HCoop / bpt / emacs.git / blob
? search:


5a2bb449df10764cd330d6fed275d0df7ae07477
[bpt/emacs.git] / src / sysdep.c
1 /* Interfaces to system-dependent kernel and library entries.
2 Copyright (C) 1985, 86,87,88,93,94,95,1999,2000,01,2003
3 Free Software Foundation, Inc.
4
5 This file is part of GNU Emacs.
6
7 GNU Emacs is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
10 any later version.
11
12 GNU Emacs is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs; see the file COPYING. If not, write to
19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
21
22 #ifdef HAVE_CONFIG_H
23 #include <config.h>
24 #endif
25
26 #include <signal.h>
27 #include <setjmp.h>
28 #ifdef HAVE_UNISTD_H
29 #include <unistd.h>
30 #endif
31 #include "lisp.h"
32 /* Including stdlib.h isn't necessarily enough to get srandom
33 declared, e.g. without __USE_XOPEN_EXTENDED with glibc 2. */
34 #ifdef HAVE_RANDOM
35 #if 0 /* It turns out that defining _OSF_SOURCE in osf5-0.h gets
36 random prototyped as returning `int'. It looks to me as
37 though the best way to DTRT is to prefer the rand48 functions
38 (per libc.info). -- fx */
39 extern long int random P_ ((void));
40 #endif
41 #if 0 /* Don't prototype srandom; it takes an unsigned argument on
42 some systems, and an unsigned long on others, like FreeBSD
43 4.1. */
44 extern void srandom P_ ((unsigned int));
45 #endif
46 #endif
47
48 #include "sysselect.h"
49
50 #include "blockinput.h"
51 #undef NULL
52
53 #ifdef MAC_OS8
54 /* It is essential to include stdlib.h so that this file picks up
55 the correct definitions of rand, srand, and RAND_MAX.
56 Otherwise random numbers will not work correctly. */
57 #include <stdlib.h>
58
59 #ifndef subprocesses
60 /* Nonzero means delete a process right away if it exits (process.c). */
61 static int delete_exited_processes;
62 #endif
63 #endif /* MAC_OS8 */
64
65 #ifdef WINDOWSNT
66 #define read sys_read
67 #define write sys_write
68 #include <windows.h>
69 #ifndef NULL
70 #define NULL 0
71 #endif
72 #endif /* not WINDOWSNT */
73
74 #ifdef HAVE_CARBON
75 #define read sys_read
76 #endif
77
78 /* Does anyone other than VMS need this? */
79 #ifndef fwrite
80 #define sys_fwrite fwrite
81 #else
82 #undef fwrite
83 #endif
84
85 #include <stdio.h>
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 (TTY_INPUT (CURTTY())), 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 ioctl (fileno (TTY_INPUT (tty)), TIOCFLUSH, &zero);
288 }
289 }
290 #else /* not Apollo */
291 #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */
292 while (dos_keyread () != -1)
293 ;
294 #else /* not MSDOS */
295 {
296 struct tty_display_info *tty;
297 for (tty = tty_list; tty; tty = tty->next)
298 {
299 EMACS_GET_TTY (fileno (TTY_INPUT (tty)), &buf);
300 EMACS_SET_TTY (fileno (TTY_INPUT (tty)), &buf, 0);
301 }
302 }
303 #endif /* not MSDOS */
304 #endif /* not Apollo */
305 #endif /* not VMS */
306 #endif /* not WINDOWSNT */
307 }
308
309 \f
310 #ifdef SIGTSTP
311
312 /* Arrange for character C to be read as the next input from
313 the terminal.
314 XXX What if we have multiple ttys?
315 */
316
317 void
318 stuff_char (char c)
319 {
320 if (! FRAME_TERMCAP_P (SELECTED_FRAME ()))
321 return;
322
323 /* Should perhaps error if in batch mode */
324 #ifdef TIOCSTI
325 ioctl (fileno (TTY_INPUT (CURTTY())), TIOCSTI, &c);
326 #else /* no TIOCSTI */
327 error ("Cannot stuff terminal input characters in this version of Unix");
328 #endif /* no TIOCSTI */
329 }
330
331 #endif /* SIGTSTP */
332 \f
333 void
334 init_baud_rate (int fd)
335 {
336 if (noninteractive)
337 emacs_ospeed = 0;
338 else
339 {
340 #ifdef INIT_BAUD_RATE
341 INIT_BAUD_RATE ();
342 #else
343 #ifdef DOS_NT
344 emacs_ospeed = 15;
345 #else /* not DOS_NT */
346 #ifdef VMS
347 struct sensemode sg;
348
349 SYS$QIOW (0, fd, IO$_SENSEMODE, &sg, 0, 0,
350 &sg.class, 12, 0, 0, 0, 0 );
351 emacs_ospeed = sg.xmit_baud;
352 #else /* not VMS */
353 #ifdef HAVE_TERMIOS
354 struct termios sg;
355
356 sg.c_cflag = B9600;
357 tcgetattr (fd, &sg);
358 emacs_ospeed = cfgetospeed (&sg);
359 #if defined (USE_GETOBAUD) && defined (getobaud)
360 /* m88k-motorola-sysv3 needs this (ghazi@noc.rutgers.edu) 9/1/94. */
361 if (emacs_ospeed == 0)
362 emacs_ospeed = getobaud (sg.c_cflag);
363 #endif
364 #else /* neither VMS nor TERMIOS */
365 #ifdef HAVE_TERMIO
366 struct termio sg;
367
368 sg.c_cflag = B9600;
369 #ifdef HAVE_TCATTR
370 tcgetattr (fd, &sg);
371 #else
372 ioctl (fd, TCGETA, &sg);
373 #endif
374 emacs_ospeed = sg.c_cflag & CBAUD;
375 #else /* neither VMS nor TERMIOS nor TERMIO */
376 struct sgttyb sg;
377
378 sg.sg_ospeed = B9600;
379 if (ioctl (fd, TIOCGETP, &sg) < 0)
380 abort ();
381 emacs_ospeed = sg.sg_ospeed;
382 #endif /* not HAVE_TERMIO */
383 #endif /* not HAVE_TERMIOS */
384 #endif /* not VMS */
385 #endif /* not DOS_NT */
386 #endif /* not INIT_BAUD_RATE */
387 }
388
389 baud_rate = (emacs_ospeed < sizeof baud_convert / sizeof baud_convert[0]
390 ? baud_convert[emacs_ospeed] : 9600);
391 if (baud_rate == 0)
392 baud_rate = 1200;
393 }
394
395 \f
396 /*ARGSUSED*/
397 void
398 set_exclusive_use (fd)
399 int fd;
400 {
401 #ifdef FIOCLEX
402 ioctl (fd, FIOCLEX, 0);
403 #endif
404 /* Ok to do nothing if this feature does not exist */
405 }
406 \f
407 #ifndef subprocesses
408
409 wait_without_blocking ()
410 {
411 #ifdef BSD_SYSTEM
412 wait3 (0, WNOHANG | WUNTRACED, 0);
413 #else
414 croak ("wait_without_blocking");
415 #endif
416 synch_process_alive = 0;
417 }
418
419 #endif /* not subprocesses */
420
421 int wait_debugging; /* Set nonzero to make following function work under dbx
422 (at least for bsd). */
423
424 SIGTYPE
425 wait_for_termination_signal ()
426 {}
427
428 /* Wait for subprocess with process id `pid' to terminate and
429 make sure it will get eliminated (not remain forever as a zombie) */
430
431 void
432 wait_for_termination (pid)
433 int pid;
434 {
435 while (1)
436 {
437 #ifdef subprocesses
438 #ifdef VMS
439 int status;
440
441 status = SYS$FORCEX (&pid, 0, 0);
442 break;
443 #else /* not VMS */
444 #if defined (BSD_SYSTEM) || (defined (HPUX) && !defined (HPUX_5))
445 /* Note that kill returns -1 even if the process is just a zombie now.
446 But inevitably a SIGCHLD interrupt should be generated
447 and child_sig will do wait3 and make the process go away. */
448 /* There is some indication that there is a bug involved with
449 termination of subprocesses, perhaps involving a kernel bug too,
450 but no idea what it is. Just as a hunch we signal SIGCHLD to see
451 if that causes the problem to go away or get worse. */
452 sigsetmask (sigmask (SIGCHLD));
453 if (0 > kill (pid, 0))
454 {
455 sigsetmask (SIGEMPTYMASK);
456 kill (getpid (), SIGCHLD);
457 break;
458 }
459 if (wait_debugging)
460 sleep (1);
461 else
462 sigpause (SIGEMPTYMASK);
463 #else /* not BSD_SYSTEM, and not HPUX version >= 6 */
464 #if defined (UNIPLUS)
465 if (0 > kill (pid, 0))
466 break;
467 wait (0);
468 #else /* neither BSD_SYSTEM nor UNIPLUS: random sysV */
469 #ifdef POSIX_SIGNALS /* would this work for GNU/Linux as well? */
470 sigblock (sigmask (SIGCHLD));
471 errno = 0;
472 if (kill (pid, 0) == -1 && errno == ESRCH)
473 {
474 sigunblock (sigmask (SIGCHLD));
475 break;
476 }
477
478 sigsuspend (&empty_mask);
479 #else /* not POSIX_SIGNALS */
480 #ifdef HAVE_SYSV_SIGPAUSE
481 sighold (SIGCHLD);
482 if (0 > kill (pid, 0))
483 {
484 sigrelse (SIGCHLD);
485 break;
486 }
487 sigpause (SIGCHLD);
488 #else /* not HAVE_SYSV_SIGPAUSE */
489 #ifdef WINDOWSNT
490 wait (0);
491 break;
492 #else /* not WINDOWSNT */
493 if (0 > kill (pid, 0))
494 break;
495 /* Using sleep instead of pause avoids timing error.
496 If the inferior dies just before the sleep,
497 we lose just one second. */
498 sleep (1);
499 #endif /* not WINDOWSNT */
500 #endif /* not HAVE_SYSV_SIGPAUSE */
501 #endif /* not POSIX_SIGNALS */
502 #endif /* not UNIPLUS */
503 #endif /* not BSD_SYSTEM, and not HPUX version >= 6 */
504 #endif /* not VMS */
505 #else /* not subprocesses */
506 #if __DJGPP__ > 1
507 break;
508 #else /* not __DJGPP__ > 1 */
509 #ifndef BSD4_1
510 if (kill (pid, 0) < 0)
511 break;
512 wait (0);
513 #else /* BSD4_1 */
514 int status;
515 status = wait (0);
516 if (status == pid || status == -1)
517 break;
518 #endif /* BSD4_1 */
519 #endif /* not __DJGPP__ > 1*/
520 #endif /* not subprocesses */
521 }
522 }
523
524 #ifdef subprocesses
525
526 /*
527 * flush any pending output
528 * (may flush input as well; it does not matter the way we use it)
529 */
530
531 void
532 flush_pending_output (channel)
533 int channel;
534 {
535 #ifdef HAVE_TERMIOS
536 /* If we try this, we get hit with SIGTTIN, because
537 the child's tty belongs to the child's pgrp. */
538 #else
539 #ifdef TCFLSH
540 ioctl (channel, TCFLSH, 1);
541 #else
542 #ifdef TIOCFLUSH
543 int zero = 0;
544 /* 3rd arg should be ignored
545 but some 4.2 kernels actually want the address of an int
546 and nonzero means something different. */
547 ioctl (channel, TIOCFLUSH, &zero);
548 #endif
549 #endif
550 #endif
551 }
552 \f
553 #ifndef VMS
554 /* Set up the terminal at the other end of a pseudo-terminal that
555 we will be controlling an inferior through.
556 It should not echo or do line-editing, since that is done
557 in Emacs. No padding needed for insertion into an Emacs buffer. */
558
559 void
560 child_setup_tty (out)
561 int out;
562 {
563 #ifndef DOS_NT
564 struct emacs_tty s;
565
566 EMACS_GET_TTY (out, &s);
567
568 #if defined (HAVE_TERMIO) || defined (HAVE_TERMIOS)
569 s.main.c_oflag |= OPOST; /* Enable output postprocessing */
570 s.main.c_oflag &= ~ONLCR; /* Disable map of NL to CR-NL on output */
571 #ifdef NLDLY
572 s.main.c_oflag &= ~(NLDLY|CRDLY|TABDLY|BSDLY|VTDLY|FFDLY);
573 /* No output delays */
574 #endif
575 s.main.c_lflag &= ~ECHO; /* Disable echo */
576 s.main.c_lflag |= ISIG; /* Enable signals */
577 #if 0 /* This causes bugs in (for instance) telnet to certain sites. */
578 s.main.c_iflag &= ~ICRNL; /* Disable map of CR to NL on input */
579 #ifdef INLCR /* Just being cautious, since I can't check how
580 widespread INLCR is--rms. */
581 s.main.c_iflag &= ~INLCR; /* Disable map of NL to CR on input */
582 #endif
583 #endif
584 #ifdef IUCLC
585 s.main.c_iflag &= ~IUCLC; /* Disable downcasing on input. */
586 #endif
587 #ifdef ISTRIP
588 s.main.c_iflag &= ~ISTRIP; /* don't strip 8th bit on input */
589 #endif
590 #ifdef OLCUC
591 s.main.c_oflag &= ~OLCUC; /* Disable upcasing on output. */
592 #endif
593 s.main.c_oflag &= ~TAB3; /* Disable tab expansion */
594 s.main.c_cflag = (s.main.c_cflag & ~CSIZE) | CS8; /* Don't strip 8th bit */
595 #if 0
596 /* Said to be unnecessary: */
597 s.main.c_cc[VMIN] = 1; /* minimum number of characters to accept */
598 s.main.c_cc[VTIME] = 0; /* wait forever for at least 1 character */
599 #endif
600
601 s.main.c_lflag |= ICANON; /* Enable erase/kill and eof processing */
602 s.main.c_cc[VEOF] = 04; /* insure that EOF is Control-D */
603 s.main.c_cc[VERASE] = CDISABLE; /* disable erase processing */
604 s.main.c_cc[VKILL] = CDISABLE; /* disable kill processing */
605
606 #ifdef HPUX
607 s.main.c_cflag = (s.main.c_cflag & ~CBAUD) | B9600; /* baud rate sanity */
608 #endif /* HPUX */
609
610 #ifdef AIX
611 /* AIX enhanced edit loses NULs, so disable it */
612 #ifndef IBMR2AIX
613 s.main.c_line = 0;
614 s.main.c_iflag &= ~ASCEDIT;
615 #endif
616 /* Also, PTY overloads NUL and BREAK.
617 don't ignore break, but don't signal either, so it looks like NUL. */
618 s.main.c_iflag &= ~IGNBRK;
619 s.main.c_iflag &= ~BRKINT;
620 /* QUIT and INTR work better as signals, so disable character forms */
621 s.main.c_cc[VINTR] = 0377;
622 #ifdef SIGNALS_VIA_CHARACTERS
623 /* the QUIT and INTR character are used in process_send_signal
624 so set them here to something useful. */
625 if (s.main.c_cc[VQUIT] == 0377)
626 s.main.c_cc[VQUIT] = '\\'&037; /* Control-\ */
627 if (s.main.c_cc[VINTR] == 0377)
628 s.main.c_cc[VINTR] = 'C'&037; /* Control-C */
629 #else /* no TIOCGPGRP or no TIOCGLTC or no TIOCGETC */
630 /* QUIT and INTR work better as signals, so disable character forms */
631 s.main.c_cc[VQUIT] = 0377;
632 s.main.c_cc[VINTR] = 0377;
633 s.main.c_lflag &= ~ISIG;
634 #endif /* no TIOCGPGRP or no TIOCGLTC or no TIOCGETC */
635 s.main.c_cc[VEOL] = 0377;
636 s.main.c_cflag = (s.main.c_cflag & ~CBAUD) | B9600; /* baud rate sanity */
637 #endif /* AIX */
638
639 #else /* not HAVE_TERMIO */
640
641 s.main.sg_flags &= ~(ECHO | CRMOD | ANYP | ALLDELAY | RAW | LCASE
642 | CBREAK | TANDEM);
643 s.main.sg_flags |= LPASS8;
644 s.main.sg_erase = 0377;
645 s.main.sg_kill = 0377;
646 s.lmode = LLITOUT | s.lmode; /* Don't strip 8th bit */
647
648 #endif /* not HAVE_TERMIO */
649
650 EMACS_SET_TTY (out, &s, 0);
651
652 #ifdef BSD4_1
653 if (interrupt_input)
654 reset_sigio (0);
655 #endif /* BSD4_1 */
656 #ifdef RTU
657 {
658 int zero = 0;
659 ioctl (out, FIOASYNC, &zero);
660 }
661 #endif /* RTU */
662 #endif /* not DOS_NT */
663 }
664 #endif /* not VMS */
665
666 #endif /* subprocesses */
667 \f
668 /* Record a signal code and the handler for it. */
669 struct save_signal
670 {
671 int code;
672 SIGTYPE (*handler) P_ ((int));
673 };
674
675 static void save_signal_handlers P_ ((struct save_signal *));
676 static void restore_signal_handlers P_ ((struct save_signal *));
677
678 /* Suspend the Emacs process; give terminal to its superior. */
679
680 void
681 sys_suspend ()
682 {
683 #ifdef VMS
684 /* "Foster" parentage allows emacs to return to a subprocess that attached
685 to the current emacs as a cheaper than starting a whole new process. This
686 is set up by KEPTEDITOR.COM. */
687 unsigned long parent_id, foster_parent_id;
688 char *fpid_string;
689
690 fpid_string = getenv ("EMACS_PARENT_PID");
691 if (fpid_string != NULL)
692 {
693 sscanf (fpid_string, "%x", &foster_parent_id);
694 if (foster_parent_id != 0)
695 parent_id = foster_parent_id;
696 else
697 parent_id = getppid ();
698 }
699 else
700 parent_id = getppid ();
701
702 xfree (fpid_string); /* On VMS, this was malloc'd */
703
704 if (parent_id && parent_id != 0xffffffff)
705 {
706 SIGTYPE (*oldsig)() = (int) signal (SIGINT, SIG_IGN);
707 int status = LIB$ATTACH (&parent_id) & 1;
708 signal (SIGINT, oldsig);
709 return status;
710 }
711 else
712 {
713 struct {
714 int l;
715 char *a;
716 } d_prompt;
717 d_prompt.l = sizeof ("Emacs: "); /* Our special prompt */
718 d_prompt.a = "Emacs: "; /* Just a reminder */
719 LIB$SPAWN (0, 0, 0, 0, 0, 0, 0, 0, 0, 0, &d_prompt, 0);
720 return 1;
721 }
722 return -1;
723 #else
724 #if defined (SIGTSTP) && !defined (MSDOS)
725
726 {
727 int pgrp = EMACS_GETPGRP (0);
728 EMACS_KILLPG (pgrp, SIGTSTP);
729 }
730
731 #else /* No SIGTSTP */
732 #ifdef USG_JOBCTRL /* If you don't know what this is don't mess with it */
733 ptrace (0, 0, 0, 0); /* set for ptrace - caught by csh */
734 kill (getpid (), SIGQUIT);
735
736 #else /* No SIGTSTP or USG_JOBCTRL */
737
738 /* On a system where suspending is not implemented,
739 instead fork a subshell and let it talk directly to the terminal
740 while we wait. */
741 sys_subshell ();
742
743 #endif /* no USG_JOBCTRL */
744 #endif /* no SIGTSTP */
745 #endif /* not VMS */
746 }
747
748 /* Fork a subshell. */
749
750 #ifndef MAC_OS8
751 void
752 sys_subshell ()
753 {
754 #ifndef VMS
755 #ifdef DOS_NT /* Demacs 1.1.2 91/10/20 Manabu Higashida */
756 int st;
757 char oldwd[MAXPATHLEN+1]; /* Fixed length is safe on MSDOS. */
758 #endif
759 int pid;
760 struct save_signal saved_handlers[5];
761 Lisp_Object dir;
762 unsigned char *str = 0;
763 int len;
764
765 saved_handlers[0].code = SIGINT;
766 saved_handlers[1].code = SIGQUIT;
767 saved_handlers[2].code = SIGTERM;
768 #ifdef SIGIO
769 saved_handlers[3].code = SIGIO;
770 saved_handlers[4].code = 0;
771 #else
772 saved_handlers[3].code = 0;
773 #endif
774
775 /* Mentioning current_buffer->buffer would mean including buffer.h,
776 which somehow wedges the hp compiler. So instead... */
777
778 dir = intern ("default-directory");
779 if (NILP (Fboundp (dir)))
780 goto xyzzy;
781 dir = Fsymbol_value (dir);
782 if (!STRINGP (dir))
783 goto xyzzy;
784
785 dir = expand_and_dir_to_file (Funhandled_file_name_directory (dir), Qnil);
786 str = (unsigned char *) alloca (SCHARS (dir) + 2);
787 len = SCHARS (dir);
788 bcopy (SDATA (dir), str, len);
789 if (str[len - 1] != '/') str[len++] = '/';
790 str[len] = 0;
791 xyzzy:
792
793 #ifdef DOS_NT
794 pid = 0;
795 #if __DJGPP__ > 1
796 save_signal_handlers (saved_handlers);
797 synch_process_alive = 1;
798 #endif /* __DJGPP__ > 1 */
799 #else
800 pid = vfork ();
801 if (pid == -1)
802 error ("Can't spawn subshell");
803 #endif
804
805 if (pid == 0)
806 {
807 char *sh = 0;
808
809 #ifdef DOS_NT /* MW, Aug 1993 */
810 getwd (oldwd);
811 if (sh == 0)
812 sh = (char *) egetenv ("SUSPEND"); /* KFS, 1994-12-14 */
813 #endif
814 if (sh == 0)
815 sh = (char *) egetenv ("SHELL");
816 if (sh == 0)
817 sh = "sh";
818
819 /* Use our buffer's default directory for the subshell. */
820 if (str)
821 chdir ((char *) str);
822
823 #ifdef subprocesses
824 close_process_descs (); /* Close Emacs's pipes/ptys */
825 #endif
826
827 #ifdef SET_EMACS_PRIORITY
828 {
829 extern EMACS_INT emacs_priority;
830
831 if (emacs_priority < 0)
832 nice (-emacs_priority);
833 }
834 #endif
835
836 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */
837 {
838 char *epwd = getenv ("PWD");
839 char old_pwd[MAXPATHLEN+1+4];
840
841 /* If PWD is set, pass it with corrected value. */
842 if (epwd)
843 {
844 strcpy (old_pwd, epwd);
845 if (str[len - 1] == '/')
846 str[len - 1] = '\0';
847 setenv ("PWD", str, 1);
848 }
849 st = system (sh);
850 chdir (oldwd);
851 if (epwd)
852 putenv (old_pwd); /* restore previous value */
853 }
854 #if 0 /* This is also reported if last command executed in subshell failed, KFS */
855 if (st)
856 report_file_error ("Can't execute subshell", Fcons (build_string (sh), Qnil));
857 #endif
858 #else /* not MSDOS */
859 #ifdef WINDOWSNT
860 /* Waits for process completion */
861 pid = _spawnlp (_P_WAIT, sh, sh, NULL);
862 chdir (oldwd);
863 if (pid == -1)
864 write (1, "Can't execute subshell", 22);
865 #else /* not WINDOWSNT */
866 execlp (sh, sh, 0);
867 write (1, "Can't execute subshell", 22);
868 _exit (1);
869 #endif /* not WINDOWSNT */
870 #endif /* not MSDOS */
871 }
872
873 /* Do this now if we did not do it before. */
874 #if !defined (MSDOS) || __DJGPP__ == 1
875 save_signal_handlers (saved_handlers);
876 synch_process_alive = 1;
877 #endif
878
879 #ifndef DOS_NT
880 wait_for_termination (pid);
881 #endif
882 restore_signal_handlers (saved_handlers);
883 synch_process_alive = 0;
884 #endif /* !VMS */
885 }
886 #endif /* !MAC_OS8 */
887
888 static void
889 save_signal_handlers (saved_handlers)
890 struct save_signal *saved_handlers;
891 {
892 while (saved_handlers->code)
893 {
894 saved_handlers->handler
895 = (SIGTYPE (*) P_ ((int))) signal (saved_handlers->code, SIG_IGN);
896 saved_handlers++;
897 }
898 }
899
900 static void
901 restore_signal_handlers (saved_handlers)
902 struct save_signal *saved_handlers;
903 {
904 while (saved_handlers->code)
905 {
906 signal (saved_handlers->code, saved_handlers->handler);
907 saved_handlers++;
908 }
909 }
910 \f
911 #ifndef SIGIO
912 /* If SIGIO is broken, don't do anything. */
913 void
914 init_sigio (int fd)
915 {
916 }
917
918 void
919 reset_sigio (int fd)
920 {
921 }
922
923 void
924 request_sigio (void)
925 {
926 }
927
928 void
929 unrequest_sigio (void)
930 {
931 }
932
933 #else
934 #ifdef F_SETFL
935
936 int old_fcntl_flags[MAXDESC];
937
938 void
939 init_sigio (fd)
940 int fd;
941 {
942 #ifdef FASYNC
943 old_fcntl_flags[fd] = fcntl (fd, F_GETFL, 0) & ~FASYNC;
944 fcntl (fd, F_SETFL, old_fcntl_flags[fd] | FASYNC);
945 #endif
946 interrupts_deferred = 0;
947 }
948
949 void
950 reset_sigio (fd)
951 int fd;
952 {
953 #ifdef FASYNC
954 fcntl (fd, F_SETFL, old_fcntl_flags[fd]);
955 #endif
956 }
957
958 #ifdef FASYNC /* F_SETFL does not imply existence of FASYNC */
959 /* XXX Uhm, FASYNC is not used anymore here. */
960
961 void
962 request_sigio ()
963 {
964 /* XXX read_socket_hook is not global anymore. Is blocking SIGIO
965 bad under X? */
966 #if 0
967 if (read_socket_hook)
968 return;
969 #endif
970
971 #ifdef SIGWINCH
972 sigunblock (sigmask (SIGWINCH));
973 #endif
974 sigunblock (sigmask (SIGIO));
975
976 interrupts_deferred = 0;
977 }
978
979 void
980 unrequest_sigio (void)
981 {
982 /* XXX read_socket_hook is not global anymore. Is blocking SIGIO
983 bad under X? */
984 #if 0
985 if (read_socket_hook)
986 return;
987 #endif
988
989 #ifdef SIGWINCH
990 sigblock (sigmask (SIGWINCH));
991 #endif
992 sigblock (sigmask (SIGIO));
993 interrupts_deferred = 1;
994 }
995
996 #else /* no FASYNC */
997 #ifdef STRIDE /* Stride doesn't have FASYNC - use FIOASYNC */
998
999 void
1000 request_sigio ()
1001 {
1002 int on = 1;
1003
1004 if (read_socket_hook)
1005 return;
1006
1007 /* XXX CURTTY() is bogus here. */
1008 ioctl (fileno (TTY_INPUT (CURTTY ())), FIOASYNC, &on);
1009 interrupts_deferred = 0;
1010 }
1011
1012 void
1013 unrequest_sigio ()
1014 {
1015 int off = 0;
1016
1017 if (read_socket_hook)
1018 return;
1019
1020 /* XXX CURTTY() is bogus here. */
1021 ioctl (fileno (TTY_INPUT (CURTTY ())), FIOASYNC, &off);
1022 interrupts_deferred = 1;
1023 }
1024
1025 #else /* not FASYNC, not STRIDE */
1026
1027 #ifdef _CX_UX
1028
1029 #include <termios.h>
1030
1031 void
1032 request_sigio ()
1033 {
1034 int on = 1;
1035 sigset_t st;
1036
1037 if (read_socket_hook)
1038 return;
1039
1040 sigemptyset (&st);
1041 sigaddset (&st, SIGIO);
1042 ioctl (0, FIOASYNC, &on); /* XXX This fails for multiple ttys. */
1043 interrupts_deferred = 0;
1044 sigprocmask (SIG_UNBLOCK, &st, (sigset_t *)0);
1045 }
1046
1047 void
1048 unrequest_sigio ()
1049 {
1050 int off = 0;
1051
1052 if (read_socket_hook)
1053 return;
1054
1055 ioctl (0, FIOASYNC, &off); /* XXX This fails for multiple ttys. */
1056 interrupts_deferred = 1;
1057 }
1058
1059 #else /* ! _CX_UX */
1060 #ifndef MSDOS
1061
1062 void
1063 request_sigio ()
1064 {
1065 if (read_socket_hook)
1066 return;
1067
1068 croak ("request_sigio");
1069 }
1070
1071 void
1072 unrequest_sigio ()
1073 {
1074 if (read_socket_hook)
1075 return;
1076
1077 croak ("unrequest_sigio");
1078 }
1079
1080 #endif /* MSDOS */
1081 #endif /* _CX_UX */
1082 #endif /* STRIDE */
1083 #endif /* FASYNC */
1084 #endif /* F_SETFL */
1085 #endif /* SIGIO */
1086 \f
1087 /* Saving and restoring the process group of Emacs's terminal. */
1088
1089 #ifdef BSD_PGRPS
1090
1091 /* The process group of which Emacs was a member when it initially
1092 started.
