYS))
86a5659e
JB		 4061 return 0;
4062 /* Check ACL entries, if any */
4063 acl_controlled = 0;
4064 if (xab.xab$w_acllen > 0)
4065 {
4066 aclptr = aclbuf;
4067 aclend = &aclbuf[xab.xab$w_acllen / 4];
4068 while (*aclptr && aclptr < aclend)
4069 {
4070 size = (*aclptr & 0xff) / 4;
4071 typecode = (*aclptr >> 8) & 0xff;
4072 if (typecode == ACE$C_KEYID)
4073 for (i = size - 1; i > 1; i--)
4074 if (aclptr[i] == uic)
4075 {
4076 acl_controlled = 1;
4077 if (aclptr[1] & ACE$M_WRITE)
4078 return 0; /* Write access through ACL */
4079 }
4080 aclptr = &aclptr[size];
4081 }
4082 if (acl_controlled) /* ACL specified, prohibits write access */
4083 return -1;
4084 }
4085 /* No ACL entries specified, check normal protection */
ea5a0917 4086 if (WRITABLE (XAB$V_WLD)) /* World writable */
86a5659e 4087 return 0;
ea5a0917 4088 if (WRITABLE (XAB$V_GRP) &&
86a5659e 4089 (unsigned short) (xab.xab$l_uic >> 16) == grpid)
ea5a0917
KH		 4090 return 0; /* Group writable */
4091 if (WRITABLE (XAB$V_OWN) &&
86a5659e 4092 (xab.xab$l_uic & 0xFFFF) == memid)
ea5a0917 4093 return 0; /* Owner writable */
86a5659e 4094
ea5a0917 4095 return -1; /* Not writable */
86a5659e
JB		 4096}
4097#endif /* not VMS4_4 */
4098#endif /* access */
177c0ea7 4099
86a5659e
JB		 4100static char vtbuf[NAM$C_MAXRSS+1];
4101
4102/* translate a vms file spec to a unix path */
4103char *
4104sys_translate_vms (vfile)
4105 char * vfile;
4106{
4107 char * p;
4108 char * targ;
4109
4110 if (!vfile)
4111 return 0;
4112
4113 targ = vtbuf;
4114
4115 /* leading device or logical name is a root directory */
4116 if (p = strchr (vfile, ':'))
4117 {
4118 *targ++ = '/';
4119 while (vfile < p)
4120 *targ++ = *vfile++;
4121 vfile++;
4122 *targ++ = '/';
4123 }
4124 p = vfile;
4125 if (*p == '[' || *p == '<')
4126 {
4127 while (*++vfile != *p + 2)
4128 switch (*vfile)
4129 {
4130 case '.':
4131 if (vfile[-1] == *p)
4132 *targ++ = '.';
4133 *targ++ = '/';
4134 break;
4135
4136 case '-':
4137 *targ++ = '.';
4138 *targ++ = '.';
4139 break;
177c0ea7 4140
86a5659e
JB		 4141 default:
4142 *targ++ = *vfile;
4143 break;
4144 }
4145 vfile++;
4146 *targ++ = '/';
4147 }
4148 while (*vfile)
4149 *targ++ = *vfile++;
4150
4151 return vtbuf;
4152}
4153
4154static char utbuf[NAM$C_MAXRSS+1];
4155
4156/* translate a unix path to a VMS file spec */
4157char *
4158sys_translate_unix (ufile)
4159 char * ufile;
4160{
4161 int slash_seen = 0;
4162 char *p;
4163 char * targ;
4164
4165 if (!ufile)
4166 return 0;
4167
4168 targ = utbuf;
4169
4170 if (*ufile == '/')
4171 {
4172 ufile++;
4173 }
4174
4175 while (*ufile)
4176 {
4177 switch (*ufile)
4178 {
4179 case '/':
4180 if (slash_seen)
4181 if (index (&ufile[1], '/'))
4182 *targ++ = '.';
4183 else
4184 *targ++ = ']';
4185 else
4186 {
4187 *targ++ = ':';
4188 if (index (&ufile[1], '/'))
4189 *targ++ = '[';
4190 slash_seen = 1;
4191 }
4192 break;
4193
4194 case '.':
4195 if (strncmp (ufile, "./", 2) == 0)
4196 {
4197 if (!slash_seen)
4198 {
4199 *targ++ = '[';
4200 slash_seen = 1;
4201 }
4202 ufile++; /* skip the dot */
4203 if (index (&ufile[1], '/'))
4204 *targ++ = '.';
4205 else
4206 *targ++ = ']';
4207 }
4208 else if (strncmp (ufile, "../", 3) == 0)
4209 {
4210 if (!slash_seen)
4211 {
4212 *targ++ = '[';
4213 slash_seen = 1;
4214 }
4215 *targ++ = '-';
4216 ufile += 2; /* skip the dots */
4217 if (index (&ufile[1], '/'))
4218 *targ++ = '.';
4219 else
4220 *targ++ = ']';
4221 }
4222 else
4223 *targ++ = *ufile;
4224 break;
4225
4226 default:
4227 *targ++ = *ufile;
4228 break;
4229 }
4230 ufile++;
4231 }
4232 *targ = '\0';
177c0ea7 4233
86a5659e
JB		 4234 return utbuf;
4235}
4236
4237char *
4238getwd (pathname)
4239 char *pathname;
4240{
f4a7e5bd 4241 char *ptr, *val;
210b2b4f 4242 extern char *getcwd ();
86a5659e 4243
210b2b4f
JB		 4244#define MAXPATHLEN 1024
4245
9ac0d9e0 4246 ptr = xmalloc (MAXPATHLEN);
f4a7e5bd
RS		 4247 val = getcwd (ptr, MAXPATHLEN);
4248 if (val == 0)
4249 {
4250 xfree (ptr);
4251 return val;
4252 }
210b2b4f 4253 strcpy (pathname, ptr);
9ac0d9e0 4254 xfree (ptr);
177c0ea7 4255
210b2b4f 4256 return pathname;
86a5659e
JB		 4257}
4258
dfcf069d 4259int
86a5659e
JB		 4260getppid ()
4261{
4262 long item_code = JPI$_OWNER;
4263 unsigned long parent_id;
4264 int status;
4265
4266 if (((status = LIB$GETJPI (&item_code, 0, 0, &parent_id)) & 1) == 0)
4267 {
4268 errno = EVMSERR;
4269 vaxc$errno = status;
4270 return -1;
4271 }
4272 return parent_id;
4273}
4274
4275#undef getuid
4276unsigned
4277sys_getuid ()
4278{
4279 return (getgid () << 16) | getuid ();
4280}
4281
68c45bf0 4282#undef read
86a5659e
JB		 4283int
4284sys_read (fildes, buf, nbyte)
4285 int fildes;
4286 char *buf;
4287 unsigned int nbyte;
4288{
4289 return read (fildes, buf, (nbyte < MAXIOSIZE ? nbyte : MAXIOSIZE));
4290}
4291
4292#if 0
4293int
4294sys_write (fildes, buf, nbyte)
4295 int fildes;
4296 char *buf;
4297 unsigned int nbyte;
4298{
4299 register int nwrote, rtnval = 0;
4300
4301 while (nbyte > MAXIOSIZE && (nwrote = write (fildes, buf, MAXIOSIZE)) > 0) {
4302 nbyte -= nwrote;
4303 buf += nwrote;
4304 rtnval += nwrote;
4305 }
4306 if (nwrote < 0)
4307 return rtnval ? rtnval : -1;
4308 if ((nwrote = write (fildes, buf, nbyte)) < 0)
4309 return rtnval ? rtnval : -1;
4310 return (rtnval + nwrote);
4311}
4312#endif /* 0 */
4313
4314/*
4315 * VAX/VMS VAX C RTL really loses. It insists that records
4316 * end with a newline (carriage return) character, and if they
4317 * don't it adds one (nice of it isn't it!)
