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[bpt/emacs.git] / src / sysdep.c
1 /* Interfaces to system-dependent kernel and library entries.
2 Copyright (C) 1985, 1986, 1987, 1988, 1993, 1994, 1995, 1999, 2000, 2001,
3 2002, 2003, 2004, 2005, 2006, 2007, 2008
4 Free Software Foundation, Inc.
5
6 This file is part of GNU Emacs.
7
8 GNU Emacs is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3, or (at your option)
11 any later version.
12
13 GNU Emacs is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with GNU Emacs; see the file COPYING. If not, write to
20 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
21 Boston, MA 02110-1301, USA. */
22
23 #ifdef HAVE_CONFIG_H
24 #include <config.h>
25 #endif
26
27 #include <signal.h>
28 #include <stdio.h>
29 #include <setjmp.h>
30 #ifdef HAVE_UNISTD_H
31 #include <unistd.h>
32 #endif
33 #include "lisp.h"
34 /* Including stdlib.h isn't necessarily enough to get srandom
35 declared, e.g. without __USE_XOPEN_EXTENDED with glibc 2. */
36 #ifdef HAVE_RANDOM
37 #if 0 /* Don't prototype srandom; it takes an unsigned argument on
38 some systems, and an unsigned long on others, like FreeBSD
39 4.1. */
40 extern void srandom P_ ((unsigned int));
41 #endif
42 #endif
43
44 /* The w32 build defines select stuff in w32.h, which is included by
45 sys/select.h (included below). */
46 #ifndef WINDOWSNT
47 #include "sysselect.h"
48 #endif
49
50 #include "blockinput.h"
51
52 #ifdef WINDOWSNT
53 #define read sys_read
54 #define write sys_write
55 #include <windows.h>
56 #ifndef NULL
57 #define NULL 0
58 #endif
59 #endif /* not WINDOWSNT */
60
61 /* Does anyone other than VMS need this? */
62 #ifndef fwrite
63 #define sys_fwrite fwrite
64 #else
65 #undef fwrite
66 #endif
67
68 #include <sys/types.h>
69 #include <sys/stat.h>
70 #include <errno.h>
71
72 #ifdef HAVE_SETPGID
73 #if !defined (USG) || defined (BSD_PGRPS)
74 #undef setpgrp
75 #define setpgrp setpgid
76 #endif
77 #endif
78
79 /* Get SI_SRPC_DOMAIN, if it is available. */
80 #ifdef HAVE_SYS_SYSTEMINFO_H
81 #include <sys/systeminfo.h>
82 #endif
83
84 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida, MW Aug 1993 */
85 #include <dos.h>
86 #include "dosfns.h"
87 #include "msdos.h"
88 #include <sys/param.h>
89
90 #if __DJGPP__ > 1
91 extern int etext;
92 extern unsigned start __asm__ ("start");
93 #endif
94 #endif
95
96 #ifndef USE_CRT_DLL
97 #ifndef errno
98 extern int errno;
99 #endif
100 #endif
101
102 #ifdef VMS
103 #include <rms.h>
104 #include <ttdef.h>
105 #include <tt2def.h>
106 #include <iodef.h>
107 #include <ssdef.h>
108 #include <descrip.h>
109 #include <fibdef.h>
110 #include <atrdef.h>
111 #include <ctype.h>
112 #include <string.h>
113 #ifdef __GNUC__
114 #include <sys/file.h>
115 #else
116 #include <file.h>
117 #endif
118 #undef F_SETFL
119 #ifndef RAB$C_BID
120 #include <rab.h>
121 #endif
122 #define MAXIOSIZE (32 * PAGESIZE) /* Don't I/O more than 32 blocks at a time */
123 #endif /* VMS */
124
125 #ifndef VMS
126 #include <sys/file.h>
127 #endif /* not VMS */
128
129 #ifdef HAVE_FCNTL_H
130 #include <fcntl.h>
131 #endif
132
133 #ifndef MSDOS
134 #include <sys/ioctl.h>
135 #endif
136
137 #include "systty.h"
138 #include "syswait.h"
139
140 #ifdef BROKEN_TIOCGWINSZ
141 #undef TIOCGWINSZ
142 #undef TIOCSWINSZ
143 #endif
144
145 #if defined (USG)
146 #include <sys/utsname.h>
147 #include <memory.h>
148 #if defined (TIOCGWINSZ)
149 #ifdef NEED_SIOCTL
150 #include <sys/sioctl.h>
151 #endif
152 #ifdef NEED_PTEM_H
153 #include <sys/stream.h>
154 #include <sys/ptem.h>
155 #endif
156 #endif /* TIOCGWINSZ */
157 #endif /* USG */
158
159 extern int quit_char;
160
161 #include "keyboard.h"
162 #include "frame.h"
163 #include "window.h"
164 #include "termhooks.h"
165 #include "termchar.h"
166 #include "termopts.h"
167 #include "dispextern.h"
168 #include "process.h"
169 #include "cm.h" /* for reset_sys_modes */
170
171 #ifdef WINDOWSNT
172 #include <direct.h>
173 /* In process.h which conflicts with the local copy. */
174 #define _P_WAIT 0
175 int _CRTAPI1 _spawnlp (int, const char *, const char *, ...);
176 int _CRTAPI1 _getpid (void);
177 extern char *getwd (char *);
178 #endif
179
180 #ifdef NONSYSTEM_DIR_LIBRARY
181 #include "ndir.h"
182 #endif /* NONSYSTEM_DIR_LIBRARY */
183
184 #include "syssignal.h"
185 #include "systime.h"
186 #ifdef HAVE_UTIME_H
187 #include <utime.h>
188 #endif
189
190 #ifndef HAVE_UTIMES
191 #ifndef HAVE_STRUCT_UTIMBUF
192 /* We want to use utime rather than utimes, but we couldn't find the
193 structure declaration. We'll use the traditional one. */
194 struct utimbuf {
195 long actime;
196 long modtime;
197 };
198 #endif
199 #endif
200
201 /* LPASS8 is new in 4.3, and makes cbreak mode provide all 8 bits. */
202 #ifndef LPASS8
203 #define LPASS8 0
204 #endif
205
206 #ifdef BSD4_1
207 #define LNOFLSH 0100000
208 #endif
209
210 static int baud_convert[] =
211 #ifdef BAUD_CONVERT
212 BAUD_CONVERT;
213 #else
214 {
215 0, 50, 75, 110, 135, 150, 200, 300, 600, 1200,
216 1800, 2400, 4800, 9600, 19200, 38400
217 };
218 #endif
219
220 #ifdef HAVE_SPEED_T
221 #include <termios.h>
222 #else
223 #if defined (HAVE_LIBNCURSES) && ! defined (NCURSES_OSPEED_T)
224 #else
225 #if defined (HAVE_TERMIOS_H) && defined (GNU_LINUX)
226 #include <termios.h>
227 #endif
228 #endif
229 #endif
230
231 int emacs_ospeed;
232
233 void croak P_ ((char *)) NO_RETURN;
234
235 #ifdef AIXHFT
236 void hft_init P_ ((struct tty_display_info *));
237 void hft_reset P_ ((struct tty_display_info *));
238 #endif
239
240 /* Temporary used by `sigblock' when defined in terms of signprocmask. */
241
242 SIGMASKTYPE sigprocmask_set;
243
244
245 #if !defined (HAVE_GET_CURRENT_DIR_NAME) || defined (BROKEN_GET_CURRENT_DIR_NAME)
246
247 /* Return the current working directory. Returns NULL on errors.
248 Any other returned value must be freed with free. This is used
249 only when get_current_dir_name is not defined on the system. */
250 char*
251 get_current_dir_name ()
252 {
253 char *buf;
254 char *pwd;
255 struct stat dotstat, pwdstat;
256 /* If PWD is accurate, use it instead of calling getwd. PWD is
257 sometimes a nicer name, and using it may avoid a fatal error if a
258 parent directory is searchable but not readable. */
259 if ((pwd = getenv ("PWD")) != 0
260 && (IS_DIRECTORY_SEP (*pwd) || (*pwd && IS_DEVICE_SEP (pwd[1])))
261 && stat (pwd, &pwdstat) == 0
262 && stat (".", &dotstat) == 0
263 && dotstat.st_ino == pwdstat.st_ino
264 && dotstat.st_dev == pwdstat.st_dev
265 #ifdef MAXPATHLEN
266 && strlen (pwd) < MAXPATHLEN
267 #endif
268 )
269 {
270 buf = (char *) malloc (strlen (pwd) + 1);
271 if (!buf)
272 return NULL;
273 strcpy (buf, pwd);
274 }
275 #ifdef HAVE_GETCWD
276 else
277 {
278 size_t buf_size = 1024;
279 buf = (char *) malloc (buf_size);
280 if (!buf)
281 return NULL;
282 for (;;)
283 {
284 if (getcwd (buf, buf_size) == buf)
285 break;
286 if (errno != ERANGE)
287 {
288 int tmp_errno = errno;
289 free (buf);
290 errno = tmp_errno;
291 return NULL;
292 }
293 buf_size *= 2;
294 buf = (char *) realloc (buf, buf_size);
295 if (!buf)
296 return NULL;
297 }
298 }
299 #else
300 else
301 {
302 /* We need MAXPATHLEN here. */
303 buf = (char *) malloc (MAXPATHLEN + 1);
304 if (!buf)
305 return NULL;
306 if (getwd (buf) == NULL)
307 {
308 int tmp_errno = errno;
309 free (buf);
310 errno = tmp_errno;
311 return NULL;
312 }
313 }
314 #endif
315 return buf;
316 }
317 #endif
318
319 \f
320 /* Discard pending input on all input descriptors. */
321
322 void
323 discard_tty_input ()
324 {
325 #ifndef WINDOWSNT
326 struct emacs_tty buf;
327
328 if (noninteractive)
329 return;
330
331 #ifdef VMS
332 end_kbd_input ();
333 SYS$QIOW (0, fileno (CURTTY()->input), IO$_READVBLK|IO$M_PURGE, input_iosb, 0, 0,
334 &buf.main, 0, 0, terminator_mask, 0, 0);
335 queue_kbd_input ();
336 #else /* not VMS */
337 #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */
338 while (dos_keyread () != -1)
339 ;
340 #else /* not MSDOS */
341 {
342 struct tty_display_info *tty;
343 for (tty = tty_list; tty; tty = tty->next)
344 {
345 if (tty->input) /* Is the device suspended? */
346 {
347 EMACS_GET_TTY (fileno (tty->input), &buf);
348 EMACS_SET_TTY (fileno (tty->input), &buf, 0);
349 }
350 }
351 }
352 #endif /* not MSDOS */
353 #endif /* not VMS */
354 #endif /* not WINDOWSNT */
355 }
356
357 \f
358 #ifdef SIGTSTP
359
360 /* Arrange for character C to be read as the next input from
361 the terminal.
362 XXX What if we have multiple ttys?
363 */
364
365 void
366 stuff_char (char c)
367 {
368 if (! FRAME_TERMCAP_P (SELECTED_FRAME ()))
369 return;
370
371 /* Should perhaps error if in batch mode */
372 #ifdef TIOCSTI
373 ioctl (fileno (CURTTY()->input), TIOCSTI, &c);
374 #else /* no TIOCSTI */
375 error ("Cannot stuff terminal input characters in this version of Unix");
376 #endif /* no TIOCSTI */
377 }
378
379 #endif /* SIGTSTP */
380 \f
381 void
382 init_baud_rate (int fd)
383 {
384 if (noninteractive)
385 emacs_ospeed = 0;
386 else
387 {
388 #ifdef DOS_NT
389 emacs_ospeed = 15;
390 #else /* not DOS_NT */
391 #ifdef VMS
392 struct sensemode sg;
393
394 SYS$QIOW (0, fd, IO$_SENSEMODE, &sg, 0, 0,
395 &sg.class, 12, 0, 0, 0, 0 );
396 emacs_ospeed = sg.xmit_baud;
397 #else /* not VMS */
398 #ifdef HAVE_TERMIOS
399 struct termios sg;
400
401 sg.c_cflag = B9600;
402 tcgetattr (fd, &sg);
403 emacs_ospeed = cfgetospeed (&sg);
404 #else /* neither VMS nor TERMIOS */
405 #ifdef HAVE_TERMIO
406 struct termio sg;
407
408 sg.c_cflag = B9600;
409 #ifdef HAVE_TCATTR
410 tcgetattr (fd, &sg);
411 #else
412 ioctl (fd, TCGETA, &sg);
413 #endif
414 emacs_ospeed = sg.c_cflag & CBAUD;
415 #else /* neither VMS nor TERMIOS nor TERMIO */
416 struct sgttyb sg;
417
418 sg.sg_ospeed = B9600;
419 if (ioctl (fd, TIOCGETP, &sg) < 0)
420 abort ();
421 emacs_ospeed = sg.sg_ospeed;
422 #endif /* not HAVE_TERMIO */
423 #endif /* not HAVE_TERMIOS */
424 #endif /* not VMS */
425 #endif /* not DOS_NT */
426 }
427
428 baud_rate = (emacs_ospeed < sizeof baud_convert / sizeof baud_convert[0]
429 ? baud_convert[emacs_ospeed] : 9600);
430 if (baud_rate == 0)
431 baud_rate = 1200;
432 }
433
434 \f
435 /*ARGSUSED*/
436 void
437 set_exclusive_use (fd)
438 int fd;
439 {
440 #ifdef FIOCLEX
441 ioctl (fd, FIOCLEX, 0);
442 #endif
443 /* Ok to do nothing if this feature does not exist */
444 }
445 \f
446 #ifndef subprocesses
447
448 wait_without_blocking ()
449 {
450 #ifdef BSD_SYSTEM
451 wait3 (0, WNOHANG | WUNTRACED, 0);
452 #else
453 croak ("wait_without_blocking");
454 #endif
455 synch_process_alive = 0;
456 }
457
458 #endif /* not subprocesses */
459
460 int wait_debugging; /* Set nonzero to make following function work under dbx
461 (at least for bsd). */
462
463 SIGTYPE
464 wait_for_termination_signal ()
465 {}
466
467 /* Wait for subprocess with process id `pid' to terminate and
468 make sure it will get eliminated (not remain forever as a zombie) */
469
470 void
471 wait_for_termination (pid)
472 int pid;
473 {
474 while (1)
475 {
476 #ifdef subprocesses
477 #ifdef VMS
478 int status;
479
480 status = SYS$FORCEX (&pid, 0, 0);
481 break;
482 #else /* not VMS */
483 #if defined (BSD_SYSTEM) || (defined (HPUX) && !defined (HPUX_5))
484 /* Note that kill returns -1 even if the process is just a zombie now.
485 But inevitably a SIGCHLD interrupt should be generated
486 and child_sig will do wait3 and make the process go away. */
487 /* There is some indication that there is a bug involved with
488 termination of subprocesses, perhaps involving a kernel bug too,
489 but no idea what it is. Just as a hunch we signal SIGCHLD to see
490 if that causes the problem to go away or get worse. */
491 sigsetmask (sigmask (SIGCHLD));
492 if (0 > kill (pid, 0))
493 {
494 sigsetmask (SIGEMPTYMASK);
495 kill (getpid (), SIGCHLD);
496 break;
497 }
498 if (wait_debugging)
499 sleep (1);
500 else
501 sigpause (SIGEMPTYMASK);
502 #else /* not BSD_SYSTEM, and not HPUX version >= 6 */
503 #ifdef POSIX_SIGNALS /* would this work for GNU/Linux as well? */
504 sigblock (sigmask (SIGCHLD));
505 errno = 0;
506 if (kill (pid, 0) == -1 && errno == ESRCH)
507 {
508 sigunblock (sigmask (SIGCHLD));
509 break;
510 }
511
512 sigsuspend (&empty_mask);
513 #else /* not POSIX_SIGNALS */
514 #ifdef HAVE_SYSV_SIGPAUSE
515 sighold (SIGCHLD);
516 if (0 > kill (pid, 0))
517 {
518 sigrelse (SIGCHLD);
519 break;
520 }
521 sigpause (SIGCHLD);
522 #else /* not HAVE_SYSV_SIGPAUSE */
523 #ifdef WINDOWSNT
524 wait (0);
525 break;
526 #else /* not WINDOWSNT */
527 if (0 > kill (pid, 0))
528 break;
529 /* Using sleep instead of pause avoids timing error.
530 If the inferior dies just before the sleep,
531 we lose just one second. */
532 sleep (1);
533 #endif /* not WINDOWSNT */
534 #endif /* not HAVE_SYSV_SIGPAUSE */
535 #endif /* not POSIX_SIGNALS */
536 #endif /* not BSD_SYSTEM, and not HPUX version >= 6 */
537 #endif /* not VMS */
538 #else /* not subprocesses */
539 #if __DJGPP__ > 1
540 break;
541 #else /* not __DJGPP__ > 1 */
542 #ifndef BSD4_1
543 if (kill (pid, 0) < 0)
544 break;
545 wait (0);
546 #else /* BSD4_1 */
547 int status;
548 status = wait (0);
549 if (status == pid || status == -1)
550 break;
551 #endif /* BSD4_1 */
552 #endif /* not __DJGPP__ > 1*/
553 #endif /* not subprocesses */
554 }
555 }
556
557 #ifdef subprocesses
558
559 /*
560 * flush any pending output
561 * (may flush input as well; it does not matter the way we use it)
562 */
563
564 void
565 flush_pending_output (channel)
566 int channel;
567 {
568 #ifdef HAVE_TERMIOS
569 /* If we try this, we get hit with SIGTTIN, because
570 the child's tty belongs to the child's pgrp. */
571 #else
572 #ifdef TCFLSH
573 ioctl (channel, TCFLSH, 1);
574 #else
575 #ifdef TIOCFLUSH
576 int zero = 0;
577 /* 3rd arg should be ignored
578 but some 4.2 kernels actually want the address of an int
579 and nonzero means something different. */
580 ioctl (channel, TIOCFLUSH, &zero);
581 #endif
582 #endif
583 #endif
584 }
585 \f
586 #ifndef VMS
587 /* Set up the terminal at the other end of a pseudo-terminal that
588 we will be controlling an inferior through.
589 It should not echo or do line-editing, since that is done
590 in Emacs. No padding needed for insertion into an Emacs buffer. */
591
592 void
593 child_setup_tty (out)
594 int out;
595 {
596 #ifndef DOS_NT
597 struct emacs_tty s;
598
599 EMACS_GET_TTY (out, &s);
600
601 #if defined (HAVE_TERMIO) || defined (HAVE_TERMIOS)
602 s.main.c_oflag |= OPOST; /* Enable output postprocessing */
603 s.main.c_oflag &= ~ONLCR; /* Disable map of NL to CR-NL on output */
604 #ifdef NLDLY
605 s.main.c_oflag &= ~(NLDLY|CRDLY|TABDLY|BSDLY|VTDLY|FFDLY);
606 /* No output delays */
607 #endif
608 s.main.c_lflag &= ~ECHO; /* Disable echo */
609 s.main.c_lflag |= ISIG; /* Enable signals */
610 #if 0 /* This causes bugs in (for instance) telnet to certain sites. */
611 s.main.c_iflag &= ~ICRNL; /* Disable map of CR to NL on input */
612 #ifdef INLCR /* Just being cautious, since I can't check how
613 widespread INLCR is--rms. */
614 s.main.c_iflag &= ~INLCR; /* Disable map of NL to CR on input */
615 #endif
616 #endif
617 #ifdef IUCLC
618 s.main.c_iflag &= ~IUCLC; /* Disable downcasing on input. */
619 #endif
620 #ifdef ISTRIP
621 s.main.c_iflag &= ~ISTRIP; /* don't strip 8th bit on input */
622 #endif
623 #ifdef OLCUC
624 s.main.c_oflag &= ~OLCUC; /* Disable upcasing on output. */
625 #endif
626 s.main.c_oflag &= ~TAB3; /* Disable tab expansion */
627 s.main.c_cflag = (s.main.c_cflag & ~CSIZE) | CS8; /* Don't strip 8th bit */
628 #if 0
629 /* Said to be unnecessary: */
630 s.main.c_cc[VMIN] = 1; /* minimum number of characters to accept */
631 s.main.c_cc[VTIME] = 0; /* wait forever for at least 1 character */
632 #endif
633
634 s.main.c_lflag |= ICANON; /* Enable erase/kill and eof processing */
635 s.main.c_cc[VEOF] = 04; /* insure that EOF is Control-D */
636 s.main.c_cc[VERASE] = CDISABLE; /* disable erase processing */
637 s.main.c_cc[VKILL] = CDISABLE; /* disable kill processing */
638
639 #ifdef HPUX
640 s.main.c_cflag = (s.main.c_cflag & ~CBAUD) | B9600; /* baud rate sanity */
641 #endif /* HPUX */
642
643 #ifdef SIGNALS_VIA_CHARACTERS
644 /* the QUIT and INTR character are used in process_send_signal
645 so set them here to something useful. */
646 if (s.main.c_cc[VQUIT] == CDISABLE)
647 s.main.c_cc[VQUIT] = '\\'&037; /* Control-\ */
648 if (s.main.c_cc[VINTR] == CDISABLE)
649 s.main.c_cc[VINTR] = 'C'&037; /* Control-C */
650 #endif /* not SIGNALS_VIA_CHARACTERS */
651
652 #ifdef AIX
653 /* AIX enhanced edit loses NULs, so disable it */
654 #ifndef IBMR2AIX
655 s.main.c_line = 0;
656 s.main.c_iflag &= ~ASCEDIT;
657 #endif
658 /* Also, PTY overloads NUL and BREAK.
