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1 /* Interfaces to system-dependent kernel and library entries.
2 Copyright (C) 1985, 1986, 1987, 1988, 1993, 1994, 1995, 1999, 2000, 2001,
3 2002, 2003, 2004, 2005, 2006, 2007, 2008
4 Free Software Foundation, Inc.
5
6 This file is part of GNU Emacs.
7
8 GNU Emacs is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3, or (at your option)
11 any later version.
12
13 GNU Emacs is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with GNU Emacs; see the file COPYING. If not, write to
20 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
21 Boston, MA 02110-1301, USA. */
22
23 #ifdef HAVE_CONFIG_H
24 #include <config.h>
25 #endif
26
27 #include <signal.h>
28 #include <stdio.h>
29 #include <setjmp.h>
30 #ifdef HAVE_UNISTD_H
31 #include <unistd.h>
32 #endif
33 #include "lisp.h"
34 /* Including stdlib.h isn't necessarily enough to get srandom
35 declared, e.g. without __USE_XOPEN_EXTENDED with glibc 2. */
36 #ifdef HAVE_RANDOM
37 #if 0 /* It turns out that defining _OSF_SOURCE in osf5-0.h gets
38 random prototyped as returning `int'. It looks to me as
39 though the best way to DTRT is to prefer the rand48 functions
40 (per libc.info). -- fx */
41 extern long int random P_ ((void));
42 #endif
43 #if 0 /* Don't prototype srandom; it takes an unsigned argument on
44 some systems, and an unsigned long on others, like FreeBSD
45 4.1. */
46 extern void srandom P_ ((unsigned int));
47 #endif
48 #endif
49
50 #include "blockinput.h"
51
52 #ifdef MAC_OS8
53 #include <sys/param.h>
54
55 #ifndef subprocesses
56 /* Nonzero means delete a process right away if it exits (process.c). */
57 static int delete_exited_processes;
58 #endif
59 #endif /* MAC_OS8 */
60
61 #ifdef WINDOWSNT
62 #define read sys_read
63 #define write sys_write
64 #include <windows.h>
65 #ifndef NULL
66 #define NULL 0
67 #endif
68 #endif /* not WINDOWSNT */
69
70 /* Does anyone other than VMS need this? */
71 #ifndef fwrite
72 #define sys_fwrite fwrite
73 #else
74 #undef fwrite
75 #endif
76
77 #include <sys/types.h>
78 #include <sys/stat.h>
79 #include <errno.h>
80
81 #ifdef HAVE_SETPGID
82 #if !defined (USG) || defined (BSD_PGRPS)
83 #undef setpgrp
84 #define setpgrp setpgid
85 #endif
86 #endif
87
88 /* Get SI_SRPC_DOMAIN, if it is available. */
89 #ifdef HAVE_SYS_SYSTEMINFO_H
90 #include <sys/systeminfo.h>
91 #endif
92
93 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida, MW Aug 1993 */
94 #include <dos.h>
95 #include "dosfns.h"
96 #include "msdos.h"
97 #include <sys/param.h>
98
99 #if __DJGPP__ > 1
100 extern int etext;
101 extern unsigned start __asm__ ("start");
102 #endif
103 #endif
104
105 #ifndef USE_CRT_DLL
106 #ifndef errno
107 extern int errno;
108 #endif
109 #endif
110
111 #ifdef VMS
112 #include <rms.h>
113 #include <ttdef.h>
114 #include <tt2def.h>
115 #include <iodef.h>
116 #include <ssdef.h>
117 #include <descrip.h>
118 #include <fibdef.h>
119 #include <atrdef.h>
120 #include <ctype.h>
121 #include <string.h>
122 #ifdef __GNUC__
123 #include <sys/file.h>
124 #else
125 #include <file.h>
126 #endif
127 #undef F_SETFL
128 #ifndef RAB$C_BID
129 #include <rab.h>
130 #endif
131 #define MAXIOSIZE (32 * PAGESIZE) /* Don't I/O more than 32 blocks at a time */
132 #endif /* VMS */
133
134 #ifndef VMS
135 #include <sys/file.h>
136 #endif /* not VMS */
137
138 #ifdef HAVE_FCNTL_H
139 #include <fcntl.h>
140 #endif
141
142 #ifndef MSDOS
143 #include <sys/ioctl.h>
144 #endif
145
146 #include "systty.h"
147 #include "syswait.h"
148
149 #ifdef BROKEN_TIOCGWINSZ
150 #undef TIOCGWINSZ
151 #undef TIOCSWINSZ
152 #endif
153
154 #if defined (USG) || defined (DGUX)
155 #include <sys/utsname.h>
156 #ifndef MEMORY_IN_STRING_H
157 #include <memory.h>
158 #endif
159 #if defined (TIOCGWINSZ) || defined (ISC4_0)
160 #ifdef NEED_SIOCTL
161 #include <sys/sioctl.h>
162 #endif
163 #ifdef NEED_PTEM_H
164 #include <sys/stream.h>
165 #include <sys/ptem.h>
166 #endif
167 #endif /* TIOCGWINSZ or ISC4_0 */
168 #endif /* USG or DGUX */
169
170 extern int quit_char;
171
172 #include "keyboard.h"
173 #include "frame.h"
174 #include "window.h"
175 #include "termhooks.h"
176 #include "termchar.h"
177 #include "termopts.h"
178 #include "dispextern.h"
179 #include "process.h"
180
181 #ifdef WINDOWSNT
182 #include <direct.h>
183 /* In process.h which conflicts with the local copy. */
184 #define _P_WAIT 0
185 int _CRTAPI1 _spawnlp (int, const char *, const char *, ...);
186 int _CRTAPI1 _getpid (void);
187 extern char *getwd (char *);
188 #endif
189
190 #ifdef NONSYSTEM_DIR_LIBRARY
191 #include "ndir.h"
192 #endif /* NONSYSTEM_DIR_LIBRARY */
193
194 #include "syssignal.h"
195 #include "systime.h"
196 #ifdef HAVE_UTIME_H
197 #include <utime.h>
198 #endif
199
200 #ifndef HAVE_UTIMES
201 #ifndef HAVE_STRUCT_UTIMBUF
202 /* We want to use utime rather than utimes, but we couldn't find the
203 structure declaration. We'll use the traditional one. */
204 struct utimbuf {
205 long actime;
206 long modtime;
207 };
208 #endif
209 #endif
210
211 /* LPASS8 is new in 4.3, and makes cbreak mode provide all 8 bits. */
212 #ifndef LPASS8
213 #define LPASS8 0
214 #endif
215
216 #ifdef BSD4_1
217 #define LNOFLSH 0100000
218 #endif
219
220 static int baud_convert[] =
221 #ifdef BAUD_CONVERT
222 BAUD_CONVERT;
223 #else
224 {
225 0, 50, 75, 110, 135, 150, 200, 300, 600, 1200,
226 1800, 2400, 4800, 9600, 19200, 38400
227 };
228 #endif
229
230 #ifdef HAVE_SPEED_T
231 #include <termios.h>
232 #else
233 #if defined (HAVE_LIBNCURSES) && ! defined (NCURSES_OSPEED_T)
234 #else
235 #if defined (HAVE_TERMIOS_H) && defined (GNU_LINUX)
236 #include <termios.h>
237 #endif
238 #endif
239 #endif
240
241 int emacs_ospeed;
242
243 /* The file descriptor for Emacs's input terminal.
244 Under Unix, this is normally zero except when using X;
245 under VMS, we place the input channel number here. */
246 int input_fd;
247
248 void croak P_ ((char *)) NO_RETURN;
249
250 #ifdef AIXHFT
251 void hft_init ();
252 void hft_reset ();
253 #endif
254
255 /* Temporary used by `sigblock' when defined in terms of signprocmask. */
256
257 SIGMASKTYPE sigprocmask_set;
258
259
260 #if !defined (HAVE_GET_CURRENT_DIR_NAME) || defined (BROKEN_GET_CURRENT_DIR_NAME)
261
262 /* Return the current working directory. Returns NULL on errors.
263 Any other returned value must be freed with free. This is used
264 only when get_current_dir_name is not defined on the system. */
265 char*
266 get_current_dir_name ()
267 {
268 char *buf;
269 char *pwd;
270 struct stat dotstat, pwdstat;
271 /* If PWD is accurate, use it instead of calling getwd. PWD is
272 sometimes a nicer name, and using it may avoid a fatal error if a
273 parent directory is searchable but not readable. */
274 if ((pwd = getenv ("PWD")) != 0
275 && (IS_DIRECTORY_SEP (*pwd) || (*pwd && IS_DEVICE_SEP (pwd[1])))
276 && stat (pwd, &pwdstat) == 0
277 && stat (".", &dotstat) == 0
278 && dotstat.st_ino == pwdstat.st_ino
279 && dotstat.st_dev == pwdstat.st_dev
280 #ifdef MAXPATHLEN
281 && strlen (pwd) < MAXPATHLEN
282 #endif
283 )
284 {
285 buf = (char *) malloc (strlen (pwd) + 1);
286 if (!buf)
287 return NULL;
288 strcpy (buf, pwd);
289 }
290 #ifdef HAVE_GETCWD
291 else
292 {
293 size_t buf_size = 1024;
294 buf = (char *) malloc (buf_size);
295 if (!buf)
296 return NULL;
297 for (;;)
298 {
299 if (getcwd (buf, buf_size) == buf)
300 break;
301 if (errno != ERANGE)
302 {
303 int tmp_errno = errno;
304 free (buf);
305 errno = tmp_errno;
306 return NULL;
307 }
308 buf_size *= 2;
309 buf = (char *) realloc (buf, buf_size);
310 if (!buf)
311 return NULL;
312 }
313 }
314 #else
315 else
316 {
317 /* We need MAXPATHLEN here. */
318 buf = (char *) malloc (MAXPATHLEN + 1);
319 if (!buf)
320 return NULL;
321 if (getwd (buf) == NULL)
322 {
323 int tmp_errno = errno;
324 free (buf);
325 errno = tmp_errno;
326 return NULL;
327 }
328 }
329 #endif
330 return buf;
331 }
332 #endif
333
334 \f
335 /* Specify a different file descriptor for further input operations. */
336
337 void
338 change_input_fd (fd)
339 int fd;
340 {
341 input_fd = fd;
342 }
343
344 /* Discard pending input on descriptor input_fd. */
345
346 void
347 discard_tty_input ()
348 {
349 #ifndef WINDOWSNT
350 struct emacs_tty buf;
351
352 if (noninteractive)
353 return;
354
355 /* Discarding input is not safe when the input could contain
356 replies from the X server. So don't do it. */
357 if (read_socket_hook)
358 return;
359
360 #ifdef VMS
361 end_kbd_input ();
362 SYS$QIOW (0, input_fd, IO$_READVBLK|IO$M_PURGE, input_iosb, 0, 0,
363 &buf.main, 0, 0, terminator_mask, 0, 0);
364 queue_kbd_input ();
365 #else /* not VMS */
366 #ifdef APOLLO
367 {
368 int zero = 0;
369 ioctl (input_fd, TIOCFLUSH, &zero);
370 }
371 #else /* not Apollo */
372 #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */
373 while (dos_keyread () != -1)
374 ;
375 #else /* not MSDOS */
376 EMACS_GET_TTY (input_fd, &buf);
377 EMACS_SET_TTY (input_fd, &buf, 0);
378 #endif /* not MSDOS */
379 #endif /* not Apollo */
380 #endif /* not VMS */
381 #endif /* not WINDOWSNT */
382 }
383
384 #ifdef SIGTSTP
385
386 /* Arrange for character C to be read as the next input from
387 the terminal. */
388
389 void
390 #ifdef PROTOTYPES
391 stuff_char (char c)
392 #else
393 stuff_char (c)
394 char c;
395 #endif
396 {
397 if (read_socket_hook)
398 return;
399
400 /* Should perhaps error if in batch mode */
401 #ifdef TIOCSTI
402 ioctl (input_fd, TIOCSTI, &c);
403 #else /* no TIOCSTI */
404 error ("Cannot stuff terminal input characters in this version of Unix");
405 #endif /* no TIOCSTI */
406 }
407
408 #endif /* SIGTSTP */
409 \f
410 void
411 init_baud_rate ()
412 {
413 if (noninteractive)
414 emacs_ospeed = 0;
415 else
416 {
417 #ifdef INIT_BAUD_RATE
418 INIT_BAUD_RATE ();
419 #else
420 #ifdef DOS_NT
421 emacs_ospeed = 15;
422 #else /* not DOS_NT */
423 #ifdef VMS
424 struct sensemode sg;
425
426 SYS$QIOW (0, input_fd, IO$_SENSEMODE, &sg, 0, 0,
427 &sg.class, 12, 0, 0, 0, 0 );
428 emacs_ospeed = sg.xmit_baud;
429 #else /* not VMS */
430 #ifdef HAVE_TERMIOS
431 struct termios sg;
432
433 sg.c_cflag = B9600;
434 tcgetattr (input_fd, &sg);
435 emacs_ospeed = cfgetospeed (&sg);
436 #if defined (USE_GETOBAUD) && defined (getobaud)
437 /* m88k-motorola-sysv3 needs this (ghazi@noc.rutgers.edu) 9/1/94. */
438 if (emacs_ospeed == 0)
439 emacs_ospeed = getobaud (sg.c_cflag);
440 #endif
441 #else /* neither VMS nor TERMIOS */
442 #ifdef HAVE_TERMIO
443 struct termio sg;
444
445 sg.c_cflag = B9600;
446 #ifdef HAVE_TCATTR
447 tcgetattr (input_fd, &sg);
448 #else
449 ioctl (input_fd, TCGETA, &sg);
450 #endif
451 emacs_ospeed = sg.c_cflag & CBAUD;
452 #else /* neither VMS nor TERMIOS nor TERMIO */
453 struct sgttyb sg;
454
455 sg.sg_ospeed = B9600;
456 if (ioctl (input_fd, TIOCGETP, &sg) < 0)
457 abort ();
458 emacs_ospeed = sg.sg_ospeed;
459 #endif /* not HAVE_TERMIO */
460 #endif /* not HAVE_TERMIOS */
461 #endif /* not VMS */
462 #endif /* not DOS_NT */
463 #endif /* not INIT_BAUD_RATE */
464 }
465
466 baud_rate = (emacs_ospeed < sizeof baud_convert / sizeof baud_convert[0]
467 ? baud_convert[emacs_ospeed] : 9600);
468 if (baud_rate == 0)
469 baud_rate = 1200;
470 }
471
472 /*ARGSUSED*/
473 void
474 set_exclusive_use (fd)
475 int fd;
476 {
477 #ifdef FIOCLEX
478 ioctl (fd, FIOCLEX, 0);
479 #endif
480 /* Ok to do nothing if this feature does not exist */
481 }
482 \f
483 #ifndef subprocesses
484
485 wait_without_blocking ()
486 {
487 #ifdef BSD_SYSTEM
488 wait3 (0, WNOHANG | WUNTRACED, 0);
489 #else
490 croak ("wait_without_blocking");
491 #endif
492 synch_process_alive = 0;
493 }
494
495 #endif /* not subprocesses */
496
497 int wait_debugging; /* Set nonzero to make following function work under dbx
498 (at least for bsd). */
499
500 SIGTYPE
501 wait_for_termination_signal ()
502 {}
503
504 /* Wait for subprocess with process id `pid' to terminate and
505 make sure it will get eliminated (not remain forever as a zombie) */
506
507 void
508 wait_for_termination (pid)
509 int pid;
510 {
511 while (1)
512 {
513 #ifdef subprocesses
514 #ifdef VMS
515 int status;
516
517 status = SYS$FORCEX (&pid, 0, 0);
518 break;
519 #else /* not VMS */
520 #if defined (BSD_SYSTEM) || (defined (HPUX) && !defined (HPUX_5))
521 /* Note that kill returns -1 even if the process is just a zombie now.
522 But inevitably a SIGCHLD interrupt should be generated
523 and child_sig will do wait3 and make the process go away. */
524 /* There is some indication that there is a bug involved with
525 termination of subprocesses, perhaps involving a kernel bug too,
526 but no idea what it is. Just as a hunch we signal SIGCHLD to see
527 if that causes the problem to go away or get worse. */
528 sigsetmask (sigmask (SIGCHLD));
529 if (0 > kill (pid, 0))
530 {
531 sigsetmask (SIGEMPTYMASK);
532 kill (getpid (), SIGCHLD);
533 break;
534 }
535 if (wait_debugging)
536 sleep (1);
537 else
538 sigpause (SIGEMPTYMASK);
539 #else /* not BSD_SYSTEM, and not HPUX version >= 6 */
540 #if defined (UNIPLUS)
541 if (0 > kill (pid, 0))
542 break;
543 wait (0);
544 #else /* neither BSD_SYSTEM nor UNIPLUS: random sysV */
545 #ifdef POSIX_SIGNALS /* would this work for GNU/Linux as well? */
546 sigblock (sigmask (SIGCHLD));
547 errno = 0;
548 if (kill (pid, 0) == -1 && errno == ESRCH)
549 {
550 sigunblock (sigmask (SIGCHLD));
551 break;
552 }
553
554 sigsuspend (&empty_mask);
555 #else /* not POSIX_SIGNALS */
556 #ifdef HAVE_SYSV_SIGPAUSE
557 sighold (SIGCHLD);
558 if (0 > kill (pid, 0))
559 {
560 sigrelse (SIGCHLD);
561 break;
562 }
563 sigpause (SIGCHLD);
564 #else /* not HAVE_SYSV_SIGPAUSE */
565 #ifdef WINDOWSNT
566 wait (0);
567 break;
568 #else /* not WINDOWSNT */
569 if (0 > kill (pid, 0))
570 break;
571 /* Using sleep instead of pause avoids timing error.
572 If the inferior dies just before the sleep,
573 we lose just one second. */
574 sleep (1);
575 #endif /* not WINDOWSNT */
576 #endif /* not HAVE_SYSV_SIGPAUSE */
577 #endif /* not POSIX_SIGNALS */
578 #endif /* not UNIPLUS */
579 #endif /* not BSD_SYSTEM, and not HPUX version >= 6 */
580 #endif /* not VMS */
581 #else /* not subprocesses */
582 #if __DJGPP__ > 1
583 break;
584 #else /* not __DJGPP__ > 1 */
585 #ifndef BSD4_1
586 if (kill (pid, 0) < 0)
587 break;
588 wait (0);
589 #else /* BSD4_1 */
590 int status;
591 status = wait (0);
592 if (status == pid || status == -1)
593 break;
594 #endif /* BSD4_1 */
595 #endif /* not __DJGPP__ > 1*/
596 #endif /* not subprocesses */
597 }
598 }
599
600 #ifdef subprocesses
601
602 /*
603 * flush any pending output
604 * (may flush input as well; it does not matter the way we use it)
605 */
606
607 void
608 flush_pending_output (channel)
609 int channel;
610 {
611 #ifdef HAVE_TERMIOS
612 /* If we try this, we get hit with SIGTTIN, because
613 the child's tty belongs to the child's pgrp. */
614 #else
615 #ifdef TCFLSH
616 ioctl (channel, TCFLSH, 1);
617 #else
618 #ifdef TIOCFLUSH
619 int zero = 0;
620 /* 3rd arg should be ignored
621 but some 4.2 kernels actually want the address of an int
622 and nonzero means something different. */
623 ioctl (channel, TIOCFLUSH, &zero);
624 #endif
625 #endif
626 #endif
627 }
628 \f
629 #ifndef VMS
630 /* Set up the terminal at the other end of a pseudo-terminal that
631 we will be controlling an inferior through.
632 It should not echo or do line-editing, since that is done
633 in Emacs. No padding needed for insertion into an Emacs buffer. */
634
635 void
636 child_setup_tty (out)
637 int out;
638 {
639 #ifndef DOS_NT
640 struct emacs_tty s;
641
642 EMACS_GET_TTY (out, &s);
643
644 #if defined (HAVE_TERMIO) || defined (HAVE_TERMIOS)
645 s.main.c_oflag |= OPOST; /* Enable output postprocessing */
646 s.main.c_oflag &= ~ONLCR; /* Disable map of NL to CR-NL on output */
647 #ifdef NLDLY
648 s.main.c_oflag &= ~(NLDLY|CRDLY|TABDLY|BSDLY|VTDLY|FFDLY);
649 /* No output delays */
650 #endif
651 s.main.c_lflag &= ~ECHO; /* Disable echo */
652 s.main.c_lflag |= ISIG; /* Enable signals */
653 #if 0 /* This causes bugs in (for instance) telnet to certain sites. */
654 s.main.c_iflag &= ~ICRNL; /* Disable map of CR to NL on input */
655 #ifdef INLCR /* Just being cautious, since I can't check how
656 widespread INLCR is--rms. */
657 s.main.c_iflag &= ~INLCR; /* Disable map of NL to CR on input */
658 #endif
659 #endif
660 #ifdef IUCLC
661 s.main.c_iflag &= ~IUCLC; /* Disable downcasing on input. */
662 #endif
663 #ifdef ISTRIP
664 s.main.c_iflag &= ~ISTRIP; /* don't strip 8th bit on input */
665 #endif
666 #ifdef OLCUC
667 s.main.c_oflag &= ~OLCUC; /* Disable upcasing on output. */
668 #endif
669 s.main.c_oflag &= ~TAB3; /* Disable tab expansion */
670 s.main.c_cflag = (s.main.c_cflag & ~CSIZE) | CS8; /* Don't strip 8th bit */
671 #if 0
672 /* Said to be unnecessary: */
673 s.main.c_cc[VMIN] = 1; /* minimum number of characters to accept */
674 s.main.c_cc[VTIME] = 0; /* wait forever for at least 1 character */
675 #endif
676
677 s.main.c_lflag |= ICANON; /* Enable erase/kill and eof processing */
678 s.main.c_cc[VEOF] = 04; /* insure that EOF is Control-D */
679 s.main.c_cc[VERASE] = CDISABLE; /* disable erase processing */
680 s.main.c_cc[VKILL] = CDISABLE; /* disable kill processing */
681
682 #ifdef HPUX
683 s.main.c_cflag = (s.main.c_cflag & ~CBAUD) | B9600; /* baud rate sanity */
684 #endif /* HPUX */
685
686 #ifdef SIGNALS_VIA_CHARACTERS
687 /* the QUIT and INTR character are used in process_send_signal
688 so set them here to something useful. */
689 if (s.main.c_cc[VQUIT] == CDISABLE)
690 s.main.c_cc[VQUIT] = '\\'&037; /* Control-\ */
691 if (s.main.c_cc[VINTR] == CDISABLE)
692 s.main.c_cc[VINTR] = 'C'&037; /* Control-C */
693 #endif /* not SIGNALS_VIA_CHARACTERS */
694
695 #ifdef AIX
696 /* AIX enhanced edit loses NULs, so disable it */
697 #ifndef IBMR2AIX
698 s.main.c_line = 0;
699 s.main.c_iflag &= ~ASCEDIT;
700 #endif
701 /* Also, PTY overloads NUL and BREAK.
