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[bpt/emacs.git] / src / sysdep.c
1 /* Interfaces to system-dependent kernel and library entries.
2 Copyright (C) 1985, 86, 87, 88, 93, 94, 95 Free Software Foundation, Inc.
3
4 This file is part of GNU Emacs.
5
6 GNU Emacs is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
9 any later version.
10
11 GNU Emacs is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with GNU Emacs; see the file COPYING. If not, write to
18 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
20
21
22 #include <signal.h>
23 #include <setjmp.h>
24
25 #include <config.h>
26 #ifdef STDC_HEADERS
27 #include <stdlib.h>
28 #endif
29 #include "lisp.h"
30 #include "blockinput.h"
31 #undef NULL
32
33 #define min(x,y) ((x) > (y) ? (y) : (x))
34
35 /* In this file, open, read and write refer to the system calls,
36 not our sugared interfaces sys_open, sys_read and sys_write.
37 Contrariwise, for systems where we use the system calls directly,
38 define sys_read, etc. here as aliases for them. */
39 #ifndef read
40 #define sys_read read
41 #define sys_write write
42 #endif /* `read' is not a macro */
43
44 #undef read
45 #undef write
46
47 #ifdef WINDOWSNT
48 #define read _read
49 #define write _write
50 #include <windows.h>
51 extern int errno;
52 #endif /* not WINDOWSNT */
53
54 #ifndef close
55 #define sys_close close
56 #else
57 #undef close
58 #endif
59
60 #ifndef open
61 #define sys_open open
62 #else /* `open' is a macro */
63 #undef open
64 #endif /* `open' is a macro */
65
66 /* Does anyone other than VMS need this? */
67 #ifndef fwrite
68 #define sys_fwrite fwrite
69 #else
70 #undef fwrite
71 #endif
72
73 #ifndef HAVE_H_ERRNO
74 extern int h_errno;
75 #endif
76
77 #include <stdio.h>
78 #include <sys/types.h>
79 #include <sys/stat.h>
80 #include <errno.h>
81
82 /* Get _POSIX_VDISABLE, if it is available. */
83 #ifdef HAVE_UNISTD_H
84 #include <unistd.h>
85 #endif
86
87 /* Get SI_SRPC_DOMAIN, if it is available. */
88 #ifdef HAVE_SYS_SYSTEMINFO_H
89 #include <sys/systeminfo.h>
90 #endif
91
92 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida, MW Aug 1993 */
93 #include <dos.h>
94 #include "dosfns.h"
95 #include "msdos.h"
96 #include <sys/param.h>
97
98 #if __DJGPP__ > 1
99 extern int etext;
100 extern unsigned start __asm__ ("start");
101 #endif
102 #endif
103
104 #ifndef errno
105 extern int errno;
106 #endif
107
108 #ifdef VMS
109 #include <rms.h>
110 #include <ttdef.h>
111 #include <tt2def.h>
112 #include <iodef.h>
113 #include <ssdef.h>
114 #include <descrip.h>
115 #include <fibdef.h>
116 #include <atrdef.h>
117 #include <ctype.h>
118 #include <string.h>
119 #ifdef __GNUC__
120 #include <sys/file.h>
121 #else
122 #include <file.h>
123 #endif
124 #undef F_SETFL
125 #ifndef RAB$C_BID
126 #include <rab.h>
127 #endif
128 #define MAXIOSIZE (32 * PAGESIZE) /* Don't I/O more than 32 blocks at a time */
129 #endif /* VMS */
130
131 #ifndef BSD4_1
132 #ifdef BSD_SYSTEM /* avoid writing defined (BSD_SYSTEM) || defined (USG)
133 because the vms compiler doesn't grok `defined' */
134 #include <fcntl.h>
135 #endif
136 #ifdef USG
137 #ifndef USG5
138 #include <fcntl.h>
139 #endif
140 #endif
141 #endif /* not 4.1 bsd */
142
143 #ifndef MSDOS
144 #include <sys/ioctl.h>
145 #endif
146
147 #include "systty.h"
148 #include "syswait.h"
149
150 #ifdef BROKEN_TIOCGWINSZ
151 #undef TIOCGWINSZ
152 #undef TIOCSWINSZ
153 #endif
154
155 #if defined(USG) || defined(DGUX)
156 #include <sys/utsname.h>
157 #include <string.h>
158 #ifndef MEMORY_IN_STRING_H
159 #include <memory.h>
160 #endif
161 #if defined (TIOCGWINSZ) || defined (ISC4_0)
162 #ifdef NEED_SIOCTL
163 #include <sys/sioctl.h>
164 #endif
165 #ifdef NEED_PTEM_H
166 #include <sys/stream.h>
167 #include <sys/ptem.h>
168 #endif
169 #endif /* TIOCGWINSZ or ISC4_0 */
170 #endif /* USG or DGUX */
171
172 extern int quit_char;
173
174 #include "frame.h"
175 #include "window.h"
176 #include "termhooks.h"
177 #include "termchar.h"
178 #include "termopts.h"
179 #include "dispextern.h"
180 #include "process.h"
181
182 #ifdef WINDOWSNT
183 #include <direct.h>
184 /* In process.h which conflicts with the local copy. */
185 #define _P_WAIT 0
186 int _CRTAPI1 _spawnlp (int, const char *, const char *, ...);
187 int _CRTAPI1 _getpid (void);
188 #endif
189
190 #ifdef NONSYSTEM_DIR_LIBRARY
191 #include "ndir.h"
192 #endif /* NONSYSTEM_DIR_LIBRARY */
193
194 #include "syssignal.h"
195 #include "systime.h"
196 #ifdef HAVE_UTIME_H
197 #include <utime.h>
198 #endif
199
200 #ifndef HAVE_UTIMES
201 #ifndef HAVE_STRUCT_UTIMBUF
202 /* We want to use utime rather than utimes, but we couldn't find the
203 structure declaration. We'll use the traditional one. */
204 struct utimbuf {
205 long actime;
206 long modtime;
207 };
208 #endif
209 #endif
210
211 #ifndef VFORK_RETURN_TYPE
212 #define VFORK_RETURN_TYPE int
213 #endif
214
215 /* LPASS8 is new in 4.3, and makes cbreak mode provide all 8 bits. */
216 #ifndef LPASS8
217 #define LPASS8 0
218 #endif
219
220 #ifdef BSD4_1
221 #define LNOFLSH 0100000
222 #endif
223
224 static int baud_convert[] =
225 #ifdef BAUD_CONVERT
226 BAUD_CONVERT;
227 #else
228 {
229 0, 50, 75, 110, 135, 150, 200, 300, 600, 1200,
230 1800, 2400, 4800, 9600, 19200, 38400
231 };
232 #endif
233
234 #if defined (HAVE_LIBNCURSES) && ! defined (NCURSES_OSPEED_T)
235 extern short ospeed;
236 #else
237 #if defined (HAVE_TERMIOS_H) && defined (LINUX)
238 #include <termios.h>
239 /* HJL's version of libc is said to need this on the Alpha.
240 On the other hand, DEC OSF1 on the Alpha needs ospeed to be a short. */
241 extern speed_t ospeed;
242 #else
243 extern short ospeed;
244 #endif
245 #endif
246
247 /* The file descriptor for Emacs's input terminal.
248 Under Unix, this is normally zero except when using X;
249 under VMS, we place the input channel number here. */
250 int input_fd;
251
252 void croak P_ ((char *));
253
254 #ifdef AIXHFT
255 void hft_init ();
256 void hft_reset ();
257 #endif
258
259 \f
260 /* Specify a different file descriptor for further input operations. */
261
262 void
263 change_input_fd (fd)
264 int fd;
265 {
266 input_fd = fd;
267 }
268
269 /* Discard pending input on descriptor input_fd. */
270
271 void
272 discard_tty_input ()
273 {
274 #ifndef WINDOWSNT
275 struct emacs_tty buf;
276
277 if (noninteractive)
278 return;
279
280 /* Discarding input is not safe when the input could contain
281 replies from the X server. So don't do it. */
282 if (read_socket_hook)
283 return;
284
285 #ifdef VMS
286 end_kbd_input ();
287 SYS$QIOW (0, input_fd, IO$_READVBLK|IO$M_PURGE, input_iosb, 0, 0,
288 &buf.main, 0, 0, terminator_mask, 0, 0);
289 queue_kbd_input ();
290 #else /* not VMS */
291 #ifdef APOLLO
292 {
293 int zero = 0;
294 ioctl (input_fd, TIOCFLUSH, &zero);
295 }
296 #else /* not Apollo */
297 #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */
298 while (dos_keyread () != -1)
299 ;
300 #else /* not MSDOS */
301 EMACS_GET_TTY (input_fd, &buf);
302 EMACS_SET_TTY (input_fd, &buf, 0);
303 #endif /* not MSDOS */
304 #endif /* not Apollo */
305 #endif /* not VMS */
306 #endif /* not WINDOWSNT */
307 }
308
309 #ifdef SIGTSTP
310
311 /* Arrange for character C to be read as the next input from
312 the terminal. */
313
314 void
315 stuff_char (c)
316 char c;
317 {
318 if (read_socket_hook)
319 return;
320
321 /* Should perhaps error if in batch mode */
322 #ifdef TIOCSTI
323 ioctl (input_fd, TIOCSTI, &c);
324 #else /* no TIOCSTI */
325 error ("Cannot stuff terminal input characters in this version of Unix");
326 #endif /* no TIOCSTI */
327 }
328
329 #endif /* SIGTSTP */
330 \f
331 void
332 init_baud_rate ()
333 {
334 if (noninteractive)
335 ospeed = 0;
336 else
337 {
338 #ifdef INIT_BAUD_RATE
339 INIT_BAUD_RATE ();
340 #else
341 #ifdef DOS_NT
342 ospeed = 15;
343 #else /* not DOS_NT */
344 #ifdef VMS
345 struct sensemode sg;
346
347 SYS$QIOW (0, input_fd, IO$_SENSEMODE, &sg, 0, 0,
348 &sg.class, 12, 0, 0, 0, 0 );
349 ospeed = sg.xmit_baud;
350 #else /* not VMS */
351 #ifdef HAVE_TERMIOS
352 struct termios sg;
353
354 sg.c_cflag = B9600;
355 tcgetattr (input_fd, &sg);
356 ospeed = cfgetospeed (&sg);
357 #if defined (USE_GETOBAUD) && defined (getobaud)
358 /* m88k-motorola-sysv3 needs this (ghazi@noc.rutgers.edu) 9/1/94. */
359 if (ospeed == 0)
360 ospeed = getobaud (sg.c_cflag);
361 #endif
362 #else /* neither VMS nor TERMIOS */
363 #ifdef HAVE_TERMIO
364 struct termio sg;
365
366 sg.c_cflag = B9600;
367 #ifdef HAVE_TCATTR
368 tcgetattr (input_fd, &sg);
369 #else
370 ioctl (input_fd, TCGETA, &sg);
371 #endif
372 ospeed = sg.c_cflag & CBAUD;
373 #else /* neither VMS nor TERMIOS nor TERMIO */
374 struct sgttyb sg;
375
376 sg.sg_ospeed = B9600;
377 if (ioctl (input_fd, TIOCGETP, &sg) < 0)
378 abort ();
379 ospeed = sg.sg_ospeed;
380 #endif /* not HAVE_TERMIO */
381 #endif /* not HAVE_TERMIOS */
382 #endif /* not VMS */
383 #endif /* not DOS_NT */
384 #endif /* not INIT_BAUD_RATE */
385 }
386
387 baud_rate = (ospeed < sizeof baud_convert / sizeof baud_convert[0]
388 ? baud_convert[ospeed] : 9600);
389 if (baud_rate == 0)
390 baud_rate = 1200;
391 }
392
393 /*ARGSUSED*/
394 void
395 set_exclusive_use (fd)
396 int fd;
397 {
398 #ifdef FIOCLEX
399 ioctl (fd, FIOCLEX, 0);
400 #endif
401 /* Ok to do nothing if this feature does not exist */
402 }
403 \f
404 #ifndef subprocesses
405
406 wait_without_blocking ()
407 {
408 #ifdef BSD_SYSTEM
409 wait3 (0, WNOHANG | WUNTRACED, 0);
410 #else
411 croak ("wait_without_blocking");
412 #endif
413 synch_process_alive = 0;
414 }
415
416 #endif /* not subprocesses */
417
418 int wait_debugging; /* Set nonzero to make following function work under dbx
419 (at least for bsd). */
420
421 SIGTYPE
422 wait_for_termination_signal ()
423 {}
424
425 /* Wait for subprocess with process id `pid' to terminate and
426 make sure it will get eliminated (not remain forever as a zombie) */
427
428 void
429 wait_for_termination (pid)
430 int pid;
431 {
432 while (1)
433 {
434 #ifdef subprocesses
435 #ifdef VMS
436 int status;
437
438 status = SYS$FORCEX (&pid, 0, 0);
439 break;
440 #else /* not VMS */
441 #if defined (BSD_SYSTEM) || (defined (HPUX) && !defined (HPUX_5))
442 /* Note that kill returns -1 even if the process is just a zombie now.
443 But inevitably a SIGCHLD interrupt should be generated
444 and child_sig will do wait3 and make the process go away. */
445 /* There is some indication that there is a bug involved with
446 termination of subprocesses, perhaps involving a kernel bug too,
447 but no idea what it is. Just as a hunch we signal SIGCHLD to see
448 if that causes the problem to go away or get worse. */
449 sigsetmask (sigmask (SIGCHLD));
450 if (0 > kill (pid, 0))
451 {
452 sigsetmask (SIGEMPTYMASK);
453 kill (getpid (), SIGCHLD);
454 break;
455 }
456 if (wait_debugging)
457 sleep (1);
458 else
459 sigpause (SIGEMPTYMASK);
460 #else /* not BSD_SYSTEM, and not HPUX version >= 6 */
461 #if defined (UNIPLUS)
462 if (0 > kill (pid, 0))
463 break;
464 wait (0);
465 #else /* neither BSD_SYSTEM nor UNIPLUS: random sysV */
466 #ifdef POSIX_SIGNALS /* would this work for LINUX as well? */
467 sigblock (sigmask (SIGCHLD));
468 if (0 > kill (pid, 0))
469 {
470 sigunblock (sigmask (SIGCHLD));
471 break;
472 }
473 sigpause (SIGEMPTYMASK);
474 #else /* not POSIX_SIGNALS */
475 #ifdef HAVE_SYSV_SIGPAUSE
476 sighold (SIGCHLD);
477 if (0 > kill (pid, 0))
478 {
479 sigrelse (SIGCHLD);
480 break;
481 }
482 sigpause (SIGCHLD);
483 #else /* not HAVE_SYSV_SIGPAUSE */
484 #ifdef WINDOWSNT
485 wait (0);
486 break;
487 #else /* not WINDOWSNT */
488 if (0 > kill (pid, 0))
489 break;
490 /* Using sleep instead of pause avoids timing error.
491 If the inferior dies just before the sleep,
492 we lose just one second. */
493 sleep (1);
494 #endif /* not WINDOWSNT */
495 #endif /* not HAVE_SYSV_SIGPAUSE */
496 #endif /* not POSIX_SIGNALS */
497 #endif /* not UNIPLUS */
498 #endif /* not BSD_SYSTEM, and not HPUX version >= 6 */
499 #endif /* not VMS */
500 #else /* not subprocesses */
501 #if __DJGPP__ > 1
502 break;
503 #else /* not __DJGPP__ > 1 */
504 #ifndef BSD4_1
505 if (kill (pid, 0) < 0)
506 break;
507 wait (0);
508 #else /* BSD4_1 */
509 int status;
510 status = wait (0);
511 if (status == pid || status == -1)
512 break;
513 #endif /* BSD4_1 */
514 #endif /* not __DJGPP__ > 1*/
515 #endif /* not subprocesses */
516 }
517 }
518
519 #ifdef subprocesses
520
521 /*
522 * flush any pending output
523 * (may flush input as well; it does not matter the way we use it)
524 */
525
526 void
527 flush_pending_output (channel)
528 int channel;
529 {
530 #ifdef HAVE_TERMIOS
531 /* If we try this, we get hit with SIGTTIN, because
532 the child's tty belongs to the child's pgrp. */
533 #else
534 #ifdef TCFLSH
535 ioctl (channel, TCFLSH, 1);
536 #else
537 #ifdef TIOCFLUSH
538 int zero = 0;
539 /* 3rd arg should be ignored
540 but some 4.2 kernels actually want the address of an int
541 and nonzero means something different. */
542 ioctl (channel, TIOCFLUSH, &zero);
543 #endif
544 #endif
545 #endif
546 }
547 \f
548 #ifndef VMS
549 /* Set up the terminal at the other end of a pseudo-terminal that
550 we will be controlling an inferior through.
551 It should not echo or do line-editing, since that is done
552 in Emacs. No padding needed for insertion into an Emacs buffer. */
553
554 void
555 child_setup_tty (out)
556 int out;
557 {
558 #ifndef DOS_NT
559 struct emacs_tty s;
560
561 EMACS_GET_TTY (out, &s);
562
563 #if defined (HAVE_TERMIO) || defined (HAVE_TERMIOS)
564 s.main.c_oflag |= OPOST; /* Enable output postprocessing */
565 s.main.c_oflag &= ~ONLCR; /* Disable map of NL to CR-NL on output */
566 #ifdef NLDLY
567 s.main.c_oflag &= ~(NLDLY|CRDLY|TABDLY|BSDLY|VTDLY|FFDLY);
568 /* No output delays */
569 #endif
570 s.main.c_lflag &= ~ECHO; /* Disable echo */
571 s.main.c_lflag |= ISIG; /* Enable signals */
572 #ifdef IUCLC
573 s.main.c_iflag &= ~IUCLC; /* Disable downcasing on input. */
574 #endif
575 #ifdef ISTRIP
576 s.main.c_iflag &= ~ISTRIP; /* don't strip 8th bit on input */
577 #endif
578 #ifdef OLCUC
579 s.main.c_oflag &= ~OLCUC; /* Disable upcasing on output. */
580 #endif
581 s.main.c_oflag &= ~TAB3; /* Disable tab expansion */
582 s.main.c_cflag = (s.main.c_cflag & ~CSIZE) | CS8; /* Don't strip 8th bit */
583 #if 0
584 /* Said to be unnecessary: */
585 s.main.c_cc[VMIN] = 1; /* minimum number of characters to accept */
586 s.main.c_cc[VTIME] = 0; /* wait forever for at least 1 character */
587 #endif
588
589 s.main.c_lflag |= ICANON; /* Enable erase/kill and eof processing */
590 s.main.c_cc[VEOF] = 04; /* insure that EOF is Control-D */
591 s.main.c_cc[VERASE] = CDISABLE; /* disable erase processing */
592 s.main.c_cc[VKILL] = CDISABLE; /* disable kill processing */
593
594 #ifdef HPUX
595 s.main.c_cflag = (s.main.c_cflag & ~CBAUD) | B9600; /* baud rate sanity */
596 #endif /* HPUX */
597
598 #ifdef AIX
599 /* AIX enhanced edit loses NULs, so disable it */
600 #ifndef IBMR2AIX
601 s.main.c_line = 0;
602 s.main.c_iflag &= ~ASCEDIT;
603 #endif
604 /* Also, PTY overloads NUL and BREAK.
