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* m/att3b.h (XINT): Don't define.
[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 (SCHARS (dir) + 2);
799 len = SCHARS (dir);
800 bcopy (SDATA (dir), 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 \f
2264 /* init_system_name sets up the string for the Lisp function
2265 system-name to return. */
2266
2267 #ifdef BSD4_1
2268 #include <whoami.h>
2269 #endif
2270
2271 extern Lisp_Object Vsystem_name;
2272
2273 #ifndef BSD4_1
2274 #ifndef VMS
2275 #ifdef HAVE_SOCKETS
2276 #include <sys/socket.h>
2277 #include <netdb.h>
2278 #endif /* HAVE_SOCKETS */
2279 #endif /* not VMS */
2280 #endif /* not BSD4_1 */
2281
2282 #ifdef TRY_AGAIN
2283 #ifndef HAVE_H_ERRNO
2284 extern int h_errno;
2285 #endif
2286 #endif /* TRY_AGAIN */
2287
2288 void
2289 init_system_name ()
2290 {
2291 #ifdef BSD4_1
2292 Vsystem_name = build_string (sysname);
2293 #else
2294 #ifdef VMS
2295 char *sp, *end;
2296 if ((sp = egetenv ("SYS$NODE")) == 0)
2297 Vsystem_name = build_string ("vax-vms");
2298 else if ((end = index (sp, ':')) == 0)
2299 Vsystem_name = build_string (sp);
2300 else
2301 Vsystem_name = make_string (sp, end - sp);
2302 #else
2303 #ifndef HAVE_GETHOSTNAME
2304 struct utsname uts;
2305 uname (&uts);
2306 Vsystem_name = build_string (uts.nodename);
2307 #else /* HAVE_GETHOSTNAME */
2308 unsigned int hostname_size = 256;
2309 char *hostname = (char *) alloca (hostname_size);
2310
2311 /* Try to get the host name; if the buffer is too short, try
2312 again. Apparently, the only indication gethostname gives of
2313 whether the buffer was large enough is the presence or absence
2314 of a '\0' in the string. Eech. */
2315 for (;;)
2316 {
2317 gethostname (hostname, hostname_size - 1);
2318 hostname[hostname_size - 1] = '\0';
2319
2320 /* Was the buffer large enough for the '\0'? */
2321 if (strlen (hostname) < hostname_size - 1)
2322 break;
2323
2324 hostname_size <<= 1;
2325 hostname = (char *) alloca (hostname_size);
2326 }
2327 #ifdef HAVE_SOCKETS
2328 /* Turn the hostname into the official, fully-qualified hostname.
2329 Don't do this if we're going to dump; this can confuse system
2330 libraries on some machines and make the dumped emacs core dump. */
2331 #ifndef CANNOT_DUMP
2332 if (initialized)
2333 #endif /* not CANNOT_DUMP */
2334 if (! index (hostname, '.'))
2335 {
2336 struct hostent *hp;
2337 int count;
2338 for (count = 0;; count++)
2339 {
2340 #ifdef TRY_AGAIN
2341 h_errno = 0;
2342 #endif
2343 hp = gethostbyname (hostname);
2344 #ifdef TRY_AGAIN
2345 if (! (hp == 0 && h_errno == TRY_AGAIN))
2346 #endif
2347 break;
2348 if (count >= 5)
2349 break;
2350 Fsleep_for (make_number (1), Qnil);
2351 }
2352 if (hp)
2353 {
2354 char *fqdn = (char *) hp->h_name;
2355 #if 0
2356 char *p;
2357 #endif
2358
2359 if (!index (fqdn, '.'))
2360 {
2361 /* We still don't have a fully qualified domain name.
2362 Try to find one in the list of alternate names */
2363 char **alias = hp->h_aliases;
2364 while (*alias && !index (*alias, '.'))
2365 alias++;
2366 if (*alias)
2367 fqdn = *alias;
2368 }
2369 hostname = fqdn;
2370 #if 0
2371 /* Convert the host name to lower case. */
2372 /* Using ctype.h here would introduce a possible locale
2373 dependence that is probably wrong for hostnames. */
2374 p = hostname;
2375 while (*p)
2376 {
2377 if (*p >= 'A' && *p <= 'Z')
2378 *p += 'a' - 'A';
2379 p++;
2380 }
2381 #endif
2382 }
2383 }
2384 #endif /* HAVE_SOCKETS */
2385 /* We used to try using getdomainname here,
2386 but NIIBE Yutaka <gniibe@etl.go.jp> says that
2387 getdomainname gets the NIS/YP domain which often is not the same
2388 as in Internet domain name. */
2389 #if 0 /* Turned off because sysinfo is not really likely to return the
2390 correct Internet domain. */
2391 #if (HAVE_SYSINFO && defined (SI_SRPC_DOMAIN))
2392 if (! index (hostname, '.'))
2393 {
2394 /* The hostname is not fully qualified. Append the domain name. */
2395
2396 int hostlen = strlen (hostname);
2397 int domain_size = 256;
2398
2399 for (;;)
2400 {
2401 char *domain = (char *) alloca (domain_size + 1);
2402 char *fqdn = (char *) alloca (hostlen + 1 + domain_size + 1);
2403 int sys_domain_size = sysinfo (SI_SRPC_DOMAIN, domain, domain_size);
2404 if (sys_domain_size <= 0)
2405 break;
2406 if (domain_size < sys_domain_size)
2407 {
2408 domain_size = sys_domain_size;
2409 continue;
2410 }
2411 strcpy (fqdn, hostname);
2412 if (domain[0] == '.')
2413 strcpy (fqdn + hostlen, domain);
2414 else if (domain[0] != 0)
2415 {
2416 fqdn[hostlen] = '.';
2417 strcpy (fqdn + hostlen + 1, domain);
2418 }
2419 hostname = fqdn;
2420 break;
2421 }
2422 }
2423 #endif /* HAVE_SYSINFO && defined (SI_SRPC_DOMAIN) */
2424 #endif /* 0 */
2425 Vsystem_name = build_string (hostname);
2426 #endif /* HAVE_GETHOSTNAME */
2427 #endif /* VMS */
2428 #endif /* BSD4_1 */
2429 {
2430 unsigned char *p;
2431 for (p = SDATA (Vsystem_name); *p; p++)
2432 if (*p == ' ' || *p == '\t')
2433 *p = '-';
2434 }
2435 }
2436 \f
2437 #ifndef MSDOS
2438 #ifndef VMS
2439 #if !defined (HAVE_SELECT) || defined (BROKEN_SELECT_NON_X)
2440
2441 #include "sysselect.h"
2442 #undef select
2443
2444 #if defined (HAVE_X_WINDOWS) && !defined (HAVE_SELECT)
2445 /* Cause explanatory error message at compile time,
2446 since the select emulation is not good enough for X. */
2447 int *x = &x_windows_lose_if_no_select_system_call;
2448 #endif
2449
2450 /* Emulate as much as select as is possible under 4.1 and needed by Gnu Emacs
2451 * Only checks read descriptors.
2452 */
2453 /* How long to wait between checking fds in select */
2454 #define SELECT_PAUSE 1
2455 int select_alarmed;
2456
2457 /* For longjmp'ing back to read_input_waiting. */
2458
2459 jmp_buf read_alarm_throw;
2460
2461 /* Nonzero if the alarm signal should throw back to read_input_waiting.
2462 The read_socket_hook function sets this to 1 while it is waiting. */
2463
2464 int read_alarm_should_throw;
2465
2466 SIGTYPE
2467 select_alarm ()
2468 {
2469 select_alarmed = 1;
2470 #ifdef BSD4_1
2471 sigrelse (SIGALRM);
2472 #else /* not BSD4_1 */
2473 signal (SIGALRM, SIG_IGN);
2474 #endif /* not BSD4_1 */
2475 if (read_alarm_should_throw)
2476 longjmp (read_alarm_throw, 1);
2477 }
2478
2479 #ifndef WINDOWSNT
2480 /* Only rfds are checked. */
2481 int
2482 sys_select (nfds, rfds, wfds, efds, timeout)
2483 int nfds;
2484 SELECT_TYPE *rfds, *wfds, *efds;
2485 EMACS_TIME *timeout;
2486 {
2487 int ravail = 0;
2488 SELECT_TYPE orfds;
2489 int timeoutval;
2490 int *local_timeout;
2491 extern int proc_buffered_char[];
2492 #ifndef subprocesses
2493 int process_tick = 0, update_tick = 0;
2494 #else
2495 extern int process_tick, update_tick;
2496 #endif
2497 unsigned char buf;
2498
2499 #if defined (HAVE_SELECT) && defined (HAVE_X_WINDOWS)
2500 /* If we're using X, then the native select will work; we only need the
2501 emulation for non-X usage. */
2502 if (!NILP (Vwindow_system))
2503 return select (nfds, rfds, wfds, efds, timeout);
2504 #endif
2505 timeoutval = timeout ? EMACS_SECS (*timeout) : 100000;
2506 local_timeout = &timeoutval;
2507 FD_ZERO (&orfds);
2508 if (rfds)
2509 {
2510 orfds = *rfds;
2511 FD_ZERO (rfds);
2512 }
2513 if (wfds)
2514 FD_ZERO (wfds);
2515 if (efds)
2516 FD_ZERO (efds);
2517
2518 /* If we are looking only for the terminal, with no timeout,
2519 just read it and wait -- that's more efficient. */
2520 if (*local_timeout == 100000 && process_tick == update_tick
2521 && FD_ISSET (0, &orfds))
2522 {
2523 int fd;
2524 for (fd = 1; fd < nfds; ++fd)
2525 if (FD_ISSET (fd, &orfds))
2526 goto hardway;
2527 if (! detect_input_pending ())
2528 read_input_waiting ();
2529 FD_SET (0, rfds);
2530 return 1;
2531 }
2532
2533 hardway:
2534 /* Once a second, till the timer expires, check all the flagged read
2535 * descriptors to see if any input is available. If there is some then
2536 * set the corresponding bit in the return copy of rfds.
2537 */
2538 while (1)
2539 {
2540 register int to_check, fd;
2541
2542 if (rfds)
2543 {
2544 for (to_check = nfds, fd = 0; --to_check >= 0; fd++)
2545 {
2546 if (FD_ISSET (fd, &orfds))
2547 {
2548 int avail = 0, status = 0;
2549
2550 if (fd == 0)
2551 avail = detect_input_pending (); /* Special keyboard handler */
2552 else
2553 {
2554 #ifdef FIONREAD
2555 status = ioctl (fd, FIONREAD, &avail);
2556 #else /* no FIONREAD */
2557 /* Hoping it will return -1 if nothing available
2558 or 0 if all 0 chars requested are read. */
2559 if (proc_buffered_char[fd] >= 0)
2560 avail = 1;
2561 else
2562 {
2563 avail = read (fd, &buf, 1);
2564 if (avail > 0)
2565 proc_buffered_char[fd] = buf;
2566 }
2567 #endif /* no FIONREAD */
2568 }
2569 if (status >= 0 && avail > 0)
2570 {
2571 FD_SET (fd, rfds);
2572 ravail++;
2573 }
2574 }
2575 }
2576 }
2577 if (*local_timeout == 0 || ravail != 0 || process_tick != update_tick)
2578 break;
2579
2580 turn_on_atimers (0);
2581 signal (SIGALRM, select_alarm);
2582 select_alarmed = 0;
2583 alarm (SELECT_PAUSE);
2584
2585 /* Wait for a SIGALRM (or maybe a SIGTINT) */
2586 while (select_alarmed == 0 && *local_timeout != 0
2587 && process_tick == update_tick)
2588 {
2589 /* If we are interested in terminal input,
2590 wait by reading the terminal.
2591 That makes instant wakeup for terminal input at least. */
2592 if (FD_ISSET (0, &orfds))
2593 {
2594 read_input_waiting ();
2595 if (detect_input_pending ())
2596 select_alarmed = 1;
2597 }
2598 else
2599 pause ();
2600 }
2601 (*local_timeout) -= SELECT_PAUSE;
2602
2603 /* Reset the old alarm if there was one. */
2604 turn_on_atimers (1);
2605
2606 if (*local_timeout == 0) /* Stop on timer being cleared */
2607 break;
2608 }
2609 return ravail;
2610 }
2611 #endif /* not WINDOWSNT */
2612
2613 /* Read keyboard input into the standard buffer,
2614 waiting for at least one character. */
2615
2616 /* Make all keyboard buffers much bigger when using a window system. */
2617 #ifdef HAVE_WINDOW_SYSTEM
2618 #define BUFFER_SIZE_FACTOR 16
2619 #else
2620 #define BUFFER_SIZE_FACTOR 1
2621 #endif
2622
2623 void
2624 read_input_waiting ()
2625 {
2626 struct input_event e;
2627 int nread, i;
2628 extern int quit_char;
2629
2630 if (read_socket_hook)
2631 {
2632 struct input_event buf[256];
2633
2634 read_alarm_should_throw = 0;
2635 if (! setjmp (read_alarm_throw))
2636 nread = (*read_socket_hook) (0, buf, 256, 1);
2637 else
2638 nread = -1;
2639
2640 /* Scan the chars for C-g and store them in kbd_buffer. */
2641 for (i = 0; i < nread; i++)
2642 {
2643 kbd_buffer_store_event (&buf[i]);
2644 /* Don't look at input that follows a C-g too closely.
