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Patch for building Emacs on Mac OS X. April 26, 2002. See ChangeLog,
[bpt/emacs.git] / src / sysdep.c
1 /* Interfaces to system-dependent kernel and library entries.
2 Copyright (C) 1985, 86,87,88,93,94,95, 1999, 2000, 2001
3 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., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
21
22 #ifdef HAVE_CONFIG_H
23 #include <config.h>
24 #endif
25
26 #include <signal.h>
27 #include <setjmp.h>
28 #ifdef HAVE_UNISTD_H
29 #include <unistd.h>
30 #endif
31 #include "lisp.h"
32 /* Including stdlib.h isn't necessarily enough to get srandom
33 declared, e.g. without __USE_XOPEN_EXTENDED with glibc 2. */
34 #ifdef HAVE_RANDOM
35 #if 0 /* It turns out that defining _OSF_SOURCE in osf5-0.h gets
36 random prototyped as returning `int'. It looks to me as
37 though the best way to DTRT is to prefer the rand48 functions
38 (per libc.info). -- fx */
39 extern long int random P_ ((void));
40 #endif
41 #if 0 /* Don't prototype srandom; it takes an unsigned argument on
42 some systems, and an unsigned long on others, like FreeBSD
43 4.1. */
44 extern void srandom P_ ((unsigned int));
45 #endif
46 #endif
47
48 #include "blockinput.h"
49 #undef NULL
50
51 #ifdef MAC_OS8
52 /* It is essential to include stdlib.h so that this file picks up
53 the correct definitions of rand, srand, and RAND_MAX.
54 Otherwise random numbers will not work correctly. */
55 #include <stdlib.h>
56
57 #ifndef subprocesses
58 /* Nonzero means delete a process right away if it exits (process.c). */
59 static int delete_exited_processes;
60 #endif
61 #endif /* MAC_OS8 */
62
63 #ifdef WINDOWSNT
64 #define read sys_read
65 #define write sys_write
66 #include <windows.h>
67 #ifndef NULL
68 #define NULL 0
69 #endif
70 #endif /* not WINDOWSNT */
71
72 /* Does anyone other than VMS need this? */
73 #ifndef fwrite
74 #define sys_fwrite fwrite
75 #else
76 #undef fwrite
77 #endif
78
79 #include <stdio.h>
80 #include <sys/types.h>
81 #include <sys/stat.h>
82 #include <errno.h>
83
84 /* Get _POSIX_VDISABLE, if it is available. */
85 #ifdef HAVE_UNISTD_H
86 #include <unistd.h>
87 #endif
88
89 #ifdef HAVE_STDLIB_H
90 #include <stdlib.h>
91 #endif
92
93 #ifdef HAVE_SETPGID
94 #if !defined (USG) || defined (BSD_PGRPS)
95 #undef setpgrp
96 #define setpgrp setpgid
97 #endif
98 #endif
99
100 /* Get SI_SRPC_DOMAIN, if it is available. */
101 #ifdef HAVE_SYS_SYSTEMINFO_H
102 #include <sys/systeminfo.h>
103 #endif
104
105 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida, MW Aug 1993 */
106 #include <dos.h>
107 #include "dosfns.h"
108 #include "msdos.h"
109 #include <sys/param.h>
110
111 #if __DJGPP__ > 1
112 extern int etext;
113 extern unsigned start __asm__ ("start");
114 #endif
115 #endif
116
117 #ifndef USE_CRT_DLL
118 #ifndef errno
119 extern int errno;
120 #endif
121 #endif
122
123 #ifdef VMS
124 #include <rms.h>
125 #include <ttdef.h>
126 #include <tt2def.h>
127 #include <iodef.h>
128 #include <ssdef.h>
129 #include <descrip.h>
130 #include <fibdef.h>
131 #include <atrdef.h>
132 #include <ctype.h>
133 #include <string.h>
134 #ifdef __GNUC__
135 #include <sys/file.h>
136 #else
137 #include <file.h>
138 #endif
139 #undef F_SETFL
140 #ifndef RAB$C_BID
141 #include <rab.h>
142 #endif
143 #define MAXIOSIZE (32 * PAGESIZE) /* Don't I/O more than 32 blocks at a time */
144 #endif /* VMS */
145
146 #ifndef BSD4_1
147 #ifdef BSD_SYSTEM /* avoid writing defined (BSD_SYSTEM) || defined (USG)
148 because the vms compiler doesn't grok `defined' */
149 #include <fcntl.h>
150 #endif
151 #ifdef USG
152 #ifndef USG5
153 #include <fcntl.h>
154 #endif
155 #endif
156 #endif /* not 4.1 bsd */
157
158 #ifndef MSDOS
159 #include <sys/ioctl.h>
160 #endif
161
162 #include "systty.h"
163 #include "syswait.h"
164
165 #ifdef BROKEN_TIOCGWINSZ
166 #undef TIOCGWINSZ
167 #undef TIOCSWINSZ
168 #endif
169
170 #if defined (USG) || defined (DGUX)
171 #include <sys/utsname.h>
172 #ifndef MEMORY_IN_STRING_H
173 #include <memory.h>
174 #endif
175 #if defined (TIOCGWINSZ) || defined (ISC4_0)
176 #ifdef NEED_SIOCTL
177 #include <sys/sioctl.h>
178 #endif
179 #ifdef NEED_PTEM_H
180 #include <sys/stream.h>
181 #include <sys/ptem.h>
182 #endif
183 #endif /* TIOCGWINSZ or ISC4_0 */
184 #endif /* USG or DGUX */
185
186 extern int quit_char;
187
188 #include "keyboard.h"
189 #include "frame.h"
190 #include "window.h"
191 #include "termhooks.h"
192 #include "termchar.h"
193 #include "termopts.h"
194 #include "dispextern.h"
195 #include "process.h"
196
197 #ifdef WINDOWSNT
198 #include <direct.h>
199 /* In process.h which conflicts with the local copy. */
200 #define _P_WAIT 0
201 int _CRTAPI1 _spawnlp (int, const char *, const char *, ...);
202 int _CRTAPI1 _getpid (void);
203 #endif
204
205 #ifdef NONSYSTEM_DIR_LIBRARY
206 #include "ndir.h"
207 #endif /* NONSYSTEM_DIR_LIBRARY */
208
209 #include "syssignal.h"
210 #include "systime.h"
211 #ifdef HAVE_UTIME_H
212 #include <utime.h>
213 #endif
214
215 #ifndef HAVE_UTIMES
216 #ifndef HAVE_STRUCT_UTIMBUF
217 /* We want to use utime rather than utimes, but we couldn't find the
218 structure declaration. We'll use the traditional one. */
219 struct utimbuf {
220 long actime;
221 long modtime;
222 };
223 #endif
224 #endif
225
226 /* LPASS8 is new in 4.3, and makes cbreak mode provide all 8 bits. */
227 #ifndef LPASS8
228 #define LPASS8 0
229 #endif
230
231 #ifdef BSD4_1
232 #define LNOFLSH 0100000
233 #endif
234
235 static int baud_convert[] =
236 #ifdef BAUD_CONVERT
237 BAUD_CONVERT;
238 #else
239 {
240 0, 50, 75, 110, 135, 150, 200, 300, 600, 1200,
241 1800, 2400, 4800, 9600, 19200, 38400
242 };
243 #endif
244
245 #ifdef HAVE_SPEED_T
246 #include <termios.h>
247 #else
248 #if defined (HAVE_LIBNCURSES) && ! defined (NCURSES_OSPEED_T)
249 #else
250 #if defined (HAVE_TERMIOS_H) && defined (GNU_LINUX)
251 #include <termios.h>
252 #endif
253 #endif
254 #endif
255
256 int emacs_ospeed;
257
258 /* The file descriptor for Emacs's input terminal.
259 Under Unix, this is normally zero except when using X;
260 under VMS, we place the input channel number here. */
261 int input_fd;
262
263 void croak P_ ((char *));
264
265 #ifdef AIXHFT
266 void hft_init ();
267 void hft_reset ();
268 #endif
269
270 /* Temporary used by `sigblock' when defined in terms of signprocmask. */
271
272 SIGMASKTYPE sigprocmask_set;
273
274 \f
275 /* Specify a different file descriptor for further input operations. */
276
277 void
278 change_input_fd (fd)
279 int fd;
280 {
281 input_fd = fd;
282 }
283
284 /* Discard pending input on descriptor input_fd. */
285
286 void
287 discard_tty_input ()
288 {
289 #ifndef WINDOWSNT
290 struct emacs_tty buf;
291
292 if (noninteractive)
293 return;
294
295 /* Discarding input is not safe when the input could contain
296 replies from the X server. So don't do it. */
297 if (read_socket_hook)
298 return;
299
300 #ifdef VMS
301 end_kbd_input ();
302 SYS$QIOW (0, input_fd, IO$_READVBLK|IO$M_PURGE, input_iosb, 0, 0,
303 &buf.main, 0, 0, terminator_mask, 0, 0);
304 queue_kbd_input ();
305 #else /* not VMS */
306 #ifdef APOLLO
307 {
308 int zero = 0;
309 ioctl (input_fd, TIOCFLUSH, &zero);
310 }
311 #else /* not Apollo */
312 #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */
313 while (dos_keyread () != -1)
314 ;
315 #else /* not MSDOS */
316 EMACS_GET_TTY (input_fd, &buf);
317 EMACS_SET_TTY (input_fd, &buf, 0);
318 #endif /* not MSDOS */
319 #endif /* not Apollo */
320 #endif /* not VMS */
321 #endif /* not WINDOWSNT */
322 }
323
324 #ifdef SIGTSTP
325
326 /* Arrange for character C to be read as the next input from
327 the terminal. */
328
329 void
330 stuff_char (c)
331 char c;
332 {
333 if (read_socket_hook)
334 return;
335
336 /* Should perhaps error if in batch mode */
337 #ifdef TIOCSTI
338 ioctl (input_fd, TIOCSTI, &c);
339 #else /* no TIOCSTI */
340 error ("Cannot stuff terminal input characters in this version of Unix");
341 #endif /* no TIOCSTI */
342 }
343
344 #endif /* SIGTSTP */
345 \f
346 void
347 init_baud_rate ()
348 {
349 if (noninteractive)
350 emacs_ospeed = 0;
351 else
352 {
353 #ifdef INIT_BAUD_RATE
354 INIT_BAUD_RATE ();
355 #else
356 #ifdef DOS_NT
357 emacs_ospeed = 15;
358 #else /* not DOS_NT */
359 #ifdef VMS
360 struct sensemode sg;
361
362 SYS$QIOW (0, input_fd, IO$_SENSEMODE, &sg, 0, 0,
363 &sg.class, 12, 0, 0, 0, 0 );
364 emacs_ospeed = sg.xmit_baud;
365 #else /* not VMS */
366 #ifdef HAVE_TERMIOS
367 struct termios sg;
368
369 sg.c_cflag = B9600;
370 tcgetattr (input_fd, &sg);
371 emacs_ospeed = cfgetospeed (&sg);
372 #if defined (USE_GETOBAUD) && defined (getobaud)
373 /* m88k-motorola-sysv3 needs this (ghazi@noc.rutgers.edu) 9/1/94. */
374 if (emacs_ospeed == 0)
375 emacs_ospeed = getobaud (sg.c_cflag);
376 #endif
377 #else /* neither VMS nor TERMIOS */
378 #ifdef HAVE_TERMIO
379 struct termio sg;
380
381 sg.c_cflag = B9600;
382 #ifdef HAVE_TCATTR
383 tcgetattr (input_fd, &sg);
384 #else
385 ioctl (input_fd, TCGETA, &sg);
386 #endif
387 emacs_ospeed = sg.c_cflag & CBAUD;
388 #else /* neither VMS nor TERMIOS nor TERMIO */
389 struct sgttyb sg;
390
391 sg.sg_ospeed = B9600;
392 if (ioctl (input_fd, TIOCGETP, &sg) < 0)
393 abort ();
394 emacs_ospeed = sg.sg_ospeed;
395 #endif /* not HAVE_TERMIO */
396 #endif /* not HAVE_TERMIOS */
397 #endif /* not VMS */
398 #endif /* not DOS_NT */
399 #endif /* not INIT_BAUD_RATE */
400 }
401
402 baud_rate = (emacs_ospeed < sizeof baud_convert / sizeof baud_convert[0]
403 ? baud_convert[emacs_ospeed] : 9600);
404 if (baud_rate == 0)
405 baud_rate = 1200;
406 }
407
408 /*ARGSUSED*/
409 void
410 set_exclusive_use (fd)
411 int fd;
412 {
413 #ifdef FIOCLEX
414 ioctl (fd, FIOCLEX, 0);
415 #endif
416 /* Ok to do nothing if this feature does not exist */
417 }
418 \f
419 #ifndef subprocesses
420
421 wait_without_blocking ()
422 {
423 #ifdef BSD_SYSTEM
424 wait3 (0, WNOHANG | WUNTRACED, 0);
425 #else
426 croak ("wait_without_blocking");
427 #endif
428 synch_process_alive = 0;
429 }
430
431 #endif /* not subprocesses */
432
433 int wait_debugging; /* Set nonzero to make following function work under dbx
434 (at least for bsd). */
435
436 SIGTYPE
437 wait_for_termination_signal ()
438 {}
439
440 /* Wait for subprocess with process id `pid' to terminate and
441 make sure it will get eliminated (not remain forever as a zombie) */
442
443 void
444 wait_for_termination (pid)
445 int pid;
446 {
447 while (1)
448 {
449 #ifdef subprocesses
450 #ifdef VMS
451 int status;
452
453 status = SYS$FORCEX (&pid, 0, 0);
454 break;
455 #else /* not VMS */
456 #if defined (BSD_SYSTEM) || (defined (HPUX) && !defined (HPUX_5))
457 /* Note that kill returns -1 even if the process is just a zombie now.
458 But inevitably a SIGCHLD interrupt should be generated
459 and child_sig will do wait3 and make the process go away. */
460 /* There is some indication that there is a bug involved with
461 termination of subprocesses, perhaps involving a kernel bug too,
462 but no idea what it is. Just as a hunch we signal SIGCHLD to see
463 if that causes the problem to go away or get worse. */
464 sigsetmask (sigmask (SIGCHLD));
465 if (0 > kill (pid, 0))
466 {
467 sigsetmask (SIGEMPTYMASK);
468 kill (getpid (), SIGCHLD);
469 break;
470 }
471 if (wait_debugging)
472 sleep (1);
473 else
474 sigpause (SIGEMPTYMASK);
475 #else /* not BSD_SYSTEM, and not HPUX version >= 6 */
476 #if defined (UNIPLUS)
477 if (0 > kill (pid, 0))
478 break;
479 wait (0);
480 #else /* neither BSD_SYSTEM nor UNIPLUS: random sysV */
481 #ifdef POSIX_SIGNALS /* would this work for GNU/Linux as well? */
482 sigblock (sigmask (SIGCHLD));
483 errno = 0;
484 if (kill (pid, 0) == -1 && errno == ESRCH)
485 {
486 sigunblock (sigmask (SIGCHLD));
487 break;
488 }
489
490 sigsuspend (&empty_mask);
491 #else /* not POSIX_SIGNALS */
492 #ifdef HAVE_SYSV_SIGPAUSE
493 sighold (SIGCHLD);
494 if (0 > kill (pid, 0))
495 {
496 sigrelse (SIGCHLD);
497 break;
498 }
499 sigpause (SIGCHLD);
500 #else /* not HAVE_SYSV_SIGPAUSE */
501 #ifdef WINDOWSNT
502 wait (0);
503 break;
504 #else /* not WINDOWSNT */
505 if (0 > kill (pid, 0))
506 break;
507 /* Using sleep instead of pause avoids timing error.
508 If the inferior dies just before the sleep,
509 we lose just one second. */
510 sleep (1);
511 #endif /* not WINDOWSNT */
512 #endif /* not HAVE_SYSV_SIGPAUSE */
513 #endif /* not POSIX_SIGNALS */
514 #endif /* not UNIPLUS */
515 #endif /* not BSD_SYSTEM, and not HPUX version >= 6 */
516 #endif /* not VMS */
517 #else /* not subprocesses */
518 #if __DJGPP__ > 1
519 break;
520 #else /* not __DJGPP__ > 1 */
521 #ifndef BSD4_1
522 if (kill (pid, 0) < 0)
523 break;
524 wait (0);
525 #else /* BSD4_1 */
526 int status;
527 status = wait (0);
528 if (status == pid || status == -1)
529 break;
530 #endif /* BSD4_1 */
531 #endif /* not __DJGPP__ > 1*/
532 #endif /* not subprocesses */
533 }
534 }
535
536 #ifdef subprocesses
537
538 /*
539 * flush any pending output
540 * (may flush input as well; it does not matter the way we use it)
541 */
542
543 void
544 flush_pending_output (channel)
545 int channel;
546 {
547 #ifdef HAVE_TERMIOS
548 /* If we try this, we get hit with SIGTTIN, because
549 the child's tty belongs to the child's pgrp. */
550 #else
551 #ifdef TCFLSH
552 ioctl (channel, TCFLSH, 1);
553 #else
554 #ifdef TIOCFLUSH
555 int zero = 0;
556 /* 3rd arg should be ignored
557 but some 4.2 kernels actually want the address of an int
558 and nonzero means something different. */
559 ioctl (channel, TIOCFLUSH, &zero);
560 #endif
561 #endif
562 #endif
563 }
564 \f
565 #ifndef VMS
566 /* Set up the terminal at the other end of a pseudo-terminal that
567 we will be controlling an inferior through.
568 It should not echo or do line-editing, since that is done
569 in Emacs. No padding needed for insertion into an Emacs buffer. */
570
571 void
572 child_setup_tty (out)
573 int out;
574 {
575 #ifndef DOS_NT
576 struct emacs_tty s;
577
578 EMACS_GET_TTY (out, &s);
579
580 #if defined (HAVE_TERMIO) || defined (HAVE_TERMIOS)
581 s.main.c_oflag |= OPOST; /* Enable output postprocessing */
582 s.main.c_oflag &= ~ONLCR; /* Disable map of NL to CR-NL on output */
583 #ifdef NLDLY
584 s.main.c_oflag &= ~(NLDLY|CRDLY|TABDLY|BSDLY|VTDLY|FFDLY);
585 /* No output delays */
586 #endif
587 s.main.c_lflag &= ~ECHO; /* Disable echo */
588 s.main.c_lflag |= ISIG; /* Enable signals */
589 #if 0 /* This causes bugs in (for instance) telnet to certain sites. */
590 s.main.c_iflag &= ~ICRNL; /* Disable map of CR to NL on input */
591 #ifdef INLCR /* Just being cautious, since I can't check how
592 widespread INLCR is--rms. */
593 s.main.c_iflag &= ~INLCR; /* Disable map of NL to CR on input */
594 #endif
595 #endif
596 #ifdef IUCLC
597 s.main.c_iflag &= ~IUCLC; /* Disable downcasing on input. */
598 #endif
599 #ifdef ISTRIP
600 s.main.c_iflag &= ~ISTRIP; /* don't strip 8th bit on input */
601 #endif
602 #ifdef OLCUC
603 s.main.c_oflag &= ~OLCUC; /* Disable upcasing on output. */
604 #endif
605 s.main.c_oflag &= ~TAB3; /* Disable tab expansion */
606 s.main.c_cflag = (s.main.c_cflag & ~CSIZE) | CS8; /* Don't strip 8th bit */
607 #if 0
608 /* Said to be unnecessary: */
609 s.main.c_cc[VMIN] = 1; /* minimum number of characters to accept */
610 s.main.c_cc[VTIME] = 0; /* wait forever for at least 1 character */
611 #endif
612
613 s.main.c_lflag |= ICANON; /* Enable erase/kill and eof processing */
614 s.main.c_cc[VEOF] = 04; /* insure that EOF is Control-D */
615 s.main.c_cc[VERASE] = CDISABLE; /* disable erase processing */
616 s.main.c_cc[VKILL] = CDISABLE; /* disable kill processing */
617
618 #ifdef HPUX
619 s.main.c_cflag = (s.main.c_cflag & ~CBAUD) | B9600; /* baud rate sanity */
620 #endif /* HPUX */
621
622 #ifdef AIX
623 /* AIX enhanced edit loses NULs, so disable it */
624 #ifndef IBMR2AIX
625 s.main.c_line = 0;
626 s.main.c_iflag &= ~ASCEDIT;
627 #endif
628 /* Also, PTY overloads NUL and BREAK.