1093
1094 If Emacs was in its own process group (i.e. inherited_pgroup ==
1095 getpid ()), then we know we're running under a shell with job
1096 control (Emacs would never be run as part of a pipeline).
1097 Everything is fine.
1098
1099 If Emacs was not in its own process group, then we know we're
1100 running under a shell (or a caller) that doesn't know how to
1101 separate itself from Emacs (like sh). Emacs must be in its own
1102 process group in order to receive SIGIO correctly. In this
1103 situation, we put ourselves in our own pgroup, forcibly set the
1104 tty's pgroup to our pgroup, and make sure to restore and reinstate
1105 the tty's pgroup just like any other terminal setting. If
1106 inherited_group was not the tty's pgroup, then we'll get a
1107 SIGTTmumble when we try to change the tty's pgroup, and a CONT if
1108 it goes foreground in the future, which is what should happen. */
1109 int inherited_pgroup;
1110
1111 /* Split off the foreground process group to Emacs alone.
1112 When we are in the foreground, but not started in our own process
1113 group, redirect the TTY to point to our own process group. We need
1114 to be in our own process group to receive SIGIO properly. */
1115 void
1116 narrow_foreground_group (int fd)
1117 {
1118 int me = getpid ();
1119
1120 if (! inherited_pgroup)
1121 inherited_pgroup = getpgid (0);
1122 /* XXX This only works on the controlling tty. */
1123 if (inherited_pgroup != me)
1124 EMACS_SET_TTY_PGRP (fd, &me);
1125 setpgid (0, me);
1126 }
1127
1128 /* Set the tty to our original foreground group. */
1129 void
1130 widen_foreground_group (int fd)
1131 {
1132 if (inherited_pgroup != getpid ())
1133 EMACS_SET_TTY_PGRP (fd, &inherited_pgroup);
1134 setpgid (0, inherited_pgroup);
1135 }
1136
1137 #endif /* BSD_PGRPS */
1138 \f
1139 /* Getting and setting emacs_tty structures. */
1140
1141 /* Set *TC to the parameters associated with the terminal FD.
1142 Return zero if all's well, or -1 if we ran into an error we
1143 couldn't deal with. */
1144 int
1145 emacs_get_tty (fd, settings)
1146 int fd;
1147 struct emacs_tty *settings;
1148 {
1149 /* Retrieve the primary parameters - baud rate, character size, etcetera. */
1150 #ifdef HAVE_TCATTR
1151 /* We have those nifty POSIX tcmumbleattr functions. */
1152 bzero (&settings->main, sizeof (settings->main));
1153 if (tcgetattr (fd, &settings->main) < 0)
1154 return -1;
1155
1156 #else
1157 #ifdef HAVE_TERMIO
1158 /* The SYSV-style interface? */
1159 if (ioctl (fd, TCGETA, &settings->main) < 0)
1160 return -1;
1161
1162 #else
1163 #ifdef VMS
1164 /* Vehemently Monstrous System? :-) */
1165 if (! (SYS$QIOW (0, fd, IO$_SENSEMODE, settings, 0, 0,
1166 &settings->main.class, 12, 0, 0, 0, 0)
1167 & 1))
1168 return -1;
1169
1170 #else
1171 #ifndef DOS_NT
1172 /* I give up - I hope you have the BSD ioctls. */
1173 if (ioctl (fd, TIOCGETP, &settings->main) < 0)
1174 return -1;
1175 #endif /* not DOS_NT */
1176 #endif
1177 #endif
1178 #endif
1179
1180 /* Suivant - Do we have to get struct ltchars data? */
1181 #ifdef HAVE_LTCHARS
1182 if (ioctl (fd, TIOCGLTC, &settings->ltchars) < 0)
1183 return -1;
1184 #endif
1185
1186 /* How about a struct tchars and a wordful of lmode bits? */
1187 #ifdef HAVE_TCHARS
1188 if (ioctl (fd, TIOCGETC, &settings->tchars) < 0
1189 || ioctl (fd, TIOCLGET, &settings->lmode) < 0)
1190 return -1;
1191 #endif
1192
1193 /* We have survived the tempest. */
1194 return 0;
1195 }
1196
1197
1198 /* Set the parameters of the tty on FD according to the contents of
1199 *SETTINGS. If FLUSHP is non-zero, we discard input.
1200 Return 0 if all went well, and -1 if anything failed. */
1201
1202 int
1203 emacs_set_tty (fd, settings, flushp)
1204 int fd;
1205 struct emacs_tty *settings;
1206 int flushp;
1207 {
1208 /* Set the primary parameters - baud rate, character size, etcetera. */
1209 #ifdef HAVE_TCATTR
1210 int i;
1211 /* We have those nifty POSIX tcmumbleattr functions.
1212 William J. Smith <wjs@wiis.wang.com> writes:
1213 "POSIX 1003.1 defines tcsetattr to return success if it was
1214 able to perform any of the requested actions, even if some
1215 of the requested actions could not be performed.
1216 We must read settings back to ensure tty setup properly.
1217 AIX requires this to keep tty from hanging occasionally." */
1218 /* This make sure that we don't loop indefinitely in here. */
1219 for (i = 0 ; i < 10 ; i++)
1220 if (tcsetattr (fd, flushp ? TCSAFLUSH : TCSADRAIN, &settings->main) < 0)
1221 {
1222 if (errno == EINTR)
1223 continue;
1224 else
1225 return -1;
1226 }
1227 else
1228 {
1229 struct termios new;
1230
1231 bzero (&new, sizeof (new));
1232 /* Get the current settings, and see if they're what we asked for. */
1233 tcgetattr (fd, &new);
1234 /* We cannot use memcmp on the whole structure here because under
1235 * aix386 the termios structure has some reserved field that may
1236 * not be filled in.
1237 */
1238 if ( new.c_iflag == settings->main.c_iflag
1239 && new.c_oflag == settings->main.c_oflag
1240 && new.c_cflag == settings->main.c_cflag
1241 && new.c_lflag == settings->main.c_lflag
1242 && memcmp (new.c_cc, settings->main.c_cc, NCCS) == 0)
1243 break;
1244 else
1245 continue;
1246 }
1247
1248 #else
1249 #ifdef HAVE_TERMIO
1250 /* The SYSV-style interface? */
1251 if (ioctl (fd, flushp ? TCSETAF : TCSETAW, &settings->main) < 0)
1252 return -1;
1253
1254 #else
1255 #ifdef VMS
1256 /* Vehemently Monstrous System? :-) */
1257 if (! (SYS$QIOW (0, fd, IO$_SETMODE, &input_iosb, 0, 0,
1258 &settings->main.class, 12, 0, 0, 0, 0)
1259 & 1))
1260 return -1;
1261
1262 #else
1263 #ifndef DOS_NT
1264 /* I give up - I hope you have the BSD ioctls. */
1265 if (ioctl (fd, (flushp) ? TIOCSETP : TIOCSETN, &settings->main) < 0)
1266 return -1;
1267 #endif /* not DOS_NT */
1268
1269 #endif
1270 #endif
1271 #endif
1272
1273 /* Suivant - Do we have to get struct ltchars data? */
1274 #ifdef HAVE_LTCHARS
1275 if (ioctl (fd, TIOCSLTC, &settings->ltchars) < 0)
1276 return -1;
1277 #endif
1278
1279 /* How about a struct tchars and a wordful of lmode bits? */
1280 #ifdef HAVE_TCHARS
1281 if (ioctl (fd, TIOCSETC, &settings->tchars) < 0
1282 || ioctl (fd, TIOCLSET, &settings->lmode) < 0)
1283 return -1;
1284 #endif
1285
1286 /* We have survived the tempest. */
1287 return 0;
1288 }
1289
1290 \f
1291
1292 #ifdef BSD4_1
1293 /* BSD 4.1 needs to keep track of the lmode bits in order to start
1294 sigio. */
1295 int lmode;
1296 #endif
1297
1298 #ifndef F_SETOWN_BUG
1299 #ifdef F_SETOWN
1300 int old_fcntl_owner[MAXDESC];
1301 #endif /* F_SETOWN */
1302 #endif /* F_SETOWN_BUG */
1303
1304 /* This may also be defined in stdio,
1305 but if so, this does no harm,
1306 and using the same name avoids wasting the other one's space. */
1307
1308 #ifdef nec_ews_svr4
1309 extern char *_sobuf ;
1310 #else
1311 #if defined (USG) || defined (DGUX)
1312 unsigned char _sobuf[BUFSIZ+8];
1313 #else
1314 char _sobuf[BUFSIZ];
1315 #endif
1316 #endif
1317
1318 #ifdef HAVE_LTCHARS
1319 static struct ltchars new_ltchars = {-1,-1,-1,-1,-1,-1};
1320 #endif
1321 #ifdef HAVE_TCHARS
1322 static struct tchars new_tchars = {-1,-1,-1,-1,-1,-1};
1323 #endif
1324
1325 void
1326 init_all_sys_modes (void)
1327 {
1328 struct tty_display_info *tty;
1329 for (tty = tty_list; tty; tty = tty->next)
1330 init_sys_modes (tty);
1331 }
1332
1333 void
1334 init_sys_modes (tty_out)
1335 struct tty_display_info *tty_out;
1336 {
1337 struct emacs_tty tty;
1338
1339 #ifdef MAC_OS8
1340 /* cus-start.el complains if delete-exited-processes is not defined */
1341 #ifndef subprocesses
1342 DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes,
1343 doc: /* *Non-nil means delete processes immediately when they exit.
1344 nil means don't delete them until `list-processes' is run. */);
1345 delete_exited_processes = 0;
1346 #endif
1347 #endif /* MAC_OS8 */
1348
1349 #ifdef VMS
1350 #if 0
1351 static int oob_chars[2] = {0, 1 << 7}; /* catch C-g's */
1352 extern int (*interrupt_signal) ();
1353 #endif
1354 #endif
1355
1356 Vtty_erase_char = Qnil;
1357
1358 if (noninteractive)
1359 return;
1360
1361 #ifdef VMS
1362 if (!input_ef)
1363 input_ef = get_kbd_event_flag ();
1364 /* LIB$GET_EF (&input_ef); */
1365 SYS$CLREF (input_ef);
1366 waiting_for_ast = 0;
1367 if (!timer_ef)
1368 timer_ef = get_timer_event_flag ();
1369 /* LIB$GET_EF (&timer_ef); */
1370 SYS$CLREF (timer_ef);
1371 #if 0
1372 if (!process_ef)
1373 {
1374 LIB$GET_EF (&process_ef);
1375 SYS$CLREF (process_ef);
1376 }
1377 if (input_ef / 32 != process_ef / 32)
1378 croak ("Input and process event flags in different clusters.");
1379 #endif
1380 if (input_ef / 32 != timer_ef / 32)
1381 croak ("Input and timer event flags in different clusters.");
1382 #if 0
1383 input_eflist = ((unsigned) 1 << (input_ef % 32)) |
1384 ((unsigned) 1 << (process_ef % 32));
1385 #endif
1386 timer_eflist = ((unsigned) 1 << (input_ef % 32)) |
1387 ((unsigned) 1 << (timer_ef % 32));
1388 #ifndef VMS4_4
1389 sys_access_reinit ();
1390 #endif
1391 #endif /* VMS */
1392
1393 #ifdef BSD_PGRPS
1394 #if 0
1395 /* read_socket_hook is not global anymore. I think doing this
1396 unconditionally will not cause any problems. */
1397 if (! read_socket_hook && EQ (Vwindow_system, Qnil))
1398 #endif
1399 narrow_foreground_group (fileno (TTY_INPUT (tty_out)));
1400 #endif
1401
1402 #ifdef HAVE_WINDOW_SYSTEM
1403 /* Emacs' window system on MSDOG uses the `internal terminal' and therefore
1404 needs the initialization code below. */
1405 if (tty_out->input != stdin || EQ (Vwindow_system, Qnil))
1406 #endif
1407 {
1408 if (! tty_out->old_tty)
1409 tty_out->old_tty = (struct emacs_tty *) xmalloc (sizeof (struct emacs_tty));
1410
1411 EMACS_GET_TTY (fileno (TTY_INPUT (tty_out)), tty_out->old_tty);
1412
1413 tty = *tty_out->old_tty;
1414
1415 #if defined (HAVE_TERMIO) || defined (HAVE_TERMIOS)
1416 XSETINT (Vtty_erase_char, tty.main.c_cc[VERASE]);
1417
1418 #ifdef DGUX
1419 /* This allows meta to be sent on 8th bit. */
1420 tty.main.c_iflag &= ~INPCK; /* don't check input for parity */
1421 #endif
1422 tty.main.c_iflag |= (IGNBRK); /* Ignore break condition */
1423 tty.main.c_iflag &= ~ICRNL; /* Disable map of CR to NL on input */
1424 #ifdef INLCR /* I'm just being cautious,
1425 since I can't check how widespread INLCR is--rms. */
1426 tty.main.c_iflag &= ~INLCR; /* Disable map of NL to CR on input */
1427 #endif
1428 #ifdef ISTRIP
1429 tty.main.c_iflag &= ~ISTRIP; /* don't strip 8th bit on input */
1430 #endif
1431 tty.main.c_lflag &= ~ECHO; /* Disable echo */
1432 tty.main.c_lflag &= ~ICANON; /* Disable erase/kill processing */
1433 #ifdef IEXTEN
1434 tty.main.c_lflag &= ~IEXTEN; /* Disable other editing characters. */
1435 #endif
1436 tty.main.c_lflag |= ISIG; /* Enable signals */
1437 if (tty_out->flow_control)
1438 {
1439 tty.main.c_iflag |= IXON; /* Enable start/stop output control */
1440 #ifdef IXANY
1441 tty.main.c_iflag &= ~IXANY;
1442 #endif /* IXANY */
1443 }
1444 else
1445 tty.main.c_iflag &= ~IXON; /* Disable start/stop output control */
1446 tty.main.c_oflag &= ~ONLCR; /* Disable map of NL to CR-NL
1447 on output */
1448 tty.main.c_oflag &= ~TAB3; /* Disable tab expansion */
1449 #ifdef CS8
1450 if (tty_out->meta_key)
1451 {
1452 tty.main.c_cflag |= CS8; /* allow 8th bit on input */
1453 tty.main.c_cflag &= ~PARENB;/* Don't check parity */
1454 }
1455 #endif
1456 if (tty_out->input == stdin)
1457 {
1458 tty.main.c_cc[VINTR] = quit_char; /* C-g (usually) gives SIGINT */
1459 /* Set up C-g for both SIGQUIT and SIGINT.
1460 We don't know which we will get, but we handle both alike
1461 so which one it really gives us does not matter. */
1462 tty.main.c_cc[VQUIT] = quit_char;
1463 }
1464 else
1465 {
1466 /* We normally don't get interrupt or quit signals from tty
1467 devices other than our controlling terminal; therefore,
1468 we must handle C-g as normal input. Unfortunately, this
1469 means that the interrupt and quit feature must be
1470 disabled on secondary ttys, or we would not even see the
1471 keypress.
