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Merged in changes from CVS trunk.
[gnu-emacs] / src / sysdep.c
1 /* Interfaces to system-dependent kernel and library entries.
2 Copyright (C) 1985, 86,87,88,93,94,95,1999,2000,01,2003
3 Free Software Foundation, Inc.
4
5 This file is part of GNU Emacs.
6
7 GNU Emacs is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
10 any later version.
11
12 GNU Emacs is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs; see the file COPYING. If not, write to
19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
21
22 #ifdef HAVE_CONFIG_H
23 #include <config.h>
24 #endif
25
26 #include <signal.h>
27 #include <stdio.h>
28 #include <setjmp.h>
29 #ifdef HAVE_UNISTD_H
30 #include <unistd.h>
31 #endif
32 #include "lisp.h"
33 /* Including stdlib.h isn't necessarily enough to get srandom
34 declared, e.g. without __USE_XOPEN_EXTENDED with glibc 2. */
35 #ifdef HAVE_RANDOM
36 #if 0 /* It turns out that defining _OSF_SOURCE in osf5-0.h gets
37 random prototyped as returning `int'. It looks to me as
38 though the best way to DTRT is to prefer the rand48 functions
39 (per libc.info). -- fx */
40 extern long int random P_ ((void));
41 #endif
42 #if 0 /* Don't prototype srandom; it takes an unsigned argument on
43 some systems, and an unsigned long on others, like FreeBSD
44 4.1. */
45 extern void srandom P_ ((unsigned int));
46 #endif
47 #endif
48
49 #include "sysselect.h"
50
51 #include "blockinput.h"
52 #undef NULL
53
54 #ifdef MAC_OS8
55 /* It is essential to include stdlib.h so that this file picks up
56 the correct definitions of rand, srand, and RAND_MAX.
57 Otherwise random numbers will not work correctly. */
58 #include <stdlib.h>
59
60 #ifndef subprocesses
61 /* Nonzero means delete a process right away if it exits (process.c). */
62 static int delete_exited_processes;
63 #endif
64 #endif /* MAC_OS8 */
65
66 #ifdef WINDOWSNT
67 #define read sys_read
68 #define write sys_write
69 #include <windows.h>
70 #ifndef NULL
71 #define NULL 0
72 #endif
73 #endif /* not WINDOWSNT */
74
75 #ifdef HAVE_CARBON
76 #define read sys_read
77 #endif
78
79 /* Does anyone other than VMS need this? */
80 #ifndef fwrite
81 #define sys_fwrite fwrite
82 #else
83 #undef fwrite
84 #endif
85
86 #include <sys/types.h>
87 #include <sys/stat.h>
88 #include <errno.h>
89
90 #ifdef HAVE_SETPGID
91 #if !defined (USG) || defined (BSD_PGRPS)
92 #undef setpgrp
93 #define setpgrp setpgid
94 #endif
95 #endif
96
97 /* Get SI_SRPC_DOMAIN, if it is available. */
98 #ifdef HAVE_SYS_SYSTEMINFO_H
99 #include <sys/systeminfo.h>
100 #endif
101
102 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida, MW Aug 1993 */
103 #include <dos.h>
104 #include "dosfns.h"
105 #include "msdos.h"
106 #include <sys/param.h>
107
108 #if __DJGPP__ > 1
109 extern int etext;
110 extern unsigned start __asm__ ("start");
111 #endif
112 #endif
113
114 #ifndef USE_CRT_DLL
115 #ifndef errno
116 extern int errno;
117 #endif
118 #endif
119
120 #ifdef VMS
121 #include <rms.h>
122 #include <ttdef.h>
123 #include <tt2def.h>
124 #include <iodef.h>
125 #include <ssdef.h>
126 #include <descrip.h>
127 #include <fibdef.h>
128 #include <atrdef.h>
129 #include <ctype.h>
130 #include <string.h>
131 #ifdef __GNUC__
132 #include <sys/file.h>
133 #else
134 #include <file.h>
135 #endif
136 #undef F_SETFL
137 #ifndef RAB$C_BID
138 #include <rab.h>
139 #endif
140 #define MAXIOSIZE (32 * PAGESIZE) /* Don't I/O more than 32 blocks at a time */
141 #endif /* VMS */
142
143 #ifndef VMS
144 #include <sys/file.h>
145 #endif /* not VMS */
146
147 #ifdef HAVE_FCNTL_H
148 #include <fcntl.h>
149 #endif
150
151 #ifndef MSDOS
152 #include <sys/ioctl.h>
153 #endif
154
155 #include "systty.h"
156 #include "syswait.h"
157
158 #ifdef BROKEN_TIOCGWINSZ
159 #undef TIOCGWINSZ
160 #undef TIOCSWINSZ
161 #endif
162
163 #if defined (USG) || defined (DGUX)
164 #include <sys/utsname.h>
165 #ifndef MEMORY_IN_STRING_H
166 #include <memory.h>
167 #endif
168 #if defined (TIOCGWINSZ) || defined (ISC4_0)
169 #ifdef NEED_SIOCTL
170 #include <sys/sioctl.h>
171 #endif
172 #ifdef NEED_PTEM_H
173 #include <sys/stream.h>
174 #include <sys/ptem.h>
175 #endif
176 #endif /* TIOCGWINSZ or ISC4_0 */
177 #endif /* USG or DGUX */
178
179 extern int quit_char;
180
181 #include "keyboard.h"
182 #include "frame.h"
183 #include "window.h"
184 #include "termhooks.h"
185 #include "termchar.h"
186 #include "termopts.h"
187 #include "dispextern.h"
188 #include "process.h"
189 #include "cm.h" /* for reset_sys_modes */
190
191 #ifdef WINDOWSNT
192 #include <direct.h>
193 /* In process.h which conflicts with the local copy. */
194 #define _P_WAIT 0
195 int _CRTAPI1 _spawnlp (int, const char *, const char *, ...);
196 int _CRTAPI1 _getpid (void);
197 #endif
198
199 #ifdef NONSYSTEM_DIR_LIBRARY
200 #include "ndir.h"
201 #endif /* NONSYSTEM_DIR_LIBRARY */
202
203 #include "syssignal.h"
204 #include "systime.h"
205 #ifdef HAVE_UTIME_H
206 #include <utime.h>
207 #endif
208
209 #ifndef HAVE_UTIMES
210 #ifndef HAVE_STRUCT_UTIMBUF
211 /* We want to use utime rather than utimes, but we couldn't find the
212 structure declaration. We'll use the traditional one. */
213 struct utimbuf {
214 long actime;
215 long modtime;
216 };
217 #endif
218 #endif
219
220 /* LPASS8 is new in 4.3, and makes cbreak mode provide all 8 bits. */
221 #ifndef LPASS8
222 #define LPASS8 0
223 #endif
224
225 #ifdef BSD4_1
226 #define LNOFLSH 0100000
227 #endif
228
229 static int baud_convert[] =
230 #ifdef BAUD_CONVERT
231 BAUD_CONVERT;
232 #else
233 {
234 0, 50, 75, 110, 135, 150, 200, 300, 600, 1200,
235 1800, 2400, 4800, 9600, 19200, 38400
236 };
237 #endif
238
239 #ifdef HAVE_SPEED_T
240 #include <termios.h>
241 #else
242 #if defined (HAVE_LIBNCURSES) && ! defined (NCURSES_OSPEED_T)
243 #else
244 #if defined (HAVE_TERMIOS_H) && defined (GNU_LINUX)
245 #include <termios.h>
246 #endif
247 #endif
248 #endif
249
250 int emacs_ospeed;
251
252 void croak P_ ((char *));
253
254 #ifdef AIXHFT
255 void hft_init P_ ((struct tty_display_info *));
256 void hft_reset P_ ((struct tty_display_info *));
257 #endif
258
259 /* Temporary used by `sigblock' when defined in terms of signprocmask. */
260
261 SIGMASKTYPE sigprocmask_set;
262
263 \f
264 /* Discard pending input on all input descriptors. */
265
266 void
267 discard_tty_input ()
268 {
269 #ifndef WINDOWSNT
270 struct emacs_tty buf;
271
272 if (noninteractive)
273 return;
274
275 #ifdef VMS
276 end_kbd_input ();
277 SYS$QIOW (0, fileno (CURTTY()->input), IO$_READVBLK|IO$M_PURGE, input_iosb, 0, 0,
278 &buf.main, 0, 0, terminator_mask, 0, 0);
279 queue_kbd_input ();
280 #else /* not VMS */
281 #ifdef APOLLO
282 {
283 struct tty_display_info *tty;
284 for (tty = tty_list; tty; tty = tty->next)
285 {
286 int zero = 0;
287 if (tty->input)
288 ioctl (fileno (tty->input), TIOCFLUSH, &zero);
289 }
290 }
291 #else /* not Apollo */
292 #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */
293 while (dos_keyread () != -1)
294 ;
295 #else /* not MSDOS */
296 {
297 struct tty_display_info *tty;
298 for (tty = tty_list; tty; tty = tty->next)
299 {
300 if (tty->input) /* Is the device suspended? */
301 {
302 EMACS_GET_TTY (fileno (tty->input), &buf);
303 EMACS_SET_TTY (fileno (tty->input), &buf, 0);
304 }
305 }
306 }
307 #endif /* not MSDOS */
308 #endif /* not Apollo */
309 #endif /* not VMS */
310 #endif /* not WINDOWSNT */
311 }
312
313 \f
314 #ifdef SIGTSTP
315
316 /* Arrange for character C to be read as the next input from
317 the terminal.
318 XXX What if we have multiple ttys?
319 */
320
321 void
322 stuff_char (char c)
323 {
324 if (! FRAME_TERMCAP_P (SELECTED_FRAME ()))
325 return;
326
327 /* Should perhaps error if in batch mode */
328 #ifdef TIOCSTI
329 ioctl (fileno (CURTTY()->input), 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 (int fd)
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$QIOW (0, fd, IO$_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 (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 (fd, &sg);
375 #else
376 ioctl (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 (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 \f
400 /*ARGSUSED*/
401 void
402 set_exclusive_use (fd)
403 int fd;
404 {
405 #ifdef FIOCLEX
406 ioctl (fd, FIOCLEX, 0);
407 #endif
408 /* Ok to do nothing if this feature does not exist */
409 }
410 \f
411 #ifndef subprocesses
412
413 wait_without_blocking ()
414 {
415 #ifdef BSD_SYSTEM
416 wait3 (0, WNOHANG | WUNTRACED, 0);
417 #else
418 croak ("wait_without_blocking");
419 #endif
420 synch_process_alive = 0;
421 }
422
423 #endif /* not subprocesses */
424
425 int wait_debugging; /* Set nonzero to make following function work under dbx
426 (at least for bsd). */
427
428 SIGTYPE
429 wait_for_termination_signal ()
430 {}
431
432 /* Wait for subprocess with process id `pid' to terminate and
433 make sure it will get eliminated (not remain forever as a zombie) */
434
435 void
436 wait_for_termination (pid)
437 int pid;
438 {
439 while (1)
440 {
441 #ifdef subprocesses
442 #ifdef VMS
443 int status;
444
445 status = SYS$FORCEX (&pid, 0, 0);
446 break;
447 #else /* not VMS */
448 #if defined (BSD_SYSTEM) || (defined (HPUX) && !defined (HPUX_5))
449 /* Note that kill returns -1 even if the process is just a zombie now.
450 But inevitably a SIGCHLD interrupt should be generated
451 and child_sig will do wait3 and make the process go away. */
452 /* There is some indication that there is a bug involved with
453 termination of subprocesses, perhaps involving a kernel bug too,
454 but no idea what it is. Just as a hunch we signal SIGCHLD to see
455 if that causes the problem to go away or get worse. */
456 sigsetmask (sigmask (SIGCHLD));
457 if (0 > kill (pid, 0))
458 {
459 sigsetmask (SIGEMPTYMASK);
460 kill (getpid (), SIGCHLD);
461 break;
462 }
463 if (wait_debugging)
464 sleep (1);
465 else
466 sigpause (SIGEMPTYMASK);
467 #else /* not BSD_SYSTEM, and not HPUX version >= 6 */
468 #if defined (UNIPLUS)
469 if (0 > kill (pid, 0))
470 break;
471 wait (0);
472 #else /* neither BSD_SYSTEM nor UNIPLUS: random sysV */
473 #ifdef POSIX_SIGNALS /* would this work for GNU/Linux as well? */
474 sigblock (sigmask (SIGCHLD));
475 errno = 0;
476 if (kill (pid, 0) == -1 && errno == ESRCH)
477 {
478 sigunblock (sigmask (SIGCHLD));
479 break;
480 }
481
482 sigsuspend (&empty_mask);
483 #else /* not POSIX_SIGNALS */
484 #ifdef HAVE_SYSV_SIGPAUSE
485 sighold (SIGCHLD);
486 if (0 > kill (pid, 0))
487 {
488 sigrelse (SIGCHLD);
489 break;
490 }
491 sigpause (SIGCHLD);
492 #else /* not HAVE_SYSV_SIGPAUSE */
493 #ifdef WINDOWSNT
494 wait (0);
495 break;
496 #else /* not WINDOWSNT */
497 if (0 > kill (pid, 0))
498 break;
499 /* Using sleep instead of pause avoids timing error.
500 If the inferior dies just before the sleep,
501 we lose just one second. */
502 sleep (1);
503 #endif /* not WINDOWSNT */
504 #endif /* not HAVE_SYSV_SIGPAUSE */
505 #endif /* not POSIX_SIGNALS */
506 #endif /* not UNIPLUS */
507 #endif /* not BSD_SYSTEM, and not HPUX version >= 6 */
508 #endif /* not VMS */
509 #else /* not subprocesses */
510 #if __DJGPP__ > 1
511 break;
512 #else /* not __DJGPP__ > 1 */
513 #ifndef BSD4_1
514 if (kill (pid, 0) < 0)
515 break;
516 wait (0);
517 #else /* BSD4_1 */
518 int status;
519 status = wait (0);
520 if (status == pid || status == -1)
521 break;
522 #endif /* BSD4_1 */
523 #endif /* not __DJGPP__ > 1*/
524 #endif /* not subprocesses */
525 }
526 }
527
528 #ifdef subprocesses
529
530 /*
531 * flush any pending output
532 * (may flush input as well; it does not matter the way we use it)
533 */
534
535 void
536 flush_pending_output (channel)
537 int channel;
538 {
539 #ifdef HAVE_TERMIOS
540 /* If we try this, we get hit with SIGTTIN, because
541 the child's tty belongs to the child's pgrp. */
542 #else
543 #ifdef TCFLSH
544 ioctl (channel, TCFLSH, 1);
545 #else
546 #ifdef TIOCFLUSH
547 int zero = 0;
548 /* 3rd arg should be ignored
549 but some 4.2 kernels actually want the address of an int
550 and nonzero means something different. */
551 ioctl (channel, TIOCFLUSH, &zero);
552 #endif
553 #endif
554 #endif
555 }
556 \f
557 #ifndef VMS
558 /* Set up the terminal at the other end of a pseudo-terminal that
559 we will be controlling an inferior through.
560 It should not echo or do line-editing, since that is done
561 in Emacs. No padding needed for insertion into an Emacs buffer. */
562
563 void
564 child_setup_tty (out)
565 int out;
566 {
567 #ifndef DOS_NT
568 struct emacs_tty s;
569
570 EMACS_GET_TTY (out, &s);
571
572 #if defined (HAVE_TERMIO) || defined (HAVE_TERMIOS)
573 s.main.c_oflag |= OPOST; /* Enable output postprocessing */
574 s.main.c_oflag &= ~ONLCR; /* Disable map of NL to CR-NL on output */
575 #ifdef NLDLY
576 s.main.c_oflag &= ~(NLDLY|CRDLY|TABDLY|BSDLY|VTDLY|FFDLY);
577 /* No output delays */
578 #endif
579 s.main.c_lflag &= ~ECHO; /* Disable echo */
580 s.main.c_lflag |= ISIG; /* Enable signals */
581 #if 0 /* This causes bugs in (for instance) telnet to certain sites. */
582 s.main.c_iflag &= ~ICRNL; /* Disable map of CR to NL on input */
583 #ifdef INLCR /* Just being cautious, since I can't check how
584 widespread INLCR is--rms. */
585 s.main.c_iflag &= ~INLCR; /* Disable map of NL to CR on input */
586 #endif
587 #endif
588 #ifdef IUCLC
589 s.main.c_iflag &= ~IUCLC; /* Disable downcasing on input. */
590 #endif
591 #ifdef ISTRIP
592 s.main.c_iflag &= ~ISTRIP; /* don't strip 8th bit on input */
593 #endif
594 #ifdef OLCUC
595 s.main.c_oflag &= ~OLCUC; /* Disable upcasing on output. */
596 #endif
597 s.main.c_oflag &= ~TAB3; /* Disable tab expansion */
598 s.main.c_cflag = (s.main.c_cflag & ~CSIZE) | CS8; /* Don't strip 8th bit */
599 #if 0
600 /* Said to be unnecessary: */
601 s.main.c_cc[VMIN] = 1; /* minimum number of characters to accept */
602 s.main.c_cc[VTIME] = 0; /* wait forever for at least 1 character */
603 #endif
604
605 s.main.c_lflag |= ICANON; /* Enable erase/kill and eof processing */
606 s.main.c_cc[VEOF] = 04; /* insure that EOF is Control-D */
607 s.main.c_cc[VERASE] = CDISABLE; /* disable erase processing */
608 s.main.c_cc[VKILL] = CDISABLE; /* disable kill processing */
609
610 #ifdef HPUX
611 s.main.c_cflag = (s.main.c_cflag & ~CBAUD) | B9600; /* baud rate sanity */
612 #endif /* HPUX */
613
614 #ifdef AIX
615 /* AIX enhanced edit loses NULs, so disable it */
616 #ifndef IBMR2AIX
617 s.main.c_line = 0;
618 s.main.c_iflag &= ~ASCEDIT;
619 #endif
620 /* Also, PTY overloads NUL and BREAK.
