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[bpt/emacs.git] / src / sysdep.c
1 /* Interfaces to system-dependent kernel and library entries.
2 Copyright (C) 1985, 86,87,88,93,94,95, 1999, 2000
3 Free Software Foundation, Inc.
4
5 This file is part of GNU Emacs.
6
7 GNU Emacs is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
10 any later version.
11
12 GNU Emacs is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs; see the file COPYING. If not, write to
19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
21
22
23 #include "config.h"
24 #include <signal.h>
25 #include <setjmp.h>
26 #ifdef HAVE_UNISTD_H
27 #include <unistd.h>
28 #endif
29
30 #include "lisp.h"
31 #include "blockinput.h"
32 #undef NULL
33
34 #ifdef macintosh
35 /* It is essential to include stdlib.h so that this file picks up
36 the correct definitions of rand, srand, and RAND_MAX.
37 Otherwise random numbers will not work correctly. */
38 #include <stdlib.h>
39
40 #ifndef subprocesses
41 /* Nonzero means delete a process right away if it exits (process.c). */
42 static int delete_exited_processes;
43 #endif
44 #endif /* macintosh */
45
46 #define min(x,y) ((x) > (y) ? (y) : (x))
47
48 #ifdef WINDOWSNT
49 #define read sys_read
50 #define write sys_write
51 #include <windows.h>
52 #ifndef NULL
53 #define NULL 0
54 #endif
55 #endif /* not WINDOWSNT */
56
57 /* Does anyone other than VMS need this? */
58 #ifndef fwrite
59 #define sys_fwrite fwrite
60 #else
61 #undef fwrite
62 #endif
63
64 #include <stdio.h>
65 #include <sys/types.h>
66 #include <sys/stat.h>
67 #include <errno.h>
68
69 /* Get _POSIX_VDISABLE, if it is available. */
70 #ifdef HAVE_UNISTD_H
71 #include <unistd.h>
72 #endif
73
74 #ifdef HAVE_STDLIB_H
75 #include <stdlib.h>
76 #endif
77
78 #ifdef HAVE_SETPGID
79 #if !defined (USG) || defined (BSD_PGRPS)
80 #undef setpgrp
81 #define setpgrp setpgid
82 #endif
83 #endif
84
85 /* Get SI_SRPC_DOMAIN, if it is available. */
86 #ifdef HAVE_SYS_SYSTEMINFO_H
87 #include <sys/systeminfo.h>
88 #endif
89
90 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida, MW Aug 1993 */
91 #include <dos.h>
92 #include "dosfns.h"
93 #include "msdos.h"
94 #include <sys/param.h>
95
96 #if __DJGPP__ > 1
97 extern int etext;
98 extern unsigned start __asm__ ("start");
99 #endif
100 #endif
101
102 #ifndef USE_CRT_DLL
103 #ifndef errno
104 extern int errno;
105 #endif
106 #endif
107
108 #ifdef VMS
109 #include <rms.h>
110 #include <ttdef.h>
111 #include <tt2def.h>
112 #include <iodef.h>
113 #include <ssdef.h>
114 #include <descrip.h>
115 #include <fibdef.h>
116 #include <atrdef.h>
117 #include <ctype.h>
118 #include <string.h>
119 #ifdef __GNUC__
120 #include <sys/file.h>
121 #else
122 #include <file.h>
123 #endif
124 #undef F_SETFL
125 #ifndef RAB$C_BID
126 #include <rab.h>
127 #endif
128 #define MAXIOSIZE (32 * PAGESIZE) /* Don't I/O more than 32 blocks at a time */
129 #endif /* VMS */
130
131 #ifndef BSD4_1
132 #ifdef BSD_SYSTEM /* avoid writing defined (BSD_SYSTEM) || defined (USG)
133 because the vms compiler doesn't grok `defined' */
134 #include <fcntl.h>
135 #endif
136 #ifdef USG
137 #ifndef USG5
138 #include <fcntl.h>
139 #endif
140 #endif
141 #endif /* not 4.1 bsd */
142
143 #ifndef MSDOS
144 #include <sys/ioctl.h>
145 #endif
146
147 #include "systty.h"
148 #include "syswait.h"
149
150 #ifdef BROKEN_TIOCGWINSZ
151 #undef TIOCGWINSZ
152 #undef TIOCSWINSZ
153 #endif
154
155 #if defined (USG) || defined (DGUX)
156 #include <sys/utsname.h>
157 #ifndef MEMORY_IN_STRING_H
158 #include <memory.h>
159 #endif
160 #if defined (TIOCGWINSZ) || defined (ISC4_0)
161 #ifdef NEED_SIOCTL
162 #include <sys/sioctl.h>
163 #endif
164 #ifdef NEED_PTEM_H
165 #include <sys/stream.h>
166 #include <sys/ptem.h>
167 #endif
168 #endif /* TIOCGWINSZ or ISC4_0 */
169 #endif /* USG or DGUX */
170
171 extern int quit_char;
172
173 #include "keyboard.h"
174 #include "frame.h"
175 #include "window.h"
176 #include "termhooks.h"
177 #include "termchar.h"
178 #include "termopts.h"
179 #include "dispextern.h"
180 #include "process.h"
181
182 #ifdef WINDOWSNT
183 #include <direct.h>
184 /* In process.h which conflicts with the local copy. */
185 #define _P_WAIT 0
186 int _CRTAPI1 _spawnlp (int, const char *, const char *, ...);
187 int _CRTAPI1 _getpid (void);
188 #endif
189
190 #ifdef NONSYSTEM_DIR_LIBRARY
191 #include "ndir.h"
192 #endif /* NONSYSTEM_DIR_LIBRARY */
193
194 #include "syssignal.h"
195 #include "systime.h"
196 #ifdef HAVE_UTIME_H
197 #include <utime.h>
198 #endif
199
200 #ifndef HAVE_UTIMES
201 #ifndef HAVE_STRUCT_UTIMBUF
202 /* We want to use utime rather than utimes, but we couldn't find the
203 structure declaration. We'll use the traditional one. */
204 struct utimbuf {
205 long actime;
206 long modtime;
207 };
208 #endif
209 #endif
210
211 /* LPASS8 is new in 4.3, and makes cbreak mode provide all 8 bits. */
212 #ifndef LPASS8
213 #define LPASS8 0
214 #endif
215
216 #ifdef BSD4_1
217 #define LNOFLSH 0100000
218 #endif
219
220 static int baud_convert[] =
221 #ifdef BAUD_CONVERT
222 BAUD_CONVERT;
223 #else
224 {
225 0, 50, 75, 110, 135, 150, 200, 300, 600, 1200,
226 1800, 2400, 4800, 9600, 19200, 38400
227 };
228 #endif
229
230 #ifdef HAVE_SPEED_T
231 #include <termios.h>
232 #else
233 #if defined (HAVE_LIBNCURSES) && ! defined (NCURSES_OSPEED_T)
234 #else
235 #if defined (HAVE_TERMIOS_H) && defined (LINUX)
236 #include <termios.h>
237 #endif
238 #endif
239 #endif
240
241 int emacs_ospeed;
242
243 /* The file descriptor for Emacs's input terminal.
244 Under Unix, this is normally zero except when using X;
245 under VMS, we place the input channel number here. */
246 int input_fd;
247
248 void croak P_ ((char *));
249
250 #ifdef AIXHFT
251 void hft_init ();
252 void hft_reset ();
253 #endif
254
255 /* Temporary used by `sigblock' when defined in terms of signprocmask. */
256
257 SIGMASKTYPE sigprocmask_set;
258
259 \f
260 /* Specify a different file descriptor for further input operations. */
261
262 void
263 change_input_fd (fd)
264 int fd;
265 {
266 input_fd = fd;
267 }
268
269 /* Discard pending input on descriptor input_fd. */
270
271 void
272 discard_tty_input ()
273 {
274 #ifndef WINDOWSNT
275 struct emacs_tty buf;
276
277 if (noninteractive)
278 return;
279
280 /* Discarding input is not safe when the input could contain
281 replies from the X server. So don't do it. */
282 if (read_socket_hook)
283 return;
284
285 #ifdef VMS
286 end_kbd_input ();
287 SYS$QIOW (0, input_fd, IO$_READVBLK|IO$M_PURGE, input_iosb, 0, 0,
288 &buf.main, 0, 0, terminator_mask, 0, 0);
289 queue_kbd_input ();
290 #else /* not VMS */
291 #ifdef APOLLO
292 {
293 int zero = 0;
294 ioctl (input_fd, TIOCFLUSH, &zero);
295 }
296 #else /* not Apollo */
297 #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */
298 while (dos_keyread () != -1)
299 ;
300 #else /* not MSDOS */
301 EMACS_GET_TTY (input_fd, &buf);
302 EMACS_SET_TTY (input_fd, &buf, 0);
303 #endif /* not MSDOS */
304 #endif /* not Apollo */
305 #endif /* not VMS */
306 #endif /* not WINDOWSNT */
307 }
308
309 #ifdef SIGTSTP
310
311 /* Arrange for character C to be read as the next input from
312 the terminal. */
313
314 void
315 stuff_char (c)
316 char c;
317 {
318 if (read_socket_hook)
319 return;
320
321 /* Should perhaps error if in batch mode */
322 #ifdef TIOCSTI
323 ioctl (input_fd, TIOCSTI, &c);
324 #else /* no TIOCSTI */
325 error ("Cannot stuff terminal input characters in this version of Unix");
326 #endif /* no TIOCSTI */
327 }
328
329 #endif /* SIGTSTP */
330 \f
331 void
332 init_baud_rate ()
333 {
334 if (noninteractive)
335 emacs_ospeed = 0;
336 else
337 {
338 #ifdef INIT_BAUD_RATE
339 INIT_BAUD_RATE ();
340 #else
341 #ifdef DOS_NT
342 emacs_ospeed = 15;
343 #else /* not DOS_NT */
344 #ifdef VMS
345 struct sensemode sg;
346
347 SYS$QIOW (0, input_fd, IO$_SENSEMODE, &sg, 0, 0,
348 &sg.class, 12, 0, 0, 0, 0 );
349 emacs_ospeed = sg.xmit_baud;
350 #else /* not VMS */
351 #ifdef HAVE_TERMIOS
352 struct termios sg;
353
354 sg.c_cflag = B9600;
355 tcgetattr (input_fd, &sg);
356 emacs_ospeed = cfgetospeed (&sg);
357 #if defined (USE_GETOBAUD) && defined (getobaud)
358 /* m88k-motorola-sysv3 needs this (ghazi@noc.rutgers.edu) 9/1/94. */
359 if (emacs_ospeed == 0)
360 emacs_ospeed = getobaud (sg.c_cflag);
361 #endif
362 #else /* neither VMS nor TERMIOS */
363 #ifdef HAVE_TERMIO
364 struct termio sg;
365
366 sg.c_cflag = B9600;
367 #ifdef HAVE_TCATTR
368 tcgetattr (input_fd, &sg);
369 #else
370 ioctl (input_fd, TCGETA, &sg);
371 #endif
372 emacs_ospeed = sg.c_cflag & CBAUD;
373 #else /* neither VMS nor TERMIOS nor TERMIO */
374 struct sgttyb sg;
375
376 sg.sg_ospeed = B9600;
377 if (ioctl (input_fd, TIOCGETP, &sg) < 0)
378 abort ();
379 emacs_ospeed = sg.sg_ospeed;
380 #endif /* not HAVE_TERMIO */
381 #endif /* not HAVE_TERMIOS */
382 #endif /* not VMS */
383 #endif /* not DOS_NT */
384 #endif /* not INIT_BAUD_RATE */
385 }
386
387 baud_rate = (emacs_ospeed < sizeof baud_convert / sizeof baud_convert[0]
388 ? baud_convert[emacs_ospeed] : 9600);
389 if (baud_rate == 0)
390 baud_rate = 1200;
391 }
392
393 /*ARGSUSED*/
394 void
395 set_exclusive_use (fd)
396 int fd;
397 {
398 #ifdef FIOCLEX
399 ioctl (fd, FIOCLEX, 0);
400 #endif
401 /* Ok to do nothing if this feature does not exist */
402 }
403 \f
404 #ifndef subprocesses
405
406 wait_without_blocking ()
407 {
408 #ifdef BSD_SYSTEM
409 wait3 (0, WNOHANG | WUNTRACED, 0);
410 #else
411 croak ("wait_without_blocking");
412 #endif
413 synch_process_alive = 0;
414 }
415
416 #endif /* not subprocesses */
417
418 int wait_debugging; /* Set nonzero to make following function work under dbx
419 (at least for bsd). */
420
421 SIGTYPE
422 wait_for_termination_signal ()
423 {}
424
425 /* Wait for subprocess with process id `pid' to terminate and
426 make sure it will get eliminated (not remain forever as a zombie) */
427
428 void
429 wait_for_termination (pid)
430 int pid;
431 {
432 while (1)
433 {
434 #ifdef subprocesses
435 #ifdef VMS
436 int status;
437
438 status = SYS$FORCEX (&pid, 0, 0);
439 break;
440 #else /* not VMS */
441 #if defined (BSD_SYSTEM) || (defined (HPUX) && !defined (HPUX_5))
442 /* Note that kill returns -1 even if the process is just a zombie now.
443 But inevitably a SIGCHLD interrupt should be generated
444 and child_sig will do wait3 and make the process go away. */
445 /* There is some indication that there is a bug involved with
446 termination of subprocesses, perhaps involving a kernel bug too,
447 but no idea what it is. Just as a hunch we signal SIGCHLD to see
448 if that causes the problem to go away or get worse. */
449 sigsetmask (sigmask (SIGCHLD));
450 if (0 > kill (pid, 0))
451 {
452 sigsetmask (SIGEMPTYMASK);
453 kill (getpid (), SIGCHLD);
454 break;
455 }
456 if (wait_debugging)
457 sleep (1);
458 else
459 sigpause (SIGEMPTYMASK);
460 #else /* not BSD_SYSTEM, and not HPUX version >= 6 */
461 #if defined (UNIPLUS)
462 if (0 > kill (pid, 0))
463 break;
464 wait (0);
465 #else /* neither BSD_SYSTEM nor UNIPLUS: random sysV */
466 #ifdef POSIX_SIGNALS /* would this work for LINUX as well? */
467 sigblock (sigmask (SIGCHLD));
468 if (0 > kill (pid, 0))
469 {
470 sigunblock (sigmask (SIGCHLD));
471 break;
472 }
473 sigpause (SIGEMPTYMASK);
474 #else /* not POSIX_SIGNALS */
475 #ifdef HAVE_SYSV_SIGPAUSE
476 sighold (SIGCHLD);
477 if (0 > kill (pid, 0))
478 {
479 sigrelse (SIGCHLD);
480 break;
481 }
482 sigpause (SIGCHLD);
483 #else /* not HAVE_SYSV_SIGPAUSE */
484 #ifdef WINDOWSNT
485 wait (0);
486 break;
487 #else /* not WINDOWSNT */
488 if (0 > kill (pid, 0))
489 break;
490 /* Using sleep instead of pause avoids timing error.
491 If the inferior dies just before the sleep,
492 we lose just one second. */
493 sleep (1);
494 #endif /* not WINDOWSNT */
495 #endif /* not HAVE_SYSV_SIGPAUSE */
496 #endif /* not POSIX_SIGNALS */
497 #endif /* not UNIPLUS */
498 #endif /* not BSD_SYSTEM, and not HPUX version >= 6 */
499 #endif /* not VMS */
500 #else /* not subprocesses */
501 #if __DJGPP__ > 1
502 break;
503 #else /* not __DJGPP__ > 1 */
504 #ifndef BSD4_1
505 if (kill (pid, 0) < 0)
506 break;
507 wait (0);
508 #else /* BSD4_1 */
509 int status;
510 status = wait (0);
511 if (status == pid || status == -1)
512 break;
513 #endif /* BSD4_1 */
514 #endif /* not __DJGPP__ > 1*/
515 #endif /* not subprocesses */
516 }
517 }
518
519 #ifdef subprocesses
520
521 /*
522 * flush any pending output
523 * (may flush input as well; it does not matter the way we use it)
524 */
525
526 void
527 flush_pending_output (channel)
528 int channel;
529 {
530 #ifdef HAVE_TERMIOS
531 /* If we try this, we get hit with SIGTTIN, because
532 the child's tty belongs to the child's pgrp. */
533 #else
534 #ifdef TCFLSH
535 ioctl (channel, TCFLSH, 1);
536 #else
537 #ifdef TIOCFLUSH
538 int zero = 0;
539 /* 3rd arg should be ignored
540 but some 4.2 kernels actually want the address of an int
541 and nonzero means something different. */
542 ioctl (channel, TIOCFLUSH, &zero);
543 #endif
544 #endif
545 #endif
546 }
547 \f
548 #ifndef VMS
549 /* Set up the terminal at the other end of a pseudo-terminal that
550 we will be controlling an inferior through.
551 It should not echo or do line-editing, since that is done
552 in Emacs. No padding needed for insertion into an Emacs buffer. */
553
554 void
555 child_setup_tty (out)
556 int out;
557 {
558 #ifndef DOS_NT
559 struct emacs_tty s;
560
561 EMACS_GET_TTY (out, &s);
562
563 #if defined (HAVE_TERMIO) || defined (HAVE_TERMIOS)
564 s.main.c_oflag |= OPOST; /* Enable output postprocessing */
565 s.main.c_oflag &= ~ONLCR; /* Disable map of NL to CR-NL on output */
566 #ifdef NLDLY
567 s.main.c_oflag &= ~(NLDLY|CRDLY|TABDLY|BSDLY|VTDLY|FFDLY);
568 /* No output delays */
569 #endif
570 s.main.c_lflag &= ~ECHO; /* Disable echo */
571 s.main.c_lflag |= ISIG; /* Enable signals */
572 #ifdef IUCLC
573 s.main.c_iflag &= ~IUCLC; /* Disable downcasing on input. */
574 #endif
575 #ifdef ISTRIP
576 s.main.c_iflag &= ~ISTRIP; /* don't strip 8th bit on input */
577 #endif
578 #ifdef OLCUC
579 s.main.c_oflag &= ~OLCUC; /* Disable upcasing on output. */
580 #endif
581 s.main.c_oflag &= ~TAB3; /* Disable tab expansion */
582 s.main.c_cflag = (s.main.c_cflag & ~CSIZE) | CS8; /* Don't strip 8th bit */
583 #if 0
584 /* Said to be unnecessary: */
585 s.main.c_cc[VMIN] = 1; /* minimum number of characters to accept */
586 s.main.c_cc[VTIME] = 0; /* wait forever for at least 1 character */
587 #endif
588
589 s.main.c_lflag |= ICANON; /* Enable erase/kill and eof processing */
590 s.main.c_cc[VEOF] = 04; /* insure that EOF is Control-D */
591 s.main.c_cc[VERASE] = CDISABLE; /* disable erase processing */
592 s.main.c_cc[VKILL] = CDISABLE; /* disable kill processing */
593
594 #ifdef HPUX
595 s.main.c_cflag = (s.main.c_cflag & ~CBAUD) | B9600; /* baud rate sanity */
596 #endif /* HPUX */
597
598 #ifdef AIX
599 /* AIX enhanced edit loses NULs, so disable it */
600 #ifndef IBMR2AIX
601 s.main.c_line = 0;
602 s.main.c_iflag &= ~ASCEDIT;
603 #endif
604 /* Also, PTY overloads NUL and BREAK.