2645 This reduces lossage due to autorepeat on C-g. */
2646 if (buf[i].kind == ASCII_KEYSTROKE_EVENT
2647 && buf[i].code == quit_char)
2648 break;
2649 }
2650 }
2651 else
2652 {
2653 char buf[3];
2654 nread = read (fileno (stdin), buf, 1);
2655
2656 /* Scan the chars for C-g and store them in kbd_buffer. */
2657 e.kind = ASCII_KEYSTROKE_EVENT;
2658 e.frame_or_window = selected_frame;
2659 e.modifiers = 0;
2660 for (i = 0; i < nread; i++)
2661 {
2662 /* Convert chars > 0177 to meta events if desired.
2663 We do this under the same conditions that read_avail_input does. */
2664 if (read_socket_hook == 0)
2665 {
2666 /* If the user says she has a meta key, then believe her. */
2667 if (meta_key == 1 && (buf[i] & 0x80))
2668 e.modifiers = meta_modifier;
2669 if (meta_key != 2)
2670 buf[i] &= ~0x80;
2671 }
2672
2673 XSETINT (e.code, buf[i]);
2674 kbd_buffer_store_event (&e);
2675 /* Don't look at input that follows a C-g too closely.
2676 This reduces lossage due to autorepeat on C-g. */
2677 if (buf[i] == quit_char)
2678 break;
2679 }
2680 }
2681 }
2682
2683 #endif /* not HAVE_SELECT */
2684 #endif /* not VMS */
2685 #endif /* not MSDOS */
2686 \f
2687 #ifdef BSD4_1
2688 void
2689 init_sigio (fd)
2690 int fd;
2691 {
2692 if (noninteractive)
2693 return;
2694 lmode = LINTRUP | lmode;
2695 ioctl (fd, TIOCLSET, &lmode);
2696 }
2697
2698 void
2699 reset_sigio ()
2700 {
2701 if (noninteractive)
2702 return;
2703 lmode = ~LINTRUP & lmode;
2704 ioctl (0, TIOCLSET, &lmode);
2705 }
2706
2707 void
2708 request_sigio ()
2709 {
2710 sigrelse (SIGTINT);
2711
2712 interrupts_deferred = 0;
2713 }
2714
2715 void
2716 unrequest_sigio ()
2717 {
2718 sighold (SIGTINT);
2719
2720 interrupts_deferred = 1;
2721 }
2722
2723 /* still inside #ifdef BSD4_1 */
2724 #ifdef subprocesses
2725
2726 int sigheld; /* Mask of held signals */
2727
2728 void
2729 sigholdx (signum)
2730 int signum;
2731 {
2732 sigheld |= sigbit (signum);
2733 sighold (signum);
2734 }
2735
2736 void
2737 sigisheld (signum)
2738 int signum;
2739 {
2740 sigheld |= sigbit (signum);
2741 }
2742
2743 void
2744 sigunhold (signum)
2745 int signum;
2746 {
2747 sigheld &= ~sigbit (signum);
2748 sigrelse (signum);
2749 }
2750
2751 void
2752 sigfree () /* Free all held signals */
2753 {
2754 int i;
2755 for (i = 0; i < NSIG; i++)
2756 if (sigheld & sigbit (i))
2757 sigrelse (i);
2758 sigheld = 0;
2759 }
2760
2761 int
2762 sigbit (i)
2763 {
2764 return 1 << (i - 1);
2765 }
2766 #endif /* subprocesses */
2767 #endif /* BSD4_1 */
2768 \f
2769 /* POSIX signals support - DJB */
2770 /* Anyone with POSIX signals should have ANSI C declarations */
2771
2772 #ifdef POSIX_SIGNALS
2773
2774 sigset_t empty_mask, full_mask;
2775
2776 signal_handler_t
2777 sys_signal (int signal_number, signal_handler_t action)
2778 {
2779 struct sigaction new_action, old_action;
2780 sigemptyset (&new_action.sa_mask);
2781 new_action.sa_handler = action;
2782 #if defined (SA_RESTART) && ! defined (BROKEN_SA_RESTART)
2783 /* Emacs mostly works better with restartable system services. If this
2784 flag exists, we probably want to turn it on here.
2785 However, on some systems this resets the timeout of `select'
2786 which means that `select' never finishes if it keeps getting signals.
2787 BROKEN_SA_RESTART is defined on those systems. */
2788 new_action.sa_flags = SA_RESTART;
2789 #else
2790 new_action.sa_flags = 0;
2791 #endif
2792 sigaction (signal_number, &new_action, &old_action);
2793 return (old_action.sa_handler);
2794 }
2795
2796 #ifndef __GNUC__
2797 /* If we're compiling with GCC, we don't need this function, since it
2798 can be written as a macro. */
2799 sigset_t
2800 sys_sigmask (int sig)
2801 {
2802 sigset_t mask;
2803 sigemptyset (&mask);
2804 sigaddset (&mask, sig);
2805 return mask;
2806 }
2807 #endif
2808
2809 /* I'd like to have these guys return pointers to the mask storage in here,
2810 but there'd be trouble if the code was saving multiple masks. I'll be
2811 safe and pass the structure. It normally won't be more than 2 bytes
2812 anyhow. - DJB */
2813
2814 sigset_t
2815 sys_sigblock (sigset_t new_mask)
2816 {
2817 sigset_t old_mask;
2818 sigprocmask (SIG_BLOCK, &new_mask, &old_mask);
2819 return (old_mask);
2820 }
2821
2822 sigset_t
2823 sys_sigunblock (sigset_t new_mask)
2824 {
2825 sigset_t old_mask;
2826 sigprocmask (SIG_UNBLOCK, &new_mask, &old_mask);
2827 return (old_mask);
2828 }
2829
2830 sigset_t
2831 sys_sigsetmask (sigset_t new_mask)
2832 {
2833 sigset_t old_mask;
2834 sigprocmask (SIG_SETMASK, &new_mask, &old_mask);
2835 return (old_mask);
2836 }
2837
2838 #endif /* POSIX_SIGNALS */
2839 \f
2840 #if !defined HAVE_STRSIGNAL && !defined SYS_SIGLIST_DECLARED
2841 static char *my_sys_siglist[NSIG];
2842 # ifdef sys_siglist
2843 # undef sys_siglist
2844 # endif
2845 # define sys_siglist my_sys_siglist
2846 #endif
2847
2848 void
2849 init_signals ()
2850 {
2851 #ifdef POSIX_SIGNALS
2852 sigemptyset (&empty_mask);
2853 sigfillset (&full_mask);
2854 #endif
2855
2856 #if !defined HAVE_STRSIGNAL && !defined SYS_SIGLIST_DECLARED
2857 if (! initialized)
2858 {
2859 # ifdef SIGABRT
2860 sys_siglist[SIGABRT] = "Aborted";
2861 # endif
2862 # ifdef SIGAIO
2863 sys_siglist[SIGAIO] = "LAN I/O interrupt";
2864 # endif
2865 # ifdef SIGALRM
2866 sys_siglist[SIGALRM] = "Alarm clock";
2867 # endif
2868 # ifdef SIGBUS
2869 sys_siglist[SIGBUS] = "Bus error";
2870 # endif
2871 # ifdef SIGCLD
2872 sys_siglist[SIGCLD] = "Child status changed";
2873 # endif
2874 # ifdef SIGCHLD
2875 sys_siglist[SIGCHLD] = "Child status changed";
2876 # endif
2877 # ifdef SIGCONT
2878 sys_siglist[SIGCONT] = "Continued";
2879 # endif
2880 # ifdef SIGDANGER
2881 sys_siglist[SIGDANGER] = "Swap space dangerously low";
2882 # endif
2883 # ifdef SIGDGNOTIFY
2884 sys_siglist[SIGDGNOTIFY] = "Notification message in queue";
2885 # endif
2886 # ifdef SIGEMT
2887 sys_siglist[SIGEMT] = "Emulation trap";
2888 # endif
2889 # ifdef SIGFPE
2890 sys_siglist[SIGFPE] = "Arithmetic exception";
2891 # endif
2892 # ifdef SIGFREEZE
2893 sys_siglist[SIGFREEZE] = "SIGFREEZE";
2894 # endif
2895 # ifdef SIGGRANT
2896 sys_siglist[SIGGRANT] = "Monitor mode granted";
2897 # endif
2898 # ifdef SIGHUP
2899 sys_siglist[SIGHUP] = "Hangup";
2900 # endif
2901 # ifdef SIGILL
2902 sys_siglist[SIGILL] = "Illegal instruction";
2903 # endif
2904 # ifdef SIGINT
2905 sys_siglist[SIGINT] = "Interrupt";
2906 # endif
2907 # ifdef SIGIO
2908 sys_siglist[SIGIO] = "I/O possible";
2909 # endif
2910 # ifdef SIGIOINT
2911 sys_siglist[SIGIOINT] = "I/O intervention required";
2912 # endif
2913 # ifdef SIGIOT
2914 sys_siglist[SIGIOT] = "IOT trap";
2915 # endif
2916 # ifdef SIGKILL
2917 sys_siglist[SIGKILL] = "Killed";
2918 # endif
2919 # ifdef SIGLOST
2920 sys_siglist[SIGLOST] = "Resource lost";
2921 # endif
2922 # ifdef SIGLWP
2923 sys_siglist[SIGLWP] = "SIGLWP";
2924 # endif
2925 # ifdef SIGMSG
2926 sys_siglist[SIGMSG] = "Monitor mode data available";
2927 # endif
2928 # ifdef SIGPHONE
2929 sys_siglist[SIGWIND] = "SIGPHONE";
2930 # endif
2931 # ifdef SIGPIPE
2932 sys_siglist[SIGPIPE] = "Broken pipe";
2933 # endif
2934 # ifdef SIGPOLL
2935 sys_siglist[SIGPOLL] = "Pollable event occurred";
2936 # endif
2937 # ifdef SIGPROF
2938 sys_siglist[SIGPROF] = "Profiling timer expired";
2939 # endif
2940 # ifdef SIGPTY
2941 sys_siglist[SIGPTY] = "PTY I/O interrupt";
2942 # endif
2943 # ifdef SIGPWR
2944 sys_siglist[SIGPWR] = "Power-fail restart";
2945 # endif
2946 # ifdef SIGQUIT
2947 sys_siglist[SIGQUIT] = "Quit";
2948 # endif
2949 # ifdef SIGRETRACT
2950 sys_siglist[SIGRETRACT] = "Need to relinguish monitor mode";
2951 # endif
2952 # ifdef SIGSAK
2953 sys_siglist[SIGSAK] = "Secure attention";
2954 # endif
2955 # ifdef SIGSEGV
2956 sys_siglist[SIGSEGV] = "Segmentation violation";
2957 # endif
2958 # ifdef SIGSOUND
2959 sys_siglist[SIGSOUND] = "Sound completed";
2960 # endif
2961 # ifdef SIGSTOP
2962 sys_siglist[SIGSTOP] = "Stopped (signal)";
2963 # endif
2964 # ifdef SIGSTP
2965 sys_siglist[SIGSTP] = "Stopped (user)";
2966 # endif
2967 # ifdef SIGSYS
2968 sys_siglist[SIGSYS] = "Bad argument to system call";
2969 # endif
2970 # ifdef SIGTERM
2971 sys_siglist[SIGTERM] = "Terminated";
2972 # endif
2973 # ifdef SIGTHAW
2974 sys_siglist[SIGTHAW] = "SIGTHAW";
2975 # endif
2976 # ifdef SIGTRAP
2977 sys_siglist[SIGTRAP] = "Trace/breakpoint trap";
2978 # endif
2979 # ifdef SIGTSTP
2980 sys_siglist[SIGTSTP] = "Stopped (user)";
2981 # endif
2982 # ifdef SIGTTIN
2983 sys_siglist[SIGTTIN] = "Stopped (tty input)";
2984 # endif
2985 # ifdef SIGTTOU
2986 sys_siglist[SIGTTOU] = "Stopped (tty output)";
2987 # endif
2988 # ifdef SIGURG
2989 sys_siglist[SIGURG] = "Urgent I/O condition";
2990 # endif
2991 # ifdef SIGUSR1
2992 sys_siglist[SIGUSR1] = "User defined signal 1";
2993 # endif
2994 # ifdef SIGUSR2
2995 sys_siglist[SIGUSR2] = "User defined signal 2";
2996 # endif
2997 # ifdef SIGVTALRM
2998 sys_siglist[SIGVTALRM] = "Virtual timer expired";
2999 # endif
3000 # ifdef SIGWAITING
3001 sys_siglist[SIGWAITING] = "Process's LWPs are blocked";
3002 # endif
3003 # ifdef SIGWINCH
3004 sys_siglist[SIGWINCH] = "Window size changed";
3005 # endif
3006 # ifdef SIGWIND
3007 sys_siglist[SIGWIND] = "SIGWIND";
3008 # endif
3009 # ifdef SIGXCPU
3010 sys_siglist[SIGXCPU] = "CPU time limit exceeded";
3011 # endif
3012 # ifdef SIGXFSZ
3013 sys_siglist[SIGXFSZ] = "File size limit exceeded";
3014 # endif
3015 }
3016 #endif /* !defined HAVE_STRSIGNAL && !defined SYS_SIGLIST_DECLARED */
3017 }
3018 \f
3019 #ifndef HAVE_RANDOM
3020 #ifdef random
3021 #define HAVE_RANDOM
3022 #endif
3023 #endif
3024
3025 /* Figure out how many bits the system's random number generator uses.