621 don't ignore break, but don't signal either, so it looks like NUL. */
622 s.main.c_iflag &= ~IGNBRK;
623 s.main.c_iflag &= ~BRKINT;
624 /* QUIT and INTR work better as signals, so disable character forms */
625 s.main.c_cc[VINTR] = 0377;
626 #ifdef SIGNALS_VIA_CHARACTERS
627 /* the QUIT and INTR character are used in process_send_signal
628 so set them here to something useful. */
629 if (s.main.c_cc[VQUIT] == 0377)
630 s.main.c_cc[VQUIT] = '\\'&037; /* Control-\ */
631 if (s.main.c_cc[VINTR] == 0377)
632 s.main.c_cc[VINTR] = 'C'&037; /* Control-C */
633 #else /* no TIOCGPGRP or no TIOCGLTC or no TIOCGETC */
634 /* QUIT and INTR work better as signals, so disable character forms */
635 s.main.c_cc[VQUIT] = 0377;
636 s.main.c_cc[VINTR] = 0377;
637 s.main.c_lflag &= ~ISIG;
638 #endif /* no TIOCGPGRP or no TIOCGLTC or no TIOCGETC */
639 s.main.c_cc[VEOL] = 0377;
640 s.main.c_cflag = (s.main.c_cflag & ~CBAUD) | B9600; /* baud rate sanity */
641 #endif /* AIX */
642
643 #else /* not HAVE_TERMIO */
644
645 s.main.sg_flags &= ~(ECHO | CRMOD | ANYP | ALLDELAY | RAW | LCASE
646 | CBREAK | TANDEM);
647 s.main.sg_flags |= LPASS8;
648 s.main.sg_erase = 0377;
649 s.main.sg_kill = 0377;
650 s.lmode = LLITOUT | s.lmode; /* Don't strip 8th bit */
651
652 #endif /* not HAVE_TERMIO */
653
654 EMACS_SET_TTY (out, &s, 0);
655
656 #ifdef BSD4_1
657 if (interrupt_input)
658 reset_sigio (0);
659 #endif /* BSD4_1 */
660 #ifdef RTU
661 {
662 int zero = 0;
663 ioctl (out, FIOASYNC, &zero);
664 }
665 #endif /* RTU */
666 #endif /* not DOS_NT */
667 }
668 #endif /* not VMS */
669
670 #endif /* subprocesses */
671 \f
672 /* Record a signal code and the handler for it. */
673 struct save_signal
674 {
675 int code;
676 SIGTYPE (*handler) P_ ((int));
677 };
678
679 static void save_signal_handlers P_ ((struct save_signal *));
680 static void restore_signal_handlers P_ ((struct save_signal *));
681
682 /* Suspend the Emacs process; give terminal to its superior. */
683
684 void
685 sys_suspend ()
686 {
687 #ifdef VMS
688 /* "Foster" parentage allows emacs to return to a subprocess that attached
689 to the current emacs as a cheaper than starting a whole new process. This
690 is set up by KEPTEDITOR.COM. */
691 unsigned long parent_id, foster_parent_id;
692 char *fpid_string;
693
694 fpid_string = getenv ("EMACS_PARENT_PID");
695 if (fpid_string != NULL)
696 {
697 sscanf (fpid_string, "%x", &foster_parent_id);
698 if (foster_parent_id != 0)
699 parent_id = foster_parent_id;
700 else
701 parent_id = getppid ();
702 }
703 else
704 parent_id = getppid ();
705
706 xfree (fpid_string); /* On VMS, this was malloc'd */
707
708 if (parent_id && parent_id != 0xffffffff)
709 {
710 SIGTYPE (*oldsig)() = (int) signal (SIGINT, SIG_IGN);
711 int status = LIB$ATTACH (&parent_id) & 1;
712 signal (SIGINT, oldsig);
713 return status;
714 }
715 else
716 {
717 struct {
718 int l;
719 char *a;
720 } d_prompt;
721 d_prompt.l = sizeof ("Emacs: "); /* Our special prompt */
722 d_prompt.a = "Emacs: "; /* Just a reminder */
723 LIB$SPAWN (0, 0, 0, 0, 0, 0, 0, 0, 0, 0, &d_prompt, 0);
724 return 1;
725 }
726 return -1;
727 #else
728 #if defined (SIGTSTP) && !defined (MSDOS)
729
730 {
731 int pgrp = EMACS_GETPGRP (0);
732 EMACS_KILLPG (pgrp, SIGTSTP);
733 }
734
735 #else /* No SIGTSTP */
736 #ifdef USG_JOBCTRL /* If you don't know what this is don't mess with it */
737 ptrace (0, 0, 0, 0); /* set for ptrace - caught by csh */
738 kill (getpid (), SIGQUIT);
739
740 #else /* No SIGTSTP or USG_JOBCTRL */
741
742 /* On a system where suspending is not implemented,
743 instead fork a subshell and let it talk directly to the terminal
744 while we wait. */
745 sys_subshell ();
746
747 #endif /* no USG_JOBCTRL */
748 #endif /* no SIGTSTP */
749 #endif /* not VMS */
750 }
751
752 /* Fork a subshell. */
753
754 #ifndef MAC_OS8
755 void
756 sys_subshell ()
757 {
758 #ifndef VMS
759 #ifdef DOS_NT /* Demacs 1.1.2 91/10/20 Manabu Higashida */
760 int st;
761 char oldwd[MAXPATHLEN+1]; /* Fixed length is safe on MSDOS. */
762 #endif
763 int pid;
764 struct save_signal saved_handlers[5];
765 Lisp_Object dir;
766 unsigned char *str = 0;
767 int len;
768
769 saved_handlers[0].code = SIGINT;
770 saved_handlers[1].code = SIGQUIT;
771 saved_handlers[2].code = SIGTERM;
772 #ifdef SIGIO
773 saved_handlers[3].code = SIGIO;
774 saved_handlers[4].code = 0;
775 #else
776 saved_handlers[3].code = 0;
777 #endif
778
779 /* Mentioning current_buffer->buffer would mean including buffer.h,
780 which somehow wedges the hp compiler. So instead... */
781
782 dir = intern ("default-directory");
783 if (NILP (Fboundp (dir)))
784 goto xyzzy;
785 dir = Fsymbol_value (dir);
786 if (!STRINGP (dir))
787 goto xyzzy;
788
789 dir = expand_and_dir_to_file (Funhandled_file_name_directory (dir), Qnil);
790 str = (unsigned char *) alloca (SCHARS (dir) + 2);
791 len = SCHARS (dir);
792 bcopy (SDATA (dir), str, len);
793 if (str[len - 1] != '/') str[len++] = '/';
794 str[len] = 0;
795 xyzzy:
796
797 #ifdef DOS_NT
798 pid = 0;
799 #if __DJGPP__ > 1
800 save_signal_handlers (saved_handlers);
801 synch_process_alive = 1;
802 #endif /* __DJGPP__ > 1 */
803 #else
804 pid = vfork ();
805 if (pid == -1)
806 error ("Can't spawn subshell");
807 #endif
808
809 if (pid == 0)
810 {
811 char *sh = 0;
812
813 #ifdef DOS_NT /* MW, Aug 1993 */
814 getwd (oldwd);
815 if (sh == 0)
816 sh = (char *) egetenv ("SUSPEND"); /* KFS, 1994-12-14 */
817 #endif
818 if (sh == 0)
819 sh = (char *) egetenv ("SHELL");
820 if (sh == 0)
821 sh = "sh";
822
823 /* Use our buffer's default directory for the subshell. */
824 if (str)
825 chdir ((char *) str);
826
827 #ifdef subprocesses
828 close_process_descs (); /* Close Emacs's pipes/ptys */
829 #endif
830
831 #ifdef SET_EMACS_PRIORITY
832 {
833 extern EMACS_INT emacs_priority;
834
835 if (emacs_priority < 0)
836 nice (-emacs_priority);
837 }
838 #endif
839
840 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */
841 {
842 char *epwd = getenv ("PWD");
843 char old_pwd[MAXPATHLEN+1+4];
844
845 /* If PWD is set, pass it with corrected value. */
846 if (epwd)
847 {
848 strcpy (old_pwd, epwd);
849 if (str[len - 1] == '/')
850 str[len - 1] = '\0';
851 setenv ("PWD", str, 1);
852 }
853 st = system (sh);
854 chdir (oldwd);
855 if (epwd)
856 putenv (old_pwd); /* restore previous value */
857 }
858 #if 0 /* This is also reported if last command executed in subshell failed, KFS */
859 if (st)
860 report_file_error ("Can't execute subshell", Fcons (build_string (sh), Qnil));
861 #endif
862 #else /* not MSDOS */
863 #ifdef WINDOWSNT
864 /* Waits for process completion */
865 pid = _spawnlp (_P_WAIT, sh, sh, NULL);
866 chdir (oldwd);
867 if (pid == -1)
868 write (1, "Can't execute subshell", 22);
869 #else /* not WINDOWSNT */
870 execlp (sh, sh, 0);
871 write (1, "Can't execute subshell", 22);
872 _exit (1);
873 #endif /* not WINDOWSNT */
874 #endif /* not MSDOS */
875 }
876
877 /* Do this now if we did not do it before. */
878 #if !defined (MSDOS) || __DJGPP__ == 1
879 save_signal_handlers (saved_handlers);
880 synch_process_alive = 1;
881 #endif
882
883 #ifndef DOS_NT
884 wait_for_termination (pid);
885 #endif
886 restore_signal_handlers (saved_handlers);
887 synch_process_alive = 0;
888 #endif /* !VMS */
889 }
890 #endif /* !MAC_OS8 */
891
892 static void
893 save_signal_handlers (saved_handlers)
894 struct save_signal *saved_handlers;
895 {
896 while (saved_handlers->code)
897 {
898 saved_handlers->handler
899 = (SIGTYPE (*) P_ ((int))) signal (saved_handlers->code, SIG_IGN);
900 saved_handlers++;
901 }
902 }
903
904 static void
905 restore_signal_handlers (saved_handlers)
906 struct save_signal *saved_handlers;
907 {
908 while (saved_handlers->code)
909 {
910 signal (saved_handlers->code, saved_handlers->handler);
911 saved_handlers++;
912 }
913 }
914 \f
915 #ifndef SIGIO
916 /* If SIGIO is broken, don't do anything. */
917 void
918 init_sigio (int fd)
919 {
920 }
921
922 void
923 reset_sigio (int fd)
924 {
925 }
926
927 void
928 request_sigio (void)
929 {
930 }
931
932 void
933 unrequest_sigio (void)
934 {
935 }
936
937 #else
938 #ifdef F_SETFL
939
940 int old_fcntl_flags[MAXDESC];
941
942 void
943 init_sigio (fd)
944 int fd;
945 {
946 #ifdef FASYNC
947 old_fcntl_flags[fd] = fcntl (fd, F_GETFL, 0) & ~FASYNC;
948 fcntl (fd, F_SETFL, old_fcntl_flags[fd] | FASYNC);
949 #endif
950 interrupts_deferred = 0;
951 }
952
953 void
954 reset_sigio (fd)
955 int fd;
956 {
957 #ifdef FASYNC
958 fcntl (fd, F_SETFL, old_fcntl_flags[fd]);
959 #endif
960 }
961
962 #ifdef FASYNC /* F_SETFL does not imply existence of FASYNC */
963 /* XXX Uhm, FASYNC is not used anymore here. */
964
965 void
966 request_sigio ()
967 {
968 /* XXX read_socket_hook is not global anymore. Is blocking SIGIO
969 bad under X? */
970 #if 0
971 if (read_socket_hook)
972 return;
973 #endif
974
975 #ifdef SIGWINCH
976 sigunblock (sigmask (SIGWINCH));
977 #endif
978 sigunblock (sigmask (SIGIO));
979
980 interrupts_deferred = 0;
981 }
982
983 void
984 unrequest_sigio (void)
985 {
986 /* XXX read_socket_hook is not global anymore. Is blocking SIGIO
987 bad under X? */
988 #if 0
989 if (read_socket_hook)
990 return;
991 #endif
992
993 #ifdef SIGWINCH
994 sigblock (sigmask (SIGWINCH));
995 #endif
996 sigblock (sigmask (SIGIO));
997 interrupts_deferred = 1;
998 }
999
1000 #else /* no FASYNC */
1001 #ifdef STRIDE /* Stride doesn't have FASYNC - use FIOASYNC */
1002
1003 void
1004 request_sigio ()
1005 {
1006 int on = 1;
1007
1008 if (read_socket_hook)
1009 return;
1010
1011 /* XXX CURTTY() is bogus here. */
1012 ioctl (fileno (CURTTY ()->input), FIOASYNC, &on);
1013 interrupts_deferred = 0;
1014 }
1015
1016 void
1017 unrequest_sigio ()
1018 {
1019 int off = 0;
1020
1021 if (read_socket_hook)
1022 return;
1023
1024 /* XXX CURTTY() is bogus here. */
1025 ioctl (fileno (CURTTY ()->input), FIOASYNC, &off);
1026 interrupts_deferred = 1;
1027 }
1028
1029 #else /* not FASYNC, not STRIDE */
1030
1031 #ifdef _CX_UX
1032
1033 #include <termios.h>
1034
1035 void
1036 request_sigio ()
1037 {
1038 int on = 1;
1039 sigset_t st;
1040
1041 if (read_socket_hook)
1042 return;
1043
1044 sigemptyset (&st);
1045 sigaddset (&st, SIGIO);
1046 ioctl (0, FIOASYNC, &on); /* XXX This fails for multiple ttys. */
1047 interrupts_deferred = 0;
1048 sigprocmask (SIG_UNBLOCK, &st, (sigset_t *)0);
1049 }
1050
1051 void
1052 unrequest_sigio ()
1053 {
1054 int off = 0;
1055
1056 if (read_socket_hook)
1057 return;
1058
1059 ioctl (0, FIOASYNC, &off); /* XXX This fails for multiple ttys. */
1060 interrupts_deferred = 1;
1061 }
1062
1063 #else /* ! _CX_UX */
1064 #ifndef MSDOS
1065
1066 void
1067 request_sigio ()
1068 {
1069 if (read_socket_hook)
1070 return;
1071
1072 croak ("request_sigio");
1073 }
1074
1075 void
1076 unrequest_sigio ()
1077 {
1078 if (read_socket_hook)
1079 return;
1080
1081 croak ("unrequest_sigio");
1082 }
1083
1084 #endif /* MSDOS */
1085 #endif /* _CX_UX */
1086 #endif /* STRIDE */
1087 #endif /* FASYNC */
1088 #endif /* F_SETFL */
1089 #endif /* SIGIO */
1090 \f
1091 /* Saving and restoring the process group of Emacs's terminal. */
1092
1093 #ifdef BSD_PGRPS
1094
1095 /* The process group of which Emacs was a member when it initially
1096 started.
1097
1098 If Emacs was in its own process group (i.e. inherited_pgroup ==
1099 getpid ()), then we know we're running under a shell with job
1100 control (Emacs would never be run as part of a pipeline).
1101 Everything is fine.
1102
1103 If Emacs was not in its own process group, then we know we're
1104 running under a shell (or a caller) that doesn't know how to
1105 separate itself from Emacs (like sh). Emacs must be in its own
1106 process group in order to receive SIGIO correctly. In this
1107 situation, we put ourselves in our own pgroup, forcibly set the
1108 tty's pgroup to our pgroup, and make sure to restore and reinstate
1109 the tty's pgroup just like any other terminal setting. If
1110 inherited_group was not the tty's pgroup, then we'll get a
1111 SIGTTmumble when we try to change the tty's pgroup, and a CONT if
1112 it goes foreground in the future, which is what should happen.
1113
1114 This variable is initialized in emacs.c. */
1115 int inherited_pgroup;
1116
1117 /* Split off the foreground process group to Emacs alone. When we are
1118 in the foreground, but not started in our own process group,
1119 redirect the tty device handle FD to point to our own process
1120 group. We need to be in our own process group to receive SIGIO
1121 properly. */
1122 void
1123 narrow_foreground_group (int fd)
1124 {
1125 int me = getpid ();
1126
1127 setpgrp (0, inherited_pgroup);
1128 if (! inherited_pgroup)
1129 abort (); /* Should not happen. */
1130 if (inherited_pgroup != me)
1131 EMACS_SET_TTY_PGRP (fd, &me); /* XXX This only works on the controlling tty. */
1132 setpgrp (0, me);
1133 }
1134
1135 /* Set the tty to our original foreground group. */
1136 void
1137 widen_foreground_group (int fd)
1138 {
1139 if (inherited_pgroup != getpid ())
1140 EMACS_SET_TTY_PGRP (fd, &inherited_pgroup);
1141 setpgrp (0, inherited_pgroup);
1142 }
1143
1144 #endif /* BSD_PGRPS */
1145 \f
1146 /* Getting and setting emacs_tty structures. */
1147
1148 /* Set *TC to the parameters associated with the terminal FD.
1149 Return zero if all's well, or -1 if we ran into an error we
1150 couldn't deal with. */
1151 int
1152 emacs_get_tty (fd, settings)
1153 int fd;
1154 struct emacs_tty *settings;
1155 {
1156 /* Retrieve the primary parameters - baud rate, character size, etcetera. */
1157 #ifdef HAVE_TCATTR
1158 /* We have those nifty POSIX tcmumbleattr functions. */
1159 bzero (&settings->main, sizeof (settings->main));
1160 if (tcgetattr (fd, &settings->main) < 0)
1161 return -1;
1162
1163 #else
1164 #ifdef HAVE_TERMIO
1165 /* The SYSV-style interface? */
1166 if (ioctl (fd, TCGETA, &settings->main) < 0)
1167 return -1;
1168
1169 #else
1170 #ifdef VMS
1171 /* Vehemently Monstrous System? :-) */
1172 if (! (SYS$QIOW (0, fd, IO$_SENSEMODE, settings, 0, 0,
1173 &settings->main.class, 12, 0, 0, 0, 0)
1174 & 1))
1175 return -1;
1176
1177 #else
1178 #ifndef DOS_NT
1179 /* I give up - I hope you have the BSD ioctls. */
1180 if (ioctl (fd, TIOCGETP, &settings->main) < 0)
1181 return -1;
1182 #endif /* not DOS_NT */
1183 #endif
1184 #endif
1185 #endif
1186
1187 /* Suivant - Do we have to get struct ltchars data? */
1188 #ifdef HAVE_LTCHARS
1189 if (ioctl (fd, TIOCGLTC, &settings->ltchars) < 0)
1190 return -1;
1191 #endif
1192
1193 /* How about a struct tchars and a wordful of lmode bits? */
1194 #ifdef HAVE_TCHARS
1195 if (ioctl (fd, TIOCGETC, &settings->tchars) < 0
1196 || ioctl (fd, TIOCLGET, &settings->lmode) < 0)
1197 return -1;
1198 #endif
1199
1200 /* We have survived the tempest. */
1201 return 0;
1202 }
1203
1204
1205 /* Set the parameters of the tty on FD according to the contents of
1206 *SETTINGS. If FLUSHP is non-zero, we discard input.
1207 Return 0 if all went well, and -1 if anything failed. */
1208
1209 int
1210 emacs_set_tty (fd, settings, flushp)
1211 int fd;
1212 struct emacs_tty *settings;
1213 int flushp;
1214 {
1215 /* Set the primary parameters - baud rate, character size, etcetera. */
1216 #ifdef HAVE_TCATTR
1217 int i;
1218 /* We have those nifty POSIX tcmumbleattr functions.
1219 William J. Smith <wjs@wiis.wang.com> writes:
1220 "POSIX 1003.1 defines tcsetattr to return success if it was
1221 able to perform any of the requested actions, even if some
1222 of the requested actions could not be performed.
1223 We must read settings back to ensure tty setup properly.
1224 AIX requires this to keep tty from hanging occasionally." */
1225 /* This make sure that we don't loop indefinitely in here. */
1226 for (i = 0 ; i < 10 ; i++)
1227 if (tcsetattr (fd, flushp ? TCSAFLUSH : TCSADRAIN, &settings->main) < 0)
1228 {
1229 if (errno == EINTR)
1230 continue;
1231 else
1232 return -1;
1233 }
1234 else
1235 {
1236 struct termios new;
1237
1238 bzero (&new, sizeof (new));
1239 /* Get the current settings, and see if they're what we asked for. */
1240 tcgetattr (fd, &new);
1241 /* We cannot use memcmp on the whole structure here because under
1242 * aix386 the termios structure has some reserved field that may
1243 * not be filled in.
1244 */
1245 if ( new.c_iflag == settings->main.c_iflag
1246 && new.c_oflag == settings->main.c_oflag
1247 && new.c_cflag == settings->main.c_cflag
1248 && new.c_lflag == settings->main.c_lflag
1249 && memcmp (new.c_cc, settings->main.c_cc, NCCS) == 0)
1250 break;
1251 else
1252 continue;
1253 }
1254
1255 #else
1256 #ifdef HAVE_TERMIO
1257 /* The SYSV-style interface? */
1258 if (ioctl (fd, flushp ? TCSETAF : TCSETAW, &settings->main) < 0)
1259 return -1;
1260
1261 #else
1262 #ifdef VMS
1263 /* Vehemently Monstrous System? :-) */
1264 if (! (SYS$QIOW (0, fd, IO$_SETMODE, &input_iosb, 0, 0,
1265 &settings->main.class, 12, 0, 0, 0, 0)
1266 & 1))
1267 return -1;
1268
1269 #else
1270 #ifndef DOS_NT
1271 /* I give up - I hope you have the BSD ioctls. */
1272 if (ioctl (fd, (flushp) ? TIOCSETP : TIOCSETN, &settings->main) < 0)
1273 return -1;
1274 #endif /* not DOS_NT */
1275
1276 #endif
1277 #endif
1278 #endif
1279
1280 /* Suivant - Do we have to get struct ltchars data? */
1281 #ifdef HAVE_LTCHARS
1282 if (ioctl (fd, TIOCSLTC, &settings->ltchars) < 0)
1283 return -1;
1284 #endif
1285
1286 /* How about a struct tchars and a wordful of lmode bits? */
1287 #ifdef HAVE_TCHARS
1288 if (ioctl (fd, TIOCSETC, &settings->tchars) < 0
1289 || ioctl (fd, TIOCLSET, &settings->lmode) < 0)
1290 return -1;
1291 #endif
1292
1293 /* We have survived the tempest. */
1294 return 0;
1295 }
1296
1297 \f
1298
1299 #ifdef BSD4_1
1300 /* BSD 4.1 needs to keep track of the lmode bits in order to start
1301 sigio. */
1302 int lmode;
1303 #endif
1304
1305 #ifndef F_SETOWN_BUG
1306 #ifdef F_SETOWN
1307 int old_fcntl_owner[MAXDESC];
1308 #endif /* F_SETOWN */
1309 #endif /* F_SETOWN_BUG */
1310
1311 /* This may also be defined in stdio,
1312 but if so, this does no harm,
1313 and using the same name avoids wasting the other one's space. */
1314
1315 #ifdef nec_ews_svr4
1316 extern char *_sobuf ;
1317 #else
1318 #if defined (USG) || defined (DGUX)
1319 unsigned char _sobuf[BUFSIZ+8];
1320 #else
1321 char _sobuf[BUFSIZ];
1322 #endif
1323 #endif
1324
1325 #ifdef HAVE_LTCHARS
1326 static struct ltchars new_ltchars = {-1,-1,-1,-1,-1,-1};
1327 #endif
1328 #ifdef HAVE_TCHARS
1329 static struct tchars new_tchars = {-1,-1,-1,-1,-1,-1};
1330 #endif
1331
1332 /* Initialize the terminal mode on all tty devices that are currently
1333 open. */
1334
1335 void
1336 init_all_sys_modes (void)
1337 {
1338 struct tty_display_info *tty;
1339 for (tty = tty_list; tty; tty = tty->next)
1340 init_sys_modes (tty);
1341 }
1342
1343 /* Initialize the terminal mode on the given tty device. */
1344
1345 void
1346 init_sys_modes (tty_out)
1347 struct tty_display_info *tty_out;
1348 {
1349 struct emacs_tty tty;
1350
1351 #ifdef MAC_OS8
1352 /* cus-start.el complains if delete-exited-processes is not defined */
1353 #ifndef subprocesses
1354 DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes,
1355 doc: /* *Non-nil means delete processes immediately when they exit.
1356 nil means don't delete them until `list-processes' is run. */);
1357 delete_exited_processes = 0;
1358 #endif
1359 #endif /* MAC_OS8 */
1360
1361 #ifdef VMS
1362 #if 0
1363 static int oob_chars[2] = {0, 1 << 7}; /* catch C-g's */
1364 extern int (*interrupt_signal) ();
1365 #endif
1366 #endif
1367
1368 Vtty_erase_char = Qnil;
1369
1370 if (noninteractive)
1371 return;
1372
1373 if (!tty_out->output)
1374 return; /* The tty is suspended. */
1375
1376 #ifdef VMS
1377 if (!input_ef)
1378 input_ef = get_kbd_event_flag ();
1379 /* LIB$GET_EF (&input_ef); */
1380 SYS$CLREF (input_ef);
1381 waiting_for_ast = 0;
1382 if (!timer_ef)
1383 timer_ef = get_timer_event_flag ();
1384 /* LIB$GET_EF (&timer_ef); */
1385 SYS$CLREF (timer_ef);
1386 #if 0
1387 if (!process_ef)
1388 {
1389 LIB$GET_EF (&process_ef);
1390 SYS$CLREF (process_ef);
1391 }
1392 if (input_ef / 32 != process_ef / 32)
1393 croak ("Input and process event flags in different clusters.");
1394 #endif
1395 if (input_ef / 32 != timer_ef / 32)
1396 croak ("Input and timer event flags in different clusters.");
1397 #if 0
1398 input_eflist = ((unsigned) 1 << (input_ef % 32)) |
1399 ((unsigned) 1 << (process_ef % 32));
1400 #endif
1401 timer_eflist = ((unsigned) 1 << (input_ef % 32)) |
1402 ((unsigned) 1 << (timer_ef % 32));
1403 #ifndef VMS4_4
1404 sys_access_reinit ();
1405 #endif
1406 #endif /* VMS */
1407
1408 #ifdef BSD_PGRPS
1409 #if 0
1410 /* read_socket_hook is not global anymore. I think doing this
1411 unconditionally will not cause any problems. */
1412 if (! read_socket_hook && EQ (Vinitial_window_system, Qnil))
1413 #endif
1414 narrow_foreground_group (fileno (tty_out->input));
1415 #endif
1416
1417 if (! tty_out->old_tty)
1418 tty_out->old_tty = (struct emacs_tty *) xmalloc (sizeof (struct emacs_tty));
1419
1420 EMACS_GET_TTY (fileno (tty_out->input), tty_out->old_tty);
1421
1422 tty = *tty_out->old_tty;
1423
1424 #if defined (HAVE_TERMIO) || defined (HAVE_TERMIOS)
1425 XSETINT (Vtty_erase_char, tty.main.c_cc[VERASE]);
1426
1427 #ifdef DGUX
1428 /* This allows meta to be sent on 8th bit. */
1429 tty.main.c_iflag &= ~INPCK; /* don't check input for parity */
1430 #endif
1431 tty.main.c_iflag |= (IGNBRK); /* Ignore break condition */
1432 tty.main.c_iflag &= ~ICRNL; /* Disable map of CR to NL on input */
1433 #ifdef INLCR /* I'm just being cautious,
1434 since I can't check how widespread INLCR is--rms. */
1435 tty.main.c_iflag &= ~INLCR; /* Disable map of NL to CR on input */
1436 #endif
1437 #ifdef ISTRIP
1438 tty.main.c_iflag &= ~ISTRIP; /* don't strip 8th bit on input */
1439 #endif
1440 tty.main.c_lflag &= ~ECHO; /* Disable echo */
1441 tty.main.c_lflag &= ~ICANON; /* Disable erase/kill processing */
1442 #ifdef IEXTEN
1443 tty.main.c_lflag &= ~IEXTEN; /* Disable other editing characters. */
1444 #endif
1445 tty.main.c_lflag |= ISIG; /* Enable signals */
1446 if (tty_out->flow_control)
1447 {
1448 tty.main.c_iflag |= IXON; /* Enable start/stop output control */
1449 #ifdef IXANY
1450 tty.main.c_iflag &= ~IXANY;
1451 #endif /* IXANY */
1452 }
1453 else
1454 tty.main.c_iflag &= ~IXON; /* Disable start/stop output control */
1455 tty.main.c_oflag &= ~ONLCR; /* Disable map of NL to CR-NL
1456 on output */
1457 tty.main.c_oflag &= ~TAB3; /* Disable tab expansion */
1458 #ifdef CS8
1459 if (tty_out->meta_key)
1460 {
1461 tty.main.c_cflag |= CS8; /* allow 8th bit on input */
1462 tty.main.c_cflag &= ~PARENB;/* Don't check parity */
1463 }
1464 #endif
1465 if (tty_out->input == stdin)
1466 {
1467 tty.main.c_cc[VINTR] = quit_char; /* C-g (usually) gives SIGINT */
1468 /* Set up C-g for both SIGQUIT and SIGINT.
