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Move include stdio.h to same place as in other files.
[bpt/emacs.git] / src / sysdep.c
1 /* Interfaces to system-dependent kernel and library entries.
2 Copyright (C) 1985, 86,87,88,93,94,95,1999,2000,01,2003
3 Free Software Foundation, Inc.
4
5 This file is part of GNU Emacs.
6
7 GNU Emacs is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
10 any later version.
11
12 GNU Emacs is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs; see the file COPYING. If not, write to
19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
21
22 #ifdef HAVE_CONFIG_H
23 #include <config.h>
24 #endif
25
26 #include <signal.h>
27 #include <stdio.h>
28 #include <setjmp.h>
29 #ifdef HAVE_UNISTD_H
30 #include <unistd.h>
31 #endif
32 #include "lisp.h"
33 /* Including stdlib.h isn't necessarily enough to get srandom
34 declared, e.g. without __USE_XOPEN_EXTENDED with glibc 2. */
35 #ifdef HAVE_RANDOM
36 #if 0 /* It turns out that defining _OSF_SOURCE in osf5-0.h gets
37 random prototyped as returning `int'. It looks to me as
38 though the best way to DTRT is to prefer the rand48 functions
39 (per libc.info). -- fx */
40 extern long int random P_ ((void));
41 #endif
42 #if 0 /* Don't prototype srandom; it takes an unsigned argument on
43 some systems, and an unsigned long on others, like FreeBSD
44 4.1. */
45 extern void srandom P_ ((unsigned int));
46 #endif
47 #endif
48
49 #include "blockinput.h"
50 #undef NULL
51
52 #ifdef MAC_OS8
53 /* It is essential to include stdlib.h so that this file picks up
54 the correct definitions of rand, srand, and RAND_MAX.
55 Otherwise random numbers will not work correctly. */
56 #include <stdlib.h>
57
58 #ifndef subprocesses
59 /* Nonzero means delete a process right away if it exits (process.c). */
60 static int delete_exited_processes;
61 #endif
62 #endif /* MAC_OS8 */
63
64 #ifdef WINDOWSNT
65 #define read sys_read
66 #define write sys_write
67 #include <windows.h>
68 #ifndef NULL
69 #define NULL 0
70 #endif
71 #endif /* not WINDOWSNT */
72
73 #ifdef HAVE_CARBON
74 #define read sys_read
75 #endif
76
77 /* Does anyone other than VMS need this? */
78 #ifndef fwrite
79 #define sys_fwrite fwrite
80 #else
81 #undef fwrite
82 #endif
83
84 #include <sys/types.h>
85 #include <sys/stat.h>
86 #include <errno.h>
87
88 #ifdef HAVE_SETPGID
89 #if !defined (USG) || defined (BSD_PGRPS)
90 #undef setpgrp
91 #define setpgrp setpgid
92 #endif
93 #endif
94
95 /* Get SI_SRPC_DOMAIN, if it is available. */
96 #ifdef HAVE_SYS_SYSTEMINFO_H
97 #include <sys/systeminfo.h>
98 #endif
99
100 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida, MW Aug 1993 */
101 #include <dos.h>
102 #include "dosfns.h"
103 #include "msdos.h"
104 #include <sys/param.h>
105
106 #if __DJGPP__ > 1
107 extern int etext;
108 extern unsigned start __asm__ ("start");
109 #endif
110 #endif
111
112 #ifndef USE_CRT_DLL
113 #ifndef errno
114 extern int errno;
115 #endif
116 #endif
117
118 #ifdef VMS
119 #include <rms.h>
120 #include <ttdef.h>
121 #include <tt2def.h>
122 #include <iodef.h>
123 #include <ssdef.h>
124 #include <descrip.h>
125 #include <fibdef.h>
126 #include <atrdef.h>
127 #include <ctype.h>
128 #include <string.h>
129 #ifdef __GNUC__
130 #include <sys/file.h>
131 #else
132 #include <file.h>
133 #endif
134 #undef F_SETFL
135 #ifndef RAB$C_BID
136 #include <rab.h>
137 #endif
138 #define MAXIOSIZE (32 * PAGESIZE) /* Don't I/O more than 32 blocks at a time */
139 #endif /* VMS */
140
141 #ifndef VMS
142 #include <sys/file.h>
143 #endif /* not VMS */
144
145 #ifdef HAVE_FCNTL_H
146 #include <fcntl.h>
147 #endif
148
149 #ifndef MSDOS
150 #include <sys/ioctl.h>
151 #endif
152
153 #include "systty.h"
154 #include "syswait.h"
155
156 #ifdef BROKEN_TIOCGWINSZ
157 #undef TIOCGWINSZ
158 #undef TIOCSWINSZ
159 #endif
160
161 #if defined (USG) || defined (DGUX)
162 #include <sys/utsname.h>
163 #ifndef MEMORY_IN_STRING_H
164 #include <memory.h>
165 #endif
166 #if defined (TIOCGWINSZ) || defined (ISC4_0)
167 #ifdef NEED_SIOCTL
168 #include <sys/sioctl.h>
169 #endif
170 #ifdef NEED_PTEM_H
171 #include <sys/stream.h>
172 #include <sys/ptem.h>
173 #endif
174 #endif /* TIOCGWINSZ or ISC4_0 */
175 #endif /* USG or DGUX */
176
177 extern int quit_char;
178
179 #include "keyboard.h"
180 #include "frame.h"
181 #include "window.h"
182 #include "termhooks.h"
183 #include "termchar.h"
184 #include "termopts.h"
185 #include "dispextern.h"
186 #include "process.h"
187
188 #ifdef WINDOWSNT
189 #include <direct.h>
190 /* In process.h which conflicts with the local copy. */
191 #define _P_WAIT 0
192 int _CRTAPI1 _spawnlp (int, const char *, const char *, ...);
193 int _CRTAPI1 _getpid (void);
194 #endif
195
196 #ifdef NONSYSTEM_DIR_LIBRARY
197 #include "ndir.h"
198 #endif /* NONSYSTEM_DIR_LIBRARY */
199
200 #include "syssignal.h"
201 #include "systime.h"
202 #ifdef HAVE_UTIME_H
203 #include <utime.h>
204 #endif
205
206 #ifndef HAVE_UTIMES
207 #ifndef HAVE_STRUCT_UTIMBUF
208 /* We want to use utime rather than utimes, but we couldn't find the
209 structure declaration. We'll use the traditional one. */
210 struct utimbuf {
211 long actime;
212 long modtime;
213 };
214 #endif
215 #endif
216
217 /* LPASS8 is new in 4.3, and makes cbreak mode provide all 8 bits. */
218 #ifndef LPASS8
219 #define LPASS8 0
220 #endif
221
222 #ifdef BSD4_1
223 #define LNOFLSH 0100000
224 #endif
225
226 static int baud_convert[] =
227 #ifdef BAUD_CONVERT
228 BAUD_CONVERT;
229 #else
230 {
231 0, 50, 75, 110, 135, 150, 200, 300, 600, 1200,
232 1800, 2400, 4800, 9600, 19200, 38400
233 };
234 #endif
235
236 #ifdef HAVE_SPEED_T
237 #include <termios.h>
238 #else
239 #if defined (HAVE_LIBNCURSES) && ! defined (NCURSES_OSPEED_T)
240 #else
241 #if defined (HAVE_TERMIOS_H) && defined (GNU_LINUX)
242 #include <termios.h>
243 #endif
244 #endif
245 #endif
246
247 int emacs_ospeed;
248
249 /* The file descriptor for Emacs's input terminal.
250 Under Unix, this is normally zero except when using X;
251 under VMS, we place the input channel number here. */
252 int input_fd;
253
254 void croak P_ ((char *));
255
256 #ifdef AIXHFT
257 void hft_init ();
258 void hft_reset ();
259 #endif
260
261 /* Temporary used by `sigblock' when defined in terms of signprocmask. */
262
263 SIGMASKTYPE sigprocmask_set;
264
265 \f
266 /* Specify a different file descriptor for further input operations. */
267
268 void
269 change_input_fd (fd)
270 int fd;
271 {
272 input_fd = fd;
273 }
274
275 /* Discard pending input on descriptor input_fd. */
276
277 void
278 discard_tty_input ()
279 {
280 #ifndef WINDOWSNT
281 struct emacs_tty buf;
282
283 if (noninteractive)
284 return;
285
286 /* Discarding input is not safe when the input could contain
287 replies from the X server. So don't do it. */
288 if (read_socket_hook)
289 return;
290
291 #ifdef VMS
292 end_kbd_input ();
293 SYS$QIOW (0, input_fd, IO$_READVBLK|IO$M_PURGE, input_iosb, 0, 0,
294 &buf.main, 0, 0, terminator_mask, 0, 0);
295 queue_kbd_input ();
296 #else /* not VMS */
297 #ifdef APOLLO
298 {
299 int zero = 0;
300 ioctl (input_fd, TIOCFLUSH, &zero);
301 }
302 #else /* not Apollo */
303 #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */
304 while (dos_keyread () != -1)
305 ;
306 #else /* not MSDOS */
307 EMACS_GET_TTY (input_fd, &buf);
308 EMACS_SET_TTY (input_fd, &buf, 0);
309 #endif /* not MSDOS */
310 #endif /* not Apollo */
311 #endif /* not VMS */
312 #endif /* not WINDOWSNT */
313 }
314
315 #ifdef SIGTSTP
316
317 /* Arrange for character C to be read as the next input from
318 the terminal. */
319
320 void
321 #ifdef PROTOTYPES
322 stuff_char (char c)
323 #else
324 stuff_char (c)
325 char c;
326 #endif
327 {
328 if (read_socket_hook)
329 return;
330
331 /* Should perhaps error if in batch mode */
332 #ifdef TIOCSTI
333 ioctl (input_fd, TIOCSTI, &c);
334 #else /* no TIOCSTI */
335 error ("Cannot stuff terminal input characters in this version of Unix");
336 #endif /* no TIOCSTI */
337 }
338
339 #endif /* SIGTSTP */
340 \f
341 void
342 init_baud_rate ()
343 {
344 if (noninteractive)
345 emacs_ospeed = 0;
346 else
347 {
348 #ifdef INIT_BAUD_RATE
349 INIT_BAUD_RATE ();
350 #else
351 #ifdef DOS_NT
352 emacs_ospeed = 15;
353 #else /* not DOS_NT */
354 #ifdef VMS
355 struct sensemode sg;
356
357 SYS$QIOW (0, input_fd, IO$_SENSEMODE, &sg, 0, 0,
358 &sg.class, 12, 0, 0, 0, 0 );
359 emacs_ospeed = sg.xmit_baud;
360 #else /* not VMS */
361 #ifdef HAVE_TERMIOS
362 struct termios sg;
363
364 sg.c_cflag = B9600;
365 tcgetattr (input_fd, &sg);
366 emacs_ospeed = cfgetospeed (&sg);
367 #if defined (USE_GETOBAUD) && defined (getobaud)
368 /* m88k-motorola-sysv3 needs this (ghazi@noc.rutgers.edu) 9/1/94. */
369 if (emacs_ospeed == 0)
370 emacs_ospeed = getobaud (sg.c_cflag);
371 #endif
372 #else /* neither VMS nor TERMIOS */
373 #ifdef HAVE_TERMIO
374 struct termio sg;
375
376 sg.c_cflag = B9600;
377 #ifdef HAVE_TCATTR
378 tcgetattr (input_fd, &sg);
379 #else
380 ioctl (input_fd, TCGETA, &sg);
381 #endif
382 emacs_ospeed = sg.c_cflag & CBAUD;
383 #else /* neither VMS nor TERMIOS nor TERMIO */
384 struct sgttyb sg;
385
386 sg.sg_ospeed = B9600;
387 if (ioctl (input_fd, TIOCGETP, &sg) < 0)
388 abort ();
389 emacs_ospeed = sg.sg_ospeed;
390 #endif /* not HAVE_TERMIO */
391 #endif /* not HAVE_TERMIOS */
392 #endif /* not VMS */
393 #endif /* not DOS_NT */
394 #endif /* not INIT_BAUD_RATE */
395 }
396
397 baud_rate = (emacs_ospeed < sizeof baud_convert / sizeof baud_convert[0]
398 ? baud_convert[emacs_ospeed] : 9600);
399 if (baud_rate == 0)
400 baud_rate = 1200;
401 }
402
403 /*ARGSUSED*/
404 void
405 set_exclusive_use (fd)
406 int fd;
407 {
408 #ifdef FIOCLEX
409 ioctl (fd, FIOCLEX, 0);
410 #endif
411 /* Ok to do nothing if this feature does not exist */
412 }
413 \f
414 #ifndef subprocesses
415
416 wait_without_blocking ()
417 {
418 #ifdef BSD_SYSTEM
419 wait3 (0, WNOHANG | WUNTRACED, 0);
420 #else
421 croak ("wait_without_blocking");
422 #endif
423 synch_process_alive = 0;
424 }
425
426 #endif /* not subprocesses */
427
428 int wait_debugging; /* Set nonzero to make following function work under dbx
429 (at least for bsd). */
430
431 SIGTYPE
432 wait_for_termination_signal ()
433 {}
434
435 /* Wait for subprocess with process id `pid' to terminate and
436 make sure it will get eliminated (not remain forever as a zombie) */
437
438 void
439 wait_for_termination (pid)
440 int pid;
441 {
442 while (1)
443 {
444 #ifdef subprocesses
445 #ifdef VMS
446 int status;
447
448 status = SYS$FORCEX (&pid, 0, 0);
449 break;
450 #else /* not VMS */
451 #if defined (BSD_SYSTEM) || (defined (HPUX) && !defined (HPUX_5))
452 /* Note that kill returns -1 even if the process is just a zombie now.
453 But inevitably a SIGCHLD interrupt should be generated
454 and child_sig will do wait3 and make the process go away. */
455 /* There is some indication that there is a bug involved with
456 termination of subprocesses, perhaps involving a kernel bug too,
457 but no idea what it is. Just as a hunch we signal SIGCHLD to see
458 if that causes the problem to go away or get worse. */
459 sigsetmask (sigmask (SIGCHLD));
460 if (0 > kill (pid, 0))
461 {
462 sigsetmask (SIGEMPTYMASK);
463 kill (getpid (), SIGCHLD);
464 break;
465 }
466 if (wait_debugging)
467 sleep (1);
468 else
469 sigpause (SIGEMPTYMASK);
470 #else /* not BSD_SYSTEM, and not HPUX version >= 6 */
471 #if defined (UNIPLUS)
472 if (0 > kill (pid, 0))
473 break;
474 wait (0);
475 #else /* neither BSD_SYSTEM nor UNIPLUS: random sysV */
476 #ifdef POSIX_SIGNALS /* would this work for GNU/Linux as well? */
477 sigblock (sigmask (SIGCHLD));
478 errno = 0;
479 if (kill (pid, 0) == -1 && errno == ESRCH)
480 {
481 sigunblock (sigmask (SIGCHLD));
482 break;
483 }
484
485 sigsuspend (&empty_mask);
486 #else /* not POSIX_SIGNALS */
487 #ifdef HAVE_SYSV_SIGPAUSE
488 sighold (SIGCHLD);
489 if (0 > kill (pid, 0))
490 {
491 sigrelse (SIGCHLD);
492 break;
493 }
494 sigpause (SIGCHLD);
495 #else /* not HAVE_SYSV_SIGPAUSE */
496 #ifdef WINDOWSNT
497 wait (0);
498 break;
499 #else /* not WINDOWSNT */
500 if (0 > kill (pid, 0))
501 break;
502 /* Using sleep instead of pause avoids timing error.
503 If the inferior dies just before the sleep,
504 we lose just one second. */
505 sleep (1);
506 #endif /* not WINDOWSNT */
507 #endif /* not HAVE_SYSV_SIGPAUSE */
508 #endif /* not POSIX_SIGNALS */
509 #endif /* not UNIPLUS */
510 #endif /* not BSD_SYSTEM, and not HPUX version >= 6 */
511 #endif /* not VMS */
512 #else /* not subprocesses */
513 #if __DJGPP__ > 1
514 break;
515 #else /* not __DJGPP__ > 1 */
516 #ifndef BSD4_1
517 if (kill (pid, 0) < 0)
518 break;
519 wait (0);
520 #else /* BSD4_1 */
521 int status;
522 status = wait (0);
523 if (status == pid || status == -1)
524 break;
525 #endif /* BSD4_1 */
526 #endif /* not __DJGPP__ > 1*/
527 #endif /* not subprocesses */
528 }
529 }
530
531 #ifdef subprocesses
532
533 /*
534 * flush any pending output
535 * (may flush input as well; it does not matter the way we use it)
536 */
537
538 void
539 flush_pending_output (channel)
540 int channel;
541 {
542 #ifdef HAVE_TERMIOS
543 /* If we try this, we get hit with SIGTTIN, because
544 the child's tty belongs to the child's pgrp. */
545 #else
546 #ifdef TCFLSH
547 ioctl (channel, TCFLSH, 1);
548 #else
549 #ifdef TIOCFLUSH
550 int zero = 0;
551 /* 3rd arg should be ignored
552 but some 4.2 kernels actually want the address of an int
553 and nonzero means something different. */
554 ioctl (channel, TIOCFLUSH, &zero);
555 #endif
556 #endif
557 #endif
558 }
559 \f
560 #ifndef VMS
561 /* Set up the terminal at the other end of a pseudo-terminal that
562 we will be controlling an inferior through.
563 It should not echo or do line-editing, since that is done
564 in Emacs. No padding needed for insertion into an Emacs buffer. */
565
566 void
567 child_setup_tty (out)
568 int out;
569 {
570 #ifndef DOS_NT
571 struct emacs_tty s;
572
573 EMACS_GET_TTY (out, &s);
574
575 #if defined (HAVE_TERMIO) || defined (HAVE_TERMIOS)
576 s.main.c_oflag |= OPOST; /* Enable output postprocessing */
577 s.main.c_oflag &= ~ONLCR; /* Disable map of NL to CR-NL on output */
578 #ifdef NLDLY
579 s.main.c_oflag &= ~(NLDLY|CRDLY|TABDLY|BSDLY|VTDLY|FFDLY);
580 /* No output delays */
581 #endif
582 s.main.c_lflag &= ~ECHO; /* Disable echo */
583 s.main.c_lflag |= ISIG; /* Enable signals */
584 #if 0 /* This causes bugs in (for instance) telnet to certain sites. */
585 s.main.c_iflag &= ~ICRNL; /* Disable map of CR to NL on input */
586 #ifdef INLCR /* Just being cautious, since I can't check how
587 widespread INLCR is--rms. */
588 s.main.c_iflag &= ~INLCR; /* Disable map of NL to CR on input */
589 #endif
590 #endif
591 #ifdef IUCLC
592 s.main.c_iflag &= ~IUCLC; /* Disable downcasing on input. */
593 #endif
594 #ifdef ISTRIP
595 s.main.c_iflag &= ~ISTRIP; /* don't strip 8th bit on input */
596 #endif
597 #ifdef OLCUC
598 s.main.c_oflag &= ~OLCUC; /* Disable upcasing on output. */
599 #endif
600 s.main.c_oflag &= ~TAB3; /* Disable tab expansion */
601 s.main.c_cflag = (s.main.c_cflag & ~CSIZE) | CS8; /* Don't strip 8th bit */
602 #if 0
603 /* Said to be unnecessary: */
604 s.main.c_cc[VMIN] = 1; /* minimum number of characters to accept */
605 s.main.c_cc[VTIME] = 0; /* wait forever for at least 1 character */
606 #endif
607
608 s.main.c_lflag |= ICANON; /* Enable erase/kill and eof processing */
609 s.main.c_cc[VEOF] = 04; /* insure that EOF is Control-D */
610 s.main.c_cc[VERASE] = CDISABLE; /* disable erase processing */
611 s.main.c_cc[VKILL] = CDISABLE; /* disable kill processing */
612
613 #ifdef HPUX
614 s.main.c_cflag = (s.main.c_cflag & ~CBAUD) | B9600; /* baud rate sanity */
615 #endif /* HPUX */
616
617 #ifdef AIX
618 /* AIX enhanced edit loses NULs, so disable it */
619 #ifndef IBMR2AIX
620 s.main.c_line = 0;
621 s.main.c_iflag &= ~ASCEDIT;
622 #endif
623 /* Also, PTY overloads NUL and BREAK.
