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