605 don't ignore break, but don't signal either, so it looks like NUL. */
606 s.main.c_iflag &= ~IGNBRK;
607 s.main.c_iflag &= ~BRKINT;
608 /* QUIT and INTR work better as signals, so disable character forms */
609 s.main.c_cc[VINTR] = 0377;
610 #ifdef SIGNALS_VIA_CHARACTERS
611 /* the QUIT and INTR character are used in process_send_signal
612 so set them here to something useful. */
613 if (s.main.c_cc[VQUIT] == 0377)
614 s.main.c_cc[VQUIT] = '\\'&037; /* Control-\ */
615 if (s.main.c_cc[VINTR] == 0377)
616 s.main.c_cc[VINTR] = 'C'&037; /* Control-C */
617 #else /* no TIOCGPGRP or no TIOCGLTC or no TIOCGETC */
618 /* QUIT and INTR work better as signals, so disable character forms */
619 s.main.c_cc[VQUIT] = 0377;
620 s.main.c_cc[VINTR] = 0377;
621 s.main.c_lflag &= ~ISIG;
622 #endif /* no TIOCGPGRP or no TIOCGLTC or no TIOCGETC */
623 s.main.c_cc[VEOL] = 0377;
624 s.main.c_cflag = (s.main.c_cflag & ~CBAUD) | B9600; /* baud rate sanity */
625 #endif /* AIX */
626
627 #else /* not HAVE_TERMIO */
628
629 s.main.sg_flags &= ~(ECHO | CRMOD | ANYP | ALLDELAY | RAW | LCASE
630 | CBREAK | TANDEM);
631 s.main.sg_flags |= LPASS8;
632 s.main.sg_erase = 0377;
633 s.main.sg_kill = 0377;
634 s.lmode = LLITOUT | s.lmode; /* Don't strip 8th bit */
635
636 #endif /* not HAVE_TERMIO */
637
638 EMACS_SET_TTY (out, &s, 0);
639
640 #ifdef BSD4_1
641 if (interrupt_input)
642 reset_sigio ();
643 #endif /* BSD4_1 */
644 #ifdef RTU
645 {
646 int zero = 0;
647 ioctl (out, FIOASYNC, &zero);
648 }
649 #endif /* RTU */
650 #endif /* not DOS_NT */
651 }
652 #endif /* not VMS */
653
654 #endif /* subprocesses */
655 \f
656 /* Record a signal code and the handler for it. */
657 struct save_signal
658 {
659 int code;
660 SIGTYPE (*handler) P_ ((int));
661 };
662
663 static void save_signal_handlers P_ ((struct save_signal *));
664 static void restore_signal_handlers P_ ((struct save_signal *));
665
666 /* Suspend the Emacs process; give terminal to its superior. */
667
668 void
669 sys_suspend ()
670 {
671 #ifdef VMS
672 /* "Foster" parentage allows emacs to return to a subprocess that attached
673 to the current emacs as a cheaper than starting a whole new process. This
674 is set up by KEPTEDITOR.COM. */
675 unsigned long parent_id, foster_parent_id;
676 char *fpid_string;
677
678 fpid_string = getenv ("EMACS_PARENT_PID");
679 if (fpid_string != NULL)
680 {
681 sscanf (fpid_string, "%x", &foster_parent_id);
682 if (foster_parent_id != 0)
683 parent_id = foster_parent_id;
684 else
685 parent_id = getppid ();
686 }
687 else
688 parent_id = getppid ();
689
690 xfree (fpid_string); /* On VMS, this was malloc'd */
691
692 if (parent_id && parent_id != 0xffffffff)
693 {
694 SIGTYPE (*oldsig)() = (int) signal (SIGINT, SIG_IGN);
695 int status = LIB$ATTACH (&parent_id) & 1;
696 signal (SIGINT, oldsig);
697 return status;
698 }
699 else
700 {
701 struct {
702 int l;
703 char *a;
704 } d_prompt;
705 d_prompt.l = sizeof ("Emacs: "); /* Our special prompt */
706 d_prompt.a = "Emacs: "; /* Just a reminder */
707 LIB$SPAWN (0, 0, 0, 0, 0, 0, 0, 0, 0, 0, &d_prompt, 0);
708 return 1;
709 }
710 return -1;
711 #else
712 #if defined(SIGTSTP) && !defined(MSDOS)
713
714 {
715 int pgrp = EMACS_GETPGRP (0);
716 EMACS_KILLPG (pgrp, SIGTSTP);
717 }
718
719 #else /* No SIGTSTP */
720 #ifdef USG_JOBCTRL /* If you don't know what this is don't mess with it */
721 ptrace (0, 0, 0, 0); /* set for ptrace - caught by csh */
722 kill (getpid (), SIGQUIT);
723
724 #else /* No SIGTSTP or USG_JOBCTRL */
725
726 /* On a system where suspending is not implemented,
727 instead fork a subshell and let it talk directly to the terminal
728 while we wait. */
729 sys_subshell ();
730
731 #endif /* no USG_JOBCTRL */
732 #endif /* no SIGTSTP */
733 #endif /* not VMS */
734 }
735
736 /* Fork a subshell. */
737
738 void
739 sys_subshell ()
740 {
741 #ifndef VMS
742 #ifdef DOS_NT /* Demacs 1.1.2 91/10/20 Manabu Higashida */
743 int st;
744 char oldwd[MAXPATHLEN+1]; /* Fixed length is safe on MSDOS. */
745 #endif
746 int pid;
747 struct save_signal saved_handlers[5];
748 Lisp_Object dir;
749 unsigned char *str = 0;
750 int len;
751
752 saved_handlers[0].code = SIGINT;
753 saved_handlers[1].code = SIGQUIT;
754 saved_handlers[2].code = SIGTERM;
755 #ifdef SIGIO
756 saved_handlers[3].code = SIGIO;
757 saved_handlers[4].code = 0;
758 #else
759 saved_handlers[3].code = 0;
760 #endif
761
762 /* Mentioning current_buffer->buffer would mean including buffer.h,
763 which somehow wedges the hp compiler. So instead... */
764
765 dir = intern ("default-directory");
766 if (NILP (Fboundp (dir)))
767 goto xyzzy;
768 dir = Fsymbol_value (dir);
769 if (!STRINGP (dir))
770 goto xyzzy;
771
772 dir = expand_and_dir_to_file (Funhandled_file_name_directory (dir), Qnil);
773 str = (unsigned char *) alloca (XSTRING (dir)->size + 2);
774 len = XSTRING (dir)->size;
775 bcopy (XSTRING (dir)->data, str, len);
776 if (str[len - 1] != '/') str[len++] = '/';
777 str[len] = 0;
778 xyzzy:
779
780 #ifdef DOS_NT
781 pid = 0;
782 #if __DJGPP__ > 1
783 save_signal_handlers (saved_handlers);
784 synch_process_alive = 1;
785 #endif /* __DJGPP__ > 1 */
786 #else
787 pid = vfork ();
788 if (pid == -1)
789 error ("Can't spawn subshell");
790 #endif
791
792 if (pid == 0)
793 {
794 char *sh = 0;
795
796 #ifdef DOS_NT /* MW, Aug 1993 */
797 getwd (oldwd);
798 if (sh == 0)
799 sh = (char *) egetenv ("SUSPEND"); /* KFS, 1994-12-14 */
800 #endif
801 if (sh == 0)
802 sh = (char *) egetenv ("SHELL");
803 if (sh == 0)
804 sh = "sh";
805
806 /* Use our buffer's default directory for the subshell. */
807 if (str)
808 chdir ((char *) str);
809
810 #ifdef subprocesses
811 close_process_descs (); /* Close Emacs's pipes/ptys */
812 #endif
813
814 #ifdef SET_EMACS_PRIORITY
815 {
816 extern int emacs_priority;
817
818 if (emacs_priority < 0)
819 nice (-emacs_priority);
820 }
821 #endif
822
823 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */
824 st = system (sh);
825 chdir (oldwd);
826 #if 0 /* This is also reported if last command executed in subshell failed, KFS */
827 if (st)
828 report_file_error ("Can't execute subshell", Fcons (build_string (sh), Qnil));
829 #endif
830 #else /* not MSDOS */
831 #ifdef WINDOWSNT
832 /* Waits for process completion */
833 pid = _spawnlp (_P_WAIT, sh, sh, NULL);
834 chdir (oldwd);
835 if (pid == -1)
836 write (1, "Can't execute subshell", 22);
837 #else /* not WINDOWSNT */
838 execlp (sh, sh, 0);
839 write (1, "Can't execute subshell", 22);
840 _exit (1);
841 #endif /* not WINDOWSNT */
842 #endif /* not MSDOS */
843 }
844
845 /* Do this now if we did not do it before. */
846 #if !defined (MSDOS) || __DJGPP__ == 1
847 save_signal_handlers (saved_handlers);
848 synch_process_alive = 1;
849 #endif
850
851 #ifndef DOS_NT
852 wait_for_termination (pid);
853 #endif
854 restore_signal_handlers (saved_handlers);
855 synch_process_alive = 0;
856 #endif /* !VMS */
857 }
858
859 static void
860 save_signal_handlers (saved_handlers)
861 struct save_signal *saved_handlers;
862 {
863 while (saved_handlers->code)
864 {
865 saved_handlers->handler
866 = (SIGTYPE (*) P_ ((int))) signal (saved_handlers->code, SIG_IGN);
867 saved_handlers++;
868 }
869 }
870
871 static void
872 restore_signal_handlers (saved_handlers)
873 struct save_signal *saved_handlers;
874 {
875 while (saved_handlers->code)
876 {
877 signal (saved_handlers->code, saved_handlers->handler);
878 saved_handlers++;
879 }
880 }
881 \f
882 #ifdef F_SETFL
883
884 int old_fcntl_flags;
885
886 void
887 init_sigio (fd)
888 int fd;
889 {
890 #ifdef FASYNC
891 old_fcntl_flags = fcntl (fd, F_GETFL, 0) & ~FASYNC;
892 fcntl (fd, F_SETFL, old_fcntl_flags | FASYNC);
893 #endif
894 interrupts_deferred = 0;
895 }
896
897 void
898 reset_sigio ()
899 {
900 unrequest_sigio ();
901 }
902
903 #ifdef FASYNC /* F_SETFL does not imply existence of FASYNC */
904
905 void
906 request_sigio ()
907 {
908 if (read_socket_hook)
909 return;
910
911 #ifdef SIGWINCH
912 sigunblock (sigmask (SIGWINCH));
913 #endif
914 fcntl (input_fd, F_SETFL, old_fcntl_flags | FASYNC);
915
916 interrupts_deferred = 0;
917 }
918
919 void
920 unrequest_sigio ()
921 {
922 if (read_socket_hook)
923 return;
924
925 #ifdef SIGWINCH
926 sigblock (sigmask (SIGWINCH));
927 #endif
928 fcntl (input_fd, F_SETFL, old_fcntl_flags);
929 interrupts_deferred = 1;
930 }
931
932 #else /* no FASYNC */
933 #ifdef STRIDE /* Stride doesn't have FASYNC - use FIOASYNC */
934
935 void
936 request_sigio ()
937 {
938 int on = 1;
939
940 if (read_socket_hook)
941 return;
942
943 ioctl (input_fd, FIOASYNC, &on);
944 interrupts_deferred = 0;
945 }
946
947 void
948 unrequest_sigio ()
949 {
950 int off = 0;
951
952 if (read_socket_hook)
953 return;
954
955 ioctl (input_fd, FIOASYNC, &off);
956 interrupts_deferred = 1;
957 }
958
959 #else /* not FASYNC, not STRIDE */
960
961 #ifdef _CX_UX
962
963 #include <termios.h>
964
965 void
966 request_sigio ()
967 {
968 int on = 1;
969 sigset_t st;
970
971 if (read_socket_hook)
972 return;
973
974 sigemptyset(&st);
975 sigaddset(&st, SIGIO);
976 ioctl (input_fd, FIOASYNC, &on);
977 interrupts_deferred = 0;
978 sigprocmask(SIG_UNBLOCK, &st, (sigset_t *)0);
979 }
980
981 void
982 unrequest_sigio ()
983 {
984 int off = 0;
985
986 if (read_socket_hook)
987 return;
988
989 ioctl (input_fd, FIOASYNC, &off);
990 interrupts_deferred = 1;
991 }
992
993 #else /* ! _CX_UX */
994
995 void
996 request_sigio ()
997 {
998 if (read_socket_hook)
999 return;
1000
1001 croak ("request_sigio");
1002 }
1003
1004 void
1005 unrequest_sigio ()
1006 {
1007 if (read_socket_hook)
1008 return;
1009
1010 croak ("unrequest_sigio");
1011 }
1012
1013 #endif /* _CX_UX */
1014 #endif /* STRIDE */
1015 #endif /* FASYNC */
1016 #endif /* F_SETFL */
1017 \f
1018 /* Saving and restoring the process group of Emacs's terminal. */
1019
1020 #ifdef BSD_PGRPS
1021
1022 /* The process group of which Emacs was a member when it initially
1023 started.
1024
1025 If Emacs was in its own process group (i.e. inherited_pgroup ==
1026 getpid ()), then we know we're running under a shell with job
1027 control (Emacs would never be run as part of a pipeline).
1028 Everything is fine.
1029
1030 If Emacs was not in its own process group, then we know we're
1031 running under a shell (or a caller) that doesn't know how to
1032 separate itself from Emacs (like sh). Emacs must be in its own
1033 process group in order to receive SIGIO correctly. In this
1034 situation, we put ourselves in our own pgroup, forcibly set the
1035 tty's pgroup to our pgroup, and make sure to restore and reinstate
1036 the tty's pgroup just like any other terminal setting. If
1037 inherited_group was not the tty's pgroup, then we'll get a
1038 SIGTTmumble when we try to change the tty's pgroup, and a CONT if
1039 it goes foreground in the future, which is what should happen. */
1040 int inherited_pgroup;
1041
1042 /* Split off the foreground process group to Emacs alone.
1043 When we are in the foreground, but not started in our own process
1044 group, redirect the TTY to point to our own process group. We need
1045 to be in our own process group to receive SIGIO properly. */
1046 void
1047 narrow_foreground_group ()
1048 {
1049 int me = getpid ();
1050
1051 setpgrp (0, inherited_pgroup);
1052 if (inherited_pgroup != me)
1053 EMACS_SET_TTY_PGRP (input_fd, &me);
1054 setpgrp (0, me);
1055 }
1056
1057 /* Set the tty to our original foreground group. */
1058 void
1059 widen_foreground_group ()
1060 {
1061 if (inherited_pgroup != getpid ())
1062 EMACS_SET_TTY_PGRP (input_fd, &inherited_pgroup);
1063 setpgrp (0, inherited_pgroup);
1064 }
1065
1066 #endif /* BSD_PGRPS */
1067 \f
1068 /* Getting and setting emacs_tty structures. */
1069
1070 /* Set *TC to the parameters associated with the terminal FD.
1071 Return zero if all's well, or -1 if we ran into an error we
1072 couldn't deal with. */
1073 int
1074 emacs_get_tty (fd, settings)
1075 int fd;
1076 struct emacs_tty *settings;
1077 {
1078 /* Retrieve the primary parameters - baud rate, character size, etcetera. */
1079 #ifdef HAVE_TCATTR
1080 /* We have those nifty POSIX tcmumbleattr functions. */
1081 bzero (&settings->main, sizeof (settings->main));
1082 if (tcgetattr (fd, &settings->main) < 0)
1083 return -1;
1084
1085 #else
1086 #ifdef HAVE_TERMIO
1087 /* The SYSV-style interface? */
1088 if (ioctl (fd, TCGETA, &settings->main) < 0)
1089 return -1;
1090
1091 #else
1092 #ifdef VMS
1093 /* Vehemently Monstrous System? :-) */
1094 if (! (SYS$QIOW (0, fd, IO$_SENSEMODE, settings, 0, 0,
1095 &settings->main.class, 12, 0, 0, 0, 0)
1096 & 1))
1097 return -1;
1098
1099 #else
1100 #ifndef DOS_NT
1101 /* I give up - I hope you have the BSD ioctls. */
1102 if (ioctl (fd, TIOCGETP, &settings->main) < 0)
1103 return -1;
1104 #endif /* not DOS_NT */
1105 #endif
1106 #endif
1107 #endif
1108
1109 /* Suivant - Do we have to get struct ltchars data? */
1110 #ifdef HAVE_LTCHARS
1111 if (ioctl (fd, TIOCGLTC, &settings->ltchars) < 0)
1112 return -1;
1113 #endif
1114
1115 /* How about a struct tchars and a wordful of lmode bits? */
1116 #ifdef HAVE_TCHARS
1117 if (ioctl (fd, TIOCGETC, &settings->tchars) < 0
1118 || ioctl (fd, TIOCLGET, &settings->lmode) < 0)
1119 return -1;
1120 #endif
1121
1122 /* We have survived the tempest. */
1123 return 0;
1124 }
1125
1126
1127 /* Set the parameters of the tty on FD according to the contents of
1128 *SETTINGS. If FLUSHP is non-zero, we discard input.
1129 Return 0 if all went well, and -1 if anything failed. */
1130
1131 int
1132 emacs_set_tty (fd, settings, flushp)
1133 int fd;
1134 struct emacs_tty *settings;
1135 int flushp;
1136 {
1137 /* Set the primary parameters - baud rate, character size, etcetera. */
1138 #ifdef HAVE_TCATTR
1139 int i;
1140 /* We have those nifty POSIX tcmumbleattr functions.
1141 William J. Smith <wjs@wiis.wang.com> writes:
1142 "POSIX 1003.1 defines tcsetattr() to return success if it was
1143 able to perform any of the requested actions, even if some
1144 of the requested actions could not be performed.
1145 We must read settings back to ensure tty setup properly.
1146 AIX requires this to keep tty from hanging occasionally." */
1147 /* This make sure that we don't loop indefinitely in here. */
1148 for (i = 0 ; i < 10 ; i++)
1149 if (tcsetattr (fd, flushp ? TCSAFLUSH : TCSADRAIN, &settings->main) < 0)
1150 {
1151 if (errno == EINTR)
1152 continue;
1153 else
1154 return -1;
1155 }
1156 else
1157 {
1158 struct termios new;
1159
1160 bzero (&new, sizeof (new));
1161 /* Get the current settings, and see if they're what we asked for. */
1162 tcgetattr (fd, &new);
1163 /* We cannot use memcmp on the whole structure here because under
1164 * aix386 the termios structure has some reserved field that may
1165 * not be filled in.
1166 */
1167 if ( new.c_iflag == settings->main.c_iflag
1168 && new.c_oflag == settings->main.c_oflag
1169 && new.c_cflag == settings->main.c_cflag
1170 && new.c_lflag == settings->main.c_lflag
1171 && memcmp(new.c_cc, settings->main.c_cc, NCCS) == 0)
1172 break;
1173 else
1174 continue;
1175 }
1176
1177 #else
1178 #ifdef HAVE_TERMIO
1179 /* The SYSV-style interface? */
1180 if (ioctl (fd, flushp ? TCSETAF : TCSETAW, &settings->main) < 0)
1181 return -1;
1182
1183 #else
1184 #ifdef VMS
1185 /* Vehemently Monstrous System? :-) */
1186 if (! (SYS$QIOW (0, fd, IO$_SETMODE, &input_iosb, 0, 0,
1187 &settings->main.class, 12, 0, 0, 0, 0)
1188 & 1))
1189 return -1;
1190
1191 #else
1192 #ifndef DOS_NT
1193 /* I give up - I hope you have the BSD ioctls. */
1194 if (ioctl (fd, (flushp) ? TIOCSETP : TIOCSETN, &settings->main) < 0)
1195 return -1;
1196 #endif /* not DOS_NT */
1197
1198 #endif
1199 #endif
1200 #endif
1201
1202 /* Suivant - Do we have to get struct ltchars data? */
1203 #ifdef HAVE_LTCHARS
1204 if (ioctl (fd, TIOCSLTC, &settings->ltchars) < 0)
1205 return -1;
1206 #endif
1207
1208 /* How about a struct tchars and a wordful of lmode bits? */
1209 #ifdef HAVE_TCHARS
1210 if (ioctl (fd, TIOCSETC, &settings->tchars) < 0
1211 || ioctl (fd, TIOCLSET, &settings->lmode) < 0)
1212 return -1;
1213 #endif
1214
1215 /* We have survived the tempest. */
1216 return 0;
1217 }
1218
1219 \f
1220 /* The initial tty mode bits */
1221 struct emacs_tty old_tty;
1222
1223 /* 1 if we have been through init_sys_modes. */
1224 int term_initted;
1225
1226 /* 1 if outer tty status has been recorded. */
1227 int old_tty_valid;
1228
1229 #ifdef BSD4_1
1230 /* BSD 4.1 needs to keep track of the lmode bits in order to start
1231 sigio. */
1232 int lmode;
1233 #endif
1234
1235 #ifndef F_SETOWN_BUG
1236 #ifdef F_SETOWN
1237 int old_fcntl_owner;
1238 #endif /* F_SETOWN */
1239 #endif /* F_SETOWN_BUG */
1240
1241 /* This may also be defined in stdio,
1242 but if so, this does no harm,
1243 and using the same name avoids wasting the other one's space. */
1244
1245 #ifdef nec_ews_svr4
1246 extern char *_sobuf ;
1247 #else
1248 #if defined (USG) || defined (DGUX)
1249 unsigned char _sobuf[BUFSIZ+8];
1250 #else
1251 char _sobuf[BUFSIZ];
1252 #endif
1253 #endif
1254
1255 #ifdef HAVE_LTCHARS
1256 static struct ltchars new_ltchars = {-1,-1,-1,-1,-1,-1};
1257 #endif
1258 #ifdef HAVE_TCHARS
1259 static struct tchars new_tchars = {-1,-1,-1,-1,-1,-1};
1260 #endif
1261
1262 void
1263 init_sys_modes ()
1264 {
1265 struct emacs_tty tty;
1266
1267 #ifdef VMS
1268 #if 0
1269 static int oob_chars[2] = {0, 1 << 7}; /* catch C-g's */
1270 extern int (*interrupt_signal) ();
1271 #endif
1272 #endif
1273
1274 Vtty_erase_char = Qnil;
1275
1276 if (noninteractive)
1277 return;
1278
1279 #ifdef VMS
1280 if (!input_ef)
1281 input_ef = get_kbd_event_flag ();
1282 /* LIB$GET_EF (&input_ef); */
1283 SYS$CLREF (input_ef);
1284 waiting_for_ast = 0;
1285 if (!timer_ef)
1286 timer_ef = get_timer_event_flag ();
1287 /* LIB$GET_EF (&timer_ef); */
1288 SYS$CLREF (timer_ef);
1289 #if 0
1290 if (!process_ef)
1291 {
1292 LIB$GET_EF (&process_ef);
1293 SYS$CLREF (process_ef);
1294 }
1295 if (input_ef / 32 != process_ef / 32)
1296 croak ("Input and process event flags in different clusters.");
1297 #endif
1298 if (input_ef / 32 != timer_ef / 32)
1299 croak ("Input and timer event flags in different clusters.");
1300 #if 0
1301 input_eflist = ((unsigned) 1 << (input_ef % 32)) |
1302 ((unsigned) 1 << (process_ef % 32));
1303 #endif
1304 timer_eflist = ((unsigned) 1 << (input_ef % 32)) |
1305 ((unsigned) 1 << (timer_ef % 32));
1306 #ifndef VMS4_4
1307 sys_access_reinit ();
1308 #endif
1309 #endif /* not VMS */
1310
1311 #ifdef BSD_PGRPS
1312 if (! read_socket_hook && EQ (Vwindow_system, Qnil))
1313 narrow_foreground_group ();
1314 #endif
1315
1316 #ifdef HAVE_WINDOW_SYSTEM
1317 /* Emacs' window system on MSDOG uses the `internal terminal' and therefore
1318 needs the initialization code below. */
1319 if (!read_socket_hook && EQ (Vwindow_system, Qnil))
1320 #endif
1321 {
1322 EMACS_GET_TTY (input_fd, &old_tty);
1323
1324 old_tty_valid = 1;
1325
1326 tty = old_tty;
1327
1328 #if defined (HAVE_TERMIO) || defined (HAVE_TERMIOS)
1329 XSETINT (Vtty_erase_char, old_tty.main.c_cc[VERASE]);
1330
1331 #ifdef DGUX
1332 /* This allows meta to be sent on 8th bit. */
1333 tty.main.c_iflag &= ~INPCK; /* don't check input for parity */
1334 #endif
1335 tty.main.c_iflag |= (IGNBRK); /* Ignore break condition */
1336 tty.main.c_iflag &= ~ICRNL; /* Disable map of CR to NL on input */
1337 #ifdef INLCR /* I'm just being cautious,
1338 since I can't check how widespread INLCR is--rms. */
1339 tty.main.c_iflag &= ~INLCR; /* Disable map of NL to CR on input */
1340 #endif
1341 #ifdef ISTRIP
1342 tty.main.c_iflag &= ~ISTRIP; /* don't strip 8th bit on input */
1343 #endif
1344 tty.main.c_lflag &= ~ECHO; /* Disable echo */
1345 tty.main.c_lflag &= ~ICANON; /* Disable erase/kill processing */
1346 #ifdef IEXTEN
1347 tty.main.c_lflag &= ~IEXTEN; /* Disable other editing characters. */
1348 #endif
1349 tty.main.c_lflag |= ISIG; /* Enable signals */
1350 if (flow_control)
1351 {
1352 tty.main.c_iflag |= IXON; /* Enable start/stop output control */
1353 #ifdef IXANY
1354 tty.main.c_iflag &= ~IXANY;
1355 #endif /* IXANY */
1356 }
1357 else
1358 tty.main.c_iflag &= ~IXON; /* Disable start/stop output control */
1359 tty.main.c_oflag &= ~ONLCR; /* Disable map of NL to CR-NL
1360 on output */
1361 tty.main.c_oflag &= ~TAB3; /* Disable tab expansion */
1362 #ifdef CS8
1363 if (meta_key)
1364 {
1365 tty.main.c_cflag |= CS8; /* allow 8th bit on input */
1366 tty.main.c_cflag &= ~PARENB;/* Don't check parity */
1367 }
1368 #endif
1369 tty.main.c_cc[VINTR] = quit_char; /* C-g (usually) gives SIGINT */
1370 /* Set up C-g for both SIGQUIT and SIGINT.
