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* syssignal.h: Declare main_thread.
[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 SIGNAL_THREAD_CHECK (SIGALRM);
2476 if (read_alarm_should_throw)
2477 longjmp (read_alarm_throw, 1);
2478 }
2479
2480 #ifndef WINDOWSNT
2481 /* Only rfds are checked. */
2482 int
2483 sys_select (nfds, rfds, wfds, efds, timeout)
2484 int nfds;
2485 SELECT_TYPE *rfds, *wfds, *efds;
2486 EMACS_TIME *timeout;
2487 {
2488 int ravail = 0;
2489 SELECT_TYPE orfds;
2490 int timeoutval;
2491 int *local_timeout;
2492 extern int proc_buffered_char[];
2493 #ifndef subprocesses
2494 int process_tick = 0, update_tick = 0;
2495 #else
2496 extern int process_tick, update_tick;
2497 #endif
2498 unsigned char buf;
2499
2500 #if defined (HAVE_SELECT) && defined (HAVE_X_WINDOWS)
2501 /* If we're using X, then the native select will work; we only need the
2502 emulation for non-X usage. */
2503 if (!NILP (Vwindow_system))
2504 return select (nfds, rfds, wfds, efds, timeout);
2505 #endif
2506 timeoutval = timeout ? EMACS_SECS (*timeout) : 100000;
2507 local_timeout = &timeoutval;
2508 FD_ZERO (&orfds);
2509 if (rfds)
2510 {
2511 orfds = *rfds;
2512 FD_ZERO (rfds);
2513 }
2514 if (wfds)
2515 FD_ZERO (wfds);
2516 if (efds)
2517 FD_ZERO (efds);
2518
2519 /* If we are looking only for the terminal, with no timeout,
2520 just read it and wait -- that's more efficient. */
2521 if (*local_timeout == 100000 && process_tick == update_tick
2522 && FD_ISSET (0, &orfds))
2523 {
2524 int fd;
2525 for (fd = 1; fd < nfds; ++fd)
2526 if (FD_ISSET (fd, &orfds))
2527 goto hardway;
2528 if (! detect_input_pending ())
2529 read_input_waiting ();
2530 FD_SET (0, rfds);
2531 return 1;
2532 }
2533
2534 hardway:
2535 /* Once a second, till the timer expires, check all the flagged read
2536 * descriptors to see if any input is available. If there is some then
2537 * set the corresponding bit in the return copy of rfds.
2538 */
2539 while (1)
2540 {
2541 register int to_check, fd;
2542
2543 if (rfds)
2544 {
2545 for (to_check = nfds, fd = 0; --to_check >= 0; fd++)
2546 {
2547 if (FD_ISSET (fd, &orfds))
2548 {
2549 int avail = 0, status = 0;
2550
2551 if (fd == 0)
2552 avail = detect_input_pending (); /* Special keyboard handler */
2553 else
2554 {
2555 #ifdef FIONREAD
2556 status = ioctl (fd, FIONREAD, &avail);
2557 #else /* no FIONREAD */
2558 /* Hoping it will return -1 if nothing available
2559 or 0 if all 0 chars requested are read. */
2560 if (proc_buffered_char[fd] >= 0)
2561 avail = 1;
2562 else
2563 {
2564 avail = read (fd, &buf, 1);
2565 if (avail > 0)
2566 proc_buffered_char[fd] = buf;
2567 }
2568 #endif /* no FIONREAD */
2569 }
2570 if (status >= 0 && avail > 0)
2571 {
2572 FD_SET (fd, rfds);
2573 ravail++;
2574 }
2575 }
2576 }
2577 }
2578 if (*local_timeout == 0 || ravail != 0 || process_tick != update_tick)
2579 break;
2580
2581 turn_on_atimers (0);
2582 signal (SIGALRM, select_alarm);
2583 select_alarmed = 0;
2584 alarm (SELECT_PAUSE);
2585
2586 /* Wait for a SIGALRM (or maybe a SIGTINT) */
2587 while (select_alarmed == 0 && *local_timeout != 0
2588 && process_tick == update_tick)
2589 {
2590 /* If we are interested in terminal input,
2591 wait by reading the terminal.
2592 That makes instant wakeup for terminal input at least. */
2593 if (FD_ISSET (0, &orfds))
2594 {
2595 read_input_waiting ();
2596 if (detect_input_pending ())
2597 select_alarmed = 1;
2598 }
2599 else
2600 pause ();
2601 }
2602 (*local_timeout) -= SELECT_PAUSE;
2603
2604 /* Reset the old alarm if there was one. */
2605 turn_on_atimers (1);
2606
2607 if (*local_timeout == 0) /* Stop on timer being cleared */
2608 break;
2609 }
2610 return ravail;
2611 }
2612 #endif /* not WINDOWSNT */
2613
2614 /* Read keyboard input into the standard buffer,
2615 waiting for at least one character. */
2616
2617 void
2618 read_input_waiting ()
2619 {
2620 int nread, i;
2621 extern int quit_char;
2622
2623 if (read_socket_hook)
2624 {
2625 struct input_event hold_quit;
2626
2627 EVENT_INIT (hold_quit);
2628 hold_quit.kind = NO_EVENT;
2629
2630 read_alarm_should_throw = 0;
2631 if (! setjmp (read_alarm_throw))
2632 nread = (*read_socket_hook) (0, 1, &hold_quit);
2633 else
2634 nread = -1;
2635
2636 if (hold_quit.kind != NO_EVENT)
2637 kbd_buffer_store_event (&hold_quit);
2638 }
2639 else
2640 {
2641 struct input_event e;
2642 char buf[3];
2643 nread = read (fileno (stdin), buf, 1);
2644 EVENT_INIT (e);
2645
2646 /* Scan the chars for C-g and store them in kbd_buffer. */
2647 e.kind = ASCII_KEYSTROKE_EVENT;
2648 e.frame_or_window = selected_frame;
2649 e.modifiers = 0;
2650 for (i = 0; i < nread; i++)
2651 {
2652 /* Convert chars > 0177 to meta events if desired.
2653 We do this under the same conditions that read_avail_input does. */
2654 if (read_socket_hook == 0)
2655 {
2656 /* If the user says she has a meta key, then believe her. */
2657 if (meta_key == 1 && (buf[i] & 0x80))
2658 e.modifiers = meta_modifier;
2659 if (meta_key != 2)
2660 buf[i] &= ~0x80;
2661 }
2662
2663 XSETINT (e.code, buf[i]);
2664 kbd_buffer_store_event (&e);
2665 /* Don't look at input that follows a C-g too closely.
2666 This reduces lossage due to autorepeat on C-g. */
2667 if (buf[i] == quit_char)
2668 break;
2669 }
2670 }
2671 }
2672
2673 #endif /* not HAVE_SELECT */
2674 #endif /* not VMS */
2675 #endif /* not MSDOS */
2676 \f
2677 #ifdef BSD4_1
2678 void
2679 init_sigio (fd)
2680 int fd;
2681 {
2682 if (noninteractive)
2683 return;
2684 lmode = LINTRUP | lmode;
2685 ioctl (fd, TIOCLSET, &lmode);
2686 }
2687
2688 void
2689 reset_sigio ()
2690 {
2691 if (noninteractive)
2692 return;
2693 lmode = ~LINTRUP & lmode;
2694 ioctl (0, TIOCLSET, &lmode);
2695 }
2696
2697 void
2698 request_sigio ()
2699 {
2700 sigrelse (SIGTINT);
2701
2702 interrupts_deferred = 0;
2703 }
2704
2705 void
2706 unrequest_sigio ()
2707 {
2708 sighold (SIGTINT);
2709
2710 interrupts_deferred = 1;
2711 }
2712
2713 /* still inside #ifdef BSD4_1 */
2714 #ifdef subprocesses
2715
2716 int sigheld; /* Mask of held signals */
2717
2718 void
2719 sigholdx (signum)
2720 int signum;
2721 {
2722 sigheld |= sigbit (signum);
2723 sighold (signum);
2724 }
2725
2726 void
2727 sigisheld (signum)
2728 int signum;
2729 {
2730 sigheld |= sigbit (signum);
2731 }
2732
2733 void
2734 sigunhold (signum)
2735 int signum;
2736 {
2737 sigheld &= ~sigbit (signum);
2738 sigrelse (signum);
2739 }
2740
2741 void
2742 sigfree () /* Free all held signals */
2743 {
2744 int i;
2745 for (i = 0; i < NSIG; i++)
2746 if (sigheld & sigbit (i))
2747 sigrelse (i);
2748 sigheld = 0;
2749 }
2750
2751 int
2752 sigbit (i)
2753 {
2754 return 1 << (i - 1);
2755 }
2756 #endif /* subprocesses */
2757 #endif /* BSD4_1 */
2758 \f
2759 /* POSIX signals support - DJB */
2760 /* Anyone with POSIX signals should have ANSI C declarations */
2761
2762 #ifdef POSIX_SIGNALS
2763
2764 sigset_t empty_mask, full_mask;
2765
2766 signal_handler_t
2767 sys_signal (int signal_number, signal_handler_t action)
2768 {
2769 struct sigaction new_action, old_action;
2770 sigemptyset (&new_action.sa_mask);
2771 new_action.sa_handler = action;
2772 #if defined (SA_RESTART) && ! defined (BROKEN_SA_RESTART) && !defined(SYNC_INPUT)
2773 /* Emacs mostly works better with restartable system services. If this
2774 flag exists, we probably want to turn it on here.
2775 However, on some systems this resets the timeout of `select'
2776 which means that `select' never finishes if it keeps getting signals.
