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[! emacs]: #undef REL_ALLOC.
[bpt/emacs.git] / src / sysdep.c
1 /* Interfaces to system-dependent kernel and library entries.
2 Copyright (C) 1985, 86, 87, 88, 93, 94, 95 Free Software Foundation, Inc.
3
4 This file is part of GNU Emacs.
5
6 GNU Emacs is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
9 any later version.
10
11 GNU Emacs is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with GNU Emacs; see the file COPYING. If not, write to
18 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
19
20
21 #include <signal.h>
22 #include <setjmp.h>
23
24 #include <config.h>
25 #include "lisp.h"
26 #include "blockinput.h"
27 #undef NULL
28
29 #define min(x,y) ((x) > (y) ? (y) : (x))
30
31 /* In this file, open, read and write refer to the system calls,
32 not our sugared interfaces sys_open, sys_read and sys_write.
33 Contrariwise, for systems where we use the system calls directly,
34 define sys_read, etc. here as aliases for them. */
35 #ifndef read
36 #define sys_read read
37 #define sys_write write
38 #endif /* `read' is not a macro */
39
40 #undef read
41 #undef write
42
43 #ifdef WINDOWSNT
44 #define read _read
45 #define write _write
46 #include <windows.h>
47 extern int errno;
48 #endif /* not WINDOWSNT */
49
50 #ifndef close
51 #define sys_close close
52 #else
53 #undef close
54 #endif
55
56 #ifndef open
57 #define sys_open open
58 #else /* `open' is a macro */
59 #undef open
60 #endif /* `open' is a macro */
61
62 /* Does anyone other than VMS need this? */
63 #ifndef fwrite
64 #define sys_fwrite fwrite
65 #else
66 #undef fwrite
67 #endif
68
69 #ifndef HAVE_H_ERRNO
70 extern int h_errno;
71 #endif
72
73 #include <stdio.h>
74 #include <sys/types.h>
75 #include <sys/stat.h>
76 #include <errno.h>
77
78 /* Get _POSIX_VDISABLE, if it is available. */
79 #ifdef HAVE_UNISTD_H
80 #include <unistd.h>
81 #endif
82
83 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida, MW Aug 1993 */
84 #include <dos.h>
85 #include "dosfns.h"
86 #include "msdos.h"
87 #include <sys/param.h>
88 #endif
89
90 extern int errno;
91
92 #ifdef VMS
93 #include <rms.h>
94 #include <ttdef.h>
95 #include <tt2def.h>
96 #include <iodef.h>
97 #include <ssdef.h>
98 #include <descrip.h>
99 #include <fibdef.h>
100 #include <atrdef.h>
101 #include <ctype.h>
102 #include <string.h>
103 #ifdef __GNUC__
104 #include <sys/file.h>
105 #else
106 #include <file.h>
107 #endif
108 #undef F_SETFL
109 #ifndef RAB$C_BID
110 #include <rab.h>
111 #endif
112 #define MAXIOSIZE (32 * PAGESIZE) /* Don't I/O more than 32 blocks at a time */
113 #endif /* VMS */
114
115 #ifndef BSD4_1
116 #ifdef BSD /* this is done this way to avoid defined (BSD) || defined (USG)
117 because the vms compiler doesn't grok `defined' */
118 #include <fcntl.h>
119 #endif
120 #ifdef USG
121 #ifndef USG5
122 #include <fcntl.h>
123 #endif
124 #endif
125 #endif /* not 4.1 bsd */
126
127 #ifndef MSDOS
128 #include <sys/ioctl.h>
129 #endif
130 #include "systty.h"
131 #include "syswait.h"
132
133 #ifdef BROKEN_TIOCGWINSZ
134 #undef TIOCGWINSZ
135 #undef TIOCSWINSZ
136 #endif
137
138 #ifdef USG
139 #include <sys/utsname.h>
140 #include <string.h>
141 #ifndef MEMORY_IN_STRING_H
142 #include <memory.h>
143 #endif
144 #if defined (TIOCGWINSZ) || defined (ISC4_0)
145 #ifdef NEED_SIOCTL
146 #include <sys/sioctl.h>
147 #endif
148 #ifdef NEED_PTEM_H
149 #include <sys/stream.h>
150 #include <sys/ptem.h>
151 #endif
152 #endif /* TIOCGWINSZ or ISC4_0 */
153 #endif /* USG */
154
155 extern int quit_char;
156
157 #include "frame.h"
158 #include "window.h"
159 #include "termhooks.h"
160 #include "termchar.h"
161 #include "termopts.h"
162 #include "dispextern.h"
163 #include "process.h"
164
165 #ifdef WINDOWSNT
166 #include <direct.h>
167 /* In process.h which conflicts with the local copy. */
168 #define _P_WAIT 0
169 int _CRTAPI1 _spawnlp (int, const char *, const char *, ...);
170 int _CRTAPI1 _getpid (void);
171 #endif
172
173 #ifdef NONSYSTEM_DIR_LIBRARY
174 #include "ndir.h"
175 #endif /* NONSYSTEM_DIR_LIBRARY */
176
177 #include "syssignal.h"
178 #include "systime.h"
179 #ifdef HAVE_UTIME_H
180 #include <utime.h>
181 #endif
182
183 #ifndef HAVE_UTIMES
184 #ifndef HAVE_STRUCT_UTIMBUF
185 /* We want to use utime rather than utimes, but we couldn't find the
186 structure declaration. We'll use the traditional one. */
187 struct utimbuf {
188 long actime;
189 long modtime;
190 };
191 #endif
192 #endif
193
194 /* LPASS8 is new in 4.3, and makes cbreak mode provide all 8 bits. */
195 #ifndef LPASS8
196 #define LPASS8 0
197 #endif
198
199 #ifdef BSD4_1
200 #define LNOFLSH 0100000
201 #endif
202
203 static int baud_convert[] =
204 #ifdef BAUD_CONVERT
205 BAUD_CONVERT;
206 #else
207 {
208 0, 50, 75, 110, 135, 150, 200, 300, 600, 1200,
209 1800, 2400, 4800, 9600, 19200, 38400
210 };
211 #endif
212
213 extern short ospeed;
214
215 /* The file descriptor for Emacs's input terminal.
216 Under Unix, this is normally zero except when using X;
217 under VMS, we place the input channel number here. */
218 int input_fd;
219 \f
220 /* Specify a different file descriptor for further input operations. */
221
222 void
223 change_input_fd (fd)
224 int fd;
225 {
226 input_fd = fd;
227 }
228
229 /* Discard pending input on descriptor input_fd. */
230
231 discard_tty_input ()
232 {
233 #ifndef WINDOWSNT
234 struct emacs_tty buf;
235
236 if (noninteractive)
237 return;
238
239 /* Discarding input is not safe when the input could contain
240 replies from the X server. So don't do it. */
241 if (read_socket_hook)
242 return;
243
244 #ifdef VMS
245 end_kbd_input ();
246 SYS$QIOW (0, input_fd, IO$_READVBLK|IO$M_PURGE, input_iosb, 0, 0,
247 &buf.main, 0, 0, terminator_mask, 0, 0);
248 queue_kbd_input ();
249 #else /* not VMS */
250 #ifdef APOLLO
251 {
252 int zero = 0;
253 ioctl (input_fd, TIOCFLUSH, &zero);
254 }
255 #else /* not Apollo */
256 #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */
257 while (dos_keyread () != -1)
258 ;
259 #else /* not MSDOS */
260 EMACS_GET_TTY (input_fd, &buf);
261 EMACS_SET_TTY (input_fd, &buf, 0);
262 #endif /* not MSDOS */
263 #endif /* not Apollo */
264 #endif /* not VMS */
265 #endif /* not WINDOWSNT */
266 }
267
268 #ifdef SIGTSTP
269
270 /* Arrange for character C to be read as the next input from
271 the terminal. */
272
273 stuff_char (c)
274 char c;
275 {
276 if (read_socket_hook)
277 return;
278
279 /* Should perhaps error if in batch mode */
280 #ifdef TIOCSTI
281 ioctl (input_fd, TIOCSTI, &c);
282 #else /* no TIOCSTI */
283 error ("Cannot stuff terminal input characters in this version of Unix");
284 #endif /* no TIOCSTI */
285 }
286
287 #endif /* SIGTSTP */
288 \f
289 init_baud_rate ()
290 {
291 if (noninteractive)
292 ospeed = 0;
293 else
294 {
295 #ifdef DOS_NT
296 ospeed = 15;
297 #else /* not DOS_NT */
298 #ifdef VMS
299 struct sensemode sg;
300
301 SYS$QIOW (0, input_fd, IO$_SENSEMODE, &sg, 0, 0,
302 &sg.class, 12, 0, 0, 0, 0 );
303 ospeed = sg.xmit_baud;
304 #else /* not VMS */
305 #ifdef HAVE_TERMIOS
306 struct termios sg;
307
308 sg.c_cflag = B9600;
309 tcgetattr (input_fd, &sg);
310 ospeed = cfgetospeed (&sg);
311 #if defined (USE_GETOBAUD) && defined (getobaud)
312 /* m88k-motorola-sysv3 needs this (ghazi@noc.rutgers.edu) 9/1/94. */
313 if (ospeed == 0)
314 ospeed = getobaud (sg.c_cflag);
315 #endif
316 #else /* neither VMS nor TERMIOS */
317 #ifdef HAVE_TERMIO
318 struct termio sg;
319
320 sg.c_cflag = B9600;
321 #ifdef HAVE_TCATTR
322 tcgetattr (input_fd, &sg);
323 #else
324 ioctl (input_fd, TCGETA, &sg);
325 #endif
326 ospeed = sg.c_cflag & CBAUD;
327 #else /* neither VMS nor TERMIOS nor TERMIO */
328 struct sgttyb sg;
329
330 sg.sg_ospeed = B9600;
331 if (ioctl (input_fd, TIOCGETP, &sg) < 0)
332 abort ();
333 ospeed = sg.sg_ospeed;
334 #endif /* not HAVE_TERMIO */
335 #endif /* not HAVE_TERMIOS */
336 #endif /* not VMS */
337 #endif /* not DOS_NT */
338 }
339
340 baud_rate = (ospeed < sizeof baud_convert / sizeof baud_convert[0]
341 ? baud_convert[ospeed] : 9600);
342 if (baud_rate == 0)
343 baud_rate = 1200;
344 }
345
346 /*ARGSUSED*/
347 set_exclusive_use (fd)
348 int fd;
349 {
350 #ifdef FIOCLEX
351 ioctl (fd, FIOCLEX, 0);
352 #endif
353 /* Ok to do nothing if this feature does not exist */
354 }
355 \f
356 #ifndef subprocesses
357
358 wait_without_blocking ()
359 {
360 #ifdef BSD
361 wait3 (0, WNOHANG | WUNTRACED, 0);
362 #else
363 croak ("wait_without_blocking");
364 #endif
365 synch_process_alive = 0;
366 }
367
368 #endif /* not subprocesses */
369
370 int wait_debugging; /* Set nonzero to make following function work under dbx
371 (at least for bsd). */
372
373 SIGTYPE
374 wait_for_termination_signal ()
375 {}
376
377 /* Wait for subprocess with process id `pid' to terminate and
378 make sure it will get eliminated (not remain forever as a zombie) */
379
380 wait_for_termination (pid)
381 int pid;
382 {
383 while (1)
384 {
385 #ifdef subprocesses
386 #ifdef VMS
387 int status;
388
389 status = SYS$FORCEX (&pid, 0, 0);
390 break;
391 #else /* not VMS */
392 #if defined (BSD) || (defined (HPUX) && !defined (HPUX_5))
393 /* Note that kill returns -1 even if the process is just a zombie now.
394 But inevitably a SIGCHLD interrupt should be generated
395 and child_sig will do wait3 and make the process go away. */
396 /* There is some indication that there is a bug involved with
397 termination of subprocesses, perhaps involving a kernel bug too,
398 but no idea what it is. Just as a hunch we signal SIGCHLD to see
399 if that causes the problem to go away or get worse. */
400 sigsetmask (sigmask (SIGCHLD));
401 if (0 > kill (pid, 0))
402 {
403 sigsetmask (SIGEMPTYMASK);
404 kill (getpid (), SIGCHLD);
405 break;
406 }
407 if (wait_debugging)
408 sleep (1);
409 else
410 sigpause (SIGEMPTYMASK);
411 #else /* not BSD, and not HPUX version >= 6 */
412 #if defined (UNIPLUS)
413 if (0 > kill (pid, 0))
414 break;
415 wait (0);
416 #else /* neither BSD nor UNIPLUS: random sysV */
417 #ifdef POSIX_SIGNALS /* would this work for LINUX as well? */
418 sigblock (sigmask (SIGCHLD));
419 if (0 > kill (pid, 0))
420 {
421 sigunblock (sigmask (SIGCHLD));
422 break;
423 }
424 sigpause (SIGEMPTYMASK);
425 #else /* not POSIX_SIGNALS */
426 #ifdef HAVE_SYSV_SIGPAUSE
427 sighold (SIGCHLD);
428 if (0 > kill (pid, 0))
429 {
430 sigrelse (SIGCHLD);
431 break;
432 }
433 sigpause (SIGCHLD);
434 #else /* not HAVE_SYSV_SIGPAUSE */
435 #ifdef WINDOWSNT
436 wait (0);
437 break;
438 #else /* not WINDOWSNT */
439 if (0 > kill (pid, 0))
440 break;
441 /* Using sleep instead of pause avoids timing error.
442 If the inferior dies just before the sleep,
443 we lose just one second. */
444 sleep (1);
445 #endif /* not WINDOWSNT */
446 #endif /* not HAVE_SYSV_SIGPAUSE */
447 #endif /* not POSIX_SIGNALS */
448 #endif /* not UNIPLUS */
449 #endif /* not BSD, and not HPUX version >= 6 */
450 #endif /* not VMS */
451 #else /* not subprocesses */
452 #ifndef BSD4_1
453 if (kill (pid, 0) < 0)
454 break;
455 wait (0);
456 #else /* BSD4_1 */
457 int status;
458 status = wait (0);
459 if (status == pid || status == -1)
460 break;
461 #endif /* BSD4_1 */
462 #endif /* not subprocesses */
463 }
464 }
465
466 #ifdef subprocesses
467
468 /*
469 * flush any pending output
470 * (may flush input as well; it does not matter the way we use it)
471 */
472
473 flush_pending_output (channel)
474 int channel;
475 {
476 #ifdef HAVE_TERMIOS
477 /* If we try this, we get hit with SIGTTIN, because
478 the child's tty belongs to the child's pgrp. */
479 #else
480 #ifdef TCFLSH
481 ioctl (channel, TCFLSH, 1);
482 #else
483 #ifdef TIOCFLUSH
484 int zero = 0;
485 /* 3rd arg should be ignored
486 but some 4.2 kernels actually want the address of an int
487 and nonzero means something different. */
488 ioctl (channel, TIOCFLUSH, &zero);
489 #endif
490 #endif
491 #endif
492 }
493 \f
494 #ifndef VMS
495 /* Set up the terminal at the other end of a pseudo-terminal that
496 we will be controlling an inferior through.
497 It should not echo or do line-editing, since that is done
498 in Emacs. No padding needed for insertion into an Emacs buffer. */
499
500 child_setup_tty (out)
501 int out;
502 {
503 #ifndef DOS_NT
504 struct emacs_tty s;
505
506 EMACS_GET_TTY (out, &s);
507
508 #if defined (HAVE_TERMIO) || defined (HAVE_TERMIOS)
509 s.main.c_oflag |= OPOST; /* Enable output postprocessing */
510 s.main.c_oflag &= ~ONLCR; /* Disable map of NL to CR-NL on output */
511 #ifdef NLDLY
512 s.main.c_oflag &= ~(NLDLY|CRDLY|TABDLY|BSDLY|VTDLY|FFDLY);
513 /* No output delays */
514 #endif
515 s.main.c_lflag &= ~ECHO; /* Disable echo */
516 s.main.c_lflag |= ISIG; /* Enable signals */
517 #ifdef IUCLC
518 s.main.c_iflag &= ~IUCLC; /* Disable downcasing on input. */
519 #endif
520 #ifdef OLCUC
521 s.main.c_oflag &= ~OLCUC; /* Disable upcasing on output. */
522 #endif
523 s.main.c_cflag = (s.main.c_cflag & ~CSIZE) | CS8; /* Don't strip 8th bit */
524 #if 0
525 /* Said to be unnecessary: */
526 s.main.c_cc[VMIN] = 1; /* minimum number of characters to accept */
527 s.main.c_cc[VTIME] = 0; /* wait forever for at least 1 character */
528 #endif
529
530 s.main.c_lflag |= ICANON; /* Enable erase/kill and eof processing */
531 s.main.c_cc[VEOF] = 04; /* insure that EOF is Control-D */
532 s.main.c_cc[VERASE] = CDISABLE; /* disable erase processing */
533 s.main.c_cc[VKILL] = CDISABLE; /* disable kill processing */
534
535 #ifdef HPUX
536 s.main.c_cflag = (s.main.c_cflag & ~CBAUD) | B9600; /* baud rate sanity */
537 #endif /* HPUX */
538
539 #ifdef AIX
540 /* AIX enhanced edit loses NULs, so disable it */
541 #ifndef IBMR2AIX
542 s.main.c_line = 0;
543 s.main.c_iflag &= ~ASCEDIT;
544 #endif
545 /* Also, PTY overloads NUL and BREAK.