629 don't ignore break, but don't signal either, so it looks like NUL. */
630 s.main.c_iflag &= ~IGNBRK;
631 s.main.c_iflag &= ~BRKINT;
632 /* QUIT and INTR work better as signals, so disable character forms */
633 s.main.c_cc[VINTR] = 0377;
634 #ifdef SIGNALS_VIA_CHARACTERS
635 /* the QUIT and INTR character are used in process_send_signal
636 so set them here to something useful. */
637 if (s.main.c_cc[VQUIT] == 0377)
638 s.main.c_cc[VQUIT] = '\\'&037; /* Control-\ */
639 if (s.main.c_cc[VINTR] == 0377)
640 s.main.c_cc[VINTR] = 'C'&037; /* Control-C */
641 #else /* no TIOCGPGRP or no TIOCGLTC or no TIOCGETC */
642 /* QUIT and INTR work better as signals, so disable character forms */
643 s.main.c_cc[VQUIT] = 0377;
644 s.main.c_cc[VINTR] = 0377;
645 s.main.c_lflag &= ~ISIG;
646 #endif /* no TIOCGPGRP or no TIOCGLTC or no TIOCGETC */
647 s.main.c_cc[VEOL] = 0377;
648 s.main.c_cflag = (s.main.c_cflag & ~CBAUD) | B9600; /* baud rate sanity */
649 #endif /* AIX */
650
651 #else /* not HAVE_TERMIO */
652
653 s.main.sg_flags &= ~(ECHO | CRMOD | ANYP | ALLDELAY | RAW | LCASE
654 | CBREAK | TANDEM);
655 s.main.sg_flags |= LPASS8;
656 s.main.sg_erase = 0377;
657 s.main.sg_kill = 0377;
658 s.lmode = LLITOUT | s.lmode; /* Don't strip 8th bit */
659
660 #endif /* not HAVE_TERMIO */
661
662 EMACS_SET_TTY (out, &s, 0);
663
664 #ifdef BSD4_1
665 if (interrupt_input)
666 reset_sigio ();
667 #endif /* BSD4_1 */
668 #ifdef RTU
669 {
670 int zero = 0;
671 ioctl (out, FIOASYNC, &zero);
672 }
673 #endif /* RTU */
674 #endif /* not DOS_NT */
675 }
676 #endif /* not VMS */
677
678 #endif /* subprocesses */
679 \f
680 /* Record a signal code and the handler for it. */
681 struct save_signal
682 {
683 int code;
684 SIGTYPE (*handler) P_ ((int));
685 };
686
687 static void save_signal_handlers P_ ((struct save_signal *));
688 static void restore_signal_handlers P_ ((struct save_signal *));
689
690 /* Suspend the Emacs process; give terminal to its superior. */
691
692 void
693 sys_suspend ()
694 {
695 #ifdef VMS
696 /* "Foster" parentage allows emacs to return to a subprocess that attached
697 to the current emacs as a cheaper than starting a whole new process. This
698 is set up by KEPTEDITOR.COM. */
699 unsigned long parent_id, foster_parent_id;
700 char *fpid_string;
701
702 fpid_string = getenv ("EMACS_PARENT_PID");
703 if (fpid_string != NULL)
704 {
705 sscanf (fpid_string, "%x", &foster_parent_id);
706 if (foster_parent_id != 0)
707 parent_id = foster_parent_id;
708 else
709 parent_id = getppid ();
710 }
711 else
712 parent_id = getppid ();
713
714 xfree (fpid_string); /* On VMS, this was malloc'd */
715
716 if (parent_id && parent_id != 0xffffffff)
717 {
718 SIGTYPE (*oldsig)() = (int) signal (SIGINT, SIG_IGN);
719 int status = LIB$ATTACH (&parent_id) & 1;
720 signal (SIGINT, oldsig);
721 return status;
722 }
723 else
724 {
725 struct {
726 int l;
727 char *a;
728 } d_prompt;
729 d_prompt.l = sizeof ("Emacs: "); /* Our special prompt */
730 d_prompt.a = "Emacs: "; /* Just a reminder */
731 LIB$SPAWN (0, 0, 0, 0, 0, 0, 0, 0, 0, 0, &d_prompt, 0);
732 return 1;
733 }
734 return -1;
735 #else
736 #if defined (SIGTSTP) && !defined (MSDOS)
737
738 {
739 int pgrp = EMACS_GETPGRP (0);
740 EMACS_KILLPG (pgrp, SIGTSTP);
741 }
742
743 #else /* No SIGTSTP */
744 #ifdef USG_JOBCTRL /* If you don't know what this is don't mess with it */
745 ptrace (0, 0, 0, 0); /* set for ptrace - caught by csh */
746 kill (getpid (), SIGQUIT);
747
748 #else /* No SIGTSTP or USG_JOBCTRL */
749
750 /* On a system where suspending is not implemented,
751 instead fork a subshell and let it talk directly to the terminal
752 while we wait. */
753 sys_subshell ();
754
755 #endif /* no USG_JOBCTRL */
756 #endif /* no SIGTSTP */
757 #endif /* not VMS */
758 }
759
760 /* Fork a subshell. */
761
762 #ifndef MAC_OS8
763 void
764 sys_subshell ()
765 {
766 #ifndef VMS
767 #ifdef DOS_NT /* Demacs 1.1.2 91/10/20 Manabu Higashida */
768 int st;
769 char oldwd[MAXPATHLEN+1]; /* Fixed length is safe on MSDOS. */
770 #endif
771 int pid;
772 struct save_signal saved_handlers[5];
773 Lisp_Object dir;
774 unsigned char *str = 0;
775 int len;
776
777 saved_handlers[0].code = SIGINT;
778 saved_handlers[1].code = SIGQUIT;
779 saved_handlers[2].code = SIGTERM;
780 #ifdef SIGIO
781 saved_handlers[3].code = SIGIO;
782 saved_handlers[4].code = 0;
783 #else
784 saved_handlers[3].code = 0;
785 #endif
786
787 /* Mentioning current_buffer->buffer would mean including buffer.h,
788 which somehow wedges the hp compiler. So instead... */
789
790 dir = intern ("default-directory");
791 if (NILP (Fboundp (dir)))
792 goto xyzzy;
793 dir = Fsymbol_value (dir);
794 if (!STRINGP (dir))
795 goto xyzzy;
796
797 dir = expand_and_dir_to_file (Funhandled_file_name_directory (dir), Qnil);
798 str = (unsigned char *) alloca (XSTRING (dir)->size + 2);
799 len = XSTRING (dir)->size;
800 bcopy (XSTRING (dir)->data, str, len);
801 if (str[len - 1] != '/') str[len++] = '/';
802 str[len] = 0;
803 xyzzy:
804
805 #ifdef DOS_NT
806 pid = 0;
807 #if __DJGPP__ > 1
808 save_signal_handlers (saved_handlers);
809 synch_process_alive = 1;
810 #endif /* __DJGPP__ > 1 */
811 #else
812 pid = vfork ();
813 if (pid == -1)
814 error ("Can't spawn subshell");
815 #endif
816
817 if (pid == 0)
818 {
819 char *sh = 0;
820
821 #ifdef DOS_NT /* MW, Aug 1993 */
822 getwd (oldwd);
823 if (sh == 0)
824 sh = (char *) egetenv ("SUSPEND"); /* KFS, 1994-12-14 */
825 #endif
826 if (sh == 0)
827 sh = (char *) egetenv ("SHELL");
828 if (sh == 0)
829 sh = "sh";
830
831 /* Use our buffer's default directory for the subshell. */
832 if (str)
833 chdir ((char *) str);
834
835 #ifdef subprocesses
836 close_process_descs (); /* Close Emacs's pipes/ptys */
837 #endif
838
839 #ifdef SET_EMACS_PRIORITY
840 {
841 extern EMACS_INT emacs_priority;
842
843 if (emacs_priority < 0)
844 nice (-emacs_priority);
845 }
846 #endif
847
848 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */
849 {
850 char *epwd = getenv ("PWD");
851 char old_pwd[MAXPATHLEN+1+4];
852
853 /* If PWD is set, pass it with corrected value. */
854 if (epwd)
855 {
856 strcpy (old_pwd, epwd);
857 if (str[len - 1] == '/')
858 str[len - 1] = '\0';
859 setenv ("PWD", str, 1);
860 }
861 st = system (sh);
862 chdir (oldwd);
863 if (epwd)
864 putenv (old_pwd); /* restore previous value */
865 }
866 #if 0 /* This is also reported if last command executed in subshell failed, KFS */
867 if (st)
868 report_file_error ("Can't execute subshell", Fcons (build_string (sh), Qnil));
869 #endif
870 #else /* not MSDOS */
871 #ifdef WINDOWSNT
872 /* Waits for process completion */
873 pid = _spawnlp (_P_WAIT, sh, sh, NULL);
874 chdir (oldwd);
875 if (pid == -1)
876 write (1, "Can't execute subshell", 22);
877 #else /* not WINDOWSNT */
878 execlp (sh, sh, 0);
879 write (1, "Can't execute subshell", 22);
880 _exit (1);
881 #endif /* not WINDOWSNT */
882 #endif /* not MSDOS */
883 }
884
885 /* Do this now if we did not do it before. */
886 #if !defined (MSDOS) || __DJGPP__ == 1
887 save_signal_handlers (saved_handlers);
888 synch_process_alive = 1;
889 #endif
890
891 #ifndef DOS_NT
892 wait_for_termination (pid);
893 #endif
894 restore_signal_handlers (saved_handlers);
895 synch_process_alive = 0;
896 #endif /* !VMS */
897 }
898 #endif /* !MAC_OS8 */
899
900 static void
901 save_signal_handlers (saved_handlers)
902 struct save_signal *saved_handlers;
903 {
904 while (saved_handlers->code)
905 {
906 saved_handlers->handler
907 = (SIGTYPE (*) P_ ((int))) signal (saved_handlers->code, SIG_IGN);
908 saved_handlers++;
909 }
910 }
911
912 static void
913 restore_signal_handlers (saved_handlers)
914 struct save_signal *saved_handlers;
915 {
916 while (saved_handlers->code)
917 {
918 signal (saved_handlers->code, saved_handlers->handler);
919 saved_handlers++;
920 }
921 }
922 \f
923 #ifdef F_SETFL
924
925 int old_fcntl_flags;
926
927 void
928 init_sigio (fd)
929 int fd;
930 {
931 #ifdef FASYNC
932 old_fcntl_flags = fcntl (fd, F_GETFL, 0) & ~FASYNC;
933 fcntl (fd, F_SETFL, old_fcntl_flags | FASYNC);
934 #endif
935 interrupts_deferred = 0;
936 }
937
938 void
939 reset_sigio ()
940 {
941 unrequest_sigio ();
942 }
943
944 #ifdef FASYNC /* F_SETFL does not imply existence of FASYNC */
945
946 void
947 request_sigio ()
948 {
949 if (read_socket_hook)
950 return;
951
952 #ifdef SIGWINCH
953 sigunblock (sigmask (SIGWINCH));
954 #endif
955 fcntl (input_fd, F_SETFL, old_fcntl_flags | FASYNC);
956
957 interrupts_deferred = 0;
958 }
959
960 void
961 unrequest_sigio ()
962 {
963 if (read_socket_hook)
964 return;
965
966 #ifdef SIGWINCH
967 sigblock (sigmask (SIGWINCH));
968 #endif
969 fcntl (input_fd, F_SETFL, old_fcntl_flags);
970 interrupts_deferred = 1;
971 }
972
973 #else /* no FASYNC */
974 #ifdef STRIDE /* Stride doesn't have FASYNC - use FIOASYNC */
975
976 void
977 request_sigio ()
978 {
979 int on = 1;
980
981 if (read_socket_hook)
982 return;
983
984 ioctl (input_fd, FIOASYNC, &on);
985 interrupts_deferred = 0;
986 }
987
988 void
989 unrequest_sigio ()
990 {
991 int off = 0;
992
993 if (read_socket_hook)
994 return;
995
996 ioctl (input_fd, FIOASYNC, &off);
997 interrupts_deferred = 1;
998 }
999
1000 #else /* not FASYNC, not STRIDE */
1001
1002 #ifdef _CX_UX
1003
1004 #include <termios.h>
1005
1006 void
1007 request_sigio ()
1008 {
1009 int on = 1;
1010 sigset_t st;
1011
1012 if (read_socket_hook)
1013 return;
1014
1015 sigemptyset (&st);
1016 sigaddset (&st, SIGIO);
1017 ioctl (input_fd, FIOASYNC, &on);
1018 interrupts_deferred = 0;
1019 sigprocmask (SIG_UNBLOCK, &st, (sigset_t *)0);
1020 }
1021
1022 void
1023 unrequest_sigio ()
1024 {
1025 int off = 0;
1026
1027 if (read_socket_hook)
1028 return;
1029
1030 ioctl (input_fd, FIOASYNC, &off);
1031 interrupts_deferred = 1;
1032 }
1033
1034 #else /* ! _CX_UX */
1035
1036 void
1037 request_sigio ()
1038 {
1039 if (read_socket_hook)
1040 return;
1041
1042 croak ("request_sigio");
1043 }
1044
1045 void
1046 unrequest_sigio ()
1047 {
1048 if (read_socket_hook)
1049 return;
1050
1051 croak ("unrequest_sigio");
1052 }
1053
1054 #endif /* _CX_UX */
1055 #endif /* STRIDE */
1056 #endif /* FASYNC */
1057 #endif /* F_SETFL */
1058 \f
1059 /* Saving and restoring the process group of Emacs's terminal. */
1060
1061 #ifdef BSD_PGRPS
1062
1063 /* The process group of which Emacs was a member when it initially
1064 started.
1065
1066 If Emacs was in its own process group (i.e. inherited_pgroup ==
1067 getpid ()), then we know we're running under a shell with job
1068 control (Emacs would never be run as part of a pipeline).
1069 Everything is fine.
1070
1071 If Emacs was not in its own process group, then we know we're
1072 running under a shell (or a caller) that doesn't know how to
1073 separate itself from Emacs (like sh). Emacs must be in its own
1074 process group in order to receive SIGIO correctly. In this
1075 situation, we put ourselves in our own pgroup, forcibly set the
1076 tty's pgroup to our pgroup, and make sure to restore and reinstate
1077 the tty's pgroup just like any other terminal setting. If
1078 inherited_group was not the tty's pgroup, then we'll get a
1079 SIGTTmumble when we try to change the tty's pgroup, and a CONT if
1080 it goes foreground in the future, which is what should happen. */
1081 int inherited_pgroup;
1082
1083 /* Split off the foreground process group to Emacs alone.
1084 When we are in the foreground, but not started in our own process
1085 group, redirect the TTY to point to our own process group. We need
1086 to be in our own process group to receive SIGIO properly. */
1087 void
1088 narrow_foreground_group ()
1089 {
1090 int me = getpid ();
1091
1092 setpgrp (0, inherited_pgroup);
1093 if (inherited_pgroup != me)
1094 EMACS_SET_TTY_PGRP (input_fd, &me);
1095 setpgrp (0, me);
1096 }
1097
1098 /* Set the tty to our original foreground group. */
1099 void
1100 widen_foreground_group ()
1101 {
1102 if (inherited_pgroup != getpid ())
1103 EMACS_SET_TTY_PGRP (input_fd, &inherited_pgroup);
1104 setpgrp (0, inherited_pgroup);
1105 }
1106
1107 #endif /* BSD_PGRPS */
1108 \f
1109 /* Getting and setting emacs_tty structures. */
1110
1111 /* Set *TC to the parameters associated with the terminal FD.
1112 Return zero if all's well, or -1 if we ran into an error we
1113 couldn't deal with. */
1114 int
1115 emacs_get_tty (fd, settings)
1116 int fd;
1117 struct emacs_tty *settings;
1118 {
1119 /* Retrieve the primary parameters - baud rate, character size, etcetera. */
1120 #ifdef HAVE_TCATTR
1121 /* We have those nifty POSIX tcmumbleattr functions. */
1122 bzero (&settings->main, sizeof (settings->main));
1123 if (tcgetattr (fd, &settings->main) < 0)
1124 return -1;
1125
1126 #else
1127 #ifdef HAVE_TERMIO
1128 /* The SYSV-style interface? */
1129 if (ioctl (fd, TCGETA, &settings->main) < 0)
1130 return -1;
1131
1132 #else
1133 #ifdef VMS
1134 /* Vehemently Monstrous System? :-) */
1135 if (! (SYS$QIOW (0, fd, IO$_SENSEMODE, settings, 0, 0,
1136 &settings->main.class, 12, 0, 0, 0, 0)
1137 & 1))
1138 return -1;
1139
1140 #else
1141 #ifndef DOS_NT
1142 /* I give up - I hope you have the BSD ioctls. */
1143 if (ioctl (fd, TIOCGETP, &settings->main) < 0)
1144 return -1;
1145 #endif /* not DOS_NT */
1146 #endif
1147 #endif
1148 #endif
1149
1150 /* Suivant - Do we have to get struct ltchars data? */
1151 #ifdef HAVE_LTCHARS
1152 if (ioctl (fd, TIOCGLTC, &settings->ltchars) < 0)
1153 return -1;
1154 #endif
1155
1156 /* How about a struct tchars and a wordful of lmode bits? */
1157 #ifdef HAVE_TCHARS
1158 if (ioctl (fd, TIOCGETC, &settings->tchars) < 0
1159 || ioctl (fd, TIOCLGET, &settings->lmode) < 0)
1160 return -1;
1161 #endif
1162
1163 /* We have survived the tempest. */
1164 return 0;
1165 }
1166
1167
1168 /* Set the parameters of the tty on FD according to the contents of
1169 *SETTINGS. If FLUSHP is non-zero, we discard input.
1170 Return 0 if all went well, and -1 if anything failed. */
1171
1172 int
1173 emacs_set_tty (fd, settings, flushp)
1174 int fd;
1175 struct emacs_tty *settings;
1176 int flushp;
1177 {
1178 /* Set the primary parameters - baud rate, character size, etcetera. */
1179 #ifdef HAVE_TCATTR
1180 int i;
1181 /* We have those nifty POSIX tcmumbleattr functions.
1182 William J. Smith <wjs@wiis.wang.com> writes:
1183 "POSIX 1003.1 defines tcsetattr to return success if it was
1184 able to perform any of the requested actions, even if some
1185 of the requested actions could not be performed.
1186 We must read settings back to ensure tty setup properly.
1187 AIX requires this to keep tty from hanging occasionally." */
1188 /* This make sure that we don't loop indefinitely in here. */
1189 for (i = 0 ; i < 10 ; i++)
1190 if (tcsetattr (fd, flushp ? TCSAFLUSH : TCSADRAIN, &settings->main) < 0)
1191 {
1192 if (errno == EINTR)
1193 continue;
1194 else
1195 return -1;
1196 }
1197 else
1198 {
1199 struct termios new;
1200
1201 bzero (&new, sizeof (new));
1202 /* Get the current settings, and see if they're what we asked for. */
1203 tcgetattr (fd, &new);
1204 /* We cannot use memcmp on the whole structure here because under
1205 * aix386 the termios structure has some reserved field that may
1206 * not be filled in.
1207 */
1208 if ( new.c_iflag == settings->main.c_iflag
1209 && new.c_oflag == settings->main.c_oflag
1210 && new.c_cflag == settings->main.c_cflag
1211 && new.c_lflag == settings->main.c_lflag
1212 && memcmp (new.c_cc, settings->main.c_cc, NCCS) == 0)
1213 break;
1214 else
1215 continue;
1216 }
1217
1218 #else
1219 #ifdef HAVE_TERMIO
1220 /* The SYSV-style interface? */
1221 if (ioctl (fd, flushp ? TCSETAF : TCSETAW, &settings->main) < 0)
1222 return -1;
1223
1224 #else
1225 #ifdef VMS
1226 /* Vehemently Monstrous System? :-) */
1227 if (! (SYS$QIOW (0, fd, IO$_SETMODE, &input_iosb, 0, 0,
1228 &settings->main.class, 12, 0, 0, 0, 0)
1229 & 1))
1230 return -1;
1231
1232 #else
1233 #ifndef DOS_NT
1234 /* I give up - I hope you have the BSD ioctls. */
1235 if (ioctl (fd, (flushp) ? TIOCSETP : TIOCSETN, &settings->main) < 0)
1236 return -1;
1237 #endif /* not DOS_NT */
1238
1239 #endif
1240 #endif
1241 #endif
1242
1243 /* Suivant - Do we have to get struct ltchars data? */
1244 #ifdef HAVE_LTCHARS
1245 if (ioctl (fd, TIOCSLTC, &settings->ltchars) < 0)
1246 return -1;
1247 #endif
1248
1249 /* How about a struct tchars and a wordful of lmode bits? */
1250 #ifdef HAVE_TCHARS
1251 if (ioctl (fd, TIOCSETC, &settings->tchars) < 0
1252 || ioctl (fd, TIOCLSET, &settings->lmode) < 0)
1253 return -1;
1254 #endif
1255
1256 /* We have survived the tempest. */
1257 return 0;
1258 }
1259
1260 \f
1261 /* The initial tty mode bits */
1262 struct emacs_tty old_tty;
1263
1264 /* 1 if we have been through init_sys_modes. */
1265 int term_initted;
1266
1267 /* 1 if outer tty status has been recorded. */
1268 int old_tty_valid;
1269
1270 #ifdef BSD4_1
1271 /* BSD 4.1 needs to keep track of the lmode bits in order to start
1272 sigio. */
1273 int lmode;
1274 #endif
1275
1276 #ifndef F_SETOWN_BUG
1277 #ifdef F_SETOWN
1278 int old_fcntl_owner;
1279 #endif /* F_SETOWN */
1280 #endif /* F_SETOWN_BUG */
1281
1282 /* This may also be defined in stdio,
1283 but if so, this does no harm,
1284 and using the same name avoids wasting the other one's space. */
1285
1286 #ifdef nec_ews_svr4
1287 extern char *_sobuf ;
1288 #else
1289 #if defined (USG) || defined (DGUX)
1290 unsigned char _sobuf[BUFSIZ+8];
1291 #else
1292 char _sobuf[BUFSIZ];
1293 #endif
1294 #endif
1295
1296 #ifdef HAVE_LTCHARS
1297 static struct ltchars new_ltchars = {-1,-1,-1,-1,-1,-1};
1298 #endif
1299 #ifdef HAVE_TCHARS
1300 static struct tchars new_tchars = {-1,-1,-1,-1,-1,-1};
1301 #endif
1302
1303 void
1304 init_sys_modes ()
1305 {
1306 struct emacs_tty tty;
1307
1308 #ifdef MAC_OS8
1309 /* cus-start.el complains if delete-exited-processes is not defined */
1310 #ifndef subprocesses
1311 DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes,
1312 doc: /* *Non-nil means delete processes immediately when they exit.
1313 nil means don't delete them until `list-processes' is run. */);
1314 delete_exited_processes = 0;
1315 #endif
1316 #endif /* MAC_OS8 */
1317
1318 #ifdef VMS
1319 #if 0
1320 static int oob_chars[2] = {0, 1 << 7}; /* catch C-g's */
1321 extern int (*interrupt_signal) ();
1322 #endif
1323 #endif
1324
1325 Vtty_erase_char = Qnil;
1326
1327 if (noninteractive)
1328 return;
1329
1330 #ifdef VMS
1331 if (!input_ef)
1332 input_ef = get_kbd_event_flag ();
1333 /* LIB$GET_EF (&input_ef); */
1334 SYS$CLREF (input_ef);
1335 waiting_for_ast = 0;
1336 if (!timer_ef)
1337 timer_ef = get_timer_event_flag ();
1338 /* LIB$GET_EF (&timer_ef); */
1339 SYS$CLREF (timer_ef);
1340 #if 0
1341 if (!process_ef)
1342 {
1343 LIB$GET_EF (&process_ef);
1344 SYS$CLREF (process_ef);
1345 }
1346 if (input_ef / 32 != process_ef / 32)
1347 croak ("Input and process event flags in different clusters.");
1348 #endif
1349 if (input_ef / 32 != timer_ef / 32)
1350 croak ("Input and timer event flags in different clusters.");
1351 #if 0
1352 input_eflist = ((unsigned) 1 << (input_ef % 32)) |
1353 ((unsigned) 1 << (process_ef % 32));
1354 #endif
1355 timer_eflist = ((unsigned) 1 << (input_ef % 32)) |
1356 ((unsigned) 1 << (timer_ef % 32));
1357 #ifndef VMS4_4
1358 sys_access_reinit ();
1359 #endif
1360 #endif /* not VMS */
1361
1362 #ifdef BSD_PGRPS
1363 if (! read_socket_hook && EQ (Vwindow_system, Qnil))
1364 narrow_foreground_group ();
1365 #endif
1366
1367 #ifdef HAVE_WINDOW_SYSTEM
1368 /* Emacs' window system on MSDOG uses the `internal terminal' and therefore
1369 needs the initialization code below. */
1370 if (!read_socket_hook && EQ (Vwindow_system, Qnil))
1371 #endif
1372 {
1373 EMACS_GET_TTY (input_fd, &old_tty);
1374
1375 old_tty_valid = 1;
1376
1377 tty = old_tty;
1378
1379 #if defined (HAVE_TERMIO) || defined (HAVE_TERMIOS)
1380 XSETINT (Vtty_erase_char, old_tty.main.c_cc[VERASE]);
1381
1382 #ifdef DGUX
1383 /* This allows meta to be sent on 8th bit. */
1384 tty.main.c_iflag &= ~INPCK; /* don't check input for parity */
1385 #endif
1386 tty.main.c_iflag |= (IGNBRK); /* Ignore break condition */
1387 tty.main.c_iflag &= ~ICRNL; /* Disable map of CR to NL on input */
1388 #ifdef INLCR /* I'm just being cautious,
1389 since I can't check how widespread INLCR is--rms. */
1390 tty.main.c_iflag &= ~INLCR; /* Disable map of NL to CR on input */
1391 #endif
1392 #ifdef ISTRIP
1393 tty.main.c_iflag &= ~ISTRIP; /* don't strip 8th bit on input */
1394 #endif
1395 tty.main.c_lflag &= ~ECHO; /* Disable echo */
1396 tty.main.c_lflag &= ~ICANON; /* Disable erase/kill processing */
1397 #ifdef IEXTEN
1398 tty.main.c_lflag &= ~IEXTEN; /* Disable other editing characters. */
1399 #endif
1400 tty.main.c_lflag |= ISIG; /* Enable signals */
1401 if (flow_control)
1402 {
1403 tty.main.c_iflag |= IXON; /* Enable start/stop output control */
1404 #ifdef IXANY
1405 tty.main.c_iflag &= ~IXANY;
1406 #endif /* IXANY */
1407 }
1408 else
1409 tty.main.c_iflag &= ~IXON; /* Disable start/stop output control */
1410 tty.main.c_oflag &= ~ONLCR; /* Disable map of NL to CR-NL
1411 on output */
1412 tty.main.c_oflag &= ~TAB3; /* Disable tab expansion */
1413 #ifdef CS8
1414 if (meta_key)
1415 {
1416 tty.main.c_cflag |= CS8; /* allow 8th bit on input */
1417 tty.main.c_cflag &= ~PARENB;/* Don't check parity */
1418 }
1419 #endif
1420 tty.main.c_cc[VINTR] = quit_char; /* C-g (usually) gives SIGINT */
1421 /* Set up C-g for both SIGQUIT and SIGINT.
