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[bpt/emacs.git] / src / sysdep.c
1 /* Interfaces to system-dependent kernel and library entries.
2 Copyright (C) 1985, 86, 87, 88, 93, 94, 95 Free Software Foundation, Inc.
3
4 This file is part of GNU Emacs.
5
6 GNU Emacs is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
9 any later version.
10
11 GNU Emacs is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with GNU Emacs; see the file COPYING. If not, write to
18 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
20
21
22 #include <signal.h>
23 #include <setjmp.h>
24
25 #include <config.h>
26 #include "lisp.h"
27 #include "blockinput.h"
28 #undef NULL
29
30 #define min(x,y) ((x) > (y) ? (y) : (x))
31
32 /* In this file, open, read and write refer to the system calls,
33 not our sugared interfaces sys_open, sys_read and sys_write.
34 Contrariwise, for systems where we use the system calls directly,
35 define sys_read, etc. here as aliases for them. */
36 #ifndef read
37 #define sys_read read
38 #define sys_write write
39 #endif /* `read' is not a macro */
40
41 #undef read
42 #undef write
43
44 #ifdef WINDOWSNT
45 #define read _read
46 #define write _write
47 #include <windows.h>
48 extern int errno;
49 #endif /* not WINDOWSNT */
50
51 #ifndef close
52 #define sys_close close
53 #else
54 #undef close
55 #endif
56
57 #ifndef open
58 #define sys_open open
59 #else /* `open' is a macro */
60 #undef open
61 #endif /* `open' is a macro */
62
63 /* Does anyone other than VMS need this? */
64 #ifndef fwrite
65 #define sys_fwrite fwrite
66 #else
67 #undef fwrite
68 #endif
69
70 #ifndef HAVE_H_ERRNO
71 extern int h_errno;
72 #endif
73
74 #include <stdio.h>
75 #include <sys/types.h>
76 #include <sys/stat.h>
77 #include <errno.h>
78
79 /* Get _POSIX_VDISABLE, if it is available. */
80 #ifdef HAVE_UNISTD_H
81 #include <unistd.h>
82 #endif
83
84 /* Get SI_SRPC_DOMAIN, if it is available. */
85 #ifdef HAVE_SYS_SYSTEMINFO_H
86 #include <sys/systeminfo.h>
87 #endif
88
89 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida, MW Aug 1993 */
90 #include <dos.h>
91 #include "dosfns.h"
92 #include "msdos.h"
93 #include <sys/param.h>
94
95 #if __DJGPP__ > 1
96 extern int etext;
97 extern unsigned start __asm__ ("start");
98 #endif
99 #endif
100
101 extern int errno;
102
103 #ifdef VMS
104 #include <rms.h>
105 #include <ttdef.h>
106 #include <tt2def.h>
107 #include <iodef.h>
108 #include <ssdef.h>
109 #include <descrip.h>
110 #include <fibdef.h>
111 #include <atrdef.h>
112 #include <ctype.h>
113 #include <string.h>
114 #ifdef __GNUC__
115 #include <sys/file.h>
116 #else
117 #include <file.h>
118 #endif
119 #undef F_SETFL
120 #ifndef RAB$C_BID
121 #include <rab.h>
122 #endif
123 #define MAXIOSIZE (32 * PAGESIZE) /* Don't I/O more than 32 blocks at a time */
124 #endif /* VMS */
125
126 #ifndef BSD4_1
127 #ifdef BSD_SYSTEM /* avoid writing defined (BSD_SYSTEM) || defined (USG)
128 because the vms compiler doesn't grok `defined' */
129 #include <fcntl.h>
130 #endif
131 #ifdef USG
132 #ifndef USG5
133 #include <fcntl.h>
134 #endif
135 #endif
136 #endif /* not 4.1 bsd */
137
138 #ifndef MSDOS
139 #include <sys/ioctl.h>
140 #endif
141
142 #include "systty.h"
143 #include "syswait.h"
144
145 #ifdef BROKEN_TIOCGWINSZ
146 #undef TIOCGWINSZ
147 #undef TIOCSWINSZ
148 #endif
149
150 #ifdef USG
151 #include <sys/utsname.h>
152 #include <string.h>
153 #ifndef MEMORY_IN_STRING_H
154 #include <memory.h>
155 #endif
156 #if defined (TIOCGWINSZ) || defined (ISC4_0)
157 #ifdef NEED_SIOCTL
158 #include <sys/sioctl.h>
159 #endif
160 #ifdef NEED_PTEM_H
161 #include <sys/stream.h>
162 #include <sys/ptem.h>
163 #endif
164 #endif /* TIOCGWINSZ or ISC4_0 */
165 #endif /* USG */
166
167 extern int quit_char;
168
169 #include "frame.h"
170 #include "window.h"
171 #include "termhooks.h"
172 #include "termchar.h"
173 #include "termopts.h"
174 #include "dispextern.h"
175 #include "process.h"
176
177 #ifdef WINDOWSNT
178 #include <direct.h>
179 /* In process.h which conflicts with the local copy. */
180 #define _P_WAIT 0
181 int _CRTAPI1 _spawnlp (int, const char *, const char *, ...);
182 int _CRTAPI1 _getpid (void);
183 #endif
184
185 #ifdef NONSYSTEM_DIR_LIBRARY
186 #include "ndir.h"
187 #endif /* NONSYSTEM_DIR_LIBRARY */
188
189 #include "syssignal.h"
190 #include "systime.h"
191 #ifdef HAVE_UTIME_H
192 #include <utime.h>
193 #endif
194
195 #ifndef HAVE_UTIMES
196 #ifndef HAVE_STRUCT_UTIMBUF
197 /* We want to use utime rather than utimes, but we couldn't find the
198 structure declaration. We'll use the traditional one. */
199 struct utimbuf {
200 long actime;
201 long modtime;
202 };
203 #endif
204 #endif
205
206 #ifndef VFORK_RETURN_TYPE
207 #define VFORK_RETURN_TYPE int
208 #endif
209
210 /* LPASS8 is new in 4.3, and makes cbreak mode provide all 8 bits. */
211 #ifndef LPASS8
212 #define LPASS8 0
213 #endif
214
215 #ifdef BSD4_1
216 #define LNOFLSH 0100000
217 #endif
218
219 static int baud_convert[] =
220 #ifdef BAUD_CONVERT
221 BAUD_CONVERT;
222 #else
223 {
224 0, 50, 75, 110, 135, 150, 200, 300, 600, 1200,
225 1800, 2400, 4800, 9600, 19200, 38400
226 };
227 #endif
228
229 #if defined (HAVE_TERMIOS_H) && defined (LINUX)
230 #include <termios.h>
231 /* HJL's version of libc is said to need this on the Alpha.
232 On the other hand, DEC OSF1 on the Alpha needs ospeed to be a short. */
233 extern speed_t ospeed;
234 #else
235 extern short ospeed;
236 #endif
237
238 /* The file descriptor for Emacs's input terminal.
239 Under Unix, this is normally zero except when using X;
240 under VMS, we place the input channel number here. */
241 int input_fd;
242 \f
243 /* Specify a different file descriptor for further input operations. */
244
245 void
246 change_input_fd (fd)
247 int fd;
248 {
249 input_fd = fd;
250 }
251
252 /* Discard pending input on descriptor input_fd. */
253
254 discard_tty_input ()
255 {
256 #ifndef WINDOWSNT
257 struct emacs_tty buf;
258
259 if (noninteractive)
260 return;
261
262 /* Discarding input is not safe when the input could contain
263 replies from the X server. So don't do it. */
264 if (read_socket_hook)
265 return;
266
267 #ifdef VMS
268 end_kbd_input ();
269 SYS$QIOW (0, input_fd, IO$_READVBLK|IO$M_PURGE, input_iosb, 0, 0,
270 &buf.main, 0, 0, terminator_mask, 0, 0);
271 queue_kbd_input ();
272 #else /* not VMS */
273 #ifdef APOLLO
274 {
275 int zero = 0;
276 ioctl (input_fd, TIOCFLUSH, &zero);
277 }
278 #else /* not Apollo */
279 #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */
280 while (dos_keyread () != -1)
281 ;
282 #else /* not MSDOS */
283 EMACS_GET_TTY (input_fd, &buf);
284 EMACS_SET_TTY (input_fd, &buf, 0);
285 #endif /* not MSDOS */
286 #endif /* not Apollo */
287 #endif /* not VMS */
288 #endif /* not WINDOWSNT */
289 }
290
291 #ifdef SIGTSTP
292
293 /* Arrange for character C to be read as the next input from
294 the terminal. */
295
296 stuff_char (c)
297 char c;
298 {
299 if (read_socket_hook)
300 return;
301
302 /* Should perhaps error if in batch mode */
303 #ifdef TIOCSTI
304 ioctl (input_fd, TIOCSTI, &c);
305 #else /* no TIOCSTI */
306 error ("Cannot stuff terminal input characters in this version of Unix");
307 #endif /* no TIOCSTI */
308 }
309
310 #endif /* SIGTSTP */
311 \f
312 init_baud_rate ()
313 {
314 if (noninteractive)
315 ospeed = 0;
316 else
317 {
318 #ifdef INIT_BAUD_RATE
319 INIT_BAUD_RATE ();
320 #else
321 #ifdef DOS_NT
322 ospeed = 15;
323 #else /* not DOS_NT */
324 #ifdef VMS
325 struct sensemode sg;
326
327 SYS$QIOW (0, input_fd, IO$_SENSEMODE, &sg, 0, 0,
328 &sg.class, 12, 0, 0, 0, 0 );
329 ospeed = sg.xmit_baud;
330 #else /* not VMS */
331 #ifdef HAVE_TERMIOS
332 struct termios sg;
333
334 sg.c_cflag = B9600;
335 tcgetattr (input_fd, &sg);
336 ospeed = cfgetospeed (&sg);
337 #if defined (USE_GETOBAUD) && defined (getobaud)
338 /* m88k-motorola-sysv3 needs this (ghazi@noc.rutgers.edu) 9/1/94. */
339 if (ospeed == 0)
340 ospeed = getobaud (sg.c_cflag);
341 #endif
342 #else /* neither VMS nor TERMIOS */
343 #ifdef HAVE_TERMIO
344 struct termio sg;
345
346 sg.c_cflag = B9600;
347 #ifdef HAVE_TCATTR
348 tcgetattr (input_fd, &sg);
349 #else
350 ioctl (input_fd, TCGETA, &sg);
351 #endif
352 ospeed = sg.c_cflag & CBAUD;
353 #else /* neither VMS nor TERMIOS nor TERMIO */
354 struct sgttyb sg;
355
356 sg.sg_ospeed = B9600;
357 if (ioctl (input_fd, TIOCGETP, &sg) < 0)
358 abort ();
359 ospeed = sg.sg_ospeed;
360 #endif /* not HAVE_TERMIO */
361 #endif /* not HAVE_TERMIOS */
362 #endif /* not VMS */
363 #endif /* not DOS_NT */
364 #endif /* not INIT_BAUD_RATE */
365 }
366
367 baud_rate = (ospeed < sizeof baud_convert / sizeof baud_convert[0]
368 ? baud_convert[ospeed] : 9600);
369 if (baud_rate == 0)
370 baud_rate = 1200;
371 }
372
373 /*ARGSUSED*/
374 set_exclusive_use (fd)
375 int fd;
376 {
377 #ifdef FIOCLEX
378 ioctl (fd, FIOCLEX, 0);
379 #endif
380 /* Ok to do nothing if this feature does not exist */
381 }
382 \f
383 #ifndef subprocesses
384
385 wait_without_blocking ()
386 {
387 #ifdef BSD_SYSTEM
388 wait3 (0, WNOHANG | WUNTRACED, 0);
389 #else
390 croak ("wait_without_blocking");
391 #endif
392 synch_process_alive = 0;
393 }
394
395 #endif /* not subprocesses */
396
397 int wait_debugging; /* Set nonzero to make following function work under dbx
398 (at least for bsd). */
399
400 SIGTYPE
401 wait_for_termination_signal ()
402 {}
403
404 /* Wait for subprocess with process id `pid' to terminate and
405 make sure it will get eliminated (not remain forever as a zombie) */
406
407 wait_for_termination (pid)
408 int pid;
409 {
410 while (1)
411 {
412 #ifdef subprocesses
413 #ifdef VMS
414 int status;
415
416 status = SYS$FORCEX (&pid, 0, 0);
417 break;
418 #else /* not VMS */
419 #if defined (BSD_SYSTEM) || (defined (HPUX) && !defined (HPUX_5))
420 /* Note that kill returns -1 even if the process is just a zombie now.
421 But inevitably a SIGCHLD interrupt should be generated
422 and child_sig will do wait3 and make the process go away. */
423 /* There is some indication that there is a bug involved with
424 termination of subprocesses, perhaps involving a kernel bug too,
425 but no idea what it is. Just as a hunch we signal SIGCHLD to see
426 if that causes the problem to go away or get worse. */
427 sigsetmask (sigmask (SIGCHLD));
428 if (0 > kill (pid, 0))
429 {
430 sigsetmask (SIGEMPTYMASK);
431 kill (getpid (), SIGCHLD);
432 break;
433 }
434 if (wait_debugging)
435 sleep (1);
436 else
437 sigpause (SIGEMPTYMASK);
438 #else /* not BSD_SYSTEM, and not HPUX version >= 6 */
439 #if defined (UNIPLUS)
440 if (0 > kill (pid, 0))
441 break;
442 wait (0);
443 #else /* neither BSD_SYSTEM nor UNIPLUS: random sysV */
444 #ifdef POSIX_SIGNALS /* would this work for LINUX as well? */
445 sigblock (sigmask (SIGCHLD));
446 if (0 > kill (pid, 0))
447 {
448 sigunblock (sigmask (SIGCHLD));
449 break;
450 }
451 sigpause (SIGEMPTYMASK);
452 #else /* not POSIX_SIGNALS */
453 #ifdef HAVE_SYSV_SIGPAUSE
454 sighold (SIGCHLD);
455 if (0 > kill (pid, 0))
456 {
457 sigrelse (SIGCHLD);
458 break;
459 }
460 sigpause (SIGCHLD);
461 #else /* not HAVE_SYSV_SIGPAUSE */
462 #ifdef WINDOWSNT
463 wait (0);
464 break;
465 #else /* not WINDOWSNT */
466 if (0 > kill (pid, 0))
467 break;
468 /* Using sleep instead of pause avoids timing error.
469 If the inferior dies just before the sleep,
470 we lose just one second. */
471 sleep (1);
472 #endif /* not WINDOWSNT */
473 #endif /* not HAVE_SYSV_SIGPAUSE */
474 #endif /* not POSIX_SIGNALS */
475 #endif /* not UNIPLUS */
476 #endif /* not BSD_SYSTEM, and not HPUX version >= 6 */
477 #endif /* not VMS */
478 #else /* not subprocesses */
479 #if __DJGPP__ > 1
480 break;
481 #else /* not __DJGPP__ > 1 */
482 #ifndef BSD4_1
483 if (kill (pid, 0) < 0)
484 break;
485 wait (0);
486 #else /* BSD4_1 */
487 int status;
488 status = wait (0);
489 if (status == pid || status == -1)
490 break;
491 #endif /* BSD4_1 */
492 #endif /* not __DJGPP__ > 1*/
493 #endif /* not subprocesses */
494 }
495 }
496
497 #ifdef subprocesses
498
499 /*
500 * flush any pending output
501 * (may flush input as well; it does not matter the way we use it)
502 */
503
504 flush_pending_output (channel)
505 int channel;
506 {
507 #ifdef HAVE_TERMIOS
508 /* If we try this, we get hit with SIGTTIN, because
509 the child's tty belongs to the child's pgrp. */
510 #else
511 #ifdef TCFLSH
512 ioctl (channel, TCFLSH, 1);
513 #else
514 #ifdef TIOCFLUSH
515 int zero = 0;
516 /* 3rd arg should be ignored
517 but some 4.2 kernels actually want the address of an int
518 and nonzero means something different. */
519 ioctl (channel, TIOCFLUSH, &zero);
520 #endif
521 #endif
522 #endif
523 }
524 \f
525 #ifndef VMS
526 /* Set up the terminal at the other end of a pseudo-terminal that
527 we will be controlling an inferior through.
528 It should not echo or do line-editing, since that is done
529 in Emacs. No padding needed for insertion into an Emacs buffer. */
530
531 child_setup_tty (out)
532 int out;
533 {
534 #ifndef DOS_NT
535 struct emacs_tty s;
536
537 EMACS_GET_TTY (out, &s);
538
539 #if defined (HAVE_TERMIO) || defined (HAVE_TERMIOS)
540 s.main.c_oflag |= OPOST; /* Enable output postprocessing */
541 s.main.c_oflag &= ~ONLCR; /* Disable map of NL to CR-NL on output */
542 #ifdef NLDLY
543 s.main.c_oflag &= ~(NLDLY|CRDLY|TABDLY|BSDLY|VTDLY|FFDLY);
544 /* No output delays */
545 #endif
546 s.main.c_lflag &= ~ECHO; /* Disable echo */
547 s.main.c_lflag |= ISIG; /* Enable signals */
548 #ifdef IUCLC
549 s.main.c_iflag &= ~IUCLC; /* Disable downcasing on input. */
550 #endif
551 #ifdef ISTRIP
552 s.main.c_iflag &= ~ISTRIP; /* don't strip 8th bit on input */
553 #endif
554 #ifdef OLCUC
555 s.main.c_oflag &= ~OLCUC; /* Disable upcasing on output. */
556 #endif
557 s.main.c_oflag &= ~TAB3; /* Disable tab expansion */
558 s.main.c_cflag = (s.main.c_cflag & ~CSIZE) | CS8; /* Don't strip 8th bit */
559 #if 0
560 /* Said to be unnecessary: */
561 s.main.c_cc[VMIN] = 1; /* minimum number of characters to accept */
562 s.main.c_cc[VTIME] = 0; /* wait forever for at least 1 character */
563 #endif
564
565 s.main.c_lflag |= ICANON; /* Enable erase/kill and eof processing */
566 s.main.c_cc[VEOF] = 04; /* insure that EOF is Control-D */
567 s.main.c_cc[VERASE] = CDISABLE; /* disable erase processing */
568 s.main.c_cc[VKILL] = CDISABLE; /* disable kill processing */
569
570 #ifdef HPUX
571 s.main.c_cflag = (s.main.c_cflag & ~CBAUD) | B9600; /* baud rate sanity */
572 #endif /* HPUX */
573
574 #ifdef AIX
575 /* AIX enhanced edit loses NULs, so disable it */
576 #ifndef IBMR2AIX
577 s.main.c_line = 0;
578 s.main.c_iflag &= ~ASCEDIT;
579 #endif
580 /* Also, PTY overloads NUL and BREAK.