702 don't ignore break, but don't signal either, so it looks like NUL. */
703 s.main.c_iflag &= ~IGNBRK;
704 s.main.c_iflag &= ~BRKINT;
705 /* rms: Formerly it set s.main.c_cc[VINTR] to 0377 here
706 unconditionally. Then a SIGNALS_VIA_CHARACTERS conditional
707 would force it to 0377. That looks like duplicated code. */
708 #ifndef SIGNALS_VIA_CHARACTERS
709 /* QUIT and INTR work better as signals, so disable character forms */
710 s.main.c_cc[VQUIT] = CDISABLE;
711 s.main.c_cc[VINTR] = CDISABLE;
712 s.main.c_lflag &= ~ISIG;
713 #endif /* no TIOCGPGRP or no TIOCGLTC or no TIOCGETC */
714 s.main.c_cc[VEOL] = CDISABLE;
715 s.main.c_cflag = (s.main.c_cflag & ~CBAUD) | B9600; /* baud rate sanity */
716 #endif /* AIX */
717
718 #else /* not HAVE_TERMIO */
719
720 s.main.sg_flags &= ~(ECHO | CRMOD | ANYP | ALLDELAY | RAW | LCASE
721 | CBREAK | TANDEM);
722 s.main.sg_flags |= LPASS8;
723 s.main.sg_erase = 0377;
724 s.main.sg_kill = 0377;
725 s.lmode = LLITOUT | s.lmode; /* Don't strip 8th bit */
726
727 #endif /* not HAVE_TERMIO */
728
729 EMACS_SET_TTY (out, &s, 0);
730
731 #ifdef BSD4_1
732 if (interrupt_input)
733 reset_sigio ();
734 #endif /* BSD4_1 */
735 #ifdef RTU
736 {
737 int zero = 0;
738 ioctl (out, FIOASYNC, &zero);
739 }
740 #endif /* RTU */
741 #endif /* not DOS_NT */
742 }
743 #endif /* not VMS */
744
745 #endif /* subprocesses */
746 \f
747 /* Record a signal code and the handler for it. */
748 struct save_signal
749 {
750 int code;
751 SIGTYPE (*handler) P_ ((int));
752 };
753
754 static void save_signal_handlers P_ ((struct save_signal *));
755 static void restore_signal_handlers P_ ((struct save_signal *));
756
757 /* Suspend the Emacs process; give terminal to its superior. */
758
759 void
760 sys_suspend ()
761 {
762 #ifdef VMS
763 /* "Foster" parentage allows emacs to return to a subprocess that attached
764 to the current emacs as a cheaper than starting a whole new process. This
765 is set up by KEPTEDITOR.COM. */
766 unsigned long parent_id, foster_parent_id;
767 char *fpid_string;
768
769 fpid_string = getenv ("EMACS_PARENT_PID");
770 if (fpid_string != NULL)
771 {
772 sscanf (fpid_string, "%x", &foster_parent_id);
773 if (foster_parent_id != 0)
774 parent_id = foster_parent_id;
775 else
776 parent_id = getppid ();
777 }
778 else
779 parent_id = getppid ();
780
781 xfree (fpid_string); /* On VMS, this was malloc'd */
782
783 if (parent_id && parent_id != 0xffffffff)
784 {
785 SIGTYPE (*oldsig)() = (int) signal (SIGINT, SIG_IGN);
786 int status = LIB$ATTACH (&parent_id) & 1;
787 signal (SIGINT, oldsig);
788 return status;
789 }
790 else
791 {
792 struct {
793 int l;
794 char *a;
795 } d_prompt;
796 d_prompt.l = sizeof ("Emacs: "); /* Our special prompt */
797 d_prompt.a = "Emacs: "; /* Just a reminder */
798 LIB$SPAWN (0, 0, 0, 0, 0, 0, 0, 0, 0, 0, &d_prompt, 0);
799 return 1;
800 }
801 return -1;
802 #else
803 #if defined (SIGTSTP) && !defined (MSDOS)
804
805 {
806 int pgrp = EMACS_GETPGRP (0);
807 EMACS_KILLPG (pgrp, SIGTSTP);
808 }
809
810 #else /* No SIGTSTP */
811 #ifdef USG_JOBCTRL /* If you don't know what this is don't mess with it */
812 ptrace (0, 0, 0, 0); /* set for ptrace - caught by csh */
813 kill (getpid (), SIGQUIT);
814
815 #else /* No SIGTSTP or USG_JOBCTRL */
816
817 /* On a system where suspending is not implemented,
818 instead fork a subshell and let it talk directly to the terminal
819 while we wait. */
820 sys_subshell ();
821
822 #endif /* no USG_JOBCTRL */
823 #endif /* no SIGTSTP */
824 #endif /* not VMS */
825 }
826
827 /* Fork a subshell. */
828
829 #ifndef MAC_OS8
830 void
831 sys_subshell ()
832 {
833 #ifndef VMS
834 #ifdef DOS_NT /* Demacs 1.1.2 91/10/20 Manabu Higashida */
835 int st;
836 char oldwd[MAXPATHLEN+1]; /* Fixed length is safe on MSDOS. */
837 #endif
838 int pid;
839 struct save_signal saved_handlers[5];
840 Lisp_Object dir;
841 unsigned char *str = 0;
842 int len;
843
844 saved_handlers[0].code = SIGINT;
845 saved_handlers[1].code = SIGQUIT;
846 saved_handlers[2].code = SIGTERM;
847 #ifdef SIGIO
848 saved_handlers[3].code = SIGIO;
849 saved_handlers[4].code = 0;
850 #else
851 saved_handlers[3].code = 0;
852 #endif
853
854 /* Mentioning current_buffer->buffer would mean including buffer.h,
855 which somehow wedges the hp compiler. So instead... */
856
857 dir = intern ("default-directory");
858 if (NILP (Fboundp (dir)))
859 goto xyzzy;
860 dir = Fsymbol_value (dir);
861 if (!STRINGP (dir))
862 goto xyzzy;
863
864 dir = expand_and_dir_to_file (Funhandled_file_name_directory (dir), Qnil);
865 str = (unsigned char *) alloca (SCHARS (dir) + 2);
866 len = SCHARS (dir);
867 bcopy (SDATA (dir), str, len);
868 if (str[len - 1] != '/') str[len++] = '/';
869 str[len] = 0;
870 xyzzy:
871
872 #ifdef DOS_NT
873 pid = 0;
874 #if __DJGPP__ > 1
875 save_signal_handlers (saved_handlers);
876 synch_process_alive = 1;
877 #endif /* __DJGPP__ > 1 */
878 #else
879 pid = vfork ();
880 if (pid == -1)
881 error ("Can't spawn subshell");
882 #endif
883
884 if (pid == 0)
885 {
886 char *sh = 0;
887
888 #ifdef DOS_NT /* MW, Aug 1993 */
889 getwd (oldwd);
890 if (sh == 0)
891 sh = (char *) egetenv ("SUSPEND"); /* KFS, 1994-12-14 */
892 #endif
893 if (sh == 0)
894 sh = (char *) egetenv ("SHELL");
895 if (sh == 0)
896 sh = "sh";
897
898 /* Use our buffer's default directory for the subshell. */
899 if (str)
900 chdir ((char *) str);
901
902 #ifdef subprocesses
903 close_process_descs (); /* Close Emacs's pipes/ptys */
904 #endif
905
906 #ifdef SET_EMACS_PRIORITY
907 {
908 extern EMACS_INT emacs_priority;
909
910 if (emacs_priority < 0)
911 nice (-emacs_priority);
912 }
913 #endif
914
915 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */
916 {
917 char *epwd = getenv ("PWD");
918 char old_pwd[MAXPATHLEN+1+4];
919
920 /* If PWD is set, pass it with corrected value. */
921 if (epwd)
922 {
923 strcpy (old_pwd, epwd);
924 if (str[len - 1] == '/')
925 str[len - 1] = '\0';
926 setenv ("PWD", str, 1);
927 }
928 st = system (sh);
929 chdir (oldwd);
930 if (epwd)
931 putenv (old_pwd); /* restore previous value */
932 }
933 #if 0 /* This is also reported if last command executed in subshell failed, KFS */
934 if (st)
935 report_file_error ("Can't execute subshell", Fcons (build_string (sh), Qnil));
936 #endif
937 #else /* not MSDOS */
938 #ifdef WINDOWSNT
939 /* Waits for process completion */
940 pid = _spawnlp (_P_WAIT, sh, sh, NULL);
941 chdir (oldwd);
942 if (pid == -1)
943 write (1, "Can't execute subshell", 22);
944 #else /* not WINDOWSNT */
945 execlp (sh, sh, (char *) 0);
946 write (1, "Can't execute subshell", 22);
947 _exit (1);
948 #endif /* not WINDOWSNT */
949 #endif /* not MSDOS */
950 }
951
952 /* Do this now if we did not do it before. */
953 #if !defined (MSDOS) || __DJGPP__ == 1
954 save_signal_handlers (saved_handlers);
955 synch_process_alive = 1;
956 #endif
957
958 #ifndef DOS_NT
959 wait_for_termination (pid);
960 #endif
961 restore_signal_handlers (saved_handlers);
962 synch_process_alive = 0;
963 #endif /* !VMS */
964 }
965 #endif /* !MAC_OS8 */
966
967 static void
968 save_signal_handlers (saved_handlers)
969 struct save_signal *saved_handlers;
970 {
971 while (saved_handlers->code)
972 {
973 saved_handlers->handler
974 = (SIGTYPE (*) P_ ((int))) signal (saved_handlers->code, SIG_IGN);
975 saved_handlers++;
976 }
977 }
978
979 static void
980 restore_signal_handlers (saved_handlers)
981 struct save_signal *saved_handlers;
982 {
983 while (saved_handlers->code)
984 {
985 signal (saved_handlers->code, saved_handlers->handler);
986 saved_handlers++;
987 }
988 }
989 \f
990 #ifdef F_SETFL
991
992 int old_fcntl_flags;
993
994 void
995 init_sigio (fd)
996 int fd;
997 {
998 #ifdef FASYNC
999 old_fcntl_flags = fcntl (fd, F_GETFL, 0) & ~FASYNC;
1000 fcntl (fd, F_SETFL, old_fcntl_flags | FASYNC);
1001 #endif
1002 interrupts_deferred = 0;
1003 }
1004
1005 void
1006 reset_sigio ()
1007 {
1008 unrequest_sigio ();
1009 }
1010
1011 #ifdef FASYNC /* F_SETFL does not imply existence of FASYNC */
1012
1013 void
1014 request_sigio ()
1015 {
1016 if (noninteractive || read_socket_hook)
1017 return;
1018
1019 #ifdef SIGWINCH
1020 sigunblock (sigmask (SIGWINCH));
1021 #endif
1022 fcntl (input_fd, F_SETFL, old_fcntl_flags | FASYNC);
1023
1024 interrupts_deferred = 0;
1025 }
1026
1027 void
1028 unrequest_sigio ()
1029 {
1030 if (noninteractive || read_socket_hook)
1031 return;
1032
1033 #ifdef SIGWINCH
1034 sigblock (sigmask (SIGWINCH));
1035 #endif
1036 fcntl (input_fd, F_SETFL, old_fcntl_flags);
1037 interrupts_deferred = 1;
1038 }
1039
1040 #else /* no FASYNC */
1041 #ifdef STRIDE /* Stride doesn't have FASYNC - use FIOASYNC */
1042
1043 void
1044 request_sigio ()
1045 {
1046 int on = 1;
1047
1048 if (noninteractive || read_socket_hook)
1049 return;
1050
1051 ioctl (input_fd, FIOASYNC, &on);
1052 interrupts_deferred = 0;
1053 }
1054
1055 void
1056 unrequest_sigio ()
1057 {
1058 int off = 0;
1059
1060 if (noninteractive || read_socket_hook)
1061 return;
1062
1063 ioctl (input_fd, FIOASYNC, &off);
1064 interrupts_deferred = 1;
1065 }
1066
1067 #else /* not FASYNC, not STRIDE */
1068
1069 #ifdef _CX_UX
1070
1071 #include <termios.h>
1072
1073 void
1074 request_sigio ()
1075 {
1076 int on = 1;
1077 sigset_t st;
1078
1079 if (noninteractive || read_socket_hook)
1080 return;
1081
1082 sigemptyset (&st);
1083 sigaddset (&st, SIGIO);
1084 ioctl (input_fd, FIOASYNC, &on);
1085 interrupts_deferred = 0;
1086 sigprocmask (SIG_UNBLOCK, &st, (sigset_t *)0);
1087 }
1088
1089 void
1090 unrequest_sigio ()
1091 {
1092 int off = 0;
1093
1094 if (noninteractive || read_socket_hook)
1095 return;
1096
1097 ioctl (input_fd, FIOASYNC, &off);
1098 interrupts_deferred = 1;
1099 }
1100
1101 #else /* ! _CX_UX */
1102 #ifndef MSDOS
1103
1104 void
1105 request_sigio ()
1106 {
1107 if (noninteractive || read_socket_hook)
1108 return;
1109
1110 croak ("request_sigio");
1111 }
1112
1113 void
1114 unrequest_sigio ()
1115 {
1116 if (noninteractive || read_socket_hook)
1117 return;
1118
1119 croak ("unrequest_sigio");
1120 }
1121
1122 #endif /* MSDOS */
1123 #endif /* _CX_UX */
1124 #endif /* STRIDE */
1125 #endif /* FASYNC */
1126 #endif /* F_SETFL */
1127 \f
1128 /* Saving and restoring the process group of Emacs's terminal. */
1129
1130 #ifdef BSD_PGRPS
1131
1132 /* The process group of which Emacs was a member when it initially
1133 started.
1134
1135 If Emacs was in its own process group (i.e. inherited_pgroup ==
1136 getpid ()), then we know we're running under a shell with job
1137 control (Emacs would never be run as part of a pipeline).
1138 Everything is fine.
1139
1140 If Emacs was not in its own process group, then we know we're
1141 running under a shell (or a caller) that doesn't know how to
1142 separate itself from Emacs (like sh). Emacs must be in its own
1143 process group in order to receive SIGIO correctly. In this
1144 situation, we put ourselves in our own pgroup, forcibly set the
1145 tty's pgroup to our pgroup, and make sure to restore and reinstate
1146 the tty's pgroup just like any other terminal setting. If
1147 inherited_group was not the tty's pgroup, then we'll get a
1148 SIGTTmumble when we try to change the tty's pgroup, and a CONT if
1149 it goes foreground in the future, which is what should happen. */
1150 int inherited_pgroup;
1151
1152 /* Split off the foreground process group to Emacs alone.
1153 When we are in the foreground, but not started in our own process
1154 group, redirect the TTY to point to our own process group. We need
1155 to be in our own process group to receive SIGIO properly. */
1156 void
1157 narrow_foreground_group ()
1158 {
1159 int me = getpid ();
1160
1161 setpgrp (0, inherited_pgroup);
1162 if (inherited_pgroup != me)
1163 EMACS_SET_TTY_PGRP (input_fd, &me);
1164 setpgrp (0, me);
1165 }
1166
1167 /* Set the tty to our original foreground group. */
1168 void
1169 widen_foreground_group ()
1170 {
1171 if (inherited_pgroup != getpid ())
1172 EMACS_SET_TTY_PGRP (input_fd, &inherited_pgroup);
1173 setpgrp (0, inherited_pgroup);
1174 }
1175
1176 #endif /* BSD_PGRPS */
1177 \f
1178 /* Getting and setting emacs_tty structures. */
1179
1180 /* Set *TC to the parameters associated with the terminal FD.
1181 Return zero if all's well, or -1 if we ran into an error we
1182 couldn't deal with. */
1183 int
1184 emacs_get_tty (fd, settings)
1185 int fd;
1186 struct emacs_tty *settings;
1187 {
1188 /* Retrieve the primary parameters - baud rate, character size, etcetera. */
1189 #ifdef HAVE_TCATTR
1190 /* We have those nifty POSIX tcmumbleattr functions. */
1191 bzero (&settings->main, sizeof (settings->main));
1192 if (tcgetattr (fd, &settings->main) < 0)
1193 return -1;
1194
1195 #else
1196 #ifdef HAVE_TERMIO
1197 /* The SYSV-style interface? */
1198 if (ioctl (fd, TCGETA, &settings->main) < 0)
1199 return -1;
1200
1201 #else
1202 #ifdef VMS
1203 /* Vehemently Monstrous System? :-) */
1204 if (! (SYS$QIOW (0, fd, IO$_SENSEMODE, settings, 0, 0,
1205 &settings->main.class, 12, 0, 0, 0, 0)
1206 & 1))
1207 return -1;
1208
1209 #else
1210 #ifndef DOS_NT
1211 /* I give up - I hope you have the BSD ioctls. */
1212 if (ioctl (fd, TIOCGETP, &settings->main) < 0)
1213 return -1;
1214 #endif /* not DOS_NT */
1215 #endif
1216 #endif
1217 #endif
1218
1219 /* Suivant - Do we have to get struct ltchars data? */
1220 #ifdef HAVE_LTCHARS
1221 if (ioctl (fd, TIOCGLTC, &settings->ltchars) < 0)
1222 return -1;
1223 #endif
1224
1225 /* How about a struct tchars and a wordful of lmode bits? */
1226 #ifdef HAVE_TCHARS
1227 if (ioctl (fd, TIOCGETC, &settings->tchars) < 0
1228 || ioctl (fd, TIOCLGET, &settings->lmode) < 0)
1229 return -1;
1230 #endif
1231
1232 /* We have survived the tempest. */
1233 return 0;
1234 }
1235
1236
1237 /* Set the parameters of the tty on FD according to the contents of
1238 *SETTINGS. If FLUSHP is non-zero, we discard input.
1239 Return 0 if all went well, and -1 if anything failed. */
1240
1241 int
1242 emacs_set_tty (fd, settings, flushp)
1243 int fd;
1244 struct emacs_tty *settings;
1245 int flushp;
1246 {
1247 /* Set the primary parameters - baud rate, character size, etcetera. */
1248 #ifdef HAVE_TCATTR
1249 int i;
1250 /* We have those nifty POSIX tcmumbleattr functions.
1251 William J. Smith <wjs@wiis.wang.com> writes:
1252 "POSIX 1003.1 defines tcsetattr to return success if it was
1253 able to perform any of the requested actions, even if some
1254 of the requested actions could not be performed.
1255 We must read settings back to ensure tty setup properly.
1256 AIX requires this to keep tty from hanging occasionally." */
1257 /* This make sure that we don't loop indefinitely in here. */
1258 for (i = 0 ; i < 10 ; i++)
1259 if (tcsetattr (fd, flushp ? TCSAFLUSH : TCSADRAIN, &settings->main) < 0)
1260 {
1261 if (errno == EINTR)
1262 continue;
1263 else
1264 return -1;
1265 }
1266 else
1267 {
1268 struct termios new;
1269
1270 bzero (&new, sizeof (new));
1271 /* Get the current settings, and see if they're what we asked for. */
1272 tcgetattr (fd, &new);
1273 /* We cannot use memcmp on the whole structure here because under
1274 * aix386 the termios structure has some reserved field that may
1275 * not be filled in.
1276 */
1277 if ( new.c_iflag == settings->main.c_iflag
1278 && new.c_oflag == settings->main.c_oflag
1279 && new.c_cflag == settings->main.c_cflag
1280 && new.c_lflag == settings->main.c_lflag
1281 && memcmp (new.c_cc, settings->main.c_cc, NCCS) == 0)
1282 break;
1283 else
1284 continue;
1285 }
1286
1287 #else
1288 #ifdef HAVE_TERMIO
1289 /* The SYSV-style interface? */
1290 if (ioctl (fd, flushp ? TCSETAF : TCSETAW, &settings->main) < 0)
1291 return -1;
1292
1293 #else
1294 #ifdef VMS
1295 /* Vehemently Monstrous System? :-) */
1296 if (! (SYS$QIOW (0, fd, IO$_SETMODE, &input_iosb, 0, 0,
1297 &settings->main.class, 12, 0, 0, 0, 0)
1298 & 1))
1299 return -1;
1300
1301 #else
1302 #ifndef DOS_NT
1303 /* I give up - I hope you have the BSD ioctls. */
1304 if (ioctl (fd, (flushp) ? TIOCSETP : TIOCSETN, &settings->main) < 0)
1305 return -1;
1306 #endif /* not DOS_NT */
1307
1308 #endif
1309 #endif
1310 #endif
1311
1312 /* Suivant - Do we have to get struct ltchars data? */
1313 #ifdef HAVE_LTCHARS
1314 if (ioctl (fd, TIOCSLTC, &settings->ltchars) < 0)
1315 return -1;
1316 #endif
1317
1318 /* How about a struct tchars and a wordful of lmode bits? */
1319 #ifdef HAVE_TCHARS
1320 if (ioctl (fd, TIOCSETC, &settings->tchars) < 0
1321 || ioctl (fd, TIOCLSET, &settings->lmode) < 0)
1322 return -1;
1323 #endif
1324
1325 /* We have survived the tempest. */
1326 return 0;
1327 }
1328
1329 \f
1330 /* The initial tty mode bits */
1331 struct emacs_tty old_tty;
1332
1333 /* 1 if we have been through init_sys_modes. */
1334 int term_initted;
1335
1336 /* 1 if outer tty status has been recorded. */
1337 int old_tty_valid;
1338
1339 #ifdef BSD4_1
1340 /* BSD 4.1 needs to keep track of the lmode bits in order to start
1341 sigio. */
1342 int lmode;
1343 #endif
1344
1345 #ifndef F_SETOWN_BUG
1346 #ifdef F_SETOWN
1347 int old_fcntl_owner;
1348 #endif /* F_SETOWN */
1349 #endif /* F_SETOWN_BUG */
1350
1351 /* This may also be defined in stdio,
1352 but if so, this does no harm,
1353 and using the same name avoids wasting the other one's space. */
1354
1355 #ifdef nec_ews_svr4
1356 extern char *_sobuf ;
1357 #else
1358 #if defined (USG) || defined (DGUX)
1359 unsigned char _sobuf[BUFSIZ+8];
1360 #else
1361 char _sobuf[BUFSIZ];
1362 #endif
1363 #endif
1364
1365 #ifdef HAVE_LTCHARS
1366 static struct ltchars new_ltchars = {-1,-1,-1,-1,-1,-1};
1367 #endif
1368 #ifdef HAVE_TCHARS
1369 static struct tchars new_tchars = {-1,-1,-1,-1,-1,-1};
1370 #endif
1371
1372 void
1373 init_sys_modes ()
1374 {
1375 struct emacs_tty tty;
1376
1377 #ifdef VMS
1378 #if 0
1379 static int oob_chars[2] = {0, 1 << 7}; /* catch C-g's */
1380 extern int (*interrupt_signal) ();
1381 #endif
1382 #endif
1383
1384 Vtty_erase_char = Qnil;
1385
1386 if (noninteractive)
1387 return;
1388
1389 #ifdef VMS
1390 if (!input_ef)
1391 input_ef = get_kbd_event_flag ();
1392 /* LIB$GET_EF (&input_ef); */
1393 SYS$CLREF (input_ef);
1394 waiting_for_ast = 0;
1395 if (!timer_ef)
1396 timer_ef = get_timer_event_flag ();
1397 /* LIB$GET_EF (&timer_ef); */
1398 SYS$CLREF (timer_ef);
1399 #if 0
1400 if (!process_ef)
1401 {
1402 LIB$GET_EF (&process_ef);
1403 SYS$CLREF (process_ef);
1404 }
1405 if (input_ef / 32 != process_ef / 32)
1406 croak ("Input and process event flags in different clusters.");
1407 #endif
1408 if (input_ef / 32 != timer_ef / 32)
1409 croak ("Input and timer event flags in different clusters.");
1410 #if 0
1411 input_eflist = ((unsigned) 1 << (input_ef % 32)) |
1412 ((unsigned) 1 << (process_ef % 32));
1413 #endif
1414 timer_eflist = ((unsigned) 1 << (input_ef % 32)) |
1415 ((unsigned) 1 << (timer_ef % 32));
1416 #ifndef VMS4_4
1417 sys_access_reinit ();
1418 #endif
1419 #endif /* not VMS */
1420
1421 #ifdef BSD_PGRPS
1422 if (! read_socket_hook && EQ (Vwindow_system, Qnil))
1423 narrow_foreground_group ();
1424 #endif
1425
1426 #ifdef HAVE_WINDOW_SYSTEM
1427 /* Emacs' window system on MSDOG uses the `internal terminal' and therefore
1428 needs the initialization code below. */
1429 if (!read_socket_hook && EQ (Vwindow_system, Qnil))
1430 #endif
1431 {
1432 EMACS_GET_TTY (input_fd, &old_tty);
1433
1434 old_tty_valid = 1;
1435
1436 tty = old_tty;
1437
1438 #if defined (HAVE_TERMIO) || defined (HAVE_TERMIOS)
1439 XSETINT (Vtty_erase_char, old_tty.main.c_cc[VERASE]);
1440
1441 #ifdef DGUX
1442 /* This allows meta to be sent on 8th bit. */
1443 tty.main.c_iflag &= ~INPCK; /* don't check input for parity */
1444 #endif
1445 tty.main.c_iflag |= (IGNBRK); /* Ignore break condition */
1446 tty.main.c_iflag &= ~ICRNL; /* Disable map of CR to NL on input */
1447 #ifdef INLCR /* I'm just being cautious,
1448 since I can't check how widespread INLCR is--rms. */
1449 tty.main.c_iflag &= ~INLCR; /* Disable map of NL to CR on input */
1450 #endif
1451 #ifdef ISTRIP
1452 tty.main.c_iflag &= ~ISTRIP; /* don't strip 8th bit on input */
1453 #endif
1454 tty.main.c_lflag &= ~ECHO; /* Disable echo */
1455 tty.main.c_lflag &= ~ICANON; /* Disable erase/kill processing */
1456 #ifdef IEXTEN
1457 tty.main.c_lflag &= ~IEXTEN; /* Disable other editing characters. */
1458 #endif
1459 tty.main.c_lflag |= ISIG; /* Enable signals */
1460 if (flow_control)
1461 {
1462 tty.main.c_iflag |= IXON; /* Enable start/stop output control */
1463 #ifdef IXANY
1464 tty.main.c_iflag &= ~IXANY;
1465 #endif /* IXANY */
1466 }
1467 else
1468 tty.main.c_iflag &= ~IXON; /* Disable start/stop output control */
1469 tty.main.c_oflag &= ~ONLCR; /* Disable map of NL to CR-NL
1470 on output */
1471 tty.main.c_oflag &= ~TAB3; /* Disable tab expansion */
1472 #ifdef CS8
1473 if (meta_key)
1474 {
1475 tty.main.c_cflag |= CS8; /* allow 8th bit on input */
1476 tty.main.c_cflag &= ~PARENB;/* Don't check parity */
1477 }
1478 #endif
1479 tty.main.c_cc[VINTR] = quit_char; /* C-g (usually) gives SIGINT */
1480 /* Set up C-g for both SIGQUIT and SIGINT.