2777 BROKEN_SA_RESTART is defined on those systems. */
2778 /* It's not clear why the comment above says "mostly works better". --Stef
2779 When SYNC_INPUT is set, we don't want SA_RESTART because we need to poll
2780 for pending input so we need long-running syscalls to be interrupted
2781 after a signal that sets the interrupt_input_pending flag. */
2782 new_action.sa_flags = SA_RESTART;
2783 #else
2784 new_action.sa_flags = 0;
2785 #endif
2786 sigaction (signal_number, &new_action, &old_action);
2787 return (old_action.sa_handler);
2788 }
2789
2790 #ifndef __GNUC__
2791 /* If we're compiling with GCC, we don't need this function, since it
2792 can be written as a macro. */
2793 sigset_t
2794 sys_sigmask (int sig)
2795 {
2796 sigset_t mask;
2797 sigemptyset (&mask);
2798 sigaddset (&mask, sig);
2799 return mask;
2800 }
2801 #endif
2802
2803 /* I'd like to have these guys return pointers to the mask storage in here,
2804 but there'd be trouble if the code was saving multiple masks. I'll be
2805 safe and pass the structure. It normally won't be more than 2 bytes
2806 anyhow. - DJB */
2807
2808 sigset_t
2809 sys_sigblock (sigset_t new_mask)
2810 {
2811 sigset_t old_mask;
2812 sigprocmask (SIG_BLOCK, &new_mask, &old_mask);
2813 return (old_mask);
2814 }
2815
2816 sigset_t
2817 sys_sigunblock (sigset_t new_mask)
2818 {
2819 sigset_t old_mask;
2820 sigprocmask (SIG_UNBLOCK, &new_mask, &old_mask);
2821 return (old_mask);
2822 }
2823
2824 sigset_t
2825 sys_sigsetmask (sigset_t new_mask)
2826 {
2827 sigset_t old_mask;
2828 sigprocmask (SIG_SETMASK, &new_mask, &old_mask);
2829 return (old_mask);
2830 }
2831
2832 #endif /* POSIX_SIGNALS */
2833 \f
2834 #if !defined HAVE_STRSIGNAL && !HAVE_DECL_SYS_SIGLIST
2835 static char *my_sys_siglist[NSIG];
2836 # ifdef sys_siglist
2837 # undef sys_siglist
2838 # endif
2839 # define sys_siglist my_sys_siglist
2840 #endif
2841
2842 void
2843 init_signals ()
2844 {
2845 #ifdef POSIX_SIGNALS
2846 sigemptyset (&empty_mask);
2847 sigfillset (&full_mask);
2848 #endif
2849
2850 #if !defined HAVE_STRSIGNAL && !HAVE_DECL_SYS_SIGLIST
2851 if (! initialized)
2852 {
2853 # ifdef SIGABRT
2854 sys_siglist[SIGABRT] = "Aborted";
2855 # endif
2856 # ifdef SIGAIO
2857 sys_siglist[SIGAIO] = "LAN I/O interrupt";
2858 # endif
2859 # ifdef SIGALRM
2860 sys_siglist[SIGALRM] = "Alarm clock";
2861 # endif
2862 # ifdef SIGBUS
2863 sys_siglist[SIGBUS] = "Bus error";
2864 # endif
2865 # ifdef SIGCLD
2866 sys_siglist[SIGCLD] = "Child status changed";
2867 # endif
2868 # ifdef SIGCHLD
2869 sys_siglist[SIGCHLD] = "Child status changed";
2870 # endif
2871 # ifdef SIGCONT
2872 sys_siglist[SIGCONT] = "Continued";
2873 # endif
2874 # ifdef SIGDANGER
2875 sys_siglist[SIGDANGER] = "Swap space dangerously low";
2876 # endif
2877 # ifdef SIGDGNOTIFY
2878 sys_siglist[SIGDGNOTIFY] = "Notification message in queue";
2879 # endif
2880 # ifdef SIGEMT
2881 sys_siglist[SIGEMT] = "Emulation trap";
2882 # endif
2883 # ifdef SIGFPE
2884 sys_siglist[SIGFPE] = "Arithmetic exception";
2885 # endif
2886 # ifdef SIGFREEZE
2887 sys_siglist[SIGFREEZE] = "SIGFREEZE";
2888 # endif
2889 # ifdef SIGGRANT
2890 sys_siglist[SIGGRANT] = "Monitor mode granted";
2891 # endif
2892 # ifdef SIGHUP
2893 sys_siglist[SIGHUP] = "Hangup";
2894 # endif
2895 # ifdef SIGILL
2896 sys_siglist[SIGILL] = "Illegal instruction";
2897 # endif
2898 # ifdef SIGINT
2899 sys_siglist[SIGINT] = "Interrupt";
2900 # endif
2901 # ifdef SIGIO
2902 sys_siglist[SIGIO] = "I/O possible";
2903 # endif
2904 # ifdef SIGIOINT
2905 sys_siglist[SIGIOINT] = "I/O intervention required";
2906 # endif
2907 # ifdef SIGIOT
2908 sys_siglist[SIGIOT] = "IOT trap";
2909 # endif
2910 # ifdef SIGKILL
2911 sys_siglist[SIGKILL] = "Killed";
2912 # endif
2913 # ifdef SIGLOST
2914 sys_siglist[SIGLOST] = "Resource lost";
2915 # endif
2916 # ifdef SIGLWP
2917 sys_siglist[SIGLWP] = "SIGLWP";
2918 # endif
2919 # ifdef SIGMSG
2920 sys_siglist[SIGMSG] = "Monitor mode data available";
2921 # endif
2922 # ifdef SIGPHONE
2923 sys_siglist[SIGWIND] = "SIGPHONE";
2924 # endif
2925 # ifdef SIGPIPE
2926 sys_siglist[SIGPIPE] = "Broken pipe";
2927 # endif
2928 # ifdef SIGPOLL
2929 sys_siglist[SIGPOLL] = "Pollable event occurred";
2930 # endif
2931 # ifdef SIGPROF
2932 sys_siglist[SIGPROF] = "Profiling timer expired";
2933 # endif
2934 # ifdef SIGPTY
2935 sys_siglist[SIGPTY] = "PTY I/O interrupt";
2936 # endif
2937 # ifdef SIGPWR
2938 sys_siglist[SIGPWR] = "Power-fail restart";
2939 # endif
2940 # ifdef SIGQUIT
2941 sys_siglist[SIGQUIT] = "Quit";
2942 # endif
2943 # ifdef SIGRETRACT
2944 sys_siglist[SIGRETRACT] = "Need to relinguish monitor mode";
2945 # endif
2946 # ifdef SIGSAK
2947 sys_siglist[SIGSAK] = "Secure attention";
2948 # endif
2949 # ifdef SIGSEGV
2950 sys_siglist[SIGSEGV] = "Segmentation violation";
2951 # endif
2952 # ifdef SIGSOUND
2953 sys_siglist[SIGSOUND] = "Sound completed";
2954 # endif
2955 # ifdef SIGSTOP
2956 sys_siglist[SIGSTOP] = "Stopped (signal)";
2957 # endif
2958 # ifdef SIGSTP
2959 sys_siglist[SIGSTP] = "Stopped (user)";
2960 # endif
2961 # ifdef SIGSYS
2962 sys_siglist[SIGSYS] = "Bad argument to system call";
2963 # endif
2964 # ifdef SIGTERM
2965 sys_siglist[SIGTERM] = "Terminated";
2966 # endif
2967 # ifdef SIGTHAW
2968 sys_siglist[SIGTHAW] = "SIGTHAW";
2969 # endif
2970 # ifdef SIGTRAP
2971 sys_siglist[SIGTRAP] = "Trace/breakpoint trap";
2972 # endif
2973 # ifdef SIGTSTP
2974 sys_siglist[SIGTSTP] = "Stopped (user)";
2975 # endif
2976 # ifdef SIGTTIN
2977 sys_siglist[SIGTTIN] = "Stopped (tty input)";
2978 # endif
2979 # ifdef SIGTTOU
2980 sys_siglist[SIGTTOU] = "Stopped (tty output)";
2981 # endif
2982 # ifdef SIGURG
2983 sys_siglist[SIGURG] = "Urgent I/O condition";
2984 # endif
2985 # ifdef SIGUSR1
2986 sys_siglist[SIGUSR1] = "User defined signal 1";
2987 # endif
2988 # ifdef SIGUSR2
2989 sys_siglist[SIGUSR2] = "User defined signal 2";
2990 # endif
2991 # ifdef SIGVTALRM
2992 sys_siglist[SIGVTALRM] = "Virtual timer expired";
2993 # endif
2994 # ifdef SIGWAITING
2995 sys_siglist[SIGWAITING] = "Process's LWPs are blocked";
2996 # endif
2997 # ifdef SIGWINCH
2998 sys_siglist[SIGWINCH] = "Window size changed";
2999 # endif
3000 # ifdef SIGWIND
3001 sys_siglist[SIGWIND] = "SIGWIND";
3002 # endif
3003 # ifdef SIGXCPU
3004 sys_siglist[SIGXCPU] = "CPU time limit exceeded";
3005 # endif
3006 # ifdef SIGXFSZ
3007 sys_siglist[SIGXFSZ] = "File size limit exceeded";
3008 # endif
3009 }
3010 #endif /* !defined HAVE_STRSIGNAL && !defined HAVE_DECL_SYS_SIGLIST */
3011 }
3012 \f
3013 #ifndef HAVE_RANDOM
3014 #ifdef random
3015 #define HAVE_RANDOM
3016 #endif
3017 #endif
3018
3019 /* Figure out how many bits the system's random number generator uses.
3020 `random' and `lrand48' are assumed to return 31 usable bits.
3021 BSD `rand' returns a 31 bit value but the low order bits are unusable;
3022 so we'll shift it and treat it like the 15-bit USG `rand'. */
3023
3024 #ifndef RAND_BITS
3025 # ifdef HAVE_RANDOM
3026 # define RAND_BITS 31
3027 # else /* !HAVE_RANDOM */
3028 # ifdef HAVE_LRAND48
3029 # define RAND_BITS 31
3030 # define random lrand48
3031 # else /* !HAVE_LRAND48 */
3032 # define RAND_BITS 15
3033 # if RAND_MAX == 32767
3034 # define random rand
3035 # else /* RAND_MAX != 32767 */
3036 # if RAND_MAX == 2147483647
3037 # define random() (rand () >> 16)
3038 # else /* RAND_MAX != 2147483647 */
3039 # ifdef USG
3040 # define random rand
3041 # else
3042 # define random() (rand () >> 16)
3043 # endif /* !USG */
3044 # endif /* RAND_MAX != 2147483647 */
3045 # endif /* RAND_MAX != 32767 */
3046 # endif /* !HAVE_LRAND48 */
3047 # endif /* !HAVE_RANDOM */
3048 #endif /* !RAND_BITS */
3049
3050 void
3051 seed_random (arg)
3052 long arg;
3053 {
3054 #ifdef HAVE_RANDOM
3055 srandom ((unsigned int)arg);
3056 #else
3057 # ifdef HAVE_LRAND48
3058 srand48 (arg);
3059 # else
3060 srand ((unsigned int)arg);
3061 # endif
3062 #endif
3063 }
3064
3065 /*
3066 * Build a full Emacs-sized word out of whatever we've got.
3067 * This suffices even for a 64-bit architecture with a 15-bit rand.
