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