624 don't ignore break, but don't signal either, so it looks like NUL. */
625 s.main.c_iflag &= ~IGNBRK;
626 s.main.c_iflag &= ~BRKINT;
627 /* QUIT and INTR work better as signals, so disable character forms */
628 s.main.c_cc[VINTR] = 0377;
629 #ifdef SIGNALS_VIA_CHARACTERS
630 /* the QUIT and INTR character are used in process_send_signal
631 so set them here to something useful. */
632 if (s.main.c_cc[VQUIT] == 0377)
633 s.main.c_cc[VQUIT] = '\\'&037; /* Control-\ */
634 if (s.main.c_cc[VINTR] == 0377)
635 s.main.c_cc[VINTR] = 'C'&037; /* Control-C */
636 #else /* no TIOCGPGRP or no TIOCGLTC or no TIOCGETC */
637 /* QUIT and INTR work better as signals, so disable character forms */
638 s.main.c_cc[VQUIT] = 0377;
639 s.main.c_cc[VINTR] = 0377;
640 s.main.c_lflag &= ~ISIG;
641 #endif /* no TIOCGPGRP or no TIOCGLTC or no TIOCGETC */
642 s.main.c_cc[VEOL] = 0377;
643 s.main.c_cflag = (s.main.c_cflag & ~CBAUD) | B9600; /* baud rate sanity */
644 #endif /* AIX */
645
646 #else /* not HAVE_TERMIO */
647
648 s.main.sg_flags &= ~(ECHO | CRMOD | ANYP | ALLDELAY | RAW | LCASE
649 | CBREAK | TANDEM);
650 s.main.sg_flags |= LPASS8;
651 s.main.sg_erase = 0377;
652 s.main.sg_kill = 0377;
653 s.lmode = LLITOUT | s.lmode; /* Don't strip 8th bit */
654
655 #endif /* not HAVE_TERMIO */
656
657 EMACS_SET_TTY (out, &s, 0);
658
659 #ifdef BSD4_1
660 if (interrupt_input)
661 reset_sigio ();
662 #endif /* BSD4_1 */
663 #ifdef RTU
664 {
665 int zero = 0;
666 ioctl (out, FIOASYNC, &zero);
667 }
668 #endif /* RTU */
669 #endif /* not DOS_NT */
670 }
671 #endif /* not VMS */
672
673 #endif /* subprocesses */
674 \f
675 /* Record a signal code and the handler for it. */
676 struct save_signal
677 {
678 int code;
679 SIGTYPE (*handler) P_ ((int));
680 };
681
682 static void save_signal_handlers P_ ((struct save_signal *));
683 static void restore_signal_handlers P_ ((struct save_signal *));
684
685 /* Suspend the Emacs process; give terminal to its superior. */
686
687 void
688 sys_suspend ()
689 {
690 #ifdef VMS
691 /* "Foster" parentage allows emacs to return to a subprocess that attached
692 to the current emacs as a cheaper than starting a whole new process. This
693 is set up by KEPTEDITOR.COM. */
694 unsigned long parent_id, foster_parent_id;
695 char *fpid_string;
696
697 fpid_string = getenv ("EMACS_PARENT_PID");
698 if (fpid_string != NULL)
699 {
700 sscanf (fpid_string, "%x", &foster_parent_id);
701 if (foster_parent_id != 0)
702 parent_id = foster_parent_id;
703 else
704 parent_id = getppid ();
705 }
706 else
707 parent_id = getppid ();
708
709 xfree (fpid_string); /* On VMS, this was malloc'd */
710
711 if (parent_id && parent_id != 0xffffffff)
712 {
713 SIGTYPE (*oldsig)() = (int) signal (SIGINT, SIG_IGN);
714 int status = LIB$ATTACH (&parent_id) & 1;
715 signal (SIGINT, oldsig);
716 return status;
717 }
718 else
719 {
720 struct {
721 int l;
722 char *a;
723 } d_prompt;
724 d_prompt.l = sizeof ("Emacs: "); /* Our special prompt */
725 d_prompt.a = "Emacs: "; /* Just a reminder */
726 LIB$SPAWN (0, 0, 0, 0, 0, 0, 0, 0, 0, 0, &d_prompt, 0);
727 return 1;
728 }
729 return -1;
730 #else
731 #if defined (SIGTSTP) && !defined (MSDOS)
732
733 {
734 int pgrp = EMACS_GETPGRP (0);
735 EMACS_KILLPG (pgrp, SIGTSTP);
736 }
737
738 #else /* No SIGTSTP */
739 #ifdef USG_JOBCTRL /* If you don't know what this is don't mess with it */
740 ptrace (0, 0, 0, 0); /* set for ptrace - caught by csh */
741 kill (getpid (), SIGQUIT);
742
743 #else /* No SIGTSTP or USG_JOBCTRL */
744
745 /* On a system where suspending is not implemented,
746 instead fork a subshell and let it talk directly to the terminal
747 while we wait. */
748 sys_subshell ();
749
750 #endif /* no USG_JOBCTRL */
751 #endif /* no SIGTSTP */
752 #endif /* not VMS */
753 }
754
755 /* Fork a subshell. */
756
757 #ifndef MAC_OS8
758 void
759 sys_subshell ()
760 {
761 #ifndef VMS
762 #ifdef DOS_NT /* Demacs 1.1.2 91/10/20 Manabu Higashida */
763 int st;
764 char oldwd[MAXPATHLEN+1]; /* Fixed length is safe on MSDOS. */
765 #endif
766 int pid;
767 struct save_signal saved_handlers[5];
768 Lisp_Object dir;
769 unsigned char *str = 0;
770 int len;
771
772 saved_handlers[0].code = SIGINT;
773 saved_handlers[1].code = SIGQUIT;
774 saved_handlers[2].code = SIGTERM;
775 #ifdef SIGIO
776 saved_handlers[3].code = SIGIO;
777 saved_handlers[4].code = 0;
778 #else
779 saved_handlers[3].code = 0;
780 #endif
781
782 /* Mentioning current_buffer->buffer would mean including buffer.h,
783 which somehow wedges the hp compiler. So instead... */
784
785 dir = intern ("default-directory");
786 if (NILP (Fboundp (dir)))
787 goto xyzzy;
788 dir = Fsymbol_value (dir);
789 if (!STRINGP (dir))
790 goto xyzzy;
791
792 dir = expand_and_dir_to_file (Funhandled_file_name_directory (dir), Qnil);
793 str = (unsigned char *) alloca (SCHARS (dir) + 2);
794 len = SCHARS (dir);
795 bcopy (SDATA (dir), str, len);
796 if (str[len - 1] != '/') str[len++] = '/';
797 str[len] = 0;
798 xyzzy:
799
800 #ifdef DOS_NT
801 pid = 0;
802 #if __DJGPP__ > 1
803 save_signal_handlers (saved_handlers);
804 synch_process_alive = 1;
805 #endif /* __DJGPP__ > 1 */
806 #else
807 pid = vfork ();
808 if (pid == -1)
809 error ("Can't spawn subshell");
810 #endif
811
812 if (pid == 0)
813 {
814 char *sh = 0;
815
816 #ifdef DOS_NT /* MW, Aug 1993 */
817 getwd (oldwd);
818 if (sh == 0)
819 sh = (char *) egetenv ("SUSPEND"); /* KFS, 1994-12-14 */
820 #endif
821 if (sh == 0)
822 sh = (char *) egetenv ("SHELL");
823 if (sh == 0)
824 sh = "sh";
825
826 /* Use our buffer's default directory for the subshell. */
827 if (str)
828 chdir ((char *) str);
829
830 #ifdef subprocesses
831 close_process_descs (); /* Close Emacs's pipes/ptys */
832 #endif
833
834 #ifdef SET_EMACS_PRIORITY
835 {
836 extern EMACS_INT emacs_priority;
837
838 if (emacs_priority < 0)
839 nice (-emacs_priority);
840 }
841 #endif
842
843 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */
844 {
845 char *epwd = getenv ("PWD");
846 char old_pwd[MAXPATHLEN+1+4];
847
848 /* If PWD is set, pass it with corrected value. */
849 if (epwd)
850 {
851 strcpy (old_pwd, epwd);
852 if (str[len - 1] == '/')
853 str[len - 1] = '\0';
854 setenv ("PWD", str, 1);
855 }
856 st = system (sh);
857 chdir (oldwd);
858 if (epwd)
859 putenv (old_pwd); /* restore previous value */
860 }
861 #if 0 /* This is also reported if last command executed in subshell failed, KFS */
862 if (st)
863 report_file_error ("Can't execute subshell", Fcons (build_string (sh), Qnil));
864 #endif
865 #else /* not MSDOS */
866 #ifdef WINDOWSNT
867 /* Waits for process completion */
868 pid = _spawnlp (_P_WAIT, sh, sh, NULL);
869 chdir (oldwd);
870 if (pid == -1)
871 write (1, "Can't execute subshell", 22);
872 #else /* not WINDOWSNT */
873 execlp (sh, sh, 0);
874 write (1, "Can't execute subshell", 22);
875 _exit (1);
876 #endif /* not WINDOWSNT */
877 #endif /* not MSDOS */
878 }
879
880 /* Do this now if we did not do it before. */
881 #if !defined (MSDOS) || __DJGPP__ == 1
882 save_signal_handlers (saved_handlers);
883 synch_process_alive = 1;
884 #endif
885
886 #ifndef DOS_NT
887 wait_for_termination (pid);
888 #endif
889 restore_signal_handlers (saved_handlers);
890 synch_process_alive = 0;
891 #endif /* !VMS */
892 }
893 #endif /* !MAC_OS8 */
894
895 static void
896 save_signal_handlers (saved_handlers)
897 struct save_signal *saved_handlers;
898 {
899 while (saved_handlers->code)
900 {
901 saved_handlers->handler
902 = (SIGTYPE (*) P_ ((int))) signal (saved_handlers->code, SIG_IGN);
903 saved_handlers++;
904 }
905 }
906
907 static void
908 restore_signal_handlers (saved_handlers)
909 struct save_signal *saved_handlers;
910 {
911 while (saved_handlers->code)
912 {
913 signal (saved_handlers->code, saved_handlers->handler);
914 saved_handlers++;
915 }
916 }
917 \f
918 #ifdef F_SETFL
919
920 int old_fcntl_flags;
921
922 void
923 init_sigio (fd)
924 int fd;
925 {
926 #ifdef FASYNC
927 old_fcntl_flags = fcntl (fd, F_GETFL, 0) & ~FASYNC;
928 fcntl (fd, F_SETFL, old_fcntl_flags | FASYNC);
929 #endif
930 interrupts_deferred = 0;
931 }
932
933 void
934 reset_sigio ()
935 {
936 unrequest_sigio ();
937 }
938
939 #ifdef FASYNC /* F_SETFL does not imply existence of FASYNC */
940
941 void
942 request_sigio ()
943 {
944 if (read_socket_hook)
945 return;
946
947 #ifdef SIGWINCH
948 sigunblock (sigmask (SIGWINCH));
949 #endif
950 fcntl (input_fd, F_SETFL, old_fcntl_flags | FASYNC);
951
952 interrupts_deferred = 0;
953 }
954
955 void
956 unrequest_sigio ()
957 {
958 if (read_socket_hook)
959 return;
960
961 #ifdef SIGWINCH
962 sigblock (sigmask (SIGWINCH));
963 #endif
964 fcntl (input_fd, F_SETFL, old_fcntl_flags);
965 interrupts_deferred = 1;
966 }
967
968 #else /* no FASYNC */
969 #ifdef STRIDE /* Stride doesn't have FASYNC - use FIOASYNC */
970
971 void
972 request_sigio ()
973 {
974 int on = 1;
975
976 if (read_socket_hook)
977 return;
978
979 ioctl (input_fd, FIOASYNC, &on);
980 interrupts_deferred = 0;
981 }
982
983 void
984 unrequest_sigio ()
985 {
986 int off = 0;
987
988 if (read_socket_hook)
989 return;
990
991 ioctl (input_fd, FIOASYNC, &off);
992 interrupts_deferred = 1;
993 }
994
995 #else /* not FASYNC, not STRIDE */
996
997 #ifdef _CX_UX
998
999 #include <termios.h>
1000
1001 void
1002 request_sigio ()
1003 {
1004 int on = 1;
1005 sigset_t st;
1006
1007 if (read_socket_hook)
1008 return;
1009
1010 sigemptyset (&st);
1011 sigaddset (&st, SIGIO);
1012 ioctl (input_fd, FIOASYNC, &on);
1013 interrupts_deferred = 0;
1014 sigprocmask (SIG_UNBLOCK, &st, (sigset_t *)0);
1015 }
1016
1017 void
1018 unrequest_sigio ()
1019 {
1020 int off = 0;
1021
1022 if (read_socket_hook)
1023 return;
1024
1025 ioctl (input_fd, FIOASYNC, &off);
1026 interrupts_deferred = 1;
1027 }
1028
1029 #else /* ! _CX_UX */
1030 #ifndef MSDOS
1031
1032 void
1033 request_sigio ()
1034 {
1035 if (read_socket_hook)
1036 return;
1037
1038 croak ("request_sigio");
1039 }
1040
1041 void
1042 unrequest_sigio ()
1043 {
1044 if (read_socket_hook)
1045 return;
1046
1047 croak ("unrequest_sigio");
1048 }
1049
1050 #endif /* MSDOS */
1051 #endif /* _CX_UX */
1052 #endif /* STRIDE */
1053 #endif /* FASYNC */
1054 #endif /* F_SETFL */
1055 \f
1056 /* Saving and restoring the process group of Emacs's terminal. */
1057
1058 #ifdef BSD_PGRPS
1059
1060 /* The process group of which Emacs was a member when it initially
1061 started.
1062
1063 If Emacs was in its own process group (i.e. inherited_pgroup ==
1064 getpid ()), then we know we're running under a shell with job
1065 control (Emacs would never be run as part of a pipeline).
1066 Everything is fine.
1067
1068 If Emacs was not in its own process group, then we know we're
1069 running under a shell (or a caller) that doesn't know how to
1070 separate itself from Emacs (like sh). Emacs must be in its own
1071 process group in order to receive SIGIO correctly. In this
1072 situation, we put ourselves in our own pgroup, forcibly set the
1073 tty's pgroup to our pgroup, and make sure to restore and reinstate
1074 the tty's pgroup just like any other terminal setting. If
1075 inherited_group was not the tty's pgroup, then we'll get a
1076 SIGTTmumble when we try to change the tty's pgroup, and a CONT if
1077 it goes foreground in the future, which is what should happen. */
1078 int inherited_pgroup;
1079
1080 /* Split off the foreground process group to Emacs alone.
1081 When we are in the foreground, but not started in our own process
1082 group, redirect the TTY to point to our own process group. We need
1083 to be in our own process group to receive SIGIO properly. */
1084 void
1085 narrow_foreground_group ()
1086 {
1087 int me = getpid ();
1088
1089 setpgrp (0, inherited_pgroup);
1090 if (inherited_pgroup != me)
1091 EMACS_SET_TTY_PGRP (input_fd, &me);
1092 setpgrp (0, me);
1093 }
1094
1095 /* Set the tty to our original foreground group. */
1096 void
1097 widen_foreground_group ()
1098 {
1099 if (inherited_pgroup != getpid ())
1100 EMACS_SET_TTY_PGRP (input_fd, &inherited_pgroup);
1101 setpgrp (0, inherited_pgroup);
1102 }
1103
1104 #endif /* BSD_PGRPS */
1105 \f
1106 /* Getting and setting emacs_tty structures. */
1107
1108 /* Set *TC to the parameters associated with the terminal FD.
1109 Return zero if all's well, or -1 if we ran into an error we
1110 couldn't deal with. */
1111 int
1112 emacs_get_tty (fd, settings)
1113 int fd;
1114 struct emacs_tty *settings;
1115 {
1116 /* Retrieve the primary parameters - baud rate, character size, etcetera. */
1117 #ifdef HAVE_TCATTR
1118 /* We have those nifty POSIX tcmumbleattr functions. */
1119 bzero (&settings->main, sizeof (settings->main));
1120 if (tcgetattr (fd, &settings->main) < 0)
1121 return -1;
1122
1123 #else
1124 #ifdef HAVE_TERMIO
1125 /* The SYSV-style interface? */
1126 if (ioctl (fd, TCGETA, &settings->main) < 0)
1127 return -1;
1128
1129 #else
1130 #ifdef VMS
1131 /* Vehemently Monstrous System? :-) */
1132 if (! (SYS$QIOW (0, fd, IO$_SENSEMODE, settings, 0, 0,
1133 &settings->main.class, 12, 0, 0, 0, 0)
1134 & 1))
1135 return -1;
1136
1137 #else
1138 #ifndef DOS_NT
1139 /* I give up - I hope you have the BSD ioctls. */
1140 if (ioctl (fd, TIOCGETP, &settings->main) < 0)
1141 return -1;
1142 #endif /* not DOS_NT */
1143 #endif
1144 #endif
1145 #endif
1146
1147 /* Suivant - Do we have to get struct ltchars data? */
1148 #ifdef HAVE_LTCHARS
1149 if (ioctl (fd, TIOCGLTC, &settings->ltchars) < 0)
1150 return -1;
1151 #endif
1152
1153 /* How about a struct tchars and a wordful of lmode bits? */
1154 #ifdef HAVE_TCHARS
1155 if (ioctl (fd, TIOCGETC, &settings->tchars) < 0
1156 || ioctl (fd, TIOCLGET, &settings->lmode) < 0)
1157 return -1;
1158 #endif
1159
1160 /* We have survived the tempest. */
1161 return 0;
1162 }
1163
1164
1165 /* Set the parameters of the tty on FD according to the contents of
1166 *SETTINGS. If FLUSHP is non-zero, we discard input.
1167 Return 0 if all went well, and -1 if anything failed. */
1168
1169 int
1170 emacs_set_tty (fd, settings, flushp)
1171 int fd;
1172 struct emacs_tty *settings;
1173 int flushp;
1174 {
1175 /* Set the primary parameters - baud rate, character size, etcetera. */
1176 #ifdef HAVE_TCATTR
1177 int i;
1178 /* We have those nifty POSIX tcmumbleattr functions.
1179 William J. Smith <wjs@wiis.wang.com> writes:
1180 "POSIX 1003.1 defines tcsetattr to return success if it was
1181 able to perform any of the requested actions, even if some
1182 of the requested actions could not be performed.
1183 We must read settings back to ensure tty setup properly.
1184 AIX requires this to keep tty from hanging occasionally." */
1185 /* This make sure that we don't loop indefinitely in here. */
1186 for (i = 0 ; i < 10 ; i++)
1187 if (tcsetattr (fd, flushp ? TCSAFLUSH : TCSADRAIN, &settings->main) < 0)
1188 {
1189 if (errno == EINTR)
1190 continue;
1191 else
1192 return -1;
1193 }
1194 else
1195 {
1196 struct termios new;
1197
1198 bzero (&new, sizeof (new));
1199 /* Get the current settings, and see if they're what we asked for. */
1200 tcgetattr (fd, &new);
1201 /* We cannot use memcmp on the whole structure here because under
1202 * aix386 the termios structure has some reserved field that may
1203 * not be filled in.
1204 */
1205 if ( new.c_iflag == settings->main.c_iflag
1206 && new.c_oflag == settings->main.c_oflag
1207 && new.c_cflag == settings->main.c_cflag
1208 && new.c_lflag == settings->main.c_lflag
1209 && memcmp (new.c_cc, settings->main.c_cc, NCCS) == 0)
1210 break;
1211 else
1212 continue;
1213 }
1214
1215 #else
1216 #ifdef HAVE_TERMIO
1217 /* The SYSV-style interface? */
1218 if (ioctl (fd, flushp ? TCSETAF : TCSETAW, &settings->main) < 0)
1219 return -1;
1220
1221 #else
1222 #ifdef VMS
1223 /* Vehemently Monstrous System? :-) */
1224 if (! (SYS$QIOW (0, fd, IO$_SETMODE, &input_iosb, 0, 0,
1225 &settings->main.class, 12, 0, 0, 0, 0)
1226 & 1))
1227 return -1;
1228
1229 #else
1230 #ifndef DOS_NT
1231 /* I give up - I hope you have the BSD ioctls. */
1232 if (ioctl (fd, (flushp) ? TIOCSETP : TIOCSETN, &settings->main) < 0)
1233 return -1;
1234 #endif /* not DOS_NT */
1235
1236 #endif
1237 #endif
1238 #endif
1239
1240 /* Suivant - Do we have to get struct ltchars data? */
1241 #ifdef HAVE_LTCHARS
1242 if (ioctl (fd, TIOCSLTC, &settings->ltchars) < 0)
1243 return -1;
1244 #endif
1245
1246 /* How about a struct tchars and a wordful of lmode bits? */
1247 #ifdef HAVE_TCHARS
1248 if (ioctl (fd, TIOCSETC, &settings->tchars) < 0
1249 || ioctl (fd, TIOCLSET, &settings->lmode) < 0)
1250 return -1;
1251 #endif
1252
1253 /* We have survived the tempest. */
1254 return 0;
1255 }
1256
1257 \f
1258 /* The initial tty mode bits */
1259 struct emacs_tty old_tty;
1260
1261 /* 1 if we have been through init_sys_modes. */
1262 int term_initted;
1263
1264 /* 1 if outer tty status has been recorded. */
1265 int old_tty_valid;
1266
1267 #ifdef BSD4_1
1268 /* BSD 4.1 needs to keep track of the lmode bits in order to start
1269 sigio. */
1270 int lmode;
1271 #endif
1272
1273 #ifndef F_SETOWN_BUG
1274 #ifdef F_SETOWN
1275 int old_fcntl_owner;
1276 #endif /* F_SETOWN */
1277 #endif /* F_SETOWN_BUG */
1278
1279 /* This may also be defined in stdio,
1280 but if so, this does no harm,
1281 and using the same name avoids wasting the other one's space. */
1282
1283 #ifdef nec_ews_svr4
1284 extern char *_sobuf ;
1285 #else
1286 #if defined (USG) || defined (DGUX)
1287 unsigned char _sobuf[BUFSIZ+8];
1288 #else
1289 char _sobuf[BUFSIZ];
1290 #endif
1291 #endif
1292
1293 #ifdef HAVE_LTCHARS
1294 static struct ltchars new_ltchars = {-1,-1,-1,-1,-1,-1};
1295 #endif
1296 #ifdef HAVE_TCHARS
1297 static struct tchars new_tchars = {-1,-1,-1,-1,-1,-1};
1298 #endif
1299
1300 void
1301 init_sys_modes ()
1302 {
1303 struct emacs_tty tty;
1304
1305 #ifdef MAC_OS8
1306 /* cus-start.el complains if delete-exited-processes is not defined */
1307 #ifndef subprocesses
1308 DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes,
1309 doc: /* *Non-nil means delete processes immediately when they exit.
1310 nil means don't delete them until `list-processes' is run. */);
1311 delete_exited_processes = 0;
1312 #endif
1313 #endif /* MAC_OS8 */
1314
1315 #ifdef VMS
1316 #if 0
1317 static int oob_chars[2] = {0, 1 << 7}; /* catch C-g's */
1318 extern int (*interrupt_signal) ();
1319 #endif
1320 #endif
1321
1322 Vtty_erase_char = Qnil;
1323
1324 if (noninteractive)
1325 return;
1326
1327 #ifdef VMS
1328 if (!input_ef)
1329 input_ef = get_kbd_event_flag ();
1330 /* LIB$GET_EF (&input_ef); */
1331 SYS$CLREF (input_ef);
1332 waiting_for_ast = 0;
1333 if (!timer_ef)
1334 timer_ef = get_timer_event_flag ();
1335 /* LIB$GET_EF (&timer_ef); */
1336 SYS$CLREF (timer_ef);
1337 #if 0
1338 if (!process_ef)
1339 {
1340 LIB$GET_EF (&process_ef);
1341 SYS$CLREF (process_ef);
1342 }
1343 if (input_ef / 32 != process_ef / 32)
1344 croak ("Input and process event flags in different clusters.");
1345 #endif
1346 if (input_ef / 32 != timer_ef / 32)
1347 croak ("Input and timer event flags in different clusters.");
1348 #if 0
1349 input_eflist = ((unsigned) 1 << (input_ef % 32)) |
1350 ((unsigned) 1 << (process_ef % 32));
1351 #endif
1352 timer_eflist = ((unsigned) 1 << (input_ef % 32)) |
1353 ((unsigned) 1 << (timer_ef % 32));
1354 #ifndef VMS4_4
1355 sys_access_reinit ();
1356 #endif
1357 #endif /* not VMS */
1358
1359 #ifdef BSD_PGRPS
1360 if (! read_socket_hook && EQ (Vwindow_system, Qnil))
1361 narrow_foreground_group ();
1362 #endif
1363
1364 #ifdef HAVE_WINDOW_SYSTEM
1365 /* Emacs' window system on MSDOG uses the `internal terminal' and therefore
1366 needs the initialization code below. */
1367 if (!read_socket_hook && EQ (Vwindow_system, Qnil))
1368 #endif
1369 {
1370 EMACS_GET_TTY (input_fd, &old_tty);
1371
1372 old_tty_valid = 1;
1373
1374 tty = old_tty;
1375
1376 #if defined (HAVE_TERMIO) || defined (HAVE_TERMIOS)
1377 XSETINT (Vtty_erase_char, old_tty.main.c_cc[VERASE]);
1378
1379 #ifdef DGUX
1380 /* This allows meta to be sent on 8th bit. */
1381 tty.main.c_iflag &= ~INPCK; /* don't check input for parity */
1382 #endif
1383 tty.main.c_iflag |= (IGNBRK); /* Ignore break condition */
1384 tty.main.c_iflag &= ~ICRNL; /* Disable map of CR to NL on input */
1385 #ifdef INLCR /* I'm just being cautious,
1386 since I can't check how widespread INLCR is--rms. */
1387 tty.main.c_iflag &= ~INLCR; /* Disable map of NL to CR on input */
1388 #endif
1389 #ifdef ISTRIP
1390 tty.main.c_iflag &= ~ISTRIP; /* don't strip 8th bit on input */
1391 #endif
1392 tty.main.c_lflag &= ~ECHO; /* Disable echo */
1393 tty.main.c_lflag &= ~ICANON; /* Disable erase/kill processing */
1394 #ifdef IEXTEN
1395 tty.main.c_lflag &= ~IEXTEN; /* Disable other editing characters. */
1396 #endif
1397 tty.main.c_lflag |= ISIG; /* Enable signals */
1398 if (flow_control)
1399 {
1400 tty.main.c_iflag |= IXON; /* Enable start/stop output control */
1401 #ifdef IXANY
1402 tty.main.c_iflag &= ~IXANY;
1403 #endif /* IXANY */
1404 }
1405 else
1406 tty.main.c_iflag &= ~IXON; /* Disable start/stop output control */
1407 tty.main.c_oflag &= ~ONLCR; /* Disable map of NL to CR-NL
1408 on output */
1409 tty.main.c_oflag &= ~TAB3; /* Disable tab expansion */
1410 #ifdef CS8
1411 if (meta_key)
1412 {
1413 tty.main.c_cflag |= CS8; /* allow 8th bit on input */
1414 tty.main.c_cflag &= ~PARENB;/* Don't check parity */
1415 }
1416 #endif
1417 tty.main.c_cc[VINTR] = quit_char; /* C-g (usually) gives SIGINT */
1418 /* Set up C-g for both SIGQUIT and SIGINT.
