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(random, srandom): Declare explicitly.
[bpt/emacs.git] / src / sysdep.c
1 /* Interfaces to system-dependent kernel and library entries.
2 Copyright (C) 1985, 86,87,88,93,94,95, 1999, 2000
3 Free Software Foundation, Inc.
4
5 This file is part of GNU Emacs.
6
7 GNU Emacs is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
10 any later version.
11
12 GNU Emacs is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs; see the file COPYING. If not, write to
19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
21
22
23 #include "config.h"
24 #include <signal.h>
25 #include <setjmp.h>
26 #ifdef HAVE_UNISTD_H
27 #include <unistd.h>
28 #endif
29 #include "lisp.h"
30 /* Including stdlib.h isn't necessarily enough to get srandom
31 declared, e.g. without __USE_XOPEN_EXTENDED with glibc 2. */
32 #ifdef HAVE_RANDOM
33 extern long int random P_ ((void));
34 extern void srandom P_ ((unsigned int));
35 #endif
36
37 #include "blockinput.h"
38 #undef NULL
39
40 #ifdef macintosh
41 /* It is essential to include stdlib.h so that this file picks up
42 the correct definitions of rand, srand, and RAND_MAX.
43 Otherwise random numbers will not work correctly. */
44 #include <stdlib.h>
45
46 #ifndef subprocesses
47 /* Nonzero means delete a process right away if it exits (process.c). */
48 static int delete_exited_processes;
49 #endif
50 #endif /* macintosh */
51
52 #define min(x,y) ((x) > (y) ? (y) : (x))
53
54 #ifdef WINDOWSNT
55 #define read sys_read
56 #define write sys_write
57 #include <windows.h>
58 #ifndef NULL
59 #define NULL 0
60 #endif
61 #endif /* not WINDOWSNT */
62
63 /* Does anyone other than VMS need this? */
64 #ifndef fwrite
65 #define sys_fwrite fwrite
66 #else
67 #undef fwrite
68 #endif
69
70 #include <stdio.h>
71 #include <sys/types.h>
72 #include <sys/stat.h>
73 #include <errno.h>
74
75 /* Get _POSIX_VDISABLE, if it is available. */
76 #ifdef HAVE_UNISTD_H
77 #include <unistd.h>
78 #endif
79
80 #ifdef HAVE_STDLIB_H
81 #include <stdlib.h>
82 #endif
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 BSD4_1
138 #ifdef BSD_SYSTEM /* avoid writing defined (BSD_SYSTEM) || defined (USG)
139 because the vms compiler doesn't grok `defined' */
140 #include <fcntl.h>
141 #endif
142 #ifdef USG
143 #ifndef USG5
144 #include <fcntl.h>
145 #endif
146 #endif
147 #endif /* not 4.1 bsd */
148
149 #ifndef MSDOS
150 #include <sys/ioctl.h>
151 #endif
152
153 #include "systty.h"
154 #include "syswait.h"
155
156 #ifdef BROKEN_TIOCGWINSZ
157 #undef TIOCGWINSZ
158 #undef TIOCSWINSZ
159 #endif
160
161 #if defined (USG) || defined (DGUX)
162 #include <sys/utsname.h>
163 #ifndef MEMORY_IN_STRING_H
164 #include <memory.h>
165 #endif
166 #if defined (TIOCGWINSZ) || defined (ISC4_0)
167 #ifdef NEED_SIOCTL
168 #include <sys/sioctl.h>
169 #endif
170 #ifdef NEED_PTEM_H
171 #include <sys/stream.h>
172 #include <sys/ptem.h>
173 #endif
174 #endif /* TIOCGWINSZ or ISC4_0 */
175 #endif /* USG or DGUX */
176
177 extern int quit_char;
178
179 #include "keyboard.h"
180 #include "frame.h"
181 #include "window.h"
182 #include "termhooks.h"
183 #include "termchar.h"
184 #include "termopts.h"
185 #include "dispextern.h"
186 #include "process.h"
187
188 #ifdef WINDOWSNT
189 #include <direct.h>
190 /* In process.h which conflicts with the local copy. */
191 #define _P_WAIT 0
192 int _CRTAPI1 _spawnlp (int, const char *, const char *, ...);
193 int _CRTAPI1 _getpid (void);
194 #endif
195
196 #ifdef NONSYSTEM_DIR_LIBRARY
197 #include "ndir.h"
198 #endif /* NONSYSTEM_DIR_LIBRARY */
199
200 #include "syssignal.h"
201 #include "systime.h"
202 #ifdef HAVE_UTIME_H
203 #include <utime.h>
204 #endif
205
206 #ifndef HAVE_UTIMES
207 #ifndef HAVE_STRUCT_UTIMBUF
208 /* We want to use utime rather than utimes, but we couldn't find the
209 structure declaration. We'll use the traditional one. */
210 struct utimbuf {
211 long actime;
212 long modtime;
213 };
214 #endif
215 #endif
216
217 /* LPASS8 is new in 4.3, and makes cbreak mode provide all 8 bits. */
218 #ifndef LPASS8
219 #define LPASS8 0
220 #endif
221
222 #ifdef BSD4_1
223 #define LNOFLSH 0100000
224 #endif
225
226 static int baud_convert[] =
227 #ifdef BAUD_CONVERT
228 BAUD_CONVERT;
229 #else
230 {
231 0, 50, 75, 110, 135, 150, 200, 300, 600, 1200,
232 1800, 2400, 4800, 9600, 19200, 38400
233 };
234 #endif
235
236 #ifdef HAVE_SPEED_T
237 #include <termios.h>
238 #else
239 #if defined (HAVE_LIBNCURSES) && ! defined (NCURSES_OSPEED_T)
240 #else
241 #if defined (HAVE_TERMIOS_H) && defined (LINUX)
242 #include <termios.h>
243 #endif
244 #endif
245 #endif
246
247 int emacs_ospeed;
248
249 /* The file descriptor for Emacs's input terminal.
250 Under Unix, this is normally zero except when using X;
251 under VMS, we place the input channel number here. */
252 int input_fd;
253
254 void croak P_ ((char *));
255
256 #ifdef AIXHFT
257 void hft_init ();
258 void hft_reset ();
259 #endif
260
261 /* Temporary used by `sigblock' when defined in terms of signprocmask. */
262
263 SIGMASKTYPE sigprocmask_set;
264
265 \f
266 /* Specify a different file descriptor for further input operations. */
267
268 void
269 change_input_fd (fd)
270 int fd;
271 {
272 input_fd = fd;
273 }
274
275 /* Discard pending input on descriptor input_fd. */
276
277 void
278 discard_tty_input ()
279 {
280 #ifndef WINDOWSNT
281 struct emacs_tty buf;
282
283 if (noninteractive)
284 return;
285
286 /* Discarding input is not safe when the input could contain
287 replies from the X server. So don't do it. */
288 if (read_socket_hook)
289 return;
290
291 #ifdef VMS
292 end_kbd_input ();
293 SYS$QIOW (0, input_fd, IO$_READVBLK|IO$M_PURGE, input_iosb, 0, 0,
294 &buf.main, 0, 0, terminator_mask, 0, 0);
295 queue_kbd_input ();
296 #else /* not VMS */
297 #ifdef APOLLO
298 {
299 int zero = 0;
300 ioctl (input_fd, TIOCFLUSH, &zero);
301 }
302 #else /* not Apollo */
303 #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */
304 while (dos_keyread () != -1)
305 ;
306 #else /* not MSDOS */
307 EMACS_GET_TTY (input_fd, &buf);
308 EMACS_SET_TTY (input_fd, &buf, 0);
309 #endif /* not MSDOS */
310 #endif /* not Apollo */
311 #endif /* not VMS */
312 #endif /* not WINDOWSNT */
313 }
314
315 #ifdef SIGTSTP
316
317 /* Arrange for character C to be read as the next input from
318 the terminal. */
319
320 void
321 stuff_char (c)
322 char c;
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 LINUX as well? */
473 sigblock (sigmask (SIGCHLD));
474 if (0 > kill (pid, 0))
475 {
476 sigunblock (sigmask (SIGCHLD));
477 break;
478 }
479 sigpause (SIGEMPTYMASK);
480 #else /* not POSIX_SIGNALS */
481 #ifdef HAVE_SYSV_SIGPAUSE
482 sighold (SIGCHLD);
483 if (0 > kill (pid, 0))
484 {
485 sigrelse (SIGCHLD);
486 break;
487 }
488 sigpause (SIGCHLD);
489 #else /* not HAVE_SYSV_SIGPAUSE */
490 #ifdef WINDOWSNT
491 wait (0);
492 break;
493 #else /* not WINDOWSNT */
494 if (0 > kill (pid, 0))
495 break;
496 /* Using sleep instead of pause avoids timing error.
497 If the inferior dies just before the sleep,
498 we lose just one second. */
499 sleep (1);
500 #endif /* not WINDOWSNT */
501 #endif /* not HAVE_SYSV_SIGPAUSE */
502 #endif /* not POSIX_SIGNALS */
503 #endif /* not UNIPLUS */
504 #endif /* not BSD_SYSTEM, and not HPUX version >= 6 */
505 #endif /* not VMS */
506 #else /* not subprocesses */
507 #if __DJGPP__ > 1
508 break;
509 #else /* not __DJGPP__ > 1 */
510 #ifndef BSD4_1
511 if (kill (pid, 0) < 0)
512 break;
513 wait (0);
514 #else /* BSD4_1 */
515 int status;
516 status = wait (0);
517 if (status == pid || status == -1)
518 break;
519 #endif /* BSD4_1 */
520 #endif /* not __DJGPP__ > 1*/
521 #endif /* not subprocesses */
522 }
523 }
524
525 #ifdef subprocesses
526
527 /*
528 * flush any pending output
529 * (may flush input as well; it does not matter the way we use it)
530 */
531
532 void
533 flush_pending_output (channel)
534 int channel;
535 {
536 #ifdef HAVE_TERMIOS
537 /* If we try this, we get hit with SIGTTIN, because
538 the child's tty belongs to the child's pgrp. */
539 #else
540 #ifdef TCFLSH
541 ioctl (channel, TCFLSH, 1);
542 #else
543 #ifdef TIOCFLUSH
544 int zero = 0;
545 /* 3rd arg should be ignored
546 but some 4.2 kernels actually want the address of an int
547 and nonzero means something different. */
548 ioctl (channel, TIOCFLUSH, &zero);
549 #endif
550 #endif
551 #endif
552 }
553 \f
554 #ifndef VMS
555 /* Set up the terminal at the other end of a pseudo-terminal that
556 we will be controlling an inferior through.
557 It should not echo or do line-editing, since that is done
558 in Emacs. No padding needed for insertion into an Emacs buffer. */
559
560 void
561 child_setup_tty (out)
562 int out;
563 {
564 #ifndef DOS_NT
565 struct emacs_tty s;
566
567 EMACS_GET_TTY (out, &s);
568
569 #if defined (HAVE_TERMIO) || defined (HAVE_TERMIOS)
570 s.main.c_oflag |= OPOST; /* Enable output postprocessing */
571 s.main.c_oflag &= ~ONLCR; /* Disable map of NL to CR-NL on output */
572 #ifdef NLDLY
573 s.main.c_oflag &= ~(NLDLY|CRDLY|TABDLY|BSDLY|VTDLY|FFDLY);
574 /* No output delays */
575 #endif
576 s.main.c_lflag &= ~ECHO; /* Disable echo */
577 s.main.c_lflag |= ISIG; /* Enable signals */
578 #ifdef IUCLC
579 s.main.c_iflag &= ~IUCLC; /* Disable downcasing on input. */
580 #endif
581 #ifdef ISTRIP
582 s.main.c_iflag &= ~ISTRIP; /* don't strip 8th bit on input */
583 #endif
584 #ifdef OLCUC
585 s.main.c_oflag &= ~OLCUC; /* Disable upcasing on output. */
586 #endif
587 s.main.c_oflag &= ~TAB3; /* Disable tab expansion */
588 s.main.c_cflag = (s.main.c_cflag & ~CSIZE) | CS8; /* Don't strip 8th bit */
589 #if 0
590 /* Said to be unnecessary: */
591 s.main.c_cc[VMIN] = 1; /* minimum number of characters to accept */
592 s.main.c_cc[VTIME] = 0; /* wait forever for at least 1 character */
593 #endif
594
595 s.main.c_lflag |= ICANON; /* Enable erase/kill and eof processing */
596 s.main.c_cc[VEOF] = 04; /* insure that EOF is Control-D */
597 s.main.c_cc[VERASE] = CDISABLE; /* disable erase processing */
598 s.main.c_cc[VKILL] = CDISABLE; /* disable kill processing */
599
600 #ifdef HPUX
601 s.main.c_cflag = (s.main.c_cflag & ~CBAUD) | B9600; /* baud rate sanity */
602 #endif /* HPUX */
603
604 #ifdef AIX
605 /* AIX enhanced edit loses NULs, so disable it */
606 #ifndef IBMR2AIX
607 s.main.c_line = 0;
608 s.main.c_iflag &= ~ASCEDIT;
609 #endif
610 /* Also, PTY overloads NUL and BREAK.
611 don't ignore break, but don't signal either, so it looks like NUL. */
612 s.main.c_iflag &= ~IGNBRK;
613 s.main.c_iflag &= ~BRKINT;
614 /* QUIT and INTR work better as signals, so disable character forms */
615 s.main.c_cc[VINTR] = 0377;
616 #ifdef SIGNALS_VIA_CHARACTERS
617 /* the QUIT and INTR character are used in process_send_signal
618 so set them here to something useful. */
619 if (s.main.c_cc[VQUIT] == 0377)
620 s.main.c_cc[VQUIT] = '\\'&037; /* Control-\ */
621 if (s.main.c_cc[VINTR] == 0377)
622 s.main.c_cc[VINTR] = 'C'&037; /* Control-C */
623 #else /* no TIOCGPGRP or no TIOCGLTC or no TIOCGETC */
624 /* QUIT and INTR work better as signals, so disable character forms */
625 s.main.c_cc[VQUIT] = 0377;
626 s.main.c_cc[VINTR] = 0377;
627 s.main.c_lflag &= ~ISIG;
628 #endif /* no TIOCGPGRP or no TIOCGLTC or no TIOCGETC */
629 s.main.c_cc[VEOL] = 0377;
630 s.main.c_cflag = (s.main.c_cflag & ~CBAUD) | B9600; /* baud rate sanity */
631 #endif /* AIX */
632
633 #else /* not HAVE_TERMIO */
634
635 s.main.sg_flags &= ~(ECHO | CRMOD | ANYP | ALLDELAY | RAW | LCASE
636 | CBREAK | TANDEM);
637 s.main.sg_flags |= LPASS8;
638 s.main.sg_erase = 0377;
639 s.main.sg_kill = 0377;
640 s.lmode = LLITOUT | s.lmode; /* Don't strip 8th bit */
641
642 #endif /* not HAVE_TERMIO */
643
644 EMACS_SET_TTY (out, &s, 0);
645
646 #ifdef BSD4_1
647 if (interrupt_input)
648 reset_sigio ();
649 #endif /* BSD4_1 */
650 #ifdef RTU
651 {
652 int zero = 0;
653 ioctl (out, FIOASYNC, &zero);
654 }
655 #endif /* RTU */
656 #endif /* not DOS_NT */
657 }
658 #endif /* not VMS */
659
660 #endif /* subprocesses */
661 \f
662 /* Record a signal code and the handler for it. */
663 struct save_signal
664 {
665 int code;
666 SIGTYPE (*handler) P_ ((int));
667 };
668
669 static void save_signal_handlers P_ ((struct save_signal *));
670 static void restore_signal_handlers P_ ((struct save_signal *));
671
672 /* Suspend the Emacs process; give terminal to its superior. */
673
674 void
675 sys_suspend ()
676 {
677 #ifdef VMS
678 /* "Foster" parentage allows emacs to return to a subprocess that attached
679 to the current emacs as a cheaper than starting a whole new process. This
680 is set up by KEPTEDITOR.COM. */
681 unsigned long parent_id, foster_parent_id;
682 char *fpid_string;
683
684 fpid_string = getenv ("EMACS_PARENT_PID");
685 if (fpid_string != NULL)
686 {
687 sscanf (fpid_string, "%x", &foster_parent_id);
688 if (foster_parent_id != 0)
689 parent_id = foster_parent_id;
690 else
691 parent_id = getppid ();
692 }
693 else
694 parent_id = getppid ();
695
696 xfree (fpid_string); /* On VMS, this was malloc'd */
697
698 if (parent_id && parent_id != 0xffffffff)
699 {
700 SIGTYPE (*oldsig)() = (int) signal (SIGINT, SIG_IGN);
701 int status = LIB$ATTACH (&parent_id) & 1;
702 signal (SIGINT, oldsig);
703 return status;
704 }
705 else
706 {
707 struct {
708 int l;
709 char *a;
710 } d_prompt;
711 d_prompt.l = sizeof ("Emacs: "); /* Our special prompt */
712 d_prompt.a = "Emacs: "; /* Just a reminder */
713 LIB$SPAWN (0, 0, 0, 0, 0, 0, 0, 0, 0, 0, &d_prompt, 0);
714 return 1;
715 }
716 return -1;
717 #else
718 #if defined (SIGTSTP) && !defined (MSDOS)
719
720 {
721 int pgrp = EMACS_GETPGRP (0);
722 EMACS_KILLPG (pgrp, SIGTSTP);
723 }
724
725 #else /* No SIGTSTP */
726 #ifdef USG_JOBCTRL /* If you don't know what this is don't mess with it */
727 ptrace (0, 0, 0, 0); /* set for ptrace - caught by csh */
728 kill (getpid (), SIGQUIT);
729
730 #else /* No SIGTSTP or USG_JOBCTRL */
731
732 /* On a system where suspending is not implemented,
733 instead fork a subshell and let it talk directly to the terminal
734 while we wait. */
735 sys_subshell ();
736
737 #endif /* no USG_JOBCTRL */
738 #endif /* no SIGTSTP */
739 #endif /* not VMS */
740 }
741
742 /* Fork a subshell. */
743
744 #ifndef macintosh
745 void
746 sys_subshell ()
747 {
748 #ifndef VMS
749 #ifdef DOS_NT /* Demacs 1.1.2 91/10/20 Manabu Higashida */
750 int st;
751 char oldwd[MAXPATHLEN+1]; /* Fixed length is safe on MSDOS. */
752 #endif
753 int pid;
754 struct save_signal saved_handlers[5];
755 Lisp_Object dir;
756 unsigned char *str = 0;
757 int len;
758
759 saved_handlers[0].code = SIGINT;
760 saved_handlers[1].code = SIGQUIT;
761 saved_handlers[2].code = SIGTERM;
762 #ifdef SIGIO
763 saved_handlers[3].code = SIGIO;
764 saved_handlers[4].code = 0;
765 #else
766 saved_handlers[3].code = 0;
767 #endif
768
769 /* Mentioning current_buffer->buffer would mean including buffer.h,
770 which somehow wedges the hp compiler. So instead... */
771
772 dir = intern ("default-directory");
773 if (NILP (Fboundp (dir)))
774 goto xyzzy;
775 dir = Fsymbol_value (dir);
776 if (!STRINGP (dir))
777 goto xyzzy;
778
779 dir = expand_and_dir_to_file (Funhandled_file_name_directory (dir), Qnil);
780 str = (unsigned char *) alloca (XSTRING (dir)->size + 2);
781 len = XSTRING (dir)->size;
782 bcopy (XSTRING (dir)->data, str, len);
783 if (str[len - 1] != '/') str[len++] = '/';
784 str[len] = 0;
785 xyzzy:
786
787 #ifdef DOS_NT
788 pid = 0;
789 #if __DJGPP__ > 1
790 save_signal_handlers (saved_handlers);
791 synch_process_alive = 1;
792 #endif /* __DJGPP__ > 1 */
793 #else
794 pid = vfork ();
795 if (pid == -1)
796 error ("Can't spawn subshell");
797 #endif
798
799 if (pid == 0)
800 {
801 char *sh = 0;
802
803 #ifdef DOS_NT /* MW, Aug 1993 */
804 getwd (oldwd);
805 if (sh == 0)
806 sh = (char *) egetenv ("SUSPEND"); /* KFS, 1994-12-14 */
807 #endif
808 if (sh == 0)
809 sh = (char *) egetenv ("SHELL");
810 if (sh == 0)
811 sh = "sh";
812
813 /* Use our buffer's default directory for the subshell. */
814 if (str)
815 chdir ((char *) str);
816
817 #ifdef subprocesses
818 close_process_descs (); /* Close Emacs's pipes/ptys */
819 #endif
820
821 #ifdef SET_EMACS_PRIORITY
822 {
823 extern int emacs_priority;
824
825 if (emacs_priority < 0)
826 nice (-emacs_priority);
827 }
828 #endif
829
830 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */
831 st = system (sh);
832 chdir (oldwd);
833 #if 0 /* This is also reported if last command executed in subshell failed, KFS */
834 if (st)
835 report_file_error ("Can't execute subshell", Fcons (build_string (sh), Qnil));
836 #endif
837 #else /* not MSDOS */
838 #ifdef WINDOWSNT
839 /* Waits for process completion */
840 pid = _spawnlp (_P_WAIT, sh, sh, NULL);
841 chdir (oldwd);
842 if (pid == -1)
843 write (1, "Can't execute subshell", 22);
844 #else /* not WINDOWSNT */
845 execlp (sh, sh, 0);
846 write (1, "Can't execute subshell", 22);
847 _exit (1);
848 #endif /* not WINDOWSNT */
849 #endif /* not MSDOS */
850 }
851
852 /* Do this now if we did not do it before. */
853 #if !defined (MSDOS) || __DJGPP__ == 1
854 save_signal_handlers (saved_handlers);
855 synch_process_alive = 1;
856 #endif
857
858 #ifndef DOS_NT
859 wait_for_termination (pid);
860 #endif
861 restore_signal_handlers (saved_handlers);
862 synch_process_alive = 0;
863 #endif /* !VMS */
864 }
865 #endif /* !macintosh */
866
867 static void
868 save_signal_handlers (saved_handlers)
869 struct save_signal *saved_handlers;
870 {
871 while (saved_handlers->code)
872 {
873 saved_handlers->handler
874 = (SIGTYPE (*) P_ ((int))) signal (saved_handlers->code, SIG_IGN);
875 saved_handlers++;
876 }
877 }
878
879 static void
880 restore_signal_handlers (saved_handlers)
881 struct save_signal *saved_handlers;
882 {
883 while (saved_handlers->code)
884 {
885 signal (saved_handlers->code, saved_handlers->handler);
886 saved_handlers++;
887 }
888 }
889 \f
890 #ifdef F_SETFL
891
892 int old_fcntl_flags;
893
894 void
895 init_sigio (fd)
896 int fd;
897 {
898 #ifdef FASYNC
899 old_fcntl_flags = fcntl (fd, F_GETFL, 0) & ~FASYNC;
900 fcntl (fd, F_SETFL, old_fcntl_flags | FASYNC);
901 #endif
902 interrupts_deferred = 0;
903 }
904
905 void
906 reset_sigio ()
907 {
908 unrequest_sigio ();
909 }
910
911 #ifdef FASYNC /* F_SETFL does not imply existence of FASYNC */
912
913 void
914 request_sigio ()
915 {
916 if (read_socket_hook)
917 return;
918
919 #ifdef SIGWINCH
920 sigunblock (sigmask (SIGWINCH));
921 #endif
922 fcntl (input_fd, F_SETFL, old_fcntl_flags | FASYNC);
923
924 interrupts_deferred = 0;
925 }
926
927 void
928 unrequest_sigio ()
929 {
930 if (read_socket_hook)
931 return;
932
933 #ifdef SIGWINCH
934 sigblock (sigmask (SIGWINCH));
935 #endif
936 fcntl (input_fd, F_SETFL, old_fcntl_flags);
937 interrupts_deferred = 1;
938 }
939
940 #else /* no FASYNC */
941 #ifdef STRIDE /* Stride doesn't have FASYNC - use FIOASYNC */
942
943 void
944 request_sigio ()
945 {
946 int on = 1;
947
948 if (read_socket_hook)
949 return;
950
951 ioctl (input_fd, FIOASYNC, &on);
952 interrupts_deferred = 0;
953 }
954
955 void
956 unrequest_sigio ()
957 {
958 int off = 0;
959
960 if (read_socket_hook)
961 return;
962
963 ioctl (input_fd, FIOASYNC, &off);
964 interrupts_deferred = 1;
965 }
966
967 #else /* not FASYNC, not STRIDE */
968
969 #ifdef _CX_UX
970
971 #include <termios.h>
972
973 void
974 request_sigio ()
975 {
976 int on = 1;
977 sigset_t st;
978
979 if (read_socket_hook)
980 return;
981
982 sigemptyset (&st);
983 sigaddset (&st, SIGIO);
984 ioctl (input_fd, FIOASYNC, &on);
985 interrupts_deferred = 0;
986 sigprocmask (SIG_UNBLOCK, &st, (sigset_t *)0);
987 }
988
989 void
990 unrequest_sigio ()
991 {
992 int off = 0;
993
994 if (read_socket_hook)
995 return;
996
997 ioctl (input_fd, FIOASYNC, &off);
998 interrupts_deferred = 1;
999 }
1000
1001 #else /* ! _CX_UX */
1002
1003 void
1004 request_sigio ()
1005 {
1006 if (read_socket_hook)
1007 return;
1008
1009 croak ("request_sigio");
1010 }
1011
1012 void
1013 unrequest_sigio ()
1014 {
1015 if (read_socket_hook)
1016 return;
1017
1018 croak ("unrequest_sigio");
1019 }
1020
1021 #endif /* _CX_UX */
1022 #endif /* STRIDE */
1023 #endif /* FASYNC */
1024 #endif /* F_SETFL */
1025 \f
1026 /* Saving and restoring the process group of Emacs's terminal. */
1027
1028 #ifdef BSD_PGRPS
1029
1030 /* The process group of which Emacs was a member when it initially
1031 started.
