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