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(read_input_waiting): Fix Lisp_Object vs. int problem.
[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 #if !defined (HAVE_SELECT) || defined (BROKEN_SELECT_NON_X)
2201
2202 #include "sysselect.h"
2203 #undef select
2204
2205 #if defined (HAVE_X_WINDOWS) && !defined (HAVE_SELECT)
2206 /* Cause explanatory error message at compile time,
2207 since the select emulation is not good enough for X. */
2208 int *x = &x_windows_lose_if_no_select_system_call;
2209 #endif
2210
2211 /* Emulate as much as select as is possible under 4.1 and needed by Gnu Emacs
2212 * Only checks read descriptors.
2213 */
2214 /* How long to wait between checking fds in select */
2215 #define SELECT_PAUSE 1
2216 int select_alarmed;
2217
2218 /* For longjmp'ing back to read_input_waiting. */
2219
2220 jmp_buf read_alarm_throw;
2221
2222 /* Nonzero if the alarm signal should throw back to read_input_waiting.
2223 The read_socket_hook function sets this to 1 while it is waiting. */
2224
2225 int read_alarm_should_throw;
2226
2227 SIGTYPE
2228 select_alarm ()
2229 {
2230 select_alarmed = 1;
2231 #ifdef BSD4_1
2232 sigrelse (SIGALRM);
2233 #else /* not BSD4_1 */
2234 signal (SIGALRM, SIG_IGN);
2235 #endif /* not BSD4_1 */
2236 if (read_alarm_should_throw)
2237 longjmp (read_alarm_throw, 1);
2238 }
2239
2240 #ifndef WINDOWSNT
2241 /* Only rfds are checked. */
2242 int
2243 sys_select (nfds, rfds, wfds, efds, timeout)
2244 int nfds;
2245 SELECT_TYPE *rfds, *wfds, *efds;
2246 EMACS_TIME *timeout;
2247 {
2248 int ravail = 0, old_alarm;
2249 SELECT_TYPE orfds;
2250 int timeoutval;
2251 int *local_timeout;
2252 extern int proc_buffered_char[];
2253 #ifndef subprocesses
2254 int process_tick = 0, update_tick = 0;
2255 #else
2256 extern int process_tick, update_tick;
2257 #endif
2258 SIGTYPE (*old_trap) ();
2259 unsigned char buf;
2260
2261 #if defined (HAVE_SELECT) && defined (HAVE_X_WINDOWS)
2262 /* If we're using X, then the native select will work; we only need the
2263 emulation for non-X usage. */
2264 if (!NILP (Vwindow_system))
2265 return select (nfds, rfds, wfds, efds, timeout);
2266 #endif
2267 timeoutval = timeout ? EMACS_SECS (*timeout) : 100000;
2268 local_timeout = &timeoutval;
2269 FD_ZERO (&orfds);
2270 if (rfds)
2271 {
2272 orfds = *rfds;
2273 FD_ZERO (rfds);
2274 }
2275 if (wfds)
2276 FD_ZERO (wfds);
2277 if (efds)
2278 FD_ZERO (efds);
2279
2280 /* If we are looking only for the terminal, with no timeout,
2281 just read it and wait -- that's more efficient. */
2282 if (*local_timeout == 100000 && process_tick == update_tick
2283 && FD_ISSET (0, &orfds))
2284 {
2285 int fd;
2286 for (fd = 1; fd < nfds; ++fd)
2287 if (FD_ISSET (fd, &orfds))
2288 goto hardway;
2289 if (! detect_input_pending ())
2290 read_input_waiting ();
2291 FD_SET (0, rfds);
2292 return 1;
2293 }
2294
2295 hardway:
2296 /* Once a second, till the timer expires, check all the flagged read
2297 * descriptors to see if any input is available. If there is some then
2298 * set the corresponding bit in the return copy of rfds.
2299 */
2300 while (1)
2301 {
2302 register int to_check, fd;
2303
2304 if (rfds)
2305 {
2306 for (to_check = nfds, fd = 0; --to_check >= 0; fd++)
2307 {
2308 if (FD_ISSET (fd, &orfds))
2309 {
2310 int avail = 0, status = 0;
2311
2312 if (fd == 0)
2313 avail = detect_input_pending (); /* Special keyboard handler */
2314 else
2315 {
2316 #ifdef FIONREAD
2317 status = ioctl (fd, FIONREAD, &avail);
2318 #else /* no FIONREAD */
2319 #ifdef MSDOS
2320 abort (); /* I don't think we need it. */
2321 #else /* not MSDOS */
2322 /* Hoping it will return -1 if nothing available
2323 or 0 if all 0 chars requested are read. */
2324 if (proc_buffered_char[fd] >= 0)
2325 avail = 1;
2326 else
2327 {
2328 avail = read (fd, &buf, 1);
2329 if (avail > 0)
2330 proc_buffered_char[fd] = buf;
2331 }
2332 #endif /* not MSDOS */
2333 #endif /* no FIONREAD */
2334 }
2335 if (status >= 0 && avail > 0)
2336 {
2337 FD_SET (fd, rfds);
2338 ravail++;
2339 }
2340 }
2341 }
2342 }
2343 if (*local_timeout == 0 || ravail != 0 || process_tick != update_tick)
2344 break;
2345 old_alarm = alarm (0);
2346 old_trap = signal (SIGALRM, select_alarm);
2347 select_alarmed = 0;
2348 alarm (SELECT_PAUSE);
2349 /* Wait for a SIGALRM (or maybe a SIGTINT) */
2350 while (select_alarmed == 0 && *local_timeout != 0
2351 && process_tick == update_tick)
2352 {
2353 #ifdef MSDOS
2354 sleep_or_kbd_hit (SELECT_PAUSE, FD_ISSET (0, &orfds) != 0);
2355 select_alarm ();
2356 #else /* not MSDOS */
2357 /* If we are interested in terminal input,
2358 wait by reading the terminal.
2359 That makes instant wakeup for terminal input at least. */
2360 if (FD_ISSET (0, &orfds))
2361 {
2362 read_input_waiting ();
2363 if (detect_input_pending ())
2364 select_alarmed = 1;
2365 }
2366 else
2367 pause ();
2368 #endif /* not MSDOS */
2369 }
2370 (*local_timeout) -= SELECT_PAUSE;
2371 /* Reset the old alarm if there was one */
2372 alarm (0);
2373 signal (SIGALRM, old_trap);
2374 if (old_alarm != 0)
2375 {
2376 /* Reset or forge an interrupt for the original handler. */
2377 old_alarm -= SELECT_PAUSE;
2378 if (old_alarm <= 0)
2379 kill (getpid (), SIGALRM); /* Fake an alarm with the orig' handler */
2380 else
2381 alarm (old_alarm);
2382 }
2383 if (*local_timeout == 0) /* Stop on timer being cleared */
2384 break;
2385 }
2386 return ravail;
2387 }
2388 #endif /* not WINDOWSNT */
2389
2390 /* Read keyboard input into the standard buffer,
2391 waiting for at least one character. */
2392
2393 /* Make all keyboard buffers much bigger when using X windows. */
2394 #ifdef HAVE_X_WINDOWS
2395 #define BUFFER_SIZE_FACTOR 16
2396 #else
2397 #define BUFFER_SIZE_FACTOR 1
2398 #endif
2399
2400 read_input_waiting ()
2401 {
2402 struct input_event e;
2403 int nread, i;
2404 extern int quit_char;
2405
2406 if (read_socket_hook)
2407 {
2408 struct input_event buf[256];
2409
2410 read_alarm_should_throw = 0;
2411 if (! setjmp (read_alarm_throw))
2412 nread = (*read_socket_hook) (0, buf, 256, 1, 0);
2413 else
2414 nread = -1;
2415
2416 /* Scan the chars for C-g and store them in kbd_buffer. */
2417 for (i = 0; i < nread; i++)
2418 {
2419 kbd_buffer_store_event (&buf[i]);
2420 /* Don't look at input that follows a C-g too closely.
2421 This reduces lossage due to autorepeat on C-g. */
2422 if (buf[i].kind == ascii_keystroke
2423 && buf[i].code == quit_char)
2424 break;
2425 }
2426 }
2427 else
2428 {
2429 char buf[3];
2430 nread = read (fileno (stdin), buf, 1);
2431
2432 /* Scan the chars for C-g and store them in kbd_buffer. */
2433 e.kind = ascii_keystroke;
2434 XSETFRAME (e.frame_or_window, selected_frame);
2435 e.modifiers = 0;
2436 for (i = 0; i < nread; i++)
2437 {
2438 /* Convert chars > 0177 to meta events if desired.
2439 We do this under the same conditions that read_avail_input does. */
2440 if (read_socket_hook == 0)
2441 {
2442 /* If the user says she has a meta key, then believe her. */
2443 if (meta_key == 1 && (buf[i] & 0x80))
2444 e.modifiers = meta_modifier;
2445 if (meta_key != 2)
2446 buf[i] &= ~0x80;
2447 }
2448
2449 XSETINT (e.code, buf[i]);
2450 kbd_buffer_store_event (&e);
2451 /* Don't look at input that follows a C-g too closely.
2452 This reduces lossage due to autorepeat on C-g. */
2453 if (buf[i] == quit_char)
2454 break;
2455 }
2456 }
2457 }
2458
2459 #endif /* not HAVE_SELECT */
2460 #endif /* not VMS */
2461 \f
2462 #ifdef BSD4_1
2463 /*
2464 * Partially emulate 4.2 open call.
2465 * open is defined as this in 4.1.
2466 *
2467 * - added by Michael Bloom @ Citicorp/TTI
2468 *
2469 */
2470
2471 int
2472 sys_open (path, oflag, mode)
2473 char *path;
2474 int oflag, mode;
2475 {
2476 if (oflag & O_CREAT)
2477 return creat (path, mode);
2478 else
2479 return open (path, oflag);
2480 }
2481
2482 init_sigio (fd)
2483 int fd;
2484 {
2485 if (noninteractive)
2486 return;
2487 lmode = LINTRUP | lmode;
2488 ioctl (fd, TIOCLSET, &lmode);
2489 }
2490
2491 reset_sigio ()
2492 {
2493 if (noninteractive)
2494 return;
2495 lmode = ~LINTRUP & lmode;
2496 ioctl (0, TIOCLSET, &lmode);
2497 }
2498
2499 request_sigio ()
2500 {
2501 sigrelse (SIGTINT);
2502
2503 interrupts_deferred = 0;
2504 }
2505
2506 unrequest_sigio ()
2507 {
2508 sighold (SIGTINT);
2509
2510 interrupts_deferred = 1;
2511 }
2512
2513 /* still inside #ifdef BSD4_1 */
2514 #ifdef subprocesses
2515
2516 int sigheld; /* Mask of held signals */
2517
2518 sigholdx (signum)
2519 int signum;
2520 {
2521 sigheld |= sigbit (signum);
2522 sighold (signum);
2523 }
2524
2525 sigisheld (signum)
2526 int signum;
2527 {
2528 sigheld |= sigbit (signum);
2529 }
2530
2531 sigunhold (signum)
2532 int signum;
2533 {
2534 sigheld &= ~sigbit (signum);
2535 sigrelse (signum);
2536 }
2537
2538 sigfree () /* Free all held signals */
2539 {
2540 int i;
2541 for (i = 0; i < NSIG; i++)
2542 if (sigheld & sigbit (i))
2543 sigrelse (i);
2544 sigheld = 0;
2545 }
2546
2547 sigbit (i)
2548 {
2549 return 1 << (i - 1);
2550 }
2551 #endif /* subprocesses */
2552 #endif /* BSD4_1 */
2553 \f
2554 /* POSIX signals support - DJB */
2555 /* Anyone with POSIX signals should have ANSI C declarations */
2556
2557 #ifdef POSIX_SIGNALS
2558
2559 sigset_t old_mask, empty_mask, full_mask, temp_mask;
2560 static struct sigaction new_action, old_action;
2561
2562 init_signals ()
2563 {
2564 sigemptyset (&empty_mask);
2565 sigfillset (&full_mask);
2566 }
2567
2568 signal_handler_t
2569 sys_signal (int signal_number, signal_handler_t action)
2570 {
2571 #ifdef DGUX
2572 /* This gets us restartable system calls for efficiency.
2573 The "else" code will works as well. */
2574 return (berk_signal (signal_number, action));
2575 #else
2576 sigemptyset (&new_action.sa_mask);
2577 new_action.sa_handler = action;
2578 #ifdef SA_RESTART
2579 /* Emacs mostly works better with restartable system services. If this
2580 * flag exists, we probably want to turn it on here.