1032
1033 If Emacs was in its own process group (i.e. inherited_pgroup ==
1034 getpid ()), then we know we're running under a shell with job
1035 control (Emacs would never be run as part of a pipeline).
1036 Everything is fine.
1037
1038 If Emacs was not in its own process group, then we know we're
1039 running under a shell (or a caller) that doesn't know how to
1040 separate itself from Emacs (like sh). Emacs must be in its own
1041 process group in order to receive SIGIO correctly. In this
1042 situation, we put ourselves in our own pgroup, forcibly set the
1043 tty's pgroup to our pgroup, and make sure to restore and reinstate
1044 the tty's pgroup just like any other terminal setting. If
1045 inherited_group was not the tty's pgroup, then we'll get a
1046 SIGTTmumble when we try to change the tty's pgroup, and a CONT if
1047 it goes foreground in the future, which is what should happen. */
1048 int inherited_pgroup;
1049
1050 /* Split off the foreground process group to Emacs alone.
1051 When we are in the foreground, but not started in our own process
1052 group, redirect the TTY to point to our own process group. We need
1053 to be in our own process group to receive SIGIO properly. */
1054 void
1055 narrow_foreground_group ()
1056 {
1057 int me = getpid ();
1058
1059 setpgrp (0, inherited_pgroup);
1060 if (inherited_pgroup != me)
1061 EMACS_SET_TTY_PGRP (input_fd, &me);
1062 setpgrp (0, me);
1063 }
1064
1065 /* Set the tty to our original foreground group. */
1066 void
1067 widen_foreground_group ()
1068 {
1069 if (inherited_pgroup != getpid ())
1070 EMACS_SET_TTY_PGRP (input_fd, &inherited_pgroup);
1071 setpgrp (0, inherited_pgroup);
1072 }
1073
1074 #endif /* BSD_PGRPS */
1075 \f
1076 /* Getting and setting emacs_tty structures. */
1077
1078 /* Set *TC to the parameters associated with the terminal FD.
1079 Return zero if all's well, or -1 if we ran into an error we
1080 couldn't deal with. */
1081 int
1082 emacs_get_tty (fd, settings)
1083 int fd;
1084 struct emacs_tty *settings;
1085 {
1086 /* Retrieve the primary parameters - baud rate, character size, etcetera. */
1087 #ifdef HAVE_TCATTR
1088 /* We have those nifty POSIX tcmumbleattr functions. */
1089 bzero (&settings->main, sizeof (settings->main));
1090 if (tcgetattr (fd, &settings->main) < 0)
1091 return -1;
1092
1093 #else
1094 #ifdef HAVE_TERMIO
1095 /* The SYSV-style interface? */
1096 if (ioctl (fd, TCGETA, &settings->main) < 0)
1097 return -1;
1098
1099 #else
1100 #ifdef VMS
1101 /* Vehemently Monstrous System? :-) */
1102 if (! (SYS$QIOW (0, fd, IO$_SENSEMODE, settings, 0, 0,
1103 &settings->main.class, 12, 0, 0, 0, 0)
1104 & 1))
1105 return -1;
1106
1107 #else
1108 #ifndef DOS_NT
1109 /* I give up - I hope you have the BSD ioctls. */
1110 if (ioctl (fd, TIOCGETP, &settings->main) < 0)
1111 return -1;
1112 #endif /* not DOS_NT */
1113 #endif
1114 #endif
1115 #endif
1116
1117 /* Suivant - Do we have to get struct ltchars data? */
1118 #ifdef HAVE_LTCHARS
1119 if (ioctl (fd, TIOCGLTC, &settings->ltchars) < 0)
1120 return -1;
1121 #endif
1122
1123 /* How about a struct tchars and a wordful of lmode bits? */
1124 #ifdef HAVE_TCHARS
1125 if (ioctl (fd, TIOCGETC, &settings->tchars) < 0
1126 || ioctl (fd, TIOCLGET, &settings->lmode) < 0)
1127 return -1;
1128 #endif
1129
1130 /* We have survived the tempest. */
1131 return 0;
1132 }
1133
1134
1135 /* Set the parameters of the tty on FD according to the contents of
1136 *SETTINGS. If FLUSHP is non-zero, we discard input.
1137 Return 0 if all went well, and -1 if anything failed. */
1138
1139 int
1140 emacs_set_tty (fd, settings, flushp)
1141 int fd;
1142 struct emacs_tty *settings;
1143 int flushp;
1144 {
1145 /* Set the primary parameters - baud rate, character size, etcetera. */
1146 #ifdef HAVE_TCATTR
1147 int i;
1148 /* We have those nifty POSIX tcmumbleattr functions.
1149 William J. Smith <wjs@wiis.wang.com> writes:
1150 "POSIX 1003.1 defines tcsetattr to return success if it was
1151 able to perform any of the requested actions, even if some
1152 of the requested actions could not be performed.
1153 We must read settings back to ensure tty setup properly.
1154 AIX requires this to keep tty from hanging occasionally." */
1155 /* This make sure that we don't loop indefinitely in here. */
1156 for (i = 0 ; i < 10 ; i++)
1157 if (tcsetattr (fd, flushp ? TCSAFLUSH : TCSADRAIN, &settings->main) < 0)
1158 {
1159 if (errno == EINTR)
1160 continue;
1161 else
1162 return -1;
1163 }
1164 else
1165 {
1166 struct termios new;
1167
1168 bzero (&new, sizeof (new));
1169 /* Get the current settings, and see if they're what we asked for. */
1170 tcgetattr (fd, &new);
1171 /* We cannot use memcmp on the whole structure here because under
1172 * aix386 the termios structure has some reserved field that may
1173 * not be filled in.
1174 */
1175 if ( new.c_iflag == settings->main.c_iflag
1176 && new.c_oflag == settings->main.c_oflag
1177 && new.c_cflag == settings->main.c_cflag
1178 && new.c_lflag == settings->main.c_lflag
1179 && memcmp (new.c_cc, settings->main.c_cc, NCCS) == 0)
1180 break;
1181 else
1182 continue;
1183 }
1184
1185 #else
1186 #ifdef HAVE_TERMIO
1187 /* The SYSV-style interface? */
1188 if (ioctl (fd, flushp ? TCSETAF : TCSETAW, &settings->main) < 0)
1189 return -1;
1190
1191 #else
1192 #ifdef VMS
1193 /* Vehemently Monstrous System? :-) */
1194 if (! (SYS$QIOW (0, fd, IO$_SETMODE, &input_iosb, 0, 0,
1195 &settings->main.class, 12, 0, 0, 0, 0)
1196 & 1))
1197 return -1;
1198
1199 #else
1200 #ifndef DOS_NT
1201 /* I give up - I hope you have the BSD ioctls. */
1202 if (ioctl (fd, (flushp) ? TIOCSETP : TIOCSETN, &settings->main) < 0)
1203 return -1;
1204 #endif /* not DOS_NT */
1205
1206 #endif
1207 #endif
1208 #endif
1209
1210 /* Suivant - Do we have to get struct ltchars data? */
1211 #ifdef HAVE_LTCHARS
1212 if (ioctl (fd, TIOCSLTC, &settings->ltchars) < 0)
1213 return -1;
1214 #endif
1215
1216 /* How about a struct tchars and a wordful of lmode bits? */
1217 #ifdef HAVE_TCHARS
1218 if (ioctl (fd, TIOCSETC, &settings->tchars) < 0
1219 || ioctl (fd, TIOCLSET, &settings->lmode) < 0)
1220 return -1;
1221 #endif
1222
1223 /* We have survived the tempest. */
1224 return 0;
1225 }
1226
1227 \f
1228 /* The initial tty mode bits */
1229 struct emacs_tty old_tty;
1230
1231 /* 1 if we have been through init_sys_modes. */
1232 int term_initted;
1233
1234 /* 1 if outer tty status has been recorded. */
1235 int old_tty_valid;
1236
1237 #ifdef BSD4_1
1238 /* BSD 4.1 needs to keep track of the lmode bits in order to start
1239 sigio. */
1240 int lmode;
1241 #endif
1242
1243 #ifndef F_SETOWN_BUG
1244 #ifdef F_SETOWN
1245 int old_fcntl_owner;
1246 #endif /* F_SETOWN */
1247 #endif /* F_SETOWN_BUG */
1248
1249 /* This may also be defined in stdio,
1250 but if so, this does no harm,
1251 and using the same name avoids wasting the other one's space. */
1252
1253 #ifdef nec_ews_svr4
1254 extern char *_sobuf ;
1255 #else
1256 #if defined (USG) || defined (DGUX)
1257 unsigned char _sobuf[BUFSIZ+8];
1258 #else
1259 char _sobuf[BUFSIZ];
1260 #endif
1261 #endif
1262
1263 #ifdef HAVE_LTCHARS
1264 static struct ltchars new_ltchars = {-1,-1,-1,-1,-1,-1};
1265 #endif
1266 #ifdef HAVE_TCHARS
1267 static struct tchars new_tchars = {-1,-1,-1,-1,-1,-1};
1268 #endif
1269
1270 void
1271 init_sys_modes ()
1272 {
1273 struct emacs_tty tty;
1274
1275 #ifdef macintosh
1276 /* cus-start.el complains if delete-exited-processes is not defined */
1277 #ifndef subprocesses
1278 DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes,
1279 "*Non-nil means delete processes immediately when they exit.\n\
1280 nil means don't delete them until `list-processes' is run.");
1281 delete_exited_processes = 0;
1282 #endif
1283 #endif /* not macintosh */
1284
1285 #ifdef VMS
1286 #if 0
1287 static int oob_chars[2] = {0, 1 << 7}; /* catch C-g's */
1288 extern int (*interrupt_signal) ();
1289 #endif
1290 #endif
1291
1292 Vtty_erase_char = Qnil;
1293
1294 if (noninteractive)
1295 return;
1296
1297 #ifdef VMS
1298 if (!input_ef)
1299 input_ef = get_kbd_event_flag ();
1300 /* LIB$GET_EF (&input_ef); */
1301 SYS$CLREF (input_ef);
1302 waiting_for_ast = 0;
1303 if (!timer_ef)
1304 timer_ef = get_timer_event_flag ();
1305 /* LIB$GET_EF (&timer_ef); */
1306 SYS$CLREF (timer_ef);
1307 #if 0
1308 if (!process_ef)
1309 {
1310 LIB$GET_EF (&process_ef);
1311 SYS$CLREF (process_ef);
1312 }
1313 if (input_ef / 32 != process_ef / 32)
1314 croak ("Input and process event flags in different clusters.");
1315 #endif
1316 if (input_ef / 32 != timer_ef / 32)
1317 croak ("Input and timer event flags in different clusters.");
1318 #if 0
1319 input_eflist = ((unsigned) 1 << (input_ef % 32)) |
1320 ((unsigned) 1 << (process_ef % 32));
1321 #endif
1322 timer_eflist = ((unsigned) 1 << (input_ef % 32)) |
1323 ((unsigned) 1 << (timer_ef % 32));
1324 #ifndef VMS4_4
1325 sys_access_reinit ();
1326 #endif
1327 #endif /* not VMS */
1328
1329 #ifdef BSD_PGRPS
1330 if (! read_socket_hook && EQ (Vwindow_system, Qnil))
1331 narrow_foreground_group ();
1332 #endif
1333
1334 #ifdef HAVE_WINDOW_SYSTEM
1335 /* Emacs' window system on MSDOG uses the `internal terminal' and therefore
1336 needs the initialization code below. */
1337 if (!read_socket_hook && EQ (Vwindow_system, Qnil))
1338 #endif
1339 {
1340 EMACS_GET_TTY (input_fd, &old_tty);
1341
1342 old_tty_valid = 1;
1343
1344 tty = old_tty;
1345
1346 #if defined (HAVE_TERMIO) || defined (HAVE_TERMIOS)
1347 XSETINT (Vtty_erase_char, old_tty.main.c_cc[VERASE]);
1348
1349 #ifdef DGUX
1350 /* This allows meta to be sent on 8th bit. */
1351 tty.main.c_iflag &= ~INPCK; /* don't check input for parity */
1352 #endif
1353 tty.main.c_iflag |= (IGNBRK); /* Ignore break condition */
1354 tty.main.c_iflag &= ~ICRNL; /* Disable map of CR to NL on input */
1355 #ifdef INLCR /* I'm just being cautious,
1356 since I can't check how widespread INLCR is--rms. */
1357 tty.main.c_iflag &= ~INLCR; /* Disable map of NL to CR on input */
1358 #endif
1359 #ifdef ISTRIP
1360 tty.main.c_iflag &= ~ISTRIP; /* don't strip 8th bit on input */
1361 #endif
1362 tty.main.c_lflag &= ~ECHO; /* Disable echo */
1363 tty.main.c_lflag &= ~ICANON; /* Disable erase/kill processing */
1364 #ifdef IEXTEN
1365 tty.main.c_lflag &= ~IEXTEN; /* Disable other editing characters. */
1366 #endif
1367 tty.main.c_lflag |= ISIG; /* Enable signals */
1368 if (flow_control)
1369 {
1370 tty.main.c_iflag |= IXON; /* Enable start/stop output control */
1371 #ifdef IXANY
1372 tty.main.c_iflag &= ~IXANY;
1373 #endif /* IXANY */
1374 }
1375 else
1376 tty.main.c_iflag &= ~IXON; /* Disable start/stop output control */
1377 tty.main.c_oflag &= ~ONLCR; /* Disable map of NL to CR-NL
1378 on output */
1379 tty.main.c_oflag &= ~TAB3; /* Disable tab expansion */
1380 #ifdef CS8
1381 if (meta_key)
1382 {
1383 tty.main.c_cflag |= CS8; /* allow 8th bit on input */
1384 tty.main.c_cflag &= ~PARENB;/* Don't check parity */
1385 }
1386 #endif
1387 tty.main.c_cc[VINTR] = quit_char; /* C-g (usually) gives SIGINT */
1388 /* Set up C-g for both SIGQUIT and SIGINT.
1389 We don't know which we will get, but we handle both alike
1390 so which one it really gives us does not matter. */
1391 tty.main.c_cc[VQUIT] = quit_char;
1392 tty.main.c_cc[VMIN] = 1; /* Input should wait for at least 1 char */
1393 tty.main.c_cc[VTIME] = 0; /* no matter how long that takes. */
1394 #ifdef VSWTCH
1395 tty.main.c_cc[VSWTCH] = CDISABLE; /* Turn off shell layering use
1396 of C-z */
1397 #endif /* VSWTCH */
1398
1399 #if defined (mips) || defined (HAVE_TCATTR)
1400 #ifdef VSUSP
1401 tty.main.c_cc[VSUSP] = CDISABLE; /* Turn off mips handling of C-z. */
1402 #endif /* VSUSP */
1403 #ifdef V_DSUSP
1404 tty.main.c_cc[V_DSUSP] = CDISABLE; /* Turn off mips handling of C-y. */
1405 #endif /* V_DSUSP */
1406 #ifdef VDSUSP /* Some systems have VDSUSP, some have V_DSUSP. */
1407 tty.main.c_cc[VDSUSP] = CDISABLE;
1408 #endif /* VDSUSP */
1409 #ifdef VLNEXT
1410 tty.main.c_cc[VLNEXT] = CDISABLE;
1411 #endif /* VLNEXT */
1412 #ifdef VREPRINT
1413 tty.main.c_cc[VREPRINT] = CDISABLE;
1414 #endif /* VREPRINT */
1415 #ifdef VWERASE
1416 tty.main.c_cc[VWERASE] = CDISABLE;
1417 #endif /* VWERASE */
1418 #ifdef VDISCARD
1419 tty.main.c_cc[VDISCARD] = CDISABLE;
1420 #endif /* VDISCARD */
1421
1422 if (flow_control)
1423 {
1424 #ifdef VSTART
1425 tty.main.c_cc[VSTART] = '\021';
1426 #endif /* VSTART */
1427 #ifdef VSTOP
1428 tty.main.c_cc[VSTOP] = '\023';
1429 #endif /* VSTOP */
1430 }
1431 else
1432 {
1433 #ifdef VSTART
1434 tty.main.c_cc[VSTART] = CDISABLE;
1435 #endif /* VSTART */
1436 #ifdef VSTOP
1437 tty.main.c_cc[VSTOP] = CDISABLE;
1438 #endif /* VSTOP */
1439 }
1440 #endif /* mips or HAVE_TCATTR */
1441
1442 #ifdef SET_LINE_DISCIPLINE
1443 /* Need to explicitly request TERMIODISC line discipline or
1444 Ultrix's termios does not work correctly. */
1445 tty.main.c_line = SET_LINE_DISCIPLINE;
1446 #endif
1447 #ifdef AIX
1448 #ifndef IBMR2AIX
1449 /* AIX enhanced edit loses NULs, so disable it. */
1450 tty.main.c_line = 0;
1451 tty.main.c_iflag &= ~ASCEDIT;
1452 #else
1453 tty.main.c_cc[VSTRT] = 255;
1454 tty.main.c_cc[VSTOP] = 255;
1455 tty.main.c_cc[VSUSP] = 255;
1456 tty.main.c_cc[VDSUSP] = 255;
1457 #endif /* IBMR2AIX */
1458 if (flow_control)
1459 {
1460 #ifdef VSTART
1461 tty.main.c_cc[VSTART] = '\021';
1462 #endif /* VSTART */
1463 #ifdef VSTOP
1464 tty.main.c_cc[VSTOP] = '\023';
1465 #endif /* VSTOP */
1466 }
1467 /* Also, PTY overloads NUL and BREAK.
1468 don't ignore break, but don't signal either, so it looks like NUL.