1419 We don't know which we will get, but we handle both alike
1420 so which one it really gives us does not matter. */
1421 tty.main.c_cc[VQUIT] = quit_char;
1422 tty.main.c_cc[VMIN] = 1; /* Input should wait for at least 1 char */
1423 tty.main.c_cc[VTIME] = 0; /* no matter how long that takes. */
1424 #ifdef VSWTCH
1425 tty.main.c_cc[VSWTCH] = CDISABLE; /* Turn off shell layering use
1426 of C-z */
1427 #endif /* VSWTCH */
1428
1429 #if defined (mips) || defined (HAVE_TCATTR)
1430 #ifdef VSUSP
1431 tty.main.c_cc[VSUSP] = CDISABLE; /* Turn off mips handling of C-z. */
1432 #endif /* VSUSP */
1433 #ifdef V_DSUSP
1434 tty.main.c_cc[V_DSUSP] = CDISABLE; /* Turn off mips handling of C-y. */
1435 #endif /* V_DSUSP */
1436 #ifdef VDSUSP /* Some systems have VDSUSP, some have V_DSUSP. */
1437 tty.main.c_cc[VDSUSP] = CDISABLE;
1438 #endif /* VDSUSP */
1439 #ifdef VLNEXT
1440 tty.main.c_cc[VLNEXT] = CDISABLE;
1441 #endif /* VLNEXT */
1442 #ifdef VREPRINT
1443 tty.main.c_cc[VREPRINT] = CDISABLE;
1444 #endif /* VREPRINT */
1445 #ifdef VWERASE
1446 tty.main.c_cc[VWERASE] = CDISABLE;
1447 #endif /* VWERASE */
1448 #ifdef VDISCARD
1449 tty.main.c_cc[VDISCARD] = CDISABLE;
1450 #endif /* VDISCARD */
1451
1452 if (flow_control)
1453 {
1454 #ifdef VSTART
1455 tty.main.c_cc[VSTART] = '\021';
1456 #endif /* VSTART */
1457 #ifdef VSTOP
1458 tty.main.c_cc[VSTOP] = '\023';
1459 #endif /* VSTOP */
1460 }
1461 else
1462 {
1463 #ifdef VSTART
1464 tty.main.c_cc[VSTART] = CDISABLE;
1465 #endif /* VSTART */
1466 #ifdef VSTOP
1467 tty.main.c_cc[VSTOP] = CDISABLE;
1468 #endif /* VSTOP */
1469 }
1470 #endif /* mips or HAVE_TCATTR */
1471
1472 #ifdef SET_LINE_DISCIPLINE
1473 /* Need to explicitly request TERMIODISC line discipline or
1474 Ultrix's termios does not work correctly. */
1475 tty.main.c_line = SET_LINE_DISCIPLINE;
1476 #endif
1477 #ifdef AIX
1478 #ifndef IBMR2AIX
1479 /* AIX enhanced edit loses NULs, so disable it. */
1480 tty.main.c_line = 0;
1481 tty.main.c_iflag &= ~ASCEDIT;
1482 #else
1483 tty.main.c_cc[VSTRT] = 255;
1484 tty.main.c_cc[VSTOP] = 255;
1485 tty.main.c_cc[VSUSP] = 255;
1486 tty.main.c_cc[VDSUSP] = 255;
1487 #endif /* IBMR2AIX */
1488 if (flow_control)
1489 {
1490 #ifdef VSTART
1491 tty.main.c_cc[VSTART] = '\021';
1492 #endif /* VSTART */
1493 #ifdef VSTOP
1494 tty.main.c_cc[VSTOP] = '\023';
1495 #endif /* VSTOP */
1496 }
1497 /* Also, PTY overloads NUL and BREAK.
1498 don't ignore break, but don't signal either, so it looks like NUL.
1499 This really serves a purpose only if running in an XTERM window
1500 or via TELNET or the like, but does no harm elsewhere. */
1501 tty.main.c_iflag &= ~IGNBRK;
1502 tty.main.c_iflag &= ~BRKINT;
1503 #endif
1504 #else /* if not HAVE_TERMIO */
1505 #ifdef VMS
1506 tty.main.tt_char |= TT$M_NOECHO;
1507 if (meta_key)
1508 tty.main.tt_char |= TT$M_EIGHTBIT;
1509 if (flow_control)
1510 tty.main.tt_char |= TT$M_TTSYNC;
1511 else
1512 tty.main.tt_char &= ~TT$M_TTSYNC;
1513 tty.main.tt2_char |= TT2$M_PASTHRU | TT2$M_XON;
1514 #else /* not VMS (BSD, that is) */
1515 #ifndef DOS_NT
1516 XSETINT (Vtty_erase_char, tty.main.sg_erase);
1517 tty.main.sg_flags &= ~(ECHO | CRMOD | XTABS);
1518 if (meta_key)
1519 tty.main.sg_flags |= ANYP;
1520 tty.main.sg_flags |= interrupt_input ? RAW : CBREAK;
1521 #endif /* not DOS_NT */
1522 #endif /* not VMS (BSD, that is) */
1523 #endif /* not HAVE_TERMIO */
1524
1525 /* If going to use CBREAK mode, we must request C-g to interrupt
1526 and turn off start and stop chars, etc. If not going to use
1527 CBREAK mode, do this anyway so as to turn off local flow
1528 control for user coming over network on 4.2; in this case,
1529 only t_stopc and t_startc really matter. */
1530 #ifndef HAVE_TERMIO
1531 #ifdef HAVE_TCHARS
1532 /* Note: if not using CBREAK mode, it makes no difference how we
1533 set this */
1534 tty.tchars = new_tchars;
1535 tty.tchars.t_intrc = quit_char;
1536 if (flow_control)
1537 {
1538 tty.tchars.t_startc = '\021';
1539 tty.tchars.t_stopc = '\023';
1540 }
1541
1542 tty.lmode = LDECCTQ | LLITOUT | LPASS8 | LNOFLSH | old_tty.lmode;
1543 #ifdef ultrix
1544 /* Under Ultrix 4.2a, leaving this out doesn't seem to hurt
1545 anything, and leaving it in breaks the meta key. Go figure. */
1546 tty.lmode &= ~LLITOUT;
1547 #endif
1548
1549 #ifdef BSD4_1
1550 lmode = tty.lmode;
1551 #endif
1552
1553 #endif /* HAVE_TCHARS */
1554 #endif /* not HAVE_TERMIO */
1555
1556 #ifdef HAVE_LTCHARS
1557 tty.ltchars = new_ltchars;
1558 #endif /* HAVE_LTCHARS */
1559 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida, MW Aug 1993 */
1560 if (!term_initted)
1561 internal_terminal_init ();
1562 dos_ttraw ();
1563 #endif
1564
1565 EMACS_SET_TTY (input_fd, &tty, 0);
1566
1567 /* This code added to insure that, if flow-control is not to be used,
1568 we have an unlocked terminal at the start. */
1569
1570 #ifdef TCXONC
1571 if (!flow_control) ioctl (input_fd, TCXONC, 1);
1572 #endif
1573 #ifndef APOLLO
1574 #ifdef TIOCSTART
1575 if (!flow_control) ioctl (input_fd, TIOCSTART, 0);
1576 #endif
1577 #endif
1578
1579 #if defined (HAVE_TERMIOS) || defined (HPUX9)
1580 #ifdef TCOON
1581 if (!flow_control) tcflow (input_fd, TCOON);
1582 #endif
1583 #endif
1584
1585 #ifdef AIXHFT
1586 hft_init ();
1587 #ifdef IBMR2AIX
1588 {
1589 /* IBM's HFT device usually thinks a ^J should be LF/CR. We need it
1590 to be only LF. This is the way that is done. */
1591 struct termio tty;
1592
1593 if (ioctl (1, HFTGETID, &tty) != -1)
1594 write (1, "\033[20l", 5);
1595 }
1596 #endif
1597 #endif /* AIXHFT */
1598
1599 #ifdef VMS
1600 /* Appears to do nothing when in PASTHRU mode.
1601 SYS$QIOW (0, input_fd, IO$_SETMODE|IO$M_OUTBAND, 0, 0, 0,
1602 interrupt_signal, oob_chars, 0, 0, 0, 0);
1603 */
1604 queue_kbd_input (0);
1605 #endif /* VMS */
1606 }
1607
1608 #ifdef F_SETFL
1609 #ifndef F_SETOWN_BUG
1610 #ifdef F_GETOWN /* F_SETFL does not imply existence of F_GETOWN */
1611 if (interrupt_input
1612 && ! read_socket_hook && EQ (Vwindow_system, Qnil))
1613 {
1614 old_fcntl_owner = fcntl (input_fd, F_GETOWN, 0);
1615 fcntl (input_fd, F_SETOWN, getpid ());
1616 init_sigio (input_fd);
1617 }
1618 #endif /* F_GETOWN */
1619 #endif /* F_SETOWN_BUG */
1620 #endif /* F_SETFL */
1621
1622 #ifdef BSD4_1
1623 if (interrupt_input)
1624 init_sigio (input_fd);
1625 #endif
1626
1627 #ifdef VMS /* VMS sometimes has this symbol but lacks setvbuf. */
1628 #undef _IOFBF
1629 #endif
1630 #ifdef _IOFBF
1631 /* This symbol is defined on recent USG systems.
1632 Someone says without this call USG won't really buffer the file
1633 even with a call to setbuf. */
1634 setvbuf (stdout, (char *) _sobuf, _IOFBF, sizeof _sobuf);
1635 #else
1636 setbuf (stdout, (char *) _sobuf);
1637 #endif
1638 #ifdef HAVE_WINDOW_SYSTEM
1639 /* Emacs' window system on MSDOG uses the `internal terminal' and therefore
1640 needs the initialization code below. */
1641 if (EQ (Vwindow_system, Qnil)
1642 #ifndef WINDOWSNT
1643 /* When running in tty mode on NT/Win95, we have a read_socket
1644 hook, but still need the rest of the initialization code below. */
1645 && (! read_socket_hook)
1646 #endif
1647 )
1648 #endif
1649 set_terminal_modes ();
1650
1651 if (!term_initted
1652 && FRAMEP (Vterminal_frame)
1653 && FRAME_TERMCAP_P (XFRAME (Vterminal_frame)))
1654 init_frame_faces (XFRAME (Vterminal_frame));
1655
1656 if (term_initted && no_redraw_on_reenter)
1657 {
1658 if (display_completed)
1659 direct_output_forward_char (0);
1660 }
1661 else
1662 {
1663 frame_garbaged = 1;
1664 if (FRAMEP (Vterminal_frame))
1665 FRAME_GARBAGED_P (XFRAME (Vterminal_frame)) = 1;
1666 }
1667
1668 term_initted = 1;
1669 }
1670
1671 /* Return nonzero if safe to use tabs in output.
1672 At the time this is called, init_sys_modes has not been done yet. */
1673
1674 int
1675 tabs_safe_p ()
1676 {
1677 struct emacs_tty tty;
1678
1679 EMACS_GET_TTY (input_fd, &tty);
1680 return EMACS_TTY_TABS_OK (&tty);
1681 }
1682 \f
1683 /* Get terminal size from system.
1684 Store number of lines into *HEIGHTP and width into *WIDTHP.
1685 We store 0 if there's no valid information. */
1686
1687 void
1688 get_frame_size (widthp, heightp)
1689 int *widthp, *heightp;
1690 {
1691
1692 #ifdef TIOCGWINSZ
1693
1694 /* BSD-style. */
1695 struct winsize size;
1696
1697 if (ioctl (input_fd, TIOCGWINSZ, &size) == -1)
1698 *widthp = *heightp = 0;
1699 else
1700 {
1701 *widthp = size.ws_col;
1702 *heightp = size.ws_row;
1703 }
1704
1705 #else
1706 #ifdef TIOCGSIZE
1707
1708 /* SunOS - style. */
1709 struct ttysize size;
1710
1711 if (ioctl (input_fd, TIOCGSIZE, &size) == -1)
1712 *widthp = *heightp = 0;
1713 else
1714 {
1715 *widthp = size.ts_cols;
1716 *heightp = size.ts_lines;
1717 }
1718
1719 #else
1720 #ifdef VMS
1721
1722 struct sensemode tty;
1723
1724 SYS$QIOW (0, input_fd, IO$_SENSEMODE, &tty, 0, 0,
1725 &tty.class, 12, 0, 0, 0, 0);
1726 *widthp = tty.scr_wid;
1727 *heightp = tty.scr_len;
1728
1729 #else
1730 #ifdef MSDOS
1731 *widthp = ScreenCols ();
1732 *heightp = ScreenRows ();
1733 #else /* system doesn't know size */
1734 *widthp = 0;
1735 *heightp = 0;
1736 #endif
1737
1738 #endif /* not VMS */
1739 #endif /* not SunOS-style */
1740 #endif /* not BSD-style */
1741 }
1742
1743 /* Set the logical window size associated with descriptor FD
1744 to HEIGHT and WIDTH. This is used mainly with ptys. */
1745
1746 int
1747 set_window_size (fd, height, width)
1748 int fd, height, width;
1749 {
1750 #ifdef TIOCSWINSZ
1751
1752 /* BSD-style. */
1753 struct winsize size;
1754 size.ws_row = height;
1755 size.ws_col = width;
1756
1757 if (ioctl (fd, TIOCSWINSZ, &size) == -1)
1758 return 0; /* error */
1759 else
1760 return 1;
1761
1762 #else
1763 #ifdef TIOCSSIZE
1764
1765 /* SunOS - style. */
1766 struct ttysize size;
1767 size.ts_lines = height;
1768 size.ts_cols = width;
1769
1770 if (ioctl (fd, TIOCGSIZE, &size) == -1)
1771 return 0;
1772 else
1773 return 1;
1774 #else
1775 return -1;
1776 #endif /* not SunOS-style */
1777 #endif /* not BSD-style */
1778 }
1779
1780 \f
1781 /* Prepare the terminal for exiting Emacs; move the cursor to the
1782 bottom of the frame, turn off interrupt-driven I/O, etc. */
1783 void
1784 reset_sys_modes ()
1785 {
1786 struct frame *sf;
1787
1788 if (noninteractive)
1789 {
1790 fflush (stdout);
1791 return;
1792 }
1793 if (!term_initted)
1794 return;
1795 #ifdef HAVE_WINDOW_SYSTEM
1796 /* Emacs' window system on MSDOG uses the `internal terminal' and therefore
1797 needs the clean-up code below. */
1798 if (!EQ (Vwindow_system, Qnil)
1799 #ifndef WINDOWSNT
1800 /* When running in tty mode on NT/Win95, we have a read_socket
1801 hook, but still need the rest of the clean-up code below. */
1802 || read_socket_hook
1803 #endif
1804 )
1805 return;
1806 #endif
1807 sf = SELECTED_FRAME ();
1808 cursor_to (FRAME_LINES (sf) - 1, 0);
1809 clear_end_of_line (FRAME_COLS (sf));
1810 /* clear_end_of_line may move the cursor */
1811 cursor_to (FRAME_LINES (sf) - 1, 0);
1812 #if defined (IBMR2AIX) && defined (AIXHFT)
1813 {
1814 /* HFT devices normally use ^J as a LF/CR. We forced it to
1815 do the LF only. Now, we need to reset it. */
1816 struct termio tty;
1817
1818 if (ioctl (1, HFTGETID, &tty) != -1)
1819 write (1, "\033[20h", 5);
1820 }
1821 #endif
1822
1823 reset_terminal_modes ();
1824 fflush (stdout);
1825 #ifdef BSD_SYSTEM
1826 #ifndef BSD4_1
1827 /* Avoid possible loss of output when changing terminal modes. */
1828 fsync (fileno (stdout));
1829 #endif
1830 #endif
1831
1832 #ifdef F_SETFL
1833 #ifndef F_SETOWN_BUG
1834 #ifdef F_SETOWN /* F_SETFL does not imply existence of F_SETOWN */
1835 if (interrupt_input)
1836 {
1837 reset_sigio ();
1838 fcntl (input_fd, F_SETOWN, old_fcntl_owner);
1839 }
1840 #endif /* F_SETOWN */
1841 #endif /* F_SETOWN_BUG */
1842 #ifdef O_NDELAY
1843 fcntl (input_fd, F_SETFL, fcntl (input_fd, F_GETFL, 0) & ~O_NDELAY);
1844 #endif
1845 #endif /* F_SETFL */
1846 #ifdef BSD4_1
1847 if (interrupt_input)
1848 reset_sigio ();
1849 #endif /* BSD4_1 */
1850
1851 if (old_tty_valid)
1852 while (EMACS_SET_TTY (input_fd, &old_tty, 0) < 0 && errno == EINTR)
1853 ;
1854
1855 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */
1856 dos_ttcooked ();
1857 #endif
1858
1859 #ifdef SET_LINE_DISCIPLINE
1860 /* Ultrix's termios *ignores* any line discipline except TERMIODISC.
1861 A different old line discipline is therefore not restored, yet.
1862 Restore the old line discipline by hand. */
1863 ioctl (0, TIOCSETD, &old_tty.main.c_line);
1864 #endif
1865
1866 #ifdef AIXHFT
1867 hft_reset ();
1868 #endif
1869
1870 #ifdef BSD_PGRPS
1871 widen_foreground_group ();
1872 #endif
1873 }
1874 \f
1875 #ifdef HAVE_PTYS
1876
1877 /* Set up the proper status flags for use of a pty. */
1878
1879 void
1880 setup_pty (fd)
1881 int fd;
1882 {
1883 /* I'm told that TOICREMOTE does not mean control chars
1884 "can't be sent" but rather that they don't have
1885 input-editing or signaling effects.
1886 That should be good, because we have other ways
1887 to do those things in Emacs.
1888 However, telnet mode seems not to work on 4.2.
1889 So TIOCREMOTE is turned off now. */
1890
1891 /* Under hp-ux, if TIOCREMOTE is turned on, some calls
1892 will hang. In particular, the "timeout" feature (which
1893 causes a read to return if there is no data available)
1894 does this. Also it is known that telnet mode will hang
1895 in such a way that Emacs must be stopped (perhaps this
1896 is the same problem).
1897
1898 If TIOCREMOTE is turned off, then there is a bug in
1899 hp-ux which sometimes loses data. Apparently the
1900 code which blocks the master process when the internal
1901 buffer fills up does not work. Other than this,
1902 though, everything else seems to work fine.
1903
1904 Since the latter lossage is more benign, we may as well
1905 lose that way. -- cph */
1906 #ifdef FIONBIO
1907 #if defined(SYSV_PTYS) || defined(UNIX98_PTYS)
1908 {
1909 int on = 1;
1910 ioctl (fd, FIONBIO, &on);
1911 }
1912 #endif
1913 #endif
1914 #ifdef IBMRTAIX
1915 /* On AIX, the parent gets SIGHUP when a pty attached child dies. So, we */
1916 /* ignore SIGHUP once we've started a child on a pty. Note that this may */
1917 /* cause EMACS not to die when it should, i.e., when its own controlling */
1918 /* tty goes away. I've complained to the AIX developers, and they may */
1919 /* change this behavior, but I'm not going to hold my breath. */
1920 signal (SIGHUP, SIG_IGN);
1921 #endif
1922 }
1923 #endif /* HAVE_PTYS */
1924 \f
1925 #ifdef VMS
1926
1927 /* Assigning an input channel is done at the start of Emacs execution.
1928 This is called each time Emacs is resumed, also, but does nothing
1929 because input_chain is no longer zero. */
1930
1931 void
1932 init_vms_input ()
1933 {
1934 int status;
1935
1936 if (input_fd == 0)
1937 {
1938 status = SYS$ASSIGN (&input_dsc, &input_fd, 0, 0);
1939 if (! (status & 1))
1940 LIB$STOP (status);
1941 }
1942 }
1943
1944 /* Deassigning the input channel is done before exiting. */
1945
1946 void
1947 stop_vms_input ()
1948 {
1949 return SYS$DASSGN (input_fd);
1950 }
1951
1952 short input_buffer;
1953
1954 /* Request reading one character into the keyboard buffer.
