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[gnu-emacs] / src / sysdep.c
1 /* Interfaces to system-dependent kernel and library entries.
2 Copyright (C) 1985, 86,87,88,93,94,95, 1999, 2000, 2001
3 Free Software Foundation, Inc.
4
5 This file is part of GNU Emacs.
6
7 GNU Emacs is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
10 any later version.
11
12 GNU Emacs is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs; see the file COPYING. If not, write to
19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
21
22 #ifdef HAVE_CONFIG_H
23 #include <config.h>
24 #endif
25
26 #include <signal.h>
27 #include <setjmp.h>
28 #ifdef HAVE_UNISTD_H
29 #include <unistd.h>
30 #endif
31 #include "lisp.h"
32 /* Including stdlib.h isn't necessarily enough to get srandom
33 declared, e.g. without __USE_XOPEN_EXTENDED with glibc 2. */
34 #ifdef HAVE_RANDOM
35 #if 0 /* It turns out that defining _OSF_SOURCE in osf5-0.h gets
36 random prototyped as returning `int'. It looks to me as
37 though the best way to DTRT is to prefer the rand48 functions
38 (per libc.info). -- fx */
39 extern long int random P_ ((void));
40 #endif
41 #if 0 /* Don't prototype srandom; it takes an unsigned argument on
42 some systems, and an unsigned long on others, like FreeBSD
43 4.1. */
44 extern void srandom P_ ((unsigned int));
45 #endif
46 #endif
47
48 #include "blockinput.h"
49 #undef NULL
50
51 #ifdef MAC_OS8
52 /* It is essential to include stdlib.h so that this file picks up
53 the correct definitions of rand, srand, and RAND_MAX.
54 Otherwise random numbers will not work correctly. */
55 #include <stdlib.h>
56
57 #ifndef subprocesses
58 /* Nonzero means delete a process right away if it exits (process.c). */
59 static int delete_exited_processes;
60 #endif
61 #endif /* MAC_OS8 */
62
63 #ifdef WINDOWSNT
64 #define read sys_read
65 #define write sys_write
66 #include <windows.h>
67 #ifndef NULL
68 #define NULL 0
69 #endif
70 #endif /* not WINDOWSNT */
71
72 /* Does anyone other than VMS need this? */
73 #ifndef fwrite
74 #define sys_fwrite fwrite
75 #else
76 #undef fwrite
77 #endif
78
79 #include <stdio.h>
80 #include <sys/types.h>
81 #include <sys/stat.h>
82 #include <errno.h>
83
84 /* Get _POSIX_VDISABLE, if it is available. */
85 #ifdef HAVE_UNISTD_H
86 #include <unistd.h>
87 #endif
88
89 #ifdef HAVE_STDLIB_H
90 #include <stdlib.h>
91 #endif
92
93 #ifdef HAVE_SETPGID
94 #if !defined (USG) || defined (BSD_PGRPS)
95 #undef setpgrp
96 #define setpgrp setpgid
97 #endif
98 #endif
99
100 /* Get SI_SRPC_DOMAIN, if it is available. */
101 #ifdef HAVE_SYS_SYSTEMINFO_H
102 #include <sys/systeminfo.h>
103 #endif
104
105 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida, MW Aug 1993 */
106 #include <dos.h>
107 #include "dosfns.h"
108 #include "msdos.h"
109 #include <sys/param.h>
110
111 #if __DJGPP__ > 1
112 extern int etext;
113 extern unsigned start __asm__ ("start");
114 #endif
115 #endif
116
117 #ifndef USE_CRT_DLL
118 #ifndef errno
119 extern int errno;
120 #endif
121 #endif
122
123 #ifdef VMS
124 #include <rms.h>
125 #include <ttdef.h>
126 #include <tt2def.h>
127 #include <iodef.h>
128 #include <ssdef.h>
129 #include <descrip.h>
130 #include <fibdef.h>
131 #include <atrdef.h>
132 #include <ctype.h>
133 #include <string.h>
134 #ifdef __GNUC__
135 #include <sys/file.h>
136 #else
137 #include <file.h>
138 #endif
139 #undef F_SETFL
140 #ifndef RAB$C_BID
141 #include <rab.h>
142 #endif
143 #define MAXIOSIZE (32 * PAGESIZE) /* Don't I/O more than 32 blocks at a time */
144 #endif /* VMS */
145
146 #ifndef BSD4_1
147 #ifdef BSD_SYSTEM /* avoid writing defined (BSD_SYSTEM) || defined (USG)
148 because the vms compiler doesn't grok `defined' */
149 #include <fcntl.h>
150 #endif
151 #ifdef USG
152 #ifndef USG5
153 #include <fcntl.h>
154 #endif
155 #endif
156 #endif /* not 4.1 bsd */
157
158 #ifndef MSDOS
159 #include <sys/ioctl.h>
160 #endif
161
162 #include "systty.h"
163 #include "syswait.h"
164
165 #ifdef BROKEN_TIOCGWINSZ
166 #undef TIOCGWINSZ
167 #undef TIOCSWINSZ
168 #endif
169
170 #if defined (USG) || defined (DGUX)
171 #include <sys/utsname.h>
172 #ifndef MEMORY_IN_STRING_H
173 #include <memory.h>
174 #endif
175 #if defined (TIOCGWINSZ) || defined (ISC4_0)
176 #ifdef NEED_SIOCTL
177 #include <sys/sioctl.h>
178 #endif
179 #ifdef NEED_PTEM_H
180 #include <sys/stream.h>
181 #include <sys/ptem.h>
182 #endif
183 #endif /* TIOCGWINSZ or ISC4_0 */
184 #endif /* USG or DGUX */
185
186 extern int quit_char;
187
188 #include "keyboard.h"
189 #include "frame.h"
190 #include "window.h"
191 #include "termhooks.h"
192 #include "termchar.h"
193 #include "termopts.h"
194 #include "dispextern.h"
195 #include "process.h"
196
197 #ifdef WINDOWSNT
198 #include <direct.h>
199 /* In process.h which conflicts with the local copy. */
200 #define _P_WAIT 0
201 int _CRTAPI1 _spawnlp (int, const char *, const char *, ...);
202 int _CRTAPI1 _getpid (void);
203 #endif
204
205 #ifdef NONSYSTEM_DIR_LIBRARY
206 #include "ndir.h"
207 #endif /* NONSYSTEM_DIR_LIBRARY */
208
209 #include "syssignal.h"
210 #include "systime.h"
211 #ifdef HAVE_UTIME_H
212 #include <utime.h>
213 #endif
214
215 #ifndef HAVE_UTIMES
216 #ifndef HAVE_STRUCT_UTIMBUF
217 /* We want to use utime rather than utimes, but we couldn't find the
218 structure declaration. We'll use the traditional one. */
219 struct utimbuf {
220 long actime;
221 long modtime;
222 };
223 #endif
224 #endif
225
226 /* LPASS8 is new in 4.3, and makes cbreak mode provide all 8 bits. */
227 #ifndef LPASS8
228 #define LPASS8 0
229 #endif
230
231 #ifdef BSD4_1
232 #define LNOFLSH 0100000
233 #endif
234
235 static int baud_convert[] =
236 #ifdef BAUD_CONVERT
237 BAUD_CONVERT;
238 #else
239 {
240 0, 50, 75, 110, 135, 150, 200, 300, 600, 1200,
241 1800, 2400, 4800, 9600, 19200, 38400
242 };
243 #endif
244
245 #ifdef HAVE_SPEED_T
246 #include <termios.h>
247 #else
248 #if defined (HAVE_LIBNCURSES) && ! defined (NCURSES_OSPEED_T)
249 #else
250 #if defined (HAVE_TERMIOS_H) && defined (GNU_LINUX)
251 #include <termios.h>
252 #endif
253 #endif
254 #endif
255
256 int emacs_ospeed;
257
258 /* The file descriptor for Emacs's input terminal.
259 Under Unix, this is normally zero except when using X;
260 under VMS, we place the input channel number here. */
261 int input_fd;
262
263 void croak P_ ((char *));
264
265 #ifdef AIXHFT
266 void hft_init ();
267 void hft_reset ();
268 #endif
269
270 /* Temporary used by `sigblock' when defined in terms of signprocmask. */
271
272 SIGMASKTYPE sigprocmask_set;
273
274 \f
275 /* Specify a different file descriptor for further input operations. */
276
277 void
278 change_input_fd (fd)
279 int fd;
280 {
281 input_fd = fd;
282 }
283
284 /* Discard pending input on descriptor input_fd. */
285
286 void
287 discard_tty_input ()
288 {
289 #ifndef WINDOWSNT
290 struct emacs_tty buf;
291
292 if (noninteractive)
293 return;
294
295 /* Discarding input is not safe when the input could contain
296 replies from the X server. So don't do it. */
297 if (read_socket_hook)
298 return;
299
300 #ifdef VMS
301 end_kbd_input ();
302 SYS$QIOW (0, input_fd, IO$_READVBLK|IO$M_PURGE, input_iosb, 0, 0,
303 &buf.main, 0, 0, terminator_mask, 0, 0);
304 queue_kbd_input ();
305 #else /* not VMS */
306 #ifdef APOLLO
307 {
308 int zero = 0;
309 ioctl (input_fd, TIOCFLUSH, &zero);
310 }
311 #else /* not Apollo */
312 #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */
313 while (dos_keyread () != -1)
314 ;
315 #else /* not MSDOS */
316 EMACS_GET_TTY (input_fd, &buf);
317 EMACS_SET_TTY (input_fd, &buf, 0);
318 #endif /* not MSDOS */
319 #endif /* not Apollo */
320 #endif /* not VMS */
321 #endif /* not WINDOWSNT */
322 }
323
324 #ifdef SIGTSTP
325
326 /* Arrange for character C to be read as the next input from
327 the terminal. */
328
329 void
330 stuff_char (c)
331 char c;
332 {
333 if (read_socket_hook)
334 return;
335
336 /* Should perhaps error if in batch mode */
337 #ifdef TIOCSTI
338 ioctl (input_fd, TIOCSTI, &c);
339 #else /* no TIOCSTI */
340 error ("Cannot stuff terminal input characters in this version of Unix");
341 #endif /* no TIOCSTI */
342 }
343
344 #endif /* SIGTSTP */
345 \f
346 void
347 init_baud_rate ()
348 {
349 if (noninteractive)
350 emacs_ospeed = 0;
351 else
352 {
353 #ifdef INIT_BAUD_RATE
354 INIT_BAUD_RATE ();
355 #else
356 #ifdef DOS_NT
357 emacs_ospeed = 15;
358 #else /* not DOS_NT */
359 #ifdef VMS
360 struct sensemode sg;
361
362 SYS$QIOW (0, input_fd, IO$_SENSEMODE, &sg, 0, 0,
363 &sg.class, 12, 0, 0, 0, 0 );
364 emacs_ospeed = sg.xmit_baud;
365 #else /* not VMS */
366 #ifdef HAVE_TERMIOS
367 struct termios sg;
368
369 sg.c_cflag = B9600;
370 tcgetattr (input_fd, &sg);
371 emacs_ospeed = cfgetospeed (&sg);
372 #if defined (USE_GETOBAUD) && defined (getobaud)
373 /* m88k-motorola-sysv3 needs this (ghazi@noc.rutgers.edu) 9/1/94. */
374 if (emacs_ospeed == 0)
375 emacs_ospeed = getobaud (sg.c_cflag);
376 #endif
377 #else /* neither VMS nor TERMIOS */
378 #ifdef HAVE_TERMIO
379 struct termio sg;
380
381 sg.c_cflag = B9600;
382 #ifdef HAVE_TCATTR
383 tcgetattr (input_fd, &sg);
384 #else
385 ioctl (input_fd, TCGETA, &sg);
386 #endif
387 emacs_ospeed = sg.c_cflag & CBAUD;
388 #else /* neither VMS nor TERMIOS nor TERMIO */
389 struct sgttyb sg;
390
391 sg.sg_ospeed = B9600;
392 if (ioctl (input_fd, TIOCGETP, &sg) < 0)
393 abort ();
394 emacs_ospeed = sg.sg_ospeed;
395 #endif /* not HAVE_TERMIO */
396 #endif /* not HAVE_TERMIOS */
397 #endif /* not VMS */
398 #endif /* not DOS_NT */
399 #endif /* not INIT_BAUD_RATE */
400 }
401
402 baud_rate = (emacs_ospeed < sizeof baud_convert / sizeof baud_convert[0]
403 ? baud_convert[emacs_ospeed] : 9600);
404 if (baud_rate == 0)
405 baud_rate = 1200;
406 }
407
408 /*ARGSUSED*/
409 void
410 set_exclusive_use (fd)
411 int fd;
412 {
413 #ifdef FIOCLEX
414 ioctl (fd, FIOCLEX, 0);
415 #endif
416 /* Ok to do nothing if this feature does not exist */
417 }
418 \f
419 #ifndef subprocesses
420
421 wait_without_blocking ()
422 {
423 #ifdef BSD_SYSTEM
424 wait3 (0, WNOHANG | WUNTRACED, 0);
425 #else
426 croak ("wait_without_blocking");
427 #endif
428 synch_process_alive = 0;
429 }
430
431 #endif /* not subprocesses */
432
433 int wait_debugging; /* Set nonzero to make following function work under dbx
434 (at least for bsd). */
435
436 SIGTYPE
437 wait_for_termination_signal ()
438 {}
439
440 /* Wait for subprocess with process id `pid' to terminate and
441 make sure it will get eliminated (not remain forever as a zombie) */
442
443 void
444 wait_for_termination (pid)
445 int pid;
446 {
447 while (1)
448 {
449 #ifdef subprocesses
450 #ifdef VMS
451 int status;
452
453 status = SYS$FORCEX (&pid, 0, 0);
454 break;
455 #else /* not VMS */
456 #if defined (BSD_SYSTEM) || (defined (HPUX) && !defined (HPUX_5))
457 /* Note that kill returns -1 even if the process is just a zombie now.
458 But inevitably a SIGCHLD interrupt should be generated
459 and child_sig will do wait3 and make the process go away. */
460 /* There is some indication that there is a bug involved with
461 termination of subprocesses, perhaps involving a kernel bug too,
462 but no idea what it is. Just as a hunch we signal SIGCHLD to see
463 if that causes the problem to go away or get worse. */
464 sigsetmask (sigmask (SIGCHLD));
465 if (0 > kill (pid, 0))
466 {
467 sigsetmask (SIGEMPTYMASK);
468 kill (getpid (), SIGCHLD);
469 break;
470 }
471 if (wait_debugging)
472 sleep (1);
473 else
474 sigpause (SIGEMPTYMASK);
475 #else /* not BSD_SYSTEM, and not HPUX version >= 6 */
476 #if defined (UNIPLUS)
477 if (0 > kill (pid, 0))
478 break;
479 wait (0);
480 #else /* neither BSD_SYSTEM nor UNIPLUS: random sysV */
481 #ifdef POSIX_SIGNALS /* would this work for GNU/Linux as well? */
482 sigblock (sigmask (SIGCHLD));
483 errno = 0;
484 if (kill (pid, 0) == -1 && errno == ESRCH)
485 {
486 sigunblock (sigmask (SIGCHLD));
487 break;
488 }
489
490 sigsuspend (&empty_mask);
491 #else /* not POSIX_SIGNALS */
492 #ifdef HAVE_SYSV_SIGPAUSE
493 sighold (SIGCHLD);
494 if (0 > kill (pid, 0))
495 {
496 sigrelse (SIGCHLD);
497 break;
498 }
499 sigpause (SIGCHLD);
500 #else /* not HAVE_SYSV_SIGPAUSE */
501 #ifdef WINDOWSNT
502 wait (0);
503 break;
504 #else /* not WINDOWSNT */
505 if (0 > kill (pid, 0))
506 break;
507 /* Using sleep instead of pause avoids timing error.
508 If the inferior dies just before the sleep,
509 we lose just one second. */
510 sleep (1);
511 #endif /* not WINDOWSNT */
512 #endif /* not HAVE_SYSV_SIGPAUSE */
513 #endif /* not POSIX_SIGNALS */
514 #endif /* not UNIPLUS */
515 #endif /* not BSD_SYSTEM, and not HPUX version >= 6 */
516 #endif /* not VMS */
517 #else /* not subprocesses */
518 #if __DJGPP__ > 1
519 break;
520 #else /* not __DJGPP__ > 1 */
521 #ifndef BSD4_1
522 if (kill (pid, 0) < 0)
523 break;
524 wait (0);
525 #else /* BSD4_1 */
526 int status;
527 status = wait (0);
528 if (status == pid || status == -1)
529 break;
530 #endif /* BSD4_1 */
531 #endif /* not __DJGPP__ > 1*/
532 #endif /* not subprocesses */
533 }
534 }
535
536 #ifdef subprocesses
537
538 /*
539 * flush any pending output
540 * (may flush input as well; it does not matter the way we use it)
541 */
542
543 void
544 flush_pending_output (channel)
545 int channel;
546 {
547 #ifdef HAVE_TERMIOS
548 /* If we try this, we get hit with SIGTTIN, because
549 the child's tty belongs to the child's pgrp. */
550 #else
551 #ifdef TCFLSH
552 ioctl (channel, TCFLSH, 1);
553 #else
554 #ifdef TIOCFLUSH
555 int zero = 0;
556 /* 3rd arg should be ignored
557 but some 4.2 kernels actually want the address of an int
558 and nonzero means something different. */
559 ioctl (channel, TIOCFLUSH, &zero);
560 #endif
561 #endif
562 #endif
563 }
564 \f
565 #ifndef VMS
566 /* Set up the terminal at the other end of a pseudo-terminal that
567 we will be controlling an inferior through.
568 It should not echo or do line-editing, since that is done
569 in Emacs. No padding needed for insertion into an Emacs buffer. */
570
571 void
572 child_setup_tty (out)
573 int out;
574 {
575 #ifndef DOS_NT
576 struct emacs_tty s;
577
578 EMACS_GET_TTY (out, &s);
579
580 #if defined (HAVE_TERMIO) || defined (HAVE_TERMIOS)
581 s.main.c_oflag |= OPOST; /* Enable output postprocessing */
582 s.main.c_oflag &= ~ONLCR; /* Disable map of NL to CR-NL on output */
583 #ifdef NLDLY
584 s.main.c_oflag &= ~(NLDLY|CRDLY|TABDLY|BSDLY|VTDLY|FFDLY);
585 /* No output delays */
586 #endif
587 s.main.c_lflag &= ~ECHO; /* Disable echo */
588 s.main.c_lflag |= ISIG; /* Enable signals */
589 #if 0 /* This causes bugs in (for instance) telnet to certain sites. */
590 s.main.c_iflag &= ~ICRNL; /* Disable map of CR to NL on input */
591 #ifdef INLCR /* Just being cautious, since I can't check how
592 widespread INLCR is--rms. */
593 s.main.c_iflag &= ~INLCR; /* Disable map of NL to CR on input */
594 #endif
595 #endif
596 #ifdef IUCLC
597 s.main.c_iflag &= ~IUCLC; /* Disable downcasing on input. */
598 #endif
599 #ifdef ISTRIP
600 s.main.c_iflag &= ~ISTRIP; /* don't strip 8th bit on input */
601 #endif
602 #ifdef OLCUC
603 s.main.c_oflag &= ~OLCUC; /* Disable upcasing on output. */
604 #endif
605 s.main.c_oflag &= ~TAB3; /* Disable tab expansion */
606 s.main.c_cflag = (s.main.c_cflag & ~CSIZE) | CS8; /* Don't strip 8th bit */
607 #if 0
608 /* Said to be unnecessary: */
609 s.main.c_cc[VMIN] = 1; /* minimum number of characters to accept */
610 s.main.c_cc[VTIME] = 0; /* wait forever for at least 1 character */
611 #endif
612
613 s.main.c_lflag |= ICANON; /* Enable erase/kill and eof processing */
614 s.main.c_cc[VEOF] = 04; /* insure that EOF is Control-D */
615 s.main.c_cc[VERASE] = CDISABLE; /* disable erase processing */
616 s.main.c_cc[VKILL] = CDISABLE; /* disable kill processing */
617
618 #ifdef HPUX
619 s.main.c_cflag = (s.main.c_cflag & ~CBAUD) | B9600; /* baud rate sanity */
620 #endif /* HPUX */
621
622 #ifdef AIX
623 /* AIX enhanced edit loses NULs, so disable it */
624 #ifndef IBMR2AIX
625 s.main.c_line = 0;
626 s.main.c_iflag &= ~ASCEDIT;
627 #endif
628 /* Also, PTY overloads NUL and BREAK.