2581 */
2582 new_action.sa_flags = SA_RESTART;
2583 #else
2584 new_action.sa_flags = 0;
2585 #endif
2586 sigaction (signal_number, &new_action, &old_action);
2587 return (old_action.sa_handler);
2588 #endif /* DGUX */
2589 }
2590
2591 #ifndef __GNUC__
2592 /* If we're compiling with GCC, we don't need this function, since it
2593 can be written as a macro. */
2594 sigset_t
2595 sys_sigmask (int sig)
2596 {
2597 sigset_t mask;
2598 sigemptyset (&mask);
2599 sigaddset (&mask, sig);
2600 return mask;
2601 }
2602 #endif
2603
2604 int
2605 sys_sigpause (sigset_t new_mask)
2606 {
2607 /* pause emulating berk sigpause... */
2608 sigsuspend (&new_mask);
2609 return (EINTR);
2610 }
2611
2612 /* I'd like to have these guys return pointers to the mask storage in here,
2613 but there'd be trouble if the code was saving multiple masks. I'll be
2614 safe and pass the structure. It normally won't be more than 2 bytes
2615 anyhow. - DJB */
2616
2617 sigset_t
2618 sys_sigblock (sigset_t new_mask)
2619 {
2620 sigset_t old_mask;
2621 sigprocmask (SIG_BLOCK, &new_mask, &old_mask);
2622 return (old_mask);
2623 }
2624
2625 sigset_t
2626 sys_sigunblock (sigset_t new_mask)
2627 {
2628 sigset_t old_mask;
2629 sigprocmask (SIG_UNBLOCK, &new_mask, &old_mask);
2630 return (old_mask);
2631 }
2632
2633 sigset_t
2634 sys_sigsetmask (sigset_t new_mask)
2635 {
2636 sigset_t old_mask;
2637 sigprocmask (SIG_SETMASK, &new_mask, &old_mask);
2638 return (old_mask);
2639 }
2640
2641 #endif /* POSIX_SIGNALS */
2642 \f
2643 #ifndef BSTRING
2644
2645 #ifndef bzero
2646
2647 void
2648 bzero (b, length)
2649 register char *b;
2650 register int length;
2651 {
2652 #ifdef VMS
2653 short zero = 0;
2654 long max_str = 65535;
2655
2656 while (length > max_str) {
2657 (void) LIB$MOVC5 (&zero, &zero, &zero, &max_str, b);
2658 length -= max_str;
2659 b += max_str;
2660 }
2661 max_str = length;
2662 (void) LIB$MOVC5 (&zero, &zero, &zero, &max_str, b);
2663 #else
2664 while (length-- > 0)
2665 *b++ = 0;
2666 #endif /* not VMS */
2667 }
2668
2669 #endif /* no bzero */
2670
2671 #ifndef bcopy
2672 /* Saying `void' requires a declaration, above, where bcopy is used
2673 and that declaration causes pain for systems where bcopy is a macro. */
2674 bcopy (b1, b2, length)
2675 register char *b1;
2676 register char *b2;
2677 register int length;
2678 {
2679 #ifdef VMS
2680 long max_str = 65535;
2681
2682 while (length > max_str) {
2683 (void) LIB$MOVC3 (&max_str, b1, b2);
2684 length -= max_str;
2685 b1 += max_str;
2686 b2 += max_str;
2687 }
2688 max_str = length;
2689 (void) LIB$MOVC3 (&length, b1, b2);
2690 #else
2691 while (length-- > 0)
2692 *b2++ = *b1++;
2693 #endif /* not VMS */
2694 }
2695 #endif /* no bcopy */
2696
2697 #ifndef bcmp
2698 int
2699 bcmp (b1, b2, length) /* This could be a macro! */
2700 register char *b1;
2701 register char *b2;
2702 register int length;
2703 {
2704 #ifdef VMS
2705 struct dsc$descriptor_s src1 = {length, DSC$K_DTYPE_T, DSC$K_CLASS_S, b1};
2706 struct dsc$descriptor_s src2 = {length, DSC$K_DTYPE_T, DSC$K_CLASS_S, b2};
2707
2708 return STR$COMPARE (&src1, &src2);
2709 #else
2710 while (length-- > 0)
2711 if (*b1++ != *b2++)
2712 return 1;
2713
2714 return 0;
2715 #endif /* not VMS */
2716 }
2717 #endif /* no bcmp */
2718
2719 #endif /* not BSTRING */
2720 \f
2721 #ifndef HAVE_RANDOM
2722 #ifdef random
2723 #define HAVE_RANDOM
2724 #endif
2725 #endif
2726
2727 /* Figure out how many bits the system's random number generator uses.
2728 `random' and `lrand48' are assumed to return 31 usable bits.
2729 BSD `rand' returns a 31 bit value but the low order bits are unusable;
2730 so we'll shift it and treat it like the 15-bit USG `rand'. */
2731
2732 #ifndef RAND_BITS
2733 # ifdef HAVE_RANDOM
2734 # define RAND_BITS 31
2735 # else /* !HAVE_RANDOM */
2736 # ifdef HAVE_LRAND48
2737 # define RAND_BITS 31
2738 # define random lrand48
2739 # else /* !HAVE_LRAND48 */
2740 # define RAND_BITS 15
2741 # if RAND_MAX == 32767
2742 # define random rand
2743 # else /* RAND_MAX != 32767 */
2744 # if RAND_MAX == 2147483647
2745 # define random() (rand () >> 16)
2746 # else /* RAND_MAX != 2147483647 */
2747 # ifdef USG
2748 # define random rand
2749 # else
2750 # define random() (rand () >> 16)
2751 # endif /* !BSD */
2752 # endif /* RAND_MAX != 2147483647 */
2753 # endif /* RAND_MAX != 32767 */
2754 # endif /* !HAVE_LRAND48 */
2755 # endif /* !HAVE_RANDOM */
2756 #endif /* !RAND_BITS */
2757
2758 void
2759 seed_random (arg)
2760 long arg;
2761 {
2762 #ifdef HAVE_RANDOM
2763 srandom ((unsigned int)arg);
2764 #else
2765 # ifdef HAVE_LRAND48
2766 srand48 (arg);
2767 # else
2768 srand ((unsigned int)arg);
2769 # endif
2770 #endif
2771 }
2772
2773 /*
2774 * Build a full Emacs-sized word out of whatever we've got.
2775 * This suffices even for a 64-bit architecture with a 15-bit rand.
2776 */
2777 long
2778 get_random ()
2779 {
2780 long val = random ();
2781 #if VALBITS > RAND_BITS
2782 val = (val << RAND_BITS) ^ random ();
2783 #if VALBITS > 2*RAND_BITS
2784 val = (val << RAND_BITS) ^ random ();
2785 #if VALBITS > 3*RAND_BITS
2786 val = (val << RAND_BITS) ^ random ();
2787 #if VALBITS > 4*RAND_BITS
2788 val = (val << RAND_BITS) ^ random ();
2789 #endif /* need at least 5 */
2790 #endif /* need at least 4 */
2791 #endif /* need at least 3 */
2792 #endif /* need at least 2 */
2793 return val & ((1L << VALBITS) - 1);
2794 }
2795 \f
2796 #ifdef WRONG_NAME_INSQUE
2797
2798 insque (q,p)
2799 caddr_t q,p;
2800 {
2801 _insque (q,p);
2802 }
2803
2804 #endif
2805 \f
2806 #ifdef VMS
2807
2808 #ifdef getenv
2809 /* If any place else asks for the TERM variable,
2810 allow it to be overridden with the EMACS_TERM variable
2811 before attempting to translate the logical name TERM. As a last
2812 resort, ask for VAX C's special idea of the TERM variable. */
2813 #undef getenv
2814 char *
2815 sys_getenv (name)
2816 char *name;
2817 {
2818 register char *val;
2819 static char buf[256];
2820 static struct dsc$descriptor_s equiv
2821 = {sizeof (buf), DSC$K_DTYPE_T, DSC$K_CLASS_S, buf};
2822 static struct dsc$descriptor_s d_name
2823 = {0, DSC$K_DTYPE_T, DSC$K_CLASS_S, 0};
2824 short eqlen;
2825
2826 if (!strcmp (name, "TERM"))
2827 {
2828 val = (char *) getenv ("EMACS_TERM");
2829 if (val)
2830 return val;
2831 }
2832
2833 d_name.dsc$w_length = strlen (name);
2834 d_name.dsc$a_pointer = name;
2835 if (LIB$SYS_TRNLOG (&d_name, &eqlen, &equiv) == 1)
2836 {
2837 char *str = (char *) xmalloc (eqlen + 1);
2838 bcopy (buf, str, eqlen);
2839 str[eqlen] = '\0';
2840 /* This is a storage leak, but a pain to fix. With luck,
2841 no one will ever notice. */
2842 return str;
2843 }
2844 return (char *) getenv (name);
2845 }
2846 #endif /* getenv */
2847
2848 #ifdef abort
2849 /* Since VMS doesn't believe in core dumps, the only way to debug this beast is
2850 to force a call on the debugger from within the image. */
2851 #undef abort
2852 sys_abort ()
2853 {
2854 reset_sys_modes ();
2855 LIB$SIGNAL (SS$_DEBUG);
2856 }
2857 #endif /* abort */
2858 #endif /* VMS */
2859 \f
2860 #ifdef VMS
2861 #ifdef LINK_CRTL_SHARE
2862 #ifdef SHAREABLE_LIB_BUG
2863 /* Variables declared noshare and initialized in sharable libraries
2864 cannot be shared. The VMS linker incorrectly forces you to use a private
2865 version which is uninitialized... If not for this "feature", we
2866 could use the C library definition of sys_nerr and sys_errlist. */
2867 int sys_nerr = 35;
2868 char *sys_errlist[] =
2869 {
2870 "error 0",
2871 "not owner",
2872 "no such file or directory",
2873 "no such process",
2874 "interrupted system call",
2875 "i/o error",
2876 "no such device or address",
2877 "argument list too long",
2878 "exec format error",
2879 "bad file number",
2880 "no child process",
2881 "no more processes",
2882 "not enough memory",
2883 "permission denied",
2884 "bad address",
2885 "block device required",
2886 "mount devices busy",
2887 "file exists",
2888 "cross-device link",
2889 "no such device",
2890 "not a directory",
2891 "is a directory",
2892 "invalid argument",
2893 "file table overflow",
2894 "too many open files",
2895 "not a typewriter",
2896 "text file busy",
2897 "file too big",
2898 "no space left on device",
2899 "illegal seek",
2900 "read-only file system",
2901 "too many links",
2902 "broken pipe",
2903 "math argument",
2904 "result too large",
2905 "I/O stream empty",
2906 "vax/vms specific error code nontranslatable error"
2907 };
2908 #endif /* SHAREABLE_LIB_BUG */
2909 #endif /* LINK_CRTL_SHARE */
2910 #endif /* VMS */
2911
2912 #ifndef HAVE_STRERROR
2913 #ifndef WINDOWSNT
2914 char *
2915 strerror (errnum)
2916 int errnum;
2917 {
2918 extern char *sys_errlist[];
2919 extern int sys_nerr;
2920
2921 if (errnum >= 0 && errnum < sys_nerr)
2922 return sys_errlist[errnum];
2923 return (char *) "Unknown error";
2924 }
2925 #endif /* not WINDOWSNT */
2926 #endif /* ! HAVE_STRERROR */
2927 \f
2928 #ifdef INTERRUPTIBLE_OPEN
2929
2930 int
2931 /* VARARGS 2 */
2932 sys_open (path, oflag, mode)
2933 char *path;
2934 int oflag, mode;
2935 {
2936 register int rtnval;
2937
2938 while ((rtnval = open (path, oflag, mode)) == -1
2939 && (errno == EINTR));
2940 return (rtnval);
2941 }
2942
2943 #endif /* INTERRUPTIBLE_OPEN */
2944
2945 #ifdef INTERRUPTIBLE_CLOSE
2946
2947 sys_close (fd)
2948 int fd;
2949 {
2950 register int rtnval;
2951
2952 while ((rtnval = close (fd)) == -1
2953 && (errno == EINTR));
2954 return rtnval;
2955 }
2956
2957 #endif /* INTERRUPTIBLE_CLOSE */
2958
2959 #ifdef INTERRUPTIBLE_IO
2960
2961 int
2962 sys_read (fildes, buf, nbyte)
2963 int fildes;
2964 char *buf;
2965 unsigned int nbyte;
2966 {
2967 register int rtnval;
2968
2969 while ((rtnval = read (fildes, buf, nbyte)) == -1
2970 && (errno == EINTR));
2971 return (rtnval);
2972 }
2973
2974 int
2975 sys_write (fildes, buf, nbyte)
2976 int fildes;
2977 char *buf;
2978 unsigned int nbyte;
2979 {
2980 register int rtnval, bytes_written;
2981
2982 bytes_written = 0;
2983
2984 while (nbyte > 0)
2985 {
2986 rtnval = write (fildes, buf, nbyte);
2987
2988 if (rtnval == -1)
2989 {
2990 if (errno == EINTR)
2991 continue;
2992 else
2993 return (bytes_written ? bytes_written : -1);
2994 }
2995
2996 buf += rtnval;
2997 nbyte -= rtnval;
2998 bytes_written += rtnval;
2999 }
3000 return (bytes_written);
3001 }
3002
3003 #endif /* INTERRUPTIBLE_IO */
3004 \f
3005 #ifndef HAVE_VFORK
3006 #ifndef WINDOWSNT
3007 /*
3008 * Substitute fork for vfork on USG flavors.
