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Update years in copyright notice; nfc.
[bpt/emacs.git] / src / sysdep.c
1 /* Interfaces to system-dependent kernel and library entries.
2 Copyright (C) 1985, 1986, 1987, 1988, 1993, 1994, 1995, 1999, 2000, 2001,
3 2002, 2003, 2004, 2005 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., 51 Franklin Street, Fifth Floor,
20 Boston, MA 02110-1301, 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, (char *) 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 /* Use a fresh channel since the current one may have stale info
1722 (for example, from prior to a suspend); and to avoid a dependency
1723 in the init sequence. */
1724 int chan;
1725 struct sensemode tty;
1726
1727 SYS$ASSIGN (&input_dsc, &chan, 0, 0);
1728 SYS$QIOW (0, chan, IO$_SENSEMODE, &tty, 0, 0,
1729 &tty.class, 12, 0, 0, 0, 0);
1730 SYS$DASSGN (chan);
1731 *widthp = tty.scr_wid;
1732 *heightp = tty.scr_len;
1733
1734 #else
1735 #ifdef MSDOS
1736 *widthp = ScreenCols ();
1737 *heightp = ScreenRows ();
1738 #else /* system doesn't know size */
1739 *widthp = 0;
1740 *heightp = 0;
1741 #endif
1742
1743 #endif /* not VMS */
1744 #endif /* not SunOS-style */
1745 #endif /* not BSD-style */
1746 }
1747
1748 /* Set the logical window size associated with descriptor FD
1749 to HEIGHT and WIDTH. This is used mainly with ptys. */
1750
1751 int
1752 set_window_size (fd, height, width)
1753 int fd, height, width;
1754 {
1755 #ifdef TIOCSWINSZ
1756
1757 /* BSD-style. */
1758 struct winsize size;
1759 size.ws_row = height;
1760 size.ws_col = width;
1761
1762 if (ioctl (fd, TIOCSWINSZ, &size) == -1)
1763 return 0; /* error */
1764 else
1765 return 1;
1766
1767 #else
1768 #ifdef TIOCSSIZE
1769
1770 /* SunOS - style. */
1771 struct ttysize size;
1772 size.ts_lines = height;
1773 size.ts_cols = width;
1774
1775 if (ioctl (fd, TIOCGSIZE, &size) == -1)
1776 return 0;
1777 else
1778 return 1;
1779 #else
1780 return -1;
1781 #endif /* not SunOS-style */
1782 #endif /* not BSD-style */
1783 }
1784
1785 \f
1786 /* Prepare the terminal for exiting Emacs; move the cursor to the
1787 bottom of the frame, turn off interrupt-driven I/O, etc. */
1788 void
1789 reset_sys_modes ()
1790 {
1791 struct frame *sf;
1792
1793 if (noninteractive)
1794 {
1795 fflush (stdout);
1796 return;
1797 }
1798 if (!term_initted)
1799 return;
1800 #ifdef HAVE_WINDOW_SYSTEM
1801 /* Emacs' window system on MSDOG uses the `internal terminal' and therefore
1802 needs the clean-up code below. */
1803 if (!EQ (Vwindow_system, Qnil)
1804 #ifndef WINDOWSNT
1805 /* When running in tty mode on NT/Win95, we have a read_socket
1806 hook, but still need the rest of the clean-up code below. */
1807 || read_socket_hook
1808 #endif
1809 )
1810 return;
1811 #endif
1812 sf = SELECTED_FRAME ();
1813 cursor_to (FRAME_LINES (sf) - 1, 0);
1814 clear_end_of_line (FRAME_COLS (sf));
1815 /* clear_end_of_line may move the cursor */
1816 cursor_to (FRAME_LINES (sf) - 1, 0);
1817 #if defined (IBMR2AIX) && defined (AIXHFT)
1818 {
1819 /* HFT devices normally use ^J as a LF/CR. We forced it to
1820 do the LF only. Now, we need to reset it. */
1821 struct termio tty;
1822
1823 if (ioctl (1, HFTGETID, &tty) != -1)
1824 write (1, "\033[20h", 5);
1825 }
1826 #endif
1827
1828 reset_terminal_modes ();
1829 fflush (stdout);
1830 #ifdef BSD_SYSTEM
1831 #ifndef BSD4_1
1832 /* Avoid possible loss of output when changing terminal modes. */
1833 fsync (fileno (stdout));
1834 #endif
1835 #endif
1836
1837 #ifdef F_SETFL
1838 #ifndef F_SETOWN_BUG
1839 #ifdef F_SETOWN /* F_SETFL does not imply existence of F_SETOWN */
1840 if (interrupt_input)
1841 {
1842 reset_sigio ();
1843 fcntl (input_fd, F_SETOWN, old_fcntl_owner);
1844 }
1845 #endif /* F_SETOWN */
1846 #endif /* F_SETOWN_BUG */
1847 #ifdef O_NDELAY
1848 fcntl (input_fd, F_SETFL, fcntl (input_fd, F_GETFL, 0) & ~O_NDELAY);
1849 #endif
1850 #endif /* F_SETFL */
1851 #ifdef BSD4_1
1852 if (interrupt_input)
1853 reset_sigio ();
1854 #endif /* BSD4_1 */
1855
1856 if (old_tty_valid)
1857 while (EMACS_SET_TTY (input_fd, &old_tty, 0) < 0 && errno == EINTR)
1858 ;
1859
1860 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */
1861 dos_ttcooked ();
1862 #endif
1863
1864 #ifdef SET_LINE_DISCIPLINE
1865 /* Ultrix's termios *ignores* any line discipline except TERMIODISC.
1866 A different old line discipline is therefore not restored, yet.
1867 Restore the old line discipline by hand. */
1868 ioctl (0, TIOCSETD, &old_tty.main.c_line);
1869 #endif
1870
1871 #ifdef AIXHFT
1872 hft_reset ();
1873 #endif
1874
1875 #ifdef BSD_PGRPS
1876 widen_foreground_group ();
1877 #endif
1878 }
1879 \f
1880 #ifdef HAVE_PTYS
1881
1882 /* Set up the proper status flags for use of a pty. */
1883
1884 void
1885 setup_pty (fd)
1886 int fd;
1887 {
1888 /* I'm told that TOICREMOTE does not mean control chars
1889 "can't be sent" but rather that they don't have
1890 input-editing or signaling effects.
1891 That should be good, because we have other ways
1892 to do those things in Emacs.
1893 However, telnet mode seems not to work on 4.2.
1894 So TIOCREMOTE is turned off now. */
1895
1896 /* Under hp-ux, if TIOCREMOTE is turned on, some calls
1897 will hang. In particular, the "timeout" feature (which
1898 causes a read to return if there is no data available)
1899 does this. Also it is known that telnet mode will hang
1900 in such a way that Emacs must be stopped (perhaps this
1901 is the same problem).
1902
1903 If TIOCREMOTE is turned off, then there is a bug in
1904 hp-ux which sometimes loses data. Apparently the
1905 code which blocks the master process when the internal
1906 buffer fills up does not work. Other than this,
1907 though, everything else seems to work fine.
1908
1909 Since the latter lossage is more benign, we may as well
1910 lose that way. -- cph */
1911 #ifdef FIONBIO
1912 #if defined(SYSV_PTYS) || defined(UNIX98_PTYS)
1913 {
1914 int on = 1;
1915 ioctl (fd, FIONBIO, &on);
1916 }
1917 #endif
1918 #endif
1919 #ifdef IBMRTAIX
1920 /* On AIX, the parent gets SIGHUP when a pty attached child dies. So, we */
1921 /* ignore SIGHUP once we've started a child on a pty. Note that this may */
1922 /* cause EMACS not to die when it should, i.e., when its own controlling */
1923 /* tty goes away. I've complained to the AIX developers, and they may */
1924 /* change this behavior, but I'm not going to hold my breath. */
1925 signal (SIGHUP, SIG_IGN);
1926 #endif
1927 }
1928 #endif /* HAVE_PTYS */
1929 \f
1930 #ifdef VMS
1931
1932 /* Assigning an input channel is done at the start of Emacs execution.
1933 This is called each time Emacs is resumed, also, but does nothing
1934 because input_chain is no longer zero. */
1935
1936 void
1937 init_vms_input ()
1938 {
1939 int status;
1940
1941 if (input_fd == 0)
1942 {
1943 status = SYS$ASSIGN (&input_dsc, &input_fd, 0, 0);
1944 if (! (status & 1))
1945 LIB$STOP (status);
1946 }
1947 }
1948
1949 /* Deassigning the input channel is done before exiting. */
1950
1951 void
1952 stop_vms_input ()
1953 {
1954 return SYS$DASSGN (input_fd);
1955 }
1956
1957 short input_buffer;
1958
1959 /* Request reading one character into the keyboard buffer.
1960 This is done as soon as the buffer becomes empty. */
1961
1962 void
1963 queue_kbd_input ()
1964 {
1965 int status;
1966 extern kbd_input_ast ();
1967
1968 waiting_for_ast = 0;
1969 stop_input = 0;
1970 status = SYS$QIO (0, input_fd, IO$_READVBLK,
1971 &input_iosb, kbd_input_ast, 1,
1972 &input_buffer, 1, 0, terminator_mask, 0, 0);
1973 }
1974
1975 int input_count;
1976
1977 /* Ast routine that is called when keyboard input comes in
1978 in accord with the SYS$QIO above. */
1979
1980 void
1981 kbd_input_ast ()
1982 {
1983 register int c = -1;
1984 int old_errno = errno;
1985 extern EMACS_TIME *input_available_clear_time;
1986
1987 if (waiting_for_ast)
1988 SYS$SETEF (input_ef);
1989 waiting_for_ast = 0;
1990 input_count++;
1991 #ifdef ASTDEBUG
1992 if (input_count == 25)
1993 exit (1);
1994 printf ("Ast # %d,", input_count);
1995 printf (" iosb = %x, %x, %x, %x",
1996 input_iosb.offset, input_iosb.status, input_iosb.termlen,
1997 input_iosb.term);
1998 #endif
1999 if (input_iosb.offset)
2000 {
2001 c = input_buffer;
2002 #ifdef ASTDEBUG
2003 printf (", char = 0%o", c);
2004 #endif
2005 }
2006 #ifdef ASTDEBUG
2007 printf ("\n");
2008 fflush (stdout);
2009 sleep (1);
2010 #endif
2011 if (! stop_input)
2012 queue_kbd_input ();
2013 if (c >= 0)
2014 {
2015 struct input_event e;
2016 EVENT_INIT (e);
2017
2018 e.kind = ASCII_KEYSTROKE_EVENT;
2019 XSETINT (e.code, c);
2020 e.frame_or_window = selected_frame;
2021 kbd_buffer_store_event (&e);
2022 }
2023 if (input_available_clear_time)
2024 EMACS_SET_SECS_USECS (*input_available_clear_time, 0, 0);
2025 errno = old_errno;
2026 }
2027
2028 /* Wait until there is something in kbd_buffer. */
2029
2030 void
2031 wait_for_kbd_input ()
2032 {
2033 extern int have_process_input, process_exited;
2034
2035 /* If already something, avoid doing system calls. */
2036 if (detect_input_pending ())
2037 {
2038 return;
2039 }
2040 /* Clear a flag, and tell ast routine above to set it. */
2041 SYS$CLREF (input_ef);
2042 waiting_for_ast = 1;
2043 /* Check for timing error: ast happened while we were doing that. */
2044 if (!detect_input_pending ())
2045 {
2046 /* No timing error: wait for flag to be set. */
2047 set_waiting_for_input (0);
2048 SYS$WFLOR (input_ef, input_eflist);
2049 clear_waiting_for_input ();
2050 if (!detect_input_pending ())
2051 /* Check for subprocess input availability */
2052 {
2053 int dsp = have_process_input || process_exited;
2054
2055 SYS$CLREF (process_ef);
2056 if (have_process_input)
2057 process_command_input ();
2058 if (process_exited)
2059 process_exit ();
2060 if (dsp)
2061 {
2062 update_mode_lines++;
2063 prepare_menu_bars ();
2064 redisplay_preserve_echo_area (18);
2065 }
2066 }
2067 }
2068 waiting_for_ast = 0;
2069 }
2070
2071 /* Get rid of any pending QIO, when we are about to suspend
2072 or when we want to throw away pending input.
2073 We wait for a positive sign that the AST routine has run
2074 and therefore there is no I/O request queued when we return.
2075 SYS$SETAST is used to avoid a timing error. */
2076
2077 void
2078 end_kbd_input ()
2079 {
2080 #ifdef ASTDEBUG
2081 printf ("At end_kbd_input.\n");
2082 fflush (stdout);
2083 sleep (1);
2084 #endif
2085 if (LIB$AST_IN_PROG ()) /* Don't wait if suspending from kbd_buffer_store_event! */
2086 {
2087 SYS$CANCEL (input_fd);
2088 return;
2089 }
2090
2091 SYS$SETAST (0);
2092 /* Clear a flag, and tell ast routine above to set it. */
2093 SYS$CLREF (input_ef);
2094 waiting_for_ast = 1;
2095 stop_input = 1;
2096 SYS$CANCEL (input_fd);
2097 SYS$SETAST (1);
2098 SYS$WAITFR (input_ef);
2099 waiting_for_ast = 0;
2100 }
2101
2102 /* Wait for either input available or time interval expiry. */
2103
2104 void
2105 input_wait_timeout (timeval)
2106 int timeval; /* Time to wait, in seconds */
2107 {
2108 int time [2];
2109 static int zero = 0;
2110 static int large = -10000000;
2111
2112 LIB$EMUL (&timeval, &large, &zero, time); /* Convert to VMS format */
2113
2114 /* If already something, avoid doing system calls. */
2115 if (detect_input_pending ())
2116 {
2117 return;
2118 }
2119 /* Clear a flag, and tell ast routine above to set it. */
2120 SYS$CLREF (input_ef);
2121 waiting_for_ast = 1;
2122 /* Check for timing error: ast happened while we were doing that. */
2123 if (!detect_input_pending ())
2124 {
2125 /* No timing error: wait for flag to be set. */
2126 SYS$CANTIM (1, 0);
2127 if (SYS$SETIMR (timer_ef, time, 0, 1) & 1) /* Set timer */
2128 SYS$WFLOR (timer_ef, timer_eflist); /* Wait for timer expiry or input */
2129 }
2130 waiting_for_ast = 0;
2131 }
2132
2133 /* The standard `sleep' routine works some other way
2134 and it stops working if you have ever quit out of it.
2135 This one continues to work. */
2136
2137 sys_sleep (timeval)
2138 int timeval;
2139 {
2140 int time [2];
2141 static int zero = 0;
2142 static int large = -10000000;
2143
2144 LIB$EMUL (&timeval, &large, &zero, time); /* Convert to VMS format */
2145
2146 SYS$CANTIM (1, 0);
2147 if (SYS$SETIMR (timer_ef, time, 0, 1) & 1) /* Set timer */
2148 SYS$WAITFR (timer_ef); /* Wait for timer expiry only */
2149 }
2150
2151 void
2152 init_sigio (fd)
2153 int fd;
2154 {
2155 request_sigio ();
2156 }
2157
2158 reset_sigio ()
2159 {
2160 unrequest_sigio ();
2161 }
2162
2163 void
2164 request_sigio ()
2165 {
2166 croak ("request sigio");
2167 }
2168
2169 void
2170 unrequest_sigio ()
2171 {
2172 croak ("unrequest sigio");
2173 }
2174
2175 #endif /* VMS */
2176 \f
2177 /* Note that VMS compiler won't accept defined (CANNOT_DUMP). */
2178 #ifndef CANNOT_DUMP
2179 #define NEED_STARTS
2180 #endif
2181
2182 #ifndef SYSTEM_MALLOC
2183 #ifndef NEED_STARTS
2184 #define NEED_STARTS
2185 #endif
2186 #endif
2187
2188 #ifdef NEED_STARTS
2189 /* Some systems that cannot dump also cannot implement these. */
2190
2191 /*
2192 * Return the address of the start of the text segment prior to
2193 * doing an unexec. After unexec the return value is undefined.
