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