1472
1473 Note that even though emacsclient could have special code
1474 to pass SIGINT to Emacs, we should _not_ enable
1475 interrupt/quit keys for emacsclient frames. This means
1476 that we can't break out of loops in C code from a
1477 secondary tty frame, but we can always decide what
1478 display the C-g came from, which is more important from a
1479 usability point of view. (Consider the case when two
1480 people work together using the same Emacs instance.) */
1481 tty.main.c_cc[VINTR] = CDISABLE;
1482 tty.main.c_cc[VQUIT] = CDISABLE;
1483 }
1484 tty.main.c_cc[VMIN] = 1; /* Input should wait for at least 1 char */
1485 tty.main.c_cc[VTIME] = 0; /* no matter how long that takes. */
1486 #ifdef VSWTCH
1487 tty.main.c_cc[VSWTCH] = CDISABLE; /* Turn off shell layering use
1488 of C-z */
1489 #endif /* VSWTCH */
1490
1491 #if defined (mips) || defined (HAVE_TCATTR)
1492 #ifdef VSUSP
1493 tty.main.c_cc[VSUSP] = CDISABLE; /* Turn off mips handling of C-z. */
1494 #endif /* VSUSP */
1495 #ifdef V_DSUSP
1496 tty.main.c_cc[V_DSUSP] = CDISABLE; /* Turn off mips handling of C-y. */
1497 #endif /* V_DSUSP */
1498 #ifdef VDSUSP /* Some systems have VDSUSP, some have V_DSUSP. */
1499 tty.main.c_cc[VDSUSP] = CDISABLE;
1500 #endif /* VDSUSP */
1501 #ifdef VLNEXT
1502 tty.main.c_cc[VLNEXT] = CDISABLE;
1503 #endif /* VLNEXT */
1504 #ifdef VREPRINT
1505 tty.main.c_cc[VREPRINT] = CDISABLE;
1506 #endif /* VREPRINT */
1507 #ifdef VWERASE
1508 tty.main.c_cc[VWERASE] = CDISABLE;
1509 #endif /* VWERASE */
1510 #ifdef VDISCARD
1511 tty.main.c_cc[VDISCARD] = CDISABLE;
1512 #endif /* VDISCARD */
1513
1514 if (tty_out->flow_control)
1515 {
1516 #ifdef VSTART
1517 tty.main.c_cc[VSTART] = '\021';
1518 #endif /* VSTART */
1519 #ifdef VSTOP
1520 tty.main.c_cc[VSTOP] = '\023';
1521 #endif /* VSTOP */
1522 }
1523 else
1524 {
1525 #ifdef VSTART
1526 tty.main.c_cc[VSTART] = CDISABLE;
1527 #endif /* VSTART */
1528 #ifdef VSTOP
1529 tty.main.c_cc[VSTOP] = CDISABLE;
1530 #endif /* VSTOP */
1531 }
1532 #endif /* mips or HAVE_TCATTR */
1533
1534 #ifdef SET_LINE_DISCIPLINE
1535 /* Need to explicitly request TERMIODISC line discipline or
1536 Ultrix's termios does not work correctly. */
1537 tty.main.c_line = SET_LINE_DISCIPLINE;
1538 #endif
1539 #ifdef AIX
1540 #ifndef IBMR2AIX
1541 /* AIX enhanced edit loses NULs, so disable it. */
1542 tty.main.c_line = 0;
1543 tty.main.c_iflag &= ~ASCEDIT;
1544 #else
1545 tty.main.c_cc[VSTRT] = 255;
1546 tty.main.c_cc[VSTOP] = 255;
1547 tty.main.c_cc[VSUSP] = 255;
1548 tty.main.c_cc[VDSUSP] = 255;
1549 #endif /* IBMR2AIX */
1550 if (tty_out->flow_control)
1551 {
1552 #ifdef VSTART
1553 tty.main.c_cc[VSTART] = '\021';
1554 #endif /* VSTART */
1555 #ifdef VSTOP
1556 tty.main.c_cc[VSTOP] = '\023';
1557 #endif /* VSTOP */
1558 }
1559 /* Also, PTY overloads NUL and BREAK.
1560 don't ignore break, but don't signal either, so it looks like NUL.
1561 This really serves a purpose only if running in an XTERM window
1562 or via TELNET or the like, but does no harm elsewhere. */
1563 tty.main.c_iflag &= ~IGNBRK;
1564 tty.main.c_iflag &= ~BRKINT;
1565 #endif
1566 #else /* if not HAVE_TERMIO */
1567 #ifdef VMS
1568 tty.main.tt_char |= TT$M_NOECHO;
1569 if (meta_key)
1570 tty.main.tt_char |= TT$M_EIGHTBIT;
1571 if (tty_out->flow_control)
1572 tty.main.tt_char |= TT$M_TTSYNC;
1573 else
1574 tty.main.tt_char &= ~TT$M_TTSYNC;
1575 tty.main.tt2_char |= TT2$M_PASTHRU | TT2$M_XON;
1576 #else /* not VMS (BSD, that is) */
1577 #ifndef DOS_NT
1578 XSETINT (Vtty_erase_char, tty.main.sg_erase);
1579 tty.main.sg_flags &= ~(ECHO | CRMOD | XTABS);
1580 if (meta_key)
1581 tty.main.sg_flags |= ANYP;
1582 tty.main.sg_flags |= interrupt_input ? RAW : CBREAK;
1583 #endif /* not DOS_NT */
1584 #endif /* not VMS (BSD, that is) */
1585 #endif /* not HAVE_TERMIO */
1586
1587 /* If going to use CBREAK mode, we must request C-g to interrupt
1588 and turn off start and stop chars, etc. If not going to use
1589 CBREAK mode, do this anyway so as to turn off local flow
1590 control for user coming over network on 4.2; in this case,
1591 only t_stopc and t_startc really matter. */
1592 #ifndef HAVE_TERMIO
1593 #ifdef HAVE_TCHARS
1594 /* Note: if not using CBREAK mode, it makes no difference how we
1595 set this */
1596 tty.tchars = new_tchars;
1597 tty.tchars.t_intrc = quit_char;
1598 if (tty_out->flow_control)
1599 {
1600 tty.tchars.t_startc = '\021';
1601 tty.tchars.t_stopc = '\023';
1602 }
1603
1604 tty.lmode = LDECCTQ | LLITOUT | LPASS8 | LNOFLSH | tty_out->old_tty.lmode;
1605 #ifdef ultrix
1606 /* Under Ultrix 4.2a, leaving this out doesn't seem to hurt
1607 anything, and leaving it in breaks the meta key. Go figure. */
1608 tty.lmode &= ~LLITOUT;
1609 #endif
1610
1611 #ifdef BSD4_1
1612 lmode = tty.lmode;
1613 #endif
1614
1615 #endif /* HAVE_TCHARS */
1616 #endif /* not HAVE_TERMIO */
1617
1618 #ifdef HAVE_LTCHARS
1619 tty.ltchars = new_ltchars;
1620 #endif /* HAVE_LTCHARS */
1621 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida, MW Aug 1993 */
1622 if (!tty_out->term_initted)
1623 internal_terminal_init ();
1624 dos_ttraw ();
1625 #endif
1626
1627 EMACS_SET_TTY (fileno (TTY_INPUT (tty_out)), &tty, 0);
1628
1629 /* This code added to insure that, if flow-control is not to be used,
1630 we have an unlocked terminal at the start. */
1631
1632 #ifdef TCXONC
1633 if (!tty_out->flow_control) ioctl (fileno (TTY_INPUT (tty_out)), TCXONC, 1);
1634 #endif
1635 #ifndef APOLLO
1636 #ifdef TIOCSTART
1637 if (!tty_out->flow_control) ioctl (fileno (TTY_INPUT (tty_out)), TIOCSTART, 0);
1638 #endif
1639 #endif
1640
1641 #if defined (HAVE_TERMIOS) || defined (HPUX9)
1642 #ifdef TCOON
1643 if (!tty_out->flow_control) tcflow (fileno (TTY_INPUT (tty_out)), TCOON);
1644 #endif
1645 #endif
1646
1647 #ifdef AIXHFT
1648 hft_init (tty_out);
1649 #ifdef IBMR2AIX
1650 {
1651 /* IBM's HFT device usually thinks a ^J should be LF/CR. We need it
1652 to be only LF. This is the way that is done. */
1653 struct termio tty;
1654
1655 if (ioctl (1, HFTGETID, &tty) != -1)
1656 write (1, "\033[20l", 5);
1657 }
1658 #endif
1659 #endif /* AIXHFT */
1660
1661 #ifdef VMS
1662 /* Appears to do nothing when in PASTHRU mode.
1663 SYS$QIOW (0, fileno (TTY_INPUT (tty_out)), IO$_SETMODE|IO$M_OUTBAND, 0, 0, 0,
1664 interrupt_signal, oob_chars, 0, 0, 0, 0);
1665 */
1666 queue_kbd_input (0);
1667 #endif /* VMS */
1668 }
1669
1670 #ifdef F_SETFL
1671 #ifndef F_SETOWN_BUG
1672 #ifdef F_GETOWN /* F_SETFL does not imply existence of F_GETOWN */
1673 if (interrupt_input
1674 && (tty_out->input != stdin || EQ (Vwindow_system, Qnil)))
1675 {
1676 old_fcntl_owner[fileno (TTY_INPUT (tty_out))] =
1677 fcntl (fileno (TTY_INPUT (tty_out)), F_GETOWN, 0);
1678 fcntl (fileno (TTY_INPUT (tty_out)), F_SETOWN, getpid ());
1679 init_sigio (fileno (TTY_INPUT (tty_out)));
1680 }
1681 #endif /* F_GETOWN */
1682 #endif /* F_SETOWN_BUG */
1683 #endif /* F_SETFL */
1684
1685 #ifdef BSD4_1
1686 if (interrupt_input)
1687 init_sigio (fileno (TTY_INPUT (tty_out)));
1688 #endif
1689
1690 #ifdef VMS /* VMS sometimes has this symbol but lacks setvbuf. */
1691 #undef _IOFBF
1692 #endif
1693 #ifdef _IOFBF
1694 /* This symbol is defined on recent USG systems.
1695 Someone says without this call USG won't really buffer the file
1696 even with a call to setbuf. */
1697 setvbuf (TTY_OUTPUT (tty_out), (char *) _sobuf, _IOFBF, sizeof _sobuf);
1698 #else
1699 setbuf (TTY_OUTPUT (tty_out), (char *) _sobuf);
1700 #endif
1701
1702 #if 0 /* We always need this with multi-tty support. */
1703 #ifdef HAVE_WINDOW_SYSTEM
1704 /* Emacs' window system on MSDOG uses the `internal terminal' and therefore
1705 needs the initialization code below. */
1706 if (EQ (Vwindow_system, Qnil)
1707 #ifndef WINDOWSNT
1708 /* When running in tty mode on NT/Win95, we have a read_socket
1709 hook, but still need the rest of the initialization code below. */
1710 && (! read_socket_hook)
1711 #endif
1712 )
1713 #endif
1714 #endif
1715 tty_set_terminal_modes (tty_out->display);
1716
1717 if (!tty_out->term_initted)
1718 {
1719 Lisp_Object tail, frame;
1720 FOR_EACH_FRAME (tail, frame)
1721 {
1722 /* XXX This needs to be revised. */
1723 if (FRAME_TERMCAP_P (XFRAME (frame))
1724 && FRAME_TTY (XFRAME (frame)) == tty_out)
1725 init_frame_faces (XFRAME (frame));
1726 }
1727 }
1728
1729 if (tty_out->term_initted && no_redraw_on_reenter)
1730 {
1731 if (display_completed)
1732 direct_output_forward_char (0);
1733 }
1734 else
1735 {
1736 Lisp_Object tail, frame;
1737 frame_garbaged = 1;
1738 FOR_EACH_FRAME (tail, frame)
1739 {
1740 if (FRAME_TERMCAP_P (XFRAME (frame))
1741 && FRAME_TTY (XFRAME (frame)) == tty_out)
1742 FRAME_GARBAGED_P (XFRAME (frame)) = 1;
1743 }
1744 }
1745
1746 tty_out->term_initted = 1;
1747 }
1748
1749 /* Return nonzero if safe to use tabs in output.
1750 At the time this is called, init_sys_modes has not been done yet. */
1751
1752 int
1753 tabs_safe_p (int fd)
1754 {
1755 struct emacs_tty etty;
1756
1757 EMACS_GET_TTY (fd, &etty);
1758 return EMACS_TTY_TABS_OK (&etty);
1759 }
1760 \f
1761 /* Get terminal size from system.
1762 Store number of lines into *HEIGHTP and width into *WIDTHP.
1763 We store 0 if there's no valid information. */
1764
1765 void
1766 get_tty_size (int fd, int *widthp, int *heightp)
1767 {
1768
1769 #ifdef TIOCGWINSZ
1770
1771 /* BSD-style. */
1772 struct winsize size;
1773
1774 if (ioctl (fd, TIOCGWINSZ, &size) == -1)
1775 *widthp = *heightp = 0;
1776 else
1777 {
1778 *widthp = size.ws_col;
1779 *heightp = size.ws_row;
1780 }
1781
1782 #else
1783 #ifdef TIOCGSIZE
1784
1785 /* SunOS - style. */
1786 struct ttysize size;
1787
1788 if (ioctl (fd, TIOCGSIZE, &size) == -1)
1789 *widthp = *heightp = 0;
1790 else
1791 {
1792 *widthp = size.ts_cols;
1793 *heightp = size.ts_lines;
1794 }
1795
1796 #else
1797 #ifdef VMS
1798
1799 struct sensemode tty;
1800
1801 SYS$QIOW (0, fd, IO$_SENSEMODE, &tty, 0, 0,
1802 &tty.class, 12, 0, 0, 0, 0);
1803 *widthp = tty.scr_wid;
1804 *heightp = tty.scr_len;
1805
1806 #else
1807 #ifdef MSDOS
1808 *widthp = ScreenCols ();
1809 *heightp = ScreenRows ();
1810 #else /* system doesn't know size */
1811 *widthp = 0;
1812 *heightp = 0;
1813 #endif
1814 #endif /* not VMS */
1815 #endif /* not SunOS-style */
1816 #endif /* not BSD-style */
1817 }
1818
1819 /* Set the logical window size associated with descriptor FD
1820 to HEIGHT and WIDTH. This is used mainly with ptys. */
1821
1822 int
1823 set_window_size (fd, height, width)
1824 int fd, height, width;
1825 {
1826 #ifdef TIOCSWINSZ
1827
1828 /* BSD-style. */
1829 struct winsize size;
1830 size.ws_row = height;
1831 size.ws_col = width;
1832
1833 if (ioctl (fd, TIOCSWINSZ, &size) == -1)
1834 return 0; /* error */
1835 else
1836 return 1;
1837
1838 #else
1839 #ifdef TIOCSSIZE
1840
1841 /* SunOS - style. */
1842 struct ttysize size;
1843 size.ts_lines = height;
1844 size.ts_cols = width;
1845
1846 if (ioctl (fd, TIOCGSIZE, &size) == -1)
1847 return 0;
1848 else
1849 return 1;
1850 #else
1851 return -1;
1852 #endif /* not SunOS-style */
1853 #endif /* not BSD-style */
1854 }
1855
1856 \f
1857 void
1858 reset_all_sys_modes (void)
1859 {
1860 struct tty_display_info *tty;
1861 for (tty = tty_list; tty; tty = tty->next)
1862 reset_sys_modes (tty);
1863 }
1864
1865 /* Prepare the terminal for closing it; move the cursor to the
1866 bottom of the frame, turn off interrupt-driven I/O, etc. */
1867 void
1868 reset_sys_modes (tty_out)
1869 struct tty_display_info *tty_out;
1870 {
1871 if (noninteractive)
1872 {
1873 fflush (stdout);
1874 return;
1875 }
1876 if (!tty_out->term_initted)
1877 return;
1878 #if 0 /* We always need to do this with multi-tty support. */
1879 #ifdef HAVE_WINDOW_SYSTEM
1880 /* Emacs' window system on MSDOG uses the `internal terminal' and therefore
1881 needs the clean-up code below. */
1882 if (tty_out->input != stdin
1883 || (!EQ (Vwindow_system, Qnil)
1884 #ifndef WINDOWSNT
1885 /* When running in tty mode on NT/Win95, we have a read_socket
1886 hook, but still need the rest of the clean-up code below. */
1887 || read_socket_hook
1888 #endif
1889 ))
1890 return;
1891 #endif
1892 #endif
1893
1894 cmgoto (tty_out, FrameRows (tty_out) - 1, 0);
1895 #if 0 /* XXX This doesn't work anymore, the signature has changed. */
1896 tty_clear_end_of_line (tty_out, FrameCols (tty_out));
1897 #endif
1898 cmgoto (tty_out, FrameRows (tty_out) - 1, 0);
1899 fflush (tty_out->output);
1900
1901 #if defined (IBMR2AIX) && defined (AIXHFT)
1902 {
1903 /* HFT devices normally use ^J as a LF/CR. We forced it to
1904 do the LF only. Now, we need to reset it. */
1905 struct termio tty;
1906
1907 if (ioctl (1, HFTGETID, &tty) != -1)
1908 write (1, "\033[20h", 5);
1909 }
1910 #endif
1911
1912 tty_reset_terminal_modes (tty_out->display);
1913 fflush (TTY_OUTPUT (tty_out));
1914 #ifdef BSD_SYSTEM
1915 #ifndef BSD4_1
1916 /* Avoid possible loss of output when changing terminal modes. */
1917 fsync (fileno (TTY_OUTPUT (tty_out)));
1918 #endif
1919 #endif
1920
1921 #ifdef F_SETFL
1922 #ifndef F_SETOWN_BUG
1923 #ifdef F_SETOWN /* F_SETFL does not imply existence of F_SETOWN */
1924 if (interrupt_input)
1925 {
1926 reset_sigio (fileno (TTY_INPUT (tty_out)));
1927 fcntl (fileno (TTY_INPUT (tty_out)), F_SETOWN,
1928 old_fcntl_owner[fileno (TTY_INPUT (tty_out))]);
1929 }
1930 #endif /* F_SETOWN */
1931 #endif /* F_SETOWN_BUG */
1932 #ifdef O_NDELAY
1933 fcntl (fileno (TTY_INPUT (tty_out)), F_SETFL,
1934 fcntl (fileno (TTY_INPUT (tty_out)), F_GETFL, 0) & ~O_NDELAY);
1935 #endif
1936 #endif /* F_SETFL */
1937 #ifdef BSD4_1
1938 if (interrupt_input)
1939 reset_sigio (fileno (TTY_INPUT (tty_out)));
1940 #endif /* BSD4_1 */
1941
1942 if (tty_out->old_tty)
1943 while (EMACS_SET_TTY (fileno (TTY_INPUT (tty_out)),
1944 tty_out->old_tty, 0) < 0 && errno == EINTR)
1945 ;
1946
1947 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */
1948 dos_ttcooked ();
1949 #endif
1950
1951 #ifdef SET_LINE_DISCIPLINE
1952 /* Ultrix's termios *ignores* any line discipline except TERMIODISC.
1953 A different old line discipline is therefore not restored, yet.
1954 Restore the old line discipline by hand. */
1955 ioctl (0, TIOCSETD, &tty_out->old_tty.main.c_line);
1956 #endif
1957
1958 #ifdef AIXHFT
1959 hft_reset ();
1960 #endif
1961
1962 #ifdef BSD_PGRPS
1963 widen_foreground_group (fileno (TTY_INPUT (tty_out)));
1964 #endif
1965 }
1966 \f
1967 #ifdef HAVE_PTYS
1968
1969 /* Set up the proper status flags for use of a pty. */
1970
1971 void
1972 setup_pty (fd)
1973 int fd;
1974 {
1975 /* I'm told that TOICREMOTE does not mean control chars
1976 "can't be sent" but rather that they don't have
1977 input-editing or signaling effects.
1978 That should be good, because we have other ways
1979 to do those things in Emacs.
1980 However, telnet mode seems not to work on 4.2.
1981 So TIOCREMOTE is turned off now. */
1982
1983 /* Under hp-ux, if TIOCREMOTE is turned on, some calls
1984 will hang. In particular, the "timeout" feature (which
1985 causes a read to return if there is no data available)
1986 does this. Also it is known that telnet mode will hang
1987 in such a way that Emacs must be stopped (perhaps this
1988 is the same problem).
1989
1990 If TIOCREMOTE is turned off, then there is a bug in
1991 hp-ux which sometimes loses data. Apparently the
1992 code which blocks the master process when the internal
1993 buffer fills up does not work. Other than this,
1994 though, everything else seems to work fine.
1995
1996 Since the latter lossage is more benign, we may as well
1997 lose that way. -- cph */
1998 #ifdef FIONBIO
1999 #if defined(SYSV_PTYS) || defined(UNIX98_PTYS)
2000 {
2001 int on = 1;
2002 ioctl (fd, FIONBIO, &on);
2003 }
2004 #endif
2005 #endif
2006 #ifdef IBMRTAIX
2007 /* On AIX, the parent gets SIGHUP when a pty attached child dies. So, we */
2008 /* ignore SIGHUP once we've started a child on a pty. Note that this may */
2009 /* cause EMACS not to die when it should, i.e., when its own controlling */
2010 /* tty goes away. I've complained to the AIX developers, and they may */
2011 /* change this behavior, but I'm not going to hold my breath. */
2012 signal (SIGHUP, SIG_IGN);
2013 #endif
2014 }
2015 #endif /* HAVE_PTYS */
2016 \f
2017 #ifdef VMS
2018
2019 /* Assigning an input channel is done at the start of Emacs execution.
2020 This is called each time Emacs is resumed, also, but does nothing
2021 because input_chain is no longer zero. */
2022
2023 void
2024 init_vms_input ()
2025 {
2026 int status;
2027
2028 if (fileno (TTY_INPUT (CURTTY())) == 0)
2029 {
2030 status = SYS$ASSIGN (&input_dsc, &fileno (TTY_INPUT (CURTTY())), 0, 0);
2031 if (! (status & 1))
2032 LIB$STOP (status);
2033 }
2034 }
2035
2036 /* Deassigning the input channel is done before exiting. */
2037
2038 void
2039 stop_vms_input ()
2040 {
2041 return SYS$DASSGN (fileno (TTY_INPUT (CURTTY())));
2042 }
2043
2044 short input_buffer;
2045
2046 /* Request reading one character into the keyboard buffer.