3068 */
3069 long
3070 get_random ()
3071 {
3072 long val = random ();
3073 #if VALBITS > RAND_BITS
3074 val = (val << RAND_BITS) ^ random ();
3075 #if VALBITS > 2*RAND_BITS
3076 val = (val << RAND_BITS) ^ random ();
3077 #if VALBITS > 3*RAND_BITS
3078 val = (val << RAND_BITS) ^ random ();
3079 #if VALBITS > 4*RAND_BITS
3080 val = (val << RAND_BITS) ^ random ();
3081 #endif /* need at least 5 */
3082 #endif /* need at least 4 */
3083 #endif /* need at least 3 */
3084 #endif /* need at least 2 */
3085 return val & ((1L << VALBITS) - 1);
3086 }
3087 \f
3088 #ifdef WRONG_NAME_INSQUE
3089
3090 insque (q,p)
3091 caddr_t q,p;
3092 {
3093 _insque (q,p);
3094 }
3095
3096 #endif
3097 \f
3098 #ifdef VMS
3099
3100 #ifdef getenv
3101 /* If any place else asks for the TERM variable,
3102 allow it to be overridden with the EMACS_TERM variable
3103 before attempting to translate the logical name TERM. As a last
3104 resort, ask for VAX C's special idea of the TERM variable. */
3105 #undef getenv
3106 char *
3107 sys_getenv (name)
3108 char *name;
3109 {
3110 register char *val;
3111 static char buf[256];
3112 static struct dsc$descriptor_s equiv
3113 = {sizeof (buf), DSC$K_DTYPE_T, DSC$K_CLASS_S, buf};
3114 static struct dsc$descriptor_s d_name
3115 = {0, DSC$K_DTYPE_T, DSC$K_CLASS_S, 0};
3116 short eqlen;
3117
3118 if (!strcmp (name, "TERM"))
3119 {
3120 val = (char *) getenv ("EMACS_TERM");
3121 if (val)
3122 return val;
3123 }
3124
3125 d_name.dsc$w_length = strlen (name);
3126 d_name.dsc$a_pointer = name;
3127 if (LIB$SYS_TRNLOG (&d_name, &eqlen, &equiv) == 1)
3128 {
3129 char *str = (char *) xmalloc (eqlen + 1);
3130 bcopy (buf, str, eqlen);
3131 str[eqlen] = '\0';
3132 /* This is a storage leak, but a pain to fix. With luck,
3133 no one will ever notice. */
3134 return str;
3135 }
3136 return (char *) getenv (name);
3137 }
3138 #endif /* getenv */
3139
3140 #ifdef abort
3141 /* Since VMS doesn't believe in core dumps, the only way to debug this beast is
3142 to force a call on the debugger from within the image. */
3143 #undef abort
3144 sys_abort ()
3145 {
3146 reset_sys_modes ();
3147 LIB$SIGNAL (SS$_DEBUG);
3148 }
3149 #endif /* abort */
3150 #endif /* VMS */
3151 \f
3152 #ifdef VMS
3153 #ifdef LINK_CRTL_SHARE
3154 #ifdef SHARABLE_LIB_BUG
3155 /* Variables declared noshare and initialized in sharable libraries
3156 cannot be shared. The VMS linker incorrectly forces you to use a private
3157 version which is uninitialized... If not for this "feature", we
3158 could use the C library definition of sys_nerr and sys_errlist. */
3159 int sys_nerr = 35;
3160 char *sys_errlist[] =
3161 {
3162 "error 0",
3163 "not owner",
3164 "no such file or directory",
3165 "no such process",
3166 "interrupted system call",
3167 "i/o error",
3168 "no such device or address",
3169 "argument list too long",
3170 "exec format error",
3171 "bad file number",
3172 "no child process",
3173 "no more processes",
3174 "not enough memory",
3175 "permission denied",
3176 "bad address",
3177 "block device required",
3178 "mount devices busy",
3179 "file exists",
3180 "cross-device link",
3181 "no such device",
3182 "not a directory",
3183 "is a directory",
3184 "invalid argument",
3185 "file table overflow",
3186 "too many open files",
3187 "not a typewriter",
3188 "text file busy",
3189 "file too big",
3190 "no space left on device",
3191 "illegal seek",
3192 "read-only file system",
3193 "too many links",
3194 "broken pipe",
3195 "math argument",
3196 "result too large",
3197 "I/O stream empty",
3198 "vax/vms specific error code nontranslatable error"
3199 };
3200 #endif /* SHARABLE_LIB_BUG */
3201 #endif /* LINK_CRTL_SHARE */
3202 #endif /* VMS */
3203
3204 #ifndef HAVE_STRERROR
3205 #ifndef WINDOWSNT
3206 char *
3207 strerror (errnum)
3208 int errnum;
3209 {
3210 extern char *sys_errlist[];
3211 extern int sys_nerr;
3212
3213 if (errnum >= 0 && errnum < sys_nerr)
3214 return sys_errlist[errnum];
3215 return (char *) "Unknown error";
3216 }
3217 #endif /* not WINDOWSNT */
3218 #endif /* ! HAVE_STRERROR */
3219 \f
3220 int
3221 emacs_open (path, oflag, mode)
3222 const char *path;
3223 int oflag, mode;
3224 {
3225 register int rtnval;
3226
3227 #ifdef BSD4_1
3228 if (oflag & O_CREAT)
3229 return creat (path, mode);
3230 #endif
3231
3232 while ((rtnval = open (path, oflag, mode)) == -1
3233 && (errno == EINTR))
3234 QUIT;
3235 return (rtnval);
3236 }
3237
3238 int
3239 emacs_close (fd)
3240 int fd;
3241 {
3242 int did_retry = 0;
3243 register int rtnval;
3244
3245 while ((rtnval = close (fd)) == -1
3246 && (errno == EINTR))
3247 did_retry = 1;
3248
3249 /* If close is interrupted SunOS 4.1 may or may not have closed the
3250 file descriptor. If it did the second close will fail with
3251 errno = EBADF. That means we have succeeded. */
3252 if (rtnval == -1 && did_retry && errno == EBADF)
3253 return 0;
3254
3255 return rtnval;
3256 }
3257
3258 int
3259 emacs_read (fildes, buf, nbyte)
3260 int fildes;
3261 char *buf;
3262 unsigned int nbyte;
3263 {
3264 register int rtnval;
3265
3266 while ((rtnval = read (fildes, buf, nbyte)) == -1
3267 && (errno == EINTR))
3268 QUIT;
3269 return (rtnval);
3270 }
3271
3272 int
3273 emacs_write (fildes, buf, nbyte)
3274 int fildes;
3275 const char *buf;
3276 unsigned int nbyte;
3277 {
3278 register int rtnval, bytes_written;
3279
3280 bytes_written = 0;
3281
3282 while (nbyte > 0)
3283 {
3284 rtnval = write (fildes, buf, nbyte);
3285
3286 if (rtnval == -1)
3287 {
3288 if (errno == EINTR)
3289 {
3290 #ifdef SYNC_INPUT
3291 /* I originally used `QUIT' but that might causes files to
3292 be truncated if you hit C-g in the middle of it. --Stef */
3293 if (interrupt_input_pending)
3294 handle_async_input ();
3295 #endif
3296 continue;
3297 }
3298 else
3299 return (bytes_written ? bytes_written : -1);
3300 }
3301
3302 buf += rtnval;
3303 nbyte -= rtnval;
3304 bytes_written += rtnval;
3305 }
3306 return (bytes_written);
3307 }
3308 \f
3309 #ifdef USG
3310 /*
3311 * All of the following are for USG.
3312 *
3313 * On USG systems the system calls are INTERRUPTIBLE by signals
3314 * that the user program has elected to catch. Thus the system call
3315 * must be retried in these cases. To handle this without massive
3316 * changes in the source code, we remap the standard system call names
3317 * to names for our own functions in sysdep.c that do the system call
3318 * with retries. Actually, for portability reasons, it is good
3319 * programming practice, as this example shows, to limit all actual
3320 * system calls to a single occurrence in the source. Sure, this
3321 * adds an extra level of function call overhead but it is almost
3322 * always negligible. Fred Fish, Unisoft Systems Inc.
3323 */
3324
3325 /*
3326 * Warning, this function may not duplicate 4.2 action properly
3327 * under error conditions.
3328 */
3329
3330 #ifndef MAXPATHLEN
3331 /* In 4.1, param.h fails to define this. */
3332 #define MAXPATHLEN 1024
3333 #endif
3334
3335 #ifndef HAVE_GETWD
3336
3337 char *
3338 getwd (pathname)
3339 char *pathname;
3340 {
3341 char *npath, *spath;
3342 extern char *getcwd ();
3343
3344 BLOCK_INPUT; /* getcwd uses malloc */
3345 spath = npath = getcwd ((char *) 0, MAXPATHLEN);
3346 if (spath == 0)
3347 {
3348 UNBLOCK_INPUT;
3349 return spath;
3350 }
3351 /* On Altos 3068, getcwd can return @hostname/dir, so discard
3352 up to first slash. Should be harmless on other systems. */
3353 while (*npath && *npath != '/')
3354 npath++;
3355 strcpy (pathname, npath);
3356 free (spath); /* getcwd uses malloc */
3357 UNBLOCK_INPUT;
3358 return pathname;
3359 }
3360
3361 #endif /* HAVE_GETWD */
3362
3363 /*
3364 * Emulate rename using unlink/link. Note that this is
3365 * only partially correct. Also, doesn't enforce restriction
3366 * that files be of same type (regular->regular, dir->dir, etc).
3367 */
3368
3369 #ifndef HAVE_RENAME
3370
3371 rename (from, to)
3372 const char *from;
3373 const char *to;
3374 {
3375 if (access (from, 0) == 0)
3376 {
3377 unlink (to);
3378 if (link (from, to) == 0)
3379 if (unlink (from) == 0)
3380 return (0);
3381 }
3382 return (-1);
3383 }
3384
3385 #endif
3386
3387
3388 #ifdef HPUX
3389 #ifndef HAVE_PERROR
3390
3391 /* HPUX curses library references perror, but as far as we know
3392 it won't be called. Anyway this definition will do for now. */
3393
3394 perror ()
3395 {
3396 }
3397
3398 #endif /* not HAVE_PERROR */
3399 #endif /* HPUX */
3400
3401 #ifndef HAVE_DUP2
3402
3403 /*
3404 * Emulate BSD dup2. First close newd if it already exists.
3405 * Then, attempt to dup oldd. If not successful, call dup2 recursively
3406 * until we are, then close the unsuccessful ones.
3407 */
3408
3409 dup2 (oldd, newd)
3410 int oldd;
3411 int newd;
3412 {
3413 register int fd, ret;
3414
3415 emacs_close (newd);
3416
3417 #ifdef F_DUPFD
3418 return fcntl (oldd, F_DUPFD, newd);
3419 #else
3420 fd = dup (old);
3421 if (fd == -1)
3422 return -1;
3423 if (fd == new)
3424 return new;
3425 ret = dup2 (old,new);
3426 emacs_close (fd);
3427 return ret;
3428 #endif
3429 }
3430
3431 #endif /* not HAVE_DUP2 */
3432
3433 /*
3434 * Gettimeofday. Simulate as much as possible. Only accurate
3435 * to nearest second. Emacs doesn't use tzp so ignore it for now.
3436 * Only needed when subprocesses are defined.
3437 */
3438
3439 #ifdef subprocesses
3440 #ifndef VMS
3441 #ifndef HAVE_GETTIMEOFDAY
3442 #ifdef HAVE_TIMEVAL
3443
3444 /* ARGSUSED */
3445 int
3446 gettimeofday (tp, tzp)
3447 struct timeval *tp;
3448 struct timezone *tzp;
3449 {
3450 extern long time ();
3451
3452 tp->tv_sec = time ((long *)0);
3453 tp->tv_usec = 0;
3454 if (tzp != 0)
3455 tzp->tz_minuteswest = -1;
3456 return 0;
3457 }
3458
3459 #endif
3460 #endif
3461 #endif
3462 #endif /* subprocess && !HAVE_GETTIMEOFDAY && HAVE_TIMEVAL && !VMS */
3463
3464 /*
3465 * This function will go away as soon as all the stubs fixed. (fnf)
3466 */
3467
3468 void
3469 croak (badfunc)
3470 char *badfunc;
3471 {
3472 printf ("%s not yet implemented\r\n", badfunc);
3473 reset_sys_modes ();