3009 */
3010
3011 vfork ()
3012 {
3013 return (fork ());
3014 }
3015 #endif /* not WINDOWSNT */
3016 #endif /* not HAVE_VFORK */
3017 \f
3018 #ifdef USG
3019 /*
3020 * All of the following are for USG.
3021 *
3022 * On USG systems the system calls are INTERRUPTIBLE by signals
3023 * that the user program has elected to catch. Thus the system call
3024 * must be retried in these cases. To handle this without massive
3025 * changes in the source code, we remap the standard system call names
3026 * to names for our own functions in sysdep.c that do the system call
3027 * with retries. Actually, for portability reasons, it is good
3028 * programming practice, as this example shows, to limit all actual
3029 * system calls to a single occurrence in the source. Sure, this
3030 * adds an extra level of function call overhead but it is almost
3031 * always negligible. Fred Fish, Unisoft Systems Inc.
3032 */
3033
3034 #ifndef HAVE_SYS_SIGLIST
3035 char *sys_siglist[NSIG + 1] =
3036 {
3037 #ifdef AIX
3038 /* AIX has changed the signals a bit */
3039 "bogus signal", /* 0 */
3040 "hangup", /* 1 SIGHUP */
3041 "interrupt", /* 2 SIGINT */
3042 "quit", /* 3 SIGQUIT */
3043 "illegal instruction", /* 4 SIGILL */
3044 "trace trap", /* 5 SIGTRAP */
3045 "IOT instruction", /* 6 SIGIOT */
3046 "crash likely", /* 7 SIGDANGER */
3047 "floating point exception", /* 8 SIGFPE */
3048 "kill", /* 9 SIGKILL */
3049 "bus error", /* 10 SIGBUS */
3050 "segmentation violation", /* 11 SIGSEGV */
3051 "bad argument to system call", /* 12 SIGSYS */
3052 "write on a pipe with no one to read it", /* 13 SIGPIPE */
3053 "alarm clock", /* 14 SIGALRM */
3054 "software termination signum", /* 15 SIGTERM */
3055 "user defined signal 1", /* 16 SIGUSR1 */
3056 "user defined signal 2", /* 17 SIGUSR2 */
3057 "death of a child", /* 18 SIGCLD */
3058 "power-fail restart", /* 19 SIGPWR */
3059 "bogus signal", /* 20 */
3060 "bogus signal", /* 21 */
3061 "bogus signal", /* 22 */
3062 "bogus signal", /* 23 */
3063 "bogus signal", /* 24 */
3064 "LAN I/O interrupt", /* 25 SIGAIO */
3065 "PTY I/O interrupt", /* 26 SIGPTY */
3066 "I/O intervention required", /* 27 SIGIOINT */
3067 #ifdef AIXHFT
3068 "HFT grant", /* 28 SIGGRANT */
3069 "HFT retract", /* 29 SIGRETRACT */
3070 "HFT sound done", /* 30 SIGSOUND */
3071 "HFT input ready", /* 31 SIGMSG */
3072 #endif
3073 #else /* not AIX */
3074 "bogus signal", /* 0 */
3075 "hangup", /* 1 SIGHUP */
3076 "interrupt", /* 2 SIGINT */
3077 "quit", /* 3 SIGQUIT */
3078 "illegal instruction", /* 4 SIGILL */
3079 "trace trap", /* 5 SIGTRAP */
3080 "IOT instruction", /* 6 SIGIOT */
3081 "EMT instruction", /* 7 SIGEMT */
3082 "floating point exception", /* 8 SIGFPE */
3083 "kill", /* 9 SIGKILL */
3084 "bus error", /* 10 SIGBUS */
3085 "segmentation violation", /* 11 SIGSEGV */
3086 "bad argument to system call", /* 12 SIGSYS */
3087 "write on a pipe with no one to read it", /* 13 SIGPIPE */
3088 "alarm clock", /* 14 SIGALRM */
3089 "software termination signum", /* 15 SIGTERM */
3090 "user defined signal 1", /* 16 SIGUSR1 */
3091 "user defined signal 2", /* 17 SIGUSR2 */
3092 "death of a child", /* 18 SIGCLD */
3093 "power-fail restart", /* 19 SIGPWR */
3094 #ifdef sun
3095 "window size change", /* 20 SIGWINCH */
3096 "urgent socket condition", /* 21 SIGURG */
3097 "pollable event occured", /* 22 SIGPOLL */
3098 "stop (cannot be caught or ignored)", /* 23 SIGSTOP */
3099 "user stop requested from tty", /* 24 SIGTSTP */
3100 "stopped process has been continued", /* 25 SIGCONT */
3101 "background tty read attempted", /* 26 SIGTTIN */
3102 "background tty write attempted", /* 27 SIGTTOU */
3103 "virtual timer expired", /* 28 SIGVTALRM */
3104 "profiling timer expired", /* 29 SIGPROF */
3105 "exceeded cpu limit", /* 30 SIGXCPU */
3106 "exceeded file size limit", /* 31 SIGXFSZ */
3107 "process's lwps are blocked", /* 32 SIGWAITING */
3108 "special signal used by thread library", /* 33 SIGLWP */
3109 #ifdef SIGFREEZE
3110 "Special Signal Used By CPR", /* 34 SIGFREEZE */
3111 #endif
3112 #ifdef SIGTHAW
3113 "Special Signal Used By CPR", /* 35 SIGTHAW */
3114 #endif
3115 #endif /* sun */
3116 #endif /* not AIX */
3117 0
3118 };
3119 #endif /* HAVE_SYS_SIGLIST */
3120
3121 /*
3122 * Warning, this function may not duplicate 4.2 action properly
3123 * under error conditions.
3124 */
3125
3126 #ifndef MAXPATHLEN
3127 /* In 4.1, param.h fails to define this. */
3128 #define MAXPATHLEN 1024
3129 #endif
3130
3131 #ifndef HAVE_GETWD
3132
3133 char *
3134 getwd (pathname)
3135 char *pathname;
3136 {
3137 char *npath, *spath;
3138 extern char *getcwd ();
3139
3140 BLOCK_INPUT; /* getcwd uses malloc */
3141 spath = npath = getcwd ((char *) 0, MAXPATHLEN);
3142 if (spath == 0)
3143 return spath;
3144 /* On Altos 3068, getcwd can return @hostname/dir, so discard
3145 up to first slash. Should be harmless on other systems. */
3146 while (*npath && *npath != '/')
3147 npath++;
3148 strcpy (pathname, npath);
3149 free (spath); /* getcwd uses malloc */
3150 UNBLOCK_INPUT;
3151 return pathname;
3152 }
3153
3154 #endif /* HAVE_GETWD */
3155
3156 /*
3157 * Emulate rename using unlink/link. Note that this is
3158 * only partially correct. Also, doesn't enforce restriction
3159 * that files be of same type (regular->regular, dir->dir, etc).
3160 */
3161
3162 #ifndef HAVE_RENAME
3163
3164 rename (from, to)
3165 const char *from;
3166 const char *to;
3167 {
3168 if (access (from, 0) == 0)
3169 {
3170 unlink (to);
3171 if (link (from, to) == 0)
3172 if (unlink (from) == 0)
3173 return (0);
3174 }
3175 return (-1);
3176 }
3177
3178 #endif
3179
3180
3181 #ifdef HPUX
3182 #ifndef HAVE_PERROR
3183
3184 /* HPUX curses library references perror, but as far as we know
3185 it won't be called. Anyway this definition will do for now. */
3186
3187 perror ()
3188 {
3189 }
3190
3191 #endif /* not HAVE_PERROR */
3192 #endif /* HPUX */
3193
3194 #ifndef HAVE_DUP2
3195
3196 /*
3197 * Emulate BSD dup2. First close newd if it already exists.
3198 * Then, attempt to dup oldd. If not successful, call dup2 recursively
3199 * until we are, then close the unsuccessful ones.
3200 */
3201
3202 dup2 (oldd, newd)
3203 int oldd;
3204 int newd;
3205 {
3206 register int fd, ret;
3207
3208 sys_close (newd);
3209
3210 #ifdef F_DUPFD
3211 fd = fcntl (oldd, F_DUPFD, newd);
3212 if (fd != newd)
3213 error ("can't dup2 (%i,%i) : %s", oldd, newd, strerror (errno));
3214 #else
3215 fd = dup (old);
3216 if (fd == -1)
3217 return -1;
3218 if (fd == new)
3219 return new;
3220 ret = dup2 (old,new);
3221 sys_close (fd);
3222 return ret;
3223 #endif
3224 }
3225
3226 #endif /* not HAVE_DUP2 */
3227
3228 /*
3229 * Gettimeofday. Simulate as much as possible. Only accurate
3230 * to nearest second. Emacs doesn't use tzp so ignore it for now.
3231 * Only needed when subprocesses are defined.
