HCoop / bpt / emacs.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
(jka-compr-insert-file-contents):
[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 Free Software Foundation, Inc.
3
4 This file is part of GNU Emacs.
5
6 GNU Emacs is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
9 any later version.
10
11 GNU Emacs is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with GNU Emacs; see the file COPYING. If not, write to
18 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
20
21
22 #include <signal.h>
23 #include <setjmp.h>
24
25 #include <config.h>
26 #include "lisp.h"
27 #include "blockinput.h"
28 #undef NULL
29
30 #define min(x,y) ((x) > (y) ? (y) : (x))
31
32 /* In this file, open, read and write refer to the system calls,
33 not our sugared interfaces sys_open, sys_read and sys_write.
34 Contrariwise, for systems where we use the system calls directly,
35 define sys_read, etc. here as aliases for them. */
36 #ifndef read
37 #define sys_read read
38 #define sys_write write
39 #endif /* `read' is not a macro */
40
41 #undef read
42 #undef write
43
44 #ifdef WINDOWSNT
45 #define read _read
46 #define write _write
47 #include <windows.h>
48 extern int errno;
49 #endif /* not WINDOWSNT */
50
51 #ifndef close
52 #define sys_close close
53 #else
54 #undef close
55 #endif
56
57 #ifndef open
58 #define sys_open open
59 #else /* `open' is a macro */
60 #undef open
61 #endif /* `open' is a macro */
62
63 /* Does anyone other than VMS need this? */
64 #ifndef fwrite
65 #define sys_fwrite fwrite
66 #else
67 #undef fwrite
68 #endif
69
70 #ifndef HAVE_H_ERRNO
71 extern int h_errno;
72 #endif
73
74 #include <stdio.h>
75 #include <sys/types.h>
76 #include <sys/stat.h>
77 #include <errno.h>
78
79 /* Get _POSIX_VDISABLE, if it is available. */
80 #ifdef HAVE_UNISTD_H
81 #include <unistd.h>
82 #endif
83
84 /* Get SI_SRPC_DOMAIN, if it is available. */
85 #ifdef HAVE_SYS_SYSTEMINFO_H
86 #include <sys/systeminfo.h>
87 #endif
88
89 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida, MW Aug 1993 */
90 #include <dos.h>
91 #include "dosfns.h"
92 #include "msdos.h"
93 #include <sys/param.h>
94
95 #if __DJGPP__ > 1
96 extern int etext;
97 extern unsigned start __asm__ ("start");
98 #endif
99 #endif
100
101 extern int errno;
102
103 #ifdef VMS
104 #include <rms.h>
105 #include <ttdef.h>
106 #include <tt2def.h>
107 #include <iodef.h>
108 #include <ssdef.h>
109 #include <descrip.h>
110 #include <fibdef.h>
111 #include <atrdef.h>
112 #include <ctype.h>
113 #include <string.h>
114 #ifdef __GNUC__
115 #include <sys/file.h>
116 #else
117 #include <file.h>
118 #endif
119 #undef F_SETFL
120 #ifndef RAB$C_BID
121 #include <rab.h>
122 #endif
123 #define MAXIOSIZE (32 * PAGESIZE) /* Don't I/O more than 32 blocks at a time */
124 #endif /* VMS */
125
126 #ifndef BSD4_1
127 #ifdef BSD_SYSTEM /* avoid writing defined (BSD_SYSTEM) || defined (USG)
128 because the vms compiler doesn't grok `defined' */
129 #include <fcntl.h>
130 #endif
131 #ifdef USG
132 #ifndef USG5
133 #include <fcntl.h>
134 #endif
135 #endif
136 #endif /* not 4.1 bsd */
137
138 #ifndef MSDOS
139 #include <sys/ioctl.h>
140 #endif
141
142 #include "systty.h"
143 #include "syswait.h"
144
145 #ifdef BROKEN_TIOCGWINSZ
146 #undef TIOCGWINSZ
147 #undef TIOCSWINSZ
148 #endif
149
150 #if defined(USG) || defined(DGUX)
151 #include <sys/utsname.h>
152 #include <string.h>
153 #ifndef MEMORY_IN_STRING_H
154 #include <memory.h>
155 #endif
156 #if defined (TIOCGWINSZ) || defined (ISC4_0)
157 #ifdef NEED_SIOCTL
158 #include <sys/sioctl.h>
159 #endif
160 #ifdef NEED_PTEM_H
161 #include <sys/stream.h>
162 #include <sys/ptem.h>
163 #endif
164 #endif /* TIOCGWINSZ or ISC4_0 */
165 #endif /* USG or DGUX */
166
167 extern int quit_char;
168
169 #include "frame.h"
170 #include "window.h"
171 #include "termhooks.h"
172 #include "termchar.h"
173 #include "termopts.h"
174 #include "dispextern.h"
175 #include "process.h"
176
177 #ifdef WINDOWSNT
178 #include <direct.h>
179 /* In process.h which conflicts with the local copy. */
180 #define _P_WAIT 0
181 int _CRTAPI1 _spawnlp (int, const char *, const char *, ...);
182 int _CRTAPI1 _getpid (void);
183 #endif
184
185 #ifdef NONSYSTEM_DIR_LIBRARY
186 #include "ndir.h"
187 #endif /* NONSYSTEM_DIR_LIBRARY */
188
189 #include "syssignal.h"
190 #include "systime.h"
191 #ifdef HAVE_UTIME_H
192 #include <utime.h>
193 #endif
194
195 #ifndef HAVE_UTIMES
196 #ifndef HAVE_STRUCT_UTIMBUF
197 /* We want to use utime rather than utimes, but we couldn't find the
198 structure declaration. We'll use the traditional one. */
199 struct utimbuf {
200 long actime;
201 long modtime;
202 };
203 #endif
204 #endif
205
206 #ifndef VFORK_RETURN_TYPE
207 #define VFORK_RETURN_TYPE int
208 #endif
209
210 /* LPASS8 is new in 4.3, and makes cbreak mode provide all 8 bits. */
211 #ifndef LPASS8
212 #define LPASS8 0
213 #endif
214
215 #ifdef BSD4_1
216 #define LNOFLSH 0100000
217 #endif
218
219 static int baud_convert[] =
220 #ifdef BAUD_CONVERT
221 BAUD_CONVERT;
222 #else
223 {
224 0, 50, 75, 110, 135, 150, 200, 300, 600, 1200,
225 1800, 2400, 4800, 9600, 19200, 38400
226 };
227 #endif
228
229 #if defined (HAVE_LIBNCURSES) && ! defined (NCURSES_OSPEED_T)
230 extern short ospeed;
231 #else
232 #if defined (HAVE_TERMIOS_H) && defined (LINUX)
233 #include <termios.h>
234 /* HJL's version of libc is said to need this on the Alpha.
235 On the other hand, DEC OSF1 on the Alpha needs ospeed to be a short. */
236 extern speed_t ospeed;
237 #else
238 extern short ospeed;
239 #endif
240 #endif
241
242 /* The file descriptor for Emacs's input terminal.
243 Under Unix, this is normally zero except when using X;
244 under VMS, we place the input channel number here. */
245 int input_fd;
246 \f
247 /* Specify a different file descriptor for further input operations. */
248
249 void
250 change_input_fd (fd)
251 int fd;
252 {
253 input_fd = fd;
254 }
255
256 /* Discard pending input on descriptor input_fd. */
257
258 void
259 discard_tty_input ()
260 {
261 #ifndef WINDOWSNT
262 struct emacs_tty buf;
263
264 if (noninteractive)
265 return;
266
267 /* Discarding input is not safe when the input could contain
268 replies from the X server. So don't do it. */
269 if (read_socket_hook)
270 return;
271
272 #ifdef VMS
273 end_kbd_input ();
274 SYS$QIOW (0, input_fd, IO$_READVBLK|IO$M_PURGE, input_iosb, 0, 0,
275 &buf.main, 0, 0, terminator_mask, 0, 0);
276 queue_kbd_input ();
277 #else /* not VMS */
278 #ifdef APOLLO
279 {
280 int zero = 0;
281 ioctl (input_fd, TIOCFLUSH, &zero);
282 }
283 #else /* not Apollo */
284 #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */
285 while (dos_keyread () != -1)
286 ;
287 #else /* not MSDOS */
288 EMACS_GET_TTY (input_fd, &buf);
289 EMACS_SET_TTY (input_fd, &buf, 0);
290 #endif /* not MSDOS */
291 #endif /* not Apollo */
292 #endif /* not VMS */
293 #endif /* not WINDOWSNT */
294 }
295
296 #ifdef SIGTSTP
297
298 /* Arrange for character C to be read as the next input from
299 the terminal. */
300
301 stuff_char (c)
302 char c;
303 {
304 if (read_socket_hook)
305 return;
306
307 /* Should perhaps error if in batch mode */
308 #ifdef TIOCSTI
309 ioctl (input_fd, TIOCSTI, &c);
310 #else /* no TIOCSTI */
311 error ("Cannot stuff terminal input characters in this version of Unix");
312 #endif /* no TIOCSTI */
313 }
314
315 #endif /* SIGTSTP */
316 \f
317 void
318 init_baud_rate ()
319 {
320 if (noninteractive)
321 ospeed = 0;
322 else
323 {
324 #ifdef INIT_BAUD_RATE
325 INIT_BAUD_RATE ();
326 #else
327 #ifdef DOS_NT
328 ospeed = 15;
329 #else /* not DOS_NT */
330 #ifdef VMS
331 struct sensemode sg;
332
333 SYS$QIOW (0, input_fd, IO$_SENSEMODE, &sg, 0, 0,
334 &sg.class, 12, 0, 0, 0, 0 );
335 ospeed = sg.xmit_baud;
336 #else /* not VMS */
337 #ifdef HAVE_TERMIOS
338 struct termios sg;
339
340 sg.c_cflag = B9600;
341 tcgetattr (input_fd, &sg);
342 ospeed = cfgetospeed (&sg);
343 #if defined (USE_GETOBAUD) && defined (getobaud)
344 /* m88k-motorola-sysv3 needs this (ghazi@noc.rutgers.edu) 9/1/94. */
345 if (ospeed == 0)
346 ospeed = getobaud (sg.c_cflag);
347 #endif
348 #else /* neither VMS nor TERMIOS */
349 #ifdef HAVE_TERMIO
350 struct termio sg;
351
352 sg.c_cflag = B9600;
353 #ifdef HAVE_TCATTR
354 tcgetattr (input_fd, &sg);
355 #else
356 ioctl (input_fd, TCGETA, &sg);
357 #endif
358 ospeed = sg.c_cflag & CBAUD;
359 #else /* neither VMS nor TERMIOS nor TERMIO */
360 struct sgttyb sg;
361
362 sg.sg_ospeed = B9600;
363 if (ioctl (input_fd, TIOCGETP, &sg) < 0)
364 abort ();
365 ospeed = sg.sg_ospeed;
366 #endif /* not HAVE_TERMIO */
367 #endif /* not HAVE_TERMIOS */
368 #endif /* not VMS */
369 #endif /* not DOS_NT */
370 #endif /* not INIT_BAUD_RATE */
371 }
372
373 baud_rate = (ospeed < sizeof baud_convert / sizeof baud_convert[0]
374 ? baud_convert[ospeed] : 9600);
375 if (baud_rate == 0)
376 baud_rate = 1200;
377 }
378
379 /*ARGSUSED*/
380 set_exclusive_use (fd)
381 int fd;
382 {
383 #ifdef FIOCLEX
384 ioctl (fd, FIOCLEX, 0);
385 #endif
386 /* Ok to do nothing if this feature does not exist */
387 }
388 \f
389 #ifndef subprocesses
390
391 wait_without_blocking ()
392 {
393 #ifdef BSD_SYSTEM
394 wait3 (0, WNOHANG | WUNTRACED, 0);
395 #else
396 croak ("wait_without_blocking");
397 #endif
398 synch_process_alive = 0;
399 }
400
401 #endif /* not subprocesses */
402
403 int wait_debugging; /* Set nonzero to make following function work under dbx
404 (at least for bsd). */
405
406 SIGTYPE
407 wait_for_termination_signal ()
408 {}
409
410 /* Wait for subprocess with process id `pid' to terminate and
411 make sure it will get eliminated (not remain forever as a zombie) */
412
413 void
414 wait_for_termination (pid)
415 int pid;
416 {
417 while (1)
418 {
419 #ifdef subprocesses
420 #ifdef VMS
421 int status;
422
423 status = SYS$FORCEX (&pid, 0, 0);
424 break;
425 #else /* not VMS */
426 #if defined (BSD_SYSTEM) || (defined (HPUX) && !defined (HPUX_5))
427 /* Note that kill returns -1 even if the process is just a zombie now.
428 But inevitably a SIGCHLD interrupt should be generated
429 and child_sig will do wait3 and make the process go away. */
430 /* There is some indication that there is a bug involved with
431 termination of subprocesses, perhaps involving a kernel bug too,
432 but no idea what it is. Just as a hunch we signal SIGCHLD to see
433 if that causes the problem to go away or get worse. */
434 sigsetmask (sigmask (SIGCHLD));
435 if (0 > kill (pid, 0))
436 {
437 sigsetmask (SIGEMPTYMASK);
438 kill (getpid (), SIGCHLD);
439 break;
440 }
441 if (wait_debugging)
442 sleep (1);
443 else
444 sigpause (SIGEMPTYMASK);
445 #else /* not BSD_SYSTEM, and not HPUX version >= 6 */
446 #if defined (UNIPLUS)
447 if (0 > kill (pid, 0))
448 break;
449 wait (0);
450 #else /* neither BSD_SYSTEM nor UNIPLUS: random sysV */
451 #ifdef POSIX_SIGNALS /* would this work for LINUX as well? */
452 sigblock (sigmask (SIGCHLD));
453 if (0 > kill (pid, 0))
454 {
455 sigunblock (sigmask (SIGCHLD));
456 break;
457 }
458 sigpause (SIGEMPTYMASK);
459 #else /* not POSIX_SIGNALS */
460 #ifdef HAVE_SYSV_SIGPAUSE
461 sighold (SIGCHLD);
462 if (0 > kill (pid, 0))
463 {
464 sigrelse (SIGCHLD);
465 break;
466 }
467 sigpause (SIGCHLD);
468 #else /* not HAVE_SYSV_SIGPAUSE */
469 #ifdef WINDOWSNT
470 wait (0);
471 break;
472 #else /* not WINDOWSNT */
473 if (0 > kill (pid, 0))
474 break;
475 /* Using sleep instead of pause avoids timing error.
476 If the inferior dies just before the sleep,
477 we lose just one second. */
478 sleep (1);
479 #endif /* not WINDOWSNT */
480 #endif /* not HAVE_SYSV_SIGPAUSE */
481 #endif /* not POSIX_SIGNALS */
482 #endif /* not UNIPLUS */
483 #endif /* not BSD_SYSTEM, and not HPUX version >= 6 */
484 #endif /* not VMS */
485 #else /* not subprocesses */
486 #if __DJGPP__ > 1
487 break;
488 #else /* not __DJGPP__ > 1 */
489 #ifndef BSD4_1
490 if (kill (pid, 0) < 0)
491 break;
492 wait (0);
493 #else /* BSD4_1 */
494 int status;
495 status = wait (0);
496 if (status == pid || status == -1)
497 break;
498 #endif /* BSD4_1 */
499 #endif /* not __DJGPP__ > 1*/
500 #endif /* not subprocesses */
501 }
502 }
503
504 #ifdef subprocesses
505
506 /*
507 * flush any pending output
508 * (may flush input as well; it does not matter the way we use it)
509 */
510
511 void
512 flush_pending_output (channel)
513 int channel;
514 {
515 #ifdef HAVE_TERMIOS
516 /* If we try this, we get hit with SIGTTIN, because
517 the child's tty belongs to the child's pgrp. */
518 #else
519 #ifdef TCFLSH
520 ioctl (channel, TCFLSH, 1);
521 #else
522 #ifdef TIOCFLUSH
523 int zero = 0;
524 /* 3rd arg should be ignored
525 but some 4.2 kernels actually want the address of an int
526 and nonzero means something different. */
527 ioctl (channel, TIOCFLUSH, &zero);
528 #endif
529 #endif
530 #endif
531 }
532 \f
533 #ifndef VMS
534 /* Set up the terminal at the other end of a pseudo-terminal that
535 we will be controlling an inferior through.
536 It should not echo or do line-editing, since that is done
537 in Emacs. No padding needed for insertion into an Emacs buffer. */
538
539 void
540 child_setup_tty (out)
541 int out;
542 {
543 #ifndef DOS_NT
544 struct emacs_tty s;
545
546 EMACS_GET_TTY (out, &s);
547
548 #if defined (HAVE_TERMIO) || defined (HAVE_TERMIOS)
549 s.main.c_oflag |= OPOST; /* Enable output postprocessing */
550 s.main.c_oflag &= ~ONLCR; /* Disable map of NL to CR-NL on output */
551 #ifdef NLDLY
552 s.main.c_oflag &= ~(NLDLY|CRDLY|TABDLY|BSDLY|VTDLY|FFDLY);
553 /* No output delays */
554 #endif
555 s.main.c_lflag &= ~ECHO; /* Disable echo */
556 s.main.c_lflag |= ISIG; /* Enable signals */
557 #ifdef IUCLC
558 s.main.c_iflag &= ~IUCLC; /* Disable downcasing on input. */
559 #endif
560 #ifdef ISTRIP
561 s.main.c_iflag &= ~ISTRIP; /* don't strip 8th bit on input */
562 #endif
563 #ifdef OLCUC
564 s.main.c_oflag &= ~OLCUC; /* Disable upcasing on output. */
565 #endif
566 s.main.c_oflag &= ~TAB3; /* Disable tab expansion */
567 s.main.c_cflag = (s.main.c_cflag & ~CSIZE) | CS8; /* Don't strip 8th bit */
568 #if 0
569 /* Said to be unnecessary: */
570 s.main.c_cc[VMIN] = 1; /* minimum number of characters to accept */
571 s.main.c_cc[VTIME] = 0; /* wait forever for at least 1 character */
572 #endif
573
574 s.main.c_lflag |= ICANON; /* Enable erase/kill and eof processing */
575 s.main.c_cc[VEOF] = 04; /* insure that EOF is Control-D */
576 s.main.c_cc[VERASE] = CDISABLE; /* disable erase processing */
577 s.main.c_cc[VKILL] = CDISABLE; /* disable kill processing */
578
579 #ifdef HPUX
580 s.main.c_cflag = (s.main.c_cflag & ~CBAUD) | B9600; /* baud rate sanity */
581 #endif /* HPUX */
582
583 #ifdef AIX
584 /* AIX enhanced edit loses NULs, so disable it */
585 #ifndef IBMR2AIX
586 s.main.c_line = 0;
587 s.main.c_iflag &= ~ASCEDIT;
588 #endif
589 /* Also, PTY overloads NUL and BREAK.