581 don't ignore break, but don't signal either, so it looks like NUL. */
582 s.main.c_iflag &= ~IGNBRK;
583 s.main.c_iflag &= ~BRKINT;
584 /* QUIT and INTR work better as signals, so disable character forms */
585 s.main.c_cc[VINTR] = 0377;
586 #ifdef SIGNALS_VIA_CHARACTERS
587 /* the QUIT and INTR character are used in process_send_signal
588 so set them here to something useful. */
589 if (s.main.c_cc[VQUIT] == 0377)
590 s.main.c_cc[VQUIT] = '\\'&037; /* Control-\ */
591 if (s.main.c_cc[VINTR] == 0377)
592 s.main.c_cc[VINTR] = 'C'&037; /* Control-C */
593 #else /* no TIOCGPGRP or no TIOCGLTC or no TIOCGETC */
594 /* QUIT and INTR work better as signals, so disable character forms */
595 s.main.c_cc[VQUIT] = 0377;
596 s.main.c_cc[VINTR] = 0377;
597 s.main.c_lflag &= ~ISIG;
598 #endif /* no TIOCGPGRP or no TIOCGLTC or no TIOCGETC */
599 s.main.c_cc[VEOL] = 0377;
600 s.main.c_cflag = (s.main.c_cflag & ~CBAUD) | B9600; /* baud rate sanity */
601 #endif /* AIX */
602
603 #else /* not HAVE_TERMIO */
604
605 s.main.sg_flags &= ~(ECHO | CRMOD | ANYP | ALLDELAY | RAW | LCASE
606 | CBREAK | TANDEM);
607 s.main.sg_flags |= LPASS8;
608 s.main.sg_erase = 0377;
609 s.main.sg_kill = 0377;
610 s.lmode = LLITOUT | s.lmode; /* Don't strip 8th bit */
611
612 #endif /* not HAVE_TERMIO */
613
614 EMACS_SET_TTY (out, &s, 0);
615
616 #ifdef BSD4_1
617 if (interrupt_input)
618 reset_sigio ();
619 #endif /* BSD4_1 */
620 #ifdef RTU
621 {
622 int zero = 0;
623 ioctl (out, FIOASYNC, &zero);
624 }
625 #endif /* RTU */
626 #endif /* not DOS_NT */
627 }
628 #endif /* not VMS */
629
630 #endif /* subprocesses */
631 \f
632 /* Record a signal code and the handler for it. */
633 struct save_signal
634 {
635 int code;
636 SIGTYPE (*handler) ();
637 };
638
639 /* Suspend the Emacs process; give terminal to its superior. */
640
641 sys_suspend ()
642 {
643 #ifdef VMS
644 /* "Foster" parentage allows emacs to return to a subprocess that attached
645 to the current emacs as a cheaper than starting a whole new process. This
646 is set up by KEPTEDITOR.COM. */
647 unsigned long parent_id, foster_parent_id;
648 char *fpid_string;
649
650 fpid_string = getenv ("EMACS_PARENT_PID");
651 if (fpid_string != NULL)
652 {
653 sscanf (fpid_string, "%x", &foster_parent_id);
654 if (foster_parent_id != 0)
655 parent_id = foster_parent_id;
656 else
657 parent_id = getppid ();
658 }
659 else
660 parent_id = getppid ();
661
662 xfree (fpid_string); /* On VMS, this was malloc'd */
663
664 if (parent_id && parent_id != 0xffffffff)
665 {
666 SIGTYPE (*oldsig)() = (int) signal (SIGINT, SIG_IGN);
667 int status = LIB$ATTACH (&parent_id) & 1;
668 signal (SIGINT, oldsig);
669 return status;
670 }
671 else
672 {
673 struct {
674 int l;
675 char *a;
676 } d_prompt;
677 d_prompt.l = sizeof ("Emacs: "); /* Our special prompt */
678 d_prompt.a = "Emacs: "; /* Just a reminder */
679 LIB$SPAWN (0, 0, 0, 0, 0, 0, 0, 0, 0, 0, &d_prompt, 0);
680 return 1;
681 }
682 return -1;
683 #else
684 #if defined(SIGTSTP) && !defined(MSDOS)
685
686 {
687 int pgrp = EMACS_GETPGRP (0);
688 EMACS_KILLPG (pgrp, SIGTSTP);
689 }
690
691 #else /* No SIGTSTP */
692 #ifdef USG_JOBCTRL /* If you don't know what this is don't mess with it */
693 ptrace (0, 0, 0, 0); /* set for ptrace - caught by csh */
694 kill (getpid (), SIGQUIT);
695
696 #else /* No SIGTSTP or USG_JOBCTRL */
697
698 /* On a system where suspending is not implemented,
699 instead fork a subshell and let it talk directly to the terminal
700 while we wait. */
701 sys_subshell ();
702
703 #endif /* no USG_JOBCTRL */
704 #endif /* no SIGTSTP */
705 #endif /* not VMS */
706 }
707
708 /* Fork a subshell. */
709
710 sys_subshell ()
711 {
712 #ifndef VMS
713 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */
714 int st;
715 char oldwd[MAXPATHLEN+1]; /* Fixed length is safe on MSDOS. */
716 #endif
717 int pid;
718 struct save_signal saved_handlers[5];
719 Lisp_Object dir;
720 unsigned char *str = 0;
721 int len;
722
723 saved_handlers[0].code = SIGINT;
724 saved_handlers[1].code = SIGQUIT;
725 saved_handlers[2].code = SIGTERM;
726 #ifdef SIGIO
727 saved_handlers[3].code = SIGIO;
728 saved_handlers[4].code = 0;
729 #else
730 saved_handlers[3].code = 0;
731 #endif
732
733 /* Mentioning current_buffer->buffer would mean including buffer.h,
734 which somehow wedges the hp compiler. So instead... */
735
736 dir = intern ("default-directory");
737 if (NILP (Fboundp (dir)))
738 goto xyzzy;
739 dir = Fsymbol_value (dir);
740 if (!STRINGP (dir))
741 goto xyzzy;
742
743 dir = expand_and_dir_to_file (Funhandled_file_name_directory (dir), Qnil);
744 str = (unsigned char *) alloca (XSTRING (dir)->size + 2);
745 len = XSTRING (dir)->size;
746 bcopy (XSTRING (dir)->data, str, len);
747 if (str[len - 1] != '/') str[len++] = '/';
748 str[len] = 0;
749 xyzzy:
750
751 #ifdef WINDOWSNT
752 pid = -1;
753 #else /* not WINDOWSNT */
754
755 #ifdef MSDOS
756 pid = 0;
757 #if __DJGPP__ > 1
758 save_signal_handlers (saved_handlers);
759 synch_process_alive = 1;
760 #endif /* __DJGPP__ > 1 */
761 #else
762 pid = vfork ();
763 if (pid == -1)
764 error ("Can't spawn subshell");
765 #endif
766
767 if (pid == 0)
768 #endif /* not WINDOWSNT */
769 {
770 char *sh = 0;
771
772 #ifdef MSDOS /* MW, Aug 1993 */
773 getwd (oldwd);
774 if (sh == 0)
775 sh = (char *) egetenv ("SUSPEND"); /* KFS, 1994-12-14 */
776 #endif
777 if (sh == 0)
778 sh = (char *) egetenv ("SHELL");
779 if (sh == 0)
780 sh = "sh";
781
782 /* Use our buffer's default directory for the subshell. */
783 if (str)
784 chdir (str);
785
786 #ifdef subprocesses
787 close_process_descs (); /* Close Emacs's pipes/ptys */
788 #endif
789
790 #ifdef SET_EMACS_PRIORITY
791 {
792 extern int emacs_priority;
793
794 if (emacs_priority < 0)
795 nice (-emacs_priority);
796 }
797 #endif
798
799 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */
800 st = system (sh);
801 chdir (oldwd);
802 #if 0 /* This is also reported if last command executed in subshell failed, KFS */
803 if (st)
804 report_file_error ("Can't execute subshell", Fcons (build_string (sh), Qnil));
805 #endif
806 #else /* not MSDOS */
807 #ifdef WINDOWSNT
808 /* Waits for process completion */
809 pid = _spawnlp (_P_WAIT, sh, sh, NULL);
810 if (pid == -1)
811 write (1, "Can't execute subshell", 22);
812
813 take_console ();
814 #else /* not WINDOWSNT */
815 execlp (sh, sh, 0);
816 write (1, "Can't execute subshell", 22);
817 _exit (1);
818 #endif /* not WINDOWSNT */
819 #endif /* not MSDOS */
820 }
821
822 /* Do this now if we did not do it before. */
823 #if !defined (MSDOS) || __DJGPP__ == 1
824 save_signal_handlers (saved_handlers);
825 synch_process_alive = 1;
826 #endif
827
828 #ifndef MSDOS
829 wait_for_termination (pid);
830 #endif
831 restore_signal_handlers (saved_handlers);
832 synch_process_alive = 0;
833 #endif /* !VMS */
834 }
835
836 save_signal_handlers (saved_handlers)
837 struct save_signal *saved_handlers;
838 {
839 while (saved_handlers->code)
840 {
841 saved_handlers->handler
842 = (SIGTYPE (*) ()) signal (saved_handlers->code, SIG_IGN);
843 saved_handlers++;
844 }
845 }
846
847 restore_signal_handlers (saved_handlers)
848 struct save_signal *saved_handlers;
849 {
850 while (saved_handlers->code)
851 {
852 signal (saved_handlers->code, saved_handlers->handler);
853 saved_handlers++;
854 }
855 }
856 \f
857 #ifdef F_SETFL
858
859 int old_fcntl_flags;
860
861 init_sigio (fd)
862 int fd;
863 {
864 #ifdef FASYNC
865 old_fcntl_flags = fcntl (fd, F_GETFL, 0) & ~FASYNC;
866 fcntl (fd, F_SETFL, old_fcntl_flags | FASYNC);
867 #endif
868 interrupts_deferred = 0;
869 }
870
871 reset_sigio ()
872 {
873 unrequest_sigio ();
874 }
875
876 #ifdef FASYNC /* F_SETFL does not imply existence of FASYNC */
877
878 request_sigio ()
879 {
880 if (read_socket_hook)
881 return;
882
883 #ifdef SIGWINCH
884 sigunblock (sigmask (SIGWINCH));
885 #endif
886 fcntl (input_fd, F_SETFL, old_fcntl_flags | FASYNC);
887
888 interrupts_deferred = 0;
889 }
890
891 unrequest_sigio ()
892 {
893 if (read_socket_hook)
894 return;
895
896 #ifdef SIGWINCH
897 sigblock (sigmask (SIGWINCH));
898 #endif
899 fcntl (input_fd, F_SETFL, old_fcntl_flags);
900 interrupts_deferred = 1;
901 }
902
903 #else /* no FASYNC */
904 #ifdef STRIDE /* Stride doesn't have FASYNC - use FIOASYNC */
905
906 request_sigio ()
907 {
908 int on = 1;
909
910 if (read_socket_hook)
911 return;
912
913 ioctl (input_fd, FIOASYNC, &on);
914 interrupts_deferred = 0;
915 }
916
917 unrequest_sigio ()
918 {
919 int off = 0;
920
921 if (read_socket_hook)
922 return;
923
924 ioctl (input_fd, FIOASYNC, &off);
925 interrupts_deferred = 1;
926 }
927
928 #else /* not FASYNC, not STRIDE */
929
930 #ifdef _CX_UX
931
932 #include <termios.h>
933
934 request_sigio ()
935 {
936 int on = 1;
937 sigset_t st;
938
939 if (read_socket_hook)
940 return;
941
942 sigemptyset(&st);
943 sigaddset(&st, SIGIO);
944 ioctl (input_fd, FIOASYNC, &on);
945 interrupts_deferred = 0;
946 sigprocmask(SIG_UNBLOCK, &st, (sigset_t *)0);
947 }
948
949 unrequest_sigio ()
950 {
951 int off = 0;
952
953 if (read_socket_hook)
954 return;
955
956 ioctl (input_fd, FIOASYNC, &off);
957 interrupts_deferred = 1;
958 }
959
960 #else /* ! _CX_UX */
961
962 request_sigio ()
963 {
964 if (read_socket_hook)
965 return;
966
967 croak ("request_sigio");
968 }
969
970 unrequest_sigio ()
971 {
972 if (read_socket_hook)
973 return;
974
975 croak ("unrequest_sigio");
976 }
977
978 #endif /* _CX_UX */
979 #endif /* STRIDE */
980 #endif /* FASYNC */
981 #endif /* F_SETFL */
982 \f
983 /* Saving and restoring the process group of Emacs's terminal. */
984
985 #ifdef BSD_PGRPS
986
987 /* The process group of which Emacs was a member when it initially
988 started.
989
990 If Emacs was in its own process group (i.e. inherited_pgroup ==
991 getpid ()), then we know we're running under a shell with job
992 control (Emacs would never be run as part of a pipeline).
993 Everything is fine.
994
995 If Emacs was not in its own process group, then we know we're
996 running under a shell (or a caller) that doesn't know how to
997 separate itself from Emacs (like sh). Emacs must be in its own
998 process group in order to receive SIGIO correctly. In this
999 situation, we put ourselves in our own pgroup, forcibly set the
1000 tty's pgroup to our pgroup, and make sure to restore and reinstate
1001 the tty's pgroup just like any other terminal setting. If
1002 inherited_group was not the tty's pgroup, then we'll get a
1003 SIGTTmumble when we try to change the tty's pgroup, and a CONT if
1004 it goes foreground in the future, which is what should happen. */
1005 int inherited_pgroup;
1006
1007 /* Split off the foreground process group to Emacs alone.
1008 When we are in the foreground, but not started in our own process
1009 group, redirect the TTY to point to our own process group. We need
1010 to be in our own process group to receive SIGIO properly. */
1011 narrow_foreground_group ()
1012 {
1013 int me = getpid ();
1014
1015 setpgrp (0, inherited_pgroup);
1016 if (inherited_pgroup != me)
1017 EMACS_SET_TTY_PGRP (input_fd, &me);
1018 setpgrp (0, me);
1019 }
1020
1021 /* Set the tty to our original foreground group. */
1022 widen_foreground_group ()
1023 {
1024 if (inherited_pgroup != getpid ())
1025 EMACS_SET_TTY_PGRP (input_fd, &inherited_pgroup);
1026 setpgrp (0, inherited_pgroup);
1027 }
1028
1029 #endif /* BSD_PGRPS */
1030 \f
1031 /* Getting and setting emacs_tty structures. */
1032
1033 /* Set *TC to the parameters associated with the terminal FD.
1034 Return zero if all's well, or -1 if we ran into an error we
1035 couldn't deal with. */
1036 int
1037 emacs_get_tty (fd, settings)
1038 int fd;
1039 struct emacs_tty *settings;
1040 {
1041 /* Retrieve the primary parameters - baud rate, character size, etcetera. */
1042 #ifdef HAVE_TCATTR
1043 /* We have those nifty POSIX tcmumbleattr functions. */
1044 if (tcgetattr (fd, &settings->main) < 0)
1045 return -1;
1046
1047 #else
1048 #ifdef HAVE_TERMIO
1049 /* The SYSV-style interface? */
1050 if (ioctl (fd, TCGETA, &settings->main) < 0)
1051 return -1;
1052
1053 #else
1054 #ifdef VMS
1055 /* Vehemently Monstrous System? :-) */
1056 if (! (SYS$QIOW (0, fd, IO$_SENSEMODE, settings, 0, 0,
1057 &settings->main.class, 12, 0, 0, 0, 0)
1058 & 1))
1059 return -1;
1060
1061 #else
1062 #ifndef DOS_NT
1063 /* I give up - I hope you have the BSD ioctls. */
1064 if (ioctl (fd, TIOCGETP, &settings->main) < 0)
1065 return -1;
1066 #endif /* not DOS_NT */
1067 #endif
1068 #endif
1069 #endif
1070
1071 /* Suivant - Do we have to get struct ltchars data? */
1072 #ifdef HAVE_LTCHARS
1073 if (ioctl (fd, TIOCGLTC, &settings->ltchars) < 0)
1074 return -1;
1075 #endif
1076
1077 /* How about a struct tchars and a wordful of lmode bits? */
1078 #ifdef HAVE_TCHARS
1079 if (ioctl (fd, TIOCGETC, &settings->tchars) < 0
1080 || ioctl (fd, TIOCLGET, &settings->lmode) < 0)
1081 return -1;
1082 #endif
1083
1084 /* We have survived the tempest. */
1085 return 0;
1086 }
1087
1088
1089 /* Set the parameters of the tty on FD according to the contents of
1090 *SETTINGS. If FLUSHP is non-zero, we discard input.
1091 Return 0 if all went well, and -1 if anything failed. */
1092
1093 int
1094 emacs_set_tty (fd, settings, flushp)
1095 int fd;
1096 struct emacs_tty *settings;
1097 int flushp;
1098 {
1099 /* Set the primary parameters - baud rate, character size, etcetera. */
1100 #ifdef HAVE_TCATTR
1101 int i;
1102 /* We have those nifty POSIX tcmumbleattr functions.
1103 William J. Smith <wjs@wiis.wang.com> writes:
1104 "POSIX 1003.1 defines tcsetattr() to return success if it was
1105 able to perform any of the requested actions, even if some
1106 of the requested actions could not be performed.
1107 We must read settings back to ensure tty setup properly.
1108 AIX requires this to keep tty from hanging occasionally." */
1109 /* This make sure that we don't loop indefinitely in here. */
1110 for (i = 0 ; i < 10 ; i++)
1111 if (tcsetattr (fd, flushp ? TCSAFLUSH : TCSADRAIN, &settings->main) < 0)
1112 {
1113 if (errno == EINTR)
1114 continue;
1115 else
1116 return -1;
1117 }
1118 else
1119 {
1120 struct termios new;
1121
1122 /* Get the current settings, and see if they're what we asked for. */
1123 tcgetattr (fd, &new);
1124 /* We cannot use memcmp on the whole structure here because under
1125 * aix386 the termios structure has some reserved field that may
1126 * not be filled in.
1127 */
1128 if ( new.c_iflag == settings->main.c_iflag
1129 && new.c_oflag == settings->main.c_oflag
1130 && new.c_cflag == settings->main.c_cflag
1131 && new.c_lflag == settings->main.c_lflag
1132 && memcmp(new.c_cc, settings->main.c_cc, NCCS) == 0)
1133 break;
1134 else
1135 continue;
1136 }
1137
1138 #else
1139 #ifdef HAVE_TERMIO
1140 /* The SYSV-style interface? */
1141 if (ioctl (fd, flushp ? TCSETAF : TCSETAW, &settings->main) < 0)
1142 return -1;
1143
1144 #else
1145 #ifdef VMS
1146 /* Vehemently Monstrous System? :-) */
1147 if (! (SYS$QIOW (0, fd, IO$_SETMODE, &input_iosb, 0, 0,
1148 &settings->main.class, 12, 0, 0, 0, 0)
1149 & 1))
1150 return -1;
1151
1152 #else
1153 #ifndef DOS_NT
1154 /* I give up - I hope you have the BSD ioctls. */
1155 if (ioctl (fd, (flushp) ? TIOCSETP : TIOCSETN, &settings->main) < 0)
1156 return -1;
1157 #endif /* not DOS_NT */
1158
1159 #endif
1160 #endif
1161 #endif
1162
1163 /* Suivant - Do we have to get struct ltchars data? */
1164 #ifdef HAVE_LTCHARS
1165 if (ioctl (fd, TIOCSLTC, &settings->ltchars) < 0)
1166 return -1;
1167 #endif
1168
1169 /* How about a struct tchars and a wordful of lmode bits? */
1170 #ifdef HAVE_TCHARS
1171 if (ioctl (fd, TIOCSETC, &settings->tchars) < 0
1172 || ioctl (fd, TIOCLSET, &settings->lmode) < 0)
1173 return -1;
1174 #endif
1175
1176 /* We have survived the tempest. */
1177 return 0;
1178 }
1179
1180 \f
1181 /* The initial tty mode bits */
1182 struct emacs_tty old_tty;
1183
1184 /* 1 if we have been through init_sys_modes. */
1185 int term_initted;
1186
1187 /* 1 if outer tty status has been recorded. */
1188 int old_tty_valid;
1189
1190 #ifdef BSD4_1
1191 /* BSD 4.1 needs to keep track of the lmode bits in order to start
1192 sigio. */
1193 int lmode;
1194 #endif
1195
1196 #ifndef F_SETOWN_BUG
1197 #ifdef F_SETOWN
1198 int old_fcntl_owner;
1199 #endif /* F_SETOWN */
1200 #endif /* F_SETOWN_BUG */
1201
1202 /* This may also be defined in stdio,
1203 but if so, this does no harm,
1204 and using the same name avoids wasting the other one's space. */
1205
1206 #if defined (USG) || defined (DGUX)
1207 unsigned char _sobuf[BUFSIZ+8];
1208 #else
1209 char _sobuf[BUFSIZ];
1210 #endif
1211
1212 #ifdef HAVE_LTCHARS
1213 static struct ltchars new_ltchars = {-1,-1,-1,-1,-1,-1};
1214 #endif
1215 #ifdef HAVE_TCHARS
1216 static struct tchars new_tchars = {-1,-1,-1,-1,-1,-1};
1217 #endif
1218
1219 init_sys_modes ()
1220 {
1221 struct emacs_tty tty;
1222
1223 #ifdef VMS
1224 #if 0
1225 static int oob_chars[2] = {0, 1 << 7}; /* catch C-g's */
1226 extern int (*interrupt_signal) ();
1227 #endif
1228 #endif
1229
1230 Vtty_erase_char = Qnil;
1231
1232 if (noninteractive)
1233 return;
1234
1235 #ifdef VMS
1236 if (!input_ef)
1237 input_ef = get_kbd_event_flag ();
1238 /* LIB$GET_EF (&input_ef); */
1239 SYS$CLREF (input_ef);
1240 waiting_for_ast = 0;
1241 if (!timer_ef)
1242 timer_ef = get_timer_event_flag ();
1243 /* LIB$GET_EF (&timer_ef); */
1244 SYS$CLREF (timer_ef);
1245 #if 0
1246 if (!process_ef)
1247 {
1248 LIB$GET_EF (&process_ef);
1249 SYS$CLREF (process_ef);
1250 }
1251 if (input_ef / 32 != process_ef / 32)
1252 croak ("Input and process event flags in different clusters.");
1253 #endif
1254 if (input_ef / 32 != timer_ef / 32)
1255 croak ("Input and timer event flags in different clusters.");
1256 #if 0
1257 input_eflist = ((unsigned) 1 << (input_ef % 32)) |
1258 ((unsigned) 1 << (process_ef % 32));
1259 #endif
1260 timer_eflist = ((unsigned) 1 << (input_ef % 32)) |
1261 ((unsigned) 1 << (timer_ef % 32));
1262 #ifndef VMS4_4
1263 sys_access_reinit ();
1264 #endif
1265 #endif /* not VMS */
1266
1267 #ifdef BSD_PGRPS
1268 if (! read_socket_hook && EQ (Vwindow_system, Qnil))
1269 narrow_foreground_group ();
1270 #endif
1271
1272 #ifdef HAVE_WINDOW_SYSTEM
1273 /* Emacs' window system on MSDOG uses the `internal terminal' and therefore
1274 needs the initialization code below. */
1275 if (!read_socket_hook && EQ (Vwindow_system, Qnil))
1276 #endif
1277 {
1278 EMACS_GET_TTY (input_fd, &old_tty);
1279
1280 old_tty_valid = 1;
1281
1282 tty = old_tty;
1283
1284 #if defined (HAVE_TERMIO) || defined (HAVE_TERMIOS)
1285 XSETINT (Vtty_erase_char, old_tty.main.c_cc[VERASE]);
1286
1287 #ifdef DGUX
1288 /* This allows meta to be sent on 8th bit. */
1289 tty.main.c_iflag &= ~INPCK; /* don't check input for parity */
1290 #endif
1291 tty.main.c_iflag |= (IGNBRK); /* Ignore break condition */
1292 tty.main.c_iflag &= ~ICRNL; /* Disable map of CR to NL on input */
1293 #ifdef INLCR /* I'm just being cautious,
1294 since I can't check how widespread INLCR is--rms. */
1295 tty.main.c_iflag &= ~INLCR; /* Disable map of NL to CR on input */
1296 #endif
1297 #ifdef ISTRIP
1298 tty.main.c_iflag &= ~ISTRIP; /* don't strip 8th bit on input */
1299 #endif
1300 tty.main.c_lflag &= ~ECHO; /* Disable echo */
1301 tty.main.c_lflag &= ~ICANON; /* Disable erase/kill processing */
1302 #ifdef IEXTEN
1303 tty.main.c_lflag &= ~IEXTEN; /* Disable other editing characters. */
1304 #endif
1305 tty.main.c_lflag |= ISIG; /* Enable signals */
1306 if (flow_control)
1307 {
1308 tty.main.c_iflag |= IXON; /* Enable start/stop output control */
1309 #ifdef IXANY
1310 tty.main.c_iflag &= ~IXANY;
1311 #endif /* IXANY */
1312 }
1313 else
1314 tty.main.c_iflag &= ~IXON; /* Disable start/stop output control */
1315 tty.main.c_oflag &= ~ONLCR; /* Disable map of NL to CR-NL
1316 on output */
1317 tty.main.c_oflag &= ~TAB3; /* Disable tab expansion */
1318 #ifdef CS8
1319 if (meta_key)
1320 {
1321 tty.main.c_cflag |= CS8; /* allow 8th bit on input */
1322 tty.main.c_cflag &= ~PARENB;/* Don't check parity */
1323 }
1324 #endif
1325 tty.main.c_cc[VINTR] = quit_char; /* C-g (usually) gives SIGINT */
1326 /* Set up C-g for both SIGQUIT and SIGINT.