1422 We don't know which we will get, but we handle both alike
1423 so which one it really gives us does not matter. */
1424 tty.main.c_cc[VQUIT] = quit_char;
1425 tty.main.c_cc[VMIN] = 1; /* Input should wait for at least 1 char */
1426 tty.main.c_cc[VTIME] = 0; /* no matter how long that takes. */
1427 #ifdef VSWTCH
1428 tty.main.c_cc[VSWTCH] = CDISABLE; /* Turn off shell layering use
1429 of C-z */
1430 #endif /* VSWTCH */
1431
1432 #if defined (mips) || defined (HAVE_TCATTR)
1433 #ifdef VSUSP
1434 tty.main.c_cc[VSUSP] = CDISABLE; /* Turn off mips handling of C-z. */
1435 #endif /* VSUSP */
1436 #ifdef V_DSUSP
1437 tty.main.c_cc[V_DSUSP] = CDISABLE; /* Turn off mips handling of C-y. */
1438 #endif /* V_DSUSP */
1439 #ifdef VDSUSP /* Some systems have VDSUSP, some have V_DSUSP. */
1440 tty.main.c_cc[VDSUSP] = CDISABLE;
1441 #endif /* VDSUSP */
1442 #ifdef VLNEXT
1443 tty.main.c_cc[VLNEXT] = CDISABLE;
1444 #endif /* VLNEXT */
1445 #ifdef VREPRINT
1446 tty.main.c_cc[VREPRINT] = CDISABLE;
1447 #endif /* VREPRINT */
1448 #ifdef VWERASE
1449 tty.main.c_cc[VWERASE] = CDISABLE;
1450 #endif /* VWERASE */
1451 #ifdef VDISCARD
1452 tty.main.c_cc[VDISCARD] = CDISABLE;
1453 #endif /* VDISCARD */
1454
1455 if (flow_control)
1456 {
1457 #ifdef VSTART
1458 tty.main.c_cc[VSTART] = '\021';
1459 #endif /* VSTART */
1460 #ifdef VSTOP
1461 tty.main.c_cc[VSTOP] = '\023';
1462 #endif /* VSTOP */
1463 }
1464 else
1465 {
1466 #ifdef VSTART
1467 tty.main.c_cc[VSTART] = CDISABLE;
1468 #endif /* VSTART */
1469 #ifdef VSTOP
1470 tty.main.c_cc[VSTOP] = CDISABLE;
1471 #endif /* VSTOP */
1472 }
1473 #endif /* mips or HAVE_TCATTR */
1474
1475 #ifdef SET_LINE_DISCIPLINE
1476 /* Need to explicitly request TERMIODISC line discipline or
1477 Ultrix's termios does not work correctly. */
1478 tty.main.c_line = SET_LINE_DISCIPLINE;
1479 #endif
1480 #ifdef AIX
1481 #ifndef IBMR2AIX
1482 /* AIX enhanced edit loses NULs, so disable it. */
1483 tty.main.c_line = 0;
1484 tty.main.c_iflag &= ~ASCEDIT;
1485 #else
1486 tty.main.c_cc[VSTRT] = 255;
1487 tty.main.c_cc[VSTOP] = 255;
1488 tty.main.c_cc[VSUSP] = 255;
1489 tty.main.c_cc[VDSUSP] = 255;
1490 #endif /* IBMR2AIX */
1491 if (flow_control)
1492 {
1493 #ifdef VSTART
1494 tty.main.c_cc[VSTART] = '\021';
1495 #endif /* VSTART */
1496 #ifdef VSTOP
1497 tty.main.c_cc[VSTOP] = '\023';
1498 #endif /* VSTOP */
1499 }
1500 /* Also, PTY overloads NUL and BREAK.
1501 don't ignore break, but don't signal either, so it looks like NUL.
1502 This really serves a purpose only if running in an XTERM window
1503 or via TELNET or the like, but does no harm elsewhere. */
1504 tty.main.c_iflag &= ~IGNBRK;
1505 tty.main.c_iflag &= ~BRKINT;
1506 #endif
1507 #else /* if not HAVE_TERMIO */
1508 #ifdef VMS
1509 tty.main.tt_char |= TT$M_NOECHO;
1510 if (meta_key)
1511 tty.main.tt_char |= TT$M_EIGHTBIT;
1512 if (flow_control)
1513 tty.main.tt_char |= TT$M_TTSYNC;
1514 else
1515 tty.main.tt_char &= ~TT$M_TTSYNC;
1516 tty.main.tt2_char |= TT2$M_PASTHRU | TT2$M_XON;
1517 #else /* not VMS (BSD, that is) */
1518 #ifndef DOS_NT
1519 XSETINT (Vtty_erase_char, tty.main.sg_erase);
1520 tty.main.sg_flags &= ~(ECHO | CRMOD | XTABS);
1521 if (meta_key)
1522 tty.main.sg_flags |= ANYP;
1523 tty.main.sg_flags |= interrupt_input ? RAW : CBREAK;
1524 #endif /* not DOS_NT */
1525 #endif /* not VMS (BSD, that is) */
1526 #endif /* not HAVE_TERMIO */
1527
1528 /* If going to use CBREAK mode, we must request C-g to interrupt
1529 and turn off start and stop chars, etc. If not going to use
1530 CBREAK mode, do this anyway so as to turn off local flow
1531 control for user coming over network on 4.2; in this case,
1532 only t_stopc and t_startc really matter. */
1533 #ifndef HAVE_TERMIO
1534 #ifdef HAVE_TCHARS
1535 /* Note: if not using CBREAK mode, it makes no difference how we
1536 set this */
1537 tty.tchars = new_tchars;
1538 tty.tchars.t_intrc = quit_char;
1539 if (flow_control)
1540 {
1541 tty.tchars.t_startc = '\021';
1542 tty.tchars.t_stopc = '\023';
1543 }
1544
1545 tty.lmode = LDECCTQ | LLITOUT | LPASS8 | LNOFLSH | old_tty.lmode;
1546 #ifdef ultrix
1547 /* Under Ultrix 4.2a, leaving this out doesn't seem to hurt
1548 anything, and leaving it in breaks the meta key. Go figure. */
1549 tty.lmode &= ~LLITOUT;
1550 #endif
1551
1552 #ifdef BSD4_1
1553 lmode = tty.lmode;
1554 #endif
1555
1556 #endif /* HAVE_TCHARS */
1557 #endif /* not HAVE_TERMIO */
1558
1559 #ifdef HAVE_LTCHARS
1560 tty.ltchars = new_ltchars;
1561 #endif /* HAVE_LTCHARS */
1562 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida, MW Aug 1993 */
1563 if (!term_initted)
1564 internal_terminal_init ();
1565 dos_ttraw ();
1566 #endif
1567
1568 EMACS_SET_TTY (input_fd, &tty, 0);
1569
1570 /* This code added to insure that, if flow-control is not to be used,
1571 we have an unlocked terminal at the start. */
1572
1573 #ifdef TCXONC
1574 if (!flow_control) ioctl (input_fd, TCXONC, 1);
1575 #endif
1576 #ifndef APOLLO
1577 #ifdef TIOCSTART
1578 if (!flow_control) ioctl (input_fd, TIOCSTART, 0);
1579 #endif
1580 #endif
1581
1582 #if defined (HAVE_TERMIOS) || defined (HPUX9)
1583 #ifdef TCOON
1584 if (!flow_control) tcflow (input_fd, TCOON);
1585 #endif
1586 #endif
1587
1588 #ifdef AIXHFT
1589 hft_init ();
1590 #ifdef IBMR2AIX
1591 {
1592 /* IBM's HFT device usually thinks a ^J should be LF/CR. We need it
1593 to be only LF. This is the way that is done. */
1594 struct termio tty;
1595
1596 if (ioctl (1, HFTGETID, &tty) != -1)
1597 write (1, "\033[20l", 5);
1598 }
1599 #endif
1600 #endif /* AIXHFT */
1601
1602 #ifdef VMS
1603 /* Appears to do nothing when in PASTHRU mode.
1604 SYS$QIOW (0, input_fd, IO$_SETMODE|IO$M_OUTBAND, 0, 0, 0,
1605 interrupt_signal, oob_chars, 0, 0, 0, 0);
1606 */
1607 queue_kbd_input (0);
1608 #endif /* VMS */
1609 }
1610
1611 #ifdef F_SETFL
1612 #ifndef F_SETOWN_BUG
1613 #ifdef F_GETOWN /* F_SETFL does not imply existence of F_GETOWN */
1614 if (interrupt_input
1615 && ! read_socket_hook && EQ (Vwindow_system, Qnil))
1616 {
1617 old_fcntl_owner = fcntl (input_fd, F_GETOWN, 0);
1618 fcntl (input_fd, F_SETOWN, getpid ());
1619 init_sigio (input_fd);
1620 }
1621 #endif /* F_GETOWN */
1622 #endif /* F_SETOWN_BUG */
1623 #endif /* F_SETFL */
1624
1625 #ifdef BSD4_1
1626 if (interrupt_input)
1627 init_sigio (input_fd);
1628 #endif
1629
1630 #ifdef VMS /* VMS sometimes has this symbol but lacks setvbuf. */
1631 #undef _IOFBF
1632 #endif
1633 #ifdef _IOFBF
1634 /* This symbol is defined on recent USG systems.
1635 Someone says without this call USG won't really buffer the file
1636 even with a call to setbuf. */
1637 setvbuf (stdout, (char *) _sobuf, _IOFBF, sizeof _sobuf);
1638 #else
1639 setbuf (stdout, (char *) _sobuf);
1640 #endif
1641 #ifdef HAVE_WINDOW_SYSTEM
1642 /* Emacs' window system on MSDOG uses the `internal terminal' and therefore
1643 needs the initialization code below. */
1644 if (EQ (Vwindow_system, Qnil)
1645 #ifndef WINDOWSNT
1646 /* When running in tty mode on NT/Win95, we have a read_socket
1647 hook, but still need the rest of the initialization code below. */
1648 && (! read_socket_hook)
1649 #endif
1650 )
1651 #endif
1652 set_terminal_modes ();
1653
1654 if (!term_initted
1655 && FRAMEP (Vterminal_frame)
1656 && FRAME_TERMCAP_P (XFRAME (Vterminal_frame)))
1657 init_frame_faces (XFRAME (Vterminal_frame));
1658
1659 if (term_initted && no_redraw_on_reenter)
1660 {
1661 if (display_completed)
1662 direct_output_forward_char (0);
1663 }
1664 else
1665 {
1666 frame_garbaged = 1;
1667 if (FRAMEP (Vterminal_frame))
1668 FRAME_GARBAGED_P (XFRAME (Vterminal_frame)) = 1;
1669 }
1670
1671 term_initted = 1;
1672 }
1673
1674 /* Return nonzero if safe to use tabs in output.
1675 At the time this is called, init_sys_modes has not been done yet. */
1676
1677 int
1678 tabs_safe_p ()
1679 {
1680 struct emacs_tty tty;
1681
1682 EMACS_GET_TTY (input_fd, &tty);
1683 return EMACS_TTY_TABS_OK (&tty);
1684 }
1685 \f
1686 /* Get terminal size from system.
1687 Store number of lines into *HEIGHTP and width into *WIDTHP.
1688 We store 0 if there's no valid information. */
1689
1690 void
1691 get_frame_size (widthp, heightp)
1692 int *widthp, *heightp;
1693 {
1694
1695 #ifdef TIOCGWINSZ
1696
1697 /* BSD-style. */
1698 struct winsize size;
1699
1700 if (ioctl (input_fd, TIOCGWINSZ, &size) == -1)
1701 *widthp = *heightp = 0;
1702 else
1703 {
1704 *widthp = size.ws_col;
1705 *heightp = size.ws_row;
1706 }
1707
1708 #else
1709 #ifdef TIOCGSIZE
1710
1711 /* SunOS - style. */
1712 struct ttysize size;
1713
1714 if (ioctl (input_fd, TIOCGSIZE, &size) == -1)
1715 *widthp = *heightp = 0;
1716 else
1717 {
1718 *widthp = size.ts_cols;
1719 *heightp = size.ts_lines;
1720 }
1721
1722 #else
1723 #ifdef VMS
1724
1725 struct sensemode tty;
1726
1727 SYS$QIOW (0, input_fd, IO$_SENSEMODE, &tty, 0, 0,
1728 &tty.class, 12, 0, 0, 0, 0);
1729 *widthp = tty.scr_wid;
1730 *heightp = tty.scr_len;
1731
1732 #else
1733 #ifdef MSDOS
1734 *widthp = ScreenCols ();
1735 *heightp = ScreenRows ();
1736 #else /* system doesn't know size */
1737 *widthp = 0;
1738 *heightp = 0;
1739 #endif
1740
1741 #endif /* not VMS */
1742 #endif /* not SunOS-style */
1743 #endif /* not BSD-style */
1744 }
1745
1746 /* Set the logical window size associated with descriptor FD
1747 to HEIGHT and WIDTH. This is used mainly with ptys. */
1748
1749 int
1750 set_window_size (fd, height, width)
1751 int fd, height, width;
1752 {
1753 #ifdef TIOCSWINSZ
1754
1755 /* BSD-style. */
1756 struct winsize size;
1757 size.ws_row = height;
1758 size.ws_col = width;
1759
1760 if (ioctl (fd, TIOCSWINSZ, &size) == -1)
1761 return 0; /* error */
1762 else
1763 return 1;
1764
1765 #else
1766 #ifdef TIOCSSIZE
1767
1768 /* SunOS - style. */
1769 struct ttysize size;
1770 size.ts_lines = height;
1771 size.ts_cols = width;
1772
1773 if (ioctl (fd, TIOCGSIZE, &size) == -1)
1774 return 0;
1775 else
1776 return 1;
1777 #else
1778 return -1;
1779 #endif /* not SunOS-style */
1780 #endif /* not BSD-style */
1781 }
1782
1783 \f
1784 /* Prepare the terminal for exiting Emacs; move the cursor to the
1785 bottom of the frame, turn off interrupt-driven I/O, etc. */
1786 void
1787 reset_sys_modes ()
1788 {
1789 struct frame *sf;
1790
1791 if (noninteractive)
1792 {
1793 fflush (stdout);
1794 return;
1795 }
1796 if (!term_initted)
1797 return;
1798 #ifdef HAVE_WINDOW_SYSTEM
1799 /* Emacs' window system on MSDOG uses the `internal terminal' and therefore
1800 needs the clean-up code below. */
1801 if (!EQ (Vwindow_system, Qnil)
1802 #ifndef WINDOWSNT
1803 /* When running in tty mode on NT/Win95, we have a read_socket
1804 hook, but still need the rest of the clean-up code below. */
1805 || read_socket_hook
1806 #endif
1807 )
1808 return;
1809 #endif
1810 sf = SELECTED_FRAME ();
1811 cursor_to (FRAME_HEIGHT (sf) - 1, 0);
1812 clear_end_of_line (FRAME_WIDTH (sf));
1813 /* clear_end_of_line may move the cursor */
1814 cursor_to (FRAME_HEIGHT (sf) - 1, 0);
1815 #if defined (IBMR2AIX) && defined (AIXHFT)
1816 {
1817 /* HFT devices normally use ^J as a LF/CR. We forced it to
1818 do the LF only. Now, we need to reset it. */
1819 struct termio tty;
1820
1821 if (ioctl (1, HFTGETID, &tty) != -1)
1822 write (1, "\033[20h", 5);
1823 }
1824 #endif
1825
1826 reset_terminal_modes ();
1827 fflush (stdout);
1828 #ifdef BSD_SYSTEM
1829 #ifndef BSD4_1
1830 /* Avoid possible loss of output when changing terminal modes. */
1831 fsync (fileno (stdout));
1832 #endif
1833 #endif
1834
1835 #ifdef F_SETFL
1836 #ifndef F_SETOWN_BUG
1837 #ifdef F_SETOWN /* F_SETFL does not imply existence of F_SETOWN */
1838 if (interrupt_input)
1839 {
1840 reset_sigio ();
1841 fcntl (input_fd, F_SETOWN, old_fcntl_owner);
1842 }
1843 #endif /* F_SETOWN */
1844 #endif /* F_SETOWN_BUG */
1845 #ifdef O_NDELAY
1846 fcntl (input_fd, F_SETFL, fcntl (input_fd, F_GETFL, 0) & ~O_NDELAY);
1847 #endif
1848 #endif /* F_SETFL */
1849 #ifdef BSD4_1
1850 if (interrupt_input)
1851 reset_sigio ();
1852 #endif /* BSD4_1 */
1853
1854 if (old_tty_valid)
1855 while (EMACS_SET_TTY (input_fd, &old_tty, 0) < 0 && errno == EINTR)
1856 ;
1857
1858 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */
1859 dos_ttcooked ();
1860 #endif
1861
1862 #ifdef SET_LINE_DISCIPLINE
1863 /* Ultrix's termios *ignores* any line discipline except TERMIODISC.
1864 A different old line discipline is therefore not restored, yet.
1865 Restore the old line discipline by hand. */
1866 ioctl (0, TIOCSETD, &old_tty.main.c_line);
1867 #endif
1868
1869 #ifdef AIXHFT
1870 hft_reset ();
1871 #endif
1872
1873 #ifdef BSD_PGRPS
1874 widen_foreground_group ();
1875 #endif
1876 }
1877 \f
1878 #ifdef HAVE_PTYS
1879
1880 /* Set up the proper status flags for use of a pty. */
1881
1882 void
1883 setup_pty (fd)
1884 int fd;
1885 {
1886 /* I'm told that TOICREMOTE does not mean control chars
1887 "can't be sent" but rather that they don't have
1888 input-editing or signaling effects.
1889 That should be good, because we have other ways
1890 to do those things in Emacs.
1891 However, telnet mode seems not to work on 4.2.
1892 So TIOCREMOTE is turned off now. */
1893
1894 /* Under hp-ux, if TIOCREMOTE is turned on, some calls
1895 will hang. In particular, the "timeout" feature (which
1896 causes a read to return if there is no data available)
1897 does this. Also it is known that telnet mode will hang
1898 in such a way that Emacs must be stopped (perhaps this
1899 is the same problem).
1900
1901 If TIOCREMOTE is turned off, then there is a bug in
1902 hp-ux which sometimes loses data. Apparently the
1903 code which blocks the master process when the internal
1904 buffer fills up does not work. Other than this,
1905 though, everything else seems to work fine.
1906
1907 Since the latter lossage is more benign, we may as well
1908 lose that way. -- cph */
1909 #ifdef FIONBIO
1910 #if defined(SYSV_PTYS) || defined(UNIX98_PTYS)
1911 {
1912 int on = 1;
1913 ioctl (fd, FIONBIO, &on);
1914 }
1915 #endif
1916 #endif
1917 #ifdef IBMRTAIX
1918 /* On AIX, the parent gets SIGHUP when a pty attached child dies. So, we */
1919 /* ignore SIGHUP once we've started a child on a pty. Note that this may */
1920 /* cause EMACS not to die when it should, i.e., when its own controlling */
1921 /* tty goes away. I've complained to the AIX developers, and they may */
1922 /* change this behavior, but I'm not going to hold my breath. */
1923 signal (SIGHUP, SIG_IGN);
1924 #endif
1925 }
1926 #endif /* HAVE_PTYS */
1927 \f
1928 #ifdef VMS
1929
1930 /* Assigning an input channel is done at the start of Emacs execution.
1931 This is called each time Emacs is resumed, also, but does nothing
1932 because input_chain is no longer zero. */
1933
1934 void
1935 init_vms_input ()
1936 {
1937 int status;
1938
1939 if (input_fd == 0)
1940 {
1941 status = SYS$ASSIGN (&input_dsc, &input_fd, 0, 0);
1942 if (! (status & 1))
1943 LIB$STOP (status);
1944 }
1945 }
1946
1947 /* Deassigning the input channel is done before exiting. */
1948
1949 void
1950 stop_vms_input ()
1951 {
1952 return SYS$DASSGN (input_fd);
1953 }
1954
1955 short input_buffer;
1956
1957 /* Request reading one character into the keyboard buffer.