2194 * See crt0.c for further explanation and _start.
2195 *
2196 */
2197
2198 #if !(defined (__NetBSD__) && defined (__ELF__))
2199 #ifndef HAVE_TEXT_START
2200 char *
2201 start_of_text ()
2202 {
2203 #ifdef TEXT_START
2204 return ((char *) TEXT_START);
2205 #else
2206 #ifdef GOULD
2207 extern csrt ();
2208 return ((char *) csrt);
2209 #else /* not GOULD */
2210 extern int _start ();
2211 return ((char *) _start);
2212 #endif /* GOULD */
2213 #endif /* TEXT_START */
2214 }
2215 #endif /* not HAVE_TEXT_START */
2216 #endif
2217
2218 /*
2219 * Return the address of the start of the data segment prior to
2220 * doing an unexec. After unexec the return value is undefined.
2221 * See crt0.c for further information and definition of data_start.
2222 *
2223 * Apparently, on BSD systems this is etext at startup. On
2224 * USG systems (swapping) this is highly mmu dependent and
2225 * is also dependent on whether or not the program is running
2226 * with shared text. Generally there is a (possibly large)
2227 * gap between end of text and start of data with shared text.
2228 *
2229 * On Uniplus+ systems with shared text, data starts at a
2230 * fixed address. Each port (from a given oem) is generally
2231 * different, and the specific value of the start of data can
2232 * be obtained via the UniPlus+ specific "uvar" system call,
2233 * however the method outlined in crt0.c seems to be more portable.
2234 *
2235 * Probably what will have to happen when a USG unexec is available,
2236 * at least on UniPlus, is temacs will have to be made unshared so
2237 * that text and data are contiguous. Then once loadup is complete,
2238 * unexec will produce a shared executable where the data can be
2239 * at the normal shared text boundary and the startofdata variable
2240 * will be patched by unexec to the correct value.
2241 *
2242 */
2243
2244 #ifndef start_of_data
2245 char *
2246 start_of_data ()
2247 {
2248 #ifdef DATA_START
2249 return ((char *) DATA_START);
2250 #else
2251 #ifdef ORDINARY_LINK
2252 /*
2253 * This is a hack. Since we're not linking crt0.c or pre_crt0.c,
2254 * data_start isn't defined. We take the address of environ, which
2255 * is known to live at or near the start of the system crt0.c, and
2256 * we don't sweat the handful of bytes that might lose.
2257 */
2258 extern char **environ;
2259
2260 return ((char *) &environ);
2261 #else
2262 extern int data_start;
2263 return ((char *) &data_start);
2264 #endif /* ORDINARY_LINK */
2265 #endif /* DATA_START */
2266 }
2267 #endif /* start_of_data */
2268 #endif /* NEED_STARTS (not CANNOT_DUMP or not SYSTEM_MALLOC) */
2269 \f
2270 /* init_system_name sets up the string for the Lisp function
2271 system-name to return. */
2272
2273 #ifdef BSD4_1
2274 #include <whoami.h>
2275 #endif
2276
2277 extern Lisp_Object Vsystem_name;
2278
2279 #ifndef BSD4_1
2280 #ifndef VMS
2281 #ifdef HAVE_SOCKETS
2282 #include <sys/socket.h>
2283 #include <netdb.h>
2284 #endif /* HAVE_SOCKETS */
2285 #endif /* not VMS */
2286 #endif /* not BSD4_1 */
2287
2288 #ifdef TRY_AGAIN
2289 #ifndef HAVE_H_ERRNO
2290 extern int h_errno;
2291 #endif
2292 #endif /* TRY_AGAIN */
2293
2294 void
2295 init_system_name ()
2296 {
2297 #ifdef BSD4_1
2298 Vsystem_name = build_string (sysname);
2299 #else
2300 #ifdef VMS
2301 char *sp, *end;
2302 if ((sp = egetenv ("SYS$NODE")) == 0)
2303 Vsystem_name = build_string ("vax-vms");
2304 else if ((end = index (sp, ':')) == 0)
2305 Vsystem_name = build_string (sp);
2306 else
2307 Vsystem_name = make_string (sp, end - sp);
2308 #else
2309 #ifndef HAVE_GETHOSTNAME
2310 struct utsname uts;
2311 uname (&uts);
2312 Vsystem_name = build_string (uts.nodename);
2313 #else /* HAVE_GETHOSTNAME */
2314 unsigned int hostname_size = 256;
2315 char *hostname = (char *) alloca (hostname_size);
2316
2317 /* Try to get the host name; if the buffer is too short, try
2318 again. Apparently, the only indication gethostname gives of
2319 whether the buffer was large enough is the presence or absence
2320 of a '\0' in the string. Eech. */
2321 for (;;)
2322 {
2323 gethostname (hostname, hostname_size - 1);
2324 hostname[hostname_size - 1] = '\0';
2325
2326 /* Was the buffer large enough for the '\0'? */
2327 if (strlen (hostname) < hostname_size - 1)
2328 break;
2329
2330 hostname_size <<= 1;
2331 hostname = (char *) alloca (hostname_size);
2332 }
2333 #ifdef HAVE_SOCKETS
2334 /* Turn the hostname into the official, fully-qualified hostname.
2335 Don't do this if we're going to dump; this can confuse system
2336 libraries on some machines and make the dumped emacs core dump. */
2337 #ifndef CANNOT_DUMP
2338 if (initialized)
2339 #endif /* not CANNOT_DUMP */
2340 if (! index (hostname, '.'))
2341 {
2342 struct hostent *hp;
2343 int count;
2344 for (count = 0;; count++)
2345 {
2346 #ifdef TRY_AGAIN
2347 h_errno = 0;
2348 #endif
2349 hp = gethostbyname (hostname);
2350 #ifdef TRY_AGAIN
2351 if (! (hp == 0 && h_errno == TRY_AGAIN))
2352 #endif
2353 break;
2354 if (count >= 5)
2355 break;
2356 Fsleep_for (make_number (1), Qnil);
2357 }
2358 if (hp)
2359 {
2360 char *fqdn = (char *) hp->h_name;
2361 #if 0
2362 char *p;
2363 #endif
2364
2365 if (!index (fqdn, '.'))
2366 {
2367 /* We still don't have a fully qualified domain name.
2368 Try to find one in the list of alternate names */
2369 char **alias = hp->h_aliases;
2370 while (*alias && !index (*alias, '.'))
2371 alias++;
2372 if (*alias)
2373 fqdn = *alias;
2374 }
2375 hostname = fqdn;
2376 #if 0
2377 /* Convert the host name to lower case. */
2378 /* Using ctype.h here would introduce a possible locale
2379 dependence that is probably wrong for hostnames. */
2380 p = hostname;
2381 while (*p)
2382 {
2383 if (*p >= 'A' && *p <= 'Z')
2384 *p += 'a' - 'A';
2385 p++;
2386 }
2387 #endif
2388 }
2389 }
2390 #endif /* HAVE_SOCKETS */
2391 /* We used to try using getdomainname here,
2392 but NIIBE Yutaka <gniibe@etl.go.jp> says that
2393 getdomainname gets the NIS/YP domain which often is not the same
2394 as in Internet domain name. */
2395 #if 0 /* Turned off because sysinfo is not really likely to return the
2396 correct Internet domain. */
2397 #if (HAVE_SYSINFO && defined (SI_SRPC_DOMAIN))
2398 if (! index (hostname, '.'))
2399 {
2400 /* The hostname is not fully qualified. Append the domain name. */
2401
2402 int hostlen = strlen (hostname);
2403 int domain_size = 256;
2404
2405 for (;;)
2406 {
2407 char *domain = (char *) alloca (domain_size + 1);
2408 char *fqdn = (char *) alloca (hostlen + 1 + domain_size + 1);
2409 int sys_domain_size = sysinfo (SI_SRPC_DOMAIN, domain, domain_size);
2410 if (sys_domain_size <= 0)
2411 break;
2412 if (domain_size < sys_domain_size)
2413 {
2414 domain_size = sys_domain_size;
2415 continue;
2416 }
2417 strcpy (fqdn, hostname);
2418 if (domain[0] == '.')
2419 strcpy (fqdn + hostlen, domain);
2420 else if (domain[0] != 0)
2421 {
2422 fqdn[hostlen] = '.';
2423 strcpy (fqdn + hostlen + 1, domain);
2424 }
2425 hostname = fqdn;
2426 break;
2427 }
2428 }
2429 #endif /* HAVE_SYSINFO && defined (SI_SRPC_DOMAIN) */
2430 #endif /* 0 */
2431 Vsystem_name = build_string (hostname);
2432 #endif /* HAVE_GETHOSTNAME */
2433 #endif /* VMS */
2434 #endif /* BSD4_1 */
2435 {
2436 unsigned char *p;
2437 for (p = SDATA (Vsystem_name); *p; p++)
2438 if (*p == ' ' || *p == '\t')
2439 *p = '-';
2440 }
2441 }
2442 \f
2443 #ifndef MSDOS
2444 #ifndef VMS
2445 #if !defined (HAVE_SELECT) || defined (BROKEN_SELECT_NON_X)
2446
2447 #include "sysselect.h"
2448 #undef select
2449
2450 #if defined (HAVE_X_WINDOWS) && !defined (HAVE_SELECT)
2451 /* Cause explanatory error message at compile time,
2452 since the select emulation is not good enough for X. */
2453 int *x = &x_windows_lose_if_no_select_system_call;
2454 #endif
2455
2456 /* Emulate as much as select as is possible under 4.1 and needed by Gnu Emacs
2457 * Only checks read descriptors.
2458 */
2459 /* How long to wait between checking fds in select */
2460 #define SELECT_PAUSE 1
2461 int select_alarmed;
2462
2463 /* For longjmp'ing back to read_input_waiting. */
2464
2465 jmp_buf read_alarm_throw;
2466
2467 /* Nonzero if the alarm signal should throw back to read_input_waiting.
2468 The read_socket_hook function sets this to 1 while it is waiting. */
2469
2470 int read_alarm_should_throw;
2471
2472 SIGTYPE
2473 select_alarm ()
2474 {
2475 select_alarmed = 1;
2476 #ifdef BSD4_1
2477 sigrelse (SIGALRM);
2478 #else /* not BSD4_1 */
2479 signal (SIGALRM, SIG_IGN);
2480 #endif /* not BSD4_1 */
2481 SIGNAL_THREAD_CHECK (SIGALRM);
2482 if (read_alarm_should_throw)
2483 longjmp (read_alarm_throw, 1);
2484 }
2485
2486 #ifndef WINDOWSNT
2487 /* Only rfds are checked. */
2488 int
2489 sys_select (nfds, rfds, wfds, efds, timeout)
2490 int nfds;
2491 SELECT_TYPE *rfds, *wfds, *efds;
2492 EMACS_TIME *timeout;
2493 {
2494 int ravail = 0;
2495 SELECT_TYPE orfds;
2496 int timeoutval;
2497 int *local_timeout;
2498 extern int proc_buffered_char[];
2499 #ifndef subprocesses
2500 int process_tick = 0, update_tick = 0;
2501 #else
2502 extern int process_tick, update_tick;
2503 #endif
2504 unsigned char buf;
2505
2506 #if defined (HAVE_SELECT) && defined (HAVE_X_WINDOWS)
2507 /* If we're using X, then the native select will work; we only need the
2508 emulation for non-X usage. */
2509 if (!NILP (Vwindow_system))
2510 return select (nfds, rfds, wfds, efds, timeout);
2511 #endif
2512 timeoutval = timeout ? EMACS_SECS (*timeout) : 100000;
2513 local_timeout = &timeoutval;
2514 FD_ZERO (&orfds);
2515 if (rfds)
2516 {
2517 orfds = *rfds;
2518 FD_ZERO (rfds);
2519 }
2520 if (wfds)
2521 FD_ZERO (wfds);
2522 if (efds)
2523 FD_ZERO (efds);
2524
2525 /* If we are looking only for the terminal, with no timeout,
2526 just read it and wait -- that's more efficient. */
2527 if (*local_timeout == 100000 && process_tick == update_tick
2528 && FD_ISSET (0, &orfds))
2529 {
2530 int fd;
2531 for (fd = 1; fd < nfds; ++fd)
2532 if (FD_ISSET (fd, &orfds))
2533 goto hardway;
2534 if (! detect_input_pending ())
2535 read_input_waiting ();
2536 FD_SET (0, rfds);
2537 return 1;
2538 }
2539
2540 hardway:
2541 /* Once a second, till the timer expires, check all the flagged read
2542 * descriptors to see if any input is available. If there is some then
2543 * set the corresponding bit in the return copy of rfds.
2544 */
2545 while (1)
2546 {
2547 register int to_check, fd;
2548
2549 if (rfds)
2550 {
2551 for (to_check = nfds, fd = 0; --to_check >= 0; fd++)
2552 {
2553 if (FD_ISSET (fd, &orfds))
2554 {
2555 int avail = 0, status = 0;
2556
2557 if (fd == 0)
2558 avail = detect_input_pending (); /* Special keyboard handler */
2559 else
2560 {
2561 #ifdef FIONREAD
2562 status = ioctl (fd, FIONREAD, &avail);
2563 #else /* no FIONREAD */
2564 /* Hoping it will return -1 if nothing available
2565 or 0 if all 0 chars requested are read. */
2566 if (proc_buffered_char[fd] >= 0)
2567 avail = 1;
2568 else
2569 {
2570 avail = read (fd, &buf, 1);
2571 if (avail > 0)
2572 proc_buffered_char[fd] = buf;
2573 }
2574 #endif /* no FIONREAD */
2575 }
2576 if (status >= 0 && avail > 0)
2577 {
2578 FD_SET (fd, rfds);
2579 ravail++;
2580 }
2581 }
2582 }
2583 }
2584 if (*local_timeout == 0 || ravail != 0 || process_tick != update_tick)
2585 break;
2586
2587 turn_on_atimers (0);
2588 signal (SIGALRM, select_alarm);
2589 select_alarmed = 0;
2590 alarm (SELECT_PAUSE);
2591
2592 /* Wait for a SIGALRM (or maybe a SIGTINT) */
2593 while (select_alarmed == 0 && *local_timeout != 0
2594 && process_tick == update_tick)
2595 {
2596 /* If we are interested in terminal input,
2597 wait by reading the terminal.