590 don't ignore break, but don't signal either, so it looks like NUL. */
591 s.main.c_iflag &= ~IGNBRK;
592 s.main.c_iflag &= ~BRKINT;
593 /* QUIT and INTR work better as signals, so disable character forms */
594 s.main.c_cc[VINTR] = 0377;
595 #ifdef SIGNALS_VIA_CHARACTERS
596 /* the QUIT and INTR character are used in process_send_signal
597 so set them here to something useful. */
598 if (s.main.c_cc[VQUIT] == 0377)
599 s.main.c_cc[VQUIT] = '\\'&037; /* Control-\ */
600 if (s.main.c_cc[VINTR] == 0377)
601 s.main.c_cc[VINTR] = 'C'&037; /* Control-C */
602 #else /* no TIOCGPGRP or no TIOCGLTC or no TIOCGETC */
603 /* QUIT and INTR work better as signals, so disable character forms */
604 s.main.c_cc[VQUIT] = 0377;
605 s.main.c_cc[VINTR] = 0377;
606 s.main.c_lflag &= ~ISIG;
607 #endif /* no TIOCGPGRP or no TIOCGLTC or no TIOCGETC */
608 s.main.c_cc[VEOL] = 0377;
609 s.main.c_cflag = (s.main.c_cflag & ~CBAUD) | B9600; /* baud rate sanity */
610 #endif /* AIX */
611
612 #else /* not HAVE_TERMIO */
613
614 s.main.sg_flags &= ~(ECHO | CRMOD | ANYP | ALLDELAY | RAW | LCASE
615 | CBREAK | TANDEM);
616 s.main.sg_flags |= LPASS8;
617 s.main.sg_erase = 0377;
618 s.main.sg_kill = 0377;
619 s.lmode = LLITOUT | s.lmode; /* Don't strip 8th bit */
620
621 #endif /* not HAVE_TERMIO */
622
623 EMACS_SET_TTY (out, &s, 0);
624
625 #ifdef BSD4_1
626 if (interrupt_input)
627 reset_sigio ();
628 #endif /* BSD4_1 */
629 #ifdef RTU
630 {
631 int zero = 0;
632 ioctl (out, FIOASYNC, &zero);
633 }
634 #endif /* RTU */
635 #endif /* not DOS_NT */
636 }
637 #endif /* not VMS */
638
639 #endif /* subprocesses */
640 \f
641 /* Record a signal code and the handler for it. */
642 struct save_signal
643 {
644 int code;
645 SIGTYPE (*handler) P_ ((int));
646 };
647
648 static void save_signal_handlers P_ ((struct save_signal *));
649 static void restore_signal_handlers P_ ((struct save_signal *));
650
651 /* Suspend the Emacs process; give terminal to its superior. */
652
653 void
654 sys_suspend ()
655 {
656 #ifdef VMS
657 /* "Foster" parentage allows emacs to return to a subprocess that attached
658 to the current emacs as a cheaper than starting a whole new process. This
659 is set up by KEPTEDITOR.COM. */
660 unsigned long parent_id, foster_parent_id;
661 char *fpid_string;
662
663 fpid_string = getenv ("EMACS_PARENT_PID");
664 if (fpid_string != NULL)
665 {
666 sscanf (fpid_string, "%x", &foster_parent_id);
667 if (foster_parent_id != 0)
668 parent_id = foster_parent_id;
669 else
670 parent_id = getppid ();
671 }
672 else
673 parent_id = getppid ();
674
675 xfree (fpid_string); /* On VMS, this was malloc'd */
676
677 if (parent_id && parent_id != 0xffffffff)
678 {
679 SIGTYPE (*oldsig)() = (int) signal (SIGINT, SIG_IGN);
680 int status = LIB$ATTACH (&parent_id) & 1;
681 signal (SIGINT, oldsig);
682 return status;
683 }
684 else
685 {
686 struct {
687 int l;
688 char *a;
689 } d_prompt;
690 d_prompt.l = sizeof ("Emacs: "); /* Our special prompt */
691 d_prompt.a = "Emacs: "; /* Just a reminder */
692 LIB$SPAWN (0, 0, 0, 0, 0, 0, 0, 0, 0, 0, &d_prompt, 0);
693 return 1;
694 }
695 return -1;
696 #else
697 #if defined(SIGTSTP) && !defined(MSDOS)
698
699 {
700 int pgrp = EMACS_GETPGRP (0);
701 EMACS_KILLPG (pgrp, SIGTSTP);
702 }
703
704 #else /* No SIGTSTP */
705 #ifdef USG_JOBCTRL /* If you don't know what this is don't mess with it */
706 ptrace (0, 0, 0, 0); /* set for ptrace - caught by csh */
707 kill (getpid (), SIGQUIT);
708
709 #else /* No SIGTSTP or USG_JOBCTRL */
710
711 /* On a system where suspending is not implemented,
712 instead fork a subshell and let it talk directly to the terminal
713 while we wait. */
714 sys_subshell ();
715
716 #endif /* no USG_JOBCTRL */
717 #endif /* no SIGTSTP */
718 #endif /* not VMS */
719 }
720
721 /* Fork a subshell. */
722
723 void
724 sys_subshell ()
725 {
726 #ifndef VMS
727 #ifdef DOS_NT /* Demacs 1.1.2 91/10/20 Manabu Higashida */
728 int st;
729 char oldwd[MAXPATHLEN+1]; /* Fixed length is safe on MSDOS. */
730 #endif
731 int pid;
732 struct save_signal saved_handlers[5];
733 Lisp_Object dir;
734 unsigned char *str = 0;
735 int len;
736
737 saved_handlers[0].code = SIGINT;
738 saved_handlers[1].code = SIGQUIT;
739 saved_handlers[2].code = SIGTERM;
740 #ifdef SIGIO
741 saved_handlers[3].code = SIGIO;
742 saved_handlers[4].code = 0;
743 #else
744 saved_handlers[3].code = 0;
745 #endif
746
747 /* Mentioning current_buffer->buffer would mean including buffer.h,
748 which somehow wedges the hp compiler. So instead... */
749
750 dir = intern ("default-directory");
751 if (NILP (Fboundp (dir)))
752 goto xyzzy;
753 dir = Fsymbol_value (dir);
754 if (!STRINGP (dir))
755 goto xyzzy;
756
757 dir = expand_and_dir_to_file (Funhandled_file_name_directory (dir), Qnil);
758 str = (unsigned char *) alloca (XSTRING (dir)->size + 2);
759 len = XSTRING (dir)->size;
760 bcopy (XSTRING (dir)->data, str, len);
761 if (str[len - 1] != '/') str[len++] = '/';
762 str[len] = 0;
763 xyzzy:
764
765 #ifdef DOS_NT
766 pid = 0;
767 #if __DJGPP__ > 1
768 save_signal_handlers (saved_handlers);
769 synch_process_alive = 1;
770 #endif /* __DJGPP__ > 1 */
771 #else
772 pid = vfork ();
773 if (pid == -1)
774 error ("Can't spawn subshell");
775 #endif
776
777 if (pid == 0)
778 {
779 char *sh = 0;
780
781 #ifdef DOS_NT /* MW, Aug 1993 */
782 getwd (oldwd);
783 if (sh == 0)
784 sh = (char *) egetenv ("SUSPEND"); /* KFS, 1994-12-14 */
785 #endif
786 if (sh == 0)
787 sh = (char *) egetenv ("SHELL");
788 if (sh == 0)
789 sh = "sh";
790
791 /* Use our buffer's default directory for the subshell. */
792 if (str)
793 chdir (str);
794
795 #ifdef subprocesses
796 close_process_descs (); /* Close Emacs's pipes/ptys */
797 #endif
798
799 #ifdef SET_EMACS_PRIORITY
800 {
801 extern int emacs_priority;
802
803 if (emacs_priority < 0)
804 nice (-emacs_priority);
805 }
806 #endif
807
808 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */
809 st = system (sh);
810 chdir (oldwd);
811 #if 0 /* This is also reported if last command executed in subshell failed, KFS */
812 if (st)
813 report_file_error ("Can't execute subshell", Fcons (build_string (sh), Qnil));
814 #endif
815 #else /* not MSDOS */
816 #ifdef WINDOWSNT
817 /* Waits for process completion */
818 pid = _spawnlp (_P_WAIT, sh, sh, NULL);
819 chdir (oldwd);
820 if (pid == -1)
821 write (1, "Can't execute subshell", 22);
822 #else /* not WINDOWSNT */
823 execlp (sh, sh, 0);
824 write (1, "Can't execute subshell", 22);
825 _exit (1);
826 #endif /* not WINDOWSNT */
827 #endif /* not MSDOS */
828 }
829
830 /* Do this now if we did not do it before. */
831 #if !defined (MSDOS) || __DJGPP__ == 1
832 save_signal_handlers (saved_handlers);
833 synch_process_alive = 1;
834 #endif
835
836 #ifndef DOS_NT
837 wait_for_termination (pid);
838 #endif
839 restore_signal_handlers (saved_handlers);
840 synch_process_alive = 0;
841 #endif /* !VMS */
842 }
843
844 static void
845 save_signal_handlers (saved_handlers)
846 struct save_signal *saved_handlers;
847 {
848 while (saved_handlers->code)
849 {
850 saved_handlers->handler
851 = (SIGTYPE (*) P_ ((int))) signal (saved_handlers->code, SIG_IGN);
852 saved_handlers++;
853 }
854 }
855
856 static void
857 restore_signal_handlers (saved_handlers)
858 struct save_signal *saved_handlers;
859 {
860 while (saved_handlers->code)
861 {
862 signal (saved_handlers->code, saved_handlers->handler);
863 saved_handlers++;
864 }
865 }
866 \f
867 #ifdef F_SETFL
868
869 int old_fcntl_flags;
870
871 void
872 init_sigio (fd)
873 int fd;
874 {
875 #ifdef FASYNC
876 old_fcntl_flags = fcntl (fd, F_GETFL, 0) & ~FASYNC;
877 fcntl (fd, F_SETFL, old_fcntl_flags | FASYNC);
878 #endif
879 interrupts_deferred = 0;
880 }
881
882 void
883 reset_sigio ()
884 {
885 unrequest_sigio ();
886 }
887
888 #ifdef FASYNC /* F_SETFL does not imply existence of FASYNC */
889
890 void
891 request_sigio ()
892 {
893 if (read_socket_hook)
894 return;
895
896 #ifdef SIGWINCH
897 sigunblock (sigmask (SIGWINCH));
898 #endif
899 fcntl (input_fd, F_SETFL, old_fcntl_flags | FASYNC);
900
901 interrupts_deferred = 0;
902 }
903
904 void
905 unrequest_sigio ()
906 {
907 if (read_socket_hook)
908 return;
909
910 #ifdef SIGWINCH
911 sigblock (sigmask (SIGWINCH));
912 #endif
913 fcntl (input_fd, F_SETFL, old_fcntl_flags);
914 interrupts_deferred = 1;
915 }
916
917 #else /* no FASYNC */
918 #ifdef STRIDE /* Stride doesn't have FASYNC - use FIOASYNC */
919
920 void
921 request_sigio ()
922 {
923 int on = 1;
924
925 if (read_socket_hook)
926 return;
927
928 ioctl (input_fd, FIOASYNC, &on);
929 interrupts_deferred = 0;
930 }
931
932 void
933 unrequest_sigio ()
934 {
935 int off = 0;
936
937 if (read_socket_hook)
938 return;
939
940 ioctl (input_fd, FIOASYNC, &off);
941 interrupts_deferred = 1;
942 }
943
944 #else /* not FASYNC, not STRIDE */
945
946 #ifdef _CX_UX
947
948 #include <termios.h>
949
950 void
951 request_sigio ()
952 {
953 int on = 1;
954 sigset_t st;
955
956 if (read_socket_hook)
957 return;
958
959 sigemptyset(&st);
960 sigaddset(&st, SIGIO);
961 ioctl (input_fd, FIOASYNC, &on);
962 interrupts_deferred = 0;
963 sigprocmask(SIG_UNBLOCK, &st, (sigset_t *)0);
964 }
965
966 void
967 unrequest_sigio ()
968 {
969 int off = 0;
970
971 if (read_socket_hook)
972 return;
973
974 ioctl (input_fd, FIOASYNC, &off);
975 interrupts_deferred = 1;
976 }
977
978 #else /* ! _CX_UX */
979
980 void
981 request_sigio ()
982 {
983 if (read_socket_hook)
984 return;
985
986 croak ("request_sigio");
987 }
988
989 void
990 unrequest_sigio ()
991 {
992 if (read_socket_hook)
993 return;
994
995 croak ("unrequest_sigio");
996 }
997
998 #endif /* _CX_UX */
999 #endif /* STRIDE */
1000 #endif /* FASYNC */
1001 #endif /* F_SETFL */
1002 \f
1003 /* Saving and restoring the process group of Emacs's terminal. */
1004
1005 #ifdef BSD_PGRPS
1006
1007 /* The process group of which Emacs was a member when it initially
1008 started.
1009
1010 If Emacs was in its own process group (i.e. inherited_pgroup ==
1011 getpid ()), then we know we're running under a shell with job
1012 control (Emacs would never be run as part of a pipeline).
1013 Everything is fine.
1014
1015 If Emacs was not in its own process group, then we know we're
1016 running under a shell (or a caller) that doesn't know how to
1017 separate itself from Emacs (like sh). Emacs must be in its own
1018 process group in order to receive SIGIO correctly. In this
1019 situation, we put ourselves in our own pgroup, forcibly set the
1020 tty's pgroup to our pgroup, and make sure to restore and reinstate
1021 the tty's pgroup just like any other terminal setting. If
1022 inherited_group was not the tty's pgroup, then we'll get a
1023 SIGTTmumble when we try to change the tty's pgroup, and a CONT if
1024 it goes foreground in the future, which is what should happen. */
1025 int inherited_pgroup;
1026
1027 /* Split off the foreground process group to Emacs alone.
1028 When we are in the foreground, but not started in our own process
1029 group, redirect the TTY to point to our own process group. We need
1030 to be in our own process group to receive SIGIO properly. */
1031 narrow_foreground_group ()
1032 {
1033 int me = getpid ();
1034
1035 setpgrp (0, inherited_pgroup);
1036 if (inherited_pgroup != me)
1037 EMACS_SET_TTY_PGRP (input_fd, &me);
1038 setpgrp (0, me);
1039 }
1040
1041 /* Set the tty to our original foreground group. */
1042 widen_foreground_group ()
1043 {
1044 if (inherited_pgroup != getpid ())
1045 EMACS_SET_TTY_PGRP (input_fd, &inherited_pgroup);
1046 setpgrp (0, inherited_pgroup);
1047 }
1048
1049 #endif /* BSD_PGRPS */
1050 \f
1051 /* Getting and setting emacs_tty structures. */
1052
1053 /* Set *TC to the parameters associated with the terminal FD.
1054 Return zero if all's well, or -1 if we ran into an error we
1055 couldn't deal with. */
1056 int
1057 emacs_get_tty (fd, settings)
1058 int fd;
1059 struct emacs_tty *settings;
1060 {
1061 /* Retrieve the primary parameters - baud rate, character size, etcetera. */
1062 #ifdef HAVE_TCATTR
1063 /* We have those nifty POSIX tcmumbleattr functions. */
1064 if (tcgetattr (fd, &settings->main) < 0)
1065 return -1;
1066
1067 #else
1068 #ifdef HAVE_TERMIO
1069 /* The SYSV-style interface? */
1070 if (ioctl (fd, TCGETA, &settings->main) < 0)
1071 return -1;
1072
1073 #else
1074 #ifdef VMS
1075 /* Vehemently Monstrous System? :-) */
1076 if (! (SYS$QIOW (0, fd, IO$_SENSEMODE, settings, 0, 0,
1077 &settings->main.class, 12, 0, 0, 0, 0)
1078 & 1))
1079 return -1;
1080
1081 #else
1082 #ifndef DOS_NT
1083 /* I give up - I hope you have the BSD ioctls. */
1084 if (ioctl (fd, TIOCGETP, &settings->main) < 0)
1085 return -1;
1086 #endif /* not DOS_NT */
1087 #endif
1088 #endif
1089 #endif
1090
1091 /* Suivant - Do we have to get struct ltchars data? */
1092 #ifdef HAVE_LTCHARS
1093 if (ioctl (fd, TIOCGLTC, &settings->ltchars) < 0)
1094 return -1;
1095 #endif
1096
1097 /* How about a struct tchars and a wordful of lmode bits? */
1098 #ifdef HAVE_TCHARS
1099 if (ioctl (fd, TIOCGETC, &settings->tchars) < 0
1100 || ioctl (fd, TIOCLGET, &settings->lmode) < 0)
1101 return -1;
1102 #endif
1103
1104 /* We have survived the tempest. */
1105 return 0;
1106 }
1107
1108
1109 /* Set the parameters of the tty on FD according to the contents of
1110 *SETTINGS. If FLUSHP is non-zero, we discard input.
1111 Return 0 if all went well, and -1 if anything failed. */
1112
1113 int
1114 emacs_set_tty (fd, settings, flushp)
1115 int fd;
1116 struct emacs_tty *settings;
1117 int flushp;
1118 {
1119 /* Set the primary parameters - baud rate, character size, etcetera. */
1120 #ifdef HAVE_TCATTR
1121 int i;
1122 /* We have those nifty POSIX tcmumbleattr functions.
1123 William J. Smith <wjs@wiis.wang.com> writes:
1124 "POSIX 1003.1 defines tcsetattr() to return success if it was
1125 able to perform any of the requested actions, even if some
1126 of the requested actions could not be performed.
1127 We must read settings back to ensure tty setup properly.
1128 AIX requires this to keep tty from hanging occasionally." */
1129 /* This make sure that we don't loop indefinitely in here. */
1130 for (i = 0 ; i < 10 ; i++)
1131 if (tcsetattr (fd, flushp ? TCSAFLUSH : TCSADRAIN, &settings->main) < 0)
1132 {
1133 if (errno == EINTR)
1134 continue;
1135 else
1136 return -1;
1137 }
1138 else
1139 {
1140 struct termios new;
1141
1142 /* Get the current settings, and see if they're what we asked for. */
1143 tcgetattr (fd, &new);
1144 /* We cannot use memcmp on the whole structure here because under
1145 * aix386 the termios structure has some reserved field that may
1146 * not be filled in.
1147 */
1148 if ( new.c_iflag == settings->main.c_iflag
1149 && new.c_oflag == settings->main.c_oflag
1150 && new.c_cflag == settings->main.c_cflag
1151 && new.c_lflag == settings->main.c_lflag
1152 && memcmp(new.c_cc, settings->main.c_cc, NCCS) == 0)
1153 break;
1154 else
1155 continue;
1156 }
1157
1158 #else
1159 #ifdef HAVE_TERMIO
1160 /* The SYSV-style interface? */
1161 if (ioctl (fd, flushp ? TCSETAF : TCSETAW, &settings->main) < 0)
1162 return -1;
1163
1164 #else
1165 #ifdef VMS
1166 /* Vehemently Monstrous System? :-) */
1167 if (! (SYS$QIOW (0, fd, IO$_SETMODE, &input_iosb, 0, 0,
1168 &settings->main.class, 12, 0, 0, 0, 0)
1169 & 1))
1170 return -1;
1171
1172 #else
1173 #ifndef DOS_NT
1174 /* I give up - I hope you have the BSD ioctls. */
1175 if (ioctl (fd, (flushp) ? TIOCSETP : TIOCSETN, &settings->main) < 0)
1176 return -1;
1177 #endif /* not DOS_NT */
1178
1179 #endif
1180 #endif
1181 #endif
1182
1183 /* Suivant - Do we have to get struct ltchars data? */
1184 #ifdef HAVE_LTCHARS
1185 if (ioctl (fd, TIOCSLTC, &settings->ltchars) < 0)
1186 return -1;
1187 #endif
1188
1189 /* How about a struct tchars and a wordful of lmode bits? */
1190 #ifdef HAVE_TCHARS
1191 if (ioctl (fd, TIOCSETC, &settings->tchars) < 0
1192 || ioctl (fd, TIOCLSET, &settings->lmode) < 0)
1193 return -1;
1194 #endif
1195
1196 /* We have survived the tempest. */
1197 return 0;
1198 }
1199
1200 \f
1201 /* The initial tty mode bits */
1202 struct emacs_tty old_tty;
1203
1204 /* 1 if we have been through init_sys_modes. */
1205 int term_initted;
1206
1207 /* 1 if outer tty status has been recorded. */
1208 int old_tty_valid;
1209
1210 #ifdef BSD4_1
1211 /* BSD 4.1 needs to keep track of the lmode bits in order to start
1212 sigio. */
1213 int lmode;
1214 #endif
1215
1216 #ifndef F_SETOWN_BUG
1217 #ifdef F_SETOWN
1218 int old_fcntl_owner;
1219 #endif /* F_SETOWN */
1220 #endif /* F_SETOWN_BUG */
1221
1222 /* This may also be defined in stdio,
1223 but if so, this does no harm,
1224 and using the same name avoids wasting the other one's space. */
1225
1226 #if defined (USG) || defined (DGUX)
1227 unsigned char _sobuf[BUFSIZ+8];
1228 #else
1229 char _sobuf[BUFSIZ];
1230 #endif
1231
1232 #ifdef HAVE_LTCHARS
1233 static struct ltchars new_ltchars = {-1,-1,-1,-1,-1,-1};
1234 #endif
1235 #ifdef HAVE_TCHARS
1236 static struct tchars new_tchars = {-1,-1,-1,-1,-1,-1};
1237 #endif
1238
1239 void
1240 init_sys_modes ()
1241 {
1242 struct emacs_tty tty;
1243
1244 #ifdef VMS
1245 #if 0
1246 static int oob_chars[2] = {0, 1 << 7}; /* catch C-g's */
1247 extern int (*interrupt_signal) ();
1248 #endif
1249 #endif
1250
1251 Vtty_erase_char = Qnil;
1252
1253 if (noninteractive)
1254 return;
1255
1256 #ifdef VMS
1257 if (!input_ef)
1258 input_ef = get_kbd_event_flag ();
1259 /* LIB$GET_EF (&input_ef); */
1260 SYS$CLREF (input_ef);
1261 waiting_for_ast = 0;
1262 if (!timer_ef)
1263 timer_ef = get_timer_event_flag ();
1264 /* LIB$GET_EF (&timer_ef); */
1265 SYS$CLREF (timer_ef);
1266 #if 0
1267 if (!process_ef)
1268 {
1269 LIB$GET_EF (&process_ef);
1270 SYS$CLREF (process_ef);
1271 }
1272 if (input_ef / 32 != process_ef / 32)
1273 croak ("Input and process event flags in different clusters.");
1274 #endif
1275 if (input_ef / 32 != timer_ef / 32)
1276 croak ("Input and timer event flags in different clusters.");
1277 #if 0
1278 input_eflist = ((unsigned) 1 << (input_ef % 32)) |
1279 ((unsigned) 1 << (process_ef % 32));
1280 #endif
1281 timer_eflist = ((unsigned) 1 << (input_ef % 32)) |
1282 ((unsigned) 1 << (timer_ef % 32));
1283 #ifndef VMS4_4
1284 sys_access_reinit ();
1285 #endif
1286 #endif /* not VMS */
1287
1288 #ifdef BSD_PGRPS
1289 if (! read_socket_hook && EQ (Vwindow_system, Qnil))
1290 narrow_foreground_group ();
1291 #endif
1292
1293 #ifdef HAVE_WINDOW_SYSTEM
1294 /* Emacs' window system on MSDOG uses the `internal terminal' and therefore
1295 needs the initialization code below. */
1296 if (!read_socket_hook && EQ (Vwindow_system, Qnil))
1297 #endif
1298 {
1299 EMACS_GET_TTY (input_fd, &old_tty);
1300
1301 old_tty_valid = 1;
1302
1303 tty = old_tty;
1304
1305 #if defined (HAVE_TERMIO) || defined (HAVE_TERMIOS)
1306 XSETINT (Vtty_erase_char, old_tty.main.c_cc[VERASE]);
1307
1308 #ifdef DGUX
1309 /* This allows meta to be sent on 8th bit. */
1310 tty.main.c_iflag &= ~INPCK; /* don't check input for parity */
1311 #endif
1312 tty.main.c_iflag |= (IGNBRK); /* Ignore break condition */
1313 tty.main.c_iflag &= ~ICRNL; /* Disable map of CR to NL on input */
1314 #ifdef INLCR /* I'm just being cautious,
1315 since I can't check how widespread INLCR is--rms. */
1316 tty.main.c_iflag &= ~INLCR; /* Disable map of NL to CR on input */
1317 #endif
1318 #ifdef ISTRIP
1319 tty.main.c_iflag &= ~ISTRIP; /* don't strip 8th bit on input */
1320 #endif
1321 tty.main.c_lflag &= ~ECHO; /* Disable echo */
1322 tty.main.c_lflag &= ~ICANON; /* Disable erase/kill processing */
1323 #ifdef IEXTEN
1324 tty.main.c_lflag &= ~IEXTEN; /* Disable other editing characters. */
1325 #endif
1326 tty.main.c_lflag |= ISIG; /* Enable signals */
1327 if (flow_control)
1328 {
1329 tty.main.c_iflag |= IXON; /* Enable start/stop output control */
1330 #ifdef IXANY
1331 tty.main.c_iflag &= ~IXANY;
1332 #endif /* IXANY */
1333 }
1334 else
1335 tty.main.c_iflag &= ~IXON; /* Disable start/stop output control */
1336 tty.main.c_oflag &= ~ONLCR; /* Disable map of NL to CR-NL
1337 on output */
1338 tty.main.c_oflag &= ~TAB3; /* Disable tab expansion */
1339 #ifdef CS8
1340 if (meta_key)
1341 {
1342 tty.main.c_cflag |= CS8; /* allow 8th bit on input */
1343 tty.main.c_cflag &= ~PARENB;/* Don't check parity */
1344 }
1345 #endif
1346 tty.main.c_cc[VINTR] = quit_char; /* C-g (usually) gives SIGINT */
1347 /* Set up C-g for both SIGQUIT and SIGINT.