1958 This is done as soon as the buffer becomes empty. */
1959
1960 void
1961 queue_kbd_input ()
1962 {
1963 int status;
1964 extern kbd_input_ast ();
1965
1966 waiting_for_ast = 0;
1967 stop_input = 0;
1968 status = SYS$QIO (0, input_fd, IO$_READVBLK,
1969 &input_iosb, kbd_input_ast, 1,
1970 &input_buffer, 1, 0, terminator_mask, 0, 0);
1971 }
1972
1973 int input_count;
1974
1975 /* Ast routine that is called when keyboard input comes in
1976 in accord with the SYS$QIO above. */
1977
1978 void
1979 kbd_input_ast ()
1980 {
1981 register int c = -1;
1982 int old_errno = errno;
1983 extern EMACS_TIME *input_available_clear_time;
1984
1985 if (waiting_for_ast)
1986 SYS$SETEF (input_ef);
1987 waiting_for_ast = 0;
1988 input_count++;
1989 #ifdef ASTDEBUG
1990 if (input_count == 25)
1991 exit (1);
1992 printf ("Ast # %d,", input_count);
1993 printf (" iosb = %x, %x, %x, %x",
1994 input_iosb.offset, input_iosb.status, input_iosb.termlen,
1995 input_iosb.term);
1996 #endif
1997 if (input_iosb.offset)
1998 {
1999 c = input_buffer;
2000 #ifdef ASTDEBUG
2001 printf (", char = 0%o", c);
2002 #endif
2003 }
2004 #ifdef ASTDEBUG
2005 printf ("\n");
2006 fflush (stdout);
2007 sleep (1);
2008 #endif
2009 if (! stop_input)
2010 queue_kbd_input ();
2011 if (c >= 0)
2012 {
2013 struct input_event e;
2014 e.kind = ascii_keystroke;
2015 XSETINT (e.code, c);
2016 e.frame_or_window = selected_frame;
2017 kbd_buffer_store_event (&e);
2018 }
2019 if (input_available_clear_time)
2020 EMACS_SET_SECS_USECS (*input_available_clear_time, 0, 0);
2021 errno = old_errno;
2022 }
2023
2024 /* Wait until there is something in kbd_buffer. */
2025
2026 void
2027 wait_for_kbd_input ()
2028 {
2029 extern int have_process_input, process_exited;
2030
2031 /* If already something, avoid doing system calls. */
2032 if (detect_input_pending ())
2033 {
2034 return;
2035 }
2036 /* Clear a flag, and tell ast routine above to set it. */
2037 SYS$CLREF (input_ef);
2038 waiting_for_ast = 1;
2039 /* Check for timing error: ast happened while we were doing that. */
2040 if (!detect_input_pending ())
2041 {
2042 /* No timing error: wait for flag to be set. */
2043 set_waiting_for_input (0);
2044 SYS$WFLOR (input_ef, input_eflist);
2045 clear_waiting_for_input ();
2046 if (!detect_input_pending ())
2047 /* Check for subprocess input availability */
2048 {
2049 int dsp = have_process_input || process_exited;
2050
2051 SYS$CLREF (process_ef);
2052 if (have_process_input)
2053 process_command_input ();
2054 if (process_exited)
2055 process_exit ();
2056 if (dsp)
2057 {
2058 update_mode_lines++;
2059 prepare_menu_bars ();
2060 redisplay_preserve_echo_area (18);
2061 }
2062 }
2063 }
2064 waiting_for_ast = 0;
2065 }
2066
2067 /* Get rid of any pending QIO, when we are about to suspend
2068 or when we want to throw away pending input.
2069 We wait for a positive sign that the AST routine has run
2070 and therefore there is no I/O request queued when we return.
2071 SYS$SETAST is used to avoid a timing error. */
2072
2073 void
2074 end_kbd_input ()
2075 {
2076 #ifdef ASTDEBUG
2077 printf ("At end_kbd_input.\n");
2078 fflush (stdout);
2079 sleep (1);
2080 #endif
2081 if (LIB$AST_IN_PROG ()) /* Don't wait if suspending from kbd_buffer_store_event! */
2082 {
2083 SYS$CANCEL (input_fd);
2084 return;
2085 }
2086
2087 SYS$SETAST (0);
2088 /* Clear a flag, and tell ast routine above to set it. */
2089 SYS$CLREF (input_ef);
2090 waiting_for_ast = 1;
2091 stop_input = 1;
2092 SYS$CANCEL (input_fd);
2093 SYS$SETAST (1);
2094 SYS$WAITFR (input_ef);
2095 waiting_for_ast = 0;
2096 }
2097
2098 /* Wait for either input available or time interval expiry. */
2099
2100 void
2101 input_wait_timeout (timeval)
2102 int timeval; /* Time to wait, in seconds */
2103 {
2104 int time [2];
2105 static int zero = 0;
2106 static int large = -10000000;
2107
2108 LIB$EMUL (&timeval, &large, &zero, time); /* Convert to VMS format */
2109
2110 /* If already something, avoid doing system calls. */
2111 if (detect_input_pending ())
2112 {
2113 return;
2114 }
2115 /* Clear a flag, and tell ast routine above to set it. */
2116 SYS$CLREF (input_ef);
2117 waiting_for_ast = 1;
2118 /* Check for timing error: ast happened while we were doing that. */
2119 if (!detect_input_pending ())
2120 {
2121 /* No timing error: wait for flag to be set. */
2122 SYS$CANTIM (1, 0);
2123 if (SYS$SETIMR (timer_ef, time, 0, 1) & 1) /* Set timer */
2124 SYS$WFLOR (timer_ef, timer_eflist); /* Wait for timer expiry or input */
2125 }
2126 waiting_for_ast = 0;
2127 }
2128
2129 /* The standard `sleep' routine works some other way
2130 and it stops working if you have ever quit out of it.
2131 This one continues to work. */
2132
2133 sys_sleep (timeval)
2134 int timeval;
2135 {
2136 int time [2];
2137 static int zero = 0;
2138 static int large = -10000000;
2139
2140 LIB$EMUL (&timeval, &large, &zero, time); /* Convert to VMS format */
2141
2142 SYS$CANTIM (1, 0);
2143 if (SYS$SETIMR (timer_ef, time, 0, 1) & 1) /* Set timer */
2144 SYS$WAITFR (timer_ef); /* Wait for timer expiry only */
2145 }
2146
2147 void
2148 init_sigio (fd)
2149 int fd;
2150 {
2151 request_sigio ();
2152 }
2153
2154 reset_sigio ()
2155 {
2156 unrequest_sigio ();
2157 }
2158
2159 void
2160 request_sigio ()
2161 {
2162 croak ("request sigio");
2163 }
2164
2165 void
2166 unrequest_sigio ()
2167 {
2168 croak ("unrequest sigio");
2169 }
2170
2171 #endif /* VMS */
2172 \f
2173 /* Note that VMS compiler won't accept defined (CANNOT_DUMP). */
2174 #ifndef CANNOT_DUMP
2175 #define NEED_STARTS
2176 #endif
2177
2178 #ifndef SYSTEM_MALLOC
2179 #ifndef NEED_STARTS
2180 #define NEED_STARTS
2181 #endif
2182 #endif
2183
2184 #ifdef NEED_STARTS
2185 /* Some systems that cannot dump also cannot implement these. */
2186
2187 /*
2188 * Return the address of the start of the text segment prior to
2189 * doing an unexec. After unexec the return value is undefined.
2190 * See crt0.c for further explanation and _start.
2191 *
2192 */
2193
2194 #if !(defined (__NetBSD__) && defined (__ELF__))
2195 #ifndef HAVE_TEXT_START
2196 char *
2197 start_of_text ()
2198 {
2199 #ifdef TEXT_START
2200 return ((char *) TEXT_START);
2201 #else
2202 #ifdef GOULD
2203 extern csrt ();
2204 return ((char *) csrt);
2205 #else /* not GOULD */
2206 extern int _start ();
2207 return ((char *) _start);
2208 #endif /* GOULD */
2209 #endif /* TEXT_START */
2210 }
2211 #endif /* not HAVE_TEXT_START */
2212 #endif
2213
2214 /*
2215 * Return the address of the start of the data segment prior to
2216 * doing an unexec. After unexec the return value is undefined.
2217 * See crt0.c for further information and definition of data_start.
2218 *
2219 * Apparently, on BSD systems this is etext at startup. On
2220 * USG systems (swapping) this is highly mmu dependent and
2221 * is also dependent on whether or not the program is running
2222 * with shared text. Generally there is a (possibly large)
2223 * gap between end of text and start of data with shared text.
2224 *
2225 * On Uniplus+ systems with shared text, data starts at a
2226 * fixed address. Each port (from a given oem) is generally
2227 * different, and the specific value of the start of data can
2228 * be obtained via the UniPlus+ specific "uvar" system call,
2229 * however the method outlined in crt0.c seems to be more portable.
2230 *
2231 * Probably what will have to happen when a USG unexec is available,
2232 * at least on UniPlus, is temacs will have to be made unshared so
2233 * that text and data are contiguous. Then once loadup is complete,
2234 * unexec will produce a shared executable where the data can be
2235 * at the normal shared text boundary and the startofdata variable
2236 * will be patched by unexec to the correct value.
2237 *
2238 */
2239
2240 char *
2241 start_of_data ()
2242 {
2243 #ifdef DATA_START
2244 return ((char *) DATA_START);
2245 #else
2246 #ifdef ORDINARY_LINK
2247 /*
2248 * This is a hack. Since we're not linking crt0.c or pre_crt0.c,
2249 * data_start isn't defined. We take the address of environ, which
2250 * is known to live at or near the start of the system crt0.c, and
2251 * we don't sweat the handful of bytes that might lose.
2252 */
2253 extern char **environ;
2254
2255 return ((char *) &environ);
2256 #else
2257 extern int data_start;
2258 return ((char *) &data_start);
2259 #endif /* ORDINARY_LINK */
2260 #endif /* DATA_START */
2261 }
2262 #endif /* NEED_STARTS (not CANNOT_DUMP or not SYSTEM_MALLOC) */
2263
2264 #ifndef CANNOT_DUMP
2265 /* Some systems that cannot dump also cannot implement these. */
2266
2267 /*
2268 * Return the address of the end of the text segment prior to
2269 * doing an unexec. After unexec the return value is undefined.
2270 */
2271
2272 char *
2273 end_of_text ()
2274 {
2275 #ifdef TEXT_END
2276 return ((char *) TEXT_END);
2277 #else
2278 extern int etext;
2279 return ((char *) &etext);
2280 #endif
2281 }
2282
2283 /*
2284 * Return the address of the end of the data segment prior to
2285 * doing an unexec. After unexec the return value is undefined.
2286 */
2287
2288 char *
2289 end_of_data ()
2290 {
2291 #ifdef DATA_END
2292 return ((char *) DATA_END);
2293 #else
2294 extern int edata;
2295 return ((char *) &edata);
2296 #endif
2297 }
2298
2299 #endif /* not CANNOT_DUMP */
2300 \f
2301 /* init_system_name sets up the string for the Lisp function
2302 system-name to return. */
2303
2304 #ifdef BSD4_1
2305 #include <whoami.h>
2306 #endif
2307
2308 extern Lisp_Object Vsystem_name;
2309
2310 #ifndef BSD4_1
2311 #ifndef VMS
2312 #ifdef HAVE_SOCKETS
2313 #include <sys/socket.h>
2314 #include <netdb.h>
2315 #endif /* HAVE_SOCKETS */
2316 #endif /* not VMS */
2317 #endif /* not BSD4_1 */
2318
2319 #ifdef TRY_AGAIN
2320 #ifndef HAVE_H_ERRNO
2321 extern int h_errno;
2322 #endif
2323 #endif /* TRY_AGAIN */
2324
2325 void
2326 init_system_name ()
2327 {
2328 #ifdef BSD4_1
2329 Vsystem_name = build_string (sysname);
2330 #else
2331 #ifdef VMS
2332 char *sp, *end;
2333 if ((sp = egetenv ("SYS$NODE")) == 0)
2334 Vsystem_name = build_string ("vax-vms");
2335 else if ((end = index (sp, ':')) == 0)
2336 Vsystem_name = build_string (sp);
2337 else
2338 Vsystem_name = make_string (sp, end - sp);
2339 #else
2340 #ifndef HAVE_GETHOSTNAME
2341 struct utsname uts;
2342 uname (&uts);
2343 Vsystem_name = build_string (uts.nodename);
2344 #else /* HAVE_GETHOSTNAME */
2345 unsigned int hostname_size = 256;
2346 char *hostname = (char *) alloca (hostname_size);
2347
2348 /* Try to get the host name; if the buffer is too short, try
2349 again. Apparently, the only indication gethostname gives of
2350 whether the buffer was large enough is the presence or absence
2351 of a '\0' in the string. Eech. */
2352 for (;;)
2353 {
2354 gethostname (hostname, hostname_size - 1);
2355 hostname[hostname_size - 1] = '\0';
2356
2357 /* Was the buffer large enough for the '\0'? */
2358 if (strlen (hostname) < hostname_size - 1)
2359 break;
2360
2361 hostname_size <<= 1;
2362 hostname = (char *) alloca (hostname_size);
2363 }
2364 #ifdef HAVE_SOCKETS
2365 /* Turn the hostname into the official, fully-qualified hostname.
2366 Don't do this if we're going to dump; this can confuse system
2367 libraries on some machines and make the dumped emacs core dump. */
2368 #ifndef CANNOT_DUMP
2369 if (initialized)
2370 #endif /* not CANNOT_DUMP */
2371 if (! index (hostname, '.'))
2372 {
2373 struct hostent *hp;
2374 int count;
2375 for (count = 0;; count++)
2376 {
2377 #ifdef TRY_AGAIN
2378 h_errno = 0;
2379 #endif
2380 hp = gethostbyname (hostname);
2381 #ifdef TRY_AGAIN
2382 if (! (hp == 0 && h_errno == TRY_AGAIN))
2383 #endif
2384 break;
2385 if (count >= 5)
2386 break;
2387 Fsleep_for (make_number (1), Qnil);
2388 }
2389 if (hp)
2390 {
2391 char *fqdn = (char *) hp->h_name;
2392 #if 0
2393 char *p;
2394 #endif
2395
2396 if (!index (fqdn, '.'))
2397 {
2398 /* We still don't have a fully qualified domain name.
2399 Try to find one in the list of alternate names */
2400 char **alias = hp->h_aliases;
2401 while (*alias && !index (*alias, '.'))
2402 alias++;
2403 if (*alias)
2404 fqdn = *alias;
2405 }
2406 hostname = fqdn;
2407 #if 0
2408 /* Convert the host name to lower case. */
2409 /* Using ctype.h here would introduce a possible locale
2410 dependence that is probably wrong for hostnames. */
2411 p = hostname;
2412 while (*p)
2413 {
2414 if (*p >= 'A' && *p <= 'Z')
2415 *p += 'a' - 'A';
2416 p++;
2417 }
2418 #endif
2419 }
2420 }
2421 #endif /* HAVE_SOCKETS */
2422 /* We used to try using getdomainname here,
2423 but NIIBE Yutaka <gniibe@etl.go.jp> says that
2424 getdomainname gets the NIS/YP domain which often is not the same
2425 as in Internet domain name. */
2426 #if 0 /* Turned off because sysinfo is not really likely to return the
2427 correct Internet domain. */
2428 #if (HAVE_SYSINFO && defined (SI_SRPC_DOMAIN))
2429 if (! index (hostname, '.'))
2430 {
2431 /* The hostname is not fully qualified. Append the domain name. */
2432
2433 int hostlen = strlen (hostname);
2434 int domain_size = 256;
2435
2436 for (;;)
2437 {
2438 char *domain = (char *) alloca (domain_size + 1);
2439 char *fqdn = (char *) alloca (hostlen + 1 + domain_size + 1);
2440 int sys_domain_size = sysinfo (SI_SRPC_DOMAIN, domain, domain_size);
2441 if (sys_domain_size <= 0)
2442 break;
2443 if (domain_size < sys_domain_size)
2444 {
2445 domain_size = sys_domain_size;
2446 continue;
2447 }
2448 strcpy (fqdn, hostname);
2449 if (domain[0] == '.')
2450 strcpy (fqdn + hostlen, domain);
2451 else if (domain[0] != 0)
2452 {
2453 fqdn[hostlen] = '.';
2454 strcpy (fqdn + hostlen + 1, domain);
2455 }
2456 hostname = fqdn;
2457 break;
2458 }
2459 }
2460 #endif /* HAVE_SYSINFO && defined (SI_SRPC_DOMAIN) */
2461 #endif /* 0 */
2462 Vsystem_name = build_string (hostname);
2463 #endif /* HAVE_GETHOSTNAME */
2464 #endif /* VMS */
2465 #endif /* BSD4_1 */
2466 {
2467 unsigned char *p;
2468 for (p = XSTRING (Vsystem_name)->data; *p; p++)
2469 if (*p == ' ' || *p == '\t')
2470 *p = '-';
2471 }
2472 }
2473 \f
2474 #ifndef MSDOS
2475 #ifndef VMS
2476 #if !defined (HAVE_SELECT) || defined (BROKEN_SELECT_NON_X)
2477
2478 #include "sysselect.h"
2479 #undef select
2480
2481 #if defined (HAVE_X_WINDOWS) && !defined (HAVE_SELECT)
2482 /* Cause explanatory error message at compile time,
2483 since the select emulation is not good enough for X. */
2484 int *x = &x_windows_lose_if_no_select_system_call;
2485 #endif
2486
2487 /* Emulate as much as select as is possible under 4.1 and needed by Gnu Emacs
2488 * Only checks read descriptors.
2489 */
2490 /* How long to wait between checking fds in select */
2491 #define SELECT_PAUSE 1
2492 int select_alarmed;
2493
2494 /* For longjmp'ing back to read_input_waiting. */
2495
2496 jmp_buf read_alarm_throw;
2497
2498 /* Nonzero if the alarm signal should throw back to read_input_waiting.
2499 The read_socket_hook function sets this to 1 while it is waiting. */
2500
2501 int read_alarm_should_throw;
2502
2503 SIGTYPE
2504 select_alarm ()
2505 {
2506 select_alarmed = 1;
2507 #ifdef BSD4_1
2508 sigrelse (SIGALRM);
2509 #else /* not BSD4_1 */
2510 signal (SIGALRM, SIG_IGN);
2511 #endif /* not BSD4_1 */
2512 if (read_alarm_should_throw)
2513 longjmp (read_alarm_throw, 1);
2514 }
2515
2516 #ifndef WINDOWSNT
2517 /* Only rfds are checked. */
2518 int
2519 sys_select (nfds, rfds, wfds, efds, timeout)
2520 int nfds;
2521 SELECT_TYPE *rfds, *wfds, *efds;
2522 EMACS_TIME *timeout;
2523 {
2524 int ravail = 0;
2525 SELECT_TYPE orfds;
2526 int timeoutval;
2527 int *local_timeout;
2528 extern int proc_buffered_char[];
2529 #ifndef subprocesses
2530 int process_tick = 0, update_tick = 0;
2531 #else
2532 extern int process_tick, update_tick;
2533 #endif
2534 unsigned char buf;
2535
2536 #if defined (HAVE_SELECT) && defined (HAVE_X_WINDOWS)
2537 /* If we're using X, then the native select will work; we only need the
2538 emulation for non-X usage. */
2539 if (!NILP (Vwindow_system))
2540 return select (nfds, rfds, wfds, efds, timeout);
2541 #endif
2542 timeoutval = timeout ? EMACS_SECS (*timeout) : 100000;
2543 local_timeout = &timeoutval;
2544 FD_ZERO (&orfds);
2545 if (rfds)
2546 {
2547 orfds = *rfds;
2548 FD_ZERO (rfds);
2549 }
2550 if (wfds)
2551 FD_ZERO (wfds);
2552 if (efds)
2553 FD_ZERO (efds);
2554
2555 /* If we are looking only for the terminal, with no timeout,
2556 just read it and wait -- that's more efficient. */
2557 if (*local_timeout == 100000 && process_tick == update_tick
2558 && FD_ISSET (0, &orfds))
2559 {
2560 int fd;
2561 for (fd = 1; fd < nfds; ++fd)
2562 if (FD_ISSET (fd, &orfds))
2563 goto hardway;
2564 if (! detect_input_pending ())
2565 read_input_waiting ();
2566 FD_SET (0, rfds);
2567 return 1;
2568 }
2569
2570 hardway:
2571 /* Once a second, till the timer expires, check all the flagged read
2572 * descriptors to see if any input is available. If there is some then
2573 * set the corresponding bit in the return copy of rfds.
2574 */
2575 while (1)
2576 {
2577 register int to_check, fd;
2578
2579 if (rfds)
2580 {
2581 for (to_check = nfds, fd = 0; --to_check >= 0; fd++)
2582 {
2583 if (FD_ISSET (fd, &orfds))
2584 {
2585 int avail = 0, status = 0;
2586
2587 if (fd == 0)
2588 avail = detect_input_pending (); /* Special keyboard handler */
2589 else
2590 {
2591 #ifdef FIONREAD
2592 status = ioctl (fd, FIONREAD, &avail);
2593 #else /* no FIONREAD */
2594 /* Hoping it will return -1 if nothing available
2595 or 0 if all 0 chars requested are read. */
2596 if (proc_buffered_char[fd] >= 0)
2597 avail = 1;
2598 else
2599 {
2600 avail = read (fd, &buf, 1);
2601 if (avail > 0)
2602 proc_buffered_char[fd] = buf;
2603 }
2604 #endif /* no FIONREAD */
2605 }
2606 if (status >= 0 && avail > 0)
2607 {
2608 FD_SET (fd, rfds);
2609 ravail++;
2610 }
2611 }
2612 }
2613 }
2614 if (*local_timeout == 0 || ravail != 0 || process_tick != update_tick)
2615 break;
2616
2617 turn_on_atimers (0);
2618 signal (SIGALRM, select_alarm);
2619 select_alarmed = 0;
2620 alarm (SELECT_PAUSE);
2621
2622 /* Wait for a SIGALRM (or maybe a SIGTINT) */
2623 while (select_alarmed == 0 && *local_timeout != 0
2624 && process_tick == update_tick)
2625 {
2626 /* If we are interested in terminal input,
2627 wait by reading the terminal.
2628 That makes instant wakeup for terminal input at least. */
2629 if (FD_ISSET (0, &orfds))
2630 {
2631 read_input_waiting ();
2632 if (detect_input_pending ())
2633 select_alarmed = 1;
2634 }
2635 else
2636 pause ();
2637 }
2638 (*local_timeout) -= SELECT_PAUSE;
2639
2640 /* Reset the old alarm if there was one. */
2641 turn_on_atimers (1);
2642
2643 if (*local_timeout == 0) /* Stop on timer being cleared */
2644 break;
2645 }
2646 return ravail;
2647 }
2648 #endif /* not WINDOWSNT */
2649
2650 /* Read keyboard input into the standard buffer,
2651 waiting for at least one character. */
2652
2653 /* Make all keyboard buffers much bigger when using a window system. */
2654 #ifdef HAVE_WINDOW_SYSTEM
2655 #define BUFFER_SIZE_FACTOR 16
2656 #else
2657 #define BUFFER_SIZE_FACTOR 1
2658 #endif
2659
2660 void
2661 read_input_waiting ()
2662 {
2663 struct input_event e;
2664 int nread, i;
2665 extern int quit_char;
2666
2667 if (read_socket_hook)
2668 {
2669 struct input_event buf[256];
2670
2671 read_alarm_should_throw = 0;
2672 if (! setjmp (read_alarm_throw))
2673 nread = (*read_socket_hook) (0, buf, 256, 1);
2674 else
2675 nread = -1;
2676
2677 /* Scan the chars for C-g and store them in kbd_buffer. */
2678 for (i = 0; i < nread; i++)
2679 {
2680 kbd_buffer_store_event (&buf[i]);
2681 /* Don't look at input that follows a C-g too closely.