1327 We don't know which we will get, but we handle both alike
1328 so which one it really gives us does not matter. */
1329 tty.main.c_cc[VQUIT] = quit_char;
1330 tty.main.c_cc[VMIN] = 1; /* Input should wait for at least 1 char */
1331 tty.main.c_cc[VTIME] = 0; /* no matter how long that takes. */
1332 #ifdef VSWTCH
1333 tty.main.c_cc[VSWTCH] = CDISABLE; /* Turn off shell layering use
1334 of C-z */
1335 #endif /* VSWTCH */
1336 #if defined (mips) || defined (HAVE_TCATTR)
1337 #ifdef VSUSP
1338 tty.main.c_cc[VSUSP] = CDISABLE; /* Turn off mips handling of C-z. */
1339 #endif /* VSUSP */
1340 #ifdef V_DSUSP
1341 tty.main.c_cc[V_DSUSP] = CDISABLE; /* Turn off mips handling of C-y. */
1342 #endif /* V_DSUSP */
1343 #ifdef VDSUSP /* Some systems have VDSUSP, some have V_DSUSP. */
1344 tty.main.c_cc[VDSUSP] = CDISABLE;
1345 #endif /* VDSUSP */
1346 #ifdef VLNEXT
1347 tty.main.c_cc[VLNEXT] = CDISABLE;
1348 #endif /* VLNEXT */
1349 #ifdef VREPRINT
1350 tty.main.c_cc[VREPRINT] = CDISABLE;
1351 #endif /* VREPRINT */
1352 #ifdef VWERASE
1353 tty.main.c_cc[VWERASE] = CDISABLE;
1354 #endif /* VWERASE */
1355 #ifdef VDISCARD
1356 tty.main.c_cc[VDISCARD] = CDISABLE;
1357 #endif /* VDISCARD */
1358 #ifdef VSTART
1359 tty.main.c_cc[VSTART] = CDISABLE;
1360 #endif /* VSTART */
1361 #ifdef VSTOP
1362 tty.main.c_cc[VSTOP] = CDISABLE;
1363 #endif /* VSTOP */
1364 #endif /* mips or HAVE_TCATTR */
1365 #ifdef SET_LINE_DISCIPLINE
1366 /* Need to explicitly request TERMIODISC line discipline or
1367 Ultrix's termios does not work correctly. */
1368 tty.main.c_line = SET_LINE_DISCIPLINE;
1369 #endif
1370 #ifdef AIX
1371 #ifndef IBMR2AIX
1372 /* AIX enhanced edit loses NULs, so disable it. */
1373 tty.main.c_line = 0;
1374 tty.main.c_iflag &= ~ASCEDIT;
1375 #else
1376 tty.main.c_cc[VSTRT] = 255;
1377 tty.main.c_cc[VSTOP] = 255;
1378 tty.main.c_cc[VSUSP] = 255;
1379 tty.main.c_cc[VDSUSP] = 255;
1380 #endif /* IBMR2AIX */
1381 if (flow_control)
1382 {
1383 #ifdef VSTART
1384 tty.main.c_cc[VSTART] = '\021';
1385 #endif /* VSTART */
1386 #ifdef VSTOP
1387 tty.main.c_cc[VSTOP] = '\023';
1388 #endif /* VSTOP */
1389 }
1390 /* Also, PTY overloads NUL and BREAK.
1391 don't ignore break, but don't signal either, so it looks like NUL.
1392 This really serves a purpose only if running in an XTERM window
1393 or via TELNET or the like, but does no harm elsewhere. */
1394 tty.main.c_iflag &= ~IGNBRK;
1395 tty.main.c_iflag &= ~BRKINT;
1396 #endif
1397 #else /* if not HAVE_TERMIO */
1398 #ifdef VMS
1399 tty.main.tt_char |= TT$M_NOECHO;
1400 if (meta_key)
1401 tty.main.tt_char |= TT$M_EIGHTBIT;
1402 if (flow_control)
1403 tty.main.tt_char |= TT$M_TTSYNC;
1404 else
1405 tty.main.tt_char &= ~TT$M_TTSYNC;
1406 tty.main.tt2_char |= TT2$M_PASTHRU | TT2$M_XON;
1407 #else /* not VMS (BSD, that is) */
1408 #ifndef DOS_NT
1409 Vtty_erase_char = tty.main.sg_erase;
1410 tty.main.sg_flags &= ~(ECHO | CRMOD | XTABS);
1411 if (meta_key)
1412 tty.main.sg_flags |= ANYP;
1413 tty.main.sg_flags |= interrupt_input ? RAW : CBREAK;
1414 #endif /* not DOS_NT */
1415 #endif /* not VMS (BSD, that is) */
1416 #endif /* not HAVE_TERMIO */
1417
1418 /* If going to use CBREAK mode, we must request C-g to interrupt
1419 and turn off start and stop chars, etc. If not going to use
1420 CBREAK mode, do this anyway so as to turn off local flow
1421 control for user coming over network on 4.2; in this case,
1422 only t_stopc and t_startc really matter. */
1423 #ifndef HAVE_TERMIO
1424 #ifdef HAVE_TCHARS
1425 /* Note: if not using CBREAK mode, it makes no difference how we
1426 set this */
1427 tty.tchars = new_tchars;
1428 tty.tchars.t_intrc = quit_char;
1429 if (flow_control)
1430 {
1431 tty.tchars.t_startc = '\021';
1432 tty.tchars.t_stopc = '\023';
1433 }
1434
1435 tty.lmode = LDECCTQ | LLITOUT | LPASS8 | LNOFLSH | old_tty.lmode;
1436 #ifdef ultrix
1437 /* Under Ultrix 4.2a, leaving this out doesn't seem to hurt
1438 anything, and leaving it in breaks the meta key. Go figure. */
1439 tty.lmode &= ~LLITOUT;
1440 #endif
1441
1442 #ifdef BSD4_1
1443 lmode = tty.lmode;
1444 #endif
1445
1446 #endif /* HAVE_TCHARS */
1447 #endif /* not HAVE_TERMIO */
1448
1449 #ifdef HAVE_LTCHARS
1450 tty.ltchars = new_ltchars;
1451 #endif /* HAVE_LTCHARS */
1452 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida, MW Aug 1993 */
1453 if (!term_initted)
1454 internal_terminal_init ();
1455 dos_ttraw ();
1456 #endif
1457
1458 EMACS_SET_TTY (input_fd, &tty, 0);
1459
1460 /* This code added to insure that, if flow-control is not to be used,
1461 we have an unlocked terminal at the start. */
1462
1463 #ifdef TCXONC
1464 if (!flow_control) ioctl (input_fd, TCXONC, 1);
1465 #endif
1466 #ifndef APOLLO
1467 #ifdef TIOCSTART
1468 if (!flow_control) ioctl (input_fd, TIOCSTART, 0);
1469 #endif
1470 #endif
1471
1472 #if defined (HAVE_TERMIOS) || defined (HPUX9)
1473 #ifdef TCOON
1474 if (!flow_control) tcflow (input_fd, TCOON);
1475 #endif
1476 #endif
1477
1478 #ifdef AIXHFT
1479 hft_init ();
1480 #ifdef IBMR2AIX
1481 {
1482 /* IBM's HFT device usually thinks a ^J should be LF/CR. We need it
1483 to be only LF. This is the way that is done. */
1484 struct termio tty;
1485
1486 if (ioctl (1, HFTGETID, &tty) != -1)
1487 write (1, "\033[20l", 5);
1488 }
1489 #endif
1490 #endif /* AIXHFT */
1491
1492 #ifdef VMS
1493 /* Appears to do nothing when in PASTHRU mode.
1494 SYS$QIOW (0, input_fd, IO$_SETMODE|IO$M_OUTBAND, 0, 0, 0,
1495 interrupt_signal, oob_chars, 0, 0, 0, 0);
1496 */
1497 queue_kbd_input (0);
1498 #endif /* VMS */
1499 }
1500
1501 #ifdef F_SETFL
1502 #ifndef F_SETOWN_BUG
1503 #ifdef F_GETOWN /* F_SETFL does not imply existence of F_GETOWN */
1504 if (interrupt_input
1505 && ! read_socket_hook && EQ (Vwindow_system, Qnil))
1506 {
1507 old_fcntl_owner = fcntl (input_fd, F_GETOWN, 0);
1508 fcntl (input_fd, F_SETOWN, getpid ());
1509 init_sigio (input_fd);
1510 }
1511 #endif /* F_GETOWN */
1512 #endif /* F_SETOWN_BUG */
1513 #endif /* F_SETFL */
1514
1515 #ifdef BSD4_1
1516 if (interrupt_input)
1517 init_sigio (input_fd);
1518 #endif
1519
1520 #ifdef VMS /* VMS sometimes has this symbol but lacks setvbuf. */
1521 #undef _IOFBF
1522 #endif
1523 #ifdef _IOFBF
1524 /* This symbol is defined on recent USG systems.
1525 Someone says without this call USG won't really buffer the file
1526 even with a call to setbuf. */
1527 setvbuf (stdout, _sobuf, _IOFBF, sizeof _sobuf);
1528 #else
1529 setbuf (stdout, _sobuf);
1530 #endif
1531 #ifdef HAVE_WINDOW_SYSTEM
1532 /* Emacs' window system on MSDOG uses the `internal terminal' and therefore
1533 needs the initialization code below. */
1534 if (! read_socket_hook && EQ (Vwindow_system, Qnil))
1535 #endif
1536 set_terminal_modes ();
1537
1538 if (term_initted && no_redraw_on_reenter)
1539 {
1540 if (display_completed)
1541 direct_output_forward_char (0);
1542 }
1543 else
1544 {
1545 frame_garbaged = 1;
1546 if (FRAMEP (Vterminal_frame))
1547 FRAME_GARBAGED_P (XFRAME (Vterminal_frame)) = 1;
1548 }
1549
1550 term_initted = 1;
1551 }
1552
1553 /* Return nonzero if safe to use tabs in output.
1554 At the time this is called, init_sys_modes has not been done yet. */
1555
1556 tabs_safe_p ()
1557 {
1558 struct emacs_tty tty;
1559
1560 EMACS_GET_TTY (input_fd, &tty);
1561 return EMACS_TTY_TABS_OK (&tty);
1562 }
1563 \f
1564 /* Get terminal size from system.
1565 Store number of lines into *HEIGHTP and width into *WIDTHP.
1566 We store 0 if there's no valid information. */
1567
1568 get_frame_size (widthp, heightp)
1569 int *widthp, *heightp;
1570 {
1571
1572 #ifdef TIOCGWINSZ
1573
1574 /* BSD-style. */
1575 struct winsize size;
1576
1577 if (ioctl (input_fd, TIOCGWINSZ, &size) == -1)
1578 *widthp = *heightp = 0;
1579 else
1580 {
1581 *widthp = size.ws_col;
1582 *heightp = size.ws_row;
1583 }
1584
1585 #else
1586 #ifdef TIOCGSIZE
1587
1588 /* SunOS - style. */
1589 struct ttysize size;
1590
1591 if (ioctl (input_fd, TIOCGSIZE, &size) == -1)
1592 *widthp = *heightp = 0;
1593 else
1594 {
1595 *widthp = size.ts_cols;
1596 *heightp = size.ts_lines;
1597 }
1598
1599 #else
1600 #ifdef VMS
1601
1602 struct sensemode tty;
1603
1604 SYS$QIOW (0, input_fd, IO$_SENSEMODE, &tty, 0, 0,
1605 &tty.class, 12, 0, 0, 0, 0);
1606 *widthp = tty.scr_wid;
1607 *heightp = tty.scr_len;
1608
1609 #else
1610 #ifdef MSDOS
1611 *widthp = ScreenCols ();
1612 *heightp = ScreenRows ();
1613 #else /* system doesn't know size */
1614 *widthp = 0;
1615 *heightp = 0;
1616 #endif
1617
1618 #endif /* not VMS */
1619 #endif /* not SunOS-style */
1620 #endif /* not BSD-style */
1621 }
1622
1623 /* Set the logical window size associated with descriptor FD
1624 to HEIGHT and WIDTH. This is used mainly with ptys. */
1625
1626 int
1627 set_window_size (fd, height, width)
1628 int fd, height, width;
1629 {
1630 #ifdef TIOCSWINSZ
1631
1632 /* BSD-style. */
1633 struct winsize size;
1634 size.ws_row = height;
1635 size.ws_col = width;
1636
1637 if (ioctl (fd, TIOCSWINSZ, &size) == -1)
1638 return 0; /* error */
1639 else
1640 return 1;
1641
1642 #else
1643 #ifdef TIOCSSIZE
1644
1645 /* SunOS - style. */
1646 struct ttysize size;
1647 size.ts_lines = height;
1648 size.ts_cols = width;
1649
1650 if (ioctl (fd, TIOCGSIZE, &size) == -1)
1651 return 0;
1652 else
1653 return 1;
1654 #else
1655 return -1;
1656 #endif /* not SunOS-style */
1657 #endif /* not BSD-style */
1658 }
1659
1660 \f
1661 /* Prepare the terminal for exiting Emacs; move the cursor to the
1662 bottom of the frame, turn off interrupt-driven I/O, etc. */
1663 reset_sys_modes ()
1664 {
1665 if (noninteractive)
1666 {
1667 fflush (stdout);
1668 return;
1669 }
1670 if (!term_initted)
1671 return;
1672 #ifdef HAVE_WINDOW_SYSTEM
1673 /* Emacs' window system on MSDOG uses the `internal terminal' and therefore
1674 needs the clean-up code below. */
1675 if (read_socket_hook || !EQ (Vwindow_system, Qnil))
1676 return;
1677 #endif
1678 cursor_to (FRAME_HEIGHT (selected_frame) - 1, 0);
1679 clear_end_of_line (FRAME_WIDTH (selected_frame));
1680 /* clear_end_of_line may move the cursor */
1681 cursor_to (FRAME_HEIGHT (selected_frame) - 1, 0);
1682 #if defined (IBMR2AIX) && defined (AIXHFT)
1683 {
1684 /* HFT devices normally use ^J as a LF/CR. We forced it to
1685 do the LF only. Now, we need to reset it. */
1686 struct termio tty;
1687
1688 if (ioctl (1, HFTGETID, &tty) != -1)
1689 write (1, "\033[20h", 5);
1690 }
1691 #endif
1692
1693 reset_terminal_modes ();
1694 fflush (stdout);
1695 #ifdef BSD_SYSTEM
1696 #ifndef BSD4_1
1697 /* Avoid possible loss of output when changing terminal modes. */
1698 fsync (fileno (stdout));
1699 #endif
1700 #endif
1701
1702 #ifdef F_SETFL
1703 #ifndef F_SETOWN_BUG
1704 #ifdef F_SETOWN /* F_SETFL does not imply existence of F_SETOWN */
1705 if (interrupt_input)
1706 {
1707 reset_sigio ();
1708 fcntl (input_fd, F_SETOWN, old_fcntl_owner);
1709 }
1710 #endif /* F_SETOWN */
1711 #endif /* F_SETOWN_BUG */
1712 #ifdef O_NDELAY
1713 fcntl (input_fd, F_SETFL, fcntl (input_fd, F_GETFL, 0) & ~O_NDELAY);
1714 #endif
1715 #endif /* F_SETFL */
1716 #ifdef BSD4_1
1717 if (interrupt_input)
1718 reset_sigio ();
1719 #endif /* BSD4_1 */
1720
1721 if (old_tty_valid)
1722 while (EMACS_SET_TTY (input_fd, &old_tty, 0) < 0 && errno == EINTR)
1723 ;
1724
1725 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */
1726 dos_ttcooked ();
1727 #endif
1728
1729 #ifdef SET_LINE_DISCIPLINE
1730 /* Ultrix's termios *ignores* any line discipline except TERMIODISC.
1731 A different old line discipline is therefore not restored, yet.
1732 Restore the old line discipline by hand. */
1733 ioctl (0, TIOCSETD, &old_tty.main.c_line);
1734 #endif
1735
1736 #ifdef AIXHFT
1737 hft_reset ();
1738 #endif
1739
1740 #ifdef BSD_PGRPS
1741 widen_foreground_group ();
1742 #endif
1743 }
1744 \f
1745 #ifdef HAVE_PTYS
1746
1747 /* Set up the proper status flags for use of a pty. */
1748
1749 setup_pty (fd)
1750 int fd;
1751 {
1752 /* I'm told that TOICREMOTE does not mean control chars
1753 "can't be sent" but rather that they don't have
1754 input-editing or signaling effects.
1755 That should be good, because we have other ways
1756 to do those things in Emacs.
1757 However, telnet mode seems not to work on 4.2.
1758 So TIOCREMOTE is turned off now. */
1759
1760 /* Under hp-ux, if TIOCREMOTE is turned on, some calls
1761 will hang. In particular, the "timeout" feature (which
1762 causes a read to return if there is no data available)
1763 does this. Also it is known that telnet mode will hang
1764 in such a way that Emacs must be stopped (perhaps this
1765 is the same problem).
1766
1767 If TIOCREMOTE is turned off, then there is a bug in
1768 hp-ux which sometimes loses data. Apparently the
1769 code which blocks the master process when the internal
1770 buffer fills up does not work. Other than this,
1771 though, everything else seems to work fine.
1772
1773 Since the latter lossage is more benign, we may as well
1774 lose that way. -- cph */
1775 #ifdef FIONBIO
1776 #ifdef SYSV_PTYS
1777 {
1778 int on = 1;
1779 ioctl (fd, FIONBIO, &on);
1780 }
1781 #endif
1782 #endif
1783 #ifdef IBMRTAIX
1784 /* On AIX, the parent gets SIGHUP when a pty attached child dies. So, we */
1785 /* ignore SIGHUP once we've started a child on a pty. Note that this may */
1786 /* cause EMACS not to die when it should, i.e., when its own controlling */
1787 /* tty goes away. I've complained to the AIX developers, and they may */
1788 /* change this behavior, but I'm not going to hold my breath. */
1789 signal (SIGHUP, SIG_IGN);
1790 #endif
1791 }
1792 #endif /* HAVE_PTYS */
1793 \f
1794 #ifdef VMS
1795
1796 /* Assigning an input channel is done at the start of Emacs execution.
1797 This is called each time Emacs is resumed, also, but does nothing
1798 because input_chain is no longer zero. */
1799
1800 init_vms_input ()
1801 {
1802 int status;
1803
1804 if (input_fd == 0)
1805 {
1806 status = SYS$ASSIGN (&input_dsc, &input_fd, 0, 0);
1807 if (! (status & 1))
1808 LIB$STOP (status);
1809 }
1810 }
1811
1812 /* Deassigning the input channel is done before exiting. */
1813
1814 stop_vms_input ()
1815 {
1816 return SYS$DASSGN (input_fd);
1817 }
1818
1819 short input_buffer;
1820
1821 /* Request reading one character into the keyboard buffer.
1822 This is done as soon as the buffer becomes empty. */
1823
1824 queue_kbd_input ()
1825 {
1826 int status;
1827 extern kbd_input_ast ();
1828
1829 waiting_for_ast = 0;
1830 stop_input = 0;
1831 status = SYS$QIO (0, input_fd, IO$_READVBLK,
1832 &input_iosb, kbd_input_ast, 1,
1833 &input_buffer, 1, 0, terminator_mask, 0, 0);
1834 }
1835
1836 int input_count;
1837
1838 /* Ast routine that is called when keyboard input comes in
1839 in accord with the SYS$QIO above. */
1840
1841 kbd_input_ast ()
1842 {
1843 register int c = -1;
1844 int old_errno = errno;
1845 extern EMACS_TIME *input_available_clear_time;
1846
1847 if (waiting_for_ast)
1848 SYS$SETEF (input_ef);
1849 waiting_for_ast = 0;
1850 input_count++;
1851 #ifdef ASTDEBUG
1852 if (input_count == 25)
1853 exit (1);
1854 printf ("Ast # %d,", input_count);
1855 printf (" iosb = %x, %x, %x, %x",
1856 input_iosb.offset, input_iosb.status, input_iosb.termlen,
1857 input_iosb.term);
1858 #endif
1859 if (input_iosb.offset)
1860 {
1861 c = input_buffer;
1862 #ifdef ASTDEBUG
1863 printf (", char = 0%o", c);
1864 #endif
1865 }
1866 #ifdef ASTDEBUG
1867 printf ("\n");
1868 fflush (stdout);
1869 sleep (1);
1870 #endif
1871 if (! stop_input)
1872 queue_kbd_input ();
1873 if (c >= 0)
1874 {
1875 struct input_event e;
1876 e.kind = ascii_keystroke;
1877 XSETINT (e.code, c);
1878 XSETFRAME (e.frame_or_window, selected_frame);
1879 kbd_buffer_store_event (&e);
1880 }
1881 if (input_available_clear_time)
1882 EMACS_SET_SECS_USECS (*input_available_clear_time, 0, 0);
1883 errno = old_errno;
1884 }
1885
1886 /* Wait until there is something in kbd_buffer. */
1887
1888 wait_for_kbd_input ()
1889 {
1890 extern int have_process_input, process_exited;
1891
1892 /* If already something, avoid doing system calls. */
1893 if (detect_input_pending ())
1894 {
1895 return;
1896 }
1897 /* Clear a flag, and tell ast routine above to set it. */
1898 SYS$CLREF (input_ef);
1899 waiting_for_ast = 1;
1900 /* Check for timing error: ast happened while we were doing that. */
1901 if (!detect_input_pending ())
1902 {
1903 /* No timing error: wait for flag to be set. */
1904 set_waiting_for_input (0);
1905 SYS$WFLOR (input_ef, input_eflist);
1906 clear_waiting_for_input (0);
1907 if (!detect_input_pending ())
1908 /* Check for subprocess input availability */
1909 {
1910 int dsp = have_process_input || process_exited;
1911
1912 SYS$CLREF (process_ef);
1913 if (have_process_input)
1914 process_command_input ();
1915 if (process_exited)
1916 process_exit ();
1917 if (dsp)
1918 {
1919 update_mode_lines++;
1920 prepare_menu_bars ();
1921 redisplay_preserve_echo_area ();
1922 }
1923 }
1924 }
1925 waiting_for_ast = 0;
1926 }
1927
1928 /* Get rid of any pending QIO, when we are about to suspend
1929 or when we want to throw away pending input.
1930 We wait for a positive sign that the AST routine has run
1931 and therefore there is no I/O request queued when we return.
