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[bpt/emacs.git] / src / sysdep.c
1 /* Interfaces to system-dependent kernel and library entries.
2 Copyright (C) 1985, 1986, 1987, 1988, 1993, 1994, 1995, 1999, 2000, 2001,
3 2002, 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
4
5 This file is part of GNU Emacs.
6
7 GNU Emacs is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
10 any later version.
11
12 GNU Emacs is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs; see the file COPYING. If not, write to
19 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
20 Boston, MA 02110-1301, USA. */
21
22 #ifdef HAVE_CONFIG_H
23 #include <config.h>
24 #endif
25
26 #include <signal.h>
27 #include <stdio.h>
28 #include <setjmp.h>
29 #ifdef HAVE_UNISTD_H
30 #include <unistd.h>
31 #endif
32 #include "lisp.h"
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
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 */
40 extern long int random P_ ((void));
41 #endif
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. */
45 extern void srandom P_ ((unsigned int));
46 #endif
47 #endif
48
49 #include "sysselect.h"
50
51 #include "blockinput.h"
52
53 #ifdef MAC_OS8
54 #include <sys/param.h>
55
56 #ifndef subprocesses
57 /* Nonzero means delete a process right away if it exits (process.c). */
58 static int delete_exited_processes;
59 #endif
60 #endif /* MAC_OS8 */
61
62 #ifdef WINDOWSNT
63 #define read sys_read
64 #define write sys_write
65 #include <windows.h>
66 #ifndef NULL
67 #define NULL 0
68 #endif
69 #endif /* not WINDOWSNT */
70
71 /* Does anyone other than VMS need this? */
72 #ifndef fwrite
73 #define sys_fwrite fwrite
74 #else
75 #undef fwrite
76 #endif
77
78 #include <sys/types.h>
79 #include <sys/stat.h>
80 #include <errno.h>
81
82 #ifdef HAVE_SETPGID
83 #if !defined (USG) || defined (BSD_PGRPS)
84 #undef setpgrp
85 #define setpgrp setpgid
86 #endif
87 #endif
88
89 /* Get SI_SRPC_DOMAIN, if it is available. */
90 #ifdef HAVE_SYS_SYSTEMINFO_H
91 #include <sys/systeminfo.h>
92 #endif
93
94 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida, MW Aug 1993 */
95 #include <dos.h>
96 #include "dosfns.h"
97 #include "msdos.h"
98 #include <sys/param.h>
99
100 #if __DJGPP__ > 1
101 extern int etext;
102 extern unsigned start __asm__ ("start");
103 #endif
104 #endif
105
106 #ifndef USE_CRT_DLL
107 #ifndef errno
108 extern int errno;
109 #endif
110 #endif
111
112 #ifdef VMS
113 #include <rms.h>
114 #include <ttdef.h>
115 #include <tt2def.h>
116 #include <iodef.h>
117 #include <ssdef.h>
118 #include <descrip.h>
119 #include <fibdef.h>
120 #include <atrdef.h>
121 #include <ctype.h>
122 #include <string.h>
123 #ifdef __GNUC__
124 #include <sys/file.h>
125 #else
126 #include <file.h>
127 #endif
128 #undef F_SETFL
129 #ifndef RAB$C_BID
130 #include <rab.h>
131 #endif
132 #define MAXIOSIZE (32 * PAGESIZE) /* Don't I/O more than 32 blocks at a time */
133 #endif /* VMS */
134
135 #ifndef VMS
136 #include <sys/file.h>
137 #endif /* not VMS */
138
139 #ifdef HAVE_FCNTL_H
140 #include <fcntl.h>
141 #endif
142
143 #ifndef MSDOS
144 #include <sys/ioctl.h>
145 #endif
146
147 #include "systty.h"
148 #include "syswait.h"
149
150 #ifdef BROKEN_TIOCGWINSZ
151 #undef TIOCGWINSZ
152 #undef TIOCSWINSZ
153 #endif
154
155 #if defined (USG) || defined (DGUX)
156 #include <sys/utsname.h>
157 #ifndef MEMORY_IN_STRING_H
158 #include <memory.h>
159 #endif
160 #if defined (TIOCGWINSZ) || defined (ISC4_0)
161 #ifdef NEED_SIOCTL
162 #include <sys/sioctl.h>
163 #endif
164 #ifdef NEED_PTEM_H
165 #include <sys/stream.h>
166 #include <sys/ptem.h>
167 #endif
168 #endif /* TIOCGWINSZ or ISC4_0 */
169 #endif /* USG or DGUX */
170
171 extern int quit_char;
172
173 #include "keyboard.h"
174 #include "frame.h"
175 #include "window.h"
176 #include "termhooks.h"
177 #include "termchar.h"
178 #include "termopts.h"
179 #include "dispextern.h"
180 #include "process.h"
181 #include "cm.h" /* for reset_sys_modes */
182
183 #ifdef WINDOWSNT
184 #include <direct.h>
185 /* In process.h which conflicts with the local copy. */
186 #define _P_WAIT 0
187 int _CRTAPI1 _spawnlp (int, const char *, const char *, ...);
188 int _CRTAPI1 _getpid (void);
189 extern char *getwd (char *);
190 #endif
191
192 #ifdef NONSYSTEM_DIR_LIBRARY
193 #include "ndir.h"
194 #endif /* NONSYSTEM_DIR_LIBRARY */
195
196 #include "syssignal.h"
197 #include "systime.h"
198 #ifdef HAVE_UTIME_H
199 #include <utime.h>
200 #endif
201
202 #ifndef HAVE_UTIMES
203 #ifndef HAVE_STRUCT_UTIMBUF
204 /* We want to use utime rather than utimes, but we couldn't find the
205 structure declaration. We'll use the traditional one. */
206 struct utimbuf {
207 long actime;
208 long modtime;
209 };
210 #endif
211 #endif
212
213 /* LPASS8 is new in 4.3, and makes cbreak mode provide all 8 bits. */
214 #ifndef LPASS8
215 #define LPASS8 0
216 #endif
217
218 #ifdef BSD4_1
219 #define LNOFLSH 0100000
220 #endif
221
222 static int baud_convert[] =
223 #ifdef BAUD_CONVERT
224 BAUD_CONVERT;
225 #else
226 {
227 0, 50, 75, 110, 135, 150, 200, 300, 600, 1200,
228 1800, 2400, 4800, 9600, 19200, 38400
229 };
230 #endif
231
232 #ifdef HAVE_SPEED_T
233 #include <termios.h>
234 #else
235 #if defined (HAVE_LIBNCURSES) && ! defined (NCURSES_OSPEED_T)
236 #else
237 #if defined (HAVE_TERMIOS_H) && defined (GNU_LINUX)
238 #include <termios.h>
239 #endif
240 #endif
241 #endif
242
243 int emacs_ospeed;
244
245 void croak P_ ((char *)) NO_RETURN;
246
247 #ifdef AIXHFT
248 void hft_init P_ ((struct tty_display_info *));
249 void hft_reset P_ ((struct tty_display_info *));
250 #endif
251
252 /* Temporary used by `sigblock' when defined in terms of signprocmask. */
253
254 SIGMASKTYPE sigprocmask_set;
255
256
257 #if !defined (HAVE_GET_CURRENT_DIR_NAME) || defined (BROKEN_GET_CURRENT_DIR_NAME)
258
259 /* Return the current working directory. Returns NULL on errors.
260 Any other returned value must be freed with free. This is used
261 only when get_current_dir_name is not defined on the system. */
262 char*
263 get_current_dir_name ()
264 {
265 char *buf;
266 char *pwd;
267 struct stat dotstat, pwdstat;
268 /* If PWD is accurate, use it instead of calling getwd. PWD is
269 sometimes a nicer name, and using it may avoid a fatal error if a
270 parent directory is searchable but not readable. */
271 if ((pwd = getenv ("PWD")) != 0
272 && (IS_DIRECTORY_SEP (*pwd) || (*pwd && IS_DEVICE_SEP (pwd[1])))
273 && stat (pwd, &pwdstat) == 0
274 && stat (".", &dotstat) == 0
275 && dotstat.st_ino == pwdstat.st_ino
276 && dotstat.st_dev == pwdstat.st_dev
277 #ifdef MAXPATHLEN
278 && strlen (pwd) < MAXPATHLEN
279 #endif
280 )
281 {
282 buf = (char *) malloc (strlen (pwd) + 1);
283 if (!buf)
284 return NULL;
285 strcpy (buf, pwd);
286 }
287 #ifdef HAVE_GETCWD
288 else
289 {
290 size_t buf_size = 1024;
291 buf = (char *) malloc (buf_size);
292 if (!buf)
293 return NULL;
294 for (;;)
295 {
296 if (getcwd (buf, buf_size) == buf)
297 break;
298 if (errno != ERANGE)
299 {
300 int tmp_errno = errno;
301 free (buf);
302 errno = tmp_errno;
303 return NULL;
304 }
305 buf_size *= 2;
306 buf = (char *) realloc (buf, buf_size);
307 if (!buf)
308 return NULL;
309 }
310 }
311 #else
312 else
313 {
314 /* We need MAXPATHLEN here. */
315 buf = (char *) malloc (MAXPATHLEN + 1);
316 if (!buf)
317 return NULL;
318 if (getwd (buf) == NULL)
319 {
320 int tmp_errno = errno;
321 free (buf);
322 errno = tmp_errno;
323 return NULL;
324 }
325 }
326 #endif
327 return buf;
328 }
329 #endif
330
331 \f
332 /* Discard pending input on all input descriptors. */
333
334 void
335 discard_tty_input ()
336 {
337 #ifndef WINDOWSNT
338 struct emacs_tty buf;
339
340 if (noninteractive)
341 return;
342
343 #ifdef VMS
344 end_kbd_input ();
345 SYS$QIOW (0, fileno (CURTTY()->input), IO$_READVBLK|IO$M_PURGE, input_iosb, 0, 0,
346 &buf.main, 0, 0, terminator_mask, 0, 0);
347 queue_kbd_input ();
348 #else /* not VMS */
349 #ifdef APOLLO
350 {
351 struct tty_display_info *tty;
352 for (tty = tty_list; tty; tty = tty->next)
353 {
354 int zero = 0;
355 if (tty->input)
356 ioctl (fileno (tty->input), TIOCFLUSH, &zero);
357 }
358 }
359 #else /* not Apollo */
360 #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */
361 while (dos_keyread () != -1)
362 ;
363 #else /* not MSDOS */
364 {
365 struct tty_display_info *tty;
366 for (tty = tty_list; tty; tty = tty->next)
367 {
368 if (tty->input) /* Is the device suspended? */
369 {
370 EMACS_GET_TTY (fileno (tty->input), &buf);
371 EMACS_SET_TTY (fileno (tty->input), &buf, 0);
372 }
373 }
374 }
375 #endif /* not MSDOS */
376 #endif /* not Apollo */
377 #endif /* not VMS */
378 #endif /* not WINDOWSNT */
379 }
380
381 \f
382 #ifdef SIGTSTP
383
384 /* Arrange for character C to be read as the next input from
385 the terminal.
386 XXX What if we have multiple ttys?
387 */
388
389 void
390 stuff_char (char c)
391 {
392 if (! FRAME_TERMCAP_P (SELECTED_FRAME ()))
393 return;
394
395 /* Should perhaps error if in batch mode */
396 #ifdef TIOCSTI
397 ioctl (fileno (CURTTY()->input), TIOCSTI, &c);
398 #else /* no TIOCSTI */
399 error ("Cannot stuff terminal input characters in this version of Unix");
400 #endif /* no TIOCSTI */
401 }
402
403 #endif /* SIGTSTP */
404 \f
405 void
406 init_baud_rate (int fd)
407 {
408 if (noninteractive)
409 emacs_ospeed = 0;
410 else
411 {
412 #ifdef INIT_BAUD_RATE
413 INIT_BAUD_RATE ();
414 #else
415 #ifdef DOS_NT
416 emacs_ospeed = 15;
417 #else /* not DOS_NT */
418 #ifdef VMS
419 struct sensemode sg;
420
421 SYS$QIOW (0, fd, IO$_SENSEMODE, &sg, 0, 0,
422 &sg.class, 12, 0, 0, 0, 0 );
423 emacs_ospeed = sg.xmit_baud;
424 #else /* not VMS */
425 #ifdef HAVE_TERMIOS
426 struct termios sg;
427
428 sg.c_cflag = B9600;
429 tcgetattr (fd, &sg);
430 emacs_ospeed = cfgetospeed (&sg);
431 #if defined (USE_GETOBAUD) && defined (getobaud)
432 /* m88k-motorola-sysv3 needs this (ghazi@noc.rutgers.edu) 9/1/94. */
433 if (emacs_ospeed == 0)
434 emacs_ospeed = getobaud (sg.c_cflag);
435 #endif
436 #else /* neither VMS nor TERMIOS */
437 #ifdef HAVE_TERMIO
438 struct termio sg;
439
440 sg.c_cflag = B9600;
441 #ifdef HAVE_TCATTR
442 tcgetattr (fd, &sg);
443 #else
444 ioctl (fd, TCGETA, &sg);
445 #endif
446 emacs_ospeed = sg.c_cflag & CBAUD;
447 #else /* neither VMS nor TERMIOS nor TERMIO */
448 struct sgttyb sg;
449
450 sg.sg_ospeed = B9600;
451 if (ioctl (fd, TIOCGETP, &sg) < 0)
452 abort ();
453 emacs_ospeed = sg.sg_ospeed;
454 #endif /* not HAVE_TERMIO */
455 #endif /* not HAVE_TERMIOS */
456 #endif /* not VMS */
457 #endif /* not DOS_NT */
458 #endif /* not INIT_BAUD_RATE */
459 }
460
461 baud_rate = (emacs_ospeed < sizeof baud_convert / sizeof baud_convert[0]
462 ? baud_convert[emacs_ospeed] : 9600);
463 if (baud_rate == 0)
464 baud_rate = 1200;
465 }
466
467 \f
468 /*ARGSUSED*/
469 void
470 set_exclusive_use (fd)
471 int fd;
472 {
473 #ifdef FIOCLEX
474 ioctl (fd, FIOCLEX, 0);
475 #endif
476 /* Ok to do nothing if this feature does not exist */
477 }
478 \f
479 #ifndef subprocesses
480
481 wait_without_blocking ()
482 {
483 #ifdef BSD_SYSTEM
484 wait3 (0, WNOHANG | WUNTRACED, 0);
485 #else
486 croak ("wait_without_blocking");
487 #endif
488 synch_process_alive = 0;
489 }
490
491 #endif /* not subprocesses */
492
493 int wait_debugging; /* Set nonzero to make following function work under dbx
494 (at least for bsd). */
495
496 SIGTYPE
497 wait_for_termination_signal ()
498 {}
499
500 /* Wait for subprocess with process id `pid' to terminate and
501 make sure it will get eliminated (not remain forever as a zombie) */
502
503 void
504 wait_for_termination (pid)
505 int pid;
506 {
507 while (1)
508 {
509 #ifdef subprocesses
510 #ifdef VMS
511 int status;
512
513 status = SYS$FORCEX (&pid, 0, 0);
514 break;
515 #else /* not VMS */
516 #if defined (BSD_SYSTEM) || (defined (HPUX) && !defined (HPUX_5))
517 /* Note that kill returns -1 even if the process is just a zombie now.
518 But inevitably a SIGCHLD interrupt should be generated
519 and child_sig will do wait3 and make the process go away. */
520 /* There is some indication that there is a bug involved with
521 termination of subprocesses, perhaps involving a kernel bug too,
522 but no idea what it is. Just as a hunch we signal SIGCHLD to see
523 if that causes the problem to go away or get worse. */
524 sigsetmask (sigmask (SIGCHLD));
525 if (0 > kill (pid, 0))
526 {
527 sigsetmask (SIGEMPTYMASK);
528 kill (getpid (), SIGCHLD);
529 break;
530 }
531 if (wait_debugging)
532 sleep (1);
533 else
534 sigpause (SIGEMPTYMASK);
535 #else /* not BSD_SYSTEM, and not HPUX version >= 6 */
536 #if defined (UNIPLUS)
537 if (0 > kill (pid, 0))
538 break;
539 wait (0);
540 #else /* neither BSD_SYSTEM nor UNIPLUS: random sysV */
541 #ifdef POSIX_SIGNALS /* would this work for GNU/Linux as well? */
542 sigblock (sigmask (SIGCHLD));
543 errno = 0;
544 if (kill (pid, 0) == -1 && errno == ESRCH)
545 {
546 sigunblock (sigmask (SIGCHLD));
547 break;
548 }
549
550 sigsuspend (&empty_mask);
551 #else /* not POSIX_SIGNALS */
552 #ifdef HAVE_SYSV_SIGPAUSE
553 sighold (SIGCHLD);
554 if (0 > kill (pid, 0))
555 {
556 sigrelse (SIGCHLD);
557 break;
558 }
559 sigpause (SIGCHLD);
560 #else /* not HAVE_SYSV_SIGPAUSE */
561 #ifdef WINDOWSNT
562 wait (0);
563 break;
564 #else /* not WINDOWSNT */
565 if (0 > kill (pid, 0))
566 break;
567 /* Using sleep instead of pause avoids timing error.
568 If the inferior dies just before the sleep,
569 we lose just one second. */
570 sleep (1);
571 #endif /* not WINDOWSNT */
572 #endif /* not HAVE_SYSV_SIGPAUSE */
573 #endif /* not POSIX_SIGNALS */
574 #endif /* not UNIPLUS */
575 #endif /* not BSD_SYSTEM, and not HPUX version >= 6 */
576 #endif /* not VMS */
577 #else /* not subprocesses */
578 #if __DJGPP__ > 1
579 break;
580 #else /* not __DJGPP__ > 1 */
581 #ifndef BSD4_1
582 if (kill (pid, 0) < 0)
583 break;
584 wait (0);
585 #else /* BSD4_1 */
586 int status;
587 status = wait (0);
588 if (status == pid || status == -1)
589 break;
590 #endif /* BSD4_1 */
591 #endif /* not __DJGPP__ > 1*/
592 #endif /* not subprocesses */
593 }
594 }
595
596 #ifdef subprocesses
597
598 /*
599 * flush any pending output
600 * (may flush input as well; it does not matter the way we use it)
601 */
602
603 void
604 flush_pending_output (channel)
605 int channel;
606 {
607 #ifdef HAVE_TERMIOS
608 /* If we try this, we get hit with SIGTTIN, because
609 the child's tty belongs to the child's pgrp. */
610 #else
611 #ifdef TCFLSH
612 ioctl (channel, TCFLSH, 1);
613 #else
614 #ifdef TIOCFLUSH
615 int zero = 0;
616 /* 3rd arg should be ignored
617 but some 4.2 kernels actually want the address of an int
618 and nonzero means something different. */
619 ioctl (channel, TIOCFLUSH, &zero);
620 #endif
621 #endif
622 #endif
623 }
624 \f
625 #ifndef VMS
626 /* Set up the terminal at the other end of a pseudo-terminal that
627 we will be controlling an inferior through.
628 It should not echo or do line-editing, since that is done
629 in Emacs. No padding needed for insertion into an Emacs buffer. */
630
631 void
632 child_setup_tty (out)
633 int out;
634 {
635 #ifndef DOS_NT
636 struct emacs_tty s;
637
638 EMACS_GET_TTY (out, &s);
639
640 #if defined (HAVE_TERMIO) || defined (HAVE_TERMIOS)
641 s.main.c_oflag |= OPOST; /* Enable output postprocessing */
642 s.main.c_oflag &= ~ONLCR; /* Disable map of NL to CR-NL on output */
643 #ifdef NLDLY
644 s.main.c_oflag &= ~(NLDLY|CRDLY|TABDLY|BSDLY|VTDLY|FFDLY);
645 /* No output delays */
646 #endif
647 s.main.c_lflag &= ~ECHO; /* Disable echo */
648 s.main.c_lflag |= ISIG; /* Enable signals */
649 #if 0 /* This causes bugs in (for instance) telnet to certain sites. */
650 s.main.c_iflag &= ~ICRNL; /* Disable map of CR to NL on input */
651 #ifdef INLCR /* Just being cautious, since I can't check how
652 widespread INLCR is--rms. */
653 s.main.c_iflag &= ~INLCR; /* Disable map of NL to CR on input */
654 #endif
655 #endif
656 #ifdef IUCLC
657 s.main.c_iflag &= ~IUCLC; /* Disable downcasing on input. */
658 #endif
659 #ifdef ISTRIP
660 s.main.c_iflag &= ~ISTRIP; /* don't strip 8th bit on input */
661 #endif
662 #ifdef OLCUC
663 s.main.c_oflag &= ~OLCUC; /* Disable upcasing on output. */
664 #endif
665 s.main.c_oflag &= ~TAB3; /* Disable tab expansion */
666 s.main.c_cflag = (s.main.c_cflag & ~CSIZE) | CS8; /* Don't strip 8th bit */
667 #if 0
668 /* Said to be unnecessary: */
669 s.main.c_cc[VMIN] = 1; /* minimum number of characters to accept */
670 s.main.c_cc[VTIME] = 0; /* wait forever for at least 1 character */
671 #endif
672
673 s.main.c_lflag |= ICANON; /* Enable erase/kill and eof processing */
674 s.main.c_cc[VEOF] = 04; /* insure that EOF is Control-D */
675 s.main.c_cc[VERASE] = CDISABLE; /* disable erase processing */
676 s.main.c_cc[VKILL] = CDISABLE; /* disable kill processing */
677
678 #ifdef HPUX
679 s.main.c_cflag = (s.main.c_cflag & ~CBAUD) | B9600; /* baud rate sanity */
680 #endif /* HPUX */
681
682 #ifdef SIGNALS_VIA_CHARACTERS
683 /* the QUIT and INTR character are used in process_send_signal
684 so set them here to something useful. */
685 if (s.main.c_cc[VQUIT] == CDISABLE)
686 s.main.c_cc[VQUIT] = '\\'&037; /* Control-\ */
687 if (s.main.c_cc[VINTR] == CDISABLE)
688 s.main.c_cc[VINTR] = 'C'&037; /* Control-C */
689 #endif /* not SIGNALS_VIA_CHARACTERS */
690
691 #ifdef AIX
692 /* AIX enhanced edit loses NULs, so disable it */
693 #ifndef IBMR2AIX
694 s.main.c_line = 0;
695 s.main.c_iflag &= ~ASCEDIT;
696 #endif
697 /* Also, PTY overloads NUL and BREAK.