2682 This reduces lossage due to autorepeat on C-g. */
2683 if (buf[i].kind == ascii_keystroke
2684 && buf[i].code == quit_char)
2685 break;
2686 }
2687 }
2688 else
2689 {
2690 char buf[3];
2691 nread = read (fileno (stdin), buf, 1);
2692
2693 /* Scan the chars for C-g and store them in kbd_buffer. */
2694 e.kind = ascii_keystroke;
2695 e.frame_or_window = selected_frame;
2696 e.modifiers = 0;
2697 for (i = 0; i < nread; i++)
2698 {
2699 /* Convert chars > 0177 to meta events if desired.
2700 We do this under the same conditions that read_avail_input does. */
2701 if (read_socket_hook == 0)
2702 {
2703 /* If the user says she has a meta key, then believe her. */
2704 if (meta_key == 1 && (buf[i] & 0x80))
2705 e.modifiers = meta_modifier;
2706 if (meta_key != 2)
2707 buf[i] &= ~0x80;
2708 }
2709
2710 XSETINT (e.code, buf[i]);
2711 kbd_buffer_store_event (&e);
2712 /* Don't look at input that follows a C-g too closely.
2713 This reduces lossage due to autorepeat on C-g. */
2714 if (buf[i] == quit_char)
2715 break;
2716 }
2717 }
2718 }
2719
2720 #endif /* not HAVE_SELECT */
2721 #endif /* not VMS */
2722 #endif /* not MSDOS */
2723 \f
2724 #ifdef BSD4_1
2725 void
2726 init_sigio (fd)
2727 int fd;
2728 {
2729 if (noninteractive)
2730 return;
2731 lmode = LINTRUP | lmode;
2732 ioctl (fd, TIOCLSET, &lmode);
2733 }
2734
2735 void
2736 reset_sigio ()
2737 {
2738 if (noninteractive)
2739 return;
2740 lmode = ~LINTRUP & lmode;
2741 ioctl (0, TIOCLSET, &lmode);
2742 }
2743
2744 void
2745 request_sigio ()
2746 {
2747 sigrelse (SIGTINT);
2748
2749 interrupts_deferred = 0;
2750 }
2751
2752 void
2753 unrequest_sigio ()
2754 {
2755 sighold (SIGTINT);
2756
2757 interrupts_deferred = 1;
2758 }
2759
2760 /* still inside #ifdef BSD4_1 */
2761 #ifdef subprocesses
2762
2763 int sigheld; /* Mask of held signals */
2764
2765 void
2766 sigholdx (signum)
2767 int signum;
2768 {
2769 sigheld |= sigbit (signum);
2770 sighold (signum);
2771 }
2772
2773 void
2774 sigisheld (signum)
2775 int signum;
2776 {
2777 sigheld |= sigbit (signum);
2778 }
2779
2780 void
2781 sigunhold (signum)
2782 int signum;
2783 {
2784 sigheld &= ~sigbit (signum);
2785 sigrelse (signum);
2786 }
2787
2788 void
2789 sigfree () /* Free all held signals */
2790 {
2791 int i;
2792 for (i = 0; i < NSIG; i++)
2793 if (sigheld & sigbit (i))
2794 sigrelse (i);
2795 sigheld = 0;
2796 }
2797
2798 int
2799 sigbit (i)
2800 {
2801 return 1 << (i - 1);
2802 }
2803 #endif /* subprocesses */
2804 #endif /* BSD4_1 */
2805 \f
2806 /* POSIX signals support - DJB */
2807 /* Anyone with POSIX signals should have ANSI C declarations */
2808
2809 #ifdef POSIX_SIGNALS
2810
2811 sigset_t empty_mask, full_mask;
2812
2813 signal_handler_t
2814 sys_signal (int signal_number, signal_handler_t action)
2815 {
2816 struct sigaction new_action, old_action;
2817 sigemptyset (&new_action.sa_mask);
2818 new_action.sa_handler = action;
2819 #ifdef SA_RESTART
2820 /* Emacs mostly works better with restartable system services. If this
2821 * flag exists, we probably want to turn it on here.
2822 */
2823 new_action.sa_flags = SA_RESTART;
2824 #else
2825 new_action.sa_flags = 0;
2826 #endif
2827 sigaction (signal_number, &new_action, &old_action);
2828 return (old_action.sa_handler);
2829 }
2830
2831 #ifndef __GNUC__
2832 /* If we're compiling with GCC, we don't need this function, since it
2833 can be written as a macro. */
2834 sigset_t
2835 sys_sigmask (int sig)
2836 {
2837 sigset_t mask;
2838 sigemptyset (&mask);
2839 sigaddset (&mask, sig);
2840 return mask;
2841 }
2842 #endif
2843
2844 /* I'd like to have these guys return pointers to the mask storage in here,
2845 but there'd be trouble if the code was saving multiple masks. I'll be
2846 safe and pass the structure. It normally won't be more than 2 bytes
2847 anyhow. - DJB */
2848
2849 sigset_t
2850 sys_sigblock (sigset_t new_mask)
2851 {
2852 sigset_t old_mask;
2853 sigprocmask (SIG_BLOCK, &new_mask, &old_mask);
2854 return (old_mask);
2855 }
2856
2857 sigset_t
2858 sys_sigunblock (sigset_t new_mask)
2859 {
2860 sigset_t old_mask;
2861 sigprocmask (SIG_UNBLOCK, &new_mask, &old_mask);
2862 return (old_mask);
2863 }
2864
2865 sigset_t
2866 sys_sigsetmask (sigset_t new_mask)
2867 {
2868 sigset_t old_mask;
2869 sigprocmask (SIG_SETMASK, &new_mask, &old_mask);
2870 return (old_mask);
2871 }
2872
2873 #endif /* POSIX_SIGNALS */
2874 \f
2875 #if !defined HAVE_STRSIGNAL && !defined SYS_SIGLIST_DECLARED
2876 static char *my_sys_siglist[NSIG];
2877 # ifdef sys_siglist
2878 # undef sys_siglist
2879 # endif
2880 # define sys_siglist my_sys_siglist
2881 #endif
2882
2883 void
2884 init_signals ()
2885 {
2886 #ifdef POSIX_SIGNALS
2887 sigemptyset (&empty_mask);
2888 sigfillset (&full_mask);
2889 #endif
2890
2891 #if !defined HAVE_STRSIGNAL && !defined SYS_SIGLIST_DECLARED
2892 if (! initialized)
2893 {
2894 # ifdef SIGABRT
2895 sys_siglist[SIGABRT] = "Aborted";
2896 # endif
2897 # ifdef SIGAIO
2898 sys_siglist[SIGAIO] = "LAN I/O interrupt";
2899 # endif
2900 # ifdef SIGALRM
2901 sys_siglist[SIGALRM] = "Alarm clock";
2902 # endif
2903 # ifdef SIGBUS
2904 sys_siglist[SIGBUS] = "Bus error";
2905 # endif
2906 # ifdef SIGCLD
2907 sys_siglist[SIGCLD] = "Child status changed";
2908 # endif
2909 # ifdef SIGCHLD
2910 sys_siglist[SIGCHLD] = "Child status changed";
2911 # endif
2912 # ifdef SIGCONT
2913 sys_siglist[SIGCONT] = "Continued";
2914 # endif
2915 # ifdef SIGDANGER
2916 sys_siglist[SIGDANGER] = "Swap space dangerously low";
2917 # endif
2918 # ifdef SIGDGNOTIFY
2919 sys_siglist[SIGDGNOTIFY] = "Notification message in queue";
2920 # endif
2921 # ifdef SIGEMT
2922 sys_siglist[SIGEMT] = "Emulation trap";
2923 # endif
2924 # ifdef SIGFPE
2925 sys_siglist[SIGFPE] = "Arithmetic exception";
2926 # endif
2927 # ifdef SIGFREEZE
2928 sys_siglist[SIGFREEZE] = "SIGFREEZE";
2929 # endif
2930 # ifdef SIGGRANT
2931 sys_siglist[SIGGRANT] = "Monitor mode granted";
2932 # endif
2933 # ifdef SIGHUP
2934 sys_siglist[SIGHUP] = "Hangup";
2935 # endif
2936 # ifdef SIGILL
2937 sys_siglist[SIGILL] = "Illegal instruction";
2938 # endif
2939 # ifdef SIGINT
2940 sys_siglist[SIGINT] = "Interrupt";
2941 # endif
2942 # ifdef SIGIO
2943 sys_siglist[SIGIO] = "I/O possible";
2944 # endif
2945 # ifdef SIGIOINT
2946 sys_siglist[SIGIOINT] = "I/O intervention required";
2947 # endif
2948 # ifdef SIGIOT
2949 sys_siglist[SIGIOT] = "IOT trap";
2950 # endif
2951 # ifdef SIGKILL
2952 sys_siglist[SIGKILL] = "Killed";
2953 # endif
2954 # ifdef SIGLOST
2955 sys_siglist[SIGLOST] = "Resource lost";
2956 # endif
2957 # ifdef SIGLWP
2958 sys_siglist[SIGLWP] = "SIGLWP";
2959 # endif
2960 # ifdef SIGMSG
2961 sys_siglist[SIGMSG] = "Monitor mode data available";
2962 # endif
2963 # ifdef SIGPHONE
2964 sys_siglist[SIGWIND] = "SIGPHONE";
2965 # endif
2966 # ifdef SIGPIPE
2967 sys_siglist[SIGPIPE] = "Broken pipe";
2968 # endif
2969 # ifdef SIGPOLL
2970 sys_siglist[SIGPOLL] = "Pollable event occurred";
2971 # endif
2972 # ifdef SIGPROF
2973 sys_siglist[SIGPROF] = "Profiling timer expired";
2974 # endif
2975 # ifdef SIGPTY
2976 sys_siglist[SIGPTY] = "PTY I/O interrupt";
2977 # endif
2978 # ifdef SIGPWR
2979 sys_siglist[SIGPWR] = "Power-fail restart";
2980 # endif
2981 # ifdef SIGQUIT
2982 sys_siglist[SIGQUIT] = "Quit";
2983 # endif
2984 # ifdef SIGRETRACT
2985 sys_siglist[SIGRETRACT] = "Need to relinguish monitor mode";
2986 # endif
2987 # ifdef SIGSAK
2988 sys_siglist[SIGSAK] = "Secure attention";
2989 # endif
2990 # ifdef SIGSEGV
2991 sys_siglist[SIGSEGV] = "Segmentation violation";
2992 # endif
2993 # ifdef SIGSOUND
2994 sys_siglist[SIGSOUND] = "Sound completed";
2995 # endif
2996 # ifdef SIGSTOP
2997 sys_siglist[SIGSTOP] = "Stopped (signal)";
2998 # endif
2999 # ifdef SIGSTP
3000 sys_siglist[SIGSTP] = "Stopped (user)";
3001 # endif
3002 # ifdef SIGSYS
3003 sys_siglist[SIGSYS] = "Bad argument to system call";
3004 # endif
3005 # ifdef SIGTERM
3006 sys_siglist[SIGTERM] = "Terminated";
3007 # endif
3008 # ifdef SIGTHAW
3009 sys_siglist[SIGTHAW] = "SIGTHAW";
3010 # endif
3011 # ifdef SIGTRAP
3012 sys_siglist[SIGTRAP] = "Trace/breakpoint trap";
3013 # endif
3014 # ifdef SIGTSTP
3015 sys_siglist[SIGTSTP] = "Stopped (user)";
3016 # endif
3017 # ifdef SIGTTIN
3018 sys_siglist[SIGTTIN] = "Stopped (tty input)";
3019 # endif
3020 # ifdef SIGTTOU
3021 sys_siglist[SIGTTOU] = "Stopped (tty output)";
3022 # endif
3023 # ifdef SIGURG
3024 sys_siglist[SIGURG] = "Urgent I/O condition";
3025 # endif
3026 # ifdef SIGUSR1
3027 sys_siglist[SIGUSR1] = "User defined signal 1";
3028 # endif
3029 # ifdef SIGUSR2
3030 sys_siglist[SIGUSR2] = "User defined signal 2";
3031 # endif
3032 # ifdef SIGVTALRM
3033 sys_siglist[SIGVTALRM] = "Virtual timer expired";
3034 # endif
3035 # ifdef SIGWAITING
3036 sys_siglist[SIGWAITING] = "Process's LWPs are blocked";
3037 # endif
3038 # ifdef SIGWINCH
3039 sys_siglist[SIGWINCH] = "Window size changed";
3040 # endif
3041 # ifdef SIGWIND
3042 sys_siglist[SIGWIND] = "SIGWIND";
3043 # endif
3044 # ifdef SIGXCPU
3045 sys_siglist[SIGXCPU] = "CPU time limit exceeded";
3046 # endif
3047 # ifdef SIGXFSZ
3048 sys_siglist[SIGXFSZ] = "File size limit exceeded";
3049 # endif
3050 }
3051 #endif /* !defined HAVE_STRSIGNAL && !defined SYS_SIGLIST_DECLARED */
3052 }
3053 \f
3054 #ifndef HAVE_RANDOM
3055 #ifdef random
3056 #define HAVE_RANDOM
3057 #endif
3058 #endif
3059
3060 /* Figure out how many bits the system's random number generator uses.
3061 `random' and `lrand48' are assumed to return 31 usable bits.
3062 BSD `rand' returns a 31 bit value but the low order bits are unusable;
3063 so we'll shift it and treat it like the 15-bit USG `rand'. */
3064
3065 #ifndef RAND_BITS
3066 # ifdef HAVE_RANDOM
3067 # define RAND_BITS 31
3068 # else /* !HAVE_RANDOM */
3069 # ifdef HAVE_LRAND48
3070 # define RAND_BITS 31
3071 # define random lrand48
3072 # else /* !HAVE_LRAND48 */
3073 # define RAND_BITS 15
3074 # if RAND_MAX == 32767
3075 # define random rand
3076 # else /* RAND_MAX != 32767 */
3077 # if RAND_MAX == 2147483647
3078 # define random() (rand () >> 16)
3079 # else /* RAND_MAX != 2147483647 */
3080 # ifdef USG
3081 # define random rand
3082 # else
3083 # define random() (rand () >> 16)
3084 # endif /* !USG */
3085 # endif /* RAND_MAX != 2147483647 */
3086 # endif /* RAND_MAX != 32767 */
3087 # endif /* !HAVE_LRAND48 */
3088 # endif /* !HAVE_RANDOM */
3089 #endif /* !RAND_BITS */
3090
3091 void
3092 seed_random (arg)
3093 long arg;
3094 {
3095 #ifdef HAVE_RANDOM
3096 srandom ((unsigned int)arg);
3097 #else
3098 # ifdef HAVE_LRAND48
3099 srand48 (arg);
3100 # else
3101 srand ((unsigned int)arg);
3102 # endif
3103 #endif
3104 }
3105
3106 /*
3107 * Build a full Emacs-sized word out of whatever we've got.
3108 * This suffices even for a 64-bit architecture with a 15-bit rand.
3109 */
3110 long
3111 get_random ()
3112 {
3113 long val = random ();
3114 #if VALBITS > RAND_BITS
3115 val = (val << RAND_BITS) ^ random ();
3116 #if VALBITS > 2*RAND_BITS
3117 val = (val << RAND_BITS) ^ random ();
3118 #if VALBITS > 3*RAND_BITS
3119 val = (val << RAND_BITS) ^ random ();
3120 #if VALBITS > 4*RAND_BITS
3121 val = (val << RAND_BITS) ^ random ();
3122 #endif /* need at least 5 */
3123 #endif /* need at least 4 */
3124 #endif /* need at least 3 */
3125 #endif /* need at least 2 */
3126 return val & ((1L << VALBITS) - 1);
3127 }
3128 \f
3129 #ifdef WRONG_NAME_INSQUE
3130
3131 insque (q,p)
3132 caddr_t q,p;
3133 {
3134 _insque (q,p);
3135 }
3136
3137 #endif
3138 \f
3139 #ifdef VMS
3140
3141 #ifdef getenv
3142 /* If any place else asks for the TERM variable,
3143 allow it to be overridden with the EMACS_TERM variable
3144 before attempting to translate the logical name TERM. As a last
3145 resort, ask for VAX C's special idea of the TERM variable. */
3146 #undef getenv
3147 char *
3148 sys_getenv (name)
3149 char *name;
3150 {
3151 register char *val;
3152 static char buf[256];
3153 static struct dsc$descriptor_s equiv
3154 = {sizeof (buf), DSC$K_DTYPE_T, DSC$K_CLASS_S, buf};
3155 static struct dsc$descriptor_s d_name
3156 = {0, DSC$K_DTYPE_T, DSC$K_CLASS_S, 0};
3157 short eqlen;
3158
3159 if (!strcmp (name, "TERM"))
3160 {
3161 val = (char *) getenv ("EMACS_TERM");
3162 if (val)
3163 return val;
3164 }
3165
3166 d_name.dsc$w_length = strlen (name);
3167 d_name.dsc$a_pointer = name;
3168 if (LIB$SYS_TRNLOG (&d_name, &eqlen, &equiv) == 1)
3169 {
3170 char *str = (char *) xmalloc (eqlen + 1);
3171 bcopy (buf, str, eqlen);
3172 str[eqlen] = '\0';
3173 /* This is a storage leak, but a pain to fix. With luck,
3174 no one will ever notice. */
3175 return str;
3176 }
3177 return (char *) getenv (name);
3178 }
3179 #endif /* getenv */
3180
3181 #ifdef abort
3182 /* Since VMS doesn't believe in core dumps, the only way to debug this beast is
3183 to force a call on the debugger from within the image. */
3184 #undef abort
3185 sys_abort ()
3186 {
3187 reset_sys_modes ();
3188 LIB$SIGNAL (SS$_DEBUG);
3189 }
3190 #endif /* abort */
3191 #endif /* VMS */
3192 \f
3193 #ifdef VMS
3194 #ifdef LINK_CRTL_SHARE
3195 #ifdef SHARABLE_LIB_BUG
3196 /* Variables declared noshare and initialized in sharable libraries
3197 cannot be shared. The VMS linker incorrectly forces you to use a private
3198 version which is uninitialized... If not for this "feature", we
3199 could use the C library definition of sys_nerr and sys_errlist. */
3200 int sys_nerr = 35;
3201 char *sys_errlist[] =
3202 {
3203 "error 0",
3204 "not owner",
3205 "no such file or directory",
3206 "no such process",
3207 "interrupted system call",
3208 "i/o error",
3209 "no such device or address",
3210 "argument list too long",
3211 "exec format error",
3212 "bad file number",
3213 "no child process",
3214 "no more processes",
3215 "not enough memory",
3216 "permission denied",
3217 "bad address",
3218 "block device required",
3219 "mount devices busy",
3220 "file exists",
3221 "cross-device link",
3222 "no such device",
3223 "not a directory",
3224 "is a directory",
3225 "invalid argument",
3226 "file table overflow",
3227 "too many open files",
3228 "not a typewriter",
3229 "text file busy",
3230 "file too big",
3231 "no space left on device",
3232 "illegal seek",
3233 "read-only file system",
3234 "too many links",
3235 "broken pipe",
3236 "math argument",
3237 "result too large",
3238 "I/O stream empty",
3239 "vax/vms specific error code nontranslatable error"
3240 };
3241 #endif /* SHARABLE_LIB_BUG */
3242 #endif /* LINK_CRTL_SHARE */
3243 #endif /* VMS */
3244
3245 #ifndef HAVE_STRERROR
3246 #ifndef WINDOWSNT
3247 char *
3248 strerror (errnum)
3249 int errnum;
3250 {
3251 extern char *sys_errlist[];
3252 extern int sys_nerr;
3253
3254 if (errnum >= 0 && errnum < sys_nerr)
3255 return sys_errlist[errnum];
3256 return (char *) "Unknown error";
3257 }
3258 #endif /* not WINDOWSNT */
3259 #endif /* ! HAVE_STRERROR */
3260 \f
3261 int
3262 emacs_open (path, oflag, mode)
3263 char *path;
3264 int oflag, mode;
3265 {
3266 register int rtnval;
3267
3268 #ifdef BSD4_1
3269 if (oflag & O_CREAT)
3270 return creat (path, mode);
3271 #endif
3272
3273 while ((rtnval = open (path, oflag, mode)) == -1
3274 && (errno == EINTR));
3275 return (rtnval);
3276 }
3277
3278 int
3279 emacs_close (fd)
3280 int fd;
3281 {
3282 int did_retry = 0;
3283 register int rtnval;
3284
3285 while ((rtnval = close (fd)) == -1
3286 && (errno == EINTR))
3287 did_retry = 1;
3288
3289 /* If close is interrupted SunOS 4.1 may or may not have closed the
3290 file descriptor. If it did the second close will fail with
3291 errno = EBADF. That means we have succeeded. */
3292 if (rtnval == -1 && did_retry && errno == EBADF)
3293 return 0;
3294
3295 return rtnval;
3296 }
3297
3298 int
3299 emacs_read (fildes, buf, nbyte)
3300 int fildes;
3301 char *buf;
3302 unsigned int nbyte;
3303 {
3304 register int rtnval;
3305
3306 while ((rtnval = read (fildes, buf, nbyte)) == -1
3307 && (errno == EINTR));
3308 return (rtnval);
3309 }
3310
3311 int
3312 emacs_write (fildes, buf, nbyte)
3313 int fildes;
3314 char *buf;
3315 unsigned int nbyte;
3316 {
3317 register int rtnval, bytes_written;
3318
3319 bytes_written = 0;
3320
3321 while (nbyte > 0)
3322 {
3323 rtnval = write (fildes, buf, nbyte);
3324
3325 if (rtnval == -1)
3326 {
3327 if (errno == EINTR)
3328 continue;
3329 else
3330 return (bytes_written ? bytes_written : -1);
3331 }
3332
3333 buf += rtnval;
3334 nbyte -= rtnval;
3335 bytes_written += rtnval;
3336 }
3337 return (bytes_written);
3338 }
3339 \f
3340 #ifdef USG
3341 /*
3342 * All of the following are for USG.
3343 *
3344 * On USG systems the system calls are INTERRUPTIBLE by signals
3345 * that the user program has elected to catch. Thus the system call
3346 * must be retried in these cases. To handle this without massive
3347 * changes in the source code, we remap the standard system call names
3348 * to names for our own functions in sysdep.c that do the system call
3349 * with retries. Actually, for portability reasons, it is good
3350 * programming practice, as this example shows, to limit all actual
3351 * system calls to a single occurrence in the source. Sure, this
3352 * adds an extra level of function call overhead but it is almost
3353 * always negligible. Fred Fish, Unisoft Systems Inc.