2047 This is done as soon as the buffer becomes empty. */
2048
2049 void
2050 queue_kbd_input ()
2051 {
2052 int status;
2053 extern kbd_input_ast ();
2054
2055 waiting_for_ast = 0;
2056 stop_input = 0;
2057 status = SYS$QIO (0, fileno (TTY_INPUT (CURTTY())), IO$_READVBLK,
2058 &input_iosb, kbd_input_ast, 1,
2059 &input_buffer, 1, 0, terminator_mask, 0, 0);
2060 }
2061
2062 int input_count;
2063
2064 /* Ast routine that is called when keyboard input comes in
2065 in accord with the SYS$QIO above. */
2066
2067 void
2068 kbd_input_ast ()
2069 {
2070 register int c = -1;
2071 int old_errno = errno;
2072 extern EMACS_TIME *input_available_clear_time;
2073
2074 if (waiting_for_ast)
2075 SYS$SETEF (input_ef);
2076 waiting_for_ast = 0;
2077 input_count++;
2078 #ifdef ASTDEBUG
2079 if (input_count == 25)
2080 exit (1);
2081 printf ("Ast # %d,", input_count);
2082 printf (" iosb = %x, %x, %x, %x",
2083 input_iosb.offset, input_iosb.status, input_iosb.termlen,
2084 input_iosb.term);
2085 #endif
2086 if (input_iosb.offset)
2087 {
2088 c = input_buffer;
2089 #ifdef ASTDEBUG
2090 printf (", char = 0%o", c);
2091 #endif
2092 }
2093 #ifdef ASTDEBUG
2094 printf ("\n");
2095 fflush (stdout);
2096 sleep (1);
2097 #endif
2098 if (! stop_input)
2099 queue_kbd_input ();
2100 if (c >= 0)
2101 {
2102 struct input_event e;
2103 EVENT_INIT (e);
2104
2105 e.kind = ASCII_KEYSTROKE_EVENT;
2106 XSETINT (e.code, c);
2107 e.frame_or_window = selected_frame;
2108 kbd_buffer_store_event (&e);
2109 }
2110 if (input_available_clear_time)
2111 EMACS_SET_SECS_USECS (*input_available_clear_time, 0, 0);
2112 errno = old_errno;
2113 }
2114
2115 /* Wait until there is something in kbd_buffer. */
2116
2117 void
2118 wait_for_kbd_input ()
2119 {
2120 extern int have_process_input, process_exited;
2121
2122 /* If already something, avoid doing system calls. */
2123 if (detect_input_pending ())
2124 {
2125 return;
2126 }
2127 /* Clear a flag, and tell ast routine above to set it. */
2128 SYS$CLREF (input_ef);
2129 waiting_for_ast = 1;
2130 /* Check for timing error: ast happened while we were doing that. */
2131 if (!detect_input_pending ())
2132 {
2133 /* No timing error: wait for flag to be set. */
2134 set_waiting_for_input (0);
2135 SYS$WFLOR (input_ef, input_eflist);
2136 clear_waiting_for_input ();
2137 if (!detect_input_pending ())
2138 /* Check for subprocess input availability */
2139 {
2140 int dsp = have_process_input || process_exited;
2141
2142 SYS$CLREF (process_ef);
2143 if (have_process_input)
2144 process_command_input ();
2145 if (process_exited)
2146 process_exit ();
2147 if (dsp)
2148 {
2149 update_mode_lines++;
2150 prepare_menu_bars ();
2151 redisplay_preserve_echo_area (18);
2152 }
2153 }
2154 }
2155 waiting_for_ast = 0;
2156 }
2157
2158 /* Get rid of any pending QIO, when we are about to suspend
2159 or when we want to throw away pending input.
2160 We wait for a positive sign that the AST routine has run
2161 and therefore there is no I/O request queued when we return.
2162 SYS$SETAST is used to avoid a timing error. */
2163
2164 void
2165 end_kbd_input ()
2166 {
2167 #ifdef ASTDEBUG
2168 printf ("At end_kbd_input.\n");
2169 fflush (stdout);
2170 sleep (1);
2171 #endif
2172 if (LIB$AST_IN_PROG ()) /* Don't wait if suspending from kbd_buffer_store_event! */
2173 {
2174 SYS$CANCEL (fileno (TTY_INPUT (CURTTY())));
2175 return;
2176 }
2177
2178 SYS$SETAST (0);
2179 /* Clear a flag, and tell ast routine above to set it. */
2180 SYS$CLREF (input_ef);
2181 waiting_for_ast = 1;
2182 stop_input = 1;
2183 SYS$CANCEL (fileno (TTY_INPUT (CURTTY())));
2184 SYS$SETAST (1);
2185 SYS$WAITFR (input_ef);
2186 waiting_for_ast = 0;
2187 }
2188
2189 /* Wait for either input available or time interval expiry. */
2190
2191 void
2192 input_wait_timeout (timeval)
2193 int timeval; /* Time to wait, in seconds */
2194 {
2195 int time [2];
2196 static int zero = 0;
2197 static int large = -10000000;
2198
2199 LIB$EMUL (&timeval, &large, &zero, time); /* Convert to VMS format */
2200
2201 /* If already something, avoid doing system calls. */
2202 if (detect_input_pending ())
2203 {
2204 return;
2205 }
2206 /* Clear a flag, and tell ast routine above to set it. */
2207 SYS$CLREF (input_ef);
2208 waiting_for_ast = 1;
2209 /* Check for timing error: ast happened while we were doing that. */
2210 if (!detect_input_pending ())
2211 {
2212 /* No timing error: wait for flag to be set. */
2213 SYS$CANTIM (1, 0);
2214 if (SYS$SETIMR (timer_ef, time, 0, 1) & 1) /* Set timer */
2215 SYS$WFLOR (timer_ef, timer_eflist); /* Wait for timer expiry or input */
2216 }
2217 waiting_for_ast = 0;
2218 }
2219
2220 /* The standard `sleep' routine works some other way
2221 and it stops working if you have ever quit out of it.
2222 This one continues to work. */
2223
2224 sys_sleep (timeval)
2225 int timeval;
2226 {
2227 int time [2];
2228 static int zero = 0;
2229 static int large = -10000000;
2230
2231 LIB$EMUL (&timeval, &large, &zero, time); /* Convert to VMS format */
2232
2233 SYS$CANTIM (1, 0);
2234 if (SYS$SETIMR (timer_ef, time, 0, 1) & 1) /* Set timer */
2235 SYS$WAITFR (timer_ef); /* Wait for timer expiry only */
2236 }
2237
2238 void
2239 init_sigio (fd)
2240 int fd;
2241 {
2242 request_sigio ();
2243 }
2244
2245 reset_sigio (fd)
2246 int fd;
2247 {
2248 unrequest_sigio ();
2249 }
2250
2251 void
2252 request_sigio ()
2253 {
2254 croak ("request sigio");
2255 }
2256
2257 void
2258 unrequest_sigio ()
2259 {
2260 croak ("unrequest sigio");
2261 }
2262
2263 #endif /* VMS */
2264 \f
2265 /* Note that VMS compiler won't accept defined (CANNOT_DUMP). */
2266 #ifndef CANNOT_DUMP
2267 #define NEED_STARTS
2268 #endif
2269
2270 #ifndef SYSTEM_MALLOC
2271 #ifndef NEED_STARTS
2272 #define NEED_STARTS
2273 #endif
2274 #endif
2275
2276 #ifdef NEED_STARTS
2277 /* Some systems that cannot dump also cannot implement these. */
2278
2279 /*
2280 * Return the address of the start of the text segment prior to
2281 * doing an unexec. After unexec the return value is undefined.
2282 * See crt0.c for further explanation and _start.
2283 *
2284 */
2285
2286 #if !(defined (__NetBSD__) && defined (__ELF__))
2287 #ifndef HAVE_TEXT_START
2288 char *
2289 start_of_text ()
2290 {
2291 #ifdef TEXT_START
2292 return ((char *) TEXT_START);
2293 #else
2294 #ifdef GOULD
2295 extern csrt ();
2296 return ((char *) csrt);
2297 #else /* not GOULD */
2298 extern int _start ();
2299 return ((char *) _start);
2300 #endif /* GOULD */
2301 #endif /* TEXT_START */
2302 }
2303 #endif /* not HAVE_TEXT_START */
2304 #endif
2305
2306 /*
2307 * Return the address of the start of the data segment prior to
2308 * doing an unexec. After unexec the return value is undefined.
2309 * See crt0.c for further information and definition of data_start.
2310 *
2311 * Apparently, on BSD systems this is etext at startup. On
2312 * USG systems (swapping) this is highly mmu dependent and
2313 * is also dependent on whether or not the program is running
2314 * with shared text. Generally there is a (possibly large)
2315 * gap between end of text and start of data with shared text.
2316 *
2317 * On Uniplus+ systems with shared text, data starts at a
2318 * fixed address. Each port (from a given oem) is generally
2319 * different, and the specific value of the start of data can
2320 * be obtained via the UniPlus+ specific "uvar" system call,
2321 * however the method outlined in crt0.c seems to be more portable.
2322 *
2323 * Probably what will have to happen when a USG unexec is available,
2324 * at least on UniPlus, is temacs will have to be made unshared so
2325 * that text and data are contiguous. Then once loadup is complete,
2326 * unexec will produce a shared executable where the data can be
2327 * at the normal shared text boundary and the startofdata variable
2328 * will be patched by unexec to the correct value.
2329 *
2330 */
2331
2332 #ifndef start_of_data
2333 char *
2334 start_of_data ()
2335 {
2336 #ifdef DATA_START
2337 return ((char *) DATA_START);
2338 #else
2339 #ifdef ORDINARY_LINK
2340 /*
2341 * This is a hack. Since we're not linking crt0.c or pre_crt0.c,
2342 * data_start isn't defined. We take the address of environ, which
2343 * is known to live at or near the start of the system crt0.c, and
2344 * we don't sweat the handful of bytes that might lose.
2345 */
2346 extern char **environ;
2347
2348 return ((char *) &environ);
2349 #else
2350 extern int data_start;
2351 return ((char *) &data_start);
2352 #endif /* ORDINARY_LINK */
2353 #endif /* DATA_START */
2354 }
2355 #endif /* start_of_data */
2356 #endif /* NEED_STARTS (not CANNOT_DUMP or not SYSTEM_MALLOC) */
2357 \f
2358 /* init_system_name sets up the string for the Lisp function
2359 system-name to return. */
2360
2361 #ifdef BSD4_1
2362 #include <whoami.h>
2363 #endif
2364
2365 extern Lisp_Object Vsystem_name;
2366
2367 #ifndef BSD4_1
2368 #ifndef VMS
2369 #ifdef HAVE_SOCKETS
2370 #include <sys/socket.h>
2371 #include <netdb.h>
2372 #endif /* HAVE_SOCKETS */
2373 #endif /* not VMS */
2374 #endif /* not BSD4_1 */
2375
2376 #ifdef TRY_AGAIN
2377 #ifndef HAVE_H_ERRNO
2378 extern int h_errno;
2379 #endif
2380 #endif /* TRY_AGAIN */
2381
2382 void
2383 init_system_name ()
2384 {
2385 #ifdef BSD4_1
2386 Vsystem_name = build_string (sysname);
2387 #else
2388 #ifdef VMS
2389 char *sp, *end;
2390 if ((sp = egetenv ("SYS$NODE")) == 0)
2391 Vsystem_name = build_string ("vax-vms");
2392 else if ((end = index (sp, ':')) == 0)
2393 Vsystem_name = build_string (sp);
2394 else
2395 Vsystem_name = make_string (sp, end - sp);
2396 #else
2397 #ifndef HAVE_GETHOSTNAME
2398 struct utsname uts;
2399 uname (&uts);
2400 Vsystem_name = build_string (uts.nodename);
2401 #else /* HAVE_GETHOSTNAME */
2402 unsigned int hostname_size = 256;
2403 char *hostname = (char *) alloca (hostname_size);
2404
2405 /* Try to get the host name; if the buffer is too short, try
2406 again. Apparently, the only indication gethostname gives of
2407 whether the buffer was large enough is the presence or absence
2408 of a '\0' in the string. Eech. */
2409 for (;;)
2410 {
2411 gethostname (hostname, hostname_size - 1);
2412 hostname[hostname_size - 1] = '\0';
2413
2414 /* Was the buffer large enough for the '\0'? */
2415 if (strlen (hostname) < hostname_size - 1)
2416 break;
2417
2418 hostname_size <<= 1;
2419 hostname = (char *) alloca (hostname_size);
2420 }
2421 #ifdef HAVE_SOCKETS
2422 /* Turn the hostname into the official, fully-qualified hostname.
2423 Don't do this if we're going to dump; this can confuse system
2424 libraries on some machines and make the dumped emacs core dump. */
2425 #ifndef CANNOT_DUMP
2426 if (initialized)
2427 #endif /* not CANNOT_DUMP */
2428 if (! index (hostname, '.'))
2429 {
2430 struct hostent *hp;
2431 int count;
2432 for (count = 0;; count++)
2433 {
2434 #ifdef TRY_AGAIN
2435 h_errno = 0;
2436 #endif
2437 hp = gethostbyname (hostname);
2438 #ifdef TRY_AGAIN
2439 if (! (hp == 0 && h_errno == TRY_AGAIN))
2440 #endif
2441 break;
2442 if (count >= 5)
2443 break;
2444 Fsleep_for (make_number (1), Qnil);
2445 }
2446 if (hp)
2447 {
2448 char *fqdn = (char *) hp->h_name;
2449 #if 0
2450 char *p;
2451 #endif
2452
2453 if (!index (fqdn, '.'))
2454 {
2455 /* We still don't have a fully qualified domain name.
2456 Try to find one in the list of alternate names */
2457 char **alias = hp->h_aliases;
2458 while (*alias && !index (*alias, '.'))
2459 alias++;
2460 if (*alias)
2461 fqdn = *alias;
2462 }
2463 hostname = fqdn;
2464 #if 0
2465 /* Convert the host name to lower case. */
2466 /* Using ctype.h here would introduce a possible locale
2467 dependence that is probably wrong for hostnames. */
2468 p = hostname;
2469 while (*p)
2470 {
2471 if (*p >= 'A' && *p <= 'Z')
2472 *p += 'a' - 'A';
2473 p++;
2474 }
2475 #endif
2476 }
2477 }
2478 #endif /* HAVE_SOCKETS */
2479 /* We used to try using getdomainname here,
2480 but NIIBE Yutaka <gniibe@etl.go.jp> says that
2481 getdomainname gets the NIS/YP domain which often is not the same
2482 as in Internet domain name. */
2483 #if 0 /* Turned off because sysinfo is not really likely to return the
2484 correct Internet domain. */
2485 #if (HAVE_SYSINFO && defined (SI_SRPC_DOMAIN))
2486 if (! index (hostname, '.'))
2487 {
2488 /* The hostname is not fully qualified. Append the domain name. */
2489
2490 int hostlen = strlen (hostname);
2491 int domain_size = 256;
2492
2493 for (;;)
2494 {
2495 char *domain = (char *) alloca (domain_size + 1);
2496 char *fqdn = (char *) alloca (hostlen + 1 + domain_size + 1);
2497 int sys_domain_size = sysinfo (SI_SRPC_DOMAIN, domain, domain_size);
2498 if (sys_domain_size <= 0)
2499 break;
2500 if (domain_size < sys_domain_size)
2501 {
2502 domain_size = sys_domain_size;
2503 continue;
2504 }
2505 strcpy (fqdn, hostname);
2506 if (domain[0] == '.')
2507 strcpy (fqdn + hostlen, domain);
2508 else if (domain[0] != 0)
2509 {
2510 fqdn[hostlen] = '.';
2511 strcpy (fqdn + hostlen + 1, domain);
2512 }
2513 hostname = fqdn;
2514 break;
2515 }
2516 }
2517 #endif /* HAVE_SYSINFO && defined (SI_SRPC_DOMAIN) */
2518 #endif /* 0 */
2519 Vsystem_name = build_string (hostname);
2520 #endif /* HAVE_GETHOSTNAME */
2521 #endif /* VMS */
2522 #endif /* BSD4_1 */
2523 {
2524 unsigned char *p;
2525 for (p = SDATA (Vsystem_name); *p; p++)
2526 if (*p == ' ' || *p == '\t')
2527 *p = '-';
2528 }
2529 }
2530 \f
2531 #ifndef MSDOS
2532 #ifndef VMS
2533 #if !defined (HAVE_SELECT) || defined (BROKEN_SELECT_NON_X)
2534
2535 #include "sysselect.h"
2536 #undef select
2537
2538 #if defined (HAVE_X_WINDOWS) && !defined (HAVE_SELECT)
2539 /* Cause explanatory error message at compile time,
2540 since the select emulation is not good enough for X. */
2541 int *x = &x_windows_lose_if_no_select_system_call;
2542 #endif
2543
2544 /* Emulate as much as select as is possible under 4.1 and needed by Gnu Emacs
2545 * Only checks read descriptors.
2546 */
2547 /* How long to wait between checking fds in select */
2548 #define SELECT_PAUSE 1
2549 int select_alarmed;
2550
2551 /* For longjmp'ing back to read_input_waiting. */
2552
2553 jmp_buf read_alarm_throw;
2554
2555 /* Nonzero if the alarm signal should throw back to read_input_waiting.
2556 The read_socket_hook function sets this to 1 while it is waiting. */
2557
2558 int read_alarm_should_throw;
2559
2560 SIGTYPE
2561 select_alarm ()
2562 {
2563 select_alarmed = 1;
2564 #ifdef BSD4_1
2565 sigrelse (SIGALRM);
2566 #else /* not BSD4_1 */
2567 signal (SIGALRM, SIG_IGN);
2568 #endif /* not BSD4_1 */
2569 if (read_alarm_should_throw)
2570 longjmp (read_alarm_throw, 1);
2571 }
2572
2573 #ifndef WINDOWSNT
2574 /* Only rfds are checked. */
2575 int
2576 sys_select (nfds, rfds, wfds, efds, timeout)
2577 int nfds;
2578 SELECT_TYPE *rfds, *wfds, *efds;
2579 EMACS_TIME *timeout;
2580 {
2581 int ravail = 0;
2582 SELECT_TYPE orfds;
2583 int timeoutval;
2584 int *local_timeout;
2585 extern int proc_buffered_char[];
2586 #ifndef subprocesses
2587 int process_tick = 0, update_tick = 0;
2588 #else
2589 extern int process_tick, update_tick;
2590 #endif
2591 unsigned char buf;
2592
2593 #if defined (HAVE_SELECT) && defined (HAVE_X_WINDOWS)
2594 /* If we're using X, then the native select will work; we only need the
2595 emulation for non-X usage. */
2596 if (!NILP (Vwindow_system))
2597 return select (nfds, rfds, wfds, efds, timeout);
2598 #endif
2599 timeoutval = timeout ? EMACS_SECS (*timeout) : 100000;
2600 local_timeout = &timeoutval;
2601 FD_ZERO (&orfds);
2602 if (rfds)
2603 {
2604 orfds = *rfds;
2605 FD_ZERO (rfds);
2606 }
2607 if (wfds)
2608 FD_ZERO (wfds);
2609 if (efds)
2610 FD_ZERO (efds);
2611
2612 /* If we are looking only for the terminal, with no timeout,
2613 just read it and wait -- that's more efficient. */
2614 if (*local_timeout == 100000 && process_tick == update_tick
2615 && FD_ISSET (0, &orfds))
2616 {
2617 int fd;
2618 for (fd = 1; fd < nfds; ++fd)
2619 if (FD_ISSET (fd, &orfds))
2620 goto hardway;
2621 if (! detect_input_pending ())
2622 read_input_waiting ();
2623 FD_SET (0, rfds);
2624 return 1;
2625 }
2626
2627 hardway:
2628 /* Once a second, till the timer expires, check all the flagged read
2629 * descriptors to see if any input is available. If there is some then
2630 * set the corresponding bit in the return copy of rfds.
2631 */
2632 while (1)
2633 {
2634 register int to_check, fd;
2635
2636 if (rfds)
2637 {
2638 for (to_check = nfds, fd = 0; --to_check >= 0; fd++)
2639 {
2640 if (FD_ISSET (fd, &orfds))
2641 {
2642 int avail = 0, status = 0;
2643
2644 if (fd == 0)
2645 avail = detect_input_pending (); /* Special keyboard handler */
2646 else
2647 {
2648 #ifdef FIONREAD
2649 status = ioctl (fd, FIONREAD, &avail);
2650 #else /* no FIONREAD */
2651 /* Hoping it will return -1 if nothing available
2652 or 0 if all 0 chars requested are read. */
2653 if (proc_buffered_char[fd] >= 0)
2654 avail = 1;
2655 else
2656 {
2657 avail = read (fd, &buf, 1);
2658 if (avail > 0)
2659 proc_buffered_char[fd] = buf;
2660 }
2661 #endif /* no FIONREAD */
2662 }
2663 if (status >= 0 && avail > 0)
2664 {
2665 FD_SET (fd, rfds);
2666 ravail++;
2667 }
2668 }
2669 }
2670 }
2671 if (*local_timeout == 0 || ravail != 0 || process_tick != update_tick)
2672 break;
2673
2674 turn_on_atimers (0);
2675 signal (SIGALRM, select_alarm);
2676 select_alarmed = 0;
2677 alarm (SELECT_PAUSE);
2678
2679 /* Wait for a SIGALRM (or maybe a SIGTINT) */
2680 while (select_alarmed == 0 && *local_timeout != 0
2681 && process_tick == update_tick)
2682 {
2683 /* If we are interested in terminal input,
2684 wait by reading the terminal.
2685 That makes instant wakeup for terminal input at least. */
2686 if (FD_ISSET (0, &orfds))
2687 {
2688 read_input_waiting ();
2689 if (detect_input_pending ())
2690 select_alarmed = 1;
2691 }
2692 else
2693 pause ();
2694 }
2695 (*local_timeout) -= SELECT_PAUSE;
2696
2697 /* Reset the old alarm if there was one. */
2698 turn_on_atimers (1);
2699
2700 if (*local_timeout == 0) /* Stop on timer being cleared */
2701 break;
2702 }
2703 return ravail;
2704 }
2705 #endif not WINDOWSNT
2706
2707 /* Read keyboard input into the standard buffer,
2708 waiting for at least one character. */
2709
2710 /* Make all keyboard buffers much bigger when using a window system. */
2711 #ifdef HAVE_WINDOW_SYSTEM
2712 #define BUFFER_SIZE_FACTOR 16
2713 #else
2714 #define BUFFER_SIZE_FACTOR 1
2715 #endif
2716
2717 void
2718 read_input_waiting ()
2719 {
2720 /* XXX This needs to be updated for multi-tty support. Does
2721 anybody need to emulate select these days? */
2722 int nread, i;
2723 extern int quit_char;
2724
2725 if (read_socket_hook)
2726 {
2727 struct input_event buf[256];
2728 for (i = 0; i < 256; i++)
2729 EVENT_INIT (buf[i]);
2730
2731 read_alarm_should_throw = 0;
2732 if (! setjmp (read_alarm_throw))
2733 nread = (*read_socket_hook) (0, buf, 256, 1);
2734 else
2735 nread = -1;
2736
2737 /* Scan the chars for C-g and store them in kbd_buffer. */
2738 for (i = 0; i < nread; i++)
2739 {
2740 kbd_buffer_store_event (&buf[i]);
2741 /* Don't look at input that follows a C-g too closely.
2742 This reduces lossage due to autorepeat on C-g. */
2743 if (buf[i].kind == ASCII_KEYSTROKE_EVENT
2744 && buf[i].code == quit_char)
2745 break;
2746 }
2747 }
2748 else
2749 {
2750 struct input_event e;
2751 char buf[3];
2752 nread = read (fileno (stdin), buf, 1);
2753 EVENT_INIT (e);
2754
2755 /* Scan the chars for C-g and store them in kbd_buffer. */
2756 e.kind = ASCII_KEYSTROKE_EVENT;
2757 e.frame_or_window = selected_frame;
2758 e.modifiers = 0;
2759 for (i = 0; i < nread; i++)
2760 {
2761 /* Convert chars > 0177 to meta events if desired.