2598 That makes instant wakeup for terminal input at least. */
2599 if (FD_ISSET (0, &orfds))
2600 {
2601 read_input_waiting ();
2602 if (detect_input_pending ())
2603 select_alarmed = 1;
2604 }
2605 else
2606 pause ();
2607 }
2608 (*local_timeout) -= SELECT_PAUSE;
2609
2610 /* Reset the old alarm if there was one. */
2611 turn_on_atimers (1);
2612
2613 if (*local_timeout == 0) /* Stop on timer being cleared */
2614 break;
2615 }
2616 return ravail;
2617 }
2618 #endif /* not WINDOWSNT */
2619
2620 /* Read keyboard input into the standard buffer,
2621 waiting for at least one character. */
2622
2623 void
2624 read_input_waiting ()
2625 {
2626 int nread, i;
2627 extern int quit_char;
2628
2629 if (read_socket_hook)
2630 {
2631 struct input_event hold_quit;
2632
2633 EVENT_INIT (hold_quit);
2634 hold_quit.kind = NO_EVENT;
2635
2636 read_alarm_should_throw = 0;
2637 if (! setjmp (read_alarm_throw))
2638 nread = (*read_socket_hook) (0, 1, &hold_quit);
2639 else
2640 nread = -1;
2641
2642 if (hold_quit.kind != NO_EVENT)
2643 kbd_buffer_store_event (&hold_quit);
2644 }
2645 else
2646 {
2647 struct input_event e;
2648 char buf[3];
2649 nread = read (fileno (stdin), buf, 1);
2650 EVENT_INIT (e);
2651
2652 /* Scan the chars for C-g and store them in kbd_buffer. */
2653 e.kind = ASCII_KEYSTROKE_EVENT;
2654 e.frame_or_window = selected_frame;
2655 e.modifiers = 0;
2656 for (i = 0; i < nread; i++)
2657 {
2658 /* Convert chars > 0177 to meta events if desired.
2659 We do this under the same conditions that read_avail_input does. */
2660 if (read_socket_hook == 0)
2661 {
2662 /* If the user says she has a meta key, then believe her. */
2663 if (meta_key == 1 && (buf[i] & 0x80))
2664 e.modifiers = meta_modifier;
2665 if (meta_key != 2)
2666 buf[i] &= ~0x80;
2667 }
2668
2669 XSETINT (e.code, buf[i]);
2670 kbd_buffer_store_event (&e);
2671 /* Don't look at input that follows a C-g too closely.
2672 This reduces lossage due to autorepeat on C-g. */
2673 if (buf[i] == quit_char)
2674 break;
2675 }
2676 }
2677 }
2678
2679 #endif /* not HAVE_SELECT */
2680 #endif /* not VMS */
2681 #endif /* not MSDOS */
2682 \f
2683 #ifdef BSD4_1
2684 void
2685 init_sigio (fd)
2686 int fd;
2687 {
2688 if (noninteractive)
2689 return;
2690 lmode = LINTRUP | lmode;
2691 ioctl (fd, TIOCLSET, &lmode);
2692 }
2693
2694 void
2695 reset_sigio ()
2696 {
2697 if (noninteractive)
2698 return;
2699 lmode = ~LINTRUP & lmode;
2700 ioctl (0, TIOCLSET, &lmode);
2701 }
2702
2703 void
2704 request_sigio ()
2705 {
2706 sigrelse (SIGTINT);
2707
2708 interrupts_deferred = 0;
2709 }
2710
2711 void
2712 unrequest_sigio ()
2713 {
2714 sighold (SIGTINT);
2715
2716 interrupts_deferred = 1;
2717 }
2718
2719 /* still inside #ifdef BSD4_1 */
2720 #ifdef subprocesses
2721
2722 int sigheld; /* Mask of held signals */
2723
2724 void
2725 sigholdx (signum)
2726 int signum;
2727 {
2728 sigheld |= sigbit (signum);
2729 sighold (signum);
2730 }
2731
2732 void
2733 sigisheld (signum)
2734 int signum;
2735 {
2736 sigheld |= sigbit (signum);
2737 }
2738
2739 void
2740 sigunhold (signum)
2741 int signum;
2742 {
2743 sigheld &= ~sigbit (signum);
2744 sigrelse (signum);
2745 }
2746
2747 void
2748 sigfree () /* Free all held signals */
2749 {
2750 int i;
2751 for (i = 0; i < NSIG; i++)
2752 if (sigheld & sigbit (i))
2753 sigrelse (i);
2754 sigheld = 0;
2755 }
2756
2757 int
2758 sigbit (i)
2759 {
2760 return 1 << (i - 1);
2761 }
2762 #endif /* subprocesses */
2763 #endif /* BSD4_1 */
2764 \f
2765 /* POSIX signals support - DJB */
2766 /* Anyone with POSIX signals should have ANSI C declarations */
2767
2768 #ifdef POSIX_SIGNALS
2769
2770 sigset_t empty_mask, full_mask;
2771
2772 signal_handler_t
2773 sys_signal (int signal_number, signal_handler_t action)
2774 {
2775 struct sigaction new_action, old_action;
2776 sigemptyset (&new_action.sa_mask);
2777 new_action.sa_handler = action;
2778 #if defined (SA_RESTART) && ! defined (BROKEN_SA_RESTART) && !defined(SYNC_INPUT)
2779 /* Emacs mostly works better with restartable system services. If this
2780 flag exists, we probably want to turn it on here.
2781 However, on some systems this resets the timeout of `select'
2782 which means that `select' never finishes if it keeps getting signals.
2783 BROKEN_SA_RESTART is defined on those systems. */
2784 /* It's not clear why the comment above says "mostly works better". --Stef
2785 When SYNC_INPUT is set, we don't want SA_RESTART because we need to poll
2786 for pending input so we need long-running syscalls to be interrupted
2787 after a signal that sets the interrupt_input_pending flag. */
2788 new_action.sa_flags = SA_RESTART;
2789 #else
2790 new_action.sa_flags = 0;
2791 #endif
2792 sigaction (signal_number, &new_action, &old_action);
2793 return (old_action.sa_handler);
2794 }
2795
2796 #ifndef __GNUC__
2797 /* If we're compiling with GCC, we don't need this function, since it
2798 can be written as a macro. */
2799 sigset_t
2800 sys_sigmask (int sig)
2801 {
2802 sigset_t mask;
2803 sigemptyset (&mask);
2804 sigaddset (&mask, sig);
2805 return mask;
2806 }
2807 #endif
2808
2809 /* I'd like to have these guys return pointers to the mask storage in here,
2810 but there'd be trouble if the code was saving multiple masks. I'll be
2811 safe and pass the structure. It normally won't be more than 2 bytes
2812 anyhow. - DJB */
2813
2814 sigset_t
2815 sys_sigblock (sigset_t new_mask)
2816 {
2817 sigset_t old_mask;
2818 sigprocmask (SIG_BLOCK, &new_mask, &old_mask);
2819 return (old_mask);
2820 }
2821
2822 sigset_t
2823 sys_sigunblock (sigset_t new_mask)
2824 {
2825 sigset_t old_mask;
2826 sigprocmask (SIG_UNBLOCK, &new_mask, &old_mask);
2827 return (old_mask);
2828 }
2829
2830 sigset_t
2831 sys_sigsetmask (sigset_t new_mask)
2832 {
2833 sigset_t old_mask;
2834 sigprocmask (SIG_SETMASK, &new_mask, &old_mask);
2835 return (old_mask);
2836 }
2837
2838 #endif /* POSIX_SIGNALS */
2839 \f
2840 #if !defined HAVE_STRSIGNAL && !HAVE_DECL_SYS_SIGLIST
2841 static char *my_sys_siglist[NSIG];
2842 # ifdef sys_siglist
2843 # undef sys_siglist
2844 # endif
2845 # define sys_siglist my_sys_siglist
2846 #endif
2847
2848 void
2849 init_signals ()
2850 {
2851 #ifdef POSIX_SIGNALS
2852 sigemptyset (&empty_mask);
2853 sigfillset (&full_mask);
2854 #endif
2855
2856 #if !defined HAVE_STRSIGNAL && !HAVE_DECL_SYS_SIGLIST
2857 if (! initialized)
2858 {
2859 # ifdef SIGABRT
2860 sys_siglist[SIGABRT] = "Aborted";
2861 # endif
2862 # ifdef SIGAIO
2863 sys_siglist[SIGAIO] = "LAN I/O interrupt";
2864 # endif
2865 # ifdef SIGALRM
2866 sys_siglist[SIGALRM] = "Alarm clock";
2867 # endif
2868 # ifdef SIGBUS
2869 sys_siglist[SIGBUS] = "Bus error";
2870 # endif
2871 # ifdef SIGCLD
2872 sys_siglist[SIGCLD] = "Child status changed";
2873 # endif
2874 # ifdef SIGCHLD
2875 sys_siglist[SIGCHLD] = "Child status changed";
2876 # endif
2877 # ifdef SIGCONT
2878 sys_siglist[SIGCONT] = "Continued";
2879 # endif
2880 # ifdef SIGDANGER
2881 sys_siglist[SIGDANGER] = "Swap space dangerously low";
2882 # endif
2883 # ifdef SIGDGNOTIFY
2884 sys_siglist[SIGDGNOTIFY] = "Notification message in queue";
2885 # endif
2886 # ifdef SIGEMT
2887 sys_siglist[SIGEMT] = "Emulation trap";
2888 # endif
2889 # ifdef SIGFPE
2890 sys_siglist[SIGFPE] = "Arithmetic exception";
2891 # endif
2892 # ifdef SIGFREEZE
2893 sys_siglist[SIGFREEZE] = "SIGFREEZE";
2894 # endif
2895 # ifdef SIGGRANT
2896 sys_siglist[SIGGRANT] = "Monitor mode granted";
2897 # endif
2898 # ifdef SIGHUP
2899 sys_siglist[SIGHUP] = "Hangup";
2900 # endif
2901 # ifdef SIGILL
2902 sys_siglist[SIGILL] = "Illegal instruction";
2903 # endif
2904 # ifdef SIGINT
2905 sys_siglist[SIGINT] = "Interrupt";
2906 # endif
2907 # ifdef SIGIO
2908 sys_siglist[SIGIO] = "I/O possible";
2909 # endif
2910 # ifdef SIGIOINT
2911 sys_siglist[SIGIOINT] = "I/O intervention required";
2912 # endif
2913 # ifdef SIGIOT
2914 sys_siglist[SIGIOT] = "IOT trap";
2915 # endif
2916 # ifdef SIGKILL
2917 sys_siglist[SIGKILL] = "Killed";
2918 # endif
2919 # ifdef SIGLOST
2920 sys_siglist[SIGLOST] = "Resource lost";
2921 # endif
2922 # ifdef SIGLWP
2923 sys_siglist[SIGLWP] = "SIGLWP";
2924 # endif
2925 # ifdef SIGMSG
2926 sys_siglist[SIGMSG] = "Monitor mode data available";
2927 # endif
2928 # ifdef SIGPHONE
2929 sys_siglist[SIGWIND] = "SIGPHONE";
2930 # endif
2931 # ifdef SIGPIPE
2932 sys_siglist[SIGPIPE] = "Broken pipe";
2933 # endif
2934 # ifdef SIGPOLL
2935 sys_siglist[SIGPOLL] = "Pollable event occurred";
2936 # endif
2937 # ifdef SIGPROF
2938 sys_siglist[SIGPROF] = "Profiling timer expired";
2939 # endif
2940 # ifdef SIGPTY
2941 sys_siglist[SIGPTY] = "PTY I/O interrupt";
2942 # endif
2943 # ifdef SIGPWR
2944 sys_siglist[SIGPWR] = "Power-fail restart";
2945 # endif
2946 # ifdef SIGQUIT
2947 sys_siglist[SIGQUIT] = "Quit";
2948 # endif
2949 # ifdef SIGRETRACT
2950 sys_siglist[SIGRETRACT] = "Need to relinguish monitor mode";
2951 # endif
2952 # ifdef SIGSAK
2953 sys_siglist[SIGSAK] = "Secure attention";
2954 # endif
2955 # ifdef SIGSEGV
2956 sys_siglist[SIGSEGV] = "Segmentation violation";
2957 # endif
2958 # ifdef SIGSOUND
2959 sys_siglist[SIGSOUND] = "Sound completed";
2960 # endif
2961 # ifdef SIGSTOP
2962 sys_siglist[SIGSTOP] = "Stopped (signal)";
2963 # endif
2964 # ifdef SIGSTP
2965 sys_siglist[SIGSTP] = "Stopped (user)";
2966 # endif
2967 # ifdef SIGSYS
2968 sys_siglist[SIGSYS] = "Bad argument to system call";
2969 # endif
2970 # ifdef SIGTERM
2971 sys_siglist[SIGTERM] = "Terminated";
2972 # endif
2973 # ifdef SIGTHAW
2974 sys_siglist[SIGTHAW] = "SIGTHAW";
2975 # endif
2976 # ifdef SIGTRAP
2977 sys_siglist[SIGTRAP] = "Trace/breakpoint trap";
2978 # endif
2979 # ifdef SIGTSTP
2980 sys_siglist[SIGTSTP] = "Stopped (user)";
2981 # endif
2982 # ifdef SIGTTIN
2983 sys_siglist[SIGTTIN] = "Stopped (tty input)";
2984 # endif
2985 # ifdef SIGTTOU
2986 sys_siglist[SIGTTOU] = "Stopped (tty output)";
2987 # endif
2988 # ifdef SIGURG
2989 sys_siglist[SIGURG] = "Urgent I/O condition";
2990 # endif
2991 # ifdef SIGUSR1
2992 sys_siglist[SIGUSR1] = "User defined signal 1";
2993 # endif
2994 # ifdef SIGUSR2
2995 sys_siglist[SIGUSR2] = "User defined signal 2";
2996 # endif
2997 # ifdef SIGVTALRM
2998 sys_siglist[SIGVTALRM] = "Virtual timer expired";
2999 # endif
3000 # ifdef SIGWAITING
3001 sys_siglist[SIGWAITING] = "Process's LWPs are blocked";
3002 # endif
3003 # ifdef SIGWINCH
3004 sys_siglist[SIGWINCH] = "Window size changed";
3005 # endif
3006 # ifdef SIGWIND
3007 sys_siglist[SIGWIND] = "SIGWIND";
3008 # endif
3009 # ifdef SIGXCPU
3010 sys_siglist[SIGXCPU] = "CPU time limit exceeded";
3011 # endif
3012 # ifdef SIGXFSZ
3013 sys_siglist[SIGXFSZ] = "File size limit exceeded";
3014 # endif
3015 }
3016 #endif /* !defined HAVE_STRSIGNAL && !defined HAVE_DECL_SYS_SIGLIST */
3017 }
3018 \f
3019 #ifndef HAVE_RANDOM
3020 #ifdef random
3021 #define HAVE_RANDOM
3022 #endif
3023 #endif
3024
3025 /* Figure out how many bits the system's random number generator uses.
3026 `random' and `lrand48' are assumed to return 31 usable bits.
3027 BSD `rand' returns a 31 bit value but the low order bits are unusable;
3028 so we'll shift it and treat it like the 15-bit USG `rand'. */
3029
3030 #ifndef RAND_BITS
3031 # ifdef HAVE_RANDOM
3032 # define RAND_BITS 31
3033 # else /* !HAVE_RANDOM */
3034 # ifdef HAVE_LRAND48
3035 # define RAND_BITS 31
3036 # define random lrand48
3037 # else /* !HAVE_LRAND48 */
3038 # define RAND_BITS 15
3039 # if RAND_MAX == 32767
3040 # define random rand
3041 # else /* RAND_MAX != 32767 */
3042 # if RAND_MAX == 2147483647
3043 # define random() (rand () >> 16)
3044 # else /* RAND_MAX != 2147483647 */
3045 # ifdef USG
3046 # define random rand
3047 # else
3048 # define random() (rand () >> 16)
3049 # endif /* !USG */
3050 # endif /* RAND_MAX != 2147483647 */
3051 # endif /* RAND_MAX != 32767 */
3052 # endif /* !HAVE_LRAND48 */
3053 # endif /* !HAVE_RANDOM */
3054 #endif /* !RAND_BITS */
3055
3056 void
3057 seed_random (arg)
3058 long arg;
3059 {
3060 #ifdef HAVE_RANDOM
3061 srandom ((unsigned int)arg);
3062 #else
3063 # ifdef HAVE_LRAND48
3064 srand48 (arg);
3065 # else
3066 srand ((unsigned int)arg);
3067 # endif
3068 #endif
3069 }
3070
3071 /*
3072 * Build a full Emacs-sized word out of whatever we've got.