4318 *
4319 * Thus we do this stupidity below.
4320 */
4321
68c45bf0 4322#undef write
86a5659e
JB		 4323int
4324sys_write (fildes, buf, nbytes)
4325 int fildes;
4326 char *buf;
4327 unsigned int nbytes;
4328{
4329 register char *p;
4330 register char *e;
23b0668c
JB		 4331 int sum = 0;
4332 struct stat st;
4333
4334 fstat (fildes, &st);
86a5659e 4335 p = buf;
86a5659e
JB		 4336 while (nbytes > 0)
4337 {
23b0668c
JB		 4338 int len, retval;
4339
4340 /* Handle fixed-length files with carriage control. */
4341 if (st.st_fab_rfm == FAB$C_FIX
4342 && ((st.st_fab_rat & (FAB$M_FTN | FAB$M_CR)) != 0))
4343 {
4344 len = st.st_fab_mrs;
4345 retval = write (fildes, p, min (len, nbytes));
4346 if (retval != len)
4347 return -1;
4348 retval++; /* This skips the implied carriage control */
4349 }
4350 else
4351 {
4352 e = p + min (MAXIOSIZE, nbytes) - 1;
4353 while (*e != '\n' && e > p) e--;
4354 if (p == e) /* Ok.. so here we add a newline... sigh. */
4355 e = p + min (MAXIOSIZE, nbytes) - 1;
4356 len = e + 1 - p;
4357 retval = write (fildes, p, len);
4358 if (retval != len)
4359 return -1;
4360 }
4361 p += retval;
4362 sum += retval;
86a5659e
JB		 4363 nbytes -= retval;
4364 }
4365 return sum;
4366}
4367
4368/* Create file NEW copying its attributes from file OLD. If
4369 OLD is 0 or does not exist, create based on the value of
4370 vms_stmlf_recfm. */
4371
4372/* Protection value the file should ultimately have.
4373 Set by create_copy_attrs, and use by rename_sansversions. */
4374static unsigned short int fab_final_pro;
4375
4376int
4377creat_copy_attrs (old, new)
4378 char *old, *new;
4379{
4380 struct FAB fab = cc$rms_fab;
4381 struct XABPRO xabpro;
4382 char aclbuf[256]; /* Choice of size is arbitrary. See below. */
4383 extern int vms_stmlf_recfm;
4384
4385 if (old)
4386 {
4387 fab.fab$b_fac = FAB$M_GET;
4388 fab.fab$l_fna = old;
4389 fab.fab$b_fns = strlen (old);
4390 fab.fab$l_xab = (char *) &xabpro;
4391 xabpro = cc$rms_xabpro;
4392 xabpro.xab$l_aclbuf = aclbuf;
4393 xabpro.xab$w_aclsiz = sizeof aclbuf;
4394 /* Call $OPEN to fill in the fab & xabpro fields. */
986ffb24 4395 if (SYS$OPEN (&fab, 0, 0) & 1)
86a5659e 4396 {
986ffb24 4397 SYS$CLOSE (&fab, 0, 0);
86a5659e
JB		 4398 fab.fab$l_alq = 0; /* zero the allocation quantity */
4399 if (xabpro.xab$w_acllen > 0)
4400 {
4401 if (xabpro.xab$w_acllen > sizeof aclbuf)
4402 /* If the acl buffer was too short, redo open with longer one.