1932 SYS$SETAST is used to avoid a timing error. */
1933
1934 end_kbd_input ()
1935 {
1936 #ifdef ASTDEBUG
1937 printf ("At end_kbd_input.\n");
1938 fflush (stdout);
1939 sleep (1);
1940 #endif
1941 if (LIB$AST_IN_PROG ()) /* Don't wait if suspending from kbd_buffer_store_event! */
1942 {
1943 SYS$CANCEL (input_fd);
1944 return;
1945 }
1946
1947 SYS$SETAST (0);
1948 /* Clear a flag, and tell ast routine above to set it. */
1949 SYS$CLREF (input_ef);
1950 waiting_for_ast = 1;
1951 stop_input = 1;
1952 SYS$CANCEL (input_fd);
1953 SYS$SETAST (1);
1954 SYS$WAITFR (input_ef);
1955 waiting_for_ast = 0;
1956 }
1957
1958 /* Wait for either input available or time interval expiry. */
1959
1960 input_wait_timeout (timeval)
1961 int timeval; /* Time to wait, in seconds */
1962 {
1963 int time [2];
1964 static int zero = 0;
1965 static int large = -10000000;
1966
1967 LIB$EMUL (&timeval, &large, &zero, time); /* Convert to VMS format */
1968
1969 /* If already something, avoid doing system calls. */
1970 if (detect_input_pending ())
1971 {
1972 return;
1973 }
1974 /* Clear a flag, and tell ast routine above to set it. */
1975 SYS$CLREF (input_ef);
1976 waiting_for_ast = 1;
1977 /* Check for timing error: ast happened while we were doing that. */
1978 if (!detect_input_pending ())
1979 {
1980 /* No timing error: wait for flag to be set. */
1981 SYS$CANTIM (1, 0);
1982 if (SYS$SETIMR (timer_ef, time, 0, 1) & 1) /* Set timer */
1983 SYS$WFLOR (timer_ef, timer_eflist); /* Wait for timer expiry or input */
1984 }
1985 waiting_for_ast = 0;
1986 }
1987
1988 /* The standard `sleep' routine works some other way
1989 and it stops working if you have ever quit out of it.
1990 This one continues to work. */
1991
1992 sys_sleep (timeval)
1993 int timeval;
1994 {
1995 int time [2];
1996 static int zero = 0;
1997 static int large = -10000000;
1998
1999 LIB$EMUL (&timeval, &large, &zero, time); /* Convert to VMS format */
2000
2001 SYS$CANTIM (1, 0);
2002 if (SYS$SETIMR (timer_ef, time, 0, 1) & 1) /* Set timer */
2003 SYS$WAITFR (timer_ef); /* Wait for timer expiry only */
2004 }
2005
2006 init_sigio (fd)
2007 int fd;
2008 {
2009 request_sigio ();
2010 }
2011
2012 reset_sigio ()
2013 {
2014 unrequest_sigio ();
2015 }
2016
2017 request_sigio ()
2018 {
2019 croak ("request sigio");
2020 }
2021
2022 unrequest_sigio ()
2023 {
2024 croak ("unrequest sigio");
2025 }
2026
2027 #endif /* VMS */
2028 \f
2029 /* Note that VMS compiler won't accept defined (CANNOT_DUMP). */
2030 #ifndef CANNOT_DUMP
2031 #define NEED_STARTS
2032 #endif
2033
2034 #ifndef SYSTEM_MALLOC
2035 #ifndef NEED_STARTS
2036 #define NEED_STARTS
2037 #endif
2038 #endif
2039
2040 #ifdef NEED_STARTS
2041 /* Some systems that cannot dump also cannot implement these. */
2042
2043 /*
2044 * Return the address of the start of the text segment prior to
2045 * doing an unexec. After unexec the return value is undefined.
2046 * See crt0.c for further explanation and _start.
2047 *
2048 */
2049
2050 #ifndef HAVE_TEXT_START
2051 char *
2052 start_of_text ()
2053 {
2054 #ifdef TEXT_START
2055 return ((char *) TEXT_START);
2056 #else
2057 #ifdef GOULD
2058 extern csrt ();
2059 return ((char *) csrt);
2060 #else /* not GOULD */
2061 extern int _start ();
2062 return ((char *) _start);
2063 #endif /* GOULD */
2064 #endif /* TEXT_START */
2065 }
2066 #endif /* not HAVE_TEXT_START */
2067
2068 /*
2069 * Return the address of the start of the data segment prior to
2070 * doing an unexec. After unexec the return value is undefined.
2071 * See crt0.c for further information and definition of data_start.
2072 *
2073 * Apparently, on BSD systems this is etext at startup. On
2074 * USG systems (swapping) this is highly mmu dependent and
2075 * is also dependent on whether or not the program is running
2076 * with shared text. Generally there is a (possibly large)
2077 * gap between end of text and start of data with shared text.
2078 *
2079 * On Uniplus+ systems with shared text, data starts at a
2080 * fixed address. Each port (from a given oem) is generally
2081 * different, and the specific value of the start of data can
2082 * be obtained via the UniPlus+ specific "uvar" system call,
2083 * however the method outlined in crt0.c seems to be more portable.
2084 *
2085 * Probably what will have to happen when a USG unexec is available,
2086 * at least on UniPlus, is temacs will have to be made unshared so
2087 * that text and data are contiguous. Then once loadup is complete,
2088 * unexec will produce a shared executable where the data can be
2089 * at the normal shared text boundary and the startofdata variable
2090 * will be patched by unexec to the correct value.
2091 *
2092 */
2093
2094 char *
2095 start_of_data ()
2096 {
2097 #ifdef DATA_START
2098 return ((char *) DATA_START);
2099 #else
2100 #ifdef ORDINARY_LINK
2101 /*
2102 * This is a hack. Since we're not linking crt0.c or pre_crt0.c,
2103 * data_start isn't defined. We take the address of environ, which
2104 * is known to live at or near the start of the system crt0.c, and
2105 * we don't sweat the handful of bytes that might lose.
2106 */
2107 extern char **environ;
2108
2109 return((char *) &environ);
2110 #else
2111 extern int data_start;
2112 return ((char *) &data_start);
2113 #endif /* ORDINARY_LINK */
2114 #endif /* DATA_START */
2115 }
2116 #endif /* NEED_STARTS (not CANNOT_DUMP or not SYSTEM_MALLOC) */
2117
2118 #ifndef CANNOT_DUMP
2119 /* Some systems that cannot dump also cannot implement these. */
2120
2121 /*
2122 * Return the address of the end of the text segment prior to
2123 * doing an unexec. After unexec the return value is undefined.
2124 */
2125
2126 char *
2127 end_of_text ()
2128 {
2129 #ifdef TEXT_END
2130 return ((char *) TEXT_END);
2131 #else
2132 extern int etext;
2133 return ((char *) &etext);
2134 #endif
2135 }
2136
2137 /*
2138 * Return the address of the end of the data segment prior to
2139 * doing an unexec. After unexec the return value is undefined.
2140 */
2141
2142 char *
2143 end_of_data ()
2144 {
2145 #ifdef DATA_END
2146 return ((char *) DATA_END);
2147 #else
2148 extern int edata;
2149 return ((char *) &edata);
2150 #endif
2151 }
2152
2153 #endif /* not CANNOT_DUMP */
2154 \f
2155 /* init_system_name sets up the string for the Lisp function
2156 system-name to return. */
2157
2158 #ifdef BSD4_1
2159 #include <whoami.h>
2160 #endif
2161
2162 extern Lisp_Object Vsystem_name;
2163
2164 #ifndef BSD4_1
2165 #ifndef VMS
2166 #ifdef HAVE_SOCKETS
2167 #include <sys/socket.h>
2168 #include <netdb.h>
2169 #endif /* HAVE_SOCKETS */
2170 #endif /* not VMS */
2171 #endif /* not BSD4_1 */
2172
2173 void
2174 init_system_name ()
2175 {
2176 #ifdef BSD4_1
2177 Vsystem_name = build_string (sysname);
2178 #else
2179 #ifdef VMS
2180 char *sp, *end;
2181 if ((sp = egetenv ("SYS$NODE")) == 0)
2182 Vsystem_name = build_string ("vax-vms");
2183 else if ((end = index (sp, ':')) == 0)
2184 Vsystem_name = build_string (sp);
2185 else
2186 Vsystem_name = make_string (sp, end - sp);
2187 #else
2188 #ifndef HAVE_GETHOSTNAME
2189 struct utsname uts;
2190 uname (&uts);
2191 Vsystem_name = build_string (uts.nodename);
2192 #else /* HAVE_GETHOSTNAME */
2193 unsigned int hostname_size = 256;
2194 char *hostname = (char *) alloca (hostname_size);
2195
2196 /* Try to get the host name; if the buffer is too short, try
2197 again. Apparently, the only indication gethostname gives of
2198 whether the buffer was large enough is the presence or absence
2199 of a '\0' in the string. Eech. */
2200 for (;;)
2201 {
2202 gethostname (hostname, hostname_size - 1);
2203 hostname[hostname_size - 1] = '\0';
2204
2205 /* Was the buffer large enough for the '\0'? */
2206 if (strlen (hostname) < hostname_size - 1)
2207 break;
2208
2209 hostname_size <<= 1;
2210 hostname = (char *) alloca (hostname_size);
2211 }
2212 #ifdef HAVE_SOCKETS
2213 /* Turn the hostname into the official, fully-qualified hostname.
2214 Don't do this if we're going to dump; this can confuse system
2215 libraries on some machines and make the dumped emacs core dump. */
2216 #ifndef CANNOT_DUMP
2217 if (initialized)
2218 #endif /* not CANNOT_DUMP */
2219 {
2220 struct hostent *hp;
2221 int count;
2222 for (count = 0;; count++)
2223 {
2224 #ifdef TRY_AGAIN
2225 h_errno = 0;
2226 #endif
2227 hp = gethostbyname (hostname);
2228 #ifdef TRY_AGAIN
2229 if (! (hp == 0 && h_errno == TRY_AGAIN))
2230 #endif
2231 break;
2232 if (count >= 5)
2233 break;
2234 Fsleep_for (make_number (1), Qnil);
2235 }
2236 if (hp)
2237 {
2238 char *fqdn = (char *) hp->h_name;
2239 char *p;
2240
2241 if (!index (fqdn, '.'))
2242 {
2243 /* We still don't have a fully qualified domain name.
2244 Try to find one in the list of alternate names */
2245 char **alias = hp->h_aliases;
2246 while (*alias && !index (*alias, '.'))
2247 alias++;
2248 if (*alias)
2249 fqdn = *alias;
2250 }
2251 hostname = fqdn;
2252 #if 0
2253 /* Convert the host name to lower case. */
2254 /* Using ctype.h here would introduce a possible locale
2255 dependence that is probably wrong for hostnames. */
2256 p = hostname;
2257 while (*p)
2258 {
2259 if (*p >= 'A' && *p <= 'Z')
2260 *p += 'a' - 'A';
2261 p++;
2262 }
2263 #endif
2264 }
2265 }
2266 #endif /* HAVE_SOCKETS */
2267 #if (HAVE_SYSINFO && defined (SI_SRPC_DOMAIN)) || HAVE_GETDOMAINNAME
2268 if (! index (hostname, '.'))
2269 {
2270 /* The hostname is not fully qualified. Append the domain name. */
2271
2272 int hostlen = strlen (hostname);
2273 int domain_size = 256;
2274
2275 for (;;)
2276 {
2277 char *domain = (char *) alloca (domain_size + 1);
2278 char *fqdn = (char *) alloca (hostlen + 1 + domain_size + 1);
2279 #if HAVE_SYSINFO && defined (SI_SRPC_DOMAIN)
2280 int sys_domain_size = sysinfo (SI_SRPC_DOMAIN, domain, domain_size);
2281 if (sys_domain_size <= 0)
2282 break;
2283 if (domain_size < sys_domain_size)
2284 {
2285 domain_size = sys_domain_size;
2286 continue;
2287 }
2288 #else /* HAVE_GETDOMAINNAME */
2289 if (getdomainname (domain, domain_size - 1) != 0 || ! *domain)
2290 break;
2291 domain[domain_size - 1] = '\0';
2292 if (strlen (domain) == domain_size - 1)
2293 {
2294 domain_size *= 2;
2295 continue;
2296 }
2297 /* If we get an answer which means "domain unknown",
2298 don't use a domain. */
2299 if (!strcmp (domain, "(none)"))
2300 {
2301 *domain = 0;
2302 break;
2303 }
2304 #endif /* HAVE_GETDOMAINNAME */
2305 strcpy (fqdn, hostname);
2306 if (domain[0] == '.')
2307 strcpy (fqdn + hostlen, domain);
2308 else
2309 {
2310 fqdn[hostlen] = '.';
2311 strcpy (fqdn + hostlen + 1, domain);
2312 }
2313 hostname = fqdn;
2314 break;
2315 }
2316 }
2317 #endif /*! ((HAVE_SYSINFO && defined (SI_SRPC_DOMAIN)) || HAVE_GETDOMAINNAME)*/
2318 Vsystem_name = build_string (hostname);
2319 #endif /* HAVE_GETHOSTNAME */
2320 #endif /* VMS */
2321 #endif /* BSD4_1 */
2322 {
2323 unsigned char *p;
2324 for (p = XSTRING (Vsystem_name)->data; *p; p++)
2325 if (*p == ' ' || *p == '\t')
2326 *p = '-';
2327 }
2328 }
2329 \f
2330 #ifndef MSDOS
2331 #ifndef VMS
2332 #if !defined (HAVE_SELECT) || defined (BROKEN_SELECT_NON_X)
2333
2334 #include "sysselect.h"
2335 #undef select
2336
2337 #if defined (HAVE_X_WINDOWS) && !defined (HAVE_SELECT)
2338 /* Cause explanatory error message at compile time,
2339 since the select emulation is not good enough for X. */
2340 int *x = &x_windows_lose_if_no_select_system_call;
2341 #endif
2342
2343 /* Emulate as much as select as is possible under 4.1 and needed by Gnu Emacs
2344 * Only checks read descriptors.
2345 */
2346 /* How long to wait between checking fds in select */
2347 #define SELECT_PAUSE 1
2348 int select_alarmed;
2349
2350 /* For longjmp'ing back to read_input_waiting. */
2351
2352 jmp_buf read_alarm_throw;
2353
2354 /* Nonzero if the alarm signal should throw back to read_input_waiting.
2355 The read_socket_hook function sets this to 1 while it is waiting. */
2356
2357 int read_alarm_should_throw;
2358
2359 SIGTYPE
2360 select_alarm ()
2361 {
2362 select_alarmed = 1;
2363 #ifdef BSD4_1
2364 sigrelse (SIGALRM);
2365 #else /* not BSD4_1 */
2366 signal (SIGALRM, SIG_IGN);
2367 #endif /* not BSD4_1 */
2368 if (read_alarm_should_throw)
2369 longjmp (read_alarm_throw, 1);
2370 }
2371
2372 #ifndef WINDOWSNT
2373 /* Only rfds are checked. */
2374 int
2375 sys_select (nfds, rfds, wfds, efds, timeout)
2376 int nfds;
2377 SELECT_TYPE *rfds, *wfds, *efds;
2378 EMACS_TIME *timeout;
2379 {
2380 int ravail = 0, old_alarm;
2381 SELECT_TYPE orfds;
2382 int timeoutval;
2383 int *local_timeout;
2384 extern int proc_buffered_char[];
2385 #ifndef subprocesses
2386 int process_tick = 0, update_tick = 0;
2387 #else
2388 extern int process_tick, update_tick;
2389 #endif
2390 SIGTYPE (*old_trap) ();
2391 unsigned char buf;
2392
2393 #if defined (HAVE_SELECT) && defined (HAVE_X_WINDOWS)
2394 /* If we're using X, then the native select will work; we only need the
2395 emulation for non-X usage. */
2396 if (!NILP (Vwindow_system))
2397 return select (nfds, rfds, wfds, efds, timeout);
2398 #endif
2399 timeoutval = timeout ? EMACS_SECS (*timeout) : 100000;
2400 local_timeout = &timeoutval;
2401 FD_ZERO (&orfds);
2402 if (rfds)
2403 {
2404 orfds = *rfds;
2405 FD_ZERO (rfds);
2406 }
2407 if (wfds)
2408 FD_ZERO (wfds);
2409 if (efds)
2410 FD_ZERO (efds);
2411
2412 /* If we are looking only for the terminal, with no timeout,
2413 just read it and wait -- that's more efficient. */
2414 if (*local_timeout == 100000 && process_tick == update_tick
2415 && FD_ISSET (0, &orfds))
2416 {
2417 int fd;
2418 for (fd = 1; fd < nfds; ++fd)
2419 if (FD_ISSET (fd, &orfds))
2420 goto hardway;
2421 if (! detect_input_pending ())
2422 read_input_waiting ();
2423 FD_SET (0, rfds);
2424 return 1;
2425 }
2426
2427 hardway:
2428 /* Once a second, till the timer expires, check all the flagged read
2429 * descriptors to see if any input is available. If there is some then
2430 * set the corresponding bit in the return copy of rfds.
2431 */
2432 while (1)
2433 {
2434 register int to_check, fd;
2435
2436 if (rfds)
2437 {
2438 for (to_check = nfds, fd = 0; --to_check >= 0; fd++)
2439 {
2440 if (FD_ISSET (fd, &orfds))
2441 {
2442 int avail = 0, status = 0;
2443
2444 if (fd == 0)
2445 avail = detect_input_pending (); /* Special keyboard handler */
2446 else
2447 {
2448 #ifdef FIONREAD
2449 status = ioctl (fd, FIONREAD, &avail);
2450 #else /* no FIONREAD */
2451 /* Hoping it will return -1 if nothing available
2452 or 0 if all 0 chars requested are read. */
2453 if (proc_buffered_char[fd] >= 0)
2454 avail = 1;
2455 else
2456 {
2457 avail = read (fd, &buf, 1);
2458 if (avail > 0)
2459 proc_buffered_char[fd] = buf;
2460 }
2461 #endif /* no FIONREAD */
2462 }
2463 if (status >= 0 && avail > 0)
2464 {
2465 FD_SET (fd, rfds);
2466 ravail++;
2467 }
2468 }
2469 }
2470 }
2471 if (*local_timeout == 0 || ravail != 0 || process_tick != update_tick)
2472 break;
2473 old_alarm = alarm (0);
2474 old_trap = signal (SIGALRM, select_alarm);
2475 select_alarmed = 0;
2476 alarm (SELECT_PAUSE);
2477 /* Wait for a SIGALRM (or maybe a SIGTINT) */
2478 while (select_alarmed == 0 && *local_timeout != 0
2479 && process_tick == update_tick)
2480 {
2481 /* If we are interested in terminal input,
2482 wait by reading the terminal.
2483 That makes instant wakeup for terminal input at least. */
2484 if (FD_ISSET (0, &orfds))
2485 {
2486 read_input_waiting ();
2487 if (detect_input_pending ())
2488 select_alarmed = 1;
2489 }
2490 else
2491 pause ();
2492 }
2493 (*local_timeout) -= SELECT_PAUSE;
2494 /* Reset the old alarm if there was one */
2495 alarm (0);
2496 signal (SIGALRM, old_trap);
2497 if (old_alarm != 0)
2498 {
2499 /* Reset or forge an interrupt for the original handler. */
2500 old_alarm -= SELECT_PAUSE;
2501 if (old_alarm <= 0)
2502 kill (getpid (), SIGALRM); /* Fake an alarm with the orig' handler */
2503 else
2504 alarm (old_alarm);
2505 }
2506 if (*local_timeout == 0) /* Stop on timer being cleared */
2507 break;
2508 }
2509 return ravail;
2510 }
2511 #endif /* not WINDOWSNT */
2512
2513 /* Read keyboard input into the standard buffer,
2514 waiting for at least one character. */
2515
2516 /* Make all keyboard buffers much bigger when using a window system. */
2517 #ifdef HAVE_WINDOW_SYSTEM
2518 #define BUFFER_SIZE_FACTOR 16
2519 #else
2520 #define BUFFER_SIZE_FACTOR 1
2521 #endif
2522
2523 read_input_waiting ()
2524 {
2525 struct input_event e;
2526 int nread, i;
2527 extern int quit_char;
2528
2529 if (read_socket_hook)
2530 {
2531 struct input_event buf[256];
2532
2533 read_alarm_should_throw = 0;
2534 if (! setjmp (read_alarm_throw))
2535 nread = (*read_socket_hook) (0, buf, 256, 1, 0);
2536 else
2537 nread = -1;
2538
2539 /* Scan the chars for C-g and store them in kbd_buffer. */
2540 for (i = 0; i < nread; i++)
2541 {
2542 kbd_buffer_store_event (&buf[i]);
2543 /* Don't look at input that follows a C-g too closely.
2544 This reduces lossage due to autorepeat on C-g. */
2545 if (buf[i].kind == ascii_keystroke
2546 && buf[i].code == quit_char)
2547 break;
2548 }
2549 }
2550 else
2551 {
2552 char buf[3];
2553 nread = read (fileno (stdin), buf, 1);
2554
2555 /* Scan the chars for C-g and store them in kbd_buffer. */
2556 e.kind = ascii_keystroke;
2557 XSETFRAME (e.frame_or_window, selected_frame);
2558 e.modifiers = 0;
2559 for (i = 0; i < nread; i++)
2560 {
2561 /* Convert chars > 0177 to meta events if desired.
2562 We do this under the same conditions that read_avail_input does. */
2563 if (read_socket_hook == 0)
2564 {
2565 /* If the user says she has a meta key, then believe her. */
2566 if (meta_key == 1 && (buf[i] & 0x80))
2567 e.modifiers = meta_modifier;
2568 if (meta_key != 2)
2569 buf[i] &= ~0x80;
2570 }
2571
2572 XSETINT (e.code, buf[i]);
2573 kbd_buffer_store_event (&e);
2574 /* Don't look at input that follows a C-g too closely.
2575 This reduces lossage due to autorepeat on C-g. */
2576 if (buf[i] == quit_char)
2577 break;
2578 }
2579 }
2580 }
2581
2582 #endif /* not HAVE_SELECT */
2583 #endif /* not VMS */
2584 #endif /* not MSDOS */
2585 \f
2586 #ifdef BSD4_1
2587 /*
2588 * Partially emulate 4.2 open call.
2589 * open is defined as this in 4.1.