629 don't ignore break, but don't signal either, so it looks like NUL. */
630 s.main.c_iflag &= ~IGNBRK;
631 s.main.c_iflag &= ~BRKINT;
632 /* QUIT and INTR work better as signals, so disable character forms */
633 s.main.c_cc[VINTR] = 0377;
634 #ifdef SIGNALS_VIA_CHARACTERS
635 /* the QUIT and INTR character are used in process_send_signal
636 so set them here to something useful. */
637 if (s.main.c_cc[VQUIT] == 0377)
638 s.main.c_cc[VQUIT] = '\\'&037; /* Control-\ */
639 if (s.main.c_cc[VINTR] == 0377)
640 s.main.c_cc[VINTR] = 'C'&037; /* Control-C */
641 #else /* no TIOCGPGRP or no TIOCGLTC or no TIOCGETC */
642 /* QUIT and INTR work better as signals, so disable character forms */
643 s.main.c_cc[VQUIT] = 0377;
644 s.main.c_cc[VINTR] = 0377;
645 s.main.c_lflag &= ~ISIG;
646 #endif /* no TIOCGPGRP or no TIOCGLTC or no TIOCGETC */
647 s.main.c_cc[VEOL] = 0377;
648 s.main.c_cflag = (s.main.c_cflag & ~CBAUD) | B9600; /* baud rate sanity */
649 #endif /* AIX */
650
651 #else /* not HAVE_TERMIO */
652
653 s.main.sg_flags &= ~(ECHO | CRMOD | ANYP | ALLDELAY | RAW | LCASE
654 | CBREAK | TANDEM);
655 s.main.sg_flags |= LPASS8;
656 s.main.sg_erase = 0377;
657 s.main.sg_kill = 0377;
658 s.lmode = LLITOUT | s.lmode; /* Don't strip 8th bit */
659
660 #endif /* not HAVE_TERMIO */
661
662 EMACS_SET_TTY (out, &s, 0);
663
664 #ifdef BSD4_1
665 if (interrupt_input)
666 reset_sigio ();
667 #endif /* BSD4_1 */
668 #ifdef RTU
669 {
670 int zero = 0;
671 ioctl (out, FIOASYNC, &zero);
672 }
673 #endif /* RTU */
674 #endif /* not DOS_NT */
675 }
676 #endif /* not VMS */
677
678 #endif /* subprocesses */
679 \f
680 /* Record a signal code and the handler for it. */
681 struct save_signal
682 {
683 int code;
684 SIGTYPE (*handler) P_ ((int));
685 };
686
687 static void save_signal_handlers P_ ((struct save_signal *));
688 static void restore_signal_handlers P_ ((struct save_signal *));
689
690 /* Suspend the Emacs process; give terminal to its superior. */
691
692 void
693 sys_suspend ()
694 {
695 #ifdef VMS
696 /* "Foster" parentage allows emacs to return to a subprocess that attached
697 to the current emacs as a cheaper than starting a whole new process. This
698 is set up by KEPTEDITOR.COM. */
699 unsigned long parent_id, foster_parent_id;
700 char *fpid_string;
701
702 fpid_string = getenv ("EMACS_PARENT_PID");
703 if (fpid_string != NULL)
704 {
705 sscanf (fpid_string, "%x", &foster_parent_id);
706 if (foster_parent_id != 0)
707 parent_id = foster_parent_id;
708 else
709 parent_id = getppid ();
710 }
711 else
712 parent_id = getppid ();
713
714 xfree (fpid_string); /* On VMS, this was malloc'd */
715
716 if (parent_id && parent_id != 0xffffffff)
717 {
718 SIGTYPE (*oldsig)() = (int) signal (SIGINT, SIG_IGN);
719 int status = LIB$ATTACH (&parent_id) & 1;
720 signal (SIGINT, oldsig);
721 return status;
722 }
723 else
724 {
725 struct {
726 int l;
727 char *a;
728 } d_prompt;
729 d_prompt.l = sizeof ("Emacs: "); /* Our special prompt */
730 d_prompt.a = "Emacs: "; /* Just a reminder */
731 LIB$SPAWN (0, 0, 0, 0, 0, 0, 0, 0, 0, 0, &d_prompt, 0);
732 return 1;
733 }
734 return -1;
735 #else
736 #if defined (SIGTSTP) && !defined (MSDOS)
737
738 {
739 int pgrp = EMACS_GETPGRP (0);
740 EMACS_KILLPG (pgrp, SIGTSTP);
741 }
742
743 #else /* No SIGTSTP */
744 #ifdef USG_JOBCTRL /* If you don't know what this is don't mess with it */
745 ptrace (0, 0, 0, 0); /* set for ptrace - caught by csh */
746 kill (getpid (), SIGQUIT);
747
748 #else /* No SIGTSTP or USG_JOBCTRL */
749
750 /* On a system where suspending is not implemented,
751 instead fork a subshell and let it talk directly to the terminal
752 while we wait. */
753 sys_subshell ();
754
755 #endif /* no USG_JOBCTRL */
756 #endif /* no SIGTSTP */
757 #endif /* not VMS */
758 }
759
760 /* Fork a subshell. */
761
762 #ifndef MAC_OS8
763 void
764 sys_subshell ()
765 {
766 #ifndef VMS
767 #ifdef DOS_NT /* Demacs 1.1.2 91/10/20 Manabu Higashida */
768 int st;
769 char oldwd[MAXPATHLEN+1]; /* Fixed length is safe on MSDOS. */
770 #endif
771 int pid;
772 struct save_signal saved_handlers[5];
773 Lisp_Object dir;
774 unsigned char *str = 0;
775 int len;
776
777 saved_handlers[0].code = SIGINT;
778 saved_handlers[1].code = SIGQUIT;
779 saved_handlers[2].code = SIGTERM;
780 #ifdef SIGIO
781 saved_handlers[3].code = SIGIO;
782 saved_handlers[4].code = 0;
783 #else
784 saved_handlers[3].code = 0;
785 #endif
786
787 /* Mentioning current_buffer->buffer would mean including buffer.h,
788 which somehow wedges the hp compiler. So instead... */
789
790 dir = intern ("default-directory");
791 if (NILP (Fboundp (dir)))
792 goto xyzzy;
793 dir = Fsymbol_value (dir);
794 if (!STRINGP (dir))
795 goto xyzzy;
796
797 dir = expand_and_dir_to_file (Funhandled_file_name_directory (dir), Qnil);
798 str = (unsigned char *) alloca (XSTRING (dir)->size + 2);
799 len = XSTRING (dir)->size;
800 bcopy (XSTRING (dir)->data, str, len);
801 if (str[len - 1] != '/') str[len++] = '/';
802 str[len] = 0;
803 xyzzy:
804
805 #ifdef DOS_NT
806 pid = 0;
807 #if __DJGPP__ > 1
808 save_signal_handlers (saved_handlers);
809 synch_process_alive = 1;
810 #endif /* __DJGPP__ > 1 */
811 #else
812 pid = vfork ();
813 if (pid == -1)
814 error ("Can't spawn subshell");
815 #endif
816
817 if (pid == 0)
818 {
819 char *sh = 0;
820
821 #ifdef DOS_NT /* MW, Aug 1993 */
822 getwd (oldwd);
823 if (sh == 0)
824 sh = (char *) egetenv ("SUSPEND"); /* KFS, 1994-12-14 */
825 #endif
826 if (sh == 0)
827 sh = (char *) egetenv ("SHELL");
828 if (sh == 0)
829 sh = "sh";
830
831 /* Use our buffer's default directory for the subshell. */
832 if (str)
833 chdir ((char *) str);
834
835 #ifdef subprocesses
836 close_process_descs (); /* Close Emacs's pipes/ptys */
837 #endif
838
839 #ifdef SET_EMACS_PRIORITY
840 {
841 extern EMACS_INT emacs_priority;
842
843 if (emacs_priority < 0)
844 nice (-emacs_priority);
845 }
846 #endif
847
848 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */
849 {
850 char *epwd = getenv ("PWD");
851 char old_pwd[MAXPATHLEN+1+4];
852
853 /* If PWD is set, pass it with corrected value. */
854 if (epwd)
855 {
856 strcpy (old_pwd, epwd);
857 if (str[len - 1] == '/')
858 str[len - 1] = '\0';
859 setenv ("PWD", str, 1);
860 }
861 st = system (sh);
862 chdir (oldwd);
863 if (epwd)
864 putenv (old_pwd); /* restore previous value */
865 }
866 #if 0 /* This is also reported if last command executed in subshell failed, KFS */
867 if (st)
868 report_file_error ("Can't execute subshell", Fcons (build_string (sh), Qnil));
869 #endif
870 #else /* not MSDOS */
871 #ifdef WINDOWSNT
872 /* Waits for process completion */
873 pid = _spawnlp (_P_WAIT, sh, sh, NULL);
874 chdir (oldwd);
875 if (pid == -1)
876 write (1, "Can't execute subshell", 22);
877 #else /* not WINDOWSNT */
878 execlp (sh, sh, 0);
879 write (1, "Can't execute subshell", 22);
880 _exit (1);
881 #endif /* not WINDOWSNT */
882 #endif /* not MSDOS */
883 }
884
885 /* Do this now if we did not do it before. */
886 #if !defined (MSDOS) || __DJGPP__ == 1
887 save_signal_handlers (saved_handlers);
888 synch_process_alive = 1;
889 #endif
890
891 #ifndef DOS_NT
892 wait_for_termination (pid);
893 #endif
894 restore_signal_handlers (saved_handlers);
895 synch_process_alive = 0;
896 #endif /* !VMS */
897 }
898 #endif /* !MAC_OS8 */
899
900 static void
901 save_signal_handlers (saved_handlers)
902 struct save_signal *saved_handlers;
903 {
904 while (saved_handlers->code)
905 {
906 saved_handlers->handler
907 = (SIGTYPE (*) P_ ((int))) signal (saved_handlers->code, SIG_IGN);
908 saved_handlers++;
909 }
910 }
911
912 static void
913 restore_signal_handlers (saved_handlers)
914 struct save_signal *saved_handlers;
915 {
916 while (saved_handlers->code)
917 {
918 signal (saved_handlers->code, saved_handlers->handler);
919 saved_handlers++;
920 }
921 }
922 \f
923 #ifdef F_SETFL
924
925 int old_fcntl_flags;
926
927 void
928 init_sigio (fd)
929 int fd;
930 {
931 #ifdef FASYNC
932 old_fcntl_flags = fcntl (fd, F_GETFL, 0) & ~FASYNC;
933 fcntl (fd, F_SETFL, old_fcntl_flags | FASYNC);
934 #endif
935 interrupts_deferred = 0;
936 }
937
938 void
939 reset_sigio ()
940 {
941 unrequest_sigio ();
942 }
943
944 #ifdef FASYNC /* F_SETFL does not imply existence of FASYNC */
945
946 void
947 request_sigio ()
948 {
949 if (read_socket_hook)
950 return;
951
952 #ifdef SIGWINCH
953 sigunblock (sigmask (SIGWINCH));
954 #endif
955 fcntl (input_fd, F_SETFL, old_fcntl_flags | FASYNC);
956
957 interrupts_deferred = 0;
958 }
959
960 void
961 unrequest_sigio ()
962 {
963 if (read_socket_hook)
964 return;
965
966 #ifdef SIGWINCH
967 sigblock (sigmask (SIGWINCH));
968 #endif
969 fcntl (input_fd, F_SETFL, old_fcntl_flags);
970 interrupts_deferred = 1;
971 }
972
973 #else /* no FASYNC */
974 #ifdef STRIDE /* Stride doesn't have FASYNC - use FIOASYNC */
975
976 void
977 request_sigio ()
978 {
979 int on = 1;
980
981 if (read_socket_hook)
982 return;
983
984 ioctl (input_fd, FIOASYNC, &on);
985 interrupts_deferred = 0;
986 }
987
988 void
989 unrequest_sigio ()
990 {
991 int off = 0;
992
993 if (read_socket_hook)
994 return;
995
996 ioctl (input_fd, FIOASYNC, &off);
997 interrupts_deferred = 1;
998 }
999
1000 #else /* not FASYNC, not STRIDE */
1001
1002 #ifdef _CX_UX
1003
1004 #include <termios.h>
1005
1006 void
1007 request_sigio ()
1008 {
1009 int on = 1;
1010 sigset_t st;
1011
1012 if (read_socket_hook)
1013 return;
1014
1015 sigemptyset (&st);
1016 sigaddset (&st, SIGIO);
1017 ioctl (input_fd, FIOASYNC, &on);
1018 interrupts_deferred = 0;
1019 sigprocmask (SIG_UNBLOCK, &st, (sigset_t *)0);
1020 }
1021
1022 void
1023 unrequest_sigio ()
1024 {
1025 int off = 0;
1026
1027 if (read_socket_hook)
1028 return;
1029
1030 ioctl (input_fd, FIOASYNC, &off);
1031 interrupts_deferred = 1;
1032 }
1033
1034 #else /* ! _CX_UX */
1035
1036 void
1037 request_sigio ()
1038 {
1039 if (read_socket_hook)
1040 return;
1041
1042 croak ("request_sigio");
1043 }
1044
1045 void
1046 unrequest_sigio ()
1047 {
1048 if (read_socket_hook)
1049 return;
1050
1051 croak ("unrequest_sigio");
1052 }
1053
1054 #endif /* _CX_UX */
1055 #endif /* STRIDE */
1056 #endif /* FASYNC */
1057 #endif /* F_SETFL */
1058 \f
1059 /* Saving and restoring the process group of Emacs's terminal. */
1060
1061 #ifdef BSD_PGRPS
1062
1063 /* The process group of which Emacs was a member when it initially
1064 started.
1065
1066 If Emacs was in its own process group (i.e. inherited_pgroup ==
1067 getpid ()), then we know we're running under a shell with job
1068 control (Emacs would never be run as part of a pipeline).
1069 Everything is fine.
1070
1071 If Emacs was not in its own process group, then we know we're
1072 running under a shell (or a caller) that doesn't know how to
1073 separate itself from Emacs (like sh). Emacs must be in its own
1074 process group in order to receive SIGIO correctly. In this
1075 situation, we put ourselves in our own pgroup, forcibly set the
1076 tty's pgroup to our pgroup, and make sure to restore and reinstate
1077 the tty's pgroup just like any other terminal setting. If
1078 inherited_group was not the tty's pgroup, then we'll get a
1079 SIGTTmumble when we try to change the tty's pgroup, and a CONT if
1080 it goes foreground in the future, which is what should happen. */
1081 int inherited_pgroup;
1082
1083 /* Split off the foreground process group to Emacs alone.
1084 When we are in the foreground, but not started in our own process
1085 group, redirect the TTY to point to our own process group. We need
1086 to be in our own process group to receive SIGIO properly. */
1087 void
1088 narrow_foreground_group ()
1089 {
1090 int me = getpid ();
1091
1092 setpgrp (0, inherited_pgroup);
1093 if (inherited_pgroup != me)
1094 EMACS_SET_TTY_PGRP (input_fd, &me);
1095 setpgrp (0, me);
1096 }
1097
1098 /* Set the tty to our original foreground group. */
1099 void
1100 widen_foreground_group ()
1101 {
1102 if (inherited_pgroup != getpid ())
1103 EMACS_SET_TTY_PGRP (input_fd, &inherited_pgroup);
1104 setpgrp (0, inherited_pgroup);
1105 }
1106
1107 #endif /* BSD_PGRPS */
1108 \f
1109 /* Getting and setting emacs_tty structures. */
1110
1111 /* Set *TC to the parameters associated with the terminal FD.
1112 Return zero if all's well, or -1 if we ran into an error we
1113 couldn't deal with. */
1114 int
1115 emacs_get_tty (fd, settings)
1116 int fd;
1117 struct emacs_tty *settings;
1118 {
1119 /* Retrieve the primary parameters - baud rate, character size, etcetera. */
1120 #ifdef HAVE_TCATTR
1121 /* We have those nifty POSIX tcmumbleattr functions. */
1122 bzero (&settings->main, sizeof (settings->main));
1123 if (tcgetattr (fd, &settings->main) < 0)
1124 return -1;
1125
1126 #else
1127 #ifdef HAVE_TERMIO
1128 /* The SYSV-style interface? */
1129 if (ioctl (fd, TCGETA, &settings->main) < 0)
1130 return -1;
1131
1132 #else
1133 #ifdef VMS
1134 /* Vehemently Monstrous System? :-) */
1135 if (! (SYS$QIOW (0, fd, IO$_SENSEMODE, settings, 0, 0,
1136 &settings->main.class, 12, 0, 0, 0, 0)
1137 & 1))
1138 return -1;
1139
1140 #else
1141 #ifndef DOS_NT
1142 /* I give up - I hope you have the BSD ioctls. */
1143 if (ioctl (fd, TIOCGETP, &settings->main) < 0)
1144 return -1;
1145 #endif /* not DOS_NT */
1146 #endif
1147 #endif
1148 #endif
1149
1150 /* Suivant - Do we have to get struct ltchars data? */
1151 #ifdef HAVE_LTCHARS
1152 if (ioctl (fd, TIOCGLTC, &settings->ltchars) < 0)
1153 return -1;
1154 #endif
1155
1156 /* How about a struct tchars and a wordful of lmode bits? */
1157 #ifdef HAVE_TCHARS
1158 if (ioctl (fd, TIOCGETC, &settings->tchars) < 0
1159 || ioctl (fd, TIOCLGET, &settings->lmode) < 0)
1160 return -1;
1161 #endif
1162
1163 /* We have survived the tempest. */
1164 return 0;
1165 }
1166
1167
1168 /* Set the parameters of the tty on FD according to the contents of
1169 *SETTINGS. If FLUSHP is non-zero, we discard input.
1170 Return 0 if all went well, and -1 if anything failed. */
1171
1172 int
1173 emacs_set_tty (fd, settings, flushp)
1174 int fd;
1175 struct emacs_tty *settings;
1176 int flushp;
1177 {
1178 /* Set the primary parameters - baud rate, character size, etcetera. */
1179 #ifdef HAVE_TCATTR
1180 int i;
1181 /* We have those nifty POSIX tcmumbleattr functions.
1182 William J. Smith <wjs@wiis.wang.com> writes:
1183 "POSIX 1003.1 defines tcsetattr to return success if it was
1184 able to perform any of the requested actions, even if some
1185 of the requested actions could not be performed.
1186 We must read settings back to ensure tty setup properly.
1187 AIX requires this to keep tty from hanging occasionally." */
1188 /* This make sure that we don't loop indefinitely in here. */
1189 for (i = 0 ; i < 10 ; i++)
1190 if (tcsetattr (fd, flushp ? TCSAFLUSH : TCSADRAIN, &settings->main) < 0)
1191 {
1192 if (errno == EINTR)
1193 continue;
1194 else
1195 return -1;
1196 }
1197 else
1198 {
1199 struct termios new;
1200
1201 bzero (&new, sizeof (new));
1202 /* Get the current settings, and see if they're what we asked for. */
1203 tcgetattr (fd, &new);
1204 /* We cannot use memcmp on the whole structure here because under
1205 * aix386 the termios structure has some reserved field that may
1206 * not be filled in.
1207 */
1208 if ( new.c_iflag == settings->main.c_iflag
1209 && new.c_oflag == settings->main.c_oflag
1210 && new.c_cflag == settings->main.c_cflag
1211 && new.c_lflag == settings->main.c_lflag
1212 && memcmp (new.c_cc, settings->main.c_cc, NCCS) == 0)
1213 break;
1214 else
1215 continue;
1216 }
1217
1218 #else
1219 #ifdef HAVE_TERMIO
1220 /* The SYSV-style interface? */
1221 if (ioctl (fd, flushp ? TCSETAF : TCSETAW, &settings->main) < 0)
1222 return -1;
1223
1224 #else
1225 #ifdef VMS
1226 /* Vehemently Monstrous System? :-) */
1227 if (! (SYS$QIOW (0, fd, IO$_SETMODE, &input_iosb, 0, 0,
1228 &settings->main.class, 12, 0, 0, 0, 0)
1229 & 1))
1230 return -1;
1231
1232 #else
1233 #ifndef DOS_NT
1234 /* I give up - I hope you have the BSD ioctls. */
1235 if (ioctl (fd, (flushp) ? TIOCSETP : TIOCSETN, &settings->main) < 0)
1236 return -1;
1237 #endif /* not DOS_NT */
1238
1239 #endif
1240 #endif
1241 #endif
1242
1243 /* Suivant - Do we have to get struct ltchars data? */
1244 #ifdef HAVE_LTCHARS
1245 if (ioctl (fd, TIOCSLTC, &settings->ltchars) < 0)
1246 return -1;
1247 #endif
1248
1249 /* How about a struct tchars and a wordful of lmode bits? */
1250 #ifdef HAVE_TCHARS
1251 if (ioctl (fd, TIOCSETC, &settings->tchars) < 0
1252 || ioctl (fd, TIOCLSET, &settings->lmode) < 0)
1253 return -1;
1254 #endif
1255
1256 /* We have survived the tempest. */
1257 return 0;
1258 }
1259
1260 \f
1261 /* The initial tty mode bits */
1262 struct emacs_tty old_tty;
1263
1264 /* 1 if we have been through init_sys_modes. */
1265 int term_initted;
1266
1267 /* 1 if outer tty status has been recorded. */
1268 int old_tty_valid;
1269
1270 #ifdef BSD4_1
1271 /* BSD 4.1 needs to keep track of the lmode bits in order to start
1272 sigio. */
1273 int lmode;
1274 #endif
1275
1276 #ifndef F_SETOWN_BUG
1277 #ifdef F_SETOWN
1278 int old_fcntl_owner;
1279 #endif /* F_SETOWN */
1280 #endif /* F_SETOWN_BUG */
1281
1282 /* This may also be defined in stdio,
1283 but if so, this does no harm,
1284 and using the same name avoids wasting the other one's space. */
1285
1286 #ifdef nec_ews_svr4
1287 extern char *_sobuf ;
1288 #else
1289 #if defined (USG) || defined (DGUX)
1290 unsigned char _sobuf[BUFSIZ+8];
1291 #else
1292 char _sobuf[BUFSIZ];
1293 #endif
1294 #endif
1295
1296 #ifdef HAVE_LTCHARS
1297 static struct ltchars new_ltchars = {-1,-1,-1,-1,-1,-1};
1298 #endif
1299 #ifdef HAVE_TCHARS
1300 static struct tchars new_tchars = {-1,-1,-1,-1,-1,-1};
1301 #endif
1302
1303 void
1304 init_sys_modes ()
1305 {
1306 struct emacs_tty tty;
1307
1308 #ifdef MAC_OS8
1309 /* cus-start.el complains if delete-exited-processes is not defined */
1310 #ifndef subprocesses
1311 DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes,
1312 doc: /* *Non-nil means delete processes immediately when they exit.
1313 nil means don't delete them until `list-processes' is run. */);
1314 delete_exited_processes = 0;
1315 #endif
1316 #endif /* MAC_OS8 */
1317
1318 #ifdef VMS
1319 #if 0
1320 static int oob_chars[2] = {0, 1 << 7}; /* catch C-g's */
1321 extern int (*interrupt_signal) ();
1322 #endif
1323 #endif
1324
1325 Vtty_erase_char = Qnil;
1326
1327 if (noninteractive)
1328 return;
1329
1330 #ifdef VMS
1331 if (!input_ef)
1332 input_ef = get_kbd_event_flag ();
1333 /* LIB$GET_EF (&input_ef); */
1334 SYS$CLREF (input_ef);
1335 waiting_for_ast = 0;
1336 if (!timer_ef)
1337 timer_ef = get_timer_event_flag ();
1338 /* LIB$GET_EF (&timer_ef); */
1339 SYS$CLREF (timer_ef);
1340 #if 0
1341 if (!process_ef)
1342 {
1343 LIB$GET_EF (&process_ef);
1344 SYS$CLREF (process_ef);
1345 }
1346 if (input_ef / 32 != process_ef / 32)
1347 croak ("Input and process event flags in different clusters.");
1348 #endif
1349 if (input_ef / 32 != timer_ef / 32)
1350 croak ("Input and timer event flags in different clusters.");
1351 #if 0
1352 input_eflist = ((unsigned) 1 << (input_ef % 32)) |
1353 ((unsigned) 1 << (process_ef % 32));
1354 #endif
1355 timer_eflist = ((unsigned) 1 << (input_ef % 32)) |
1356 ((unsigned) 1 << (timer_ef % 32));
1357 #ifndef VMS4_4
1358 sys_access_reinit ();
1359 #endif
1360 #endif /* not VMS */
1361
1362 #ifdef BSD_PGRPS
1363 if (! read_socket_hook && EQ (Vwindow_system, Qnil))
1364 narrow_foreground_group ();
1365 #endif
1366
1367 #ifdef HAVE_WINDOW_SYSTEM
1368 /* Emacs' window system on MSDOG uses the `internal terminal' and therefore
1369 needs the initialization code below. */
1370 if (!read_socket_hook && EQ (Vwindow_system, Qnil))
1371 #endif
1372 {
1373 EMACS_GET_TTY (input_fd, &old_tty);
1374
1375 old_tty_valid = 1;
1376
1377 tty = old_tty;
1378
1379 #if defined (HAVE_TERMIO) || defined (HAVE_TERMIOS)
1380 XSETINT (Vtty_erase_char, old_tty.main.c_cc[VERASE]);
1381
1382 #ifdef DGUX
1383 /* This allows meta to be sent on 8th bit. */
1384 tty.main.c_iflag &= ~INPCK; /* don't check input for parity */
1385 #endif
1386 tty.main.c_iflag |= (IGNBRK); /* Ignore break condition */
1387 tty.main.c_iflag &= ~ICRNL; /* Disable map of CR to NL on input */
1388 #ifdef INLCR /* I'm just being cautious,
1389 since I can't check how widespread INLCR is--rms. */
1390 tty.main.c_iflag &= ~INLCR; /* Disable map of NL to CR on input */
1391 #endif
1392 #ifdef ISTRIP
1393 tty.main.c_iflag &= ~ISTRIP; /* don't strip 8th bit on input */
1394 #endif
1395 tty.main.c_lflag &= ~ECHO; /* Disable echo */
1396 tty.main.c_lflag &= ~ICANON; /* Disable erase/kill processing */
1397 #ifdef IEXTEN
1398 tty.main.c_lflag &= ~IEXTEN; /* Disable other editing characters. */
1399 #endif
1400 tty.main.c_lflag |= ISIG; /* Enable signals */
1401 if (flow_control)
1402 {
1403 tty.main.c_iflag |= IXON; /* Enable start/stop output control */
1404 #ifdef IXANY
1405 tty.main.c_iflag &= ~IXANY;
1406 #endif /* IXANY */
1407 }
1408 else
1409 tty.main.c_iflag &= ~IXON; /* Disable start/stop output control */
1410 tty.main.c_oflag &= ~ONLCR; /* Disable map of NL to CR-NL
1411 on output */
1412 tty.main.c_oflag &= ~TAB3; /* Disable tab expansion */
1413 #ifdef CS8
1414 if (meta_key)
1415 {
1416 tty.main.c_cflag |= CS8; /* allow 8th bit on input */
1417 tty.main.c_cflag &= ~PARENB;/* Don't check parity */
1418 }
1419 #endif
1420 tty.main.c_cc[VINTR] = quit_char; /* C-g (usually) gives SIGINT */
1421 /* Set up C-g for both SIGQUIT and SIGINT.