605 don't ignore break, but don't signal either, so it looks like NUL. */
606 s.main.c_iflag &= ~IGNBRK;
607 s.main.c_iflag &= ~BRKINT;
608 /* QUIT and INTR work better as signals, so disable character forms */
609 s.main.c_cc[VINTR] = 0377;
610 #ifdef SIGNALS_VIA_CHARACTERS
611 /* the QUIT and INTR character are used in process_send_signal
612 so set them here to something useful. */
613 if (s.main.c_cc[VQUIT] == 0377)
614 s.main.c_cc[VQUIT] = '\\'&037; /* Control-\ */
615 if (s.main.c_cc[VINTR] == 0377)
616 s.main.c_cc[VINTR] = 'C'&037; /* Control-C */
617 #else /* no TIOCGPGRP or no TIOCGLTC or no TIOCGETC */
618 /* QUIT and INTR work better as signals, so disable character forms */
619 s.main.c_cc[VQUIT] = 0377;
620 s.main.c_cc[VINTR] = 0377;
621 s.main.c_lflag &= ~ISIG;
622 #endif /* no TIOCGPGRP or no TIOCGLTC or no TIOCGETC */
623 s.main.c_cc[VEOL] = 0377;
624 s.main.c_cflag = (s.main.c_cflag & ~CBAUD) | B9600; /* baud rate sanity */
625 #endif /* AIX */
626
627 #else /* not HAVE_TERMIO */
628
629 s.main.sg_flags &= ~(ECHO | CRMOD | ANYP | ALLDELAY | RAW | LCASE
630 | CBREAK | TANDEM);
631 s.main.sg_flags |= LPASS8;
632 s.main.sg_erase = 0377;
633 s.main.sg_kill = 0377;
634 s.lmode = LLITOUT | s.lmode; /* Don't strip 8th bit */
635
636 #endif /* not HAVE_TERMIO */
637
638 EMACS_SET_TTY (out, &s, 0);
639
640 #ifdef BSD4_1
641 if (interrupt_input)
642 reset_sigio ();
643 #endif /* BSD4_1 */
644 #ifdef RTU
645 {
646 int zero = 0;
647 ioctl (out, FIOASYNC, &zero);
648 }
649 #endif /* RTU */
650 #endif /* not DOS_NT */
651 }
652 #endif /* not VMS */
653
654 #endif /* subprocesses */
655 \f
656 /* Record a signal code and the handler for it. */
657 struct save_signal
658 {
659 int code;
660 SIGTYPE (*handler) P_ ((int));
661 };
662
663 static void save_signal_handlers P_ ((struct save_signal *));
664 static void restore_signal_handlers P_ ((struct save_signal *));
665
666 /* Suspend the Emacs process; give terminal to its superior. */
667
668 void
669 sys_suspend ()
670 {
671 #ifdef VMS
672 /* "Foster" parentage allows emacs to return to a subprocess that attached
673 to the current emacs as a cheaper than starting a whole new process. This
674 is set up by KEPTEDITOR.COM. */
675 unsigned long parent_id, foster_parent_id;
676 char *fpid_string;
677
678 fpid_string = getenv ("EMACS_PARENT_PID");
679 if (fpid_string != NULL)
680 {
681 sscanf (fpid_string, "%x", &foster_parent_id);
682 if (foster_parent_id != 0)
683 parent_id = foster_parent_id;
684 else
685 parent_id = getppid ();
686 }
687 else
688 parent_id = getppid ();
689
690 xfree (fpid_string); /* On VMS, this was malloc'd */
691
692 if (parent_id && parent_id != 0xffffffff)
693 {
694 SIGTYPE (*oldsig)() = (int) signal (SIGINT, SIG_IGN);
695 int status = LIB$ATTACH (&parent_id) & 1;
696 signal (SIGINT, oldsig);
697 return status;
698 }
699 else
700 {
701 struct {
702 int l;
703 char *a;
704 } d_prompt;
705 d_prompt.l = sizeof ("Emacs: "); /* Our special prompt */
706 d_prompt.a = "Emacs: "; /* Just a reminder */
707 LIB$SPAWN (0, 0, 0, 0, 0, 0, 0, 0, 0, 0, &d_prompt, 0);
708 return 1;
709 }
710 return -1;
711 #else
712 #if defined (SIGTSTP) && !defined (MSDOS)
713
714 {
715 int pgrp = EMACS_GETPGRP (0);
716 EMACS_KILLPG (pgrp, SIGTSTP);
717 }
718
719 #else /* No SIGTSTP */
720 #ifdef USG_JOBCTRL /* If you don't know what this is don't mess with it */
721 ptrace (0, 0, 0, 0); /* set for ptrace - caught by csh */
722 kill (getpid (), SIGQUIT);
723
724 #else /* No SIGTSTP or USG_JOBCTRL */
725
726 /* On a system where suspending is not implemented,
727 instead fork a subshell and let it talk directly to the terminal
728 while we wait. */
729 sys_subshell ();
730
731 #endif /* no USG_JOBCTRL */
732 #endif /* no SIGTSTP */
733 #endif /* not VMS */
734 }
735
736 /* Fork a subshell. */
737
738 #ifndef macintosh
739 void
740 sys_subshell ()
741 {
742 #ifndef VMS
743 #ifdef DOS_NT /* Demacs 1.1.2 91/10/20 Manabu Higashida */
744 int st;
745 char oldwd[MAXPATHLEN+1]; /* Fixed length is safe on MSDOS. */
746 #endif
747 int pid;
748 struct save_signal saved_handlers[5];
749 Lisp_Object dir;
750 unsigned char *str = 0;
751 int len;
752
753 saved_handlers[0].code = SIGINT;
754 saved_handlers[1].code = SIGQUIT;
755 saved_handlers[2].code = SIGTERM;
756 #ifdef SIGIO
757 saved_handlers[3].code = SIGIO;
758 saved_handlers[4].code = 0;
759 #else
760 saved_handlers[3].code = 0;
761 #endif
762
763 /* Mentioning current_buffer->buffer would mean including buffer.h,
764 which somehow wedges the hp compiler. So instead... */
765
766 dir = intern ("default-directory");
767 if (NILP (Fboundp (dir)))
768 goto xyzzy;
769 dir = Fsymbol_value (dir);
770 if (!STRINGP (dir))
771 goto xyzzy;
772
773 dir = expand_and_dir_to_file (Funhandled_file_name_directory (dir), Qnil);
774 str = (unsigned char *) alloca (XSTRING (dir)->size + 2);
775 len = XSTRING (dir)->size;
776 bcopy (XSTRING (dir)->data, str, len);
777 if (str[len - 1] != '/') str[len++] = '/';
778 str[len] = 0;
779 xyzzy:
780
781 #ifdef DOS_NT
782 pid = 0;
783 #if __DJGPP__ > 1
784 save_signal_handlers (saved_handlers);
785 synch_process_alive = 1;
786 #endif /* __DJGPP__ > 1 */
787 #else
788 pid = vfork ();
789 if (pid == -1)
790 error ("Can't spawn subshell");
791 #endif
792
793 if (pid == 0)
794 {
795 char *sh = 0;
796
797 #ifdef DOS_NT /* MW, Aug 1993 */
798 getwd (oldwd);
799 if (sh == 0)
800 sh = (char *) egetenv ("SUSPEND"); /* KFS, 1994-12-14 */
801 #endif
802 if (sh == 0)
803 sh = (char *) egetenv ("SHELL");
804 if (sh == 0)
805 sh = "sh";
806
807 /* Use our buffer's default directory for the subshell. */
808 if (str)
809 chdir ((char *) str);
810
811 #ifdef subprocesses
812 close_process_descs (); /* Close Emacs's pipes/ptys */
813 #endif
814
815 #ifdef SET_EMACS_PRIORITY
816 {
817 extern int emacs_priority;
818
819 if (emacs_priority < 0)
820 nice (-emacs_priority);
821 }
822 #endif
823
824 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */
825 st = system (sh);
826 chdir (oldwd);
827 #if 0 /* This is also reported if last command executed in subshell failed, KFS */
828 if (st)
829 report_file_error ("Can't execute subshell", Fcons (build_string (sh), Qnil));
830 #endif
831 #else /* not MSDOS */
832 #ifdef WINDOWSNT
833 /* Waits for process completion */
834 pid = _spawnlp (_P_WAIT, sh, sh, NULL);
835 chdir (oldwd);
836 if (pid == -1)
837 write (1, "Can't execute subshell", 22);
838 #else /* not WINDOWSNT */
839 execlp (sh, sh, 0);
840 write (1, "Can't execute subshell", 22);
841 _exit (1);
842 #endif /* not WINDOWSNT */
843 #endif /* not MSDOS */
844 }
845
846 /* Do this now if we did not do it before. */
847 #if !defined (MSDOS) || __DJGPP__ == 1
848 save_signal_handlers (saved_handlers);
849 synch_process_alive = 1;
850 #endif
851
852 #ifndef DOS_NT
853 wait_for_termination (pid);
854 #endif
855 restore_signal_handlers (saved_handlers);
856 synch_process_alive = 0;
857 #endif /* !VMS */
858 }
859 #endif /* !macintosh */
860
861 static void
862 save_signal_handlers (saved_handlers)
863 struct save_signal *saved_handlers;
864 {
865 while (saved_handlers->code)
866 {
867 saved_handlers->handler
868 = (SIGTYPE (*) P_ ((int))) signal (saved_handlers->code, SIG_IGN);
869 saved_handlers++;
870 }
871 }
872
873 static void
874 restore_signal_handlers (saved_handlers)
875 struct save_signal *saved_handlers;
876 {
877 while (saved_handlers->code)
878 {
879 signal (saved_handlers->code, saved_handlers->handler);
880 saved_handlers++;
881 }
882 }
883 \f
884 #ifdef F_SETFL
885
886 int old_fcntl_flags;
887
888 void
889 init_sigio (fd)
890 int fd;
891 {
892 #ifdef FASYNC
893 old_fcntl_flags = fcntl (fd, F_GETFL, 0) & ~FASYNC;
894 fcntl (fd, F_SETFL, old_fcntl_flags | FASYNC);
895 #endif
896 interrupts_deferred = 0;
897 }
898
899 void
900 reset_sigio ()
901 {
902 unrequest_sigio ();
903 }
904
905 #ifdef FASYNC /* F_SETFL does not imply existence of FASYNC */
906
907 void
908 request_sigio ()
909 {
910 if (read_socket_hook)
911 return;
912
913 #ifdef SIGWINCH
914 sigunblock (sigmask (SIGWINCH));
915 #endif
916 fcntl (input_fd, F_SETFL, old_fcntl_flags | FASYNC);
917
918 interrupts_deferred = 0;
919 }
920
921 void
922 unrequest_sigio ()
923 {
924 if (read_socket_hook)
925 return;
926
927 #ifdef SIGWINCH
928 sigblock (sigmask (SIGWINCH));
929 #endif
930 fcntl (input_fd, F_SETFL, old_fcntl_flags);
931 interrupts_deferred = 1;
932 }
933
934 #else /* no FASYNC */
935 #ifdef STRIDE /* Stride doesn't have FASYNC - use FIOASYNC */
936
937 void
938 request_sigio ()
939 {
940 int on = 1;
941
942 if (read_socket_hook)
943 return;
944
945 ioctl (input_fd, FIOASYNC, &on);
946 interrupts_deferred = 0;
947 }
948
949 void
950 unrequest_sigio ()
951 {
952 int off = 0;
953
954 if (read_socket_hook)
955 return;
956
957 ioctl (input_fd, FIOASYNC, &off);
958 interrupts_deferred = 1;
959 }
960
961 #else /* not FASYNC, not STRIDE */
962
963 #ifdef _CX_UX
964
965 #include <termios.h>
966
967 void
968 request_sigio ()
969 {
970 int on = 1;
971 sigset_t st;
972
973 if (read_socket_hook)
974 return;
975
976 sigemptyset (&st);
977 sigaddset (&st, SIGIO);
978 ioctl (input_fd, FIOASYNC, &on);
979 interrupts_deferred = 0;
980 sigprocmask (SIG_UNBLOCK, &st, (sigset_t *)0);
981 }
982
983 void
984 unrequest_sigio ()
985 {
986 int off = 0;
987
988 if (read_socket_hook)
989 return;
990
991 ioctl (input_fd, FIOASYNC, &off);
992 interrupts_deferred = 1;
993 }
994
995 #else /* ! _CX_UX */
996
997 void
998 request_sigio ()
999 {
1000 if (read_socket_hook)
1001 return;
1002
1003 croak ("request_sigio");
1004 }
1005
1006 void
1007 unrequest_sigio ()
1008 {
1009 if (read_socket_hook)
1010 return;
1011
1012 croak ("unrequest_sigio");
1013 }
1014
1015 #endif /* _CX_UX */
1016 #endif /* STRIDE */
1017 #endif /* FASYNC */
1018 #endif /* F_SETFL */
1019 \f
1020 /* Saving and restoring the process group of Emacs's terminal. */
1021
1022 #ifdef BSD_PGRPS
1023
1024 /* The process group of which Emacs was a member when it initially
1025 started.
1026
1027 If Emacs was in its own process group (i.e. inherited_pgroup ==
1028 getpid ()), then we know we're running under a shell with job
1029 control (Emacs would never be run as part of a pipeline).
1030 Everything is fine.
1031
1032 If Emacs was not in its own process group, then we know we're
1033 running under a shell (or a caller) that doesn't know how to
1034 separate itself from Emacs (like sh). Emacs must be in its own
1035 process group in order to receive SIGIO correctly. In this
1036 situation, we put ourselves in our own pgroup, forcibly set the
1037 tty's pgroup to our pgroup, and make sure to restore and reinstate
1038 the tty's pgroup just like any other terminal setting. If
1039 inherited_group was not the tty's pgroup, then we'll get a
1040 SIGTTmumble when we try to change the tty's pgroup, and a CONT if
1041 it goes foreground in the future, which is what should happen. */
1042 int inherited_pgroup;
1043
1044 /* Split off the foreground process group to Emacs alone.
1045 When we are in the foreground, but not started in our own process
1046 group, redirect the TTY to point to our own process group. We need
1047 to be in our own process group to receive SIGIO properly. */
1048 void
1049 narrow_foreground_group ()
1050 {
1051 int me = getpid ();
1052
1053 setpgrp (0, inherited_pgroup);
1054 if (inherited_pgroup != me)
1055 EMACS_SET_TTY_PGRP (input_fd, &me);
1056 setpgrp (0, me);
1057 }
1058
1059 /* Set the tty to our original foreground group. */
1060 void
1061 widen_foreground_group ()
1062 {
1063 if (inherited_pgroup != getpid ())
1064 EMACS_SET_TTY_PGRP (input_fd, &inherited_pgroup);
1065 setpgrp (0, inherited_pgroup);
1066 }
1067
1068 #endif /* BSD_PGRPS */
1069 \f
1070 /* Getting and setting emacs_tty structures. */
1071
1072 /* Set *TC to the parameters associated with the terminal FD.
1073 Return zero if all's well, or -1 if we ran into an error we
1074 couldn't deal with. */
1075 int
1076 emacs_get_tty (fd, settings)
1077 int fd;
1078 struct emacs_tty *settings;
1079 {
1080 /* Retrieve the primary parameters - baud rate, character size, etcetera. */
1081 #ifdef HAVE_TCATTR
1082 /* We have those nifty POSIX tcmumbleattr functions. */
1083 bzero (&settings->main, sizeof (settings->main));
1084 if (tcgetattr (fd, &settings->main) < 0)
1085 return -1;
1086
1087 #else
1088 #ifdef HAVE_TERMIO
1089 /* The SYSV-style interface? */
1090 if (ioctl (fd, TCGETA, &settings->main) < 0)
1091 return -1;
1092
1093 #else
1094 #ifdef VMS
1095 /* Vehemently Monstrous System? :-) */
1096 if (! (SYS$QIOW (0, fd, IO$_SENSEMODE, settings, 0, 0,
1097 &settings->main.class, 12, 0, 0, 0, 0)
1098 & 1))
1099 return -1;
1100
1101 #else
1102 #ifndef DOS_NT
1103 /* I give up - I hope you have the BSD ioctls. */
1104 if (ioctl (fd, TIOCGETP, &settings->main) < 0)
1105 return -1;
1106 #endif /* not DOS_NT */
1107 #endif
1108 #endif
1109 #endif
1110
1111 /* Suivant - Do we have to get struct ltchars data? */
1112 #ifdef HAVE_LTCHARS
1113 if (ioctl (fd, TIOCGLTC, &settings->ltchars) < 0)
1114 return -1;
1115 #endif
1116
1117 /* How about a struct tchars and a wordful of lmode bits? */
1118 #ifdef HAVE_TCHARS
1119 if (ioctl (fd, TIOCGETC, &settings->tchars) < 0
1120 || ioctl (fd, TIOCLGET, &settings->lmode) < 0)
1121 return -1;
1122 #endif
1123
1124 /* We have survived the tempest. */
1125 return 0;
1126 }
1127
1128
1129 /* Set the parameters of the tty on FD according to the contents of
1130 *SETTINGS. If FLUSHP is non-zero, we discard input.
1131 Return 0 if all went well, and -1 if anything failed. */
1132
1133 int
1134 emacs_set_tty (fd, settings, flushp)
1135 int fd;
1136 struct emacs_tty *settings;
1137 int flushp;
1138 {
1139 /* Set the primary parameters - baud rate, character size, etcetera. */
1140 #ifdef HAVE_TCATTR
1141 int i;
1142 /* We have those nifty POSIX tcmumbleattr functions.
1143 William J. Smith <wjs@wiis.wang.com> writes:
1144 "POSIX 1003.1 defines tcsetattr to return success if it was
1145 able to perform any of the requested actions, even if some
1146 of the requested actions could not be performed.
1147 We must read settings back to ensure tty setup properly.
1148 AIX requires this to keep tty from hanging occasionally." */
1149 /* This make sure that we don't loop indefinitely in here. */
1150 for (i = 0 ; i < 10 ; i++)
1151 if (tcsetattr (fd, flushp ? TCSAFLUSH : TCSADRAIN, &settings->main) < 0)
1152 {
1153 if (errno == EINTR)
1154 continue;
1155 else
1156 return -1;
1157 }
1158 else
1159 {
1160 struct termios new;
1161
1162 bzero (&new, sizeof (new));
1163 /* Get the current settings, and see if they're what we asked for. */
1164 tcgetattr (fd, &new);
1165 /* We cannot use memcmp on the whole structure here because under
1166 * aix386 the termios structure has some reserved field that may
1167 * not be filled in.
1168 */
1169 if ( new.c_iflag == settings->main.c_iflag
1170 && new.c_oflag == settings->main.c_oflag
1171 && new.c_cflag == settings->main.c_cflag
1172 && new.c_lflag == settings->main.c_lflag
1173 && memcmp (new.c_cc, settings->main.c_cc, NCCS) == 0)
1174 break;
1175 else
1176 continue;
1177 }
1178
1179 #else
1180 #ifdef HAVE_TERMIO
1181 /* The SYSV-style interface? */
1182 if (ioctl (fd, flushp ? TCSETAF : TCSETAW, &settings->main) < 0)
1183 return -1;
1184
1185 #else
1186 #ifdef VMS
1187 /* Vehemently Monstrous System? :-) */
1188 if (! (SYS$QIOW (0, fd, IO$_SETMODE, &input_iosb, 0, 0,
1189 &settings->main.class, 12, 0, 0, 0, 0)
1190 & 1))
1191 return -1;
1192
1193 #else
1194 #ifndef DOS_NT
1195 /* I give up - I hope you have the BSD ioctls. */
1196 if (ioctl (fd, (flushp) ? TIOCSETP : TIOCSETN, &settings->main) < 0)
1197 return -1;
1198 #endif /* not DOS_NT */
1199
1200 #endif
1201 #endif
1202 #endif
1203
1204 /* Suivant - Do we have to get struct ltchars data? */
1205 #ifdef HAVE_LTCHARS
1206 if (ioctl (fd, TIOCSLTC, &settings->ltchars) < 0)
1207 return -1;
1208 #endif
1209
1210 /* How about a struct tchars and a wordful of lmode bits? */
1211 #ifdef HAVE_TCHARS
1212 if (ioctl (fd, TIOCSETC, &settings->tchars) < 0
1213 || ioctl (fd, TIOCLSET, &settings->lmode) < 0)
1214 return -1;
1215 #endif
1216
1217 /* We have survived the tempest. */
1218 return 0;
1219 }
1220
1221 \f
1222 /* The initial tty mode bits */
1223 struct emacs_tty old_tty;
1224
1225 /* 1 if we have been through init_sys_modes. */
1226 int term_initted;
1227
1228 /* 1 if outer tty status has been recorded. */
1229 int old_tty_valid;
1230
1231 #ifdef BSD4_1
1232 /* BSD 4.1 needs to keep track of the lmode bits in order to start
1233 sigio. */
1234 int lmode;
1235 #endif
1236
1237 #ifndef F_SETOWN_BUG
1238 #ifdef F_SETOWN
1239 int old_fcntl_owner;
1240 #endif /* F_SETOWN */
1241 #endif /* F_SETOWN_BUG */
1242
1243 /* This may also be defined in stdio,
1244 but if so, this does no harm,
1245 and using the same name avoids wasting the other one's space. */
1246
1247 #ifdef nec_ews_svr4
1248 extern char *_sobuf ;
1249 #else
1250 #if defined (USG) || defined (DGUX)
1251 unsigned char _sobuf[BUFSIZ+8];
1252 #else
1253 char _sobuf[BUFSIZ];
1254 #endif
1255 #endif
1256
1257 #ifdef HAVE_LTCHARS
1258 static struct ltchars new_ltchars = {-1,-1,-1,-1,-1,-1};
1259 #endif
1260 #ifdef HAVE_TCHARS
1261 static struct tchars new_tchars = {-1,-1,-1,-1,-1,-1};
1262 #endif
1263
1264 void
1265 init_sys_modes ()
1266 {
1267 struct emacs_tty tty;
1268
1269 #ifdef macintosh
1270 /* cus-start.el complains if delete-exited-processes is not defined */
1271 #ifndef subprocesses
1272 DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes,
1273 "*Non-nil means delete processes immediately when they exit.\n\
1274 nil means don't delete them until `list-processes' is run.");
1275 delete_exited_processes = 0;
1276 #endif
1277 #endif /* not macintosh */
1278
1279 #ifdef VMS
1280 #if 0
1281 static int oob_chars[2] = {0, 1 << 7}; /* catch C-g's */
1282 extern int (*interrupt_signal) ();
1283 #endif
1284 #endif
1285
1286 Vtty_erase_char = Qnil;
1287
1288 if (noninteractive)
1289 return;
1290
1291 #ifdef VMS
1292 if (!input_ef)
1293 input_ef = get_kbd_event_flag ();
1294 /* LIB$GET_EF (&input_ef); */
1295 SYS$CLREF (input_ef);
1296 waiting_for_ast = 0;
1297 if (!timer_ef)
1298 timer_ef = get_timer_event_flag ();
1299 /* LIB$GET_EF (&timer_ef); */
1300 SYS$CLREF (timer_ef);
1301 #if 0
1302 if (!process_ef)
1303 {
1304 LIB$GET_EF (&process_ef);
1305 SYS$CLREF (process_ef);
1306 }
1307 if (input_ef / 32 != process_ef / 32)
1308 croak ("Input and process event flags in different clusters.");
1309 #endif
1310 if (input_ef / 32 != timer_ef / 32)
1311 croak ("Input and timer event flags in different clusters.");
1312 #if 0
1313 input_eflist = ((unsigned) 1 << (input_ef % 32)) |
1314 ((unsigned) 1 << (process_ef % 32));
1315 #endif
1316 timer_eflist = ((unsigned) 1 << (input_ef % 32)) |
1317 ((unsigned) 1 << (timer_ef % 32));
1318 #ifndef VMS4_4
1319 sys_access_reinit ();
1320 #endif
1321 #endif /* not VMS */
1322
1323 #ifdef BSD_PGRPS
1324 if (! read_socket_hook && EQ (Vwindow_system, Qnil))
1325 narrow_foreground_group ();
1326 #endif
1327
1328 #ifdef HAVE_WINDOW_SYSTEM
1329 /* Emacs' window system on MSDOG uses the `internal terminal' and therefore
1330 needs the initialization code below. */
1331 if (!read_socket_hook && EQ (Vwindow_system, Qnil))
1332 #endif
1333 {
1334 EMACS_GET_TTY (input_fd, &old_tty);
1335
1336 old_tty_valid = 1;
1337
1338 tty = old_tty;
1339
1340 #if defined (HAVE_TERMIO) || defined (HAVE_TERMIOS)
1341 XSETINT (Vtty_erase_char, old_tty.main.c_cc[VERASE]);
1342
1343 #ifdef DGUX
1344 /* This allows meta to be sent on 8th bit. */
1345 tty.main.c_iflag &= ~INPCK; /* don't check input for parity */
1346 #endif
1347 tty.main.c_iflag |= (IGNBRK); /* Ignore break condition */
1348 tty.main.c_iflag &= ~ICRNL; /* Disable map of CR to NL on input */
1349 #ifdef INLCR /* I'm just being cautious,
1350 since I can't check how widespread INLCR is--rms. */
1351 tty.main.c_iflag &= ~INLCR; /* Disable map of NL to CR on input */
1352 #endif
1353 #ifdef ISTRIP
1354 tty.main.c_iflag &= ~ISTRIP; /* don't strip 8th bit on input */
1355 #endif
1356 tty.main.c_lflag &= ~ECHO; /* Disable echo */
1357 tty.main.c_lflag &= ~ICANON; /* Disable erase/kill processing */
1358 #ifdef IEXTEN
1359 tty.main.c_lflag &= ~IEXTEN; /* Disable other editing characters. */
1360 #endif
1361 tty.main.c_lflag |= ISIG; /* Enable signals */
1362 if (flow_control)
1363 {
1364 tty.main.c_iflag |= IXON; /* Enable start/stop output control */
1365 #ifdef IXANY
1366 tty.main.c_iflag &= ~IXANY;
1367 #endif /* IXANY */
1368 }
1369 else
1370 tty.main.c_iflag &= ~IXON; /* Disable start/stop output control */
1371 tty.main.c_oflag &= ~ONLCR; /* Disable map of NL to CR-NL
1372 on output */
1373 tty.main.c_oflag &= ~TAB3; /* Disable tab expansion */
1374 #ifdef CS8
1375 if (meta_key)
1376 {
1377 tty.main.c_cflag |= CS8; /* allow 8th bit on input */
1378 tty.main.c_cflag &= ~PARENB;/* Don't check parity */
1379 }
1380 #endif
1381 tty.main.c_cc[VINTR] = quit_char; /* C-g (usually) gives SIGINT */
1382 /* Set up C-g for both SIGQUIT and SIGINT.