3026 `random' and `lrand48' are assumed to return 31 usable bits.
3027 BSD `rand' returns a 31 bit value but the low order bits are unusable;
3028 so we'll shift it and treat it like the 15-bit USG `rand'. */
3029
3030 #ifndef RAND_BITS
3031 # ifdef HAVE_RANDOM
3032 # define RAND_BITS 31
3033 # else /* !HAVE_RANDOM */
3034 # ifdef HAVE_LRAND48
3035 # define RAND_BITS 31
3036 # define random lrand48
3037 # else /* !HAVE_LRAND48 */
3038 # define RAND_BITS 15
3039 # if RAND_MAX == 32767
3040 # define random rand
3041 # else /* RAND_MAX != 32767 */
3042 # if RAND_MAX == 2147483647
3043 # define random() (rand () >> 16)
3044 # else /* RAND_MAX != 2147483647 */
3045 # ifdef USG
3046 # define random rand
3047 # else
3048 # define random() (rand () >> 16)
3049 # endif /* !USG */
3050 # endif /* RAND_MAX != 2147483647 */
3051 # endif /* RAND_MAX != 32767 */
3052 # endif /* !HAVE_LRAND48 */
3053 # endif /* !HAVE_RANDOM */
3054 #endif /* !RAND_BITS */
3055
3056 void
3057 seed_random (arg)
3058 long arg;
3059 {
3060 #ifdef HAVE_RANDOM
3061 srandom ((unsigned int)arg);
3062 #else
3063 # ifdef HAVE_LRAND48
3064 srand48 (arg);
3065 # else
3066 srand ((unsigned int)arg);
3067 # endif
3068 #endif
3069 }
3070
3071 /*
3072 * Build a full Emacs-sized word out of whatever we've got.
3073 * This suffices even for a 64-bit architecture with a 15-bit rand.
3074 */
3075 long
3076 get_random ()
3077 {
3078 long val = random ();
3079 #if VALBITS > RAND_BITS
3080 val = (val << RAND_BITS) ^ random ();
3081 #if VALBITS > 2*RAND_BITS
3082 val = (val << RAND_BITS) ^ random ();
3083 #if VALBITS > 3*RAND_BITS
3084 val = (val << RAND_BITS) ^ random ();
3085 #if VALBITS > 4*RAND_BITS
3086 val = (val << RAND_BITS) ^ random ();
3087 #endif /* need at least 5 */
3088 #endif /* need at least 4 */
3089 #endif /* need at least 3 */
3090 #endif /* need at least 2 */
3091 return val & ((1L << VALBITS) - 1);
3092 }
3093 \f
3094 #ifdef WRONG_NAME_INSQUE
3095
3096 insque (q,p)
3097 caddr_t q,p;
3098 {
3099 _insque (q,p);
3100 }
3101
3102 #endif
3103 \f
3104 #ifdef VMS
3105
3106 #ifdef getenv
3107 /* If any place else asks for the TERM variable,
3108 allow it to be overridden with the EMACS_TERM variable
3109 before attempting to translate the logical name TERM. As a last
3110 resort, ask for VAX C's special idea of the TERM variable. */
3111 #undef getenv
3112 char *
3113 sys_getenv (name)
3114 char *name;
3115 {
3116 register char *val;
3117 static char buf[256];
3118 static struct dsc$descriptor_s equiv
3119 = {sizeof (buf), DSC$K_DTYPE_T, DSC$K_CLASS_S, buf};
3120 static struct dsc$descriptor_s d_name
3121 = {0, DSC$K_DTYPE_T, DSC$K_CLASS_S, 0};
3122 short eqlen;
3123
3124 if (!strcmp (name, "TERM"))
3125 {
3126 val = (char *) getenv ("EMACS_TERM");
3127 if (val)
3128 return val;
3129 }
3130
3131 d_name.dsc$w_length = strlen (name);
3132 d_name.dsc$a_pointer = name;
3133 if (LIB$SYS_TRNLOG (&d_name, &eqlen, &equiv) == 1)
3134 {
3135 char *str = (char *) xmalloc (eqlen + 1);
3136 bcopy (buf, str, eqlen);
3137 str[eqlen] = '\0';
3138 /* This is a storage leak, but a pain to fix. With luck,
3139 no one will ever notice. */
3140 return str;
3141 }
3142 return (char *) getenv (name);
3143 }
3144 #endif /* getenv */
3145
3146 #ifdef abort
3147 /* Since VMS doesn't believe in core dumps, the only way to debug this beast is
3148 to force a call on the debugger from within the image. */
3149 #undef abort
3150 sys_abort ()
3151 {
3152 reset_sys_modes ();
3153 LIB$SIGNAL (SS$_DEBUG);
3154 }
3155 #endif /* abort */
3156 #endif /* VMS */
3157 \f
3158 #ifdef VMS
3159 #ifdef LINK_CRTL_SHARE
3160 #ifdef SHARABLE_LIB_BUG
3161 /* Variables declared noshare and initialized in sharable libraries
3162 cannot be shared. The VMS linker incorrectly forces you to use a private
3163 version which is uninitialized... If not for this "feature", we
3164 could use the C library definition of sys_nerr and sys_errlist. */
3165 int sys_nerr = 35;
3166 char *sys_errlist[] =
3167 {
3168 "error 0",
3169 "not owner",
3170 "no such file or directory",
3171 "no such process",
3172 "interrupted system call",
3173 "i/o error",
3174 "no such device or address",
3175 "argument list too long",
3176 "exec format error",
3177 "bad file number",
3178 "no child process",
3179 "no more processes",
3180 "not enough memory",
3181 "permission denied",
3182 "bad address",
3183 "block device required",
3184 "mount devices busy",
3185 "file exists",
3186 "cross-device link",
3187 "no such device",
3188 "not a directory",
3189 "is a directory",
3190 "invalid argument",
3191 "file table overflow",
3192 "too many open files",
3193 "not a typewriter",
3194 "text file busy",
3195 "file too big",
3196 "no space left on device",
3197 "illegal seek",
3198 "read-only file system",
3199 "too many links",
3200 "broken pipe",
3201 "math argument",
3202 "result too large",
3203 "I/O stream empty",
3204 "vax/vms specific error code nontranslatable error"
3205 };
3206 #endif /* SHARABLE_LIB_BUG */
3207 #endif /* LINK_CRTL_SHARE */
3208 #endif /* VMS */
3209
3210 #ifndef HAVE_STRERROR
3211 #ifndef WINDOWSNT
3212 char *
3213 strerror (errnum)
3214 int errnum;
3215 {
3216 extern char *sys_errlist[];
3217 extern int sys_nerr;
3218
3219 if (errnum >= 0 && errnum < sys_nerr)
3220 return sys_errlist[errnum];
3221 return (char *) "Unknown error";
3222 }
3223 #endif /* not WINDOWSNT */
3224 #endif /* ! HAVE_STRERROR */
3225 \f
3226 int
3227 emacs_open (path, oflag, mode)
3228 const char *path;
3229 int oflag, mode;
3230 {
3231 register int rtnval;
3232
3233 #ifdef BSD4_1
3234 if (oflag & O_CREAT)
3235 return creat (path, mode);
3236 #endif
3237
3238 while ((rtnval = open (path, oflag, mode)) == -1
3239 && (errno == EINTR));
3240 return (rtnval);
3241 }
3242
3243 int
3244 emacs_close (fd)
3245 int fd;
3246 {
3247 int did_retry = 0;
3248 register int rtnval;
3249
3250 while ((rtnval = close (fd)) == -1
3251 && (errno == EINTR))
3252 did_retry = 1;
3253
3254 /* If close is interrupted SunOS 4.1 may or may not have closed the
3255 file descriptor. If it did the second close will fail with
3256 errno = EBADF. That means we have succeeded. */
3257 if (rtnval == -1 && did_retry && errno == EBADF)
3258 return 0;
3259
3260 return rtnval;
3261 }
3262
3263 int
3264 emacs_read (fildes, buf, nbyte)
3265 int fildes;
3266 char *buf;
3267 unsigned int nbyte;
3268 {
3269 register int rtnval;
3270
3271 while ((rtnval = read (fildes, buf, nbyte)) == -1
3272 && (errno == EINTR));
3273 return (rtnval);
3274 }
3275
3276 int
3277 emacs_write (fildes, buf, nbyte)
3278 int fildes;
3279 const char *buf;
3280 unsigned int nbyte;
3281 {
3282 register int rtnval, bytes_written;
3283
3284 bytes_written = 0;
3285
3286 while (nbyte > 0)
3287 {
3288 rtnval = write (fildes, buf, nbyte);
3289
3290 if (rtnval == -1)
3291 {
3292 if (errno == EINTR)
3293 continue;
3294 else
3295 return (bytes_written ? bytes_written : -1);
3296 }
3297
3298 buf += rtnval;
3299 nbyte -= rtnval;
3300 bytes_written += rtnval;
3301 }
3302 return (bytes_written);
3303 }
3304 \f
3305 #ifdef USG
3306 /*
3307 * All of the following are for USG.
3308 *
3309 * On USG systems the system calls are INTERRUPTIBLE by signals
3310 * that the user program has elected to catch. Thus the system call
3311 * must be retried in these cases. To handle this without massive
3312 * changes in the source code, we remap the standard system call names
3313 * to names for our own functions in sysdep.c that do the system call
3314 * with retries. Actually, for portability reasons, it is good
3315 * programming practice, as this example shows, to limit all actual
3316 * system calls to a single occurrence in the source. Sure, this
3317 * adds an extra level of function call overhead but it is almost
3318 * always negligible. Fred Fish, Unisoft Systems Inc.
3319 */
3320
3321 /*
3322 * Warning, this function may not duplicate 4.2 action properly
3323 * under error conditions.
3324 */
3325
3326 #ifndef MAXPATHLEN
3327 /* In 4.1, param.h fails to define this. */
3328 #define MAXPATHLEN 1024
3329 #endif
3330
3331 #ifndef HAVE_GETWD
3332
3333 char *
3334 getwd (pathname)
3335 char *pathname;
3336 {
3337 char *npath, *spath;
3338 extern char *getcwd ();
3339
3340 BLOCK_INPUT; /* getcwd uses malloc */
3341 spath = npath = getcwd ((char *) 0, MAXPATHLEN);
3342 if (spath == 0)
3343 {
3344 UNBLOCK_INPUT;
3345 return spath;
3346 }
3347 /* On Altos 3068, getcwd can return @hostname/dir, so discard
3348 up to first slash. Should be harmless on other systems. */
3349 while (*npath && *npath != '/')
3350 npath++;
3351 strcpy (pathname, npath);
3352 free (spath); /* getcwd uses malloc */
3353 UNBLOCK_INPUT;
3354 return pathname;
3355 }
3356
3357 #endif /* HAVE_GETWD */
3358
3359 /*
3360 * Emulate rename using unlink/link. Note that this is
3361 * only partially correct. Also, doesn't enforce restriction
3362 * that files be of same type (regular->regular, dir->dir, etc).
3363 */
3364
3365 #ifndef HAVE_RENAME
3366
3367 rename (from, to)
3368 const char *from;
3369 const char *to;
3370 {
3371 if (access (from, 0) == 0)
3372 {
3373 unlink (to);
3374 if (link (from, to) == 0)
3375 if (unlink (from) == 0)
3376 return (0);
3377 }
3378 return (-1);
3379 }
3380
3381 #endif
3382
3383
3384 #ifdef HPUX
3385 #ifndef HAVE_PERROR
3386
3387 /* HPUX curses library references perror, but as far as we know
3388 it won't be called. Anyway this definition will do for now. */
3389
3390 perror ()
3391 {
3392 }
3393
3394 #endif /* not HAVE_PERROR */
3395 #endif /* HPUX */
3396
3397 #ifndef HAVE_DUP2
3398
3399 /*
3400 * Emulate BSD dup2. First close newd if it already exists.
3401 * Then, attempt to dup oldd. If not successful, call dup2 recursively
3402 * until we are, then close the unsuccessful ones.
3403 */
3404
3405 dup2 (oldd, newd)
3406 int oldd;
3407 int newd;
3408 {
3409 register int fd, ret;
3410
3411 emacs_close (newd);
3412
3413 #ifdef F_DUPFD
3414 return fcntl (oldd, F_DUPFD, newd);
3415 #else
3416 fd = dup (old);
3417 if (fd == -1)
3418 return -1;
3419 if (fd == new)
3420 return new;
3421 ret = dup2 (old,new);
3422 emacs_close (fd);
3423 return ret;
3424 #endif
3425 }
3426
3427 #endif /* not HAVE_DUP2 */
3428
3429 /*
3430 * Gettimeofday. Simulate as much as possible. Only accurate
3431 * to nearest second. Emacs doesn't use tzp so ignore it for now.