1422 We don't know which we will get, but we handle both alike
1423 so which one it really gives us does not matter. */
1424 tty.main.c_cc[VQUIT] = quit_char;
1425 tty.main.c_cc[VMIN] = 1; /* Input should wait for at least 1 char */
1426 tty.main.c_cc[VTIME] = 0; /* no matter how long that takes. */
1427 #ifdef VSWTCH
1428 tty.main.c_cc[VSWTCH] = CDISABLE; /* Turn off shell layering use
1429 of C-z */
1430 #endif /* VSWTCH */
1431
1432 #if defined (mips) || defined (HAVE_TCATTR)
1433 #ifdef VSUSP
1434 tty.main.c_cc[VSUSP] = CDISABLE; /* Turn off mips handling of C-z. */
1435 #endif /* VSUSP */
1436 #ifdef V_DSUSP
1437 tty.main.c_cc[V_DSUSP] = CDISABLE; /* Turn off mips handling of C-y. */
1438 #endif /* V_DSUSP */
1439 #ifdef VDSUSP /* Some systems have VDSUSP, some have V_DSUSP. */
1440 tty.main.c_cc[VDSUSP] = CDISABLE;
1441 #endif /* VDSUSP */
1442 #ifdef VLNEXT
1443 tty.main.c_cc[VLNEXT] = CDISABLE;
1444 #endif /* VLNEXT */
1445 #ifdef VREPRINT
1446 tty.main.c_cc[VREPRINT] = CDISABLE;
1447 #endif /* VREPRINT */
1448 #ifdef VWERASE
1449 tty.main.c_cc[VWERASE] = CDISABLE;
1450 #endif /* VWERASE */
1451 #ifdef VDISCARD
1452 tty.main.c_cc[VDISCARD] = CDISABLE;
1453 #endif /* VDISCARD */
1454
1455 if (flow_control)
1456 {
1457 #ifdef VSTART
1458 tty.main.c_cc[VSTART] = '\021';
1459 #endif /* VSTART */
1460 #ifdef VSTOP
1461 tty.main.c_cc[VSTOP] = '\023';
1462 #endif /* VSTOP */
1463 }
1464 else
1465 {
1466 #ifdef VSTART
1467 tty.main.c_cc[VSTART] = CDISABLE;
1468 #endif /* VSTART */
1469 #ifdef VSTOP
1470 tty.main.c_cc[VSTOP] = CDISABLE;
1471 #endif /* VSTOP */
1472 }
1473 #endif /* mips or HAVE_TCATTR */
1474
1475 #ifdef SET_LINE_DISCIPLINE
1476 /* Need to explicitly request TERMIODISC line discipline or
1477 Ultrix's termios does not work correctly. */
1478 tty.main.c_line = SET_LINE_DISCIPLINE;
1479 #endif
1480 #ifdef AIX
1481 #ifndef IBMR2AIX
1482 /* AIX enhanced edit loses NULs, so disable it. */
1483 tty.main.c_line = 0;
1484 tty.main.c_iflag &= ~ASCEDIT;
1485 #else
1486 tty.main.c_cc[VSTRT] = 255;
1487 tty.main.c_cc[VSTOP] = 255;
1488 tty.main.c_cc[VSUSP] = 255;
1489 tty.main.c_cc[VDSUSP] = 255;
1490 #endif /* IBMR2AIX */
1491 if (flow_control)
1492 {
1493 #ifdef VSTART
1494 tty.main.c_cc[VSTART] = '\021';
1495 #endif /* VSTART */
1496 #ifdef VSTOP
1497 tty.main.c_cc[VSTOP] = '\023';
1498 #endif /* VSTOP */
1499 }
1500 /* Also, PTY overloads NUL and BREAK.
1501 don't ignore break, but don't signal either, so it looks like NUL.
1502 This really serves a purpose only if running in an XTERM window
1503 or via TELNET or the like, but does no harm elsewhere. */
1504 tty.main.c_iflag &= ~IGNBRK;
1505 tty.main.c_iflag &= ~BRKINT;
1506 #endif
1507 #else /* if not HAVE_TERMIO */
1508 #ifdef VMS
1509 tty.main.tt_char |= TT$M_NOECHO;
1510 if (meta_key)
1511 tty.main.tt_char |= TT$M_EIGHTBIT;
1512 if (flow_control)
1513 tty.main.tt_char |= TT$M_TTSYNC;
1514 else
1515 tty.main.tt_char &= ~TT$M_TTSYNC;
1516 tty.main.tt2_char |= TT2$M_PASTHRU | TT2$M_XON;
1517 #else /* not VMS (BSD, that is) */
1518 #ifndef DOS_NT
1519 XSETINT (Vtty_erase_char, tty.main.sg_erase);
1520 tty.main.sg_flags &= ~(ECHO | CRMOD | XTABS);
1521 if (meta_key)
1522 tty.main.sg_flags |= ANYP;
1523 tty.main.sg_flags |= interrupt_input ? RAW : CBREAK;
1524 #endif /* not DOS_NT */
1525 #endif /* not VMS (BSD, that is) */
1526 #endif /* not HAVE_TERMIO */
1527
1528 /* If going to use CBREAK mode, we must request C-g to interrupt
1529 and turn off start and stop chars, etc. If not going to use
1530 CBREAK mode, do this anyway so as to turn off local flow
1531 control for user coming over network on 4.2; in this case,
1532 only t_stopc and t_startc really matter. */
1533 #ifndef HAVE_TERMIO
1534 #ifdef HAVE_TCHARS
1535 /* Note: if not using CBREAK mode, it makes no difference how we
1536 set this */
1537 tty.tchars = new_tchars;
1538 tty.tchars.t_intrc = quit_char;
1539 if (flow_control)
1540 {
1541 tty.tchars.t_startc = '\021';
1542 tty.tchars.t_stopc = '\023';
1543 }
1544
1545 tty.lmode = LDECCTQ | LLITOUT | LPASS8 | LNOFLSH | old_tty.lmode;
1546 #ifdef ultrix
1547 /* Under Ultrix 4.2a, leaving this out doesn't seem to hurt
1548 anything, and leaving it in breaks the meta key. Go figure. */
1549 tty.lmode &= ~LLITOUT;
1550 #endif
1551
1552 #ifdef BSD4_1
1553 lmode = tty.lmode;
1554 #endif
1555
1556 #endif /* HAVE_TCHARS */
1557 #endif /* not HAVE_TERMIO */
1558
1559 #ifdef HAVE_LTCHARS
1560 tty.ltchars = new_ltchars;
1561 #endif /* HAVE_LTCHARS */
1562 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida, MW Aug 1993 */
1563 if (!term_initted)
1564 internal_terminal_init ();
1565 dos_ttraw ();
1566 #endif
1567
1568 EMACS_SET_TTY (input_fd, &tty, 0);
1569
1570 /* This code added to insure that, if flow-control is not to be used,
1571 we have an unlocked terminal at the start. */
1572
1573 #ifdef TCXONC
1574 if (!flow_control) ioctl (input_fd, TCXONC, 1);
1575 #endif
1576 #ifndef APOLLO
1577 #ifdef TIOCSTART
1578 if (!flow_control) ioctl (input_fd, TIOCSTART, 0);
1579 #endif
1580 #endif
1581
1582 #if defined (HAVE_TERMIOS) || defined (HPUX9)
1583 #ifdef TCOON
1584 if (!flow_control) tcflow (input_fd, TCOON);
1585 #endif
1586 #endif
1587
1588 #ifdef AIXHFT
1589 hft_init ();
1590 #ifdef IBMR2AIX
1591 {
1592 /* IBM's HFT device usually thinks a ^J should be LF/CR. We need it
1593 to be only LF. This is the way that is done. */
1594 struct termio tty;
1595
1596 if (ioctl (1, HFTGETID, &tty) != -1)
1597 write (1, "\033[20l", 5);
1598 }
1599 #endif
1600 #endif /* AIXHFT */
1601
1602 #ifdef VMS
1603 /* Appears to do nothing when in PASTHRU mode.
1604 SYS$QIOW (0, input_fd, IO$_SETMODE|IO$M_OUTBAND, 0, 0, 0,
1605 interrupt_signal, oob_chars, 0, 0, 0, 0);
1606 */
1607 queue_kbd_input (0);
1608 #endif /* VMS */
1609 }
1610
1611 #ifdef F_SETFL
1612 #ifndef F_SETOWN_BUG
1613 #ifdef F_GETOWN /* F_SETFL does not imply existence of F_GETOWN */
1614 if (interrupt_input
1615 && ! read_socket_hook && EQ (Vwindow_system, Qnil))
1616 {
1617 old_fcntl_owner = fcntl (input_fd, F_GETOWN, 0);
1618 fcntl (input_fd, F_SETOWN, getpid ());
1619 init_sigio (input_fd);
1620 }
1621 #endif /* F_GETOWN */
1622 #endif /* F_SETOWN_BUG */
1623 #endif /* F_SETFL */
1624
1625 #ifdef BSD4_1
1626 if (interrupt_input)
1627 init_sigio (input_fd);
1628 #endif
1629
1630 #ifdef VMS /* VMS sometimes has this symbol but lacks setvbuf. */
1631 #undef _IOFBF
1632 #endif
1633 #ifdef _IOFBF
1634 /* This symbol is defined on recent USG systems.
1635 Someone says without this call USG won't really buffer the file
1636 even with a call to setbuf. */
1637 setvbuf (stdout, (char *) _sobuf, _IOFBF, sizeof _sobuf);
1638 #else
1639 setbuf (stdout, (char *) _sobuf);
1640 #endif
1641 #ifdef HAVE_WINDOW_SYSTEM
1642 /* Emacs' window system on MSDOG uses the `internal terminal' and therefore
1643 needs the initialization code below. */
1644 if (EQ (Vwindow_system, Qnil)
1645 #ifndef WINDOWSNT
1646 /* When running in tty mode on NT/Win95, we have a read_socket
1647 hook, but still need the rest of the initialization code below. */
1648 && (! read_socket_hook)
1649 #endif
1650 )
1651 #endif
1652 set_terminal_modes ();
1653
1654 if (!term_initted
1655 && FRAMEP (Vterminal_frame)
1656 && FRAME_TERMCAP_P (XFRAME (Vterminal_frame)))
1657 init_frame_faces (XFRAME (Vterminal_frame));
1658
1659 if (term_initted && no_redraw_on_reenter)
1660 {
1661 if (display_completed)
1662 direct_output_forward_char (0);
1663 }
1664 else
1665 {
1666 frame_garbaged = 1;
1667 if (FRAMEP (Vterminal_frame))
1668 FRAME_GARBAGED_P (XFRAME (Vterminal_frame)) = 1;
1669 }
1670
1671 term_initted = 1;
1672 }
1673
1674 /* Return nonzero if safe to use tabs in output.
1675 At the time this is called, init_sys_modes has not been done yet. */
1676
1677 int
1678 tabs_safe_p ()
1679 {
1680 struct emacs_tty tty;
1681
1682 EMACS_GET_TTY (input_fd, &tty);
1683 return EMACS_TTY_TABS_OK (&tty);
1684 }
1685 \f
1686 /* Get terminal size from system.
1687 Store number of lines into *HEIGHTP and width into *WIDTHP.
1688 We store 0 if there's no valid information. */
1689
1690 void
1691 get_frame_size (widthp, heightp)
1692 int *widthp, *heightp;
1693 {
1694
1695 #ifdef TIOCGWINSZ
1696
1697 /* BSD-style. */
1698 struct winsize size;
1699
1700 if (ioctl (input_fd, TIOCGWINSZ, &size) == -1)
1701 *widthp = *heightp = 0;
1702 else
1703 {
1704 *widthp = size.ws_col;
1705 *heightp = size.ws_row;
1706 }
1707
1708 #else
1709 #ifdef TIOCGSIZE
1710
1711 /* SunOS - style. */
1712 struct ttysize size;
1713
1714 if (ioctl (input_fd, TIOCGSIZE, &size) == -1)
1715 *widthp = *heightp = 0;
1716 else
1717 {
1718 *widthp = size.ts_cols;
1719 *heightp = size.ts_lines;
1720 }
1721
1722 #else
1723 #ifdef VMS
1724
1725 struct sensemode tty;
1726
1727 SYS$QIOW (0, input_fd, IO$_SENSEMODE, &tty, 0, 0,
1728 &tty.class, 12, 0, 0, 0, 0);
1729 *widthp = tty.scr_wid;
1730 *heightp = tty.scr_len;
1731
1732 #else
1733 #ifdef MSDOS
1734 *widthp = ScreenCols ();
1735 *heightp = ScreenRows ();
1736 #else /* system doesn't know size */
1737 *widthp = 0;
1738 *heightp = 0;
1739 #endif
1740
1741 #endif /* not VMS */
1742 #endif /* not SunOS-style */
1743 #endif /* not BSD-style */
1744 }
1745
1746 /* Set the logical window size associated with descriptor FD
1747 to HEIGHT and WIDTH. This is used mainly with ptys. */
1748
1749 int
1750 set_window_size (fd, height, width)
1751 int fd, height, width;
1752 {
1753 #ifdef TIOCSWINSZ
1754
1755 /* BSD-style. */
1756 struct winsize size;
1757 size.ws_row = height;
1758 size.ws_col = width;
1759
1760 if (ioctl (fd, TIOCSWINSZ, &size) == -1)
1761 return 0; /* error */
1762 else
1763 return 1;
1764
1765 #else
1766 #ifdef TIOCSSIZE
1767
1768 /* SunOS - style. */
1769 struct ttysize size;
1770 size.ts_lines = height;
1771 size.ts_cols = width;
1772
1773 if (ioctl (fd, TIOCGSIZE, &size) == -1)
1774 return 0;
1775 else
1776 return 1;
1777 #else
1778 return -1;
1779 #endif /* not SunOS-style */
1780 #endif /* not BSD-style */
1781 }
1782
1783 \f
1784 /* Prepare the terminal for exiting Emacs; move the cursor to the
1785 bottom of the frame, turn off interrupt-driven I/O, etc. */
1786 void
1787 reset_sys_modes ()
1788 {
1789 struct frame *sf;
1790
1791 if (noninteractive)
1792 {
1793 fflush (stdout);
1794 return;
1795 }
1796 if (!term_initted)
1797 return;
1798 #ifdef HAVE_WINDOW_SYSTEM
1799 /* Emacs' window system on MSDOG uses the `internal terminal' and therefore
1800 needs the clean-up code below. */
1801 if (!EQ (Vwindow_system, Qnil)
1802 #ifndef WINDOWSNT
1803 /* When running in tty mode on NT/Win95, we have a read_socket
1804 hook, but still need the rest of the clean-up code below. */
1805 || read_socket_hook
1806 #endif
1807 )
1808 return;
1809 #endif
1810 sf = SELECTED_FRAME ();
1811 cursor_to (FRAME_HEIGHT (sf) - 1, 0);
1812 clear_end_of_line (FRAME_WIDTH (sf));
1813 /* clear_end_of_line may move the cursor */
1814 cursor_to (FRAME_HEIGHT (sf) - 1, 0);
1815 #if defined (IBMR2AIX) && defined (AIXHFT)
1816 {
1817 /* HFT devices normally use ^J as a LF/CR. We forced it to
1818 do the LF only. Now, we need to reset it. */
1819 struct termio tty;
1820
1821 if (ioctl (1, HFTGETID, &tty) != -1)
1822 write (1, "\033[20h", 5);
1823 }
1824 #endif
1825
1826 reset_terminal_modes ();
1827 fflush (stdout);
1828 #ifdef BSD_SYSTEM
1829 #ifndef BSD4_1
1830 /* Avoid possible loss of output when changing terminal modes. */
1831 fsync (fileno (stdout));
1832 #endif
1833 #endif
1834
1835 #ifdef F_SETFL
1836 #ifndef F_SETOWN_BUG
1837 #ifdef F_SETOWN /* F_SETFL does not imply existence of F_SETOWN */
1838 if (interrupt_input)
1839 {
1840 reset_sigio ();
1841 fcntl (input_fd, F_SETOWN, old_fcntl_owner);
1842 }
1843 #endif /* F_SETOWN */
1844 #endif /* F_SETOWN_BUG */
1845 #ifdef O_NDELAY
1846 fcntl (input_fd, F_SETFL, fcntl (input_fd, F_GETFL, 0) & ~O_NDELAY);
1847 #endif
1848 #endif /* F_SETFL */
1849 #ifdef BSD4_1
1850 if (interrupt_input)
1851 reset_sigio ();
1852 #endif /* BSD4_1 */
1853
1854 if (old_tty_valid)
1855 while (EMACS_SET_TTY (input_fd, &old_tty, 0) < 0 && errno == EINTR)
1856 ;
1857
1858 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */
1859 dos_ttcooked ();
1860 #endif
1861
1862 #ifdef SET_LINE_DISCIPLINE
1863 /* Ultrix's termios *ignores* any line discipline except TERMIODISC.
1864 A different old line discipline is therefore not restored, yet.
1865 Restore the old line discipline by hand. */
1866 ioctl (0, TIOCSETD, &old_tty.main.c_line);
1867 #endif
1868
1869 #ifdef AIXHFT
1870 hft_reset ();
1871 #endif
1872
1873 #ifdef BSD_PGRPS
1874 widen_foreground_group ();
1875 #endif
1876 }
1877 \f
1878 #ifdef HAVE_PTYS
1879
1880 /* Set up the proper status flags for use of a pty. */
1881
1882 void
1883 setup_pty (fd)
1884 int fd;
1885 {
1886 /* I'm told that TOICREMOTE does not mean control chars
1887 "can't be sent" but rather that they don't have
1888 input-editing or signaling effects.
1889 That should be good, because we have other ways
1890 to do those things in Emacs.
1891 However, telnet mode seems not to work on 4.2.
1892 So TIOCREMOTE is turned off now. */
1893
1894 /* Under hp-ux, if TIOCREMOTE is turned on, some calls
1895 will hang. In particular, the "timeout" feature (which
1896 causes a read to return if there is no data available)
1897 does this. Also it is known that telnet mode will hang
1898 in such a way that Emacs must be stopped (perhaps this
1899 is the same problem).
1900
1901 If TIOCREMOTE is turned off, then there is a bug in
1902 hp-ux which sometimes loses data. Apparently the
1903 code which blocks the master process when the internal
1904 buffer fills up does not work. Other than this,
1905 though, everything else seems to work fine.
1906
1907 Since the latter lossage is more benign, we may as well
1908 lose that way. -- cph */
1909 #ifdef FIONBIO
1910 #if defined(SYSV_PTYS) || defined(UNIX98_PTYS)
1911 {
1912 int on = 1;
1913 ioctl (fd, FIONBIO, &on);
1914 }
1915 #endif
1916 #endif
1917 #ifdef IBMRTAIX
1918 /* On AIX, the parent gets SIGHUP when a pty attached child dies. So, we */
1919 /* ignore SIGHUP once we've started a child on a pty. Note that this may */
1920 /* cause EMACS not to die when it should, i.e., when its own controlling */
1921 /* tty goes away. I've complained to the AIX developers, and they may */
1922 /* change this behavior, but I'm not going to hold my breath. */
1923 signal (SIGHUP, SIG_IGN);
1924 #endif
1925 }
1926 #endif /* HAVE_PTYS */
1927 \f
1928 #ifdef VMS
1929
1930 /* Assigning an input channel is done at the start of Emacs execution.
1931 This is called each time Emacs is resumed, also, but does nothing
1932 because input_chain is no longer zero. */
1933
1934 void
1935 init_vms_input ()
1936 {
1937 int status;
1938
1939 if (input_fd == 0)
1940 {
1941 status = SYS$ASSIGN (&input_dsc, &input_fd, 0, 0);
1942 if (! (status & 1))
1943 LIB$STOP (status);
1944 }
1945 }
1946
1947 /* Deassigning the input channel is done before exiting. */
1948
1949 void
1950 stop_vms_input ()
1951 {
1952 return SYS$DASSGN (input_fd);
1953 }
1954
1955 short input_buffer;
1956
1957 /* Request reading one character into the keyboard buffer.