1955 This is done as soon as the buffer becomes empty. */
1956
1957 void
1958 queue_kbd_input ()
1959 {
1960 int status;
1961 extern kbd_input_ast ();
1962
1963 waiting_for_ast = 0;
1964 stop_input = 0;
1965 status = SYS$QIO (0, input_fd, IO$_READVBLK,
1966 &input_iosb, kbd_input_ast, 1,
1967 &input_buffer, 1, 0, terminator_mask, 0, 0);
1968 }
1969
1970 int input_count;
1971
1972 /* Ast routine that is called when keyboard input comes in
1973 in accord with the SYS$QIO above. */
1974
1975 void
1976 kbd_input_ast ()
1977 {
1978 register int c = -1;
1979 int old_errno = errno;
1980 extern EMACS_TIME *input_available_clear_time;
1981
1982 if (waiting_for_ast)
1983 SYS$SETEF (input_ef);
1984 waiting_for_ast = 0;
1985 input_count++;
1986 #ifdef ASTDEBUG
1987 if (input_count == 25)
1988 exit (1);
1989 printf ("Ast # %d,", input_count);
1990 printf (" iosb = %x, %x, %x, %x",
1991 input_iosb.offset, input_iosb.status, input_iosb.termlen,
1992 input_iosb.term);
1993 #endif
1994 if (input_iosb.offset)
1995 {
1996 c = input_buffer;
1997 #ifdef ASTDEBUG
1998 printf (", char = 0%o", c);
1999 #endif
2000 }
2001 #ifdef ASTDEBUG
2002 printf ("\n");
2003 fflush (stdout);
2004 sleep (1);
2005 #endif
2006 if (! stop_input)
2007 queue_kbd_input ();
2008 if (c >= 0)
2009 {
2010 struct input_event e;
2011 EVENT_INIT (e);
2012
2013 e.kind = ASCII_KEYSTROKE_EVENT;
2014 XSETINT (e.code, c);
2015 e.frame_or_window = selected_frame;
2016 kbd_buffer_store_event (&e);
2017 }
2018 if (input_available_clear_time)
2019 EMACS_SET_SECS_USECS (*input_available_clear_time, 0, 0);
2020 errno = old_errno;
2021 }
2022
2023 /* Wait until there is something in kbd_buffer. */
2024
2025 void
2026 wait_for_kbd_input ()
2027 {
2028 extern int have_process_input, process_exited;
2029
2030 /* If already something, avoid doing system calls. */
2031 if (detect_input_pending ())
2032 {
2033 return;
2034 }
2035 /* Clear a flag, and tell ast routine above to set it. */
2036 SYS$CLREF (input_ef);
2037 waiting_for_ast = 1;
2038 /* Check for timing error: ast happened while we were doing that. */
2039 if (!detect_input_pending ())
2040 {
2041 /* No timing error: wait for flag to be set. */
2042 set_waiting_for_input (0);
2043 SYS$WFLOR (input_ef, input_eflist);
2044 clear_waiting_for_input ();
2045 if (!detect_input_pending ())
2046 /* Check for subprocess input availability */
2047 {
2048 int dsp = have_process_input || process_exited;
2049
2050 SYS$CLREF (process_ef);
2051 if (have_process_input)
2052 process_command_input ();
2053 if (process_exited)
2054 process_exit ();
2055 if (dsp)
2056 {
2057 update_mode_lines++;
2058 prepare_menu_bars ();
2059 redisplay_preserve_echo_area (18);
2060 }
2061 }
2062 }
2063 waiting_for_ast = 0;
2064 }
2065
2066 /* Get rid of any pending QIO, when we are about to suspend
2067 or when we want to throw away pending input.
2068 We wait for a positive sign that the AST routine has run
2069 and therefore there is no I/O request queued when we return.
2070 SYS$SETAST is used to avoid a timing error. */
2071
2072 void
2073 end_kbd_input ()
2074 {
2075 #ifdef ASTDEBUG
2076 printf ("At end_kbd_input.\n");
2077 fflush (stdout);
2078 sleep (1);
2079 #endif
2080 if (LIB$AST_IN_PROG ()) /* Don't wait if suspending from kbd_buffer_store_event! */
2081 {
2082 SYS$CANCEL (input_fd);
2083 return;
2084 }
2085
2086 SYS$SETAST (0);
2087 /* Clear a flag, and tell ast routine above to set it. */
2088 SYS$CLREF (input_ef);
2089 waiting_for_ast = 1;
2090 stop_input = 1;
2091 SYS$CANCEL (input_fd);
2092 SYS$SETAST (1);
2093 SYS$WAITFR (input_ef);
2094 waiting_for_ast = 0;
2095 }
2096
2097 /* Wait for either input available or time interval expiry. */
2098
2099 void
2100 input_wait_timeout (timeval)
2101 int timeval; /* Time to wait, in seconds */
2102 {
2103 int time [2];
2104 static int zero = 0;
2105 static int large = -10000000;
2106
2107 LIB$EMUL (&timeval, &large, &zero, time); /* Convert to VMS format */
2108
2109 /* If already something, avoid doing system calls. */
2110 if (detect_input_pending ())
2111 {
2112 return;
2113 }
2114 /* Clear a flag, and tell ast routine above to set it. */
2115 SYS$CLREF (input_ef);
2116 waiting_for_ast = 1;
2117 /* Check for timing error: ast happened while we were doing that. */
2118 if (!detect_input_pending ())
2119 {
2120 /* No timing error: wait for flag to be set. */
2121 SYS$CANTIM (1, 0);
2122 if (SYS$SETIMR (timer_ef, time, 0, 1) & 1) /* Set timer */
2123 SYS$WFLOR (timer_ef, timer_eflist); /* Wait for timer expiry or input */
2124 }
2125 waiting_for_ast = 0;
2126 }
2127
2128 /* The standard `sleep' routine works some other way
2129 and it stops working if you have ever quit out of it.
2130 This one continues to work. */
2131
2132 sys_sleep (timeval)
2133 int timeval;
2134 {
2135 int time [2];
2136 static int zero = 0;
2137 static int large = -10000000;
2138
2139 LIB$EMUL (&timeval, &large, &zero, time); /* Convert to VMS format */
2140
2141 SYS$CANTIM (1, 0);
2142 if (SYS$SETIMR (timer_ef, time, 0, 1) & 1) /* Set timer */
2143 SYS$WAITFR (timer_ef); /* Wait for timer expiry only */
2144 }
2145
2146 void
2147 init_sigio (fd)
2148 int fd;
2149 {
2150 request_sigio ();
2151 }
2152
2153 reset_sigio ()
2154 {
2155 unrequest_sigio ();
2156 }
2157
2158 void
2159 request_sigio ()
2160 {
2161 croak ("request sigio");
2162 }
2163
2164 void
2165 unrequest_sigio ()
2166 {
2167 croak ("unrequest sigio");
2168 }
2169
2170 #endif /* VMS */
2171 \f
2172 /* Note that VMS compiler won't accept defined (CANNOT_DUMP). */
2173 #ifndef CANNOT_DUMP
2174 #define NEED_STARTS
2175 #endif
2176
2177 #ifndef SYSTEM_MALLOC
2178 #ifndef NEED_STARTS
2179 #define NEED_STARTS
2180 #endif
2181 #endif
2182
2183 #ifdef NEED_STARTS
2184 /* Some systems that cannot dump also cannot implement these. */
2185
2186 /*
2187 * Return the address of the start of the text segment prior to
2188 * doing an unexec. After unexec the return value is undefined.
2189 * See crt0.c for further explanation and _start.
2190 *
2191 */
2192
2193 #if !(defined (__NetBSD__) && defined (__ELF__))
2194 #ifndef HAVE_TEXT_START
2195 char *
2196 start_of_text ()
2197 {
2198 #ifdef TEXT_START
2199 return ((char *) TEXT_START);
2200 #else
2201 #ifdef GOULD
2202 extern csrt ();
2203 return ((char *) csrt);
2204 #else /* not GOULD */
2205 extern int _start ();
2206 return ((char *) _start);
2207 #endif /* GOULD */
2208 #endif /* TEXT_START */
2209 }
2210 #endif /* not HAVE_TEXT_START */
2211 #endif
2212
2213 /*
2214 * Return the address of the start of the data segment prior to
2215 * doing an unexec. After unexec the return value is undefined.
2216 * See crt0.c for further information and definition of data_start.
2217 *
2218 * Apparently, on BSD systems this is etext at startup. On
2219 * USG systems (swapping) this is highly mmu dependent and
2220 * is also dependent on whether or not the program is running
2221 * with shared text. Generally there is a (possibly large)
2222 * gap between end of text and start of data with shared text.
2223 *
2224 * On Uniplus+ systems with shared text, data starts at a
2225 * fixed address. Each port (from a given oem) is generally
2226 * different, and the specific value of the start of data can
2227 * be obtained via the UniPlus+ specific "uvar" system call,
2228 * however the method outlined in crt0.c seems to be more portable.
2229 *
2230 * Probably what will have to happen when a USG unexec is available,
2231 * at least on UniPlus, is temacs will have to be made unshared so
2232 * that text and data are contiguous. Then once loadup is complete,
2233 * unexec will produce a shared executable where the data can be
2234 * at the normal shared text boundary and the startofdata variable
2235 * will be patched by unexec to the correct value.
2236 *
2237 */
2238
2239 #ifndef start_of_data
2240 char *
2241 start_of_data ()
2242 {
2243 #ifdef DATA_START
2244 return ((char *) DATA_START);
2245 #else
2246 #ifdef ORDINARY_LINK
2247 /*
2248 * This is a hack. Since we're not linking crt0.c or pre_crt0.c,
2249 * data_start isn't defined. We take the address of environ, which
2250 * is known to live at or near the start of the system crt0.c, and
2251 * we don't sweat the handful of bytes that might lose.
2252 */
2253 extern char **environ;
2254
2255 return ((char *) &environ);
2256 #else
2257 extern int data_start;
2258 return ((char *) &data_start);
2259 #endif /* ORDINARY_LINK */
2260 #endif /* DATA_START */
2261 }
2262 #endif /* start_of_data */
2263 #endif /* NEED_STARTS (not CANNOT_DUMP or not SYSTEM_MALLOC) */
2264 \f
2265 /* init_system_name sets up the string for the Lisp function
2266 system-name to return. */
2267
2268 #ifdef BSD4_1
2269 #include <whoami.h>
2270 #endif
2271
2272 extern Lisp_Object Vsystem_name;
2273
2274 #ifndef BSD4_1
2275 #ifndef VMS
2276 #ifdef HAVE_SOCKETS
2277 #include <sys/socket.h>
2278 #include <netdb.h>
2279 #endif /* HAVE_SOCKETS */
2280 #endif /* not VMS */
2281 #endif /* not BSD4_1 */
2282
2283 #ifdef TRY_AGAIN
2284 #ifndef HAVE_H_ERRNO
2285 extern int h_errno;
2286 #endif
2287 #endif /* TRY_AGAIN */
2288
2289 void
2290 init_system_name ()
2291 {
2292 #ifdef BSD4_1
2293 Vsystem_name = build_string (sysname);
2294 #else
2295 #ifdef VMS
2296 char *sp, *end;
2297 if ((sp = egetenv ("SYS$NODE")) == 0)
2298 Vsystem_name = build_string ("vax-vms");
2299 else if ((end = index (sp, ':')) == 0)
2300 Vsystem_name = build_string (sp);
2301 else
2302 Vsystem_name = make_string (sp, end - sp);
2303 #else
2304 #ifndef HAVE_GETHOSTNAME
2305 struct utsname uts;
2306 uname (&uts);
2307 Vsystem_name = build_string (uts.nodename);
2308 #else /* HAVE_GETHOSTNAME */
2309 unsigned int hostname_size = 256;
2310 char *hostname = (char *) alloca (hostname_size);
2311
2312 /* Try to get the host name; if the buffer is too short, try
2313 again. Apparently, the only indication gethostname gives of
2314 whether the buffer was large enough is the presence or absence
2315 of a '\0' in the string. Eech. */
2316 for (;;)
2317 {
2318 gethostname (hostname, hostname_size - 1);
2319 hostname[hostname_size - 1] = '\0';
2320
2321 /* Was the buffer large enough for the '\0'? */
2322 if (strlen (hostname) < hostname_size - 1)
2323 break;
2324
2325 hostname_size <<= 1;
2326 hostname = (char *) alloca (hostname_size);
2327 }
2328 #ifdef HAVE_SOCKETS
2329 /* Turn the hostname into the official, fully-qualified hostname.
2330 Don't do this if we're going to dump; this can confuse system
2331 libraries on some machines and make the dumped emacs core dump. */
2332 #ifndef CANNOT_DUMP
2333 if (initialized)
2334 #endif /* not CANNOT_DUMP */
2335 if (! index (hostname, '.'))
2336 {
2337 struct hostent *hp;
2338 int count;
2339 for (count = 0;; count++)
2340 {
2341 #ifdef TRY_AGAIN
2342 h_errno = 0;
2343 #endif
2344 hp = gethostbyname (hostname);
2345 #ifdef TRY_AGAIN
2346 if (! (hp == 0 && h_errno == TRY_AGAIN))
2347 #endif
2348 break;
2349 if (count >= 5)
2350 break;
2351 Fsleep_for (make_number (1), Qnil);
2352 }
2353 if (hp)
2354 {
2355 char *fqdn = (char *) hp->h_name;
2356 #if 0
2357 char *p;
2358 #endif
2359
2360 if (!index (fqdn, '.'))
2361 {
2362 /* We still don't have a fully qualified domain name.
2363 Try to find one in the list of alternate names */
2364 char **alias = hp->h_aliases;
2365 while (*alias && !index (*alias, '.'))
2366 alias++;
2367 if (*alias)
2368 fqdn = *alias;
2369 }
2370 hostname = fqdn;
2371 #if 0
2372 /* Convert the host name to lower case. */
2373 /* Using ctype.h here would introduce a possible locale
2374 dependence that is probably wrong for hostnames. */
2375 p = hostname;
2376 while (*p)
2377 {
2378 if (*p >= 'A' && *p <= 'Z')
2379 *p += 'a' - 'A';
2380 p++;
2381 }
2382 #endif
2383 }
2384 }
2385 #endif /* HAVE_SOCKETS */
2386 /* We used to try using getdomainname here,
2387 but NIIBE Yutaka <gniibe@etl.go.jp> says that
2388 getdomainname gets the NIS/YP domain which often is not the same
2389 as in Internet domain name. */
2390 #if 0 /* Turned off because sysinfo is not really likely to return the
2391 correct Internet domain. */
2392 #if (HAVE_SYSINFO && defined (SI_SRPC_DOMAIN))
2393 if (! index (hostname, '.'))
2394 {
2395 /* The hostname is not fully qualified. Append the domain name. */
2396
2397 int hostlen = strlen (hostname);
2398 int domain_size = 256;
2399
2400 for (;;)
2401 {
2402 char *domain = (char *) alloca (domain_size + 1);
2403 char *fqdn = (char *) alloca (hostlen + 1 + domain_size + 1);
2404 int sys_domain_size = sysinfo (SI_SRPC_DOMAIN, domain, domain_size);
2405 if (sys_domain_size <= 0)
2406 break;
2407 if (domain_size < sys_domain_size)
2408 {
2409 domain_size = sys_domain_size;
2410 continue;
2411 }
2412 strcpy (fqdn, hostname);
2413 if (domain[0] == '.')
2414 strcpy (fqdn + hostlen, domain);
2415 else if (domain[0] != 0)
2416 {
2417 fqdn[hostlen] = '.';
2418 strcpy (fqdn + hostlen + 1, domain);
2419 }
2420 hostname = fqdn;
2421 break;
2422 }
2423 }
2424 #endif /* HAVE_SYSINFO && defined (SI_SRPC_DOMAIN) */
2425 #endif /* 0 */
2426 Vsystem_name = build_string (hostname);
2427 #endif /* HAVE_GETHOSTNAME */
2428 #endif /* VMS */
2429 #endif /* BSD4_1 */
2430 {
2431 unsigned char *p;
2432 for (p = SDATA (Vsystem_name); *p; p++)
2433 if (*p == ' ' || *p == '\t')
2434 *p = '-';
2435 }
2436 }
2437 \f
2438 #ifndef MSDOS
2439 #ifndef VMS
2440 #if !defined (HAVE_SELECT) || defined (BROKEN_SELECT_NON_X)
2441
2442 #include "sysselect.h"
2443 #undef select
2444
2445 #if defined (HAVE_X_WINDOWS) && !defined (HAVE_SELECT)
2446 /* Cause explanatory error message at compile time,
2447 since the select emulation is not good enough for X. */
2448 int *x = &x_windows_lose_if_no_select_system_call;
2449 #endif
2450
2451 /* Emulate as much as select as is possible under 4.1 and needed by Gnu Emacs
2452 * Only checks read descriptors.
2453 */
2454 /* How long to wait between checking fds in select */
2455 #define SELECT_PAUSE 1
2456 int select_alarmed;
2457
2458 /* For longjmp'ing back to read_input_waiting. */
2459
2460 jmp_buf read_alarm_throw;
2461
2462 /* Nonzero if the alarm signal should throw back to read_input_waiting.
2463 The read_socket_hook function sets this to 1 while it is waiting. */
2464
2465 int read_alarm_should_throw;
2466
2467 SIGTYPE
2468 select_alarm ()
2469 {
2470 select_alarmed = 1;
2471 #ifdef BSD4_1
2472 sigrelse (SIGALRM);
2473 #else /* not BSD4_1 */
2474 signal (SIGALRM, SIG_IGN);
2475 #endif /* not BSD4_1 */
2476 if (read_alarm_should_throw)
2477 longjmp (read_alarm_throw, 1);
2478 }
2479
2480 #ifndef WINDOWSNT
2481 /* Only rfds are checked. */
2482 int
2483 sys_select (nfds, rfds, wfds, efds, timeout)
2484 int nfds;
2485 SELECT_TYPE *rfds, *wfds, *efds;
2486 EMACS_TIME *timeout;
2487 {
2488 int ravail = 0;
2489 SELECT_TYPE orfds;
2490 int timeoutval;
2491 int *local_timeout;
2492 extern int proc_buffered_char[];
2493 #ifndef subprocesses
2494 int process_tick = 0, update_tick = 0;
2495 #else
2496 extern int process_tick, update_tick;
2497 #endif
2498 unsigned char buf;
2499
2500 #if defined (HAVE_SELECT) && defined (HAVE_X_WINDOWS)
2501 /* If we're using X, then the native select will work; we only need the
2502 emulation for non-X usage. */
2503 if (!NILP (Vwindow_system))
2504 return select (nfds, rfds, wfds, efds, timeout);
2505 #endif
2506 timeoutval = timeout ? EMACS_SECS (*timeout) : 100000;
2507 local_timeout = &timeoutval;
2508 FD_ZERO (&orfds);
2509 if (rfds)
2510 {
2511 orfds = *rfds;
2512 FD_ZERO (rfds);
2513 }
2514 if (wfds)
2515 FD_ZERO (wfds);
2516 if (efds)
2517 FD_ZERO (efds);
2518
2519 /* If we are looking only for the terminal, with no timeout,
2520 just read it and wait -- that's more efficient. */
2521 if (*local_timeout == 100000 && process_tick == update_tick
2522 && FD_ISSET (0, &orfds))
2523 {
2524 int fd;
2525 for (fd = 1; fd < nfds; ++fd)
2526 if (FD_ISSET (fd, &orfds))
2527 goto hardway;
2528 if (! detect_input_pending ())
2529 read_input_waiting ();
2530 FD_SET (0, rfds);
2531 return 1;
2532 }
2533
2534 hardway:
2535 /* Once a second, till the timer expires, check all the flagged read
2536 * descriptors to see if any input is available. If there is some then
2537 * set the corresponding bit in the return copy of rfds.
2538 */
2539 while (1)
2540 {
2541 register int to_check, fd;
2542
2543 if (rfds)
2544 {
2545 for (to_check = nfds, fd = 0; --to_check >= 0; fd++)
2546 {
2547 if (FD_ISSET (fd, &orfds))
2548 {
2549 int avail = 0, status = 0;
2550
2551 if (fd == 0)
2552 avail = detect_input_pending (); /* Special keyboard handler */
2553 else
2554 {
2555 #ifdef FIONREAD
2556 status = ioctl (fd, FIONREAD, &avail);
2557 #else /* no FIONREAD */
2558 /* Hoping it will return -1 if nothing available
2559 or 0 if all 0 chars requested are read. */
2560 if (proc_buffered_char[fd] >= 0)
2561 avail = 1;
2562 else
2563 {
2564 avail = read (fd, &buf, 1);
2565 if (avail > 0)
2566 proc_buffered_char[fd] = buf;
2567 }
2568 #endif /* no FIONREAD */
2569 }
2570 if (status >= 0 && avail > 0)
2571 {
2572 FD_SET (fd, rfds);
2573 ravail++;
2574 }
2575 }
2576 }
2577 }
2578 if (*local_timeout == 0 || ravail != 0 || process_tick != update_tick)
2579 break;
2580
2581 turn_on_atimers (0);
2582 signal (SIGALRM, select_alarm);
2583 select_alarmed = 0;
2584 alarm (SELECT_PAUSE);
2585
2586 /* Wait for a SIGALRM (or maybe a SIGTINT) */
2587 while (select_alarmed == 0 && *local_timeout != 0
2588 && process_tick == update_tick)
2589 {
2590 /* If we are interested in terminal input,
2591 wait by reading the terminal.
2592 That makes instant wakeup for terminal input at least. */
2593 if (FD_ISSET (0, &orfds))
2594 {
2595 read_input_waiting ();
2596 if (detect_input_pending ())
2597 select_alarmed = 1;
2598 }
2599 else
2600 pause ();
2601 }
2602 (*local_timeout) -= SELECT_PAUSE;
2603
2604 /* Reset the old alarm if there was one. */
2605 turn_on_atimers (1);
2606
2607 if (*local_timeout == 0) /* Stop on timer being cleared */
2608 break;
2609 }
2610 return ravail;
2611 }
2612 #endif /* not WINDOWSNT */
2613
2614 /* Read keyboard input into the standard buffer,
2615 waiting for at least one character. */
2616
2617 /* Make all keyboard buffers much bigger when using a window system. */
2618 #ifdef HAVE_WINDOW_SYSTEM
2619 #define BUFFER_SIZE_FACTOR 16
2620 #else
2621 #define BUFFER_SIZE_FACTOR 1
2622 #endif
2623
2624 void
2625 read_input_waiting ()
2626 {
2627 int nread, i;
2628 extern int quit_char;
2629
2630 if (read_socket_hook)
2631 {
2632 struct input_event buf[256];
2633 for (i = 0; i < 256; i++)
2634 EVENT_INIT (buf[i]);
2635
2636 read_alarm_should_throw = 0;
2637 if (! setjmp (read_alarm_throw))
2638 nread = (*read_socket_hook) (0, buf, 256, 1);
2639 else
2640 nread = -1;
2641
2642 /* Scan the chars for C-g and store them in kbd_buffer. */
2643 for (i = 0; i < nread; i++)
2644 {
2645 kbd_buffer_store_event (&buf[i]);
2646 /* Don't look at input that follows a C-g too closely.