659 don't ignore break, but don't signal either, so it looks like NUL. */
660 s.main.c_iflag &= ~IGNBRK;
661 s.main.c_iflag &= ~BRKINT;
662 /* rms: Formerly it set s.main.c_cc[VINTR] to 0377 here
663 unconditionally. Then a SIGNALS_VIA_CHARACTERS conditional
664 would force it to 0377. That looks like duplicated code. */
665 #ifndef SIGNALS_VIA_CHARACTERS
666 /* QUIT and INTR work better as signals, so disable character forms */
667 s.main.c_cc[VQUIT] = CDISABLE;
668 s.main.c_cc[VINTR] = CDISABLE;
669 s.main.c_lflag &= ~ISIG;
670 #endif /* no TIOCGPGRP or no TIOCGLTC or no TIOCGETC */
671 s.main.c_cc[VEOL] = CDISABLE;
672 s.main.c_cflag = (s.main.c_cflag & ~CBAUD) | B9600; /* baud rate sanity */
673 #endif /* AIX */
674
675 #else /* not HAVE_TERMIO */
676
677 s.main.sg_flags &= ~(ECHO | CRMOD | ANYP | ALLDELAY | RAW | LCASE
678 | CBREAK | TANDEM);
679 s.main.sg_flags |= LPASS8;
680 s.main.sg_erase = 0377;
681 s.main.sg_kill = 0377;
682 s.lmode = LLITOUT | s.lmode; /* Don't strip 8th bit */
683
684 #endif /* not HAVE_TERMIO */
685
686 EMACS_SET_TTY (out, &s, 0);
687
688 #ifdef BSD4_1
689 if (interrupt_input)
690 reset_sigio (0);
691 #endif /* BSD4_1 */
692 #endif /* not DOS_NT */
693 }
694 #endif /* not VMS */
695
696 #endif /* subprocesses */
697 \f
698 /* Record a signal code and the handler for it. */
699 struct save_signal
700 {
701 int code;
702 SIGTYPE (*handler) P_ ((int));
703 };
704
705 static void save_signal_handlers P_ ((struct save_signal *));
706 static void restore_signal_handlers P_ ((struct save_signal *));
707
708 /* Suspend the Emacs process; give terminal to its superior. */
709
710 void
711 sys_suspend ()
712 {
713 #ifdef VMS
714 /* "Foster" parentage allows emacs to return to a subprocess that attached
715 to the current emacs as a cheaper than starting a whole new process. This
716 is set up by KEPTEDITOR.COM. */
717 unsigned long parent_id, foster_parent_id;
718 char *fpid_string;
719
720 fpid_string = getenv ("EMACS_PARENT_PID");
721 if (fpid_string != NULL)
722 {
723 sscanf (fpid_string, "%x", &foster_parent_id);
724 if (foster_parent_id != 0)
725 parent_id = foster_parent_id;
726 else
727 parent_id = getppid ();
728 }
729 else
730 parent_id = getppid ();
731
732 xfree (fpid_string); /* On VMS, this was malloc'd */
733
734 if (parent_id && parent_id != 0xffffffff)
735 {
736 SIGTYPE (*oldsig)() = (int) signal (SIGINT, SIG_IGN);
737 int status = LIB$ATTACH (&parent_id) & 1;
738 signal (SIGINT, oldsig);
739 return status;
740 }
741 else
742 {
743 struct {
744 int l;
745 char *a;
746 } d_prompt;
747 d_prompt.l = sizeof ("Emacs: "); /* Our special prompt */
748 d_prompt.a = "Emacs: "; /* Just a reminder */
749 LIB$SPAWN (0, 0, 0, 0, 0, 0, 0, 0, 0, 0, &d_prompt, 0);
750 return 1;
751 }
752 return -1;
753 #else
754 #if defined (SIGTSTP) && !defined (MSDOS)
755
756 {
757 int pgrp = EMACS_GETPGRP (0);
758 EMACS_KILLPG (pgrp, SIGTSTP);
759 }
760
761 #else /* No SIGTSTP */
762 #ifdef USG_JOBCTRL /* If you don't know what this is don't mess with it */
763 ptrace (0, 0, 0, 0); /* set for ptrace - caught by csh */
764 kill (getpid (), SIGQUIT);
765
766 #else /* No SIGTSTP or USG_JOBCTRL */
767
768 /* On a system where suspending is not implemented,
769 instead fork a subshell and let it talk directly to the terminal
770 while we wait. */
771 sys_subshell ();
772
773 #endif /* no USG_JOBCTRL */
774 #endif /* no SIGTSTP */
775 #endif /* not VMS */
776 }
777
778 /* Fork a subshell. */
779
780 void
781 sys_subshell ()
782 {
783 #ifndef VMS
784 #ifdef DOS_NT /* Demacs 1.1.2 91/10/20 Manabu Higashida */
785 int st;
786 char oldwd[MAXPATHLEN+1]; /* Fixed length is safe on MSDOS. */
787 #endif
788 int pid;
789 struct save_signal saved_handlers[5];
790 Lisp_Object dir;
791 unsigned char *str = 0;
792 int len;
793
794 saved_handlers[0].code = SIGINT;
795 saved_handlers[1].code = SIGQUIT;
796 saved_handlers[2].code = SIGTERM;
797 #ifdef SIGIO
798 saved_handlers[3].code = SIGIO;
799 saved_handlers[4].code = 0;
800 #else
801 saved_handlers[3].code = 0;
802 #endif
803
804 /* Mentioning current_buffer->buffer would mean including buffer.h,
805 which somehow wedges the hp compiler. So instead... */
806
807 dir = intern ("default-directory");
808 if (NILP (Fboundp (dir)))
809 goto xyzzy;
810 dir = Fsymbol_value (dir);
811 if (!STRINGP (dir))
812 goto xyzzy;
813
814 dir = expand_and_dir_to_file (Funhandled_file_name_directory (dir), Qnil);
815 str = (unsigned char *) alloca (SCHARS (dir) + 2);
816 len = SCHARS (dir);
817 bcopy (SDATA (dir), str, len);
818 if (str[len - 1] != '/') str[len++] = '/';
819 str[len] = 0;
820 xyzzy:
821
822 #ifdef DOS_NT
823 pid = 0;
824 #if __DJGPP__ > 1
825 save_signal_handlers (saved_handlers);
826 synch_process_alive = 1;
827 #endif /* __DJGPP__ > 1 */
828 #else
829 pid = vfork ();
830 if (pid == -1)
831 error ("Can't spawn subshell");
832 #endif
833
834 if (pid == 0)
835 {
836 char *sh = 0;
837
838 #ifdef DOS_NT /* MW, Aug 1993 */
839 getwd (oldwd);
840 if (sh == 0)
841 sh = (char *) egetenv ("SUSPEND"); /* KFS, 1994-12-14 */
842 #endif
843 if (sh == 0)
844 sh = (char *) egetenv ("SHELL");
845 if (sh == 0)
846 sh = "sh";
847
848 /* Use our buffer's default directory for the subshell. */
849 if (str)
850 chdir ((char *) str);
851
852 #ifdef subprocesses
853 close_process_descs (); /* Close Emacs's pipes/ptys */
854 #endif
855
856 #ifdef SET_EMACS_PRIORITY
857 {
858 extern EMACS_INT emacs_priority;
859
860 if (emacs_priority < 0)
861 nice (-emacs_priority);
862 }
863 #endif
864
865 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */
866 {
867 char *epwd = getenv ("PWD");
868 char old_pwd[MAXPATHLEN+1+4];
869
870 /* If PWD is set, pass it with corrected value. */
871 if (epwd)
872 {
873 strcpy (old_pwd, epwd);
874 if (str[len - 1] == '/')
875 str[len - 1] = '\0';
876 setenv ("PWD", str, 1);
877 }
878 st = system (sh);
879 chdir (oldwd);
880 if (epwd)
881 putenv (old_pwd); /* restore previous value */
882 }
883 #if 0 /* This is also reported if last command executed in subshell failed, KFS */
884 if (st)
885 report_file_error ("Can't execute subshell", Fcons (build_string (sh), Qnil));
886 #endif
887 #else /* not MSDOS */
888 #ifdef WINDOWSNT
889 /* Waits for process completion */
890 pid = _spawnlp (_P_WAIT, sh, sh, NULL);
891 chdir (oldwd);
892 if (pid == -1)
893 write (1, "Can't execute subshell", 22);
894 #else /* not WINDOWSNT */
895 execlp (sh, sh, (char *) 0);
896 write (1, "Can't execute subshell", 22);
897 _exit (1);
898 #endif /* not WINDOWSNT */
899 #endif /* not MSDOS */
900 }
901
902 /* Do this now if we did not do it before. */
903 #if !defined (MSDOS) || __DJGPP__ == 1
904 save_signal_handlers (saved_handlers);
905 synch_process_alive = 1;
906 #endif
907
908 #ifndef DOS_NT
909 wait_for_termination (pid);
910 #endif
911 restore_signal_handlers (saved_handlers);
912 synch_process_alive = 0;
913 #endif /* !VMS */
914 }
915
916 static void
917 save_signal_handlers (saved_handlers)
918 struct save_signal *saved_handlers;
919 {
920 while (saved_handlers->code)
921 {
922 saved_handlers->handler
923 = (SIGTYPE (*) P_ ((int))) signal (saved_handlers->code, SIG_IGN);
924 saved_handlers++;
925 }
926 }
927
928 static void
929 restore_signal_handlers (saved_handlers)
930 struct save_signal *saved_handlers;
931 {
932 while (saved_handlers->code)
933 {
934 signal (saved_handlers->code, saved_handlers->handler);
935 saved_handlers++;
936 }
937 }
938 \f
939 #ifndef SIGIO
940 /* If SIGIO is broken, don't do anything. */
941 void
942 init_sigio (int fd)
943 {
944 }
945
946 void
947 reset_sigio (int fd)
948 {
949 }
950
951 void
952 request_sigio (void)
953 {
954 }
955
956 void
957 unrequest_sigio (void)
958 {
959 }
960
961 #else
962 #ifdef F_SETFL
963
964 int old_fcntl_flags[MAXDESC];
965
966 void
967 init_sigio (fd)
968 int fd;
969 {
970 #ifdef FASYNC
971 old_fcntl_flags[fd] = fcntl (fd, F_GETFL, 0) & ~FASYNC;
972 fcntl (fd, F_SETFL, old_fcntl_flags[fd] | FASYNC);
973 #endif
974 interrupts_deferred = 0;
975 }
976
977 void
978 reset_sigio (fd)
979 int fd;
980 {
981 #ifdef FASYNC
982 fcntl (fd, F_SETFL, old_fcntl_flags[fd]);
983 #endif
984 }
985
986 #ifdef FASYNC /* F_SETFL does not imply existence of FASYNC */
987 /* XXX Uhm, FASYNC is not used anymore here. */
988 /* XXX Yeah, but you need it for SIGIO, don't you? */
989
990 void
991 request_sigio ()
992 {
993 if (noninteractive)
994 return;
995
996 #ifdef SIGWINCH
997 sigunblock (sigmask (SIGWINCH));
998 #endif
999 sigunblock (sigmask (SIGIO));
1000
1001 interrupts_deferred = 0;
1002 }
1003
1004 void
1005 unrequest_sigio (void)
1006 {
1007 if (noninteractive)
1008 return;
1009
1010 #if 0 /* XXX What's wrong with blocking SIGIO under X? */
1011 if (x_display_list)
1012 return;
1013 #endif
1014
1015 #ifdef SIGWINCH
1016 sigblock (sigmask (SIGWINCH));
1017 #endif
1018 sigblock (sigmask (SIGIO));
1019 interrupts_deferred = 1;
1020 }
1021
1022 #else /* no FASYNC */
1023 #ifndef MSDOS
1024
1025 void
1026 request_sigio ()
1027 {
1028 if (noninteractive || read_socket_hook)
1029 return;
1030
1031 croak ("request_sigio");
1032 }
1033
1034 void
1035 unrequest_sigio ()
1036 {
1037 if (noninteractive || read_socket_hook)
1038 return;
1039
1040 croak ("unrequest_sigio");
1041 }
1042
1043 #endif /* MSDOS */
1044 #endif /* FASYNC */
1045 #endif /* F_SETFL */
1046 #endif /* SIGIO */
1047 \f
1048 /* Saving and restoring the process group of Emacs's terminal. */
1049
1050 #ifdef BSD_PGRPS
1051
1052 /* The process group of which Emacs was a member when it initially
1053 started.
1054
1055 If Emacs was in its own process group (i.e. inherited_pgroup ==
1056 getpid ()), then we know we're running under a shell with job
1057 control (Emacs would never be run as part of a pipeline).
1058 Everything is fine.
1059
1060 If Emacs was not in its own process group, then we know we're
1061 running under a shell (or a caller) that doesn't know how to
1062 separate itself from Emacs (like sh). Emacs must be in its own
1063 process group in order to receive SIGIO correctly. In this
1064 situation, we put ourselves in our own pgroup, forcibly set the
1065 tty's pgroup to our pgroup, and make sure to restore and reinstate
1066 the tty's pgroup just like any other terminal setting. If
1067 inherited_group was not the tty's pgroup, then we'll get a
1068 SIGTTmumble when we try to change the tty's pgroup, and a CONT if
1069 it goes foreground in the future, which is what should happen.
1070
1071 This variable is initialized in emacs.c. */
1072 int inherited_pgroup;
1073
1074 /* Split off the foreground process group to Emacs alone. When we are
1075 in the foreground, but not started in our own process group,
1076 redirect the tty device handle FD to point to our own process
1077 group. We need to be in our own process group to receive SIGIO
1078 properly. */
1079 static void
1080 narrow_foreground_group (int fd)
1081 {
1082 int me = getpid ();
1083
1084 setpgrp (0, inherited_pgroup);
1085 #if 0
1086 /* XXX inherited_pgroup should not be zero here, but GTK seems to
1087 mess this up. */
1088 if (! inherited_pgroup)
1089 abort (); /* Should not happen. */
1090 #endif
1091 if (inherited_pgroup != me)
1092 EMACS_SET_TTY_PGRP (fd, &me); /* XXX This only works on the controlling tty. */
1093 setpgrp (0, me);
1094 }
1095
1096 /* Set the tty to our original foreground group. */
1097 static void
1098 widen_foreground_group (int fd)
1099 {
1100 if (inherited_pgroup != getpid ())
1101 EMACS_SET_TTY_PGRP (fd, &inherited_pgroup);
1102 setpgrp (0, inherited_pgroup);
1103 }
1104
1105 #endif /* BSD_PGRPS */
1106 \f
1107 /* Getting and setting emacs_tty structures. */
1108
1109 /* Set *TC to the parameters associated with the terminal FD.
1110 Return zero if all's well, or -1 if we ran into an error we
1111 couldn't deal with. */
1112 int
1113 emacs_get_tty (fd, settings)
1114 int fd;
1115 struct emacs_tty *settings;
1116 {
1117 /* Retrieve the primary parameters - baud rate, character size, etcetera. */
1118 #ifdef HAVE_TCATTR
1119 /* We have those nifty POSIX tcmumbleattr functions. */
1120 bzero (&settings->main, sizeof (settings->main));
1121 if (tcgetattr (fd, &settings->main) < 0)
1122 return -1;
1123
1124 #else
1125 #ifdef HAVE_TERMIO
1126 /* The SYSV-style interface? */
1127 if (ioctl (fd, TCGETA, &settings->main) < 0)
1128 return -1;
1129
1130 #else
1131 #ifdef VMS
1132 /* Vehemently Monstrous System? :-) */
1133 if (! (SYS$QIOW (0, fd, IO$_SENSEMODE, settings, 0, 0,
1134 &settings->main.class, 12, 0, 0, 0, 0)
1135 & 1))
1136 return -1;
1137
1138 #else
1139 #ifndef DOS_NT
1140 /* I give up - I hope you have the BSD ioctls. */
1141 if (ioctl (fd, TIOCGETP, &settings->main) < 0)
1142 return -1;
1143 #endif /* not DOS_NT */
1144 #endif
1145 #endif
1146 #endif
1147
1148 /* Suivant - Do we have to get struct ltchars data? */
1149 #ifdef HAVE_LTCHARS
1150 if (ioctl (fd, TIOCGLTC, &settings->ltchars) < 0)
1151 return -1;
1152 #endif
1153
1154 /* How about a struct tchars and a wordful of lmode bits? */
1155 #ifdef HAVE_TCHARS
1156 if (ioctl (fd, TIOCGETC, &settings->tchars) < 0
1157 || ioctl (fd, TIOCLGET, &settings->lmode) < 0)
1158 return -1;
1159 #endif
1160
1161 /* We have survived the tempest. */
1162 return 0;
1163 }
1164
1165
1166 /* Set the parameters of the tty on FD according to the contents of
1167 *SETTINGS. If FLUSHP is non-zero, we discard input.
1168 Return 0 if all went well, and -1 if anything failed. */
1169
1170 int
1171 emacs_set_tty (fd, settings, flushp)
1172 int fd;
1173 struct emacs_tty *settings;
1174 int flushp;
1175 {
1176 /* Set the primary parameters - baud rate, character size, etcetera. */
1177 #ifdef HAVE_TCATTR
1178 int i;
1179 /* We have those nifty POSIX tcmumbleattr functions.
1180 William J. Smith <wjs@wiis.wang.com> writes:
1181 "POSIX 1003.1 defines tcsetattr to return success if it was
1182 able to perform any of the requested actions, even if some
1183 of the requested actions could not be performed.
1184 We must read settings back to ensure tty setup properly.
1185 AIX requires this to keep tty from hanging occasionally." */
1186 /* This make sure that we don't loop indefinitely in here. */
1187 for (i = 0 ; i < 10 ; i++)
1188 if (tcsetattr (fd, flushp ? TCSAFLUSH : TCSADRAIN, &settings->main) < 0)
1189 {
1190 if (errno == EINTR)
1191 continue;
1192 else
1193 return -1;
1194 }
1195 else
1196 {
1197 struct termios new;
1198
1199 bzero (&new, sizeof (new));
1200 /* Get the current settings, and see if they're what we asked for. */
1201 tcgetattr (fd, &new);
1202 /* We cannot use memcmp on the whole structure here because under
1203 * aix386 the termios structure has some reserved field that may
1204 * not be filled in.
1205 */
1206 if ( new.c_iflag == settings->main.c_iflag
1207 && new.c_oflag == settings->main.c_oflag
1208 && new.c_cflag == settings->main.c_cflag
1209 && new.c_lflag == settings->main.c_lflag
1210 && memcmp (new.c_cc, settings->main.c_cc, NCCS) == 0)
1211 break;
1212 else
1213 continue;
1214 }
1215
1216 #else
1217 #ifdef HAVE_TERMIO
1218 /* The SYSV-style interface? */
1219 if (ioctl (fd, flushp ? TCSETAF : TCSETAW, &settings->main) < 0)
1220 return -1;
1221
1222 #else
1223 #ifdef VMS
1224 /* Vehemently Monstrous System? :-) */
1225 if (! (SYS$QIOW (0, fd, IO$_SETMODE, &input_iosb, 0, 0,
1226 &settings->main.class, 12, 0, 0, 0, 0)
1227 & 1))
1228 return -1;
1229
1230 #else
1231 #ifndef DOS_NT
1232 /* I give up - I hope you have the BSD ioctls. */
1233 if (ioctl (fd, (flushp) ? TIOCSETP : TIOCSETN, &settings->main) < 0)
1234 return -1;
1235 #endif /* not DOS_NT */
1236
1237 #endif
1238 #endif
1239 #endif
1240
1241 /* Suivant - Do we have to get struct ltchars data? */
1242 #ifdef HAVE_LTCHARS
1243 if (ioctl (fd, TIOCSLTC, &settings->ltchars) < 0)
1244 return -1;
1245 #endif
1246
1247 /* How about a struct tchars and a wordful of lmode bits? */
1248 #ifdef HAVE_TCHARS
1249 if (ioctl (fd, TIOCSETC, &settings->tchars) < 0
1250 || ioctl (fd, TIOCLSET, &settings->lmode) < 0)
1251 return -1;
1252 #endif
1253
1254 /* We have survived the tempest. */
1255 return 0;
1256 }
1257
1258 \f
1259
1260 #ifdef BSD4_1
1261 /* BSD 4.1 needs to keep track of the lmode bits in order to start
1262 sigio. */
1263 int lmode;
1264 #endif
1265
1266 #ifdef F_SETOWN
1267 int old_fcntl_owner[MAXDESC];
1268 #endif /* F_SETOWN */
1269
1270 /* This may also be defined in stdio,
1271 but if so, this does no harm,
1272 and using the same name avoids wasting the other one's space. */
1273
1274 #ifdef nec_ews_svr4
1275 extern char *_sobuf ;
1276 #else
1277 #if defined (USG) || defined (DGUX)
1278 unsigned char _sobuf[BUFSIZ+8];
1279 #else
1280 char _sobuf[BUFSIZ];
1281 #endif
1282 #endif
1283
1284 #ifdef HAVE_LTCHARS
1285 static struct ltchars new_ltchars = {-1,-1,-1,-1,-1,-1};
1286 #endif
1287 #ifdef HAVE_TCHARS
1288 static struct tchars new_tchars = {-1,-1,-1,-1,-1,-1};
1289 #endif
1290
1291 /* Initialize the terminal mode on all tty devices that are currently
1292 open. */
1293
1294 void
1295 init_all_sys_modes (void)
1296 {
1297 struct tty_display_info *tty;
1298 for (tty = tty_list; tty; tty = tty->next)
1299 init_sys_modes (tty);
1300 }
1301
1302 /* Initialize the terminal mode on the given tty device. */
1303
1304 void
1305 init_sys_modes (tty_out)
1306 struct tty_display_info *tty_out;
1307 {
1308 struct emacs_tty tty;
1309
1310 #ifdef VMS
1311 #if 0
1312 static int oob_chars[2] = {0, 1 << 7}; /* catch C-g's */
1313 extern int (*interrupt_signal) ();
1314 #endif
1315 #endif
1316
1317 Vtty_erase_char = Qnil;
1318
1319 if (noninteractive)
1320 return;
1321
1322 if (!tty_out->output)
1323 return; /* The tty is suspended. */
1324
1325 #ifdef VMS
1326 if (!input_ef)
1327 input_ef = get_kbd_event_flag ();
1328 /* LIB$GET_EF (&input_ef); */
1329 SYS$CLREF (input_ef);
1330 waiting_for_ast = 0;
1331 if (!timer_ef)
1332 timer_ef = get_timer_event_flag ();
1333 /* LIB$GET_EF (&timer_ef); */
1334 SYS$CLREF (timer_ef);
1335 #if 0
1336 if (!process_ef)
1337 {
1338 LIB$GET_EF (&process_ef);
1339 SYS$CLREF (process_ef);
1340 }
1341 if (input_ef / 32 != process_ef / 32)
1342 croak ("Input and process event flags in different clusters.");
1343 #endif
1344 if (input_ef / 32 != timer_ef / 32)
1345 croak ("Input and timer event flags in different clusters.");
1346 #if 0
1347 input_eflist = ((unsigned) 1 << (input_ef % 32)) |
1348 ((unsigned) 1 << (process_ef % 32));
1349 #endif
1350 timer_eflist = ((unsigned) 1 << (input_ef % 32)) |
1351 ((unsigned) 1 << (timer_ef % 32));
1352 #ifndef VMS4_4
1353 sys_access_reinit ();
1354 #endif
1355 #endif /* VMS */
1356
1357 #ifdef BSD_PGRPS
1358 #if 0
1359 /* read_socket_hook is not global anymore. I think doing this
1360 unconditionally will not cause any problems. */
1361 if (! read_socket_hook && EQ (Vinitial_window_system, Qnil))
1362 #endif
1363 narrow_foreground_group (fileno (tty_out->input));
1364 #endif
1365
1366 if (! tty_out->old_tty)
1367 tty_out->old_tty = (struct emacs_tty *) xmalloc (sizeof (struct emacs_tty));
1368
1369 EMACS_GET_TTY (fileno (tty_out->input), tty_out->old_tty);
1370
1371 tty = *tty_out->old_tty;
1372
1373 #if defined (HAVE_TERMIO) || defined (HAVE_TERMIOS)
1374 XSETINT (Vtty_erase_char, tty.main.c_cc[VERASE]);
1375
1376 tty.main.c_iflag |= (IGNBRK); /* Ignore break condition */
1377 tty.main.c_iflag &= ~ICRNL; /* Disable map of CR to NL on input */
1378 #ifdef INLCR /* I'm just being cautious,
1379 since I can't check how widespread INLCR is--rms. */
1380 tty.main.c_iflag &= ~INLCR; /* Disable map of NL to CR on input */
1381 #endif
1382 #ifdef ISTRIP
1383 tty.main.c_iflag &= ~ISTRIP; /* don't strip 8th bit on input */
1384 #endif
1385 tty.main.c_lflag &= ~ECHO; /* Disable echo */
1386 tty.main.c_lflag &= ~ICANON; /* Disable erase/kill processing */
1387 #ifdef IEXTEN
1388 tty.main.c_lflag &= ~IEXTEN; /* Disable other editing characters. */
1389 #endif
1390 tty.main.c_lflag |= ISIG; /* Enable signals */
1391 if (tty_out->flow_control)
1392 {
1393 tty.main.c_iflag |= IXON; /* Enable start/stop output control */
1394 #ifdef IXANY
1395 tty.main.c_iflag &= ~IXANY;
1396 #endif /* IXANY */
1397 }
1398 else
1399 tty.main.c_iflag &= ~IXON; /* Disable start/stop output control */
1400 tty.main.c_oflag &= ~ONLCR; /* Disable map of NL to CR-NL
1401 on output */
1402 tty.main.c_oflag &= ~TAB3; /* Disable tab expansion */
1403 #ifdef CS8
1404 if (tty_out->meta_key)
1405 {
1406 tty.main.c_cflag |= CS8; /* allow 8th bit on input */
1407 tty.main.c_cflag &= ~PARENB;/* Don't check parity */
1408 }
1409 #endif
1410 if (tty_out->input == stdin)
1411 {
1412 tty.main.c_cc[VINTR] = quit_char; /* C-g (usually) gives SIGINT */
1413 /* Set up C-g for both SIGQUIT and SIGINT.