546 don't ignore break, but don't signal either, so it looks like NUL. */
547 s.main.c_iflag &= ~IGNBRK;
548 s.main.c_iflag &= ~BRKINT;
549 /* QUIT and INTR work better as signals, so disable character forms */
550 s.main.c_cc[VINTR] = 0377;
551 #ifdef SIGNALS_VIA_CHARACTERS
552 /* the QUIT and INTR character are used in process_send_signal
553 so set them here to something useful. */
554 if (s.main.c_cc[VQUIT] == 0377)
555 s.main.c_cc[VQUIT] = '\\'&037; /* Control-\ */
556 if (s.main.c_cc[VINTR] == 0377)
557 s.main.c_cc[VINTR] = 'C'&037; /* Control-C */
558 #else /* no TIOCGPGRP or no TIOCGLTC or no TIOCGETC */
559 /* QUIT and INTR work better as signals, so disable character forms */
560 s.main.c_cc[VQUIT] = 0377;
561 s.main.c_cc[VINTR] = 0377;
562 s.main.c_lflag &= ~ISIG;
563 #endif /* no TIOCGPGRP or no TIOCGLTC or no TIOCGETC */
564 s.main.c_cc[VEOL] = 0377;
565 s.main.c_cflag = (s.main.c_cflag & ~CBAUD) | B9600; /* baud rate sanity */
566 #endif /* AIX */
567
568 #else /* not HAVE_TERMIO */
569
570 s.main.sg_flags &= ~(ECHO | CRMOD | ANYP | ALLDELAY | RAW | LCASE
571 | CBREAK | TANDEM);
572 s.main.sg_flags |= LPASS8;
573 s.main.sg_erase = 0377;
574 s.main.sg_kill = 0377;
575 s.lmode = LLITOUT | s.lmode; /* Don't strip 8th bit */
576
577 #endif /* not HAVE_TERMIO */
578
579 EMACS_SET_TTY (out, &s, 0);
580
581 #ifdef BSD4_1
582 if (interrupt_input)
583 reset_sigio ();
584 #endif /* BSD4_1 */
585 #ifdef RTU
586 {
587 int zero = 0;
588 ioctl (out, FIOASYNC, &zero);
589 }
590 #endif /* RTU */
591 #endif /* not DOS_NT */
592 }
593 #endif /* not VMS */
594
595 #endif /* subprocesses */
596 \f
597 /* Record a signal code and the handler for it. */
598 struct save_signal
599 {
600 int code;
601 SIGTYPE (*handler) ();
602 };
603
604 /* Suspend the Emacs process; give terminal to its superior. */
605
606 sys_suspend ()
607 {
608 #ifdef VMS
609 /* "Foster" parentage allows emacs to return to a subprocess that attached
610 to the current emacs as a cheaper than starting a whole new process. This
611 is set up by KEPTEDITOR.COM. */
612 unsigned long parent_id, foster_parent_id;
613 char *fpid_string;
614
615 fpid_string = getenv ("EMACS_PARENT_PID");
616 if (fpid_string != NULL)
617 {
618 sscanf (fpid_string, "%x", &foster_parent_id);
619 if (foster_parent_id != 0)
620 parent_id = foster_parent_id;
621 else
622 parent_id = getppid ();
623 }
624 else
625 parent_id = getppid ();
626
627 xfree (fpid_string); /* On VMS, this was malloc'd */
628
629 if (parent_id && parent_id != 0xffffffff)
630 {
631 SIGTYPE (*oldsig)() = (int) signal (SIGINT, SIG_IGN);
632 int status = LIB$ATTACH (&parent_id) & 1;
633 signal (SIGINT, oldsig);
634 return status;
635 }
636 else
637 {
638 struct {
639 int l;
640 char *a;
641 } d_prompt;
642 d_prompt.l = sizeof ("Emacs: "); /* Our special prompt */
643 d_prompt.a = "Emacs: "; /* Just a reminder */
644 LIB$SPAWN (0, 0, 0, 0, 0, 0, 0, 0, 0, 0, &d_prompt, 0);
645 return 1;
646 }
647 return -1;
648 #else
649 #if defined(SIGTSTP) && !defined(MSDOS)
650
651 {
652 int pgrp = EMACS_GETPGRP (0);
653 EMACS_KILLPG (pgrp, SIGTSTP);
654 }
655
656 #else /* No SIGTSTP */
657 #ifdef USG_JOBCTRL /* If you don't know what this is don't mess with it */
658 ptrace (0, 0, 0, 0); /* set for ptrace - caught by csh */
659 kill (getpid (), SIGQUIT);
660
661 #else /* No SIGTSTP or USG_JOBCTRL */
662
663 /* On a system where suspending is not implemented,
664 instead fork a subshell and let it talk directly to the terminal
665 while we wait. */
666 sys_subshell ();
667
668 #endif /* no USG_JOBCTRL */
669 #endif /* no SIGTSTP */
670 #endif /* not VMS */
671 }
672
673 /* Fork a subshell. */
674
675 sys_subshell ()
676 {
677 #ifndef VMS
678 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */
679 int st;
680 char oldwd[MAXPATHLEN+1]; /* Fixed length is safe on MSDOS. */
681 #endif
682 int pid;
683 struct save_signal saved_handlers[5];
684 Lisp_Object dir;
685 unsigned char *str = 0;
686 int len;
687
688 saved_handlers[0].code = SIGINT;
689 saved_handlers[1].code = SIGQUIT;
690 saved_handlers[2].code = SIGTERM;
691 #ifdef SIGIO
692 saved_handlers[3].code = SIGIO;
693 saved_handlers[4].code = 0;
694 #else
695 saved_handlers[3].code = 0;
696 #endif
697
698 /* Mentioning current_buffer->buffer would mean including buffer.h,
699 which somehow wedges the hp compiler. So instead... */
700
701 dir = intern ("default-directory");
702 if (NILP (Fboundp (dir)))
703 goto xyzzy;
704 dir = Fsymbol_value (dir);
705 if (!STRINGP (dir))
706 goto xyzzy;
707
708 dir = expand_and_dir_to_file (Funhandled_file_name_directory (dir), Qnil);
709 str = (unsigned char *) alloca (XSTRING (dir)->size + 2);
710 len = XSTRING (dir)->size;
711 bcopy (XSTRING (dir)->data, str, len);
712 if (str[len - 1] != '/') str[len++] = '/';
713 str[len] = 0;
714 xyzzy:
715
716 #ifdef WINDOWSNT
717 pid = -1;
718 #else /* not WINDOWSNT */
719 pid = vfork ();
720
721 if (pid == -1)
722 error ("Can't spawn subshell");
723 if (pid == 0)
724 #endif /* not WINDOWSNT */
725 {
726 char *sh;
727
728 #ifdef MSDOS /* MW, Aug 1993 */
729 getwd (oldwd);
730 #endif
731 sh = (char *) egetenv ("SHELL");
732 if (sh == 0)
733 sh = "sh";
734
735 /* Use our buffer's default directory for the subshell. */
736 if (str)
737 chdir (str);
738
739 #ifdef subprocesses
740 close_process_descs (); /* Close Emacs's pipes/ptys */
741 #endif
742
743 #ifdef SET_EMACS_PRIORITY
744 {
745 extern int emacs_priority;
746
747 if (emacs_priority < 0)
748 nice (-emacs_priority);
749 }
750 #endif
751
752 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */
753 st = system (sh);
754 chdir (oldwd);
755 if (st)
756 report_file_error ("Can't execute subshell", Fcons (build_string (sh), Qnil));
757 #else /* not MSDOS */
758 #ifdef WINDOWSNT
759 /* Waits for process completion */
760 pid = _spawnlp (_P_WAIT, sh, sh, NULL);
761 if (pid == -1)
762 write (1, "Can't execute subshell", 22);
763
764 take_console ();
765 #else /* not WINDOWSNT */
766 execlp (sh, sh, 0);
767 write (1, "Can't execute subshell", 22);
768 _exit (1);
769 #endif /* not WINDOWSNT */
770 #endif /* not MSDOS */
771 }
772
773 save_signal_handlers (saved_handlers);
774 synch_process_alive = 1;
775 wait_for_termination (pid);
776 restore_signal_handlers (saved_handlers);
777 #endif /* !VMS */
778 }
779
780 save_signal_handlers (saved_handlers)
781 struct save_signal *saved_handlers;
782 {
783 while (saved_handlers->code)
784 {
785 saved_handlers->handler
786 = (SIGTYPE (*) ()) signal (saved_handlers->code, SIG_IGN);
787 saved_handlers++;
788 }
789 }
790
791 restore_signal_handlers (saved_handlers)
792 struct save_signal *saved_handlers;
793 {
794 while (saved_handlers->code)
795 {
796 signal (saved_handlers->code, saved_handlers->handler);
797 saved_handlers++;
798 }
799 }
800 \f
801 #ifdef F_SETFL
802
803 int old_fcntl_flags;
804
805 init_sigio (fd)
806 int fd;
807 {
808 #ifdef FASYNC
809 old_fcntl_flags = fcntl (fd, F_GETFL, 0) & ~FASYNC;
810 fcntl (fd, F_SETFL, old_fcntl_flags | FASYNC);
811 #endif
812 interrupts_deferred = 0;
813 }
814
815 reset_sigio ()
816 {
817 unrequest_sigio ();
818 }
819
820 #ifdef FASYNC /* F_SETFL does not imply existence of FASYNC */
821
822 request_sigio ()
823 {
824 if (read_socket_hook)
825 return;
826
827 #ifdef SIGWINCH
828 sigunblock (sigmask (SIGWINCH));
829 #endif
830 fcntl (input_fd, F_SETFL, old_fcntl_flags | FASYNC);
831
832 interrupts_deferred = 0;
833 }
834
835 unrequest_sigio ()
836 {
837 if (read_socket_hook)
838 return;
839
840 #ifdef SIGWINCH
841 sigblock (sigmask (SIGWINCH));
842 #endif
843 fcntl (input_fd, F_SETFL, old_fcntl_flags);
844 interrupts_deferred = 1;
845 }
846
847 #else /* no FASYNC */
848 #ifdef STRIDE /* Stride doesn't have FASYNC - use FIOASYNC */
849
850 request_sigio ()
851 {
852 int on = 1;
853
854 if (read_socket_hook)
855 return;
856
857 ioctl (input_fd, FIOASYNC, &on);
858 interrupts_deferred = 0;
859 }
860
861 unrequest_sigio ()
862 {
863 int off = 0;
864
865 if (read_socket_hook)
866 return;
867
868 ioctl (input_fd, FIOASYNC, &off);
869 interrupts_deferred = 1;
870 }
871
872 #else /* not FASYNC, not STRIDE */
873
874 #ifdef _CX_UX
875
876 #include <termios.h>
877
878 request_sigio ()
879 {
880 int on = 1;
881 sigset_t st;
882
883 if (read_socket_hook)
884 return;
885
886 sigemptyset(&st);
887 sigaddset(&st, SIGIO);
888 ioctl (input_fd, FIOASYNC, &on);
889 interrupts_deferred = 0;
890 sigprocmask(SIG_UNBLOCK, &st, (sigset_t *)0);
891 }
892
893 unrequest_sigio ()
894 {
895 int off = 0;
896
897 if (read_socket_hook)
898 return;
899
900 ioctl (input_fd, FIOASYNC, &off);
901 interrupts_deferred = 1;
902 }
903
904 #else /* ! _CX_UX */
905
906 request_sigio ()
907 {
908 if (read_socket_hook)
909 return;
910
911 croak ("request_sigio");
912 }
913
914 unrequest_sigio ()
915 {
916 if (read_socket_hook)
917 return;
918
919 croak ("unrequest_sigio");
920 }
921
922 #endif /* _CX_UX */
923 #endif /* STRIDE */
924 #endif /* FASYNC */
925 #endif /* F_SETFL */
926 \f
927 /* Saving and restoring the process group of Emacs's terminal. */
928
929 #ifdef BSD_PGRPS
930
931 /* The process group of which Emacs was a member when it initially
932 started.
933
934 If Emacs was in its own process group (i.e. inherited_pgroup ==
935 getpid ()), then we know we're running under a shell with job
936 control (Emacs would never be run as part of a pipeline).
937 Everything is fine.
938
939 If Emacs was not in its own process group, then we know we're
940 running under a shell (or a caller) that doesn't know how to
941 separate itself from Emacs (like sh). Emacs must be in its own
942 process group in order to receive SIGIO correctly. In this
943 situation, we put ourselves in our own pgroup, forcibly set the
944 tty's pgroup to our pgroup, and make sure to restore and reinstate
945 the tty's pgroup just like any other terminal setting. If
946 inherited_group was not the tty's pgroup, then we'll get a
947 SIGTTmumble when we try to change the tty's pgroup, and a CONT if
948 it goes foreground in the future, which is what should happen. */
949 int inherited_pgroup;
950
951 /* Split off the foreground process group to Emacs alone.
952 When we are in the foreground, but not started in our own process
953 group, redirect the TTY to point to our own process group. We need
954 to be in our own process group to receive SIGIO properly. */
955 narrow_foreground_group ()
956 {
957 int me = getpid ();
958
959 setpgrp (0, inherited_pgroup);
960 if (inherited_pgroup != me)
961 EMACS_SET_TTY_PGRP (input_fd, &me);
962 setpgrp (0, me);
963 }
964
965 /* Set the tty to our original foreground group. */
966 widen_foreground_group ()
967 {
968 if (inherited_pgroup != getpid ())
969 EMACS_SET_TTY_PGRP (input_fd, &inherited_pgroup);
970 setpgrp (0, inherited_pgroup);
971 }
972
973 #endif /* BSD_PGRPS */
974 \f
975 /* Getting and setting emacs_tty structures. */
976
977 /* Set *TC to the parameters associated with the terminal FD.
978 Return zero if all's well, or -1 if we ran into an error we
979 couldn't deal with. */
980 int
981 emacs_get_tty (fd, settings)
982 int fd;
983 struct emacs_tty *settings;
984 {
985 /* Retrieve the primary parameters - baud rate, character size, etcetera. */
986 #ifdef HAVE_TCATTR
987 /* We have those nifty POSIX tcmumbleattr functions. */
988 if (tcgetattr (fd, &settings->main) < 0)
989 return -1;
990
991 #else
992 #ifdef HAVE_TERMIO
993 /* The SYSV-style interface? */
994 if (ioctl (fd, TCGETA, &settings->main) < 0)
995 return -1;
996
997 #else
998 #ifdef VMS
999 /* Vehemently Monstrous System? :-) */
1000 if (! (SYS$QIOW (0, fd, IO$_SENSEMODE, settings, 0, 0,
1001 &settings->main.class, 12, 0, 0, 0, 0)
1002 & 1))
1003 return -1;
1004
1005 #else
1006 #ifndef DOS_NT
1007 /* I give up - I hope you have the BSD ioctls. */
1008 if (ioctl (fd, TIOCGETP, &settings->main) < 0)
1009 return -1;
1010 #endif /* not DOS_NT */
1011 #endif
1012 #endif
1013 #endif
1014
1015 /* Suivant - Do we have to get struct ltchars data? */
1016 #ifdef HAVE_LTCHARS
1017 if (ioctl (fd, TIOCGLTC, &settings->ltchars) < 0)
1018 return -1;
1019 #endif
1020
1021 /* How about a struct tchars and a wordful of lmode bits? */
1022 #ifdef HAVE_TCHARS
1023 if (ioctl (fd, TIOCGETC, &settings->tchars) < 0
1024 || ioctl (fd, TIOCLGET, &settings->lmode) < 0)
1025 return -1;
1026 #endif
1027
1028 /* We have survived the tempest. */
1029 return 0;
1030 }
1031
1032
1033 /* Set the parameters of the tty on FD according to the contents of
1034 *SETTINGS. If WAITP is non-zero, we wait for all queued output to
1035 be written before making the change; otherwise, we forget any
1036 queued input and make the change immediately.
1037 Return 0 if all went well, and -1 if anything failed. */
1038 int
1039 emacs_set_tty (fd, settings, waitp)
1040 int fd;
1041 struct emacs_tty *settings;
1042 int waitp;
1043 {
1044 /* Set the primary parameters - baud rate, character size, etcetera. */
1045 #ifdef HAVE_TCATTR
1046 int i;
1047 /* We have those nifty POSIX tcmumbleattr functions.
1048 William J. Smith <wjs@wiis.wang.com> writes:
1049 "POSIX 1003.1 defines tcsetattr() to return success if it was
1050 able to perform any of the requested actions, even if some
1051 of the requested actions could not be performed.
1052 We must read settings back to ensure tty setup properly.
1053 AIX requires this to keep tty from hanging occasionally." */
1054 /* This make sure that we don't loop indefinitely in here. */
1055 for (i = 0 ; i < 10 ; i++)
1056 if (tcsetattr (fd, waitp ? TCSAFLUSH : TCSADRAIN, &settings->main) < 0)
1057 {
1058 if (errno == EINTR)
1059 continue;
1060 else
1061 return -1;
1062 }
1063 else
1064 {
1065 struct termios new;
1066
1067 /* Get the current settings, and see if they're what we asked for. */
1068 tcgetattr (fd, &new);
1069 /* We cannot use memcmp on the whole structure here because under
1070 * aix386 the termios structure has some reserved field that may
1071 * not be filled in.
1072 */
1073 if ( new.c_iflag == settings->main.c_iflag
1074 && new.c_oflag == settings->main.c_oflag
1075 && new.c_cflag == settings->main.c_cflag
1076 && new.c_lflag == settings->main.c_lflag
1077 && memcmp(new.c_cc, settings->main.c_cc, NCCS) == 0)
1078 break;
1079 else
1080 continue;
1081 }
1082
1083 #else
1084 #ifdef HAVE_TERMIO
1085 /* The SYSV-style interface? */
1086 if (ioctl (fd, waitp ? TCSETAW : TCSETAF, &settings->main) < 0)
1087 return -1;
1088
1089 #else
1090 #ifdef VMS
1091 /* Vehemently Monstrous System? :-) */
1092 if (! (SYS$QIOW (0, fd, IO$_SETMODE, &input_iosb, 0, 0,
1093 &settings->main.class, 12, 0, 0, 0, 0)
1094 & 1))
1095 return -1;
1096
1097 #else
1098 #ifndef DOS_NT
1099 /* I give up - I hope you have the BSD ioctls. */
1100 if (ioctl (fd, (waitp) ? TIOCSETP : TIOCSETN, &settings->main) < 0)
1101 return -1;
1102 #endif /* not DOS_NT */
1103
1104 #endif
1105 #endif
1106 #endif
1107
1108 /* Suivant - Do we have to get struct ltchars data? */
1109 #ifdef HAVE_LTCHARS
1110 if (ioctl (fd, TIOCSLTC, &settings->ltchars) < 0)
1111 return -1;
1112 #endif
1113
1114 /* How about a struct tchars and a wordful of lmode bits? */
1115 #ifdef HAVE_TCHARS
1116 if (ioctl (fd, TIOCSETC, &settings->tchars) < 0
1117 || ioctl (fd, TIOCLSET, &settings->lmode) < 0)
1118 return -1;
1119 #endif
1120
1121 /* We have survived the tempest. */
1122 return 0;
1123 }
1124
1125 \f
1126 /* The initial tty mode bits */
1127 struct emacs_tty old_tty;
1128
1129 int term_initted; /* 1 if outer tty status has been recorded */
1130
1131 #ifdef BSD4_1
1132 /* BSD 4.1 needs to keep track of the lmode bits in order to start
1133 sigio. */
1134 int lmode;
1135 #endif
1136
1137 #ifndef F_SETOWN_BUG
1138 #ifdef F_SETOWN
1139 int old_fcntl_owner;
1140 #endif /* F_SETOWN */
1141 #endif /* F_SETOWN_BUG */
1142
1143 /* This may also be defined in stdio,
1144 but if so, this does no harm,
1145 and using the same name avoids wasting the other one's space. */
1146
1147 #if defined (USG) || defined (DGUX)
1148 unsigned char _sobuf[BUFSIZ+8];
1149 #else
1150 char _sobuf[BUFSIZ];
1151 #endif
1152
1153 #ifdef HAVE_LTCHARS
1154 static struct ltchars new_ltchars = {-1,-1,-1,-1,-1,-1};
1155 #endif
1156 #ifdef HAVE_TCHARS
1157 static struct tchars new_tchars = {-1,-1,-1,-1,-1,-1};
1158 #endif
1159
1160 init_sys_modes ()
1161 {
1162 struct emacs_tty tty;
1163
1164 #ifdef VMS
1165 #if 0
1166 static int oob_chars[2] = {0, 1 << 7}; /* catch C-g's */
1167 extern int (*interrupt_signal) ();
1168 #endif
1169 #endif
1170
1171 if (noninteractive)
1172 return;
1173
1174 #ifdef VMS
1175 if (!input_ef)
1176 input_ef = get_kbd_event_flag ();
1177 /* LIB$GET_EF (&input_ef); */
1178 SYS$CLREF (input_ef);
1179 waiting_for_ast = 0;
1180 if (!timer_ef)
1181 timer_ef = get_timer_event_flag ();
1182 /* LIB$GET_EF (&timer_ef); */
1183 SYS$CLREF (timer_ef);
1184 #if 0
1185 if (!process_ef)
1186 {
1187 LIB$GET_EF (&process_ef);
1188 SYS$CLREF (process_ef);
1189 }
1190 if (input_ef / 32 != process_ef / 32)
1191 croak ("Input and process event flags in different clusters.");
1192 #endif
1193 if (input_ef / 32 != timer_ef / 32)
1194 croak ("Input and timer event flags in different clusters.");
1195 #if 0
1196 input_eflist = ((unsigned) 1 << (input_ef % 32)) |
1197 ((unsigned) 1 << (process_ef % 32));
1198 #endif
1199 timer_eflist = ((unsigned) 1 << (input_ef % 32)) |
1200 ((unsigned) 1 << (timer_ef % 32));
1201 #ifndef VMS4_4
1202 sys_access_reinit ();
1203 #endif
1204 #endif /* not VMS */
1205
1206 #ifdef BSD_PGRPS
1207 if (! read_socket_hook && EQ (Vwindow_system, Qnil))
1208 narrow_foreground_group ();
1209 #endif
1210
1211 #ifdef HAVE_X_WINDOWS
1212 /* Emacs' window system on MSDOG uses the `internal terminal' and therefore
1213 needs the initialization code below. */
1214 if (!read_socket_hook && EQ (Vwindow_system, Qnil))
1215 #endif
1216 {
1217 EMACS_GET_TTY (input_fd, &old_tty);
1218
1219 tty = old_tty;
1220
1221 #if defined (HAVE_TERMIO) || defined (HAVE_TERMIOS)
1222 #ifdef DGUX
1223 /* This allows meta to be sent on 8th bit. */
1224 tty.main.c_iflag &= ~INPCK; /* don't check input for parity */
1225 #endif
1226 tty.main.c_iflag |= (IGNBRK); /* Ignore break condition */
1227 tty.main.c_iflag &= ~ICRNL; /* Disable map of CR to NL on input */
1228 #ifdef ISTRIP
1229 tty.main.c_iflag &= ~ISTRIP; /* don't strip 8th bit on input */
1230 #endif
1231 tty.main.c_lflag &= ~ECHO; /* Disable echo */
1232 tty.main.c_lflag &= ~ICANON; /* Disable erase/kill processing */
1233 #ifdef IEXTEN
1234 tty.main.c_lflag &= ~IEXTEN; /* Disable other editing characters. */
1235 #endif
1236 tty.main.c_lflag |= ISIG; /* Enable signals */
1237 if (flow_control)
1238 {
1239 tty.main.c_iflag |= IXON; /* Enable start/stop output control */
1240 #ifdef IXANY
1241 tty.main.c_iflag &= ~IXANY;
1242 #endif /* IXANY */
1243 }
1244 else
1245 tty.main.c_iflag &= ~IXON; /* Disable start/stop output control */
1246 tty.main.c_oflag &= ~ONLCR; /* Disable map of NL to CR-NL
1247 on output */
1248 tty.main.c_oflag &= ~TAB3; /* Disable tab expansion */
1249 #ifdef CS8
1250 if (meta_key)
1251 {
1252 tty.main.c_cflag |= CS8; /* allow 8th bit on input */
1253 tty.main.c_cflag &= ~PARENB;/* Don't check parity */
1254 }
1255 #endif
1256 tty.main.c_cc[VINTR] = quit_char; /* C-g (usually) gives SIGINT */
1257 /* Set up C-g for both SIGQUIT and SIGINT.
1258 We don't know which we will get, but we handle both alike
1259 so which one it really gives us does not matter. */
1260 tty.main.c_cc[VQUIT] = quit_char;
1261 tty.main.c_cc[VMIN] = 1; /* Input should wait for at least 1 char */
1262 tty.main.c_cc[VTIME] = 0; /* no matter how long that takes. */
1263 #ifdef VSWTCH
1264 tty.main.c_cc[VSWTCH] = CDISABLE; /* Turn off shell layering use
1265 of C-z */
1266 #endif /* VSWTCH */
1267 #if defined (mips) || defined (HAVE_TCATTR)
1268 #ifdef VSUSP
1269 tty.main.c_cc[VSUSP] = CDISABLE; /* Turn off mips handling of C-z. */
1270 #endif /* VSUSP */
1271 #ifdef V_DSUSP
1272 tty.main.c_cc[V_DSUSP] = CDISABLE; /* Turn off mips handling of C-y. */
1273 #endif /* V_DSUSP */
1274 #ifdef VDSUSP /* Some systems have VDSUSP, some have V_DSUSP. */
1275 tty.main.c_cc[VDSUSP] = CDISABLE;
1276 #endif /* VDSUSP */
1277 #ifdef VLNEXT
1278 tty.main.c_cc[VLNEXT] = CDISABLE;
1279 #endif /* VLNEXT */
1280 #ifdef VREPRINT
1281 tty.main.c_cc[VREPRINT] = CDISABLE;
1282 #endif /* VREPRINT */
1283 #ifdef VWERASE
1284 tty.main.c_cc[VWERASE] = CDISABLE;
1285 #endif /* VWERASE */
1286 #ifdef VDISCARD
1287 tty.main.c_cc[VDISCARD] = CDISABLE;
1288 #endif /* VDISCARD */
1289 #ifdef VSTART
1290 tty.main.c_cc[VSTART] = CDISABLE;
1291 #endif /* VSTART */
1292 #ifdef VSTOP
1293 tty.main.c_cc[VSTOP] = CDISABLE;
1294 #endif /* VSTOP */
1295 #endif /* mips or HAVE_TCATTR */
1296 #ifdef SET_LINE_DISCIPLINE
1297 /* Need to explicitely request TERMIODISC line discipline or
1298 Ultrix's termios does not work correctly. */
1299 tty.main.c_line = SET_LINE_DISCIPLINE;
1300 #endif
1301 #ifdef AIX
1302 #ifndef IBMR2AIX
1303 /* AIX enhanced edit loses NULs, so disable it. */
1304 tty.main.c_line = 0;
1305 tty.main.c_iflag &= ~ASCEDIT;
1306 #else
1307 tty.main.c_cc[VSTRT] = 255;
1308 tty.main.c_cc[VSTOP] = 255;
1309 tty.main.c_cc[VSUSP] = 255;
1310 tty.main.c_cc[VDSUSP] = 255;
1311 #endif /* IBMR2AIX */
1312 /* Also, PTY overloads NUL and BREAK.