2762 We do this under the same conditions that read_avail_input does. */
2763 if (read_socket_hook == 0)
2764 {
2765 /* If the user says she has a meta key, then believe her. */
2766 if (meta_key == 1 && (buf[i] & 0x80))
2767 e.modifiers = meta_modifier;
2768 if (meta_key != 2)
2769 buf[i] &= ~0x80;
2770 }
2771
2772 XSETINT (e.code, buf[i]);
2773 kbd_buffer_store_event (&e);
2774 /* Don't look at input that follows a C-g too closely.
2775 This reduces lossage due to autorepeat on C-g. */
2776 if (buf[i] == quit_char)
2777 break;
2778 }
2779 }
2780 }
2781
2782 #if !defined (HAVE_SELECT) || defined (BROKEN_SELECT_NON_X)
2783 #define select sys_select
2784 #endif
2785
2786 #endif /* not HAVE_SELECT */
2787 #endif /* not VMS */
2788 #endif /* not MSDOS */
2789 \f
2790 #ifdef BSD4_1
2791 void
2792 init_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 reset_sigio (fd)
2803 int fd;
2804 {
2805 if (noninteractive)
2806 return;
2807 lmode = ~LINTRUP & lmode;
2808 ioctl (fd, TIOCLSET, &lmode);
2809 }
2810
2811 void
2812 request_sigio ()
2813 {
2814 sigrelse (SIGTINT);
2815
2816 interrupts_deferred = 0;
2817 }
2818
2819 void
2820 unrequest_sigio ()
2821 {
2822 sighold (SIGTINT);
2823
2824 interrupts_deferred = 1;
2825 }
2826
2827 /* still inside #ifdef BSD4_1 */
2828 #ifdef subprocesses
2829
2830 int sigheld; /* Mask of held signals */
2831
2832 void
2833 sigholdx (signum)
2834 int signum;
2835 {
2836 sigheld |= sigbit (signum);
2837 sighold (signum);
2838 }
2839
2840 void
2841 sigisheld (signum)
2842 int signum;
2843 {
2844 sigheld |= sigbit (signum);
2845 }
2846
2847 void
2848 sigunhold (signum)
2849 int signum;
2850 {
2851 sigheld &= ~sigbit (signum);
2852 sigrelse (signum);
2853 }
2854
2855 void
2856 sigfree () /* Free all held signals */
2857 {
2858 int i;
2859 for (i = 0; i < NSIG; i++)
2860 if (sigheld & sigbit (i))
2861 sigrelse (i);
2862 sigheld = 0;
2863 }
2864
2865 int
2866 sigbit (i)
2867 {
2868 return 1 << (i - 1);
2869 }
2870 #endif /* subprocesses */
2871 #endif /* BSD4_1 */
2872 \f
2873 /* POSIX signals support - DJB */
2874 /* Anyone with POSIX signals should have ANSI C declarations */
2875
2876 #ifdef POSIX_SIGNALS
2877
2878 sigset_t empty_mask, full_mask;
2879
2880 signal_handler_t
2881 sys_signal (int signal_number, signal_handler_t action)
2882 {
2883 struct sigaction new_action, old_action;
2884 sigemptyset (&new_action.sa_mask);
2885 new_action.sa_handler = action;
2886 #if defined (SA_RESTART) && ! defined (BROKEN_SA_RESTART)
2887 /* Emacs mostly works better with restartable system services. If this
2888 flag exists, we probably want to turn it on here.
2889 However, on some systems this resets the timeout of `select'
2890 which means that `select' never finishes if it keeps getting signals.
2891 BROKEN_SA_RESTART is defined on those systems. */
2892 new_action.sa_flags = SA_RESTART;
2893 #else
2894 new_action.sa_flags = 0;
2895 #endif
2896 sigaction (signal_number, &new_action, &old_action);
2897 return (old_action.sa_handler);
2898 }
2899
2900 #ifndef __GNUC__
2901 /* If we're compiling with GCC, we don't need this function, since it
2902 can be written as a macro. */
2903 sigset_t
2904 sys_sigmask (int sig)
2905 {
2906 sigset_t mask;
2907 sigemptyset (&mask);
2908 sigaddset (&mask, sig);
2909 return mask;
2910 }
2911 #endif
2912
2913 /* I'd like to have these guys return pointers to the mask storage in here,
2914 but there'd be trouble if the code was saving multiple masks. I'll be
2915 safe and pass the structure. It normally won't be more than 2 bytes
2916 anyhow. - DJB */
2917
2918 sigset_t
2919 sys_sigblock (sigset_t new_mask)
2920 {
2921 sigset_t old_mask;
2922 sigprocmask (SIG_BLOCK, &new_mask, &old_mask);
2923 return (old_mask);
2924 }
2925
2926 sigset_t
2927 sys_sigunblock (sigset_t new_mask)
2928 {
2929 sigset_t old_mask;
2930 sigprocmask (SIG_UNBLOCK, &new_mask, &old_mask);
2931 return (old_mask);
2932 }
2933
2934 sigset_t
2935 sys_sigsetmask (sigset_t new_mask)
2936 {
2937 sigset_t old_mask;
2938 sigprocmask (SIG_SETMASK, &new_mask, &old_mask);
2939 return (old_mask);
2940 }
2941
2942 #endif /* POSIX_SIGNALS */
2943 \f
2944 #if !defined HAVE_STRSIGNAL && !HAVE_DECL_SYS_SIGLIST
2945 static char *my_sys_siglist[NSIG];
2946 # ifdef sys_siglist
2947 # undef sys_siglist
2948 # endif
2949 # define sys_siglist my_sys_siglist
2950 #endif
2951
2952 void
2953 init_signals ()
2954 {
2955 #ifdef POSIX_SIGNALS
2956 sigemptyset (&empty_mask);
2957 sigfillset (&full_mask);
2958 #endif
2959
2960 #if !defined HAVE_STRSIGNAL && !HAVE_DECL_SYS_SIGLIST
2961 if (! initialized)
2962 {
2963 # ifdef SIGABRT
2964 sys_siglist[SIGABRT] = "Aborted";
2965 # endif
2966 # ifdef SIGAIO
2967 sys_siglist[SIGAIO] = "LAN I/O interrupt";
2968 # endif
2969 # ifdef SIGALRM
2970 sys_siglist[SIGALRM] = "Alarm clock";
2971 # endif
2972 # ifdef SIGBUS
2973 sys_siglist[SIGBUS] = "Bus error";
2974 # endif
2975 # ifdef SIGCLD
2976 sys_siglist[SIGCLD] = "Child status changed";
2977 # endif
2978 # ifdef SIGCHLD
2979 sys_siglist[SIGCHLD] = "Child status changed";
2980 # endif
2981 # ifdef SIGCONT
2982 sys_siglist[SIGCONT] = "Continued";
2983 # endif
2984 # ifdef SIGDANGER
2985 sys_siglist[SIGDANGER] = "Swap space dangerously low";
2986 # endif
2987 # ifdef SIGDGNOTIFY
2988 sys_siglist[SIGDGNOTIFY] = "Notification message in queue";
2989 # endif
2990 # ifdef SIGEMT
2991 sys_siglist[SIGEMT] = "Emulation trap";
2992 # endif
2993 # ifdef SIGFPE
2994 sys_siglist[SIGFPE] = "Arithmetic exception";
2995 # endif
2996 # ifdef SIGFREEZE
2997 sys_siglist[SIGFREEZE] = "SIGFREEZE";
2998 # endif
2999 # ifdef SIGGRANT
3000 sys_siglist[SIGGRANT] = "Monitor mode granted";
3001 # endif
3002 # ifdef SIGHUP
3003 sys_siglist[SIGHUP] = "Hangup";
3004 # endif
3005 # ifdef SIGILL
3006 sys_siglist[SIGILL] = "Illegal instruction";
3007 # endif
3008 # ifdef SIGINT
3009 sys_siglist[SIGINT] = "Interrupt";
3010 # endif
3011 # ifdef SIGIO
3012 sys_siglist[SIGIO] = "I/O possible";
3013 # endif
3014 # ifdef SIGIOINT
3015 sys_siglist[SIGIOINT] = "I/O intervention required";
3016 # endif
3017 # ifdef SIGIOT
3018 sys_siglist[SIGIOT] = "IOT trap";
3019 # endif
3020 # ifdef SIGKILL
3021 sys_siglist[SIGKILL] = "Killed";
3022 # endif
3023 # ifdef SIGLOST
3024 sys_siglist[SIGLOST] = "Resource lost";
3025 # endif
3026 # ifdef SIGLWP
3027 sys_siglist[SIGLWP] = "SIGLWP";
3028 # endif
3029 # ifdef SIGMSG
3030 sys_siglist[SIGMSG] = "Monitor mode data available";
3031 # endif
3032 # ifdef SIGPHONE
3033 sys_siglist[SIGWIND] = "SIGPHONE";
3034 # endif
3035 # ifdef SIGPIPE
3036 sys_siglist[SIGPIPE] = "Broken pipe";
3037 # endif
3038 # ifdef SIGPOLL
3039 sys_siglist[SIGPOLL] = "Pollable event occurred";
3040 # endif
3041 # ifdef SIGPROF
3042 sys_siglist[SIGPROF] = "Profiling timer expired";
3043 # endif
3044 # ifdef SIGPTY
3045 sys_siglist[SIGPTY] = "PTY I/O interrupt";
3046 # endif
3047 # ifdef SIGPWR
3048 sys_siglist[SIGPWR] = "Power-fail restart";
3049 # endif
3050 # ifdef SIGQUIT
3051 sys_siglist[SIGQUIT] = "Quit";
3052 # endif
3053 # ifdef SIGRETRACT
3054 sys_siglist[SIGRETRACT] = "Need to relinguish monitor mode";
3055 # endif
3056 # ifdef SIGSAK
3057 sys_siglist[SIGSAK] = "Secure attention";
3058 # endif
3059 # ifdef SIGSEGV
3060 sys_siglist[SIGSEGV] = "Segmentation violation";
3061 # endif
3062 # ifdef SIGSOUND
3063 sys_siglist[SIGSOUND] = "Sound completed";
3064 # endif
3065 # ifdef SIGSTOP
3066 sys_siglist[SIGSTOP] = "Stopped (signal)";
3067 # endif
3068 # ifdef SIGSTP
3069 sys_siglist[SIGSTP] = "Stopped (user)";
3070 # endif
3071 # ifdef SIGSYS
3072 sys_siglist[SIGSYS] = "Bad argument to system call";
3073 # endif
3074 # ifdef SIGTERM
3075 sys_siglist[SIGTERM] = "Terminated";
3076 # endif
3077 # ifdef SIGTHAW
3078 sys_siglist[SIGTHAW] = "SIGTHAW";
3079 # endif
3080 # ifdef SIGTRAP
3081 sys_siglist[SIGTRAP] = "Trace/breakpoint trap";
3082 # endif
3083 # ifdef SIGTSTP
3084 sys_siglist[SIGTSTP] = "Stopped (user)";
3085 # endif
3086 # ifdef SIGTTIN
3087 sys_siglist[SIGTTIN] = "Stopped (tty input)";
3088 # endif
3089 # ifdef SIGTTOU
3090 sys_siglist[SIGTTOU] = "Stopped (tty output)";
3091 # endif
3092 # ifdef SIGURG
3093 sys_siglist[SIGURG] = "Urgent I/O condition";
3094 # endif
3095 # ifdef SIGUSR1
3096 sys_siglist[SIGUSR1] = "User defined signal 1";
3097 # endif
3098 # ifdef SIGUSR2
3099 sys_siglist[SIGUSR2] = "User defined signal 2";
3100 # endif
3101 # ifdef SIGVTALRM
3102 sys_siglist[SIGVTALRM] = "Virtual timer expired";
3103 # endif
3104 # ifdef SIGWAITING
3105 sys_siglist[SIGWAITING] = "Process's LWPs are blocked";
3106 # endif
3107 # ifdef SIGWINCH
3108 sys_siglist[SIGWINCH] = "Window size changed";
3109 # endif
3110 # ifdef SIGWIND
3111 sys_siglist[SIGWIND] = "SIGWIND";
3112 # endif
3113 # ifdef SIGXCPU
3114 sys_siglist[SIGXCPU] = "CPU time limit exceeded";
3115 # endif
3116 # ifdef SIGXFSZ
3117 sys_siglist[SIGXFSZ] = "File size limit exceeded";
3118 # endif
3119 }
3120 #endif /* !defined HAVE_STRSIGNAL && !defined HAVE_DECL_SYS_SIGLIST */
3121 }
3122 \f
3123 #ifndef HAVE_RANDOM
3124 #ifdef random
3125 #define HAVE_RANDOM
3126 #endif
3127 #endif
3128
3129 /* Figure out how many bits the system's random number generator uses.
3130 `random' and `lrand48' are assumed to return 31 usable bits.
3131 BSD `rand' returns a 31 bit value but the low order bits are unusable;
3132 so we'll shift it and treat it like the 15-bit USG `rand'. */
3133
3134 #ifndef RAND_BITS
3135 # ifdef HAVE_RANDOM
3136 # define RAND_BITS 31
3137 # else /* !HAVE_RANDOM */
3138 # ifdef HAVE_LRAND48
3139 # define RAND_BITS 31
3140 # define random lrand48
3141 # else /* !HAVE_LRAND48 */
3142 # define RAND_BITS 15
3143 # if RAND_MAX == 32767
3144 # define random rand
3145 # else /* RAND_MAX != 32767 */
3146 # if RAND_MAX == 2147483647
3147 # define random() (rand () >> 16)
3148 # else /* RAND_MAX != 2147483647 */
3149 # ifdef USG
3150 # define random rand
3151 # else
3152 # define random() (rand () >> 16)
3153 # endif /* !USG */
3154 # endif /* RAND_MAX != 2147483647 */
3155 # endif /* RAND_MAX != 32767 */
3156 # endif /* !HAVE_LRAND48 */
3157 # endif /* !HAVE_RANDOM */
3158 #endif /* !RAND_BITS */
3159
3160 void
3161 seed_random (arg)
3162 long arg;
3163 {
3164 #ifdef HAVE_RANDOM
3165 srandom ((unsigned int)arg);
3166 #else
3167 # ifdef HAVE_LRAND48
3168 srand48 (arg);
3169 # else
3170 srand ((unsigned int)arg);
3171 # endif
3172 #endif
3173 }
3174
3175 /*
3176 * Build a full Emacs-sized word out of whatever we've got.
3177 * This suffices even for a 64-bit architecture with a 15-bit rand.
3178 */
3179 long
3180 get_random ()
3181 {
3182 long val = random ();
3183 #if VALBITS > RAND_BITS
3184 val = (val << RAND_BITS) ^ random ();
3185 #if VALBITS > 2*RAND_BITS
3186 val = (val << RAND_BITS) ^ random ();
3187 #if VALBITS > 3*RAND_BITS
3188 val = (val << RAND_BITS) ^ random ();
3189 #if VALBITS > 4*RAND_BITS
3190 val = (val << RAND_BITS) ^ random ();
3191 #endif /* need at least 5 */
3192 #endif /* need at least 4 */
3193 #endif /* need at least 3 */
3194 #endif /* need at least 2 */
3195 return val & ((1L << VALBITS) - 1);
3196 }
3197 \f
3198 #ifdef WRONG_NAME_INSQUE
3199
3200 insque (q,p)
3201 caddr_t q,p;
3202 {
3203 _insque (q,p);
3204 }
3205
3206 #endif
3207 \f
3208 #ifdef VMS
3209
3210 #ifdef getenv
3211 /* If any place else asks for the TERM variable,
3212 allow it to be overridden with the EMACS_TERM variable
3213 before attempting to translate the logical name TERM. As a last
3214 resort, ask for VAX C's special idea of the TERM variable. */
3215 #undef getenv
3216 char *
3217 sys_getenv (name)
3218 char *name;
3219 {
3220 register char *val;
3221 static char buf[256];
3222 static struct dsc$descriptor_s equiv
3223 = {sizeof (buf), DSC$K_DTYPE_T, DSC$K_CLASS_S, buf};
3224 static struct dsc$descriptor_s d_name
3225 = {0, DSC$K_DTYPE_T, DSC$K_CLASS_S, 0};
3226 short eqlen;
3227
3228 if (!strcmp (name, "TERM"))
3229 {
3230 val = (char *) getenv ("EMACS_TERM");
3231 if (val)
3232 return val;
3233 }
3234
3235 d_name.dsc$w_length = strlen (name);
3236 d_name.dsc$a_pointer = name;
3237 if (LIB$SYS_TRNLOG (&d_name, &eqlen, &equiv) == 1)
3238 {
3239 char *str = (char *) xmalloc (eqlen + 1);
3240 bcopy (buf, str, eqlen);
3241 str[eqlen] = '\0';
3242 /* This is a storage leak, but a pain to fix. With luck,
3243 no one will ever notice. */
3244 return str;
3245 }
3246 return (char *) getenv (name);
3247 }
3248 #endif /* getenv */
3249
3250 #ifdef abort
3251 /* Since VMS doesn't believe in core dumps, the only way to debug this beast is
3252 to force a call on the debugger from within the image. */
3253 #undef abort
3254 sys_abort ()
3255 {
3256 reset_all_sys_modes ();
3257 LIB$SIGNAL (SS$_DEBUG);
3258 }
3259 #endif /* abort */
3260 #endif /* VMS */
3261 \f
3262 #ifdef VMS
3263 #ifdef LINK_CRTL_SHARE
3264 #ifdef SHARABLE_LIB_BUG
3265 /* Variables declared noshare and initialized in sharable libraries
3266 cannot be shared. The VMS linker incorrectly forces you to use a private
3267 version which is uninitialized... If not for this "feature", we
3268 could use the C library definition of sys_nerr and sys_errlist. */
3269 int sys_nerr = 35;
3270 char *sys_errlist[] =
3271 {
3272 "error 0",
3273 "not owner",
3274 "no such file or directory",
3275 "no such process",
3276 "interrupted system call",
3277 "i/o error",
3278 "no such device or address",
3279 "argument list too long",
3280 "exec format error",
3281 "bad file number",
3282 "no child process",
3283 "no more processes",
3284 "not enough memory",
3285 "permission denied",
3286 "bad address",
3287 "block device required",
3288 "mount devices busy",
3289 "file exists",
3290 "cross-device link",
3291 "no such device",
3292 "not a directory",
3293 "is a directory",
3294 "invalid argument",
3295 "file table overflow",
3296 "too many open files",
3297 "not a typewriter",
3298 "text file busy",
3299 "file too big",
3300 "no space left on device",
3301 "illegal seek",
3302 "read-only file system",
3303 "too many links",
3304 "broken pipe",
3305 "math argument",
3306 "result too large",
3307 "I/O stream empty",
3308 "vax/vms specific error code nontranslatable error"
3309 };
3310 #endif /* SHARABLE_LIB_BUG */
3311 #endif /* LINK_CRTL_SHARE */
3312 #endif /* VMS */
3313
3314 #ifndef HAVE_STRERROR
3315 #ifndef WINDOWSNT
3316 char *
3317 strerror (errnum)
3318 int errnum;
3319 {
3320 extern char *sys_errlist[];
3321 extern int sys_nerr;
3322
3323 if (errnum >= 0 && errnum < sys_nerr)
3324 return sys_errlist[errnum];
3325 return (char *) "Unknown error";
3326 }
3327 #endif /* not WINDOWSNT */
3328 #endif /* ! HAVE_STRERROR */
3329 \f
3330 int
3331 emacs_open (path, oflag, mode)
3332 const char *path;
3333 int oflag, mode;
3334 {
3335 register int rtnval;
3336
3337 #ifdef BSD4_1
3338 if (oflag & O_CREAT)
3339 return creat (path, mode);
3340 #endif
3341
3342 while ((rtnval = open (path, oflag, mode)) == -1
3343 && (errno == EINTR));
3344 return (rtnval);
3345 }
3346
3347 int
3348 emacs_close (fd)
3349 int fd;
3350 {
3351 int did_retry = 0;
3352 register int rtnval;
3353
3354 while ((rtnval = close (fd)) == -1
3355 && (errno == EINTR))
3356 did_retry = 1;
3357
3358 /* If close is interrupted SunOS 4.1 may or may not have closed the
3359 file descriptor. If it did the second close will fail with
3360 errno = EBADF. That means we have succeeded. */
3361 if (rtnval == -1 && did_retry && errno == EBADF)
3362 return 0;
3363
3364 return rtnval;
3365 }
3366
3367 int
3368 emacs_read (fildes, buf, nbyte)
3369 int fildes;
3370 char *buf;
3371 unsigned int nbyte;
3372 {
3373 register int rtnval;
3374
3375 while ((rtnval = read (fildes, buf, nbyte)) == -1
3376 && (errno == EINTR));
3377 return (rtnval);
3378 }
3379
3380 int
3381 emacs_write (fildes, buf, nbyte)
3382 int fildes;
3383 const char *buf;
3384 unsigned int nbyte;
3385 {
3386 register int rtnval, bytes_written;
3387
3388 bytes_written = 0;
3389
3390 while (nbyte > 0)
3391 {
3392 rtnval = write (fildes, buf, nbyte);
3393
3394 if (rtnval == -1)
3395 {
3396 if (errno == EINTR)
3397 continue;
3398 else
3399 return (bytes_written ? bytes_written : -1);
3400 }
3401
3402 buf += rtnval;
3403 nbyte -= rtnval;
3404 bytes_written += rtnval;
3405 }
3406 return (bytes_written);
3407 }
3408 \f
3409 #ifdef USG
3410 /*
3411 * All of the following are for USG.
3412 *
3413 * On USG systems the system calls are INTERRUPTIBLE by signals
3414 * that the user program has elected to catch. Thus the system call
3415 * must be retried in these cases. To handle this without massive
3416 * changes in the source code, we remap the standard system call names
3417 * to names for our own functions in sysdep.c that do the system call
3418 * with retries. Actually, for portability reasons, it is good
3419 * programming practice, as this example shows, to limit all actual
3420 * system calls to a single occurrence in the source. Sure, this
3421 * adds an extra level of function call overhead but it is almost
3422 * always negligible. Fred Fish, Unisoft Systems Inc.
3423 */
3424
3425 /*
3426 * Warning, this function may not duplicate 4.2 action properly
3427 * under error conditions.