2590 *
2591 * - added by Michael Bloom @ Citicorp/TTI
2592 *
2593 */
2594
2595 int
2596 sys_open (path, oflag, mode)
2597 char *path;
2598 int oflag, mode;
2599 {
2600 if (oflag & O_CREAT)
2601 return creat (path, mode);
2602 else
2603 return open (path, oflag);
2604 }
2605
2606 init_sigio (fd)
2607 int fd;
2608 {
2609 if (noninteractive)
2610 return;
2611 lmode = LINTRUP | lmode;
2612 ioctl (fd, TIOCLSET, &lmode);
2613 }
2614
2615 reset_sigio ()
2616 {
2617 if (noninteractive)
2618 return;
2619 lmode = ~LINTRUP & lmode;
2620 ioctl (0, TIOCLSET, &lmode);
2621 }
2622
2623 request_sigio ()
2624 {
2625 sigrelse (SIGTINT);
2626
2627 interrupts_deferred = 0;
2628 }
2629
2630 unrequest_sigio ()
2631 {
2632 sighold (SIGTINT);
2633
2634 interrupts_deferred = 1;
2635 }
2636
2637 /* still inside #ifdef BSD4_1 */
2638 #ifdef subprocesses
2639
2640 int sigheld; /* Mask of held signals */
2641
2642 sigholdx (signum)
2643 int signum;
2644 {
2645 sigheld |= sigbit (signum);
2646 sighold (signum);
2647 }
2648
2649 sigisheld (signum)
2650 int signum;
2651 {
2652 sigheld |= sigbit (signum);
2653 }
2654
2655 sigunhold (signum)
2656 int signum;
2657 {
2658 sigheld &= ~sigbit (signum);
2659 sigrelse (signum);
2660 }
2661
2662 sigfree () /* Free all held signals */
2663 {
2664 int i;
2665 for (i = 0; i < NSIG; i++)
2666 if (sigheld & sigbit (i))
2667 sigrelse (i);
2668 sigheld = 0;
2669 }
2670
2671 sigbit (i)
2672 {
2673 return 1 << (i - 1);
2674 }
2675 #endif /* subprocesses */
2676 #endif /* BSD4_1 */
2677 \f
2678 /* POSIX signals support - DJB */
2679 /* Anyone with POSIX signals should have ANSI C declarations */
2680
2681 #ifdef POSIX_SIGNALS
2682
2683 sigset_t old_mask, empty_mask, full_mask, temp_mask;
2684 static struct sigaction new_action, old_action;
2685
2686 init_signals ()
2687 {
2688 sigemptyset (&empty_mask);
2689 sigfillset (&full_mask);
2690 }
2691
2692 signal_handler_t
2693 sys_signal (int signal_number, signal_handler_t action)
2694 {
2695 sigemptyset (&new_action.sa_mask);
2696 new_action.sa_handler = action;
2697 #ifdef SA_RESTART
2698 /* Emacs mostly works better with restartable system services. If this
2699 * flag exists, we probably want to turn it on here.
2700 */
2701 new_action.sa_flags = SA_RESTART;
2702 #else
2703 new_action.sa_flags = 0;
2704 #endif
2705 sigaction (signal_number, &new_action, &old_action);
2706 return (old_action.sa_handler);
2707 }
2708
2709 #ifndef __GNUC__
2710 /* If we're compiling with GCC, we don't need this function, since it
2711 can be written as a macro. */
2712 sigset_t
2713 sys_sigmask (int sig)
2714 {
2715 sigset_t mask;
2716 sigemptyset (&mask);
2717 sigaddset (&mask, sig);
2718 return mask;
2719 }
2720 #endif
2721
2722 int
2723 sys_sigpause (sigset_t new_mask)
2724 {
2725 /* pause emulating berk sigpause... */
2726 sigsuspend (&new_mask);
2727 return (EINTR);
2728 }
2729
2730 /* I'd like to have these guys return pointers to the mask storage in here,
2731 but there'd be trouble if the code was saving multiple masks. I'll be
2732 safe and pass the structure. It normally won't be more than 2 bytes
2733 anyhow. - DJB */
2734
2735 sigset_t
2736 sys_sigblock (sigset_t new_mask)
2737 {
2738 sigset_t old_mask;
2739 sigprocmask (SIG_BLOCK, &new_mask, &old_mask);
2740 return (old_mask);
2741 }
2742
2743 sigset_t
2744 sys_sigunblock (sigset_t new_mask)
2745 {
2746 sigset_t old_mask;
2747 sigprocmask (SIG_UNBLOCK, &new_mask, &old_mask);
2748 return (old_mask);
2749 }
2750
2751 sigset_t
2752 sys_sigsetmask (sigset_t new_mask)
2753 {
2754 sigset_t old_mask;
2755 sigprocmask (SIG_SETMASK, &new_mask, &old_mask);
2756 return (old_mask);
2757 }
2758
2759 #endif /* POSIX_SIGNALS */
2760 \f
2761 #ifndef HAVE_RANDOM
2762 #ifdef random
2763 #define HAVE_RANDOM
2764 #endif
2765 #endif
2766
2767 /* Figure out how many bits the system's random number generator uses.
2768 `random' and `lrand48' are assumed to return 31 usable bits.
2769 BSD `rand' returns a 31 bit value but the low order bits are unusable;
2770 so we'll shift it and treat it like the 15-bit USG `rand'. */
2771
2772 #ifndef RAND_BITS
2773 # ifdef HAVE_RANDOM
2774 # define RAND_BITS 31
2775 # else /* !HAVE_RANDOM */
2776 # ifdef HAVE_LRAND48
2777 # define RAND_BITS 31
2778 # define random lrand48
2779 # else /* !HAVE_LRAND48 */
2780 # define RAND_BITS 15
2781 # if RAND_MAX == 32767
2782 # define random rand
2783 # else /* RAND_MAX != 32767 */
2784 # if RAND_MAX == 2147483647
2785 # define random() (rand () >> 16)
2786 # else /* RAND_MAX != 2147483647 */
2787 # ifdef USG
2788 # define random rand
2789 # else
2790 # define random() (rand () >> 16)
2791 # endif /* !USG */
2792 # endif /* RAND_MAX != 2147483647 */
2793 # endif /* RAND_MAX != 32767 */
2794 # endif /* !HAVE_LRAND48 */
2795 # endif /* !HAVE_RANDOM */
2796 #endif /* !RAND_BITS */
2797
2798 void
2799 seed_random (arg)
2800 long arg;
2801 {
2802 #ifdef HAVE_RANDOM
2803 srandom ((unsigned int)arg);
2804 #else
2805 # ifdef HAVE_LRAND48
2806 srand48 (arg);
2807 # else
2808 srand ((unsigned int)arg);
2809 # endif
2810 #endif
2811 }
2812
2813 /*
2814 * Build a full Emacs-sized word out of whatever we've got.
2815 * This suffices even for a 64-bit architecture with a 15-bit rand.
2816 */
2817 long
2818 get_random ()
2819 {
2820 long val = random ();
2821 #if VALBITS > RAND_BITS
2822 val = (val << RAND_BITS) ^ random ();
2823 #if VALBITS > 2*RAND_BITS
2824 val = (val << RAND_BITS) ^ random ();
2825 #if VALBITS > 3*RAND_BITS
2826 val = (val << RAND_BITS) ^ random ();
2827 #if VALBITS > 4*RAND_BITS
2828 val = (val << RAND_BITS) ^ random ();
2829 #endif /* need at least 5 */
2830 #endif /* need at least 4 */
2831 #endif /* need at least 3 */
2832 #endif /* need at least 2 */
2833 return val & ((1L << VALBITS) - 1);
2834 }
2835 \f
2836 #ifdef WRONG_NAME_INSQUE
2837
2838 insque (q,p)
2839 caddr_t q,p;
2840 {
2841 _insque (q,p);
2842 }
2843
2844 #endif
2845 \f
2846 #ifdef VMS
2847
2848 #ifdef getenv
2849 /* If any place else asks for the TERM variable,
2850 allow it to be overridden with the EMACS_TERM variable
2851 before attempting to translate the logical name TERM. As a last
2852 resort, ask for VAX C's special idea of the TERM variable. */
2853 #undef getenv
2854 char *
2855 sys_getenv (name)
2856 char *name;
2857 {
2858 register char *val;
2859 static char buf[256];
2860 static struct dsc$descriptor_s equiv
2861 = {sizeof (buf), DSC$K_DTYPE_T, DSC$K_CLASS_S, buf};
2862 static struct dsc$descriptor_s d_name
2863 = {0, DSC$K_DTYPE_T, DSC$K_CLASS_S, 0};
2864 short eqlen;
2865
2866 if (!strcmp (name, "TERM"))
2867 {
2868 val = (char *) getenv ("EMACS_TERM");
2869 if (val)
2870 return val;
2871 }
2872
2873 d_name.dsc$w_length = strlen (name);
2874 d_name.dsc$a_pointer = name;
2875 if (LIB$SYS_TRNLOG (&d_name, &eqlen, &equiv) == 1)
2876 {
2877 char *str = (char *) xmalloc (eqlen + 1);
2878 bcopy (buf, str, eqlen);
2879 str[eqlen] = '\0';
2880 /* This is a storage leak, but a pain to fix. With luck,
2881 no one will ever notice. */
2882 return str;
2883 }
2884 return (char *) getenv (name);
2885 }
2886 #endif /* getenv */
2887
2888 #ifdef abort
2889 /* Since VMS doesn't believe in core dumps, the only way to debug this beast is
2890 to force a call on the debugger from within the image. */
2891 #undef abort
2892 sys_abort ()
2893 {
2894 reset_sys_modes ();
2895 LIB$SIGNAL (SS$_DEBUG);
2896 }
2897 #endif /* abort */
2898 #endif /* VMS */
2899 \f
2900 #ifdef VMS
2901 #ifdef LINK_CRTL_SHARE
2902 #ifdef SHARABLE_LIB_BUG
2903 /* Variables declared noshare and initialized in sharable libraries
2904 cannot be shared. The VMS linker incorrectly forces you to use a private
2905 version which is uninitialized... If not for this "feature", we
2906 could use the C library definition of sys_nerr and sys_errlist. */
2907 int sys_nerr = 35;
2908 char *sys_errlist[] =
2909 {
2910 "error 0",
2911 "not owner",
2912 "no such file or directory",
2913 "no such process",
2914 "interrupted system call",
2915 "i/o error",
2916 "no such device or address",
2917 "argument list too long",
2918 "exec format error",
2919 "bad file number",
2920 "no child process",
2921 "no more processes",
2922 "not enough memory",
2923 "permission denied",
2924 "bad address",
2925 "block device required",
2926 "mount devices busy",
2927 "file exists",
2928 "cross-device link",
2929 "no such device",
2930 "not a directory",
2931 "is a directory",
2932 "invalid argument",
2933 "file table overflow",
2934 "too many open files",
2935 "not a typewriter",
2936 "text file busy",
2937 "file too big",
2938 "no space left on device",
2939 "illegal seek",
2940 "read-only file system",
2941 "too many links",
2942 "broken pipe",
2943 "math argument",
2944 "result too large",
2945 "I/O stream empty",
2946 "vax/vms specific error code nontranslatable error"
2947 };
2948 #endif /* SHARABLE_LIB_BUG */
2949 #endif /* LINK_CRTL_SHARE */
2950 #endif /* VMS */
2951
2952 #ifndef HAVE_STRERROR
2953 #ifndef WINDOWSNT
2954 char *
2955 strerror (errnum)
2956 int errnum;
2957 {
2958 extern char *sys_errlist[];
2959 extern int sys_nerr;
2960
2961 if (errnum >= 0 && errnum < sys_nerr)
2962 return sys_errlist[errnum];
2963 return (char *) "Unknown error";
2964 }
2965 #endif /* not WINDOWSNT */
2966 #endif /* ! HAVE_STRERROR */
2967 \f
2968 #ifdef INTERRUPTIBLE_OPEN
2969
2970 int
2971 /* VARARGS 2 */
2972 sys_open (path, oflag, mode)
2973 char *path;
2974 int oflag, mode;
2975 {
2976 register int rtnval;
2977
2978 while ((rtnval = open (path, oflag, mode)) == -1
2979 && (errno == EINTR));
2980 return (rtnval);
2981 }
2982
2983 #endif /* INTERRUPTIBLE_OPEN */
2984
2985 #ifdef INTERRUPTIBLE_CLOSE
2986
2987 sys_close (fd)
2988 int fd;
2989 {
2990 int did_retry = 0;
2991 register int rtnval;
2992
2993 while ((rtnval = close (fd)) == -1
2994 && (errno == EINTR))
2995 did_retry = 1;
2996
2997 /* If close is interrupted SunOS 4.1 may or may not have closed the
2998 file descriptor. If it did the second close will fail with
2999 errno = EBADF. That means we have succeeded. */
3000 if (rtnval == -1 && did_retry && errno == EBADF)
3001 return 0;
3002
3003 return rtnval;
3004 }
3005
3006 #endif /* INTERRUPTIBLE_CLOSE */
3007
3008 #ifdef INTERRUPTIBLE_IO
3009
3010 int
3011 sys_read (fildes, buf, nbyte)
3012 int fildes;
3013 char *buf;
3014 unsigned int nbyte;
3015 {
3016 register int rtnval;
3017
3018 while ((rtnval = read (fildes, buf, nbyte)) == -1
3019 && (errno == EINTR));
3020 return (rtnval);
3021 }
3022
3023 int
3024 sys_write (fildes, buf, nbyte)
3025 int fildes;
3026 char *buf;
3027 unsigned int nbyte;
3028 {
3029 register int rtnval, bytes_written;
3030
3031 bytes_written = 0;
3032
3033 while (nbyte > 0)
3034 {
3035 rtnval = write (fildes, buf, nbyte);
3036
3037 if (rtnval == -1)
3038 {
3039 if (errno == EINTR)
3040 continue;
3041 else
3042 return (bytes_written ? bytes_written : -1);
3043 }
3044
3045 buf += rtnval;
3046 nbyte -= rtnval;
3047 bytes_written += rtnval;
3048 }
3049 return (bytes_written);
3050 }
3051
3052 #endif /* INTERRUPTIBLE_IO */
3053 \f
3054 #ifndef HAVE_VFORK
3055 #ifndef WINDOWSNT
3056 /*
3057 * Substitute fork for vfork on USG flavors.
3058 */
3059
3060 VFORK_RETURN_TYPE
3061 vfork ()
3062 {
3063 return (fork ());
3064 }
3065 #endif /* not WINDOWSNT */
3066 #endif /* not HAVE_VFORK */
3067 \f
3068 #ifdef USG
3069 /*
3070 * All of the following are for USG.
3071 *
3072 * On USG systems the system calls are INTERRUPTIBLE by signals
3073 * that the user program has elected to catch. Thus the system call
3074 * must be retried in these cases. To handle this without massive
3075 * changes in the source code, we remap the standard system call names
3076 * to names for our own functions in sysdep.c that do the system call
3077 * with retries. Actually, for portability reasons, it is good
3078 * programming practice, as this example shows, to limit all actual
3079 * system calls to a single occurrence in the source. Sure, this
3080 * adds an extra level of function call overhead but it is almost
3081 * always negligible. Fred Fish, Unisoft Systems Inc.
3082 */
3083
3084 #ifndef HAVE_SYS_SIGLIST
3085 char *sys_siglist[NSIG + 1] =
3086 {
3087 #ifdef AIX
3088 /* AIX has changed the signals a bit */
3089 "bogus signal", /* 0 */
3090 "hangup", /* 1 SIGHUP */
3091 "interrupt", /* 2 SIGINT */
3092 "quit", /* 3 SIGQUIT */
3093 "illegal instruction", /* 4 SIGILL */
3094 "trace trap", /* 5 SIGTRAP */
3095 "IOT instruction", /* 6 SIGIOT */
3096 "crash likely", /* 7 SIGDANGER */
3097 "floating point exception", /* 8 SIGFPE */
3098 "kill", /* 9 SIGKILL */
3099 "bus error", /* 10 SIGBUS */
3100 "segmentation violation", /* 11 SIGSEGV */
3101 "bad argument to system call", /* 12 SIGSYS */
3102 "write on a pipe with no one to read it", /* 13 SIGPIPE */
3103 "alarm clock", /* 14 SIGALRM */
3104 "software termination signum", /* 15 SIGTERM */
3105 "user defined signal 1", /* 16 SIGUSR1 */
3106 "user defined signal 2", /* 17 SIGUSR2 */
3107 "death of a child", /* 18 SIGCLD */
3108 "power-fail restart", /* 19 SIGPWR */
3109 "bogus signal", /* 20 */
3110 "bogus signal", /* 21 */
3111 "bogus signal", /* 22 */
3112 "bogus signal", /* 23 */
3113 "bogus signal", /* 24 */
3114 "LAN I/O interrupt", /* 25 SIGAIO */
3115 "PTY I/O interrupt", /* 26 SIGPTY */
3116 "I/O intervention required", /* 27 SIGIOINT */
3117 #ifdef AIXHFT
3118 "HFT grant", /* 28 SIGGRANT */
3119 "HFT retract", /* 29 SIGRETRACT */
3120 "HFT sound done", /* 30 SIGSOUND */
3121 "HFT input ready", /* 31 SIGMSG */
3122 #endif
3123 #else /* not AIX */
3124 "bogus signal", /* 0 */
3125 "hangup", /* 1 SIGHUP */
3126 "interrupt", /* 2 SIGINT */
3127 "quit", /* 3 SIGQUIT */
3128 "illegal instruction", /* 4 SIGILL */
3129 "trace trap", /* 5 SIGTRAP */
3130 "IOT instruction", /* 6 SIGIOT */
3131 "EMT instruction", /* 7 SIGEMT */
3132 "floating point exception", /* 8 SIGFPE */
3133 "kill", /* 9 SIGKILL */
3134 "bus error", /* 10 SIGBUS */
3135 "segmentation violation", /* 11 SIGSEGV */
3136 "bad argument to system call", /* 12 SIGSYS */
3137 "write on a pipe with no one to read it", /* 13 SIGPIPE */
3138 "alarm clock", /* 14 SIGALRM */
3139 "software termination signum", /* 15 SIGTERM */
3140 "user defined signal 1", /* 16 SIGUSR1 */
3141 "user defined signal 2", /* 17 SIGUSR2 */
3142 "death of a child", /* 18 SIGCLD */
3143 "power-fail restart", /* 19 SIGPWR */
3144 #ifdef sun
3145 "window size change", /* 20 SIGWINCH */
3146 "urgent socket condition", /* 21 SIGURG */
3147 "pollable event occurred", /* 22 SIGPOLL */
3148 "stop (cannot be caught or ignored)", /* 23 SIGSTOP */
3149 "user stop requested from tty", /* 24 SIGTSTP */
3150 "stopped process has been continued", /* 25 SIGCONT */
3151 "background tty read attempted", /* 26 SIGTTIN */
3152 "background tty write attempted", /* 27 SIGTTOU */
3153 "virtual timer expired", /* 28 SIGVTALRM */
3154 "profiling timer expired", /* 29 SIGPROF */
3155 "exceeded cpu limit", /* 30 SIGXCPU */
3156 "exceeded file size limit", /* 31 SIGXFSZ */
3157 "process's lwps are blocked", /* 32 SIGWAITING */
3158 "special signal used by thread library", /* 33 SIGLWP */
3159 #ifdef SIGFREEZE
3160 "Special Signal Used By CPR", /* 34 SIGFREEZE */
3161 #endif
3162 #ifdef SIGTHAW
3163 "Special Signal Used By CPR", /* 35 SIGTHAW */
3164 #endif
3165 #endif /* sun */
3166 #endif /* not AIX */
3167 0
3168 };
3169 #endif /* HAVE_SYS_SIGLIST */
3170
3171 /*
3172 * Warning, this function may not duplicate 4.2 action properly
3173 * under error conditions.
3174 */
3175
3176 #ifndef MAXPATHLEN
3177 /* In 4.1, param.h fails to define this. */
3178 #define MAXPATHLEN 1024
3179 #endif
3180
3181 #ifndef HAVE_GETWD
3182
3183 char *
3184 getwd (pathname)
3185 char *pathname;
3186 {
3187 char *npath, *spath;
3188 extern char *getcwd ();
3189
3190 BLOCK_INPUT; /* getcwd uses malloc */
3191 spath = npath = getcwd ((char *) 0, MAXPATHLEN);
3192 if (spath == 0)
3193 return spath;
3194 /* On Altos 3068, getcwd can return @hostname/dir, so discard
3195 up to first slash. Should be harmless on other systems. */
3196 while (*npath && *npath != '/')
3197 npath++;
3198 strcpy (pathname, npath);
3199 free (spath); /* getcwd uses malloc */
3200 UNBLOCK_INPUT;
3201 return pathname;
3202 }
3203
3204 #endif /* HAVE_GETWD */
3205
3206 /*
3207 * Emulate rename using unlink/link. Note that this is
3208 * only partially correct. Also, doesn't enforce restriction
3209 * that files be of same type (regular->regular, dir->dir, etc).
3210 */
3211
3212 #ifndef HAVE_RENAME
3213
3214 rename (from, to)
3215 const char *from;
3216 const char *to;
3217 {
3218 if (access (from, 0) == 0)
3219 {
3220 unlink (to);
3221 if (link (from, to) == 0)
3222 if (unlink (from) == 0)
3223 return (0);
3224 }
3225 return (-1);
3226 }
3227
3228 #endif
3229
3230
3231 #ifdef HPUX
3232 #ifndef HAVE_PERROR
3233
3234 /* HPUX curses library references perror, but as far as we know
3235 it won't be called. Anyway this definition will do for now. */
3236
3237 perror ()
3238 {
3239 }
3240
3241 #endif /* not HAVE_PERROR */
3242 #endif /* HPUX */
3243
3244 #ifndef HAVE_DUP2
3245
3246 /*
3247 * Emulate BSD dup2. First close newd if it already exists.
3248 * Then, attempt to dup oldd. If not successful, call dup2 recursively
3249 * until we are, then close the unsuccessful ones.
3250 */
3251
3252 dup2 (oldd, newd)
3253 int oldd;
3254 int newd;
3255 {
3256 register int fd, ret;
3257
3258 sys_close (newd);
3259
3260 #ifdef F_DUPFD
3261 fd = fcntl (oldd, F_DUPFD, newd);
3262 if (fd != newd)
3263 error ("can't dup2 (%i,%i) : %s", oldd, newd, strerror (errno));
3264 #else
3265 fd = dup (old);
3266 if (fd == -1)
3267 return -1;
3268 if (fd == new)
3269 return new;
3270 ret = dup2 (old,new);
3271 sys_close (fd);
3272 return ret;
3273 #endif
3274 }
3275
3276 #endif /* not HAVE_DUP2 */
3277
3278 /*
3279 * Gettimeofday. Simulate as much as possible. Only accurate
3280 * to nearest second. Emacs doesn't use tzp so ignore it for now.
3281 * Only needed when subprocesses are defined.