1371 We don't know which we will get, but we handle both alike
1372 so which one it really gives us does not matter. */
1373 tty.main.c_cc[VQUIT] = quit_char;
1374 tty.main.c_cc[VMIN] = 1; /* Input should wait for at least 1 char */
1375 tty.main.c_cc[VTIME] = 0; /* no matter how long that takes. */
1376 #ifdef VSWTCH
1377 tty.main.c_cc[VSWTCH] = CDISABLE; /* Turn off shell layering use
1378 of C-z */
1379 #endif /* VSWTCH */
1380
1381 #if defined (mips) || defined (HAVE_TCATTR)
1382 #ifdef VSUSP
1383 tty.main.c_cc[VSUSP] = CDISABLE; /* Turn off mips handling of C-z. */
1384 #endif /* VSUSP */
1385 #ifdef V_DSUSP
1386 tty.main.c_cc[V_DSUSP] = CDISABLE; /* Turn off mips handling of C-y. */
1387 #endif /* V_DSUSP */
1388 #ifdef VDSUSP /* Some systems have VDSUSP, some have V_DSUSP. */
1389 tty.main.c_cc[VDSUSP] = CDISABLE;
1390 #endif /* VDSUSP */
1391 #ifdef VLNEXT
1392 tty.main.c_cc[VLNEXT] = CDISABLE;
1393 #endif /* VLNEXT */
1394 #ifdef VREPRINT
1395 tty.main.c_cc[VREPRINT] = CDISABLE;
1396 #endif /* VREPRINT */
1397 #ifdef VWERASE
1398 tty.main.c_cc[VWERASE] = CDISABLE;
1399 #endif /* VWERASE */
1400 #ifdef VDISCARD
1401 tty.main.c_cc[VDISCARD] = CDISABLE;
1402 #endif /* VDISCARD */
1403
1404 if (flow_control)
1405 {
1406 #ifdef VSTART
1407 tty.main.c_cc[VSTART] = '\021';
1408 #endif /* VSTART */
1409 #ifdef VSTOP
1410 tty.main.c_cc[VSTOP] = '\023';
1411 #endif /* VSTOP */
1412 }
1413 else
1414 {
1415 #ifdef VSTART
1416 tty.main.c_cc[VSTART] = CDISABLE;
1417 #endif /* VSTART */
1418 #ifdef VSTOP
1419 tty.main.c_cc[VSTOP] = CDISABLE;
1420 #endif /* VSTOP */
1421 }
1422 #endif /* mips or HAVE_TCATTR */
1423
1424 #ifdef SET_LINE_DISCIPLINE
1425 /* Need to explicitly request TERMIODISC line discipline or
1426 Ultrix's termios does not work correctly. */
1427 tty.main.c_line = SET_LINE_DISCIPLINE;
1428 #endif
1429 #ifdef AIX
1430 #ifndef IBMR2AIX
1431 /* AIX enhanced edit loses NULs, so disable it. */
1432 tty.main.c_line = 0;
1433 tty.main.c_iflag &= ~ASCEDIT;
1434 #else
1435 tty.main.c_cc[VSTRT] = 255;
1436 tty.main.c_cc[VSTOP] = 255;
1437 tty.main.c_cc[VSUSP] = 255;
1438 tty.main.c_cc[VDSUSP] = 255;
1439 #endif /* IBMR2AIX */
1440 if (flow_control)
1441 {
1442 #ifdef VSTART
1443 tty.main.c_cc[VSTART] = '\021';
1444 #endif /* VSTART */
1445 #ifdef VSTOP
1446 tty.main.c_cc[VSTOP] = '\023';
1447 #endif /* VSTOP */
1448 }
1449 /* Also, PTY overloads NUL and BREAK.
1450 don't ignore break, but don't signal either, so it looks like NUL.
1451 This really serves a purpose only if running in an XTERM window
1452 or via TELNET or the like, but does no harm elsewhere. */
1453 tty.main.c_iflag &= ~IGNBRK;
1454 tty.main.c_iflag &= ~BRKINT;
1455 #endif
1456 #else /* if not HAVE_TERMIO */
1457 #ifdef VMS
1458 tty.main.tt_char |= TT$M_NOECHO;
1459 if (meta_key)
1460 tty.main.tt_char |= TT$M_EIGHTBIT;
1461 if (flow_control)
1462 tty.main.tt_char |= TT$M_TTSYNC;
1463 else
1464 tty.main.tt_char &= ~TT$M_TTSYNC;
1465 tty.main.tt2_char |= TT2$M_PASTHRU | TT2$M_XON;
1466 #else /* not VMS (BSD, that is) */
1467 #ifndef DOS_NT
1468 XSETINT (Vtty_erase_char, tty.main.sg_erase);
1469 tty.main.sg_flags &= ~(ECHO | CRMOD | XTABS);
1470 if (meta_key)
1471 tty.main.sg_flags |= ANYP;
1472 tty.main.sg_flags |= interrupt_input ? RAW : CBREAK;
1473 #endif /* not DOS_NT */
1474 #endif /* not VMS (BSD, that is) */
1475 #endif /* not HAVE_TERMIO */
1476
1477 /* If going to use CBREAK mode, we must request C-g to interrupt
1478 and turn off start and stop chars, etc. If not going to use
1479 CBREAK mode, do this anyway so as to turn off local flow
1480 control for user coming over network on 4.2; in this case,
1481 only t_stopc and t_startc really matter. */
1482 #ifndef HAVE_TERMIO
1483 #ifdef HAVE_TCHARS
1484 /* Note: if not using CBREAK mode, it makes no difference how we
1485 set this */
1486 tty.tchars = new_tchars;
1487 tty.tchars.t_intrc = quit_char;
1488 if (flow_control)
1489 {
1490 tty.tchars.t_startc = '\021';
1491 tty.tchars.t_stopc = '\023';
1492 }
1493
1494 tty.lmode = LDECCTQ | LLITOUT | LPASS8 | LNOFLSH | old_tty.lmode;
1495 #ifdef ultrix
1496 /* Under Ultrix 4.2a, leaving this out doesn't seem to hurt
1497 anything, and leaving it in breaks the meta key. Go figure. */
1498 tty.lmode &= ~LLITOUT;
1499 #endif
1500
1501 #ifdef BSD4_1
1502 lmode = tty.lmode;
1503 #endif
1504
1505 #endif /* HAVE_TCHARS */
1506 #endif /* not HAVE_TERMIO */
1507
1508 #ifdef HAVE_LTCHARS
1509 tty.ltchars = new_ltchars;
1510 #endif /* HAVE_LTCHARS */
1511 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida, MW Aug 1993 */
1512 if (!term_initted)
1513 internal_terminal_init ();
1514 dos_ttraw ();
1515 #endif
1516
1517 EMACS_SET_TTY (input_fd, &tty, 0);
1518
1519 /* This code added to insure that, if flow-control is not to be used,
1520 we have an unlocked terminal at the start. */
1521
1522 #ifdef TCXONC
1523 if (!flow_control) ioctl (input_fd, TCXONC, 1);
1524 #endif
1525 #ifndef APOLLO
1526 #ifdef TIOCSTART
1527 if (!flow_control) ioctl (input_fd, TIOCSTART, 0);
1528 #endif
1529 #endif
1530
1531 #if defined (HAVE_TERMIOS) || defined (HPUX9)
1532 #ifdef TCOON
1533 if (!flow_control) tcflow (input_fd, TCOON);
1534 #endif
1535 #endif
1536
1537 #ifdef AIXHFT
1538 hft_init ();
1539 #ifdef IBMR2AIX
1540 {
1541 /* IBM's HFT device usually thinks a ^J should be LF/CR. We need it
1542 to be only LF. This is the way that is done. */
1543 struct termio tty;
1544
1545 if (ioctl (1, HFTGETID, &tty) != -1)
1546 write (1, "\033[20l", 5);
1547 }
1548 #endif
1549 #endif /* AIXHFT */
1550
1551 #ifdef VMS
1552 /* Appears to do nothing when in PASTHRU mode.
1553 SYS$QIOW (0, input_fd, IO$_SETMODE|IO$M_OUTBAND, 0, 0, 0,
1554 interrupt_signal, oob_chars, 0, 0, 0, 0);
1555 */
1556 queue_kbd_input (0);
1557 #endif /* VMS */
1558 }
1559
1560 #ifdef F_SETFL
1561 #ifndef F_SETOWN_BUG
1562 #ifdef F_GETOWN /* F_SETFL does not imply existence of F_GETOWN */
1563 if (interrupt_input
1564 && ! read_socket_hook && EQ (Vwindow_system, Qnil))
1565 {
1566 old_fcntl_owner = fcntl (input_fd, F_GETOWN, 0);
1567 fcntl (input_fd, F_SETOWN, getpid ());
1568 init_sigio (input_fd);
1569 }
1570 #endif /* F_GETOWN */
1571 #endif /* F_SETOWN_BUG */
1572 #endif /* F_SETFL */
1573
1574 #ifdef BSD4_1
1575 if (interrupt_input)
1576 init_sigio (input_fd);
1577 #endif
1578
1579 #ifdef VMS /* VMS sometimes has this symbol but lacks setvbuf. */
1580 #undef _IOFBF
1581 #endif
1582 #ifdef _IOFBF
1583 /* This symbol is defined on recent USG systems.
1584 Someone says without this call USG won't really buffer the file
1585 even with a call to setbuf. */
1586 setvbuf (stdout, (char *) _sobuf, _IOFBF, sizeof _sobuf);
1587 #else
1588 setbuf (stdout, (char *) _sobuf);
1589 #endif
1590 #ifdef HAVE_WINDOW_SYSTEM
1591 /* Emacs' window system on MSDOG uses the `internal terminal' and therefore
1592 needs the initialization code below. */
1593 if (EQ (Vwindow_system, Qnil)
1594 #ifndef WINDOWSNT
1595 /* When running in tty mode on NT/Win95, we have a read_socket
1596 hook, but still need the rest of the initialization code below. */
1597 && (! read_socket_hook)
1598 #endif
1599 )
1600 #endif
1601 set_terminal_modes ();
1602
1603 if (!term_initted
1604 && FRAMEP (Vterminal_frame)
1605 && FRAME_TERMCAP_P (XFRAME (Vterminal_frame)))
1606 init_frame_faces (XFRAME (Vterminal_frame));
1607
1608 if (term_initted && no_redraw_on_reenter)
1609 {
1610 if (display_completed)
1611 direct_output_forward_char (0);
1612 }
1613 else
1614 {
1615 frame_garbaged = 1;
1616 if (FRAMEP (Vterminal_frame))
1617 FRAME_GARBAGED_P (XFRAME (Vterminal_frame)) = 1;
1618 }
1619
1620 term_initted = 1;
1621 }
1622
1623 /* Return nonzero if safe to use tabs in output.
1624 At the time this is called, init_sys_modes has not been done yet. */
1625
1626 int
1627 tabs_safe_p ()
1628 {
1629 struct emacs_tty tty;
1630
1631 EMACS_GET_TTY (input_fd, &tty);
1632 return EMACS_TTY_TABS_OK (&tty);
1633 }
1634 \f
1635 /* Get terminal size from system.
1636 Store number of lines into *HEIGHTP and width into *WIDTHP.
1637 We store 0 if there's no valid information. */
1638
1639 void
1640 get_frame_size (widthp, heightp)
1641 int *widthp, *heightp;
1642 {
1643
1644 #ifdef TIOCGWINSZ
1645
1646 /* BSD-style. */
1647 struct winsize size;
1648
1649 if (ioctl (input_fd, TIOCGWINSZ, &size) == -1)
1650 *widthp = *heightp = 0;
1651 else
1652 {
1653 *widthp = size.ws_col;
1654 *heightp = size.ws_row;
1655 }
1656
1657 #else
1658 #ifdef TIOCGSIZE
1659
1660 /* SunOS - style. */
1661 struct ttysize size;
1662
1663 if (ioctl (input_fd, TIOCGSIZE, &size) == -1)
1664 *widthp = *heightp = 0;
1665 else
1666 {
1667 *widthp = size.ts_cols;
1668 *heightp = size.ts_lines;
1669 }
1670
1671 #else
1672 #ifdef VMS
1673
1674 struct sensemode tty;
1675
1676 SYS$QIOW (0, input_fd, IO$_SENSEMODE, &tty, 0, 0,
1677 &tty.class, 12, 0, 0, 0, 0);
1678 *widthp = tty.scr_wid;
1679 *heightp = tty.scr_len;
1680
1681 #else
1682 #ifdef MSDOS
1683 *widthp = ScreenCols ();
1684 *heightp = ScreenRows ();
1685 #else /* system doesn't know size */
1686 *widthp = 0;
1687 *heightp = 0;
1688 #endif
1689
1690 #endif /* not VMS */
1691 #endif /* not SunOS-style */
1692 #endif /* not BSD-style */
1693 }
1694
1695 /* Set the logical window size associated with descriptor FD
1696 to HEIGHT and WIDTH. This is used mainly with ptys. */
1697
1698 int
1699 set_window_size (fd, height, width)
1700 int fd, height, width;
1701 {
1702 #ifdef TIOCSWINSZ
1703
1704 /* BSD-style. */
1705 struct winsize size;
1706 size.ws_row = height;
1707 size.ws_col = width;
1708
1709 if (ioctl (fd, TIOCSWINSZ, &size) == -1)
1710 return 0; /* error */
1711 else
1712 return 1;
1713
1714 #else
1715 #ifdef TIOCSSIZE
1716
1717 /* SunOS - style. */
1718 struct ttysize size;
1719 size.ts_lines = height;
1720 size.ts_cols = width;
1721
1722 if (ioctl (fd, TIOCGSIZE, &size) == -1)
1723 return 0;
1724 else
1725 return 1;
1726 #else
1727 return -1;
1728 #endif /* not SunOS-style */
1729 #endif /* not BSD-style */
1730 }
1731
1732 \f
1733 /* Prepare the terminal for exiting Emacs; move the cursor to the
1734 bottom of the frame, turn off interrupt-driven I/O, etc. */
1735 void
1736 reset_sys_modes ()
1737 {
1738 if (noninteractive)
1739 {
1740 fflush (stdout);
1741 return;
1742 }
1743 if (!term_initted)
1744 return;
1745 #ifdef HAVE_WINDOW_SYSTEM
1746 /* Emacs' window system on MSDOG uses the `internal terminal' and therefore
1747 needs the clean-up code below. */
1748 if (!EQ (Vwindow_system, Qnil)
1749 #ifndef WINDOWSNT
1750 /* When running in tty mode on NT/Win95, we have a read_socket
1751 hook, but still need the rest of the clean-up code below. */
1752 || read_socket_hook
1753 #endif
1754 )
1755 return;
1756 #endif
1757 cursor_to (FRAME_HEIGHT (selected_frame) - 1, 0);
1758 clear_end_of_line (FRAME_WIDTH (selected_frame));
1759 /* clear_end_of_line may move the cursor */
1760 cursor_to (FRAME_HEIGHT (selected_frame) - 1, 0);
1761 #if defined (IBMR2AIX) && defined (AIXHFT)
1762 {
1763 /* HFT devices normally use ^J as a LF/CR. We forced it to
1764 do the LF only. Now, we need to reset it. */
1765 struct termio tty;
1766
1767 if (ioctl (1, HFTGETID, &tty) != -1)
1768 write (1, "\033[20h", 5);
1769 }
1770 #endif
1771
1772 reset_terminal_modes ();
1773 fflush (stdout);
1774 #ifdef BSD_SYSTEM
1775 #ifndef BSD4_1
1776 /* Avoid possible loss of output when changing terminal modes. */
1777 fsync (fileno (stdout));
1778 #endif
1779 #endif
1780
1781 #ifdef F_SETFL
1782 #ifndef F_SETOWN_BUG
1783 #ifdef F_SETOWN /* F_SETFL does not imply existence of F_SETOWN */
1784 if (interrupt_input)
1785 {
1786 reset_sigio ();
1787 fcntl (input_fd, F_SETOWN, old_fcntl_owner);
1788 }
1789 #endif /* F_SETOWN */
1790 #endif /* F_SETOWN_BUG */
1791 #ifdef O_NDELAY
1792 fcntl (input_fd, F_SETFL, fcntl (input_fd, F_GETFL, 0) & ~O_NDELAY);
1793 #endif
1794 #endif /* F_SETFL */
1795 #ifdef BSD4_1
1796 if (interrupt_input)
1797 reset_sigio ();
1798 #endif /* BSD4_1 */
1799
1800 if (old_tty_valid)
1801 while (EMACS_SET_TTY (input_fd, &old_tty, 0) < 0 && errno == EINTR)
1802 ;
1803
1804 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */
1805 dos_ttcooked ();
1806 #endif
1807
1808 #ifdef SET_LINE_DISCIPLINE
1809 /* Ultrix's termios *ignores* any line discipline except TERMIODISC.
1810 A different old line discipline is therefore not restored, yet.
1811 Restore the old line discipline by hand. */
1812 ioctl (0, TIOCSETD, &old_tty.main.c_line);
1813 #endif
1814
1815 #ifdef AIXHFT
1816 hft_reset ();
1817 #endif
1818
1819 #ifdef BSD_PGRPS
1820 widen_foreground_group ();
1821 #endif
1822 }
1823 \f
1824 #ifdef HAVE_PTYS
1825
1826 /* Set up the proper status flags for use of a pty. */
1827
1828 void
1829 setup_pty (fd)
1830 int fd;
1831 {
1832 /* I'm told that TOICREMOTE does not mean control chars
1833 "can't be sent" but rather that they don't have
1834 input-editing or signaling effects.
1835 That should be good, because we have other ways
1836 to do those things in Emacs.
1837 However, telnet mode seems not to work on 4.2.
1838 So TIOCREMOTE is turned off now. */
1839
1840 /* Under hp-ux, if TIOCREMOTE is turned on, some calls
1841 will hang. In particular, the "timeout" feature (which
1842 causes a read to return if there is no data available)
1843 does this. Also it is known that telnet mode will hang
1844 in such a way that Emacs must be stopped (perhaps this
1845 is the same problem).
1846
1847 If TIOCREMOTE is turned off, then there is a bug in
1848 hp-ux which sometimes loses data. Apparently the
1849 code which blocks the master process when the internal
1850 buffer fills up does not work. Other than this,
1851 though, everything else seems to work fine.
1852
1853 Since the latter lossage is more benign, we may as well
1854 lose that way. -- cph */
1855 #ifdef FIONBIO
1856 #ifdef SYSV_PTYS
1857 {
1858 int on = 1;
1859 ioctl (fd, FIONBIO, &on);
1860 }
1861 #endif
1862 #endif
1863 #ifdef IBMRTAIX
1864 /* On AIX, the parent gets SIGHUP when a pty attached child dies. So, we */
1865 /* ignore SIGHUP once we've started a child on a pty. Note that this may */
1866 /* cause EMACS not to die when it should, i.e., when its own controlling */
1867 /* tty goes away. I've complained to the AIX developers, and they may */
1868 /* change this behavior, but I'm not going to hold my breath. */
1869 signal (SIGHUP, SIG_IGN);
1870 #endif
1871 }
1872 #endif /* HAVE_PTYS */
1873 \f
1874 #ifdef VMS
1875
1876 /* Assigning an input channel is done at the start of Emacs execution.
1877 This is called each time Emacs is resumed, also, but does nothing
1878 because input_chain is no longer zero. */
1879
1880 void
1881 init_vms_input ()
1882 {
1883 int status;
1884
1885 if (input_fd == 0)
1886 {
1887 status = SYS$ASSIGN (&input_dsc, &input_fd, 0, 0);
1888 if (! (status & 1))
1889 LIB$STOP (status);
1890 }
1891 }
1892
1893 /* Deassigning the input channel is done before exiting. */
1894
1895 void
1896 stop_vms_input ()
1897 {
1898 return SYS$DASSGN (input_fd);
1899 }
1900
1901 short input_buffer;
1902
1903 /* Request reading one character into the keyboard buffer.
1904 This is done as soon as the buffer becomes empty. */
1905
1906 void
1907 queue_kbd_input ()
1908 {
1909 int status;
1910 extern kbd_input_ast ();
1911
1912 waiting_for_ast = 0;
1913 stop_input = 0;
1914 status = SYS$QIO (0, input_fd, IO$_READVBLK,
1915 &input_iosb, kbd_input_ast, 1,
1916 &input_buffer, 1, 0, terminator_mask, 0, 0);
1917 }
1918
1919 int input_count;
1920
1921 /* Ast routine that is called when keyboard input comes in
1922 in accord with the SYS$QIO above. */
1923
1924 void
1925 kbd_input_ast ()
1926 {
1927 register int c = -1;
1928 int old_errno = errno;
1929 extern EMACS_TIME *input_available_clear_time;
1930
1931 if (waiting_for_ast)
1932 SYS$SETEF (input_ef);
1933 waiting_for_ast = 0;
1934 input_count++;
1935 #ifdef ASTDEBUG
1936 if (input_count == 25)
1937 exit (1);
1938 printf ("Ast # %d,", input_count);
1939 printf (" iosb = %x, %x, %x, %x",
1940 input_iosb.offset, input_iosb.status, input_iosb.termlen,
1941 input_iosb.term);
1942 #endif
1943 if (input_iosb.offset)
1944 {
1945 c = input_buffer;
1946 #ifdef ASTDEBUG
1947 printf (", char = 0%o", c);
1948 #endif
1949 }
1950 #ifdef ASTDEBUG
1951 printf ("\n");
1952 fflush (stdout);
1953 sleep (1);
1954 #endif
1955 if (! stop_input)
1956 queue_kbd_input ();
1957 if (c >= 0)
1958 {
1959 struct input_event e;
1960 e.kind = ascii_keystroke;
1961 XSETINT (e.code, c);
1962 XSETFRAME (e.frame_or_window, selected_frame);
1963 kbd_buffer_store_event (&e);
1964 }
1965 if (input_available_clear_time)
1966 EMACS_SET_SECS_USECS (*input_available_clear_time, 0, 0);
1967 errno = old_errno;
1968 }
1969
1970 /* Wait until there is something in kbd_buffer. */
1971
1972 void
1973 wait_for_kbd_input ()
1974 {
1975 extern int have_process_input, process_exited;
1976
1977 /* If already something, avoid doing system calls. */
1978 if (detect_input_pending ())
1979 {
1980 return;
1981 }
1982 /* Clear a flag, and tell ast routine above to set it. */
1983 SYS$CLREF (input_ef);
1984 waiting_for_ast = 1;
1985 /* Check for timing error: ast happened while we were doing that. */
1986 if (!detect_input_pending ())
1987 {
1988 /* No timing error: wait for flag to be set. */
1989 set_waiting_for_input (0);
1990 SYS$WFLOR (input_ef, input_eflist);
1991 clear_waiting_for_input (0);
1992 if (!detect_input_pending ())
1993 /* Check for subprocess input availability */
1994 {
1995 int dsp = have_process_input || process_exited;
1996
1997 SYS$CLREF (process_ef);
1998 if (have_process_input)
1999 process_command_input ();
2000 if (process_exited)
2001 process_exit ();
2002 if (dsp)
2003 {
2004 update_mode_lines++;
2005 prepare_menu_bars ();
2006 redisplay_preserve_echo_area ();
2007 }
2008 }
2009 }
2010 waiting_for_ast = 0;
2011 }
2012
2013 /* Get rid of any pending QIO, when we are about to suspend
2014 or when we want to throw away pending input.