1313 don't ignore break, but don't signal either, so it looks like NUL.
1314 This really serves a purpose only if running in an XTERM window
1315 or via TELNET or the like, but does no harm elsewhere. */
1316 tty.main.c_iflag &= ~IGNBRK;
1317 tty.main.c_iflag &= ~BRKINT;
1318 #endif
1319 #else /* if not HAVE_TERMIO */
1320 #ifdef VMS
1321 tty.main.tt_char |= TT$M_NOECHO;
1322 if (meta_key)
1323 tty.main.tt_char |= TT$M_EIGHTBIT;
1324 if (flow_control)
1325 tty.main.tt_char |= TT$M_TTSYNC;
1326 else
1327 tty.main.tt_char &= ~TT$M_TTSYNC;
1328 tty.main.tt2_char |= TT2$M_PASTHRU | TT2$M_XON;
1329 #else /* not VMS (BSD, that is) */
1330 #ifndef DOS_NT
1331 tty.main.sg_flags &= ~(ECHO | CRMOD | XTABS);
1332 if (meta_key)
1333 tty.main.sg_flags |= ANYP;
1334 tty.main.sg_flags |= interrupt_input ? RAW : CBREAK;
1335 #endif /* not DOS_NT */
1336 #endif /* not VMS (BSD, that is) */
1337 #endif /* not HAVE_TERMIO */
1338
1339 /* If going to use CBREAK mode, we must request C-g to interrupt
1340 and turn off start and stop chars, etc. If not going to use
1341 CBREAK mode, do this anyway so as to turn off local flow
1342 control for user coming over network on 4.2; in this case,
1343 only t_stopc and t_startc really matter. */
1344 #ifndef HAVE_TERMIO
1345 #ifdef HAVE_TCHARS
1346 /* Note: if not using CBREAK mode, it makes no difference how we
1347 set this */
1348 tty.tchars = new_tchars;
1349 tty.tchars.t_intrc = quit_char;
1350 if (flow_control)
1351 {
1352 tty.tchars.t_startc = '\021';
1353 tty.tchars.t_stopc = '\023';
1354 }
1355
1356 tty.lmode = LDECCTQ | LLITOUT | LPASS8 | LNOFLSH | old_tty.lmode;
1357 #ifdef ultrix
1358 /* Under Ultrix 4.2a, leaving this out doesn't seem to hurt
1359 anything, and leaving it in breaks the meta key. Go figure. */
1360 tty.lmode &= ~LLITOUT;
1361 #endif
1362
1363 #ifdef BSD4_1
1364 lmode = tty.lmode;
1365 #endif
1366
1367 #endif /* HAVE_TCHARS */
1368 #endif /* not HAVE_TERMIO */
1369
1370 #ifdef HAVE_LTCHARS
1371 tty.ltchars = new_ltchars;
1372 #endif /* HAVE_LTCHARS */
1373 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida, MW Aug 1993 */
1374 if (!term_initted)
1375 internal_terminal_init ();
1376 dos_ttraw ();
1377 #endif
1378
1379 EMACS_SET_TTY (input_fd, &tty, 0);
1380
1381 /* This code added to insure that, if flow-control is not to be used,
1382 we have an unlocked terminal at the start. */
1383
1384 #ifdef TCXONC
1385 if (!flow_control) ioctl (input_fd, TCXONC, 1);
1386 #endif
1387 #ifndef APOLLO
1388 #ifdef TIOCSTART
1389 if (!flow_control) ioctl (input_fd, TIOCSTART, 0);
1390 #endif
1391 #endif
1392
1393 #if defined (HAVE_TERMIOS) || defined (HPUX9)
1394 #ifdef TCOON
1395 if (!flow_control) tcflow (input_fd, TCOON);
1396 #endif
1397 #endif
1398
1399 #ifdef AIXHFT
1400 hft_init ();
1401 #ifdef IBMR2AIX
1402 {
1403 /* IBM's HFT device usually thinks a ^J should be LF/CR. We need it
1404 to be only LF. This is the way that is done. */
1405 struct termio tty;
1406
1407 if (ioctl (1, HFTGETID, &tty) != -1)
1408 write (1, "\033[20l", 5);
1409 }
1410 #endif
1411 #endif /* AIXHFT */
1412
1413 #ifdef VMS
1414 /* Appears to do nothing when in PASTHRU mode.
1415 SYS$QIOW (0, input_fd, IO$_SETMODE|IO$M_OUTBAND, 0, 0, 0,
1416 interrupt_signal, oob_chars, 0, 0, 0, 0);
1417 */
1418 queue_kbd_input (0);
1419 #endif /* VMS */
1420 }
1421
1422 #ifdef F_SETFL
1423 #ifndef F_SETOWN_BUG
1424 #ifdef F_GETOWN /* F_SETFL does not imply existence of F_GETOWN */
1425 if (interrupt_input
1426 && ! read_socket_hook && EQ (Vwindow_system, Qnil))
1427 {
1428 old_fcntl_owner = fcntl (input_fd, F_GETOWN, 0);
1429 fcntl (input_fd, F_SETOWN, getpid ());
1430 init_sigio (input_fd);
1431 }
1432 #endif /* F_GETOWN */
1433 #endif /* F_SETOWN_BUG */
1434 #endif /* F_SETFL */
1435
1436 #ifdef BSD4_1
1437 if (interrupt_input)
1438 init_sigio (input_fd);
1439 #endif
1440
1441 #ifdef VMS /* VMS sometimes has this symbol but lacks setvbuf. */
1442 #undef _IOFBF
1443 #endif
1444 #ifdef _IOFBF
1445 /* This symbol is defined on recent USG systems.
1446 Someone says without this call USG won't really buffer the file
1447 even with a call to setbuf. */
1448 setvbuf (stdout, _sobuf, _IOFBF, sizeof _sobuf);
1449 #else
1450 setbuf (stdout, _sobuf);
1451 #endif
1452 if (! read_socket_hook && EQ (Vwindow_system, Qnil))
1453 set_terminal_modes ();
1454
1455 if (term_initted && no_redraw_on_reenter)
1456 {
1457 if (display_completed)
1458 direct_output_forward_char (0);
1459 }
1460 else
1461 {
1462 frame_garbaged = 1;
1463 #ifdef MULTI_FRAME
1464 if (FRAMEP (Vterminal_frame))
1465 FRAME_GARBAGED_P (XFRAME (Vterminal_frame)) = 1;
1466 #endif
1467 }
1468
1469 term_initted = 1;
1470 }
1471
1472 /* Return nonzero if safe to use tabs in output.
1473 At the time this is called, init_sys_modes has not been done yet. */
1474
1475 tabs_safe_p ()
1476 {
1477 struct emacs_tty tty;
1478
1479 EMACS_GET_TTY (input_fd, &tty);
1480 return EMACS_TTY_TABS_OK (&tty);
1481 }
1482 \f
1483 /* Get terminal size from system.
1484 Store number of lines into *HEIGHTP and width into *WIDTHP.
1485 We store 0 if there's no valid information. */
1486
1487 get_frame_size (widthp, heightp)
1488 int *widthp, *heightp;
1489 {
1490
1491 #ifdef TIOCGWINSZ
1492
1493 /* BSD-style. */
1494 struct winsize size;
1495
1496 if (ioctl (input_fd, TIOCGWINSZ, &size) == -1)
1497 *widthp = *heightp = 0;
1498 else
1499 {
1500 *widthp = size.ws_col;
1501 *heightp = size.ws_row;
1502 }
1503
1504 #else
1505 #ifdef TIOCGSIZE
1506
1507 /* SunOS - style. */
1508 struct ttysize size;
1509
1510 if (ioctl (input_fd, TIOCGSIZE, &size) == -1)
1511 *widthp = *heightp = 0;
1512 else
1513 {
1514 *widthp = size.ts_cols;
1515 *heightp = size.ts_lines;
1516 }
1517
1518 #else
1519 #ifdef VMS
1520
1521 struct sensemode tty;
1522
1523 SYS$QIOW (0, input_fd, IO$_SENSEMODE, &tty, 0, 0,
1524 &tty.class, 12, 0, 0, 0, 0);
1525 *widthp = tty.scr_wid;
1526 *heightp = tty.scr_len;
1527
1528 #else
1529 #ifdef MSDOS
1530 *widthp = ScreenCols ();
1531 *heightp = ScreenRows ();
1532 #else /* system doesn't know size */
1533 *widthp = 0;
1534 *heightp = 0;
1535 #endif
1536
1537 #endif /* not VMS */
1538 #endif /* not SunOS-style */
1539 #endif /* not BSD-style */
1540 }
1541
1542 /* Set the logical window size associated with descriptor FD
1543 to HEIGHT and WIDTH. This is used mainly with ptys. */
1544
1545 int
1546 set_window_size (fd, height, width)
1547 int fd, height, width;
1548 {
1549 #ifdef TIOCSWINSZ
1550
1551 /* BSD-style. */
1552 struct winsize size;
1553 size.ws_row = height;
1554 size.ws_col = width;
1555
1556 if (ioctl (fd, TIOCSWINSZ, &size) == -1)
1557 return 0; /* error */
1558 else
1559 return 1;
1560
1561 #else
1562 #ifdef TIOCSSIZE
1563
1564 /* SunOS - style. */
1565 struct ttysize size;
1566 size.ts_lines = height;
1567 size.ts_cols = width;
1568
1569 if (ioctl (fd, TIOCGSIZE, &size) == -1)
1570 return 0;
1571 else
1572 return 1;
1573 #else
1574 return -1;
1575 #endif /* not SunOS-style */
1576 #endif /* not BSD-style */
1577 }
1578
1579 \f
1580 /* Prepare the terminal for exiting Emacs; move the cursor to the
1581 bottom of the frame, turn off interrupt-driven I/O, etc. */
1582 reset_sys_modes ()
1583 {
1584 if (noninteractive)
1585 {
1586 fflush (stdout);
1587 return;
1588 }
1589 if (!term_initted)
1590 return;
1591 #ifdef HAVE_X_WINDOWS
1592 /* Emacs' window system on MSDOG uses the `internal terminal' and therefore
1593 needs the clean-up code below. */
1594 if (read_socket_hook || !EQ (Vwindow_system, Qnil))
1595 return;
1596 #endif
1597 cursor_to (FRAME_HEIGHT (selected_frame) - 1, 0);
1598 #ifdef MSDOS
1599 if (!EQ (Vwindow_system, Qnil))
1600 {
1601 /* Change to grey on white. */
1602 putchar ('\e');
1603 putchar ('A');
1604 putchar (7);
1605 }
1606 #endif
1607 clear_end_of_line (FRAME_WIDTH (selected_frame));
1608 /* clear_end_of_line may move the cursor */
1609 cursor_to (FRAME_HEIGHT (selected_frame) - 1, 0);
1610 #if defined (IBMR2AIX) && defined (AIXHFT)
1611 {
1612 /* HFT devices normally use ^J as a LF/CR. We forced it to
1613 do the LF only. Now, we need to reset it. */
1614 struct termio tty;
1615
1616 if (ioctl (1, HFTGETID, &tty) != -1)
1617 write (1, "\033[20h", 5);
1618 }
1619 #endif
1620
1621 reset_terminal_modes ();
1622 fflush (stdout);
1623 #ifdef BSD
1624 #ifndef BSD4_1
1625 /* Avoid possible loss of output when changing terminal modes. */
1626 fsync (fileno (stdout));
1627 #endif
1628 #endif
1629
1630 #ifdef F_SETFL
1631 #ifndef F_SETOWN_BUG
1632 #ifdef F_SETOWN /* F_SETFL does not imply existence of F_SETOWN */
1633 if (interrupt_input)
1634 {
1635 reset_sigio ();
1636 fcntl (input_fd, F_SETOWN, old_fcntl_owner);
1637 }
1638 #endif /* F_SETOWN */
1639 #endif /* F_SETOWN_BUG */
1640 #ifdef O_NDELAY
1641 fcntl (input_fd, F_SETFL, fcntl (input_fd, F_GETFL, 0) & ~O_NDELAY);
1642 #endif
1643 #endif /* F_SETFL */
1644 #ifdef BSD4_1
1645 if (interrupt_input)
1646 reset_sigio ();
1647 #endif /* BSD4_1 */
1648
1649 while (EMACS_SET_TTY (input_fd, &old_tty, 0) < 0 && errno == EINTR)
1650 ;
1651
1652 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */
1653 dos_ttcooked ();
1654 #endif
1655
1656 #ifdef SET_LINE_DISCIPLINE
1657 /* Ultrix's termios *ignores* any line discipline except TERMIODISC.
1658 A different old line discipline is therefore not restored, yet.
1659 Restore the old line discipline by hand. */
1660 ioctl (0, TIOCSETD, &old_tty.main.c_line);
1661 #endif
1662
1663 #ifdef AIXHFT
1664 hft_reset ();
1665 #endif
1666
1667 #ifdef BSD_PGRPS
1668 widen_foreground_group ();
1669 #endif
1670 }
1671 \f
1672 #ifdef HAVE_PTYS
1673
1674 /* Set up the proper status flags for use of a pty. */
1675
1676 setup_pty (fd)
1677 int fd;
1678 {
1679 /* I'm told that TOICREMOTE does not mean control chars
1680 "can't be sent" but rather that they don't have
1681 input-editing or signaling effects.
1682 That should be good, because we have other ways
1683 to do those things in Emacs.
1684 However, telnet mode seems not to work on 4.2.
1685 So TIOCREMOTE is turned off now. */
1686
1687 /* Under hp-ux, if TIOCREMOTE is turned on, some calls
1688 will hang. In particular, the "timeout" feature (which
1689 causes a read to return if there is no data available)
1690 does this. Also it is known that telnet mode will hang
1691 in such a way that Emacs must be stopped (perhaps this
1692 is the same problem).
1693
1694 If TIOCREMOTE is turned off, then there is a bug in
1695 hp-ux which sometimes loses data. Apparently the
1696 code which blocks the master process when the internal
1697 buffer fills up does not work. Other than this,
1698 though, everything else seems to work fine.
1699
1700 Since the latter lossage is more benign, we may as well
1701 lose that way. -- cph */
1702 #ifdef FIONBIO
1703 #ifdef SYSV_PTYS
1704 {
1705 int on = 1;
1706 ioctl (fd, FIONBIO, &on);
1707 }
1708 #endif
1709 #endif
1710 #ifdef IBMRTAIX
1711 /* On AIX, the parent gets SIGHUP when a pty attached child dies. So, we */
1712 /* ignore SIGHUP once we've started a child on a pty. Note that this may */
1713 /* cause EMACS not to die when it should, i.e., when its own controlling */
1714 /* tty goes away. I've complained to the AIX developers, and they may */
1715 /* change this behavior, but I'm not going to hold my breath. */
1716 signal (SIGHUP, SIG_IGN);
1717 #endif
1718 }
1719 #endif /* HAVE_PTYS */
1720 \f
1721 #ifdef VMS
1722
1723 /* Assigning an input channel is done at the start of Emacs execution.
1724 This is called each time Emacs is resumed, also, but does nothing
1725 because input_chain is no longer zero. */
1726
1727 init_vms_input ()
1728 {
1729 int status;
1730
1731 if (input_fd == 0)
1732 {
1733 status = SYS$ASSIGN (&input_dsc, &input_fd, 0, 0);
1734 if (! (status & 1))
1735 LIB$STOP (status);
1736 }
1737 }
1738
1739 /* Deassigning the input channel is done before exiting. */
1740
1741 stop_vms_input ()
1742 {
1743 return SYS$DASSGN (input_fd);
1744 }
1745
1746 short input_buffer;
1747
1748 /* Request reading one character into the keyboard buffer.
1749 This is done as soon as the buffer becomes empty. */
1750
1751 queue_kbd_input ()
1752 {
1753 int status;
1754 extern kbd_input_ast ();
1755
1756 waiting_for_ast = 0;
1757 stop_input = 0;
1758 status = SYS$QIO (0, input_fd, IO$_READVBLK,
1759 &input_iosb, kbd_input_ast, 1,
1760 &input_buffer, 1, 0, terminator_mask, 0, 0);
1761 }
1762
1763 int input_count;
1764
1765 /* Ast routine that is called when keyboard input comes in
1766 in accord with the SYS$QIO above. */
1767
1768 kbd_input_ast ()
1769 {
1770 register int c = -1;
1771 int old_errno = errno;
1772 extern EMACS_TIME *input_available_clear_time;
1773
1774 if (waiting_for_ast)
1775 SYS$SETEF (input_ef);
1776 waiting_for_ast = 0;
1777 input_count++;
1778 #ifdef ASTDEBUG
1779 if (input_count == 25)
1780 exit (1);
1781 printf ("Ast # %d,", input_count);
1782 printf (" iosb = %x, %x, %x, %x",
1783 input_iosb.offset, input_iosb.status, input_iosb.termlen,
1784 input_iosb.term);
1785 #endif
1786 if (input_iosb.offset)
1787 {
1788 c = input_buffer;
1789 #ifdef ASTDEBUG
1790 printf (", char = 0%o", c);
1791 #endif
1792 }
1793 #ifdef ASTDEBUG
1794 printf ("\n");
1795 fflush (stdout);
1796 sleep (1);
1797 #endif
1798 if (! stop_input)
1799 queue_kbd_input ();
1800 if (c >= 0)
1801 {
1802 struct input_event e;
1803 e.kind = ascii_keystroke;
1804 XSETINT (e.code, c);
1805 XSETFRAME (e.frame_or_window, selected_frame);
1806 kbd_buffer_store_event (&e);
1807 }
1808 if (input_available_clear_time)
1809 EMACS_SET_SECS_USECS (*input_available_clear_time, 0, 0);
1810 errno = old_errno;
1811 }
1812
1813 /* Wait until there is something in kbd_buffer. */
1814
1815 wait_for_kbd_input ()
1816 {
1817 extern int have_process_input, process_exited;
1818
1819 /* If already something, avoid doing system calls. */
1820 if (detect_input_pending ())
1821 {
1822 return;
1823 }
1824 /* Clear a flag, and tell ast routine above to set it. */
1825 SYS$CLREF (input_ef);
1826 waiting_for_ast = 1;
1827 /* Check for timing error: ast happened while we were doing that. */
1828 if (!detect_input_pending ())
1829 {
1830 /* No timing error: wait for flag to be set. */
1831 set_waiting_for_input (0);
1832 SYS$WFLOR (input_ef, input_eflist);
1833 clear_waiting_for_input (0);
1834 if (!detect_input_pending ())
1835 /* Check for subprocess input availability */
1836 {
1837 int dsp = have_process_input || process_exited;
1838
1839 SYS$CLREF (process_ef);
1840 if (have_process_input)
1841 process_command_input ();
1842 if (process_exited)
1843 process_exit ();
1844 if (dsp)
1845 {
1846 update_mode_lines++;
1847 prepare_menu_bars ();
1848 redisplay_preserve_echo_area ();
1849 }
1850 }
1851 }
1852 waiting_for_ast = 0;
1853 }
1854
1855 /* Get rid of any pending QIO, when we are about to suspend
1856 or when we want to throw away pending input.
1857 We wait for a positive sign that the AST routine has run
1858 and therefore there is no I/O request queued when we return.
1859 SYS$SETAST is used to avoid a timing error. */
1860
1861 end_kbd_input ()
1862 {
1863 #ifdef ASTDEBUG
1864 printf ("At end_kbd_input.\n");
1865 fflush (stdout);
1866 sleep (1);
1867 #endif
1868 if (LIB$AST_IN_PROG ()) /* Don't wait if suspending from kbd_buffer_store_event! */
1869 {
1870 SYS$CANCEL (input_fd);
1871 return;
1872 }
1873
1874 SYS$SETAST (0);
1875 /* Clear a flag, and tell ast routine above to set it. */
1876 SYS$CLREF (input_ef);
1877 waiting_for_ast = 1;
1878 stop_input = 1;
1879 SYS$CANCEL (input_fd);
1880 SYS$SETAST (1);
1881 SYS$WAITFR (input_ef);
1882 waiting_for_ast = 0;
1883 }
1884
1885 /* Wait for either input available or time interval expiry. */
1886
1887 input_wait_timeout (timeval)
1888 int timeval; /* Time to wait, in seconds */
1889 {
1890 int time [2];
1891 static int zero = 0;
1892 static int large = -10000000;
1893
1894 LIB$EMUL (&timeval, &large, &zero, time); /* Convert to VMS format */
1895
1896 /* If already something, avoid doing system calls. */
1897 if (detect_input_pending ())
1898 {
1899 return;
1900 }
1901 /* Clear a flag, and tell ast routine above to set it. */
1902 SYS$CLREF (input_ef);
1903 waiting_for_ast = 1;
1904 /* Check for timing error: ast happened while we were doing that. */
1905 if (!detect_input_pending ())
1906 {
1907 /* No timing error: wait for flag to be set. */
1908 SYS$CANTIM (1, 0);
1909 if (SYS$SETIMR (timer_ef, time, 0, 1) & 1) /* Set timer */
1910 SYS$WFLOR (timer_ef, timer_eflist); /* Wait for timer expiry or input */
1911 }
1912 waiting_for_ast = 0;
1913 }
1914
1915 /* The standard `sleep' routine works some other way
1916 and it stops working if you have ever quit out of it.