1958 This is done as soon as the buffer becomes empty. */
1959
1960 void
1961 queue_kbd_input ()
1962 {
1963 int status;
1964 extern kbd_input_ast ();
1965
1966 waiting_for_ast = 0;
1967 stop_input = 0;
1968 status = SYS$QIO (0, input_fd, IO$_READVBLK,
1969 &input_iosb, kbd_input_ast, 1,
1970 &input_buffer, 1, 0, terminator_mask, 0, 0);
1971 }
1972
1973 int input_count;
1974
1975 /* Ast routine that is called when keyboard input comes in
1976 in accord with the SYS$QIO above. */
1977
1978 void
1979 kbd_input_ast ()
1980 {
1981 register int c = -1;
1982 int old_errno = errno;
1983 extern EMACS_TIME *input_available_clear_time;
1984
1985 if (waiting_for_ast)
1986 SYS$SETEF (input_ef);
1987 waiting_for_ast = 0;
1988 input_count++;
1989 #ifdef ASTDEBUG
1990 if (input_count == 25)
1991 exit (1);
1992 printf ("Ast # %d,", input_count);
1993 printf (" iosb = %x, %x, %x, %x",
1994 input_iosb.offset, input_iosb.status, input_iosb.termlen,
1995 input_iosb.term);
1996 #endif
1997 if (input_iosb.offset)
1998 {
1999 c = input_buffer;
2000 #ifdef ASTDEBUG
2001 printf (", char = 0%o", c);
2002 #endif
2003 }
2004 #ifdef ASTDEBUG
2005 printf ("\n");
2006 fflush (stdout);
2007 sleep (1);
2008 #endif
2009 if (! stop_input)
2010 queue_kbd_input ();
2011 if (c >= 0)
2012 {
2013 struct input_event e;
2014 e.kind = ASCII_KEYSTROKE_EVENT;
2015 XSETINT (e.code, c);
2016 e.frame_or_window = selected_frame;
2017 kbd_buffer_store_event (&e);
2018 }
2019 if (input_available_clear_time)
2020 EMACS_SET_SECS_USECS (*input_available_clear_time, 0, 0);
2021 errno = old_errno;
2022 }
2023
2024 /* Wait until there is something in kbd_buffer. */
2025
2026 void
2027 wait_for_kbd_input ()
2028 {
2029 extern int have_process_input, process_exited;
2030
2031 /* If already something, avoid doing system calls. */
2032 if (detect_input_pending ())
2033 {
2034 return;
2035 }
2036 /* Clear a flag, and tell ast routine above to set it. */
2037 SYS$CLREF (input_ef);
2038 waiting_for_ast = 1;
2039 /* Check for timing error: ast happened while we were doing that. */
2040 if (!detect_input_pending ())
2041 {
2042 /* No timing error: wait for flag to be set. */
2043 set_waiting_for_input (0);
2044 SYS$WFLOR (input_ef, input_eflist);
2045 clear_waiting_for_input ();
2046 if (!detect_input_pending ())
2047 /* Check for subprocess input availability */
2048 {
2049 int dsp = have_process_input || process_exited;
2050
2051 SYS$CLREF (process_ef);
2052 if (have_process_input)
2053 process_command_input ();
2054 if (process_exited)
2055 process_exit ();
2056 if (dsp)
2057 {
2058 update_mode_lines++;
2059 prepare_menu_bars ();
2060 redisplay_preserve_echo_area (18);
2061 }
2062 }
2063 }
2064 waiting_for_ast = 0;
2065 }
2066
2067 /* Get rid of any pending QIO, when we are about to suspend
2068 or when we want to throw away pending input.
2069 We wait for a positive sign that the AST routine has run
2070 and therefore there is no I/O request queued when we return.
2071 SYS$SETAST is used to avoid a timing error. */
2072
2073 void
2074 end_kbd_input ()
2075 {
2076 #ifdef ASTDEBUG
2077 printf ("At end_kbd_input.\n");
2078 fflush (stdout);
2079 sleep (1);
2080 #endif
2081 if (LIB$AST_IN_PROG ()) /* Don't wait if suspending from kbd_buffer_store_event! */
2082 {
2083 SYS$CANCEL (input_fd);
2084 return;
2085 }
2086
2087 SYS$SETAST (0);
2088 /* Clear a flag, and tell ast routine above to set it. */
2089 SYS$CLREF (input_ef);
2090 waiting_for_ast = 1;
2091 stop_input = 1;
2092 SYS$CANCEL (input_fd);
2093 SYS$SETAST (1);
2094 SYS$WAITFR (input_ef);
2095 waiting_for_ast = 0;
2096 }
2097
2098 /* Wait for either input available or time interval expiry. */
2099
2100 void
2101 input_wait_timeout (timeval)
2102 int timeval; /* Time to wait, in seconds */
2103 {
2104 int time [2];
2105 static int zero = 0;
2106 static int large = -10000000;
2107
2108 LIB$EMUL (&timeval, &large, &zero, time); /* Convert to VMS format */
2109
2110 /* If already something, avoid doing system calls. */
2111 if (detect_input_pending ())
2112 {
2113 return;
2114 }
2115 /* Clear a flag, and tell ast routine above to set it. */
2116 SYS$CLREF (input_ef);
2117 waiting_for_ast = 1;
2118 /* Check for timing error: ast happened while we were doing that. */
2119 if (!detect_input_pending ())
2120 {
2121 /* No timing error: wait for flag to be set. */
2122 SYS$CANTIM (1, 0);
2123 if (SYS$SETIMR (timer_ef, time, 0, 1) & 1) /* Set timer */
2124 SYS$WFLOR (timer_ef, timer_eflist); /* Wait for timer expiry or input */
2125 }
2126 waiting_for_ast = 0;
2127 }
2128
2129 /* The standard `sleep' routine works some other way
2130 and it stops working if you have ever quit out of it.
2131 This one continues to work. */
2132
2133 sys_sleep (timeval)
2134 int timeval;
2135 {
2136 int time [2];
2137 static int zero = 0;
2138 static int large = -10000000;
2139
2140 LIB$EMUL (&timeval, &large, &zero, time); /* Convert to VMS format */
2141
2142 SYS$CANTIM (1, 0);
2143 if (SYS$SETIMR (timer_ef, time, 0, 1) & 1) /* Set timer */
2144 SYS$WAITFR (timer_ef); /* Wait for timer expiry only */
2145 }
2146
2147 void
2148 init_sigio (fd)
2149 int fd;
2150 {
2151 request_sigio ();
2152 }
2153
2154 reset_sigio ()
2155 {
2156 unrequest_sigio ();
2157 }
2158
2159 void
2160 request_sigio ()
2161 {
2162 croak ("request sigio");
2163 }
2164
2165 void
2166 unrequest_sigio ()
2167 {
2168 croak ("unrequest sigio");
2169 }
2170
2171 #endif /* VMS */
2172 \f
2173 /* Note that VMS compiler won't accept defined (CANNOT_DUMP). */
2174 #ifndef CANNOT_DUMP
2175 #define NEED_STARTS
2176 #endif
2177
2178 #ifndef SYSTEM_MALLOC
2179 #ifndef NEED_STARTS
2180 #define NEED_STARTS
2181 #endif
2182 #endif
2183
2184 #ifdef NEED_STARTS
2185 /* Some systems that cannot dump also cannot implement these. */
2186
2187 /*
2188 * Return the address of the start of the text segment prior to
2189 * doing an unexec. After unexec the return value is undefined.
2190 * See crt0.c for further explanation and _start.
2191 *
2192 */
2193
2194 #if !(defined (__NetBSD__) && defined (__ELF__))
2195 #ifndef HAVE_TEXT_START
2196 char *
2197 start_of_text ()
2198 {
2199 #ifdef TEXT_START
2200 return ((char *) TEXT_START);
2201 #else
2202 #ifdef GOULD
2203 extern csrt ();
2204 return ((char *) csrt);
2205 #else /* not GOULD */
2206 extern int _start ();
2207 return ((char *) _start);
2208 #endif /* GOULD */
2209 #endif /* TEXT_START */
2210 }
2211 #endif /* not HAVE_TEXT_START */
2212 #endif
2213
2214 /*
2215 * Return the address of the start of the data segment prior to
2216 * doing an unexec. After unexec the return value is undefined.
2217 * See crt0.c for further information and definition of data_start.
2218 *
2219 * Apparently, on BSD systems this is etext at startup. On
2220 * USG systems (swapping) this is highly mmu dependent and
2221 * is also dependent on whether or not the program is running
2222 * with shared text. Generally there is a (possibly large)
2223 * gap between end of text and start of data with shared text.
2224 *
2225 * On Uniplus+ systems with shared text, data starts at a
2226 * fixed address. Each port (from a given oem) is generally
2227 * different, and the specific value of the start of data can
2228 * be obtained via the UniPlus+ specific "uvar" system call,
2229 * however the method outlined in crt0.c seems to be more portable.
2230 *
2231 * Probably what will have to happen when a USG unexec is available,
2232 * at least on UniPlus, is temacs will have to be made unshared so
2233 * that text and data are contiguous. Then once loadup is complete,
2234 * unexec will produce a shared executable where the data can be
2235 * at the normal shared text boundary and the startofdata variable
2236 * will be patched by unexec to the correct value.
2237 *
2238 */
2239
2240 char *
2241 start_of_data ()
2242 {
2243 #ifdef DATA_START
2244 return ((char *) DATA_START);
2245 #else
2246 #ifdef ORDINARY_LINK
2247 /*
2248 * This is a hack. Since we're not linking crt0.c or pre_crt0.c,
2249 * data_start isn't defined. We take the address of environ, which
2250 * is known to live at or near the start of the system crt0.c, and
2251 * we don't sweat the handful of bytes that might lose.
2252 */
2253 extern char **environ;
2254
2255 return ((char *) &environ);
2256 #else
2257 extern int data_start;
2258 return ((char *) &data_start);
2259 #endif /* ORDINARY_LINK */
2260 #endif /* DATA_START */
2261 }
2262 #endif /* NEED_STARTS (not CANNOT_DUMP or not SYSTEM_MALLOC) */
2263
2264 #ifndef CANNOT_DUMP
2265 /* Some systems that cannot dump also cannot implement these. */
2266
2267 /*
2268 * Return the address of the end of the text segment prior to
2269 * doing an unexec. After unexec the return value is undefined.
2270 */
2271
2272 char *
2273 end_of_text ()
2274 {
2275 #ifdef TEXT_END
2276 return ((char *) TEXT_END);
2277 #else
2278 extern int etext;
2279 return ((char *) &etext);
2280 #endif
2281 }
2282
2283 /*
2284 * Return the address of the end of the data segment prior to
2285 * doing an unexec. After unexec the return value is undefined.
2286 */
2287
2288 char *
2289 end_of_data ()
2290 {
2291 #ifdef DATA_END
2292 return ((char *) DATA_END);
2293 #else
2294 extern int edata;
2295 return ((char *) &edata);
2296 #endif
2297 }
2298
2299 #endif /* not CANNOT_DUMP */
2300 \f
2301 /* init_system_name sets up the string for the Lisp function
2302 system-name to return. */
2303
2304 #ifdef BSD4_1
2305 #include <whoami.h>
2306 #endif
2307
2308 extern Lisp_Object Vsystem_name;
2309
2310 #ifndef BSD4_1
2311 #ifndef VMS
2312 #ifdef HAVE_SOCKETS
2313 #include <sys/socket.h>
2314 #include <netdb.h>
2315 #endif /* HAVE_SOCKETS */
2316 #endif /* not VMS */
2317 #endif /* not BSD4_1 */
2318
2319 #ifdef TRY_AGAIN
2320 #ifndef HAVE_H_ERRNO
2321 extern int h_errno;
2322 #endif
2323 #endif /* TRY_AGAIN */
2324
2325 void
2326 init_system_name ()
2327 {
2328 #ifdef BSD4_1
2329 Vsystem_name = build_string (sysname);
2330 #else
2331 #ifdef VMS
2332 char *sp, *end;
2333 if ((sp = egetenv ("SYS$NODE")) == 0)
2334 Vsystem_name = build_string ("vax-vms");
2335 else if ((end = index (sp, ':')) == 0)
2336 Vsystem_name = build_string (sp);
2337 else
2338 Vsystem_name = make_string (sp, end - sp);
2339 #else
2340 #ifndef HAVE_GETHOSTNAME
2341 struct utsname uts;
2342 uname (&uts);
2343 Vsystem_name = build_string (uts.nodename);
2344 #else /* HAVE_GETHOSTNAME */
2345 unsigned int hostname_size = 256;
2346 char *hostname = (char *) alloca (hostname_size);
2347
2348 /* Try to get the host name; if the buffer is too short, try
2349 again. Apparently, the only indication gethostname gives of
2350 whether the buffer was large enough is the presence or absence
2351 of a '\0' in the string. Eech. */
2352 for (;;)
2353 {
2354 gethostname (hostname, hostname_size - 1);
2355 hostname[hostname_size - 1] = '\0';
2356
2357 /* Was the buffer large enough for the '\0'? */
2358 if (strlen (hostname) < hostname_size - 1)
2359 break;
2360
2361 hostname_size <<= 1;
2362 hostname = (char *) alloca (hostname_size);
2363 }
2364 #ifdef HAVE_SOCKETS
2365 /* Turn the hostname into the official, fully-qualified hostname.
2366 Don't do this if we're going to dump; this can confuse system
2367 libraries on some machines and make the dumped emacs core dump. */
2368 #ifndef CANNOT_DUMP
2369 if (initialized)
2370 #endif /* not CANNOT_DUMP */
2371 if (! index (hostname, '.'))
2372 {
2373 struct hostent *hp;
2374 int count;
2375 for (count = 0;; count++)
2376 {
2377 #ifdef TRY_AGAIN
2378 h_errno = 0;
2379 #endif
2380 hp = gethostbyname (hostname);
2381 #ifdef TRY_AGAIN
2382 if (! (hp == 0 && h_errno == TRY_AGAIN))
2383 #endif
2384 break;
2385 if (count >= 5)
2386 break;
2387 Fsleep_for (make_number (1), Qnil);
2388 }
2389 if (hp)
2390 {
2391 char *fqdn = (char *) hp->h_name;
2392 #if 0
2393 char *p;
2394 #endif
2395
2396 if (!index (fqdn, '.'))
2397 {
2398 /* We still don't have a fully qualified domain name.
2399 Try to find one in the list of alternate names */
2400 char **alias = hp->h_aliases;
2401 while (*alias && !index (*alias, '.'))
2402 alias++;
2403 if (*alias)
2404 fqdn = *alias;
2405 }
2406 hostname = fqdn;
2407 #if 0
2408 /* Convert the host name to lower case. */
2409 /* Using ctype.h here would introduce a possible locale
2410 dependence that is probably wrong for hostnames. */
2411 p = hostname;
2412 while (*p)
2413 {
2414 if (*p >= 'A' && *p <= 'Z')
2415 *p += 'a' - 'A';
2416 p++;
2417 }
2418 #endif
2419 }
2420 }
2421 #endif /* HAVE_SOCKETS */
2422 /* We used to try using getdomainname here,
2423 but NIIBE Yutaka <gniibe@etl.go.jp> says that
2424 getdomainname gets the NIS/YP domain which often is not the same
2425 as in Internet domain name. */
2426 #if 0 /* Turned off because sysinfo is not really likely to return the
2427 correct Internet domain. */
2428 #if (HAVE_SYSINFO && defined (SI_SRPC_DOMAIN))
2429 if (! index (hostname, '.'))
2430 {
2431 /* The hostname is not fully qualified. Append the domain name. */
2432
2433 int hostlen = strlen (hostname);
2434 int domain_size = 256;
2435
2436 for (;;)
2437 {
2438 char *domain = (char *) alloca (domain_size + 1);
2439 char *fqdn = (char *) alloca (hostlen + 1 + domain_size + 1);
2440 int sys_domain_size = sysinfo (SI_SRPC_DOMAIN, domain, domain_size);
2441 if (sys_domain_size <= 0)
2442 break;
2443 if (domain_size < sys_domain_size)
2444 {
2445 domain_size = sys_domain_size;
2446 continue;
2447 }
2448 strcpy (fqdn, hostname);
2449 if (domain[0] == '.')
2450 strcpy (fqdn + hostlen, domain);
2451 else if (domain[0] != 0)
2452 {
2453 fqdn[hostlen] = '.';
2454 strcpy (fqdn + hostlen + 1, domain);
2455 }
2456 hostname = fqdn;
2457 break;
2458 }
2459 }
2460 #endif /* HAVE_SYSINFO && defined (SI_SRPC_DOMAIN) */
2461 #endif /* 0 */
2462 Vsystem_name = build_string (hostname);
2463 #endif /* HAVE_GETHOSTNAME */
2464 #endif /* VMS */
2465 #endif /* BSD4_1 */
2466 {
2467 unsigned char *p;
2468 for (p = XSTRING (Vsystem_name)->data; *p; p++)
2469 if (*p == ' ' || *p == '\t')
2470 *p = '-';
2471 }
2472 }
2473 \f
2474 #ifndef MSDOS
2475 #ifndef VMS
2476 #if !defined (HAVE_SELECT) || defined (BROKEN_SELECT_NON_X)
2477
2478 #include "sysselect.h"
2479 #undef select
2480
2481 #if defined (HAVE_X_WINDOWS) && !defined (HAVE_SELECT)
2482 /* Cause explanatory error message at compile time,
2483 since the select emulation is not good enough for X. */
2484 int *x = &x_windows_lose_if_no_select_system_call;
2485 #endif
2486
2487 /* Emulate as much as select as is possible under 4.1 and needed by Gnu Emacs
2488 * Only checks read descriptors.
2489 */
2490 /* How long to wait between checking fds in select */
2491 #define SELECT_PAUSE 1
2492 int select_alarmed;
2493
2494 /* For longjmp'ing back to read_input_waiting. */
2495
2496 jmp_buf read_alarm_throw;
2497
2498 /* Nonzero if the alarm signal should throw back to read_input_waiting.
2499 The read_socket_hook function sets this to 1 while it is waiting. */
2500
2501 int read_alarm_should_throw;
2502
2503 SIGTYPE
2504 select_alarm ()
2505 {
2506 select_alarmed = 1;
2507 #ifdef BSD4_1
2508 sigrelse (SIGALRM);
2509 #else /* not BSD4_1 */
2510 signal (SIGALRM, SIG_IGN);
2511 #endif /* not BSD4_1 */
2512 if (read_alarm_should_throw)
2513 longjmp (read_alarm_throw, 1);
2514 }
2515
2516 #ifndef WINDOWSNT
2517 /* Only rfds are checked. */
2518 int
2519 sys_select (nfds, rfds, wfds, efds, timeout)
2520 int nfds;
2521 SELECT_TYPE *rfds, *wfds, *efds;
2522 EMACS_TIME *timeout;
2523 {
2524 int ravail = 0;
2525 SELECT_TYPE orfds;
2526 int timeoutval;
2527 int *local_timeout;
2528 extern int proc_buffered_char[];
2529 #ifndef subprocesses
2530 int process_tick = 0, update_tick = 0;
2531 #else
2532 extern int process_tick, update_tick;
2533 #endif
2534 unsigned char buf;
2535
2536 #if defined (HAVE_SELECT) && defined (HAVE_X_WINDOWS)
2537 /* If we're using X, then the native select will work; we only need the
2538 emulation for non-X usage. */
2539 if (!NILP (Vwindow_system))
2540 return select (nfds, rfds, wfds, efds, timeout);
2541 #endif
2542 timeoutval = timeout ? EMACS_SECS (*timeout) : 100000;
2543 local_timeout = &timeoutval;
2544 FD_ZERO (&orfds);
2545 if (rfds)
2546 {
2547 orfds = *rfds;
2548 FD_ZERO (rfds);
2549 }
2550 if (wfds)
2551 FD_ZERO (wfds);
2552 if (efds)
2553 FD_ZERO (efds);
2554
2555 /* If we are looking only for the terminal, with no timeout,
2556 just read it and wait -- that's more efficient. */
2557 if (*local_timeout == 100000 && process_tick == update_tick
2558 && FD_ISSET (0, &orfds))
2559 {
2560 int fd;
2561 for (fd = 1; fd < nfds; ++fd)
2562 if (FD_ISSET (fd, &orfds))
2563 goto hardway;
2564 if (! detect_input_pending ())
2565 read_input_waiting ();
2566 FD_SET (0, rfds);
2567 return 1;
2568 }
2569
2570 hardway:
2571 /* Once a second, till the timer expires, check all the flagged read
2572 * descriptors to see if any input is available. If there is some then
2573 * set the corresponding bit in the return copy of rfds.
2574 */
2575 while (1)
2576 {
2577 register int to_check, fd;
2578
2579 if (rfds)
2580 {
2581 for (to_check = nfds, fd = 0; --to_check >= 0; fd++)
2582 {
2583 if (FD_ISSET (fd, &orfds))
2584 {
2585 int avail = 0, status = 0;
2586
2587 if (fd == 0)
2588 avail = detect_input_pending (); /* Special keyboard handler */
2589 else
2590 {
2591 #ifdef FIONREAD
2592 status = ioctl (fd, FIONREAD, &avail);
2593 #else /* no FIONREAD */
2594 /* Hoping it will return -1 if nothing available
2595 or 0 if all 0 chars requested are read. */
2596 if (proc_buffered_char[fd] >= 0)
2597 avail = 1;
2598 else
2599 {
2600 avail = read (fd, &buf, 1);
2601 if (avail > 0)
2602 proc_buffered_char[fd] = buf;
2603 }
2604 #endif /* no FIONREAD */
2605 }
2606 if (status >= 0 && avail > 0)
2607 {
2608 FD_SET (fd, rfds);
2609 ravail++;
2610 }
2611 }
2612 }
2613 }
2614 if (*local_timeout == 0 || ravail != 0 || process_tick != update_tick)
2615 break;
2616
2617 turn_on_atimers (0);
2618 signal (SIGALRM, select_alarm);
2619 select_alarmed = 0;
2620 alarm (SELECT_PAUSE);
2621
2622 /* Wait for a SIGALRM (or maybe a SIGTINT) */
2623 while (select_alarmed == 0 && *local_timeout != 0
2624 && process_tick == update_tick)
2625 {
2626 /* If we are interested in terminal input,
2627 wait by reading the terminal.
2628 That makes instant wakeup for terminal input at least. */
2629 if (FD_ISSET (0, &orfds))
2630 {
2631 read_input_waiting ();
2632 if (detect_input_pending ())
2633 select_alarmed = 1;
2634 }
2635 else
2636 pause ();
2637 }
2638 (*local_timeout) -= SELECT_PAUSE;
2639
2640 /* Reset the old alarm if there was one. */
2641 turn_on_atimers (1);
2642
2643 if (*local_timeout == 0) /* Stop on timer being cleared */
2644 break;
2645 }
2646 return ravail;
2647 }
2648 #endif /* not WINDOWSNT */
2649
2650 /* Read keyboard input into the standard buffer,
2651 waiting for at least one character. */
2652
2653 /* Make all keyboard buffers much bigger when using a window system. */
2654 #ifdef HAVE_WINDOW_SYSTEM
2655 #define BUFFER_SIZE_FACTOR 16
2656 #else
2657 #define BUFFER_SIZE_FACTOR 1
2658 #endif
2659
2660 void
2661 read_input_waiting ()
2662 {
2663 struct input_event e;
2664 int nread, i;
2665 extern int quit_char;
2666
2667 if (read_socket_hook)
2668 {
2669 struct input_event buf[256];
2670
2671 read_alarm_should_throw = 0;
2672 if (! setjmp (read_alarm_throw))
2673 nread = (*read_socket_hook) (0, buf, 256, 1);
2674 else
2675 nread = -1;
2676
2677 /* Scan the chars for C-g and store them in kbd_buffer. */
2678 for (i = 0; i < nread; i++)
2679 {
2680 kbd_buffer_store_event (&buf[i]);
2681 /* Don't look at input that follows a C-g too closely.