3474 exit (1);
3475 }
3476
3477 #endif /* USG */
3478 \f
3479 /* Directory routines for systems that don't have them. */
3480
3481 #ifdef SYSV_SYSTEM_DIR
3482
3483 #include <dirent.h>
3484
3485 #if defined (BROKEN_CLOSEDIR) || !defined (HAVE_CLOSEDIR)
3486
3487 int
3488 closedir (dirp)
3489 register DIR *dirp; /* stream from opendir */
3490 {
3491 int rtnval;
3492
3493 rtnval = emacs_close (dirp->dd_fd);
3494
3495 /* Some systems (like Solaris) allocate the buffer and the DIR all
3496 in one block. Why in the world are we freeing this ourselves
3497 anyway? */
3498 #if ! (defined (sun) && defined (USG5_4))
3499 xfree ((char *) dirp->dd_buf); /* directory block defined in <dirent.h> */
3500 #endif
3501 xfree ((char *) dirp);
3502
3503 return rtnval;
3504 }
3505 #endif /* BROKEN_CLOSEDIR or not HAVE_CLOSEDIR */
3506 #endif /* SYSV_SYSTEM_DIR */
3507
3508 #ifdef NONSYSTEM_DIR_LIBRARY
3509
3510 DIR *
3511 opendir (filename)
3512 char *filename; /* name of directory */
3513 {
3514 register DIR *dirp; /* -> malloc'ed storage */
3515 register int fd; /* file descriptor for read */
3516 struct stat sbuf; /* result of fstat */
3517
3518 fd = emacs_open (filename, O_RDONLY, 0);
3519 if (fd < 0)
3520 return 0;
3521
3522 BLOCK_INPUT;
3523 if (fstat (fd, &sbuf) < 0
3524 || (sbuf.st_mode & S_IFMT) != S_IFDIR
3525 || (dirp = (DIR *) xmalloc (sizeof (DIR))) == 0)
3526 {
3527 emacs_close (fd);
3528 UNBLOCK_INPUT;
3529 return 0; /* bad luck today */
3530 }
3531 UNBLOCK_INPUT;
3532
3533 dirp->dd_fd = fd;
3534 dirp->dd_loc = dirp->dd_size = 0; /* refill needed */
3535
3536 return dirp;
3537 }
3538
3539 void
3540 closedir (dirp)
3541 register DIR *dirp; /* stream from opendir */
3542 {
3543 emacs_close (dirp->dd_fd);
3544 xfree ((char *) dirp);
3545 }
3546
3547
3548 #ifndef VMS
3549 #define DIRSIZ 14
3550 struct olddir
3551 {
3552 ino_t od_ino; /* inode */
3553 char od_name[DIRSIZ]; /* filename */
3554 };
3555 #endif /* not VMS */
3556
3557 struct direct dir_static; /* simulated directory contents */
3558
3559 /* ARGUSED */
3560 struct direct *
3561 readdir (dirp)
3562 register DIR *dirp; /* stream from opendir */
3563 {
3564 #ifndef VMS
3565 register struct olddir *dp; /* -> directory data */
3566 #else /* VMS */
3567 register struct dir$_name *dp; /* -> directory data */
3568 register struct dir$_version *dv; /* -> version data */
3569 #endif /* VMS */
3570
3571 for (; ;)
3572 {
3573 if (dirp->dd_loc >= dirp->dd_size)
3574 dirp->dd_loc = dirp->dd_size = 0;
3575
3576 if (dirp->dd_size == 0 /* refill buffer */
3577 && (dirp->dd_size = emacs_read (dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ)) <= 0)
3578 return 0;
3579
3580 #ifndef VMS
3581 dp = (struct olddir *) &dirp->dd_buf[dirp->dd_loc];
3582 dirp->dd_loc += sizeof (struct olddir);
3583
3584 if (dp->od_ino != 0) /* not deleted entry */
3585 {
3586 dir_static.d_ino = dp->od_ino;
3587 strncpy (dir_static.d_name, dp->od_name, DIRSIZ);
3588 dir_static.d_name[DIRSIZ] = '\0';
3589 dir_static.d_namlen = strlen (dir_static.d_name);
3590 dir_static.d_reclen = sizeof (struct direct)
3591 - MAXNAMLEN + 3
3592 + dir_static.d_namlen - dir_static.d_namlen % 4;
3593 return &dir_static; /* -> simulated structure */
3594 }
3595 #else /* VMS */
3596 dp = (struct dir$_name *) dirp->dd_buf;
3597 if (dirp->dd_loc == 0)
3598 dirp->dd_loc = (dp->dir$b_namecount&1) ? dp->dir$b_namecount + 1
3599 : dp->dir$b_namecount;
3600 dv = (struct dir$_version *)&dp->dir$t_name[dirp->dd_loc];
3601 dir_static.d_ino = dv->dir$w_fid_num;
3602 dir_static.d_namlen = dp->dir$b_namecount;
3603 dir_static.d_reclen = sizeof (struct direct)
3604 - MAXNAMLEN + 3
3605 + dir_static.d_namlen - dir_static.d_namlen % 4;
3606 strncpy (dir_static.d_name, dp->dir$t_name, dp->dir$b_namecount);
3607 dir_static.d_name[dir_static.d_namlen] = '\0';
3608 dirp->dd_loc = dirp->dd_size; /* only one record at a time */
3609 return &dir_static;
3610 #endif /* VMS */
3611 }
3612 }
3613
3614 #ifdef VMS
3615 /* readdirver is just like readdir except it returns all versions of a file
3616 as separate entries. */
3617
3618 /* ARGUSED */
3619 struct direct *
3620 readdirver (dirp)
3621 register DIR *dirp; /* stream from opendir */
3622 {
3623 register struct dir$_name *dp; /* -> directory data */
3624 register struct dir$_version *dv; /* -> version data */
3625
3626 if (dirp->dd_loc >= dirp->dd_size - sizeof (struct dir$_name))
3627 dirp->dd_loc = dirp->dd_size = 0;
3628
3629 if (dirp->dd_size == 0 /* refill buffer */
3630 && (dirp->dd_size = sys_read (dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ)) <= 0)
3631 return 0;
3632
3633 dp = (struct dir$_name *) dirp->dd_buf;
3634 if (dirp->dd_loc == 0)
3635 dirp->dd_loc = (dp->dir$b_namecount & 1) ? dp->dir$b_namecount + 1
3636 : dp->dir$b_namecount;
3637 dv = (struct dir$_version *) &dp->dir$t_name[dirp->dd_loc];
3638 strncpy (dir_static.d_name, dp->dir$t_name, dp->dir$b_namecount);
3639 sprintf (&dir_static.d_name[dp->dir$b_namecount], ";%d", dv->dir$w_version);
3640 dir_static.d_namlen = strlen (dir_static.d_name);
3641 dir_static.d_ino = dv->dir$w_fid_num;
3642 dir_static.d_reclen = sizeof (struct direct) - MAXNAMLEN + 3
3643 + dir_static.d_namlen - dir_static.d_namlen % 4;
3644 dirp->dd_loc = ((char *) (++dv) - dp->dir$t_name);
3645 return &dir_static;
3646 }
3647
3648 #endif /* VMS */
3649
3650 #endif /* NONSYSTEM_DIR_LIBRARY */
3651
3652 \f
3653 int
3654 set_file_times (filename, atime, mtime)
3655 const char *filename;
3656 EMACS_TIME atime, mtime;
3657 {
3658 #ifdef HAVE_UTIMES
3659 struct timeval tv[2];
3660 tv[0] = atime;
3661 tv[1] = mtime;
3662 return utimes (filename, tv);
3663 #else /* not HAVE_UTIMES */
3664 struct utimbuf utb;
3665 utb.actime = EMACS_SECS (atime);
3666 utb.modtime = EMACS_SECS (mtime);
3667 return utime (filename, &utb);
3668 #endif /* not HAVE_UTIMES */
3669 }
3670 \f
3671 /* mkdir and rmdir functions, for systems which don't have them. */
3672
3673 #ifndef HAVE_MKDIR
3674 /*
3675 * Written by Robert Rother, Mariah Corporation, August 1985.
3676 *
3677 * If you want it, it's yours. All I ask in return is that if you
3678 * figure out how to do this in a Bourne Shell script you send me
3679 * a copy.
3680 * sdcsvax!rmr or rmr@uscd
3681 *
3682 * Severely hacked over by John Gilmore to make a 4.2BSD compatible
3683 * subroutine. 11Mar86; hoptoad!gnu
3684 *
3685 * Modified by rmtodd@uokmax 6-28-87 -- when making an already existing dir,
3686 * subroutine didn't return EEXIST. It does now.
3687 */
3688
3689 /*
3690 * Make a directory.
3691 */
3692 #ifdef MKDIR_PROTOTYPE
3693 MKDIR_PROTOTYPE
3694 #else
3695 int
3696 mkdir (dpath, dmode)
3697 char *dpath;
3698 int dmode;
3699 #endif
3700 {
3701 int cpid, status, fd;
3702 struct stat statbuf;
3703
3704 if (stat (dpath, &statbuf) == 0)
3705 {
3706 errno = EEXIST; /* Stat worked, so it already exists */
3707 return -1;
3708 }
3709
3710 /* If stat fails for a reason other than non-existence, return error */
3711 if (errno != ENOENT)
3712 return -1;
3713
3714 synch_process_alive = 1;
3715 switch (cpid = fork ())
3716 {
3717
3718 case -1: /* Error in fork */
3719 return (-1); /* Errno is set already */
3720
3721 case 0: /* Child process */
3722 /*
3723 * Cheap hack to set mode of new directory. Since this
3724 * child process is going away anyway, we zap its umask.
3725 * FIXME, this won't suffice to set SUID, SGID, etc. on this
3726 * directory. Does anybody care?
3727 */
3728 status = umask (0); /* Get current umask */
3729 status = umask (status | (0777 & ~dmode)); /* Set for mkdir */
3730 fd = emacs_open ("/dev/null", O_RDWR, 0);
3731 if (fd >= 0)
3732 {
3733 dup2 (fd, 0);
3734 dup2 (fd, 1);
3735 dup2 (fd, 2);
3736 }
3737 execl ("/bin/mkdir", "mkdir", dpath, (char *) 0);
3738 _exit (-1); /* Can't exec /bin/mkdir */
3739
3740 default: /* Parent process */
3741 wait_for_termination (cpid);
3742 }
3743
3744 if (synch_process_death != 0 || synch_process_retcode != 0
3745 || synch_process_termsig != 0)
3746 {
3747 errno = EIO; /* We don't know why, but */
3748 return -1; /* /bin/mkdir failed */
3749 }
3750
3751 return 0;
3752 }
3753 #endif /* not HAVE_MKDIR */
3754
3755 #ifndef HAVE_RMDIR
3756 int
3757 rmdir (dpath)
3758 char *dpath;
3759 {
3760 int cpid, status, fd;
3761 struct stat statbuf;
3762
3763 if (stat (dpath, &statbuf) != 0)
3764 {
3765 /* Stat just set errno. We don't have to */
3766 return -1;
3767 }
3768
3769 synch_process_alive = 1;
3770 switch (cpid = fork ())
3771 {
3772
3773 case -1: /* Error in fork */
3774 return (-1); /* Errno is set already */
3775
3776 case 0: /* Child process */
3777 fd = emacs_open ("/dev/null", O_RDWR, 0);
3778 if (fd >= 0)
3779 {
3780 dup2 (fd, 0);
3781 dup2 (fd, 1);
3782 dup2 (fd, 2);
3783 }
3784 execl ("/bin/rmdir", "rmdir", dpath, (char *) 0);
3785 _exit (-1); /* Can't exec /bin/rmdir */
3786
3787 default: /* Parent process */
3788 wait_for_termination (cpid);
3789 }
3790
3791 if (synch_process_death != 0 || synch_process_retcode != 0
3792 || synch_process_termsig != 0)
3793 {
3794 errno = EIO; /* We don't know why, but */
3795 return -1; /* /bin/rmdir failed */
3796 }
3797
3798 return 0;
3799 }
3800 #endif /* !HAVE_RMDIR */
3801
3802
3803 \f
3804 /* Functions for VMS */
3805 #ifdef VMS
3806 #include "vms-pwd.h"
3807 #include <acldef.h>
3808 #include <chpdef.h>
3809 #include <jpidef.h>
3810
3811 /* Return as a string the VMS error string pertaining to STATUS.
3812 Reuses the same static buffer each time it is called. */
3813
3814 char *
3815 vmserrstr (status)
3816 int status; /* VMS status code */
3817 {
3818 int bufadr[2];
3819 short len;
3820 static char buf[257];
3821
3822 bufadr[0] = sizeof buf - 1;
3823 bufadr[1] = (int) buf;
3824 if (! (SYS$GETMSG (status, &len, bufadr, 0x1, 0) & 1))
3825 return "untranslatable VMS error status";
3826 buf[len] = '\0';
3827 return buf;
3828 }
3829
3830 #ifdef access
3831 #undef access
3832
3833 /* The following is necessary because 'access' emulation by VMS C (2.0) does
3834 * not work correctly. (It also doesn't work well in version 2.3.)