4403 Wouldn't need to do this if there were some system imposed
4404 limit on the size of an ACL, but I can't find any such. */
4405 {
4406 xabpro.xab$l_aclbuf = (char *) alloca (xabpro.xab$w_acllen);
4407 xabpro.xab$w_aclsiz = xabpro.xab$w_acllen;
986ffb24
JB		 4408 if (SYS$OPEN (&fab, 0, 0) & 1)
4409 SYS$CLOSE (&fab, 0, 0);
86a5659e
JB		 4410 else
4411 old = 0;
4412 }
4413 }
4414 else
4415 xabpro.xab$l_aclbuf = 0;
4416 }
4417 else
4418 old = 0;
4419 }
4420 fab.fab$l_fna = new;
4421 fab.fab$b_fns = strlen (new);
4422 if (!old)
4423 {
4424 fab.fab$l_xab = 0;
4425 fab.fab$b_rfm = vms_stmlf_recfm ? FAB$C_STMLF : FAB$C_VAR;
4426 fab.fab$b_rat = FAB$M_CR;
4427 }
4428
4429 /* Set the file protections such that we will be able to manipulate
4430 this file. Once we are done writing and renaming it, we will set
4431 the protections back. */
4432 if (old)
4433 fab_final_pro = xabpro.xab$w_pro;
4434 else
986ffb24 4435 SYS$SETDFPROT (0, &fab_final_pro);
86a5659e
JB		 4436 xabpro.xab$w_pro &= 0xff0f; /* set O:rewd for now. This is set back later. */
4437
4438 /* Create the new file with either default attrs or attrs copied
4439 from old file. */
4440 if (!(SYS$CREATE (&fab, 0, 0) & 1))
4441 return -1;
986ffb24 4442 SYS$CLOSE (&fab, 0, 0);
86a5659e
JB		 4443 /* As this is a "replacement" for creat, return a file descriptor
4444 opened for writing. */
4445 return open (new, O_WRONLY);
4446}
4447
4448#ifdef creat
4449#undef creat
4450#include <varargs.h>
4451#ifdef __GNUC__
4452#ifndef va_count
4453#define va_count(X) ((X) = *(((int *) &(va_alist)) - 1))
4454#endif
4455#endif
4456
dfcf069d 4457int
86a5659e
JB		 4458sys_creat (va_alist)
4459 va_dcl
4460{
eb8c3be9 4461 va_list list_incrementer;
86a5659e
JB		 4462 char *name;
4463 int mode;
4464 int rfd; /* related file descriptor */
4465 int fd; /* Our new file descriptor */
4466 int count;
4467 struct stat st_buf;
4468 char rfm[12];
4469 char rat[15];
4470 char mrs[13];
4471 char fsz[13];
4472 extern int vms_stmlf_recfm;
4473
4474 va_count (count);
eb8c3be9
JB		 4475 va_start (list_incrementer);
4476 name = va_arg (list_incrementer, char *);
4477 mode = va_arg (list_incrementer, int);
86a5659e 4478 if (count > 2)
eb8c3be9
JB		 4479 rfd = va_arg (list_incrementer, int);
4480 va_end (list_incrementer);
86a5659e
JB		 4481 if (count > 2)
4482 {
4483 /* Use information from the related file descriptor to set record
4484 format of the newly created file. */
4485 fstat (rfd, &st_buf);
4486 switch (st_buf.st_fab_rfm)
4487 {
4488 case FAB$C_FIX:
4489 strcpy (rfm, "rfm = fix");
4490 sprintf (mrs, "mrs = %d", st_buf.st_fab_mrs);
4491 strcpy (rat, "rat = ");
4492 if (st_buf.st_fab_rat & FAB$M_CR)
4493 strcat (rat, "cr");
4494 else if (st_buf.st_fab_rat & FAB$M_FTN)
4495 strcat (rat, "ftn");
4496 else if (st_buf.st_fab_rat & FAB$M_PRN)
4497 strcat (rat, "prn");
4498 if (st_buf.st_fab_rat & FAB$M_BLK)
4499 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4500 strcat (rat, ", blk");
4501 else
4502 strcat (rat, "blk");
4503 return creat (name, 0, rfm, rat, mrs);
4504
4505 case FAB$C_VFC:
4506 strcpy (rfm, "rfm = vfc");
4507 sprintf (fsz, "fsz = %d", st_buf.st_fab_fsz);
4508 strcpy (rat, "rat = ");
4509 if (st_buf.st_fab_rat & FAB$M_CR)
4510 strcat (rat, "cr");
4511 else if (st_buf.st_fab_rat & FAB$M_FTN)
4512 strcat (rat, "ftn");
4513 else if (st_buf.st_fab_rat & FAB$M_PRN)
4514 strcat (rat, "prn");
4515 if (st_buf.st_fab_rat & FAB$M_BLK)
4516 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4517 strcat (rat, ", blk");
4518 else
4519 strcat (rat, "blk");
4520 return creat (name, 0, rfm, rat, fsz);
4521
4522 case FAB$C_STM:
4523 strcpy (rfm, "rfm = stm");
4524 break;
4525
4526 case FAB$C_STMCR:
4527 strcpy (rfm, "rfm = stmcr");
4528 break;
4529
4530 case FAB$C_STMLF:
4531 strcpy (rfm, "rfm = stmlf");
4532 break;
4533
4534 case FAB$C_UDF:
4535 strcpy (rfm, "rfm = udf");
4536 break;
4537
4538 case FAB$C_VAR:
4539 strcpy (rfm, "rfm = var");
4540 break;
4541 }
4542 strcpy (rat, "rat = ");
4543 if (st_buf.st_fab_rat & FAB$M_CR)
4544 strcat (rat, "cr");
4545 else if (st_buf.st_fab_rat & FAB$M_FTN)
4546 strcat (rat, "ftn");
4547 else if (st_buf.st_fab_rat & FAB$M_PRN)
4548 strcat (rat, "prn");
4549 if (st_buf.st_fab_rat & FAB$M_BLK)
4550 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4551 strcat (rat, ", blk");
4552 else
4553 strcat (rat, "blk");
4554 }
4555 else
4556 {
4557 strcpy (rfm, vms_stmlf_recfm ? "rfm = stmlf" : "rfm=var");
4558 strcpy (rat, "rat=cr");
4559 }
4560 /* Until the VAX C RTL fixes the many bugs with modes, always use
4561 mode 0 to get the user's default protection. */
4562 fd = creat (name, 0, rfm, rat);
4563 if (fd < 0 && errno == EEXIST)
4564 {
4565 if (unlink (name) < 0)
4566 report_file_error ("delete", build_string (name));
4567 fd = creat (name, 0, rfm, rat);
4568 }
4569 return fd;
4570}
4571#endif /* creat */
4572
4573/* fwrite to stdout is S L O W. Speed it up by using fputc...*/
dfcf069d 4574int
86a5659e
JB		 4575sys_fwrite (ptr, size, num, fp)
4576 register char * ptr;
4577 FILE * fp;
4578{
4579 register int tot = num * size;
4580
4581 while (tot--)
4582 fputc (*ptr++, fp);
dfcf069d 4583 return num;
86a5659e
JB		 4584}
4585
4586/*
4587 * The VMS C library routine creat actually creates a new version of an
4588 * existing file rather than truncating the old version. There are times
4589 * when this is not the desired behavior, for instance, when writing an
4590 * auto save file (you only want one version), or when you don't have
4591 * write permission in the directory containing the file (but the file
177c0ea7 4592 * itself is writable). Hence this routine, which is equivalent to
86a5659e
JB		 4593 * "close (creat (fn, 0));" on Unix if fn already exists.