2682 This reduces lossage due to autorepeat on C-g. */
2683 if (buf[i].kind == ASCII_KEYSTROKE_EVENT
2684 && buf[i].code == quit_char)
2685 break;
2686 }
2687 }
2688 else
2689 {
2690 char buf[3];
2691 nread = read (fileno (stdin), buf, 1);
2692
2693 /* Scan the chars for C-g and store them in kbd_buffer. */
2694 e.kind = ASCII_KEYSTROKE_EVENT;
2695 e.frame_or_window = selected_frame;
2696 e.modifiers = 0;
2697 for (i = 0; i < nread; i++)
2698 {
2699 /* Convert chars > 0177 to meta events if desired.
2700 We do this under the same conditions that read_avail_input does. */
2701 if (read_socket_hook == 0)
2702 {
2703 /* If the user says she has a meta key, then believe her. */
2704 if (meta_key == 1 && (buf[i] & 0x80))
2705 e.modifiers = meta_modifier;
2706 if (meta_key != 2)
2707 buf[i] &= ~0x80;
2708 }
2709
2710 XSETINT (e.code, buf[i]);
2711 kbd_buffer_store_event (&e);
2712 /* Don't look at input that follows a C-g too closely.
2713 This reduces lossage due to autorepeat on C-g. */
2714 if (buf[i] == quit_char)
2715 break;
2716 }
2717 }
2718 }
2719
2720 #endif /* not HAVE_SELECT */
2721 #endif /* not VMS */
2722 #endif /* not MSDOS */
2723 \f
2724 #ifdef BSD4_1
2725 void
2726 init_sigio (fd)
2727 int fd;
2728 {
2729 if (noninteractive)
2730 return;
2731 lmode = LINTRUP | lmode;
2732 ioctl (fd, TIOCLSET, &lmode);
2733 }
2734
2735 void
2736 reset_sigio ()
2737 {
2738 if (noninteractive)
2739 return;
2740 lmode = ~LINTRUP & lmode;
2741 ioctl (0, TIOCLSET, &lmode);
2742 }
2743
2744 void
2745 request_sigio ()
2746 {
2747 sigrelse (SIGTINT);
2748
2749 interrupts_deferred = 0;
2750 }
2751
2752 void
2753 unrequest_sigio ()
2754 {
2755 sighold (SIGTINT);
2756
2757 interrupts_deferred = 1;
2758 }
2759
2760 /* still inside #ifdef BSD4_1 */
2761 #ifdef subprocesses
2762
2763 int sigheld; /* Mask of held signals */
2764
2765 void
2766 sigholdx (signum)
2767 int signum;
2768 {
2769 sigheld |= sigbit (signum);
2770 sighold (signum);
2771 }
2772
2773 void
2774 sigisheld (signum)
2775 int signum;
2776 {
2777 sigheld |= sigbit (signum);
2778 }
2779
2780 void
2781 sigunhold (signum)
2782 int signum;
2783 {
2784 sigheld &= ~sigbit (signum);
2785 sigrelse (signum);
2786 }
2787
2788 void
2789 sigfree () /* Free all held signals */
2790 {
2791 int i;
2792 for (i = 0; i < NSIG; i++)
2793 if (sigheld & sigbit (i))
2794 sigrelse (i);
2795 sigheld = 0;
2796 }
2797
2798 int
2799 sigbit (i)
2800 {
2801 return 1 << (i - 1);
2802 }
2803 #endif /* subprocesses */
2804 #endif /* BSD4_1 */
2805 \f
2806 /* POSIX signals support - DJB */
2807 /* Anyone with POSIX signals should have ANSI C declarations */
2808
2809 #ifdef POSIX_SIGNALS
2810
2811 sigset_t empty_mask, full_mask;
2812
2813 signal_handler_t
2814 sys_signal (int signal_number, signal_handler_t action)
2815 {
2816 struct sigaction new_action, old_action;
2817 sigemptyset (&new_action.sa_mask);
2818 new_action.sa_handler = action;
2819 #if defined (SA_RESTART) && ! defined (BROKEN_SA_RESTART)
2820 /* Emacs mostly works better with restartable system services. If this
2821 flag exists, we probably want to turn it on here.
2822 However, on some systems this resets the timeout of `select'
2823 which means that `select' never finishes if it keeps getting signals.
2824 BROKEN_SA_RESTART is defined on those systems. */
2825 new_action.sa_flags = SA_RESTART;
2826 #else
2827 new_action.sa_flags = 0;
2828 #endif
2829 sigaction (signal_number, &new_action, &old_action);
2830 return (old_action.sa_handler);
2831 }
2832
2833 #ifndef __GNUC__
2834 /* If we're compiling with GCC, we don't need this function, since it
2835 can be written as a macro. */
2836 sigset_t
2837 sys_sigmask (int sig)
2838 {
2839 sigset_t mask;
2840 sigemptyset (&mask);
2841 sigaddset (&mask, sig);
2842 return mask;
2843 }
2844 #endif
2845
2846 /* I'd like to have these guys return pointers to the mask storage in here,
2847 but there'd be trouble if the code was saving multiple masks. I'll be
2848 safe and pass the structure. It normally won't be more than 2 bytes
2849 anyhow. - DJB */
2850
2851 sigset_t
2852 sys_sigblock (sigset_t new_mask)
2853 {
2854 sigset_t old_mask;
2855 sigprocmask (SIG_BLOCK, &new_mask, &old_mask);
2856 return (old_mask);
2857 }
2858
2859 sigset_t
2860 sys_sigunblock (sigset_t new_mask)
2861 {
2862 sigset_t old_mask;
2863 sigprocmask (SIG_UNBLOCK, &new_mask, &old_mask);
2864 return (old_mask);
2865 }
2866
2867 sigset_t
2868 sys_sigsetmask (sigset_t new_mask)
2869 {
2870 sigset_t old_mask;
2871 sigprocmask (SIG_SETMASK, &new_mask, &old_mask);
2872 return (old_mask);
2873 }
2874
2875 #endif /* POSIX_SIGNALS */
2876 \f
2877 #if !defined HAVE_STRSIGNAL && !defined SYS_SIGLIST_DECLARED
2878 static char *my_sys_siglist[NSIG];
2879 # ifdef sys_siglist
2880 # undef sys_siglist
2881 # endif
2882 # define sys_siglist my_sys_siglist
2883 #endif
2884
2885 void
2886 init_signals ()
2887 {
2888 #ifdef POSIX_SIGNALS
2889 sigemptyset (&empty_mask);
2890 sigfillset (&full_mask);
2891 #endif
2892
2893 #if !defined HAVE_STRSIGNAL && !defined SYS_SIGLIST_DECLARED
2894 if (! initialized)
2895 {
2896 # ifdef SIGABRT
2897 sys_siglist[SIGABRT] = "Aborted";
2898 # endif
2899 # ifdef SIGAIO
2900 sys_siglist[SIGAIO] = "LAN I/O interrupt";
2901 # endif
2902 # ifdef SIGALRM
2903 sys_siglist[SIGALRM] = "Alarm clock";
2904 # endif
2905 # ifdef SIGBUS
2906 sys_siglist[SIGBUS] = "Bus error";
2907 # endif
2908 # ifdef SIGCLD
2909 sys_siglist[SIGCLD] = "Child status changed";
2910 # endif
2911 # ifdef SIGCHLD
2912 sys_siglist[SIGCHLD] = "Child status changed";
2913 # endif
2914 # ifdef SIGCONT
2915 sys_siglist[SIGCONT] = "Continued";
2916 # endif
2917 # ifdef SIGDANGER
2918 sys_siglist[SIGDANGER] = "Swap space dangerously low";
2919 # endif
2920 # ifdef SIGDGNOTIFY
2921 sys_siglist[SIGDGNOTIFY] = "Notification message in queue";
2922 # endif
2923 # ifdef SIGEMT
2924 sys_siglist[SIGEMT] = "Emulation trap";
2925 # endif
2926 # ifdef SIGFPE
2927 sys_siglist[SIGFPE] = "Arithmetic exception";
2928 # endif
2929 # ifdef SIGFREEZE
2930 sys_siglist[SIGFREEZE] = "SIGFREEZE";
2931 # endif
2932 # ifdef SIGGRANT
2933 sys_siglist[SIGGRANT] = "Monitor mode granted";
2934 # endif
2935 # ifdef SIGHUP
2936 sys_siglist[SIGHUP] = "Hangup";
2937 # endif
2938 # ifdef SIGILL
2939 sys_siglist[SIGILL] = "Illegal instruction";
2940 # endif
2941 # ifdef SIGINT
2942 sys_siglist[SIGINT] = "Interrupt";
2943 # endif
2944 # ifdef SIGIO
2945 sys_siglist[SIGIO] = "I/O possible";
2946 # endif
2947 # ifdef SIGIOINT
2948 sys_siglist[SIGIOINT] = "I/O intervention required";
2949 # endif
2950 # ifdef SIGIOT
2951 sys_siglist[SIGIOT] = "IOT trap";
2952 # endif
2953 # ifdef SIGKILL
2954 sys_siglist[SIGKILL] = "Killed";
2955 # endif
2956 # ifdef SIGLOST
2957 sys_siglist[SIGLOST] = "Resource lost";
2958 # endif
2959 # ifdef SIGLWP
2960 sys_siglist[SIGLWP] = "SIGLWP";
2961 # endif
2962 # ifdef SIGMSG
2963 sys_siglist[SIGMSG] = "Monitor mode data available";
2964 # endif
2965 # ifdef SIGPHONE
2966 sys_siglist[SIGWIND] = "SIGPHONE";
2967 # endif
2968 # ifdef SIGPIPE
2969 sys_siglist[SIGPIPE] = "Broken pipe";
2970 # endif
2971 # ifdef SIGPOLL
2972 sys_siglist[SIGPOLL] = "Pollable event occurred";
2973 # endif
2974 # ifdef SIGPROF
2975 sys_siglist[SIGPROF] = "Profiling timer expired";
2976 # endif
2977 # ifdef SIGPTY
2978 sys_siglist[SIGPTY] = "PTY I/O interrupt";
2979 # endif
2980 # ifdef SIGPWR
2981 sys_siglist[SIGPWR] = "Power-fail restart";
2982 # endif
2983 # ifdef SIGQUIT
2984 sys_siglist[SIGQUIT] = "Quit";
2985 # endif
2986 # ifdef SIGRETRACT
2987 sys_siglist[SIGRETRACT] = "Need to relinguish monitor mode";
2988 # endif
2989 # ifdef SIGSAK
2990 sys_siglist[SIGSAK] = "Secure attention";
2991 # endif
2992 # ifdef SIGSEGV
2993 sys_siglist[SIGSEGV] = "Segmentation violation";
2994 # endif
2995 # ifdef SIGSOUND
2996 sys_siglist[SIGSOUND] = "Sound completed";
2997 # endif
2998 # ifdef SIGSTOP
2999 sys_siglist[SIGSTOP] = "Stopped (signal)";
3000 # endif
3001 # ifdef SIGSTP
3002 sys_siglist[SIGSTP] = "Stopped (user)";
3003 # endif
3004 # ifdef SIGSYS
3005 sys_siglist[SIGSYS] = "Bad argument to system call";
3006 # endif
3007 # ifdef SIGTERM
3008 sys_siglist[SIGTERM] = "Terminated";
3009 # endif
3010 # ifdef SIGTHAW
3011 sys_siglist[SIGTHAW] = "SIGTHAW";
3012 # endif
3013 # ifdef SIGTRAP
3014 sys_siglist[SIGTRAP] = "Trace/breakpoint trap";
3015 # endif
3016 # ifdef SIGTSTP
3017 sys_siglist[SIGTSTP] = "Stopped (user)";
3018 # endif
3019 # ifdef SIGTTIN
3020 sys_siglist[SIGTTIN] = "Stopped (tty input)";
3021 # endif
3022 # ifdef SIGTTOU
3023 sys_siglist[SIGTTOU] = "Stopped (tty output)";
3024 # endif
3025 # ifdef SIGURG
3026 sys_siglist[SIGURG] = "Urgent I/O condition";
3027 # endif
3028 # ifdef SIGUSR1
3029 sys_siglist[SIGUSR1] = "User defined signal 1";
3030 # endif
3031 # ifdef SIGUSR2
3032 sys_siglist[SIGUSR2] = "User defined signal 2";
3033 # endif
3034 # ifdef SIGVTALRM
3035 sys_siglist[SIGVTALRM] = "Virtual timer expired";
3036 # endif
3037 # ifdef SIGWAITING
3038 sys_siglist[SIGWAITING] = "Process's LWPs are blocked";
3039 # endif
3040 # ifdef SIGWINCH
3041 sys_siglist[SIGWINCH] = "Window size changed";
3042 # endif
3043 # ifdef SIGWIND
3044 sys_siglist[SIGWIND] = "SIGWIND";
3045 # endif
3046 # ifdef SIGXCPU
3047 sys_siglist[SIGXCPU] = "CPU time limit exceeded";
3048 # endif
3049 # ifdef SIGXFSZ
3050 sys_siglist[SIGXFSZ] = "File size limit exceeded";
3051 # endif
3052 }
3053 #endif /* !defined HAVE_STRSIGNAL && !defined SYS_SIGLIST_DECLARED */
3054 }
3055 \f
3056 #ifndef HAVE_RANDOM
3057 #ifdef random
3058 #define HAVE_RANDOM
3059 #endif
3060 #endif
3061
3062 /* Figure out how many bits the system's random number generator uses.
3063 `random' and `lrand48' are assumed to return 31 usable bits.
3064 BSD `rand' returns a 31 bit value but the low order bits are unusable;
3065 so we'll shift it and treat it like the 15-bit USG `rand'. */
3066
3067 #ifndef RAND_BITS
3068 # ifdef HAVE_RANDOM
3069 # define RAND_BITS 31
3070 # else /* !HAVE_RANDOM */
3071 # ifdef HAVE_LRAND48
3072 # define RAND_BITS 31
3073 # define random lrand48
3074 # else /* !HAVE_LRAND48 */
3075 # define RAND_BITS 15
3076 # if RAND_MAX == 32767
3077 # define random rand
3078 # else /* RAND_MAX != 32767 */
3079 # if RAND_MAX == 2147483647
3080 # define random() (rand () >> 16)
3081 # else /* RAND_MAX != 2147483647 */
3082 # ifdef USG
3083 # define random rand
3084 # else
3085 # define random() (rand () >> 16)
3086 # endif /* !USG */
3087 # endif /* RAND_MAX != 2147483647 */
3088 # endif /* RAND_MAX != 32767 */
3089 # endif /* !HAVE_LRAND48 */
3090 # endif /* !HAVE_RANDOM */
3091 #endif /* !RAND_BITS */
3092
3093 void
3094 seed_random (arg)
3095 long arg;
3096 {
3097 #ifdef HAVE_RANDOM
3098 srandom ((unsigned int)arg);
3099 #else
3100 # ifdef HAVE_LRAND48
3101 srand48 (arg);
3102 # else
3103 srand ((unsigned int)arg);
3104 # endif
3105 #endif
3106 }
3107
3108 /*
3109 * Build a full Emacs-sized word out of whatever we've got.
3110 * This suffices even for a 64-bit architecture with a 15-bit rand.
3111 */
3112 long
3113 get_random ()
3114 {
3115 long val = random ();
3116 #if VALBITS > RAND_BITS
3117 val = (val << RAND_BITS) ^ random ();
3118 #if VALBITS > 2*RAND_BITS
3119 val = (val << RAND_BITS) ^ random ();
3120 #if VALBITS > 3*RAND_BITS
3121 val = (val << RAND_BITS) ^ random ();
3122 #if VALBITS > 4*RAND_BITS
3123 val = (val << RAND_BITS) ^ random ();
3124 #endif /* need at least 5 */
3125 #endif /* need at least 4 */
3126 #endif /* need at least 3 */
3127 #endif /* need at least 2 */
3128 return val & ((1L << VALBITS) - 1);
3129 }
3130 \f
3131 #ifdef WRONG_NAME_INSQUE
3132
3133 insque (q,p)
3134 caddr_t q,p;
3135 {
3136 _insque (q,p);
3137 }
3138
3139 #endif
3140 \f
3141 #ifdef VMS
3142
3143 #ifdef getenv
3144 /* If any place else asks for the TERM variable,
3145 allow it to be overridden with the EMACS_TERM variable
3146 before attempting to translate the logical name TERM. As a last
3147 resort, ask for VAX C's special idea of the TERM variable. */
3148 #undef getenv
3149 char *
3150 sys_getenv (name)
3151 char *name;
3152 {
3153 register char *val;
3154 static char buf[256];
3155 static struct dsc$descriptor_s equiv
3156 = {sizeof (buf), DSC$K_DTYPE_T, DSC$K_CLASS_S, buf};
3157 static struct dsc$descriptor_s d_name
3158 = {0, DSC$K_DTYPE_T, DSC$K_CLASS_S, 0};
3159 short eqlen;
3160
3161 if (!strcmp (name, "TERM"))
3162 {
3163 val = (char *) getenv ("EMACS_TERM");
3164 if (val)
3165 return val;
3166 }
3167
3168 d_name.dsc$w_length = strlen (name);
3169 d_name.dsc$a_pointer = name;
3170 if (LIB$SYS_TRNLOG (&d_name, &eqlen, &equiv) == 1)
3171 {
3172 char *str = (char *) xmalloc (eqlen + 1);
3173 bcopy (buf, str, eqlen);
3174 str[eqlen] = '\0';
3175 /* This is a storage leak, but a pain to fix. With luck,
3176 no one will ever notice. */
3177 return str;
3178 }
3179 return (char *) getenv (name);
3180 }
3181 #endif /* getenv */
3182
3183 #ifdef abort
3184 /* Since VMS doesn't believe in core dumps, the only way to debug this beast is
3185 to force a call on the debugger from within the image. */
3186 #undef abort
3187 sys_abort ()
3188 {
3189 reset_sys_modes ();
3190 LIB$SIGNAL (SS$_DEBUG);
3191 }
3192 #endif /* abort */
3193 #endif /* VMS */
3194 \f
3195 #ifdef VMS
3196 #ifdef LINK_CRTL_SHARE
3197 #ifdef SHARABLE_LIB_BUG
3198 /* Variables declared noshare and initialized in sharable libraries
3199 cannot be shared. The VMS linker incorrectly forces you to use a private
3200 version which is uninitialized... If not for this "feature", we
3201 could use the C library definition of sys_nerr and sys_errlist. */
3202 int sys_nerr = 35;
3203 char *sys_errlist[] =
3204 {
3205 "error 0",
3206 "not owner",
3207 "no such file or directory",
3208 "no such process",
3209 "interrupted system call",
3210 "i/o error",
3211 "no such device or address",
3212 "argument list too long",
3213 "exec format error",
3214 "bad file number",
3215 "no child process",
3216 "no more processes",
3217 "not enough memory",
3218 "permission denied",
3219 "bad address",
3220 "block device required",
3221 "mount devices busy",
3222 "file exists",
3223 "cross-device link",
3224 "no such device",
3225 "not a directory",
3226 "is a directory",
3227 "invalid argument",
3228 "file table overflow",
3229 "too many open files",
3230 "not a typewriter",
3231 "text file busy",
3232 "file too big",
3233 "no space left on device",
3234 "illegal seek",
3235 "read-only file system",
3236 "too many links",
3237 "broken pipe",
3238 "math argument",
3239 "result too large",
3240 "I/O stream empty",
3241 "vax/vms specific error code nontranslatable error"
3242 };
3243 #endif /* SHARABLE_LIB_BUG */
3244 #endif /* LINK_CRTL_SHARE */
3245 #endif /* VMS */
3246
3247 #ifndef HAVE_STRERROR
3248 #ifndef WINDOWSNT
3249 char *
3250 strerror (errnum)
3251 int errnum;
3252 {
3253 extern char *sys_errlist[];
3254 extern int sys_nerr;
3255
3256 if (errnum >= 0 && errnum < sys_nerr)
3257 return sys_errlist[errnum];
3258 return (char *) "Unknown error";
3259 }
3260 #endif /* not WINDOWSNT */
3261 #endif /* ! HAVE_STRERROR */
3262 \f
3263 int
3264 emacs_open (path, oflag, mode)
3265 char *path;
3266 int oflag, mode;
3267 {
3268 register int rtnval;
3269
3270 #ifdef BSD4_1
3271 if (oflag & O_CREAT)
3272 return creat (path, mode);
3273 #endif
3274
3275 while ((rtnval = open (path, oflag, mode)) == -1
3276 && (errno == EINTR));
3277 return (rtnval);
3278 }
3279
3280 int
3281 emacs_close (fd)
3282 int fd;
3283 {
3284 int did_retry = 0;
3285 register int rtnval;
3286
3287 while ((rtnval = close (fd)) == -1
3288 && (errno == EINTR))
3289 did_retry = 1;
3290
3291 /* If close is interrupted SunOS 4.1 may or may not have closed the
3292 file descriptor. If it did the second close will fail with
3293 errno = EBADF. That means we have succeeded. */
3294 if (rtnval == -1 && did_retry && errno == EBADF)
3295 return 0;
3296
3297 return rtnval;
3298 }
3299
3300 int
3301 emacs_read (fildes, buf, nbyte)
3302 int fildes;
3303 char *buf;
3304 unsigned int nbyte;
3305 {
3306 register int rtnval;
3307
3308 while ((rtnval = read (fildes, buf, nbyte)) == -1
3309 && (errno == EINTR));
3310 return (rtnval);
3311 }
3312
3313 int
3314 emacs_write (fildes, buf, nbyte)
3315 int fildes;
3316 char *buf;
3317 unsigned int nbyte;
3318 {
3319 register int rtnval, bytes_written;
3320
3321 bytes_written = 0;
3322
3323 while (nbyte > 0)
3324 {
3325 rtnval = write (fildes, buf, nbyte);
3326
3327 if (rtnval == -1)
3328 {
3329 if (errno == EINTR)
3330 continue;
3331 else
3332 return (bytes_written ? bytes_written : -1);
3333 }
3334
3335 buf += rtnval;
3336 nbyte -= rtnval;
3337 bytes_written += rtnval;
3338 }
3339 return (bytes_written);
3340 }
3341 \f
3342 #ifdef USG
3343 /*
3344 * All of the following are for USG.