698 don't ignore break, but don't signal either, so it looks like NUL. */
699 s.main.c_iflag &= ~IGNBRK;
700 s.main.c_iflag &= ~BRKINT;
701 /* rms: Formerly it set s.main.c_cc[VINTR] to 0377 here
702 unconditionally. Then a SIGNALS_VIA_CHARACTERS conditional
703 would force it to 0377. That looks like duplicated code. */
704 #ifndef SIGNALS_VIA_CHARACTERS
705 /* QUIT and INTR work better as signals, so disable character forms */
706 s.main.c_cc[VQUIT] = CDISABLE;
707 s.main.c_cc[VINTR] = CDISABLE;
708 s.main.c_lflag &= ~ISIG;
709 #endif /* no TIOCGPGRP or no TIOCGLTC or no TIOCGETC */
710 s.main.c_cc[VEOL] = CDISABLE;
711 s.main.c_cflag = (s.main.c_cflag & ~CBAUD) | B9600; /* baud rate sanity */
712 #endif /* AIX */
713
714 #else /* not HAVE_TERMIO */
715
716 s.main.sg_flags &= ~(ECHO | CRMOD | ANYP | ALLDELAY | RAW | LCASE
717 | CBREAK | TANDEM);
718 s.main.sg_flags |= LPASS8;
719 s.main.sg_erase = 0377;
720 s.main.sg_kill = 0377;
721 s.lmode = LLITOUT | s.lmode; /* Don't strip 8th bit */
722
723 #endif /* not HAVE_TERMIO */
724
725 EMACS_SET_TTY (out, &s, 0);
726
727 #ifdef BSD4_1
728 if (interrupt_input)
729 reset_sigio (0);
730 #endif /* BSD4_1 */
731 #ifdef RTU
732 {
733 int zero = 0;
734 ioctl (out, FIOASYNC, &zero);
735 }
736 #endif /* RTU */
737 #endif /* not DOS_NT */
738 }
739 #endif /* not VMS */
740
741 #endif /* subprocesses */
742 \f
743 /* Record a signal code and the handler for it. */
744 struct save_signal
745 {
746 int code;
747 SIGTYPE (*handler) P_ ((int));
748 };
749
750 static void save_signal_handlers P_ ((struct save_signal *));
751 static void restore_signal_handlers P_ ((struct save_signal *));
752
753 /* Suspend the Emacs process; give terminal to its superior. */
754
755 void
756 sys_suspend ()
757 {
758 #ifdef VMS
759 /* "Foster" parentage allows emacs to return to a subprocess that attached
760 to the current emacs as a cheaper than starting a whole new process. This
761 is set up by KEPTEDITOR.COM. */
762 unsigned long parent_id, foster_parent_id;
763 char *fpid_string;
764
765 fpid_string = getenv ("EMACS_PARENT_PID");
766 if (fpid_string != NULL)
767 {
768 sscanf (fpid_string, "%x", &foster_parent_id);
769 if (foster_parent_id != 0)
770 parent_id = foster_parent_id;
771 else
772 parent_id = getppid ();
773 }
774 else
775 parent_id = getppid ();
776
777 xfree (fpid_string); /* On VMS, this was malloc'd */
778
779 if (parent_id && parent_id != 0xffffffff)
780 {
781 SIGTYPE (*oldsig)() = (int) signal (SIGINT, SIG_IGN);
782 int status = LIB$ATTACH (&parent_id) & 1;
783 signal (SIGINT, oldsig);
784 return status;
785 }
786 else
787 {
788 struct {
789 int l;
790 char *a;
791 } d_prompt;
792 d_prompt.l = sizeof ("Emacs: "); /* Our special prompt */
793 d_prompt.a = "Emacs: "; /* Just a reminder */
794 LIB$SPAWN (0, 0, 0, 0, 0, 0, 0, 0, 0, 0, &d_prompt, 0);
795 return 1;
796 }
797 return -1;
798 #else
799 #if defined (SIGTSTP) && !defined (MSDOS)
800
801 {
802 int pgrp = EMACS_GETPGRP (0);
803 EMACS_KILLPG (pgrp, SIGTSTP);
804 }
805
806 #else /* No SIGTSTP */
807 #ifdef USG_JOBCTRL /* If you don't know what this is don't mess with it */
808 ptrace (0, 0, 0, 0); /* set for ptrace - caught by csh */
809 kill (getpid (), SIGQUIT);
810
811 #else /* No SIGTSTP or USG_JOBCTRL */
812
813 /* On a system where suspending is not implemented,
814 instead fork a subshell and let it talk directly to the terminal
815 while we wait. */
816 sys_subshell ();
817
818 #endif /* no USG_JOBCTRL */
819 #endif /* no SIGTSTP */
820 #endif /* not VMS */
821 }
822
823 /* Fork a subshell. */
824
825 #ifndef MAC_OS8
826 void
827 sys_subshell ()
828 {
829 #ifndef VMS
830 #ifdef DOS_NT /* Demacs 1.1.2 91/10/20 Manabu Higashida */
831 int st;
832 char oldwd[MAXPATHLEN+1]; /* Fixed length is safe on MSDOS. */
833 #endif
834 int pid;
835 struct save_signal saved_handlers[5];
836 Lisp_Object dir;
837 unsigned char *str = 0;
838 int len;
839
840 saved_handlers[0].code = SIGINT;
841 saved_handlers[1].code = SIGQUIT;
842 saved_handlers[2].code = SIGTERM;
843 #ifdef SIGIO
844 saved_handlers[3].code = SIGIO;
845 saved_handlers[4].code = 0;
846 #else
847 saved_handlers[3].code = 0;
848 #endif
849
850 /* Mentioning current_buffer->buffer would mean including buffer.h,
851 which somehow wedges the hp compiler. So instead... */
852
853 dir = intern ("default-directory");
854 if (NILP (Fboundp (dir)))
855 goto xyzzy;
856 dir = Fsymbol_value (dir);
857 if (!STRINGP (dir))
858 goto xyzzy;
859
860 dir = expand_and_dir_to_file (Funhandled_file_name_directory (dir), Qnil);
861 str = (unsigned char *) alloca (SCHARS (dir) + 2);
862 len = SCHARS (dir);
863 bcopy (SDATA (dir), str, len);
864 if (str[len - 1] != '/') str[len++] = '/';
865 str[len] = 0;
866 xyzzy:
867
868 #ifdef DOS_NT
869 pid = 0;
870 #if __DJGPP__ > 1
871 save_signal_handlers (saved_handlers);
872 synch_process_alive = 1;
873 #endif /* __DJGPP__ > 1 */
874 #else
875 pid = vfork ();
876 if (pid == -1)
877 error ("Can't spawn subshell");
878 #endif
879
880 if (pid == 0)
881 {
882 char *sh = 0;
883
884 #ifdef DOS_NT /* MW, Aug 1993 */
885 getwd (oldwd);
886 if (sh == 0)
887 sh = (char *) egetenv ("SUSPEND"); /* KFS, 1994-12-14 */
888 #endif
889 if (sh == 0)
890 sh = (char *) egetenv ("SHELL");
891 if (sh == 0)
892 sh = "sh";
893
894 /* Use our buffer's default directory for the subshell. */
895 if (str)
896 chdir ((char *) str);
897
898 #ifdef subprocesses
899 close_process_descs (); /* Close Emacs's pipes/ptys */
900 #endif
901
902 #ifdef SET_EMACS_PRIORITY
903 {
904 extern EMACS_INT emacs_priority;
905
906 if (emacs_priority < 0)
907 nice (-emacs_priority);
908 }
909 #endif
910
911 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */
912 {
913 char *epwd = getenv ("PWD");
914 char old_pwd[MAXPATHLEN+1+4];
915
916 /* If PWD is set, pass it with corrected value. */
917 if (epwd)
918 {
919 strcpy (old_pwd, epwd);
920 if (str[len - 1] == '/')
921 str[len - 1] = '\0';
922 setenv ("PWD", str, 1);
923 }
924 st = system (sh);
925 chdir (oldwd);
926 if (epwd)
927 putenv (old_pwd); /* restore previous value */
928 }
929 #if 0 /* This is also reported if last command executed in subshell failed, KFS */
930 if (st)
931 report_file_error ("Can't execute subshell", Fcons (build_string (sh), Qnil));
932 #endif
933 #else /* not MSDOS */
934 #ifdef WINDOWSNT
935 /* Waits for process completion */
936 pid = _spawnlp (_P_WAIT, sh, sh, NULL);
937 chdir (oldwd);
938 if (pid == -1)
939 write (1, "Can't execute subshell", 22);
940 #else /* not WINDOWSNT */
941 execlp (sh, sh, (char *) 0);
942 write (1, "Can't execute subshell", 22);
943 _exit (1);
944 #endif /* not WINDOWSNT */
945 #endif /* not MSDOS */
946 }
947
948 /* Do this now if we did not do it before. */
949 #if !defined (MSDOS) || __DJGPP__ == 1
950 save_signal_handlers (saved_handlers);
951 synch_process_alive = 1;
952 #endif
953
954 #ifndef DOS_NT
955 wait_for_termination (pid);
956 #endif
957 restore_signal_handlers (saved_handlers);
958 synch_process_alive = 0;
959 #endif /* !VMS */
960 }
961 #endif /* !MAC_OS8 */
962
963 static void
964 save_signal_handlers (saved_handlers)
965 struct save_signal *saved_handlers;
966 {
967 while (saved_handlers->code)
968 {
969 saved_handlers->handler
970 = (SIGTYPE (*) P_ ((int))) signal (saved_handlers->code, SIG_IGN);
971 saved_handlers++;
972 }
973 }
974
975 static void
976 restore_signal_handlers (saved_handlers)
977 struct save_signal *saved_handlers;
978 {
979 while (saved_handlers->code)
980 {
981 signal (saved_handlers->code, saved_handlers->handler);
982 saved_handlers++;
983 }
984 }
985 \f
986 #ifndef SIGIO
987 /* If SIGIO is broken, don't do anything. */
988 void
989 init_sigio (int fd)
990 {
991 }
992
993 void
994 reset_sigio (int fd)
995 {
996 }
997
998 void
999 request_sigio (void)
1000 {
1001 }
1002
1003 void
1004 unrequest_sigio (void)
1005 {
1006 }
1007
1008 #else
1009 #ifdef F_SETFL
1010
1011 int old_fcntl_flags[MAXDESC];
1012
1013 void
1014 init_sigio (fd)
1015 int fd;
1016 {
1017 #ifdef FASYNC
1018 old_fcntl_flags[fd] = fcntl (fd, F_GETFL, 0) & ~FASYNC;
1019 fcntl (fd, F_SETFL, old_fcntl_flags[fd] | FASYNC);
1020 #endif
1021 interrupts_deferred = 0;
1022 }
1023
1024 void
1025 reset_sigio (fd)
1026 int fd;
1027 {
1028 #ifdef FASYNC
1029 fcntl (fd, F_SETFL, old_fcntl_flags[fd]);
1030 #endif
1031 }
1032
1033 #ifdef FASYNC /* F_SETFL does not imply existence of FASYNC */
1034 /* XXX Uhm, FASYNC is not used anymore here. */
1035 /* XXX Yeah, but you need it for SIGIO, don't you? */
1036
1037 void
1038 request_sigio ()
1039 {
1040 if (noninteractive)
1041 return;
1042
1043 #ifdef SIGWINCH
1044 sigunblock (sigmask (SIGWINCH));
1045 #endif
1046 sigunblock (sigmask (SIGIO));
1047
1048 interrupts_deferred = 0;
1049 }
1050
1051 void
1052 unrequest_sigio (void)
1053 {
1054 if (noninteractive)
1055 return;
1056
1057 #if 0 /* XXX What's wrong with blocking SIGIO under X? */
1058 if (x_display_list)
1059 return;
1060 #endif
1061
1062 #ifdef SIGWINCH
1063 sigblock (sigmask (SIGWINCH));
1064 #endif
1065 sigblock (sigmask (SIGIO));
1066 interrupts_deferred = 1;
1067 }
1068
1069 #else /* no FASYNC */
1070 #ifdef STRIDE /* Stride doesn't have FASYNC - use FIOASYNC */
1071
1072 void
1073 request_sigio ()
1074 {
1075 int on = 1;
1076
1077 if (noninteractive || read_socket_hook)
1078 return;
1079
1080 /* XXX CURTTY() is bogus here. */
1081 ioctl (fileno (CURTTY ()->input), FIOASYNC, &on);
1082 interrupts_deferred = 0;
1083 }
1084
1085 void
1086 unrequest_sigio ()
1087 {
1088 int off = 0;
1089
1090 if (noninteractive || read_socket_hook)
1091 return;
1092
1093 /* XXX CURTTY() is bogus here. */
1094 ioctl (fileno (CURTTY ()->input), FIOASYNC, &off);
1095 interrupts_deferred = 1;
1096 }
1097
1098 #else /* not FASYNC, not STRIDE */
1099
1100 #ifdef _CX_UX
1101
1102 #include <termios.h>
1103
1104 void
1105 request_sigio ()
1106 {
1107 int on = 1;
1108 sigset_t st;
1109
1110 if (noninteractive || read_socket_hook)
1111 return;
1112
1113 sigemptyset (&st);
1114 sigaddset (&st, SIGIO);
1115 ioctl (0, FIOASYNC, &on); /* XXX This fails for multiple ttys. */
1116 interrupts_deferred = 0;
1117 sigprocmask (SIG_UNBLOCK, &st, (sigset_t *)0);
1118 }
1119
1120 void
1121 unrequest_sigio ()
1122 {
1123 int off = 0;
1124
1125 if (noninteractive || read_socket_hook)
1126 return;
1127
1128 ioctl (0, FIOASYNC, &off); /* XXX This fails for multiple ttys. */
1129 interrupts_deferred = 1;
1130 }
1131
1132 #else /* ! _CX_UX */
1133 #ifndef MSDOS
1134
1135 void
1136 request_sigio ()
1137 {
1138 if (noninteractive || read_socket_hook)
1139 return;
1140
1141 croak ("request_sigio");
1142 }
1143
1144 void
1145 unrequest_sigio ()
1146 {
1147 if (noninteractive || read_socket_hook)
1148 return;
1149
1150 croak ("unrequest_sigio");
1151 }
1152
1153 #endif /* MSDOS */
1154 #endif /* _CX_UX */
1155 #endif /* STRIDE */
1156 #endif /* FASYNC */
1157 #endif /* F_SETFL */
1158 #endif /* SIGIO */
1159 \f
1160 /* Saving and restoring the process group of Emacs's terminal. */
1161
1162 #ifdef BSD_PGRPS
1163
1164 /* The process group of which Emacs was a member when it initially
1165 started.
1166
1167 If Emacs was in its own process group (i.e. inherited_pgroup ==
1168 getpid ()), then we know we're running under a shell with job
1169 control (Emacs would never be run as part of a pipeline).
1170 Everything is fine.
1171
1172 If Emacs was not in its own process group, then we know we're
1173 running under a shell (or a caller) that doesn't know how to
1174 separate itself from Emacs (like sh). Emacs must be in its own
1175 process group in order to receive SIGIO correctly. In this
1176 situation, we put ourselves in our own pgroup, forcibly set the
1177 tty's pgroup to our pgroup, and make sure to restore and reinstate
1178 the tty's pgroup just like any other terminal setting. If
1179 inherited_group was not the tty's pgroup, then we'll get a
1180 SIGTTmumble when we try to change the tty's pgroup, and a CONT if
1181 it goes foreground in the future, which is what should happen.
1182
1183 This variable is initialized in emacs.c. */
1184 int inherited_pgroup;
1185
1186 /* Split off the foreground process group to Emacs alone. When we are
1187 in the foreground, but not started in our own process group,
1188 redirect the tty device handle FD to point to our own process
1189 group. We need to be in our own process group to receive SIGIO
1190 properly. */
1191 void
1192 narrow_foreground_group (int fd)
1193 {
1194 int me = getpid ();
1195
1196 setpgrp (0, inherited_pgroup);
1197 #if 0
1198 /* XXX inherited_pgroup should not be zero here, but GTK seems to
1199 mess this up. */
1200 if (! inherited_pgroup)
1201 abort (); /* Should not happen. */
1202 #endif
1203 if (inherited_pgroup != me)
1204 EMACS_SET_TTY_PGRP (fd, &me); /* XXX This only works on the controlling tty. */
1205 setpgrp (0, me);
1206 }
1207
1208 /* Set the tty to our original foreground group. */
1209 void
1210 widen_foreground_group (int fd)
1211 {
1212 if (inherited_pgroup != getpid ())
1213 EMACS_SET_TTY_PGRP (fd, &inherited_pgroup);
1214 setpgrp (0, inherited_pgroup);
1215 }
1216
1217 #endif /* BSD_PGRPS */
1218 \f
1219 /* Getting and setting emacs_tty structures. */
1220
1221 /* Set *TC to the parameters associated with the terminal FD.
1222 Return zero if all's well, or -1 if we ran into an error we
1223 couldn't deal with. */
1224 int
1225 emacs_get_tty (fd, settings)
1226 int fd;
1227 struct emacs_tty *settings;
1228 {
1229 /* Retrieve the primary parameters - baud rate, character size, etcetera. */
1230 #ifdef HAVE_TCATTR
1231 /* We have those nifty POSIX tcmumbleattr functions. */
1232 bzero (&settings->main, sizeof (settings->main));
1233 if (tcgetattr (fd, &settings->main) < 0)
1234 return -1;
1235
1236 #else
1237 #ifdef HAVE_TERMIO
1238 /* The SYSV-style interface? */
1239 if (ioctl (fd, TCGETA, &settings->main) < 0)
1240 return -1;
1241
1242 #else
1243 #ifdef VMS
1244 /* Vehemently Monstrous System? :-) */
1245 if (! (SYS$QIOW (0, fd, IO$_SENSEMODE, settings, 0, 0,
1246 &settings->main.class, 12, 0, 0, 0, 0)
1247 & 1))
1248 return -1;
1249
1250 #else
1251 #ifndef DOS_NT
1252 /* I give up - I hope you have the BSD ioctls. */
1253 if (ioctl (fd, TIOCGETP, &settings->main) < 0)
1254 return -1;
1255 #endif /* not DOS_NT */
1256 #endif
1257 #endif
1258 #endif
1259
1260 /* Suivant - Do we have to get struct ltchars data? */
1261 #ifdef HAVE_LTCHARS
1262 if (ioctl (fd, TIOCGLTC, &settings->ltchars) < 0)
1263 return -1;
1264 #endif
1265
1266 /* How about a struct tchars and a wordful of lmode bits? */
1267 #ifdef HAVE_TCHARS
1268 if (ioctl (fd, TIOCGETC, &settings->tchars) < 0
1269 || ioctl (fd, TIOCLGET, &settings->lmode) < 0)
1270 return -1;
1271 #endif
1272
1273 /* We have survived the tempest. */
1274 return 0;
1275 }
1276
1277
1278 /* Set the parameters of the tty on FD according to the contents of
1279 *SETTINGS. If FLUSHP is non-zero, we discard input.
1280 Return 0 if all went well, and -1 if anything failed. */
1281
1282 int
1283 emacs_set_tty (fd, settings, flushp)
1284 int fd;
1285 struct emacs_tty *settings;
1286 int flushp;
1287 {
1288 /* Set the primary parameters - baud rate, character size, etcetera. */
1289 #ifdef HAVE_TCATTR
1290 int i;
1291 /* We have those nifty POSIX tcmumbleattr functions.
1292 William J. Smith <wjs@wiis.wang.com> writes:
1293 "POSIX 1003.1 defines tcsetattr to return success if it was
1294 able to perform any of the requested actions, even if some
1295 of the requested actions could not be performed.
1296 We must read settings back to ensure tty setup properly.
1297 AIX requires this to keep tty from hanging occasionally." */
1298 /* This make sure that we don't loop indefinitely in here. */
1299 for (i = 0 ; i < 10 ; i++)
1300 if (tcsetattr (fd, flushp ? TCSAFLUSH : TCSADRAIN, &settings->main) < 0)
1301 {
1302 if (errno == EINTR)
1303 continue;
1304 else
1305 return -1;
1306 }
1307 else
1308 {
1309 struct termios new;
1310
1311 bzero (&new, sizeof (new));
1312 /* Get the current settings, and see if they're what we asked for. */
1313 tcgetattr (fd, &new);
1314 /* We cannot use memcmp on the whole structure here because under
1315 * aix386 the termios structure has some reserved field that may
1316 * not be filled in.
1317 */
1318 if ( new.c_iflag == settings->main.c_iflag
1319 && new.c_oflag == settings->main.c_oflag
1320 && new.c_cflag == settings->main.c_cflag
1321 && new.c_lflag == settings->main.c_lflag
1322 && memcmp (new.c_cc, settings->main.c_cc, NCCS) == 0)
1323 break;
1324 else
1325 continue;
1326 }
1327
1328 #else
1329 #ifdef HAVE_TERMIO
1330 /* The SYSV-style interface? */
1331 if (ioctl (fd, flushp ? TCSETAF : TCSETAW, &settings->main) < 0)
1332 return -1;
1333
1334 #else
1335 #ifdef VMS
1336 /* Vehemently Monstrous System? :-) */
1337 if (! (SYS$QIOW (0, fd, IO$_SETMODE, &input_iosb, 0, 0,
1338 &settings->main.class, 12, 0, 0, 0, 0)
1339 & 1))
1340 return -1;
1341
1342 #else
1343 #ifndef DOS_NT
1344 /* I give up - I hope you have the BSD ioctls. */
1345 if (ioctl (fd, (flushp) ? TIOCSETP : TIOCSETN, &settings->main) < 0)
1346 return -1;
1347 #endif /* not DOS_NT */
1348
1349 #endif
1350 #endif
1351 #endif
1352
1353 /* Suivant - Do we have to get struct ltchars data? */
1354 #ifdef HAVE_LTCHARS
1355 if (ioctl (fd, TIOCSLTC, &settings->ltchars) < 0)
1356 return -1;
1357 #endif
1358
1359 /* How about a struct tchars and a wordful of lmode bits? */
1360 #ifdef HAVE_TCHARS
1361 if (ioctl (fd, TIOCSETC, &settings->tchars) < 0
1362 || ioctl (fd, TIOCLSET, &settings->lmode) < 0)
1363 return -1;
1364 #endif
1365
1366 /* We have survived the tempest. */
1367 return 0;
1368 }
1369
1370 \f
1371
1372 #ifdef BSD4_1
1373 /* BSD 4.1 needs to keep track of the lmode bits in order to start
1374 sigio. */
1375 int lmode;
1376 #endif
1377
1378 #ifndef F_SETOWN_BUG
1379 #ifdef F_SETOWN
1380 int old_fcntl_owner[MAXDESC];
1381 #endif /* F_SETOWN */
1382 #endif /* F_SETOWN_BUG */
1383
1384 /* This may also be defined in stdio,
1385 but if so, this does no harm,
1386 and using the same name avoids wasting the other one's space. */
1387
1388 #ifdef nec_ews_svr4
1389 extern char *_sobuf ;
1390 #else
1391 #if defined (USG) || defined (DGUX)
1392 unsigned char _sobuf[BUFSIZ+8];
1393 #else
1394 char _sobuf[BUFSIZ];
1395 #endif
1396 #endif
1397
1398 #ifdef HAVE_LTCHARS
1399 static struct ltchars new_ltchars = {-1,-1,-1,-1,-1,-1};
1400 #endif
1401 #ifdef HAVE_TCHARS
1402 static struct tchars new_tchars = {-1,-1,-1,-1,-1,-1};
1403 #endif
1404
1405 /* Initialize the terminal mode on all tty devices that are currently
1406 open. */
1407
1408 void
1409 init_all_sys_modes (void)
1410 {
1411 struct tty_display_info *tty;
1412 for (tty = tty_list; tty; tty = tty->next)
1413 init_sys_modes (tty);
1414 }
1415
1416 /* Initialize the terminal mode on the given tty device. */
1417
1418 void
1419 init_sys_modes (tty_out)
1420 struct tty_display_info *tty_out;
1421 {
1422 struct emacs_tty tty;
1423
1424 #ifdef VMS
1425 #if 0
1426 static int oob_chars[2] = {0, 1 << 7}; /* catch C-g's */
1427 extern int (*interrupt_signal) ();
1428 #endif
1429 #endif
1430
1431 Vtty_erase_char = Qnil;
1432
1433 if (noninteractive)
1434 return;
1435
1436 if (!tty_out->output)
1437 return; /* The tty is suspended. */
1438
1439 #ifdef VMS
1440 if (!input_ef)
1441 input_ef = get_kbd_event_flag ();
1442 /* LIB$GET_EF (&input_ef); */
1443 SYS$CLREF (input_ef);
1444 waiting_for_ast = 0;
1445 if (!timer_ef)
1446 timer_ef = get_timer_event_flag ();
1447 /* LIB$GET_EF (&timer_ef); */
1448 SYS$CLREF (timer_ef);
1449 #if 0
1450 if (!process_ef)
1451 {
1452 LIB$GET_EF (&process_ef);
1453 SYS$CLREF (process_ef);
1454 }
1455 if (input_ef / 32 != process_ef / 32)
1456 croak ("Input and process event flags in different clusters.");
1457 #endif
1458 if (input_ef / 32 != timer_ef / 32)
1459 croak ("Input and timer event flags in different clusters.");
1460 #if 0
1461 input_eflist = ((unsigned) 1 << (input_ef % 32)) |
1462 ((unsigned) 1 << (process_ef % 32));
1463 #endif
1464 timer_eflist = ((unsigned) 1 << (input_ef % 32)) |
1465 ((unsigned) 1 << (timer_ef % 32));
1466 #ifndef VMS4_4
1467 sys_access_reinit ();
1468 #endif
1469 #endif /* VMS */
1470
1471 #ifdef BSD_PGRPS
1472 #if 0
1473 /* read_socket_hook is not global anymore. I think doing this
1474 unconditionally will not cause any problems. */
1475 if (! read_socket_hook && EQ (Vinitial_window_system, Qnil))
1476 #endif
1477 narrow_foreground_group (fileno (tty_out->input));
1478 #endif
1479
1480 if (! tty_out->old_tty)
1481 tty_out->old_tty = (struct emacs_tty *) xmalloc (sizeof (struct emacs_tty));
1482
1483 EMACS_GET_TTY (fileno (tty_out->input), tty_out->old_tty);
1484
1485 tty = *tty_out->old_tty;
1486
1487 #if defined (HAVE_TERMIO) || defined (HAVE_TERMIOS)
1488 XSETINT (Vtty_erase_char, tty.main.c_cc[VERASE]);
1489
1490 #ifdef DGUX
1491 /* This allows meta to be sent on 8th bit. */
1492 tty.main.c_iflag &= ~INPCK; /* don't check input for parity */
1493 #endif
1494 tty.main.c_iflag |= (IGNBRK); /* Ignore break condition */
1495 tty.main.c_iflag &= ~ICRNL; /* Disable map of CR to NL on input */
1496 #ifdef INLCR /* I'm just being cautious,
1497 since I can't check how widespread INLCR is--rms. */
1498 tty.main.c_iflag &= ~INLCR; /* Disable map of NL to CR on input */
1499 #endif
1500 #ifdef ISTRIP
1501 tty.main.c_iflag &= ~ISTRIP; /* don't strip 8th bit on input */
1502 #endif
1503 tty.main.c_lflag &= ~ECHO; /* Disable echo */
1504 tty.main.c_lflag &= ~ICANON; /* Disable erase/kill processing */
1505 #ifdef IEXTEN
1506 tty.main.c_lflag &= ~IEXTEN; /* Disable other editing characters. */
1507 #endif
1508 tty.main.c_lflag |= ISIG; /* Enable signals */
1509 if (tty_out->flow_control)
1510 {
1511 tty.main.c_iflag |= IXON; /* Enable start/stop output control */
1512 #ifdef IXANY
1513 tty.main.c_iflag &= ~IXANY;
1514 #endif /* IXANY */
1515 }
1516 else
1517 tty.main.c_iflag &= ~IXON; /* Disable start/stop output control */
1518 tty.main.c_oflag &= ~ONLCR; /* Disable map of NL to CR-NL
1519 on output */
1520 tty.main.c_oflag &= ~TAB3; /* Disable tab expansion */
1521 #ifdef CS8
1522 if (tty_out->meta_key)
1523 {
1524 tty.main.c_cflag |= CS8; /* allow 8th bit on input */
1525 tty.main.c_cflag &= ~PARENB;/* Don't check parity */
1526 }
1527 #endif
1528 if (tty_out->input == stdin)
1529 {
1530 tty.main.c_cc[VINTR] = quit_char; /* C-g (usually) gives SIGINT */
1531 /* Set up C-g for both SIGQUIT and SIGINT.