1414 We don't know which we will get, but we handle both alike
1415 so which one it really gives us does not matter. */
1416 tty.main.c_cc[VQUIT] = quit_char;
1417 }
1418 else
1419 {
1420 /* We normally don't get interrupt or quit signals from tty
1421 devices other than our controlling terminal; therefore,
1422 we must handle C-g as normal input. Unfortunately, this
1423 means that the interrupt and quit feature must be
1424 disabled on secondary ttys, or we would not even see the
1425 keypress.
1426
1427 Note that even though emacsclient could have special code
1428 to pass SIGINT to Emacs, we should _not_ enable
1429 interrupt/quit keys for emacsclient frames. This means
1430 that we can't break out of loops in C code from a
1431 secondary tty frame, but we can always decide what
1432 display the C-g came from, which is more important from a
1433 usability point of view. (Consider the case when two
1434 people work together using the same Emacs instance.) */
1435 tty.main.c_cc[VINTR] = CDISABLE;
1436 tty.main.c_cc[VQUIT] = CDISABLE;
1437 }
1438 tty.main.c_cc[VMIN] = 1; /* Input should wait for at least 1 char */
1439 tty.main.c_cc[VTIME] = 0; /* no matter how long that takes. */
1440 #ifdef VSWTCH
1441 tty.main.c_cc[VSWTCH] = CDISABLE; /* Turn off shell layering use
1442 of C-z */
1443 #endif /* VSWTCH */
1444
1445 #if defined (mips) || defined (HAVE_TCATTR)
1446 #ifdef VSUSP
1447 tty.main.c_cc[VSUSP] = CDISABLE; /* Turn off mips handling of C-z. */
1448 #endif /* VSUSP */
1449 #ifdef V_DSUSP
1450 tty.main.c_cc[V_DSUSP] = CDISABLE; /* Turn off mips handling of C-y. */
1451 #endif /* V_DSUSP */
1452 #ifdef VDSUSP /* Some systems have VDSUSP, some have V_DSUSP. */
1453 tty.main.c_cc[VDSUSP] = CDISABLE;
1454 #endif /* VDSUSP */
1455 #ifdef VLNEXT
1456 tty.main.c_cc[VLNEXT] = CDISABLE;
1457 #endif /* VLNEXT */
1458 #ifdef VREPRINT
1459 tty.main.c_cc[VREPRINT] = CDISABLE;
1460 #endif /* VREPRINT */
1461 #ifdef VWERASE
1462 tty.main.c_cc[VWERASE] = CDISABLE;
1463 #endif /* VWERASE */
1464 #ifdef VDISCARD
1465 tty.main.c_cc[VDISCARD] = CDISABLE;
1466 #endif /* VDISCARD */
1467
1468 if (tty_out->flow_control)
1469 {
1470 #ifdef VSTART
1471 tty.main.c_cc[VSTART] = '\021';
1472 #endif /* VSTART */
1473 #ifdef VSTOP
1474 tty.main.c_cc[VSTOP] = '\023';
1475 #endif /* VSTOP */
1476 }
1477 else
1478 {
1479 #ifdef VSTART
1480 tty.main.c_cc[VSTART] = CDISABLE;
1481 #endif /* VSTART */
1482 #ifdef VSTOP
1483 tty.main.c_cc[VSTOP] = CDISABLE;
1484 #endif /* VSTOP */
1485 }
1486 #endif /* mips or HAVE_TCATTR */
1487
1488 #ifdef SET_LINE_DISCIPLINE
1489 /* Need to explicitly request TERMIODISC line discipline or
1490 Ultrix's termios does not work correctly. */
1491 tty.main.c_line = SET_LINE_DISCIPLINE;
1492 #endif
1493 #ifdef AIX
1494 #ifndef IBMR2AIX
1495 /* AIX enhanced edit loses NULs, so disable it. */
1496 tty.main.c_line = 0;
1497 tty.main.c_iflag &= ~ASCEDIT;
1498 #else
1499 tty.main.c_cc[VSTRT] = CDISABLE;
1500 tty.main.c_cc[VSTOP] = CDISABLE;
1501 tty.main.c_cc[VSUSP] = CDISABLE;
1502 tty.main.c_cc[VDSUSP] = CDISABLE;
1503 #endif /* IBMR2AIX */
1504 if (tty_out->flow_control)
1505 {
1506 #ifdef VSTART
1507 tty.main.c_cc[VSTART] = '\021';
1508 #endif /* VSTART */
1509 #ifdef VSTOP
1510 tty.main.c_cc[VSTOP] = '\023';
1511 #endif /* VSTOP */
1512 }
1513 /* Also, PTY overloads NUL and BREAK.
1514 don't ignore break, but don't signal either, so it looks like NUL.
1515 This really serves a purpose only if running in an XTERM window
1516 or via TELNET or the like, but does no harm elsewhere. */
1517 tty.main.c_iflag &= ~IGNBRK;
1518 tty.main.c_iflag &= ~BRKINT;
1519 #endif
1520 #else /* if not HAVE_TERMIO */
1521 #ifdef VMS
1522 tty.main.tt_char |= TT$M_NOECHO;
1523 if (meta_key)
1524 tty.main.tt_char |= TT$M_EIGHTBIT;
1525 if (tty_out->flow_control)
1526 tty.main.tt_char |= TT$M_TTSYNC;
1527 else
1528 tty.main.tt_char &= ~TT$M_TTSYNC;
1529 tty.main.tt2_char |= TT2$M_PASTHRU | TT2$M_XON;
1530 #else /* not VMS (BSD, that is) */
1531 #ifndef DOS_NT
1532 XSETINT (Vtty_erase_char, tty.main.sg_erase);
1533 tty.main.sg_flags &= ~(ECHO | CRMOD | XTABS);
1534 if (meta_key)
1535 tty.main.sg_flags |= ANYP;
1536 tty.main.sg_flags |= interrupt_input ? RAW : CBREAK;
1537 #endif /* not DOS_NT */
1538 #endif /* not VMS (BSD, that is) */
1539 #endif /* not HAVE_TERMIO */
1540
1541 /* If going to use CBREAK mode, we must request C-g to interrupt
1542 and turn off start and stop chars, etc. If not going to use
1543 CBREAK mode, do this anyway so as to turn off local flow
1544 control for user coming over network on 4.2; in this case,
1545 only t_stopc and t_startc really matter. */
1546 #ifndef HAVE_TERMIO
1547 #ifdef HAVE_TCHARS
1548 /* Note: if not using CBREAK mode, it makes no difference how we
1549 set this */
1550 tty.tchars = new_tchars;
1551 tty.tchars.t_intrc = quit_char;
1552 if (tty_out->flow_control)
1553 {
1554 tty.tchars.t_startc = '\021';
1555 tty.tchars.t_stopc = '\023';
1556 }
1557
1558 tty.lmode = LDECCTQ | LLITOUT | LPASS8 | LNOFLSH | tty_out->old_tty.lmode;
1559 #ifdef ultrix
1560 /* Under Ultrix 4.2a, leaving this out doesn't seem to hurt
1561 anything, and leaving it in breaks the meta key. Go figure. */
1562 tty.lmode &= ~LLITOUT;
1563 #endif
1564
1565 #ifdef BSD4_1
1566 lmode = tty.lmode;
1567 #endif
1568
1569 #endif /* HAVE_TCHARS */
1570 #endif /* not HAVE_TERMIO */
1571
1572 #ifdef HAVE_LTCHARS
1573 tty.ltchars = new_ltchars;
1574 #endif /* HAVE_LTCHARS */
1575 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida, MW Aug 1993 */
1576 if (!tty_out->term_initted)
1577 internal_terminal_init ();
1578 dos_ttraw ();
1579 #endif
1580
1581 EMACS_SET_TTY (fileno (tty_out->input), &tty, 0);
1582
1583 /* This code added to insure that, if flow-control is not to be used,
1584 we have an unlocked terminal at the start. */
1585
1586 #ifdef TCXONC
1587 if (!tty_out->flow_control) ioctl (fileno (tty_out->input), TCXONC, 1);
1588 #endif
1589 #ifdef TIOCSTART
1590 if (!tty_out->flow_control) ioctl (fileno (tty_out->input), TIOCSTART, 0);
1591 #endif
1592
1593 #if defined (HAVE_TERMIOS) || defined (HPUX9)
1594 #ifdef TCOON
1595 if (!tty_out->flow_control) tcflow (fileno (tty_out->input), TCOON);
1596 #endif
1597 #endif
1598
1599 #ifdef AIXHFT
1600 hft_init (tty_out);
1601 #ifdef IBMR2AIX
1602 {
1603 /* IBM's HFT device usually thinks a ^J should be LF/CR. We need it
1604 to be only LF. This is the way that is done. */
1605 struct termio tty;
1606
1607 if (ioctl (1, HFTGETID, &tty) != -1)
1608 write (1, "\033[20l", 5);
1609 }
1610 #endif
1611 #endif /* AIXHFT */
1612
1613 #ifdef VMS
1614 /* Appears to do nothing when in PASTHRU mode.
1615 SYS$QIOW (0, fileno (tty_out->input), IO$_SETMODE|IO$M_OUTBAND, 0, 0, 0,
1616 interrupt_signal, oob_chars, 0, 0, 0, 0);
1617 */
1618 queue_kbd_input (0);
1619 #endif /* VMS */
1620
1621 #ifdef F_SETFL
1622 #ifdef F_GETOWN /* F_SETFL does not imply existence of F_GETOWN */
1623 if (interrupt_input)
1624 {
1625 old_fcntl_owner[fileno (tty_out->input)] =
1626 fcntl (fileno (tty_out->input), F_GETOWN, 0);
1627 fcntl (fileno (tty_out->input), F_SETOWN, getpid ());
1628 init_sigio (fileno (tty_out->input));
1629 #ifdef HAVE_GPM
1630 if (gpm_tty == tty_out)
1631 {
1632 /* Arrange for mouse events to give us SIGIO signals. */
1633 fcntl (gpm_fd, F_SETOWN, getpid ());
1634 fcntl (gpm_fd, F_SETFL, fcntl (gpm_fd, F_GETFL, 0) | O_NONBLOCK);
1635 init_sigio (gpm_fd);
1636 }
1637 #endif /* HAVE_GPM */
1638 }
1639 #endif /* F_GETOWN */
1640 #endif /* F_SETFL */
1641
1642 #ifdef BSD4_1
1643 if (interrupt_input)
1644 init_sigio (fileno (tty_out->input));
1645 #endif
1646
1647 #ifdef VMS /* VMS sometimes has this symbol but lacks setvbuf. */
1648 #undef _IOFBF
1649 #endif
1650 #ifdef _IOFBF
1651 /* This symbol is defined on recent USG systems.
1652 Someone says without this call USG won't really buffer the file
1653 even with a call to setbuf. */
1654 setvbuf (tty_out->output, (char *) _sobuf, _IOFBF, sizeof _sobuf);
1655 #else
1656 setbuf (tty_out->output, (char *) _sobuf);
1657 #endif
1658
1659 if (tty_out->terminal->set_terminal_modes_hook)
1660 tty_out->terminal->set_terminal_modes_hook (tty_out->terminal);
1661
1662 if (!tty_out->term_initted)
1663 {
1664 Lisp_Object tail, frame;
1665 FOR_EACH_FRAME (tail, frame)
1666 {
1667 /* XXX This needs to be revised. */
1668 if (FRAME_TERMCAP_P (XFRAME (frame))
1669 && FRAME_TTY (XFRAME (frame)) == tty_out)
1670 init_frame_faces (XFRAME (frame));
1671 }
1672 }
1673
1674 if (tty_out->term_initted && no_redraw_on_reenter)
1675 {
1676 /* XXX This seems wrong on multi-tty. */
1677 if (display_completed)
1678 direct_output_forward_char (0);
1679 }
1680 else
1681 {
1682 Lisp_Object tail, frame;
1683 frame_garbaged = 1;
1684 FOR_EACH_FRAME (tail, frame)
1685 {
1686 if (FRAME_TERMCAP_P (XFRAME (frame))
1687 && FRAME_TTY (XFRAME (frame)) == tty_out)
1688 FRAME_GARBAGED_P (XFRAME (frame)) = 1;
1689 }
1690 }
1691
1692 tty_out->term_initted = 1;
1693 }
1694
1695 /* Return nonzero if safe to use tabs in output.
1696 At the time this is called, init_sys_modes has not been done yet. */
1697
1698 int
1699 tabs_safe_p (int fd)
1700 {
1701 struct emacs_tty etty;
1702
1703 EMACS_GET_TTY (fd, &etty);
1704 return EMACS_TTY_TABS_OK (&etty);
1705 }
1706 \f
1707 /* Get terminal size from system.
1708 Store number of lines into *HEIGHTP and width into *WIDTHP.
1709 We store 0 if there's no valid information. */
1710
1711 void
1712 get_tty_size (int fd, int *widthp, int *heightp)
1713 {
1714
1715 #ifdef TIOCGWINSZ
1716
1717 /* BSD-style. */
1718 struct winsize size;
1719
1720 if (ioctl (fd, TIOCGWINSZ, &size) == -1)
1721 *widthp = *heightp = 0;
1722 else
1723 {
1724 *widthp = size.ws_col;
1725 *heightp = size.ws_row;
1726 }
1727
1728 #else
1729 #ifdef TIOCGSIZE
1730
1731 /* SunOS - style. */
1732 struct ttysize size;
1733
1734 if (ioctl (fd, TIOCGSIZE, &size) == -1)
1735 *widthp = *heightp = 0;
1736 else
1737 {
1738 *widthp = size.ts_cols;
1739 *heightp = size.ts_lines;
1740 }
1741
1742 #else
1743 #ifdef VMS
1744
1745 /* Use a fresh channel since the current one may have stale info
1746 (for example, from prior to a suspend); and to avoid a dependency
1747 in the init sequence. */
1748 int chan;
1749 struct sensemode tty;
1750
1751 SYS$ASSIGN (&input_dsc, &chan, 0, 0);
1752 SYS$QIOW (0, chan, IO$_SENSEMODE, &tty, 0, 0,
1753 &tty.class, 12, 0, 0, 0, 0);
1754 SYS$DASSGN (chan);
1755 *widthp = tty.scr_wid;
1756 *heightp = tty.scr_len;
1757
1758 #else
1759 #ifdef MSDOS
1760 *widthp = ScreenCols ();
1761 *heightp = ScreenRows ();
1762 #else /* system doesn't know size */
1763 *widthp = 0;
1764 *heightp = 0;
1765 #endif
1766 #endif /* not VMS */
1767 #endif /* not SunOS-style */
1768 #endif /* not BSD-style */
1769 }
1770
1771 /* Set the logical window size associated with descriptor FD
1772 to HEIGHT and WIDTH. This is used mainly with ptys. */
1773
1774 int
1775 set_window_size (fd, height, width)
1776 int fd, height, width;
1777 {
1778 #ifdef TIOCSWINSZ
1779
1780 /* BSD-style. */
1781 struct winsize size;
1782 size.ws_row = height;
1783 size.ws_col = width;
1784
1785 if (ioctl (fd, TIOCSWINSZ, &size) == -1)
1786 return 0; /* error */
1787 else
1788 return 1;
1789
1790 #else
1791 #ifdef TIOCSSIZE
1792
1793 /* SunOS - style. */
1794 struct ttysize size;
1795 size.ts_lines = height;
1796 size.ts_cols = width;
1797
1798 if (ioctl (fd, TIOCGSIZE, &size) == -1)
1799 return 0;
1800 else
1801 return 1;
1802 #else
1803 return -1;
1804 #endif /* not SunOS-style */
1805 #endif /* not BSD-style */
1806 }
1807
1808 \f
1809
1810 /* Prepare all terminal devices for exiting Emacs. */
1811
1812 void
1813 reset_all_sys_modes (void)
1814 {
1815 struct tty_display_info *tty;
1816 for (tty = tty_list; tty; tty = tty->next)
1817 reset_sys_modes (tty);
1818 }
1819
1820 /* Prepare the terminal for closing it; move the cursor to the
1821 bottom of the frame, turn off interrupt-driven I/O, etc. */
1822
1823 void
1824 reset_sys_modes (tty_out)
1825 struct tty_display_info *tty_out;
1826 {
1827 if (noninteractive)
1828 {
1829 fflush (stdout);
1830 return;
1831 }
1832 if (!tty_out->term_initted)
1833 return;
1834
1835 if (!tty_out->output)
1836 return; /* The tty is suspended. */
1837
1838 /* Go to and clear the last line of the terminal. */
1839
1840 cmgoto (tty_out, FrameRows (tty_out) - 1, 0);
1841
1842 /* Code adapted from tty_clear_end_of_line. */
1843 if (tty_out->TS_clr_line)
1844 {
1845 emacs_tputs (tty_out, tty_out->TS_clr_line, 1, cmputc);
1846 }
1847 else
1848 { /* have to do it the hard way */
1849 int i;
1850 tty_turn_off_insert (tty_out);
1851
1852 for (i = curX (tty_out); i < FrameCols (tty_out) - 1; i++)
1853 {
1854 fputc (' ', tty_out->output);
1855 }
1856 }
1857
1858 cmgoto (tty_out, FrameRows (tty_out) - 1, 0);
1859 fflush (tty_out->output);
1860
1861 #if defined (IBMR2AIX) && defined (AIXHFT)
1862 {
1863 /* HFT devices normally use ^J as a LF/CR. We forced it to
1864 do the LF only. Now, we need to reset it. */
1865 struct termio tty;
1866
1867 if (ioctl (1, HFTGETID, &tty) != -1)
1868 write (1, "\033[20h", 5);
1869 }
1870 #endif
1871
1872 if (tty_out->terminal->reset_terminal_modes_hook)
1873 tty_out->terminal->reset_terminal_modes_hook (tty_out->terminal);
1874
1875 #ifdef BSD_SYSTEM
1876 #ifndef BSD4_1
1877 /* Avoid possible loss of output when changing terminal modes. */
1878 fsync (fileno (tty_out->output));
1879 #endif
1880 #endif
1881
1882 #ifdef F_SETFL
1883 #ifdef F_SETOWN /* F_SETFL does not imply existence of F_SETOWN */
1884 if (interrupt_input)
1885 {
1886 reset_sigio (fileno (tty_out->input));
1887 fcntl (fileno (tty_out->input), F_SETOWN,
1888 old_fcntl_owner[fileno (tty_out->input)]);
1889 }
1890 #endif /* F_SETOWN */
1891 #ifdef O_NDELAY
1892 fcntl (fileno (tty_out->input), F_SETFL,
1893 fcntl (fileno (tty_out->input), F_GETFL, 0) & ~O_NDELAY);
1894 #endif
1895 #endif /* F_SETFL */
1896 #ifdef BSD4_1
1897 if (interrupt_input)
1898 reset_sigio (fileno (tty_out->input));
1899 #endif /* BSD4_1 */
1900
1901 if (tty_out->old_tty)
1902 while (EMACS_SET_TTY (fileno (tty_out->input),
1903 tty_out->old_tty, 0) < 0 && errno == EINTR)
1904 ;
1905
1906 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */
1907 dos_ttcooked ();
1908 #endif
1909
1910 #ifdef SET_LINE_DISCIPLINE
1911 /* Ultrix's termios *ignores* any line discipline except TERMIODISC.
1912 A different old line discipline is therefore not restored, yet.
1913 Restore the old line discipline by hand. */
1914 ioctl (0, TIOCSETD, &tty_out->old_tty.main.c_line);
1915 #endif
1916
1917 #ifdef AIXHFT
1918 hft_reset ();
1919 #endif
1920
1921 #ifdef BSD_PGRPS
1922 widen_foreground_group (fileno (tty_out->input));
1923 #endif
1924 }
1925 \f
1926 #ifdef HAVE_PTYS
1927
1928 /* Set up the proper status flags for use of a pty. */
1929
1930 void
1931 setup_pty (fd)
1932 int fd;
1933 {
1934 /* I'm told that TOICREMOTE does not mean control chars
1935 "can't be sent" but rather that they don't have
1936 input-editing or signaling effects.
1937 That should be good, because we have other ways
1938 to do those things in Emacs.
1939 However, telnet mode seems not to work on 4.2.
1940 So TIOCREMOTE is turned off now. */
1941
1942 /* Under hp-ux, if TIOCREMOTE is turned on, some calls
1943 will hang. In particular, the "timeout" feature (which
1944 causes a read to return if there is no data available)
1945 does this. Also it is known that telnet mode will hang
1946 in such a way that Emacs must be stopped (perhaps this
1947 is the same problem).
1948
1949 If TIOCREMOTE is turned off, then there is a bug in
1950 hp-ux which sometimes loses data. Apparently the
1951 code which blocks the master process when the internal
1952 buffer fills up does not work. Other than this,
1953 though, everything else seems to work fine.
1954
1955 Since the latter lossage is more benign, we may as well
1956 lose that way. -- cph */
1957 #ifdef FIONBIO
1958 #if defined(SYSV_PTYS) || defined(UNIX98_PTYS)
1959 {
1960 int on = 1;
1961 ioctl (fd, FIONBIO, &on);
1962 }
1963 #endif
1964 #endif
1965 }
1966 #endif /* HAVE_PTYS */
1967 \f
1968 #ifdef VMS
1969
1970 /* Assigning an input channel is done at the start of Emacs execution.
1971 This is called each time Emacs is resumed, also, but does nothing
1972 because input_chain is no longer zero. */
1973
1974 void
1975 init_vms_input ()
1976 {
1977 int status;
1978
1979 if (fileno (CURTTY ()->input)) == 0)
1980 {
1981 status = SYS$ASSIGN (&input_dsc, &fileno (CURTTY ()->input)), 0, 0);
1982 if (! (status & 1))
1983 LIB$STOP (status);
1984 }
1985 }
1986
1987 /* Deassigning the input channel is done before exiting. */
1988
1989 void
1990 stop_vms_input ()
1991 {
1992 return SYS$DASSGN (fileno (CURTTY ()->input)));
1993 }
1994
1995 short input_buffer;
1996
1997 /* Request reading one character into the keyboard buffer.