2647 This reduces lossage due to autorepeat on C-g. */
2648 if (buf[i].kind == ASCII_KEYSTROKE_EVENT
2649 && buf[i].code == quit_char)
2650 break;
2651 }
2652 }
2653 else
2654 {
2655 struct input_event e;
2656 char buf[3];
2657 nread = read (fileno (stdin), buf, 1);
2658 EVENT_INIT (e);
2659
2660 /* Scan the chars for C-g and store them in kbd_buffer. */
2661 e.kind = ASCII_KEYSTROKE_EVENT;
2662 e.frame_or_window = selected_frame;
2663 e.modifiers = 0;
2664 for (i = 0; i < nread; i++)
2665 {
2666 /* Convert chars > 0177 to meta events if desired.
2667 We do this under the same conditions that read_avail_input does. */
2668 if (read_socket_hook == 0)
2669 {
2670 /* If the user says she has a meta key, then believe her. */
2671 if (meta_key == 1 && (buf[i] & 0x80))
2672 e.modifiers = meta_modifier;
2673 if (meta_key != 2)
2674 buf[i] &= ~0x80;
2675 }
2676
2677 XSETINT (e.code, buf[i]);
2678 kbd_buffer_store_event (&e);
2679 /* Don't look at input that follows a C-g too closely.
2680 This reduces lossage due to autorepeat on C-g. */
2681 if (buf[i] == quit_char)
2682 break;
2683 }
2684 }
2685 }
2686
2687 #endif /* not HAVE_SELECT */
2688 #endif /* not VMS */
2689 #endif /* not MSDOS */
2690 \f
2691 #ifdef BSD4_1
2692 void
2693 init_sigio (fd)
2694 int fd;
2695 {
2696 if (noninteractive)
2697 return;
2698 lmode = LINTRUP | lmode;
2699 ioctl (fd, TIOCLSET, &lmode);
2700 }
2701
2702 void
2703 reset_sigio ()
2704 {
2705 if (noninteractive)
2706 return;
2707 lmode = ~LINTRUP & lmode;
2708 ioctl (0, TIOCLSET, &lmode);
2709 }
2710
2711 void
2712 request_sigio ()
2713 {
2714 sigrelse (SIGTINT);
2715
2716 interrupts_deferred = 0;
2717 }
2718
2719 void
2720 unrequest_sigio ()
2721 {
2722 sighold (SIGTINT);
2723
2724 interrupts_deferred = 1;
2725 }
2726
2727 /* still inside #ifdef BSD4_1 */
2728 #ifdef subprocesses
2729
2730 int sigheld; /* Mask of held signals */
2731
2732 void
2733 sigholdx (signum)
2734 int signum;
2735 {
2736 sigheld |= sigbit (signum);
2737 sighold (signum);
2738 }
2739
2740 void
2741 sigisheld (signum)
2742 int signum;
2743 {
2744 sigheld |= sigbit (signum);
2745 }
2746
2747 void
2748 sigunhold (signum)
2749 int signum;
2750 {
2751 sigheld &= ~sigbit (signum);
2752 sigrelse (signum);
2753 }
2754
2755 void
2756 sigfree () /* Free all held signals */
2757 {
2758 int i;
2759 for (i = 0; i < NSIG; i++)
2760 if (sigheld & sigbit (i))
2761 sigrelse (i);
2762 sigheld = 0;
2763 }
2764
2765 int
2766 sigbit (i)
2767 {
2768 return 1 << (i - 1);
2769 }
2770 #endif /* subprocesses */
2771 #endif /* BSD4_1 */
2772 \f
2773 /* POSIX signals support - DJB */
2774 /* Anyone with POSIX signals should have ANSI C declarations */
2775
2776 #ifdef POSIX_SIGNALS
2777
2778 sigset_t empty_mask, full_mask;
2779
2780 signal_handler_t
2781 sys_signal (int signal_number, signal_handler_t action)
2782 {
2783 struct sigaction new_action, old_action;
2784 sigemptyset (&new_action.sa_mask);
2785 new_action.sa_handler = action;
2786 #if defined (SA_RESTART) && ! defined (BROKEN_SA_RESTART)
2787 /* Emacs mostly works better with restartable system services. If this
2788 flag exists, we probably want to turn it on here.
2789 However, on some systems this resets the timeout of `select'
2790 which means that `select' never finishes if it keeps getting signals.
2791 BROKEN_SA_RESTART is defined on those systems. */
2792 new_action.sa_flags = SA_RESTART;
2793 #else
2794 new_action.sa_flags = 0;
2795 #endif
2796 sigaction (signal_number, &new_action, &old_action);
2797 return (old_action.sa_handler);
2798 }
2799
2800 #ifndef __GNUC__
2801 /* If we're compiling with GCC, we don't need this function, since it
2802 can be written as a macro. */
2803 sigset_t
2804 sys_sigmask (int sig)
2805 {
2806 sigset_t mask;
2807 sigemptyset (&mask);
2808 sigaddset (&mask, sig);
2809 return mask;
2810 }
2811 #endif
2812
2813 /* I'd like to have these guys return pointers to the mask storage in here,
2814 but there'd be trouble if the code was saving multiple masks. I'll be
2815 safe and pass the structure. It normally won't be more than 2 bytes
2816 anyhow. - DJB */
2817
2818 sigset_t
2819 sys_sigblock (sigset_t new_mask)
2820 {
2821 sigset_t old_mask;
2822 sigprocmask (SIG_BLOCK, &new_mask, &old_mask);
2823 return (old_mask);
2824 }
2825
2826 sigset_t
2827 sys_sigunblock (sigset_t new_mask)
2828 {
2829 sigset_t old_mask;
2830 sigprocmask (SIG_UNBLOCK, &new_mask, &old_mask);
2831 return (old_mask);
2832 }
2833
2834 sigset_t
2835 sys_sigsetmask (sigset_t new_mask)
2836 {
2837 sigset_t old_mask;
2838 sigprocmask (SIG_SETMASK, &new_mask, &old_mask);
2839 return (old_mask);
2840 }
2841
2842 #endif /* POSIX_SIGNALS */
2843 \f
2844 #if !defined HAVE_STRSIGNAL && !HAVE_DECL_SYS_SIGLIST
2845 static char *my_sys_siglist[NSIG];
2846 # ifdef sys_siglist
2847 # undef sys_siglist
2848 # endif
2849 # define sys_siglist my_sys_siglist
2850 #endif
2851
2852 void
2853 init_signals ()
2854 {
2855 #ifdef POSIX_SIGNALS
2856 sigemptyset (&empty_mask);
2857 sigfillset (&full_mask);
2858 #endif
2859
2860 #if !defined HAVE_STRSIGNAL && !HAVE_DECL_SYS_SIGLIST
2861 if (! initialized)
2862 {
2863 # ifdef SIGABRT
2864 sys_siglist[SIGABRT] = "Aborted";
2865 # endif
2866 # ifdef SIGAIO
2867 sys_siglist[SIGAIO] = "LAN I/O interrupt";
2868 # endif
2869 # ifdef SIGALRM
2870 sys_siglist[SIGALRM] = "Alarm clock";
2871 # endif
2872 # ifdef SIGBUS
2873 sys_siglist[SIGBUS] = "Bus error";
2874 # endif
2875 # ifdef SIGCLD
2876 sys_siglist[SIGCLD] = "Child status changed";
2877 # endif
2878 # ifdef SIGCHLD
2879 sys_siglist[SIGCHLD] = "Child status changed";
2880 # endif
2881 # ifdef SIGCONT
2882 sys_siglist[SIGCONT] = "Continued";
2883 # endif
2884 # ifdef SIGDANGER
2885 sys_siglist[SIGDANGER] = "Swap space dangerously low";
2886 # endif
2887 # ifdef SIGDGNOTIFY
2888 sys_siglist[SIGDGNOTIFY] = "Notification message in queue";
2889 # endif
2890 # ifdef SIGEMT
2891 sys_siglist[SIGEMT] = "Emulation trap";
2892 # endif
2893 # ifdef SIGFPE
2894 sys_siglist[SIGFPE] = "Arithmetic exception";
2895 # endif
2896 # ifdef SIGFREEZE
2897 sys_siglist[SIGFREEZE] = "SIGFREEZE";
2898 # endif
2899 # ifdef SIGGRANT
2900 sys_siglist[SIGGRANT] = "Monitor mode granted";
2901 # endif
2902 # ifdef SIGHUP
2903 sys_siglist[SIGHUP] = "Hangup";
2904 # endif
2905 # ifdef SIGILL
2906 sys_siglist[SIGILL] = "Illegal instruction";
2907 # endif
2908 # ifdef SIGINT
2909 sys_siglist[SIGINT] = "Interrupt";
2910 # endif
2911 # ifdef SIGIO
2912 sys_siglist[SIGIO] = "I/O possible";
2913 # endif
2914 # ifdef SIGIOINT
2915 sys_siglist[SIGIOINT] = "I/O intervention required";
2916 # endif
2917 # ifdef SIGIOT
2918 sys_siglist[SIGIOT] = "IOT trap";
2919 # endif
2920 # ifdef SIGKILL
2921 sys_siglist[SIGKILL] = "Killed";
2922 # endif
2923 # ifdef SIGLOST
2924 sys_siglist[SIGLOST] = "Resource lost";
2925 # endif
2926 # ifdef SIGLWP
2927 sys_siglist[SIGLWP] = "SIGLWP";
2928 # endif
2929 # ifdef SIGMSG
2930 sys_siglist[SIGMSG] = "Monitor mode data available";
2931 # endif
2932 # ifdef SIGPHONE
2933 sys_siglist[SIGWIND] = "SIGPHONE";
2934 # endif
2935 # ifdef SIGPIPE
2936 sys_siglist[SIGPIPE] = "Broken pipe";
2937 # endif
2938 # ifdef SIGPOLL
2939 sys_siglist[SIGPOLL] = "Pollable event occurred";
2940 # endif
2941 # ifdef SIGPROF
2942 sys_siglist[SIGPROF] = "Profiling timer expired";
2943 # endif
2944 # ifdef SIGPTY
2945 sys_siglist[SIGPTY] = "PTY I/O interrupt";
2946 # endif
2947 # ifdef SIGPWR
2948 sys_siglist[SIGPWR] = "Power-fail restart";
2949 # endif
2950 # ifdef SIGQUIT
2951 sys_siglist[SIGQUIT] = "Quit";
2952 # endif
2953 # ifdef SIGRETRACT
2954 sys_siglist[SIGRETRACT] = "Need to relinguish monitor mode";
2955 # endif
2956 # ifdef SIGSAK
2957 sys_siglist[SIGSAK] = "Secure attention";
2958 # endif
2959 # ifdef SIGSEGV
2960 sys_siglist[SIGSEGV] = "Segmentation violation";
2961 # endif
2962 # ifdef SIGSOUND
2963 sys_siglist[SIGSOUND] = "Sound completed";
2964 # endif
2965 # ifdef SIGSTOP
2966 sys_siglist[SIGSTOP] = "Stopped (signal)";
2967 # endif
2968 # ifdef SIGSTP
2969 sys_siglist[SIGSTP] = "Stopped (user)";
2970 # endif
2971 # ifdef SIGSYS
2972 sys_siglist[SIGSYS] = "Bad argument to system call";
2973 # endif
2974 # ifdef SIGTERM
2975 sys_siglist[SIGTERM] = "Terminated";
2976 # endif
2977 # ifdef SIGTHAW
2978 sys_siglist[SIGTHAW] = "SIGTHAW";
2979 # endif
2980 # ifdef SIGTRAP
2981 sys_siglist[SIGTRAP] = "Trace/breakpoint trap";
2982 # endif
2983 # ifdef SIGTSTP
2984 sys_siglist[SIGTSTP] = "Stopped (user)";
2985 # endif
2986 # ifdef SIGTTIN
2987 sys_siglist[SIGTTIN] = "Stopped (tty input)";
2988 # endif
2989 # ifdef SIGTTOU
2990 sys_siglist[SIGTTOU] = "Stopped (tty output)";
2991 # endif
2992 # ifdef SIGURG
2993 sys_siglist[SIGURG] = "Urgent I/O condition";
2994 # endif
2995 # ifdef SIGUSR1
2996 sys_siglist[SIGUSR1] = "User defined signal 1";
2997 # endif
2998 # ifdef SIGUSR2
2999 sys_siglist[SIGUSR2] = "User defined signal 2";
3000 # endif
3001 # ifdef SIGVTALRM
3002 sys_siglist[SIGVTALRM] = "Virtual timer expired";
3003 # endif
3004 # ifdef SIGWAITING
3005 sys_siglist[SIGWAITING] = "Process's LWPs are blocked";
3006 # endif
3007 # ifdef SIGWINCH
3008 sys_siglist[SIGWINCH] = "Window size changed";
3009 # endif
3010 # ifdef SIGWIND
3011 sys_siglist[SIGWIND] = "SIGWIND";
3012 # endif
3013 # ifdef SIGXCPU
3014 sys_siglist[SIGXCPU] = "CPU time limit exceeded";
3015 # endif
3016 # ifdef SIGXFSZ
3017 sys_siglist[SIGXFSZ] = "File size limit exceeded";
3018 # endif
3019 }
3020 #endif /* !defined HAVE_STRSIGNAL && !defined HAVE_DECL_SYS_SIGLIST */
3021 }
3022 \f
3023 #ifndef HAVE_RANDOM
3024 #ifdef random
3025 #define HAVE_RANDOM
3026 #endif
3027 #endif
3028
3029 /* Figure out how many bits the system's random number generator uses.
3030 `random' and `lrand48' are assumed to return 31 usable bits.
3031 BSD `rand' returns a 31 bit value but the low order bits are unusable;
3032 so we'll shift it and treat it like the 15-bit USG `rand'. */
3033
3034 #ifndef RAND_BITS
3035 # ifdef HAVE_RANDOM
3036 # define RAND_BITS 31
3037 # else /* !HAVE_RANDOM */
3038 # ifdef HAVE_LRAND48
3039 # define RAND_BITS 31
3040 # define random lrand48
3041 # else /* !HAVE_LRAND48 */
3042 # define RAND_BITS 15
3043 # if RAND_MAX == 32767
3044 # define random rand
3045 # else /* RAND_MAX != 32767 */
3046 # if RAND_MAX == 2147483647
3047 # define random() (rand () >> 16)
3048 # else /* RAND_MAX != 2147483647 */
3049 # ifdef USG
3050 # define random rand
3051 # else
3052 # define random() (rand () >> 16)
3053 # endif /* !USG */
3054 # endif /* RAND_MAX != 2147483647 */
3055 # endif /* RAND_MAX != 32767 */
3056 # endif /* !HAVE_LRAND48 */
3057 # endif /* !HAVE_RANDOM */
3058 #endif /* !RAND_BITS */
3059
3060 void
3061 seed_random (arg)
3062 long arg;
3063 {
3064 #ifdef HAVE_RANDOM
3065 srandom ((unsigned int)arg);
3066 #else
3067 # ifdef HAVE_LRAND48
3068 srand48 (arg);
3069 # else
3070 srand ((unsigned int)arg);
3071 # endif
3072 #endif
3073 }
3074
3075 /*
3076 * Build a full Emacs-sized word out of whatever we've got.
3077 * This suffices even for a 64-bit architecture with a 15-bit rand.
3078 */
3079 long
3080 get_random ()
3081 {
3082 long val = random ();
3083 #if VALBITS > RAND_BITS
3084 val = (val << RAND_BITS) ^ random ();
3085 #if VALBITS > 2*RAND_BITS
3086 val = (val << RAND_BITS) ^ random ();
3087 #if VALBITS > 3*RAND_BITS
3088 val = (val << RAND_BITS) ^ random ();
3089 #if VALBITS > 4*RAND_BITS
3090 val = (val << RAND_BITS) ^ random ();
3091 #endif /* need at least 5 */
3092 #endif /* need at least 4 */
3093 #endif /* need at least 3 */
3094 #endif /* need at least 2 */
3095 return val & ((1L << VALBITS) - 1);
3096 }
3097 \f
3098 #ifdef WRONG_NAME_INSQUE
3099
3100 insque (q,p)
3101 caddr_t q,p;
3102 {
3103 _insque (q,p);
3104 }
3105
3106 #endif
3107 \f
3108 #ifdef VMS
3109
3110 #ifdef getenv
3111 /* If any place else asks for the TERM variable,
3112 allow it to be overridden with the EMACS_TERM variable
3113 before attempting to translate the logical name TERM. As a last
3114 resort, ask for VAX C's special idea of the TERM variable. */
3115 #undef getenv
3116 char *
3117 sys_getenv (name)
3118 char *name;
3119 {
3120 register char *val;
3121 static char buf[256];
3122 static struct dsc$descriptor_s equiv
3123 = {sizeof (buf), DSC$K_DTYPE_T, DSC$K_CLASS_S, buf};
3124 static struct dsc$descriptor_s d_name
3125 = {0, DSC$K_DTYPE_T, DSC$K_CLASS_S, 0};
3126 short eqlen;
3127
3128 if (!strcmp (name, "TERM"))
3129 {
3130 val = (char *) getenv ("EMACS_TERM");
3131 if (val)
3132 return val;
3133 }
3134
3135 d_name.dsc$w_length = strlen (name);
3136 d_name.dsc$a_pointer = name;
3137 if (LIB$SYS_TRNLOG (&d_name, &eqlen, &equiv) == 1)
3138 {
3139 char *str = (char *) xmalloc (eqlen + 1);
3140 bcopy (buf, str, eqlen);
3141 str[eqlen] = '\0';
3142 /* This is a storage leak, but a pain to fix. With luck,
3143 no one will ever notice. */
3144 return str;
3145 }
3146 return (char *) getenv (name);
3147 }
3148 #endif /* getenv */
3149
3150 #ifdef abort
3151 /* Since VMS doesn't believe in core dumps, the only way to debug this beast is
3152 to force a call on the debugger from within the image. */
3153 #undef abort
3154 sys_abort ()
3155 {
3156 reset_sys_modes ();
3157 LIB$SIGNAL (SS$_DEBUG);
3158 }
3159 #endif /* abort */
3160 #endif /* VMS */
3161 \f
3162 #ifdef VMS
3163 #ifdef LINK_CRTL_SHARE
3164 #ifdef SHARABLE_LIB_BUG
3165 /* Variables declared noshare and initialized in sharable libraries
3166 cannot be shared. The VMS linker incorrectly forces you to use a private
3167 version which is uninitialized... If not for this "feature", we
3168 could use the C library definition of sys_nerr and sys_errlist. */
3169 int sys_nerr = 35;
3170 char *sys_errlist[] =
3171 {
3172 "error 0",
3173 "not owner",
3174 "no such file or directory",
3175 "no such process",
3176 "interrupted system call",
3177 "i/o error",
3178 "no such device or address",
3179 "argument list too long",
3180 "exec format error",
3181 "bad file number",
3182 "no child process",
3183 "no more processes",
3184 "not enough memory",
3185 "permission denied",
3186 "bad address",
3187 "block device required",
3188 "mount devices busy",
3189 "file exists",
3190 "cross-device link",
3191 "no such device",
3192 "not a directory",
3193 "is a directory",
3194 "invalid argument",
3195 "file table overflow",
3196 "too many open files",
3197 "not a typewriter",
3198 "text file busy",
3199 "file too big",
3200 "no space left on device",
3201 "illegal seek",
3202 "read-only file system",
3203 "too many links",
3204 "broken pipe",
3205 "math argument",
3206 "result too large",
3207 "I/O stream empty",
3208 "vax/vms specific error code nontranslatable error"
3209 };
3210 #endif /* SHARABLE_LIB_BUG */
3211 #endif /* LINK_CRTL_SHARE */
3212 #endif /* VMS */
3213
3214 #ifndef HAVE_STRERROR
3215 #ifndef WINDOWSNT
3216 char *
3217 strerror (errnum)
3218 int errnum;
3219 {
3220 extern char *sys_errlist[];
3221 extern int sys_nerr;
3222
3223 if (errnum >= 0 && errnum < sys_nerr)
3224 return sys_errlist[errnum];
3225 return (char *) "Unknown error";
3226 }
3227 #endif /* not WINDOWSNT */
3228 #endif /* ! HAVE_STRERROR */
3229 \f
3230 int
3231 emacs_open (path, oflag, mode)
3232 const char *path;
3233 int oflag, mode;
3234 {
3235 register int rtnval;
3236
3237 #ifdef BSD4_1
3238 if (oflag & O_CREAT)
3239 return creat (path, mode);
3240 #endif
3241
3242 while ((rtnval = open (path, oflag, mode)) == -1
3243 && (errno == EINTR));
3244 return (rtnval);
3245 }
3246
3247 int
3248 emacs_close (fd)
3249 int fd;
3250 {
3251 int did_retry = 0;
3252 register int rtnval;
3253
3254 while ((rtnval = close (fd)) == -1
3255 && (errno == EINTR))
3256 did_retry = 1;
3257
3258 /* If close is interrupted SunOS 4.1 may or may not have closed the
3259 file descriptor. If it did the second close will fail with
3260 errno = EBADF. That means we have succeeded. */
3261 if (rtnval == -1 && did_retry && errno == EBADF)
3262 return 0;
3263
3264 return rtnval;
3265 }
3266
3267 int
3268 emacs_read (fildes, buf, nbyte)
3269 int fildes;
3270 char *buf;
3271 unsigned int nbyte;
3272 {
3273 register int rtnval;
3274
3275 while ((rtnval = read (fildes, buf, nbyte)) == -1
3276 && (errno == EINTR));
3277 return (rtnval);
3278 }
3279
3280 int
3281 emacs_write (fildes, buf, nbyte)
3282 int fildes;
3283 const char *buf;
3284 unsigned int nbyte;
3285 {
3286 register int rtnval, bytes_written;
3287
3288 bytes_written = 0;
3289
3290 while (nbyte > 0)
3291 {
3292 rtnval = write (fildes, buf, nbyte);
3293
3294 if (rtnval == -1)
3295 {
3296 if (errno == EINTR)
3297 continue;
3298 else
3299 return (bytes_written ? bytes_written : -1);
3300 }
3301
3302 buf += rtnval;
3303 nbyte -= rtnval;
3304 bytes_written += rtnval;
3305 }
3306 return (bytes_written);
3307 }
3308 \f
3309 #ifdef USG
3310 /*
3311 * All of the following are for USG.
3312 *
3313 * On USG systems the system calls are INTERRUPTIBLE by signals
3314 * that the user program has elected to catch. Thus the system call
3315 * must be retried in these cases. To handle this without massive
3316 * changes in the source code, we remap the standard system call names
3317 * to names for our own functions in sysdep.c that do the system call
3318 * with retries. Actually, for portability reasons, it is good
3319 * programming practice, as this example shows, to limit all actual
3320 * system calls to a single occurrence in the source. Sure, this
3321 * adds an extra level of function call overhead but it is almost
3322 * always negligible. Fred Fish, Unisoft Systems Inc.
3323 */
3324
3325 /*
3326 * Warning, this function may not duplicate 4.2 action properly
3327 * under error conditions.