1917 This one continues to work. */
1918
1919 sys_sleep (timeval)
1920 int timeval;
1921 {
1922 int time [2];
1923 static int zero = 0;
1924 static int large = -10000000;
1925
1926 LIB$EMUL (&timeval, &large, &zero, time); /* Convert to VMS format */
1927
1928 SYS$CANTIM (1, 0);
1929 if (SYS$SETIMR (timer_ef, time, 0, 1) & 1) /* Set timer */
1930 SYS$WAITFR (timer_ef); /* Wait for timer expiry only */
1931 }
1932
1933 init_sigio (fd)
1934 int fd;
1935 {
1936 request_sigio ();
1937 }
1938
1939 reset_sigio ()
1940 {
1941 unrequest_sigio ();
1942 }
1943
1944 request_sigio ()
1945 {
1946 croak ("request sigio");
1947 }
1948
1949 unrequest_sigio ()
1950 {
1951 croak ("unrequest sigio");
1952 }
1953
1954 #endif /* VMS */
1955 \f
1956 /* Note that VMS compiler won't accept defined (CANNOT_DUMP). */
1957 #ifndef CANNOT_DUMP
1958 #define NEED_STARTS
1959 #endif
1960
1961 #ifndef SYSTEM_MALLOC
1962 #ifndef NEED_STARTS
1963 #define NEED_STARTS
1964 #endif
1965 #endif
1966
1967 #ifdef NEED_STARTS
1968 /* Some systems that cannot dump also cannot implement these. */
1969
1970 /*
1971 * Return the address of the start of the text segment prior to
1972 * doing an unexec. After unexec the return value is undefined.
1973 * See crt0.c for further explanation and _start.
1974 *
1975 */
1976
1977 #ifndef HAVE_TEXT_START
1978 char *
1979 start_of_text ()
1980 {
1981 #ifdef TEXT_START
1982 return ((char *) TEXT_START);
1983 #else
1984 #ifdef GOULD
1985 extern csrt ();
1986 return ((char *) csrt);
1987 #else /* not GOULD */
1988 extern int _start ();
1989 return ((char *) _start);
1990 #endif /* GOULD */
1991 #endif /* TEXT_START */
1992 }
1993 #endif /* not HAVE_TEXT_START */
1994
1995 /*
1996 * Return the address of the start of the data segment prior to
1997 * doing an unexec. After unexec the return value is undefined.
1998 * See crt0.c for further information and definition of data_start.
1999 *
2000 * Apparently, on BSD systems this is etext at startup. On
2001 * USG systems (swapping) this is highly mmu dependent and
2002 * is also dependent on whether or not the program is running
2003 * with shared text. Generally there is a (possibly large)
2004 * gap between end of text and start of data with shared text.
2005 *
2006 * On Uniplus+ systems with shared text, data starts at a
2007 * fixed address. Each port (from a given oem) is generally
2008 * different, and the specific value of the start of data can
2009 * be obtained via the UniPlus+ specific "uvar" system call,
2010 * however the method outlined in crt0.c seems to be more portable.
2011 *
2012 * Probably what will have to happen when a USG unexec is available,
2013 * at least on UniPlus, is temacs will have to be made unshared so
2014 * that text and data are contiguous. Then once loadup is complete,
2015 * unexec will produce a shared executable where the data can be
2016 * at the normal shared text boundry and the startofdata variable
2017 * will be patched by unexec to the correct value.
2018 *
2019 */
2020
2021 char *
2022 start_of_data ()
2023 {
2024 #ifdef DATA_START
2025 return ((char *) DATA_START);
2026 #else
2027 #ifdef ORDINARY_LINK
2028 /*
2029 * This is a hack. Since we're not linking crt0.c or pre_crt0.c,
2030 * data_start isn't defined. We take the address of environ, which
2031 * is known to live at or near the start of the system crt0.c, and
2032 * we don't sweat the handful of bytes that might lose.
2033 */
2034 extern char **environ;
2035
2036 return((char *) &environ);
2037 #else
2038 extern int data_start;
2039 return ((char *) &data_start);
2040 #endif /* ORDINARY_LINK */
2041 #endif /* DATA_START */
2042 }
2043 #endif /* NEED_STARTS (not CANNOT_DUMP or not SYSTEM_MALLOC) */
2044
2045 #ifndef CANNOT_DUMP
2046 /* Some systems that cannot dump also cannot implement these. */
2047
2048 /*
2049 * Return the address of the end of the text segment prior to
2050 * doing an unexec. After unexec the return value is undefined.
2051 */
2052
2053 char *
2054 end_of_text ()
2055 {
2056 #ifdef TEXT_END
2057 return ((char *) TEXT_END);
2058 #else
2059 extern int etext;
2060 return ((char *) &etext);
2061 #endif
2062 }
2063
2064 /*
2065 * Return the address of the end of the data segment prior to
2066 * doing an unexec. After unexec the return value is undefined.
2067 */
2068
2069 char *
2070 end_of_data ()
2071 {
2072 #ifdef DATA_END
2073 return ((char *) DATA_END);
2074 #else
2075 extern int edata;
2076 return ((char *) &edata);
2077 #endif
2078 }
2079
2080 #endif /* not CANNOT_DUMP */
2081 \f
2082 /* init_system_name sets up the string for the Lisp function
2083 system-name to return. */
2084
2085 #ifdef BSD4_1
2086 #include <whoami.h>
2087 #endif
2088
2089 extern Lisp_Object Vsystem_name;
2090
2091 #ifndef BSD4_1
2092 #ifndef VMS
2093 #ifdef HAVE_SOCKETS
2094 #include <sys/socket.h>
2095 #include <netdb.h>
2096 #endif /* HAVE_SOCKETS */
2097 #endif /* not VMS */
2098 #endif /* not BSD4_1 */
2099
2100 void
2101 init_system_name ()
2102 {
2103 #ifdef BSD4_1
2104 Vsystem_name = build_string (sysname);
2105 #else
2106 #ifdef VMS
2107 char *sp, *end;
2108 if ((sp = egetenv ("SYS$NODE")) == 0)
2109 Vsystem_name = build_string ("vax-vms");
2110 else if ((end = index (sp, ':')) == 0)
2111 Vsystem_name = build_string (sp);
2112 else
2113 Vsystem_name = make_string (sp, end - sp);
2114 #else
2115 #ifndef HAVE_GETHOSTNAME
2116 struct utsname uts;
2117 uname (&uts);
2118 Vsystem_name = build_string (uts.nodename);
2119 #else /* HAVE_GETHOSTNAME */
2120 int hostname_size = 256;
2121 char *hostname = (char *) alloca (hostname_size);
2122
2123 /* Try to get the host name; if the buffer is too short, try
2124 again. Apparently, the only indication gethostname gives of
2125 whether the buffer was large enough is the presence or absence
2126 of a '\0' in the string. Eech. */
2127 for (;;)
2128 {
2129 gethostname (hostname, hostname_size - 1);
2130 hostname[hostname_size - 1] = '\0';
2131
2132 /* Was the buffer large enough for the '\0'? */
2133 if (strlen (hostname) < hostname_size - 1)
2134 break;
2135
2136 hostname_size <<= 1;
2137 hostname = (char *) alloca (hostname_size);
2138 }
2139 #ifdef HAVE_SOCKETS
2140 /* Turn the hostname into the official, fully-qualified hostname.
2141 Don't do this if we're going to dump; this can confuse system
2142 libraries on some machines and make the dumped emacs core dump. */
2143 #ifndef CANNOT_DUMP
2144 if (initialized)
2145 #endif /* not CANNOT_DUMP */
2146 {
2147 struct hostent *hp;
2148 int count;
2149 for (count = 0; count < 10; count++)
2150 {
2151 #ifdef TRY_AGAIN
2152 h_errno = 0;
2153 #endif
2154 hp = gethostbyname (hostname);
2155 #ifdef TRY_AGAIN
2156 if (! (hp == 0 && h_errno == TRY_AGAIN))
2157 #endif
2158 break;
2159 Fsleep_for (make_number (1), Qnil);
2160 }
2161 if (hp)
2162 {
2163 char *fqdn = hp->h_name;
2164 char *p;
2165
2166 if (!index (fqdn, '.'))
2167 {
2168 /* We still don't have a fully qualified domain name.
2169 Try to find one in the list of alternate names */
2170 char **alias = hp->h_aliases;
2171 while (*alias && !index (*alias, '.'))
2172 alias++;
2173 if (*alias)
2174 fqdn = *alias;
2175 }
2176 hostname = fqdn;
2177 #if 0
2178 /* Convert the host name to lower case. */
2179 /* Using ctype.h here would introduce a possible locale
2180 dependence that is probably wrong for hostnames. */
2181 p = hostname;
2182 while (*p)
2183 {
2184 if (*p >= 'A' && *p <= 'Z')
2185 *p += 'a' - 'A';
2186 p++;
2187 }
2188 #endif
2189 }
2190 }
2191 #endif /* HAVE_SOCKETS */
2192 Vsystem_name = build_string (hostname);
2193 #endif /* HAVE_GETHOSTNAME */
2194 #endif /* VMS */
2195 #endif /* BSD4_1 */
2196 {
2197 unsigned char *p;
2198 for (p = XSTRING (Vsystem_name)->data; *p; p++)
2199 if (*p == ' ' || *p == '\t')
2200 *p = '-';
2201 }
2202 }
2203 \f
2204 #ifndef VMS
2205 #if !defined (HAVE_SELECT) || defined (BROKEN_SELECT_NON_X)
2206
2207 #include "sysselect.h"
2208 #undef select
2209
2210 #if defined (HAVE_X_WINDOWS) && !defined (HAVE_SELECT)
2211 /* Cause explanatory error message at compile time,
2212 since the select emulation is not good enough for X. */
2213 int *x = &x_windows_lose_if_no_select_system_call;
2214 #endif
2215
2216 /* Emulate as much as select as is possible under 4.1 and needed by Gnu Emacs
2217 * Only checks read descriptors.
2218 */
2219 /* How long to wait between checking fds in select */
2220 #define SELECT_PAUSE 1
2221 int select_alarmed;
2222
2223 /* For longjmp'ing back to read_input_waiting. */
2224
2225 jmp_buf read_alarm_throw;
2226
2227 /* Nonzero if the alarm signal should throw back to read_input_waiting.
2228 The read_socket_hook function sets this to 1 while it is waiting. */
2229
2230 int read_alarm_should_throw;
2231
2232 SIGTYPE
2233 select_alarm ()
2234 {
2235 select_alarmed = 1;
2236 #ifdef BSD4_1
2237 sigrelse (SIGALRM);
2238 #else /* not BSD4_1 */
2239 signal (SIGALRM, SIG_IGN);
2240 #endif /* not BSD4_1 */
2241 if (read_alarm_should_throw)
2242 longjmp (read_alarm_throw, 1);
2243 }
2244
2245 #ifndef WINDOWSNT
2246 /* Only rfds are checked. */
2247 int
2248 sys_select (nfds, rfds, wfds, efds, timeout)
2249 int nfds;
2250 SELECT_TYPE *rfds, *wfds, *efds;
2251 EMACS_TIME *timeout;
2252 {
2253 int ravail = 0, old_alarm;
2254 SELECT_TYPE orfds;
2255 int timeoutval;
2256 int *local_timeout;
2257 extern int proc_buffered_char[];
2258 #ifndef subprocesses
2259 int process_tick = 0, update_tick = 0;
2260 #else
2261 extern int process_tick, update_tick;
2262 #endif
2263 SIGTYPE (*old_trap) ();
2264 unsigned char buf;
2265
2266 #if defined (HAVE_SELECT) && defined (HAVE_X_WINDOWS)
2267 /* If we're using X, then the native select will work; we only need the
2268 emulation for non-X usage. */
2269 if (!NILP (Vwindow_system))
2270 return select (nfds, rfds, wfds, efds, timeout);
2271 #endif
2272 timeoutval = timeout ? EMACS_SECS (*timeout) : 100000;
2273 local_timeout = &timeoutval;
2274 FD_ZERO (&orfds);
2275 if (rfds)
2276 {
2277 orfds = *rfds;
2278 FD_ZERO (rfds);
2279 }
2280 if (wfds)
2281 FD_ZERO (wfds);
2282 if (efds)
2283 FD_ZERO (efds);
2284
2285 /* If we are looking only for the terminal, with no timeout,
2286 just read it and wait -- that's more efficient. */
2287 if (*local_timeout == 100000 && process_tick == update_tick
2288 && FD_ISSET (0, &orfds))
2289 {
2290 int fd;
2291 for (fd = 1; fd < nfds; ++fd)
2292 if (FD_ISSET (fd, &orfds))
2293 goto hardway;
2294 if (! detect_input_pending ())
2295 read_input_waiting ();
2296 FD_SET (0, rfds);
2297 return 1;
2298 }
2299
2300 hardway:
2301 /* Once a second, till the timer expires, check all the flagged read
2302 * descriptors to see if any input is available. If there is some then
2303 * set the corresponding bit in the return copy of rfds.
2304 */
2305 while (1)
2306 {
2307 register int to_check, fd;
2308
2309 if (rfds)
2310 {
2311 for (to_check = nfds, fd = 0; --to_check >= 0; fd++)
2312 {
2313 if (FD_ISSET (fd, &orfds))
2314 {
2315 int avail = 0, status = 0;
2316
2317 if (fd == 0)
2318 avail = detect_input_pending (); /* Special keyboard handler */
2319 else
2320 {
2321 #ifdef FIONREAD
2322 status = ioctl (fd, FIONREAD, &avail);
2323 #else /* no FIONREAD */
2324 #ifdef MSDOS
2325 abort (); /* I don't think we need it. */
2326 #else /* not MSDOS */
2327 /* Hoping it will return -1 if nothing available
2328 or 0 if all 0 chars requested are read. */
2329 if (proc_buffered_char[fd] >= 0)
2330 avail = 1;
2331 else
2332 {
2333 avail = read (fd, &buf, 1);
2334 if (avail > 0)
2335 proc_buffered_char[fd] = buf;
2336 }
2337 #endif /* not MSDOS */
2338 #endif /* no FIONREAD */
2339 }
2340 if (status >= 0 && avail > 0)
2341 {
2342 FD_SET (fd, rfds);
2343 ravail++;
2344 }
2345 }
2346 }
2347 }
2348 if (*local_timeout == 0 || ravail != 0 || process_tick != update_tick)
2349 break;
2350 old_alarm = alarm (0);
2351 old_trap = signal (SIGALRM, select_alarm);
2352 select_alarmed = 0;
2353 alarm (SELECT_PAUSE);
2354 /* Wait for a SIGALRM (or maybe a SIGTINT) */
2355 while (select_alarmed == 0 && *local_timeout != 0
2356 && process_tick == update_tick)
2357 {
2358 #ifdef MSDOS
2359 sleep_or_kbd_hit (SELECT_PAUSE, FD_ISSET (0, &orfds) != 0);
2360 select_alarm ();
2361 #else /* not MSDOS */
2362 /* If we are interested in terminal input,
2363 wait by reading the terminal.
2364 That makes instant wakeup for terminal input at least. */
2365 if (FD_ISSET (0, &orfds))
2366 {
2367 read_input_waiting ();
2368 if (detect_input_pending ())
2369 select_alarmed = 1;
2370 }
2371 else
2372 pause ();
2373 #endif /* not MSDOS */
2374 }
2375 (*local_timeout) -= SELECT_PAUSE;
2376 /* Reset the old alarm if there was one */
2377 alarm (0);
2378 signal (SIGALRM, old_trap);
2379 if (old_alarm != 0)
2380 {
2381 /* Reset or forge an interrupt for the original handler. */
2382 old_alarm -= SELECT_PAUSE;
2383 if (old_alarm <= 0)
2384 kill (getpid (), SIGALRM); /* Fake an alarm with the orig' handler */
2385 else
2386 alarm (old_alarm);
2387 }
2388 if (*local_timeout == 0) /* Stop on timer being cleared */
2389 break;
2390 }
2391 return ravail;
2392 }
2393 #endif /* not WINDOWSNT */
2394
2395 /* Read keyboard input into the standard buffer,
2396 waiting for at least one character. */
2397
2398 /* Make all keyboard buffers much bigger when using X windows. */
2399 #ifdef HAVE_X_WINDOWS
2400 #define BUFFER_SIZE_FACTOR 16
2401 #else
2402 #define BUFFER_SIZE_FACTOR 1
2403 #endif
2404
2405 read_input_waiting ()
2406 {
2407 struct input_event e;
2408 int nread, i;
2409 extern int quit_char;
2410
2411 if (read_socket_hook)
2412 {
2413 struct input_event buf[256];
2414
2415 read_alarm_should_throw = 0;
2416 if (! setjmp (read_alarm_throw))
2417 nread = (*read_socket_hook) (0, buf, 256, 1, 0);
2418 else
2419 nread = -1;
2420
2421 /* Scan the chars for C-g and store them in kbd_buffer. */
2422 for (i = 0; i < nread; i++)
2423 {
2424 kbd_buffer_store_event (&buf[i]);
2425 /* Don't look at input that follows a C-g too closely.
2426 This reduces lossage due to autorepeat on C-g. */
2427 if (buf[i].kind == ascii_keystroke
2428 && buf[i].code == quit_char)
2429 break;
2430 }
2431 }
2432 else
2433 {
2434 char buf[3];
2435 nread = read (fileno (stdin), buf, 1);
2436
2437 /* Scan the chars for C-g and store them in kbd_buffer. */
2438 e.kind = ascii_keystroke;
2439 XSETFRAME (e.frame_or_window, selected_frame);
2440 e.modifiers = 0;
2441 for (i = 0; i < nread; i++)
2442 {
2443 /* Convert chars > 0177 to meta events if desired.
2444 We do this under the same conditions that read_avail_input does. */
2445 if (read_socket_hook == 0)
2446 {
2447 /* If the user says she has a meta key, then believe her. */
2448 if (meta_key == 1 && (buf[i] & 0x80))
2449 e.modifiers = meta_modifier;
2450 if (meta_key != 2)
2451 buf[i] &= ~0x80;
2452 }
2453
2454 XSETINT (e.code, buf[i]);
2455 kbd_buffer_store_event (&e);
2456 /* Don't look at input that follows a C-g too closely.
2457 This reduces lossage due to autorepeat on C-g. */
2458 if (buf[i] == quit_char)
2459 break;
2460 }
2461 }
2462 }
2463
2464 #endif /* not HAVE_SELECT */
2465 #endif /* not VMS */
2466 \f
2467 #ifdef BSD4_1
2468 /*
2469 * Partially emulate 4.2 open call.
2470 * open is defined as this in 4.1.
2471 *
2472 * - added by Michael Bloom @ Citicorp/TTI
2473 *
2474 */
2475
2476 int
2477 sys_open (path, oflag, mode)
2478 char *path;
2479 int oflag, mode;
2480 {
2481 if (oflag & O_CREAT)
2482 return creat (path, mode);
2483 else
2484 return open (path, oflag);
2485 }
2486
2487 init_sigio (fd)
2488 int fd;
2489 {
2490 if (noninteractive)
2491 return;
2492 lmode = LINTRUP | lmode;
2493 ioctl (fd, TIOCLSET, &lmode);
2494 }
2495
2496 reset_sigio ()
2497 {
2498 if (noninteractive)
2499 return;
2500 lmode = ~LINTRUP & lmode;
2501 ioctl (0, TIOCLSET, &lmode);
2502 }
2503
2504 request_sigio ()
2505 {
2506 sigrelse (SIGTINT);
2507
2508 interrupts_deferred = 0;
2509 }
2510
2511 unrequest_sigio ()
2512 {
2513 sighold (SIGTINT);
2514
2515 interrupts_deferred = 1;
2516 }
2517
2518 /* still inside #ifdef BSD4_1 */
2519 #ifdef subprocesses
2520
2521 int sigheld; /* Mask of held signals */
2522
2523 sigholdx (signum)
2524 int signum;
2525 {
2526 sigheld |= sigbit (signum);
2527 sighold (signum);
2528 }
2529
2530 sigisheld (signum)
2531 int signum;
2532 {
2533 sigheld |= sigbit (signum);
2534 }
2535
2536 sigunhold (signum)
2537 int signum;
2538 {
2539 sigheld &= ~sigbit (signum);
2540 sigrelse (signum);
2541 }
2542
2543 sigfree () /* Free all held signals */
2544 {
2545 int i;
2546 for (i = 0; i < NSIG; i++)
2547 if (sigheld & sigbit (i))
2548 sigrelse (i);
2549 sigheld = 0;
2550 }
2551
2552 sigbit (i)
2553 {
2554 return 1 << (i - 1);
2555 }
2556 #endif /* subprocesses */
2557 #endif /* BSD4_1 */
2558 \f
2559 /* POSIX signals support - DJB */
2560 /* Anyone with POSIX signals should have ANSI C declarations */
2561
2562 #ifdef POSIX_SIGNALS
2563
2564 sigset_t old_mask, empty_mask, full_mask, temp_mask;
2565 static struct sigaction new_action, old_action;
2566
2567 init_signals ()
2568 {
2569 sigemptyset (&empty_mask);
2570 sigfillset (&full_mask);
2571 }
2572
2573 signal_handler_t
2574 sys_signal (int signal_number, signal_handler_t action)
2575 {
2576 #ifdef DGUX
2577 /* This gets us restartable system calls for efficiency.