1998 This is done as soon as the buffer becomes empty. */
1999
2000 void
2001 queue_kbd_input ()
2002 {
2003 int status;
2004 extern kbd_input_ast ();
2005
2006 waiting_for_ast = 0;
2007 stop_input = 0;
2008 status = SYS$QIO (0, fileno (CURTTY()->input), IO$_READVBLK,
2009 &input_iosb, kbd_input_ast, 1,
2010 &input_buffer, 1, 0, terminator_mask, 0, 0);
2011 }
2012
2013 int input_count;
2014
2015 /* Ast routine that is called when keyboard input comes in
2016 in accord with the SYS$QIO above. */
2017
2018 void
2019 kbd_input_ast ()
2020 {
2021 register int c = -1;
2022 int old_errno = errno;
2023 extern EMACS_TIME *input_available_clear_time;
2024
2025 if (waiting_for_ast)
2026 SYS$SETEF (input_ef);
2027 waiting_for_ast = 0;
2028 input_count++;
2029 #ifdef ASTDEBUG
2030 if (input_count == 25)
2031 exit (1);
2032 printf ("Ast # %d,", input_count);
2033 printf (" iosb = %x, %x, %x, %x",
2034 input_iosb.offset, input_iosb.status, input_iosb.termlen,
2035 input_iosb.term);
2036 #endif
2037 if (input_iosb.offset)
2038 {
2039 c = input_buffer;
2040 #ifdef ASTDEBUG
2041 printf (", char = 0%o", c);
2042 #endif
2043 }
2044 #ifdef ASTDEBUG
2045 printf ("\n");
2046 fflush (stdout);
2047 sleep (1);
2048 #endif
2049 if (! stop_input)
2050 queue_kbd_input ();
2051 if (c >= 0)
2052 {
2053 struct input_event e;
2054 EVENT_INIT (e);
2055
2056 e.kind = ASCII_KEYSTROKE_EVENT;
2057 XSETINT (e.code, c);
2058 e.frame_or_window = selected_frame;
2059 kbd_buffer_store_event (&e);
2060 }
2061 if (input_available_clear_time)
2062 EMACS_SET_SECS_USECS (*input_available_clear_time, 0, 0);
2063 errno = old_errno;
2064 }
2065
2066 /* Wait until there is something in kbd_buffer. */
2067
2068 void
2069 wait_for_kbd_input ()
2070 {
2071 extern int have_process_input, process_exited;
2072
2073 /* If already something, avoid doing system calls. */
2074 if (detect_input_pending ())
2075 {
2076 return;
2077 }
2078 /* Clear a flag, and tell ast routine above to set it. */
2079 SYS$CLREF (input_ef);
2080 waiting_for_ast = 1;
2081 /* Check for timing error: ast happened while we were doing that. */
2082 if (!detect_input_pending ())
2083 {
2084 /* No timing error: wait for flag to be set. */
2085 set_waiting_for_input (0);
2086 SYS$WFLOR (input_ef, input_eflist);
2087 clear_waiting_for_input ();
2088 if (!detect_input_pending ())
2089 /* Check for subprocess input availability */
2090 {
2091 int dsp = have_process_input || process_exited;
2092
2093 SYS$CLREF (process_ef);
2094 if (have_process_input)
2095 process_command_input ();
2096 if (process_exited)
2097 process_exit ();
2098 if (dsp)
2099 {
2100 update_mode_lines++;
2101 prepare_menu_bars ();
2102 redisplay_preserve_echo_area (18);
2103 }
2104 }
2105 }
2106 waiting_for_ast = 0;
2107 }
2108
2109 /* Get rid of any pending QIO, when we are about to suspend
2110 or when we want to throw away pending input.
2111 We wait for a positive sign that the AST routine has run
2112 and therefore there is no I/O request queued when we return.
2113 SYS$SETAST is used to avoid a timing error. */
2114
2115 void
2116 end_kbd_input ()
2117 {
2118 #ifdef ASTDEBUG
2119 printf ("At end_kbd_input.\n");
2120 fflush (stdout);
2121 sleep (1);
2122 #endif
2123 if (LIB$AST_IN_PROG ()) /* Don't wait if suspending from kbd_buffer_store_event! */
2124 {
2125 SYS$CANCEL (fileno (CURTTY()->input));
2126 return;
2127 }
2128
2129 SYS$SETAST (0);
2130 /* Clear a flag, and tell ast routine above to set it. */
2131 SYS$CLREF (input_ef);
2132 waiting_for_ast = 1;
2133 stop_input = 1;
2134 SYS$CANCEL (fileno (CURTTY()->input));
2135 SYS$SETAST (1);
2136 SYS$WAITFR (input_ef);
2137 waiting_for_ast = 0;
2138 }
2139
2140 /* Wait for either input available or time interval expiry. */
2141
2142 void
2143 input_wait_timeout (timeval)
2144 int timeval; /* Time to wait, in seconds */
2145 {
2146 int time [2];
2147 static int zero = 0;
2148 static int large = -10000000;
2149
2150 LIB$EMUL (&timeval, &large, &zero, time); /* Convert to VMS format */
2151
2152 /* If already something, avoid doing system calls. */
2153 if (detect_input_pending ())
2154 {
2155 return;
2156 }
2157 /* Clear a flag, and tell ast routine above to set it. */
2158 SYS$CLREF (input_ef);
2159 waiting_for_ast = 1;
2160 /* Check for timing error: ast happened while we were doing that. */
2161 if (!detect_input_pending ())
2162 {
2163 /* No timing error: wait for flag to be set. */
2164 SYS$CANTIM (1, 0);
2165 if (SYS$SETIMR (timer_ef, time, 0, 1) & 1) /* Set timer */
2166 SYS$WFLOR (timer_ef, timer_eflist); /* Wait for timer expiry or input */
2167 }
2168 waiting_for_ast = 0;
2169 }
2170
2171 /* The standard `sleep' routine works some other way
2172 and it stops working if you have ever quit out of it.
2173 This one continues to work. */
2174
2175 sys_sleep (timeval)
2176 int timeval;
2177 {
2178 int time [2];
2179 static int zero = 0;
2180 static int large = -10000000;
2181
2182 LIB$EMUL (&timeval, &large, &zero, time); /* Convert to VMS format */
2183
2184 SYS$CANTIM (1, 0);
2185 if (SYS$SETIMR (timer_ef, time, 0, 1) & 1) /* Set timer */
2186 SYS$WAITFR (timer_ef); /* Wait for timer expiry only */
2187 }
2188
2189 void
2190 init_sigio (fd)
2191 int fd;
2192 {
2193 request_sigio ();
2194 }
2195
2196 reset_sigio (fd)
2197 int fd;
2198 {
2199 unrequest_sigio ();
2200 }
2201
2202 void
2203 request_sigio ()
2204 {
2205 if (noninteractive)
2206 return;
2207 croak ("request sigio");
2208 }
2209
2210 void
2211 unrequest_sigio ()
2212 {
2213 if (noninteractive)
2214 return;
2215 croak ("unrequest sigio");
2216 }
2217
2218 #endif /* VMS */
2219 \f
2220 /* Note that VMS compiler won't accept defined (CANNOT_DUMP). */
2221 #ifndef CANNOT_DUMP
2222 #define NEED_STARTS
2223 #endif
2224
2225 #ifndef SYSTEM_MALLOC
2226 #ifndef NEED_STARTS
2227 #define NEED_STARTS
2228 #endif
2229 #endif
2230
2231 #ifdef NEED_STARTS
2232 /* Some systems that cannot dump also cannot implement these. */
2233
2234 /*
2235 * Return the address of the start of the text segment prior to
2236 * doing an unexec. After unexec the return value is undefined.
2237 * See crt0.c for further explanation and _start.
2238 *
2239 */
2240
2241 #if !(defined (__NetBSD__) && defined (__ELF__))
2242 #ifndef HAVE_TEXT_START
2243 char *
2244 start_of_text ()
2245 {
2246 #ifdef TEXT_START
2247 return ((char *) TEXT_START);
2248 #else
2249 extern int _start ();
2250 return ((char *) _start);
2251 #endif /* TEXT_START */
2252 }
2253 #endif /* not HAVE_TEXT_START */
2254 #endif
2255
2256 /*
2257 * Return the address of the start of the data segment prior to
2258 * doing an unexec. After unexec the return value is undefined.
2259 * See crt0.c for further information and definition of data_start.
2260 *
2261 * Apparently, on BSD systems this is etext at startup. On
2262 * USG systems (swapping) this is highly mmu dependent and
2263 * is also dependent on whether or not the program is running
2264 * with shared text. Generally there is a (possibly large)
2265 * gap between end of text and start of data with shared text.
2266 *
2267 * On Uniplus+ systems with shared text, data starts at a
2268 * fixed address. Each port (from a given oem) is generally
2269 * different, and the specific value of the start of data can
2270 * be obtained via the UniPlus+ specific "uvar" system call,
2271 * however the method outlined in crt0.c seems to be more portable.
2272 *
2273 * Probably what will have to happen when a USG unexec is available,
2274 * at least on UniPlus, is temacs will have to be made unshared so
2275 * that text and data are contiguous. Then once loadup is complete,
2276 * unexec will produce a shared executable where the data can be
2277 * at the normal shared text boundary and the startofdata variable
2278 * will be patched by unexec to the correct value.
2279 *
2280 */
2281
2282 #ifndef start_of_data
2283 char *
2284 start_of_data ()
2285 {
2286 #ifdef DATA_START
2287 return ((char *) DATA_START);
2288 #else
2289 #ifdef ORDINARY_LINK
2290 /*
2291 * This is a hack. Since we're not linking crt0.c or pre_crt0.c,
2292 * data_start isn't defined. We take the address of environ, which
2293 * is known to live at or near the start of the system crt0.c, and
2294 * we don't sweat the handful of bytes that might lose.
2295 */
2296 extern char **environ;
2297
2298 return ((char *) &environ);
2299 #else
2300 extern int data_start;
2301 return ((char *) &data_start);
2302 #endif /* ORDINARY_LINK */
2303 #endif /* DATA_START */
2304 }
2305 #endif /* start_of_data */
2306 #endif /* NEED_STARTS (not CANNOT_DUMP or not SYSTEM_MALLOC) */
2307 \f
2308 /* init_system_name sets up the string for the Lisp function
2309 system-name to return. */
2310
2311 #ifdef BSD4_1
2312 #include <whoami.h>
2313 #endif
2314
2315 extern Lisp_Object Vsystem_name;
2316
2317 #ifndef BSD4_1
2318 #ifndef VMS
2319 #ifdef HAVE_SOCKETS
2320 #include <sys/socket.h>
2321 #include <netdb.h>
2322 #endif /* HAVE_SOCKETS */
2323 #endif /* not VMS */
2324 #endif /* not BSD4_1 */
2325
2326 #ifdef TRY_AGAIN
2327 #ifndef HAVE_H_ERRNO
2328 extern int h_errno;
2329 #endif
2330 #endif /* TRY_AGAIN */
2331
2332 void
2333 init_system_name ()
2334 {
2335 #ifdef BSD4_1
2336 Vsystem_name = build_string (sysname);
2337 #else
2338 #ifdef VMS
2339 char *sp, *end;
2340 if ((sp = egetenv ("SYS$NODE")) == 0)
2341 Vsystem_name = build_string ("vax-vms");
2342 else if ((end = index (sp, ':')) == 0)
2343 Vsystem_name = build_string (sp);
2344 else
2345 Vsystem_name = make_string (sp, end - sp);
2346 #else
2347 #ifndef HAVE_GETHOSTNAME
2348 struct utsname uts;
2349 uname (&uts);
2350 Vsystem_name = build_string (uts.nodename);
2351 #else /* HAVE_GETHOSTNAME */
2352 unsigned int hostname_size = 256;
2353 char *hostname = (char *) alloca (hostname_size);
2354
2355 /* Try to get the host name; if the buffer is too short, try
2356 again. Apparently, the only indication gethostname gives of
2357 whether the buffer was large enough is the presence or absence
2358 of a '\0' in the string. Eech. */
2359 for (;;)
2360 {
2361 gethostname (hostname, hostname_size - 1);
2362 hostname[hostname_size - 1] = '\0';
2363
2364 /* Was the buffer large enough for the '\0'? */
2365 if (strlen (hostname) < hostname_size - 1)
2366 break;
2367
2368 hostname_size <<= 1;
2369 hostname = (char *) alloca (hostname_size);
2370 }
2371 #ifdef HAVE_SOCKETS
2372 /* Turn the hostname into the official, fully-qualified hostname.
2373 Don't do this if we're going to dump; this can confuse system
2374 libraries on some machines and make the dumped emacs core dump. */
2375 #ifndef CANNOT_DUMP
2376 if (initialized)
2377 #endif /* not CANNOT_DUMP */
2378 if (! index (hostname, '.'))
2379 {
2380 int count;
2381 #ifdef HAVE_GETADDRINFO
2382 struct addrinfo *res;
2383 struct addrinfo hints;
2384 int ret;
2385
2386 memset (&hints, 0, sizeof(hints));
2387 hints.ai_socktype = SOCK_STREAM;
2388 hints.ai_flags = AI_CANONNAME;
2389
2390 for (count = 0;; count++)
2391 {
2392 if ((ret = getaddrinfo (hostname, NULL, &hints, &res)) == 0
2393 || ret != EAI_AGAIN)
2394 break;
2395
2396 if (count >= 5)
2397 break;
2398 Fsleep_for (make_number (1), Qnil);
2399 }
2400
2401 if (ret == 0)
2402 {
2403 struct addrinfo *it = res;
2404 while (it)
2405 {
2406 char *fqdn = it->ai_canonname;
2407 if (fqdn && index (fqdn, '.')
2408 && strcmp (fqdn, "localhost.localdomain") != 0)
2409 break;
2410 it = it->ai_next;
2411 }
2412 if (it)
2413 {
2414 hostname = alloca (strlen (it->ai_canonname) + 1);
2415 strcpy (hostname, it->ai_canonname);
2416 }
2417 freeaddrinfo (res);
2418 }
2419 #else /* !HAVE_GETADDRINFO */
2420 struct hostent *hp;
2421 for (count = 0;; count++)
2422 {
2423
2424 #ifdef TRY_AGAIN
2425 h_errno = 0;
2426 #endif
2427 hp = gethostbyname (hostname);
2428 #ifdef TRY_AGAIN
2429 if (! (hp == 0 && h_errno == TRY_AGAIN))
2430 #endif
2431
2432 break;
2433
2434 if (count >= 5)
2435 break;
2436 Fsleep_for (make_number (1), Qnil);
2437 }
2438
2439 if (hp)
2440 {
2441 char *fqdn = (char *) hp->h_name;
2442 #if 0
2443 char *p;
2444 #endif
2445
2446 if (!index (fqdn, '.'))
2447 {
2448 /* We still don't have a fully qualified domain name.
2449 Try to find one in the list of alternate names */
2450 char **alias = hp->h_aliases;
2451 while (*alias
2452 && (!index (*alias, '.')
2453 || !strcmp (*alias, "localhost.localdomain")))
2454 alias++;
2455 if (*alias)
2456 fqdn = *alias;
2457 }
2458 hostname = fqdn;
2459 #if 0
2460 /* Convert the host name to lower case. */
2461 /* Using ctype.h here would introduce a possible locale
2462 dependence that is probably wrong for hostnames. */
2463 p = hostname;
2464 while (*p)
2465 {
2466 if (*p >= 'A' && *p <= 'Z')
2467 *p += 'a' - 'A';
2468 p++;
2469 }
2470 #endif
2471 }
2472 #endif /* !HAVE_GETADDRINFO */
2473 }
2474 #endif /* HAVE_SOCKETS */
2475 /* We used to try using getdomainname here,
2476 but NIIBE Yutaka <gniibe@etl.go.jp> says that
2477 getdomainname gets the NIS/YP domain which often is not the same
2478 as in Internet domain name. */
2479 #if 0 /* Turned off because sysinfo is not really likely to return the
2480 correct Internet domain. */
2481 #if (HAVE_SYSINFO && defined (SI_SRPC_DOMAIN))
2482 if (! index (hostname, '.'))
2483 {
2484 /* The hostname is not fully qualified. Append the domain name. */
2485
2486 int hostlen = strlen (hostname);
2487 int domain_size = 256;
2488
2489 for (;;)
2490 {
2491 char *domain = (char *) alloca (domain_size + 1);
2492 char *fqdn = (char *) alloca (hostlen + 1 + domain_size + 1);
2493 int sys_domain_size = sysinfo (SI_SRPC_DOMAIN, domain, domain_size);
2494 if (sys_domain_size <= 0)
2495 break;
2496 if (domain_size < sys_domain_size)
2497 {
2498 domain_size = sys_domain_size;
2499 continue;
2500 }
2501 strcpy (fqdn, hostname);
2502 if (domain[0] == '.')
2503 strcpy (fqdn + hostlen, domain);
2504 else if (domain[0] != 0)
2505 {
2506 fqdn[hostlen] = '.';
2507 strcpy (fqdn + hostlen + 1, domain);
2508 }
2509 hostname = fqdn;
2510 break;
2511 }
2512 }
2513 #endif /* HAVE_SYSINFO && defined (SI_SRPC_DOMAIN) */
2514 #endif /* 0 */
2515 Vsystem_name = build_string (hostname);
2516 #endif /* HAVE_GETHOSTNAME */
2517 #endif /* VMS */
2518 #endif /* BSD4_1 */
2519 {
2520 unsigned char *p;
2521 for (p = SDATA (Vsystem_name); *p; p++)
2522 if (*p == ' ' || *p == '\t')
2523 *p = '-';
2524 }
2525 }
2526 \f
2527 #ifndef MSDOS
2528 #ifndef VMS
2529 #if !defined (HAVE_SELECT)
2530
2531 #include "sysselect.h"
2532 #undef select
2533
2534 #if defined (HAVE_X_WINDOWS) && !defined (HAVE_SELECT)
2535 /* Cause explanatory error message at compile time,
2536 since the select emulation is not good enough for X. */
2537 int *x = &x_windows_lose_if_no_select_system_call;
2538 #endif
2539
2540 /* Emulate as much as select as is possible under 4.1 and needed by Gnu Emacs
2541 * Only checks read descriptors.
2542 */
2543 /* How long to wait between checking fds in select */
2544 #define SELECT_PAUSE 1
2545 int select_alarmed;
2546
2547 /* For longjmp'ing back to read_input_waiting. */
2548
2549 jmp_buf read_alarm_throw;
2550
2551 /* Nonzero if the alarm signal should throw back to read_input_waiting.
2552 The read_socket_hook function sets this to 1 while it is waiting. */
2553
2554 int read_alarm_should_throw;
2555
2556 SIGTYPE
2557 select_alarm ()
2558 {
2559 select_alarmed = 1;
2560 #ifdef BSD4_1
2561 sigrelse (SIGALRM);
2562 #else /* not BSD4_1 */
2563 signal (SIGALRM, SIG_IGN);
2564 #endif /* not BSD4_1 */
2565 SIGNAL_THREAD_CHECK (SIGALRM);
2566 if (read_alarm_should_throw)
2567 longjmp (read_alarm_throw, 1);
2568 }
2569
2570 #ifndef WINDOWSNT
2571 /* Only rfds are checked. */
2572 int
2573 sys_select (nfds, rfds, wfds, efds, timeout)
2574 int nfds;
2575 SELECT_TYPE *rfds, *wfds, *efds;
2576 EMACS_TIME *timeout;
2577 {
2578 /* XXX This needs to be updated for multi-tty support. Is there
2579 anybody who needs to emulate select these days? */
2580 int ravail = 0;
2581 SELECT_TYPE orfds;
2582 int timeoutval;
2583 int *local_timeout;
2584 extern int proc_buffered_char[];
2585 #ifndef subprocesses
2586 int process_tick = 0, update_tick = 0;
2587 #else
2588 extern int process_tick, update_tick;
2589 #endif
2590 unsigned char buf;
2591
2592 #if defined (HAVE_SELECT) && defined (HAVE_X_WINDOWS)
2593 /* If we're using X, then the native select will work; we only need the
2594 emulation for non-X usage. */
2595 if (!NILP (Vinitial_window_system))
2596 return select (nfds, rfds, wfds, efds, timeout);
2597 #endif
2598 timeoutval = timeout ? EMACS_SECS (*timeout) : 100000;
2599 local_timeout = &timeoutval;
2600 FD_ZERO (&orfds);
2601 if (rfds)
2602 {
2603 orfds = *rfds;
2604 FD_ZERO (rfds);
2605 }
2606 if (wfds)
2607 FD_ZERO (wfds);
2608 if (efds)
2609 FD_ZERO (efds);
2610
2611 /* If we are looking only for the terminal, with no timeout,
2612 just read it and wait -- that's more efficient. */
2613 if (*local_timeout == 100000 && process_tick == update_tick
2614 && FD_ISSET (0, &orfds))
2615 {
2616 int fd;
2617 for (fd = 1; fd < nfds; ++fd)
2618 if (FD_ISSET (fd, &orfds))
2619 goto hardway;
2620 if (! detect_input_pending ())
2621 read_input_waiting ();
2622 FD_SET (0, rfds);
2623 return 1;
2624 }
2625
2626 hardway:
2627 /* Once a second, till the timer expires, check all the flagged read
2628 * descriptors to see if any input is available. If there is some then
2629 * set the corresponding bit in the return copy of rfds.
2630 */
2631 while (1)
2632 {
2633 register int to_check, fd;
2634
2635 if (rfds)
2636 {
2637 for (to_check = nfds, fd = 0; --to_check >= 0; fd++)
2638 {
2639 if (FD_ISSET (fd, &orfds))
2640 {
2641 int avail = 0, status = 0;
2642
2643 if (fd == 0)
2644 avail = detect_input_pending (); /* Special keyboard handler */
2645 else
2646 {
2647 #ifdef FIONREAD
2648 status = ioctl (fd, FIONREAD, &avail);
2649 #else /* no FIONREAD */
2650 /* Hoping it will return -1 if nothing available
2651 or 0 if all 0 chars requested are read. */
2652 if (proc_buffered_char[fd] >= 0)
2653 avail = 1;
2654 else
2655 {
2656 avail = read (fd, &buf, 1);
2657 if (avail > 0)
2658 proc_buffered_char[fd] = buf;
2659 }
2660 #endif /* no FIONREAD */
2661 }
2662 if (status >= 0 && avail > 0)
2663 {
2664 FD_SET (fd, rfds);
2665 ravail++;
2666 }
2667 }
2668 }
2669 }
2670 if (*local_timeout == 0 || ravail != 0 || process_tick != update_tick)
2671 break;
2672
2673 turn_on_atimers (0);
2674 signal (SIGALRM, select_alarm);
2675 select_alarmed = 0;
2676 alarm (SELECT_PAUSE);
2677
2678 /* Wait for a SIGALRM (or maybe a SIGTINT) */
2679 while (select_alarmed == 0 && *local_timeout != 0
2680 && process_tick == update_tick)
2681 {
2682 /* If we are interested in terminal input,
2683 wait by reading the terminal.