3073 * This suffices even for a 64-bit architecture with a 15-bit rand.
3074 */
3075 long
3076 get_random ()
3077 {
3078 long val = random ();
3079 #if VALBITS > RAND_BITS
3080 val = (val << RAND_BITS) ^ random ();
3081 #if VALBITS > 2*RAND_BITS
3082 val = (val << RAND_BITS) ^ random ();
3083 #if VALBITS > 3*RAND_BITS
3084 val = (val << RAND_BITS) ^ random ();
3085 #if VALBITS > 4*RAND_BITS
3086 val = (val << RAND_BITS) ^ random ();
3087 #endif /* need at least 5 */
3088 #endif /* need at least 4 */
3089 #endif /* need at least 3 */
3090 #endif /* need at least 2 */
3091 return val & ((1L << VALBITS) - 1);
3092 }
3093 \f
3094 #ifdef WRONG_NAME_INSQUE
3095
3096 insque (q,p)
3097 caddr_t q,p;
3098 {
3099 _insque (q,p);
3100 }
3101
3102 #endif
3103 \f
3104 #ifdef VMS
3105
3106 #ifdef getenv
3107 /* If any place else asks for the TERM variable,
3108 allow it to be overridden with the EMACS_TERM variable
3109 before attempting to translate the logical name TERM. As a last
3110 resort, ask for VAX C's special idea of the TERM variable. */
3111 #undef getenv
3112 char *
3113 sys_getenv (name)
3114 char *name;
3115 {
3116 register char *val;
3117 static char buf[256];
3118 static struct dsc$descriptor_s equiv
3119 = {sizeof (buf), DSC$K_DTYPE_T, DSC$K_CLASS_S, buf};
3120 static struct dsc$descriptor_s d_name
3121 = {0, DSC$K_DTYPE_T, DSC$K_CLASS_S, 0};
3122 short eqlen;
3123
3124 if (!strcmp (name, "TERM"))
3125 {
3126 val = (char *) getenv ("EMACS_TERM");
3127 if (val)
3128 return val;
3129 }
3130
3131 d_name.dsc$w_length = strlen (name);
3132 d_name.dsc$a_pointer = name;
3133 if (LIB$SYS_TRNLOG (&d_name, &eqlen, &equiv) == 1)
3134 {
3135 char *str = (char *) xmalloc (eqlen + 1);
3136 bcopy (buf, str, eqlen);
3137 str[eqlen] = '\0';
3138 /* This is a storage leak, but a pain to fix. With luck,
3139 no one will ever notice. */
3140 return str;
3141 }
3142 return (char *) getenv (name);
3143 }
3144 #endif /* getenv */
3145
3146 #ifdef abort
3147 /* Since VMS doesn't believe in core dumps, the only way to debug this beast is
3148 to force a call on the debugger from within the image. */
3149 #undef abort
3150 sys_abort ()
3151 {
3152 reset_sys_modes ();
3153 LIB$SIGNAL (SS$_DEBUG);
3154 }
3155 #endif /* abort */
3156 #endif /* VMS */
3157 \f
3158 #ifdef VMS
3159 #ifdef LINK_CRTL_SHARE
3160 #ifdef SHARABLE_LIB_BUG
3161 /* Variables declared noshare and initialized in sharable libraries
3162 cannot be shared. The VMS linker incorrectly forces you to use a private
3163 version which is uninitialized... If not for this "feature", we
3164 could use the C library definition of sys_nerr and sys_errlist. */
3165 int sys_nerr = 35;
3166 char *sys_errlist[] =
3167 {
3168 "error 0",
3169 "not owner",
3170 "no such file or directory",
3171 "no such process",
3172 "interrupted system call",
3173 "i/o error",
3174 "no such device or address",
3175 "argument list too long",
3176 "exec format error",
3177 "bad file number",
3178 "no child process",
3179 "no more processes",
3180 "not enough memory",
3181 "permission denied",
3182 "bad address",
3183 "block device required",
3184 "mount devices busy",
3185 "file exists",
3186 "cross-device link",
3187 "no such device",
3188 "not a directory",
3189 "is a directory",
3190 "invalid argument",
3191 "file table overflow",
3192 "too many open files",
3193 "not a typewriter",
3194 "text file busy",
3195 "file too big",
3196 "no space left on device",
3197 "illegal seek",
3198 "read-only file system",
3199 "too many links",
3200 "broken pipe",
3201 "math argument",
3202 "result too large",
3203 "I/O stream empty",
3204 "vax/vms specific error code nontranslatable error"
3205 };
3206 #endif /* SHARABLE_LIB_BUG */
3207 #endif /* LINK_CRTL_SHARE */
3208 #endif /* VMS */
3209
3210 #ifndef HAVE_STRERROR
3211 #ifndef WINDOWSNT
3212 char *
3213 strerror (errnum)
3214 int errnum;
3215 {
3216 extern char *sys_errlist[];
3217 extern int sys_nerr;
3218
3219 if (errnum >= 0 && errnum < sys_nerr)
3220 return sys_errlist[errnum];
3221 return (char *) "Unknown error";
3222 }
3223 #endif /* not WINDOWSNT */
3224 #endif /* ! HAVE_STRERROR */
3225 \f
3226 int
3227 emacs_open (path, oflag, mode)
3228 const char *path;
3229 int oflag, mode;
3230 {
3231 register int rtnval;
3232
3233 #ifdef BSD4_1
3234 if (oflag & O_CREAT)
3235 return creat (path, mode);
3236 #endif
3237
3238 while ((rtnval = open (path, oflag, mode)) == -1
3239 && (errno == EINTR))
3240 QUIT;
3241 return (rtnval);
3242 }
3243
3244 int
3245 emacs_close (fd)
3246 int fd;
3247 {
3248 int did_retry = 0;
3249 register int rtnval;
3250
3251 while ((rtnval = close (fd)) == -1
3252 && (errno == EINTR))
3253 did_retry = 1;
3254
3255 /* If close is interrupted SunOS 4.1 may or may not have closed the
3256 file descriptor. If it did the second close will fail with
3257 errno = EBADF. That means we have succeeded. */
3258 if (rtnval == -1 && did_retry && errno == EBADF)
3259 return 0;
3260
3261 return rtnval;
3262 }
3263
3264 int
3265 emacs_read (fildes, buf, nbyte)
3266 int fildes;
3267 char *buf;
3268 unsigned int nbyte;
3269 {
3270 register int rtnval;
3271
3272 while ((rtnval = read (fildes, buf, nbyte)) == -1
3273 && (errno == EINTR))
3274 QUIT;
3275 return (rtnval);
3276 }
3277
3278 int
3279 emacs_write (fildes, buf, nbyte)
3280 int fildes;
3281 const char *buf;
3282 unsigned int nbyte;
3283 {
3284 register int rtnval, bytes_written;
3285
3286 bytes_written = 0;
3287
3288 while (nbyte > 0)
3289 {
3290 rtnval = write (fildes, buf, nbyte);
3291
3292 if (rtnval == -1)
3293 {
3294 if (errno == EINTR)
3295 {
3296 #ifdef SYNC_INPUT
3297 /* I originally used `QUIT' but that might causes files to
3298 be truncated if you hit C-g in the middle of it. --Stef */
3299 if (interrupt_input_pending)
3300 handle_async_input ();
3301 #endif
3302 continue;
3303 }
3304 else
3305 return (bytes_written ? bytes_written : -1);
3306 }
3307
3308 buf += rtnval;
3309 nbyte -= rtnval;
3310 bytes_written += rtnval;
3311 }
3312 return (bytes_written);
3313 }
3314 \f
3315 #ifdef USG
3316 /*
3317 * All of the following are for USG.
3318 *
3319 * On USG systems the system calls are INTERRUPTIBLE by signals
3320 * that the user program has elected to catch. Thus the system call
3321 * must be retried in these cases. To handle this without massive
3322 * changes in the source code, we remap the standard system call names
3323 * to names for our own functions in sysdep.c that do the system call
3324 * with retries. Actually, for portability reasons, it is good
3325 * programming practice, as this example shows, to limit all actual
3326 * system calls to a single occurrence in the source. Sure, this
3327 * adds an extra level of function call overhead but it is almost
3328 * always negligible. Fred Fish, Unisoft Systems Inc.
3329 */
3330
3331 /*
3332 * Warning, this function may not duplicate 4.2 action properly
3333 * under error conditions.
3334 */
3335
3336 #ifndef MAXPATHLEN
3337 /* In 4.1, param.h fails to define this. */
3338 #define MAXPATHLEN 1024
3339 #endif
3340
3341 #ifndef HAVE_GETWD
3342
3343 char *
3344 getwd (pathname)
3345 char *pathname;
3346 {
3347 char *npath, *spath;
3348 extern char *getcwd ();
3349
3350 BLOCK_INPUT; /* getcwd uses malloc */
3351 spath = npath = getcwd ((char *) 0, MAXPATHLEN);
3352 if (spath == 0)
3353 {
3354 UNBLOCK_INPUT;
3355 return spath;
3356 }
3357 /* On Altos 3068, getcwd can return @hostname/dir, so discard
3358 up to first slash. Should be harmless on other systems. */
3359 while (*npath && *npath != '/')
3360 npath++;
3361 strcpy (pathname, npath);
3362 free (spath); /* getcwd uses malloc */
3363 UNBLOCK_INPUT;
3364 return pathname;
3365 }
3366
3367 #endif /* HAVE_GETWD */
3368
3369 /*
3370 * Emulate rename using unlink/link. Note that this is
3371 * only partially correct. Also, doesn't enforce restriction
3372 * that files be of same type (regular->regular, dir->dir, etc).
3373 */
3374
3375 #ifndef HAVE_RENAME
3376
3377 rename (from, to)
3378 const char *from;
3379 const char *to;
3380 {
3381 if (access (from, 0) == 0)
3382 {
3383 unlink (to);
3384 if (link (from, to) == 0)
3385 if (unlink (from) == 0)
3386 return (0);
3387 }
3388 return (-1);
3389 }
3390
3391 #endif
3392
3393
3394 #ifdef HPUX
3395 #ifndef HAVE_PERROR
3396
3397 /* HPUX curses library references perror, but as far as we know
3398 it won't be called. Anyway this definition will do for now. */
3399
3400 perror ()
3401 {
3402 }
3403
3404 #endif /* not HAVE_PERROR */
3405 #endif /* HPUX */
3406
3407 #ifndef HAVE_DUP2
3408
3409 /*
3410 * Emulate BSD dup2. First close newd if it already exists.
3411 * Then, attempt to dup oldd. If not successful, call dup2 recursively
3412 * until we are, then close the unsuccessful ones.
3413 */
3414
3415 dup2 (oldd, newd)
3416 int oldd;
3417 int newd;
3418 {
3419 register int fd, ret;
3420
3421 emacs_close (newd);
3422
3423 #ifdef F_DUPFD
3424 return fcntl (oldd, F_DUPFD, newd);
3425 #else
3426 fd = dup (old);
3427 if (fd == -1)
3428 return -1;
3429 if (fd == new)
3430 return new;
3431 ret = dup2 (old,new);
3432 emacs_close (fd);
3433 return ret;
3434 #endif
3435 }
3436
3437 #endif /* not HAVE_DUP2 */
3438
3439 /*
3440 * Gettimeofday. Simulate as much as possible. Only accurate
3441 * to nearest second. Emacs doesn't use tzp so ignore it for now.
3442 * Only needed when subprocesses are defined.