2578 The "else" code will works as well. */
2579 return (berk_signal (signal_number, action));
2580 #else
2581 sigemptyset (&new_action.sa_mask);
2582 new_action.sa_handler = action;
2583 #ifdef SA_RESTART
2584 /* Emacs mostly works better with restartable system services. If this
2585 * flag exists, we probably want to turn it on here.
2586 */
2587 new_action.sa_flags = SA_RESTART;
2588 #else
2589 new_action.sa_flags = 0;
2590 #endif
2591 sigaction (signal_number, &new_action, &old_action);
2592 return (old_action.sa_handler);
2593 #endif /* DGUX */
2594 }
2595
2596 #ifndef __GNUC__
2597 /* If we're compiling with GCC, we don't need this function, since it
2598 can be written as a macro. */
2599 sigset_t
2600 sys_sigmask (int sig)
2601 {
2602 sigset_t mask;
2603 sigemptyset (&mask);
2604 sigaddset (&mask, sig);
2605 return mask;
2606 }
2607 #endif
2608
2609 int
2610 sys_sigpause (sigset_t new_mask)
2611 {
2612 /* pause emulating berk sigpause... */
2613 sigsuspend (&new_mask);
2614 return (EINTR);
2615 }
2616
2617 /* I'd like to have these guys return pointers to the mask storage in here,
2618 but there'd be trouble if the code was saving multiple masks. I'll be
2619 safe and pass the structure. It normally won't be more than 2 bytes
2620 anyhow. - DJB */
2621
2622 sigset_t
2623 sys_sigblock (sigset_t new_mask)
2624 {
2625 sigset_t old_mask;
2626 sigprocmask (SIG_BLOCK, &new_mask, &old_mask);
2627 return (old_mask);
2628 }
2629
2630 sigset_t
2631 sys_sigunblock (sigset_t new_mask)
2632 {
2633 sigset_t old_mask;
2634 sigprocmask (SIG_UNBLOCK, &new_mask, &old_mask);
2635 return (old_mask);
2636 }
2637
2638 sigset_t
2639 sys_sigsetmask (sigset_t new_mask)
2640 {
2641 sigset_t old_mask;
2642 sigprocmask (SIG_SETMASK, &new_mask, &old_mask);
2643 return (old_mask);
2644 }
2645
2646 #endif /* POSIX_SIGNALS */
2647 \f
2648 #ifndef HAVE_RANDOM
2649 #ifdef random
2650 #define HAVE_RANDOM
2651 #endif
2652 #endif
2653
2654 /* Figure out how many bits the system's random number generator uses.
2655 `random' and `lrand48' are assumed to return 31 usable bits.
2656 BSD `rand' returns a 31 bit value but the low order bits are unusable;
2657 so we'll shift it and treat it like the 15-bit USG `rand'. */
2658
2659 #ifndef RAND_BITS
2660 # ifdef HAVE_RANDOM
2661 # define RAND_BITS 31
2662 # else /* !HAVE_RANDOM */
2663 # ifdef HAVE_LRAND48
2664 # define RAND_BITS 31
2665 # define random lrand48
2666 # else /* !HAVE_LRAND48 */
2667 # define RAND_BITS 15
2668 # if RAND_MAX == 32767
2669 # define random rand
2670 # else /* RAND_MAX != 32767 */
2671 # if RAND_MAX == 2147483647
2672 # define random() (rand () >> 16)
2673 # else /* RAND_MAX != 2147483647 */
2674 # ifdef USG
2675 # define random rand
2676 # else
2677 # define random() (rand () >> 16)
2678 # endif /* !BSD */
2679 # endif /* RAND_MAX != 2147483647 */
2680 # endif /* RAND_MAX != 32767 */
2681 # endif /* !HAVE_LRAND48 */
2682 # endif /* !HAVE_RANDOM */
2683 #endif /* !RAND_BITS */
2684
2685 void
2686 seed_random (arg)
2687 long arg;
2688 {
2689 #ifdef HAVE_RANDOM
2690 srandom ((unsigned int)arg);
2691 #else
2692 # ifdef HAVE_LRAND48
2693 srand48 (arg);
2694 # else
2695 srand ((unsigned int)arg);
2696 # endif
2697 #endif
2698 }
2699
2700 /*
2701 * Build a full Emacs-sized word out of whatever we've got.
2702 * This suffices even for a 64-bit architecture with a 15-bit rand.
2703 */
2704 long
2705 get_random ()
2706 {
2707 long val = random ();
2708 #if VALBITS > RAND_BITS
2709 val = (val << RAND_BITS) ^ random ();
2710 #if VALBITS > 2*RAND_BITS
2711 val = (val << RAND_BITS) ^ random ();
2712 #if VALBITS > 3*RAND_BITS
2713 val = (val << RAND_BITS) ^ random ();
2714 #if VALBITS > 4*RAND_BITS
2715 val = (val << RAND_BITS) ^ random ();
2716 #endif /* need at least 5 */
2717 #endif /* need at least 4 */
2718 #endif /* need at least 3 */
2719 #endif /* need at least 2 */
2720 return val & ((1L << VALBITS) - 1);
2721 }
2722 \f
2723 #ifdef WRONG_NAME_INSQUE
2724
2725 insque (q,p)
2726 caddr_t q,p;
2727 {
2728 _insque (q,p);
2729 }
2730
2731 #endif
2732 \f
2733 #ifdef VMS
2734
2735 #ifdef getenv
2736 /* If any place else asks for the TERM variable,
2737 allow it to be overridden with the EMACS_TERM variable
2738 before attempting to translate the logical name TERM. As a last
2739 resort, ask for VAX C's special idea of the TERM variable. */
2740 #undef getenv
2741 char *
2742 sys_getenv (name)
2743 char *name;
2744 {
2745 register char *val;
2746 static char buf[256];
2747 static struct dsc$descriptor_s equiv
2748 = {sizeof (buf), DSC$K_DTYPE_T, DSC$K_CLASS_S, buf};
2749 static struct dsc$descriptor_s d_name
2750 = {0, DSC$K_DTYPE_T, DSC$K_CLASS_S, 0};
2751 short eqlen;
2752
2753 if (!strcmp (name, "TERM"))
2754 {
2755 val = (char *) getenv ("EMACS_TERM");
2756 if (val)
2757 return val;
2758 }
2759
2760 d_name.dsc$w_length = strlen (name);
2761 d_name.dsc$a_pointer = name;
2762 if (LIB$SYS_TRNLOG (&d_name, &eqlen, &equiv) == 1)
2763 {
2764 char *str = (char *) xmalloc (eqlen + 1);
2765 bcopy (buf, str, eqlen);
2766 str[eqlen] = '\0';
2767 /* This is a storage leak, but a pain to fix. With luck,
2768 no one will ever notice. */
2769 return str;
2770 }
2771 return (char *) getenv (name);
2772 }
2773 #endif /* getenv */
2774
2775 #ifdef abort
2776 /* Since VMS doesn't believe in core dumps, the only way to debug this beast is
2777 to force a call on the debugger from within the image. */
2778 #undef abort
2779 sys_abort ()
2780 {
2781 reset_sys_modes ();
2782 LIB$SIGNAL (SS$_DEBUG);
2783 }
2784 #endif /* abort */
2785 #endif /* VMS */
2786 \f
2787 #ifdef VMS
2788 #ifdef LINK_CRTL_SHARE
2789 #ifdef SHAREABLE_LIB_BUG
2790 /* Variables declared noshare and initialized in sharable libraries
2791 cannot be shared. The VMS linker incorrectly forces you to use a private
2792 version which is uninitialized... If not for this "feature", we
2793 could use the C library definition of sys_nerr and sys_errlist. */
2794 int sys_nerr = 35;
2795 char *sys_errlist[] =
2796 {
2797 "error 0",
2798 "not owner",
2799 "no such file or directory",
2800 "no such process",
2801 "interrupted system call",
2802 "i/o error",
2803 "no such device or address",
2804 "argument list too long",
2805 "exec format error",
2806 "bad file number",
2807 "no child process",
2808 "no more processes",
2809 "not enough memory",
2810 "permission denied",
2811 "bad address",
2812 "block device required",
2813 "mount devices busy",
2814 "file exists",
2815 "cross-device link",
2816 "no such device",
2817 "not a directory",
2818 "is a directory",
2819 "invalid argument",
2820 "file table overflow",
2821 "too many open files",
2822 "not a typewriter",
2823 "text file busy",
2824 "file too big",
2825 "no space left on device",
2826 "illegal seek",
2827 "read-only file system",
2828 "too many links",
2829 "broken pipe",
2830 "math argument",
2831 "result too large",
2832 "I/O stream empty",
2833 "vax/vms specific error code nontranslatable error"
2834 };
2835 #endif /* SHAREABLE_LIB_BUG */
2836 #endif /* LINK_CRTL_SHARE */
2837 #endif /* VMS */
2838
2839 #ifndef HAVE_STRERROR
2840 #ifndef WINDOWSNT
2841 char *
2842 strerror (errnum)
2843 int errnum;
2844 {
2845 extern char *sys_errlist[];
2846 extern int sys_nerr;
2847
2848 if (errnum >= 0 && errnum < sys_nerr)
2849 return sys_errlist[errnum];
2850 return (char *) "Unknown error";
2851 }
2852 #endif /* not WINDOWSNT */
2853 #endif /* ! HAVE_STRERROR */
2854 \f
2855 #ifdef INTERRUPTIBLE_OPEN
2856
2857 int
2858 /* VARARGS 2 */
2859 sys_open (path, oflag, mode)
2860 char *path;
2861 int oflag, mode;
2862 {
2863 register int rtnval;
2864
2865 while ((rtnval = open (path, oflag, mode)) == -1
2866 && (errno == EINTR));
2867 return (rtnval);
2868 }
2869
2870 #endif /* INTERRUPTIBLE_OPEN */
2871
2872 #ifdef INTERRUPTIBLE_CLOSE
2873
2874 sys_close (fd)
2875 int fd;
2876 {
2877 register int rtnval;
2878
2879 while ((rtnval = close (fd)) == -1
2880 && (errno == EINTR));
2881 return rtnval;
2882 }
2883
2884 #endif /* INTERRUPTIBLE_CLOSE */
2885
2886 #ifdef INTERRUPTIBLE_IO
2887
2888 int
2889 sys_read (fildes, buf, nbyte)
2890 int fildes;
2891 char *buf;
2892 unsigned int nbyte;
2893 {
2894 register int rtnval;
2895
2896 while ((rtnval = read (fildes, buf, nbyte)) == -1
2897 && (errno == EINTR));
2898 return (rtnval);
2899 }
2900
2901 int
2902 sys_write (fildes, buf, nbyte)
2903 int fildes;
2904 char *buf;
2905 unsigned int nbyte;
2906 {
2907 register int rtnval, bytes_written;
2908
2909 bytes_written = 0;
2910
2911 while (nbyte > 0)
2912 {
2913 rtnval = write (fildes, buf, nbyte);
2914
2915 if (rtnval == -1)
2916 {
2917 if (errno == EINTR)
2918 continue;
2919 else
2920 return (bytes_written ? bytes_written : -1);
2921 }
2922
2923 buf += rtnval;
2924 nbyte -= rtnval;
2925 bytes_written += rtnval;
2926 }
2927 return (bytes_written);
2928 }
2929
2930 #endif /* INTERRUPTIBLE_IO */
2931 \f
2932 #ifndef HAVE_VFORK
2933 #ifndef WINDOWSNT
2934 /*
2935 * Substitute fork for vfork on USG flavors.
2936 */
2937
2938 vfork ()
2939 {
2940 return (fork ());
2941 }
2942 #endif /* not WINDOWSNT */
2943 #endif /* not HAVE_VFORK */
2944 \f
2945 #ifdef USG
2946 /*
2947 * All of the following are for USG.
2948 *
2949 * On USG systems the system calls are INTERRUPTIBLE by signals
2950 * that the user program has elected to catch. Thus the system call
2951 * must be retried in these cases. To handle this without massive
2952 * changes in the source code, we remap the standard system call names
2953 * to names for our own functions in sysdep.c that do the system call
2954 * with retries. Actually, for portability reasons, it is good
2955 * programming practice, as this example shows, to limit all actual
2956 * system calls to a single occurrence in the source. Sure, this
2957 * adds an extra level of function call overhead but it is almost
2958 * always negligible. Fred Fish, Unisoft Systems Inc.
2959 */
2960
2961 #ifndef HAVE_SYS_SIGLIST
2962 char *sys_siglist[NSIG + 1] =
2963 {
2964 #ifdef AIX
2965 /* AIX has changed the signals a bit */
2966 "bogus signal", /* 0 */
2967 "hangup", /* 1 SIGHUP */
2968 "interrupt", /* 2 SIGINT */
2969 "quit", /* 3 SIGQUIT */
2970 "illegal instruction", /* 4 SIGILL */
2971 "trace trap", /* 5 SIGTRAP */
2972 "IOT instruction", /* 6 SIGIOT */
2973 "crash likely", /* 7 SIGDANGER */
2974 "floating point exception", /* 8 SIGFPE */
2975 "kill", /* 9 SIGKILL */
2976 "bus error", /* 10 SIGBUS */
2977 "segmentation violation", /* 11 SIGSEGV */
2978 "bad argument to system call", /* 12 SIGSYS */
2979 "write on a pipe with no one to read it", /* 13 SIGPIPE */
2980 "alarm clock", /* 14 SIGALRM */
2981 "software termination signum", /* 15 SIGTERM */
2982 "user defined signal 1", /* 16 SIGUSR1 */
2983 "user defined signal 2", /* 17 SIGUSR2 */
2984 "death of a child", /* 18 SIGCLD */
2985 "power-fail restart", /* 19 SIGPWR */
2986 "bogus signal", /* 20 */
2987 "bogus signal", /* 21 */
2988 "bogus signal", /* 22 */
2989 "bogus signal", /* 23 */
2990 "bogus signal", /* 24 */
2991 "LAN I/O interrupt", /* 25 SIGAIO */
2992 "PTY I/O interrupt", /* 26 SIGPTY */
2993 "I/O intervention required", /* 27 SIGIOINT */
2994 #ifdef AIXHFT
2995 "HFT grant", /* 28 SIGGRANT */
2996 "HFT retract", /* 29 SIGRETRACT */
2997 "HFT sound done", /* 30 SIGSOUND */
2998 "HFT input ready", /* 31 SIGMSG */
2999 #endif
3000 #else /* not AIX */
3001 "bogus signal", /* 0 */
3002 "hangup", /* 1 SIGHUP */
3003 "interrupt", /* 2 SIGINT */
3004 "quit", /* 3 SIGQUIT */
3005 "illegal instruction", /* 4 SIGILL */
3006 "trace trap", /* 5 SIGTRAP */
3007 "IOT instruction", /* 6 SIGIOT */
3008 "EMT instruction", /* 7 SIGEMT */
3009 "floating point exception", /* 8 SIGFPE */
3010 "kill", /* 9 SIGKILL */
3011 "bus error", /* 10 SIGBUS */
3012 "segmentation violation", /* 11 SIGSEGV */
3013 "bad argument to system call", /* 12 SIGSYS */
3014 "write on a pipe with no one to read it", /* 13 SIGPIPE */
3015 "alarm clock", /* 14 SIGALRM */
3016 "software termination signum", /* 15 SIGTERM */
3017 "user defined signal 1", /* 16 SIGUSR1 */
3018 "user defined signal 2", /* 17 SIGUSR2 */
3019 "death of a child", /* 18 SIGCLD */
3020 "power-fail restart", /* 19 SIGPWR */
3021 #ifdef sun
3022 "window size change", /* 20 SIGWINCH */
3023 "urgent socket condition", /* 21 SIGURG */
3024 "pollable event occured", /* 22 SIGPOLL */
3025 "stop (cannot be caught or ignored)", /* 23 SIGSTOP */
3026 "user stop requested from tty", /* 24 SIGTSTP */
3027 "stopped process has been continued", /* 25 SIGCONT */
3028 "background tty read attempted", /* 26 SIGTTIN */
3029 "background tty write attempted", /* 27 SIGTTOU */
3030 "virtual timer expired", /* 28 SIGVTALRM */
3031 "profiling timer expired", /* 29 SIGPROF */
3032 "exceeded cpu limit", /* 30 SIGXCPU */
3033 "exceeded file size limit", /* 31 SIGXFSZ */
3034 "process's lwps are blocked", /* 32 SIGWAITING */
3035 "special signal used by thread library", /* 33 SIGLWP */
3036 #ifdef SIGFREEZE
3037 "Special Signal Used By CPR", /* 34 SIGFREEZE */
3038 #endif
3039 #ifdef SIGTHAW
3040 "Special Signal Used By CPR", /* 35 SIGTHAW */
3041 #endif
3042 #endif /* sun */
3043 #endif /* not AIX */
3044 0
3045 };
3046 #endif /* HAVE_SYS_SIGLIST */
3047
3048 /*
3049 * Warning, this function may not duplicate 4.2 action properly
3050 * under error conditions.
3051 */
3052
3053 #ifndef MAXPATHLEN
3054 /* In 4.1, param.h fails to define this. */
3055 #define MAXPATHLEN 1024
3056 #endif
3057
3058 #ifndef HAVE_GETWD
3059
3060 char *
3061 getwd (pathname)
3062 char *pathname;
3063 {
3064 char *npath, *spath;
3065 extern char *getcwd ();
3066
3067 BLOCK_INPUT; /* getcwd uses malloc */
3068 spath = npath = getcwd ((char *) 0, MAXPATHLEN);
3069 if (spath == 0)
3070 return spath;
3071 /* On Altos 3068, getcwd can return @hostname/dir, so discard
3072 up to first slash. Should be harmless on other systems. */
3073 while (*npath && *npath != '/')
3074 npath++;
3075 strcpy (pathname, npath);
3076 free (spath); /* getcwd uses malloc */
3077 UNBLOCK_INPUT;
3078 return pathname;
3079 }
3080
3081 #endif /* HAVE_GETWD */
3082
3083 /*
3084 * Emulate rename using unlink/link. Note that this is
3085 * only partially correct. Also, doesn't enforce restriction
3086 * that files be of same type (regular->regular, dir->dir, etc).
3087 */
3088
3089 #ifndef HAVE_RENAME
3090
3091 rename (from, to)
3092 const char *from;
3093 const char *to;
3094 {
3095 if (access (from, 0) == 0)
3096 {
3097 unlink (to);
3098 if (link (from, to) == 0)
3099 if (unlink (from) == 0)
3100 return (0);
3101 }
3102 return (-1);
3103 }
3104
3105 #endif
3106
3107
3108 #ifdef HPUX
3109 #ifndef HAVE_PERROR
3110
3111 /* HPUX curses library references perror, but as far as we know
3112 it won't be called. Anyway this definition will do for now. */
3113
3114 perror ()
3115 {
3116 }
3117
3118 #endif /* not HAVE_PERROR */
3119 #endif /* HPUX */
3120
3121 #ifndef HAVE_DUP2
3122
3123 /*
3124 * Emulate BSD dup2. First close newd if it already exists.
3125 * Then, attempt to dup oldd. If not successful, call dup2 recursively
3126 * until we are, then close the unsuccessful ones.
3127 */
3128
3129 dup2 (oldd, newd)
3130 int oldd;
3131 int newd;
3132 {
3133 register int fd, ret;
3134
3135 sys_close (newd);
3136
3137 #ifdef F_DUPFD
3138 fd = fcntl (oldd, F_DUPFD, newd);
3139 if (fd != newd)
3140 error ("can't dup2 (%i,%i) : %s", oldd, newd, strerror (errno));
3141 #else
3142 fd = dup (old);
3143 if (fd == -1)
3144 return -1;
3145 if (fd == new)
3146 return new;
3147 ret = dup2 (old,new);
3148 sys_close (fd);
3149 return ret;
3150 #endif
3151 }
3152
3153 #endif /* not HAVE_DUP2 */
3154
3155 /*
3156 * Gettimeofday. Simulate as much as possible. Only accurate
3157 * to nearest second. Emacs doesn't use tzp so ignore it for now.
3158 * Only needed when subprocesses are defined.