1532 We don't know which we will get, but we handle both alike
1533 so which one it really gives us does not matter. */
1534 tty.main.c_cc[VQUIT] = quit_char;
1535 }
1536 else
1537 {
1538 /* We normally don't get interrupt or quit signals from tty
1539 devices other than our controlling terminal; therefore,
1540 we must handle C-g as normal input. Unfortunately, this
1541 means that the interrupt and quit feature must be
1542 disabled on secondary ttys, or we would not even see the
1543 keypress.
1544
1545 Note that even though emacsclient could have special code
1546 to pass SIGINT to Emacs, we should _not_ enable
1547 interrupt/quit keys for emacsclient frames. This means
1548 that we can't break out of loops in C code from a
1549 secondary tty frame, but we can always decide what
1550 display the C-g came from, which is more important from a
1551 usability point of view. (Consider the case when two
1552 people work together using the same Emacs instance.) */
1553 tty.main.c_cc[VINTR] = CDISABLE;
1554 tty.main.c_cc[VQUIT] = CDISABLE;
1555 }
1556 tty.main.c_cc[VMIN] = 1; /* Input should wait for at least 1 char */
1557 tty.main.c_cc[VTIME] = 0; /* no matter how long that takes. */
1558 #ifdef VSWTCH
1559 tty.main.c_cc[VSWTCH] = CDISABLE; /* Turn off shell layering use
1560 of C-z */
1561 #endif /* VSWTCH */
1562
1563 #if defined (mips) || defined (HAVE_TCATTR)
1564 #ifdef VSUSP
1565 tty.main.c_cc[VSUSP] = CDISABLE; /* Turn off mips handling of C-z. */
1566 #endif /* VSUSP */
1567 #ifdef V_DSUSP
1568 tty.main.c_cc[V_DSUSP] = CDISABLE; /* Turn off mips handling of C-y. */
1569 #endif /* V_DSUSP */
1570 #ifdef VDSUSP /* Some systems have VDSUSP, some have V_DSUSP. */
1571 tty.main.c_cc[VDSUSP] = CDISABLE;
1572 #endif /* VDSUSP */
1573 #ifdef VLNEXT
1574 tty.main.c_cc[VLNEXT] = CDISABLE;
1575 #endif /* VLNEXT */
1576 #ifdef VREPRINT
1577 tty.main.c_cc[VREPRINT] = CDISABLE;
1578 #endif /* VREPRINT */
1579 #ifdef VWERASE
1580 tty.main.c_cc[VWERASE] = CDISABLE;
1581 #endif /* VWERASE */
1582 #ifdef VDISCARD
1583 tty.main.c_cc[VDISCARD] = CDISABLE;
1584 #endif /* VDISCARD */
1585
1586 if (tty_out->flow_control)
1587 {
1588 #ifdef VSTART
1589 tty.main.c_cc[VSTART] = '\021';
1590 #endif /* VSTART */
1591 #ifdef VSTOP
1592 tty.main.c_cc[VSTOP] = '\023';
1593 #endif /* VSTOP */
1594 }
1595 else
1596 {
1597 #ifdef VSTART
1598 tty.main.c_cc[VSTART] = CDISABLE;
1599 #endif /* VSTART */
1600 #ifdef VSTOP
1601 tty.main.c_cc[VSTOP] = CDISABLE;
1602 #endif /* VSTOP */
1603 }
1604 #endif /* mips or HAVE_TCATTR */
1605
1606 #ifdef SET_LINE_DISCIPLINE
1607 /* Need to explicitly request TERMIODISC line discipline or
1608 Ultrix's termios does not work correctly. */
1609 tty.main.c_line = SET_LINE_DISCIPLINE;
1610 #endif
1611 #ifdef AIX
1612 #ifndef IBMR2AIX
1613 /* AIX enhanced edit loses NULs, so disable it. */
1614 tty.main.c_line = 0;
1615 tty.main.c_iflag &= ~ASCEDIT;
1616 #else
1617 tty.main.c_cc[VSTRT] = CDISABLE;
1618 tty.main.c_cc[VSTOP] = CDISABLE;
1619 tty.main.c_cc[VSUSP] = CDISABLE;
1620 tty.main.c_cc[VDSUSP] = CDISABLE;
1621 #endif /* IBMR2AIX */
1622 if (tty_out->flow_control)
1623 {
1624 #ifdef VSTART
1625 tty.main.c_cc[VSTART] = '\021';
1626 #endif /* VSTART */
1627 #ifdef VSTOP
1628 tty.main.c_cc[VSTOP] = '\023';
1629 #endif /* VSTOP */
1630 }
1631 /* Also, PTY overloads NUL and BREAK.
1632 don't ignore break, but don't signal either, so it looks like NUL.
1633 This really serves a purpose only if running in an XTERM window
1634 or via TELNET or the like, but does no harm elsewhere. */
1635 tty.main.c_iflag &= ~IGNBRK;
1636 tty.main.c_iflag &= ~BRKINT;
1637 #endif
1638 #else /* if not HAVE_TERMIO */
1639 #ifdef VMS
1640 tty.main.tt_char |= TT$M_NOECHO;
1641 if (meta_key)
1642 tty.main.tt_char |= TT$M_EIGHTBIT;
1643 if (tty_out->flow_control)
1644 tty.main.tt_char |= TT$M_TTSYNC;
1645 else
1646 tty.main.tt_char &= ~TT$M_TTSYNC;
1647 tty.main.tt2_char |= TT2$M_PASTHRU | TT2$M_XON;
1648 #else /* not VMS (BSD, that is) */
1649 #ifndef DOS_NT
1650 XSETINT (Vtty_erase_char, tty.main.sg_erase);
1651 tty.main.sg_flags &= ~(ECHO | CRMOD | XTABS);
1652 if (meta_key)
1653 tty.main.sg_flags |= ANYP;
1654 tty.main.sg_flags |= interrupt_input ? RAW : CBREAK;
1655 #endif /* not DOS_NT */
1656 #endif /* not VMS (BSD, that is) */
1657 #endif /* not HAVE_TERMIO */
1658
1659 /* If going to use CBREAK mode, we must request C-g to interrupt
1660 and turn off start and stop chars, etc. If not going to use
1661 CBREAK mode, do this anyway so as to turn off local flow
1662 control for user coming over network on 4.2; in this case,
1663 only t_stopc and t_startc really matter. */
1664 #ifndef HAVE_TERMIO
1665 #ifdef HAVE_TCHARS
1666 /* Note: if not using CBREAK mode, it makes no difference how we
1667 set this */
1668 tty.tchars = new_tchars;
1669 tty.tchars.t_intrc = quit_char;
1670 if (tty_out->flow_control)
1671 {
1672 tty.tchars.t_startc = '\021';
1673 tty.tchars.t_stopc = '\023';
1674 }
1675
1676 tty.lmode = LDECCTQ | LLITOUT | LPASS8 | LNOFLSH | tty_out->old_tty.lmode;
1677 #ifdef ultrix
1678 /* Under Ultrix 4.2a, leaving this out doesn't seem to hurt
1679 anything, and leaving it in breaks the meta key. Go figure. */
1680 tty.lmode &= ~LLITOUT;
1681 #endif
1682
1683 #ifdef BSD4_1
1684 lmode = tty.lmode;
1685 #endif
1686
1687 #endif /* HAVE_TCHARS */
1688 #endif /* not HAVE_TERMIO */
1689
1690 #ifdef HAVE_LTCHARS
1691 tty.ltchars = new_ltchars;
1692 #endif /* HAVE_LTCHARS */
1693 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida, MW Aug 1993 */
1694 if (!tty_out->term_initted)
1695 internal_terminal_init ();
1696 dos_ttraw ();
1697 #endif
1698
1699 EMACS_SET_TTY (fileno (tty_out->input), &tty, 0);
1700
1701 /* This code added to insure that, if flow-control is not to be used,
1702 we have an unlocked terminal at the start. */
1703
1704 #ifdef TCXONC
1705 if (!tty_out->flow_control) ioctl (fileno (tty_out->input), TCXONC, 1);
1706 #endif
1707 #ifndef APOLLO
1708 #ifdef TIOCSTART
1709 if (!tty_out->flow_control) ioctl (fileno (tty_out->input), TIOCSTART, 0);
1710 #endif
1711 #endif
1712
1713 #if defined (HAVE_TERMIOS) || defined (HPUX9)
1714 #ifdef TCOON
1715 if (!tty_out->flow_control) tcflow (fileno (tty_out->input), TCOON);
1716 #endif
1717 #endif
1718
1719 #ifdef AIXHFT
1720 hft_init (tty_out);
1721 #ifdef IBMR2AIX
1722 {
1723 /* IBM's HFT device usually thinks a ^J should be LF/CR. We need it
1724 to be only LF. This is the way that is done. */
1725 struct termio tty;
1726
1727 if (ioctl (1, HFTGETID, &tty) != -1)
1728 write (1, "\033[20l", 5);
1729 }
1730 #endif
1731 #endif /* AIXHFT */
1732
1733 #ifdef VMS
1734 /* Appears to do nothing when in PASTHRU mode.
1735 SYS$QIOW (0, fileno (tty_out->input), IO$_SETMODE|IO$M_OUTBAND, 0, 0, 0,
1736 interrupt_signal, oob_chars, 0, 0, 0, 0);
1737 */
1738 queue_kbd_input (0);
1739 #endif /* VMS */
1740
1741 #ifdef F_SETFL
1742 #ifndef F_SETOWN_BUG
1743 #ifdef F_GETOWN /* F_SETFL does not imply existence of F_GETOWN */
1744 if (interrupt_input)
1745 {
1746 old_fcntl_owner[fileno (tty_out->input)] =
1747 fcntl (fileno (tty_out->input), F_GETOWN, 0);
1748 fcntl (fileno (tty_out->input), F_SETOWN, getpid ());
1749 init_sigio (fileno (tty_out->input));
1750 #ifdef HAVE_GPM
1751 if (term_gpm)
1752 {
1753 fcntl (gpm_fd, F_SETOWN, getpid ());
1754 fcntl (gpm_fd, F_SETFL, fcntl (gpm_fd, F_GETFL, 0) | O_NONBLOCK);
1755 init_sigio (gpm_fd);
1756 }
1757 #endif /* HAVE_GPM */
1758 }
1759 #endif /* F_GETOWN */
1760 #endif /* F_SETOWN_BUG */
1761 #endif /* F_SETFL */
1762
1763 #ifdef BSD4_1
1764 if (interrupt_input)
1765 init_sigio (fileno (tty_out->input));
1766 #endif
1767
1768 #ifdef VMS /* VMS sometimes has this symbol but lacks setvbuf. */
1769 #undef _IOFBF
1770 #endif
1771 #ifdef _IOFBF
1772 /* This symbol is defined on recent USG systems.
1773 Someone says without this call USG won't really buffer the file
1774 even with a call to setbuf. */
1775 setvbuf (tty_out->output, (char *) _sobuf, _IOFBF, sizeof _sobuf);
1776 #else
1777 setbuf (tty_out->output, (char *) _sobuf);
1778 #endif
1779
1780 tty_set_terminal_modes (tty_out->terminal);
1781
1782 if (!tty_out->term_initted)
1783 {
1784 Lisp_Object tail, frame;
1785 FOR_EACH_FRAME (tail, frame)
1786 {
1787 /* XXX This needs to be revised. */
1788 if (FRAME_TERMCAP_P (XFRAME (frame))
1789 && FRAME_TTY (XFRAME (frame)) == tty_out)
1790 init_frame_faces (XFRAME (frame));
1791 }
1792 }
1793
1794 if (tty_out->term_initted && no_redraw_on_reenter)
1795 {
1796 /* XXX This seems wrong on multi-tty. */
1797 if (display_completed)
1798 direct_output_forward_char (0);
1799 }
1800 else
1801 {
1802 Lisp_Object tail, frame;
1803 frame_garbaged = 1;
1804 FOR_EACH_FRAME (tail, frame)
1805 {
1806 if (FRAME_TERMCAP_P (XFRAME (frame))
1807 && FRAME_TTY (XFRAME (frame)) == tty_out)
1808 FRAME_GARBAGED_P (XFRAME (frame)) = 1;
1809 }
1810 }
1811
1812 tty_out->term_initted = 1;
1813 }
1814
1815 /* Return nonzero if safe to use tabs in output.
1816 At the time this is called, init_sys_modes has not been done yet. */
1817
1818 int
1819 tabs_safe_p (int fd)
1820 {
1821 struct emacs_tty etty;
1822
1823 EMACS_GET_TTY (fd, &etty);
1824 return EMACS_TTY_TABS_OK (&etty);
1825 }
1826 \f
1827 /* Get terminal size from system.
1828 Store number of lines into *HEIGHTP and width into *WIDTHP.
1829 We store 0 if there's no valid information. */
1830
1831 void
1832 get_tty_size (int fd, int *widthp, int *heightp)
1833 {
1834
1835 #ifdef TIOCGWINSZ
1836
1837 /* BSD-style. */
1838 struct winsize size;
1839
1840 if (ioctl (fd, TIOCGWINSZ, &size) == -1)
1841 *widthp = *heightp = 0;
1842 else
1843 {
1844 *widthp = size.ws_col;
1845 *heightp = size.ws_row;
1846 }
1847
1848 #else
1849 #ifdef TIOCGSIZE
1850
1851 /* SunOS - style. */
1852 struct ttysize size;
1853
1854 if (ioctl (fd, TIOCGSIZE, &size) == -1)
1855 *widthp = *heightp = 0;
1856 else
1857 {
1858 *widthp = size.ts_cols;
1859 *heightp = size.ts_lines;
1860 }
1861
1862 #else
1863 #ifdef VMS
1864
1865 /* Use a fresh channel since the current one may have stale info
1866 (for example, from prior to a suspend); and to avoid a dependency
1867 in the init sequence. */
1868 int chan;
1869 struct sensemode tty;
1870
1871 SYS$ASSIGN (&input_dsc, &chan, 0, 0);
1872 SYS$QIOW (0, chan, IO$_SENSEMODE, &tty, 0, 0,
1873 &tty.class, 12, 0, 0, 0, 0);
1874 SYS$DASSGN (chan);
1875 *widthp = tty.scr_wid;
1876 *heightp = tty.scr_len;
1877
1878 #else
1879 #ifdef MSDOS
1880 *widthp = ScreenCols ();
1881 *heightp = ScreenRows ();
1882 #else /* system doesn't know size */
1883 *widthp = 0;
1884 *heightp = 0;
1885 #endif
1886 #endif /* not VMS */
1887 #endif /* not SunOS-style */
1888 #endif /* not BSD-style */
1889 }
1890
1891 /* Set the logical window size associated with descriptor FD
1892 to HEIGHT and WIDTH. This is used mainly with ptys. */
1893
1894 int
1895 set_window_size (fd, height, width)
1896 int fd, height, width;
1897 {
1898 #ifdef TIOCSWINSZ
1899
1900 /* BSD-style. */
1901 struct winsize size;
1902 size.ws_row = height;
1903 size.ws_col = width;
1904
1905 if (ioctl (fd, TIOCSWINSZ, &size) == -1)
1906 return 0; /* error */
1907 else
1908 return 1;
1909
1910 #else
1911 #ifdef TIOCSSIZE
1912
1913 /* SunOS - style. */
1914 struct ttysize size;
1915 size.ts_lines = height;
1916 size.ts_cols = width;
1917
1918 if (ioctl (fd, TIOCGSIZE, &size) == -1)
1919 return 0;
1920 else
1921 return 1;
1922 #else
1923 return -1;
1924 #endif /* not SunOS-style */
1925 #endif /* not BSD-style */
1926 }
1927
1928 \f
1929
1930 /* Prepare all terminal devices for exiting Emacs. */
1931
1932 void
1933 reset_all_sys_modes (void)
1934 {
1935 struct tty_display_info *tty;
1936 for (tty = tty_list; tty; tty = tty->next)
1937 reset_sys_modes (tty);
1938 }
1939
1940 /* Prepare the terminal for closing it; move the cursor to the
1941 bottom of the frame, turn off interrupt-driven I/O, etc. */
1942
1943 void
1944 reset_sys_modes (tty_out)
1945 struct tty_display_info *tty_out;
1946 {
1947 if (noninteractive)
1948 {
1949 fflush (stdout);
1950 return;
1951 }
1952 if (!tty_out->term_initted)
1953 return;
1954
1955 if (!tty_out->output)
1956 return; /* The tty is suspended. */
1957
1958 /* Go to and clear the last line of the terminal. */
1959
1960 cmgoto (tty_out, FrameRows (tty_out) - 1, 0);
1961
1962 /* Code adapted from tty_clear_end_of_line. */
1963 if (tty_out->TS_clr_line)
1964 {
1965 emacs_tputs (tty_out, tty_out->TS_clr_line, 1, cmputc);
1966 }
1967 else
1968 { /* have to do it the hard way */
1969 int i;
1970 tty_turn_off_insert (tty_out);
1971
1972 for (i = curX (tty_out); i < FrameCols (tty_out) - 1; i++)
1973 {
1974 fputc (' ', tty_out->output);
1975 }
1976 }
1977
1978 cmgoto (tty_out, FrameRows (tty_out) - 1, 0);
1979 fflush (tty_out->output);
1980
1981 #if defined (IBMR2AIX) && defined (AIXHFT)
1982 {
1983 /* HFT devices normally use ^J as a LF/CR. We forced it to
1984 do the LF only. Now, we need to reset it. */
1985 struct termio tty;
1986
1987 if (ioctl (1, HFTGETID, &tty) != -1)
1988 write (1, "\033[20h", 5);
1989 }
1990 #endif
1991
1992 tty_reset_terminal_modes (tty_out->terminal);
1993
1994 #ifdef BSD_SYSTEM
1995 #ifndef BSD4_1
1996 /* Avoid possible loss of output when changing terminal modes. */
1997 fsync (fileno (tty_out->output));
1998 #endif
1999 #endif
2000
2001 #ifdef F_SETFL
2002 #ifndef F_SETOWN_BUG
2003 #ifdef F_SETOWN /* F_SETFL does not imply existence of F_SETOWN */
2004 if (interrupt_input)
2005 {
2006 reset_sigio (fileno (tty_out->input));
2007 fcntl (fileno (tty_out->input), F_SETOWN,
2008 old_fcntl_owner[fileno (tty_out->input)]);
2009 }
2010 #endif /* F_SETOWN */
2011 #endif /* F_SETOWN_BUG */
2012 #ifdef O_NDELAY
2013 fcntl (fileno (tty_out->input), F_SETFL,
2014 fcntl (fileno (tty_out->input), F_GETFL, 0) & ~O_NDELAY);
2015 #endif
2016 #endif /* F_SETFL */
2017 #ifdef BSD4_1
2018 if (interrupt_input)
2019 reset_sigio (fileno (tty_out->input));
2020 #endif /* BSD4_1 */
2021
2022 if (tty_out->old_tty)
2023 while (EMACS_SET_TTY (fileno (tty_out->input),
2024 tty_out->old_tty, 0) < 0 && errno == EINTR)
2025 ;
2026
2027 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */
2028 dos_ttcooked ();
2029 #endif
2030
2031 #ifdef SET_LINE_DISCIPLINE
2032 /* Ultrix's termios *ignores* any line discipline except TERMIODISC.
2033 A different old line discipline is therefore not restored, yet.
2034 Restore the old line discipline by hand. */
2035 ioctl (0, TIOCSETD, &tty_out->old_tty.main.c_line);
2036 #endif
2037
2038 #ifdef AIXHFT
2039 hft_reset ();
2040 #endif
2041
2042 #ifdef BSD_PGRPS
2043 widen_foreground_group (fileno (tty_out->input));
2044 #endif
2045 }
2046 \f
2047 #ifdef HAVE_PTYS
2048
2049 /* Set up the proper status flags for use of a pty. */
2050
2051 void
2052 setup_pty (fd)
2053 int fd;
2054 {
2055 /* I'm told that TOICREMOTE does not mean control chars
2056 "can't be sent" but rather that they don't have
2057 input-editing or signaling effects.