3328 */
3329
3330 #ifndef MAXPATHLEN
3331 /* In 4.1, param.h fails to define this. */
3332 #define MAXPATHLEN 1024
3333 #endif
3334
3335 #ifndef HAVE_GETWD
3336
3337 char *
3338 getwd (pathname)
3339 char *pathname;
3340 {
3341 char *npath, *spath;
3342 extern char *getcwd ();
3343
3344 BLOCK_INPUT; /* getcwd uses malloc */
3345 spath = npath = getcwd ((char *) 0, MAXPATHLEN);
3346 if (spath == 0)
3347 {
3348 UNBLOCK_INPUT;
3349 return spath;
3350 }
3351 /* On Altos 3068, getcwd can return @hostname/dir, so discard
3352 up to first slash. Should be harmless on other systems. */
3353 while (*npath && *npath != '/')
3354 npath++;
3355 strcpy (pathname, npath);
3356 free (spath); /* getcwd uses malloc */
3357 UNBLOCK_INPUT;
3358 return pathname;
3359 }
3360
3361 #endif /* HAVE_GETWD */
3362
3363 /*
3364 * Emulate rename using unlink/link. Note that this is
3365 * only partially correct. Also, doesn't enforce restriction
3366 * that files be of same type (regular->regular, dir->dir, etc).
3367 */
3368
3369 #ifndef HAVE_RENAME
3370
3371 rename (from, to)
3372 const char *from;
3373 const char *to;
3374 {
3375 if (access (from, 0) == 0)
3376 {
3377 unlink (to);
3378 if (link (from, to) == 0)
3379 if (unlink (from) == 0)
3380 return (0);
3381 }
3382 return (-1);
3383 }
3384
3385 #endif
3386
3387
3388 #ifdef HPUX
3389 #ifndef HAVE_PERROR
3390
3391 /* HPUX curses library references perror, but as far as we know
3392 it won't be called. Anyway this definition will do for now. */
3393
3394 perror ()
3395 {
3396 }
3397
3398 #endif /* not HAVE_PERROR */
3399 #endif /* HPUX */
3400
3401 #ifndef HAVE_DUP2
3402
3403 /*
3404 * Emulate BSD dup2. First close newd if it already exists.
3405 * Then, attempt to dup oldd. If not successful, call dup2 recursively
3406 * until we are, then close the unsuccessful ones.
3407 */
3408
3409 dup2 (oldd, newd)
3410 int oldd;
3411 int newd;
3412 {
3413 register int fd, ret;
3414
3415 emacs_close (newd);
3416
3417 #ifdef F_DUPFD
3418 return fcntl (oldd, F_DUPFD, newd);
3419 #else
3420 fd = dup (old);
3421 if (fd == -1)
3422 return -1;
3423 if (fd == new)
3424 return new;
3425 ret = dup2 (old,new);
3426 emacs_close (fd);
3427 return ret;
3428 #endif
3429 }
3430
3431 #endif /* not HAVE_DUP2 */
3432
3433 /*
3434 * Gettimeofday. Simulate as much as possible. Only accurate
3435 * to nearest second. Emacs doesn't use tzp so ignore it for now.
3436 * Only needed when subprocesses are defined.
3437 */
3438
3439 #ifdef subprocesses
3440 #ifndef VMS
3441 #ifndef HAVE_GETTIMEOFDAY
3442 #ifdef HAVE_TIMEVAL
3443
3444 /* ARGSUSED */
3445 int
3446 gettimeofday (tp, tzp)
3447 struct timeval *tp;
3448 struct timezone *tzp;
3449 {
3450 extern long time ();
3451
3452 tp->tv_sec = time ((long *)0);
3453 tp->tv_usec = 0;
3454 if (tzp != 0)
3455 tzp->tz_minuteswest = -1;
3456 return 0;
3457 }
3458
3459 #endif
3460 #endif
3461 #endif
3462 #endif /* subprocess && !HAVE_GETTIMEOFDAY && HAVE_TIMEVAL && !VMS */
3463
3464 /*
3465 * This function will go away as soon as all the stubs fixed. (fnf)
3466 */
3467
3468 void
3469 croak (badfunc)
3470 char *badfunc;
3471 {
3472 printf ("%s not yet implemented\r\n", badfunc);
3473 reset_sys_modes ();
3474 exit (1);
3475 }
3476
3477 #endif /* USG */
3478 \f
3479 /* Directory routines for systems that don't have them. */
3480
3481 #ifdef SYSV_SYSTEM_DIR
3482
3483 #include <dirent.h>
3484
3485 #if defined (BROKEN_CLOSEDIR) || !defined (HAVE_CLOSEDIR)
3486
3487 int
3488 closedir (dirp)
3489 register DIR *dirp; /* stream from opendir */
3490 {
3491 int rtnval;
3492
3493 rtnval = emacs_close (dirp->dd_fd);
3494
3495 /* Some systems (like Solaris) allocate the buffer and the DIR all
3496 in one block. Why in the world are we freeing this ourselves
3497 anyway? */
3498 #if ! (defined (sun) && defined (USG5_4))
3499 xfree ((char *) dirp->dd_buf); /* directory block defined in <dirent.h> */
3500 #endif
3501 xfree ((char *) dirp);
3502
3503 return rtnval;
3504 }
3505 #endif /* BROKEN_CLOSEDIR or not HAVE_CLOSEDIR */
3506 #endif /* SYSV_SYSTEM_DIR */
3507
3508 #ifdef NONSYSTEM_DIR_LIBRARY
3509
3510 DIR *
3511 opendir (filename)
3512 char *filename; /* name of directory */
3513 {
3514 register DIR *dirp; /* -> malloc'ed storage */
3515 register int fd; /* file descriptor for read */
3516 struct stat sbuf; /* result of fstat */
3517
3518 fd = emacs_open (filename, O_RDONLY, 0);
3519 if (fd < 0)
3520 return 0;
3521
3522 BLOCK_INPUT;
3523 if (fstat (fd, &sbuf) < 0
3524 || (sbuf.st_mode & S_IFMT) != S_IFDIR
3525 || (dirp = (DIR *) xmalloc (sizeof (DIR))) == 0)
3526 {
3527 emacs_close (fd);
3528 UNBLOCK_INPUT;
3529 return 0; /* bad luck today */
3530 }
3531 UNBLOCK_INPUT;
3532
3533 dirp->dd_fd = fd;
3534 dirp->dd_loc = dirp->dd_size = 0; /* refill needed */
3535
3536 return dirp;
3537 }
3538
3539 void
3540 closedir (dirp)
3541 register DIR *dirp; /* stream from opendir */
3542 {
3543 emacs_close (dirp->dd_fd);
3544 xfree ((char *) dirp);
3545 }
3546
3547
3548 #ifndef VMS
3549 #define DIRSIZ 14
3550 struct olddir
3551 {
3552 ino_t od_ino; /* inode */
3553 char od_name[DIRSIZ]; /* filename */
3554 };
3555 #endif /* not VMS */
3556
3557 struct direct dir_static; /* simulated directory contents */
3558
3559 /* ARGUSED */
3560 struct direct *
3561 readdir (dirp)
3562 register DIR *dirp; /* stream from opendir */
3563 {
3564 #ifndef VMS
3565 register struct olddir *dp; /* -> directory data */
3566 #else /* VMS */
3567 register struct dir$_name *dp; /* -> directory data */
3568 register struct dir$_version *dv; /* -> version data */
3569 #endif /* VMS */
3570
3571 for (; ;)
3572 {
3573 if (dirp->dd_loc >= dirp->dd_size)
3574 dirp->dd_loc = dirp->dd_size = 0;
3575
3576 if (dirp->dd_size == 0 /* refill buffer */
3577 && (dirp->dd_size = emacs_read (dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ)) <= 0)
3578 return 0;
3579
3580 #ifndef VMS
3581 dp = (struct olddir *) &dirp->dd_buf[dirp->dd_loc];
3582 dirp->dd_loc += sizeof (struct olddir);
3583
3584 if (dp->od_ino != 0) /* not deleted entry */
3585 {
3586 dir_static.d_ino = dp->od_ino;
3587 strncpy (dir_static.d_name, dp->od_name, DIRSIZ);
3588 dir_static.d_name[DIRSIZ] = '\0';
3589 dir_static.d_namlen = strlen (dir_static.d_name);
3590 dir_static.d_reclen = sizeof (struct direct)
3591 - MAXNAMLEN + 3
3592 + dir_static.d_namlen - dir_static.d_namlen % 4;
3593 return &dir_static; /* -> simulated structure */
3594 }
3595 #else /* VMS */
3596 dp = (struct dir$_name *) dirp->dd_buf;
3597 if (dirp->dd_loc == 0)
3598 dirp->dd_loc = (dp->dir$b_namecount&1) ? dp->dir$b_namecount + 1
3599 : dp->dir$b_namecount;
3600 dv = (struct dir$_version *)&dp->dir$t_name[dirp->dd_loc];
3601 dir_static.d_ino = dv->dir$w_fid_num;
3602 dir_static.d_namlen = dp->dir$b_namecount;
3603 dir_static.d_reclen = sizeof (struct direct)
3604 - MAXNAMLEN + 3
3605 + dir_static.d_namlen - dir_static.d_namlen % 4;
3606 strncpy (dir_static.d_name, dp->dir$t_name, dp->dir$b_namecount);
3607 dir_static.d_name[dir_static.d_namlen] = '\0';
3608 dirp->dd_loc = dirp->dd_size; /* only one record at a time */
3609 return &dir_static;
3610 #endif /* VMS */
3611 }
3612 }
3613
3614 #ifdef VMS
3615 /* readdirver is just like readdir except it returns all versions of a file
3616 as separate entries. */
3617
3618 /* ARGUSED */
3619 struct direct *
3620 readdirver (dirp)
3621 register DIR *dirp; /* stream from opendir */
3622 {
3623 register struct dir$_name *dp; /* -> directory data */
3624 register struct dir$_version *dv; /* -> version data */
3625
3626 if (dirp->dd_loc >= dirp->dd_size - sizeof (struct dir$_name))
3627 dirp->dd_loc = dirp->dd_size = 0;
3628
3629 if (dirp->dd_size == 0 /* refill buffer */
3630 && (dirp->dd_size = sys_read (dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ)) <= 0)
3631 return 0;
3632
3633 dp = (struct dir$_name *) dirp->dd_buf;
3634 if (dirp->dd_loc == 0)
3635 dirp->dd_loc = (dp->dir$b_namecount & 1) ? dp->dir$b_namecount + 1
3636 : dp->dir$b_namecount;
3637 dv = (struct dir$_version *) &dp->dir$t_name[dirp->dd_loc];
3638 strncpy (dir_static.d_name, dp->dir$t_name, dp->dir$b_namecount);
3639 sprintf (&dir_static.d_name[dp->dir$b_namecount], ";%d", dv->dir$w_version);
3640 dir_static.d_namlen = strlen (dir_static.d_name);
3641 dir_static.d_ino = dv->dir$w_fid_num;
3642 dir_static.d_reclen = sizeof (struct direct) - MAXNAMLEN + 3
3643 + dir_static.d_namlen - dir_static.d_namlen % 4;
3644 dirp->dd_loc = ((char *) (++dv) - dp->dir$t_name);
3645 return &dir_static;
3646 }
3647
3648 #endif /* VMS */
3649
3650 #endif /* NONSYSTEM_DIR_LIBRARY */
3651
3652 \f
3653 int
3654 set_file_times (filename, atime, mtime)
3655 const char *filename;
3656 EMACS_TIME atime, mtime;
3657 {
3658 #ifdef HAVE_UTIMES
3659 struct timeval tv[2];
3660 tv[0] = atime;
3661 tv[1] = mtime;
3662 return utimes (filename, tv);
3663 #else /* not HAVE_UTIMES */
3664 struct utimbuf utb;
3665 utb.actime = EMACS_SECS (atime);
3666 utb.modtime = EMACS_SECS (mtime);
3667 return utime (filename, &utb);
3668 #endif /* not HAVE_UTIMES */
3669 }
3670 \f
3671 /* mkdir and rmdir functions, for systems which don't have them. */
3672
3673 #ifndef HAVE_MKDIR
3674 /*
3675 * Written by Robert Rother, Mariah Corporation, August 1985.
3676 *
3677 * If you want it, it's yours. All I ask in return is that if you
3678 * figure out how to do this in a Bourne Shell script you send me
3679 * a copy.
3680 * sdcsvax!rmr or rmr@uscd
3681 *
3682 * Severely hacked over by John Gilmore to make a 4.2BSD compatible
3683 * subroutine. 11Mar86; hoptoad!gnu
3684 *
3685 * Modified by rmtodd@uokmax 6-28-87 -- when making an already existing dir,
3686 * subroutine didn't return EEXIST. It does now.
3687 */
3688
3689 /*
3690 * Make a directory.
3691 */
3692 #ifdef MKDIR_PROTOTYPE
3693 MKDIR_PROTOTYPE
3694 #else
3695 int
3696 mkdir (dpath, dmode)
3697 char *dpath;
3698 int dmode;
3699 #endif
3700 {
3701 int cpid, status, fd;
3702 struct stat statbuf;
3703
3704 if (stat (dpath, &statbuf) == 0)
3705 {
3706 errno = EEXIST; /* Stat worked, so it already exists */
3707 return -1;
3708 }
3709
3710 /* If stat fails for a reason other than non-existence, return error */
3711 if (errno != ENOENT)
3712 return -1;
3713
3714 synch_process_alive = 1;
3715 switch (cpid = fork ())
3716 {
3717
3718 case -1: /* Error in fork */
3719 return (-1); /* Errno is set already */
3720
3721 case 0: /* Child process */
3722 /*
3723 * Cheap hack to set mode of new directory. Since this
3724 * child process is going away anyway, we zap its umask.
3725 * FIXME, this won't suffice to set SUID, SGID, etc. on this
3726 * directory. Does anybody care?
3727 */
3728 status = umask (0); /* Get current umask */
3729 status = umask (status | (0777 & ~dmode)); /* Set for mkdir */
3730 fd = emacs_open ("/dev/null", O_RDWR, 0);
3731 if (fd >= 0)
3732 {
3733 dup2 (fd, 0);
3734 dup2 (fd, 1);
3735 dup2 (fd, 2);
3736 }
3737 execl ("/bin/mkdir", "mkdir", dpath, (char *) 0);
3738 _exit (-1); /* Can't exec /bin/mkdir */
3739
3740 default: /* Parent process */
3741 wait_for_termination (cpid);
3742 }
3743
3744 if (synch_process_death != 0 || synch_process_retcode != 0
3745 || synch_process_termsig != 0)
3746 {
3747 errno = EIO; /* We don't know why, but */
3748 return -1; /* /bin/mkdir failed */
3749 }
3750
3751 return 0;
3752 }
3753 #endif /* not HAVE_MKDIR */
3754
3755 #ifndef HAVE_RMDIR
3756 int
3757 rmdir (dpath)
3758 char *dpath;
3759 {
3760 int cpid, status, fd;
3761 struct stat statbuf;
3762
3763 if (stat (dpath, &statbuf) != 0)
3764 {
3765 /* Stat just set errno. We don't have to */
3766 return -1;
3767 }
3768
3769 synch_process_alive = 1;
3770 switch (cpid = fork ())
3771 {
3772
3773 case -1: /* Error in fork */
3774 return (-1); /* Errno is set already */
3775
3776 case 0: /* Child process */
3777 fd = emacs_open ("/dev/null", O_RDWR, 0);
3778 if (fd >= 0)
3779 {
3780 dup2 (fd, 0);
3781 dup2 (fd, 1);
3782 dup2 (fd, 2);
3783 }
3784 execl ("/bin/rmdir", "rmdir", dpath, (char *) 0);
3785 _exit (-1); /* Can't exec /bin/rmdir */
3786
3787 default: /* Parent process */
3788 wait_for_termination (cpid);
3789 }
3790
3791 if (synch_process_death != 0 || synch_process_retcode != 0
3792 || synch_process_termsig != 0)
3793 {
3794 errno = EIO; /* We don't know why, but */
3795 return -1; /* /bin/rmdir failed */
3796 }
3797
3798 return 0;
3799 }
3800 #endif /* !HAVE_RMDIR */
3801
3802
3803 \f
3804 /* Functions for VMS */
3805 #ifdef VMS
3806 #include "vms-pwd.h"
3807 #include <acldef.h>
3808 #include <chpdef.h>
3809 #include <jpidef.h>
3810
3811 /* Return as a string the VMS error string pertaining to STATUS.
3812 Reuses the same static buffer each time it is called. */
3813
3814 char *
3815 vmserrstr (status)
3816 int status; /* VMS status code */
3817 {
3818 int bufadr[2];
3819 short len;
3820 static char buf[257];
3821
3822 bufadr[0] = sizeof buf - 1;
3823 bufadr[1] = (int) buf;
3824 if (! (SYS$GETMSG (status, &len, bufadr, 0x1, 0) & 1))
3825 return "untranslatable VMS error status";
3826 buf[len] = '\0';
3827 return buf;
3828 }
3829
3830 #ifdef access
3831 #undef access
3832
3833 /* The following is necessary because 'access' emulation by VMS C (2.0) does
3834 * not work correctly. (It also doesn't work well in version 2.3.)