3159 */
3160
3161 #ifdef subprocesses
3162 #ifndef VMS
3163 #ifndef HAVE_GETTIMEOFDAY
3164 #ifdef HAVE_TIMEVAL
3165
3166 /* ARGSUSED */
3167 gettimeofday (tp, tzp)
3168 struct timeval *tp;
3169 struct timezone *tzp;
3170 {
3171 extern long time ();
3172
3173 tp->tv_sec = time ((long *)0);
3174 tp->tv_usec = 0;
3175 if (tzp != 0)
3176 tzp->tz_minuteswest = -1;
3177 }
3178
3179 #endif
3180 #endif
3181 #endif
3182 #endif /* subprocess && !HAVE_GETTIMEOFDAY && HAVE_TIMEVAL && !VMS */
3183
3184 /*
3185 * This function will go away as soon as all the stubs fixed. (fnf)
3186 */
3187
3188 croak (badfunc)
3189 char *badfunc;
3190 {
3191 printf ("%s not yet implemented\r\n", badfunc);
3192 reset_sys_modes ();
3193 exit (1);
3194 }
3195
3196 #endif /* USG */
3197 \f
3198 #ifdef DGUX
3199
3200 char *sys_siglist[NSIG + 1] =
3201 {
3202 "null signal", /* 0 SIGNULL */
3203 "hangup", /* 1 SIGHUP */
3204 "interrupt", /* 2 SIGINT */
3205 "quit", /* 3 SIGQUIT */
3206 "illegal instruction", /* 4 SIGILL */
3207 "trace trap", /* 5 SIGTRAP */
3208 "abort termination", /* 6 SIGABRT */
3209 "SIGEMT", /* 7 SIGEMT */
3210 "floating point exception", /* 8 SIGFPE */
3211 "kill", /* 9 SIGKILL */
3212 "bus error", /* 10 SIGBUS */
3213 "segmentation violation", /* 11 SIGSEGV */
3214 "bad argument to system call", /* 12 SIGSYS */
3215 "write on a pipe with no reader", /* 13 SIGPIPE */
3216 "alarm clock", /* 14 SIGALRM */
3217 "software termination signal", /* 15 SIGTERM */
3218 "user defined signal 1", /* 16 SIGUSR1 */
3219 "user defined signal 2", /* 17 SIGUSR2 */
3220 "child stopped or terminated", /* 18 SIGCLD */
3221 "power-fail restart", /* 19 SIGPWR */
3222 "window size changed", /* 20 SIGWINCH */
3223 "undefined", /* 21 */
3224 "pollable event occurred", /* 22 SIGPOLL */
3225 "sendable stop signal not from tty", /* 23 SIGSTOP */
3226 "stop signal from tty", /* 24 SIGSTP */
3227 "continue a stopped process", /* 25 SIGCONT */
3228 "attempted background tty read", /* 26 SIGTTIN */
3229 "attempted background tty write", /* 27 SIGTTOU */
3230 "undefined", /* 28 */
3231 "undefined", /* 29 */
3232 "undefined", /* 30 */
3233 "undefined", /* 31 */
3234 "undefined", /* 32 */
3235 "socket (TCP/IP) urgent data arrival", /* 33 SIGURG */
3236 "I/O is possible", /* 34 SIGIO */
3237 "exceeded cpu time limit", /* 35 SIGXCPU */
3238 "exceeded file size limit", /* 36 SIGXFSZ */
3239 "virtual time alarm", /* 37 SIGVTALRM */
3240 "profiling time alarm", /* 38 SIGPROF */
3241 "undefined", /* 39 */
3242 "file record locks revoked", /* 40 SIGLOST */
3243 "undefined", /* 41 */
3244 "undefined", /* 42 */
3245 "undefined", /* 43 */
3246 "undefined", /* 44 */
3247 "undefined", /* 45 */
3248 "undefined", /* 46 */
3249 "undefined", /* 47 */
3250 "undefined", /* 48 */
3251 "undefined", /* 49 */
3252 "undefined", /* 50 */
3253 "undefined", /* 51 */
3254 "undefined", /* 52 */
3255 "undefined", /* 53 */
3256 "undefined", /* 54 */
3257 "undefined", /* 55 */
3258 "undefined", /* 56 */
3259 "undefined", /* 57 */
3260 "undefined", /* 58 */
3261 "undefined", /* 59 */
3262 "undefined", /* 60 */
3263 "undefined", /* 61 */
3264 "undefined", /* 62 */
3265 "undefined", /* 63 */
3266 "notification message in mess. queue", /* 64 SIGDGNOTIFY */
3267 0
3268 };
3269
3270 #endif /* DGUX */
3271 \f
3272 /* Directory routines for systems that don't have them. */
3273
3274 #ifdef SYSV_SYSTEM_DIR
3275
3276 #include <dirent.h>
3277
3278 #if defined(BROKEN_CLOSEDIR) || !defined(HAVE_CLOSEDIR)
3279
3280 int
3281 closedir (dirp)
3282 register DIR *dirp; /* stream from opendir */
3283 {
3284 int rtnval;
3285
3286 rtnval = sys_close (dirp->dd_fd);
3287
3288 /* Some systems (like Solaris) allocate the buffer and the DIR all
3289 in one block. Why in the world are we freeing this ourselves
3290 anyway? */
3291 #if ! (defined (sun) && defined (USG5_4))
3292 xfree ((char *) dirp->dd_buf); /* directory block defined in <dirent.h> */
3293 #endif
3294 xfree ((char *) dirp);
3295
3296 return rtnval;
3297 }
3298 #endif /* BROKEN_CLOSEDIR or not HAVE_CLOSEDIR */
3299 #endif /* SYSV_SYSTEM_DIR */
3300
3301 #ifdef NONSYSTEM_DIR_LIBRARY
3302
3303 DIR *
3304 opendir (filename)
3305 char *filename; /* name of directory */
3306 {
3307 register DIR *dirp; /* -> malloc'ed storage */
3308 register int fd; /* file descriptor for read */
3309 struct stat sbuf; /* result of fstat */
3310
3311 fd = sys_open (filename, 0);
3312 if (fd < 0)
3313 return 0;
3314
3315 BLOCK_INPUT;
3316 if (fstat (fd, &sbuf) < 0
3317 || (sbuf.st_mode & S_IFMT) != S_IFDIR
3318 || (dirp = (DIR *) malloc (sizeof (DIR))) == 0)
3319 {
3320 sys_close (fd);
3321 UNBLOCK_INPUT;
3322 return 0; /* bad luck today */
3323 }
3324 UNBLOCK_INPUT;
3325
3326 dirp->dd_fd = fd;
3327 dirp->dd_loc = dirp->dd_size = 0; /* refill needed */
3328
3329 return dirp;
3330 }
3331
3332 void
3333 closedir (dirp)
3334 register DIR *dirp; /* stream from opendir */
3335 {
3336 sys_close (dirp->dd_fd);
3337 xfree ((char *) dirp);
3338 }
3339
3340
3341 #ifndef VMS
3342 #define DIRSIZ 14
3343 struct olddir
3344 {
3345 ino_t od_ino; /* inode */
3346 char od_name[DIRSIZ]; /* filename */
3347 };
3348 #endif /* not VMS */
3349
3350 struct direct dir_static; /* simulated directory contents */
3351
3352 /* ARGUSED */
3353 struct direct *
3354 readdir (dirp)
3355 register DIR *dirp; /* stream from opendir */
3356 {
3357 #ifndef VMS
3358 register struct olddir *dp; /* -> directory data */
3359 #else /* VMS */
3360 register struct dir$_name *dp; /* -> directory data */
3361 register struct dir$_version *dv; /* -> version data */
3362 #endif /* VMS */
3363
3364 for (; ;)
3365 {
3366 if (dirp->dd_loc >= dirp->dd_size)
3367 dirp->dd_loc = dirp->dd_size = 0;
3368
3369 if (dirp->dd_size == 0 /* refill buffer */
3370 && (dirp->dd_size = sys_read (dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ)) <= 0)
3371 return 0;
3372
3373 #ifndef VMS
3374 dp = (struct olddir *) &dirp->dd_buf[dirp->dd_loc];
3375 dirp->dd_loc += sizeof (struct olddir);
3376
3377 if (dp->od_ino != 0) /* not deleted entry */
3378 {
3379 dir_static.d_ino = dp->od_ino;
3380 strncpy (dir_static.d_name, dp->od_name, DIRSIZ);
3381 dir_static.d_name[DIRSIZ] = '\0';
3382 dir_static.d_namlen = strlen (dir_static.d_name);
3383 dir_static.d_reclen = sizeof (struct direct)
3384 - MAXNAMLEN + 3
3385 + dir_static.d_namlen - dir_static.d_namlen % 4;
3386 return &dir_static; /* -> simulated structure */
3387 }
3388 #else /* VMS */
3389 dp = (struct dir$_name *) dirp->dd_buf;
3390 if (dirp->dd_loc == 0)
3391 dirp->dd_loc = (dp->dir$b_namecount&1) ? dp->dir$b_namecount + 1
3392 : dp->dir$b_namecount;
3393 dv = (struct dir$_version *)&dp->dir$t_name[dirp->dd_loc];
3394 dir_static.d_ino = dv->dir$w_fid_num;
3395 dir_static.d_namlen = dp->dir$b_namecount;
3396 dir_static.d_reclen = sizeof (struct direct)
3397 - MAXNAMLEN + 3
3398 + dir_static.d_namlen - dir_static.d_namlen % 4;
3399 strncpy (dir_static.d_name, dp->dir$t_name, dp->dir$b_namecount);
3400 dir_static.d_name[dir_static.d_namlen] = '\0';
3401 dirp->dd_loc = dirp->dd_size; /* only one record at a time */
3402 return &dir_static;
3403 #endif /* VMS */
3404 }
3405 }
3406
3407 #ifdef VMS
3408 /* readdirver is just like readdir except it returns all versions of a file
3409 as separate entries. */
3410
3411 /* ARGUSED */
3412 struct direct *
3413 readdirver (dirp)
3414 register DIR *dirp; /* stream from opendir */
3415 {
3416 register struct dir$_name *dp; /* -> directory data */
3417 register struct dir$_version *dv; /* -> version data */
3418
3419 if (dirp->dd_loc >= dirp->dd_size - sizeof (struct dir$_name))
3420 dirp->dd_loc = dirp->dd_size = 0;
3421
3422 if (dirp->dd_size == 0 /* refill buffer */
3423 && (dirp->dd_size = sys_read (dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ)) <= 0)
3424 return 0;
3425
3426 dp = (struct dir$_name *) dirp->dd_buf;
3427 if (dirp->dd_loc == 0)
3428 dirp->dd_loc = (dp->dir$b_namecount & 1) ? dp->dir$b_namecount + 1
3429 : dp->dir$b_namecount;
3430 dv = (struct dir$_version *) &dp->dir$t_name[dirp->dd_loc];
3431 strncpy (dir_static.d_name, dp->dir$t_name, dp->dir$b_namecount);
3432 sprintf (&dir_static.d_name[dp->dir$b_namecount], ";%d", dv->dir$w_version);
3433 dir_static.d_namlen = strlen (dir_static.d_name);
3434 dir_static.d_ino = dv->dir$w_fid_num;
3435 dir_static.d_reclen = sizeof (struct direct) - MAXNAMLEN + 3
3436 + dir_static.d_namlen - dir_static.d_namlen % 4;
3437 dirp->dd_loc = ((char *) (++dv) - dp->dir$t_name);
3438 return &dir_static;
3439 }
3440
3441 #endif /* VMS */
3442
3443 #endif /* NONSYSTEM_DIR_LIBRARY */
3444
3445 \f
3446 int
3447 set_file_times (filename, atime, mtime)
3448 char *filename;
3449 EMACS_TIME atime, mtime;
3450 {
3451 #ifdef HAVE_UTIMES
3452 struct timeval tv[2];
3453 tv[0] = atime;
3454 tv[1] = mtime;
3455 return utimes (filename, tv);
3456 #else /* not HAVE_UTIMES */
3457 struct utimbuf utb;
3458 utb.actime = EMACS_SECS (atime);
3459 utb.modtime = EMACS_SECS (mtime);
3460 return utime (filename, &utb);
3461 #endif /* not HAVE_UTIMES */
3462 }
3463 \f
3464 /* mkdir and rmdir functions, for systems which don't have them. */
3465
3466 #ifndef HAVE_MKDIR
3467 /*
3468 * Written by Robert Rother, Mariah Corporation, August 1985.
3469 *
3470 * If you want it, it's yours. All I ask in return is that if you
3471 * figure out how to do this in a Bourne Shell script you send me
3472 * a copy.
3473 * sdcsvax!rmr or rmr@uscd
3474 *
3475 * Severely hacked over by John Gilmore to make a 4.2BSD compatible
3476 * subroutine. 11Mar86; hoptoad!gnu
3477 *
3478 * Modified by rmtodd@uokmax 6-28-87 -- when making an already existing dir,
3479 * subroutine didn't return EEXIST. It does now.
3480 */
3481
3482 /*
3483 * Make a directory.
3484 */
3485 #ifdef MKDIR_PROTOTYPE
3486 MKDIR_PROTOTYPE
3487 #else
3488 int
3489 mkdir (dpath, dmode)
3490 char *dpath;
3491 int dmode;
3492 #endif
3493 {
3494 int cpid, status, fd;
3495 struct stat statbuf;
3496
3497 if (stat (dpath, &statbuf) == 0)
3498 {
3499 errno = EEXIST; /* Stat worked, so it already exists */
3500 return -1;
3501 }
3502
3503 /* If stat fails for a reason other than non-existence, return error */
3504 if (errno != ENOENT)
3505 return -1;
3506
3507 synch_process_alive = 1;
3508 switch (cpid = fork ())
3509 {
3510
3511 case -1: /* Error in fork */
3512 return (-1); /* Errno is set already */
3513
3514 case 0: /* Child process */
3515 /*
3516 * Cheap hack to set mode of new directory. Since this
3517 * child process is going away anyway, we zap its umask.
3518 * FIXME, this won't suffice to set SUID, SGID, etc. on this
3519 * directory. Does anybody care?
3520 */
3521 status = umask (0); /* Get current umask */
3522 status = umask (status | (0777 & ~dmode)); /* Set for mkdir */
3523 fd = sys_open("/dev/null", 2);
3524 if (fd >= 0)
3525 {
3526 dup2 (fd, 0);
3527 dup2 (fd, 1);
3528 dup2 (fd, 2);
3529 }
3530 execl ("/bin/mkdir", "mkdir", dpath, (char *) 0);
3531 _exit (-1); /* Can't exec /bin/mkdir */
3532
3533 default: /* Parent process */
3534 wait_for_termination (cpid);
3535 }
3536
3537 if (synch_process_death != 0 || synch_process_retcode != 0)
3538 {
3539 errno = EIO; /* We don't know why, but */
3540 return -1; /* /bin/mkdir failed */
3541 }
3542
3543 return 0;
3544 }
3545 #endif /* not HAVE_MKDIR */
3546
3547 #ifndef HAVE_RMDIR
3548 int
3549 rmdir (dpath)
3550 char *dpath;
3551 {
3552 int cpid, status, fd;
3553 struct stat statbuf;
3554
3555 if (stat (dpath, &statbuf) != 0)
3556 {
3557 /* Stat just set errno. We don't have to */
3558 return -1;
3559 }
3560
3561 synch_process_alive = 1;
3562 switch (cpid = fork ())
3563 {
3564
3565 case -1: /* Error in fork */
3566 return (-1); /* Errno is set already */
3567
3568 case 0: /* Child process */
3569 fd = sys_open("/dev/null", 2);
3570 if (fd >= 0)
3571 {
3572 dup2 (fd, 0);
3573 dup2 (fd, 1);
3574 dup2 (fd, 2);
3575 }
3576 wait_for_termination (cpid);
3577 if (synch_process_death != 0 || synch_process_retcode != 0)
3578 return -1; /* /bin/rmdir failed */
3579 default: /* Parent process */
3580 while (cpid != wait (&status)); /* Wait for kid to finish */
3581 }
3582
3583 if (WIFSIGNALED (status) || WEXITSTATUS (status) != 0)
3584 {
3585 errno = EIO; /* We don't know why, but */
3586 return -1; /* /bin/mkdir failed */
3587 }
3588
3589 return 0;
3590 }
3591 #endif /* !HAVE_RMDIR */
3592
3593
3594 \f
3595 /* Functions for VMS */
3596 #ifdef VMS
3597 #include "vms-pwd.h"
3598 #include <acldef.h>
3599 #include <chpdef.h>
3600 #include <jpidef.h>
3601
3602 /* Return as a string the VMS error string pertaining to STATUS.
3603 Reuses the same static buffer each time it is called. */
3604
3605 char *
3606 vmserrstr (status)
3607 int status; /* VMS status code */
3608 {
3609 int bufadr[2];
3610 short len;
3611 static char buf[257];
3612
3613 bufadr[0] = sizeof buf - 1;
3614 bufadr[1] = (int) buf;
3615 if (! (SYS$GETMSG (status, &len, bufadr, 0x1, 0) & 1))
3616 return "untranslatable VMS error status";
3617 buf[len] = '\0';
3618 return buf;
3619 }
3620
3621 #ifdef access
3622 #undef access
3623
3624 /* The following is necessary because 'access' emulation by VMS C (2.0) does
3625 * not work correctly. (It also doesn't work well in version 2.3.)
3626 */
3627
3628 #ifdef VMS4_4
3629
3630 #define DESCRIPTOR(name,string) struct dsc$descriptor_s name = \
3631 { strlen (string), DSC$K_DTYPE_T, DSC$K_CLASS_S, string }
3632
3633 typedef union {
3634 struct {
3635 unsigned short s_buflen;
3636 unsigned short s_code;
3637 char *s_bufadr;
3638 unsigned short *s_retlenadr;
3639 } s;
3640 int end;
3641 } item;
3642 #define buflen s.s_buflen
3643 #define code s.s_code
3644 #define bufadr s.s_bufadr
3645 #define retlenadr s.s_retlenadr
3646
3647 #define R_OK 4 /* test for read permission */
3648 #define W_OK 2 /* test for write permission */
3649 #define X_OK 1 /* test for execute (search) permission */
3650 #define F_OK 0 /* test for presence of file */
3651
3652 int
3653 sys_access (path, mode)
3654 char *path;
3655 int mode;
3656 {
3657 static char *user = NULL;
3658 char dir_fn[512];
3659
3660 /* translate possible directory spec into .DIR file name, so brain-dead
3661 * access can treat the directory like a file. */
3662 if (directory_file_name (path, dir_fn))
3663 path = dir_fn;
3664
3665 if (mode == F_OK)
3666 return access (path, mode);
3667 if (user == NULL && (user = (char *) getenv ("USER")) == NULL)
3668 return -1;
3669 {
3670 int stat;
3671 int flags;
3672 int acces;
3673 unsigned short int dummy;
3674 item itemlst[3];
3675 static int constant = ACL$C_FILE;
3676 DESCRIPTOR (path_desc, path);
3677 DESCRIPTOR (user_desc, user);
3678
3679 flags = 0;
3680 acces = 0;
3681 if ((mode & X_OK) && ((stat = access (path, mode)) < 0 || mode == X_OK))
3682 return stat;
3683 if (mode & R_OK)
3684 acces |= CHP$M_READ;
3685 if (mode & W_OK)
3686 acces |= CHP$M_WRITE;
3687 itemlst[0].buflen = sizeof (int);
3688 itemlst[0].code = CHP$_FLAGS;
3689 itemlst[0].bufadr = (char *) &flags;
3690 itemlst[0].retlenadr = &dummy;
3691 itemlst[1].buflen = sizeof (int);
3692 itemlst[1].code = CHP$_ACCESS;
3693 itemlst[1].bufadr = (char *) &acces;
3694 itemlst[1].retlenadr = &dummy;
3695 itemlst[2].end = CHP$_END;
3696 stat = SYS$CHECK_ACCESS (&constant, &path_desc, &user_desc, itemlst);
3697 return stat == SS$_NORMAL ? 0 : -1;
3698 }
3699 }
3700
3701 #else /* not VMS4_4 */
3702
3703 #include <prvdef.h>
3704 #define ACE$M_WRITE 2
3705 #define ACE$C_KEYID 1
3706
3707 static unsigned short memid, grpid;
3708 static unsigned int uic;
3709
3710 /* Called from init_sys_modes, so it happens not very often
3711 but at least each time Emacs is loaded. */
3712 sys_access_reinit ()
3713 {
3714 uic = 0;
3715 }
3716
3717 int
3718 sys_access (filename, type)
3719 char * filename;
3720 int type;
3721 {
3722 struct FAB fab;
3723 struct XABPRO xab;
3724 int status, size, i, typecode, acl_controlled;
3725 unsigned int *aclptr, *aclend, aclbuf[60];
3726 union prvdef prvmask;
3727
3728 /* Get UIC and GRP values for protection checking. */
3729 if (uic == 0)
3730 {
3731 status = LIB$GETJPI (&JPI$_UIC, 0, 0, &uic, 0, 0);
3732 if (! (status & 1))
3733 return -1;
3734 memid = uic & 0xFFFF;
3735 grpid = uic >> 16;
3736 }
3737
3738 if (type != 2) /* not checking write access */
3739 return access (filename, type);
3740
3741 /* Check write protection. */
3742
3743 #define CHECKPRIV(bit) (prvmask.bit)
3744 #define WRITEABLE(field) (! ((xab.xab$w_pro >> field) & XAB$M_NOWRITE))
3745
3746 /* Find privilege bits */
3747 status = SYS$SETPRV (0, 0, 0, prvmask);
3748 if (! (status & 1))
3749 error ("Unable to find privileges: %s", vmserrstr (status));
3750 if (CHECKPRIV (PRV$V_BYPASS))
3751 return 0; /* BYPASS enabled */
3752 fab = cc$rms_fab;
3753 fab.fab$b_fac = FAB$M_GET;
3754 fab.fab$l_fna = filename;
3755 fab.fab$b_fns = strlen (filename);
3756 fab.fab$l_xab = &xab;
3757 xab = cc$rms_xabpro;
3758 xab.xab$l_aclbuf = aclbuf;
3759 xab.xab$w_aclsiz = sizeof (aclbuf);
3760 status = SYS$OPEN (&fab, 0, 0);
3761 if (! (status & 1))
3762 return -1;
3763 SYS$CLOSE (&fab, 0, 0);
3764 /* Check system access */
3765 if (CHECKPRIV (PRV$V_SYSPRV) && WRITEABLE (XAB$V_SYS))
3766 return 0;
3767 /* Check ACL entries, if any */
3768 acl_controlled = 0;
3769 if (xab.xab$w_acllen > 0)
3770 {
3771 aclptr = aclbuf;
3772 aclend = &aclbuf[xab.xab$w_acllen / 4];
3773 while (*aclptr && aclptr < aclend)
3774 {
3775 size = (*aclptr & 0xff) / 4;
3776 typecode = (*aclptr >> 8) & 0xff;
3777 if (typecode == ACE$C_KEYID)
3778 for (i = size - 1; i > 1; i--)
3779 if (aclptr[i] == uic)
3780 {
3781 acl_controlled = 1;
3782 if (aclptr[1] & ACE$M_WRITE)
3783 return 0; /* Write access through ACL */
3784 }
3785 aclptr = &aclptr[size];
3786 }
3787 if (acl_controlled) /* ACL specified, prohibits write access */
3788 return -1;
3789 }
3790 /* No ACL entries specified, check normal protection */
3791 if (WRITEABLE (XAB$V_WLD)) /* World writeable */
3792 return 0;
3793 if (WRITEABLE (XAB$V_GRP) &&
3794 (unsigned short) (xab.xab$l_uic >> 16) == grpid)
3795 return 0; /* Group writeable */
3796 if (WRITEABLE (XAB$V_OWN) &&
3797 (xab.xab$l_uic & 0xFFFF) == memid)
3798 return 0; /* Owner writeable */
3799
3800 return -1; /* Not writeable */
3801 }
3802 #endif /* not VMS4_4 */
3803 #endif /* access */
3804
3805 static char vtbuf[NAM$C_MAXRSS+1];
3806
3807 /* translate a vms file spec to a unix path */
3808 char *
3809 sys_translate_vms (vfile)
3810 char * vfile;
3811 {
3812 char * p;
3813 char * targ;
3814
3815 if (!vfile)
3816 return 0;
3817
3818 targ = vtbuf;
3819
3820 /* leading device or logical name is a root directory */
3821 if (p = strchr (vfile, ':'))
3822 {
3823 *targ++ = '/';
3824 while (vfile < p)
3825 *targ++ = *vfile++;
3826 vfile++;
3827 *targ++ = '/';
3828 }
3829 p = vfile;
3830 if (*p == '[' || *p == '<')
3831 {
3832 while (*++vfile != *p + 2)
3833 switch (*vfile)
3834 {
3835 case '.':
3836 if (vfile[-1] == *p)
3837 *targ++ = '.';
3838 *targ++ = '/';
3839 break;
3840
3841 case '-':
3842 *targ++ = '.';
3843 *targ++ = '.';
3844 break;
3845
3846 default:
3847 *targ++ = *vfile;
3848 break;
3849 }
3850 vfile++;
3851 *targ++ = '/';
3852 }
3853 while (*vfile)
3854 *targ++ = *vfile++;
3855
3856 return vtbuf;
3857 }
3858
3859 static char utbuf[NAM$C_MAXRSS+1];
3860
3861 /* translate a unix path to a VMS file spec */
3862 char *
3863 sys_translate_unix (ufile)
3864 char * ufile;
3865 {
3866 int slash_seen = 0;
3867 char *p;
3868 char * targ;
3869
3870 if (!ufile)
3871 return 0;
3872
3873 targ = utbuf;
3874
3875 if (*ufile == '/')
3876 {
3877 ufile++;
3878 }
3879
3880 while (*ufile)
3881 {
3882 switch (*ufile)
3883 {
3884 case '/':
3885 if (slash_seen)
3886 if (index (&ufile[1], '/'))
3887 *targ++ = '.';
3888 else
3889 *targ++ = ']';
3890 else
3891 {
3892 *targ++ = ':';
3893 if (index (&ufile[1], '/'))
3894 *targ++ = '[';
3895 slash_seen = 1;
3896 }
3897 break;
3898
3899 case '.':
3900 if (strncmp (ufile, "./", 2) == 0)
3901 {
3902 if (!slash_seen)
3903 {
3904 *targ++ = '[';
3905 slash_seen = 1;
3906 }
3907 ufile++; /* skip the dot */
3908 if (index (&ufile[1], '/'))
3909 *targ++ = '.';
3910 else
3911 *targ++ = ']';
3912 }
3913 else if (strncmp (ufile, "../", 3) == 0)
3914 {
3915 if (!slash_seen)
3916 {
3917 *targ++ = '[';
3918 slash_seen = 1;
3919 }
3920 *targ++ = '-';
3921 ufile += 2; /* skip the dots */
3922 if (index (&ufile[1], '/'))
3923 *targ++ = '.';
3924 else
3925 *targ++ = ']';
3926 }
3927 else
3928 *targ++ = *ufile;
3929 break;
3930
3931 default:
3932 *targ++ = *ufile;
3933 break;
3934 }
3935 ufile++;
3936 }
3937 *targ = '\0';
3938
3939 return utbuf;
3940 }
3941
3942 char *
3943 getwd (pathname)
3944 char *pathname;
3945 {
3946 char *ptr, *val;
3947 extern char *getcwd ();
3948
3949 #define MAXPATHLEN 1024
3950
3951 ptr = xmalloc (MAXPATHLEN);
3952 val = getcwd (ptr, MAXPATHLEN);
3953 if (val == 0)
3954 {
3955 xfree (ptr);
3956 return val;
3957 }
3958 strcpy (pathname, ptr);
3959 xfree (ptr);
3960
3961 return pathname;
3962 }
3963
3964 getppid ()
3965 {
3966 long item_code = JPI$_OWNER;
3967 unsigned long parent_id;
3968 int status;
3969
3970 if (((status = LIB$GETJPI (&item_code, 0, 0, &parent_id)) & 1) == 0)
3971 {
3972 errno = EVMSERR;
3973 vaxc$errno = status;
3974 return -1;
3975 }
3976 return parent_id;
3977 }
3978
3979 #undef getuid
3980 unsigned
3981 sys_getuid ()
3982 {
3983 return (getgid () << 16) | getuid ();
3984 }
3985
3986 int
3987 sys_read (fildes, buf, nbyte)
3988 int fildes;
3989 char *buf;
3990 unsigned int nbyte;
3991 {
3992 return read (fildes, buf, (nbyte < MAXIOSIZE ? nbyte : MAXIOSIZE));
3993 }
3994
3995 #if 0
3996 int
3997 sys_write (fildes, buf, nbyte)
3998 int fildes;
3999 char *buf;
4000 unsigned int nbyte;
4001 {
4002 register int nwrote, rtnval = 0;
4003
4004 while (nbyte > MAXIOSIZE && (nwrote = write (fildes, buf, MAXIOSIZE)) > 0) {
4005 nbyte -= nwrote;
4006 buf += nwrote;
4007 rtnval += nwrote;
4008 }
4009 if (nwrote < 0)
4010 return rtnval ? rtnval : -1;
4011 if ((nwrote = write (fildes, buf, nbyte)) < 0)
4012 return rtnval ? rtnval : -1;
4013 return (rtnval + nwrote);
4014 }
4015 #endif /* 0 */
4016
4017 /*
4018 * VAX/VMS VAX C RTL really loses. It insists that records
4019 * end with a newline (carriage return) character, and if they
4020 * don't it adds one (nice of it isn't it!)
