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1/* Interfaces to system-dependent kernel and library entries.
2 Copyright (C) 1985, 86,87,88,93,94,95, 1999, 2000, 2001
3 Free Software Foundation, Inc.
4
5This file is part of GNU Emacs.
6
7GNU Emacs is free software; you can redistribute it and/or modify
8it under the terms of the GNU General Public License as published by
9the Free Software Foundation; either version 2, or (at your option)
10any later version.
11
12GNU Emacs is distributed in the hope that it will be useful,
13but WITHOUT ANY WARRANTY; without even the implied warranty of
14MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15GNU General Public License for more details.
16
17You should have received a copy of the GNU General Public License
18along with GNU Emacs; see the file COPYING. If not, write to
19the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20Boston, MA 02111-1307, USA. */
21
22#ifdef HAVE_CONFIG_H
23#include <config.h>
24#endif
25
26#include <signal.h>
27#include <setjmp.h>
28#ifdef HAVE_UNISTD_H
29#include <unistd.h>
30#endif
31#include "lisp.h"
32/* Including stdlib.h isn't necessarily enough to get srandom
33 declared, e.g. without __USE_XOPEN_EXTENDED with glibc 2. */
34#ifdef HAVE_RANDOM
35#if 0 /* It turns out that defining _OSF_SOURCE in osf5-0.h gets
36 random prototyped as returning `int'. It looks to me as
37 though the best way to DTRT is to prefer the rand48 functions
38 (per libc.info). -- fx */
39extern long int random P_ ((void));
40#endif
41#if 0 /* Don't prototype srandom; it takes an unsigned argument on
42 some systems, and an unsigned long on others, like FreeBSD
43 4.1. */
44extern void srandom P_ ((unsigned int));
45#endif
46#endif
47
48#include "blockinput.h"
49#undef NULL
50
51#ifdef MAC_OS8
52/* It is essential to include stdlib.h so that this file picks up
53 the correct definitions of rand, srand, and RAND_MAX.
54 Otherwise random numbers will not work correctly. */
55#include <stdlib.h>
56
57#ifndef subprocesses
58/* Nonzero means delete a process right away if it exits (process.c). */
59static int delete_exited_processes;
60#endif
61#endif /* MAC_OS8 */
62
63#ifdef WINDOWSNT
64#define read sys_read
65#define write sys_write
66#include <windows.h>
67#ifndef NULL
68#define NULL 0
69#endif
70#endif /* not WINDOWSNT */
71
72/* Does anyone other than VMS need this? */
73#ifndef fwrite
74#define sys_fwrite fwrite
75#else
76#undef fwrite
77#endif
78
79#include <stdio.h>
80#include <sys/types.h>
81#include <sys/stat.h>
82#include <errno.h>
83
84/* Get _POSIX_VDISABLE, if it is available. */
85#ifdef HAVE_UNISTD_H
86#include <unistd.h>
87#endif
88
89#ifdef HAVE_STDLIB_H
90#include <stdlib.h>
91#endif
92
93#ifdef HAVE_SETPGID
94#if !defined (USG) || defined (BSD_PGRPS)
95#undef setpgrp
96#define setpgrp setpgid
97#endif
98#endif
99
100/* Get SI_SRPC_DOMAIN, if it is available. */
101#ifdef HAVE_SYS_SYSTEMINFO_H
102#include <sys/systeminfo.h>
103#endif
104
105#ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida, MW Aug 1993 */
106#include <dos.h>
107#include "dosfns.h"
108#include "msdos.h"
109#include <sys/param.h>
110
111#if __DJGPP__ > 1
112extern int etext;
113extern unsigned start __asm__ ("start");
114#endif
115#endif
116
117#ifndef USE_CRT_DLL
118#ifndef errno
119extern int errno;
120#endif
121#endif
122
123#ifdef VMS
124#include <rms.h>
125#include <ttdef.h>
126#include <tt2def.h>
127#include <iodef.h>
128#include <ssdef.h>
129#include <descrip.h>
130#include <fibdef.h>
131#include <atrdef.h>
132#include <ctype.h>
133#include <string.h>
134#ifdef __GNUC__
135#include <sys/file.h>
136#else
137#include <file.h>
138#endif
139#undef F_SETFL
140#ifndef RAB$C_BID
141#include <rab.h>
142#endif
143#define MAXIOSIZE (32 * PAGESIZE) /* Don't I/O more than 32 blocks at a time */
144#endif /* VMS */
145
146#ifndef VMS
147#include <sys/file.h>
148#endif /* not VMS */
149
150#ifndef BSD4_1
151#ifdef BSD_SYSTEM /* avoid writing defined (BSD_SYSTEM) || defined (USG)
152 because the vms compiler doesn't grok `defined' */
153#include <fcntl.h>
154#endif
155#ifdef USG
156#ifndef USG5
157#include <fcntl.h>
158#endif
159#endif
160#endif /* not 4.1 bsd */
161
162#ifndef MSDOS
163#include <sys/ioctl.h>
164#endif
165
166#include "systty.h"
167#include "syswait.h"
168
169#ifdef BROKEN_TIOCGWINSZ
170#undef TIOCGWINSZ
171#undef TIOCSWINSZ
172#endif
173
174#if defined (USG) || defined (DGUX)
175#include <sys/utsname.h>
176#ifndef MEMORY_IN_STRING_H
177#include <memory.h>
178#endif
179#if defined (TIOCGWINSZ) || defined (ISC4_0)
180#ifdef NEED_SIOCTL
181#include <sys/sioctl.h>
182#endif
183#ifdef NEED_PTEM_H
184#include <sys/stream.h>
185#include <sys/ptem.h>
186#endif
187#endif /* TIOCGWINSZ or ISC4_0 */
188#endif /* USG or DGUX */
189
190extern int quit_char;
191
192#include "keyboard.h"
193#include "frame.h"
194#include "window.h"
195#include "termhooks.h"
196#include "termchar.h"
197#include "termopts.h"
198#include "dispextern.h"
199#include "process.h"
200
201#ifdef WINDOWSNT
202#include <direct.h>
203/* In process.h which conflicts with the local copy. */
204#define _P_WAIT 0
205int _CRTAPI1 _spawnlp (int, const char *, const char *, ...);
206int _CRTAPI1 _getpid (void);
207#endif
208
209#ifdef NONSYSTEM_DIR_LIBRARY
210#include "ndir.h"
211#endif /* NONSYSTEM_DIR_LIBRARY */
212
213#include "syssignal.h"
214#include "systime.h"
215#ifdef HAVE_UTIME_H
216#include <utime.h>
217#endif
218
219#ifndef HAVE_UTIMES
220#ifndef HAVE_STRUCT_UTIMBUF
221/* We want to use utime rather than utimes, but we couldn't find the
222 structure declaration. We'll use the traditional one. */
223struct utimbuf {
224 long actime;
225 long modtime;
226};
227#endif
228#endif
229
230/* LPASS8 is new in 4.3, and makes cbreak mode provide all 8 bits. */
231#ifndef LPASS8
232#define LPASS8 0
233#endif
234
235#ifdef BSD4_1
236#define LNOFLSH 0100000
237#endif
238
239static int baud_convert[] =
240#ifdef BAUD_CONVERT
241 BAUD_CONVERT;
242#else
243 {
244 0, 50, 75, 110, 135, 150, 200, 300, 600, 1200,
245 1800, 2400, 4800, 9600, 19200, 38400
246 };
247#endif
248
249#ifdef HAVE_SPEED_T
250#include <termios.h>
251#else
252#if defined (HAVE_LIBNCURSES) && ! defined (NCURSES_OSPEED_T)
253#else
254#if defined (HAVE_TERMIOS_H) && defined (GNU_LINUX)
255#include <termios.h>
256#endif
257#endif
258#endif
259
260int emacs_ospeed;
261
262/* The file descriptor for Emacs's input terminal.
263 Under Unix, this is normally zero except when using X;
264 under VMS, we place the input channel number here. */
265int input_fd;
266
267void croak P_ ((char *));
268
269#ifdef AIXHFT
270void hft_init ();
271void hft_reset ();
272#endif
273
274/* Temporary used by `sigblock' when defined in terms of signprocmask. */
275
276SIGMASKTYPE sigprocmask_set;
277
278\f
279/* Specify a different file descriptor for further input operations. */
280
281void
282change_input_fd (fd)
283 int fd;
284{
285 input_fd = fd;
286}
287
288/* Discard pending input on descriptor input_fd. */
289
290void
291discard_tty_input ()
292{
293#ifndef WINDOWSNT
294 struct emacs_tty buf;
295
296 if (noninteractive)
297 return;
298
299 /* Discarding input is not safe when the input could contain
300 replies from the X server. So don't do it. */
301 if (read_socket_hook)
302 return;
303
304#ifdef VMS
305 end_kbd_input ();
306 SYS$QIOW (0, input_fd, IO$_READVBLK|IO$M_PURGE, input_iosb, 0, 0,
307 &buf.main, 0, 0, terminator_mask, 0, 0);
308 queue_kbd_input ();
309#else /* not VMS */
310#ifdef APOLLO
311 {
312 int zero = 0;
313 ioctl (input_fd, TIOCFLUSH, &zero);
314 }
315#else /* not Apollo */
316#ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */
317 while (dos_keyread () != -1)
318 ;
319#else /* not MSDOS */
320 EMACS_GET_TTY (input_fd, &buf);
321 EMACS_SET_TTY (input_fd, &buf, 0);
322#endif /* not MSDOS */
323#endif /* not Apollo */
324#endif /* not VMS */
325#endif /* not WINDOWSNT */
326}
327
328#ifdef SIGTSTP
329
330/* Arrange for character C to be read as the next input from
331 the terminal. */
332
333void
334#ifdef PROTOTYPES
335stuff_char (char c)
336#else
337stuff_char (c)
338 char c;
339#endif
340{
341 if (read_socket_hook)
342 return;
343
344/* Should perhaps error if in batch mode */
345#ifdef TIOCSTI
346 ioctl (input_fd, TIOCSTI, &c);
347#else /* no TIOCSTI */
348 error ("Cannot stuff terminal input characters in this version of Unix");
349#endif /* no TIOCSTI */
350}
351
352#endif /* SIGTSTP */
353\f
354void
355init_baud_rate ()
356{
357 if (noninteractive)
358 emacs_ospeed = 0;
359 else
360 {
361#ifdef INIT_BAUD_RATE
362 INIT_BAUD_RATE ();
363#else
364#ifdef DOS_NT
365 emacs_ospeed = 15;
366#else /* not DOS_NT */
367#ifdef VMS
368 struct sensemode sg;
369
370 SYS$QIOW (0, input_fd, IO$_SENSEMODE, &sg, 0, 0,
371 &sg.class, 12, 0, 0, 0, 0 );
372 emacs_ospeed = sg.xmit_baud;
373#else /* not VMS */
374#ifdef HAVE_TERMIOS
375 struct termios sg;
376
377 sg.c_cflag = B9600;
378 tcgetattr (input_fd, &sg);
379 emacs_ospeed = cfgetospeed (&sg);
380#if defined (USE_GETOBAUD) && defined (getobaud)
381 /* m88k-motorola-sysv3 needs this (ghazi@noc.rutgers.edu) 9/1/94. */
382 if (emacs_ospeed == 0)
383 emacs_ospeed = getobaud (sg.c_cflag);
384#endif
385#else /* neither VMS nor TERMIOS */
386#ifdef HAVE_TERMIO
387 struct termio sg;
388
389 sg.c_cflag = B9600;
390#ifdef HAVE_TCATTR
391 tcgetattr (input_fd, &sg);
392#else
393 ioctl (input_fd, TCGETA, &sg);
394#endif
395 emacs_ospeed = sg.c_cflag & CBAUD;
396#else /* neither VMS nor TERMIOS nor TERMIO */
397 struct sgttyb sg;
398
399 sg.sg_ospeed = B9600;
400 if (ioctl (input_fd, TIOCGETP, &sg) < 0)
401 abort ();
402 emacs_ospeed = sg.sg_ospeed;
403#endif /* not HAVE_TERMIO */
404#endif /* not HAVE_TERMIOS */
405#endif /* not VMS */
406#endif /* not DOS_NT */
407#endif /* not INIT_BAUD_RATE */
408 }
409
410 baud_rate = (emacs_ospeed < sizeof baud_convert / sizeof baud_convert[0]
411 ? baud_convert[emacs_ospeed] : 9600);
412 if (baud_rate == 0)
413 baud_rate = 1200;
414}
415
416/*ARGSUSED*/
417void
418set_exclusive_use (fd)
419 int fd;
420{
421#ifdef FIOCLEX
422 ioctl (fd, FIOCLEX, 0);
423#endif
424 /* Ok to do nothing if this feature does not exist */
425}
426\f
427#ifndef subprocesses
428
429wait_without_blocking ()
430{
431#ifdef BSD_SYSTEM
432 wait3 (0, WNOHANG | WUNTRACED, 0);
433#else
434 croak ("wait_without_blocking");
435#endif
436 synch_process_alive = 0;
437}
438
439#endif /* not subprocesses */
440
441int wait_debugging; /* Set nonzero to make following function work under dbx
442 (at least for bsd). */
443
444SIGTYPE
445wait_for_termination_signal ()
446{}
447
448/* Wait for subprocess with process id `pid' to terminate and
449 make sure it will get eliminated (not remain forever as a zombie) */
450
451void
452wait_for_termination (pid)
453 int pid;
454{
455 while (1)
456 {
457#ifdef subprocesses
458#ifdef VMS
459 int status;
460
461 status = SYS$FORCEX (&pid, 0, 0);
462 break;
463#else /* not VMS */
464#if defined (BSD_SYSTEM) || (defined (HPUX) && !defined (HPUX_5))
465 /* Note that kill returns -1 even if the process is just a zombie now.
466 But inevitably a SIGCHLD interrupt should be generated
467 and child_sig will do wait3 and make the process go away. */
468 /* There is some indication that there is a bug involved with
469 termination of subprocesses, perhaps involving a kernel bug too,
470 but no idea what it is. Just as a hunch we signal SIGCHLD to see
471 if that causes the problem to go away or get worse. */
472 sigsetmask (sigmask (SIGCHLD));
473 if (0 > kill (pid, 0))
474 {
475 sigsetmask (SIGEMPTYMASK);
476 kill (getpid (), SIGCHLD);
477 break;
478 }
479 if (wait_debugging)
480 sleep (1);
481 else
482 sigpause (SIGEMPTYMASK);
483#else /* not BSD_SYSTEM, and not HPUX version >= 6 */
484#if defined (UNIPLUS)
485 if (0 > kill (pid, 0))
486 break;
487 wait (0);
488#else /* neither BSD_SYSTEM nor UNIPLUS: random sysV */
489#ifdef POSIX_SIGNALS /* would this work for GNU/Linux as well? */
490 sigblock (sigmask (SIGCHLD));
491 errno = 0;
492 if (kill (pid, 0) == -1 && errno == ESRCH)
493 {
494 sigunblock (sigmask (SIGCHLD));
495 break;
496 }
497
498 sigsuspend (&empty_mask);
499#else /* not POSIX_SIGNALS */
500#ifdef HAVE_SYSV_SIGPAUSE
501 sighold (SIGCHLD);
502 if (0 > kill (pid, 0))
503 {
504 sigrelse (SIGCHLD);
505 break;
506 }
507 sigpause (SIGCHLD);
508#else /* not HAVE_SYSV_SIGPAUSE */
509#ifdef WINDOWSNT
510 wait (0);
511 break;
512#else /* not WINDOWSNT */
513 if (0 > kill (pid, 0))
514 break;
515 /* Using sleep instead of pause avoids timing error.
516 If the inferior dies just before the sleep,
517 we lose just one second. */
518 sleep (1);
519#endif /* not WINDOWSNT */
520#endif /* not HAVE_SYSV_SIGPAUSE */
521#endif /* not POSIX_SIGNALS */
522#endif /* not UNIPLUS */
523#endif /* not BSD_SYSTEM, and not HPUX version >= 6 */
524#endif /* not VMS */
525#else /* not subprocesses */
526#if __DJGPP__ > 1
527 break;
528#else /* not __DJGPP__ > 1 */
529#ifndef BSD4_1
530 if (kill (pid, 0) < 0)
531 break;
532 wait (0);
533#else /* BSD4_1 */
534 int status;
535 status = wait (0);
536 if (status == pid || status == -1)
537 break;
538#endif /* BSD4_1 */
539#endif /* not __DJGPP__ > 1*/
540#endif /* not subprocesses */
541 }
542}
543
544#ifdef subprocesses
545
546/*
547 * flush any pending output
548 * (may flush input as well; it does not matter the way we use it)
549 */
550
551void
552flush_pending_output (channel)
553 int channel;
554{
555#ifdef HAVE_TERMIOS
556 /* If we try this, we get hit with SIGTTIN, because
557 the child's tty belongs to the child's pgrp. */
558#else
559#ifdef TCFLSH
560 ioctl (channel, TCFLSH, 1);
561#else
562#ifdef TIOCFLUSH
563 int zero = 0;
564 /* 3rd arg should be ignored
565 but some 4.2 kernels actually want the address of an int
566 and nonzero means something different. */
567 ioctl (channel, TIOCFLUSH, &zero);
568#endif
569#endif
570#endif
571}
572\f
573#ifndef VMS
574/* Set up the terminal at the other end of a pseudo-terminal that
575 we will be controlling an inferior through.
576 It should not echo or do line-editing, since that is done
577 in Emacs. No padding needed for insertion into an Emacs buffer. */
578
579void
580child_setup_tty (out)
581 int out;
582{
583#ifndef DOS_NT
584 struct emacs_tty s;
585
586 EMACS_GET_TTY (out, &s);
587
588#if defined (HAVE_TERMIO) || defined (HAVE_TERMIOS)
589 s.main.c_oflag |= OPOST; /* Enable output postprocessing */
590 s.main.c_oflag &= ~ONLCR; /* Disable map of NL to CR-NL on output */
591#ifdef NLDLY
592 s.main.c_oflag &= ~(NLDLY|CRDLY|TABDLY|BSDLY|VTDLY|FFDLY);
593 /* No output delays */
594#endif
595 s.main.c_lflag &= ~ECHO; /* Disable echo */
596 s.main.c_lflag |= ISIG; /* Enable signals */
597#if 0 /* This causes bugs in (for instance) telnet to certain sites. */
598 s.main.c_iflag &= ~ICRNL; /* Disable map of CR to NL on input */
599#ifdef INLCR /* Just being cautious, since I can't check how
600 widespread INLCR is--rms. */
601 s.main.c_iflag &= ~INLCR; /* Disable map of NL to CR on input */
602#endif
603#endif
604#ifdef IUCLC
605 s.main.c_iflag &= ~IUCLC; /* Disable downcasing on input. */
606#endif
607#ifdef ISTRIP
608 s.main.c_iflag &= ~ISTRIP; /* don't strip 8th bit on input */
609#endif
610#ifdef OLCUC
611 s.main.c_oflag &= ~OLCUC; /* Disable upcasing on output. */
612#endif
613 s.main.c_oflag &= ~TAB3; /* Disable tab expansion */
614 s.main.c_cflag = (s.main.c_cflag & ~CSIZE) | CS8; /* Don't strip 8th bit */
615#if 0
616 /* Said to be unnecessary: */
617 s.main.c_cc[VMIN] = 1; /* minimum number of characters to accept */
618 s.main.c_cc[VTIME] = 0; /* wait forever for at least 1 character */
619#endif
620
621 s.main.c_lflag |= ICANON; /* Enable erase/kill and eof processing */
622 s.main.c_cc[VEOF] = 04; /* insure that EOF is Control-D */
623 s.main.c_cc[VERASE] = CDISABLE; /* disable erase processing */
624 s.main.c_cc[VKILL] = CDISABLE; /* disable kill processing */
625
626#ifdef HPUX
627 s.main.c_cflag = (s.main.c_cflag & ~CBAUD) | B9600; /* baud rate sanity */
628#endif /* HPUX */
629
630#ifdef AIX
631/* AIX enhanced edit loses NULs, so disable it */
632#ifndef IBMR2AIX
633 s.main.c_line = 0;
634 s.main.c_iflag &= ~ASCEDIT;
635#endif
636 /* Also, PTY overloads NUL and BREAK.