1348 We don't know which we will get, but we handle both alike
1349 so which one it really gives us does not matter. */
1350 tty.main.c_cc[VQUIT] = quit_char;
1351 tty.main.c_cc[VMIN] = 1; /* Input should wait for at least 1 char */
1352 tty.main.c_cc[VTIME] = 0; /* no matter how long that takes. */
1353 #ifdef VSWTCH
1354 tty.main.c_cc[VSWTCH] = CDISABLE; /* Turn off shell layering use
1355 of C-z */
1356 #endif /* VSWTCH */
1357
1358 #if defined (mips) || defined (HAVE_TCATTR)
1359 #ifdef VSUSP
1360 tty.main.c_cc[VSUSP] = CDISABLE; /* Turn off mips handling of C-z. */
1361 #endif /* VSUSP */
1362 #ifdef V_DSUSP
1363 tty.main.c_cc[V_DSUSP] = CDISABLE; /* Turn off mips handling of C-y. */
1364 #endif /* V_DSUSP */
1365 #ifdef VDSUSP /* Some systems have VDSUSP, some have V_DSUSP. */
1366 tty.main.c_cc[VDSUSP] = CDISABLE;
1367 #endif /* VDSUSP */
1368 #ifdef VLNEXT
1369 tty.main.c_cc[VLNEXT] = CDISABLE;
1370 #endif /* VLNEXT */
1371 #ifdef VREPRINT
1372 tty.main.c_cc[VREPRINT] = CDISABLE;
1373 #endif /* VREPRINT */
1374 #ifdef VWERASE
1375 tty.main.c_cc[VWERASE] = CDISABLE;
1376 #endif /* VWERASE */
1377 #ifdef VDISCARD
1378 tty.main.c_cc[VDISCARD] = CDISABLE;
1379 #endif /* VDISCARD */
1380
1381 if (flow_control)
1382 {
1383 #ifdef VSTART
1384 tty.main.c_cc[VSTART] = '\021';
1385 #endif /* VSTART */
1386 #ifdef VSTOP
1387 tty.main.c_cc[VSTOP] = '\023';
1388 #endif /* VSTOP */
1389 }
1390 else
1391 {
1392 #ifdef VSTART
1393 tty.main.c_cc[VSTART] = CDISABLE;
1394 #endif /* VSTART */
1395 #ifdef VSTOP
1396 tty.main.c_cc[VSTOP] = CDISABLE;
1397 #endif /* VSTOP */
1398 }
1399 #endif /* mips or HAVE_TCATTR */
1400
1401 #ifdef SET_LINE_DISCIPLINE
1402 /* Need to explicitly request TERMIODISC line discipline or
1403 Ultrix's termios does not work correctly. */
1404 tty.main.c_line = SET_LINE_DISCIPLINE;
1405 #endif
1406 #ifdef AIX
1407 #ifndef IBMR2AIX
1408 /* AIX enhanced edit loses NULs, so disable it. */
1409 tty.main.c_line = 0;
1410 tty.main.c_iflag &= ~ASCEDIT;
1411 #else
1412 tty.main.c_cc[VSTRT] = 255;
1413 tty.main.c_cc[VSTOP] = 255;
1414 tty.main.c_cc[VSUSP] = 255;
1415 tty.main.c_cc[VDSUSP] = 255;
1416 #endif /* IBMR2AIX */
1417 if (flow_control)
1418 {
1419 #ifdef VSTART
1420 tty.main.c_cc[VSTART] = '\021';
1421 #endif /* VSTART */
1422 #ifdef VSTOP
1423 tty.main.c_cc[VSTOP] = '\023';
1424 #endif /* VSTOP */
1425 }
1426 /* Also, PTY overloads NUL and BREAK.
1427 don't ignore break, but don't signal either, so it looks like NUL.
1428 This really serves a purpose only if running in an XTERM window
1429 or via TELNET or the like, but does no harm elsewhere. */
1430 tty.main.c_iflag &= ~IGNBRK;
1431 tty.main.c_iflag &= ~BRKINT;
1432 #endif
1433 #else /* if not HAVE_TERMIO */
1434 #ifdef VMS
1435 tty.main.tt_char |= TT$M_NOECHO;
1436 if (meta_key)
1437 tty.main.tt_char |= TT$M_EIGHTBIT;
1438 if (flow_control)
1439 tty.main.tt_char |= TT$M_TTSYNC;
1440 else
1441 tty.main.tt_char &= ~TT$M_TTSYNC;
1442 tty.main.tt2_char |= TT2$M_PASTHRU | TT2$M_XON;
1443 #else /* not VMS (BSD, that is) */
1444 #ifndef DOS_NT
1445 Vtty_erase_char = tty.main.sg_erase;
1446 tty.main.sg_flags &= ~(ECHO | CRMOD | XTABS);
1447 if (meta_key)
1448 tty.main.sg_flags |= ANYP;
1449 tty.main.sg_flags |= interrupt_input ? RAW : CBREAK;
1450 #endif /* not DOS_NT */
1451 #endif /* not VMS (BSD, that is) */
1452 #endif /* not HAVE_TERMIO */
1453
1454 /* If going to use CBREAK mode, we must request C-g to interrupt
1455 and turn off start and stop chars, etc. If not going to use
1456 CBREAK mode, do this anyway so as to turn off local flow
1457 control for user coming over network on 4.2; in this case,
1458 only t_stopc and t_startc really matter. */
1459 #ifndef HAVE_TERMIO
1460 #ifdef HAVE_TCHARS
1461 /* Note: if not using CBREAK mode, it makes no difference how we
1462 set this */
1463 tty.tchars = new_tchars;
1464 tty.tchars.t_intrc = quit_char;
1465 if (flow_control)
1466 {
1467 tty.tchars.t_startc = '\021';
1468 tty.tchars.t_stopc = '\023';
1469 }
1470
1471 tty.lmode = LDECCTQ | LLITOUT | LPASS8 | LNOFLSH | old_tty.lmode;
1472 #ifdef ultrix
1473 /* Under Ultrix 4.2a, leaving this out doesn't seem to hurt
1474 anything, and leaving it in breaks the meta key. Go figure. */
1475 tty.lmode &= ~LLITOUT;
1476 #endif
1477
1478 #ifdef BSD4_1
1479 lmode = tty.lmode;
1480 #endif
1481
1482 #endif /* HAVE_TCHARS */
1483 #endif /* not HAVE_TERMIO */
1484
1485 #ifdef HAVE_LTCHARS
1486 tty.ltchars = new_ltchars;
1487 #endif /* HAVE_LTCHARS */
1488 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida, MW Aug 1993 */
1489 if (!term_initted)
1490 internal_terminal_init ();
1491 dos_ttraw ();
1492 #endif
1493
1494 EMACS_SET_TTY (input_fd, &tty, 0);
1495
1496 /* This code added to insure that, if flow-control is not to be used,
1497 we have an unlocked terminal at the start. */
1498
1499 #ifdef TCXONC
1500 if (!flow_control) ioctl (input_fd, TCXONC, 1);
1501 #endif
1502 #ifndef APOLLO
1503 #ifdef TIOCSTART
1504 if (!flow_control) ioctl (input_fd, TIOCSTART, 0);
1505 #endif
1506 #endif
1507
1508 #if defined (HAVE_TERMIOS) || defined (HPUX9)
1509 #ifdef TCOON
1510 if (!flow_control) tcflow (input_fd, TCOON);
1511 #endif
1512 #endif
1513
1514 #ifdef AIXHFT
1515 hft_init ();
1516 #ifdef IBMR2AIX
1517 {
1518 /* IBM's HFT device usually thinks a ^J should be LF/CR. We need it
1519 to be only LF. This is the way that is done. */
1520 struct termio tty;
1521
1522 if (ioctl (1, HFTGETID, &tty) != -1)
1523 write (1, "\033[20l", 5);
1524 }
1525 #endif
1526 #endif /* AIXHFT */
1527
1528 #ifdef VMS
1529 /* Appears to do nothing when in PASTHRU mode.
1530 SYS$QIOW (0, input_fd, IO$_SETMODE|IO$M_OUTBAND, 0, 0, 0,
1531 interrupt_signal, oob_chars, 0, 0, 0, 0);
1532 */
1533 queue_kbd_input (0);
1534 #endif /* VMS */
1535 }
1536
1537 #ifdef F_SETFL
1538 #ifndef F_SETOWN_BUG
1539 #ifdef F_GETOWN /* F_SETFL does not imply existence of F_GETOWN */
1540 if (interrupt_input
1541 && ! read_socket_hook && EQ (Vwindow_system, Qnil))
1542 {
1543 old_fcntl_owner = fcntl (input_fd, F_GETOWN, 0);
1544 fcntl (input_fd, F_SETOWN, getpid ());
1545 init_sigio (input_fd);
1546 }
1547 #endif /* F_GETOWN */
1548 #endif /* F_SETOWN_BUG */
1549 #endif /* F_SETFL */
1550
1551 #ifdef BSD4_1
1552 if (interrupt_input)
1553 init_sigio (input_fd);
1554 #endif
1555
1556 #ifdef VMS /* VMS sometimes has this symbol but lacks setvbuf. */
1557 #undef _IOFBF
1558 #endif
1559 #ifdef _IOFBF
1560 /* This symbol is defined on recent USG systems.
1561 Someone says without this call USG won't really buffer the file
1562 even with a call to setbuf. */
1563 setvbuf (stdout, _sobuf, _IOFBF, sizeof _sobuf);
1564 #else
1565 setbuf (stdout, _sobuf);
1566 #endif
1567 #ifdef HAVE_WINDOW_SYSTEM
1568 /* Emacs' window system on MSDOG uses the `internal terminal' and therefore
1569 needs the initialization code below. */
1570 if (EQ (Vwindow_system, Qnil)
1571 #ifndef WINDOWSNT
1572 /* When running in tty mode on NT/Win95, we have a read_socket
1573 hook, but still need the rest of the initialization code below. */
1574 && (! read_socket_hook)
1575 #endif
1576 )
1577 #endif
1578 set_terminal_modes ();
1579
1580 if (term_initted && no_redraw_on_reenter)
1581 {
1582 if (display_completed)
1583 direct_output_forward_char (0);
1584 }
1585 else
1586 {
1587 frame_garbaged = 1;
1588 if (FRAMEP (Vterminal_frame))
1589 FRAME_GARBAGED_P (XFRAME (Vterminal_frame)) = 1;
1590 }
1591
1592 term_initted = 1;
1593 }
1594
1595 /* Return nonzero if safe to use tabs in output.
1596 At the time this is called, init_sys_modes has not been done yet. */
1597
1598 tabs_safe_p ()
1599 {
1600 struct emacs_tty tty;
1601
1602 EMACS_GET_TTY (input_fd, &tty);
1603 return EMACS_TTY_TABS_OK (&tty);
1604 }
1605 \f
1606 /* Get terminal size from system.
1607 Store number of lines into *HEIGHTP and width into *WIDTHP.
1608 We store 0 if there's no valid information. */
1609
1610 void
1611 get_frame_size (widthp, heightp)
1612 int *widthp, *heightp;
1613 {
1614
1615 #ifdef TIOCGWINSZ
1616
1617 /* BSD-style. */
1618 struct winsize size;
1619
1620 if (ioctl (input_fd, TIOCGWINSZ, &size) == -1)
1621 *widthp = *heightp = 0;
1622 else
1623 {
1624 *widthp = size.ws_col;
1625 *heightp = size.ws_row;
1626 }
1627
1628 #else
1629 #ifdef TIOCGSIZE
1630
1631 /* SunOS - style. */
1632 struct ttysize size;
1633
1634 if (ioctl (input_fd, TIOCGSIZE, &size) == -1)
1635 *widthp = *heightp = 0;
1636 else
1637 {
1638 *widthp = size.ts_cols;
1639 *heightp = size.ts_lines;
1640 }
1641
1642 #else
1643 #ifdef VMS
1644
1645 struct sensemode tty;
1646
1647 SYS$QIOW (0, input_fd, IO$_SENSEMODE, &tty, 0, 0,
1648 &tty.class, 12, 0, 0, 0, 0);
1649 *widthp = tty.scr_wid;
1650 *heightp = tty.scr_len;
1651
1652 #else
1653 #ifdef MSDOS
1654 *widthp = ScreenCols ();
1655 *heightp = ScreenRows ();
1656 #else /* system doesn't know size */
1657 *widthp = 0;
1658 *heightp = 0;
1659 #endif
1660
1661 #endif /* not VMS */
1662 #endif /* not SunOS-style */
1663 #endif /* not BSD-style */
1664 }
1665
1666 /* Set the logical window size associated with descriptor FD
1667 to HEIGHT and WIDTH. This is used mainly with ptys. */
1668
1669 int
1670 set_window_size (fd, height, width)
1671 int fd, height, width;
1672 {
1673 #ifdef TIOCSWINSZ
1674
1675 /* BSD-style. */
1676 struct winsize size;
1677 size.ws_row = height;
1678 size.ws_col = width;
1679
1680 if (ioctl (fd, TIOCSWINSZ, &size) == -1)
1681 return 0; /* error */
1682 else
1683 return 1;
1684
1685 #else
1686 #ifdef TIOCSSIZE
1687
1688 /* SunOS - style. */
1689 struct ttysize size;
1690 size.ts_lines = height;
1691 size.ts_cols = width;
1692
1693 if (ioctl (fd, TIOCGSIZE, &size) == -1)
1694 return 0;
1695 else
1696 return 1;
1697 #else
1698 return -1;
1699 #endif /* not SunOS-style */
1700 #endif /* not BSD-style */
1701 }
1702
1703 \f
1704 /* Prepare the terminal for exiting Emacs; move the cursor to the
1705 bottom of the frame, turn off interrupt-driven I/O, etc. */
1706 void
1707 reset_sys_modes ()
1708 {
1709 if (noninteractive)
1710 {
1711 fflush (stdout);
1712 return;
1713 }
1714 if (!term_initted)
1715 return;
1716 #ifdef HAVE_WINDOW_SYSTEM
1717 /* Emacs' window system on MSDOG uses the `internal terminal' and therefore
1718 needs the clean-up code below. */
1719 if (!EQ (Vwindow_system, Qnil)
1720 #ifndef WINDOWSNT
1721 /* When running in tty mode on NT/Win95, we have a read_socket
1722 hook, but still need the rest of the clean-up code below. */
1723 || read_socket_hook
1724 #endif
1725 )
1726 return;
1727 #endif
1728 cursor_to (FRAME_HEIGHT (selected_frame) - 1, 0);
1729 clear_end_of_line (FRAME_WIDTH (selected_frame));
1730 /* clear_end_of_line may move the cursor */
1731 cursor_to (FRAME_HEIGHT (selected_frame) - 1, 0);
1732 #if defined (IBMR2AIX) && defined (AIXHFT)
1733 {
1734 /* HFT devices normally use ^J as a LF/CR. We forced it to
1735 do the LF only. Now, we need to reset it. */
1736 struct termio tty;
1737
1738 if (ioctl (1, HFTGETID, &tty) != -1)
1739 write (1, "\033[20h", 5);
1740 }
1741 #endif
1742
1743 reset_terminal_modes ();
1744 fflush (stdout);
1745 #ifdef BSD_SYSTEM
1746 #ifndef BSD4_1
1747 /* Avoid possible loss of output when changing terminal modes. */
1748 fsync (fileno (stdout));
1749 #endif
1750 #endif
1751
1752 #ifdef F_SETFL
1753 #ifndef F_SETOWN_BUG
1754 #ifdef F_SETOWN /* F_SETFL does not imply existence of F_SETOWN */
1755 if (interrupt_input)
1756 {
1757 reset_sigio ();
1758 fcntl (input_fd, F_SETOWN, old_fcntl_owner);
1759 }
1760 #endif /* F_SETOWN */
1761 #endif /* F_SETOWN_BUG */
1762 #ifdef O_NDELAY
1763 fcntl (input_fd, F_SETFL, fcntl (input_fd, F_GETFL, 0) & ~O_NDELAY);
1764 #endif
1765 #endif /* F_SETFL */
1766 #ifdef BSD4_1
1767 if (interrupt_input)
1768 reset_sigio ();
1769 #endif /* BSD4_1 */
1770
1771 if (old_tty_valid)
1772 while (EMACS_SET_TTY (input_fd, &old_tty, 0) < 0 && errno == EINTR)
1773 ;
1774
1775 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */
1776 dos_ttcooked ();
1777 #endif
1778
1779 #ifdef SET_LINE_DISCIPLINE
1780 /* Ultrix's termios *ignores* any line discipline except TERMIODISC.
1781 A different old line discipline is therefore not restored, yet.
1782 Restore the old line discipline by hand. */
1783 ioctl (0, TIOCSETD, &old_tty.main.c_line);
1784 #endif
1785
1786 #ifdef AIXHFT
1787 hft_reset ();
1788 #endif
1789
1790 #ifdef BSD_PGRPS
1791 widen_foreground_group ();
1792 #endif
1793 }
1794 \f
1795 #ifdef HAVE_PTYS
1796
1797 /* Set up the proper status flags for use of a pty. */
1798
1799 void
1800 setup_pty (fd)
1801 int fd;
1802 {
1803 /* I'm told that TOICREMOTE does not mean control chars
1804 "can't be sent" but rather that they don't have
1805 input-editing or signaling effects.
1806 That should be good, because we have other ways
1807 to do those things in Emacs.
1808 However, telnet mode seems not to work on 4.2.
1809 So TIOCREMOTE is turned off now. */
1810
1811 /* Under hp-ux, if TIOCREMOTE is turned on, some calls
1812 will hang. In particular, the "timeout" feature (which
1813 causes a read to return if there is no data available)
1814 does this. Also it is known that telnet mode will hang
1815 in such a way that Emacs must be stopped (perhaps this
1816 is the same problem).
1817
1818 If TIOCREMOTE is turned off, then there is a bug in
1819 hp-ux which sometimes loses data. Apparently the
1820 code which blocks the master process when the internal
1821 buffer fills up does not work. Other than this,
1822 though, everything else seems to work fine.
1823
1824 Since the latter lossage is more benign, we may as well
1825 lose that way. -- cph */
1826 #ifdef FIONBIO
1827 #ifdef SYSV_PTYS
1828 {
1829 int on = 1;
1830 ioctl (fd, FIONBIO, &on);
1831 }
1832 #endif
1833 #endif
1834 #ifdef IBMRTAIX
1835 /* On AIX, the parent gets SIGHUP when a pty attached child dies. So, we */
1836 /* ignore SIGHUP once we've started a child on a pty. Note that this may */
1837 /* cause EMACS not to die when it should, i.e., when its own controlling */
1838 /* tty goes away. I've complained to the AIX developers, and they may */
1839 /* change this behavior, but I'm not going to hold my breath. */
1840 signal (SIGHUP, SIG_IGN);
1841 #endif
1842 }
1843 #endif /* HAVE_PTYS */
1844 \f
1845 #ifdef VMS
1846
1847 /* Assigning an input channel is done at the start of Emacs execution.
1848 This is called each time Emacs is resumed, also, but does nothing
1849 because input_chain is no longer zero. */
1850
1851 init_vms_input ()
1852 {
1853 int status;
1854
1855 if (input_fd == 0)
1856 {
1857 status = SYS$ASSIGN (&input_dsc, &input_fd, 0, 0);
1858 if (! (status & 1))
1859 LIB$STOP (status);
1860 }
1861 }
1862
1863 /* Deassigning the input channel is done before exiting. */
1864
1865 stop_vms_input ()
1866 {
1867 return SYS$DASSGN (input_fd);
1868 }
1869
1870 short input_buffer;
1871
1872 /* Request reading one character into the keyboard buffer.
1873 This is done as soon as the buffer becomes empty. */
1874
1875 queue_kbd_input ()
1876 {
1877 int status;
1878 extern kbd_input_ast ();
1879
1880 waiting_for_ast = 0;
1881 stop_input = 0;
1882 status = SYS$QIO (0, input_fd, IO$_READVBLK,
1883 &input_iosb, kbd_input_ast, 1,
1884 &input_buffer, 1, 0, terminator_mask, 0, 0);
1885 }
1886
1887 int input_count;
1888
1889 /* Ast routine that is called when keyboard input comes in
1890 in accord with the SYS$QIO above. */
1891
1892 kbd_input_ast ()
1893 {
1894 register int c = -1;
1895 int old_errno = errno;
1896 extern EMACS_TIME *input_available_clear_time;
1897
1898 if (waiting_for_ast)
1899 SYS$SETEF (input_ef);
1900 waiting_for_ast = 0;
1901 input_count++;
1902 #ifdef ASTDEBUG
1903 if (input_count == 25)
1904 exit (1);
1905 printf ("Ast # %d,", input_count);
1906 printf (" iosb = %x, %x, %x, %x",
1907 input_iosb.offset, input_iosb.status, input_iosb.termlen,
1908 input_iosb.term);
1909 #endif
1910 if (input_iosb.offset)
1911 {
1912 c = input_buffer;
1913 #ifdef ASTDEBUG
1914 printf (", char = 0%o", c);
1915 #endif
1916 }
1917 #ifdef ASTDEBUG
1918 printf ("\n");
1919 fflush (stdout);
1920 sleep (1);
1921 #endif
1922 if (! stop_input)
1923 queue_kbd_input ();
1924 if (c >= 0)
1925 {
1926 struct input_event e;
1927 e.kind = ascii_keystroke;
1928 XSETINT (e.code, c);
1929 XSETFRAME (e.frame_or_window, selected_frame);
1930 kbd_buffer_store_event (&e);
1931 }
1932 if (input_available_clear_time)
1933 EMACS_SET_SECS_USECS (*input_available_clear_time, 0, 0);
1934 errno = old_errno;
1935 }
1936
1937 /* Wait until there is something in kbd_buffer. */
1938
1939 wait_for_kbd_input ()
1940 {
1941 extern int have_process_input, process_exited;
1942
1943 /* If already something, avoid doing system calls. */
1944 if (detect_input_pending ())
1945 {
1946 return;
1947 }
1948 /* Clear a flag, and tell ast routine above to set it. */
1949 SYS$CLREF (input_ef);
1950 waiting_for_ast = 1;
1951 /* Check for timing error: ast happened while we were doing that. */
1952 if (!detect_input_pending ())
1953 {
1954 /* No timing error: wait for flag to be set. */
1955 set_waiting_for_input (0);
1956 SYS$WFLOR (input_ef, input_eflist);
1957 clear_waiting_for_input (0);
1958 if (!detect_input_pending ())
1959 /* Check for subprocess input availability */
1960 {
1961 int dsp = have_process_input || process_exited;
1962
1963 SYS$CLREF (process_ef);
1964 if (have_process_input)
1965 process_command_input ();
1966 if (process_exited)
1967 process_exit ();
1968 if (dsp)
1969 {
1970 update_mode_lines++;
1971 prepare_menu_bars ();
1972 redisplay_preserve_echo_area ();
1973 }
1974 }
1975 }
1976 waiting_for_ast = 0;
1977 }
1978
1979 /* Get rid of any pending QIO, when we are about to suspend
1980 or when we want to throw away pending input.