3443 */
3444
3445 #ifdef subprocesses
3446 #ifndef VMS
3447 #ifndef HAVE_GETTIMEOFDAY
3448 #ifdef HAVE_TIMEVAL
3449
3450 /* ARGSUSED */
3451 int
3452 gettimeofday (tp, tzp)
3453 struct timeval *tp;
3454 struct timezone *tzp;
3455 {
3456 extern long time ();
3457
3458 tp->tv_sec = time ((long *)0);
3459 tp->tv_usec = 0;
3460 if (tzp != 0)
3461 tzp->tz_minuteswest = -1;
3462 return 0;
3463 }
3464
3465 #endif
3466 #endif
3467 #endif
3468 #endif /* subprocess && !HAVE_GETTIMEOFDAY && HAVE_TIMEVAL && !VMS */
3469
3470 /*
3471 * This function will go away as soon as all the stubs fixed. (fnf)
3472 */
3473
3474 void
3475 croak (badfunc)
3476 char *badfunc;
3477 {
3478 printf ("%s not yet implemented\r\n", badfunc);
3479 reset_sys_modes ();
3480 exit (1);
3481 }
3482
3483 #endif /* USG */
3484 \f
3485 /* Directory routines for systems that don't have them. */
3486
3487 #ifdef SYSV_SYSTEM_DIR
3488
3489 #include <dirent.h>
3490
3491 #if defined (BROKEN_CLOSEDIR) || !defined (HAVE_CLOSEDIR)
3492
3493 int
3494 closedir (dirp)
3495 register DIR *dirp; /* stream from opendir */
3496 {
3497 int rtnval;
3498
3499 rtnval = emacs_close (dirp->dd_fd);
3500
3501 /* Some systems (like Solaris) allocate the buffer and the DIR all
3502 in one block. Why in the world are we freeing this ourselves
3503 anyway? */
3504 #if ! (defined (sun) && defined (USG5_4))
3505 xfree ((char *) dirp->dd_buf); /* directory block defined in <dirent.h> */
3506 #endif
3507 xfree ((char *) dirp);
3508
3509 return rtnval;
3510 }
3511 #endif /* BROKEN_CLOSEDIR or not HAVE_CLOSEDIR */
3512 #endif /* SYSV_SYSTEM_DIR */
3513
3514 #ifdef NONSYSTEM_DIR_LIBRARY
3515
3516 DIR *
3517 opendir (filename)
3518 char *filename; /* name of directory */
3519 {
3520 register DIR *dirp; /* -> malloc'ed storage */
3521 register int fd; /* file descriptor for read */
3522 struct stat sbuf; /* result of fstat */
3523
3524 fd = emacs_open (filename, O_RDONLY, 0);
3525 if (fd < 0)
3526 return 0;
3527
3528 BLOCK_INPUT;
3529 if (fstat (fd, &sbuf) < 0
3530 || (sbuf.st_mode & S_IFMT) != S_IFDIR
3531 || (dirp = (DIR *) xmalloc (sizeof (DIR))) == 0)
3532 {
3533 emacs_close (fd);
3534 UNBLOCK_INPUT;
3535 return 0; /* bad luck today */
3536 }
3537 UNBLOCK_INPUT;
3538
3539 dirp->dd_fd = fd;
3540 dirp->dd_loc = dirp->dd_size = 0; /* refill needed */
3541
3542 return dirp;
3543 }
3544
3545 void
3546 closedir (dirp)
3547 register DIR *dirp; /* stream from opendir */
3548 {
3549 emacs_close (dirp->dd_fd);
3550 xfree ((char *) dirp);
3551 }
3552
3553
3554 #ifndef VMS
3555 #define DIRSIZ 14
3556 struct olddir
3557 {
3558 ino_t od_ino; /* inode */
3559 char od_name[DIRSIZ]; /* filename */
3560 };
3561 #endif /* not VMS */
3562
3563 struct direct dir_static; /* simulated directory contents */
3564
3565 /* ARGUSED */
3566 struct direct *
3567 readdir (dirp)
3568 register DIR *dirp; /* stream from opendir */
3569 {
3570 #ifndef VMS
3571 register struct olddir *dp; /* -> directory data */
3572 #else /* VMS */
3573 register struct dir$_name *dp; /* -> directory data */
3574 register struct dir$_version *dv; /* -> version data */
3575 #endif /* VMS */
3576
3577 for (; ;)
3578 {
3579 if (dirp->dd_loc >= dirp->dd_size)
3580 dirp->dd_loc = dirp->dd_size = 0;
3581
3582 if (dirp->dd_size == 0 /* refill buffer */
3583 && (dirp->dd_size = emacs_read (dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ)) <= 0)
3584 return 0;
3585
3586 #ifndef VMS
3587 dp = (struct olddir *) &dirp->dd_buf[dirp->dd_loc];
3588 dirp->dd_loc += sizeof (struct olddir);
3589
3590 if (dp->od_ino != 0) /* not deleted entry */
3591 {
3592 dir_static.d_ino = dp->od_ino;
3593 strncpy (dir_static.d_name, dp->od_name, DIRSIZ);
3594 dir_static.d_name[DIRSIZ] = '\0';
3595 dir_static.d_namlen = strlen (dir_static.d_name);
3596 dir_static.d_reclen = sizeof (struct direct)
3597 - MAXNAMLEN + 3
3598 + dir_static.d_namlen - dir_static.d_namlen % 4;
3599 return &dir_static; /* -> simulated structure */
3600 }
3601 #else /* VMS */
3602 dp = (struct dir$_name *) dirp->dd_buf;
3603 if (dirp->dd_loc == 0)
3604 dirp->dd_loc = (dp->dir$b_namecount&1) ? dp->dir$b_namecount + 1
3605 : dp->dir$b_namecount;
3606 dv = (struct dir$_version *)&dp->dir$t_name[dirp->dd_loc];
3607 dir_static.d_ino = dv->dir$w_fid_num;
3608 dir_static.d_namlen = dp->dir$b_namecount;
3609 dir_static.d_reclen = sizeof (struct direct)
3610 - MAXNAMLEN + 3
3611 + dir_static.d_namlen - dir_static.d_namlen % 4;
3612 strncpy (dir_static.d_name, dp->dir$t_name, dp->dir$b_namecount);
3613 dir_static.d_name[dir_static.d_namlen] = '\0';
3614 dirp->dd_loc = dirp->dd_size; /* only one record at a time */
3615 return &dir_static;
3616 #endif /* VMS */
3617 }
3618 }
3619
3620 #ifdef VMS
3621 /* readdirver is just like readdir except it returns all versions of a file
3622 as separate entries. */
3623
3624 /* ARGUSED */
3625 struct direct *
3626 readdirver (dirp)
3627 register DIR *dirp; /* stream from opendir */
3628 {
3629 register struct dir$_name *dp; /* -> directory data */
3630 register struct dir$_version *dv; /* -> version data */
3631
3632 if (dirp->dd_loc >= dirp->dd_size - sizeof (struct dir$_name))
3633 dirp->dd_loc = dirp->dd_size = 0;
3634
3635 if (dirp->dd_size == 0 /* refill buffer */
3636 && (dirp->dd_size = sys_read (dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ)) <= 0)
3637 return 0;
3638
3639 dp = (struct dir$_name *) dirp->dd_buf;
3640 if (dirp->dd_loc == 0)
3641 dirp->dd_loc = (dp->dir$b_namecount & 1) ? dp->dir$b_namecount + 1
3642 : dp->dir$b_namecount;
3643 dv = (struct dir$_version *) &dp->dir$t_name[dirp->dd_loc];
3644 strncpy (dir_static.d_name, dp->dir$t_name, dp->dir$b_namecount);
3645 sprintf (&dir_static.d_name[dp->dir$b_namecount], ";%d", dv->dir$w_version);
3646 dir_static.d_namlen = strlen (dir_static.d_name);
3647 dir_static.d_ino = dv->dir$w_fid_num;
3648 dir_static.d_reclen = sizeof (struct direct) - MAXNAMLEN + 3
3649 + dir_static.d_namlen - dir_static.d_namlen % 4;
3650 dirp->dd_loc = ((char *) (++dv) - dp->dir$t_name);
3651 return &dir_static;
3652 }
3653
3654 #endif /* VMS */
3655
3656 #endif /* NONSYSTEM_DIR_LIBRARY */
3657
3658 \f
3659 int
3660 set_file_times (filename, atime, mtime)
3661 const char *filename;
3662 EMACS_TIME atime, mtime;
3663 {
3664 #ifdef HAVE_UTIMES
3665 struct timeval tv[2];
3666 tv[0] = atime;
3667 tv[1] = mtime;
3668 return utimes (filename, tv);
3669 #else /* not HAVE_UTIMES */
3670 struct utimbuf utb;
3671 utb.actime = EMACS_SECS (atime);
3672 utb.modtime = EMACS_SECS (mtime);
3673 return utime (filename, &utb);
3674 #endif /* not HAVE_UTIMES */
3675 }
3676 \f
3677 /* mkdir and rmdir functions, for systems which don't have them. */
3678
3679 #ifndef HAVE_MKDIR
3680 /*
3681 * Written by Robert Rother, Mariah Corporation, August 1985.
3682 *
3683 * If you want it, it's yours. All I ask in return is that if you
3684 * figure out how to do this in a Bourne Shell script you send me
3685 * a copy.
3686 * sdcsvax!rmr or rmr@uscd
3687 *
3688 * Severely hacked over by John Gilmore to make a 4.2BSD compatible
3689 * subroutine. 11Mar86; hoptoad!gnu
3690 *
3691 * Modified by rmtodd@uokmax 6-28-87 -- when making an already existing dir,
3692 * subroutine didn't return EEXIST. It does now.
3693 */
3694
3695 /*
3696 * Make a directory.
3697 */
3698 #ifdef MKDIR_PROTOTYPE
3699 MKDIR_PROTOTYPE
3700 #else
3701 int
3702 mkdir (dpath, dmode)
3703 char *dpath;
3704 int dmode;
3705 #endif
3706 {
3707 int cpid, status, fd;
3708 struct stat statbuf;
3709
3710 if (stat (dpath, &statbuf) == 0)
3711 {
3712 errno = EEXIST; /* Stat worked, so it already exists */
3713 return -1;
3714 }
3715
3716 /* If stat fails for a reason other than non-existence, return error */
3717 if (errno != ENOENT)
3718 return -1;
3719
3720 synch_process_alive = 1;
3721 switch (cpid = fork ())
3722 {
3723
3724 case -1: /* Error in fork */
3725 return (-1); /* Errno is set already */
3726
3727 case 0: /* Child process */
3728 /*
3729 * Cheap hack to set mode of new directory. Since this
3730 * child process is going away anyway, we zap its umask.
3731 * FIXME, this won't suffice to set SUID, SGID, etc. on this
3732 * directory. Does anybody care?
3733 */
3734 status = umask (0); /* Get current umask */
3735 status = umask (status | (0777 & ~dmode)); /* Set for mkdir */
3736 fd = emacs_open ("/dev/null", O_RDWR, 0);
3737 if (fd >= 0)
3738 {
3739 dup2 (fd, 0);
3740 dup2 (fd, 1);
3741 dup2 (fd, 2);
3742 }
3743 execl ("/bin/mkdir", "mkdir", dpath, (char *) 0);
3744 _exit (-1); /* Can't exec /bin/mkdir */
3745
3746 default: /* Parent process */
3747 wait_for_termination (cpid);
3748 }
3749
3750 if (synch_process_death != 0 || synch_process_retcode != 0
3751 || synch_process_termsig != 0)
3752 {
3753 errno = EIO; /* We don't know why, but */
3754 return -1; /* /bin/mkdir failed */
3755 }
3756
3757 return 0;
3758 }
3759 #endif /* not HAVE_MKDIR */
3760
3761 #ifndef HAVE_RMDIR
3762 int
3763 rmdir (dpath)
3764 char *dpath;
3765 {
3766 int cpid, status, fd;
3767 struct stat statbuf;
3768
3769 if (stat (dpath, &statbuf) != 0)
3770 {
3771 /* Stat just set errno. We don't have to */
3772 return -1;
3773 }
3774
3775 synch_process_alive = 1;
3776 switch (cpid = fork ())
3777 {
3778
3779 case -1: /* Error in fork */
3780 return (-1); /* Errno is set already */
3781
3782 case 0: /* Child process */
3783 fd = emacs_open ("/dev/null", O_RDWR, 0);
3784 if (fd >= 0)
3785 {
3786 dup2 (fd, 0);
3787 dup2 (fd, 1);
3788 dup2 (fd, 2);
3789 }
3790 execl ("/bin/rmdir", "rmdir", dpath, (char *) 0);
3791 _exit (-1); /* Can't exec /bin/rmdir */
3792
3793 default: /* Parent process */
3794 wait_for_termination (cpid);
3795 }
3796
3797 if (synch_process_death != 0 || synch_process_retcode != 0
3798 || synch_process_termsig != 0)
3799 {
3800 errno = EIO; /* We don't know why, but */
3801 return -1; /* /bin/rmdir failed */
3802 }
3803
3804 return 0;
3805 }
3806 #endif /* !HAVE_RMDIR */
3807
3808
3809 \f
3810 /* Functions for VMS */
3811 #ifdef VMS
3812 #include <acldef.h>
3813 #include <chpdef.h>
3814 #include <jpidef.h>
3815
3816 /* Return as a string the VMS error string pertaining to STATUS.
3817 Reuses the same static buffer each time it is called. */
3818
3819 char *
3820 vmserrstr (status)
3821 int status; /* VMS status code */
3822 {
3823 int bufadr[2];
3824 short len;
3825 static char buf[257];
3826
3827 bufadr[0] = sizeof buf - 1;
3828 bufadr[1] = (int) buf;
3829 if (! (SYS$GETMSG (status, &len, bufadr, 0x1, 0) & 1))
3830 return "untranslatable VMS error status";
3831 buf[len] = '\0';
3832 return buf;
3833 }
3834
3835 #ifdef access
3836 #undef access
3837
3838 /* The following is necessary because 'access' emulation by VMS C (2.0) does
3839 * not work correctly. (It also doesn't work well in version 2.3.)
3840 */
3841
3842 #ifdef VMS4_4
3843
3844 #define DESCRIPTOR(name,string) struct dsc$descriptor_s name = \
3845 { strlen (string), DSC$K_DTYPE_T, DSC$K_CLASS_S, string }
3846
3847 typedef union {
3848 struct {
3849 unsigned short s_buflen;
3850 unsigned short s_code;
3851 char *s_bufadr;
3852 unsigned short *s_retlenadr;
3853 } s;
3854 int end;
3855 } item;
3856 #define buflen s.s_buflen
3857 #define code s.s_code
3858 #define bufadr s.s_bufadr
3859 #define retlenadr s.s_retlenadr
3860
3861 #define R_OK 4 /* test for read permission */
3862 #define W_OK 2 /* test for write permission */
3863 #define X_OK 1 /* test for execute (search) permission */
3864 #define F_OK 0 /* test for presence of file */
3865
3866 int
3867 sys_access (path, mode)
3868 char *path;
3869 int mode;
3870 {
3871 static char *user = NULL;
3872 char dir_fn[512];
3873
3874 /* translate possible directory spec into .DIR file name, so brain-dead
3875 * access can treat the directory like a file. */
3876 if (directory_file_name (path, dir_fn))
3877 path = dir_fn;
3878
3879 if (mode == F_OK)
3880 return access (path, mode);
3881 if (user == NULL && (user = (char *) getenv ("USER")) == NULL)
3882 return -1;
3883 {
3884 int stat;
3885 int flags;
3886 int acces;
3887 unsigned short int dummy;
3888 item itemlst[3];
3889 static int constant = ACL$C_FILE;
3890 DESCRIPTOR (path_desc, path);
3891 DESCRIPTOR (user_desc, user);
3892
3893 flags = 0;
3894 acces = 0;
3895 if ((mode & X_OK) && ((stat = access (path, mode)) < 0 || mode == X_OK))
3896 return stat;
3897 if (mode & R_OK)
3898 acces |= CHP$M_READ;
3899 if (mode & W_OK)
3900 acces |= CHP$M_WRITE;
3901 itemlst[0].buflen = sizeof (int);
3902 itemlst[0].code = CHP$_FLAGS;
3903 itemlst[0].bufadr = (char *) &flags;
3904 itemlst[0].retlenadr = &dummy;
3905 itemlst[1].buflen = sizeof (int);
3906 itemlst[1].code = CHP$_ACCESS;
3907 itemlst[1].bufadr = (char *) &acces;
3908 itemlst[1].retlenadr = &dummy;
3909 itemlst[2].end = CHP$_END;
3910 stat = SYS$CHECK_ACCESS (&constant, &path_desc, &user_desc, itemlst);
3911 return stat == SS$_NORMAL ? 0 : -1;
3912 }
3913 }
3914
3915 #else /* not VMS4_4 */
3916
3917 #include <prvdef.h>
3918 #define ACE$M_WRITE 2
3919 #define ACE$C_KEYID 1
3920
3921 static unsigned short memid, grpid;
3922 static unsigned int uic;
3923
3924 /* Called from init_sys_modes, so it happens not very often
3925 but at least each time Emacs is loaded. */
3926 void
3927 sys_access_reinit ()
3928 {
3929 uic = 0;
3930 }
3931
3932 int
3933 sys_access (filename, type)
3934 char * filename;
3935 int type;
3936 {
3937 struct FAB fab;
3938 struct XABPRO xab;
3939 int status, size, i, typecode, acl_controlled;
3940 unsigned int *aclptr, *aclend, aclbuf[60];
3941 union prvdef prvmask;
3942
3943 /* Get UIC and GRP values for protection checking. */
3944 if (uic == 0)
3945 {
3946 status = LIB$GETJPI (&JPI$_UIC, 0, 0, &uic, 0, 0);
3947 if (! (status & 1))
3948 return -1;
3949 memid = uic & 0xFFFF;
3950 grpid = uic >> 16;
3951 }
3952
3953 if (type != 2) /* not checking write access */
3954 return access (filename, type);