1383 We don't know which we will get, but we handle both alike
1384 so which one it really gives us does not matter. */
1385 tty.main.c_cc[VQUIT] = quit_char;
1386 tty.main.c_cc[VMIN] = 1; /* Input should wait for at least 1 char */
1387 tty.main.c_cc[VTIME] = 0; /* no matter how long that takes. */
1388 #ifdef VSWTCH
1389 tty.main.c_cc[VSWTCH] = CDISABLE; /* Turn off shell layering use
1390 of C-z */
1391 #endif /* VSWTCH */
1392
1393 #if defined (mips) || defined (HAVE_TCATTR)
1394 #ifdef VSUSP
1395 tty.main.c_cc[VSUSP] = CDISABLE; /* Turn off mips handling of C-z. */
1396 #endif /* VSUSP */
1397 #ifdef V_DSUSP
1398 tty.main.c_cc[V_DSUSP] = CDISABLE; /* Turn off mips handling of C-y. */
1399 #endif /* V_DSUSP */
1400 #ifdef VDSUSP /* Some systems have VDSUSP, some have V_DSUSP. */
1401 tty.main.c_cc[VDSUSP] = CDISABLE;
1402 #endif /* VDSUSP */
1403 #ifdef VLNEXT
1404 tty.main.c_cc[VLNEXT] = CDISABLE;
1405 #endif /* VLNEXT */
1406 #ifdef VREPRINT
1407 tty.main.c_cc[VREPRINT] = CDISABLE;
1408 #endif /* VREPRINT */
1409 #ifdef VWERASE
1410 tty.main.c_cc[VWERASE] = CDISABLE;
1411 #endif /* VWERASE */
1412 #ifdef VDISCARD
1413 tty.main.c_cc[VDISCARD] = CDISABLE;
1414 #endif /* VDISCARD */
1415
1416 if (flow_control)
1417 {
1418 #ifdef VSTART
1419 tty.main.c_cc[VSTART] = '\021';
1420 #endif /* VSTART */
1421 #ifdef VSTOP
1422 tty.main.c_cc[VSTOP] = '\023';
1423 #endif /* VSTOP */
1424 }
1425 else
1426 {
1427 #ifdef VSTART
1428 tty.main.c_cc[VSTART] = CDISABLE;
1429 #endif /* VSTART */
1430 #ifdef VSTOP
1431 tty.main.c_cc[VSTOP] = CDISABLE;
1432 #endif /* VSTOP */
1433 }
1434 #endif /* mips or HAVE_TCATTR */
1435
1436 #ifdef SET_LINE_DISCIPLINE
1437 /* Need to explicitly request TERMIODISC line discipline or
1438 Ultrix's termios does not work correctly. */
1439 tty.main.c_line = SET_LINE_DISCIPLINE;
1440 #endif
1441 #ifdef AIX
1442 #ifndef IBMR2AIX
1443 /* AIX enhanced edit loses NULs, so disable it. */
1444 tty.main.c_line = 0;
1445 tty.main.c_iflag &= ~ASCEDIT;
1446 #else
1447 tty.main.c_cc[VSTRT] = 255;
1448 tty.main.c_cc[VSTOP] = 255;
1449 tty.main.c_cc[VSUSP] = 255;
1450 tty.main.c_cc[VDSUSP] = 255;
1451 #endif /* IBMR2AIX */
1452 if (flow_control)
1453 {
1454 #ifdef VSTART
1455 tty.main.c_cc[VSTART] = '\021';
1456 #endif /* VSTART */
1457 #ifdef VSTOP
1458 tty.main.c_cc[VSTOP] = '\023';
1459 #endif /* VSTOP */
1460 }
1461 /* Also, PTY overloads NUL and BREAK.
1462 don't ignore break, but don't signal either, so it looks like NUL.
1463 This really serves a purpose only if running in an XTERM window
1464 or via TELNET or the like, but does no harm elsewhere. */
1465 tty.main.c_iflag &= ~IGNBRK;
1466 tty.main.c_iflag &= ~BRKINT;
1467 #endif
1468 #else /* if not HAVE_TERMIO */
1469 #ifdef VMS
1470 tty.main.tt_char |= TT$M_NOECHO;
1471 if (meta_key)
1472 tty.main.tt_char |= TT$M_EIGHTBIT;
1473 if (flow_control)
1474 tty.main.tt_char |= TT$M_TTSYNC;
1475 else
1476 tty.main.tt_char &= ~TT$M_TTSYNC;
1477 tty.main.tt2_char |= TT2$M_PASTHRU | TT2$M_XON;
1478 #else /* not VMS (BSD, that is) */
1479 #ifndef DOS_NT
1480 XSETINT (Vtty_erase_char, tty.main.sg_erase);
1481 tty.main.sg_flags &= ~(ECHO | CRMOD | XTABS);
1482 if (meta_key)
1483 tty.main.sg_flags |= ANYP;
1484 tty.main.sg_flags |= interrupt_input ? RAW : CBREAK;
1485 #endif /* not DOS_NT */
1486 #endif /* not VMS (BSD, that is) */
1487 #endif /* not HAVE_TERMIO */
1488
1489 /* If going to use CBREAK mode, we must request C-g to interrupt
1490 and turn off start and stop chars, etc. If not going to use
1491 CBREAK mode, do this anyway so as to turn off local flow
1492 control for user coming over network on 4.2; in this case,
1493 only t_stopc and t_startc really matter. */
1494 #ifndef HAVE_TERMIO
1495 #ifdef HAVE_TCHARS
1496 /* Note: if not using CBREAK mode, it makes no difference how we
1497 set this */
1498 tty.tchars = new_tchars;
1499 tty.tchars.t_intrc = quit_char;
1500 if (flow_control)
1501 {
1502 tty.tchars.t_startc = '\021';
1503 tty.tchars.t_stopc = '\023';
1504 }
1505
1506 tty.lmode = LDECCTQ | LLITOUT | LPASS8 | LNOFLSH | old_tty.lmode;
1507 #ifdef ultrix
1508 /* Under Ultrix 4.2a, leaving this out doesn't seem to hurt
1509 anything, and leaving it in breaks the meta key. Go figure. */
1510 tty.lmode &= ~LLITOUT;
1511 #endif
1512
1513 #ifdef BSD4_1
1514 lmode = tty.lmode;
1515 #endif
1516
1517 #endif /* HAVE_TCHARS */
1518 #endif /* not HAVE_TERMIO */
1519
1520 #ifdef HAVE_LTCHARS
1521 tty.ltchars = new_ltchars;
1522 #endif /* HAVE_LTCHARS */
1523 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida, MW Aug 1993 */
1524 if (!term_initted)
1525 internal_terminal_init ();
1526 dos_ttraw ();
1527 #endif
1528
1529 EMACS_SET_TTY (input_fd, &tty, 0);
1530
1531 /* This code added to insure that, if flow-control is not to be used,
1532 we have an unlocked terminal at the start. */
1533
1534 #ifdef TCXONC
1535 if (!flow_control) ioctl (input_fd, TCXONC, 1);
1536 #endif
1537 #ifndef APOLLO
1538 #ifdef TIOCSTART
1539 if (!flow_control) ioctl (input_fd, TIOCSTART, 0);
1540 #endif
1541 #endif
1542
1543 #if defined (HAVE_TERMIOS) || defined (HPUX9)
1544 #ifdef TCOON
1545 if (!flow_control) tcflow (input_fd, TCOON);
1546 #endif
1547 #endif
1548
1549 #ifdef AIXHFT
1550 hft_init ();
1551 #ifdef IBMR2AIX
1552 {
1553 /* IBM's HFT device usually thinks a ^J should be LF/CR. We need it
1554 to be only LF. This is the way that is done. */
1555 struct termio tty;
1556
1557 if (ioctl (1, HFTGETID, &tty) != -1)
1558 write (1, "\033[20l", 5);
1559 }
1560 #endif
1561 #endif /* AIXHFT */
1562
1563 #ifdef VMS
1564 /* Appears to do nothing when in PASTHRU mode.
1565 SYS$QIOW (0, input_fd, IO$_SETMODE|IO$M_OUTBAND, 0, 0, 0,
1566 interrupt_signal, oob_chars, 0, 0, 0, 0);
1567 */
1568 queue_kbd_input (0);
1569 #endif /* VMS */
1570 }
1571
1572 #ifdef F_SETFL
1573 #ifndef F_SETOWN_BUG
1574 #ifdef F_GETOWN /* F_SETFL does not imply existence of F_GETOWN */
1575 if (interrupt_input
1576 && ! read_socket_hook && EQ (Vwindow_system, Qnil))
1577 {
1578 old_fcntl_owner = fcntl (input_fd, F_GETOWN, 0);
1579 fcntl (input_fd, F_SETOWN, getpid ());
1580 init_sigio (input_fd);
1581 }
1582 #endif /* F_GETOWN */
1583 #endif /* F_SETOWN_BUG */
1584 #endif /* F_SETFL */
1585
1586 #ifdef BSD4_1
1587 if (interrupt_input)
1588 init_sigio (input_fd);
1589 #endif
1590
1591 #ifdef VMS /* VMS sometimes has this symbol but lacks setvbuf. */
1592 #undef _IOFBF
1593 #endif
1594 #ifdef _IOFBF
1595 /* This symbol is defined on recent USG systems.
1596 Someone says without this call USG won't really buffer the file
1597 even with a call to setbuf. */
1598 setvbuf (stdout, (char *) _sobuf, _IOFBF, sizeof _sobuf);
1599 #else
1600 setbuf (stdout, (char *) _sobuf);
1601 #endif
1602 #ifdef HAVE_WINDOW_SYSTEM
1603 /* Emacs' window system on MSDOG uses the `internal terminal' and therefore
1604 needs the initialization code below. */
1605 if (EQ (Vwindow_system, Qnil)
1606 #ifndef WINDOWSNT
1607 /* When running in tty mode on NT/Win95, we have a read_socket
1608 hook, but still need the rest of the initialization code below. */
1609 && (! read_socket_hook)
1610 #endif
1611 )
1612 #endif
1613 set_terminal_modes ();
1614
1615 if (!term_initted
1616 && FRAMEP (Vterminal_frame)
1617 && FRAME_TERMCAP_P (XFRAME (Vterminal_frame)))
1618 init_frame_faces (XFRAME (Vterminal_frame));
1619
1620 if (term_initted && no_redraw_on_reenter)
1621 {
1622 if (display_completed)
1623 direct_output_forward_char (0);
1624 }
1625 else
1626 {
1627 frame_garbaged = 1;
1628 if (FRAMEP (Vterminal_frame))
1629 FRAME_GARBAGED_P (XFRAME (Vterminal_frame)) = 1;
1630 }
1631
1632 term_initted = 1;
1633 }
1634
1635 /* Return nonzero if safe to use tabs in output.
1636 At the time this is called, init_sys_modes has not been done yet. */
1637
1638 int
1639 tabs_safe_p ()
1640 {
1641 struct emacs_tty tty;
1642
1643 EMACS_GET_TTY (input_fd, &tty);
1644 return EMACS_TTY_TABS_OK (&tty);
1645 }
1646 \f
1647 /* Get terminal size from system.
1648 Store number of lines into *HEIGHTP and width into *WIDTHP.
1649 We store 0 if there's no valid information. */
1650
1651 void
1652 get_frame_size (widthp, heightp)
1653 int *widthp, *heightp;
1654 {
1655
1656 #ifdef TIOCGWINSZ
1657
1658 /* BSD-style. */
1659 struct winsize size;
1660
1661 if (ioctl (input_fd, TIOCGWINSZ, &size) == -1)
1662 *widthp = *heightp = 0;
1663 else
1664 {
1665 *widthp = size.ws_col;
1666 *heightp = size.ws_row;
1667 }
1668
1669 #else
1670 #ifdef TIOCGSIZE
1671
1672 /* SunOS - style. */
1673 struct ttysize size;
1674
1675 if (ioctl (input_fd, TIOCGSIZE, &size) == -1)
1676 *widthp = *heightp = 0;
1677 else
1678 {
1679 *widthp = size.ts_cols;
1680 *heightp = size.ts_lines;
1681 }
1682
1683 #else
1684 #ifdef VMS
1685
1686 struct sensemode tty;
1687
1688 SYS$QIOW (0, input_fd, IO$_SENSEMODE, &tty, 0, 0,
1689 &tty.class, 12, 0, 0, 0, 0);
1690 *widthp = tty.scr_wid;
1691 *heightp = tty.scr_len;
1692
1693 #else
1694 #ifdef MSDOS
1695 *widthp = ScreenCols ();
1696 *heightp = ScreenRows ();
1697 #else /* system doesn't know size */
1698 *widthp = 0;
1699 *heightp = 0;
1700 #endif
1701
1702 #endif /* not VMS */
1703 #endif /* not SunOS-style */
1704 #endif /* not BSD-style */
1705 }
1706
1707 /* Set the logical window size associated with descriptor FD
1708 to HEIGHT and WIDTH. This is used mainly with ptys. */
1709
1710 int
1711 set_window_size (fd, height, width)
1712 int fd, height, width;
1713 {
1714 #ifdef TIOCSWINSZ
1715
1716 /* BSD-style. */
1717 struct winsize size;
1718 size.ws_row = height;
1719 size.ws_col = width;
1720
1721 if (ioctl (fd, TIOCSWINSZ, &size) == -1)
1722 return 0; /* error */
1723 else
1724 return 1;
1725
1726 #else
1727 #ifdef TIOCSSIZE
1728
1729 /* SunOS - style. */
1730 struct ttysize size;
1731 size.ts_lines = height;
1732 size.ts_cols = width;
1733
1734 if (ioctl (fd, TIOCGSIZE, &size) == -1)
1735 return 0;
1736 else
1737 return 1;
1738 #else
1739 return -1;
1740 #endif /* not SunOS-style */
1741 #endif /* not BSD-style */
1742 }
1743
1744 \f
1745 /* Prepare the terminal for exiting Emacs; move the cursor to the
1746 bottom of the frame, turn off interrupt-driven I/O, etc. */
1747 void
1748 reset_sys_modes ()
1749 {
1750 struct frame *sf;
1751
1752 if (noninteractive)
1753 {
1754 fflush (stdout);
1755 return;
1756 }
1757 if (!term_initted)
1758 return;
1759 #ifdef HAVE_WINDOW_SYSTEM
1760 /* Emacs' window system on MSDOG uses the `internal terminal' and therefore
1761 needs the clean-up code below. */
1762 if (!EQ (Vwindow_system, Qnil)
1763 #ifndef WINDOWSNT
1764 /* When running in tty mode on NT/Win95, we have a read_socket
1765 hook, but still need the rest of the clean-up code below. */
1766 || read_socket_hook
1767 #endif
1768 )
1769 return;
1770 #endif
1771 sf = SELECTED_FRAME ();
1772 cursor_to (FRAME_HEIGHT (sf) - 1, 0);
1773 clear_end_of_line (FRAME_WIDTH (sf));
1774 /* clear_end_of_line may move the cursor */
1775 cursor_to (FRAME_HEIGHT (sf) - 1, 0);
1776 #if defined (IBMR2AIX) && defined (AIXHFT)
1777 {
1778 /* HFT devices normally use ^J as a LF/CR. We forced it to
1779 do the LF only. Now, we need to reset it. */
1780 struct termio tty;
1781
1782 if (ioctl (1, HFTGETID, &tty) != -1)
1783 write (1, "\033[20h", 5);
1784 }
1785 #endif
1786
1787 reset_terminal_modes ();
1788 fflush (stdout);
1789 #ifdef BSD_SYSTEM
1790 #ifndef BSD4_1
1791 /* Avoid possible loss of output when changing terminal modes. */
1792 fsync (fileno (stdout));
1793 #endif
1794 #endif
1795
1796 #ifdef F_SETFL
1797 #ifndef F_SETOWN_BUG
1798 #ifdef F_SETOWN /* F_SETFL does not imply existence of F_SETOWN */
1799 if (interrupt_input)
1800 {
1801 reset_sigio ();
1802 fcntl (input_fd, F_SETOWN, old_fcntl_owner);
1803 }
1804 #endif /* F_SETOWN */
1805 #endif /* F_SETOWN_BUG */
1806 #ifdef O_NDELAY
1807 fcntl (input_fd, F_SETFL, fcntl (input_fd, F_GETFL, 0) & ~O_NDELAY);
1808 #endif
1809 #endif /* F_SETFL */
1810 #ifdef BSD4_1
1811 if (interrupt_input)
1812 reset_sigio ();
1813 #endif /* BSD4_1 */
1814
1815 if (old_tty_valid)
1816 while (EMACS_SET_TTY (input_fd, &old_tty, 0) < 0 && errno == EINTR)
1817 ;
1818
1819 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */
1820 dos_ttcooked ();
1821 #endif
1822
1823 #ifdef SET_LINE_DISCIPLINE
1824 /* Ultrix's termios *ignores* any line discipline except TERMIODISC.
1825 A different old line discipline is therefore not restored, yet.
1826 Restore the old line discipline by hand. */
1827 ioctl (0, TIOCSETD, &old_tty.main.c_line);
1828 #endif
1829
1830 #ifdef AIXHFT
1831 hft_reset ();
1832 #endif
1833
1834 #ifdef BSD_PGRPS
1835 widen_foreground_group ();
1836 #endif
1837 }
1838 \f
1839 #ifdef HAVE_PTYS
1840
1841 /* Set up the proper status flags for use of a pty. */
1842
1843 void
1844 setup_pty (fd)
1845 int fd;
1846 {
1847 /* I'm told that TOICREMOTE does not mean control chars
1848 "can't be sent" but rather that they don't have
1849 input-editing or signaling effects.
1850 That should be good, because we have other ways
1851 to do those things in Emacs.
1852 However, telnet mode seems not to work on 4.2.
1853 So TIOCREMOTE is turned off now. */
1854
1855 /* Under hp-ux, if TIOCREMOTE is turned on, some calls
1856 will hang. In particular, the "timeout" feature (which
1857 causes a read to return if there is no data available)
1858 does this. Also it is known that telnet mode will hang
1859 in such a way that Emacs must be stopped (perhaps this
1860 is the same problem).
1861
1862 If TIOCREMOTE is turned off, then there is a bug in
1863 hp-ux which sometimes loses data. Apparently the
1864 code which blocks the master process when the internal
1865 buffer fills up does not work. Other than this,
1866 though, everything else seems to work fine.
1867
1868 Since the latter lossage is more benign, we may as well
1869 lose that way. -- cph */
1870 #ifdef FIONBIO
1871 #if defined(SYSV_PTYS) || defined(UNIX98_PTYS)
1872 {
1873 int on = 1;
1874 ioctl (fd, FIONBIO, &on);
1875 }
1876 #endif
1877 #endif
1878 #ifdef IBMRTAIX
1879 /* On AIX, the parent gets SIGHUP when a pty attached child dies. So, we */
1880 /* ignore SIGHUP once we've started a child on a pty. Note that this may */
1881 /* cause EMACS not to die when it should, i.e., when its own controlling */
1882 /* tty goes away. I've complained to the AIX developers, and they may */
1883 /* change this behavior, but I'm not going to hold my breath. */
1884 signal (SIGHUP, SIG_IGN);
1885 #endif
1886 }
1887 #endif /* HAVE_PTYS */
1888 \f
1889 #ifdef VMS
1890
1891 /* Assigning an input channel is done at the start of Emacs execution.
1892 This is called each time Emacs is resumed, also, but does nothing
1893 because input_chain is no longer zero. */
1894
1895 void
1896 init_vms_input ()
1897 {
1898 int status;
1899
1900 if (input_fd == 0)
1901 {
1902 status = SYS$ASSIGN (&input_dsc, &input_fd, 0, 0);
1903 if (! (status & 1))
1904 LIB$STOP (status);
1905 }
1906 }
1907
1908 /* Deassigning the input channel is done before exiting. */
1909
1910 void
1911 stop_vms_input ()
1912 {
1913 return SYS$DASSGN (input_fd);
1914 }
1915
1916 short input_buffer;
1917
1918 /* Request reading one character into the keyboard buffer.