1469 We don't know which we will get, but we handle both alike
1470 so which one it really gives us does not matter. */
1471 tty.main.c_cc[VQUIT] = quit_char;
1472 }
1473 else
1474 {
1475 /* We normally don't get interrupt or quit signals from tty
1476 devices other than our controlling terminal; therefore,
1477 we must handle C-g as normal input. Unfortunately, this
1478 means that the interrupt and quit feature must be
1479 disabled on secondary ttys, or we would not even see the
1480 keypress.
1481
1482 Note that even though emacsclient could have special code
1483 to pass SIGINT to Emacs, we should _not_ enable
1484 interrupt/quit keys for emacsclient frames. This means
1485 that we can't break out of loops in C code from a
1486 secondary tty frame, but we can always decide what
1487 display the C-g came from, which is more important from a
1488 usability point of view. (Consider the case when two
1489 people work together using the same Emacs instance.) */
1490 tty.main.c_cc[VINTR] = CDISABLE;
1491 tty.main.c_cc[VQUIT] = CDISABLE;
1492 }
1493 tty.main.c_cc[VMIN] = 1; /* Input should wait for at least 1 char */
1494 tty.main.c_cc[VTIME] = 0; /* no matter how long that takes. */
1495 #ifdef VSWTCH
1496 tty.main.c_cc[VSWTCH] = CDISABLE; /* Turn off shell layering use
1497 of C-z */
1498 #endif /* VSWTCH */
1499
1500 #if defined (mips) || defined (HAVE_TCATTR)
1501 #ifdef VSUSP
1502 tty.main.c_cc[VSUSP] = CDISABLE; /* Turn off mips handling of C-z. */
1503 #endif /* VSUSP */
1504 #ifdef V_DSUSP
1505 tty.main.c_cc[V_DSUSP] = CDISABLE; /* Turn off mips handling of C-y. */
1506 #endif /* V_DSUSP */
1507 #ifdef VDSUSP /* Some systems have VDSUSP, some have V_DSUSP. */
1508 tty.main.c_cc[VDSUSP] = CDISABLE;
1509 #endif /* VDSUSP */
1510 #ifdef VLNEXT
1511 tty.main.c_cc[VLNEXT] = CDISABLE;
1512 #endif /* VLNEXT */
1513 #ifdef VREPRINT
1514 tty.main.c_cc[VREPRINT] = CDISABLE;
1515 #endif /* VREPRINT */
1516 #ifdef VWERASE
1517 tty.main.c_cc[VWERASE] = CDISABLE;
1518 #endif /* VWERASE */
1519 #ifdef VDISCARD
1520 tty.main.c_cc[VDISCARD] = CDISABLE;
1521 #endif /* VDISCARD */
1522
1523 if (tty_out->flow_control)
1524 {
1525 #ifdef VSTART
1526 tty.main.c_cc[VSTART] = '\021';
1527 #endif /* VSTART */
1528 #ifdef VSTOP
1529 tty.main.c_cc[VSTOP] = '\023';
1530 #endif /* VSTOP */
1531 }
1532 else
1533 {
1534 #ifdef VSTART
1535 tty.main.c_cc[VSTART] = CDISABLE;
1536 #endif /* VSTART */
1537 #ifdef VSTOP
1538 tty.main.c_cc[VSTOP] = CDISABLE;
1539 #endif /* VSTOP */
1540 }
1541 #endif /* mips or HAVE_TCATTR */
1542
1543 #ifdef SET_LINE_DISCIPLINE
1544 /* Need to explicitly request TERMIODISC line discipline or
1545 Ultrix's termios does not work correctly. */
1546 tty.main.c_line = SET_LINE_DISCIPLINE;
1547 #endif
1548 #ifdef AIX
1549 #ifndef IBMR2AIX
1550 /* AIX enhanced edit loses NULs, so disable it. */
1551 tty.main.c_line = 0;
1552 tty.main.c_iflag &= ~ASCEDIT;
1553 #else
1554 tty.main.c_cc[VSTRT] = 255;
1555 tty.main.c_cc[VSTOP] = 255;
1556 tty.main.c_cc[VSUSP] = 255;
1557 tty.main.c_cc[VDSUSP] = 255;
1558 #endif /* IBMR2AIX */
1559 if (tty_out->flow_control)
1560 {
1561 #ifdef VSTART
1562 tty.main.c_cc[VSTART] = '\021';
1563 #endif /* VSTART */
1564 #ifdef VSTOP
1565 tty.main.c_cc[VSTOP] = '\023';
1566 #endif /* VSTOP */
1567 }
1568 /* Also, PTY overloads NUL and BREAK.
1569 don't ignore break, but don't signal either, so it looks like NUL.
1570 This really serves a purpose only if running in an XTERM window
1571 or via TELNET or the like, but does no harm elsewhere. */
1572 tty.main.c_iflag &= ~IGNBRK;
1573 tty.main.c_iflag &= ~BRKINT;
1574 #endif
1575 #else /* if not HAVE_TERMIO */
1576 #ifdef VMS
1577 tty.main.tt_char |= TT$M_NOECHO;
1578 if (meta_key)
1579 tty.main.tt_char |= TT$M_EIGHTBIT;
1580 if (tty_out->flow_control)
1581 tty.main.tt_char |= TT$M_TTSYNC;
1582 else
1583 tty.main.tt_char &= ~TT$M_TTSYNC;
1584 tty.main.tt2_char |= TT2$M_PASTHRU | TT2$M_XON;
1585 #else /* not VMS (BSD, that is) */
1586 #ifndef DOS_NT
1587 XSETINT (Vtty_erase_char, tty.main.sg_erase);
1588 tty.main.sg_flags &= ~(ECHO | CRMOD | XTABS);
1589 if (meta_key)
1590 tty.main.sg_flags |= ANYP;
1591 tty.main.sg_flags |= interrupt_input ? RAW : CBREAK;
1592 #endif /* not DOS_NT */
1593 #endif /* not VMS (BSD, that is) */
1594 #endif /* not HAVE_TERMIO */
1595
1596 /* If going to use CBREAK mode, we must request C-g to interrupt
1597 and turn off start and stop chars, etc. If not going to use
1598 CBREAK mode, do this anyway so as to turn off local flow
1599 control for user coming over network on 4.2; in this case,
1600 only t_stopc and t_startc really matter. */
1601 #ifndef HAVE_TERMIO
1602 #ifdef HAVE_TCHARS
1603 /* Note: if not using CBREAK mode, it makes no difference how we
1604 set this */
1605 tty.tchars = new_tchars;
1606 tty.tchars.t_intrc = quit_char;
1607 if (tty_out->flow_control)
1608 {
1609 tty.tchars.t_startc = '\021';
1610 tty.tchars.t_stopc = '\023';
1611 }
1612
1613 tty.lmode = LDECCTQ | LLITOUT | LPASS8 | LNOFLSH | tty_out->old_tty.lmode;
1614 #ifdef ultrix
1615 /* Under Ultrix 4.2a, leaving this out doesn't seem to hurt
1616 anything, and leaving it in breaks the meta key. Go figure. */
1617 tty.lmode &= ~LLITOUT;
1618 #endif
1619
1620 #ifdef BSD4_1
1621 lmode = tty.lmode;
1622 #endif
1623
1624 #endif /* HAVE_TCHARS */
1625 #endif /* not HAVE_TERMIO */
1626
1627 #ifdef HAVE_LTCHARS
1628 tty.ltchars = new_ltchars;
1629 #endif /* HAVE_LTCHARS */
1630 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida, MW Aug 1993 */
1631 if (!tty_out->term_initted)
1632 internal_terminal_init ();
1633 dos_ttraw ();
1634 #endif
1635
1636 EMACS_SET_TTY (fileno (tty_out->input), &tty, 0);
1637
1638 /* This code added to insure that, if flow-control is not to be used,
1639 we have an unlocked terminal at the start. */
1640
1641 #ifdef TCXONC
1642 if (!tty_out->flow_control) ioctl (fileno (tty_out->input), TCXONC, 1);
1643 #endif
1644 #ifndef APOLLO
1645 #ifdef TIOCSTART
1646 if (!tty_out->flow_control) ioctl (fileno (tty_out->input), TIOCSTART, 0);
1647 #endif
1648 #endif
1649
1650 #if defined (HAVE_TERMIOS) || defined (HPUX9)
1651 #ifdef TCOON
1652 if (!tty_out->flow_control) tcflow (fileno (tty_out->input), TCOON);
1653 #endif
1654 #endif
1655
1656 #ifdef AIXHFT
1657 hft_init (tty_out);
1658 #ifdef IBMR2AIX
1659 {
1660 /* IBM's HFT device usually thinks a ^J should be LF/CR. We need it
1661 to be only LF. This is the way that is done. */
1662 struct termio tty;
1663
1664 if (ioctl (1, HFTGETID, &tty) != -1)
1665 write (1, "\033[20l", 5);
1666 }
1667 #endif
1668 #endif /* AIXHFT */
1669
1670 #ifdef VMS
1671 /* Appears to do nothing when in PASTHRU mode.
1672 SYS$QIOW (0, fileno (tty_out->input), IO$_SETMODE|IO$M_OUTBAND, 0, 0, 0,
1673 interrupt_signal, oob_chars, 0, 0, 0, 0);
1674 */
1675 queue_kbd_input (0);
1676 #endif /* VMS */
1677
1678 #ifdef F_SETFL
1679 #ifndef F_SETOWN_BUG
1680 #ifdef F_GETOWN /* F_SETFL does not imply existence of F_GETOWN */
1681 if (interrupt_input)
1682 {
1683 old_fcntl_owner[fileno (tty_out->input)] =
1684 fcntl (fileno (tty_out->input), F_GETOWN, 0);
1685 fcntl (fileno (tty_out->input), F_SETOWN, getpid ());
1686 init_sigio (fileno (tty_out->input));
1687 }
1688 #endif /* F_GETOWN */
1689 #endif /* F_SETOWN_BUG */
1690 #endif /* F_SETFL */
1691
1692 #ifdef BSD4_1
1693 if (interrupt_input)
1694 init_sigio (fileno (tty_out->input));
1695 #endif
1696
1697 #ifdef VMS /* VMS sometimes has this symbol but lacks setvbuf. */
1698 #undef _IOFBF
1699 #endif
1700 #ifdef _IOFBF
1701 /* This symbol is defined on recent USG systems.
1702 Someone says without this call USG won't really buffer the file
1703 even with a call to setbuf. */
1704 setvbuf (tty_out->output, (char *) _sobuf, _IOFBF, sizeof _sobuf);
1705 #else
1706 setbuf (tty_out->output, (char *) _sobuf);
1707 #endif
1708
1709 tty_set_terminal_modes (tty_out->display);
1710
1711 if (!tty_out->term_initted)
1712 {
1713 Lisp_Object tail, frame;
1714 FOR_EACH_FRAME (tail, frame)
1715 {
1716 /* XXX This needs to be revised. */
1717 if (FRAME_TERMCAP_P (XFRAME (frame))
1718 && FRAME_TTY (XFRAME (frame)) == tty_out)
1719 init_frame_faces (XFRAME (frame));
1720 }
1721 }
1722
1723 if (tty_out->term_initted && no_redraw_on_reenter)
1724 {
1725 if (display_completed)
1726 direct_output_forward_char (0);
1727 }
1728 else
1729 {
1730 Lisp_Object tail, frame;
1731 frame_garbaged = 1;
1732 FOR_EACH_FRAME (tail, frame)
1733 {
1734 if (FRAME_TERMCAP_P (XFRAME (frame))
1735 && FRAME_TTY (XFRAME (frame)) == tty_out)
1736 FRAME_GARBAGED_P (XFRAME (frame)) = 1;
1737 }
1738 }
1739
1740 tty_out->term_initted = 1;
1741 }
1742
1743 /* Return nonzero if safe to use tabs in output.
1744 At the time this is called, init_sys_modes has not been done yet. */
1745
1746 int
1747 tabs_safe_p (int fd)
1748 {
1749 struct emacs_tty etty;
1750
1751 EMACS_GET_TTY (fd, &etty);
1752 return EMACS_TTY_TABS_OK (&etty);
1753 }
1754 \f
1755 /* Get terminal size from system.
1756 Store number of lines into *HEIGHTP and width into *WIDTHP.
1757 We store 0 if there's no valid information. */
1758
1759 void
1760 get_tty_size (int fd, int *widthp, int *heightp)
1761 {
1762
1763 #ifdef TIOCGWINSZ
1764
1765 /* BSD-style. */
1766 struct winsize size;
1767
1768 if (ioctl (fd, TIOCGWINSZ, &size) == -1)
1769 *widthp = *heightp = 0;
1770 else
1771 {
1772 *widthp = size.ws_col;
1773 *heightp = size.ws_row;
1774 }
1775
1776 #else
1777 #ifdef TIOCGSIZE
1778
1779 /* SunOS - style. */
1780 struct ttysize size;
1781
1782 if (ioctl (fd, TIOCGSIZE, &size) == -1)
1783 *widthp = *heightp = 0;
1784 else
1785 {
1786 *widthp = size.ts_cols;
1787 *heightp = size.ts_lines;
1788 }
1789
1790 #else
1791 #ifdef VMS
1792
1793 struct sensemode tty;
1794
1795 SYS$QIOW (0, fd, IO$_SENSEMODE, &tty, 0, 0,
1796 &tty.class, 12, 0, 0, 0, 0);
1797 *widthp = tty.scr_wid;
1798 *heightp = tty.scr_len;
1799
1800 #else
1801 #ifdef MSDOS
1802 *widthp = ScreenCols ();
1803 *heightp = ScreenRows ();
1804 #else /* system doesn't know size */
1805 *widthp = 0;
1806 *heightp = 0;
1807 #endif
1808 #endif /* not VMS */
1809 #endif /* not SunOS-style */
1810 #endif /* not BSD-style */
1811 }
1812
1813 /* Set the logical window size associated with descriptor FD
1814 to HEIGHT and WIDTH. This is used mainly with ptys. */
1815
1816 int
1817 set_window_size (fd, height, width)
1818 int fd, height, width;
1819 {
1820 #ifdef TIOCSWINSZ
1821
1822 /* BSD-style. */
1823 struct winsize size;
1824 size.ws_row = height;
1825 size.ws_col = width;
1826
1827 if (ioctl (fd, TIOCSWINSZ, &size) == -1)
1828 return 0; /* error */
1829 else
1830 return 1;
1831
1832 #else
1833 #ifdef TIOCSSIZE
1834
1835 /* SunOS - style. */
1836 struct ttysize size;
1837 size.ts_lines = height;
1838 size.ts_cols = width;
1839
1840 if (ioctl (fd, TIOCGSIZE, &size) == -1)
1841 return 0;
1842 else
1843 return 1;
1844 #else
1845 return -1;
1846 #endif /* not SunOS-style */
1847 #endif /* not BSD-style */
1848 }
1849
1850 \f
1851
1852 /* Prepare all terminal devices for exiting Emacs. */
1853
1854 void
1855 reset_all_sys_modes (void)
1856 {
1857 struct tty_display_info *tty;
1858 for (tty = tty_list; tty; tty = tty->next)
1859 reset_sys_modes (tty);
1860 }
1861
1862 /* Prepare the terminal for closing it; move the cursor to the
1863 bottom of the frame, turn off interrupt-driven I/O, etc. */
1864
1865 void
1866 reset_sys_modes (tty_out)
1867 struct tty_display_info *tty_out;
1868 {
1869 if (noninteractive)
1870 {
1871 fflush (stdout);
1872 return;
1873 }
1874 if (!tty_out->term_initted)
1875 return;
1876
1877 if (!tty_out->output)
1878 return; /* The tty is suspended. */
1879
1880 /* Go to and clear the last line of the terminal. */
1881
1882 cmgoto (tty_out, FrameRows (tty_out) - 1, 0);
1883
1884 /* Code adapted from tty_clear_end_of_line. */
1885 if (tty_out->TS_clr_line)
1886 {
1887 emacs_tputs (tty_out, tty_out->TS_clr_line, 1, cmputc);
1888 }
1889 else
1890 { /* have to do it the hard way */
1891 int i;
1892 turn_off_insert (tty_out);
1893
1894 for (i = curX (tty_out); i < FrameCols (tty_out) - 1; i++)
1895 {
1896 fputc (' ', tty_out->output);
1897 }
1898 }
1899
1900 cmgoto (tty_out, FrameRows (tty_out) - 1, 0);
1901 fflush (tty_out->output);
1902
1903 #if defined (IBMR2AIX) && defined (AIXHFT)
1904 {
1905 /* HFT devices normally use ^J as a LF/CR. We forced it to
1906 do the LF only. Now, we need to reset it. */
1907 struct termio tty;
1908
1909 if (ioctl (1, HFTGETID, &tty) != -1)
1910 write (1, "\033[20h", 5);
1911 }
1912 #endif
1913
1914 tty_reset_terminal_modes (tty_out->display);
1915 fflush (tty_out->output);
1916 #ifdef BSD_SYSTEM
1917 #ifndef BSD4_1
1918 /* Avoid possible loss of output when changing terminal modes. */
1919 fsync (fileno (tty_out->output));
1920 #endif
1921 #endif
1922
1923 #ifdef F_SETFL
1924 #ifndef F_SETOWN_BUG
1925 #ifdef F_SETOWN /* F_SETFL does not imply existence of F_SETOWN */
1926 if (interrupt_input)
1927 {
1928 reset_sigio (fileno (tty_out->input));
1929 fcntl (fileno (tty_out->input), F_SETOWN,
1930 old_fcntl_owner[fileno (tty_out->input)]);
1931 }
1932 #endif /* F_SETOWN */
1933 #endif /* F_SETOWN_BUG */
1934 #ifdef O_NDELAY
1935 fcntl (fileno (tty_out->input), F_SETFL,
1936 fcntl (fileno (tty_out->input), F_GETFL, 0) & ~O_NDELAY);
1937 #endif
1938 #endif /* F_SETFL */
1939 #ifdef BSD4_1
1940 if (interrupt_input)
1941 reset_sigio (fileno (tty_out->input));
1942 #endif /* BSD4_1 */
1943
1944 if (tty_out->old_tty)
1945 while (EMACS_SET_TTY (fileno (tty_out->input),
1946 tty_out->old_tty, 0) < 0 && errno == EINTR)
1947 ;
1948
1949 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */
1950 dos_ttcooked ();
1951 #endif
1952
1953 #ifdef SET_LINE_DISCIPLINE
1954 /* Ultrix's termios *ignores* any line discipline except TERMIODISC.
1955 A different old line discipline is therefore not restored, yet.
1956 Restore the old line discipline by hand. */
1957 ioctl (0, TIOCSETD, &tty_out->old_tty.main.c_line);
1958 #endif
1959
1960 #ifdef AIXHFT
1961 hft_reset ();
1962 #endif
1963
1964 #ifdef BSD_PGRPS
1965 widen_foreground_group (fileno (tty_out->input));
1966 #endif
1967 }
1968 \f
1969 #ifdef HAVE_PTYS
1970
1971 /* Set up the proper status flags for use of a pty. */
1972
1973 void
1974 setup_pty (fd)
1975 int fd;
1976 {
1977 /* I'm told that TOICREMOTE does not mean control chars
1978 "can't be sent" but rather that they don't have
1979 input-editing or signaling effects.
1980 That should be good, because we have other ways
1981 to do those things in Emacs.
1982 However, telnet mode seems not to work on 4.2.
1983 So TIOCREMOTE is turned off now. */
1984
1985 /* Under hp-ux, if TIOCREMOTE is turned on, some calls
1986 will hang. In particular, the "timeout" feature (which
1987 causes a read to return if there is no data available)
1988 does this. Also it is known that telnet mode will hang
1989 in such a way that Emacs must be stopped (perhaps this
1990 is the same problem).
1991
1992 If TIOCREMOTE is turned off, then there is a bug in
1993 hp-ux which sometimes loses data. Apparently the
1994 code which blocks the master process when the internal
1995 buffer fills up does not work. Other than this,
1996 though, everything else seems to work fine.
1997
1998 Since the latter lossage is more benign, we may as well
1999 lose that way. -- cph */
2000 #ifdef FIONBIO
2001 #if defined(SYSV_PTYS) || defined(UNIX98_PTYS)
2002 {
2003 int on = 1;
2004 ioctl (fd, FIONBIO, &on);
2005 }
2006 #endif
2007 #endif
2008 #ifdef IBMRTAIX
2009 /* On AIX, the parent gets SIGHUP when a pty attached child dies. So, we */
2010 /* ignore SIGHUP once we've started a child on a pty. Note that this may */
2011 /* cause EMACS not to die when it should, i.e., when its own controlling */
2012 /* tty goes away. I've complained to the AIX developers, and they may */
2013 /* change this behavior, but I'm not going to hold my breath. */
2014 signal (SIGHUP, SIG_IGN);
2015 #endif
2016 }
2017 #endif /* HAVE_PTYS */
2018 \f
2019 #ifdef VMS
2020
2021 /* Assigning an input channel is done at the start of Emacs execution.
2022 This is called each time Emacs is resumed, also, but does nothing
2023 because input_chain is no longer zero. */
2024
2025 void
2026 init_vms_input ()
2027 {
2028 int status;
2029
2030 if (fileno (CURTTY ()->input)) == 0)
2031 {
2032 status = SYS$ASSIGN (&input_dsc, &fileno (CURTTY ()->input)), 0, 0);
2033 if (! (status & 1))
2034 LIB$STOP (status);
2035 }
2036 }
2037
2038 /* Deassigning the input channel is done before exiting. */
2039
2040 void
2041 stop_vms_input ()
2042 {
2043 return SYS$DASSGN (fileno (CURTTY ()->input)));
2044 }
2045
2046 short input_buffer;
2047
2048 /* Request reading one character into the keyboard buffer.