2015 We wait for a positive sign that the AST routine has run
2016 and therefore there is no I/O request queued when we return.
2017 SYS$SETAST is used to avoid a timing error. */
2018
2019 void
2020 end_kbd_input ()
2021 {
2022 #ifdef ASTDEBUG
2023 printf ("At end_kbd_input.\n");
2024 fflush (stdout);
2025 sleep (1);
2026 #endif
2027 if (LIB$AST_IN_PROG ()) /* Don't wait if suspending from kbd_buffer_store_event! */
2028 {
2029 SYS$CANCEL (input_fd);
2030 return;
2031 }
2032
2033 SYS$SETAST (0);
2034 /* Clear a flag, and tell ast routine above to set it. */
2035 SYS$CLREF (input_ef);
2036 waiting_for_ast = 1;
2037 stop_input = 1;
2038 SYS$CANCEL (input_fd);
2039 SYS$SETAST (1);
2040 SYS$WAITFR (input_ef);
2041 waiting_for_ast = 0;
2042 }
2043
2044 /* Wait for either input available or time interval expiry. */
2045
2046 void
2047 input_wait_timeout (timeval)
2048 int timeval; /* Time to wait, in seconds */
2049 {
2050 int time [2];
2051 static int zero = 0;
2052 static int large = -10000000;
2053
2054 LIB$EMUL (&timeval, &large, &zero, time); /* Convert to VMS format */
2055
2056 /* If already something, avoid doing system calls. */
2057 if (detect_input_pending ())
2058 {
2059 return;
2060 }
2061 /* Clear a flag, and tell ast routine above to set it. */
2062 SYS$CLREF (input_ef);
2063 waiting_for_ast = 1;
2064 /* Check for timing error: ast happened while we were doing that. */
2065 if (!detect_input_pending ())
2066 {
2067 /* No timing error: wait for flag to be set. */
2068 SYS$CANTIM (1, 0);
2069 if (SYS$SETIMR (timer_ef, time, 0, 1) & 1) /* Set timer */
2070 SYS$WFLOR (timer_ef, timer_eflist); /* Wait for timer expiry or input */
2071 }
2072 waiting_for_ast = 0;
2073 }
2074
2075 /* The standard `sleep' routine works some other way
2076 and it stops working if you have ever quit out of it.
2077 This one continues to work. */
2078
2079 sys_sleep (timeval)
2080 int timeval;
2081 {
2082 int time [2];
2083 static int zero = 0;
2084 static int large = -10000000;
2085
2086 LIB$EMUL (&timeval, &large, &zero, time); /* Convert to VMS format */
2087
2088 SYS$CANTIM (1, 0);
2089 if (SYS$SETIMR (timer_ef, time, 0, 1) & 1) /* Set timer */
2090 SYS$WAITFR (timer_ef); /* Wait for timer expiry only */
2091 }
2092
2093 void
2094 init_sigio (fd)
2095 int fd;
2096 {
2097 request_sigio ();
2098 }
2099
2100 reset_sigio ()
2101 {
2102 unrequest_sigio ();
2103 }
2104
2105 void
2106 request_sigio ()
2107 {
2108 croak ("request sigio");
2109 }
2110
2111 void
2112 unrequest_sigio ()
2113 {
2114 croak ("unrequest sigio");
2115 }
2116
2117 #endif /* VMS */
2118 \f
2119 /* Note that VMS compiler won't accept defined (CANNOT_DUMP). */
2120 #ifndef CANNOT_DUMP
2121 #define NEED_STARTS
2122 #endif
2123
2124 #ifndef SYSTEM_MALLOC
2125 #ifndef NEED_STARTS
2126 #define NEED_STARTS
2127 #endif
2128 #endif
2129
2130 #ifdef NEED_STARTS
2131 /* Some systems that cannot dump also cannot implement these. */
2132
2133 /*
2134 * Return the address of the start of the text segment prior to
2135 * doing an unexec. After unexec the return value is undefined.
2136 * See crt0.c for further explanation and _start.
2137 *
2138 */
2139
2140 #ifndef HAVE_TEXT_START
2141 char *
2142 start_of_text ()
2143 {
2144 #ifdef TEXT_START
2145 return ((char *) TEXT_START);
2146 #else
2147 #ifdef GOULD
2148 extern csrt ();
2149 return ((char *) csrt);
2150 #else /* not GOULD */
2151 extern int _start ();
2152 return ((char *) _start);
2153 #endif /* GOULD */
2154 #endif /* TEXT_START */
2155 }
2156 #endif /* not HAVE_TEXT_START */
2157
2158 /*
2159 * Return the address of the start of the data segment prior to
2160 * doing an unexec. After unexec the return value is undefined.
2161 * See crt0.c for further information and definition of data_start.
2162 *
2163 * Apparently, on BSD systems this is etext at startup. On
2164 * USG systems (swapping) this is highly mmu dependent and
2165 * is also dependent on whether or not the program is running
2166 * with shared text. Generally there is a (possibly large)
2167 * gap between end of text and start of data with shared text.
2168 *
2169 * On Uniplus+ systems with shared text, data starts at a
2170 * fixed address. Each port (from a given oem) is generally
2171 * different, and the specific value of the start of data can
2172 * be obtained via the UniPlus+ specific "uvar" system call,
2173 * however the method outlined in crt0.c seems to be more portable.
2174 *
2175 * Probably what will have to happen when a USG unexec is available,
2176 * at least on UniPlus, is temacs will have to be made unshared so
2177 * that text and data are contiguous. Then once loadup is complete,
2178 * unexec will produce a shared executable where the data can be
2179 * at the normal shared text boundary and the startofdata variable
2180 * will be patched by unexec to the correct value.
2181 *
2182 */
2183
2184 char *
2185 start_of_data ()
2186 {
2187 #ifdef DATA_START
2188 return ((char *) DATA_START);
2189 #else
2190 #ifdef ORDINARY_LINK
2191 /*
2192 * This is a hack. Since we're not linking crt0.c or pre_crt0.c,
2193 * data_start isn't defined. We take the address of environ, which
2194 * is known to live at or near the start of the system crt0.c, and
2195 * we don't sweat the handful of bytes that might lose.
2196 */
2197 extern char **environ;
2198
2199 return((char *) &environ);
2200 #else
2201 extern int data_start;
2202 return ((char *) &data_start);
2203 #endif /* ORDINARY_LINK */
2204 #endif /* DATA_START */
2205 }
2206 #endif /* NEED_STARTS (not CANNOT_DUMP or not SYSTEM_MALLOC) */
2207
2208 #ifndef CANNOT_DUMP
2209 /* Some systems that cannot dump also cannot implement these. */
2210
2211 /*
2212 * Return the address of the end of the text segment prior to
2213 * doing an unexec. After unexec the return value is undefined.
2214 */
2215
2216 char *
2217 end_of_text ()
2218 {
2219 #ifdef TEXT_END
2220 return ((char *) TEXT_END);
2221 #else
2222 extern int etext;
2223 return ((char *) &etext);
2224 #endif
2225 }
2226
2227 /*
2228 * Return the address of the end of the data segment prior to
2229 * doing an unexec. After unexec the return value is undefined.
2230 */
2231
2232 char *
2233 end_of_data ()
2234 {
2235 #ifdef DATA_END
2236 return ((char *) DATA_END);
2237 #else
2238 extern int edata;
2239 return ((char *) &edata);
2240 #endif
2241 }
2242
2243 #endif /* not CANNOT_DUMP */
2244 \f
2245 /* init_system_name sets up the string for the Lisp function
2246 system-name to return. */
2247
2248 #ifdef BSD4_1
2249 #include <whoami.h>
2250 #endif
2251
2252 extern Lisp_Object Vsystem_name;
2253
2254 #ifndef BSD4_1
2255 #ifndef VMS
2256 #ifdef HAVE_SOCKETS
2257 #include <sys/socket.h>
2258 #include <netdb.h>
2259 #endif /* HAVE_SOCKETS */
2260 #endif /* not VMS */
2261 #endif /* not BSD4_1 */
2262
2263 void
2264 init_system_name ()
2265 {
2266 #ifdef BSD4_1
2267 Vsystem_name = build_string (sysname);
2268 #else
2269 #ifdef VMS
2270 char *sp, *end;
2271 if ((sp = egetenv ("SYS$NODE")) == 0)
2272 Vsystem_name = build_string ("vax-vms");
2273 else if ((end = index (sp, ':')) == 0)
2274 Vsystem_name = build_string (sp);
2275 else
2276 Vsystem_name = make_string (sp, end - sp);
2277 #else
2278 #ifndef HAVE_GETHOSTNAME
2279 struct utsname uts;
2280 uname (&uts);
2281 Vsystem_name = build_string (uts.nodename);
2282 #else /* HAVE_GETHOSTNAME */
2283 unsigned int hostname_size = 256;
2284 char *hostname = (char *) alloca (hostname_size);
2285
2286 /* Try to get the host name; if the buffer is too short, try
2287 again. Apparently, the only indication gethostname gives of
2288 whether the buffer was large enough is the presence or absence
2289 of a '\0' in the string. Eech. */
2290 for (;;)
2291 {
2292 gethostname (hostname, hostname_size - 1);
2293 hostname[hostname_size - 1] = '\0';
2294
2295 /* Was the buffer large enough for the '\0'? */
2296 if (strlen (hostname) < hostname_size - 1)
2297 break;
2298
2299 hostname_size <<= 1;
2300 hostname = (char *) alloca (hostname_size);
2301 }
2302 #ifdef HAVE_SOCKETS
2303 /* Turn the hostname into the official, fully-qualified hostname.
2304 Don't do this if we're going to dump; this can confuse system
2305 libraries on some machines and make the dumped emacs core dump. */
2306 #ifndef CANNOT_DUMP
2307 if (initialized)
2308 #endif /* not CANNOT_DUMP */
2309 if (! index (hostname, '.'))
2310 {
2311 struct hostent *hp;
2312 int count;
2313 for (count = 0;; count++)
2314 {
2315 #ifdef TRY_AGAIN
2316 h_errno = 0;
2317 #endif
2318 hp = gethostbyname (hostname);
2319 #ifdef TRY_AGAIN
2320 if (! (hp == 0 && h_errno == TRY_AGAIN))
2321 #endif
2322 break;
2323 if (count >= 5)
2324 break;
2325 Fsleep_for (make_number (1), Qnil);
2326 }
2327 if (hp)
2328 {
2329 char *fqdn = (char *) hp->h_name;
2330 char *p;
2331
2332 if (!index (fqdn, '.'))
2333 {
2334 /* We still don't have a fully qualified domain name.
2335 Try to find one in the list of alternate names */
2336 char **alias = hp->h_aliases;
2337 while (*alias && !index (*alias, '.'))
2338 alias++;
2339 if (*alias)
2340 fqdn = *alias;
2341 }
2342 hostname = fqdn;
2343 #if 0
2344 /* Convert the host name to lower case. */
2345 /* Using ctype.h here would introduce a possible locale
2346 dependence that is probably wrong for hostnames. */
2347 p = hostname;
2348 while (*p)
2349 {
2350 if (*p >= 'A' && *p <= 'Z')
2351 *p += 'a' - 'A';
2352 p++;
2353 }
2354 #endif
2355 }
2356 }
2357 #endif /* HAVE_SOCKETS */
2358 /* We used to try using getdomainname here,
2359 but NIIBE Yutaka <gniibe@etl.go.jp> says that
2360 getdomainname gets the NIS/YP domain which often is not the same
2361 as in Internet domain name. */
2362 #if 0 /* Turned off because sysinfo is not really likely to return the
2363 correct Internet domain. */
2364 #if (HAVE_SYSINFO && defined (SI_SRPC_DOMAIN))
2365 if (! index (hostname, '.'))
2366 {
2367 /* The hostname is not fully qualified. Append the domain name. */
2368
2369 int hostlen = strlen (hostname);
2370 int domain_size = 256;
2371
2372 for (;;)
2373 {
2374 char *domain = (char *) alloca (domain_size + 1);
2375 char *fqdn = (char *) alloca (hostlen + 1 + domain_size + 1);
2376 int sys_domain_size = sysinfo (SI_SRPC_DOMAIN, domain, domain_size);
2377 if (sys_domain_size <= 0)
2378 break;
2379 if (domain_size < sys_domain_size)
2380 {
2381 domain_size = sys_domain_size;
2382 continue;
2383 }
2384 strcpy (fqdn, hostname);
2385 if (domain[0] == '.')
2386 strcpy (fqdn + hostlen, domain);
2387 else if (domain[0] != 0)
2388 {
2389 fqdn[hostlen] = '.';
2390 strcpy (fqdn + hostlen + 1, domain);
2391 }
2392 hostname = fqdn;
2393 break;
2394 }
2395 }
2396 #endif /* HAVE_SYSINFO && defined (SI_SRPC_DOMAIN) */
2397 #endif /* 0 */
2398 Vsystem_name = build_string (hostname);
2399 #endif /* HAVE_GETHOSTNAME */
2400 #endif /* VMS */
2401 #endif /* BSD4_1 */
2402 {
2403 unsigned char *p;
2404 for (p = XSTRING (Vsystem_name)->data; *p; p++)
2405 if (*p == ' ' || *p == '\t')
2406 *p = '-';
2407 }
2408 }
2409 \f
2410 #ifndef MSDOS
2411 #ifndef VMS
2412 #if !defined (HAVE_SELECT) || defined (BROKEN_SELECT_NON_X)
2413
2414 #include "sysselect.h"
2415 #undef select
2416
2417 #if defined (HAVE_X_WINDOWS) && !defined (HAVE_SELECT)
2418 /* Cause explanatory error message at compile time,
2419 since the select emulation is not good enough for X. */
2420 int *x = &x_windows_lose_if_no_select_system_call;
2421 #endif
2422
2423 /* Emulate as much as select as is possible under 4.1 and needed by Gnu Emacs
2424 * Only checks read descriptors.
2425 */
2426 /* How long to wait between checking fds in select */
2427 #define SELECT_PAUSE 1
2428 int select_alarmed;
2429
2430 /* For longjmp'ing back to read_input_waiting. */
2431
2432 jmp_buf read_alarm_throw;
2433
2434 /* Nonzero if the alarm signal should throw back to read_input_waiting.
2435 The read_socket_hook function sets this to 1 while it is waiting. */
2436
2437 int read_alarm_should_throw;
2438
2439 SIGTYPE
2440 select_alarm ()
2441 {
2442 select_alarmed = 1;
2443 #ifdef BSD4_1
2444 sigrelse (SIGALRM);
2445 #else /* not BSD4_1 */
2446 signal (SIGALRM, SIG_IGN);
2447 #endif /* not BSD4_1 */
2448 if (read_alarm_should_throw)
2449 longjmp (read_alarm_throw, 1);
2450 }
2451
2452 #ifndef WINDOWSNT
2453 /* Only rfds are checked. */
2454 int
2455 sys_select (nfds, rfds, wfds, efds, timeout)
2456 int nfds;
2457 SELECT_TYPE *rfds, *wfds, *efds;
2458 EMACS_TIME *timeout;
2459 {
2460 int ravail = 0, old_alarm;
2461 SELECT_TYPE orfds;
2462 int timeoutval;
2463 int *local_timeout;
2464 extern int proc_buffered_char[];
2465 #ifndef subprocesses
2466 int process_tick = 0, update_tick = 0;
2467 #else
2468 extern int process_tick, update_tick;
2469 #endif
2470 SIGTYPE (*old_trap) ();
2471 unsigned char buf;
2472
2473 #if defined (HAVE_SELECT) && defined (HAVE_X_WINDOWS)
2474 /* If we're using X, then the native select will work; we only need the
2475 emulation for non-X usage. */
2476 if (!NILP (Vwindow_system))
2477 return select (nfds, rfds, wfds, efds, timeout);
2478 #endif
2479 timeoutval = timeout ? EMACS_SECS (*timeout) : 100000;
2480 local_timeout = &timeoutval;
2481 FD_ZERO (&orfds);
2482 if (rfds)
2483 {
2484 orfds = *rfds;
2485 FD_ZERO (rfds);
2486 }
2487 if (wfds)
2488 FD_ZERO (wfds);
2489 if (efds)
2490 FD_ZERO (efds);
2491
2492 /* If we are looking only for the terminal, with no timeout,
2493 just read it and wait -- that's more efficient. */
2494 if (*local_timeout == 100000 && process_tick == update_tick
2495 && FD_ISSET (0, &orfds))
2496 {
2497 int fd;
2498 for (fd = 1; fd < nfds; ++fd)
2499 if (FD_ISSET (fd, &orfds))
2500 goto hardway;
2501 if (! detect_input_pending ())
2502 read_input_waiting ();
2503 FD_SET (0, rfds);
2504 return 1;
2505 }
2506
2507 hardway:
2508 /* Once a second, till the timer expires, check all the flagged read
2509 * descriptors to see if any input is available. If there is some then
2510 * set the corresponding bit in the return copy of rfds.
2511 */
2512 while (1)
2513 {
2514 register int to_check, fd;
2515
2516 if (rfds)
2517 {
2518 for (to_check = nfds, fd = 0; --to_check >= 0; fd++)
2519 {
2520 if (FD_ISSET (fd, &orfds))
2521 {
2522 int avail = 0, status = 0;
2523
2524 if (fd == 0)
2525 avail = detect_input_pending (); /* Special keyboard handler */
2526 else
2527 {
2528 #ifdef FIONREAD
2529 status = ioctl (fd, FIONREAD, &avail);
2530 #else /* no FIONREAD */
2531 /* Hoping it will return -1 if nothing available
2532 or 0 if all 0 chars requested are read. */
2533 if (proc_buffered_char[fd] >= 0)
2534 avail = 1;
2535 else
2536 {
2537 avail = read (fd, &buf, 1);
2538 if (avail > 0)
2539 proc_buffered_char[fd] = buf;
2540 }
2541 #endif /* no FIONREAD */
2542 }
2543 if (status >= 0 && avail > 0)
2544 {
2545 FD_SET (fd, rfds);
2546 ravail++;
2547 }
2548 }
2549 }
2550 }
2551 if (*local_timeout == 0 || ravail != 0 || process_tick != update_tick)
2552 break;
2553 old_alarm = alarm (0);
2554 old_trap = signal (SIGALRM, select_alarm);
2555 select_alarmed = 0;
2556 alarm (SELECT_PAUSE);
2557 /* Wait for a SIGALRM (or maybe a SIGTINT) */
2558 while (select_alarmed == 0 && *local_timeout != 0
2559 && process_tick == update_tick)
2560 {
2561 /* If we are interested in terminal input,
2562 wait by reading the terminal.
2563 That makes instant wakeup for terminal input at least. */
2564 if (FD_ISSET (0, &orfds))
2565 {
2566 read_input_waiting ();
2567 if (detect_input_pending ())
2568 select_alarmed = 1;
2569 }
2570 else
2571 pause ();
2572 }
2573 (*local_timeout) -= SELECT_PAUSE;
2574 /* Reset the old alarm if there was one */
2575 alarm (0);
2576 signal (SIGALRM, old_trap);
2577 if (old_alarm != 0)
2578 {
2579 /* Reset or forge an interrupt for the original handler. */
2580 old_alarm -= SELECT_PAUSE;
2581 if (old_alarm <= 0)
2582 kill (getpid (), SIGALRM); /* Fake an alarm with the orig' handler */
2583 else
2584 alarm (old_alarm);
2585 }
2586 if (*local_timeout == 0) /* Stop on timer being cleared */
2587 break;
2588 }
2589 return ravail;
2590 }
2591 #endif /* not WINDOWSNT */
2592
2593 /* Read keyboard input into the standard buffer,
2594 waiting for at least one character. */
2595
2596 /* Make all keyboard buffers much bigger when using a window system. */
2597 #ifdef HAVE_WINDOW_SYSTEM
2598 #define BUFFER_SIZE_FACTOR 16
2599 #else
2600 #define BUFFER_SIZE_FACTOR 1
2601 #endif
2602
2603 void
2604 read_input_waiting ()
2605 {
2606 struct input_event e;
2607 int nread, i;
2608 extern int quit_char;
2609
2610 if (read_socket_hook)
2611 {
2612 struct input_event buf[256];
2613
2614 read_alarm_should_throw = 0;
2615 if (! setjmp (read_alarm_throw))
2616 nread = (*read_socket_hook) (0, buf, 256, 1);
2617 else
2618 nread = -1;
2619
2620 /* Scan the chars for C-g and store them in kbd_buffer. */
2621 for (i = 0; i < nread; i++)
2622 {
2623 kbd_buffer_store_event (&buf[i]);
2624 /* Don't look at input that follows a C-g too closely.
2625 This reduces lossage due to autorepeat on C-g. */
2626 if (buf[i].kind == ascii_keystroke
2627 && buf[i].code == quit_char)
2628 break;
2629 }
2630 }
2631 else
2632 {
2633 char buf[3];
2634 nread = read (fileno (stdin), buf, 1);
2635
2636 /* Scan the chars for C-g and store them in kbd_buffer. */
2637 e.kind = ascii_keystroke;
2638 XSETFRAME (e.frame_or_window, selected_frame);
2639 e.modifiers = 0;
2640 for (i = 0; i < nread; i++)
2641 {
2642 /* Convert chars > 0177 to meta events if desired.
2643 We do this under the same conditions that read_avail_input does. */
2644 if (read_socket_hook == 0)
2645 {
2646 /* If the user says she has a meta key, then believe her. */
2647 if (meta_key == 1 && (buf[i] & 0x80))
2648 e.modifiers = meta_modifier;
2649 if (meta_key != 2)
2650 buf[i] &= ~0x80;
2651 }
2652
2653 XSETINT (e.code, buf[i]);
2654 kbd_buffer_store_event (&e);
2655 /* Don't look at input that follows a C-g too closely.
