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