3955
3956 /* Check write protection. */
3957
3958 #define CHECKPRIV(bit) (prvmask.bit)
3959 #define WRITABLE(field) (! ((xab.xab$w_pro >> field) & XAB$M_NOWRITE))
3960
3961 /* Find privilege bits */
3962 status = SYS$SETPRV (0, 0, 0, prvmask);
3963 if (! (status & 1))
3964 error ("Unable to find privileges: %s", vmserrstr (status));
3965 if (CHECKPRIV (PRV$V_BYPASS))
3966 return 0; /* BYPASS enabled */
3967 fab = cc$rms_fab;
3968 fab.fab$b_fac = FAB$M_GET;
3969 fab.fab$l_fna = filename;
3970 fab.fab$b_fns = strlen (filename);
3971 fab.fab$l_xab = &xab;
3972 xab = cc$rms_xabpro;
3973 xab.xab$l_aclbuf = aclbuf;
3974 xab.xab$w_aclsiz = sizeof (aclbuf);
3975 status = SYS$OPEN (&fab, 0, 0);
3976 if (! (status & 1))
3977 return -1;
3978 SYS$CLOSE (&fab, 0, 0);
3979 /* Check system access */
3980 if (CHECKPRIV (PRV$V_SYSPRV) && WRITABLE (XAB$V_SYS))
3981 return 0;
3982 /* Check ACL entries, if any */
3983 acl_controlled = 0;
3984 if (xab.xab$w_acllen > 0)
3985 {
3986 aclptr = aclbuf;
3987 aclend = &aclbuf[xab.xab$w_acllen / 4];
3988 while (*aclptr && aclptr < aclend)
3989 {
3990 size = (*aclptr & 0xff) / 4;
3991 typecode = (*aclptr >> 8) & 0xff;
3992 if (typecode == ACE$C_KEYID)
3993 for (i = size - 1; i > 1; i--)
3994 if (aclptr[i] == uic)
3995 {
3996 acl_controlled = 1;
3997 if (aclptr[1] & ACE$M_WRITE)
3998 return 0; /* Write access through ACL */
3999 }
4000 aclptr = &aclptr[size];
4001 }
4002 if (acl_controlled) /* ACL specified, prohibits write access */
4003 return -1;
4004 }
4005 /* No ACL entries specified, check normal protection */
4006 if (WRITABLE (XAB$V_WLD)) /* World writable */
4007 return 0;
4008 if (WRITABLE (XAB$V_GRP) &&
4009 (unsigned short) (xab.xab$l_uic >> 16) == grpid)
4010 return 0; /* Group writable */
4011 if (WRITABLE (XAB$V_OWN) &&
4012 (xab.xab$l_uic & 0xFFFF) == memid)
4013 return 0; /* Owner writable */
4014
4015 return -1; /* Not writable */
4016 }
4017 #endif /* not VMS4_4 */
4018 #endif /* access */
4019
4020 static char vtbuf[NAM$C_MAXRSS+1];
4021
4022 /* translate a vms file spec to a unix path */
4023 char *
4024 sys_translate_vms (vfile)
4025 char * vfile;
4026 {
4027 char * p;
4028 char * targ;
4029
4030 if (!vfile)
4031 return 0;
4032
4033 targ = vtbuf;
4034
4035 /* leading device or logical name is a root directory */
4036 if (p = strchr (vfile, ':'))
4037 {
4038 *targ++ = '/';
4039 while (vfile < p)
4040 *targ++ = *vfile++;
4041 vfile++;
4042 *targ++ = '/';
4043 }
4044 p = vfile;
4045 if (*p == '[' || *p == '<')
4046 {
4047 while (*++vfile != *p + 2)
4048 switch (*vfile)
4049 {
4050 case '.':
4051 if (vfile[-1] == *p)
4052 *targ++ = '.';
4053 *targ++ = '/';
4054 break;
4055
4056 case '-':
4057 *targ++ = '.';
4058 *targ++ = '.';
4059 break;
4060
4061 default:
4062 *targ++ = *vfile;
4063 break;
4064 }
4065 vfile++;
4066 *targ++ = '/';
4067 }
4068 while (*vfile)
4069 *targ++ = *vfile++;
4070
4071 return vtbuf;
4072 }
4073
4074 static char utbuf[NAM$C_MAXRSS+1];
4075
4076 /* translate a unix path to a VMS file spec */
4077 char *
4078 sys_translate_unix (ufile)
4079 char * ufile;
4080 {
4081 int slash_seen = 0;
4082 char *p;
4083 char * targ;
4084
4085 if (!ufile)
4086 return 0;
4087
4088 targ = utbuf;
4089
4090 if (*ufile == '/')
4091 {
4092 ufile++;
4093 }
4094
4095 while (*ufile)
4096 {
4097 switch (*ufile)
4098 {
4099 case '/':
4100 if (slash_seen)
4101 if (index (&ufile[1], '/'))
4102 *targ++ = '.';
4103 else
4104 *targ++ = ']';
4105 else
4106 {
4107 *targ++ = ':';
4108 if (index (&ufile[1], '/'))
4109 *targ++ = '[';
4110 slash_seen = 1;
4111 }
4112 break;
4113
4114 case '.':
4115 if (strncmp (ufile, "./", 2) == 0)
4116 {
4117 if (!slash_seen)
4118 {
4119 *targ++ = '[';
4120 slash_seen = 1;
4121 }
4122 ufile++; /* skip the dot */
4123 if (index (&ufile[1], '/'))
4124 *targ++ = '.';
4125 else
4126 *targ++ = ']';
4127 }
4128 else if (strncmp (ufile, "../", 3) == 0)
4129 {
4130 if (!slash_seen)
4131 {
4132 *targ++ = '[';
4133 slash_seen = 1;
4134 }
4135 *targ++ = '-';
4136 ufile += 2; /* skip the dots */
4137 if (index (&ufile[1], '/'))
4138 *targ++ = '.';
4139 else
4140 *targ++ = ']';
4141 }
4142 else
4143 *targ++ = *ufile;
4144 break;
4145
4146 default:
4147 *targ++ = *ufile;
4148 break;
4149 }
4150 ufile++;
4151 }
4152 *targ = '\0';
4153
4154 return utbuf;
4155 }
4156
4157 char *
4158 getwd (pathname)
4159 char *pathname;
4160 {
4161 char *ptr, *val;
4162 extern char *getcwd ();
4163
4164 #define MAXPATHLEN 1024
4165
4166 ptr = xmalloc (MAXPATHLEN);
4167 val = getcwd (ptr, MAXPATHLEN);
4168 if (val == 0)
4169 {
4170 xfree (ptr);
4171 return val;
4172 }
4173 strcpy (pathname, ptr);
4174 xfree (ptr);
4175
4176 return pathname;
4177 }
4178
4179 int
4180 getppid ()
4181 {
4182 long item_code = JPI$_OWNER;
4183 unsigned long parent_id;
4184 int status;
4185
4186 if (((status = LIB$GETJPI (&item_code, 0, 0, &parent_id)) & 1) == 0)
4187 {
4188 errno = EVMSERR;
4189 vaxc$errno = status;
4190 return -1;
4191 }
4192 return parent_id;
4193 }
4194
4195 #undef getuid
4196 unsigned
4197 sys_getuid ()
4198 {
4199 return (getgid () << 16) | getuid ();
4200 }
4201
4202 #undef read
4203 int
4204 sys_read (fildes, buf, nbyte)
4205 int fildes;
4206 char *buf;
4207 unsigned int nbyte;
4208 {
4209 return read (fildes, buf, (nbyte < MAXIOSIZE ? nbyte : MAXIOSIZE));
4210 }
4211
4212 #if 0
4213 int
4214 sys_write (fildes, buf, nbyte)
4215 int fildes;
4216 char *buf;
4217 unsigned int nbyte;
4218 {
4219 register int nwrote, rtnval = 0;
4220
4221 while (nbyte > MAXIOSIZE && (nwrote = write (fildes, buf, MAXIOSIZE)) > 0) {
4222 nbyte -= nwrote;
4223 buf += nwrote;
4224 rtnval += nwrote;
4225 }
4226 if (nwrote < 0)
4227 return rtnval ? rtnval : -1;
4228 if ((nwrote = write (fildes, buf, nbyte)) < 0)
4229 return rtnval ? rtnval : -1;
4230 return (rtnval + nwrote);
4231 }
4232 #endif /* 0 */
4233
4234 /*
4235 * VAX/VMS VAX C RTL really loses. It insists that records
4236 * end with a newline (carriage return) character, and if they
4237 * don't it adds one (nice of it isn't it!)
4238 *
4239 * Thus we do this stupidity below.
4240 */
4241
4242 #undef write
4243 int
4244 sys_write (fildes, buf, nbytes)
4245 int fildes;
4246 char *buf;
4247 unsigned int nbytes;
4248 {
4249 register char *p;
4250 register char *e;
4251 int sum = 0;
4252 struct stat st;
4253
4254 fstat (fildes, &st);
4255 p = buf;
4256 while (nbytes > 0)
4257 {
4258 int len, retval;
4259
4260 /* Handle fixed-length files with carriage control. */
4261 if (st.st_fab_rfm == FAB$C_FIX
4262 && ((st.st_fab_rat & (FAB$M_FTN | FAB$M_CR)) != 0))
4263 {
4264 len = st.st_fab_mrs;
4265 retval = write (fildes, p, min (len, nbytes));
4266 if (retval != len)
4267 return -1;
4268 retval++; /* This skips the implied carriage control */
4269 }
4270 else
4271 {
4272 e = p + min (MAXIOSIZE, nbytes) - 1;
4273 while (*e != '\n' && e > p) e--;
4274 if (p == e) /* Ok.. so here we add a newline... sigh. */
4275 e = p + min (MAXIOSIZE, nbytes) - 1;
4276 len = e + 1 - p;
4277 retval = write (fildes, p, len);
4278 if (retval != len)
4279 return -1;
4280 }
4281 p += retval;
4282 sum += retval;
4283 nbytes -= retval;
4284 }
4285 return sum;
4286 }
4287
4288 /* Create file NEW copying its attributes from file OLD. If
4289 OLD is 0 or does not exist, create based on the value of
4290 vms_stmlf_recfm. */
4291
4292 /* Protection value the file should ultimately have.
4293 Set by create_copy_attrs, and use by rename_sansversions. */
4294 static unsigned short int fab_final_pro;
4295
4296 int
4297 creat_copy_attrs (old, new)
4298 char *old, *new;
4299 {
4300 struct FAB fab = cc$rms_fab;
4301 struct XABPRO xabpro;
4302 char aclbuf[256]; /* Choice of size is arbitrary. See below. */
4303 extern int vms_stmlf_recfm;
4304
4305 if (old)
4306 {
4307 fab.fab$b_fac = FAB$M_GET;
4308 fab.fab$l_fna = old;
4309 fab.fab$b_fns = strlen (old);
4310 fab.fab$l_xab = (char *) &xabpro;
4311 xabpro = cc$rms_xabpro;
4312 xabpro.xab$l_aclbuf = aclbuf;
4313 xabpro.xab$w_aclsiz = sizeof aclbuf;
4314 /* Call $OPEN to fill in the fab & xabpro fields. */
4315 if (SYS$OPEN (&fab, 0, 0) & 1)
4316 {
4317 SYS$CLOSE (&fab, 0, 0);
4318 fab.fab$l_alq = 0; /* zero the allocation quantity */
4319 if (xabpro.xab$w_acllen > 0)
4320 {
4321 if (xabpro.xab$w_acllen > sizeof aclbuf)
4322 /* If the acl buffer was too short, redo open with longer one.
4323 Wouldn't need to do this if there were some system imposed
4324 limit on the size of an ACL, but I can't find any such. */
4325 {
4326 xabpro.xab$l_aclbuf = (char *) alloca (xabpro.xab$w_acllen);
4327 xabpro.xab$w_aclsiz = xabpro.xab$w_acllen;
4328 if (SYS$OPEN (&fab, 0, 0) & 1)
4329 SYS$CLOSE (&fab, 0, 0);
4330 else
4331 old = 0;
4332 }
4333 }
4334 else
4335 xabpro.xab$l_aclbuf = 0;
4336 }
4337 else
4338 old = 0;
4339 }
4340 fab.fab$l_fna = new;
4341 fab.fab$b_fns = strlen (new);
4342 if (!old)
4343 {
4344 fab.fab$l_xab = 0;
4345 fab.fab$b_rfm = vms_stmlf_recfm ? FAB$C_STMLF : FAB$C_VAR;
4346 fab.fab$b_rat = FAB$M_CR;
4347 }
4348
4349 /* Set the file protections such that we will be able to manipulate
4350 this file. Once we are done writing and renaming it, we will set
4351 the protections back. */
4352 if (old)
4353 fab_final_pro = xabpro.xab$w_pro;
4354 else
4355 SYS$SETDFPROT (0, &fab_final_pro);
4356 xabpro.xab$w_pro &= 0xff0f; /* set O:rewd for now. This is set back later. */
4357
4358 /* Create the new file with either default attrs or attrs copied
4359 from old file. */
4360 if (!(SYS$CREATE (&fab, 0, 0) & 1))
4361 return -1;
4362 SYS$CLOSE (&fab, 0, 0);
4363 /* As this is a "replacement" for creat, return a file descriptor
4364 opened for writing. */
4365 return open (new, O_WRONLY);
4366 }
4367
4368 #ifdef creat
4369 #undef creat
4370 #include <varargs.h>
4371 #ifdef __GNUC__
4372 #ifndef va_count
4373 #define va_count(X) ((X) = *(((int *) &(va_alist)) - 1))
4374 #endif
4375 #endif
4376
4377 int
4378 sys_creat (va_alist)
4379 va_dcl
4380 {
4381 va_list list_incrementer;
4382 char *name;
4383 int mode;
4384 int rfd; /* related file descriptor */
4385 int fd; /* Our new file descriptor */
4386 int count;
4387 struct stat st_buf;
4388 char rfm[12];
4389 char rat[15];
4390 char mrs[13];
4391 char fsz[13];
4392 extern int vms_stmlf_recfm;
4393
4394 va_count (count);
4395 va_start (list_incrementer);
4396 name = va_arg (list_incrementer, char *);
4397 mode = va_arg (list_incrementer, int);
4398 if (count > 2)
4399 rfd = va_arg (list_incrementer, int);
4400 va_end (list_incrementer);
4401 if (count > 2)
4402 {
4403 /* Use information from the related file descriptor to set record
4404 format of the newly created file. */
4405 fstat (rfd, &st_buf);
4406 switch (st_buf.st_fab_rfm)
4407 {
4408 case FAB$C_FIX:
4409 strcpy (rfm, "rfm = fix");
4410 sprintf (mrs, "mrs = %d", st_buf.st_fab_mrs);
4411 strcpy (rat, "rat = ");
4412 if (st_buf.st_fab_rat & FAB$M_CR)
4413 strcat (rat, "cr");
4414 else if (st_buf.st_fab_rat & FAB$M_FTN)
4415 strcat (rat, "ftn");
4416 else if (st_buf.st_fab_rat & FAB$M_PRN)
4417 strcat (rat, "prn");
4418 if (st_buf.st_fab_rat & FAB$M_BLK)
4419 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4420 strcat (rat, ", blk");
4421 else
4422 strcat (rat, "blk");
4423 return creat (name, 0, rfm, rat, mrs);
4424
4425 case FAB$C_VFC:
4426 strcpy (rfm, "rfm = vfc");
4427 sprintf (fsz, "fsz = %d", st_buf.st_fab_fsz);
4428 strcpy (rat, "rat = ");
4429 if (st_buf.st_fab_rat & FAB$M_CR)
4430 strcat (rat, "cr");
4431 else if (st_buf.st_fab_rat & FAB$M_FTN)
4432 strcat (rat, "ftn");
4433 else if (st_buf.st_fab_rat & FAB$M_PRN)
4434 strcat (rat, "prn");
4435 if (st_buf.st_fab_rat & FAB$M_BLK)
4436 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4437 strcat (rat, ", blk");
4438 else
4439 strcat (rat, "blk");
4440 return creat (name, 0, rfm, rat, fsz);
4441
4442 case FAB$C_STM:
4443 strcpy (rfm, "rfm = stm");
4444 break;
4445
4446 case FAB$C_STMCR:
4447 strcpy (rfm, "rfm = stmcr");
4448 break;
4449
4450 case FAB$C_STMLF:
4451 strcpy (rfm, "rfm = stmlf");
4452 break;
4453
4454 case FAB$C_UDF:
4455 strcpy (rfm, "rfm = udf");
4456 break;
4457
4458 case FAB$C_VAR:
4459 strcpy (rfm, "rfm = var");
4460 break;
4461 }
4462 strcpy (rat, "rat = ");
4463 if (st_buf.st_fab_rat & FAB$M_CR)
4464 strcat (rat, "cr");
4465 else if (st_buf.st_fab_rat & FAB$M_FTN)
4466 strcat (rat, "ftn");
4467 else if (st_buf.st_fab_rat & FAB$M_PRN)
4468 strcat (rat, "prn");
4469 if (st_buf.st_fab_rat & FAB$M_BLK)
4470 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4471 strcat (rat, ", blk");
4472 else
4473 strcat (rat, "blk");
4474 }
4475 else
4476 {
4477 strcpy (rfm, vms_stmlf_recfm ? "rfm = stmlf" : "rfm=var");
4478 strcpy (rat, "rat=cr");
4479 }
4480 /* Until the VAX C RTL fixes the many bugs with modes, always use
4481 mode 0 to get the user's default protection. */
4482 fd = creat (name, 0, rfm, rat);
4483 if (fd < 0 && errno == EEXIST)
4484 {
4485 if (unlink (name) < 0)
4486 report_file_error ("delete", build_string (name));
4487 fd = creat (name, 0, rfm, rat);
4488 }
4489 return fd;
4490 }
4491 #endif /* creat */
4492
4493 /* fwrite to stdout is S L O W. Speed it up by using fputc...*/
4494 int
4495 sys_fwrite (ptr, size, num, fp)
4496 register char * ptr;
4497 FILE * fp;
4498 {
4499 register int tot = num * size;
4500
4501 while (tot--)
4502 fputc (*ptr++, fp);
4503 return num;
4504 }
4505
4506 /*
4507 * The VMS C library routine creat actually creates a new version of an
4508 * existing file rather than truncating the old version. There are times
4509 * when this is not the desired behavior, for instance, when writing an
4510 * auto save file (you only want one version), or when you don't have
4511 * write permission in the directory containing the file (but the file
4512 * itself is writable). Hence this routine, which is equivalent to
4513 * "close (creat (fn, 0));" on Unix if fn already exists.