2656 This reduces lossage due to autorepeat on C-g. */
2657 if (buf[i] == quit_char)
2658 break;
2659 }
2660 }
2661 }
2662
2663 #endif /* not HAVE_SELECT */
2664 #endif /* not VMS */
2665 #endif /* not MSDOS */
2666 \f
2667 #ifdef BSD4_1
2668 /*
2669 * Partially emulate 4.2 open call.
2670 * open is defined as this in 4.1.
2671 *
2672 * - added by Michael Bloom @ Citicorp/TTI
2673 *
2674 */
2675
2676 int
2677 sys_open (path, oflag, mode)
2678 char *path;
2679 int oflag, mode;
2680 {
2681 if (oflag & O_CREAT)
2682 return creat (path, mode);
2683 else
2684 return open (path, oflag);
2685 }
2686
2687 void
2688 init_sigio (fd)
2689 int fd;
2690 {
2691 if (noninteractive)
2692 return;
2693 lmode = LINTRUP | lmode;
2694 ioctl (fd, TIOCLSET, &lmode);
2695 }
2696
2697 void
2698 reset_sigio ()
2699 {
2700 if (noninteractive)
2701 return;
2702 lmode = ~LINTRUP & lmode;
2703 ioctl (0, TIOCLSET, &lmode);
2704 }
2705
2706 void
2707 request_sigio ()
2708 {
2709 sigrelse (SIGTINT);
2710
2711 interrupts_deferred = 0;
2712 }
2713
2714 void
2715 unrequest_sigio ()
2716 {
2717 sighold (SIGTINT);
2718
2719 interrupts_deferred = 1;
2720 }
2721
2722 /* still inside #ifdef BSD4_1 */
2723 #ifdef subprocesses
2724
2725 int sigheld; /* Mask of held signals */
2726
2727 void
2728 sigholdx (signum)
2729 int signum;
2730 {
2731 sigheld |= sigbit (signum);
2732 sighold (signum);
2733 }
2734
2735 void
2736 sigisheld (signum)
2737 int signum;
2738 {
2739 sigheld |= sigbit (signum);
2740 }
2741
2742 void
2743 sigunhold (signum)
2744 int signum;
2745 {
2746 sigheld &= ~sigbit (signum);
2747 sigrelse (signum);
2748 }
2749
2750 void
2751 sigfree () /* Free all held signals */
2752 {
2753 int i;
2754 for (i = 0; i < NSIG; i++)
2755 if (sigheld & sigbit (i))
2756 sigrelse (i);
2757 sigheld = 0;
2758 }
2759
2760 int
2761 sigbit (i)
2762 {
2763 return 1 << (i - 1);
2764 }
2765 #endif /* subprocesses */
2766 #endif /* BSD4_1 */
2767 \f
2768 /* POSIX signals support - DJB */
2769 /* Anyone with POSIX signals should have ANSI C declarations */
2770
2771 #ifdef POSIX_SIGNALS
2772
2773 sigset_t empty_mask, full_mask;
2774
2775 void
2776 init_signals ()
2777 {
2778 sigemptyset (&empty_mask);
2779 sigfillset (&full_mask);
2780 }
2781
2782 signal_handler_t
2783 sys_signal (int signal_number, signal_handler_t action)
2784 {
2785 struct sigaction new_action, old_action;
2786 sigemptyset (&new_action.sa_mask);
2787 new_action.sa_handler = action;
2788 #ifdef SA_RESTART
2789 /* Emacs mostly works better with restartable system services. If this
2790 * flag exists, we probably want to turn it on here.
2791 */
2792 new_action.sa_flags = SA_RESTART;
2793 #else
2794 new_action.sa_flags = 0;
2795 #endif
2796 sigaction (signal_number, &new_action, &old_action);
2797 return (old_action.sa_handler);
2798 }
2799
2800 #ifndef __GNUC__
2801 /* If we're compiling with GCC, we don't need this function, since it
2802 can be written as a macro. */
2803 sigset_t
2804 sys_sigmask (int sig)
2805 {
2806 sigset_t mask;
2807 sigemptyset (&mask);
2808 sigaddset (&mask, sig);
2809 return mask;
2810 }
2811 #endif
2812
2813 /* I'd like to have these guys return pointers to the mask storage in here,
2814 but there'd be trouble if the code was saving multiple masks. I'll be
2815 safe and pass the structure. It normally won't be more than 2 bytes
2816 anyhow. - DJB */
2817
2818 sigset_t
2819 sys_sigblock (sigset_t new_mask)
2820 {
2821 sigset_t old_mask;
2822 sigprocmask (SIG_BLOCK, &new_mask, &old_mask);
2823 return (old_mask);
2824 }
2825
2826 sigset_t
2827 sys_sigunblock (sigset_t new_mask)
2828 {
2829 sigset_t old_mask;
2830 sigprocmask (SIG_UNBLOCK, &new_mask, &old_mask);
2831 return (old_mask);
2832 }
2833
2834 sigset_t
2835 sys_sigsetmask (sigset_t new_mask)
2836 {
2837 sigset_t old_mask;
2838 sigprocmask (SIG_SETMASK, &new_mask, &old_mask);
2839 return (old_mask);
2840 }
2841
2842 #endif /* POSIX_SIGNALS */
2843 \f
2844 #ifndef HAVE_RANDOM
2845 #ifdef random
2846 #define HAVE_RANDOM
2847 #endif
2848 #endif
2849
2850 /* Figure out how many bits the system's random number generator uses.
2851 `random' and `lrand48' are assumed to return 31 usable bits.
2852 BSD `rand' returns a 31 bit value but the low order bits are unusable;
2853 so we'll shift it and treat it like the 15-bit USG `rand'. */
2854
2855 #ifndef RAND_BITS
2856 # ifdef HAVE_RANDOM
2857 # define RAND_BITS 31
2858 # else /* !HAVE_RANDOM */
2859 # ifdef HAVE_LRAND48
2860 # define RAND_BITS 31
2861 # define random lrand48
2862 # else /* !HAVE_LRAND48 */
2863 # define RAND_BITS 15
2864 # if RAND_MAX == 32767
2865 # define random rand
2866 # else /* RAND_MAX != 32767 */
2867 # if RAND_MAX == 2147483647
2868 # define random() (rand () >> 16)
2869 # else /* RAND_MAX != 2147483647 */
2870 # ifdef USG
2871 # define random rand
2872 # else
2873 # define random() (rand () >> 16)
2874 # endif /* !USG */
2875 # endif /* RAND_MAX != 2147483647 */
2876 # endif /* RAND_MAX != 32767 */
2877 # endif /* !HAVE_LRAND48 */
2878 # endif /* !HAVE_RANDOM */
2879 #endif /* !RAND_BITS */
2880
2881 void
2882 seed_random (arg)
2883 long arg;
2884 {
2885 #ifdef HAVE_RANDOM
2886 srandom ((unsigned int)arg);
2887 #else
2888 # ifdef HAVE_LRAND48
2889 srand48 (arg);
2890 # else
2891 srand ((unsigned int)arg);
2892 # endif
2893 #endif
2894 }
2895
2896 /*
2897 * Build a full Emacs-sized word out of whatever we've got.
2898 * This suffices even for a 64-bit architecture with a 15-bit rand.
2899 */
2900 long
2901 get_random ()
2902 {
2903 long val = random ();
2904 #if VALBITS > RAND_BITS
2905 val = (val << RAND_BITS) ^ random ();
2906 #if VALBITS > 2*RAND_BITS
2907 val = (val << RAND_BITS) ^ random ();
2908 #if VALBITS > 3*RAND_BITS
2909 val = (val << RAND_BITS) ^ random ();
2910 #if VALBITS > 4*RAND_BITS
2911 val = (val << RAND_BITS) ^ random ();
2912 #endif /* need at least 5 */
2913 #endif /* need at least 4 */
2914 #endif /* need at least 3 */
2915 #endif /* need at least 2 */
2916 return val & ((1L << VALBITS) - 1);
2917 }
2918 \f
2919 #ifdef WRONG_NAME_INSQUE
2920
2921 insque (q,p)
2922 caddr_t q,p;
2923 {
2924 _insque (q,p);
2925 }
2926
2927 #endif
2928 \f
2929 #ifdef VMS
2930
2931 #ifdef getenv
2932 /* If any place else asks for the TERM variable,
2933 allow it to be overridden with the EMACS_TERM variable
2934 before attempting to translate the logical name TERM. As a last
2935 resort, ask for VAX C's special idea of the TERM variable. */
2936 #undef getenv
2937 char *
2938 sys_getenv (name)
2939 char *name;
2940 {
2941 register char *val;
2942 static char buf[256];
2943 static struct dsc$descriptor_s equiv
2944 = {sizeof (buf), DSC$K_DTYPE_T, DSC$K_CLASS_S, buf};
2945 static struct dsc$descriptor_s d_name
2946 = {0, DSC$K_DTYPE_T, DSC$K_CLASS_S, 0};
2947 short eqlen;
2948
2949 if (!strcmp (name, "TERM"))
2950 {
2951 val = (char *) getenv ("EMACS_TERM");
2952 if (val)
2953 return val;
2954 }
2955
2956 d_name.dsc$w_length = strlen (name);
2957 d_name.dsc$a_pointer = name;
2958 if (LIB$SYS_TRNLOG (&d_name, &eqlen, &equiv) == 1)
2959 {
2960 char *str = (char *) xmalloc (eqlen + 1);
2961 bcopy (buf, str, eqlen);
2962 str[eqlen] = '\0';
2963 /* This is a storage leak, but a pain to fix. With luck,
2964 no one will ever notice. */
2965 return str;
2966 }
2967 return (char *) getenv (name);
2968 }
2969 #endif /* getenv */
2970
2971 #ifdef abort
2972 /* Since VMS doesn't believe in core dumps, the only way to debug this beast is
2973 to force a call on the debugger from within the image. */
2974 #undef abort
2975 sys_abort ()
2976 {
2977 reset_sys_modes ();
2978 LIB$SIGNAL (SS$_DEBUG);
2979 }
2980 #endif /* abort */
2981 #endif /* VMS */
2982 \f
2983 #ifdef VMS
2984 #ifdef LINK_CRTL_SHARE
2985 #ifdef SHARABLE_LIB_BUG
2986 /* Variables declared noshare and initialized in sharable libraries
2987 cannot be shared. The VMS linker incorrectly forces you to use a private
2988 version which is uninitialized... If not for this "feature", we
2989 could use the C library definition of sys_nerr and sys_errlist. */
2990 int sys_nerr = 35;
2991 char *sys_errlist[] =
2992 {
2993 "error 0",
2994 "not owner",
2995 "no such file or directory",
2996 "no such process",
2997 "interrupted system call",
2998 "i/o error",
2999 "no such device or address",
3000 "argument list too long",
3001 "exec format error",
3002 "bad file number",
3003 "no child process",
3004 "no more processes",
3005 "not enough memory",
3006 "permission denied",
3007 "bad address",
3008 "block device required",
3009 "mount devices busy",
3010 "file exists",
3011 "cross-device link",
3012 "no such device",
3013 "not a directory",
3014 "is a directory",
3015 "invalid argument",
3016 "file table overflow",
3017 "too many open files",
3018 "not a typewriter",
3019 "text file busy",
3020 "file too big",
3021 "no space left on device",
3022 "illegal seek",
3023 "read-only file system",
3024 "too many links",
3025 "broken pipe",
3026 "math argument",
3027 "result too large",
3028 "I/O stream empty",
3029 "vax/vms specific error code nontranslatable error"
3030 };
3031 #endif /* SHARABLE_LIB_BUG */
3032 #endif /* LINK_CRTL_SHARE */
3033 #endif /* VMS */
3034
3035 #ifndef HAVE_STRERROR
3036 #ifndef WINDOWSNT
3037 char *
3038 strerror (errnum)
3039 int errnum;
3040 {
3041 extern char *sys_errlist[];
3042 extern int sys_nerr;
3043
3044 if (errnum >= 0 && errnum < sys_nerr)
3045 return sys_errlist[errnum];
3046 return (char *) "Unknown error";
3047 }
3048 #endif /* not WINDOWSNT */
3049 #endif /* ! HAVE_STRERROR */
3050 \f
3051 #ifdef INTERRUPTIBLE_OPEN
3052
3053 int
3054 /* VARARGS 2 */
3055 sys_open (path, oflag, mode)
3056 char *path;
3057 int oflag, mode;
3058 {
3059 register int rtnval;
3060
3061 while ((rtnval = open (path, oflag, mode)) == -1
3062 && (errno == EINTR));
3063 return (rtnval);
3064 }
3065
3066 #endif /* INTERRUPTIBLE_OPEN */
3067
3068 #ifdef INTERRUPTIBLE_CLOSE
3069
3070 int
3071 sys_close (fd)
3072 int fd;
3073 {
3074 int did_retry = 0;
3075 register int rtnval;
3076
3077 while ((rtnval = close (fd)) == -1
3078 && (errno == EINTR))
3079 did_retry = 1;
3080
3081 /* If close is interrupted SunOS 4.1 may or may not have closed the
3082 file descriptor. If it did the second close will fail with
3083 errno = EBADF. That means we have succeeded. */
3084 if (rtnval == -1 && did_retry && errno == EBADF)
3085 return 0;
3086
3087 return rtnval;
3088 }
3089
3090 #endif /* INTERRUPTIBLE_CLOSE */
3091
3092 #ifdef INTERRUPTIBLE_IO
3093
3094 int
3095 sys_read (fildes, buf, nbyte)
3096 int fildes;
3097 char *buf;
3098 unsigned int nbyte;
3099 {
3100 register int rtnval;
3101
3102 while ((rtnval = read (fildes, buf, nbyte)) == -1
3103 && (errno == EINTR));
3104 return (rtnval);
3105 }
3106
3107 int
3108 sys_write (fildes, buf, nbyte)
3109 int fildes;
3110 char *buf;
3111 unsigned int nbyte;
3112 {
3113 register int rtnval, bytes_written;
3114
3115 bytes_written = 0;
3116
3117 while (nbyte > 0)
3118 {
3119 rtnval = write (fildes, buf, nbyte);
3120
3121 if (rtnval == -1)
3122 {
3123 if (errno == EINTR)
3124 continue;
3125 else
3126 return (bytes_written ? bytes_written : -1);
3127 }
3128
3129 buf += rtnval;
3130 nbyte -= rtnval;
3131 bytes_written += rtnval;
3132 }
3133 return (bytes_written);
3134 }
3135
3136 #endif /* INTERRUPTIBLE_IO */
3137 \f
3138 #ifndef HAVE_VFORK
3139 #ifndef WINDOWSNT
3140 /*
3141 * Substitute fork for vfork on USG flavors.
3142 */
3143
3144 VFORK_RETURN_TYPE
3145 vfork ()
3146 {
3147 return (fork ());
3148 }
3149 #endif /* not WINDOWSNT */
3150 #endif /* not HAVE_VFORK */
3151 \f
3152 #ifdef USG
3153 /*
3154 * All of the following are for USG.
3155 *
3156 * On USG systems the system calls are INTERRUPTIBLE by signals
3157 * that the user program has elected to catch. Thus the system call
3158 * must be retried in these cases. To handle this without massive
3159 * changes in the source code, we remap the standard system call names
3160 * to names for our own functions in sysdep.c that do the system call
3161 * with retries. Actually, for portability reasons, it is good
3162 * programming practice, as this example shows, to limit all actual
3163 * system calls to a single occurrence in the source. Sure, this
3164 * adds an extra level of function call overhead but it is almost
3165 * always negligible. Fred Fish, Unisoft Systems Inc.
3166 */
3167
3168 #ifndef HAVE_SYS_SIGLIST
3169 char *sys_siglist[NSIG + 1] =
3170 {
3171 #ifdef AIX
3172 /* AIX has changed the signals a bit */
3173 "bogus signal", /* 0 */
3174 "hangup", /* 1 SIGHUP */
3175 "interrupt", /* 2 SIGINT */
3176 "quit", /* 3 SIGQUIT */
3177 "illegal instruction", /* 4 SIGILL */
3178 "trace trap", /* 5 SIGTRAP */
3179 "IOT instruction", /* 6 SIGIOT */
3180 "crash likely", /* 7 SIGDANGER */
3181 "floating point exception", /* 8 SIGFPE */
3182 "kill", /* 9 SIGKILL */
3183 "bus error", /* 10 SIGBUS */
3184 "segmentation violation", /* 11 SIGSEGV */
3185 "bad argument to system call", /* 12 SIGSYS */
3186 "write on a pipe with no one to read it", /* 13 SIGPIPE */
3187 "alarm clock", /* 14 SIGALRM */
3188 "software termination signum", /* 15 SIGTERM */
3189 "user defined signal 1", /* 16 SIGUSR1 */
3190 "user defined signal 2", /* 17 SIGUSR2 */
3191 "death of a child", /* 18 SIGCLD */
3192 "power-fail restart", /* 19 SIGPWR */
3193 "bogus signal", /* 20 */
3194 "bogus signal", /* 21 */
3195 "bogus signal", /* 22 */
3196 "bogus signal", /* 23 */
3197 "bogus signal", /* 24 */
3198 "LAN I/O interrupt", /* 25 SIGAIO */
3199 "PTY I/O interrupt", /* 26 SIGPTY */
3200 "I/O intervention required", /* 27 SIGIOINT */
3201 #ifdef AIXHFT
3202 "HFT grant", /* 28 SIGGRANT */
3203 "HFT retract", /* 29 SIGRETRACT */
3204 "HFT sound done", /* 30 SIGSOUND */
3205 "HFT input ready", /* 31 SIGMSG */
3206 #endif
3207 #else /* not AIX */
3208 "bogus signal", /* 0 */
3209 "hangup", /* 1 SIGHUP */
3210 "interrupt", /* 2 SIGINT */
3211 "quit", /* 3 SIGQUIT */
3212 "illegal instruction", /* 4 SIGILL */
3213 "trace trap", /* 5 SIGTRAP */
3214 "IOT instruction", /* 6 SIGIOT */
3215 "EMT instruction", /* 7 SIGEMT */
3216 "floating point exception", /* 8 SIGFPE */
3217 "kill", /* 9 SIGKILL */
3218 "bus error", /* 10 SIGBUS */
3219 "segmentation violation", /* 11 SIGSEGV */
3220 "bad argument to system call", /* 12 SIGSYS */
3221 "write on a pipe with no one to read it", /* 13 SIGPIPE */
3222 "alarm clock", /* 14 SIGALRM */
3223 "software termination signum", /* 15 SIGTERM */
3224 "user defined signal 1", /* 16 SIGUSR1 */
3225 "user defined signal 2", /* 17 SIGUSR2 */
3226 "death of a child", /* 18 SIGCLD */
3227 "power-fail restart", /* 19 SIGPWR */
3228 #ifdef sun
3229 "window size change", /* 20 SIGWINCH */
3230 "urgent socket condition", /* 21 SIGURG */
3231 "pollable event occurred", /* 22 SIGPOLL */
3232 "stop (cannot be caught or ignored)", /* 23 SIGSTOP */
3233 "user stop requested from tty", /* 24 SIGTSTP */
3234 "stopped process has been continued", /* 25 SIGCONT */
3235 "background tty read attempted", /* 26 SIGTTIN */
3236 "background tty write attempted", /* 27 SIGTTOU */
3237 "virtual timer expired", /* 28 SIGVTALRM */
3238 "profiling timer expired", /* 29 SIGPROF */
3239 "exceeded cpu limit", /* 30 SIGXCPU */
3240 "exceeded file size limit", /* 31 SIGXFSZ */
3241 "process's lwps are blocked", /* 32 SIGWAITING */
3242 "special signal used by thread library", /* 33 SIGLWP */
3243 #ifdef SIGFREEZE
3244 "Special Signal Used By CPR", /* 34 SIGFREEZE */
3245 #endif
3246 #ifdef SIGTHAW
3247 "Special Signal Used By CPR", /* 35 SIGTHAW */
3248 #endif
3249 #endif /* sun */
3250 #endif /* not AIX */
3251 0
3252 };
3253 #endif /* HAVE_SYS_SIGLIST */
3254
3255 /*
3256 * Warning, this function may not duplicate 4.2 action properly
3257 * under error conditions.
3258 */
3259
3260 #ifndef MAXPATHLEN
3261 /* In 4.1, param.h fails to define this. */
3262 #define MAXPATHLEN 1024
3263 #endif
3264
3265 #ifndef HAVE_GETWD
3266
3267 char *
3268 getwd (pathname)
3269 char *pathname;
3270 {
3271 char *npath, *spath;
3272 extern char *getcwd ();
3273
3274 BLOCK_INPUT; /* getcwd uses malloc */
3275 spath = npath = getcwd ((char *) 0, MAXPATHLEN);
3276 if (spath == 0)
3277 return spath;
3278 /* On Altos 3068, getcwd can return @hostname/dir, so discard
3279 up to first slash. Should be harmless on other systems. */
3280 while (*npath && *npath != '/')
3281 npath++;
3282 strcpy (pathname, npath);
3283 free (spath); /* getcwd uses malloc */
3284 UNBLOCK_INPUT;
3285 return pathname;
3286 }
3287
3288 #endif /* HAVE_GETWD */
3289
3290 /*
3291 * Emulate rename using unlink/link. Note that this is
3292 * only partially correct. Also, doesn't enforce restriction
3293 * that files be of same type (regular->regular, dir->dir, etc).
3294 */
3295
3296 #ifndef HAVE_RENAME
3297
3298 rename (from, to)
3299 const char *from;
3300 const char *to;
3301 {
3302 if (access (from, 0) == 0)
3303 {
3304 unlink (to);
3305 if (link (from, to) == 0)
3306 if (unlink (from) == 0)
3307 return (0);
3308 }
3309 return (-1);
3310 }
3311
3312 #endif
3313
3314
3315 #ifdef HPUX
3316 #ifndef HAVE_PERROR
3317
3318 /* HPUX curses library references perror, but as far as we know
3319 it won't be called. Anyway this definition will do for now. */
3320
3321 perror ()
3322 {
3323 }
3324
3325 #endif /* not HAVE_PERROR */
3326 #endif /* HPUX */
3327
3328 #ifndef HAVE_DUP2
3329
3330 /*
3331 * Emulate BSD dup2. First close newd if it already exists.
3332 * Then, attempt to dup oldd. If not successful, call dup2 recursively
3333 * until we are, then close the unsuccessful ones.
3334 */
3335
3336 dup2 (oldd, newd)
3337 int oldd;
3338 int newd;
3339 {
3340 register int fd, ret;
3341
3342 sys_close (newd);
3343
3344 #ifdef F_DUPFD
3345 fd = fcntl (oldd, F_DUPFD, newd);
3346 if (fd != newd)
3347 error ("can't dup2 (%i,%i) : %s", oldd, newd, strerror (errno));
3348 #else
3349 fd = dup (old);
3350 if (fd == -1)
3351 return -1;
3352 if (fd == new)
3353 return new;
3354 ret = dup2 (old,new);
3355 sys_close (fd);
3356 return ret;
3357 #endif
3358 }
3359
3360 #endif /* not HAVE_DUP2 */
3361
3362 /*
3363 * Gettimeofday. Simulate as much as possible. Only accurate
3364 * to nearest second. Emacs doesn't use tzp so ignore it for now.