4021 *
4022 * Thus we do this stupidity below.
4023 */
4024
4025 int
4026 sys_write (fildes, buf, nbytes)
4027 int fildes;
4028 char *buf;
4029 unsigned int nbytes;
4030 {
4031 register char *p;
4032 register char *e;
4033 int sum = 0;
4034 struct stat st;
4035
4036 fstat (fildes, &st);
4037 p = buf;
4038 while (nbytes > 0)
4039 {
4040 int len, retval;
4041
4042 /* Handle fixed-length files with carriage control. */
4043 if (st.st_fab_rfm == FAB$C_FIX
4044 && ((st.st_fab_rat & (FAB$M_FTN | FAB$M_CR)) != 0))
4045 {
4046 len = st.st_fab_mrs;
4047 retval = write (fildes, p, min (len, nbytes));
4048 if (retval != len)
4049 return -1;
4050 retval++; /* This skips the implied carriage control */
4051 }
4052 else
4053 {
4054 e = p + min (MAXIOSIZE, nbytes) - 1;
4055 while (*e != '\n' && e > p) e--;
4056 if (p == e) /* Ok.. so here we add a newline... sigh. */
4057 e = p + min (MAXIOSIZE, nbytes) - 1;
4058 len = e + 1 - p;
4059 retval = write (fildes, p, len);
4060 if (retval != len)
4061 return -1;
4062 }
4063 p += retval;
4064 sum += retval;
4065 nbytes -= retval;
4066 }
4067 return sum;
4068 }
4069
4070 /* Create file NEW copying its attributes from file OLD. If
4071 OLD is 0 or does not exist, create based on the value of
4072 vms_stmlf_recfm. */
4073
4074 /* Protection value the file should ultimately have.
4075 Set by create_copy_attrs, and use by rename_sansversions. */
4076 static unsigned short int fab_final_pro;
4077
4078 int
4079 creat_copy_attrs (old, new)
4080 char *old, *new;
4081 {
4082 struct FAB fab = cc$rms_fab;
4083 struct XABPRO xabpro;
4084 char aclbuf[256]; /* Choice of size is arbitrary. See below. */
4085 extern int vms_stmlf_recfm;
4086
4087 if (old)
4088 {
4089 fab.fab$b_fac = FAB$M_GET;
4090 fab.fab$l_fna = old;
4091 fab.fab$b_fns = strlen (old);
4092 fab.fab$l_xab = (char *) &xabpro;
4093 xabpro = cc$rms_xabpro;
4094 xabpro.xab$l_aclbuf = aclbuf;
4095 xabpro.xab$w_aclsiz = sizeof aclbuf;
4096 /* Call $OPEN to fill in the fab & xabpro fields. */
4097 if (SYS$OPEN (&fab, 0, 0) & 1)
4098 {
4099 SYS$CLOSE (&fab, 0, 0);
4100 fab.fab$l_alq = 0; /* zero the allocation quantity */
4101 if (xabpro.xab$w_acllen > 0)
4102 {
4103 if (xabpro.xab$w_acllen > sizeof aclbuf)
4104 /* If the acl buffer was too short, redo open with longer one.
4105 Wouldn't need to do this if there were some system imposed
4106 limit on the size of an ACL, but I can't find any such. */
4107 {
4108 xabpro.xab$l_aclbuf = (char *) alloca (xabpro.xab$w_acllen);
4109 xabpro.xab$w_aclsiz = xabpro.xab$w_acllen;
4110 if (SYS$OPEN (&fab, 0, 0) & 1)
4111 SYS$CLOSE (&fab, 0, 0);
4112 else
4113 old = 0;
4114 }
4115 }
4116 else
4117 xabpro.xab$l_aclbuf = 0;
4118 }
4119 else
4120 old = 0;
4121 }
4122 fab.fab$l_fna = new;
4123 fab.fab$b_fns = strlen (new);
4124 if (!old)
4125 {
4126 fab.fab$l_xab = 0;
4127 fab.fab$b_rfm = vms_stmlf_recfm ? FAB$C_STMLF : FAB$C_VAR;
4128 fab.fab$b_rat = FAB$M_CR;
4129 }
4130
4131 /* Set the file protections such that we will be able to manipulate
4132 this file. Once we are done writing and renaming it, we will set
4133 the protections back. */
4134 if (old)
4135 fab_final_pro = xabpro.xab$w_pro;
4136 else
4137 SYS$SETDFPROT (0, &fab_final_pro);
4138 xabpro.xab$w_pro &= 0xff0f; /* set O:rewd for now. This is set back later. */
4139
4140 /* Create the new file with either default attrs or attrs copied
4141 from old file. */
4142 if (!(SYS$CREATE (&fab, 0, 0) & 1))
4143 return -1;
4144 SYS$CLOSE (&fab, 0, 0);
4145 /* As this is a "replacement" for creat, return a file descriptor
4146 opened for writing. */
4147 return open (new, O_WRONLY);
4148 }
4149
4150 #ifdef creat
4151 #undef creat
4152 #include <varargs.h>
4153 #ifdef __GNUC__
4154 #ifndef va_count
4155 #define va_count(X) ((X) = *(((int *) &(va_alist)) - 1))
4156 #endif
4157 #endif
4158
4159 sys_creat (va_alist)
4160 va_dcl
4161 {
4162 va_list list_incrementer;
4163 char *name;
4164 int mode;
4165 int rfd; /* related file descriptor */
4166 int fd; /* Our new file descriptor */
4167 int count;
4168 struct stat st_buf;
4169 char rfm[12];
4170 char rat[15];
4171 char mrs[13];
4172 char fsz[13];
4173 extern int vms_stmlf_recfm;
4174
4175 va_count (count);
4176 va_start (list_incrementer);
4177 name = va_arg (list_incrementer, char *);
4178 mode = va_arg (list_incrementer, int);
4179 if (count > 2)
4180 rfd = va_arg (list_incrementer, int);
4181 va_end (list_incrementer);
4182 if (count > 2)
4183 {
4184 /* Use information from the related file descriptor to set record
4185 format of the newly created file. */
4186 fstat (rfd, &st_buf);
4187 switch (st_buf.st_fab_rfm)
4188 {
4189 case FAB$C_FIX:
4190 strcpy (rfm, "rfm = fix");
4191 sprintf (mrs, "mrs = %d", st_buf.st_fab_mrs);
4192 strcpy (rat, "rat = ");
4193 if (st_buf.st_fab_rat & FAB$M_CR)
4194 strcat (rat, "cr");
4195 else if (st_buf.st_fab_rat & FAB$M_FTN)
4196 strcat (rat, "ftn");
4197 else if (st_buf.st_fab_rat & FAB$M_PRN)
4198 strcat (rat, "prn");
4199 if (st_buf.st_fab_rat & FAB$M_BLK)
4200 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4201 strcat (rat, ", blk");
4202 else
4203 strcat (rat, "blk");
4204 return creat (name, 0, rfm, rat, mrs);
4205
4206 case FAB$C_VFC:
4207 strcpy (rfm, "rfm = vfc");
4208 sprintf (fsz, "fsz = %d", st_buf.st_fab_fsz);
4209 strcpy (rat, "rat = ");
4210 if (st_buf.st_fab_rat & FAB$M_CR)
4211 strcat (rat, "cr");
4212 else if (st_buf.st_fab_rat & FAB$M_FTN)
4213 strcat (rat, "ftn");
4214 else if (st_buf.st_fab_rat & FAB$M_PRN)
4215 strcat (rat, "prn");
4216 if (st_buf.st_fab_rat & FAB$M_BLK)
4217 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4218 strcat (rat, ", blk");
4219 else
4220 strcat (rat, "blk");
4221 return creat (name, 0, rfm, rat, fsz);
4222
4223 case FAB$C_STM:
4224 strcpy (rfm, "rfm = stm");
4225 break;
4226
4227 case FAB$C_STMCR:
4228 strcpy (rfm, "rfm = stmcr");
4229 break;
4230
4231 case FAB$C_STMLF:
4232 strcpy (rfm, "rfm = stmlf");
4233 break;
4234
4235 case FAB$C_UDF:
4236 strcpy (rfm, "rfm = udf");
4237 break;
4238
4239 case FAB$C_VAR:
4240 strcpy (rfm, "rfm = var");
4241 break;
4242 }
4243 strcpy (rat, "rat = ");
4244 if (st_buf.st_fab_rat & FAB$M_CR)
4245 strcat (rat, "cr");
4246 else if (st_buf.st_fab_rat & FAB$M_FTN)
4247 strcat (rat, "ftn");
4248 else if (st_buf.st_fab_rat & FAB$M_PRN)
4249 strcat (rat, "prn");
4250 if (st_buf.st_fab_rat & FAB$M_BLK)
4251 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4252 strcat (rat, ", blk");
4253 else
4254 strcat (rat, "blk");
4255 }
4256 else
4257 {
4258 strcpy (rfm, vms_stmlf_recfm ? "rfm = stmlf" : "rfm=var");
4259 strcpy (rat, "rat=cr");
4260 }
4261 /* Until the VAX C RTL fixes the many bugs with modes, always use
4262 mode 0 to get the user's default protection. */
4263 fd = creat (name, 0, rfm, rat);
4264 if (fd < 0 && errno == EEXIST)
4265 {
4266 if (unlink (name) < 0)
4267 report_file_error ("delete", build_string (name));
4268 fd = creat (name, 0, rfm, rat);
4269 }
4270 return fd;
4271 }
4272 #endif /* creat */
4273
4274 /* fwrite to stdout is S L O W. Speed it up by using fputc...*/
4275 sys_fwrite (ptr, size, num, fp)
4276 register char * ptr;
4277 FILE * fp;
4278 {
4279 register int tot = num * size;
4280
4281 while (tot--)
4282 fputc (*ptr++, fp);
4283 }
4284
4285 /*
4286 * The VMS C library routine creat actually creates a new version of an
4287 * existing file rather than truncating the old version. There are times
4288 * when this is not the desired behavior, for instance, when writing an
4289 * auto save file (you only want one version), or when you don't have
4290 * write permission in the directory containing the file (but the file
4291 * itself is writable). Hence this routine, which is equivalent to
4292 * "close (creat (fn, 0));" on Unix if fn already exists.
4293 */
4294 int
4295 vms_truncate (fn)
4296 char *fn;
4297 {
4298 struct FAB xfab = cc$rms_fab;
4299 struct RAB xrab = cc$rms_rab;
4300 int status;
4301
4302 xfab.fab$l_fop = FAB$M_TEF; /* free allocated but unused blocks on close */
4303 xfab.fab$b_fac = FAB$M_TRN | FAB$M_GET; /* allow truncate and get access */
4304 xfab.fab$b_shr = FAB$M_NIL; /* allow no sharing - file must be locked */
4305 xfab.fab$l_fna = fn;
4306 xfab.fab$b_fns = strlen (fn);
4307 xfab.fab$l_dna = ";0"; /* default to latest version of the file */
4308 xfab.fab$b_dns = 2;
4309 xrab.rab$l_fab = &xfab;
4310
4311 /* This gibberish opens the file, positions to the first record, and
4312 deletes all records from there until the end of file. */
4313 if ((SYS$OPEN (&xfab) & 01) == 01)
4314 {
4315 if ((SYS$CONNECT (&xrab) & 01) == 01 &&
4316 (SYS$FIND (&xrab) & 01) == 01 &&
4317 (SYS$TRUNCATE (&xrab) & 01) == 01)
4318 status = 0;
4319 else
4320 status = -1;
4321 }
4322 else
4323 status = -1;
4324 SYS$CLOSE (&xfab);
4325 return status;
4326 }
4327
4328 /* Define this symbol to actually read SYSUAF.DAT. This requires either
4329 SYSPRV or a readable SYSUAF.DAT. */
4330
4331 #ifdef READ_SYSUAF
4332 /*
4333 * getuaf.c
4334 *
4335 * Routine to read the VMS User Authorization File and return
4336 * a specific user's record.