637 don't ignore break, but don't signal either, so it looks like NUL. */
638 s.main.c_iflag &= ~IGNBRK;
639 s.main.c_iflag &= ~BRKINT;
640 /* QUIT and INTR work better as signals, so disable character forms */
641 s.main.c_cc[VINTR] = 0377;
642#ifdef SIGNALS_VIA_CHARACTERS
643 /* the QUIT and INTR character are used in process_send_signal
644 so set them here to something useful. */
645 if (s.main.c_cc[VQUIT] == 0377)
646 s.main.c_cc[VQUIT] = '\\'&037; /* Control-\ */
647 if (s.main.c_cc[VINTR] == 0377)
648 s.main.c_cc[VINTR] = 'C'&037; /* Control-C */
649#else /* no TIOCGPGRP or no TIOCGLTC or no TIOCGETC */
650 /* QUIT and INTR work better as signals, so disable character forms */
651 s.main.c_cc[VQUIT] = 0377;
652 s.main.c_cc[VINTR] = 0377;
653 s.main.c_lflag &= ~ISIG;
654#endif /* no TIOCGPGRP or no TIOCGLTC or no TIOCGETC */
655 s.main.c_cc[VEOL] = 0377;
656 s.main.c_cflag = (s.main.c_cflag & ~CBAUD) | B9600; /* baud rate sanity */
657#endif /* AIX */
658
659#else /* not HAVE_TERMIO */
660
661 s.main.sg_flags &= ~(ECHO | CRMOD | ANYP | ALLDELAY | RAW | LCASE
662 | CBREAK | TANDEM);
663 s.main.sg_flags |= LPASS8;
664 s.main.sg_erase = 0377;
665 s.main.sg_kill = 0377;
666 s.lmode = LLITOUT | s.lmode; /* Don't strip 8th bit */
667
668#endif /* not HAVE_TERMIO */
669
670 EMACS_SET_TTY (out, &s, 0);
671
672#ifdef BSD4_1
673 if (interrupt_input)
674 reset_sigio ();
675#endif /* BSD4_1 */
676#ifdef RTU
677 {
678 int zero = 0;
679 ioctl (out, FIOASYNC, &zero);
680 }
681#endif /* RTU */
682#endif /* not DOS_NT */
683}
684#endif /* not VMS */
685
686#endif /* subprocesses */
687\f
688/* Record a signal code and the handler for it. */
689struct save_signal
690{
691 int code;
692 SIGTYPE (*handler) P_ ((int));
693};
694
695static void save_signal_handlers P_ ((struct save_signal *));
696static void restore_signal_handlers P_ ((struct save_signal *));
697
698/* Suspend the Emacs process; give terminal to its superior. */
699
700void
701sys_suspend ()
702{
703#ifdef VMS
704 /* "Foster" parentage allows emacs to return to a subprocess that attached
705 to the current emacs as a cheaper than starting a whole new process. This
706 is set up by KEPTEDITOR.COM. */
707 unsigned long parent_id, foster_parent_id;
708 char *fpid_string;
709
710 fpid_string = getenv ("EMACS_PARENT_PID");
711 if (fpid_string != NULL)
712 {
713 sscanf (fpid_string, "%x", &foster_parent_id);
714 if (foster_parent_id != 0)
715 parent_id = foster_parent_id;
716 else
717 parent_id = getppid ();
718 }
719 else
720 parent_id = getppid ();
721
722 xfree (fpid_string); /* On VMS, this was malloc'd */
723
724 if (parent_id && parent_id != 0xffffffff)
725 {
726 SIGTYPE (*oldsig)() = (int) signal (SIGINT, SIG_IGN);
727 int status = LIB$ATTACH (&parent_id) & 1;
728 signal (SIGINT, oldsig);
729 return status;
730 }
731 else
732 {
733 struct {
734 int l;
735 char *a;
736 } d_prompt;
737 d_prompt.l = sizeof ("Emacs: "); /* Our special prompt */
738 d_prompt.a = "Emacs: "; /* Just a reminder */
739 LIB$SPAWN (0, 0, 0, 0, 0, 0, 0, 0, 0, 0, &d_prompt, 0);
740 return 1;
741 }
742 return -1;
743#else
744#if defined (SIGTSTP) && !defined (MSDOS)
745
746 {
747 int pgrp = EMACS_GETPGRP (0);
748 EMACS_KILLPG (pgrp, SIGTSTP);
749 }
750
751#else /* No SIGTSTP */
752#ifdef USG_JOBCTRL /* If you don't know what this is don't mess with it */
753 ptrace (0, 0, 0, 0); /* set for ptrace - caught by csh */
754 kill (getpid (), SIGQUIT);
755
756#else /* No SIGTSTP or USG_JOBCTRL */
757
758/* On a system where suspending is not implemented,
759 instead fork a subshell and let it talk directly to the terminal
760 while we wait. */
761 sys_subshell ();
762
763#endif /* no USG_JOBCTRL */
764#endif /* no SIGTSTP */
765#endif /* not VMS */
766}
767
768/* Fork a subshell. */
769
770#ifndef MAC_OS8
771void
772sys_subshell ()
773{
774#ifndef VMS
775#ifdef DOS_NT /* Demacs 1.1.2 91/10/20 Manabu Higashida */
776 int st;
777 char oldwd[MAXPATHLEN+1]; /* Fixed length is safe on MSDOS. */
778#endif
779 int pid;
780 struct save_signal saved_handlers[5];
781 Lisp_Object dir;
782 unsigned char *str = 0;
783 int len;
784
785 saved_handlers[0].code = SIGINT;
786 saved_handlers[1].code = SIGQUIT;
787 saved_handlers[2].code = SIGTERM;
788#ifdef SIGIO
789 saved_handlers[3].code = SIGIO;
790 saved_handlers[4].code = 0;
791#else
792 saved_handlers[3].code = 0;
793#endif
794
795 /* Mentioning current_buffer->buffer would mean including buffer.h,
796 which somehow wedges the hp compiler. So instead... */
797
798 dir = intern ("default-directory");
799 if (NILP (Fboundp (dir)))
800 goto xyzzy;
801 dir = Fsymbol_value (dir);
802 if (!STRINGP (dir))
803 goto xyzzy;
804
805 dir = expand_and_dir_to_file (Funhandled_file_name_directory (dir), Qnil);
806 str = (unsigned char *) alloca (SCHARS (dir) + 2);
807 len = SCHARS (dir);
808 bcopy (SDATA (dir), str, len);
809 if (str[len - 1] != '/') str[len++] = '/';
810 str[len] = 0;
811 xyzzy:
812
813#ifdef DOS_NT
814 pid = 0;
815#if __DJGPP__ > 1
816 save_signal_handlers (saved_handlers);
817 synch_process_alive = 1;
818#endif /* __DJGPP__ > 1 */
819#else
820 pid = vfork ();
821 if (pid == -1)
822 error ("Can't spawn subshell");
823#endif
824
825 if (pid == 0)
826 {
827 char *sh = 0;
828
829#ifdef DOS_NT /* MW, Aug 1993 */
830 getwd (oldwd);
831 if (sh == 0)
832 sh = (char *) egetenv ("SUSPEND"); /* KFS, 1994-12-14 */
833#endif
834 if (sh == 0)
835 sh = (char *) egetenv ("SHELL");
836 if (sh == 0)
837 sh = "sh";
838
839 /* Use our buffer's default directory for the subshell. */
840 if (str)
841 chdir ((char *) str);
842
843#ifdef subprocesses
844 close_process_descs (); /* Close Emacs's pipes/ptys */
845#endif
846
847#ifdef SET_EMACS_PRIORITY
848 {
849 extern EMACS_INT emacs_priority;
850
851 if (emacs_priority < 0)
852 nice (-emacs_priority);
853 }
854#endif
855
856#ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */
857 {
858 char *epwd = getenv ("PWD");
859 char old_pwd[MAXPATHLEN+1+4];
860
861 /* If PWD is set, pass it with corrected value. */
862 if (epwd)
863 {
864 strcpy (old_pwd, epwd);
865 if (str[len - 1] == '/')
866 str[len - 1] = '\0';
867 setenv ("PWD", str, 1);
868 }
869 st = system (sh);
870 chdir (oldwd);
871 if (epwd)
872 putenv (old_pwd); /* restore previous value */
873 }
874#if 0 /* This is also reported if last command executed in subshell failed, KFS */
875 if (st)
876 report_file_error ("Can't execute subshell", Fcons (build_string (sh), Qnil));
877#endif
878#else /* not MSDOS */
879#ifdef WINDOWSNT
880 /* Waits for process completion */
881 pid = _spawnlp (_P_WAIT, sh, sh, NULL);
882 chdir (oldwd);
883 if (pid == -1)
884 write (1, "Can't execute subshell", 22);
885#else /* not WINDOWSNT */
886 execlp (sh, sh, 0);
887 write (1, "Can't execute subshell", 22);
888 _exit (1);
889#endif /* not WINDOWSNT */
890#endif /* not MSDOS */
891 }
892
893 /* Do this now if we did not do it before. */
894#if !defined (MSDOS) || __DJGPP__ == 1
895 save_signal_handlers (saved_handlers);
896 synch_process_alive = 1;
897#endif
898
899#ifndef DOS_NT
900 wait_for_termination (pid);
901#endif
902 restore_signal_handlers (saved_handlers);
903 synch_process_alive = 0;
904#endif /* !VMS */
905}
906#endif /* !MAC_OS8 */
907
908static void
909save_signal_handlers (saved_handlers)
910 struct save_signal *saved_handlers;
911{
912 while (saved_handlers->code)
913 {
914 saved_handlers->handler
915 = (SIGTYPE (*) P_ ((int))) signal (saved_handlers->code, SIG_IGN);
916 saved_handlers++;
917 }
918}
919
920static void
921restore_signal_handlers (saved_handlers)
922 struct save_signal *saved_handlers;
923{
924 while (saved_handlers->code)
925 {
926 signal (saved_handlers->code, saved_handlers->handler);
927 saved_handlers++;
928 }
929}
930\f
931#ifdef F_SETFL
932
933int old_fcntl_flags;
934
935void
936init_sigio (fd)
937 int fd;
938{
939#ifdef FASYNC
940 old_fcntl_flags = fcntl (fd, F_GETFL, 0) & ~FASYNC;
941 fcntl (fd, F_SETFL, old_fcntl_flags | FASYNC);
942#endif
943 interrupts_deferred = 0;
944}
945
946void
947reset_sigio ()
948{
949 unrequest_sigio ();
950}
951
952#ifdef FASYNC /* F_SETFL does not imply existence of FASYNC */
953
954void
955request_sigio ()
956{
957 if (read_socket_hook)
958 return;
959
960#ifdef SIGWINCH
961 sigunblock (sigmask (SIGWINCH));
962#endif
963 fcntl (input_fd, F_SETFL, old_fcntl_flags | FASYNC);
964
965 interrupts_deferred = 0;
966}
967
968void
969unrequest_sigio ()
970{
971 if (read_socket_hook)
972 return;
973
974#ifdef SIGWINCH
975 sigblock (sigmask (SIGWINCH));
976#endif
977 fcntl (input_fd, F_SETFL, old_fcntl_flags);
978 interrupts_deferred = 1;
979}
980
981#else /* no FASYNC */
982#ifdef STRIDE /* Stride doesn't have FASYNC - use FIOASYNC */
983
984void
985request_sigio ()
986{
987 int on = 1;
988
989 if (read_socket_hook)
990 return;
991
992 ioctl (input_fd, FIOASYNC, &on);
993 interrupts_deferred = 0;
994}
995
996void
997unrequest_sigio ()
998{
999 int off = 0;
1000
1001 if (read_socket_hook)
1002 return;
1003
1004 ioctl (input_fd, FIOASYNC, &off);
1005 interrupts_deferred = 1;
1006}
1007
1008#else /* not FASYNC, not STRIDE */
1009
1010#ifdef _CX_UX
1011
1012#include <termios.h>
1013
1014void
1015request_sigio ()
1016{
1017 int on = 1;
1018 sigset_t st;
1019
1020 if (read_socket_hook)
1021 return;
1022
1023 sigemptyset (&st);
1024 sigaddset (&st, SIGIO);
1025 ioctl (input_fd, FIOASYNC, &on);
1026 interrupts_deferred = 0;
1027 sigprocmask (SIG_UNBLOCK, &st, (sigset_t *)0);
1028}
1029
1030void
1031unrequest_sigio ()
1032{
1033 int off = 0;
1034
1035 if (read_socket_hook)
1036 return;
1037
1038 ioctl (input_fd, FIOASYNC, &off);
1039 interrupts_deferred = 1;
1040}
1041
1042#else /* ! _CX_UX */
1043#ifndef MSDOS
1044
1045void
1046request_sigio ()
1047{
1048 if (read_socket_hook)
1049 return;
1050
1051 croak ("request_sigio");
1052}
1053
1054void
1055unrequest_sigio ()
1056{
1057 if (read_socket_hook)
1058 return;
1059
1060 croak ("unrequest_sigio");
1061}
1062
1063#endif /* MSDOS */
1064#endif /* _CX_UX */
1065#endif /* STRIDE */
1066#endif /* FASYNC */
1067#endif /* F_SETFL */
1068\f
1069/* Saving and restoring the process group of Emacs's terminal. */
1070
1071#ifdef BSD_PGRPS
1072
1073/* The process group of which Emacs was a member when it initially
1074 started.
1075
1076 If Emacs was in its own process group (i.e. inherited_pgroup ==
1077 getpid ()), then we know we're running under a shell with job
1078 control (Emacs would never be run as part of a pipeline).
1079 Everything is fine.
1080
1081 If Emacs was not in its own process group, then we know we're
1082 running under a shell (or a caller) that doesn't know how to
1083 separate itself from Emacs (like sh). Emacs must be in its own
1084 process group in order to receive SIGIO correctly. In this
1085 situation, we put ourselves in our own pgroup, forcibly set the
1086 tty's pgroup to our pgroup, and make sure to restore and reinstate
1087 the tty's pgroup just like any other terminal setting. If
1088 inherited_group was not the tty's pgroup, then we'll get a
1089 SIGTTmumble when we try to change the tty's pgroup, and a CONT if
1090 it goes foreground in the future, which is what should happen. */
1091int inherited_pgroup;
1092
1093/* Split off the foreground process group to Emacs alone.
1094 When we are in the foreground, but not started in our own process
1095 group, redirect the TTY to point to our own process group. We need
1096 to be in our own process group to receive SIGIO properly. */
1097void
1098narrow_foreground_group ()
1099{
1100 int me = getpid ();
1101
1102 setpgrp (0, inherited_pgroup);
1103 if (inherited_pgroup != me)
1104 EMACS_SET_TTY_PGRP (input_fd, &me);
1105 setpgrp (0, me);
1106}
1107
1108/* Set the tty to our original foreground group. */
1109void
1110widen_foreground_group ()
1111{
1112 if (inherited_pgroup != getpid ())
1113 EMACS_SET_TTY_PGRP (input_fd, &inherited_pgroup);
1114 setpgrp (0, inherited_pgroup);
1115}
1116
1117#endif /* BSD_PGRPS */
1118\f
1119/* Getting and setting emacs_tty structures. */
1120
1121/* Set *TC to the parameters associated with the terminal FD.
1122 Return zero if all's well, or -1 if we ran into an error we
1123 couldn't deal with. */
1124int
1125emacs_get_tty (fd, settings)
1126 int fd;
1127 struct emacs_tty *settings;
1128{
1129 /* Retrieve the primary parameters - baud rate, character size, etcetera. */
1130#ifdef HAVE_TCATTR
1131 /* We have those nifty POSIX tcmumbleattr functions. */
1132 bzero (&settings->main, sizeof (settings->main));
1133 if (tcgetattr (fd, &settings->main) < 0)
1134 return -1;
1135
1136#else
1137#ifdef HAVE_TERMIO
1138 /* The SYSV-style interface? */
1139 if (ioctl (fd, TCGETA, &settings->main) < 0)
1140 return -1;
1141
1142#else
1143#ifdef VMS
1144 /* Vehemently Monstrous System? :-) */
1145 if (! (SYS$QIOW (0, fd, IO$_SENSEMODE, settings, 0, 0,
1146 &settings->main.class, 12, 0, 0, 0, 0)
1147 & 1))
1148 return -1;
1149
1150#else
1151#ifndef DOS_NT
1152 /* I give up - I hope you have the BSD ioctls. */
1153 if (ioctl (fd, TIOCGETP, &settings->main) < 0)
1154 return -1;
1155#endif /* not DOS_NT */
1156#endif
1157#endif
1158#endif
1159
1160 /* Suivant - Do we have to get struct ltchars data? */
1161#ifdef HAVE_LTCHARS
1162 if (ioctl (fd, TIOCGLTC, &settings->ltchars) < 0)
1163 return -1;
1164#endif
1165
1166 /* How about a struct tchars and a wordful of lmode bits? */
1167#ifdef HAVE_TCHARS
1168 if (ioctl (fd, TIOCGETC, &settings->tchars) < 0
1169 || ioctl (fd, TIOCLGET, &settings->lmode) < 0)
1170 return -1;
1171#endif
1172
1173 /* We have survived the tempest. */
1174 return 0;
1175}
1176
1177
1178/* Set the parameters of the tty on FD according to the contents of
1179 *SETTINGS. If FLUSHP is non-zero, we discard input.
1180 Return 0 if all went well, and -1 if anything failed. */
1181
1182int
1183emacs_set_tty (fd, settings, flushp)
1184 int fd;
1185 struct emacs_tty *settings;
1186 int flushp;
1187{
1188 /* Set the primary parameters - baud rate, character size, etcetera. */
1189#ifdef HAVE_TCATTR
1190 int i;
1191 /* We have those nifty POSIX tcmumbleattr functions.
1192 William J. Smith <wjs@wiis.wang.com> writes:
1193 "POSIX 1003.1 defines tcsetattr to return success if it was
1194 able to perform any of the requested actions, even if some
1195 of the requested actions could not be performed.
1196 We must read settings back to ensure tty setup properly.
1197 AIX requires this to keep tty from hanging occasionally." */
1198 /* This make sure that we don't loop indefinitely in here. */
1199 for (i = 0 ; i < 10 ; i++)
1200 if (tcsetattr (fd, flushp ? TCSAFLUSH : TCSADRAIN, &settings->main) < 0)
1201 {
1202 if (errno == EINTR)
1203 continue;
1204 else
1205 return -1;
1206 }
1207 else
1208 {
1209 struct termios new;
1210
1211 bzero (&new, sizeof (new));
1212 /* Get the current settings, and see if they're what we asked for. */
1213 tcgetattr (fd, &new);
1214 /* We cannot use memcmp on the whole structure here because under
1215 * aix386 the termios structure has some reserved field that may
1216 * not be filled in.
1217 */
1218 if ( new.c_iflag == settings->main.c_iflag
1219 && new.c_oflag == settings->main.c_oflag
1220 && new.c_cflag == settings->main.c_cflag
1221 && new.c_lflag == settings->main.c_lflag
1222 && memcmp (new.c_cc, settings->main.c_cc, NCCS) == 0)
1223 break;
1224 else
1225 continue;
1226 }
1227
1228#else
1229#ifdef HAVE_TERMIO
1230 /* The SYSV-style interface? */
1231 if (ioctl (fd, flushp ? TCSETAF : TCSETAW, &settings->main) < 0)
1232 return -1;
1233
1234#else
1235#ifdef VMS
1236 /* Vehemently Monstrous System? :-) */
1237 if (! (SYS$QIOW (0, fd, IO$_SETMODE, &input_iosb, 0, 0,
1238 &settings->main.class, 12, 0, 0, 0, 0)
1239 & 1))
1240 return -1;
1241
1242#else
1243#ifndef DOS_NT
1244 /* I give up - I hope you have the BSD ioctls. */
1245 if (ioctl (fd, (flushp) ? TIOCSETP : TIOCSETN, &settings->main) < 0)
1246 return -1;
1247#endif /* not DOS_NT */
1248
1249#endif
1250#endif
1251#endif
1252
1253 /* Suivant - Do we have to get struct ltchars data? */
1254#ifdef HAVE_LTCHARS
1255 if (ioctl (fd, TIOCSLTC, &settings->ltchars) < 0)
1256 return -1;
1257#endif
1258
1259 /* How about a struct tchars and a wordful of lmode bits? */
1260#ifdef HAVE_TCHARS
1261 if (ioctl (fd, TIOCSETC, &settings->tchars) < 0
1262 || ioctl (fd, TIOCLSET, &settings->lmode) < 0)
1263 return -1;
1264#endif
1265
1266 /* We have survived the tempest. */
1267 return 0;
1268}
1269
1270\f
1271/* The initial tty mode bits */
1272struct emacs_tty old_tty;
1273
1274/* 1 if we have been through init_sys_modes. */
1275int term_initted;
1276
1277/* 1 if outer tty status has been recorded. */
1278int old_tty_valid;
1279
1280#ifdef BSD4_1
1281/* BSD 4.1 needs to keep track of the lmode bits in order to start
1282 sigio. */
1283int lmode;
1284#endif
1285
1286#ifndef F_SETOWN_BUG
1287#ifdef F_SETOWN
1288int old_fcntl_owner;
1289#endif /* F_SETOWN */
1290#endif /* F_SETOWN_BUG */
1291
1292/* This may also be defined in stdio,
1293 but if so, this does no harm,
1294 and using the same name avoids wasting the other one's space. */
1295
1296#ifdef nec_ews_svr4
1297extern char *_sobuf ;
1298#else
1299#if defined (USG) || defined (DGUX)
1300unsigned char _sobuf[BUFSIZ+8];
1301#else
1302char _sobuf[BUFSIZ];
1303#endif
1304#endif
1305
1306#ifdef HAVE_LTCHARS
1307static struct ltchars new_ltchars = {-1,-1,-1,-1,-1,-1};
1308#endif
1309#ifdef HAVE_TCHARS
1310static struct tchars new_tchars = {-1,-1,-1,-1,-1,-1};
1311#endif
1312
1313void
1314init_sys_modes ()
1315{
1316 struct emacs_tty tty;
1317
1318#ifdef MAC_OS8
1319/* cus-start.el complains if delete-exited-processes is not defined */
1320#ifndef subprocesses
1321 DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes,
1322 doc: /* *Non-nil means delete processes immediately when they exit.