1469 This really serves a purpose only if running in an XTERM window
1470 or via TELNET or the like, but does no harm elsewhere. */
1471 tty.main.c_iflag &= ~IGNBRK;
1472 tty.main.c_iflag &= ~BRKINT;
1473 #endif
1474 #else /* if not HAVE_TERMIO */
1475 #ifdef VMS
1476 tty.main.tt_char |= TT$M_NOECHO;
1477 if (meta_key)
1478 tty.main.tt_char |= TT$M_EIGHTBIT;
1479 if (flow_control)
1480 tty.main.tt_char |= TT$M_TTSYNC;
1481 else
1482 tty.main.tt_char &= ~TT$M_TTSYNC;
1483 tty.main.tt2_char |= TT2$M_PASTHRU | TT2$M_XON;
1484 #else /* not VMS (BSD, that is) */
1485 #ifndef DOS_NT
1486 XSETINT (Vtty_erase_char, tty.main.sg_erase);
1487 tty.main.sg_flags &= ~(ECHO | CRMOD | XTABS);
1488 if (meta_key)
1489 tty.main.sg_flags |= ANYP;
1490 tty.main.sg_flags |= interrupt_input ? RAW : CBREAK;
1491 #endif /* not DOS_NT */
1492 #endif /* not VMS (BSD, that is) */
1493 #endif /* not HAVE_TERMIO */
1494
1495 /* If going to use CBREAK mode, we must request C-g to interrupt
1496 and turn off start and stop chars, etc. If not going to use
1497 CBREAK mode, do this anyway so as to turn off local flow
1498 control for user coming over network on 4.2; in this case,
1499 only t_stopc and t_startc really matter. */
1500 #ifndef HAVE_TERMIO
1501 #ifdef HAVE_TCHARS
1502 /* Note: if not using CBREAK mode, it makes no difference how we
1503 set this */
1504 tty.tchars = new_tchars;
1505 tty.tchars.t_intrc = quit_char;
1506 if (flow_control)
1507 {
1508 tty.tchars.t_startc = '\021';
1509 tty.tchars.t_stopc = '\023';
1510 }
1511
1512 tty.lmode = LDECCTQ | LLITOUT | LPASS8 | LNOFLSH | old_tty.lmode;
1513 #ifdef ultrix
1514 /* Under Ultrix 4.2a, leaving this out doesn't seem to hurt
1515 anything, and leaving it in breaks the meta key. Go figure. */
1516 tty.lmode &= ~LLITOUT;
1517 #endif
1518
1519 #ifdef BSD4_1
1520 lmode = tty.lmode;
1521 #endif
1522
1523 #endif /* HAVE_TCHARS */
1524 #endif /* not HAVE_TERMIO */
1525
1526 #ifdef HAVE_LTCHARS
1527 tty.ltchars = new_ltchars;
1528 #endif /* HAVE_LTCHARS */
1529 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida, MW Aug 1993 */
1530 if (!term_initted)
1531 internal_terminal_init ();
1532 dos_ttraw ();
1533 #endif
1534
1535 EMACS_SET_TTY (input_fd, &tty, 0);
1536
1537 /* This code added to insure that, if flow-control is not to be used,
1538 we have an unlocked terminal at the start. */
1539
1540 #ifdef TCXONC
1541 if (!flow_control) ioctl (input_fd, TCXONC, 1);
1542 #endif
1543 #ifndef APOLLO
1544 #ifdef TIOCSTART
1545 if (!flow_control) ioctl (input_fd, TIOCSTART, 0);
1546 #endif
1547 #endif
1548
1549 #if defined (HAVE_TERMIOS) || defined (HPUX9)
1550 #ifdef TCOON
1551 if (!flow_control) tcflow (input_fd, TCOON);
1552 #endif
1553 #endif
1554
1555 #ifdef AIXHFT
1556 hft_init ();
1557 #ifdef IBMR2AIX
1558 {
1559 /* IBM's HFT device usually thinks a ^J should be LF/CR. We need it
1560 to be only LF. This is the way that is done. */
1561 struct termio tty;
1562
1563 if (ioctl (1, HFTGETID, &tty) != -1)
1564 write (1, "\033[20l", 5);
1565 }
1566 #endif
1567 #endif /* AIXHFT */
1568
1569 #ifdef VMS
1570 /* Appears to do nothing when in PASTHRU mode.
1571 SYS$QIOW (0, input_fd, IO$_SETMODE|IO$M_OUTBAND, 0, 0, 0,
1572 interrupt_signal, oob_chars, 0, 0, 0, 0);
1573 */
1574 queue_kbd_input (0);
1575 #endif /* VMS */
1576 }
1577
1578 #ifdef F_SETFL
1579 #ifndef F_SETOWN_BUG
1580 #ifdef F_GETOWN /* F_SETFL does not imply existence of F_GETOWN */
1581 if (interrupt_input
1582 && ! read_socket_hook && EQ (Vwindow_system, Qnil))
1583 {
1584 old_fcntl_owner = fcntl (input_fd, F_GETOWN, 0);
1585 fcntl (input_fd, F_SETOWN, getpid ());
1586 init_sigio (input_fd);
1587 }
1588 #endif /* F_GETOWN */
1589 #endif /* F_SETOWN_BUG */
1590 #endif /* F_SETFL */
1591
1592 #ifdef BSD4_1
1593 if (interrupt_input)
1594 init_sigio (input_fd);
1595 #endif
1596
1597 #ifdef VMS /* VMS sometimes has this symbol but lacks setvbuf. */
1598 #undef _IOFBF
1599 #endif
1600 #ifdef _IOFBF
1601 /* This symbol is defined on recent USG systems.
1602 Someone says without this call USG won't really buffer the file
1603 even with a call to setbuf. */
1604 setvbuf (stdout, (char *) _sobuf, _IOFBF, sizeof _sobuf);
1605 #else
1606 setbuf (stdout, (char *) _sobuf);
1607 #endif
1608 #ifdef HAVE_WINDOW_SYSTEM
1609 /* Emacs' window system on MSDOG uses the `internal terminal' and therefore
1610 needs the initialization code below. */
1611 if (EQ (Vwindow_system, Qnil)
1612 #ifndef WINDOWSNT
1613 /* When running in tty mode on NT/Win95, we have a read_socket
1614 hook, but still need the rest of the initialization code below. */
1615 && (! read_socket_hook)
1616 #endif
1617 )
1618 #endif
1619 set_terminal_modes ();
1620
1621 if (!term_initted
1622 && FRAMEP (Vterminal_frame)
1623 && FRAME_TERMCAP_P (XFRAME (Vterminal_frame)))
1624 init_frame_faces (XFRAME (Vterminal_frame));
1625
1626 if (term_initted && no_redraw_on_reenter)
1627 {
1628 if (display_completed)
1629 direct_output_forward_char (0);
1630 }
1631 else
1632 {
1633 frame_garbaged = 1;
1634 if (FRAMEP (Vterminal_frame))
1635 FRAME_GARBAGED_P (XFRAME (Vterminal_frame)) = 1;
1636 }
1637
1638 term_initted = 1;
1639 }
1640
1641 /* Return nonzero if safe to use tabs in output.
1642 At the time this is called, init_sys_modes has not been done yet. */
1643
1644 int
1645 tabs_safe_p ()
1646 {
1647 struct emacs_tty tty;
1648
1649 EMACS_GET_TTY (input_fd, &tty);
1650 return EMACS_TTY_TABS_OK (&tty);
1651 }
1652 \f
1653 /* Get terminal size from system.
1654 Store number of lines into *HEIGHTP and width into *WIDTHP.
1655 We store 0 if there's no valid information. */
1656
1657 void
1658 get_frame_size (widthp, heightp)
1659 int *widthp, *heightp;
1660 {
1661
1662 #ifdef TIOCGWINSZ
1663
1664 /* BSD-style. */
1665 struct winsize size;
1666
1667 if (ioctl (input_fd, TIOCGWINSZ, &size) == -1)
1668 *widthp = *heightp = 0;
1669 else
1670 {
1671 *widthp = size.ws_col;
1672 *heightp = size.ws_row;
1673 }
1674
1675 #else
1676 #ifdef TIOCGSIZE
1677
1678 /* SunOS - style. */
1679 struct ttysize size;
1680
1681 if (ioctl (input_fd, TIOCGSIZE, &size) == -1)
1682 *widthp = *heightp = 0;
1683 else
1684 {
1685 *widthp = size.ts_cols;
1686 *heightp = size.ts_lines;
1687 }
1688
1689 #else
1690 #ifdef VMS
1691
1692 struct sensemode tty;
1693
1694 SYS$QIOW (0, input_fd, IO$_SENSEMODE, &tty, 0, 0,
1695 &tty.class, 12, 0, 0, 0, 0);
1696 *widthp = tty.scr_wid;
1697 *heightp = tty.scr_len;
1698
1699 #else
1700 #ifdef MSDOS
1701 *widthp = ScreenCols ();
1702 *heightp = ScreenRows ();
1703 #else /* system doesn't know size */
1704 *widthp = 0;
1705 *heightp = 0;
1706 #endif
1707
1708 #endif /* not VMS */
1709 #endif /* not SunOS-style */
1710 #endif /* not BSD-style */
1711 }
1712
1713 /* Set the logical window size associated with descriptor FD
1714 to HEIGHT and WIDTH. This is used mainly with ptys. */
1715
1716 int
1717 set_window_size (fd, height, width)
1718 int fd, height, width;
1719 {
1720 #ifdef TIOCSWINSZ
1721
1722 /* BSD-style. */
1723 struct winsize size;
1724 size.ws_row = height;
1725 size.ws_col = width;
1726
1727 if (ioctl (fd, TIOCSWINSZ, &size) == -1)
1728 return 0; /* error */
1729 else
1730 return 1;
1731
1732 #else
1733 #ifdef TIOCSSIZE
1734
1735 /* SunOS - style. */
1736 struct ttysize size;
1737 size.ts_lines = height;
1738 size.ts_cols = width;
1739
1740 if (ioctl (fd, TIOCGSIZE, &size) == -1)
1741 return 0;
1742 else
1743 return 1;
1744 #else
1745 return -1;
1746 #endif /* not SunOS-style */
1747 #endif /* not BSD-style */
1748 }
1749
1750 \f
1751 /* Prepare the terminal for exiting Emacs; move the cursor to the
1752 bottom of the frame, turn off interrupt-driven I/O, etc. */
1753 void
1754 reset_sys_modes ()
1755 {
1756 struct frame *sf;
1757
1758 if (noninteractive)
1759 {
1760 fflush (stdout);
1761 return;
1762 }
1763 if (!term_initted)
1764 return;
1765 #ifdef HAVE_WINDOW_SYSTEM
1766 /* Emacs' window system on MSDOG uses the `internal terminal' and therefore
1767 needs the clean-up code below. */
1768 if (!EQ (Vwindow_system, Qnil)
1769 #ifndef WINDOWSNT
1770 /* When running in tty mode on NT/Win95, we have a read_socket
1771 hook, but still need the rest of the clean-up code below. */
1772 || read_socket_hook
1773 #endif
1774 )
1775 return;
1776 #endif
1777 sf = SELECTED_FRAME ();
1778 cursor_to (FRAME_HEIGHT (sf) - 1, 0);
1779 clear_end_of_line (FRAME_WIDTH (sf));
1780 /* clear_end_of_line may move the cursor */
1781 cursor_to (FRAME_HEIGHT (sf) - 1, 0);
1782 #if defined (IBMR2AIX) && defined (AIXHFT)
1783 {
1784 /* HFT devices normally use ^J as a LF/CR. We forced it to
1785 do the LF only. Now, we need to reset it. */
1786 struct termio tty;
1787
1788 if (ioctl (1, HFTGETID, &tty) != -1)
1789 write (1, "\033[20h", 5);
1790 }
1791 #endif
1792
1793 reset_terminal_modes ();
1794 fflush (stdout);
1795 #ifdef BSD_SYSTEM
1796 #ifndef BSD4_1
1797 /* Avoid possible loss of output when changing terminal modes. */
1798 fsync (fileno (stdout));
1799 #endif
1800 #endif
1801
1802 #ifdef F_SETFL
1803 #ifndef F_SETOWN_BUG
1804 #ifdef F_SETOWN /* F_SETFL does not imply existence of F_SETOWN */
1805 if (interrupt_input)
1806 {
1807 reset_sigio ();
1808 fcntl (input_fd, F_SETOWN, old_fcntl_owner);
1809 }
1810 #endif /* F_SETOWN */
1811 #endif /* F_SETOWN_BUG */
1812 #ifdef O_NDELAY
1813 fcntl (input_fd, F_SETFL, fcntl (input_fd, F_GETFL, 0) & ~O_NDELAY);
1814 #endif
1815 #endif /* F_SETFL */
1816 #ifdef BSD4_1
1817 if (interrupt_input)
1818 reset_sigio ();
1819 #endif /* BSD4_1 */
1820
1821 if (old_tty_valid)
1822 while (EMACS_SET_TTY (input_fd, &old_tty, 0) < 0 && errno == EINTR)
1823 ;
1824
1825 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */
1826 dos_ttcooked ();
1827 #endif
1828
1829 #ifdef SET_LINE_DISCIPLINE
1830 /* Ultrix's termios *ignores* any line discipline except TERMIODISC.
1831 A different old line discipline is therefore not restored, yet.
1832 Restore the old line discipline by hand. */
1833 ioctl (0, TIOCSETD, &old_tty.main.c_line);
1834 #endif
1835
1836 #ifdef AIXHFT
1837 hft_reset ();
1838 #endif
1839
1840 #ifdef BSD_PGRPS
1841 widen_foreground_group ();
1842 #endif
1843 }
1844 \f
1845 #ifdef HAVE_PTYS
1846
1847 /* Set up the proper status flags for use of a pty. */
1848
1849 void
1850 setup_pty (fd)
1851 int fd;
1852 {
1853 /* I'm told that TOICREMOTE does not mean control chars
1854 "can't be sent" but rather that they don't have
1855 input-editing or signaling effects.
1856 That should be good, because we have other ways
1857 to do those things in Emacs.
1858 However, telnet mode seems not to work on 4.2.
1859 So TIOCREMOTE is turned off now. */
1860
1861 /* Under hp-ux, if TIOCREMOTE is turned on, some calls
1862 will hang. In particular, the "timeout" feature (which
1863 causes a read to return if there is no data available)
1864 does this. Also it is known that telnet mode will hang
1865 in such a way that Emacs must be stopped (perhaps this
1866 is the same problem).
1867
1868 If TIOCREMOTE is turned off, then there is a bug in
1869 hp-ux which sometimes loses data. Apparently the
1870 code which blocks the master process when the internal
1871 buffer fills up does not work. Other than this,
1872 though, everything else seems to work fine.
1873
1874 Since the latter lossage is more benign, we may as well
1875 lose that way. -- cph */
1876 #ifdef FIONBIO
1877 #if defined(SYSV_PTYS) || defined(UNIX98_PTYS)
1878 {
1879 int on = 1;
1880 ioctl (fd, FIONBIO, &on);
1881 }
1882 #endif
1883 #endif
1884 #ifdef IBMRTAIX
1885 /* On AIX, the parent gets SIGHUP when a pty attached child dies. So, we */
1886 /* ignore SIGHUP once we've started a child on a pty. Note that this may */
1887 /* cause EMACS not to die when it should, i.e., when its own controlling */
1888 /* tty goes away. I've complained to the AIX developers, and they may */
1889 /* change this behavior, but I'm not going to hold my breath. */
1890 signal (SIGHUP, SIG_IGN);
1891 #endif
1892 }
1893 #endif /* HAVE_PTYS */
1894 \f
1895 #ifdef VMS
1896
1897 /* Assigning an input channel is done at the start of Emacs execution.
1898 This is called each time Emacs is resumed, also, but does nothing
1899 because input_chain is no longer zero. */
1900
1901 void
1902 init_vms_input ()
1903 {
1904 int status;
1905
1906 if (input_fd == 0)
1907 {
1908 status = SYS$ASSIGN (&input_dsc, &input_fd, 0, 0);
1909 if (! (status & 1))
1910 LIB$STOP (status);
1911 }
1912 }
1913
1914 /* Deassigning the input channel is done before exiting. */
1915
1916 void
1917 stop_vms_input ()
1918 {
1919 return SYS$DASSGN (input_fd);
1920 }
1921
1922 short input_buffer;
1923
1924 /* Request reading one character into the keyboard buffer.
1925 This is done as soon as the buffer becomes empty. */
1926
1927 void
1928 queue_kbd_input ()
1929 {
1930 int status;
1931 extern kbd_input_ast ();
1932
1933 waiting_for_ast = 0;
1934 stop_input = 0;
1935 status = SYS$QIO (0, input_fd, IO$_READVBLK,
1936 &input_iosb, kbd_input_ast, 1,
1937 &input_buffer, 1, 0, terminator_mask, 0, 0);
1938 }
1939
1940 int input_count;
1941
1942 /* Ast routine that is called when keyboard input comes in
1943 in accord with the SYS$QIO above. */
1944
1945 void
1946 kbd_input_ast ()
1947 {
1948 register int c = -1;
1949 int old_errno = errno;
1950 extern EMACS_TIME *input_available_clear_time;
1951
1952 if (waiting_for_ast)
1953 SYS$SETEF (input_ef);
1954 waiting_for_ast = 0;
1955 input_count++;
1956 #ifdef ASTDEBUG
1957 if (input_count == 25)
1958 exit (1);
1959 printf ("Ast # %d,", input_count);
1960 printf (" iosb = %x, %x, %x, %x",
1961 input_iosb.offset, input_iosb.status, input_iosb.termlen,
1962 input_iosb.term);
1963 #endif
1964 if (input_iosb.offset)
1965 {
1966 c = input_buffer;
1967 #ifdef ASTDEBUG
1968 printf (", char = 0%o", c);
1969 #endif
1970 }
1971 #ifdef ASTDEBUG
1972 printf ("\n");
1973 fflush (stdout);
1974 sleep (1);
1975 #endif
1976 if (! stop_input)
1977 queue_kbd_input ();
1978 if (c >= 0)
1979 {
1980 struct input_event e;
1981 e.kind = ascii_keystroke;
1982 XSETINT (e.code, c);
1983 e.frame_or_window = selected_frame;
1984 kbd_buffer_store_event (&e);
1985 }
1986 if (input_available_clear_time)
1987 EMACS_SET_SECS_USECS (*input_available_clear_time, 0, 0);
1988 errno = old_errno;
1989 }
1990
1991 /* Wait until there is something in kbd_buffer. */
1992
1993 void
1994 wait_for_kbd_input ()
1995 {
1996 extern int have_process_input, process_exited;
1997
1998 /* If already something, avoid doing system calls. */
1999 if (detect_input_pending ())
2000 {
2001 return;
2002 }
2003 /* Clear a flag, and tell ast routine above to set it. */
2004 SYS$CLREF (input_ef);
2005 waiting_for_ast = 1;
2006 /* Check for timing error: ast happened while we were doing that. */
2007 if (!detect_input_pending ())
2008 {
2009 /* No timing error: wait for flag to be set. */
2010 set_waiting_for_input (0);
2011 SYS$WFLOR (input_ef, input_eflist);
2012 clear_waiting_for_input (0);
2013 if (!detect_input_pending ())
2014 /* Check for subprocess input availability */
2015 {
2016 int dsp = have_process_input || process_exited;
2017
2018 SYS$CLREF (process_ef);
2019 if (have_process_input)
2020 process_command_input ();
2021 if (process_exited)
2022 process_exit ();
2023 if (dsp)
2024 {
2025 update_mode_lines++;
2026 prepare_menu_bars ();
2027 redisplay_preserve_echo_area ();
2028 }
2029 }
2030 }
2031 waiting_for_ast = 0;
2032 }
2033
2034 /* Get rid of any pending QIO, when we are about to suspend
2035 or when we want to throw away pending input.
2036 We wait for a positive sign that the AST routine has run
2037 and therefore there is no I/O request queued when we return.
2038 SYS$SETAST is used to avoid a timing error. */
2039
2040 void
2041 end_kbd_input ()
2042 {
2043 #ifdef ASTDEBUG
2044 printf ("At end_kbd_input.\n");
2045 fflush (stdout);
2046 sleep (1);
2047 #endif
2048 if (LIB$AST_IN_PROG ()) /* Don't wait if suspending from kbd_buffer_store_event! */
2049 {
2050 SYS$CANCEL (input_fd);
2051 return;
2052 }
2053
2054 SYS$SETAST (0);
2055 /* Clear a flag, and tell ast routine above to set it. */
2056 SYS$CLREF (input_ef);
2057 waiting_for_ast = 1;
2058 stop_input = 1;
2059 SYS$CANCEL (input_fd);
2060 SYS$SETAST (1);
2061 SYS$WAITFR (input_ef);
2062 waiting_for_ast = 0;
2063 }
2064
2065 /* Wait for either input available or time interval expiry. */
2066
2067 void
2068 input_wait_timeout (timeval)
2069 int timeval; /* Time to wait, in seconds */
2070 {
2071 int time [2];
2072 static int zero = 0;
2073 static int large = -10000000;
2074
2075 LIB$EMUL (&timeval, &large, &zero, time); /* Convert to VMS format */
2076
2077 /* If already something, avoid doing system calls. */
2078 if (detect_input_pending ())
2079 {
2080 return;
2081 }
2082 /* Clear a flag, and tell ast routine above to set it. */
2083 SYS$CLREF (input_ef);
2084 waiting_for_ast = 1;
2085 /* Check for timing error: ast happened while we were doing that. */
2086 if (!detect_input_pending ())
2087 {
2088 /* No timing error: wait for flag to be set. */
2089 SYS$CANTIM (1, 0);
2090 if (SYS$SETIMR (timer_ef, time, 0, 1) & 1) /* Set timer */
2091 SYS$WFLOR (timer_ef, timer_eflist); /* Wait for timer expiry or input */
2092 }
2093 waiting_for_ast = 0;
2094 }
2095
2096 /* The standard `sleep' routine works some other way
2097 and it stops working if you have ever quit out of it.