3365 * Only needed when subprocesses are defined.
3366 */
3367
3368 #ifdef subprocesses
3369 #ifndef VMS
3370 #ifndef HAVE_GETTIMEOFDAY
3371 #ifdef HAVE_TIMEVAL
3372
3373 /* ARGSUSED */
3374 int
3375 gettimeofday (tp, tzp)
3376 struct timeval *tp;
3377 struct timezone *tzp;
3378 {
3379 extern long time ();
3380
3381 tp->tv_sec = time ((long *)0);
3382 tp->tv_usec = 0;
3383 if (tzp != 0)
3384 tzp->tz_minuteswest = -1;
3385 return 0;
3386 }
3387
3388 #endif
3389 #endif
3390 #endif
3391 #endif /* subprocess && !HAVE_GETTIMEOFDAY && HAVE_TIMEVAL && !VMS */
3392
3393 /*
3394 * This function will go away as soon as all the stubs fixed. (fnf)
3395 */
3396
3397 void
3398 croak (badfunc)
3399 char *badfunc;
3400 {
3401 printf ("%s not yet implemented\r\n", badfunc);
3402 reset_sys_modes ();
3403 exit (1);
3404 }
3405
3406 #endif /* USG */
3407 \f
3408 #ifdef DGUX
3409
3410 char *sys_siglist[NSIG + 1] =
3411 {
3412 "null signal", /* 0 SIGNULL */
3413 "hangup", /* 1 SIGHUP */
3414 "interrupt", /* 2 SIGINT */
3415 "quit", /* 3 SIGQUIT */
3416 "illegal instruction", /* 4 SIGILL */
3417 "trace trap", /* 5 SIGTRAP */
3418 "abort termination", /* 6 SIGABRT */
3419 "SIGEMT", /* 7 SIGEMT */
3420 "floating point exception", /* 8 SIGFPE */
3421 "kill", /* 9 SIGKILL */
3422 "bus error", /* 10 SIGBUS */
3423 "segmentation violation", /* 11 SIGSEGV */
3424 "bad argument to system call", /* 12 SIGSYS */
3425 "write on a pipe with no reader", /* 13 SIGPIPE */
3426 "alarm clock", /* 14 SIGALRM */
3427 "software termination signal", /* 15 SIGTERM */
3428 "user defined signal 1", /* 16 SIGUSR1 */
3429 "user defined signal 2", /* 17 SIGUSR2 */
3430 "child stopped or terminated", /* 18 SIGCLD */
3431 "power-fail restart", /* 19 SIGPWR */
3432 "window size changed", /* 20 SIGWINCH */
3433 "undefined", /* 21 */
3434 "pollable event occurred", /* 22 SIGPOLL */
3435 "sendable stop signal not from tty", /* 23 SIGSTOP */
3436 "stop signal from tty", /* 24 SIGSTP */
3437 "continue a stopped process", /* 25 SIGCONT */
3438 "attempted background tty read", /* 26 SIGTTIN */
3439 "attempted background tty write", /* 27 SIGTTOU */
3440 "undefined", /* 28 */
3441 "undefined", /* 29 */
3442 "undefined", /* 30 */
3443 "undefined", /* 31 */
3444 "undefined", /* 32 */
3445 "socket (TCP/IP) urgent data arrival", /* 33 SIGURG */
3446 "I/O is possible", /* 34 SIGIO */
3447 "exceeded cpu time limit", /* 35 SIGXCPU */
3448 "exceeded file size limit", /* 36 SIGXFSZ */
3449 "virtual time alarm", /* 37 SIGVTALRM */
3450 "profiling time alarm", /* 38 SIGPROF */
3451 "undefined", /* 39 */
3452 "file record locks revoked", /* 40 SIGLOST */
3453 "undefined", /* 41 */
3454 "undefined", /* 42 */
3455 "undefined", /* 43 */
3456 "undefined", /* 44 */
3457 "undefined", /* 45 */
3458 "undefined", /* 46 */
3459 "undefined", /* 47 */
3460 "undefined", /* 48 */
3461 "undefined", /* 49 */
3462 "undefined", /* 50 */
3463 "undefined", /* 51 */
3464 "undefined", /* 52 */
3465 "undefined", /* 53 */
3466 "undefined", /* 54 */
3467 "undefined", /* 55 */
3468 "undefined", /* 56 */
3469 "undefined", /* 57 */
3470 "undefined", /* 58 */
3471 "undefined", /* 59 */
3472 "undefined", /* 60 */
3473 "undefined", /* 61 */
3474 "undefined", /* 62 */
3475 "undefined", /* 63 */
3476 "notification message in mess. queue", /* 64 SIGDGNOTIFY */
3477 0
3478 };
3479
3480 #endif /* DGUX */
3481 \f
3482 /* Directory routines for systems that don't have them. */
3483
3484 #ifdef SYSV_SYSTEM_DIR
3485
3486 #include <dirent.h>
3487
3488 #if defined(BROKEN_CLOSEDIR) || !defined(HAVE_CLOSEDIR)
3489
3490 int
3491 closedir (dirp)
3492 register DIR *dirp; /* stream from opendir */
3493 {
3494 int rtnval;
3495
3496 rtnval = sys_close (dirp->dd_fd);
3497
3498 /* Some systems (like Solaris) allocate the buffer and the DIR all
3499 in one block. Why in the world are we freeing this ourselves
3500 anyway? */
3501 #if ! (defined (sun) && defined (USG5_4))
3502 xfree ((char *) dirp->dd_buf); /* directory block defined in <dirent.h> */
3503 #endif
3504 xfree ((char *) dirp);
3505
3506 return rtnval;
3507 }
3508 #endif /* BROKEN_CLOSEDIR or not HAVE_CLOSEDIR */
3509 #endif /* SYSV_SYSTEM_DIR */
3510
3511 #ifdef NONSYSTEM_DIR_LIBRARY
3512
3513 DIR *
3514 opendir (filename)
3515 char *filename; /* name of directory */
3516 {
3517 register DIR *dirp; /* -> malloc'ed storage */
3518 register int fd; /* file descriptor for read */
3519 struct stat sbuf; /* result of fstat */
3520
3521 fd = sys_open (filename, 0);
3522 if (fd < 0)
3523 return 0;
3524
3525 BLOCK_INPUT;
3526 if (fstat (fd, &sbuf) < 0
3527 || (sbuf.st_mode & S_IFMT) != S_IFDIR
3528 || (dirp = (DIR *) malloc (sizeof (DIR))) == 0)
3529 {
3530 sys_close (fd);
3531 UNBLOCK_INPUT;
3532 return 0; /* bad luck today */
3533 }
3534 UNBLOCK_INPUT;
3535
3536 dirp->dd_fd = fd;
3537 dirp->dd_loc = dirp->dd_size = 0; /* refill needed */
3538
3539 return dirp;
3540 }
3541
3542 void
3543 closedir (dirp)
3544 register DIR *dirp; /* stream from opendir */
3545 {
3546 sys_close (dirp->dd_fd);
3547 xfree ((char *) dirp);
3548 }
3549
3550
3551 #ifndef VMS
3552 #define DIRSIZ 14
3553 struct olddir
3554 {
3555 ino_t od_ino; /* inode */
3556 char od_name[DIRSIZ]; /* filename */
3557 };
3558 #endif /* not VMS */
3559
3560 struct direct dir_static; /* simulated directory contents */
3561
3562 /* ARGUSED */
3563 struct direct *
3564 readdir (dirp)
3565 register DIR *dirp; /* stream from opendir */
3566 {
3567 #ifndef VMS
3568 register struct olddir *dp; /* -> directory data */
3569 #else /* VMS */
3570 register struct dir$_name *dp; /* -> directory data */
3571 register struct dir$_version *dv; /* -> version data */
3572 #endif /* VMS */
3573
3574 for (; ;)
3575 {
3576 if (dirp->dd_loc >= dirp->dd_size)
3577 dirp->dd_loc = dirp->dd_size = 0;
3578
3579 if (dirp->dd_size == 0 /* refill buffer */
3580 && (dirp->dd_size = sys_read (dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ)) <= 0)
3581 return 0;
3582
3583 #ifndef VMS
3584 dp = (struct olddir *) &dirp->dd_buf[dirp->dd_loc];
3585 dirp->dd_loc += sizeof (struct olddir);
3586
3587 if (dp->od_ino != 0) /* not deleted entry */
3588 {
3589 dir_static.d_ino = dp->od_ino;
3590 strncpy (dir_static.d_name, dp->od_name, DIRSIZ);
3591 dir_static.d_name[DIRSIZ] = '\0';
3592 dir_static.d_namlen = strlen (dir_static.d_name);
3593 dir_static.d_reclen = sizeof (struct direct)
3594 - MAXNAMLEN + 3
3595 + dir_static.d_namlen - dir_static.d_namlen % 4;
3596 return &dir_static; /* -> simulated structure */
3597 }
3598 #else /* VMS */
3599 dp = (struct dir$_name *) dirp->dd_buf;
3600 if (dirp->dd_loc == 0)
3601 dirp->dd_loc = (dp->dir$b_namecount&1) ? dp->dir$b_namecount + 1
3602 : dp->dir$b_namecount;
3603 dv = (struct dir$_version *)&dp->dir$t_name[dirp->dd_loc];
3604 dir_static.d_ino = dv->dir$w_fid_num;
3605 dir_static.d_namlen = dp->dir$b_namecount;
3606 dir_static.d_reclen = sizeof (struct direct)
3607 - MAXNAMLEN + 3
3608 + dir_static.d_namlen - dir_static.d_namlen % 4;
3609 strncpy (dir_static.d_name, dp->dir$t_name, dp->dir$b_namecount);
3610 dir_static.d_name[dir_static.d_namlen] = '\0';
3611 dirp->dd_loc = dirp->dd_size; /* only one record at a time */
3612 return &dir_static;
3613 #endif /* VMS */
3614 }
3615 }
3616
3617 #ifdef VMS
3618 /* readdirver is just like readdir except it returns all versions of a file
3619 as separate entries. */
3620
3621 /* ARGUSED */
3622 struct direct *
3623 readdirver (dirp)
3624 register DIR *dirp; /* stream from opendir */
3625 {
3626 register struct dir$_name *dp; /* -> directory data */
3627 register struct dir$_version *dv; /* -> version data */
3628
3629 if (dirp->dd_loc >= dirp->dd_size - sizeof (struct dir$_name))
3630 dirp->dd_loc = dirp->dd_size = 0;
3631
3632 if (dirp->dd_size == 0 /* refill buffer */
3633 && (dirp->dd_size = sys_read (dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ)) <= 0)
3634 return 0;
3635
3636 dp = (struct dir$_name *) dirp->dd_buf;
3637 if (dirp->dd_loc == 0)
3638 dirp->dd_loc = (dp->dir$b_namecount & 1) ? dp->dir$b_namecount + 1
3639 : dp->dir$b_namecount;
3640 dv = (struct dir$_version *) &dp->dir$t_name[dirp->dd_loc];
3641 strncpy (dir_static.d_name, dp->dir$t_name, dp->dir$b_namecount);
3642 sprintf (&dir_static.d_name[dp->dir$b_namecount], ";%d", dv->dir$w_version);
3643 dir_static.d_namlen = strlen (dir_static.d_name);
3644 dir_static.d_ino = dv->dir$w_fid_num;
3645 dir_static.d_reclen = sizeof (struct direct) - MAXNAMLEN + 3
3646 + dir_static.d_namlen - dir_static.d_namlen % 4;
3647 dirp->dd_loc = ((char *) (++dv) - dp->dir$t_name);
3648 return &dir_static;
3649 }
3650
3651 #endif /* VMS */
3652
3653 #endif /* NONSYSTEM_DIR_LIBRARY */
3654
3655 \f
3656 int
3657 set_file_times (filename, atime, mtime)
3658 char *filename;
3659 EMACS_TIME atime, mtime;
3660 {
3661 #ifdef HAVE_UTIMES
3662 struct timeval tv[2];
3663 tv[0] = atime;
3664 tv[1] = mtime;
3665 return utimes (filename, tv);
3666 #else /* not HAVE_UTIMES */
3667 struct utimbuf utb;
3668 utb.actime = EMACS_SECS (atime);
3669 utb.modtime = EMACS_SECS (mtime);
3670 return utime (filename, &utb);
3671 #endif /* not HAVE_UTIMES */
3672 }
3673 \f
3674 /* mkdir and rmdir functions, for systems which don't have them. */
3675
3676 #ifndef HAVE_MKDIR
3677 /*
3678 * Written by Robert Rother, Mariah Corporation, August 1985.
3679 *
3680 * If you want it, it's yours. All I ask in return is that if you
3681 * figure out how to do this in a Bourne Shell script you send me
3682 * a copy.
3683 * sdcsvax!rmr or rmr@uscd
3684 *
3685 * Severely hacked over by John Gilmore to make a 4.2BSD compatible
3686 * subroutine. 11Mar86; hoptoad!gnu
3687 *
3688 * Modified by rmtodd@uokmax 6-28-87 -- when making an already existing dir,
3689 * subroutine didn't return EEXIST. It does now.
3690 */
3691
3692 /*
3693 * Make a directory.
3694 */
3695 #ifdef MKDIR_PROTOTYPE
3696 MKDIR_PROTOTYPE
3697 #else
3698 int
3699 mkdir (dpath, dmode)
3700 char *dpath;
3701 int dmode;
3702 #endif
3703 {
3704 int cpid, status, fd;
3705 struct stat statbuf;
3706
3707 if (stat (dpath, &statbuf) == 0)
3708 {
3709 errno = EEXIST; /* Stat worked, so it already exists */
3710 return -1;
3711 }
3712
3713 /* If stat fails for a reason other than non-existence, return error */
3714 if (errno != ENOENT)
3715 return -1;
3716
3717 synch_process_alive = 1;
3718 switch (cpid = fork ())
3719 {
3720
3721 case -1: /* Error in fork */
3722 return (-1); /* Errno is set already */
3723
3724 case 0: /* Child process */
3725 /*
3726 * Cheap hack to set mode of new directory. Since this
3727 * child process is going away anyway, we zap its umask.
3728 * FIXME, this won't suffice to set SUID, SGID, etc. on this
3729 * directory. Does anybody care?
3730 */
3731 status = umask (0); /* Get current umask */
3732 status = umask (status | (0777 & ~dmode)); /* Set for mkdir */
3733 fd = sys_open("/dev/null", 2);
3734 if (fd >= 0)
3735 {
3736 dup2 (fd, 0);
3737 dup2 (fd, 1);
3738 dup2 (fd, 2);
3739 }
3740 execl ("/bin/mkdir", "mkdir", dpath, (char *) 0);
3741 _exit (-1); /* Can't exec /bin/mkdir */
3742
3743 default: /* Parent process */
3744 wait_for_termination (cpid);
3745 }
3746
3747 if (synch_process_death != 0 || synch_process_retcode != 0)
3748 {
3749 errno = EIO; /* We don't know why, but */
3750 return -1; /* /bin/mkdir failed */
3751 }
3752
3753 return 0;
3754 }
3755 #endif /* not HAVE_MKDIR */
3756
3757 #ifndef HAVE_RMDIR
3758 int
3759 rmdir (dpath)
3760 char *dpath;
3761 {
3762 int cpid, status, fd;
3763 struct stat statbuf;
3764
3765 if (stat (dpath, &statbuf) != 0)
3766 {
3767 /* Stat just set errno. We don't have to */
3768 return -1;
3769 }
3770
3771 synch_process_alive = 1;
3772 switch (cpid = fork ())
3773 {
3774
3775 case -1: /* Error in fork */
3776 return (-1); /* Errno is set already */
3777
3778 case 0: /* Child process */
3779 fd = sys_open("/dev/null", 2);
3780 if (fd >= 0)
3781 {
3782 dup2 (fd, 0);
3783 dup2 (fd, 1);
3784 dup2 (fd, 2);
3785 }
3786 execl ("/bin/rmdir", "rmdir", dpath, (char *) 0);
3787 _exit (-1); /* Can't exec /bin/rmdir */
3788
3789 default: /* Parent process */
3790 wait_for_termination (cpid);
3791 }
3792
3793 if (synch_process_death != 0 || synch_process_retcode != 0)
3794 {
3795 errno = EIO; /* We don't know why, but */
3796 return -1; /* /bin/rmdir failed */
3797 }
3798
3799 return 0;
3800 }
3801 #endif /* !HAVE_RMDIR */
3802
3803
3804 \f
3805 /* Functions for VMS */
3806 #ifdef VMS
3807 #include "vms-pwd.h"
3808 #include <acldef.h>
3809 #include <chpdef.h>
3810 #include <jpidef.h>
3811
3812 /* Return as a string the VMS error string pertaining to STATUS.
3813 Reuses the same static buffer each time it is called. */
3814
3815 char *
3816 vmserrstr (status)
3817 int status; /* VMS status code */
3818 {
3819 int bufadr[2];
3820 short len;
3821 static char buf[257];
3822
3823 bufadr[0] = sizeof buf - 1;
3824 bufadr[1] = (int) buf;
3825 if (! (SYS$GETMSG (status, &len, bufadr, 0x1, 0) & 1))
3826 return "untranslatable VMS error status";
3827 buf[len] = '\0';
3828 return buf;
3829 }
3830
3831 #ifdef access
3832 #undef access
3833
3834 /* The following is necessary because 'access' emulation by VMS C (2.0) does
3835 * not work correctly. (It also doesn't work well in version 2.3.)