3354 */
3355
3356 /*
3357 * Warning, this function may not duplicate 4.2 action properly
3358 * under error conditions.
3359 */
3360
3361 #ifndef MAXPATHLEN
3362 /* In 4.1, param.h fails to define this. */
3363 #define MAXPATHLEN 1024
3364 #endif
3365
3366 #ifndef HAVE_GETWD
3367
3368 char *
3369 getwd (pathname)
3370 char *pathname;
3371 {
3372 char *npath, *spath;
3373 extern char *getcwd ();
3374
3375 BLOCK_INPUT; /* getcwd uses malloc */
3376 spath = npath = getcwd ((char *) 0, MAXPATHLEN);
3377 if (spath == 0)
3378 {
3379 UNBLOCK_INPUT;
3380 return spath;
3381 }
3382 /* On Altos 3068, getcwd can return @hostname/dir, so discard
3383 up to first slash. Should be harmless on other systems. */
3384 while (*npath && *npath != '/')
3385 npath++;
3386 strcpy (pathname, npath);
3387 free (spath); /* getcwd uses malloc */
3388 UNBLOCK_INPUT;
3389 return pathname;
3390 }
3391
3392 #endif /* HAVE_GETWD */
3393
3394 /*
3395 * Emulate rename using unlink/link. Note that this is
3396 * only partially correct. Also, doesn't enforce restriction
3397 * that files be of same type (regular->regular, dir->dir, etc).
3398 */
3399
3400 #ifndef HAVE_RENAME
3401
3402 rename (from, to)
3403 const char *from;
3404 const char *to;
3405 {
3406 if (access (from, 0) == 0)
3407 {
3408 unlink (to);
3409 if (link (from, to) == 0)
3410 if (unlink (from) == 0)
3411 return (0);
3412 }
3413 return (-1);
3414 }
3415
3416 #endif
3417
3418
3419 #ifdef HPUX
3420 #ifndef HAVE_PERROR
3421
3422 /* HPUX curses library references perror, but as far as we know
3423 it won't be called. Anyway this definition will do for now. */
3424
3425 perror ()
3426 {
3427 }
3428
3429 #endif /* not HAVE_PERROR */
3430 #endif /* HPUX */
3431
3432 #ifndef HAVE_DUP2
3433
3434 /*
3435 * Emulate BSD dup2. First close newd if it already exists.
3436 * Then, attempt to dup oldd. If not successful, call dup2 recursively
3437 * until we are, then close the unsuccessful ones.
3438 */
3439
3440 dup2 (oldd, newd)
3441 int oldd;
3442 int newd;
3443 {
3444 register int fd, ret;
3445
3446 emacs_close (newd);
3447
3448 #ifdef F_DUPFD
3449 return fcntl (oldd, F_DUPFD, newd);
3450 #else
3451 fd = dup (old);
3452 if (fd == -1)
3453 return -1;
3454 if (fd == new)
3455 return new;
3456 ret = dup2 (old,new);
3457 emacs_close (fd);
3458 return ret;
3459 #endif
3460 }
3461
3462 #endif /* not HAVE_DUP2 */
3463
3464 /*
3465 * Gettimeofday. Simulate as much as possible. Only accurate
3466 * to nearest second. Emacs doesn't use tzp so ignore it for now.
3467 * Only needed when subprocesses are defined.
3468 */
3469
3470 #ifdef subprocesses
3471 #ifndef VMS
3472 #ifndef HAVE_GETTIMEOFDAY
3473 #ifdef HAVE_TIMEVAL
3474
3475 /* ARGSUSED */
3476 int
3477 gettimeofday (tp, tzp)
3478 struct timeval *tp;
3479 struct timezone *tzp;
3480 {
3481 extern long time ();
3482
3483 tp->tv_sec = time ((long *)0);
3484 tp->tv_usec = 0;
3485 if (tzp != 0)
3486 tzp->tz_minuteswest = -1;
3487 return 0;
3488 }
3489
3490 #endif
3491 #endif
3492 #endif
3493 #endif /* subprocess && !HAVE_GETTIMEOFDAY && HAVE_TIMEVAL && !VMS */
3494
3495 /*
3496 * This function will go away as soon as all the stubs fixed. (fnf)
3497 */
3498
3499 void
3500 croak (badfunc)
3501 char *badfunc;
3502 {
3503 printf ("%s not yet implemented\r\n", badfunc);
3504 reset_sys_modes ();
3505 exit (1);
3506 }
3507
3508 #endif /* USG */
3509 \f
3510 /* Directory routines for systems that don't have them. */
3511
3512 #ifdef SYSV_SYSTEM_DIR
3513
3514 #include <dirent.h>
3515
3516 #if defined (BROKEN_CLOSEDIR) || !defined (HAVE_CLOSEDIR)
3517
3518 int
3519 closedir (dirp)
3520 register DIR *dirp; /* stream from opendir */
3521 {
3522 int rtnval;
3523
3524 rtnval = emacs_close (dirp->dd_fd);
3525
3526 /* Some systems (like Solaris) allocate the buffer and the DIR all
3527 in one block. Why in the world are we freeing this ourselves
3528 anyway? */
3529 #if ! (defined (sun) && defined (USG5_4))
3530 xfree ((char *) dirp->dd_buf); /* directory block defined in <dirent.h> */
3531 #endif
3532 xfree ((char *) dirp);
3533
3534 return rtnval;
3535 }
3536 #endif /* BROKEN_CLOSEDIR or not HAVE_CLOSEDIR */
3537 #endif /* SYSV_SYSTEM_DIR */
3538
3539 #ifdef NONSYSTEM_DIR_LIBRARY
3540
3541 DIR *
3542 opendir (filename)
3543 char *filename; /* name of directory */
3544 {
3545 register DIR *dirp; /* -> malloc'ed storage */
3546 register int fd; /* file descriptor for read */
3547 struct stat sbuf; /* result of fstat */
3548
3549 fd = emacs_open (filename, O_RDONLY, 0);
3550 if (fd < 0)
3551 return 0;
3552
3553 BLOCK_INPUT;
3554 if (fstat (fd, &sbuf) < 0
3555 || (sbuf.st_mode & S_IFMT) != S_IFDIR
3556 || (dirp = (DIR *) xmalloc (sizeof (DIR))) == 0)
3557 {
3558 emacs_close (fd);
3559 UNBLOCK_INPUT;
3560 return 0; /* bad luck today */
3561 }
3562 UNBLOCK_INPUT;
3563
3564 dirp->dd_fd = fd;
3565 dirp->dd_loc = dirp->dd_size = 0; /* refill needed */
3566
3567 return dirp;
3568 }
3569
3570 void
3571 closedir (dirp)
3572 register DIR *dirp; /* stream from opendir */
3573 {
3574 emacs_close (dirp->dd_fd);
3575 xfree ((char *) dirp);
3576 }
3577
3578
3579 #ifndef VMS
3580 #define DIRSIZ 14
3581 struct olddir
3582 {
3583 ino_t od_ino; /* inode */
3584 char od_name[DIRSIZ]; /* filename */
3585 };
3586 #endif /* not VMS */
3587
3588 struct direct dir_static; /* simulated directory contents */
3589
3590 /* ARGUSED */
3591 struct direct *
3592 readdir (dirp)
3593 register DIR *dirp; /* stream from opendir */
3594 {
3595 #ifndef VMS
3596 register struct olddir *dp; /* -> directory data */
3597 #else /* VMS */
3598 register struct dir$_name *dp; /* -> directory data */
3599 register struct dir$_version *dv; /* -> version data */
3600 #endif /* VMS */
3601
3602 for (; ;)
3603 {
3604 if (dirp->dd_loc >= dirp->dd_size)
3605 dirp->dd_loc = dirp->dd_size = 0;
3606
3607 if (dirp->dd_size == 0 /* refill buffer */
3608 && (dirp->dd_size = emacs_read (dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ)) <= 0)
3609 return 0;
3610
3611 #ifndef VMS
3612 dp = (struct olddir *) &dirp->dd_buf[dirp->dd_loc];
3613 dirp->dd_loc += sizeof (struct olddir);
3614
3615 if (dp->od_ino != 0) /* not deleted entry */
3616 {
3617 dir_static.d_ino = dp->od_ino;
3618 strncpy (dir_static.d_name, dp->od_name, DIRSIZ);
3619 dir_static.d_name[DIRSIZ] = '\0';
3620 dir_static.d_namlen = strlen (dir_static.d_name);
3621 dir_static.d_reclen = sizeof (struct direct)
3622 - MAXNAMLEN + 3
3623 + dir_static.d_namlen - dir_static.d_namlen % 4;
3624 return &dir_static; /* -> simulated structure */
3625 }
3626 #else /* VMS */
3627 dp = (struct dir$_name *) dirp->dd_buf;
3628 if (dirp->dd_loc == 0)
3629 dirp->dd_loc = (dp->dir$b_namecount&1) ? dp->dir$b_namecount + 1
3630 : dp->dir$b_namecount;
3631 dv = (struct dir$_version *)&dp->dir$t_name[dirp->dd_loc];
3632 dir_static.d_ino = dv->dir$w_fid_num;
3633 dir_static.d_namlen = dp->dir$b_namecount;
3634 dir_static.d_reclen = sizeof (struct direct)
3635 - MAXNAMLEN + 3
3636 + dir_static.d_namlen - dir_static.d_namlen % 4;
3637 strncpy (dir_static.d_name, dp->dir$t_name, dp->dir$b_namecount);
3638 dir_static.d_name[dir_static.d_namlen] = '\0';
3639 dirp->dd_loc = dirp->dd_size; /* only one record at a time */
3640 return &dir_static;
3641 #endif /* VMS */
3642 }
3643 }
3644
3645 #ifdef VMS
3646 /* readdirver is just like readdir except it returns all versions of a file
3647 as separate entries. */
3648
3649 /* ARGUSED */
3650 struct direct *
3651 readdirver (dirp)
3652 register DIR *dirp; /* stream from opendir */
3653 {
3654 register struct dir$_name *dp; /* -> directory data */
3655 register struct dir$_version *dv; /* -> version data */
3656
3657 if (dirp->dd_loc >= dirp->dd_size - sizeof (struct dir$_name))
3658 dirp->dd_loc = dirp->dd_size = 0;
3659
3660 if (dirp->dd_size == 0 /* refill buffer */
3661 && (dirp->dd_size = sys_read (dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ)) <= 0)
3662 return 0;
3663
3664 dp = (struct dir$_name *) dirp->dd_buf;
3665 if (dirp->dd_loc == 0)
3666 dirp->dd_loc = (dp->dir$b_namecount & 1) ? dp->dir$b_namecount + 1
3667 : dp->dir$b_namecount;
3668 dv = (struct dir$_version *) &dp->dir$t_name[dirp->dd_loc];
3669 strncpy (dir_static.d_name, dp->dir$t_name, dp->dir$b_namecount);
3670 sprintf (&dir_static.d_name[dp->dir$b_namecount], ";%d", dv->dir$w_version);
3671 dir_static.d_namlen = strlen (dir_static.d_name);
3672 dir_static.d_ino = dv->dir$w_fid_num;
3673 dir_static.d_reclen = sizeof (struct direct) - MAXNAMLEN + 3
3674 + dir_static.d_namlen - dir_static.d_namlen % 4;
3675 dirp->dd_loc = ((char *) (++dv) - dp->dir$t_name);
3676 return &dir_static;
3677 }
3678
3679 #endif /* VMS */
3680
3681 #endif /* NONSYSTEM_DIR_LIBRARY */
3682
3683 \f
3684 int
3685 set_file_times (filename, atime, mtime)
3686 char *filename;
3687 EMACS_TIME atime, mtime;
3688 {
3689 #ifdef HAVE_UTIMES
3690 struct timeval tv[2];
3691 tv[0] = atime;
3692 tv[1] = mtime;
3693 return utimes (filename, tv);
3694 #else /* not HAVE_UTIMES */
3695 struct utimbuf utb;
3696 utb.actime = EMACS_SECS (atime);
3697 utb.modtime = EMACS_SECS (mtime);
3698 return utime (filename, &utb);
3699 #endif /* not HAVE_UTIMES */
3700 }
3701 \f
3702 /* mkdir and rmdir functions, for systems which don't have them. */
3703
3704 #ifndef HAVE_MKDIR
3705 /*
3706 * Written by Robert Rother, Mariah Corporation, August 1985.
3707 *
3708 * If you want it, it's yours. All I ask in return is that if you
3709 * figure out how to do this in a Bourne Shell script you send me
3710 * a copy.
3711 * sdcsvax!rmr or rmr@uscd
3712 *
3713 * Severely hacked over by John Gilmore to make a 4.2BSD compatible
3714 * subroutine. 11Mar86; hoptoad!gnu
3715 *
3716 * Modified by rmtodd@uokmax 6-28-87 -- when making an already existing dir,
3717 * subroutine didn't return EEXIST. It does now.
3718 */
3719
3720 /*
3721 * Make a directory.
3722 */
3723 #ifdef MKDIR_PROTOTYPE
3724 MKDIR_PROTOTYPE
3725 #else
3726 int
3727 mkdir (dpath, dmode)
3728 char *dpath;
3729 int dmode;
3730 #endif
3731 {
3732 int cpid, status, fd;
3733 struct stat statbuf;
3734
3735 if (stat (dpath, &statbuf) == 0)
3736 {
3737 errno = EEXIST; /* Stat worked, so it already exists */
3738 return -1;
3739 }
3740
3741 /* If stat fails for a reason other than non-existence, return error */
3742 if (errno != ENOENT)
3743 return -1;
3744
3745 synch_process_alive = 1;
3746 switch (cpid = fork ())
3747 {
3748
3749 case -1: /* Error in fork */
3750 return (-1); /* Errno is set already */
3751
3752 case 0: /* Child process */
3753 /*
3754 * Cheap hack to set mode of new directory. Since this
3755 * child process is going away anyway, we zap its umask.
3756 * FIXME, this won't suffice to set SUID, SGID, etc. on this
3757 * directory. Does anybody care?
3758 */
3759 status = umask (0); /* Get current umask */
3760 status = umask (status | (0777 & ~dmode)); /* Set for mkdir */
3761 fd = emacs_open ("/dev/null", O_RDWR, 0);
3762 if (fd >= 0)
3763 {
3764 dup2 (fd, 0);
3765 dup2 (fd, 1);
3766 dup2 (fd, 2);
3767 }
3768 execl ("/bin/mkdir", "mkdir", dpath, (char *) 0);
3769 _exit (-1); /* Can't exec /bin/mkdir */
3770
3771 default: /* Parent process */
3772 wait_for_termination (cpid);
3773 }
3774
3775 if (synch_process_death != 0 || synch_process_retcode != 0)
3776 {
3777 errno = EIO; /* We don't know why, but */
3778 return -1; /* /bin/mkdir failed */
3779 }
3780
3781 return 0;
3782 }
3783 #endif /* not HAVE_MKDIR */
3784
3785 #ifndef HAVE_RMDIR
3786 int
3787 rmdir (dpath)
3788 char *dpath;
3789 {
3790 int cpid, status, fd;
3791 struct stat statbuf;
3792
3793 if (stat (dpath, &statbuf) != 0)
3794 {
3795 /* Stat just set errno. We don't have to */
3796 return -1;
3797 }
3798
3799 synch_process_alive = 1;
3800 switch (cpid = fork ())
3801 {
3802
3803 case -1: /* Error in fork */
3804 return (-1); /* Errno is set already */
3805
3806 case 0: /* Child process */
3807 fd = emacs_open ("/dev/null", O_RDWR, 0);
3808 if (fd >= 0)
3809 {
3810 dup2 (fd, 0);
3811 dup2 (fd, 1);
3812 dup2 (fd, 2);
3813 }
3814 execl ("/bin/rmdir", "rmdir", dpath, (char *) 0);
3815 _exit (-1); /* Can't exec /bin/rmdir */
3816
3817 default: /* Parent process */
3818 wait_for_termination (cpid);
3819 }
3820
3821 if (synch_process_death != 0 || synch_process_retcode != 0)
3822 {
3823 errno = EIO; /* We don't know why, but */
3824 return -1; /* /bin/rmdir failed */
3825 }
3826
3827 return 0;
3828 }
3829 #endif /* !HAVE_RMDIR */
3830
3831
3832 \f
3833 /* Functions for VMS */
3834 #ifdef VMS
3835 #include "vms-pwd.h"
3836 #include <acldef.h>
3837 #include <chpdef.h>
3838 #include <jpidef.h>
3839
3840 /* Return as a string the VMS error string pertaining to STATUS.
3841 Reuses the same static buffer each time it is called. */
3842
3843 char *
3844 vmserrstr (status)
3845 int status; /* VMS status code */
3846 {
3847 int bufadr[2];
3848 short len;
3849 static char buf[257];
3850
3851 bufadr[0] = sizeof buf - 1;
3852 bufadr[1] = (int) buf;
3853 if (! (SYS$GETMSG (status, &len, bufadr, 0x1, 0) & 1))
3854 return "untranslatable VMS error status";
3855 buf[len] = '\0';
3856 return buf;
3857 }
3858
3859 #ifdef access
3860 #undef access
3861
3862 /* The following is necessary because 'access' emulation by VMS C (2.0) does
3863 * not work correctly. (It also doesn't work well in version 2.3.)