2098 This one continues to work. */
2099
2100 sys_sleep (timeval)
2101 int timeval;
2102 {
2103 int time [2];
2104 static int zero = 0;
2105 static int large = -10000000;
2106
2107 LIB$EMUL (&timeval, &large, &zero, time); /* Convert to VMS format */
2108
2109 SYS$CANTIM (1, 0);
2110 if (SYS$SETIMR (timer_ef, time, 0, 1) & 1) /* Set timer */
2111 SYS$WAITFR (timer_ef); /* Wait for timer expiry only */
2112 }
2113
2114 void
2115 init_sigio (fd)
2116 int fd;
2117 {
2118 request_sigio ();
2119 }
2120
2121 reset_sigio ()
2122 {
2123 unrequest_sigio ();
2124 }
2125
2126 void
2127 request_sigio ()
2128 {
2129 croak ("request sigio");
2130 }
2131
2132 void
2133 unrequest_sigio ()
2134 {
2135 croak ("unrequest sigio");
2136 }
2137
2138 #endif /* VMS */
2139 \f
2140 /* Note that VMS compiler won't accept defined (CANNOT_DUMP). */
2141 #ifndef CANNOT_DUMP
2142 #define NEED_STARTS
2143 #endif
2144
2145 #ifndef SYSTEM_MALLOC
2146 #ifndef NEED_STARTS
2147 #define NEED_STARTS
2148 #endif
2149 #endif
2150
2151 #ifdef NEED_STARTS
2152 /* Some systems that cannot dump also cannot implement these. */
2153
2154 /*
2155 * Return the address of the start of the text segment prior to
2156 * doing an unexec. After unexec the return value is undefined.
2157 * See crt0.c for further explanation and _start.
2158 *
2159 */
2160
2161 #if !(defined (__NetBSD__) && defined (__ELF__))
2162 #ifndef HAVE_TEXT_START
2163 char *
2164 start_of_text ()
2165 {
2166 #ifdef TEXT_START
2167 return ((char *) TEXT_START);
2168 #else
2169 #ifdef GOULD
2170 extern csrt ();
2171 return ((char *) csrt);
2172 #else /* not GOULD */
2173 extern int _start ();
2174 return ((char *) _start);
2175 #endif /* GOULD */
2176 #endif /* TEXT_START */
2177 }
2178 #endif /* not HAVE_TEXT_START */
2179 #endif
2180
2181 /*
2182 * Return the address of the start of the data segment prior to
2183 * doing an unexec. After unexec the return value is undefined.
2184 * See crt0.c for further information and definition of data_start.
2185 *
2186 * Apparently, on BSD systems this is etext at startup. On
2187 * USG systems (swapping) this is highly mmu dependent and
2188 * is also dependent on whether or not the program is running
2189 * with shared text. Generally there is a (possibly large)
2190 * gap between end of text and start of data with shared text.
2191 *
2192 * On Uniplus+ systems with shared text, data starts at a
2193 * fixed address. Each port (from a given oem) is generally
2194 * different, and the specific value of the start of data can
2195 * be obtained via the UniPlus+ specific "uvar" system call,
2196 * however the method outlined in crt0.c seems to be more portable.
2197 *
2198 * Probably what will have to happen when a USG unexec is available,
2199 * at least on UniPlus, is temacs will have to be made unshared so
2200 * that text and data are contiguous. Then once loadup is complete,
2201 * unexec will produce a shared executable where the data can be
2202 * at the normal shared text boundary and the startofdata variable
2203 * will be patched by unexec to the correct value.
2204 *
2205 */
2206
2207 char *
2208 start_of_data ()
2209 {
2210 #ifdef DATA_START
2211 return ((char *) DATA_START);
2212 #else
2213 #ifdef ORDINARY_LINK
2214 /*
2215 * This is a hack. Since we're not linking crt0.c or pre_crt0.c,
2216 * data_start isn't defined. We take the address of environ, which
2217 * is known to live at or near the start of the system crt0.c, and
2218 * we don't sweat the handful of bytes that might lose.
2219 */
2220 extern char **environ;
2221
2222 return ((char *) &environ);
2223 #else
2224 extern int data_start;
2225 return ((char *) &data_start);
2226 #endif /* ORDINARY_LINK */
2227 #endif /* DATA_START */
2228 }
2229 #endif /* NEED_STARTS (not CANNOT_DUMP or not SYSTEM_MALLOC) */
2230
2231 #ifndef CANNOT_DUMP
2232 /* Some systems that cannot dump also cannot implement these. */
2233
2234 /*
2235 * Return the address of the end of the text segment prior to
2236 * doing an unexec. After unexec the return value is undefined.
2237 */
2238
2239 char *
2240 end_of_text ()
2241 {
2242 #ifdef TEXT_END
2243 return ((char *) TEXT_END);
2244 #else
2245 extern int etext;
2246 return ((char *) &etext);
2247 #endif
2248 }
2249
2250 /*
2251 * Return the address of the end of the data segment prior to
2252 * doing an unexec. After unexec the return value is undefined.
2253 */
2254
2255 char *
2256 end_of_data ()
2257 {
2258 #ifdef DATA_END
2259 return ((char *) DATA_END);
2260 #else
2261 extern int edata;
2262 return ((char *) &edata);
2263 #endif
2264 }
2265
2266 #endif /* not CANNOT_DUMP */
2267 \f
2268 /* init_system_name sets up the string for the Lisp function
2269 system-name to return. */
2270
2271 #ifdef BSD4_1
2272 #include <whoami.h>
2273 #endif
2274
2275 extern Lisp_Object Vsystem_name;
2276
2277 #ifndef BSD4_1
2278 #ifndef VMS
2279 #ifdef HAVE_SOCKETS
2280 #include <sys/socket.h>
2281 #include <netdb.h>
2282 #endif /* HAVE_SOCKETS */
2283 #endif /* not VMS */
2284 #endif /* not BSD4_1 */
2285
2286 #ifdef TRY_AGAIN
2287 #ifndef HAVE_H_ERRNO
2288 extern int h_errno;
2289 #endif
2290 #endif /* TRY_AGAIN */
2291
2292 void
2293 init_system_name ()
2294 {
2295 #ifdef BSD4_1
2296 Vsystem_name = build_string (sysname);
2297 #else
2298 #ifdef VMS
2299 char *sp, *end;
2300 if ((sp = egetenv ("SYS$NODE")) == 0)
2301 Vsystem_name = build_string ("vax-vms");
2302 else if ((end = index (sp, ':')) == 0)
2303 Vsystem_name = build_string (sp);
2304 else
2305 Vsystem_name = make_string (sp, end - sp);
2306 #else
2307 #ifndef HAVE_GETHOSTNAME
2308 struct utsname uts;
2309 uname (&uts);
2310 Vsystem_name = build_string (uts.nodename);
2311 #else /* HAVE_GETHOSTNAME */
2312 unsigned int hostname_size = 256;
2313 char *hostname = (char *) alloca (hostname_size);
2314
2315 /* Try to get the host name; if the buffer is too short, try
2316 again. Apparently, the only indication gethostname gives of
2317 whether the buffer was large enough is the presence or absence
2318 of a '\0' in the string. Eech. */
2319 for (;;)
2320 {
2321 gethostname (hostname, hostname_size - 1);
2322 hostname[hostname_size - 1] = '\0';
2323
2324 /* Was the buffer large enough for the '\0'? */
2325 if (strlen (hostname) < hostname_size - 1)
2326 break;
2327
2328 hostname_size <<= 1;
2329 hostname = (char *) alloca (hostname_size);
2330 }
2331 #ifdef HAVE_SOCKETS
2332 /* Turn the hostname into the official, fully-qualified hostname.
2333 Don't do this if we're going to dump; this can confuse system
2334 libraries on some machines and make the dumped emacs core dump. */
2335 #ifndef CANNOT_DUMP
2336 if (initialized)
2337 #endif /* not CANNOT_DUMP */
2338 if (! index (hostname, '.'))
2339 {
2340 struct hostent *hp;
2341 int count;
2342 for (count = 0;; count++)
2343 {
2344 #ifdef TRY_AGAIN
2345 h_errno = 0;
2346 #endif
2347 hp = gethostbyname (hostname);
2348 #ifdef TRY_AGAIN
2349 if (! (hp == 0 && h_errno == TRY_AGAIN))
2350 #endif
2351 break;
2352 if (count >= 5)
2353 break;
2354 Fsleep_for (make_number (1), Qnil);
2355 }
2356 if (hp)
2357 {
2358 char *fqdn = (char *) hp->h_name;
2359 char *p;
2360
2361 if (!index (fqdn, '.'))
2362 {
2363 /* We still don't have a fully qualified domain name.
2364 Try to find one in the list of alternate names */
2365 char **alias = hp->h_aliases;
2366 while (*alias && !index (*alias, '.'))
2367 alias++;
2368 if (*alias)
2369 fqdn = *alias;
2370 }
2371 hostname = fqdn;
2372 #if 0
2373 /* Convert the host name to lower case. */
2374 /* Using ctype.h here would introduce a possible locale
2375 dependence that is probably wrong for hostnames. */
2376 p = hostname;
2377 while (*p)
2378 {
2379 if (*p >= 'A' && *p <= 'Z')
2380 *p += 'a' - 'A';
2381 p++;
2382 }
2383 #endif
2384 }
2385 }
2386 #endif /* HAVE_SOCKETS */
2387 /* We used to try using getdomainname here,
2388 but NIIBE Yutaka <gniibe@etl.go.jp> says that
2389 getdomainname gets the NIS/YP domain which often is not the same
2390 as in Internet domain name. */
2391 #if 0 /* Turned off because sysinfo is not really likely to return the
2392 correct Internet domain. */
2393 #if (HAVE_SYSINFO && defined (SI_SRPC_DOMAIN))
2394 if (! index (hostname, '.'))
2395 {
2396 /* The hostname is not fully qualified. Append the domain name. */
2397
2398 int hostlen = strlen (hostname);
2399 int domain_size = 256;
2400
2401 for (;;)
2402 {
2403 char *domain = (char *) alloca (domain_size + 1);
2404 char *fqdn = (char *) alloca (hostlen + 1 + domain_size + 1);
2405 int sys_domain_size = sysinfo (SI_SRPC_DOMAIN, domain, domain_size);
2406 if (sys_domain_size <= 0)
2407 break;
2408 if (domain_size < sys_domain_size)
2409 {
2410 domain_size = sys_domain_size;
2411 continue;
2412 }
2413 strcpy (fqdn, hostname);
2414 if (domain[0] == '.')
2415 strcpy (fqdn + hostlen, domain);
2416 else if (domain[0] != 0)
2417 {
2418 fqdn[hostlen] = '.';
2419 strcpy (fqdn + hostlen + 1, domain);
2420 }
2421 hostname = fqdn;
2422 break;
2423 }
2424 }
2425 #endif /* HAVE_SYSINFO && defined (SI_SRPC_DOMAIN) */
2426 #endif /* 0 */
2427 Vsystem_name = build_string (hostname);
2428 #endif /* HAVE_GETHOSTNAME */
2429 #endif /* VMS */
2430 #endif /* BSD4_1 */
2431 {
2432 unsigned char *p;
2433 for (p = XSTRING (Vsystem_name)->data; *p; p++)
2434 if (*p == ' ' || *p == '\t')
2435 *p = '-';
2436 }
2437 }
2438 \f
2439 #ifndef MSDOS
2440 #ifndef VMS
2441 #if !defined (HAVE_SELECT) || defined (BROKEN_SELECT_NON_X)
2442
2443 #include "sysselect.h"
2444 #undef select
2445
2446 #if defined (HAVE_X_WINDOWS) && !defined (HAVE_SELECT)
2447 /* Cause explanatory error message at compile time,
2448 since the select emulation is not good enough for X. */
2449 int *x = &x_windows_lose_if_no_select_system_call;
2450 #endif
2451
2452 /* Emulate as much as select as is possible under 4.1 and needed by Gnu Emacs
2453 * Only checks read descriptors.
2454 */
2455 /* How long to wait between checking fds in select */
2456 #define SELECT_PAUSE 1
2457 int select_alarmed;
2458
2459 /* For longjmp'ing back to read_input_waiting. */
2460
2461 jmp_buf read_alarm_throw;
2462
2463 /* Nonzero if the alarm signal should throw back to read_input_waiting.
2464 The read_socket_hook function sets this to 1 while it is waiting. */
2465
2466 int read_alarm_should_throw;
2467
2468 SIGTYPE
2469 select_alarm ()
2470 {
2471 select_alarmed = 1;
2472 #ifdef BSD4_1
2473 sigrelse (SIGALRM);
2474 #else /* not BSD4_1 */
2475 signal (SIGALRM, SIG_IGN);
2476 #endif /* not BSD4_1 */
2477 if (read_alarm_should_throw)
2478 longjmp (read_alarm_throw, 1);
2479 }
2480
2481 #ifndef WINDOWSNT
2482 /* Only rfds are checked. */
2483 int
2484 sys_select (nfds, rfds, wfds, efds, timeout)
2485 int nfds;
2486 SELECT_TYPE *rfds, *wfds, *efds;
2487 EMACS_TIME *timeout;
2488 {
2489 int ravail = 0;
2490 SELECT_TYPE orfds;
2491 int timeoutval;
2492 int *local_timeout;
2493 extern int proc_buffered_char[];
2494 #ifndef subprocesses
2495 int process_tick = 0, update_tick = 0;
2496 #else
2497 extern int process_tick, update_tick;
2498 #endif
2499 unsigned char buf;
2500
2501 #if defined (HAVE_SELECT) && defined (HAVE_X_WINDOWS)
2502 /* If we're using X, then the native select will work; we only need the
2503 emulation for non-X usage. */
2504 if (!NILP (Vwindow_system))
2505 return select (nfds, rfds, wfds, efds, timeout);
2506 #endif
2507 timeoutval = timeout ? EMACS_SECS (*timeout) : 100000;
2508 local_timeout = &timeoutval;
2509 FD_ZERO (&orfds);
2510 if (rfds)
2511 {
2512 orfds = *rfds;
2513 FD_ZERO (rfds);
2514 }
2515 if (wfds)
2516 FD_ZERO (wfds);
2517 if (efds)
2518 FD_ZERO (efds);
2519
2520 /* If we are looking only for the terminal, with no timeout,
2521 just read it and wait -- that's more efficient. */
2522 if (*local_timeout == 100000 && process_tick == update_tick
2523 && FD_ISSET (0, &orfds))
2524 {
2525 int fd;
2526 for (fd = 1; fd < nfds; ++fd)
2527 if (FD_ISSET (fd, &orfds))
2528 goto hardway;
2529 if (! detect_input_pending ())
2530 read_input_waiting ();
2531 FD_SET (0, rfds);
2532 return 1;
2533 }
2534
2535 hardway:
2536 /* Once a second, till the timer expires, check all the flagged read
2537 * descriptors to see if any input is available. If there is some then
2538 * set the corresponding bit in the return copy of rfds.
2539 */
2540 while (1)
2541 {
2542 register int to_check, fd;
2543
2544 if (rfds)
2545 {
2546 for (to_check = nfds, fd = 0; --to_check >= 0; fd++)
2547 {
2548 if (FD_ISSET (fd, &orfds))
2549 {
2550 int avail = 0, status = 0;
2551
2552 if (fd == 0)
2553 avail = detect_input_pending (); /* Special keyboard handler */
2554 else
2555 {
2556 #ifdef FIONREAD
2557 status = ioctl (fd, FIONREAD, &avail);
2558 #else /* no FIONREAD */
2559 /* Hoping it will return -1 if nothing available
2560 or 0 if all 0 chars requested are read. */
2561 if (proc_buffered_char[fd] >= 0)
2562 avail = 1;
2563 else
2564 {
2565 avail = read (fd, &buf, 1);
2566 if (avail > 0)
2567 proc_buffered_char[fd] = buf;
2568 }
2569 #endif /* no FIONREAD */
2570 }
2571 if (status >= 0 && avail > 0)
2572 {
2573 FD_SET (fd, rfds);
2574 ravail++;
2575 }
2576 }
2577 }
2578 }
2579 if (*local_timeout == 0 || ravail != 0 || process_tick != update_tick)
2580 break;
2581
2582 turn_on_atimers (0);
2583 signal (SIGALRM, select_alarm);
2584 select_alarmed = 0;
2585 alarm (SELECT_PAUSE);
2586
2587 /* Wait for a SIGALRM (or maybe a SIGTINT) */
2588 while (select_alarmed == 0 && *local_timeout != 0
2589 && process_tick == update_tick)
2590 {
2591 /* If we are interested in terminal input,
2592 wait by reading the terminal.
2593 That makes instant wakeup for terminal input at least. */
2594 if (FD_ISSET (0, &orfds))
2595 {
2596 read_input_waiting ();
2597 if (detect_input_pending ())
2598 select_alarmed = 1;
2599 }
2600 else
2601 pause ();
2602 }
2603 (*local_timeout) -= SELECT_PAUSE;
2604
2605 /* Reset the old alarm if there was one. */
2606 turn_on_atimers (1);
2607
2608 if (*local_timeout == 0) /* Stop on timer being cleared */
2609 break;
2610 }
2611 return ravail;
2612 }
2613 #endif /* not WINDOWSNT */
2614
2615 /* Read keyboard input into the standard buffer,
2616 waiting for at least one character. */
2617
2618 /* Make all keyboard buffers much bigger when using a window system. */
2619 #ifdef HAVE_WINDOW_SYSTEM
2620 #define BUFFER_SIZE_FACTOR 16
2621 #else
2622 #define BUFFER_SIZE_FACTOR 1
2623 #endif
2624
2625 void
2626 read_input_waiting ()
2627 {
2628 struct input_event e;
2629 int nread, i;
2630 extern int quit_char;
2631
2632 if (read_socket_hook)
2633 {
2634 struct input_event buf[256];
2635
2636 read_alarm_should_throw = 0;
2637 if (! setjmp (read_alarm_throw))
2638 nread = (*read_socket_hook) (0, buf, 256, 1);
2639 else
2640 nread = -1;
2641
2642 /* Scan the chars for C-g and store them in kbd_buffer. */
2643 for (i = 0; i < nread; i++)
2644 {
2645 kbd_buffer_store_event (&buf[i]);
2646 /* Don't look at input that follows a C-g too closely.
2647 This reduces lossage due to autorepeat on C-g. */
2648 if (buf[i].kind == ascii_keystroke
2649 && buf[i].code == quit_char)
2650 break;
2651 }
2652 }
2653 else
2654 {
2655 char buf[3];
2656 nread = read (fileno (stdin), buf, 1);
2657
2658 /* Scan the chars for C-g and store them in kbd_buffer. */
2659 e.kind = ascii_keystroke;
2660 e.frame_or_window = selected_frame;
2661 e.modifiers = 0;
2662 for (i = 0; i < nread; i++)
2663 {
2664 /* Convert chars > 0177 to meta events if desired.
2665 We do this under the same conditions that read_avail_input does. */
2666 if (read_socket_hook == 0)
2667 {
2668 /* If the user says she has a meta key, then believe her. */
2669 if (meta_key == 1 && (buf[i] & 0x80))
2670 e.modifiers = meta_modifier;
2671 if (meta_key != 2)
2672 buf[i] &= ~0x80;
2673 }
2674
2675 XSETINT (e.code, buf[i]);
2676 kbd_buffer_store_event (&e);
2677 /* Don't look at input that follows a C-g too closely.
2678 This reduces lossage due to autorepeat on C-g. */
2679 if (buf[i] == quit_char)
2680 break;
2681 }
2682 }
2683 }
2684
2685 #endif /* not HAVE_SELECT */
2686 #endif /* not VMS */
2687 #endif /* not MSDOS */
2688 \f
2689 #ifdef BSD4_1
2690 void
2691 init_sigio (fd)
2692 int fd;
2693 {
2694 if (noninteractive)
2695 return;
2696 lmode = LINTRUP | lmode;
2697 ioctl (fd, TIOCLSET, &lmode);
2698 }
2699
2700 void
2701 reset_sigio ()
2702 {
2703 if (noninteractive)
2704 return;
2705 lmode = ~LINTRUP & lmode;
2706 ioctl (0, TIOCLSET, &lmode);
2707 }
2708
2709 void
2710 request_sigio ()
2711 {
2712 sigrelse (SIGTINT);
2713
2714 interrupts_deferred = 0;
2715 }
2716
2717 void
2718 unrequest_sigio ()
2719 {
2720 sighold (SIGTINT);
2721
2722 interrupts_deferred = 1;
2723 }
2724
2725 /* still inside #ifdef BSD4_1 */
2726 #ifdef subprocesses
2727
2728 int sigheld; /* Mask of held signals */
2729
2730 void
2731 sigholdx (signum)
2732 int signum;
2733 {
2734 sigheld |= sigbit (signum);
2735 sighold (signum);
2736 }
2737
2738 void
2739 sigisheld (signum)
2740 int signum;
2741 {
2742 sigheld |= sigbit (signum);
2743 }
2744
2745 void
2746 sigunhold (signum)
2747 int signum;
2748 {
2749 sigheld &= ~sigbit (signum);
2750 sigrelse (signum);
2751 }
2752
2753 void
2754 sigfree () /* Free all held signals */
2755 {
2756 int i;
2757 for (i = 0; i < NSIG; i++)
2758 if (sigheld & sigbit (i))
2759 sigrelse (i);
2760 sigheld = 0;
2761 }
2762
2763 int
2764 sigbit (i)
2765 {
2766 return 1 << (i - 1);
2767 }
2768 #endif /* subprocesses */
2769 #endif /* BSD4_1 */
2770 \f
2771 /* POSIX signals support - DJB */
2772 /* Anyone with POSIX signals should have ANSI C declarations */
2773
2774 #ifdef POSIX_SIGNALS
2775
2776 sigset_t empty_mask, full_mask;
2777
2778 signal_handler_t
2779 sys_signal (int signal_number, signal_handler_t action)
2780 {
2781 struct sigaction new_action, old_action;
2782 sigemptyset (&new_action.sa_mask);
2783 new_action.sa_handler = action;
2784 #ifdef SA_RESTART
2785 /* Emacs mostly works better with restartable system services. If this
2786 * flag exists, we probably want to turn it on here.