2049 This is done as soon as the buffer becomes empty. */
2050
2051 void
2052 queue_kbd_input ()
2053 {
2054 int status;
2055 extern kbd_input_ast ();
2056
2057 waiting_for_ast = 0;
2058 stop_input = 0;
2059 status = SYS$QIO (0, fileno (CURTTY()->input), IO$_READVBLK,
2060 &input_iosb, kbd_input_ast, 1,
2061 &input_buffer, 1, 0, terminator_mask, 0, 0);
2062 }
2063
2064 int input_count;
2065
2066 /* Ast routine that is called when keyboard input comes in
2067 in accord with the SYS$QIO above. */
2068
2069 void
2070 kbd_input_ast ()
2071 {
2072 register int c = -1;
2073 int old_errno = errno;
2074 extern EMACS_TIME *input_available_clear_time;
2075
2076 if (waiting_for_ast)
2077 SYS$SETEF (input_ef);
2078 waiting_for_ast = 0;
2079 input_count++;
2080 #ifdef ASTDEBUG
2081 if (input_count == 25)
2082 exit (1);
2083 printf ("Ast # %d,", input_count);
2084 printf (" iosb = %x, %x, %x, %x",
2085 input_iosb.offset, input_iosb.status, input_iosb.termlen,
2086 input_iosb.term);
2087 #endif
2088 if (input_iosb.offset)
2089 {
2090 c = input_buffer;
2091 #ifdef ASTDEBUG
2092 printf (", char = 0%o", c);
2093 #endif
2094 }
2095 #ifdef ASTDEBUG
2096 printf ("\n");
2097 fflush (stdout);
2098 sleep (1);
2099 #endif
2100 if (! stop_input)
2101 queue_kbd_input ();
2102 if (c >= 0)
2103 {
2104 struct input_event e;
2105 EVENT_INIT (e);
2106
2107 e.kind = ASCII_KEYSTROKE_EVENT;
2108 XSETINT (e.code, c);
2109 e.frame_or_window = selected_frame;
2110 kbd_buffer_store_event (&e);
2111 }
2112 if (input_available_clear_time)
2113 EMACS_SET_SECS_USECS (*input_available_clear_time, 0, 0);
2114 errno = old_errno;
2115 }
2116
2117 /* Wait until there is something in kbd_buffer. */
2118
2119 void
2120 wait_for_kbd_input ()
2121 {
2122 extern int have_process_input, process_exited;
2123
2124 /* If already something, avoid doing system calls. */
2125 if (detect_input_pending ())
2126 {
2127 return;
2128 }
2129 /* Clear a flag, and tell ast routine above to set it. */
2130 SYS$CLREF (input_ef);
2131 waiting_for_ast = 1;
2132 /* Check for timing error: ast happened while we were doing that. */
2133 if (!detect_input_pending ())
2134 {
2135 /* No timing error: wait for flag to be set. */
2136 set_waiting_for_input (0);
2137 SYS$WFLOR (input_ef, input_eflist);
2138 clear_waiting_for_input ();
2139 if (!detect_input_pending ())
2140 /* Check for subprocess input availability */
2141 {
2142 int dsp = have_process_input || process_exited;
2143
2144 SYS$CLREF (process_ef);
2145 if (have_process_input)
2146 process_command_input ();
2147 if (process_exited)
2148 process_exit ();
2149 if (dsp)
2150 {
2151 update_mode_lines++;
2152 prepare_menu_bars ();
2153 redisplay_preserve_echo_area (18);
2154 }
2155 }
2156 }
2157 waiting_for_ast = 0;
2158 }
2159
2160 /* Get rid of any pending QIO, when we are about to suspend
2161 or when we want to throw away pending input.
2162 We wait for a positive sign that the AST routine has run
2163 and therefore there is no I/O request queued when we return.
2164 SYS$SETAST is used to avoid a timing error. */
2165
2166 void
2167 end_kbd_input ()
2168 {
2169 #ifdef ASTDEBUG
2170 printf ("At end_kbd_input.\n");
2171 fflush (stdout);
2172 sleep (1);
2173 #endif
2174 if (LIB$AST_IN_PROG ()) /* Don't wait if suspending from kbd_buffer_store_event! */
2175 {
2176 SYS$CANCEL (fileno (CURTTY()->input));
2177 return;
2178 }
2179
2180 SYS$SETAST (0);
2181 /* Clear a flag, and tell ast routine above to set it. */
2182 SYS$CLREF (input_ef);
2183 waiting_for_ast = 1;
2184 stop_input = 1;
2185 SYS$CANCEL (fileno (CURTTY()->input));
2186 SYS$SETAST (1);
2187 SYS$WAITFR (input_ef);
2188 waiting_for_ast = 0;
2189 }
2190
2191 /* Wait for either input available or time interval expiry. */
2192
2193 void
2194 input_wait_timeout (timeval)
2195 int timeval; /* Time to wait, in seconds */
2196 {
2197 int time [2];
2198 static int zero = 0;
2199 static int large = -10000000;
2200
2201 LIB$EMUL (&timeval, &large, &zero, time); /* Convert to VMS format */
2202
2203 /* If already something, avoid doing system calls. */
2204 if (detect_input_pending ())
2205 {
2206 return;
2207 }
2208 /* Clear a flag, and tell ast routine above to set it. */
2209 SYS$CLREF (input_ef);
2210 waiting_for_ast = 1;
2211 /* Check for timing error: ast happened while we were doing that. */
2212 if (!detect_input_pending ())
2213 {
2214 /* No timing error: wait for flag to be set. */
2215 SYS$CANTIM (1, 0);
2216 if (SYS$SETIMR (timer_ef, time, 0, 1) & 1) /* Set timer */
2217 SYS$WFLOR (timer_ef, timer_eflist); /* Wait for timer expiry or input */
2218 }
2219 waiting_for_ast = 0;
2220 }
2221
2222 /* The standard `sleep' routine works some other way
2223 and it stops working if you have ever quit out of it.
2224 This one continues to work. */
2225
2226 sys_sleep (timeval)
2227 int timeval;
2228 {
2229 int time [2];
2230 static int zero = 0;
2231 static int large = -10000000;
2232
2233 LIB$EMUL (&timeval, &large, &zero, time); /* Convert to VMS format */
2234
2235 SYS$CANTIM (1, 0);
2236 if (SYS$SETIMR (timer_ef, time, 0, 1) & 1) /* Set timer */
2237 SYS$WAITFR (timer_ef); /* Wait for timer expiry only */
2238 }
2239
2240 void
2241 init_sigio (fd)
2242 int fd;
2243 {
2244 request_sigio ();
2245 }
2246
2247 reset_sigio (fd)
2248 int fd;
2249 {
2250 unrequest_sigio ();
2251 }
2252
2253 void
2254 request_sigio ()
2255 {
2256 croak ("request sigio");
2257 }
2258
2259 void
2260 unrequest_sigio ()
2261 {
2262 croak ("unrequest sigio");
2263 }
2264
2265 #endif /* VMS */
2266 \f
2267 /* Note that VMS compiler won't accept defined (CANNOT_DUMP). */
2268 #ifndef CANNOT_DUMP
2269 #define NEED_STARTS
2270 #endif
2271
2272 #ifndef SYSTEM_MALLOC
2273 #ifndef NEED_STARTS
2274 #define NEED_STARTS
2275 #endif
2276 #endif
2277
2278 #ifdef NEED_STARTS
2279 /* Some systems that cannot dump also cannot implement these. */
2280
2281 /*
2282 * Return the address of the start of the text segment prior to
2283 * doing an unexec. After unexec the return value is undefined.
2284 * See crt0.c for further explanation and _start.
2285 *
2286 */
2287
2288 #if !(defined (__NetBSD__) && defined (__ELF__))
2289 #ifndef HAVE_TEXT_START
2290 char *
2291 start_of_text ()
2292 {
2293 #ifdef TEXT_START
2294 return ((char *) TEXT_START);
2295 #else
2296 #ifdef GOULD
2297 extern csrt ();
2298 return ((char *) csrt);
2299 #else /* not GOULD */
2300 extern int _start ();
2301 return ((char *) _start);
2302 #endif /* GOULD */
2303 #endif /* TEXT_START */
2304 }
2305 #endif /* not HAVE_TEXT_START */
2306 #endif
2307
2308 /*
2309 * Return the address of the start of the data segment prior to
2310 * doing an unexec. After unexec the return value is undefined.
2311 * See crt0.c for further information and definition of data_start.
2312 *
2313 * Apparently, on BSD systems this is etext at startup. On
2314 * USG systems (swapping) this is highly mmu dependent and
2315 * is also dependent on whether or not the program is running
2316 * with shared text. Generally there is a (possibly large)
2317 * gap between end of text and start of data with shared text.
2318 *
2319 * On Uniplus+ systems with shared text, data starts at a
2320 * fixed address. Each port (from a given oem) is generally
2321 * different, and the specific value of the start of data can
2322 * be obtained via the UniPlus+ specific "uvar" system call,
2323 * however the method outlined in crt0.c seems to be more portable.
2324 *
2325 * Probably what will have to happen when a USG unexec is available,
2326 * at least on UniPlus, is temacs will have to be made unshared so
2327 * that text and data are contiguous. Then once loadup is complete,
2328 * unexec will produce a shared executable where the data can be
2329 * at the normal shared text boundary and the startofdata variable
2330 * will be patched by unexec to the correct value.
2331 *
2332 */
2333
2334 #ifndef start_of_data
2335 char *
2336 start_of_data ()
2337 {
2338 #ifdef DATA_START
2339 return ((char *) DATA_START);
2340 #else
2341 #ifdef ORDINARY_LINK
2342 /*
2343 * This is a hack. Since we're not linking crt0.c or pre_crt0.c,
2344 * data_start isn't defined. We take the address of environ, which
2345 * is known to live at or near the start of the system crt0.c, and
2346 * we don't sweat the handful of bytes that might lose.
2347 */
2348 extern char **environ;
2349
2350 return ((char *) &environ);
2351 #else
2352 extern int data_start;
2353 return ((char *) &data_start);
2354 #endif /* ORDINARY_LINK */
2355 #endif /* DATA_START */
2356 }
2357 #endif /* start_of_data */
2358 #endif /* NEED_STARTS (not CANNOT_DUMP or not SYSTEM_MALLOC) */
2359 \f
2360 /* init_system_name sets up the string for the Lisp function
2361 system-name to return. */
2362
2363 #ifdef BSD4_1
2364 #include <whoami.h>
2365 #endif
2366
2367 extern Lisp_Object Vsystem_name;
2368
2369 #ifndef BSD4_1
2370 #ifndef VMS
2371 #ifdef HAVE_SOCKETS
2372 #include <sys/socket.h>
2373 #include <netdb.h>
2374 #endif /* HAVE_SOCKETS */
2375 #endif /* not VMS */
2376 #endif /* not BSD4_1 */
2377
2378 #ifdef TRY_AGAIN
2379 #ifndef HAVE_H_ERRNO
2380 extern int h_errno;
2381 #endif
2382 #endif /* TRY_AGAIN */
2383
2384 void
2385 init_system_name ()
2386 {
2387 #ifdef BSD4_1
2388 Vsystem_name = build_string (sysname);
2389 #else
2390 #ifdef VMS
2391 char *sp, *end;
2392 if ((sp = egetenv ("SYS$NODE")) == 0)
2393 Vsystem_name = build_string ("vax-vms");
2394 else if ((end = index (sp, ':')) == 0)
2395 Vsystem_name = build_string (sp);
2396 else
2397 Vsystem_name = make_string (sp, end - sp);
2398 #else
2399 #ifndef HAVE_GETHOSTNAME
2400 struct utsname uts;
2401 uname (&uts);
2402 Vsystem_name = build_string (uts.nodename);
2403 #else /* HAVE_GETHOSTNAME */
2404 unsigned int hostname_size = 256;
2405 char *hostname = (char *) alloca (hostname_size);
2406
2407 /* Try to get the host name; if the buffer is too short, try
2408 again. Apparently, the only indication gethostname gives of
2409 whether the buffer was large enough is the presence or absence
2410 of a '\0' in the string. Eech. */
2411 for (;;)
2412 {
2413 gethostname (hostname, hostname_size - 1);
2414 hostname[hostname_size - 1] = '\0';
2415
2416 /* Was the buffer large enough for the '\0'? */
2417 if (strlen (hostname) < hostname_size - 1)
2418 break;
2419
2420 hostname_size <<= 1;
2421 hostname = (char *) alloca (hostname_size);
2422 }
2423 #ifdef HAVE_SOCKETS
2424 /* Turn the hostname into the official, fully-qualified hostname.
2425 Don't do this if we're going to dump; this can confuse system
2426 libraries on some machines and make the dumped emacs core dump. */
2427 #ifndef CANNOT_DUMP
2428 if (initialized)
2429 #endif /* not CANNOT_DUMP */
2430 if (! index (hostname, '.'))
2431 {
2432 struct hostent *hp;
2433 int count;
2434 for (count = 0;; count++)
2435 {
2436 #ifdef TRY_AGAIN
2437 h_errno = 0;
2438 #endif
2439 hp = gethostbyname (hostname);
2440 #ifdef TRY_AGAIN
2441 if (! (hp == 0 && h_errno == TRY_AGAIN))
2442 #endif
2443 break;
2444 if (count >= 5)
2445 break;
2446 Fsleep_for (make_number (1), Qnil);
2447 }
2448 if (hp)
2449 {
2450 char *fqdn = (char *) hp->h_name;
2451 #if 0
2452 char *p;
2453 #endif
2454
2455 if (!index (fqdn, '.'))
2456 {
2457 /* We still don't have a fully qualified domain name.
2458 Try to find one in the list of alternate names */
2459 char **alias = hp->h_aliases;
2460 while (*alias && !index (*alias, '.'))
2461 alias++;
2462 if (*alias)
2463 fqdn = *alias;
2464 }
2465 hostname = fqdn;
2466 #if 0
2467 /* Convert the host name to lower case. */
2468 /* Using ctype.h here would introduce a possible locale
2469 dependence that is probably wrong for hostnames. */
2470 p = hostname;
2471 while (*p)
2472 {
2473 if (*p >= 'A' && *p <= 'Z')
2474 *p += 'a' - 'A';
2475 p++;
2476 }
2477 #endif
2478 }
2479 }
2480 #endif /* HAVE_SOCKETS */
2481 /* We used to try using getdomainname here,
2482 but NIIBE Yutaka <gniibe@etl.go.jp> says that
2483 getdomainname gets the NIS/YP domain which often is not the same
2484 as in Internet domain name. */
2485 #if 0 /* Turned off because sysinfo is not really likely to return the
2486 correct Internet domain. */
2487 #if (HAVE_SYSINFO && defined (SI_SRPC_DOMAIN))
2488 if (! index (hostname, '.'))
2489 {
2490 /* The hostname is not fully qualified. Append the domain name. */
2491
2492 int hostlen = strlen (hostname);
2493 int domain_size = 256;
2494
2495 for (;;)
2496 {
2497 char *domain = (char *) alloca (domain_size + 1);
2498 char *fqdn = (char *) alloca (hostlen + 1 + domain_size + 1);
2499 int sys_domain_size = sysinfo (SI_SRPC_DOMAIN, domain, domain_size);
2500 if (sys_domain_size <= 0)
2501 break;
2502 if (domain_size < sys_domain_size)
2503 {
2504 domain_size = sys_domain_size;
2505 continue;
2506 }
2507 strcpy (fqdn, hostname);
2508 if (domain[0] == '.')
2509 strcpy (fqdn + hostlen, domain);
2510 else if (domain[0] != 0)
2511 {
2512 fqdn[hostlen] = '.';
2513 strcpy (fqdn + hostlen + 1, domain);
2514 }
2515 hostname = fqdn;
2516 break;
2517 }
2518 }
2519 #endif /* HAVE_SYSINFO && defined (SI_SRPC_DOMAIN) */
2520 #endif /* 0 */
2521 Vsystem_name = build_string (hostname);
2522 #endif /* HAVE_GETHOSTNAME */
2523 #endif /* VMS */
2524 #endif /* BSD4_1 */
2525 {
2526 unsigned char *p;
2527 for (p = SDATA (Vsystem_name); *p; p++)
2528 if (*p == ' ' || *p == '\t')
2529 *p = '-';
2530 }
2531 }
2532 \f
2533 #ifndef MSDOS
2534 #ifndef VMS
2535 #if !defined (HAVE_SELECT) || defined (BROKEN_SELECT_NON_X)
2536
2537 #include "sysselect.h"
2538 #undef select
2539
2540 #if defined (HAVE_X_WINDOWS) && !defined (HAVE_SELECT)
2541 /* Cause explanatory error message at compile time,
2542 since the select emulation is not good enough for X. */
2543 int *x = &x_windows_lose_if_no_select_system_call;
2544 #endif
2545
2546 /* Emulate as much as select as is possible under 4.1 and needed by Gnu Emacs
2547 * Only checks read descriptors.
2548 */
2549 /* How long to wait between checking fds in select */
2550 #define SELECT_PAUSE 1
2551 int select_alarmed;
2552
2553 /* For longjmp'ing back to read_input_waiting. */
2554
2555 jmp_buf read_alarm_throw;
2556
2557 /* Nonzero if the alarm signal should throw back to read_input_waiting.
2558 The read_socket_hook function sets this to 1 while it is waiting. */
2559
2560 int read_alarm_should_throw;
2561
2562 SIGTYPE
2563 select_alarm ()
2564 {
2565 select_alarmed = 1;
2566 #ifdef BSD4_1
2567 sigrelse (SIGALRM);
2568 #else /* not BSD4_1 */
2569 signal (SIGALRM, SIG_IGN);
2570 #endif /* not BSD4_1 */
2571 if (read_alarm_should_throw)
2572 longjmp (read_alarm_throw, 1);
2573 }
2574
2575 #ifndef WINDOWSNT
2576 /* Only rfds are checked. */
2577 int
2578 sys_select (nfds, rfds, wfds, efds, timeout)
2579 int nfds;
2580 SELECT_TYPE *rfds, *wfds, *efds;
2581 EMACS_TIME *timeout;
2582 {
2583 /* XXX This needs to be updated for multi-tty support. Is there
2584 anybody who needs to emulate select these days? */
2585 int ravail = 0;
2586 SELECT_TYPE orfds;
2587 int timeoutval;
2588 int *local_timeout;
2589 extern int proc_buffered_char[];
2590 #ifndef subprocesses
2591 int process_tick = 0, update_tick = 0;
2592 #else
2593 extern int process_tick, update_tick;
2594 #endif
2595 unsigned char buf;
2596
2597 #if defined (HAVE_SELECT) && defined (HAVE_X_WINDOWS)
2598 /* If we're using X, then the native select will work; we only need the
2599 emulation for non-X usage. */
2600 if (!NILP (Vinitial_window_system))
2601 return select (nfds, rfds, wfds, efds, timeout);
2602 #endif
2603 timeoutval = timeout ? EMACS_SECS (*timeout) : 100000;
2604 local_timeout = &timeoutval;
2605 FD_ZERO (&orfds);
2606 if (rfds)
2607 {
2608 orfds = *rfds;
2609 FD_ZERO (rfds);
2610 }
2611 if (wfds)
2612 FD_ZERO (wfds);
2613 if (efds)
2614 FD_ZERO (efds);
2615
2616 /* If we are looking only for the terminal, with no timeout,
2617 just read it and wait -- that's more efficient. */
2618 if (*local_timeout == 100000 && process_tick == update_tick
2619 && FD_ISSET (0, &orfds))
2620 {
2621 int fd;
2622 for (fd = 1; fd < nfds; ++fd)
2623 if (FD_ISSET (fd, &orfds))
2624 goto hardway;
2625 if (! detect_input_pending ())
2626 read_input_waiting ();
2627 FD_SET (0, rfds);
2628 return 1;
2629 }
2630
2631 hardway:
2632 /* Once a second, till the timer expires, check all the flagged read
2633 * descriptors to see if any input is available. If there is some then
2634 * set the corresponding bit in the return copy of rfds.
2635 */
2636 while (1)
2637 {
2638 register int to_check, fd;
2639
2640 if (rfds)
2641 {
2642 for (to_check = nfds, fd = 0; --to_check >= 0; fd++)
2643 {
2644 if (FD_ISSET (fd, &orfds))
2645 {
2646 int avail = 0, status = 0;
2647
2648 if (fd == 0)
2649 avail = detect_input_pending (); /* Special keyboard handler */
2650 else
2651 {
2652 #ifdef FIONREAD
2653 status = ioctl (fd, FIONREAD, &avail);
2654 #else /* no FIONREAD */
2655 /* Hoping it will return -1 if nothing available
2656 or 0 if all 0 chars requested are read. */
2657 if (proc_buffered_char[fd] >= 0)
2658 avail = 1;
2659 else
2660 {
2661 avail = read (fd, &buf, 1);
2662 if (avail > 0)
2663 proc_buffered_char[fd] = buf;
2664 }
2665 #endif /* no FIONREAD */
2666 }
2667 if (status >= 0 && avail > 0)
2668 {
2669 FD_SET (fd, rfds);
2670 ravail++;
2671 }
2672 }
2673 }
2674 }
2675 if (*local_timeout == 0 || ravail != 0 || process_tick != update_tick)
2676 break;
2677
2678 turn_on_atimers (0);
2679 signal (SIGALRM, select_alarm);
2680 select_alarmed = 0;
2681 alarm (SELECT_PAUSE);
2682
2683 /* Wait for a SIGALRM (or maybe a SIGTINT) */
2684 while (select_alarmed == 0 && *local_timeout != 0
2685 && process_tick == update_tick)
2686 {
2687 /* If we are interested in terminal input,
2688 wait by reading the terminal.
2689 That makes instant wakeup for terminal input at least. */
2690 if (FD_ISSET (0, &orfds))
2691 {
2692 read_input_waiting ();
2693 if (detect_input_pending ())
2694 select_alarmed = 1;
2695 }
2696 else
2697 pause ();
2698 }
2699 (*local_timeout) -= SELECT_PAUSE;
2700
2701 /* Reset the old alarm if there was one. */
2702 turn_on_atimers (1);
2703
2704 if (*local_timeout == 0) /* Stop on timer being cleared */
2705 break;
2706 }
2707 return ravail;
2708 }
2709 #endif not WINDOWSNT
2710
2711 /* Read keyboard input into the standard buffer,
2712 waiting for at least one character. */
2713
2714 void
2715 read_input_waiting ()
2716 {
2717 /* XXX This needs to be updated for multi-tty support. Is there
2718 anybody who needs to emulate select these days? */
2719 int nread, i;
2720 extern int quit_char;
2721
2722 if (read_socket_hook)
2723 {
2724 struct input_event hold_quit;
2725
2726 EVENT_INIT (hold_quit);
2727 hold_quit.kind = NO_EVENT;
2728
2729 read_alarm_should_throw = 0;
2730 if (! setjmp (read_alarm_throw))
2731 nread = (*read_socket_hook) (0, 1, &hold_quit);
2732 else
2733 nread = -1;
2734
2735 if (hold_quit.kind != NO_EVENT)
2736 kbd_buffer_store_event (&hold_quit);
2737 }
2738 else
2739 {
2740 struct input_event e;
2741 char buf[3];
2742 nread = read (fileno (stdin), buf, 1);
2743 EVENT_INIT (e);
2744
2745 /* Scan the chars for C-g and store them in kbd_buffer. */
2746 e.kind = ASCII_KEYSTROKE_EVENT;
2747 e.frame_or_window = selected_frame;
2748 e.modifiers = 0;
2749 for (i = 0; i < nread; i++)
2750 {
2751 /* Convert chars > 0177 to meta events if desired.