3232 */
3233
3234 #ifdef subprocesses
3235 #ifndef VMS
3236 #ifndef HAVE_GETTIMEOFDAY
3237 #ifdef HAVE_TIMEVAL
3238
3239 /* ARGSUSED */
3240 gettimeofday (tp, tzp)
3241 struct timeval *tp;
3242 struct timezone *tzp;
3243 {
3244 extern long time ();
3245
3246 tp->tv_sec = time ((long *)0);
3247 tp->tv_usec = 0;
3248 if (tzp != 0)
3249 tzp->tz_minuteswest = -1;
3250 }
3251
3252 #endif
3253 #endif
3254 #endif
3255 #endif /* subprocess && !HAVE_GETTIMEOFDAY && HAVE_TIMEVAL && !VMS */
3256
3257 /*
3258 * This function will go away as soon as all the stubs fixed. (fnf)
3259 */
3260
3261 croak (badfunc)
3262 char *badfunc;
3263 {
3264 printf ("%s not yet implemented\r\n", badfunc);
3265 reset_sys_modes ();
3266 exit (1);
3267 }
3268
3269 #endif /* USG */
3270 \f
3271 #ifdef DGUX
3272
3273 char *sys_siglist[NSIG + 1] =
3274 {
3275 "null signal", /* 0 SIGNULL */
3276 "hangup", /* 1 SIGHUP */
3277 "interrupt", /* 2 SIGINT */
3278 "quit", /* 3 SIGQUIT */
3279 "illegal instruction", /* 4 SIGILL */
3280 "trace trap", /* 5 SIGTRAP */
3281 "abort termination", /* 6 SIGABRT */
3282 "SIGEMT", /* 7 SIGEMT */
3283 "floating point exception", /* 8 SIGFPE */
3284 "kill", /* 9 SIGKILL */
3285 "bus error", /* 10 SIGBUS */
3286 "segmentation violation", /* 11 SIGSEGV */
3287 "bad argument to system call", /* 12 SIGSYS */
3288 "write on a pipe with no reader", /* 13 SIGPIPE */
3289 "alarm clock", /* 14 SIGALRM */
3290 "software termination signal", /* 15 SIGTERM */
3291 "user defined signal 1", /* 16 SIGUSR1 */
3292 "user defined signal 2", /* 17 SIGUSR2 */
3293 "child stopped or terminated", /* 18 SIGCLD */
3294 "power-fail restart", /* 19 SIGPWR */
3295 "window size changed", /* 20 SIGWINCH */
3296 "undefined", /* 21 */
3297 "pollable event occurred", /* 22 SIGPOLL */
3298 "sendable stop signal not from tty", /* 23 SIGSTOP */
3299 "stop signal from tty", /* 24 SIGSTP */
3300 "continue a stopped process", /* 25 SIGCONT */
3301 "attempted background tty read", /* 26 SIGTTIN */
3302 "attempted background tty write", /* 27 SIGTTOU */
3303 "undefined", /* 28 */
3304 "undefined", /* 29 */
3305 "undefined", /* 30 */
3306 "undefined", /* 31 */
3307 "undefined", /* 32 */
3308 "socket (TCP/IP) urgent data arrival", /* 33 SIGURG */
3309 "I/O is possible", /* 34 SIGIO */
3310 "exceeded cpu time limit", /* 35 SIGXCPU */
3311 "exceeded file size limit", /* 36 SIGXFSZ */
3312 "virtual time alarm", /* 37 SIGVTALRM */
3313 "profiling time alarm", /* 38 SIGPROF */
3314 "undefined", /* 39 */
3315 "file record locks revoked", /* 40 SIGLOST */
3316 "undefined", /* 41 */
3317 "undefined", /* 42 */
3318 "undefined", /* 43 */
3319 "undefined", /* 44 */
3320 "undefined", /* 45 */
3321 "undefined", /* 46 */
3322 "undefined", /* 47 */
3323 "undefined", /* 48 */
3324 "undefined", /* 49 */
3325 "undefined", /* 50 */
3326 "undefined", /* 51 */
3327 "undefined", /* 52 */
3328 "undefined", /* 53 */
3329 "undefined", /* 54 */
3330 "undefined", /* 55 */
3331 "undefined", /* 56 */
3332 "undefined", /* 57 */
3333 "undefined", /* 58 */
3334 "undefined", /* 59 */
3335 "undefined", /* 60 */
3336 "undefined", /* 61 */
3337 "undefined", /* 62 */
3338 "undefined", /* 63 */
3339 "notification message in mess. queue", /* 64 SIGDGNOTIFY */
3340 0
3341 };
3342
3343 #endif /* DGUX */
3344 \f
3345 /* Directory routines for systems that don't have them. */
3346
3347 #ifdef SYSV_SYSTEM_DIR
3348
3349 #include <dirent.h>
3350
3351 #if defined(BROKEN_CLOSEDIR) || !defined(HAVE_CLOSEDIR)
3352
3353 int
3354 closedir (dirp)
3355 register DIR *dirp; /* stream from opendir */
3356 {
3357 int rtnval;
3358
3359 rtnval = sys_close (dirp->dd_fd);
3360
3361 /* Some systems (like Solaris) allocate the buffer and the DIR all
3362 in one block. Why in the world are we freeing this ourselves
3363 anyway? */
3364 #if ! (defined (sun) && defined (USG5_4))
3365 xfree ((char *) dirp->dd_buf); /* directory block defined in <dirent.h> */
3366 #endif
3367 xfree ((char *) dirp);
3368
3369 return rtnval;
3370 }
3371 #endif /* BROKEN_CLOSEDIR or not HAVE_CLOSEDIR */
3372 #endif /* SYSV_SYSTEM_DIR */
3373
3374 #ifdef NONSYSTEM_DIR_LIBRARY
3375
3376 DIR *
3377 opendir (filename)
3378 char *filename; /* name of directory */
3379 {
3380 register DIR *dirp; /* -> malloc'ed storage */
3381 register int fd; /* file descriptor for read */
3382 struct stat sbuf; /* result of fstat */
3383
3384 fd = sys_open (filename, 0);
3385 if (fd < 0)
3386 return 0;
3387
3388 BLOCK_INPUT;
3389 if (fstat (fd, &sbuf) < 0
3390 || (sbuf.st_mode & S_IFMT) != S_IFDIR
3391 || (dirp = (DIR *) malloc (sizeof (DIR))) == 0)
3392 {
3393 sys_close (fd);
3394 UNBLOCK_INPUT;
3395 return 0; /* bad luck today */
3396 }
3397 UNBLOCK_INPUT;
3398
3399 dirp->dd_fd = fd;
3400 dirp->dd_loc = dirp->dd_size = 0; /* refill needed */
3401
3402 return dirp;
3403 }
3404
3405 void
3406 closedir (dirp)
3407 register DIR *dirp; /* stream from opendir */
3408 {
3409 sys_close (dirp->dd_fd);
3410 xfree ((char *) dirp);
3411 }
3412
3413
3414 #ifndef VMS
3415 #define DIRSIZ 14
3416 struct olddir
3417 {
3418 ino_t od_ino; /* inode */
3419 char od_name[DIRSIZ]; /* filename */
3420 };
3421 #endif /* not VMS */
3422
3423 struct direct dir_static; /* simulated directory contents */
3424
3425 /* ARGUSED */
3426 struct direct *
3427 readdir (dirp)
3428 register DIR *dirp; /* stream from opendir */
3429 {
3430 #ifndef VMS
3431 register struct olddir *dp; /* -> directory data */
3432 #else /* VMS */
3433 register struct dir$_name *dp; /* -> directory data */
3434 register struct dir$_version *dv; /* -> version data */
3435 #endif /* VMS */
3436
3437 for (; ;)
3438 {
3439 if (dirp->dd_loc >= dirp->dd_size)
3440 dirp->dd_loc = dirp->dd_size = 0;
3441
3442 if (dirp->dd_size == 0 /* refill buffer */
3443 && (dirp->dd_size = sys_read (dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ)) <= 0)
3444 return 0;
3445
3446 #ifndef VMS
3447 dp = (struct olddir *) &dirp->dd_buf[dirp->dd_loc];
3448 dirp->dd_loc += sizeof (struct olddir);
3449
3450 if (dp->od_ino != 0) /* not deleted entry */
3451 {
3452 dir_static.d_ino = dp->od_ino;
3453 strncpy (dir_static.d_name, dp->od_name, DIRSIZ);
3454 dir_static.d_name[DIRSIZ] = '\0';
3455 dir_static.d_namlen = strlen (dir_static.d_name);
3456 dir_static.d_reclen = sizeof (struct direct)
3457 - MAXNAMLEN + 3
3458 + dir_static.d_namlen - dir_static.d_namlen % 4;
3459 return &dir_static; /* -> simulated structure */
3460 }
3461 #else /* VMS */
3462 dp = (struct dir$_name *) dirp->dd_buf;
3463 if (dirp->dd_loc == 0)
3464 dirp->dd_loc = (dp->dir$b_namecount&1) ? dp->dir$b_namecount + 1
3465 : dp->dir$b_namecount;
3466 dv = (struct dir$_version *)&dp->dir$t_name[dirp->dd_loc];
3467 dir_static.d_ino = dv->dir$w_fid_num;
3468 dir_static.d_namlen = dp->dir$b_namecount;
3469 dir_static.d_reclen = sizeof (struct direct)
3470 - MAXNAMLEN + 3
3471 + dir_static.d_namlen - dir_static.d_namlen % 4;
3472 strncpy (dir_static.d_name, dp->dir$t_name, dp->dir$b_namecount);
3473 dir_static.d_name[dir_static.d_namlen] = '\0';
3474 dirp->dd_loc = dirp->dd_size; /* only one record at a time */
3475 return &dir_static;
3476 #endif /* VMS */
3477 }
3478 }
3479
3480 #ifdef VMS
3481 /* readdirver is just like readdir except it returns all versions of a file
3482 as separate entries. */
3483
3484 /* ARGUSED */
3485 struct direct *
3486 readdirver (dirp)
3487 register DIR *dirp; /* stream from opendir */
3488 {
3489 register struct dir$_name *dp; /* -> directory data */
3490 register struct dir$_version *dv; /* -> version data */
3491
3492 if (dirp->dd_loc >= dirp->dd_size - sizeof (struct dir$_name))
3493 dirp->dd_loc = dirp->dd_size = 0;
3494
3495 if (dirp->dd_size == 0 /* refill buffer */
3496 && (dirp->dd_size = sys_read (dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ)) <= 0)
3497 return 0;
3498
3499 dp = (struct dir$_name *) dirp->dd_buf;
3500 if (dirp->dd_loc == 0)
3501 dirp->dd_loc = (dp->dir$b_namecount & 1) ? dp->dir$b_namecount + 1
3502 : dp->dir$b_namecount;
3503 dv = (struct dir$_version *) &dp->dir$t_name[dirp->dd_loc];
3504 strncpy (dir_static.d_name, dp->dir$t_name, dp->dir$b_namecount);
3505 sprintf (&dir_static.d_name[dp->dir$b_namecount], ";%d", dv->dir$w_version);
3506 dir_static.d_namlen = strlen (dir_static.d_name);
3507 dir_static.d_ino = dv->dir$w_fid_num;
3508 dir_static.d_reclen = sizeof (struct direct) - MAXNAMLEN + 3
3509 + dir_static.d_namlen - dir_static.d_namlen % 4;
3510 dirp->dd_loc = ((char *) (++dv) - dp->dir$t_name);
3511 return &dir_static;
3512 }
3513
3514 #endif /* VMS */
3515
3516 #endif /* NONSYSTEM_DIR_LIBRARY */
3517
3518 \f
3519 int
3520 set_file_times (filename, atime, mtime)
3521 char *filename;
3522 EMACS_TIME atime, mtime;
3523 {
3524 #ifdef HAVE_UTIMES
3525 struct timeval tv[2];
3526 tv[0] = atime;
3527 tv[1] = mtime;
3528 return utimes (filename, tv);
3529 #else /* not HAVE_UTIMES */
3530 struct utimbuf utb;
3531 utb.actime = EMACS_SECS (atime);
3532 utb.modtime = EMACS_SECS (mtime);
3533 return utime (filename, &utb);
3534 #endif /* not HAVE_UTIMES */
3535 }
3536 \f
3537 /* mkdir and rmdir functions, for systems which don't have them. */
3538
3539 #ifndef HAVE_MKDIR
3540 /*
3541 * Written by Robert Rother, Mariah Corporation, August 1985.
3542 *
3543 * If you want it, it's yours. All I ask in return is that if you
3544 * figure out how to do this in a Bourne Shell script you send me
3545 * a copy.
3546 * sdcsvax!rmr or rmr@uscd
3547 *
3548 * Severely hacked over by John Gilmore to make a 4.2BSD compatible
3549 * subroutine. 11Mar86; hoptoad!gnu
3550 *
3551 * Modified by rmtodd@uokmax 6-28-87 -- when making an already existing dir,
3552 * subroutine didn't return EEXIST. It does now.
3553 */
3554
3555 /*
3556 * Make a directory.
3557 */
3558 #ifdef MKDIR_PROTOTYPE
3559 MKDIR_PROTOTYPE
3560 #else
3561 int
3562 mkdir (dpath, dmode)
3563 char *dpath;
3564 int dmode;
3565 #endif
3566 {
3567 int cpid, status, fd;
3568 struct stat statbuf;
3569
3570 if (stat (dpath, &statbuf) == 0)
3571 {
3572 errno = EEXIST; /* Stat worked, so it already exists */
3573 return -1;
3574 }
3575
3576 /* If stat fails for a reason other than non-existence, return error */
3577 if (errno != ENOENT)
3578 return -1;
3579
3580 synch_process_alive = 1;
3581 switch (cpid = fork ())
3582 {
3583
3584 case -1: /* Error in fork */
3585 return (-1); /* Errno is set already */
3586
3587 case 0: /* Child process */
3588 /*
3589 * Cheap hack to set mode of new directory. Since this
3590 * child process is going away anyway, we zap its umask.
3591 * FIXME, this won't suffice to set SUID, SGID, etc. on this
3592 * directory. Does anybody care?