1981 We wait for a positive sign that the AST routine has run
1982 and therefore there is no I/O request queued when we return.
1983 SYS$SETAST is used to avoid a timing error. */
1984
1985 end_kbd_input ()
1986 {
1987 #ifdef ASTDEBUG
1988 printf ("At end_kbd_input.\n");
1989 fflush (stdout);
1990 sleep (1);
1991 #endif
1992 if (LIB$AST_IN_PROG ()) /* Don't wait if suspending from kbd_buffer_store_event! */
1993 {
1994 SYS$CANCEL (input_fd);
1995 return;
1996 }
1997
1998 SYS$SETAST (0);
1999 /* Clear a flag, and tell ast routine above to set it. */
2000 SYS$CLREF (input_ef);
2001 waiting_for_ast = 1;
2002 stop_input = 1;
2003 SYS$CANCEL (input_fd);
2004 SYS$SETAST (1);
2005 SYS$WAITFR (input_ef);
2006 waiting_for_ast = 0;
2007 }
2008
2009 /* Wait for either input available or time interval expiry. */
2010
2011 input_wait_timeout (timeval)
2012 int timeval; /* Time to wait, in seconds */
2013 {
2014 int time [2];
2015 static int zero = 0;
2016 static int large = -10000000;
2017
2018 LIB$EMUL (&timeval, &large, &zero, time); /* Convert to VMS format */
2019
2020 /* If already something, avoid doing system calls. */
2021 if (detect_input_pending ())
2022 {
2023 return;
2024 }
2025 /* Clear a flag, and tell ast routine above to set it. */
2026 SYS$CLREF (input_ef);
2027 waiting_for_ast = 1;
2028 /* Check for timing error: ast happened while we were doing that. */
2029 if (!detect_input_pending ())
2030 {
2031 /* No timing error: wait for flag to be set. */
2032 SYS$CANTIM (1, 0);
2033 if (SYS$SETIMR (timer_ef, time, 0, 1) & 1) /* Set timer */
2034 SYS$WFLOR (timer_ef, timer_eflist); /* Wait for timer expiry or input */
2035 }
2036 waiting_for_ast = 0;
2037 }
2038
2039 /* The standard `sleep' routine works some other way
2040 and it stops working if you have ever quit out of it.
2041 This one continues to work. */
2042
2043 sys_sleep (timeval)
2044 int timeval;
2045 {
2046 int time [2];
2047 static int zero = 0;
2048 static int large = -10000000;
2049
2050 LIB$EMUL (&timeval, &large, &zero, time); /* Convert to VMS format */
2051
2052 SYS$CANTIM (1, 0);
2053 if (SYS$SETIMR (timer_ef, time, 0, 1) & 1) /* Set timer */
2054 SYS$WAITFR (timer_ef); /* Wait for timer expiry only */
2055 }
2056
2057 void
2058 init_sigio (fd)
2059 int fd;
2060 {
2061 request_sigio ();
2062 }
2063
2064 reset_sigio ()
2065 {
2066 unrequest_sigio ();
2067 }
2068
2069 void
2070 request_sigio ()
2071 {
2072 croak ("request sigio");
2073 }
2074
2075 void
2076 unrequest_sigio ()
2077 {
2078 croak ("unrequest sigio");
2079 }
2080
2081 #endif /* VMS */
2082 \f
2083 /* Note that VMS compiler won't accept defined (CANNOT_DUMP). */
2084 #ifndef CANNOT_DUMP
2085 #define NEED_STARTS
2086 #endif
2087
2088 #ifndef SYSTEM_MALLOC
2089 #ifndef NEED_STARTS
2090 #define NEED_STARTS
2091 #endif
2092 #endif
2093
2094 #ifdef NEED_STARTS
2095 /* Some systems that cannot dump also cannot implement these. */
2096
2097 /*
2098 * Return the address of the start of the text segment prior to
2099 * doing an unexec. After unexec the return value is undefined.
2100 * See crt0.c for further explanation and _start.
2101 *
2102 */
2103
2104 #ifndef HAVE_TEXT_START
2105 char *
2106 start_of_text ()
2107 {
2108 #ifdef TEXT_START
2109 return ((char *) TEXT_START);
2110 #else
2111 #ifdef GOULD
2112 extern csrt ();
2113 return ((char *) csrt);
2114 #else /* not GOULD */
2115 extern int _start ();
2116 return ((char *) _start);
2117 #endif /* GOULD */
2118 #endif /* TEXT_START */
2119 }
2120 #endif /* not HAVE_TEXT_START */
2121
2122 /*
2123 * Return the address of the start of the data segment prior to
2124 * doing an unexec. After unexec the return value is undefined.
2125 * See crt0.c for further information and definition of data_start.
2126 *
2127 * Apparently, on BSD systems this is etext at startup. On
2128 * USG systems (swapping) this is highly mmu dependent and
2129 * is also dependent on whether or not the program is running
2130 * with shared text. Generally there is a (possibly large)
2131 * gap between end of text and start of data with shared text.
2132 *
2133 * On Uniplus+ systems with shared text, data starts at a
2134 * fixed address. Each port (from a given oem) is generally
2135 * different, and the specific value of the start of data can
2136 * be obtained via the UniPlus+ specific "uvar" system call,
2137 * however the method outlined in crt0.c seems to be more portable.
2138 *
2139 * Probably what will have to happen when a USG unexec is available,
2140 * at least on UniPlus, is temacs will have to be made unshared so
2141 * that text and data are contiguous. Then once loadup is complete,
2142 * unexec will produce a shared executable where the data can be
2143 * at the normal shared text boundary and the startofdata variable
2144 * will be patched by unexec to the correct value.
2145 *
2146 */
2147
2148 char *
2149 start_of_data ()
2150 {
2151 #ifdef DATA_START
2152 return ((char *) DATA_START);
2153 #else
2154 #ifdef ORDINARY_LINK
2155 /*
2156 * This is a hack. Since we're not linking crt0.c or pre_crt0.c,
2157 * data_start isn't defined. We take the address of environ, which
2158 * is known to live at or near the start of the system crt0.c, and
2159 * we don't sweat the handful of bytes that might lose.
2160 */
2161 extern char **environ;
2162
2163 return((char *) &environ);
2164 #else
2165 extern int data_start;
2166 return ((char *) &data_start);
2167 #endif /* ORDINARY_LINK */
2168 #endif /* DATA_START */
2169 }
2170 #endif /* NEED_STARTS (not CANNOT_DUMP or not SYSTEM_MALLOC) */
2171
2172 #ifndef CANNOT_DUMP
2173 /* Some systems that cannot dump also cannot implement these. */
2174
2175 /*
2176 * Return the address of the end of the text segment prior to
2177 * doing an unexec. After unexec the return value is undefined.
2178 */
2179
2180 char *
2181 end_of_text ()
2182 {
2183 #ifdef TEXT_END
2184 return ((char *) TEXT_END);
2185 #else
2186 extern int etext;
2187 return ((char *) &etext);
2188 #endif
2189 }
2190
2191 /*
2192 * Return the address of the end of the data segment prior to
2193 * doing an unexec. After unexec the return value is undefined.
2194 */
2195
2196 char *
2197 end_of_data ()
2198 {
2199 #ifdef DATA_END
2200 return ((char *) DATA_END);
2201 #else
2202 extern int edata;
2203 return ((char *) &edata);
2204 #endif
2205 }
2206
2207 #endif /* not CANNOT_DUMP */
2208 \f
2209 /* init_system_name sets up the string for the Lisp function
2210 system-name to return. */
2211
2212 #ifdef BSD4_1
2213 #include <whoami.h>
2214 #endif
2215
2216 extern Lisp_Object Vsystem_name;
2217
2218 #ifndef BSD4_1
2219 #ifndef VMS
2220 #ifdef HAVE_SOCKETS
2221 #include <sys/socket.h>
2222 #include <netdb.h>
2223 #endif /* HAVE_SOCKETS */
2224 #endif /* not VMS */
2225 #endif /* not BSD4_1 */
2226
2227 void
2228 init_system_name ()
2229 {
2230 #ifdef BSD4_1
2231 Vsystem_name = build_string (sysname);
2232 #else
2233 #ifdef VMS
2234 char *sp, *end;
2235 if ((sp = egetenv ("SYS$NODE")) == 0)
2236 Vsystem_name = build_string ("vax-vms");
2237 else if ((end = index (sp, ':')) == 0)
2238 Vsystem_name = build_string (sp);
2239 else
2240 Vsystem_name = make_string (sp, end - sp);
2241 #else
2242 #ifndef HAVE_GETHOSTNAME
2243 struct utsname uts;
2244 uname (&uts);
2245 Vsystem_name = build_string (uts.nodename);
2246 #else /* HAVE_GETHOSTNAME */
2247 unsigned int hostname_size = 256;
2248 char *hostname = (char *) alloca (hostname_size);
2249
2250 /* Try to get the host name; if the buffer is too short, try
2251 again. Apparently, the only indication gethostname gives of
2252 whether the buffer was large enough is the presence or absence
2253 of a '\0' in the string. Eech. */
2254 for (;;)
2255 {
2256 gethostname (hostname, hostname_size - 1);
2257 hostname[hostname_size - 1] = '\0';
2258
2259 /* Was the buffer large enough for the '\0'? */
2260 if (strlen (hostname) < hostname_size - 1)
2261 break;
2262
2263 hostname_size <<= 1;
2264 hostname = (char *) alloca (hostname_size);
2265 }
2266 #ifdef HAVE_SOCKETS
2267 /* Turn the hostname into the official, fully-qualified hostname.
2268 Don't do this if we're going to dump; this can confuse system
2269 libraries on some machines and make the dumped emacs core dump. */
2270 #ifndef CANNOT_DUMP
2271 if (initialized)
2272 #endif /* not CANNOT_DUMP */
2273 if (! index (hostname, '.'))
2274 {
2275 struct hostent *hp;
2276 int count;
2277 for (count = 0;; count++)
2278 {
2279 #ifdef TRY_AGAIN
2280 h_errno = 0;
2281 #endif
2282 hp = gethostbyname (hostname);
2283 #ifdef TRY_AGAIN
2284 if (! (hp == 0 && h_errno == TRY_AGAIN))
2285 #endif
2286 break;
2287 if (count >= 5)
2288 break;
2289 Fsleep_for (make_number (1), Qnil);
2290 }
2291 if (hp)
2292 {
2293 char *fqdn = (char *) hp->h_name;
2294 char *p;
2295
2296 if (!index (fqdn, '.'))
2297 {
2298 /* We still don't have a fully qualified domain name.
2299 Try to find one in the list of alternate names */
2300 char **alias = hp->h_aliases;
2301 while (*alias && !index (*alias, '.'))
2302 alias++;
2303 if (*alias)
2304 fqdn = *alias;
2305 }
2306 hostname = fqdn;
2307 #if 0
2308 /* Convert the host name to lower case. */
2309 /* Using ctype.h here would introduce a possible locale
2310 dependence that is probably wrong for hostnames. */
2311 p = hostname;
2312 while (*p)
2313 {
2314 if (*p >= 'A' && *p <= 'Z')
2315 *p += 'a' - 'A';
2316 p++;
2317 }
2318 #endif
2319 }
2320 }
2321 #endif /* HAVE_SOCKETS */
2322 /* We used to try using getdomainname here,
2323 but NIIBE Yutaka <gniibe@etl.go.jp> says that
2324 getdomainname gets the NIS/YP domain which often is not the same
2325 as in Internet domain name. */
2326 #if 0 /* Turned off because sysinfo is not really likely to return the
2327 correct Internet domain. */
2328 #if (HAVE_SYSINFO && defined (SI_SRPC_DOMAIN))
2329 if (! index (hostname, '.'))
2330 {
2331 /* The hostname is not fully qualified. Append the domain name. */
2332
2333 int hostlen = strlen (hostname);
2334 int domain_size = 256;
2335
2336 for (;;)
2337 {
2338 char *domain = (char *) alloca (domain_size + 1);
2339 char *fqdn = (char *) alloca (hostlen + 1 + domain_size + 1);
2340 int sys_domain_size = sysinfo (SI_SRPC_DOMAIN, domain, domain_size);
2341 if (sys_domain_size <= 0)
2342 break;
2343 if (domain_size < sys_domain_size)
2344 {
2345 domain_size = sys_domain_size;
2346 continue;
2347 }
2348 strcpy (fqdn, hostname);
2349 if (domain[0] == '.')
2350 strcpy (fqdn + hostlen, domain);
2351 else if (domain[0] != 0)
2352 {
2353 fqdn[hostlen] = '.';
2354 strcpy (fqdn + hostlen + 1, domain);
2355 }
2356 hostname = fqdn;
2357 break;
2358 }
2359 }
2360 #endif /* HAVE_SYSINFO && defined (SI_SRPC_DOMAIN) */
2361 #endif /* 0 */
2362 Vsystem_name = build_string (hostname);
2363 #endif /* HAVE_GETHOSTNAME */
2364 #endif /* VMS */
2365 #endif /* BSD4_1 */
2366 {
2367 unsigned char *p;
2368 for (p = XSTRING (Vsystem_name)->data; *p; p++)
2369 if (*p == ' ' || *p == '\t')
2370 *p = '-';
2371 }
2372 }
2373 \f
2374 #ifndef MSDOS
2375 #ifndef VMS
2376 #if !defined (HAVE_SELECT) || defined (BROKEN_SELECT_NON_X)
2377
2378 #include "sysselect.h"
2379 #undef select
2380
2381 #if defined (HAVE_X_WINDOWS) && !defined (HAVE_SELECT)
2382 /* Cause explanatory error message at compile time,
2383 since the select emulation is not good enough for X. */
2384 int *x = &x_windows_lose_if_no_select_system_call;
2385 #endif
2386
2387 /* Emulate as much as select as is possible under 4.1 and needed by Gnu Emacs
2388 * Only checks read descriptors.
2389 */
2390 /* How long to wait between checking fds in select */
2391 #define SELECT_PAUSE 1
2392 int select_alarmed;
2393
2394 /* For longjmp'ing back to read_input_waiting. */
2395
2396 jmp_buf read_alarm_throw;
2397
2398 /* Nonzero if the alarm signal should throw back to read_input_waiting.
2399 The read_socket_hook function sets this to 1 while it is waiting. */
2400
2401 int read_alarm_should_throw;
2402
2403 SIGTYPE
2404 select_alarm ()
2405 {
2406 select_alarmed = 1;
2407 #ifdef BSD4_1
2408 sigrelse (SIGALRM);
2409 #else /* not BSD4_1 */
2410 signal (SIGALRM, SIG_IGN);
2411 #endif /* not BSD4_1 */
2412 if (read_alarm_should_throw)
2413 longjmp (read_alarm_throw, 1);
2414 }
2415
2416 #ifndef WINDOWSNT
2417 /* Only rfds are checked. */
2418 int
2419 sys_select (nfds, rfds, wfds, efds, timeout)
2420 int nfds;
2421 SELECT_TYPE *rfds, *wfds, *efds;
2422 EMACS_TIME *timeout;
2423 {
2424 int ravail = 0, old_alarm;
2425 SELECT_TYPE orfds;
2426 int timeoutval;
2427 int *local_timeout;
2428 extern int proc_buffered_char[];
2429 #ifndef subprocesses
2430 int process_tick = 0, update_tick = 0;
2431 #else
2432 extern int process_tick, update_tick;
2433 #endif
2434 SIGTYPE (*old_trap) ();
2435 unsigned char buf;
2436
2437 #if defined (HAVE_SELECT) && defined (HAVE_X_WINDOWS)
2438 /* If we're using X, then the native select will work; we only need the
2439 emulation for non-X usage. */
2440 if (!NILP (Vwindow_system))
2441 return select (nfds, rfds, wfds, efds, timeout);
2442 #endif
2443 timeoutval = timeout ? EMACS_SECS (*timeout) : 100000;
2444 local_timeout = &timeoutval;
2445 FD_ZERO (&orfds);
2446 if (rfds)
2447 {
2448 orfds = *rfds;
2449 FD_ZERO (rfds);
2450 }
2451 if (wfds)
2452 FD_ZERO (wfds);
2453 if (efds)
2454 FD_ZERO (efds);
2455
2456 /* If we are looking only for the terminal, with no timeout,
2457 just read it and wait -- that's more efficient. */
2458 if (*local_timeout == 100000 && process_tick == update_tick
2459 && FD_ISSET (0, &orfds))
2460 {
2461 int fd;
2462 for (fd = 1; fd < nfds; ++fd)
2463 if (FD_ISSET (fd, &orfds))
2464 goto hardway;
2465 if (! detect_input_pending ())
2466 read_input_waiting ();
2467 FD_SET (0, rfds);
2468 return 1;
2469 }
2470
2471 hardway:
2472 /* Once a second, till the timer expires, check all the flagged read
2473 * descriptors to see if any input is available. If there is some then
2474 * set the corresponding bit in the return copy of rfds.
2475 */
2476 while (1)
2477 {
2478 register int to_check, fd;
2479
2480 if (rfds)
2481 {
2482 for (to_check = nfds, fd = 0; --to_check >= 0; fd++)
2483 {
2484 if (FD_ISSET (fd, &orfds))
2485 {
2486 int avail = 0, status = 0;
2487
2488 if (fd == 0)
2489 avail = detect_input_pending (); /* Special keyboard handler */
2490 else
2491 {
2492 #ifdef FIONREAD
2493 status = ioctl (fd, FIONREAD, &avail);
2494 #else /* no FIONREAD */
2495 /* Hoping it will return -1 if nothing available
2496 or 0 if all 0 chars requested are read. */
2497 if (proc_buffered_char[fd] >= 0)
2498 avail = 1;
2499 else
2500 {
2501 avail = read (fd, &buf, 1);
2502 if (avail > 0)
2503 proc_buffered_char[fd] = buf;
2504 }
2505 #endif /* no FIONREAD */
2506 }
2507 if (status >= 0 && avail > 0)
2508 {
2509 FD_SET (fd, rfds);
2510 ravail++;
2511 }
2512 }
2513 }
2514 }
2515 if (*local_timeout == 0 || ravail != 0 || process_tick != update_tick)
2516 break;
2517 old_alarm = alarm (0);
2518 old_trap = signal (SIGALRM, select_alarm);
2519 select_alarmed = 0;
2520 alarm (SELECT_PAUSE);
2521 /* Wait for a SIGALRM (or maybe a SIGTINT) */
2522 while (select_alarmed == 0 && *local_timeout != 0
2523 && process_tick == update_tick)
2524 {
2525 /* If we are interested in terminal input,
2526 wait by reading the terminal.
2527 That makes instant wakeup for terminal input at least. */
2528 if (FD_ISSET (0, &orfds))
2529 {
2530 read_input_waiting ();
2531 if (detect_input_pending ())
2532 select_alarmed = 1;
2533 }
2534 else
2535 pause ();
2536 }
2537 (*local_timeout) -= SELECT_PAUSE;
2538 /* Reset the old alarm if there was one */
2539 alarm (0);
2540 signal (SIGALRM, old_trap);
2541 if (old_alarm != 0)
2542 {
2543 /* Reset or forge an interrupt for the original handler. */
2544 old_alarm -= SELECT_PAUSE;
2545 if (old_alarm <= 0)
2546 kill (getpid (), SIGALRM); /* Fake an alarm with the orig' handler */
2547 else
2548 alarm (old_alarm);
2549 }
2550 if (*local_timeout == 0) /* Stop on timer being cleared */
2551 break;
2552 }
2553 return ravail;
2554 }
2555 #endif /* not WINDOWSNT */
2556
2557 /* Read keyboard input into the standard buffer,
2558 waiting for at least one character. */
2559
2560 /* Make all keyboard buffers much bigger when using a window system. */
2561 #ifdef HAVE_WINDOW_SYSTEM
2562 #define BUFFER_SIZE_FACTOR 16
2563 #else
2564 #define BUFFER_SIZE_FACTOR 1
2565 #endif
2566
2567 read_input_waiting ()
2568 {
2569 struct input_event e;
2570 int nread, i;
2571 extern int quit_char;
2572
2573 if (read_socket_hook)
2574 {
2575 struct input_event buf[256];
2576
2577 read_alarm_should_throw = 0;
2578 if (! setjmp (read_alarm_throw))
2579 nread = (*read_socket_hook) (0, buf, 256, 1, 0);
2580 else
2581 nread = -1;
2582
2583 /* Scan the chars for C-g and store them in kbd_buffer. */
2584 for (i = 0; i < nread; i++)
2585 {
2586 kbd_buffer_store_event (&buf[i]);
2587 /* Don't look at input that follows a C-g too closely.
2588 This reduces lossage due to autorepeat on C-g. */
2589 if (buf[i].kind == ascii_keystroke
2590 && buf[i].code == quit_char)
2591 break;
2592 }
2593 }
2594 else
2595 {
2596 char buf[3];
2597 nread = read (fileno (stdin), buf, 1);
2598
2599 /* Scan the chars for C-g and store them in kbd_buffer. */
2600 e.kind = ascii_keystroke;
2601 XSETFRAME (e.frame_or_window, selected_frame);
2602 e.modifiers = 0;
2603 for (i = 0; i < nread; i++)
2604 {
2605 /* Convert chars > 0177 to meta events if desired.
2606 We do this under the same conditions that read_avail_input does. */
2607 if (read_socket_hook == 0)
2608 {
2609 /* If the user says she has a meta key, then believe her. */
2610 if (meta_key == 1 && (buf[i] & 0x80))
2611 e.modifiers = meta_modifier;
2612 if (meta_key != 2)
2613 buf[i] &= ~0x80;
2614 }
2615
2616 XSETINT (e.code, buf[i]);
2617 kbd_buffer_store_event (&e);
2618 /* Don't look at input that follows a C-g too closely.
2619 This reduces lossage due to autorepeat on C-g. */
2620 if (buf[i] == quit_char)
2621 break;
2622 }
2623 }
2624 }
2625
2626 #endif /* not HAVE_SELECT */
2627 #endif /* not VMS */
2628 #endif /* not MSDOS */
2629 \f
2630 #ifdef BSD4_1
2631 /*
2632 * Partially emulate 4.2 open call.
2633 * open is defined as this in 4.1.
