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