3593 */
3594 status = umask (0); /* Get current umask */
3595 status = umask (status | (0777 & ~dmode)); /* Set for mkdir */
3596 fd = sys_open("/dev/null", 2);
3597 if (fd >= 0)
3598 {
3599 dup2 (fd, 0);
3600 dup2 (fd, 1);
3601 dup2 (fd, 2);
3602 }
3603 execl ("/bin/mkdir", "mkdir", dpath, (char *) 0);
3604 _exit (-1); /* Can't exec /bin/mkdir */
3605
3606 default: /* Parent process */
3607 wait_for_termination (cpid);
3608 }
3609
3610 if (synch_process_death != 0 || synch_process_retcode != 0)
3611 {
3612 errno = EIO; /* We don't know why, but */
3613 return -1; /* /bin/mkdir failed */
3614 }
3615
3616 return 0;
3617 }
3618 #endif /* not HAVE_MKDIR */
3619
3620 #ifndef HAVE_RMDIR
3621 int
3622 rmdir (dpath)
3623 char *dpath;
3624 {
3625 int cpid, status, fd;
3626 struct stat statbuf;
3627
3628 if (stat (dpath, &statbuf) != 0)
3629 {
3630 /* Stat just set errno. We don't have to */
3631 return -1;
3632 }
3633
3634 synch_process_alive = 1;
3635 switch (cpid = fork ())
3636 {
3637
3638 case -1: /* Error in fork */
3639 return (-1); /* Errno is set already */
3640
3641 case 0: /* Child process */
3642 fd = sys_open("/dev/null", 2);
3643 if (fd >= 0)
3644 {
3645 dup2 (fd, 0);
3646 dup2 (fd, 1);
3647 dup2 (fd, 2);
3648 }
3649 wait_for_termination (cpid);
3650 if (synch_process_death != 0 || synch_process_retcode != 0)
3651 return -1; /* /bin/rmdir failed */
3652 default: /* Parent process */
3653 while (cpid != wait (&status)); /* Wait for kid to finish */
3654 }
3655
3656 if (WIFSIGNALED (status) || WEXITSTATUS (status) != 0)
3657 {
3658 errno = EIO; /* We don't know why, but */
3659 return -1; /* /bin/mkdir failed */
3660 }
3661
3662 return 0;
3663 }
3664 #endif /* !HAVE_RMDIR */
3665
3666
3667 \f
3668 /* Functions for VMS */
3669 #ifdef VMS
3670 #include "vms-pwd.h"
3671 #include <acldef.h>
3672 #include <chpdef.h>
3673 #include <jpidef.h>
3674
3675 /* Return as a string the VMS error string pertaining to STATUS.
3676 Reuses the same static buffer each time it is called. */
3677
3678 char *
3679 vmserrstr (status)
3680 int status; /* VMS status code */
3681 {
3682 int bufadr[2];
3683 short len;
3684 static char buf[257];
3685
3686 bufadr[0] = sizeof buf - 1;
3687 bufadr[1] = (int) buf;
3688 if (! (SYS$GETMSG (status, &len, bufadr, 0x1, 0) & 1))
3689 return "untranslatable VMS error status";
3690 buf[len] = '\0';
3691 return buf;
3692 }
3693
3694 #ifdef access
3695 #undef access
3696
3697 /* The following is necessary because 'access' emulation by VMS C (2.0) does
3698 * not work correctly. (It also doesn't work well in version 2.3.)
3699 */
3700
3701 #ifdef VMS4_4
3702
3703 #define DESCRIPTOR(name,string) struct dsc$descriptor_s name = \
3704 { strlen (string), DSC$K_DTYPE_T, DSC$K_CLASS_S, string }
3705
3706 typedef union {
3707 struct {
3708 unsigned short s_buflen;
3709 unsigned short s_code;
3710 char *s_bufadr;
3711 unsigned short *s_retlenadr;
3712 } s;
3713 int end;
3714 } item;
3715 #define buflen s.s_buflen
3716 #define code s.s_code
3717 #define bufadr s.s_bufadr
3718 #define retlenadr s.s_retlenadr
3719
3720 #define R_OK 4 /* test for read permission */
3721 #define W_OK 2 /* test for write permission */
3722 #define X_OK 1 /* test for execute (search) permission */
3723 #define F_OK 0 /* test for presence of file */
3724
3725 int
3726 sys_access (path, mode)
3727 char *path;
3728 int mode;
3729 {
3730 static char *user = NULL;
3731 char dir_fn[512];
3732
3733 /* translate possible directory spec into .DIR file name, so brain-dead
3734 * access can treat the directory like a file. */
3735 if (directory_file_name (path, dir_fn))
3736 path = dir_fn;
3737
3738 if (mode == F_OK)
3739 return access (path, mode);
3740 if (user == NULL && (user = (char *) getenv ("USER")) == NULL)
3741 return -1;
3742 {
3743 int stat;
3744 int flags;
3745 int acces;
3746 unsigned short int dummy;
3747 item itemlst[3];
3748 static int constant = ACL$C_FILE;
3749 DESCRIPTOR (path_desc, path);
3750 DESCRIPTOR (user_desc, user);
3751
3752 flags = 0;
3753 acces = 0;
3754 if ((mode & X_OK) && ((stat = access (path, mode)) < 0 || mode == X_OK))
3755 return stat;
3756 if (mode & R_OK)
3757 acces |= CHP$M_READ;
3758 if (mode & W_OK)
3759 acces |= CHP$M_WRITE;
3760 itemlst[0].buflen = sizeof (int);
3761 itemlst[0].code = CHP$_FLAGS;
3762 itemlst[0].bufadr = (char *) &flags;
3763 itemlst[0].retlenadr = &dummy;
3764 itemlst[1].buflen = sizeof (int);
3765 itemlst[1].code = CHP$_ACCESS;
3766 itemlst[1].bufadr = (char *) &acces;
3767 itemlst[1].retlenadr = &dummy;
3768 itemlst[2].end = CHP$_END;
3769 stat = SYS$CHECK_ACCESS (&constant, &path_desc, &user_desc, itemlst);
3770 return stat == SS$_NORMAL ? 0 : -1;
3771 }
3772 }
3773
3774 #else /* not VMS4_4 */
3775
3776 #include <prvdef.h>
3777 #define ACE$M_WRITE 2
3778 #define ACE$C_KEYID 1
3779
3780 static unsigned short memid, grpid;
3781 static unsigned int uic;
3782
3783 /* Called from init_sys_modes, so it happens not very often
3784 but at least each time Emacs is loaded. */
3785 sys_access_reinit ()
3786 {
3787 uic = 0;
3788 }
3789
3790 int
3791 sys_access (filename, type)
3792 char * filename;
3793 int type;
3794 {
3795 struct FAB fab;
3796 struct XABPRO xab;
3797 int status, size, i, typecode, acl_controlled;
3798 unsigned int *aclptr, *aclend, aclbuf[60];
3799 union prvdef prvmask;
3800
3801 /* Get UIC and GRP values for protection checking. */
3802 if (uic == 0)
3803 {
3804 status = LIB$GETJPI (&JPI$_UIC, 0, 0, &uic, 0, 0);
3805 if (! (status & 1))
3806 return -1;
3807 memid = uic & 0xFFFF;
3808 grpid = uic >> 16;
3809 }
3810
3811 if (type != 2) /* not checking write access */
3812 return access (filename, type);
3813
3814 /* Check write protection. */
3815
3816 #define CHECKPRIV(bit) (prvmask.bit)
3817 #define WRITEABLE(field) (! ((xab.xab$w_pro >> field) & XAB$M_NOWRITE))
3818
3819 /* Find privilege bits */
3820 status = SYS$SETPRV (0, 0, 0, prvmask);
3821 if (! (status & 1))
3822 error ("Unable to find privileges: %s", vmserrstr (status));
3823 if (CHECKPRIV (PRV$V_BYPASS))
3824 return 0; /* BYPASS enabled */
3825 fab = cc$rms_fab;
3826 fab.fab$b_fac = FAB$M_GET;
3827 fab.fab$l_fna = filename;
3828 fab.fab$b_fns = strlen (filename);
3829 fab.fab$l_xab = &xab;
3830 xab = cc$rms_xabpro;
3831 xab.xab$l_aclbuf = aclbuf;
3832 xab.xab$w_aclsiz = sizeof (aclbuf);
3833 status = SYS$OPEN (&fab, 0, 0);
3834 if (! (status & 1))
3835 return -1;
3836 SYS$CLOSE (&fab, 0, 0);
3837 /* Check system access */
3838 if (CHECKPRIV (PRV$V_SYSPRV) && WRITEABLE (XAB$V_SYS))
3839 return 0;
3840 /* Check ACL entries, if any */
3841 acl_controlled = 0;
3842 if (xab.xab$w_acllen > 0)
3843 {
3844 aclptr = aclbuf;
3845 aclend = &aclbuf[xab.xab$w_acllen / 4];
3846 while (*aclptr && aclptr < aclend)
3847 {
3848 size = (*aclptr & 0xff) / 4;
3849 typecode = (*aclptr >> 8) & 0xff;
3850 if (typecode == ACE$C_KEYID)
3851 for (i = size - 1; i > 1; i--)
3852 if (aclptr[i] == uic)
3853 {
3854 acl_controlled = 1;
3855 if (aclptr[1] & ACE$M_WRITE)
3856 return 0; /* Write access through ACL */
3857 }
3858 aclptr = &aclptr[size];
3859 }
3860 if (acl_controlled) /* ACL specified, prohibits write access */
3861 return -1;
3862 }
3863 /* No ACL entries specified, check normal protection */
3864 if (WRITEABLE (XAB$V_WLD)) /* World writeable */
3865 return 0;
3866 if (WRITEABLE (XAB$V_GRP) &&
3867 (unsigned short) (xab.xab$l_uic >> 16) == grpid)
3868 return 0; /* Group writeable */
3869 if (WRITEABLE (XAB$V_OWN) &&
3870 (xab.xab$l_uic & 0xFFFF) == memid)
3871 return 0; /* Owner writeable */
3872
3873 return -1; /* Not writeable */
3874 }
3875 #endif /* not VMS4_4 */
3876 #endif /* access */
3877
3878 static char vtbuf[NAM$C_MAXRSS+1];
3879
3880 /* translate a vms file spec to a unix path */
3881 char *
3882 sys_translate_vms (vfile)
3883 char * vfile;
3884 {
3885 char * p;
3886 char * targ;
3887
3888 if (!vfile)
3889 return 0;
3890
3891 targ = vtbuf;
3892
3893 /* leading device or logical name is a root directory */
3894 if (p = strchr (vfile, ':'))
3895 {
3896 *targ++ = '/';
3897 while (vfile < p)
3898 *targ++ = *vfile++;
3899 vfile++;
3900 *targ++ = '/';
3901 }
3902 p = vfile;
3903 if (*p == '[' || *p == '<')
3904 {
3905 while (*++vfile != *p + 2)
3906 switch (*vfile)
3907 {
3908 case '.':
3909 if (vfile[-1] == *p)
3910 *targ++ = '.';
3911 *targ++ = '/';
3912 break;
3913
3914 case '-':
3915 *targ++ = '.';
3916 *targ++ = '.';
3917 break;
3918
3919 default:
3920 *targ++ = *vfile;
3921 break;
3922 }
3923 vfile++;
3924 *targ++ = '/';
3925 }
3926 while (*vfile)
3927 *targ++ = *vfile++;
3928
3929 return vtbuf;
3930 }
3931
3932 static char utbuf[NAM$C_MAXRSS+1];
3933
3934 /* translate a unix path to a VMS file spec */
3935 char *
3936 sys_translate_unix (ufile)
3937 char * ufile;
3938 {
3939 int slash_seen = 0;
3940 char *p;
3941 char * targ;
3942
3943 if (!ufile)
3944 return 0;
3945
3946 targ = utbuf;
3947
3948 if (*ufile == '/')
3949 {
3950 ufile++;
3951 }
3952
3953 while (*ufile)
3954 {
3955 switch (*ufile)
3956 {
3957 case '/':
3958 if (slash_seen)
3959 if (index (&ufile[1], '/'))
3960 *targ++ = '.';
3961 else
3962 *targ++ = ']';
3963 else
3964 {
3965 *targ++ = ':';
3966 if (index (&ufile[1], '/'))
3967 *targ++ = '[';
3968 slash_seen = 1;
3969 }
3970 break;
3971
3972 case '.':
3973 if (strncmp (ufile, "./", 2) == 0)
3974 {
3975 if (!slash_seen)
3976 {
3977 *targ++ = '[';
3978 slash_seen = 1;
3979 }
3980 ufile++; /* skip the dot */
3981 if (index (&ufile[1], '/'))
3982 *targ++ = '.';
3983 else
3984 *targ++ = ']';
3985 }
3986 else if (strncmp (ufile, "../", 3) == 0)
3987 {
3988 if (!slash_seen)
3989 {
3990 *targ++ = '[';
3991 slash_seen = 1;
3992 }
3993 *targ++ = '-';
3994 ufile += 2; /* skip the dots */
3995 if (index (&ufile[1], '/'))
3996 *targ++ = '.';
3997 else
3998 *targ++ = ']';
3999 }
4000 else
4001 *targ++ = *ufile;
4002 break;
4003
4004 default:
4005 *targ++ = *ufile;
4006 break;
4007 }
4008 ufile++;
4009 }
4010 *targ = '\0';
4011
4012 return utbuf;
4013 }
4014
4015 char *
4016 getwd (pathname)
4017 char *pathname;
4018 {
4019 char *ptr, *val;
4020 extern char *getcwd ();
4021
4022 #define MAXPATHLEN 1024
4023
4024 ptr = xmalloc (MAXPATHLEN);
4025 val = getcwd (ptr, MAXPATHLEN);
4026 if (val == 0)
4027 {
4028 xfree (ptr);
4029 return val;
4030 }
4031 strcpy (pathname, ptr);
4032 xfree (ptr);
4033
4034 return pathname;
4035 }
4036
4037 getppid ()
4038 {
4039 long item_code = JPI$_OWNER;
4040 unsigned long parent_id;
4041 int status;
4042
4043 if (((status = LIB$GETJPI (&item_code, 0, 0, &parent_id)) & 1) == 0)
4044 {
4045 errno = EVMSERR;
4046 vaxc$errno = status;
4047 return -1;
4048 }
4049 return parent_id;
4050 }
4051
4052 #undef getuid
4053 unsigned
4054 sys_getuid ()
4055 {
4056 return (getgid () << 16) | getuid ();
4057 }
4058
4059 int
4060 sys_read (fildes, buf, nbyte)
4061 int fildes;
4062 char *buf;
4063 unsigned int nbyte;
4064 {
4065 return read (fildes, buf, (nbyte < MAXIOSIZE ? nbyte : MAXIOSIZE));
4066 }
4067
4068 #if 0
4069 int
4070 sys_write (fildes, buf, nbyte)
4071 int fildes;
4072 char *buf;
4073 unsigned int nbyte;
4074 {
4075 register int nwrote, rtnval = 0;
4076
4077 while (nbyte > MAXIOSIZE && (nwrote = write (fildes, buf, MAXIOSIZE)) > 0) {
4078 nbyte -= nwrote;
4079 buf += nwrote;
4080 rtnval += nwrote;
4081 }
4082 if (nwrote < 0)
4083 return rtnval ? rtnval : -1;
4084 if ((nwrote = write (fildes, buf, nbyte)) < 0)
4085 return rtnval ? rtnval : -1;
4086 return (rtnval + nwrote);
4087 }
4088 #endif /* 0 */
4089
4090 /*
4091 * VAX/VMS VAX C RTL really loses. It insists that records
4092 * end with a newline (carriage return) character, and if they
4093 * don't it adds one (nice of it isn't it!)