2684 That makes instant wakeup for terminal input at least. */
2685 if (FD_ISSET (0, &orfds))
2686 {
2687 read_input_waiting ();
2688 if (detect_input_pending ())
2689 select_alarmed = 1;
2690 }
2691 else
2692 pause ();
2693 }
2694 (*local_timeout) -= SELECT_PAUSE;
2695
2696 /* Reset the old alarm if there was one. */
2697 turn_on_atimers (1);
2698
2699 if (*local_timeout == 0) /* Stop on timer being cleared */
2700 break;
2701 }
2702 return ravail;
2703 }
2704 #endif /* not WINDOWSNT */
2705
2706 /* Read keyboard input into the standard buffer,
2707 waiting for at least one character. */
2708
2709 void
2710 read_input_waiting ()
2711 {
2712 /* XXX This needs to be updated for multi-tty support. Is there
2713 anybody who needs to emulate select these days? */
2714 int nread, i;
2715 extern int quit_char;
2716
2717 if (read_socket_hook)
2718 {
2719 struct input_event hold_quit;
2720
2721 EVENT_INIT (hold_quit);
2722 hold_quit.kind = NO_EVENT;
2723
2724 read_alarm_should_throw = 0;
2725 if (! setjmp (read_alarm_throw))
2726 nread = (*read_socket_hook) (0, 1, &hold_quit);
2727 else
2728 nread = -1;
2729
2730 if (hold_quit.kind != NO_EVENT)
2731 kbd_buffer_store_event (&hold_quit);
2732 }
2733 else
2734 {
2735 struct input_event e;
2736 char buf[3];
2737 nread = read (fileno (stdin), buf, 1);
2738 EVENT_INIT (e);
2739
2740 /* Scan the chars for C-g and store them in kbd_buffer. */
2741 e.kind = ASCII_KEYSTROKE_EVENT;
2742 e.frame_or_window = selected_frame;
2743 e.modifiers = 0;
2744 for (i = 0; i < nread; i++)
2745 {
2746 /* Convert chars > 0177 to meta events if desired.
2747 We do this under the same conditions that read_avail_input does. */
2748 if (read_socket_hook == 0)
2749 {
2750 /* If the user says she has a meta key, then believe her. */
2751 if (meta_key == 1 && (buf[i] & 0x80))
2752 e.modifiers = meta_modifier;
2753 if (meta_key != 2)
2754 buf[i] &= ~0x80;
2755 }
2756
2757 XSETINT (e.code, buf[i]);
2758 kbd_buffer_store_event (&e);
2759 /* Don't look at input that follows a C-g too closely.
2760 This reduces lossage due to autorepeat on C-g. */
2761 if (buf[i] == quit_char)
2762 break;
2763 }
2764 }
2765 }
2766
2767 #if !defined (HAVE_SELECT)
2768 #define select sys_select
2769 #endif
2770
2771 #endif /* not HAVE_SELECT */
2772 #endif /* not VMS */
2773 #endif /* not MSDOS */
2774 \f
2775 #ifdef BSD4_1
2776 void
2777 init_sigio (fd)
2778 int fd;
2779 {
2780 if (noninteractive)
2781 return;
2782 lmode = LINTRUP | lmode;
2783 ioctl (fd, TIOCLSET, &lmode);
2784 }
2785
2786 void
2787 reset_sigio (fd)
2788 int fd;
2789 {
2790 if (noninteractive)
2791 return;
2792 lmode = ~LINTRUP & lmode;
2793 ioctl (fd, TIOCLSET, &lmode);
2794 }
2795
2796 void
2797 request_sigio ()
2798 {
2799 if (noninteractive)
2800 return;
2801 sigrelse (SIGTINT);
2802
2803 interrupts_deferred = 0;
2804 }
2805
2806 void
2807 unrequest_sigio ()
2808 {
2809 if (noninteractive)
2810 return;
2811 sighold (SIGTINT);
2812
2813 interrupts_deferred = 1;
2814 }
2815
2816 /* still inside #ifdef BSD4_1 */
2817 #ifdef subprocesses
2818
2819 int sigheld; /* Mask of held signals */
2820
2821 void
2822 sigholdx (signum)
2823 int signum;
2824 {
2825 sigheld |= sigbit (signum);
2826 sighold (signum);
2827 }
2828
2829 void
2830 sigisheld (signum)
2831 int signum;
2832 {
2833 sigheld |= sigbit (signum);
2834 }
2835
2836 void
2837 sigunhold (signum)
2838 int signum;
2839 {
2840 sigheld &= ~sigbit (signum);
2841 sigrelse (signum);
2842 }
2843
2844 void
2845 sigfree () /* Free all held signals */
2846 {
2847 int i;
2848 for (i = 0; i < NSIG; i++)
2849 if (sigheld & sigbit (i))
2850 sigrelse (i);
2851 sigheld = 0;
2852 }
2853
2854 int
2855 sigbit (i)
2856 {
2857 return 1 << (i - 1);
2858 }
2859 #endif /* subprocesses */
2860 #endif /* BSD4_1 */
2861 \f
2862 /* POSIX signals support - DJB */
2863 /* Anyone with POSIX signals should have ANSI C declarations */
2864
2865 #ifdef POSIX_SIGNALS
2866
2867 sigset_t empty_mask, full_mask;
2868
2869 signal_handler_t
2870 sys_signal (int signal_number, signal_handler_t action)
2871 {
2872 struct sigaction new_action, old_action;
2873 sigemptyset (&new_action.sa_mask);
2874 new_action.sa_handler = action;
2875 #if defined (SA_RESTART) && ! defined (BROKEN_SA_RESTART) && !defined(SYNC_INPUT)
2876 /* Emacs mostly works better with restartable system services. If this
2877 flag exists, we probably want to turn it on here.
2878 However, on some systems this resets the timeout of `select'
2879 which means that `select' never finishes if it keeps getting signals.
2880 BROKEN_SA_RESTART is defined on those systems. */
2881 /* It's not clear why the comment above says "mostly works better". --Stef
2882 When SYNC_INPUT is set, we don't want SA_RESTART because we need to poll
2883 for pending input so we need long-running syscalls to be interrupted
2884 after a signal that sets the interrupt_input_pending flag. */
2885 new_action.sa_flags = SA_RESTART;
2886 #else
2887 new_action.sa_flags = 0;
2888 #endif
2889 sigaction (signal_number, &new_action, &old_action);
2890 return (old_action.sa_handler);
2891 }
2892
2893 #ifndef __GNUC__
2894 /* If we're compiling with GCC, we don't need this function, since it
2895 can be written as a macro. */
2896 sigset_t
2897 sys_sigmask (int sig)
2898 {
2899 sigset_t mask;
2900 sigemptyset (&mask);
2901 sigaddset (&mask, sig);
2902 return mask;
2903 }
2904 #endif
2905
2906 /* I'd like to have these guys return pointers to the mask storage in here,
2907 but there'd be trouble if the code was saving multiple masks. I'll be
2908 safe and pass the structure. It normally won't be more than 2 bytes
2909 anyhow. - DJB */
2910
2911 sigset_t
2912 sys_sigblock (sigset_t new_mask)
2913 {
2914 sigset_t old_mask;
2915 sigprocmask (SIG_BLOCK, &new_mask, &old_mask);
2916 return (old_mask);
2917 }
2918
2919 sigset_t
2920 sys_sigunblock (sigset_t new_mask)
2921 {
2922 sigset_t old_mask;
2923 sigprocmask (SIG_UNBLOCK, &new_mask, &old_mask);
2924 return (old_mask);
2925 }
2926
2927 sigset_t
2928 sys_sigsetmask (sigset_t new_mask)
2929 {
2930 sigset_t old_mask;
2931 sigprocmask (SIG_SETMASK, &new_mask, &old_mask);
2932 return (old_mask);
2933 }
2934
2935 #endif /* POSIX_SIGNALS */
2936 \f
2937 #if !defined HAVE_STRSIGNAL && !HAVE_DECL_SYS_SIGLIST
2938 static char *my_sys_siglist[NSIG];
2939 # ifdef sys_siglist
2940 # undef sys_siglist
2941 # endif
2942 # define sys_siglist my_sys_siglist
2943 #endif
2944
2945 void
2946 init_signals ()
2947 {
2948 #ifdef POSIX_SIGNALS
2949 sigemptyset (&empty_mask);
2950 sigfillset (&full_mask);
2951 #endif
2952
2953 #if !defined HAVE_STRSIGNAL && !HAVE_DECL_SYS_SIGLIST
2954 if (! initialized)
2955 {
2956 # ifdef SIGABRT
2957 sys_siglist[SIGABRT] = "Aborted";
2958 # endif
2959 # ifdef SIGAIO
2960 sys_siglist[SIGAIO] = "LAN I/O interrupt";
2961 # endif
2962 # ifdef SIGALRM
2963 sys_siglist[SIGALRM] = "Alarm clock";
2964 # endif
2965 # ifdef SIGBUS
2966 sys_siglist[SIGBUS] = "Bus error";
2967 # endif
2968 # ifdef SIGCLD
2969 sys_siglist[SIGCLD] = "Child status changed";
2970 # endif
2971 # ifdef SIGCHLD
2972 sys_siglist[SIGCHLD] = "Child status changed";
2973 # endif
2974 # ifdef SIGCONT
2975 sys_siglist[SIGCONT] = "Continued";
2976 # endif
2977 # ifdef SIGDANGER
2978 sys_siglist[SIGDANGER] = "Swap space dangerously low";
2979 # endif
2980 # ifdef SIGDGNOTIFY
2981 sys_siglist[SIGDGNOTIFY] = "Notification message in queue";
2982 # endif
2983 # ifdef SIGEMT
2984 sys_siglist[SIGEMT] = "Emulation trap";
2985 # endif
2986 # ifdef SIGFPE
2987 sys_siglist[SIGFPE] = "Arithmetic exception";
2988 # endif
2989 # ifdef SIGFREEZE
2990 sys_siglist[SIGFREEZE] = "SIGFREEZE";
2991 # endif
2992 # ifdef SIGGRANT
2993 sys_siglist[SIGGRANT] = "Monitor mode granted";
2994 # endif
2995 # ifdef SIGHUP
2996 sys_siglist[SIGHUP] = "Hangup";
2997 # endif
2998 # ifdef SIGILL
2999 sys_siglist[SIGILL] = "Illegal instruction";
3000 # endif
3001 # ifdef SIGINT
3002 sys_siglist[SIGINT] = "Interrupt";
3003 # endif
3004 # ifdef SIGIO
3005 sys_siglist[SIGIO] = "I/O possible";
3006 # endif
3007 # ifdef SIGIOINT
3008 sys_siglist[SIGIOINT] = "I/O intervention required";
3009 # endif
3010 # ifdef SIGIOT
3011 sys_siglist[SIGIOT] = "IOT trap";
3012 # endif
3013 # ifdef SIGKILL
3014 sys_siglist[SIGKILL] = "Killed";
3015 # endif
3016 # ifdef SIGLOST
3017 sys_siglist[SIGLOST] = "Resource lost";
3018 # endif
3019 # ifdef SIGLWP
3020 sys_siglist[SIGLWP] = "SIGLWP";
3021 # endif
3022 # ifdef SIGMSG
3023 sys_siglist[SIGMSG] = "Monitor mode data available";
3024 # endif
3025 # ifdef SIGPHONE
3026 sys_siglist[SIGWIND] = "SIGPHONE";
3027 # endif
3028 # ifdef SIGPIPE
3029 sys_siglist[SIGPIPE] = "Broken pipe";
3030 # endif
3031 # ifdef SIGPOLL
3032 sys_siglist[SIGPOLL] = "Pollable event occurred";
3033 # endif
3034 # ifdef SIGPROF
3035 sys_siglist[SIGPROF] = "Profiling timer expired";
3036 # endif
3037 # ifdef SIGPTY
3038 sys_siglist[SIGPTY] = "PTY I/O interrupt";
3039 # endif
3040 # ifdef SIGPWR
3041 sys_siglist[SIGPWR] = "Power-fail restart";
3042 # endif
3043 # ifdef SIGQUIT
3044 sys_siglist[SIGQUIT] = "Quit";
3045 # endif
3046 # ifdef SIGRETRACT
3047 sys_siglist[SIGRETRACT] = "Need to relinguish monitor mode";
3048 # endif
3049 # ifdef SIGSAK
3050 sys_siglist[SIGSAK] = "Secure attention";
3051 # endif
3052 # ifdef SIGSEGV
3053 sys_siglist[SIGSEGV] = "Segmentation violation";
3054 # endif
3055 # ifdef SIGSOUND
3056 sys_siglist[SIGSOUND] = "Sound completed";
3057 # endif
3058 # ifdef SIGSTOP
3059 sys_siglist[SIGSTOP] = "Stopped (signal)";
3060 # endif
3061 # ifdef SIGSTP
3062 sys_siglist[SIGSTP] = "Stopped (user)";
3063 # endif
3064 # ifdef SIGSYS
3065 sys_siglist[SIGSYS] = "Bad argument to system call";
3066 # endif
3067 # ifdef SIGTERM
3068 sys_siglist[SIGTERM] = "Terminated";
3069 # endif
3070 # ifdef SIGTHAW
3071 sys_siglist[SIGTHAW] = "SIGTHAW";
3072 # endif
3073 # ifdef SIGTRAP
3074 sys_siglist[SIGTRAP] = "Trace/breakpoint trap";
3075 # endif
3076 # ifdef SIGTSTP
3077 sys_siglist[SIGTSTP] = "Stopped (user)";
3078 # endif
3079 # ifdef SIGTTIN
3080 sys_siglist[SIGTTIN] = "Stopped (tty input)";
3081 # endif
3082 # ifdef SIGTTOU
3083 sys_siglist[SIGTTOU] = "Stopped (tty output)";
3084 # endif
3085 # ifdef SIGURG
3086 sys_siglist[SIGURG] = "Urgent I/O condition";
3087 # endif
3088 # ifdef SIGUSR1
3089 sys_siglist[SIGUSR1] = "User defined signal 1";
3090 # endif
3091 # ifdef SIGUSR2
3092 sys_siglist[SIGUSR2] = "User defined signal 2";
3093 # endif
3094 # ifdef SIGVTALRM
3095 sys_siglist[SIGVTALRM] = "Virtual timer expired";
3096 # endif
3097 # ifdef SIGWAITING
3098 sys_siglist[SIGWAITING] = "Process's LWPs are blocked";
3099 # endif
3100 # ifdef SIGWINCH
3101 sys_siglist[SIGWINCH] = "Window size changed";
3102 # endif
3103 # ifdef SIGWIND
3104 sys_siglist[SIGWIND] = "SIGWIND";
3105 # endif
3106 # ifdef SIGXCPU
3107 sys_siglist[SIGXCPU] = "CPU time limit exceeded";
3108 # endif
3109 # ifdef SIGXFSZ
3110 sys_siglist[SIGXFSZ] = "File size limit exceeded";
3111 # endif
3112 }
3113 #endif /* !defined HAVE_STRSIGNAL && !defined HAVE_DECL_SYS_SIGLIST */
3114 }
3115 \f
3116 #ifndef HAVE_RANDOM
3117 #ifdef random
3118 #define HAVE_RANDOM
3119 #endif
3120 #endif
3121
3122 /* Figure out how many bits the system's random number generator uses.
3123 `random' and `lrand48' are assumed to return 31 usable bits.
3124 BSD `rand' returns a 31 bit value but the low order bits are unusable;
3125 so we'll shift it and treat it like the 15-bit USG `rand'. */
3126
3127 #ifndef RAND_BITS
3128 # ifdef HAVE_RANDOM
3129 # define RAND_BITS 31
3130 # else /* !HAVE_RANDOM */
3131 # ifdef HAVE_LRAND48
3132 # define RAND_BITS 31
3133 # define random lrand48
3134 # else /* !HAVE_LRAND48 */
3135 # define RAND_BITS 15
3136 # if RAND_MAX == 32767
3137 # define random rand
3138 # else /* RAND_MAX != 32767 */
3139 # if RAND_MAX == 2147483647
3140 # define random() (rand () >> 16)
3141 # else /* RAND_MAX != 2147483647 */
3142 # ifdef USG
3143 # define random rand
3144 # else
3145 # define random() (rand () >> 16)
3146 # endif /* !USG */
3147 # endif /* RAND_MAX != 2147483647 */
3148 # endif /* RAND_MAX != 32767 */
3149 # endif /* !HAVE_LRAND48 */
3150 # endif /* !HAVE_RANDOM */
3151 #endif /* !RAND_BITS */
3152
3153 void
3154 seed_random (arg)
3155 long arg;
3156 {
3157 #ifdef HAVE_RANDOM
3158 srandom ((unsigned int)arg);
3159 #else
3160 # ifdef HAVE_LRAND48
3161 srand48 (arg);
3162 # else
3163 srand ((unsigned int)arg);
3164 # endif
3165 #endif
3166 }
3167
3168 /*
3169 * Build a full Emacs-sized word out of whatever we've got.
3170 * This suffices even for a 64-bit architecture with a 15-bit rand.
3171 */
3172 long
3173 get_random ()
3174 {
3175 long val = random ();
3176 #if VALBITS > RAND_BITS
3177 val = (val << RAND_BITS) ^ random ();
3178 #if VALBITS > 2*RAND_BITS
3179 val = (val << RAND_BITS) ^ random ();
3180 #if VALBITS > 3*RAND_BITS
3181 val = (val << RAND_BITS) ^ random ();
3182 #if VALBITS > 4*RAND_BITS
3183 val = (val << RAND_BITS) ^ random ();
3184 #endif /* need at least 5 */
3185 #endif /* need at least 4 */
3186 #endif /* need at least 3 */
3187 #endif /* need at least 2 */
3188 return val & ((1L << VALBITS) - 1);
3189 }
3190 \f
3191 #ifdef VMS
3192
3193 #ifdef getenv
3194 /* If any place else asks for the TERM variable,
3195 allow it to be overridden with the EMACS_TERM variable
3196 before attempting to translate the logical name TERM. As a last
3197 resort, ask for VAX C's special idea of the TERM variable. */
3198 #undef getenv
3199 char *
3200 sys_getenv (name)
3201 char *name;
3202 {
3203 register char *val;
3204 static char buf[256];
3205 static struct dsc$descriptor_s equiv
3206 = {sizeof (buf), DSC$K_DTYPE_T, DSC$K_CLASS_S, buf};
3207 static struct dsc$descriptor_s d_name
3208 = {0, DSC$K_DTYPE_T, DSC$K_CLASS_S, 0};
3209 short eqlen;
3210
3211 if (!strcmp (name, "TERM"))
3212 {
3213 val = (char *) getenv ("EMACS_TERM");
3214 if (val)
3215 return val;
3216 }
3217
3218 d_name.dsc$w_length = strlen (name);
3219 d_name.dsc$a_pointer = name;
3220 if (LIB$SYS_TRNLOG (&d_name, &eqlen, &equiv) == 1)
3221 {
3222 char *str = (char *) xmalloc (eqlen + 1);
3223 bcopy (buf, str, eqlen);
3224 str[eqlen] = '\0';
3225 /* This is a storage leak, but a pain to fix. With luck,
3226 no one will ever notice. */
3227 return str;
3228 }
3229 return (char *) getenv (name);
3230 }
3231 #endif /* getenv */
3232
3233 #ifdef abort
3234 /* Since VMS doesn't believe in core dumps, the only way to debug this beast is
3235 to force a call on the debugger from within the image. */
3236 #undef abort
3237 sys_abort ()
3238 {
3239 reset_all_sys_modes ();
3240 LIB$SIGNAL (SS$_DEBUG);
3241 }
3242 #endif /* abort */
3243 #endif /* VMS */
3244 \f
3245 #ifdef VMS
3246 #ifdef LINK_CRTL_SHARE
3247 #ifdef SHARABLE_LIB_BUG
3248 /* Variables declared noshare and initialized in sharable libraries
3249 cannot be shared. The VMS linker incorrectly forces you to use a private
3250 version which is uninitialized... If not for this "feature", we
3251 could use the C library definition of sys_nerr and sys_errlist. */
3252 int sys_nerr = 35;
3253 char *sys_errlist[] =
3254 {
3255 "error 0",
3256 "not owner",
3257 "no such file or directory",
3258 "no such process",
3259 "interrupted system call",
3260 "i/o error",
3261 "no such device or address",
3262 "argument list too long",
3263 "exec format error",
3264 "bad file number",
3265 "no child process",
3266 "no more processes",
3267 "not enough memory",
3268 "permission denied",
3269 "bad address",
3270 "block device required",
3271 "mount devices busy",
3272 "file exists",
3273 "cross-device link",
3274 "no such device",
3275 "not a directory",
3276 "is a directory",
3277 "invalid argument",
3278 "file table overflow",
3279 "too many open files",
3280 "not a typewriter",
3281 "text file busy",
3282 "file too big",
3283 "no space left on device",
3284 "illegal seek",
3285 "read-only file system",
3286 "too many links",
3287 "broken pipe",
3288 "math argument",
3289 "result too large",
3290 "I/O stream empty",
3291 "vax/vms specific error code nontranslatable error"
3292 };
3293 #endif /* SHARABLE_LIB_BUG */
3294 #endif /* LINK_CRTL_SHARE */
3295 #endif /* VMS */
3296
3297 #ifndef HAVE_STRERROR
3298 #ifndef WINDOWSNT
3299 char *
3300 strerror (errnum)
3301 int errnum;
3302 {
3303 extern char *sys_errlist[];
3304 extern int sys_nerr;
3305
3306 if (errnum >= 0 && errnum < sys_nerr)
3307 return sys_errlist[errnum];
3308 return (char *) "Unknown error";
3309 }
3310 #endif /* not WINDOWSNT */
3311 #endif /* ! HAVE_STRERROR */
3312 \f
3313 int
3314 emacs_open (path, oflag, mode)
3315 const char *path;
3316 int oflag, mode;
3317 {
3318 register int rtnval;
3319
3320 #ifdef BSD4_1
3321 if (oflag & O_CREAT)
3322 return creat (path, mode);
3323 #endif
3324
3325 while ((rtnval = open (path, oflag, mode)) == -1
3326 && (errno == EINTR))
3327 QUIT;
3328 return (rtnval);
3329 }
3330
3331 int
3332 emacs_close (fd)
3333 int fd;
3334 {
3335 int did_retry = 0;
3336 register int rtnval;
3337
3338 #if defined (MAC_OSX) && defined (HAVE_CARBON)
3339 {
3340 extern int mac_try_close_socket P_ ((int));
3341
3342 if (mac_try_close_socket (fd))
3343 return 0;
3344 }
3345 #endif
3346
3347 while ((rtnval = close (fd)) == -1
3348 && (errno == EINTR))
3349 did_retry = 1;
3350
3351 /* If close is interrupted SunOS 4.1 may or may not have closed the
3352 file descriptor. If it did the second close will fail with
3353 errno = EBADF. That means we have succeeded. */
3354 if (rtnval == -1 && did_retry && errno == EBADF)
3355 return 0;
3356
3357 return rtnval;
3358 }
3359
3360 int
3361 emacs_read (fildes, buf, nbyte)
3362 int fildes;
3363 char *buf;
3364 unsigned int nbyte;
3365 {
3366 register int rtnval;
3367
3368 while ((rtnval = read (fildes, buf, nbyte)) == -1
3369 && (errno == EINTR))
3370 QUIT;
3371 return (rtnval);
3372 }
3373
3374 int
3375 emacs_write (fildes, buf, nbyte)
3376 int fildes;
3377 const char *buf;
3378 unsigned int nbyte;
3379 {
3380 register int rtnval, bytes_written;
3381
3382 bytes_written = 0;
3383
3384 while (nbyte > 0)
3385 {
3386 rtnval = write (fildes, buf, nbyte);
3387
3388 if (rtnval == -1)
3389 {
3390 if (errno == EINTR)
3391 {
3392 #ifdef SYNC_INPUT
3393 /* I originally used `QUIT' but that might causes files to
3394 be truncated if you hit C-g in the middle of it. --Stef */
3395 if (interrupt_input_pending)
3396 handle_async_input ();
3397 if (pending_atimers)
3398 do_pending_atimers ();
3399 #endif
3400 continue;
3401 }
3402 else
3403 return (bytes_written ? bytes_written : -1);
3404 }
3405
3406 buf += rtnval;
3407 nbyte -= rtnval;
3408 bytes_written += rtnval;
3409 }
3410 return (bytes_written);
3411 }
3412 \f
3413 #ifdef USG
3414 /*
3415 * All of the following are for USG.