2634 *
2635 * - added by Michael Bloom @ Citicorp/TTI
2636 *
2637 */
2638
2639 int
2640 sys_open (path, oflag, mode)
2641 char *path;
2642 int oflag, mode;
2643 {
2644 if (oflag & O_CREAT)
2645 return creat (path, mode);
2646 else
2647 return open (path, oflag);
2648 }
2649
2650 void
2651 init_sigio (fd)
2652 int fd;
2653 {
2654 if (noninteractive)
2655 return;
2656 lmode = LINTRUP | lmode;
2657 ioctl (fd, TIOCLSET, &lmode);
2658 }
2659
2660 reset_sigio ()
2661 {
2662 if (noninteractive)
2663 return;
2664 lmode = ~LINTRUP & lmode;
2665 ioctl (0, TIOCLSET, &lmode);
2666 }
2667
2668 void
2669 request_sigio ()
2670 {
2671 sigrelse (SIGTINT);
2672
2673 interrupts_deferred = 0;
2674 }
2675
2676 void
2677 unrequest_sigio ()
2678 {
2679 sighold (SIGTINT);
2680
2681 interrupts_deferred = 1;
2682 }
2683
2684 /* still inside #ifdef BSD4_1 */
2685 #ifdef subprocesses
2686
2687 int sigheld; /* Mask of held signals */
2688
2689 sigholdx (signum)
2690 int signum;
2691 {
2692 sigheld |= sigbit (signum);
2693 sighold (signum);
2694 }
2695
2696 sigisheld (signum)
2697 int signum;
2698 {
2699 sigheld |= sigbit (signum);
2700 }
2701
2702 sigunhold (signum)
2703 int signum;
2704 {
2705 sigheld &= ~sigbit (signum);
2706 sigrelse (signum);
2707 }
2708
2709 sigfree () /* Free all held signals */
2710 {
2711 int i;
2712 for (i = 0; i < NSIG; i++)
2713 if (sigheld & sigbit (i))
2714 sigrelse (i);
2715 sigheld = 0;
2716 }
2717
2718 sigbit (i)
2719 {
2720 return 1 << (i - 1);
2721 }
2722 #endif /* subprocesses */
2723 #endif /* BSD4_1 */
2724 \f
2725 /* POSIX signals support - DJB */
2726 /* Anyone with POSIX signals should have ANSI C declarations */
2727
2728 #ifdef POSIX_SIGNALS
2729
2730 sigset_t old_mask, empty_mask, full_mask, temp_mask;
2731 static struct sigaction new_action, old_action;
2732
2733 init_signals ()
2734 {
2735 sigemptyset (&empty_mask);
2736 sigfillset (&full_mask);
2737 }
2738
2739 signal_handler_t
2740 sys_signal (int signal_number, signal_handler_t action)
2741 {
2742 sigemptyset (&new_action.sa_mask);
2743 new_action.sa_handler = (void (*)(int)) action;
2744 #ifdef SA_RESTART
2745 /* Emacs mostly works better with restartable system services. If this
2746 * flag exists, we probably want to turn it on here.
2747 */
2748 new_action.sa_flags = SA_RESTART;
2749 #else
2750 new_action.sa_flags = 0;
2751 #endif
2752 sigaction (signal_number, &new_action, &old_action);
2753 return ((void (*)(int)) old_action.sa_handler);
2754 }
2755
2756 #ifndef __GNUC__
2757 /* If we're compiling with GCC, we don't need this function, since it
2758 can be written as a macro. */
2759 sigset_t
2760 sys_sigmask (int sig)
2761 {
2762 sigset_t mask;
2763 sigemptyset (&mask);
2764 sigaddset (&mask, sig);
2765 return mask;
2766 }
2767 #endif
2768
2769 int
2770 sys_sigpause (sigset_t new_mask)
2771 {
2772 /* pause emulating berk sigpause... */
2773 sigsuspend (&new_mask);
2774 return (EINTR);
2775 }
2776
2777 /* I'd like to have these guys return pointers to the mask storage in here,
2778 but there'd be trouble if the code was saving multiple masks. I'll be
2779 safe and pass the structure. It normally won't be more than 2 bytes
2780 anyhow. - DJB */
2781
2782 sigset_t
2783 sys_sigblock (sigset_t new_mask)
2784 {
2785 sigset_t old_mask;
2786 sigprocmask (SIG_BLOCK, &new_mask, &old_mask);
2787 return (old_mask);
2788 }
2789
2790 sigset_t
2791 sys_sigunblock (sigset_t new_mask)
2792 {
2793 sigset_t old_mask;
2794 sigprocmask (SIG_UNBLOCK, &new_mask, &old_mask);
2795 return (old_mask);
2796 }
2797
2798 sigset_t
2799 sys_sigsetmask (sigset_t new_mask)
2800 {
2801 sigset_t old_mask;
2802 sigprocmask (SIG_SETMASK, &new_mask, &old_mask);
2803 return (old_mask);
2804 }
2805
2806 #endif /* POSIX_SIGNALS */
2807 \f
2808 #ifndef HAVE_RANDOM
2809 #ifdef random
2810 #define HAVE_RANDOM
2811 #endif
2812 #endif
2813
2814 /* Figure out how many bits the system's random number generator uses.
2815 `random' and `lrand48' are assumed to return 31 usable bits.
2816 BSD `rand' returns a 31 bit value but the low order bits are unusable;
2817 so we'll shift it and treat it like the 15-bit USG `rand'. */
2818
2819 #ifndef RAND_BITS
2820 # ifdef HAVE_RANDOM
2821 # define RAND_BITS 31
2822 # else /* !HAVE_RANDOM */
2823 # ifdef HAVE_LRAND48
2824 # define RAND_BITS 31
2825 # define random lrand48
2826 # else /* !HAVE_LRAND48 */
2827 # define RAND_BITS 15
2828 # if RAND_MAX == 32767
2829 # define random rand
2830 # else /* RAND_MAX != 32767 */
2831 # if RAND_MAX == 2147483647
2832 # define random() (rand () >> 16)
2833 # else /* RAND_MAX != 2147483647 */
2834 # ifdef USG
2835 # define random rand
2836 # else
2837 # define random() (rand () >> 16)
2838 # endif /* !USG */
2839 # endif /* RAND_MAX != 2147483647 */
2840 # endif /* RAND_MAX != 32767 */
2841 # endif /* !HAVE_LRAND48 */
2842 # endif /* !HAVE_RANDOM */
2843 #endif /* !RAND_BITS */
2844
2845 void
2846 seed_random (arg)
2847 long arg;
2848 {
2849 #ifdef HAVE_RANDOM
2850 srandom ((unsigned int)arg);
2851 #else
2852 # ifdef HAVE_LRAND48
2853 srand48 (arg);
2854 # else
2855 srand ((unsigned int)arg);
2856 # endif
2857 #endif
2858 }
2859
2860 /*
2861 * Build a full Emacs-sized word out of whatever we've got.
2862 * This suffices even for a 64-bit architecture with a 15-bit rand.
2863 */
2864 long
2865 get_random ()
2866 {
2867 long val = random ();
2868 #if VALBITS > RAND_BITS
2869 val = (val << RAND_BITS) ^ random ();
2870 #if VALBITS > 2*RAND_BITS
2871 val = (val << RAND_BITS) ^ random ();
2872 #if VALBITS > 3*RAND_BITS
2873 val = (val << RAND_BITS) ^ random ();
2874 #if VALBITS > 4*RAND_BITS
2875 val = (val << RAND_BITS) ^ random ();
2876 #endif /* need at least 5 */
2877 #endif /* need at least 4 */
2878 #endif /* need at least 3 */
2879 #endif /* need at least 2 */
2880 return val & ((1L << VALBITS) - 1);
2881 }
2882 \f
2883 #ifdef WRONG_NAME_INSQUE
2884
2885 insque (q,p)
2886 caddr_t q,p;
2887 {
2888 _insque (q,p);
2889 }
2890
2891 #endif
2892 \f
2893 #ifdef VMS
2894
2895 #ifdef getenv
2896 /* If any place else asks for the TERM variable,
2897 allow it to be overridden with the EMACS_TERM variable
2898 before attempting to translate the logical name TERM. As a last
2899 resort, ask for VAX C's special idea of the TERM variable. */
2900 #undef getenv
2901 char *
2902 sys_getenv (name)
2903 char *name;
2904 {
2905 register char *val;
2906 static char buf[256];
2907 static struct dsc$descriptor_s equiv
2908 = {sizeof (buf), DSC$K_DTYPE_T, DSC$K_CLASS_S, buf};
2909 static struct dsc$descriptor_s d_name
2910 = {0, DSC$K_DTYPE_T, DSC$K_CLASS_S, 0};
2911 short eqlen;
2912
2913 if (!strcmp (name, "TERM"))
2914 {
2915 val = (char *) getenv ("EMACS_TERM");
2916 if (val)
2917 return val;
2918 }
2919
2920 d_name.dsc$w_length = strlen (name);
2921 d_name.dsc$a_pointer = name;
2922 if (LIB$SYS_TRNLOG (&d_name, &eqlen, &equiv) == 1)
2923 {
2924 char *str = (char *) xmalloc (eqlen + 1);
2925 bcopy (buf, str, eqlen);
2926 str[eqlen] = '\0';
2927 /* This is a storage leak, but a pain to fix. With luck,
2928 no one will ever notice. */
2929 return str;
2930 }
2931 return (char *) getenv (name);
2932 }
2933 #endif /* getenv */
2934
2935 #ifdef abort
2936 /* Since VMS doesn't believe in core dumps, the only way to debug this beast is
2937 to force a call on the debugger from within the image. */
2938 #undef abort
2939 sys_abort ()
2940 {
2941 reset_sys_modes ();
2942 LIB$SIGNAL (SS$_DEBUG);
2943 }
2944 #endif /* abort */
2945 #endif /* VMS */
2946 \f
2947 #ifdef VMS
2948 #ifdef LINK_CRTL_SHARE
2949 #ifdef SHARABLE_LIB_BUG
2950 /* Variables declared noshare and initialized in sharable libraries
2951 cannot be shared. The VMS linker incorrectly forces you to use a private
2952 version which is uninitialized... If not for this "feature", we
2953 could use the C library definition of sys_nerr and sys_errlist. */
2954 int sys_nerr = 35;
2955 char *sys_errlist[] =
2956 {
2957 "error 0",
2958 "not owner",
2959 "no such file or directory",
2960 "no such process",
2961 "interrupted system call",
2962 "i/o error",
2963 "no such device or address",
2964 "argument list too long",
2965 "exec format error",
2966 "bad file number",
2967 "no child process",
2968 "no more processes",
2969 "not enough memory",
2970 "permission denied",
2971 "bad address",
2972 "block device required",
2973 "mount devices busy",
2974 "file exists",
2975 "cross-device link",
2976 "no such device",
2977 "not a directory",
2978 "is a directory",
2979 "invalid argument",
2980 "file table overflow",
2981 "too many open files",
2982 "not a typewriter",
2983 "text file busy",
2984 "file too big",
2985 "no space left on device",
2986 "illegal seek",
2987 "read-only file system",
2988 "too many links",
2989 "broken pipe",
2990 "math argument",
2991 "result too large",
2992 "I/O stream empty",
2993 "vax/vms specific error code nontranslatable error"
2994 };
2995 #endif /* SHARABLE_LIB_BUG */
2996 #endif /* LINK_CRTL_SHARE */
2997 #endif /* VMS */
2998
2999 #ifndef HAVE_STRERROR
3000 #ifndef WINDOWSNT
3001 char *
3002 strerror (errnum)
3003 int errnum;
3004 {
3005 extern char *sys_errlist[];
3006 extern int sys_nerr;
3007
3008 if (errnum >= 0 && errnum < sys_nerr)
3009 return sys_errlist[errnum];
3010 return (char *) "Unknown error";
3011 }
3012 #endif /* not WINDOWSNT */
3013 #endif /* ! HAVE_STRERROR */
3014 \f
3015 #ifdef INTERRUPTIBLE_OPEN
3016
3017 int
3018 /* VARARGS 2 */
3019 sys_open (path, oflag, mode)
3020 char *path;
3021 int oflag, mode;
3022 {
3023 register int rtnval;
3024
3025 while ((rtnval = open (path, oflag, mode)) == -1
3026 && (errno == EINTR));
3027 return (rtnval);
3028 }
3029
3030 #endif /* INTERRUPTIBLE_OPEN */
3031
3032 #ifdef INTERRUPTIBLE_CLOSE
3033
3034 sys_close (fd)
3035 int fd;
3036 {
3037 int did_retry = 0;
3038 register int rtnval;
3039
3040 while ((rtnval = close (fd)) == -1
3041 && (errno == EINTR))
3042 did_retry = 1;
3043
3044 /* If close is interrupted SunOS 4.1 may or may not have closed the
3045 file descriptor. If it did the second close will fail with
3046 errno = EBADF. That means we have succeeded. */
3047 if (rtnval == -1 && did_retry && errno == EBADF)
3048 return 0;
3049
3050 return rtnval;
3051 }
3052
3053 #endif /* INTERRUPTIBLE_CLOSE */
3054
3055 #ifdef INTERRUPTIBLE_IO
3056
3057 int
3058 sys_read (fildes, buf, nbyte)
3059 int fildes;
3060 char *buf;
3061 unsigned int nbyte;
3062 {
3063 register int rtnval;
3064
3065 while ((rtnval = read (fildes, buf, nbyte)) == -1
3066 && (errno == EINTR));
3067 return (rtnval);
3068 }
3069
3070 int
3071 sys_write (fildes, buf, nbyte)
3072 int fildes;
3073 char *buf;
3074 unsigned int nbyte;
3075 {
3076 register int rtnval, bytes_written;
3077
3078 bytes_written = 0;
3079
3080 while (nbyte > 0)
3081 {
3082 rtnval = write (fildes, buf, nbyte);
3083
3084 if (rtnval == -1)
3085 {
3086 if (errno == EINTR)
3087 continue;
3088 else
3089 return (bytes_written ? bytes_written : -1);
3090 }
3091
3092 buf += rtnval;
3093 nbyte -= rtnval;
3094 bytes_written += rtnval;
3095 }
3096 return (bytes_written);
3097 }
3098
3099 #endif /* INTERRUPTIBLE_IO */
3100 \f
3101 #ifndef HAVE_VFORK
3102 #ifndef WINDOWSNT
3103 /*
3104 * Substitute fork for vfork on USG flavors.
3105 */
3106
3107 VFORK_RETURN_TYPE
3108 vfork ()
3109 {
3110 return (fork ());
3111 }
3112 #endif /* not WINDOWSNT */
3113 #endif /* not HAVE_VFORK */
3114 \f
3115 #ifdef USG
3116 /*
3117 * All of the following are for USG.
3118 *
3119 * On USG systems the system calls are INTERRUPTIBLE by signals
3120 * that the user program has elected to catch. Thus the system call
3121 * must be retried in these cases. To handle this without massive
3122 * changes in the source code, we remap the standard system call names
3123 * to names for our own functions in sysdep.c that do the system call
3124 * with retries. Actually, for portability reasons, it is good
3125 * programming practice, as this example shows, to limit all actual
3126 * system calls to a single occurrence in the source. Sure, this
3127 * adds an extra level of function call overhead but it is almost
3128 * always negligible. Fred Fish, Unisoft Systems Inc.
3129 */
3130
3131 #ifndef HAVE_SYS_SIGLIST
3132 char *sys_siglist[NSIG + 1] =
3133 {
3134 #ifdef AIX
3135 /* AIX has changed the signals a bit */
3136 "bogus signal", /* 0 */
3137 "hangup", /* 1 SIGHUP */
3138 "interrupt", /* 2 SIGINT */
3139 "quit", /* 3 SIGQUIT */
3140 "illegal instruction", /* 4 SIGILL */
3141 "trace trap", /* 5 SIGTRAP */
3142 "IOT instruction", /* 6 SIGIOT */
3143 "crash likely", /* 7 SIGDANGER */
3144 "floating point exception", /* 8 SIGFPE */
3145 "kill", /* 9 SIGKILL */
3146 "bus error", /* 10 SIGBUS */
3147 "segmentation violation", /* 11 SIGSEGV */
3148 "bad argument to system call", /* 12 SIGSYS */
3149 "write on a pipe with no one to read it", /* 13 SIGPIPE */
3150 "alarm clock", /* 14 SIGALRM */
3151 "software termination signum", /* 15 SIGTERM */
3152 "user defined signal 1", /* 16 SIGUSR1 */
3153 "user defined signal 2", /* 17 SIGUSR2 */
3154 "death of a child", /* 18 SIGCLD */
3155 "power-fail restart", /* 19 SIGPWR */
3156 "bogus signal", /* 20 */
3157 "bogus signal", /* 21 */
3158 "bogus signal", /* 22 */
3159 "bogus signal", /* 23 */
3160 "bogus signal", /* 24 */
3161 "LAN I/O interrupt", /* 25 SIGAIO */
3162 "PTY I/O interrupt", /* 26 SIGPTY */
3163 "I/O intervention required", /* 27 SIGIOINT */
3164 #ifdef AIXHFT
3165 "HFT grant", /* 28 SIGGRANT */
3166 "HFT retract", /* 29 SIGRETRACT */
3167 "HFT sound done", /* 30 SIGSOUND */
3168 "HFT input ready", /* 31 SIGMSG */
3169 #endif
3170 #else /* not AIX */
3171 "bogus signal", /* 0 */
3172 "hangup", /* 1 SIGHUP */
3173 "interrupt", /* 2 SIGINT */
3174 "quit", /* 3 SIGQUIT */
3175 "illegal instruction", /* 4 SIGILL */
3176 "trace trap", /* 5 SIGTRAP */
3177 "IOT instruction", /* 6 SIGIOT */
3178 "EMT instruction", /* 7 SIGEMT */
3179 "floating point exception", /* 8 SIGFPE */
3180 "kill", /* 9 SIGKILL */
3181 "bus error", /* 10 SIGBUS */
3182 "segmentation violation", /* 11 SIGSEGV */
3183 "bad argument to system call", /* 12 SIGSYS */
3184 "write on a pipe with no one to read it", /* 13 SIGPIPE */
3185 "alarm clock", /* 14 SIGALRM */
3186 "software termination signum", /* 15 SIGTERM */
3187 "user defined signal 1", /* 16 SIGUSR1 */
3188 "user defined signal 2", /* 17 SIGUSR2 */
3189 "death of a child", /* 18 SIGCLD */
3190 "power-fail restart", /* 19 SIGPWR */
3191 #ifdef sun
3192 "window size change", /* 20 SIGWINCH */
3193 "urgent socket condition", /* 21 SIGURG */
3194 "pollable event occurred", /* 22 SIGPOLL */
3195 "stop (cannot be caught or ignored)", /* 23 SIGSTOP */
3196 "user stop requested from tty", /* 24 SIGTSTP */
3197 "stopped process has been continued", /* 25 SIGCONT */
3198 "background tty read attempted", /* 26 SIGTTIN */
3199 "background tty write attempted", /* 27 SIGTTOU */
3200 "virtual timer expired", /* 28 SIGVTALRM */
3201 "profiling timer expired", /* 29 SIGPROF */
3202 "exceeded cpu limit", /* 30 SIGXCPU */
3203 "exceeded file size limit", /* 31 SIGXFSZ */
3204 "process's lwps are blocked", /* 32 SIGWAITING */
3205 "special signal used by thread library", /* 33 SIGLWP */
3206 #ifdef SIGFREEZE
3207 "Special Signal Used By CPR", /* 34 SIGFREEZE */
3208 #endif
3209 #ifdef SIGTHAW
3210 "Special Signal Used By CPR", /* 35 SIGTHAW */
3211 #endif
3212 #endif /* sun */
3213 #endif /* not AIX */
3214 0
3215 };
3216 #endif /* HAVE_SYS_SIGLIST */
3217
3218 /*
3219 * Warning, this function may not duplicate 4.2 action properly
3220 * under error conditions.
3221 */
3222
3223 #ifndef MAXPATHLEN
3224 /* In 4.1, param.h fails to define this. */
3225 #define MAXPATHLEN 1024
3226 #endif
3227
3228 #ifndef HAVE_GETWD
3229
3230 char *
3231 getwd (pathname)
3232 char *pathname;
3233 {
3234 char *npath, *spath;
3235 extern char *getcwd ();
3236
3237 BLOCK_INPUT; /* getcwd uses malloc */
3238 spath = npath = getcwd ((char *) 0, MAXPATHLEN);
3239 if (spath == 0)
3240 return spath;
3241 /* On Altos 3068, getcwd can return @hostname/dir, so discard
3242 up to first slash. Should be harmless on other systems. */
3243 while (*npath && *npath != '/')
3244 npath++;
3245 strcpy (pathname, npath);
3246 free (spath); /* getcwd uses malloc */
3247 UNBLOCK_INPUT;
3248 return pathname;
3249 }
3250
3251 #endif /* HAVE_GETWD */
3252
3253 /*
3254 * Emulate rename using unlink/link. Note that this is
3255 * only partially correct. Also, doesn't enforce restriction
3256 * that files be of same type (regular->regular, dir->dir, etc).
3257 */
3258
3259 #ifndef HAVE_RENAME
3260
3261 rename (from, to)
3262 const char *from;
3263 const char *to;
3264 {
3265 if (access (from, 0) == 0)
3266 {
3267 unlink (to);
3268 if (link (from, to) == 0)
3269 if (unlink (from) == 0)
3270 return (0);
3271 }
3272 return (-1);
3273 }
3274
3275 #endif
3276
3277
3278 #ifdef HPUX
3279 #ifndef HAVE_PERROR
3280
3281 /* HPUX curses library references perror, but as far as we know
3282 it won't be called. Anyway this definition will do for now. */
3283
3284 perror ()
3285 {
3286 }
3287
3288 #endif /* not HAVE_PERROR */
3289 #endif /* HPUX */
3290
3291 #ifndef HAVE_DUP2
3292
3293 /*
3294 * Emulate BSD dup2. First close newd if it already exists.
3295 * Then, attempt to dup oldd. If not successful, call dup2 recursively
3296 * until we are, then close the unsuccessful ones.
3297 */
3298
3299 dup2 (oldd, newd)
3300 int oldd;
3301 int newd;
3302 {
3303 register int fd, ret;
3304
3305 sys_close (newd);
3306
3307 #ifdef F_DUPFD
3308 fd = fcntl (oldd, F_DUPFD, newd);
3309 if (fd != newd)
3310 error ("can't dup2 (%i,%i) : %s", oldd, newd, strerror (errno));
3311 #else
3312 fd = dup (old);
3313 if (fd == -1)
3314 return -1;
3315 if (fd == new)
3316 return new;
3317 ret = dup2 (old,new);
3318 sys_close (fd);
3319 return ret;
3320 #endif
3321 }
3322
3323 #endif /* not HAVE_DUP2 */
3324
3325 /*
3326 * Gettimeofday. Simulate as much as possible. Only accurate
3327 * to nearest second. Emacs doesn't use tzp so ignore it for now.