2752 We do this under the same conditions that read_avail_input does. */
2753 if (read_socket_hook == 0)
2754 {
2755 /* If the user says she has a meta key, then believe her. */
2756 if (meta_key == 1 && (buf[i] & 0x80))
2757 e.modifiers = meta_modifier;
2758 if (meta_key != 2)
2759 buf[i] &= ~0x80;
2760 }
2761
2762 XSETINT (e.code, buf[i]);
2763 kbd_buffer_store_event (&e);
2764 /* Don't look at input that follows a C-g too closely.
2765 This reduces lossage due to autorepeat on C-g. */
2766 if (buf[i] == quit_char)
2767 break;
2768 }
2769 }
2770 }
2771
2772 #if !defined (HAVE_SELECT) || defined (BROKEN_SELECT_NON_X)
2773 #define select sys_select
2774 #endif
2775
2776 #endif /* not HAVE_SELECT */
2777 #endif /* not VMS */
2778 #endif /* not MSDOS */
2779 \f
2780 #ifdef BSD4_1
2781 void
2782 init_sigio (fd)
2783 int fd;
2784 {
2785 if (noninteractive)
2786 return;
2787 lmode = LINTRUP | lmode;
2788 ioctl (fd, TIOCLSET, &lmode);
2789 }
2790
2791 void
2792 reset_sigio (fd)
2793 int fd;
2794 {
2795 if (noninteractive)
2796 return;
2797 lmode = ~LINTRUP & lmode;
2798 ioctl (fd, TIOCLSET, &lmode);
2799 }
2800
2801 void
2802 request_sigio ()
2803 {
2804 sigrelse (SIGTINT);
2805
2806 interrupts_deferred = 0;
2807 }
2808
2809 void
2810 unrequest_sigio ()
2811 {
2812 sighold (SIGTINT);
2813
2814 interrupts_deferred = 1;
2815 }
2816
2817 /* still inside #ifdef BSD4_1 */
2818 #ifdef subprocesses
2819
2820 int sigheld; /* Mask of held signals */
2821
2822 void
2823 sigholdx (signum)
2824 int signum;
2825 {
2826 sigheld |= sigbit (signum);
2827 sighold (signum);
2828 }
2829
2830 void
2831 sigisheld (signum)
2832 int signum;
2833 {
2834 sigheld |= sigbit (signum);
2835 }
2836
2837 void
2838 sigunhold (signum)
2839 int signum;
2840 {
2841 sigheld &= ~sigbit (signum);
2842 sigrelse (signum);
2843 }
2844
2845 void
2846 sigfree () /* Free all held signals */
2847 {
2848 int i;
2849 for (i = 0; i < NSIG; i++)
2850 if (sigheld & sigbit (i))
2851 sigrelse (i);
2852 sigheld = 0;
2853 }
2854
2855 int
2856 sigbit (i)
2857 {
2858 return 1 << (i - 1);
2859 }
2860 #endif /* subprocesses */
2861 #endif /* BSD4_1 */
2862 \f
2863 /* POSIX signals support - DJB */
2864 /* Anyone with POSIX signals should have ANSI C declarations */
2865
2866 #ifdef POSIX_SIGNALS
2867
2868 sigset_t empty_mask, full_mask;
2869
2870 signal_handler_t
2871 sys_signal (int signal_number, signal_handler_t action)
2872 {
2873 struct sigaction new_action, old_action;
2874 sigemptyset (&new_action.sa_mask);
2875 new_action.sa_handler = action;
2876 #if defined (SA_RESTART) && ! defined (BROKEN_SA_RESTART)
2877 /* Emacs mostly works better with restartable system services. If this
2878 flag exists, we probably want to turn it on here.
2879 However, on some systems this resets the timeout of `select'
2880 which means that `select' never finishes if it keeps getting signals.
2881 BROKEN_SA_RESTART is defined on those systems. */
2882 new_action.sa_flags = SA_RESTART;
2883 #else
2884 new_action.sa_flags = 0;
2885 #endif
2886 sigaction (signal_number, &new_action, &old_action);
2887 return (old_action.sa_handler);
2888 }
2889
2890 #ifndef __GNUC__
2891 /* If we're compiling with GCC, we don't need this function, since it
2892 can be written as a macro. */
2893 sigset_t
2894 sys_sigmask (int sig)
2895 {
2896 sigset_t mask;
2897 sigemptyset (&mask);
2898 sigaddset (&mask, sig);
2899 return mask;
2900 }
2901 #endif
2902
2903 /* I'd like to have these guys return pointers to the mask storage in here,
2904 but there'd be trouble if the code was saving multiple masks. I'll be
2905 safe and pass the structure. It normally won't be more than 2 bytes
2906 anyhow. - DJB */
2907
2908 sigset_t
2909 sys_sigblock (sigset_t new_mask)
2910 {
2911 sigset_t old_mask;
2912 sigprocmask (SIG_BLOCK, &new_mask, &old_mask);
2913 return (old_mask);
2914 }
2915
2916 sigset_t
2917 sys_sigunblock (sigset_t new_mask)
2918 {
2919 sigset_t old_mask;
2920 sigprocmask (SIG_UNBLOCK, &new_mask, &old_mask);
2921 return (old_mask);
2922 }
2923
2924 sigset_t
2925 sys_sigsetmask (sigset_t new_mask)
2926 {
2927 sigset_t old_mask;
2928 sigprocmask (SIG_SETMASK, &new_mask, &old_mask);
2929 return (old_mask);
2930 }
2931
2932 #endif /* POSIX_SIGNALS */
2933 \f
2934 #if !defined HAVE_STRSIGNAL && !HAVE_DECL_SYS_SIGLIST
2935 static char *my_sys_siglist[NSIG];
2936 # ifdef sys_siglist
2937 # undef sys_siglist
2938 # endif
2939 # define sys_siglist my_sys_siglist
2940 #endif
2941
2942 void
2943 init_signals ()
2944 {
2945 #ifdef POSIX_SIGNALS
2946 sigemptyset (&empty_mask);
2947 sigfillset (&full_mask);
2948 #endif
2949
2950 #if !defined HAVE_STRSIGNAL && !HAVE_DECL_SYS_SIGLIST
2951 if (! initialized)
2952 {
2953 # ifdef SIGABRT
2954 sys_siglist[SIGABRT] = "Aborted";
2955 # endif
2956 # ifdef SIGAIO
2957 sys_siglist[SIGAIO] = "LAN I/O interrupt";
2958 # endif
2959 # ifdef SIGALRM
2960 sys_siglist[SIGALRM] = "Alarm clock";
2961 # endif
2962 # ifdef SIGBUS
2963 sys_siglist[SIGBUS] = "Bus error";
2964 # endif
2965 # ifdef SIGCLD
2966 sys_siglist[SIGCLD] = "Child status changed";
2967 # endif
2968 # ifdef SIGCHLD
2969 sys_siglist[SIGCHLD] = "Child status changed";
2970 # endif
2971 # ifdef SIGCONT
2972 sys_siglist[SIGCONT] = "Continued";
2973 # endif
2974 # ifdef SIGDANGER
2975 sys_siglist[SIGDANGER] = "Swap space dangerously low";
2976 # endif
2977 # ifdef SIGDGNOTIFY
2978 sys_siglist[SIGDGNOTIFY] = "Notification message in queue";
2979 # endif
2980 # ifdef SIGEMT
2981 sys_siglist[SIGEMT] = "Emulation trap";
2982 # endif
2983 # ifdef SIGFPE
2984 sys_siglist[SIGFPE] = "Arithmetic exception";
2985 # endif
2986 # ifdef SIGFREEZE
2987 sys_siglist[SIGFREEZE] = "SIGFREEZE";
2988 # endif
2989 # ifdef SIGGRANT
2990 sys_siglist[SIGGRANT] = "Monitor mode granted";
2991 # endif
2992 # ifdef SIGHUP
2993 sys_siglist[SIGHUP] = "Hangup";
2994 # endif
2995 # ifdef SIGILL
2996 sys_siglist[SIGILL] = "Illegal instruction";
2997 # endif
2998 # ifdef SIGINT
2999 sys_siglist[SIGINT] = "Interrupt";
3000 # endif
3001 # ifdef SIGIO
3002 sys_siglist[SIGIO] = "I/O possible";
3003 # endif
3004 # ifdef SIGIOINT
3005 sys_siglist[SIGIOINT] = "I/O intervention required";
3006 # endif
3007 # ifdef SIGIOT
3008 sys_siglist[SIGIOT] = "IOT trap";
3009 # endif
3010 # ifdef SIGKILL
3011 sys_siglist[SIGKILL] = "Killed";
3012 # endif
3013 # ifdef SIGLOST
3014 sys_siglist[SIGLOST] = "Resource lost";
3015 # endif
3016 # ifdef SIGLWP
3017 sys_siglist[SIGLWP] = "SIGLWP";
3018 # endif
3019 # ifdef SIGMSG
3020 sys_siglist[SIGMSG] = "Monitor mode data available";
3021 # endif
3022 # ifdef SIGPHONE
3023 sys_siglist[SIGWIND] = "SIGPHONE";
3024 # endif
3025 # ifdef SIGPIPE
3026 sys_siglist[SIGPIPE] = "Broken pipe";
3027 # endif
3028 # ifdef SIGPOLL
3029 sys_siglist[SIGPOLL] = "Pollable event occurred";
3030 # endif
3031 # ifdef SIGPROF
3032 sys_siglist[SIGPROF] = "Profiling timer expired";
3033 # endif
3034 # ifdef SIGPTY
3035 sys_siglist[SIGPTY] = "PTY I/O interrupt";
3036 # endif
3037 # ifdef SIGPWR
3038 sys_siglist[SIGPWR] = "Power-fail restart";
3039 # endif
3040 # ifdef SIGQUIT
3041 sys_siglist[SIGQUIT] = "Quit";
3042 # endif
3043 # ifdef SIGRETRACT
3044 sys_siglist[SIGRETRACT] = "Need to relinguish monitor mode";
3045 # endif
3046 # ifdef SIGSAK
3047 sys_siglist[SIGSAK] = "Secure attention";
3048 # endif
3049 # ifdef SIGSEGV
3050 sys_siglist[SIGSEGV] = "Segmentation violation";
3051 # endif
3052 # ifdef SIGSOUND
3053 sys_siglist[SIGSOUND] = "Sound completed";
3054 # endif
3055 # ifdef SIGSTOP
3056 sys_siglist[SIGSTOP] = "Stopped (signal)";
3057 # endif
3058 # ifdef SIGSTP
3059 sys_siglist[SIGSTP] = "Stopped (user)";
3060 # endif
3061 # ifdef SIGSYS
3062 sys_siglist[SIGSYS] = "Bad argument to system call";
3063 # endif
3064 # ifdef SIGTERM
3065 sys_siglist[SIGTERM] = "Terminated";
3066 # endif
3067 # ifdef SIGTHAW
3068 sys_siglist[SIGTHAW] = "SIGTHAW";
3069 # endif
3070 # ifdef SIGTRAP
3071 sys_siglist[SIGTRAP] = "Trace/breakpoint trap";
3072 # endif
3073 # ifdef SIGTSTP
3074 sys_siglist[SIGTSTP] = "Stopped (user)";
3075 # endif
3076 # ifdef SIGTTIN
3077 sys_siglist[SIGTTIN] = "Stopped (tty input)";
3078 # endif
3079 # ifdef SIGTTOU
3080 sys_siglist[SIGTTOU] = "Stopped (tty output)";
3081 # endif
3082 # ifdef SIGURG
3083 sys_siglist[SIGURG] = "Urgent I/O condition";
3084 # endif
3085 # ifdef SIGUSR1
3086 sys_siglist[SIGUSR1] = "User defined signal 1";
3087 # endif
3088 # ifdef SIGUSR2
3089 sys_siglist[SIGUSR2] = "User defined signal 2";
3090 # endif
3091 # ifdef SIGVTALRM
3092 sys_siglist[SIGVTALRM] = "Virtual timer expired";
3093 # endif
3094 # ifdef SIGWAITING
3095 sys_siglist[SIGWAITING] = "Process's LWPs are blocked";
3096 # endif
3097 # ifdef SIGWINCH
3098 sys_siglist[SIGWINCH] = "Window size changed";
3099 # endif
3100 # ifdef SIGWIND
3101 sys_siglist[SIGWIND] = "SIGWIND";
3102 # endif
3103 # ifdef SIGXCPU
3104 sys_siglist[SIGXCPU] = "CPU time limit exceeded";
3105 # endif
3106 # ifdef SIGXFSZ
3107 sys_siglist[SIGXFSZ] = "File size limit exceeded";
3108 # endif
3109 }
3110 #endif /* !defined HAVE_STRSIGNAL && !defined HAVE_DECL_SYS_SIGLIST */
3111 }
3112 \f
3113 #ifndef HAVE_RANDOM
3114 #ifdef random
3115 #define HAVE_RANDOM
3116 #endif
3117 #endif
3118
3119 /* Figure out how many bits the system's random number generator uses.
3120 `random' and `lrand48' are assumed to return 31 usable bits.
3121 BSD `rand' returns a 31 bit value but the low order bits are unusable;
3122 so we'll shift it and treat it like the 15-bit USG `rand'. */
3123
3124 #ifndef RAND_BITS
3125 # ifdef HAVE_RANDOM
3126 # define RAND_BITS 31
3127 # else /* !HAVE_RANDOM */
3128 # ifdef HAVE_LRAND48
3129 # define RAND_BITS 31
3130 # define random lrand48
3131 # else /* !HAVE_LRAND48 */
3132 # define RAND_BITS 15
3133 # if RAND_MAX == 32767
3134 # define random rand
3135 # else /* RAND_MAX != 32767 */
3136 # if RAND_MAX == 2147483647
3137 # define random() (rand () >> 16)
3138 # else /* RAND_MAX != 2147483647 */
3139 # ifdef USG
3140 # define random rand
3141 # else
3142 # define random() (rand () >> 16)
3143 # endif /* !USG */
3144 # endif /* RAND_MAX != 2147483647 */
3145 # endif /* RAND_MAX != 32767 */
3146 # endif /* !HAVE_LRAND48 */
3147 # endif /* !HAVE_RANDOM */
3148 #endif /* !RAND_BITS */
3149
3150 void
3151 seed_random (arg)
3152 long arg;
3153 {
3154 #ifdef HAVE_RANDOM
3155 srandom ((unsigned int)arg);
3156 #else
3157 # ifdef HAVE_LRAND48
3158 srand48 (arg);
3159 # else
3160 srand ((unsigned int)arg);
3161 # endif
3162 #endif
3163 }
3164
3165 /*
3166 * Build a full Emacs-sized word out of whatever we've got.
3167 * This suffices even for a 64-bit architecture with a 15-bit rand.
3168 */
3169 long
3170 get_random ()
3171 {
3172 long val = random ();
3173 #if VALBITS > RAND_BITS
3174 val = (val << RAND_BITS) ^ random ();
3175 #if VALBITS > 2*RAND_BITS
3176 val = (val << RAND_BITS) ^ random ();
3177 #if VALBITS > 3*RAND_BITS
3178 val = (val << RAND_BITS) ^ random ();
3179 #if VALBITS > 4*RAND_BITS
3180 val = (val << RAND_BITS) ^ random ();
3181 #endif /* need at least 5 */
3182 #endif /* need at least 4 */
3183 #endif /* need at least 3 */
3184 #endif /* need at least 2 */
3185 return val & ((1L << VALBITS) - 1);
3186 }
3187 \f
3188 #ifdef WRONG_NAME_INSQUE
3189
3190 insque (q,p)
3191 caddr_t q,p;
3192 {
3193 _insque (q,p);
3194 }
3195
3196 #endif
3197 \f
3198 #ifdef VMS
3199
3200 #ifdef getenv
3201 /* If any place else asks for the TERM variable,
3202 allow it to be overridden with the EMACS_TERM variable
3203 before attempting to translate the logical name TERM. As a last
3204 resort, ask for VAX C's special idea of the TERM variable. */
3205 #undef getenv
3206 char *
3207 sys_getenv (name)
3208 char *name;
3209 {
3210 register char *val;
3211 static char buf[256];
3212 static struct dsc$descriptor_s equiv
3213 = {sizeof (buf), DSC$K_DTYPE_T, DSC$K_CLASS_S, buf};
3214 static struct dsc$descriptor_s d_name
3215 = {0, DSC$K_DTYPE_T, DSC$K_CLASS_S, 0};
3216 short eqlen;
3217
3218 if (!strcmp (name, "TERM"))
3219 {
3220 val = (char *) getenv ("EMACS_TERM");
3221 if (val)
3222 return val;
3223 }
3224
3225 d_name.dsc$w_length = strlen (name);
3226 d_name.dsc$a_pointer = name;
3227 if (LIB$SYS_TRNLOG (&d_name, &eqlen, &equiv) == 1)
3228 {
3229 char *str = (char *) xmalloc (eqlen + 1);
3230 bcopy (buf, str, eqlen);
3231 str[eqlen] = '\0';
3232 /* This is a storage leak, but a pain to fix. With luck,
3233 no one will ever notice. */
3234 return str;
3235 }
3236 return (char *) getenv (name);
3237 }
3238 #endif /* getenv */
3239
3240 #ifdef abort
3241 /* Since VMS doesn't believe in core dumps, the only way to debug this beast is
3242 to force a call on the debugger from within the image. */
3243 #undef abort
3244 sys_abort ()
3245 {
3246 reset_all_sys_modes ();
3247 LIB$SIGNAL (SS$_DEBUG);
3248 }
3249 #endif /* abort */
3250 #endif /* VMS */
3251 \f
3252 #ifdef VMS
3253 #ifdef LINK_CRTL_SHARE
3254 #ifdef SHARABLE_LIB_BUG
3255 /* Variables declared noshare and initialized in sharable libraries
3256 cannot be shared. The VMS linker incorrectly forces you to use a private
3257 version which is uninitialized... If not for this "feature", we
3258 could use the C library definition of sys_nerr and sys_errlist. */
3259 int sys_nerr = 35;
3260 char *sys_errlist[] =
3261 {
3262 "error 0",
3263 "not owner",
3264 "no such file or directory",
3265 "no such process",
3266 "interrupted system call",
3267 "i/o error",
3268 "no such device or address",
3269 "argument list too long",
3270 "exec format error",
3271 "bad file number",
3272 "no child process",
3273 "no more processes",
3274 "not enough memory",
3275 "permission denied",
3276 "bad address",
3277 "block device required",
3278 "mount devices busy",
3279 "file exists",
3280 "cross-device link",
3281 "no such device",
3282 "not a directory",
3283 "is a directory",
3284 "invalid argument",
3285 "file table overflow",
3286 "too many open files",
3287 "not a typewriter",
3288 "text file busy",
3289 "file too big",
3290 "no space left on device",
3291 "illegal seek",
3292 "read-only file system",
3293 "too many links",
3294 "broken pipe",
3295 "math argument",
3296 "result too large",
3297 "I/O stream empty",
3298 "vax/vms specific error code nontranslatable error"
3299 };
3300 #endif /* SHARABLE_LIB_BUG */
3301 #endif /* LINK_CRTL_SHARE */
3302 #endif /* VMS */
3303
3304 #ifndef HAVE_STRERROR
3305 #ifndef WINDOWSNT
3306 char *
3307 strerror (errnum)
3308 int errnum;
3309 {
3310 extern char *sys_errlist[];
3311 extern int sys_nerr;
3312
3313 if (errnum >= 0 && errnum < sys_nerr)
3314 return sys_errlist[errnum];
3315 return (char *) "Unknown error";
3316 }
3317 #endif /* not WINDOWSNT */
3318 #endif /* ! HAVE_STRERROR */
3319 \f
3320 int
3321 emacs_open (path, oflag, mode)
3322 const char *path;
3323 int oflag, mode;
3324 {
3325 register int rtnval;
3326
3327 #ifdef BSD4_1
3328 if (oflag & O_CREAT)
3329 return creat (path, mode);
3330 #endif
3331
3332 while ((rtnval = open (path, oflag, mode)) == -1
3333 && (errno == EINTR));
3334 return (rtnval);
3335 }
3336
3337 int
3338 emacs_close (fd)
3339 int fd;
3340 {
3341 int did_retry = 0;
3342 register int rtnval;
3343
3344 while ((rtnval = close (fd)) == -1
3345 && (errno == EINTR))
3346 did_retry = 1;
3347
3348 /* If close is interrupted SunOS 4.1 may or may not have closed the
3349 file descriptor. If it did the second close will fail with
3350 errno = EBADF. That means we have succeeded. */
3351 if (rtnval == -1 && did_retry && errno == EBADF)
3352 return 0;
3353
3354 return rtnval;
3355 }
3356
3357 int
3358 emacs_read (fildes, buf, nbyte)
3359 int fildes;
3360 char *buf;
3361 unsigned int nbyte;
3362 {
3363 register int rtnval;
3364
3365 while ((rtnval = read (fildes, buf, nbyte)) == -1
3366 && (errno == EINTR));
3367 return (rtnval);
3368 }
3369
3370 int
3371 emacs_write (fildes, buf, nbyte)
3372 int fildes;
3373 const char *buf;
3374 unsigned int nbyte;
3375 {
3376 register int rtnval, bytes_written;
3377
3378 bytes_written = 0;
3379
3380 while (nbyte > 0)
3381 {
3382 rtnval = write (fildes, buf, nbyte);
3383
3384 if (rtnval == -1)
3385 {
3386 if (errno == EINTR)
3387 continue;
3388 else
3389 return (bytes_written ? bytes_written : -1);
3390 }
3391
3392 buf += rtnval;
3393 nbyte -= rtnval;
3394 bytes_written += rtnval;
3395 }
3396 return (bytes_written);
3397 }
3398 \f
3399 #ifdef USG
3400 /*
3401 * All of the following are for USG.
