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