1481 We don't know which we will get, but we handle both alike
1482 so which one it really gives us does not matter. */
1483 tty.main.c_cc[VQUIT] = quit_char;
1484 tty.main.c_cc[VMIN] = 1; /* Input should wait for at least 1 char */
1485 tty.main.c_cc[VTIME] = 0; /* no matter how long that takes. */
1486 #ifdef VSWTCH
1487 tty.main.c_cc[VSWTCH] = CDISABLE; /* Turn off shell layering use
1488 of C-z */
1489 #endif /* VSWTCH */
1490
1491 #if defined (mips) || defined (HAVE_TCATTR)
1492 #ifdef VSUSP
1493 tty.main.c_cc[VSUSP] = CDISABLE; /* Turn off mips handling of C-z. */
1494 #endif /* VSUSP */
1495 #ifdef V_DSUSP
1496 tty.main.c_cc[V_DSUSP] = CDISABLE; /* Turn off mips handling of C-y. */
1497 #endif /* V_DSUSP */
1498 #ifdef VDSUSP /* Some systems have VDSUSP, some have V_DSUSP. */
1499 tty.main.c_cc[VDSUSP] = CDISABLE;
1500 #endif /* VDSUSP */
1501 #ifdef VLNEXT
1502 tty.main.c_cc[VLNEXT] = CDISABLE;
1503 #endif /* VLNEXT */
1504 #ifdef VREPRINT
1505 tty.main.c_cc[VREPRINT] = CDISABLE;
1506 #endif /* VREPRINT */
1507 #ifdef VWERASE
1508 tty.main.c_cc[VWERASE] = CDISABLE;
1509 #endif /* VWERASE */
1510 #ifdef VDISCARD
1511 tty.main.c_cc[VDISCARD] = CDISABLE;
1512 #endif /* VDISCARD */
1513
1514 if (flow_control)
1515 {
1516 #ifdef VSTART
1517 tty.main.c_cc[VSTART] = '\021';
1518 #endif /* VSTART */
1519 #ifdef VSTOP
1520 tty.main.c_cc[VSTOP] = '\023';
1521 #endif /* VSTOP */
1522 }
1523 else
1524 {
1525 #ifdef VSTART
1526 tty.main.c_cc[VSTART] = CDISABLE;
1527 #endif /* VSTART */
1528 #ifdef VSTOP
1529 tty.main.c_cc[VSTOP] = CDISABLE;
1530 #endif /* VSTOP */
1531 }
1532 #endif /* mips or HAVE_TCATTR */
1533
1534 #ifdef SET_LINE_DISCIPLINE
1535 /* Need to explicitly request TERMIODISC line discipline or
1536 Ultrix's termios does not work correctly. */
1537 tty.main.c_line = SET_LINE_DISCIPLINE;
1538 #endif
1539 #ifdef AIX
1540 #ifndef IBMR2AIX
1541 /* AIX enhanced edit loses NULs, so disable it. */
1542 tty.main.c_line = 0;
1543 tty.main.c_iflag &= ~ASCEDIT;
1544 #else
1545 tty.main.c_cc[VSTRT] = CDISABLE;
1546 tty.main.c_cc[VSTOP] = CDISABLE;
1547 tty.main.c_cc[VSUSP] = CDISABLE;
1548 tty.main.c_cc[VDSUSP] = CDISABLE;
1549 #endif /* IBMR2AIX */
1550 if (flow_control)
1551 {
1552 #ifdef VSTART
1553 tty.main.c_cc[VSTART] = '\021';
1554 #endif /* VSTART */
1555 #ifdef VSTOP
1556 tty.main.c_cc[VSTOP] = '\023';
1557 #endif /* VSTOP */
1558 }
1559 /* Also, PTY overloads NUL and BREAK.
1560 don't ignore break, but don't signal either, so it looks like NUL.
1561 This really serves a purpose only if running in an XTERM window
1562 or via TELNET or the like, but does no harm elsewhere. */
1563 tty.main.c_iflag &= ~IGNBRK;
1564 tty.main.c_iflag &= ~BRKINT;
1565 #endif
1566 #else /* if not HAVE_TERMIO */
1567 #ifdef VMS
1568 tty.main.tt_char |= TT$M_NOECHO;
1569 if (meta_key)
1570 tty.main.tt_char |= TT$M_EIGHTBIT;
1571 if (flow_control)
1572 tty.main.tt_char |= TT$M_TTSYNC;
1573 else
1574 tty.main.tt_char &= ~TT$M_TTSYNC;
1575 tty.main.tt2_char |= TT2$M_PASTHRU | TT2$M_XON;
1576 #else /* not VMS (BSD, that is) */
1577 #ifndef DOS_NT
1578 XSETINT (Vtty_erase_char, tty.main.sg_erase);
1579 tty.main.sg_flags &= ~(ECHO | CRMOD | XTABS);
1580 if (meta_key)
1581 tty.main.sg_flags |= ANYP;
1582 tty.main.sg_flags |= interrupt_input ? RAW : CBREAK;
1583 #endif /* not DOS_NT */
1584 #endif /* not VMS (BSD, that is) */
1585 #endif /* not HAVE_TERMIO */
1586
1587 /* If going to use CBREAK mode, we must request C-g to interrupt
1588 and turn off start and stop chars, etc. If not going to use
1589 CBREAK mode, do this anyway so as to turn off local flow
1590 control for user coming over network on 4.2; in this case,
1591 only t_stopc and t_startc really matter. */
1592 #ifndef HAVE_TERMIO
1593 #ifdef HAVE_TCHARS
1594 /* Note: if not using CBREAK mode, it makes no difference how we
1595 set this */
1596 tty.tchars = new_tchars;
1597 tty.tchars.t_intrc = quit_char;
1598 if (flow_control)
1599 {
1600 tty.tchars.t_startc = '\021';
1601 tty.tchars.t_stopc = '\023';
1602 }
1603
1604 tty.lmode = LDECCTQ | LLITOUT | LPASS8 | LNOFLSH | old_tty.lmode;
1605 #ifdef ultrix
1606 /* Under Ultrix 4.2a, leaving this out doesn't seem to hurt
1607 anything, and leaving it in breaks the meta key. Go figure. */
1608 tty.lmode &= ~LLITOUT;
1609 #endif
1610
1611 #ifdef BSD4_1
1612 lmode = tty.lmode;
1613 #endif
1614
1615 #endif /* HAVE_TCHARS */
1616 #endif /* not HAVE_TERMIO */
1617
1618 #ifdef HAVE_LTCHARS
1619 tty.ltchars = new_ltchars;
1620 #endif /* HAVE_LTCHARS */
1621 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida, MW Aug 1993 */
1622 if (!term_initted)
1623 internal_terminal_init ();
1624 dos_ttraw ();
1625 #endif
1626
1627 EMACS_SET_TTY (input_fd, &tty, 0);
1628
1629 /* This code added to insure that, if flow-control is not to be used,
1630 we have an unlocked terminal at the start. */
1631
1632 #ifdef TCXONC
1633 if (!flow_control) ioctl (input_fd, TCXONC, 1);
1634 #endif
1635 #ifndef APOLLO
1636 #ifdef TIOCSTART
1637 if (!flow_control) ioctl (input_fd, TIOCSTART, 0);
1638 #endif
1639 #endif
1640
1641 #if defined (HAVE_TERMIOS) || defined (HPUX9)
1642 #ifdef TCOON
1643 if (!flow_control) tcflow (input_fd, TCOON);
1644 #endif
1645 #endif
1646
1647 #ifdef AIXHFT
1648 hft_init ();
1649 #ifdef IBMR2AIX
1650 {
1651 /* IBM's HFT device usually thinks a ^J should be LF/CR. We need it
1652 to be only LF. This is the way that is done. */
1653 struct termio tty;
1654
1655 if (ioctl (1, HFTGETID, &tty) != -1)
1656 write (1, "\033[20l", 5);
1657 }
1658 #endif
1659 #endif /* AIXHFT */
1660
1661 #ifdef VMS
1662 /* Appears to do nothing when in PASTHRU mode.
1663 SYS$QIOW (0, input_fd, IO$_SETMODE|IO$M_OUTBAND, 0, 0, 0,
1664 interrupt_signal, oob_chars, 0, 0, 0, 0);
1665 */
1666 queue_kbd_input (0);
1667 #endif /* VMS */
1668 }
1669
1670 #ifdef F_SETFL
1671 #ifndef F_SETOWN_BUG
1672 #ifdef F_GETOWN /* F_SETFL does not imply existence of F_GETOWN */
1673 if (interrupt_input
1674 && ! read_socket_hook && EQ (Vwindow_system, Qnil))
1675 {
1676 old_fcntl_owner = fcntl (input_fd, F_GETOWN, 0);
1677 fcntl (input_fd, F_SETOWN, getpid ());
1678 init_sigio (input_fd);
1679 }
1680 #endif /* F_GETOWN */
1681 #endif /* F_SETOWN_BUG */
1682 #endif /* F_SETFL */
1683
1684 #ifdef BSD4_1
1685 if (interrupt_input)
1686 init_sigio (input_fd);
1687 #endif
1688
1689 #ifdef VMS /* VMS sometimes has this symbol but lacks setvbuf. */
1690 #undef _IOFBF
1691 #endif
1692 #ifdef _IOFBF
1693 /* This symbol is defined on recent USG systems.
1694 Someone says without this call USG won't really buffer the file
1695 even with a call to setbuf. */
1696 setvbuf (stdout, (char *) _sobuf, _IOFBF, sizeof _sobuf);
1697 #else
1698 setbuf (stdout, (char *) _sobuf);
1699 #endif
1700 #ifdef HAVE_WINDOW_SYSTEM
1701 /* Emacs' window system on MSDOG uses the `internal terminal' and therefore
1702 needs the initialization code below. */
1703 if (EQ (Vwindow_system, Qnil)
1704 #ifndef WINDOWSNT
1705 /* When running in tty mode on NT/Win95, we have a read_socket
1706 hook, but still need the rest of the initialization code below. */
1707 && (! read_socket_hook)
1708 #endif
1709 )
1710 #endif
1711 set_terminal_modes ();
1712
1713 if (!term_initted
1714 && FRAMEP (Vterminal_frame)
1715 && FRAME_TERMCAP_P (XFRAME (Vterminal_frame)))
1716 init_frame_faces (XFRAME (Vterminal_frame));
1717
1718 if (term_initted && no_redraw_on_reenter)
1719 {
1720 if (display_completed)
1721 direct_output_forward_char (0);
1722 }
1723 else
1724 {
1725 frame_garbaged = 1;
1726 if (FRAMEP (Vterminal_frame))
1727 FRAME_GARBAGED_P (XFRAME (Vterminal_frame)) = 1;
1728 }
1729
1730 term_initted = 1;
1731 }
1732
1733 /* Return nonzero if safe to use tabs in output.
1734 At the time this is called, init_sys_modes has not been done yet. */
1735
1736 int
1737 tabs_safe_p ()
1738 {
1739 struct emacs_tty tty;
1740
1741 EMACS_GET_TTY (input_fd, &tty);
1742 return EMACS_TTY_TABS_OK (&tty);
1743 }
1744 \f
1745 /* Get terminal size from system.
1746 Store number of lines into *HEIGHTP and width into *WIDTHP.
1747 We store 0 if there's no valid information. */
1748
1749 void
1750 get_frame_size (widthp, heightp)
1751 int *widthp, *heightp;
1752 {
1753
1754 #ifdef TIOCGWINSZ
1755
1756 /* BSD-style. */
1757 struct winsize size;
1758
1759 if (ioctl (input_fd, TIOCGWINSZ, &size) == -1)
1760 *widthp = *heightp = 0;
1761 else
1762 {
1763 *widthp = size.ws_col;
1764 *heightp = size.ws_row;
1765 }
1766
1767 #else
1768 #ifdef TIOCGSIZE
1769
1770 /* SunOS - style. */
1771 struct ttysize size;
1772
1773 if (ioctl (input_fd, TIOCGSIZE, &size) == -1)
1774 *widthp = *heightp = 0;
1775 else
1776 {
1777 *widthp = size.ts_cols;
1778 *heightp = size.ts_lines;
1779 }
1780
1781 #else
1782 #ifdef VMS
1783
1784 /* Use a fresh channel since the current one may have stale info
1785 (for example, from prior to a suspend); and to avoid a dependency
1786 in the init sequence. */
1787 int chan;
1788 struct sensemode tty;
1789
1790 SYS$ASSIGN (&input_dsc, &chan, 0, 0);
1791 SYS$QIOW (0, chan, IO$_SENSEMODE, &tty, 0, 0,
1792 &tty.class, 12, 0, 0, 0, 0);
1793 SYS$DASSGN (chan);
1794 *widthp = tty.scr_wid;
1795 *heightp = tty.scr_len;
1796
1797 #else
1798 #ifdef MSDOS
1799 *widthp = ScreenCols ();
1800 *heightp = ScreenRows ();
1801 #else /* system doesn't know size */
1802 *widthp = 0;
1803 *heightp = 0;
1804 #endif
1805
1806 #endif /* not VMS */
1807 #endif /* not SunOS-style */
1808 #endif /* not BSD-style */
1809 }
1810
1811 /* Set the logical window size associated with descriptor FD
1812 to HEIGHT and WIDTH. This is used mainly with ptys. */
1813
1814 int
1815 set_window_size (fd, height, width)
1816 int fd, height, width;
1817 {
1818 #ifdef TIOCSWINSZ
1819
1820 /* BSD-style. */
1821 struct winsize size;
1822 size.ws_row = height;
1823 size.ws_col = width;
1824
1825 if (ioctl (fd, TIOCSWINSZ, &size) == -1)
1826 return 0; /* error */
1827 else
1828 return 1;
1829
1830 #else
1831 #ifdef TIOCSSIZE
1832
1833 /* SunOS - style. */
1834 struct ttysize size;
1835 size.ts_lines = height;
1836 size.ts_cols = width;
1837
1838 if (ioctl (fd, TIOCGSIZE, &size) == -1)
1839 return 0;
1840 else
1841 return 1;
1842 #else
1843 return -1;
1844 #endif /* not SunOS-style */
1845 #endif /* not BSD-style */
1846 }
1847
1848 \f
1849 /* Prepare the terminal for exiting Emacs; move the cursor to the
1850 bottom of the frame, turn off interrupt-driven I/O, etc. */
1851 void
1852 reset_sys_modes ()
1853 {
1854 struct frame *sf;
1855
1856 if (noninteractive)
1857 {
1858 fflush (stdout);
1859 return;
1860 }
1861 if (!term_initted)
1862 return;
1863 #ifdef HAVE_WINDOW_SYSTEM
1864 /* Emacs' window system on MSDOG uses the `internal terminal' and therefore
1865 needs the clean-up code below. */
1866 if (!EQ (Vwindow_system, Qnil)
1867 #ifndef WINDOWSNT
1868 /* When running in tty mode on NT/Win95, we have a read_socket
1869 hook, but still need the rest of the clean-up code below. */
1870 || read_socket_hook
1871 #endif
1872 )
1873 return;
1874 #endif
1875 sf = SELECTED_FRAME ();
1876 cursor_to (FRAME_LINES (sf) - 1, 0);
1877 clear_end_of_line (FRAME_COLS (sf));
1878 /* clear_end_of_line may move the cursor */
1879 cursor_to (FRAME_LINES (sf) - 1, 0);
1880 #if defined (IBMR2AIX) && defined (AIXHFT)
1881 {
1882 /* HFT devices normally use ^J as a LF/CR. We forced it to
1883 do the LF only. Now, we need to reset it. */
1884 struct termio tty;
1885
1886 if (ioctl (1, HFTGETID, &tty) != -1)
1887 write (1, "\033[20h", 5);
1888 }
1889 #endif
1890
1891 reset_terminal_modes ();
1892 fflush (stdout);
1893 #ifdef BSD_SYSTEM
1894 #ifndef BSD4_1
1895 /* Avoid possible loss of output when changing terminal modes. */
1896 fsync (fileno (stdout));
1897 #endif
1898 #endif
1899
1900 #ifdef F_SETFL
1901 #ifndef F_SETOWN_BUG
1902 #ifdef F_SETOWN /* F_SETFL does not imply existence of F_SETOWN */
1903 if (interrupt_input)
1904 {
1905 reset_sigio ();
1906 fcntl (input_fd, F_SETOWN, old_fcntl_owner);
1907 }
1908 #endif /* F_SETOWN */
1909 #endif /* F_SETOWN_BUG */
1910 #ifdef O_NDELAY
1911 fcntl (input_fd, F_SETFL, fcntl (input_fd, F_GETFL, 0) & ~O_NDELAY);
1912 #endif
1913 #endif /* F_SETFL */
1914 #ifdef BSD4_1
1915 if (interrupt_input)
1916 reset_sigio ();
1917 #endif /* BSD4_1 */
1918
1919 if (old_tty_valid)
1920 while (EMACS_SET_TTY (input_fd, &old_tty, 0) < 0 && errno == EINTR)
1921 ;
1922
1923 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */
1924 dos_ttcooked ();
1925 #endif
1926
1927 #ifdef SET_LINE_DISCIPLINE
1928 /* Ultrix's termios *ignores* any line discipline except TERMIODISC.
1929 A different old line discipline is therefore not restored, yet.
1930 Restore the old line discipline by hand. */
1931 ioctl (0, TIOCSETD, &old_tty.main.c_line);
1932 #endif
1933
1934 #ifdef AIXHFT
1935 hft_reset ();
1936 #endif
1937
1938 #ifdef BSD_PGRPS
1939 widen_foreground_group ();
1940 #endif
1941 }
1942 \f
1943 #ifdef HAVE_PTYS
1944
1945 /* Set up the proper status flags for use of a pty. */
1946
1947 void
1948 setup_pty (fd)
1949 int fd;
1950 {
1951 /* I'm told that TOICREMOTE does not mean control chars
1952 "can't be sent" but rather that they don't have
1953 input-editing or signaling effects.
1954 That should be good, because we have other ways
1955 to do those things in Emacs.
1956 However, telnet mode seems not to work on 4.2.
1957 So TIOCREMOTE is turned off now. */
1958
1959 /* Under hp-ux, if TIOCREMOTE is turned on, some calls
1960 will hang. In particular, the "timeout" feature (which
1961 causes a read to return if there is no data available)
1962 does this. Also it is known that telnet mode will hang
1963 in such a way that Emacs must be stopped (perhaps this
1964 is the same problem).
1965
1966 If TIOCREMOTE is turned off, then there is a bug in
1967 hp-ux which sometimes loses data. Apparently the
1968 code which blocks the master process when the internal
1969 buffer fills up does not work. Other than this,
1970 though, everything else seems to work fine.
1971
1972 Since the latter lossage is more benign, we may as well
1973 lose that way. -- cph */
1974 #ifdef FIONBIO
1975 #if defined(SYSV_PTYS) || defined(UNIX98_PTYS)
1976 {
1977 int on = 1;
1978 ioctl (fd, FIONBIO, &on);
1979 }
1980 #endif
1981 #endif
1982 #ifdef IBMRTAIX
1983 /* On AIX, the parent gets SIGHUP when a pty attached child dies. So, we */
1984 /* ignore SIGHUP once we've started a child on a pty. Note that this may */
1985 /* cause EMACS not to die when it should, i.e., when its own controlling */
1986 /* tty goes away. I've complained to the AIX developers, and they may */
1987 /* change this behavior, but I'm not going to hold my breath. */
1988 signal (SIGHUP, SIG_IGN);
1989 #endif
1990 }
1991 #endif /* HAVE_PTYS */
1992 \f
1993 #ifdef VMS
1994
1995 /* Assigning an input channel is done at the start of Emacs execution.