4594 */
4595int
4596vms_truncate (fn)
4597 char *fn;
4598{
4599 struct FAB xfab = cc$rms_fab;
4600 struct RAB xrab = cc$rms_rab;
4601 int status;
4602
4603 xfab.fab$l_fop = FAB$M_TEF; /* free allocated but unused blocks on close */
4604 xfab.fab$b_fac = FAB$M_TRN | FAB$M_GET; /* allow truncate and get access */
4605 xfab.fab$b_shr = FAB$M_NIL; /* allow no sharing - file must be locked */
4606 xfab.fab$l_fna = fn;
4607 xfab.fab$b_fns = strlen (fn);
4608 xfab.fab$l_dna = ";0"; /* default to latest version of the file */
4609 xfab.fab$b_dns = 2;
4610 xrab.rab$l_fab = &xfab;
4611
4612 /* This gibberish opens the file, positions to the first record, and
4613 deletes all records from there until the end of file. */
986ffb24 4614 if ((SYS$OPEN (&xfab) & 01) == 01)
86a5659e 4615 {
986ffb24
JB		 4616 if ((SYS$CONNECT (&xrab) & 01) == 01 &&
4617 (SYS$FIND (&xrab) & 01) == 01 &&
4618 (SYS$TRUNCATE (&xrab) & 01) == 01)
86a5659e
JB		 4619 status = 0;
4620 else
4621 status = -1;
4622 }
4623 else
4624 status = -1;
986ffb24 4625 SYS$CLOSE (&xfab);
86a5659e
JB		 4626 return status;
4627}
4628
4629/* Define this symbol to actually read SYSUAF.DAT. This requires either
4630 SYSPRV or a readable SYSUAF.DAT. */
4631
4632#ifdef READ_SYSUAF
4633/*
4634 * getuaf.c
4635 *
4636 * Routine to read the VMS User Authorization File and return
4637 * a specific user's record.
4638 */
4639
4640static struct UAF retuaf;
4641
4642struct UAF *
4643get_uaf_name (uname)
4644 char * uname;
4645{
4646 register status;
4647 struct FAB uaf_fab;
4648 struct RAB uaf_rab;
177c0ea7 4649
86a5659e
JB		 4650 uaf_fab = cc$rms_fab;
4651 uaf_rab = cc$rms_rab;
4652 /* initialize fab fields */
4653 uaf_fab.fab$l_fna = "SYS$SYSTEM:SYSUAF.DAT";
4654 uaf_fab.fab$b_fns = 21;
4655 uaf_fab.fab$b_fac = FAB$M_GET;
4656 uaf_fab.fab$b_org = FAB$C_IDX;
4657 uaf_fab.fab$b_shr = FAB$M_GET|FAB$M_PUT|FAB$M_UPD|FAB$M_DEL;
4658 /* initialize rab fields */
4659 uaf_rab.rab$l_fab = &uaf_fab;
4660 /* open the User Authorization File */
986ffb24 4661 status = SYS$OPEN (&uaf_fab);
86a5659e
JB		 4662 if (!(status&1))
4663 {
4664 errno = EVMSERR;
4665 vaxc$errno = status;
4666 return 0;
4667 }
986ffb24 4668 status = SYS$CONNECT (&uaf_rab);
86a5659e
JB		 4669 if (!(status&1))
4670 {
4671 errno = EVMSERR;
4672 vaxc$errno = status;
4673 return 0;
4674 }
4675 /* read the requested record - index is in uname */
4676 uaf_rab.rab$l_kbf = uname;
4677 uaf_rab.rab$b_ksz = strlen (uname);
4678 uaf_rab.rab$b_rac = RAB$C_KEY;
4679 uaf_rab.rab$l_ubf = (char *)&retuaf;
4680 uaf_rab.rab$w_usz = sizeof retuaf;
986ffb24 4681 status = SYS$GET (&uaf_rab);
86a5659e
JB		 4682 if (!(status&1))
4683 {
4684 errno = EVMSERR;
4685 vaxc$errno = status;
4686 return 0;
4687 }
4688 /* close the User Authorization File */
986ffb24 4689 status = SYS$DISCONNECT (&uaf_rab);
86a5659e
JB		 4690 if (!(status&1))
4691 {
4692 errno = EVMSERR;
4693 vaxc$errno = status;
4694 return 0;
4695 }
986ffb24 4696 status = SYS$CLOSE (&uaf_fab);
86a5659e
JB		 4697 if (!(status&1))
4698 {
4699 errno = EVMSERR;
4700 vaxc$errno = status;
4701 return 0;
4702 }
4703 return &retuaf;
4704}
4705
4706struct UAF *
4707get_uaf_uic (uic)
4708 unsigned long uic;
4709{
4710 register status;
4711 struct FAB uaf_fab;
4712 struct RAB uaf_rab;
177c0ea7 4713
86a5659e
JB		 4714 uaf_fab = cc$rms_fab;
4715 uaf_rab = cc$rms_rab;
4716 /* initialize fab fields */
4717 uaf_fab.fab$l_fna = "SYS$SYSTEM:SYSUAF.DAT";
4718 uaf_fab.fab$b_fns = 21;
4719 uaf_fab.fab$b_fac = FAB$M_GET;
4720 uaf_fab.fab$b_org = FAB$C_IDX;
4721 uaf_fab.fab$b_shr = FAB$M_GET|FAB$M_PUT|FAB$M_UPD|FAB$M_DEL;
4722 /* initialize rab fields */
4723 uaf_rab.rab$l_fab = &uaf_fab;
4724 /* open the User Authorization File */
986ffb24 4725 status = SYS$OPEN (&uaf_fab);
86a5659e
JB		 4726 if (!(status&1))
4727 {
4728 errno = EVMSERR;
4729 vaxc$errno = status;
4730 return 0;
4731 }
986ffb24 4732 status = SYS$CONNECT (&uaf_rab);
86a5659e
JB		 4733 if (!(status&1))
4734 {
4735 errno = EVMSERR;
4736 vaxc$errno = status;
4737 return 0;
4738 }
4739 /* read the requested record - index is in uic */
4740 uaf_rab.rab$b_krf = 1; /* 1st alternate key */
4741 uaf_rab.rab$l_kbf = (char *) &uic;
4742 uaf_rab.rab$b_ksz = sizeof uic;
4743 uaf_rab.rab$b_rac = RAB$C_KEY;
4744 uaf_rab.rab$l_ubf = (char *)&retuaf;