4094 *
4095 * Thus we do this stupidity below.
4096 */
4097
4098 int
4099 sys_write (fildes, buf, nbytes)
4100 int fildes;
4101 char *buf;
4102 unsigned int nbytes;
4103 {
4104 register char *p;
4105 register char *e;
4106 int sum = 0;
4107 struct stat st;
4108
4109 fstat (fildes, &st);
4110 p = buf;
4111 while (nbytes > 0)
4112 {
4113 int len, retval;
4114
4115 /* Handle fixed-length files with carriage control. */
4116 if (st.st_fab_rfm == FAB$C_FIX
4117 && ((st.st_fab_rat & (FAB$M_FTN | FAB$M_CR)) != 0))
4118 {
4119 len = st.st_fab_mrs;
4120 retval = write (fildes, p, min (len, nbytes));
4121 if (retval != len)
4122 return -1;
4123 retval++; /* This skips the implied carriage control */
4124 }
4125 else
4126 {
4127 e = p + min (MAXIOSIZE, nbytes) - 1;
4128 while (*e != '\n' && e > p) e--;
4129 if (p == e) /* Ok.. so here we add a newline... sigh. */
4130 e = p + min (MAXIOSIZE, nbytes) - 1;
4131 len = e + 1 - p;
4132 retval = write (fildes, p, len);
4133 if (retval != len)
4134 return -1;
4135 }
4136 p += retval;
4137 sum += retval;
4138 nbytes -= retval;
4139 }
4140 return sum;
4141 }
4142
4143 /* Create file NEW copying its attributes from file OLD. If
4144 OLD is 0 or does not exist, create based on the value of
4145 vms_stmlf_recfm. */
4146
4147 /* Protection value the file should ultimately have.
4148 Set by create_copy_attrs, and use by rename_sansversions. */
4149 static unsigned short int fab_final_pro;
4150
4151 int
4152 creat_copy_attrs (old, new)
4153 char *old, *new;
4154 {
4155 struct FAB fab = cc$rms_fab;
4156 struct XABPRO xabpro;
4157 char aclbuf[256]; /* Choice of size is arbitrary. See below. */
4158 extern int vms_stmlf_recfm;
4159
4160 if (old)
4161 {
4162 fab.fab$b_fac = FAB$M_GET;
4163 fab.fab$l_fna = old;
4164 fab.fab$b_fns = strlen (old);
4165 fab.fab$l_xab = (char *) &xabpro;
4166 xabpro = cc$rms_xabpro;
4167 xabpro.xab$l_aclbuf = aclbuf;
4168 xabpro.xab$w_aclsiz = sizeof aclbuf;
4169 /* Call $OPEN to fill in the fab & xabpro fields. */
4170 if (SYS$OPEN (&fab, 0, 0) & 1)
4171 {
4172 SYS$CLOSE (&fab, 0, 0);
4173 fab.fab$l_alq = 0; /* zero the allocation quantity */
4174 if (xabpro.xab$w_acllen > 0)
4175 {
4176 if (xabpro.xab$w_acllen > sizeof aclbuf)
4177 /* If the acl buffer was too short, redo open with longer one.
4178 Wouldn't need to do this if there were some system imposed
4179 limit on the size of an ACL, but I can't find any such. */
4180 {
4181 xabpro.xab$l_aclbuf = (char *) alloca (xabpro.xab$w_acllen);
4182 xabpro.xab$w_aclsiz = xabpro.xab$w_acllen;
4183 if (SYS$OPEN (&fab, 0, 0) & 1)
4184 SYS$CLOSE (&fab, 0, 0);
4185 else
4186 old = 0;
4187 }
4188 }
4189 else
4190 xabpro.xab$l_aclbuf = 0;
4191 }
4192 else
4193 old = 0;
4194 }
4195 fab.fab$l_fna = new;
4196 fab.fab$b_fns = strlen (new);
4197 if (!old)
4198 {
4199 fab.fab$l_xab = 0;
4200 fab.fab$b_rfm = vms_stmlf_recfm ? FAB$C_STMLF : FAB$C_VAR;
4201 fab.fab$b_rat = FAB$M_CR;
4202 }
4203
4204 /* Set the file protections such that we will be able to manipulate
4205 this file. Once we are done writing and renaming it, we will set
4206 the protections back. */
4207 if (old)
4208 fab_final_pro = xabpro.xab$w_pro;
4209 else
4210 SYS$SETDFPROT (0, &fab_final_pro);
4211 xabpro.xab$w_pro &= 0xff0f; /* set O:rewd for now. This is set back later. */
4212
4213 /* Create the new file with either default attrs or attrs copied
4214 from old file. */
4215 if (!(SYS$CREATE (&fab, 0, 0) & 1))
4216 return -1;
4217 SYS$CLOSE (&fab, 0, 0);
4218 /* As this is a "replacement" for creat, return a file descriptor
4219 opened for writing. */
4220 return open (new, O_WRONLY);
4221 }
4222
4223 #ifdef creat
4224 #undef creat
4225 #include <varargs.h>
4226 #ifdef __GNUC__
4227 #ifndef va_count
4228 #define va_count(X) ((X) = *(((int *) &(va_alist)) - 1))
4229 #endif
4230 #endif
4231
4232 sys_creat (va_alist)
4233 va_dcl
4234 {
4235 va_list list_incrementer;
4236 char *name;
4237 int mode;
4238 int rfd; /* related file descriptor */
4239 int fd; /* Our new file descriptor */
4240 int count;
4241 struct stat st_buf;
4242 char rfm[12];
4243 char rat[15];
4244 char mrs[13];
4245 char fsz[13];
4246 extern int vms_stmlf_recfm;
4247
4248 va_count (count);
4249 va_start (list_incrementer);
4250 name = va_arg (list_incrementer, char *);
4251 mode = va_arg (list_incrementer, int);
4252 if (count > 2)
4253 rfd = va_arg (list_incrementer, int);
4254 va_end (list_incrementer);
4255 if (count > 2)
4256 {
4257 /* Use information from the related file descriptor to set record
4258 format of the newly created file. */
4259 fstat (rfd, &st_buf);
4260 switch (st_buf.st_fab_rfm)
4261 {
4262 case FAB$C_FIX:
4263 strcpy (rfm, "rfm = fix");
4264 sprintf (mrs, "mrs = %d", st_buf.st_fab_mrs);
4265 strcpy (rat, "rat = ");
4266 if (st_buf.st_fab_rat & FAB$M_CR)
4267 strcat (rat, "cr");
4268 else if (st_buf.st_fab_rat & FAB$M_FTN)
4269 strcat (rat, "ftn");
4270 else if (st_buf.st_fab_rat & FAB$M_PRN)
4271 strcat (rat, "prn");
4272 if (st_buf.st_fab_rat & FAB$M_BLK)
4273 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4274 strcat (rat, ", blk");
4275 else
4276 strcat (rat, "blk");
4277 return creat (name, 0, rfm, rat, mrs);
4278
4279 case FAB$C_VFC:
4280 strcpy (rfm, "rfm = vfc");
4281 sprintf (fsz, "fsz = %d", st_buf.st_fab_fsz);
4282 strcpy (rat, "rat = ");
4283 if (st_buf.st_fab_rat & FAB$M_CR)
4284 strcat (rat, "cr");
4285 else if (st_buf.st_fab_rat & FAB$M_FTN)
4286 strcat (rat, "ftn");
4287 else if (st_buf.st_fab_rat & FAB$M_PRN)
4288 strcat (rat, "prn");
4289 if (st_buf.st_fab_rat & FAB$M_BLK)
4290 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4291 strcat (rat, ", blk");
4292 else
4293 strcat (rat, "blk");
4294 return creat (name, 0, rfm, rat, fsz);
4295
4296 case FAB$C_STM:
4297 strcpy (rfm, "rfm = stm");
4298 break;
4299
4300 case FAB$C_STMCR:
4301 strcpy (rfm, "rfm = stmcr");
4302 break;
4303
4304 case FAB$C_STMLF:
4305 strcpy (rfm, "rfm = stmlf");
4306 break;
4307
4308 case FAB$C_UDF:
4309 strcpy (rfm, "rfm = udf");
4310 break;
4311
4312 case FAB$C_VAR:
4313 strcpy (rfm, "rfm = var");
4314 break;
4315 }
4316 strcpy (rat, "rat = ");
4317 if (st_buf.st_fab_rat & FAB$M_CR)
4318 strcat (rat, "cr");
4319 else if (st_buf.st_fab_rat & FAB$M_FTN)
4320 strcat (rat, "ftn");
4321 else if (st_buf.st_fab_rat & FAB$M_PRN)
4322 strcat (rat, "prn");
4323 if (st_buf.st_fab_rat & FAB$M_BLK)
4324 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4325 strcat (rat, ", blk");
4326 else
4327 strcat (rat, "blk");
4328 }
4329 else
4330 {
4331 strcpy (rfm, vms_stmlf_recfm ? "rfm = stmlf" : "rfm=var");
4332 strcpy (rat, "rat=cr");
4333 }
4334 /* Until the VAX C RTL fixes the many bugs with modes, always use
4335 mode 0 to get the user's default protection. */
4336 fd = creat (name, 0, rfm, rat);
4337 if (fd < 0 && errno == EEXIST)
4338 {
4339 if (unlink (name) < 0)
4340 report_file_error ("delete", build_string (name));
4341 fd = creat (name, 0, rfm, rat);
4342 }
4343 return fd;
4344 }
4345 #endif /* creat */
4346
4347 /* fwrite to stdout is S L O W. Speed it up by using fputc...*/
4348 sys_fwrite (ptr, size, num, fp)
4349 register char * ptr;
4350 FILE * fp;
4351 {
4352 register int tot = num * size;
4353
4354 while (tot--)
4355 fputc (*ptr++, fp);
4356 }
4357
4358 /*
4359 * The VMS C library routine creat actually creates a new version of an
4360 * existing file rather than truncating the old version. There are times
4361 * when this is not the desired behavior, for instance, when writing an
4362 * auto save file (you only want one version), or when you don't have
4363 * write permission in the directory containing the file (but the file
4364 * itself is writable). Hence this routine, which is equivalent to
4365 * "close (creat (fn, 0));" on Unix if fn already exists.