1996 This is called each time Emacs is resumed, also, but does nothing
1997 because input_chain is no longer zero. */
1998
1999 void
2000 init_vms_input ()
2001 {
2002 int status;
2003
2004 if (input_fd == 0)
2005 {
2006 status = SYS$ASSIGN (&input_dsc, &input_fd, 0, 0);
2007 if (! (status & 1))
2008 LIB$STOP (status);
2009 }
2010 }
2011
2012 /* Deassigning the input channel is done before exiting. */
2013
2014 void
2015 stop_vms_input ()
2016 {
2017 return SYS$DASSGN (input_fd);
2018 }
2019
2020 short input_buffer;
2021
2022 /* Request reading one character into the keyboard buffer.
2023 This is done as soon as the buffer becomes empty. */
2024
2025 void
2026 queue_kbd_input ()
2027 {
2028 int status;
2029 extern kbd_input_ast ();
2030
2031 waiting_for_ast = 0;
2032 stop_input = 0;
2033 status = SYS$QIO (0, input_fd, IO$_READVBLK,
2034 &input_iosb, kbd_input_ast, 1,
2035 &input_buffer, 1, 0, terminator_mask, 0, 0);
2036 }
2037
2038 int input_count;
2039
2040 /* Ast routine that is called when keyboard input comes in
2041 in accord with the SYS$QIO above. */
2042
2043 void
2044 kbd_input_ast ()
2045 {
2046 register int c = -1;
2047 int old_errno = errno;
2048 extern EMACS_TIME *input_available_clear_time;
2049
2050 if (waiting_for_ast)
2051 SYS$SETEF (input_ef);
2052 waiting_for_ast = 0;
2053 input_count++;
2054 #ifdef ASTDEBUG
2055 if (input_count == 25)
2056 exit (1);
2057 printf ("Ast # %d,", input_count);
2058 printf (" iosb = %x, %x, %x, %x",
2059 input_iosb.offset, input_iosb.status, input_iosb.termlen,
2060 input_iosb.term);
2061 #endif
2062 if (input_iosb.offset)
2063 {
2064 c = input_buffer;
2065 #ifdef ASTDEBUG
2066 printf (", char = 0%o", c);
2067 #endif
2068 }
2069 #ifdef ASTDEBUG
2070 printf ("\n");
2071 fflush (stdout);
2072 sleep (1);
2073 #endif
2074 if (! stop_input)
2075 queue_kbd_input ();
2076 if (c >= 0)
2077 {
2078 struct input_event e;
2079 EVENT_INIT (e);
2080
2081 e.kind = ASCII_KEYSTROKE_EVENT;
2082 XSETINT (e.code, c);
2083 e.frame_or_window = selected_frame;
2084 kbd_buffer_store_event (&e);
2085 }
2086 if (input_available_clear_time)
2087 EMACS_SET_SECS_USECS (*input_available_clear_time, 0, 0);
2088 errno = old_errno;
2089 }
2090
2091 /* Wait until there is something in kbd_buffer. */
2092
2093 void
2094 wait_for_kbd_input ()
2095 {
2096 extern int have_process_input, process_exited;
2097
2098 /* If already something, avoid doing system calls. */
2099 if (detect_input_pending ())
2100 {
2101 return;
2102 }
2103 /* Clear a flag, and tell ast routine above to set it. */
2104 SYS$CLREF (input_ef);
2105 waiting_for_ast = 1;
2106 /* Check for timing error: ast happened while we were doing that. */
2107 if (!detect_input_pending ())
2108 {
2109 /* No timing error: wait for flag to be set. */
2110 set_waiting_for_input (0);
2111 SYS$WFLOR (input_ef, input_eflist);
2112 clear_waiting_for_input ();
2113 if (!detect_input_pending ())
2114 /* Check for subprocess input availability */
2115 {
2116 int dsp = have_process_input || process_exited;
2117
2118 SYS$CLREF (process_ef);
2119 if (have_process_input)
2120 process_command_input ();
2121 if (process_exited)
2122 process_exit ();
2123 if (dsp)
2124 {
2125 update_mode_lines++;
2126 prepare_menu_bars ();
2127 redisplay_preserve_echo_area (18);
2128 }
2129 }
2130 }
2131 waiting_for_ast = 0;
2132 }
2133
2134 /* Get rid of any pending QIO, when we are about to suspend
2135 or when we want to throw away pending input.
2136 We wait for a positive sign that the AST routine has run
2137 and therefore there is no I/O request queued when we return.
2138 SYS$SETAST is used to avoid a timing error. */
2139
2140 void
2141 end_kbd_input ()
2142 {
2143 #ifdef ASTDEBUG
2144 printf ("At end_kbd_input.\n");
2145 fflush (stdout);
2146 sleep (1);
2147 #endif
2148 if (LIB$AST_IN_PROG ()) /* Don't wait if suspending from kbd_buffer_store_event! */
2149 {
2150 SYS$CANCEL (input_fd);
2151 return;
2152 }
2153
2154 SYS$SETAST (0);
2155 /* Clear a flag, and tell ast routine above to set it. */
2156 SYS$CLREF (input_ef);
2157 waiting_for_ast = 1;
2158 stop_input = 1;
2159 SYS$CANCEL (input_fd);
2160 SYS$SETAST (1);
2161 SYS$WAITFR (input_ef);
2162 waiting_for_ast = 0;
2163 }
2164
2165 /* Wait for either input available or time interval expiry. */
2166
2167 void
2168 input_wait_timeout (timeval)
2169 int timeval; /* Time to wait, in seconds */
2170 {
2171 int time [2];
2172 static int zero = 0;
2173 static int large = -10000000;
2174
2175 LIB$EMUL (&timeval, &large, &zero, time); /* Convert to VMS format */
2176
2177 /* If already something, avoid doing system calls. */
2178 if (detect_input_pending ())
2179 {
2180 return;
2181 }
2182 /* Clear a flag, and tell ast routine above to set it. */
2183 SYS$CLREF (input_ef);
2184 waiting_for_ast = 1;
2185 /* Check for timing error: ast happened while we were doing that. */
2186 if (!detect_input_pending ())
2187 {
2188 /* No timing error: wait for flag to be set. */
2189 SYS$CANTIM (1, 0);
2190 if (SYS$SETIMR (timer_ef, time, 0, 1) & 1) /* Set timer */
2191 SYS$WFLOR (timer_ef, timer_eflist); /* Wait for timer expiry or input */
2192 }
2193 waiting_for_ast = 0;
2194 }
2195
2196 /* The standard `sleep' routine works some other way
2197 and it stops working if you have ever quit out of it.
2198 This one continues to work. */
2199
2200 sys_sleep (timeval)
2201 int timeval;
2202 {
2203 int time [2];
2204 static int zero = 0;
2205 static int large = -10000000;
2206
2207 LIB$EMUL (&timeval, &large, &zero, time); /* Convert to VMS format */
2208
2209 SYS$CANTIM (1, 0);
2210 if (SYS$SETIMR (timer_ef, time, 0, 1) & 1) /* Set timer */
2211 SYS$WAITFR (timer_ef); /* Wait for timer expiry only */
2212 }
2213
2214 void
2215 init_sigio (fd)
2216 int fd;
2217 {
2218 request_sigio ();
2219 }
2220
2221 reset_sigio ()
2222 {
2223 unrequest_sigio ();
2224 }
2225
2226 void
2227 request_sigio ()
2228 {
2229 if (noninteractive)
2230 return;
2231 croak ("request sigio");
2232 }
2233
2234 void
2235 unrequest_sigio ()
2236 {
2237 if (noninteractive)
2238 return;
2239 croak ("unrequest sigio");
2240 }
2241
2242 #endif /* VMS */
2243 \f
2244 /* Note that VMS compiler won't accept defined (CANNOT_DUMP). */
2245 #ifndef CANNOT_DUMP
2246 #define NEED_STARTS
2247 #endif
2248
2249 #ifndef SYSTEM_MALLOC
2250 #ifndef NEED_STARTS
2251 #define NEED_STARTS
2252 #endif
2253 #endif
2254
2255 #ifdef NEED_STARTS
2256 /* Some systems that cannot dump also cannot implement these. */
2257
2258 /*
2259 * Return the address of the start of the text segment prior to
2260 * doing an unexec. After unexec the return value is undefined.
2261 * See crt0.c for further explanation and _start.
2262 *
2263 */
2264
2265 #if !(defined (__NetBSD__) && defined (__ELF__))
2266 #ifndef HAVE_TEXT_START
2267 char *
2268 start_of_text ()
2269 {
2270 #ifdef TEXT_START
2271 return ((char *) TEXT_START);
2272 #else
2273 #ifdef GOULD
2274 extern csrt ();
2275 return ((char *) csrt);
2276 #else /* not GOULD */
2277 extern int _start ();
2278 return ((char *) _start);
2279 #endif /* GOULD */
2280 #endif /* TEXT_START */
2281 }
2282 #endif /* not HAVE_TEXT_START */
2283 #endif
2284
2285 /*
2286 * Return the address of the start of the data segment prior to
2287 * doing an unexec. After unexec the return value is undefined.
2288 * See crt0.c for further information and definition of data_start.
2289 *
2290 * Apparently, on BSD systems this is etext at startup. On
2291 * USG systems (swapping) this is highly mmu dependent and
2292 * is also dependent on whether or not the program is running
2293 * with shared text. Generally there is a (possibly large)
2294 * gap between end of text and start of data with shared text.
2295 *
2296 * On Uniplus+ systems with shared text, data starts at a
2297 * fixed address. Each port (from a given oem) is generally
2298 * different, and the specific value of the start of data can
2299 * be obtained via the UniPlus+ specific "uvar" system call,
2300 * however the method outlined in crt0.c seems to be more portable.
2301 *
2302 * Probably what will have to happen when a USG unexec is available,
2303 * at least on UniPlus, is temacs will have to be made unshared so
2304 * that text and data are contiguous. Then once loadup is complete,
2305 * unexec will produce a shared executable where the data can be
2306 * at the normal shared text boundary and the startofdata variable
2307 * will be patched by unexec to the correct value.
2308 *
2309 */
2310
2311 #ifndef start_of_data
2312 char *
2313 start_of_data ()
2314 {
2315 #ifdef DATA_START
2316 return ((char *) DATA_START);
2317 #else
2318 #ifdef ORDINARY_LINK
2319 /*
2320 * This is a hack. Since we're not linking crt0.c or pre_crt0.c,
2321 * data_start isn't defined. We take the address of environ, which
2322 * is known to live at or near the start of the system crt0.c, and
2323 * we don't sweat the handful of bytes that might lose.
2324 */
2325 extern char **environ;
2326
2327 return ((char *) &environ);
2328 #else
2329 extern int data_start;
2330 return ((char *) &data_start);
2331 #endif /* ORDINARY_LINK */
2332 #endif /* DATA_START */
2333 }
2334 #endif /* start_of_data */
2335 #endif /* NEED_STARTS (not CANNOT_DUMP or not SYSTEM_MALLOC) */
2336 \f
2337 /* init_system_name sets up the string for the Lisp function
2338 system-name to return. */
2339
2340 #ifdef BSD4_1
2341 #include <whoami.h>
2342 #endif
2343
2344 extern Lisp_Object Vsystem_name;
2345
2346 #ifndef BSD4_1
2347 #ifndef VMS
2348 #ifdef HAVE_SOCKETS
2349 #include <sys/socket.h>
2350 #include <netdb.h>
2351 #endif /* HAVE_SOCKETS */
2352 #endif /* not VMS */
2353 #endif /* not BSD4_1 */
2354
2355 #ifdef TRY_AGAIN
2356 #ifndef HAVE_H_ERRNO
2357 extern int h_errno;
2358 #endif
2359 #endif /* TRY_AGAIN */
2360
2361 void
2362 init_system_name ()
2363 {
2364 #ifdef BSD4_1
2365 Vsystem_name = build_string (sysname);
2366 #else
2367 #ifdef VMS
2368 char *sp, *end;
2369 if ((sp = egetenv ("SYS$NODE")) == 0)
2370 Vsystem_name = build_string ("vax-vms");
2371 else if ((end = index (sp, ':')) == 0)
2372 Vsystem_name = build_string (sp);
2373 else
2374 Vsystem_name = make_string (sp, end - sp);
2375 #else
2376 #ifndef HAVE_GETHOSTNAME
2377 struct utsname uts;
2378 uname (&uts);
2379 Vsystem_name = build_string (uts.nodename);
2380 #else /* HAVE_GETHOSTNAME */
2381 unsigned int hostname_size = 256;
2382 char *hostname = (char *) alloca (hostname_size);
2383
2384 /* Try to get the host name; if the buffer is too short, try
2385 again. Apparently, the only indication gethostname gives of
2386 whether the buffer was large enough is the presence or absence
2387 of a '\0' in the string. Eech. */
2388 for (;;)
2389 {
2390 gethostname (hostname, hostname_size - 1);
2391 hostname[hostname_size - 1] = '\0';
2392
2393 /* Was the buffer large enough for the '\0'? */
2394 if (strlen (hostname) < hostname_size - 1)
2395 break;
2396
2397 hostname_size <<= 1;
2398 hostname = (char *) alloca (hostname_size);
2399 }
2400 #ifdef HAVE_SOCKETS
2401 /* Turn the hostname into the official, fully-qualified hostname.
2402 Don't do this if we're going to dump; this can confuse system
2403 libraries on some machines and make the dumped emacs core dump. */
2404 #ifndef CANNOT_DUMP
2405 if (initialized)
2406 #endif /* not CANNOT_DUMP */
2407 if (! index (hostname, '.'))
2408 {
2409 struct hostent *hp;
2410 int count;
2411 for (count = 0;; count++)
2412 {
2413 #ifdef TRY_AGAIN
2414 h_errno = 0;
2415 #endif
2416 hp = gethostbyname (hostname);
2417 #ifdef TRY_AGAIN
2418 if (! (hp == 0 && h_errno == TRY_AGAIN))
2419 #endif
2420 break;
2421 if (count >= 5)
2422 break;
2423 Fsleep_for (make_number (1), Qnil);
2424 }
2425 if (hp)
2426 {
2427 char *fqdn = (char *) hp->h_name;
2428 #if 0
2429 char *p;
2430 #endif
2431
2432 if (!index (fqdn, '.'))
2433 {
2434 /* We still don't have a fully qualified domain name.
2435 Try to find one in the list of alternate names */
2436 char **alias = hp->h_aliases;
2437 while (*alias
2438 && (!index (*alias, '.')
2439 || !strcmp (*alias, "localhost.localdomain")))
2440 alias++;
2441 if (*alias)
2442 fqdn = *alias;
2443 }
2444 hostname = fqdn;
2445 #if 0
2446 /* Convert the host name to lower case. */
2447 /* Using ctype.h here would introduce a possible locale
2448 dependence that is probably wrong for hostnames. */
2449 p = hostname;
2450 while (*p)
2451 {
2452 if (*p >= 'A' && *p <= 'Z')
2453 *p += 'a' - 'A';
2454 p++;
2455 }
2456 #endif
2457 }
2458 }
2459 #endif /* HAVE_SOCKETS */
2460 /* We used to try using getdomainname here,
2461 but NIIBE Yutaka <gniibe@etl.go.jp> says that
2462 getdomainname gets the NIS/YP domain which often is not the same
2463 as in Internet domain name. */
2464 #if 0 /* Turned off because sysinfo is not really likely to return the
2465 correct Internet domain. */
2466 #if (HAVE_SYSINFO && defined (SI_SRPC_DOMAIN))
2467 if (! index (hostname, '.'))
2468 {
2469 /* The hostname is not fully qualified. Append the domain name. */
2470
2471 int hostlen = strlen (hostname);
2472 int domain_size = 256;
2473
2474 for (;;)
2475 {
2476 char *domain = (char *) alloca (domain_size + 1);
2477 char *fqdn = (char *) alloca (hostlen + 1 + domain_size + 1);
2478 int sys_domain_size = sysinfo (SI_SRPC_DOMAIN, domain, domain_size);
2479 if (sys_domain_size <= 0)
2480 break;
2481 if (domain_size < sys_domain_size)
2482 {
2483 domain_size = sys_domain_size;
2484 continue;
2485 }
2486 strcpy (fqdn, hostname);
2487 if (domain[0] == '.')
2488 strcpy (fqdn + hostlen, domain);
2489 else if (domain[0] != 0)
2490 {
2491 fqdn[hostlen] = '.';
2492 strcpy (fqdn + hostlen + 1, domain);
2493 }
2494 hostname = fqdn;
2495 break;
2496 }
2497 }
2498 #endif /* HAVE_SYSINFO && defined (SI_SRPC_DOMAIN) */
2499 #endif /* 0 */
2500 Vsystem_name = build_string (hostname);
2501 #endif /* HAVE_GETHOSTNAME */
2502 #endif /* VMS */
2503 #endif /* BSD4_1 */
2504 {
2505 unsigned char *p;
2506 for (p = SDATA (Vsystem_name); *p; p++)
2507 if (*p == ' ' || *p == '\t')
2508 *p = '-';
2509 }
2510 }
2511 \f
2512 #ifndef MSDOS
2513 #ifndef VMS
2514 #if !defined (HAVE_SELECT) || defined (BROKEN_SELECT_NON_X)
2515
2516 #include "sysselect.h"
2517 #undef select
2518
2519 #if defined (HAVE_X_WINDOWS) && !defined (HAVE_SELECT)
2520 /* Cause explanatory error message at compile time,
2521 since the select emulation is not good enough for X. */
2522 int *x = &x_windows_lose_if_no_select_system_call;
2523 #endif
2524
2525 /* Emulate as much as select as is possible under 4.1 and needed by Gnu Emacs
2526 * Only checks read descriptors.
2527 */
2528 /* How long to wait between checking fds in select */
2529 #define SELECT_PAUSE 1
2530 int select_alarmed;
2531
2532 /* For longjmp'ing back to read_input_waiting. */
2533
2534 jmp_buf read_alarm_throw;
2535
2536 /* Nonzero if the alarm signal should throw back to read_input_waiting.
2537 The read_socket_hook function sets this to 1 while it is waiting. */
2538
2539 int read_alarm_should_throw;
2540
2541 SIGTYPE
2542 select_alarm ()
2543 {
2544 select_alarmed = 1;
2545 #ifdef BSD4_1
2546 sigrelse (SIGALRM);
2547 #else /* not BSD4_1 */
2548 signal (SIGALRM, SIG_IGN);
2549 #endif /* not BSD4_1 */
2550 SIGNAL_THREAD_CHECK (SIGALRM);
2551 if (read_alarm_should_throw)
2552 longjmp (read_alarm_throw, 1);
2553 }
2554
2555 #ifndef WINDOWSNT
2556 /* Only rfds are checked. */
2557 int
2558 sys_select (nfds, rfds, wfds, efds, timeout)
2559 int nfds;
2560 SELECT_TYPE *rfds, *wfds, *efds;
2561 EMACS_TIME *timeout;
2562 {
2563 int ravail = 0;
2564 SELECT_TYPE orfds;
2565 int timeoutval;
2566 int *local_timeout;
2567 extern int proc_buffered_char[];
2568 #ifndef subprocesses
2569 int process_tick = 0, update_tick = 0;
2570 #else
2571 extern int process_tick, update_tick;
2572 #endif
2573 unsigned char buf;
2574
2575 #if defined (HAVE_SELECT) && defined (HAVE_X_WINDOWS)
2576 /* If we're using X, then the native select will work; we only need the
2577 emulation for non-X usage. */
2578 if (!NILP (Vwindow_system))
2579 return select (nfds, rfds, wfds, efds, timeout);
2580 #endif
2581 timeoutval = timeout ? EMACS_SECS (*timeout) : 100000;
2582 local_timeout = &timeoutval;
2583 FD_ZERO (&orfds);
2584 if (rfds)
2585 {
2586 orfds = *rfds;
2587 FD_ZERO (rfds);
2588 }
2589 if (wfds)
2590 FD_ZERO (wfds);
2591 if (efds)
2592 FD_ZERO (efds);
2593
2594 /* If we are looking only for the terminal, with no timeout,
2595 just read it and wait -- that's more efficient. */
2596 if (*local_timeout == 100000 && process_tick == update_tick
2597 && FD_ISSET (0, &orfds))
2598 {
2599 int fd;
2600 for (fd = 1; fd < nfds; ++fd)
2601 if (FD_ISSET (fd, &orfds))
2602 goto hardway;
2603 if (! detect_input_pending ())
2604 read_input_waiting ();
2605 FD_SET (0, rfds);
2606 return 1;
2607 }
2608
2609 hardway:
2610 /* Once a second, till the timer expires, check all the flagged read
2611 * descriptors to see if any input is available. If there is some then
2612 * set the corresponding bit in the return copy of rfds.
2613 */
2614 while (1)
2615 {
2616 register int to_check, fd;
2617
2618 if (rfds)
2619 {
2620 for (to_check = nfds, fd = 0; --to_check >= 0; fd++)
2621 {
2622 if (FD_ISSET (fd, &orfds))
2623 {
2624 int avail = 0, status = 0;
2625
2626 if (fd == 0)
2627 avail = detect_input_pending (); /* Special keyboard handler */
2628 else
2629 {
2630 #ifdef FIONREAD
2631 status = ioctl (fd, FIONREAD, &avail);
2632 #else /* no FIONREAD */
2633 /* Hoping it will return -1 if nothing available
2634 or 0 if all 0 chars requested are read. */
2635 if (proc_buffered_char[fd] >= 0)
2636 avail = 1;
2637 else
2638 {
2639 avail = read (fd, &buf, 1);
2640 if (avail > 0)
2641 proc_buffered_char[fd] = buf;
2642 }
2643 #endif /* no FIONREAD */
2644 }
2645 if (status >= 0 && avail > 0)
2646 {
2647 FD_SET (fd, rfds);
2648 ravail++;
2649 }
2650 }
2651 }
2652 }
2653 if (*local_timeout == 0 || ravail != 0 || process_tick != update_tick)
2654 break;
2655
2656 turn_on_atimers (0);
2657 signal (SIGALRM, select_alarm);
2658 select_alarmed = 0;
2659 alarm (SELECT_PAUSE);
2660
2661 /* Wait for a SIGALRM (or maybe a SIGTINT) */
2662 while (select_alarmed == 0 && *local_timeout != 0
2663 && process_tick == update_tick)
2664 {
2665 /* If we are interested in terminal input,
2666 wait by reading the terminal.