4745 uaf_rab.rab$w_usz = sizeof retuaf;
986ffb24 4746 status = SYS$GET (&uaf_rab);
86a5659e
JB		 4747 if (!(status&1))
4748 {
4749 errno = EVMSERR;
4750 vaxc$errno = status;
4751 return 0;
4752 }
4753 /* close the User Authorization File */
986ffb24 4754 status = SYS$DISCONNECT (&uaf_rab);
86a5659e
JB		 4755 if (!(status&1))
4756 {
4757 errno = EVMSERR;
4758 vaxc$errno = status;
4759 return 0;
4760 }
986ffb24 4761 status = SYS$CLOSE (&uaf_fab);
86a5659e
JB		 4762 if (!(status&1))
4763 {
4764 errno = EVMSERR;
4765 vaxc$errno = status;
4766 return 0;
4767 }
4768 return &retuaf;
4769}
4770
4771static struct passwd retpw;
4772
4773struct passwd *
4774cnv_uaf_pw (up)
4775 struct UAF * up;
4776{
4777 char * ptr;
4778
4779 /* copy these out first because if the username is 32 chars, the next
4780 section will overwrite the first byte of the UIC */
4781 retpw.pw_uid = up->uaf$w_mem;
4782 retpw.pw_gid = up->uaf$w_grp;
4783
ea5a0917 4784 /* I suppose this is not the best style, to possibly overwrite one
86a5659e
JB		 4785 byte beyond the end of the field, but what the heck... */
4786 ptr = &up->uaf$t_username[UAF$S_USERNAME];
4787 while (ptr[-1] == ' ')
4788 ptr--;
4789 *ptr = '\0';
4790 strcpy (retpw.pw_name, up->uaf$t_username);
4791
4792 /* the rest of these are counted ascii strings */
4793 strncpy (retpw.pw_gecos, &up->uaf$t_owner[1], up->uaf$t_owner[0]);
4794 retpw.pw_gecos[up->uaf$t_owner[0]] = '\0';
4795 strncpy (retpw.pw_dir, &up->uaf$t_defdev[1], up->uaf$t_defdev[0]);
4796 retpw.pw_dir[up->uaf$t_defdev[0]] = '\0';
4797 strncat (retpw.pw_dir, &up->uaf$t_defdir[1], up->uaf$t_defdir[0]);
4798 retpw.pw_dir[up->uaf$t_defdev[0] + up->uaf$t_defdir[0]] = '\0';
4799 strncpy (retpw.pw_shell, &up->uaf$t_defcli[1], up->uaf$t_defcli[0]);
4800 retpw.pw_shell[up->uaf$t_defcli[0]] = '\0';
4801
4802 return &retpw;
4803}
4804#else /* not READ_SYSUAF */
4805static struct passwd retpw;
4806#endif /* not READ_SYSUAF */
4807
4808struct passwd *
4809getpwnam (name)
4810 char * name;
4811{
4812#ifdef READ_SYSUAF
4813 struct UAF *up;
4814#else
4815 char * user;
4816 char * dir;
4817 unsigned char * full;
4818#endif /* READ_SYSUAF */
4819 char *ptr = name;
4820
4821 while (*ptr)
4822 {
4823 if ('a' <= *ptr && *ptr <= 'z')
4824 *ptr -= 040;
4825 ptr++;
4826 }
4827#ifdef READ_SYSUAF
4828 if (!(up = get_uaf_name (name)))
4829 return 0;
4830 return cnv_uaf_pw (up);
4831#else
4832 if (strcmp (name, getenv ("USER")) == 0)
4833 {
4834 retpw.pw_uid = getuid ();
4835 retpw.pw_gid = getgid ();
4836 strcpy (retpw.pw_name, name);
4837 if (full = egetenv ("FULLNAME"))
4838 strcpy (retpw.pw_gecos, full);
4839 else
4840 *retpw.pw_gecos = '\0';
4841 strcpy (retpw.pw_dir, egetenv ("HOME"));
4842 *retpw.pw_shell = '\0';
4843 return &retpw;
4844 }
4845 else
4846 return 0;
4847#endif /* not READ_SYSUAF */
4848}
4849
4850struct passwd *
4851getpwuid (uid)
4852 unsigned long uid;
4853{
4854#ifdef READ_SYSUAF
4855 struct UAF * up;
4856
4857 if (!(up = get_uaf_uic (uid)))
4858 return 0;
4859 return cnv_uaf_pw (up);
4860#else
4861 if (uid == sys_getuid ())
4862 return getpwnam (egetenv ("USER"));
4863 else
4864 return 0;
4865#endif /* not READ_SYSUAF */
4866}
4867
4868/* return total address space available to the current process. This is
4869 the sum of the current p0 size, p1 size and free page table entries
4870 available. */
dfcf069d 4871int
86a5659e
JB		 4872vlimit ()
4873{
4874 int item_code;
4875 unsigned long free_pages;
4876 unsigned long frep0va;
4877 unsigned long frep1va;
4878 register status;
4879
4880 item_code = JPI$_FREPTECNT;
4881 if (((status = LIB$GETJPI (&item_code, 0, 0, &free_pages)) & 1) == 0)
4882 {
4883 errno = EVMSERR;
4884 vaxc$errno = status;
4885 return -1;
4886 }
4887 free_pages *= 512;
4888
4889 item_code = JPI$_FREP0VA;
4890 if (((status = LIB$GETJPI (&item_code, 0, 0, &frep0va)) & 1) == 0)
4891 {
4892 errno = EVMSERR;
4893 vaxc$errno = status;
4894 return -1;
4895 }
4896 item_code = JPI$_FREP1VA;
4897 if (((status = LIB$GETJPI (&item_code, 0, 0, &frep1va)) & 1) == 0)
4898 {
4899 errno = EVMSERR;
4900 vaxc$errno = status;
4901 return -1;
4902 }
4903
4904 return free_pages + frep0va + (0x7fffffff - frep1va);
4905}
4906
dfcf069d 4907int
86a5659e
JB		 4908define_logical_name (varname, string)
4909 char *varname;
4910 char *string;
4911{