2787 */
2788 new_action.sa_flags = SA_RESTART;
2789 #else
2790 new_action.sa_flags = 0;
2791 #endif
2792 sigaction (signal_number, &new_action, &old_action);
2793 return (old_action.sa_handler);
2794 }
2795
2796 #ifndef __GNUC__
2797 /* If we're compiling with GCC, we don't need this function, since it
2798 can be written as a macro. */
2799 sigset_t
2800 sys_sigmask (int sig)
2801 {
2802 sigset_t mask;
2803 sigemptyset (&mask);
2804 sigaddset (&mask, sig);
2805 return mask;
2806 }
2807 #endif
2808
2809 /* I'd like to have these guys return pointers to the mask storage in here,
2810 but there'd be trouble if the code was saving multiple masks. I'll be
2811 safe and pass the structure. It normally won't be more than 2 bytes
2812 anyhow. - DJB */
2813
2814 sigset_t
2815 sys_sigblock (sigset_t new_mask)
2816 {
2817 sigset_t old_mask;
2818 sigprocmask (SIG_BLOCK, &new_mask, &old_mask);
2819 return (old_mask);
2820 }
2821
2822 sigset_t
2823 sys_sigunblock (sigset_t new_mask)
2824 {
2825 sigset_t old_mask;
2826 sigprocmask (SIG_UNBLOCK, &new_mask, &old_mask);
2827 return (old_mask);
2828 }
2829
2830 sigset_t
2831 sys_sigsetmask (sigset_t new_mask)
2832 {
2833 sigset_t old_mask;
2834 sigprocmask (SIG_SETMASK, &new_mask, &old_mask);
2835 return (old_mask);
2836 }
2837
2838 #endif /* POSIX_SIGNALS */
2839 \f
2840 #if !defined HAVE_STRSIGNAL && !defined SYS_SIGLIST_DECLARED
2841 static char *my_sys_siglist[NSIG];
2842 # ifdef sys_siglist
2843 # undef sys_siglist
2844 # endif
2845 # define sys_siglist my_sys_siglist
2846 #endif
2847
2848 void
2849 init_signals ()
2850 {
2851 #ifdef POSIX_SIGNALS
2852 sigemptyset (&empty_mask);
2853 sigfillset (&full_mask);
2854 #endif
2855
2856 #if !defined HAVE_STRSIGNAL && !defined SYS_SIGLIST_DECLARED
2857 if (! initialized)
2858 {
2859 # ifdef SIGABRT
2860 sys_siglist[SIGABRT] = "Aborted";
2861 # endif
2862 # ifdef SIGAIO
2863 sys_siglist[SIGAIO] = "LAN I/O interrupt";
2864 # endif
2865 # ifdef SIGALRM
2866 sys_siglist[SIGALRM] = "Alarm clock";
2867 # endif
2868 # ifdef SIGBUS
2869 sys_siglist[SIGBUS] = "Bus error";
2870 # endif
2871 # ifdef SIGCLD
2872 sys_siglist[SIGCLD] = "Child status changed";
2873 # endif
2874 # ifdef SIGCHLD
2875 sys_siglist[SIGCHLD] = "Child status changed";
2876 # endif
2877 # ifdef SIGCONT
2878 sys_siglist[SIGCONT] = "Continued";
2879 # endif
2880 # ifdef SIGDANGER
2881 sys_siglist[SIGDANGER] = "Swap space dangerously low";
2882 # endif
2883 # ifdef SIGDGNOTIFY
2884 sys_siglist[SIGDGNOTIFY] = "Notification message in queue";
2885 # endif
2886 # ifdef SIGEMT
2887 sys_siglist[SIGEMT] = "Emulation trap";
2888 # endif
2889 # ifdef SIGFPE
2890 sys_siglist[SIGFPE] = "Arithmetic exception";
2891 # endif
2892 # ifdef SIGFREEZE
2893 sys_siglist[SIGFREEZE] = "SIGFREEZE";
2894 # endif
2895 # ifdef SIGGRANT
2896 sys_siglist[SIGGRANT] = "Monitor mode granted";
2897 # endif
2898 # ifdef SIGHUP
2899 sys_siglist[SIGHUP] = "Hangup";
2900 # endif
2901 # ifdef SIGILL
2902 sys_siglist[SIGILL] = "Illegal instruction";
2903 # endif
2904 # ifdef SIGINT
2905 sys_siglist[SIGINT] = "Interrupt";
2906 # endif
2907 # ifdef SIGIO
2908 sys_siglist[SIGIO] = "I/O possible";
2909 # endif
2910 # ifdef SIGIOINT
2911 sys_siglist[SIGIOINT] = "I/O intervention required";
2912 # endif
2913 # ifdef SIGIOT
2914 sys_siglist[SIGIOT] = "IOT trap";
2915 # endif
2916 # ifdef SIGKILL
2917 sys_siglist[SIGKILL] = "Killed";
2918 # endif
2919 # ifdef SIGLOST
2920 sys_siglist[SIGLOST] = "Resource lost";
2921 # endif
2922 # ifdef SIGLWP
2923 sys_siglist[SIGLWP] = "SIGLWP";
2924 # endif
2925 # ifdef SIGMSG
2926 sys_siglist[SIGMSG] = "Monitor mode data available";
2927 # endif
2928 # ifdef SIGPHONE
2929 sys_siglist[SIGWIND] = "SIGPHONE";
2930 # endif
2931 # ifdef SIGPIPE
2932 sys_siglist[SIGPIPE] = "Broken pipe";
2933 # endif
2934 # ifdef SIGPOLL
2935 sys_siglist[SIGPOLL] = "Pollable event occurred";
2936 # endif
2937 # ifdef SIGPROF
2938 sys_siglist[SIGPROF] = "Profiling timer expired";
2939 # endif
2940 # ifdef SIGPTY
2941 sys_siglist[SIGPTY] = "PTY I/O interrupt";
2942 # endif
2943 # ifdef SIGPWR
2944 sys_siglist[SIGPWR] = "Power-fail restart";
2945 # endif
2946 # ifdef SIGQUIT
2947 sys_siglist[SIGQUIT] = "Quit";
2948 # endif
2949 # ifdef SIGRETRACT
2950 sys_siglist[SIGRETRACT] = "Need to relinguish monitor mode";
2951 # endif
2952 # ifdef SIGSAK
2953 sys_siglist[SIGSAK] = "Secure attention";
2954 # endif
2955 # ifdef SIGSEGV
2956 sys_siglist[SIGSEGV] = "Segmentation violation";
2957 # endif
2958 # ifdef SIGSOUND
2959 sys_siglist[SIGSOUND] = "Sound completed";
2960 # endif
2961 # ifdef SIGSTOP
2962 sys_siglist[SIGSTOP] = "Stopped (signal)";
2963 # endif
2964 # ifdef SIGSTP
2965 sys_siglist[SIGSTP] = "Stopped (user)";
2966 # endif
2967 # ifdef SIGSYS
2968 sys_siglist[SIGSYS] = "Bad argument to system call";
2969 # endif
2970 # ifdef SIGTERM
2971 sys_siglist[SIGTERM] = "Terminated";
2972 # endif
2973 # ifdef SIGTHAW
2974 sys_siglist[SIGTHAW] = "SIGTHAW";
2975 # endif
2976 # ifdef SIGTRAP
2977 sys_siglist[SIGTRAP] = "Trace/breakpoint trap";
2978 # endif
2979 # ifdef SIGTSTP
2980 sys_siglist[SIGTSTP] = "Stopped (user)";
2981 # endif
2982 # ifdef SIGTTIN
2983 sys_siglist[SIGTTIN] = "Stopped (tty input)";
2984 # endif
2985 # ifdef SIGTTOU
2986 sys_siglist[SIGTTOU] = "Stopped (tty output)";
2987 # endif
2988 # ifdef SIGURG
2989 sys_siglist[SIGURG] = "Urgent I/O condition";
2990 # endif
2991 # ifdef SIGUSR1
2992 sys_siglist[SIGUSR1] = "User defined signal 1";
2993 # endif
2994 # ifdef SIGUSR2
2995 sys_siglist[SIGUSR2] = "User defined signal 2";
2996 # endif
2997 # ifdef SIGVTALRM
2998 sys_siglist[SIGVTALRM] = "Virtual timer expired";
2999 # endif
3000 # ifdef SIGWAITING
3001 sys_siglist[SIGWAITING] = "Process's LWPs are blocked";
3002 # endif
3003 # ifdef SIGWINCH
3004 sys_siglist[SIGWINCH] = "Window size changed";
3005 # endif
3006 # ifdef SIGWIND
3007 sys_siglist[SIGWIND] = "SIGWIND";
3008 # endif
3009 # ifdef SIGXCPU
3010 sys_siglist[SIGXCPU] = "CPU time limit exceeded";
3011 # endif
3012 # ifdef SIGXFSZ
3013 sys_siglist[SIGXFSZ] = "File size limit exceeded";
3014 # endif
3015 }
3016 #endif /* !defined HAVE_STRSIGNAL && !defined SYS_SIGLIST_DECLARED */
3017 }
3018 \f
3019 #ifndef HAVE_RANDOM
3020 #ifdef random
3021 #define HAVE_RANDOM
3022 #endif
3023 #endif
3024
3025 /* Figure out how many bits the system's random number generator uses.
3026 `random' and `lrand48' are assumed to return 31 usable bits.
3027 BSD `rand' returns a 31 bit value but the low order bits are unusable;
3028 so we'll shift it and treat it like the 15-bit USG `rand'. */
3029
3030 #ifndef RAND_BITS
3031 # ifdef HAVE_RANDOM
3032 # define RAND_BITS 31
3033 # else /* !HAVE_RANDOM */
3034 # ifdef HAVE_LRAND48
3035 # define RAND_BITS 31
3036 # define random lrand48
3037 # else /* !HAVE_LRAND48 */
3038 # define RAND_BITS 15
3039 # if RAND_MAX == 32767
3040 # define random rand
3041 # else /* RAND_MAX != 32767 */
3042 # if RAND_MAX == 2147483647
3043 # define random() (rand () >> 16)
3044 # else /* RAND_MAX != 2147483647 */
3045 # ifdef USG
3046 # define random rand
3047 # else
3048 # define random() (rand () >> 16)
3049 # endif /* !USG */
3050 # endif /* RAND_MAX != 2147483647 */
3051 # endif /* RAND_MAX != 32767 */
3052 # endif /* !HAVE_LRAND48 */
3053 # endif /* !HAVE_RANDOM */
3054 #endif /* !RAND_BITS */
3055
3056 void
3057 seed_random (arg)
3058 long arg;
3059 {
3060 #ifdef HAVE_RANDOM
3061 srandom ((unsigned int)arg);
3062 #else
3063 # ifdef HAVE_LRAND48
3064 srand48 (arg);
3065 # else
3066 srand ((unsigned int)arg);
3067 # endif
3068 #endif
3069 }
3070
3071 /*
3072 * Build a full Emacs-sized word out of whatever we've got.
3073 * This suffices even for a 64-bit architecture with a 15-bit rand.
3074 */
3075 long
3076 get_random ()
3077 {
3078 long val = random ();
3079 #if VALBITS > RAND_BITS
3080 val = (val << RAND_BITS) ^ random ();
3081 #if VALBITS > 2*RAND_BITS
3082 val = (val << RAND_BITS) ^ random ();
3083 #if VALBITS > 3*RAND_BITS
3084 val = (val << RAND_BITS) ^ random ();
3085 #if VALBITS > 4*RAND_BITS
3086 val = (val << RAND_BITS) ^ random ();
3087 #endif /* need at least 5 */
3088 #endif /* need at least 4 */
3089 #endif /* need at least 3 */
3090 #endif /* need at least 2 */
3091 return val & ((1L << VALBITS) - 1);
3092 }
3093 \f
3094 #ifdef WRONG_NAME_INSQUE
3095
3096 insque (q,p)
3097 caddr_t q,p;
3098 {
3099 _insque (q,p);
3100 }
3101
3102 #endif
3103 \f
3104 #ifdef VMS
3105
3106 #ifdef getenv
3107 /* If any place else asks for the TERM variable,
3108 allow it to be overridden with the EMACS_TERM variable
3109 before attempting to translate the logical name TERM. As a last
3110 resort, ask for VAX C's special idea of the TERM variable. */
3111 #undef getenv
3112 char *
3113 sys_getenv (name)
3114 char *name;
3115 {
3116 register char *val;
3117 static char buf[256];
3118 static struct dsc$descriptor_s equiv
3119 = {sizeof (buf), DSC$K_DTYPE_T, DSC$K_CLASS_S, buf};
3120 static struct dsc$descriptor_s d_name
3121 = {0, DSC$K_DTYPE_T, DSC$K_CLASS_S, 0};
3122 short eqlen;
3123
3124 if (!strcmp (name, "TERM"))
3125 {
3126 val = (char *) getenv ("EMACS_TERM");
3127 if (val)
3128 return val;
3129 }
3130
3131 d_name.dsc$w_length = strlen (name);
3132 d_name.dsc$a_pointer = name;
3133 if (LIB$SYS_TRNLOG (&d_name, &eqlen, &equiv) == 1)
3134 {
3135 char *str = (char *) xmalloc (eqlen + 1);
3136 bcopy (buf, str, eqlen);
3137 str[eqlen] = '\0';
3138 /* This is a storage leak, but a pain to fix. With luck,
3139 no one will ever notice. */
3140 return str;
3141 }
3142 return (char *) getenv (name);
3143 }
3144 #endif /* getenv */
3145
3146 #ifdef abort
3147 /* Since VMS doesn't believe in core dumps, the only way to debug this beast is
3148 to force a call on the debugger from within the image. */
3149 #undef abort
3150 sys_abort ()
3151 {
3152 reset_sys_modes ();
3153 LIB$SIGNAL (SS$_DEBUG);
3154 }
3155 #endif /* abort */
3156 #endif /* VMS */
3157 \f
3158 #ifdef VMS
3159 #ifdef LINK_CRTL_SHARE
3160 #ifdef SHARABLE_LIB_BUG
3161 /* Variables declared noshare and initialized in sharable libraries
3162 cannot be shared. The VMS linker incorrectly forces you to use a private
3163 version which is uninitialized... If not for this "feature", we
3164 could use the C library definition of sys_nerr and sys_errlist. */
3165 int sys_nerr = 35;
3166 char *sys_errlist[] =
3167 {
3168 "error 0",
3169 "not owner",
3170 "no such file or directory",
3171 "no such process",
3172 "interrupted system call",
3173 "i/o error",
3174 "no such device or address",
3175 "argument list too long",
3176 "exec format error",
3177 "bad file number",
3178 "no child process",
3179 "no more processes",
3180 "not enough memory",
3181 "permission denied",
3182 "bad address",
3183 "block device required",
3184 "mount devices busy",
3185 "file exists",
3186 "cross-device link",
3187 "no such device",
3188 "not a directory",
3189 "is a directory",
3190 "invalid argument",
3191 "file table overflow",
3192 "too many open files",
3193 "not a typewriter",
3194 "text file busy",
3195 "file too big",
3196 "no space left on device",
3197 "illegal seek",
3198 "read-only file system",
3199 "too many links",
3200 "broken pipe",
3201 "math argument",
3202 "result too large",
3203 "I/O stream empty",
3204 "vax/vms specific error code nontranslatable error"
3205 };
3206 #endif /* SHARABLE_LIB_BUG */
3207 #endif /* LINK_CRTL_SHARE */
3208 #endif /* VMS */
3209
3210 #ifndef HAVE_STRERROR
3211 #ifndef WINDOWSNT
3212 char *
3213 strerror (errnum)
3214 int errnum;
3215 {
3216 extern char *sys_errlist[];
3217 extern int sys_nerr;
3218
3219 if (errnum >= 0 && errnum < sys_nerr)
3220 return sys_errlist[errnum];
3221 return (char *) "Unknown error";
3222 }
3223 #endif /* not WINDOWSNT */
3224 #endif /* ! HAVE_STRERROR */
3225 \f
3226 int
3227 emacs_open (path, oflag, mode)
3228 char *path;
3229 int oflag, mode;
3230 {
3231 register int rtnval;
3232
3233 #ifdef BSD4_1
3234 if (oflag & O_CREAT)
3235 return creat (path, mode);
3236 #endif
3237
3238 while ((rtnval = open (path, oflag, mode)) == -1
3239 && (errno == EINTR));
3240 return (rtnval);
3241 }
3242
3243 int
3244 emacs_close (fd)
3245 int fd;
3246 {
3247 int did_retry = 0;
3248 register int rtnval;
3249
3250 while ((rtnval = close (fd)) == -1
3251 && (errno == EINTR))
3252 did_retry = 1;
3253
3254 /* If close is interrupted SunOS 4.1 may or may not have closed the
3255 file descriptor. If it did the second close will fail with
3256 errno = EBADF. That means we have succeeded. */
3257 if (rtnval == -1 && did_retry && errno == EBADF)
3258 return 0;
3259
3260 return rtnval;
3261 }
3262
3263 int
3264 emacs_read (fildes, buf, nbyte)
3265 int fildes;
3266 char *buf;
3267 unsigned int nbyte;
3268 {
3269 register int rtnval;
3270
3271 while ((rtnval = read (fildes, buf, nbyte)) == -1
3272 && (errno == EINTR));
3273 return (rtnval);
3274 }
3275
3276 int
3277 emacs_write (fildes, buf, nbyte)
3278 int fildes;
3279 char *buf;
3280 unsigned int nbyte;
3281 {
3282 register int rtnval, bytes_written;
3283
3284 bytes_written = 0;
3285
3286 while (nbyte > 0)
3287 {
3288 rtnval = write (fildes, buf, nbyte);
3289
3290 if (rtnval == -1)
3291 {
3292 if (errno == EINTR)
3293 continue;
3294 else
3295 return (bytes_written ? bytes_written : -1);
3296 }
3297
3298 buf += rtnval;
3299 nbyte -= rtnval;
3300 bytes_written += rtnval;
3301 }
3302 return (bytes_written);
3303 }
3304 \f
3305 #ifdef USG
3306 /*
3307 * All of the following are for USG.
3308 *
3309 * On USG systems the system calls are INTERRUPTIBLE by signals
3310 * that the user program has elected to catch. Thus the system call
3311 * must be retried in these cases. To handle this without massive
3312 * changes in the source code, we remap the standard system call names
3313 * to names for our own functions in sysdep.c that do the system call
3314 * with retries. Actually, for portability reasons, it is good
3315 * programming practice, as this example shows, to limit all actual
3316 * system calls to a single occurrence in the source. Sure, this
3317 * adds an extra level of function call overhead but it is almost
3318 * always negligible. Fred Fish, Unisoft Systems Inc.
3319 */
3320
3321 /*
3322 * Warning, this function may not duplicate 4.2 action properly
3323 * under error conditions.
3324 */
3325
3326 #ifndef MAXPATHLEN
3327 /* In 4.1, param.h fails to define this. */
3328 #define MAXPATHLEN 1024
3329 #endif
3330
3331 #ifndef HAVE_GETWD
3332
3333 char *
3334 getwd (pathname)
3335 char *pathname;
3336 {
3337 char *npath, *spath;
3338 extern char *getcwd ();
3339
3340 BLOCK_INPUT; /* getcwd uses malloc */
3341 spath = npath = getcwd ((char *) 0, MAXPATHLEN);
3342 if (spath == 0)
3343 return spath;
3344 /* On Altos 3068, getcwd can return @hostname/dir, so discard
3345 up to first slash. Should be harmless on other systems. */
3346 while (*npath && *npath != '/')
3347 npath++;
3348 strcpy (pathname, npath);
3349 free (spath); /* getcwd uses malloc */
3350 UNBLOCK_INPUT;
3351 return pathname;
3352 }
3353
3354 #endif /* HAVE_GETWD */
3355
3356 /*
3357 * Emulate rename using unlink/link. Note that this is
3358 * only partially correct. Also, doesn't enforce restriction
3359 * that files be of same type (regular->regular, dir->dir, etc).
3360 */
3361
3362 #ifndef HAVE_RENAME
3363
3364 rename (from, to)
3365 const char *from;
3366 const char *to;
3367 {
3368 if (access (from, 0) == 0)
3369 {
3370 unlink (to);
3371 if (link (from, to) == 0)
3372 if (unlink (from) == 0)
3373 return (0);
3374 }
3375 return (-1);
3376 }
3377
3378 #endif
3379
3380
3381 #ifdef HPUX
3382 #ifndef HAVE_PERROR
3383
3384 /* HPUX curses library references perror, but as far as we know
3385 it won't be called. Anyway this definition will do for now. */
3386
3387 perror ()
3388 {
3389 }
3390
3391 #endif /* not HAVE_PERROR */
3392 #endif /* HPUX */
3393
3394 #ifndef HAVE_DUP2
3395
3396 /*
3397 * Emulate BSD dup2. First close newd if it already exists.
3398 * Then, attempt to dup oldd. If not successful, call dup2 recursively
3399 * until we are, then close the unsuccessful ones.
3400 */
3401
3402 dup2 (oldd, newd)
3403 int oldd;
3404 int newd;
3405 {
3406 register int fd, ret;
3407
3408 emacs_close (newd);
3409
3410 #ifdef F_DUPFD
3411 return fcntl (oldd, F_DUPFD, newd);
3412 #else
3413 fd = dup (old);
3414 if (fd == -1)
3415 return -1;
3416 if (fd == new)
3417 return new;
3418 ret = dup2 (old,new);
3419 emacs_close (fd);
3420 return ret;
3421 #endif
3422 }
3423
3424 #endif /* not HAVE_DUP2 */
3425
3426 /*
3427 * Gettimeofday. Simulate as much as possible. Only accurate
3428 * to nearest second. Emacs doesn't use tzp so ignore it for now.