2667 That makes instant wakeup for terminal input at least. */
2668 if (FD_ISSET (0, &orfds))
2669 {
2670 read_input_waiting ();
2671 if (detect_input_pending ())
2672 select_alarmed = 1;
2673 }
2674 else
2675 pause ();
2676 }
2677 (*local_timeout) -= SELECT_PAUSE;
2678
2679 /* Reset the old alarm if there was one. */
2680 turn_on_atimers (1);
2681
2682 if (*local_timeout == 0) /* Stop on timer being cleared */
2683 break;
2684 }
2685 return ravail;
2686 }
2687 #endif /* not WINDOWSNT */
2688
2689 /* Read keyboard input into the standard buffer,
2690 waiting for at least one character. */
2691
2692 void
2693 read_input_waiting ()
2694 {
2695 int nread, i;
2696 extern int quit_char;
2697
2698 if (read_socket_hook)
2699 {
2700 struct input_event hold_quit;
2701
2702 EVENT_INIT (hold_quit);
2703 hold_quit.kind = NO_EVENT;
2704
2705 read_alarm_should_throw = 0;
2706 if (! setjmp (read_alarm_throw))
2707 nread = (*read_socket_hook) (0, 1, &hold_quit);
2708 else
2709 nread = -1;
2710
2711 if (hold_quit.kind != NO_EVENT)
2712 kbd_buffer_store_event (&hold_quit);
2713 }
2714 else
2715 {
2716 struct input_event e;
2717 char buf[3];
2718 nread = read (fileno (stdin), buf, 1);
2719 EVENT_INIT (e);
2720
2721 /* Scan the chars for C-g and store them in kbd_buffer. */
2722 e.kind = ASCII_KEYSTROKE_EVENT;
2723 e.frame_or_window = selected_frame;
2724 e.modifiers = 0;
2725 for (i = 0; i < nread; i++)
2726 {
2727 /* Convert chars > 0177 to meta events if desired.
2728 We do this under the same conditions that read_avail_input does. */
2729 if (read_socket_hook == 0)
2730 {
2731 /* If the user says she has a meta key, then believe her. */
2732 if (meta_key == 1 && (buf[i] & 0x80))
2733 e.modifiers = meta_modifier;
2734 if (meta_key != 2)
2735 buf[i] &= ~0x80;
2736 }
2737
2738 XSETINT (e.code, buf[i]);
2739 kbd_buffer_store_event (&e);
2740 /* Don't look at input that follows a C-g too closely.
2741 This reduces lossage due to autorepeat on C-g. */
2742 if (buf[i] == quit_char)
2743 break;
2744 }
2745 }
2746 }
2747
2748 #endif /* not HAVE_SELECT */
2749 #endif /* not VMS */
2750 #endif /* not MSDOS */
2751 \f
2752 #ifdef BSD4_1
2753 void
2754 init_sigio (fd)
2755 int fd;
2756 {
2757 if (noninteractive)
2758 return;
2759 lmode = LINTRUP | lmode;
2760 ioctl (fd, TIOCLSET, &lmode);
2761 }
2762
2763 void
2764 reset_sigio ()
2765 {
2766 if (noninteractive)
2767 return;
2768 lmode = ~LINTRUP & lmode;
2769 ioctl (0, TIOCLSET, &lmode);
2770 }
2771
2772 void
2773 request_sigio ()
2774 {
2775 if (noninteractive)
2776 return;
2777 sigrelse (SIGTINT);
2778
2779 interrupts_deferred = 0;
2780 }
2781
2782 void
2783 unrequest_sigio ()
2784 {
2785 if (noninteractive)
2786 return;
2787 sighold (SIGTINT);
2788
2789 interrupts_deferred = 1;
2790 }
2791
2792 /* still inside #ifdef BSD4_1 */
2793 #ifdef subprocesses
2794
2795 int sigheld; /* Mask of held signals */
2796
2797 void
2798 sigholdx (signum)
2799 int signum;
2800 {
2801 sigheld |= sigbit (signum);
2802 sighold (signum);
2803 }
2804
2805 void
2806 sigisheld (signum)
2807 int signum;
2808 {
2809 sigheld |= sigbit (signum);
2810 }
2811
2812 void
2813 sigunhold (signum)
2814 int signum;
2815 {
2816 sigheld &= ~sigbit (signum);
2817 sigrelse (signum);
2818 }
2819
2820 void
2821 sigfree () /* Free all held signals */
2822 {
2823 int i;
2824 for (i = 0; i < NSIG; i++)
2825 if (sigheld & sigbit (i))
2826 sigrelse (i);
2827 sigheld = 0;
2828 }
2829
2830 int
2831 sigbit (i)
2832 {
2833 return 1 << (i - 1);
2834 }
2835 #endif /* subprocesses */
2836 #endif /* BSD4_1 */
2837 \f
2838 /* POSIX signals support - DJB */
2839 /* Anyone with POSIX signals should have ANSI C declarations */
2840
2841 #ifdef POSIX_SIGNALS
2842
2843 sigset_t empty_mask, full_mask;
2844
2845 signal_handler_t
2846 sys_signal (int signal_number, signal_handler_t action)
2847 {
2848 struct sigaction new_action, old_action;
2849 sigemptyset (&new_action.sa_mask);
2850 new_action.sa_handler = action;
2851 #if defined (SA_RESTART) && ! defined (BROKEN_SA_RESTART) && !defined(SYNC_INPUT)
2852 /* Emacs mostly works better with restartable system services. If this
2853 flag exists, we probably want to turn it on here.
2854 However, on some systems this resets the timeout of `select'
2855 which means that `select' never finishes if it keeps getting signals.
2856 BROKEN_SA_RESTART is defined on those systems. */
2857 /* It's not clear why the comment above says "mostly works better". --Stef
2858 When SYNC_INPUT is set, we don't want SA_RESTART because we need to poll
2859 for pending input so we need long-running syscalls to be interrupted
2860 after a signal that sets the interrupt_input_pending flag. */
2861 new_action.sa_flags = SA_RESTART;
2862 #else
2863 new_action.sa_flags = 0;
2864 #endif
2865 sigaction (signal_number, &new_action, &old_action);
2866 return (old_action.sa_handler);
2867 }
2868
2869 #ifndef __GNUC__
2870 /* If we're compiling with GCC, we don't need this function, since it
2871 can be written as a macro. */
2872 sigset_t
2873 sys_sigmask (int sig)
2874 {
2875 sigset_t mask;
2876 sigemptyset (&mask);
2877 sigaddset (&mask, sig);
2878 return mask;
2879 }
2880 #endif
2881
2882 /* I'd like to have these guys return pointers to the mask storage in here,
2883 but there'd be trouble if the code was saving multiple masks. I'll be
2884 safe and pass the structure. It normally won't be more than 2 bytes
2885 anyhow. - DJB */
2886
2887 sigset_t
2888 sys_sigblock (sigset_t new_mask)
2889 {
2890 sigset_t old_mask;
2891 sigprocmask (SIG_BLOCK, &new_mask, &old_mask);
2892 return (old_mask);
2893 }
2894
2895 sigset_t
2896 sys_sigunblock (sigset_t new_mask)
2897 {
2898 sigset_t old_mask;
2899 sigprocmask (SIG_UNBLOCK, &new_mask, &old_mask);
2900 return (old_mask);
2901 }
2902
2903 sigset_t
2904 sys_sigsetmask (sigset_t new_mask)
2905 {
2906 sigset_t old_mask;
2907 sigprocmask (SIG_SETMASK, &new_mask, &old_mask);
2908 return (old_mask);
2909 }
2910
2911 #endif /* POSIX_SIGNALS */
2912 \f
2913 #if !defined HAVE_STRSIGNAL && !HAVE_DECL_SYS_SIGLIST
2914 static char *my_sys_siglist[NSIG];
2915 # ifdef sys_siglist
2916 # undef sys_siglist
2917 # endif
2918 # define sys_siglist my_sys_siglist
2919 #endif
2920
2921 void
2922 init_signals ()
2923 {
2924 #ifdef POSIX_SIGNALS
2925 sigemptyset (&empty_mask);
2926 sigfillset (&full_mask);
2927 #endif
2928
2929 #if !defined HAVE_STRSIGNAL && !HAVE_DECL_SYS_SIGLIST
2930 if (! initialized)
2931 {
2932 # ifdef SIGABRT
2933 sys_siglist[SIGABRT] = "Aborted";
2934 # endif
2935 # ifdef SIGAIO
2936 sys_siglist[SIGAIO] = "LAN I/O interrupt";
2937 # endif
2938 # ifdef SIGALRM
2939 sys_siglist[SIGALRM] = "Alarm clock";
2940 # endif
2941 # ifdef SIGBUS
2942 sys_siglist[SIGBUS] = "Bus error";
2943 # endif
2944 # ifdef SIGCLD
2945 sys_siglist[SIGCLD] = "Child status changed";
2946 # endif
2947 # ifdef SIGCHLD
2948 sys_siglist[SIGCHLD] = "Child status changed";
2949 # endif
2950 # ifdef SIGCONT
2951 sys_siglist[SIGCONT] = "Continued";
2952 # endif
2953 # ifdef SIGDANGER
2954 sys_siglist[SIGDANGER] = "Swap space dangerously low";
2955 # endif
2956 # ifdef SIGDGNOTIFY
2957 sys_siglist[SIGDGNOTIFY] = "Notification message in queue";
2958 # endif
2959 # ifdef SIGEMT
2960 sys_siglist[SIGEMT] = "Emulation trap";
2961 # endif
2962 # ifdef SIGFPE
2963 sys_siglist[SIGFPE] = "Arithmetic exception";
2964 # endif
2965 # ifdef SIGFREEZE
2966 sys_siglist[SIGFREEZE] = "SIGFREEZE";
2967 # endif
2968 # ifdef SIGGRANT
2969 sys_siglist[SIGGRANT] = "Monitor mode granted";
2970 # endif
2971 # ifdef SIGHUP
2972 sys_siglist[SIGHUP] = "Hangup";
2973 # endif
2974 # ifdef SIGILL
2975 sys_siglist[SIGILL] = "Illegal instruction";
2976 # endif
2977 # ifdef SIGINT
2978 sys_siglist[SIGINT] = "Interrupt";
2979 # endif
2980 # ifdef SIGIO
2981 sys_siglist[SIGIO] = "I/O possible";
2982 # endif
2983 # ifdef SIGIOINT
2984 sys_siglist[SIGIOINT] = "I/O intervention required";
2985 # endif
2986 # ifdef SIGIOT
2987 sys_siglist[SIGIOT] = "IOT trap";
2988 # endif
2989 # ifdef SIGKILL
2990 sys_siglist[SIGKILL] = "Killed";
2991 # endif
2992 # ifdef SIGLOST
2993 sys_siglist[SIGLOST] = "Resource lost";
2994 # endif
2995 # ifdef SIGLWP
2996 sys_siglist[SIGLWP] = "SIGLWP";
2997 # endif
2998 # ifdef SIGMSG
2999 sys_siglist[SIGMSG] = "Monitor mode data available";
3000 # endif
3001 # ifdef SIGPHONE
3002 sys_siglist[SIGWIND] = "SIGPHONE";
3003 # endif
3004 # ifdef SIGPIPE
3005 sys_siglist[SIGPIPE] = "Broken pipe";
3006 # endif
3007 # ifdef SIGPOLL
3008 sys_siglist[SIGPOLL] = "Pollable event occurred";
3009 # endif
3010 # ifdef SIGPROF
3011 sys_siglist[SIGPROF] = "Profiling timer expired";
3012 # endif
3013 # ifdef SIGPTY
3014 sys_siglist[SIGPTY] = "PTY I/O interrupt";
3015 # endif
3016 # ifdef SIGPWR
3017 sys_siglist[SIGPWR] = "Power-fail restart";
3018 # endif
3019 # ifdef SIGQUIT
3020 sys_siglist[SIGQUIT] = "Quit";
3021 # endif
3022 # ifdef SIGRETRACT
3023 sys_siglist[SIGRETRACT] = "Need to relinguish monitor mode";
3024 # endif
3025 # ifdef SIGSAK
3026 sys_siglist[SIGSAK] = "Secure attention";
3027 # endif
3028 # ifdef SIGSEGV
3029 sys_siglist[SIGSEGV] = "Segmentation violation";
3030 # endif
3031 # ifdef SIGSOUND
3032 sys_siglist[SIGSOUND] = "Sound completed";
3033 # endif
3034 # ifdef SIGSTOP
3035 sys_siglist[SIGSTOP] = "Stopped (signal)";
3036 # endif
3037 # ifdef SIGSTP
3038 sys_siglist[SIGSTP] = "Stopped (user)";
3039 # endif
3040 # ifdef SIGSYS
3041 sys_siglist[SIGSYS] = "Bad argument to system call";
3042 # endif
3043 # ifdef SIGTERM
3044 sys_siglist[SIGTERM] = "Terminated";
3045 # endif
3046 # ifdef SIGTHAW
3047 sys_siglist[SIGTHAW] = "SIGTHAW";
3048 # endif
3049 # ifdef SIGTRAP
3050 sys_siglist[SIGTRAP] = "Trace/breakpoint trap";
3051 # endif
3052 # ifdef SIGTSTP
3053 sys_siglist[SIGTSTP] = "Stopped (user)";
3054 # endif
3055 # ifdef SIGTTIN
3056 sys_siglist[SIGTTIN] = "Stopped (tty input)";
3057 # endif
3058 # ifdef SIGTTOU
3059 sys_siglist[SIGTTOU] = "Stopped (tty output)";
3060 # endif
3061 # ifdef SIGURG
3062 sys_siglist[SIGURG] = "Urgent I/O condition";
3063 # endif
3064 # ifdef SIGUSR1
3065 sys_siglist[SIGUSR1] = "User defined signal 1";
3066 # endif
3067 # ifdef SIGUSR2
3068 sys_siglist[SIGUSR2] = "User defined signal 2";
3069 # endif
3070 # ifdef SIGVTALRM
3071 sys_siglist[SIGVTALRM] = "Virtual timer expired";
3072 # endif
3073 # ifdef SIGWAITING
3074 sys_siglist[SIGWAITING] = "Process's LWPs are blocked";
3075 # endif
3076 # ifdef SIGWINCH
3077 sys_siglist[SIGWINCH] = "Window size changed";
3078 # endif
3079 # ifdef SIGWIND
3080 sys_siglist[SIGWIND] = "SIGWIND";
3081 # endif
3082 # ifdef SIGXCPU
3083 sys_siglist[SIGXCPU] = "CPU time limit exceeded";
3084 # endif
3085 # ifdef SIGXFSZ
3086 sys_siglist[SIGXFSZ] = "File size limit exceeded";
3087 # endif
3088 }
3089 #endif /* !defined HAVE_STRSIGNAL && !defined HAVE_DECL_SYS_SIGLIST */
3090 }
3091 \f
3092 #ifndef HAVE_RANDOM
3093 #ifdef random
3094 #define HAVE_RANDOM
3095 #endif
3096 #endif
3097
3098 /* Figure out how many bits the system's random number generator uses.
3099 `random' and `lrand48' are assumed to return 31 usable bits.
3100 BSD `rand' returns a 31 bit value but the low order bits are unusable;
3101 so we'll shift it and treat it like the 15-bit USG `rand'. */
3102
3103 #ifndef RAND_BITS
3104 # ifdef HAVE_RANDOM
3105 # define RAND_BITS 31
3106 # else /* !HAVE_RANDOM */
3107 # ifdef HAVE_LRAND48
3108 # define RAND_BITS 31
3109 # define random lrand48
3110 # else /* !HAVE_LRAND48 */
3111 # define RAND_BITS 15
3112 # if RAND_MAX == 32767
3113 # define random rand
3114 # else /* RAND_MAX != 32767 */
3115 # if RAND_MAX == 2147483647
3116 # define random() (rand () >> 16)
3117 # else /* RAND_MAX != 2147483647 */
3118 # ifdef USG
3119 # define random rand
3120 # else
3121 # define random() (rand () >> 16)
3122 # endif /* !USG */
3123 # endif /* RAND_MAX != 2147483647 */
3124 # endif /* RAND_MAX != 32767 */
3125 # endif /* !HAVE_LRAND48 */
3126 # endif /* !HAVE_RANDOM */
3127 #endif /* !RAND_BITS */
3128
3129 void
3130 seed_random (arg)
3131 long arg;
3132 {
3133 #ifdef HAVE_RANDOM
3134 srandom ((unsigned int)arg);
3135 #else
3136 # ifdef HAVE_LRAND48
3137 srand48 (arg);
3138 # else
3139 srand ((unsigned int)arg);
3140 # endif
3141 #endif
3142 }
3143
3144 /*
3145 * Build a full Emacs-sized word out of whatever we've got.
3146 * This suffices even for a 64-bit architecture with a 15-bit rand.
3147 */
3148 long
3149 get_random ()
3150 {
3151 long val = random ();
3152 #if VALBITS > RAND_BITS
3153 val = (val << RAND_BITS) ^ random ();
3154 #if VALBITS > 2*RAND_BITS
3155 val = (val << RAND_BITS) ^ random ();
3156 #if VALBITS > 3*RAND_BITS
3157 val = (val << RAND_BITS) ^ random ();
3158 #if VALBITS > 4*RAND_BITS
3159 val = (val << RAND_BITS) ^ random ();
3160 #endif /* need at least 5 */
3161 #endif /* need at least 4 */
3162 #endif /* need at least 3 */
3163 #endif /* need at least 2 */
3164 return val & ((1L << VALBITS) - 1);
3165 }
3166 \f
3167 #ifdef WRONG_NAME_INSQUE
3168
3169 insque (q,p)
3170 caddr_t q,p;
3171 {
3172 _insque (q,p);
3173 }
3174
3175 #endif
3176 \f
3177 #ifdef VMS
3178
3179 #ifdef getenv
3180 /* If any place else asks for the TERM variable,
3181 allow it to be overridden with the EMACS_TERM variable
3182 before attempting to translate the logical name TERM. As a last
3183 resort, ask for VAX C's special idea of the TERM variable. */
3184 #undef getenv
3185 char *
3186 sys_getenv (name)
3187 char *name;
3188 {
3189 register char *val;
3190 static char buf[256];
3191 static struct dsc$descriptor_s equiv
3192 = {sizeof (buf), DSC$K_DTYPE_T, DSC$K_CLASS_S, buf};
3193 static struct dsc$descriptor_s d_name
3194 = {0, DSC$K_DTYPE_T, DSC$K_CLASS_S, 0};
3195 short eqlen;
3196
3197 if (!strcmp (name, "TERM"))
3198 {
3199 val = (char *) getenv ("EMACS_TERM");
3200 if (val)
3201 return val;
3202 }
3203
3204 d_name.dsc$w_length = strlen (name);
3205 d_name.dsc$a_pointer = name;
3206 if (LIB$SYS_TRNLOG (&d_name, &eqlen, &equiv) == 1)
3207 {
3208 char *str = (char *) xmalloc (eqlen + 1);
3209 bcopy (buf, str, eqlen);
3210 str[eqlen] = '\0';
3211 /* This is a storage leak, but a pain to fix. With luck,
3212 no one will ever notice. */
3213 return str;
3214 }
3215 return (char *) getenv (name);
3216 }
3217 #endif /* getenv */
3218
3219 #ifdef abort
3220 /* Since VMS doesn't believe in core dumps, the only way to debug this beast is
3221 to force a call on the debugger from within the image. */
3222 #undef abort
3223 sys_abort ()
3224 {
3225 reset_sys_modes ();
3226 LIB$SIGNAL (SS$_DEBUG);
3227 }
3228 #endif /* abort */
3229 #endif /* VMS */
3230 \f
3231 #ifdef VMS
3232 #ifdef LINK_CRTL_SHARE
3233 #ifdef SHARABLE_LIB_BUG
3234 /* Variables declared noshare and initialized in sharable libraries
3235 cannot be shared. The VMS linker incorrectly forces you to use a private
3236 version which is uninitialized... If not for this "feature", we
3237 could use the C library definition of sys_nerr and sys_errlist. */
3238 int sys_nerr = 35;
3239 char *sys_errlist[] =
3240 {
3241 "error 0",
3242 "not owner",
3243 "no such file or directory",
3244 "no such process",
3245 "interrupted system call",
3246 "i/o error",
3247 "no such device or address",
3248 "argument list too long",
3249 "exec format error",
3250 "bad file number",
3251 "no child process",
3252 "no more processes",
3253 "not enough memory",
3254 "permission denied",
3255 "bad address",
3256 "block device required",
3257 "mount devices busy",
3258 "file exists",
3259 "cross-device link",
3260 "no such device",
3261 "not a directory",
3262 "is a directory",
3263 "invalid argument",
3264 "file table overflow",
3265 "too many open files",
3266 "not a typewriter",
3267 "text file busy",
3268 "file too big",
3269 "no space left on device",
3270 "illegal seek",
3271 "read-only file system",
3272 "too many links",
3273 "broken pipe",
3274 "math argument",
3275 "result too large",
3276 "I/O stream empty",
3277 "vax/vms specific error code nontranslatable error"
3278 };
3279 #endif /* SHARABLE_LIB_BUG */
3280 #endif /* LINK_CRTL_SHARE */
3281 #endif /* VMS */
3282
3283 #ifndef HAVE_STRERROR
3284 #ifndef WINDOWSNT
3285 char *
3286 strerror (errnum)
3287 int errnum;
3288 {
3289 extern char *sys_errlist[];
3290 extern int sys_nerr;
3291
3292 if (errnum >= 0 && errnum < sys_nerr)
3293 return sys_errlist[errnum];
3294 return (char *) "Unknown error";
3295 }
3296 #endif /* not WINDOWSNT */
3297 #endif /* ! HAVE_STRERROR */
3298 \f
3299 int
3300 emacs_open (path, oflag, mode)
3301 const char *path;
3302 int oflag, mode;
3303 {
3304 register int rtnval;
3305
3306 #ifdef BSD4_1
3307 if (oflag & O_CREAT)
3308 return creat (path, mode);
3309 #endif
3310
3311 while ((rtnval = open (path, oflag, mode)) == -1
3312 && (errno == EINTR))
3313 QUIT;
3314 return (rtnval);
3315 }
3316
3317 int
3318 emacs_close (fd)
3319 int fd;
3320 {
3321 int did_retry = 0;
3322 register int rtnval;
3323
3324 #if defined (MAC_OSX) && defined (HAVE_CARBON)
3325 {
3326 extern int mac_try_close_socket P_ ((int));
3327
3328 if (mac_try_close_socket (fd))
3329 return 0;
3330 }
3331 #endif
3332
3333 while ((rtnval = close (fd)) == -1
3334 && (errno == EINTR))
3335 did_retry = 1;
3336
3337 /* If close is interrupted SunOS 4.1 may or may not have closed the
3338 file descriptor. If it did the second close will fail with
3339 errno = EBADF. That means we have succeeded. */
3340 if (rtnval == -1 && did_retry && errno == EBADF)
3341 return 0;
3342
3343 return rtnval;
3344 }
3345
3346 int
3347 emacs_read (fildes, buf, nbyte)
3348 int fildes;
3349 char *buf;
3350 unsigned int nbyte;
3351 {
3352 register int rtnval;
3353
3354 while ((rtnval = read (fildes, buf, nbyte)) == -1
3355 && (errno == EINTR))
3356 QUIT;
3357 return (rtnval);
3358 }
3359
3360 int
3361 emacs_write (fildes, buf, nbyte)
3362 int fildes;
3363 const char *buf;
3364 unsigned int nbyte;
3365 {
3366 register int rtnval, bytes_written;
3367
3368 bytes_written = 0;
3369
3370 while (nbyte > 0)
3371 {
3372 rtnval = write (fildes, buf, nbyte);
3373
3374 if (rtnval == -1)
3375 {
3376 if (errno == EINTR)
3377 {
3378 #ifdef SYNC_INPUT
3379 /* I originally used `QUIT' but that might causes files to
3380 be truncated if you hit C-g in the middle of it. --Stef */
3381 if (interrupt_input_pending)
3382 handle_async_input ();
3383 #endif
3384 continue;
3385 }
3386 else
3387 return (bytes_written ? bytes_written : -1);
3388 }
3389
3390 buf += rtnval;
3391 nbyte -= rtnval;
3392 bytes_written += rtnval;
3393 }
3394 return (bytes_written);
3395 }
3396 \f
3397 #ifdef USG
3398 /*
3399 * All of the following are for USG.