4912 struct dsc$descriptor_s strdsc =
4913 {strlen (string), DSC$K_DTYPE_T, DSC$K_CLASS_S, string};
4914 struct dsc$descriptor_s envdsc =
4915 {strlen (varname), DSC$K_DTYPE_T, DSC$K_CLASS_S, varname};
4916 struct dsc$descriptor_s lnmdsc =
4917 {7, DSC$K_DTYPE_T, DSC$K_CLASS_S, "LNM$JOB"};
4918
4919 return LIB$SET_LOGICAL (&envdsc, &strdsc, &lnmdsc, 0, 0);
4920}
4921
dfcf069d 4922int
86a5659e
JB		 4923delete_logical_name (varname)
4924 char *varname;
4925{
4926 struct dsc$descriptor_s envdsc =
4927 {strlen (varname), DSC$K_DTYPE_T, DSC$K_CLASS_S, varname};
4928 struct dsc$descriptor_s lnmdsc =
4929 {7, DSC$K_DTYPE_T, DSC$K_CLASS_S, "LNM$JOB"};
4930
4931 return LIB$DELETE_LOGICAL (&envdsc, &lnmdsc);
4932}
4933
dfcf069d 4934int
86a5659e 4935ulimit ()
dfcf069d
AS		 4936{
4937 return 0;
4938}
86a5659e 4939
dfcf069d 4940int
86a5659e 4941setpgrp ()
dfcf069d
AS		 4942{
4943 return 0;
4944}
86a5659e 4945
dfcf069d 4946int
86a5659e
JB		 4947execvp ()
4948{
4949 error ("execvp system call not implemented");
dfcf069d 4950 return -1;
86a5659e
JB		 4951}
4952
4953int
4954rename (from, to)
4955 char *from, *to;
4956{
4957 int status;
4958 struct FAB from_fab = cc$rms_fab, to_fab = cc$rms_fab;
4959 struct NAM from_nam = cc$rms_nam, to_nam = cc$rms_nam;
4960 char from_esn[NAM$C_MAXRSS];
4961 char to_esn[NAM$C_MAXRSS];
4962
4963 from_fab.fab$l_fna = from;
4964 from_fab.fab$b_fns = strlen (from);
4965 from_fab.fab$l_nam = &from_nam;
4966 from_fab.fab$l_fop = FAB$M_NAM;
4967
4968 from_nam.nam$l_esa = from_esn;
4969 from_nam.nam$b_ess = sizeof from_esn;
4970
4971 to_fab.fab$l_fna = to;
4972 to_fab.fab$b_fns = strlen (to);
4973 to_fab.fab$l_nam = &to_nam;
4974 to_fab.fab$l_fop = FAB$M_NAM;
4975
4976 to_nam.nam$l_esa = to_esn;
4977 to_nam.nam$b_ess = sizeof to_esn;
4978
4979 status = SYS$RENAME (&from_fab, 0, 0, &to_fab);
4980
4981 if (status & 1)
4982 return 0;
4983 else
4984 {
4985 if (status == RMS$_DEV)
4986 errno = EXDEV;
4987 else
4988 errno = EVMSERR;
4989 vaxc$errno = status;
4990 return -1;
4991 }
4992}
4993
4994/* This function renames a file like `rename', but it strips
4995 the version number from the "to" filename, such that the "to" file is
4996 will always be a new version. It also sets the file protection once it is
4997 finished. The protection that we will use is stored in fab_final_pro,
4998 and was set when we did a creat_copy_attrs to create the file that we
4999 are renaming.
5000
5001 We could use the chmod function, but Eunichs uses 3 bits per user category
eb8c3be9 5002 to describe the protection, and VMS uses 4 (write and delete are separate
86a5659e
JB		 5003 bits). To maintain portability, the VMS implementation of `chmod' wires
5004 the W and D bits together. */
5005
177c0ea7 5006
86a5659e
JB		 5007static struct fibdef fib; /* We need this initialized to zero */
5008char vms_file_written[NAM$C_MAXRSS];
5009
5010int
5011rename_sans_version (from,to)
5012 char *from, *to;
5013{
5014 short int chan;
5015 int stat;
5016 short int iosb[4];
5017 int status;
5018 struct FAB to_fab = cc$rms_fab;
5019 struct NAM to_nam = cc$rms_nam;
5020 struct dsc$descriptor fib_d ={sizeof (fib),0,0,(char*) &fib};
5021 struct dsc$descriptor fib_attr[2]
5022 = {{sizeof (fab_final_pro),ATR$C_FPRO,0,(char*) &fab_final_pro},{0,0,0,0}};
5023 char to_esn[NAM$C_MAXRSS];
5024
5025 $DESCRIPTOR (disk,to_esn);
5026
5027 to_fab.fab$l_fna = to;
5028 to_fab.fab$b_fns = strlen (to);
5029 to_fab.fab$l_nam = &to_nam;
5030 to_fab.fab$l_fop = FAB$M_NAM;
5031
5032 to_nam.nam$l_esa = to_esn;
5033 to_nam.nam$b_ess = sizeof to_esn;
5034
5035 status = SYS$PARSE (&to_fab, 0, 0); /* figure out the full file name */
5036
5037 if (to_nam.nam$l_fnb && NAM$M_EXP_VER)
5038 *(to_nam.nam$l_ver) = '\0';
5039
5040 stat = rename (from, to_esn);
5041 if (stat < 0)
5042 return stat;
5043
5044 strcpy (vms_file_written, to_esn);
5045
5046 to_fab.fab$l_fna = vms_file_written; /* this points to the versionless name */
5047 to_fab.fab$b_fns = strlen (vms_file_written);
5048
5049 /* Now set the file protection to the correct value */
986ffb24 5050 SYS$OPEN (&to_fab, 0, 0); /* This fills in the nam$w_fid fields */
86a5659e
JB		 5051
5052 /* Copy these fields into the fib */
5053 fib.fib$r_fid_overlay.fib$w_fid[0] = to_nam.nam$w_fid[0];
5054 fib.fib$r_fid_overlay.fib$w_fid[1] = to_nam.nam$w_fid[1];
