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