3400 *
3401 * On USG systems the system calls are INTERRUPTIBLE by signals
3402 * that the user program has elected to catch. Thus the system call
3403 * must be retried in these cases. To handle this without massive
3404 * changes in the source code, we remap the standard system call names
3405 * to names for our own functions in sysdep.c that do the system call
3406 * with retries. Actually, for portability reasons, it is good
3407 * programming practice, as this example shows, to limit all actual
3408 * system calls to a single occurrence in the source. Sure, this
3409 * adds an extra level of function call overhead but it is almost
3410 * always negligible. Fred Fish, Unisoft Systems Inc.
3411 */
3412
3413 /*
3414 * Warning, this function may not duplicate 4.2 action properly
3415 * under error conditions.
3416 */
3417
3418 #ifndef MAXPATHLEN
3419 /* In 4.1, param.h fails to define this. */
3420 #define MAXPATHLEN 1024
3421 #endif
3422
3423 #ifndef HAVE_GETWD
3424
3425 char *
3426 getwd (pathname)
3427 char *pathname;
3428 {
3429 char *npath, *spath;
3430 extern char *getcwd ();
3431
3432 BLOCK_INPUT; /* getcwd uses malloc */
3433 spath = npath = getcwd ((char *) 0, MAXPATHLEN);
3434 if (spath == 0)
3435 {
3436 UNBLOCK_INPUT;
3437 return spath;
3438 }
3439 /* On Altos 3068, getcwd can return @hostname/dir, so discard
3440 up to first slash. Should be harmless on other systems. */
3441 while (*npath && *npath != '/')
3442 npath++;
3443 strcpy (pathname, npath);
3444 free (spath); /* getcwd uses malloc */
3445 UNBLOCK_INPUT;
3446 return pathname;
3447 }
3448
3449 #endif /* HAVE_GETWD */
3450
3451 /*
3452 * Emulate rename using unlink/link. Note that this is
3453 * only partially correct. Also, doesn't enforce restriction
3454 * that files be of same type (regular->regular, dir->dir, etc).
3455 */
3456
3457 #ifndef HAVE_RENAME
3458
3459 rename (from, to)
3460 const char *from;
3461 const char *to;
3462 {
3463 if (access (from, 0) == 0)
3464 {
3465 unlink (to);
3466 if (link (from, to) == 0)
3467 if (unlink (from) == 0)
3468 return (0);
3469 }
3470 return (-1);
3471 }
3472
3473 #endif
3474
3475
3476 #ifdef HPUX
3477 #ifndef HAVE_PERROR
3478
3479 /* HPUX curses library references perror, but as far as we know
3480 it won't be called. Anyway this definition will do for now. */
3481
3482 perror ()
3483 {
3484 }
3485
3486 #endif /* not HAVE_PERROR */
3487 #endif /* HPUX */
3488
3489 #ifndef HAVE_DUP2
3490
3491 /*
3492 * Emulate BSD dup2. First close newd if it already exists.
3493 * Then, attempt to dup oldd. If not successful, call dup2 recursively
3494 * until we are, then close the unsuccessful ones.
3495 */
3496
3497 dup2 (oldd, newd)
3498 int oldd;
3499 int newd;
3500 {
3501 register int fd, ret;
3502
3503 emacs_close (newd);
3504
3505 #ifdef F_DUPFD
3506 return fcntl (oldd, F_DUPFD, newd);
3507 #else
3508 fd = dup (old);
3509 if (fd == -1)
3510 return -1;
3511 if (fd == new)
3512 return new;
3513 ret = dup2 (old,new);
3514 emacs_close (fd);
3515 return ret;
3516 #endif
3517 }
3518
3519 #endif /* not HAVE_DUP2 */
3520
3521 /*
3522 * Gettimeofday. Simulate as much as possible. Only accurate
3523 * to nearest second. Emacs doesn't use tzp so ignore it for now.
3524 * Only needed when subprocesses are defined.
3525 */
3526
3527 #ifdef subprocesses
3528 #ifndef VMS
3529 #ifndef HAVE_GETTIMEOFDAY
3530 #ifdef HAVE_TIMEVAL
3531
3532 /* ARGSUSED */
3533 int
3534 gettimeofday (tp, tzp)
3535 struct timeval *tp;
3536 struct timezone *tzp;
3537 {
3538 extern long time ();
3539
3540 tp->tv_sec = time ((long *)0);
3541 tp->tv_usec = 0;
3542 if (tzp != 0)
3543 tzp->tz_minuteswest = -1;
3544 return 0;
3545 }
3546
3547 #endif
3548 #endif
3549 #endif
3550 #endif /* subprocess && !HAVE_GETTIMEOFDAY && HAVE_TIMEVAL && !VMS */
3551
3552 /*
3553 * This function will go away as soon as all the stubs fixed. (fnf)
3554 */
3555
3556 void
3557 croak (badfunc)
3558 char *badfunc;
3559 {
3560 printf ("%s not yet implemented\r\n", badfunc);
3561 reset_sys_modes ();
3562 exit (1);
3563 }
3564
3565 #endif /* USG */
3566 \f
3567 /* Directory routines for systems that don't have them. */
3568
3569 #ifdef SYSV_SYSTEM_DIR
3570
3571 #include <dirent.h>
3572
3573 #if defined (BROKEN_CLOSEDIR) || !defined (HAVE_CLOSEDIR)
3574
3575 int
3576 closedir (dirp)
3577 register DIR *dirp; /* stream from opendir */
3578 {
3579 int rtnval;
3580
3581 rtnval = emacs_close (dirp->dd_fd);
3582
3583 /* Some systems (like Solaris) allocate the buffer and the DIR all
3584 in one block. Why in the world are we freeing this ourselves
3585 anyway? */
3586 #if ! (defined (sun) && defined (USG5_4))
3587 xfree ((char *) dirp->dd_buf); /* directory block defined in <dirent.h> */
3588 #endif
3589 xfree ((char *) dirp);
3590
3591 return rtnval;
3592 }
3593 #endif /* BROKEN_CLOSEDIR or not HAVE_CLOSEDIR */
3594 #endif /* SYSV_SYSTEM_DIR */
3595
3596 #ifdef NONSYSTEM_DIR_LIBRARY
3597
3598 DIR *
3599 opendir (filename)
3600 char *filename; /* name of directory */
3601 {
3602 register DIR *dirp; /* -> malloc'ed storage */
3603 register int fd; /* file descriptor for read */
3604 struct stat sbuf; /* result of fstat */
3605
3606 fd = emacs_open (filename, O_RDONLY, 0);
3607 if (fd < 0)
3608 return 0;
3609
3610 BLOCK_INPUT;
3611 if (fstat (fd, &sbuf) < 0
3612 || (sbuf.st_mode & S_IFMT) != S_IFDIR
3613 || (dirp = (DIR *) xmalloc (sizeof (DIR))) == 0)
3614 {
3615 emacs_close (fd);
3616 UNBLOCK_INPUT;
3617 return 0; /* bad luck today */
3618 }
3619 UNBLOCK_INPUT;
3620
3621 dirp->dd_fd = fd;
3622 dirp->dd_loc = dirp->dd_size = 0; /* refill needed */
3623
3624 return dirp;
3625 }
3626
3627 void
3628 closedir (dirp)
3629 register DIR *dirp; /* stream from opendir */
3630 {
3631 emacs_close (dirp->dd_fd);
3632 xfree ((char *) dirp);
3633 }
3634
3635
3636 #ifndef VMS
3637 #define DIRSIZ 14
3638 struct olddir
3639 {
3640 ino_t od_ino; /* inode */
3641 char od_name[DIRSIZ]; /* filename */
3642 };
3643 #endif /* not VMS */
3644
3645 struct direct dir_static; /* simulated directory contents */
3646
3647 /* ARGUSED */
3648 struct direct *
3649 readdir (dirp)
3650 register DIR *dirp; /* stream from opendir */
3651 {
3652 #ifndef VMS
3653 register struct olddir *dp; /* -> directory data */
3654 #else /* VMS */
3655 register struct dir$_name *dp; /* -> directory data */
3656 register struct dir$_version *dv; /* -> version data */
3657 #endif /* VMS */
3658
3659 for (; ;)
3660 {
3661 if (dirp->dd_loc >= dirp->dd_size)
3662 dirp->dd_loc = dirp->dd_size = 0;
3663
3664 if (dirp->dd_size == 0 /* refill buffer */
3665 && (dirp->dd_size = emacs_read (dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ)) <= 0)
3666 return 0;
3667
3668 #ifndef VMS
3669 dp = (struct olddir *) &dirp->dd_buf[dirp->dd_loc];
3670 dirp->dd_loc += sizeof (struct olddir);
3671
3672 if (dp->od_ino != 0) /* not deleted entry */
3673 {
3674 dir_static.d_ino = dp->od_ino;
3675 strncpy (dir_static.d_name, dp->od_name, DIRSIZ);
3676 dir_static.d_name[DIRSIZ] = '\0';
3677 dir_static.d_namlen = strlen (dir_static.d_name);
3678 dir_static.d_reclen = sizeof (struct direct)
3679 - MAXNAMLEN + 3
3680 + dir_static.d_namlen - dir_static.d_namlen % 4;
3681 return &dir_static; /* -> simulated structure */
3682 }
3683 #else /* VMS */
3684 dp = (struct dir$_name *) dirp->dd_buf;
3685 if (dirp->dd_loc == 0)
3686 dirp->dd_loc = (dp->dir$b_namecount&1) ? dp->dir$b_namecount + 1
3687 : dp->dir$b_namecount;
3688 dv = (struct dir$_version *)&dp->dir$t_name[dirp->dd_loc];
3689 dir_static.d_ino = dv->dir$w_fid_num;
3690 dir_static.d_namlen = dp->dir$b_namecount;
3691 dir_static.d_reclen = sizeof (struct direct)
3692 - MAXNAMLEN + 3
3693 + dir_static.d_namlen - dir_static.d_namlen % 4;
3694 strncpy (dir_static.d_name, dp->dir$t_name, dp->dir$b_namecount);
3695 dir_static.d_name[dir_static.d_namlen] = '\0';
3696 dirp->dd_loc = dirp->dd_size; /* only one record at a time */
3697 return &dir_static;
3698 #endif /* VMS */
3699 }
3700 }
3701
3702 #ifdef VMS
3703 /* readdirver is just like readdir except it returns all versions of a file
3704 as separate entries. */
3705
3706 /* ARGUSED */
3707 struct direct *
3708 readdirver (dirp)
3709 register DIR *dirp; /* stream from opendir */
3710 {
3711 register struct dir$_name *dp; /* -> directory data */
3712 register struct dir$_version *dv; /* -> version data */
3713
3714 if (dirp->dd_loc >= dirp->dd_size - sizeof (struct dir$_name))
3715 dirp->dd_loc = dirp->dd_size = 0;
3716
3717 if (dirp->dd_size == 0 /* refill buffer */
3718 && (dirp->dd_size = sys_read (dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ)) <= 0)
3719 return 0;
3720
3721 dp = (struct dir$_name *) dirp->dd_buf;
3722 if (dirp->dd_loc == 0)
3723 dirp->dd_loc = (dp->dir$b_namecount & 1) ? dp->dir$b_namecount + 1
3724 : dp->dir$b_namecount;
3725 dv = (struct dir$_version *) &dp->dir$t_name[dirp->dd_loc];
3726 strncpy (dir_static.d_name, dp->dir$t_name, dp->dir$b_namecount);
3727 sprintf (&dir_static.d_name[dp->dir$b_namecount], ";%d", dv->dir$w_version);
3728 dir_static.d_namlen = strlen (dir_static.d_name);
3729 dir_static.d_ino = dv->dir$w_fid_num;
3730 dir_static.d_reclen = sizeof (struct direct) - MAXNAMLEN + 3
3731 + dir_static.d_namlen - dir_static.d_namlen % 4;
3732 dirp->dd_loc = ((char *) (++dv) - dp->dir$t_name);
3733 return &dir_static;
3734 }
3735
3736 #endif /* VMS */
3737
3738 #endif /* NONSYSTEM_DIR_LIBRARY */
3739
3740 \f
3741 int
3742 set_file_times (filename, atime, mtime)
3743 const char *filename;
3744 EMACS_TIME atime, mtime;
3745 {
3746 #ifdef HAVE_UTIMES
3747 struct timeval tv[2];
3748 tv[0] = atime;
3749 tv[1] = mtime;
3750 return utimes (filename, tv);
3751 #else /* not HAVE_UTIMES */
3752 struct utimbuf utb;
3753 utb.actime = EMACS_SECS (atime);
3754 utb.modtime = EMACS_SECS (mtime);
3755 return utime (filename, &utb);
3756 #endif /* not HAVE_UTIMES */
3757 }
3758 \f
3759 /* mkdir and rmdir functions, for systems which don't have them. */
3760
3761 #ifndef HAVE_MKDIR
3762 /*
3763 * Written by Robert Rother, Mariah Corporation, August 1985.
3764 *
3765 * If you want it, it's yours. All I ask in return is that if you
3766 * figure out how to do this in a Bourne Shell script you send me
3767 * a copy.
3768 * sdcsvax!rmr or rmr@uscd
3769 *
3770 * Severely hacked over by John Gilmore to make a 4.2BSD compatible
3771 * subroutine. 11Mar86; hoptoad!gnu
3772 *
3773 * Modified by rmtodd@uokmax 6-28-87 -- when making an already existing dir,
3774 * subroutine didn't return EEXIST. It does now.
3775 */
3776
3777 /*
3778 * Make a directory.
3779 */
3780 #ifdef MKDIR_PROTOTYPE
3781 MKDIR_PROTOTYPE
3782 #else
3783 int
3784 mkdir (dpath, dmode)
3785 char *dpath;
3786 int dmode;
3787 #endif
3788 {
3789 int cpid, status, fd;
3790 struct stat statbuf;
3791
3792 if (stat (dpath, &statbuf) == 0)
3793 {
3794 errno = EEXIST; /* Stat worked, so it already exists */
3795 return -1;
3796 }
3797
3798 /* If stat fails for a reason other than non-existence, return error */
3799 if (errno != ENOENT)
3800 return -1;
3801
3802 synch_process_alive = 1;
3803 switch (cpid = fork ())
3804 {
3805
3806 case -1: /* Error in fork */
3807 return (-1); /* Errno is set already */
3808
3809 case 0: /* Child process */
3810 /*
3811 * Cheap hack to set mode of new directory. Since this
3812 * child process is going away anyway, we zap its umask.
3813 * FIXME, this won't suffice to set SUID, SGID, etc. on this
3814 * directory. Does anybody care?
3815 */
3816 status = umask (0); /* Get current umask */
3817 status = umask (status | (0777 & ~dmode)); /* Set for mkdir */
3818 fd = emacs_open ("/dev/null", O_RDWR, 0);
3819 if (fd >= 0)
3820 {
3821 dup2 (fd, 0);
3822 dup2 (fd, 1);
3823 dup2 (fd, 2);
3824 }
3825 execl ("/bin/mkdir", "mkdir", dpath, (char *) 0);
3826 _exit (-1); /* Can't exec /bin/mkdir */
3827
3828 default: /* Parent process */
3829 wait_for_termination (cpid);
3830 }
3831
3832 if (synch_process_death != 0 || synch_process_retcode != 0
3833 || synch_process_termsig != 0)
3834 {
3835 errno = EIO; /* We don't know why, but */
3836 return -1; /* /bin/mkdir failed */
3837 }
3838
3839 return 0;
3840 }
3841 #endif /* not HAVE_MKDIR */
3842
3843 #ifndef HAVE_RMDIR
3844 int
3845 rmdir (dpath)
3846 char *dpath;
3847 {
3848 int cpid, status, fd;
3849 struct stat statbuf;
3850
3851 if (stat (dpath, &statbuf) != 0)
3852 {
3853 /* Stat just set errno. We don't have to */
3854 return -1;
3855 }
3856
3857 synch_process_alive = 1;
3858 switch (cpid = fork ())
3859 {
3860
3861 case -1: /* Error in fork */
3862 return (-1); /* Errno is set already */
3863
3864 case 0: /* Child process */
3865 fd = emacs_open ("/dev/null", O_RDWR, 0);
3866 if (fd >= 0)
3867 {
3868 dup2 (fd, 0);
3869 dup2 (fd, 1);
3870 dup2 (fd, 2);
3871 }
3872 execl ("/bin/rmdir", "rmdir", dpath, (char *) 0);
3873 _exit (-1); /* Can't exec /bin/rmdir */
3874
3875 default: /* Parent process */
3876 wait_for_termination (cpid);
3877 }
3878
3879 if (synch_process_death != 0 || synch_process_retcode != 0
3880 || synch_process_termsig != 0)
3881 {
3882 errno = EIO; /* We don't know why, but */
3883 return -1; /* /bin/rmdir failed */
3884 }
3885
3886 return 0;
3887 }
3888 #endif /* !HAVE_RMDIR */
3889
3890
3891 \f
3892 /* Functions for VMS */
3893 #ifdef VMS
3894 #include <acldef.h>
3895 #include <chpdef.h>
3896 #include <jpidef.h>
3897
3898 /* Return as a string the VMS error string pertaining to STATUS.
3899 Reuses the same static buffer each time it is called. */
3900
3901 char *
3902 vmserrstr (status)
3903 int status; /* VMS status code */
3904 {
3905 int bufadr[2];
3906 short len;
3907 static char buf[257];
3908
3909 bufadr[0] = sizeof buf - 1;
3910 bufadr[1] = (int) buf;
3911 if (! (SYS$GETMSG (status, &len, bufadr, 0x1, 0) & 1))
3912 return "untranslatable VMS error status";
3913 buf[len] = '\0';
3914 return buf;
3915 }
3916
3917 #ifdef access
3918 #undef access
3919
3920 /* The following is necessary because 'access' emulation by VMS C (2.0) does
3921 * not work correctly. (It also doesn't work well in version 2.3.)