3428 */
3429
3430 #ifndef MAXPATHLEN
3431 /* In 4.1, param.h fails to define this. */
3432 #define MAXPATHLEN 1024
3433 #endif
3434
3435 #ifndef HAVE_GETWD
3436
3437 char *
3438 getwd (pathname)
3439 char *pathname;
3440 {
3441 char *npath, *spath;
3442 extern char *getcwd ();
3443
3444 BLOCK_INPUT; /* getcwd uses malloc */
3445 spath = npath = getcwd ((char *) 0, MAXPATHLEN);
3446 if (spath == 0)
3447 {
3448 UNBLOCK_INPUT;
3449 return spath;
3450 }
3451 /* On Altos 3068, getcwd can return @hostname/dir, so discard
3452 up to first slash. Should be harmless on other systems. */
3453 while (*npath && *npath != '/')
3454 npath++;
3455 strcpy (pathname, npath);
3456 free (spath); /* getcwd uses malloc */
3457 UNBLOCK_INPUT;
3458 return pathname;
3459 }
3460
3461 #endif /* HAVE_GETWD */
3462
3463 /*
3464 * Emulate rename using unlink/link. Note that this is
3465 * only partially correct. Also, doesn't enforce restriction
3466 * that files be of same type (regular->regular, dir->dir, etc).
3467 */
3468
3469 #ifndef HAVE_RENAME
3470
3471 rename (from, to)
3472 const char *from;
3473 const char *to;
3474 {
3475 if (access (from, 0) == 0)
3476 {
3477 unlink (to);
3478 if (link (from, to) == 0)
3479 if (unlink (from) == 0)
3480 return (0);
3481 }
3482 return (-1);
3483 }
3484
3485 #endif
3486
3487
3488 #ifdef HPUX
3489 #ifndef HAVE_PERROR
3490
3491 /* HPUX curses library references perror, but as far as we know
3492 it won't be called. Anyway this definition will do for now. */
3493
3494 perror ()
3495 {
3496 }
3497
3498 #endif /* not HAVE_PERROR */
3499 #endif /* HPUX */
3500
3501 #ifndef HAVE_DUP2
3502
3503 /*
3504 * Emulate BSD dup2. First close newd if it already exists.
3505 * Then, attempt to dup oldd. If not successful, call dup2 recursively
3506 * until we are, then close the unsuccessful ones.
3507 */
3508
3509 dup2 (oldd, newd)
3510 int oldd;
3511 int newd;
3512 {
3513 register int fd, ret;
3514
3515 emacs_close (newd);
3516
3517 #ifdef F_DUPFD
3518 return fcntl (oldd, F_DUPFD, newd);
3519 #else
3520 fd = dup (old);
3521 if (fd == -1)
3522 return -1;
3523 if (fd == new)
3524 return new;
3525 ret = dup2 (old,new);
3526 emacs_close (fd);
3527 return ret;
3528 #endif
3529 }
3530
3531 #endif /* not HAVE_DUP2 */
3532
3533 /*
3534 * Gettimeofday. Simulate as much as possible. Only accurate
3535 * to nearest second. Emacs doesn't use tzp so ignore it for now.
3536 * Only needed when subprocesses are defined.
3537 */
3538
3539 #ifdef subprocesses
3540 #ifndef VMS
3541 #ifndef HAVE_GETTIMEOFDAY
3542 #ifdef HAVE_TIMEVAL
3543
3544 /* ARGSUSED */
3545 int
3546 gettimeofday (tp, tzp)
3547 struct timeval *tp;
3548 struct timezone *tzp;
3549 {
3550 extern long time ();
3551
3552 tp->tv_sec = time ((long *)0);
3553 tp->tv_usec = 0;
3554 if (tzp != 0)
3555 tzp->tz_minuteswest = -1;
3556 return 0;
3557 }
3558
3559 #endif
3560 #endif
3561 #endif
3562 #endif /* subprocess && !HAVE_GETTIMEOFDAY && HAVE_TIMEVAL && !VMS */
3563
3564 /*
3565 * This function will go away as soon as all the stubs fixed. (fnf)
3566 */
3567
3568 void
3569 croak (badfunc)
3570 char *badfunc;
3571 {
3572 printf ("%s not yet implemented\r\n", badfunc);
3573 reset_all_sys_modes ();
3574 exit (1);
3575 }
3576
3577 #endif /* USG */
3578 \f
3579 /* Directory routines for systems that don't have them. */
3580
3581 #ifdef SYSV_SYSTEM_DIR
3582
3583 #include <dirent.h>
3584
3585 #if defined (BROKEN_CLOSEDIR) || !defined (HAVE_CLOSEDIR)
3586
3587 int
3588 closedir (dirp)
3589 register DIR *dirp; /* stream from opendir */
3590 {
3591 int rtnval;
3592
3593 rtnval = emacs_close (dirp->dd_fd);
3594
3595 /* Some systems (like Solaris) allocate the buffer and the DIR all
3596 in one block. Why in the world are we freeing this ourselves
3597 anyway? */
3598 #if ! (defined (sun) && defined (USG5_4))
3599 xfree ((char *) dirp->dd_buf); /* directory block defined in <dirent.h> */
3600 #endif
3601 xfree ((char *) dirp);
3602
3603 return rtnval;
3604 }
3605 #endif /* BROKEN_CLOSEDIR or not HAVE_CLOSEDIR */
3606 #endif /* SYSV_SYSTEM_DIR */
3607
3608 #ifdef NONSYSTEM_DIR_LIBRARY
3609
3610 DIR *
3611 opendir (filename)
3612 char *filename; /* name of directory */
3613 {
3614 register DIR *dirp; /* -> malloc'ed storage */
3615 register int fd; /* file descriptor for read */
3616 struct stat sbuf; /* result of fstat */
3617
3618 fd = emacs_open (filename, O_RDONLY, 0);
3619 if (fd < 0)
3620 return 0;
3621
3622 BLOCK_INPUT;
3623 if (fstat (fd, &sbuf) < 0
3624 || (sbuf.st_mode & S_IFMT) != S_IFDIR
3625 || (dirp = (DIR *) xmalloc (sizeof (DIR))) == 0)
3626 {
3627 emacs_close (fd);
3628 UNBLOCK_INPUT;
3629 return 0; /* bad luck today */
3630 }
3631 UNBLOCK_INPUT;
3632
3633 dirp->dd_fd = fd;
3634 dirp->dd_loc = dirp->dd_size = 0; /* refill needed */
3635
3636 return dirp;
3637 }
3638
3639 void
3640 closedir (dirp)
3641 register DIR *dirp; /* stream from opendir */
3642 {
3643 emacs_close (dirp->dd_fd);
3644 xfree ((char *) dirp);
3645 }
3646
3647
3648 #ifndef VMS
3649 #define DIRSIZ 14
3650 struct olddir
3651 {
3652 ino_t od_ino; /* inode */
3653 char od_name[DIRSIZ]; /* filename */
3654 };
3655 #endif /* not VMS */
3656
3657 struct direct dir_static; /* simulated directory contents */
3658
3659 /* ARGUSED */
3660 struct direct *
3661 readdir (dirp)
3662 register DIR *dirp; /* stream from opendir */
3663 {
3664 #ifndef VMS
3665 register struct olddir *dp; /* -> directory data */
3666 #else /* VMS */
3667 register struct dir$_name *dp; /* -> directory data */
3668 register struct dir$_version *dv; /* -> version data */
3669 #endif /* VMS */
3670
3671 for (; ;)
3672 {
3673 if (dirp->dd_loc >= dirp->dd_size)
3674 dirp->dd_loc = dirp->dd_size = 0;
3675
3676 if (dirp->dd_size == 0 /* refill buffer */
3677 && (dirp->dd_size = emacs_read (dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ)) <= 0)
3678 return 0;
3679
3680 #ifndef VMS
3681 dp = (struct olddir *) &dirp->dd_buf[dirp->dd_loc];
3682 dirp->dd_loc += sizeof (struct olddir);
3683
3684 if (dp->od_ino != 0) /* not deleted entry */
3685 {
3686 dir_static.d_ino = dp->od_ino;
3687 strncpy (dir_static.d_name, dp->od_name, DIRSIZ);
3688 dir_static.d_name[DIRSIZ] = '\0';
3689 dir_static.d_namlen = strlen (dir_static.d_name);
3690 dir_static.d_reclen = sizeof (struct direct)
3691 - MAXNAMLEN + 3
3692 + dir_static.d_namlen - dir_static.d_namlen % 4;
3693 return &dir_static; /* -> simulated structure */
3694 }
3695 #else /* VMS */
3696 dp = (struct dir$_name *) dirp->dd_buf;
3697 if (dirp->dd_loc == 0)
3698 dirp->dd_loc = (dp->dir$b_namecount&1) ? dp->dir$b_namecount + 1
3699 : dp->dir$b_namecount;
3700 dv = (struct dir$_version *)&dp->dir$t_name[dirp->dd_loc];
3701 dir_static.d_ino = dv->dir$w_fid_num;
3702 dir_static.d_namlen = dp->dir$b_namecount;
3703 dir_static.d_reclen = sizeof (struct direct)
3704 - MAXNAMLEN + 3
3705 + dir_static.d_namlen - dir_static.d_namlen % 4;
3706 strncpy (dir_static.d_name, dp->dir$t_name, dp->dir$b_namecount);
3707 dir_static.d_name[dir_static.d_namlen] = '\0';
3708 dirp->dd_loc = dirp->dd_size; /* only one record at a time */
3709 return &dir_static;
3710 #endif /* VMS */
3711 }
3712 }
3713
3714 #ifdef VMS
3715 /* readdirver is just like readdir except it returns all versions of a file
3716 as separate entries. */
3717
3718 /* ARGUSED */
3719 struct direct *
3720 readdirver (dirp)
3721 register DIR *dirp; /* stream from opendir */
3722 {
3723 register struct dir$_name *dp; /* -> directory data */
3724 register struct dir$_version *dv; /* -> version data */
3725
3726 if (dirp->dd_loc >= dirp->dd_size - sizeof (struct dir$_name))
3727 dirp->dd_loc = dirp->dd_size = 0;
3728
3729 if (dirp->dd_size == 0 /* refill buffer */
3730 && (dirp->dd_size = sys_read (dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ)) <= 0)
3731 return 0;
3732
3733 dp = (struct dir$_name *) dirp->dd_buf;
3734 if (dirp->dd_loc == 0)
3735 dirp->dd_loc = (dp->dir$b_namecount & 1) ? dp->dir$b_namecount + 1
3736 : dp->dir$b_namecount;
3737 dv = (struct dir$_version *) &dp->dir$t_name[dirp->dd_loc];
3738 strncpy (dir_static.d_name, dp->dir$t_name, dp->dir$b_namecount);
3739 sprintf (&dir_static.d_name[dp->dir$b_namecount], ";%d", dv->dir$w_version);
3740 dir_static.d_namlen = strlen (dir_static.d_name);
3741 dir_static.d_ino = dv->dir$w_fid_num;
3742 dir_static.d_reclen = sizeof (struct direct) - MAXNAMLEN + 3
3743 + dir_static.d_namlen - dir_static.d_namlen % 4;
3744 dirp->dd_loc = ((char *) (++dv) - dp->dir$t_name);
3745 return &dir_static;
3746 }
3747
3748 #endif /* VMS */
3749
3750 #endif /* NONSYSTEM_DIR_LIBRARY */
3751
3752 \f
3753 int
3754 set_file_times (filename, atime, mtime)
3755 const char *filename;
3756 EMACS_TIME atime, mtime;
3757 {
3758 #ifdef HAVE_UTIMES
3759 struct timeval tv[2];
3760 tv[0] = atime;
3761 tv[1] = mtime;
3762 return utimes (filename, tv);
3763 #else /* not HAVE_UTIMES */
3764 struct utimbuf utb;
3765 utb.actime = EMACS_SECS (atime);
3766 utb.modtime = EMACS_SECS (mtime);
3767 return utime (filename, &utb);
3768 #endif /* not HAVE_UTIMES */
3769 }
3770 \f
3771 /* mkdir and rmdir functions, for systems which don't have them. */
3772
3773 #ifndef HAVE_MKDIR
3774 /*
3775 * Written by Robert Rother, Mariah Corporation, August 1985.
3776 *
3777 * If you want it, it's yours. All I ask in return is that if you
3778 * figure out how to do this in a Bourne Shell script you send me
3779 * a copy.
3780 * sdcsvax!rmr or rmr@uscd
3781 *
3782 * Severely hacked over by John Gilmore to make a 4.2BSD compatible
3783 * subroutine. 11Mar86; hoptoad!gnu
3784 *
3785 * Modified by rmtodd@uokmax 6-28-87 -- when making an already existing dir,
3786 * subroutine didn't return EEXIST. It does now.
3787 */
3788
3789 /*
3790 * Make a directory.
3791 */
3792 #ifdef MKDIR_PROTOTYPE
3793 MKDIR_PROTOTYPE
3794 #else
3795 int
3796 mkdir (dpath, dmode)
3797 char *dpath;
3798 int dmode;
3799 #endif
3800 {
3801 int cpid, status, fd;
3802 struct stat statbuf;
3803
3804 if (stat (dpath, &statbuf) == 0)
3805 {
3806 errno = EEXIST; /* Stat worked, so it already exists */
3807 return -1;
3808 }
3809
3810 /* If stat fails for a reason other than non-existence, return error */
3811 if (errno != ENOENT)
3812 return -1;
3813
3814 synch_process_alive = 1;
3815 switch (cpid = fork ())
3816 {
3817
3818 case -1: /* Error in fork */
3819 return (-1); /* Errno is set already */
3820
3821 case 0: /* Child process */
3822 /*
3823 * Cheap hack to set mode of new directory. Since this
3824 * child process is going away anyway, we zap its umask.
3825 * FIXME, this won't suffice to set SUID, SGID, etc. on this
3826 * directory. Does anybody care?
3827 */
3828 status = umask (0); /* Get current umask */
3829 status = umask (status | (0777 & ~dmode)); /* Set for mkdir */
3830 fd = emacs_open ("/dev/null", O_RDWR, 0);
3831 if (fd >= 0)
3832 {
3833 dup2 (fd, 0);
3834 dup2 (fd, 1);
3835 dup2 (fd, 2);
3836 }
3837 execl ("/bin/mkdir", "mkdir", dpath, (char *) 0);
3838 _exit (-1); /* Can't exec /bin/mkdir */
3839
3840 default: /* Parent process */
3841 wait_for_termination (cpid);
3842 }
3843
3844 if (synch_process_death != 0 || synch_process_retcode != 0)
3845 {
3846 errno = EIO; /* We don't know why, but */
3847 return -1; /* /bin/mkdir failed */
3848 }
3849
3850 return 0;
3851 }
3852 #endif /* not HAVE_MKDIR */
3853
3854 #ifndef HAVE_RMDIR
3855 int
3856 rmdir (dpath)
3857 char *dpath;
3858 {
3859 int cpid, status, fd;
3860 struct stat statbuf;
3861
3862 if (stat (dpath, &statbuf) != 0)
3863 {
3864 /* Stat just set errno. We don't have to */
3865 return -1;
3866 }
3867
3868 synch_process_alive = 1;
3869 switch (cpid = fork ())
3870 {
3871
3872 case -1: /* Error in fork */
3873 return (-1); /* Errno is set already */
3874
3875 case 0: /* Child process */
3876 fd = emacs_open ("/dev/null", O_RDWR, 0);
3877 if (fd >= 0)
3878 {
3879 dup2 (fd, 0);
3880 dup2 (fd, 1);
3881 dup2 (fd, 2);
3882 }
3883 execl ("/bin/rmdir", "rmdir", dpath, (char *) 0);
3884 _exit (-1); /* Can't exec /bin/rmdir */
3885
3886 default: /* Parent process */
3887 wait_for_termination (cpid);
3888 }
3889
3890 if (synch_process_death != 0 || synch_process_retcode != 0)
3891 {
3892 errno = EIO; /* We don't know why, but */
3893 return -1; /* /bin/rmdir failed */
3894 }
3895
3896 return 0;
3897 }
3898 #endif /* !HAVE_RMDIR */
3899
3900
3901 \f
3902 /* Functions for VMS */
3903 #ifdef VMS
3904 #include "vms-pwd.h"
3905 #include <acldef.h>
3906 #include <chpdef.h>
3907 #include <jpidef.h>
3908
3909 /* Return as a string the VMS error string pertaining to STATUS.
3910 Reuses the same static buffer each time it is called. */
3911
3912 char *
3913 vmserrstr (status)
3914 int status; /* VMS status code */
3915 {
3916 int bufadr[2];
3917 short len;
3918 static char buf[257];
3919
3920 bufadr[0] = sizeof buf - 1;
3921 bufadr[1] = (int) buf;
3922 if (! (SYS$GETMSG (status, &len, bufadr, 0x1, 0) & 1))
3923 return "untranslatable VMS error status";
3924 buf[len] = '\0';
3925 return buf;
3926 }
3927
3928 #ifdef access
3929 #undef access
3930
3931 /* The following is necessary because 'access' emulation by VMS C (2.0) does
3932 * not work correctly. (It also doesn't work well in version 2.3.)