3835 */
3836
3837 #ifdef VMS4_4
3838
3839 #define DESCRIPTOR(name,string) struct dsc$descriptor_s name = \
3840 { strlen (string), DSC$K_DTYPE_T, DSC$K_CLASS_S, string }
3841
3842 typedef union {
3843 struct {
3844 unsigned short s_buflen;
3845 unsigned short s_code;
3846 char *s_bufadr;
3847 unsigned short *s_retlenadr;
3848 } s;
3849 int end;
3850 } item;
3851 #define buflen s.s_buflen
3852 #define code s.s_code
3853 #define bufadr s.s_bufadr
3854 #define retlenadr s.s_retlenadr
3855
3856 #define R_OK 4 /* test for read permission */
3857 #define W_OK 2 /* test for write permission */
3858 #define X_OK 1 /* test for execute (search) permission */
3859 #define F_OK 0 /* test for presence of file */
3860
3861 int
3862 sys_access (path, mode)
3863 char *path;
3864 int mode;
3865 {
3866 static char *user = NULL;
3867 char dir_fn[512];
3868
3869 /* translate possible directory spec into .DIR file name, so brain-dead
3870 * access can treat the directory like a file. */
3871 if (directory_file_name (path, dir_fn))
3872 path = dir_fn;
3873
3874 if (mode == F_OK)
3875 return access (path, mode);
3876 if (user == NULL && (user = (char *) getenv ("USER")) == NULL)
3877 return -1;
3878 {
3879 int stat;
3880 int flags;
3881 int acces;
3882 unsigned short int dummy;
3883 item itemlst[3];
3884 static int constant = ACL$C_FILE;
3885 DESCRIPTOR (path_desc, path);
3886 DESCRIPTOR (user_desc, user);
3887
3888 flags = 0;
3889 acces = 0;
3890 if ((mode & X_OK) && ((stat = access (path, mode)) < 0 || mode == X_OK))
3891 return stat;
3892 if (mode & R_OK)
3893 acces |= CHP$M_READ;
3894 if (mode & W_OK)
3895 acces |= CHP$M_WRITE;
3896 itemlst[0].buflen = sizeof (int);
3897 itemlst[0].code = CHP$_FLAGS;
3898 itemlst[0].bufadr = (char *) &flags;
3899 itemlst[0].retlenadr = &dummy;
3900 itemlst[1].buflen = sizeof (int);
3901 itemlst[1].code = CHP$_ACCESS;
3902 itemlst[1].bufadr = (char *) &acces;
3903 itemlst[1].retlenadr = &dummy;
3904 itemlst[2].end = CHP$_END;
3905 stat = SYS$CHECK_ACCESS (&constant, &path_desc, &user_desc, itemlst);
3906 return stat == SS$_NORMAL ? 0 : -1;
3907 }
3908 }
3909
3910 #else /* not VMS4_4 */
3911
3912 #include <prvdef.h>
3913 #define ACE$M_WRITE 2
3914 #define ACE$C_KEYID 1
3915
3916 static unsigned short memid, grpid;
3917 static unsigned int uic;
3918
3919 /* Called from init_sys_modes, so it happens not very often
3920 but at least each time Emacs is loaded. */
3921 void
3922 sys_access_reinit ()
3923 {
3924 uic = 0;
3925 }
3926
3927 int
3928 sys_access (filename, type)
3929 char * filename;
3930 int type;
3931 {
3932 struct FAB fab;
3933 struct XABPRO xab;
3934 int status, size, i, typecode, acl_controlled;
3935 unsigned int *aclptr, *aclend, aclbuf[60];
3936 union prvdef prvmask;
3937
3938 /* Get UIC and GRP values for protection checking. */
3939 if (uic == 0)
3940 {
3941 status = LIB$GETJPI (&JPI$_UIC, 0, 0, &uic, 0, 0);
3942 if (! (status & 1))
3943 return -1;
3944 memid = uic & 0xFFFF;
3945 grpid = uic >> 16;
3946 }
3947
3948 if (type != 2) /* not checking write access */
3949 return access (filename, type);
3950
3951 /* Check write protection. */
3952
3953 #define CHECKPRIV(bit) (prvmask.bit)
3954 #define WRITABLE(field) (! ((xab.xab$w_pro >> field) & XAB$M_NOWRITE))
3955
3956 /* Find privilege bits */
3957 status = SYS$SETPRV (0, 0, 0, prvmask);
3958 if (! (status & 1))
3959 error ("Unable to find privileges: %s", vmserrstr (status));
3960 if (CHECKPRIV (PRV$V_BYPASS))
3961 return 0; /* BYPASS enabled */
3962 fab = cc$rms_fab;
3963 fab.fab$b_fac = FAB$M_GET;
3964 fab.fab$l_fna = filename;
3965 fab.fab$b_fns = strlen (filename);
3966 fab.fab$l_xab = &xab;
3967 xab = cc$rms_xabpro;
3968 xab.xab$l_aclbuf = aclbuf;
3969 xab.xab$w_aclsiz = sizeof (aclbuf);
3970 status = SYS$OPEN (&fab, 0, 0);
3971 if (! (status & 1))
3972 return -1;
3973 SYS$CLOSE (&fab, 0, 0);
3974 /* Check system access */
3975 if (CHECKPRIV (PRV$V_SYSPRV) && WRITABLE (XAB$V_SYS))
3976 return 0;
3977 /* Check ACL entries, if any */
3978 acl_controlled = 0;
3979 if (xab.xab$w_acllen > 0)
3980 {
3981 aclptr = aclbuf;
3982 aclend = &aclbuf[xab.xab$w_acllen / 4];
3983 while (*aclptr && aclptr < aclend)
3984 {
3985 size = (*aclptr & 0xff) / 4;
3986 typecode = (*aclptr >> 8) & 0xff;
3987 if (typecode == ACE$C_KEYID)
3988 for (i = size - 1; i > 1; i--)
3989 if (aclptr[i] == uic)
3990 {
3991 acl_controlled = 1;
3992 if (aclptr[1] & ACE$M_WRITE)
3993 return 0; /* Write access through ACL */
3994 }
3995 aclptr = &aclptr[size];
3996 }
3997 if (acl_controlled) /* ACL specified, prohibits write access */
3998 return -1;
3999 }
4000 /* No ACL entries specified, check normal protection */
4001 if (WRITABLE (XAB$V_WLD)) /* World writable */
4002 return 0;
4003 if (WRITABLE (XAB$V_GRP) &&
4004 (unsigned short) (xab.xab$l_uic >> 16) == grpid)
4005 return 0; /* Group writable */
4006 if (WRITABLE (XAB$V_OWN) &&
4007 (xab.xab$l_uic & 0xFFFF) == memid)
4008 return 0; /* Owner writable */
4009
4010 return -1; /* Not writable */
4011 }
4012 #endif /* not VMS4_4 */
4013 #endif /* access */
4014
4015 static char vtbuf[NAM$C_MAXRSS+1];
4016
4017 /* translate a vms file spec to a unix path */
4018 char *
4019 sys_translate_vms (vfile)
4020 char * vfile;
4021 {
4022 char * p;
4023 char * targ;
4024
4025 if (!vfile)
4026 return 0;
4027
4028 targ = vtbuf;
4029
4030 /* leading device or logical name is a root directory */
4031 if (p = strchr (vfile, ':'))
4032 {
4033 *targ++ = '/';
4034 while (vfile < p)
4035 *targ++ = *vfile++;
4036 vfile++;
4037 *targ++ = '/';
4038 }
4039 p = vfile;
4040 if (*p == '[' || *p == '<')
4041 {
4042 while (*++vfile != *p + 2)
4043 switch (*vfile)
4044 {
4045 case '.':
4046 if (vfile[-1] == *p)
4047 *targ++ = '.';
4048 *targ++ = '/';
4049 break;
4050
4051 case '-':
4052 *targ++ = '.';
4053 *targ++ = '.';
4054 break;
4055
4056 default:
4057 *targ++ = *vfile;
4058 break;
4059 }
4060 vfile++;
4061 *targ++ = '/';
4062 }
4063 while (*vfile)
4064 *targ++ = *vfile++;
4065
4066 return vtbuf;
4067 }
4068
4069 static char utbuf[NAM$C_MAXRSS+1];
4070
4071 /* translate a unix path to a VMS file spec */
4072 char *
4073 sys_translate_unix (ufile)
4074 char * ufile;
4075 {
4076 int slash_seen = 0;
4077 char *p;
4078 char * targ;
4079
4080 if (!ufile)
4081 return 0;
4082
4083 targ = utbuf;
4084
4085 if (*ufile == '/')
4086 {
4087 ufile++;
4088 }
4089
4090 while (*ufile)
4091 {
4092 switch (*ufile)
4093 {
4094 case '/':
4095 if (slash_seen)
4096 if (index (&ufile[1], '/'))
4097 *targ++ = '.';
4098 else
4099 *targ++ = ']';
4100 else
4101 {
4102 *targ++ = ':';
4103 if (index (&ufile[1], '/'))
4104 *targ++ = '[';
4105 slash_seen = 1;
4106 }
4107 break;
4108
4109 case '.':
4110 if (strncmp (ufile, "./", 2) == 0)
4111 {
4112 if (!slash_seen)
4113 {
4114 *targ++ = '[';
4115 slash_seen = 1;
4116 }
4117 ufile++; /* skip the dot */
4118 if (index (&ufile[1], '/'))
4119 *targ++ = '.';
4120 else
4121 *targ++ = ']';
4122 }
4123 else if (strncmp (ufile, "../", 3) == 0)
4124 {
4125 if (!slash_seen)
4126 {
4127 *targ++ = '[';
4128 slash_seen = 1;
4129 }
4130 *targ++ = '-';
4131 ufile += 2; /* skip the dots */
4132 if (index (&ufile[1], '/'))
4133 *targ++ = '.';
4134 else
4135 *targ++ = ']';
4136 }
4137 else
4138 *targ++ = *ufile;
4139 break;
4140
4141 default:
4142 *targ++ = *ufile;
4143 break;
4144 }
4145 ufile++;
4146 }
4147 *targ = '\0';
4148
4149 return utbuf;
4150 }
4151
4152 char *
4153 getwd (pathname)
4154 char *pathname;
4155 {
4156 char *ptr, *val;
4157 extern char *getcwd ();
4158
4159 #define MAXPATHLEN 1024
4160
4161 ptr = xmalloc (MAXPATHLEN);
4162 val = getcwd (ptr, MAXPATHLEN);
4163 if (val == 0)
4164 {
4165 xfree (ptr);
4166 return val;
4167 }
4168 strcpy (pathname, ptr);
4169 xfree (ptr);
4170
4171 return pathname;
4172 }
4173
4174 int
4175 getppid ()
4176 {
4177 long item_code = JPI$_OWNER;
4178 unsigned long parent_id;
4179 int status;
4180
4181 if (((status = LIB$GETJPI (&item_code, 0, 0, &parent_id)) & 1) == 0)
4182 {
4183 errno = EVMSERR;
4184 vaxc$errno = status;
4185 return -1;
4186 }
4187 return parent_id;
4188 }
4189
4190 #undef getuid
4191 unsigned
4192 sys_getuid ()
4193 {
4194 return (getgid () << 16) | getuid ();
4195 }
4196
4197 #undef read
4198 int
4199 sys_read (fildes, buf, nbyte)
4200 int fildes;
4201 char *buf;
4202 unsigned int nbyte;
4203 {
4204 return read (fildes, buf, (nbyte < MAXIOSIZE ? nbyte : MAXIOSIZE));
4205 }
4206
4207 #if 0
4208 int
4209 sys_write (fildes, buf, nbyte)
4210 int fildes;
4211 char *buf;
4212 unsigned int nbyte;
4213 {
4214 register int nwrote, rtnval = 0;
4215
4216 while (nbyte > MAXIOSIZE && (nwrote = write (fildes, buf, MAXIOSIZE)) > 0) {
4217 nbyte -= nwrote;
4218 buf += nwrote;
4219 rtnval += nwrote;
4220 }
4221 if (nwrote < 0)
4222 return rtnval ? rtnval : -1;
4223 if ((nwrote = write (fildes, buf, nbyte)) < 0)
4224 return rtnval ? rtnval : -1;
4225 return (rtnval + nwrote);
4226 }
4227 #endif /* 0 */
4228
4229 /*
4230 * VAX/VMS VAX C RTL really loses. It insists that records
4231 * end with a newline (carriage return) character, and if they
4232 * don't it adds one (nice of it isn't it!)
4233 *
4234 * Thus we do this stupidity below.
4235 */
4236
4237 #undef write
4238 int
4239 sys_write (fildes, buf, nbytes)
4240 int fildes;
4241 char *buf;
4242 unsigned int nbytes;
4243 {
4244 register char *p;
4245 register char *e;
4246 int sum = 0;
4247 struct stat st;
4248
4249 fstat (fildes, &st);
4250 p = buf;
4251 while (nbytes > 0)
4252 {
4253 int len, retval;
4254
4255 /* Handle fixed-length files with carriage control. */
4256 if (st.st_fab_rfm == FAB$C_FIX
4257 && ((st.st_fab_rat & (FAB$M_FTN | FAB$M_CR)) != 0))
4258 {
4259 len = st.st_fab_mrs;
4260 retval = write (fildes, p, min (len, nbytes));
4261 if (retval != len)
4262 return -1;
4263 retval++; /* This skips the implied carriage control */
4264 }
4265 else
4266 {
4267 e = p + min (MAXIOSIZE, nbytes) - 1;
4268 while (*e != '\n' && e > p) e--;
4269 if (p == e) /* Ok.. so here we add a newline... sigh. */
4270 e = p + min (MAXIOSIZE, nbytes) - 1;
4271 len = e + 1 - p;
4272 retval = write (fildes, p, len);
4273 if (retval != len)
4274 return -1;
4275 }
4276 p += retval;
4277 sum += retval;
4278 nbytes -= retval;
4279 }
4280 return sum;
4281 }
4282
4283 /* Create file NEW copying its attributes from file OLD. If
4284 OLD is 0 or does not exist, create based on the value of
4285 vms_stmlf_recfm. */
4286
4287 /* Protection value the file should ultimately have.
4288 Set by create_copy_attrs, and use by rename_sansversions. */
4289 static unsigned short int fab_final_pro;
4290
4291 int
4292 creat_copy_attrs (old, new)
4293 char *old, *new;
4294 {
4295 struct FAB fab = cc$rms_fab;
4296 struct XABPRO xabpro;
4297 char aclbuf[256]; /* Choice of size is arbitrary. See below. */
4298 extern int vms_stmlf_recfm;
4299
4300 if (old)
4301 {
4302 fab.fab$b_fac = FAB$M_GET;
4303 fab.fab$l_fna = old;
4304 fab.fab$b_fns = strlen (old);
4305 fab.fab$l_xab = (char *) &xabpro;
4306 xabpro = cc$rms_xabpro;
4307 xabpro.xab$l_aclbuf = aclbuf;
4308 xabpro.xab$w_aclsiz = sizeof aclbuf;
4309 /* Call $OPEN to fill in the fab & xabpro fields. */
4310 if (SYS$OPEN (&fab, 0, 0) & 1)
4311 {
4312 SYS$CLOSE (&fab, 0, 0);
4313 fab.fab$l_alq = 0; /* zero the allocation quantity */
4314 if (xabpro.xab$w_acllen > 0)
4315 {
4316 if (xabpro.xab$w_acllen > sizeof aclbuf)
4317 /* If the acl buffer was too short, redo open with longer one.
4318 Wouldn't need to do this if there were some system imposed
4319 limit on the size of an ACL, but I can't find any such. */
4320 {
4321 xabpro.xab$l_aclbuf = (char *) alloca (xabpro.xab$w_acllen);
4322 xabpro.xab$w_aclsiz = xabpro.xab$w_acllen;
4323 if (SYS$OPEN (&fab, 0, 0) & 1)
4324 SYS$CLOSE (&fab, 0, 0);
4325 else
4326 old = 0;
4327 }
4328 }
4329 else
4330 xabpro.xab$l_aclbuf = 0;
4331 }
4332 else
4333 old = 0;
4334 }
4335 fab.fab$l_fna = new;
4336 fab.fab$b_fns = strlen (new);
4337 if (!old)
4338 {
4339 fab.fab$l_xab = 0;
4340 fab.fab$b_rfm = vms_stmlf_recfm ? FAB$C_STMLF : FAB$C_VAR;
4341 fab.fab$b_rat = FAB$M_CR;
4342 }
4343
4344 /* Set the file protections such that we will be able to manipulate
4345 this file. Once we are done writing and renaming it, we will set
4346 the protections back. */
4347 if (old)
4348 fab_final_pro = xabpro.xab$w_pro;
4349 else
4350 SYS$SETDFPROT (0, &fab_final_pro);
4351 xabpro.xab$w_pro &= 0xff0f; /* set O:rewd for now. This is set back later. */
4352
4353 /* Create the new file with either default attrs or attrs copied
4354 from old file. */
4355 if (!(SYS$CREATE (&fab, 0, 0) & 1))
4356 return -1;
4357 SYS$CLOSE (&fab, 0, 0);
4358 /* As this is a "replacement" for creat, return a file descriptor
4359 opened for writing. */
4360 return open (new, O_WRONLY);
4361 }
4362
4363 #ifdef creat
4364 #undef creat
4365 #include <varargs.h>
4366 #ifdef __GNUC__
4367 #ifndef va_count
4368 #define va_count(X) ((X) = *(((int *) &(va_alist)) - 1))
4369 #endif
4370 #endif
4371
4372 int
4373 sys_creat (va_alist)
4374 va_dcl
4375 {
4376 va_list list_incrementer;
4377 char *name;
4378 int mode;
4379 int rfd; /* related file descriptor */
4380 int fd; /* Our new file descriptor */
4381 int count;
4382 struct stat st_buf;
4383 char rfm[12];
4384 char rat[15];
4385 char mrs[13];
4386 char fsz[13];
4387 extern int vms_stmlf_recfm;
4388
4389 va_count (count);
4390 va_start (list_incrementer);
4391 name = va_arg (list_incrementer, char *);
4392 mode = va_arg (list_incrementer, int);
4393 if (count > 2)
4394 rfd = va_arg (list_incrementer, int);
4395 va_end (list_incrementer);
4396 if (count > 2)
4397 {
4398 /* Use information from the related file descriptor to set record
4399 format of the newly created file. */
4400 fstat (rfd, &st_buf);
4401 switch (st_buf.st_fab_rfm)
4402 {
4403 case FAB$C_FIX:
4404 strcpy (rfm, "rfm = fix");
4405 sprintf (mrs, "mrs = %d", st_buf.st_fab_mrs);
4406 strcpy (rat, "rat = ");
4407 if (st_buf.st_fab_rat & FAB$M_CR)
4408 strcat (rat, "cr");
4409 else if (st_buf.st_fab_rat & FAB$M_FTN)
4410 strcat (rat, "ftn");
4411 else if (st_buf.st_fab_rat & FAB$M_PRN)
4412 strcat (rat, "prn");
4413 if (st_buf.st_fab_rat & FAB$M_BLK)
4414 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4415 strcat (rat, ", blk");
4416 else
4417 strcat (rat, "blk");
4418 return creat (name, 0, rfm, rat, mrs);
4419
4420 case FAB$C_VFC:
4421 strcpy (rfm, "rfm = vfc");
4422 sprintf (fsz, "fsz = %d", st_buf.st_fab_fsz);
4423 strcpy (rat, "rat = ");
4424 if (st_buf.st_fab_rat & FAB$M_CR)
4425 strcat (rat, "cr");
4426 else if (st_buf.st_fab_rat & FAB$M_FTN)
4427 strcat (rat, "ftn");
4428 else if (st_buf.st_fab_rat & FAB$M_PRN)
4429 strcat (rat, "prn");
4430 if (st_buf.st_fab_rat & FAB$M_BLK)
4431 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4432 strcat (rat, ", blk");
4433 else
4434 strcat (rat, "blk");
4435 return creat (name, 0, rfm, rat, fsz);
4436
4437 case FAB$C_STM:
4438 strcpy (rfm, "rfm = stm");
4439 break;
4440
4441 case FAB$C_STMCR:
4442 strcpy (rfm, "rfm = stmcr");
4443 break;
4444
4445 case FAB$C_STMLF:
4446 strcpy (rfm, "rfm = stmlf");
4447 break;
4448
4449 case FAB$C_UDF:
4450 strcpy (rfm, "rfm = udf");
4451 break;
4452
4453 case FAB$C_VAR:
4454 strcpy (rfm, "rfm = var");
4455 break;
4456 }
4457 strcpy (rat, "rat = ");
4458 if (st_buf.st_fab_rat & FAB$M_CR)
4459 strcat (rat, "cr");
4460 else if (st_buf.st_fab_rat & FAB$M_FTN)
4461 strcat (rat, "ftn");
4462 else if (st_buf.st_fab_rat & FAB$M_PRN)
4463 strcat (rat, "prn");
4464 if (st_buf.st_fab_rat & FAB$M_BLK)
4465 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4466 strcat (rat, ", blk");
4467 else
4468 strcat (rat, "blk");
4469 }
4470 else
4471 {
4472 strcpy (rfm, vms_stmlf_recfm ? "rfm = stmlf" : "rfm=var");
4473 strcpy (rat, "rat=cr");
4474 }
4475 /* Until the VAX C RTL fixes the many bugs with modes, always use
4476 mode 0 to get the user's default protection. */
4477 fd = creat (name, 0, rfm, rat);
4478 if (fd < 0 && errno == EEXIST)
4479 {
4480 if (unlink (name) < 0)
4481 report_file_error ("delete", build_string (name));
4482 fd = creat (name, 0, rfm, rat);
4483 }
4484 return fd;
4485 }
4486 #endif /* creat */
4487
4488 /* fwrite to stdout is S L O W. Speed it up by using fputc...*/
4489 int
4490 sys_fwrite (ptr, size, num, fp)
4491 register char * ptr;
4492 FILE * fp;
4493 {
4494 register int tot = num * size;
4495
4496 while (tot--)
4497 fputc (*ptr++, fp);
4498 return num;
4499 }
4500
4501 /*
4502 * The VMS C library routine creat actually creates a new version of an
4503 * existing file rather than truncating the old version. There are times
4504 * when this is not the desired behavior, for instance, when writing an
4505 * auto save file (you only want one version), or when you don't have
4506 * write permission in the directory containing the file (but the file
4507 * itself is writable). Hence this routine, which is equivalent to
4508 * "close (creat (fn, 0));" on Unix if fn already exists.
4509 */
4510 int
4511 vms_truncate (fn)
4512 char *fn;
4513 {
4514 struct FAB xfab = cc$rms_fab;
4515 struct RAB xrab = cc$rms_rab;
4516 int status;
4517
4518 xfab.fab$l_fop = FAB$M_TEF; /* free allocated but unused blocks on close */
4519 xfab.fab$b_fac = FAB$M_TRN | FAB$M_GET; /* allow truncate and get access */
4520 xfab.fab$b_shr = FAB$M_NIL; /* allow no sharing - file must be locked */
4521 xfab.fab$l_fna = fn;
4522 xfab.fab$b_fns = strlen (fn);
4523 xfab.fab$l_dna = ";0"; /* default to latest version of the file */
4524 xfab.fab$b_dns = 2;
4525 xrab.rab$l_fab = &xfab;
4526
4527 /* This gibberish opens the file, positions to the first record, and
4528 deletes all records from there until the end of file. */
4529 if ((SYS$OPEN (&xfab) & 01) == 01)
4530 {
4531 if ((SYS$CONNECT (&xrab) & 01) == 01 &&
4532 (SYS$FIND (&xrab) & 01) == 01 &&
4533 (SYS$TRUNCATE (&xrab) & 01) == 01)
4534 status = 0;
4535 else
4536 status = -1;
4537 }
4538 else
4539 status = -1;
4540 SYS$CLOSE (&xfab);
4541 return status;
4542 }
4543
4544 /* Define this symbol to actually read SYSUAF.DAT. This requires either
4545 SYSPRV or a readable SYSUAF.DAT. */
4546
4547 #ifdef READ_SYSUAF
4548 /*
4549 * getuaf.c
4550 *
4551 * Routine to read the VMS User Authorization File and return
4552 * a specific user's record.