4514 */
4515 int
4516 vms_truncate (fn)
4517 char *fn;
4518 {
4519 struct FAB xfab = cc$rms_fab;
4520 struct RAB xrab = cc$rms_rab;
4521 int status;
4522
4523 xfab.fab$l_fop = FAB$M_TEF; /* free allocated but unused blocks on close */
4524 xfab.fab$b_fac = FAB$M_TRN | FAB$M_GET; /* allow truncate and get access */
4525 xfab.fab$b_shr = FAB$M_NIL; /* allow no sharing - file must be locked */
4526 xfab.fab$l_fna = fn;
4527 xfab.fab$b_fns = strlen (fn);
4528 xfab.fab$l_dna = ";0"; /* default to latest version of the file */
4529 xfab.fab$b_dns = 2;
4530 xrab.rab$l_fab = &xfab;
4531
4532 /* This gibberish opens the file, positions to the first record, and
4533 deletes all records from there until the end of file. */
4534 if ((SYS$OPEN (&xfab) & 01) == 01)
4535 {
4536 if ((SYS$CONNECT (&xrab) & 01) == 01 &&
4537 (SYS$FIND (&xrab) & 01) == 01 &&
4538 (SYS$TRUNCATE (&xrab) & 01) == 01)
4539 status = 0;
4540 else
4541 status = -1;
4542 }
4543 else
4544 status = -1;
4545 SYS$CLOSE (&xfab);
4546 return status;
4547 }
4548
4549 /* Define this symbol to actually read SYSUAF.DAT. This requires either
4550 SYSPRV or a readable SYSUAF.DAT. */
4551
4552 #ifdef READ_SYSUAF
4553 /*
4554 * getuaf.c
4555 *
4556 * Routine to read the VMS User Authorization File and return
4557 * a specific user's record.
4558 */
4559
4560 static struct UAF retuaf;
4561
4562 struct UAF *
4563 get_uaf_name (uname)
4564 char * uname;
4565 {
4566 register status;
4567 struct FAB uaf_fab;
4568 struct RAB uaf_rab;
4569
4570 uaf_fab = cc$rms_fab;
4571 uaf_rab = cc$rms_rab;
4572 /* initialize fab fields */
4573 uaf_fab.fab$l_fna = "SYS$SYSTEM:SYSUAF.DAT";
4574 uaf_fab.fab$b_fns = 21;
4575 uaf_fab.fab$b_fac = FAB$M_GET;
4576 uaf_fab.fab$b_org = FAB$C_IDX;
4577 uaf_fab.fab$b_shr = FAB$M_GET|FAB$M_PUT|FAB$M_UPD|FAB$M_DEL;
4578 /* initialize rab fields */
4579 uaf_rab.rab$l_fab = &uaf_fab;
4580 /* open the User Authorization File */
4581 status = SYS$OPEN (&uaf_fab);
4582 if (!(status&1))
4583 {
4584 errno = EVMSERR;
4585 vaxc$errno = status;
4586 return 0;
4587 }
4588 status = SYS$CONNECT (&uaf_rab);
4589 if (!(status&1))
4590 {
4591 errno = EVMSERR;
4592 vaxc$errno = status;
4593 return 0;
4594 }
4595 /* read the requested record - index is in uname */
4596 uaf_rab.rab$l_kbf = uname;
4597 uaf_rab.rab$b_ksz = strlen (uname);
4598 uaf_rab.rab$b_rac = RAB$C_KEY;
4599 uaf_rab.rab$l_ubf = (char *)&retuaf;
4600 uaf_rab.rab$w_usz = sizeof retuaf;
4601 status = SYS$GET (&uaf_rab);
4602 if (!(status&1))
4603 {
4604 errno = EVMSERR;
4605 vaxc$errno = status;
4606 return 0;
4607 }
4608 /* close the User Authorization File */
4609 status = SYS$DISCONNECT (&uaf_rab);
4610 if (!(status&1))
4611 {
4612 errno = EVMSERR;
4613 vaxc$errno = status;
4614 return 0;
4615 }
4616 status = SYS$CLOSE (&uaf_fab);
4617 if (!(status&1))
4618 {
4619 errno = EVMSERR;
4620 vaxc$errno = status;
4621 return 0;
4622 }
4623 return &retuaf;
4624 }
4625
4626 struct UAF *
4627 get_uaf_uic (uic)
4628 unsigned long uic;
4629 {
4630 register status;
4631 struct FAB uaf_fab;
4632 struct RAB uaf_rab;
4633
4634 uaf_fab = cc$rms_fab;
4635 uaf_rab = cc$rms_rab;
4636 /* initialize fab fields */
4637 uaf_fab.fab$l_fna = "SYS$SYSTEM:SYSUAF.DAT";
4638 uaf_fab.fab$b_fns = 21;
4639 uaf_fab.fab$b_fac = FAB$M_GET;
4640 uaf_fab.fab$b_org = FAB$C_IDX;
4641 uaf_fab.fab$b_shr = FAB$M_GET|FAB$M_PUT|FAB$M_UPD|FAB$M_DEL;
4642 /* initialize rab fields */
4643 uaf_rab.rab$l_fab = &uaf_fab;
4644 /* open the User Authorization File */
4645 status = SYS$OPEN (&uaf_fab);
4646 if (!(status&1))
4647 {
4648 errno = EVMSERR;
4649 vaxc$errno = status;
4650 return 0;
4651 }
4652 status = SYS$CONNECT (&uaf_rab);
4653 if (!(status&1))
4654 {
4655 errno = EVMSERR;
4656 vaxc$errno = status;
4657 return 0;
4658 }
4659 /* read the requested record - index is in uic */
4660 uaf_rab.rab$b_krf = 1; /* 1st alternate key */
4661 uaf_rab.rab$l_kbf = (char *) &uic;
4662 uaf_rab.rab$b_ksz = sizeof uic;
4663 uaf_rab.rab$b_rac = RAB$C_KEY;
4664 uaf_rab.rab$l_ubf = (char *)&retuaf;
4665 uaf_rab.rab$w_usz = sizeof retuaf;
4666 status = SYS$GET (&uaf_rab);
4667 if (!(status&1))
4668 {
4669 errno = EVMSERR;
4670 vaxc$errno = status;
4671 return 0;
4672 }
4673 /* close the User Authorization File */
4674 status = SYS$DISCONNECT (&uaf_rab);
4675 if (!(status&1))
4676 {
4677 errno = EVMSERR;
4678 vaxc$errno = status;
4679 return 0;
4680 }
4681 status = SYS$CLOSE (&uaf_fab);
4682 if (!(status&1))
4683 {
4684 errno = EVMSERR;
4685 vaxc$errno = status;
4686 return 0;
4687 }
4688 return &retuaf;
4689 }
4690
4691 static struct passwd retpw;
4692
4693 struct passwd *
4694 cnv_uaf_pw (up)
4695 struct UAF * up;
4696 {
4697 char * ptr;
4698
4699 /* copy these out first because if the username is 32 chars, the next
4700 section will overwrite the first byte of the UIC */
4701 retpw.pw_uid = up->uaf$w_mem;
4702 retpw.pw_gid = up->uaf$w_grp;
4703
4704 /* I suppose this is not the best style, to possibly overwrite one
4705 byte beyond the end of the field, but what the heck... */
4706 ptr = &up->uaf$t_username[UAF$S_USERNAME];
4707 while (ptr[-1] == ' ')
4708 ptr--;
4709 *ptr = '\0';
4710 strcpy (retpw.pw_name, up->uaf$t_username);
4711
4712 /* the rest of these are counted ascii strings */
4713 strncpy (retpw.pw_gecos, &up->uaf$t_owner[1], up->uaf$t_owner[0]);
4714 retpw.pw_gecos[up->uaf$t_owner[0]] = '\0';
4715 strncpy (retpw.pw_dir, &up->uaf$t_defdev[1], up->uaf$t_defdev[0]);
4716 retpw.pw_dir[up->uaf$t_defdev[0]] = '\0';
4717 strncat (retpw.pw_dir, &up->uaf$t_defdir[1], up->uaf$t_defdir[0]);
4718 retpw.pw_dir[up->uaf$t_defdev[0] + up->uaf$t_defdir[0]] = '\0';
4719 strncpy (retpw.pw_shell, &up->uaf$t_defcli[1], up->uaf$t_defcli[0]);
4720 retpw.pw_shell[up->uaf$t_defcli[0]] = '\0';
4721
4722 return &retpw;
4723 }
4724 #else /* not READ_SYSUAF */
4725 static struct passwd retpw;
4726 #endif /* not READ_SYSUAF */
4727
4728 struct passwd *
4729 getpwnam (name)
4730 char * name;
4731 {
4732 #ifdef READ_SYSUAF
4733 struct UAF *up;
4734 #else
4735 char * user;
4736 char * dir;
4737 unsigned char * full;
4738 #endif /* READ_SYSUAF */
4739 char *ptr = name;
4740
4741 while (*ptr)
4742 {
4743 if ('a' <= *ptr && *ptr <= 'z')
4744 *ptr -= 040;
4745 ptr++;
4746 }
4747 #ifdef READ_SYSUAF
4748 if (!(up = get_uaf_name (name)))
4749 return 0;
4750 return cnv_uaf_pw (up);
4751 #else
4752 if (strcmp (name, getenv ("USER")) == 0)
4753 {
4754 retpw.pw_uid = getuid ();
4755 retpw.pw_gid = getgid ();
4756 strcpy (retpw.pw_name, name);
4757 if (full = egetenv ("FULLNAME"))
4758 strcpy (retpw.pw_gecos, full);
4759 else
4760 *retpw.pw_gecos = '\0';
4761 strcpy (retpw.pw_dir, egetenv ("HOME"));
4762 *retpw.pw_shell = '\0';
4763 return &retpw;
4764 }
4765 else
4766 return 0;
4767 #endif /* not READ_SYSUAF */
4768 }
4769
4770 struct passwd *
4771 getpwuid (uid)
4772 unsigned long uid;
4773 {
4774 #ifdef READ_SYSUAF
4775 struct UAF * up;
4776
4777 if (!(up = get_uaf_uic (uid)))
4778 return 0;
4779 return cnv_uaf_pw (up);
4780 #else
4781 if (uid == sys_getuid ())
4782 return getpwnam (egetenv ("USER"));
4783 else
4784 return 0;
4785 #endif /* not READ_SYSUAF */
4786 }
4787
4788 /* return total address space available to the current process. This is
4789 the sum of the current p0 size, p1 size and free page table entries
4790 available. */
4791 int
4792 vlimit ()
4793 {
4794 int item_code;
4795 unsigned long free_pages;
4796 unsigned long frep0va;
4797 unsigned long frep1va;
4798 register status;
4799
4800 item_code = JPI$_FREPTECNT;
4801 if (((status = LIB$GETJPI (&item_code, 0, 0, &free_pages)) & 1) == 0)
4802 {
4803 errno = EVMSERR;
4804 vaxc$errno = status;
4805 return -1;
4806 }
4807 free_pages *= 512;
4808
4809 item_code = JPI$_FREP0VA;
4810 if (((status = LIB$GETJPI (&item_code, 0, 0, &frep0va)) & 1) == 0)
4811 {
4812 errno = EVMSERR;
4813 vaxc$errno = status;
4814 return -1;
4815 }
4816 item_code = JPI$_FREP1VA;
4817 if (((status = LIB$GETJPI (&item_code, 0, 0, &frep1va)) & 1) == 0)
4818 {
4819 errno = EVMSERR;
4820 vaxc$errno = status;
4821 return -1;
4822 }
4823
4824 return free_pages + frep0va + (0x7fffffff - frep1va);
4825 }
4826
4827 int
4828 define_logical_name (varname, string)
4829 char *varname;
4830 char *string;
4831 {
4832 struct dsc$descriptor_s strdsc =
4833 {strlen (string), DSC$K_DTYPE_T, DSC$K_CLASS_S, string};
4834 struct dsc$descriptor_s envdsc =
4835 {strlen (varname), DSC$K_DTYPE_T, DSC$K_CLASS_S, varname};
4836 struct dsc$descriptor_s lnmdsc =
4837 {7, DSC$K_DTYPE_T, DSC$K_CLASS_S, "LNM$JOB"};
4838
4839 return LIB$SET_LOGICAL (&envdsc, &strdsc, &lnmdsc, 0, 0);
4840 }
4841
4842 int
4843 delete_logical_name (varname)
4844 char *varname;
4845 {
4846 struct dsc$descriptor_s envdsc =
4847 {strlen (varname), DSC$K_DTYPE_T, DSC$K_CLASS_S, varname};
4848 struct dsc$descriptor_s lnmdsc =
4849 {7, DSC$K_DTYPE_T, DSC$K_CLASS_S, "LNM$JOB"};
4850
4851 return LIB$DELETE_LOGICAL (&envdsc, &lnmdsc);
4852 }
4853
4854 int
4855 ulimit ()
4856 {
4857 return 0;
4858 }
4859
4860 int
4861 setpgrp ()
4862 {
4863 return 0;
4864 }
4865
4866 int
4867 execvp ()
4868 {
4869 error ("execvp system call not implemented");
4870 return -1;
4871 }
4872
4873 int
4874 rename (from, to)
4875 char *from, *to;
4876 {
4877 int status;
4878 struct FAB from_fab = cc$rms_fab, to_fab = cc$rms_fab;
4879 struct NAM from_nam = cc$rms_nam, to_nam = cc$rms_nam;
4880 char from_esn[NAM$C_MAXRSS];
4881 char to_esn[NAM$C_MAXRSS];
4882
4883 from_fab.fab$l_fna = from;
4884 from_fab.fab$b_fns = strlen (from);
4885 from_fab.fab$l_nam = &from_nam;
4886 from_fab.fab$l_fop = FAB$M_NAM;
4887
4888 from_nam.nam$l_esa = from_esn;
4889 from_nam.nam$b_ess = sizeof from_esn;
4890
4891 to_fab.fab$l_fna = to;
4892 to_fab.fab$b_fns = strlen (to);
4893 to_fab.fab$l_nam = &to_nam;
4894 to_fab.fab$l_fop = FAB$M_NAM;
4895
4896 to_nam.nam$l_esa = to_esn;
4897 to_nam.nam$b_ess = sizeof to_esn;
4898
4899 status = SYS$RENAME (&from_fab, 0, 0, &to_fab);
4900
4901 if (status & 1)
4902 return 0;
4903 else
4904 {
4905 if (status == RMS$_DEV)
4906 errno = EXDEV;
4907 else
4908 errno = EVMSERR;
4909 vaxc$errno = status;
4910 return -1;
4911 }
4912 }
4913
4914 /* This function renames a file like `rename', but it strips
4915 the version number from the "to" filename, such that the "to" file is
4916 will always be a new version. It also sets the file protection once it is
4917 finished. The protection that we will use is stored in fab_final_pro,
4918 and was set when we did a creat_copy_attrs to create the file that we
4919 are renaming.