4337 */
4338
4339 static struct UAF retuaf;
4340
4341 struct UAF *
4342 get_uaf_name (uname)
4343 char * uname;
4344 {
4345 register status;
4346 struct FAB uaf_fab;
4347 struct RAB uaf_rab;
4348
4349 uaf_fab = cc$rms_fab;
4350 uaf_rab = cc$rms_rab;
4351 /* initialize fab fields */
4352 uaf_fab.fab$l_fna = "SYS$SYSTEM:SYSUAF.DAT";
4353 uaf_fab.fab$b_fns = 21;
4354 uaf_fab.fab$b_fac = FAB$M_GET;
4355 uaf_fab.fab$b_org = FAB$C_IDX;
4356 uaf_fab.fab$b_shr = FAB$M_GET|FAB$M_PUT|FAB$M_UPD|FAB$M_DEL;
4357 /* initialize rab fields */
4358 uaf_rab.rab$l_fab = &uaf_fab;
4359 /* open the User Authorization File */
4360 status = SYS$OPEN (&uaf_fab);
4361 if (!(status&1))
4362 {
4363 errno = EVMSERR;
4364 vaxc$errno = status;
4365 return 0;
4366 }
4367 status = SYS$CONNECT (&uaf_rab);
4368 if (!(status&1))
4369 {
4370 errno = EVMSERR;
4371 vaxc$errno = status;
4372 return 0;
4373 }
4374 /* read the requested record - index is in uname */
4375 uaf_rab.rab$l_kbf = uname;
4376 uaf_rab.rab$b_ksz = strlen (uname);
4377 uaf_rab.rab$b_rac = RAB$C_KEY;
4378 uaf_rab.rab$l_ubf = (char *)&retuaf;
4379 uaf_rab.rab$w_usz = sizeof retuaf;
4380 status = SYS$GET (&uaf_rab);
4381 if (!(status&1))
4382 {
4383 errno = EVMSERR;
4384 vaxc$errno = status;
4385 return 0;
4386 }
4387 /* close the User Authorization File */
4388 status = SYS$DISCONNECT (&uaf_rab);
4389 if (!(status&1))
4390 {
4391 errno = EVMSERR;
4392 vaxc$errno = status;
4393 return 0;
4394 }
4395 status = SYS$CLOSE (&uaf_fab);
4396 if (!(status&1))
4397 {
4398 errno = EVMSERR;
4399 vaxc$errno = status;
4400 return 0;
4401 }
4402 return &retuaf;
4403 }
4404
4405 struct UAF *
4406 get_uaf_uic (uic)
4407 unsigned long uic;
4408 {
4409 register status;
4410 struct FAB uaf_fab;
4411 struct RAB uaf_rab;
4412
4413 uaf_fab = cc$rms_fab;
4414 uaf_rab = cc$rms_rab;
4415 /* initialize fab fields */
4416 uaf_fab.fab$l_fna = "SYS$SYSTEM:SYSUAF.DAT";
4417 uaf_fab.fab$b_fns = 21;
4418 uaf_fab.fab$b_fac = FAB$M_GET;
4419 uaf_fab.fab$b_org = FAB$C_IDX;
4420 uaf_fab.fab$b_shr = FAB$M_GET|FAB$M_PUT|FAB$M_UPD|FAB$M_DEL;
4421 /* initialize rab fields */
4422 uaf_rab.rab$l_fab = &uaf_fab;
4423 /* open the User Authorization File */
4424 status = SYS$OPEN (&uaf_fab);
4425 if (!(status&1))
4426 {
4427 errno = EVMSERR;
4428 vaxc$errno = status;
4429 return 0;
4430 }
4431 status = SYS$CONNECT (&uaf_rab);
4432 if (!(status&1))
4433 {
4434 errno = EVMSERR;
4435 vaxc$errno = status;
4436 return 0;
4437 }
4438 /* read the requested record - index is in uic */
4439 uaf_rab.rab$b_krf = 1; /* 1st alternate key */
4440 uaf_rab.rab$l_kbf = (char *) &uic;
4441 uaf_rab.rab$b_ksz = sizeof uic;
4442 uaf_rab.rab$b_rac = RAB$C_KEY;
4443 uaf_rab.rab$l_ubf = (char *)&retuaf;
4444 uaf_rab.rab$w_usz = sizeof retuaf;
4445 status = SYS$GET (&uaf_rab);
4446 if (!(status&1))
4447 {
4448 errno = EVMSERR;
4449 vaxc$errno = status;
4450 return 0;
4451 }
4452 /* close the User Authorization File */
4453 status = SYS$DISCONNECT (&uaf_rab);
4454 if (!(status&1))
4455 {
4456 errno = EVMSERR;
4457 vaxc$errno = status;
4458 return 0;
4459 }
4460 status = SYS$CLOSE (&uaf_fab);
4461 if (!(status&1))
4462 {
4463 errno = EVMSERR;
4464 vaxc$errno = status;
4465 return 0;
4466 }
4467 return &retuaf;
4468 }
4469
4470 static struct passwd retpw;
4471
4472 struct passwd *
4473 cnv_uaf_pw (up)
4474 struct UAF * up;
4475 {
4476 char * ptr;
4477
4478 /* copy these out first because if the username is 32 chars, the next
4479 section will overwrite the first byte of the UIC */
4480 retpw.pw_uid = up->uaf$w_mem;
4481 retpw.pw_gid = up->uaf$w_grp;
4482
4483 /* I suppose this is not the best sytle, to possibly overwrite one
4484 byte beyond the end of the field, but what the heck... */
4485 ptr = &up->uaf$t_username[UAF$S_USERNAME];
4486 while (ptr[-1] == ' ')
4487 ptr--;
4488 *ptr = '\0';
4489 strcpy (retpw.pw_name, up->uaf$t_username);
4490
4491 /* the rest of these are counted ascii strings */
4492 strncpy (retpw.pw_gecos, &up->uaf$t_owner[1], up->uaf$t_owner[0]);
4493 retpw.pw_gecos[up->uaf$t_owner[0]] = '\0';
4494 strncpy (retpw.pw_dir, &up->uaf$t_defdev[1], up->uaf$t_defdev[0]);
4495 retpw.pw_dir[up->uaf$t_defdev[0]] = '\0';
4496 strncat (retpw.pw_dir, &up->uaf$t_defdir[1], up->uaf$t_defdir[0]);
4497 retpw.pw_dir[up->uaf$t_defdev[0] + up->uaf$t_defdir[0]] = '\0';
4498 strncpy (retpw.pw_shell, &up->uaf$t_defcli[1], up->uaf$t_defcli[0]);
4499 retpw.pw_shell[up->uaf$t_defcli[0]] = '\0';
4500
4501 return &retpw;
4502 }
4503 #else /* not READ_SYSUAF */
4504 static struct passwd retpw;
4505 #endif /* not READ_SYSUAF */
4506
4507 struct passwd *
4508 getpwnam (name)
4509 char * name;
4510 {
4511 #ifdef READ_SYSUAF
4512 struct UAF *up;
4513 #else
4514 char * user;
4515 char * dir;
4516 unsigned char * full;
4517 #endif /* READ_SYSUAF */
4518 char *ptr = name;
4519
4520 while (*ptr)
4521 {
4522 if ('a' <= *ptr && *ptr <= 'z')
4523 *ptr -= 040;
4524 ptr++;
4525 }
4526 #ifdef READ_SYSUAF
4527 if (!(up = get_uaf_name (name)))
4528 return 0;
4529 return cnv_uaf_pw (up);
4530 #else
4531 if (strcmp (name, getenv ("USER")) == 0)
4532 {
4533 retpw.pw_uid = getuid ();
4534 retpw.pw_gid = getgid ();
4535 strcpy (retpw.pw_name, name);
4536 if (full = egetenv ("FULLNAME"))
4537 strcpy (retpw.pw_gecos, full);
4538 else
4539 *retpw.pw_gecos = '\0';
4540 strcpy (retpw.pw_dir, egetenv ("HOME"));
4541 *retpw.pw_shell = '\0';
4542 return &retpw;
4543 }
4544 else
4545 return 0;
4546 #endif /* not READ_SYSUAF */
4547 }
4548
4549 struct passwd *
4550 getpwuid (uid)
4551 unsigned long uid;
4552 {
4553 #ifdef READ_SYSUAF
4554 struct UAF * up;
4555
4556 if (!(up = get_uaf_uic (uid)))
4557 return 0;
4558 return cnv_uaf_pw (up);
4559 #else
4560 if (uid == sys_getuid ())
4561 return getpwnam (egetenv ("USER"));
4562 else
4563 return 0;
4564 #endif /* not READ_SYSUAF */
4565 }
4566
4567 /* return total address space available to the current process. This is
4568 the sum of the current p0 size, p1 size and free page table entries
4569 available. */
4570 vlimit ()
4571 {
4572 int item_code;
4573 unsigned long free_pages;
4574 unsigned long frep0va;
4575 unsigned long frep1va;
4576 register status;
4577
4578 item_code = JPI$_FREPTECNT;
4579 if (((status = LIB$GETJPI (&item_code, 0, 0, &free_pages)) & 1) == 0)
4580 {
4581 errno = EVMSERR;
4582 vaxc$errno = status;
4583 return -1;
4584 }
4585 free_pages *= 512;
4586
4587 item_code = JPI$_FREP0VA;
4588 if (((status = LIB$GETJPI (&item_code, 0, 0, &frep0va)) & 1) == 0)
4589 {
4590 errno = EVMSERR;
4591 vaxc$errno = status;
4592 return -1;
4593 }
4594 item_code = JPI$_FREP1VA;
4595 if (((status = LIB$GETJPI (&item_code, 0, 0, &frep1va)) & 1) == 0)
4596 {
4597 errno = EVMSERR;
4598 vaxc$errno = status;
4599 return -1;
4600 }
4601
4602 return free_pages + frep0va + (0x7fffffff - frep1va);
4603 }
4604
4605 define_logical_name (varname, string)
4606 char *varname;
4607 char *string;
4608 {
4609 struct dsc$descriptor_s strdsc =
4610 {strlen (string), DSC$K_DTYPE_T, DSC$K_CLASS_S, string};
4611 struct dsc$descriptor_s envdsc =
4612 {strlen (varname), DSC$K_DTYPE_T, DSC$K_CLASS_S, varname};
4613 struct dsc$descriptor_s lnmdsc =
4614 {7, DSC$K_DTYPE_T, DSC$K_CLASS_S, "LNM$JOB"};
4615
4616 return LIB$SET_LOGICAL (&envdsc, &strdsc, &lnmdsc, 0, 0);
4617 }
4618
4619 delete_logical_name (varname)
4620 char *varname;
4621 {
4622 struct dsc$descriptor_s envdsc =
4623 {strlen (varname), DSC$K_DTYPE_T, DSC$K_CLASS_S, varname};
4624 struct dsc$descriptor_s lnmdsc =
4625 {7, DSC$K_DTYPE_T, DSC$K_CLASS_S, "LNM$JOB"};
4626
4627 return LIB$DELETE_LOGICAL (&envdsc, &lnmdsc);
4628 }
4629
4630 ulimit ()
4631 {}
4632
4633 setpgrp ()
4634 {}
4635
4636 execvp ()
4637 {
4638 error ("execvp system call not implemented");
4639 }
4640
4641 int
4642 rename (from, to)
4643 char *from, *to;
4644 {
4645 int status;
4646 struct FAB from_fab = cc$rms_fab, to_fab = cc$rms_fab;
4647 struct NAM from_nam = cc$rms_nam, to_nam = cc$rms_nam;
4648 char from_esn[NAM$C_MAXRSS];
4649 char to_esn[NAM$C_MAXRSS];
4650
4651 from_fab.fab$l_fna = from;
4652 from_fab.fab$b_fns = strlen (from);
4653 from_fab.fab$l_nam = &from_nam;
4654 from_fab.fab$l_fop = FAB$M_NAM;
4655
4656 from_nam.nam$l_esa = from_esn;
4657 from_nam.nam$b_ess = sizeof from_esn;
4658
4659 to_fab.fab$l_fna = to;
4660 to_fab.fab$b_fns = strlen (to);
4661 to_fab.fab$l_nam = &to_nam;
4662 to_fab.fab$l_fop = FAB$M_NAM;
4663
4664 to_nam.nam$l_esa = to_esn;
4665 to_nam.nam$b_ess = sizeof to_esn;
4666
4667 status = SYS$RENAME (&from_fab, 0, 0, &to_fab);
4668
4669 if (status & 1)
4670 return 0;
4671 else
4672 {
4673 if (status == RMS$_DEV)
4674 errno = EXDEV;
4675 else
4676 errno = EVMSERR;
4677 vaxc$errno = status;
4678 return -1;
4679 }
4680 }
4681
4682 /* This function renames a file like `rename', but it strips
4683 the version number from the "to" filename, such that the "to" file is
4684 will always be a new version. It also sets the file protection once it is
4685 finished. The protection that we will use is stored in fab_final_pro,
4686 and was set when we did a creat_copy_attrs to create the file that we
4687 are renaming.
4688
4689 We could use the chmod function, but Eunichs uses 3 bits per user category
4690 to describe the protection, and VMS uses 4 (write and delete are separate
4691 bits). To maintain portability, the VMS implementation of `chmod' wires
4692 the W and D bits together. */
4693
4694
4695 static struct fibdef fib; /* We need this initialized to zero */
4696 char vms_file_written[NAM$C_MAXRSS];
4697
4698 int
4699 rename_sans_version (from,to)
4700 char *from, *to;
4701 {
4702 short int chan;
4703 int stat;
4704 short int iosb[4];
4705 int status;
4706 struct FAB to_fab = cc$rms_fab;
4707 struct NAM to_nam = cc$rms_nam;
4708 struct dsc$descriptor fib_d ={sizeof (fib),0,0,(char*) &fib};
4709 struct dsc$descriptor fib_attr[2]
4710 = {{sizeof (fab_final_pro),ATR$C_FPRO,0,(char*) &fab_final_pro},{0,0,0,0}};
4711 char to_esn[NAM$C_MAXRSS];
4712
4713 $DESCRIPTOR (disk,to_esn);
4714
4715 to_fab.fab$l_fna = to;
4716 to_fab.fab$b_fns = strlen (to);
4717 to_fab.fab$l_nam = &to_nam;
4718 to_fab.fab$l_fop = FAB$M_NAM;
4719
4720 to_nam.nam$l_esa = to_esn;
4721 to_nam.nam$b_ess = sizeof to_esn;
4722
4723 status = SYS$PARSE (&to_fab, 0, 0); /* figure out the full file name */
4724
4725 if (to_nam.nam$l_fnb && NAM$M_EXP_VER)
4726 *(to_nam.nam$l_ver) = '\0';
4727
4728 stat = rename (from, to_esn);
4729 if (stat < 0)
4730 return stat;
4731
4732 strcpy (vms_file_written, to_esn);
4733
4734 to_fab.fab$l_fna = vms_file_written; /* this points to the versionless name */
4735 to_fab.fab$b_fns = strlen (vms_file_written);
4736
4737 /* Now set the file protection to the correct value */
4738 SYS$OPEN (&to_fab, 0, 0); /* This fills in the nam$w_fid fields */
4739
4740 /* Copy these fields into the fib */
4741 fib.fib$r_fid_overlay.fib$w_fid[0] = to_nam.nam$w_fid[0];
4742 fib.fib$r_fid_overlay.fib$w_fid[1] = to_nam.nam$w_fid[1];
4743 fib.fib$r_fid_overlay.fib$w_fid[2] = to_nam.nam$w_fid[2];
4744
4745 SYS$CLOSE (&to_fab, 0, 0);
4746
4747 stat = SYS$ASSIGN (&disk, &chan, 0, 0); /* open a channel to the disk */
4748 if (!stat)
4749 LIB$SIGNAL (stat);
4750 stat = SYS$QIOW (0, chan, IO$_MODIFY, iosb, 0, 0, &fib_d,
4751 0, 0, 0, &fib_attr, 0);
4752 if (!stat)
4753 LIB$SIGNAL (stat);
4754 stat = SYS$DASSGN (chan);
4755 if (!stat)
4756 LIB$SIGNAL (stat);
4757 strcpy (vms_file_written, to_esn); /* We will write this to the terminal*/
4758 return 0;
4759 }
4760
4761 link (file, new)
4762 char * file, * new;
4763 {
4764 register status;
4765 struct FAB fab;
4766 struct NAM nam;
4767 unsigned short fid[3];
4768 char esa[NAM$C_MAXRSS];
4769
4770 fab = cc$rms_fab;
4771 fab.fab$l_fop = FAB$M_OFP;
4772 fab.fab$l_fna = file;
4773 fab.fab$b_fns = strlen (file);
4774 fab.fab$l_nam = &nam;
4775
4776 nam = cc$rms_nam;
4777 nam.nam$l_esa = esa;
4778 nam.nam$b_ess = NAM$C_MAXRSS;
4779
4780 status = SYS$PARSE (&fab);
4781 if ((status & 1) == 0)
4782 {
4783 errno = EVMSERR;
4784 vaxc$errno = status;
4785 return -1;
4786 }
4787 status = SYS$SEARCH (&fab);
4788 if ((status & 1) == 0)
4789 {
4790 errno = EVMSERR;
4791 vaxc$errno = status;
4792 return -1;
4793 }
4794
4795 fid[0] = nam.nam$w_fid[0];
4796 fid[1] = nam.nam$w_fid[1];
4797 fid[2] = nam.nam$w_fid[2];
4798
4799 fab.fab$l_fna = new;
4800 fab.fab$b_fns = strlen (new);
4801
4802 status = SYS$PARSE (&fab);
4803 if ((status & 1) == 0)
4804 {
4805 errno = EVMSERR;
4806 vaxc$errno = status;
4807 return -1;
4808 }
4809
4810 nam.nam$w_fid[0] = fid[0];
4811 nam.nam$w_fid[1] = fid[1];
4812 nam.nam$w_fid[2] = fid[2];
4813
4814 nam.nam$l_esa = nam.nam$l_name;
4815 nam.nam$b_esl = nam.nam$b_name + nam.nam$b_type + nam.nam$b_ver;
4816
4817 status = SYS$ENTER (&fab);
4818 if ((status & 1) == 0)
4819 {
4820 errno = EVMSERR;
4821 vaxc$errno = status;
4822 return -1;
4823 }
4824
4825 return 0;
4826 }
4827
4828 croak (badfunc)
4829 char *badfunc;
4830 {
4831 printf ("%s not yet implemented\r\n", badfunc);
4832 reset_sys_modes ();
4833 exit (1);
4834 }
4835
4836 long
4837 random ()
4838 {
4839 /* Arrange to return a range centered on zero. */
4840 return rand () - (1 << 30);
4841 }
4842
4843 srandom (seed)
4844 {
4845 srand (seed);
4846 }
4847 #endif /* VMS */
4848 \f
4849 #ifdef AIXHFT
4850
4851 /* Called from init_sys_modes. */
4852 hft_init ()
4853 {
4854 int junk;
4855
4856 /* If we're not on an HFT we shouldn't do any of this. We determine
4857 if we are on an HFT by trying to get an HFT error code. If this
4858 call fails, we're not on an HFT. */
4859 #ifdef IBMR2AIX
4860 if (ioctl (0, HFQERROR, &junk) < 0)
4861 return;
4862 #else /* not IBMR2AIX */
4863 if (ioctl (0, HFQEIO, 0) < 0)
4864 return;
4865 #endif /* not IBMR2AIX */
4866
4867 /* On AIX the default hft keyboard mapping uses backspace rather than delete
4868 as the rubout key's ASCII code. Here this is changed. The bug is that
4869 there's no way to determine the old mapping, so in reset_sys_modes
4870 we need to assume that the normal map had been present. Of course, this
4871 code also doesn't help if on a terminal emulator which doesn't understand
4872 HFT VTD's. */
4873 {
4874 struct hfbuf buf;
4875 struct hfkeymap keymap;
4876
4877 buf.hf_bufp = (char *)&keymap;
4878 buf.hf_buflen = sizeof (keymap);
4879 keymap.hf_nkeys = 2;
4880 keymap.hfkey[0].hf_kpos = 15;
4881 keymap.hfkey[0].hf_kstate = HFMAPCHAR | HFSHFNONE;
4882 #ifdef IBMR2AIX
4883 keymap.hfkey[0].hf_keyidh = '<';
4884 #else /* not IBMR2AIX */
4885 keymap.hfkey[0].hf_page = '<';
4886 #endif /* not IBMR2AIX */
4887 keymap.hfkey[0].hf_char = 127;
4888 keymap.hfkey[1].hf_kpos = 15;
4889 keymap.hfkey[1].hf_kstate = HFMAPCHAR | HFSHFSHFT;
4890 #ifdef IBMR2AIX
4891 keymap.hfkey[1].hf_keyidh = '<';
4892 #else /* not IBMR2AIX */
4893 keymap.hfkey[1].hf_page = '<';
4894 #endif /* not IBMR2AIX */
4895 keymap.hfkey[1].hf_char = 127;
4896 hftctl (0, HFSKBD, &buf);
4897 }
4898 /* The HFT system on AIX doesn't optimize for scrolling, so it's really ugly
4899 at times. */
4900 line_ins_del_ok = char_ins_del_ok = 0;
4901 }
4902
4903 /* Reset the rubout key to backspace. */
4904
4905 hft_reset ()
4906 {
4907 struct hfbuf buf;
4908 struct hfkeymap keymap;
4909 int junk;
4910
4911 #ifdef IBMR2AIX
4912 if (ioctl (0, HFQERROR, &junk) < 0)
4913 return;
4914 #else /* not IBMR2AIX */
4915 if (ioctl (0, HFQEIO, 0) < 0)
4916 return;
4917 #endif /* not IBMR2AIX */
4918
4919 buf.hf_bufp = (char *)&keymap;
4920 buf.hf_buflen = sizeof (keymap);
4921 keymap.hf_nkeys = 2;
4922 keymap.hfkey[0].hf_kpos = 15;
4923 keymap.hfkey[0].hf_kstate = HFMAPCHAR | HFSHFNONE;
4924 #ifdef IBMR2AIX
4925 keymap.hfkey[0].hf_keyidh = '<';
4926 #else /* not IBMR2AIX */
4927 keymap.hfkey[0].hf_page = '<';
4928 #endif /* not IBMR2AIX */
4929 keymap.hfkey[0].hf_char = 8;
4930 keymap.hfkey[1].hf_kpos = 15;
4931 keymap.hfkey[1].hf_kstate = HFMAPCHAR | HFSHFSHFT;
4932 #ifdef IBMR2AIX
4933 keymap.hfkey[1].hf_keyidh = '<';
4934 #else /* not IBMR2AIX */
4935 keymap.hfkey[1].hf_page = '<';
4936 #endif /* not IBMR2AIX */
4937 keymap.hfkey[1].hf_char = 8;
4938 hftctl (0, HFSKBD, &buf);
4939 }
4940
4941 #endif /* AIXHFT */
4942
4943 #ifdef USE_DL_STUBS
4944
4945 /* These are included on Sunos 4.1 when we do not use shared libraries.
4946 X11 libraries may refer to these functions but (we hope) do not
4947 actually call them. */
4948
4949 void *
4950 dlopen ()
4951 {
4952 return 0;
4953 }
4954
4955 void *
4956 dlsym ()
4957 {
4958 return 0;
4959 }
4960
4961 int
4962 dlclose ()
4963 {
4964 return -1;
4965 }
4966
4967 #endif /* USE_DL_STUBS */
4968 \f
4969 #ifndef BSTRING
4970
4971 #ifndef bzero
4972
4973 void
4974 bzero (b, length)
4975 register char *b;
4976 register int length;
4977 {
4978 #ifdef VMS
4979 short zero = 0;
4980 long max_str = 65535;
4981
4982 while (length > max_str) {
4983 (void) LIB$MOVC5 (&zero, &zero, &zero, &max_str, b);
4984 length -= max_str;
4985 b += max_str;
4986 }
4987 max_str = length;
4988 (void) LIB$MOVC5 (&zero, &zero, &zero, &max_str, b);
4989 #else
4990 while (length-- > 0)
4991 *b++ = 0;
4992 #endif /* not VMS */
4993 }
4994
4995 #endif /* no bzero */
4996 #endif /* BSTRING */
4997
4998 #if (defined (BSTRING) && !defined (bcopy)) || defined (NEED_BCOPY)
4999 #undef bcopy
5000
5001 /* Saying `void' requires a declaration, above, where bcopy is used
5002 and that declaration causes pain for systems where bcopy is a macro. */
5003 bcopy (b1, b2, length)
5004 register char *b1;
5005 register char *b2;
5006 register int length;
5007 {
5008 #ifdef VMS
5009 long max_str = 65535;
5010
5011 while (length > max_str) {
5012 (void) LIB$MOVC3 (&max_str, b1, b2);
5013 length -= max_str;
5014 b1 += max_str;
5015 b2 += max_str;
5016 }
5017 max_str = length;
5018 (void) LIB$MOVC3 (&length, b1, b2);
5019 #else
5020 while (length-- > 0)
5021 *b2++ = *b1++;
5022 #endif /* not VMS */
5023 }
5024 #endif /* (defined (BSTRING) && !defined (bcopy)) || defined (NEED_BCOPY) */
5025
5026 #ifdef BSTRING
5027 #ifndef bcmp
5028 int
5029 bcmp (b1, b2, length) /* This could be a macro! */
5030 register char *b1;
5031 register char *b2;
5032 register int length;
5033 {
5034 #ifdef VMS
5035 struct dsc$descriptor_s src1 = {length, DSC$K_DTYPE_T, DSC$K_CLASS_S, b1};
5036 struct dsc$descriptor_s src2 = {length, DSC$K_DTYPE_T, DSC$K_CLASS_S, b2};
5037
5038 return STR$COMPARE (&src1, &src2);
5039 #else
5040 while (length-- > 0)
5041 if (*b1++ != *b2++)
5042 return 1;
5043
5044 return 0;
5045 #endif /* not VMS */
5046 }
5047 #endif /* no bcmp */
5048 #endif /* not BSTRING */
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