3416 *
3417 * On USG systems the system calls are INTERRUPTIBLE by signals
3418 * that the user program has elected to catch. Thus the system call
3419 * must be retried in these cases. To handle this without massive
3420 * changes in the source code, we remap the standard system call names
3421 * to names for our own functions in sysdep.c that do the system call
3422 * with retries. Actually, for portability reasons, it is good
3423 * programming practice, as this example shows, to limit all actual
3424 * system calls to a single occurrence in the source. Sure, this
3425 * adds an extra level of function call overhead but it is almost
3426 * always negligible. Fred Fish, Unisoft Systems Inc.
3427 */
3428
3429 /*
3430 * Warning, this function may not duplicate 4.2 action properly
3431 * under error conditions.
3432 */
3433
3434 #ifndef MAXPATHLEN
3435 /* In 4.1, param.h fails to define this. */
3436 #define MAXPATHLEN 1024
3437 #endif
3438
3439 #ifndef HAVE_GETWD
3440
3441 char *
3442 getwd (pathname)
3443 char *pathname;
3444 {
3445 char *npath, *spath;
3446 extern char *getcwd ();
3447
3448 BLOCK_INPUT; /* getcwd uses malloc */
3449 spath = npath = getcwd ((char *) 0, MAXPATHLEN);
3450 if (spath == 0)
3451 {
3452 UNBLOCK_INPUT;
3453 return spath;
3454 }
3455 /* On Altos 3068, getcwd can return @hostname/dir, so discard
3456 up to first slash. Should be harmless on other systems. */
3457 while (*npath && *npath != '/')
3458 npath++;
3459 strcpy (pathname, npath);
3460 free (spath); /* getcwd uses malloc */
3461 UNBLOCK_INPUT;
3462 return pathname;
3463 }
3464
3465 #endif /* HAVE_GETWD */
3466
3467 /*
3468 * Emulate rename using unlink/link. Note that this is
3469 * only partially correct. Also, doesn't enforce restriction
3470 * that files be of same type (regular->regular, dir->dir, etc).
3471 */
3472
3473 #ifndef HAVE_RENAME
3474
3475 rename (from, to)
3476 const char *from;
3477 const char *to;
3478 {
3479 if (access (from, 0) == 0)
3480 {
3481 unlink (to);
3482 if (link (from, to) == 0)
3483 if (unlink (from) == 0)
3484 return (0);
3485 }
3486 return (-1);
3487 }
3488
3489 #endif
3490
3491
3492 #ifdef HPUX
3493 #ifndef HAVE_PERROR
3494
3495 /* HPUX curses library references perror, but as far as we know
3496 it won't be called. Anyway this definition will do for now. */
3497
3498 perror ()
3499 {
3500 }
3501
3502 #endif /* not HAVE_PERROR */
3503 #endif /* HPUX */
3504
3505 #ifndef HAVE_DUP2
3506
3507 /*
3508 * Emulate BSD dup2. First close newd if it already exists.
3509 * Then, attempt to dup oldd. If not successful, call dup2 recursively
3510 * until we are, then close the unsuccessful ones.
3511 */
3512
3513 dup2 (oldd, newd)
3514 int oldd;
3515 int newd;
3516 {
3517 register int fd, ret;
3518
3519 emacs_close (newd);
3520
3521 #ifdef F_DUPFD
3522 return fcntl (oldd, F_DUPFD, newd);
3523 #else
3524 fd = dup (old);
3525 if (fd == -1)
3526 return -1;
3527 if (fd == new)
3528 return new;
3529 ret = dup2 (old,new);
3530 emacs_close (fd);
3531 return ret;
3532 #endif
3533 }
3534
3535 #endif /* not HAVE_DUP2 */
3536
3537 /*
3538 * Gettimeofday. Simulate as much as possible. Only accurate
3539 * to nearest second. Emacs doesn't use tzp so ignore it for now.
3540 * Only needed when subprocesses are defined.
3541 */
3542
3543 #ifdef subprocesses
3544 #ifndef VMS
3545 #ifndef HAVE_GETTIMEOFDAY
3546 #ifdef HAVE_TIMEVAL
3547
3548 /* ARGSUSED */
3549 int
3550 gettimeofday (tp, tzp)
3551 struct timeval *tp;
3552 struct timezone *tzp;
3553 {
3554 extern long time ();
3555
3556 tp->tv_sec = time ((long *)0);
3557 tp->tv_usec = 0;
3558 if (tzp != 0)
3559 tzp->tz_minuteswest = -1;
3560 return 0;
3561 }
3562
3563 #endif
3564 #endif
3565 #endif
3566 #endif /* subprocess && !HAVE_GETTIMEOFDAY && HAVE_TIMEVAL && !VMS */
3567
3568 /*
3569 * This function will go away as soon as all the stubs fixed. (fnf)
3570 */
3571
3572 void
3573 croak (badfunc)
3574 char *badfunc;
3575 {
3576 printf ("%s not yet implemented\r\n", badfunc);
3577 reset_all_sys_modes ();
3578 exit (1);
3579 }
3580
3581 #endif /* USG */
3582 \f
3583 /* Directory routines for systems that don't have them. */
3584
3585 #ifdef SYSV_SYSTEM_DIR
3586
3587 #include <dirent.h>
3588
3589 #if defined (BROKEN_CLOSEDIR) || !defined (HAVE_CLOSEDIR)
3590
3591 int
3592 closedir (dirp)
3593 register DIR *dirp; /* stream from opendir */
3594 {
3595 int rtnval;
3596
3597 rtnval = emacs_close (dirp->dd_fd);
3598
3599 /* Some systems (like Solaris) allocate the buffer and the DIR all
3600 in one block. Why in the world are we freeing this ourselves
3601 anyway? */
3602 #if ! (defined (sun) && defined (USG5_4))
3603 xfree ((char *) dirp->dd_buf); /* directory block defined in <dirent.h> */
3604 #endif
3605 xfree ((char *) dirp);
3606
3607 return rtnval;
3608 }
3609 #endif /* BROKEN_CLOSEDIR or not HAVE_CLOSEDIR */
3610 #endif /* SYSV_SYSTEM_DIR */
3611
3612 #ifdef NONSYSTEM_DIR_LIBRARY
3613
3614 DIR *
3615 opendir (filename)
3616 char *filename; /* name of directory */
3617 {
3618 register DIR *dirp; /* -> malloc'ed storage */
3619 register int fd; /* file descriptor for read */
3620 struct stat sbuf; /* result of fstat */
3621
3622 fd = emacs_open (filename, O_RDONLY, 0);
3623 if (fd < 0)
3624 return 0;
3625
3626 BLOCK_INPUT;
3627 if (fstat (fd, &sbuf) < 0
3628 || (sbuf.st_mode & S_IFMT) != S_IFDIR
3629 || (dirp = (DIR *) xmalloc (sizeof (DIR))) == 0)
3630 {
3631 emacs_close (fd);
3632 UNBLOCK_INPUT;
3633 return 0; /* bad luck today */
3634 }
3635 UNBLOCK_INPUT;
3636
3637 dirp->dd_fd = fd;
3638 dirp->dd_loc = dirp->dd_size = 0; /* refill needed */
3639
3640 return dirp;
3641 }
3642
3643 void
3644 closedir (dirp)
3645 register DIR *dirp; /* stream from opendir */
3646 {
3647 emacs_close (dirp->dd_fd);
3648 xfree ((char *) dirp);
3649 }
3650
3651
3652 #ifndef VMS
3653 #define DIRSIZ 14
3654 struct olddir
3655 {
3656 ino_t od_ino; /* inode */
3657 char od_name[DIRSIZ]; /* filename */
3658 };
3659 #endif /* not VMS */
3660
3661 struct direct dir_static; /* simulated directory contents */
3662
3663 /* ARGUSED */
3664 struct direct *
3665 readdir (dirp)
3666 register DIR *dirp; /* stream from opendir */
3667 {
3668 #ifndef VMS
3669 register struct olddir *dp; /* -> directory data */
3670 #else /* VMS */
3671 register struct dir$_name *dp; /* -> directory data */
3672 register struct dir$_version *dv; /* -> version data */
3673 #endif /* VMS */
3674
3675 for (; ;)
3676 {
3677 if (dirp->dd_loc >= dirp->dd_size)
3678 dirp->dd_loc = dirp->dd_size = 0;
3679
3680 if (dirp->dd_size == 0 /* refill buffer */
3681 && (dirp->dd_size = emacs_read (dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ)) <= 0)
3682 return 0;
3683
3684 #ifndef VMS
3685 dp = (struct olddir *) &dirp->dd_buf[dirp->dd_loc];
3686 dirp->dd_loc += sizeof (struct olddir);
3687
3688 if (dp->od_ino != 0) /* not deleted entry */
3689 {
3690 dir_static.d_ino = dp->od_ino;
3691 strncpy (dir_static.d_name, dp->od_name, DIRSIZ);
3692 dir_static.d_name[DIRSIZ] = '\0';
3693 dir_static.d_namlen = strlen (dir_static.d_name);
3694 dir_static.d_reclen = sizeof (struct direct)
3695 - MAXNAMLEN + 3
3696 + dir_static.d_namlen - dir_static.d_namlen % 4;
3697 return &dir_static; /* -> simulated structure */
3698 }
3699 #else /* VMS */
3700 dp = (struct dir$_name *) dirp->dd_buf;
3701 if (dirp->dd_loc == 0)
3702 dirp->dd_loc = (dp->dir$b_namecount&1) ? dp->dir$b_namecount + 1
3703 : dp->dir$b_namecount;
3704 dv = (struct dir$_version *)&dp->dir$t_name[dirp->dd_loc];
3705 dir_static.d_ino = dv->dir$w_fid_num;
3706 dir_static.d_namlen = dp->dir$b_namecount;
3707 dir_static.d_reclen = sizeof (struct direct)
3708 - MAXNAMLEN + 3
3709 + dir_static.d_namlen - dir_static.d_namlen % 4;
3710 strncpy (dir_static.d_name, dp->dir$t_name, dp->dir$b_namecount);
3711 dir_static.d_name[dir_static.d_namlen] = '\0';
3712 dirp->dd_loc = dirp->dd_size; /* only one record at a time */
3713 return &dir_static;
3714 #endif /* VMS */
3715 }
3716 }
3717
3718 #ifdef VMS
3719 /* readdirver is just like readdir except it returns all versions of a file
3720 as separate entries. */
3721
3722 /* ARGUSED */
3723 struct direct *
3724 readdirver (dirp)
3725 register DIR *dirp; /* stream from opendir */
3726 {
3727 register struct dir$_name *dp; /* -> directory data */
3728 register struct dir$_version *dv; /* -> version data */
3729
3730 if (dirp->dd_loc >= dirp->dd_size - sizeof (struct dir$_name))
3731 dirp->dd_loc = dirp->dd_size = 0;
3732
3733 if (dirp->dd_size == 0 /* refill buffer */
3734 && (dirp->dd_size = sys_read (dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ)) <= 0)
3735 return 0;
3736
3737 dp = (struct dir$_name *) dirp->dd_buf;
3738 if (dirp->dd_loc == 0)
3739 dirp->dd_loc = (dp->dir$b_namecount & 1) ? dp->dir$b_namecount + 1
3740 : dp->dir$b_namecount;
3741 dv = (struct dir$_version *) &dp->dir$t_name[dirp->dd_loc];
3742 strncpy (dir_static.d_name, dp->dir$t_name, dp->dir$b_namecount);
3743 sprintf (&dir_static.d_name[dp->dir$b_namecount], ";%d", dv->dir$w_version);
3744 dir_static.d_namlen = strlen (dir_static.d_name);
3745 dir_static.d_ino = dv->dir$w_fid_num;
3746 dir_static.d_reclen = sizeof (struct direct) - MAXNAMLEN + 3
3747 + dir_static.d_namlen - dir_static.d_namlen % 4;
3748 dirp->dd_loc = ((char *) (++dv) - dp->dir$t_name);
3749 return &dir_static;
3750 }
3751
3752 #endif /* VMS */
3753
3754 #endif /* NONSYSTEM_DIR_LIBRARY */
3755
3756 \f
3757 int
3758 set_file_times (filename, atime, mtime)
3759 const char *filename;
3760 EMACS_TIME atime, mtime;
3761 {
3762 #ifdef HAVE_UTIMES
3763 struct timeval tv[2];
3764 tv[0] = atime;
3765 tv[1] = mtime;
3766 return utimes (filename, tv);
3767 #else /* not HAVE_UTIMES */
3768 struct utimbuf utb;
3769 utb.actime = EMACS_SECS (atime);
3770 utb.modtime = EMACS_SECS (mtime);
3771 return utime (filename, &utb);
3772 #endif /* not HAVE_UTIMES */
3773 }
3774 \f
3775 /* mkdir and rmdir functions, for systems which don't have them. */
3776
3777 #ifndef HAVE_MKDIR
3778 /*
3779 * Written by Robert Rother, Mariah Corporation, August 1985.
3780 *
3781 * If you want it, it's yours. All I ask in return is that if you
3782 * figure out how to do this in a Bourne Shell script you send me
3783 * a copy.
3784 * sdcsvax!rmr or rmr@uscd
3785 *
3786 * Severely hacked over by John Gilmore to make a 4.2BSD compatible
3787 * subroutine. 11Mar86; hoptoad!gnu
3788 *
3789 * Modified by rmtodd@uokmax 6-28-87 -- when making an already existing dir,
3790 * subroutine didn't return EEXIST. It does now.
3791 */
3792
3793 /*
3794 * Make a directory.
3795 */
3796 #ifdef MKDIR_PROTOTYPE
3797 MKDIR_PROTOTYPE
3798 #else
3799 int
3800 mkdir (dpath, dmode)
3801 char *dpath;
3802 int dmode;
3803 #endif
3804 {
3805 int cpid, status, fd;
3806 struct stat statbuf;
3807
3808 if (stat (dpath, &statbuf) == 0)
3809 {
3810 errno = EEXIST; /* Stat worked, so it already exists */
3811 return -1;
3812 }
3813
3814 /* If stat fails for a reason other than non-existence, return error */
3815 if (errno != ENOENT)
3816 return -1;
3817
3818 synch_process_alive = 1;
3819 switch (cpid = fork ())
3820 {
3821
3822 case -1: /* Error in fork */
3823 return (-1); /* Errno is set already */
3824
3825 case 0: /* Child process */
3826 /*
3827 * Cheap hack to set mode of new directory. Since this
3828 * child process is going away anyway, we zap its umask.
3829 * FIXME, this won't suffice to set SUID, SGID, etc. on this
3830 * directory. Does anybody care?
3831 */
3832 status = umask (0); /* Get current umask */
3833 status = umask (status | (0777 & ~dmode)); /* Set for mkdir */
3834 fd = emacs_open ("/dev/null", O_RDWR, 0);
3835 if (fd >= 0)
3836 {
3837 dup2 (fd, 0);
3838 dup2 (fd, 1);
3839 dup2 (fd, 2);
3840 }
3841 execl ("/bin/mkdir", "mkdir", dpath, (char *) 0);
3842 _exit (-1); /* Can't exec /bin/mkdir */
3843
3844 default: /* Parent process */
3845 wait_for_termination (cpid);
3846 }
3847
3848 if (synch_process_death != 0 || synch_process_retcode != 0
3849 || synch_process_termsig != 0)
3850 {
3851 errno = EIO; /* We don't know why, but */
3852 return -1; /* /bin/mkdir failed */
3853 }
3854
3855 return 0;
3856 }
3857 #endif /* not HAVE_MKDIR */
3858
3859 #ifndef HAVE_RMDIR
3860 int
3861 rmdir (dpath)
3862 char *dpath;
3863 {
3864 int cpid, status, fd;
3865 struct stat statbuf;
3866
3867 if (stat (dpath, &statbuf) != 0)
3868 {
3869 /* Stat just set errno. We don't have to */
3870 return -1;
3871 }
3872
3873 synch_process_alive = 1;
3874 switch (cpid = fork ())
3875 {
3876
3877 case -1: /* Error in fork */
3878 return (-1); /* Errno is set already */
3879
3880 case 0: /* Child process */
3881 fd = emacs_open ("/dev/null", O_RDWR, 0);
3882 if (fd >= 0)
3883 {
3884 dup2 (fd, 0);
3885 dup2 (fd, 1);
3886 dup2 (fd, 2);
3887 }
3888 execl ("/bin/rmdir", "rmdir", dpath, (char *) 0);
3889 _exit (-1); /* Can't exec /bin/rmdir */
3890
3891 default: /* Parent process */
3892 wait_for_termination (cpid);
3893 }
3894
3895 if (synch_process_death != 0 || synch_process_retcode != 0
3896 || synch_process_termsig != 0)
3897 {
3898 errno = EIO; /* We don't know why, but */
3899 return -1; /* /bin/rmdir failed */
3900 }
3901
3902 return 0;
3903 }
3904 #endif /* !HAVE_RMDIR */
3905
3906
3907 \f
3908 /* Functions for VMS */
3909 #ifdef VMS
3910 #include <acldef.h>
3911 #include <chpdef.h>
3912 #include <jpidef.h>
3913
3914 /* Return as a string the VMS error string pertaining to STATUS.
3915 Reuses the same static buffer each time it is called. */
3916
3917 char *
3918 vmserrstr (status)
3919 int status; /* VMS status code */
3920 {
3921 int bufadr[2];
3922 short len;
3923 static char buf[257];
3924
3925 bufadr[0] = sizeof buf - 1;
3926 bufadr[1] = (int) buf;
3927 if (! (SYS$GETMSG (status, &len, bufadr, 0x1, 0) & 1))
3928 return "untranslatable VMS error status";
3929 buf[len] = '\0';
3930 return buf;
3931 }
3932
3933 #ifdef access
3934 #undef access
3935
3936 /* The following is necessary because 'access' emulation by VMS C (2.0) does
3937 * not work correctly. (It also doesn't work well in version 2.3.)