3835 */
3836
3837 #ifdef VMS4_4
3838
3839 #define DESCRIPTOR(name,string) struct dsc$descriptor_s name = \
3840 { strlen (string), DSC$K_DTYPE_T, DSC$K_CLASS_S, string }
3841
3842 typedef union {
3843 struct {
3844 unsigned short s_buflen;
3845 unsigned short s_code;
3846 char *s_bufadr;
3847 unsigned short *s_retlenadr;
3848 } s;
3849 int end;
3850 } item;
3851 #define buflen s.s_buflen
3852 #define code s.s_code
3853 #define bufadr s.s_bufadr
3854 #define retlenadr s.s_retlenadr
3855
3856 #define R_OK 4 /* test for read permission */
3857 #define W_OK 2 /* test for write permission */
3858 #define X_OK 1 /* test for execute (search) permission */
3859 #define F_OK 0 /* test for presence of file */
3860
3861 int
3862 sys_access (path, mode)
3863 char *path;
3864 int mode;
3865 {
3866 static char *user = NULL;
3867 char dir_fn[512];
3868
3869 /* translate possible directory spec into .DIR file name, so brain-dead
3870 * access can treat the directory like a file. */
3871 if (directory_file_name (path, dir_fn))
3872 path = dir_fn;
3873
3874 if (mode == F_OK)
3875 return access (path, mode);
3876 if (user == NULL && (user = (char *) getenv ("USER")) == NULL)
3877 return -1;
3878 {
3879 int stat;
3880 int flags;
3881 int acces;
3882 unsigned short int dummy;
3883 item itemlst[3];
3884 static int constant = ACL$C_FILE;
3885 DESCRIPTOR (path_desc, path);
3886 DESCRIPTOR (user_desc, user);
3887
3888 flags = 0;
3889 acces = 0;
3890 if ((mode & X_OK) && ((stat = access (path, mode)) < 0 || mode == X_OK))
3891 return stat;
3892 if (mode & R_OK)
3893 acces |= CHP$M_READ;
3894 if (mode & W_OK)
3895 acces |= CHP$M_WRITE;
3896 itemlst[0].buflen = sizeof (int);
3897 itemlst[0].code = CHP$_FLAGS;
3898 itemlst[0].bufadr = (char *) &flags;
3899 itemlst[0].retlenadr = &dummy;
3900 itemlst[1].buflen = sizeof (int);
3901 itemlst[1].code = CHP$_ACCESS;
3902 itemlst[1].bufadr = (char *) &acces;
3903 itemlst[1].retlenadr = &dummy;
3904 itemlst[2].end = CHP$_END;
3905 stat = SYS$CHECK_ACCESS (&constant, &path_desc, &user_desc, itemlst);
3906 return stat == SS$_NORMAL ? 0 : -1;
3907 }
3908 }
3909
3910 #else /* not VMS4_4 */
3911
3912 #include <prvdef.h>
3913 #define ACE$M_WRITE 2
3914 #define ACE$C_KEYID 1
3915
3916 static unsigned short memid, grpid;
3917 static unsigned int uic;
3918
3919 /* Called from init_sys_modes, so it happens not very often
3920 but at least each time Emacs is loaded. */
3921 void
3922 sys_access_reinit ()
3923 {
3924 uic = 0;
3925 }
3926
3927 int
3928 sys_access (filename, type)
3929 char * filename;
3930 int type;
3931 {
3932 struct FAB fab;
3933 struct XABPRO xab;
3934 int status, size, i, typecode, acl_controlled;
3935 unsigned int *aclptr, *aclend, aclbuf[60];
3936 union prvdef prvmask;
3937
3938 /* Get UIC and GRP values for protection checking. */
3939 if (uic == 0)
3940 {
3941 status = LIB$GETJPI (&JPI$_UIC, 0, 0, &uic, 0, 0);
3942 if (! (status & 1))
3943 return -1;
3944 memid = uic & 0xFFFF;
3945 grpid = uic >> 16;
3946 }
3947
3948 if (type != 2) /* not checking write access */
3949 return access (filename, type);
3950
3951 /* Check write protection. */
3952
3953 #define CHECKPRIV(bit) (prvmask.bit)
3954 #define WRITABLE(field) (! ((xab.xab$w_pro >> field) & XAB$M_NOWRITE))
3955
3956 /* Find privilege bits */
3957 status = SYS$SETPRV (0, 0, 0, prvmask);
3958 if (! (status & 1))
3959 error ("Unable to find privileges: %s", vmserrstr (status));
3960 if (CHECKPRIV (PRV$V_BYPASS))
3961 return 0; /* BYPASS enabled */
3962 fab = cc$rms_fab;
3963 fab.fab$b_fac = FAB$M_GET;
3964 fab.fab$l_fna = filename;
3965 fab.fab$b_fns = strlen (filename);
3966 fab.fab$l_xab = &xab;
3967 xab = cc$rms_xabpro;
3968 xab.xab$l_aclbuf = aclbuf;
3969 xab.xab$w_aclsiz = sizeof (aclbuf);
3970 status = SYS$OPEN (&fab, 0, 0);
3971 if (! (status & 1))
3972 return -1;
3973 SYS$CLOSE (&fab, 0, 0);
3974 /* Check system access */
3975 if (CHECKPRIV (PRV$V_SYSPRV) && WRITABLE (XAB$V_SYS))
3976 return 0;
3977 /* Check ACL entries, if any */
3978 acl_controlled = 0;
3979 if (xab.xab$w_acllen > 0)
3980 {
3981 aclptr = aclbuf;
3982 aclend = &aclbuf[xab.xab$w_acllen / 4];
3983 while (*aclptr && aclptr < aclend)
3984 {
3985 size = (*aclptr & 0xff) / 4;
3986 typecode = (*aclptr >> 8) & 0xff;
3987 if (typecode == ACE$C_KEYID)
3988 for (i = size - 1; i > 1; i--)
3989 if (aclptr[i] == uic)
3990 {
3991 acl_controlled = 1;
3992 if (aclptr[1] & ACE$M_WRITE)
3993 return 0; /* Write access through ACL */
3994 }
3995 aclptr = &aclptr[size];
3996 }
3997 if (acl_controlled) /* ACL specified, prohibits write access */
3998 return -1;
3999 }
4000 /* No ACL entries specified, check normal protection */
4001 if (WRITABLE (XAB$V_WLD)) /* World writable */
4002 return 0;
4003 if (WRITABLE (XAB$V_GRP) &&
4004 (unsigned short) (xab.xab$l_uic >> 16) == grpid)
4005 return 0; /* Group writable */
4006 if (WRITABLE (XAB$V_OWN) &&
4007 (xab.xab$l_uic & 0xFFFF) == memid)
4008 return 0; /* Owner writable */
4009
4010 return -1; /* Not writable */
4011 }
4012 #endif /* not VMS4_4 */
4013 #endif /* access */
4014
4015 static char vtbuf[NAM$C_MAXRSS+1];
4016
4017 /* translate a vms file spec to a unix path */
4018 char *
4019 sys_translate_vms (vfile)
4020 char * vfile;
4021 {
4022 char * p;
4023 char * targ;
4024
4025 if (!vfile)
4026 return 0;
4027
4028 targ = vtbuf;
4029
4030 /* leading device or logical name is a root directory */
4031 if (p = strchr (vfile, ':'))
4032 {
4033 *targ++ = '/';
4034 while (vfile < p)
4035 *targ++ = *vfile++;
4036 vfile++;
4037 *targ++ = '/';
4038 }
4039 p = vfile;
4040 if (*p == '[' || *p == '<')
4041 {
4042 while (*++vfile != *p + 2)
4043 switch (*vfile)
4044 {
4045 case '.':
4046 if (vfile[-1] == *p)
4047 *targ++ = '.';
4048 *targ++ = '/';
4049 break;
4050
4051 case '-':
4052 *targ++ = '.';
4053 *targ++ = '.';
4054 break;
4055
4056 default:
4057 *targ++ = *vfile;
4058 break;
4059 }
4060 vfile++;
4061 *targ++ = '/';
4062 }
4063 while (*vfile)
4064 *targ++ = *vfile++;
4065
4066 return vtbuf;
4067 }
4068
4069 static char utbuf[NAM$C_MAXRSS+1];
4070
4071 /* translate a unix path to a VMS file spec */
4072 char *
4073 sys_translate_unix (ufile)
4074 char * ufile;
4075 {
4076 int slash_seen = 0;
4077 char *p;
4078 char * targ;
4079
4080 if (!ufile)
4081 return 0;
4082
4083 targ = utbuf;
4084
4085 if (*ufile == '/')
4086 {
4087 ufile++;
4088 }
4089
4090 while (*ufile)
4091 {
4092 switch (*ufile)
4093 {
4094 case '/':
4095 if (slash_seen)
4096 if (index (&ufile[1], '/'))
4097 *targ++ = '.';
4098 else
4099 *targ++ = ']';
4100 else
4101 {
4102 *targ++ = ':';
4103 if (index (&ufile[1], '/'))
4104 *targ++ = '[';
4105 slash_seen = 1;
4106 }
4107 break;
4108
4109 case '.':
4110 if (strncmp (ufile, "./", 2) == 0)
4111 {
4112 if (!slash_seen)
4113 {
4114 *targ++ = '[';
4115 slash_seen = 1;
4116 }
4117 ufile++; /* skip the dot */
4118 if (index (&ufile[1], '/'))
4119 *targ++ = '.';
4120 else
4121 *targ++ = ']';
4122 }
4123 else if (strncmp (ufile, "../", 3) == 0)
4124 {
4125 if (!slash_seen)
4126 {
4127 *targ++ = '[';
4128 slash_seen = 1;
4129 }
4130 *targ++ = '-';
4131 ufile += 2; /* skip the dots */
4132 if (index (&ufile[1], '/'))
4133 *targ++ = '.';
4134 else
4135 *targ++ = ']';
4136 }
4137 else
4138 *targ++ = *ufile;
4139 break;
4140
4141 default:
4142 *targ++ = *ufile;
4143 break;
4144 }
4145 ufile++;
4146 }
4147 *targ = '\0';
4148
4149 return utbuf;
4150 }
4151
4152 char *
4153 getwd (pathname)
4154 char *pathname;
4155 {
4156 char *ptr, *val;
4157 extern char *getcwd ();
4158
4159 #define MAXPATHLEN 1024
4160
4161 ptr = xmalloc (MAXPATHLEN);
4162 val = getcwd (ptr, MAXPATHLEN);
4163 if (val == 0)
4164 {
4165 xfree (ptr);
4166 return val;
4167 }
4168 strcpy (pathname, ptr);
4169 xfree (ptr);
4170
4171 return pathname;
4172 }
4173
4174 int
4175 getppid ()
4176 {
4177 long item_code = JPI$_OWNER;
4178 unsigned long parent_id;
4179 int status;
4180
4181 if (((status = LIB$GETJPI (&item_code, 0, 0, &parent_id)) & 1) == 0)
4182 {
4183 errno = EVMSERR;
4184 vaxc$errno = status;
4185 return -1;
4186 }
4187 return parent_id;
4188 }
4189
4190 #undef getuid
4191 unsigned
4192 sys_getuid ()
4193 {
4194 return (getgid () << 16) | getuid ();
4195 }
4196
4197 #undef read
4198 int
4199 sys_read (fildes, buf, nbyte)
4200 int fildes;
4201 char *buf;
4202 unsigned int nbyte;
4203 {
4204 return read (fildes, buf, (nbyte < MAXIOSIZE ? nbyte : MAXIOSIZE));
4205 }
4206
4207 #if 0
4208 int
4209 sys_write (fildes, buf, nbyte)
4210 int fildes;
4211 char *buf;
4212 unsigned int nbyte;
4213 {
4214 register int nwrote, rtnval = 0;
4215
4216 while (nbyte > MAXIOSIZE && (nwrote = write (fildes, buf, MAXIOSIZE)) > 0) {
4217 nbyte -= nwrote;
4218 buf += nwrote;
4219 rtnval += nwrote;
4220 }
4221 if (nwrote < 0)
4222 return rtnval ? rtnval : -1;
4223 if ((nwrote = write (fildes, buf, nbyte)) < 0)
4224 return rtnval ? rtnval : -1;
4225 return (rtnval + nwrote);
4226 }
4227 #endif /* 0 */
4228
4229 /*
4230 * VAX/VMS VAX C RTL really loses. It insists that records
4231 * end with a newline (carriage return) character, and if they
4232 * don't it adds one (nice of it isn't it!)
4233 *
4234 * Thus we do this stupidity below.
4235 */
4236
4237 #undef write
4238 int
4239 sys_write (fildes, buf, nbytes)
4240 int fildes;
4241 char *buf;
4242 unsigned int nbytes;
4243 {
4244 register char *p;
4245 register char *e;
4246 int sum = 0;
4247 struct stat st;
4248
4249 fstat (fildes, &st);
4250 p = buf;
4251 while (nbytes > 0)
4252 {
4253 int len, retval;
4254
4255 /* Handle fixed-length files with carriage control. */
4256 if (st.st_fab_rfm == FAB$C_FIX
4257 && ((st.st_fab_rat & (FAB$M_FTN | FAB$M_CR)) != 0))
4258 {
4259 len = st.st_fab_mrs;
4260 retval = write (fildes, p, min (len, nbytes));
4261 if (retval != len)
4262 return -1;
4263 retval++; /* This skips the implied carriage control */
4264 }
4265 else
4266 {
4267 e = p + min (MAXIOSIZE, nbytes) - 1;
4268 while (*e != '\n' && e > p) e--;
4269 if (p == e) /* Ok.. so here we add a newline... sigh. */
4270 e = p + min (MAXIOSIZE, nbytes) - 1;
4271 len = e + 1 - p;
4272 retval = write (fildes, p, len);
4273 if (retval != len)
4274 return -1;
4275 }
4276 p += retval;
4277 sum += retval;
4278 nbytes -= retval;
4279 }
4280 return sum;
4281 }
4282
4283 /* Create file NEW copying its attributes from file OLD. If
4284 OLD is 0 or does not exist, create based on the value of
4285 vms_stmlf_recfm. */
4286
4287 /* Protection value the file should ultimately have.
4288 Set by create_copy_attrs, and use by rename_sansversions. */
4289 static unsigned short int fab_final_pro;
4290
4291 int
4292 creat_copy_attrs (old, new)
4293 char *old, *new;
4294 {
4295 struct FAB fab = cc$rms_fab;
4296 struct XABPRO xabpro;
4297 char aclbuf[256]; /* Choice of size is arbitrary. See below. */
4298 extern int vms_stmlf_recfm;
4299
4300 if (old)
4301 {
4302 fab.fab$b_fac = FAB$M_GET;
4303 fab.fab$l_fna = old;
4304 fab.fab$b_fns = strlen (old);
4305 fab.fab$l_xab = (char *) &xabpro;
4306 xabpro = cc$rms_xabpro;
4307 xabpro.xab$l_aclbuf = aclbuf;
4308 xabpro.xab$w_aclsiz = sizeof aclbuf;
4309 /* Call $OPEN to fill in the fab & xabpro fields. */
4310 if (SYS$OPEN (&fab, 0, 0) & 1)
4311 {
4312 SYS$CLOSE (&fab, 0, 0);
4313 fab.fab$l_alq = 0; /* zero the allocation quantity */
4314 if (xabpro.xab$w_acllen > 0)
4315 {
4316 if (xabpro.xab$w_acllen > sizeof aclbuf)
4317 /* If the acl buffer was too short, redo open with longer one.