3432 * Only needed when subprocesses are defined.
3433 */
3434
3435 #ifdef subprocesses
3436 #ifndef VMS
3437 #ifndef HAVE_GETTIMEOFDAY
3438 #ifdef HAVE_TIMEVAL
3439
3440 /* ARGSUSED */
3441 int
3442 gettimeofday (tp, tzp)
3443 struct timeval *tp;
3444 struct timezone *tzp;
3445 {
3446 extern long time ();
3447
3448 tp->tv_sec = time ((long *)0);
3449 tp->tv_usec = 0;
3450 if (tzp != 0)
3451 tzp->tz_minuteswest = -1;
3452 return 0;
3453 }
3454
3455 #endif
3456 #endif
3457 #endif
3458 #endif /* subprocess && !HAVE_GETTIMEOFDAY && HAVE_TIMEVAL && !VMS */
3459
3460 /*
3461 * This function will go away as soon as all the stubs fixed. (fnf)
3462 */
3463
3464 void
3465 croak (badfunc)
3466 char *badfunc;
3467 {
3468 printf ("%s not yet implemented\r\n", badfunc);
3469 reset_sys_modes ();
3470 exit (1);
3471 }
3472
3473 #endif /* USG */
3474 \f
3475 /* Directory routines for systems that don't have them. */
3476
3477 #ifdef SYSV_SYSTEM_DIR
3478
3479 #include <dirent.h>
3480
3481 #if defined (BROKEN_CLOSEDIR) || !defined (HAVE_CLOSEDIR)
3482
3483 int
3484 closedir (dirp)
3485 register DIR *dirp; /* stream from opendir */
3486 {
3487 int rtnval;
3488
3489 rtnval = emacs_close (dirp->dd_fd);
3490
3491 /* Some systems (like Solaris) allocate the buffer and the DIR all
3492 in one block. Why in the world are we freeing this ourselves
3493 anyway? */
3494 #if ! (defined (sun) && defined (USG5_4))
3495 xfree ((char *) dirp->dd_buf); /* directory block defined in <dirent.h> */
3496 #endif
3497 xfree ((char *) dirp);
3498
3499 return rtnval;
3500 }
3501 #endif /* BROKEN_CLOSEDIR or not HAVE_CLOSEDIR */
3502 #endif /* SYSV_SYSTEM_DIR */
3503
3504 #ifdef NONSYSTEM_DIR_LIBRARY
3505
3506 DIR *
3507 opendir (filename)
3508 char *filename; /* name of directory */
3509 {
3510 register DIR *dirp; /* -> malloc'ed storage */
3511 register int fd; /* file descriptor for read */
3512 struct stat sbuf; /* result of fstat */
3513
3514 fd = emacs_open (filename, O_RDONLY, 0);
3515 if (fd < 0)
3516 return 0;
3517
3518 BLOCK_INPUT;
3519 if (fstat (fd, &sbuf) < 0
3520 || (sbuf.st_mode & S_IFMT) != S_IFDIR
3521 || (dirp = (DIR *) xmalloc (sizeof (DIR))) == 0)
3522 {
3523 emacs_close (fd);
3524 UNBLOCK_INPUT;
3525 return 0; /* bad luck today */
3526 }
3527 UNBLOCK_INPUT;
3528
3529 dirp->dd_fd = fd;
3530 dirp->dd_loc = dirp->dd_size = 0; /* refill needed */
3531
3532 return dirp;
3533 }
3534
3535 void
3536 closedir (dirp)
3537 register DIR *dirp; /* stream from opendir */
3538 {
3539 emacs_close (dirp->dd_fd);
3540 xfree ((char *) dirp);
3541 }
3542
3543
3544 #ifndef VMS
3545 #define DIRSIZ 14
3546 struct olddir
3547 {
3548 ino_t od_ino; /* inode */
3549 char od_name[DIRSIZ]; /* filename */
3550 };
3551 #endif /* not VMS */
3552
3553 struct direct dir_static; /* simulated directory contents */
3554
3555 /* ARGUSED */
3556 struct direct *
3557 readdir (dirp)
3558 register DIR *dirp; /* stream from opendir */
3559 {
3560 #ifndef VMS
3561 register struct olddir *dp; /* -> directory data */
3562 #else /* VMS */
3563 register struct dir$_name *dp; /* -> directory data */
3564 register struct dir$_version *dv; /* -> version data */
3565 #endif /* VMS */
3566
3567 for (; ;)
3568 {
3569 if (dirp->dd_loc >= dirp->dd_size)
3570 dirp->dd_loc = dirp->dd_size = 0;
3571
3572 if (dirp->dd_size == 0 /* refill buffer */
3573 && (dirp->dd_size = emacs_read (dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ)) <= 0)
3574 return 0;
3575
3576 #ifndef VMS
3577 dp = (struct olddir *) &dirp->dd_buf[dirp->dd_loc];
3578 dirp->dd_loc += sizeof (struct olddir);
3579
3580 if (dp->od_ino != 0) /* not deleted entry */
3581 {
3582 dir_static.d_ino = dp->od_ino;
3583 strncpy (dir_static.d_name, dp->od_name, DIRSIZ);
3584 dir_static.d_name[DIRSIZ] = '\0';
3585 dir_static.d_namlen = strlen (dir_static.d_name);
3586 dir_static.d_reclen = sizeof (struct direct)
3587 - MAXNAMLEN + 3
3588 + dir_static.d_namlen - dir_static.d_namlen % 4;
3589 return &dir_static; /* -> simulated structure */
3590 }
3591 #else /* VMS */
3592 dp = (struct dir$_name *) dirp->dd_buf;
3593 if (dirp->dd_loc == 0)
3594 dirp->dd_loc = (dp->dir$b_namecount&1) ? dp->dir$b_namecount + 1
3595 : dp->dir$b_namecount;
3596 dv = (struct dir$_version *)&dp->dir$t_name[dirp->dd_loc];
3597 dir_static.d_ino = dv->dir$w_fid_num;
3598 dir_static.d_namlen = dp->dir$b_namecount;
3599 dir_static.d_reclen = sizeof (struct direct)
3600 - MAXNAMLEN + 3
3601 + dir_static.d_namlen - dir_static.d_namlen % 4;
3602 strncpy (dir_static.d_name, dp->dir$t_name, dp->dir$b_namecount);
3603 dir_static.d_name[dir_static.d_namlen] = '\0';
3604 dirp->dd_loc = dirp->dd_size; /* only one record at a time */
3605 return &dir_static;
3606 #endif /* VMS */
3607 }
3608 }
3609
3610 #ifdef VMS
3611 /* readdirver is just like readdir except it returns all versions of a file
3612 as separate entries. */
3613
3614 /* ARGUSED */
3615 struct direct *
3616 readdirver (dirp)
3617 register DIR *dirp; /* stream from opendir */
3618 {
3619 register struct dir$_name *dp; /* -> directory data */
3620 register struct dir$_version *dv; /* -> version data */
3621
3622 if (dirp->dd_loc >= dirp->dd_size - sizeof (struct dir$_name))
3623 dirp->dd_loc = dirp->dd_size = 0;
3624
3625 if (dirp->dd_size == 0 /* refill buffer */
3626 && (dirp->dd_size = sys_read (dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ)) <= 0)
3627 return 0;
3628
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 strncpy (dir_static.d_name, dp->dir$t_name, dp->dir$b_namecount);
3635 sprintf (&dir_static.d_name[dp->dir$b_namecount], ";%d", dv->dir$w_version);
3636 dir_static.d_namlen = strlen (dir_static.d_name);
3637 dir_static.d_ino = dv->dir$w_fid_num;
3638 dir_static.d_reclen = sizeof (struct direct) - MAXNAMLEN + 3
3639 + dir_static.d_namlen - dir_static.d_namlen % 4;
3640 dirp->dd_loc = ((char *) (++dv) - dp->dir$t_name);
3641 return &dir_static;
3642 }
3643
3644 #endif /* VMS */
3645
3646 #endif /* NONSYSTEM_DIR_LIBRARY */
3647
3648 \f
3649 int
3650 set_file_times (filename, atime, mtime)
3651 const char *filename;
3652 EMACS_TIME atime, mtime;
3653 {
3654 #ifdef HAVE_UTIMES
3655 struct timeval tv[2];
3656 tv[0] = atime;
3657 tv[1] = mtime;
3658 return utimes (filename, tv);
3659 #else /* not HAVE_UTIMES */
3660 struct utimbuf utb;
3661 utb.actime = EMACS_SECS (atime);
3662 utb.modtime = EMACS_SECS (mtime);
3663 return utime (filename, &utb);
3664 #endif /* not HAVE_UTIMES */
3665 }
3666 \f
3667 /* mkdir and rmdir functions, for systems which don't have them. */
3668
3669 #ifndef HAVE_MKDIR
3670 /*
3671 * Written by Robert Rother, Mariah Corporation, August 1985.
3672 *
3673 * If you want it, it's yours. All I ask in return is that if you
3674 * figure out how to do this in a Bourne Shell script you send me
3675 * a copy.
3676 * sdcsvax!rmr or rmr@uscd
3677 *
3678 * Severely hacked over by John Gilmore to make a 4.2BSD compatible
3679 * subroutine. 11Mar86; hoptoad!gnu
3680 *
3681 * Modified by rmtodd@uokmax 6-28-87 -- when making an already existing dir,
3682 * subroutine didn't return EEXIST. It does now.
3683 */
3684
3685 /*
3686 * Make a directory.
3687 */
3688 #ifdef MKDIR_PROTOTYPE
3689 MKDIR_PROTOTYPE
3690 #else
3691 int
3692 mkdir (dpath, dmode)
3693 char *dpath;
3694 int dmode;
3695 #endif
3696 {
3697 int cpid, status, fd;
3698 struct stat statbuf;
3699
3700 if (stat (dpath, &statbuf) == 0)
3701 {
3702 errno = EEXIST; /* Stat worked, so it already exists */
3703 return -1;
3704 }
3705
3706 /* If stat fails for a reason other than non-existence, return error */
3707 if (errno != ENOENT)
3708 return -1;
3709
3710 synch_process_alive = 1;
3711 switch (cpid = fork ())
3712 {
3713
3714 case -1: /* Error in fork */
3715 return (-1); /* Errno is set already */
3716
3717 case 0: /* Child process */
3718 /*
3719 * Cheap hack to set mode of new directory. Since this
3720 * child process is going away anyway, we zap its umask.
3721 * FIXME, this won't suffice to set SUID, SGID, etc. on this
3722 * directory. Does anybody care?
3723 */
3724 status = umask (0); /* Get current umask */
3725 status = umask (status | (0777 & ~dmode)); /* Set for mkdir */
3726 fd = emacs_open ("/dev/null", O_RDWR, 0);
3727 if (fd >= 0)
3728 {
3729 dup2 (fd, 0);
3730 dup2 (fd, 1);
3731 dup2 (fd, 2);
3732 }
3733 execl ("/bin/mkdir", "mkdir", dpath, (char *) 0);
3734 _exit (-1); /* Can't exec /bin/mkdir */
3735
3736 default: /* Parent process */
3737 wait_for_termination (cpid);
3738 }
3739
3740 if (synch_process_death != 0 || synch_process_retcode != 0)
3741 {
3742 errno = EIO; /* We don't know why, but */
3743 return -1; /* /bin/mkdir failed */
3744 }
3745
3746 return 0;
3747 }
3748 #endif /* not HAVE_MKDIR */
3749
3750 #ifndef HAVE_RMDIR
3751 int
3752 rmdir (dpath)
3753 char *dpath;
3754 {
3755 int cpid, status, fd;
3756 struct stat statbuf;
3757
3758 if (stat (dpath, &statbuf) != 0)
3759 {
3760 /* Stat just set errno. We don't have to */
3761 return -1;
3762 }
3763
3764 synch_process_alive = 1;
3765 switch (cpid = fork ())
3766 {
3767
3768 case -1: /* Error in fork */
3769 return (-1); /* Errno is set already */
3770
3771 case 0: /* Child process */
3772 fd = emacs_open ("/dev/null", O_RDWR, 0);
3773 if (fd >= 0)
3774 {
3775 dup2 (fd, 0);
3776 dup2 (fd, 1);
3777 dup2 (fd, 2);
3778 }
3779 execl ("/bin/rmdir", "rmdir", dpath, (char *) 0);
3780 _exit (-1); /* Can't exec /bin/rmdir */
3781
3782 default: /* Parent process */
3783 wait_for_termination (cpid);
3784 }
3785
3786 if (synch_process_death != 0 || synch_process_retcode != 0)
3787 {
3788 errno = EIO; /* We don't know why, but */
3789 return -1; /* /bin/rmdir failed */
3790 }
3791
3792 return 0;
3793 }
3794 #endif /* !HAVE_RMDIR */
3795
3796
3797 \f
3798 /* Functions for VMS */
3799 #ifdef VMS
3800 #include "vms-pwd.h"
3801 #include <acldef.h>
3802 #include <chpdef.h>
3803 #include <jpidef.h>
3804
3805 /* Return as a string the VMS error string pertaining to STATUS.