3938 */
3939
3940 #ifdef VMS4_4
3941
3942 #define DESCRIPTOR(name,string) struct dsc$descriptor_s name = \
3943 { strlen (string), DSC$K_DTYPE_T, DSC$K_CLASS_S, string }
3944
3945 typedef union {
3946 struct {
3947 unsigned short s_buflen;
3948 unsigned short s_code;
3949 char *s_bufadr;
3950 unsigned short *s_retlenadr;
3951 } s;
3952 int end;
3953 } item;
3954 #define buflen s.s_buflen
3955 #define code s.s_code
3956 #define bufadr s.s_bufadr
3957 #define retlenadr s.s_retlenadr
3958
3959 #define R_OK 4 /* test for read permission */
3960 #define W_OK 2 /* test for write permission */
3961 #define X_OK 1 /* test for execute (search) permission */
3962 #define F_OK 0 /* test for presence of file */
3963
3964 int
3965 sys_access (path, mode)
3966 char *path;
3967 int mode;
3968 {
3969 static char *user = NULL;
3970 char dir_fn[512];
3971
3972 /* translate possible directory spec into .DIR file name, so brain-dead
3973 * access can treat the directory like a file. */
3974 if (directory_file_name (path, dir_fn))
3975 path = dir_fn;
3976
3977 if (mode == F_OK)
3978 return access (path, mode);
3979 if (user == NULL && (user = (char *) getenv ("USER")) == NULL)
3980 return -1;
3981 {
3982 int stat;
3983 int flags;
3984 int acces;
3985 unsigned short int dummy;
3986 item itemlst[3];
3987 static int constant = ACL$C_FILE;
3988 DESCRIPTOR (path_desc, path);
3989 DESCRIPTOR (user_desc, user);
3990
3991 flags = 0;
3992 acces = 0;
3993 if ((mode & X_OK) && ((stat = access (path, mode)) < 0 || mode == X_OK))
3994 return stat;
3995 if (mode & R_OK)
3996 acces |= CHP$M_READ;
3997 if (mode & W_OK)
3998 acces |= CHP$M_WRITE;
3999 itemlst[0].buflen = sizeof (int);
4000 itemlst[0].code = CHP$_FLAGS;
4001 itemlst[0].bufadr = (char *) &flags;
4002 itemlst[0].retlenadr = &dummy;
4003 itemlst[1].buflen = sizeof (int);
4004 itemlst[1].code = CHP$_ACCESS;
4005 itemlst[1].bufadr = (char *) &acces;
4006 itemlst[1].retlenadr = &dummy;
4007 itemlst[2].end = CHP$_END;
4008 stat = SYS$CHECK_ACCESS (&constant, &path_desc, &user_desc, itemlst);
4009 return stat == SS$_NORMAL ? 0 : -1;
4010 }
4011 }
4012
4013 #else /* not VMS4_4 */
4014
4015 #include <prvdef.h>
4016 #define ACE$M_WRITE 2
4017 #define ACE$C_KEYID 1
4018
4019 static unsigned short memid, grpid;
4020 static unsigned int uic;
4021
4022 /* Called from init_sys_modes, so it happens not very often
4023 but at least each time Emacs is loaded. */
4024 void
4025 sys_access_reinit ()
4026 {
4027 uic = 0;
4028 }
4029
4030 int
4031 sys_access (filename, type)
4032 char * filename;
4033 int type;
4034 {
4035 struct FAB fab;
4036 struct XABPRO xab;
4037 int status, size, i, typecode, acl_controlled;
4038 unsigned int *aclptr, *aclend, aclbuf[60];
4039 union prvdef prvmask;
4040
4041 /* Get UIC and GRP values for protection checking. */
4042 if (uic == 0)
4043 {
4044 status = LIB$GETJPI (&JPI$_UIC, 0, 0, &uic, 0, 0);
4045 if (! (status & 1))
4046 return -1;
4047 memid = uic & 0xFFFF;
4048 grpid = uic >> 16;
4049 }
4050
4051 if (type != 2) /* not checking write access */
4052 return access (filename, type);
4053
4054 /* Check write protection. */
4055
4056 #define CHECKPRIV(bit) (prvmask.bit)
4057 #define WRITABLE(field) (! ((xab.xab$w_pro >> field) & XAB$M_NOWRITE))
4058
4059 /* Find privilege bits */
4060 status = SYS$SETPRV (0, 0, 0, prvmask);
4061 if (! (status & 1))
4062 error ("Unable to find privileges: %s", vmserrstr (status));
4063 if (CHECKPRIV (PRV$V_BYPASS))
4064 return 0; /* BYPASS enabled */
4065 fab = cc$rms_fab;
4066 fab.fab$b_fac = FAB$M_GET;
4067 fab.fab$l_fna = filename;
4068 fab.fab$b_fns = strlen (filename);
4069 fab.fab$l_xab = &xab;
4070 xab = cc$rms_xabpro;
4071 xab.xab$l_aclbuf = aclbuf;
4072 xab.xab$w_aclsiz = sizeof (aclbuf);
4073 status = SYS$OPEN (&fab, 0, 0);
4074 if (! (status & 1))
4075 return -1;
4076 SYS$CLOSE (&fab, 0, 0);
4077 /* Check system access */
4078 if (CHECKPRIV (PRV$V_SYSPRV) && WRITABLE (XAB$V_SYS))
4079 return 0;
4080 /* Check ACL entries, if any */
4081 acl_controlled = 0;
4082 if (xab.xab$w_acllen > 0)
4083 {
4084 aclptr = aclbuf;
4085 aclend = &aclbuf[xab.xab$w_acllen / 4];
4086 while (*aclptr && aclptr < aclend)
4087 {
4088 size = (*aclptr & 0xff) / 4;
4089 typecode = (*aclptr >> 8) & 0xff;
4090 if (typecode == ACE$C_KEYID)
4091 for (i = size - 1; i > 1; i--)
4092 if (aclptr[i] == uic)
4093 {
4094 acl_controlled = 1;
4095 if (aclptr[1] & ACE$M_WRITE)
4096 return 0; /* Write access through ACL */
4097 }
4098 aclptr = &aclptr[size];
4099 }
4100 if (acl_controlled) /* ACL specified, prohibits write access */
4101 return -1;
4102 }
4103 /* No ACL entries specified, check normal protection */
4104 if (WRITABLE (XAB$V_WLD)) /* World writable */
4105 return 0;
4106 if (WRITABLE (XAB$V_GRP) &&
4107 (unsigned short) (xab.xab$l_uic >> 16) == grpid)
4108 return 0; /* Group writable */
4109 if (WRITABLE (XAB$V_OWN) &&
4110 (xab.xab$l_uic & 0xFFFF) == memid)
4111 return 0; /* Owner writable */
4112
4113 return -1; /* Not writable */
4114 }
4115 #endif /* not VMS4_4 */
4116 #endif /* access */
4117
4118 static char vtbuf[NAM$C_MAXRSS+1];
4119
4120 /* translate a vms file spec to a unix path */
4121 char *
4122 sys_translate_vms (vfile)
4123 char * vfile;
4124 {
4125 char * p;
4126 char * targ;
4127
4128 if (!vfile)
4129 return 0;
4130
4131 targ = vtbuf;
4132
4133 /* leading device or logical name is a root directory */
4134 if (p = strchr (vfile, ':'))
4135 {
4136 *targ++ = '/';
4137 while (vfile < p)
4138 *targ++ = *vfile++;
4139 vfile++;
4140 *targ++ = '/';
4141 }
4142 p = vfile;
4143 if (*p == '[' || *p == '<')
4144 {
4145 while (*++vfile != *p + 2)
4146 switch (*vfile)
4147 {
4148 case '.':
4149 if (vfile[-1] == *p)
4150 *targ++ = '.';
4151 *targ++ = '/';
4152 break;
4153
4154 case '-':
4155 *targ++ = '.';
4156 *targ++ = '.';
4157 break;
4158
4159 default:
4160 *targ++ = *vfile;
4161 break;
4162 }
4163 vfile++;
4164 *targ++ = '/';
4165 }
4166 while (*vfile)
4167 *targ++ = *vfile++;
4168
4169 return vtbuf;
4170 }
4171
4172 static char utbuf[NAM$C_MAXRSS+1];
4173
4174 /* translate a unix path to a VMS file spec */
4175 char *
4176 sys_translate_unix (ufile)
4177 char * ufile;
4178 {
4179 int slash_seen = 0;
4180 char *p;
4181 char * targ;
4182
4183 if (!ufile)
4184 return 0;
4185
4186 targ = utbuf;
4187
4188 if (*ufile == '/')
4189 {
4190 ufile++;
4191 }
4192
4193 while (*ufile)
4194 {
4195 switch (*ufile)
4196 {
4197 case '/':
4198 if (slash_seen)
4199 if (index (&ufile[1], '/'))
4200 *targ++ = '.';
4201 else
4202 *targ++ = ']';
4203 else
4204 {
4205 *targ++ = ':';
4206 if (index (&ufile[1], '/'))
4207 *targ++ = '[';
4208 slash_seen = 1;
4209 }
4210 break;
4211
4212 case '.':
4213 if (strncmp (ufile, "./", 2) == 0)
4214 {
4215 if (!slash_seen)
4216 {
4217 *targ++ = '[';
4218 slash_seen = 1;
4219 }
4220 ufile++; /* skip the dot */
4221 if (index (&ufile[1], '/'))
4222 *targ++ = '.';
4223 else
4224 *targ++ = ']';
4225 }
4226 else if (strncmp (ufile, "../", 3) == 0)
4227 {
4228 if (!slash_seen)
4229 {
4230 *targ++ = '[';
4231 slash_seen = 1;
4232 }
4233 *targ++ = '-';
4234 ufile += 2; /* skip the dots */
4235 if (index (&ufile[1], '/'))
4236 *targ++ = '.';
4237 else
4238 *targ++ = ']';
4239 }
4240 else
4241 *targ++ = *ufile;
4242 break;
4243
4244 default:
4245 *targ++ = *ufile;
4246 break;
4247 }
4248 ufile++;
4249 }
4250 *targ = '\0';
4251
4252 return utbuf;
4253 }
4254
4255 char *
4256 getwd (pathname)
4257 char *pathname;
4258 {
4259 char *ptr, *val;
4260 extern char *getcwd ();
4261
4262 #define MAXPATHLEN 1024
4263
4264 ptr = xmalloc (MAXPATHLEN);
4265 val = getcwd (ptr, MAXPATHLEN);
4266 if (val == 0)
4267 {
4268 xfree (ptr);
4269 return val;
4270 }
4271 strcpy (pathname, ptr);
4272 xfree (ptr);
4273
4274 return pathname;
4275 }
4276
4277 int
4278 getppid ()
4279 {
4280 long item_code = JPI$_OWNER;
4281 unsigned long parent_id;
4282 int status;
4283
4284 if (((status = LIB$GETJPI (&item_code, 0, 0, &parent_id)) & 1) == 0)
4285 {
4286 errno = EVMSERR;
4287 vaxc$errno = status;
4288 return -1;
4289 }
4290 return parent_id;
4291 }
4292
4293 #undef getuid
4294 unsigned
4295 sys_getuid ()
4296 {
4297 return (getgid () << 16) | getuid ();
4298 }
4299
4300 #undef read
4301 int
4302 sys_read (fildes, buf, nbyte)
4303 int fildes;
4304 char *buf;
4305 unsigned int nbyte;
4306 {
4307 return read (fildes, buf, (nbyte < MAXIOSIZE ? nbyte : MAXIOSIZE));
4308 }
4309
4310 #if 0
4311 int
4312 sys_write (fildes, buf, nbyte)
4313 int fildes;
4314 char *buf;
4315 unsigned int nbyte;
4316 {
4317 register int nwrote, rtnval = 0;
4318
4319 while (nbyte > MAXIOSIZE && (nwrote = write (fildes, buf, MAXIOSIZE)) > 0) {
4320 nbyte -= nwrote;
4321 buf += nwrote;
4322 rtnval += nwrote;
4323 }
4324 if (nwrote < 0)
4325 return rtnval ? rtnval : -1;
4326 if ((nwrote = write (fildes, buf, nbyte)) < 0)
4327 return rtnval ? rtnval : -1;
4328 return (rtnval + nwrote);
4329 }
4330 #endif /* 0 */
4331
4332 /*
4333 * VAX/VMS VAX C RTL really loses. It insists that records
4334 * end with a newline (carriage return) character, and if they
4335 * don't it adds one (nice of it isn't it!)
4336 *
4337 * Thus we do this stupidity below.
4338 */
4339
4340 #undef write
4341 int
4342 sys_write (fildes, buf, nbytes)
4343 int fildes;
4344 char *buf;
4345 unsigned int nbytes;
4346 {
4347 register char *p;
4348 register char *e;
4349 int sum = 0;
4350 struct stat st;
4351
4352 fstat (fildes, &st);
4353 p = buf;
4354 while (nbytes > 0)
4355 {
4356 int len, retval;
4357
4358 /* Handle fixed-length files with carriage control. */
4359 if (st.st_fab_rfm == FAB$C_FIX
4360 && ((st.st_fab_rat & (FAB$M_FTN | FAB$M_CR)) != 0))
4361 {
4362 len = st.st_fab_mrs;
4363 retval = write (fildes, p, min (len, nbytes));
4364 if (retval != len)
4365 return -1;
4366 retval++; /* This skips the implied carriage control */
4367 }
4368 else
4369 {
4370 e = p + min (MAXIOSIZE, nbytes) - 1;
4371 while (*e != '\n' && e > p) e--;
4372 if (p == e) /* Ok.. so here we add a newline... sigh. */
4373 e = p + min (MAXIOSIZE, nbytes) - 1;
4374 len = e + 1 - p;
4375 retval = write (fildes, p, len);
4376 if (retval != len)
4377 return -1;
4378 }
4379 p += retval;
4380 sum += retval;
4381 nbytes -= retval;
4382 }
4383 return sum;
4384 }
4385
4386 /* Create file NEW copying its attributes from file OLD. If
4387 OLD is 0 or does not exist, create based on the value of
4388 vms_stmlf_recfm. */
4389
4390 /* Protection value the file should ultimately have.
4391 Set by create_copy_attrs, and use by rename_sansversions. */
4392 static unsigned short int fab_final_pro;
4393
4394 int
4395 creat_copy_attrs (old, new)
4396 char *old, *new;
4397 {
4398 struct FAB fab = cc$rms_fab;
4399 struct XABPRO xabpro;
4400 char aclbuf[256]; /* Choice of size is arbitrary. See below. */
4401 extern int vms_stmlf_recfm;
4402
4403 if (old)
4404 {
4405 fab.fab$b_fac = FAB$M_GET;
4406 fab.fab$l_fna = old;
4407 fab.fab$b_fns = strlen (old);
4408 fab.fab$l_xab = (char *) &xabpro;
4409 xabpro = cc$rms_xabpro;
4410 xabpro.xab$l_aclbuf = aclbuf;
4411 xabpro.xab$w_aclsiz = sizeof aclbuf;
4412 /* Call $OPEN to fill in the fab & xabpro fields. */
4413 if (SYS$OPEN (&fab, 0, 0) & 1)
4414 {
4415 SYS$CLOSE (&fab, 0, 0);
4416 fab.fab$l_alq = 0; /* zero the allocation quantity */
4417 if (xabpro.xab$w_acllen > 0)
4418 {
4419 if (xabpro.xab$w_acllen > sizeof aclbuf)
4420 /* If the acl buffer was too short, redo open with longer one.
4421 Wouldn't need to do this if there were some system imposed
4422 limit on the size of an ACL, but I can't find any such. */
4423 {
4424 xabpro.xab$l_aclbuf = (char *) alloca (xabpro.xab$w_acllen);
4425 xabpro.xab$w_aclsiz = xabpro.xab$w_acllen;
4426 if (SYS$OPEN (&fab, 0, 0) & 1)
4427 SYS$CLOSE (&fab, 0, 0);
4428 else
4429 old = 0;
4430 }
4431 }
4432 else
4433 xabpro.xab$l_aclbuf = 0;
4434 }
4435 else
4436 old = 0;
4437 }
4438 fab.fab$l_fna = new;
4439 fab.fab$b_fns = strlen (new);
4440 if (!old)
4441 {
4442 fab.fab$l_xab = 0;
4443 fab.fab$b_rfm = vms_stmlf_recfm ? FAB$C_STMLF : FAB$C_VAR;
4444 fab.fab$b_rat = FAB$M_CR;
4445 }
4446
4447 /* Set the file protections such that we will be able to manipulate
4448 this file. Once we are done writing and renaming it, we will set
4449 the protections back. */
4450 if (old)
4451 fab_final_pro = xabpro.xab$w_pro;
4452 else
4453 SYS$SETDFPROT (0, &fab_final_pro);
4454 xabpro.xab$w_pro &= 0xff0f; /* set O:rewd for now. This is set back later. */
4455
4456 /* Create the new file with either default attrs or attrs copied
4457 from old file. */
4458 if (!(SYS$CREATE (&fab, 0, 0) & 1))
4459 return -1;
4460 SYS$CLOSE (&fab, 0, 0);
4461 /* As this is a "replacement" for creat, return a file descriptor
4462 opened for writing. */
4463 return open (new, O_WRONLY);
4464 }
4465
4466 #ifdef creat
4467 #undef creat
4468 #include <varargs.h>
4469 #ifdef __GNUC__
4470 #ifndef va_count
4471 #define va_count(X) ((X) = *(((int *) &(va_alist)) - 1))
4472 #endif
4473 #endif
4474
4475 int
4476 sys_creat (va_alist)
4477 va_dcl
4478 {
4479 va_list list_incrementer;
4480 char *name;
4481 int mode;
4482 int rfd; /* related file descriptor */
4483 int fd; /* Our new file descriptor */
4484 int count;
4485 struct stat st_buf;
4486 char rfm[12];
4487 char rat[15];
4488 char mrs[13];
4489 char fsz[13];
4490 extern int vms_stmlf_recfm;
4491
4492 va_count (count);
4493 va_start (list_incrementer);
4494 name = va_arg (list_incrementer, char *);
4495 mode = va_arg (list_incrementer, int);
4496 if (count > 2)
4497 rfd = va_arg (list_incrementer, int);
4498 va_end (list_incrementer);
4499 if (count > 2)
4500 {
4501 /* Use information from the related file descriptor to set record
4502 format of the newly created file. */
4503 fstat (rfd, &st_buf);
4504 switch (st_buf.st_fab_rfm)
4505 {
4506 case FAB$C_FIX:
4507 strcpy (rfm, "rfm = fix");
4508 sprintf (mrs, "mrs = %d", st_buf.st_fab_mrs);
4509 strcpy (rat, "rat = ");
4510 if (st_buf.st_fab_rat & FAB$M_CR)
4511 strcat (rat, "cr");
4512 else if (st_buf.st_fab_rat & FAB$M_FTN)
4513 strcat (rat, "ftn");
4514 else if (st_buf.st_fab_rat & FAB$M_PRN)
4515 strcat (rat, "prn");
4516 if (st_buf.st_fab_rat & FAB$M_BLK)
4517 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4518 strcat (rat, ", blk");
4519 else
4520 strcat (rat, "blk");
4521 return creat (name, 0, rfm, rat, mrs);
4522
4523 case FAB$C_VFC:
4524 strcpy (rfm, "rfm = vfc");
4525 sprintf (fsz, "fsz = %d", st_buf.st_fab_fsz);
4526 strcpy (rat, "rat = ");
4527 if (st_buf.st_fab_rat & FAB$M_CR)
4528 strcat (rat, "cr");
4529 else if (st_buf.st_fab_rat & FAB$M_FTN)
4530 strcat (rat, "ftn");
4531 else if (st_buf.st_fab_rat & FAB$M_PRN)
4532 strcat (rat, "prn");
4533 if (st_buf.st_fab_rat & FAB$M_BLK)
4534 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4535 strcat (rat, ", blk");
4536 else
4537 strcat (rat, "blk");
4538 return creat (name, 0, rfm, rat, fsz);
4539
4540 case FAB$C_STM:
4541 strcpy (rfm, "rfm = stm");
4542 break;
4543
4544 case FAB$C_STMCR:
4545 strcpy (rfm, "rfm = stmcr");
4546 break;
4547
4548 case FAB$C_STMLF:
4549 strcpy (rfm, "rfm = stmlf");
4550 break;
4551
4552 case FAB$C_UDF:
4553 strcpy (rfm, "rfm = udf");
4554 break;
4555
4556 case FAB$C_VAR:
4557 strcpy (rfm, "rfm = var");
4558 break;
4559 }
4560 strcpy (rat, "rat = ");
4561 if (st_buf.st_fab_rat & FAB$M_CR)
4562 strcat (rat, "cr");
4563 else if (st_buf.st_fab_rat & FAB$M_FTN)
4564 strcat (rat, "ftn");
4565 else if (st_buf.st_fab_rat & FAB$M_PRN)
4566 strcat (rat, "prn");
4567 if (st_buf.st_fab_rat & FAB$M_BLK)
4568 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4569 strcat (rat, ", blk");
4570 else
4571 strcat (rat, "blk");
4572 }
4573 else
4574 {
4575 strcpy (rfm, vms_stmlf_recfm ? "rfm = stmlf" : "rfm=var");
4576 strcpy (rat, "rat=cr");
4577 }
4578 /* Until the VAX C RTL fixes the many bugs with modes, always use
4579 mode 0 to get the user's default protection. */
4580 fd = creat (name, 0, rfm, rat);
4581 if (fd < 0 && errno == EEXIST)
4582 {
4583 if (unlink (name) < 0)
4584 report_file_error ("delete", build_string (name));
4585 fd = creat (name, 0, rfm, rat);
4586 }
4587 return fd;
4588 }
4589 #endif /* creat */
4590
4591 /* fwrite to stdout is S L O W. Speed it up by using fputc...*/
4592 int
4593 sys_fwrite (ptr, size, num, fp)
4594 register char * ptr;
4595 FILE * fp;
4596 {
4597 register int tot = num * size;
4598
4599 while (tot--)
4600 fputc (*ptr++, fp);
4601 return num;
4602 }
4603
4604 /*
4605 * The VMS C library routine creat actually creates a new version of an
4606 * existing file rather than truncating the old version. There are times
4607 * when this is not the desired behavior, for instance, when writing an
4608 * auto save file (you only want one version), or when you don't have
4609 * write permission in the directory containing the file (but the file
4610 * itself is writable). Hence this routine, which is equivalent to
4611 * "close (creat (fn, 0));" on Unix if fn already exists.
4612 */
4613 int
4614 vms_truncate (fn)
4615 char *fn;
4616 {
4617 struct FAB xfab = cc$rms_fab;
4618 struct RAB xrab = cc$rms_rab;
4619 int status;
4620
4621 xfab.fab$l_fop = FAB$M_TEF; /* free allocated but unused blocks on close */
4622 xfab.fab$b_fac = FAB$M_TRN | FAB$M_GET; /* allow truncate and get access */
4623 xfab.fab$b_shr = FAB$M_NIL; /* allow no sharing - file must be locked */
4624 xfab.fab$l_fna = fn;
4625 xfab.fab$b_fns = strlen (fn);
4626 xfab.fab$l_dna = ";0"; /* default to latest version of the file */
4627 xfab.fab$b_dns = 2;
4628 xrab.rab$l_fab = &xfab;
4629
4630 /* This gibberish opens the file, positions to the first record, and
4631 deletes all records from there until the end of file. */
4632 if ((SYS$OPEN (&xfab) & 01) == 01)
4633 {
4634 if ((SYS$CONNECT (&xrab) & 01) == 01 &&
4635 (SYS$FIND (&xrab) & 01) == 01 &&
4636 (SYS$TRUNCATE (&xrab) & 01) == 01)
4637 status = 0;
4638 else
4639 status = -1;
4640 }
4641 else
4642 status = -1;
4643 SYS$CLOSE (&xfab);
4644 return status;
4645 }
4646
4647 /* Define this symbol to actually read SYSUAF.DAT. This requires either
4648 SYSPRV or a readable SYSUAF.DAT. */
4649
4650 #ifdef READ_SYSUAF
4651 /*
4652 * getuaf.c
4653 *
4654 * Routine to read the VMS User Authorization File and return
4655 * a specific user's record.