3933 */
3934
3935 #ifdef VMS4_4
3936
3937 #define DESCRIPTOR(name,string) struct dsc$descriptor_s name = \
3938 { strlen (string), DSC$K_DTYPE_T, DSC$K_CLASS_S, string }
3939
3940 typedef union {
3941 struct {
3942 unsigned short s_buflen;
3943 unsigned short s_code;
3944 char *s_bufadr;
3945 unsigned short *s_retlenadr;
3946 } s;
3947 int end;
3948 } item;
3949 #define buflen s.s_buflen
3950 #define code s.s_code
3951 #define bufadr s.s_bufadr
3952 #define retlenadr s.s_retlenadr
3953
3954 #define R_OK 4 /* test for read permission */
3955 #define W_OK 2 /* test for write permission */
3956 #define X_OK 1 /* test for execute (search) permission */
3957 #define F_OK 0 /* test for presence of file */
3958
3959 int
3960 sys_access (path, mode)
3961 char *path;
3962 int mode;
3963 {
3964 static char *user = NULL;
3965 char dir_fn[512];
3966
3967 /* translate possible directory spec into .DIR file name, so brain-dead
3968 * access can treat the directory like a file. */
3969 if (directory_file_name (path, dir_fn))
3970 path = dir_fn;
3971
3972 if (mode == F_OK)
3973 return access (path, mode);
3974 if (user == NULL && (user = (char *) getenv ("USER")) == NULL)
3975 return -1;
3976 {
3977 int stat;
3978 int flags;
3979 int acces;
3980 unsigned short int dummy;
3981 item itemlst[3];
3982 static int constant = ACL$C_FILE;
3983 DESCRIPTOR (path_desc, path);
3984 DESCRIPTOR (user_desc, user);
3985
3986 flags = 0;
3987 acces = 0;
3988 if ((mode & X_OK) && ((stat = access (path, mode)) < 0 || mode == X_OK))
3989 return stat;
3990 if (mode & R_OK)
3991 acces |= CHP$M_READ;
3992 if (mode & W_OK)
3993 acces |= CHP$M_WRITE;
3994 itemlst[0].buflen = sizeof (int);
3995 itemlst[0].code = CHP$_FLAGS;
3996 itemlst[0].bufadr = (char *) &flags;
3997 itemlst[0].retlenadr = &dummy;
3998 itemlst[1].buflen = sizeof (int);
3999 itemlst[1].code = CHP$_ACCESS;
4000 itemlst[1].bufadr = (char *) &acces;
4001 itemlst[1].retlenadr = &dummy;
4002 itemlst[2].end = CHP$_END;
4003 stat = SYS$CHECK_ACCESS (&constant, &path_desc, &user_desc, itemlst);
4004 return stat == SS$_NORMAL ? 0 : -1;
4005 }
4006 }
4007
4008 #else /* not VMS4_4 */
4009
4010 #include <prvdef.h>
4011 #define ACE$M_WRITE 2
4012 #define ACE$C_KEYID 1
4013
4014 static unsigned short memid, grpid;
4015 static unsigned int uic;
4016
4017 /* Called from init_sys_modes, so it happens not very often
4018 but at least each time Emacs is loaded. */
4019 void
4020 sys_access_reinit ()
4021 {
4022 uic = 0;
4023 }
4024
4025 int
4026 sys_access (filename, type)
4027 char * filename;
4028 int type;
4029 {
4030 struct FAB fab;
4031 struct XABPRO xab;
4032 int status, size, i, typecode, acl_controlled;
4033 unsigned int *aclptr, *aclend, aclbuf[60];
4034 union prvdef prvmask;
4035
4036 /* Get UIC and GRP values for protection checking. */
4037 if (uic == 0)
4038 {
4039 status = LIB$GETJPI (&JPI$_UIC, 0, 0, &uic, 0, 0);
4040 if (! (status & 1))
4041 return -1;
4042 memid = uic & 0xFFFF;
4043 grpid = uic >> 16;
4044 }
4045
4046 if (type != 2) /* not checking write access */
4047 return access (filename, type);
4048
4049 /* Check write protection. */
4050
4051 #define CHECKPRIV(bit) (prvmask.bit)
4052 #define WRITABLE(field) (! ((xab.xab$w_pro >> field) & XAB$M_NOWRITE))
4053
4054 /* Find privilege bits */
4055 status = SYS$SETPRV (0, 0, 0, prvmask);
4056 if (! (status & 1))
4057 error ("Unable to find privileges: %s", vmserrstr (status));
4058 if (CHECKPRIV (PRV$V_BYPASS))
4059 return 0; /* BYPASS enabled */
4060 fab = cc$rms_fab;
4061 fab.fab$b_fac = FAB$M_GET;
4062 fab.fab$l_fna = filename;
4063 fab.fab$b_fns = strlen (filename);
4064 fab.fab$l_xab = &xab;
4065 xab = cc$rms_xabpro;
4066 xab.xab$l_aclbuf = aclbuf;
4067 xab.xab$w_aclsiz = sizeof (aclbuf);
4068 status = SYS$OPEN (&fab, 0, 0);
4069 if (! (status & 1))
4070 return -1;
4071 SYS$CLOSE (&fab, 0, 0);
4072 /* Check system access */
4073 if (CHECKPRIV (PRV$V_SYSPRV) && WRITABLE (XAB$V_SYS))
4074 return 0;
4075 /* Check ACL entries, if any */
4076 acl_controlled = 0;
4077 if (xab.xab$w_acllen > 0)
4078 {
4079 aclptr = aclbuf;
4080 aclend = &aclbuf[xab.xab$w_acllen / 4];
4081 while (*aclptr && aclptr < aclend)
4082 {
4083 size = (*aclptr & 0xff) / 4;
4084 typecode = (*aclptr >> 8) & 0xff;
4085 if (typecode == ACE$C_KEYID)
4086 for (i = size - 1; i > 1; i--)
4087 if (aclptr[i] == uic)
4088 {
4089 acl_controlled = 1;
4090 if (aclptr[1] & ACE$M_WRITE)
4091 return 0; /* Write access through ACL */
4092 }
4093 aclptr = &aclptr[size];
4094 }
4095 if (acl_controlled) /* ACL specified, prohibits write access */
4096 return -1;
4097 }
4098 /* No ACL entries specified, check normal protection */
4099 if (WRITABLE (XAB$V_WLD)) /* World writable */
4100 return 0;
4101 if (WRITABLE (XAB$V_GRP) &&
4102 (unsigned short) (xab.xab$l_uic >> 16) == grpid)
4103 return 0; /* Group writable */
4104 if (WRITABLE (XAB$V_OWN) &&
4105 (xab.xab$l_uic & 0xFFFF) == memid)
4106 return 0; /* Owner writable */
4107
4108 return -1; /* Not writable */
4109 }
4110 #endif /* not VMS4_4 */
4111 #endif /* access */
4112
4113 static char vtbuf[NAM$C_MAXRSS+1];
4114
4115 /* translate a vms file spec to a unix path */
4116 char *
4117 sys_translate_vms (vfile)
4118 char * vfile;
4119 {
4120 char * p;
4121 char * targ;
4122
4123 if (!vfile)
4124 return 0;
4125
4126 targ = vtbuf;
4127
4128 /* leading device or logical name is a root directory */
4129 if (p = strchr (vfile, ':'))
4130 {
4131 *targ++ = '/';
4132 while (vfile < p)
4133 *targ++ = *vfile++;
4134 vfile++;
4135 *targ++ = '/';
4136 }
4137 p = vfile;
4138 if (*p == '[' || *p == '<')
4139 {
4140 while (*++vfile != *p + 2)
4141 switch (*vfile)
4142 {
4143 case '.':
4144 if (vfile[-1] == *p)
4145 *targ++ = '.';
4146 *targ++ = '/';
4147 break;
4148
4149 case '-':
4150 *targ++ = '.';
4151 *targ++ = '.';
4152 break;
4153
4154 default:
4155 *targ++ = *vfile;
4156 break;
4157 }
4158 vfile++;
4159 *targ++ = '/';
4160 }
4161 while (*vfile)
4162 *targ++ = *vfile++;
4163
4164 return vtbuf;
4165 }
4166
4167 static char utbuf[NAM$C_MAXRSS+1];
4168
4169 /* translate a unix path to a VMS file spec */
4170 char *
4171 sys_translate_unix (ufile)
4172 char * ufile;
4173 {
4174 int slash_seen = 0;
4175 char *p;
4176 char * targ;
4177
4178 if (!ufile)
4179 return 0;
4180
4181 targ = utbuf;
4182
4183 if (*ufile == '/')
4184 {
4185 ufile++;
4186 }
4187
4188 while (*ufile)
4189 {
4190 switch (*ufile)
4191 {
4192 case '/':
4193 if (slash_seen)
4194 if (index (&ufile[1], '/'))
4195 *targ++ = '.';
4196 else
4197 *targ++ = ']';
4198 else
4199 {
4200 *targ++ = ':';
4201 if (index (&ufile[1], '/'))
4202 *targ++ = '[';
4203 slash_seen = 1;
4204 }
4205 break;
4206
4207 case '.':
4208 if (strncmp (ufile, "./", 2) == 0)
4209 {
4210 if (!slash_seen)
4211 {
4212 *targ++ = '[';
4213 slash_seen = 1;
4214 }
4215 ufile++; /* skip the dot */
4216 if (index (&ufile[1], '/'))
4217 *targ++ = '.';
4218 else
4219 *targ++ = ']';
4220 }
4221 else if (strncmp (ufile, "../", 3) == 0)
4222 {
4223 if (!slash_seen)
4224 {
4225 *targ++ = '[';
4226 slash_seen = 1;
4227 }
4228 *targ++ = '-';
4229 ufile += 2; /* skip the dots */
4230 if (index (&ufile[1], '/'))
4231 *targ++ = '.';
4232 else
4233 *targ++ = ']';
4234 }
4235 else
4236 *targ++ = *ufile;
4237 break;
4238
4239 default:
4240 *targ++ = *ufile;
4241 break;
4242 }
4243 ufile++;
4244 }
4245 *targ = '\0';
4246
4247 return utbuf;
4248 }
4249
4250 char *
4251 getwd (pathname)
4252 char *pathname;
4253 {
4254 char *ptr, *val;
4255 extern char *getcwd ();
4256
4257 #define MAXPATHLEN 1024
4258
4259 ptr = xmalloc (MAXPATHLEN);
4260 val = getcwd (ptr, MAXPATHLEN);
4261 if (val == 0)
4262 {
4263 xfree (ptr);
4264 return val;
4265 }
4266 strcpy (pathname, ptr);
4267 xfree (ptr);
4268
4269 return pathname;
4270 }
4271
4272 int
4273 getppid ()
4274 {
4275 long item_code = JPI$_OWNER;
4276 unsigned long parent_id;
4277 int status;
4278
4279 if (((status = LIB$GETJPI (&item_code, 0, 0, &parent_id)) & 1) == 0)
4280 {
4281 errno = EVMSERR;
4282 vaxc$errno = status;
4283 return -1;
4284 }
4285 return parent_id;
4286 }
4287
4288 #undef getuid
4289 unsigned
4290 sys_getuid ()
4291 {
4292 return (getgid () << 16) | getuid ();
4293 }
4294
4295 #undef read
4296 int
4297 sys_read (fildes, buf, nbyte)
4298 int fildes;
4299 char *buf;
4300 unsigned int nbyte;
4301 {
4302 return read (fildes, buf, (nbyte < MAXIOSIZE ? nbyte : MAXIOSIZE));
4303 }
4304
4305 #if 0
4306 int
4307 sys_write (fildes, buf, nbyte)
4308 int fildes;
4309 char *buf;
4310 unsigned int nbyte;
4311 {
4312 register int nwrote, rtnval = 0;
4313
4314 while (nbyte > MAXIOSIZE && (nwrote = write (fildes, buf, MAXIOSIZE)) > 0) {
4315 nbyte -= nwrote;
4316 buf += nwrote;
4317 rtnval += nwrote;
4318 }
4319 if (nwrote < 0)
4320 return rtnval ? rtnval : -1;
4321 if ((nwrote = write (fildes, buf, nbyte)) < 0)
4322 return rtnval ? rtnval : -1;
4323 return (rtnval + nwrote);
4324 }
4325 #endif /* 0 */
4326
4327 /*
4328 * VAX/VMS VAX C RTL really loses. It insists that records
4329 * end with a newline (carriage return) character, and if they
4330 * don't it adds one (nice of it isn't it!)
4331 *
4332 * Thus we do this stupidity below.
4333 */
4334
4335 #undef write
4336 int
4337 sys_write (fildes, buf, nbytes)
4338 int fildes;
4339 char *buf;
4340 unsigned int nbytes;
4341 {
4342 register char *p;
4343 register char *e;
4344 int sum = 0;
4345 struct stat st;
4346
4347 fstat (fildes, &st);
4348 p = buf;
4349 while (nbytes > 0)
4350 {
4351 int len, retval;
4352
4353 /* Handle fixed-length files with carriage control. */
4354 if (st.st_fab_rfm == FAB$C_FIX
4355 && ((st.st_fab_rat & (FAB$M_FTN | FAB$M_CR)) != 0))
4356 {
4357 len = st.st_fab_mrs;
4358 retval = write (fildes, p, min (len, nbytes));
4359 if (retval != len)
4360 return -1;
4361 retval++; /* This skips the implied carriage control */
4362 }
4363 else
4364 {
4365 e = p + min (MAXIOSIZE, nbytes) - 1;
4366 while (*e != '\n' && e > p) e--;
4367 if (p == e) /* Ok.. so here we add a newline... sigh. */
4368 e = p + min (MAXIOSIZE, nbytes) - 1;
4369 len = e + 1 - p;
4370 retval = write (fildes, p, len);
4371 if (retval != len)
4372 return -1;
4373 }
4374 p += retval;
4375 sum += retval;
4376 nbytes -= retval;
4377 }
4378 return sum;
4379 }
4380
4381 /* Create file NEW copying its attributes from file OLD. If
4382 OLD is 0 or does not exist, create based on the value of
4383 vms_stmlf_recfm. */
4384
4385 /* Protection value the file should ultimately have.
4386 Set by create_copy_attrs, and use by rename_sansversions. */
4387 static unsigned short int fab_final_pro;
4388
4389 int
4390 creat_copy_attrs (old, new)
4391 char *old, *new;
4392 {
4393 struct FAB fab = cc$rms_fab;
4394 struct XABPRO xabpro;
4395 char aclbuf[256]; /* Choice of size is arbitrary. See below. */
4396 extern int vms_stmlf_recfm;
4397
4398 if (old)
4399 {
4400 fab.fab$b_fac = FAB$M_GET;
4401 fab.fab$l_fna = old;
4402 fab.fab$b_fns = strlen (old);
4403 fab.fab$l_xab = (char *) &xabpro;
4404 xabpro = cc$rms_xabpro;
4405 xabpro.xab$l_aclbuf = aclbuf;
4406 xabpro.xab$w_aclsiz = sizeof aclbuf;
4407 /* Call $OPEN to fill in the fab & xabpro fields. */
4408 if (SYS$OPEN (&fab, 0, 0) & 1)
4409 {
4410 SYS$CLOSE (&fab, 0, 0);
4411 fab.fab$l_alq = 0; /* zero the allocation quantity */
4412 if (xabpro.xab$w_acllen > 0)
4413 {
4414 if (xabpro.xab$w_acllen > sizeof aclbuf)
4415 /* If the acl buffer was too short, redo open with longer one.
4416 Wouldn't need to do this if there were some system imposed
4417 limit on the size of an ACL, but I can't find any such. */
4418 {
4419 xabpro.xab$l_aclbuf = (char *) alloca (xabpro.xab$w_acllen);
4420 xabpro.xab$w_aclsiz = xabpro.xab$w_acllen;
4421 if (SYS$OPEN (&fab, 0, 0) & 1)
4422 SYS$CLOSE (&fab, 0, 0);
4423 else
4424 old = 0;
4425 }
4426 }
4427 else
4428 xabpro.xab$l_aclbuf = 0;
4429 }
4430 else
4431 old = 0;
4432 }
4433 fab.fab$l_fna = new;
4434 fab.fab$b_fns = strlen (new);
4435 if (!old)
4436 {
4437 fab.fab$l_xab = 0;
4438 fab.fab$b_rfm = vms_stmlf_recfm ? FAB$C_STMLF : FAB$C_VAR;
4439 fab.fab$b_rat = FAB$M_CR;
4440 }
4441
4442 /* Set the file protections such that we will be able to manipulate
4443 this file. Once we are done writing and renaming it, we will set
4444 the protections back. */
4445 if (old)
4446 fab_final_pro = xabpro.xab$w_pro;
4447 else
4448 SYS$SETDFPROT (0, &fab_final_pro);
4449 xabpro.xab$w_pro &= 0xff0f; /* set O:rewd for now. This is set back later. */
4450
4451 /* Create the new file with either default attrs or attrs copied
4452 from old file. */
4453 if (!(SYS$CREATE (&fab, 0, 0) & 1))
4454 return -1;
4455 SYS$CLOSE (&fab, 0, 0);
4456 /* As this is a "replacement" for creat, return a file descriptor
4457 opened for writing. */
4458 return open (new, O_WRONLY);
4459 }
4460
4461 #ifdef creat
4462 #undef creat
4463 #include <varargs.h>
4464 #ifdef __GNUC__
4465 #ifndef va_count
4466 #define va_count(X) ((X) = *(((int *) &(va_alist)) - 1))
4467 #endif
4468 #endif
4469
4470 int
4471 sys_creat (va_alist)
4472 va_dcl
4473 {
4474 va_list list_incrementer;
4475 char *name;
4476 int mode;
4477 int rfd; /* related file descriptor */
4478 int fd; /* Our new file descriptor */
4479 int count;
4480 struct stat st_buf;
4481 char rfm[12];
4482 char rat[15];
4483 char mrs[13];
4484 char fsz[13];
4485 extern int vms_stmlf_recfm;
4486
4487 va_count (count);
4488 va_start (list_incrementer);
4489 name = va_arg (list_incrementer, char *);
4490 mode = va_arg (list_incrementer, int);
4491 if (count > 2)
4492 rfd = va_arg (list_incrementer, int);
4493 va_end (list_incrementer);
4494 if (count > 2)
4495 {
4496 /* Use information from the related file descriptor to set record
4497 format of the newly created file. */
4498 fstat (rfd, &st_buf);
4499 switch (st_buf.st_fab_rfm)
4500 {
4501 case FAB$C_FIX:
4502 strcpy (rfm, "rfm = fix");
4503 sprintf (mrs, "mrs = %d", st_buf.st_fab_mrs);
4504 strcpy (rat, "rat = ");
4505 if (st_buf.st_fab_rat & FAB$M_CR)
4506 strcat (rat, "cr");
4507 else if (st_buf.st_fab_rat & FAB$M_FTN)
4508 strcat (rat, "ftn");
4509 else if (st_buf.st_fab_rat & FAB$M_PRN)
4510 strcat (rat, "prn");
4511 if (st_buf.st_fab_rat & FAB$M_BLK)
4512 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4513 strcat (rat, ", blk");
4514 else
4515 strcat (rat, "blk");
4516 return creat (name, 0, rfm, rat, mrs);
4517
4518 case FAB$C_VFC:
4519 strcpy (rfm, "rfm = vfc");
4520 sprintf (fsz, "fsz = %d", st_buf.st_fab_fsz);
4521 strcpy (rat, "rat = ");
4522 if (st_buf.st_fab_rat & FAB$M_CR)
4523 strcat (rat, "cr");
4524 else if (st_buf.st_fab_rat & FAB$M_FTN)
4525 strcat (rat, "ftn");
4526 else if (st_buf.st_fab_rat & FAB$M_PRN)
4527 strcat (rat, "prn");
4528 if (st_buf.st_fab_rat & FAB$M_BLK)
4529 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4530 strcat (rat, ", blk");
4531 else
4532 strcat (rat, "blk");
4533 return creat (name, 0, rfm, rat, fsz);
4534
4535 case FAB$C_STM:
4536 strcpy (rfm, "rfm = stm");
4537 break;
4538
4539 case FAB$C_STMCR:
4540 strcpy (rfm, "rfm = stmcr");
4541 break;
4542
4543 case FAB$C_STMLF:
4544 strcpy (rfm, "rfm = stmlf");
4545 break;
4546
4547 case FAB$C_UDF:
4548 strcpy (rfm, "rfm = udf");
4549 break;
4550
4551 case FAB$C_VAR:
4552 strcpy (rfm, "rfm = var");
4553 break;
4554 }
4555 strcpy (rat, "rat = ");
4556 if (st_buf.st_fab_rat & FAB$M_CR)
4557 strcat (rat, "cr");
4558 else if (st_buf.st_fab_rat & FAB$M_FTN)
4559 strcat (rat, "ftn");
4560 else if (st_buf.st_fab_rat & FAB$M_PRN)
4561 strcat (rat, "prn");
4562 if (st_buf.st_fab_rat & FAB$M_BLK)
4563 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4564 strcat (rat, ", blk");
4565 else
4566 strcat (rat, "blk");
4567 }
4568 else
4569 {
4570 strcpy (rfm, vms_stmlf_recfm ? "rfm = stmlf" : "rfm=var");
4571 strcpy (rat, "rat=cr");
4572 }
4573 /* Until the VAX C RTL fixes the many bugs with modes, always use
4574 mode 0 to get the user's default protection. */
4575 fd = creat (name, 0, rfm, rat);
4576 if (fd < 0 && errno == EEXIST)
4577 {
4578 if (unlink (name) < 0)
4579 report_file_error ("delete", build_string (name));
4580 fd = creat (name, 0, rfm, rat);
4581 }
4582 return fd;
4583 }
4584 #endif /* creat */
4585
4586 /* fwrite to stdout is S L O W. Speed it up by using fputc...*/
4587 int
4588 sys_fwrite (ptr, size, num, fp)
4589 register char * ptr;
4590 FILE * fp;
4591 {
4592 register int tot = num * size;
4593
4594 while (tot--)
4595 fputc (*ptr++, fp);
4596 return num;
4597 }
4598
4599 /*
4600 * The VMS C library routine creat actually creates a new version of an
4601 * existing file rather than truncating the old version. There are times
4602 * when this is not the desired behavior, for instance, when writing an
4603 * auto save file (you only want one version), or when you don't have
4604 * write permission in the directory containing the file (but the file
4605 * itself is writable). Hence this routine, which is equivalent to
4606 * "close (creat (fn, 0));" on Unix if fn already exists.
4607 */
4608 int
4609 vms_truncate (fn)
4610 char *fn;
4611 {
4612 struct FAB xfab = cc$rms_fab;
4613 struct RAB xrab = cc$rms_rab;
4614 int status;
4615
4616 xfab.fab$l_fop = FAB$M_TEF; /* free allocated but unused blocks on close */
4617 xfab.fab$b_fac = FAB$M_TRN | FAB$M_GET; /* allow truncate and get access */
4618 xfab.fab$b_shr = FAB$M_NIL; /* allow no sharing - file must be locked */
4619 xfab.fab$l_fna = fn;
4620 xfab.fab$b_fns = strlen (fn);
4621 xfab.fab$l_dna = ";0"; /* default to latest version of the file */
4622 xfab.fab$b_dns = 2;
4623 xrab.rab$l_fab = &xfab;
4624
4625 /* This gibberish opens the file, positions to the first record, and
4626 deletes all records from there until the end of file. */
4627 if ((SYS$OPEN (&xfab) & 01) == 01)
4628 {
4629 if ((SYS$CONNECT (&xrab) & 01) == 01 &&
4630 (SYS$FIND (&xrab) & 01) == 01 &&
4631 (SYS$TRUNCATE (&xrab) & 01) == 01)
4632 status = 0;
4633 else
4634 status = -1;
4635 }
4636 else
4637 status = -1;
4638 SYS$CLOSE (&xfab);
4639 return status;
4640 }
4641
4642 /* Define this symbol to actually read SYSUAF.DAT. This requires either
4643 SYSPRV or a readable SYSUAF.DAT. */
4644
4645 #ifdef READ_SYSUAF
4646 /*
4647 * getuaf.c
4648 *
4649 * Routine to read the VMS User Authorization File and return
4650 * a specific user's record.