3836 */
3837
3838 #ifdef VMS4_4
3839
3840 #define DESCRIPTOR(name,string) struct dsc$descriptor_s name = \
3841 { strlen (string), DSC$K_DTYPE_T, DSC$K_CLASS_S, string }
3842
3843 typedef union {
3844 struct {
3845 unsigned short s_buflen;
3846 unsigned short s_code;
3847 char *s_bufadr;
3848 unsigned short *s_retlenadr;
3849 } s;
3850 int end;
3851 } item;
3852 #define buflen s.s_buflen
3853 #define code s.s_code
3854 #define bufadr s.s_bufadr
3855 #define retlenadr s.s_retlenadr
3856
3857 #define R_OK 4 /* test for read permission */
3858 #define W_OK 2 /* test for write permission */
3859 #define X_OK 1 /* test for execute (search) permission */
3860 #define F_OK 0 /* test for presence of file */
3861
3862 int
3863 sys_access (path, mode)
3864 char *path;
3865 int mode;
3866 {
3867 static char *user = NULL;
3868 char dir_fn[512];
3869
3870 /* translate possible directory spec into .DIR file name, so brain-dead
3871 * access can treat the directory like a file. */
3872 if (directory_file_name (path, dir_fn))
3873 path = dir_fn;
3874
3875 if (mode == F_OK)
3876 return access (path, mode);
3877 if (user == NULL && (user = (char *) getenv ("USER")) == NULL)
3878 return -1;
3879 {
3880 int stat;
3881 int flags;
3882 int acces;
3883 unsigned short int dummy;
3884 item itemlst[3];
3885 static int constant = ACL$C_FILE;
3886 DESCRIPTOR (path_desc, path);
3887 DESCRIPTOR (user_desc, user);
3888
3889 flags = 0;
3890 acces = 0;
3891 if ((mode & X_OK) && ((stat = access (path, mode)) < 0 || mode == X_OK))
3892 return stat;
3893 if (mode & R_OK)
3894 acces |= CHP$M_READ;
3895 if (mode & W_OK)
3896 acces |= CHP$M_WRITE;
3897 itemlst[0].buflen = sizeof (int);
3898 itemlst[0].code = CHP$_FLAGS;
3899 itemlst[0].bufadr = (char *) &flags;
3900 itemlst[0].retlenadr = &dummy;
3901 itemlst[1].buflen = sizeof (int);
3902 itemlst[1].code = CHP$_ACCESS;
3903 itemlst[1].bufadr = (char *) &acces;
3904 itemlst[1].retlenadr = &dummy;
3905 itemlst[2].end = CHP$_END;
3906 stat = SYS$CHECK_ACCESS (&constant, &path_desc, &user_desc, itemlst);
3907 return stat == SS$_NORMAL ? 0 : -1;
3908 }
3909 }
3910
3911 #else /* not VMS4_4 */
3912
3913 #include <prvdef.h>
3914 #define ACE$M_WRITE 2
3915 #define ACE$C_KEYID 1
3916
3917 static unsigned short memid, grpid;
3918 static unsigned int uic;
3919
3920 /* Called from init_sys_modes, so it happens not very often
3921 but at least each time Emacs is loaded. */
3922 void
3923 sys_access_reinit ()
3924 {
3925 uic = 0;
3926 }
3927
3928 int
3929 sys_access (filename, type)
3930 char * filename;
3931 int type;
3932 {
3933 struct FAB fab;
3934 struct XABPRO xab;
3935 int status, size, i, typecode, acl_controlled;
3936 unsigned int *aclptr, *aclend, aclbuf[60];
3937 union prvdef prvmask;
3938
3939 /* Get UIC and GRP values for protection checking. */
3940 if (uic == 0)
3941 {
3942 status = LIB$GETJPI (&JPI$_UIC, 0, 0, &uic, 0, 0);
3943 if (! (status & 1))
3944 return -1;
3945 memid = uic & 0xFFFF;
3946 grpid = uic >> 16;
3947 }
3948
3949 if (type != 2) /* not checking write access */
3950 return access (filename, type);
3951
3952 /* Check write protection. */
3953
3954 #define CHECKPRIV(bit) (prvmask.bit)
3955 #define WRITABLE(field) (! ((xab.xab$w_pro >> field) & XAB$M_NOWRITE))
3956
3957 /* Find privilege bits */
3958 status = SYS$SETPRV (0, 0, 0, prvmask);
3959 if (! (status & 1))
3960 error ("Unable to find privileges: %s", vmserrstr (status));
3961 if (CHECKPRIV (PRV$V_BYPASS))
3962 return 0; /* BYPASS enabled */
3963 fab = cc$rms_fab;
3964 fab.fab$b_fac = FAB$M_GET;
3965 fab.fab$l_fna = filename;
3966 fab.fab$b_fns = strlen (filename);
3967 fab.fab$l_xab = &xab;
3968 xab = cc$rms_xabpro;
3969 xab.xab$l_aclbuf = aclbuf;
3970 xab.xab$w_aclsiz = sizeof (aclbuf);
3971 status = SYS$OPEN (&fab, 0, 0);
3972 if (! (status & 1))
3973 return -1;
3974 SYS$CLOSE (&fab, 0, 0);
3975 /* Check system access */
3976 if (CHECKPRIV (PRV$V_SYSPRV) && WRITABLE (XAB$V_SYS))
3977 return 0;
3978 /* Check ACL entries, if any */
3979 acl_controlled = 0;
3980 if (xab.xab$w_acllen > 0)
3981 {
3982 aclptr = aclbuf;
3983 aclend = &aclbuf[xab.xab$w_acllen / 4];
3984 while (*aclptr && aclptr < aclend)
3985 {
3986 size = (*aclptr & 0xff) / 4;
3987 typecode = (*aclptr >> 8) & 0xff;
3988 if (typecode == ACE$C_KEYID)
3989 for (i = size - 1; i > 1; i--)
3990 if (aclptr[i] == uic)
3991 {
3992 acl_controlled = 1;
3993 if (aclptr[1] & ACE$M_WRITE)
3994 return 0; /* Write access through ACL */
3995 }
3996 aclptr = &aclptr[size];
3997 }
3998 if (acl_controlled) /* ACL specified, prohibits write access */
3999 return -1;
4000 }
4001 /* No ACL entries specified, check normal protection */
4002 if (WRITABLE (XAB$V_WLD)) /* World writable */
4003 return 0;
4004 if (WRITABLE (XAB$V_GRP) &&
4005 (unsigned short) (xab.xab$l_uic >> 16) == grpid)
4006 return 0; /* Group writable */
4007 if (WRITABLE (XAB$V_OWN) &&
4008 (xab.xab$l_uic & 0xFFFF) == memid)
4009 return 0; /* Owner writable */
4010
4011 return -1; /* Not writable */
4012 }
4013 #endif /* not VMS4_4 */
4014 #endif /* access */
4015
4016 static char vtbuf[NAM$C_MAXRSS+1];
4017
4018 /* translate a vms file spec to a unix path */
4019 char *
4020 sys_translate_vms (vfile)
4021 char * vfile;
4022 {
4023 char * p;
4024 char * targ;
4025
4026 if (!vfile)
4027 return 0;
4028
4029 targ = vtbuf;
4030
4031 /* leading device or logical name is a root directory */
4032 if (p = strchr (vfile, ':'))
4033 {
4034 *targ++ = '/';
4035 while (vfile < p)
4036 *targ++ = *vfile++;
4037 vfile++;
4038 *targ++ = '/';
4039 }
4040 p = vfile;
4041 if (*p == '[' || *p == '<')
4042 {
4043 while (*++vfile != *p + 2)
4044 switch (*vfile)
4045 {
4046 case '.':
4047 if (vfile[-1] == *p)
4048 *targ++ = '.';
4049 *targ++ = '/';
4050 break;
4051
4052 case '-':
4053 *targ++ = '.';
4054 *targ++ = '.';
4055 break;
4056
4057 default:
4058 *targ++ = *vfile;
4059 break;
4060 }
4061 vfile++;
4062 *targ++ = '/';
4063 }
4064 while (*vfile)
4065 *targ++ = *vfile++;
4066
4067 return vtbuf;
4068 }
4069
4070 static char utbuf[NAM$C_MAXRSS+1];
4071
4072 /* translate a unix path to a VMS file spec */
4073 char *
4074 sys_translate_unix (ufile)
4075 char * ufile;
4076 {
4077 int slash_seen = 0;
4078 char *p;
4079 char * targ;
4080
4081 if (!ufile)
4082 return 0;
4083
4084 targ = utbuf;
4085
4086 if (*ufile == '/')
4087 {
4088 ufile++;
4089 }
4090
4091 while (*ufile)
4092 {
4093 switch (*ufile)
4094 {
4095 case '/':
4096 if (slash_seen)
4097 if (index (&ufile[1], '/'))
4098 *targ++ = '.';
4099 else
4100 *targ++ = ']';
4101 else
4102 {
4103 *targ++ = ':';
4104 if (index (&ufile[1], '/'))
4105 *targ++ = '[';
4106 slash_seen = 1;
4107 }
4108 break;
4109
4110 case '.':
4111 if (strncmp (ufile, "./", 2) == 0)
4112 {
4113 if (!slash_seen)
4114 {
4115 *targ++ = '[';
4116 slash_seen = 1;
4117 }
4118 ufile++; /* skip the dot */
4119 if (index (&ufile[1], '/'))
4120 *targ++ = '.';
4121 else
4122 *targ++ = ']';
4123 }
4124 else if (strncmp (ufile, "../", 3) == 0)
4125 {
4126 if (!slash_seen)
4127 {
4128 *targ++ = '[';
4129 slash_seen = 1;
4130 }
4131 *targ++ = '-';
4132 ufile += 2; /* skip the dots */
4133 if (index (&ufile[1], '/'))
4134 *targ++ = '.';
4135 else
4136 *targ++ = ']';
4137 }
4138 else
4139 *targ++ = *ufile;
4140 break;
4141
4142 default:
4143 *targ++ = *ufile;
4144 break;
4145 }
4146 ufile++;
4147 }
4148 *targ = '\0';
4149
4150 return utbuf;
4151 }
4152
4153 char *
4154 getwd (pathname)
4155 char *pathname;
4156 {
4157 char *ptr, *val;
4158 extern char *getcwd ();
4159
4160 #define MAXPATHLEN 1024
4161
4162 ptr = xmalloc (MAXPATHLEN);
4163 val = getcwd (ptr, MAXPATHLEN);
4164 if (val == 0)
4165 {
4166 xfree (ptr);
4167 return val;
4168 }
4169 strcpy (pathname, ptr);
4170 xfree (ptr);
4171
4172 return pathname;
4173 }
4174
4175 int
4176 getppid ()
4177 {
4178 long item_code = JPI$_OWNER;
4179 unsigned long parent_id;
4180 int status;
4181
4182 if (((status = LIB$GETJPI (&item_code, 0, 0, &parent_id)) & 1) == 0)
4183 {
4184 errno = EVMSERR;
4185 vaxc$errno = status;
4186 return -1;
4187 }
4188 return parent_id;
4189 }
4190
4191 #undef getuid
4192 unsigned
4193 sys_getuid ()
4194 {
4195 return (getgid () << 16) | getuid ();
4196 }
4197
4198 int
4199 sys_read (fildes, buf, nbyte)
4200 int fildes;
4201 char *buf;
4202 unsigned int nbyte;
4203 {
4204 return read (fildes, buf, (nbyte < MAXIOSIZE ? nbyte : MAXIOSIZE));
4205 }
4206
4207 #if 0
4208 int
4209 sys_write (fildes, buf, nbyte)
4210 int fildes;
4211 char *buf;
4212 unsigned int nbyte;
4213 {
4214 register int nwrote, rtnval = 0;
4215
4216 while (nbyte > MAXIOSIZE && (nwrote = write (fildes, buf, MAXIOSIZE)) > 0) {
4217 nbyte -= nwrote;
4218 buf += nwrote;
4219 rtnval += nwrote;
4220 }
4221 if (nwrote < 0)
4222 return rtnval ? rtnval : -1;
4223 if ((nwrote = write (fildes, buf, nbyte)) < 0)
4224 return rtnval ? rtnval : -1;
4225 return (rtnval + nwrote);
4226 }
4227 #endif /* 0 */
4228
4229 /*
4230 * VAX/VMS VAX C RTL really loses. It insists that records
4231 * end with a newline (carriage return) character, and if they
4232 * don't it adds one (nice of it isn't it!)
4233 *
4234 * Thus we do this stupidity below.
4235 */
4236
4237 int
4238 sys_write (fildes, buf, nbytes)
4239 int fildes;
4240 char *buf;
4241 unsigned int nbytes;
4242 {
4243 register char *p;
4244 register char *e;
4245 int sum = 0;
4246 struct stat st;
4247
4248 fstat (fildes, &st);
4249 p = buf;
4250 while (nbytes > 0)
4251 {
4252 int len, retval;
4253
4254 /* Handle fixed-length files with carriage control. */
4255 if (st.st_fab_rfm == FAB$C_FIX
4256 && ((st.st_fab_rat & (FAB$M_FTN | FAB$M_CR)) != 0))
4257 {
4258 len = st.st_fab_mrs;
4259 retval = write (fildes, p, min (len, nbytes));
4260 if (retval != len)
4261 return -1;
4262 retval++; /* This skips the implied carriage control */
4263 }
4264 else
4265 {
4266 e = p + min (MAXIOSIZE, nbytes) - 1;
4267 while (*e != '\n' && e > p) e--;
4268 if (p == e) /* Ok.. so here we add a newline... sigh. */
4269 e = p + min (MAXIOSIZE, nbytes) - 1;
4270 len = e + 1 - p;
4271 retval = write (fildes, p, len);
4272 if (retval != len)
4273 return -1;
4274 }
4275 p += retval;
4276 sum += retval;
4277 nbytes -= retval;
4278 }
4279 return sum;
4280 }
4281
4282 /* Create file NEW copying its attributes from file OLD. If
4283 OLD is 0 or does not exist, create based on the value of
4284 vms_stmlf_recfm. */
4285
4286 /* Protection value the file should ultimately have.
4287 Set by create_copy_attrs, and use by rename_sansversions. */
4288 static unsigned short int fab_final_pro;
4289
4290 int
4291 creat_copy_attrs (old, new)
4292 char *old, *new;
4293 {
4294 struct FAB fab = cc$rms_fab;
4295 struct XABPRO xabpro;
4296 char aclbuf[256]; /* Choice of size is arbitrary. See below. */
4297 extern int vms_stmlf_recfm;
4298
4299 if (old)
4300 {
4301 fab.fab$b_fac = FAB$M_GET;
4302 fab.fab$l_fna = old;
4303 fab.fab$b_fns = strlen (old);
4304 fab.fab$l_xab = (char *) &xabpro;
4305 xabpro = cc$rms_xabpro;
4306 xabpro.xab$l_aclbuf = aclbuf;
4307 xabpro.xab$w_aclsiz = sizeof aclbuf;
4308 /* Call $OPEN to fill in the fab & xabpro fields. */
4309 if (SYS$OPEN (&fab, 0, 0) & 1)
4310 {
4311 SYS$CLOSE (&fab, 0, 0);
4312 fab.fab$l_alq = 0; /* zero the allocation quantity */
4313 if (xabpro.xab$w_acllen > 0)
4314 {
4315 if (xabpro.xab$w_acllen > sizeof aclbuf)
4316 /* If the acl buffer was too short, redo open with longer one.
4317 Wouldn't need to do this if there were some system imposed
4318 limit on the size of an ACL, but I can't find any such. */
4319 {
4320 xabpro.xab$l_aclbuf = (char *) alloca (xabpro.xab$w_acllen);
4321 xabpro.xab$w_aclsiz = xabpro.xab$w_acllen;
4322 if (SYS$OPEN (&fab, 0, 0) & 1)
4323 SYS$CLOSE (&fab, 0, 0);
4324 else
4325 old = 0;
4326 }
4327 }
4328 else
4329 xabpro.xab$l_aclbuf = 0;
4330 }
4331 else
4332 old = 0;
4333 }
4334 fab.fab$l_fna = new;
4335 fab.fab$b_fns = strlen (new);
4336 if (!old)
4337 {
4338 fab.fab$l_xab = 0;
4339 fab.fab$b_rfm = vms_stmlf_recfm ? FAB$C_STMLF : FAB$C_VAR;
4340 fab.fab$b_rat = FAB$M_CR;
4341 }
4342
4343 /* Set the file protections such that we will be able to manipulate
4344 this file. Once we are done writing and renaming it, we will set
4345 the protections back. */
4346 if (old)
4347 fab_final_pro = xabpro.xab$w_pro;
4348 else
4349 SYS$SETDFPROT (0, &fab_final_pro);
4350 xabpro.xab$w_pro &= 0xff0f; /* set O:rewd for now. This is set back later. */
4351
4352 /* Create the new file with either default attrs or attrs copied
4353 from old file. */
4354 if (!(SYS$CREATE (&fab, 0, 0) & 1))
4355 return -1;
4356 SYS$CLOSE (&fab, 0, 0);
4357 /* As this is a "replacement" for creat, return a file descriptor
4358 opened for writing. */
4359 return open (new, O_WRONLY);
4360 }
4361
4362 #ifdef creat
4363 #undef creat
4364 #include <varargs.h>
4365 #ifdef __GNUC__
4366 #ifndef va_count
4367 #define va_count(X) ((X) = *(((int *) &(va_alist)) - 1))
4368 #endif
4369 #endif
4370
4371 int
4372 sys_creat (va_alist)
4373 va_dcl
4374 {
4375 va_list list_incrementer;
4376 char *name;
4377 int mode;
4378 int rfd; /* related file descriptor */
4379 int fd; /* Our new file descriptor */
4380 int count;
4381 struct stat st_buf;
4382 char rfm[12];
4383 char rat[15];
4384 char mrs[13];
4385 char fsz[13];
4386 extern int vms_stmlf_recfm;
4387
4388 va_count (count);
4389 va_start (list_incrementer);
4390 name = va_arg (list_incrementer, char *);
4391 mode = va_arg (list_incrementer, int);
4392 if (count > 2)
4393 rfd = va_arg (list_incrementer, int);
4394 va_end (list_incrementer);
4395 if (count > 2)
4396 {
4397 /* Use information from the related file descriptor to set record
4398 format of the newly created file. */
4399 fstat (rfd, &st_buf);
4400 switch (st_buf.st_fab_rfm)
4401 {
4402 case FAB$C_FIX:
4403 strcpy (rfm, "rfm = fix");
4404 sprintf (mrs, "mrs = %d", st_buf.st_fab_mrs);
4405 strcpy (rat, "rat = ");
4406 if (st_buf.st_fab_rat & FAB$M_CR)
4407 strcat (rat, "cr");
4408 else if (st_buf.st_fab_rat & FAB$M_FTN)
4409 strcat (rat, "ftn");
4410 else if (st_buf.st_fab_rat & FAB$M_PRN)
4411 strcat (rat, "prn");
4412 if (st_buf.st_fab_rat & FAB$M_BLK)
4413 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4414 strcat (rat, ", blk");
4415 else
4416 strcat (rat, "blk");
4417 return creat (name, 0, rfm, rat, mrs);
4418
4419 case FAB$C_VFC:
4420 strcpy (rfm, "rfm = vfc");
4421 sprintf (fsz, "fsz = %d", st_buf.st_fab_fsz);
4422 strcpy (rat, "rat = ");
4423 if (st_buf.st_fab_rat & FAB$M_CR)
4424 strcat (rat, "cr");
4425 else if (st_buf.st_fab_rat & FAB$M_FTN)
4426 strcat (rat, "ftn");
4427 else if (st_buf.st_fab_rat & FAB$M_PRN)
4428 strcat (rat, "prn");
4429 if (st_buf.st_fab_rat & FAB$M_BLK)
4430 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4431 strcat (rat, ", blk");
4432 else
4433 strcat (rat, "blk");
4434 return creat (name, 0, rfm, rat, fsz);
4435
4436 case FAB$C_STM:
4437 strcpy (rfm, "rfm = stm");
4438 break;
4439
4440 case FAB$C_STMCR:
4441 strcpy (rfm, "rfm = stmcr");
4442 break;
4443
4444 case FAB$C_STMLF:
4445 strcpy (rfm, "rfm = stmlf");
4446 break;
4447
4448 case FAB$C_UDF:
4449 strcpy (rfm, "rfm = udf");
4450 break;
4451
4452 case FAB$C_VAR:
4453 strcpy (rfm, "rfm = var");
4454 break;
4455 }
4456 strcpy (rat, "rat = ");
4457 if (st_buf.st_fab_rat & FAB$M_CR)
4458 strcat (rat, "cr");
4459 else if (st_buf.st_fab_rat & FAB$M_FTN)
4460 strcat (rat, "ftn");
4461 else if (st_buf.st_fab_rat & FAB$M_PRN)
4462 strcat (rat, "prn");
4463 if (st_buf.st_fab_rat & FAB$M_BLK)
4464 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4465 strcat (rat, ", blk");
4466 else
4467 strcat (rat, "blk");
4468 }
4469 else
4470 {
4471 strcpy (rfm, vms_stmlf_recfm ? "rfm = stmlf" : "rfm=var");
4472 strcpy (rat, "rat=cr");
4473 }
4474 /* Until the VAX C RTL fixes the many bugs with modes, always use
4475 mode 0 to get the user's default protection. */
4476 fd = creat (name, 0, rfm, rat);
4477 if (fd < 0 && errno == EEXIST)
4478 {
4479 if (unlink (name) < 0)
4480 report_file_error ("delete", build_string (name));
4481 fd = creat (name, 0, rfm, rat);
4482 }
4483 return fd;
4484 }
4485 #endif /* creat */
4486
4487 /* fwrite to stdout is S L O W. Speed it up by using fputc...*/
4488 int
4489 sys_fwrite (ptr, size, num, fp)
4490 register char * ptr;
4491 FILE * fp;
4492 {
4493 register int tot = num * size;
4494
4495 while (tot--)
4496 fputc (*ptr++, fp);
4497 return num;
4498 }
4499
4500 /*
4501 * The VMS C library routine creat actually creates a new version of an
4502 * existing file rather than truncating the old version. There are times
4503 * when this is not the desired behavior, for instance, when writing an
4504 * auto save file (you only want one version), or when you don't have
4505 * write permission in the directory containing the file (but the file
4506 * itself is writable). Hence this routine, which is equivalent to
4507 * "close (creat (fn, 0));" on Unix if fn already exists.
4508 */
4509 int
4510 vms_truncate (fn)
4511 char *fn;
4512 {
4513 struct FAB xfab = cc$rms_fab;
4514 struct RAB xrab = cc$rms_rab;
4515 int status;
4516
4517 xfab.fab$l_fop = FAB$M_TEF; /* free allocated but unused blocks on close */
4518 xfab.fab$b_fac = FAB$M_TRN | FAB$M_GET; /* allow truncate and get access */
4519 xfab.fab$b_shr = FAB$M_NIL; /* allow no sharing - file must be locked */
4520 xfab.fab$l_fna = fn;
4521 xfab.fab$b_fns = strlen (fn);
4522 xfab.fab$l_dna = ";0"; /* default to latest version of the file */
4523 xfab.fab$b_dns = 2;
4524 xrab.rab$l_fab = &xfab;
4525
4526 /* This gibberish opens the file, positions to the first record, and
4527 deletes all records from there until the end of file. */
4528 if ((SYS$OPEN (&xfab) & 01) == 01)
4529 {
4530 if ((SYS$CONNECT (&xrab) & 01) == 01 &&
4531 (SYS$FIND (&xrab) & 01) == 01 &&
4532 (SYS$TRUNCATE (&xrab) & 01) == 01)
4533 status = 0;
4534 else
4535 status = -1;
4536 }
4537 else
4538 status = -1;
4539 SYS$CLOSE (&xfab);
4540 return status;
4541 }
4542
4543 /* Define this symbol to actually read SYSUAF.DAT. This requires either
4544 SYSPRV or a readable SYSUAF.DAT. */
4545
4546 #ifdef READ_SYSUAF
4547 /*
4548 * getuaf.c
4549 *
4550 * Routine to read the VMS User Authorization File and return
4551 * a specific user's record.