3429 * Only needed when subprocesses are defined.
3430 */
3431
3432 #ifdef subprocesses
3433 #ifndef VMS
3434 #ifndef HAVE_GETTIMEOFDAY
3435 #ifdef HAVE_TIMEVAL
3436
3437 /* ARGSUSED */
3438 int
3439 gettimeofday (tp, tzp)
3440 struct timeval *tp;
3441 struct timezone *tzp;
3442 {
3443 extern long time ();
3444
3445 tp->tv_sec = time ((long *)0);
3446 tp->tv_usec = 0;
3447 if (tzp != 0)
3448 tzp->tz_minuteswest = -1;
3449 return 0;
3450 }
3451
3452 #endif
3453 #endif
3454 #endif
3455 #endif /* subprocess && !HAVE_GETTIMEOFDAY && HAVE_TIMEVAL && !VMS */
3456
3457 /*
3458 * This function will go away as soon as all the stubs fixed. (fnf)
3459 */
3460
3461 void
3462 croak (badfunc)
3463 char *badfunc;
3464 {
3465 printf ("%s not yet implemented\r\n", badfunc);
3466 reset_sys_modes ();
3467 exit (1);
3468 }
3469
3470 #endif /* USG */
3471 \f
3472 /* Directory routines for systems that don't have them. */
3473
3474 #ifdef SYSV_SYSTEM_DIR
3475
3476 #include <dirent.h>
3477
3478 #if defined (BROKEN_CLOSEDIR) || !defined (HAVE_CLOSEDIR)
3479
3480 int
3481 closedir (dirp)
3482 register DIR *dirp; /* stream from opendir */
3483 {
3484 int rtnval;
3485
3486 rtnval = emacs_close (dirp->dd_fd);
3487
3488 /* Some systems (like Solaris) allocate the buffer and the DIR all
3489 in one block. Why in the world are we freeing this ourselves
3490 anyway? */
3491 #if ! (defined (sun) && defined (USG5_4))
3492 xfree ((char *) dirp->dd_buf); /* directory block defined in <dirent.h> */
3493 #endif
3494 xfree ((char *) dirp);
3495
3496 return rtnval;
3497 }
3498 #endif /* BROKEN_CLOSEDIR or not HAVE_CLOSEDIR */
3499 #endif /* SYSV_SYSTEM_DIR */
3500
3501 #ifdef NONSYSTEM_DIR_LIBRARY
3502
3503 DIR *
3504 opendir (filename)
3505 char *filename; /* name of directory */
3506 {
3507 register DIR *dirp; /* -> malloc'ed storage */
3508 register int fd; /* file descriptor for read */
3509 struct stat sbuf; /* result of fstat */
3510
3511 fd = emacs_open (filename, O_RDONLY, 0);
3512 if (fd < 0)
3513 return 0;
3514
3515 BLOCK_INPUT;
3516 if (fstat (fd, &sbuf) < 0
3517 || (sbuf.st_mode & S_IFMT) != S_IFDIR
3518 || (dirp = (DIR *) xmalloc (sizeof (DIR))) == 0)
3519 {
3520 emacs_close (fd);
3521 UNBLOCK_INPUT;
3522 return 0; /* bad luck today */
3523 }
3524 UNBLOCK_INPUT;
3525
3526 dirp->dd_fd = fd;
3527 dirp->dd_loc = dirp->dd_size = 0; /* refill needed */
3528
3529 return dirp;
3530 }
3531
3532 void
3533 closedir (dirp)
3534 register DIR *dirp; /* stream from opendir */
3535 {
3536 emacs_close (dirp->dd_fd);
3537 xfree ((char *) dirp);
3538 }
3539
3540
3541 #ifndef VMS
3542 #define DIRSIZ 14
3543 struct olddir
3544 {
3545 ino_t od_ino; /* inode */
3546 char od_name[DIRSIZ]; /* filename */
3547 };
3548 #endif /* not VMS */
3549
3550 struct direct dir_static; /* simulated directory contents */
3551
3552 /* ARGUSED */
3553 struct direct *
3554 readdir (dirp)
3555 register DIR *dirp; /* stream from opendir */
3556 {
3557 #ifndef VMS
3558 register struct olddir *dp; /* -> directory data */
3559 #else /* VMS */
3560 register struct dir$_name *dp; /* -> directory data */
3561 register struct dir$_version *dv; /* -> version data */
3562 #endif /* VMS */
3563
3564 for (; ;)
3565 {
3566 if (dirp->dd_loc >= dirp->dd_size)
3567 dirp->dd_loc = dirp->dd_size = 0;
3568
3569 if (dirp->dd_size == 0 /* refill buffer */
3570 && (dirp->dd_size = emacs_read (dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ)) <= 0)
3571 return 0;
3572
3573 #ifndef VMS
3574 dp = (struct olddir *) &dirp->dd_buf[dirp->dd_loc];
3575 dirp->dd_loc += sizeof (struct olddir);
3576
3577 if (dp->od_ino != 0) /* not deleted entry */
3578 {
3579 dir_static.d_ino = dp->od_ino;
3580 strncpy (dir_static.d_name, dp->od_name, DIRSIZ);
3581 dir_static.d_name[DIRSIZ] = '\0';
3582 dir_static.d_namlen = strlen (dir_static.d_name);
3583 dir_static.d_reclen = sizeof (struct direct)
3584 - MAXNAMLEN + 3
3585 + dir_static.d_namlen - dir_static.d_namlen % 4;
3586 return &dir_static; /* -> simulated structure */
3587 }
3588 #else /* VMS */
3589 dp = (struct dir$_name *) dirp->dd_buf;
3590 if (dirp->dd_loc == 0)
3591 dirp->dd_loc = (dp->dir$b_namecount&1) ? dp->dir$b_namecount + 1
3592 : dp->dir$b_namecount;
3593 dv = (struct dir$_version *)&dp->dir$t_name[dirp->dd_loc];
3594 dir_static.d_ino = dv->dir$w_fid_num;
3595 dir_static.d_namlen = dp->dir$b_namecount;
3596 dir_static.d_reclen = sizeof (struct direct)
3597 - MAXNAMLEN + 3
3598 + dir_static.d_namlen - dir_static.d_namlen % 4;
3599 strncpy (dir_static.d_name, dp->dir$t_name, dp->dir$b_namecount);
3600 dir_static.d_name[dir_static.d_namlen] = '\0';
3601 dirp->dd_loc = dirp->dd_size; /* only one record at a time */
3602 return &dir_static;
3603 #endif /* VMS */
3604 }
3605 }
3606
3607 #ifdef VMS
3608 /* readdirver is just like readdir except it returns all versions of a file
3609 as separate entries. */
3610
3611 /* ARGUSED */
3612 struct direct *
3613 readdirver (dirp)
3614 register DIR *dirp; /* stream from opendir */
3615 {
3616 register struct dir$_name *dp; /* -> directory data */
3617 register struct dir$_version *dv; /* -> version data */
3618
3619 if (dirp->dd_loc >= dirp->dd_size - sizeof (struct dir$_name))
3620 dirp->dd_loc = dirp->dd_size = 0;
3621
3622 if (dirp->dd_size == 0 /* refill buffer */
3623 && (dirp->dd_size = sys_read (dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ)) <= 0)
3624 return 0;
3625
3626 dp = (struct dir$_name *) dirp->dd_buf;
3627 if (dirp->dd_loc == 0)
3628 dirp->dd_loc = (dp->dir$b_namecount & 1) ? dp->dir$b_namecount + 1
3629 : dp->dir$b_namecount;
3630 dv = (struct dir$_version *) &dp->dir$t_name[dirp->dd_loc];
3631 strncpy (dir_static.d_name, dp->dir$t_name, dp->dir$b_namecount);
3632 sprintf (&dir_static.d_name[dp->dir$b_namecount], ";%d", dv->dir$w_version);
3633 dir_static.d_namlen = strlen (dir_static.d_name);
3634 dir_static.d_ino = dv->dir$w_fid_num;
3635 dir_static.d_reclen = sizeof (struct direct) - MAXNAMLEN + 3
3636 + dir_static.d_namlen - dir_static.d_namlen % 4;
3637 dirp->dd_loc = ((char *) (++dv) - dp->dir$t_name);
3638 return &dir_static;
3639 }
3640
3641 #endif /* VMS */
3642
3643 #endif /* NONSYSTEM_DIR_LIBRARY */
3644
3645 \f
3646 int
3647 set_file_times (filename, atime, mtime)
3648 char *filename;
3649 EMACS_TIME atime, mtime;
3650 {
3651 #ifdef HAVE_UTIMES
3652 struct timeval tv[2];
3653 tv[0] = atime;
3654 tv[1] = mtime;
3655 return utimes (filename, tv);
3656 #else /* not HAVE_UTIMES */
3657 struct utimbuf utb;
3658 utb.actime = EMACS_SECS (atime);
3659 utb.modtime = EMACS_SECS (mtime);
3660 return utime (filename, &utb);
3661 #endif /* not HAVE_UTIMES */
3662 }
3663 \f
3664 /* mkdir and rmdir functions, for systems which don't have them. */
3665
3666 #ifndef HAVE_MKDIR
3667 /*
3668 * Written by Robert Rother, Mariah Corporation, August 1985.
3669 *
3670 * If you want it, it's yours. All I ask in return is that if you
3671 * figure out how to do this in a Bourne Shell script you send me
3672 * a copy.
3673 * sdcsvax!rmr or rmr@uscd
3674 *
3675 * Severely hacked over by John Gilmore to make a 4.2BSD compatible
3676 * subroutine. 11Mar86; hoptoad!gnu
3677 *
3678 * Modified by rmtodd@uokmax 6-28-87 -- when making an already existing dir,
3679 * subroutine didn't return EEXIST. It does now.
3680 */
3681
3682 /*
3683 * Make a directory.
3684 */
3685 #ifdef MKDIR_PROTOTYPE
3686 MKDIR_PROTOTYPE
3687 #else
3688 int
3689 mkdir (dpath, dmode)
3690 char *dpath;
3691 int dmode;
3692 #endif
3693 {
3694 int cpid, status, fd;
3695 struct stat statbuf;
3696
3697 if (stat (dpath, &statbuf) == 0)
3698 {
3699 errno = EEXIST; /* Stat worked, so it already exists */
3700 return -1;
3701 }
3702
3703 /* If stat fails for a reason other than non-existence, return error */
3704 if (errno != ENOENT)
3705 return -1;
3706
3707 synch_process_alive = 1;
3708 switch (cpid = fork ())
3709 {
3710
3711 case -1: /* Error in fork */
3712 return (-1); /* Errno is set already */
3713
3714 case 0: /* Child process */
3715 /*
3716 * Cheap hack to set mode of new directory. Since this
3717 * child process is going away anyway, we zap its umask.
3718 * FIXME, this won't suffice to set SUID, SGID, etc. on this
3719 * directory. Does anybody care?
3720 */
3721 status = umask (0); /* Get current umask */
3722 status = umask (status | (0777 & ~dmode)); /* Set for mkdir */
3723 fd = emacs_open ("/dev/null", O_RDWR, 0);
3724 if (fd >= 0)
3725 {
3726 dup2 (fd, 0);
3727 dup2 (fd, 1);
3728 dup2 (fd, 2);
3729 }
3730 execl ("/bin/mkdir", "mkdir", dpath, (char *) 0);
3731 _exit (-1); /* Can't exec /bin/mkdir */
3732
3733 default: /* Parent process */
3734 wait_for_termination (cpid);
3735 }
3736
3737 if (synch_process_death != 0 || synch_process_retcode != 0)
3738 {
3739 errno = EIO; /* We don't know why, but */
3740 return -1; /* /bin/mkdir failed */
3741 }
3742
3743 return 0;
3744 }
3745 #endif /* not HAVE_MKDIR */
3746
3747 #ifndef HAVE_RMDIR
3748 int
3749 rmdir (dpath)
3750 char *dpath;
3751 {
3752 int cpid, status, fd;
3753 struct stat statbuf;
3754
3755 if (stat (dpath, &statbuf) != 0)
3756 {
3757 /* Stat just set errno. We don't have to */
3758 return -1;
3759 }
3760
3761 synch_process_alive = 1;
3762 switch (cpid = fork ())
3763 {
3764
3765 case -1: /* Error in fork */
3766 return (-1); /* Errno is set already */
3767
3768 case 0: /* Child process */
3769 fd = emacs_open ("/dev/null", O_RDWR, 0);
3770 if (fd >= 0)
3771 {
3772 dup2 (fd, 0);
3773 dup2 (fd, 1);
3774 dup2 (fd, 2);
3775 }
3776 execl ("/bin/rmdir", "rmdir", dpath, (char *) 0);
3777 _exit (-1); /* Can't exec /bin/rmdir */
3778
3779 default: /* Parent process */
3780 wait_for_termination (cpid);
3781 }
3782
3783 if (synch_process_death != 0 || synch_process_retcode != 0)
3784 {
3785 errno = EIO; /* We don't know why, but */
3786 return -1; /* /bin/rmdir failed */
3787 }
3788
3789 return 0;
3790 }
3791 #endif /* !HAVE_RMDIR */
3792
3793
3794 \f
3795 /* Functions for VMS */
3796 #ifdef VMS
3797 #include "vms-pwd.h"
3798 #include <acldef.h>
3799 #include <chpdef.h>
3800 #include <jpidef.h>
3801
3802 /* Return as a string the VMS error string pertaining to STATUS.
3803 Reuses the same static buffer each time it is called. */
3804
3805 char *
3806 vmserrstr (status)
3807 int status; /* VMS status code */
3808 {
3809 int bufadr[2];
3810 short len;
3811 static char buf[257];
3812
3813 bufadr[0] = sizeof buf - 1;
3814 bufadr[1] = (int) buf;
3815 if (! (SYS$GETMSG (status, &len, bufadr, 0x1, 0) & 1))
3816 return "untranslatable VMS error status";
3817 buf[len] = '\0';
3818 return buf;
3819 }
3820
3821 #ifdef access
3822 #undef access
3823
3824 /* The following is necessary because 'access' emulation by VMS C (2.0) does
3825 * not work correctly. (It also doesn't work well in version 2.3.)
3826 */
3827
3828 #ifdef VMS4_4
3829
3830 #define DESCRIPTOR(name,string) struct dsc$descriptor_s name = \
3831 { strlen (string), DSC$K_DTYPE_T, DSC$K_CLASS_S, string }
3832
3833 typedef union {
3834 struct {
3835 unsigned short s_buflen;
3836 unsigned short s_code;
3837 char *s_bufadr;
3838 unsigned short *s_retlenadr;
3839 } s;
3840 int end;
3841 } item;
3842 #define buflen s.s_buflen
3843 #define code s.s_code
3844 #define bufadr s.s_bufadr
3845 #define retlenadr s.s_retlenadr
3846
3847 #define R_OK 4 /* test for read permission */
3848 #define W_OK 2 /* test for write permission */
3849 #define X_OK 1 /* test for execute (search) permission */
3850 #define F_OK 0 /* test for presence of file */
3851
3852 int
3853 sys_access (path, mode)
3854 char *path;
3855 int mode;
3856 {
3857 static char *user = NULL;
3858 char dir_fn[512];
3859
3860 /* translate possible directory spec into .DIR file name, so brain-dead
3861 * access can treat the directory like a file. */
3862 if (directory_file_name (path, dir_fn))
3863 path = dir_fn;
3864
3865 if (mode == F_OK)
3866 return access (path, mode);
3867 if (user == NULL && (user = (char *) getenv ("USER")) == NULL)
3868 return -1;
3869 {
3870 int stat;
3871 int flags;
3872 int acces;
3873 unsigned short int dummy;
3874 item itemlst[3];
3875 static int constant = ACL$C_FILE;
3876 DESCRIPTOR (path_desc, path);
3877 DESCRIPTOR (user_desc, user);
3878
3879 flags = 0;
3880 acces = 0;
3881 if ((mode & X_OK) && ((stat = access (path, mode)) < 0 || mode == X_OK))
3882 return stat;
3883 if (mode & R_OK)
3884 acces |= CHP$M_READ;
3885 if (mode & W_OK)
3886 acces |= CHP$M_WRITE;
3887 itemlst[0].buflen = sizeof (int);
3888 itemlst[0].code = CHP$_FLAGS;
3889 itemlst[0].bufadr = (char *) &flags;
3890 itemlst[0].retlenadr = &dummy;
3891 itemlst[1].buflen = sizeof (int);
3892 itemlst[1].code = CHP$_ACCESS;
3893 itemlst[1].bufadr = (char *) &acces;
3894 itemlst[1].retlenadr = &dummy;
3895 itemlst[2].end = CHP$_END;
3896 stat = SYS$CHECK_ACCESS (&constant, &path_desc, &user_desc, itemlst);
3897 return stat == SS$_NORMAL ? 0 : -1;
3898 }
3899 }
3900
3901 #else /* not VMS4_4 */
3902
3903 #include <prvdef.h>
3904 #define ACE$M_WRITE 2
3905 #define ACE$C_KEYID 1
3906
3907 static unsigned short memid, grpid;
3908 static unsigned int uic;
3909
3910 /* Called from init_sys_modes, so it happens not very often
3911 but at least each time Emacs is loaded. */
3912 void
3913 sys_access_reinit ()
3914 {
3915 uic = 0;
3916 }
3917
3918 int
3919 sys_access (filename, type)
3920 char * filename;
3921 int type;
3922 {
3923 struct FAB fab;
3924 struct XABPRO xab;
3925 int status, size, i, typecode, acl_controlled;
3926 unsigned int *aclptr, *aclend, aclbuf[60];
3927 union prvdef prvmask;
3928
3929 /* Get UIC and GRP values for protection checking. */
3930 if (uic == 0)
3931 {
3932 status = LIB$GETJPI (&JPI$_UIC, 0, 0, &uic, 0, 0);
3933 if (! (status & 1))
3934 return -1;
3935 memid = uic & 0xFFFF;
3936 grpid = uic >> 16;
3937 }
3938
3939 if (type != 2) /* not checking write access */
3940 return access (filename, type);
3941
3942 /* Check write protection. */
3943
3944 #define CHECKPRIV(bit) (prvmask.bit)
3945 #define WRITABLE(field) (! ((xab.xab$w_pro >> field) & XAB$M_NOWRITE))
3946
3947 /* Find privilege bits */
3948 status = SYS$SETPRV (0, 0, 0, prvmask);
3949 if (! (status & 1))
3950 error ("Unable to find privileges: %s", vmserrstr (status));
3951 if (CHECKPRIV (PRV$V_BYPASS))
3952 return 0; /* BYPASS enabled */
3953 fab = cc$rms_fab;
3954 fab.fab$b_fac = FAB$M_GET;
3955 fab.fab$l_fna = filename;
3956 fab.fab$b_fns = strlen (filename);
3957 fab.fab$l_xab = &xab;
3958 xab = cc$rms_xabpro;
3959 xab.xab$l_aclbuf = aclbuf;
3960 xab.xab$w_aclsiz = sizeof (aclbuf);
3961 status = SYS$OPEN (&fab, 0, 0);
3962 if (! (status & 1))
3963 return -1;
3964 SYS$CLOSE (&fab, 0, 0);
3965 /* Check system access */
3966 if (CHECKPRIV (PRV$V_SYSPRV) && WRITABLE (XAB$V_SYS))
3967 return 0;
3968 /* Check ACL entries, if any */
3969 acl_controlled = 0;
3970 if (xab.xab$w_acllen > 0)
3971 {
3972 aclptr = aclbuf;
3973 aclend = &aclbuf[xab.xab$w_acllen / 4];
3974 while (*aclptr && aclptr < aclend)
3975 {
3976 size = (*aclptr & 0xff) / 4;
3977 typecode = (*aclptr >> 8) & 0xff;
3978 if (typecode == ACE$C_KEYID)
3979 for (i = size - 1; i > 1; i--)
3980 if (aclptr[i] == uic)
3981 {
3982 acl_controlled = 1;
3983 if (aclptr[1] & ACE$M_WRITE)
3984 return 0; /* Write access through ACL */
3985 }
3986 aclptr = &aclptr[size];
3987 }
3988 if (acl_controlled) /* ACL specified, prohibits write access */
3989 return -1;
3990 }
3991 /* No ACL entries specified, check normal protection */
3992 if (WRITABLE (XAB$V_WLD)) /* World writable */
3993 return 0;
3994 if (WRITABLE (XAB$V_GRP) &&
3995 (unsigned short) (xab.xab$l_uic >> 16) == grpid)
3996 return 0; /* Group writable */
3997 if (WRITABLE (XAB$V_OWN) &&
3998 (xab.xab$l_uic & 0xFFFF) == memid)
3999 return 0; /* Owner writable */
4000
4001 return -1; /* Not writable */
4002 }
4003 #endif /* not VMS4_4 */
4004 #endif /* access */
4005
4006 static char vtbuf[NAM$C_MAXRSS+1];
4007
4008 /* translate a vms file spec to a unix path */
4009 char *
4010 sys_translate_vms (vfile)
4011 char * vfile;
4012 {
4013 char * p;
4014 char * targ;
4015
4016 if (!vfile)
4017 return 0;
4018
4019 targ = vtbuf;
4020
4021 /* leading device or logical name is a root directory */
4022 if (p = strchr (vfile, ':'))
4023 {
4024 *targ++ = '/';
4025 while (vfile < p)
4026 *targ++ = *vfile++;
4027 vfile++;
4028 *targ++ = '/';
4029 }
4030 p = vfile;
4031 if (*p == '[' || *p == '<')
4032 {
4033 while (*++vfile != *p + 2)
4034 switch (*vfile)
4035 {
4036 case '.':
4037 if (vfile[-1] == *p)
4038 *targ++ = '.';
4039 *targ++ = '/';
4040 break;
4041
4042 case '-':
4043 *targ++ = '.';
4044 *targ++ = '.';
4045 break;
4046
4047 default:
4048 *targ++ = *vfile;
4049 break;
4050 }
4051 vfile++;
4052 *targ++ = '/';
4053 }
4054 while (*vfile)
4055 *targ++ = *vfile++;
4056
4057 return vtbuf;
4058 }
4059
4060 static char utbuf[NAM$C_MAXRSS+1];
4061
4062 /* translate a unix path to a VMS file spec */
4063 char *
4064 sys_translate_unix (ufile)
4065 char * ufile;
4066 {
4067 int slash_seen = 0;
4068 char *p;
4069 char * targ;
4070
4071 if (!ufile)
4072 return 0;
4073
4074 targ = utbuf;
4075
4076 if (*ufile == '/')
4077 {
4078 ufile++;
4079 }
4080
4081 while (*ufile)
4082 {
4083 switch (*ufile)
4084 {
4085 case '/':
4086 if (slash_seen)
4087 if (index (&ufile[1], '/'))
4088 *targ++ = '.';
4089 else
4090 *targ++ = ']';
4091 else
4092 {
4093 *targ++ = ':';
4094 if (index (&ufile[1], '/'))
4095 *targ++ = '[';
4096 slash_seen = 1;
4097 }
4098 break;
4099
4100 case '.':
4101 if (strncmp (ufile, "./", 2) == 0)
4102 {
4103 if (!slash_seen)
4104 {
4105 *targ++ = '[';
4106 slash_seen = 1;
4107 }
4108 ufile++; /* skip the dot */
4109 if (index (&ufile[1], '/'))
4110 *targ++ = '.';
4111 else
4112 *targ++ = ']';
4113 }
4114 else if (strncmp (ufile, "../", 3) == 0)
4115 {
4116 if (!slash_seen)
4117 {
4118 *targ++ = '[';
4119 slash_seen = 1;
4120 }
4121 *targ++ = '-';
4122 ufile += 2; /* skip the dots */
4123 if (index (&ufile[1], '/'))
4124 *targ++ = '.';
4125 else
4126 *targ++ = ']';
4127 }
4128 else
4129 *targ++ = *ufile;
4130 break;
4131
4132 default:
4133 *targ++ = *ufile;
4134 break;
4135 }
4136 ufile++;
4137 }
4138 *targ = '\0';
4139
4140 return utbuf;
4141 }
4142
4143 char *
4144 getwd (pathname)
4145 char *pathname;
4146 {
4147 char *ptr, *val;
4148 extern char *getcwd ();
4149
4150 #define MAXPATHLEN 1024
4151
4152 ptr = xmalloc (MAXPATHLEN);
4153 val = getcwd (ptr, MAXPATHLEN);
4154 if (val == 0)
4155 {
4156 xfree (ptr);
4157 return val;
4158 }
4159 strcpy (pathname, ptr);
4160 xfree (ptr);
4161
4162 return pathname;
4163 }
4164
4165 int
4166 getppid ()
4167 {
4168 long item_code = JPI$_OWNER;
4169 unsigned long parent_id;
4170 int status;
4171
4172 if (((status = LIB$GETJPI (&item_code, 0, 0, &parent_id)) & 1) == 0)
4173 {
4174 errno = EVMSERR;
4175 vaxc$errno = status;
4176 return -1;
4177 }
4178 return parent_id;
4179 }
4180
4181 #undef getuid
4182 unsigned
4183 sys_getuid ()
4184 {
4185 return (getgid () << 16) | getuid ();
4186 }
4187
4188 #undef read
4189 int
4190 sys_read (fildes, buf, nbyte)
4191 int fildes;
4192 char *buf;
4193 unsigned int nbyte;
4194 {
4195 return read (fildes, buf, (nbyte < MAXIOSIZE ? nbyte : MAXIOSIZE));
4196 }
4197
4198 #if 0
4199 int
4200 sys_write (fildes, buf, nbyte)
4201 int fildes;
4202 char *buf;
4203 unsigned int nbyte;
4204 {
4205 register int nwrote, rtnval = 0;
4206
4207 while (nbyte > MAXIOSIZE && (nwrote = write (fildes, buf, MAXIOSIZE)) > 0) {
4208 nbyte -= nwrote;
4209 buf += nwrote;
4210 rtnval += nwrote;
4211 }
4212 if (nwrote < 0)
4213 return rtnval ? rtnval : -1;
4214 if ((nwrote = write (fildes, buf, nbyte)) < 0)
4215 return rtnval ? rtnval : -1;
4216 return (rtnval + nwrote);
4217 }
4218 #endif /* 0 */
4219
4220 /*
4221 * VAX/VMS VAX C RTL really loses. It insists that records
4222 * end with a newline (carriage return) character, and if they
4223 * don't it adds one (nice of it isn't it!)