3328 * Only needed when subprocesses are defined.
3329 */
3330
3331 #ifdef subprocesses
3332 #ifndef VMS
3333 #ifndef HAVE_GETTIMEOFDAY
3334 #ifdef HAVE_TIMEVAL
3335
3336 /* ARGSUSED */
3337 gettimeofday (tp, tzp)
3338 struct timeval *tp;
3339 struct timezone *tzp;
3340 {
3341 extern long time ();
3342
3343 tp->tv_sec = time ((long *)0);
3344 tp->tv_usec = 0;
3345 if (tzp != 0)
3346 tzp->tz_minuteswest = -1;
3347 }
3348
3349 #endif
3350 #endif
3351 #endif
3352 #endif /* subprocess && !HAVE_GETTIMEOFDAY && HAVE_TIMEVAL && !VMS */
3353
3354 /*
3355 * This function will go away as soon as all the stubs fixed. (fnf)
3356 */
3357
3358 croak (badfunc)
3359 char *badfunc;
3360 {
3361 printf ("%s not yet implemented\r\n", badfunc);
3362 reset_sys_modes ();
3363 exit (1);
3364 }
3365
3366 #endif /* USG */
3367 \f
3368 #ifdef DGUX
3369
3370 char *sys_siglist[NSIG + 1] =
3371 {
3372 "null signal", /* 0 SIGNULL */
3373 "hangup", /* 1 SIGHUP */
3374 "interrupt", /* 2 SIGINT */
3375 "quit", /* 3 SIGQUIT */
3376 "illegal instruction", /* 4 SIGILL */
3377 "trace trap", /* 5 SIGTRAP */
3378 "abort termination", /* 6 SIGABRT */
3379 "SIGEMT", /* 7 SIGEMT */
3380 "floating point exception", /* 8 SIGFPE */
3381 "kill", /* 9 SIGKILL */
3382 "bus error", /* 10 SIGBUS */
3383 "segmentation violation", /* 11 SIGSEGV */
3384 "bad argument to system call", /* 12 SIGSYS */
3385 "write on a pipe with no reader", /* 13 SIGPIPE */
3386 "alarm clock", /* 14 SIGALRM */
3387 "software termination signal", /* 15 SIGTERM */
3388 "user defined signal 1", /* 16 SIGUSR1 */
3389 "user defined signal 2", /* 17 SIGUSR2 */
3390 "child stopped or terminated", /* 18 SIGCLD */
3391 "power-fail restart", /* 19 SIGPWR */
3392 "window size changed", /* 20 SIGWINCH */
3393 "undefined", /* 21 */
3394 "pollable event occurred", /* 22 SIGPOLL */
3395 "sendable stop signal not from tty", /* 23 SIGSTOP */
3396 "stop signal from tty", /* 24 SIGSTP */
3397 "continue a stopped process", /* 25 SIGCONT */
3398 "attempted background tty read", /* 26 SIGTTIN */
3399 "attempted background tty write", /* 27 SIGTTOU */
3400 "undefined", /* 28 */
3401 "undefined", /* 29 */
3402 "undefined", /* 30 */
3403 "undefined", /* 31 */
3404 "undefined", /* 32 */
3405 "socket (TCP/IP) urgent data arrival", /* 33 SIGURG */
3406 "I/O is possible", /* 34 SIGIO */
3407 "exceeded cpu time limit", /* 35 SIGXCPU */
3408 "exceeded file size limit", /* 36 SIGXFSZ */
3409 "virtual time alarm", /* 37 SIGVTALRM */
3410 "profiling time alarm", /* 38 SIGPROF */
3411 "undefined", /* 39 */
3412 "file record locks revoked", /* 40 SIGLOST */
3413 "undefined", /* 41 */
3414 "undefined", /* 42 */
3415 "undefined", /* 43 */
3416 "undefined", /* 44 */
3417 "undefined", /* 45 */
3418 "undefined", /* 46 */
3419 "undefined", /* 47 */
3420 "undefined", /* 48 */
3421 "undefined", /* 49 */
3422 "undefined", /* 50 */
3423 "undefined", /* 51 */
3424 "undefined", /* 52 */
3425 "undefined", /* 53 */
3426 "undefined", /* 54 */
3427 "undefined", /* 55 */
3428 "undefined", /* 56 */
3429 "undefined", /* 57 */
3430 "undefined", /* 58 */
3431 "undefined", /* 59 */
3432 "undefined", /* 60 */
3433 "undefined", /* 61 */
3434 "undefined", /* 62 */
3435 "undefined", /* 63 */
3436 "notification message in mess. queue", /* 64 SIGDGNOTIFY */
3437 0
3438 };
3439
3440 #endif /* DGUX */
3441 \f
3442 /* Directory routines for systems that don't have them. */
3443
3444 #ifdef SYSV_SYSTEM_DIR
3445
3446 #include <dirent.h>
3447
3448 #if defined(BROKEN_CLOSEDIR) || !defined(HAVE_CLOSEDIR)
3449
3450 int
3451 closedir (dirp)
3452 register DIR *dirp; /* stream from opendir */
3453 {
3454 int rtnval;
3455
3456 rtnval = sys_close (dirp->dd_fd);
3457
3458 /* Some systems (like Solaris) allocate the buffer and the DIR all
3459 in one block. Why in the world are we freeing this ourselves
3460 anyway? */
3461 #if ! (defined (sun) && defined (USG5_4))
3462 xfree ((char *) dirp->dd_buf); /* directory block defined in <dirent.h> */
3463 #endif
3464 xfree ((char *) dirp);
3465
3466 return rtnval;
3467 }
3468 #endif /* BROKEN_CLOSEDIR or not HAVE_CLOSEDIR */
3469 #endif /* SYSV_SYSTEM_DIR */
3470
3471 #ifdef NONSYSTEM_DIR_LIBRARY
3472
3473 DIR *
3474 opendir (filename)
3475 char *filename; /* name of directory */
3476 {
3477 register DIR *dirp; /* -> malloc'ed storage */
3478 register int fd; /* file descriptor for read */
3479 struct stat sbuf; /* result of fstat */
3480
3481 fd = sys_open (filename, 0);
3482 if (fd < 0)
3483 return 0;
3484
3485 BLOCK_INPUT;
3486 if (fstat (fd, &sbuf) < 0
3487 || (sbuf.st_mode & S_IFMT) != S_IFDIR
3488 || (dirp = (DIR *) malloc (sizeof (DIR))) == 0)
3489 {
3490 sys_close (fd);
3491 UNBLOCK_INPUT;
3492 return 0; /* bad luck today */
3493 }
3494 UNBLOCK_INPUT;
3495
3496 dirp->dd_fd = fd;
3497 dirp->dd_loc = dirp->dd_size = 0; /* refill needed */
3498
3499 return dirp;
3500 }
3501
3502 void
3503 closedir (dirp)
3504 register DIR *dirp; /* stream from opendir */
3505 {
3506 sys_close (dirp->dd_fd);
3507 xfree ((char *) dirp);
3508 }
3509
3510
3511 #ifndef VMS
3512 #define DIRSIZ 14
3513 struct olddir
3514 {
3515 ino_t od_ino; /* inode */
3516 char od_name[DIRSIZ]; /* filename */
3517 };
3518 #endif /* not VMS */
3519
3520 struct direct dir_static; /* simulated directory contents */
3521
3522 /* ARGUSED */
3523 struct direct *
3524 readdir (dirp)
3525 register DIR *dirp; /* stream from opendir */
3526 {
3527 #ifndef VMS
3528 register struct olddir *dp; /* -> directory data */
3529 #else /* VMS */
3530 register struct dir$_name *dp; /* -> directory data */
3531 register struct dir$_version *dv; /* -> version data */
3532 #endif /* VMS */
3533
3534 for (; ;)
3535 {
3536 if (dirp->dd_loc >= dirp->dd_size)
3537 dirp->dd_loc = dirp->dd_size = 0;
3538
3539 if (dirp->dd_size == 0 /* refill buffer */
3540 && (dirp->dd_size = sys_read (dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ)) <= 0)
3541 return 0;
3542
3543 #ifndef VMS
3544 dp = (struct olddir *) &dirp->dd_buf[dirp->dd_loc];
3545 dirp->dd_loc += sizeof (struct olddir);
3546
3547 if (dp->od_ino != 0) /* not deleted entry */
3548 {
3549 dir_static.d_ino = dp->od_ino;
3550 strncpy (dir_static.d_name, dp->od_name, DIRSIZ);
3551 dir_static.d_name[DIRSIZ] = '\0';
3552 dir_static.d_namlen = strlen (dir_static.d_name);
3553 dir_static.d_reclen = sizeof (struct direct)
3554 - MAXNAMLEN + 3
3555 + dir_static.d_namlen - dir_static.d_namlen % 4;
3556 return &dir_static; /* -> simulated structure */
3557 }
3558 #else /* VMS */
3559 dp = (struct dir$_name *) dirp->dd_buf;
3560 if (dirp->dd_loc == 0)
3561 dirp->dd_loc = (dp->dir$b_namecount&1) ? dp->dir$b_namecount + 1
3562 : dp->dir$b_namecount;
3563 dv = (struct dir$_version *)&dp->dir$t_name[dirp->dd_loc];
3564 dir_static.d_ino = dv->dir$w_fid_num;
3565 dir_static.d_namlen = dp->dir$b_namecount;
3566 dir_static.d_reclen = sizeof (struct direct)
3567 - MAXNAMLEN + 3
3568 + dir_static.d_namlen - dir_static.d_namlen % 4;
3569 strncpy (dir_static.d_name, dp->dir$t_name, dp->dir$b_namecount);
3570 dir_static.d_name[dir_static.d_namlen] = '\0';
3571 dirp->dd_loc = dirp->dd_size; /* only one record at a time */
3572 return &dir_static;
3573 #endif /* VMS */
3574 }
3575 }
3576
3577 #ifdef VMS
3578 /* readdirver is just like readdir except it returns all versions of a file
3579 as separate entries. */
3580
3581 /* ARGUSED */
3582 struct direct *
3583 readdirver (dirp)
3584 register DIR *dirp; /* stream from opendir */
3585 {
3586 register struct dir$_name *dp; /* -> directory data */
3587 register struct dir$_version *dv; /* -> version data */
3588
3589 if (dirp->dd_loc >= dirp->dd_size - sizeof (struct dir$_name))
3590 dirp->dd_loc = dirp->dd_size = 0;
3591
3592 if (dirp->dd_size == 0 /* refill buffer */
3593 && (dirp->dd_size = sys_read (dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ)) <= 0)
3594 return 0;
3595
3596 dp = (struct dir$_name *) dirp->dd_buf;
3597 if (dirp->dd_loc == 0)
3598 dirp->dd_loc = (dp->dir$b_namecount & 1) ? dp->dir$b_namecount + 1
3599 : dp->dir$b_namecount;
3600 dv = (struct dir$_version *) &dp->dir$t_name[dirp->dd_loc];
3601 strncpy (dir_static.d_name, dp->dir$t_name, dp->dir$b_namecount);
3602 sprintf (&dir_static.d_name[dp->dir$b_namecount], ";%d", dv->dir$w_version);
3603 dir_static.d_namlen = strlen (dir_static.d_name);
3604 dir_static.d_ino = dv->dir$w_fid_num;
3605 dir_static.d_reclen = sizeof (struct direct) - MAXNAMLEN + 3
3606 + dir_static.d_namlen - dir_static.d_namlen % 4;
3607 dirp->dd_loc = ((char *) (++dv) - dp->dir$t_name);
3608 return &dir_static;
3609 }
3610
3611 #endif /* VMS */
3612
3613 #endif /* NONSYSTEM_DIR_LIBRARY */
3614
3615 \f
3616 int
3617 set_file_times (filename, atime, mtime)
3618 char *filename;
3619 EMACS_TIME atime, mtime;
3620 {
3621 #ifdef HAVE_UTIMES
3622 struct timeval tv[2];
3623 tv[0] = atime;
3624 tv[1] = mtime;
3625 return utimes (filename, tv);
3626 #else /* not HAVE_UTIMES */
3627 struct utimbuf utb;
3628 utb.actime = EMACS_SECS (atime);
3629 utb.modtime = EMACS_SECS (mtime);
3630 return utime (filename, &utb);
3631 #endif /* not HAVE_UTIMES */
3632 }
3633 \f
3634 /* mkdir and rmdir functions, for systems which don't have them. */
3635
3636 #ifndef HAVE_MKDIR
3637 /*
3638 * Written by Robert Rother, Mariah Corporation, August 1985.
3639 *
3640 * If you want it, it's yours. All I ask in return is that if you
3641 * figure out how to do this in a Bourne Shell script you send me
3642 * a copy.
3643 * sdcsvax!rmr or rmr@uscd
3644 *
3645 * Severely hacked over by John Gilmore to make a 4.2BSD compatible
3646 * subroutine. 11Mar86; hoptoad!gnu
3647 *
3648 * Modified by rmtodd@uokmax 6-28-87 -- when making an already existing dir,
3649 * subroutine didn't return EEXIST. It does now.
3650 */
3651
3652 /*
3653 * Make a directory.
3654 */
3655 #ifdef MKDIR_PROTOTYPE
3656 MKDIR_PROTOTYPE
3657 #else
3658 int
3659 mkdir (dpath, dmode)
3660 char *dpath;
3661 int dmode;
3662 #endif
3663 {
3664 int cpid, status, fd;
3665 struct stat statbuf;
3666
3667 if (stat (dpath, &statbuf) == 0)
3668 {
3669 errno = EEXIST; /* Stat worked, so it already exists */
3670 return -1;
3671 }
3672
3673 /* If stat fails for a reason other than non-existence, return error */
3674 if (errno != ENOENT)
3675 return -1;
3676
3677 synch_process_alive = 1;
3678 switch (cpid = fork ())
3679 {
3680
3681 case -1: /* Error in fork */
3682 return (-1); /* Errno is set already */
3683
3684 case 0: /* Child process */
3685 /*
3686 * Cheap hack to set mode of new directory. Since this
3687 * child process is going away anyway, we zap its umask.
3688 * FIXME, this won't suffice to set SUID, SGID, etc. on this
3689 * directory. Does anybody care?
3690 */
3691 status = umask (0); /* Get current umask */
3692 status = umask (status | (0777 & ~dmode)); /* Set for mkdir */
3693 fd = sys_open("/dev/null", 2);
3694 if (fd >= 0)
3695 {
3696 dup2 (fd, 0);
3697 dup2 (fd, 1);
3698 dup2 (fd, 2);
3699 }
3700 execl ("/bin/mkdir", "mkdir", dpath, (char *) 0);
3701 _exit (-1); /* Can't exec /bin/mkdir */
3702
3703 default: /* Parent process */
3704 wait_for_termination (cpid);
3705 }
3706
3707 if (synch_process_death != 0 || synch_process_retcode != 0)
3708 {
3709 errno = EIO; /* We don't know why, but */
3710 return -1; /* /bin/mkdir failed */
3711 }
3712
3713 return 0;
3714 }
3715 #endif /* not HAVE_MKDIR */
3716
3717 #ifndef HAVE_RMDIR
3718 int
3719 rmdir (dpath)
3720 char *dpath;
3721 {
3722 int cpid, status, fd;
3723 struct stat statbuf;
3724
3725 if (stat (dpath, &statbuf) != 0)
3726 {
3727 /* Stat just set errno. We don't have to */
3728 return -1;
3729 }
3730
3731 synch_process_alive = 1;
3732 switch (cpid = fork ())
3733 {
3734
3735 case -1: /* Error in fork */
3736 return (-1); /* Errno is set already */
3737
3738 case 0: /* Child process */
3739 fd = sys_open("/dev/null", 2);
3740 if (fd >= 0)
3741 {
3742 dup2 (fd, 0);
3743 dup2 (fd, 1);
3744 dup2 (fd, 2);
3745 }
3746 execl ("/bin/rmdir", "rmdir", dpath, (char *) 0);
3747 _exit (-1); /* Can't exec /bin/rmdir */
3748
3749 default: /* Parent process */
3750 wait_for_termination (cpid);
3751 }
3752
3753 if (synch_process_death != 0 || synch_process_retcode != 0)
3754 {
3755 errno = EIO; /* We don't know why, but */
3756 return -1; /* /bin/rmdir failed */
3757 }
3758
3759 return 0;
3760 }
3761 #endif /* !HAVE_RMDIR */
3762
3763
3764 \f
3765 /* Functions for VMS */
3766 #ifdef VMS
3767 #include "vms-pwd.h"
3768 #include <acldef.h>
3769 #include <chpdef.h>
3770 #include <jpidef.h>
3771
3772 /* Return as a string the VMS error string pertaining to STATUS.
3773 Reuses the same static buffer each time it is called. */
3774
3775 char *
3776 vmserrstr (status)
3777 int status; /* VMS status code */
3778 {
3779 int bufadr[2];
3780 short len;
3781 static char buf[257];
3782
3783 bufadr[0] = sizeof buf - 1;
3784 bufadr[1] = (int) buf;
3785 if (! (SYS$GETMSG (status, &len, bufadr, 0x1, 0) & 1))
3786 return "untranslatable VMS error status";
3787 buf[len] = '\0';
3788 return buf;
3789 }
3790
3791 #ifdef access
3792 #undef access
3793
3794 /* The following is necessary because 'access' emulation by VMS C (2.0) does
3795 * not work correctly. (It also doesn't work well in version 2.3.)