2058 That should be good, because we have other ways
2059 to do those things in Emacs.
2060 However, telnet mode seems not to work on 4.2.
2061 So TIOCREMOTE is turned off now. */
2062
2063 /* Under hp-ux, if TIOCREMOTE is turned on, some calls
2064 will hang. In particular, the "timeout" feature (which
2065 causes a read to return if there is no data available)
2066 does this. Also it is known that telnet mode will hang
2067 in such a way that Emacs must be stopped (perhaps this
2068 is the same problem).
2069
2070 If TIOCREMOTE is turned off, then there is a bug in
2071 hp-ux which sometimes loses data. Apparently the
2072 code which blocks the master process when the internal
2073 buffer fills up does not work. Other than this,
2074 though, everything else seems to work fine.
2075
2076 Since the latter lossage is more benign, we may as well
2077 lose that way. -- cph */
2078 #ifdef FIONBIO
2079 #if defined(SYSV_PTYS) || defined(UNIX98_PTYS)
2080 {
2081 int on = 1;
2082 ioctl (fd, FIONBIO, &on);
2083 }
2084 #endif
2085 #endif
2086 #ifdef IBMRTAIX
2087 /* On AIX, the parent gets SIGHUP when a pty attached child dies. So, we */
2088 /* ignore SIGHUP once we've started a child on a pty. Note that this may */
2089 /* cause EMACS not to die when it should, i.e., when its own controlling */
2090 /* tty goes away. I've complained to the AIX developers, and they may */
2091 /* change this behavior, but I'm not going to hold my breath. */
2092 signal (SIGHUP, SIG_IGN);
2093 #endif
2094 }
2095 #endif /* HAVE_PTYS */
2096 \f
2097 #ifdef VMS
2098
2099 /* Assigning an input channel is done at the start of Emacs execution.
2100 This is called each time Emacs is resumed, also, but does nothing
2101 because input_chain is no longer zero. */
2102
2103 void
2104 init_vms_input ()
2105 {
2106 int status;
2107
2108 if (fileno (CURTTY ()->input)) == 0)
2109 {
2110 status = SYS$ASSIGN (&input_dsc, &fileno (CURTTY ()->input)), 0, 0);
2111 if (! (status & 1))
2112 LIB$STOP (status);
2113 }
2114 }
2115
2116 /* Deassigning the input channel is done before exiting. */
2117
2118 void
2119 stop_vms_input ()
2120 {
2121 return SYS$DASSGN (fileno (CURTTY ()->input)));
2122 }
2123
2124 short input_buffer;
2125
2126 /* Request reading one character into the keyboard buffer.
2127 This is done as soon as the buffer becomes empty. */
2128
2129 void
2130 queue_kbd_input ()
2131 {
2132 int status;
2133 extern kbd_input_ast ();
2134
2135 waiting_for_ast = 0;
2136 stop_input = 0;
2137 status = SYS$QIO (0, fileno (CURTTY()->input), IO$_READVBLK,
2138 &input_iosb, kbd_input_ast, 1,
2139 &input_buffer, 1, 0, terminator_mask, 0, 0);
2140 }
2141
2142 int input_count;
2143
2144 /* Ast routine that is called when keyboard input comes in
2145 in accord with the SYS$QIO above. */
2146
2147 void
2148 kbd_input_ast ()
2149 {
2150 register int c = -1;
2151 int old_errno = errno;
2152 extern EMACS_TIME *input_available_clear_time;
2153
2154 if (waiting_for_ast)
2155 SYS$SETEF (input_ef);
2156 waiting_for_ast = 0;
2157 input_count++;
2158 #ifdef ASTDEBUG
2159 if (input_count == 25)
2160 exit (1);
2161 printf ("Ast # %d,", input_count);
2162 printf (" iosb = %x, %x, %x, %x",
2163 input_iosb.offset, input_iosb.status, input_iosb.termlen,
2164 input_iosb.term);
2165 #endif
2166 if (input_iosb.offset)
2167 {
2168 c = input_buffer;
2169 #ifdef ASTDEBUG
2170 printf (", char = 0%o", c);
2171 #endif
2172 }
2173 #ifdef ASTDEBUG
2174 printf ("\n");
2175 fflush (stdout);
2176 sleep (1);
2177 #endif
2178 if (! stop_input)
2179 queue_kbd_input ();
2180 if (c >= 0)
2181 {
2182 struct input_event e;
2183 EVENT_INIT (e);
2184
2185 e.kind = ASCII_KEYSTROKE_EVENT;
2186 XSETINT (e.code, c);
2187 e.frame_or_window = selected_frame;
2188 kbd_buffer_store_event (&e);
2189 }
2190 if (input_available_clear_time)
2191 EMACS_SET_SECS_USECS (*input_available_clear_time, 0, 0);
2192 errno = old_errno;
2193 }
2194
2195 /* Wait until there is something in kbd_buffer. */
2196
2197 void
2198 wait_for_kbd_input ()
2199 {
2200 extern int have_process_input, process_exited;
2201
2202 /* If already something, avoid doing system calls. */
2203 if (detect_input_pending ())
2204 {
2205 return;
2206 }
2207 /* Clear a flag, and tell ast routine above to set it. */
2208 SYS$CLREF (input_ef);
2209 waiting_for_ast = 1;
2210 /* Check for timing error: ast happened while we were doing that. */
2211 if (!detect_input_pending ())
2212 {
2213 /* No timing error: wait for flag to be set. */
2214 set_waiting_for_input (0);
2215 SYS$WFLOR (input_ef, input_eflist);
2216 clear_waiting_for_input ();
2217 if (!detect_input_pending ())
2218 /* Check for subprocess input availability */
2219 {
2220 int dsp = have_process_input || process_exited;
2221
2222 SYS$CLREF (process_ef);
2223 if (have_process_input)
2224 process_command_input ();
2225 if (process_exited)
2226 process_exit ();
2227 if (dsp)
2228 {
2229 update_mode_lines++;
2230 prepare_menu_bars ();
2231 redisplay_preserve_echo_area (18);
2232 }
2233 }
2234 }
2235 waiting_for_ast = 0;
2236 }
2237
2238 /* Get rid of any pending QIO, when we are about to suspend
2239 or when we want to throw away pending input.
2240 We wait for a positive sign that the AST routine has run
2241 and therefore there is no I/O request queued when we return.
2242 SYS$SETAST is used to avoid a timing error. */
2243
2244 void
2245 end_kbd_input ()
2246 {
2247 #ifdef ASTDEBUG
2248 printf ("At end_kbd_input.\n");
2249 fflush (stdout);
2250 sleep (1);
2251 #endif
2252 if (LIB$AST_IN_PROG ()) /* Don't wait if suspending from kbd_buffer_store_event! */
2253 {
2254 SYS$CANCEL (fileno (CURTTY()->input));
2255 return;
2256 }
2257
2258 SYS$SETAST (0);
2259 /* Clear a flag, and tell ast routine above to set it. */
2260 SYS$CLREF (input_ef);
2261 waiting_for_ast = 1;
2262 stop_input = 1;
2263 SYS$CANCEL (fileno (CURTTY()->input));
2264 SYS$SETAST (1);
2265 SYS$WAITFR (input_ef);
2266 waiting_for_ast = 0;
2267 }
2268
2269 /* Wait for either input available or time interval expiry. */
2270
2271 void
2272 input_wait_timeout (timeval)
2273 int timeval; /* Time to wait, in seconds */
2274 {
2275 int time [2];
2276 static int zero = 0;
2277 static int large = -10000000;
2278
2279 LIB$EMUL (&timeval, &large, &zero, time); /* Convert to VMS format */
2280
2281 /* If already something, avoid doing system calls. */
2282 if (detect_input_pending ())
2283 {
2284 return;
2285 }
2286 /* Clear a flag, and tell ast routine above to set it. */
2287 SYS$CLREF (input_ef);
2288 waiting_for_ast = 1;
2289 /* Check for timing error: ast happened while we were doing that. */
2290 if (!detect_input_pending ())
2291 {
2292 /* No timing error: wait for flag to be set. */
2293 SYS$CANTIM (1, 0);
2294 if (SYS$SETIMR (timer_ef, time, 0, 1) & 1) /* Set timer */
2295 SYS$WFLOR (timer_ef, timer_eflist); /* Wait for timer expiry or input */
2296 }
2297 waiting_for_ast = 0;
2298 }
2299
2300 /* The standard `sleep' routine works some other way
2301 and it stops working if you have ever quit out of it.
2302 This one continues to work. */
2303
2304 sys_sleep (timeval)
2305 int timeval;
2306 {
2307 int time [2];
2308 static int zero = 0;
2309 static int large = -10000000;
2310
2311 LIB$EMUL (&timeval, &large, &zero, time); /* Convert to VMS format */
2312
2313 SYS$CANTIM (1, 0);
2314 if (SYS$SETIMR (timer_ef, time, 0, 1) & 1) /* Set timer */
2315 SYS$WAITFR (timer_ef); /* Wait for timer expiry only */
2316 }
2317
2318 void
2319 init_sigio (fd)
2320 int fd;
2321 {
2322 request_sigio ();
2323 }
2324
2325 reset_sigio (fd)
2326 int fd;
2327 {
2328 unrequest_sigio ();
2329 }
2330
2331 void
2332 request_sigio ()
2333 {
2334 if (noninteractive)
2335 return;
2336 croak ("request sigio");
2337 }
2338
2339 void
2340 unrequest_sigio ()
2341 {
2342 if (noninteractive)
2343 return;
2344 croak ("unrequest sigio");
2345 }
2346
2347 #endif /* VMS */
2348 \f
2349 /* Note that VMS compiler won't accept defined (CANNOT_DUMP). */
2350 #ifndef CANNOT_DUMP
2351 #define NEED_STARTS
2352 #endif
2353
2354 #ifndef SYSTEM_MALLOC
2355 #ifndef NEED_STARTS
2356 #define NEED_STARTS
2357 #endif
2358 #endif
2359
2360 #ifdef NEED_STARTS
2361 /* Some systems that cannot dump also cannot implement these. */
2362
2363 /*
2364 * Return the address of the start of the text segment prior to
2365 * doing an unexec. After unexec the return value is undefined.
2366 * See crt0.c for further explanation and _start.
2367 *
2368 */
2369
2370 #if !(defined (__NetBSD__) && defined (__ELF__))
2371 #ifndef HAVE_TEXT_START
2372 char *
2373 start_of_text ()
2374 {
2375 #ifdef TEXT_START
2376 return ((char *) TEXT_START);
2377 #else
2378 #ifdef GOULD
2379 extern csrt ();
2380 return ((char *) csrt);
2381 #else /* not GOULD */
2382 extern int _start ();
2383 return ((char *) _start);
2384 #endif /* GOULD */
2385 #endif /* TEXT_START */
2386 }
2387 #endif /* not HAVE_TEXT_START */
2388 #endif
2389
2390 /*
2391 * Return the address of the start of the data segment prior to
2392 * doing an unexec. After unexec the return value is undefined.
2393 * See crt0.c for further information and definition of data_start.
2394 *
2395 * Apparently, on BSD systems this is etext at startup. On
2396 * USG systems (swapping) this is highly mmu dependent and
2397 * is also dependent on whether or not the program is running
2398 * with shared text. Generally there is a (possibly large)
2399 * gap between end of text and start of data with shared text.
2400 *
2401 * On Uniplus+ systems with shared text, data starts at a
2402 * fixed address. Each port (from a given oem) is generally
2403 * different, and the specific value of the start of data can
2404 * be obtained via the UniPlus+ specific "uvar" system call,
2405 * however the method outlined in crt0.c seems to be more portable.
2406 *
2407 * Probably what will have to happen when a USG unexec is available,
2408 * at least on UniPlus, is temacs will have to be made unshared so
2409 * that text and data are contiguous. Then once loadup is complete,
2410 * unexec will produce a shared executable where the data can be
2411 * at the normal shared text boundary and the startofdata variable
2412 * will be patched by unexec to the correct value.
2413 *
2414 */
2415
2416 #ifndef start_of_data
2417 char *
2418 start_of_data ()
2419 {
2420 #ifdef DATA_START
2421 return ((char *) DATA_START);
2422 #else
2423 #ifdef ORDINARY_LINK
2424 /*
2425 * This is a hack. Since we're not linking crt0.c or pre_crt0.c,
2426 * data_start isn't defined. We take the address of environ, which
2427 * is known to live at or near the start of the system crt0.c, and
2428 * we don't sweat the handful of bytes that might lose.
2429 */
2430 extern char **environ;
2431
2432 return ((char *) &environ);
2433 #else
2434 extern int data_start;
2435 return ((char *) &data_start);
2436 #endif /* ORDINARY_LINK */
2437 #endif /* DATA_START */
2438 }
2439 #endif /* start_of_data */
2440 #endif /* NEED_STARTS (not CANNOT_DUMP or not SYSTEM_MALLOC) */
2441 \f
2442 /* init_system_name sets up the string for the Lisp function
2443 system-name to return. */
2444
2445 #ifdef BSD4_1
2446 #include <whoami.h>
2447 #endif
2448
2449 extern Lisp_Object Vsystem_name;
2450
2451 #ifndef BSD4_1
2452 #ifndef VMS
2453 #ifdef HAVE_SOCKETS
2454 #include <sys/socket.h>
2455 #include <netdb.h>
2456 #endif /* HAVE_SOCKETS */
2457 #endif /* not VMS */
2458 #endif /* not BSD4_1 */
2459
2460 #ifdef TRY_AGAIN
2461 #ifndef HAVE_H_ERRNO
2462 extern int h_errno;
2463 #endif
2464 #endif /* TRY_AGAIN */
2465
2466 void
2467 init_system_name ()
2468 {
2469 #ifdef BSD4_1
2470 Vsystem_name = build_string (sysname);
2471 #else
2472 #ifdef VMS
2473 char *sp, *end;
2474 if ((sp = egetenv ("SYS$NODE")) == 0)
2475 Vsystem_name = build_string ("vax-vms");
2476 else if ((end = index (sp, ':')) == 0)
2477 Vsystem_name = build_string (sp);
2478 else
2479 Vsystem_name = make_string (sp, end - sp);
2480 #else
2481 #ifndef HAVE_GETHOSTNAME
2482 struct utsname uts;
2483 uname (&uts);
2484 Vsystem_name = build_string (uts.nodename);
2485 #else /* HAVE_GETHOSTNAME */
2486 unsigned int hostname_size = 256;
2487 char *hostname = (char *) alloca (hostname_size);
2488
2489 /* Try to get the host name; if the buffer is too short, try
2490 again. Apparently, the only indication gethostname gives of
2491 whether the buffer was large enough is the presence or absence
2492 of a '\0' in the string. Eech. */
2493 for (;;)
2494 {
2495 gethostname (hostname, hostname_size - 1);
2496 hostname[hostname_size - 1] = '\0';
2497
2498 /* Was the buffer large enough for the '\0'? */
2499 if (strlen (hostname) < hostname_size - 1)
2500 break;
2501
2502 hostname_size <<= 1;
2503 hostname = (char *) alloca (hostname_size);
2504 }
2505 #ifdef HAVE_SOCKETS
2506 /* Turn the hostname into the official, fully-qualified hostname.
2507 Don't do this if we're going to dump; this can confuse system
2508 libraries on some machines and make the dumped emacs core dump. */
2509 #ifndef CANNOT_DUMP
2510 if (initialized)
2511 #endif /* not CANNOT_DUMP */
2512 if (! index (hostname, '.'))
2513 {
2514 struct hostent *hp;
2515 int count;
2516 for (count = 0;; count++)
2517 {
2518 #ifdef TRY_AGAIN
2519 h_errno = 0;
2520 #endif
2521 hp = gethostbyname (hostname);
2522 #ifdef TRY_AGAIN
2523 if (! (hp == 0 && h_errno == TRY_AGAIN))
2524 #endif
2525 break;
2526 if (count >= 5)
2527 break;
2528 Fsleep_for (make_number (1), Qnil);
2529 }
2530 if (hp)
2531 {
2532 char *fqdn = (char *) hp->h_name;
2533 #if 0
2534 char *p;
2535 #endif
2536
2537 if (!index (fqdn, '.'))
2538 {
2539 /* We still don't have a fully qualified domain name.
2540 Try to find one in the list of alternate names */
2541 char **alias = hp->h_aliases;
2542 while (*alias
2543 && (!index (*alias, '.')
2544 || !strcmp (*alias, "localhost.localdomain")))
2545 alias++;
2546 if (*alias)
2547 fqdn = *alias;
2548 }
2549 hostname = fqdn;
2550 #if 0
2551 /* Convert the host name to lower case. */
2552 /* Using ctype.h here would introduce a possible locale
2553 dependence that is probably wrong for hostnames. */
2554 p = hostname;
2555 while (*p)
2556 {
2557 if (*p >= 'A' && *p <= 'Z')
2558 *p += 'a' - 'A';
2559 p++;
2560 }
2561 #endif
2562 }
2563 }
2564 #endif /* HAVE_SOCKETS */
2565 /* We used to try using getdomainname here,
2566 but NIIBE Yutaka <gniibe@etl.go.jp> says that
2567 getdomainname gets the NIS/YP domain which often is not the same
2568 as in Internet domain name. */
2569 #if 0 /* Turned off because sysinfo is not really likely to return the
2570 correct Internet domain. */
2571 #if (HAVE_SYSINFO && defined (SI_SRPC_DOMAIN))
2572 if (! index (hostname, '.'))
2573 {
2574 /* The hostname is not fully qualified. Append the domain name. */
2575
2576 int hostlen = strlen (hostname);
2577 int domain_size = 256;
2578
2579 for (;;)
2580 {
2581 char *domain = (char *) alloca (domain_size + 1);
2582 char *fqdn = (char *) alloca (hostlen + 1 + domain_size + 1);
2583 int sys_domain_size = sysinfo (SI_SRPC_DOMAIN, domain, domain_size);
2584 if (sys_domain_size <= 0)
2585 break;
2586 if (domain_size < sys_domain_size)
2587 {
2588 domain_size = sys_domain_size;
2589 continue;
2590 }
2591 strcpy (fqdn, hostname);
2592 if (domain[0] == '.')
2593 strcpy (fqdn + hostlen, domain);
2594 else if (domain[0] != 0)
2595 {
2596 fqdn[hostlen] = '.';
2597 strcpy (fqdn + hostlen + 1, domain);
2598 }
2599 hostname = fqdn;
2600 break;
2601 }
2602 }
2603 #endif /* HAVE_SYSINFO && defined (SI_SRPC_DOMAIN) */
2604 #endif /* 0 */
2605 Vsystem_name = build_string (hostname);
2606 #endif /* HAVE_GETHOSTNAME */
2607 #endif /* VMS */
2608 #endif /* BSD4_1 */
2609 {
2610 unsigned char *p;
2611 for (p = SDATA (Vsystem_name); *p; p++)
2612 if (*p == ' ' || *p == '\t')
2613 *p = '-';
2614 }
2615 }
2616 \f
2617 #ifndef MSDOS
2618 #ifndef VMS
2619 #if !defined (HAVE_SELECT) || defined (BROKEN_SELECT_NON_X)
2620
2621 #include "sysselect.h"
2622 #undef select
2623
2624 #if defined (HAVE_X_WINDOWS) && !defined (HAVE_SELECT)
2625 /* Cause explanatory error message at compile time,
2626 since the select emulation is not good enough for X. */
2627 int *x = &x_windows_lose_if_no_select_system_call;
2628 #endif
2629
2630 /* Emulate as much as select as is possible under 4.1 and needed by Gnu Emacs
2631 * Only checks read descriptors.
2632 */
2633 /* How long to wait between checking fds in select */
2634 #define SELECT_PAUSE 1
2635 int select_alarmed;
2636
2637 /* For longjmp'ing back to read_input_waiting. */
2638
2639 jmp_buf read_alarm_throw;
2640
2641 /* Nonzero if the alarm signal should throw back to read_input_waiting.
2642 The read_socket_hook function sets this to 1 while it is waiting. */
2643
2644 int read_alarm_should_throw;
2645
2646 SIGTYPE
2647 select_alarm ()
2648 {
2649 select_alarmed = 1;
2650 #ifdef BSD4_1
2651 sigrelse (SIGALRM);
2652 #else /* not BSD4_1 */
2653 signal (SIGALRM, SIG_IGN);
2654 #endif /* not BSD4_1 */
2655 SIGNAL_THREAD_CHECK (SIGALRM);
2656 if (read_alarm_should_throw)
2657 longjmp (read_alarm_throw, 1);
2658 }
2659
2660 #ifndef WINDOWSNT
2661 /* Only rfds are checked. */
2662 int
2663 sys_select (nfds, rfds, wfds, efds, timeout)
2664 int nfds;
2665 SELECT_TYPE *rfds, *wfds, *efds;
2666 EMACS_TIME *timeout;
2667 {
2668 /* XXX This needs to be updated for multi-tty support. Is there
2669 anybody who needs to emulate select these days? */
2670 int ravail = 0;
2671 SELECT_TYPE orfds;
2672 int timeoutval;
2673 int *local_timeout;
2674 extern int proc_buffered_char[];
2675 #ifndef subprocesses
2676 int process_tick = 0, update_tick = 0;
2677 #else
2678 extern int process_tick, update_tick;
2679 #endif
2680 unsigned char buf;
2681
2682 #if defined (HAVE_SELECT) && defined (HAVE_X_WINDOWS)
2683 /* If we're using X, then the native select will work; we only need the
2684 emulation for non-X usage. */
2685 if (!NILP (Vinitial_window_system))
2686 return select (nfds, rfds, wfds, efds, timeout);
2687 #endif
2688 timeoutval = timeout ? EMACS_SECS (*timeout) : 100000;
2689 local_timeout = &timeoutval;
2690 FD_ZERO (&orfds);
2691 if (rfds)
2692 {
2693 orfds = *rfds;
2694 FD_ZERO (rfds);
2695 }
2696 if (wfds)
2697 FD_ZERO (wfds);
2698 if (efds)
2699 FD_ZERO (efds);
2700
2701 /* If we are looking only for the terminal, with no timeout,
2702 just read it and wait -- that's more efficient. */
2703 if (*local_timeout == 100000 && process_tick == update_tick
2704 && FD_ISSET (0, &orfds))
2705 {
2706 int fd;
2707 for (fd = 1; fd < nfds; ++fd)
2708 if (FD_ISSET (fd, &orfds))
2709 goto hardway;
2710 if (! detect_input_pending ())
2711 read_input_waiting ();
2712 FD_SET (0, rfds);
2713 return 1;
2714 }
2715
2716 hardway:
2717 /* Once a second, till the timer expires, check all the flagged read
2718 * descriptors to see if any input is available. If there is some then
2719 * set the corresponding bit in the return copy of rfds.