3806 Reuses the same static buffer each time it is called. */
3807
3808 char *
3809 vmserrstr (status)
3810 int status; /* VMS status code */
3811 {
3812 int bufadr[2];
3813 short len;
3814 static char buf[257];
3815
3816 bufadr[0] = sizeof buf - 1;
3817 bufadr[1] = (int) buf;
3818 if (! (SYS$GETMSG (status, &len, bufadr, 0x1, 0) & 1))
3819 return "untranslatable VMS error status";
3820 buf[len] = '\0';
3821 return buf;
3822 }
3823
3824 #ifdef access
3825 #undef access
3826
3827 /* The following is necessary because 'access' emulation by VMS C (2.0) does
3828 * not work correctly. (It also doesn't work well in version 2.3.)
3829 */
3830
3831 #ifdef VMS4_4
3832
3833 #define DESCRIPTOR(name,string) struct dsc$descriptor_s name = \
3834 { strlen (string), DSC$K_DTYPE_T, DSC$K_CLASS_S, string }
3835
3836 typedef union {
3837 struct {
3838 unsigned short s_buflen;
3839 unsigned short s_code;
3840 char *s_bufadr;
3841 unsigned short *s_retlenadr;
3842 } s;
3843 int end;
3844 } item;
3845 #define buflen s.s_buflen
3846 #define code s.s_code
3847 #define bufadr s.s_bufadr
3848 #define retlenadr s.s_retlenadr
3849
3850 #define R_OK 4 /* test for read permission */
3851 #define W_OK 2 /* test for write permission */
3852 #define X_OK 1 /* test for execute (search) permission */
3853 #define F_OK 0 /* test for presence of file */
3854
3855 int
3856 sys_access (path, mode)
3857 char *path;
3858 int mode;
3859 {
3860 static char *user = NULL;
3861 char dir_fn[512];
3862
3863 /* translate possible directory spec into .DIR file name, so brain-dead
3864 * access can treat the directory like a file. */
3865 if (directory_file_name (path, dir_fn))
3866 path = dir_fn;
3867
3868 if (mode == F_OK)
3869 return access (path, mode);
3870 if (user == NULL && (user = (char *) getenv ("USER")) == NULL)
3871 return -1;
3872 {
3873 int stat;
3874 int flags;
3875 int acces;
3876 unsigned short int dummy;
3877 item itemlst[3];
3878 static int constant = ACL$C_FILE;
3879 DESCRIPTOR (path_desc, path);
3880 DESCRIPTOR (user_desc, user);
3881
3882 flags = 0;
3883 acces = 0;
3884 if ((mode & X_OK) && ((stat = access (path, mode)) < 0 || mode == X_OK))
3885 return stat;
3886 if (mode & R_OK)
3887 acces |= CHP$M_READ;
3888 if (mode & W_OK)
3889 acces |= CHP$M_WRITE;
3890 itemlst[0].buflen = sizeof (int);
3891 itemlst[0].code = CHP$_FLAGS;
3892 itemlst[0].bufadr = (char *) &flags;
3893 itemlst[0].retlenadr = &dummy;
3894 itemlst[1].buflen = sizeof (int);
3895 itemlst[1].code = CHP$_ACCESS;
3896 itemlst[1].bufadr = (char *) &acces;
3897 itemlst[1].retlenadr = &dummy;
3898 itemlst[2].end = CHP$_END;
3899 stat = SYS$CHECK_ACCESS (&constant, &path_desc, &user_desc, itemlst);
3900 return stat == SS$_NORMAL ? 0 : -1;
3901 }
3902 }
3903
3904 #else /* not VMS4_4 */
3905
3906 #include <prvdef.h>
3907 #define ACE$M_WRITE 2
3908 #define ACE$C_KEYID 1
3909
3910 static unsigned short memid, grpid;
3911 static unsigned int uic;
3912
3913 /* Called from init_sys_modes, so it happens not very often
3914 but at least each time Emacs is loaded. */
3915 void
3916 sys_access_reinit ()
3917 {
3918 uic = 0;
3919 }
3920
3921 int
3922 sys_access (filename, type)
3923 char * filename;
3924 int type;
3925 {
3926 struct FAB fab;
3927 struct XABPRO xab;
3928 int status, size, i, typecode, acl_controlled;
3929 unsigned int *aclptr, *aclend, aclbuf[60];
3930 union prvdef prvmask;
3931
3932 /* Get UIC and GRP values for protection checking. */
3933 if (uic == 0)
3934 {
3935 status = LIB$GETJPI (&JPI$_UIC, 0, 0, &uic, 0, 0);
3936 if (! (status & 1))
3937 return -1;
3938 memid = uic & 0xFFFF;
3939 grpid = uic >> 16;
3940 }
3941
3942 if (type != 2) /* not checking write access */
3943 return access (filename, type);
3944
3945 /* Check write protection. */
3946
3947 #define CHECKPRIV(bit) (prvmask.bit)
3948 #define WRITABLE(field) (! ((xab.xab$w_pro >> field) & XAB$M_NOWRITE))
3949
3950 /* Find privilege bits */
3951 status = SYS$SETPRV (0, 0, 0, prvmask);
3952 if (! (status & 1))
3953 error ("Unable to find privileges: %s", vmserrstr (status));
3954 if (CHECKPRIV (PRV$V_BYPASS))
3955 return 0; /* BYPASS enabled */
3956 fab = cc$rms_fab;
3957 fab.fab$b_fac = FAB$M_GET;
3958 fab.fab$l_fna = filename;
3959 fab.fab$b_fns = strlen (filename);
3960 fab.fab$l_xab = &xab;
3961 xab = cc$rms_xabpro;
3962 xab.xab$l_aclbuf = aclbuf;
3963 xab.xab$w_aclsiz = sizeof (aclbuf);
3964 status = SYS$OPEN (&fab, 0, 0);
3965 if (! (status & 1))
3966 return -1;
3967 SYS$CLOSE (&fab, 0, 0);
3968 /* Check system access */
3969 if (CHECKPRIV (PRV$V_SYSPRV) && WRITABLE (XAB$V_SYS))
3970 return 0;
3971 /* Check ACL entries, if any */
3972 acl_controlled = 0;
3973 if (xab.xab$w_acllen > 0)
3974 {
3975 aclptr = aclbuf;
3976 aclend = &aclbuf[xab.xab$w_acllen / 4];
3977 while (*aclptr && aclptr < aclend)
3978 {
3979 size = (*aclptr & 0xff) / 4;
3980 typecode = (*aclptr >> 8) & 0xff;
3981 if (typecode == ACE$C_KEYID)
3982 for (i = size - 1; i > 1; i--)
3983 if (aclptr[i] == uic)
3984 {
3985 acl_controlled = 1;
3986 if (aclptr[1] & ACE$M_WRITE)
3987 return 0; /* Write access through ACL */
3988 }
3989 aclptr = &aclptr[size];
3990 }
3991 if (acl_controlled) /* ACL specified, prohibits write access */
3992 return -1;
3993 }
3994 /* No ACL entries specified, check normal protection */
3995 if (WRITABLE (XAB$V_WLD)) /* World writable */
3996 return 0;
3997 if (WRITABLE (XAB$V_GRP) &&
3998 (unsigned short) (xab.xab$l_uic >> 16) == grpid)
3999 return 0; /* Group writable */
4000 if (WRITABLE (XAB$V_OWN) &&
4001 (xab.xab$l_uic & 0xFFFF) == memid)
4002 return 0; /* Owner writable */
4003
4004 return -1; /* Not writable */
4005 }
4006 #endif /* not VMS4_4 */
4007 #endif /* access */
4008
4009 static char vtbuf[NAM$C_MAXRSS+1];
4010
4011 /* translate a vms file spec to a unix path */
4012 char *
4013 sys_translate_vms (vfile)
4014 char * vfile;
4015 {
4016 char * p;
4017 char * targ;
4018
4019 if (!vfile)
4020 return 0;
4021
4022 targ = vtbuf;
4023
4024 /* leading device or logical name is a root directory */
4025 if (p = strchr (vfile, ':'))
4026 {
4027 *targ++ = '/';
4028 while (vfile < p)
4029 *targ++ = *vfile++;
4030 vfile++;
4031 *targ++ = '/';
4032 }
4033 p = vfile;
4034 if (*p == '[' || *p == '<')
4035 {
4036 while (*++vfile != *p + 2)
4037 switch (*vfile)
4038 {
4039 case '.':
4040 if (vfile[-1] == *p)
4041 *targ++ = '.';
4042 *targ++ = '/';
4043 break;
4044
4045 case '-':
4046 *targ++ = '.';
4047 *targ++ = '.';
4048 break;
4049
4050 default:
4051 *targ++ = *vfile;
4052 break;
4053 }
4054 vfile++;
4055 *targ++ = '/';
4056 }
4057 while (*vfile)
4058 *targ++ = *vfile++;
4059
4060 return vtbuf;
4061 }
4062
4063 static char utbuf[NAM$C_MAXRSS+1];
4064
4065 /* translate a unix path to a VMS file spec */
4066 char *
4067 sys_translate_unix (ufile)
4068 char * ufile;
4069 {
4070 int slash_seen = 0;
4071 char *p;
4072 char * targ;
4073
4074 if (!ufile)
4075 return 0;
4076
4077 targ = utbuf;
4078
4079 if (*ufile == '/')
4080 {
4081 ufile++;
4082 }
4083
4084 while (*ufile)
4085 {
4086 switch (*ufile)
4087 {
4088 case '/':
4089 if (slash_seen)
4090 if (index (&ufile[1], '/'))
4091 *targ++ = '.';
4092 else
4093 *targ++ = ']';
4094 else
4095 {
4096 *targ++ = ':';
4097 if (index (&ufile[1], '/'))
4098 *targ++ = '[';
4099 slash_seen = 1;
4100 }
4101 break;
4102
4103 case '.':
4104 if (strncmp (ufile, "./", 2) == 0)
4105 {
4106 if (!slash_seen)
4107 {
4108 *targ++ = '[';
4109 slash_seen = 1;
4110 }
4111 ufile++; /* skip the dot */
4112 if (index (&ufile[1], '/'))
4113 *targ++ = '.';
4114 else
4115 *targ++ = ']';
4116 }
4117 else if (strncmp (ufile, "../", 3) == 0)
4118 {
4119 if (!slash_seen)
4120 {
4121 *targ++ = '[';
4122 slash_seen = 1;
4123 }
4124 *targ++ = '-';
4125 ufile += 2; /* skip the dots */
4126 if (index (&ufile[1], '/'))
4127 *targ++ = '.';
4128 else
4129 *targ++ = ']';
4130 }
4131 else
4132 *targ++ = *ufile;
4133 break;
4134
4135 default:
4136 *targ++ = *ufile;
4137 break;
4138 }
4139 ufile++;
4140 }
4141 *targ = '\0';
4142
4143 return utbuf;
4144 }
4145
4146 char *
4147 getwd (pathname)
4148 char *pathname;
4149 {
4150 char *ptr, *val;
4151 extern char *getcwd ();
4152
4153 #define MAXPATHLEN 1024
4154
4155 ptr = xmalloc (MAXPATHLEN);
4156 val = getcwd (ptr, MAXPATHLEN);
4157 if (val == 0)
4158 {
4159 xfree (ptr);
4160 return val;
4161 }
4162 strcpy (pathname, ptr);
4163 xfree (ptr);
4164
4165 return pathname;
4166 }
4167
4168 int
4169 getppid ()
4170 {
4171 long item_code = JPI$_OWNER;
4172 unsigned long parent_id;
4173 int status;
4174
4175 if (((status = LIB$GETJPI (&item_code, 0, 0, &parent_id)) & 1) == 0)
4176 {
4177 errno = EVMSERR;
4178 vaxc$errno = status;
4179 return -1;
4180 }
4181 return parent_id;
4182 }
4183
4184 #undef getuid
4185 unsigned
4186 sys_getuid ()
4187 {
4188 return (getgid () << 16) | getuid ();
4189 }
4190
4191 #undef read
4192 int
4193 sys_read (fildes, buf, nbyte)
4194 int fildes;
4195 char *buf;
4196 unsigned int nbyte;
4197 {
4198 return read (fildes, buf, (nbyte < MAXIOSIZE ? nbyte : MAXIOSIZE));
4199 }
4200
4201 #if 0
4202 int
4203 sys_write (fildes, buf, nbyte)
4204 int fildes;
4205 char *buf;
4206 unsigned int nbyte;
4207 {
4208 register int nwrote, rtnval = 0;
4209
4210 while (nbyte > MAXIOSIZE && (nwrote = write (fildes, buf, MAXIOSIZE)) > 0) {
4211 nbyte -= nwrote;
4212 buf += nwrote;
4213 rtnval += nwrote;
4214 }
4215 if (nwrote < 0)
4216 return rtnval ? rtnval : -1;
4217 if ((nwrote = write (fildes, buf, nbyte)) < 0)
4218 return rtnval ? rtnval : -1;
4219 return (rtnval + nwrote);
4220 }
4221 #endif /* 0 */
4222
4223 /*
4224 * VAX/VMS VAX C RTL really loses. It insists that records
4225 * end with a newline (carriage return) character, and if they
4226 * don't it adds one (nice of it isn't it!)