1919 This is done as soon as the buffer becomes empty. */
1920
1921 void
1922 queue_kbd_input ()
1923 {
1924 int status;
1925 extern kbd_input_ast ();
1926
1927 waiting_for_ast = 0;
1928 stop_input = 0;
1929 status = SYS$QIO (0, input_fd, IO$_READVBLK,
1930 &input_iosb, kbd_input_ast, 1,
1931 &input_buffer, 1, 0, terminator_mask, 0, 0);
1932 }
1933
1934 int input_count;
1935
1936 /* Ast routine that is called when keyboard input comes in
1937 in accord with the SYS$QIO above. */
1938
1939 void
1940 kbd_input_ast ()
1941 {
1942 register int c = -1;
1943 int old_errno = errno;
1944 extern EMACS_TIME *input_available_clear_time;
1945
1946 if (waiting_for_ast)
1947 SYS$SETEF (input_ef);
1948 waiting_for_ast = 0;
1949 input_count++;
1950 #ifdef ASTDEBUG
1951 if (input_count == 25)
1952 exit (1);
1953 printf ("Ast # %d,", input_count);
1954 printf (" iosb = %x, %x, %x, %x",
1955 input_iosb.offset, input_iosb.status, input_iosb.termlen,
1956 input_iosb.term);
1957 #endif
1958 if (input_iosb.offset)
1959 {
1960 c = input_buffer;
1961 #ifdef ASTDEBUG
1962 printf (", char = 0%o", c);
1963 #endif
1964 }
1965 #ifdef ASTDEBUG
1966 printf ("\n");
1967 fflush (stdout);
1968 sleep (1);
1969 #endif
1970 if (! stop_input)
1971 queue_kbd_input ();
1972 if (c >= 0)
1973 {
1974 struct input_event e;
1975 e.kind = ascii_keystroke;
1976 XSETINT (e.code, c);
1977 e.frame_or_window = selected_frame;
1978 kbd_buffer_store_event (&e);
1979 }
1980 if (input_available_clear_time)
1981 EMACS_SET_SECS_USECS (*input_available_clear_time, 0, 0);
1982 errno = old_errno;
1983 }
1984
1985 /* Wait until there is something in kbd_buffer. */
1986
1987 void
1988 wait_for_kbd_input ()
1989 {
1990 extern int have_process_input, process_exited;
1991
1992 /* If already something, avoid doing system calls. */
1993 if (detect_input_pending ())
1994 {
1995 return;
1996 }
1997 /* Clear a flag, and tell ast routine above to set it. */
1998 SYS$CLREF (input_ef);
1999 waiting_for_ast = 1;
2000 /* Check for timing error: ast happened while we were doing that. */
2001 if (!detect_input_pending ())
2002 {
2003 /* No timing error: wait for flag to be set. */
2004 set_waiting_for_input (0);
2005 SYS$WFLOR (input_ef, input_eflist);
2006 clear_waiting_for_input (0);
2007 if (!detect_input_pending ())
2008 /* Check for subprocess input availability */
2009 {
2010 int dsp = have_process_input || process_exited;
2011
2012 SYS$CLREF (process_ef);
2013 if (have_process_input)
2014 process_command_input ();
2015 if (process_exited)
2016 process_exit ();
2017 if (dsp)
2018 {
2019 update_mode_lines++;
2020 prepare_menu_bars ();
2021 redisplay_preserve_echo_area ();
2022 }
2023 }
2024 }
2025 waiting_for_ast = 0;
2026 }
2027
2028 /* Get rid of any pending QIO, when we are about to suspend
2029 or when we want to throw away pending input.
2030 We wait for a positive sign that the AST routine has run
2031 and therefore there is no I/O request queued when we return.
2032 SYS$SETAST is used to avoid a timing error. */
2033
2034 void
2035 end_kbd_input ()
2036 {
2037 #ifdef ASTDEBUG
2038 printf ("At end_kbd_input.\n");
2039 fflush (stdout);
2040 sleep (1);
2041 #endif
2042 if (LIB$AST_IN_PROG ()) /* Don't wait if suspending from kbd_buffer_store_event! */
2043 {
2044 SYS$CANCEL (input_fd);
2045 return;
2046 }
2047
2048 SYS$SETAST (0);
2049 /* Clear a flag, and tell ast routine above to set it. */
2050 SYS$CLREF (input_ef);
2051 waiting_for_ast = 1;
2052 stop_input = 1;
2053 SYS$CANCEL (input_fd);
2054 SYS$SETAST (1);
2055 SYS$WAITFR (input_ef);
2056 waiting_for_ast = 0;
2057 }
2058
2059 /* Wait for either input available or time interval expiry. */
2060
2061 void
2062 input_wait_timeout (timeval)
2063 int timeval; /* Time to wait, in seconds */
2064 {
2065 int time [2];
2066 static int zero = 0;
2067 static int large = -10000000;
2068
2069 LIB$EMUL (&timeval, &large, &zero, time); /* Convert to VMS format */
2070
2071 /* If already something, avoid doing system calls. */
2072 if (detect_input_pending ())
2073 {
2074 return;
2075 }
2076 /* Clear a flag, and tell ast routine above to set it. */
2077 SYS$CLREF (input_ef);
2078 waiting_for_ast = 1;
2079 /* Check for timing error: ast happened while we were doing that. */
2080 if (!detect_input_pending ())
2081 {
2082 /* No timing error: wait for flag to be set. */
2083 SYS$CANTIM (1, 0);
2084 if (SYS$SETIMR (timer_ef, time, 0, 1) & 1) /* Set timer */
2085 SYS$WFLOR (timer_ef, timer_eflist); /* Wait for timer expiry or input */
2086 }
2087 waiting_for_ast = 0;
2088 }
2089
2090 /* The standard `sleep' routine works some other way
2091 and it stops working if you have ever quit out of it.
2092 This one continues to work. */
2093
2094 sys_sleep (timeval)
2095 int timeval;
2096 {
2097 int time [2];
2098 static int zero = 0;
2099 static int large = -10000000;
2100
2101 LIB$EMUL (&timeval, &large, &zero, time); /* Convert to VMS format */
2102
2103 SYS$CANTIM (1, 0);
2104 if (SYS$SETIMR (timer_ef, time, 0, 1) & 1) /* Set timer */
2105 SYS$WAITFR (timer_ef); /* Wait for timer expiry only */
2106 }
2107
2108 void
2109 init_sigio (fd)
2110 int fd;
2111 {
2112 request_sigio ();
2113 }
2114
2115 reset_sigio ()
2116 {
2117 unrequest_sigio ();
2118 }
2119
2120 void
2121 request_sigio ()
2122 {
2123 croak ("request sigio");
2124 }
2125
2126 void
2127 unrequest_sigio ()
2128 {
2129 croak ("unrequest sigio");
2130 }
2131
2132 #endif /* VMS */
2133 \f
2134 /* Note that VMS compiler won't accept defined (CANNOT_DUMP). */
2135 #ifndef CANNOT_DUMP
2136 #define NEED_STARTS
2137 #endif
2138
2139 #ifndef SYSTEM_MALLOC
2140 #ifndef NEED_STARTS
2141 #define NEED_STARTS
2142 #endif
2143 #endif
2144
2145 #ifdef NEED_STARTS
2146 /* Some systems that cannot dump also cannot implement these. */
2147
2148 /*
2149 * Return the address of the start of the text segment prior to
2150 * doing an unexec. After unexec the return value is undefined.
2151 * See crt0.c for further explanation and _start.
2152 *
2153 */
2154
2155 #if !(defined (__NetBSD__) && defined (__ELF__))
2156 #ifndef HAVE_TEXT_START
2157 char *
2158 start_of_text ()
2159 {
2160 #ifdef TEXT_START
2161 return ((char *) TEXT_START);
2162 #else
2163 #ifdef GOULD
2164 extern csrt ();
2165 return ((char *) csrt);
2166 #else /* not GOULD */
2167 extern int _start ();
2168 return ((char *) _start);
2169 #endif /* GOULD */
2170 #endif /* TEXT_START */
2171 }
2172 #endif /* not HAVE_TEXT_START */
2173 #endif
2174
2175 /*
2176 * Return the address of the start of the data segment prior to
2177 * doing an unexec. After unexec the return value is undefined.
2178 * See crt0.c for further information and definition of data_start.
2179 *
2180 * Apparently, on BSD systems this is etext at startup. On
2181 * USG systems (swapping) this is highly mmu dependent and
2182 * is also dependent on whether or not the program is running
2183 * with shared text. Generally there is a (possibly large)
2184 * gap between end of text and start of data with shared text.
2185 *
2186 * On Uniplus+ systems with shared text, data starts at a
2187 * fixed address. Each port (from a given oem) is generally
2188 * different, and the specific value of the start of data can
2189 * be obtained via the UniPlus+ specific "uvar" system call,
2190 * however the method outlined in crt0.c seems to be more portable.
2191 *
2192 * Probably what will have to happen when a USG unexec is available,
2193 * at least on UniPlus, is temacs will have to be made unshared so
2194 * that text and data are contiguous. Then once loadup is complete,
2195 * unexec will produce a shared executable where the data can be
2196 * at the normal shared text boundary and the startofdata variable
2197 * will be patched by unexec to the correct value.
2198 *
2199 */
2200
2201 char *
2202 start_of_data ()
2203 {
2204 #ifdef DATA_START
2205 return ((char *) DATA_START);
2206 #else
2207 #ifdef ORDINARY_LINK
2208 /*
2209 * This is a hack. Since we're not linking crt0.c or pre_crt0.c,
2210 * data_start isn't defined. We take the address of environ, which
2211 * is known to live at or near the start of the system crt0.c, and
2212 * we don't sweat the handful of bytes that might lose.
2213 */
2214 extern char **environ;
2215
2216 return ((char *) &environ);
2217 #else
2218 extern int data_start;
2219 return ((char *) &data_start);
2220 #endif /* ORDINARY_LINK */
2221 #endif /* DATA_START */
2222 }
2223 #endif /* NEED_STARTS (not CANNOT_DUMP or not SYSTEM_MALLOC) */
2224
2225 #ifndef CANNOT_DUMP
2226 /* Some systems that cannot dump also cannot implement these. */
2227
2228 /*
2229 * Return the address of the end of the text segment prior to
2230 * doing an unexec. After unexec the return value is undefined.
2231 */
2232
2233 char *
2234 end_of_text ()
2235 {
2236 #ifdef TEXT_END
2237 return ((char *) TEXT_END);
2238 #else
2239 extern int etext;
2240 return ((char *) &etext);
2241 #endif
2242 }
2243
2244 /*
2245 * Return the address of the end of the data segment prior to
2246 * doing an unexec. After unexec the return value is undefined.
2247 */
2248
2249 char *
2250 end_of_data ()
2251 {
2252 #ifdef DATA_END
2253 return ((char *) DATA_END);
2254 #else
2255 extern int edata;
2256 return ((char *) &edata);
2257 #endif
2258 }
2259
2260 #endif /* not CANNOT_DUMP */
2261 \f
2262 /* init_system_name sets up the string for the Lisp function
2263 system-name to return. */
2264
2265 #ifdef BSD4_1
2266 #include <whoami.h>
2267 #endif
2268
2269 extern Lisp_Object Vsystem_name;
2270
2271 #ifndef BSD4_1
2272 #ifndef VMS
2273 #ifdef HAVE_SOCKETS
2274 #include <sys/socket.h>
2275 #include <netdb.h>
2276 #endif /* HAVE_SOCKETS */
2277 #endif /* not VMS */
2278 #endif /* not BSD4_1 */
2279
2280 #ifdef TRY_AGAIN
2281 #ifndef HAVE_H_ERRNO
2282 extern int h_errno;
2283 #endif
2284 #endif /* TRY_AGAIN */
2285
2286 void
2287 init_system_name ()
2288 {
2289 #ifdef BSD4_1
2290 Vsystem_name = build_string (sysname);
2291 #else
2292 #ifdef VMS
2293 char *sp, *end;
2294 if ((sp = egetenv ("SYS$NODE")) == 0)
2295 Vsystem_name = build_string ("vax-vms");
2296 else if ((end = index (sp, ':')) == 0)
2297 Vsystem_name = build_string (sp);
2298 else
2299 Vsystem_name = make_string (sp, end - sp);
2300 #else
2301 #ifndef HAVE_GETHOSTNAME
2302 struct utsname uts;
2303 uname (&uts);
2304 Vsystem_name = build_string (uts.nodename);
2305 #else /* HAVE_GETHOSTNAME */
2306 unsigned int hostname_size = 256;
2307 char *hostname = (char *) alloca (hostname_size);
2308
2309 /* Try to get the host name; if the buffer is too short, try
2310 again. Apparently, the only indication gethostname gives of
2311 whether the buffer was large enough is the presence or absence
2312 of a '\0' in the string. Eech. */
2313 for (;;)
2314 {
2315 gethostname (hostname, hostname_size - 1);
2316 hostname[hostname_size - 1] = '\0';
2317
2318 /* Was the buffer large enough for the '\0'? */
2319 if (strlen (hostname) < hostname_size - 1)
2320 break;
2321
2322 hostname_size <<= 1;
2323 hostname = (char *) alloca (hostname_size);
2324 }
2325 #ifdef HAVE_SOCKETS
2326 /* Turn the hostname into the official, fully-qualified hostname.
2327 Don't do this if we're going to dump; this can confuse system
2328 libraries on some machines and make the dumped emacs core dump. */
2329 #ifndef CANNOT_DUMP
2330 if (initialized)
2331 #endif /* not CANNOT_DUMP */
2332 if (! index (hostname, '.'))
2333 {
2334 struct hostent *hp;
2335 int count;
2336 for (count = 0;; count++)
2337 {
2338 #ifdef TRY_AGAIN
2339 h_errno = 0;
2340 #endif
2341 hp = gethostbyname (hostname);
2342 #ifdef TRY_AGAIN
2343 if (! (hp == 0 && h_errno == TRY_AGAIN))
2344 #endif
2345 break;
2346 if (count >= 5)
2347 break;
2348 Fsleep_for (make_number (1), Qnil);
2349 }
2350 if (hp)
2351 {
2352 char *fqdn = (char *) hp->h_name;
2353 char *p;
2354
2355 if (!index (fqdn, '.'))
2356 {
2357 /* We still don't have a fully qualified domain name.
2358 Try to find one in the list of alternate names */
2359 char **alias = hp->h_aliases;
2360 while (*alias && !index (*alias, '.'))
2361 alias++;
2362 if (*alias)
2363 fqdn = *alias;
2364 }
2365 hostname = fqdn;
2366 #if 0
2367 /* Convert the host name to lower case. */
2368 /* Using ctype.h here would introduce a possible locale
2369 dependence that is probably wrong for hostnames. */
2370 p = hostname;
2371 while (*p)
2372 {
2373 if (*p >= 'A' && *p <= 'Z')
2374 *p += 'a' - 'A';
2375 p++;
2376 }
2377 #endif
2378 }
2379 }
2380 #endif /* HAVE_SOCKETS */
2381 /* We used to try using getdomainname here,
2382 but NIIBE Yutaka <gniibe@etl.go.jp> says that
2383 getdomainname gets the NIS/YP domain which often is not the same
2384 as in Internet domain name. */
2385 #if 0 /* Turned off because sysinfo is not really likely to return the
2386 correct Internet domain. */
2387 #if (HAVE_SYSINFO && defined (SI_SRPC_DOMAIN))
2388 if (! index (hostname, '.'))
2389 {
2390 /* The hostname is not fully qualified. Append the domain name. */
2391
2392 int hostlen = strlen (hostname);
2393 int domain_size = 256;
2394
2395 for (;;)
2396 {
2397 char *domain = (char *) alloca (domain_size + 1);
2398 char *fqdn = (char *) alloca (hostlen + 1 + domain_size + 1);
2399 int sys_domain_size = sysinfo (SI_SRPC_DOMAIN, domain, domain_size);
2400 if (sys_domain_size <= 0)
2401 break;
2402 if (domain_size < sys_domain_size)
2403 {
2404 domain_size = sys_domain_size;
2405 continue;
2406 }
2407 strcpy (fqdn, hostname);
2408 if (domain[0] == '.')
2409 strcpy (fqdn + hostlen, domain);
2410 else if (domain[0] != 0)
2411 {
2412 fqdn[hostlen] = '.';
2413 strcpy (fqdn + hostlen + 1, domain);
2414 }
2415 hostname = fqdn;
2416 break;
2417 }
2418 }
2419 #endif /* HAVE_SYSINFO && defined (SI_SRPC_DOMAIN) */
2420 #endif /* 0 */
2421 Vsystem_name = build_string (hostname);
2422 #endif /* HAVE_GETHOSTNAME */
2423 #endif /* VMS */
2424 #endif /* BSD4_1 */
2425 {
2426 unsigned char *p;
2427 for (p = XSTRING (Vsystem_name)->data; *p; p++)
2428 if (*p == ' ' || *p == '\t')
2429 *p = '-';
2430 }
2431 }
2432 \f
2433 #ifndef MSDOS
2434 #ifndef VMS
2435 #if !defined (HAVE_SELECT) || defined (BROKEN_SELECT_NON_X)
2436
2437 #include "sysselect.h"
2438 #undef select
2439
2440 #if defined (HAVE_X_WINDOWS) && !defined (HAVE_SELECT)
2441 /* Cause explanatory error message at compile time,
2442 since the select emulation is not good enough for X. */
2443 int *x = &x_windows_lose_if_no_select_system_call;
2444 #endif
2445
2446 /* Emulate as much as select as is possible under 4.1 and needed by Gnu Emacs
2447 * Only checks read descriptors.
2448 */
2449 /* How long to wait between checking fds in select */
2450 #define SELECT_PAUSE 1
2451 int select_alarmed;
2452
2453 /* For longjmp'ing back to read_input_waiting. */
2454
2455 jmp_buf read_alarm_throw;
2456
2457 /* Nonzero if the alarm signal should throw back to read_input_waiting.
2458 The read_socket_hook function sets this to 1 while it is waiting. */
2459
2460 int read_alarm_should_throw;
2461
2462 SIGTYPE
2463 select_alarm ()
2464 {
2465 select_alarmed = 1;
2466 #ifdef BSD4_1
2467 sigrelse (SIGALRM);
2468 #else /* not BSD4_1 */
2469 signal (SIGALRM, SIG_IGN);
2470 #endif /* not BSD4_1 */
2471 if (read_alarm_should_throw)
2472 longjmp (read_alarm_throw, 1);
2473 }
2474
2475 #ifndef WINDOWSNT
2476 /* Only rfds are checked. */
2477 int
2478 sys_select (nfds, rfds, wfds, efds, timeout)
2479 int nfds;
2480 SELECT_TYPE *rfds, *wfds, *efds;
2481 EMACS_TIME *timeout;
2482 {
2483 int ravail = 0;
2484 SELECT_TYPE orfds;
2485 int timeoutval;
2486 int *local_timeout;
2487 extern int proc_buffered_char[];
2488 #ifndef subprocesses
2489 int process_tick = 0, update_tick = 0;
2490 #else
2491 extern int process_tick, update_tick;
2492 #endif
2493 unsigned char buf;
2494
2495 #if defined (HAVE_SELECT) && defined (HAVE_X_WINDOWS)
2496 /* If we're using X, then the native select will work; we only need the
2497 emulation for non-X usage. */
2498 if (!NILP (Vwindow_system))
2499 return select (nfds, rfds, wfds, efds, timeout);
2500 #endif
2501 timeoutval = timeout ? EMACS_SECS (*timeout) : 100000;
2502 local_timeout = &timeoutval;
2503 FD_ZERO (&orfds);
2504 if (rfds)
2505 {
2506 orfds = *rfds;
2507 FD_ZERO (rfds);
2508 }
2509 if (wfds)
2510 FD_ZERO (wfds);
2511 if (efds)
2512 FD_ZERO (efds);
2513
2514 /* If we are looking only for the terminal, with no timeout,
2515 just read it and wait -- that's more efficient. */
2516 if (*local_timeout == 100000 && process_tick == update_tick
2517 && FD_ISSET (0, &orfds))
2518 {
2519 int fd;
2520 for (fd = 1; fd < nfds; ++fd)
2521 if (FD_ISSET (fd, &orfds))
2522 goto hardway;
2523 if (! detect_input_pending ())
2524 read_input_waiting ();
2525 FD_SET (0, rfds);
2526 return 1;
2527 }
2528
2529 hardway:
2530 /* Once a second, till the timer expires, check all the flagged read
2531 * descriptors to see if any input is available. If there is some then
2532 * set the corresponding bit in the return copy of rfds.
2533 */
2534 while (1)
2535 {
2536 register int to_check, fd;
2537
2538 if (rfds)
2539 {
2540 for (to_check = nfds, fd = 0; --to_check >= 0; fd++)
2541 {
2542 if (FD_ISSET (fd, &orfds))
2543 {
2544 int avail = 0, status = 0;
2545
2546 if (fd == 0)
2547 avail = detect_input_pending (); /* Special keyboard handler */
2548 else
2549 {
2550 #ifdef FIONREAD
2551 status = ioctl (fd, FIONREAD, &avail);
2552 #else /* no FIONREAD */
2553 /* Hoping it will return -1 if nothing available
2554 or 0 if all 0 chars requested are read. */
2555 if (proc_buffered_char[fd] >= 0)
2556 avail = 1;
2557 else
2558 {
2559 avail = read (fd, &buf, 1);
2560 if (avail > 0)
2561 proc_buffered_char[fd] = buf;
2562 }
2563 #endif /* no FIONREAD */
2564 }
2565 if (status >= 0 && avail > 0)
2566 {
2567 FD_SET (fd, rfds);
2568 ravail++;
2569 }
2570 }
2571 }
2572 }
2573 if (*local_timeout == 0 || ravail != 0 || process_tick != update_tick)
2574 break;
2575
2576 turn_on_atimers (0);
2577 signal (SIGALRM, select_alarm);
2578 select_alarmed = 0;
2579 alarm (SELECT_PAUSE);
2580
2581 /* Wait for a SIGALRM (or maybe a SIGTINT) */
2582 while (select_alarmed == 0 && *local_timeout != 0
2583 && process_tick == update_tick)
2584 {
2585 /* If we are interested in terminal input,
2586 wait by reading the terminal.
2587 That makes instant wakeup for terminal input at least. */
2588 if (FD_ISSET (0, &orfds))
2589 {
2590 read_input_waiting ();
2591 if (detect_input_pending ())
2592 select_alarmed = 1;
2593 }
2594 else
2595 pause ();
2596 }
2597 (*local_timeout) -= SELECT_PAUSE;
2598
2599 /* Reset the old alarm if there was one. */
2600 turn_on_atimers (1);
2601
2602 if (*local_timeout == 0) /* Stop on timer being cleared */
2603 break;
2604 }
2605 return ravail;
2606 }
2607 #endif /* not WINDOWSNT */
2608
2609 /* Read keyboard input into the standard buffer,
2610 waiting for at least one character. */
2611
2612 /* Make all keyboard buffers much bigger when using a window system. */
2613 #ifdef HAVE_WINDOW_SYSTEM
2614 #define BUFFER_SIZE_FACTOR 16
2615 #else
2616 #define BUFFER_SIZE_FACTOR 1
2617 #endif
2618
2619 void
2620 read_input_waiting ()
2621 {
2622 struct input_event e;
2623 int nread, i;
2624 extern int quit_char;
2625
2626 if (read_socket_hook)
2627 {
2628 struct input_event buf[256];
2629
2630 read_alarm_should_throw = 0;
2631 if (! setjmp (read_alarm_throw))
2632 nread = (*read_socket_hook) (0, buf, 256, 1);
2633 else
2634 nread = -1;
2635
2636 /* Scan the chars for C-g and store them in kbd_buffer. */
2637 for (i = 0; i < nread; i++)
2638 {
2639 kbd_buffer_store_event (&buf[i]);
2640 /* Don't look at input that follows a C-g too closely.
2641 This reduces lossage due to autorepeat on C-g. */
2642 if (buf[i].kind == ascii_keystroke
2643 && buf[i].code == quit_char)
2644 break;
2645 }
2646 }
2647 else
2648 {
2649 char buf[3];
2650 nread = read (fileno (stdin), buf, 1);
2651
2652 /* Scan the chars for C-g and store them in kbd_buffer. */
2653 e.kind = ascii_keystroke;
2654 e.frame_or_window = selected_frame;
2655 e.modifiers = 0;
2656 for (i = 0; i < nread; i++)
2657 {
2658 /* Convert chars > 0177 to meta events if desired.