3282 */
3283
3284 #ifdef subprocesses
3285 #ifndef VMS
3286 #ifndef HAVE_GETTIMEOFDAY
3287 #ifdef HAVE_TIMEVAL
3288
3289 /* ARGSUSED */
3290 gettimeofday (tp, tzp)
3291 struct timeval *tp;
3292 struct timezone *tzp;
3293 {
3294 extern long time ();
3295
3296 tp->tv_sec = time ((long *)0);
3297 tp->tv_usec = 0;
3298 if (tzp != 0)
3299 tzp->tz_minuteswest = -1;
3300 }
3301
3302 #endif
3303 #endif
3304 #endif
3305 #endif /* subprocess && !HAVE_GETTIMEOFDAY && HAVE_TIMEVAL && !VMS */
3306
3307 /*
3308 * This function will go away as soon as all the stubs fixed. (fnf)
3309 */
3310
3311 croak (badfunc)
3312 char *badfunc;
3313 {
3314 printf ("%s not yet implemented\r\n", badfunc);
3315 reset_sys_modes ();
3316 exit (1);
3317 }
3318
3319 #endif /* USG */
3320 \f
3321 #ifdef DGUX
3322
3323 char *sys_siglist[NSIG + 1] =
3324 {
3325 "null signal", /* 0 SIGNULL */
3326 "hangup", /* 1 SIGHUP */
3327 "interrupt", /* 2 SIGINT */
3328 "quit", /* 3 SIGQUIT */
3329 "illegal instruction", /* 4 SIGILL */
3330 "trace trap", /* 5 SIGTRAP */
3331 "abort termination", /* 6 SIGABRT */
3332 "SIGEMT", /* 7 SIGEMT */
3333 "floating point exception", /* 8 SIGFPE */
3334 "kill", /* 9 SIGKILL */
3335 "bus error", /* 10 SIGBUS */
3336 "segmentation violation", /* 11 SIGSEGV */
3337 "bad argument to system call", /* 12 SIGSYS */
3338 "write on a pipe with no reader", /* 13 SIGPIPE */
3339 "alarm clock", /* 14 SIGALRM */
3340 "software termination signal", /* 15 SIGTERM */
3341 "user defined signal 1", /* 16 SIGUSR1 */
3342 "user defined signal 2", /* 17 SIGUSR2 */
3343 "child stopped or terminated", /* 18 SIGCLD */
3344 "power-fail restart", /* 19 SIGPWR */
3345 "window size changed", /* 20 SIGWINCH */
3346 "undefined", /* 21 */
3347 "pollable event occurred", /* 22 SIGPOLL */
3348 "sendable stop signal not from tty", /* 23 SIGSTOP */
3349 "stop signal from tty", /* 24 SIGSTP */
3350 "continue a stopped process", /* 25 SIGCONT */
3351 "attempted background tty read", /* 26 SIGTTIN */
3352 "attempted background tty write", /* 27 SIGTTOU */
3353 "undefined", /* 28 */
3354 "undefined", /* 29 */
3355 "undefined", /* 30 */
3356 "undefined", /* 31 */
3357 "undefined", /* 32 */
3358 "socket (TCP/IP) urgent data arrival", /* 33 SIGURG */
3359 "I/O is possible", /* 34 SIGIO */
3360 "exceeded cpu time limit", /* 35 SIGXCPU */
3361 "exceeded file size limit", /* 36 SIGXFSZ */
3362 "virtual time alarm", /* 37 SIGVTALRM */
3363 "profiling time alarm", /* 38 SIGPROF */
3364 "undefined", /* 39 */
3365 "file record locks revoked", /* 40 SIGLOST */
3366 "undefined", /* 41 */
3367 "undefined", /* 42 */
3368 "undefined", /* 43 */
3369 "undefined", /* 44 */
3370 "undefined", /* 45 */
3371 "undefined", /* 46 */
3372 "undefined", /* 47 */
3373 "undefined", /* 48 */
3374 "undefined", /* 49 */
3375 "undefined", /* 50 */
3376 "undefined", /* 51 */
3377 "undefined", /* 52 */
3378 "undefined", /* 53 */
3379 "undefined", /* 54 */
3380 "undefined", /* 55 */
3381 "undefined", /* 56 */
3382 "undefined", /* 57 */
3383 "undefined", /* 58 */
3384 "undefined", /* 59 */
3385 "undefined", /* 60 */
3386 "undefined", /* 61 */
3387 "undefined", /* 62 */
3388 "undefined", /* 63 */
3389 "notification message in mess. queue", /* 64 SIGDGNOTIFY */
3390 0
3391 };
3392
3393 #endif /* DGUX */
3394 \f
3395 /* Directory routines for systems that don't have them. */
3396
3397 #ifdef SYSV_SYSTEM_DIR
3398
3399 #include <dirent.h>
3400
3401 #if defined(BROKEN_CLOSEDIR) || !defined(HAVE_CLOSEDIR)
3402
3403 int
3404 closedir (dirp)
3405 register DIR *dirp; /* stream from opendir */
3406 {
3407 int rtnval;
3408
3409 rtnval = sys_close (dirp->dd_fd);
3410
3411 /* Some systems (like Solaris) allocate the buffer and the DIR all
3412 in one block. Why in the world are we freeing this ourselves
3413 anyway? */
3414 #if ! (defined (sun) && defined (USG5_4))
3415 xfree ((char *) dirp->dd_buf); /* directory block defined in <dirent.h> */
3416 #endif
3417 xfree ((char *) dirp);
3418
3419 return rtnval;
3420 }
3421 #endif /* BROKEN_CLOSEDIR or not HAVE_CLOSEDIR */
3422 #endif /* SYSV_SYSTEM_DIR */
3423
3424 #ifdef NONSYSTEM_DIR_LIBRARY
3425
3426 DIR *
3427 opendir (filename)
3428 char *filename; /* name of directory */
3429 {
3430 register DIR *dirp; /* -> malloc'ed storage */
3431 register int fd; /* file descriptor for read */
3432 struct stat sbuf; /* result of fstat */
3433
3434 fd = sys_open (filename, 0);
3435 if (fd < 0)
3436 return 0;
3437
3438 BLOCK_INPUT;
3439 if (fstat (fd, &sbuf) < 0
3440 || (sbuf.st_mode & S_IFMT) != S_IFDIR
3441 || (dirp = (DIR *) malloc (sizeof (DIR))) == 0)
3442 {
3443 sys_close (fd);
3444 UNBLOCK_INPUT;
3445 return 0; /* bad luck today */
3446 }
3447 UNBLOCK_INPUT;
3448
3449 dirp->dd_fd = fd;
3450 dirp->dd_loc = dirp->dd_size = 0; /* refill needed */
3451
3452 return dirp;
3453 }
3454
3455 void
3456 closedir (dirp)
3457 register DIR *dirp; /* stream from opendir */
3458 {
3459 sys_close (dirp->dd_fd);
3460 xfree ((char *) dirp);
3461 }
3462
3463
3464 #ifndef VMS
3465 #define DIRSIZ 14
3466 struct olddir
3467 {
3468 ino_t od_ino; /* inode */
3469 char od_name[DIRSIZ]; /* filename */
3470 };
3471 #endif /* not VMS */
3472
3473 struct direct dir_static; /* simulated directory contents */
3474
3475 /* ARGUSED */
3476 struct direct *
3477 readdir (dirp)
3478 register DIR *dirp; /* stream from opendir */
3479 {
3480 #ifndef VMS
3481 register struct olddir *dp; /* -> directory data */
3482 #else /* VMS */
3483 register struct dir$_name *dp; /* -> directory data */
3484 register struct dir$_version *dv; /* -> version data */
3485 #endif /* VMS */
3486
3487 for (; ;)
3488 {
3489 if (dirp->dd_loc >= dirp->dd_size)
3490 dirp->dd_loc = dirp->dd_size = 0;
3491
3492 if (dirp->dd_size == 0 /* refill buffer */
3493 && (dirp->dd_size = sys_read (dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ)) <= 0)
3494 return 0;
3495
3496 #ifndef VMS
3497 dp = (struct olddir *) &dirp->dd_buf[dirp->dd_loc];
3498 dirp->dd_loc += sizeof (struct olddir);
3499
3500 if (dp->od_ino != 0) /* not deleted entry */
3501 {
3502 dir_static.d_ino = dp->od_ino;
3503 strncpy (dir_static.d_name, dp->od_name, DIRSIZ);
3504 dir_static.d_name[DIRSIZ] = '\0';
3505 dir_static.d_namlen = strlen (dir_static.d_name);
3506 dir_static.d_reclen = sizeof (struct direct)
3507 - MAXNAMLEN + 3
3508 + dir_static.d_namlen - dir_static.d_namlen % 4;
3509 return &dir_static; /* -> simulated structure */
3510 }
3511 #else /* VMS */
3512 dp = (struct dir$_name *) dirp->dd_buf;
3513 if (dirp->dd_loc == 0)
3514 dirp->dd_loc = (dp->dir$b_namecount&1) ? dp->dir$b_namecount + 1
3515 : dp->dir$b_namecount;
3516 dv = (struct dir$_version *)&dp->dir$t_name[dirp->dd_loc];
3517 dir_static.d_ino = dv->dir$w_fid_num;
3518 dir_static.d_namlen = dp->dir$b_namecount;
3519 dir_static.d_reclen = sizeof (struct direct)
3520 - MAXNAMLEN + 3
3521 + dir_static.d_namlen - dir_static.d_namlen % 4;
3522 strncpy (dir_static.d_name, dp->dir$t_name, dp->dir$b_namecount);
3523 dir_static.d_name[dir_static.d_namlen] = '\0';
3524 dirp->dd_loc = dirp->dd_size; /* only one record at a time */
3525 return &dir_static;
3526 #endif /* VMS */
3527 }
3528 }
3529
3530 #ifdef VMS
3531 /* readdirver is just like readdir except it returns all versions of a file
3532 as separate entries. */
3533
3534 /* ARGUSED */
3535 struct direct *
3536 readdirver (dirp)
3537 register DIR *dirp; /* stream from opendir */
3538 {
3539 register struct dir$_name *dp; /* -> directory data */
3540 register struct dir$_version *dv; /* -> version data */
3541
3542 if (dirp->dd_loc >= dirp->dd_size - sizeof (struct dir$_name))
3543 dirp->dd_loc = dirp->dd_size = 0;
3544
3545 if (dirp->dd_size == 0 /* refill buffer */
3546 && (dirp->dd_size = sys_read (dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ)) <= 0)
3547 return 0;
3548
3549 dp = (struct dir$_name *) dirp->dd_buf;
3550 if (dirp->dd_loc == 0)
3551 dirp->dd_loc = (dp->dir$b_namecount & 1) ? dp->dir$b_namecount + 1
3552 : dp->dir$b_namecount;
3553 dv = (struct dir$_version *) &dp->dir$t_name[dirp->dd_loc];
3554 strncpy (dir_static.d_name, dp->dir$t_name, dp->dir$b_namecount);
3555 sprintf (&dir_static.d_name[dp->dir$b_namecount], ";%d", dv->dir$w_version);
3556 dir_static.d_namlen = strlen (dir_static.d_name);
3557 dir_static.d_ino = dv->dir$w_fid_num;
3558 dir_static.d_reclen = sizeof (struct direct) - MAXNAMLEN + 3
3559 + dir_static.d_namlen - dir_static.d_namlen % 4;
3560 dirp->dd_loc = ((char *) (++dv) - dp->dir$t_name);
3561 return &dir_static;
3562 }
3563
3564 #endif /* VMS */
3565
3566 #endif /* NONSYSTEM_DIR_LIBRARY */
3567
3568 \f
3569 int
3570 set_file_times (filename, atime, mtime)
3571 char *filename;
3572 EMACS_TIME atime, mtime;
3573 {
3574 #ifdef HAVE_UTIMES
3575 struct timeval tv[2];
3576 tv[0] = atime;
3577 tv[1] = mtime;
3578 return utimes (filename, tv);
3579 #else /* not HAVE_UTIMES */
3580 struct utimbuf utb;
3581 utb.actime = EMACS_SECS (atime);
3582 utb.modtime = EMACS_SECS (mtime);
3583 return utime (filename, &utb);
3584 #endif /* not HAVE_UTIMES */
3585 }
3586 \f
3587 /* mkdir and rmdir functions, for systems which don't have them. */
3588
3589 #ifndef HAVE_MKDIR
3590 /*
3591 * Written by Robert Rother, Mariah Corporation, August 1985.
3592 *
3593 * If you want it, it's yours. All I ask in return is that if you
3594 * figure out how to do this in a Bourne Shell script you send me
3595 * a copy.
3596 * sdcsvax!rmr or rmr@uscd
3597 *
3598 * Severely hacked over by John Gilmore to make a 4.2BSD compatible
3599 * subroutine. 11Mar86; hoptoad!gnu
3600 *
3601 * Modified by rmtodd@uokmax 6-28-87 -- when making an already existing dir,
3602 * subroutine didn't return EEXIST. It does now.
3603 */
3604
3605 /*
3606 * Make a directory.
3607 */
3608 #ifdef MKDIR_PROTOTYPE
3609 MKDIR_PROTOTYPE
3610 #else
3611 int
3612 mkdir (dpath, dmode)
3613 char *dpath;
3614 int dmode;
3615 #endif
3616 {
3617 int cpid, status, fd;
3618 struct stat statbuf;
3619
3620 if (stat (dpath, &statbuf) == 0)
3621 {
3622 errno = EEXIST; /* Stat worked, so it already exists */
3623 return -1;
3624 }
3625
3626 /* If stat fails for a reason other than non-existence, return error */
3627 if (errno != ENOENT)
3628 return -1;
3629
3630 synch_process_alive = 1;
3631 switch (cpid = fork ())
3632 {
3633
3634 case -1: /* Error in fork */
3635 return (-1); /* Errno is set already */
3636
3637 case 0: /* Child process */
3638 /*
3639 * Cheap hack to set mode of new directory. Since this
3640 * child process is going away anyway, we zap its umask.
3641 * FIXME, this won't suffice to set SUID, SGID, etc. on this
3642 * directory. Does anybody care?
3643 */
3644 status = umask (0); /* Get current umask */
3645 status = umask (status | (0777 & ~dmode)); /* Set for mkdir */
3646 fd = sys_open("/dev/null", 2);
3647 if (fd >= 0)
3648 {
3649 dup2 (fd, 0);
3650 dup2 (fd, 1);
3651 dup2 (fd, 2);
3652 }
3653 execl ("/bin/mkdir", "mkdir", dpath, (char *) 0);
3654 _exit (-1); /* Can't exec /bin/mkdir */
3655
3656 default: /* Parent process */
3657 wait_for_termination (cpid);
3658 }
3659
3660 if (synch_process_death != 0 || synch_process_retcode != 0)
3661 {
3662 errno = EIO; /* We don't know why, but */
3663 return -1; /* /bin/mkdir failed */
3664 }
3665
3666 return 0;
3667 }
3668 #endif /* not HAVE_MKDIR */
3669
3670 #ifndef HAVE_RMDIR
3671 int
3672 rmdir (dpath)
3673 char *dpath;
3674 {
3675 int cpid, status, fd;
3676 struct stat statbuf;
3677
3678 if (stat (dpath, &statbuf) != 0)
3679 {
3680 /* Stat just set errno. We don't have to */
3681 return -1;
3682 }
3683
3684 synch_process_alive = 1;
3685 switch (cpid = fork ())
3686 {
3687
3688 case -1: /* Error in fork */
3689 return (-1); /* Errno is set already */
3690
3691 case 0: /* Child process */
3692 fd = sys_open("/dev/null", 2);
3693 if (fd >= 0)
3694 {
3695 dup2 (fd, 0);
3696 dup2 (fd, 1);
3697 dup2 (fd, 2);
3698 }
3699 execl ("/bin/rmdir", "rmdir", dpath, (char *) 0);
3700 _exit (-1); /* Can't exec /bin/rmdir */
3701
3702 default: /* Parent process */
3703 wait_for_termination (cpid);
3704 }
3705
3706 if (synch_process_death != 0 || synch_process_retcode != 0)
3707 {
3708 errno = EIO; /* We don't know why, but */
3709 return -1; /* /bin/rmdir failed */
3710 }
3711
3712 return 0;
3713 }
3714 #endif /* !HAVE_RMDIR */
3715
3716
3717 \f
3718 /* Functions for VMS */
3719 #ifdef VMS
3720 #include "vms-pwd.h"
3721 #include <acldef.h>
3722 #include <chpdef.h>
3723 #include <jpidef.h>
3724
3725 /* Return as a string the VMS error string pertaining to STATUS.
3726 Reuses the same static buffer each time it is called. */
3727
3728 char *
3729 vmserrstr (status)
3730 int status; /* VMS status code */
3731 {
3732 int bufadr[2];
3733 short len;
3734 static char buf[257];
3735
3736 bufadr[0] = sizeof buf - 1;
3737 bufadr[1] = (int) buf;
3738 if (! (SYS$GETMSG (status, &len, bufadr, 0x1, 0) & 1))
3739 return "untranslatable VMS error status";
3740 buf[len] = '\0';
3741 return buf;
3742 }
3743
3744 #ifdef access
3745 #undef access
3746
3747 /* The following is necessary because 'access' emulation by VMS C (2.0) does
3748 * not work correctly. (It also doesn't work well in version 2.3.)