4318 Wouldn't need to do this if there were some system imposed
4319 limit on the size of an ACL, but I can't find any such. */
4320 {
4321 xabpro.xab$l_aclbuf = (char *) alloca (xabpro.xab$w_acllen);
4322 xabpro.xab$w_aclsiz = xabpro.xab$w_acllen;
4323 if (SYS$OPEN (&fab, 0, 0) & 1)
4324 SYS$CLOSE (&fab, 0, 0);
4325 else
4326 old = 0;
4327 }
4328 }
4329 else
4330 xabpro.xab$l_aclbuf = 0;
4331 }
4332 else
4333 old = 0;
4334 }
4335 fab.fab$l_fna = new;
4336 fab.fab$b_fns = strlen (new);
4337 if (!old)
4338 {
4339 fab.fab$l_xab = 0;
4340 fab.fab$b_rfm = vms_stmlf_recfm ? FAB$C_STMLF : FAB$C_VAR;
4341 fab.fab$b_rat = FAB$M_CR;
4342 }
4343
4344 /* Set the file protections such that we will be able to manipulate
4345 this file. Once we are done writing and renaming it, we will set
4346 the protections back. */
4347 if (old)
4348 fab_final_pro = xabpro.xab$w_pro;
4349 else
4350 SYS$SETDFPROT (0, &fab_final_pro);
4351 xabpro.xab$w_pro &= 0xff0f; /* set O:rewd for now. This is set back later. */
4352
4353 /* Create the new file with either default attrs or attrs copied
4354 from old file. */
4355 if (!(SYS$CREATE (&fab, 0, 0) & 1))
4356 return -1;
4357 SYS$CLOSE (&fab, 0, 0);
4358 /* As this is a "replacement" for creat, return a file descriptor
4359 opened for writing. */
4360 return open (new, O_WRONLY);
4361 }
4362
4363 #ifdef creat
4364 #undef creat
4365 #include <varargs.h>
4366 #ifdef __GNUC__
4367 #ifndef va_count
4368 #define va_count(X) ((X) = *(((int *) &(va_alist)) - 1))
4369 #endif
4370 #endif
4371
4372 int
4373 sys_creat (va_alist)
4374 va_dcl
4375 {
4376 va_list list_incrementer;
4377 char *name;
4378 int mode;
4379 int rfd; /* related file descriptor */
4380 int fd; /* Our new file descriptor */
4381 int count;
4382 struct stat st_buf;
4383 char rfm[12];
4384 char rat[15];
4385 char mrs[13];
4386 char fsz[13];
4387 extern int vms_stmlf_recfm;
4388
4389 va_count (count);
4390 va_start (list_incrementer);
4391 name = va_arg (list_incrementer, char *);
4392 mode = va_arg (list_incrementer, int);
4393 if (count > 2)
4394 rfd = va_arg (list_incrementer, int);
4395 va_end (list_incrementer);
4396 if (count > 2)
4397 {
4398 /* Use information from the related file descriptor to set record
4399 format of the newly created file. */
4400 fstat (rfd, &st_buf);
4401 switch (st_buf.st_fab_rfm)
4402 {
4403 case FAB$C_FIX:
4404 strcpy (rfm, "rfm = fix");
4405 sprintf (mrs, "mrs = %d", st_buf.st_fab_mrs);
4406 strcpy (rat, "rat = ");
4407 if (st_buf.st_fab_rat & FAB$M_CR)
4408 strcat (rat, "cr");
4409 else if (st_buf.st_fab_rat & FAB$M_FTN)
4410 strcat (rat, "ftn");
4411 else if (st_buf.st_fab_rat & FAB$M_PRN)
4412 strcat (rat, "prn");
4413 if (st_buf.st_fab_rat & FAB$M_BLK)
4414 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4415 strcat (rat, ", blk");
4416 else
4417 strcat (rat, "blk");
4418 return creat (name, 0, rfm, rat, mrs);
4419
4420 case FAB$C_VFC:
4421 strcpy (rfm, "rfm = vfc");
4422 sprintf (fsz, "fsz = %d", st_buf.st_fab_fsz);
4423 strcpy (rat, "rat = ");
4424 if (st_buf.st_fab_rat & FAB$M_CR)
4425 strcat (rat, "cr");
4426 else if (st_buf.st_fab_rat & FAB$M_FTN)
4427 strcat (rat, "ftn");
4428 else if (st_buf.st_fab_rat & FAB$M_PRN)
4429 strcat (rat, "prn");
4430 if (st_buf.st_fab_rat & FAB$M_BLK)
4431 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4432 strcat (rat, ", blk");
4433 else
4434 strcat (rat, "blk");
4435 return creat (name, 0, rfm, rat, fsz);
4436
4437 case FAB$C_STM:
4438 strcpy (rfm, "rfm = stm");
4439 break;
4440
4441 case FAB$C_STMCR:
4442 strcpy (rfm, "rfm = stmcr");
4443 break;
4444
4445 case FAB$C_STMLF:
4446 strcpy (rfm, "rfm = stmlf");
4447 break;
4448
4449 case FAB$C_UDF:
4450 strcpy (rfm, "rfm = udf");
4451 break;
4452
4453 case FAB$C_VAR:
4454 strcpy (rfm, "rfm = var");
4455 break;
4456 }
4457 strcpy (rat, "rat = ");
4458 if (st_buf.st_fab_rat & FAB$M_CR)
4459 strcat (rat, "cr");
4460 else if (st_buf.st_fab_rat & FAB$M_FTN)
4461 strcat (rat, "ftn");
4462 else if (st_buf.st_fab_rat & FAB$M_PRN)
4463 strcat (rat, "prn");
4464 if (st_buf.st_fab_rat & FAB$M_BLK)
4465 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4466 strcat (rat, ", blk");
4467 else
4468 strcat (rat, "blk");
4469 }
4470 else
4471 {
4472 strcpy (rfm, vms_stmlf_recfm ? "rfm = stmlf" : "rfm=var");
4473 strcpy (rat, "rat=cr");
4474 }
4475 /* Until the VAX C RTL fixes the many bugs with modes, always use
4476 mode 0 to get the user's default protection. */
4477 fd = creat (name, 0, rfm, rat);
4478 if (fd < 0 && errno == EEXIST)
4479 {
4480 if (unlink (name) < 0)
4481 report_file_error ("delete", build_string (name));
4482 fd = creat (name, 0, rfm, rat);
4483 }
4484 return fd;
4485 }
4486 #endif /* creat */
4487
4488 /* fwrite to stdout is S L O W. Speed it up by using fputc...*/
4489 int
4490 sys_fwrite (ptr, size, num, fp)
4491 register char * ptr;
4492 FILE * fp;
4493 {
4494 register int tot = num * size;
4495
4496 while (tot--)
4497 fputc (*ptr++, fp);
4498 return num;
4499 }
4500
4501 /*
4502 * The VMS C library routine creat actually creates a new version of an
4503 * existing file rather than truncating the old version. There are times
4504 * when this is not the desired behavior, for instance, when writing an
4505 * auto save file (you only want one version), or when you don't have
4506 * write permission in the directory containing the file (but the file
4507 * itself is writable). Hence this routine, which is equivalent to
4508 * "close (creat (fn, 0));" on Unix if fn already exists.
4509 */
4510 int
4511 vms_truncate (fn)
4512 char *fn;
4513 {
4514 struct FAB xfab = cc$rms_fab;
4515 struct RAB xrab = cc$rms_rab;
4516 int status;
4517
4518 xfab.fab$l_fop = FAB$M_TEF; /* free allocated but unused blocks on close */
4519 xfab.fab$b_fac = FAB$M_TRN | FAB$M_GET; /* allow truncate and get access */
4520 xfab.fab$b_shr = FAB$M_NIL; /* allow no sharing - file must be locked */
4521 xfab.fab$l_fna = fn;
4522 xfab.fab$b_fns = strlen (fn);
4523 xfab.fab$l_dna = ";0"; /* default to latest version of the file */
4524 xfab.fab$b_dns = 2;
4525 xrab.rab$l_fab = &xfab;
4526
4527 /* This gibberish opens the file, positions to the first record, and
4528 deletes all records from there until the end of file. */
4529 if ((SYS$OPEN (&xfab) & 01) == 01)
4530 {
4531 if ((SYS$CONNECT (&xrab) & 01) == 01 &&
4532 (SYS$FIND (&xrab) & 01) == 01 &&
4533 (SYS$TRUNCATE (&xrab) & 01) == 01)
4534 status = 0;
4535 else
4536 status = -1;
4537 }
4538 else
4539 status = -1;
4540 SYS$CLOSE (&xfab);
4541 return status;
4542 }
4543
4544 /* Define this symbol to actually read SYSUAF.DAT. This requires either
4545 SYSPRV or a readable SYSUAF.DAT. */
4546
4547 #ifdef READ_SYSUAF
4548 /*
4549 * getuaf.c
4550 *
4551 * Routine to read the VMS User Authorization File and return
4552 * a specific user's record.