4656 */
4657
4658 static struct UAF retuaf;
4659
4660 struct UAF *
4661 get_uaf_name (uname)
4662 char * uname;
4663 {
4664 register status;
4665 struct FAB uaf_fab;
4666 struct RAB uaf_rab;
4667
4668 uaf_fab = cc$rms_fab;
4669 uaf_rab = cc$rms_rab;
4670 /* initialize fab fields */
4671 uaf_fab.fab$l_fna = "SYS$SYSTEM:SYSUAF.DAT";
4672 uaf_fab.fab$b_fns = 21;
4673 uaf_fab.fab$b_fac = FAB$M_GET;
4674 uaf_fab.fab$b_org = FAB$C_IDX;
4675 uaf_fab.fab$b_shr = FAB$M_GET|FAB$M_PUT|FAB$M_UPD|FAB$M_DEL;
4676 /* initialize rab fields */
4677 uaf_rab.rab$l_fab = &uaf_fab;
4678 /* open the User Authorization File */
4679 status = SYS$OPEN (&uaf_fab);
4680 if (!(status&1))
4681 {
4682 errno = EVMSERR;
4683 vaxc$errno = status;
4684 return 0;
4685 }
4686 status = SYS$CONNECT (&uaf_rab);
4687 if (!(status&1))
4688 {
4689 errno = EVMSERR;
4690 vaxc$errno = status;
4691 return 0;
4692 }
4693 /* read the requested record - index is in uname */
4694 uaf_rab.rab$l_kbf = uname;
4695 uaf_rab.rab$b_ksz = strlen (uname);
4696 uaf_rab.rab$b_rac = RAB$C_KEY;
4697 uaf_rab.rab$l_ubf = (char *)&retuaf;
4698 uaf_rab.rab$w_usz = sizeof retuaf;
4699 status = SYS$GET (&uaf_rab);
4700 if (!(status&1))
4701 {
4702 errno = EVMSERR;
4703 vaxc$errno = status;
4704 return 0;
4705 }
4706 /* close the User Authorization File */
4707 status = SYS$DISCONNECT (&uaf_rab);
4708 if (!(status&1))
4709 {
4710 errno = EVMSERR;
4711 vaxc$errno = status;
4712 return 0;
4713 }
4714 status = SYS$CLOSE (&uaf_fab);
4715 if (!(status&1))
4716 {
4717 errno = EVMSERR;
4718 vaxc$errno = status;
4719 return 0;
4720 }
4721 return &retuaf;
4722 }
4723
4724 struct UAF *
4725 get_uaf_uic (uic)
4726 unsigned long uic;
4727 {
4728 register status;
4729 struct FAB uaf_fab;
4730 struct RAB uaf_rab;
4731
4732 uaf_fab = cc$rms_fab;
4733 uaf_rab = cc$rms_rab;
4734 /* initialize fab fields */
4735 uaf_fab.fab$l_fna = "SYS$SYSTEM:SYSUAF.DAT";
4736 uaf_fab.fab$b_fns = 21;
4737 uaf_fab.fab$b_fac = FAB$M_GET;
4738 uaf_fab.fab$b_org = FAB$C_IDX;
4739 uaf_fab.fab$b_shr = FAB$M_GET|FAB$M_PUT|FAB$M_UPD|FAB$M_DEL;
4740 /* initialize rab fields */
4741 uaf_rab.rab$l_fab = &uaf_fab;
4742 /* open the User Authorization File */
4743 status = SYS$OPEN (&uaf_fab);
4744 if (!(status&1))
4745 {
4746 errno = EVMSERR;
4747 vaxc$errno = status;
4748 return 0;
4749 }
4750 status = SYS$CONNECT (&uaf_rab);
4751 if (!(status&1))
4752 {
4753 errno = EVMSERR;
4754 vaxc$errno = status;
4755 return 0;
4756 }
4757 /* read the requested record - index is in uic */
4758 uaf_rab.rab$b_krf = 1; /* 1st alternate key */
4759 uaf_rab.rab$l_kbf = (char *) &uic;
4760 uaf_rab.rab$b_ksz = sizeof uic;
4761 uaf_rab.rab$b_rac = RAB$C_KEY;
4762 uaf_rab.rab$l_ubf = (char *)&retuaf;
4763 uaf_rab.rab$w_usz = sizeof retuaf;
4764 status = SYS$GET (&uaf_rab);
4765 if (!(status&1))
4766 {
4767 errno = EVMSERR;
4768 vaxc$errno = status;
4769 return 0;
4770 }
4771 /* close the User Authorization File */
4772 status = SYS$DISCONNECT (&uaf_rab);
4773 if (!(status&1))
4774 {
4775 errno = EVMSERR;
4776 vaxc$errno = status;
4777 return 0;
4778 }
4779 status = SYS$CLOSE (&uaf_fab);
4780 if (!(status&1))
4781 {
4782 errno = EVMSERR;
4783 vaxc$errno = status;
4784 return 0;
4785 }
4786 return &retuaf;
4787 }
4788
4789 static struct passwd retpw;
4790
4791 struct passwd *
4792 cnv_uaf_pw (up)
4793 struct UAF * up;
4794 {
4795 char * ptr;
4796
4797 /* copy these out first because if the username is 32 chars, the next
4798 section will overwrite the first byte of the UIC */
4799 retpw.pw_uid = up->uaf$w_mem;
4800 retpw.pw_gid = up->uaf$w_grp;
4801
4802 /* I suppose this is not the best style, to possibly overwrite one
4803 byte beyond the end of the field, but what the heck... */
4804 ptr = &up->uaf$t_username[UAF$S_USERNAME];
4805 while (ptr[-1] == ' ')
4806 ptr--;
4807 *ptr = '\0';
4808 strcpy (retpw.pw_name, up->uaf$t_username);
4809
4810 /* the rest of these are counted ascii strings */
4811 strncpy (retpw.pw_gecos, &up->uaf$t_owner[1], up->uaf$t_owner[0]);
4812 retpw.pw_gecos[up->uaf$t_owner[0]] = '\0';
4813 strncpy (retpw.pw_dir, &up->uaf$t_defdev[1], up->uaf$t_defdev[0]);
4814 retpw.pw_dir[up->uaf$t_defdev[0]] = '\0';
4815 strncat (retpw.pw_dir, &up->uaf$t_defdir[1], up->uaf$t_defdir[0]);
4816 retpw.pw_dir[up->uaf$t_defdev[0] + up->uaf$t_defdir[0]] = '\0';
4817 strncpy (retpw.pw_shell, &up->uaf$t_defcli[1], up->uaf$t_defcli[0]);
4818 retpw.pw_shell[up->uaf$t_defcli[0]] = '\0';
4819
4820 return &retpw;
4821 }
4822 #else /* not READ_SYSUAF */
4823 static struct passwd retpw;
4824 #endif /* not READ_SYSUAF */
4825
4826 struct passwd *
4827 getpwnam (name)
4828 char * name;
4829 {
4830 #ifdef READ_SYSUAF
4831 struct UAF *up;
4832 #else
4833 char * user;
4834 char * dir;
4835 unsigned char * full;
4836 #endif /* READ_SYSUAF */
4837 char *ptr = name;
4838
4839 while (*ptr)
4840 {
4841 if ('a' <= *ptr && *ptr <= 'z')
4842 *ptr -= 040;
4843 ptr++;
4844 }
4845 #ifdef READ_SYSUAF
4846 if (!(up = get_uaf_name (name)))
4847 return 0;
4848 return cnv_uaf_pw (up);
4849 #else
4850 if (strcmp (name, getenv ("USER")) == 0)
4851 {
4852 retpw.pw_uid = getuid ();
4853 retpw.pw_gid = getgid ();
4854 strcpy (retpw.pw_name, name);
4855 if (full = egetenv ("FULLNAME"))
4856 strcpy (retpw.pw_gecos, full);
4857 else
4858 *retpw.pw_gecos = '\0';
4859 strcpy (retpw.pw_dir, egetenv ("HOME"));
4860 *retpw.pw_shell = '\0';
4861 return &retpw;
4862 }
4863 else
4864 return 0;
4865 #endif /* not READ_SYSUAF */
4866 }
4867
4868 struct passwd *
4869 getpwuid (uid)
4870 unsigned long uid;
4871 {
4872 #ifdef READ_SYSUAF
4873 struct UAF * up;
4874
4875 if (!(up = get_uaf_uic (uid)))
4876 return 0;
4877 return cnv_uaf_pw (up);
4878 #else
4879 if (uid == sys_getuid ())
4880 return getpwnam (egetenv ("USER"));
4881 else
4882 return 0;
4883 #endif /* not READ_SYSUAF */
4884 }
4885
4886 /* return total address space available to the current process. This is
4887 the sum of the current p0 size, p1 size and free page table entries
4888 available. */
4889 int
4890 vlimit ()
4891 {
4892 int item_code;
4893 unsigned long free_pages;
4894 unsigned long frep0va;
4895 unsigned long frep1va;
4896 register status;
4897
4898 item_code = JPI$_FREPTECNT;
4899 if (((status = LIB$GETJPI (&item_code, 0, 0, &free_pages)) & 1) == 0)
4900 {
4901 errno = EVMSERR;
4902 vaxc$errno = status;
4903 return -1;
4904 }
4905 free_pages *= 512;
4906
4907 item_code = JPI$_FREP0VA;
4908 if (((status = LIB$GETJPI (&item_code, 0, 0, &frep0va)) & 1) == 0)
4909 {
4910 errno = EVMSERR;
4911 vaxc$errno = status;
4912 return -1;
4913 }
4914 item_code = JPI$_FREP1VA;
4915 if (((status = LIB$GETJPI (&item_code, 0, 0, &frep1va)) & 1) == 0)
4916 {
4917 errno = EVMSERR;
4918 vaxc$errno = status;
4919 return -1;
4920 }
4921
4922 return free_pages + frep0va + (0x7fffffff - frep1va);
4923 }
4924
4925 int
4926 define_logical_name (varname, string)
4927 char *varname;
4928 char *string;
4929 {
4930 struct dsc$descriptor_s strdsc =
4931 {strlen (string), DSC$K_DTYPE_T, DSC$K_CLASS_S, string};
4932 struct dsc$descriptor_s envdsc =
4933 {strlen (varname), DSC$K_DTYPE_T, DSC$K_CLASS_S, varname};
4934 struct dsc$descriptor_s lnmdsc =
4935 {7, DSC$K_DTYPE_T, DSC$K_CLASS_S, "LNM$JOB"};
4936
4937 return LIB$SET_LOGICAL (&envdsc, &strdsc, &lnmdsc, 0, 0);
4938 }
4939
4940 int
4941 delete_logical_name (varname)
4942 char *varname;
4943 {
4944 struct dsc$descriptor_s envdsc =
4945 {strlen (varname), DSC$K_DTYPE_T, DSC$K_CLASS_S, varname};
4946 struct dsc$descriptor_s lnmdsc =
4947 {7, DSC$K_DTYPE_T, DSC$K_CLASS_S, "LNM$JOB"};
4948
4949 return LIB$DELETE_LOGICAL (&envdsc, &lnmdsc);
4950 }
4951
4952 int
4953 ulimit ()
4954 {
4955 return 0;
4956 }
4957
4958 int
4959 setpgrp ()
4960 {
4961 return 0;
4962 }
4963
4964 int
4965 execvp ()
4966 {
4967 error ("execvp system call not implemented");
4968 return -1;
4969 }
4970
4971 int
4972 rename (from, to)
4973 char *from, *to;
4974 {
4975 int status;
4976 struct FAB from_fab = cc$rms_fab, to_fab = cc$rms_fab;
4977 struct NAM from_nam = cc$rms_nam, to_nam = cc$rms_nam;
4978 char from_esn[NAM$C_MAXRSS];
4979 char to_esn[NAM$C_MAXRSS];
4980
4981 from_fab.fab$l_fna = from;
4982 from_fab.fab$b_fns = strlen (from);
4983 from_fab.fab$l_nam = &from_nam;
4984 from_fab.fab$l_fop = FAB$M_NAM;
4985
4986 from_nam.nam$l_esa = from_esn;
4987 from_nam.nam$b_ess = sizeof from_esn;
4988
4989 to_fab.fab$l_fna = to;
4990 to_fab.fab$b_fns = strlen (to);
4991 to_fab.fab$l_nam = &to_nam;
4992 to_fab.fab$l_fop = FAB$M_NAM;
4993
4994 to_nam.nam$l_esa = to_esn;
4995 to_nam.nam$b_ess = sizeof to_esn;
4996
4997 status = SYS$RENAME (&from_fab, 0, 0, &to_fab);
4998
4999 if (status & 1)
5000 return 0;
5001 else
5002 {
5003 if (status == RMS$_DEV)
5004 errno = EXDEV;
5005 else
5006 errno = EVMSERR;
5007 vaxc$errno = status;
5008 return -1;
5009 }
5010 }
5011
5012 /* This function renames a file like `rename', but it strips
5013 the version number from the "to" filename, such that the "to" file is
5014 will always be a new version. It also sets the file protection once it is
5015 finished. The protection that we will use is stored in fab_final_pro,
5016 and was set when we did a creat_copy_attrs to create the file that we
5017 are renaming.
5018
5019 We could use the chmod function, but Eunichs uses 3 bits per user category
5020 to describe the protection, and VMS uses 4 (write and delete are separate
5021 bits). To maintain portability, the VMS implementation of `chmod' wires
5022 the W and D bits together. */
5023
5024
5025 static struct fibdef fib; /* We need this initialized to zero */
5026 char vms_file_written[NAM$C_MAXRSS];
5027
5028 int
5029 rename_sans_version (from,to)
5030 char *from, *to;
5031 {
5032 short int chan;
5033 int stat;
5034 short int iosb[4];
5035 int status;
5036 struct FAB to_fab = cc$rms_fab;
5037 struct NAM to_nam = cc$rms_nam;
5038 struct dsc$descriptor fib_d ={sizeof (fib),0,0,(char*) &fib};
5039 struct dsc$descriptor fib_attr[2]
5040 = {{sizeof (fab_final_pro),ATR$C_FPRO,0,(char*) &fab_final_pro},{0,0,0,0}};
5041 char to_esn[NAM$C_MAXRSS];
5042
5043 $DESCRIPTOR (disk,to_esn);
5044
5045 to_fab.fab$l_fna = to;
5046 to_fab.fab$b_fns = strlen (to);
5047 to_fab.fab$l_nam = &to_nam;
5048 to_fab.fab$l_fop = FAB$M_NAM;
5049
5050 to_nam.nam$l_esa = to_esn;
5051 to_nam.nam$b_ess = sizeof to_esn;
5052
5053 status = SYS$PARSE (&to_fab, 0, 0); /* figure out the full file name */
5054
5055 if (to_nam.nam$l_fnb && NAM$M_EXP_VER)
5056 *(to_nam.nam$l_ver) = '\0';
5057
5058 stat = rename (from, to_esn);
5059 if (stat < 0)
5060 return stat;
5061
5062 strcpy (vms_file_written, to_esn);
5063
5064 to_fab.fab$l_fna = vms_file_written; /* this points to the versionless name */
5065 to_fab.fab$b_fns = strlen (vms_file_written);
5066
5067 /* Now set the file protection to the correct value */
5068 SYS$OPEN (&to_fab, 0, 0); /* This fills in the nam$w_fid fields */
5069
5070 /* Copy these fields into the fib */
5071 fib.fib$r_fid_overlay.fib$w_fid[0] = to_nam.nam$w_fid[0];
5072 fib.fib$r_fid_overlay.fib$w_fid[1] = to_nam.nam$w_fid[1];
5073 fib.fib$r_fid_overlay.fib$w_fid[2] = to_nam.nam$w_fid[2];
5074
5075 SYS$CLOSE (&to_fab, 0, 0);
5076
5077 stat = SYS$ASSIGN (&disk, &chan, 0, 0); /* open a channel to the disk */
5078 if (!stat)
5079 LIB$SIGNAL (stat);
5080 stat = SYS$QIOW (0, chan, IO$_MODIFY, iosb, 0, 0, &fib_d,
5081 0, 0, 0, &fib_attr, 0);
5082 if (!stat)
5083 LIB$SIGNAL (stat);
5084 stat = SYS$DASSGN (chan);
5085 if (!stat)
5086 LIB$SIGNAL (stat);
5087 strcpy (vms_file_written, to_esn); /* We will write this to the terminal*/
5088 return 0;
5089 }
5090
5091 int
5092 link (file, new)
5093 char * file, * new;
5094 {
5095 register status;
5096 struct FAB fab;
5097 struct NAM nam;
5098 unsigned short fid[3];
5099 char esa[NAM$C_MAXRSS];
5100
5101 fab = cc$rms_fab;
5102 fab.fab$l_fop = FAB$M_OFP;
5103 fab.fab$l_fna = file;
5104 fab.fab$b_fns = strlen (file);
5105 fab.fab$l_nam = &nam;
5106
5107 nam = cc$rms_nam;
5108 nam.nam$l_esa = esa;
5109 nam.nam$b_ess = NAM$C_MAXRSS;
5110
5111 status = SYS$PARSE (&fab);
5112 if ((status & 1) == 0)
5113 {
5114 errno = EVMSERR;
5115 vaxc$errno = status;
5116 return -1;
5117 }
5118 status = SYS$SEARCH (&fab);
5119 if ((status & 1) == 0)
5120 {
5121 errno = EVMSERR;
5122 vaxc$errno = status;
5123 return -1;
5124 }
5125
5126 fid[0] = nam.nam$w_fid[0];
5127 fid[1] = nam.nam$w_fid[1];
5128 fid[2] = nam.nam$w_fid[2];
5129
5130 fab.fab$l_fna = new;
5131 fab.fab$b_fns = strlen (new);
5132
5133 status = SYS$PARSE (&fab);
5134 if ((status & 1) == 0)
5135 {
5136 errno = EVMSERR;
5137 vaxc$errno = status;
5138 return -1;
5139 }
5140
5141 nam.nam$w_fid[0] = fid[0];
5142 nam.nam$w_fid[1] = fid[1];
5143 nam.nam$w_fid[2] = fid[2];
5144
5145 nam.nam$l_esa = nam.nam$l_name;
5146 nam.nam$b_esl = nam.nam$b_name + nam.nam$b_type + nam.nam$b_ver;
5147
5148 status = SYS$ENTER (&fab);
5149 if ((status & 1) == 0)
5150 {
5151 errno = EVMSERR;
5152 vaxc$errno = status;
5153 return -1;
5154 }
5155
5156 return 0;
5157 }
5158
5159 void
5160 croak (badfunc)
5161 char *badfunc;
5162 {
5163 printf ("%s not yet implemented\r\n", badfunc);
5164 reset_all_sys_modes ();
5165 exit (1);
5166 }
5167
5168 long
5169 random ()
5170 {
5171 /* Arrange to return a range centered on zero. */
5172 return rand () - (1 << 30);
5173 }
5174
5175 void
5176 srandom (seed)
5177 {
5178 srand (seed);
5179 }
5180 #endif /* VMS */
5181 \f
5182 #ifdef AIXHFT
5183
5184 /* Called from init_sys_modes. */
5185 void
5186 hft_init (struct tty_display_info *tty_out)
5187 {
5188 int junk;
5189
5190 /* If we're not on an HFT we shouldn't do any of this. We determine
5191 if we are on an HFT by trying to get an HFT error code. If this
5192 call fails, we're not on an HFT. */
5193 #ifdef IBMR2AIX
5194 if (ioctl (0, HFQERROR, &junk) < 0)
5195 return;
5196 #else /* not IBMR2AIX */
5197 if (ioctl (0, HFQEIO, 0) < 0)
5198 return;
5199 #endif /* not IBMR2AIX */
5200
5201 /* On AIX the default hft keyboard mapping uses backspace rather than delete
5202 as the rubout key's ASCII code. Here this is changed. The bug is that
5203 there's no way to determine the old mapping, so in reset_sys_modes
5204 we need to assume that the normal map had been present. Of course, this
5205 code also doesn't help if on a terminal emulator which doesn't understand
5206 HFT VTD's. */
5207 {
5208 struct hfbuf buf;
5209 struct hfkeymap keymap;
5210
5211 buf.hf_bufp = (char *)&keymap;
5212 buf.hf_buflen = sizeof (keymap);
5213 keymap.hf_nkeys = 2;
5214 keymap.hfkey[0].hf_kpos = 15;
5215 keymap.hfkey[0].hf_kstate = HFMAPCHAR | HFSHFNONE;
5216 #ifdef IBMR2AIX
5217 keymap.hfkey[0].hf_keyidh = '<';
5218 #else /* not IBMR2AIX */
5219 keymap.hfkey[0].hf_page = '<';
5220 #endif /* not IBMR2AIX */
5221 keymap.hfkey[0].hf_char = 127;
5222 keymap.hfkey[1].hf_kpos = 15;
5223 keymap.hfkey[1].hf_kstate = HFMAPCHAR | HFSHFSHFT;
5224 #ifdef IBMR2AIX
5225 keymap.hfkey[1].hf_keyidh = '<';
5226 #else /* not IBMR2AIX */
5227 keymap.hfkey[1].hf_page = '<';
5228 #endif /* not IBMR2AIX */
5229 keymap.hfkey[1].hf_char = 127;
5230 hftctl (0, HFSKBD, &buf);
5231 }
5232 }
5233
5234 /* Reset the rubout key to backspace. */
5235
5236 void
5237 hft_reset (struct tty_display_info *tty_out)
5238 {
5239 struct hfbuf buf;
5240 struct hfkeymap keymap;
5241 int junk;
5242
5243 #ifdef IBMR2AIX
5244 if (ioctl (0, HFQERROR, &junk) < 0)
5245 return;
5246 #else /* not IBMR2AIX */
5247 if (ioctl (0, HFQEIO, 0) < 0)
5248 return;
5249 #endif /* not IBMR2AIX */
5250
5251 buf.hf_bufp = (char *)&keymap;
5252 buf.hf_buflen = sizeof (keymap);
5253 keymap.hf_nkeys = 2;
5254 keymap.hfkey[0].hf_kpos = 15;
5255 keymap.hfkey[0].hf_kstate = HFMAPCHAR | HFSHFNONE;
5256 #ifdef IBMR2AIX
5257 keymap.hfkey[0].hf_keyidh = '<';
5258 #else /* not IBMR2AIX */
5259 keymap.hfkey[0].hf_page = '<';
5260 #endif /* not IBMR2AIX */
5261 keymap.hfkey[0].hf_char = 8;
5262 keymap.hfkey[1].hf_kpos = 15;
5263 keymap.hfkey[1].hf_kstate = HFMAPCHAR | HFSHFSHFT;
5264 #ifdef IBMR2AIX
5265 keymap.hfkey[1].hf_keyidh = '<';
5266 #else /* not IBMR2AIX */
5267 keymap.hfkey[1].hf_page = '<';
5268 #endif /* not IBMR2AIX */
5269 keymap.hfkey[1].hf_char = 8;
5270 hftctl (0, HFSKBD, &buf);
5271 }
5272
5273 #endif /* AIXHFT */
5274
5275 \f
5276 #ifndef BSTRING
5277
5278 #ifndef bzero
5279
5280 void
5281 bzero (b, length)
5282 register char *b;
5283 register int length;
5284 {
5285 #ifdef VMS
5286 short zero = 0;
5287 long max_str = 65535;
5288
5289 while (length > max_str) {
5290 (void) LIB$MOVC5 (&zero, &zero, &zero, &max_str, b);
5291 length -= max_str;
5292 b += max_str;
5293 }
5294 max_str = length;
5295 (void) LIB$MOVC5 (&zero, &zero, &zero, &max_str, b);
5296 #else
5297 while (length-- > 0)
5298 *b++ = 0;
5299 #endif /* not VMS */
5300 }
5301
5302 #endif /* no bzero */
5303 #endif /* BSTRING */
5304
5305 #if (!defined (BSTRING) && !defined (bcopy)) || defined (NEED_BCOPY)
5306 #undef bcopy
5307
5308 /* Saying `void' requires a declaration, above, where bcopy is used
5309 and that declaration causes pain for systems where bcopy is a macro. */
5310 bcopy (b1, b2, length)
5311 register char *b1;
5312 register char *b2;
5313 register int length;
5314 {
5315 #ifdef VMS
5316 long max_str = 65535;
5317
5318 while (length > max_str) {
5319 (void) LIB$MOVC3 (&max_str, b1, b2);
5320 length -= max_str;
5321 b1 += max_str;
5322 b2 += max_str;
5323 }
5324 max_str = length;
5325 (void) LIB$MOVC3 (&length, b1, b2);
5326 #else
5327 while (length-- > 0)
5328 *b2++ = *b1++;
5329 #endif /* not VMS */
5330 }
5331 #endif /* (!defined (BSTRING) && !defined (bcopy)) || defined (NEED_BCOPY) */
5332
5333 #ifndef BSTRING
5334 #ifndef bcmp
5335 int
5336 bcmp (b1, b2, length) /* This could be a macro! */
5337 register char *b1;
5338 register char *b2;
5339 register int length;
5340 {
5341 #ifdef VMS
5342 struct dsc$descriptor_s src1 = {length, DSC$K_DTYPE_T, DSC$K_CLASS_S, b1};
5343 struct dsc$descriptor_s src2 = {length, DSC$K_DTYPE_T, DSC$K_CLASS_S, b2};
5344
5345 return STR$COMPARE (&src1, &src2);
5346 #else
5347 while (length-- > 0)
5348 if (*b1++ != *b2++)
5349 return 1;
5350
5351 return 0;
5352 #endif /* not VMS */
5353 }
5354 #endif /* no bcmp */
5355 #endif /* not BSTRING */
5356 \f
5357 #ifndef HAVE_STRSIGNAL
5358 char *
5359 strsignal (code)
5360 int code;
5361 {
5362 char *signame = 0;
5363
5364 if (0 <= code && code < NSIG)
5365 {
5366 #ifdef VMS
5367 signame = sys_errlist[code];
5368 #else
5369 /* Cast to suppress warning if the table has const char *. */
5370 signame = (char *) sys_siglist[code];
5371 #endif
5372 }
5373
5374 return signame;
5375 }
5376 #endif /* HAVE_STRSIGNAL */
5377
5378 /* arch-tag: edb43589-4e09-4544-b325-978b5b121dcf
5379 (do not change this comment) */
Unnamed repository; edit this file 'description' to name the repository.