3864 */
3865
3866 #ifdef VMS4_4
3867
3868 #define DESCRIPTOR(name,string) struct dsc$descriptor_s name = \
3869 { strlen (string), DSC$K_DTYPE_T, DSC$K_CLASS_S, string }
3870
3871 typedef union {
3872 struct {
3873 unsigned short s_buflen;
3874 unsigned short s_code;
3875 char *s_bufadr;
3876 unsigned short *s_retlenadr;
3877 } s;
3878 int end;
3879 } item;
3880 #define buflen s.s_buflen
3881 #define code s.s_code
3882 #define bufadr s.s_bufadr
3883 #define retlenadr s.s_retlenadr
3884
3885 #define R_OK 4 /* test for read permission */
3886 #define W_OK 2 /* test for write permission */
3887 #define X_OK 1 /* test for execute (search) permission */
3888 #define F_OK 0 /* test for presence of file */
3889
3890 int
3891 sys_access (path, mode)
3892 char *path;
3893 int mode;
3894 {
3895 static char *user = NULL;
3896 char dir_fn[512];
3897
3898 /* translate possible directory spec into .DIR file name, so brain-dead
3899 * access can treat the directory like a file. */
3900 if (directory_file_name (path, dir_fn))
3901 path = dir_fn;
3902
3903 if (mode == F_OK)
3904 return access (path, mode);
3905 if (user == NULL && (user = (char *) getenv ("USER")) == NULL)
3906 return -1;
3907 {
3908 int stat;
3909 int flags;
3910 int acces;
3911 unsigned short int dummy;
3912 item itemlst[3];
3913 static int constant = ACL$C_FILE;
3914 DESCRIPTOR (path_desc, path);
3915 DESCRIPTOR (user_desc, user);
3916
3917 flags = 0;
3918 acces = 0;
3919 if ((mode & X_OK) && ((stat = access (path, mode)) < 0 || mode == X_OK))
3920 return stat;
3921 if (mode & R_OK)
3922 acces |= CHP$M_READ;
3923 if (mode & W_OK)
3924 acces |= CHP$M_WRITE;
3925 itemlst[0].buflen = sizeof (int);
3926 itemlst[0].code = CHP$_FLAGS;
3927 itemlst[0].bufadr = (char *) &flags;
3928 itemlst[0].retlenadr = &dummy;
3929 itemlst[1].buflen = sizeof (int);
3930 itemlst[1].code = CHP$_ACCESS;
3931 itemlst[1].bufadr = (char *) &acces;
3932 itemlst[1].retlenadr = &dummy;
3933 itemlst[2].end = CHP$_END;
3934 stat = SYS$CHECK_ACCESS (&constant, &path_desc, &user_desc, itemlst);
3935 return stat == SS$_NORMAL ? 0 : -1;
3936 }
3937 }
3938
3939 #else /* not VMS4_4 */
3940
3941 #include <prvdef.h>
3942 #define ACE$M_WRITE 2
3943 #define ACE$C_KEYID 1
3944
3945 static unsigned short memid, grpid;
3946 static unsigned int uic;
3947
3948 /* Called from init_sys_modes, so it happens not very often
3949 but at least each time Emacs is loaded. */
3950 void
3951 sys_access_reinit ()
3952 {
3953 uic = 0;
3954 }
3955
3956 int
3957 sys_access (filename, type)
3958 char * filename;
3959 int type;
3960 {
3961 struct FAB fab;
3962 struct XABPRO xab;
3963 int status, size, i, typecode, acl_controlled;
3964 unsigned int *aclptr, *aclend, aclbuf[60];
3965 union prvdef prvmask;
3966
3967 /* Get UIC and GRP values for protection checking. */
3968 if (uic == 0)
3969 {
3970 status = LIB$GETJPI (&JPI$_UIC, 0, 0, &uic, 0, 0);
3971 if (! (status & 1))
3972 return -1;
3973 memid = uic & 0xFFFF;
3974 grpid = uic >> 16;
3975 }
3976
3977 if (type != 2) /* not checking write access */
3978 return access (filename, type);
3979
3980 /* Check write protection. */
3981
3982 #define CHECKPRIV(bit) (prvmask.bit)
3983 #define WRITABLE(field) (! ((xab.xab$w_pro >> field) & XAB$M_NOWRITE))
3984
3985 /* Find privilege bits */
3986 status = SYS$SETPRV (0, 0, 0, prvmask);
3987 if (! (status & 1))
3988 error ("Unable to find privileges: %s", vmserrstr (status));
3989 if (CHECKPRIV (PRV$V_BYPASS))
3990 return 0; /* BYPASS enabled */
3991 fab = cc$rms_fab;
3992 fab.fab$b_fac = FAB$M_GET;
3993 fab.fab$l_fna = filename;
3994 fab.fab$b_fns = strlen (filename);
3995 fab.fab$l_xab = &xab;
3996 xab = cc$rms_xabpro;
3997 xab.xab$l_aclbuf = aclbuf;
3998 xab.xab$w_aclsiz = sizeof (aclbuf);
3999 status = SYS$OPEN (&fab, 0, 0);
4000 if (! (status & 1))
4001 return -1;
4002 SYS$CLOSE (&fab, 0, 0);
4003 /* Check system access */
4004 if (CHECKPRIV (PRV$V_SYSPRV) && WRITABLE (XAB$V_SYS))
4005 return 0;
4006 /* Check ACL entries, if any */
4007 acl_controlled = 0;
4008 if (xab.xab$w_acllen > 0)
4009 {
4010 aclptr = aclbuf;
4011 aclend = &aclbuf[xab.xab$w_acllen / 4];
4012 while (*aclptr && aclptr < aclend)
4013 {
4014 size = (*aclptr & 0xff) / 4;
4015 typecode = (*aclptr >> 8) & 0xff;
4016 if (typecode == ACE$C_KEYID)
4017 for (i = size - 1; i > 1; i--)
4018 if (aclptr[i] == uic)
4019 {
4020 acl_controlled = 1;
4021 if (aclptr[1] & ACE$M_WRITE)
4022 return 0; /* Write access through ACL */
4023 }
4024 aclptr = &aclptr[size];
4025 }
4026 if (acl_controlled) /* ACL specified, prohibits write access */
4027 return -1;
4028 }
4029 /* No ACL entries specified, check normal protection */
4030 if (WRITABLE (XAB$V_WLD)) /* World writable */
4031 return 0;
4032 if (WRITABLE (XAB$V_GRP) &&
4033 (unsigned short) (xab.xab$l_uic >> 16) == grpid)
4034 return 0; /* Group writable */
4035 if (WRITABLE (XAB$V_OWN) &&
4036 (xab.xab$l_uic & 0xFFFF) == memid)
4037 return 0; /* Owner writable */
4038
4039 return -1; /* Not writable */
4040 }
4041 #endif /* not VMS4_4 */
4042 #endif /* access */
4043
4044 static char vtbuf[NAM$C_MAXRSS+1];
4045
4046 /* translate a vms file spec to a unix path */
4047 char *
4048 sys_translate_vms (vfile)
4049 char * vfile;
4050 {
4051 char * p;
4052 char * targ;
4053
4054 if (!vfile)
4055 return 0;
4056
4057 targ = vtbuf;
4058
4059 /* leading device or logical name is a root directory */
4060 if (p = strchr (vfile, ':'))
4061 {
4062 *targ++ = '/';
4063 while (vfile < p)
4064 *targ++ = *vfile++;
4065 vfile++;
4066 *targ++ = '/';
4067 }
4068 p = vfile;
4069 if (*p == '[' || *p == '<')
4070 {
4071 while (*++vfile != *p + 2)
4072 switch (*vfile)
4073 {
4074 case '.':
4075 if (vfile[-1] == *p)
4076 *targ++ = '.';
4077 *targ++ = '/';
4078 break;
4079
4080 case '-':
4081 *targ++ = '.';
4082 *targ++ = '.';
4083 break;
4084
4085 default:
4086 *targ++ = *vfile;
4087 break;
4088 }
4089 vfile++;
4090 *targ++ = '/';
4091 }
4092 while (*vfile)
4093 *targ++ = *vfile++;
4094
4095 return vtbuf;
4096 }
4097
4098 static char utbuf[NAM$C_MAXRSS+1];
4099
4100 /* translate a unix path to a VMS file spec */
4101 char *
4102 sys_translate_unix (ufile)
4103 char * ufile;
4104 {
4105 int slash_seen = 0;
4106 char *p;
4107 char * targ;
4108
4109 if (!ufile)
4110 return 0;
4111
4112 targ = utbuf;
4113
4114 if (*ufile == '/')
4115 {
4116 ufile++;
4117 }
4118
4119 while (*ufile)
4120 {
4121 switch (*ufile)
4122 {
4123 case '/':
4124 if (slash_seen)
4125 if (index (&ufile[1], '/'))
4126 *targ++ = '.';
4127 else
4128 *targ++ = ']';
4129 else
4130 {
4131 *targ++ = ':';
4132 if (index (&ufile[1], '/'))
4133 *targ++ = '[';
4134 slash_seen = 1;
4135 }
4136 break;
4137
4138 case '.':
4139 if (strncmp (ufile, "./", 2) == 0)
4140 {
4141 if (!slash_seen)
4142 {
4143 *targ++ = '[';
4144 slash_seen = 1;
4145 }
4146 ufile++; /* skip the dot */
4147 if (index (&ufile[1], '/'))
4148 *targ++ = '.';
4149 else
4150 *targ++ = ']';
4151 }
4152 else if (strncmp (ufile, "../", 3) == 0)
4153 {
4154 if (!slash_seen)
4155 {
4156 *targ++ = '[';
4157 slash_seen = 1;
4158 }
4159 *targ++ = '-';
4160 ufile += 2; /* skip the dots */
4161 if (index (&ufile[1], '/'))
4162 *targ++ = '.';
4163 else
4164 *targ++ = ']';
4165 }
4166 else
4167 *targ++ = *ufile;
4168 break;
4169
4170 default:
4171 *targ++ = *ufile;
4172 break;
4173 }
4174 ufile++;
4175 }
4176 *targ = '\0';
4177
4178 return utbuf;
4179 }
4180
4181 char *
4182 getwd (pathname)
4183 char *pathname;
4184 {
4185 char *ptr, *val;
4186 extern char *getcwd ();
4187
4188 #define MAXPATHLEN 1024
4189
4190 ptr = xmalloc (MAXPATHLEN);
4191 val = getcwd (ptr, MAXPATHLEN);
4192 if (val == 0)
4193 {
4194 xfree (ptr);
4195 return val;
4196 }
4197 strcpy (pathname, ptr);
4198 xfree (ptr);
4199
4200 return pathname;
4201 }
4202
4203 int
4204 getppid ()
4205 {
4206 long item_code = JPI$_OWNER;
4207 unsigned long parent_id;
4208 int status;
4209
4210 if (((status = LIB$GETJPI (&item_code, 0, 0, &parent_id)) & 1) == 0)
4211 {
4212 errno = EVMSERR;
4213 vaxc$errno = status;
4214 return -1;
4215 }
4216 return parent_id;
4217 }
4218
4219 #undef getuid
4220 unsigned
4221 sys_getuid ()
4222 {
4223 return (getgid () << 16) | getuid ();
4224 }
4225
4226 #undef read
4227 int
4228 sys_read (fildes, buf, nbyte)
4229 int fildes;
4230 char *buf;
4231 unsigned int nbyte;
4232 {
4233 return read (fildes, buf, (nbyte < MAXIOSIZE ? nbyte : MAXIOSIZE));
4234 }
4235
4236 #if 0
4237 int
4238 sys_write (fildes, buf, nbyte)
4239 int fildes;
4240 char *buf;
4241 unsigned int nbyte;
4242 {
4243 register int nwrote, rtnval = 0;
4244
4245 while (nbyte > MAXIOSIZE && (nwrote = write (fildes, buf, MAXIOSIZE)) > 0) {
4246 nbyte -= nwrote;
4247 buf += nwrote;
4248 rtnval += nwrote;
4249 }
4250 if (nwrote < 0)
4251 return rtnval ? rtnval : -1;
4252 if ((nwrote = write (fildes, buf, nbyte)) < 0)
4253 return rtnval ? rtnval : -1;
4254 return (rtnval + nwrote);
4255 }
4256 #endif /* 0 */
4257
4258 /*
4259 * VAX/VMS VAX C RTL really loses. It insists that records
4260 * end with a newline (carriage return) character, and if they
4261 * don't it adds one (nice of it isn't it!)
4262 *
4263 * Thus we do this stupidity below.
4264 */
4265
4266 #undef write
4267 int
4268 sys_write (fildes, buf, nbytes)
4269 int fildes;
4270 char *buf;
4271 unsigned int nbytes;
4272 {
4273 register char *p;
4274 register char *e;
4275 int sum = 0;
4276 struct stat st;
4277
4278 fstat (fildes, &st);
4279 p = buf;
4280 while (nbytes > 0)
4281 {
4282 int len, retval;
4283
4284 /* Handle fixed-length files with carriage control. */
4285 if (st.st_fab_rfm == FAB$C_FIX
4286 && ((st.st_fab_rat & (FAB$M_FTN | FAB$M_CR)) != 0))
4287 {
4288 len = st.st_fab_mrs;
4289 retval = write (fildes, p, min (len, nbytes));
4290 if (retval != len)
4291 return -1;
4292 retval++; /* This skips the implied carriage control */
4293 }
4294 else
4295 {
4296 e = p + min (MAXIOSIZE, nbytes) - 1;
4297 while (*e != '\n' && e > p) e--;
4298 if (p == e) /* Ok.. so here we add a newline... sigh. */
4299 e = p + min (MAXIOSIZE, nbytes) - 1;
4300 len = e + 1 - p;
4301 retval = write (fildes, p, len);
4302 if (retval != len)
4303 return -1;
4304 }
4305 p += retval;
4306 sum += retval;
4307 nbytes -= retval;
4308 }
4309 return sum;
4310 }
4311
4312 /* Create file NEW copying its attributes from file OLD. If
4313 OLD is 0 or does not exist, create based on the value of
4314 vms_stmlf_recfm. */
4315
4316 /* Protection value the file should ultimately have.
4317 Set by create_copy_attrs, and use by rename_sansversions. */
4318 static unsigned short int fab_final_pro;
4319
4320 int
4321 creat_copy_attrs (old, new)
4322 char *old, *new;
4323 {
4324 struct FAB fab = cc$rms_fab;
4325 struct XABPRO xabpro;
4326 char aclbuf[256]; /* Choice of size is arbitrary. See below. */
4327 extern int vms_stmlf_recfm;
4328
4329 if (old)
4330 {
4331 fab.fab$b_fac = FAB$M_GET;
4332 fab.fab$l_fna = old;
4333 fab.fab$b_fns = strlen (old);
4334 fab.fab$l_xab = (char *) &xabpro;
4335 xabpro = cc$rms_xabpro;
4336 xabpro.xab$l_aclbuf = aclbuf;
4337 xabpro.xab$w_aclsiz = sizeof aclbuf;
4338 /* Call $OPEN to fill in the fab & xabpro fields. */
4339 if (SYS$OPEN (&fab, 0, 0) & 1)
4340 {
4341 SYS$CLOSE (&fab, 0, 0);
4342 fab.fab$l_alq = 0; /* zero the allocation quantity */
4343 if (xabpro.xab$w_acllen > 0)
4344 {
4345 if (xabpro.xab$w_acllen > sizeof aclbuf)
4346 /* If the acl buffer was too short, redo open with longer one.
4347 Wouldn't need to do this if there were some system imposed
4348 limit on the size of an ACL, but I can't find any such. */
4349 {
4350 xabpro.xab$l_aclbuf = (char *) alloca (xabpro.xab$w_acllen);
4351 xabpro.xab$w_aclsiz = xabpro.xab$w_acllen;
4352 if (SYS$OPEN (&fab, 0, 0) & 1)
4353 SYS$CLOSE (&fab, 0, 0);
4354 else
4355 old = 0;
4356 }
4357 }
4358 else
4359 xabpro.xab$l_aclbuf = 0;
4360 }
4361 else
4362 old = 0;
4363 }
4364 fab.fab$l_fna = new;
4365 fab.fab$b_fns = strlen (new);
4366 if (!old)
4367 {
4368 fab.fab$l_xab = 0;
4369 fab.fab$b_rfm = vms_stmlf_recfm ? FAB$C_STMLF : FAB$C_VAR;
4370 fab.fab$b_rat = FAB$M_CR;
4371 }
4372
4373 /* Set the file protections such that we will be able to manipulate
4374 this file. Once we are done writing and renaming it, we will set
4375 the protections back. */
4376 if (old)
4377 fab_final_pro = xabpro.xab$w_pro;
4378 else
4379 SYS$SETDFPROT (0, &fab_final_pro);
4380 xabpro.xab$w_pro &= 0xff0f; /* set O:rewd for now. This is set back later. */
4381
4382 /* Create the new file with either default attrs or attrs copied
4383 from old file. */
4384 if (!(SYS$CREATE (&fab, 0, 0) & 1))
4385 return -1;
4386 SYS$CLOSE (&fab, 0, 0);
4387 /* As this is a "replacement" for creat, return a file descriptor
4388 opened for writing. */
4389 return open (new, O_WRONLY);
4390 }
4391
4392 #ifdef creat
4393 #undef creat
4394 #include <varargs.h>
4395 #ifdef __GNUC__
4396 #ifndef va_count
4397 #define va_count(X) ((X) = *(((int *) &(va_alist)) - 1))
4398 #endif
4399 #endif
4400
4401 int
4402 sys_creat (va_alist)
4403 va_dcl
4404 {
4405 va_list list_incrementer;
4406 char *name;
4407 int mode;
4408 int rfd; /* related file descriptor */
4409 int fd; /* Our new file descriptor */
4410 int count;
4411 struct stat st_buf;
4412 char rfm[12];
4413 char rat[15];
4414 char mrs[13];
4415 char fsz[13];
4416 extern int vms_stmlf_recfm;
4417
4418 va_count (count);
4419 va_start (list_incrementer);
4420 name = va_arg (list_incrementer, char *);
4421 mode = va_arg (list_incrementer, int);
4422 if (count > 2)
4423 rfd = va_arg (list_incrementer, int);
4424 va_end (list_incrementer);
4425 if (count > 2)
4426 {
4427 /* Use information from the related file descriptor to set record
4428 format of the newly created file. */
4429 fstat (rfd, &st_buf);
4430 switch (st_buf.st_fab_rfm)
4431 {
4432 case FAB$C_FIX:
4433 strcpy (rfm, "rfm = fix");
4434 sprintf (mrs, "mrs = %d", st_buf.st_fab_mrs);
4435 strcpy (rat, "rat = ");
4436 if (st_buf.st_fab_rat & FAB$M_CR)
4437 strcat (rat, "cr");
4438 else if (st_buf.st_fab_rat & FAB$M_FTN)
4439 strcat (rat, "ftn");
4440 else if (st_buf.st_fab_rat & FAB$M_PRN)
4441 strcat (rat, "prn");
4442 if (st_buf.st_fab_rat & FAB$M_BLK)
4443 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4444 strcat (rat, ", blk");
4445 else
4446 strcat (rat, "blk");
4447 return creat (name, 0, rfm, rat, mrs);
4448
4449 case FAB$C_VFC:
4450 strcpy (rfm, "rfm = vfc");
4451 sprintf (fsz, "fsz = %d", st_buf.st_fab_fsz);
4452 strcpy (rat, "rat = ");
4453 if (st_buf.st_fab_rat & FAB$M_CR)
4454 strcat (rat, "cr");
4455 else if (st_buf.st_fab_rat & FAB$M_FTN)
4456 strcat (rat, "ftn");
4457 else if (st_buf.st_fab_rat & FAB$M_PRN)
4458 strcat (rat, "prn");
4459 if (st_buf.st_fab_rat & FAB$M_BLK)
4460 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4461 strcat (rat, ", blk");
4462 else
4463 strcat (rat, "blk");
4464 return creat (name, 0, rfm, rat, fsz);
4465
4466 case FAB$C_STM:
4467 strcpy (rfm, "rfm = stm");
4468 break;
4469
4470 case FAB$C_STMCR:
4471 strcpy (rfm, "rfm = stmcr");
4472 break;
4473
4474 case FAB$C_STMLF:
4475 strcpy (rfm, "rfm = stmlf");
4476 break;
4477
4478 case FAB$C_UDF:
4479 strcpy (rfm, "rfm = udf");
4480 break;
4481
4482 case FAB$C_VAR:
4483 strcpy (rfm, "rfm = var");
4484 break;
4485 }
4486 strcpy (rat, "rat = ");
4487 if (st_buf.st_fab_rat & FAB$M_CR)
4488 strcat (rat, "cr");
4489 else if (st_buf.st_fab_rat & FAB$M_FTN)
4490 strcat (rat, "ftn");
4491 else if (st_buf.st_fab_rat & FAB$M_PRN)
4492 strcat (rat, "prn");
4493 if (st_buf.st_fab_rat & FAB$M_BLK)
4494 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4495 strcat (rat, ", blk");
4496 else
4497 strcat (rat, "blk");
4498 }
4499 else
4500 {
4501 strcpy (rfm, vms_stmlf_recfm ? "rfm = stmlf" : "rfm=var");
4502 strcpy (rat, "rat=cr");
4503 }
4504 /* Until the VAX C RTL fixes the many bugs with modes, always use
4505 mode 0 to get the user's default protection. */
4506 fd = creat (name, 0, rfm, rat);
4507 if (fd < 0 && errno == EEXIST)
4508 {
4509 if (unlink (name) < 0)
4510 report_file_error ("delete", build_string (name));
4511 fd = creat (name, 0, rfm, rat);
4512 }
4513 return fd;
4514 }
4515 #endif /* creat */
4516
4517 /* fwrite to stdout is S L O W. Speed it up by using fputc...*/
4518 int
4519 sys_fwrite (ptr, size, num, fp)
4520 register char * ptr;
4521 FILE * fp;
4522 {
4523 register int tot = num * size;
4524
4525 while (tot--)
4526 fputc (*ptr++, fp);
4527 return num;
4528 }
4529
4530 /*
4531 * The VMS C library routine creat actually creates a new version of an
4532 * existing file rather than truncating the old version. There are times
4533 * when this is not the desired behavior, for instance, when writing an
4534 * auto save file (you only want one version), or when you don't have
4535 * write permission in the directory containing the file (but the file
4536 * itself is writable). Hence this routine, which is equivalent to
4537 * "close (creat (fn, 0));" on Unix if fn already exists.
4538 */
4539 int
4540 vms_truncate (fn)
4541 char *fn;
4542 {
4543 struct FAB xfab = cc$rms_fab;
4544 struct RAB xrab = cc$rms_rab;
4545 int status;
4546
4547 xfab.fab$l_fop = FAB$M_TEF; /* free allocated but unused blocks on close */
4548 xfab.fab$b_fac = FAB$M_TRN | FAB$M_GET; /* allow truncate and get access */
4549 xfab.fab$b_shr = FAB$M_NIL; /* allow no sharing - file must be locked */
4550 xfab.fab$l_fna = fn;
4551 xfab.fab$b_fns = strlen (fn);
4552 xfab.fab$l_dna = ";0"; /* default to latest version of the file */
4553 xfab.fab$b_dns = 2;
4554 xrab.rab$l_fab = &xfab;
4555
4556 /* This gibberish opens the file, positions to the first record, and
4557 deletes all records from there until the end of file. */
4558 if ((SYS$OPEN (&xfab) & 01) == 01)
4559 {
4560 if ((SYS$CONNECT (&xrab) & 01) == 01 &&
4561 (SYS$FIND (&xrab) & 01) == 01 &&
4562 (SYS$TRUNCATE (&xrab) & 01) == 01)
4563 status = 0;
4564 else
4565 status = -1;
4566 }
4567 else
4568 status = -1;
4569 SYS$CLOSE (&xfab);
4570 return status;
4571 }
4572
4573 /* Define this symbol to actually read SYSUAF.DAT. This requires either
4574 SYSPRV or a readable SYSUAF.DAT. */
4575
4576 #ifdef READ_SYSUAF
4577 /*
4578 * getuaf.c
4579 *
4580 * Routine to read the VMS User Authorization File and return
4581 * a specific user's record.