4227 *
4228 * Thus we do this stupidity below.
4229 */
4230
4231 #undef write
4232 int
4233 sys_write (fildes, buf, nbytes)
4234 int fildes;
4235 char *buf;
4236 unsigned int nbytes;
4237 {
4238 register char *p;
4239 register char *e;
4240 int sum = 0;
4241 struct stat st;
4242
4243 fstat (fildes, &st);
4244 p = buf;
4245 while (nbytes > 0)
4246 {
4247 int len, retval;
4248
4249 /* Handle fixed-length files with carriage control. */
4250 if (st.st_fab_rfm == FAB$C_FIX
4251 && ((st.st_fab_rat & (FAB$M_FTN | FAB$M_CR)) != 0))
4252 {
4253 len = st.st_fab_mrs;
4254 retval = write (fildes, p, min (len, nbytes));
4255 if (retval != len)
4256 return -1;
4257 retval++; /* This skips the implied carriage control */
4258 }
4259 else
4260 {
4261 e = p + min (MAXIOSIZE, nbytes) - 1;
4262 while (*e != '\n' && e > p) e--;
4263 if (p == e) /* Ok.. so here we add a newline... sigh. */
4264 e = p + min (MAXIOSIZE, nbytes) - 1;
4265 len = e + 1 - p;
4266 retval = write (fildes, p, len);
4267 if (retval != len)
4268 return -1;
4269 }
4270 p += retval;
4271 sum += retval;
4272 nbytes -= retval;
4273 }
4274 return sum;
4275 }
4276
4277 /* Create file NEW copying its attributes from file OLD. If
4278 OLD is 0 or does not exist, create based on the value of
4279 vms_stmlf_recfm. */
4280
4281 /* Protection value the file should ultimately have.
4282 Set by create_copy_attrs, and use by rename_sansversions. */
4283 static unsigned short int fab_final_pro;
4284
4285 int
4286 creat_copy_attrs (old, new)
4287 char *old, *new;
4288 {
4289 struct FAB fab = cc$rms_fab;
4290 struct XABPRO xabpro;
4291 char aclbuf[256]; /* Choice of size is arbitrary. See below. */
4292 extern int vms_stmlf_recfm;
4293
4294 if (old)
4295 {
4296 fab.fab$b_fac = FAB$M_GET;
4297 fab.fab$l_fna = old;
4298 fab.fab$b_fns = strlen (old);
4299 fab.fab$l_xab = (char *) &xabpro;
4300 xabpro = cc$rms_xabpro;
4301 xabpro.xab$l_aclbuf = aclbuf;
4302 xabpro.xab$w_aclsiz = sizeof aclbuf;
4303 /* Call $OPEN to fill in the fab & xabpro fields. */
4304 if (SYS$OPEN (&fab, 0, 0) & 1)
4305 {
4306 SYS$CLOSE (&fab, 0, 0);
4307 fab.fab$l_alq = 0; /* zero the allocation quantity */
4308 if (xabpro.xab$w_acllen > 0)
4309 {
4310 if (xabpro.xab$w_acllen > sizeof aclbuf)
4311 /* If the acl buffer was too short, redo open with longer one.
4312 Wouldn't need to do this if there were some system imposed
4313 limit on the size of an ACL, but I can't find any such. */
4314 {
4315 xabpro.xab$l_aclbuf = (char *) alloca (xabpro.xab$w_acllen);
4316 xabpro.xab$w_aclsiz = xabpro.xab$w_acllen;
4317 if (SYS$OPEN (&fab, 0, 0) & 1)
4318 SYS$CLOSE (&fab, 0, 0);
4319 else
4320 old = 0;
4321 }
4322 }
4323 else
4324 xabpro.xab$l_aclbuf = 0;
4325 }
4326 else
4327 old = 0;
4328 }
4329 fab.fab$l_fna = new;
4330 fab.fab$b_fns = strlen (new);
4331 if (!old)
4332 {
4333 fab.fab$l_xab = 0;
4334 fab.fab$b_rfm = vms_stmlf_recfm ? FAB$C_STMLF : FAB$C_VAR;
4335 fab.fab$b_rat = FAB$M_CR;
4336 }
4337
4338 /* Set the file protections such that we will be able to manipulate
4339 this file. Once we are done writing and renaming it, we will set
4340 the protections back. */
4341 if (old)
4342 fab_final_pro = xabpro.xab$w_pro;
4343 else
4344 SYS$SETDFPROT (0, &fab_final_pro);
4345 xabpro.xab$w_pro &= 0xff0f; /* set O:rewd for now. This is set back later. */
4346
4347 /* Create the new file with either default attrs or attrs copied
4348 from old file. */
4349 if (!(SYS$CREATE (&fab, 0, 0) & 1))
4350 return -1;
4351 SYS$CLOSE (&fab, 0, 0);
4352 /* As this is a "replacement" for creat, return a file descriptor
4353 opened for writing. */
4354 return open (new, O_WRONLY);
4355 }
4356
4357 #ifdef creat
4358 #undef creat
4359 #include <varargs.h>
4360 #ifdef __GNUC__
4361 #ifndef va_count
4362 #define va_count(X) ((X) = *(((int *) &(va_alist)) - 1))
4363 #endif
4364 #endif
4365
4366 int
4367 sys_creat (va_alist)
4368 va_dcl
4369 {
4370 va_list list_incrementer;
4371 char *name;
4372 int mode;
4373 int rfd; /* related file descriptor */
4374 int fd; /* Our new file descriptor */
4375 int count;
4376 struct stat st_buf;
4377 char rfm[12];
4378 char rat[15];
4379 char mrs[13];
4380 char fsz[13];
4381 extern int vms_stmlf_recfm;
4382
4383 va_count (count);
4384 va_start (list_incrementer);
4385 name = va_arg (list_incrementer, char *);
4386 mode = va_arg (list_incrementer, int);
4387 if (count > 2)
4388 rfd = va_arg (list_incrementer, int);
4389 va_end (list_incrementer);
4390 if (count > 2)
4391 {
4392 /* Use information from the related file descriptor to set record
4393 format of the newly created file. */
4394 fstat (rfd, &st_buf);
4395 switch (st_buf.st_fab_rfm)
4396 {
4397 case FAB$C_FIX:
4398 strcpy (rfm, "rfm = fix");
4399 sprintf (mrs, "mrs = %d", st_buf.st_fab_mrs);
4400 strcpy (rat, "rat = ");
4401 if (st_buf.st_fab_rat & FAB$M_CR)
4402 strcat (rat, "cr");
4403 else if (st_buf.st_fab_rat & FAB$M_FTN)
4404 strcat (rat, "ftn");
4405 else if (st_buf.st_fab_rat & FAB$M_PRN)
4406 strcat (rat, "prn");
4407 if (st_buf.st_fab_rat & FAB$M_BLK)
4408 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4409 strcat (rat, ", blk");
4410 else
4411 strcat (rat, "blk");
4412 return creat (name, 0, rfm, rat, mrs);
4413
4414 case FAB$C_VFC:
4415 strcpy (rfm, "rfm = vfc");
4416 sprintf (fsz, "fsz = %d", st_buf.st_fab_fsz);
4417 strcpy (rat, "rat = ");
4418 if (st_buf.st_fab_rat & FAB$M_CR)
4419 strcat (rat, "cr");
4420 else if (st_buf.st_fab_rat & FAB$M_FTN)
4421 strcat (rat, "ftn");
4422 else if (st_buf.st_fab_rat & FAB$M_PRN)
4423 strcat (rat, "prn");
4424 if (st_buf.st_fab_rat & FAB$M_BLK)
4425 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4426 strcat (rat, ", blk");
4427 else
4428 strcat (rat, "blk");
4429 return creat (name, 0, rfm, rat, fsz);
4430
4431 case FAB$C_STM:
4432 strcpy (rfm, "rfm = stm");
4433 break;
4434
4435 case FAB$C_STMCR:
4436 strcpy (rfm, "rfm = stmcr");
4437 break;
4438
4439 case FAB$C_STMLF:
4440 strcpy (rfm, "rfm = stmlf");
4441 break;
4442
4443 case FAB$C_UDF:
4444 strcpy (rfm, "rfm = udf");
4445 break;
4446
4447 case FAB$C_VAR:
4448 strcpy (rfm, "rfm = var");
4449 break;
4450 }
4451 strcpy (rat, "rat = ");
4452 if (st_buf.st_fab_rat & FAB$M_CR)
4453 strcat (rat, "cr");
4454 else if (st_buf.st_fab_rat & FAB$M_FTN)
4455 strcat (rat, "ftn");
4456 else if (st_buf.st_fab_rat & FAB$M_PRN)
4457 strcat (rat, "prn");
4458 if (st_buf.st_fab_rat & FAB$M_BLK)
4459 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4460 strcat (rat, ", blk");
4461 else
4462 strcat (rat, "blk");
4463 }
4464 else
4465 {
4466 strcpy (rfm, vms_stmlf_recfm ? "rfm = stmlf" : "rfm=var");
4467 strcpy (rat, "rat=cr");
4468 }
4469 /* Until the VAX C RTL fixes the many bugs with modes, always use
4470 mode 0 to get the user's default protection. */
4471 fd = creat (name, 0, rfm, rat);
4472 if (fd < 0 && errno == EEXIST)
4473 {
4474 if (unlink (name) < 0)
4475 report_file_error ("delete", build_string (name));
4476 fd = creat (name, 0, rfm, rat);
4477 }
4478 return fd;
4479 }
4480 #endif /* creat */
4481
4482 /* fwrite to stdout is S L O W. Speed it up by using fputc...*/
4483 int
4484 sys_fwrite (ptr, size, num, fp)
4485 register char * ptr;
4486 FILE * fp;
4487 {
4488 register int tot = num * size;
4489
4490 while (tot--)
4491 fputc (*ptr++, fp);
4492 return num;
4493 }
4494
4495 /*
4496 * The VMS C library routine creat actually creates a new version of an
4497 * existing file rather than truncating the old version. There are times
4498 * when this is not the desired behavior, for instance, when writing an
4499 * auto save file (you only want one version), or when you don't have
4500 * write permission in the directory containing the file (but the file
4501 * itself is writable). Hence this routine, which is equivalent to
4502 * "close (creat (fn, 0));" on Unix if fn already exists.
4503 */
4504 int
4505 vms_truncate (fn)
4506 char *fn;
4507 {
4508 struct FAB xfab = cc$rms_fab;
4509 struct RAB xrab = cc$rms_rab;
4510 int status;
4511
4512 xfab.fab$l_fop = FAB$M_TEF; /* free allocated but unused blocks on close */
4513 xfab.fab$b_fac = FAB$M_TRN | FAB$M_GET; /* allow truncate and get access */
4514 xfab.fab$b_shr = FAB$M_NIL; /* allow no sharing - file must be locked */
4515 xfab.fab$l_fna = fn;
4516 xfab.fab$b_fns = strlen (fn);
4517 xfab.fab$l_dna = ";0"; /* default to latest version of the file */
4518 xfab.fab$b_dns = 2;
4519 xrab.rab$l_fab = &xfab;
4520
4521 /* This gibberish opens the file, positions to the first record, and
4522 deletes all records from there until the end of file. */
4523 if ((SYS$OPEN (&xfab) & 01) == 01)
4524 {
4525 if ((SYS$CONNECT (&xrab) & 01) == 01 &&
4526 (SYS$FIND (&xrab) & 01) == 01 &&
4527 (SYS$TRUNCATE (&xrab) & 01) == 01)
4528 status = 0;
4529 else
4530 status = -1;
4531 }
4532 else
4533 status = -1;
4534 SYS$CLOSE (&xfab);
4535 return status;
4536 }
4537
4538 /* Define this symbol to actually read SYSUAF.DAT. This requires either
4539 SYSPRV or a readable SYSUAF.DAT. */
4540
4541 #ifdef READ_SYSUAF
4542 /*
4543 * getuaf.c
4544 *
4545 * Routine to read the VMS User Authorization File and return
4546 * a specific user's record.