1323nil means don't delete them until `list-processes' is run. */);
1324 delete_exited_processes = 0;
1325#endif
1326#endif /* MAC_OS8 */
1327
1328#ifdef VMS
1329#if 0
1330 static int oob_chars[2] = {0, 1 << 7}; /* catch C-g's */
1331 extern int (*interrupt_signal) ();
1332#endif
1333#endif
1334
1335 Vtty_erase_char = Qnil;
1336
1337 if (noninteractive)
1338 return;
1339
1340#ifdef VMS
1341 if (!input_ef)
1342 input_ef = get_kbd_event_flag ();
1343 /* LIB$GET_EF (&input_ef); */
1344 SYS$CLREF (input_ef);
1345 waiting_for_ast = 0;
1346 if (!timer_ef)
1347 timer_ef = get_timer_event_flag ();
1348 /* LIB$GET_EF (&timer_ef); */
1349 SYS$CLREF (timer_ef);
1350#if 0
1351 if (!process_ef)
1352 {
1353 LIB$GET_EF (&process_ef);
1354 SYS$CLREF (process_ef);
1355 }
1356 if (input_ef / 32 != process_ef / 32)
1357 croak ("Input and process event flags in different clusters.");
1358#endif
1359 if (input_ef / 32 != timer_ef / 32)
1360 croak ("Input and timer event flags in different clusters.");
1361#if 0
1362 input_eflist = ((unsigned) 1 << (input_ef % 32)) |
1363 ((unsigned) 1 << (process_ef % 32));
1364#endif
1365 timer_eflist = ((unsigned) 1 << (input_ef % 32)) |
1366 ((unsigned) 1 << (timer_ef % 32));
1367#ifndef VMS4_4
1368 sys_access_reinit ();
1369#endif
1370#endif /* not VMS */
1371
1372#ifdef BSD_PGRPS
1373 if (! read_socket_hook && EQ (Vwindow_system, Qnil))
1374 narrow_foreground_group ();
1375#endif
1376
1377#ifdef HAVE_WINDOW_SYSTEM
1378 /* Emacs' window system on MSDOG uses the `internal terminal' and therefore
1379 needs the initialization code below. */
1380 if (!read_socket_hook && EQ (Vwindow_system, Qnil))
1381#endif
1382 {
1383 EMACS_GET_TTY (input_fd, &old_tty);
1384
1385 old_tty_valid = 1;
1386
1387 tty = old_tty;
1388
1389#if defined (HAVE_TERMIO) || defined (HAVE_TERMIOS)
1390 XSETINT (Vtty_erase_char, old_tty.main.c_cc[VERASE]);
1391
1392#ifdef DGUX
1393 /* This allows meta to be sent on 8th bit. */
1394 tty.main.c_iflag &= ~INPCK; /* don't check input for parity */
1395#endif
1396 tty.main.c_iflag |= (IGNBRK); /* Ignore break condition */
1397 tty.main.c_iflag &= ~ICRNL; /* Disable map of CR to NL on input */
1398#ifdef INLCR /* I'm just being cautious,
1399 since I can't check how widespread INLCR is--rms. */
1400 tty.main.c_iflag &= ~INLCR; /* Disable map of NL to CR on input */
1401#endif
1402#ifdef ISTRIP
1403 tty.main.c_iflag &= ~ISTRIP; /* don't strip 8th bit on input */
1404#endif
1405 tty.main.c_lflag &= ~ECHO; /* Disable echo */
1406 tty.main.c_lflag &= ~ICANON; /* Disable erase/kill processing */
1407#ifdef IEXTEN
1408 tty.main.c_lflag &= ~IEXTEN; /* Disable other editing characters. */
1409#endif
1410 tty.main.c_lflag |= ISIG; /* Enable signals */
1411 if (flow_control)
1412 {
1413 tty.main.c_iflag |= IXON; /* Enable start/stop output control */
1414#ifdef IXANY
1415 tty.main.c_iflag &= ~IXANY;
1416#endif /* IXANY */
1417 }
1418 else
1419 tty.main.c_iflag &= ~IXON; /* Disable start/stop output control */
1420 tty.main.c_oflag &= ~ONLCR; /* Disable map of NL to CR-NL
1421 on output */
1422 tty.main.c_oflag &= ~TAB3; /* Disable tab expansion */
1423#ifdef CS8
1424 if (meta_key)
1425 {
1426 tty.main.c_cflag |= CS8; /* allow 8th bit on input */
1427 tty.main.c_cflag &= ~PARENB;/* Don't check parity */
1428 }
1429#endif
1430 tty.main.c_cc[VINTR] = quit_char; /* C-g (usually) gives SIGINT */
1431 /* Set up C-g for both SIGQUIT and SIGINT.
1432 We don't know which we will get, but we handle both alike
1433 so which one it really gives us does not matter. */
1434 tty.main.c_cc[VQUIT] = quit_char;
1435 tty.main.c_cc[VMIN] = 1; /* Input should wait for at least 1 char */
1436 tty.main.c_cc[VTIME] = 0; /* no matter how long that takes. */
1437#ifdef VSWTCH
1438 tty.main.c_cc[VSWTCH] = CDISABLE; /* Turn off shell layering use
1439 of C-z */
1440#endif /* VSWTCH */
1441
1442#if defined (mips) || defined (HAVE_TCATTR)
1443#ifdef VSUSP
1444 tty.main.c_cc[VSUSP] = CDISABLE; /* Turn off mips handling of C-z. */
1445#endif /* VSUSP */
1446#ifdef V_DSUSP
1447 tty.main.c_cc[V_DSUSP] = CDISABLE; /* Turn off mips handling of C-y. */
1448#endif /* V_DSUSP */
1449#ifdef VDSUSP /* Some systems have VDSUSP, some have V_DSUSP. */
1450 tty.main.c_cc[VDSUSP] = CDISABLE;
1451#endif /* VDSUSP */
1452#ifdef VLNEXT
1453 tty.main.c_cc[VLNEXT] = CDISABLE;
1454#endif /* VLNEXT */
1455#ifdef VREPRINT
1456 tty.main.c_cc[VREPRINT] = CDISABLE;
1457#endif /* VREPRINT */
1458#ifdef VWERASE
1459 tty.main.c_cc[VWERASE] = CDISABLE;
1460#endif /* VWERASE */
1461#ifdef VDISCARD
1462 tty.main.c_cc[VDISCARD] = CDISABLE;
1463#endif /* VDISCARD */
1464
1465 if (flow_control)
1466 {
1467#ifdef VSTART
1468 tty.main.c_cc[VSTART] = '\021';
1469#endif /* VSTART */
1470#ifdef VSTOP
1471 tty.main.c_cc[VSTOP] = '\023';
1472#endif /* VSTOP */
1473 }
1474 else
1475 {
1476#ifdef VSTART
1477 tty.main.c_cc[VSTART] = CDISABLE;
1478#endif /* VSTART */
1479#ifdef VSTOP
1480 tty.main.c_cc[VSTOP] = CDISABLE;
1481#endif /* VSTOP */
1482 }
1483#endif /* mips or HAVE_TCATTR */
1484
1485#ifdef SET_LINE_DISCIPLINE
1486 /* Need to explicitly request TERMIODISC line discipline or
1487 Ultrix's termios does not work correctly. */
1488 tty.main.c_line = SET_LINE_DISCIPLINE;
1489#endif
1490#ifdef AIX
1491#ifndef IBMR2AIX
1492 /* AIX enhanced edit loses NULs, so disable it. */
1493 tty.main.c_line = 0;
1494 tty.main.c_iflag &= ~ASCEDIT;
1495#else
1496 tty.main.c_cc[VSTRT] = 255;
1497 tty.main.c_cc[VSTOP] = 255;
1498 tty.main.c_cc[VSUSP] = 255;
1499 tty.main.c_cc[VDSUSP] = 255;
1500#endif /* IBMR2AIX */
1501 if (flow_control)
1502 {
1503#ifdef VSTART
1504 tty.main.c_cc[VSTART] = '\021';
1505#endif /* VSTART */
1506#ifdef VSTOP
1507 tty.main.c_cc[VSTOP] = '\023';
1508#endif /* VSTOP */
1509 }
1510 /* Also, PTY overloads NUL and BREAK.
1511 don't ignore break, but don't signal either, so it looks like NUL.
1512 This really serves a purpose only if running in an XTERM window
1513 or via TELNET or the like, but does no harm elsewhere. */
1514 tty.main.c_iflag &= ~IGNBRK;
1515 tty.main.c_iflag &= ~BRKINT;
1516#endif
1517#else /* if not HAVE_TERMIO */
1518#ifdef VMS
1519 tty.main.tt_char |= TT$M_NOECHO;
1520 if (meta_key)
1521 tty.main.tt_char |= TT$M_EIGHTBIT;
1522 if (flow_control)
1523 tty.main.tt_char |= TT$M_TTSYNC;
1524 else
1525 tty.main.tt_char &= ~TT$M_TTSYNC;
1526 tty.main.tt2_char |= TT2$M_PASTHRU | TT2$M_XON;
1527#else /* not VMS (BSD, that is) */
1528#ifndef DOS_NT
1529 XSETINT (Vtty_erase_char, tty.main.sg_erase);
1530 tty.main.sg_flags &= ~(ECHO | CRMOD | XTABS);
1531 if (meta_key)
1532 tty.main.sg_flags |= ANYP;
1533 tty.main.sg_flags |= interrupt_input ? RAW : CBREAK;
1534#endif /* not DOS_NT */
1535#endif /* not VMS (BSD, that is) */
1536#endif /* not HAVE_TERMIO */
1537
1538 /* If going to use CBREAK mode, we must request C-g to interrupt
1539 and turn off start and stop chars, etc. If not going to use
1540 CBREAK mode, do this anyway so as to turn off local flow
1541 control for user coming over network on 4.2; in this case,
1542 only t_stopc and t_startc really matter. */
1543#ifndef HAVE_TERMIO
1544#ifdef HAVE_TCHARS
1545 /* Note: if not using CBREAK mode, it makes no difference how we
1546 set this */
1547 tty.tchars = new_tchars;
1548 tty.tchars.t_intrc = quit_char;
1549 if (flow_control)
1550 {
1551 tty.tchars.t_startc = '\021';
1552 tty.tchars.t_stopc = '\023';
1553 }
1554
1555 tty.lmode = LDECCTQ | LLITOUT | LPASS8 | LNOFLSH | old_tty.lmode;
1556#ifdef ultrix
1557 /* Under Ultrix 4.2a, leaving this out doesn't seem to hurt
1558 anything, and leaving it in breaks the meta key. Go figure. */
1559 tty.lmode &= ~LLITOUT;
1560#endif
1561
1562#ifdef BSD4_1
1563 lmode = tty.lmode;
1564#endif
1565
1566#endif /* HAVE_TCHARS */
1567#endif /* not HAVE_TERMIO */
1568
1569#ifdef HAVE_LTCHARS
1570 tty.ltchars = new_ltchars;
1571#endif /* HAVE_LTCHARS */
1572#ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida, MW Aug 1993 */
1573 if (!term_initted)
1574 internal_terminal_init ();
1575 dos_ttraw ();
1576#endif
1577
1578 EMACS_SET_TTY (input_fd, &tty, 0);
1579
1580 /* This code added to insure that, if flow-control is not to be used,
1581 we have an unlocked terminal at the start. */
1582
1583#ifdef TCXONC
1584 if (!flow_control) ioctl (input_fd, TCXONC, 1);
1585#endif
1586#ifndef APOLLO
1587#ifdef TIOCSTART
1588 if (!flow_control) ioctl (input_fd, TIOCSTART, 0);
1589#endif
1590#endif
1591
1592#if defined (HAVE_TERMIOS) || defined (HPUX9)
1593#ifdef TCOON
1594 if (!flow_control) tcflow (input_fd, TCOON);
1595#endif
1596#endif
1597
1598#ifdef AIXHFT
1599 hft_init ();
1600#ifdef IBMR2AIX
1601 {
1602 /* IBM's HFT device usually thinks a ^J should be LF/CR. We need it
1603 to be only LF. This is the way that is done. */
1604 struct termio tty;
1605
1606 if (ioctl (1, HFTGETID, &tty) != -1)
1607 write (1, "\033[20l", 5);
1608 }
1609#endif
1610#endif /* AIXHFT */
1611
1612#ifdef VMS
1613/* Appears to do nothing when in PASTHRU mode.
1614 SYS$QIOW (0, input_fd, IO$_SETMODE|IO$M_OUTBAND, 0, 0, 0,
1615 interrupt_signal, oob_chars, 0, 0, 0, 0);
1616*/
1617 queue_kbd_input (0);
1618#endif /* VMS */
1619 }
1620
1621#ifdef F_SETFL
1622#ifndef F_SETOWN_BUG
1623#ifdef F_GETOWN /* F_SETFL does not imply existence of F_GETOWN */
1624 if (interrupt_input
1625 && ! read_socket_hook && EQ (Vwindow_system, Qnil))
1626 {
1627 old_fcntl_owner = fcntl (input_fd, F_GETOWN, 0);
1628 fcntl (input_fd, F_SETOWN, getpid ());
1629 init_sigio (input_fd);
1630 }
1631#endif /* F_GETOWN */
1632#endif /* F_SETOWN_BUG */
1633#endif /* F_SETFL */
1634
1635#ifdef BSD4_1
1636 if (interrupt_input)
1637 init_sigio (input_fd);
1638#endif
1639
1640#ifdef VMS /* VMS sometimes has this symbol but lacks setvbuf. */
1641#undef _IOFBF
1642#endif
1643#ifdef _IOFBF
1644 /* This symbol is defined on recent USG systems.
1645 Someone says without this call USG won't really buffer the file
1646 even with a call to setbuf. */
1647 setvbuf (stdout, (char *) _sobuf, _IOFBF, sizeof _sobuf);
1648#else
1649 setbuf (stdout, (char *) _sobuf);
1650#endif
1651#ifdef HAVE_WINDOW_SYSTEM
1652 /* Emacs' window system on MSDOG uses the `internal terminal' and therefore
1653 needs the initialization code below. */
1654 if (EQ (Vwindow_system, Qnil)
1655#ifndef WINDOWSNT
1656 /* When running in tty mode on NT/Win95, we have a read_socket
1657 hook, but still need the rest of the initialization code below. */
1658 && (! read_socket_hook)
1659#endif
1660 )
1661#endif
1662 set_terminal_modes ();
1663
1664 if (!term_initted
1665 && FRAMEP (Vterminal_frame)
1666 && FRAME_TERMCAP_P (XFRAME (Vterminal_frame)))
1667 init_frame_faces (XFRAME (Vterminal_frame));
1668
1669 if (term_initted && no_redraw_on_reenter)
1670 {
1671 if (display_completed)
1672 direct_output_forward_char (0);
1673 }
1674 else
1675 {
1676 frame_garbaged = 1;
1677 if (FRAMEP (Vterminal_frame))
1678 FRAME_GARBAGED_P (XFRAME (Vterminal_frame)) = 1;
1679 }
1680
1681 term_initted = 1;
1682}
1683
1684/* Return nonzero if safe to use tabs in output.
1685 At the time this is called, init_sys_modes has not been done yet. */
1686
1687int
1688tabs_safe_p ()
1689{
1690 struct emacs_tty tty;
1691
1692 EMACS_GET_TTY (input_fd, &tty);
1693 return EMACS_TTY_TABS_OK (&tty);
1694}
1695\f
1696/* Get terminal size from system.
1697 Store number of lines into *HEIGHTP and width into *WIDTHP.
1698 We store 0 if there's no valid information. */
1699
1700void
1701get_frame_size (widthp, heightp)
1702 int *widthp, *heightp;
1703{
1704
1705#ifdef TIOCGWINSZ
1706
1707 /* BSD-style. */
1708 struct winsize size;
1709
1710 if (ioctl (input_fd, TIOCGWINSZ, &size) == -1)
1711 *widthp = *heightp = 0;
1712 else
1713 {
1714 *widthp = size.ws_col;
1715 *heightp = size.ws_row;
1716 }
1717
1718#else
1719#ifdef TIOCGSIZE
1720
1721 /* SunOS - style. */
1722 struct ttysize size;
1723
1724 if (ioctl (input_fd, TIOCGSIZE, &size) == -1)
1725 *widthp = *heightp = 0;
1726 else
1727 {
1728 *widthp = size.ts_cols;
1729 *heightp = size.ts_lines;
1730 }
1731
1732#else
1733#ifdef VMS
1734
1735 struct sensemode tty;
1736
1737 SYS$QIOW (0, input_fd, IO$_SENSEMODE, &tty, 0, 0,
1738 &tty.class, 12, 0, 0, 0, 0);
1739 *widthp = tty.scr_wid;
1740 *heightp = tty.scr_len;
1741
1742#else
1743#ifdef MSDOS
1744 *widthp = ScreenCols ();
1745 *heightp = ScreenRows ();
1746#else /* system doesn't know size */
1747 *widthp = 0;
1748 *heightp = 0;
1749#endif
1750
1751#endif /* not VMS */
1752#endif /* not SunOS-style */
1753#endif /* not BSD-style */
1754}
1755
1756/* Set the logical window size associated with descriptor FD
1757 to HEIGHT and WIDTH. This is used mainly with ptys. */
1758
1759int
1760set_window_size (fd, height, width)
1761 int fd, height, width;
1762{
1763#ifdef TIOCSWINSZ
1764
1765 /* BSD-style. */
1766 struct winsize size;
1767 size.ws_row = height;
1768 size.ws_col = width;
1769
1770 if (ioctl (fd, TIOCSWINSZ, &size) == -1)
1771 return 0; /* error */
1772 else
1773 return 1;
1774
1775#else
1776#ifdef TIOCSSIZE
1777
1778 /* SunOS - style. */
1779 struct ttysize size;
1780 size.ts_lines = height;
1781 size.ts_cols = width;
1782
1783 if (ioctl (fd, TIOCGSIZE, &size) == -1)
1784 return 0;
1785 else
1786 return 1;
1787#else
1788 return -1;
1789#endif /* not SunOS-style */
1790#endif /* not BSD-style */
1791}
1792
1793\f
1794/* Prepare the terminal for exiting Emacs; move the cursor to the
1795 bottom of the frame, turn off interrupt-driven I/O, etc. */
1796void
1797reset_sys_modes ()
1798{
1799 struct frame *sf;
1800
1801 if (noninteractive)
1802 {
1803 fflush (stdout);
1804 return;
1805 }
1806 if (!term_initted)
1807 return;
1808#ifdef HAVE_WINDOW_SYSTEM
1809 /* Emacs' window system on MSDOG uses the `internal terminal' and therefore
1810 needs the clean-up code below. */
1811 if (!EQ (Vwindow_system, Qnil)
1812#ifndef WINDOWSNT
1813 /* When running in tty mode on NT/Win95, we have a read_socket
1814 hook, but still need the rest of the clean-up code below. */
1815 || read_socket_hook
1816#endif
1817 )
1818 return;
1819#endif
1820 sf = SELECTED_FRAME ();
1821 cursor_to (FRAME_HEIGHT (sf) - 1, 0);
1822 clear_end_of_line (FRAME_WIDTH (sf));
1823 /* clear_end_of_line may move the cursor */
1824 cursor_to (FRAME_HEIGHT (sf) - 1, 0);
1825#if defined (IBMR2AIX) && defined (AIXHFT)
1826 {
1827 /* HFT devices normally use ^J as a LF/CR. We forced it to
1828 do the LF only. Now, we need to reset it. */
1829 struct termio tty;
1830
1831 if (ioctl (1, HFTGETID, &tty) != -1)
1832 write (1, "\033[20h", 5);
1833 }
1834#endif
1835
1836 reset_terminal_modes ();
1837 fflush (stdout);
1838#ifdef BSD_SYSTEM
1839#ifndef BSD4_1
1840 /* Avoid possible loss of output when changing terminal modes. */
1841 fsync (fileno (stdout));
1842#endif
1843#endif
1844
1845#ifdef F_SETFL
1846#ifndef F_SETOWN_BUG
1847#ifdef F_SETOWN /* F_SETFL does not imply existence of F_SETOWN */
1848 if (interrupt_input)
1849 {
1850 reset_sigio ();
1851 fcntl (input_fd, F_SETOWN, old_fcntl_owner);
1852 }
1853#endif /* F_SETOWN */
1854#endif /* F_SETOWN_BUG */
1855#ifdef O_NDELAY
1856 fcntl (input_fd, F_SETFL, fcntl (input_fd, F_GETFL, 0) & ~O_NDELAY);
1857#endif
1858#endif /* F_SETFL */
1859#ifdef BSD4_1
1860 if (interrupt_input)
1861 reset_sigio ();
1862#endif /* BSD4_1 */
1863
1864 if (old_tty_valid)
1865 while (EMACS_SET_TTY (input_fd, &old_tty, 0) < 0 && errno == EINTR)
1866 ;
1867
1868#ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */
1869 dos_ttcooked ();
1870#endif
1871
1872#ifdef SET_LINE_DISCIPLINE
1873 /* Ultrix's termios *ignores* any line discipline except TERMIODISC.
1874 A different old line discipline is therefore not restored, yet.
1875 Restore the old line discipline by hand. */
1876 ioctl (0, TIOCSETD, &old_tty.main.c_line);
1877#endif
1878
1879#ifdef AIXHFT
1880 hft_reset ();
1881#endif
1882
1883#ifdef BSD_PGRPS
1884 widen_foreground_group ();
1885#endif
1886}
1887\f
1888#ifdef HAVE_PTYS
1889
1890/* Set up the proper status flags for use of a pty. */
1891
1892void
1893setup_pty (fd)
1894 int fd;
1895{
1896 /* I'm told that TOICREMOTE does not mean control chars
1897 "can't be sent" but rather that they don't have
1898 input-editing or signaling effects.
1899 That should be good, because we have other ways
1900 to do those things in Emacs.
1901 However, telnet mode seems not to work on 4.2.
1902 So TIOCREMOTE is turned off now. */
1903
1904 /* Under hp-ux, if TIOCREMOTE is turned on, some calls
1905 will hang. In particular, the "timeout" feature (which
1906 causes a read to return if there is no data available)
1907 does this. Also it is known that telnet mode will hang
1908 in such a way that Emacs must be stopped (perhaps this
1909 is the same problem).
1910
1911 If TIOCREMOTE is turned off, then there is a bug in
1912 hp-ux which sometimes loses data. Apparently the
1913 code which blocks the master process when the internal
1914 buffer fills up does not work. Other than this,
1915 though, everything else seems to work fine.
1916
1917 Since the latter lossage is more benign, we may as well
1918 lose that way. -- cph */
1919#ifdef FIONBIO
1920#if defined(SYSV_PTYS) || defined(UNIX98_PTYS)
1921 {
1922 int on = 1;
1923 ioctl (fd, FIONBIO, &on);
1924 }
1925#endif
1926#endif
1927#ifdef IBMRTAIX
1928 /* On AIX, the parent gets SIGHUP when a pty attached child dies. So, we */
1929 /* ignore SIGHUP once we've started a child on a pty. Note that this may */
1930 /* cause EMACS not to die when it should, i.e., when its own controlling */
1931 /* tty goes away. I've complained to the AIX developers, and they may */
1932 /* change this behavior, but I'm not going to hold my breath. */
1933 signal (SIGHUP, SIG_IGN);
1934#endif
1935}
1936#endif /* HAVE_PTYS */
1937\f
1938#ifdef VMS
1939
1940/* Assigning an input channel is done at the start of Emacs execution.
1941 This is called each time Emacs is resumed, also, but does nothing
1942 because input_chain is no longer zero. */
1943
1944void
1945init_vms_input ()
1946{
1947 int status;
1948
1949 if (input_fd == 0)
1950 {
1951 status = SYS$ASSIGN (&input_dsc, &input_fd, 0, 0);
1952 if (! (status & 1))
1953 LIB$STOP (status);
1954 }
1955}
1956
1957/* Deassigning the input channel is done before exiting. */
1958
1959void
1960stop_vms_input ()
1961{
1962 return SYS$DASSGN (input_fd);
1963}
1964
1965short input_buffer;
1966
1967/* Request reading one character into the keyboard buffer.