3796 */
3797
3798 #ifdef VMS4_4
3799
3800 #define DESCRIPTOR(name,string) struct dsc$descriptor_s name = \
3801 { strlen (string), DSC$K_DTYPE_T, DSC$K_CLASS_S, string }
3802
3803 typedef union {
3804 struct {
3805 unsigned short s_buflen;
3806 unsigned short s_code;
3807 char *s_bufadr;
3808 unsigned short *s_retlenadr;
3809 } s;
3810 int end;
3811 } item;
3812 #define buflen s.s_buflen
3813 #define code s.s_code
3814 #define bufadr s.s_bufadr
3815 #define retlenadr s.s_retlenadr
3816
3817 #define R_OK 4 /* test for read permission */
3818 #define W_OK 2 /* test for write permission */
3819 #define X_OK 1 /* test for execute (search) permission */
3820 #define F_OK 0 /* test for presence of file */
3821
3822 int
3823 sys_access (path, mode)
3824 char *path;
3825 int mode;
3826 {
3827 static char *user = NULL;
3828 char dir_fn[512];
3829
3830 /* translate possible directory spec into .DIR file name, so brain-dead
3831 * access can treat the directory like a file. */
3832 if (directory_file_name (path, dir_fn))
3833 path = dir_fn;
3834
3835 if (mode == F_OK)
3836 return access (path, mode);
3837 if (user == NULL && (user = (char *) getenv ("USER")) == NULL)
3838 return -1;
3839 {
3840 int stat;
3841 int flags;
3842 int acces;
3843 unsigned short int dummy;
3844 item itemlst[3];
3845 static int constant = ACL$C_FILE;
3846 DESCRIPTOR (path_desc, path);
3847 DESCRIPTOR (user_desc, user);
3848
3849 flags = 0;
3850 acces = 0;
3851 if ((mode & X_OK) && ((stat = access (path, mode)) < 0 || mode == X_OK))
3852 return stat;
3853 if (mode & R_OK)
3854 acces |= CHP$M_READ;
3855 if (mode & W_OK)
3856 acces |= CHP$M_WRITE;
3857 itemlst[0].buflen = sizeof (int);
3858 itemlst[0].code = CHP$_FLAGS;
3859 itemlst[0].bufadr = (char *) &flags;
3860 itemlst[0].retlenadr = &dummy;
3861 itemlst[1].buflen = sizeof (int);
3862 itemlst[1].code = CHP$_ACCESS;
3863 itemlst[1].bufadr = (char *) &acces;
3864 itemlst[1].retlenadr = &dummy;
3865 itemlst[2].end = CHP$_END;
3866 stat = SYS$CHECK_ACCESS (&constant, &path_desc, &user_desc, itemlst);
3867 return stat == SS$_NORMAL ? 0 : -1;
3868 }
3869 }
3870
3871 #else /* not VMS4_4 */
3872
3873 #include <prvdef.h>
3874 #define ACE$M_WRITE 2
3875 #define ACE$C_KEYID 1
3876
3877 static unsigned short memid, grpid;
3878 static unsigned int uic;
3879
3880 /* Called from init_sys_modes, so it happens not very often
3881 but at least each time Emacs is loaded. */
3882 sys_access_reinit ()
3883 {
3884 uic = 0;
3885 }
3886
3887 int
3888 sys_access (filename, type)
3889 char * filename;
3890 int type;
3891 {
3892 struct FAB fab;
3893 struct XABPRO xab;
3894 int status, size, i, typecode, acl_controlled;
3895 unsigned int *aclptr, *aclend, aclbuf[60];
3896 union prvdef prvmask;
3897
3898 /* Get UIC and GRP values for protection checking. */
3899 if (uic == 0)
3900 {
3901 status = LIB$GETJPI (&JPI$_UIC, 0, 0, &uic, 0, 0);
3902 if (! (status & 1))
3903 return -1;
3904 memid = uic & 0xFFFF;
3905 grpid = uic >> 16;
3906 }
3907
3908 if (type != 2) /* not checking write access */
3909 return access (filename, type);
3910
3911 /* Check write protection. */
3912
3913 #define CHECKPRIV(bit) (prvmask.bit)
3914 #define WRITABLE(field) (! ((xab.xab$w_pro >> field) & XAB$M_NOWRITE))
3915
3916 /* Find privilege bits */
3917 status = SYS$SETPRV (0, 0, 0, prvmask);
3918 if (! (status & 1))
3919 error ("Unable to find privileges: %s", vmserrstr (status));
3920 if (CHECKPRIV (PRV$V_BYPASS))
3921 return 0; /* BYPASS enabled */
3922 fab = cc$rms_fab;
3923 fab.fab$b_fac = FAB$M_GET;
3924 fab.fab$l_fna = filename;
3925 fab.fab$b_fns = strlen (filename);
3926 fab.fab$l_xab = &xab;
3927 xab = cc$rms_xabpro;
3928 xab.xab$l_aclbuf = aclbuf;
3929 xab.xab$w_aclsiz = sizeof (aclbuf);
3930 status = SYS$OPEN (&fab, 0, 0);
3931 if (! (status & 1))
3932 return -1;
3933 SYS$CLOSE (&fab, 0, 0);
3934 /* Check system access */
3935 if (CHECKPRIV (PRV$V_SYSPRV) && WRITABLE (XAB$V_SYS))
3936 return 0;
3937 /* Check ACL entries, if any */
3938 acl_controlled = 0;
3939 if (xab.xab$w_acllen > 0)
3940 {
3941 aclptr = aclbuf;
3942 aclend = &aclbuf[xab.xab$w_acllen / 4];
3943 while (*aclptr && aclptr < aclend)
3944 {
3945 size = (*aclptr & 0xff) / 4;
3946 typecode = (*aclptr >> 8) & 0xff;
3947 if (typecode == ACE$C_KEYID)
3948 for (i = size - 1; i > 1; i--)
3949 if (aclptr[i] == uic)
3950 {
3951 acl_controlled = 1;
3952 if (aclptr[1] & ACE$M_WRITE)
3953 return 0; /* Write access through ACL */
3954 }
3955 aclptr = &aclptr[size];
3956 }
3957 if (acl_controlled) /* ACL specified, prohibits write access */
3958 return -1;
3959 }
3960 /* No ACL entries specified, check normal protection */
3961 if (WRITABLE (XAB$V_WLD)) /* World writable */
3962 return 0;
3963 if (WRITABLE (XAB$V_GRP) &&
3964 (unsigned short) (xab.xab$l_uic >> 16) == grpid)
3965 return 0; /* Group writable */
3966 if (WRITABLE (XAB$V_OWN) &&
3967 (xab.xab$l_uic & 0xFFFF) == memid)
3968 return 0; /* Owner writable */
3969
3970 return -1; /* Not writable */
3971 }
3972 #endif /* not VMS4_4 */
3973 #endif /* access */
3974
3975 static char vtbuf[NAM$C_MAXRSS+1];
3976
3977 /* translate a vms file spec to a unix path */
3978 char *
3979 sys_translate_vms (vfile)
3980 char * vfile;
3981 {
3982 char * p;
3983 char * targ;
3984
3985 if (!vfile)
3986 return 0;
3987
3988 targ = vtbuf;
3989
3990 /* leading device or logical name is a root directory */
3991 if (p = strchr (vfile, ':'))
3992 {
3993 *targ++ = '/';
3994 while (vfile < p)
3995 *targ++ = *vfile++;
3996 vfile++;
3997 *targ++ = '/';
3998 }
3999 p = vfile;
4000 if (*p == '[' || *p == '<')
4001 {
4002 while (*++vfile != *p + 2)
4003 switch (*vfile)
4004 {
4005 case '.':
4006 if (vfile[-1] == *p)
4007 *targ++ = '.';
4008 *targ++ = '/';
4009 break;
4010
4011 case '-':
4012 *targ++ = '.';
4013 *targ++ = '.';
4014 break;
4015
4016 default:
4017 *targ++ = *vfile;
4018 break;
4019 }
4020 vfile++;
4021 *targ++ = '/';
4022 }
4023 while (*vfile)
4024 *targ++ = *vfile++;
4025
4026 return vtbuf;
4027 }
4028
4029 static char utbuf[NAM$C_MAXRSS+1];
4030
4031 /* translate a unix path to a VMS file spec */
4032 char *
4033 sys_translate_unix (ufile)
4034 char * ufile;
4035 {
4036 int slash_seen = 0;
4037 char *p;
4038 char * targ;
4039
4040 if (!ufile)
4041 return 0;
4042
4043 targ = utbuf;
4044
4045 if (*ufile == '/')
4046 {
4047 ufile++;
4048 }
4049
4050 while (*ufile)
4051 {
4052 switch (*ufile)
4053 {
4054 case '/':
4055 if (slash_seen)
4056 if (index (&ufile[1], '/'))
4057 *targ++ = '.';
4058 else
4059 *targ++ = ']';
4060 else
4061 {
4062 *targ++ = ':';
4063 if (index (&ufile[1], '/'))
4064 *targ++ = '[';
4065 slash_seen = 1;
4066 }
4067 break;
4068
4069 case '.':
4070 if (strncmp (ufile, "./", 2) == 0)
4071 {
4072 if (!slash_seen)
4073 {
4074 *targ++ = '[';
4075 slash_seen = 1;
4076 }
4077 ufile++; /* skip the dot */
4078 if (index (&ufile[1], '/'))
4079 *targ++ = '.';
4080 else
4081 *targ++ = ']';
4082 }
4083 else if (strncmp (ufile, "../", 3) == 0)
4084 {
4085 if (!slash_seen)
4086 {
4087 *targ++ = '[';
4088 slash_seen = 1;
4089 }
4090 *targ++ = '-';
4091 ufile += 2; /* skip the dots */
4092 if (index (&ufile[1], '/'))
4093 *targ++ = '.';
4094 else
4095 *targ++ = ']';
4096 }
4097 else
4098 *targ++ = *ufile;
4099 break;
4100
4101 default:
4102 *targ++ = *ufile;
4103 break;
4104 }
4105 ufile++;
4106 }
4107 *targ = '\0';
4108
4109 return utbuf;
4110 }
4111
4112 char *
4113 getwd (pathname)
4114 char *pathname;
4115 {
4116 char *ptr, *val;
4117 extern char *getcwd ();
4118
4119 #define MAXPATHLEN 1024
4120
4121 ptr = xmalloc (MAXPATHLEN);
4122 val = getcwd (ptr, MAXPATHLEN);
4123 if (val == 0)
4124 {
4125 xfree (ptr);
4126 return val;
4127 }
4128 strcpy (pathname, ptr);
4129 xfree (ptr);
4130
4131 return pathname;
4132 }
4133
4134 getppid ()
4135 {
4136 long item_code = JPI$_OWNER;
4137 unsigned long parent_id;
4138 int status;
4139
4140 if (((status = LIB$GETJPI (&item_code, 0, 0, &parent_id)) & 1) == 0)
4141 {
4142 errno = EVMSERR;
4143 vaxc$errno = status;
4144 return -1;
4145 }
4146 return parent_id;
4147 }
4148
4149 #undef getuid
4150 unsigned
4151 sys_getuid ()
4152 {
4153 return (getgid () << 16) | getuid ();
4154 }
4155
4156 int
4157 sys_read (fildes, buf, nbyte)
4158 int fildes;
4159 char *buf;
4160 unsigned int nbyte;
4161 {
4162 return read (fildes, buf, (nbyte < MAXIOSIZE ? nbyte : MAXIOSIZE));
4163 }
4164
4165 #if 0
4166 int
4167 sys_write (fildes, buf, nbyte)
4168 int fildes;
4169 char *buf;
4170 unsigned int nbyte;
4171 {
4172 register int nwrote, rtnval = 0;
4173
4174 while (nbyte > MAXIOSIZE && (nwrote = write (fildes, buf, MAXIOSIZE)) > 0) {
4175 nbyte -= nwrote;
4176 buf += nwrote;
4177 rtnval += nwrote;
4178 }
4179 if (nwrote < 0)
4180 return rtnval ? rtnval : -1;
4181 if ((nwrote = write (fildes, buf, nbyte)) < 0)
4182 return rtnval ? rtnval : -1;
4183 return (rtnval + nwrote);
4184 }
4185 #endif /* 0 */
4186
4187 /*
4188 * VAX/VMS VAX C RTL really loses. It insists that records
4189 * end with a newline (carriage return) character, and if they
4190 * don't it adds one (nice of it isn't it!)
4191 *
4192 * Thus we do this stupidity below.
4193 */
4194
4195 int
4196 sys_write (fildes, buf, nbytes)
4197 int fildes;
4198 char *buf;
4199 unsigned int nbytes;
4200 {
4201 register char *p;
4202 register char *e;
4203 int sum = 0;
4204 struct stat st;
4205
4206 fstat (fildes, &st);
4207 p = buf;
4208 while (nbytes > 0)
4209 {
4210 int len, retval;
4211
4212 /* Handle fixed-length files with carriage control. */
4213 if (st.st_fab_rfm == FAB$C_FIX
4214 && ((st.st_fab_rat & (FAB$M_FTN | FAB$M_CR)) != 0))
4215 {
4216 len = st.st_fab_mrs;
4217 retval = write (fildes, p, min (len, nbytes));
4218 if (retval != len)
4219 return -1;
4220 retval++; /* This skips the implied carriage control */
4221 }
4222 else
4223 {
4224 e = p + min (MAXIOSIZE, nbytes) - 1;
4225 while (*e != '\n' && e > p) e--;
4226 if (p == e) /* Ok.. so here we add a newline... sigh. */
4227 e = p + min (MAXIOSIZE, nbytes) - 1;
4228 len = e + 1 - p;
4229 retval = write (fildes, p, len);
4230 if (retval != len)
4231 return -1;
4232 }
4233 p += retval;
4234 sum += retval;
4235 nbytes -= retval;
4236 }
4237 return sum;
4238 }
4239
4240 /* Create file NEW copying its attributes from file OLD. If
4241 OLD is 0 or does not exist, create based on the value of
4242 vms_stmlf_recfm. */
4243
4244 /* Protection value the file should ultimately have.
4245 Set by create_copy_attrs, and use by rename_sansversions. */
4246 static unsigned short int fab_final_pro;
4247
4248 int
4249 creat_copy_attrs (old, new)
4250 char *old, *new;
4251 {
4252 struct FAB fab = cc$rms_fab;
4253 struct XABPRO xabpro;
4254 char aclbuf[256]; /* Choice of size is arbitrary. See below. */
4255 extern int vms_stmlf_recfm;
4256
4257 if (old)
4258 {
4259 fab.fab$b_fac = FAB$M_GET;
4260 fab.fab$l_fna = old;
4261 fab.fab$b_fns = strlen (old);
4262 fab.fab$l_xab = (char *) &xabpro;
4263 xabpro = cc$rms_xabpro;
4264 xabpro.xab$l_aclbuf = aclbuf;
4265 xabpro.xab$w_aclsiz = sizeof aclbuf;
4266 /* Call $OPEN to fill in the fab & xabpro fields. */
4267 if (SYS$OPEN (&fab, 0, 0) & 1)
4268 {
4269 SYS$CLOSE (&fab, 0, 0);
4270 fab.fab$l_alq = 0; /* zero the allocation quantity */
4271 if (xabpro.xab$w_acllen > 0)
4272 {
4273 if (xabpro.xab$w_acllen > sizeof aclbuf)
4274 /* If the acl buffer was too short, redo open with longer one.
4275 Wouldn't need to do this if there were some system imposed
4276 limit on the size of an ACL, but I can't find any such. */
4277 {
4278 xabpro.xab$l_aclbuf = (char *) alloca (xabpro.xab$w_acllen);
4279 xabpro.xab$w_aclsiz = xabpro.xab$w_acllen;
4280 if (SYS$OPEN (&fab, 0, 0) & 1)
4281 SYS$CLOSE (&fab, 0, 0);
4282 else
4283 old = 0;
4284 }
4285 }
4286 else
4287 xabpro.xab$l_aclbuf = 0;
4288 }
4289 else
4290 old = 0;
4291 }
4292 fab.fab$l_fna = new;
4293 fab.fab$b_fns = strlen (new);
4294 if (!old)
4295 {
4296 fab.fab$l_xab = 0;
4297 fab.fab$b_rfm = vms_stmlf_recfm ? FAB$C_STMLF : FAB$C_VAR;
4298 fab.fab$b_rat = FAB$M_CR;
4299 }
4300
4301 /* Set the file protections such that we will be able to manipulate
4302 this file. Once we are done writing and renaming it, we will set
4303 the protections back. */
4304 if (old)
4305 fab_final_pro = xabpro.xab$w_pro;
4306 else
4307 SYS$SETDFPROT (0, &fab_final_pro);
4308 xabpro.xab$w_pro &= 0xff0f; /* set O:rewd for now. This is set back later. */
4309
4310 /* Create the new file with either default attrs or attrs copied
4311 from old file. */
4312 if (!(SYS$CREATE (&fab, 0, 0) & 1))
4313 return -1;
4314 SYS$CLOSE (&fab, 0, 0);
4315 /* As this is a "replacement" for creat, return a file descriptor
4316 opened for writing. */
4317 return open (new, O_WRONLY);
4318 }
4319
4320 #ifdef creat
4321 #undef creat
4322 #include <varargs.h>
4323 #ifdef __GNUC__
4324 #ifndef va_count
4325 #define va_count(X) ((X) = *(((int *) &(va_alist)) - 1))
4326 #endif
4327 #endif
4328
4329 sys_creat (va_alist)
4330 va_dcl
4331 {
4332 va_list list_incrementer;
4333 char *name;
4334 int mode;
4335 int rfd; /* related file descriptor */
4336 int fd; /* Our new file descriptor */
4337 int count;
4338 struct stat st_buf;
4339 char rfm[12];
4340 char rat[15];
4341 char mrs[13];
4342 char fsz[13];
4343 extern int vms_stmlf_recfm;
4344
4345 va_count (count);
4346 va_start (list_incrementer);
4347 name = va_arg (list_incrementer, char *);
4348 mode = va_arg (list_incrementer, int);
4349 if (count > 2)
4350 rfd = va_arg (list_incrementer, int);
4351 va_end (list_incrementer);
4352 if (count > 2)
4353 {
4354 /* Use information from the related file descriptor to set record
4355 format of the newly created file. */
4356 fstat (rfd, &st_buf);
4357 switch (st_buf.st_fab_rfm)
4358 {
4359 case FAB$C_FIX:
4360 strcpy (rfm, "rfm = fix");
4361 sprintf (mrs, "mrs = %d", st_buf.st_fab_mrs);
4362 strcpy (rat, "rat = ");
4363 if (st_buf.st_fab_rat & FAB$M_CR)
4364 strcat (rat, "cr");
4365 else if (st_buf.st_fab_rat & FAB$M_FTN)
4366 strcat (rat, "ftn");
4367 else if (st_buf.st_fab_rat & FAB$M_PRN)
4368 strcat (rat, "prn");
4369 if (st_buf.st_fab_rat & FAB$M_BLK)
4370 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4371 strcat (rat, ", blk");
4372 else
4373 strcat (rat, "blk");
4374 return creat (name, 0, rfm, rat, mrs);
4375
4376 case FAB$C_VFC:
4377 strcpy (rfm, "rfm = vfc");
4378 sprintf (fsz, "fsz = %d", st_buf.st_fab_fsz);
4379 strcpy (rat, "rat = ");
4380 if (st_buf.st_fab_rat & FAB$M_CR)
4381 strcat (rat, "cr");
4382 else if (st_buf.st_fab_rat & FAB$M_FTN)
4383 strcat (rat, "ftn");
4384 else if (st_buf.st_fab_rat & FAB$M_PRN)
4385 strcat (rat, "prn");
4386 if (st_buf.st_fab_rat & FAB$M_BLK)
4387 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4388 strcat (rat, ", blk");
4389 else
4390 strcat (rat, "blk");
4391 return creat (name, 0, rfm, rat, fsz);
4392
4393 case FAB$C_STM:
4394 strcpy (rfm, "rfm = stm");
4395 break;
4396
4397 case FAB$C_STMCR:
4398 strcpy (rfm, "rfm = stmcr");
4399 break;
4400
4401 case FAB$C_STMLF:
4402 strcpy (rfm, "rfm = stmlf");
4403 break;
4404
4405 case FAB$C_UDF:
4406 strcpy (rfm, "rfm = udf");
4407 break;
4408
4409 case FAB$C_VAR:
4410 strcpy (rfm, "rfm = var");
4411 break;
4412 }
4413 strcpy (rat, "rat = ");
4414 if (st_buf.st_fab_rat & FAB$M_CR)
4415 strcat (rat, "cr");
4416 else if (st_buf.st_fab_rat & FAB$M_FTN)
4417 strcat (rat, "ftn");
4418 else if (st_buf.st_fab_rat & FAB$M_PRN)
4419 strcat (rat, "prn");
4420 if (st_buf.st_fab_rat & FAB$M_BLK)
4421 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4422 strcat (rat, ", blk");
4423 else
4424 strcat (rat, "blk");
4425 }
4426 else
4427 {
4428 strcpy (rfm, vms_stmlf_recfm ? "rfm = stmlf" : "rfm=var");
4429 strcpy (rat, "rat=cr");
4430 }
4431 /* Until the VAX C RTL fixes the many bugs with modes, always use
4432 mode 0 to get the user's default protection. */
4433 fd = creat (name, 0, rfm, rat);
4434 if (fd < 0 && errno == EEXIST)
4435 {
4436 if (unlink (name) < 0)
4437 report_file_error ("delete", build_string (name));
4438 fd = creat (name, 0, rfm, rat);
4439 }
4440 return fd;
4441 }
4442 #endif /* creat */
4443
4444 /* fwrite to stdout is S L O W. Speed it up by using fputc...*/
4445 sys_fwrite (ptr, size, num, fp)
4446 register char * ptr;
4447 FILE * fp;
4448 {
4449 register int tot = num * size;
4450
4451 while (tot--)
4452 fputc (*ptr++, fp);
4453 }
4454
4455 /*
4456 * The VMS C library routine creat actually creates a new version of an
4457 * existing file rather than truncating the old version. There are times
4458 * when this is not the desired behavior, for instance, when writing an
4459 * auto save file (you only want one version), or when you don't have
4460 * write permission in the directory containing the file (but the file
4461 * itself is writable). Hence this routine, which is equivalent to
4462 * "close (creat (fn, 0));" on Unix if fn already exists.
4463 */
4464 int
4465 vms_truncate (fn)
4466 char *fn;
4467 {
4468 struct FAB xfab = cc$rms_fab;
4469 struct RAB xrab = cc$rms_rab;
4470 int status;
4471
4472 xfab.fab$l_fop = FAB$M_TEF; /* free allocated but unused blocks on close */
4473 xfab.fab$b_fac = FAB$M_TRN | FAB$M_GET; /* allow truncate and get access */
4474 xfab.fab$b_shr = FAB$M_NIL; /* allow no sharing - file must be locked */
4475 xfab.fab$l_fna = fn;
4476 xfab.fab$b_fns = strlen (fn);
4477 xfab.fab$l_dna = ";0"; /* default to latest version of the file */
4478 xfab.fab$b_dns = 2;
4479 xrab.rab$l_fab = &xfab;
4480
4481 /* This gibberish opens the file, positions to the first record, and
4482 deletes all records from there until the end of file. */
4483 if ((SYS$OPEN (&xfab) & 01) == 01)
4484 {
4485 if ((SYS$CONNECT (&xrab) & 01) == 01 &&
4486 (SYS$FIND (&xrab) & 01) == 01 &&
4487 (SYS$TRUNCATE (&xrab) & 01) == 01)
4488 status = 0;
4489 else
4490 status = -1;
4491 }
4492 else
4493 status = -1;
4494 SYS$CLOSE (&xfab);
4495 return status;
4496 }
4497
4498 /* Define this symbol to actually read SYSUAF.DAT. This requires either
4499 SYSPRV or a readable SYSUAF.DAT. */
4500
4501 #ifdef READ_SYSUAF
4502 /*
4503 * getuaf.c
4504 *
4505 * Routine to read the VMS User Authorization File and return
4506 * a specific user's record.