4366 */
4367 int
4368 vms_truncate (fn)
4369 char *fn;
4370 {
4371 struct FAB xfab = cc$rms_fab;
4372 struct RAB xrab = cc$rms_rab;
4373 int status;
4374
4375 xfab.fab$l_fop = FAB$M_TEF; /* free allocated but unused blocks on close */
4376 xfab.fab$b_fac = FAB$M_TRN | FAB$M_GET; /* allow truncate and get access */
4377 xfab.fab$b_shr = FAB$M_NIL; /* allow no sharing - file must be locked */
4378 xfab.fab$l_fna = fn;
4379 xfab.fab$b_fns = strlen (fn);
4380 xfab.fab$l_dna = ";0"; /* default to latest version of the file */
4381 xfab.fab$b_dns = 2;
4382 xrab.rab$l_fab = &xfab;
4383
4384 /* This gibberish opens the file, positions to the first record, and
4385 deletes all records from there until the end of file. */
4386 if ((SYS$OPEN (&xfab) & 01) == 01)
4387 {
4388 if ((SYS$CONNECT (&xrab) & 01) == 01 &&
4389 (SYS$FIND (&xrab) & 01) == 01 &&
4390 (SYS$TRUNCATE (&xrab) & 01) == 01)
4391 status = 0;
4392 else
4393 status = -1;
4394 }
4395 else
4396 status = -1;
4397 SYS$CLOSE (&xfab);
4398 return status;
4399 }
4400
4401 /* Define this symbol to actually read SYSUAF.DAT. This requires either
4402 SYSPRV or a readable SYSUAF.DAT. */
4403
4404 #ifdef READ_SYSUAF
4405 /*
4406 * getuaf.c
4407 *
4408 * Routine to read the VMS User Authorization File and return
4409 * a specific user's record.
4410 */
4411
4412 static struct UAF retuaf;
4413
4414 struct UAF *
4415 get_uaf_name (uname)
4416 char * uname;
4417 {
4418 register status;
4419 struct FAB uaf_fab;
4420 struct RAB uaf_rab;
4421
4422 uaf_fab = cc$rms_fab;
4423 uaf_rab = cc$rms_rab;
4424 /* initialize fab fields */
4425 uaf_fab.fab$l_fna = "SYS$SYSTEM:SYSUAF.DAT";
4426 uaf_fab.fab$b_fns = 21;
4427 uaf_fab.fab$b_fac = FAB$M_GET;
4428 uaf_fab.fab$b_org = FAB$C_IDX;
4429 uaf_fab.fab$b_shr = FAB$M_GET|FAB$M_PUT|FAB$M_UPD|FAB$M_DEL;
4430 /* initialize rab fields */
4431 uaf_rab.rab$l_fab = &uaf_fab;
4432 /* open the User Authorization File */
4433 status = SYS$OPEN (&uaf_fab);
4434 if (!(status&1))
4435 {
4436 errno = EVMSERR;
4437 vaxc$errno = status;
4438 return 0;
4439 }
4440 status = SYS$CONNECT (&uaf_rab);
4441 if (!(status&1))
4442 {
4443 errno = EVMSERR;
4444 vaxc$errno = status;
4445 return 0;
4446 }
4447 /* read the requested record - index is in uname */
4448 uaf_rab.rab$l_kbf = uname;
4449 uaf_rab.rab$b_ksz = strlen (uname);
4450 uaf_rab.rab$b_rac = RAB$C_KEY;
4451 uaf_rab.rab$l_ubf = (char *)&retuaf;
4452 uaf_rab.rab$w_usz = sizeof retuaf;
4453 status = SYS$GET (&uaf_rab);
4454 if (!(status&1))
4455 {
4456 errno = EVMSERR;
4457 vaxc$errno = status;
4458 return 0;
4459 }
4460 /* close the User Authorization File */
4461 status = SYS$DISCONNECT (&uaf_rab);
4462 if (!(status&1))
4463 {
4464 errno = EVMSERR;
4465 vaxc$errno = status;
4466 return 0;
4467 }
4468 status = SYS$CLOSE (&uaf_fab);
4469 if (!(status&1))
4470 {
4471 errno = EVMSERR;
4472 vaxc$errno = status;
4473 return 0;
4474 }
4475 return &retuaf;
4476 }
4477
4478 struct UAF *
4479 get_uaf_uic (uic)
4480 unsigned long uic;
4481 {
4482 register status;
4483 struct FAB uaf_fab;
4484 struct RAB uaf_rab;
4485
4486 uaf_fab = cc$rms_fab;
4487 uaf_rab = cc$rms_rab;
4488 /* initialize fab fields */
4489 uaf_fab.fab$l_fna = "SYS$SYSTEM:SYSUAF.DAT";
4490 uaf_fab.fab$b_fns = 21;
4491 uaf_fab.fab$b_fac = FAB$M_GET;
4492 uaf_fab.fab$b_org = FAB$C_IDX;
4493 uaf_fab.fab$b_shr = FAB$M_GET|FAB$M_PUT|FAB$M_UPD|FAB$M_DEL;
4494 /* initialize rab fields */
4495 uaf_rab.rab$l_fab = &uaf_fab;
4496 /* open the User Authorization File */
4497 status = SYS$OPEN (&uaf_fab);
4498 if (!(status&1))
4499 {
4500 errno = EVMSERR;
4501 vaxc$errno = status;
4502 return 0;
4503 }
4504 status = SYS$CONNECT (&uaf_rab);
4505 if (!(status&1))
4506 {
4507 errno = EVMSERR;
4508 vaxc$errno = status;
4509 return 0;
4510 }
4511 /* read the requested record - index is in uic */
4512 uaf_rab.rab$b_krf = 1; /* 1st alternate key */
4513 uaf_rab.rab$l_kbf = (char *) &uic;
4514 uaf_rab.rab$b_ksz = sizeof uic;
4515 uaf_rab.rab$b_rac = RAB$C_KEY;
4516 uaf_rab.rab$l_ubf = (char *)&retuaf;
4517 uaf_rab.rab$w_usz = sizeof retuaf;
4518 status = SYS$GET (&uaf_rab);
4519 if (!(status&1))
4520 {
4521 errno = EVMSERR;
4522 vaxc$errno = status;
4523 return 0;
4524 }
4525 /* close the User Authorization File */
4526 status = SYS$DISCONNECT (&uaf_rab);
4527 if (!(status&1))
4528 {
4529 errno = EVMSERR;
4530 vaxc$errno = status;
4531 return 0;
4532 }
4533 status = SYS$CLOSE (&uaf_fab);
4534 if (!(status&1))
4535 {
4536 errno = EVMSERR;
4537 vaxc$errno = status;
4538 return 0;
4539 }
4540 return &retuaf;
4541 }
4542
4543 static struct passwd retpw;
4544
4545 struct passwd *
4546 cnv_uaf_pw (up)
4547 struct UAF * up;
4548 {
4549 char * ptr;
4550
4551 /* copy these out first because if the username is 32 chars, the next
4552 section will overwrite the first byte of the UIC */
4553 retpw.pw_uid = up->uaf$w_mem;
4554 retpw.pw_gid = up->uaf$w_grp;
4555
4556 /* I suppose this is not the best sytle, to possibly overwrite one
4557 byte beyond the end of the field, but what the heck... */
4558 ptr = &up->uaf$t_username[UAF$S_USERNAME];
4559 while (ptr[-1] == ' ')
4560 ptr--;
4561 *ptr = '\0';
4562 strcpy (retpw.pw_name, up->uaf$t_username);
4563
4564 /* the rest of these are counted ascii strings */
4565 strncpy (retpw.pw_gecos, &up->uaf$t_owner[1], up->uaf$t_owner[0]);
4566 retpw.pw_gecos[up->uaf$t_owner[0]] = '\0';
4567 strncpy (retpw.pw_dir, &up->uaf$t_defdev[1], up->uaf$t_defdev[0]);
4568 retpw.pw_dir[up->uaf$t_defdev[0]] = '\0';
4569 strncat (retpw.pw_dir, &up->uaf$t_defdir[1], up->uaf$t_defdir[0]);
4570 retpw.pw_dir[up->uaf$t_defdev[0] + up->uaf$t_defdir[0]] = '\0';
4571 strncpy (retpw.pw_shell, &up->uaf$t_defcli[1], up->uaf$t_defcli[0]);
4572 retpw.pw_shell[up->uaf$t_defcli[0]] = '\0';
4573
4574 return &retpw;
4575 }
4576 #else /* not READ_SYSUAF */
4577 static struct passwd retpw;
4578 #endif /* not READ_SYSUAF */
4579
4580 struct passwd *
4581 getpwnam (name)
4582 char * name;
4583 {
4584 #ifdef READ_SYSUAF
4585 struct UAF *up;
4586 #else
4587 char * user;
4588 char * dir;
4589 unsigned char * full;
4590 #endif /* READ_SYSUAF */
4591 char *ptr = name;
4592
4593 while (*ptr)
4594 {
4595 if ('a' <= *ptr && *ptr <= 'z')
4596 *ptr -= 040;
4597 ptr++;
4598 }
4599 #ifdef READ_SYSUAF
4600 if (!(up = get_uaf_name (name)))
4601 return 0;
4602 return cnv_uaf_pw (up);
4603 #else
4604 if (strcmp (name, getenv ("USER")) == 0)
4605 {
4606 retpw.pw_uid = getuid ();
4607 retpw.pw_gid = getgid ();
4608 strcpy (retpw.pw_name, name);
4609 if (full = egetenv ("FULLNAME"))
4610 strcpy (retpw.pw_gecos, full);
4611 else
4612 *retpw.pw_gecos = '\0';
4613 strcpy (retpw.pw_dir, egetenv ("HOME"));
4614 *retpw.pw_shell = '\0';
4615 return &retpw;
4616 }
4617 else
4618 return 0;
4619 #endif /* not READ_SYSUAF */
4620 }
4621
4622 struct passwd *
4623 getpwuid (uid)
4624 unsigned long uid;
4625 {
4626 #ifdef READ_SYSUAF
4627 struct UAF * up;
4628
4629 if (!(up = get_uaf_uic (uid)))
4630 return 0;
4631 return cnv_uaf_pw (up);
4632 #else
4633 if (uid == sys_getuid ())
4634 return getpwnam (egetenv ("USER"));
4635 else
4636 return 0;
4637 #endif /* not READ_SYSUAF */
4638 }
4639
4640 /* return total address space available to the current process. This is
4641 the sum of the current p0 size, p1 size and free page table entries
4642 available. */
4643 vlimit ()
4644 {
4645 int item_code;
4646 unsigned long free_pages;
4647 unsigned long frep0va;
4648 unsigned long frep1va;
4649 register status;
4650
4651 item_code = JPI$_FREPTECNT;
4652 if (((status = LIB$GETJPI (&item_code, 0, 0, &free_pages)) & 1) == 0)
4653 {
4654 errno = EVMSERR;
4655 vaxc$errno = status;
4656 return -1;
4657 }
4658 free_pages *= 512;
4659
4660 item_code = JPI$_FREP0VA;
4661 if (((status = LIB$GETJPI (&item_code, 0, 0, &frep0va)) & 1) == 0)
4662 {
4663 errno = EVMSERR;
4664 vaxc$errno = status;
4665 return -1;
4666 }
4667 item_code = JPI$_FREP1VA;
4668 if (((status = LIB$GETJPI (&item_code, 0, 0, &frep1va)) & 1) == 0)
4669 {
4670 errno = EVMSERR;
4671 vaxc$errno = status;
4672 return -1;
4673 }
4674
4675 return free_pages + frep0va + (0x7fffffff - frep1va);
4676 }
4677
4678 define_logical_name (varname, string)
4679 char *varname;
4680 char *string;
4681 {
4682 struct dsc$descriptor_s strdsc =
4683 {strlen (string), DSC$K_DTYPE_T, DSC$K_CLASS_S, string};
4684 struct dsc$descriptor_s envdsc =
4685 {strlen (varname), DSC$K_DTYPE_T, DSC$K_CLASS_S, varname};
4686 struct dsc$descriptor_s lnmdsc =
4687 {7, DSC$K_DTYPE_T, DSC$K_CLASS_S, "LNM$JOB"};
4688
4689 return LIB$SET_LOGICAL (&envdsc, &strdsc, &lnmdsc, 0, 0);
4690 }
4691
4692 delete_logical_name (varname)
4693 char *varname;
4694 {
4695 struct dsc$descriptor_s envdsc =
4696 {strlen (varname), DSC$K_DTYPE_T, DSC$K_CLASS_S, varname};
4697 struct dsc$descriptor_s lnmdsc =
4698 {7, DSC$K_DTYPE_T, DSC$K_CLASS_S, "LNM$JOB"};
4699
4700 return LIB$DELETE_LOGICAL (&envdsc, &lnmdsc);
4701 }
4702
4703 ulimit ()
4704 {}
4705
4706 setpgrp ()
4707 {}
4708
4709 execvp ()
4710 {
4711 error ("execvp system call not implemented");
4712 }
4713
4714 int
4715 rename (from, to)
4716 char *from, *to;
4717 {
4718 int status;
4719 struct FAB from_fab = cc$rms_fab, to_fab = cc$rms_fab;
4720 struct NAM from_nam = cc$rms_nam, to_nam = cc$rms_nam;
4721 char from_esn[NAM$C_MAXRSS];
4722 char to_esn[NAM$C_MAXRSS];
4723
4724 from_fab.fab$l_fna = from;
4725 from_fab.fab$b_fns = strlen (from);
4726 from_fab.fab$l_nam = &from_nam;
4727 from_fab.fab$l_fop = FAB$M_NAM;
4728
4729 from_nam.nam$l_esa = from_esn;
4730 from_nam.nam$b_ess = sizeof from_esn;
4731
4732 to_fab.fab$l_fna = to;
4733 to_fab.fab$b_fns = strlen (to);
4734 to_fab.fab$l_nam = &to_nam;
4735 to_fab.fab$l_fop = FAB$M_NAM;
4736
4737 to_nam.nam$l_esa = to_esn;
4738 to_nam.nam$b_ess = sizeof to_esn;
4739
4740 status = SYS$RENAME (&from_fab, 0, 0, &to_fab);
4741
4742 if (status & 1)
4743 return 0;
4744 else
4745 {
4746 if (status == RMS$_DEV)
4747 errno = EXDEV;
4748 else
4749 errno = EVMSERR;
4750 vaxc$errno = status;
4751 return -1;
4752 }
4753 }
4754
4755 /* This function renames a file like `rename', but it strips
4756 the version number from the "to" filename, such that the "to" file is
4757 will always be a new version. It also sets the file protection once it is
4758 finished. The protection that we will use is stored in fab_final_pro,
4759 and was set when we did a creat_copy_attrs to create the file that we
4760 are renaming.