4552 */
4553
4554 static struct UAF retuaf;
4555
4556 struct UAF *
4557 get_uaf_name (uname)
4558 char * uname;
4559 {
4560 register status;
4561 struct FAB uaf_fab;
4562 struct RAB uaf_rab;
4563
4564 uaf_fab = cc$rms_fab;
4565 uaf_rab = cc$rms_rab;
4566 /* initialize fab fields */
4567 uaf_fab.fab$l_fna = "SYS$SYSTEM:SYSUAF.DAT";
4568 uaf_fab.fab$b_fns = 21;
4569 uaf_fab.fab$b_fac = FAB$M_GET;
4570 uaf_fab.fab$b_org = FAB$C_IDX;
4571 uaf_fab.fab$b_shr = FAB$M_GET|FAB$M_PUT|FAB$M_UPD|FAB$M_DEL;
4572 /* initialize rab fields */
4573 uaf_rab.rab$l_fab = &uaf_fab;
4574 /* open the User Authorization File */
4575 status = SYS$OPEN (&uaf_fab);
4576 if (!(status&1))
4577 {
4578 errno = EVMSERR;
4579 vaxc$errno = status;
4580 return 0;
4581 }
4582 status = SYS$CONNECT (&uaf_rab);
4583 if (!(status&1))
4584 {
4585 errno = EVMSERR;
4586 vaxc$errno = status;
4587 return 0;
4588 }
4589 /* read the requested record - index is in uname */
4590 uaf_rab.rab$l_kbf = uname;
4591 uaf_rab.rab$b_ksz = strlen (uname);
4592 uaf_rab.rab$b_rac = RAB$C_KEY;
4593 uaf_rab.rab$l_ubf = (char *)&retuaf;
4594 uaf_rab.rab$w_usz = sizeof retuaf;
4595 status = SYS$GET (&uaf_rab);
4596 if (!(status&1))
4597 {
4598 errno = EVMSERR;
4599 vaxc$errno = status;
4600 return 0;
4601 }
4602 /* close the User Authorization File */
4603 status = SYS$DISCONNECT (&uaf_rab);
4604 if (!(status&1))
4605 {
4606 errno = EVMSERR;
4607 vaxc$errno = status;
4608 return 0;
4609 }
4610 status = SYS$CLOSE (&uaf_fab);
4611 if (!(status&1))
4612 {
4613 errno = EVMSERR;
4614 vaxc$errno = status;
4615 return 0;
4616 }
4617 return &retuaf;
4618 }
4619
4620 struct UAF *
4621 get_uaf_uic (uic)
4622 unsigned long uic;
4623 {
4624 register status;
4625 struct FAB uaf_fab;
4626 struct RAB uaf_rab;
4627
4628 uaf_fab = cc$rms_fab;
4629 uaf_rab = cc$rms_rab;
4630 /* initialize fab fields */
4631 uaf_fab.fab$l_fna = "SYS$SYSTEM:SYSUAF.DAT";
4632 uaf_fab.fab$b_fns = 21;
4633 uaf_fab.fab$b_fac = FAB$M_GET;
4634 uaf_fab.fab$b_org = FAB$C_IDX;
4635 uaf_fab.fab$b_shr = FAB$M_GET|FAB$M_PUT|FAB$M_UPD|FAB$M_DEL;
4636 /* initialize rab fields */
4637 uaf_rab.rab$l_fab = &uaf_fab;
4638 /* open the User Authorization File */
4639 status = SYS$OPEN (&uaf_fab);
4640 if (!(status&1))
4641 {
4642 errno = EVMSERR;
4643 vaxc$errno = status;
4644 return 0;
4645 }
4646 status = SYS$CONNECT (&uaf_rab);
4647 if (!(status&1))
4648 {
4649 errno = EVMSERR;
4650 vaxc$errno = status;
4651 return 0;
4652 }
4653 /* read the requested record - index is in uic */
4654 uaf_rab.rab$b_krf = 1; /* 1st alternate key */
4655 uaf_rab.rab$l_kbf = (char *) &uic;
4656 uaf_rab.rab$b_ksz = sizeof uic;
4657 uaf_rab.rab$b_rac = RAB$C_KEY;
4658 uaf_rab.rab$l_ubf = (char *)&retuaf;
4659 uaf_rab.rab$w_usz = sizeof retuaf;
4660 status = SYS$GET (&uaf_rab);
4661 if (!(status&1))
4662 {
4663 errno = EVMSERR;
4664 vaxc$errno = status;
4665 return 0;
4666 }
4667 /* close the User Authorization File */
4668 status = SYS$DISCONNECT (&uaf_rab);
4669 if (!(status&1))
4670 {
4671 errno = EVMSERR;
4672 vaxc$errno = status;
4673 return 0;
4674 }
4675 status = SYS$CLOSE (&uaf_fab);
4676 if (!(status&1))
4677 {
4678 errno = EVMSERR;
4679 vaxc$errno = status;
4680 return 0;
4681 }
4682 return &retuaf;
4683 }
4684
4685 static struct passwd retpw;
4686
4687 struct passwd *
4688 cnv_uaf_pw (up)
4689 struct UAF * up;
4690 {
4691 char * ptr;
4692
4693 /* copy these out first because if the username is 32 chars, the next
4694 section will overwrite the first byte of the UIC */
4695 retpw.pw_uid = up->uaf$w_mem;
4696 retpw.pw_gid = up->uaf$w_grp;
4697
4698 /* I suppose this is not the best style, to possibly overwrite one
4699 byte beyond the end of the field, but what the heck... */
4700 ptr = &up->uaf$t_username[UAF$S_USERNAME];
4701 while (ptr[-1] == ' ')
4702 ptr--;
4703 *ptr = '\0';
4704 strcpy (retpw.pw_name, up->uaf$t_username);
4705
4706 /* the rest of these are counted ascii strings */
4707 strncpy (retpw.pw_gecos, &up->uaf$t_owner[1], up->uaf$t_owner[0]);
4708 retpw.pw_gecos[up->uaf$t_owner[0]] = '\0';
4709 strncpy (retpw.pw_dir, &up->uaf$t_defdev[1], up->uaf$t_defdev[0]);
4710 retpw.pw_dir[up->uaf$t_defdev[0]] = '\0';
4711 strncat (retpw.pw_dir, &up->uaf$t_defdir[1], up->uaf$t_defdir[0]);
4712 retpw.pw_dir[up->uaf$t_defdev[0] + up->uaf$t_defdir[0]] = '\0';
4713 strncpy (retpw.pw_shell, &up->uaf$t_defcli[1], up->uaf$t_defcli[0]);
4714 retpw.pw_shell[up->uaf$t_defcli[0]] = '\0';
4715
4716 return &retpw;
4717 }
4718 #else /* not READ_SYSUAF */
4719 static struct passwd retpw;
4720 #endif /* not READ_SYSUAF */
4721
4722 struct passwd *
4723 getpwnam (name)
4724 char * name;
4725 {
4726 #ifdef READ_SYSUAF
4727 struct UAF *up;
4728 #else
4729 char * user;
4730 char * dir;
4731 unsigned char * full;
4732 #endif /* READ_SYSUAF */
4733 char *ptr = name;
4734
4735 while (*ptr)
4736 {
4737 if ('a' <= *ptr && *ptr <= 'z')
4738 *ptr -= 040;
4739 ptr++;
4740 }
4741 #ifdef READ_SYSUAF
4742 if (!(up = get_uaf_name (name)))
4743 return 0;
4744 return cnv_uaf_pw (up);
4745 #else
4746 if (strcmp (name, getenv ("USER")) == 0)
4747 {
4748 retpw.pw_uid = getuid ();
4749 retpw.pw_gid = getgid ();
4750 strcpy (retpw.pw_name, name);
4751 if (full = egetenv ("FULLNAME"))
4752 strcpy (retpw.pw_gecos, full);
4753 else
4754 *retpw.pw_gecos = '\0';
4755 strcpy (retpw.pw_dir, egetenv ("HOME"));
4756 *retpw.pw_shell = '\0';
4757 return &retpw;
4758 }
4759 else
4760 return 0;
4761 #endif /* not READ_SYSUAF */
4762 }
4763
4764 struct passwd *
4765 getpwuid (uid)
4766 unsigned long uid;
4767 {
4768 #ifdef READ_SYSUAF
4769 struct UAF * up;
4770
4771 if (!(up = get_uaf_uic (uid)))
4772 return 0;
4773 return cnv_uaf_pw (up);
4774 #else
4775 if (uid == sys_getuid ())
4776 return getpwnam (egetenv ("USER"));
4777 else
4778 return 0;
4779 #endif /* not READ_SYSUAF */
4780 }
4781
4782 /* return total address space available to the current process. This is
4783 the sum of the current p0 size, p1 size and free page table entries
4784 available. */
4785 int
4786 vlimit ()
4787 {
4788 int item_code;
4789 unsigned long free_pages;
4790 unsigned long frep0va;
4791 unsigned long frep1va;
4792 register status;
4793
4794 item_code = JPI$_FREPTECNT;
4795 if (((status = LIB$GETJPI (&item_code, 0, 0, &free_pages)) & 1) == 0)
4796 {
4797 errno = EVMSERR;
4798 vaxc$errno = status;
4799 return -1;
4800 }
4801 free_pages *= 512;
4802
4803 item_code = JPI$_FREP0VA;
4804 if (((status = LIB$GETJPI (&item_code, 0, 0, &frep0va)) & 1) == 0)
4805 {
4806 errno = EVMSERR;
4807 vaxc$errno = status;
4808 return -1;
4809 }
4810 item_code = JPI$_FREP1VA;
4811 if (((status = LIB$GETJPI (&item_code, 0, 0, &frep1va)) & 1) == 0)
4812 {
4813 errno = EVMSERR;
4814 vaxc$errno = status;
4815 return -1;
4816 }
4817
4818 return free_pages + frep0va + (0x7fffffff - frep1va);
4819 }
4820
4821 int
4822 define_logical_name (varname, string)
4823 char *varname;
4824 char *string;
4825 {
4826 struct dsc$descriptor_s strdsc =
4827 {strlen (string), DSC$K_DTYPE_T, DSC$K_CLASS_S, string};
4828 struct dsc$descriptor_s envdsc =
4829 {strlen (varname), DSC$K_DTYPE_T, DSC$K_CLASS_S, varname};
4830 struct dsc$descriptor_s lnmdsc =
4831 {7, DSC$K_DTYPE_T, DSC$K_CLASS_S, "LNM$JOB"};
4832
4833 return LIB$SET_LOGICAL (&envdsc, &strdsc, &lnmdsc, 0, 0);
4834 }
4835
4836 int
4837 delete_logical_name (varname)
4838 char *varname;
4839 {
4840 struct dsc$descriptor_s envdsc =
4841 {strlen (varname), DSC$K_DTYPE_T, DSC$K_CLASS_S, varname};
4842 struct dsc$descriptor_s lnmdsc =
4843 {7, DSC$K_DTYPE_T, DSC$K_CLASS_S, "LNM$JOB"};
4844
4845 return LIB$DELETE_LOGICAL (&envdsc, &lnmdsc);
4846 }
4847
4848 int
4849 ulimit ()
4850 {
4851 return 0;
4852 }
4853
4854 int
4855 setpgrp ()
4856 {
4857 return 0;
4858 }
4859
4860 int
4861 execvp ()
4862 {
4863 error ("execvp system call not implemented");
4864 return -1;
4865 }
4866
4867 int
4868 rename (from, to)
4869 char *from, *to;
4870 {
4871 int status;
4872 struct FAB from_fab = cc$rms_fab, to_fab = cc$rms_fab;
4873 struct NAM from_nam = cc$rms_nam, to_nam = cc$rms_nam;
4874 char from_esn[NAM$C_MAXRSS];
4875 char to_esn[NAM$C_MAXRSS];
4876
4877 from_fab.fab$l_fna = from;
4878 from_fab.fab$b_fns = strlen (from);
4879 from_fab.fab$l_nam = &from_nam;
4880 from_fab.fab$l_fop = FAB$M_NAM;
4881
4882 from_nam.nam$l_esa = from_esn;
4883 from_nam.nam$b_ess = sizeof from_esn;
4884
4885 to_fab.fab$l_fna = to;
4886 to_fab.fab$b_fns = strlen (to);
4887 to_fab.fab$l_nam = &to_nam;
4888 to_fab.fab$l_fop = FAB$M_NAM;
4889
4890 to_nam.nam$l_esa = to_esn;
4891 to_nam.nam$b_ess = sizeof to_esn;
4892
4893 status = SYS$RENAME (&from_fab, 0, 0, &to_fab);
4894
4895 if (status & 1)
4896 return 0;
4897 else
4898 {
4899 if (status == RMS$_DEV)
4900 errno = EXDEV;
4901 else
4902 errno = EVMSERR;
4903 vaxc$errno = status;
4904 return -1;
4905 }
4906 }
4907
4908 /* This function renames a file like `rename', but it strips
4909 the version number from the "to" filename, such that the "to" file is
4910 will always be a new version. It also sets the file protection once it is
4911 finished. The protection that we will use is stored in fab_final_pro,
4912 and was set when we did a creat_copy_attrs to create the file that we
4913 are renaming.
4914
4915 We could use the chmod function, but Eunichs uses 3 bits per user category
4916 to describe the protection, and VMS uses 4 (write and delete are separate
4917 bits). To maintain portability, the VMS implementation of `chmod' wires
4918 the W and D bits together. */
4919
4920
4921 static struct fibdef fib; /* We need this initialized to zero */
4922 char vms_file_written[NAM$C_MAXRSS];
4923
4924 int
4925 rename_sans_version (from,to)
4926 char *from, *to;
4927 {
4928 short int chan;
4929 int stat;
4930 short int iosb[4];
4931 int status;
4932 struct FAB to_fab = cc$rms_fab;
4933 struct NAM to_nam = cc$rms_nam;
4934 struct dsc$descriptor fib_d ={sizeof (fib),0,0,(char*) &fib};
4935 struct dsc$descriptor fib_attr[2]
4936 = {{sizeof (fab_final_pro),ATR$C_FPRO,0,(char*) &fab_final_pro},{0,0,0,0}};
4937 char to_esn[NAM$C_MAXRSS];
4938
4939 $DESCRIPTOR (disk,to_esn);
4940
4941 to_fab.fab$l_fna = to;
4942 to_fab.fab$b_fns = strlen (to);
4943 to_fab.fab$l_nam = &to_nam;
4944 to_fab.fab$l_fop = FAB$M_NAM;
4945
4946 to_nam.nam$l_esa = to_esn;
4947 to_nam.nam$b_ess = sizeof to_esn;
4948
4949 status = SYS$PARSE (&to_fab, 0, 0); /* figure out the full file name */
4950
4951 if (to_nam.nam$l_fnb && NAM$M_EXP_VER)
4952 *(to_nam.nam$l_ver) = '\0';
4953
4954 stat = rename (from, to_esn);
4955 if (stat < 0)
4956 return stat;
4957
4958 strcpy (vms_file_written, to_esn);
4959
4960 to_fab.fab$l_fna = vms_file_written; /* this points to the versionless name */
4961 to_fab.fab$b_fns = strlen (vms_file_written);
4962
4963 /* Now set the file protection to the correct value */
4964 SYS$OPEN (&to_fab, 0, 0); /* This fills in the nam$w_fid fields */
4965
4966 /* Copy these fields into the fib */
4967 fib.fib$r_fid_overlay.fib$w_fid[0] = to_nam.nam$w_fid[0];
4968 fib.fib$r_fid_overlay.fib$w_fid[1] = to_nam.nam$w_fid[1];
4969 fib.fib$r_fid_overlay.fib$w_fid[2] = to_nam.nam$w_fid[2];
4970
4971 SYS$CLOSE (&to_fab, 0, 0);
4972
4973 stat = SYS$ASSIGN (&disk, &chan, 0, 0); /* open a channel to the disk */
4974 if (!stat)
4975 LIB$SIGNAL (stat);
4976 stat = SYS$QIOW (0, chan, IO$_MODIFY, iosb, 0, 0, &fib_d,
4977 0, 0, 0, &fib_attr, 0);
4978 if (!stat)
4979 LIB$SIGNAL (stat);
4980 stat = SYS$DASSGN (chan);
4981 if (!stat)
4982 LIB$SIGNAL (stat);
4983 strcpy (vms_file_written, to_esn); /* We will write this to the terminal*/
4984 return 0;
4985 }
4986
4987 int
4988 link (file, new)
4989 char * file, * new;
4990 {
4991 register status;
4992 struct FAB fab;
4993 struct NAM nam;
4994 unsigned short fid[3];
4995 char esa[NAM$C_MAXRSS];
4996
4997 fab = cc$rms_fab;
4998 fab.fab$l_fop = FAB$M_OFP;
4999 fab.fab$l_fna = file;
5000 fab.fab$b_fns = strlen (file);
5001 fab.fab$l_nam = &nam;
5002
5003 nam = cc$rms_nam;
5004 nam.nam$l_esa = esa;
5005 nam.nam$b_ess = NAM$C_MAXRSS;
5006
5007 status = SYS$PARSE (&fab);
5008 if ((status & 1) == 0)
5009 {
5010 errno = EVMSERR;
5011 vaxc$errno = status;
5012 return -1;
5013 }
5014 status = SYS$SEARCH (&fab);
5015 if ((status & 1) == 0)
5016 {
5017 errno = EVMSERR;
5018 vaxc$errno = status;
5019 return -1;
5020 }
5021
5022 fid[0] = nam.nam$w_fid[0];
5023 fid[1] = nam.nam$w_fid[1];
5024 fid[2] = nam.nam$w_fid[2];
5025
5026 fab.fab$l_fna = new;
5027 fab.fab$b_fns = strlen (new);
5028
5029 status = SYS$PARSE (&fab);
5030 if ((status & 1) == 0)
5031 {
5032 errno = EVMSERR;
5033 vaxc$errno = status;
5034 return -1;
5035 }
5036
5037 nam.nam$w_fid[0] = fid[0];
5038 nam.nam$w_fid[1] = fid[1];
5039 nam.nam$w_fid[2] = fid[2];
5040
5041 nam.nam$l_esa = nam.nam$l_name;
5042 nam.nam$b_esl = nam.nam$b_name + nam.nam$b_type + nam.nam$b_ver;
5043
5044 status = SYS$ENTER (&fab);
5045 if ((status & 1) == 0)
5046 {
5047 errno = EVMSERR;
5048 vaxc$errno = status;
5049 return -1;
5050 }
5051
5052 return 0;
5053 }
5054
5055 void
5056 croak (badfunc)
5057 char *badfunc;
5058 {
5059 printf ("%s not yet implemented\r\n", badfunc);
5060 reset_sys_modes ();
5061 exit (1);
5062 }
5063
5064 long
5065 random ()
5066 {
5067 /* Arrange to return a range centered on zero. */
5068 return rand () - (1 << 30);
5069 }
5070
5071 void
5072 srandom (seed)
5073 {
5074 srand (seed);
5075 }
5076 #endif /* VMS */
5077 \f
5078 #ifdef AIXHFT
5079
5080 /* Called from init_sys_modes. */
5081 void
5082 hft_init ()
5083 {
5084 int junk;
5085
5086 /* If we're not on an HFT we shouldn't do any of this. We determine
5087 if we are on an HFT by trying to get an HFT error code. If this
5088 call fails, we're not on an HFT. */
5089 #ifdef IBMR2AIX
5090 if (ioctl (0, HFQERROR, &junk) < 0)
5091 return;
5092 #else /* not IBMR2AIX */
5093 if (ioctl (0, HFQEIO, 0) < 0)
5094 return;
5095 #endif /* not IBMR2AIX */
5096
5097 /* On AIX the default hft keyboard mapping uses backspace rather than delete
5098 as the rubout key's ASCII code. Here this is changed. The bug is that
5099 there's no way to determine the old mapping, so in reset_sys_modes
5100 we need to assume that the normal map had been present. Of course, this
5101 code also doesn't help if on a terminal emulator which doesn't understand
5102 HFT VTD's. */
5103 {
5104 struct hfbuf buf;
5105 struct hfkeymap keymap;
5106
5107 buf.hf_bufp = (char *)&keymap;
5108 buf.hf_buflen = sizeof (keymap);
5109 keymap.hf_nkeys = 2;
5110 keymap.hfkey[0].hf_kpos = 15;
5111 keymap.hfkey[0].hf_kstate = HFMAPCHAR | HFSHFNONE;
5112 #ifdef IBMR2AIX
5113 keymap.hfkey[0].hf_keyidh = '<';
5114 #else /* not IBMR2AIX */
5115 keymap.hfkey[0].hf_page = '<';
5116 #endif /* not IBMR2AIX */
5117 keymap.hfkey[0].hf_char = 127;
5118 keymap.hfkey[1].hf_kpos = 15;
5119 keymap.hfkey[1].hf_kstate = HFMAPCHAR | HFSHFSHFT;
5120 #ifdef IBMR2AIX
5121 keymap.hfkey[1].hf_keyidh = '<';
5122 #else /* not IBMR2AIX */
5123 keymap.hfkey[1].hf_page = '<';
5124 #endif /* not IBMR2AIX */
5125 keymap.hfkey[1].hf_char = 127;
5126 hftctl (0, HFSKBD, &buf);
5127 }
5128 /* The HFT system on AIX doesn't optimize for scrolling, so it's really ugly
5129 at times. */
5130 line_ins_del_ok = char_ins_del_ok = 0;
5131 }
5132
5133 /* Reset the rubout key to backspace. */
5134
5135 void
5136 hft_reset ()
5137 {
5138 struct hfbuf buf;
5139 struct hfkeymap keymap;
5140 int junk;
5141
5142 #ifdef IBMR2AIX
5143 if (ioctl (0, HFQERROR, &junk) < 0)
5144 return;
5145 #else /* not IBMR2AIX */
5146 if (ioctl (0, HFQEIO, 0) < 0)
5147 return;
5148 #endif /* not IBMR2AIX */
5149
5150 buf.hf_bufp = (char *)&keymap;
5151 buf.hf_buflen = sizeof (keymap);
5152 keymap.hf_nkeys = 2;
5153 keymap.hfkey[0].hf_kpos = 15;
5154 keymap.hfkey[0].hf_kstate = HFMAPCHAR | HFSHFNONE;
5155 #ifdef IBMR2AIX
5156 keymap.hfkey[0].hf_keyidh = '<';
5157 #else /* not IBMR2AIX */
5158 keymap.hfkey[0].hf_page = '<';
5159 #endif /* not IBMR2AIX */
5160 keymap.hfkey[0].hf_char = 8;
5161 keymap.hfkey[1].hf_kpos = 15;
5162 keymap.hfkey[1].hf_kstate = HFMAPCHAR | HFSHFSHFT;
5163 #ifdef IBMR2AIX
5164 keymap.hfkey[1].hf_keyidh = '<';
5165 #else /* not IBMR2AIX */
5166 keymap.hfkey[1].hf_page = '<';
5167 #endif /* not IBMR2AIX */
5168 keymap.hfkey[1].hf_char = 8;
5169 hftctl (0, HFSKBD, &buf);
5170 }
5171
5172 #endif /* AIXHFT */
5173
5174 #ifdef USE_DL_STUBS
5175
5176 /* These are included on Sunos 4.1 when we do not use shared libraries.
5177 X11 libraries may refer to these functions but (we hope) do not
5178 actually call them. */
5179
5180 void *
5181 dlopen ()
5182 {
5183 return 0;
5184 }
5185
5186 void *
5187 dlsym ()
5188 {
5189 return 0;
5190 }
5191
5192 int
5193 dlclose ()
5194 {
5195 return -1;
5196 }
5197
5198 #endif /* USE_DL_STUBS */
5199 \f
5200 #ifndef BSTRING
5201
5202 #ifndef bzero
5203
5204 void
5205 bzero (b, length)
5206 register char *b;
5207 register int length;
5208 {
5209 #ifdef VMS
5210 short zero = 0;
5211 long max_str = 65535;
5212
5213 while (length > max_str) {
5214 (void) LIB$MOVC5 (&zero, &zero, &zero, &max_str, b);
5215 length -= max_str;
5216 b += max_str;
5217 }
5218 max_str = length;
5219 (void) LIB$MOVC5 (&zero, &zero, &zero, &max_str, b);
5220 #else
5221 while (length-- > 0)
5222 *b++ = 0;
5223 #endif /* not VMS */
5224 }
5225
5226 #endif /* no bzero */
5227 #endif /* BSTRING */
5228
5229 #if (!defined (BSTRING) && !defined (bcopy)) || defined (NEED_BCOPY)
5230 #undef bcopy
5231
5232 /* Saying `void' requires a declaration, above, where bcopy is used
5233 and that declaration causes pain for systems where bcopy is a macro. */
5234 bcopy (b1, b2, length)
5235 register char *b1;
5236 register char *b2;
5237 register int length;
5238 {
5239 #ifdef VMS
5240 long max_str = 65535;
5241
5242 while (length > max_str) {
5243 (void) LIB$MOVC3 (&max_str, b1, b2);
5244 length -= max_str;
5245 b1 += max_str;
5246 b2 += max_str;
5247 }
5248 max_str = length;
5249 (void) LIB$MOVC3 (&length, b1, b2);
5250 #else
5251 while (length-- > 0)
5252 *b2++ = *b1++;
5253 #endif /* not VMS */
5254 }
5255 #endif /* (!defined (BSTRING) && !defined (bcopy)) || defined (NEED_BCOPY) */
5256
5257 #ifndef BSTRING
5258 #ifndef bcmp
5259 int
5260 bcmp (b1, b2, length) /* This could be a macro! */
5261 register char *b1;
5262 register char *b2;
5263 register int length;
5264 {
5265 #ifdef VMS
5266 struct dsc$descriptor_s src1 = {length, DSC$K_DTYPE_T, DSC$K_CLASS_S, b1};
5267 struct dsc$descriptor_s src2 = {length, DSC$K_DTYPE_T, DSC$K_CLASS_S, b2};
5268
5269 return STR$COMPARE (&src1, &src2);
5270 #else
5271 while (length-- > 0)
5272 if (*b1++ != *b2++)
5273 return 1;
5274
5275 return 0;
5276 #endif /* not VMS */
5277 }
5278 #endif /* no bcmp */
5279 #endif /* not BSTRING */
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