2659 We do this under the same conditions that read_avail_input does. */
2660 if (read_socket_hook == 0)
2661 {
2662 /* If the user says she has a meta key, then believe her. */
2663 if (meta_key == 1 && (buf[i] & 0x80))
2664 e.modifiers = meta_modifier;
2665 if (meta_key != 2)
2666 buf[i] &= ~0x80;
2667 }
2668
2669 XSETINT (e.code, buf[i]);
2670 kbd_buffer_store_event (&e);
2671 /* Don't look at input that follows a C-g too closely.
2672 This reduces lossage due to autorepeat on C-g. */
2673 if (buf[i] == quit_char)
2674 break;
2675 }
2676 }
2677 }
2678
2679 #endif /* not HAVE_SELECT */
2680 #endif /* not VMS */
2681 #endif /* not MSDOS */
2682 \f
2683 #ifdef BSD4_1
2684 void
2685 init_sigio (fd)
2686 int fd;
2687 {
2688 if (noninteractive)
2689 return;
2690 lmode = LINTRUP | lmode;
2691 ioctl (fd, TIOCLSET, &lmode);
2692 }
2693
2694 void
2695 reset_sigio ()
2696 {
2697 if (noninteractive)
2698 return;
2699 lmode = ~LINTRUP & lmode;
2700 ioctl (0, TIOCLSET, &lmode);
2701 }
2702
2703 void
2704 request_sigio ()
2705 {
2706 sigrelse (SIGTINT);
2707
2708 interrupts_deferred = 0;
2709 }
2710
2711 void
2712 unrequest_sigio ()
2713 {
2714 sighold (SIGTINT);
2715
2716 interrupts_deferred = 1;
2717 }
2718
2719 /* still inside #ifdef BSD4_1 */
2720 #ifdef subprocesses
2721
2722 int sigheld; /* Mask of held signals */
2723
2724 void
2725 sigholdx (signum)
2726 int signum;
2727 {
2728 sigheld |= sigbit (signum);
2729 sighold (signum);
2730 }
2731
2732 void
2733 sigisheld (signum)
2734 int signum;
2735 {
2736 sigheld |= sigbit (signum);
2737 }
2738
2739 void
2740 sigunhold (signum)
2741 int signum;
2742 {
2743 sigheld &= ~sigbit (signum);
2744 sigrelse (signum);
2745 }
2746
2747 void
2748 sigfree () /* Free all held signals */
2749 {
2750 int i;
2751 for (i = 0; i < NSIG; i++)
2752 if (sigheld & sigbit (i))
2753 sigrelse (i);
2754 sigheld = 0;
2755 }
2756
2757 int
2758 sigbit (i)
2759 {
2760 return 1 << (i - 1);
2761 }
2762 #endif /* subprocesses */
2763 #endif /* BSD4_1 */
2764 \f
2765 /* POSIX signals support - DJB */
2766 /* Anyone with POSIX signals should have ANSI C declarations */
2767
2768 #ifdef POSIX_SIGNALS
2769
2770 sigset_t empty_mask, full_mask;
2771
2772 signal_handler_t
2773 sys_signal (int signal_number, signal_handler_t action)
2774 {
2775 struct sigaction new_action, old_action;
2776 sigemptyset (&new_action.sa_mask);
2777 new_action.sa_handler = action;
2778 #ifdef SA_RESTART
2779 /* Emacs mostly works better with restartable system services. If this
2780 * flag exists, we probably want to turn it on here.
2781 */
2782 new_action.sa_flags = SA_RESTART;
2783 #else
2784 new_action.sa_flags = 0;
2785 #endif
2786 sigaction (signal_number, &new_action, &old_action);
2787 return (old_action.sa_handler);
2788 }
2789
2790 #ifndef __GNUC__
2791 /* If we're compiling with GCC, we don't need this function, since it
2792 can be written as a macro. */
2793 sigset_t
2794 sys_sigmask (int sig)
2795 {
2796 sigset_t mask;
2797 sigemptyset (&mask);
2798 sigaddset (&mask, sig);
2799 return mask;
2800 }
2801 #endif
2802
2803 /* I'd like to have these guys return pointers to the mask storage in here,
2804 but there'd be trouble if the code was saving multiple masks. I'll be
2805 safe and pass the structure. It normally won't be more than 2 bytes
2806 anyhow. - DJB */
2807
2808 sigset_t
2809 sys_sigblock (sigset_t new_mask)
2810 {
2811 sigset_t old_mask;
2812 sigprocmask (SIG_BLOCK, &new_mask, &old_mask);
2813 return (old_mask);
2814 }
2815
2816 sigset_t
2817 sys_sigunblock (sigset_t new_mask)
2818 {
2819 sigset_t old_mask;
2820 sigprocmask (SIG_UNBLOCK, &new_mask, &old_mask);
2821 return (old_mask);
2822 }
2823
2824 sigset_t
2825 sys_sigsetmask (sigset_t new_mask)
2826 {
2827 sigset_t old_mask;
2828 sigprocmask (SIG_SETMASK, &new_mask, &old_mask);
2829 return (old_mask);
2830 }
2831
2832 #endif /* POSIX_SIGNALS */
2833 \f
2834 #if !defined HAVE_STRSIGNAL && !defined SYS_SIGLIST_DECLARED
2835 static char *my_sys_siglist[NSIG];
2836 # ifdef sys_siglist
2837 # undef sys_siglist
2838 # endif
2839 # define sys_siglist my_sys_siglist
2840 #endif
2841
2842 void
2843 init_signals ()
2844 {
2845 #ifdef POSIX_SIGNALS
2846 sigemptyset (&empty_mask);
2847 sigfillset (&full_mask);
2848 #endif
2849
2850 #if !defined HAVE_STRSIGNAL && !defined SYS_SIGLIST_DECLARED
2851 if (! initialized)
2852 {
2853 # ifdef SIGABRT
2854 sys_siglist[SIGABRT] = "Aborted";
2855 # endif
2856 # ifdef SIGAIO
2857 sys_siglist[SIGAIO] = "LAN I/O interrupt";
2858 # endif
2859 # ifdef SIGALRM
2860 sys_siglist[SIGALRM] = "Alarm clock";
2861 # endif
2862 # ifdef SIGBUS
2863 sys_siglist[SIGBUS] = "Bus error";
2864 # endif
2865 # ifdef SIGCLD
2866 sys_siglist[SIGCLD] = "Child status changed";
2867 # endif
2868 # ifdef SIGCHLD
2869 sys_siglist[SIGCHLD] = "Child status changed";
2870 # endif
2871 # ifdef SIGCONT
2872 sys_siglist[SIGCONT] = "Continued";
2873 # endif
2874 # ifdef SIGDANGER
2875 sys_siglist[SIGDANGER] = "Swap space dangerously low";
2876 # endif
2877 # ifdef SIGDGNOTIFY
2878 sys_siglist[SIGDGNOTIFY] = "Notification message in queue";
2879 # endif
2880 # ifdef SIGEMT
2881 sys_siglist[SIGEMT] = "Emulation trap";
2882 # endif
2883 # ifdef SIGFPE
2884 sys_siglist[SIGFPE] = "Arithmetic exception";
2885 # endif
2886 # ifdef SIGFREEZE
2887 sys_siglist[SIGFREEZE] = "SIGFREEZE";
2888 # endif
2889 # ifdef SIGGRANT
2890 sys_siglist[SIGGRANT] = "Monitor mode granted";
2891 # endif
2892 # ifdef SIGHUP
2893 sys_siglist[SIGHUP] = "Hangup";
2894 # endif
2895 # ifdef SIGILL
2896 sys_siglist[SIGILL] = "Illegal instruction";
2897 # endif
2898 # ifdef SIGINT
2899 sys_siglist[SIGINT] = "Interrupt";
2900 # endif
2901 # ifdef SIGIO
2902 sys_siglist[SIGIO] = "I/O possible";
2903 # endif
2904 # ifdef SIGIOINT
2905 sys_siglist[SIGIOINT] = "I/O intervention required";
2906 # endif
2907 # ifdef SIGIOT
2908 sys_siglist[SIGIOT] = "IOT trap";
2909 # endif
2910 # ifdef SIGKILL
2911 sys_siglist[SIGKILL] = "Killed";
2912 # endif
2913 # ifdef SIGLOST
2914 sys_siglist[SIGLOST] = "Resource lost";
2915 # endif
2916 # ifdef SIGLWP
2917 sys_siglist[SIGLWP] = "SIGLWP";
2918 # endif
2919 # ifdef SIGMSG
2920 sys_siglist[SIGMSG] = "Monitor mode data available";
2921 # endif
2922 # ifdef SIGPHONE
2923 sys_siglist[SIGWIND] = "SIGPHONE";
2924 # endif
2925 # ifdef SIGPIPE
2926 sys_siglist[SIGPIPE] = "Broken pipe";
2927 # endif
2928 # ifdef SIGPOLL
2929 sys_siglist[SIGPOLL] = "Pollable event occurred";
2930 # endif
2931 # ifdef SIGPROF
2932 sys_siglist[SIGPROF] = "Profiling timer expired";
2933 # endif
2934 # ifdef SIGPTY
2935 sys_siglist[SIGPTY] = "PTY I/O interrupt";
2936 # endif
2937 # ifdef SIGPWR
2938 sys_siglist[SIGPWR] = "Power-fail restart";
2939 # endif
2940 # ifdef SIGQUIT
2941 sys_siglist[SIGQUIT] = "Quit";
2942 # endif
2943 # ifdef SIGRETRACT
2944 sys_siglist[SIGRETRACT] = "Need to relinguish monitor mode";
2945 # endif
2946 # ifdef SIGSAK
2947 sys_siglist[SIGSAK] = "Secure attention";
2948 # endif
2949 # ifdef SIGSEGV
2950 sys_siglist[SIGSEGV] = "Segmentation violation";
2951 # endif
2952 # ifdef SIGSOUND
2953 sys_siglist[SIGSOUND] = "Sound completed";
2954 # endif
2955 # ifdef SIGSTOP
2956 sys_siglist[SIGSTOP] = "Stopped (signal)";
2957 # endif
2958 # ifdef SIGSTP
2959 sys_siglist[SIGSTP] = "Stopped (user)";
2960 # endif
2961 # ifdef SIGSYS
2962 sys_siglist[SIGSYS] = "Bad argument to system call";
2963 # endif
2964 # ifdef SIGTERM
2965 sys_siglist[SIGTERM] = "Terminated";
2966 # endif
2967 # ifdef SIGTHAW
2968 sys_siglist[SIGTHAW] = "SIGTHAW";
2969 # endif
2970 # ifdef SIGTRAP
2971 sys_siglist[SIGTRAP] = "Trace/breakpoint trap";
2972 # endif
2973 # ifdef SIGTSTP
2974 sys_siglist[SIGTSTP] = "Stopped (user)";
2975 # endif
2976 # ifdef SIGTTIN
2977 sys_siglist[SIGTTIN] = "Stopped (tty input)";
2978 # endif
2979 # ifdef SIGTTOU
2980 sys_siglist[SIGTTOU] = "Stopped (tty output)";
2981 # endif
2982 # ifdef SIGURG
2983 sys_siglist[SIGURG] = "Urgent I/O condition";
2984 # endif
2985 # ifdef SIGUSR1
2986 sys_siglist[SIGUSR1] = "User defined signal 1";
2987 # endif
2988 # ifdef SIGUSR2
2989 sys_siglist[SIGUSR2] = "User defined signal 2";
2990 # endif
2991 # ifdef SIGVTALRM
2992 sys_siglist[SIGVTALRM] = "Virtual timer expired";
2993 # endif
2994 # ifdef SIGWAITING
2995 sys_siglist[SIGWAITING] = "Process's LWPs are blocked";
2996 # endif
2997 # ifdef SIGWINCH
2998 sys_siglist[SIGWINCH] = "Window size changed";
2999 # endif
3000 # ifdef SIGWIND
3001 sys_siglist[SIGWIND] = "SIGWIND";
3002 # endif
3003 # ifdef SIGXCPU
3004 sys_siglist[SIGXCPU] = "CPU time limit exceeded";
3005 # endif
3006 # ifdef SIGXFSZ
3007 sys_siglist[SIGXFSZ] = "File size limit exceeded";
3008 # endif
3009 }
3010 #endif /* !defined HAVE_STRSIGNAL && !defined SYS_SIGLIST_DECLARED */
3011 }
3012 \f
3013 #ifndef HAVE_RANDOM
3014 #ifdef random
3015 #define HAVE_RANDOM
3016 #endif
3017 #endif
3018
3019 /* Figure out how many bits the system's random number generator uses.
3020 `random' and `lrand48' are assumed to return 31 usable bits.
3021 BSD `rand' returns a 31 bit value but the low order bits are unusable;
3022 so we'll shift it and treat it like the 15-bit USG `rand'. */
3023
3024 #ifndef RAND_BITS
3025 # ifdef HAVE_RANDOM
3026 # define RAND_BITS 31
3027 # else /* !HAVE_RANDOM */
3028 # ifdef HAVE_LRAND48
3029 # define RAND_BITS 31
3030 # define random lrand48
3031 # else /* !HAVE_LRAND48 */
3032 # define RAND_BITS 15
3033 # if RAND_MAX == 32767
3034 # define random rand
3035 # else /* RAND_MAX != 32767 */
3036 # if RAND_MAX == 2147483647
3037 # define random() (rand () >> 16)
3038 # else /* RAND_MAX != 2147483647 */
3039 # ifdef USG
3040 # define random rand
3041 # else
3042 # define random() (rand () >> 16)
3043 # endif /* !USG */
3044 # endif /* RAND_MAX != 2147483647 */
3045 # endif /* RAND_MAX != 32767 */
3046 # endif /* !HAVE_LRAND48 */
3047 # endif /* !HAVE_RANDOM */
3048 #endif /* !RAND_BITS */
3049
3050 void
3051 seed_random (arg)
3052 long arg;
3053 {
3054 #ifdef HAVE_RANDOM
3055 srandom ((unsigned int)arg);
3056 #else
3057 # ifdef HAVE_LRAND48
3058 srand48 (arg);
3059 # else
3060 srand ((unsigned int)arg);
3061 # endif
3062 #endif
3063 }
3064
3065 /*
3066 * Build a full Emacs-sized word out of whatever we've got.
3067 * This suffices even for a 64-bit architecture with a 15-bit rand.
3068 */
3069 long
3070 get_random ()
3071 {
3072 long val = random ();
3073 #if VALBITS > RAND_BITS
3074 val = (val << RAND_BITS) ^ random ();
3075 #if VALBITS > 2*RAND_BITS
3076 val = (val << RAND_BITS) ^ random ();
3077 #if VALBITS > 3*RAND_BITS
3078 val = (val << RAND_BITS) ^ random ();
3079 #if VALBITS > 4*RAND_BITS
3080 val = (val << RAND_BITS) ^ random ();
3081 #endif /* need at least 5 */
3082 #endif /* need at least 4 */
3083 #endif /* need at least 3 */
3084 #endif /* need at least 2 */
3085 return val & ((1L << VALBITS) - 1);
3086 }
3087 \f
3088 #ifdef WRONG_NAME_INSQUE
3089
3090 insque (q,p)
3091 caddr_t q,p;
3092 {
3093 _insque (q,p);
3094 }
3095
3096 #endif
3097 \f
3098 #ifdef VMS
3099
3100 #ifdef getenv
3101 /* If any place else asks for the TERM variable,
3102 allow it to be overridden with the EMACS_TERM variable
3103 before attempting to translate the logical name TERM. As a last
3104 resort, ask for VAX C's special idea of the TERM variable. */
3105 #undef getenv
3106 char *
3107 sys_getenv (name)
3108 char *name;
3109 {
3110 register char *val;
3111 static char buf[256];
3112 static struct dsc$descriptor_s equiv
3113 = {sizeof (buf), DSC$K_DTYPE_T, DSC$K_CLASS_S, buf};
3114 static struct dsc$descriptor_s d_name
3115 = {0, DSC$K_DTYPE_T, DSC$K_CLASS_S, 0};
3116 short eqlen;
3117
3118 if (!strcmp (name, "TERM"))
3119 {
3120 val = (char *) getenv ("EMACS_TERM");
3121 if (val)
3122 return val;
3123 }
3124
3125 d_name.dsc$w_length = strlen (name);
3126 d_name.dsc$a_pointer = name;
3127 if (LIB$SYS_TRNLOG (&d_name, &eqlen, &equiv) == 1)
3128 {
3129 char *str = (char *) xmalloc (eqlen + 1);
3130 bcopy (buf, str, eqlen);
3131 str[eqlen] = '\0';
3132 /* This is a storage leak, but a pain to fix. With luck,
3133 no one will ever notice. */
3134 return str;
3135 }
3136 return (char *) getenv (name);
3137 }
3138 #endif /* getenv */
3139
3140 #ifdef abort
3141 /* Since VMS doesn't believe in core dumps, the only way to debug this beast is
3142 to force a call on the debugger from within the image. */
3143 #undef abort
3144 sys_abort ()
3145 {
3146 reset_sys_modes ();
3147 LIB$SIGNAL (SS$_DEBUG);
3148 }
3149 #endif /* abort */
3150 #endif /* VMS */
3151 \f
3152 #ifdef VMS
3153 #ifdef LINK_CRTL_SHARE
3154 #ifdef SHARABLE_LIB_BUG
3155 /* Variables declared noshare and initialized in sharable libraries
3156 cannot be shared. The VMS linker incorrectly forces you to use a private
3157 version which is uninitialized... If not for this "feature", we
3158 could use the C library definition of sys_nerr and sys_errlist. */
3159 int sys_nerr = 35;
3160 char *sys_errlist[] =
3161 {
3162 "error 0",
3163 "not owner",
3164 "no such file or directory",
3165 "no such process",
3166 "interrupted system call",
3167 "i/o error",
3168 "no such device or address",
3169 "argument list too long",
3170 "exec format error",
3171 "bad file number",
3172 "no child process",
3173 "no more processes",
3174 "not enough memory",
3175 "permission denied",
3176 "bad address",
3177 "block device required",
3178 "mount devices busy",
3179 "file exists",
3180 "cross-device link",
3181 "no such device",
3182 "not a directory",
3183 "is a directory",
3184 "invalid argument",
3185 "file table overflow",
3186 "too many open files",
3187 "not a typewriter",
3188 "text file busy",
3189 "file too big",
3190 "no space left on device",
3191 "illegal seek",
3192 "read-only file system",
3193 "too many links",
3194 "broken pipe",
3195 "math argument",
3196 "result too large",
3197 "I/O stream empty",
3198 "vax/vms specific error code nontranslatable error"
3199 };
3200 #endif /* SHARABLE_LIB_BUG */
3201 #endif /* LINK_CRTL_SHARE */
3202 #endif /* VMS */
3203
3204 #ifndef HAVE_STRERROR
3205 #ifndef WINDOWSNT
3206 char *
3207 strerror (errnum)
3208 int errnum;
3209 {
3210 extern char *sys_errlist[];
3211 extern int sys_nerr;
3212
3213 if (errnum >= 0 && errnum < sys_nerr)
3214 return sys_errlist[errnum];
3215 return (char *) "Unknown error";
3216 }
3217 #endif /* not WINDOWSNT */
3218 #endif /* ! HAVE_STRERROR */
3219 \f
3220 int
3221 emacs_open (path, oflag, mode)
3222 char *path;
3223 int oflag, mode;
3224 {
3225 register int rtnval;
3226
3227 #ifdef BSD4_1
3228 if (oflag & O_CREAT)
3229 return creat (path, mode);
3230 #endif
3231
3232 while ((rtnval = open (path, oflag, mode)) == -1
3233 && (errno == EINTR));
3234 return (rtnval);
3235 }
3236
3237 int
3238 emacs_close (fd)
3239 int fd;
3240 {
3241 int did_retry = 0;
3242 register int rtnval;
3243
3244 while ((rtnval = close (fd)) == -1
3245 && (errno == EINTR))
3246 did_retry = 1;
3247
3248 /* If close is interrupted SunOS 4.1 may or may not have closed the
3249 file descriptor. If it did the second close will fail with
3250 errno = EBADF. That means we have succeeded. */
3251 if (rtnval == -1 && did_retry && errno == EBADF)
3252 return 0;
3253
3254 return rtnval;
3255 }
3256
3257 int
3258 emacs_read (fildes, buf, nbyte)
3259 int fildes;
3260 char *buf;
3261 unsigned int nbyte;
3262 {
3263 register int rtnval;
3264
3265 while ((rtnval = read (fildes, buf, nbyte)) == -1
3266 && (errno == EINTR));
3267 return (rtnval);
3268 }
3269
3270 int
3271 emacs_write (fildes, buf, nbyte)
3272 int fildes;
3273 char *buf;
3274 unsigned int nbyte;
3275 {
3276 register int rtnval, bytes_written;
3277
3278 bytes_written = 0;
3279
3280 while (nbyte > 0)
3281 {
3282 rtnval = write (fildes, buf, nbyte);
3283
3284 if (rtnval == -1)
3285 {
3286 if (errno == EINTR)
3287 continue;
3288 else
3289 return (bytes_written ? bytes_written : -1);
3290 }
3291
3292 buf += rtnval;
3293 nbyte -= rtnval;
3294 bytes_written += rtnval;
3295 }
3296 return (bytes_written);
3297 }
3298 \f
3299 #ifdef USG
3300 /*
3301 * All of the following are for USG.
3302 *
3303 * On USG systems the system calls are INTERRUPTIBLE by signals
3304 * that the user program has elected to catch. Thus the system call
3305 * must be retried in these cases. To handle this without massive
3306 * changes in the source code, we remap the standard system call names
3307 * to names for our own functions in sysdep.c that do the system call
3308 * with retries. Actually, for portability reasons, it is good
3309 * programming practice, as this example shows, to limit all actual
3310 * system calls to a single occurrence in the source. Sure, this
3311 * adds an extra level of function call overhead but it is almost
3312 * always negligible. Fred Fish, Unisoft Systems Inc.
3313 */
3314
3315 /*
3316 * Warning, this function may not duplicate 4.2 action properly
3317 * under error conditions.