2720 */
2721 while (1)
2722 {
2723 register int to_check, fd;
2724
2725 if (rfds)
2726 {
2727 for (to_check = nfds, fd = 0; --to_check >= 0; fd++)
2728 {
2729 if (FD_ISSET (fd, &orfds))
2730 {
2731 int avail = 0, status = 0;
2732
2733 if (fd == 0)
2734 avail = detect_input_pending (); /* Special keyboard handler */
2735 else
2736 {
2737 #ifdef FIONREAD
2738 status = ioctl (fd, FIONREAD, &avail);
2739 #else /* no FIONREAD */
2740 /* Hoping it will return -1 if nothing available
2741 or 0 if all 0 chars requested are read. */
2742 if (proc_buffered_char[fd] >= 0)
2743 avail = 1;
2744 else
2745 {
2746 avail = read (fd, &buf, 1);
2747 if (avail > 0)
2748 proc_buffered_char[fd] = buf;
2749 }
2750 #endif /* no FIONREAD */
2751 }
2752 if (status >= 0 && avail > 0)
2753 {
2754 FD_SET (fd, rfds);
2755 ravail++;
2756 }
2757 }
2758 }
2759 }
2760 if (*local_timeout == 0 || ravail != 0 || process_tick != update_tick)
2761 break;
2762
2763 turn_on_atimers (0);
2764 signal (SIGALRM, select_alarm);
2765 select_alarmed = 0;
2766 alarm (SELECT_PAUSE);
2767
2768 /* Wait for a SIGALRM (or maybe a SIGTINT) */
2769 while (select_alarmed == 0 && *local_timeout != 0
2770 && process_tick == update_tick)
2771 {
2772 /* If we are interested in terminal input,
2773 wait by reading the terminal.
2774 That makes instant wakeup for terminal input at least. */
2775 if (FD_ISSET (0, &orfds))
2776 {
2777 read_input_waiting ();
2778 if (detect_input_pending ())
2779 select_alarmed = 1;
2780 }
2781 else
2782 pause ();
2783 }
2784 (*local_timeout) -= SELECT_PAUSE;
2785
2786 /* Reset the old alarm if there was one. */
2787 turn_on_atimers (1);
2788
2789 if (*local_timeout == 0) /* Stop on timer being cleared */
2790 break;
2791 }
2792 return ravail;
2793 }
2794 #endif /* not WINDOWSNT */
2795
2796 /* Read keyboard input into the standard buffer,
2797 waiting for at least one character. */
2798
2799 void
2800 read_input_waiting ()
2801 {
2802 /* XXX This needs to be updated for multi-tty support. Is there
2803 anybody who needs to emulate select these days? */
2804 int nread, i;
2805 extern int quit_char;
2806
2807 if (read_socket_hook)
2808 {
2809 struct input_event hold_quit;
2810
2811 EVENT_INIT (hold_quit);
2812 hold_quit.kind = NO_EVENT;
2813
2814 read_alarm_should_throw = 0;
2815 if (! setjmp (read_alarm_throw))
2816 nread = (*read_socket_hook) (0, 1, &hold_quit);
2817 else
2818 nread = -1;
2819
2820 if (hold_quit.kind != NO_EVENT)
2821 kbd_buffer_store_event (&hold_quit);
2822 }
2823 else
2824 {
2825 struct input_event e;
2826 char buf[3];
2827 nread = read (fileno (stdin), buf, 1);
2828 EVENT_INIT (e);
2829
2830 /* Scan the chars for C-g and store them in kbd_buffer. */
2831 e.kind = ASCII_KEYSTROKE_EVENT;
2832 e.frame_or_window = selected_frame;
2833 e.modifiers = 0;
2834 for (i = 0; i < nread; i++)
2835 {
2836 /* Convert chars > 0177 to meta events if desired.
2837 We do this under the same conditions that read_avail_input does. */
2838 if (read_socket_hook == 0)
2839 {
2840 /* If the user says she has a meta key, then believe her. */
2841 if (meta_key == 1 && (buf[i] & 0x80))
2842 e.modifiers = meta_modifier;
2843 if (meta_key != 2)
2844 buf[i] &= ~0x80;
2845 }
2846
2847 XSETINT (e.code, buf[i]);
2848 kbd_buffer_store_event (&e);
2849 /* Don't look at input that follows a C-g too closely.
2850 This reduces lossage due to autorepeat on C-g. */
2851 if (buf[i] == quit_char)
2852 break;
2853 }
2854 }
2855 }
2856
2857 #if !defined (HAVE_SELECT) || defined (BROKEN_SELECT_NON_X)
2858 #define select sys_select
2859 #endif
2860
2861 #endif /* not HAVE_SELECT */
2862 #endif /* not VMS */
2863 #endif /* not MSDOS */
2864 \f
2865 #ifdef BSD4_1
2866 void
2867 init_sigio (fd)
2868 int fd;
2869 {
2870 if (noninteractive)
2871 return;
2872 lmode = LINTRUP | lmode;
2873 ioctl (fd, TIOCLSET, &lmode);
2874 }
2875
2876 void
2877 reset_sigio (fd)
2878 int fd;
2879 {
2880 if (noninteractive)
2881 return;
2882 lmode = ~LINTRUP & lmode;
2883 ioctl (fd, TIOCLSET, &lmode);
2884 }
2885
2886 void
2887 request_sigio ()
2888 {
2889 if (noninteractive)
2890 return;
2891 sigrelse (SIGTINT);
2892
2893 interrupts_deferred = 0;
2894 }
2895
2896 void
2897 unrequest_sigio ()
2898 {
2899 if (noninteractive)
2900 return;
2901 sighold (SIGTINT);
2902
2903 interrupts_deferred = 1;
2904 }
2905
2906 /* still inside #ifdef BSD4_1 */
2907 #ifdef subprocesses
2908
2909 int sigheld; /* Mask of held signals */
2910
2911 void
2912 sigholdx (signum)
2913 int signum;
2914 {
2915 sigheld |= sigbit (signum);
2916 sighold (signum);
2917 }
2918
2919 void
2920 sigisheld (signum)
2921 int signum;
2922 {
2923 sigheld |= sigbit (signum);
2924 }
2925
2926 void
2927 sigunhold (signum)
2928 int signum;
2929 {
2930 sigheld &= ~sigbit (signum);
2931 sigrelse (signum);
2932 }
2933
2934 void
2935 sigfree () /* Free all held signals */
2936 {
2937 int i;
2938 for (i = 0; i < NSIG; i++)
2939 if (sigheld & sigbit (i))
2940 sigrelse (i);
2941 sigheld = 0;
2942 }
2943
2944 int
2945 sigbit (i)
2946 {
2947 return 1 << (i - 1);
2948 }
2949 #endif /* subprocesses */
2950 #endif /* BSD4_1 */
2951 \f
2952 /* POSIX signals support - DJB */
2953 /* Anyone with POSIX signals should have ANSI C declarations */
2954
2955 #ifdef POSIX_SIGNALS
2956
2957 sigset_t empty_mask, full_mask;
2958
2959 signal_handler_t
2960 sys_signal (int signal_number, signal_handler_t action)
2961 {
2962 struct sigaction new_action, old_action;
2963 sigemptyset (&new_action.sa_mask);
2964 new_action.sa_handler = action;
2965 #if defined (SA_RESTART) && ! defined (BROKEN_SA_RESTART) && !defined(SYNC_INPUT)
2966 /* Emacs mostly works better with restartable system services. If this
2967 flag exists, we probably want to turn it on here.
2968 However, on some systems this resets the timeout of `select'
2969 which means that `select' never finishes if it keeps getting signals.
2970 BROKEN_SA_RESTART is defined on those systems. */
2971 /* It's not clear why the comment above says "mostly works better". --Stef
2972 When SYNC_INPUT is set, we don't want SA_RESTART because we need to poll
2973 for pending input so we need long-running syscalls to be interrupted
2974 after a signal that sets the interrupt_input_pending flag. */
2975 new_action.sa_flags = SA_RESTART;
2976 #else
2977 new_action.sa_flags = 0;
2978 #endif
2979 sigaction (signal_number, &new_action, &old_action);
2980 return (old_action.sa_handler);
2981 }
2982
2983 #ifndef __GNUC__
2984 /* If we're compiling with GCC, we don't need this function, since it
2985 can be written as a macro. */
2986 sigset_t
2987 sys_sigmask (int sig)
2988 {
2989 sigset_t mask;
2990 sigemptyset (&mask);
2991 sigaddset (&mask, sig);
2992 return mask;
2993 }
2994 #endif
2995
2996 /* I'd like to have these guys return pointers to the mask storage in here,
2997 but there'd be trouble if the code was saving multiple masks. I'll be
2998 safe and pass the structure. It normally won't be more than 2 bytes
2999 anyhow. - DJB */
3000
3001 sigset_t
3002 sys_sigblock (sigset_t new_mask)
3003 {
3004 sigset_t old_mask;
3005 sigprocmask (SIG_BLOCK, &new_mask, &old_mask);
3006 return (old_mask);
3007 }
3008
3009 sigset_t
3010 sys_sigunblock (sigset_t new_mask)
3011 {
3012 sigset_t old_mask;
3013 sigprocmask (SIG_UNBLOCK, &new_mask, &old_mask);
3014 return (old_mask);
3015 }
3016
3017 sigset_t
3018 sys_sigsetmask (sigset_t new_mask)
3019 {
3020 sigset_t old_mask;
3021 sigprocmask (SIG_SETMASK, &new_mask, &old_mask);
3022 return (old_mask);
3023 }
3024
3025 #endif /* POSIX_SIGNALS */
3026 \f
3027 #if !defined HAVE_STRSIGNAL && !HAVE_DECL_SYS_SIGLIST
3028 static char *my_sys_siglist[NSIG];
3029 # ifdef sys_siglist
3030 # undef sys_siglist
3031 # endif
3032 # define sys_siglist my_sys_siglist
3033 #endif
3034
3035 void
3036 init_signals ()
3037 {
3038 #ifdef POSIX_SIGNALS
3039 sigemptyset (&empty_mask);
3040 sigfillset (&full_mask);
3041 #endif
3042
3043 #if !defined HAVE_STRSIGNAL && !HAVE_DECL_SYS_SIGLIST
3044 if (! initialized)
3045 {
3046 # ifdef SIGABRT
3047 sys_siglist[SIGABRT] = "Aborted";
3048 # endif
3049 # ifdef SIGAIO
3050 sys_siglist[SIGAIO] = "LAN I/O interrupt";
3051 # endif
3052 # ifdef SIGALRM
3053 sys_siglist[SIGALRM] = "Alarm clock";
3054 # endif
3055 # ifdef SIGBUS
3056 sys_siglist[SIGBUS] = "Bus error";
3057 # endif
3058 # ifdef SIGCLD
3059 sys_siglist[SIGCLD] = "Child status changed";
3060 # endif
3061 # ifdef SIGCHLD
3062 sys_siglist[SIGCHLD] = "Child status changed";
3063 # endif
3064 # ifdef SIGCONT
3065 sys_siglist[SIGCONT] = "Continued";
3066 # endif
3067 # ifdef SIGDANGER
3068 sys_siglist[SIGDANGER] = "Swap space dangerously low";
3069 # endif
3070 # ifdef SIGDGNOTIFY
3071 sys_siglist[SIGDGNOTIFY] = "Notification message in queue";
3072 # endif
3073 # ifdef SIGEMT
3074 sys_siglist[SIGEMT] = "Emulation trap";
3075 # endif
3076 # ifdef SIGFPE
3077 sys_siglist[SIGFPE] = "Arithmetic exception";
3078 # endif
3079 # ifdef SIGFREEZE
3080 sys_siglist[SIGFREEZE] = "SIGFREEZE";
3081 # endif
3082 # ifdef SIGGRANT
3083 sys_siglist[SIGGRANT] = "Monitor mode granted";
3084 # endif
3085 # ifdef SIGHUP
3086 sys_siglist[SIGHUP] = "Hangup";
3087 # endif
3088 # ifdef SIGILL
3089 sys_siglist[SIGILL] = "Illegal instruction";
3090 # endif
3091 # ifdef SIGINT
3092 sys_siglist[SIGINT] = "Interrupt";
3093 # endif
3094 # ifdef SIGIO
3095 sys_siglist[SIGIO] = "I/O possible";
3096 # endif
3097 # ifdef SIGIOINT
3098 sys_siglist[SIGIOINT] = "I/O intervention required";
3099 # endif
3100 # ifdef SIGIOT
3101 sys_siglist[SIGIOT] = "IOT trap";
3102 # endif
3103 # ifdef SIGKILL
3104 sys_siglist[SIGKILL] = "Killed";
3105 # endif
3106 # ifdef SIGLOST
3107 sys_siglist[SIGLOST] = "Resource lost";
3108 # endif
3109 # ifdef SIGLWP
3110 sys_siglist[SIGLWP] = "SIGLWP";
3111 # endif
3112 # ifdef SIGMSG
3113 sys_siglist[SIGMSG] = "Monitor mode data available";
3114 # endif
3115 # ifdef SIGPHONE
3116 sys_siglist[SIGWIND] = "SIGPHONE";
3117 # endif
3118 # ifdef SIGPIPE
3119 sys_siglist[SIGPIPE] = "Broken pipe";
3120 # endif
3121 # ifdef SIGPOLL
3122 sys_siglist[SIGPOLL] = "Pollable event occurred";
3123 # endif
3124 # ifdef SIGPROF
3125 sys_siglist[SIGPROF] = "Profiling timer expired";
3126 # endif
3127 # ifdef SIGPTY
3128 sys_siglist[SIGPTY] = "PTY I/O interrupt";
3129 # endif
3130 # ifdef SIGPWR
3131 sys_siglist[SIGPWR] = "Power-fail restart";
3132 # endif
3133 # ifdef SIGQUIT
3134 sys_siglist[SIGQUIT] = "Quit";
3135 # endif
3136 # ifdef SIGRETRACT
3137 sys_siglist[SIGRETRACT] = "Need to relinguish monitor mode";
3138 # endif
3139 # ifdef SIGSAK
3140 sys_siglist[SIGSAK] = "Secure attention";
3141 # endif
3142 # ifdef SIGSEGV
3143 sys_siglist[SIGSEGV] = "Segmentation violation";
3144 # endif
3145 # ifdef SIGSOUND
3146 sys_siglist[SIGSOUND] = "Sound completed";
3147 # endif
3148 # ifdef SIGSTOP
3149 sys_siglist[SIGSTOP] = "Stopped (signal)";
3150 # endif
3151 # ifdef SIGSTP
3152 sys_siglist[SIGSTP] = "Stopped (user)";
3153 # endif
3154 # ifdef SIGSYS
3155 sys_siglist[SIGSYS] = "Bad argument to system call";
3156 # endif
3157 # ifdef SIGTERM
3158 sys_siglist[SIGTERM] = "Terminated";
3159 # endif
3160 # ifdef SIGTHAW
3161 sys_siglist[SIGTHAW] = "SIGTHAW";
3162 # endif
3163 # ifdef SIGTRAP
3164 sys_siglist[SIGTRAP] = "Trace/breakpoint trap";
3165 # endif
3166 # ifdef SIGTSTP
3167 sys_siglist[SIGTSTP] = "Stopped (user)";
3168 # endif
3169 # ifdef SIGTTIN
3170 sys_siglist[SIGTTIN] = "Stopped (tty input)";
3171 # endif
3172 # ifdef SIGTTOU
3173 sys_siglist[SIGTTOU] = "Stopped (tty output)";
3174 # endif
3175 # ifdef SIGURG
3176 sys_siglist[SIGURG] = "Urgent I/O condition";
3177 # endif
3178 # ifdef SIGUSR1
3179 sys_siglist[SIGUSR1] = "User defined signal 1";
3180 # endif
3181 # ifdef SIGUSR2
3182 sys_siglist[SIGUSR2] = "User defined signal 2";
3183 # endif
3184 # ifdef SIGVTALRM
3185 sys_siglist[SIGVTALRM] = "Virtual timer expired";
3186 # endif
3187 # ifdef SIGWAITING
3188 sys_siglist[SIGWAITING] = "Process's LWPs are blocked";
3189 # endif
3190 # ifdef SIGWINCH
3191 sys_siglist[SIGWINCH] = "Window size changed";
3192 # endif
3193 # ifdef SIGWIND
3194 sys_siglist[SIGWIND] = "SIGWIND";
3195 # endif
3196 # ifdef SIGXCPU
3197 sys_siglist[SIGXCPU] = "CPU time limit exceeded";
3198 # endif
3199 # ifdef SIGXFSZ
3200 sys_siglist[SIGXFSZ] = "File size limit exceeded";
3201 # endif
3202 }
3203 #endif /* !defined HAVE_STRSIGNAL && !defined HAVE_DECL_SYS_SIGLIST */
3204 }
3205 \f
3206 #ifndef HAVE_RANDOM
3207 #ifdef random
3208 #define HAVE_RANDOM
3209 #endif
3210 #endif
3211
3212 /* Figure out how many bits the system's random number generator uses.
3213 `random' and `lrand48' are assumed to return 31 usable bits.
3214 BSD `rand' returns a 31 bit value but the low order bits are unusable;
3215 so we'll shift it and treat it like the 15-bit USG `rand'. */
3216
3217 #ifndef RAND_BITS
3218 # ifdef HAVE_RANDOM
3219 # define RAND_BITS 31
3220 # else /* !HAVE_RANDOM */
3221 # ifdef HAVE_LRAND48
3222 # define RAND_BITS 31
3223 # define random lrand48
3224 # else /* !HAVE_LRAND48 */
3225 # define RAND_BITS 15
3226 # if RAND_MAX == 32767
3227 # define random rand
3228 # else /* RAND_MAX != 32767 */
3229 # if RAND_MAX == 2147483647
3230 # define random() (rand () >> 16)
3231 # else /* RAND_MAX != 2147483647 */
3232 # ifdef USG
3233 # define random rand
3234 # else
3235 # define random() (rand () >> 16)
3236 # endif /* !USG */
3237 # endif /* RAND_MAX != 2147483647 */
3238 # endif /* RAND_MAX != 32767 */
3239 # endif /* !HAVE_LRAND48 */
3240 # endif /* !HAVE_RANDOM */
3241 #endif /* !RAND_BITS */
3242
3243 void
3244 seed_random (arg)
3245 long arg;
3246 {
3247 #ifdef HAVE_RANDOM
3248 srandom ((unsigned int)arg);
3249 #else
3250 # ifdef HAVE_LRAND48
3251 srand48 (arg);
3252 # else
3253 srand ((unsigned int)arg);
3254 # endif
3255 #endif
3256 }
3257
3258 /*
3259 * Build a full Emacs-sized word out of whatever we've got.
3260 * This suffices even for a 64-bit architecture with a 15-bit rand.
3261 */
3262 long
3263 get_random ()
3264 {
3265 long val = random ();
3266 #if VALBITS > RAND_BITS
3267 val = (val << RAND_BITS) ^ random ();
3268 #if VALBITS > 2*RAND_BITS
3269 val = (val << RAND_BITS) ^ random ();
3270 #if VALBITS > 3*RAND_BITS
3271 val = (val << RAND_BITS) ^ random ();
3272 #if VALBITS > 4*RAND_BITS
3273 val = (val << RAND_BITS) ^ random ();
3274 #endif /* need at least 5 */
3275 #endif /* need at least 4 */
3276 #endif /* need at least 3 */
3277 #endif /* need at least 2 */
3278 return val & ((1L << VALBITS) - 1);
3279 }
3280 \f
3281 #ifdef WRONG_NAME_INSQUE
3282
3283 insque (q,p)
3284 caddr_t q,p;
3285 {
3286 _insque (q,p);
3287 }
3288
3289 #endif
3290 \f
3291 #ifdef VMS
3292
3293 #ifdef getenv
3294 /* If any place else asks for the TERM variable,
3295 allow it to be overridden with the EMACS_TERM variable
3296 before attempting to translate the logical name TERM. As a last
3297 resort, ask for VAX C's special idea of the TERM variable. */
3298 #undef getenv
3299 char *
3300 sys_getenv (name)
3301 char *name;
3302 {
3303 register char *val;
3304 static char buf[256];
3305 static struct dsc$descriptor_s equiv
3306 = {sizeof (buf), DSC$K_DTYPE_T, DSC$K_CLASS_S, buf};
3307 static struct dsc$descriptor_s d_name
3308 = {0, DSC$K_DTYPE_T, DSC$K_CLASS_S, 0};
3309 short eqlen;
3310
3311 if (!strcmp (name, "TERM"))
3312 {
3313 val = (char *) getenv ("EMACS_TERM");
3314 if (val)
3315 return val;
3316 }
3317
3318 d_name.dsc$w_length = strlen (name);
3319 d_name.dsc$a_pointer = name;
3320 if (LIB$SYS_TRNLOG (&d_name, &eqlen, &equiv) == 1)
3321 {
3322 char *str = (char *) xmalloc (eqlen + 1);
3323 bcopy (buf, str, eqlen);
3324 str[eqlen] = '\0';
3325 /* This is a storage leak, but a pain to fix. With luck,
3326 no one will ever notice. */
3327 return str;
3328 }
3329 return (char *) getenv (name);
3330 }
3331 #endif /* getenv */
3332
3333 #ifdef abort
3334 /* Since VMS doesn't believe in core dumps, the only way to debug this beast is
3335 to force a call on the debugger from within the image. */
3336 #undef abort
3337 sys_abort ()
3338 {
3339 reset_all_sys_modes ();
3340 LIB$SIGNAL (SS$_DEBUG);
3341 }
3342 #endif /* abort */
3343 #endif /* VMS */
3344 \f
3345 #ifdef VMS
3346 #ifdef LINK_CRTL_SHARE
3347 #ifdef SHARABLE_LIB_BUG
3348 /* Variables declared noshare and initialized in sharable libraries
3349 cannot be shared. The VMS linker incorrectly forces you to use a private
3350 version which is uninitialized... If not for this "feature", we
3351 could use the C library definition of sys_nerr and sys_errlist. */
3352 int sys_nerr = 35;
3353 char *sys_errlist[] =
3354 {
3355 "error 0",
3356 "not owner",
3357 "no such file or directory",
3358 "no such process",
3359 "interrupted system call",
3360 "i/o error",
3361 "no such device or address",
3362 "argument list too long",
3363 "exec format error",
3364 "bad file number",
3365 "no child process",
3366 "no more processes",
3367 "not enough memory",
3368 "permission denied",
3369 "bad address",
3370 "block device required",
3371 "mount devices busy",
3372 "file exists",
3373 "cross-device link",
3374 "no such device",
3375 "not a directory",
3376 "is a directory",
3377 "invalid argument",
3378 "file table overflow",
3379 "too many open files",
3380 "not a typewriter",
3381 "text file busy",
3382 "file too big",
3383 "no space left on device",
3384 "illegal seek",
3385 "read-only file system",
3386 "too many links",
3387 "broken pipe",
3388 "math argument",
3389 "result too large",
3390 "I/O stream empty",
3391 "vax/vms specific error code nontranslatable error"
3392 };
3393 #endif /* SHARABLE_LIB_BUG */
3394 #endif /* LINK_CRTL_SHARE */
3395 #endif /* VMS */
3396
3397 #ifndef HAVE_STRERROR
3398 #ifndef WINDOWSNT
3399 char *
3400 strerror (errnum)
3401 int errnum;
3402 {
3403 extern char *sys_errlist[];
3404 extern int sys_nerr;
3405
3406 if (errnum >= 0 && errnum < sys_nerr)
3407 return sys_errlist[errnum];
3408 return (char *) "Unknown error";
3409 }
3410 #endif /* not WINDOWSNT */
3411 #endif /* ! HAVE_STRERROR */
3412 \f
3413 int
3414 emacs_open (path, oflag, mode)
3415 const char *path;
3416 int oflag, mode;
3417 {
3418 register int rtnval;
3419
3420 #ifdef BSD4_1
3421 if (oflag & O_CREAT)
3422 return creat (path, mode);
3423 #endif
3424
3425 while ((rtnval = open (path, oflag, mode)) == -1
3426 && (errno == EINTR))
3427 QUIT;
3428 return (rtnval);
3429 }
3430
3431 int
3432 emacs_close (fd)
3433 int fd;
3434 {
3435 int did_retry = 0;
3436 register int rtnval;
3437
3438 while ((rtnval = close (fd)) == -1
3439 && (errno == EINTR))
3440 did_retry = 1;
3441
3442 /* If close is interrupted SunOS 4.1 may or may not have closed the
3443 file descriptor. If it did the second close will fail with
3444 errno = EBADF. That means we have succeeded. */
3445 if (rtnval == -1 && did_retry && errno == EBADF)
3446 return 0;
3447
3448 return rtnval;
3449 }
3450
3451 int
3452 emacs_read (fildes, buf, nbyte)
3453 int fildes;
3454 char *buf;
3455 unsigned int nbyte;
3456 {
3457 register int rtnval;
3458
3459 while ((rtnval = read (fildes, buf, nbyte)) == -1
3460 && (errno == EINTR))
3461 QUIT;
3462 return (rtnval);
3463 }
3464
3465 int
3466 emacs_write (fildes, buf, nbyte)
3467 int fildes;
3468 const char *buf;
3469 unsigned int nbyte;
3470 {
3471 register int rtnval, bytes_written;
3472
3473 bytes_written = 0;
3474
3475 while (nbyte > 0)
3476 {
3477 rtnval = write (fildes, buf, nbyte);
3478
3479 if (rtnval == -1)
3480 {
3481 if (errno == EINTR)
3482 {
3483 #ifdef SYNC_INPUT
3484 /* I originally used `QUIT' but that might causes files to
3485 be truncated if you hit C-g in the middle of it. --Stef */
3486 if (interrupt_input_pending)
3487 handle_async_input ();
3488 #endif
3489 continue;
3490 }
3491 else
3492 return (bytes_written ? bytes_written : -1);
3493 }
3494
3495 buf += rtnval;
3496 nbyte -= rtnval;
3497 bytes_written += rtnval;
3498 }
3499 return (bytes_written);
3500 }
3501 \f
3502 #ifdef USG
3503 /*
3504 * All of the following are for USG.