3345 *
3346 * On USG systems the system calls are INTERRUPTIBLE by signals
3347 * that the user program has elected to catch. Thus the system call
3348 * must be retried in these cases. To handle this without massive
3349 * changes in the source code, we remap the standard system call names
3350 * to names for our own functions in sysdep.c that do the system call
3351 * with retries. Actually, for portability reasons, it is good
3352 * programming practice, as this example shows, to limit all actual
3353 * system calls to a single occurrence in the source. Sure, this
3354 * adds an extra level of function call overhead but it is almost
3355 * always negligible. Fred Fish, Unisoft Systems Inc.
3356 */
3357
3358 /*
3359 * Warning, this function may not duplicate 4.2 action properly
3360 * under error conditions.
3361 */
3362
3363 #ifndef MAXPATHLEN
3364 /* In 4.1, param.h fails to define this. */
3365 #define MAXPATHLEN 1024
3366 #endif
3367
3368 #ifndef HAVE_GETWD
3369
3370 char *
3371 getwd (pathname)
3372 char *pathname;
3373 {
3374 char *npath, *spath;
3375 extern char *getcwd ();
3376
3377 BLOCK_INPUT; /* getcwd uses malloc */
3378 spath = npath = getcwd ((char *) 0, MAXPATHLEN);
3379 if (spath == 0)
3380 {
3381 UNBLOCK_INPUT;
3382 return spath;
3383 }
3384 /* On Altos 3068, getcwd can return @hostname/dir, so discard
3385 up to first slash. Should be harmless on other systems. */
3386 while (*npath && *npath != '/')
3387 npath++;
3388 strcpy (pathname, npath);
3389 free (spath); /* getcwd uses malloc */
3390 UNBLOCK_INPUT;
3391 return pathname;
3392 }
3393
3394 #endif /* HAVE_GETWD */
3395
3396 /*
3397 * Emulate rename using unlink/link. Note that this is
3398 * only partially correct. Also, doesn't enforce restriction
3399 * that files be of same type (regular->regular, dir->dir, etc).
3400 */
3401
3402 #ifndef HAVE_RENAME
3403
3404 rename (from, to)
3405 const char *from;
3406 const char *to;
3407 {
3408 if (access (from, 0) == 0)
3409 {
3410 unlink (to);
3411 if (link (from, to) == 0)
3412 if (unlink (from) == 0)
3413 return (0);
3414 }
3415 return (-1);
3416 }
3417
3418 #endif
3419
3420
3421 #ifdef HPUX
3422 #ifndef HAVE_PERROR
3423
3424 /* HPUX curses library references perror, but as far as we know
3425 it won't be called. Anyway this definition will do for now. */
3426
3427 perror ()
3428 {
3429 }
3430
3431 #endif /* not HAVE_PERROR */
3432 #endif /* HPUX */
3433
3434 #ifndef HAVE_DUP2
3435
3436 /*
3437 * Emulate BSD dup2. First close newd if it already exists.
3438 * Then, attempt to dup oldd. If not successful, call dup2 recursively
3439 * until we are, then close the unsuccessful ones.
3440 */
3441
3442 dup2 (oldd, newd)
3443 int oldd;
3444 int newd;
3445 {
3446 register int fd, ret;
3447
3448 emacs_close (newd);
3449
3450 #ifdef F_DUPFD
3451 return fcntl (oldd, F_DUPFD, newd);
3452 #else
3453 fd = dup (old);
3454 if (fd == -1)
3455 return -1;
3456 if (fd == new)
3457 return new;
3458 ret = dup2 (old,new);
3459 emacs_close (fd);
3460 return ret;
3461 #endif
3462 }
3463
3464 #endif /* not HAVE_DUP2 */
3465
3466 /*
3467 * Gettimeofday. Simulate as much as possible. Only accurate
3468 * to nearest second. Emacs doesn't use tzp so ignore it for now.
3469 * Only needed when subprocesses are defined.
3470 */
3471
3472 #ifdef subprocesses
3473 #ifndef VMS
3474 #ifndef HAVE_GETTIMEOFDAY
3475 #ifdef HAVE_TIMEVAL
3476
3477 /* ARGSUSED */
3478 int
3479 gettimeofday (tp, tzp)
3480 struct timeval *tp;
3481 struct timezone *tzp;
3482 {
3483 extern long time ();
3484
3485 tp->tv_sec = time ((long *)0);
3486 tp->tv_usec = 0;
3487 if (tzp != 0)
3488 tzp->tz_minuteswest = -1;
3489 return 0;
3490 }
3491
3492 #endif
3493 #endif
3494 #endif
3495 #endif /* subprocess && !HAVE_GETTIMEOFDAY && HAVE_TIMEVAL && !VMS */
3496
3497 /*
3498 * This function will go away as soon as all the stubs fixed. (fnf)
3499 */
3500
3501 void
3502 croak (badfunc)
3503 char *badfunc;
3504 {
3505 printf ("%s not yet implemented\r\n", badfunc);
3506 reset_sys_modes ();
3507 exit (1);
3508 }
3509
3510 #endif /* USG */
3511 \f
3512 /* Directory routines for systems that don't have them. */
3513
3514 #ifdef SYSV_SYSTEM_DIR
3515
3516 #include <dirent.h>
3517
3518 #if defined (BROKEN_CLOSEDIR) || !defined (HAVE_CLOSEDIR)
3519
3520 int
3521 closedir (dirp)
3522 register DIR *dirp; /* stream from opendir */
3523 {
3524 int rtnval;
3525
3526 rtnval = emacs_close (dirp->dd_fd);
3527
3528 /* Some systems (like Solaris) allocate the buffer and the DIR all
3529 in one block. Why in the world are we freeing this ourselves
3530 anyway? */
3531 #if ! (defined (sun) && defined (USG5_4))
3532 xfree ((char *) dirp->dd_buf); /* directory block defined in <dirent.h> */
3533 #endif
3534 xfree ((char *) dirp);
3535
3536 return rtnval;
3537 }
3538 #endif /* BROKEN_CLOSEDIR or not HAVE_CLOSEDIR */
3539 #endif /* SYSV_SYSTEM_DIR */
3540
3541 #ifdef NONSYSTEM_DIR_LIBRARY
3542
3543 DIR *
3544 opendir (filename)
3545 char *filename; /* name of directory */
3546 {
3547 register DIR *dirp; /* -> malloc'ed storage */
3548 register int fd; /* file descriptor for read */
3549 struct stat sbuf; /* result of fstat */
3550
3551 fd = emacs_open (filename, O_RDONLY, 0);
3552 if (fd < 0)
3553 return 0;
3554
3555 BLOCK_INPUT;
3556 if (fstat (fd, &sbuf) < 0
3557 || (sbuf.st_mode & S_IFMT) != S_IFDIR
3558 || (dirp = (DIR *) xmalloc (sizeof (DIR))) == 0)
3559 {
3560 emacs_close (fd);
3561 UNBLOCK_INPUT;
3562 return 0; /* bad luck today */
3563 }
3564 UNBLOCK_INPUT;
3565
3566 dirp->dd_fd = fd;
3567 dirp->dd_loc = dirp->dd_size = 0; /* refill needed */
3568
3569 return dirp;
3570 }
3571
3572 void
3573 closedir (dirp)
3574 register DIR *dirp; /* stream from opendir */
3575 {
3576 emacs_close (dirp->dd_fd);
3577 xfree ((char *) dirp);
3578 }
3579
3580
3581 #ifndef VMS
3582 #define DIRSIZ 14
3583 struct olddir
3584 {
3585 ino_t od_ino; /* inode */
3586 char od_name[DIRSIZ]; /* filename */
3587 };
3588 #endif /* not VMS */
3589
3590 struct direct dir_static; /* simulated directory contents */
3591
3592 /* ARGUSED */
3593 struct direct *
3594 readdir (dirp)
3595 register DIR *dirp; /* stream from opendir */
3596 {
3597 #ifndef VMS
3598 register struct olddir *dp; /* -> directory data */
3599 #else /* VMS */
3600 register struct dir$_name *dp; /* -> directory data */
3601 register struct dir$_version *dv; /* -> version data */
3602 #endif /* VMS */
3603
3604 for (; ;)
3605 {
3606 if (dirp->dd_loc >= dirp->dd_size)
3607 dirp->dd_loc = dirp->dd_size = 0;
3608
3609 if (dirp->dd_size == 0 /* refill buffer */
3610 && (dirp->dd_size = emacs_read (dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ)) <= 0)
3611 return 0;
3612
3613 #ifndef VMS
3614 dp = (struct olddir *) &dirp->dd_buf[dirp->dd_loc];
3615 dirp->dd_loc += sizeof (struct olddir);
3616
3617 if (dp->od_ino != 0) /* not deleted entry */
3618 {
3619 dir_static.d_ino = dp->od_ino;
3620 strncpy (dir_static.d_name, dp->od_name, DIRSIZ);
3621 dir_static.d_name[DIRSIZ] = '\0';
3622 dir_static.d_namlen = strlen (dir_static.d_name);
3623 dir_static.d_reclen = sizeof (struct direct)
3624 - MAXNAMLEN + 3
3625 + dir_static.d_namlen - dir_static.d_namlen % 4;
3626 return &dir_static; /* -> simulated structure */
3627 }
3628 #else /* VMS */
3629 dp = (struct dir$_name *) dirp->dd_buf;
3630 if (dirp->dd_loc == 0)
3631 dirp->dd_loc = (dp->dir$b_namecount&1) ? dp->dir$b_namecount + 1
3632 : dp->dir$b_namecount;
3633 dv = (struct dir$_version *)&dp->dir$t_name[dirp->dd_loc];
3634 dir_static.d_ino = dv->dir$w_fid_num;
3635 dir_static.d_namlen = dp->dir$b_namecount;
3636 dir_static.d_reclen = sizeof (struct direct)
3637 - MAXNAMLEN + 3
3638 + dir_static.d_namlen - dir_static.d_namlen % 4;
3639 strncpy (dir_static.d_name, dp->dir$t_name, dp->dir$b_namecount);
3640 dir_static.d_name[dir_static.d_namlen] = '\0';
3641 dirp->dd_loc = dirp->dd_size; /* only one record at a time */
3642 return &dir_static;
3643 #endif /* VMS */
3644 }
3645 }
3646
3647 #ifdef VMS
3648 /* readdirver is just like readdir except it returns all versions of a file
3649 as separate entries. */
3650
3651 /* ARGUSED */
3652 struct direct *
3653 readdirver (dirp)
3654 register DIR *dirp; /* stream from opendir */
3655 {
3656 register struct dir$_name *dp; /* -> directory data */
3657 register struct dir$_version *dv; /* -> version data */
3658
3659 if (dirp->dd_loc >= dirp->dd_size - sizeof (struct dir$_name))
3660 dirp->dd_loc = dirp->dd_size = 0;
3661
3662 if (dirp->dd_size == 0 /* refill buffer */
3663 && (dirp->dd_size = sys_read (dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ)) <= 0)
3664 return 0;
3665
3666 dp = (struct dir$_name *) dirp->dd_buf;
3667 if (dirp->dd_loc == 0)
3668 dirp->dd_loc = (dp->dir$b_namecount & 1) ? dp->dir$b_namecount + 1
3669 : dp->dir$b_namecount;
3670 dv = (struct dir$_version *) &dp->dir$t_name[dirp->dd_loc];
3671 strncpy (dir_static.d_name, dp->dir$t_name, dp->dir$b_namecount);
3672 sprintf (&dir_static.d_name[dp->dir$b_namecount], ";%d", dv->dir$w_version);
3673 dir_static.d_namlen = strlen (dir_static.d_name);
3674 dir_static.d_ino = dv->dir$w_fid_num;
3675 dir_static.d_reclen = sizeof (struct direct) - MAXNAMLEN + 3
3676 + dir_static.d_namlen - dir_static.d_namlen % 4;
3677 dirp->dd_loc = ((char *) (++dv) - dp->dir$t_name);
3678 return &dir_static;
3679 }
3680
3681 #endif /* VMS */
3682
3683 #endif /* NONSYSTEM_DIR_LIBRARY */
3684
3685 \f
3686 int
3687 set_file_times (filename, atime, mtime)
3688 char *filename;
3689 EMACS_TIME atime, mtime;
3690 {
3691 #ifdef HAVE_UTIMES
3692 struct timeval tv[2];
3693 tv[0] = atime;
3694 tv[1] = mtime;
3695 return utimes (filename, tv);
3696 #else /* not HAVE_UTIMES */
3697 struct utimbuf utb;
3698 utb.actime = EMACS_SECS (atime);
3699 utb.modtime = EMACS_SECS (mtime);
3700 return utime (filename, &utb);
3701 #endif /* not HAVE_UTIMES */
3702 }
3703 \f
3704 /* mkdir and rmdir functions, for systems which don't have them. */
3705
3706 #ifndef HAVE_MKDIR
3707 /*
3708 * Written by Robert Rother, Mariah Corporation, August 1985.
3709 *
3710 * If you want it, it's yours. All I ask in return is that if you
3711 * figure out how to do this in a Bourne Shell script you send me
3712 * a copy.
3713 * sdcsvax!rmr or rmr@uscd
3714 *
3715 * Severely hacked over by John Gilmore to make a 4.2BSD compatible
3716 * subroutine. 11Mar86; hoptoad!gnu
3717 *
3718 * Modified by rmtodd@uokmax 6-28-87 -- when making an already existing dir,
3719 * subroutine didn't return EEXIST. It does now.
3720 */
3721
3722 /*
3723 * Make a directory.
3724 */
3725 #ifdef MKDIR_PROTOTYPE
3726 MKDIR_PROTOTYPE
3727 #else
3728 int
3729 mkdir (dpath, dmode)
3730 char *dpath;
3731 int dmode;
3732 #endif
3733 {
3734 int cpid, status, fd;
3735 struct stat statbuf;
3736
3737 if (stat (dpath, &statbuf) == 0)
3738 {
3739 errno = EEXIST; /* Stat worked, so it already exists */
3740 return -1;
3741 }
3742
3743 /* If stat fails for a reason other than non-existence, return error */
3744 if (errno != ENOENT)
3745 return -1;
3746
3747 synch_process_alive = 1;
3748 switch (cpid = fork ())
3749 {
3750
3751 case -1: /* Error in fork */
3752 return (-1); /* Errno is set already */
3753
3754 case 0: /* Child process */
3755 /*
3756 * Cheap hack to set mode of new directory. Since this
3757 * child process is going away anyway, we zap its umask.
3758 * FIXME, this won't suffice to set SUID, SGID, etc. on this
3759 * directory. Does anybody care?
3760 */
3761 status = umask (0); /* Get current umask */
3762 status = umask (status | (0777 & ~dmode)); /* Set for mkdir */
3763 fd = emacs_open ("/dev/null", O_RDWR, 0);
3764 if (fd >= 0)
3765 {
3766 dup2 (fd, 0);
3767 dup2 (fd, 1);
3768 dup2 (fd, 2);
3769 }
3770 execl ("/bin/mkdir", "mkdir", dpath, (char *) 0);
3771 _exit (-1); /* Can't exec /bin/mkdir */
3772
3773 default: /* Parent process */
3774 wait_for_termination (cpid);
3775 }
3776
3777 if (synch_process_death != 0 || synch_process_retcode != 0)
3778 {
3779 errno = EIO; /* We don't know why, but */
3780 return -1; /* /bin/mkdir failed */
3781 }
3782
3783 return 0;
3784 }
3785 #endif /* not HAVE_MKDIR */
3786
3787 #ifndef HAVE_RMDIR
3788 int
3789 rmdir (dpath)
3790 char *dpath;
3791 {
3792 int cpid, status, fd;
3793 struct stat statbuf;
3794
3795 if (stat (dpath, &statbuf) != 0)
3796 {
3797 /* Stat just set errno. We don't have to */
3798 return -1;
3799 }
3800
3801 synch_process_alive = 1;
3802 switch (cpid = fork ())
3803 {
3804
3805 case -1: /* Error in fork */
3806 return (-1); /* Errno is set already */
3807
3808 case 0: /* Child process */
3809 fd = emacs_open ("/dev/null", O_RDWR, 0);
3810 if (fd >= 0)
3811 {
3812 dup2 (fd, 0);
3813 dup2 (fd, 1);
3814 dup2 (fd, 2);
3815 }
3816 execl ("/bin/rmdir", "rmdir", dpath, (char *) 0);
3817 _exit (-1); /* Can't exec /bin/rmdir */
3818
3819 default: /* Parent process */
3820 wait_for_termination (cpid);
3821 }
3822
3823 if (synch_process_death != 0 || synch_process_retcode != 0)
3824 {
3825 errno = EIO; /* We don't know why, but */
3826 return -1; /* /bin/rmdir failed */
3827 }
3828
3829 return 0;
3830 }
3831 #endif /* !HAVE_RMDIR */
3832
3833
3834 \f
3835 /* Functions for VMS */
3836 #ifdef VMS
3837 #include "vms-pwd.h"
3838 #include <acldef.h>
3839 #include <chpdef.h>
3840 #include <jpidef.h>
3841
3842 /* Return as a string the VMS error string pertaining to STATUS.
3843 Reuses the same static buffer each time it is called. */
3844
3845 char *
3846 vmserrstr (status)
3847 int status; /* VMS status code */
3848 {
3849 int bufadr[2];
3850 short len;
3851 static char buf[257];
3852
3853 bufadr[0] = sizeof buf - 1;
3854 bufadr[1] = (int) buf;
3855 if (! (SYS$GETMSG (status, &len, bufadr, 0x1, 0) & 1))
3856 return "untranslatable VMS error status";
3857 buf[len] = '\0';
3858 return buf;
3859 }
3860
3861 #ifdef access
3862 #undef access
3863
3864 /* The following is necessary because 'access' emulation by VMS C (2.0) does
3865 * not work correctly. (It also doesn't work well in version 2.3.)