3402 *
3403 * On USG systems the system calls are INTERRUPTIBLE by signals
3404 * that the user program has elected to catch. Thus the system call
3405 * must be retried in these cases. To handle this without massive
3406 * changes in the source code, we remap the standard system call names
3407 * to names for our own functions in sysdep.c that do the system call
3408 * with retries. Actually, for portability reasons, it is good
3409 * programming practice, as this example shows, to limit all actual
3410 * system calls to a single occurrence in the source. Sure, this
3411 * adds an extra level of function call overhead but it is almost
3412 * always negligible. Fred Fish, Unisoft Systems Inc.
3413 */
3414
3415 /*
3416 * Warning, this function may not duplicate 4.2 action properly
3417 * under error conditions.
3418 */
3419
3420 #ifndef MAXPATHLEN
3421 /* In 4.1, param.h fails to define this. */
3422 #define MAXPATHLEN 1024
3423 #endif
3424
3425 #ifndef HAVE_GETWD
3426
3427 char *
3428 getwd (pathname)
3429 char *pathname;
3430 {
3431 char *npath, *spath;
3432 extern char *getcwd ();
3433
3434 BLOCK_INPUT; /* getcwd uses malloc */
3435 spath = npath = getcwd ((char *) 0, MAXPATHLEN);
3436 if (spath == 0)
3437 {
3438 UNBLOCK_INPUT;
3439 return spath;
3440 }
3441 /* On Altos 3068, getcwd can return @hostname/dir, so discard
3442 up to first slash. Should be harmless on other systems. */
3443 while (*npath && *npath != '/')
3444 npath++;
3445 strcpy (pathname, npath);
3446 free (spath); /* getcwd uses malloc */
3447 UNBLOCK_INPUT;
3448 return pathname;
3449 }
3450
3451 #endif /* HAVE_GETWD */
3452
3453 /*
3454 * Emulate rename using unlink/link. Note that this is
3455 * only partially correct. Also, doesn't enforce restriction
3456 * that files be of same type (regular->regular, dir->dir, etc).
3457 */
3458
3459 #ifndef HAVE_RENAME
3460
3461 rename (from, to)
3462 const char *from;
3463 const char *to;
3464 {
3465 if (access (from, 0) == 0)
3466 {
3467 unlink (to);
3468 if (link (from, to) == 0)
3469 if (unlink (from) == 0)
3470 return (0);
3471 }
3472 return (-1);
3473 }
3474
3475 #endif
3476
3477
3478 #ifdef HPUX
3479 #ifndef HAVE_PERROR
3480
3481 /* HPUX curses library references perror, but as far as we know
3482 it won't be called. Anyway this definition will do for now. */
3483
3484 perror ()
3485 {
3486 }
3487
3488 #endif /* not HAVE_PERROR */
3489 #endif /* HPUX */
3490
3491 #ifndef HAVE_DUP2
3492
3493 /*
3494 * Emulate BSD dup2. First close newd if it already exists.
3495 * Then, attempt to dup oldd. If not successful, call dup2 recursively
3496 * until we are, then close the unsuccessful ones.
3497 */
3498
3499 dup2 (oldd, newd)
3500 int oldd;
3501 int newd;
3502 {
3503 register int fd, ret;
3504
3505 emacs_close (newd);
3506
3507 #ifdef F_DUPFD
3508 return fcntl (oldd, F_DUPFD, newd);
3509 #else
3510 fd = dup (old);
3511 if (fd == -1)
3512 return -1;
3513 if (fd == new)
3514 return new;
3515 ret = dup2 (old,new);
3516 emacs_close (fd);
3517 return ret;
3518 #endif
3519 }
3520
3521 #endif /* not HAVE_DUP2 */
3522
3523 /*
3524 * Gettimeofday. Simulate as much as possible. Only accurate
3525 * to nearest second. Emacs doesn't use tzp so ignore it for now.
3526 * Only needed when subprocesses are defined.
3527 */
3528
3529 #ifdef subprocesses
3530 #ifndef VMS
3531 #ifndef HAVE_GETTIMEOFDAY
3532 #ifdef HAVE_TIMEVAL
3533
3534 /* ARGSUSED */
3535 int
3536 gettimeofday (tp, tzp)
3537 struct timeval *tp;
3538 struct timezone *tzp;
3539 {
3540 extern long time ();
3541
3542 tp->tv_sec = time ((long *)0);
3543 tp->tv_usec = 0;
3544 if (tzp != 0)
3545 tzp->tz_minuteswest = -1;
3546 return 0;
3547 }
3548
3549 #endif
3550 #endif
3551 #endif
3552 #endif /* subprocess && !HAVE_GETTIMEOFDAY && HAVE_TIMEVAL && !VMS */
3553
3554 /*
3555 * This function will go away as soon as all the stubs fixed. (fnf)
3556 */
3557
3558 void
3559 croak (badfunc)
3560 char *badfunc;
3561 {
3562 printf ("%s not yet implemented\r\n", badfunc);
3563 reset_all_sys_modes ();
3564 exit (1);
3565 }
3566
3567 #endif /* USG */
3568 \f
3569 /* Directory routines for systems that don't have them. */
3570
3571 #ifdef SYSV_SYSTEM_DIR
3572
3573 #include <dirent.h>
3574
3575 #if defined (BROKEN_CLOSEDIR) || !defined (HAVE_CLOSEDIR)
3576
3577 int
3578 closedir (dirp)
3579 register DIR *dirp; /* stream from opendir */
3580 {
3581 int rtnval;
3582
3583 rtnval = emacs_close (dirp->dd_fd);
3584
3585 /* Some systems (like Solaris) allocate the buffer and the DIR all
3586 in one block. Why in the world are we freeing this ourselves
3587 anyway? */
3588 #if ! (defined (sun) && defined (USG5_4))
3589 xfree ((char *) dirp->dd_buf); /* directory block defined in <dirent.h> */
3590 #endif
3591 xfree ((char *) dirp);
3592
3593 return rtnval;
3594 }
3595 #endif /* BROKEN_CLOSEDIR or not HAVE_CLOSEDIR */
3596 #endif /* SYSV_SYSTEM_DIR */
3597
3598 #ifdef NONSYSTEM_DIR_LIBRARY
3599
3600 DIR *
3601 opendir (filename)
3602 char *filename; /* name of directory */
3603 {
3604 register DIR *dirp; /* -> malloc'ed storage */
3605 register int fd; /* file descriptor for read */
3606 struct stat sbuf; /* result of fstat */
3607
3608 fd = emacs_open (filename, O_RDONLY, 0);
3609 if (fd < 0)
3610 return 0;
3611
3612 BLOCK_INPUT;
3613 if (fstat (fd, &sbuf) < 0
3614 || (sbuf.st_mode & S_IFMT) != S_IFDIR
3615 || (dirp = (DIR *) xmalloc (sizeof (DIR))) == 0)
3616 {
3617 emacs_close (fd);
3618 UNBLOCK_INPUT;
3619 return 0; /* bad luck today */
3620 }
3621 UNBLOCK_INPUT;
3622
3623 dirp->dd_fd = fd;
3624 dirp->dd_loc = dirp->dd_size = 0; /* refill needed */
3625
3626 return dirp;
3627 }
3628
3629 void
3630 closedir (dirp)
3631 register DIR *dirp; /* stream from opendir */
3632 {
3633 emacs_close (dirp->dd_fd);
3634 xfree ((char *) dirp);
3635 }
3636
3637
3638 #ifndef VMS
3639 #define DIRSIZ 14
3640 struct olddir
3641 {
3642 ino_t od_ino; /* inode */
3643 char od_name[DIRSIZ]; /* filename */
3644 };
3645 #endif /* not VMS */
3646
3647 struct direct dir_static; /* simulated directory contents */
3648
3649 /* ARGUSED */
3650 struct direct *
3651 readdir (dirp)
3652 register DIR *dirp; /* stream from opendir */
3653 {
3654 #ifndef VMS
3655 register struct olddir *dp; /* -> directory data */
3656 #else /* VMS */
3657 register struct dir$_name *dp; /* -> directory data */
3658 register struct dir$_version *dv; /* -> version data */
3659 #endif /* VMS */
3660
3661 for (; ;)
3662 {
3663 if (dirp->dd_loc >= dirp->dd_size)
3664 dirp->dd_loc = dirp->dd_size = 0;
3665
3666 if (dirp->dd_size == 0 /* refill buffer */
3667 && (dirp->dd_size = emacs_read (dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ)) <= 0)
3668 return 0;
3669
3670 #ifndef VMS
3671 dp = (struct olddir *) &dirp->dd_buf[dirp->dd_loc];
3672 dirp->dd_loc += sizeof (struct olddir);
3673
3674 if (dp->od_ino != 0) /* not deleted entry */
3675 {
3676 dir_static.d_ino = dp->od_ino;
3677 strncpy (dir_static.d_name, dp->od_name, DIRSIZ);
3678 dir_static.d_name[DIRSIZ] = '\0';
3679 dir_static.d_namlen = strlen (dir_static.d_name);
3680 dir_static.d_reclen = sizeof (struct direct)
3681 - MAXNAMLEN + 3
3682 + dir_static.d_namlen - dir_static.d_namlen % 4;
3683 return &dir_static; /* -> simulated structure */
3684 }
3685 #else /* VMS */
3686 dp = (struct dir$_name *) dirp->dd_buf;
3687 if (dirp->dd_loc == 0)
3688 dirp->dd_loc = (dp->dir$b_namecount&1) ? dp->dir$b_namecount + 1
3689 : dp->dir$b_namecount;
3690 dv = (struct dir$_version *)&dp->dir$t_name[dirp->dd_loc];
3691 dir_static.d_ino = dv->dir$w_fid_num;
3692 dir_static.d_namlen = dp->dir$b_namecount;
3693 dir_static.d_reclen = sizeof (struct direct)
3694 - MAXNAMLEN + 3
3695 + dir_static.d_namlen - dir_static.d_namlen % 4;
3696 strncpy (dir_static.d_name, dp->dir$t_name, dp->dir$b_namecount);
3697 dir_static.d_name[dir_static.d_namlen] = '\0';
3698 dirp->dd_loc = dirp->dd_size; /* only one record at a time */
3699 return &dir_static;
3700 #endif /* VMS */
3701 }
3702 }
3703
3704 #ifdef VMS
3705 /* readdirver is just like readdir except it returns all versions of a file
3706 as separate entries. */
3707
3708 /* ARGUSED */
3709 struct direct *
3710 readdirver (dirp)
3711 register DIR *dirp; /* stream from opendir */
3712 {
3713 register struct dir$_name *dp; /* -> directory data */
3714 register struct dir$_version *dv; /* -> version data */
3715
3716 if (dirp->dd_loc >= dirp->dd_size - sizeof (struct dir$_name))
3717 dirp->dd_loc = dirp->dd_size = 0;
3718
3719 if (dirp->dd_size == 0 /* refill buffer */
3720 && (dirp->dd_size = sys_read (dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ)) <= 0)
3721 return 0;
3722
3723 dp = (struct dir$_name *) dirp->dd_buf;
3724 if (dirp->dd_loc == 0)
3725 dirp->dd_loc = (dp->dir$b_namecount & 1) ? dp->dir$b_namecount + 1
3726 : dp->dir$b_namecount;
3727 dv = (struct dir$_version *) &dp->dir$t_name[dirp->dd_loc];
3728 strncpy (dir_static.d_name, dp->dir$t_name, dp->dir$b_namecount);
3729 sprintf (&dir_static.d_name[dp->dir$b_namecount], ";%d", dv->dir$w_version);
3730 dir_static.d_namlen = strlen (dir_static.d_name);
3731 dir_static.d_ino = dv->dir$w_fid_num;
3732 dir_static.d_reclen = sizeof (struct direct) - MAXNAMLEN + 3
3733 + dir_static.d_namlen - dir_static.d_namlen % 4;
3734 dirp->dd_loc = ((char *) (++dv) - dp->dir$t_name);
3735 return &dir_static;
3736 }
3737
3738 #endif /* VMS */
3739
3740 #endif /* NONSYSTEM_DIR_LIBRARY */
3741
3742 \f
3743 int
3744 set_file_times (filename, atime, mtime)
3745 const char *filename;
3746 EMACS_TIME atime, mtime;
3747 {
3748 #ifdef HAVE_UTIMES
3749 struct timeval tv[2];
3750 tv[0] = atime;
3751 tv[1] = mtime;
3752 return utimes (filename, tv);
3753 #else /* not HAVE_UTIMES */
3754 struct utimbuf utb;
3755 utb.actime = EMACS_SECS (atime);
3756 utb.modtime = EMACS_SECS (mtime);
3757 return utime (filename, &utb);
3758 #endif /* not HAVE_UTIMES */
3759 }
3760 \f
3761 /* mkdir and rmdir functions, for systems which don't have them. */
3762
3763 #ifndef HAVE_MKDIR
3764 /*
3765 * Written by Robert Rother, Mariah Corporation, August 1985.
3766 *
3767 * If you want it, it's yours. All I ask in return is that if you
3768 * figure out how to do this in a Bourne Shell script you send me
3769 * a copy.
3770 * sdcsvax!rmr or rmr@uscd
3771 *
3772 * Severely hacked over by John Gilmore to make a 4.2BSD compatible
3773 * subroutine. 11Mar86; hoptoad!gnu
3774 *
3775 * Modified by rmtodd@uokmax 6-28-87 -- when making an already existing dir,
3776 * subroutine didn't return EEXIST. It does now.
3777 */
3778
3779 /*
3780 * Make a directory.
3781 */
3782 #ifdef MKDIR_PROTOTYPE
3783 MKDIR_PROTOTYPE
3784 #else
3785 int
3786 mkdir (dpath, dmode)
3787 char *dpath;
3788 int dmode;
3789 #endif
3790 {
3791 int cpid, status, fd;
3792 struct stat statbuf;
3793
3794 if (stat (dpath, &statbuf) == 0)
3795 {
3796 errno = EEXIST; /* Stat worked, so it already exists */
3797 return -1;
3798 }
3799
3800 /* If stat fails for a reason other than non-existence, return error */
3801 if (errno != ENOENT)
3802 return -1;
3803
3804 synch_process_alive = 1;
3805 switch (cpid = fork ())
3806 {
3807
3808 case -1: /* Error in fork */
3809 return (-1); /* Errno is set already */
3810
3811 case 0: /* Child process */
3812 /*
3813 * Cheap hack to set mode of new directory. Since this
3814 * child process is going away anyway, we zap its umask.
3815 * FIXME, this won't suffice to set SUID, SGID, etc. on this
3816 * directory. Does anybody care?
3817 */
3818 status = umask (0); /* Get current umask */
3819 status = umask (status | (0777 & ~dmode)); /* Set for mkdir */
3820 fd = emacs_open ("/dev/null", O_RDWR, 0);
3821 if (fd >= 0)
3822 {
3823 dup2 (fd, 0);
3824 dup2 (fd, 1);
3825 dup2 (fd, 2);
3826 }
3827 execl ("/bin/mkdir", "mkdir", dpath, (char *) 0);
3828 _exit (-1); /* Can't exec /bin/mkdir */
3829
3830 default: /* Parent process */
3831 wait_for_termination (cpid);
3832 }
3833
3834 if (synch_process_death != 0 || synch_process_retcode != 0
3835 || synch_process_termsig != 0)
3836 {
3837 errno = EIO; /* We don't know why, but */
3838 return -1; /* /bin/mkdir failed */
3839 }
3840
3841 return 0;
3842 }
3843 #endif /* not HAVE_MKDIR */
3844
3845 #ifndef HAVE_RMDIR
3846 int
3847 rmdir (dpath)
3848 char *dpath;
3849 {
3850 int cpid, status, fd;
3851 struct stat statbuf;
3852
3853 if (stat (dpath, &statbuf) != 0)
3854 {
3855 /* Stat just set errno. We don't have to */
3856 return -1;
3857 }
3858
3859 synch_process_alive = 1;
3860 switch (cpid = fork ())
3861 {
3862
3863 case -1: /* Error in fork */
3864 return (-1); /* Errno is set already */
3865
3866 case 0: /* Child process */
3867 fd = emacs_open ("/dev/null", O_RDWR, 0);
3868 if (fd >= 0)
3869 {
3870 dup2 (fd, 0);
3871 dup2 (fd, 1);
3872 dup2 (fd, 2);
3873 }
3874 execl ("/bin/rmdir", "rmdir", dpath, (char *) 0);
3875 _exit (-1); /* Can't exec /bin/rmdir */
3876
3877 default: /* Parent process */
3878 wait_for_termination (cpid);
3879 }
3880
3881 if (synch_process_death != 0 || synch_process_retcode != 0
3882 || synch_process_termsig != 0)
3883 {
3884 errno = EIO; /* We don't know why, but */
3885 return -1; /* /bin/rmdir failed */
3886 }
3887
3888 return 0;
3889 }
3890 #endif /* !HAVE_RMDIR */
3891
3892
3893 \f
3894 /* Functions for VMS */
3895 #ifdef VMS
3896 #include "vms-pwd.h"
3897 #include <acldef.h>
3898 #include <chpdef.h>
3899 #include <jpidef.h>
3900
3901 /* Return as a string the VMS error string pertaining to STATUS.
3902 Reuses the same static buffer each time it is called. */
3903
3904 char *
3905 vmserrstr (status)
3906 int status; /* VMS status code */
3907 {
3908 int bufadr[2];
3909 short len;
3910 static char buf[257];
3911
3912 bufadr[0] = sizeof buf - 1;
3913 bufadr[1] = (int) buf;
3914 if (! (SYS$GETMSG (status, &len, bufadr, 0x1, 0) & 1))
3915 return "untranslatable VMS error status";
3916 buf[len] = '\0';
3917 return buf;
3918 }
3919
3920 #ifdef access
3921 #undef access
3922
3923 /* The following is necessary because 'access' emulation by VMS C (2.0) does
3924 * not work correctly. (It also doesn't work well in version 2.3.)