4553 */
4554
4555 static struct UAF retuaf;
4556
4557 struct UAF *
4558 get_uaf_name (uname)
4559 char * uname;
4560 {
4561 register status;
4562 struct FAB uaf_fab;
4563 struct RAB uaf_rab;
4564
4565 uaf_fab = cc$rms_fab;
4566 uaf_rab = cc$rms_rab;
4567 /* initialize fab fields */
4568 uaf_fab.fab$l_fna = "SYS$SYSTEM:SYSUAF.DAT";
4569 uaf_fab.fab$b_fns = 21;
4570 uaf_fab.fab$b_fac = FAB$M_GET;
4571 uaf_fab.fab$b_org = FAB$C_IDX;
4572 uaf_fab.fab$b_shr = FAB$M_GET|FAB$M_PUT|FAB$M_UPD|FAB$M_DEL;
4573 /* initialize rab fields */
4574 uaf_rab.rab$l_fab = &uaf_fab;
4575 /* open the User Authorization File */
4576 status = SYS$OPEN (&uaf_fab);
4577 if (!(status&1))
4578 {
4579 errno = EVMSERR;
4580 vaxc$errno = status;
4581 return 0;
4582 }
4583 status = SYS$CONNECT (&uaf_rab);
4584 if (!(status&1))
4585 {
4586 errno = EVMSERR;
4587 vaxc$errno = status;
4588 return 0;
4589 }
4590 /* read the requested record - index is in uname */
4591 uaf_rab.rab$l_kbf = uname;
4592 uaf_rab.rab$b_ksz = strlen (uname);
4593 uaf_rab.rab$b_rac = RAB$C_KEY;
4594 uaf_rab.rab$l_ubf = (char *)&retuaf;
4595 uaf_rab.rab$w_usz = sizeof retuaf;
4596 status = SYS$GET (&uaf_rab);
4597 if (!(status&1))
4598 {
4599 errno = EVMSERR;
4600 vaxc$errno = status;
4601 return 0;
4602 }
4603 /* close the User Authorization File */
4604 status = SYS$DISCONNECT (&uaf_rab);
4605 if (!(status&1))
4606 {
4607 errno = EVMSERR;
4608 vaxc$errno = status;
4609 return 0;
4610 }
4611 status = SYS$CLOSE (&uaf_fab);
4612 if (!(status&1))
4613 {
4614 errno = EVMSERR;
4615 vaxc$errno = status;
4616 return 0;
4617 }
4618 return &retuaf;
4619 }
4620
4621 struct UAF *
4622 get_uaf_uic (uic)
4623 unsigned long uic;
4624 {
4625 register status;
4626 struct FAB uaf_fab;
4627 struct RAB uaf_rab;
4628
4629 uaf_fab = cc$rms_fab;
4630 uaf_rab = cc$rms_rab;
4631 /* initialize fab fields */
4632 uaf_fab.fab$l_fna = "SYS$SYSTEM:SYSUAF.DAT";
4633 uaf_fab.fab$b_fns = 21;
4634 uaf_fab.fab$b_fac = FAB$M_GET;
4635 uaf_fab.fab$b_org = FAB$C_IDX;
4636 uaf_fab.fab$b_shr = FAB$M_GET|FAB$M_PUT|FAB$M_UPD|FAB$M_DEL;
4637 /* initialize rab fields */
4638 uaf_rab.rab$l_fab = &uaf_fab;
4639 /* open the User Authorization File */
4640 status = SYS$OPEN (&uaf_fab);
4641 if (!(status&1))
4642 {
4643 errno = EVMSERR;
4644 vaxc$errno = status;
4645 return 0;
4646 }
4647 status = SYS$CONNECT (&uaf_rab);
4648 if (!(status&1))
4649 {
4650 errno = EVMSERR;
4651 vaxc$errno = status;
4652 return 0;
4653 }
4654 /* read the requested record - index is in uic */
4655 uaf_rab.rab$b_krf = 1; /* 1st alternate key */
4656 uaf_rab.rab$l_kbf = (char *) &uic;
4657 uaf_rab.rab$b_ksz = sizeof uic;
4658 uaf_rab.rab$b_rac = RAB$C_KEY;
4659 uaf_rab.rab$l_ubf = (char *)&retuaf;
4660 uaf_rab.rab$w_usz = sizeof retuaf;
4661 status = SYS$GET (&uaf_rab);
4662 if (!(status&1))
4663 {
4664 errno = EVMSERR;
4665 vaxc$errno = status;
4666 return 0;
4667 }
4668 /* close the User Authorization File */
4669 status = SYS$DISCONNECT (&uaf_rab);
4670 if (!(status&1))
4671 {
4672 errno = EVMSERR;
4673 vaxc$errno = status;
4674 return 0;
4675 }
4676 status = SYS$CLOSE (&uaf_fab);
4677 if (!(status&1))
4678 {
4679 errno = EVMSERR;
4680 vaxc$errno = status;
4681 return 0;
4682 }
4683 return &retuaf;
4684 }
4685
4686 static struct passwd retpw;
4687
4688 struct passwd *
4689 cnv_uaf_pw (up)
4690 struct UAF * up;
4691 {
4692 char * ptr;
4693
4694 /* copy these out first because if the username is 32 chars, the next
4695 section will overwrite the first byte of the UIC */
4696 retpw.pw_uid = up->uaf$w_mem;
4697 retpw.pw_gid = up->uaf$w_grp;
4698
4699 /* I suppose this is not the best style, to possibly overwrite one
4700 byte beyond the end of the field, but what the heck... */
4701 ptr = &up->uaf$t_username[UAF$S_USERNAME];
4702 while (ptr[-1] == ' ')
4703 ptr--;
4704 *ptr = '\0';
4705 strcpy (retpw.pw_name, up->uaf$t_username);
4706
4707 /* the rest of these are counted ascii strings */
4708 strncpy (retpw.pw_gecos, &up->uaf$t_owner[1], up->uaf$t_owner[0]);
4709 retpw.pw_gecos[up->uaf$t_owner[0]] = '\0';
4710 strncpy (retpw.pw_dir, &up->uaf$t_defdev[1], up->uaf$t_defdev[0]);
4711 retpw.pw_dir[up->uaf$t_defdev[0]] = '\0';
4712 strncat (retpw.pw_dir, &up->uaf$t_defdir[1], up->uaf$t_defdir[0]);
4713 retpw.pw_dir[up->uaf$t_defdev[0] + up->uaf$t_defdir[0]] = '\0';
4714 strncpy (retpw.pw_shell, &up->uaf$t_defcli[1], up->uaf$t_defcli[0]);
4715 retpw.pw_shell[up->uaf$t_defcli[0]] = '\0';
4716
4717 return &retpw;
4718 }
4719 #else /* not READ_SYSUAF */
4720 static struct passwd retpw;
4721 #endif /* not READ_SYSUAF */
4722
4723 struct passwd *
4724 getpwnam (name)
4725 char * name;
4726 {
4727 #ifdef READ_SYSUAF
4728 struct UAF *up;
4729 #else
4730 char * user;
4731 char * dir;
4732 unsigned char * full;
4733 #endif /* READ_SYSUAF */
4734 char *ptr = name;
4735
4736 while (*ptr)
4737 {
4738 if ('a' <= *ptr && *ptr <= 'z')
4739 *ptr -= 040;
4740 ptr++;
4741 }
4742 #ifdef READ_SYSUAF
4743 if (!(up = get_uaf_name (name)))
4744 return 0;
4745 return cnv_uaf_pw (up);
4746 #else
4747 if (strcmp (name, getenv ("USER")) == 0)
4748 {
4749 retpw.pw_uid = getuid ();
4750 retpw.pw_gid = getgid ();
4751 strcpy (retpw.pw_name, name);
4752 if (full = egetenv ("FULLNAME"))
4753 strcpy (retpw.pw_gecos, full);
4754 else
4755 *retpw.pw_gecos = '\0';
4756 strcpy (retpw.pw_dir, egetenv ("HOME"));
4757 *retpw.pw_shell = '\0';
4758 return &retpw;
4759 }
4760 else
4761 return 0;
4762 #endif /* not READ_SYSUAF */
4763 }
4764
4765 struct passwd *
4766 getpwuid (uid)
4767 unsigned long uid;
4768 {
4769 #ifdef READ_SYSUAF
4770 struct UAF * up;
4771
4772 if (!(up = get_uaf_uic (uid)))
4773 return 0;
4774 return cnv_uaf_pw (up);
4775 #else
4776 if (uid == sys_getuid ())
4777 return getpwnam (egetenv ("USER"));
4778 else
4779 return 0;
4780 #endif /* not READ_SYSUAF */
4781 }
4782
4783 /* return total address space available to the current process. This is
4784 the sum of the current p0 size, p1 size and free page table entries
4785 available. */
4786 int
4787 vlimit ()
4788 {
4789 int item_code;
4790 unsigned long free_pages;
4791 unsigned long frep0va;
4792 unsigned long frep1va;
4793 register status;
4794
4795 item_code = JPI$_FREPTECNT;
4796 if (((status = LIB$GETJPI (&item_code, 0, 0, &free_pages)) & 1) == 0)
4797 {
4798 errno = EVMSERR;
4799 vaxc$errno = status;
4800 return -1;
4801 }
4802 free_pages *= 512;
4803
4804 item_code = JPI$_FREP0VA;
4805 if (((status = LIB$GETJPI (&item_code, 0, 0, &frep0va)) & 1) == 0)
4806 {
4807 errno = EVMSERR;
4808 vaxc$errno = status;
4809 return -1;
4810 }
4811 item_code = JPI$_FREP1VA;
4812 if (((status = LIB$GETJPI (&item_code, 0, 0, &frep1va)) & 1) == 0)
4813 {
4814 errno = EVMSERR;
4815 vaxc$errno = status;
4816 return -1;
4817 }
4818
4819 return free_pages + frep0va + (0x7fffffff - frep1va);
4820 }
4821
4822 int
4823 define_logical_name (varname, string)
4824 char *varname;
4825 char *string;
4826 {
4827 struct dsc$descriptor_s strdsc =
4828 {strlen (string), DSC$K_DTYPE_T, DSC$K_CLASS_S, string};
4829 struct dsc$descriptor_s envdsc =
4830 {strlen (varname), DSC$K_DTYPE_T, DSC$K_CLASS_S, varname};
4831 struct dsc$descriptor_s lnmdsc =
4832 {7, DSC$K_DTYPE_T, DSC$K_CLASS_S, "LNM$JOB"};
4833
4834 return LIB$SET_LOGICAL (&envdsc, &strdsc, &lnmdsc, 0, 0);
4835 }
4836
4837 int
4838 delete_logical_name (varname)
4839 char *varname;
4840 {
4841 struct dsc$descriptor_s envdsc =
4842 {strlen (varname), DSC$K_DTYPE_T, DSC$K_CLASS_S, varname};
4843 struct dsc$descriptor_s lnmdsc =
4844 {7, DSC$K_DTYPE_T, DSC$K_CLASS_S, "LNM$JOB"};
4845
4846 return LIB$DELETE_LOGICAL (&envdsc, &lnmdsc);
4847 }
4848
4849 int
4850 ulimit ()
4851 {
4852 return 0;
4853 }
4854
4855 int
4856 setpgrp ()
4857 {
4858 return 0;
4859 }
4860
4861 int
4862 execvp ()
4863 {
4864 error ("execvp system call not implemented");
4865 return -1;
4866 }
4867
4868 int
4869 rename (from, to)
4870 char *from, *to;
4871 {
4872 int status;
4873 struct FAB from_fab = cc$rms_fab, to_fab = cc$rms_fab;
4874 struct NAM from_nam = cc$rms_nam, to_nam = cc$rms_nam;
4875 char from_esn[NAM$C_MAXRSS];
4876 char to_esn[NAM$C_MAXRSS];
4877
4878 from_fab.fab$l_fna = from;
4879 from_fab.fab$b_fns = strlen (from);
4880 from_fab.fab$l_nam = &from_nam;
4881 from_fab.fab$l_fop = FAB$M_NAM;
4882
4883 from_nam.nam$l_esa = from_esn;
4884 from_nam.nam$b_ess = sizeof from_esn;
4885
4886 to_fab.fab$l_fna = to;
4887 to_fab.fab$b_fns = strlen (to);
4888 to_fab.fab$l_nam = &to_nam;
4889 to_fab.fab$l_fop = FAB$M_NAM;
4890
4891 to_nam.nam$l_esa = to_esn;
4892 to_nam.nam$b_ess = sizeof to_esn;
4893
4894 status = SYS$RENAME (&from_fab, 0, 0, &to_fab);
4895
4896 if (status & 1)
4897 return 0;
4898 else
4899 {
4900 if (status == RMS$_DEV)
4901 errno = EXDEV;
4902 else
4903 errno = EVMSERR;
4904 vaxc$errno = status;
4905 return -1;
4906 }
4907 }
4908
4909 /* This function renames a file like `rename', but it strips
4910 the version number from the "to" filename, such that the "to" file is
4911 will always be a new version. It also sets the file protection once it is
4912 finished. The protection that we will use is stored in fab_final_pro,
4913 and was set when we did a creat_copy_attrs to create the file that we
4914 are renaming.