3922 */
3923
3924 #ifdef VMS4_4
3925
3926 #define DESCRIPTOR(name,string) struct dsc$descriptor_s name = \
3927 { strlen (string), DSC$K_DTYPE_T, DSC$K_CLASS_S, string }
3928
3929 typedef union {
3930 struct {
3931 unsigned short s_buflen;
3932 unsigned short s_code;
3933 char *s_bufadr;
3934 unsigned short *s_retlenadr;
3935 } s;
3936 int end;
3937 } item;
3938 #define buflen s.s_buflen
3939 #define code s.s_code
3940 #define bufadr s.s_bufadr
3941 #define retlenadr s.s_retlenadr
3942
3943 #define R_OK 4 /* test for read permission */
3944 #define W_OK 2 /* test for write permission */
3945 #define X_OK 1 /* test for execute (search) permission */
3946 #define F_OK 0 /* test for presence of file */
3947
3948 int
3949 sys_access (path, mode)
3950 char *path;
3951 int mode;
3952 {
3953 static char *user = NULL;
3954 char dir_fn[512];
3955
3956 /* translate possible directory spec into .DIR file name, so brain-dead
3957 * access can treat the directory like a file. */
3958 if (directory_file_name (path, dir_fn))
3959 path = dir_fn;
3960
3961 if (mode == F_OK)
3962 return access (path, mode);
3963 if (user == NULL && (user = (char *) getenv ("USER")) == NULL)
3964 return -1;
3965 {
3966 int stat;
3967 int flags;
3968 int acces;
3969 unsigned short int dummy;
3970 item itemlst[3];
3971 static int constant = ACL$C_FILE;
3972 DESCRIPTOR (path_desc, path);
3973 DESCRIPTOR (user_desc, user);
3974
3975 flags = 0;
3976 acces = 0;
3977 if ((mode & X_OK) && ((stat = access (path, mode)) < 0 || mode == X_OK))
3978 return stat;
3979 if (mode & R_OK)
3980 acces |= CHP$M_READ;
3981 if (mode & W_OK)
3982 acces |= CHP$M_WRITE;
3983 itemlst[0].buflen = sizeof (int);
3984 itemlst[0].code = CHP$_FLAGS;
3985 itemlst[0].bufadr = (char *) &flags;
3986 itemlst[0].retlenadr = &dummy;
3987 itemlst[1].buflen = sizeof (int);
3988 itemlst[1].code = CHP$_ACCESS;
3989 itemlst[1].bufadr = (char *) &acces;
3990 itemlst[1].retlenadr = &dummy;
3991 itemlst[2].end = CHP$_END;
3992 stat = SYS$CHECK_ACCESS (&constant, &path_desc, &user_desc, itemlst);
3993 return stat == SS$_NORMAL ? 0 : -1;
3994 }
3995 }
3996
3997 #else /* not VMS4_4 */
3998
3999 #include <prvdef.h>
4000 #define ACE$M_WRITE 2
4001 #define ACE$C_KEYID 1
4002
4003 static unsigned short memid, grpid;
4004 static unsigned int uic;
4005
4006 /* Called from init_sys_modes, so it happens not very often
4007 but at least each time Emacs is loaded. */
4008 void
4009 sys_access_reinit ()
4010 {
4011 uic = 0;
4012 }
4013
4014 int
4015 sys_access (filename, type)
4016 char * filename;
4017 int type;
4018 {
4019 struct FAB fab;
4020 struct XABPRO xab;
4021 int status, size, i, typecode, acl_controlled;
4022 unsigned int *aclptr, *aclend, aclbuf[60];
4023 union prvdef prvmask;
4024
4025 /* Get UIC and GRP values for protection checking. */
4026 if (uic == 0)
4027 {
4028 status = LIB$GETJPI (&JPI$_UIC, 0, 0, &uic, 0, 0);
4029 if (! (status & 1))
4030 return -1;
4031 memid = uic & 0xFFFF;
4032 grpid = uic >> 16;
4033 }
4034
4035 if (type != 2) /* not checking write access */
4036 return access (filename, type);
4037
4038 /* Check write protection. */
4039
4040 #define CHECKPRIV(bit) (prvmask.bit)
4041 #define WRITABLE(field) (! ((xab.xab$w_pro >> field) & XAB$M_NOWRITE))
4042
4043 /* Find privilege bits */
4044 status = SYS$SETPRV (0, 0, 0, prvmask);
4045 if (! (status & 1))
4046 error ("Unable to find privileges: %s", vmserrstr (status));
4047 if (CHECKPRIV (PRV$V_BYPASS))
4048 return 0; /* BYPASS enabled */
4049 fab = cc$rms_fab;
4050 fab.fab$b_fac = FAB$M_GET;
4051 fab.fab$l_fna = filename;
4052 fab.fab$b_fns = strlen (filename);
4053 fab.fab$l_xab = &xab;
4054 xab = cc$rms_xabpro;
4055 xab.xab$l_aclbuf = aclbuf;
4056 xab.xab$w_aclsiz = sizeof (aclbuf);
4057 status = SYS$OPEN (&fab, 0, 0);
4058 if (! (status & 1))
4059 return -1;
4060 SYS$CLOSE (&fab, 0, 0);
4061 /* Check system access */
4062 if (CHECKPRIV (PRV$V_SYSPRV) && WRITABLE (XAB$V_SYS))
4063 return 0;
4064 /* Check ACL entries, if any */
4065 acl_controlled = 0;
4066 if (xab.xab$w_acllen > 0)
4067 {
4068 aclptr = aclbuf;
4069 aclend = &aclbuf[xab.xab$w_acllen / 4];
4070 while (*aclptr && aclptr < aclend)
4071 {
4072 size = (*aclptr & 0xff) / 4;
4073 typecode = (*aclptr >> 8) & 0xff;
4074 if (typecode == ACE$C_KEYID)
4075 for (i = size - 1; i > 1; i--)
4076 if (aclptr[i] == uic)
4077 {
4078 acl_controlled = 1;
4079 if (aclptr[1] & ACE$M_WRITE)
4080 return 0; /* Write access through ACL */
4081 }
4082 aclptr = &aclptr[size];
4083 }
4084 if (acl_controlled) /* ACL specified, prohibits write access */
4085 return -1;
4086 }
4087 /* No ACL entries specified, check normal protection */
4088 if (WRITABLE (XAB$V_WLD)) /* World writable */
4089 return 0;
4090 if (WRITABLE (XAB$V_GRP) &&
4091 (unsigned short) (xab.xab$l_uic >> 16) == grpid)
4092 return 0; /* Group writable */
4093 if (WRITABLE (XAB$V_OWN) &&
4094 (xab.xab$l_uic & 0xFFFF) == memid)
4095 return 0; /* Owner writable */
4096
4097 return -1; /* Not writable */
4098 }
4099 #endif /* not VMS4_4 */
4100 #endif /* access */
4101
4102 static char vtbuf[NAM$C_MAXRSS+1];
4103
4104 /* translate a vms file spec to a unix path */
4105 char *
4106 sys_translate_vms (vfile)
4107 char * vfile;
4108 {
4109 char * p;
4110 char * targ;
4111
4112 if (!vfile)
4113 return 0;
4114
4115 targ = vtbuf;
4116
4117 /* leading device or logical name is a root directory */
4118 if (p = strchr (vfile, ':'))
4119 {
4120 *targ++ = '/';
4121 while (vfile < p)
4122 *targ++ = *vfile++;
4123 vfile++;
4124 *targ++ = '/';
4125 }
4126 p = vfile;
4127 if (*p == '[' || *p == '<')
4128 {
4129 while (*++vfile != *p + 2)
4130 switch (*vfile)
4131 {
4132 case '.':
4133 if (vfile[-1] == *p)
4134 *targ++ = '.';
4135 *targ++ = '/';
4136 break;
4137
4138 case '-':
4139 *targ++ = '.';
4140 *targ++ = '.';
4141 break;
4142
4143 default:
4144 *targ++ = *vfile;
4145 break;
4146 }
4147 vfile++;
4148 *targ++ = '/';
4149 }
4150 while (*vfile)
4151 *targ++ = *vfile++;
4152
4153 return vtbuf;
4154 }
4155
4156 static char utbuf[NAM$C_MAXRSS+1];
4157
4158 /* translate a unix path to a VMS file spec */
4159 char *
4160 sys_translate_unix (ufile)
4161 char * ufile;
4162 {
4163 int slash_seen = 0;
4164 char *p;
4165 char * targ;
4166
4167 if (!ufile)
4168 return 0;
4169
4170 targ = utbuf;
4171
4172 if (*ufile == '/')
4173 {
4174 ufile++;
4175 }
4176
4177 while (*ufile)
4178 {
4179 switch (*ufile)
4180 {
4181 case '/':
4182 if (slash_seen)
4183 if (index (&ufile[1], '/'))
4184 *targ++ = '.';
4185 else
4186 *targ++ = ']';
4187 else
4188 {
4189 *targ++ = ':';
4190 if (index (&ufile[1], '/'))
4191 *targ++ = '[';
4192 slash_seen = 1;
4193 }
4194 break;
4195
4196 case '.':
4197 if (strncmp (ufile, "./", 2) == 0)
4198 {
4199 if (!slash_seen)
4200 {
4201 *targ++ = '[';
4202 slash_seen = 1;
4203 }
4204 ufile++; /* skip the dot */
4205 if (index (&ufile[1], '/'))
4206 *targ++ = '.';
4207 else
4208 *targ++ = ']';
4209 }
4210 else if (strncmp (ufile, "../", 3) == 0)
4211 {
4212 if (!slash_seen)
4213 {
4214 *targ++ = '[';
4215 slash_seen = 1;
4216 }
4217 *targ++ = '-';
4218 ufile += 2; /* skip the dots */
4219 if (index (&ufile[1], '/'))
4220 *targ++ = '.';
4221 else
4222 *targ++ = ']';
4223 }
4224 else
4225 *targ++ = *ufile;
4226 break;
4227
4228 default:
4229 *targ++ = *ufile;
4230 break;
4231 }
4232 ufile++;
4233 }
4234 *targ = '\0';
4235
4236 return utbuf;
4237 }
4238
4239 char *
4240 getwd (pathname)
4241 char *pathname;
4242 {
4243 char *ptr, *val;
4244 extern char *getcwd ();
4245
4246 #define MAXPATHLEN 1024
4247
4248 ptr = xmalloc (MAXPATHLEN);
4249 val = getcwd (ptr, MAXPATHLEN);
4250 if (val == 0)
4251 {
4252 xfree (ptr);
4253 return val;
4254 }
4255 strcpy (pathname, ptr);
4256 xfree (ptr);
4257
4258 return pathname;
4259 }
4260
4261 int
4262 getppid ()
4263 {
4264 long item_code = JPI$_OWNER;
4265 unsigned long parent_id;
4266 int status;
4267
4268 if (((status = LIB$GETJPI (&item_code, 0, 0, &parent_id)) & 1) == 0)
4269 {
4270 errno = EVMSERR;
4271 vaxc$errno = status;
4272 return -1;
4273 }
4274 return parent_id;
4275 }
4276
4277 #undef getuid
4278 unsigned
4279 sys_getuid ()
4280 {
4281 return (getgid () << 16) | getuid ();
4282 }
4283
4284 #undef read
4285 int
4286 sys_read (fildes, buf, nbyte)
4287 int fildes;
4288 char *buf;
4289 unsigned int nbyte;
4290 {
4291 return read (fildes, buf, (nbyte < MAXIOSIZE ? nbyte : MAXIOSIZE));
4292 }
4293
4294 #if 0
4295 int
4296 sys_write (fildes, buf, nbyte)
4297 int fildes;
4298 char *buf;
4299 unsigned int nbyte;
4300 {
4301 register int nwrote, rtnval = 0;
4302
4303 while (nbyte > MAXIOSIZE && (nwrote = write (fildes, buf, MAXIOSIZE)) > 0) {
4304 nbyte -= nwrote;
4305 buf += nwrote;
4306 rtnval += nwrote;
4307 }
4308 if (nwrote < 0)
4309 return rtnval ? rtnval : -1;
4310 if ((nwrote = write (fildes, buf, nbyte)) < 0)
4311 return rtnval ? rtnval : -1;
4312 return (rtnval + nwrote);
4313 }
4314 #endif /* 0 */
4315
4316 /*
4317 * VAX/VMS VAX C RTL really loses. It insists that records
4318 * end with a newline (carriage return) character, and if they
4319 * don't it adds one (nice of it isn't it!)
4320 *
4321 * Thus we do this stupidity below.
4322 */
4323
4324 #undef write
4325 int
4326 sys_write (fildes, buf, nbytes)
4327 int fildes;
4328 char *buf;
4329 unsigned int nbytes;
4330 {
4331 register char *p;
4332 register char *e;
4333 int sum = 0;
4334 struct stat st;
4335
4336 fstat (fildes, &st);
4337 p = buf;
4338 while (nbytes > 0)
4339 {
4340 int len, retval;
4341
4342 /* Handle fixed-length files with carriage control. */
4343 if (st.st_fab_rfm == FAB$C_FIX
4344 && ((st.st_fab_rat & (FAB$M_FTN | FAB$M_CR)) != 0))
4345 {
4346 len = st.st_fab_mrs;
4347 retval = write (fildes, p, min (len, nbytes));
4348 if (retval != len)
4349 return -1;
4350 retval++; /* This skips the implied carriage control */
4351 }
4352 else
4353 {
4354 e = p + min (MAXIOSIZE, nbytes) - 1;
4355 while (*e != '\n' && e > p) e--;
4356 if (p == e) /* Ok.. so here we add a newline... sigh. */
4357 e = p + min (MAXIOSIZE, nbytes) - 1;
4358 len = e + 1 - p;
4359 retval = write (fildes, p, len);
4360 if (retval != len)
4361 return -1;
4362 }
4363 p += retval;
4364 sum += retval;
4365 nbytes -= retval;
4366 }
4367 return sum;
4368 }
4369
4370 /* Create file NEW copying its attributes from file OLD. If
4371 OLD is 0 or does not exist, create based on the value of
4372 vms_stmlf_recfm. */
4373
4374 /* Protection value the file should ultimately have.
4375 Set by create_copy_attrs, and use by rename_sansversions. */
4376 static unsigned short int fab_final_pro;
4377
4378 int
4379 creat_copy_attrs (old, new)
4380 char *old, *new;
4381 {
4382 struct FAB fab = cc$rms_fab;
4383 struct XABPRO xabpro;
4384 char aclbuf[256]; /* Choice of size is arbitrary. See below. */
4385 extern int vms_stmlf_recfm;
4386
4387 if (old)
4388 {
4389 fab.fab$b_fac = FAB$M_GET;
4390 fab.fab$l_fna = old;
4391 fab.fab$b_fns = strlen (old);
4392 fab.fab$l_xab = (char *) &xabpro;
4393 xabpro = cc$rms_xabpro;
4394 xabpro.xab$l_aclbuf = aclbuf;
4395 xabpro.xab$w_aclsiz = sizeof aclbuf;
4396 /* Call $OPEN to fill in the fab & xabpro fields. */
4397 if (SYS$OPEN (&fab, 0, 0) & 1)
4398 {
4399 SYS$CLOSE (&fab, 0, 0);
4400 fab.fab$l_alq = 0; /* zero the allocation quantity */
4401 if (xabpro.xab$w_acllen > 0)
4402 {
4403 if (xabpro.xab$w_acllen > sizeof aclbuf)
4404 /* If the acl buffer was too short, redo open with longer one.
4405 Wouldn't need to do this if there were some system imposed
4406 limit on the size of an ACL, but I can't find any such. */
4407 {
4408 xabpro.xab$l_aclbuf = (char *) alloca (xabpro.xab$w_acllen);
4409 xabpro.xab$w_aclsiz = xabpro.xab$w_acllen;
4410 if (SYS$OPEN (&fab, 0, 0) & 1)
4411 SYS$CLOSE (&fab, 0, 0);
4412 else
4413 old = 0;
4414 }
4415 }
4416 else
4417 xabpro.xab$l_aclbuf = 0;
4418 }
4419 else
4420 old = 0;
4421 }
4422 fab.fab$l_fna = new;
4423 fab.fab$b_fns = strlen (new);
4424 if (!old)
4425 {
4426 fab.fab$l_xab = 0;
4427 fab.fab$b_rfm = vms_stmlf_recfm ? FAB$C_STMLF : FAB$C_VAR;
4428 fab.fab$b_rat = FAB$M_CR;
4429 }
4430
4431 /* Set the file protections such that we will be able to manipulate
4432 this file. Once we are done writing and renaming it, we will set
4433 the protections back. */
4434 if (old)
4435 fab_final_pro = xabpro.xab$w_pro;
4436 else
4437 SYS$SETDFPROT (0, &fab_final_pro);
4438 xabpro.xab$w_pro &= 0xff0f; /* set O:rewd for now. This is set back later. */
4439
4440 /* Create the new file with either default attrs or attrs copied
4441 from old file. */
4442 if (!(SYS$CREATE (&fab, 0, 0) & 1))
4443 return -1;
4444 SYS$CLOSE (&fab, 0, 0);
4445 /* As this is a "replacement" for creat, return a file descriptor
4446 opened for writing. */
4447 return open (new, O_WRONLY);
4448 }
4449
4450 #ifdef creat
4451 #undef creat
4452 #include <varargs.h>
4453 #ifdef __GNUC__
4454 #ifndef va_count
4455 #define va_count(X) ((X) = *(((int *) &(va_alist)) - 1))
4456 #endif
4457 #endif
4458
4459 int
4460 sys_creat (va_alist)
4461 va_dcl
4462 {
4463 va_list list_incrementer;
4464 char *name;
4465 int mode;
4466 int rfd; /* related file descriptor */
4467 int fd; /* Our new file descriptor */
4468 int count;
4469 struct stat st_buf;
4470 char rfm[12];
4471 char rat[15];
4472 char mrs[13];
4473 char fsz[13];
4474 extern int vms_stmlf_recfm;
4475
4476 va_count (count);
4477 va_start (list_incrementer);
4478 name = va_arg (list_incrementer, char *);
4479 mode = va_arg (list_incrementer, int);
4480 if (count > 2)
4481 rfd = va_arg (list_incrementer, int);
4482 va_end (list_incrementer);
4483 if (count > 2)
4484 {
4485 /* Use information from the related file descriptor to set record
4486 format of the newly created file. */
4487 fstat (rfd, &st_buf);
4488 switch (st_buf.st_fab_rfm)
4489 {
4490 case FAB$C_FIX:
4491 strcpy (rfm, "rfm = fix");
4492 sprintf (mrs, "mrs = %d", st_buf.st_fab_mrs);
4493 strcpy (rat, "rat = ");
4494 if (st_buf.st_fab_rat & FAB$M_CR)
4495 strcat (rat, "cr");
4496 else if (st_buf.st_fab_rat & FAB$M_FTN)
4497 strcat (rat, "ftn");
4498 else if (st_buf.st_fab_rat & FAB$M_PRN)
4499 strcat (rat, "prn");
4500 if (st_buf.st_fab_rat & FAB$M_BLK)
4501 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4502 strcat (rat, ", blk");
4503 else
4504 strcat (rat, "blk");
4505 return creat (name, 0, rfm, rat, mrs);
4506
4507 case FAB$C_VFC:
4508 strcpy (rfm, "rfm = vfc");
4509 sprintf (fsz, "fsz = %d", st_buf.st_fab_fsz);
4510 strcpy (rat, "rat = ");
4511 if (st_buf.st_fab_rat & FAB$M_CR)
4512 strcat (rat, "cr");
4513 else if (st_buf.st_fab_rat & FAB$M_FTN)
4514 strcat (rat, "ftn");
4515 else if (st_buf.st_fab_rat & FAB$M_PRN)
4516 strcat (rat, "prn");
4517 if (st_buf.st_fab_rat & FAB$M_BLK)
4518 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4519 strcat (rat, ", blk");
4520 else
4521 strcat (rat, "blk");
4522 return creat (name, 0, rfm, rat, fsz);
4523
4524 case FAB$C_STM:
4525 strcpy (rfm, "rfm = stm");
4526 break;
4527
4528 case FAB$C_STMCR:
4529 strcpy (rfm, "rfm = stmcr");
4530 break;
4531
4532 case FAB$C_STMLF:
4533 strcpy (rfm, "rfm = stmlf");
4534 break;
4535
4536 case FAB$C_UDF:
4537 strcpy (rfm, "rfm = udf");
4538 break;
4539
4540 case FAB$C_VAR:
4541 strcpy (rfm, "rfm = var");
4542 break;
4543 }
4544 strcpy (rat, "rat = ");
4545 if (st_buf.st_fab_rat & FAB$M_CR)
4546 strcat (rat, "cr");
4547 else if (st_buf.st_fab_rat & FAB$M_FTN)
4548 strcat (rat, "ftn");
4549 else if (st_buf.st_fab_rat & FAB$M_PRN)
4550 strcat (rat, "prn");
4551 if (st_buf.st_fab_rat & FAB$M_BLK)
4552 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4553 strcat (rat, ", blk");
4554 else
4555 strcat (rat, "blk");
4556 }
4557 else
4558 {
4559 strcpy (rfm, vms_stmlf_recfm ? "rfm = stmlf" : "rfm=var");
4560 strcpy (rat, "rat=cr");
4561 }
4562 /* Until the VAX C RTL fixes the many bugs with modes, always use
4563 mode 0 to get the user's default protection. */
4564 fd = creat (name, 0, rfm, rat);
4565 if (fd < 0 && errno == EEXIST)
4566 {
4567 if (unlink (name) < 0)
4568 report_file_error ("delete", build_string (name));
4569 fd = creat (name, 0, rfm, rat);
4570 }
4571 return fd;
4572 }
4573 #endif /* creat */
4574
4575 /* fwrite to stdout is S L O W. Speed it up by using fputc...*/
4576 int
4577 sys_fwrite (ptr, size, num, fp)
4578 register char * ptr;
4579 FILE * fp;
4580 {
4581 register int tot = num * size;
4582
4583 while (tot--)
4584 fputc (*ptr++, fp);
4585 return num;
4586 }
4587
4588 /*
4589 * The VMS C library routine creat actually creates a new version of an
4590 * existing file rather than truncating the old version. There are times
4591 * when this is not the desired behavior, for instance, when writing an
4592 * auto save file (you only want one version), or when you don't have
4593 * write permission in the directory containing the file (but the file
4594 * itself is writable). Hence this routine, which is equivalent to
4595 * "close (creat (fn, 0));" on Unix if fn already exists.
4596 */
4597 int
4598 vms_truncate (fn)
4599 char *fn;
4600 {
4601 struct FAB xfab = cc$rms_fab;
4602 struct RAB xrab = cc$rms_rab;
4603 int status;
4604
4605 xfab.fab$l_fop = FAB$M_TEF; /* free allocated but unused blocks on close */
4606 xfab.fab$b_fac = FAB$M_TRN | FAB$M_GET; /* allow truncate and get access */
4607 xfab.fab$b_shr = FAB$M_NIL; /* allow no sharing - file must be locked */
4608 xfab.fab$l_fna = fn;
4609 xfab.fab$b_fns = strlen (fn);
4610 xfab.fab$l_dna = ";0"; /* default to latest version of the file */
4611 xfab.fab$b_dns = 2;
4612 xrab.rab$l_fab = &xfab;
4613
4614 /* This gibberish opens the file, positions to the first record, and
4615 deletes all records from there until the end of file. */
4616 if ((SYS$OPEN (&xfab) & 01) == 01)
4617 {
4618 if ((SYS$CONNECT (&xrab) & 01) == 01 &&
4619 (SYS$FIND (&xrab) & 01) == 01 &&
4620 (SYS$TRUNCATE (&xrab) & 01) == 01)
4621 status = 0;
4622 else
4623 status = -1;
4624 }
4625 else
4626 status = -1;
4627 SYS$CLOSE (&xfab);
4628 return status;
4629 }
4630
4631 /* Define this symbol to actually read SYSUAF.DAT. This requires either
4632 SYSPRV or a readable SYSUAF.DAT. */
4633
4634 #ifdef READ_SYSUAF
4635 /*
4636 * getuaf.c
4637 *
4638 * Routine to read the VMS User Authorization File and return
4639 * a specific user's record.