3318 */
3319
3320 #ifndef MAXPATHLEN
3321 /* In 4.1, param.h fails to define this. */
3322 #define MAXPATHLEN 1024
3323 #endif
3324
3325 #ifndef HAVE_GETWD
3326
3327 char *
3328 getwd (pathname)
3329 char *pathname;
3330 {
3331 char *npath, *spath;
3332 extern char *getcwd ();
3333
3334 BLOCK_INPUT; /* getcwd uses malloc */
3335 spath = npath = getcwd ((char *) 0, MAXPATHLEN);
3336 if (spath == 0)
3337 return spath;
3338 /* On Altos 3068, getcwd can return @hostname/dir, so discard
3339 up to first slash. Should be harmless on other systems. */
3340 while (*npath && *npath != '/')
3341 npath++;
3342 strcpy (pathname, npath);
3343 free (spath); /* getcwd uses malloc */
3344 UNBLOCK_INPUT;
3345 return pathname;
3346 }
3347
3348 #endif /* HAVE_GETWD */
3349
3350 /*
3351 * Emulate rename using unlink/link. Note that this is
3352 * only partially correct. Also, doesn't enforce restriction
3353 * that files be of same type (regular->regular, dir->dir, etc).
3354 */
3355
3356 #ifndef HAVE_RENAME
3357
3358 rename (from, to)
3359 const char *from;
3360 const char *to;
3361 {
3362 if (access (from, 0) == 0)
3363 {
3364 unlink (to);
3365 if (link (from, to) == 0)
3366 if (unlink (from) == 0)
3367 return (0);
3368 }
3369 return (-1);
3370 }
3371
3372 #endif
3373
3374
3375 #ifdef HPUX
3376 #ifndef HAVE_PERROR
3377
3378 /* HPUX curses library references perror, but as far as we know
3379 it won't be called. Anyway this definition will do for now. */
3380
3381 perror ()
3382 {
3383 }
3384
3385 #endif /* not HAVE_PERROR */
3386 #endif /* HPUX */
3387
3388 #ifndef HAVE_DUP2
3389
3390 /*
3391 * Emulate BSD dup2. First close newd if it already exists.
3392 * Then, attempt to dup oldd. If not successful, call dup2 recursively
3393 * until we are, then close the unsuccessful ones.
3394 */
3395
3396 dup2 (oldd, newd)
3397 int oldd;
3398 int newd;
3399 {
3400 register int fd, ret;
3401
3402 emacs_close (newd);
3403
3404 #ifdef F_DUPFD
3405 return fcntl (oldd, F_DUPFD, newd);
3406 #else
3407 fd = dup (old);
3408 if (fd == -1)
3409 return -1;
3410 if (fd == new)
3411 return new;
3412 ret = dup2 (old,new);
3413 emacs_close (fd);
3414 return ret;
3415 #endif
3416 }
3417
3418 #endif /* not HAVE_DUP2 */
3419
3420 /*
3421 * Gettimeofday. Simulate as much as possible. Only accurate
3422 * to nearest second. Emacs doesn't use tzp so ignore it for now.
3423 * Only needed when subprocesses are defined.
3424 */
3425
3426 #ifdef subprocesses
3427 #ifndef VMS
3428 #ifndef HAVE_GETTIMEOFDAY
3429 #ifdef HAVE_TIMEVAL
3430
3431 /* ARGSUSED */
3432 int
3433 gettimeofday (tp, tzp)
3434 struct timeval *tp;
3435 struct timezone *tzp;
3436 {
3437 extern long time ();
3438
3439 tp->tv_sec = time ((long *)0);
3440 tp->tv_usec = 0;
3441 if (tzp != 0)
3442 tzp->tz_minuteswest = -1;
3443 return 0;
3444 }
3445
3446 #endif
3447 #endif
3448 #endif
3449 #endif /* subprocess && !HAVE_GETTIMEOFDAY && HAVE_TIMEVAL && !VMS */
3450
3451 /*
3452 * This function will go away as soon as all the stubs fixed. (fnf)
3453 */
3454
3455 void
3456 croak (badfunc)
3457 char *badfunc;
3458 {
3459 printf ("%s not yet implemented\r\n", badfunc);
3460 reset_sys_modes ();
3461 exit (1);
3462 }
3463
3464 #endif /* USG */
3465 \f
3466 /* Directory routines for systems that don't have them. */
3467
3468 #ifdef SYSV_SYSTEM_DIR
3469
3470 #include <dirent.h>
3471
3472 #if defined (BROKEN_CLOSEDIR) || !defined (HAVE_CLOSEDIR)
3473
3474 int
3475 closedir (dirp)
3476 register DIR *dirp; /* stream from opendir */
3477 {
3478 int rtnval;
3479
3480 rtnval = emacs_close (dirp->dd_fd);
3481
3482 /* Some systems (like Solaris) allocate the buffer and the DIR all
3483 in one block. Why in the world are we freeing this ourselves
3484 anyway? */
3485 #if ! (defined (sun) && defined (USG5_4))
3486 xfree ((char *) dirp->dd_buf); /* directory block defined in <dirent.h> */
3487 #endif
3488 xfree ((char *) dirp);
3489
3490 return rtnval;
3491 }
3492 #endif /* BROKEN_CLOSEDIR or not HAVE_CLOSEDIR */
3493 #endif /* SYSV_SYSTEM_DIR */
3494
3495 #ifdef NONSYSTEM_DIR_LIBRARY
3496
3497 DIR *
3498 opendir (filename)
3499 char *filename; /* name of directory */
3500 {
3501 register DIR *dirp; /* -> malloc'ed storage */
3502 register int fd; /* file descriptor for read */
3503 struct stat sbuf; /* result of fstat */
3504
3505 fd = emacs_open (filename, O_RDONLY, 0);
3506 if (fd < 0)
3507 return 0;
3508
3509 BLOCK_INPUT;
3510 if (fstat (fd, &sbuf) < 0
3511 || (sbuf.st_mode & S_IFMT) != S_IFDIR
3512 || (dirp = (DIR *) xmalloc (sizeof (DIR))) == 0)
3513 {
3514 emacs_close (fd);
3515 UNBLOCK_INPUT;
3516 return 0; /* bad luck today */
3517 }
3518 UNBLOCK_INPUT;
3519
3520 dirp->dd_fd = fd;
3521 dirp->dd_loc = dirp->dd_size = 0; /* refill needed */
3522
3523 return dirp;
3524 }
3525
3526 void
3527 closedir (dirp)
3528 register DIR *dirp; /* stream from opendir */
3529 {
3530 emacs_close (dirp->dd_fd);
3531 xfree ((char *) dirp);
3532 }
3533
3534
3535 #ifndef VMS
3536 #define DIRSIZ 14
3537 struct olddir
3538 {
3539 ino_t od_ino; /* inode */
3540 char od_name[DIRSIZ]; /* filename */
3541 };
3542 #endif /* not VMS */
3543
3544 struct direct dir_static; /* simulated directory contents */
3545
3546 /* ARGUSED */
3547 struct direct *
3548 readdir (dirp)
3549 register DIR *dirp; /* stream from opendir */
3550 {
3551 #ifndef VMS
3552 register struct olddir *dp; /* -> directory data */
3553 #else /* VMS */
3554 register struct dir$_name *dp; /* -> directory data */
3555 register struct dir$_version *dv; /* -> version data */
3556 #endif /* VMS */
3557
3558 for (; ;)
3559 {
3560 if (dirp->dd_loc >= dirp->dd_size)
3561 dirp->dd_loc = dirp->dd_size = 0;
3562
3563 if (dirp->dd_size == 0 /* refill buffer */
3564 && (dirp->dd_size = emacs_read (dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ)) <= 0)
3565 return 0;
3566
3567 #ifndef VMS
3568 dp = (struct olddir *) &dirp->dd_buf[dirp->dd_loc];
3569 dirp->dd_loc += sizeof (struct olddir);
3570
3571 if (dp->od_ino != 0) /* not deleted entry */
3572 {
3573 dir_static.d_ino = dp->od_ino;
3574 strncpy (dir_static.d_name, dp->od_name, DIRSIZ);
3575 dir_static.d_name[DIRSIZ] = '\0';
3576 dir_static.d_namlen = strlen (dir_static.d_name);
3577 dir_static.d_reclen = sizeof (struct direct)
3578 - MAXNAMLEN + 3
3579 + dir_static.d_namlen - dir_static.d_namlen % 4;
3580 return &dir_static; /* -> simulated structure */
3581 }
3582 #else /* VMS */
3583 dp = (struct dir$_name *) dirp->dd_buf;
3584 if (dirp->dd_loc == 0)
3585 dirp->dd_loc = (dp->dir$b_namecount&1) ? dp->dir$b_namecount + 1
3586 : dp->dir$b_namecount;
3587 dv = (struct dir$_version *)&dp->dir$t_name[dirp->dd_loc];
3588 dir_static.d_ino = dv->dir$w_fid_num;
3589 dir_static.d_namlen = dp->dir$b_namecount;
3590 dir_static.d_reclen = sizeof (struct direct)
3591 - MAXNAMLEN + 3
3592 + dir_static.d_namlen - dir_static.d_namlen % 4;
3593 strncpy (dir_static.d_name, dp->dir$t_name, dp->dir$b_namecount);
3594 dir_static.d_name[dir_static.d_namlen] = '\0';
3595 dirp->dd_loc = dirp->dd_size; /* only one record at a time */
3596 return &dir_static;
3597 #endif /* VMS */
3598 }
3599 }
3600
3601 #ifdef VMS
3602 /* readdirver is just like readdir except it returns all versions of a file
3603 as separate entries. */
3604
3605 /* ARGUSED */
3606 struct direct *
3607 readdirver (dirp)
3608 register DIR *dirp; /* stream from opendir */
3609 {
3610 register struct dir$_name *dp; /* -> directory data */
3611 register struct dir$_version *dv; /* -> version data */
3612
3613 if (dirp->dd_loc >= dirp->dd_size - sizeof (struct dir$_name))
3614 dirp->dd_loc = dirp->dd_size = 0;
3615
3616 if (dirp->dd_size == 0 /* refill buffer */
3617 && (dirp->dd_size = sys_read (dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ)) <= 0)
3618 return 0;
3619
3620 dp = (struct dir$_name *) dirp->dd_buf;
3621 if (dirp->dd_loc == 0)
3622 dirp->dd_loc = (dp->dir$b_namecount & 1) ? dp->dir$b_namecount + 1
3623 : dp->dir$b_namecount;
3624 dv = (struct dir$_version *) &dp->dir$t_name[dirp->dd_loc];
3625 strncpy (dir_static.d_name, dp->dir$t_name, dp->dir$b_namecount);
3626 sprintf (&dir_static.d_name[dp->dir$b_namecount], ";%d", dv->dir$w_version);
3627 dir_static.d_namlen = strlen (dir_static.d_name);
3628 dir_static.d_ino = dv->dir$w_fid_num;
3629 dir_static.d_reclen = sizeof (struct direct) - MAXNAMLEN + 3
3630 + dir_static.d_namlen - dir_static.d_namlen % 4;
3631 dirp->dd_loc = ((char *) (++dv) - dp->dir$t_name);
3632 return &dir_static;
3633 }
3634
3635 #endif /* VMS */
3636
3637 #endif /* NONSYSTEM_DIR_LIBRARY */
3638
3639 \f
3640 int
3641 set_file_times (filename, atime, mtime)
3642 char *filename;
3643 EMACS_TIME atime, mtime;
3644 {
3645 #ifdef HAVE_UTIMES
3646 struct timeval tv[2];
3647 tv[0] = atime;
3648 tv[1] = mtime;
3649 return utimes (filename, tv);
3650 #else /* not HAVE_UTIMES */
3651 struct utimbuf utb;
3652 utb.actime = EMACS_SECS (atime);
3653 utb.modtime = EMACS_SECS (mtime);
3654 return utime (filename, &utb);
3655 #endif /* not HAVE_UTIMES */
3656 }
3657 \f
3658 /* mkdir and rmdir functions, for systems which don't have them. */
3659
3660 #ifndef HAVE_MKDIR
3661 /*
3662 * Written by Robert Rother, Mariah Corporation, August 1985.
3663 *
3664 * If you want it, it's yours. All I ask in return is that if you
3665 * figure out how to do this in a Bourne Shell script you send me
3666 * a copy.
3667 * sdcsvax!rmr or rmr@uscd
3668 *
3669 * Severely hacked over by John Gilmore to make a 4.2BSD compatible
3670 * subroutine. 11Mar86; hoptoad!gnu
3671 *
3672 * Modified by rmtodd@uokmax 6-28-87 -- when making an already existing dir,
3673 * subroutine didn't return EEXIST. It does now.
3674 */
3675
3676 /*
3677 * Make a directory.
3678 */
3679 #ifdef MKDIR_PROTOTYPE
3680 MKDIR_PROTOTYPE
3681 #else
3682 int
3683 mkdir (dpath, dmode)
3684 char *dpath;
3685 int dmode;
3686 #endif
3687 {
3688 int cpid, status, fd;
3689 struct stat statbuf;
3690
3691 if (stat (dpath, &statbuf) == 0)
3692 {
3693 errno = EEXIST; /* Stat worked, so it already exists */
3694 return -1;
3695 }
3696
3697 /* If stat fails for a reason other than non-existence, return error */
3698 if (errno != ENOENT)
3699 return -1;
3700
3701 synch_process_alive = 1;
3702 switch (cpid = fork ())
3703 {
3704
3705 case -1: /* Error in fork */
3706 return (-1); /* Errno is set already */
3707
3708 case 0: /* Child process */
3709 /*
3710 * Cheap hack to set mode of new directory. Since this
3711 * child process is going away anyway, we zap its umask.
3712 * FIXME, this won't suffice to set SUID, SGID, etc. on this
3713 * directory. Does anybody care?
3714 */
3715 status = umask (0); /* Get current umask */
3716 status = umask (status | (0777 & ~dmode)); /* Set for mkdir */
3717 fd = emacs_open ("/dev/null", O_RDWR, 0);
3718 if (fd >= 0)
3719 {
3720 dup2 (fd, 0);
3721 dup2 (fd, 1);
3722 dup2 (fd, 2);
3723 }
3724 execl ("/bin/mkdir", "mkdir", dpath, (char *) 0);
3725 _exit (-1); /* Can't exec /bin/mkdir */
3726
3727 default: /* Parent process */
3728 wait_for_termination (cpid);
3729 }
3730
3731 if (synch_process_death != 0 || synch_process_retcode != 0)
3732 {
3733 errno = EIO; /* We don't know why, but */
3734 return -1; /* /bin/mkdir failed */
3735 }
3736
3737 return 0;
3738 }
3739 #endif /* not HAVE_MKDIR */
3740
3741 #ifndef HAVE_RMDIR
3742 int
3743 rmdir (dpath)
3744 char *dpath;
3745 {
3746 int cpid, status, fd;
3747 struct stat statbuf;
3748
3749 if (stat (dpath, &statbuf) != 0)
3750 {
3751 /* Stat just set errno. We don't have to */
3752 return -1;
3753 }
3754
3755 synch_process_alive = 1;
3756 switch (cpid = fork ())
3757 {
3758
3759 case -1: /* Error in fork */
3760 return (-1); /* Errno is set already */
3761
3762 case 0: /* Child process */
3763 fd = emacs_open ("/dev/null", O_RDWR, 0);
3764 if (fd >= 0)
3765 {
3766 dup2 (fd, 0);
3767 dup2 (fd, 1);
3768 dup2 (fd, 2);
3769 }
3770 execl ("/bin/rmdir", "rmdir", dpath, (char *) 0);
3771 _exit (-1); /* Can't exec /bin/rmdir */
3772
3773 default: /* Parent process */
3774 wait_for_termination (cpid);
3775 }
3776
3777 if (synch_process_death != 0 || synch_process_retcode != 0)
3778 {
3779 errno = EIO; /* We don't know why, but */
3780 return -1; /* /bin/rmdir failed */
3781 }
3782
3783 return 0;
3784 }
3785 #endif /* !HAVE_RMDIR */
3786
3787
3788 \f
3789 /* Functions for VMS */
3790 #ifdef VMS
3791 #include "vms-pwd.h"
3792 #include <acldef.h>
3793 #include <chpdef.h>
3794 #include <jpidef.h>
3795
3796 /* Return as a string the VMS error string pertaining to STATUS.
3797 Reuses the same static buffer each time it is called. */
3798
3799 char *
3800 vmserrstr (status)
3801 int status; /* VMS status code */
3802 {
3803 int bufadr[2];
3804 short len;
3805 static char buf[257];
3806
3807 bufadr[0] = sizeof buf - 1;
3808 bufadr[1] = (int) buf;
3809 if (! (SYS$GETMSG (status, &len, bufadr, 0x1, 0) & 1))
3810 return "untranslatable VMS error status";
3811 buf[len] = '\0';
3812 return buf;
3813 }
3814
3815 #ifdef access
3816 #undef access
3817
3818 /* The following is necessary because 'access' emulation by VMS C (2.0) does
3819 * not work correctly. (It also doesn't work well in version 2.3.)