1968 This is done as soon as the buffer becomes empty. */
1969
1970void
1971queue_kbd_input ()
1972{
1973 int status;
1974 extern kbd_input_ast ();
1975
1976 waiting_for_ast = 0;
1977 stop_input = 0;
1978 status = SYS$QIO (0, input_fd, IO$_READVBLK,
1979 &input_iosb, kbd_input_ast, 1,
1980 &input_buffer, 1, 0, terminator_mask, 0, 0);
1981}
1982
1983int input_count;
1984
1985/* Ast routine that is called when keyboard input comes in
1986 in accord with the SYS$QIO above. */
1987
1988void
1989kbd_input_ast ()
1990{
1991 register int c = -1;
1992 int old_errno = errno;
1993 extern EMACS_TIME *input_available_clear_time;
1994
1995 if (waiting_for_ast)
1996 SYS$SETEF (input_ef);
1997 waiting_for_ast = 0;
1998 input_count++;
1999#ifdef ASTDEBUG
2000 if (input_count == 25)
2001 exit (1);
2002 printf ("Ast # %d,", input_count);
2003 printf (" iosb = %x, %x, %x, %x",
2004 input_iosb.offset, input_iosb.status, input_iosb.termlen,
2005 input_iosb.term);
2006#endif
2007 if (input_iosb.offset)
2008 {
2009 c = input_buffer;
2010#ifdef ASTDEBUG
2011 printf (", char = 0%o", c);
2012#endif
2013 }
2014#ifdef ASTDEBUG
2015 printf ("\n");
2016 fflush (stdout);
2017 sleep (1);
2018#endif
2019 if (! stop_input)
2020 queue_kbd_input ();
2021 if (c >= 0)
2022 {
2023 struct input_event e;
2024 e.kind = ASCII_KEYSTROKE_EVENT;
2025 XSETINT (e.code, c);
2026 e.frame_or_window = selected_frame;
2027 kbd_buffer_store_event (&e);
2028 }
2029 if (input_available_clear_time)
2030 EMACS_SET_SECS_USECS (*input_available_clear_time, 0, 0);
2031 errno = old_errno;
2032}
2033
2034/* Wait until there is something in kbd_buffer. */
2035
2036void
2037wait_for_kbd_input ()
2038{
2039 extern int have_process_input, process_exited;
2040
2041 /* If already something, avoid doing system calls. */
2042 if (detect_input_pending ())
2043 {
2044 return;
2045 }
2046 /* Clear a flag, and tell ast routine above to set it. */
2047 SYS$CLREF (input_ef);
2048 waiting_for_ast = 1;
2049 /* Check for timing error: ast happened while we were doing that. */
2050 if (!detect_input_pending ())
2051 {
2052 /* No timing error: wait for flag to be set. */
2053 set_waiting_for_input (0);
2054 SYS$WFLOR (input_ef, input_eflist);
2055 clear_waiting_for_input ();
2056 if (!detect_input_pending ())
2057 /* Check for subprocess input availability */
2058 {
2059 int dsp = have_process_input || process_exited;
2060
2061 SYS$CLREF (process_ef);
2062 if (have_process_input)
2063 process_command_input ();
2064 if (process_exited)
2065 process_exit ();
2066 if (dsp)
2067 {
2068 update_mode_lines++;
2069 prepare_menu_bars ();
2070 redisplay_preserve_echo_area (18);
2071 }
2072 }
2073 }
2074 waiting_for_ast = 0;
2075}
2076
2077/* Get rid of any pending QIO, when we are about to suspend
2078 or when we want to throw away pending input.
2079 We wait for a positive sign that the AST routine has run
2080 and therefore there is no I/O request queued when we return.
2081 SYS$SETAST is used to avoid a timing error. */
2082
2083void
2084end_kbd_input ()
2085{
2086#ifdef ASTDEBUG
2087 printf ("At end_kbd_input.\n");
2088 fflush (stdout);
2089 sleep (1);
2090#endif
2091 if (LIB$AST_IN_PROG ()) /* Don't wait if suspending from kbd_buffer_store_event! */
2092 {
2093 SYS$CANCEL (input_fd);
2094 return;
2095 }
2096
2097 SYS$SETAST (0);
2098 /* Clear a flag, and tell ast routine above to set it. */
2099 SYS$CLREF (input_ef);
2100 waiting_for_ast = 1;
2101 stop_input = 1;
2102 SYS$CANCEL (input_fd);
2103 SYS$SETAST (1);
2104 SYS$WAITFR (input_ef);
2105 waiting_for_ast = 0;
2106}
2107
2108/* Wait for either input available or time interval expiry. */
2109
2110void
2111input_wait_timeout (timeval)
2112 int timeval; /* Time to wait, in seconds */
2113{
2114 int time [2];
2115 static int zero = 0;
2116 static int large = -10000000;
2117
2118 LIB$EMUL (&timeval, &large, &zero, time); /* Convert to VMS format */
2119
2120 /* If already something, avoid doing system calls. */
2121 if (detect_input_pending ())
2122 {
2123 return;
2124 }
2125 /* Clear a flag, and tell ast routine above to set it. */
2126 SYS$CLREF (input_ef);
2127 waiting_for_ast = 1;
2128 /* Check for timing error: ast happened while we were doing that. */
2129 if (!detect_input_pending ())
2130 {
2131 /* No timing error: wait for flag to be set. */
2132 SYS$CANTIM (1, 0);
2133 if (SYS$SETIMR (timer_ef, time, 0, 1) & 1) /* Set timer */
2134 SYS$WFLOR (timer_ef, timer_eflist); /* Wait for timer expiry or input */
2135 }
2136 waiting_for_ast = 0;
2137}
2138
2139/* The standard `sleep' routine works some other way
2140 and it stops working if you have ever quit out of it.
2141 This one continues to work. */
2142
2143sys_sleep (timeval)
2144 int timeval;
2145{
2146 int time [2];
2147 static int zero = 0;
2148 static int large = -10000000;
2149
2150 LIB$EMUL (&timeval, &large, &zero, time); /* Convert to VMS format */
2151
2152 SYS$CANTIM (1, 0);
2153 if (SYS$SETIMR (timer_ef, time, 0, 1) & 1) /* Set timer */
2154 SYS$WAITFR (timer_ef); /* Wait for timer expiry only */
2155}
2156
2157void
2158init_sigio (fd)
2159 int fd;
2160{
2161 request_sigio ();
2162}
2163
2164reset_sigio ()
2165{
2166 unrequest_sigio ();
2167}
2168
2169void
2170request_sigio ()
2171{
2172 croak ("request sigio");
2173}
2174
2175void
2176unrequest_sigio ()
2177{
2178 croak ("unrequest sigio");
2179}
2180
2181#endif /* VMS */
2182\f
2183/* Note that VMS compiler won't accept defined (CANNOT_DUMP). */
2184#ifndef CANNOT_DUMP
2185#define NEED_STARTS
2186#endif
2187
2188#ifndef SYSTEM_MALLOC
2189#ifndef NEED_STARTS
2190#define NEED_STARTS
2191#endif
2192#endif
2193
2194#ifdef NEED_STARTS
2195/* Some systems that cannot dump also cannot implement these. */
2196
2197/*
2198 * Return the address of the start of the text segment prior to
2199 * doing an unexec. After unexec the return value is undefined.
2200 * See crt0.c for further explanation and _start.
2201 *
2202 */
2203
2204#if !(defined (__NetBSD__) && defined (__ELF__))
2205#ifndef HAVE_TEXT_START
2206char *
2207start_of_text ()
2208{
2209#ifdef TEXT_START
2210 return ((char *) TEXT_START);
2211#else
2212#ifdef GOULD
2213 extern csrt ();
2214 return ((char *) csrt);
2215#else /* not GOULD */
2216 extern int _start ();
2217 return ((char *) _start);
2218#endif /* GOULD */
2219#endif /* TEXT_START */
2220}
2221#endif /* not HAVE_TEXT_START */
2222#endif
2223
2224/*
2225 * Return the address of the start of the data segment prior to
2226 * doing an unexec. After unexec the return value is undefined.
2227 * See crt0.c for further information and definition of data_start.
2228 *
2229 * Apparently, on BSD systems this is etext at startup. On
2230 * USG systems (swapping) this is highly mmu dependent and
2231 * is also dependent on whether or not the program is running
2232 * with shared text. Generally there is a (possibly large)
2233 * gap between end of text and start of data with shared text.
2234 *
2235 * On Uniplus+ systems with shared text, data starts at a
2236 * fixed address. Each port (from a given oem) is generally
2237 * different, and the specific value of the start of data can
2238 * be obtained via the UniPlus+ specific "uvar" system call,
2239 * however the method outlined in crt0.c seems to be more portable.
2240 *
2241 * Probably what will have to happen when a USG unexec is available,
2242 * at least on UniPlus, is temacs will have to be made unshared so
2243 * that text and data are contiguous. Then once loadup is complete,
2244 * unexec will produce a shared executable where the data can be
2245 * at the normal shared text boundary and the startofdata variable
2246 * will be patched by unexec to the correct value.
2247 *
2248 */
2249
2250#ifndef start_of_data
2251char *
2252start_of_data ()
2253{
2254#ifdef DATA_START
2255 return ((char *) DATA_START);
2256#else
2257#ifdef ORDINARY_LINK
2258 /*
2259 * This is a hack. Since we're not linking crt0.c or pre_crt0.c,
2260 * data_start isn't defined. We take the address of environ, which
2261 * is known to live at or near the start of the system crt0.c, and
2262 * we don't sweat the handful of bytes that might lose.
2263 */
2264 extern char **environ;
2265
2266 return ((char *) &environ);
2267#else
2268 extern int data_start;
2269 return ((char *) &data_start);
2270#endif /* ORDINARY_LINK */
2271#endif /* DATA_START */
2272}
2273#endif /* start_of_data */
2274#endif /* NEED_STARTS (not CANNOT_DUMP or not SYSTEM_MALLOC) */
2275\f
2276/* init_system_name sets up the string for the Lisp function
2277 system-name to return. */
2278
2279#ifdef BSD4_1
2280#include <whoami.h>
2281#endif
2282
2283extern Lisp_Object Vsystem_name;
2284
2285#ifndef BSD4_1
2286#ifndef VMS
2287#ifdef HAVE_SOCKETS
2288#include <sys/socket.h>
2289#include <netdb.h>
2290#endif /* HAVE_SOCKETS */
2291#endif /* not VMS */
2292#endif /* not BSD4_1 */
2293
2294#ifdef TRY_AGAIN
2295#ifndef HAVE_H_ERRNO
2296extern int h_errno;
2297#endif
2298#endif /* TRY_AGAIN */
2299
2300void
2301init_system_name ()
2302{
2303#ifdef BSD4_1
2304 Vsystem_name = build_string (sysname);
2305#else
2306#ifdef VMS
2307 char *sp, *end;
2308 if ((sp = egetenv ("SYS$NODE")) == 0)
2309 Vsystem_name = build_string ("vax-vms");
2310 else if ((end = index (sp, ':')) == 0)
2311 Vsystem_name = build_string (sp);
2312 else
2313 Vsystem_name = make_string (sp, end - sp);
2314#else
2315#ifndef HAVE_GETHOSTNAME
2316 struct utsname uts;
2317 uname (&uts);
2318 Vsystem_name = build_string (uts.nodename);
2319#else /* HAVE_GETHOSTNAME */
2320 unsigned int hostname_size = 256;
2321 char *hostname = (char *) alloca (hostname_size);
2322
2323 /* Try to get the host name; if the buffer is too short, try
2324 again. Apparently, the only indication gethostname gives of
2325 whether the buffer was large enough is the presence or absence
2326 of a '\0' in the string. Eech. */
2327 for (;;)
2328 {
2329 gethostname (hostname, hostname_size - 1);
2330 hostname[hostname_size - 1] = '\0';
2331
2332 /* Was the buffer large enough for the '\0'? */
2333 if (strlen (hostname) < hostname_size - 1)
2334 break;
2335
2336 hostname_size <<= 1;
2337 hostname = (char *) alloca (hostname_size);
2338 }
2339#ifdef HAVE_SOCKETS
2340 /* Turn the hostname into the official, fully-qualified hostname.
2341 Don't do this if we're going to dump; this can confuse system
2342 libraries on some machines and make the dumped emacs core dump. */
2343#ifndef CANNOT_DUMP
2344 if (initialized)
2345#endif /* not CANNOT_DUMP */
2346 if (! index (hostname, '.'))
2347 {
2348 struct hostent *hp;
2349 int count;
2350 for (count = 0;; count++)
2351 {
2352#ifdef TRY_AGAIN
2353 h_errno = 0;
2354#endif
2355 hp = gethostbyname (hostname);
2356#ifdef TRY_AGAIN
2357 if (! (hp == 0 && h_errno == TRY_AGAIN))
2358#endif
2359 break;
2360 if (count >= 5)
2361 break;
2362 Fsleep_for (make_number (1), Qnil);
2363 }
2364 if (hp)
2365 {
2366 char *fqdn = (char *) hp->h_name;
2367#if 0
2368 char *p;
2369#endif
2370
2371 if (!index (fqdn, '.'))
2372 {
2373 /* We still don't have a fully qualified domain name.
2374 Try to find one in the list of alternate names */
2375 char **alias = hp->h_aliases;
2376 while (*alias && !index (*alias, '.'))
2377 alias++;
2378 if (*alias)
2379 fqdn = *alias;
2380 }
2381 hostname = fqdn;
2382#if 0
2383 /* Convert the host name to lower case. */
2384 /* Using ctype.h here would introduce a possible locale
2385 dependence that is probably wrong for hostnames. */
2386 p = hostname;
2387 while (*p)
2388 {
2389 if (*p >= 'A' && *p <= 'Z')
2390 *p += 'a' - 'A';
2391 p++;
2392 }
2393#endif
2394 }
2395 }
2396#endif /* HAVE_SOCKETS */
2397 /* We used to try using getdomainname here,
2398 but NIIBE Yutaka <gniibe@etl.go.jp> says that
2399 getdomainname gets the NIS/YP domain which often is not the same
2400 as in Internet domain name. */
2401#if 0 /* Turned off because sysinfo is not really likely to return the
2402 correct Internet domain. */
2403#if (HAVE_SYSINFO && defined (SI_SRPC_DOMAIN))
2404 if (! index (hostname, '.'))
2405 {
2406 /* The hostname is not fully qualified. Append the domain name. */
2407
2408 int hostlen = strlen (hostname);
2409 int domain_size = 256;
2410
2411 for (;;)
2412 {
2413 char *domain = (char *) alloca (domain_size + 1);
2414 char *fqdn = (char *) alloca (hostlen + 1 + domain_size + 1);
2415 int sys_domain_size = sysinfo (SI_SRPC_DOMAIN, domain, domain_size);
2416 if (sys_domain_size <= 0)
2417 break;
2418 if (domain_size < sys_domain_size)
2419 {
2420 domain_size = sys_domain_size;
2421 continue;
2422 }
2423 strcpy (fqdn, hostname);
2424 if (domain[0] == '.')
2425 strcpy (fqdn + hostlen, domain);
2426 else if (domain[0] != 0)
2427 {
2428 fqdn[hostlen] = '.';
2429 strcpy (fqdn + hostlen + 1, domain);
2430 }
2431 hostname = fqdn;
2432 break;
2433 }
2434 }
2435#endif /* HAVE_SYSINFO && defined (SI_SRPC_DOMAIN) */
2436#endif /* 0 */
2437 Vsystem_name = build_string (hostname);
2438#endif /* HAVE_GETHOSTNAME */
2439#endif /* VMS */
2440#endif /* BSD4_1 */
2441 {
2442 unsigned char *p;
2443 for (p = SDATA (Vsystem_name); *p; p++)
2444 if (*p == ' ' || *p == '\t')
2445 *p = '-';
2446 }
2447}
2448\f
2449#ifndef MSDOS
2450#ifndef VMS
2451#if !defined (HAVE_SELECT) || defined (BROKEN_SELECT_NON_X)
2452
2453#include "sysselect.h"
2454#undef select
2455
2456#if defined (HAVE_X_WINDOWS) && !defined (HAVE_SELECT)
2457/* Cause explanatory error message at compile time,
2458 since the select emulation is not good enough for X. */
2459int *x = &x_windows_lose_if_no_select_system_call;
2460#endif
2461
2462/* Emulate as much as select as is possible under 4.1 and needed by Gnu Emacs
2463 * Only checks read descriptors.
2464 */
2465/* How long to wait between checking fds in select */
2466#define SELECT_PAUSE 1
2467int select_alarmed;
2468
2469/* For longjmp'ing back to read_input_waiting. */
2470
2471jmp_buf read_alarm_throw;
2472
2473/* Nonzero if the alarm signal should throw back to read_input_waiting.
2474 The read_socket_hook function sets this to 1 while it is waiting. */
2475
2476int read_alarm_should_throw;
2477
2478SIGTYPE
2479select_alarm ()
2480{
2481 select_alarmed = 1;
2482#ifdef BSD4_1
2483 sigrelse (SIGALRM);
2484#else /* not BSD4_1 */
2485 signal (SIGALRM, SIG_IGN);
2486#endif /* not BSD4_1 */
2487 if (read_alarm_should_throw)
2488 longjmp (read_alarm_throw, 1);
2489}
2490
2491#ifndef WINDOWSNT
2492/* Only rfds are checked. */
2493int
2494sys_select (nfds, rfds, wfds, efds, timeout)
2495 int nfds;
2496 SELECT_TYPE *rfds, *wfds, *efds;
2497 EMACS_TIME *timeout;
2498{
2499 int ravail = 0;
2500 SELECT_TYPE orfds;
2501 int timeoutval;
2502 int *local_timeout;
2503 extern int proc_buffered_char[];
2504#ifndef subprocesses
2505 int process_tick = 0, update_tick = 0;
2506#else
2507 extern int process_tick, update_tick;
2508#endif
2509 unsigned char buf;
2510
2511#if defined (HAVE_SELECT) && defined (HAVE_X_WINDOWS)
2512 /* If we're using X, then the native select will work; we only need the
2513 emulation for non-X usage. */
2514 if (!NILP (Vwindow_system))
2515 return select (nfds, rfds, wfds, efds, timeout);
2516#endif
2517 timeoutval = timeout ? EMACS_SECS (*timeout) : 100000;
2518 local_timeout = &timeoutval;
2519 FD_ZERO (&orfds);
2520 if (rfds)
2521 {
2522 orfds = *rfds;
2523 FD_ZERO (rfds);
2524 }
2525 if (wfds)
2526 FD_ZERO (wfds);
2527 if (efds)
2528 FD_ZERO (efds);
2529
2530 /* If we are looking only for the terminal, with no timeout,
2531 just read it and wait -- that's more efficient. */
2532 if (*local_timeout == 100000 && process_tick == update_tick
2533 && FD_ISSET (0, &orfds))
2534 {
2535 int fd;
2536 for (fd = 1; fd < nfds; ++fd)
2537 if (FD_ISSET (fd, &orfds))
2538 goto hardway;
2539 if (! detect_input_pending ())
2540 read_input_waiting ();
2541 FD_SET (0, rfds);
2542 return 1;
2543 }
2544
2545 hardway:
2546 /* Once a second, till the timer expires, check all the flagged read
2547 * descriptors to see if any input is available. If there is some then
2548 * set the corresponding bit in the return copy of rfds.
2549 */
2550 while (1)
2551 {
2552 register int to_check, fd;
2553
2554 if (rfds)
2555 {
2556 for (to_check = nfds, fd = 0; --to_check >= 0; fd++)
2557 {
2558 if (FD_ISSET (fd, &orfds))
2559 {
2560 int avail = 0, status = 0;
2561
2562 if (fd == 0)
2563 avail = detect_input_pending (); /* Special keyboard handler */
2564 else
2565 {
2566#ifdef FIONREAD
2567 status = ioctl (fd, FIONREAD, &avail);
2568#else /* no FIONREAD */
2569 /* Hoping it will return -1 if nothing available
2570 or 0 if all 0 chars requested are read. */
2571 if (proc_buffered_char[fd] >= 0)
2572 avail = 1;
2573 else
2574 {
2575 avail = read (fd, &buf, 1);
2576 if (avail > 0)
2577 proc_buffered_char[fd] = buf;
2578 }
2579#endif /* no FIONREAD */
2580 }
2581 if (status >= 0 && avail > 0)
2582 {
2583 FD_SET (fd, rfds);
2584 ravail++;
2585 }
2586 }
2587 }
2588 }
2589 if (*local_timeout == 0 || ravail != 0 || process_tick != update_tick)
2590 break;
2591
2592 turn_on_atimers (0);
2593 signal (SIGALRM, select_alarm);
2594 select_alarmed = 0;
2595 alarm (SELECT_PAUSE);
2596
2597 /* Wait for a SIGALRM (or maybe a SIGTINT) */
2598 while (select_alarmed == 0 && *local_timeout != 0
2599 && process_tick == update_tick)
2600 {
2601 /* If we are interested in terminal input,
2602 wait by reading the terminal.
2603 That makes instant wakeup for terminal input at least. */
2604 if (FD_ISSET (0, &orfds))
2605 {
2606 read_input_waiting ();
2607 if (detect_input_pending ())
2608 select_alarmed = 1;
2609 }
2610 else
2611 pause ();
2612 }
2613 (*local_timeout) -= SELECT_PAUSE;
2614
2615 /* Reset the old alarm if there was one. */
2616 turn_on_atimers (1);
2617
2618 if (*local_timeout == 0) /* Stop on timer being cleared */
2619 break;
2620 }
2621 return ravail;
2622}
2623#endif /* not WINDOWSNT */
2624
2625/* Read keyboard input into the standard buffer,
2626 waiting for at least one character. */
2627
2628/* Make all keyboard buffers much bigger when using a window system. */
2629#ifdef HAVE_WINDOW_SYSTEM
2630#define BUFFER_SIZE_FACTOR 16
2631#else
2632#define BUFFER_SIZE_FACTOR 1
2633#endif
2634
2635void
2636read_input_waiting ()
2637{
2638 struct input_event e;
2639 int nread, i;
2640 extern int quit_char;
2641
2642 if (read_socket_hook)
2643 {
2644 struct input_event buf[256];
2645
2646 read_alarm_should_throw = 0;
2647 if (! setjmp (read_alarm_throw))
2648 nread = (*read_socket_hook) (0, buf, 256, 1);
2649 else
2650 nread = -1;
2651
2652 /* Scan the chars for C-g and store them in kbd_buffer. */
2653 for (i = 0; i < nread; i++)
2654 {
2655 kbd_buffer_store_event (&buf[i]);
2656 /* Don't look at input that follows a C-g too closely.