4547 */
4548
4549 static struct UAF retuaf;
4550
4551 struct UAF *
4552 get_uaf_name (uname)
4553 char * uname;
4554 {
4555 register status;
4556 struct FAB uaf_fab;
4557 struct RAB uaf_rab;
4558
4559 uaf_fab = cc$rms_fab;
4560 uaf_rab = cc$rms_rab;
4561 /* initialize fab fields */
4562 uaf_fab.fab$l_fna = "SYS$SYSTEM:SYSUAF.DAT";
4563 uaf_fab.fab$b_fns = 21;
4564 uaf_fab.fab$b_fac = FAB$M_GET;
4565 uaf_fab.fab$b_org = FAB$C_IDX;
4566 uaf_fab.fab$b_shr = FAB$M_GET|FAB$M_PUT|FAB$M_UPD|FAB$M_DEL;
4567 /* initialize rab fields */
4568 uaf_rab.rab$l_fab = &uaf_fab;
4569 /* open the User Authorization File */
4570 status = SYS$OPEN (&uaf_fab);
4571 if (!(status&1))
4572 {
4573 errno = EVMSERR;
4574 vaxc$errno = status;
4575 return 0;
4576 }
4577 status = SYS$CONNECT (&uaf_rab);
4578 if (!(status&1))
4579 {
4580 errno = EVMSERR;
4581 vaxc$errno = status;
4582 return 0;
4583 }
4584 /* read the requested record - index is in uname */
4585 uaf_rab.rab$l_kbf = uname;
4586 uaf_rab.rab$b_ksz = strlen (uname);
4587 uaf_rab.rab$b_rac = RAB$C_KEY;
4588 uaf_rab.rab$l_ubf = (char *)&retuaf;
4589 uaf_rab.rab$w_usz = sizeof retuaf;
4590 status = SYS$GET (&uaf_rab);
4591 if (!(status&1))
4592 {
4593 errno = EVMSERR;
4594 vaxc$errno = status;
4595 return 0;
4596 }
4597 /* close the User Authorization File */
4598 status = SYS$DISCONNECT (&uaf_rab);
4599 if (!(status&1))
4600 {
4601 errno = EVMSERR;
4602 vaxc$errno = status;
4603 return 0;
4604 }
4605 status = SYS$CLOSE (&uaf_fab);
4606 if (!(status&1))
4607 {
4608 errno = EVMSERR;
4609 vaxc$errno = status;
4610 return 0;
4611 }
4612 return &retuaf;
4613 }
4614
4615 struct UAF *
4616 get_uaf_uic (uic)
4617 unsigned long uic;
4618 {
4619 register status;
4620 struct FAB uaf_fab;
4621 struct RAB uaf_rab;
4622
4623 uaf_fab = cc$rms_fab;
4624 uaf_rab = cc$rms_rab;
4625 /* initialize fab fields */
4626 uaf_fab.fab$l_fna = "SYS$SYSTEM:SYSUAF.DAT";
4627 uaf_fab.fab$b_fns = 21;
4628 uaf_fab.fab$b_fac = FAB$M_GET;
4629 uaf_fab.fab$b_org = FAB$C_IDX;
4630 uaf_fab.fab$b_shr = FAB$M_GET|FAB$M_PUT|FAB$M_UPD|FAB$M_DEL;
4631 /* initialize rab fields */
4632 uaf_rab.rab$l_fab = &uaf_fab;
4633 /* open the User Authorization File */
4634 status = SYS$OPEN (&uaf_fab);
4635 if (!(status&1))
4636 {
4637 errno = EVMSERR;
4638 vaxc$errno = status;
4639 return 0;
4640 }
4641 status = SYS$CONNECT (&uaf_rab);
4642 if (!(status&1))
4643 {
4644 errno = EVMSERR;
4645 vaxc$errno = status;
4646 return 0;
4647 }
4648 /* read the requested record - index is in uic */
4649 uaf_rab.rab$b_krf = 1; /* 1st alternate key */
4650 uaf_rab.rab$l_kbf = (char *) &uic;
4651 uaf_rab.rab$b_ksz = sizeof uic;
4652 uaf_rab.rab$b_rac = RAB$C_KEY;
4653 uaf_rab.rab$l_ubf = (char *)&retuaf;
4654 uaf_rab.rab$w_usz = sizeof retuaf;
4655 status = SYS$GET (&uaf_rab);
4656 if (!(status&1))
4657 {
4658 errno = EVMSERR;
4659 vaxc$errno = status;
4660 return 0;
4661 }
4662 /* close the User Authorization File */
4663 status = SYS$DISCONNECT (&uaf_rab);
4664 if (!(status&1))
4665 {
4666 errno = EVMSERR;
4667 vaxc$errno = status;
4668 return 0;
4669 }
4670 status = SYS$CLOSE (&uaf_fab);
4671 if (!(status&1))
4672 {
4673 errno = EVMSERR;
4674 vaxc$errno = status;
4675 return 0;
4676 }
4677 return &retuaf;
4678 }
4679
4680 static struct passwd retpw;
4681
4682 struct passwd *
4683 cnv_uaf_pw (up)
4684 struct UAF * up;
4685 {
4686 char * ptr;
4687
4688 /* copy these out first because if the username is 32 chars, the next
4689 section will overwrite the first byte of the UIC */
4690 retpw.pw_uid = up->uaf$w_mem;
4691 retpw.pw_gid = up->uaf$w_grp;
4692
4693 /* I suppose this is not the best style, to possibly overwrite one
4694 byte beyond the end of the field, but what the heck... */
4695 ptr = &up->uaf$t_username[UAF$S_USERNAME];
4696 while (ptr[-1] == ' ')
4697 ptr--;
4698 *ptr = '\0';
4699 strcpy (retpw.pw_name, up->uaf$t_username);
4700
4701 /* the rest of these are counted ascii strings */
4702 strncpy (retpw.pw_gecos, &up->uaf$t_owner[1], up->uaf$t_owner[0]);
4703 retpw.pw_gecos[up->uaf$t_owner[0]] = '\0';
4704 strncpy (retpw.pw_dir, &up->uaf$t_defdev[1], up->uaf$t_defdev[0]);
4705 retpw.pw_dir[up->uaf$t_defdev[0]] = '\0';
4706 strncat (retpw.pw_dir, &up->uaf$t_defdir[1], up->uaf$t_defdir[0]);
4707 retpw.pw_dir[up->uaf$t_defdev[0] + up->uaf$t_defdir[0]] = '\0';
4708 strncpy (retpw.pw_shell, &up->uaf$t_defcli[1], up->uaf$t_defcli[0]);
4709 retpw.pw_shell[up->uaf$t_defcli[0]] = '\0';
4710
4711 return &retpw;
4712 }
4713 #else /* not READ_SYSUAF */
4714 static struct passwd retpw;
4715 #endif /* not READ_SYSUAF */
4716
4717 struct passwd *
4718 getpwnam (name)
4719 char * name;
4720 {
4721 #ifdef READ_SYSUAF
4722 struct UAF *up;
4723 #else
4724 char * user;
4725 char * dir;
4726 unsigned char * full;
4727 #endif /* READ_SYSUAF */
4728 char *ptr = name;
4729
4730 while (*ptr)
4731 {
4732 if ('a' <= *ptr && *ptr <= 'z')
4733 *ptr -= 040;
4734 ptr++;
4735 }
4736 #ifdef READ_SYSUAF
4737 if (!(up = get_uaf_name (name)))
4738 return 0;
4739 return cnv_uaf_pw (up);
4740 #else
4741 if (strcmp (name, getenv ("USER")) == 0)
4742 {
4743 retpw.pw_uid = getuid ();
4744 retpw.pw_gid = getgid ();
4745 strcpy (retpw.pw_name, name);
4746 if (full = egetenv ("FULLNAME"))
4747 strcpy (retpw.pw_gecos, full);
4748 else
4749 *retpw.pw_gecos = '\0';
4750 strcpy (retpw.pw_dir, egetenv ("HOME"));
4751 *retpw.pw_shell = '\0';
4752 return &retpw;
4753 }
4754 else
4755 return 0;
4756 #endif /* not READ_SYSUAF */
4757 }
4758
4759 struct passwd *
4760 getpwuid (uid)
4761 unsigned long uid;
4762 {
4763 #ifdef READ_SYSUAF
4764 struct UAF * up;
4765
4766 if (!(up = get_uaf_uic (uid)))
4767 return 0;
4768 return cnv_uaf_pw (up);
4769 #else
4770 if (uid == sys_getuid ())
4771 return getpwnam (egetenv ("USER"));
4772 else
4773 return 0;
4774 #endif /* not READ_SYSUAF */
4775 }
4776
4777 /* return total address space available to the current process. This is
4778 the sum of the current p0 size, p1 size and free page table entries
4779 available. */
4780 int
4781 vlimit ()
4782 {
4783 int item_code;
4784 unsigned long free_pages;
4785 unsigned long frep0va;
4786 unsigned long frep1va;
4787 register status;
4788
4789 item_code = JPI$_FREPTECNT;
4790 if (((status = LIB$GETJPI (&item_code, 0, 0, &free_pages)) & 1) == 0)
4791 {
4792 errno = EVMSERR;
4793 vaxc$errno = status;
4794 return -1;
4795 }
4796 free_pages *= 512;
4797
4798 item_code = JPI$_FREP0VA;
4799 if (((status = LIB$GETJPI (&item_code, 0, 0, &frep0va)) & 1) == 0)
4800 {
4801 errno = EVMSERR;
4802 vaxc$errno = status;
4803 return -1;
4804 }
4805 item_code = JPI$_FREP1VA;
4806 if (((status = LIB$GETJPI (&item_code, 0, 0, &frep1va)) & 1) == 0)
4807 {
4808 errno = EVMSERR;
4809 vaxc$errno = status;
4810 return -1;
4811 }
4812
4813 return free_pages + frep0va + (0x7fffffff - frep1va);
4814 }
4815
4816 int
4817 define_logical_name (varname, string)
4818 char *varname;
4819 char *string;
4820 {
4821 struct dsc$descriptor_s strdsc =
4822 {strlen (string), DSC$K_DTYPE_T, DSC$K_CLASS_S, string};
4823 struct dsc$descriptor_s envdsc =
4824 {strlen (varname), DSC$K_DTYPE_T, DSC$K_CLASS_S, varname};
4825 struct dsc$descriptor_s lnmdsc =
4826 {7, DSC$K_DTYPE_T, DSC$K_CLASS_S, "LNM$JOB"};
4827
4828 return LIB$SET_LOGICAL (&envdsc, &strdsc, &lnmdsc, 0, 0);
4829 }
4830
4831 int
4832 delete_logical_name (varname)
4833 char *varname;
4834 {
4835 struct dsc$descriptor_s envdsc =
4836 {strlen (varname), DSC$K_DTYPE_T, DSC$K_CLASS_S, varname};
4837 struct dsc$descriptor_s lnmdsc =
4838 {7, DSC$K_DTYPE_T, DSC$K_CLASS_S, "LNM$JOB"};
4839
4840 return LIB$DELETE_LOGICAL (&envdsc, &lnmdsc);
4841 }
4842
4843 int
4844 ulimit ()
4845 {
4846 return 0;
4847 }
4848
4849 int
4850 setpgrp ()
4851 {
4852 return 0;
4853 }
4854
4855 int
4856 execvp ()
4857 {
4858 error ("execvp system call not implemented");
4859 return -1;
4860 }
4861
4862 int
4863 rename (from, to)
4864 char *from, *to;
4865 {
4866 int status;
4867 struct FAB from_fab = cc$rms_fab, to_fab = cc$rms_fab;
4868 struct NAM from_nam = cc$rms_nam, to_nam = cc$rms_nam;
4869 char from_esn[NAM$C_MAXRSS];
4870 char to_esn[NAM$C_MAXRSS];
4871
4872 from_fab.fab$l_fna = from;
4873 from_fab.fab$b_fns = strlen (from);
4874 from_fab.fab$l_nam = &from_nam;
4875 from_fab.fab$l_fop = FAB$M_NAM;
4876
4877 from_nam.nam$l_esa = from_esn;
4878 from_nam.nam$b_ess = sizeof from_esn;
4879
4880 to_fab.fab$l_fna = to;
4881 to_fab.fab$b_fns = strlen (to);
4882 to_fab.fab$l_nam = &to_nam;
4883 to_fab.fab$l_fop = FAB$M_NAM;
4884
4885 to_nam.nam$l_esa = to_esn;
4886 to_nam.nam$b_ess = sizeof to_esn;
4887
4888 status = SYS$RENAME (&from_fab, 0, 0, &to_fab);
4889
4890 if (status & 1)
4891 return 0;
4892 else
4893 {
4894 if (status == RMS$_DEV)
4895 errno = EXDEV;
4896 else
4897 errno = EVMSERR;
4898 vaxc$errno = status;
4899 return -1;
4900 }
4901 }
4902
4903 /* This function renames a file like `rename', but it strips
4904 the version number from the "to" filename, such that the "to" file is
4905 will always be a new version. It also sets the file protection once it is
4906 finished. The protection that we will use is stored in fab_final_pro,
4907 and was set when we did a creat_copy_attrs to create the file that we
4908 are renaming.