4761
4762 We could use the chmod function, but Eunichs uses 3 bits per user category
4763 to describe the protection, and VMS uses 4 (write and delete are separate
4764 bits). To maintain portability, the VMS implementation of `chmod' wires
4765 the W and D bits together. */
4766
4767
4768 static struct fibdef fib; /* We need this initialized to zero */
4769 char vms_file_written[NAM$C_MAXRSS];
4770
4771 int
4772 rename_sans_version (from,to)
4773 char *from, *to;
4774 {
4775 short int chan;
4776 int stat;
4777 short int iosb[4];
4778 int status;
4779 struct FAB to_fab = cc$rms_fab;
4780 struct NAM to_nam = cc$rms_nam;
4781 struct dsc$descriptor fib_d ={sizeof (fib),0,0,(char*) &fib};
4782 struct dsc$descriptor fib_attr[2]
4783 = {{sizeof (fab_final_pro),ATR$C_FPRO,0,(char*) &fab_final_pro},{0,0,0,0}};
4784 char to_esn[NAM$C_MAXRSS];
4785
4786 $DESCRIPTOR (disk,to_esn);
4787
4788 to_fab.fab$l_fna = to;
4789 to_fab.fab$b_fns = strlen (to);
4790 to_fab.fab$l_nam = &to_nam;
4791 to_fab.fab$l_fop = FAB$M_NAM;
4792
4793 to_nam.nam$l_esa = to_esn;
4794 to_nam.nam$b_ess = sizeof to_esn;
4795
4796 status = SYS$PARSE (&to_fab, 0, 0); /* figure out the full file name */
4797
4798 if (to_nam.nam$l_fnb && NAM$M_EXP_VER)
4799 *(to_nam.nam$l_ver) = '\0';
4800
4801 stat = rename (from, to_esn);
4802 if (stat < 0)
4803 return stat;
4804
4805 strcpy (vms_file_written, to_esn);
4806
4807 to_fab.fab$l_fna = vms_file_written; /* this points to the versionless name */
4808 to_fab.fab$b_fns = strlen (vms_file_written);
4809
4810 /* Now set the file protection to the correct value */
4811 SYS$OPEN (&to_fab, 0, 0); /* This fills in the nam$w_fid fields */
4812
4813 /* Copy these fields into the fib */
4814 fib.fib$r_fid_overlay.fib$w_fid[0] = to_nam.nam$w_fid[0];
4815 fib.fib$r_fid_overlay.fib$w_fid[1] = to_nam.nam$w_fid[1];
4816 fib.fib$r_fid_overlay.fib$w_fid[2] = to_nam.nam$w_fid[2];
4817
4818 SYS$CLOSE (&to_fab, 0, 0);
4819
4820 stat = SYS$ASSIGN (&disk, &chan, 0, 0); /* open a channel to the disk */
4821 if (!stat)
4822 LIB$SIGNAL (stat);
4823 stat = SYS$QIOW (0, chan, IO$_MODIFY, iosb, 0, 0, &fib_d,
4824 0, 0, 0, &fib_attr, 0);
4825 if (!stat)
4826 LIB$SIGNAL (stat);
4827 stat = SYS$DASSGN (chan);
4828 if (!stat)
4829 LIB$SIGNAL (stat);
4830 strcpy (vms_file_written, to_esn); /* We will write this to the terminal*/
4831 return 0;
4832 }
4833
4834 link (file, new)
4835 char * file, * new;
4836 {
4837 register status;
4838 struct FAB fab;
4839 struct NAM nam;
4840 unsigned short fid[3];
4841 char esa[NAM$C_MAXRSS];
4842
4843 fab = cc$rms_fab;
4844 fab.fab$l_fop = FAB$M_OFP;
4845 fab.fab$l_fna = file;
4846 fab.fab$b_fns = strlen (file);
4847 fab.fab$l_nam = &nam;
4848
4849 nam = cc$rms_nam;
4850 nam.nam$l_esa = esa;
4851 nam.nam$b_ess = NAM$C_MAXRSS;
4852
4853 status = SYS$PARSE (&fab);
4854 if ((status & 1) == 0)
4855 {
4856 errno = EVMSERR;
4857 vaxc$errno = status;
4858 return -1;
4859 }
4860 status = SYS$SEARCH (&fab);
4861 if ((status & 1) == 0)
4862 {
4863 errno = EVMSERR;
4864 vaxc$errno = status;
4865 return -1;
4866 }
4867
4868 fid[0] = nam.nam$w_fid[0];
4869 fid[1] = nam.nam$w_fid[1];
4870 fid[2] = nam.nam$w_fid[2];
4871
4872 fab.fab$l_fna = new;
4873 fab.fab$b_fns = strlen (new);
4874
4875 status = SYS$PARSE (&fab);
4876 if ((status & 1) == 0)
4877 {
4878 errno = EVMSERR;
4879 vaxc$errno = status;
4880 return -1;
4881 }
4882
4883 nam.nam$w_fid[0] = fid[0];
4884 nam.nam$w_fid[1] = fid[1];
4885 nam.nam$w_fid[2] = fid[2];
4886
4887 nam.nam$l_esa = nam.nam$l_name;
4888 nam.nam$b_esl = nam.nam$b_name + nam.nam$b_type + nam.nam$b_ver;
4889
4890 status = SYS$ENTER (&fab);
4891 if ((status & 1) == 0)
4892 {
4893 errno = EVMSERR;
4894 vaxc$errno = status;
4895 return -1;
4896 }
4897
4898 return 0;
4899 }
4900
4901 croak (badfunc)
4902 char *badfunc;
4903 {
4904 printf ("%s not yet implemented\r\n", badfunc);
4905 reset_sys_modes ();
4906 exit (1);
4907 }
4908
4909 long
4910 random ()
4911 {
4912 /* Arrange to return a range centered on zero. */
4913 return rand () - (1 << 30);
4914 }
4915
4916 srandom (seed)
4917 {
4918 srand (seed);
4919 }
4920 #endif /* VMS */
4921 \f
4922 #ifdef AIXHFT
4923
4924 /* Called from init_sys_modes. */
4925 hft_init ()
4926 {
4927 int junk;
4928
4929 /* If we're not on an HFT we shouldn't do any of this. We determine
4930 if we are on an HFT by trying to get an HFT error code. If this
4931 call fails, we're not on an HFT. */
4932 #ifdef IBMR2AIX
4933 if (ioctl (0, HFQERROR, &junk) < 0)
4934 return;
4935 #else /* not IBMR2AIX */
4936 if (ioctl (0, HFQEIO, 0) < 0)
4937 return;
4938 #endif /* not IBMR2AIX */
4939
4940 /* On AIX the default hft keyboard mapping uses backspace rather than delete
4941 as the rubout key's ASCII code. Here this is changed. The bug is that
4942 there's no way to determine the old mapping, so in reset_sys_modes
4943 we need to assume that the normal map had been present. Of course, this
4944 code also doesn't help if on a terminal emulator which doesn't understand
4945 HFT VTD's. */
4946 {
4947 struct hfbuf buf;
4948 struct hfkeymap keymap;
4949
4950 buf.hf_bufp = (char *)&keymap;
4951 buf.hf_buflen = sizeof (keymap);
4952 keymap.hf_nkeys = 2;
4953 keymap.hfkey[0].hf_kpos = 15;
4954 keymap.hfkey[0].hf_kstate = HFMAPCHAR | HFSHFNONE;
4955 #ifdef IBMR2AIX
4956 keymap.hfkey[0].hf_keyidh = '<';
4957 #else /* not IBMR2AIX */
4958 keymap.hfkey[0].hf_page = '<';
4959 #endif /* not IBMR2AIX */
4960 keymap.hfkey[0].hf_char = 127;
4961 keymap.hfkey[1].hf_kpos = 15;
4962 keymap.hfkey[1].hf_kstate = HFMAPCHAR | HFSHFSHFT;
4963 #ifdef IBMR2AIX
4964 keymap.hfkey[1].hf_keyidh = '<';
4965 #else /* not IBMR2AIX */
4966 keymap.hfkey[1].hf_page = '<';
4967 #endif /* not IBMR2AIX */
4968 keymap.hfkey[1].hf_char = 127;
4969 hftctl (0, HFSKBD, &buf);
4970 }
4971 /* The HFT system on AIX doesn't optimize for scrolling, so it's really ugly
4972 at times. */
4973 line_ins_del_ok = char_ins_del_ok = 0;
4974 }
4975
4976 /* Reset the rubout key to backspace. */
4977
4978 hft_reset ()
4979 {
4980 struct hfbuf buf;
4981 struct hfkeymap keymap;
4982 int junk;
4983
4984 #ifdef IBMR2AIX
4985 if (ioctl (0, HFQERROR, &junk) < 0)
4986 return;
4987 #else /* not IBMR2AIX */
4988 if (ioctl (0, HFQEIO, 0) < 0)
4989 return;
4990 #endif /* not IBMR2AIX */
4991
4992 buf.hf_bufp = (char *)&keymap;
4993 buf.hf_buflen = sizeof (keymap);
4994 keymap.hf_nkeys = 2;
4995 keymap.hfkey[0].hf_kpos = 15;
4996 keymap.hfkey[0].hf_kstate = HFMAPCHAR | HFSHFNONE;
4997 #ifdef IBMR2AIX
4998 keymap.hfkey[0].hf_keyidh = '<';
4999 #else /* not IBMR2AIX */
5000 keymap.hfkey[0].hf_page = '<';
5001 #endif /* not IBMR2AIX */
5002 keymap.hfkey[0].hf_char = 8;
5003 keymap.hfkey[1].hf_kpos = 15;
5004 keymap.hfkey[1].hf_kstate = HFMAPCHAR | HFSHFSHFT;
5005 #ifdef IBMR2AIX
5006 keymap.hfkey[1].hf_keyidh = '<';
5007 #else /* not IBMR2AIX */
5008 keymap.hfkey[1].hf_page = '<';
5009 #endif /* not IBMR2AIX */
5010 keymap.hfkey[1].hf_char = 8;
5011 hftctl (0, HFSKBD, &buf);
5012 }
5013
5014 #endif /* AIXHFT */
5015
5016 #ifdef USE_DL_STUBS
5017
5018 /* These are included on Sunos 4.1 when we do not use shared libraries.
5019 X11 libraries may refer to these functions but (we hope) do not
5020 actually call them. */
5021
5022 void *
5023 dlopen ()
5024 {
5025 return 0;
5026 }
5027
5028 void *
5029 dlsym ()
5030 {
5031 return 0;
5032 }
5033
5034 int
5035 dlclose ()
5036 {
5037 return -1;
5038 }
5039
5040 #endif /* USE_DL_STUBS */
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