2657 This reduces lossage due to autorepeat on C-g. */
2658 if (buf[i].kind == ASCII_KEYSTROKE_EVENT
2659 && buf[i].code == quit_char)
2660 break;
2661 }
2662 }
2663 else
2664 {
2665 char buf[3];
2666 nread = read (fileno (stdin), buf, 1);
2667
2668 /* Scan the chars for C-g and store them in kbd_buffer. */
2669 e.kind = ASCII_KEYSTROKE_EVENT;
2670 e.frame_or_window = selected_frame;
2671 e.modifiers = 0;
2672 for (i = 0; i < nread; i++)
2673 {
2674 /* Convert chars > 0177 to meta events if desired.
2675 We do this under the same conditions that read_avail_input does. */
2676 if (read_socket_hook == 0)
2677 {
2678 /* If the user says she has a meta key, then believe her. */
2679 if (meta_key == 1 && (buf[i] & 0x80))
2680 e.modifiers = meta_modifier;
2681 if (meta_key != 2)
2682 buf[i] &= ~0x80;
2683 }
2684
2685 XSETINT (e.code, buf[i]);
2686 kbd_buffer_store_event (&e);
2687 /* Don't look at input that follows a C-g too closely.
2688 This reduces lossage due to autorepeat on C-g. */
2689 if (buf[i] == quit_char)
2690 break;
2691 }
2692 }
2693}
2694
2695#endif /* not HAVE_SELECT */
2696#endif /* not VMS */
2697#endif /* not MSDOS */
2698\f
2699#ifdef BSD4_1
2700void
2701init_sigio (fd)
2702 int fd;
2703{
2704 if (noninteractive)
2705 return;
2706 lmode = LINTRUP | lmode;
2707 ioctl (fd, TIOCLSET, &lmode);
2708}
2709
2710void
2711reset_sigio ()
2712{
2713 if (noninteractive)
2714 return;
2715 lmode = ~LINTRUP & lmode;
2716 ioctl (0, TIOCLSET, &lmode);
2717}
2718
2719void
2720request_sigio ()
2721{
2722 sigrelse (SIGTINT);
2723
2724 interrupts_deferred = 0;
2725}
2726
2727void
2728unrequest_sigio ()
2729{
2730 sighold (SIGTINT);
2731
2732 interrupts_deferred = 1;
2733}
2734
2735/* still inside #ifdef BSD4_1 */
2736#ifdef subprocesses
2737
2738int sigheld; /* Mask of held signals */
2739
2740void
2741sigholdx (signum)
2742 int signum;
2743{
2744 sigheld |= sigbit (signum);
2745 sighold (signum);
2746}
2747
2748void
2749sigisheld (signum)
2750 int signum;
2751{
2752 sigheld |= sigbit (signum);
2753}
2754
2755void
2756sigunhold (signum)
2757 int signum;
2758{
2759 sigheld &= ~sigbit (signum);
2760 sigrelse (signum);
2761}
2762
2763void
2764sigfree () /* Free all held signals */
2765{
2766 int i;
2767 for (i = 0; i < NSIG; i++)
2768 if (sigheld & sigbit (i))
2769 sigrelse (i);
2770 sigheld = 0;
2771}
2772
2773int
2774sigbit (i)
2775{
2776 return 1 << (i - 1);
2777}
2778#endif /* subprocesses */
2779#endif /* BSD4_1 */
2780\f
2781/* POSIX signals support - DJB */
2782/* Anyone with POSIX signals should have ANSI C declarations */
2783
2784#ifdef POSIX_SIGNALS
2785
2786sigset_t empty_mask, full_mask;
2787
2788signal_handler_t
2789sys_signal (int signal_number, signal_handler_t action)
2790{
2791 struct sigaction new_action, old_action;
2792 sigemptyset (&new_action.sa_mask);
2793 new_action.sa_handler = action;
2794#if defined (SA_RESTART) && ! defined (BROKEN_SA_RESTART)
2795 /* Emacs mostly works better with restartable system services. If this
2796 flag exists, we probably want to turn it on here.
2797 However, on some systems this resets the timeout of `select'
2798 which means that `select' never finishes if it keeps getting signals.
2799 BROKEN_SA_RESTART is defined on those systems. */
2800 new_action.sa_flags = SA_RESTART;
2801#else
2802 new_action.sa_flags = 0;
2803#endif
2804 sigaction (signal_number, &new_action, &old_action);
2805 return (old_action.sa_handler);
2806}
2807
2808#ifndef __GNUC__
2809/* If we're compiling with GCC, we don't need this function, since it
2810 can be written as a macro. */
2811sigset_t
2812sys_sigmask (int sig)
2813{
2814 sigset_t mask;
2815 sigemptyset (&mask);
2816 sigaddset (&mask, sig);
2817 return mask;
2818}
2819#endif
2820
2821/* I'd like to have these guys return pointers to the mask storage in here,
2822 but there'd be trouble if the code was saving multiple masks. I'll be
2823 safe and pass the structure. It normally won't be more than 2 bytes
2824 anyhow. - DJB */
2825
2826sigset_t
2827sys_sigblock (sigset_t new_mask)
2828{
2829 sigset_t old_mask;
2830 sigprocmask (SIG_BLOCK, &new_mask, &old_mask);
2831 return (old_mask);
2832}
2833
2834sigset_t
2835sys_sigunblock (sigset_t new_mask)
2836{
2837 sigset_t old_mask;
2838 sigprocmask (SIG_UNBLOCK, &new_mask, &old_mask);
2839 return (old_mask);
2840}
2841
2842sigset_t
2843sys_sigsetmask (sigset_t new_mask)
2844{
2845 sigset_t old_mask;
2846 sigprocmask (SIG_SETMASK, &new_mask, &old_mask);
2847 return (old_mask);
2848}
2849
2850#endif /* POSIX_SIGNALS */
2851\f
2852#if !defined HAVE_STRSIGNAL && !defined SYS_SIGLIST_DECLARED
2853static char *my_sys_siglist[NSIG];
2854# ifdef sys_siglist
2855# undef sys_siglist
2856# endif
2857# define sys_siglist my_sys_siglist
2858#endif
2859
2860void
2861init_signals ()
2862{
2863#ifdef POSIX_SIGNALS
2864 sigemptyset (&empty_mask);
2865 sigfillset (&full_mask);
2866#endif
2867
2868#if !defined HAVE_STRSIGNAL && !defined SYS_SIGLIST_DECLARED
2869 if (! initialized)
2870 {
2871# ifdef SIGABRT
2872 sys_siglist[SIGABRT] = "Aborted";
2873# endif
2874# ifdef SIGAIO
2875 sys_siglist[SIGAIO] = "LAN I/O interrupt";
2876# endif
2877# ifdef SIGALRM
2878 sys_siglist[SIGALRM] = "Alarm clock";
2879# endif
2880# ifdef SIGBUS
2881 sys_siglist[SIGBUS] = "Bus error";
2882# endif
2883# ifdef SIGCLD
2884 sys_siglist[SIGCLD] = "Child status changed";
2885# endif
2886# ifdef SIGCHLD
2887 sys_siglist[SIGCHLD] = "Child status changed";
2888# endif
2889# ifdef SIGCONT
2890 sys_siglist[SIGCONT] = "Continued";
2891# endif
2892# ifdef SIGDANGER
2893 sys_siglist[SIGDANGER] = "Swap space dangerously low";
2894# endif
2895# ifdef SIGDGNOTIFY
2896 sys_siglist[SIGDGNOTIFY] = "Notification message in queue";
2897# endif
2898# ifdef SIGEMT
2899 sys_siglist[SIGEMT] = "Emulation trap";
2900# endif
2901# ifdef SIGFPE
2902 sys_siglist[SIGFPE] = "Arithmetic exception";
2903# endif
2904# ifdef SIGFREEZE
2905 sys_siglist[SIGFREEZE] = "SIGFREEZE";
2906# endif
2907# ifdef SIGGRANT
2908 sys_siglist[SIGGRANT] = "Monitor mode granted";
2909# endif
2910# ifdef SIGHUP
2911 sys_siglist[SIGHUP] = "Hangup";
2912# endif
2913# ifdef SIGILL
2914 sys_siglist[SIGILL] = "Illegal instruction";
2915# endif
2916# ifdef SIGINT
2917 sys_siglist[SIGINT] = "Interrupt";
2918# endif
2919# ifdef SIGIO
2920 sys_siglist[SIGIO] = "I/O possible";
2921# endif
2922# ifdef SIGIOINT
2923 sys_siglist[SIGIOINT] = "I/O intervention required";
2924# endif
2925# ifdef SIGIOT
2926 sys_siglist[SIGIOT] = "IOT trap";
2927# endif
2928# ifdef SIGKILL
2929 sys_siglist[SIGKILL] = "Killed";
2930# endif
2931# ifdef SIGLOST
2932 sys_siglist[SIGLOST] = "Resource lost";
2933# endif
2934# ifdef SIGLWP
2935 sys_siglist[SIGLWP] = "SIGLWP";
2936# endif
2937# ifdef SIGMSG
2938 sys_siglist[SIGMSG] = "Monitor mode data available";
2939# endif
2940# ifdef SIGPHONE
2941 sys_siglist[SIGWIND] = "SIGPHONE";
2942# endif
2943# ifdef SIGPIPE
2944 sys_siglist[SIGPIPE] = "Broken pipe";
2945# endif
2946# ifdef SIGPOLL
2947 sys_siglist[SIGPOLL] = "Pollable event occurred";
2948# endif
2949# ifdef SIGPROF
2950 sys_siglist[SIGPROF] = "Profiling timer expired";
2951# endif
2952# ifdef SIGPTY
2953 sys_siglist[SIGPTY] = "PTY I/O interrupt";
2954# endif
2955# ifdef SIGPWR
2956 sys_siglist[SIGPWR] = "Power-fail restart";
2957# endif
2958# ifdef SIGQUIT
2959 sys_siglist[SIGQUIT] = "Quit";
2960# endif
2961# ifdef SIGRETRACT
2962 sys_siglist[SIGRETRACT] = "Need to relinguish monitor mode";
2963# endif
2964# ifdef SIGSAK
2965 sys_siglist[SIGSAK] = "Secure attention";
2966# endif
2967# ifdef SIGSEGV
2968 sys_siglist[SIGSEGV] = "Segmentation violation";
2969# endif
2970# ifdef SIGSOUND
2971 sys_siglist[SIGSOUND] = "Sound completed";
2972# endif
2973# ifdef SIGSTOP
2974 sys_siglist[SIGSTOP] = "Stopped (signal)";
2975# endif
2976# ifdef SIGSTP
2977 sys_siglist[SIGSTP] = "Stopped (user)";
2978# endif
2979# ifdef SIGSYS
2980 sys_siglist[SIGSYS] = "Bad argument to system call";
2981# endif
2982# ifdef SIGTERM
2983 sys_siglist[SIGTERM] = "Terminated";
2984# endif
2985# ifdef SIGTHAW
2986 sys_siglist[SIGTHAW] = "SIGTHAW";
2987# endif
2988# ifdef SIGTRAP
2989 sys_siglist[SIGTRAP] = "Trace/breakpoint trap";
2990# endif
2991# ifdef SIGTSTP
2992 sys_siglist[SIGTSTP] = "Stopped (user)";
2993# endif
2994# ifdef SIGTTIN
2995 sys_siglist[SIGTTIN] = "Stopped (tty input)";
2996# endif
2997# ifdef SIGTTOU
2998 sys_siglist[SIGTTOU] = "Stopped (tty output)";
2999# endif
3000# ifdef SIGURG
3001 sys_siglist[SIGURG] = "Urgent I/O condition";
3002# endif
3003# ifdef SIGUSR1
3004 sys_siglist[SIGUSR1] = "User defined signal 1";
3005# endif
3006# ifdef SIGUSR2
3007 sys_siglist[SIGUSR2] = "User defined signal 2";
3008# endif
3009# ifdef SIGVTALRM
3010 sys_siglist[SIGVTALRM] = "Virtual timer expired";
3011# endif
3012# ifdef SIGWAITING
3013 sys_siglist[SIGWAITING] = "Process's LWPs are blocked";
3014# endif
3015# ifdef SIGWINCH
3016 sys_siglist[SIGWINCH] = "Window size changed";
3017# endif
3018# ifdef SIGWIND
3019 sys_siglist[SIGWIND] = "SIGWIND";
3020# endif
3021# ifdef SIGXCPU
3022 sys_siglist[SIGXCPU] = "CPU time limit exceeded";
3023# endif
3024# ifdef SIGXFSZ
3025 sys_siglist[SIGXFSZ] = "File size limit exceeded";
3026# endif
3027 }
3028#endif /* !defined HAVE_STRSIGNAL && !defined SYS_SIGLIST_DECLARED */
3029}
3030\f
3031#ifndef HAVE_RANDOM
3032#ifdef random
3033#define HAVE_RANDOM
3034#endif
3035#endif
3036
3037/* Figure out how many bits the system's random number generator uses.
3038 `random' and `lrand48' are assumed to return 31 usable bits.
3039 BSD `rand' returns a 31 bit value but the low order bits are unusable;
3040 so we'll shift it and treat it like the 15-bit USG `rand'. */
3041
3042#ifndef RAND_BITS
3043# ifdef HAVE_RANDOM
3044# define RAND_BITS 31
3045# else /* !HAVE_RANDOM */
3046# ifdef HAVE_LRAND48
3047# define RAND_BITS 31
3048# define random lrand48
3049# else /* !HAVE_LRAND48 */
3050# define RAND_BITS 15
3051# if RAND_MAX == 32767
3052# define random rand
3053# else /* RAND_MAX != 32767 */
3054# if RAND_MAX == 2147483647
3055# define random() (rand () >> 16)
3056# else /* RAND_MAX != 2147483647 */
3057# ifdef USG
3058# define random rand
3059# else
3060# define random() (rand () >> 16)
3061# endif /* !USG */
3062# endif /* RAND_MAX != 2147483647 */
3063# endif /* RAND_MAX != 32767 */
3064# endif /* !HAVE_LRAND48 */
3065# endif /* !HAVE_RANDOM */
3066#endif /* !RAND_BITS */
3067
3068void
3069seed_random (arg)
3070 long arg;
3071{
3072#ifdef HAVE_RANDOM
3073 srandom ((unsigned int)arg);
3074#else
3075# ifdef HAVE_LRAND48
3076 srand48 (arg);
3077# else
3078 srand ((unsigned int)arg);
3079# endif
3080#endif
3081}
3082
3083/*
3084 * Build a full Emacs-sized word out of whatever we've got.
3085 * This suffices even for a 64-bit architecture with a 15-bit rand.
3086 */
3087long
3088get_random ()
3089{
3090 long val = random ();
3091#if VALBITS > RAND_BITS
3092 val = (val << RAND_BITS) ^ random ();
3093#if VALBITS > 2*RAND_BITS
3094 val = (val << RAND_BITS) ^ random ();
3095#if VALBITS > 3*RAND_BITS
3096 val = (val << RAND_BITS) ^ random ();
3097#if VALBITS > 4*RAND_BITS
3098 val = (val << RAND_BITS) ^ random ();
3099#endif /* need at least 5 */
3100#endif /* need at least 4 */
3101#endif /* need at least 3 */
3102#endif /* need at least 2 */
3103 return val & ((1L << VALBITS) - 1);
3104}
3105\f
3106#ifdef WRONG_NAME_INSQUE
3107
3108insque (q,p)
3109 caddr_t q,p;
3110{
3111 _insque (q,p);
3112}
3113
3114#endif
3115\f
3116#ifdef VMS
3117
3118#ifdef getenv
3119/* If any place else asks for the TERM variable,
3120 allow it to be overridden with the EMACS_TERM variable
3121 before attempting to translate the logical name TERM. As a last
3122 resort, ask for VAX C's special idea of the TERM variable. */
3123#undef getenv
3124char *
3125sys_getenv (name)
3126 char *name;
3127{
3128 register char *val;
3129 static char buf[256];
3130 static struct dsc$descriptor_s equiv
3131 = {sizeof (buf), DSC$K_DTYPE_T, DSC$K_CLASS_S, buf};
3132 static struct dsc$descriptor_s d_name
3133 = {0, DSC$K_DTYPE_T, DSC$K_CLASS_S, 0};
3134 short eqlen;
3135
3136 if (!strcmp (name, "TERM"))
3137 {
3138 val = (char *) getenv ("EMACS_TERM");
3139 if (val)
3140 return val;
3141 }
3142
3143 d_name.dsc$w_length = strlen (name);
3144 d_name.dsc$a_pointer = name;
3145 if (LIB$SYS_TRNLOG (&d_name, &eqlen, &equiv) == 1)
3146 {
3147 char *str = (char *) xmalloc (eqlen + 1);
3148 bcopy (buf, str, eqlen);
3149 str[eqlen] = '\0';
3150 /* This is a storage leak, but a pain to fix. With luck,
3151 no one will ever notice. */
3152 return str;
3153 }
3154 return (char *) getenv (name);
3155}
3156#endif /* getenv */
3157
3158#ifdef abort
3159/* Since VMS doesn't believe in core dumps, the only way to debug this beast is
3160 to force a call on the debugger from within the image. */
3161#undef abort
3162sys_abort ()
3163{
3164 reset_sys_modes ();
3165 LIB$SIGNAL (SS$_DEBUG);
3166}
3167#endif /* abort */
3168#endif /* VMS */
3169\f
3170#ifdef VMS
3171#ifdef LINK_CRTL_SHARE
3172#ifdef SHARABLE_LIB_BUG
3173/* Variables declared noshare and initialized in sharable libraries
3174 cannot be shared. The VMS linker incorrectly forces you to use a private
3175 version which is uninitialized... If not for this "feature", we
3176 could use the C library definition of sys_nerr and sys_errlist. */
3177int sys_nerr = 35;
3178char *sys_errlist[] =
3179 {
3180 "error 0",
3181 "not owner",
3182 "no such file or directory",
3183 "no such process",
3184 "interrupted system call",
3185 "i/o error",
3186 "no such device or address",
3187 "argument list too long",
3188 "exec format error",
3189 "bad file number",
3190 "no child process",
3191 "no more processes",
3192 "not enough memory",
3193 "permission denied",
3194 "bad address",
3195 "block device required",
3196 "mount devices busy",
3197 "file exists",
3198 "cross-device link",
3199 "no such device",
3200 "not a directory",
3201 "is a directory",
3202 "invalid argument",
3203 "file table overflow",
3204 "too many open files",
3205 "not a typewriter",
3206 "text file busy",
3207 "file too big",
3208 "no space left on device",
3209 "illegal seek",
3210 "read-only file system",
3211 "too many links",
3212 "broken pipe",
3213 "math argument",
3214 "result too large",
3215 "I/O stream empty",
3216 "vax/vms specific error code nontranslatable error"
3217 };
3218#endif /* SHARABLE_LIB_BUG */
3219#endif /* LINK_CRTL_SHARE */
3220#endif /* VMS */
3221
3222#ifndef HAVE_STRERROR
3223#ifndef WINDOWSNT
3224char *
3225strerror (errnum)
3226 int errnum;
3227{
3228 extern char *sys_errlist[];
3229 extern int sys_nerr;
3230
3231 if (errnum >= 0 && errnum < sys_nerr)
3232 return sys_errlist[errnum];
3233 return (char *) "Unknown error";
3234}
3235#endif /* not WINDOWSNT */
3236#endif /* ! HAVE_STRERROR */
3237\f
3238int
3239emacs_open (path, oflag, mode)
3240 const char *path;
3241 int oflag, mode;
3242{
3243 register int rtnval;
3244
3245#ifdef BSD4_1
3246 if (oflag & O_CREAT)
3247 return creat (path, mode);
3248#endif
3249
3250 while ((rtnval = open (path, oflag, mode)) == -1
3251 && (errno == EINTR));
3252 return (rtnval);
3253}
3254
3255int
3256emacs_close (fd)
3257 int fd;
3258{
3259 int did_retry = 0;
3260 register int rtnval;
3261
3262 while ((rtnval = close (fd)) == -1
3263 && (errno == EINTR))
3264 did_retry = 1;
3265
3266 /* If close is interrupted SunOS 4.1 may or may not have closed the
3267 file descriptor. If it did the second close will fail with
3268 errno = EBADF. That means we have succeeded. */
3269 if (rtnval == -1 && did_retry && errno == EBADF)
3270 return 0;
3271
3272 return rtnval;
3273}
3274
3275int
3276emacs_read (fildes, buf, nbyte)
3277 int fildes;
3278 char *buf;
3279 unsigned int nbyte;
3280{
3281 register int rtnval;
3282
3283 while ((rtnval = read (fildes, buf, nbyte)) == -1
3284 && (errno == EINTR));
3285 return (rtnval);
3286}
3287
3288int
3289emacs_write (fildes, buf, nbyte)
3290 int fildes;
3291 const char *buf;
3292 unsigned int nbyte;
3293{
3294 register int rtnval, bytes_written;
3295
3296 bytes_written = 0;
3297
3298 while (nbyte > 0)
3299 {
3300 rtnval = write (fildes, buf, nbyte);
3301
3302 if (rtnval == -1)
3303 {
3304 if (errno == EINTR)
3305 continue;
3306 else
3307 return (bytes_written ? bytes_written : -1);
3308 }
3309
3310 buf += rtnval;
3311 nbyte -= rtnval;
3312 bytes_written += rtnval;
3313 }
3314 return (bytes_written);
3315}
3316\f
3317#ifdef USG
3318/*
3319 * All of the following are for USG.
3320 *
3321 * On USG systems the system calls are INTERRUPTIBLE by signals
3322 * that the user program has elected to catch. Thus the system call
3323 * must be retried in these cases. To handle this without massive
3324 * changes in the source code, we remap the standard system call names
3325 * to names for our own functions in sysdep.c that do the system call
3326 * with retries. Actually, for portability reasons, it is good
3327 * programming practice, as this example shows, to limit all actual
3328 * system calls to a single occurrence in the source. Sure, this
3329 * adds an extra level of function call overhead but it is almost
3330 * always negligible. Fred Fish, Unisoft Systems Inc.
3331 */
3332
3333/*
3334 * Warning, this function may not duplicate 4.2 action properly
3335 * under error conditions.