3820 */
3821
3822 #ifdef VMS4_4
3823
3824 #define DESCRIPTOR(name,string) struct dsc$descriptor_s name = \
3825 { strlen (string), DSC$K_DTYPE_T, DSC$K_CLASS_S, string }
3826
3827 typedef union {
3828 struct {
3829 unsigned short s_buflen;
3830 unsigned short s_code;
3831 char *s_bufadr;
3832 unsigned short *s_retlenadr;
3833 } s;
3834 int end;
3835 } item;
3836 #define buflen s.s_buflen
3837 #define code s.s_code
3838 #define bufadr s.s_bufadr
3839 #define retlenadr s.s_retlenadr
3840
3841 #define R_OK 4 /* test for read permission */
3842 #define W_OK 2 /* test for write permission */
3843 #define X_OK 1 /* test for execute (search) permission */
3844 #define F_OK 0 /* test for presence of file */
3845
3846 int
3847 sys_access (path, mode)
3848 char *path;
3849 int mode;
3850 {
3851 static char *user = NULL;
3852 char dir_fn[512];
3853
3854 /* translate possible directory spec into .DIR file name, so brain-dead
3855 * access can treat the directory like a file. */
3856 if (directory_file_name (path, dir_fn))
3857 path = dir_fn;
3858
3859 if (mode == F_OK)
3860 return access (path, mode);
3861 if (user == NULL && (user = (char *) getenv ("USER")) == NULL)
3862 return -1;
3863 {
3864 int stat;
3865 int flags;
3866 int acces;
3867 unsigned short int dummy;
3868 item itemlst[3];
3869 static int constant = ACL$C_FILE;
3870 DESCRIPTOR (path_desc, path);
3871 DESCRIPTOR (user_desc, user);
3872
3873 flags = 0;
3874 acces = 0;
3875 if ((mode & X_OK) && ((stat = access (path, mode)) < 0 || mode == X_OK))
3876 return stat;
3877 if (mode & R_OK)
3878 acces |= CHP$M_READ;
3879 if (mode & W_OK)
3880 acces |= CHP$M_WRITE;
3881 itemlst[0].buflen = sizeof (int);
3882 itemlst[0].code = CHP$_FLAGS;
3883 itemlst[0].bufadr = (char *) &flags;
3884 itemlst[0].retlenadr = &dummy;
3885 itemlst[1].buflen = sizeof (int);
3886 itemlst[1].code = CHP$_ACCESS;
3887 itemlst[1].bufadr = (char *) &acces;
3888 itemlst[1].retlenadr = &dummy;
3889 itemlst[2].end = CHP$_END;
3890 stat = SYS$CHECK_ACCESS (&constant, &path_desc, &user_desc, itemlst);
3891 return stat == SS$_NORMAL ? 0 : -1;
3892 }
3893 }
3894
3895 #else /* not VMS4_4 */
3896
3897 #include <prvdef.h>
3898 #define ACE$M_WRITE 2
3899 #define ACE$C_KEYID 1
3900
3901 static unsigned short memid, grpid;
3902 static unsigned int uic;
3903
3904 /* Called from init_sys_modes, so it happens not very often
3905 but at least each time Emacs is loaded. */
3906 void
3907 sys_access_reinit ()
3908 {
3909 uic = 0;
3910 }
3911
3912 int
3913 sys_access (filename, type)
3914 char * filename;
3915 int type;
3916 {
3917 struct FAB fab;
3918 struct XABPRO xab;
3919 int status, size, i, typecode, acl_controlled;
3920 unsigned int *aclptr, *aclend, aclbuf[60];
3921 union prvdef prvmask;
3922
3923 /* Get UIC and GRP values for protection checking. */
3924 if (uic == 0)
3925 {
3926 status = LIB$GETJPI (&JPI$_UIC, 0, 0, &uic, 0, 0);
3927 if (! (status & 1))
3928 return -1;
3929 memid = uic & 0xFFFF;
3930 grpid = uic >> 16;
3931 }
3932
3933 if (type != 2) /* not checking write access */
3934 return access (filename, type);
3935
3936 /* Check write protection. */
3937
3938 #define CHECKPRIV(bit) (prvmask.bit)
3939 #define WRITABLE(field) (! ((xab.xab$w_pro >> field) & XAB$M_NOWRITE))
3940
3941 /* Find privilege bits */
3942 status = SYS$SETPRV (0, 0, 0, prvmask);
3943 if (! (status & 1))
3944 error ("Unable to find privileges: %s", vmserrstr (status));
3945 if (CHECKPRIV (PRV$V_BYPASS))
3946 return 0; /* BYPASS enabled */
3947 fab = cc$rms_fab;
3948 fab.fab$b_fac = FAB$M_GET;
3949 fab.fab$l_fna = filename;
3950 fab.fab$b_fns = strlen (filename);
3951 fab.fab$l_xab = &xab;
3952 xab = cc$rms_xabpro;
3953 xab.xab$l_aclbuf = aclbuf;
3954 xab.xab$w_aclsiz = sizeof (aclbuf);
3955 status = SYS$OPEN (&fab, 0, 0);
3956 if (! (status & 1))
3957 return -1;
3958 SYS$CLOSE (&fab, 0, 0);
3959 /* Check system access */
3960 if (CHECKPRIV (PRV$V_SYSPRV) && WRITABLE (XAB$V_SYS))
3961 return 0;
3962 /* Check ACL entries, if any */
3963 acl_controlled = 0;
3964 if (xab.xab$w_acllen > 0)
3965 {
3966 aclptr = aclbuf;
3967 aclend = &aclbuf[xab.xab$w_acllen / 4];
3968 while (*aclptr && aclptr < aclend)
3969 {
3970 size = (*aclptr & 0xff) / 4;
3971 typecode = (*aclptr >> 8) & 0xff;
3972 if (typecode == ACE$C_KEYID)
3973 for (i = size - 1; i > 1; i--)
3974 if (aclptr[i] == uic)
3975 {
3976 acl_controlled = 1;
3977 if (aclptr[1] & ACE$M_WRITE)
3978 return 0; /* Write access through ACL */
3979 }
3980 aclptr = &aclptr[size];
3981 }
3982 if (acl_controlled) /* ACL specified, prohibits write access */
3983 return -1;
3984 }
3985 /* No ACL entries specified, check normal protection */
3986 if (WRITABLE (XAB$V_WLD)) /* World writable */
3987 return 0;
3988 if (WRITABLE (XAB$V_GRP) &&
3989 (unsigned short) (xab.xab$l_uic >> 16) == grpid)
3990 return 0; /* Group writable */
3991 if (WRITABLE (XAB$V_OWN) &&
3992 (xab.xab$l_uic & 0xFFFF) == memid)
3993 return 0; /* Owner writable */
3994
3995 return -1; /* Not writable */
3996 }
3997 #endif /* not VMS4_4 */
3998 #endif /* access */
3999
4000 static char vtbuf[NAM$C_MAXRSS+1];
4001
4002 /* translate a vms file spec to a unix path */
4003 char *
4004 sys_translate_vms (vfile)
4005 char * vfile;
4006 {
4007 char * p;
4008 char * targ;
4009
4010 if (!vfile)
4011 return 0;
4012
4013 targ = vtbuf;
4014
4015 /* leading device or logical name is a root directory */
4016 if (p = strchr (vfile, ':'))
4017 {
4018 *targ++ = '/';
4019 while (vfile < p)
4020 *targ++ = *vfile++;
4021 vfile++;
4022 *targ++ = '/';
4023 }
4024 p = vfile;
4025 if (*p == '[' || *p == '<')
4026 {
4027 while (*++vfile != *p + 2)
4028 switch (*vfile)
4029 {
4030 case '.':
4031 if (vfile[-1] == *p)
4032 *targ++ = '.';
4033 *targ++ = '/';
4034 break;
4035
4036 case '-':
4037 *targ++ = '.';
4038 *targ++ = '.';
4039 break;
4040
4041 default:
4042 *targ++ = *vfile;
4043 break;
4044 }
4045 vfile++;
4046 *targ++ = '/';
4047 }
4048 while (*vfile)
4049 *targ++ = *vfile++;
4050
4051 return vtbuf;
4052 }
4053
4054 static char utbuf[NAM$C_MAXRSS+1];
4055
4056 /* translate a unix path to a VMS file spec */
4057 char *
4058 sys_translate_unix (ufile)
4059 char * ufile;
4060 {
4061 int slash_seen = 0;
4062 char *p;
4063 char * targ;
4064
4065 if (!ufile)
4066 return 0;
4067
4068 targ = utbuf;
4069
4070 if (*ufile == '/')
4071 {
4072 ufile++;
4073 }
4074
4075 while (*ufile)
4076 {
4077 switch (*ufile)
4078 {
4079 case '/':
4080 if (slash_seen)
4081 if (index (&ufile[1], '/'))
4082 *targ++ = '.';
4083 else
4084 *targ++ = ']';
4085 else
4086 {
4087 *targ++ = ':';
4088 if (index (&ufile[1], '/'))
4089 *targ++ = '[';
4090 slash_seen = 1;
4091 }
4092 break;
4093
4094 case '.':
4095 if (strncmp (ufile, "./", 2) == 0)
4096 {
4097 if (!slash_seen)
4098 {
4099 *targ++ = '[';
4100 slash_seen = 1;
4101 }
4102 ufile++; /* skip the dot */
4103 if (index (&ufile[1], '/'))
4104 *targ++ = '.';
4105 else
4106 *targ++ = ']';
4107 }
4108 else if (strncmp (ufile, "../", 3) == 0)
4109 {
4110 if (!slash_seen)
4111 {
4112 *targ++ = '[';
4113 slash_seen = 1;
4114 }
4115 *targ++ = '-';
4116 ufile += 2; /* skip the dots */
4117 if (index (&ufile[1], '/'))
4118 *targ++ = '.';
4119 else
4120 *targ++ = ']';
4121 }
4122 else
4123 *targ++ = *ufile;
4124 break;
4125
4126 default:
4127 *targ++ = *ufile;
4128 break;
4129 }
4130 ufile++;
4131 }
4132 *targ = '\0';
4133
4134 return utbuf;
4135 }
4136
4137 char *
4138 getwd (pathname)
4139 char *pathname;
4140 {
4141 char *ptr, *val;
4142 extern char *getcwd ();
4143
4144 #define MAXPATHLEN 1024
4145
4146 ptr = xmalloc (MAXPATHLEN);
4147 val = getcwd (ptr, MAXPATHLEN);
4148 if (val == 0)
4149 {
4150 xfree (ptr);
4151 return val;
4152 }
4153 strcpy (pathname, ptr);
4154 xfree (ptr);
4155
4156 return pathname;
4157 }
4158
4159 int
4160 getppid ()
4161 {
4162 long item_code = JPI$_OWNER;
4163 unsigned long parent_id;
4164 int status;
4165
4166 if (((status = LIB$GETJPI (&item_code, 0, 0, &parent_id)) & 1) == 0)
4167 {
4168 errno = EVMSERR;
4169 vaxc$errno = status;
4170 return -1;
4171 }
4172 return parent_id;
4173 }
4174
4175 #undef getuid
4176 unsigned
4177 sys_getuid ()
4178 {
4179 return (getgid () << 16) | getuid ();
4180 }
4181
4182 #undef read
4183 int
4184 sys_read (fildes, buf, nbyte)
4185 int fildes;
4186 char *buf;
4187 unsigned int nbyte;
4188 {
4189 return read (fildes, buf, (nbyte < MAXIOSIZE ? nbyte : MAXIOSIZE));
4190 }
4191
4192 #if 0
4193 int
4194 sys_write (fildes, buf, nbyte)
4195 int fildes;
4196 char *buf;
4197 unsigned int nbyte;
4198 {
4199 register int nwrote, rtnval = 0;
4200
4201 while (nbyte > MAXIOSIZE && (nwrote = write (fildes, buf, MAXIOSIZE)) > 0) {
4202 nbyte -= nwrote;
4203 buf += nwrote;
4204 rtnval += nwrote;
4205 }
4206 if (nwrote < 0)
4207 return rtnval ? rtnval : -1;
4208 if ((nwrote = write (fildes, buf, nbyte)) < 0)
4209 return rtnval ? rtnval : -1;
4210 return (rtnval + nwrote);
4211 }
4212 #endif /* 0 */
4213
4214 /*
4215 * VAX/VMS VAX C RTL really loses. It insists that records
4216 * end with a newline (carriage return) character, and if they
4217 * don't it adds one (nice of it isn't it!)
4218 *
4219 * Thus we do this stupidity below.
4220 */
4221
4222 #undef write
4223 int
4224 sys_write (fildes, buf, nbytes)
4225 int fildes;
4226 char *buf;
4227 unsigned int nbytes;
4228 {
4229 register char *p;
4230 register char *e;
4231 int sum = 0;
4232 struct stat st;
4233
4234 fstat (fildes, &st);
4235 p = buf;
4236 while (nbytes > 0)
4237 {
4238 int len, retval;
4239
4240 /* Handle fixed-length files with carriage control. */
4241 if (st.st_fab_rfm == FAB$C_FIX
4242 && ((st.st_fab_rat & (FAB$M_FTN | FAB$M_CR)) != 0))
4243 {
4244 len = st.st_fab_mrs;
4245 retval = write (fildes, p, min (len, nbytes));
4246 if (retval != len)
4247 return -1;
4248 retval++; /* This skips the implied carriage control */
4249 }
4250 else
4251 {
4252 e = p + min (MAXIOSIZE, nbytes) - 1;
4253 while (*e != '\n' && e > p) e--;
4254 if (p == e) /* Ok.. so here we add a newline... sigh. */
4255 e = p + min (MAXIOSIZE, nbytes) - 1;
4256 len = e + 1 - p;
4257 retval = write (fildes, p, len);
4258 if (retval != len)
4259 return -1;
4260 }
4261 p += retval;
4262 sum += retval;
4263 nbytes -= retval;
4264 }
4265 return sum;
4266 }
4267
4268 /* Create file NEW copying its attributes from file OLD. If
4269 OLD is 0 or does not exist, create based on the value of
4270 vms_stmlf_recfm. */
4271
4272 /* Protection value the file should ultimately have.
4273 Set by create_copy_attrs, and use by rename_sansversions. */
4274 static unsigned short int fab_final_pro;
4275
4276 int
4277 creat_copy_attrs (old, new)
4278 char *old, *new;
4279 {
4280 struct FAB fab = cc$rms_fab;
4281 struct XABPRO xabpro;
4282 char aclbuf[256]; /* Choice of size is arbitrary. See below. */
4283 extern int vms_stmlf_recfm;
4284
4285 if (old)
4286 {
4287 fab.fab$b_fac = FAB$M_GET;
4288 fab.fab$l_fna = old;
4289 fab.fab$b_fns = strlen (old);
4290 fab.fab$l_xab = (char *) &xabpro;
4291 xabpro = cc$rms_xabpro;
4292 xabpro.xab$l_aclbuf = aclbuf;
4293 xabpro.xab$w_aclsiz = sizeof aclbuf;
4294 /* Call $OPEN to fill in the fab & xabpro fields. */
4295 if (SYS$OPEN (&fab, 0, 0) & 1)
4296 {
4297 SYS$CLOSE (&fab, 0, 0);
4298 fab.fab$l_alq = 0; /* zero the allocation quantity */
4299 if (xabpro.xab$w_acllen > 0)
4300 {
4301 if (xabpro.xab$w_acllen > sizeof aclbuf)
4302 /* If the acl buffer was too short, redo open with longer one.
4303 Wouldn't need to do this if there were some system imposed
4304 limit on the size of an ACL, but I can't find any such. */
4305 {
4306 xabpro.xab$l_aclbuf = (char *) alloca (xabpro.xab$w_acllen);
4307 xabpro.xab$w_aclsiz = xabpro.xab$w_acllen;
4308 if (SYS$OPEN (&fab, 0, 0) & 1)
4309 SYS$CLOSE (&fab, 0, 0);
4310 else
4311 old = 0;
4312 }
4313 }
4314 else
4315 xabpro.xab$l_aclbuf = 0;
4316 }
4317 else
4318 old = 0;
4319 }
4320 fab.fab$l_fna = new;
4321 fab.fab$b_fns = strlen (new);
4322 if (!old)
4323 {
4324 fab.fab$l_xab = 0;
4325 fab.fab$b_rfm = vms_stmlf_recfm ? FAB$C_STMLF : FAB$C_VAR;
4326 fab.fab$b_rat = FAB$M_CR;
4327 }
4328
4329 /* Set the file protections such that we will be able to manipulate
4330 this file. Once we are done writing and renaming it, we will set
4331 the protections back. */
4332 if (old)
4333 fab_final_pro = xabpro.xab$w_pro;
4334 else
4335 SYS$SETDFPROT (0, &fab_final_pro);
4336 xabpro.xab$w_pro &= 0xff0f; /* set O:rewd for now. This is set back later. */
4337
4338 /* Create the new file with either default attrs or attrs copied
4339 from old file. */
4340 if (!(SYS$CREATE (&fab, 0, 0) & 1))
4341 return -1;
4342 SYS$CLOSE (&fab, 0, 0);
4343 /* As this is a "replacement" for creat, return a file descriptor
4344 opened for writing. */
4345 return open (new, O_WRONLY);
4346 }
4347
4348 #ifdef creat
4349 #undef creat
4350 #include <varargs.h>
4351 #ifdef __GNUC__
4352 #ifndef va_count
4353 #define va_count(X) ((X) = *(((int *) &(va_alist)) - 1))
4354 #endif
4355 #endif
4356
4357 int
4358 sys_creat (va_alist)
4359 va_dcl
4360 {
4361 va_list list_incrementer;
4362 char *name;
4363 int mode;
4364 int rfd; /* related file descriptor */
4365 int fd; /* Our new file descriptor */
4366 int count;
4367 struct stat st_buf;
4368 char rfm[12];
4369 char rat[15];
4370 char mrs[13];
4371 char fsz[13];
4372 extern int vms_stmlf_recfm;
4373
4374 va_count (count);
4375 va_start (list_incrementer);
4376 name = va_arg (list_incrementer, char *);
4377 mode = va_arg (list_incrementer, int);
4378 if (count > 2)
4379 rfd = va_arg (list_incrementer, int);
4380 va_end (list_incrementer);
4381 if (count > 2)
4382 {
4383 /* Use information from the related file descriptor to set record
4384 format of the newly created file. */
4385 fstat (rfd, &st_buf);
4386 switch (st_buf.st_fab_rfm)
4387 {
4388 case FAB$C_FIX:
4389 strcpy (rfm, "rfm = fix");
4390 sprintf (mrs, "mrs = %d", st_buf.st_fab_mrs);
4391 strcpy (rat, "rat = ");
4392 if (st_buf.st_fab_rat & FAB$M_CR)
4393 strcat (rat, "cr");
4394 else if (st_buf.st_fab_rat & FAB$M_FTN)
4395 strcat (rat, "ftn");
4396 else if (st_buf.st_fab_rat & FAB$M_PRN)
4397 strcat (rat, "prn");
4398 if (st_buf.st_fab_rat & FAB$M_BLK)
4399 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4400 strcat (rat, ", blk");
4401 else
4402 strcat (rat, "blk");
4403 return creat (name, 0, rfm, rat, mrs);
4404
4405 case FAB$C_VFC:
4406 strcpy (rfm, "rfm = vfc");
4407 sprintf (fsz, "fsz = %d", st_buf.st_fab_fsz);
4408 strcpy (rat, "rat = ");
4409 if (st_buf.st_fab_rat & FAB$M_CR)
4410 strcat (rat, "cr");
4411 else if (st_buf.st_fab_rat & FAB$M_FTN)
4412 strcat (rat, "ftn");
4413 else if (st_buf.st_fab_rat & FAB$M_PRN)
4414 strcat (rat, "prn");
4415 if (st_buf.st_fab_rat & FAB$M_BLK)
4416 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4417 strcat (rat, ", blk");
4418 else
4419 strcat (rat, "blk");
4420 return creat (name, 0, rfm, rat, fsz);
4421
4422 case FAB$C_STM:
4423 strcpy (rfm, "rfm = stm");
4424 break;
4425
4426 case FAB$C_STMCR:
4427 strcpy (rfm, "rfm = stmcr");
4428 break;
4429
4430 case FAB$C_STMLF:
4431 strcpy (rfm, "rfm = stmlf");
4432 break;
4433
4434 case FAB$C_UDF:
4435 strcpy (rfm, "rfm = udf");
4436 break;
4437
4438 case FAB$C_VAR:
4439 strcpy (rfm, "rfm = var");
4440 break;
4441 }
4442 strcpy (rat, "rat = ");
4443 if (st_buf.st_fab_rat & FAB$M_CR)
4444 strcat (rat, "cr");
4445 else if (st_buf.st_fab_rat & FAB$M_FTN)
4446 strcat (rat, "ftn");
4447 else if (st_buf.st_fab_rat & FAB$M_PRN)
4448 strcat (rat, "prn");
4449 if (st_buf.st_fab_rat & FAB$M_BLK)
4450 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4451 strcat (rat, ", blk");
4452 else
4453 strcat (rat, "blk");
4454 }
4455 else
4456 {
4457 strcpy (rfm, vms_stmlf_recfm ? "rfm = stmlf" : "rfm=var");
4458 strcpy (rat, "rat=cr");
4459 }
4460 /* Until the VAX C RTL fixes the many bugs with modes, always use
4461 mode 0 to get the user's default protection. */
4462 fd = creat (name, 0, rfm, rat);
4463 if (fd < 0 && errno == EEXIST)
4464 {
4465 if (unlink (name) < 0)
4466 report_file_error ("delete", build_string (name));
4467 fd = creat (name, 0, rfm, rat);
4468 }
4469 return fd;
4470 }
4471 #endif /* creat */
4472
4473 /* fwrite to stdout is S L O W. Speed it up by using fputc...*/
4474 int
4475 sys_fwrite (ptr, size, num, fp)
4476 register char * ptr;
4477 FILE * fp;
4478 {
4479 register int tot = num * size;
4480
4481 while (tot--)
4482 fputc (*ptr++, fp);
4483 return num;
4484 }
4485
4486 /*
4487 * The VMS C library routine creat actually creates a new version of an
4488 * existing file rather than truncating the old version. There are times
4489 * when this is not the desired behavior, for instance, when writing an
4490 * auto save file (you only want one version), or when you don't have
4491 * write permission in the directory containing the file (but the file
4492 * itself is writable). Hence this routine, which is equivalent to
4493 * "close (creat (fn, 0));" on Unix if fn already exists.
4494 */
4495 int
4496 vms_truncate (fn)
4497 char *fn;
4498 {
4499 struct FAB xfab = cc$rms_fab;
4500 struct RAB xrab = cc$rms_rab;
4501 int status;
4502
4503 xfab.fab$l_fop = FAB$M_TEF; /* free allocated but unused blocks on close */
4504 xfab.fab$b_fac = FAB$M_TRN | FAB$M_GET; /* allow truncate and get access */
4505 xfab.fab$b_shr = FAB$M_NIL; /* allow no sharing - file must be locked */
4506 xfab.fab$l_fna = fn;
4507 xfab.fab$b_fns = strlen (fn);
4508 xfab.fab$l_dna = ";0"; /* default to latest version of the file */
4509 xfab.fab$b_dns = 2;
4510 xrab.rab$l_fab = &xfab;
4511
4512 /* This gibberish opens the file, positions to the first record, and
4513 deletes all records from there until the end of file. */
4514 if ((SYS$OPEN (&xfab) & 01) == 01)
4515 {
4516 if ((SYS$CONNECT (&xrab) & 01) == 01 &&
4517 (SYS$FIND (&xrab) & 01) == 01 &&
4518 (SYS$TRUNCATE (&xrab) & 01) == 01)
4519 status = 0;
4520 else
4521 status = -1;
4522 }
4523 else
4524 status = -1;
4525 SYS$CLOSE (&xfab);
4526 return status;
4527 }
4528
4529 /* Define this symbol to actually read SYSUAF.DAT. This requires either
4530 SYSPRV or a readable SYSUAF.DAT. */
4531
4532 #ifdef READ_SYSUAF
4533 /*
4534 * getuaf.c
4535 *
4536 * Routine to read the VMS User Authorization File and return
4537 * a specific user's record.