4507 */
4508
4509 static struct UAF retuaf;
4510
4511 struct UAF *
4512 get_uaf_name (uname)
4513 char * uname;
4514 {
4515 register status;
4516 struct FAB uaf_fab;
4517 struct RAB uaf_rab;
4518
4519 uaf_fab = cc$rms_fab;
4520 uaf_rab = cc$rms_rab;
4521 /* initialize fab fields */
4522 uaf_fab.fab$l_fna = "SYS$SYSTEM:SYSUAF.DAT";
4523 uaf_fab.fab$b_fns = 21;
4524 uaf_fab.fab$b_fac = FAB$M_GET;
4525 uaf_fab.fab$b_org = FAB$C_IDX;
4526 uaf_fab.fab$b_shr = FAB$M_GET|FAB$M_PUT|FAB$M_UPD|FAB$M_DEL;
4527 /* initialize rab fields */
4528 uaf_rab.rab$l_fab = &uaf_fab;
4529 /* open the User Authorization File */
4530 status = SYS$OPEN (&uaf_fab);
4531 if (!(status&1))
4532 {
4533 errno = EVMSERR;
4534 vaxc$errno = status;
4535 return 0;
4536 }
4537 status = SYS$CONNECT (&uaf_rab);
4538 if (!(status&1))
4539 {
4540 errno = EVMSERR;
4541 vaxc$errno = status;
4542 return 0;
4543 }
4544 /* read the requested record - index is in uname */
4545 uaf_rab.rab$l_kbf = uname;
4546 uaf_rab.rab$b_ksz = strlen (uname);
4547 uaf_rab.rab$b_rac = RAB$C_KEY;
4548 uaf_rab.rab$l_ubf = (char *)&retuaf;
4549 uaf_rab.rab$w_usz = sizeof retuaf;
4550 status = SYS$GET (&uaf_rab);
4551 if (!(status&1))
4552 {
4553 errno = EVMSERR;
4554 vaxc$errno = status;
4555 return 0;
4556 }
4557 /* close the User Authorization File */
4558 status = SYS$DISCONNECT (&uaf_rab);
4559 if (!(status&1))
4560 {
4561 errno = EVMSERR;
4562 vaxc$errno = status;
4563 return 0;
4564 }
4565 status = SYS$CLOSE (&uaf_fab);
4566 if (!(status&1))
4567 {
4568 errno = EVMSERR;
4569 vaxc$errno = status;
4570 return 0;
4571 }
4572 return &retuaf;
4573 }
4574
4575 struct UAF *
4576 get_uaf_uic (uic)
4577 unsigned long uic;
4578 {
4579 register status;
4580 struct FAB uaf_fab;
4581 struct RAB uaf_rab;
4582
4583 uaf_fab = cc$rms_fab;
4584 uaf_rab = cc$rms_rab;
4585 /* initialize fab fields */
4586 uaf_fab.fab$l_fna = "SYS$SYSTEM:SYSUAF.DAT";
4587 uaf_fab.fab$b_fns = 21;
4588 uaf_fab.fab$b_fac = FAB$M_GET;
4589 uaf_fab.fab$b_org = FAB$C_IDX;
4590 uaf_fab.fab$b_shr = FAB$M_GET|FAB$M_PUT|FAB$M_UPD|FAB$M_DEL;
4591 /* initialize rab fields */
4592 uaf_rab.rab$l_fab = &uaf_fab;
4593 /* open the User Authorization File */
4594 status = SYS$OPEN (&uaf_fab);
4595 if (!(status&1))
4596 {
4597 errno = EVMSERR;
4598 vaxc$errno = status;
4599 return 0;
4600 }
4601 status = SYS$CONNECT (&uaf_rab);
4602 if (!(status&1))
4603 {
4604 errno = EVMSERR;
4605 vaxc$errno = status;
4606 return 0;
4607 }
4608 /* read the requested record - index is in uic */
4609 uaf_rab.rab$b_krf = 1; /* 1st alternate key */
4610 uaf_rab.rab$l_kbf = (char *) &uic;
4611 uaf_rab.rab$b_ksz = sizeof uic;
4612 uaf_rab.rab$b_rac = RAB$C_KEY;
4613 uaf_rab.rab$l_ubf = (char *)&retuaf;
4614 uaf_rab.rab$w_usz = sizeof retuaf;
4615 status = SYS$GET (&uaf_rab);
4616 if (!(status&1))
4617 {
4618 errno = EVMSERR;
4619 vaxc$errno = status;
4620 return 0;
4621 }
4622 /* close the User Authorization File */
4623 status = SYS$DISCONNECT (&uaf_rab);
4624 if (!(status&1))
4625 {
4626 errno = EVMSERR;
4627 vaxc$errno = status;
4628 return 0;
4629 }
4630 status = SYS$CLOSE (&uaf_fab);
4631 if (!(status&1))
4632 {
4633 errno = EVMSERR;
4634 vaxc$errno = status;
4635 return 0;
4636 }
4637 return &retuaf;
4638 }
4639
4640 static struct passwd retpw;
4641
4642 struct passwd *
4643 cnv_uaf_pw (up)
4644 struct UAF * up;
4645 {
4646 char * ptr;
4647
4648 /* copy these out first because if the username is 32 chars, the next
4649 section will overwrite the first byte of the UIC */
4650 retpw.pw_uid = up->uaf$w_mem;
4651 retpw.pw_gid = up->uaf$w_grp;
4652
4653 /* I suppose this is not the best style, to possibly overwrite one
4654 byte beyond the end of the field, but what the heck... */
4655 ptr = &up->uaf$t_username[UAF$S_USERNAME];
4656 while (ptr[-1] == ' ')
4657 ptr--;
4658 *ptr = '\0';
4659 strcpy (retpw.pw_name, up->uaf$t_username);
4660
4661 /* the rest of these are counted ascii strings */
4662 strncpy (retpw.pw_gecos, &up->uaf$t_owner[1], up->uaf$t_owner[0]);
4663 retpw.pw_gecos[up->uaf$t_owner[0]] = '\0';
4664 strncpy (retpw.pw_dir, &up->uaf$t_defdev[1], up->uaf$t_defdev[0]);
4665 retpw.pw_dir[up->uaf$t_defdev[0]] = '\0';
4666 strncat (retpw.pw_dir, &up->uaf$t_defdir[1], up->uaf$t_defdir[0]);
4667 retpw.pw_dir[up->uaf$t_defdev[0] + up->uaf$t_defdir[0]] = '\0';
4668 strncpy (retpw.pw_shell, &up->uaf$t_defcli[1], up->uaf$t_defcli[0]);
4669 retpw.pw_shell[up->uaf$t_defcli[0]] = '\0';
4670
4671 return &retpw;
4672 }
4673 #else /* not READ_SYSUAF */
4674 static struct passwd retpw;
4675 #endif /* not READ_SYSUAF */
4676
4677 struct passwd *
4678 getpwnam (name)
4679 char * name;
4680 {
4681 #ifdef READ_SYSUAF
4682 struct UAF *up;
4683 #else
4684 char * user;
4685 char * dir;
4686 unsigned char * full;
4687 #endif /* READ_SYSUAF */
4688 char *ptr = name;
4689
4690 while (*ptr)
4691 {
4692 if ('a' <= *ptr && *ptr <= 'z')
4693 *ptr -= 040;
4694 ptr++;
4695 }
4696 #ifdef READ_SYSUAF
4697 if (!(up = get_uaf_name (name)))
4698 return 0;
4699 return cnv_uaf_pw (up);
4700 #else
4701 if (strcmp (name, getenv ("USER")) == 0)
4702 {
4703 retpw.pw_uid = getuid ();
4704 retpw.pw_gid = getgid ();
4705 strcpy (retpw.pw_name, name);
4706 if (full = egetenv ("FULLNAME"))
4707 strcpy (retpw.pw_gecos, full);
4708 else
4709 *retpw.pw_gecos = '\0';
4710 strcpy (retpw.pw_dir, egetenv ("HOME"));
4711 *retpw.pw_shell = '\0';
4712 return &retpw;
4713 }
4714 else
4715 return 0;
4716 #endif /* not READ_SYSUAF */
4717 }
4718
4719 struct passwd *
4720 getpwuid (uid)
4721 unsigned long uid;
4722 {
4723 #ifdef READ_SYSUAF
4724 struct UAF * up;
4725
4726 if (!(up = get_uaf_uic (uid)))
4727 return 0;
4728 return cnv_uaf_pw (up);
4729 #else
4730 if (uid == sys_getuid ())
4731 return getpwnam (egetenv ("USER"));
4732 else
4733 return 0;
4734 #endif /* not READ_SYSUAF */
4735 }
4736
4737 /* return total address space available to the current process. This is
4738 the sum of the current p0 size, p1 size and free page table entries
4739 available. */
4740 vlimit ()
4741 {
4742 int item_code;
4743 unsigned long free_pages;
4744 unsigned long frep0va;
4745 unsigned long frep1va;
4746 register status;
4747
4748 item_code = JPI$_FREPTECNT;
4749 if (((status = LIB$GETJPI (&item_code, 0, 0, &free_pages)) & 1) == 0)
4750 {
4751 errno = EVMSERR;
4752 vaxc$errno = status;
4753 return -1;
4754 }
4755 free_pages *= 512;
4756
4757 item_code = JPI$_FREP0VA;
4758 if (((status = LIB$GETJPI (&item_code, 0, 0, &frep0va)) & 1) == 0)
4759 {
4760 errno = EVMSERR;
4761 vaxc$errno = status;
4762 return -1;
4763 }
4764 item_code = JPI$_FREP1VA;
4765 if (((status = LIB$GETJPI (&item_code, 0, 0, &frep1va)) & 1) == 0)
4766 {
4767 errno = EVMSERR;
4768 vaxc$errno = status;
4769 return -1;
4770 }
4771
4772 return free_pages + frep0va + (0x7fffffff - frep1va);
4773 }
4774
4775 define_logical_name (varname, string)
4776 char *varname;
4777 char *string;
4778 {
4779 struct dsc$descriptor_s strdsc =
4780 {strlen (string), DSC$K_DTYPE_T, DSC$K_CLASS_S, string};
4781 struct dsc$descriptor_s envdsc =
4782 {strlen (varname), DSC$K_DTYPE_T, DSC$K_CLASS_S, varname};
4783 struct dsc$descriptor_s lnmdsc =
4784 {7, DSC$K_DTYPE_T, DSC$K_CLASS_S, "LNM$JOB"};
4785
4786 return LIB$SET_LOGICAL (&envdsc, &strdsc, &lnmdsc, 0, 0);
4787 }
4788
4789 delete_logical_name (varname)
4790 char *varname;
4791 {
4792 struct dsc$descriptor_s envdsc =
4793 {strlen (varname), DSC$K_DTYPE_T, DSC$K_CLASS_S, varname};
4794 struct dsc$descriptor_s lnmdsc =
4795 {7, DSC$K_DTYPE_T, DSC$K_CLASS_S, "LNM$JOB"};
4796
4797 return LIB$DELETE_LOGICAL (&envdsc, &lnmdsc);
4798 }
4799
4800 ulimit ()
4801 {}
4802
4803 setpgrp ()
4804 {}
4805
4806 execvp ()
4807 {
4808 error ("execvp system call not implemented");
4809 }
4810
4811 int
4812 rename (from, to)
4813 char *from, *to;
4814 {
4815 int status;
4816 struct FAB from_fab = cc$rms_fab, to_fab = cc$rms_fab;
4817 struct NAM from_nam = cc$rms_nam, to_nam = cc$rms_nam;
4818 char from_esn[NAM$C_MAXRSS];
4819 char to_esn[NAM$C_MAXRSS];
4820
4821 from_fab.fab$l_fna = from;
4822 from_fab.fab$b_fns = strlen (from);
4823 from_fab.fab$l_nam = &from_nam;
4824 from_fab.fab$l_fop = FAB$M_NAM;
4825
4826 from_nam.nam$l_esa = from_esn;
4827 from_nam.nam$b_ess = sizeof from_esn;
4828
4829 to_fab.fab$l_fna = to;
4830 to_fab.fab$b_fns = strlen (to);
4831 to_fab.fab$l_nam = &to_nam;
4832 to_fab.fab$l_fop = FAB$M_NAM;
4833
4834 to_nam.nam$l_esa = to_esn;
4835 to_nam.nam$b_ess = sizeof to_esn;
4836
4837 status = SYS$RENAME (&from_fab, 0, 0, &to_fab);
4838
4839 if (status & 1)
4840 return 0;
4841 else
4842 {
4843 if (status == RMS$_DEV)
4844 errno = EXDEV;
4845 else
4846 errno = EVMSERR;
4847 vaxc$errno = status;
4848 return -1;
4849 }
4850 }
4851
4852 /* This function renames a file like `rename', but it strips
4853 the version number from the "to" filename, such that the "to" file is
4854 will always be a new version. It also sets the file protection once it is
4855 finished. The protection that we will use is stored in fab_final_pro,
4856 and was set when we did a creat_copy_attrs to create the file that we
4857 are renaming.
4858
4859 We could use the chmod function, but Eunichs uses 3 bits per user category
4860 to describe the protection, and VMS uses 4 (write and delete are separate
4861 bits). To maintain portability, the VMS implementation of `chmod' wires
4862 the W and D bits together. */
4863
4864
4865 static struct fibdef fib; /* We need this initialized to zero */
4866 char vms_file_written[NAM$C_MAXRSS];
4867
4868 int
4869 rename_sans_version (from,to)
4870 char *from, *to;
4871 {
4872 short int chan;
4873 int stat;
4874 short int iosb[4];
4875 int status;
4876 struct FAB to_fab = cc$rms_fab;
4877 struct NAM to_nam = cc$rms_nam;
4878 struct dsc$descriptor fib_d ={sizeof (fib),0,0,(char*) &fib};
4879 struct dsc$descriptor fib_attr[2]
4880 = {{sizeof (fab_final_pro),ATR$C_FPRO,0,(char*) &fab_final_pro},{0,0,0,0}};
4881 char to_esn[NAM$C_MAXRSS];
4882
4883 $DESCRIPTOR (disk,to_esn);
4884
4885 to_fab.fab$l_fna = to;
4886 to_fab.fab$b_fns = strlen (to);
4887 to_fab.fab$l_nam = &to_nam;
4888 to_fab.fab$l_fop = FAB$M_NAM;
4889
4890 to_nam.nam$l_esa = to_esn;
4891 to_nam.nam$b_ess = sizeof to_esn;
4892
4893 status = SYS$PARSE (&to_fab, 0, 0); /* figure out the full file name */
4894
4895 if (to_nam.nam$l_fnb && NAM$M_EXP_VER)
4896 *(to_nam.nam$l_ver) = '\0';
4897
4898 stat = rename (from, to_esn);
4899 if (stat < 0)
4900 return stat;
4901
4902 strcpy (vms_file_written, to_esn);
4903
4904 to_fab.fab$l_fna = vms_file_written; /* this points to the versionless name */
4905 to_fab.fab$b_fns = strlen (vms_file_written);
4906
4907 /* Now set the file protection to the correct value */
4908 SYS$OPEN (&to_fab, 0, 0); /* This fills in the nam$w_fid fields */
4909
4910 /* Copy these fields into the fib */
4911 fib.fib$r_fid_overlay.fib$w_fid[0] = to_nam.nam$w_fid[0];
4912 fib.fib$r_fid_overlay.fib$w_fid[1] = to_nam.nam$w_fid[1];
4913 fib.fib$r_fid_overlay.fib$w_fid[2] = to_nam.nam$w_fid[2];
4914
4915 SYS$CLOSE (&to_fab, 0, 0);
4916
4917 stat = SYS$ASSIGN (&disk, &chan, 0, 0); /* open a channel to the disk */
4918 if (!stat)
4919 LIB$SIGNAL (stat);
4920 stat = SYS$QIOW (0, chan, IO$_MODIFY, iosb, 0, 0, &fib_d,
4921 0, 0, 0, &fib_attr, 0);
4922 if (!stat)
4923 LIB$SIGNAL (stat);
4924 stat = SYS$DASSGN (chan);
4925 if (!stat)
4926 LIB$SIGNAL (stat);
4927 strcpy (vms_file_written, to_esn); /* We will write this to the terminal*/
4928 return 0;
4929 }
4930
4931 link (file, new)
4932 char * file, * new;
4933 {
4934 register status;
4935 struct FAB fab;
4936 struct NAM nam;
4937 unsigned short fid[3];
4938 char esa[NAM$C_MAXRSS];
4939
4940 fab = cc$rms_fab;
4941 fab.fab$l_fop = FAB$M_OFP;
4942 fab.fab$l_fna = file;
4943 fab.fab$b_fns = strlen (file);
4944 fab.fab$l_nam = &nam;
4945
4946 nam = cc$rms_nam;
4947 nam.nam$l_esa = esa;
4948 nam.nam$b_ess = NAM$C_MAXRSS;
4949
4950 status = SYS$PARSE (&fab);
4951 if ((status & 1) == 0)
4952 {
4953 errno = EVMSERR;
4954 vaxc$errno = status;
4955 return -1;
4956 }
4957 status = SYS$SEARCH (&fab);
4958 if ((status & 1) == 0)
4959 {
4960 errno = EVMSERR;
4961 vaxc$errno = status;
4962 return -1;
4963 }
4964
4965 fid[0] = nam.nam$w_fid[0];
4966 fid[1] = nam.nam$w_fid[1];
4967 fid[2] = nam.nam$w_fid[2];
4968
4969 fab.fab$l_fna = new;
4970 fab.fab$b_fns = strlen (new);
4971
4972 status = SYS$PARSE (&fab);
4973 if ((status & 1) == 0)
4974 {
4975 errno = EVMSERR;
4976 vaxc$errno = status;
4977 return -1;
4978 }
4979
4980 nam.nam$w_fid[0] = fid[0];
4981 nam.nam$w_fid[1] = fid[1];
4982 nam.nam$w_fid[2] = fid[2];
4983
4984 nam.nam$l_esa = nam.nam$l_name;
4985 nam.nam$b_esl = nam.nam$b_name + nam.nam$b_type + nam.nam$b_ver;
4986
4987 status = SYS$ENTER (&fab);
4988 if ((status & 1) == 0)
4989 {
4990 errno = EVMSERR;
4991 vaxc$errno = status;
4992 return -1;
4993 }
4994
4995 return 0;
4996 }
4997
4998 croak (badfunc)
4999 char *badfunc;
5000 {
5001 printf ("%s not yet implemented\r\n", badfunc);
5002 reset_sys_modes ();
5003 exit (1);
5004 }
5005
5006 long
5007 random ()
5008 {
5009 /* Arrange to return a range centered on zero. */
5010 return rand () - (1 << 30);
5011 }
5012
5013 srandom (seed)
5014 {
5015 srand (seed);
5016 }
5017 #endif /* VMS */
5018 \f
5019 #ifdef AIXHFT
5020
5021 /* Called from init_sys_modes. */
5022 hft_init ()
5023 {
5024 int junk;
5025
5026 /* If we're not on an HFT we shouldn't do any of this. We determine
5027 if we are on an HFT by trying to get an HFT error code. If this
5028 call fails, we're not on an HFT. */
5029 #ifdef IBMR2AIX
5030 if (ioctl (0, HFQERROR, &junk) < 0)
5031 return;
5032 #else /* not IBMR2AIX */
5033 if (ioctl (0, HFQEIO, 0) < 0)
5034 return;
5035 #endif /* not IBMR2AIX */
5036
5037 /* On AIX the default hft keyboard mapping uses backspace rather than delete
5038 as the rubout key's ASCII code. Here this is changed. The bug is that
5039 there's no way to determine the old mapping, so in reset_sys_modes
5040 we need to assume that the normal map had been present. Of course, this
5041 code also doesn't help if on a terminal emulator which doesn't understand
5042 HFT VTD's. */
5043 {
5044 struct hfbuf buf;
5045 struct hfkeymap keymap;
5046
5047 buf.hf_bufp = (char *)&keymap;
5048 buf.hf_buflen = sizeof (keymap);
5049 keymap.hf_nkeys = 2;
5050 keymap.hfkey[0].hf_kpos = 15;
5051 keymap.hfkey[0].hf_kstate = HFMAPCHAR | HFSHFNONE;
5052 #ifdef IBMR2AIX
5053 keymap.hfkey[0].hf_keyidh = '<';
5054 #else /* not IBMR2AIX */
5055 keymap.hfkey[0].hf_page = '<';
5056 #endif /* not IBMR2AIX */
5057 keymap.hfkey[0].hf_char = 127;
5058 keymap.hfkey[1].hf_kpos = 15;
5059 keymap.hfkey[1].hf_kstate = HFMAPCHAR | HFSHFSHFT;
5060 #ifdef IBMR2AIX
5061 keymap.hfkey[1].hf_keyidh = '<';
5062 #else /* not IBMR2AIX */
5063 keymap.hfkey[1].hf_page = '<';
5064 #endif /* not IBMR2AIX */
5065 keymap.hfkey[1].hf_char = 127;
5066 hftctl (0, HFSKBD, &buf);
5067 }
5068 /* The HFT system on AIX doesn't optimize for scrolling, so it's really ugly
5069 at times. */
5070 line_ins_del_ok = char_ins_del_ok = 0;
5071 }
5072
5073 /* Reset the rubout key to backspace. */
5074
5075 hft_reset ()
5076 {
5077 struct hfbuf buf;
5078 struct hfkeymap keymap;
5079 int junk;
5080
5081 #ifdef IBMR2AIX
5082 if (ioctl (0, HFQERROR, &junk) < 0)
5083 return;
5084 #else /* not IBMR2AIX */
5085 if (ioctl (0, HFQEIO, 0) < 0)
5086 return;
5087 #endif /* not IBMR2AIX */
5088
5089 buf.hf_bufp = (char *)&keymap;
5090 buf.hf_buflen = sizeof (keymap);
5091 keymap.hf_nkeys = 2;
5092 keymap.hfkey[0].hf_kpos = 15;
5093 keymap.hfkey[0].hf_kstate = HFMAPCHAR | HFSHFNONE;
5094 #ifdef IBMR2AIX
5095 keymap.hfkey[0].hf_keyidh = '<';
5096 #else /* not IBMR2AIX */
5097 keymap.hfkey[0].hf_page = '<';
5098 #endif /* not IBMR2AIX */
5099 keymap.hfkey[0].hf_char = 8;
5100 keymap.hfkey[1].hf_kpos = 15;
5101 keymap.hfkey[1].hf_kstate = HFMAPCHAR | HFSHFSHFT;
5102 #ifdef IBMR2AIX
5103 keymap.hfkey[1].hf_keyidh = '<';
5104 #else /* not IBMR2AIX */
5105 keymap.hfkey[1].hf_page = '<';
5106 #endif /* not IBMR2AIX */
5107 keymap.hfkey[1].hf_char = 8;
5108 hftctl (0, HFSKBD, &buf);
5109 }
5110
5111 #endif /* AIXHFT */
5112
5113 #ifdef USE_DL_STUBS
5114
5115 /* These are included on Sunos 4.1 when we do not use shared libraries.
5116 X11 libraries may refer to these functions but (we hope) do not
5117 actually call them. */
5118
5119 void *
5120 dlopen ()
5121 {
5122 return 0;
5123 }
5124
5125 void *
5126 dlsym ()
5127 {
5128 return 0;
5129 }
5130
5131 int
5132 dlclose ()
5133 {
5134 return -1;
5135 }
5136
5137 #endif /* USE_DL_STUBS */
5138 \f
5139 #ifndef BSTRING
5140
5141 #ifndef bzero
5142
5143 void
5144 bzero (b, length)
5145 register char *b;
5146 register int length;
5147 {
5148 #ifdef VMS
5149 short zero = 0;
5150 long max_str = 65535;
5151
5152 while (length > max_str) {
5153 (void) LIB$MOVC5 (&zero, &zero, &zero, &max_str, b);
5154 length -= max_str;
5155 b += max_str;
5156 }
5157 max_str = length;
5158 (void) LIB$MOVC5 (&zero, &zero, &zero, &max_str, b);
5159 #else
5160 while (length-- > 0)
5161 *b++ = 0;
5162 #endif /* not VMS */
5163 }
5164
5165 #endif /* no bzero */
5166 #endif /* BSTRING */
5167
5168 #if (!defined (BSTRING) && !defined (bcopy)) || defined (NEED_BCOPY)
5169 #undef bcopy
5170
5171 /* Saying `void' requires a declaration, above, where bcopy is used
5172 and that declaration causes pain for systems where bcopy is a macro. */
5173 bcopy (b1, b2, length)
5174 register char *b1;
5175 register char *b2;
5176 register int length;
5177 {
5178 #ifdef VMS
5179 long max_str = 65535;
5180
5181 while (length > max_str) {
5182 (void) LIB$MOVC3 (&max_str, b1, b2);
5183 length -= max_str;
5184 b1 += max_str;
5185 b2 += max_str;
5186 }
5187 max_str = length;
5188 (void) LIB$MOVC3 (&length, b1, b2);
5189 #else
5190 while (length-- > 0)
5191 *b2++ = *b1++;
5192 #endif /* not VMS */
5193 }
5194 #endif /* (defined (BSTRING) && !defined (bcopy)) || defined (NEED_BCOPY) */
5195
5196 #ifndef BSTRING
5197 #ifndef bcmp
5198 int
5199 bcmp (b1, b2, length) /* This could be a macro! */
5200 register char *b1;
5201 register char *b2;
5202 register int length;
5203 {
5204 #ifdef VMS
5205 struct dsc$descriptor_s src1 = {length, DSC$K_DTYPE_T, DSC$K_CLASS_S, b1};
5206 struct dsc$descriptor_s src2 = {length, DSC$K_DTYPE_T, DSC$K_CLASS_S, b2};
5207
5208 return STR$COMPARE (&src1, &src2);
5209 #else
5210 while (length-- > 0)
5211 if (*b1++ != *b2++)
5212 return 1;
5213
5214 return 0;
5215 #endif /* not VMS */
5216 }
5217 #endif /* no bcmp */
5218 #endif /* not BSTRING */
Unnamed repository; edit this file 'description' to name the repository.