3336 */
3337
3338#ifndef MAXPATHLEN
3339/* In 4.1, param.h fails to define this. */
3340#define MAXPATHLEN 1024
3341#endif
3342
3343#ifndef HAVE_GETWD
3344
3345char *
3346getwd (pathname)
3347 char *pathname;
3348{
3349 char *npath, *spath;
3350 extern char *getcwd ();
3351
3352 BLOCK_INPUT; /* getcwd uses malloc */
3353 spath = npath = getcwd ((char *) 0, MAXPATHLEN);
3354 if (spath == 0)
3355 {
3356 UNBLOCK_INPUT;
3357 return spath;
3358 }
3359 /* On Altos 3068, getcwd can return @hostname/dir, so discard
3360 up to first slash. Should be harmless on other systems. */
3361 while (*npath && *npath != '/')
3362 npath++;
3363 strcpy (pathname, npath);
3364 free (spath); /* getcwd uses malloc */
3365 UNBLOCK_INPUT;
3366 return pathname;
3367}
3368
3369#endif /* HAVE_GETWD */
3370
3371/*
3372 * Emulate rename using unlink/link. Note that this is
3373 * only partially correct. Also, doesn't enforce restriction
3374 * that files be of same type (regular->regular, dir->dir, etc).
3375 */
3376
3377#ifndef HAVE_RENAME
3378
3379rename (from, to)
3380 const char *from;
3381 const char *to;
3382{
3383 if (access (from, 0) == 0)
3384 {
3385 unlink (to);
3386 if (link (from, to) == 0)
3387 if (unlink (from) == 0)
3388 return (0);
3389 }
3390 return (-1);
3391}
3392
3393#endif
3394
3395
3396#ifdef HPUX
3397#ifndef HAVE_PERROR
3398
3399/* HPUX curses library references perror, but as far as we know
3400 it won't be called. Anyway this definition will do for now. */
3401
3402perror ()
3403{
3404}
3405
3406#endif /* not HAVE_PERROR */
3407#endif /* HPUX */
3408
3409#ifndef HAVE_DUP2
3410
3411/*
3412 * Emulate BSD dup2. First close newd if it already exists.
3413 * Then, attempt to dup oldd. If not successful, call dup2 recursively
3414 * until we are, then close the unsuccessful ones.
3415 */
3416
3417dup2 (oldd, newd)
3418 int oldd;
3419 int newd;
3420{
3421 register int fd, ret;
3422
3423 emacs_close (newd);
3424
3425#ifdef F_DUPFD
3426 return fcntl (oldd, F_DUPFD, newd);
3427#else
3428 fd = dup (old);
3429 if (fd == -1)
3430 return -1;
3431 if (fd == new)
3432 return new;
3433 ret = dup2 (old,new);
3434 emacs_close (fd);
3435 return ret;
3436#endif
3437}
3438
3439#endif /* not HAVE_DUP2 */
3440
3441/*
3442 * Gettimeofday. Simulate as much as possible. Only accurate
3443 * to nearest second. Emacs doesn't use tzp so ignore it for now.
3444 * Only needed when subprocesses are defined.
3445 */
3446
3447#ifdef subprocesses
3448#ifndef VMS
3449#ifndef HAVE_GETTIMEOFDAY
3450#ifdef HAVE_TIMEVAL
3451
3452/* ARGSUSED */
3453int
3454gettimeofday (tp, tzp)
3455 struct timeval *tp;
3456 struct timezone *tzp;
3457{
3458 extern long time ();
3459
3460 tp->tv_sec = time ((long *)0);
3461 tp->tv_usec = 0;
3462 if (tzp != 0)
3463 tzp->tz_minuteswest = -1;
3464 return 0;
3465}
3466
3467#endif
3468#endif
3469#endif
3470#endif /* subprocess && !HAVE_GETTIMEOFDAY && HAVE_TIMEVAL && !VMS */
3471
3472/*
3473 * This function will go away as soon as all the stubs fixed. (fnf)
3474 */
3475
3476void
3477croak (badfunc)
3478 char *badfunc;
3479{
3480 printf ("%s not yet implemented\r\n", badfunc);
3481 reset_sys_modes ();
3482 exit (1);
3483}
3484
3485#endif /* USG */
3486\f
3487/* Directory routines for systems that don't have them. */
3488
3489#ifdef SYSV_SYSTEM_DIR
3490
3491#include <dirent.h>
3492
3493#if defined (BROKEN_CLOSEDIR) || !defined (HAVE_CLOSEDIR)
3494
3495int
3496closedir (dirp)
3497 register DIR *dirp; /* stream from opendir */
3498{
3499 int rtnval;
3500
3501 rtnval = emacs_close (dirp->dd_fd);
3502
3503 /* Some systems (like Solaris) allocate the buffer and the DIR all
3504 in one block. Why in the world are we freeing this ourselves
3505 anyway? */
3506#if ! (defined (sun) && defined (USG5_4))
3507 xfree ((char *) dirp->dd_buf); /* directory block defined in <dirent.h> */
3508#endif
3509 xfree ((char *) dirp);
3510
3511 return rtnval;
3512}
3513#endif /* BROKEN_CLOSEDIR or not HAVE_CLOSEDIR */
3514#endif /* SYSV_SYSTEM_DIR */
3515
3516#ifdef NONSYSTEM_DIR_LIBRARY
3517
3518DIR *
3519opendir (filename)
3520 char *filename; /* name of directory */
3521{
3522 register DIR *dirp; /* -> malloc'ed storage */
3523 register int fd; /* file descriptor for read */
3524 struct stat sbuf; /* result of fstat */
3525
3526 fd = emacs_open (filename, O_RDONLY, 0);
3527 if (fd < 0)
3528 return 0;
3529
3530 BLOCK_INPUT;
3531 if (fstat (fd, &sbuf) < 0
3532 || (sbuf.st_mode & S_IFMT) != S_IFDIR
3533 || (dirp = (DIR *) xmalloc (sizeof (DIR))) == 0)
3534 {
3535 emacs_close (fd);
3536 UNBLOCK_INPUT;
3537 return 0; /* bad luck today */
3538 }
3539 UNBLOCK_INPUT;
3540
3541 dirp->dd_fd = fd;
3542 dirp->dd_loc = dirp->dd_size = 0; /* refill needed */
3543
3544 return dirp;
3545}
3546
3547void
3548closedir (dirp)
3549 register DIR *dirp; /* stream from opendir */
3550{
3551 emacs_close (dirp->dd_fd);
3552 xfree ((char *) dirp);
3553}
3554
3555
3556#ifndef VMS
3557#define DIRSIZ 14
3558struct olddir
3559 {
3560 ino_t od_ino; /* inode */
3561 char od_name[DIRSIZ]; /* filename */
3562 };
3563#endif /* not VMS */
3564
3565struct direct dir_static; /* simulated directory contents */
3566
3567/* ARGUSED */
3568struct direct *
3569readdir (dirp)
3570 register DIR *dirp; /* stream from opendir */
3571{
3572#ifndef VMS
3573 register struct olddir *dp; /* -> directory data */
3574#else /* VMS */
3575 register struct dir$_name *dp; /* -> directory data */
3576 register struct dir$_version *dv; /* -> version data */
3577#endif /* VMS */
3578
3579 for (; ;)
3580 {
3581 if (dirp->dd_loc >= dirp->dd_size)
3582 dirp->dd_loc = dirp->dd_size = 0;
3583
3584 if (dirp->dd_size == 0 /* refill buffer */
3585 && (dirp->dd_size = emacs_read (dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ)) <= 0)
3586 return 0;
3587
3588#ifndef VMS
3589 dp = (struct olddir *) &dirp->dd_buf[dirp->dd_loc];
3590 dirp->dd_loc += sizeof (struct olddir);
3591
3592 if (dp->od_ino != 0) /* not deleted entry */
3593 {
3594 dir_static.d_ino = dp->od_ino;
3595 strncpy (dir_static.d_name, dp->od_name, DIRSIZ);
3596 dir_static.d_name[DIRSIZ] = '\0';
3597 dir_static.d_namlen = strlen (dir_static.d_name);
3598 dir_static.d_reclen = sizeof (struct direct)
3599 - MAXNAMLEN + 3
3600 + dir_static.d_namlen - dir_static.d_namlen % 4;
3601 return &dir_static; /* -> simulated structure */
3602 }
3603#else /* VMS */
3604 dp = (struct dir$_name *) dirp->dd_buf;
3605 if (dirp->dd_loc == 0)
3606 dirp->dd_loc = (dp->dir$b_namecount&1) ? dp->dir$b_namecount + 1
3607 : dp->dir$b_namecount;
3608 dv = (struct dir$_version *)&dp->dir$t_name[dirp->dd_loc];
3609 dir_static.d_ino = dv->dir$w_fid_num;
3610 dir_static.d_namlen = dp->dir$b_namecount;
3611 dir_static.d_reclen = sizeof (struct direct)
3612 - MAXNAMLEN + 3
3613 + dir_static.d_namlen - dir_static.d_namlen % 4;
3614 strncpy (dir_static.d_name, dp->dir$t_name, dp->dir$b_namecount);
3615 dir_static.d_name[dir_static.d_namlen] = '\0';
3616 dirp->dd_loc = dirp->dd_size; /* only one record at a time */
3617 return &dir_static;
3618#endif /* VMS */
3619 }
3620}
3621
3622#ifdef VMS
3623/* readdirver is just like readdir except it returns all versions of a file
3624 as separate entries. */
3625
3626/* ARGUSED */
3627struct direct *
3628readdirver (dirp)
3629 register DIR *dirp; /* stream from opendir */
3630{
3631 register struct dir$_name *dp; /* -> directory data */
3632 register struct dir$_version *dv; /* -> version data */
3633
3634 if (dirp->dd_loc >= dirp->dd_size - sizeof (struct dir$_name))
3635 dirp->dd_loc = dirp->dd_size = 0;
3636
3637 if (dirp->dd_size == 0 /* refill buffer */
3638 && (dirp->dd_size = sys_read (dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ)) <= 0)
3639 return 0;
3640
3641 dp = (struct dir$_name *) dirp->dd_buf;
3642 if (dirp->dd_loc == 0)
3643 dirp->dd_loc = (dp->dir$b_namecount & 1) ? dp->dir$b_namecount + 1
3644 : dp->dir$b_namecount;
3645 dv = (struct dir$_version *) &dp->dir$t_name[dirp->dd_loc];
3646 strncpy (dir_static.d_name, dp->dir$t_name, dp->dir$b_namecount);
3647 sprintf (&dir_static.d_name[dp->dir$b_namecount], ";%d", dv->dir$w_version);
3648 dir_static.d_namlen = strlen (dir_static.d_name);
3649 dir_static.d_ino = dv->dir$w_fid_num;
3650 dir_static.d_reclen = sizeof (struct direct) - MAXNAMLEN + 3
3651 + dir_static.d_namlen - dir_static.d_namlen % 4;
3652 dirp->dd_loc = ((char *) (++dv) - dp->dir$t_name);
3653 return &dir_static;
3654}
3655
3656#endif /* VMS */
3657
3658#endif /* NONSYSTEM_DIR_LIBRARY */
3659
3660\f
3661int
3662set_file_times (filename, atime, mtime)
3663 const char *filename;
3664 EMACS_TIME atime, mtime;
3665{
3666#ifdef HAVE_UTIMES
3667 struct timeval tv[2];
3668 tv[0] = atime;
3669 tv[1] = mtime;
3670 return utimes (filename, tv);
3671#else /* not HAVE_UTIMES */
3672 struct utimbuf utb;
3673 utb.actime = EMACS_SECS (atime);
3674 utb.modtime = EMACS_SECS (mtime);
3675 return utime (filename, &utb);
3676#endif /* not HAVE_UTIMES */
3677}
3678\f
3679/* mkdir and rmdir functions, for systems which don't have them. */
3680
3681#ifndef HAVE_MKDIR
3682/*
3683 * Written by Robert Rother, Mariah Corporation, August 1985.
3684 *
3685 * If you want it, it's yours. All I ask in return is that if you
3686 * figure out how to do this in a Bourne Shell script you send me
3687 * a copy.
3688 * sdcsvax!rmr or rmr@uscd
3689 *
3690 * Severely hacked over by John Gilmore to make a 4.2BSD compatible
3691 * subroutine. 11Mar86; hoptoad!gnu
3692 *
3693 * Modified by rmtodd@uokmax 6-28-87 -- when making an already existing dir,
3694 * subroutine didn't return EEXIST. It does now.
3695 */
3696
3697/*
3698 * Make a directory.
3699 */
3700#ifdef MKDIR_PROTOTYPE
3701MKDIR_PROTOTYPE
3702#else
3703int
3704mkdir (dpath, dmode)
3705 char *dpath;
3706 int dmode;
3707#endif
3708{
3709 int cpid, status, fd;
3710 struct stat statbuf;
3711
3712 if (stat (dpath, &statbuf) == 0)
3713 {
3714 errno = EEXIST; /* Stat worked, so it already exists */
3715 return -1;
3716 }
3717
3718 /* If stat fails for a reason other than non-existence, return error */
3719 if (errno != ENOENT)
3720 return -1;
3721
3722 synch_process_alive = 1;
3723 switch (cpid = fork ())
3724 {
3725
3726 case -1: /* Error in fork */
3727 return (-1); /* Errno is set already */
3728
3729 case 0: /* Child process */
3730 /*
3731 * Cheap hack to set mode of new directory. Since this
3732 * child process is going away anyway, we zap its umask.
3733 * FIXME, this won't suffice to set SUID, SGID, etc. on this
3734 * directory. Does anybody care?
3735 */
3736 status = umask (0); /* Get current umask */
3737 status = umask (status | (0777 & ~dmode)); /* Set for mkdir */
3738 fd = emacs_open ("/dev/null", O_RDWR, 0);
3739 if (fd >= 0)
3740 {
3741 dup2 (fd, 0);
3742 dup2 (fd, 1);
3743 dup2 (fd, 2);
3744 }
3745 execl ("/bin/mkdir", "mkdir", dpath, (char *) 0);
3746 _exit (-1); /* Can't exec /bin/mkdir */
3747
3748 default: /* Parent process */
3749 wait_for_termination (cpid);
3750 }
3751
3752 if (synch_process_death != 0 || synch_process_retcode != 0)
3753 {
3754 errno = EIO; /* We don't know why, but */
3755 return -1; /* /bin/mkdir failed */
3756 }
3757
3758 return 0;
3759}
3760#endif /* not HAVE_MKDIR */
3761
3762#ifndef HAVE_RMDIR
3763int
3764rmdir (dpath)
3765 char *dpath;
3766{
3767 int cpid, status, fd;
3768 struct stat statbuf;
3769
3770 if (stat (dpath, &statbuf) != 0)
3771 {
3772 /* Stat just set errno. We don't have to */
3773 return -1;
3774 }
3775
3776 synch_process_alive = 1;
3777 switch (cpid = fork ())
3778 {
3779
3780 case -1: /* Error in fork */
3781 return (-1); /* Errno is set already */
3782
3783 case 0: /* Child process */
3784 fd = emacs_open ("/dev/null", O_RDWR, 0);
3785 if (fd >= 0)
3786 {
3787 dup2 (fd, 0);
3788 dup2 (fd, 1);
3789 dup2 (fd, 2);
3790 }
3791 execl ("/bin/rmdir", "rmdir", dpath, (char *) 0);
3792 _exit (-1); /* Can't exec /bin/rmdir */
3793
3794 default: /* Parent process */
3795 wait_for_termination (cpid);
3796 }
3797
3798 if (synch_process_death != 0 || synch_process_retcode != 0)
3799 {
3800 errno = EIO; /* We don't know why, but */
3801 return -1; /* /bin/rmdir failed */
3802 }
3803
3804 return 0;
3805}
3806#endif /* !HAVE_RMDIR */
3807
3808
3809\f
3810/* Functions for VMS */
3811#ifdef VMS
3812#include "vms-pwd.h"
3813#include <acldef.h>
3814#include <chpdef.h>
3815#include <jpidef.h>
3816
3817/* Return as a string the VMS error string pertaining to STATUS.
3818 Reuses the same static buffer each time it is called. */
3819
3820char *
3821vmserrstr (status)
3822 int status; /* VMS status code */
3823{
3824 int bufadr[2];
3825 short len;
3826 static char buf[257];
3827
3828 bufadr[0] = sizeof buf - 1;
3829 bufadr[1] = (int) buf;
3830 if (! (SYS$GETMSG (status, &len, bufadr, 0x1, 0) & 1))
3831 return "untranslatable VMS error status";
3832 buf[len] = '\0';
3833 return buf;
3834}
3835
3836#ifdef access
3837#undef access
3838
3839/* The following is necessary because 'access' emulation by VMS C (2.0) does
3840 * not work correctly. (It also doesn't work well in version 2.3.)