3505 *
3506 * On USG systems the system calls are INTERRUPTIBLE by signals
3507 * that the user program has elected to catch. Thus the system call
3508 * must be retried in these cases. To handle this without massive
3509 * changes in the source code, we remap the standard system call names
3510 * to names for our own functions in sysdep.c that do the system call
3511 * with retries. Actually, for portability reasons, it is good
3512 * programming practice, as this example shows, to limit all actual
3513 * system calls to a single occurrence in the source. Sure, this
3514 * adds an extra level of function call overhead but it is almost
3515 * always negligible. Fred Fish, Unisoft Systems Inc.
3516 */
3517
3518 /*
3519 * Warning, this function may not duplicate 4.2 action properly
3520 * under error conditions.
3521 */
3522
3523 #ifndef MAXPATHLEN
3524 /* In 4.1, param.h fails to define this. */
3525 #define MAXPATHLEN 1024
3526 #endif
3527
3528 #ifndef HAVE_GETWD
3529
3530 char *
3531 getwd (pathname)
3532 char *pathname;
3533 {
3534 char *npath, *spath;
3535 extern char *getcwd ();
3536
3537 BLOCK_INPUT; /* getcwd uses malloc */
3538 spath = npath = getcwd ((char *) 0, MAXPATHLEN);
3539 if (spath == 0)
3540 {
3541 UNBLOCK_INPUT;
3542 return spath;
3543 }
3544 /* On Altos 3068, getcwd can return @hostname/dir, so discard
3545 up to first slash. Should be harmless on other systems. */
3546 while (*npath && *npath != '/')
3547 npath++;
3548 strcpy (pathname, npath);
3549 free (spath); /* getcwd uses malloc */
3550 UNBLOCK_INPUT;
3551 return pathname;
3552 }
3553
3554 #endif /* HAVE_GETWD */
3555
3556 /*
3557 * Emulate rename using unlink/link. Note that this is
3558 * only partially correct. Also, doesn't enforce restriction
3559 * that files be of same type (regular->regular, dir->dir, etc).
3560 */
3561
3562 #ifndef HAVE_RENAME
3563
3564 rename (from, to)
3565 const char *from;
3566 const char *to;
3567 {
3568 if (access (from, 0) == 0)
3569 {
3570 unlink (to);
3571 if (link (from, to) == 0)
3572 if (unlink (from) == 0)
3573 return (0);
3574 }
3575 return (-1);
3576 }
3577
3578 #endif
3579
3580
3581 #ifdef HPUX
3582 #ifndef HAVE_PERROR
3583
3584 /* HPUX curses library references perror, but as far as we know
3585 it won't be called. Anyway this definition will do for now. */
3586
3587 perror ()
3588 {
3589 }
3590
3591 #endif /* not HAVE_PERROR */
3592 #endif /* HPUX */
3593
3594 #ifndef HAVE_DUP2
3595
3596 /*
3597 * Emulate BSD dup2. First close newd if it already exists.
3598 * Then, attempt to dup oldd. If not successful, call dup2 recursively
3599 * until we are, then close the unsuccessful ones.
3600 */
3601
3602 dup2 (oldd, newd)
3603 int oldd;
3604 int newd;
3605 {
3606 register int fd, ret;
3607
3608 emacs_close (newd);
3609
3610 #ifdef F_DUPFD
3611 return fcntl (oldd, F_DUPFD, newd);
3612 #else
3613 fd = dup (old);
3614 if (fd == -1)
3615 return -1;
3616 if (fd == new)
3617 return new;
3618 ret = dup2 (old,new);
3619 emacs_close (fd);
3620 return ret;
3621 #endif
3622 }
3623
3624 #endif /* not HAVE_DUP2 */
3625
3626 /*
3627 * Gettimeofday. Simulate as much as possible. Only accurate
3628 * to nearest second. Emacs doesn't use tzp so ignore it for now.
3629 * Only needed when subprocesses are defined.
3630 */
3631
3632 #ifdef subprocesses
3633 #ifndef VMS
3634 #ifndef HAVE_GETTIMEOFDAY
3635 #ifdef HAVE_TIMEVAL
3636
3637 /* ARGSUSED */
3638 int
3639 gettimeofday (tp, tzp)
3640 struct timeval *tp;
3641 struct timezone *tzp;
3642 {
3643 extern long time ();
3644
3645 tp->tv_sec = time ((long *)0);
3646 tp->tv_usec = 0;
3647 if (tzp != 0)
3648 tzp->tz_minuteswest = -1;
3649 return 0;
3650 }
3651
3652 #endif
3653 #endif
3654 #endif
3655 #endif /* subprocess && !HAVE_GETTIMEOFDAY && HAVE_TIMEVAL && !VMS */
3656
3657 /*
3658 * This function will go away as soon as all the stubs fixed. (fnf)
3659 */
3660
3661 void
3662 croak (badfunc)
3663 char *badfunc;
3664 {
3665 printf ("%s not yet implemented\r\n", badfunc);
3666 reset_all_sys_modes ();
3667 exit (1);
3668 }
3669
3670 #endif /* USG */
3671 \f
3672 /* Directory routines for systems that don't have them. */
3673
3674 #ifdef SYSV_SYSTEM_DIR
3675
3676 #include <dirent.h>
3677
3678 #if defined (BROKEN_CLOSEDIR) || !defined (HAVE_CLOSEDIR)
3679
3680 int
3681 closedir (dirp)
3682 register DIR *dirp; /* stream from opendir */
3683 {
3684 int rtnval;
3685
3686 rtnval = emacs_close (dirp->dd_fd);
3687
3688 /* Some systems (like Solaris) allocate the buffer and the DIR all
3689 in one block. Why in the world are we freeing this ourselves
3690 anyway? */
3691 #if ! (defined (sun) && defined (USG5_4))
3692 xfree ((char *) dirp->dd_buf); /* directory block defined in <dirent.h> */
3693 #endif
3694 xfree ((char *) dirp);
3695
3696 return rtnval;
3697 }
3698 #endif /* BROKEN_CLOSEDIR or not HAVE_CLOSEDIR */
3699 #endif /* SYSV_SYSTEM_DIR */
3700
3701 #ifdef NONSYSTEM_DIR_LIBRARY
3702
3703 DIR *
3704 opendir (filename)
3705 char *filename; /* name of directory */
3706 {
3707 register DIR *dirp; /* -> malloc'ed storage */
3708 register int fd; /* file descriptor for read */
3709 struct stat sbuf; /* result of fstat */
3710
3711 fd = emacs_open (filename, O_RDONLY, 0);
3712 if (fd < 0)
3713 return 0;
3714
3715 BLOCK_INPUT;
3716 if (fstat (fd, &sbuf) < 0
3717 || (sbuf.st_mode & S_IFMT) != S_IFDIR
3718 || (dirp = (DIR *) xmalloc (sizeof (DIR))) == 0)
3719 {
3720 emacs_close (fd);
3721 UNBLOCK_INPUT;
3722 return 0; /* bad luck today */
3723 }
3724 UNBLOCK_INPUT;
3725
3726 dirp->dd_fd = fd;
3727 dirp->dd_loc = dirp->dd_size = 0; /* refill needed */
3728
3729 return dirp;
3730 }
3731
3732 void
3733 closedir (dirp)
3734 register DIR *dirp; /* stream from opendir */
3735 {
3736 emacs_close (dirp->dd_fd);
3737 xfree ((char *) dirp);
3738 }
3739
3740
3741 #ifndef VMS
3742 #define DIRSIZ 14
3743 struct olddir
3744 {
3745 ino_t od_ino; /* inode */
3746 char od_name[DIRSIZ]; /* filename */
3747 };
3748 #endif /* not VMS */
3749
3750 struct direct dir_static; /* simulated directory contents */
3751
3752 /* ARGUSED */
3753 struct direct *
3754 readdir (dirp)
3755 register DIR *dirp; /* stream from opendir */
3756 {
3757 #ifndef VMS
3758 register struct olddir *dp; /* -> directory data */
3759 #else /* VMS */
3760 register struct dir$_name *dp; /* -> directory data */
3761 register struct dir$_version *dv; /* -> version data */
3762 #endif /* VMS */
3763
3764 for (; ;)
3765 {
3766 if (dirp->dd_loc >= dirp->dd_size)
3767 dirp->dd_loc = dirp->dd_size = 0;
3768
3769 if (dirp->dd_size == 0 /* refill buffer */
3770 && (dirp->dd_size = emacs_read (dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ)) <= 0)
3771 return 0;
3772
3773 #ifndef VMS
3774 dp = (struct olddir *) &dirp->dd_buf[dirp->dd_loc];
3775 dirp->dd_loc += sizeof (struct olddir);
3776
3777 if (dp->od_ino != 0) /* not deleted entry */
3778 {
3779 dir_static.d_ino = dp->od_ino;
3780 strncpy (dir_static.d_name, dp->od_name, DIRSIZ);
3781 dir_static.d_name[DIRSIZ] = '\0';
3782 dir_static.d_namlen = strlen (dir_static.d_name);
3783 dir_static.d_reclen = sizeof (struct direct)
3784 - MAXNAMLEN + 3
3785 + dir_static.d_namlen - dir_static.d_namlen % 4;
3786 return &dir_static; /* -> simulated structure */
3787 }
3788 #else /* VMS */
3789 dp = (struct dir$_name *) dirp->dd_buf;
3790 if (dirp->dd_loc == 0)
3791 dirp->dd_loc = (dp->dir$b_namecount&1) ? dp->dir$b_namecount + 1
3792 : dp->dir$b_namecount;
3793 dv = (struct dir$_version *)&dp->dir$t_name[dirp->dd_loc];
3794 dir_static.d_ino = dv->dir$w_fid_num;
3795 dir_static.d_namlen = dp->dir$b_namecount;
3796 dir_static.d_reclen = sizeof (struct direct)
3797 - MAXNAMLEN + 3
3798 + dir_static.d_namlen - dir_static.d_namlen % 4;
3799 strncpy (dir_static.d_name, dp->dir$t_name, dp->dir$b_namecount);
3800 dir_static.d_name[dir_static.d_namlen] = '\0';
3801 dirp->dd_loc = dirp->dd_size; /* only one record at a time */
3802 return &dir_static;
3803 #endif /* VMS */
3804 }
3805 }
3806
3807 #ifdef VMS
3808 /* readdirver is just like readdir except it returns all versions of a file
3809 as separate entries. */
3810
3811 /* ARGUSED */
3812 struct direct *
3813 readdirver (dirp)
3814 register DIR *dirp; /* stream from opendir */
3815 {
3816 register struct dir$_name *dp; /* -> directory data */
3817 register struct dir$_version *dv; /* -> version data */
3818
3819 if (dirp->dd_loc >= dirp->dd_size - sizeof (struct dir$_name))
3820 dirp->dd_loc = dirp->dd_size = 0;
3821
3822 if (dirp->dd_size == 0 /* refill buffer */
3823 && (dirp->dd_size = sys_read (dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ)) <= 0)
3824 return 0;
3825
3826 dp = (struct dir$_name *) dirp->dd_buf;
3827 if (dirp->dd_loc == 0)
3828 dirp->dd_loc = (dp->dir$b_namecount & 1) ? dp->dir$b_namecount + 1
3829 : dp->dir$b_namecount;
3830 dv = (struct dir$_version *) &dp->dir$t_name[dirp->dd_loc];
3831 strncpy (dir_static.d_name, dp->dir$t_name, dp->dir$b_namecount);
3832 sprintf (&dir_static.d_name[dp->dir$b_namecount], ";%d", dv->dir$w_version);
3833 dir_static.d_namlen = strlen (dir_static.d_name);
3834 dir_static.d_ino = dv->dir$w_fid_num;
3835 dir_static.d_reclen = sizeof (struct direct) - MAXNAMLEN + 3
3836 + dir_static.d_namlen - dir_static.d_namlen % 4;
3837 dirp->dd_loc = ((char *) (++dv) - dp->dir$t_name);
3838 return &dir_static;
3839 }
3840
3841 #endif /* VMS */
3842
3843 #endif /* NONSYSTEM_DIR_LIBRARY */
3844
3845 \f
3846 int
3847 set_file_times (filename, atime, mtime)
3848 const char *filename;
3849 EMACS_TIME atime, mtime;
3850 {
3851 #ifdef HAVE_UTIMES
3852 struct timeval tv[2];
3853 tv[0] = atime;
3854 tv[1] = mtime;
3855 return utimes (filename, tv);
3856 #else /* not HAVE_UTIMES */
3857 struct utimbuf utb;
3858 utb.actime = EMACS_SECS (atime);
3859 utb.modtime = EMACS_SECS (mtime);
3860 return utime (filename, &utb);
3861 #endif /* not HAVE_UTIMES */
3862 }
3863 \f
3864 /* mkdir and rmdir functions, for systems which don't have them. */
3865
3866 #ifndef HAVE_MKDIR
3867 /*
3868 * Written by Robert Rother, Mariah Corporation, August 1985.
3869 *
3870 * If you want it, it's yours. All I ask in return is that if you
3871 * figure out how to do this in a Bourne Shell script you send me
3872 * a copy.
3873 * sdcsvax!rmr or rmr@uscd
3874 *
3875 * Severely hacked over by John Gilmore to make a 4.2BSD compatible
3876 * subroutine. 11Mar86; hoptoad!gnu
3877 *
3878 * Modified by rmtodd@uokmax 6-28-87 -- when making an already existing dir,
3879 * subroutine didn't return EEXIST. It does now.
3880 */
3881
3882 /*
3883 * Make a directory.
3884 */
3885 #ifdef MKDIR_PROTOTYPE
3886 MKDIR_PROTOTYPE
3887 #else
3888 int
3889 mkdir (dpath, dmode)
3890 char *dpath;
3891 int dmode;
3892 #endif
3893 {
3894 int cpid, status, fd;
3895 struct stat statbuf;
3896
3897 if (stat (dpath, &statbuf) == 0)
3898 {
3899 errno = EEXIST; /* Stat worked, so it already exists */
3900 return -1;
3901 }
3902
3903 /* If stat fails for a reason other than non-existence, return error */
3904 if (errno != ENOENT)
3905 return -1;
3906
3907 synch_process_alive = 1;
3908 switch (cpid = fork ())
3909 {
3910
3911 case -1: /* Error in fork */
3912 return (-1); /* Errno is set already */
3913
3914 case 0: /* Child process */
3915 /*
3916 * Cheap hack to set mode of new directory. Since this
3917 * child process is going away anyway, we zap its umask.
3918 * FIXME, this won't suffice to set SUID, SGID, etc. on this
3919 * directory. Does anybody care?
3920 */
3921 status = umask (0); /* Get current umask */
3922 status = umask (status | (0777 & ~dmode)); /* Set for mkdir */
3923 fd = emacs_open ("/dev/null", O_RDWR, 0);
3924 if (fd >= 0)
3925 {
3926 dup2 (fd, 0);
3927 dup2 (fd, 1);
3928 dup2 (fd, 2);
3929 }
3930 execl ("/bin/mkdir", "mkdir", dpath, (char *) 0);
3931 _exit (-1); /* Can't exec /bin/mkdir */
3932
3933 default: /* Parent process */
3934 wait_for_termination (cpid);
3935 }
3936
3937 if (synch_process_death != 0 || synch_process_retcode != 0
3938 || synch_process_termsig != 0)
3939 {
3940 errno = EIO; /* We don't know why, but */
3941 return -1; /* /bin/mkdir failed */
3942 }
3943
3944 return 0;
3945 }
3946 #endif /* not HAVE_MKDIR */
3947
3948 #ifndef HAVE_RMDIR
3949 int
3950 rmdir (dpath)
3951 char *dpath;
3952 {
3953 int cpid, status, fd;
3954 struct stat statbuf;
3955
3956 if (stat (dpath, &statbuf) != 0)
3957 {
3958 /* Stat just set errno. We don't have to */
3959 return -1;
3960 }
3961
3962 synch_process_alive = 1;
3963 switch (cpid = fork ())
3964 {
3965
3966 case -1: /* Error in fork */
3967 return (-1); /* Errno is set already */
3968
3969 case 0: /* Child process */
3970 fd = emacs_open ("/dev/null", O_RDWR, 0);
3971 if (fd >= 0)
3972 {
3973 dup2 (fd, 0);
3974 dup2 (fd, 1);
3975 dup2 (fd, 2);
3976 }
3977 execl ("/bin/rmdir", "rmdir", dpath, (char *) 0);
3978 _exit (-1); /* Can't exec /bin/rmdir */
3979
3980 default: /* Parent process */
3981 wait_for_termination (cpid);
3982 }
3983
3984 if (synch_process_death != 0 || synch_process_retcode != 0
3985 || synch_process_termsig != 0)
3986 {
3987 errno = EIO; /* We don't know why, but */
3988 return -1; /* /bin/rmdir failed */
3989 }
3990
3991 return 0;
3992 }
3993 #endif /* !HAVE_RMDIR */
3994
3995
3996 \f
3997 /* Functions for VMS */
3998 #ifdef VMS
3999 #include <acldef.h>
4000 #include <chpdef.h>
4001 #include <jpidef.h>
4002
4003 /* Return as a string the VMS error string pertaining to STATUS.
4004 Reuses the same static buffer each time it is called. */
4005
4006 char *
4007 vmserrstr (status)
4008 int status; /* VMS status code */
4009 {
4010 int bufadr[2];
4011 short len;
4012 static char buf[257];
4013
4014 bufadr[0] = sizeof buf - 1;
4015 bufadr[1] = (int) buf;
4016 if (! (SYS$GETMSG (status, &len, bufadr, 0x1, 0) & 1))
4017 return "untranslatable VMS error status";
4018 buf[len] = '\0';
4019 return buf;
4020 }
4021
4022 #ifdef access
4023 #undef access
4024
4025 /* The following is necessary because 'access' emulation by VMS C (2.0) does
4026 * not work correctly. (It also doesn't work well in version 2.3.)