5055 fib.fib$r_fid_overlay.fib$w_fid[2] = to_nam.nam$w_fid[2];
5056
986ffb24 5057 SYS$CLOSE (&to_fab, 0, 0);
86a5659e 5058
986ffb24 5059 stat = SYS$ASSIGN (&disk, &chan, 0, 0); /* open a channel to the disk */
86a5659e 5060 if (!stat)
986ffb24
JB		 5061 LIB$SIGNAL (stat);
5062 stat = SYS$QIOW (0, chan, IO$_MODIFY, iosb, 0, 0, &fib_d,
86a5659e
JB		 5063 0, 0, 0, &fib_attr, 0);
5064 if (!stat)
986ffb24
JB		 5065 LIB$SIGNAL (stat);
5066 stat = SYS$DASSGN (chan);
86a5659e 5067 if (!stat)
986ffb24 5068 LIB$SIGNAL (stat);
0137dbf7 5069 strcpy (vms_file_written, to_esn); /* We will write this to the terminal*/
86a5659e
JB		 5070 return 0;
5071}
5072
dfcf069d 5073int
86a5659e
JB		 5074link (file, new)
5075 char * file, * new;
5076{
5077 register status;
5078 struct FAB fab;
5079 struct NAM nam;
5080 unsigned short fid[3];
5081 char esa[NAM$C_MAXRSS];
5082
5083 fab = cc$rms_fab;
5084 fab.fab$l_fop = FAB$M_OFP;
5085 fab.fab$l_fna = file;
5086 fab.fab$b_fns = strlen (file);
5087 fab.fab$l_nam = &nam;
5088
5089 nam = cc$rms_nam;
5090 nam.nam$l_esa = esa;
5091 nam.nam$b_ess = NAM$C_MAXRSS;
5092
5093 status = SYS$PARSE (&fab);
5094 if ((status & 1) == 0)
5095 {
5096 errno = EVMSERR;
5097 vaxc$errno = status;
5098 return -1;
5099 }
5100 status = SYS$SEARCH (&fab);
5101 if ((status & 1) == 0)
5102 {
5103 errno = EVMSERR;
5104 vaxc$errno = status;
5105 return -1;
5106 }
5107
5108 fid[0] = nam.nam$w_fid[0];
5109 fid[1] = nam.nam$w_fid[1];
5110 fid[2] = nam.nam$w_fid[2];
5111
5112 fab.fab$l_fna = new;
5113 fab.fab$b_fns = strlen (new);
5114
5115 status = SYS$PARSE (&fab);
5116 if ((status & 1) == 0)
5117 {
5118 errno = EVMSERR;
5119 vaxc$errno = status;
5120 return -1;
5121 }
5122
5123 nam.nam$w_fid[0] = fid[0];
5124 nam.nam$w_fid[1] = fid[1];
5125 nam.nam$w_fid[2] = fid[2];
5126
5127 nam.nam$l_esa = nam.nam$l_name;
5128 nam.nam$b_esl = nam.nam$b_name + nam.nam$b_type + nam.nam$b_ver;
5129
5130 status = SYS$ENTER (&fab);
5131 if ((status & 1) == 0)
5132 {
5133 errno = EVMSERR;
5134 vaxc$errno = status;
5135 return -1;
5136 }
5137
5138 return 0;
5139}
5140
dfcf069d 5141void
86a5659e
JB		 5142croak (badfunc)
5143 char *badfunc;
5144{
5145 printf ("%s not yet implemented\r\n", badfunc);
5146 reset_sys_modes ();
5147 exit (1);
5148}
5149
5150long
5151random ()
5152{
5153 /* Arrange to return a range centered on zero. */
5154 return rand () - (1 << 30);
5155}
5156
dfcf069d 5157void
86a5659e
JB		 5158srandom (seed)
5159{
5160 srand (seed);
5161}
5162#endif /* VMS */
5163\f
b97ab886 5164#ifdef AIXHFT
86a5659e
JB		 5165
5166/* Called from init_sys_modes. */
dfcf069d 5167void
86a5659e
JB		 5168hft_init ()
5169{
5170 int junk;
5171
5172 /* If we're not on an HFT we shouldn't do any of this. We determine
5173 if we are on an HFT by trying to get an HFT error code. If this
177c0ea7 5174 call fails, we're not on an HFT. */
86a5659e
JB		 5175#ifdef IBMR2AIX
5176 if (ioctl (0, HFQERROR, &junk) < 0)
5177 return;
5178#else /* not IBMR2AIX */
5179 if (ioctl (0, HFQEIO, 0) < 0)
5180 return;
5181#endif /* not IBMR2AIX */
5182
5183 /* On AIX the default hft keyboard mapping uses backspace rather than delete
5184 as the rubout key's ASCII code. Here this is changed. The bug is that
5185 there's no way to determine the old mapping, so in reset_sys_modes
5186 we need to assume that the normal map had been present. Of course, this
5187 code also doesn't help if on a terminal emulator which doesn't understand
c4ea52a6 5188 HFT VTD's. */
86a5659e
JB		 5189 {
5190 struct hfbuf buf;
5191 struct hfkeymap keymap;
5192
5193 buf.hf_bufp = (char *)&keymap;
5194 buf.hf_buflen = sizeof (keymap);
5195 keymap.hf_nkeys = 2;
5196 keymap.hfkey[0].hf_kpos = 15;
5197 keymap.hfkey[0].hf_kstate = HFMAPCHAR | HFSHFNONE;
5198#ifdef IBMR2AIX
5199 keymap.hfkey[0].hf_keyidh = '<';
5200#else /* not IBMR2AIX */
5201 keymap.hfkey[0].hf_page = '<';
5202#endif /* not IBMR2AIX */
5203 keymap.hfkey[0].hf_char = 127;
5204 keymap.hfkey[1].hf_kpos = 15;
5205 keymap.hfkey[1].hf_kstate = HFMAPCHAR | HFSHFSHFT;
5206#ifdef IBMR2AIX
5207 keymap.hfkey[1].hf_keyidh = '<';
5208#else /* not IBMR2AIX */
5209 keymap.hfkey[1].hf_page = '<';
5210#endif /* not IBMR2AIX */
5211 keymap.hfkey[1].hf_char = 127;
5212 hftctl (0, HFSKBD, &buf);
5213 }
5214 /* The HFT system on AIX doesn't optimize for scrolling, so it's really ugly