4651 */
4652
4653 static struct UAF retuaf;
4654
4655 struct UAF *
4656 get_uaf_name (uname)
4657 char * uname;
4658 {
4659 register status;
4660 struct FAB uaf_fab;
4661 struct RAB uaf_rab;
4662
4663 uaf_fab = cc$rms_fab;
4664 uaf_rab = cc$rms_rab;
4665 /* initialize fab fields */
4666 uaf_fab.fab$l_fna = "SYS$SYSTEM:SYSUAF.DAT";
4667 uaf_fab.fab$b_fns = 21;
4668 uaf_fab.fab$b_fac = FAB$M_GET;
4669 uaf_fab.fab$b_org = FAB$C_IDX;
4670 uaf_fab.fab$b_shr = FAB$M_GET|FAB$M_PUT|FAB$M_UPD|FAB$M_DEL;
4671 /* initialize rab fields */
4672 uaf_rab.rab$l_fab = &uaf_fab;
4673 /* open the User Authorization File */
4674 status = SYS$OPEN (&uaf_fab);
4675 if (!(status&1))
4676 {
4677 errno = EVMSERR;
4678 vaxc$errno = status;
4679 return 0;
4680 }
4681 status = SYS$CONNECT (&uaf_rab);
4682 if (!(status&1))
4683 {
4684 errno = EVMSERR;
4685 vaxc$errno = status;
4686 return 0;
4687 }
4688 /* read the requested record - index is in uname */
4689 uaf_rab.rab$l_kbf = uname;
4690 uaf_rab.rab$b_ksz = strlen (uname);
4691 uaf_rab.rab$b_rac = RAB$C_KEY;
4692 uaf_rab.rab$l_ubf = (char *)&retuaf;
4693 uaf_rab.rab$w_usz = sizeof retuaf;
4694 status = SYS$GET (&uaf_rab);
4695 if (!(status&1))
4696 {
4697 errno = EVMSERR;
4698 vaxc$errno = status;
4699 return 0;
4700 }
4701 /* close the User Authorization File */
4702 status = SYS$DISCONNECT (&uaf_rab);
4703 if (!(status&1))
4704 {
4705 errno = EVMSERR;
4706 vaxc$errno = status;
4707 return 0;
4708 }
4709 status = SYS$CLOSE (&uaf_fab);
4710 if (!(status&1))
4711 {
4712 errno = EVMSERR;
4713 vaxc$errno = status;
4714 return 0;
4715 }
4716 return &retuaf;
4717 }
4718
4719 struct UAF *
4720 get_uaf_uic (uic)
4721 unsigned long uic;
4722 {
4723 register status;
4724 struct FAB uaf_fab;
4725 struct RAB uaf_rab;
4726
4727 uaf_fab = cc$rms_fab;
4728 uaf_rab = cc$rms_rab;
4729 /* initialize fab fields */
4730 uaf_fab.fab$l_fna = "SYS$SYSTEM:SYSUAF.DAT";
4731 uaf_fab.fab$b_fns = 21;
4732 uaf_fab.fab$b_fac = FAB$M_GET;
4733 uaf_fab.fab$b_org = FAB$C_IDX;
4734 uaf_fab.fab$b_shr = FAB$M_GET|FAB$M_PUT|FAB$M_UPD|FAB$M_DEL;
4735 /* initialize rab fields */
4736 uaf_rab.rab$l_fab = &uaf_fab;
4737 /* open the User Authorization File */
4738 status = SYS$OPEN (&uaf_fab);
4739 if (!(status&1))
4740 {
4741 errno = EVMSERR;
4742 vaxc$errno = status;
4743 return 0;
4744 }
4745 status = SYS$CONNECT (&uaf_rab);
4746 if (!(status&1))
4747 {
4748 errno = EVMSERR;
4749 vaxc$errno = status;
4750 return 0;
4751 }
4752 /* read the requested record - index is in uic */
4753 uaf_rab.rab$b_krf = 1; /* 1st alternate key */
4754 uaf_rab.rab$l_kbf = (char *) &uic;
4755 uaf_rab.rab$b_ksz = sizeof uic;
4756 uaf_rab.rab$b_rac = RAB$C_KEY;
4757 uaf_rab.rab$l_ubf = (char *)&retuaf;
4758 uaf_rab.rab$w_usz = sizeof retuaf;
4759 status = SYS$GET (&uaf_rab);
4760 if (!(status&1))
4761 {
4762 errno = EVMSERR;
4763 vaxc$errno = status;
4764 return 0;
4765 }
4766 /* close the User Authorization File */
4767 status = SYS$DISCONNECT (&uaf_rab);
4768 if (!(status&1))
4769 {
4770 errno = EVMSERR;
4771 vaxc$errno = status;
4772 return 0;
4773 }
4774 status = SYS$CLOSE (&uaf_fab);
4775 if (!(status&1))
4776 {
4777 errno = EVMSERR;
4778 vaxc$errno = status;
4779 return 0;
4780 }
4781 return &retuaf;
4782 }
4783
4784 static struct passwd retpw;
4785
4786 struct passwd *
4787 cnv_uaf_pw (up)
4788 struct UAF * up;
4789 {
4790 char * ptr;
4791
4792 /* copy these out first because if the username is 32 chars, the next
4793 section will overwrite the first byte of the UIC */
4794 retpw.pw_uid = up->uaf$w_mem;
4795 retpw.pw_gid = up->uaf$w_grp;
4796
4797 /* I suppose this is not the best style, to possibly overwrite one
4798 byte beyond the end of the field, but what the heck... */
4799 ptr = &up->uaf$t_username[UAF$S_USERNAME];
4800 while (ptr[-1] == ' ')
4801 ptr--;
4802 *ptr = '\0';
4803 strcpy (retpw.pw_name, up->uaf$t_username);
4804
4805 /* the rest of these are counted ascii strings */
4806 strncpy (retpw.pw_gecos, &up->uaf$t_owner[1], up->uaf$t_owner[0]);
4807 retpw.pw_gecos[up->uaf$t_owner[0]] = '\0';
4808 strncpy (retpw.pw_dir, &up->uaf$t_defdev[1], up->uaf$t_defdev[0]);
4809 retpw.pw_dir[up->uaf$t_defdev[0]] = '\0';
4810 strncat (retpw.pw_dir, &up->uaf$t_defdir[1], up->uaf$t_defdir[0]);
4811 retpw.pw_dir[up->uaf$t_defdev[0] + up->uaf$t_defdir[0]] = '\0';
4812 strncpy (retpw.pw_shell, &up->uaf$t_defcli[1], up->uaf$t_defcli[0]);
4813 retpw.pw_shell[up->uaf$t_defcli[0]] = '\0';
4814
4815 return &retpw;
4816 }
4817 #else /* not READ_SYSUAF */
4818 static struct passwd retpw;
4819 #endif /* not READ_SYSUAF */
4820
4821 struct passwd *
4822 getpwnam (name)
4823 char * name;
4824 {
4825 #ifdef READ_SYSUAF
4826 struct UAF *up;
4827 #else
4828 char * user;
4829 char * dir;
4830 unsigned char * full;
4831 #endif /* READ_SYSUAF */
4832 char *ptr = name;
4833
4834 while (*ptr)
4835 {
4836 if ('a' <= *ptr && *ptr <= 'z')
4837 *ptr -= 040;
4838 ptr++;
4839 }
4840 #ifdef READ_SYSUAF
4841 if (!(up = get_uaf_name (name)))
4842 return 0;
4843 return cnv_uaf_pw (up);
4844 #else
4845 if (strcmp (name, getenv ("USER")) == 0)
4846 {
4847 retpw.pw_uid = getuid ();
4848 retpw.pw_gid = getgid ();
4849 strcpy (retpw.pw_name, name);
4850 if (full = egetenv ("FULLNAME"))
4851 strcpy (retpw.pw_gecos, full);
4852 else
4853 *retpw.pw_gecos = '\0';
4854 strcpy (retpw.pw_dir, egetenv ("HOME"));
4855 *retpw.pw_shell = '\0';
4856 return &retpw;
4857 }
4858 else
4859 return 0;
4860 #endif /* not READ_SYSUAF */
4861 }
4862
4863 struct passwd *
4864 getpwuid (uid)
4865 unsigned long uid;
4866 {
4867 #ifdef READ_SYSUAF
4868 struct UAF * up;
4869
4870 if (!(up = get_uaf_uic (uid)))
4871 return 0;
4872 return cnv_uaf_pw (up);
4873 #else
4874 if (uid == sys_getuid ())
4875 return getpwnam (egetenv ("USER"));
4876 else
4877 return 0;
4878 #endif /* not READ_SYSUAF */
4879 }
4880
4881 /* return total address space available to the current process. This is
4882 the sum of the current p0 size, p1 size and free page table entries
4883 available. */
4884 int
4885 vlimit ()
4886 {
4887 int item_code;
4888 unsigned long free_pages;
4889 unsigned long frep0va;
4890 unsigned long frep1va;
4891 register status;
4892
4893 item_code = JPI$_FREPTECNT;
4894 if (((status = LIB$GETJPI (&item_code, 0, 0, &free_pages)) & 1) == 0)
4895 {
4896 errno = EVMSERR;
4897 vaxc$errno = status;
4898 return -1;
4899 }
4900 free_pages *= 512;
4901
4902 item_code = JPI$_FREP0VA;
4903 if (((status = LIB$GETJPI (&item_code, 0, 0, &frep0va)) & 1) == 0)
4904 {
4905 errno = EVMSERR;
4906 vaxc$errno = status;
4907 return -1;
4908 }
4909 item_code = JPI$_FREP1VA;
4910 if (((status = LIB$GETJPI (&item_code, 0, 0, &frep1va)) & 1) == 0)
4911 {
4912 errno = EVMSERR;
4913 vaxc$errno = status;
4914 return -1;
4915 }
4916
4917 return free_pages + frep0va + (0x7fffffff - frep1va);
4918 }
4919
4920 int
4921 define_logical_name (varname, string)
4922 char *varname;
4923 char *string;
4924 {
4925 struct dsc$descriptor_s strdsc =
4926 {strlen (string), DSC$K_DTYPE_T, DSC$K_CLASS_S, string};
4927 struct dsc$descriptor_s envdsc =
4928 {strlen (varname), DSC$K_DTYPE_T, DSC$K_CLASS_S, varname};
4929 struct dsc$descriptor_s lnmdsc =
4930 {7, DSC$K_DTYPE_T, DSC$K_CLASS_S, "LNM$JOB"};
4931
4932 return LIB$SET_LOGICAL (&envdsc, &strdsc, &lnmdsc, 0, 0);
4933 }
4934
4935 int
4936 delete_logical_name (varname)
4937 char *varname;
4938 {
4939 struct dsc$descriptor_s envdsc =
4940 {strlen (varname), DSC$K_DTYPE_T, DSC$K_CLASS_S, varname};
4941 struct dsc$descriptor_s lnmdsc =
4942 {7, DSC$K_DTYPE_T, DSC$K_CLASS_S, "LNM$JOB"};
4943
4944 return LIB$DELETE_LOGICAL (&envdsc, &lnmdsc);
4945 }
4946
4947 int
4948 ulimit ()
4949 {
4950 return 0;
4951 }
4952
4953 int
4954 setpgrp ()
4955 {
4956 return 0;
4957 }
4958
4959 int
4960 execvp ()
4961 {
4962 error ("execvp system call not implemented");
4963 return -1;
4964 }
4965
4966 int
4967 rename (from, to)
4968 char *from, *to;
4969 {
4970 int status;
4971 struct FAB from_fab = cc$rms_fab, to_fab = cc$rms_fab;
4972 struct NAM from_nam = cc$rms_nam, to_nam = cc$rms_nam;
4973 char from_esn[NAM$C_MAXRSS];
4974 char to_esn[NAM$C_MAXRSS];
4975
4976 from_fab.fab$l_fna = from;
4977 from_fab.fab$b_fns = strlen (from);
4978 from_fab.fab$l_nam = &from_nam;
4979 from_fab.fab$l_fop = FAB$M_NAM;
4980
4981 from_nam.nam$l_esa = from_esn;
4982 from_nam.nam$b_ess = sizeof from_esn;
4983
4984 to_fab.fab$l_fna = to;
4985 to_fab.fab$b_fns = strlen (to);
4986 to_fab.fab$l_nam = &to_nam;
4987 to_fab.fab$l_fop = FAB$M_NAM;
4988
4989 to_nam.nam$l_esa = to_esn;
4990 to_nam.nam$b_ess = sizeof to_esn;
4991
4992 status = SYS$RENAME (&from_fab, 0, 0, &to_fab);
4993
4994 if (status & 1)
4995 return 0;
4996 else
4997 {
4998 if (status == RMS$_DEV)
4999 errno = EXDEV;
5000 else
5001 errno = EVMSERR;
5002 vaxc$errno = status;
5003 return -1;
5004 }
5005 }
5006
5007 /* This function renames a file like `rename', but it strips
5008 the version number from the "to" filename, such that the "to" file is
5009 will always be a new version. It also sets the file protection once it is
5010 finished. The protection that we will use is stored in fab_final_pro,
5011 and was set when we did a creat_copy_attrs to create the file that we
5012 are renaming.
5013
5014 We could use the chmod function, but Eunichs uses 3 bits per user category
5015 to describe the protection, and VMS uses 4 (write and delete are separate
5016 bits). To maintain portability, the VMS implementation of `chmod' wires
5017 the W and D bits together. */
5018
5019
5020 static struct fibdef fib; /* We need this initialized to zero */
5021 char vms_file_written[NAM$C_MAXRSS];
5022
5023 int
5024 rename_sans_version (from,to)
5025 char *from, *to;
5026 {
5027 short int chan;
5028 int stat;
5029 short int iosb[4];
5030 int status;
5031 struct FAB to_fab = cc$rms_fab;
5032 struct NAM to_nam = cc$rms_nam;
5033 struct dsc$descriptor fib_d ={sizeof (fib),0,0,(char*) &fib};
5034 struct dsc$descriptor fib_attr[2]
5035 = {{sizeof (fab_final_pro),ATR$C_FPRO,0,(char*) &fab_final_pro},{0,0,0,0}};
5036 char to_esn[NAM$C_MAXRSS];
5037
5038 $DESCRIPTOR (disk,to_esn);
5039
5040 to_fab.fab$l_fna = to;
5041 to_fab.fab$b_fns = strlen (to);
5042 to_fab.fab$l_nam = &to_nam;
5043 to_fab.fab$l_fop = FAB$M_NAM;
5044
5045 to_nam.nam$l_esa = to_esn;
5046 to_nam.nam$b_ess = sizeof to_esn;
5047
5048 status = SYS$PARSE (&to_fab, 0, 0); /* figure out the full file name */
5049
5050 if (to_nam.nam$l_fnb && NAM$M_EXP_VER)
5051 *(to_nam.nam$l_ver) = '\0';
5052
5053 stat = rename (from, to_esn);
5054 if (stat < 0)
5055 return stat;
5056
5057 strcpy (vms_file_written, to_esn);
5058
5059 to_fab.fab$l_fna = vms_file_written; /* this points to the versionless name */
5060 to_fab.fab$b_fns = strlen (vms_file_written);
5061
5062 /* Now set the file protection to the correct value */
5063 SYS$OPEN (&to_fab, 0, 0); /* This fills in the nam$w_fid fields */
5064
5065 /* Copy these fields into the fib */
5066 fib.fib$r_fid_overlay.fib$w_fid[0] = to_nam.nam$w_fid[0];
5067 fib.fib$r_fid_overlay.fib$w_fid[1] = to_nam.nam$w_fid[1];
5068 fib.fib$r_fid_overlay.fib$w_fid[2] = to_nam.nam$w_fid[2];
5069
5070 SYS$CLOSE (&to_fab, 0, 0);
5071
5072 stat = SYS$ASSIGN (&disk, &chan, 0, 0); /* open a channel to the disk */
5073 if (!stat)
5074 LIB$SIGNAL (stat);
5075 stat = SYS$QIOW (0, chan, IO$_MODIFY, iosb, 0, 0, &fib_d,
5076 0, 0, 0, &fib_attr, 0);
5077 if (!stat)
5078 LIB$SIGNAL (stat);
5079 stat = SYS$DASSGN (chan);
5080 if (!stat)
5081 LIB$SIGNAL (stat);
5082 strcpy (vms_file_written, to_esn); /* We will write this to the terminal*/
5083 return 0;
5084 }
5085
5086 int
5087 link (file, new)
5088 char * file, * new;
5089 {
5090 register status;
5091 struct FAB fab;
5092 struct NAM nam;
5093 unsigned short fid[3];
5094 char esa[NAM$C_MAXRSS];
5095
5096 fab = cc$rms_fab;
5097 fab.fab$l_fop = FAB$M_OFP;
5098 fab.fab$l_fna = file;
5099 fab.fab$b_fns = strlen (file);
5100 fab.fab$l_nam = &nam;
5101
5102 nam = cc$rms_nam;
5103 nam.nam$l_esa = esa;
5104 nam.nam$b_ess = NAM$C_MAXRSS;
5105
5106 status = SYS$PARSE (&fab);
5107 if ((status & 1) == 0)
5108 {
5109 errno = EVMSERR;
5110 vaxc$errno = status;
5111 return -1;
5112 }
5113 status = SYS$SEARCH (&fab);
5114 if ((status & 1) == 0)
5115 {
5116 errno = EVMSERR;
5117 vaxc$errno = status;
5118 return -1;
5119 }
5120
5121 fid[0] = nam.nam$w_fid[0];
5122 fid[1] = nam.nam$w_fid[1];
5123 fid[2] = nam.nam$w_fid[2];
5124
5125 fab.fab$l_fna = new;
5126 fab.fab$b_fns = strlen (new);
5127
5128 status = SYS$PARSE (&fab);
5129 if ((status & 1) == 0)
5130 {
5131 errno = EVMSERR;
5132 vaxc$errno = status;
5133 return -1;
5134 }
5135
5136 nam.nam$w_fid[0] = fid[0];
5137 nam.nam$w_fid[1] = fid[1];
5138 nam.nam$w_fid[2] = fid[2];
5139
5140 nam.nam$l_esa = nam.nam$l_name;
5141 nam.nam$b_esl = nam.nam$b_name + nam.nam$b_type + nam.nam$b_ver;
5142
5143 status = SYS$ENTER (&fab);
5144 if ((status & 1) == 0)
5145 {
5146 errno = EVMSERR;
5147 vaxc$errno = status;
5148 return -1;
5149 }
5150
5151 return 0;
5152 }
5153
5154 void
5155 croak (badfunc)
5156 char *badfunc;
5157 {
5158 printf ("%s not yet implemented\r\n", badfunc);
5159 reset_all_sys_modes ();
5160 exit (1);
5161 }
5162
5163 long
5164 random ()
5165 {
5166 /* Arrange to return a range centered on zero. */
5167 return rand () - (1 << 30);
5168 }
5169
5170 void
5171 srandom (seed)
5172 {
5173 srand (seed);
5174 }
5175 #endif /* VMS */
5176 \f
5177 #ifdef AIXHFT
5178
5179 /* Called from init_sys_modes. */
5180 void
5181 hft_init (struct tty_display_info *tty_out)
5182 {
5183 int junk;
5184
5185 /* If we're not on an HFT we shouldn't do any of this. We determine
5186 if we are on an HFT by trying to get an HFT error code. If this
5187 call fails, we're not on an HFT. */
5188 #ifdef IBMR2AIX
5189 if (ioctl (0, HFQERROR, &junk) < 0)
5190 return;
5191 #else /* not IBMR2AIX */
5192 if (ioctl (0, HFQEIO, 0) < 0)
5193 return;
5194 #endif /* not IBMR2AIX */
5195
5196 /* On AIX the default hft keyboard mapping uses backspace rather than delete
5197 as the rubout key's ASCII code. Here this is changed. The bug is that
5198 there's no way to determine the old mapping, so in reset_sys_modes
5199 we need to assume that the normal map had been present. Of course, this
5200 code also doesn't help if on a terminal emulator which doesn't understand
5201 HFT VTD's. */
5202 {
5203 struct hfbuf buf;
5204 struct hfkeymap keymap;
5205
5206 buf.hf_bufp = (char *)&keymap;
5207 buf.hf_buflen = sizeof (keymap);
5208 keymap.hf_nkeys = 2;
5209 keymap.hfkey[0].hf_kpos = 15;
5210 keymap.hfkey[0].hf_kstate = HFMAPCHAR | HFSHFNONE;
5211 #ifdef IBMR2AIX
5212 keymap.hfkey[0].hf_keyidh = '<';
5213 #else /* not IBMR2AIX */
5214 keymap.hfkey[0].hf_page = '<';
5215 #endif /* not IBMR2AIX */
5216 keymap.hfkey[0].hf_char = 127;
5217 keymap.hfkey[1].hf_kpos = 15;
5218 keymap.hfkey[1].hf_kstate = HFMAPCHAR | HFSHFSHFT;
5219 #ifdef IBMR2AIX
5220 keymap.hfkey[1].hf_keyidh = '<';
5221 #else /* not IBMR2AIX */
5222 keymap.hfkey[1].hf_page = '<';
5223 #endif /* not IBMR2AIX */
5224 keymap.hfkey[1].hf_char = 127;
5225 hftctl (0, HFSKBD, &buf);
5226 }
5227 }
5228
5229 /* Reset the rubout key to backspace. */
5230
5231 void
5232 hft_reset (struct tty_display_info *tty_out)
5233 {
5234 struct hfbuf buf;
5235 struct hfkeymap keymap;
5236 int junk;
5237
5238 #ifdef IBMR2AIX
5239 if (ioctl (0, HFQERROR, &junk) < 0)
5240 return;
5241 #else /* not IBMR2AIX */
5242 if (ioctl (0, HFQEIO, 0) < 0)
5243 return;
5244 #endif /* not IBMR2AIX */
5245
5246 buf.hf_bufp = (char *)&keymap;
5247 buf.hf_buflen = sizeof (keymap);
5248 keymap.hf_nkeys = 2;
5249 keymap.hfkey[0].hf_kpos = 15;
5250 keymap.hfkey[0].hf_kstate = HFMAPCHAR | HFSHFNONE;
5251 #ifdef IBMR2AIX
5252 keymap.hfkey[0].hf_keyidh = '<';
5253 #else /* not IBMR2AIX */
5254 keymap.hfkey[0].hf_page = '<';
5255 #endif /* not IBMR2AIX */
5256 keymap.hfkey[0].hf_char = 8;
5257 keymap.hfkey[1].hf_kpos = 15;
5258 keymap.hfkey[1].hf_kstate = HFMAPCHAR | HFSHFSHFT;
5259 #ifdef IBMR2AIX
5260 keymap.hfkey[1].hf_keyidh = '<';
5261 #else /* not IBMR2AIX */
5262 keymap.hfkey[1].hf_page = '<';
5263 #endif /* not IBMR2AIX */
5264 keymap.hfkey[1].hf_char = 8;
5265 hftctl (0, HFSKBD, &buf);
5266 }
5267
5268 #endif /* AIXHFT */
5269
5270 #ifdef USE_DL_STUBS
5271
5272 /* These are included on Sunos 4.1 when we do not use shared libraries.
5273 X11 libraries may refer to these functions but (we hope) do not
5274 actually call them. */
5275
5276 void *
5277 dlopen ()
5278 {
5279 return 0;
5280 }
5281
5282 void *
5283 dlsym ()
5284 {
5285 return 0;
5286 }
5287
5288 int
5289 dlclose ()
5290 {
5291 return -1;
5292 }
5293
5294 #endif /* USE_DL_STUBS */
5295 \f
5296 #ifndef BSTRING
5297
5298 #ifndef bzero
5299
5300 void
5301 bzero (b, length)
5302 register char *b;
5303 register int length;
5304 {
5305 #ifdef VMS
5306 short zero = 0;
5307 long max_str = 65535;
5308
5309 while (length > max_str) {
5310 (void) LIB$MOVC5 (&zero, &zero, &zero, &max_str, b);
5311 length -= max_str;
5312 b += max_str;
5313 }
5314 max_str = length;
5315 (void) LIB$MOVC5 (&zero, &zero, &zero, &max_str, b);
5316 #else
5317 while (length-- > 0)
5318 *b++ = 0;
5319 #endif /* not VMS */
5320 }
5321
5322 #endif /* no bzero */
5323 #endif /* BSTRING */
5324
5325 #if (!defined (BSTRING) && !defined (bcopy)) || defined (NEED_BCOPY)
5326 #undef bcopy
5327
5328 /* Saying `void' requires a declaration, above, where bcopy is used
5329 and that declaration causes pain for systems where bcopy is a macro. */
5330 bcopy (b1, b2, length)
5331 register char *b1;
5332 register char *b2;
5333 register int length;
5334 {
5335 #ifdef VMS
5336 long max_str = 65535;
5337
5338 while (length > max_str) {
5339 (void) LIB$MOVC3 (&max_str, b1, b2);
5340 length -= max_str;
5341 b1 += max_str;
5342 b2 += max_str;
5343 }
5344 max_str = length;
5345 (void) LIB$MOVC3 (&length, b1, b2);
5346 #else
5347 while (length-- > 0)
5348 *b2++ = *b1++;
5349 #endif /* not VMS */
5350 }
5351 #endif /* (!defined (BSTRING) && !defined (bcopy)) || defined (NEED_BCOPY) */
5352
5353 #ifndef BSTRING
5354 #ifndef bcmp
5355 int
5356 bcmp (b1, b2, length) /* This could be a macro! */
5357 register char *b1;
5358 register char *b2;
5359 register int length;
5360 {
5361 #ifdef VMS
5362 struct dsc$descriptor_s src1 = {length, DSC$K_DTYPE_T, DSC$K_CLASS_S, b1};
5363 struct dsc$descriptor_s src2 = {length, DSC$K_DTYPE_T, DSC$K_CLASS_S, b2};
5364
5365 return STR$COMPARE (&src1, &src2);
5366 #else
5367 while (length-- > 0)
5368 if (*b1++ != *b2++)
5369 return 1;
5370
5371 return 0;
5372 #endif /* not VMS */
5373 }
5374 #endif /* no bcmp */
5375 #endif /* not BSTRING */
5376 \f
5377 #ifndef HAVE_STRSIGNAL
5378 char *
5379 strsignal (code)
5380 int code;
5381 {
5382 char *signame = 0;
5383
5384 if (0 <= code && code < NSIG)
5385 {
5386 #ifdef VMS
5387 signame = sys_errlist[code];
5388 #else
5389 /* Cast to suppress warning if the table has const char *. */
5390 signame = (char *) sys_siglist[code];
5391 #endif
5392 }
5393
5394 return signame;
5395 }
5396 #endif /* HAVE_STRSIGNAL */
5397
5398 /* arch-tag: edb43589-4e09-4544-b325-978b5b121dcf
5399 (do not change this comment) */
Unnamed repository; edit this file 'description' to name the repository.