3749 */
3750
3751 #ifdef VMS4_4
3752
3753 #define DESCRIPTOR(name,string) struct dsc$descriptor_s name = \
3754 { strlen (string), DSC$K_DTYPE_T, DSC$K_CLASS_S, string }
3755
3756 typedef union {
3757 struct {
3758 unsigned short s_buflen;
3759 unsigned short s_code;
3760 char *s_bufadr;
3761 unsigned short *s_retlenadr;
3762 } s;
3763 int end;
3764 } item;
3765 #define buflen s.s_buflen
3766 #define code s.s_code
3767 #define bufadr s.s_bufadr
3768 #define retlenadr s.s_retlenadr
3769
3770 #define R_OK 4 /* test for read permission */
3771 #define W_OK 2 /* test for write permission */
3772 #define X_OK 1 /* test for execute (search) permission */
3773 #define F_OK 0 /* test for presence of file */
3774
3775 int
3776 sys_access (path, mode)
3777 char *path;
3778 int mode;
3779 {
3780 static char *user = NULL;
3781 char dir_fn[512];
3782
3783 /* translate possible directory spec into .DIR file name, so brain-dead
3784 * access can treat the directory like a file. */
3785 if (directory_file_name (path, dir_fn))
3786 path = dir_fn;
3787
3788 if (mode == F_OK)
3789 return access (path, mode);
3790 if (user == NULL && (user = (char *) getenv ("USER")) == NULL)
3791 return -1;
3792 {
3793 int stat;
3794 int flags;
3795 int acces;
3796 unsigned short int dummy;
3797 item itemlst[3];
3798 static int constant = ACL$C_FILE;
3799 DESCRIPTOR (path_desc, path);
3800 DESCRIPTOR (user_desc, user);
3801
3802 flags = 0;
3803 acces = 0;
3804 if ((mode & X_OK) && ((stat = access (path, mode)) < 0 || mode == X_OK))
3805 return stat;
3806 if (mode & R_OK)
3807 acces |= CHP$M_READ;
3808 if (mode & W_OK)
3809 acces |= CHP$M_WRITE;
3810 itemlst[0].buflen = sizeof (int);
3811 itemlst[0].code = CHP$_FLAGS;
3812 itemlst[0].bufadr = (char *) &flags;
3813 itemlst[0].retlenadr = &dummy;
3814 itemlst[1].buflen = sizeof (int);
3815 itemlst[1].code = CHP$_ACCESS;
3816 itemlst[1].bufadr = (char *) &acces;
3817 itemlst[1].retlenadr = &dummy;
3818 itemlst[2].end = CHP$_END;
3819 stat = SYS$CHECK_ACCESS (&constant, &path_desc, &user_desc, itemlst);
3820 return stat == SS$_NORMAL ? 0 : -1;
3821 }
3822 }
3823
3824 #else /* not VMS4_4 */
3825
3826 #include <prvdef.h>
3827 #define ACE$M_WRITE 2
3828 #define ACE$C_KEYID 1
3829
3830 static unsigned short memid, grpid;
3831 static unsigned int uic;
3832
3833 /* Called from init_sys_modes, so it happens not very often
3834 but at least each time Emacs is loaded. */
3835 sys_access_reinit ()
3836 {
3837 uic = 0;
3838 }
3839
3840 int
3841 sys_access (filename, type)
3842 char * filename;
3843 int type;
3844 {
3845 struct FAB fab;
3846 struct XABPRO xab;
3847 int status, size, i, typecode, acl_controlled;
3848 unsigned int *aclptr, *aclend, aclbuf[60];
3849 union prvdef prvmask;
3850
3851 /* Get UIC and GRP values for protection checking. */
3852 if (uic == 0)
3853 {
3854 status = LIB$GETJPI (&JPI$_UIC, 0, 0, &uic, 0, 0);
3855 if (! (status & 1))
3856 return -1;
3857 memid = uic & 0xFFFF;
3858 grpid = uic >> 16;
3859 }
3860
3861 if (type != 2) /* not checking write access */
3862 return access (filename, type);
3863
3864 /* Check write protection. */
3865
3866 #define CHECKPRIV(bit) (prvmask.bit)
3867 #define WRITABLE(field) (! ((xab.xab$w_pro >> field) & XAB$M_NOWRITE))
3868
3869 /* Find privilege bits */
3870 status = SYS$SETPRV (0, 0, 0, prvmask);
3871 if (! (status & 1))
3872 error ("Unable to find privileges: %s", vmserrstr (status));
3873 if (CHECKPRIV (PRV$V_BYPASS))
3874 return 0; /* BYPASS enabled */
3875 fab = cc$rms_fab;
3876 fab.fab$b_fac = FAB$M_GET;
3877 fab.fab$l_fna = filename;
3878 fab.fab$b_fns = strlen (filename);
3879 fab.fab$l_xab = &xab;
3880 xab = cc$rms_xabpro;
3881 xab.xab$l_aclbuf = aclbuf;
3882 xab.xab$w_aclsiz = sizeof (aclbuf);
3883 status = SYS$OPEN (&fab, 0, 0);
3884 if (! (status & 1))
3885 return -1;
3886 SYS$CLOSE (&fab, 0, 0);
3887 /* Check system access */
3888 if (CHECKPRIV (PRV$V_SYSPRV) && WRITABLE (XAB$V_SYS))
3889 return 0;
3890 /* Check ACL entries, if any */
3891 acl_controlled = 0;
3892 if (xab.xab$w_acllen > 0)
3893 {
3894 aclptr = aclbuf;
3895 aclend = &aclbuf[xab.xab$w_acllen / 4];
3896 while (*aclptr && aclptr < aclend)
3897 {
3898 size = (*aclptr & 0xff) / 4;
3899 typecode = (*aclptr >> 8) & 0xff;
3900 if (typecode == ACE$C_KEYID)
3901 for (i = size - 1; i > 1; i--)
3902 if (aclptr[i] == uic)
3903 {
3904 acl_controlled = 1;
3905 if (aclptr[1] & ACE$M_WRITE)
3906 return 0; /* Write access through ACL */
3907 }
3908 aclptr = &aclptr[size];
3909 }
3910 if (acl_controlled) /* ACL specified, prohibits write access */
3911 return -1;
3912 }
3913 /* No ACL entries specified, check normal protection */
3914 if (WRITABLE (XAB$V_WLD)) /* World writable */
3915 return 0;
3916 if (WRITABLE (XAB$V_GRP) &&
3917 (unsigned short) (xab.xab$l_uic >> 16) == grpid)
3918 return 0; /* Group writable */
3919 if (WRITABLE (XAB$V_OWN) &&
3920 (xab.xab$l_uic & 0xFFFF) == memid)
3921 return 0; /* Owner writable */
3922
3923 return -1; /* Not writable */
3924 }
3925 #endif /* not VMS4_4 */
3926 #endif /* access */
3927
3928 static char vtbuf[NAM$C_MAXRSS+1];
3929
3930 /* translate a vms file spec to a unix path */
3931 char *
3932 sys_translate_vms (vfile)
3933 char * vfile;
3934 {
3935 char * p;
3936 char * targ;
3937
3938 if (!vfile)
3939 return 0;
3940
3941 targ = vtbuf;
3942
3943 /* leading device or logical name is a root directory */
3944 if (p = strchr (vfile, ':'))
3945 {
3946 *targ++ = '/';
3947 while (vfile < p)
3948 *targ++ = *vfile++;
3949 vfile++;
3950 *targ++ = '/';
3951 }
3952 p = vfile;
3953 if (*p == '[' || *p == '<')
3954 {
3955 while (*++vfile != *p + 2)
3956 switch (*vfile)
3957 {
3958 case '.':
3959 if (vfile[-1] == *p)
3960 *targ++ = '.';
3961 *targ++ = '/';
3962 break;
3963
3964 case '-':
3965 *targ++ = '.';
3966 *targ++ = '.';
3967 break;
3968
3969 default:
3970 *targ++ = *vfile;
3971 break;
3972 }
3973 vfile++;
3974 *targ++ = '/';
3975 }
3976 while (*vfile)
3977 *targ++ = *vfile++;
3978
3979 return vtbuf;
3980 }
3981
3982 static char utbuf[NAM$C_MAXRSS+1];
3983
3984 /* translate a unix path to a VMS file spec */
3985 char *
3986 sys_translate_unix (ufile)
3987 char * ufile;
3988 {
3989 int slash_seen = 0;
3990 char *p;
3991 char * targ;
3992
3993 if (!ufile)
3994 return 0;
3995
3996 targ = utbuf;
3997
3998 if (*ufile == '/')
3999 {
4000 ufile++;
4001 }
4002
4003 while (*ufile)
4004 {
4005 switch (*ufile)
4006 {
4007 case '/':
4008 if (slash_seen)
4009 if (index (&ufile[1], '/'))
4010 *targ++ = '.';
4011 else
4012 *targ++ = ']';
4013 else
4014 {
4015 *targ++ = ':';
4016 if (index (&ufile[1], '/'))
4017 *targ++ = '[';
4018 slash_seen = 1;
4019 }
4020 break;
4021
4022 case '.':
4023 if (strncmp (ufile, "./", 2) == 0)
4024 {
4025 if (!slash_seen)
4026 {
4027 *targ++ = '[';
4028 slash_seen = 1;
4029 }
4030 ufile++; /* skip the dot */
4031 if (index (&ufile[1], '/'))
4032 *targ++ = '.';
4033 else
4034 *targ++ = ']';
4035 }
4036 else if (strncmp (ufile, "../", 3) == 0)
4037 {
4038 if (!slash_seen)
4039 {
4040 *targ++ = '[';
4041 slash_seen = 1;
4042 }
4043 *targ++ = '-';
4044 ufile += 2; /* skip the dots */
4045 if (index (&ufile[1], '/'))
4046 *targ++ = '.';
4047 else
4048 *targ++ = ']';
4049 }
4050 else
4051 *targ++ = *ufile;
4052 break;
4053
4054 default:
4055 *targ++ = *ufile;
4056 break;
4057 }
4058 ufile++;
4059 }
4060 *targ = '\0';
4061
4062 return utbuf;
4063 }
4064
4065 char *
4066 getwd (pathname)
4067 char *pathname;
4068 {
4069 char *ptr, *val;
4070 extern char *getcwd ();
4071
4072 #define MAXPATHLEN 1024
4073
4074 ptr = xmalloc (MAXPATHLEN);
4075 val = getcwd (ptr, MAXPATHLEN);
4076 if (val == 0)
4077 {
4078 xfree (ptr);
4079 return val;
4080 }
4081 strcpy (pathname, ptr);
4082 xfree (ptr);
4083
4084 return pathname;
4085 }
4086
4087 getppid ()
4088 {
4089 long item_code = JPI$_OWNER;
4090 unsigned long parent_id;
4091 int status;
4092
4093 if (((status = LIB$GETJPI (&item_code, 0, 0, &parent_id)) & 1) == 0)
4094 {
4095 errno = EVMSERR;
4096 vaxc$errno = status;
4097 return -1;
4098 }
4099 return parent_id;
4100 }
4101
4102 #undef getuid
4103 unsigned
4104 sys_getuid ()
4105 {
4106 return (getgid () << 16) | getuid ();
4107 }
4108
4109 int
4110 sys_read (fildes, buf, nbyte)
4111 int fildes;
4112 char *buf;
4113 unsigned int nbyte;
4114 {
4115 return read (fildes, buf, (nbyte < MAXIOSIZE ? nbyte : MAXIOSIZE));
4116 }
4117
4118 #if 0
4119 int
4120 sys_write (fildes, buf, nbyte)
4121 int fildes;
4122 char *buf;
4123 unsigned int nbyte;
4124 {
4125 register int nwrote, rtnval = 0;
4126
4127 while (nbyte > MAXIOSIZE && (nwrote = write (fildes, buf, MAXIOSIZE)) > 0) {
4128 nbyte -= nwrote;
4129 buf += nwrote;
4130 rtnval += nwrote;
4131 }
4132 if (nwrote < 0)
4133 return rtnval ? rtnval : -1;
4134 if ((nwrote = write (fildes, buf, nbyte)) < 0)
4135 return rtnval ? rtnval : -1;
4136 return (rtnval + nwrote);
4137 }
4138 #endif /* 0 */
4139
4140 /*
4141 * VAX/VMS VAX C RTL really loses. It insists that records
4142 * end with a newline (carriage return) character, and if they
4143 * don't it adds one (nice of it isn't it!)
4144 *
4145 * Thus we do this stupidity below.
4146 */
4147
4148 int
4149 sys_write (fildes, buf, nbytes)
4150 int fildes;
4151 char *buf;
4152 unsigned int nbytes;
4153 {
4154 register char *p;
4155 register char *e;
4156 int sum = 0;
4157 struct stat st;
4158
4159 fstat (fildes, &st);
4160 p = buf;
4161 while (nbytes > 0)
4162 {
4163 int len, retval;
4164
4165 /* Handle fixed-length files with carriage control. */
4166 if (st.st_fab_rfm == FAB$C_FIX
4167 && ((st.st_fab_rat & (FAB$M_FTN | FAB$M_CR)) != 0))
4168 {
4169 len = st.st_fab_mrs;
4170 retval = write (fildes, p, min (len, nbytes));
4171 if (retval != len)
4172 return -1;
4173 retval++; /* This skips the implied carriage control */
4174 }
4175 else
4176 {
4177 e = p + min (MAXIOSIZE, nbytes) - 1;
4178 while (*e != '\n' && e > p) e--;
4179 if (p == e) /* Ok.. so here we add a newline... sigh. */
4180 e = p + min (MAXIOSIZE, nbytes) - 1;
4181 len = e + 1 - p;
4182 retval = write (fildes, p, len);
4183 if (retval != len)
4184 return -1;
4185 }
4186 p += retval;
4187 sum += retval;
4188 nbytes -= retval;
4189 }
4190 return sum;
4191 }
4192
4193 /* Create file NEW copying its attributes from file OLD. If
4194 OLD is 0 or does not exist, create based on the value of
4195 vms_stmlf_recfm. */
4196
4197 /* Protection value the file should ultimately have.
4198 Set by create_copy_attrs, and use by rename_sansversions. */
4199 static unsigned short int fab_final_pro;
4200
4201 int
4202 creat_copy_attrs (old, new)
4203 char *old, *new;
4204 {
4205 struct FAB fab = cc$rms_fab;
4206 struct XABPRO xabpro;
4207 char aclbuf[256]; /* Choice of size is arbitrary. See below. */
4208 extern int vms_stmlf_recfm;
4209
4210 if (old)
4211 {
4212 fab.fab$b_fac = FAB$M_GET;
4213 fab.fab$l_fna = old;
4214 fab.fab$b_fns = strlen (old);
4215 fab.fab$l_xab = (char *) &xabpro;
4216 xabpro = cc$rms_xabpro;
4217 xabpro.xab$l_aclbuf = aclbuf;
4218 xabpro.xab$w_aclsiz = sizeof aclbuf;
4219 /* Call $OPEN to fill in the fab & xabpro fields. */
4220 if (SYS$OPEN (&fab, 0, 0) & 1)
4221 {
4222 SYS$CLOSE (&fab, 0, 0);
4223 fab.fab$l_alq = 0; /* zero the allocation quantity */
4224 if (xabpro.xab$w_acllen > 0)
4225 {
4226 if (xabpro.xab$w_acllen > sizeof aclbuf)
4227 /* If the acl buffer was too short, redo open with longer one.
4228 Wouldn't need to do this if there were some system imposed
4229 limit on the size of an ACL, but I can't find any such. */
4230 {
4231 xabpro.xab$l_aclbuf = (char *) alloca (xabpro.xab$w_acllen);
4232 xabpro.xab$w_aclsiz = xabpro.xab$w_acllen;
4233 if (SYS$OPEN (&fab, 0, 0) & 1)
4234 SYS$CLOSE (&fab, 0, 0);
4235 else
4236 old = 0;
4237 }
4238 }
4239 else
4240 xabpro.xab$l_aclbuf = 0;
4241 }
4242 else
4243 old = 0;
4244 }
4245 fab.fab$l_fna = new;
4246 fab.fab$b_fns = strlen (new);
4247 if (!old)
4248 {
4249 fab.fab$l_xab = 0;
4250 fab.fab$b_rfm = vms_stmlf_recfm ? FAB$C_STMLF : FAB$C_VAR;
4251 fab.fab$b_rat = FAB$M_CR;
4252 }
4253
4254 /* Set the file protections such that we will be able to manipulate
4255 this file. Once we are done writing and renaming it, we will set
4256 the protections back. */
4257 if (old)
4258 fab_final_pro = xabpro.xab$w_pro;
4259 else
4260 SYS$SETDFPROT (0, &fab_final_pro);
4261 xabpro.xab$w_pro &= 0xff0f; /* set O:rewd for now. This is set back later. */
4262
4263 /* Create the new file with either default attrs or attrs copied
4264 from old file. */
4265 if (!(SYS$CREATE (&fab, 0, 0) & 1))
4266 return -1;
4267 SYS$CLOSE (&fab, 0, 0);
4268 /* As this is a "replacement" for creat, return a file descriptor
4269 opened for writing. */
4270 return open (new, O_WRONLY);
4271 }
4272
4273 #ifdef creat
4274 #undef creat
4275 #include <varargs.h>
4276 #ifdef __GNUC__
4277 #ifndef va_count
4278 #define va_count(X) ((X) = *(((int *) &(va_alist)) - 1))
4279 #endif
4280 #endif
4281
4282 sys_creat (va_alist)
4283 va_dcl
4284 {
4285 va_list list_incrementer;
4286 char *name;
4287 int mode;
4288 int rfd; /* related file descriptor */
4289 int fd; /* Our new file descriptor */
4290 int count;
4291 struct stat st_buf;
4292 char rfm[12];
4293 char rat[15];
4294 char mrs[13];
4295 char fsz[13];
4296 extern int vms_stmlf_recfm;
4297
4298 va_count (count);
4299 va_start (list_incrementer);
4300 name = va_arg (list_incrementer, char *);
4301 mode = va_arg (list_incrementer, int);
4302 if (count > 2)
4303 rfd = va_arg (list_incrementer, int);
4304 va_end (list_incrementer);
4305 if (count > 2)
4306 {
4307 /* Use information from the related file descriptor to set record
4308 format of the newly created file. */
4309 fstat (rfd, &st_buf);
4310 switch (st_buf.st_fab_rfm)
4311 {
4312 case FAB$C_FIX:
4313 strcpy (rfm, "rfm = fix");
4314 sprintf (mrs, "mrs = %d", st_buf.st_fab_mrs);
4315 strcpy (rat, "rat = ");
4316 if (st_buf.st_fab_rat & FAB$M_CR)
4317 strcat (rat, "cr");
4318 else if (st_buf.st_fab_rat & FAB$M_FTN)
4319 strcat (rat, "ftn");
4320 else if (st_buf.st_fab_rat & FAB$M_PRN)
4321 strcat (rat, "prn");
4322 if (st_buf.st_fab_rat & FAB$M_BLK)
4323 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4324 strcat (rat, ", blk");
4325 else
4326 strcat (rat, "blk");
4327 return creat (name, 0, rfm, rat, mrs);
4328
4329 case FAB$C_VFC:
4330 strcpy (rfm, "rfm = vfc");
4331 sprintf (fsz, "fsz = %d", st_buf.st_fab_fsz);
4332 strcpy (rat, "rat = ");
4333 if (st_buf.st_fab_rat & FAB$M_CR)
4334 strcat (rat, "cr");
4335 else if (st_buf.st_fab_rat & FAB$M_FTN)
4336 strcat (rat, "ftn");
4337 else if (st_buf.st_fab_rat & FAB$M_PRN)
4338 strcat (rat, "prn");
4339 if (st_buf.st_fab_rat & FAB$M_BLK)
4340 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4341 strcat (rat, ", blk");
4342 else
4343 strcat (rat, "blk");
4344 return creat (name, 0, rfm, rat, fsz);
4345
4346 case FAB$C_STM:
4347 strcpy (rfm, "rfm = stm");
4348 break;
4349
4350 case FAB$C_STMCR:
4351 strcpy (rfm, "rfm = stmcr");
4352 break;
4353
4354 case FAB$C_STMLF:
4355 strcpy (rfm, "rfm = stmlf");
4356 break;
4357
4358 case FAB$C_UDF:
4359 strcpy (rfm, "rfm = udf");
4360 break;
4361
4362 case FAB$C_VAR:
4363 strcpy (rfm, "rfm = var");
4364 break;
4365 }
4366 strcpy (rat, "rat = ");
4367 if (st_buf.st_fab_rat & FAB$M_CR)
4368 strcat (rat, "cr");
4369 else if (st_buf.st_fab_rat & FAB$M_FTN)
4370 strcat (rat, "ftn");
4371 else if (st_buf.st_fab_rat & FAB$M_PRN)
4372 strcat (rat, "prn");
4373 if (st_buf.st_fab_rat & FAB$M_BLK)
4374 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4375 strcat (rat, ", blk");
4376 else
4377 strcat (rat, "blk");
4378 }
4379 else
4380 {
4381 strcpy (rfm, vms_stmlf_recfm ? "rfm = stmlf" : "rfm=var");
4382 strcpy (rat, "rat=cr");
4383 }
4384 /* Until the VAX C RTL fixes the many bugs with modes, always use
4385 mode 0 to get the user's default protection. */
4386 fd = creat (name, 0, rfm, rat);
4387 if (fd < 0 && errno == EEXIST)
4388 {
4389 if (unlink (name) < 0)
4390 report_file_error ("delete", build_string (name));
4391 fd = creat (name, 0, rfm, rat);
4392 }
4393 return fd;
4394 }
4395 #endif /* creat */
4396
4397 /* fwrite to stdout is S L O W. Speed it up by using fputc...*/
4398 sys_fwrite (ptr, size, num, fp)
4399 register char * ptr;
4400 FILE * fp;
4401 {
4402 register int tot = num * size;
4403
4404 while (tot--)
4405 fputc (*ptr++, fp);
4406 }
4407
4408 /*
4409 * The VMS C library routine creat actually creates a new version of an
4410 * existing file rather than truncating the old version. There are times
4411 * when this is not the desired behavior, for instance, when writing an
4412 * auto save file (you only want one version), or when you don't have
4413 * write permission in the directory containing the file (but the file
4414 * itself is writable). Hence this routine, which is equivalent to
4415 * "close (creat (fn, 0));" on Unix if fn already exists.
4416 */
4417 int
4418 vms_truncate (fn)
4419 char *fn;
4420 {
4421 struct FAB xfab = cc$rms_fab;
4422 struct RAB xrab = cc$rms_rab;
4423 int status;
4424
4425 xfab.fab$l_fop = FAB$M_TEF; /* free allocated but unused blocks on close */
4426 xfab.fab$b_fac = FAB$M_TRN | FAB$M_GET; /* allow truncate and get access */
4427 xfab.fab$b_shr = FAB$M_NIL; /* allow no sharing - file must be locked */
4428 xfab.fab$l_fna = fn;
4429 xfab.fab$b_fns = strlen (fn);
4430 xfab.fab$l_dna = ";0"; /* default to latest version of the file */
4431 xfab.fab$b_dns = 2;
4432 xrab.rab$l_fab = &xfab;
4433
4434 /* This gibberish opens the file, positions to the first record, and
4435 deletes all records from there until the end of file. */
4436 if ((SYS$OPEN (&xfab) & 01) == 01)
4437 {
4438 if ((SYS$CONNECT (&xrab) & 01) == 01 &&
4439 (SYS$FIND (&xrab) & 01) == 01 &&
4440 (SYS$TRUNCATE (&xrab) & 01) == 01)
4441 status = 0;
4442 else
4443 status = -1;
4444 }
4445 else
4446 status = -1;
4447 SYS$CLOSE (&xfab);
4448 return status;
4449 }
4450
4451 /* Define this symbol to actually read SYSUAF.DAT. This requires either
4452 SYSPRV or a readable SYSUAF.DAT. */
4453
4454 #ifdef READ_SYSUAF
4455 /*
4456 * getuaf.c
4457 *
4458 * Routine to read the VMS User Authorization File and return
4459 * a specific user's record.