3925 */
3926
3927 #ifdef VMS4_4
3928
3929 #define DESCRIPTOR(name,string) struct dsc$descriptor_s name = \
3930 { strlen (string), DSC$K_DTYPE_T, DSC$K_CLASS_S, string }
3931
3932 typedef union {
3933 struct {
3934 unsigned short s_buflen;
3935 unsigned short s_code;
3936 char *s_bufadr;
3937 unsigned short *s_retlenadr;
3938 } s;
3939 int end;
3940 } item;
3941 #define buflen s.s_buflen
3942 #define code s.s_code
3943 #define bufadr s.s_bufadr
3944 #define retlenadr s.s_retlenadr
3945
3946 #define R_OK 4 /* test for read permission */
3947 #define W_OK 2 /* test for write permission */
3948 #define X_OK 1 /* test for execute (search) permission */
3949 #define F_OK 0 /* test for presence of file */
3950
3951 int
3952 sys_access (path, mode)
3953 char *path;
3954 int mode;
3955 {
3956 static char *user = NULL;
3957 char dir_fn[512];
3958
3959 /* translate possible directory spec into .DIR file name, so brain-dead
3960 * access can treat the directory like a file. */
3961 if (directory_file_name (path, dir_fn))
3962 path = dir_fn;
3963
3964 if (mode == F_OK)
3965 return access (path, mode);
3966 if (user == NULL && (user = (char *) getenv ("USER")) == NULL)
3967 return -1;
3968 {
3969 int stat;
3970 int flags;
3971 int acces;
3972 unsigned short int dummy;
3973 item itemlst[3];
3974 static int constant = ACL$C_FILE;
3975 DESCRIPTOR (path_desc, path);
3976 DESCRIPTOR (user_desc, user);
3977
3978 flags = 0;
3979 acces = 0;
3980 if ((mode & X_OK) && ((stat = access (path, mode)) < 0 || mode == X_OK))
3981 return stat;
3982 if (mode & R_OK)
3983 acces |= CHP$M_READ;
3984 if (mode & W_OK)
3985 acces |= CHP$M_WRITE;
3986 itemlst[0].buflen = sizeof (int);
3987 itemlst[0].code = CHP$_FLAGS;
3988 itemlst[0].bufadr = (char *) &flags;
3989 itemlst[0].retlenadr = &dummy;
3990 itemlst[1].buflen = sizeof (int);
3991 itemlst[1].code = CHP$_ACCESS;
3992 itemlst[1].bufadr = (char *) &acces;
3993 itemlst[1].retlenadr = &dummy;
3994 itemlst[2].end = CHP$_END;
3995 stat = SYS$CHECK_ACCESS (&constant, &path_desc, &user_desc, itemlst);
3996 return stat == SS$_NORMAL ? 0 : -1;
3997 }
3998 }
3999
4000 #else /* not VMS4_4 */
4001
4002 #include <prvdef.h>
4003 #define ACE$M_WRITE 2
4004 #define ACE$C_KEYID 1
4005
4006 static unsigned short memid, grpid;
4007 static unsigned int uic;
4008
4009 /* Called from init_sys_modes, so it happens not very often
4010 but at least each time Emacs is loaded. */
4011 void
4012 sys_access_reinit ()
4013 {
4014 uic = 0;
4015 }
4016
4017 int
4018 sys_access (filename, type)
4019 char * filename;
4020 int type;
4021 {
4022 struct FAB fab;
4023 struct XABPRO xab;
4024 int status, size, i, typecode, acl_controlled;
4025 unsigned int *aclptr, *aclend, aclbuf[60];
4026 union prvdef prvmask;
4027
4028 /* Get UIC and GRP values for protection checking. */
4029 if (uic == 0)
4030 {
4031 status = LIB$GETJPI (&JPI$_UIC, 0, 0, &uic, 0, 0);
4032 if (! (status & 1))
4033 return -1;
4034 memid = uic & 0xFFFF;
4035 grpid = uic >> 16;
4036 }
4037
4038 if (type != 2) /* not checking write access */
4039 return access (filename, type);
4040
4041 /* Check write protection. */
4042
4043 #define CHECKPRIV(bit) (prvmask.bit)
4044 #define WRITABLE(field) (! ((xab.xab$w_pro >> field) & XAB$M_NOWRITE))
4045
4046 /* Find privilege bits */
4047 status = SYS$SETPRV (0, 0, 0, prvmask);
4048 if (! (status & 1))
4049 error ("Unable to find privileges: %s", vmserrstr (status));
4050 if (CHECKPRIV (PRV$V_BYPASS))
4051 return 0; /* BYPASS enabled */
4052 fab = cc$rms_fab;
4053 fab.fab$b_fac = FAB$M_GET;
4054 fab.fab$l_fna = filename;
4055 fab.fab$b_fns = strlen (filename);
4056 fab.fab$l_xab = &xab;
4057 xab = cc$rms_xabpro;
4058 xab.xab$l_aclbuf = aclbuf;
4059 xab.xab$w_aclsiz = sizeof (aclbuf);
4060 status = SYS$OPEN (&fab, 0, 0);
4061 if (! (status & 1))
4062 return -1;
4063 SYS$CLOSE (&fab, 0, 0);
4064 /* Check system access */
4065 if (CHECKPRIV (PRV$V_SYSPRV) && WRITABLE (XAB$V_SYS))
4066 return 0;
4067 /* Check ACL entries, if any */
4068 acl_controlled = 0;
4069 if (xab.xab$w_acllen > 0)
4070 {
4071 aclptr = aclbuf;
4072 aclend = &aclbuf[xab.xab$w_acllen / 4];
4073 while (*aclptr && aclptr < aclend)
4074 {
4075 size = (*aclptr & 0xff) / 4;
4076 typecode = (*aclptr >> 8) & 0xff;
4077 if (typecode == ACE$C_KEYID)
4078 for (i = size - 1; i > 1; i--)
4079 if (aclptr[i] == uic)
4080 {
4081 acl_controlled = 1;
4082 if (aclptr[1] & ACE$M_WRITE)
4083 return 0; /* Write access through ACL */
4084 }
4085 aclptr = &aclptr[size];
4086 }
4087 if (acl_controlled) /* ACL specified, prohibits write access */
4088 return -1;
4089 }
4090 /* No ACL entries specified, check normal protection */
4091 if (WRITABLE (XAB$V_WLD)) /* World writable */
4092 return 0;
4093 if (WRITABLE (XAB$V_GRP) &&
4094 (unsigned short) (xab.xab$l_uic >> 16) == grpid)
4095 return 0; /* Group writable */
4096 if (WRITABLE (XAB$V_OWN) &&
4097 (xab.xab$l_uic & 0xFFFF) == memid)
4098 return 0; /* Owner writable */
4099
4100 return -1; /* Not writable */
4101 }
4102 #endif /* not VMS4_4 */
4103 #endif /* access */
4104
4105 static char vtbuf[NAM$C_MAXRSS+1];
4106
4107 /* translate a vms file spec to a unix path */
4108 char *
4109 sys_translate_vms (vfile)
4110 char * vfile;
4111 {
4112 char * p;
4113 char * targ;
4114
4115 if (!vfile)
4116 return 0;
4117
4118 targ = vtbuf;
4119
4120 /* leading device or logical name is a root directory */
4121 if (p = strchr (vfile, ':'))
4122 {
4123 *targ++ = '/';
4124 while (vfile < p)
4125 *targ++ = *vfile++;
4126 vfile++;
4127 *targ++ = '/';
4128 }
4129 p = vfile;
4130 if (*p == '[' || *p == '<')
4131 {
4132 while (*++vfile != *p + 2)
4133 switch (*vfile)
4134 {
4135 case '.':
4136 if (vfile[-1] == *p)
4137 *targ++ = '.';
4138 *targ++ = '/';
4139 break;
4140
4141 case '-':
4142 *targ++ = '.';
4143 *targ++ = '.';
4144 break;
4145
4146 default:
4147 *targ++ = *vfile;
4148 break;
4149 }
4150 vfile++;
4151 *targ++ = '/';
4152 }
4153 while (*vfile)
4154 *targ++ = *vfile++;
4155
4156 return vtbuf;
4157 }
4158
4159 static char utbuf[NAM$C_MAXRSS+1];
4160
4161 /* translate a unix path to a VMS file spec */
4162 char *
4163 sys_translate_unix (ufile)
4164 char * ufile;
4165 {
4166 int slash_seen = 0;
4167 char *p;
4168 char * targ;
4169
4170 if (!ufile)
4171 return 0;
4172
4173 targ = utbuf;
4174
4175 if (*ufile == '/')
4176 {
4177 ufile++;
4178 }
4179
4180 while (*ufile)
4181 {
4182 switch (*ufile)
4183 {
4184 case '/':
4185 if (slash_seen)
4186 if (index (&ufile[1], '/'))
4187 *targ++ = '.';
4188 else
4189 *targ++ = ']';
4190 else
4191 {
4192 *targ++ = ':';
4193 if (index (&ufile[1], '/'))
4194 *targ++ = '[';
4195 slash_seen = 1;
4196 }
4197 break;
4198
4199 case '.':
4200 if (strncmp (ufile, "./", 2) == 0)
4201 {
4202 if (!slash_seen)
4203 {
4204 *targ++ = '[';
4205 slash_seen = 1;
4206 }
4207 ufile++; /* skip the dot */
4208 if (index (&ufile[1], '/'))
4209 *targ++ = '.';
4210 else
4211 *targ++ = ']';
4212 }
4213 else if (strncmp (ufile, "../", 3) == 0)
4214 {
4215 if (!slash_seen)
4216 {
4217 *targ++ = '[';
4218 slash_seen = 1;
4219 }
4220 *targ++ = '-';
4221 ufile += 2; /* skip the dots */
4222 if (index (&ufile[1], '/'))
4223 *targ++ = '.';
4224 else
4225 *targ++ = ']';
4226 }
4227 else
4228 *targ++ = *ufile;
4229 break;
4230
4231 default:
4232 *targ++ = *ufile;
4233 break;
4234 }
4235 ufile++;
4236 }
4237 *targ = '\0';
4238
4239 return utbuf;
4240 }
4241
4242 char *
4243 getwd (pathname)
4244 char *pathname;
4245 {
4246 char *ptr, *val;
4247 extern char *getcwd ();
4248
4249 #define MAXPATHLEN 1024
4250
4251 ptr = xmalloc (MAXPATHLEN);
4252 val = getcwd (ptr, MAXPATHLEN);
4253 if (val == 0)
4254 {
4255 xfree (ptr);
4256 return val;
4257 }
4258 strcpy (pathname, ptr);
4259 xfree (ptr);
4260
4261 return pathname;
4262 }
4263
4264 int
4265 getppid ()
4266 {
4267 long item_code = JPI$_OWNER;
4268 unsigned long parent_id;
4269 int status;
4270
4271 if (((status = LIB$GETJPI (&item_code, 0, 0, &parent_id)) & 1) == 0)
4272 {
4273 errno = EVMSERR;
4274 vaxc$errno = status;
4275 return -1;
4276 }
4277 return parent_id;
4278 }
4279
4280 #undef getuid
4281 unsigned
4282 sys_getuid ()
4283 {
4284 return (getgid () << 16) | getuid ();
4285 }
4286
4287 #undef read
4288 int
4289 sys_read (fildes, buf, nbyte)
4290 int fildes;
4291 char *buf;
4292 unsigned int nbyte;
4293 {
4294 return read (fildes, buf, (nbyte < MAXIOSIZE ? nbyte : MAXIOSIZE));
4295 }
4296
4297 #if 0
4298 int
4299 sys_write (fildes, buf, nbyte)
4300 int fildes;
4301 char *buf;
4302 unsigned int nbyte;
4303 {
4304 register int nwrote, rtnval = 0;
4305
4306 while (nbyte > MAXIOSIZE && (nwrote = write (fildes, buf, MAXIOSIZE)) > 0) {
4307 nbyte -= nwrote;
4308 buf += nwrote;
4309 rtnval += nwrote;
4310 }
4311 if (nwrote < 0)
4312 return rtnval ? rtnval : -1;
4313 if ((nwrote = write (fildes, buf, nbyte)) < 0)
4314 return rtnval ? rtnval : -1;
4315 return (rtnval + nwrote);
4316 }
4317 #endif /* 0 */
4318
4319 /*
4320 * VAX/VMS VAX C RTL really loses. It insists that records
4321 * end with a newline (carriage return) character, and if they
4322 * don't it adds one (nice of it isn't it!)
4323 *
4324 * Thus we do this stupidity below.
4325 */
4326
4327 #undef write
4328 int
4329 sys_write (fildes, buf, nbytes)
4330 int fildes;
4331 char *buf;
4332 unsigned int nbytes;
4333 {
4334 register char *p;
4335 register char *e;
4336 int sum = 0;
4337 struct stat st;
4338
4339 fstat (fildes, &st);
4340 p = buf;
4341 while (nbytes > 0)
4342 {
4343 int len, retval;
4344
4345 /* Handle fixed-length files with carriage control. */
4346 if (st.st_fab_rfm == FAB$C_FIX
4347 && ((st.st_fab_rat & (FAB$M_FTN | FAB$M_CR)) != 0))
4348 {
4349 len = st.st_fab_mrs;
4350 retval = write (fildes, p, min (len, nbytes));
4351 if (retval != len)
4352 return -1;
4353 retval++; /* This skips the implied carriage control */
4354 }
4355 else
4356 {
4357 e = p + min (MAXIOSIZE, nbytes) - 1;
4358 while (*e != '\n' && e > p) e--;
4359 if (p == e) /* Ok.. so here we add a newline... sigh. */
4360 e = p + min (MAXIOSIZE, nbytes) - 1;
4361 len = e + 1 - p;
4362 retval = write (fildes, p, len);
4363 if (retval != len)
4364 return -1;
4365 }
4366 p += retval;
4367 sum += retval;
4368 nbytes -= retval;
4369 }
4370 return sum;
4371 }
4372
4373 /* Create file NEW copying its attributes from file OLD. If
4374 OLD is 0 or does not exist, create based on the value of
4375 vms_stmlf_recfm. */
4376
4377 /* Protection value the file should ultimately have.
4378 Set by create_copy_attrs, and use by rename_sansversions. */
4379 static unsigned short int fab_final_pro;
4380
4381 int
4382 creat_copy_attrs (old, new)
4383 char *old, *new;
4384 {
4385 struct FAB fab = cc$rms_fab;
4386 struct XABPRO xabpro;
4387 char aclbuf[256]; /* Choice of size is arbitrary. See below. */
4388 extern int vms_stmlf_recfm;
4389
4390 if (old)
4391 {
4392 fab.fab$b_fac = FAB$M_GET;
4393 fab.fab$l_fna = old;
4394 fab.fab$b_fns = strlen (old);
4395 fab.fab$l_xab = (char *) &xabpro;
4396 xabpro = cc$rms_xabpro;
4397 xabpro.xab$l_aclbuf = aclbuf;
4398 xabpro.xab$w_aclsiz = sizeof aclbuf;
4399 /* Call $OPEN to fill in the fab & xabpro fields. */
4400 if (SYS$OPEN (&fab, 0, 0) & 1)
4401 {
4402 SYS$CLOSE (&fab, 0, 0);
4403 fab.fab$l_alq = 0; /* zero the allocation quantity */
4404 if (xabpro.xab$w_acllen > 0)
4405 {
4406 if (xabpro.xab$w_acllen > sizeof aclbuf)
4407 /* If the acl buffer was too short, redo open with longer one.
4408 Wouldn't need to do this if there were some system imposed
4409 limit on the size of an ACL, but I can't find any such. */
4410 {
4411 xabpro.xab$l_aclbuf = (char *) alloca (xabpro.xab$w_acllen);
4412 xabpro.xab$w_aclsiz = xabpro.xab$w_acllen;
4413 if (SYS$OPEN (&fab, 0, 0) & 1)
4414 SYS$CLOSE (&fab, 0, 0);
4415 else
4416 old = 0;
4417 }
4418 }
4419 else
4420 xabpro.xab$l_aclbuf = 0;
4421 }
4422 else
4423 old = 0;
4424 }
4425 fab.fab$l_fna = new;
4426 fab.fab$b_fns = strlen (new);
4427 if (!old)
4428 {
4429 fab.fab$l_xab = 0;
4430 fab.fab$b_rfm = vms_stmlf_recfm ? FAB$C_STMLF : FAB$C_VAR;
4431 fab.fab$b_rat = FAB$M_CR;
4432 }
4433
4434 /* Set the file protections such that we will be able to manipulate
4435 this file. Once we are done writing and renaming it, we will set
4436 the protections back. */
4437 if (old)
4438 fab_final_pro = xabpro.xab$w_pro;
4439 else
4440 SYS$SETDFPROT (0, &fab_final_pro);
4441 xabpro.xab$w_pro &= 0xff0f; /* set O:rewd for now. This is set back later. */
4442
4443 /* Create the new file with either default attrs or attrs copied
4444 from old file. */
4445 if (!(SYS$CREATE (&fab, 0, 0) & 1))
4446 return -1;
4447 SYS$CLOSE (&fab, 0, 0);
4448 /* As this is a "replacement" for creat, return a file descriptor
4449 opened for writing. */
4450 return open (new, O_WRONLY);
4451 }
4452
4453 #ifdef creat
4454 #undef creat
4455 #include <varargs.h>
4456 #ifdef __GNUC__
4457 #ifndef va_count
4458 #define va_count(X) ((X) = *(((int *) &(va_alist)) - 1))
4459 #endif
4460 #endif
4461
4462 int
4463 sys_creat (va_alist)
4464 va_dcl
4465 {
4466 va_list list_incrementer;
4467 char *name;
4468 int mode;
4469 int rfd; /* related file descriptor */
4470 int fd; /* Our new file descriptor */
4471 int count;
4472 struct stat st_buf;
4473 char rfm[12];
4474 char rat[15];
4475 char mrs[13];
4476 char fsz[13];
4477 extern int vms_stmlf_recfm;
4478
4479 va_count (count);
4480 va_start (list_incrementer);
4481 name = va_arg (list_incrementer, char *);
4482 mode = va_arg (list_incrementer, int);
4483 if (count > 2)
4484 rfd = va_arg (list_incrementer, int);
4485 va_end (list_incrementer);
4486 if (count > 2)
4487 {
4488 /* Use information from the related file descriptor to set record
4489 format of the newly created file. */
4490 fstat (rfd, &st_buf);
4491 switch (st_buf.st_fab_rfm)
4492 {
4493 case FAB$C_FIX:
4494 strcpy (rfm, "rfm = fix");
4495 sprintf (mrs, "mrs = %d", st_buf.st_fab_mrs);
4496 strcpy (rat, "rat = ");
4497 if (st_buf.st_fab_rat & FAB$M_CR)
4498 strcat (rat, "cr");
4499 else if (st_buf.st_fab_rat & FAB$M_FTN)
4500 strcat (rat, "ftn");
4501 else if (st_buf.st_fab_rat & FAB$M_PRN)
4502 strcat (rat, "prn");
4503 if (st_buf.st_fab_rat & FAB$M_BLK)
4504 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4505 strcat (rat, ", blk");
4506 else
4507 strcat (rat, "blk");
4508 return creat (name, 0, rfm, rat, mrs);
4509
4510 case FAB$C_VFC:
4511 strcpy (rfm, "rfm = vfc");
4512 sprintf (fsz, "fsz = %d", st_buf.st_fab_fsz);
4513 strcpy (rat, "rat = ");
4514 if (st_buf.st_fab_rat & FAB$M_CR)
4515 strcat (rat, "cr");
4516 else if (st_buf.st_fab_rat & FAB$M_FTN)
4517 strcat (rat, "ftn");
4518 else if (st_buf.st_fab_rat & FAB$M_PRN)
4519 strcat (rat, "prn");
4520 if (st_buf.st_fab_rat & FAB$M_BLK)
4521 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4522 strcat (rat, ", blk");
4523 else
4524 strcat (rat, "blk");
4525 return creat (name, 0, rfm, rat, fsz);
4526
4527 case FAB$C_STM:
4528 strcpy (rfm, "rfm = stm");
4529 break;
4530
4531 case FAB$C_STMCR:
4532 strcpy (rfm, "rfm = stmcr");
4533 break;
4534
4535 case FAB$C_STMLF:
4536 strcpy (rfm, "rfm = stmlf");
4537 break;
4538
4539 case FAB$C_UDF:
4540 strcpy (rfm, "rfm = udf");
4541 break;
4542
4543 case FAB$C_VAR:
4544 strcpy (rfm, "rfm = var");
4545 break;
4546 }
4547 strcpy (rat, "rat = ");
4548 if (st_buf.st_fab_rat & FAB$M_CR)
4549 strcat (rat, "cr");
4550 else if (st_buf.st_fab_rat & FAB$M_FTN)
4551 strcat (rat, "ftn");
4552 else if (st_buf.st_fab_rat & FAB$M_PRN)
4553 strcat (rat, "prn");
4554 if (st_buf.st_fab_rat & FAB$M_BLK)
4555 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4556 strcat (rat, ", blk");
4557 else
4558 strcat (rat, "blk");
4559 }
4560 else
4561 {
4562 strcpy (rfm, vms_stmlf_recfm ? "rfm = stmlf" : "rfm=var");
4563 strcpy (rat, "rat=cr");
4564 }
4565 /* Until the VAX C RTL fixes the many bugs with modes, always use
4566 mode 0 to get the user's default protection. */
4567 fd = creat (name, 0, rfm, rat);
4568 if (fd < 0 && errno == EEXIST)
4569 {
4570 if (unlink (name) < 0)
4571 report_file_error ("delete", build_string (name));
4572 fd = creat (name, 0, rfm, rat);
4573 }
4574 return fd;
4575 }
4576 #endif /* creat */
4577
4578 /* fwrite to stdout is S L O W. Speed it up by using fputc...*/
4579 int
4580 sys_fwrite (ptr, size, num, fp)
4581 register char * ptr;
4582 FILE * fp;
4583 {
4584 register int tot = num * size;
4585
4586 while (tot--)
4587 fputc (*ptr++, fp);
4588 return num;
4589 }
4590
4591 /*
4592 * The VMS C library routine creat actually creates a new version of an
4593 * existing file rather than truncating the old version. There are times
4594 * when this is not the desired behavior, for instance, when writing an
4595 * auto save file (you only want one version), or when you don't have
4596 * write permission in the directory containing the file (but the file
4597 * itself is writable). Hence this routine, which is equivalent to
4598 * "close (creat (fn, 0));" on Unix if fn already exists.
4599 */
4600 int
4601 vms_truncate (fn)
4602 char *fn;
4603 {
4604 struct FAB xfab = cc$rms_fab;
4605 struct RAB xrab = cc$rms_rab;
4606 int status;
4607
4608 xfab.fab$l_fop = FAB$M_TEF; /* free allocated but unused blocks on close */
4609 xfab.fab$b_fac = FAB$M_TRN | FAB$M_GET; /* allow truncate and get access */
4610 xfab.fab$b_shr = FAB$M_NIL; /* allow no sharing - file must be locked */
4611 xfab.fab$l_fna = fn;
4612 xfab.fab$b_fns = strlen (fn);
4613 xfab.fab$l_dna = ";0"; /* default to latest version of the file */
4614 xfab.fab$b_dns = 2;
4615 xrab.rab$l_fab = &xfab;
4616
4617 /* This gibberish opens the file, positions to the first record, and
4618 deletes all records from there until the end of file. */
4619 if ((SYS$OPEN (&xfab) & 01) == 01)
4620 {
4621 if ((SYS$CONNECT (&xrab) & 01) == 01 &&
4622 (SYS$FIND (&xrab) & 01) == 01 &&
4623 (SYS$TRUNCATE (&xrab) & 01) == 01)
4624 status = 0;
4625 else
4626 status = -1;
4627 }
4628 else
4629 status = -1;
4630 SYS$CLOSE (&xfab);
4631 return status;
4632 }
4633
4634 /* Define this symbol to actually read SYSUAF.DAT. This requires either
4635 SYSPRV or a readable SYSUAF.DAT. */
4636
4637 #ifdef READ_SYSUAF
4638 /*
4639 * getuaf.c
4640 *
4641 * Routine to read the VMS User Authorization File and return
4642 * a specific user's record.