4582 */
4583
4584 static struct UAF retuaf;
4585
4586 struct UAF *
4587 get_uaf_name (uname)
4588 char * uname;
4589 {
4590 register status;
4591 struct FAB uaf_fab;
4592 struct RAB uaf_rab;
4593
4594 uaf_fab = cc$rms_fab;
4595 uaf_rab = cc$rms_rab;
4596 /* initialize fab fields */
4597 uaf_fab.fab$l_fna = "SYS$SYSTEM:SYSUAF.DAT";
4598 uaf_fab.fab$b_fns = 21;
4599 uaf_fab.fab$b_fac = FAB$M_GET;
4600 uaf_fab.fab$b_org = FAB$C_IDX;
4601 uaf_fab.fab$b_shr = FAB$M_GET|FAB$M_PUT|FAB$M_UPD|FAB$M_DEL;
4602 /* initialize rab fields */
4603 uaf_rab.rab$l_fab = &uaf_fab;
4604 /* open the User Authorization File */
4605 status = SYS$OPEN (&uaf_fab);
4606 if (!(status&1))
4607 {
4608 errno = EVMSERR;
4609 vaxc$errno = status;
4610 return 0;
4611 }
4612 status = SYS$CONNECT (&uaf_rab);
4613 if (!(status&1))
4614 {
4615 errno = EVMSERR;
4616 vaxc$errno = status;
4617 return 0;
4618 }
4619 /* read the requested record - index is in uname */
4620 uaf_rab.rab$l_kbf = uname;
4621 uaf_rab.rab$b_ksz = strlen (uname);
4622 uaf_rab.rab$b_rac = RAB$C_KEY;
4623 uaf_rab.rab$l_ubf = (char *)&retuaf;
4624 uaf_rab.rab$w_usz = sizeof retuaf;
4625 status = SYS$GET (&uaf_rab);
4626 if (!(status&1))
4627 {
4628 errno = EVMSERR;
4629 vaxc$errno = status;
4630 return 0;
4631 }
4632 /* close the User Authorization File */
4633 status = SYS$DISCONNECT (&uaf_rab);
4634 if (!(status&1))
4635 {
4636 errno = EVMSERR;
4637 vaxc$errno = status;
4638 return 0;
4639 }
4640 status = SYS$CLOSE (&uaf_fab);
4641 if (!(status&1))
4642 {
4643 errno = EVMSERR;
4644 vaxc$errno = status;
4645 return 0;
4646 }
4647 return &retuaf;
4648 }
4649
4650 struct UAF *
4651 get_uaf_uic (uic)
4652 unsigned long uic;
4653 {
4654 register status;
4655 struct FAB uaf_fab;
4656 struct RAB uaf_rab;
4657
4658 uaf_fab = cc$rms_fab;
4659 uaf_rab = cc$rms_rab;
4660 /* initialize fab fields */
4661 uaf_fab.fab$l_fna = "SYS$SYSTEM:SYSUAF.DAT";
4662 uaf_fab.fab$b_fns = 21;
4663 uaf_fab.fab$b_fac = FAB$M_GET;
4664 uaf_fab.fab$b_org = FAB$C_IDX;
4665 uaf_fab.fab$b_shr = FAB$M_GET|FAB$M_PUT|FAB$M_UPD|FAB$M_DEL;
4666 /* initialize rab fields */
4667 uaf_rab.rab$l_fab = &uaf_fab;
4668 /* open the User Authorization File */
4669 status = SYS$OPEN (&uaf_fab);
4670 if (!(status&1))
4671 {
4672 errno = EVMSERR;
4673 vaxc$errno = status;
4674 return 0;
4675 }
4676 status = SYS$CONNECT (&uaf_rab);
4677 if (!(status&1))
4678 {
4679 errno = EVMSERR;
4680 vaxc$errno = status;
4681 return 0;
4682 }
4683 /* read the requested record - index is in uic */
4684 uaf_rab.rab$b_krf = 1; /* 1st alternate key */
4685 uaf_rab.rab$l_kbf = (char *) &uic;
4686 uaf_rab.rab$b_ksz = sizeof uic;
4687 uaf_rab.rab$b_rac = RAB$C_KEY;
4688 uaf_rab.rab$l_ubf = (char *)&retuaf;
4689 uaf_rab.rab$w_usz = sizeof retuaf;
4690 status = SYS$GET (&uaf_rab);
4691 if (!(status&1))
4692 {
4693 errno = EVMSERR;
4694 vaxc$errno = status;
4695 return 0;
4696 }
4697 /* close the User Authorization File */
4698 status = SYS$DISCONNECT (&uaf_rab);
4699 if (!(status&1))
4700 {
4701 errno = EVMSERR;
4702 vaxc$errno = status;
4703 return 0;
4704 }
4705 status = SYS$CLOSE (&uaf_fab);
4706 if (!(status&1))
4707 {
4708 errno = EVMSERR;
4709 vaxc$errno = status;
4710 return 0;
4711 }
4712 return &retuaf;
4713 }
4714
4715 static struct passwd retpw;
4716
4717 struct passwd *
4718 cnv_uaf_pw (up)
4719 struct UAF * up;
4720 {
4721 char * ptr;
4722
4723 /* copy these out first because if the username is 32 chars, the next
4724 section will overwrite the first byte of the UIC */
4725 retpw.pw_uid = up->uaf$w_mem;
4726 retpw.pw_gid = up->uaf$w_grp;
4727
4728 /* I suppose this is not the best style, to possibly overwrite one
4729 byte beyond the end of the field, but what the heck... */
4730 ptr = &up->uaf$t_username[UAF$S_USERNAME];
4731 while (ptr[-1] == ' ')
4732 ptr--;
4733 *ptr = '\0';
4734 strcpy (retpw.pw_name, up->uaf$t_username);
4735
4736 /* the rest of these are counted ascii strings */
4737 strncpy (retpw.pw_gecos, &up->uaf$t_owner[1], up->uaf$t_owner[0]);
4738 retpw.pw_gecos[up->uaf$t_owner[0]] = '\0';
4739 strncpy (retpw.pw_dir, &up->uaf$t_defdev[1], up->uaf$t_defdev[0]);
4740 retpw.pw_dir[up->uaf$t_defdev[0]] = '\0';
4741 strncat (retpw.pw_dir, &up->uaf$t_defdir[1], up->uaf$t_defdir[0]);
4742 retpw.pw_dir[up->uaf$t_defdev[0] + up->uaf$t_defdir[0]] = '\0';
4743 strncpy (retpw.pw_shell, &up->uaf$t_defcli[1], up->uaf$t_defcli[0]);
4744 retpw.pw_shell[up->uaf$t_defcli[0]] = '\0';
4745
4746 return &retpw;
4747 }
4748 #else /* not READ_SYSUAF */
4749 static struct passwd retpw;
4750 #endif /* not READ_SYSUAF */
4751
4752 struct passwd *
4753 getpwnam (name)
4754 char * name;
4755 {
4756 #ifdef READ_SYSUAF
4757 struct UAF *up;
4758 #else
4759 char * user;
4760 char * dir;
4761 unsigned char * full;
4762 #endif /* READ_SYSUAF */
4763 char *ptr = name;
4764
4765 while (*ptr)
4766 {
4767 if ('a' <= *ptr && *ptr <= 'z')
4768 *ptr -= 040;
4769 ptr++;
4770 }
4771 #ifdef READ_SYSUAF
4772 if (!(up = get_uaf_name (name)))
4773 return 0;
4774 return cnv_uaf_pw (up);
4775 #else
4776 if (strcmp (name, getenv ("USER")) == 0)
4777 {
4778 retpw.pw_uid = getuid ();
4779 retpw.pw_gid = getgid ();
4780 strcpy (retpw.pw_name, name);
4781 if (full = egetenv ("FULLNAME"))
4782 strcpy (retpw.pw_gecos, full);
4783 else
4784 *retpw.pw_gecos = '\0';
4785 strcpy (retpw.pw_dir, egetenv ("HOME"));
4786 *retpw.pw_shell = '\0';
4787 return &retpw;
4788 }
4789 else
4790 return 0;
4791 #endif /* not READ_SYSUAF */
4792 }
4793
4794 struct passwd *
4795 getpwuid (uid)
4796 unsigned long uid;
4797 {
4798 #ifdef READ_SYSUAF
4799 struct UAF * up;
4800
4801 if (!(up = get_uaf_uic (uid)))
4802 return 0;
4803 return cnv_uaf_pw (up);
4804 #else
4805 if (uid == sys_getuid ())
4806 return getpwnam (egetenv ("USER"));
4807 else
4808 return 0;
4809 #endif /* not READ_SYSUAF */
4810 }
4811
4812 /* return total address space available to the current process. This is
4813 the sum of the current p0 size, p1 size and free page table entries
4814 available. */
4815 int
4816 vlimit ()
4817 {
4818 int item_code;
4819 unsigned long free_pages;
4820 unsigned long frep0va;
4821 unsigned long frep1va;
4822 register status;
4823
4824 item_code = JPI$_FREPTECNT;
4825 if (((status = LIB$GETJPI (&item_code, 0, 0, &free_pages)) & 1) == 0)
4826 {
4827 errno = EVMSERR;
4828 vaxc$errno = status;
4829 return -1;
4830 }
4831 free_pages *= 512;
4832
4833 item_code = JPI$_FREP0VA;
4834 if (((status = LIB$GETJPI (&item_code, 0, 0, &frep0va)) & 1) == 0)
4835 {
4836 errno = EVMSERR;
4837 vaxc$errno = status;
4838 return -1;
4839 }
4840 item_code = JPI$_FREP1VA;
4841 if (((status = LIB$GETJPI (&item_code, 0, 0, &frep1va)) & 1) == 0)
4842 {
4843 errno = EVMSERR;
4844 vaxc$errno = status;
4845 return -1;
4846 }
4847
4848 return free_pages + frep0va + (0x7fffffff - frep1va);
4849 }
4850
4851 int
4852 define_logical_name (varname, string)
4853 char *varname;
4854 char *string;
4855 {
4856 struct dsc$descriptor_s strdsc =
4857 {strlen (string), DSC$K_DTYPE_T, DSC$K_CLASS_S, string};
4858 struct dsc$descriptor_s envdsc =
4859 {strlen (varname), DSC$K_DTYPE_T, DSC$K_CLASS_S, varname};
4860 struct dsc$descriptor_s lnmdsc =
4861 {7, DSC$K_DTYPE_T, DSC$K_CLASS_S, "LNM$JOB"};
4862
4863 return LIB$SET_LOGICAL (&envdsc, &strdsc, &lnmdsc, 0, 0);
4864 }
4865
4866 int
4867 delete_logical_name (varname)
4868 char *varname;
4869 {
4870 struct dsc$descriptor_s envdsc =
4871 {strlen (varname), DSC$K_DTYPE_T, DSC$K_CLASS_S, varname};
4872 struct dsc$descriptor_s lnmdsc =
4873 {7, DSC$K_DTYPE_T, DSC$K_CLASS_S, "LNM$JOB"};
4874
4875 return LIB$DELETE_LOGICAL (&envdsc, &lnmdsc);
4876 }
4877
4878 int
4879 ulimit ()
4880 {
4881 return 0;
4882 }
4883
4884 int
4885 setpgrp ()
4886 {
4887 return 0;
4888 }
4889
4890 int
4891 execvp ()
4892 {
4893 error ("execvp system call not implemented");
4894 return -1;
4895 }
4896
4897 int
4898 rename (from, to)
4899 char *from, *to;
4900 {
4901 int status;
4902 struct FAB from_fab = cc$rms_fab, to_fab = cc$rms_fab;
4903 struct NAM from_nam = cc$rms_nam, to_nam = cc$rms_nam;
4904 char from_esn[NAM$C_MAXRSS];
4905 char to_esn[NAM$C_MAXRSS];
4906
4907 from_fab.fab$l_fna = from;
4908 from_fab.fab$b_fns = strlen (from);
4909 from_fab.fab$l_nam = &from_nam;
4910 from_fab.fab$l_fop = FAB$M_NAM;
4911
4912 from_nam.nam$l_esa = from_esn;
4913 from_nam.nam$b_ess = sizeof from_esn;
4914
4915 to_fab.fab$l_fna = to;
4916 to_fab.fab$b_fns = strlen (to);
4917 to_fab.fab$l_nam = &to_nam;
4918 to_fab.fab$l_fop = FAB$M_NAM;
4919
4920 to_nam.nam$l_esa = to_esn;
4921 to_nam.nam$b_ess = sizeof to_esn;
4922
4923 status = SYS$RENAME (&from_fab, 0, 0, &to_fab);
4924
4925 if (status & 1)
4926 return 0;
4927 else
4928 {
4929 if (status == RMS$_DEV)
4930 errno = EXDEV;
4931 else
4932 errno = EVMSERR;
4933 vaxc$errno = status;
4934 return -1;
4935 }
4936 }
4937
4938 /* This function renames a file like `rename', but it strips
4939 the version number from the "to" filename, such that the "to" file is
4940 will always be a new version. It also sets the file protection once it is
4941 finished. The protection that we will use is stored in fab_final_pro,
4942 and was set when we did a creat_copy_attrs to create the file that we
4943 are renaming.
4944
4945 We could use the chmod function, but Eunichs uses 3 bits per user category
4946 to describe the protection, and VMS uses 4 (write and delete are separate
4947 bits). To maintain portability, the VMS implementation of `chmod' wires
4948 the W and D bits together. */
4949
4950
4951 static struct fibdef fib; /* We need this initialized to zero */
4952 char vms_file_written[NAM$C_MAXRSS];
4953
4954 int
4955 rename_sans_version (from,to)
4956 char *from, *to;
4957 {
4958 short int chan;
4959 int stat;
4960 short int iosb[4];
4961 int status;
4962 struct FAB to_fab = cc$rms_fab;
4963 struct NAM to_nam = cc$rms_nam;
4964 struct dsc$descriptor fib_d ={sizeof (fib),0,0,(char*) &fib};
4965 struct dsc$descriptor fib_attr[2]
4966 = {{sizeof (fab_final_pro),ATR$C_FPRO,0,(char*) &fab_final_pro},{0,0,0,0}};
4967 char to_esn[NAM$C_MAXRSS];
4968
4969 $DESCRIPTOR (disk,to_esn);
4970
4971 to_fab.fab$l_fna = to;
4972 to_fab.fab$b_fns = strlen (to);
4973 to_fab.fab$l_nam = &to_nam;
4974 to_fab.fab$l_fop = FAB$M_NAM;
4975
4976 to_nam.nam$l_esa = to_esn;
4977 to_nam.nam$b_ess = sizeof to_esn;
4978
4979 status = SYS$PARSE (&to_fab, 0, 0); /* figure out the full file name */
4980
4981 if (to_nam.nam$l_fnb && NAM$M_EXP_VER)
4982 *(to_nam.nam$l_ver) = '\0';
4983
4984 stat = rename (from, to_esn);
4985 if (stat < 0)
4986 return stat;
4987
4988 strcpy (vms_file_written, to_esn);
4989
4990 to_fab.fab$l_fna = vms_file_written; /* this points to the versionless name */
4991 to_fab.fab$b_fns = strlen (vms_file_written);
4992
4993 /* Now set the file protection to the correct value */
4994 SYS$OPEN (&to_fab, 0, 0); /* This fills in the nam$w_fid fields */
4995
4996 /* Copy these fields into the fib */
4997 fib.fib$r_fid_overlay.fib$w_fid[0] = to_nam.nam$w_fid[0];
4998 fib.fib$r_fid_overlay.fib$w_fid[1] = to_nam.nam$w_fid[1];
4999 fib.fib$r_fid_overlay.fib$w_fid[2] = to_nam.nam$w_fid[2];
5000
5001 SYS$CLOSE (&to_fab, 0, 0);
5002
5003 stat = SYS$ASSIGN (&disk, &chan, 0, 0); /* open a channel to the disk */
5004 if (!stat)
5005 LIB$SIGNAL (stat);
5006 stat = SYS$QIOW (0, chan, IO$_MODIFY, iosb, 0, 0, &fib_d,
5007 0, 0, 0, &fib_attr, 0);
5008 if (!stat)
5009 LIB$SIGNAL (stat);
5010 stat = SYS$DASSGN (chan);
5011 if (!stat)
5012 LIB$SIGNAL (stat);
5013 strcpy (vms_file_written, to_esn); /* We will write this to the terminal*/
5014 return 0;
5015 }
5016
5017 int
5018 link (file, new)
5019 char * file, * new;
5020 {
5021 register status;
5022 struct FAB fab;
5023 struct NAM nam;
5024 unsigned short fid[3];
5025 char esa[NAM$C_MAXRSS];
5026
5027 fab = cc$rms_fab;
5028 fab.fab$l_fop = FAB$M_OFP;
5029 fab.fab$l_fna = file;
5030 fab.fab$b_fns = strlen (file);
5031 fab.fab$l_nam = &nam;
5032
5033 nam = cc$rms_nam;
5034 nam.nam$l_esa = esa;
5035 nam.nam$b_ess = NAM$C_MAXRSS;
5036
5037 status = SYS$PARSE (&fab);
5038 if ((status & 1) == 0)
5039 {
5040 errno = EVMSERR;
5041 vaxc$errno = status;
5042 return -1;
5043 }
5044 status = SYS$SEARCH (&fab);
5045 if ((status & 1) == 0)
5046 {
5047 errno = EVMSERR;
5048 vaxc$errno = status;
5049 return -1;
5050 }
5051
5052 fid[0] = nam.nam$w_fid[0];
5053 fid[1] = nam.nam$w_fid[1];
5054 fid[2] = nam.nam$w_fid[2];
5055
5056 fab.fab$l_fna = new;
5057 fab.fab$b_fns = strlen (new);
5058
5059 status = SYS$PARSE (&fab);
5060 if ((status & 1) == 0)
5061 {
5062 errno = EVMSERR;
5063 vaxc$errno = status;
5064 return -1;
5065 }
5066
5067 nam.nam$w_fid[0] = fid[0];
5068 nam.nam$w_fid[1] = fid[1];
5069 nam.nam$w_fid[2] = fid[2];
5070
5071 nam.nam$l_esa = nam.nam$l_name;
5072 nam.nam$b_esl = nam.nam$b_name + nam.nam$b_type + nam.nam$b_ver;
5073
5074 status = SYS$ENTER (&fab);
5075 if ((status & 1) == 0)
5076 {
5077 errno = EVMSERR;
5078 vaxc$errno = status;
5079 return -1;
5080 }
5081
5082 return 0;
5083 }
5084
5085 void
5086 croak (badfunc)
5087 char *badfunc;
5088 {
5089 printf ("%s not yet implemented\r\n", badfunc);
5090 reset_sys_modes ();
5091 exit (1);
5092 }
5093
5094 long
5095 random ()
5096 {
5097 /* Arrange to return a range centered on zero. */
5098 return rand () - (1 << 30);
5099 }
5100
5101 void
5102 srandom (seed)
5103 {
5104 srand (seed);
5105 }
5106 #endif /* VMS */
5107 \f
5108 #ifdef AIXHFT
5109
5110 /* Called from init_sys_modes. */
5111 void
5112 hft_init ()
5113 {
5114 int junk;
5115
5116 /* If we're not on an HFT we shouldn't do any of this. We determine
5117 if we are on an HFT by trying to get an HFT error code. If this
5118 call fails, we're not on an HFT. */
5119 #ifdef IBMR2AIX
5120 if (ioctl (0, HFQERROR, &junk) < 0)
5121 return;
5122 #else /* not IBMR2AIX */
5123 if (ioctl (0, HFQEIO, 0) < 0)
5124 return;
5125 #endif /* not IBMR2AIX */
5126
5127 /* On AIX the default hft keyboard mapping uses backspace rather than delete
5128 as the rubout key's ASCII code. Here this is changed. The bug is that
5129 there's no way to determine the old mapping, so in reset_sys_modes
5130 we need to assume that the normal map had been present. Of course, this
5131 code also doesn't help if on a terminal emulator which doesn't understand
5132 HFT VTD's. */
5133 {
5134 struct hfbuf buf;
5135 struct hfkeymap keymap;
5136
5137 buf.hf_bufp = (char *)&keymap;
5138 buf.hf_buflen = sizeof (keymap);
5139 keymap.hf_nkeys = 2;
5140 keymap.hfkey[0].hf_kpos = 15;
5141 keymap.hfkey[0].hf_kstate = HFMAPCHAR | HFSHFNONE;
5142 #ifdef IBMR2AIX
5143 keymap.hfkey[0].hf_keyidh = '<';
5144 #else /* not IBMR2AIX */
5145 keymap.hfkey[0].hf_page = '<';
5146 #endif /* not IBMR2AIX */
5147 keymap.hfkey[0].hf_char = 127;
5148 keymap.hfkey[1].hf_kpos = 15;
5149 keymap.hfkey[1].hf_kstate = HFMAPCHAR | HFSHFSHFT;
5150 #ifdef IBMR2AIX
5151 keymap.hfkey[1].hf_keyidh = '<';
5152 #else /* not IBMR2AIX */
5153 keymap.hfkey[1].hf_page = '<';
5154 #endif /* not IBMR2AIX */
5155 keymap.hfkey[1].hf_char = 127;
5156 hftctl (0, HFSKBD, &buf);
5157 }
5158 /* The HFT system on AIX doesn't optimize for scrolling, so it's really ugly
5159 at times. */
5160 line_ins_del_ok = char_ins_del_ok = 0;
5161 }
5162
5163 /* Reset the rubout key to backspace. */
5164
5165 void
5166 hft_reset ()
5167 {
5168 struct hfbuf buf;
5169 struct hfkeymap keymap;
5170 int junk;
5171
5172 #ifdef IBMR2AIX
5173 if (ioctl (0, HFQERROR, &junk) < 0)
5174 return;
5175 #else /* not IBMR2AIX */
5176 if (ioctl (0, HFQEIO, 0) < 0)
5177 return;
5178 #endif /* not IBMR2AIX */
5179
5180 buf.hf_bufp = (char *)&keymap;
5181 buf.hf_buflen = sizeof (keymap);
5182 keymap.hf_nkeys = 2;
5183 keymap.hfkey[0].hf_kpos = 15;
5184 keymap.hfkey[0].hf_kstate = HFMAPCHAR | HFSHFNONE;
5185 #ifdef IBMR2AIX
5186 keymap.hfkey[0].hf_keyidh = '<';
5187 #else /* not IBMR2AIX */
5188 keymap.hfkey[0].hf_page = '<';
5189 #endif /* not IBMR2AIX */
5190 keymap.hfkey[0].hf_char = 8;
5191 keymap.hfkey[1].hf_kpos = 15;
5192 keymap.hfkey[1].hf_kstate = HFMAPCHAR | HFSHFSHFT;
5193 #ifdef IBMR2AIX
5194 keymap.hfkey[1].hf_keyidh = '<';
5195 #else /* not IBMR2AIX */
5196 keymap.hfkey[1].hf_page = '<';
5197 #endif /* not IBMR2AIX */
5198 keymap.hfkey[1].hf_char = 8;
5199 hftctl (0, HFSKBD, &buf);
5200 }
5201
5202 #endif /* AIXHFT */
5203
5204 #ifdef USE_DL_STUBS
5205
5206 /* These are included on Sunos 4.1 when we do not use shared libraries.
5207 X11 libraries may refer to these functions but (we hope) do not
5208 actually call them. */
5209
5210 void *
5211 dlopen ()
5212 {
5213 return 0;
5214 }
5215
5216 void *
5217 dlsym ()
5218 {
5219 return 0;
5220 }
5221
5222 int
5223 dlclose ()
5224 {
5225 return -1;
5226 }
5227
5228 #endif /* USE_DL_STUBS */
5229 \f
5230 #ifndef BSTRING
5231
5232 #ifndef bzero
5233
5234 void
5235 bzero (b, length)
5236 register char *b;
5237 register int length;
5238 {
5239 #ifdef VMS
5240 short zero = 0;
5241 long max_str = 65535;
5242
5243 while (length > max_str) {
5244 (void) LIB$MOVC5 (&zero, &zero, &zero, &max_str, b);
5245 length -= max_str;
5246 b += max_str;
5247 }
5248 max_str = length;
5249 (void) LIB$MOVC5 (&zero, &zero, &zero, &max_str, b);
5250 #else
5251 while (length-- > 0)
5252 *b++ = 0;
5253 #endif /* not VMS */
5254 }
5255
5256 #endif /* no bzero */
5257 #endif /* BSTRING */
5258
5259 #if (!defined (BSTRING) && !defined (bcopy)) || defined (NEED_BCOPY)
5260 #undef bcopy
5261
5262 /* Saying `void' requires a declaration, above, where bcopy is used
5263 and that declaration causes pain for systems where bcopy is a macro. */
5264 bcopy (b1, b2, length)
5265 register char *b1;
5266 register char *b2;
5267 register int length;
5268 {
5269 #ifdef VMS
5270 long max_str = 65535;
5271
5272 while (length > max_str) {
5273 (void) LIB$MOVC3 (&max_str, b1, b2);
5274 length -= max_str;
5275 b1 += max_str;
5276 b2 += max_str;
5277 }
5278 max_str = length;
5279 (void) LIB$MOVC3 (&length, b1, b2);
5280 #else
5281 while (length-- > 0)
5282 *b2++ = *b1++;
5283 #endif /* not VMS */
5284 }
5285 #endif /* (!defined (BSTRING) && !defined (bcopy)) || defined (NEED_BCOPY) */
5286
5287 #ifndef BSTRING
5288 #ifndef bcmp
5289 int
5290 bcmp (b1, b2, length) /* This could be a macro! */
5291 register char *b1;
5292 register char *b2;
5293 register int length;
5294 {
5295 #ifdef VMS
5296 struct dsc$descriptor_s src1 = {length, DSC$K_DTYPE_T, DSC$K_CLASS_S, b1};
5297 struct dsc$descriptor_s src2 = {length, DSC$K_DTYPE_T, DSC$K_CLASS_S, b2};
5298
5299 return STR$COMPARE (&src1, &src2);
5300 #else
5301 while (length-- > 0)
5302 if (*b1++ != *b2++)
5303 return 1;
5304
5305 return 0;
5306 #endif /* not VMS */
5307 }
5308 #endif /* no bcmp */
5309 #endif /* not BSTRING */
5310 \f
5311 #ifndef HAVE_STRSIGNAL
5312 char *
5313 strsignal (code)
5314 int code;
5315 {
5316 char *signame = 0;
5317
5318 if (0 <= code && code < NSIG)
5319 {
5320 #ifdef VMS
5321 signame = sys_errlist[code];
5322 #else
5323 /* Cast to suppress warning if the table has const char *. */
5324 signame = (char *) sys_siglist[code];
5325 #endif
5326 }
5327
5328 return signame;
5329 }
5330 #endif /* HAVE_STRSIGNAL */
5331
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