3866 */
3867
3868 #ifdef VMS4_4
3869
3870 #define DESCRIPTOR(name,string) struct dsc$descriptor_s name = \
3871 { strlen (string), DSC$K_DTYPE_T, DSC$K_CLASS_S, string }
3872
3873 typedef union {
3874 struct {
3875 unsigned short s_buflen;
3876 unsigned short s_code;
3877 char *s_bufadr;
3878 unsigned short *s_retlenadr;
3879 } s;
3880 int end;
3881 } item;
3882 #define buflen s.s_buflen
3883 #define code s.s_code
3884 #define bufadr s.s_bufadr
3885 #define retlenadr s.s_retlenadr
3886
3887 #define R_OK 4 /* test for read permission */
3888 #define W_OK 2 /* test for write permission */
3889 #define X_OK 1 /* test for execute (search) permission */
3890 #define F_OK 0 /* test for presence of file */
3891
3892 int
3893 sys_access (path, mode)
3894 char *path;
3895 int mode;
3896 {
3897 static char *user = NULL;
3898 char dir_fn[512];
3899
3900 /* translate possible directory spec into .DIR file name, so brain-dead
3901 * access can treat the directory like a file. */
3902 if (directory_file_name (path, dir_fn))
3903 path = dir_fn;
3904
3905 if (mode == F_OK)
3906 return access (path, mode);
3907 if (user == NULL && (user = (char *) getenv ("USER")) == NULL)
3908 return -1;
3909 {
3910 int stat;
3911 int flags;
3912 int acces;
3913 unsigned short int dummy;
3914 item itemlst[3];
3915 static int constant = ACL$C_FILE;
3916 DESCRIPTOR (path_desc, path);
3917 DESCRIPTOR (user_desc, user);
3918
3919 flags = 0;
3920 acces = 0;
3921 if ((mode & X_OK) && ((stat = access (path, mode)) < 0 || mode == X_OK))
3922 return stat;
3923 if (mode & R_OK)
3924 acces |= CHP$M_READ;
3925 if (mode & W_OK)
3926 acces |= CHP$M_WRITE;
3927 itemlst[0].buflen = sizeof (int);
3928 itemlst[0].code = CHP$_FLAGS;
3929 itemlst[0].bufadr = (char *) &flags;
3930 itemlst[0].retlenadr = &dummy;
3931 itemlst[1].buflen = sizeof (int);
3932 itemlst[1].code = CHP$_ACCESS;
3933 itemlst[1].bufadr = (char *) &acces;
3934 itemlst[1].retlenadr = &dummy;
3935 itemlst[2].end = CHP$_END;
3936 stat = SYS$CHECK_ACCESS (&constant, &path_desc, &user_desc, itemlst);
3937 return stat == SS$_NORMAL ? 0 : -1;
3938 }
3939 }
3940
3941 #else /* not VMS4_4 */
3942
3943 #include <prvdef.h>
3944 #define ACE$M_WRITE 2
3945 #define ACE$C_KEYID 1
3946
3947 static unsigned short memid, grpid;
3948 static unsigned int uic;
3949
3950 /* Called from init_sys_modes, so it happens not very often
3951 but at least each time Emacs is loaded. */
3952 void
3953 sys_access_reinit ()
3954 {
3955 uic = 0;
3956 }
3957
3958 int
3959 sys_access (filename, type)
3960 char * filename;
3961 int type;
3962 {
3963 struct FAB fab;
3964 struct XABPRO xab;
3965 int status, size, i, typecode, acl_controlled;
3966 unsigned int *aclptr, *aclend, aclbuf[60];
3967 union prvdef prvmask;
3968
3969 /* Get UIC and GRP values for protection checking. */
3970 if (uic == 0)
3971 {
3972 status = LIB$GETJPI (&JPI$_UIC, 0, 0, &uic, 0, 0);
3973 if (! (status & 1))
3974 return -1;
3975 memid = uic & 0xFFFF;
3976 grpid = uic >> 16;
3977 }
3978
3979 if (type != 2) /* not checking write access */
3980 return access (filename, type);
3981
3982 /* Check write protection. */
3983
3984 #define CHECKPRIV(bit) (prvmask.bit)
3985 #define WRITABLE(field) (! ((xab.xab$w_pro >> field) & XAB$M_NOWRITE))
3986
3987 /* Find privilege bits */
3988 status = SYS$SETPRV (0, 0, 0, prvmask);
3989 if (! (status & 1))
3990 error ("Unable to find privileges: %s", vmserrstr (status));
3991 if (CHECKPRIV (PRV$V_BYPASS))
3992 return 0; /* BYPASS enabled */
3993 fab = cc$rms_fab;
3994 fab.fab$b_fac = FAB$M_GET;
3995 fab.fab$l_fna = filename;
3996 fab.fab$b_fns = strlen (filename);
3997 fab.fab$l_xab = &xab;
3998 xab = cc$rms_xabpro;
3999 xab.xab$l_aclbuf = aclbuf;
4000 xab.xab$w_aclsiz = sizeof (aclbuf);
4001 status = SYS$OPEN (&fab, 0, 0);
4002 if (! (status & 1))
4003 return -1;
4004 SYS$CLOSE (&fab, 0, 0);
4005 /* Check system access */
4006 if (CHECKPRIV (PRV$V_SYSPRV) && WRITABLE (XAB$V_SYS))
4007 return 0;
4008 /* Check ACL entries, if any */
4009 acl_controlled = 0;
4010 if (xab.xab$w_acllen > 0)
4011 {
4012 aclptr = aclbuf;
4013 aclend = &aclbuf[xab.xab$w_acllen / 4];
4014 while (*aclptr && aclptr < aclend)
4015 {
4016 size = (*aclptr & 0xff) / 4;
4017 typecode = (*aclptr >> 8) & 0xff;
4018 if (typecode == ACE$C_KEYID)
4019 for (i = size - 1; i > 1; i--)
4020 if (aclptr[i] == uic)
4021 {
4022 acl_controlled = 1;
4023 if (aclptr[1] & ACE$M_WRITE)
4024 return 0; /* Write access through ACL */
4025 }
4026 aclptr = &aclptr[size];
4027 }
4028 if (acl_controlled) /* ACL specified, prohibits write access */
4029 return -1;
4030 }
4031 /* No ACL entries specified, check normal protection */
4032 if (WRITABLE (XAB$V_WLD)) /* World writable */
4033 return 0;
4034 if (WRITABLE (XAB$V_GRP) &&
4035 (unsigned short) (xab.xab$l_uic >> 16) == grpid)
4036 return 0; /* Group writable */
4037 if (WRITABLE (XAB$V_OWN) &&
4038 (xab.xab$l_uic & 0xFFFF) == memid)
4039 return 0; /* Owner writable */
4040
4041 return -1; /* Not writable */
4042 }
4043 #endif /* not VMS4_4 */
4044 #endif /* access */
4045
4046 static char vtbuf[NAM$C_MAXRSS+1];
4047
4048 /* translate a vms file spec to a unix path */
4049 char *
4050 sys_translate_vms (vfile)
4051 char * vfile;
4052 {
4053 char * p;
4054 char * targ;
4055
4056 if (!vfile)
4057 return 0;
4058
4059 targ = vtbuf;
4060
4061 /* leading device or logical name is a root directory */
4062 if (p = strchr (vfile, ':'))
4063 {
4064 *targ++ = '/';
4065 while (vfile < p)
4066 *targ++ = *vfile++;
4067 vfile++;
4068 *targ++ = '/';
4069 }
4070 p = vfile;
4071 if (*p == '[' || *p == '<')
4072 {
4073 while (*++vfile != *p + 2)
4074 switch (*vfile)
4075 {
4076 case '.':
4077 if (vfile[-1] == *p)
4078 *targ++ = '.';
4079 *targ++ = '/';
4080 break;
4081
4082 case '-':
4083 *targ++ = '.';
4084 *targ++ = '.';
4085 break;
4086
4087 default:
4088 *targ++ = *vfile;
4089 break;
4090 }
4091 vfile++;
4092 *targ++ = '/';
4093 }
4094 while (*vfile)
4095 *targ++ = *vfile++;
4096
4097 return vtbuf;
4098 }
4099
4100 static char utbuf[NAM$C_MAXRSS+1];
4101
4102 /* translate a unix path to a VMS file spec */
4103 char *
4104 sys_translate_unix (ufile)
4105 char * ufile;
4106 {
4107 int slash_seen = 0;
4108 char *p;
4109 char * targ;
4110
4111 if (!ufile)
4112 return 0;
4113
4114 targ = utbuf;
4115
4116 if (*ufile == '/')
4117 {
4118 ufile++;
4119 }
4120
4121 while (*ufile)
4122 {
4123 switch (*ufile)
4124 {
4125 case '/':
4126 if (slash_seen)
4127 if (index (&ufile[1], '/'))
4128 *targ++ = '.';
4129 else
4130 *targ++ = ']';
4131 else
4132 {
4133 *targ++ = ':';
4134 if (index (&ufile[1], '/'))
4135 *targ++ = '[';
4136 slash_seen = 1;
4137 }
4138 break;
4139
4140 case '.':
4141 if (strncmp (ufile, "./", 2) == 0)
4142 {
4143 if (!slash_seen)
4144 {
4145 *targ++ = '[';
4146 slash_seen = 1;
4147 }
4148 ufile++; /* skip the dot */
4149 if (index (&ufile[1], '/'))
4150 *targ++ = '.';
4151 else
4152 *targ++ = ']';
4153 }
4154 else if (strncmp (ufile, "../", 3) == 0)
4155 {
4156 if (!slash_seen)
4157 {
4158 *targ++ = '[';
4159 slash_seen = 1;
4160 }
4161 *targ++ = '-';
4162 ufile += 2; /* skip the dots */
4163 if (index (&ufile[1], '/'))
4164 *targ++ = '.';
4165 else
4166 *targ++ = ']';
4167 }
4168 else
4169 *targ++ = *ufile;
4170 break;
4171
4172 default:
4173 *targ++ = *ufile;
4174 break;
4175 }
4176 ufile++;
4177 }
4178 *targ = '\0';
4179
4180 return utbuf;
4181 }
4182
4183 char *
4184 getwd (pathname)
4185 char *pathname;
4186 {
4187 char *ptr, *val;
4188 extern char *getcwd ();
4189
4190 #define MAXPATHLEN 1024
4191
4192 ptr = xmalloc (MAXPATHLEN);
4193 val = getcwd (ptr, MAXPATHLEN);
4194 if (val == 0)
4195 {
4196 xfree (ptr);
4197 return val;
4198 }
4199 strcpy (pathname, ptr);
4200 xfree (ptr);
4201
4202 return pathname;
4203 }
4204
4205 int
4206 getppid ()
4207 {
4208 long item_code = JPI$_OWNER;
4209 unsigned long parent_id;
4210 int status;
4211
4212 if (((status = LIB$GETJPI (&item_code, 0, 0, &parent_id)) & 1) == 0)
4213 {
4214 errno = EVMSERR;
4215 vaxc$errno = status;
4216 return -1;
4217 }
4218 return parent_id;
4219 }
4220
4221 #undef getuid
4222 unsigned
4223 sys_getuid ()
4224 {
4225 return (getgid () << 16) | getuid ();
4226 }
4227
4228 #undef read
4229 int
4230 sys_read (fildes, buf, nbyte)
4231 int fildes;
4232 char *buf;
4233 unsigned int nbyte;
4234 {
4235 return read (fildes, buf, (nbyte < MAXIOSIZE ? nbyte : MAXIOSIZE));
4236 }
4237
4238 #if 0
4239 int
4240 sys_write (fildes, buf, nbyte)
4241 int fildes;
4242 char *buf;
4243 unsigned int nbyte;
4244 {
4245 register int nwrote, rtnval = 0;
4246
4247 while (nbyte > MAXIOSIZE && (nwrote = write (fildes, buf, MAXIOSIZE)) > 0) {
4248 nbyte -= nwrote;
4249 buf += nwrote;
4250 rtnval += nwrote;
4251 }
4252 if (nwrote < 0)
4253 return rtnval ? rtnval : -1;
4254 if ((nwrote = write (fildes, buf, nbyte)) < 0)
4255 return rtnval ? rtnval : -1;
4256 return (rtnval + nwrote);
4257 }
4258 #endif /* 0 */
4259
4260 /*
4261 * VAX/VMS VAX C RTL really loses. It insists that records
4262 * end with a newline (carriage return) character, and if they
4263 * don't it adds one (nice of it isn't it!)
4264 *
4265 * Thus we do this stupidity below.
4266 */
4267
4268 #undef write
4269 int
4270 sys_write (fildes, buf, nbytes)
4271 int fildes;
4272 char *buf;
4273 unsigned int nbytes;
4274 {
4275 register char *p;
4276 register char *e;
4277 int sum = 0;
4278 struct stat st;
4279
4280 fstat (fildes, &st);
4281 p = buf;
4282 while (nbytes > 0)
4283 {
4284 int len, retval;
4285
4286 /* Handle fixed-length files with carriage control. */
4287 if (st.st_fab_rfm == FAB$C_FIX
4288 && ((st.st_fab_rat & (FAB$M_FTN | FAB$M_CR)) != 0))
4289 {
4290 len = st.st_fab_mrs;
4291 retval = write (fildes, p, min (len, nbytes));
4292 if (retval != len)
4293 return -1;
4294 retval++; /* This skips the implied carriage control */
4295 }
4296 else
4297 {
4298 e = p + min (MAXIOSIZE, nbytes) - 1;
4299 while (*e != '\n' && e > p) e--;
4300 if (p == e) /* Ok.. so here we add a newline... sigh. */
4301 e = p + min (MAXIOSIZE, nbytes) - 1;
4302 len = e + 1 - p;
4303 retval = write (fildes, p, len);
4304 if (retval != len)
4305 return -1;
4306 }
4307 p += retval;
4308 sum += retval;
4309 nbytes -= retval;
4310 }
4311 return sum;
4312 }
4313
4314 /* Create file NEW copying its attributes from file OLD. If
4315 OLD is 0 or does not exist, create based on the value of
4316 vms_stmlf_recfm. */
4317
4318 /* Protection value the file should ultimately have.
4319 Set by create_copy_attrs, and use by rename_sansversions. */
4320 static unsigned short int fab_final_pro;
4321
4322 int
4323 creat_copy_attrs (old, new)
4324 char *old, *new;
4325 {
4326 struct FAB fab = cc$rms_fab;
4327 struct XABPRO xabpro;
4328 char aclbuf[256]; /* Choice of size is arbitrary. See below. */
4329 extern int vms_stmlf_recfm;
4330
4331 if (old)
4332 {
4333 fab.fab$b_fac = FAB$M_GET;
4334 fab.fab$l_fna = old;
4335 fab.fab$b_fns = strlen (old);
4336 fab.fab$l_xab = (char *) &xabpro;
4337 xabpro = cc$rms_xabpro;
4338 xabpro.xab$l_aclbuf = aclbuf;
4339 xabpro.xab$w_aclsiz = sizeof aclbuf;
4340 /* Call $OPEN to fill in the fab & xabpro fields. */
4341 if (SYS$OPEN (&fab, 0, 0) & 1)
4342 {
4343 SYS$CLOSE (&fab, 0, 0);
4344 fab.fab$l_alq = 0; /* zero the allocation quantity */
4345 if (xabpro.xab$w_acllen > 0)
4346 {
4347 if (xabpro.xab$w_acllen > sizeof aclbuf)
4348 /* If the acl buffer was too short, redo open with longer one.
4349 Wouldn't need to do this if there were some system imposed
4350 limit on the size of an ACL, but I can't find any such. */
4351 {
4352 xabpro.xab$l_aclbuf = (char *) alloca (xabpro.xab$w_acllen);
4353 xabpro.xab$w_aclsiz = xabpro.xab$w_acllen;
4354 if (SYS$OPEN (&fab, 0, 0) & 1)
4355 SYS$CLOSE (&fab, 0, 0);
4356 else
4357 old = 0;
4358 }
4359 }
4360 else
4361 xabpro.xab$l_aclbuf = 0;
4362 }
4363 else
4364 old = 0;
4365 }
4366 fab.fab$l_fna = new;
4367 fab.fab$b_fns = strlen (new);
4368 if (!old)
4369 {
4370 fab.fab$l_xab = 0;
4371 fab.fab$b_rfm = vms_stmlf_recfm ? FAB$C_STMLF : FAB$C_VAR;
4372 fab.fab$b_rat = FAB$M_CR;
4373 }
4374
4375 /* Set the file protections such that we will be able to manipulate
4376 this file. Once we are done writing and renaming it, we will set
4377 the protections back. */
4378 if (old)
4379 fab_final_pro = xabpro.xab$w_pro;
4380 else
4381 SYS$SETDFPROT (0, &fab_final_pro);
4382 xabpro.xab$w_pro &= 0xff0f; /* set O:rewd for now. This is set back later. */
4383
4384 /* Create the new file with either default attrs or attrs copied
4385 from old file. */
4386 if (!(SYS$CREATE (&fab, 0, 0) & 1))
4387 return -1;
4388 SYS$CLOSE (&fab, 0, 0);
4389 /* As this is a "replacement" for creat, return a file descriptor
4390 opened for writing. */
4391 return open (new, O_WRONLY);
4392 }
4393
4394 #ifdef creat
4395 #undef creat
4396 #include <varargs.h>
4397 #ifdef __GNUC__
4398 #ifndef va_count
4399 #define va_count(X) ((X) = *(((int *) &(va_alist)) - 1))
4400 #endif
4401 #endif
4402
4403 int
4404 sys_creat (va_alist)
4405 va_dcl
4406 {
4407 va_list list_incrementer;
4408 char *name;
4409 int mode;
4410 int rfd; /* related file descriptor */
4411 int fd; /* Our new file descriptor */
4412 int count;
4413 struct stat st_buf;
4414 char rfm[12];
4415 char rat[15];
4416 char mrs[13];
4417 char fsz[13];
4418 extern int vms_stmlf_recfm;
4419
4420 va_count (count);
4421 va_start (list_incrementer);
4422 name = va_arg (list_incrementer, char *);
4423 mode = va_arg (list_incrementer, int);
4424 if (count > 2)
4425 rfd = va_arg (list_incrementer, int);
4426 va_end (list_incrementer);
4427 if (count > 2)
4428 {
4429 /* Use information from the related file descriptor to set record
4430 format of the newly created file. */
4431 fstat (rfd, &st_buf);
4432 switch (st_buf.st_fab_rfm)
4433 {
4434 case FAB$C_FIX:
4435 strcpy (rfm, "rfm = fix");
4436 sprintf (mrs, "mrs = %d", st_buf.st_fab_mrs);
4437 strcpy (rat, "rat = ");
4438 if (st_buf.st_fab_rat & FAB$M_CR)
4439 strcat (rat, "cr");
4440 else if (st_buf.st_fab_rat & FAB$M_FTN)
4441 strcat (rat, "ftn");
4442 else if (st_buf.st_fab_rat & FAB$M_PRN)
4443 strcat (rat, "prn");
4444 if (st_buf.st_fab_rat & FAB$M_BLK)
4445 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4446 strcat (rat, ", blk");
4447 else
4448 strcat (rat, "blk");
4449 return creat (name, 0, rfm, rat, mrs);
4450
4451 case FAB$C_VFC:
4452 strcpy (rfm, "rfm = vfc");
4453 sprintf (fsz, "fsz = %d", st_buf.st_fab_fsz);
4454 strcpy (rat, "rat = ");
4455 if (st_buf.st_fab_rat & FAB$M_CR)
4456 strcat (rat, "cr");
4457 else if (st_buf.st_fab_rat & FAB$M_FTN)
4458 strcat (rat, "ftn");
4459 else if (st_buf.st_fab_rat & FAB$M_PRN)
4460 strcat (rat, "prn");
4461 if (st_buf.st_fab_rat & FAB$M_BLK)
4462 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4463 strcat (rat, ", blk");
4464 else
4465 strcat (rat, "blk");
4466 return creat (name, 0, rfm, rat, fsz);
4467
4468 case FAB$C_STM:
4469 strcpy (rfm, "rfm = stm");
4470 break;
4471
4472 case FAB$C_STMCR:
4473 strcpy (rfm, "rfm = stmcr");
4474 break;
4475
4476 case FAB$C_STMLF:
4477 strcpy (rfm, "rfm = stmlf");
4478 break;
4479
4480 case FAB$C_UDF:
4481 strcpy (rfm, "rfm = udf");
4482 break;
4483
4484 case FAB$C_VAR:
4485 strcpy (rfm, "rfm = var");
4486 break;
4487 }
4488 strcpy (rat, "rat = ");
4489 if (st_buf.st_fab_rat & FAB$M_CR)
4490 strcat (rat, "cr");
4491 else if (st_buf.st_fab_rat & FAB$M_FTN)
4492 strcat (rat, "ftn");
4493 else if (st_buf.st_fab_rat & FAB$M_PRN)
4494 strcat (rat, "prn");
4495 if (st_buf.st_fab_rat & FAB$M_BLK)
4496 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4497 strcat (rat, ", blk");
4498 else
4499 strcat (rat, "blk");
4500 }
4501 else
4502 {
4503 strcpy (rfm, vms_stmlf_recfm ? "rfm = stmlf" : "rfm=var");
4504 strcpy (rat, "rat=cr");
4505 }
4506 /* Until the VAX C RTL fixes the many bugs with modes, always use
4507 mode 0 to get the user's default protection. */
4508 fd = creat (name, 0, rfm, rat);
4509 if (fd < 0 && errno == EEXIST)
4510 {
4511 if (unlink (name) < 0)
4512 report_file_error ("delete", build_string (name));
4513 fd = creat (name, 0, rfm, rat);
4514 }
4515 return fd;
4516 }
4517 #endif /* creat */
4518
4519 /* fwrite to stdout is S L O W. Speed it up by using fputc...*/
4520 int
4521 sys_fwrite (ptr, size, num, fp)
4522 register char * ptr;
4523 FILE * fp;
4524 {
4525 register int tot = num * size;
4526
4527 while (tot--)
4528 fputc (*ptr++, fp);
4529 return num;
4530 }
4531
4532 /*
4533 * The VMS C library routine creat actually creates a new version of an
4534 * existing file rather than truncating the old version. There are times
4535 * when this is not the desired behavior, for instance, when writing an
4536 * auto save file (you only want one version), or when you don't have
4537 * write permission in the directory containing the file (but the file
4538 * itself is writable). Hence this routine, which is equivalent to
4539 * "close (creat (fn, 0));" on Unix if fn already exists.
4540 */
4541 int
4542 vms_truncate (fn)
4543 char *fn;
4544 {
4545 struct FAB xfab = cc$rms_fab;
4546 struct RAB xrab = cc$rms_rab;
4547 int status;
4548
4549 xfab.fab$l_fop = FAB$M_TEF; /* free allocated but unused blocks on close */
4550 xfab.fab$b_fac = FAB$M_TRN | FAB$M_GET; /* allow truncate and get access */
4551 xfab.fab$b_shr = FAB$M_NIL; /* allow no sharing - file must be locked */
4552 xfab.fab$l_fna = fn;
4553 xfab.fab$b_fns = strlen (fn);
4554 xfab.fab$l_dna = ";0"; /* default to latest version of the file */
4555 xfab.fab$b_dns = 2;
4556 xrab.rab$l_fab = &xfab;
4557
4558 /* This gibberish opens the file, positions to the first record, and
4559 deletes all records from there until the end of file. */
4560 if ((SYS$OPEN (&xfab) & 01) == 01)
4561 {
4562 if ((SYS$CONNECT (&xrab) & 01) == 01 &&
4563 (SYS$FIND (&xrab) & 01) == 01 &&
4564 (SYS$TRUNCATE (&xrab) & 01) == 01)
4565 status = 0;
4566 else
4567 status = -1;
4568 }
4569 else
4570 status = -1;
4571 SYS$CLOSE (&xfab);
4572 return status;
4573 }
4574
4575 /* Define this symbol to actually read SYSUAF.DAT. This requires either
4576 SYSPRV or a readable SYSUAF.DAT. */
4577
4578 #ifdef READ_SYSUAF
4579 /*
4580 * getuaf.c
4581 *
4582 * Routine to read the VMS User Authorization File and return
4583 * a specific user's record.