4460 */
4461
4462 static struct UAF retuaf;
4463
4464 struct UAF *
4465 get_uaf_name (uname)
4466 char * uname;
4467 {
4468 register status;
4469 struct FAB uaf_fab;
4470 struct RAB uaf_rab;
4471
4472 uaf_fab = cc$rms_fab;
4473 uaf_rab = cc$rms_rab;
4474 /* initialize fab fields */
4475 uaf_fab.fab$l_fna = "SYS$SYSTEM:SYSUAF.DAT";
4476 uaf_fab.fab$b_fns = 21;
4477 uaf_fab.fab$b_fac = FAB$M_GET;
4478 uaf_fab.fab$b_org = FAB$C_IDX;
4479 uaf_fab.fab$b_shr = FAB$M_GET|FAB$M_PUT|FAB$M_UPD|FAB$M_DEL;
4480 /* initialize rab fields */
4481 uaf_rab.rab$l_fab = &uaf_fab;
4482 /* open the User Authorization File */
4483 status = SYS$OPEN (&uaf_fab);
4484 if (!(status&1))
4485 {
4486 errno = EVMSERR;
4487 vaxc$errno = status;
4488 return 0;
4489 }
4490 status = SYS$CONNECT (&uaf_rab);
4491 if (!(status&1))
4492 {
4493 errno = EVMSERR;
4494 vaxc$errno = status;
4495 return 0;
4496 }
4497 /* read the requested record - index is in uname */
4498 uaf_rab.rab$l_kbf = uname;
4499 uaf_rab.rab$b_ksz = strlen (uname);
4500 uaf_rab.rab$b_rac = RAB$C_KEY;
4501 uaf_rab.rab$l_ubf = (char *)&retuaf;
4502 uaf_rab.rab$w_usz = sizeof retuaf;
4503 status = SYS$GET (&uaf_rab);
4504 if (!(status&1))
4505 {
4506 errno = EVMSERR;
4507 vaxc$errno = status;
4508 return 0;
4509 }
4510 /* close the User Authorization File */
4511 status = SYS$DISCONNECT (&uaf_rab);
4512 if (!(status&1))
4513 {
4514 errno = EVMSERR;
4515 vaxc$errno = status;
4516 return 0;
4517 }
4518 status = SYS$CLOSE (&uaf_fab);
4519 if (!(status&1))
4520 {
4521 errno = EVMSERR;
4522 vaxc$errno = status;
4523 return 0;
4524 }
4525 return &retuaf;
4526 }
4527
4528 struct UAF *
4529 get_uaf_uic (uic)
4530 unsigned long uic;
4531 {
4532 register status;
4533 struct FAB uaf_fab;
4534 struct RAB uaf_rab;
4535
4536 uaf_fab = cc$rms_fab;
4537 uaf_rab = cc$rms_rab;
4538 /* initialize fab fields */
4539 uaf_fab.fab$l_fna = "SYS$SYSTEM:SYSUAF.DAT";
4540 uaf_fab.fab$b_fns = 21;
4541 uaf_fab.fab$b_fac = FAB$M_GET;
4542 uaf_fab.fab$b_org = FAB$C_IDX;
4543 uaf_fab.fab$b_shr = FAB$M_GET|FAB$M_PUT|FAB$M_UPD|FAB$M_DEL;
4544 /* initialize rab fields */
4545 uaf_rab.rab$l_fab = &uaf_fab;
4546 /* open the User Authorization File */
4547 status = SYS$OPEN (&uaf_fab);
4548 if (!(status&1))
4549 {
4550 errno = EVMSERR;
4551 vaxc$errno = status;
4552 return 0;
4553 }
4554 status = SYS$CONNECT (&uaf_rab);
4555 if (!(status&1))
4556 {
4557 errno = EVMSERR;
4558 vaxc$errno = status;
4559 return 0;
4560 }
4561 /* read the requested record - index is in uic */
4562 uaf_rab.rab$b_krf = 1; /* 1st alternate key */
4563 uaf_rab.rab$l_kbf = (char *) &uic;
4564 uaf_rab.rab$b_ksz = sizeof uic;
4565 uaf_rab.rab$b_rac = RAB$C_KEY;
4566 uaf_rab.rab$l_ubf = (char *)&retuaf;
4567 uaf_rab.rab$w_usz = sizeof retuaf;
4568 status = SYS$GET (&uaf_rab);
4569 if (!(status&1))
4570 {
4571 errno = EVMSERR;
4572 vaxc$errno = status;
4573 return 0;
4574 }
4575 /* close the User Authorization File */
4576 status = SYS$DISCONNECT (&uaf_rab);
4577 if (!(status&1))
4578 {
4579 errno = EVMSERR;
4580 vaxc$errno = status;
4581 return 0;
4582 }
4583 status = SYS$CLOSE (&uaf_fab);
4584 if (!(status&1))
4585 {
4586 errno = EVMSERR;
4587 vaxc$errno = status;
4588 return 0;
4589 }
4590 return &retuaf;
4591 }
4592
4593 static struct passwd retpw;
4594
4595 struct passwd *
4596 cnv_uaf_pw (up)
4597 struct UAF * up;
4598 {
4599 char * ptr;
4600
4601 /* copy these out first because if the username is 32 chars, the next
4602 section will overwrite the first byte of the UIC */
4603 retpw.pw_uid = up->uaf$w_mem;
4604 retpw.pw_gid = up->uaf$w_grp;
4605
4606 /* I suppose this is not the best style, to possibly overwrite one
4607 byte beyond the end of the field, but what the heck... */
4608 ptr = &up->uaf$t_username[UAF$S_USERNAME];
4609 while (ptr[-1] == ' ')
4610 ptr--;
4611 *ptr = '\0';
4612 strcpy (retpw.pw_name, up->uaf$t_username);
4613
4614 /* the rest of these are counted ascii strings */
4615 strncpy (retpw.pw_gecos, &up->uaf$t_owner[1], up->uaf$t_owner[0]);
4616 retpw.pw_gecos[up->uaf$t_owner[0]] = '\0';
4617 strncpy (retpw.pw_dir, &up->uaf$t_defdev[1], up->uaf$t_defdev[0]);
4618 retpw.pw_dir[up->uaf$t_defdev[0]] = '\0';
4619 strncat (retpw.pw_dir, &up->uaf$t_defdir[1], up->uaf$t_defdir[0]);
4620 retpw.pw_dir[up->uaf$t_defdev[0] + up->uaf$t_defdir[0]] = '\0';
4621 strncpy (retpw.pw_shell, &up->uaf$t_defcli[1], up->uaf$t_defcli[0]);
4622 retpw.pw_shell[up->uaf$t_defcli[0]] = '\0';
4623
4624 return &retpw;
4625 }
4626 #else /* not READ_SYSUAF */
4627 static struct passwd retpw;
4628 #endif /* not READ_SYSUAF */
4629
4630 struct passwd *
4631 getpwnam (name)
4632 char * name;
4633 {
4634 #ifdef READ_SYSUAF
4635 struct UAF *up;
4636 #else
4637 char * user;
4638 char * dir;
4639 unsigned char * full;
4640 #endif /* READ_SYSUAF */
4641 char *ptr = name;
4642
4643 while (*ptr)
4644 {
4645 if ('a' <= *ptr && *ptr <= 'z')
4646 *ptr -= 040;
4647 ptr++;
4648 }
4649 #ifdef READ_SYSUAF
4650 if (!(up = get_uaf_name (name)))
4651 return 0;
4652 return cnv_uaf_pw (up);
4653 #else
4654 if (strcmp (name, getenv ("USER")) == 0)
4655 {
4656 retpw.pw_uid = getuid ();
4657 retpw.pw_gid = getgid ();
4658 strcpy (retpw.pw_name, name);
4659 if (full = egetenv ("FULLNAME"))
4660 strcpy (retpw.pw_gecos, full);
4661 else
4662 *retpw.pw_gecos = '\0';
4663 strcpy (retpw.pw_dir, egetenv ("HOME"));
4664 *retpw.pw_shell = '\0';
4665 return &retpw;
4666 }
4667 else
4668 return 0;
4669 #endif /* not READ_SYSUAF */
4670 }
4671
4672 struct passwd *
4673 getpwuid (uid)
4674 unsigned long uid;
4675 {
4676 #ifdef READ_SYSUAF
4677 struct UAF * up;
4678
4679 if (!(up = get_uaf_uic (uid)))
4680 return 0;
4681 return cnv_uaf_pw (up);
4682 #else
4683 if (uid == sys_getuid ())
4684 return getpwnam (egetenv ("USER"));
4685 else
4686 return 0;
4687 #endif /* not READ_SYSUAF */
4688 }
4689
4690 /* return total address space available to the current process. This is
4691 the sum of the current p0 size, p1 size and free page table entries
4692 available. */
4693 vlimit ()
4694 {
4695 int item_code;
4696 unsigned long free_pages;
4697 unsigned long frep0va;
4698 unsigned long frep1va;
4699 register status;
4700
4701 item_code = JPI$_FREPTECNT;
4702 if (((status = LIB$GETJPI (&item_code, 0, 0, &free_pages)) & 1) == 0)
4703 {
4704 errno = EVMSERR;
4705 vaxc$errno = status;
4706 return -1;
4707 }
4708 free_pages *= 512;
4709
4710 item_code = JPI$_FREP0VA;
4711 if (((status = LIB$GETJPI (&item_code, 0, 0, &frep0va)) & 1) == 0)
4712 {
4713 errno = EVMSERR;
4714 vaxc$errno = status;
4715 return -1;
4716 }
4717 item_code = JPI$_FREP1VA;
4718 if (((status = LIB$GETJPI (&item_code, 0, 0, &frep1va)) & 1) == 0)
4719 {
4720 errno = EVMSERR;
4721 vaxc$errno = status;
4722 return -1;
4723 }
4724
4725 return free_pages + frep0va + (0x7fffffff - frep1va);
4726 }
4727
4728 define_logical_name (varname, string)
4729 char *varname;
4730 char *string;
4731 {
4732 struct dsc$descriptor_s strdsc =
4733 {strlen (string), DSC$K_DTYPE_T, DSC$K_CLASS_S, string};
4734 struct dsc$descriptor_s envdsc =
4735 {strlen (varname), DSC$K_DTYPE_T, DSC$K_CLASS_S, varname};
4736 struct dsc$descriptor_s lnmdsc =
4737 {7, DSC$K_DTYPE_T, DSC$K_CLASS_S, "LNM$JOB"};
4738
4739 return LIB$SET_LOGICAL (&envdsc, &strdsc, &lnmdsc, 0, 0);
4740 }
4741
4742 delete_logical_name (varname)
4743 char *varname;
4744 {
4745 struct dsc$descriptor_s envdsc =
4746 {strlen (varname), DSC$K_DTYPE_T, DSC$K_CLASS_S, varname};
4747 struct dsc$descriptor_s lnmdsc =
4748 {7, DSC$K_DTYPE_T, DSC$K_CLASS_S, "LNM$JOB"};
4749
4750 return LIB$DELETE_LOGICAL (&envdsc, &lnmdsc);
4751 }
4752
4753 ulimit ()
4754 {}
4755
4756 setpgrp ()
4757 {}
4758
4759 execvp ()
4760 {
4761 error ("execvp system call not implemented");
4762 }
4763
4764 int
4765 rename (from, to)
4766 char *from, *to;
4767 {
4768 int status;
4769 struct FAB from_fab = cc$rms_fab, to_fab = cc$rms_fab;
4770 struct NAM from_nam = cc$rms_nam, to_nam = cc$rms_nam;
4771 char from_esn[NAM$C_MAXRSS];
4772 char to_esn[NAM$C_MAXRSS];
4773
4774 from_fab.fab$l_fna = from;
4775 from_fab.fab$b_fns = strlen (from);
4776 from_fab.fab$l_nam = &from_nam;
4777 from_fab.fab$l_fop = FAB$M_NAM;
4778
4779 from_nam.nam$l_esa = from_esn;
4780 from_nam.nam$b_ess = sizeof from_esn;
4781
4782 to_fab.fab$l_fna = to;
4783 to_fab.fab$b_fns = strlen (to);
4784 to_fab.fab$l_nam = &to_nam;
4785 to_fab.fab$l_fop = FAB$M_NAM;
4786
4787 to_nam.nam$l_esa = to_esn;
4788 to_nam.nam$b_ess = sizeof to_esn;
4789
4790 status = SYS$RENAME (&from_fab, 0, 0, &to_fab);
4791
4792 if (status & 1)
4793 return 0;
4794 else
4795 {
4796 if (status == RMS$_DEV)
4797 errno = EXDEV;
4798 else
4799 errno = EVMSERR;
4800 vaxc$errno = status;
4801 return -1;
4802 }
4803 }
4804
4805 /* This function renames a file like `rename', but it strips
4806 the version number from the "to" filename, such that the "to" file is
4807 will always be a new version. It also sets the file protection once it is
4808 finished. The protection that we will use is stored in fab_final_pro,
4809 and was set when we did a creat_copy_attrs to create the file that we
4810 are renaming.
4811
4812 We could use the chmod function, but Eunichs uses 3 bits per user category
4813 to describe the protection, and VMS uses 4 (write and delete are separate
4814 bits). To maintain portability, the VMS implementation of `chmod' wires
4815 the W and D bits together. */
4816
4817
4818 static struct fibdef fib; /* We need this initialized to zero */
4819 char vms_file_written[NAM$C_MAXRSS];
4820
4821 int
4822 rename_sans_version (from,to)
4823 char *from, *to;
4824 {
4825 short int chan;
4826 int stat;
4827 short int iosb[4];
4828 int status;
4829 struct FAB to_fab = cc$rms_fab;
4830 struct NAM to_nam = cc$rms_nam;
4831 struct dsc$descriptor fib_d ={sizeof (fib),0,0,(char*) &fib};
4832 struct dsc$descriptor fib_attr[2]
4833 = {{sizeof (fab_final_pro),ATR$C_FPRO,0,(char*) &fab_final_pro},{0,0,0,0}};
4834 char to_esn[NAM$C_MAXRSS];
4835
4836 $DESCRIPTOR (disk,to_esn);
4837
4838 to_fab.fab$l_fna = to;
4839 to_fab.fab$b_fns = strlen (to);
4840 to_fab.fab$l_nam = &to_nam;
4841 to_fab.fab$l_fop = FAB$M_NAM;
4842
4843 to_nam.nam$l_esa = to_esn;
4844 to_nam.nam$b_ess = sizeof to_esn;
4845
4846 status = SYS$PARSE (&to_fab, 0, 0); /* figure out the full file name */
4847
4848 if (to_nam.nam$l_fnb && NAM$M_EXP_VER)
4849 *(to_nam.nam$l_ver) = '\0';
4850
4851 stat = rename (from, to_esn);
4852 if (stat < 0)
4853 return stat;
4854
4855 strcpy (vms_file_written, to_esn);
4856
4857 to_fab.fab$l_fna = vms_file_written; /* this points to the versionless name */
4858 to_fab.fab$b_fns = strlen (vms_file_written);
4859
4860 /* Now set the file protection to the correct value */
4861 SYS$OPEN (&to_fab, 0, 0); /* This fills in the nam$w_fid fields */
4862
4863 /* Copy these fields into the fib */
4864 fib.fib$r_fid_overlay.fib$w_fid[0] = to_nam.nam$w_fid[0];
4865 fib.fib$r_fid_overlay.fib$w_fid[1] = to_nam.nam$w_fid[1];
4866 fib.fib$r_fid_overlay.fib$w_fid[2] = to_nam.nam$w_fid[2];
4867
4868 SYS$CLOSE (&to_fab, 0, 0);
4869
4870 stat = SYS$ASSIGN (&disk, &chan, 0, 0); /* open a channel to the disk */
4871 if (!stat)
4872 LIB$SIGNAL (stat);
4873 stat = SYS$QIOW (0, chan, IO$_MODIFY, iosb, 0, 0, &fib_d,
4874 0, 0, 0, &fib_attr, 0);
4875 if (!stat)
4876 LIB$SIGNAL (stat);
4877 stat = SYS$DASSGN (chan);
4878 if (!stat)
4879 LIB$SIGNAL (stat);
4880 strcpy (vms_file_written, to_esn); /* We will write this to the terminal*/
4881 return 0;
4882 }
4883
4884 link (file, new)
4885 char * file, * new;
4886 {
4887 register status;
4888 struct FAB fab;
4889 struct NAM nam;
4890 unsigned short fid[3];
4891 char esa[NAM$C_MAXRSS];
4892
4893 fab = cc$rms_fab;
4894 fab.fab$l_fop = FAB$M_OFP;
4895 fab.fab$l_fna = file;
4896 fab.fab$b_fns = strlen (file);
4897 fab.fab$l_nam = &nam;
4898
4899 nam = cc$rms_nam;
4900 nam.nam$l_esa = esa;
4901 nam.nam$b_ess = NAM$C_MAXRSS;
4902
4903 status = SYS$PARSE (&fab);
4904 if ((status & 1) == 0)
4905 {
4906 errno = EVMSERR;
4907 vaxc$errno = status;
4908 return -1;
4909 }
4910 status = SYS$SEARCH (&fab);
4911 if ((status & 1) == 0)
4912 {
4913 errno = EVMSERR;
4914 vaxc$errno = status;
4915 return -1;
4916 }
4917
4918 fid[0] = nam.nam$w_fid[0];
4919 fid[1] = nam.nam$w_fid[1];
4920 fid[2] = nam.nam$w_fid[2];
4921
4922 fab.fab$l_fna = new;
4923 fab.fab$b_fns = strlen (new);
4924
4925 status = SYS$PARSE (&fab);
4926 if ((status & 1) == 0)
4927 {
4928 errno = EVMSERR;
4929 vaxc$errno = status;
4930 return -1;
4931 }
4932
4933 nam.nam$w_fid[0] = fid[0];
4934 nam.nam$w_fid[1] = fid[1];
4935 nam.nam$w_fid[2] = fid[2];
4936
4937 nam.nam$l_esa = nam.nam$l_name;
4938 nam.nam$b_esl = nam.nam$b_name + nam.nam$b_type + nam.nam$b_ver;
4939
4940 status = SYS$ENTER (&fab);
4941 if ((status & 1) == 0)
4942 {
4943 errno = EVMSERR;
4944 vaxc$errno = status;
4945 return -1;
4946 }
4947
4948 return 0;
4949 }
4950
4951 croak (badfunc)
4952 char *badfunc;
4953 {
4954 printf ("%s not yet implemented\r\n", badfunc);
4955 reset_sys_modes ();
4956 exit (1);
4957 }
4958
4959 long
4960 random ()
4961 {
4962 /* Arrange to return a range centered on zero. */
4963 return rand () - (1 << 30);
4964 }
4965
4966 srandom (seed)
4967 {
4968 srand (seed);
4969 }
4970 #endif /* VMS */
4971 \f
4972 #ifdef AIXHFT
4973
4974 /* Called from init_sys_modes. */
4975 hft_init ()
4976 {
4977 int junk;
4978
4979 /* If we're not on an HFT we shouldn't do any of this. We determine
4980 if we are on an HFT by trying to get an HFT error code. If this
4981 call fails, we're not on an HFT. */
4982 #ifdef IBMR2AIX
4983 if (ioctl (0, HFQERROR, &junk) < 0)
4984 return;
4985 #else /* not IBMR2AIX */
4986 if (ioctl (0, HFQEIO, 0) < 0)
4987 return;
4988 #endif /* not IBMR2AIX */
4989
4990 /* On AIX the default hft keyboard mapping uses backspace rather than delete
4991 as the rubout key's ASCII code. Here this is changed. The bug is that
4992 there's no way to determine the old mapping, so in reset_sys_modes
4993 we need to assume that the normal map had been present. Of course, this
4994 code also doesn't help if on a terminal emulator which doesn't understand
4995 HFT VTD's. */
4996 {
4997 struct hfbuf buf;
4998 struct hfkeymap keymap;
4999
5000 buf.hf_bufp = (char *)&keymap;
5001 buf.hf_buflen = sizeof (keymap);
5002 keymap.hf_nkeys = 2;
5003 keymap.hfkey[0].hf_kpos = 15;
5004 keymap.hfkey[0].hf_kstate = HFMAPCHAR | HFSHFNONE;
5005 #ifdef IBMR2AIX
5006 keymap.hfkey[0].hf_keyidh = '<';
5007 #else /* not IBMR2AIX */
5008 keymap.hfkey[0].hf_page = '<';
5009 #endif /* not IBMR2AIX */
5010 keymap.hfkey[0].hf_char = 127;
5011 keymap.hfkey[1].hf_kpos = 15;
5012 keymap.hfkey[1].hf_kstate = HFMAPCHAR | HFSHFSHFT;
5013 #ifdef IBMR2AIX
5014 keymap.hfkey[1].hf_keyidh = '<';
5015 #else /* not IBMR2AIX */
5016 keymap.hfkey[1].hf_page = '<';
5017 #endif /* not IBMR2AIX */
5018 keymap.hfkey[1].hf_char = 127;
5019 hftctl (0, HFSKBD, &buf);
5020 }
5021 /* The HFT system on AIX doesn't optimize for scrolling, so it's really ugly
5022 at times. */
5023 line_ins_del_ok = char_ins_del_ok = 0;
5024 }
5025
5026 /* Reset the rubout key to backspace. */
5027
5028 hft_reset ()
5029 {
5030 struct hfbuf buf;
5031 struct hfkeymap keymap;
5032 int junk;
5033
5034 #ifdef IBMR2AIX
5035 if (ioctl (0, HFQERROR, &junk) < 0)
5036 return;
5037 #else /* not IBMR2AIX */
5038 if (ioctl (0, HFQEIO, 0) < 0)
5039 return;
5040 #endif /* not IBMR2AIX */
5041
5042 buf.hf_bufp = (char *)&keymap;
5043 buf.hf_buflen = sizeof (keymap);
5044 keymap.hf_nkeys = 2;
5045 keymap.hfkey[0].hf_kpos = 15;
5046 keymap.hfkey[0].hf_kstate = HFMAPCHAR | HFSHFNONE;
5047 #ifdef IBMR2AIX
5048 keymap.hfkey[0].hf_keyidh = '<';
5049 #else /* not IBMR2AIX */
5050 keymap.hfkey[0].hf_page = '<';
5051 #endif /* not IBMR2AIX */
5052 keymap.hfkey[0].hf_char = 8;
5053 keymap.hfkey[1].hf_kpos = 15;
5054 keymap.hfkey[1].hf_kstate = HFMAPCHAR | HFSHFSHFT;
5055 #ifdef IBMR2AIX
5056 keymap.hfkey[1].hf_keyidh = '<';
5057 #else /* not IBMR2AIX */
5058 keymap.hfkey[1].hf_page = '<';
5059 #endif /* not IBMR2AIX */
5060 keymap.hfkey[1].hf_char = 8;
5061 hftctl (0, HFSKBD, &buf);
5062 }
5063
5064 #endif /* AIXHFT */
5065
5066 #ifdef USE_DL_STUBS
5067
5068 /* These are included on Sunos 4.1 when we do not use shared libraries.
5069 X11 libraries may refer to these functions but (we hope) do not
5070 actually call them. */
5071
5072 void *
5073 dlopen ()
5074 {
5075 return 0;
5076 }
5077
5078 void *
5079 dlsym ()
5080 {
5081 return 0;
5082 }
5083
5084 int
5085 dlclose ()
5086 {
5087 return -1;
5088 }
5089
5090 #endif /* USE_DL_STUBS */
5091 \f
5092 #ifndef BSTRING
5093
5094 #ifndef bzero
5095
5096 void
5097 bzero (b, length)
5098 register char *b;
5099 register int length;
5100 {
5101 #ifdef VMS
5102 short zero = 0;
5103 long max_str = 65535;
5104
5105 while (length > max_str) {
5106 (void) LIB$MOVC5 (&zero, &zero, &zero, &max_str, b);
5107 length -= max_str;
5108 b += max_str;
5109 }
5110 max_str = length;
5111 (void) LIB$MOVC5 (&zero, &zero, &zero, &max_str, b);
5112 #else
5113 while (length-- > 0)
5114 *b++ = 0;
5115 #endif /* not VMS */
5116 }
5117
5118 #endif /* no bzero */
5119 #endif /* BSTRING */
5120
5121 #if (!defined (BSTRING) && !defined (bcopy)) || defined (NEED_BCOPY)
5122 #undef bcopy
5123
5124 /* Saying `void' requires a declaration, above, where bcopy is used
5125 and that declaration causes pain for systems where bcopy is a macro. */
5126 bcopy (b1, b2, length)
5127 register char *b1;
5128 register char *b2;
5129 register int length;
5130 {
5131 #ifdef VMS
5132 long max_str = 65535;
5133
5134 while (length > max_str) {
5135 (void) LIB$MOVC3 (&max_str, b1, b2);
5136 length -= max_str;
5137 b1 += max_str;
5138 b2 += max_str;
5139 }
5140 max_str = length;
5141 (void) LIB$MOVC3 (&length, b1, b2);
5142 #else
5143 while (length-- > 0)
5144 *b2++ = *b1++;
5145 #endif /* not VMS */
5146 }
5147 #endif /* (defined (BSTRING) && !defined (bcopy)) || defined (NEED_BCOPY) */
5148
5149 #ifndef BSTRING
5150 #ifndef bcmp
5151 int
5152 bcmp (b1, b2, length) /* This could be a macro! */
5153 register char *b1;
5154 register char *b2;
5155 register int length;
5156 {
5157 #ifdef VMS
5158 struct dsc$descriptor_s src1 = {length, DSC$K_DTYPE_T, DSC$K_CLASS_S, b1};
5159 struct dsc$descriptor_s src2 = {length, DSC$K_DTYPE_T, DSC$K_CLASS_S, b2};
5160
5161 return STR$COMPARE (&src1, &src2);
5162 #else
5163 while (length-- > 0)
5164 if (*b1++ != *b2++)
5165 return 1;
5166
5167 return 0;
5168 #endif /* not VMS */
5169 }
5170 #endif /* no bcmp */
5171 #endif /* not BSTRING */
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