4915
4916 We could use the chmod function, but Eunichs uses 3 bits per user category
4917 to describe the protection, and VMS uses 4 (write and delete are separate
4918 bits). To maintain portability, the VMS implementation of `chmod' wires
4919 the W and D bits together. */
4920
4921
4922 static struct fibdef fib; /* We need this initialized to zero */
4923 char vms_file_written[NAM$C_MAXRSS];
4924
4925 int
4926 rename_sans_version (from,to)
4927 char *from, *to;
4928 {
4929 short int chan;
4930 int stat;
4931 short int iosb[4];
4932 int status;
4933 struct FAB to_fab = cc$rms_fab;
4934 struct NAM to_nam = cc$rms_nam;
4935 struct dsc$descriptor fib_d ={sizeof (fib),0,0,(char*) &fib};
4936 struct dsc$descriptor fib_attr[2]
4937 = {{sizeof (fab_final_pro),ATR$C_FPRO,0,(char*) &fab_final_pro},{0,0,0,0}};
4938 char to_esn[NAM$C_MAXRSS];
4939
4940 $DESCRIPTOR (disk,to_esn);
4941
4942 to_fab.fab$l_fna = to;
4943 to_fab.fab$b_fns = strlen (to);
4944 to_fab.fab$l_nam = &to_nam;
4945 to_fab.fab$l_fop = FAB$M_NAM;
4946
4947 to_nam.nam$l_esa = to_esn;
4948 to_nam.nam$b_ess = sizeof to_esn;
4949
4950 status = SYS$PARSE (&to_fab, 0, 0); /* figure out the full file name */
4951
4952 if (to_nam.nam$l_fnb && NAM$M_EXP_VER)
4953 *(to_nam.nam$l_ver) = '\0';
4954
4955 stat = rename (from, to_esn);
4956 if (stat < 0)
4957 return stat;
4958
4959 strcpy (vms_file_written, to_esn);
4960
4961 to_fab.fab$l_fna = vms_file_written; /* this points to the versionless name */
4962 to_fab.fab$b_fns = strlen (vms_file_written);
4963
4964 /* Now set the file protection to the correct value */
4965 SYS$OPEN (&to_fab, 0, 0); /* This fills in the nam$w_fid fields */
4966
4967 /* Copy these fields into the fib */
4968 fib.fib$r_fid_overlay.fib$w_fid[0] = to_nam.nam$w_fid[0];
4969 fib.fib$r_fid_overlay.fib$w_fid[1] = to_nam.nam$w_fid[1];
4970 fib.fib$r_fid_overlay.fib$w_fid[2] = to_nam.nam$w_fid[2];
4971
4972 SYS$CLOSE (&to_fab, 0, 0);
4973
4974 stat = SYS$ASSIGN (&disk, &chan, 0, 0); /* open a channel to the disk */
4975 if (!stat)
4976 LIB$SIGNAL (stat);
4977 stat = SYS$QIOW (0, chan, IO$_MODIFY, iosb, 0, 0, &fib_d,
4978 0, 0, 0, &fib_attr, 0);
4979 if (!stat)
4980 LIB$SIGNAL (stat);
4981 stat = SYS$DASSGN (chan);
4982 if (!stat)
4983 LIB$SIGNAL (stat);
4984 strcpy (vms_file_written, to_esn); /* We will write this to the terminal*/
4985 return 0;
4986 }
4987
4988 int
4989 link (file, new)
4990 char * file, * new;
4991 {
4992 register status;
4993 struct FAB fab;
4994 struct NAM nam;
4995 unsigned short fid[3];
4996 char esa[NAM$C_MAXRSS];
4997
4998 fab = cc$rms_fab;
4999 fab.fab$l_fop = FAB$M_OFP;
5000 fab.fab$l_fna = file;
5001 fab.fab$b_fns = strlen (file);
5002 fab.fab$l_nam = &nam;
5003
5004 nam = cc$rms_nam;
5005 nam.nam$l_esa = esa;
5006 nam.nam$b_ess = NAM$C_MAXRSS;
5007
5008 status = SYS$PARSE (&fab);
5009 if ((status & 1) == 0)
5010 {
5011 errno = EVMSERR;
5012 vaxc$errno = status;
5013 return -1;
5014 }
5015 status = SYS$SEARCH (&fab);
5016 if ((status & 1) == 0)
5017 {
5018 errno = EVMSERR;
5019 vaxc$errno = status;
5020 return -1;
5021 }
5022
5023 fid[0] = nam.nam$w_fid[0];
5024 fid[1] = nam.nam$w_fid[1];
5025 fid[2] = nam.nam$w_fid[2];
5026
5027 fab.fab$l_fna = new;
5028 fab.fab$b_fns = strlen (new);
5029
5030 status = SYS$PARSE (&fab);
5031 if ((status & 1) == 0)
5032 {
5033 errno = EVMSERR;
5034 vaxc$errno = status;
5035 return -1;
5036 }
5037
5038 nam.nam$w_fid[0] = fid[0];
5039 nam.nam$w_fid[1] = fid[1];
5040 nam.nam$w_fid[2] = fid[2];
5041
5042 nam.nam$l_esa = nam.nam$l_name;
5043 nam.nam$b_esl = nam.nam$b_name + nam.nam$b_type + nam.nam$b_ver;
5044
5045 status = SYS$ENTER (&fab);
5046 if ((status & 1) == 0)
5047 {
5048 errno = EVMSERR;
5049 vaxc$errno = status;
5050 return -1;
5051 }
5052
5053 return 0;
5054 }
5055
5056 void
5057 croak (badfunc)
5058 char *badfunc;
5059 {
5060 printf ("%s not yet implemented\r\n", badfunc);
5061 reset_sys_modes ();
5062 exit (1);
5063 }
5064
5065 long
5066 random ()
5067 {
5068 /* Arrange to return a range centered on zero. */
5069 return rand () - (1 << 30);
5070 }
5071
5072 void
5073 srandom (seed)
5074 {
5075 srand (seed);
5076 }
5077 #endif /* VMS */
5078 \f
5079 #ifdef AIXHFT
5080
5081 /* Called from init_sys_modes. */
5082 void
5083 hft_init ()
5084 {
5085 int junk;
5086
5087 /* If we're not on an HFT we shouldn't do any of this. We determine
5088 if we are on an HFT by trying to get an HFT error code. If this
5089 call fails, we're not on an HFT. */
5090 #ifdef IBMR2AIX
5091 if (ioctl (0, HFQERROR, &junk) < 0)
5092 return;
5093 #else /* not IBMR2AIX */
5094 if (ioctl (0, HFQEIO, 0) < 0)
5095 return;
5096 #endif /* not IBMR2AIX */
5097
5098 /* On AIX the default hft keyboard mapping uses backspace rather than delete
5099 as the rubout key's ASCII code. Here this is changed. The bug is that
5100 there's no way to determine the old mapping, so in reset_sys_modes
5101 we need to assume that the normal map had been present. Of course, this
5102 code also doesn't help if on a terminal emulator which doesn't understand
5103 HFT VTD's. */
5104 {
5105 struct hfbuf buf;
5106 struct hfkeymap keymap;
5107
5108 buf.hf_bufp = (char *)&keymap;
5109 buf.hf_buflen = sizeof (keymap);
5110 keymap.hf_nkeys = 2;
5111 keymap.hfkey[0].hf_kpos = 15;
5112 keymap.hfkey[0].hf_kstate = HFMAPCHAR | HFSHFNONE;
5113 #ifdef IBMR2AIX
5114 keymap.hfkey[0].hf_keyidh = '<';
5115 #else /* not IBMR2AIX */
5116 keymap.hfkey[0].hf_page = '<';
5117 #endif /* not IBMR2AIX */
5118 keymap.hfkey[0].hf_char = 127;
5119 keymap.hfkey[1].hf_kpos = 15;
5120 keymap.hfkey[1].hf_kstate = HFMAPCHAR | HFSHFSHFT;
5121 #ifdef IBMR2AIX
5122 keymap.hfkey[1].hf_keyidh = '<';
5123 #else /* not IBMR2AIX */
5124 keymap.hfkey[1].hf_page = '<';
5125 #endif /* not IBMR2AIX */
5126 keymap.hfkey[1].hf_char = 127;
5127 hftctl (0, HFSKBD, &buf);
5128 }
5129 /* The HFT system on AIX doesn't optimize for scrolling, so it's really ugly
5130 at times. */
5131 line_ins_del_ok = char_ins_del_ok = 0;
5132 }
5133
5134 /* Reset the rubout key to backspace. */
5135
5136 void
5137 hft_reset ()
5138 {
5139 struct hfbuf buf;
5140 struct hfkeymap keymap;
5141 int junk;
5142
5143 #ifdef IBMR2AIX
5144 if (ioctl (0, HFQERROR, &junk) < 0)
5145 return;
5146 #else /* not IBMR2AIX */
5147 if (ioctl (0, HFQEIO, 0) < 0)
5148 return;
5149 #endif /* not IBMR2AIX */
5150
5151 buf.hf_bufp = (char *)&keymap;
5152 buf.hf_buflen = sizeof (keymap);
5153 keymap.hf_nkeys = 2;
5154 keymap.hfkey[0].hf_kpos = 15;
5155 keymap.hfkey[0].hf_kstate = HFMAPCHAR | HFSHFNONE;
5156 #ifdef IBMR2AIX
5157 keymap.hfkey[0].hf_keyidh = '<';
5158 #else /* not IBMR2AIX */
5159 keymap.hfkey[0].hf_page = '<';
5160 #endif /* not IBMR2AIX */
5161 keymap.hfkey[0].hf_char = 8;
5162 keymap.hfkey[1].hf_kpos = 15;
5163 keymap.hfkey[1].hf_kstate = HFMAPCHAR | HFSHFSHFT;
5164 #ifdef IBMR2AIX
5165 keymap.hfkey[1].hf_keyidh = '<';
5166 #else /* not IBMR2AIX */
5167 keymap.hfkey[1].hf_page = '<';
5168 #endif /* not IBMR2AIX */
5169 keymap.hfkey[1].hf_char = 8;
5170 hftctl (0, HFSKBD, &buf);
5171 }
5172
5173 #endif /* AIXHFT */
5174
5175 #ifdef USE_DL_STUBS
5176
5177 /* These are included on Sunos 4.1 when we do not use shared libraries.
5178 X11 libraries may refer to these functions but (we hope) do not
5179 actually call them. */
5180
5181 void *
5182 dlopen ()
5183 {
5184 return 0;
5185 }
5186
5187 void *
5188 dlsym ()
5189 {
5190 return 0;
5191 }
5192
5193 int
5194 dlclose ()
5195 {
5196 return -1;
5197 }
5198
5199 #endif /* USE_DL_STUBS */
5200 \f
5201 #ifndef BSTRING
5202
5203 #ifndef bzero
5204
5205 void
5206 bzero (b, length)
5207 register char *b;
5208 register int length;
5209 {
5210 #ifdef VMS
5211 short zero = 0;
5212 long max_str = 65535;
5213
5214 while (length > max_str) {
5215 (void) LIB$MOVC5 (&zero, &zero, &zero, &max_str, b);
5216 length -= max_str;
5217 b += max_str;
5218 }
5219 max_str = length;
5220 (void) LIB$MOVC5 (&zero, &zero, &zero, &max_str, b);
5221 #else
5222 while (length-- > 0)
5223 *b++ = 0;
5224 #endif /* not VMS */
5225 }
5226
5227 #endif /* no bzero */
5228 #endif /* BSTRING */
5229
5230 #if (!defined (BSTRING) && !defined (bcopy)) || defined (NEED_BCOPY)
5231 #undef bcopy
5232
5233 /* Saying `void' requires a declaration, above, where bcopy is used
5234 and that declaration causes pain for systems where bcopy is a macro. */
5235 bcopy (b1, b2, length)
5236 register char *b1;
5237 register char *b2;
5238 register int length;
5239 {
5240 #ifdef VMS
5241 long max_str = 65535;
5242
5243 while (length > max_str) {
5244 (void) LIB$MOVC3 (&max_str, b1, b2);
5245 length -= max_str;
5246 b1 += max_str;
5247 b2 += max_str;
5248 }
5249 max_str = length;
5250 (void) LIB$MOVC3 (&length, b1, b2);
5251 #else
5252 while (length-- > 0)
5253 *b2++ = *b1++;
5254 #endif /* not VMS */
5255 }
5256 #endif /* (!defined (BSTRING) && !defined (bcopy)) || defined (NEED_BCOPY) */
5257
5258 #ifndef BSTRING
5259 #ifndef bcmp
5260 int
5261 bcmp (b1, b2, length) /* This could be a macro! */
5262 register char *b1;
5263 register char *b2;
5264 register int length;
5265 {
5266 #ifdef VMS
5267 struct dsc$descriptor_s src1 = {length, DSC$K_DTYPE_T, DSC$K_CLASS_S, b1};
5268 struct dsc$descriptor_s src2 = {length, DSC$K_DTYPE_T, DSC$K_CLASS_S, b2};
5269
5270 return STR$COMPARE (&src1, &src2);
5271 #else
5272 while (length-- > 0)
5273 if (*b1++ != *b2++)
5274 return 1;
5275
5276 return 0;
5277 #endif /* not VMS */
5278 }
5279 #endif /* no bcmp */
5280 #endif /* not BSTRING */
5281 \f
5282 #ifndef HAVE_STRSIGNAL
5283 char *
5284 strsignal (code)
5285 int code;
5286 {
5287 char *signame = 0;
5288
5289 if (0 <= code && code < NSIG)
5290 {
5291 #ifdef VMS
5292 signame = sys_errlist[code];
5293 #else
5294 /* Cast to suppress warning if the table has const char *. */
5295 signame = (char *) sys_siglist[code];
5296 #endif
5297 }
5298
5299 return signame;
5300 }
5301 #endif /* HAVE_STRSIGNAL */
5302
5303 /* arch-tag: edb43589-4e09-4544-b325-978b5b121dcf
5304 (do not change this comment) */
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