4909
4910 We could use the chmod function, but Eunichs uses 3 bits per user category
4911 to describe the protection, and VMS uses 4 (write and delete are separate
4912 bits). To maintain portability, the VMS implementation of `chmod' wires
4913 the W and D bits together. */
4914
4915
4916 static struct fibdef fib; /* We need this initialized to zero */
4917 char vms_file_written[NAM$C_MAXRSS];
4918
4919 int
4920 rename_sans_version (from,to)
4921 char *from, *to;
4922 {
4923 short int chan;
4924 int stat;
4925 short int iosb[4];
4926 int status;
4927 struct FAB to_fab = cc$rms_fab;
4928 struct NAM to_nam = cc$rms_nam;
4929 struct dsc$descriptor fib_d ={sizeof (fib),0,0,(char*) &fib};
4930 struct dsc$descriptor fib_attr[2]
4931 = {{sizeof (fab_final_pro),ATR$C_FPRO,0,(char*) &fab_final_pro},{0,0,0,0}};
4932 char to_esn[NAM$C_MAXRSS];
4933
4934 $DESCRIPTOR (disk,to_esn);
4935
4936 to_fab.fab$l_fna = to;
4937 to_fab.fab$b_fns = strlen (to);
4938 to_fab.fab$l_nam = &to_nam;
4939 to_fab.fab$l_fop = FAB$M_NAM;
4940
4941 to_nam.nam$l_esa = to_esn;
4942 to_nam.nam$b_ess = sizeof to_esn;
4943
4944 status = SYS$PARSE (&to_fab, 0, 0); /* figure out the full file name */
4945
4946 if (to_nam.nam$l_fnb && NAM$M_EXP_VER)
4947 *(to_nam.nam$l_ver) = '\0';
4948
4949 stat = rename (from, to_esn);
4950 if (stat < 0)
4951 return stat;
4952
4953 strcpy (vms_file_written, to_esn);
4954
4955 to_fab.fab$l_fna = vms_file_written; /* this points to the versionless name */
4956 to_fab.fab$b_fns = strlen (vms_file_written);
4957
4958 /* Now set the file protection to the correct value */
4959 SYS$OPEN (&to_fab, 0, 0); /* This fills in the nam$w_fid fields */
4960
4961 /* Copy these fields into the fib */
4962 fib.fib$r_fid_overlay.fib$w_fid[0] = to_nam.nam$w_fid[0];
4963 fib.fib$r_fid_overlay.fib$w_fid[1] = to_nam.nam$w_fid[1];
4964 fib.fib$r_fid_overlay.fib$w_fid[2] = to_nam.nam$w_fid[2];
4965
4966 SYS$CLOSE (&to_fab, 0, 0);
4967
4968 stat = SYS$ASSIGN (&disk, &chan, 0, 0); /* open a channel to the disk */
4969 if (!stat)
4970 LIB$SIGNAL (stat);
4971 stat = SYS$QIOW (0, chan, IO$_MODIFY, iosb, 0, 0, &fib_d,
4972 0, 0, 0, &fib_attr, 0);
4973 if (!stat)
4974 LIB$SIGNAL (stat);
4975 stat = SYS$DASSGN (chan);
4976 if (!stat)
4977 LIB$SIGNAL (stat);
4978 strcpy (vms_file_written, to_esn); /* We will write this to the terminal*/
4979 return 0;
4980 }
4981
4982 int
4983 link (file, new)
4984 char * file, * new;
4985 {
4986 register status;
4987 struct FAB fab;
4988 struct NAM nam;
4989 unsigned short fid[3];
4990 char esa[NAM$C_MAXRSS];
4991
4992 fab = cc$rms_fab;
4993 fab.fab$l_fop = FAB$M_OFP;
4994 fab.fab$l_fna = file;
4995 fab.fab$b_fns = strlen (file);
4996 fab.fab$l_nam = &nam;
4997
4998 nam = cc$rms_nam;
4999 nam.nam$l_esa = esa;
5000 nam.nam$b_ess = NAM$C_MAXRSS;
5001
5002 status = SYS$PARSE (&fab);
5003 if ((status & 1) == 0)
5004 {
5005 errno = EVMSERR;
5006 vaxc$errno = status;
5007 return -1;
5008 }
5009 status = SYS$SEARCH (&fab);
5010 if ((status & 1) == 0)
5011 {
5012 errno = EVMSERR;
5013 vaxc$errno = status;
5014 return -1;
5015 }
5016
5017 fid[0] = nam.nam$w_fid[0];
5018 fid[1] = nam.nam$w_fid[1];
5019 fid[2] = nam.nam$w_fid[2];
5020
5021 fab.fab$l_fna = new;
5022 fab.fab$b_fns = strlen (new);
5023
5024 status = SYS$PARSE (&fab);
5025 if ((status & 1) == 0)
5026 {
5027 errno = EVMSERR;
5028 vaxc$errno = status;
5029 return -1;
5030 }
5031
5032 nam.nam$w_fid[0] = fid[0];
5033 nam.nam$w_fid[1] = fid[1];
5034 nam.nam$w_fid[2] = fid[2];
5035
5036 nam.nam$l_esa = nam.nam$l_name;
5037 nam.nam$b_esl = nam.nam$b_name + nam.nam$b_type + nam.nam$b_ver;
5038
5039 status = SYS$ENTER (&fab);
5040 if ((status & 1) == 0)
5041 {
5042 errno = EVMSERR;
5043 vaxc$errno = status;
5044 return -1;
5045 }
5046
5047 return 0;
5048 }
5049
5050 void
5051 croak (badfunc)
5052 char *badfunc;
5053 {
5054 printf ("%s not yet implemented\r\n", badfunc);
5055 reset_sys_modes ();
5056 exit (1);
5057 }
5058
5059 long
5060 random ()
5061 {
5062 /* Arrange to return a range centered on zero. */
5063 return rand () - (1 << 30);
5064 }
5065
5066 void
5067 srandom (seed)
5068 {
5069 srand (seed);
5070 }
5071 #endif /* VMS */
5072 \f
5073 #ifdef AIXHFT
5074
5075 /* Called from init_sys_modes. */
5076 void
5077 hft_init ()
5078 {
5079 int junk;
5080
5081 /* If we're not on an HFT we shouldn't do any of this. We determine
5082 if we are on an HFT by trying to get an HFT error code. If this
5083 call fails, we're not on an HFT. */
5084 #ifdef IBMR2AIX
5085 if (ioctl (0, HFQERROR, &junk) < 0)
5086 return;
5087 #else /* not IBMR2AIX */
5088 if (ioctl (0, HFQEIO, 0) < 0)
5089 return;
5090 #endif /* not IBMR2AIX */
5091
5092 /* On AIX the default hft keyboard mapping uses backspace rather than delete
5093 as the rubout key's ASCII code. Here this is changed. The bug is that
5094 there's no way to determine the old mapping, so in reset_sys_modes
5095 we need to assume that the normal map had been present. Of course, this
5096 code also doesn't help if on a terminal emulator which doesn't understand
5097 HFT VTD's. */
5098 {
5099 struct hfbuf buf;
5100 struct hfkeymap keymap;
5101
5102 buf.hf_bufp = (char *)&keymap;
5103 buf.hf_buflen = sizeof (keymap);
5104 keymap.hf_nkeys = 2;
5105 keymap.hfkey[0].hf_kpos = 15;
5106 keymap.hfkey[0].hf_kstate = HFMAPCHAR | HFSHFNONE;
5107 #ifdef IBMR2AIX
5108 keymap.hfkey[0].hf_keyidh = '<';
5109 #else /* not IBMR2AIX */
5110 keymap.hfkey[0].hf_page = '<';
5111 #endif /* not IBMR2AIX */
5112 keymap.hfkey[0].hf_char = 127;
5113 keymap.hfkey[1].hf_kpos = 15;
5114 keymap.hfkey[1].hf_kstate = HFMAPCHAR | HFSHFSHFT;
5115 #ifdef IBMR2AIX
5116 keymap.hfkey[1].hf_keyidh = '<';
5117 #else /* not IBMR2AIX */
5118 keymap.hfkey[1].hf_page = '<';
5119 #endif /* not IBMR2AIX */
5120 keymap.hfkey[1].hf_char = 127;
5121 hftctl (0, HFSKBD, &buf);
5122 }
5123 /* The HFT system on AIX doesn't optimize for scrolling, so it's really ugly
5124 at times. */
5125 line_ins_del_ok = char_ins_del_ok = 0;
5126 }
5127
5128 /* Reset the rubout key to backspace. */
5129
5130 void
5131 hft_reset ()
5132 {
5133 struct hfbuf buf;
5134 struct hfkeymap keymap;
5135 int junk;
5136
5137 #ifdef IBMR2AIX
5138 if (ioctl (0, HFQERROR, &junk) < 0)
5139 return;
5140 #else /* not IBMR2AIX */
5141 if (ioctl (0, HFQEIO, 0) < 0)
5142 return;
5143 #endif /* not IBMR2AIX */
5144
5145 buf.hf_bufp = (char *)&keymap;
5146 buf.hf_buflen = sizeof (keymap);
5147 keymap.hf_nkeys = 2;
5148 keymap.hfkey[0].hf_kpos = 15;
5149 keymap.hfkey[0].hf_kstate = HFMAPCHAR | HFSHFNONE;
5150 #ifdef IBMR2AIX
5151 keymap.hfkey[0].hf_keyidh = '<';
5152 #else /* not IBMR2AIX */
5153 keymap.hfkey[0].hf_page = '<';
5154 #endif /* not IBMR2AIX */
5155 keymap.hfkey[0].hf_char = 8;
5156 keymap.hfkey[1].hf_kpos = 15;
5157 keymap.hfkey[1].hf_kstate = HFMAPCHAR | HFSHFSHFT;
5158 #ifdef IBMR2AIX
5159 keymap.hfkey[1].hf_keyidh = '<';
5160 #else /* not IBMR2AIX */
5161 keymap.hfkey[1].hf_page = '<';
5162 #endif /* not IBMR2AIX */
5163 keymap.hfkey[1].hf_char = 8;
5164 hftctl (0, HFSKBD, &buf);
5165 }
5166
5167 #endif /* AIXHFT */
5168
5169 #ifdef USE_DL_STUBS
5170
5171 /* These are included on Sunos 4.1 when we do not use shared libraries.
5172 X11 libraries may refer to these functions but (we hope) do not
5173 actually call them. */
5174
5175 void *
5176 dlopen ()
5177 {
5178 return 0;
5179 }
5180
5181 void *
5182 dlsym ()
5183 {
5184 return 0;
5185 }
5186
5187 int
5188 dlclose ()
5189 {
5190 return -1;
5191 }
5192
5193 #endif /* USE_DL_STUBS */
5194 \f
5195 #ifndef BSTRING
5196
5197 #ifndef bzero
5198
5199 void
5200 bzero (b, length)
5201 register char *b;
5202 register int length;
5203 {
5204 #ifdef VMS
5205 short zero = 0;
5206 long max_str = 65535;
5207
5208 while (length > max_str) {
5209 (void) LIB$MOVC5 (&zero, &zero, &zero, &max_str, b);
5210 length -= max_str;
5211 b += max_str;
5212 }
5213 max_str = length;
5214 (void) LIB$MOVC5 (&zero, &zero, &zero, &max_str, b);
5215 #else
5216 while (length-- > 0)
5217 *b++ = 0;
5218 #endif /* not VMS */
5219 }
5220
5221 #endif /* no bzero */
5222 #endif /* BSTRING */
5223
5224 #if (!defined (BSTRING) && !defined (bcopy)) || defined (NEED_BCOPY)
5225 #undef bcopy
5226
5227 /* Saying `void' requires a declaration, above, where bcopy is used
5228 and that declaration causes pain for systems where bcopy is a macro. */
5229 bcopy (b1, b2, length)
5230 register char *b1;
5231 register char *b2;
5232 register int length;
5233 {
5234 #ifdef VMS
5235 long max_str = 65535;
5236
5237 while (length > max_str) {
5238 (void) LIB$MOVC3 (&max_str, b1, b2);
5239 length -= max_str;
5240 b1 += max_str;
5241 b2 += max_str;
5242 }
5243 max_str = length;
5244 (void) LIB$MOVC3 (&length, b1, b2);
5245 #else
5246 while (length-- > 0)
5247 *b2++ = *b1++;
5248 #endif /* not VMS */
5249 }
5250 #endif /* (!defined (BSTRING) && !defined (bcopy)) || defined (NEED_BCOPY) */
5251
5252 #ifndef BSTRING
5253 #ifndef bcmp
5254 int
5255 bcmp (b1, b2, length) /* This could be a macro! */
5256 register char *b1;
5257 register char *b2;
5258 register int length;
5259 {
5260 #ifdef VMS
5261 struct dsc$descriptor_s src1 = {length, DSC$K_DTYPE_T, DSC$K_CLASS_S, b1};
5262 struct dsc$descriptor_s src2 = {length, DSC$K_DTYPE_T, DSC$K_CLASS_S, b2};
5263
5264 return STR$COMPARE (&src1, &src2);
5265 #else
5266 while (length-- > 0)
5267 if (*b1++ != *b2++)
5268 return 1;
5269
5270 return 0;
5271 #endif /* not VMS */
5272 }
5273 #endif /* no bcmp */
5274 #endif /* not BSTRING */
5275 \f
5276 #ifndef HAVE_STRSIGNAL
5277 char *
5278 strsignal (code)
5279 int code;
5280 {
5281 char *signame = 0;
5282
5283 if (0 <= code && code < NSIG)
5284 {
5285 #ifdef VMS
5286 signame = sys_errlist[code];
5287 #else
5288 /* Cast to suppress warning if the table has const char *. */
5289 signame = (char *) sys_siglist[code];
5290 #endif
5291 }
5292
5293 return signame;
5294 }
5295 #endif /* HAVE_STRSIGNAL */
5296