4027 */
4028
4029 #ifdef VMS4_4
4030
4031 #define DESCRIPTOR(name,string) struct dsc$descriptor_s name = \
4032 { strlen (string), DSC$K_DTYPE_T, DSC$K_CLASS_S, string }
4033
4034 typedef union {
4035 struct {
4036 unsigned short s_buflen;
4037 unsigned short s_code;
4038 char *s_bufadr;
4039 unsigned short *s_retlenadr;
4040 } s;
4041 int end;
4042 } item;
4043 #define buflen s.s_buflen
4044 #define code s.s_code
4045 #define bufadr s.s_bufadr
4046 #define retlenadr s.s_retlenadr
4047
4048 #define R_OK 4 /* test for read permission */
4049 #define W_OK 2 /* test for write permission */
4050 #define X_OK 1 /* test for execute (search) permission */
4051 #define F_OK 0 /* test for presence of file */
4052
4053 int
4054 sys_access (path, mode)
4055 char *path;
4056 int mode;
4057 {
4058 static char *user = NULL;
4059 char dir_fn[512];
4060
4061 /* translate possible directory spec into .DIR file name, so brain-dead
4062 * access can treat the directory like a file. */
4063 if (directory_file_name (path, dir_fn))
4064 path = dir_fn;
4065
4066 if (mode == F_OK)
4067 return access (path, mode);
4068 if (user == NULL && (user = (char *) getenv ("USER")) == NULL)
4069 return -1;
4070 {
4071 int stat;
4072 int flags;
4073 int acces;
4074 unsigned short int dummy;
4075 item itemlst[3];
4076 static int constant = ACL$C_FILE;
4077 DESCRIPTOR (path_desc, path);
4078 DESCRIPTOR (user_desc, user);
4079
4080 flags = 0;
4081 acces = 0;
4082 if ((mode & X_OK) && ((stat = access (path, mode)) < 0 || mode == X_OK))
4083 return stat;
4084 if (mode & R_OK)
4085 acces |= CHP$M_READ;
4086 if (mode & W_OK)
4087 acces |= CHP$M_WRITE;
4088 itemlst[0].buflen = sizeof (int);
4089 itemlst[0].code = CHP$_FLAGS;
4090 itemlst[0].bufadr = (char *) &flags;
4091 itemlst[0].retlenadr = &dummy;
4092 itemlst[1].buflen = sizeof (int);
4093 itemlst[1].code = CHP$_ACCESS;
4094 itemlst[1].bufadr = (char *) &acces;
4095 itemlst[1].retlenadr = &dummy;
4096 itemlst[2].end = CHP$_END;
4097 stat = SYS$CHECK_ACCESS (&constant, &path_desc, &user_desc, itemlst);
4098 return stat == SS$_NORMAL ? 0 : -1;
4099 }
4100 }
4101
4102 #else /* not VMS4_4 */
4103
4104 #include <prvdef.h>
4105 #define ACE$M_WRITE 2
4106 #define ACE$C_KEYID 1
4107
4108 static unsigned short memid, grpid;
4109 static unsigned int uic;
4110
4111 /* Called from init_sys_modes, so it happens not very often
4112 but at least each time Emacs is loaded. */
4113 void
4114 sys_access_reinit ()
4115 {
4116 uic = 0;
4117 }
4118
4119 int
4120 sys_access (filename, type)
4121 char * filename;
4122 int type;
4123 {
4124 struct FAB fab;
4125 struct XABPRO xab;
4126 int status, size, i, typecode, acl_controlled;
4127 unsigned int *aclptr, *aclend, aclbuf[60];
4128 union prvdef prvmask;
4129
4130 /* Get UIC and GRP values for protection checking. */
4131 if (uic == 0)
4132 {
4133 status = LIB$GETJPI (&JPI$_UIC, 0, 0, &uic, 0, 0);
4134 if (! (status & 1))
4135 return -1;
4136 memid = uic & 0xFFFF;
4137 grpid = uic >> 16;
4138 }
4139
4140 if (type != 2) /* not checking write access */
4141 return access (filename, type);
4142
4143 /* Check write protection. */
4144
4145 #define CHECKPRIV(bit) (prvmask.bit)
4146 #define WRITABLE(field) (! ((xab.xab$w_pro >> field) & XAB$M_NOWRITE))
4147
4148 /* Find privilege bits */
4149 status = SYS$SETPRV (0, 0, 0, prvmask);
4150 if (! (status & 1))
4151 error ("Unable to find privileges: %s", vmserrstr (status));
4152 if (CHECKPRIV (PRV$V_BYPASS))
4153 return 0; /* BYPASS enabled */
4154 fab = cc$rms_fab;
4155 fab.fab$b_fac = FAB$M_GET;
4156 fab.fab$l_fna = filename;
4157 fab.fab$b_fns = strlen (filename);
4158 fab.fab$l_xab = &xab;
4159 xab = cc$rms_xabpro;
4160 xab.xab$l_aclbuf = aclbuf;
4161 xab.xab$w_aclsiz = sizeof (aclbuf);
4162 status = SYS$OPEN (&fab, 0, 0);
4163 if (! (status & 1))
4164 return -1;
4165 SYS$CLOSE (&fab, 0, 0);
4166 /* Check system access */
4167 if (CHECKPRIV (PRV$V_SYSPRV) && WRITABLE (XAB$V_SYS))
4168 return 0;
4169 /* Check ACL entries, if any */
4170 acl_controlled = 0;
4171 if (xab.xab$w_acllen > 0)
4172 {
4173 aclptr = aclbuf;
4174 aclend = &aclbuf[xab.xab$w_acllen / 4];
4175 while (*aclptr && aclptr < aclend)
4176 {
4177 size = (*aclptr & 0xff) / 4;
4178 typecode = (*aclptr >> 8) & 0xff;
4179 if (typecode == ACE$C_KEYID)
4180 for (i = size - 1; i > 1; i--)
4181 if (aclptr[i] == uic)
4182 {
4183 acl_controlled = 1;
4184 if (aclptr[1] & ACE$M_WRITE)
4185 return 0; /* Write access through ACL */
4186 }
4187 aclptr = &aclptr[size];
4188 }
4189 if (acl_controlled) /* ACL specified, prohibits write access */
4190 return -1;
4191 }
4192 /* No ACL entries specified, check normal protection */
4193 if (WRITABLE (XAB$V_WLD)) /* World writable */
4194 return 0;
4195 if (WRITABLE (XAB$V_GRP) &&
4196 (unsigned short) (xab.xab$l_uic >> 16) == grpid)
4197 return 0; /* Group writable */
4198 if (WRITABLE (XAB$V_OWN) &&
4199 (xab.xab$l_uic & 0xFFFF) == memid)
4200 return 0; /* Owner writable */
4201
4202 return -1; /* Not writable */
4203 }
4204 #endif /* not VMS4_4 */
4205 #endif /* access */
4206
4207 static char vtbuf[NAM$C_MAXRSS+1];
4208
4209 /* translate a vms file spec to a unix path */
4210 char *
4211 sys_translate_vms (vfile)
4212 char * vfile;
4213 {
4214 char * p;
4215 char * targ;
4216
4217 if (!vfile)
4218 return 0;
4219
4220 targ = vtbuf;
4221
4222 /* leading device or logical name is a root directory */
4223 if (p = strchr (vfile, ':'))
4224 {
4225 *targ++ = '/';
4226 while (vfile < p)
4227 *targ++ = *vfile++;
4228 vfile++;
4229 *targ++ = '/';
4230 }
4231 p = vfile;
4232 if (*p == '[' || *p == '<')
4233 {
4234 while (*++vfile != *p + 2)
4235 switch (*vfile)
4236 {
4237 case '.':
4238 if (vfile[-1] == *p)
4239 *targ++ = '.';
4240 *targ++ = '/';
4241 break;
4242
4243 case '-':
4244 *targ++ = '.';
4245 *targ++ = '.';
4246 break;
4247
4248 default:
4249 *targ++ = *vfile;
4250 break;
4251 }
4252 vfile++;
4253 *targ++ = '/';
4254 }
4255 while (*vfile)
4256 *targ++ = *vfile++;
4257
4258 return vtbuf;
4259 }
4260
4261 static char utbuf[NAM$C_MAXRSS+1];
4262
4263 /* translate a unix path to a VMS file spec */
4264 char *
4265 sys_translate_unix (ufile)
4266 char * ufile;
4267 {
4268 int slash_seen = 0;
4269 char *p;
4270 char * targ;
4271
4272 if (!ufile)
4273 return 0;
4274
4275 targ = utbuf;
4276
4277 if (*ufile == '/')
4278 {
4279 ufile++;
4280 }
4281
4282 while (*ufile)
4283 {
4284 switch (*ufile)
4285 {
4286 case '/':
4287 if (slash_seen)
4288 if (index (&ufile[1], '/'))
4289 *targ++ = '.';
4290 else
4291 *targ++ = ']';
4292 else
4293 {
4294 *targ++ = ':';
4295 if (index (&ufile[1], '/'))
4296 *targ++ = '[';
4297 slash_seen = 1;
4298 }
4299 break;
4300
4301 case '.':
4302 if (strncmp (ufile, "./", 2) == 0)
4303 {
4304 if (!slash_seen)
4305 {
4306 *targ++ = '[';
4307 slash_seen = 1;
4308 }
4309 ufile++; /* skip the dot */
4310 if (index (&ufile[1], '/'))
4311 *targ++ = '.';
4312 else
4313 *targ++ = ']';
4314 }
4315 else if (strncmp (ufile, "../", 3) == 0)
4316 {
4317 if (!slash_seen)
4318 {
4319 *targ++ = '[';
4320 slash_seen = 1;
4321 }
4322 *targ++ = '-';
4323 ufile += 2; /* skip the dots */
4324 if (index (&ufile[1], '/'))
4325 *targ++ = '.';
4326 else
4327 *targ++ = ']';
4328 }
4329 else
4330 *targ++ = *ufile;
4331 break;
4332
4333 default:
4334 *targ++ = *ufile;
4335 break;
4336 }
4337 ufile++;
4338 }
4339 *targ = '\0';
4340
4341 return utbuf;
4342 }
4343
4344 char *
4345 getwd (pathname)
4346 char *pathname;
4347 {
4348 char *ptr, *val;
4349 extern char *getcwd ();
4350
4351 #define MAXPATHLEN 1024
4352
4353 ptr = xmalloc (MAXPATHLEN);
4354 val = getcwd (ptr, MAXPATHLEN);
4355 if (val == 0)
4356 {
4357 xfree (ptr);
4358 return val;
4359 }
4360 strcpy (pathname, ptr);
4361 xfree (ptr);
4362
4363 return pathname;
4364 }
4365
4366 int
4367 getppid ()
4368 {
4369 long item_code = JPI$_OWNER;
4370 unsigned long parent_id;
4371 int status;
4372
4373 if (((status = LIB$GETJPI (&item_code, 0, 0, &parent_id)) & 1) == 0)
4374 {
4375 errno = EVMSERR;
4376 vaxc$errno = status;
4377 return -1;
4378 }
4379 return parent_id;
4380 }
4381
4382 #undef getuid
4383 unsigned
4384 sys_getuid ()
4385 {
4386 return (getgid () << 16) | getuid ();
4387 }
4388
4389 #undef read
4390 int
4391 sys_read (fildes, buf, nbyte)
4392 int fildes;
4393 char *buf;
4394 unsigned int nbyte;
4395 {
4396 return read (fildes, buf, (nbyte < MAXIOSIZE ? nbyte : MAXIOSIZE));
4397 }
4398
4399 #if 0
4400 int
4401 sys_write (fildes, buf, nbyte)
4402 int fildes;
4403 char *buf;
4404 unsigned int nbyte;
4405 {
4406 register int nwrote, rtnval = 0;
4407
4408 while (nbyte > MAXIOSIZE && (nwrote = write (fildes, buf, MAXIOSIZE)) > 0) {
4409 nbyte -= nwrote;
4410 buf += nwrote;
4411 rtnval += nwrote;
4412 }
4413 if (nwrote < 0)
4414 return rtnval ? rtnval : -1;
4415 if ((nwrote = write (fildes, buf, nbyte)) < 0)
4416 return rtnval ? rtnval : -1;
4417 return (rtnval + nwrote);
4418 }
4419 #endif /* 0 */
4420
4421 /*
4422 * VAX/VMS VAX C RTL really loses. It insists that records
4423 * end with a newline (carriage return) character, and if they
4424 * don't it adds one (nice of it isn't it!)
4425 *
4426 * Thus we do this stupidity below.
4427 */
4428
4429 #undef write
4430 int
4431 sys_write (fildes, buf, nbytes)
4432 int fildes;
4433 char *buf;
4434 unsigned int nbytes;
4435 {
4436 register char *p;
4437 register char *e;
4438 int sum = 0;
4439 struct stat st;
4440
4441 fstat (fildes, &st);
4442 p = buf;
4443 while (nbytes > 0)
4444 {
4445 int len, retval;
4446
4447 /* Handle fixed-length files with carriage control. */
4448 if (st.st_fab_rfm == FAB$C_FIX
4449 && ((st.st_fab_rat & (FAB$M_FTN | FAB$M_CR)) != 0))
4450 {
4451 len = st.st_fab_mrs;
4452 retval = write (fildes, p, min (len, nbytes));
4453 if (retval != len)
4454 return -1;
4455 retval++; /* This skips the implied carriage control */
4456 }
4457 else
4458 {
4459 e = p + min (MAXIOSIZE, nbytes) - 1;
4460 while (*e != '\n' && e > p) e--;
4461 if (p == e) /* Ok.. so here we add a newline... sigh. */
4462 e = p + min (MAXIOSIZE, nbytes) - 1;
4463 len = e + 1 - p;
4464 retval = write (fildes, p, len);
4465 if (retval != len)
4466 return -1;
4467 }
4468 p += retval;
4469 sum += retval;
4470 nbytes -= retval;
4471 }
4472 return sum;
4473 }
4474
4475 /* Create file NEW copying its attributes from file OLD. If
4476 OLD is 0 or does not exist, create based on the value of
4477 vms_stmlf_recfm. */
4478
4479 /* Protection value the file should ultimately have.
4480 Set by create_copy_attrs, and use by rename_sansversions. */
4481 static unsigned short int fab_final_pro;
4482
4483 int
4484 creat_copy_attrs (old, new)
4485 char *old, *new;
4486 {
4487 struct FAB fab = cc$rms_fab;
4488 struct XABPRO xabpro;
4489 char aclbuf[256]; /* Choice of size is arbitrary. See below. */
4490 extern int vms_stmlf_recfm;
4491
4492 if (old)
4493 {
4494 fab.fab$b_fac = FAB$M_GET;
4495 fab.fab$l_fna = old;
4496 fab.fab$b_fns = strlen (old);
4497 fab.fab$l_xab = (char *) &xabpro;
4498 xabpro = cc$rms_xabpro;
4499 xabpro.xab$l_aclbuf = aclbuf;
4500 xabpro.xab$w_aclsiz = sizeof aclbuf;
4501 /* Call $OPEN to fill in the fab & xabpro fields. */
4502 if (SYS$OPEN (&fab, 0, 0) & 1)
4503 {
4504 SYS$CLOSE (&fab, 0, 0);
4505 fab.fab$l_alq = 0; /* zero the allocation quantity */
4506 if (xabpro.xab$w_acllen > 0)
4507 {
4508 if (xabpro.xab$w_acllen > sizeof aclbuf)
4509 /* If the acl buffer was too short, redo open with longer one.
4510 Wouldn't need to do this if there were some system imposed
4511 limit on the size of an ACL, but I can't find any such. */
4512 {
4513 xabpro.xab$l_aclbuf = (char *) alloca (xabpro.xab$w_acllen);
4514 xabpro.xab$w_aclsiz = xabpro.xab$w_acllen;
4515 if (SYS$OPEN (&fab, 0, 0) & 1)
4516 SYS$CLOSE (&fab, 0, 0);
4517 else
4518 old = 0;
4519 }
4520 }
4521 else
4522 xabpro.xab$l_aclbuf = 0;
4523 }
4524 else
4525 old = 0;
4526 }
4527 fab.fab$l_fna = new;
4528 fab.fab$b_fns = strlen (new);
4529 if (!old)
4530 {
4531 fab.fab$l_xab = 0;
4532 fab.fab$b_rfm = vms_stmlf_recfm ? FAB$C_STMLF : FAB$C_VAR;
4533 fab.fab$b_rat = FAB$M_CR;
4534 }
4535
4536 /* Set the file protections such that we will be able to manipulate
4537 this file. Once we are done writing and renaming it, we will set
4538 the protections back. */
4539 if (old)
4540 fab_final_pro = xabpro.xab$w_pro;
4541 else
4542 SYS$SETDFPROT (0, &fab_final_pro);
4543 xabpro.xab$w_pro &= 0xff0f; /* set O:rewd for now. This is set back later. */
4544
4545 /* Create the new file with either default attrs or attrs copied
4546 from old file. */
4547 if (!(SYS$CREATE (&fab, 0, 0) & 1))
4548 return -1;
4549 SYS$CLOSE (&fab, 0, 0);
4550 /* As this is a "replacement" for creat, return a file descriptor
4551 opened for writing. */
4552 return open (new, O_WRONLY);
4553 }
4554
4555 #ifdef creat
4556 #undef creat
4557 #include <varargs.h>
4558 #ifdef __GNUC__
4559 #ifndef va_count
4560 #define va_count(X) ((X) = *(((int *) &(va_alist)) - 1))
4561 #endif
4562 #endif
4563
4564 int
4565 sys_creat (va_alist)
4566 va_dcl
4567 {
4568 va_list list_incrementer;
4569 char *name;
4570 int mode;
4571 int rfd; /* related file descriptor */
4572 int fd; /* Our new file descriptor */
4573 int count;
4574 struct stat st_buf;
4575 char rfm[12];
4576 char rat[15];
4577 char mrs[13];
4578 char fsz[13];
4579 extern int vms_stmlf_recfm;
4580
4581 va_count (count);
4582 va_start (list_incrementer);
4583 name = va_arg (list_incrementer, char *);
4584 mode = va_arg (list_incrementer, int);
4585 if (count > 2)
4586 rfd = va_arg (list_incrementer, int);
4587 va_end (list_incrementer);
4588 if (count > 2)
4589 {
4590 /* Use information from the related file descriptor to set record
4591 format of the newly created file. */
4592 fstat (rfd, &st_buf);
4593 switch (st_buf.st_fab_rfm)
4594 {
4595 case FAB$C_FIX:
4596 strcpy (rfm, "rfm = fix");
4597 sprintf (mrs, "mrs = %d", st_buf.st_fab_mrs);
4598 strcpy (rat, "rat = ");
4599 if (st_buf.st_fab_rat & FAB$M_CR)
4600 strcat (rat, "cr");
4601 else if (st_buf.st_fab_rat & FAB$M_FTN)
4602 strcat (rat, "ftn");
4603 else if (st_buf.st_fab_rat & FAB$M_PRN)
4604 strcat (rat, "prn");
4605 if (st_buf.st_fab_rat & FAB$M_BLK)
4606 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4607 strcat (rat, ", blk");
4608 else
4609 strcat (rat, "blk");
4610 return creat (name, 0, rfm, rat, mrs);
4611
4612 case FAB$C_VFC:
4613 strcpy (rfm, "rfm = vfc");
4614 sprintf (fsz, "fsz = %d", st_buf.st_fab_fsz);
4615 strcpy (rat, "rat = ");
4616 if (st_buf.st_fab_rat & FAB$M_CR)
4617 strcat (rat, "cr");
4618 else if (st_buf.st_fab_rat & FAB$M_FTN)
4619 strcat (rat, "ftn");
4620 else if (st_buf.st_fab_rat & FAB$M_PRN)
4621 strcat (rat, "prn");
4622 if (st_buf.st_fab_rat & FAB$M_BLK)
4623 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4624 strcat (rat, ", blk");
4625 else
4626 strcat (rat, "blk");
4627 return creat (name, 0, rfm, rat, fsz);
4628
4629 case FAB$C_STM:
4630 strcpy (rfm, "rfm = stm");
4631 break;
4632
4633 case FAB$C_STMCR:
4634 strcpy (rfm, "rfm = stmcr");
4635 break;
4636
4637 case FAB$C_STMLF:
4638 strcpy (rfm, "rfm = stmlf");
4639 break;
4640
4641 case FAB$C_UDF:
4642 strcpy (rfm, "rfm = udf");
4643 break;
4644
4645 case FAB$C_VAR:
4646 strcpy (rfm, "rfm = var");
4647 break;
4648 }
4649 strcpy (rat, "rat = ");
4650 if (st_buf.st_fab_rat & FAB$M_CR)
4651 strcat (rat, "cr");
4652 else if (st_buf.st_fab_rat & FAB$M_FTN)
4653 strcat (rat, "ftn");
4654 else if (st_buf.st_fab_rat & FAB$M_PRN)
4655 strcat (rat, "prn");
4656 if (st_buf.st_fab_rat & FAB$M_BLK)
4657 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4658 strcat (rat, ", blk");
4659 else
4660 strcat (rat, "blk");
4661 }
4662 else
4663 {
4664 strcpy (rfm, vms_stmlf_recfm ? "rfm = stmlf" : "rfm=var");
4665 strcpy (rat, "rat=cr");
4666 }
4667 /* Until the VAX C RTL fixes the many bugs with modes, always use
4668 mode 0 to get the user's default protection. */
4669 fd = creat (name, 0, rfm, rat);
4670 if (fd < 0 && errno == EEXIST)
4671 {
4672 if (unlink (name) < 0)
4673 report_file_error ("delete", build_string (name));
4674 fd = creat (name, 0, rfm, rat);
4675 }
4676 return fd;
4677 }
4678 #endif /* creat */
4679
4680 /* fwrite to stdout is S L O W. Speed it up by using fputc...*/
4681 int
4682 sys_fwrite (ptr, size, num, fp)
4683 register char * ptr;
4684 FILE * fp;
4685 {
4686 register int tot = num * size;
4687
4688 while (tot--)
4689 fputc (*ptr++, fp);
4690 return num;
4691 }
4692
4693 /*
4694 * The VMS C library routine creat actually creates a new version of an
4695 * existing file rather than truncating the old version. There are times
4696 * when this is not the desired behavior, for instance, when writing an
4697 * auto save file (you only want one version), or when you don't have
4698 * write permission in the directory containing the file (but the file
4699 * itself is writable). Hence this routine, which is equivalent to
4700 * "close (creat (fn, 0));" on Unix if fn already exists.
4701 */
4702 int
4703 vms_truncate (fn)
4704 char *fn;
4705 {
4706 struct FAB xfab = cc$rms_fab;
4707 struct RAB xrab = cc$rms_rab;
4708 int status;
4709
4710 xfab.fab$l_fop = FAB$M_TEF; /* free allocated but unused blocks on close */
4711 xfab.fab$b_fac = FAB$M_TRN | FAB$M_GET; /* allow truncate and get access */
4712 xfab.fab$b_shr = FAB$M_NIL; /* allow no sharing - file must be locked */
4713 xfab.fab$l_fna = fn;
4714 xfab.fab$b_fns = strlen (fn);
4715 xfab.fab$l_dna = ";0"; /* default to latest version of the file */
4716 xfab.fab$b_dns = 2;
4717 xrab.rab$l_fab = &xfab;
4718
4719 /* This gibberish opens the file, positions to the first record, and
4720 deletes all records from there until the end of file. */
4721 if ((SYS$OPEN (&xfab) & 01) == 01)
4722 {
4723 if ((SYS$CONNECT (&xrab) & 01) == 01 &&
4724 (SYS$FIND (&xrab) & 01) == 01 &&
4725 (SYS$TRUNCATE (&xrab) & 01) == 01)
4726 status = 0;
4727 else
4728 status = -1;
4729 }
4730 else
4731 status = -1;
4732 SYS$CLOSE (&xfab);
4733 return status;
4734 }
4735
4736 /* Define this symbol to actually read SYSUAF.DAT. This requires either
4737 SYSPRV or a readable SYSUAF.DAT. */
4738
4739 #ifdef READ_SYSUAF
4740 /*
4741 * getuaf.c
4742 *
4743 * Routine to read the VMS User Authorization File and return
4744 * a specific user's record.