4584 */
4585
4586 static struct UAF retuaf;
4587
4588 struct UAF *
4589 get_uaf_name (uname)
4590 char * uname;
4591 {
4592 register status;
4593 struct FAB uaf_fab;
4594 struct RAB uaf_rab;
4595
4596 uaf_fab = cc$rms_fab;
4597 uaf_rab = cc$rms_rab;
4598 /* initialize fab fields */
4599 uaf_fab.fab$l_fna = "SYS$SYSTEM:SYSUAF.DAT";
4600 uaf_fab.fab$b_fns = 21;
4601 uaf_fab.fab$b_fac = FAB$M_GET;
4602 uaf_fab.fab$b_org = FAB$C_IDX;
4603 uaf_fab.fab$b_shr = FAB$M_GET|FAB$M_PUT|FAB$M_UPD|FAB$M_DEL;
4604 /* initialize rab fields */
4605 uaf_rab.rab$l_fab = &uaf_fab;
4606 /* open the User Authorization File */
4607 status = SYS$OPEN (&uaf_fab);
4608 if (!(status&1))
4609 {
4610 errno = EVMSERR;
4611 vaxc$errno = status;
4612 return 0;
4613 }
4614 status = SYS$CONNECT (&uaf_rab);
4615 if (!(status&1))
4616 {
4617 errno = EVMSERR;
4618 vaxc$errno = status;
4619 return 0;
4620 }
4621 /* read the requested record - index is in uname */
4622 uaf_rab.rab$l_kbf = uname;
4623 uaf_rab.rab$b_ksz = strlen (uname);
4624 uaf_rab.rab$b_rac = RAB$C_KEY;
4625 uaf_rab.rab$l_ubf = (char *)&retuaf;
4626 uaf_rab.rab$w_usz = sizeof retuaf;
4627 status = SYS$GET (&uaf_rab);
4628 if (!(status&1))
4629 {
4630 errno = EVMSERR;
4631 vaxc$errno = status;
4632 return 0;
4633 }
4634 /* close the User Authorization File */
4635 status = SYS$DISCONNECT (&uaf_rab);
4636 if (!(status&1))
4637 {
4638 errno = EVMSERR;
4639 vaxc$errno = status;
4640 return 0;
4641 }
4642 status = SYS$CLOSE (&uaf_fab);
4643 if (!(status&1))
4644 {
4645 errno = EVMSERR;
4646 vaxc$errno = status;
4647 return 0;
4648 }
4649 return &retuaf;
4650 }
4651
4652 struct UAF *
4653 get_uaf_uic (uic)
4654 unsigned long uic;
4655 {
4656 register status;
4657 struct FAB uaf_fab;
4658 struct RAB uaf_rab;
4659
4660 uaf_fab = cc$rms_fab;
4661 uaf_rab = cc$rms_rab;
4662 /* initialize fab fields */
4663 uaf_fab.fab$l_fna = "SYS$SYSTEM:SYSUAF.DAT";
4664 uaf_fab.fab$b_fns = 21;
4665 uaf_fab.fab$b_fac = FAB$M_GET;
4666 uaf_fab.fab$b_org = FAB$C_IDX;
4667 uaf_fab.fab$b_shr = FAB$M_GET|FAB$M_PUT|FAB$M_UPD|FAB$M_DEL;
4668 /* initialize rab fields */
4669 uaf_rab.rab$l_fab = &uaf_fab;
4670 /* open the User Authorization File */
4671 status = SYS$OPEN (&uaf_fab);
4672 if (!(status&1))
4673 {
4674 errno = EVMSERR;
4675 vaxc$errno = status;
4676 return 0;
4677 }
4678 status = SYS$CONNECT (&uaf_rab);
4679 if (!(status&1))
4680 {
4681 errno = EVMSERR;
4682 vaxc$errno = status;
4683 return 0;
4684 }
4685 /* read the requested record - index is in uic */
4686 uaf_rab.rab$b_krf = 1; /* 1st alternate key */
4687 uaf_rab.rab$l_kbf = (char *) &uic;
4688 uaf_rab.rab$b_ksz = sizeof uic;
4689 uaf_rab.rab$b_rac = RAB$C_KEY;
4690 uaf_rab.rab$l_ubf = (char *)&retuaf;
4691 uaf_rab.rab$w_usz = sizeof retuaf;
4692 status = SYS$GET (&uaf_rab);
4693 if (!(status&1))
4694 {
4695 errno = EVMSERR;
4696 vaxc$errno = status;
4697 return 0;
4698 }
4699 /* close the User Authorization File */
4700 status = SYS$DISCONNECT (&uaf_rab);
4701 if (!(status&1))
4702 {
4703 errno = EVMSERR;
4704 vaxc$errno = status;
4705 return 0;
4706 }
4707 status = SYS$CLOSE (&uaf_fab);
4708 if (!(status&1))
4709 {
4710 errno = EVMSERR;
4711 vaxc$errno = status;
4712 return 0;
4713 }
4714 return &retuaf;
4715 }
4716
4717 static struct passwd retpw;
4718
4719 struct passwd *
4720 cnv_uaf_pw (up)
4721 struct UAF * up;
4722 {
4723 char * ptr;
4724
4725 /* copy these out first because if the username is 32 chars, the next
4726 section will overwrite the first byte of the UIC */
4727 retpw.pw_uid = up->uaf$w_mem;
4728 retpw.pw_gid = up->uaf$w_grp;
4729
4730 /* I suppose this is not the best style, to possibly overwrite one
4731 byte beyond the end of the field, but what the heck... */
4732 ptr = &up->uaf$t_username[UAF$S_USERNAME];
4733 while (ptr[-1] == ' ')
4734 ptr--;
4735 *ptr = '\0';
4736 strcpy (retpw.pw_name, up->uaf$t_username);
4737
4738 /* the rest of these are counted ascii strings */
4739 strncpy (retpw.pw_gecos, &up->uaf$t_owner[1], up->uaf$t_owner[0]);
4740 retpw.pw_gecos[up->uaf$t_owner[0]] = '\0';
4741 strncpy (retpw.pw_dir, &up->uaf$t_defdev[1], up->uaf$t_defdev[0]);
4742 retpw.pw_dir[up->uaf$t_defdev[0]] = '\0';
4743 strncat (retpw.pw_dir, &up->uaf$t_defdir[1], up->uaf$t_defdir[0]);
4744 retpw.pw_dir[up->uaf$t_defdev[0] + up->uaf$t_defdir[0]] = '\0';
4745 strncpy (retpw.pw_shell, &up->uaf$t_defcli[1], up->uaf$t_defcli[0]);
4746 retpw.pw_shell[up->uaf$t_defcli[0]] = '\0';
4747
4748 return &retpw;
4749 }
4750 #else /* not READ_SYSUAF */
4751 static struct passwd retpw;
4752 #endif /* not READ_SYSUAF */
4753
4754 struct passwd *
4755 getpwnam (name)
4756 char * name;
4757 {
4758 #ifdef READ_SYSUAF
4759 struct UAF *up;
4760 #else
4761 char * user;
4762 char * dir;
4763 unsigned char * full;
4764 #endif /* READ_SYSUAF */
4765 char *ptr = name;
4766
4767 while (*ptr)
4768 {
4769 if ('a' <= *ptr && *ptr <= 'z')
4770 *ptr -= 040;
4771 ptr++;
4772 }
4773 #ifdef READ_SYSUAF
4774 if (!(up = get_uaf_name (name)))
4775 return 0;
4776 return cnv_uaf_pw (up);
4777 #else
4778 if (strcmp (name, getenv ("USER")) == 0)
4779 {
4780 retpw.pw_uid = getuid ();
4781 retpw.pw_gid = getgid ();
4782 strcpy (retpw.pw_name, name);
4783 if (full = egetenv ("FULLNAME"))
4784 strcpy (retpw.pw_gecos, full);
4785 else
4786 *retpw.pw_gecos = '\0';
4787 strcpy (retpw.pw_dir, egetenv ("HOME"));
4788 *retpw.pw_shell = '\0';
4789 return &retpw;
4790 }
4791 else
4792 return 0;
4793 #endif /* not READ_SYSUAF */
4794 }
4795
4796 struct passwd *
4797 getpwuid (uid)
4798 unsigned long uid;
4799 {
4800 #ifdef READ_SYSUAF
4801 struct UAF * up;
4802
4803 if (!(up = get_uaf_uic (uid)))
4804 return 0;
4805 return cnv_uaf_pw (up);
4806 #else
4807 if (uid == sys_getuid ())
4808 return getpwnam (egetenv ("USER"));
4809 else
4810 return 0;
4811 #endif /* not READ_SYSUAF */
4812 }
4813
4814 /* return total address space available to the current process. This is
4815 the sum of the current p0 size, p1 size and free page table entries
4816 available. */
4817 int
4818 vlimit ()
4819 {
4820 int item_code;
4821 unsigned long free_pages;
4822 unsigned long frep0va;
4823 unsigned long frep1va;
4824 register status;
4825
4826 item_code = JPI$_FREPTECNT;
4827 if (((status = LIB$GETJPI (&item_code, 0, 0, &free_pages)) & 1) == 0)
4828 {
4829 errno = EVMSERR;
4830 vaxc$errno = status;
4831 return -1;
4832 }
4833 free_pages *= 512;
4834
4835 item_code = JPI$_FREP0VA;
4836 if (((status = LIB$GETJPI (&item_code, 0, 0, &frep0va)) & 1) == 0)
4837 {
4838 errno = EVMSERR;
4839 vaxc$errno = status;
4840 return -1;
4841 }
4842 item_code = JPI$_FREP1VA;
4843 if (((status = LIB$GETJPI (&item_code, 0, 0, &frep1va)) & 1) == 0)
4844 {
4845 errno = EVMSERR;
4846 vaxc$errno = status;
4847 return -1;
4848 }
4849
4850 return free_pages + frep0va + (0x7fffffff - frep1va);
4851 }
4852
4853 int
4854 define_logical_name (varname, string)
4855 char *varname;
4856 char *string;
4857 {
4858 struct dsc$descriptor_s strdsc =
4859 {strlen (string), DSC$K_DTYPE_T, DSC$K_CLASS_S, string};
4860 struct dsc$descriptor_s envdsc =
4861 {strlen (varname), DSC$K_DTYPE_T, DSC$K_CLASS_S, varname};
4862 struct dsc$descriptor_s lnmdsc =
4863 {7, DSC$K_DTYPE_T, DSC$K_CLASS_S, "LNM$JOB"};
4864
4865 return LIB$SET_LOGICAL (&envdsc, &strdsc, &lnmdsc, 0, 0);
4866 }
4867
4868 int
4869 delete_logical_name (varname)
4870 char *varname;
4871 {
4872 struct dsc$descriptor_s envdsc =
4873 {strlen (varname), DSC$K_DTYPE_T, DSC$K_CLASS_S, varname};
4874 struct dsc$descriptor_s lnmdsc =
4875 {7, DSC$K_DTYPE_T, DSC$K_CLASS_S, "LNM$JOB"};
4876
4877 return LIB$DELETE_LOGICAL (&envdsc, &lnmdsc);
4878 }
4879
4880 int
4881 ulimit ()
4882 {
4883 return 0;
4884 }
4885
4886 int
4887 setpgrp ()
4888 {
4889 return 0;
4890 }
4891
4892 int
4893 execvp ()
4894 {
4895 error ("execvp system call not implemented");
4896 return -1;
4897 }
4898
4899 int
4900 rename (from, to)
4901 char *from, *to;
4902 {
4903 int status;
4904 struct FAB from_fab = cc$rms_fab, to_fab = cc$rms_fab;
4905 struct NAM from_nam = cc$rms_nam, to_nam = cc$rms_nam;
4906 char from_esn[NAM$C_MAXRSS];
4907 char to_esn[NAM$C_MAXRSS];
4908
4909 from_fab.fab$l_fna = from;
4910 from_fab.fab$b_fns = strlen (from);
4911 from_fab.fab$l_nam = &from_nam;
4912 from_fab.fab$l_fop = FAB$M_NAM;
4913
4914 from_nam.nam$l_esa = from_esn;
4915 from_nam.nam$b_ess = sizeof from_esn;
4916
4917 to_fab.fab$l_fna = to;
4918 to_fab.fab$b_fns = strlen (to);
4919 to_fab.fab$l_nam = &to_nam;
4920 to_fab.fab$l_fop = FAB$M_NAM;
4921
4922 to_nam.nam$l_esa = to_esn;
4923 to_nam.nam$b_ess = sizeof to_esn;
4924
4925 status = SYS$RENAME (&from_fab, 0, 0, &to_fab);
4926
4927 if (status & 1)
4928 return 0;
4929 else
4930 {
4931 if (status == RMS$_DEV)
4932 errno = EXDEV;
4933 else
4934 errno = EVMSERR;
4935 vaxc$errno = status;
4936 return -1;
4937 }
4938 }
4939
4940 /* This function renames a file like `rename', but it strips
4941 the version number from the "to" filename, such that the "to" file is
4942 will always be a new version. It also sets the file protection once it is
4943 finished. The protection that we will use is stored in fab_final_pro,
4944 and was set when we did a creat_copy_attrs to create the file that we
4945 are renaming.
4946
4947 We could use the chmod function, but Eunichs uses 3 bits per user category
4948 to describe the protection, and VMS uses 4 (write and delete are separate
4949 bits). To maintain portability, the VMS implementation of `chmod' wires
4950 the W and D bits together. */
4951
4952
4953 static struct fibdef fib; /* We need this initialized to zero */
4954 char vms_file_written[NAM$C_MAXRSS];
4955
4956 int
4957 rename_sans_version (from,to)
4958 char *from, *to;
4959 {
4960 short int chan;
4961 int stat;
4962 short int iosb[4];
4963 int status;
4964 struct FAB to_fab = cc$rms_fab;
4965 struct NAM to_nam = cc$rms_nam;
4966 struct dsc$descriptor fib_d ={sizeof (fib),0,0,(char*) &fib};
4967 struct dsc$descriptor fib_attr[2]
4968 = {{sizeof (fab_final_pro),ATR$C_FPRO,0,(char*) &fab_final_pro},{0,0,0,0}};
4969 char to_esn[NAM$C_MAXRSS];
4970
4971 $DESCRIPTOR (disk,to_esn);
4972
4973 to_fab.fab$l_fna = to;
4974 to_fab.fab$b_fns = strlen (to);
4975 to_fab.fab$l_nam = &to_nam;
4976 to_fab.fab$l_fop = FAB$M_NAM;
4977
4978 to_nam.nam$l_esa = to_esn;
4979 to_nam.nam$b_ess = sizeof to_esn;
4980
4981 status = SYS$PARSE (&to_fab, 0, 0); /* figure out the full file name */
4982
4983 if (to_nam.nam$l_fnb && NAM$M_EXP_VER)
4984 *(to_nam.nam$l_ver) = '\0';
4985
4986 stat = rename (from, to_esn);
4987 if (stat < 0)
4988 return stat;
4989
4990 strcpy (vms_file_written, to_esn);
4991
4992 to_fab.fab$l_fna = vms_file_written; /* this points to the versionless name */
4993 to_fab.fab$b_fns = strlen (vms_file_written);
4994
4995 /* Now set the file protection to the correct value */
4996 SYS$OPEN (&to_fab, 0, 0); /* This fills in the nam$w_fid fields */
4997
4998 /* Copy these fields into the fib */
4999 fib.fib$r_fid_overlay.fib$w_fid[0] = to_nam.nam$w_fid[0];
5000 fib.fib$r_fid_overlay.fib$w_fid[1] = to_nam.nam$w_fid[1];
5001 fib.fib$r_fid_overlay.fib$w_fid[2] = to_nam.nam$w_fid[2];
5002
5003 SYS$CLOSE (&to_fab, 0, 0);
5004
5005 stat = SYS$ASSIGN (&disk, &chan, 0, 0); /* open a channel to the disk */
5006 if (!stat)
5007 LIB$SIGNAL (stat);
5008 stat = SYS$QIOW (0, chan, IO$_MODIFY, iosb, 0, 0, &fib_d,
5009 0, 0, 0, &fib_attr, 0);
5010 if (!stat)
5011 LIB$SIGNAL (stat);
5012 stat = SYS$DASSGN (chan);
5013 if (!stat)
5014 LIB$SIGNAL (stat);
5015 strcpy (vms_file_written, to_esn); /* We will write this to the terminal*/
5016 return 0;
5017 }
5018
5019 int
5020 link (file, new)
5021 char * file, * new;
5022 {
5023 register status;
5024 struct FAB fab;
5025 struct NAM nam;
5026 unsigned short fid[3];
5027 char esa[NAM$C_MAXRSS];
5028
5029 fab = cc$rms_fab;
5030 fab.fab$l_fop = FAB$M_OFP;
5031 fab.fab$l_fna = file;
5032 fab.fab$b_fns = strlen (file);
5033 fab.fab$l_nam = &nam;
5034
5035 nam = cc$rms_nam;
5036 nam.nam$l_esa = esa;
5037 nam.nam$b_ess = NAM$C_MAXRSS;
5038
5039 status = SYS$PARSE (&fab);
5040 if ((status & 1) == 0)
5041 {
5042 errno = EVMSERR;
5043 vaxc$errno = status;
5044 return -1;
5045 }
5046 status = SYS$SEARCH (&fab);
5047 if ((status & 1) == 0)
5048 {
5049 errno = EVMSERR;
5050 vaxc$errno = status;
5051 return -1;
5052 }
5053
5054 fid[0] = nam.nam$w_fid[0];
5055 fid[1] = nam.nam$w_fid[1];
5056 fid[2] = nam.nam$w_fid[2];
5057
5058 fab.fab$l_fna = new;
5059 fab.fab$b_fns = strlen (new);
5060
5061 status = SYS$PARSE (&fab);
5062 if ((status & 1) == 0)
5063 {
5064 errno = EVMSERR;
5065 vaxc$errno = status;
5066 return -1;
5067 }
5068
5069 nam.nam$w_fid[0] = fid[0];
5070 nam.nam$w_fid[1] = fid[1];
5071 nam.nam$w_fid[2] = fid[2];
5072
5073 nam.nam$l_esa = nam.nam$l_name;
5074 nam.nam$b_esl = nam.nam$b_name + nam.nam$b_type + nam.nam$b_ver;
5075
5076 status = SYS$ENTER (&fab);
5077 if ((status & 1) == 0)
5078 {
5079 errno = EVMSERR;
5080 vaxc$errno = status;
5081 return -1;
5082 }
5083
5084 return 0;
5085 }
5086
5087 void
5088 croak (badfunc)
5089 char *badfunc;
5090 {
5091 printf ("%s not yet implemented\r\n", badfunc);
5092 reset_sys_modes ();
5093 exit (1);
5094 }
5095
5096 long
5097 random ()
5098 {
5099 /* Arrange to return a range centered on zero. */
5100 return rand () - (1 << 30);
5101 }
5102
5103 void
5104 srandom (seed)
5105 {
5106 srand (seed);
5107 }
5108 #endif /* VMS */
5109 \f
5110 #ifdef AIXHFT
5111
5112 /* Called from init_sys_modes. */
5113 void
5114 hft_init ()
5115 {
5116 int junk;
5117
5118 /* If we're not on an HFT we shouldn't do any of this. We determine
5119 if we are on an HFT by trying to get an HFT error code. If this
5120 call fails, we're not on an HFT. */
5121 #ifdef IBMR2AIX
5122 if (ioctl (0, HFQERROR, &junk) < 0)
5123 return;
5124 #else /* not IBMR2AIX */
5125 if (ioctl (0, HFQEIO, 0) < 0)
5126 return;
5127 #endif /* not IBMR2AIX */
5128
5129 /* On AIX the default hft keyboard mapping uses backspace rather than delete
5130 as the rubout key's ASCII code. Here this is changed. The bug is that
5131 there's no way to determine the old mapping, so in reset_sys_modes
5132 we need to assume that the normal map had been present. Of course, this
5133 code also doesn't help if on a terminal emulator which doesn't understand
5134 HFT VTD's. */
5135 {
5136 struct hfbuf buf;
5137 struct hfkeymap keymap;
5138
5139 buf.hf_bufp = (char *)&keymap;
5140 buf.hf_buflen = sizeof (keymap);
5141 keymap.hf_nkeys = 2;
5142 keymap.hfkey[0].hf_kpos = 15;
5143 keymap.hfkey[0].hf_kstate = HFMAPCHAR | HFSHFNONE;
5144 #ifdef IBMR2AIX
5145 keymap.hfkey[0].hf_keyidh = '<';
5146 #else /* not IBMR2AIX */
5147 keymap.hfkey[0].hf_page = '<';
5148 #endif /* not IBMR2AIX */
5149 keymap.hfkey[0].hf_char = 127;
5150 keymap.hfkey[1].hf_kpos = 15;
5151 keymap.hfkey[1].hf_kstate = HFMAPCHAR | HFSHFSHFT;
5152 #ifdef IBMR2AIX
5153 keymap.hfkey[1].hf_keyidh = '<';
5154 #else /* not IBMR2AIX */
5155 keymap.hfkey[1].hf_page = '<';
5156 #endif /* not IBMR2AIX */
5157 keymap.hfkey[1].hf_char = 127;
5158 hftctl (0, HFSKBD, &buf);
5159 }
5160 /* The HFT system on AIX doesn't optimize for scrolling, so it's really ugly
5161 at times. */
5162 line_ins_del_ok = char_ins_del_ok = 0;
5163 }
5164
5165 /* Reset the rubout key to backspace. */
5166
5167 void
5168 hft_reset ()
5169 {
5170 struct hfbuf buf;
5171 struct hfkeymap keymap;
5172 int junk;
5173
5174 #ifdef IBMR2AIX
5175 if (ioctl (0, HFQERROR, &junk) < 0)
5176 return;
5177 #else /* not IBMR2AIX */
5178 if (ioctl (0, HFQEIO, 0) < 0)
5179 return;
5180 #endif /* not IBMR2AIX */
5181
5182 buf.hf_bufp = (char *)&keymap;
5183 buf.hf_buflen = sizeof (keymap);
5184 keymap.hf_nkeys = 2;
5185 keymap.hfkey[0].hf_kpos = 15;
5186 keymap.hfkey[0].hf_kstate = HFMAPCHAR | HFSHFNONE;
5187 #ifdef IBMR2AIX
5188 keymap.hfkey[0].hf_keyidh = '<';
5189 #else /* not IBMR2AIX */
5190 keymap.hfkey[0].hf_page = '<';
5191 #endif /* not IBMR2AIX */
5192 keymap.hfkey[0].hf_char = 8;
5193 keymap.hfkey[1].hf_kpos = 15;
5194 keymap.hfkey[1].hf_kstate = HFMAPCHAR | HFSHFSHFT;
5195 #ifdef IBMR2AIX
5196 keymap.hfkey[1].hf_keyidh = '<';
5197 #else /* not IBMR2AIX */
5198 keymap.hfkey[1].hf_page = '<';
5199 #endif /* not IBMR2AIX */
5200 keymap.hfkey[1].hf_char = 8;
5201 hftctl (0, HFSKBD, &buf);
5202 }
5203
5204 #endif /* AIXHFT */
5205
5206 #ifdef USE_DL_STUBS
5207
5208 /* These are included on Sunos 4.1 when we do not use shared libraries.
5209 X11 libraries may refer to these functions but (we hope) do not
5210 actually call them. */
5211
5212 void *
5213 dlopen ()
5214 {
5215 return 0;
5216 }
5217
5218 void *
5219 dlsym ()
5220 {
5221 return 0;
5222 }
5223
5224 int
5225 dlclose ()
5226 {
5227 return -1;
5228 }
5229
5230 #endif /* USE_DL_STUBS */
5231 \f
5232 #ifndef BSTRING
5233
5234 #ifndef bzero
5235
5236 void
5237 bzero (b, length)
5238 register char *b;
5239 register int length;
5240 {
5241 #ifdef VMS
5242 short zero = 0;
5243 long max_str = 65535;
5244
5245 while (length > max_str) {
5246 (void) LIB$MOVC5 (&zero, &zero, &zero, &max_str, b);
5247 length -= max_str;
5248 b += max_str;
5249 }
5250 max_str = length;
5251 (void) LIB$MOVC5 (&zero, &zero, &zero, &max_str, b);
5252 #else
5253 while (length-- > 0)
5254 *b++ = 0;
5255 #endif /* not VMS */
5256 }
5257
5258 #endif /* no bzero */
5259 #endif /* BSTRING */
5260
5261 #if (!defined (BSTRING) && !defined (bcopy)) || defined (NEED_BCOPY)
5262 #undef bcopy
5263
5264 /* Saying `void' requires a declaration, above, where bcopy is used
5265 and that declaration causes pain for systems where bcopy is a macro. */
5266 bcopy (b1, b2, length)
5267 register char *b1;
5268 register char *b2;
5269 register int length;
5270 {
5271 #ifdef VMS
5272 long max_str = 65535;
5273
5274 while (length > max_str) {
5275 (void) LIB$MOVC3 (&max_str, b1, b2);
5276 length -= max_str;
5277 b1 += max_str;
5278 b2 += max_str;
5279 }
5280 max_str = length;
5281 (void) LIB$MOVC3 (&length, b1, b2);
5282 #else
5283 while (length-- > 0)
5284 *b2++ = *b1++;
5285 #endif /* not VMS */
5286 }
5287 #endif /* (!defined (BSTRING) && !defined (bcopy)) || defined (NEED_BCOPY) */
5288
5289 #ifndef BSTRING
5290 #ifndef bcmp
5291 int
5292 bcmp (b1, b2, length) /* This could be a macro! */
5293 register char *b1;
5294 register char *b2;
5295 register int length;
5296 {
5297 #ifdef VMS
5298 struct dsc$descriptor_s src1 = {length, DSC$K_DTYPE_T, DSC$K_CLASS_S, b1};
5299 struct dsc$descriptor_s src2 = {length, DSC$K_DTYPE_T, DSC$K_CLASS_S, b2};
5300
5301 return STR$COMPARE (&src1, &src2);
5302 #else
5303 while (length-- > 0)
5304 if (*b1++ != *b2++)
5305 return 1;
5306
5307 return 0;
5308 #endif /* not VMS */
5309 }
5310 #endif /* no bcmp */
5311 #endif /* not BSTRING */
5312 \f
5313 #ifndef HAVE_STRSIGNAL
5314 char *
5315 strsignal (code)
5316 int code;
5317 {
5318 char *signame = 0;
5319
5320 if (0 <= code && code < NSIG)
5321 {
5322 #ifdef VMS
5323 signame = sys_errlist[code];
5324 #else
5325 /* Cast to suppress warning if the table has const char *. */
5326 signame = (char *) sys_siglist[code];
5327 #endif
5328 }
5329
5330 return signame;
5331 }
5332 #endif /* HAVE_STRSIGNAL */
5333