4224 *
4225 * Thus we do this stupidity below.
4226 */
4227
4228 #undef write
4229 int
4230 sys_write (fildes, buf, nbytes)
4231 int fildes;
4232 char *buf;
4233 unsigned int nbytes;
4234 {
4235 register char *p;
4236 register char *e;
4237 int sum = 0;
4238 struct stat st;
4239
4240 fstat (fildes, &st);
4241 p = buf;
4242 while (nbytes > 0)
4243 {
4244 int len, retval;
4245
4246 /* Handle fixed-length files with carriage control. */
4247 if (st.st_fab_rfm == FAB$C_FIX
4248 && ((st.st_fab_rat & (FAB$M_FTN | FAB$M_CR)) != 0))
4249 {
4250 len = st.st_fab_mrs;
4251 retval = write (fildes, p, min (len, nbytes));
4252 if (retval != len)
4253 return -1;
4254 retval++; /* This skips the implied carriage control */
4255 }
4256 else
4257 {
4258 e = p + min (MAXIOSIZE, nbytes) - 1;
4259 while (*e != '\n' && e > p) e--;
4260 if (p == e) /* Ok.. so here we add a newline... sigh. */
4261 e = p + min (MAXIOSIZE, nbytes) - 1;
4262 len = e + 1 - p;
4263 retval = write (fildes, p, len);
4264 if (retval != len)
4265 return -1;
4266 }
4267 p += retval;
4268 sum += retval;
4269 nbytes -= retval;
4270 }
4271 return sum;
4272 }
4273
4274 /* Create file NEW copying its attributes from file OLD. If
4275 OLD is 0 or does not exist, create based on the value of
4276 vms_stmlf_recfm. */
4277
4278 /* Protection value the file should ultimately have.
4279 Set by create_copy_attrs, and use by rename_sansversions. */
4280 static unsigned short int fab_final_pro;
4281
4282 int
4283 creat_copy_attrs (old, new)
4284 char *old, *new;
4285 {
4286 struct FAB fab = cc$rms_fab;
4287 struct XABPRO xabpro;
4288 char aclbuf[256]; /* Choice of size is arbitrary. See below. */
4289 extern int vms_stmlf_recfm;
4290
4291 if (old)
4292 {
4293 fab.fab$b_fac = FAB$M_GET;
4294 fab.fab$l_fna = old;
4295 fab.fab$b_fns = strlen (old);
4296 fab.fab$l_xab = (char *) &xabpro;
4297 xabpro = cc$rms_xabpro;
4298 xabpro.xab$l_aclbuf = aclbuf;
4299 xabpro.xab$w_aclsiz = sizeof aclbuf;
4300 /* Call $OPEN to fill in the fab & xabpro fields. */
4301 if (SYS$OPEN (&fab, 0, 0) & 1)
4302 {
4303 SYS$CLOSE (&fab, 0, 0);
4304 fab.fab$l_alq = 0; /* zero the allocation quantity */
4305 if (xabpro.xab$w_acllen > 0)
4306 {
4307 if (xabpro.xab$w_acllen > sizeof aclbuf)
4308 /* If the acl buffer was too short, redo open with longer one.
4309 Wouldn't need to do this if there were some system imposed
4310 limit on the size of an ACL, but I can't find any such. */
4311 {
4312 xabpro.xab$l_aclbuf = (char *) alloca (xabpro.xab$w_acllen);
4313 xabpro.xab$w_aclsiz = xabpro.xab$w_acllen;
4314 if (SYS$OPEN (&fab, 0, 0) & 1)
4315 SYS$CLOSE (&fab, 0, 0);
4316 else
4317 old = 0;
4318 }
4319 }
4320 else
4321 xabpro.xab$l_aclbuf = 0;
4322 }
4323 else
4324 old = 0;
4325 }
4326 fab.fab$l_fna = new;
4327 fab.fab$b_fns = strlen (new);
4328 if (!old)
4329 {
4330 fab.fab$l_xab = 0;
4331 fab.fab$b_rfm = vms_stmlf_recfm ? FAB$C_STMLF : FAB$C_VAR;
4332 fab.fab$b_rat = FAB$M_CR;
4333 }
4334
4335 /* Set the file protections such that we will be able to manipulate
4336 this file. Once we are done writing and renaming it, we will set
4337 the protections back. */
4338 if (old)
4339 fab_final_pro = xabpro.xab$w_pro;
4340 else
4341 SYS$SETDFPROT (0, &fab_final_pro);
4342 xabpro.xab$w_pro &= 0xff0f; /* set O:rewd for now. This is set back later. */
4343
4344 /* Create the new file with either default attrs or attrs copied
4345 from old file. */
4346 if (!(SYS$CREATE (&fab, 0, 0) & 1))
4347 return -1;
4348 SYS$CLOSE (&fab, 0, 0);
4349 /* As this is a "replacement" for creat, return a file descriptor
4350 opened for writing. */
4351 return open (new, O_WRONLY);
4352 }
4353
4354 #ifdef creat
4355 #undef creat
4356 #include <varargs.h>
4357 #ifdef __GNUC__
4358 #ifndef va_count
4359 #define va_count(X) ((X) = *(((int *) &(va_alist)) - 1))
4360 #endif
4361 #endif
4362
4363 int
4364 sys_creat (va_alist)
4365 va_dcl
4366 {
4367 va_list list_incrementer;
4368 char *name;
4369 int mode;
4370 int rfd; /* related file descriptor */
4371 int fd; /* Our new file descriptor */
4372 int count;
4373 struct stat st_buf;
4374 char rfm[12];
4375 char rat[15];
4376 char mrs[13];
4377 char fsz[13];
4378 extern int vms_stmlf_recfm;
4379
4380 va_count (count);
4381 va_start (list_incrementer);
4382 name = va_arg (list_incrementer, char *);
4383 mode = va_arg (list_incrementer, int);
4384 if (count > 2)
4385 rfd = va_arg (list_incrementer, int);
4386 va_end (list_incrementer);
4387 if (count > 2)
4388 {
4389 /* Use information from the related file descriptor to set record
4390 format of the newly created file. */
4391 fstat (rfd, &st_buf);
4392 switch (st_buf.st_fab_rfm)
4393 {
4394 case FAB$C_FIX:
4395 strcpy (rfm, "rfm = fix");
4396 sprintf (mrs, "mrs = %d", st_buf.st_fab_mrs);
4397 strcpy (rat, "rat = ");
4398 if (st_buf.st_fab_rat & FAB$M_CR)
4399 strcat (rat, "cr");
4400 else if (st_buf.st_fab_rat & FAB$M_FTN)
4401 strcat (rat, "ftn");
4402 else if (st_buf.st_fab_rat & FAB$M_PRN)
4403 strcat (rat, "prn");
4404 if (st_buf.st_fab_rat & FAB$M_BLK)
4405 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4406 strcat (rat, ", blk");
4407 else
4408 strcat (rat, "blk");
4409 return creat (name, 0, rfm, rat, mrs);
4410
4411 case FAB$C_VFC:
4412 strcpy (rfm, "rfm = vfc");
4413 sprintf (fsz, "fsz = %d", st_buf.st_fab_fsz);
4414 strcpy (rat, "rat = ");
4415 if (st_buf.st_fab_rat & FAB$M_CR)
4416 strcat (rat, "cr");
4417 else if (st_buf.st_fab_rat & FAB$M_FTN)
4418 strcat (rat, "ftn");
4419 else if (st_buf.st_fab_rat & FAB$M_PRN)
4420 strcat (rat, "prn");
4421 if (st_buf.st_fab_rat & FAB$M_BLK)
4422 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4423 strcat (rat, ", blk");
4424 else
4425 strcat (rat, "blk");
4426 return creat (name, 0, rfm, rat, fsz);
4427
4428 case FAB$C_STM:
4429 strcpy (rfm, "rfm = stm");
4430 break;
4431
4432 case FAB$C_STMCR:
4433 strcpy (rfm, "rfm = stmcr");
4434 break;
4435
4436 case FAB$C_STMLF:
4437 strcpy (rfm, "rfm = stmlf");
4438 break;
4439
4440 case FAB$C_UDF:
4441 strcpy (rfm, "rfm = udf");
4442 break;
4443
4444 case FAB$C_VAR:
4445 strcpy (rfm, "rfm = var");
4446 break;
4447 }
4448 strcpy (rat, "rat = ");
4449 if (st_buf.st_fab_rat & FAB$M_CR)
4450 strcat (rat, "cr");
4451 else if (st_buf.st_fab_rat & FAB$M_FTN)
4452 strcat (rat, "ftn");
4453 else if (st_buf.st_fab_rat & FAB$M_PRN)
4454 strcat (rat, "prn");
4455 if (st_buf.st_fab_rat & FAB$M_BLK)
4456 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4457 strcat (rat, ", blk");
4458 else
4459 strcat (rat, "blk");
4460 }
4461 else
4462 {
4463 strcpy (rfm, vms_stmlf_recfm ? "rfm = stmlf" : "rfm=var");
4464 strcpy (rat, "rat=cr");
4465 }
4466 /* Until the VAX C RTL fixes the many bugs with modes, always use
4467 mode 0 to get the user's default protection. */
4468 fd = creat (name, 0, rfm, rat);
4469 if (fd < 0 && errno == EEXIST)
4470 {
4471 if (unlink (name) < 0)
4472 report_file_error ("delete", build_string (name));
4473 fd = creat (name, 0, rfm, rat);
4474 }
4475 return fd;
4476 }
4477 #endif /* creat */
4478
4479 /* fwrite to stdout is S L O W. Speed it up by using fputc...*/
4480 int
4481 sys_fwrite (ptr, size, num, fp)
4482 register char * ptr;
4483 FILE * fp;
4484 {
4485 register int tot = num * size;
4486
4487 while (tot--)
4488 fputc (*ptr++, fp);
4489 return num;
4490 }
4491
4492 /*
4493 * The VMS C library routine creat actually creates a new version of an
4494 * existing file rather than truncating the old version. There are times
4495 * when this is not the desired behavior, for instance, when writing an
4496 * auto save file (you only want one version), or when you don't have
4497 * write permission in the directory containing the file (but the file
4498 * itself is writable). Hence this routine, which is equivalent to
4499 * "close (creat (fn, 0));" on Unix if fn already exists.
4500 */
4501 int
4502 vms_truncate (fn)
4503 char *fn;
4504 {
4505 struct FAB xfab = cc$rms_fab;
4506 struct RAB xrab = cc$rms_rab;
4507 int status;
4508
4509 xfab.fab$l_fop = FAB$M_TEF; /* free allocated but unused blocks on close */
4510 xfab.fab$b_fac = FAB$M_TRN | FAB$M_GET; /* allow truncate and get access */
4511 xfab.fab$b_shr = FAB$M_NIL; /* allow no sharing - file must be locked */
4512 xfab.fab$l_fna = fn;
4513 xfab.fab$b_fns = strlen (fn);
4514 xfab.fab$l_dna = ";0"; /* default to latest version of the file */
4515 xfab.fab$b_dns = 2;
4516 xrab.rab$l_fab = &xfab;
4517
4518 /* This gibberish opens the file, positions to the first record, and
4519 deletes all records from there until the end of file. */
4520 if ((SYS$OPEN (&xfab) & 01) == 01)
4521 {
4522 if ((SYS$CONNECT (&xrab) & 01) == 01 &&
4523 (SYS$FIND (&xrab) & 01) == 01 &&
4524 (SYS$TRUNCATE (&xrab) & 01) == 01)
4525 status = 0;
4526 else
4527 status = -1;
4528 }
4529 else
4530 status = -1;
4531 SYS$CLOSE (&xfab);
4532 return status;
4533 }
4534
4535 /* Define this symbol to actually read SYSUAF.DAT. This requires either
4536 SYSPRV or a readable SYSUAF.DAT. */
4537
4538 #ifdef READ_SYSUAF
4539 /*
4540 * getuaf.c
4541 *
4542 * Routine to read the VMS User Authorization File and return
4543 * a specific user's record.