4745 */
4746
4747 static struct UAF retuaf;
4748
4749 struct UAF *
4750 get_uaf_name (uname)
4751 char * uname;
4752 {
4753 register status;
4754 struct FAB uaf_fab;
4755 struct RAB uaf_rab;
4756
4757 uaf_fab = cc$rms_fab;
4758 uaf_rab = cc$rms_rab;
4759 /* initialize fab fields */
4760 uaf_fab.fab$l_fna = "SYS$SYSTEM:SYSUAF.DAT";
4761 uaf_fab.fab$b_fns = 21;
4762 uaf_fab.fab$b_fac = FAB$M_GET;
4763 uaf_fab.fab$b_org = FAB$C_IDX;
4764 uaf_fab.fab$b_shr = FAB$M_GET|FAB$M_PUT|FAB$M_UPD|FAB$M_DEL;
4765 /* initialize rab fields */
4766 uaf_rab.rab$l_fab = &uaf_fab;
4767 /* open the User Authorization File */
4768 status = SYS$OPEN (&uaf_fab);
4769 if (!(status&1))
4770 {
4771 errno = EVMSERR;
4772 vaxc$errno = status;
4773 return 0;
4774 }
4775 status = SYS$CONNECT (&uaf_rab);
4776 if (!(status&1))
4777 {
4778 errno = EVMSERR;
4779 vaxc$errno = status;
4780 return 0;
4781 }
4782 /* read the requested record - index is in uname */
4783 uaf_rab.rab$l_kbf = uname;
4784 uaf_rab.rab$b_ksz = strlen (uname);
4785 uaf_rab.rab$b_rac = RAB$C_KEY;
4786 uaf_rab.rab$l_ubf = (char *)&retuaf;
4787 uaf_rab.rab$w_usz = sizeof retuaf;
4788 status = SYS$GET (&uaf_rab);
4789 if (!(status&1))
4790 {
4791 errno = EVMSERR;
4792 vaxc$errno = status;
4793 return 0;
4794 }
4795 /* close the User Authorization File */
4796 status = SYS$DISCONNECT (&uaf_rab);
4797 if (!(status&1))
4798 {
4799 errno = EVMSERR;
4800 vaxc$errno = status;
4801 return 0;
4802 }
4803 status = SYS$CLOSE (&uaf_fab);
4804 if (!(status&1))
4805 {
4806 errno = EVMSERR;
4807 vaxc$errno = status;
4808 return 0;
4809 }
4810 return &retuaf;
4811 }
4812
4813 struct UAF *
4814 get_uaf_uic (uic)
4815 unsigned long uic;
4816 {
4817 register status;
4818 struct FAB uaf_fab;
4819 struct RAB uaf_rab;
4820
4821 uaf_fab = cc$rms_fab;
4822 uaf_rab = cc$rms_rab;
4823 /* initialize fab fields */
4824 uaf_fab.fab$l_fna = "SYS$SYSTEM:SYSUAF.DAT";
4825 uaf_fab.fab$b_fns = 21;
4826 uaf_fab.fab$b_fac = FAB$M_GET;
4827 uaf_fab.fab$b_org = FAB$C_IDX;
4828 uaf_fab.fab$b_shr = FAB$M_GET|FAB$M_PUT|FAB$M_UPD|FAB$M_DEL;
4829 /* initialize rab fields */
4830 uaf_rab.rab$l_fab = &uaf_fab;
4831 /* open the User Authorization File */
4832 status = SYS$OPEN (&uaf_fab);
4833 if (!(status&1))
4834 {
4835 errno = EVMSERR;
4836 vaxc$errno = status;
4837 return 0;
4838 }
4839 status = SYS$CONNECT (&uaf_rab);
4840 if (!(status&1))
4841 {
4842 errno = EVMSERR;
4843 vaxc$errno = status;
4844 return 0;
4845 }
4846 /* read the requested record - index is in uic */
4847 uaf_rab.rab$b_krf = 1; /* 1st alternate key */
4848 uaf_rab.rab$l_kbf = (char *) &uic;
4849 uaf_rab.rab$b_ksz = sizeof uic;
4850 uaf_rab.rab$b_rac = RAB$C_KEY;
4851 uaf_rab.rab$l_ubf = (char *)&retuaf;
4852 uaf_rab.rab$w_usz = sizeof retuaf;
4853 status = SYS$GET (&uaf_rab);
4854 if (!(status&1))
4855 {
4856 errno = EVMSERR;
4857 vaxc$errno = status;
4858 return 0;
4859 }
4860 /* close the User Authorization File */
4861 status = SYS$DISCONNECT (&uaf_rab);
4862 if (!(status&1))
4863 {
4864 errno = EVMSERR;
4865 vaxc$errno = status;
4866 return 0;
4867 }
4868 status = SYS$CLOSE (&uaf_fab);
4869 if (!(status&1))
4870 {
4871 errno = EVMSERR;
4872 vaxc$errno = status;
4873 return 0;
4874 }
4875 return &retuaf;
4876 }
4877
4878 static struct passwd retpw;
4879
4880 struct passwd *
4881 cnv_uaf_pw (up)
4882 struct UAF * up;
4883 {
4884 char * ptr;
4885
4886 /* copy these out first because if the username is 32 chars, the next
4887 section will overwrite the first byte of the UIC */
4888 retpw.pw_uid = up->uaf$w_mem;
4889 retpw.pw_gid = up->uaf$w_grp;
4890
4891 /* I suppose this is not the best style, to possibly overwrite one
4892 byte beyond the end of the field, but what the heck... */
4893 ptr = &up->uaf$t_username[UAF$S_USERNAME];
4894 while (ptr[-1] == ' ')
4895 ptr--;
4896 *ptr = '\0';
4897 strcpy (retpw.pw_name, up->uaf$t_username);
4898
4899 /* the rest of these are counted ascii strings */
4900 strncpy (retpw.pw_gecos, &up->uaf$t_owner[1], up->uaf$t_owner[0]);
4901 retpw.pw_gecos[up->uaf$t_owner[0]] = '\0';
4902 strncpy (retpw.pw_dir, &up->uaf$t_defdev[1], up->uaf$t_defdev[0]);
4903 retpw.pw_dir[up->uaf$t_defdev[0]] = '\0';
4904 strncat (retpw.pw_dir, &up->uaf$t_defdir[1], up->uaf$t_defdir[0]);
4905 retpw.pw_dir[up->uaf$t_defdev[0] + up->uaf$t_defdir[0]] = '\0';
4906 strncpy (retpw.pw_shell, &up->uaf$t_defcli[1], up->uaf$t_defcli[0]);
4907 retpw.pw_shell[up->uaf$t_defcli[0]] = '\0';
4908
4909 return &retpw;
4910 }
4911 #else /* not READ_SYSUAF */
4912 static struct passwd retpw;
4913 #endif /* not READ_SYSUAF */
4914
4915 struct passwd *
4916 getpwnam (name)
4917 char * name;
4918 {
4919 #ifdef READ_SYSUAF
4920 struct UAF *up;
4921 #else
4922 char * user;
4923 char * dir;
4924 unsigned char * full;
4925 #endif /* READ_SYSUAF */
4926 char *ptr = name;
4927
4928 while (*ptr)
4929 {
4930 if ('a' <= *ptr && *ptr <= 'z')
4931 *ptr -= 040;
4932 ptr++;
4933 }
4934 #ifdef READ_SYSUAF
4935 if (!(up = get_uaf_name (name)))
4936 return 0;
4937 return cnv_uaf_pw (up);
4938 #else
4939 if (strcmp (name, getenv ("USER")) == 0)
4940 {
4941 retpw.pw_uid = getuid ();
4942 retpw.pw_gid = getgid ();
4943 strcpy (retpw.pw_name, name);
4944 if (full = egetenv ("FULLNAME"))
4945 strcpy (retpw.pw_gecos, full);
4946 else
4947 *retpw.pw_gecos = '\0';
4948 strcpy (retpw.pw_dir, egetenv ("HOME"));
4949 *retpw.pw_shell = '\0';
4950 return &retpw;
4951 }
4952 else
4953 return 0;
4954 #endif /* not READ_SYSUAF */
4955 }
4956
4957 struct passwd *
4958 getpwuid (uid)
4959 unsigned long uid;
4960 {
4961 #ifdef READ_SYSUAF
4962 struct UAF * up;
4963
4964 if (!(up = get_uaf_uic (uid)))
4965 return 0;
4966 return cnv_uaf_pw (up);
4967 #else
4968 if (uid == sys_getuid ())
4969 return getpwnam (egetenv ("USER"));
4970 else
4971 return 0;
4972 #endif /* not READ_SYSUAF */
4973 }
4974
4975 /* return total address space available to the current process. This is
4976 the sum of the current p0 size, p1 size and free page table entries
4977 available. */
4978 int
4979 vlimit ()
4980 {
4981 int item_code;
4982 unsigned long free_pages;
4983 unsigned long frep0va;
4984 unsigned long frep1va;
4985 register status;
4986
4987 item_code = JPI$_FREPTECNT;
4988 if (((status = LIB$GETJPI (&item_code, 0, 0, &free_pages)) & 1) == 0)
4989 {
4990 errno = EVMSERR;
4991 vaxc$errno = status;
4992 return -1;
4993 }
4994 free_pages *= 512;
4995
4996 item_code = JPI$_FREP0VA;
4997 if (((status = LIB$GETJPI (&item_code, 0, 0, &frep0va)) & 1) == 0)
4998 {
4999 errno = EVMSERR;
5000 vaxc$errno = status;
5001 return -1;
5002 }
5003 item_code = JPI$_FREP1VA;
5004 if (((status = LIB$GETJPI (&item_code, 0, 0, &frep1va)) & 1) == 0)
5005 {
5006 errno = EVMSERR;
5007 vaxc$errno = status;
5008 return -1;
5009 }
5010
5011 return free_pages + frep0va + (0x7fffffff - frep1va);
5012 }
5013
5014 int
5015 define_logical_name (varname, string)
5016 char *varname;
5017 char *string;
5018 {
5019 struct dsc$descriptor_s strdsc =
5020 {strlen (string), DSC$K_DTYPE_T, DSC$K_CLASS_S, string};
5021 struct dsc$descriptor_s envdsc =
5022 {strlen (varname), DSC$K_DTYPE_T, DSC$K_CLASS_S, varname};
5023 struct dsc$descriptor_s lnmdsc =
5024 {7, DSC$K_DTYPE_T, DSC$K_CLASS_S, "LNM$JOB"};
5025
5026 return LIB$SET_LOGICAL (&envdsc, &strdsc, &lnmdsc, 0, 0);
5027 }
5028
5029 int
5030 delete_logical_name (varname)
5031 char *varname;
5032 {
5033 struct dsc$descriptor_s envdsc =
5034 {strlen (varname), DSC$K_DTYPE_T, DSC$K_CLASS_S, varname};
5035 struct dsc$descriptor_s lnmdsc =
5036 {7, DSC$K_DTYPE_T, DSC$K_CLASS_S, "LNM$JOB"};
5037
5038 return LIB$DELETE_LOGICAL (&envdsc, &lnmdsc);
5039 }
5040
5041 int
5042 ulimit ()
5043 {
5044 return 0;
5045 }
5046
5047 int
5048 setpgrp ()
5049 {
5050 return 0;
5051 }
5052
5053 int
5054 execvp ()
5055 {
5056 error ("execvp system call not implemented");
5057 return -1;
5058 }
5059
5060 int
5061 rename (from, to)
5062 char *from, *to;
5063 {
5064 int status;
5065 struct FAB from_fab = cc$rms_fab, to_fab = cc$rms_fab;
5066 struct NAM from_nam = cc$rms_nam, to_nam = cc$rms_nam;
5067 char from_esn[NAM$C_MAXRSS];
5068 char to_esn[NAM$C_MAXRSS];
5069
5070 from_fab.fab$l_fna = from;
5071 from_fab.fab$b_fns = strlen (from);
5072 from_fab.fab$l_nam = &from_nam;
5073 from_fab.fab$l_fop = FAB$M_NAM;
5074
5075 from_nam.nam$l_esa = from_esn;
5076 from_nam.nam$b_ess = sizeof from_esn;
5077
5078 to_fab.fab$l_fna = to;
5079 to_fab.fab$b_fns = strlen (to);
5080 to_fab.fab$l_nam = &to_nam;
5081 to_fab.fab$l_fop = FAB$M_NAM;
5082
5083 to_nam.nam$l_esa = to_esn;
5084 to_nam.nam$b_ess = sizeof to_esn;
5085
5086 status = SYS$RENAME (&from_fab, 0, 0, &to_fab);
5087
5088 if (status & 1)
5089 return 0;
5090 else
5091 {
5092 if (status == RMS$_DEV)
5093 errno = EXDEV;
5094 else
5095 errno = EVMSERR;
5096 vaxc$errno = status;
5097 return -1;
5098 }
5099 }
5100
5101 /* This function renames a file like `rename', but it strips
5102 the version number from the "to" filename, such that the "to" file is
5103 will always be a new version. It also sets the file protection once it is
5104 finished. The protection that we will use is stored in fab_final_pro,
5105 and was set when we did a creat_copy_attrs to create the file that we
5106 are renaming.
5107
5108 We could use the chmod function, but Eunichs uses 3 bits per user category
5109 to describe the protection, and VMS uses 4 (write and delete are separate
5110 bits). To maintain portability, the VMS implementation of `chmod' wires
5111 the W and D bits together. */
5112
5113
5114 static struct fibdef fib; /* We need this initialized to zero */
5115 char vms_file_written[NAM$C_MAXRSS];
5116
5117 int
5118 rename_sans_version (from,to)
5119 char *from, *to;
5120 {
5121 short int chan;
5122 int stat;
5123 short int iosb[4];
5124 int status;
5125 struct FAB to_fab = cc$rms_fab;
5126 struct NAM to_nam = cc$rms_nam;
5127 struct dsc$descriptor fib_d ={sizeof (fib),0,0,(char*) &fib};
5128 struct dsc$descriptor fib_attr[2]
5129 = {{sizeof (fab_final_pro),ATR$C_FPRO,0,(char*) &fab_final_pro},{0,0,0,0}};
5130 char to_esn[NAM$C_MAXRSS];
5131
5132 $DESCRIPTOR (disk,to_esn);
5133
5134 to_fab.fab$l_fna = to;
5135 to_fab.fab$b_fns = strlen (to);
5136 to_fab.fab$l_nam = &to_nam;
5137 to_fab.fab$l_fop = FAB$M_NAM;
5138
5139 to_nam.nam$l_esa = to_esn;
5140 to_nam.nam$b_ess = sizeof to_esn;
5141
5142 status = SYS$PARSE (&to_fab, 0, 0); /* figure out the full file name */
5143
5144 if (to_nam.nam$l_fnb && NAM$M_EXP_VER)
5145 *(to_nam.nam$l_ver) = '\0';
5146
5147 stat = rename (from, to_esn);
5148 if (stat < 0)
5149 return stat;
5150
5151 strcpy (vms_file_written, to_esn);
5152
5153 to_fab.fab$l_fna = vms_file_written; /* this points to the versionless name */
5154 to_fab.fab$b_fns = strlen (vms_file_written);
5155
5156 /* Now set the file protection to the correct value */
5157 SYS$OPEN (&to_fab, 0, 0); /* This fills in the nam$w_fid fields */
5158
5159 /* Copy these fields into the fib */
5160 fib.fib$r_fid_overlay.fib$w_fid[0] = to_nam.nam$w_fid[0];
5161 fib.fib$r_fid_overlay.fib$w_fid[1] = to_nam.nam$w_fid[1];
5162 fib.fib$r_fid_overlay.fib$w_fid[2] = to_nam.nam$w_fid[2];
5163
5164 SYS$CLOSE (&to_fab, 0, 0);
5165
5166 stat = SYS$ASSIGN (&disk, &chan, 0, 0); /* open a channel to the disk */
5167 if (!stat)
5168 LIB$SIGNAL (stat);
5169 stat = SYS$QIOW (0, chan, IO$_MODIFY, iosb, 0, 0, &fib_d,
5170 0, 0, 0, &fib_attr, 0);
5171 if (!stat)
5172 LIB$SIGNAL (stat);
5173 stat = SYS$DASSGN (chan);
5174 if (!stat)
5175 LIB$SIGNAL (stat);
5176 strcpy (vms_file_written, to_esn); /* We will write this to the terminal*/
5177 return 0;
5178 }
5179
5180 int
5181 link (file, new)
5182 char * file, * new;
5183 {
5184 register status;
5185 struct FAB fab;
5186 struct NAM nam;
5187 unsigned short fid[3];
5188 char esa[NAM$C_MAXRSS];
5189
5190 fab = cc$rms_fab;
5191 fab.fab$l_fop = FAB$M_OFP;
5192 fab.fab$l_fna = file;
5193 fab.fab$b_fns = strlen (file);
5194 fab.fab$l_nam = &nam;
5195
5196 nam = cc$rms_nam;
5197 nam.nam$l_esa = esa;
5198 nam.nam$b_ess = NAM$C_MAXRSS;
5199
5200 status = SYS$PARSE (&fab);
5201 if ((status & 1) == 0)
5202 {
5203 errno = EVMSERR;
5204 vaxc$errno = status;
5205 return -1;
5206 }
5207 status = SYS$SEARCH (&fab);
5208 if ((status & 1) == 0)
5209 {
5210 errno = EVMSERR;
5211 vaxc$errno = status;
5212 return -1;
5213 }
5214
5215 fid[0] = nam.nam$w_fid[0];
5216 fid[1] = nam.nam$w_fid[1];
5217 fid[2] = nam.nam$w_fid[2];
5218
5219 fab.fab$l_fna = new;
5220 fab.fab$b_fns = strlen (new);
5221
5222 status = SYS$PARSE (&fab);
5223 if ((status & 1) == 0)
5224 {
5225 errno = EVMSERR;
5226 vaxc$errno = status;
5227 return -1;
5228 }
5229
5230 nam.nam$w_fid[0] = fid[0];
5231 nam.nam$w_fid[1] = fid[1];
5232 nam.nam$w_fid[2] = fid[2];
5233
5234 nam.nam$l_esa = nam.nam$l_name;
5235 nam.nam$b_esl = nam.nam$b_name + nam.nam$b_type + nam.nam$b_ver;
5236
5237 status = SYS$ENTER (&fab);
5238 if ((status & 1) == 0)
5239 {
5240 errno = EVMSERR;
5241 vaxc$errno = status;
5242 return -1;
5243 }
5244
5245 return 0;
5246 }
5247
5248 void
5249 croak (badfunc)
5250 char *badfunc;
5251 {
5252 printf ("%s not yet implemented\r\n", badfunc);
5253 reset_all_sys_modes ();
5254 exit (1);
5255 }
5256
5257 long
5258 random ()
5259 {
5260 /* Arrange to return a range centered on zero. */
5261 return rand () - (1 << 30);
5262 }
5263
5264 void
5265 srandom (seed)
5266 {
5267 srand (seed);
5268 }
5269 #endif /* VMS */
5270 \f
5271 #ifdef AIXHFT
5272
5273 /* Called from init_sys_modes. */
5274 void
5275 hft_init (struct tty_display_info *tty_out)
5276 {
5277 int junk;
5278
5279 /* If we're not on an HFT we shouldn't do any of this. We determine
5280 if we are on an HFT by trying to get an HFT error code. If this
5281 call fails, we're not on an HFT. */
5282 #ifdef IBMR2AIX
5283 if (ioctl (0, HFQERROR, &junk) < 0)
5284 return;
5285 #else /* not IBMR2AIX */
5286 if (ioctl (0, HFQEIO, 0) < 0)
5287 return;
5288 #endif /* not IBMR2AIX */
5289
5290 /* On AIX the default hft keyboard mapping uses backspace rather than delete
5291 as the rubout key's ASCII code. Here this is changed. The bug is that
5292 there's no way to determine the old mapping, so in reset_sys_modes
5293 we need to assume that the normal map had been present. Of course, this
5294 code also doesn't help if on a terminal emulator which doesn't understand
5295 HFT VTD's. */
5296 {
5297 struct hfbuf buf;
5298 struct hfkeymap keymap;
5299
5300 buf.hf_bufp = (char *)&keymap;
5301 buf.hf_buflen = sizeof (keymap);
5302 keymap.hf_nkeys = 2;
5303 keymap.hfkey[0].hf_kpos = 15;
5304 keymap.hfkey[0].hf_kstate = HFMAPCHAR | HFSHFNONE;
5305 #ifdef IBMR2AIX
5306 keymap.hfkey[0].hf_keyidh = '<';
5307 #else /* not IBMR2AIX */
5308 keymap.hfkey[0].hf_page = '<';
5309 #endif /* not IBMR2AIX */
5310 keymap.hfkey[0].hf_char = 127;
5311 keymap.hfkey[1].hf_kpos = 15;
5312 keymap.hfkey[1].hf_kstate = HFMAPCHAR | HFSHFSHFT;
5313 #ifdef IBMR2AIX
5314 keymap.hfkey[1].hf_keyidh = '<';
5315 #else /* not IBMR2AIX */
5316 keymap.hfkey[1].hf_page = '<';
5317 #endif /* not IBMR2AIX */
5318 keymap.hfkey[1].hf_char = 127;
5319 hftctl (0, HFSKBD, &buf);
5320 }
5321 }
5322
5323 /* Reset the rubout key to backspace. */
5324
5325 void
5326 hft_reset (struct tty_display_info *tty_out)
5327 {
5328 struct hfbuf buf;
5329 struct hfkeymap keymap;
5330 int junk;
5331
5332 #ifdef IBMR2AIX
5333 if (ioctl (0, HFQERROR, &junk) < 0)
5334 return;
5335 #else /* not IBMR2AIX */
5336 if (ioctl (0, HFQEIO, 0) < 0)
5337 return;
5338 #endif /* not IBMR2AIX */
5339
5340 buf.hf_bufp = (char *)&keymap;
5341 buf.hf_buflen = sizeof (keymap);
5342 keymap.hf_nkeys = 2;
5343 keymap.hfkey[0].hf_kpos = 15;
5344 keymap.hfkey[0].hf_kstate = HFMAPCHAR | HFSHFNONE;
5345 #ifdef IBMR2AIX
5346 keymap.hfkey[0].hf_keyidh = '<';
5347 #else /* not IBMR2AIX */
5348 keymap.hfkey[0].hf_page = '<';
5349 #endif /* not IBMR2AIX */
5350 keymap.hfkey[0].hf_char = 8;
5351 keymap.hfkey[1].hf_kpos = 15;
5352 keymap.hfkey[1].hf_kstate = HFMAPCHAR | HFSHFSHFT;
5353 #ifdef IBMR2AIX
5354 keymap.hfkey[1].hf_keyidh = '<';
5355 #else /* not IBMR2AIX */
5356 keymap.hfkey[1].hf_page = '<';
5357 #endif /* not IBMR2AIX */
5358 keymap.hfkey[1].hf_char = 8;
5359 hftctl (0, HFSKBD, &buf);
5360 }
5361
5362 #endif /* AIXHFT */
5363
5364 #ifdef USE_DL_STUBS
5365
5366 /* These are included on Sunos 4.1 when we do not use shared libraries.
5367 X11 libraries may refer to these functions but (we hope) do not
5368 actually call them. */
5369
5370 void *
5371 dlopen ()
5372 {
5373 return 0;
5374 }
5375
5376 void *
5377 dlsym ()
5378 {
5379 return 0;
5380 }
5381
5382 int
5383 dlclose ()
5384 {
5385 return -1;
5386 }
5387
5388 #endif /* USE_DL_STUBS */
5389 \f
5390 #ifndef BSTRING
5391
5392 #ifndef bzero
5393
5394 void
5395 bzero (b, length)
5396 register char *b;
5397 register int length;
5398 {
5399 #ifdef VMS
5400 short zero = 0;
5401 long max_str = 65535;
5402
5403 while (length > max_str) {
5404 (void) LIB$MOVC5 (&zero, &zero, &zero, &max_str, b);
5405 length -= max_str;
5406 b += max_str;
5407 }
5408 max_str = length;
5409 (void) LIB$MOVC5 (&zero, &zero, &zero, &max_str, b);
5410 #else
5411 while (length-- > 0)
5412 *b++ = 0;
5413 #endif /* not VMS */
5414 }
5415
5416 #endif /* no bzero */
5417 #endif /* BSTRING */
5418
5419 #if (!defined (BSTRING) && !defined (bcopy)) || defined (NEED_BCOPY)
5420 #undef bcopy
5421
5422 /* Saying `void' requires a declaration, above, where bcopy is used
5423 and that declaration causes pain for systems where bcopy is a macro. */
5424 bcopy (b1, b2, length)
5425 register char *b1;
5426 register char *b2;
5427 register int length;
5428 {
5429 #ifdef VMS
5430 long max_str = 65535;
5431
5432 while (length > max_str) {
5433 (void) LIB$MOVC3 (&max_str, b1, b2);
5434 length -= max_str;
5435 b1 += max_str;
5436 b2 += max_str;
5437 }
5438 max_str = length;
5439 (void) LIB$MOVC3 (&length, b1, b2);
5440 #else
5441 while (length-- > 0)
5442 *b2++ = *b1++;
5443 #endif /* not VMS */
5444 }
5445 #endif /* (!defined (BSTRING) && !defined (bcopy)) || defined (NEED_BCOPY) */
5446
5447 #ifndef BSTRING
5448 #ifndef bcmp
5449 int
5450 bcmp (b1, b2, length) /* This could be a macro! */
5451 register char *b1;
5452 register char *b2;
5453 register int length;
5454 {
5455 #ifdef VMS
5456 struct dsc$descriptor_s src1 = {length, DSC$K_DTYPE_T, DSC$K_CLASS_S, b1};
5457 struct dsc$descriptor_s src2 = {length, DSC$K_DTYPE_T, DSC$K_CLASS_S, b2};
5458
5459 return STR$COMPARE (&src1, &src2);
5460 #else
5461 while (length-- > 0)
5462 if (*b1++ != *b2++)
5463 return 1;
5464
5465 return 0;
5466 #endif /* not VMS */
5467 }
5468 #endif /* no bcmp */
5469 #endif /* not BSTRING */
5470 \f
5471 #ifndef HAVE_STRSIGNAL
5472 char *
5473 strsignal (code)
5474 int code;
5475 {
5476 char *signame = 0;
5477
5478 if (0 <= code && code < NSIG)
5479 {
5480 #ifdef VMS
5481 signame = sys_errlist[code];
5482 #else
5483 /* Cast to suppress warning if the table has const char *. */
5484 signame = (char *) sys_siglist[code];
5485 #endif
5486 }
5487
5488 return signame;
5489 }
5490 #endif /* HAVE_STRSIGNAL */
5491
5492 /* arch-tag: edb43589-4e09-4544-b325-978b5b121dcf
5493 (do not change this comment) */
Unnamed repository; edit this file 'description' to name the repository.