4640 */
4641
4642 static struct UAF retuaf;
4643
4644 struct UAF *
4645 get_uaf_name (uname)
4646 char * uname;
4647 {
4648 register status;
4649 struct FAB uaf_fab;
4650 struct RAB uaf_rab;
4651
4652 uaf_fab = cc$rms_fab;
4653 uaf_rab = cc$rms_rab;
4654 /* initialize fab fields */
4655 uaf_fab.fab$l_fna = "SYS$SYSTEM:SYSUAF.DAT";
4656 uaf_fab.fab$b_fns = 21;
4657 uaf_fab.fab$b_fac = FAB$M_GET;
4658 uaf_fab.fab$b_org = FAB$C_IDX;
4659 uaf_fab.fab$b_shr = FAB$M_GET|FAB$M_PUT|FAB$M_UPD|FAB$M_DEL;
4660 /* initialize rab fields */
4661 uaf_rab.rab$l_fab = &uaf_fab;
4662 /* open the User Authorization File */
4663 status = SYS$OPEN (&uaf_fab);
4664 if (!(status&1))
4665 {
4666 errno = EVMSERR;
4667 vaxc$errno = status;
4668 return 0;
4669 }
4670 status = SYS$CONNECT (&uaf_rab);
4671 if (!(status&1))
4672 {
4673 errno = EVMSERR;
4674 vaxc$errno = status;
4675 return 0;
4676 }
4677 /* read the requested record - index is in uname */
4678 uaf_rab.rab$l_kbf = uname;
4679 uaf_rab.rab$b_ksz = strlen (uname);
4680 uaf_rab.rab$b_rac = RAB$C_KEY;
4681 uaf_rab.rab$l_ubf = (char *)&retuaf;
4682 uaf_rab.rab$w_usz = sizeof retuaf;
4683 status = SYS$GET (&uaf_rab);
4684 if (!(status&1))
4685 {
4686 errno = EVMSERR;
4687 vaxc$errno = status;
4688 return 0;
4689 }
4690 /* close the User Authorization File */
4691 status = SYS$DISCONNECT (&uaf_rab);
4692 if (!(status&1))
4693 {
4694 errno = EVMSERR;
4695 vaxc$errno = status;
4696 return 0;
4697 }
4698 status = SYS$CLOSE (&uaf_fab);
4699 if (!(status&1))
4700 {
4701 errno = EVMSERR;
4702 vaxc$errno = status;
4703 return 0;
4704 }
4705 return &retuaf;
4706 }
4707
4708 struct UAF *
4709 get_uaf_uic (uic)
4710 unsigned long uic;
4711 {
4712 register status;
4713 struct FAB uaf_fab;
4714 struct RAB uaf_rab;
4715
4716 uaf_fab = cc$rms_fab;
4717 uaf_rab = cc$rms_rab;
4718 /* initialize fab fields */
4719 uaf_fab.fab$l_fna = "SYS$SYSTEM:SYSUAF.DAT";
4720 uaf_fab.fab$b_fns = 21;
4721 uaf_fab.fab$b_fac = FAB$M_GET;
4722 uaf_fab.fab$b_org = FAB$C_IDX;
4723 uaf_fab.fab$b_shr = FAB$M_GET|FAB$M_PUT|FAB$M_UPD|FAB$M_DEL;
4724 /* initialize rab fields */
4725 uaf_rab.rab$l_fab = &uaf_fab;
4726 /* open the User Authorization File */
4727 status = SYS$OPEN (&uaf_fab);
4728 if (!(status&1))
4729 {
4730 errno = EVMSERR;
4731 vaxc$errno = status;
4732 return 0;
4733 }
4734 status = SYS$CONNECT (&uaf_rab);
4735 if (!(status&1))
4736 {
4737 errno = EVMSERR;
4738 vaxc$errno = status;
4739 return 0;
4740 }
4741 /* read the requested record - index is in uic */
4742 uaf_rab.rab$b_krf = 1; /* 1st alternate key */
4743 uaf_rab.rab$l_kbf = (char *) &uic;
4744 uaf_rab.rab$b_ksz = sizeof uic;
4745 uaf_rab.rab$b_rac = RAB$C_KEY;
4746 uaf_rab.rab$l_ubf = (char *)&retuaf;
4747 uaf_rab.rab$w_usz = sizeof retuaf;
4748 status = SYS$GET (&uaf_rab);
4749 if (!(status&1))
4750 {
4751 errno = EVMSERR;
4752 vaxc$errno = status;
4753 return 0;
4754 }
4755 /* close the User Authorization File */
4756 status = SYS$DISCONNECT (&uaf_rab);
4757 if (!(status&1))
4758 {
4759 errno = EVMSERR;
4760 vaxc$errno = status;
4761 return 0;
4762 }
4763 status = SYS$CLOSE (&uaf_fab);
4764 if (!(status&1))
4765 {
4766 errno = EVMSERR;
4767 vaxc$errno = status;
4768 return 0;
4769 }
4770 return &retuaf;
4771 }
4772
4773 static struct passwd retpw;
4774
4775 struct passwd *
4776 cnv_uaf_pw (up)
4777 struct UAF * up;
4778 {
4779 char * ptr;
4780
4781 /* copy these out first because if the username is 32 chars, the next
4782 section will overwrite the first byte of the UIC */
4783 retpw.pw_uid = up->uaf$w_mem;
4784 retpw.pw_gid = up->uaf$w_grp;
4785
4786 /* I suppose this is not the best style, to possibly overwrite one
4787 byte beyond the end of the field, but what the heck... */
4788 ptr = &up->uaf$t_username[UAF$S_USERNAME];
4789 while (ptr[-1] == ' ')
4790 ptr--;
4791 *ptr = '\0';
4792 strcpy (retpw.pw_name, up->uaf$t_username);
4793
4794 /* the rest of these are counted ascii strings */
4795 strncpy (retpw.pw_gecos, &up->uaf$t_owner[1], up->uaf$t_owner[0]);
4796 retpw.pw_gecos[up->uaf$t_owner[0]] = '\0';
4797 strncpy (retpw.pw_dir, &up->uaf$t_defdev[1], up->uaf$t_defdev[0]);
4798 retpw.pw_dir[up->uaf$t_defdev[0]] = '\0';
4799 strncat (retpw.pw_dir, &up->uaf$t_defdir[1], up->uaf$t_defdir[0]);
4800 retpw.pw_dir[up->uaf$t_defdev[0] + up->uaf$t_defdir[0]] = '\0';
4801 strncpy (retpw.pw_shell, &up->uaf$t_defcli[1], up->uaf$t_defcli[0]);
4802 retpw.pw_shell[up->uaf$t_defcli[0]] = '\0';
4803
4804 return &retpw;
4805 }
4806 #else /* not READ_SYSUAF */
4807 static struct passwd retpw;
4808 #endif /* not READ_SYSUAF */
4809
4810 struct passwd *
4811 getpwnam (name)
4812 char * name;
4813 {
4814 #ifdef READ_SYSUAF
4815 struct UAF *up;
4816 #else
4817 char * user;
4818 char * dir;
4819 unsigned char * full;
4820 #endif /* READ_SYSUAF */
4821 char *ptr = name;
4822
4823 while (*ptr)
4824 {
4825 if ('a' <= *ptr && *ptr <= 'z')
4826 *ptr -= 040;
4827 ptr++;
4828 }
4829 #ifdef READ_SYSUAF
4830 if (!(up = get_uaf_name (name)))
4831 return 0;
4832 return cnv_uaf_pw (up);
4833 #else
4834 if (strcmp (name, getenv ("USER")) == 0)
4835 {
4836 retpw.pw_uid = getuid ();
4837 retpw.pw_gid = getgid ();
4838 strcpy (retpw.pw_name, name);
4839 if (full = egetenv ("FULLNAME"))
4840 strcpy (retpw.pw_gecos, full);
4841 else
4842 *retpw.pw_gecos = '\0';
4843 strcpy (retpw.pw_dir, egetenv ("HOME"));
4844 *retpw.pw_shell = '\0';
4845 return &retpw;
4846 }
4847 else
4848 return 0;
4849 #endif /* not READ_SYSUAF */
4850 }
4851
4852 struct passwd *
4853 getpwuid (uid)
4854 unsigned long uid;
4855 {
4856 #ifdef READ_SYSUAF
4857 struct UAF * up;
4858
4859 if (!(up = get_uaf_uic (uid)))
4860 return 0;
4861 return cnv_uaf_pw (up);
4862 #else
4863 if (uid == sys_getuid ())
4864 return getpwnam (egetenv ("USER"));
4865 else
4866 return 0;
4867 #endif /* not READ_SYSUAF */
4868 }
4869
4870 /* return total address space available to the current process. This is
4871 the sum of the current p0 size, p1 size and free page table entries
4872 available. */
4873 int
4874 vlimit ()
4875 {
4876 int item_code;
4877 unsigned long free_pages;
4878 unsigned long frep0va;
4879 unsigned long frep1va;
4880 register status;
4881
4882 item_code = JPI$_FREPTECNT;
4883 if (((status = LIB$GETJPI (&item_code, 0, 0, &free_pages)) & 1) == 0)
4884 {
4885 errno = EVMSERR;
4886 vaxc$errno = status;
4887 return -1;
4888 }
4889 free_pages *= 512;
4890
4891 item_code = JPI$_FREP0VA;
4892 if (((status = LIB$GETJPI (&item_code, 0, 0, &frep0va)) & 1) == 0)
4893 {
4894 errno = EVMSERR;
4895 vaxc$errno = status;
4896 return -1;
4897 }
4898 item_code = JPI$_FREP1VA;
4899 if (((status = LIB$GETJPI (&item_code, 0, 0, &frep1va)) & 1) == 0)
4900 {
4901 errno = EVMSERR;
4902 vaxc$errno = status;
4903 return -1;
4904 }
4905
4906 return free_pages + frep0va + (0x7fffffff - frep1va);
4907 }
4908
4909 int
4910 define_logical_name (varname, string)
4911 char *varname;
4912 char *string;
4913 {
4914 struct dsc$descriptor_s strdsc =
4915 {strlen (string), DSC$K_DTYPE_T, DSC$K_CLASS_S, string};
4916 struct dsc$descriptor_s envdsc =
4917 {strlen (varname), DSC$K_DTYPE_T, DSC$K_CLASS_S, varname};
4918 struct dsc$descriptor_s lnmdsc =
4919 {7, DSC$K_DTYPE_T, DSC$K_CLASS_S, "LNM$JOB"};
4920
4921 return LIB$SET_LOGICAL (&envdsc, &strdsc, &lnmdsc, 0, 0);
4922 }
4923
4924 int
4925 delete_logical_name (varname)
4926 char *varname;
4927 {
4928 struct dsc$descriptor_s envdsc =
4929 {strlen (varname), DSC$K_DTYPE_T, DSC$K_CLASS_S, varname};
4930 struct dsc$descriptor_s lnmdsc =
4931 {7, DSC$K_DTYPE_T, DSC$K_CLASS_S, "LNM$JOB"};
4932
4933 return LIB$DELETE_LOGICAL (&envdsc, &lnmdsc);
4934 }
4935
4936 int
4937 ulimit ()
4938 {
4939 return 0;
4940 }
4941
4942 int
4943 setpgrp ()
4944 {
4945 return 0;
4946 }
4947
4948 int
4949 execvp ()
4950 {
4951 error ("execvp system call not implemented");
4952 return -1;
4953 }
4954
4955 int
4956 rename (from, to)
4957 char *from, *to;
4958 {
4959 int status;
4960 struct FAB from_fab = cc$rms_fab, to_fab = cc$rms_fab;
4961 struct NAM from_nam = cc$rms_nam, to_nam = cc$rms_nam;
4962 char from_esn[NAM$C_MAXRSS];
4963 char to_esn[NAM$C_MAXRSS];
4964
4965 from_fab.fab$l_fna = from;
4966 from_fab.fab$b_fns = strlen (from);
4967 from_fab.fab$l_nam = &from_nam;
4968 from_fab.fab$l_fop = FAB$M_NAM;
4969
4970 from_nam.nam$l_esa = from_esn;
4971 from_nam.nam$b_ess = sizeof from_esn;
4972
4973 to_fab.fab$l_fna = to;
4974 to_fab.fab$b_fns = strlen (to);
4975 to_fab.fab$l_nam = &to_nam;
4976 to_fab.fab$l_fop = FAB$M_NAM;
4977
4978 to_nam.nam$l_esa = to_esn;
4979 to_nam.nam$b_ess = sizeof to_esn;
4980
4981 status = SYS$RENAME (&from_fab, 0, 0, &to_fab);
4982
4983 if (status & 1)
4984 return 0;
4985 else
4986 {
4987 if (status == RMS$_DEV)
4988 errno = EXDEV;
4989 else
4990 errno = EVMSERR;
4991 vaxc$errno = status;
4992 return -1;
4993 }
4994 }
4995
4996 /* This function renames a file like `rename', but it strips
4997 the version number from the "to" filename, such that the "to" file is
4998 will always be a new version. It also sets the file protection once it is
4999 finished. The protection that we will use is stored in fab_final_pro,
5000 and was set when we did a creat_copy_attrs to create the file that we
5001 are renaming.
5002
5003 We could use the chmod function, but Eunichs uses 3 bits per user category
5004 to describe the protection, and VMS uses 4 (write and delete are separate
5005 bits). To maintain portability, the VMS implementation of `chmod' wires
5006 the W and D bits together. */
5007
5008
5009 static struct fibdef fib; /* We need this initialized to zero */
5010 char vms_file_written[NAM$C_MAXRSS];
5011
5012 int
5013 rename_sans_version (from,to)
5014 char *from, *to;
5015 {
5016 short int chan;
5017 int stat;
5018 short int iosb[4];
5019 int status;
5020 struct FAB to_fab = cc$rms_fab;
5021 struct NAM to_nam = cc$rms_nam;
5022 struct dsc$descriptor fib_d ={sizeof (fib),0,0,(char*) &fib};
5023 struct dsc$descriptor fib_attr[2]
5024 = {{sizeof (fab_final_pro),ATR$C_FPRO,0,(char*) &fab_final_pro},{0,0,0,0}};
5025 char to_esn[NAM$C_MAXRSS];
5026
5027 $DESCRIPTOR (disk,to_esn);
5028
5029 to_fab.fab$l_fna = to;
5030 to_fab.fab$b_fns = strlen (to);
5031 to_fab.fab$l_nam = &to_nam;
5032 to_fab.fab$l_fop = FAB$M_NAM;
5033
5034 to_nam.nam$l_esa = to_esn;
5035 to_nam.nam$b_ess = sizeof to_esn;
5036
5037 status = SYS$PARSE (&to_fab, 0, 0); /* figure out the full file name */
5038
5039 if (to_nam.nam$l_fnb && NAM$M_EXP_VER)
5040 *(to_nam.nam$l_ver) = '\0';
5041
5042 stat = rename (from, to_esn);
5043 if (stat < 0)
5044 return stat;
5045
5046 strcpy (vms_file_written, to_esn);
5047
5048 to_fab.fab$l_fna = vms_file_written; /* this points to the versionless name */
5049 to_fab.fab$b_fns = strlen (vms_file_written);
5050
5051 /* Now set the file protection to the correct value */
5052 SYS$OPEN (&to_fab, 0, 0); /* This fills in the nam$w_fid fields */
5053
5054 /* Copy these fields into the fib */
5055 fib.fib$r_fid_overlay.fib$w_fid[0] = to_nam.nam$w_fid[0];
5056 fib.fib$r_fid_overlay.fib$w_fid[1] = to_nam.nam$w_fid[1];
5057 fib.fib$r_fid_overlay.fib$w_fid[2] = to_nam.nam$w_fid[2];
5058
5059 SYS$CLOSE (&to_fab, 0, 0);
5060
5061 stat = SYS$ASSIGN (&disk, &chan, 0, 0); /* open a channel to the disk */
5062 if (!stat)
5063 LIB$SIGNAL (stat);
5064 stat = SYS$QIOW (0, chan, IO$_MODIFY, iosb, 0, 0, &fib_d,
5065 0, 0, 0, &fib_attr, 0);
5066 if (!stat)
5067 LIB$SIGNAL (stat);
5068 stat = SYS$DASSGN (chan);
5069 if (!stat)
5070 LIB$SIGNAL (stat);
5071 strcpy (vms_file_written, to_esn); /* We will write this to the terminal*/
5072 return 0;
5073 }
5074
5075 int
5076 link (file, new)
5077 char * file, * new;
5078 {
5079 register status;
5080 struct FAB fab;
5081 struct NAM nam;
5082 unsigned short fid[3];
5083 char esa[NAM$C_MAXRSS];
5084
5085 fab = cc$rms_fab;
5086 fab.fab$l_fop = FAB$M_OFP;
5087 fab.fab$l_fna = file;
5088 fab.fab$b_fns = strlen (file);
5089 fab.fab$l_nam = &nam;
5090
5091 nam = cc$rms_nam;
5092 nam.nam$l_esa = esa;
5093 nam.nam$b_ess = NAM$C_MAXRSS;
5094
5095 status = SYS$PARSE (&fab);
5096 if ((status & 1) == 0)
5097 {
5098 errno = EVMSERR;
5099 vaxc$errno = status;
5100 return -1;
5101 }
5102 status = SYS$SEARCH (&fab);
5103 if ((status & 1) == 0)
5104 {
5105 errno = EVMSERR;
5106 vaxc$errno = status;
5107 return -1;
5108 }
5109
5110 fid[0] = nam.nam$w_fid[0];
5111 fid[1] = nam.nam$w_fid[1];
5112 fid[2] = nam.nam$w_fid[2];
5113
5114 fab.fab$l_fna = new;
5115 fab.fab$b_fns = strlen (new);
5116
5117 status = SYS$PARSE (&fab);
5118 if ((status & 1) == 0)
5119 {
5120 errno = EVMSERR;
5121 vaxc$errno = status;
5122 return -1;
5123 }
5124
5125 nam.nam$w_fid[0] = fid[0];
5126 nam.nam$w_fid[1] = fid[1];
5127 nam.nam$w_fid[2] = fid[2];
5128
5129 nam.nam$l_esa = nam.nam$l_name;
5130 nam.nam$b_esl = nam.nam$b_name + nam.nam$b_type + nam.nam$b_ver;
5131
5132 status = SYS$ENTER (&fab);
5133 if ((status & 1) == 0)
5134 {
5135 errno = EVMSERR;
5136 vaxc$errno = status;
5137 return -1;
5138 }
5139
5140 return 0;
5141 }
5142
5143 void
5144 croak (badfunc)
5145 char *badfunc;
5146 {
5147 printf ("%s not yet implemented\r\n", badfunc);
5148 reset_sys_modes ();
5149 exit (1);
5150 }
5151
5152 long
5153 random ()
5154 {
5155 /* Arrange to return a range centered on zero. */
5156 return rand () - (1 << 30);
5157 }
5158
5159 void
5160 srandom (seed)
5161 {
5162 srand (seed);
5163 }
5164 #endif /* VMS */
5165 \f
5166 #ifdef AIXHFT
5167
5168 /* Called from init_sys_modes. */
5169 void
5170 hft_init ()
5171 {
5172 int junk;
5173
5174 /* If we're not on an HFT we shouldn't do any of this. We determine
5175 if we are on an HFT by trying to get an HFT error code. If this
5176 call fails, we're not on an HFT. */
5177 #ifdef IBMR2AIX
5178 if (ioctl (0, HFQERROR, &junk) < 0)
5179 return;
5180 #else /* not IBMR2AIX */
5181 if (ioctl (0, HFQEIO, 0) < 0)
5182 return;
5183 #endif /* not IBMR2AIX */
5184
5185 /* On AIX the default hft keyboard mapping uses backspace rather than delete
5186 as the rubout key's ASCII code. Here this is changed. The bug is that
5187 there's no way to determine the old mapping, so in reset_sys_modes
5188 we need to assume that the normal map had been present. Of course, this
5189 code also doesn't help if on a terminal emulator which doesn't understand
5190 HFT VTD's. */
5191 {
5192 struct hfbuf buf;
5193 struct hfkeymap keymap;
5194
5195 buf.hf_bufp = (char *)&keymap;
5196 buf.hf_buflen = sizeof (keymap);
5197 keymap.hf_nkeys = 2;
5198 keymap.hfkey[0].hf_kpos = 15;
5199 keymap.hfkey[0].hf_kstate = HFMAPCHAR | HFSHFNONE;
5200 #ifdef IBMR2AIX
5201 keymap.hfkey[0].hf_keyidh = '<';
5202 #else /* not IBMR2AIX */
5203 keymap.hfkey[0].hf_page = '<';
5204 #endif /* not IBMR2AIX */
5205 keymap.hfkey[0].hf_char = 127;
5206 keymap.hfkey[1].hf_kpos = 15;
5207 keymap.hfkey[1].hf_kstate = HFMAPCHAR | HFSHFSHFT;
5208 #ifdef IBMR2AIX
5209 keymap.hfkey[1].hf_keyidh = '<';
5210 #else /* not IBMR2AIX */
5211 keymap.hfkey[1].hf_page = '<';
5212 #endif /* not IBMR2AIX */
5213 keymap.hfkey[1].hf_char = 127;
5214 hftctl (0, HFSKBD, &buf);
5215 }
5216 /* The HFT system on AIX doesn't optimize for scrolling, so it's really ugly
5217 at times. */
5218 line_ins_del_ok = char_ins_del_ok = 0;
5219 }
5220
5221 /* Reset the rubout key to backspace. */
5222
5223 void
5224 hft_reset ()
5225 {
5226 struct hfbuf buf;
5227 struct hfkeymap keymap;
5228 int junk;
5229
5230 #ifdef IBMR2AIX
5231 if (ioctl (0, HFQERROR, &junk) < 0)
5232 return;
5233 #else /* not IBMR2AIX */
5234 if (ioctl (0, HFQEIO, 0) < 0)
5235 return;
5236 #endif /* not IBMR2AIX */
5237
5238 buf.hf_bufp = (char *)&keymap;
5239 buf.hf_buflen = sizeof (keymap);
5240 keymap.hf_nkeys = 2;
5241 keymap.hfkey[0].hf_kpos = 15;
5242 keymap.hfkey[0].hf_kstate = HFMAPCHAR | HFSHFNONE;
5243 #ifdef IBMR2AIX
5244 keymap.hfkey[0].hf_keyidh = '<';
5245 #else /* not IBMR2AIX */
5246 keymap.hfkey[0].hf_page = '<';
5247 #endif /* not IBMR2AIX */
5248 keymap.hfkey[0].hf_char = 8;
5249 keymap.hfkey[1].hf_kpos = 15;
5250 keymap.hfkey[1].hf_kstate = HFMAPCHAR | HFSHFSHFT;
5251 #ifdef IBMR2AIX
5252 keymap.hfkey[1].hf_keyidh = '<';
5253 #else /* not IBMR2AIX */
5254 keymap.hfkey[1].hf_page = '<';
5255 #endif /* not IBMR2AIX */
5256 keymap.hfkey[1].hf_char = 8;
5257 hftctl (0, HFSKBD, &buf);
5258 }
5259
5260 #endif /* AIXHFT */
5261
5262 #ifdef USE_DL_STUBS
5263
5264 /* These are included on Sunos 4.1 when we do not use shared libraries.
5265 X11 libraries may refer to these functions but (we hope) do not
5266 actually call them. */
5267
5268 void *
5269 dlopen ()
5270 {
5271 return 0;
5272 }
5273
5274 void *
5275 dlsym ()
5276 {
5277 return 0;
5278 }
5279
5280 int
5281 dlclose ()
5282 {
5283 return -1;
5284 }
5285
5286 #endif /* USE_DL_STUBS */
5287 \f
5288 #ifndef BSTRING
5289
5290 #ifndef bzero
5291
5292 void
5293 bzero (b, length)
5294 register char *b;
5295 register int length;
5296 {
5297 #ifdef VMS
5298 short zero = 0;
5299 long max_str = 65535;
5300
5301 while (length > max_str) {
5302 (void) LIB$MOVC5 (&zero, &zero, &zero, &max_str, b);
5303 length -= max_str;
5304 b += max_str;
5305 }
5306 max_str = length;
5307 (void) LIB$MOVC5 (&zero, &zero, &zero, &max_str, b);
5308 #else
5309 while (length-- > 0)
5310 *b++ = 0;
5311 #endif /* not VMS */
5312 }
5313
5314 #endif /* no bzero */
5315 #endif /* BSTRING */
5316
5317 #if (!defined (BSTRING) && !defined (bcopy)) || defined (NEED_BCOPY)
5318 #undef bcopy
5319
5320 /* Saying `void' requires a declaration, above, where bcopy is used
5321 and that declaration causes pain for systems where bcopy is a macro. */
5322 bcopy (b1, b2, length)
5323 register char *b1;
5324 register char *b2;
5325 register int length;
5326 {
5327 #ifdef VMS
5328 long max_str = 65535;
5329
5330 while (length > max_str) {
5331 (void) LIB$MOVC3 (&max_str, b1, b2);
5332 length -= max_str;
5333 b1 += max_str;
5334 b2 += max_str;
5335 }
5336 max_str = length;
5337 (void) LIB$MOVC3 (&length, b1, b2);
5338 #else
5339 while (length-- > 0)
5340 *b2++ = *b1++;
5341 #endif /* not VMS */
5342 }
5343 #endif /* (!defined (BSTRING) && !defined (bcopy)) || defined (NEED_BCOPY) */
5344
5345 #ifndef BSTRING
5346 #ifndef bcmp
5347 int
5348 bcmp (b1, b2, length) /* This could be a macro! */
5349 register char *b1;
5350 register char *b2;
5351 register int length;
5352 {
5353 #ifdef VMS
5354 struct dsc$descriptor_s src1 = {length, DSC$K_DTYPE_T, DSC$K_CLASS_S, b1};
5355 struct dsc$descriptor_s src2 = {length, DSC$K_DTYPE_T, DSC$K_CLASS_S, b2};
5356
5357 return STR$COMPARE (&src1, &src2);
5358 #else
5359 while (length-- > 0)
5360 if (*b1++ != *b2++)
5361 return 1;
5362
5363 return 0;
5364 #endif /* not VMS */
5365 }
5366 #endif /* no bcmp */
5367 #endif /* not BSTRING */
5368 \f
5369 #ifndef HAVE_STRSIGNAL
5370 char *
5371 strsignal (code)
5372 int code;
5373 {
5374 char *signame = 0;
5375
5376 if (0 <= code && code < NSIG)
5377 {
5378 #ifdef VMS
5379 signame = sys_errlist[code];
5380 #else
5381 /* Cast to suppress warning if the table has const char *. */
5382 signame = (char *) sys_siglist[code];
5383 #endif
5384 }
5385
5386 return signame;
5387 }
5388 #endif /* HAVE_STRSIGNAL */
5389
5390 /* arch-tag: edb43589-4e09-4544-b325-978b5b121dcf
5391 (do not change this comment) */