4544 */
4545
4546 static struct UAF retuaf;
4547
4548 struct UAF *
4549 get_uaf_name (uname)
4550 char * uname;
4551 {
4552 register status;
4553 struct FAB uaf_fab;
4554 struct RAB uaf_rab;
4555
4556 uaf_fab = cc$rms_fab;
4557 uaf_rab = cc$rms_rab;
4558 /* initialize fab fields */
4559 uaf_fab.fab$l_fna = "SYS$SYSTEM:SYSUAF.DAT";
4560 uaf_fab.fab$b_fns = 21;
4561 uaf_fab.fab$b_fac = FAB$M_GET;
4562 uaf_fab.fab$b_org = FAB$C_IDX;
4563 uaf_fab.fab$b_shr = FAB$M_GET|FAB$M_PUT|FAB$M_UPD|FAB$M_DEL;
4564 /* initialize rab fields */
4565 uaf_rab.rab$l_fab = &uaf_fab;
4566 /* open the User Authorization File */
4567 status = SYS$OPEN (&uaf_fab);
4568 if (!(status&1))
4569 {
4570 errno = EVMSERR;
4571 vaxc$errno = status;
4572 return 0;
4573 }
4574 status = SYS$CONNECT (&uaf_rab);
4575 if (!(status&1))
4576 {
4577 errno = EVMSERR;
4578 vaxc$errno = status;
4579 return 0;
4580 }
4581 /* read the requested record - index is in uname */
4582 uaf_rab.rab$l_kbf = uname;
4583 uaf_rab.rab$b_ksz = strlen (uname);
4584 uaf_rab.rab$b_rac = RAB$C_KEY;
4585 uaf_rab.rab$l_ubf = (char *)&retuaf;
4586 uaf_rab.rab$w_usz = sizeof retuaf;
4587 status = SYS$GET (&uaf_rab);
4588 if (!(status&1))
4589 {
4590 errno = EVMSERR;
4591 vaxc$errno = status;
4592 return 0;
4593 }
4594 /* close the User Authorization File */
4595 status = SYS$DISCONNECT (&uaf_rab);
4596 if (!(status&1))
4597 {
4598 errno = EVMSERR;
4599 vaxc$errno = status;
4600 return 0;
4601 }
4602 status = SYS$CLOSE (&uaf_fab);
4603 if (!(status&1))
4604 {
4605 errno = EVMSERR;
4606 vaxc$errno = status;
4607 return 0;
4608 }
4609 return &retuaf;
4610 }
4611
4612 struct UAF *
4613 get_uaf_uic (uic)
4614 unsigned long uic;
4615 {
4616 register status;
4617 struct FAB uaf_fab;
4618 struct RAB uaf_rab;
4619
4620 uaf_fab = cc$rms_fab;
4621 uaf_rab = cc$rms_rab;
4622 /* initialize fab fields */
4623 uaf_fab.fab$l_fna = "SYS$SYSTEM:SYSUAF.DAT";
4624 uaf_fab.fab$b_fns = 21;
4625 uaf_fab.fab$b_fac = FAB$M_GET;
4626 uaf_fab.fab$b_org = FAB$C_IDX;
4627 uaf_fab.fab$b_shr = FAB$M_GET|FAB$M_PUT|FAB$M_UPD|FAB$M_DEL;
4628 /* initialize rab fields */
4629 uaf_rab.rab$l_fab = &uaf_fab;
4630 /* open the User Authorization File */
4631 status = SYS$OPEN (&uaf_fab);
4632 if (!(status&1))
4633 {
4634 errno = EVMSERR;
4635 vaxc$errno = status;
4636 return 0;
4637 }
4638 status = SYS$CONNECT (&uaf_rab);
4639 if (!(status&1))
4640 {
4641 errno = EVMSERR;
4642 vaxc$errno = status;
4643 return 0;
4644 }
4645 /* read the requested record - index is in uic */
4646 uaf_rab.rab$b_krf = 1; /* 1st alternate key */
4647 uaf_rab.rab$l_kbf = (char *) &uic;
4648 uaf_rab.rab$b_ksz = sizeof uic;
4649 uaf_rab.rab$b_rac = RAB$C_KEY;
4650 uaf_rab.rab$l_ubf = (char *)&retuaf;
4651 uaf_rab.rab$w_usz = sizeof retuaf;
4652 status = SYS$GET (&uaf_rab);
4653 if (!(status&1))
4654 {
4655 errno = EVMSERR;
4656 vaxc$errno = status;
4657 return 0;
4658 }
4659 /* close the User Authorization File */
4660 status = SYS$DISCONNECT (&uaf_rab);
4661 if (!(status&1))
4662 {
4663 errno = EVMSERR;
4664 vaxc$errno = status;
4665 return 0;
4666 }
4667 status = SYS$CLOSE (&uaf_fab);
4668 if (!(status&1))
4669 {
4670 errno = EVMSERR;
4671 vaxc$errno = status;
4672 return 0;
4673 }
4674 return &retuaf;
4675 }
4676
4677 static struct passwd retpw;
4678
4679 struct passwd *
4680 cnv_uaf_pw (up)
4681 struct UAF * up;
4682 {
4683 char * ptr;
4684
4685 /* copy these out first because if the username is 32 chars, the next
4686 section will overwrite the first byte of the UIC */
4687 retpw.pw_uid = up->uaf$w_mem;
4688 retpw.pw_gid = up->uaf$w_grp;
4689
4690 /* I suppose this is not the best style, to possibly overwrite one
4691 byte beyond the end of the field, but what the heck... */
4692 ptr = &up->uaf$t_username[UAF$S_USERNAME];
4693 while (ptr[-1] == ' ')
4694 ptr--;
4695 *ptr = '\0';
4696 strcpy (retpw.pw_name, up->uaf$t_username);
4697
4698 /* the rest of these are counted ascii strings */
4699 strncpy (retpw.pw_gecos, &up->uaf$t_owner[1], up->uaf$t_owner[0]);
4700 retpw.pw_gecos[up->uaf$t_owner[0]] = '\0';
4701 strncpy (retpw.pw_dir, &up->uaf$t_defdev[1], up->uaf$t_defdev[0]);
4702 retpw.pw_dir[up->uaf$t_defdev[0]] = '\0';
4703 strncat (retpw.pw_dir, &up->uaf$t_defdir[1], up->uaf$t_defdir[0]);
4704 retpw.pw_dir[up->uaf$t_defdev[0] + up->uaf$t_defdir[0]] = '\0';
4705 strncpy (retpw.pw_shell, &up->uaf$t_defcli[1], up->uaf$t_defcli[0]);
4706 retpw.pw_shell[up->uaf$t_defcli[0]] = '\0';
4707
4708 return &retpw;
4709 }
4710 #else /* not READ_SYSUAF */
4711 static struct passwd retpw;
4712 #endif /* not READ_SYSUAF */
4713
4714 struct passwd *
4715 getpwnam (name)
4716 char * name;
4717 {
4718 #ifdef READ_SYSUAF
4719 struct UAF *up;
4720 #else
4721 char * user;
4722 char * dir;
4723 unsigned char * full;
4724 #endif /* READ_SYSUAF */
4725 char *ptr = name;
4726
4727 while (*ptr)
4728 {
4729 if ('a' <= *ptr && *ptr <= 'z')
4730 *ptr -= 040;
4731 ptr++;
4732 }
4733 #ifdef READ_SYSUAF
4734 if (!(up = get_uaf_name (name)))
4735 return 0;
4736 return cnv_uaf_pw (up);
4737 #else
4738 if (strcmp (name, getenv ("USER")) == 0)
4739 {
4740 retpw.pw_uid = getuid ();
4741 retpw.pw_gid = getgid ();
4742 strcpy (retpw.pw_name, name);
4743 if (full = egetenv ("FULLNAME"))
4744 strcpy (retpw.pw_gecos, full);
4745 else
4746 *retpw.pw_gecos = '\0';
4747 strcpy (retpw.pw_dir, egetenv ("HOME"));
4748 *retpw.pw_shell = '\0';
4749 return &retpw;
4750 }
4751 else
4752 return 0;
4753 #endif /* not READ_SYSUAF */
4754 }
4755
4756 struct passwd *
4757 getpwuid (uid)
4758 unsigned long uid;
4759 {
4760 #ifdef READ_SYSUAF
4761 struct UAF * up;
4762
4763 if (!(up = get_uaf_uic (uid)))
4764 return 0;
4765 return cnv_uaf_pw (up);
4766 #else
4767 if (uid == sys_getuid ())
4768 return getpwnam (egetenv ("USER"));
4769 else
4770 return 0;
4771 #endif /* not READ_SYSUAF */
4772 }
4773
4774 /* return total address space available to the current process. This is
4775 the sum of the current p0 size, p1 size and free page table entries
4776 available. */
4777 int
4778 vlimit ()
4779 {
4780 int item_code;
4781 unsigned long free_pages;
4782 unsigned long frep0va;
4783 unsigned long frep1va;
4784 register status;
4785
4786 item_code = JPI$_FREPTECNT;
4787 if (((status = LIB$GETJPI (&item_code, 0, 0, &free_pages)) & 1) == 0)
4788 {
4789 errno = EVMSERR;
4790 vaxc$errno = status;
4791 return -1;
4792 }
4793 free_pages *= 512;
4794
4795 item_code = JPI$_FREP0VA;
4796 if (((status = LIB$GETJPI (&item_code, 0, 0, &frep0va)) & 1) == 0)
4797 {
4798 errno = EVMSERR;
4799 vaxc$errno = status;
4800 return -1;
4801 }
4802 item_code = JPI$_FREP1VA;
4803 if (((status = LIB$GETJPI (&item_code, 0, 0, &frep1va)) & 1) == 0)
4804 {
4805 errno = EVMSERR;
4806 vaxc$errno = status;
4807 return -1;
4808 }
4809
4810 return free_pages + frep0va + (0x7fffffff - frep1va);
4811 }
4812
4813 int
4814 define_logical_name (varname, string)
4815 char *varname;
4816 char *string;
4817 {
4818 struct dsc$descriptor_s strdsc =
4819 {strlen (string), DSC$K_DTYPE_T, DSC$K_CLASS_S, string};
4820 struct dsc$descriptor_s envdsc =
4821 {strlen (varname), DSC$K_DTYPE_T, DSC$K_CLASS_S, varname};
4822 struct dsc$descriptor_s lnmdsc =
4823 {7, DSC$K_DTYPE_T, DSC$K_CLASS_S, "LNM$JOB"};
4824
4825 return LIB$SET_LOGICAL (&envdsc, &strdsc, &lnmdsc, 0, 0);
4826 }
4827
4828 int
4829 delete_logical_name (varname)
4830 char *varname;
4831 {
4832 struct dsc$descriptor_s envdsc =
4833 {strlen (varname), DSC$K_DTYPE_T, DSC$K_CLASS_S, varname};
4834 struct dsc$descriptor_s lnmdsc =
4835 {7, DSC$K_DTYPE_T, DSC$K_CLASS_S, "LNM$JOB"};
4836
4837 return LIB$DELETE_LOGICAL (&envdsc, &lnmdsc);
4838 }
4839
4840 int
4841 ulimit ()
4842 {
4843 return 0;
4844 }
4845
4846 int
4847 setpgrp ()
4848 {
4849 return 0;
4850 }
4851
4852 int
4853 execvp ()
4854 {
4855 error ("execvp system call not implemented");
4856 return -1;
4857 }
4858
4859 int
4860 rename (from, to)
4861 char *from, *to;
4862 {
4863 int status;
4864 struct FAB from_fab = cc$rms_fab, to_fab = cc$rms_fab;
4865 struct NAM from_nam = cc$rms_nam, to_nam = cc$rms_nam;
4866 char from_esn[NAM$C_MAXRSS];
4867 char to_esn[NAM$C_MAXRSS];
4868
4869 from_fab.fab$l_fna = from;
4870 from_fab.fab$b_fns = strlen (from);
4871 from_fab.fab$l_nam = &from_nam;
4872 from_fab.fab$l_fop = FAB$M_NAM;
4873
4874 from_nam.nam$l_esa = from_esn;
4875 from_nam.nam$b_ess = sizeof from_esn;
4876
4877 to_fab.fab$l_fna = to;
4878 to_fab.fab$b_fns = strlen (to);
4879 to_fab.fab$l_nam = &to_nam;
4880 to_fab.fab$l_fop = FAB$M_NAM;
4881
4882 to_nam.nam$l_esa = to_esn;
4883 to_nam.nam$b_ess = sizeof to_esn;
4884
4885 status = SYS$RENAME (&from_fab, 0, 0, &to_fab);
4886
4887 if (status & 1)
4888 return 0;
4889 else
4890 {
4891 if (status == RMS$_DEV)
4892 errno = EXDEV;
4893 else
4894 errno = EVMSERR;
4895 vaxc$errno = status;
4896 return -1;
4897 }
4898 }
4899
4900 /* This function renames a file like `rename', but it strips
4901 the version number from the "to" filename, such that the "to" file is
4902 will always be a new version. It also sets the file protection once it is
4903 finished. The protection that we will use is stored in fab_final_pro,
4904 and was set when we did a creat_copy_attrs to create the file that we
4905 are renaming.
4906
4907 We could use the chmod function, but Eunichs uses 3 bits per user category
4908 to describe the protection, and VMS uses 4 (write and delete are separate
4909 bits). To maintain portability, the VMS implementation of `chmod' wires
4910 the W and D bits together. */
4911
4912
4913 static struct fibdef fib; /* We need this initialized to zero */
4914 char vms_file_written[NAM$C_MAXRSS];
4915
4916 int
4917 rename_sans_version (from,to)
4918 char *from, *to;
4919 {
4920 short int chan;
4921 int stat;
4922 short int iosb[4];
4923 int status;
4924 struct FAB to_fab = cc$rms_fab;
4925 struct NAM to_nam = cc$rms_nam;
4926 struct dsc$descriptor fib_d ={sizeof (fib),0,0,(char*) &fib};
4927 struct dsc$descriptor fib_attr[2]
4928 = {{sizeof (fab_final_pro),ATR$C_FPRO,0,(char*) &fab_final_pro},{0,0,0,0}};
4929 char to_esn[NAM$C_MAXRSS];
4930
4931 $DESCRIPTOR (disk,to_esn);
4932
4933 to_fab.fab$l_fna = to;
4934 to_fab.fab$b_fns = strlen (to);
4935 to_fab.fab$l_nam = &to_nam;
4936 to_fab.fab$l_fop = FAB$M_NAM;
4937
4938 to_nam.nam$l_esa = to_esn;
4939 to_nam.nam$b_ess = sizeof to_esn;
4940
4941 status = SYS$PARSE (&to_fab, 0, 0); /* figure out the full file name */
4942
4943 if (to_nam.nam$l_fnb && NAM$M_EXP_VER)
4944 *(to_nam.nam$l_ver) = '\0';
4945
4946 stat = rename (from, to_esn);
4947 if (stat < 0)
4948 return stat;
4949
4950 strcpy (vms_file_written, to_esn);
4951
4952 to_fab.fab$l_fna = vms_file_written; /* this points to the versionless name */
4953 to_fab.fab$b_fns = strlen (vms_file_written);
4954
4955 /* Now set the file protection to the correct value */
4956 SYS$OPEN (&to_fab, 0, 0); /* This fills in the nam$w_fid fields */
4957
4958 /* Copy these fields into the fib */
4959 fib.fib$r_fid_overlay.fib$w_fid[0] = to_nam.nam$w_fid[0];
4960 fib.fib$r_fid_overlay.fib$w_fid[1] = to_nam.nam$w_fid[1];
4961 fib.fib$r_fid_overlay.fib$w_fid[2] = to_nam.nam$w_fid[2];
4962
4963 SYS$CLOSE (&to_fab, 0, 0);
4964
4965 stat = SYS$ASSIGN (&disk, &chan, 0, 0); /* open a channel to the disk */
4966 if (!stat)
4967 LIB$SIGNAL (stat);
4968 stat = SYS$QIOW (0, chan, IO$_MODIFY, iosb, 0, 0, &fib_d,
4969 0, 0, 0, &fib_attr, 0);
4970 if (!stat)
4971 LIB$SIGNAL (stat);
4972 stat = SYS$DASSGN (chan);
4973 if (!stat)
4974 LIB$SIGNAL (stat);
4975 strcpy (vms_file_written, to_esn); /* We will write this to the terminal*/
4976 return 0;
4977 }
4978
4979 int
4980 link (file, new)
4981 char * file, * new;
4982 {
4983 register status;
4984 struct FAB fab;
4985 struct NAM nam;
4986 unsigned short fid[3];
4987 char esa[NAM$C_MAXRSS];
4988
4989 fab = cc$rms_fab;
4990 fab.fab$l_fop = FAB$M_OFP;
4991 fab.fab$l_fna = file;
4992 fab.fab$b_fns = strlen (file);
4993 fab.fab$l_nam = &nam;
4994
4995 nam = cc$rms_nam;
4996 nam.nam$l_esa = esa;
4997 nam.nam$b_ess = NAM$C_MAXRSS;
4998
4999 status = SYS$PARSE (&fab);
5000 if ((status & 1) == 0)
5001 {
5002 errno = EVMSERR;
5003 vaxc$errno = status;
5004 return -1;
5005 }
5006 status = SYS$SEARCH (&fab);
5007 if ((status & 1) == 0)
5008 {
5009 errno = EVMSERR;
5010 vaxc$errno = status;
5011 return -1;
5012 }
5013
5014 fid[0] = nam.nam$w_fid[0];
5015 fid[1] = nam.nam$w_fid[1];
5016 fid[2] = nam.nam$w_fid[2];
5017
5018 fab.fab$l_fna = new;
5019 fab.fab$b_fns = strlen (new);
5020
5021 status = SYS$PARSE (&fab);
5022 if ((status & 1) == 0)
5023 {
5024 errno = EVMSERR;
5025 vaxc$errno = status;
5026 return -1;
5027 }
5028
5029 nam.nam$w_fid[0] = fid[0];
5030 nam.nam$w_fid[1] = fid[1];
5031 nam.nam$w_fid[2] = fid[2];
5032
5033 nam.nam$l_esa = nam.nam$l_name;
5034 nam.nam$b_esl = nam.nam$b_name + nam.nam$b_type + nam.nam$b_ver;
5035
5036 status = SYS$ENTER (&fab);
5037 if ((status & 1) == 0)
5038 {
5039 errno = EVMSERR;
5040 vaxc$errno = status;
5041 return -1;
5042 }
5043
5044 return 0;
5045 }
5046
5047 void
5048 croak (badfunc)
5049 char *badfunc;
5050 {
5051 printf ("%s not yet implemented\r\n", badfunc);
5052 reset_sys_modes ();
5053 exit (1);
5054 }
5055
5056 long
5057 random ()
5058 {
5059 /* Arrange to return a range centered on zero. */
5060 return rand () - (1 << 30);
5061 }
5062
5063 void
5064 srandom (seed)
5065 {
5066 srand (seed);
5067 }
5068 #endif /* VMS */
5069 \f
5070 #ifdef AIXHFT
5071
5072 /* Called from init_sys_modes. */
5073 void
5074 hft_init ()
5075 {
5076 int junk;
5077
5078 /* If we're not on an HFT we shouldn't do any of this. We determine
5079 if we are on an HFT by trying to get an HFT error code. If this
5080 call fails, we're not on an HFT. */
5081 #ifdef IBMR2AIX
5082 if (ioctl (0, HFQERROR, &junk) < 0)
5083 return;
5084 #else /* not IBMR2AIX */
5085 if (ioctl (0, HFQEIO, 0) < 0)
5086 return;
5087 #endif /* not IBMR2AIX */
5088
5089 /* On AIX the default hft keyboard mapping uses backspace rather than delete
5090 as the rubout key's ASCII code. Here this is changed. The bug is that
5091 there's no way to determine the old mapping, so in reset_sys_modes
5092 we need to assume that the normal map had been present. Of course, this
5093 code also doesn't help if on a terminal emulator which doesn't understand
5094 HFT VTD's. */
5095 {
5096 struct hfbuf buf;
5097 struct hfkeymap keymap;
5098
5099 buf.hf_bufp = (char *)&keymap;
5100 buf.hf_buflen = sizeof (keymap);
5101 keymap.hf_nkeys = 2;
5102 keymap.hfkey[0].hf_kpos = 15;
5103 keymap.hfkey[0].hf_kstate = HFMAPCHAR | HFSHFNONE;
5104 #ifdef IBMR2AIX
5105 keymap.hfkey[0].hf_keyidh = '<';
5106 #else /* not IBMR2AIX */
5107 keymap.hfkey[0].hf_page = '<';
5108 #endif /* not IBMR2AIX */
5109 keymap.hfkey[0].hf_char = 127;
5110 keymap.hfkey[1].hf_kpos = 15;
5111 keymap.hfkey[1].hf_kstate = HFMAPCHAR | HFSHFSHFT;
5112 #ifdef IBMR2AIX
5113 keymap.hfkey[1].hf_keyidh = '<';
5114 #else /* not IBMR2AIX */
5115 keymap.hfkey[1].hf_page = '<';
5116 #endif /* not IBMR2AIX */
5117 keymap.hfkey[1].hf_char = 127;
5118 hftctl (0, HFSKBD, &buf);
5119 }
5120 /* The HFT system on AIX doesn't optimize for scrolling, so it's really ugly
5121 at times. */
5122 line_ins_del_ok = char_ins_del_ok = 0;
5123 }
5124
5125 /* Reset the rubout key to backspace. */
5126
5127 void
5128 hft_reset ()
5129 {
5130 struct hfbuf buf;
5131 struct hfkeymap keymap;
5132 int junk;
5133
5134 #ifdef IBMR2AIX
5135 if (ioctl (0, HFQERROR, &junk) < 0)
5136 return;
5137 #else /* not IBMR2AIX */
5138 if (ioctl (0, HFQEIO, 0) < 0)
5139 return;
5140 #endif /* not IBMR2AIX */
5141
5142 buf.hf_bufp = (char *)&keymap;
5143 buf.hf_buflen = sizeof (keymap);
5144 keymap.hf_nkeys = 2;
5145 keymap.hfkey[0].hf_kpos = 15;
5146 keymap.hfkey[0].hf_kstate = HFMAPCHAR | HFSHFNONE;
5147 #ifdef IBMR2AIX
5148 keymap.hfkey[0].hf_keyidh = '<';
5149 #else /* not IBMR2AIX */
5150 keymap.hfkey[0].hf_page = '<';
5151 #endif /* not IBMR2AIX */
5152 keymap.hfkey[0].hf_char = 8;
5153 keymap.hfkey[1].hf_kpos = 15;
5154 keymap.hfkey[1].hf_kstate = HFMAPCHAR | HFSHFSHFT;
5155 #ifdef IBMR2AIX
5156 keymap.hfkey[1].hf_keyidh = '<';
5157 #else /* not IBMR2AIX */
5158 keymap.hfkey[1].hf_page = '<';
5159 #endif /* not IBMR2AIX */
5160 keymap.hfkey[1].hf_char = 8;
5161 hftctl (0, HFSKBD, &buf);
5162 }
5163
5164 #endif /* AIXHFT */
5165
5166 #ifdef USE_DL_STUBS
5167
5168 /* These are included on Sunos 4.1 when we do not use shared libraries.
5169 X11 libraries may refer to these functions but (we hope) do not
5170 actually call them. */
5171
5172 void *
5173 dlopen ()
5174 {
5175 return 0;
5176 }
5177
5178 void *
5179 dlsym ()
5180 {
5181 return 0;
5182 }
5183
5184 int
5185 dlclose ()
5186 {
5187 return -1;
5188 }
5189
5190 #endif /* USE_DL_STUBS */
5191 \f
5192 #ifndef BSTRING
5193
5194 #ifndef bzero
5195
5196 void
5197 bzero (b, length)
5198 register char *b;
5199 register int length;
5200 {
5201 #ifdef VMS
5202 short zero = 0;
5203 long max_str = 65535;
5204
5205 while (length > max_str) {
5206 (void) LIB$MOVC5 (&zero, &zero, &zero, &max_str, b);
5207 length -= max_str;
5208 b += max_str;
5209 }
5210 max_str = length;
5211 (void) LIB$MOVC5 (&zero, &zero, &zero, &max_str, b);
5212 #else
5213 while (length-- > 0)
5214 *b++ = 0;
5215 #endif /* not VMS */
5216 }
5217
5218 #endif /* no bzero */
5219 #endif /* BSTRING */
5220
5221 #if (!defined (BSTRING) && !defined (bcopy)) || defined (NEED_BCOPY)
5222 #undef bcopy
5223
5224 /* Saying `void' requires a declaration, above, where bcopy is used
5225 and that declaration causes pain for systems where bcopy is a macro. */
5226 bcopy (b1, b2, length)
5227 register char *b1;
5228 register char *b2;
5229 register int length;
5230 {
5231 #ifdef VMS
5232 long max_str = 65535;
5233
5234 while (length > max_str) {
5235 (void) LIB$MOVC3 (&max_str, b1, b2);
5236 length -= max_str;
5237 b1 += max_str;
5238 b2 += max_str;
5239 }
5240 max_str = length;
5241 (void) LIB$MOVC3 (&length, b1, b2);
5242 #else
5243 while (length-- > 0)
5244 *b2++ = *b1++;
5245 #endif /* not VMS */
5246 }
5247 #endif /* (!defined (BSTRING) && !defined (bcopy)) || defined (NEED_BCOPY) */
5248
5249 #ifndef BSTRING
5250 #ifndef bcmp
5251 int
5252 bcmp (b1, b2, length) /* This could be a macro! */
5253 register char *b1;
5254 register char *b2;
5255 register int length;
5256 {
5257 #ifdef VMS
5258 struct dsc$descriptor_s src1 = {length, DSC$K_DTYPE_T, DSC$K_CLASS_S, b1};
5259 struct dsc$descriptor_s src2 = {length, DSC$K_DTYPE_T, DSC$K_CLASS_S, b2};
5260
5261 return STR$COMPARE (&src1, &src2);
5262 #else
5263 while (length-- > 0)
5264 if (*b1++ != *b2++)
5265 return 1;
5266
5267 return 0;
5268 #endif /* not VMS */
5269 }
5270 #endif /* no bcmp */
5271 #endif /* not BSTRING */
5272 \f
5273 #ifndef HAVE_STRSIGNAL
5274 char *
5275 strsignal (code)
5276 int code;
5277 {
5278 char *signame = 0;
5279
5280 if (0 <= code && code < NSIG)
5281 {
5282 #ifdef VMS
5283 signame = sys_errlist[code];
5284 #else
5285 /* Cast to suppress warning if the table has const char *. */
5286 signame = (char *) sys_siglist[code];
5287 #endif
5288 }
5289
5290 return signame;
5291 }
5292 #endif /* HAVE_STRSIGNAL */
5293
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