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