5215 at times. */
5216 line_ins_del_ok = char_ins_del_ok = 0;
5217}
5218
c4ea52a6 5219/* Reset the rubout key to backspace. */
86a5659e 5220
dfcf069d 5221void
86a5659e
JB		 5222hft_reset ()
5223{
5224 struct hfbuf buf;
5225 struct hfkeymap keymap;
5226 int junk;
5227
5228#ifdef IBMR2AIX
5229 if (ioctl (0, HFQERROR, &junk) < 0)
5230 return;
5231#else /* not IBMR2AIX */
5232 if (ioctl (0, HFQEIO, 0) < 0)
5233 return;
5234#endif /* not IBMR2AIX */
5235
5236 buf.hf_bufp = (char *)&keymap;
5237 buf.hf_buflen = sizeof (keymap);
5238 keymap.hf_nkeys = 2;
5239 keymap.hfkey[0].hf_kpos = 15;
5240 keymap.hfkey[0].hf_kstate = HFMAPCHAR | HFSHFNONE;
5241#ifdef IBMR2AIX
5242 keymap.hfkey[0].hf_keyidh = '<';
5243#else /* not IBMR2AIX */
5244 keymap.hfkey[0].hf_page = '<';
5245#endif /* not IBMR2AIX */
5246 keymap.hfkey[0].hf_char = 8;
5247 keymap.hfkey[1].hf_kpos = 15;
5248 keymap.hfkey[1].hf_kstate = HFMAPCHAR | HFSHFSHFT;
5249#ifdef IBMR2AIX
5250 keymap.hfkey[1].hf_keyidh = '<';
5251#else /* not IBMR2AIX */
5252 keymap.hfkey[1].hf_page = '<';
5253#endif /* not IBMR2AIX */
5254 keymap.hfkey[1].hf_char = 8;
5255 hftctl (0, HFSKBD, &buf);
5256}
5257
b97ab886 5258#endif /* AIXHFT */
c238be24
RS		 5259
5260#ifdef USE_DL_STUBS
5261
5262/* These are included on Sunos 4.1 when we do not use shared libraries.
5263 X11 libraries may refer to these functions but (we hope) do not
5264 actually call them. */
5265
5266void *
5267dlopen ()
5268{
5269 return 0;
5270}
5271
5272void *
5273dlsym ()
5274{
5275 return 0;
5276}
5277
5278int
5279dlclose ()
5280{
5281 return -1;
5282}
5283
5284#endif /* USE_DL_STUBS */
51417996
RS		 5285\f
5286#ifndef BSTRING
5287
5288#ifndef bzero
5289
5290void
5291bzero (b, length)
5292 register char *b;
5293 register int length;
5294{
5295#ifdef VMS
5296 short zero = 0;
5297 long max_str = 65535;
5298
5299 while (length > max_str) {
5300 (void) LIB$MOVC5 (&zero, &zero, &zero, &max_str, b);
5301 length -= max_str;
5302 b += max_str;
5303 }
5304 max_str = length;
5305 (void) LIB$MOVC5 (&zero, &zero, &zero, &max_str, b);
5306#else
5307 while (length-- > 0)
5308 *b++ = 0;
5309#endif /* not VMS */
5310}
5311
5312#endif /* no bzero */
5313#endif /* BSTRING */
5314
c7f93f28 5315#if (!defined (BSTRING) && !defined (bcopy)) || defined (NEED_BCOPY)
51417996
RS		 5316#undef bcopy
5317
5318/* Saying `void' requires a declaration, above, where bcopy is used
5319 and that declaration causes pain for systems where bcopy is a macro. */
5320bcopy (b1, b2, length)
5321 register char *b1;
5322 register char *b2;
5323 register int length;
5324{
5325#ifdef VMS
5326 long max_str = 65535;
5327
5328 while (length > max_str) {
5329 (void) LIB$MOVC3 (&max_str, b1, b2);
5330 length -= max_str;
5331 b1 += max_str;
5332 b2 += max_str;
5333 }
5334 max_str = length;
5335 (void) LIB$MOVC3 (&length, b1, b2);
5336#else
5337 while (length-- > 0)
5338 *b2++ = *b1++;
5339#endif /* not VMS */
5340}
dfcf069d 5341#endif /* (!defined (BSTRING) && !defined (bcopy)) || defined (NEED_BCOPY) */
51417996 5342
c7f93f28 5343#ifndef BSTRING
51417996
RS		 5344#ifndef bcmp
5345int
5346bcmp (b1, b2, length) /* This could be a macro! */
5347 register char *b1;
5348 register char *b2;
5349 register int length;
5350{
5351#ifdef VMS
5352 struct dsc$descriptor_s src1 = {length, DSC$K_DTYPE_T, DSC$K_CLASS_S, b1};
5353 struct dsc$descriptor_s src2 = {length, DSC$K_DTYPE_T, DSC$K_CLASS_S, b2};
5354
5355 return STR$COMPARE (&src1, &src2);
5356#else
5357 while (length-- > 0)
5358 if (*b1++ != *b2++)
5359 return 1;
5360
5361 return 0;
5362#endif /* not VMS */
5363}
5364#endif /* no bcmp */
5365#endif /* not BSTRING */
68c45bf0
PE		 5366\f
5367#ifndef HAVE_STRSIGNAL
5368char *
5369strsignal (code)
5370 int code;
5371{
5372 char *signame = 0;
5373
5374 if (0 <= code && code < NSIG)
5375 {
5376#ifdef VMS
5377 signame = sys_errlist[code];
5378#else
5379 /* Cast to suppress warning if the table has const char *. */
5380 signame = (char *) sys_siglist[code];
5381#endif
5382 }
c4ea52a6 5383
68c45bf0
PE		 5384 return signame;
5385}
5386#endif /* HAVE_STRSIGNAL */
c4ea52a6 5387
ab5796a9
MB		 5388/* arch-tag: edb43589-4e09-4544-b325-978b5b121dcf
5389 (do not change this comment) */
Unnamed repository; edit this file 'description' to name the repository.