3841 */
3842
3843#ifdef VMS4_4
3844
3845#define DESCRIPTOR(name,string) struct dsc$descriptor_s name = \
3846 { strlen (string), DSC$K_DTYPE_T, DSC$K_CLASS_S, string }
3847
3848typedef union {
3849 struct {
3850 unsigned short s_buflen;
3851 unsigned short s_code;
3852 char *s_bufadr;
3853 unsigned short *s_retlenadr;
3854 } s;
3855 int end;
3856} item;
3857#define buflen s.s_buflen
3858#define code s.s_code
3859#define bufadr s.s_bufadr
3860#define retlenadr s.s_retlenadr
3861
3862#define R_OK 4 /* test for read permission */
3863#define W_OK 2 /* test for write permission */
3864#define X_OK 1 /* test for execute (search) permission */
3865#define F_OK 0 /* test for presence of file */
3866
3867int
3868sys_access (path, mode)
3869 char *path;
3870 int mode;
3871{
3872 static char *user = NULL;
3873 char dir_fn[512];
3874
3875 /* translate possible directory spec into .DIR file name, so brain-dead
3876 * access can treat the directory like a file. */
3877 if (directory_file_name (path, dir_fn))
3878 path = dir_fn;
3879
3880 if (mode == F_OK)
3881 return access (path, mode);
3882 if (user == NULL && (user = (char *) getenv ("USER")) == NULL)
3883 return -1;
3884 {
3885 int stat;
3886 int flags;
3887 int acces;
3888 unsigned short int dummy;
3889 item itemlst[3];
3890 static int constant = ACL$C_FILE;
3891 DESCRIPTOR (path_desc, path);
3892 DESCRIPTOR (user_desc, user);
3893
3894 flags = 0;
3895 acces = 0;
3896 if ((mode & X_OK) && ((stat = access (path, mode)) < 0 || mode == X_OK))
3897 return stat;
3898 if (mode & R_OK)
3899 acces |= CHP$M_READ;
3900 if (mode & W_OK)
3901 acces |= CHP$M_WRITE;
3902 itemlst[0].buflen = sizeof (int);
3903 itemlst[0].code = CHP$_FLAGS;
3904 itemlst[0].bufadr = (char *) &flags;
3905 itemlst[0].retlenadr = &dummy;
3906 itemlst[1].buflen = sizeof (int);
3907 itemlst[1].code = CHP$_ACCESS;
3908 itemlst[1].bufadr = (char *) &acces;
3909 itemlst[1].retlenadr = &dummy;
3910 itemlst[2].end = CHP$_END;
3911 stat = SYS$CHECK_ACCESS (&constant, &path_desc, &user_desc, itemlst);
3912 return stat == SS$_NORMAL ? 0 : -1;
3913 }
3914}
3915
3916#else /* not VMS4_4 */
3917
3918#include <prvdef.h>
3919#define ACE$M_WRITE 2
3920#define ACE$C_KEYID 1
3921
3922static unsigned short memid, grpid;
3923static unsigned int uic;
3924
3925/* Called from init_sys_modes, so it happens not very often
3926 but at least each time Emacs is loaded. */
3927void
3928sys_access_reinit ()
3929{
3930 uic = 0;
3931}
3932
3933int
3934sys_access (filename, type)
3935 char * filename;
3936 int type;
3937{
3938 struct FAB fab;
3939 struct XABPRO xab;
3940 int status, size, i, typecode, acl_controlled;
3941 unsigned int *aclptr, *aclend, aclbuf[60];
3942 union prvdef prvmask;
3943
3944 /* Get UIC and GRP values for protection checking. */
3945 if (uic == 0)
3946 {
3947 status = LIB$GETJPI (&JPI$_UIC, 0, 0, &uic, 0, 0);
3948 if (! (status & 1))
3949 return -1;
3950 memid = uic & 0xFFFF;
3951 grpid = uic >> 16;
3952 }
3953
3954 if (type != 2) /* not checking write access */
3955 return access (filename, type);
3956
3957 /* Check write protection. */
3958
3959#define CHECKPRIV(bit) (prvmask.bit)
3960#define WRITABLE(field) (! ((xab.xab$w_pro >> field) & XAB$M_NOWRITE))
3961
3962 /* Find privilege bits */
3963 status = SYS$SETPRV (0, 0, 0, prvmask);
3964 if (! (status & 1))
3965 error ("Unable to find privileges: %s", vmserrstr (status));
3966 if (CHECKPRIV (PRV$V_BYPASS))
3967 return 0; /* BYPASS enabled */
3968 fab = cc$rms_fab;
3969 fab.fab$b_fac = FAB$M_GET;
3970 fab.fab$l_fna = filename;
3971 fab.fab$b_fns = strlen (filename);
3972 fab.fab$l_xab = &xab;
3973 xab = cc$rms_xabpro;
3974 xab.xab$l_aclbuf = aclbuf;
3975 xab.xab$w_aclsiz = sizeof (aclbuf);
3976 status = SYS$OPEN (&fab, 0, 0);
3977 if (! (status & 1))
3978 return -1;
3979 SYS$CLOSE (&fab, 0, 0);
3980 /* Check system access */
3981 if (CHECKPRIV (PRV$V_SYSPRV) && WRITABLE (XAB$V_SYS))
3982 return 0;
3983 /* Check ACL entries, if any */
3984 acl_controlled = 0;
3985 if (xab.xab$w_acllen > 0)
3986 {
3987 aclptr = aclbuf;
3988 aclend = &aclbuf[xab.xab$w_acllen / 4];
3989 while (*aclptr && aclptr < aclend)
3990 {
3991 size = (*aclptr & 0xff) / 4;
3992 typecode = (*aclptr >> 8) & 0xff;
3993 if (typecode == ACE$C_KEYID)
3994 for (i = size - 1; i > 1; i--)
3995 if (aclptr[i] == uic)
3996 {
3997 acl_controlled = 1;
3998 if (aclptr[1] & ACE$M_WRITE)
3999 return 0; /* Write access through ACL */
4000 }
4001 aclptr = &aclptr[size];
4002 }
4003 if (acl_controlled) /* ACL specified, prohibits write access */
4004 return -1;
4005 }
4006 /* No ACL entries specified, check normal protection */
4007 if (WRITABLE (XAB$V_WLD)) /* World writable */
4008 return 0;
4009 if (WRITABLE (XAB$V_GRP) &&
4010 (unsigned short) (xab.xab$l_uic >> 16) == grpid)
4011 return 0; /* Group writable */
4012 if (WRITABLE (XAB$V_OWN) &&
4013 (xab.xab$l_uic & 0xFFFF) == memid)
4014 return 0; /* Owner writable */
4015
4016 return -1; /* Not writable */
4017}
4018#endif /* not VMS4_4 */
4019#endif /* access */
4020
4021static char vtbuf[NAM$C_MAXRSS+1];
4022
4023/* translate a vms file spec to a unix path */
4024char *
4025sys_translate_vms (vfile)
4026 char * vfile;
4027{
4028 char * p;
4029 char * targ;
4030
4031 if (!vfile)
4032 return 0;
4033
4034 targ = vtbuf;
4035
4036 /* leading device or logical name is a root directory */
4037 if (p = strchr (vfile, ':'))
4038 {
4039 *targ++ = '/';
4040 while (vfile < p)
4041 *targ++ = *vfile++;
4042 vfile++;
4043 *targ++ = '/';
4044 }
4045 p = vfile;
4046 if (*p == '[' || *p == '<')
4047 {
4048 while (*++vfile != *p + 2)
4049 switch (*vfile)
4050 {
4051 case '.':
4052 if (vfile[-1] == *p)
4053 *targ++ = '.';
4054 *targ++ = '/';
4055 break;
4056
4057 case '-':
4058 *targ++ = '.';
4059 *targ++ = '.';
4060 break;
4061
4062 default:
4063 *targ++ = *vfile;
4064 break;
4065 }
4066 vfile++;
4067 *targ++ = '/';
4068 }
4069 while (*vfile)
4070 *targ++ = *vfile++;
4071
4072 return vtbuf;
4073}
4074
4075static char utbuf[NAM$C_MAXRSS+1];
4076
4077/* translate a unix path to a VMS file spec */
4078char *
4079sys_translate_unix (ufile)
4080 char * ufile;
4081{
4082 int slash_seen = 0;
4083 char *p;
4084 char * targ;
4085
4086 if (!ufile)
4087 return 0;
4088
4089 targ = utbuf;
4090
4091 if (*ufile == '/')
4092 {
4093 ufile++;
4094 }
4095
4096 while (*ufile)
4097 {
4098 switch (*ufile)
4099 {
4100 case '/':
4101 if (slash_seen)
4102 if (index (&ufile[1], '/'))
4103 *targ++ = '.';
4104 else
4105 *targ++ = ']';
4106 else
4107 {
4108 *targ++ = ':';
4109 if (index (&ufile[1], '/'))
4110 *targ++ = '[';
4111 slash_seen = 1;
4112 }
4113 break;
4114
4115 case '.':
4116 if (strncmp (ufile, "./", 2) == 0)
4117 {
4118 if (!slash_seen)
4119 {
4120 *targ++ = '[';
4121 slash_seen = 1;
4122 }
4123 ufile++; /* skip the dot */
4124 if (index (&ufile[1], '/'))
4125 *targ++ = '.';
4126 else
4127 *targ++ = ']';
4128 }
4129 else if (strncmp (ufile, "../", 3) == 0)
4130 {
4131 if (!slash_seen)
4132 {
4133 *targ++ = '[';
4134 slash_seen = 1;
4135 }
4136 *targ++ = '-';
4137 ufile += 2; /* skip the dots */
4138 if (index (&ufile[1], '/'))
4139 *targ++ = '.';
4140 else
4141 *targ++ = ']';
4142 }
4143 else
4144 *targ++ = *ufile;
4145 break;
4146
4147 default:
4148 *targ++ = *ufile;
4149 break;
4150 }
4151 ufile++;
4152 }
4153 *targ = '\0';
4154
4155 return utbuf;
4156}
4157
4158char *
4159getwd (pathname)
4160 char *pathname;
4161{
4162 char *ptr, *val;
4163 extern char *getcwd ();
4164
4165#define MAXPATHLEN 1024
4166
4167 ptr = xmalloc (MAXPATHLEN);
4168 val = getcwd (ptr, MAXPATHLEN);
4169 if (val == 0)
4170 {
4171 xfree (ptr);
4172 return val;
4173 }
4174 strcpy (pathname, ptr);
4175 xfree (ptr);
4176
4177 return pathname;
4178}
4179
4180int
4181getppid ()
4182{
4183 long item_code = JPI$_OWNER;
4184 unsigned long parent_id;
4185 int status;
4186
4187 if (((status = LIB$GETJPI (&item_code, 0, 0, &parent_id)) & 1) == 0)
4188 {
4189 errno = EVMSERR;
4190 vaxc$errno = status;
4191 return -1;
4192 }
4193 return parent_id;
4194}
4195
4196#undef getuid
4197unsigned
4198sys_getuid ()
4199{
4200 return (getgid () << 16) | getuid ();
4201}
4202
4203#undef read
4204int
4205sys_read (fildes, buf, nbyte)
4206 int fildes;
4207 char *buf;
4208 unsigned int nbyte;
4209{
4210 return read (fildes, buf, (nbyte < MAXIOSIZE ? nbyte : MAXIOSIZE));
4211}
4212
4213#if 0
4214int
4215sys_write (fildes, buf, nbyte)
4216 int fildes;
4217 char *buf;
4218 unsigned int nbyte;
4219{
4220 register int nwrote, rtnval = 0;
4221
4222 while (nbyte > MAXIOSIZE && (nwrote = write (fildes, buf, MAXIOSIZE)) > 0) {
4223 nbyte -= nwrote;
4224 buf += nwrote;
4225 rtnval += nwrote;
4226 }
4227 if (nwrote < 0)
4228 return rtnval ? rtnval : -1;
4229 if ((nwrote = write (fildes, buf, nbyte)) < 0)
4230 return rtnval ? rtnval : -1;
4231 return (rtnval + nwrote);
4232}
4233#endif /* 0 */
4234
4235/*
4236 * VAX/VMS VAX C RTL really loses. It insists that records
4237 * end with a newline (carriage return) character, and if they
4238 * don't it adds one (nice of it isn't it!)
4239 *
4240 * Thus we do this stupidity below.
4241 */
4242
4243#undef write
4244int
4245sys_write (fildes, buf, nbytes)
4246 int fildes;
4247 char *buf;
4248 unsigned int nbytes;
4249{
4250 register char *p;
4251 register char *e;
4252 int sum = 0;
4253 struct stat st;
4254
4255 fstat (fildes, &st);
4256 p = buf;
4257 while (nbytes > 0)
4258 {
4259 int len, retval;
4260
4261 /* Handle fixed-length files with carriage control. */
4262 if (st.st_fab_rfm == FAB$C_FIX
4263 && ((st.st_fab_rat & (FAB$M_FTN | FAB$M_CR)) != 0))
4264 {
4265 len = st.st_fab_mrs;
4266 retval = write (fildes, p, min (len, nbytes));
4267 if (retval != len)
4268 return -1;
4269 retval++; /* This skips the implied carriage control */
4270 }
4271 else
4272 {
4273 e = p + min (MAXIOSIZE, nbytes) - 1;
4274 while (*e != '\n' && e > p) e--;
4275 if (p == e) /* Ok.. so here we add a newline... sigh. */
4276 e = p + min (MAXIOSIZE, nbytes) - 1;
4277 len = e + 1 - p;
4278 retval = write (fildes, p, len);
4279 if (retval != len)
4280 return -1;
4281 }
4282 p += retval;
4283 sum += retval;
4284 nbytes -= retval;
4285 }
4286 return sum;
4287}
4288
4289/* Create file NEW copying its attributes from file OLD. If
4290 OLD is 0 or does not exist, create based on the value of
4291 vms_stmlf_recfm. */
4292
4293/* Protection value the file should ultimately have.
4294 Set by create_copy_attrs, and use by rename_sansversions. */
4295static unsigned short int fab_final_pro;
4296
4297int
4298creat_copy_attrs (old, new)
4299 char *old, *new;
4300{
4301 struct FAB fab = cc$rms_fab;
4302 struct XABPRO xabpro;
4303 char aclbuf[256]; /* Choice of size is arbitrary. See below. */
4304 extern int vms_stmlf_recfm;
4305
4306 if (old)
4307 {
4308 fab.fab$b_fac = FAB$M_GET;
4309 fab.fab$l_fna = old;
4310 fab.fab$b_fns = strlen (old);
4311 fab.fab$l_xab = (char *) &xabpro;
4312 xabpro = cc$rms_xabpro;
4313 xabpro.xab$l_aclbuf = aclbuf;
4314 xabpro.xab$w_aclsiz = sizeof aclbuf;
4315 /* Call $OPEN to fill in the fab & xabpro fields. */
4316 if (SYS$OPEN (&fab, 0, 0) & 1)
4317 {
4318 SYS$CLOSE (&fab, 0, 0);
4319 fab.fab$l_alq = 0; /* zero the allocation quantity */
4320 if (xabpro.xab$w_acllen > 0)
4321 {
4322 if (xabpro.xab$w_acllen > sizeof aclbuf)
4323 /* If the acl buffer was too short, redo open with longer one.
4324 Wouldn't need to do this if there were some system imposed
4325 limit on the size of an ACL, but I can't find any such. */
4326 {
4327 xabpro.xab$l_aclbuf = (char *) alloca (xabpro.xab$w_acllen);
4328 xabpro.xab$w_aclsiz = xabpro.xab$w_acllen;
4329 if (SYS$OPEN (&fab, 0, 0) & 1)
4330 SYS$CLOSE (&fab, 0, 0);
4331 else
4332 old = 0;
4333 }
4334 }
4335 else
4336 xabpro.xab$l_aclbuf = 0;
4337 }
4338 else
4339 old = 0;
4340 }
4341 fab.fab$l_fna = new;
4342 fab.fab$b_fns = strlen (new);
4343 if (!old)
4344 {
4345 fab.fab$l_xab = 0;
4346 fab.fab$b_rfm = vms_stmlf_recfm ? FAB$C_STMLF : FAB$C_VAR;
4347 fab.fab$b_rat = FAB$M_CR;
4348 }
4349
4350 /* Set the file protections such that we will be able to manipulate
4351 this file. Once we are done writing and renaming it, we will set
4352 the protections back. */
4353 if (old)
4354 fab_final_pro = xabpro.xab$w_pro;
4355 else
4356 SYS$SETDFPROT (0, &fab_final_pro);
4357 xabpro.xab$w_pro &= 0xff0f; /* set O:rewd for now. This is set back later. */
4358
4359 /* Create the new file with either default attrs or attrs copied
4360 from old file. */
4361 if (!(SYS$CREATE (&fab, 0, 0) & 1))
4362 return -1;
4363 SYS$CLOSE (&fab, 0, 0);
4364 /* As this is a "replacement" for creat, return a file descriptor
4365 opened for writing. */
4366 return open (new, O_WRONLY);
4367}
4368
4369#ifdef creat
4370#undef creat
4371#include <varargs.h>
4372#ifdef __GNUC__
4373#ifndef va_count
4374#define va_count(X) ((X) = *(((int *) &(va_alist)) - 1))
4375#endif
4376#endif
4377
4378int
4379sys_creat (va_alist)
4380 va_dcl
4381{
4382 va_list list_incrementer;
4383 char *name;
4384 int mode;
4385 int rfd; /* related file descriptor */
4386 int fd; /* Our new file descriptor */
4387 int count;
4388 struct stat st_buf;
4389 char rfm[12];
4390 char rat[15];
4391 char mrs[13];
4392 char fsz[13];
4393 extern int vms_stmlf_recfm;
4394
4395 va_count (count);
4396 va_start (list_incrementer);
4397 name = va_arg (list_incrementer, char *);
4398 mode = va_arg (list_incrementer, int);
4399 if (count > 2)
4400 rfd = va_arg (list_incrementer, int);
4401 va_end (list_incrementer);
4402 if (count > 2)
4403 {
4404 /* Use information from the related file descriptor to set record
4405 format of the newly created file. */
4406 fstat (rfd, &st_buf);
4407 switch (st_buf.st_fab_rfm)
4408 {
4409 case FAB$C_FIX:
4410 strcpy (rfm, "rfm = fix");
4411 sprintf (mrs, "mrs = %d", st_buf.st_fab_mrs);
4412 strcpy (rat, "rat = ");
4413 if (st_buf.st_fab_rat & FAB$M_CR)
4414 strcat (rat, "cr");
4415 else if (st_buf.st_fab_rat & FAB$M_FTN)
4416 strcat (rat, "ftn");
4417 else if (st_buf.st_fab_rat & FAB$M_PRN)
4418 strcat (rat, "prn");
4419 if (st_buf.st_fab_rat & FAB$M_BLK)
4420 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4421 strcat (rat, ", blk");
4422 else
4423 strcat (rat, "blk");
4424 return creat (name, 0, rfm, rat, mrs);
4425
4426 case FAB$C_VFC:
4427 strcpy (rfm, "rfm = vfc");
4428 sprintf (fsz, "fsz = %d", st_buf.st_fab_fsz);
4429 strcpy (rat, "rat = ");
4430 if (st_buf.st_fab_rat & FAB$M_CR)
4431 strcat (rat, "cr");
4432 else if (st_buf.st_fab_rat & FAB$M_FTN)
4433 strcat (rat, "ftn");
4434 else if (st_buf.st_fab_rat & FAB$M_PRN)
4435 strcat (rat, "prn");
4436 if (st_buf.st_fab_rat & FAB$M_BLK)
4437 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4438 strcat (rat, ", blk");
4439 else
4440 strcat (rat, "blk");
4441 return creat (name, 0, rfm, rat, fsz);
4442
4443 case FAB$C_STM:
4444 strcpy (rfm, "rfm = stm");
4445 break;
4446
4447 case FAB$C_STMCR:
4448 strcpy (rfm, "rfm = stmcr");
4449 break;
4450
4451 case FAB$C_STMLF:
4452 strcpy (rfm, "rfm = stmlf");
4453 break;
4454
4455 case FAB$C_UDF:
4456 strcpy (rfm, "rfm = udf");
4457 break;
4458
4459 case FAB$C_VAR:
4460 strcpy (rfm, "rfm = var");
4461 break;
4462 }
4463 strcpy (rat, "rat = ");
4464 if (st_buf.st_fab_rat & FAB$M_CR)
4465 strcat (rat, "cr");
4466 else if (st_buf.st_fab_rat & FAB$M_FTN)
4467 strcat (rat, "ftn");
4468 else if (st_buf.st_fab_rat & FAB$M_PRN)
4469 strcat (rat, "prn");
4470 if (st_buf.st_fab_rat & FAB$M_BLK)
4471 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4472 strcat (rat, ", blk");
4473 else
4474 strcat (rat, "blk");
4475 }
4476 else
4477 {
4478 strcpy (rfm, vms_stmlf_recfm ? "rfm = stmlf" : "rfm=var");
4479 strcpy (rat, "rat=cr");
4480 }
4481 /* Until the VAX C RTL fixes the many bugs with modes, always use
4482 mode 0 to get the user's default protection. */
4483 fd = creat (name, 0, rfm, rat);
4484 if (fd < 0 && errno == EEXIST)
4485 {
4486 if (unlink (name) < 0)
4487 report_file_error ("delete", build_string (name));
4488 fd = creat (name, 0, rfm, rat);
4489 }
4490 return fd;
4491}
4492#endif /* creat */
4493
4494/* fwrite to stdout is S L O W. Speed it up by using fputc...*/
4495int
4496sys_fwrite (ptr, size, num, fp)
4497 register char * ptr;
4498 FILE * fp;
4499{
4500 register int tot = num * size;
4501
4502 while (tot--)
4503 fputc (*ptr++, fp);
4504 return num;
4505}
4506
4507/*
4508 * The VMS C library routine creat actually creates a new version of an
4509 * existing file rather than truncating the old version. There are times
4510 * when this is not the desired behavior, for instance, when writing an
4511 * auto save file (you only want one version), or when you don't have
4512 * write permission in the directory containing the file (but the file
4513 * itself is writable). Hence this routine, which is equivalent to
4514 * "close (creat (fn, 0));" on Unix if fn already exists.
4515 */
4516int
4517vms_truncate (fn)
4518 char *fn;
4519{
4520 struct FAB xfab = cc$rms_fab;
4521 struct RAB xrab = cc$rms_rab;
4522 int status;
4523
4524 xfab.fab$l_fop = FAB$M_TEF; /* free allocated but unused blocks on close */
4525 xfab.fab$b_fac = FAB$M_TRN | FAB$M_GET; /* allow truncate and get access */
4526 xfab.fab$b_shr = FAB$M_NIL; /* allow no sharing - file must be locked */
4527 xfab.fab$l_fna = fn;
4528 xfab.fab$b_fns = strlen (fn);
4529 xfab.fab$l_dna = ";0"; /* default to latest version of the file */
4530 xfab.fab$b_dns = 2;
4531 xrab.rab$l_fab = &xfab;
4532
4533 /* This gibberish opens the file, positions to the first record, and
4534 deletes all records from there until the end of file. */
4535 if ((SYS$OPEN (&xfab) & 01) == 01)
4536 {
4537 if ((SYS$CONNECT (&xrab) & 01) == 01 &&
4538 (SYS$FIND (&xrab) & 01) == 01 &&
4539 (SYS$TRUNCATE (&xrab) & 01) == 01)
4540 status = 0;
4541 else
4542 status = -1;
4543 }
4544 else
4545 status = -1;
4546 SYS$CLOSE (&xfab);
4547 return status;
4548}
4549
4550/* Define this symbol to actually read SYSUAF.DAT. This requires either
4551 SYSPRV or a readable SYSUAF.DAT. */
4552
4553#ifdef READ_SYSUAF
4554/*
4555 * getuaf.c
4556 *
4557 * Routine to read the VMS User Authorization File and return
4558 * a specific user's record.