4553 */
4554
4555 static struct UAF retuaf;
4556
4557 struct UAF *
4558 get_uaf_name (uname)
4559 char * uname;
4560 {
4561 register status;
4562 struct FAB uaf_fab;
4563 struct RAB uaf_rab;
4564
4565 uaf_fab = cc$rms_fab;
4566 uaf_rab = cc$rms_rab;
4567 /* initialize fab fields */
4568 uaf_fab.fab$l_fna = "SYS$SYSTEM:SYSUAF.DAT";
4569 uaf_fab.fab$b_fns = 21;
4570 uaf_fab.fab$b_fac = FAB$M_GET;
4571 uaf_fab.fab$b_org = FAB$C_IDX;
4572 uaf_fab.fab$b_shr = FAB$M_GET|FAB$M_PUT|FAB$M_UPD|FAB$M_DEL;
4573 /* initialize rab fields */
4574 uaf_rab.rab$l_fab = &uaf_fab;
4575 /* open the User Authorization File */
4576 status = SYS$OPEN (&uaf_fab);
4577 if (!(status&1))
4578 {
4579 errno = EVMSERR;
4580 vaxc$errno = status;
4581 return 0;
4582 }
4583 status = SYS$CONNECT (&uaf_rab);
4584 if (!(status&1))
4585 {
4586 errno = EVMSERR;
4587 vaxc$errno = status;
4588 return 0;
4589 }
4590 /* read the requested record - index is in uname */
4591 uaf_rab.rab$l_kbf = uname;
4592 uaf_rab.rab$b_ksz = strlen (uname);
4593 uaf_rab.rab$b_rac = RAB$C_KEY;
4594 uaf_rab.rab$l_ubf = (char *)&retuaf;
4595 uaf_rab.rab$w_usz = sizeof retuaf;
4596 status = SYS$GET (&uaf_rab);
4597 if (!(status&1))
4598 {
4599 errno = EVMSERR;
4600 vaxc$errno = status;
4601 return 0;
4602 }
4603 /* close the User Authorization File */
4604 status = SYS$DISCONNECT (&uaf_rab);
4605 if (!(status&1))
4606 {
4607 errno = EVMSERR;
4608 vaxc$errno = status;
4609 return 0;
4610 }
4611 status = SYS$CLOSE (&uaf_fab);
4612 if (!(status&1))
4613 {
4614 errno = EVMSERR;
4615 vaxc$errno = status;
4616 return 0;
4617 }
4618 return &retuaf;
4619 }
4620
4621 struct UAF *
4622 get_uaf_uic (uic)
4623 unsigned long uic;
4624 {
4625 register status;
4626 struct FAB uaf_fab;
4627 struct RAB uaf_rab;
4628
4629 uaf_fab = cc$rms_fab;
4630 uaf_rab = cc$rms_rab;
4631 /* initialize fab fields */
4632 uaf_fab.fab$l_fna = "SYS$SYSTEM:SYSUAF.DAT";
4633 uaf_fab.fab$b_fns = 21;
4634 uaf_fab.fab$b_fac = FAB$M_GET;
4635 uaf_fab.fab$b_org = FAB$C_IDX;
4636 uaf_fab.fab$b_shr = FAB$M_GET|FAB$M_PUT|FAB$M_UPD|FAB$M_DEL;
4637 /* initialize rab fields */
4638 uaf_rab.rab$l_fab = &uaf_fab;
4639 /* open the User Authorization File */
4640 status = SYS$OPEN (&uaf_fab);
4641 if (!(status&1))
4642 {
4643 errno = EVMSERR;
4644 vaxc$errno = status;
4645 return 0;
4646 }
4647 status = SYS$CONNECT (&uaf_rab);
4648 if (!(status&1))
4649 {
4650 errno = EVMSERR;
4651 vaxc$errno = status;
4652 return 0;
4653 }
4654 /* read the requested record - index is in uic */
4655 uaf_rab.rab$b_krf = 1; /* 1st alternate key */
4656 uaf_rab.rab$l_kbf = (char *) &uic;
4657 uaf_rab.rab$b_ksz = sizeof uic;
4658 uaf_rab.rab$b_rac = RAB$C_KEY;
4659 uaf_rab.rab$l_ubf = (char *)&retuaf;
4660 uaf_rab.rab$w_usz = sizeof retuaf;
4661 status = SYS$GET (&uaf_rab);
4662 if (!(status&1))
4663 {
4664 errno = EVMSERR;
4665 vaxc$errno = status;
4666 return 0;
4667 }
4668 /* close the User Authorization File */
4669 status = SYS$DISCONNECT (&uaf_rab);
4670 if (!(status&1))
4671 {
4672 errno = EVMSERR;
4673 vaxc$errno = status;
4674 return 0;
4675 }
4676 status = SYS$CLOSE (&uaf_fab);
4677 if (!(status&1))
4678 {
4679 errno = EVMSERR;
4680 vaxc$errno = status;
4681 return 0;
4682 }
4683 return &retuaf;
4684 }
4685
4686 static struct passwd retpw;
4687
4688 struct passwd *
4689 cnv_uaf_pw (up)
4690 struct UAF * up;
4691 {
4692 char * ptr;
4693
4694 /* copy these out first because if the username is 32 chars, the next
4695 section will overwrite the first byte of the UIC */
4696 retpw.pw_uid = up->uaf$w_mem;
4697 retpw.pw_gid = up->uaf$w_grp;
4698
4699 /* I suppose this is not the best style, to possibly overwrite one
4700 byte beyond the end of the field, but what the heck... */
4701 ptr = &up->uaf$t_username[UAF$S_USERNAME];
4702 while (ptr[-1] == ' ')
4703 ptr--;
4704 *ptr = '\0';
4705 strcpy (retpw.pw_name, up->uaf$t_username);
4706
4707 /* the rest of these are counted ascii strings */
4708 strncpy (retpw.pw_gecos, &up->uaf$t_owner[1], up->uaf$t_owner[0]);
4709 retpw.pw_gecos[up->uaf$t_owner[0]] = '\0';
4710 strncpy (retpw.pw_dir, &up->uaf$t_defdev[1], up->uaf$t_defdev[0]);
4711 retpw.pw_dir[up->uaf$t_defdev[0]] = '\0';
4712 strncat (retpw.pw_dir, &up->uaf$t_defdir[1], up->uaf$t_defdir[0]);
4713 retpw.pw_dir[up->uaf$t_defdev[0] + up->uaf$t_defdir[0]] = '\0';
4714 strncpy (retpw.pw_shell, &up->uaf$t_defcli[1], up->uaf$t_defcli[0]);
4715 retpw.pw_shell[up->uaf$t_defcli[0]] = '\0';
4716
4717 return &retpw;
4718 }
4719 #else /* not READ_SYSUAF */
4720 static struct passwd retpw;
4721 #endif /* not READ_SYSUAF */
4722
4723 struct passwd *
4724 getpwnam (name)
4725 char * name;
4726 {
4727 #ifdef READ_SYSUAF
4728 struct UAF *up;
4729 #else
4730 char * user;
4731 char * dir;
4732 unsigned char * full;
4733 #endif /* READ_SYSUAF */
4734 char *ptr = name;
4735
4736 while (*ptr)
4737 {
4738 if ('a' <= *ptr && *ptr <= 'z')
4739 *ptr -= 040;
4740 ptr++;
4741 }
4742 #ifdef READ_SYSUAF
4743 if (!(up = get_uaf_name (name)))
4744 return 0;
4745 return cnv_uaf_pw (up);
4746 #else
4747 if (strcmp (name, getenv ("USER")) == 0)
4748 {
4749 retpw.pw_uid = getuid ();
4750 retpw.pw_gid = getgid ();
4751 strcpy (retpw.pw_name, name);
4752 if (full = egetenv ("FULLNAME"))
4753 strcpy (retpw.pw_gecos, full);
4754 else
4755 *retpw.pw_gecos = '\0';
4756 strcpy (retpw.pw_dir, egetenv ("HOME"));
4757 *retpw.pw_shell = '\0';
4758 return &retpw;
4759 }
4760 else
4761 return 0;
4762 #endif /* not READ_SYSUAF */
4763 }
4764
4765 struct passwd *
4766 getpwuid (uid)
4767 unsigned long uid;
4768 {
4769 #ifdef READ_SYSUAF
4770 struct UAF * up;
4771
4772 if (!(up = get_uaf_uic (uid)))
4773 return 0;
4774 return cnv_uaf_pw (up);
4775 #else
4776 if (uid == sys_getuid ())
4777 return getpwnam (egetenv ("USER"));
4778 else
4779 return 0;
4780 #endif /* not READ_SYSUAF */
4781 }
4782
4783 /* return total address space available to the current process. This is
4784 the sum of the current p0 size, p1 size and free page table entries
4785 available. */
4786 int
4787 vlimit ()
4788 {
4789 int item_code;
4790 unsigned long free_pages;
4791 unsigned long frep0va;
4792 unsigned long frep1va;
4793 register status;
4794
4795 item_code = JPI$_FREPTECNT;
4796 if (((status = LIB$GETJPI (&item_code, 0, 0, &free_pages)) & 1) == 0)
4797 {
4798 errno = EVMSERR;
4799 vaxc$errno = status;
4800 return -1;
4801 }
4802 free_pages *= 512;
4803
4804 item_code = JPI$_FREP0VA;
4805 if (((status = LIB$GETJPI (&item_code, 0, 0, &frep0va)) & 1) == 0)
4806 {
4807 errno = EVMSERR;
4808 vaxc$errno = status;
4809 return -1;
4810 }
4811 item_code = JPI$_FREP1VA;
4812 if (((status = LIB$GETJPI (&item_code, 0, 0, &frep1va)) & 1) == 0)
4813 {
4814 errno = EVMSERR;
4815 vaxc$errno = status;
4816 return -1;
4817 }
4818
4819 return free_pages + frep0va + (0x7fffffff - frep1va);
4820 }
4821
4822 int
4823 define_logical_name (varname, string)
4824 char *varname;
4825 char *string;
4826 {
4827 struct dsc$descriptor_s strdsc =
4828 {strlen (string), DSC$K_DTYPE_T, DSC$K_CLASS_S, string};
4829 struct dsc$descriptor_s envdsc =
4830 {strlen (varname), DSC$K_DTYPE_T, DSC$K_CLASS_S, varname};
4831 struct dsc$descriptor_s lnmdsc =
4832 {7, DSC$K_DTYPE_T, DSC$K_CLASS_S, "LNM$JOB"};
4833
4834 return LIB$SET_LOGICAL (&envdsc, &strdsc, &lnmdsc, 0, 0);
4835 }
4836
4837 int
4838 delete_logical_name (varname)
4839 char *varname;
4840 {
4841 struct dsc$descriptor_s envdsc =
4842 {strlen (varname), DSC$K_DTYPE_T, DSC$K_CLASS_S, varname};
4843 struct dsc$descriptor_s lnmdsc =
4844 {7, DSC$K_DTYPE_T, DSC$K_CLASS_S, "LNM$JOB"};
4845
4846 return LIB$DELETE_LOGICAL (&envdsc, &lnmdsc);
4847 }
4848
4849 int
4850 ulimit ()
4851 {
4852 return 0;
4853 }
4854
4855 int
4856 setpgrp ()
4857 {
4858 return 0;
4859 }
4860
4861 int
4862 execvp ()
4863 {
4864 error ("execvp system call not implemented");
4865 return -1;
4866 }
4867
4868 int
4869 rename (from, to)
4870 char *from, *to;
4871 {
4872 int status;
4873 struct FAB from_fab = cc$rms_fab, to_fab = cc$rms_fab;
4874 struct NAM from_nam = cc$rms_nam, to_nam = cc$rms_nam;
4875 char from_esn[NAM$C_MAXRSS];
4876 char to_esn[NAM$C_MAXRSS];
4877
4878 from_fab.fab$l_fna = from;
4879 from_fab.fab$b_fns = strlen (from);
4880 from_fab.fab$l_nam = &from_nam;
4881 from_fab.fab$l_fop = FAB$M_NAM;
4882
4883 from_nam.nam$l_esa = from_esn;
4884 from_nam.nam$b_ess = sizeof from_esn;
4885
4886 to_fab.fab$l_fna = to;
4887 to_fab.fab$b_fns = strlen (to);
4888 to_fab.fab$l_nam = &to_nam;
4889 to_fab.fab$l_fop = FAB$M_NAM;
4890
4891 to_nam.nam$l_esa = to_esn;
4892 to_nam.nam$b_ess = sizeof to_esn;
4893
4894 status = SYS$RENAME (&from_fab, 0, 0, &to_fab);
4895
4896 if (status & 1)
4897 return 0;
4898 else
4899 {
4900 if (status == RMS$_DEV)
4901 errno = EXDEV;
4902 else
4903 errno = EVMSERR;
4904 vaxc$errno = status;
4905 return -1;
4906 }
4907 }
4908
4909 /* This function renames a file like `rename', but it strips
4910 the version number from the "to" filename, such that the "to" file is
4911 will always be a new version. It also sets the file protection once it is
4912 finished. The protection that we will use is stored in fab_final_pro,
4913 and was set when we did a creat_copy_attrs to create the file that we
4914 are renaming.
4915
4916 We could use the chmod function, but Eunichs uses 3 bits per user category
4917 to describe the protection, and VMS uses 4 (write and delete are separate
4918 bits). To maintain portability, the VMS implementation of `chmod' wires
4919 the W and D bits together. */
4920
4921
4922 static struct fibdef fib; /* We need this initialized to zero */
4923 char vms_file_written[NAM$C_MAXRSS];
4924
4925 int
4926 rename_sans_version (from,to)
4927 char *from, *to;
4928 {
4929 short int chan;
4930 int stat;
4931 short int iosb[4];
4932 int status;
4933 struct FAB to_fab = cc$rms_fab;
4934 struct NAM to_nam = cc$rms_nam;
4935 struct dsc$descriptor fib_d ={sizeof (fib),0,0,(char*) &fib};
4936 struct dsc$descriptor fib_attr[2]
4937 = {{sizeof (fab_final_pro),ATR$C_FPRO,0,(char*) &fab_final_pro},{0,0,0,0}};
4938 char to_esn[NAM$C_MAXRSS];
4939
4940 $DESCRIPTOR (disk,to_esn);
4941
4942 to_fab.fab$l_fna = to;
4943 to_fab.fab$b_fns = strlen (to);
4944 to_fab.fab$l_nam = &to_nam;
4945 to_fab.fab$l_fop = FAB$M_NAM;
4946
4947 to_nam.nam$l_esa = to_esn;
4948 to_nam.nam$b_ess = sizeof to_esn;
4949
4950 status = SYS$PARSE (&to_fab, 0, 0); /* figure out the full file name */
4951
4952 if (to_nam.nam$l_fnb && NAM$M_EXP_VER)
4953 *(to_nam.nam$l_ver) = '\0';
4954
4955 stat = rename (from, to_esn);
4956 if (stat < 0)
4957 return stat;
4958
4959 strcpy (vms_file_written, to_esn);
4960
4961 to_fab.fab$l_fna = vms_file_written; /* this points to the versionless name */
4962 to_fab.fab$b_fns = strlen (vms_file_written);
4963
4964 /* Now set the file protection to the correct value */
4965 SYS$OPEN (&to_fab, 0, 0); /* This fills in the nam$w_fid fields */
4966
4967 /* Copy these fields into the fib */
4968 fib.fib$r_fid_overlay.fib$w_fid[0] = to_nam.nam$w_fid[0];
4969 fib.fib$r_fid_overlay.fib$w_fid[1] = to_nam.nam$w_fid[1];
4970 fib.fib$r_fid_overlay.fib$w_fid[2] = to_nam.nam$w_fid[2];
4971
4972 SYS$CLOSE (&to_fab, 0, 0);
4973
4974 stat = SYS$ASSIGN (&disk, &chan, 0, 0); /* open a channel to the disk */
4975 if (!stat)
4976 LIB$SIGNAL (stat);
4977 stat = SYS$QIOW (0, chan, IO$_MODIFY, iosb, 0, 0, &fib_d,
4978 0, 0, 0, &fib_attr, 0);
4979 if (!stat)
4980 LIB$SIGNAL (stat);
4981 stat = SYS$DASSGN (chan);
4982 if (!stat)
4983 LIB$SIGNAL (stat);
4984 strcpy (vms_file_written, to_esn); /* We will write this to the terminal*/
4985 return 0;
4986 }
4987
4988 int
4989 link (file, new)
4990 char * file, * new;
4991 {
4992 register status;
4993 struct FAB fab;
4994 struct NAM nam;
4995 unsigned short fid[3];
4996 char esa[NAM$C_MAXRSS];
4997
4998 fab = cc$rms_fab;
4999 fab.fab$l_fop = FAB$M_OFP;
5000 fab.fab$l_fna = file;
5001 fab.fab$b_fns = strlen (file);
5002 fab.fab$l_nam = &nam;
5003
5004 nam = cc$rms_nam;
5005 nam.nam$l_esa = esa;
5006 nam.nam$b_ess = NAM$C_MAXRSS;
5007
5008 status = SYS$PARSE (&fab);
5009 if ((status & 1) == 0)
5010 {
5011 errno = EVMSERR;
5012 vaxc$errno = status;
5013 return -1;
5014 }
5015 status = SYS$SEARCH (&fab);
5016 if ((status & 1) == 0)
5017 {
5018 errno = EVMSERR;
5019 vaxc$errno = status;
5020 return -1;
5021 }
5022
5023 fid[0] = nam.nam$w_fid[0];
5024 fid[1] = nam.nam$w_fid[1];
5025 fid[2] = nam.nam$w_fid[2];
5026
5027 fab.fab$l_fna = new;
5028 fab.fab$b_fns = strlen (new);
5029
5030 status = SYS$PARSE (&fab);
5031 if ((status & 1) == 0)
5032 {
5033 errno = EVMSERR;
5034 vaxc$errno = status;
5035 return -1;
5036 }
5037
5038 nam.nam$w_fid[0] = fid[0];
5039 nam.nam$w_fid[1] = fid[1];
5040 nam.nam$w_fid[2] = fid[2];
5041
5042 nam.nam$l_esa = nam.nam$l_name;
5043 nam.nam$b_esl = nam.nam$b_name + nam.nam$b_type + nam.nam$b_ver;
5044
5045 status = SYS$ENTER (&fab);
5046 if ((status & 1) == 0)
5047 {
5048 errno = EVMSERR;
5049 vaxc$errno = status;
5050 return -1;
5051 }
5052
5053 return 0;
5054 }
5055
5056 void
5057 croak (badfunc)
5058 char *badfunc;
5059 {
5060 printf ("%s not yet implemented\r\n", badfunc);
5061 reset_sys_modes ();
5062 exit (1);
5063 }
5064
5065 long
5066 random ()
5067 {
5068 /* Arrange to return a range centered on zero. */
5069 return rand () - (1 << 30);
5070 }
5071
5072 void
5073 srandom (seed)
5074 {
5075 srand (seed);
5076 }
5077 #endif /* VMS */
5078 \f
5079 #ifdef AIXHFT
5080
5081 /* Called from init_sys_modes. */
5082 void
5083 hft_init ()
5084 {
5085 int junk;
5086
5087 /* If we're not on an HFT we shouldn't do any of this. We determine
5088 if we are on an HFT by trying to get an HFT error code. If this
5089 call fails, we're not on an HFT. */
5090 #ifdef IBMR2AIX
5091 if (ioctl (0, HFQERROR, &junk) < 0)
5092 return;
5093 #else /* not IBMR2AIX */
5094 if (ioctl (0, HFQEIO, 0) < 0)
5095 return;
5096 #endif /* not IBMR2AIX */
5097
5098 /* On AIX the default hft keyboard mapping uses backspace rather than delete
5099 as the rubout key's ASCII code. Here this is changed. The bug is that
5100 there's no way to determine the old mapping, so in reset_sys_modes
5101 we need to assume that the normal map had been present. Of course, this
5102 code also doesn't help if on a terminal emulator which doesn't understand
5103 HFT VTD's. */
5104 {
5105 struct hfbuf buf;
5106 struct hfkeymap keymap;
5107
5108 buf.hf_bufp = (char *)&keymap;
5109 buf.hf_buflen = sizeof (keymap);
5110 keymap.hf_nkeys = 2;
5111 keymap.hfkey[0].hf_kpos = 15;
5112 keymap.hfkey[0].hf_kstate = HFMAPCHAR | HFSHFNONE;
5113 #ifdef IBMR2AIX
5114 keymap.hfkey[0].hf_keyidh = '<';
5115 #else /* not IBMR2AIX */
5116 keymap.hfkey[0].hf_page = '<';
5117 #endif /* not IBMR2AIX */
5118 keymap.hfkey[0].hf_char = 127;
5119 keymap.hfkey[1].hf_kpos = 15;
5120 keymap.hfkey[1].hf_kstate = HFMAPCHAR | HFSHFSHFT;
5121 #ifdef IBMR2AIX
5122 keymap.hfkey[1].hf_keyidh = '<';
5123 #else /* not IBMR2AIX */
5124 keymap.hfkey[1].hf_page = '<';
5125 #endif /* not IBMR2AIX */
5126 keymap.hfkey[1].hf_char = 127;
5127 hftctl (0, HFSKBD, &buf);
5128 }
5129 /* The HFT system on AIX doesn't optimize for scrolling, so it's really ugly
5130 at times. */
5131 line_ins_del_ok = char_ins_del_ok = 0;
5132 }
5133
5134 /* Reset the rubout key to backspace. */
5135
5136 void
5137 hft_reset ()
5138 {
5139 struct hfbuf buf;
5140 struct hfkeymap keymap;
5141 int junk;
5142
5143 #ifdef IBMR2AIX
5144 if (ioctl (0, HFQERROR, &junk) < 0)
5145 return;
5146 #else /* not IBMR2AIX */
5147 if (ioctl (0, HFQEIO, 0) < 0)
5148 return;
5149 #endif /* not IBMR2AIX */
5150
5151 buf.hf_bufp = (char *)&keymap;
5152 buf.hf_buflen = sizeof (keymap);
5153 keymap.hf_nkeys = 2;
5154 keymap.hfkey[0].hf_kpos = 15;
5155 keymap.hfkey[0].hf_kstate = HFMAPCHAR | HFSHFNONE;
5156 #ifdef IBMR2AIX
5157 keymap.hfkey[0].hf_keyidh = '<';
5158 #else /* not IBMR2AIX */
5159 keymap.hfkey[0].hf_page = '<';
5160 #endif /* not IBMR2AIX */
5161 keymap.hfkey[0].hf_char = 8;
5162 keymap.hfkey[1].hf_kpos = 15;
5163 keymap.hfkey[1].hf_kstate = HFMAPCHAR | HFSHFSHFT;
5164 #ifdef IBMR2AIX
5165 keymap.hfkey[1].hf_keyidh = '<';
5166 #else /* not IBMR2AIX */
5167 keymap.hfkey[1].hf_page = '<';
5168 #endif /* not IBMR2AIX */
5169 keymap.hfkey[1].hf_char = 8;
5170 hftctl (0, HFSKBD, &buf);
5171 }
5172
5173 #endif /* AIXHFT */
5174
5175 #ifdef USE_DL_STUBS
5176
5177 /* These are included on Sunos 4.1 when we do not use shared libraries.
5178 X11 libraries may refer to these functions but (we hope) do not
5179 actually call them. */
5180
5181 void *
5182 dlopen ()
5183 {
5184 return 0;
5185 }
5186
5187 void *
5188 dlsym ()
5189 {
5190 return 0;
5191 }
5192
5193 int
5194 dlclose ()
5195 {
5196 return -1;
5197 }
5198
5199 #endif /* USE_DL_STUBS */
5200 \f
5201 #ifndef BSTRING
5202
5203 #ifndef bzero
5204
5205 void
5206 bzero (b, length)
5207 register char *b;
5208 register int length;
5209 {
5210 #ifdef VMS
5211 short zero = 0;
5212 long max_str = 65535;
5213
5214 while (length > max_str) {
5215 (void) LIB$MOVC5 (&zero, &zero, &zero, &max_str, b);
5216 length -= max_str;
5217 b += max_str;
5218 }
5219 max_str = length;
5220 (void) LIB$MOVC5 (&zero, &zero, &zero, &max_str, b);
5221 #else
5222 while (length-- > 0)
5223 *b++ = 0;
5224 #endif /* not VMS */
5225 }
5226
5227 #endif /* no bzero */
5228 #endif /* BSTRING */
5229
5230 #if (!defined (BSTRING) && !defined (bcopy)) || defined (NEED_BCOPY)
5231 #undef bcopy
5232
5233 /* Saying `void' requires a declaration, above, where bcopy is used
5234 and that declaration causes pain for systems where bcopy is a macro. */
5235 bcopy (b1, b2, length)
5236 register char *b1;
5237 register char *b2;
5238 register int length;
5239 {
5240 #ifdef VMS
5241 long max_str = 65535;
5242
5243 while (length > max_str) {
5244 (void) LIB$MOVC3 (&max_str, b1, b2);
5245 length -= max_str;
5246 b1 += max_str;
5247 b2 += max_str;
5248 }
5249 max_str = length;
5250 (void) LIB$MOVC3 (&length, b1, b2);
5251 #else
5252 while (length-- > 0)
5253 *b2++ = *b1++;
5254 #endif /* not VMS */
5255 }
5256 #endif /* (!defined (BSTRING) && !defined (bcopy)) || defined (NEED_BCOPY) */
5257
5258 #ifndef BSTRING
5259 #ifndef bcmp
5260 int
5261 bcmp (b1, b2, length) /* This could be a macro! */
5262 register char *b1;
5263 register char *b2;
5264 register int length;
5265 {
5266 #ifdef VMS
5267 struct dsc$descriptor_s src1 = {length, DSC$K_DTYPE_T, DSC$K_CLASS_S, b1};
5268 struct dsc$descriptor_s src2 = {length, DSC$K_DTYPE_T, DSC$K_CLASS_S, b2};
5269
5270 return STR$COMPARE (&src1, &src2);
5271 #else
5272 while (length-- > 0)
5273 if (*b1++ != *b2++)
5274 return 1;
5275
5276 return 0;
5277 #endif /* not VMS */
5278 }
5279 #endif /* no bcmp */
5280 #endif /* not BSTRING */
5281 \f
5282 #ifndef HAVE_STRSIGNAL
5283 char *
5284 strsignal (code)
5285 int code;
5286 {
5287 char *signame = 0;
5288
5289 if (0 <= code && code < NSIG)
5290 {
5291 #ifdef VMS
5292 signame = sys_errlist[code];
5293 #else
5294 /* Cast to suppress warning if the table has const char *. */
5295 signame = (char *) sys_siglist[code];
5296 #endif
5297 }
5298
5299 return signame;
5300 }
5301 #endif /* HAVE_STRSIGNAL */
5302
5303 /* arch-tag: edb43589-4e09-4544-b325-978b5b121dcf
5304 (do not change this comment) */
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