4643 */
4644
4645 static struct UAF retuaf;
4646
4647 struct UAF *
4648 get_uaf_name (uname)
4649 char * uname;
4650 {
4651 register status;
4652 struct FAB uaf_fab;
4653 struct RAB uaf_rab;
4654
4655 uaf_fab = cc$rms_fab;
4656 uaf_rab = cc$rms_rab;
4657 /* initialize fab fields */
4658 uaf_fab.fab$l_fna = "SYS$SYSTEM:SYSUAF.DAT";
4659 uaf_fab.fab$b_fns = 21;
4660 uaf_fab.fab$b_fac = FAB$M_GET;
4661 uaf_fab.fab$b_org = FAB$C_IDX;
4662 uaf_fab.fab$b_shr = FAB$M_GET|FAB$M_PUT|FAB$M_UPD|FAB$M_DEL;
4663 /* initialize rab fields */
4664 uaf_rab.rab$l_fab = &uaf_fab;
4665 /* open the User Authorization File */
4666 status = SYS$OPEN (&uaf_fab);
4667 if (!(status&1))
4668 {
4669 errno = EVMSERR;
4670 vaxc$errno = status;
4671 return 0;
4672 }
4673 status = SYS$CONNECT (&uaf_rab);
4674 if (!(status&1))
4675 {
4676 errno = EVMSERR;
4677 vaxc$errno = status;
4678 return 0;
4679 }
4680 /* read the requested record - index is in uname */
4681 uaf_rab.rab$l_kbf = uname;
4682 uaf_rab.rab$b_ksz = strlen (uname);
4683 uaf_rab.rab$b_rac = RAB$C_KEY;
4684 uaf_rab.rab$l_ubf = (char *)&retuaf;
4685 uaf_rab.rab$w_usz = sizeof retuaf;
4686 status = SYS$GET (&uaf_rab);
4687 if (!(status&1))
4688 {
4689 errno = EVMSERR;
4690 vaxc$errno = status;
4691 return 0;
4692 }
4693 /* close the User Authorization File */
4694 status = SYS$DISCONNECT (&uaf_rab);
4695 if (!(status&1))
4696 {
4697 errno = EVMSERR;
4698 vaxc$errno = status;
4699 return 0;
4700 }
4701 status = SYS$CLOSE (&uaf_fab);
4702 if (!(status&1))
4703 {
4704 errno = EVMSERR;
4705 vaxc$errno = status;
4706 return 0;
4707 }
4708 return &retuaf;
4709 }
4710
4711 struct UAF *
4712 get_uaf_uic (uic)
4713 unsigned long uic;
4714 {
4715 register status;
4716 struct FAB uaf_fab;
4717 struct RAB uaf_rab;
4718
4719 uaf_fab = cc$rms_fab;
4720 uaf_rab = cc$rms_rab;
4721 /* initialize fab fields */
4722 uaf_fab.fab$l_fna = "SYS$SYSTEM:SYSUAF.DAT";
4723 uaf_fab.fab$b_fns = 21;
4724 uaf_fab.fab$b_fac = FAB$M_GET;
4725 uaf_fab.fab$b_org = FAB$C_IDX;
4726 uaf_fab.fab$b_shr = FAB$M_GET|FAB$M_PUT|FAB$M_UPD|FAB$M_DEL;
4727 /* initialize rab fields */
4728 uaf_rab.rab$l_fab = &uaf_fab;
4729 /* open the User Authorization File */
4730 status = SYS$OPEN (&uaf_fab);
4731 if (!(status&1))
4732 {
4733 errno = EVMSERR;
4734 vaxc$errno = status;
4735 return 0;
4736 }
4737 status = SYS$CONNECT (&uaf_rab);
4738 if (!(status&1))
4739 {
4740 errno = EVMSERR;
4741 vaxc$errno = status;
4742 return 0;
4743 }
4744 /* read the requested record - index is in uic */
4745 uaf_rab.rab$b_krf = 1; /* 1st alternate key */
4746 uaf_rab.rab$l_kbf = (char *) &uic;
4747 uaf_rab.rab$b_ksz = sizeof uic;
4748 uaf_rab.rab$b_rac = RAB$C_KEY;
4749 uaf_rab.rab$l_ubf = (char *)&retuaf;
4750 uaf_rab.rab$w_usz = sizeof retuaf;
4751 status = SYS$GET (&uaf_rab);
4752 if (!(status&1))
4753 {
4754 errno = EVMSERR;
4755 vaxc$errno = status;
4756 return 0;
4757 }
4758 /* close the User Authorization File */
4759 status = SYS$DISCONNECT (&uaf_rab);
4760 if (!(status&1))
4761 {
4762 errno = EVMSERR;
4763 vaxc$errno = status;
4764 return 0;
4765 }
4766 status = SYS$CLOSE (&uaf_fab);
4767 if (!(status&1))
4768 {
4769 errno = EVMSERR;
4770 vaxc$errno = status;
4771 return 0;
4772 }
4773 return &retuaf;
4774 }
4775
4776 static struct passwd retpw;
4777
4778 struct passwd *
4779 cnv_uaf_pw (up)
4780 struct UAF * up;
4781 {
4782 char * ptr;
4783
4784 /* copy these out first because if the username is 32 chars, the next
4785 section will overwrite the first byte of the UIC */
4786 retpw.pw_uid = up->uaf$w_mem;
4787 retpw.pw_gid = up->uaf$w_grp;
4788
4789 /* I suppose this is not the best style, to possibly overwrite one
4790 byte beyond the end of the field, but what the heck... */
4791 ptr = &up->uaf$t_username[UAF$S_USERNAME];
4792 while (ptr[-1] == ' ')
4793 ptr--;
4794 *ptr = '\0';
4795 strcpy (retpw.pw_name, up->uaf$t_username);
4796
4797 /* the rest of these are counted ascii strings */
4798 strncpy (retpw.pw_gecos, &up->uaf$t_owner[1], up->uaf$t_owner[0]);
4799 retpw.pw_gecos[up->uaf$t_owner[0]] = '\0';
4800 strncpy (retpw.pw_dir, &up->uaf$t_defdev[1], up->uaf$t_defdev[0]);
4801 retpw.pw_dir[up->uaf$t_defdev[0]] = '\0';
4802 strncat (retpw.pw_dir, &up->uaf$t_defdir[1], up->uaf$t_defdir[0]);
4803 retpw.pw_dir[up->uaf$t_defdev[0] + up->uaf$t_defdir[0]] = '\0';
4804 strncpy (retpw.pw_shell, &up->uaf$t_defcli[1], up->uaf$t_defcli[0]);
4805 retpw.pw_shell[up->uaf$t_defcli[0]] = '\0';
4806
4807 return &retpw;
4808 }
4809 #else /* not READ_SYSUAF */
4810 static struct passwd retpw;
4811 #endif /* not READ_SYSUAF */
4812
4813 struct passwd *
4814 getpwnam (name)
4815 char * name;
4816 {
4817 #ifdef READ_SYSUAF
4818 struct UAF *up;
4819 #else
4820 char * user;
4821 char * dir;
4822 unsigned char * full;
4823 #endif /* READ_SYSUAF */
4824 char *ptr = name;
4825
4826 while (*ptr)
4827 {
4828 if ('a' <= *ptr && *ptr <= 'z')
4829 *ptr -= 040;
4830 ptr++;
4831 }
4832 #ifdef READ_SYSUAF
4833 if (!(up = get_uaf_name (name)))
4834 return 0;
4835 return cnv_uaf_pw (up);
4836 #else
4837 if (strcmp (name, getenv ("USER")) == 0)
4838 {
4839 retpw.pw_uid = getuid ();
4840 retpw.pw_gid = getgid ();
4841 strcpy (retpw.pw_name, name);
4842 if (full = egetenv ("FULLNAME"))
4843 strcpy (retpw.pw_gecos, full);
4844 else
4845 *retpw.pw_gecos = '\0';
4846 strcpy (retpw.pw_dir, egetenv ("HOME"));
4847 *retpw.pw_shell = '\0';
4848 return &retpw;
4849 }
4850 else
4851 return 0;
4852 #endif /* not READ_SYSUAF */
4853 }
4854
4855 struct passwd *
4856 getpwuid (uid)
4857 unsigned long uid;
4858 {
4859 #ifdef READ_SYSUAF
4860 struct UAF * up;
4861
4862 if (!(up = get_uaf_uic (uid)))
4863 return 0;
4864 return cnv_uaf_pw (up);
4865 #else
4866 if (uid == sys_getuid ())
4867 return getpwnam (egetenv ("USER"));
4868 else
4869 return 0;
4870 #endif /* not READ_SYSUAF */
4871 }
4872
4873 /* return total address space available to the current process. This is
4874 the sum of the current p0 size, p1 size and free page table entries
4875 available. */
4876 int
4877 vlimit ()
4878 {
4879 int item_code;
4880 unsigned long free_pages;
4881 unsigned long frep0va;
4882 unsigned long frep1va;
4883 register status;
4884
4885 item_code = JPI$_FREPTECNT;
4886 if (((status = LIB$GETJPI (&item_code, 0, 0, &free_pages)) & 1) == 0)
4887 {
4888 errno = EVMSERR;
4889 vaxc$errno = status;
4890 return -1;
4891 }
4892 free_pages *= 512;
4893
4894 item_code = JPI$_FREP0VA;
4895 if (((status = LIB$GETJPI (&item_code, 0, 0, &frep0va)) & 1) == 0)
4896 {
4897 errno = EVMSERR;
4898 vaxc$errno = status;
4899 return -1;
4900 }
4901 item_code = JPI$_FREP1VA;
4902 if (((status = LIB$GETJPI (&item_code, 0, 0, &frep1va)) & 1) == 0)
4903 {
4904 errno = EVMSERR;
4905 vaxc$errno = status;
4906 return -1;
4907 }
4908
4909 return free_pages + frep0va + (0x7fffffff - frep1va);
4910 }
4911
4912 int
4913 define_logical_name (varname, string)
4914 char *varname;
4915 char *string;
4916 {
4917 struct dsc$descriptor_s strdsc =
4918 {strlen (string), DSC$K_DTYPE_T, DSC$K_CLASS_S, string};
4919 struct dsc$descriptor_s envdsc =
4920 {strlen (varname), DSC$K_DTYPE_T, DSC$K_CLASS_S, varname};
4921 struct dsc$descriptor_s lnmdsc =
4922 {7, DSC$K_DTYPE_T, DSC$K_CLASS_S, "LNM$JOB"};
4923
4924 return LIB$SET_LOGICAL (&envdsc, &strdsc, &lnmdsc, 0, 0);
4925 }
4926
4927 int
4928 delete_logical_name (varname)
4929 char *varname;
4930 {
4931 struct dsc$descriptor_s envdsc =
4932 {strlen (varname), DSC$K_DTYPE_T, DSC$K_CLASS_S, varname};
4933 struct dsc$descriptor_s lnmdsc =
4934 {7, DSC$K_DTYPE_T, DSC$K_CLASS_S, "LNM$JOB"};
4935
4936 return LIB$DELETE_LOGICAL (&envdsc, &lnmdsc);
4937 }
4938
4939 int
4940 ulimit ()
4941 {
4942 return 0;
4943 }
4944
4945 int
4946 setpgrp ()
4947 {
4948 return 0;
4949 }
4950
4951 int
4952 execvp ()
4953 {
4954 error ("execvp system call not implemented");
4955 return -1;
4956 }
4957
4958 int
4959 rename (from, to)
4960 char *from, *to;
4961 {
4962 int status;
4963 struct FAB from_fab = cc$rms_fab, to_fab = cc$rms_fab;
4964 struct NAM from_nam = cc$rms_nam, to_nam = cc$rms_nam;
4965 char from_esn[NAM$C_MAXRSS];
4966 char to_esn[NAM$C_MAXRSS];
4967
4968 from_fab.fab$l_fna = from;
4969 from_fab.fab$b_fns = strlen (from);
4970 from_fab.fab$l_nam = &from_nam;
4971 from_fab.fab$l_fop = FAB$M_NAM;
4972
4973 from_nam.nam$l_esa = from_esn;
4974 from_nam.nam$b_ess = sizeof from_esn;
4975
4976 to_fab.fab$l_fna = to;
4977 to_fab.fab$b_fns = strlen (to);
4978 to_fab.fab$l_nam = &to_nam;
4979 to_fab.fab$l_fop = FAB$M_NAM;
4980
4981 to_nam.nam$l_esa = to_esn;
4982 to_nam.nam$b_ess = sizeof to_esn;
4983
4984 status = SYS$RENAME (&from_fab, 0, 0, &to_fab);
4985
4986 if (status & 1)
4987 return 0;
4988 else
4989 {
4990 if (status == RMS$_DEV)
4991 errno = EXDEV;
4992 else
4993 errno = EVMSERR;
4994 vaxc$errno = status;
4995 return -1;
4996 }
4997 }
4998
4999 /* This function renames a file like `rename', but it strips
5000 the version number from the "to" filename, such that the "to" file is
5001 will always be a new version. It also sets the file protection once it is
5002 finished. The protection that we will use is stored in fab_final_pro,
5003 and was set when we did a creat_copy_attrs to create the file that we
5004 are renaming.
5005
5006 We could use the chmod function, but Eunichs uses 3 bits per user category
5007 to describe the protection, and VMS uses 4 (write and delete are separate
5008 bits). To maintain portability, the VMS implementation of `chmod' wires
5009 the W and D bits together. */
5010
5011
5012 static struct fibdef fib; /* We need this initialized to zero */
5013 char vms_file_written[NAM$C_MAXRSS];
5014
5015 int
5016 rename_sans_version (from,to)
5017 char *from, *to;
5018 {
5019 short int chan;
5020 int stat;
5021 short int iosb[4];
5022 int status;
5023 struct FAB to_fab = cc$rms_fab;
5024 struct NAM to_nam = cc$rms_nam;
5025 struct dsc$descriptor fib_d ={sizeof (fib),0,0,(char*) &fib};
5026 struct dsc$descriptor fib_attr[2]
5027 = {{sizeof (fab_final_pro),ATR$C_FPRO,0,(char*) &fab_final_pro},{0,0,0,0}};
5028 char to_esn[NAM$C_MAXRSS];
5029
5030 $DESCRIPTOR (disk,to_esn);
5031
5032 to_fab.fab$l_fna = to;
5033 to_fab.fab$b_fns = strlen (to);
5034 to_fab.fab$l_nam = &to_nam;
5035 to_fab.fab$l_fop = FAB$M_NAM;
5036
5037 to_nam.nam$l_esa = to_esn;
5038 to_nam.nam$b_ess = sizeof to_esn;
5039
5040 status = SYS$PARSE (&to_fab, 0, 0); /* figure out the full file name */
5041
5042 if (to_nam.nam$l_fnb && NAM$M_EXP_VER)
5043 *(to_nam.nam$l_ver) = '\0';
5044
5045 stat = rename (from, to_esn);
5046 if (stat < 0)
5047 return stat;
5048
5049 strcpy (vms_file_written, to_esn);
5050
5051 to_fab.fab$l_fna = vms_file_written; /* this points to the versionless name */
5052 to_fab.fab$b_fns = strlen (vms_file_written);
5053
5054 /* Now set the file protection to the correct value */
5055 SYS$OPEN (&to_fab, 0, 0); /* This fills in the nam$w_fid fields */
5056
5057 /* Copy these fields into the fib */
5058 fib.fib$r_fid_overlay.fib$w_fid[0] = to_nam.nam$w_fid[0];
5059 fib.fib$r_fid_overlay.fib$w_fid[1] = to_nam.nam$w_fid[1];
5060 fib.fib$r_fid_overlay.fib$w_fid[2] = to_nam.nam$w_fid[2];
5061
5062 SYS$CLOSE (&to_fab, 0, 0);
5063
5064 stat = SYS$ASSIGN (&disk, &chan, 0, 0); /* open a channel to the disk */
5065 if (!stat)
5066 LIB$SIGNAL (stat);
5067 stat = SYS$QIOW (0, chan, IO$_MODIFY, iosb, 0, 0, &fib_d,
5068 0, 0, 0, &fib_attr, 0);
5069 if (!stat)
5070 LIB$SIGNAL (stat);
5071 stat = SYS$DASSGN (chan);
5072 if (!stat)
5073 LIB$SIGNAL (stat);
5074 strcpy (vms_file_written, to_esn); /* We will write this to the terminal*/
5075 return 0;
5076 }
5077
5078 int
5079 link (file, new)
5080 char * file, * new;
5081 {
5082 register status;
5083 struct FAB fab;
5084 struct NAM nam;
5085 unsigned short fid[3];
5086 char esa[NAM$C_MAXRSS];
5087
5088 fab = cc$rms_fab;
5089 fab.fab$l_fop = FAB$M_OFP;
5090 fab.fab$l_fna = file;
5091 fab.fab$b_fns = strlen (file);
5092 fab.fab$l_nam = &nam;
5093
5094 nam = cc$rms_nam;
5095 nam.nam$l_esa = esa;
5096 nam.nam$b_ess = NAM$C_MAXRSS;
5097
5098 status = SYS$PARSE (&fab);
5099 if ((status & 1) == 0)
5100 {
5101 errno = EVMSERR;
5102 vaxc$errno = status;
5103 return -1;
5104 }
5105 status = SYS$SEARCH (&fab);
5106 if ((status & 1) == 0)
5107 {
5108 errno = EVMSERR;
5109 vaxc$errno = status;
5110 return -1;
5111 }
5112
5113 fid[0] = nam.nam$w_fid[0];
5114 fid[1] = nam.nam$w_fid[1];
5115 fid[2] = nam.nam$w_fid[2];
5116
5117 fab.fab$l_fna = new;
5118 fab.fab$b_fns = strlen (new);
5119
5120 status = SYS$PARSE (&fab);
5121 if ((status & 1) == 0)
5122 {
5123 errno = EVMSERR;
5124 vaxc$errno = status;
5125 return -1;
5126 }
5127
5128 nam.nam$w_fid[0] = fid[0];
5129 nam.nam$w_fid[1] = fid[1];
5130 nam.nam$w_fid[2] = fid[2];
5131
5132 nam.nam$l_esa = nam.nam$l_name;
5133 nam.nam$b_esl = nam.nam$b_name + nam.nam$b_type + nam.nam$b_ver;
5134
5135 status = SYS$ENTER (&fab);
5136 if ((status & 1) == 0)
5137 {
5138 errno = EVMSERR;
5139 vaxc$errno = status;
5140 return -1;
5141 }
5142
5143 return 0;
5144 }
5145
5146 void
5147 croak (badfunc)
5148 char *badfunc;
5149 {
5150 printf ("%s not yet implemented\r\n", badfunc);
5151 reset_all_sys_modes ();
5152 exit (1);
5153 }
5154
5155 long
5156 random ()
5157 {
5158 /* Arrange to return a range centered on zero. */
5159 return rand () - (1 << 30);
5160 }
5161
5162 void
5163 srandom (seed)
5164 {
5165 srand (seed);
5166 }
5167 #endif /* VMS */
5168 \f
5169 #ifdef AIXHFT
5170
5171 /* Called from init_sys_modes. */
5172 void
5173 hft_init (struct tty_display_info *tty_out)
5174 {
5175 int junk;
5176
5177 /* If we're not on an HFT we shouldn't do any of this. We determine
5178 if we are on an HFT by trying to get an HFT error code. If this
5179 call fails, we're not on an HFT. */
5180 #ifdef IBMR2AIX
5181 if (ioctl (0, HFQERROR, &junk) < 0)
5182 return;
5183 #else /* not IBMR2AIX */
5184 if (ioctl (0, HFQEIO, 0) < 0)
5185 return;
5186 #endif /* not IBMR2AIX */
5187
5188 /* On AIX the default hft keyboard mapping uses backspace rather than delete
5189 as the rubout key's ASCII code. Here this is changed. The bug is that
5190 there's no way to determine the old mapping, so in reset_sys_modes
5191 we need to assume that the normal map had been present. Of course, this
5192 code also doesn't help if on a terminal emulator which doesn't understand
5193 HFT VTD's. */
5194 {
5195 struct hfbuf buf;
5196 struct hfkeymap keymap;
5197
5198 buf.hf_bufp = (char *)&keymap;
5199 buf.hf_buflen = sizeof (keymap);
5200 keymap.hf_nkeys = 2;
5201 keymap.hfkey[0].hf_kpos = 15;
5202 keymap.hfkey[0].hf_kstate = HFMAPCHAR | HFSHFNONE;
5203 #ifdef IBMR2AIX
5204 keymap.hfkey[0].hf_keyidh = '<';
5205 #else /* not IBMR2AIX */
5206 keymap.hfkey[0].hf_page = '<';
5207 #endif /* not IBMR2AIX */
5208 keymap.hfkey[0].hf_char = 127;
5209 keymap.hfkey[1].hf_kpos = 15;
5210 keymap.hfkey[1].hf_kstate = HFMAPCHAR | HFSHFSHFT;
5211 #ifdef IBMR2AIX
5212 keymap.hfkey[1].hf_keyidh = '<';
5213 #else /* not IBMR2AIX */
5214 keymap.hfkey[1].hf_page = '<';
5215 #endif /* not IBMR2AIX */
5216 keymap.hfkey[1].hf_char = 127;
5217 hftctl (0, HFSKBD, &buf);
5218 }
5219 }
5220
5221 /* Reset the rubout key to backspace. */
5222
5223 void
5224 hft_reset (struct tty_display_info *tty_out)
5225 {
5226 struct hfbuf buf;
5227 struct hfkeymap keymap;
5228 int junk;
5229
5230 #ifdef IBMR2AIX
5231 if (ioctl (0, HFQERROR, &junk) < 0)
5232 return;
5233 #else /* not IBMR2AIX */
5234 if (ioctl (0, HFQEIO, 0) < 0)
5235 return;
5236 #endif /* not IBMR2AIX */
5237
5238 buf.hf_bufp = (char *)&keymap;
5239 buf.hf_buflen = sizeof (keymap);
5240 keymap.hf_nkeys = 2;
5241 keymap.hfkey[0].hf_kpos = 15;
5242 keymap.hfkey[0].hf_kstate = HFMAPCHAR | HFSHFNONE;
5243 #ifdef IBMR2AIX
5244 keymap.hfkey[0].hf_keyidh = '<';
5245 #else /* not IBMR2AIX */
5246 keymap.hfkey[0].hf_page = '<';
5247 #endif /* not IBMR2AIX */
5248 keymap.hfkey[0].hf_char = 8;
5249 keymap.hfkey[1].hf_kpos = 15;
5250 keymap.hfkey[1].hf_kstate = HFMAPCHAR | HFSHFSHFT;
5251 #ifdef IBMR2AIX
5252 keymap.hfkey[1].hf_keyidh = '<';
5253 #else /* not IBMR2AIX */
5254 keymap.hfkey[1].hf_page = '<';
5255 #endif /* not IBMR2AIX */
5256 keymap.hfkey[1].hf_char = 8;
5257 hftctl (0, HFSKBD, &buf);
5258 }
5259
5260 #endif /* AIXHFT */
5261
5262 #ifdef USE_DL_STUBS
5263
5264 /* These are included on Sunos 4.1 when we do not use shared libraries.
5265 X11 libraries may refer to these functions but (we hope) do not
5266 actually call them. */
5267
5268 void *
5269 dlopen ()
5270 {
5271 return 0;
5272 }
5273
5274 void *
5275 dlsym ()
5276 {
5277 return 0;
5278 }
5279
5280 int
5281 dlclose ()
5282 {
5283 return -1;
5284 }
5285
5286 #endif /* USE_DL_STUBS */
5287 \f
5288 #ifndef BSTRING
5289
5290 #ifndef bzero
5291
5292 void
5293 bzero (b, length)
5294 register char *b;
5295 register int length;
5296 {
5297 #ifdef VMS
5298 short zero = 0;
5299 long max_str = 65535;
5300
5301 while (length > max_str) {
5302 (void) LIB$MOVC5 (&zero, &zero, &zero, &max_str, b);
5303 length -= max_str;
5304 b += max_str;
5305 }
5306 max_str = length;
5307 (void) LIB$MOVC5 (&zero, &zero, &zero, &max_str, b);
5308 #else
5309 while (length-- > 0)
5310 *b++ = 0;
5311 #endif /* not VMS */
5312 }
5313
5314 #endif /* no bzero */
5315 #endif /* BSTRING */
5316
5317 #if (!defined (BSTRING) && !defined (bcopy)) || defined (NEED_BCOPY)
5318 #undef bcopy
5319
5320 /* Saying `void' requires a declaration, above, where bcopy is used
5321 and that declaration causes pain for systems where bcopy is a macro. */
5322 bcopy (b1, b2, length)
5323 register char *b1;
5324 register char *b2;
5325 register int length;
5326 {
5327 #ifdef VMS
5328 long max_str = 65535;
5329
5330 while (length > max_str) {
5331 (void) LIB$MOVC3 (&max_str, b1, b2);
5332 length -= max_str;
5333 b1 += max_str;
5334 b2 += max_str;
5335 }
5336 max_str = length;
5337 (void) LIB$MOVC3 (&length, b1, b2);
5338 #else
5339 while (length-- > 0)
5340 *b2++ = *b1++;
5341 #endif /* not VMS */
5342 }
5343 #endif /* (!defined (BSTRING) && !defined (bcopy)) || defined (NEED_BCOPY) */
5344
5345 #ifndef BSTRING
5346 #ifndef bcmp
5347 int
5348 bcmp (b1, b2, length) /* This could be a macro! */
5349 register char *b1;
5350 register char *b2;
5351 register int length;
5352 {
5353 #ifdef VMS
5354 struct dsc$descriptor_s src1 = {length, DSC$K_DTYPE_T, DSC$K_CLASS_S, b1};
5355 struct dsc$descriptor_s src2 = {length, DSC$K_DTYPE_T, DSC$K_CLASS_S, b2};
5356
5357 return STR$COMPARE (&src1, &src2);
5358 #else
5359 while (length-- > 0)
5360 if (*b1++ != *b2++)
5361 return 1;
5362
5363 return 0;
5364 #endif /* not VMS */
5365 }
5366 #endif /* no bcmp */
5367 #endif /* not BSTRING */
5368 \f
5369 #ifndef HAVE_STRSIGNAL
5370 char *
5371 strsignal (code)
5372 int code;
5373 {
5374 char *signame = 0;
5375
5376 if (0 <= code && code < NSIG)
5377 {
5378 #ifdef VMS
5379 signame = sys_errlist[code];
5380 #else
5381 /* Cast to suppress warning if the table has const char *. */
5382 signame = (char *) sys_siglist[code];
5383 #endif
5384 }
5385
5386 return signame;
5387 }
5388 #endif /* HAVE_STRSIGNAL */
5389
5390 /* arch-tag: edb43589-4e09-4544-b325-978b5b121dcf
5391 (do not change this comment) */