4559 */
4560
4561static struct UAF retuaf;
4562
4563struct UAF *
4564get_uaf_name (uname)
4565 char * uname;
4566{
4567 register status;
4568 struct FAB uaf_fab;
4569 struct RAB uaf_rab;
4570
4571 uaf_fab = cc$rms_fab;
4572 uaf_rab = cc$rms_rab;
4573 /* initialize fab fields */
4574 uaf_fab.fab$l_fna = "SYS$SYSTEM:SYSUAF.DAT";
4575 uaf_fab.fab$b_fns = 21;
4576 uaf_fab.fab$b_fac = FAB$M_GET;
4577 uaf_fab.fab$b_org = FAB$C_IDX;
4578 uaf_fab.fab$b_shr = FAB$M_GET|FAB$M_PUT|FAB$M_UPD|FAB$M_DEL;
4579 /* initialize rab fields */
4580 uaf_rab.rab$l_fab = &uaf_fab;
4581 /* open the User Authorization File */
4582 status = SYS$OPEN (&uaf_fab);
4583 if (!(status&1))
4584 {
4585 errno = EVMSERR;
4586 vaxc$errno = status;
4587 return 0;
4588 }
4589 status = SYS$CONNECT (&uaf_rab);
4590 if (!(status&1))
4591 {
4592 errno = EVMSERR;
4593 vaxc$errno = status;
4594 return 0;
4595 }
4596 /* read the requested record - index is in uname */
4597 uaf_rab.rab$l_kbf = uname;
4598 uaf_rab.rab$b_ksz = strlen (uname);
4599 uaf_rab.rab$b_rac = RAB$C_KEY;
4600 uaf_rab.rab$l_ubf = (char *)&retuaf;
4601 uaf_rab.rab$w_usz = sizeof retuaf;
4602 status = SYS$GET (&uaf_rab);
4603 if (!(status&1))
4604 {
4605 errno = EVMSERR;
4606 vaxc$errno = status;
4607 return 0;
4608 }
4609 /* close the User Authorization File */
4610 status = SYS$DISCONNECT (&uaf_rab);
4611 if (!(status&1))
4612 {
4613 errno = EVMSERR;
4614 vaxc$errno = status;
4615 return 0;
4616 }
4617 status = SYS$CLOSE (&uaf_fab);
4618 if (!(status&1))
4619 {
4620 errno = EVMSERR;
4621 vaxc$errno = status;
4622 return 0;
4623 }
4624 return &retuaf;
4625}
4626
4627struct UAF *
4628get_uaf_uic (uic)
4629 unsigned long uic;
4630{
4631 register status;
4632 struct FAB uaf_fab;
4633 struct RAB uaf_rab;
4634
4635 uaf_fab = cc$rms_fab;
4636 uaf_rab = cc$rms_rab;
4637 /* initialize fab fields */
4638 uaf_fab.fab$l_fna = "SYS$SYSTEM:SYSUAF.DAT";
4639 uaf_fab.fab$b_fns = 21;
4640 uaf_fab.fab$b_fac = FAB$M_GET;
4641 uaf_fab.fab$b_org = FAB$C_IDX;
4642 uaf_fab.fab$b_shr = FAB$M_GET|FAB$M_PUT|FAB$M_UPD|FAB$M_DEL;
4643 /* initialize rab fields */
4644 uaf_rab.rab$l_fab = &uaf_fab;
4645 /* open the User Authorization File */
4646 status = SYS$OPEN (&uaf_fab);
4647 if (!(status&1))
4648 {
4649 errno = EVMSERR;
4650 vaxc$errno = status;
4651 return 0;
4652 }
4653 status = SYS$CONNECT (&uaf_rab);
4654 if (!(status&1))
4655 {
4656 errno = EVMSERR;
4657 vaxc$errno = status;
4658 return 0;
4659 }
4660 /* read the requested record - index is in uic */
4661 uaf_rab.rab$b_krf = 1; /* 1st alternate key */
4662 uaf_rab.rab$l_kbf = (char *) &uic;
4663 uaf_rab.rab$b_ksz = sizeof uic;
4664 uaf_rab.rab$b_rac = RAB$C_KEY;
4665 uaf_rab.rab$l_ubf = (char *)&retuaf;
4666 uaf_rab.rab$w_usz = sizeof retuaf;
4667 status = SYS$GET (&uaf_rab);
4668 if (!(status&1))
4669 {
4670 errno = EVMSERR;
4671 vaxc$errno = status;
4672 return 0;
4673 }
4674 /* close the User Authorization File */
4675 status = SYS$DISCONNECT (&uaf_rab);
4676 if (!(status&1))
4677 {
4678 errno = EVMSERR;
4679 vaxc$errno = status;
4680 return 0;
4681 }
4682 status = SYS$CLOSE (&uaf_fab);
4683 if (!(status&1))
4684 {
4685 errno = EVMSERR;
4686 vaxc$errno = status;
4687 return 0;
4688 }
4689 return &retuaf;
4690}
4691
4692static struct passwd retpw;
4693
4694struct passwd *
4695cnv_uaf_pw (up)
4696 struct UAF * up;
4697{
4698 char * ptr;
4699
4700 /* copy these out first because if the username is 32 chars, the next
4701 section will overwrite the first byte of the UIC */
4702 retpw.pw_uid = up->uaf$w_mem;
4703 retpw.pw_gid = up->uaf$w_grp;
4704
4705 /* I suppose this is not the best style, to possibly overwrite one
4706 byte beyond the end of the field, but what the heck... */
4707 ptr = &up->uaf$t_username[UAF$S_USERNAME];
4708 while (ptr[-1] == ' ')
4709 ptr--;
4710 *ptr = '\0';
4711 strcpy (retpw.pw_name, up->uaf$t_username);
4712
4713 /* the rest of these are counted ascii strings */
4714 strncpy (retpw.pw_gecos, &up->uaf$t_owner[1], up->uaf$t_owner[0]);
4715 retpw.pw_gecos[up->uaf$t_owner[0]] = '\0';
4716 strncpy (retpw.pw_dir, &up->uaf$t_defdev[1], up->uaf$t_defdev[0]);
4717 retpw.pw_dir[up->uaf$t_defdev[0]] = '\0';
4718 strncat (retpw.pw_dir, &up->uaf$t_defdir[1], up->uaf$t_defdir[0]);
4719 retpw.pw_dir[up->uaf$t_defdev[0] + up->uaf$t_defdir[0]] = '\0';
4720 strncpy (retpw.pw_shell, &up->uaf$t_defcli[1], up->uaf$t_defcli[0]);
4721 retpw.pw_shell[up->uaf$t_defcli[0]] = '\0';
4722
4723 return &retpw;
4724}
4725#else /* not READ_SYSUAF */
4726static struct passwd retpw;
4727#endif /* not READ_SYSUAF */
4728
4729struct passwd *
4730getpwnam (name)
4731 char * name;
4732{
4733#ifdef READ_SYSUAF
4734 struct UAF *up;
4735#else
4736 char * user;
4737 char * dir;
4738 unsigned char * full;
4739#endif /* READ_SYSUAF */
4740 char *ptr = name;
4741
4742 while (*ptr)
4743 {
4744 if ('a' <= *ptr && *ptr <= 'z')
4745 *ptr -= 040;
4746 ptr++;
4747 }
4748#ifdef READ_SYSUAF
4749 if (!(up = get_uaf_name (name)))
4750 return 0;
4751 return cnv_uaf_pw (up);
4752#else
4753 if (strcmp (name, getenv ("USER")) == 0)
4754 {
4755 retpw.pw_uid = getuid ();
4756 retpw.pw_gid = getgid ();
4757 strcpy (retpw.pw_name, name);
4758 if (full = egetenv ("FULLNAME"))
4759 strcpy (retpw.pw_gecos, full);
4760 else
4761 *retpw.pw_gecos = '\0';
4762 strcpy (retpw.pw_dir, egetenv ("HOME"));
4763 *retpw.pw_shell = '\0';
4764 return &retpw;
4765 }
4766 else
4767 return 0;
4768#endif /* not READ_SYSUAF */
4769}
4770
4771struct passwd *
4772getpwuid (uid)
4773 unsigned long uid;
4774{
4775#ifdef READ_SYSUAF
4776 struct UAF * up;
4777
4778 if (!(up = get_uaf_uic (uid)))
4779 return 0;
4780 return cnv_uaf_pw (up);
4781#else
4782 if (uid == sys_getuid ())
4783 return getpwnam (egetenv ("USER"));
4784 else
4785 return 0;
4786#endif /* not READ_SYSUAF */
4787}
4788
4789/* return total address space available to the current process. This is
4790 the sum of the current p0 size, p1 size and free page table entries
4791 available. */
4792int
4793vlimit ()
4794{
4795 int item_code;
4796 unsigned long free_pages;
4797 unsigned long frep0va;
4798 unsigned long frep1va;
4799 register status;
4800
4801 item_code = JPI$_FREPTECNT;
4802 if (((status = LIB$GETJPI (&item_code, 0, 0, &free_pages)) & 1) == 0)
4803 {
4804 errno = EVMSERR;
4805 vaxc$errno = status;
4806 return -1;
4807 }
4808 free_pages *= 512;
4809
4810 item_code = JPI$_FREP0VA;
4811 if (((status = LIB$GETJPI (&item_code, 0, 0, &frep0va)) & 1) == 0)
4812 {
4813 errno = EVMSERR;
4814 vaxc$errno = status;
4815 return -1;
4816 }
4817 item_code = JPI$_FREP1VA;
4818 if (((status = LIB$GETJPI (&item_code, 0, 0, &frep1va)) & 1) == 0)
4819 {
4820 errno = EVMSERR;
4821 vaxc$errno = status;
4822 return -1;
4823 }
4824
4825 return free_pages + frep0va + (0x7fffffff - frep1va);
4826}
4827
4828int
4829define_logical_name (varname, string)
4830 char *varname;
4831 char *string;
4832{
4833 struct dsc$descriptor_s strdsc =
4834 {strlen (string), DSC$K_DTYPE_T, DSC$K_CLASS_S, string};
4835 struct dsc$descriptor_s envdsc =
4836 {strlen (varname), DSC$K_DTYPE_T, DSC$K_CLASS_S, varname};
4837 struct dsc$descriptor_s lnmdsc =
4838 {7, DSC$K_DTYPE_T, DSC$K_CLASS_S, "LNM$JOB"};
4839
4840 return LIB$SET_LOGICAL (&envdsc, &strdsc, &lnmdsc, 0, 0);
4841}
4842
4843int
4844delete_logical_name (varname)
4845 char *varname;
4846{
4847 struct dsc$descriptor_s envdsc =
4848 {strlen (varname), DSC$K_DTYPE_T, DSC$K_CLASS_S, varname};
4849 struct dsc$descriptor_s lnmdsc =
4850 {7, DSC$K_DTYPE_T, DSC$K_CLASS_S, "LNM$JOB"};
4851
4852 return LIB$DELETE_LOGICAL (&envdsc, &lnmdsc);
4853}
4854
4855int
4856ulimit ()
4857{
4858 return 0;
4859}
4860
4861int
4862setpgrp ()
4863{
4864 return 0;
4865}
4866
4867int
4868execvp ()
4869{
4870 error ("execvp system call not implemented");
4871 return -1;
4872}
4873
4874int
4875rename (from, to)
4876 char *from, *to;
4877{
4878 int status;
4879 struct FAB from_fab = cc$rms_fab, to_fab = cc$rms_fab;
4880 struct NAM from_nam = cc$rms_nam, to_nam = cc$rms_nam;
4881 char from_esn[NAM$C_MAXRSS];
4882 char to_esn[NAM$C_MAXRSS];
4883
4884 from_fab.fab$l_fna = from;
4885 from_fab.fab$b_fns = strlen (from);
4886 from_fab.fab$l_nam = &from_nam;
4887 from_fab.fab$l_fop = FAB$M_NAM;
4888
4889 from_nam.nam$l_esa = from_esn;
4890 from_nam.nam$b_ess = sizeof from_esn;
4891
4892 to_fab.fab$l_fna = to;
4893 to_fab.fab$b_fns = strlen (to);
4894 to_fab.fab$l_nam = &to_nam;
4895 to_fab.fab$l_fop = FAB$M_NAM;
4896
4897 to_nam.nam$l_esa = to_esn;
4898 to_nam.nam$b_ess = sizeof to_esn;
4899
4900 status = SYS$RENAME (&from_fab, 0, 0, &to_fab);
4901
4902 if (status & 1)
4903 return 0;
4904 else
4905 {
4906 if (status == RMS$_DEV)
4907 errno = EXDEV;
4908 else
4909 errno = EVMSERR;
4910 vaxc$errno = status;
4911 return -1;
4912 }
4913}
4914
4915/* This function renames a file like `rename', but it strips
4916 the version number from the "to" filename, such that the "to" file is
4917 will always be a new version. It also sets the file protection once it is
4918 finished. The protection that we will use is stored in fab_final_pro,
4919 and was set when we did a creat_copy_attrs to create the file that we
4920 are renaming.
4921
4922 We could use the chmod function, but Eunichs uses 3 bits per user category
4923 to describe the protection, and VMS uses 4 (write and delete are separate
4924 bits). To maintain portability, the VMS implementation of `chmod' wires
4925 the W and D bits together. */
4926
4927
4928static struct fibdef fib; /* We need this initialized to zero */
4929char vms_file_written[NAM$C_MAXRSS];
4930
4931int
4932rename_sans_version (from,to)
4933 char *from, *to;
4934{
4935 short int chan;
4936 int stat;
4937 short int iosb[4];
4938 int status;
4939 struct FAB to_fab = cc$rms_fab;
4940 struct NAM to_nam = cc$rms_nam;
4941 struct dsc$descriptor fib_d ={sizeof (fib),0,0,(char*) &fib};
4942 struct dsc$descriptor fib_attr[2]
4943 = {{sizeof (fab_final_pro),ATR$C_FPRO,0,(char*) &fab_final_pro},{0,0,0,0}};
4944 char to_esn[NAM$C_MAXRSS];
4945
4946 $DESCRIPTOR (disk,to_esn);
4947
4948 to_fab.fab$l_fna = to;
4949 to_fab.fab$b_fns = strlen (to);
4950 to_fab.fab$l_nam = &to_nam;
4951 to_fab.fab$l_fop = FAB$M_NAM;
4952
4953 to_nam.nam$l_esa = to_esn;
4954 to_nam.nam$b_ess = sizeof to_esn;
4955
4956 status = SYS$PARSE (&to_fab, 0, 0); /* figure out the full file name */
4957
4958 if (to_nam.nam$l_fnb && NAM$M_EXP_VER)
4959 *(to_nam.nam$l_ver) = '\0';
4960
4961 stat = rename (from, to_esn);
4962 if (stat < 0)
4963 return stat;
4964
4965 strcpy (vms_file_written, to_esn);
4966
4967 to_fab.fab$l_fna = vms_file_written; /* this points to the versionless name */
4968 to_fab.fab$b_fns = strlen (vms_file_written);
4969
4970 /* Now set the file protection to the correct value */
4971 SYS$OPEN (&to_fab, 0, 0); /* This fills in the nam$w_fid fields */
4972
4973 /* Copy these fields into the fib */
4974 fib.fib$r_fid_overlay.fib$w_fid[0] = to_nam.nam$w_fid[0];
4975 fib.fib$r_fid_overlay.fib$w_fid[1] = to_nam.nam$w_fid[1];
4976 fib.fib$r_fid_overlay.fib$w_fid[2] = to_nam.nam$w_fid[2];
4977
4978 SYS$CLOSE (&to_fab, 0, 0);
4979
4980 stat = SYS$ASSIGN (&disk, &chan, 0, 0); /* open a channel to the disk */
4981 if (!stat)
4982 LIB$SIGNAL (stat);
4983 stat = SYS$QIOW (0, chan, IO$_MODIFY, iosb, 0, 0, &fib_d,
4984 0, 0, 0, &fib_attr, 0);
4985 if (!stat)
4986 LIB$SIGNAL (stat);
4987 stat = SYS$DASSGN (chan);
4988 if (!stat)
4989 LIB$SIGNAL (stat);
4990 strcpy (vms_file_written, to_esn); /* We will write this to the terminal*/
4991 return 0;
4992}
4993
4994int
4995link (file, new)
4996 char * file, * new;
4997{
4998 register status;
4999 struct FAB fab;
5000 struct NAM nam;
5001 unsigned short fid[3];
5002 char esa[NAM$C_MAXRSS];
5003
5004 fab = cc$rms_fab;
5005 fab.fab$l_fop = FAB$M_OFP;
5006 fab.fab$l_fna = file;
5007 fab.fab$b_fns = strlen (file);
5008 fab.fab$l_nam = &nam;
5009
5010 nam = cc$rms_nam;
5011 nam.nam$l_esa = esa;
5012 nam.nam$b_ess = NAM$C_MAXRSS;
5013
5014 status = SYS$PARSE (&fab);
5015 if ((status & 1) == 0)
5016 {
5017 errno = EVMSERR;
5018 vaxc$errno = status;
5019 return -1;
5020 }
5021 status = SYS$SEARCH (&fab);
5022 if ((status & 1) == 0)
5023 {
5024 errno = EVMSERR;
5025 vaxc$errno = status;
5026 return -1;
5027 }
5028
5029 fid[0] = nam.nam$w_fid[0];
5030 fid[1] = nam.nam$w_fid[1];
5031 fid[2] = nam.nam$w_fid[2];
5032
5033 fab.fab$l_fna = new;
5034 fab.fab$b_fns = strlen (new);
5035
5036 status = SYS$PARSE (&fab);
5037 if ((status & 1) == 0)
5038 {
5039 errno = EVMSERR;
5040 vaxc$errno = status;
5041 return -1;
5042 }
5043
5044 nam.nam$w_fid[0] = fid[0];
5045 nam.nam$w_fid[1] = fid[1];
5046 nam.nam$w_fid[2] = fid[2];
5047
5048 nam.nam$l_esa = nam.nam$l_name;
5049 nam.nam$b_esl = nam.nam$b_name + nam.nam$b_type + nam.nam$b_ver;
5050
5051 status = SYS$ENTER (&fab);
5052 if ((status & 1) == 0)
5053 {
5054 errno = EVMSERR;
5055 vaxc$errno = status;
5056 return -1;
5057 }
5058
5059 return 0;
5060}
5061
5062void
5063croak (badfunc)
5064 char *badfunc;
5065{
5066 printf ("%s not yet implemented\r\n", badfunc);
5067 reset_sys_modes ();
5068 exit (1);
5069}
5070
5071long
5072random ()
5073{
5074 /* Arrange to return a range centered on zero. */
5075 return rand () - (1 << 30);
5076}
5077
5078void
5079srandom (seed)
5080{
5081 srand (seed);
5082}
5083#endif /* VMS */
5084\f
5085#ifdef AIXHFT
5086
5087/* Called from init_sys_modes. */
5088void
5089hft_init ()
5090{
5091 int junk;
5092
5093 /* If we're not on an HFT we shouldn't do any of this. We determine
5094 if we are on an HFT by trying to get an HFT error code. If this
5095 call fails, we're not on an HFT. */
5096#ifdef IBMR2AIX
5097 if (ioctl (0, HFQERROR, &junk) < 0)
5098 return;
5099#else /* not IBMR2AIX */
5100 if (ioctl (0, HFQEIO, 0) < 0)
5101 return;
5102#endif /* not IBMR2AIX */
5103
5104 /* On AIX the default hft keyboard mapping uses backspace rather than delete
5105 as the rubout key's ASCII code. Here this is changed. The bug is that
5106 there's no way to determine the old mapping, so in reset_sys_modes
5107 we need to assume that the normal map had been present. Of course, this
5108 code also doesn't help if on a terminal emulator which doesn't understand
5109 HFT VTD's. */
5110 {
5111 struct hfbuf buf;
5112 struct hfkeymap keymap;
5113
5114 buf.hf_bufp = (char *)&keymap;
5115 buf.hf_buflen = sizeof (keymap);
5116 keymap.hf_nkeys = 2;
5117 keymap.hfkey[0].hf_kpos = 15;
5118 keymap.hfkey[0].hf_kstate = HFMAPCHAR | HFSHFNONE;
5119#ifdef IBMR2AIX
5120 keymap.hfkey[0].hf_keyidh = '<';
5121#else /* not IBMR2AIX */
5122 keymap.hfkey[0].hf_page = '<';
5123#endif /* not IBMR2AIX */
5124 keymap.hfkey[0].hf_char = 127;
5125 keymap.hfkey[1].hf_kpos = 15;
5126 keymap.hfkey[1].hf_kstate = HFMAPCHAR | HFSHFSHFT;
5127#ifdef IBMR2AIX
5128 keymap.hfkey[1].hf_keyidh = '<';
5129#else /* not IBMR2AIX */
5130 keymap.hfkey[1].hf_page = '<';
5131#endif /* not IBMR2AIX */
5132 keymap.hfkey[1].hf_char = 127;
5133 hftctl (0, HFSKBD, &buf);
5134 }
5135 /* The HFT system on AIX doesn't optimize for scrolling, so it's really ugly
5136 at times. */
5137 line_ins_del_ok = char_ins_del_ok = 0;
5138}
5139
5140/* Reset the rubout key to backspace. */
5141
5142void
5143hft_reset ()
5144{
5145 struct hfbuf buf;
5146 struct hfkeymap keymap;
5147 int junk;
5148
5149#ifdef IBMR2AIX
5150 if (ioctl (0, HFQERROR, &junk) < 0)
5151 return;
5152#else /* not IBMR2AIX */
5153 if (ioctl (0, HFQEIO, 0) < 0)
5154 return;
5155#endif /* not IBMR2AIX */
5156
5157 buf.hf_bufp = (char *)&keymap;
5158 buf.hf_buflen = sizeof (keymap);
5159 keymap.hf_nkeys = 2;
5160 keymap.hfkey[0].hf_kpos = 15;
5161 keymap.hfkey[0].hf_kstate = HFMAPCHAR | HFSHFNONE;
5162#ifdef IBMR2AIX
5163 keymap.hfkey[0].hf_keyidh = '<';
5164#else /* not IBMR2AIX */
5165 keymap.hfkey[0].hf_page = '<';
5166#endif /* not IBMR2AIX */
5167 keymap.hfkey[0].hf_char = 8;
5168 keymap.hfkey[1].hf_kpos = 15;
5169 keymap.hfkey[1].hf_kstate = HFMAPCHAR | HFSHFSHFT;
5170#ifdef IBMR2AIX
5171 keymap.hfkey[1].hf_keyidh = '<';
5172#else /* not IBMR2AIX */
5173 keymap.hfkey[1].hf_page = '<';
5174#endif /* not IBMR2AIX */
5175 keymap.hfkey[1].hf_char = 8;
5176 hftctl (0, HFSKBD, &buf);
5177}
5178
5179#endif /* AIXHFT */
5180
5181#ifdef USE_DL_STUBS
5182
5183/* These are included on Sunos 4.1 when we do not use shared libraries.
5184 X11 libraries may refer to these functions but (we hope) do not
5185 actually call them. */
5186
5187void *
5188dlopen ()
5189{
5190 return 0;
5191}
5192
5193void *
5194dlsym ()
5195{
5196 return 0;
5197}
5198
5199int
5200dlclose ()
5201{
5202 return -1;
5203}
5204
5205#endif /* USE_DL_STUBS */
5206\f
5207#ifndef BSTRING
5208
5209#ifndef bzero
5210
5211void
5212bzero (b, length)
5213 register char *b;
5214 register int length;
5215{
5216#ifdef VMS
5217 short zero = 0;
5218 long max_str = 65535;
5219
5220 while (length > max_str) {
5221 (void) LIB$MOVC5 (&zero, &zero, &zero, &max_str, b);
5222 length -= max_str;
5223 b += max_str;
5224 }
5225 max_str = length;
5226 (void) LIB$MOVC5 (&zero, &zero, &zero, &max_str, b);
5227#else
5228 while (length-- > 0)
5229 *b++ = 0;
5230#endif /* not VMS */
5231}
5232
5233#endif /* no bzero */
5234#endif /* BSTRING */
5235
5236#if (!defined (BSTRING) && !defined (bcopy)) || defined (NEED_BCOPY)
5237#undef bcopy
5238
5239/* Saying `void' requires a declaration, above, where bcopy is used
5240 and that declaration causes pain for systems where bcopy is a macro. */
5241bcopy (b1, b2, length)
5242 register char *b1;
5243 register char *b2;
5244 register int length;
5245{
5246#ifdef VMS
5247 long max_str = 65535;
5248
5249 while (length > max_str) {
5250 (void) LIB$MOVC3 (&max_str, b1, b2);
5251 length -= max_str;
5252 b1 += max_str;
5253 b2 += max_str;
5254 }
5255 max_str = length;
5256 (void) LIB$MOVC3 (&length, b1, b2);
5257#else
5258 while (length-- > 0)
5259 *b2++ = *b1++;
5260#endif /* not VMS */
5261}
5262#endif /* (!defined (BSTRING) && !defined (bcopy)) || defined (NEED_BCOPY) */
5263
5264#ifndef BSTRING
5265#ifndef bcmp
5266int
5267bcmp (b1, b2, length) /* This could be a macro! */
5268 register char *b1;
5269 register char *b2;
5270 register int length;
5271{
5272#ifdef VMS
5273 struct dsc$descriptor_s src1 = {length, DSC$K_DTYPE_T, DSC$K_CLASS_S, b1};
5274 struct dsc$descriptor_s src2 = {length, DSC$K_DTYPE_T, DSC$K_CLASS_S, b2};
5275
5276 return STR$COMPARE (&src1, &src2);
5277#else
5278 while (length-- > 0)
5279 if (*b1++ != *b2++)
5280 return 1;
5281
5282 return 0;
5283#endif /* not VMS */
5284}
5285#endif /* no bcmp */
5286#endif /* not BSTRING */
5287\f
5288#ifndef HAVE_STRSIGNAL
5289char *
5290strsignal (code)
5291 int code;
5292{
5293 char *signame = 0;
5294
5295 if (0 <= code && code < NSIG)
5296 {
5297#ifdef VMS
5298 signame = sys_errlist[code];
5299#else
5300 /* Cast to suppress warning if the table has const char *. */
5301 signame = (char *) sys_siglist[code];
5302#endif
5303 }
5304
5305 return signame;
5306}
5307#endif /* HAVE_STRSIGNAL */
5308
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