4920
4921 We could use the chmod function, but Eunichs uses 3 bits per user category
4922 to describe the protection, and VMS uses 4 (write and delete are separate
4923 bits). To maintain portability, the VMS implementation of `chmod' wires
4924 the W and D bits together. */
4925
4926
4927 static struct fibdef fib; /* We need this initialized to zero */
4928 char vms_file_written[NAM$C_MAXRSS];
4929
4930 int
4931 rename_sans_version (from,to)
4932 char *from, *to;
4933 {
4934 short int chan;
4935 int stat;
4936 short int iosb[4];
4937 int status;
4938 struct FAB to_fab = cc$rms_fab;
4939 struct NAM to_nam = cc$rms_nam;
4940 struct dsc$descriptor fib_d ={sizeof (fib),0,0,(char*) &fib};
4941 struct dsc$descriptor fib_attr[2]
4942 = {{sizeof (fab_final_pro),ATR$C_FPRO,0,(char*) &fab_final_pro},{0,0,0,0}};
4943 char to_esn[NAM$C_MAXRSS];
4944
4945 $DESCRIPTOR (disk,to_esn);
4946
4947 to_fab.fab$l_fna = to;
4948 to_fab.fab$b_fns = strlen (to);
4949 to_fab.fab$l_nam = &to_nam;
4950 to_fab.fab$l_fop = FAB$M_NAM;
4951
4952 to_nam.nam$l_esa = to_esn;
4953 to_nam.nam$b_ess = sizeof to_esn;
4954
4955 status = SYS$PARSE (&to_fab, 0, 0); /* figure out the full file name */
4956
4957 if (to_nam.nam$l_fnb && NAM$M_EXP_VER)
4958 *(to_nam.nam$l_ver) = '\0';
4959
4960 stat = rename (from, to_esn);
4961 if (stat < 0)
4962 return stat;
4963
4964 strcpy (vms_file_written, to_esn);
4965
4966 to_fab.fab$l_fna = vms_file_written; /* this points to the versionless name */
4967 to_fab.fab$b_fns = strlen (vms_file_written);
4968
4969 /* Now set the file protection to the correct value */
4970 SYS$OPEN (&to_fab, 0, 0); /* This fills in the nam$w_fid fields */
4971
4972 /* Copy these fields into the fib */
4973 fib.fib$r_fid_overlay.fib$w_fid[0] = to_nam.nam$w_fid[0];
4974 fib.fib$r_fid_overlay.fib$w_fid[1] = to_nam.nam$w_fid[1];
4975 fib.fib$r_fid_overlay.fib$w_fid[2] = to_nam.nam$w_fid[2];
4976
4977 SYS$CLOSE (&to_fab, 0, 0);
4978
4979 stat = SYS$ASSIGN (&disk, &chan, 0, 0); /* open a channel to the disk */
4980 if (!stat)
4981 LIB$SIGNAL (stat);
4982 stat = SYS$QIOW (0, chan, IO$_MODIFY, iosb, 0, 0, &fib_d,
4983 0, 0, 0, &fib_attr, 0);
4984 if (!stat)
4985 LIB$SIGNAL (stat);
4986 stat = SYS$DASSGN (chan);
4987 if (!stat)
4988 LIB$SIGNAL (stat);
4989 strcpy (vms_file_written, to_esn); /* We will write this to the terminal*/
4990 return 0;
4991 }
4992
4993 int
4994 link (file, new)
4995 char * file, * new;
4996 {
4997 register status;
4998 struct FAB fab;
4999 struct NAM nam;
5000 unsigned short fid[3];
5001 char esa[NAM$C_MAXRSS];
5002
5003 fab = cc$rms_fab;
5004 fab.fab$l_fop = FAB$M_OFP;
5005 fab.fab$l_fna = file;
5006 fab.fab$b_fns = strlen (file);
5007 fab.fab$l_nam = &nam;
5008
5009 nam = cc$rms_nam;
5010 nam.nam$l_esa = esa;
5011 nam.nam$b_ess = NAM$C_MAXRSS;
5012
5013 status = SYS$PARSE (&fab);
5014 if ((status & 1) == 0)
5015 {
5016 errno = EVMSERR;
5017 vaxc$errno = status;
5018 return -1;
5019 }
5020 status = SYS$SEARCH (&fab);
5021 if ((status & 1) == 0)
5022 {
5023 errno = EVMSERR;
5024 vaxc$errno = status;
5025 return -1;
5026 }
5027
5028 fid[0] = nam.nam$w_fid[0];
5029 fid[1] = nam.nam$w_fid[1];
5030 fid[2] = nam.nam$w_fid[2];
5031
5032 fab.fab$l_fna = new;
5033 fab.fab$b_fns = strlen (new);
5034
5035 status = SYS$PARSE (&fab);
5036 if ((status & 1) == 0)
5037 {
5038 errno = EVMSERR;
5039 vaxc$errno = status;
5040 return -1;
5041 }
5042
5043 nam.nam$w_fid[0] = fid[0];
5044 nam.nam$w_fid[1] = fid[1];
5045 nam.nam$w_fid[2] = fid[2];
5046
5047 nam.nam$l_esa = nam.nam$l_name;
5048 nam.nam$b_esl = nam.nam$b_name + nam.nam$b_type + nam.nam$b_ver;
5049
5050 status = SYS$ENTER (&fab);
5051 if ((status & 1) == 0)
5052 {
5053 errno = EVMSERR;
5054 vaxc$errno = status;
5055 return -1;
5056 }
5057
5058 return 0;
5059 }
5060
5061 void
5062 croak (badfunc)
5063 char *badfunc;
5064 {
5065 printf ("%s not yet implemented\r\n", badfunc);
5066 reset_sys_modes ();
5067 exit (1);
5068 }
5069
5070 long
5071 random ()
5072 {
5073 /* Arrange to return a range centered on zero. */
5074 return rand () - (1 << 30);
5075 }
5076
5077 void
5078 srandom (seed)
5079 {
5080 srand (seed);
5081 }
5082 #endif /* VMS */
5083 \f
5084 #ifdef AIXHFT
5085
5086 /* Called from init_sys_modes. */
5087 void
5088 hft_init ()
5089 {
5090 int junk;
5091
5092 /* If we're not on an HFT we shouldn't do any of this. We determine
5093 if we are on an HFT by trying to get an HFT error code. If this
5094 call fails, we're not on an HFT. */
5095 #ifdef IBMR2AIX
5096 if (ioctl (0, HFQERROR, &junk) < 0)
5097 return;
5098 #else /* not IBMR2AIX */
5099 if (ioctl (0, HFQEIO, 0) < 0)
5100 return;
5101 #endif /* not IBMR2AIX */
5102
5103 /* On AIX the default hft keyboard mapping uses backspace rather than delete
5104 as the rubout key's ASCII code. Here this is changed. The bug is that
5105 there's no way to determine the old mapping, so in reset_sys_modes
5106 we need to assume that the normal map had been present. Of course, this
5107 code also doesn't help if on a terminal emulator which doesn't understand
5108 HFT VTD's. */
5109 {
5110 struct hfbuf buf;
5111 struct hfkeymap keymap;
5112
5113 buf.hf_bufp = (char *)&keymap;
5114 buf.hf_buflen = sizeof (keymap);
5115 keymap.hf_nkeys = 2;
5116 keymap.hfkey[0].hf_kpos = 15;
5117 keymap.hfkey[0].hf_kstate = HFMAPCHAR | HFSHFNONE;
5118 #ifdef IBMR2AIX
5119 keymap.hfkey[0].hf_keyidh = '<';
5120 #else /* not IBMR2AIX */
5121 keymap.hfkey[0].hf_page = '<';
5122 #endif /* not IBMR2AIX */
5123 keymap.hfkey[0].hf_char = 127;
5124 keymap.hfkey[1].hf_kpos = 15;
5125 keymap.hfkey[1].hf_kstate = HFMAPCHAR | HFSHFSHFT;
5126 #ifdef IBMR2AIX
5127 keymap.hfkey[1].hf_keyidh = '<';
5128 #else /* not IBMR2AIX */
5129 keymap.hfkey[1].hf_page = '<';
5130 #endif /* not IBMR2AIX */
5131 keymap.hfkey[1].hf_char = 127;
5132 hftctl (0, HFSKBD, &buf);
5133 }
5134 /* The HFT system on AIX doesn't optimize for scrolling, so it's really ugly
5135 at times. */
5136 line_ins_del_ok = char_ins_del_ok = 0;
5137 }
5138
5139 /* Reset the rubout key to backspace. */
5140
5141 void
5142 hft_reset ()
5143 {
5144 struct hfbuf buf;
5145 struct hfkeymap keymap;
5146 int junk;
5147
5148 #ifdef IBMR2AIX
5149 if (ioctl (0, HFQERROR, &junk) < 0)
5150 return;
5151 #else /* not IBMR2AIX */
5152 if (ioctl (0, HFQEIO, 0) < 0)
5153 return;
5154 #endif /* not IBMR2AIX */
5155
5156 buf.hf_bufp = (char *)&keymap;
5157 buf.hf_buflen = sizeof (keymap);
5158 keymap.hf_nkeys = 2;
5159 keymap.hfkey[0].hf_kpos = 15;
5160 keymap.hfkey[0].hf_kstate = HFMAPCHAR | HFSHFNONE;
5161 #ifdef IBMR2AIX
5162 keymap.hfkey[0].hf_keyidh = '<';
5163 #else /* not IBMR2AIX */
5164 keymap.hfkey[0].hf_page = '<';
5165 #endif /* not IBMR2AIX */
5166 keymap.hfkey[0].hf_char = 8;
5167 keymap.hfkey[1].hf_kpos = 15;
5168 keymap.hfkey[1].hf_kstate = HFMAPCHAR | HFSHFSHFT;
5169 #ifdef IBMR2AIX
5170 keymap.hfkey[1].hf_keyidh = '<';
5171 #else /* not IBMR2AIX */
5172 keymap.hfkey[1].hf_page = '<';
5173 #endif /* not IBMR2AIX */
5174 keymap.hfkey[1].hf_char = 8;
5175 hftctl (0, HFSKBD, &buf);
5176 }
5177
5178 #endif /* AIXHFT */
5179
5180 #ifdef USE_DL_STUBS
5181
5182 /* These are included on Sunos 4.1 when we do not use shared libraries.
5183 X11 libraries may refer to these functions but (we hope) do not
5184 actually call them. */
5185
5186 void *
5187 dlopen ()
5188 {
5189 return 0;
5190 }
5191
5192 void *
5193 dlsym ()
5194 {
5195 return 0;
5196 }
5197
5198 int
5199 dlclose ()
5200 {
5201 return -1;
5202 }
5203
5204 #endif /* USE_DL_STUBS */
5205 \f
5206 #ifndef BSTRING
5207
5208 #ifndef bzero
5209
5210 void
5211 bzero (b, length)
5212 register char *b;
5213 register int length;
5214 {
5215 #ifdef VMS
5216 short zero = 0;
5217 long max_str = 65535;
5218
5219 while (length > max_str) {
5220 (void) LIB$MOVC5 (&zero, &zero, &zero, &max_str, b);
5221 length -= max_str;
5222 b += max_str;
5223 }
5224 max_str = length;
5225 (void) LIB$MOVC5 (&zero, &zero, &zero, &max_str, b);
5226 #else
5227 while (length-- > 0)
5228 *b++ = 0;
5229 #endif /* not VMS */
5230 }
5231
5232 #endif /* no bzero */
5233 #endif /* BSTRING */
5234
5235 #if (!defined (BSTRING) && !defined (bcopy)) || defined (NEED_BCOPY)
5236 #undef bcopy
5237
5238 /* Saying `void' requires a declaration, above, where bcopy is used
5239 and that declaration causes pain for systems where bcopy is a macro. */
5240 bcopy (b1, b2, length)
5241 register char *b1;
5242 register char *b2;
5243 register int length;
5244 {
5245 #ifdef VMS
5246 long max_str = 65535;
5247
5248 while (length > max_str) {
5249 (void) LIB$MOVC3 (&max_str, b1, b2);
5250 length -= max_str;
5251 b1 += max_str;
5252 b2 += max_str;
5253 }
5254 max_str = length;
5255 (void) LIB$MOVC3 (&length, b1, b2);
5256 #else
5257 while (length-- > 0)
5258 *b2++ = *b1++;
5259 #endif /* not VMS */
5260 }
5261 #endif /* (!defined (BSTRING) && !defined (bcopy)) || defined (NEED_BCOPY) */
5262
5263 #ifndef BSTRING
5264 #ifndef bcmp
5265 int
5266 bcmp (b1, b2, length) /* This could be a macro! */
5267 register char *b1;
5268 register char *b2;
5269 register int length;
5270 {
5271 #ifdef VMS
5272 struct dsc$descriptor_s src1 = {length, DSC$K_DTYPE_T, DSC$K_CLASS_S, b1};
5273 struct dsc$descriptor_s src2 = {length, DSC$K_DTYPE_T, DSC$K_CLASS_S, b2};
5274
5275 return STR$COMPARE (&src1, &src2);
5276 #else
5277 while (length-- > 0)
5278 if (*b1++ != *b2++)
5279 return 1;
5280
5281 return 0;
5282 #endif /* not VMS */
5283 }
5284 #endif /* no bcmp */
5285 #endif /* not BSTRING */
5286 \f
5287 #ifndef HAVE_STRSIGNAL
5288 char *
5289 strsignal (code)
5290 int code;
5291 {
5292 char *signame = 0;
5293
5294 if (0 <= code && code < NSIG)
5295 {
5296 #ifdef VMS
5297 signame = sys_errlist[code];
5298 #else
5299 /* Cast to suppress warning if the table has const char *. */
5300 signame = (char *) sys_siglist[code];
5301 #endif
5302 }
5303
5304 return signame;
5305 }
5306 #endif /* HAVE_STRSIGNAL */
5307
5308 /* arch-tag: edb43589-4e09-4544-b325-978b5b121dcf
5309 (do not change this comment) */
Unnamed repository; edit this file 'description' to name the repository.