4538 */
4539
4540 static struct UAF retuaf;
4541
4542 struct UAF *
4543 get_uaf_name (uname)
4544 char * uname;
4545 {
4546 register status;
4547 struct FAB uaf_fab;
4548 struct RAB uaf_rab;
4549
4550 uaf_fab = cc$rms_fab;
4551 uaf_rab = cc$rms_rab;
4552 /* initialize fab fields */
4553 uaf_fab.fab$l_fna = "SYS$SYSTEM:SYSUAF.DAT";
4554 uaf_fab.fab$b_fns = 21;
4555 uaf_fab.fab$b_fac = FAB$M_GET;
4556 uaf_fab.fab$b_org = FAB$C_IDX;
4557 uaf_fab.fab$b_shr = FAB$M_GET|FAB$M_PUT|FAB$M_UPD|FAB$M_DEL;
4558 /* initialize rab fields */
4559 uaf_rab.rab$l_fab = &uaf_fab;
4560 /* open the User Authorization File */
4561 status = SYS$OPEN (&uaf_fab);
4562 if (!(status&1))
4563 {
4564 errno = EVMSERR;
4565 vaxc$errno = status;
4566 return 0;
4567 }
4568 status = SYS$CONNECT (&uaf_rab);
4569 if (!(status&1))
4570 {
4571 errno = EVMSERR;
4572 vaxc$errno = status;
4573 return 0;
4574 }
4575 /* read the requested record - index is in uname */
4576 uaf_rab.rab$l_kbf = uname;
4577 uaf_rab.rab$b_ksz = strlen (uname);
4578 uaf_rab.rab$b_rac = RAB$C_KEY;
4579 uaf_rab.rab$l_ubf = (char *)&retuaf;
4580 uaf_rab.rab$w_usz = sizeof retuaf;
4581 status = SYS$GET (&uaf_rab);
4582 if (!(status&1))
4583 {
4584 errno = EVMSERR;
4585 vaxc$errno = status;
4586 return 0;
4587 }
4588 /* close the User Authorization File */
4589 status = SYS$DISCONNECT (&uaf_rab);
4590 if (!(status&1))
4591 {
4592 errno = EVMSERR;
4593 vaxc$errno = status;
4594 return 0;
4595 }
4596 status = SYS$CLOSE (&uaf_fab);
4597 if (!(status&1))
4598 {
4599 errno = EVMSERR;
4600 vaxc$errno = status;
4601 return 0;
4602 }
4603 return &retuaf;
4604 }
4605
4606 struct UAF *
4607 get_uaf_uic (uic)
4608 unsigned long uic;
4609 {
4610 register status;
4611 struct FAB uaf_fab;
4612 struct RAB uaf_rab;
4613
4614 uaf_fab = cc$rms_fab;
4615 uaf_rab = cc$rms_rab;
4616 /* initialize fab fields */
4617 uaf_fab.fab$l_fna = "SYS$SYSTEM:SYSUAF.DAT";
4618 uaf_fab.fab$b_fns = 21;
4619 uaf_fab.fab$b_fac = FAB$M_GET;
4620 uaf_fab.fab$b_org = FAB$C_IDX;
4621 uaf_fab.fab$b_shr = FAB$M_GET|FAB$M_PUT|FAB$M_UPD|FAB$M_DEL;
4622 /* initialize rab fields */
4623 uaf_rab.rab$l_fab = &uaf_fab;
4624 /* open the User Authorization File */
4625 status = SYS$OPEN (&uaf_fab);
4626 if (!(status&1))
4627 {
4628 errno = EVMSERR;
4629 vaxc$errno = status;
4630 return 0;
4631 }
4632 status = SYS$CONNECT (&uaf_rab);
4633 if (!(status&1))
4634 {
4635 errno = EVMSERR;
4636 vaxc$errno = status;
4637 return 0;
4638 }
4639 /* read the requested record - index is in uic */
4640 uaf_rab.rab$b_krf = 1; /* 1st alternate key */
4641 uaf_rab.rab$l_kbf = (char *) &uic;
4642 uaf_rab.rab$b_ksz = sizeof uic;
4643 uaf_rab.rab$b_rac = RAB$C_KEY;
4644 uaf_rab.rab$l_ubf = (char *)&retuaf;
4645 uaf_rab.rab$w_usz = sizeof retuaf;
4646 status = SYS$GET (&uaf_rab);
4647 if (!(status&1))
4648 {
4649 errno = EVMSERR;
4650 vaxc$errno = status;
4651 return 0;
4652 }
4653 /* close the User Authorization File */
4654 status = SYS$DISCONNECT (&uaf_rab);
4655 if (!(status&1))
4656 {
4657 errno = EVMSERR;
4658 vaxc$errno = status;
4659 return 0;
4660 }
4661 status = SYS$CLOSE (&uaf_fab);
4662 if (!(status&1))
4663 {
4664 errno = EVMSERR;
4665 vaxc$errno = status;
4666 return 0;
4667 }
4668 return &retuaf;
4669 }
4670
4671 static struct passwd retpw;
4672
4673 struct passwd *
4674 cnv_uaf_pw (up)
4675 struct UAF * up;
4676 {
4677 char * ptr;
4678
4679 /* copy these out first because if the username is 32 chars, the next
4680 section will overwrite the first byte of the UIC */
4681 retpw.pw_uid = up->uaf$w_mem;
4682 retpw.pw_gid = up->uaf$w_grp;
4683
4684 /* I suppose this is not the best style, to possibly overwrite one
4685 byte beyond the end of the field, but what the heck... */
4686 ptr = &up->uaf$t_username[UAF$S_USERNAME];
4687 while (ptr[-1] == ' ')
4688 ptr--;
4689 *ptr = '\0';
4690 strcpy (retpw.pw_name, up->uaf$t_username);
4691
4692 /* the rest of these are counted ascii strings */
4693 strncpy (retpw.pw_gecos, &up->uaf$t_owner[1], up->uaf$t_owner[0]);
4694 retpw.pw_gecos[up->uaf$t_owner[0]] = '\0';
4695 strncpy (retpw.pw_dir, &up->uaf$t_defdev[1], up->uaf$t_defdev[0]);
4696 retpw.pw_dir[up->uaf$t_defdev[0]] = '\0';
4697 strncat (retpw.pw_dir, &up->uaf$t_defdir[1], up->uaf$t_defdir[0]);
4698 retpw.pw_dir[up->uaf$t_defdev[0] + up->uaf$t_defdir[0]] = '\0';
4699 strncpy (retpw.pw_shell, &up->uaf$t_defcli[1], up->uaf$t_defcli[0]);
4700 retpw.pw_shell[up->uaf$t_defcli[0]] = '\0';
4701
4702 return &retpw;
4703 }
4704 #else /* not READ_SYSUAF */
4705 static struct passwd retpw;
4706 #endif /* not READ_SYSUAF */
4707
4708 struct passwd *
4709 getpwnam (name)
4710 char * name;
4711 {
4712 #ifdef READ_SYSUAF
4713 struct UAF *up;
4714 #else
4715 char * user;
4716 char * dir;
4717 unsigned char * full;
4718 #endif /* READ_SYSUAF */
4719 char *ptr = name;
4720
4721 while (*ptr)
4722 {
4723 if ('a' <= *ptr && *ptr <= 'z')
4724 *ptr -= 040;
4725 ptr++;
4726 }
4727 #ifdef READ_SYSUAF
4728 if (!(up = get_uaf_name (name)))
4729 return 0;
4730 return cnv_uaf_pw (up);
4731 #else
4732 if (strcmp (name, getenv ("USER")) == 0)
4733 {
4734 retpw.pw_uid = getuid ();
4735 retpw.pw_gid = getgid ();
4736 strcpy (retpw.pw_name, name);
4737 if (full = egetenv ("FULLNAME"))
4738 strcpy (retpw.pw_gecos, full);
4739 else
4740 *retpw.pw_gecos = '\0';
4741 strcpy (retpw.pw_dir, egetenv ("HOME"));
4742 *retpw.pw_shell = '\0';
4743 return &retpw;
4744 }
4745 else
4746 return 0;
4747 #endif /* not READ_SYSUAF */
4748 }
4749
4750 struct passwd *
4751 getpwuid (uid)
4752 unsigned long uid;
4753 {
4754 #ifdef READ_SYSUAF
4755 struct UAF * up;
4756
4757 if (!(up = get_uaf_uic (uid)))
4758 return 0;
4759 return cnv_uaf_pw (up);
4760 #else
4761 if (uid == sys_getuid ())
4762 return getpwnam (egetenv ("USER"));
4763 else
4764 return 0;
4765 #endif /* not READ_SYSUAF */
4766 }
4767
4768 /* return total address space available to the current process. This is
4769 the sum of the current p0 size, p1 size and free page table entries
4770 available. */
4771 int
4772 vlimit ()
4773 {
4774 int item_code;
4775 unsigned long free_pages;
4776 unsigned long frep0va;
4777 unsigned long frep1va;
4778 register status;
4779
4780 item_code = JPI$_FREPTECNT;
4781 if (((status = LIB$GETJPI (&item_code, 0, 0, &free_pages)) & 1) == 0)
4782 {
4783 errno = EVMSERR;
4784 vaxc$errno = status;
4785 return -1;
4786 }
4787 free_pages *= 512;
4788
4789 item_code = JPI$_FREP0VA;
4790 if (((status = LIB$GETJPI (&item_code, 0, 0, &frep0va)) & 1) == 0)
4791 {
4792 errno = EVMSERR;
4793 vaxc$errno = status;
4794 return -1;
4795 }
4796 item_code = JPI$_FREP1VA;
4797 if (((status = LIB$GETJPI (&item_code, 0, 0, &frep1va)) & 1) == 0)
4798 {
4799 errno = EVMSERR;
4800 vaxc$errno = status;
4801 return -1;
4802 }
4803
4804 return free_pages + frep0va + (0x7fffffff - frep1va);
4805 }
4806
4807 int
4808 define_logical_name (varname, string)
4809 char *varname;
4810 char *string;
4811 {
4812 struct dsc$descriptor_s strdsc =
4813 {strlen (string), DSC$K_DTYPE_T, DSC$K_CLASS_S, string};
4814 struct dsc$descriptor_s envdsc =
4815 {strlen (varname), DSC$K_DTYPE_T, DSC$K_CLASS_S, varname};
4816 struct dsc$descriptor_s lnmdsc =
4817 {7, DSC$K_DTYPE_T, DSC$K_CLASS_S, "LNM$JOB"};
4818
4819 return LIB$SET_LOGICAL (&envdsc, &strdsc, &lnmdsc, 0, 0);
4820 }
4821
4822 int
4823 delete_logical_name (varname)
4824 char *varname;
4825 {
4826 struct dsc$descriptor_s envdsc =
4827 {strlen (varname), DSC$K_DTYPE_T, DSC$K_CLASS_S, varname};
4828 struct dsc$descriptor_s lnmdsc =
4829 {7, DSC$K_DTYPE_T, DSC$K_CLASS_S, "LNM$JOB"};
4830
4831 return LIB$DELETE_LOGICAL (&envdsc, &lnmdsc);
4832 }
4833
4834 int
4835 ulimit ()
4836 {
4837 return 0;
4838 }
4839
4840 int
4841 setpgrp ()
4842 {
4843 return 0;
4844 }
4845
4846 int
4847 execvp ()
4848 {
4849 error ("execvp system call not implemented");
4850 return -1;
4851 }
4852
4853 int
4854 rename (from, to)
4855 char *from, *to;
4856 {
4857 int status;
4858 struct FAB from_fab = cc$rms_fab, to_fab = cc$rms_fab;
4859 struct NAM from_nam = cc$rms_nam, to_nam = cc$rms_nam;
4860 char from_esn[NAM$C_MAXRSS];
4861 char to_esn[NAM$C_MAXRSS];
4862
4863 from_fab.fab$l_fna = from;
4864 from_fab.fab$b_fns = strlen (from);
4865 from_fab.fab$l_nam = &from_nam;
4866 from_fab.fab$l_fop = FAB$M_NAM;
4867
4868 from_nam.nam$l_esa = from_esn;
4869 from_nam.nam$b_ess = sizeof from_esn;
4870
4871 to_fab.fab$l_fna = to;
4872 to_fab.fab$b_fns = strlen (to);
4873 to_fab.fab$l_nam = &to_nam;
4874 to_fab.fab$l_fop = FAB$M_NAM;
4875
4876 to_nam.nam$l_esa = to_esn;
4877 to_nam.nam$b_ess = sizeof to_esn;
4878
4879 status = SYS$RENAME (&from_fab, 0, 0, &to_fab);
4880
4881 if (status & 1)
4882 return 0;
4883 else
4884 {
4885 if (status == RMS$_DEV)
4886 errno = EXDEV;
4887 else
4888 errno = EVMSERR;
4889 vaxc$errno = status;
4890 return -1;
4891 }
4892 }
4893
4894 /* This function renames a file like `rename', but it strips
4895 the version number from the "to" filename, such that the "to" file is
4896 will always be a new version. It also sets the file protection once it is
4897 finished. The protection that we will use is stored in fab_final_pro,
4898 and was set when we did a creat_copy_attrs to create the file that we
4899 are renaming.
4900
4901 We could use the chmod function, but Eunichs uses 3 bits per user category
4902 to describe the protection, and VMS uses 4 (write and delete are separate
4903 bits). To maintain portability, the VMS implementation of `chmod' wires
4904 the W and D bits together. */
4905
4906
4907 static struct fibdef fib; /* We need this initialized to zero */
4908 char vms_file_written[NAM$C_MAXRSS];
4909
4910 int
4911 rename_sans_version (from,to)
4912 char *from, *to;
4913 {
4914 short int chan;
4915 int stat;
4916 short int iosb[4];
4917 int status;
4918 struct FAB to_fab = cc$rms_fab;
4919 struct NAM to_nam = cc$rms_nam;
4920 struct dsc$descriptor fib_d ={sizeof (fib),0,0,(char*) &fib};
4921 struct dsc$descriptor fib_attr[2]
4922 = {{sizeof (fab_final_pro),ATR$C_FPRO,0,(char*) &fab_final_pro},{0,0,0,0}};
4923 char to_esn[NAM$C_MAXRSS];
4924
4925 $DESCRIPTOR (disk,to_esn);
4926
4927 to_fab.fab$l_fna = to;
4928 to_fab.fab$b_fns = strlen (to);
4929 to_fab.fab$l_nam = &to_nam;
4930 to_fab.fab$l_fop = FAB$M_NAM;
4931
4932 to_nam.nam$l_esa = to_esn;
4933 to_nam.nam$b_ess = sizeof to_esn;
4934
4935 status = SYS$PARSE (&to_fab, 0, 0); /* figure out the full file name */
4936
4937 if (to_nam.nam$l_fnb && NAM$M_EXP_VER)
4938 *(to_nam.nam$l_ver) = '\0';
4939
4940 stat = rename (from, to_esn);
4941 if (stat < 0)
4942 return stat;
4943
4944 strcpy (vms_file_written, to_esn);
4945
4946 to_fab.fab$l_fna = vms_file_written; /* this points to the versionless name */
4947 to_fab.fab$b_fns = strlen (vms_file_written);
4948
4949 /* Now set the file protection to the correct value */
4950 SYS$OPEN (&to_fab, 0, 0); /* This fills in the nam$w_fid fields */
4951
4952 /* Copy these fields into the fib */
4953 fib.fib$r_fid_overlay.fib$w_fid[0] = to_nam.nam$w_fid[0];
4954 fib.fib$r_fid_overlay.fib$w_fid[1] = to_nam.nam$w_fid[1];
4955 fib.fib$r_fid_overlay.fib$w_fid[2] = to_nam.nam$w_fid[2];
4956
4957 SYS$CLOSE (&to_fab, 0, 0);
4958
4959 stat = SYS$ASSIGN (&disk, &chan, 0, 0); /* open a channel to the disk */
4960 if (!stat)
4961 LIB$SIGNAL (stat);
4962 stat = SYS$QIOW (0, chan, IO$_MODIFY, iosb, 0, 0, &fib_d,
4963 0, 0, 0, &fib_attr, 0);
4964 if (!stat)
4965 LIB$SIGNAL (stat);
4966 stat = SYS$DASSGN (chan);
4967 if (!stat)
4968 LIB$SIGNAL (stat);
4969 strcpy (vms_file_written, to_esn); /* We will write this to the terminal*/
4970 return 0;
4971 }
4972
4973 int
4974 link (file, new)
4975 char * file, * new;
4976 {
4977 register status;
4978 struct FAB fab;
4979 struct NAM nam;
4980 unsigned short fid[3];
4981 char esa[NAM$C_MAXRSS];
4982
4983 fab = cc$rms_fab;
4984 fab.fab$l_fop = FAB$M_OFP;
4985 fab.fab$l_fna = file;
4986 fab.fab$b_fns = strlen (file);
4987 fab.fab$l_nam = &nam;
4988
4989 nam = cc$rms_nam;
4990 nam.nam$l_esa = esa;
4991 nam.nam$b_ess = NAM$C_MAXRSS;
4992
4993 status = SYS$PARSE (&fab);
4994 if ((status & 1) == 0)
4995 {
4996 errno = EVMSERR;
4997 vaxc$errno = status;
4998 return -1;
4999 }
5000 status = SYS$SEARCH (&fab);
5001 if ((status & 1) == 0)
5002 {
5003 errno = EVMSERR;
5004 vaxc$errno = status;
5005 return -1;
5006 }
5007
5008 fid[0] = nam.nam$w_fid[0];
5009 fid[1] = nam.nam$w_fid[1];
5010 fid[2] = nam.nam$w_fid[2];
5011
5012 fab.fab$l_fna = new;
5013 fab.fab$b_fns = strlen (new);
5014
5015 status = SYS$PARSE (&fab);
5016 if ((status & 1) == 0)
5017 {
5018 errno = EVMSERR;
5019 vaxc$errno = status;
5020 return -1;
5021 }
5022
5023 nam.nam$w_fid[0] = fid[0];
5024 nam.nam$w_fid[1] = fid[1];
5025 nam.nam$w_fid[2] = fid[2];
5026
5027 nam.nam$l_esa = nam.nam$l_name;
5028 nam.nam$b_esl = nam.nam$b_name + nam.nam$b_type + nam.nam$b_ver;
5029
5030 status = SYS$ENTER (&fab);
5031 if ((status & 1) == 0)
5032 {
5033 errno = EVMSERR;
5034 vaxc$errno = status;
5035 return -1;
5036 }
5037
5038 return 0;
5039 }
5040
5041 void
5042 croak (badfunc)
5043 char *badfunc;
5044 {
5045 printf ("%s not yet implemented\r\n", badfunc);
5046 reset_sys_modes ();
5047 exit (1);
5048 }
5049
5050 long
5051 random ()
5052 {
5053 /* Arrange to return a range centered on zero. */
5054 return rand () - (1 << 30);
5055 }
5056
5057 void
5058 srandom (seed)
5059 {
5060 srand (seed);
5061 }
5062 #endif /* VMS */
5063 \f
5064 #ifdef AIXHFT
5065
5066 /* Called from init_sys_modes. */
5067 void
5068 hft_init ()
5069 {
5070 int junk;
5071
5072 /* If we're not on an HFT we shouldn't do any of this. We determine
5073 if we are on an HFT by trying to get an HFT error code. If this
5074 call fails, we're not on an HFT. */
5075 #ifdef IBMR2AIX
5076 if (ioctl (0, HFQERROR, &junk) < 0)
5077 return;
5078 #else /* not IBMR2AIX */
5079 if (ioctl (0, HFQEIO, 0) < 0)
5080 return;
5081 #endif /* not IBMR2AIX */
5082
5083 /* On AIX the default hft keyboard mapping uses backspace rather than delete
5084 as the rubout key's ASCII code. Here this is changed. The bug is that
5085 there's no way to determine the old mapping, so in reset_sys_modes
5086 we need to assume that the normal map had been present. Of course, this
5087 code also doesn't help if on a terminal emulator which doesn't understand
5088 HFT VTD's. */
5089 {
5090 struct hfbuf buf;
5091 struct hfkeymap keymap;
5092
5093 buf.hf_bufp = (char *)&keymap;
5094 buf.hf_buflen = sizeof (keymap);
5095 keymap.hf_nkeys = 2;
5096 keymap.hfkey[0].hf_kpos = 15;
5097 keymap.hfkey[0].hf_kstate = HFMAPCHAR | HFSHFNONE;
5098 #ifdef IBMR2AIX
5099 keymap.hfkey[0].hf_keyidh = '<';
5100 #else /* not IBMR2AIX */
5101 keymap.hfkey[0].hf_page = '<';
5102 #endif /* not IBMR2AIX */
5103 keymap.hfkey[0].hf_char = 127;
5104 keymap.hfkey[1].hf_kpos = 15;
5105 keymap.hfkey[1].hf_kstate = HFMAPCHAR | HFSHFSHFT;
5106 #ifdef IBMR2AIX
5107 keymap.hfkey[1].hf_keyidh = '<';
5108 #else /* not IBMR2AIX */
5109 keymap.hfkey[1].hf_page = '<';
5110 #endif /* not IBMR2AIX */
5111 keymap.hfkey[1].hf_char = 127;
5112 hftctl (0, HFSKBD, &buf);
5113 }
5114 /* The HFT system on AIX doesn't optimize for scrolling, so it's really ugly
5115 at times. */
5116 line_ins_del_ok = char_ins_del_ok = 0;
5117 }
5118
5119 /* Reset the rubout key to backspace. */
5120
5121 void
5122 hft_reset ()
5123 {
5124 struct hfbuf buf;
5125 struct hfkeymap keymap;
5126 int junk;
5127
5128 #ifdef IBMR2AIX
5129 if (ioctl (0, HFQERROR, &junk) < 0)
5130 return;
5131 #else /* not IBMR2AIX */
5132 if (ioctl (0, HFQEIO, 0) < 0)
5133 return;
5134 #endif /* not IBMR2AIX */
5135
5136 buf.hf_bufp = (char *)&keymap;
5137 buf.hf_buflen = sizeof (keymap);
5138 keymap.hf_nkeys = 2;
5139 keymap.hfkey[0].hf_kpos = 15;
5140 keymap.hfkey[0].hf_kstate = HFMAPCHAR | HFSHFNONE;
5141 #ifdef IBMR2AIX
5142 keymap.hfkey[0].hf_keyidh = '<';
5143 #else /* not IBMR2AIX */
5144 keymap.hfkey[0].hf_page = '<';
5145 #endif /* not IBMR2AIX */
5146 keymap.hfkey[0].hf_char = 8;
5147 keymap.hfkey[1].hf_kpos = 15;
5148 keymap.hfkey[1].hf_kstate = HFMAPCHAR | HFSHFSHFT;
5149 #ifdef IBMR2AIX
5150 keymap.hfkey[1].hf_keyidh = '<';
5151 #else /* not IBMR2AIX */
5152 keymap.hfkey[1].hf_page = '<';
5153 #endif /* not IBMR2AIX */
5154 keymap.hfkey[1].hf_char = 8;
5155 hftctl (0, HFSKBD, &buf);
5156 }
5157
5158 #endif /* AIXHFT */
5159
5160 #ifdef USE_DL_STUBS
5161
5162 /* These are included on Sunos 4.1 when we do not use shared libraries.
5163 X11 libraries may refer to these functions but (we hope) do not
5164 actually call them. */
5165
5166 void *
5167 dlopen ()
5168 {
5169 return 0;
5170 }
5171
5172 void *
5173 dlsym ()
5174 {
5175 return 0;
5176 }
5177
5178 int
5179 dlclose ()
5180 {
5181 return -1;
5182 }
5183
5184 #endif /* USE_DL_STUBS */
5185 \f
5186 #ifndef BSTRING
5187
5188 #ifndef bzero
5189
5190 void
5191 bzero (b, length)
5192 register char *b;
5193 register int length;
5194 {
5195 #ifdef VMS
5196 short zero = 0;
5197 long max_str = 65535;
5198
5199 while (length > max_str) {
5200 (void) LIB$MOVC5 (&zero, &zero, &zero, &max_str, b);
5201 length -= max_str;
5202 b += max_str;
5203 }
5204 max_str = length;
5205 (void) LIB$MOVC5 (&zero, &zero, &zero, &max_str, b);
5206 #else
5207 while (length-- > 0)
5208 *b++ = 0;
5209 #endif /* not VMS */
5210 }
5211
5212 #endif /* no bzero */
5213 #endif /* BSTRING */
5214
5215 #if (!defined (BSTRING) && !defined (bcopy)) || defined (NEED_BCOPY)
5216 #undef bcopy
5217
5218 /* Saying `void' requires a declaration, above, where bcopy is used
5219 and that declaration causes pain for systems where bcopy is a macro. */
5220 bcopy (b1, b2, length)
5221 register char *b1;
5222 register char *b2;
5223 register int length;
5224 {
5225 #ifdef VMS
5226 long max_str = 65535;
5227
5228 while (length > max_str) {
5229 (void) LIB$MOVC3 (&max_str, b1, b2);
5230 length -= max_str;
5231 b1 += max_str;
5232 b2 += max_str;
5233 }
5234 max_str = length;
5235 (void) LIB$MOVC3 (&length, b1, b2);
5236 #else
5237 while (length-- > 0)
5238 *b2++ = *b1++;
5239 #endif /* not VMS */
5240 }
5241 #endif /* (!defined (BSTRING) && !defined (bcopy)) || defined (NEED_BCOPY) */
5242
5243 #ifndef BSTRING
5244 #ifndef bcmp
5245 int
5246 bcmp (b1, b2, length) /* This could be a macro! */
5247 register char *b1;
5248 register char *b2;
5249 register int length;
5250 {
5251 #ifdef VMS
5252 struct dsc$descriptor_s src1 = {length, DSC$K_DTYPE_T, DSC$K_CLASS_S, b1};
5253 struct dsc$descriptor_s src2 = {length, DSC$K_DTYPE_T, DSC$K_CLASS_S, b2};
5254
5255 return STR$COMPARE (&src1, &src2);
5256 #else
5257 while (length-- > 0)
5258 if (*b1++ != *b2++)
5259 return 1;
5260
5261 return 0;
5262 #endif /* not VMS */
5263 }
5264 #endif /* no bcmp */
5265 #endif /* not BSTRING */
5266 \f
5267 #ifndef HAVE_STRSIGNAL
5268 char *
5269 strsignal (code)
5270 int code;
5271 {
5272 char *signame = 0;
5273
5274 if (0 <= code && code < NSIG)
5275 {
5276 #ifdef VMS
5277 signame = sys_errlist[code];
5278 #else
5279 /* Cast to suppress warning if the table has const char *. */
5280 signame = (char *) sys_siglist[code];
5281 #endif
5282 }
5283
5284 return signame;
5285 }
5286 #endif /* HAVE_STRSIGNAL */
5287
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