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Update FSF's address in the preamble.
[bpt/emacs.git] / src / sysdep.c
CommitLineData
86a5659e 1/* Interfaces to system-dependent kernel and library entries.
2ac53dfa 2 Copyright (C) 1985, 86, 87, 88, 93, 94, 95 Free Software Foundation, Inc.
86a5659e
JB		 3
4This file is part of GNU Emacs.
5
6GNU Emacs is free software; you can redistribute it and/or modify
7it under the terms of the GNU General Public License as published by
7088d1ca 8the Free Software Foundation; either version 2, or (at your option)
86a5659e
JB		 9any later version.
10
11GNU Emacs is distributed in the hope that it will be useful,
12but WITHOUT ANY WARRANTY; without even the implied warranty of
13MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14GNU General Public License for more details.
15
16You should have received a copy of the GNU General Public License
17along with GNU Emacs; see the file COPYING. If not, write to
3b7ad313
EN		 18the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19Boston, MA 02111-1307, USA. */
86a5659e
JB		 20
21
22#include <signal.h>
23#include <setjmp.h>
24
18160b98 25#include <config.h>
86a5659e 26#include "lisp.h"
9ac0d9e0 27#include "blockinput.h"
86a5659e
JB		 28#undef NULL
29
30#define min(x,y) ((x) > (y) ? (y) : (x))
31
32/* In this file, open, read and write refer to the system calls,
33 not our sugared interfaces sys_open, sys_read and sys_write.
34 Contrariwise, for systems where we use the system calls directly,
35 define sys_read, etc. here as aliases for them. */
36#ifndef read
37#define sys_read read
38#define sys_write write
39#endif /* `read' is not a macro */
40
41#undef read
42#undef write
43
fe03522b
RS		 44#ifdef WINDOWSNT
45#define read _read
46#define write _write
47#include <windows.h>
48extern int errno;
49#endif /* not WINDOWSNT */
50
86a5659e
JB		 51#ifndef close
52#define sys_close close
53#else
54#undef close
55#endif
56
57#ifndef open
58#define sys_open open
59#else /* `open' is a macro */
60#undef open
61#endif /* `open' is a macro */
62
986ffb24
JB		 63/* Does anyone other than VMS need this? */
64#ifndef fwrite
65#define sys_fwrite fwrite
66#else
67#undef fwrite
68#endif
69
e24f1d55
RS		 70#ifndef HAVE_H_ERRNO
71extern int h_errno;
72#endif
73
86a5659e
JB		 74#include <stdio.h>
75#include <sys/types.h>
76#include <sys/stat.h>
77#include <errno.h>
78
dca8521c
RS		 79/* Get _POSIX_VDISABLE, if it is available. */
80#ifdef HAVE_UNISTD_H
81#include <unistd.h>
82#endif
83
207bdbdb
RS		 84#ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida, MW Aug 1993 */
85#include <dos.h>
86#include "dosfns.h"
87#include "msdos.h"
88#include <sys/param.h>
89#endif
90
86a5659e 91extern int errno;
86a5659e 92
bb4bc8e2
RM		 93#ifdef VMS
94#include <rms.h>
95#include <ttdef.h>
96#include <tt2def.h>
97#include <iodef.h>
98#include <ssdef.h>
99#include <descrip.h>
100#include <fibdef.h>
101#include <atrdef.h>
102#include <ctype.h>
103#include <string.h>
104#ifdef __GNUC__
105#include <sys/file.h>
106#else
107#include <file.h>
108#endif
109#undef F_SETFL
110#ifndef RAB$C_BID
111#include <rab.h>
112#endif
fe03522b 113#define MAXIOSIZE (32 * PAGESIZE) /* Don't I/O more than 32 blocks at a time */
bb4bc8e2
RM		 114#endif /* VMS */
115
116#ifndef BSD4_1
117#ifdef BSD /* this is done this way to avoid defined (BSD) || defined (USG)
118 because the vms compiler doesn't grok `defined' */
119#include <fcntl.h>
120#endif
121#ifdef USG
122#ifndef USG5
123#include <fcntl.h>
124#endif
125#endif
126#endif /* not 4.1 bsd */
86a5659e 127
207bdbdb 128#ifndef MSDOS
86a5659e 129#include <sys/ioctl.h>
207bdbdb 130#endif
e04a4e0d 131#include "systty.h"
94c8642a 132#include "syswait.h"
86a5659e 133
86a5659e
JB		 134#ifdef BROKEN_TIOCGWINSZ
135#undef TIOCGWINSZ
8dca3179 136#undef TIOCSWINSZ
86a5659e
JB		 137#endif
138
86a5659e
JB		 139#ifdef USG
140#include <sys/utsname.h>
141#include <string.h>
142#ifndef MEMORY_IN_STRING_H
143#include <memory.h>
144#endif
81444907 145#if defined (TIOCGWINSZ) || defined (ISC4_0)
86a5659e
JB		 146#ifdef NEED_SIOCTL
147#include <sys/sioctl.h>
148#endif
149#ifdef NEED_PTEM_H
150#include <sys/stream.h>
151#include <sys/ptem.h>
152#endif
81444907 153#endif /* TIOCGWINSZ or ISC4_0 */
86a5659e
JB		 154#endif /* USG */
155
86a5659e
JB		 156extern int quit_char;
157
0137dbf7 158#include "frame.h"
86a5659e
JB		 159#include "window.h"
160#include "termhooks.h"
161#include "termchar.h"
162#include "termopts.h"
163#include "dispextern.h"
164#include "process.h"
165
fe03522b
RS		 166#ifdef WINDOWSNT
167#include <direct.h>
168/* In process.h which conflicts with the local copy. */
169#define _P_WAIT 0
170int _CRTAPI1 _spawnlp (int, const char *, const char *, ...);
171int _CRTAPI1 _getpid (void);
172#endif
173
86a5659e
JB		 174#ifdef NONSYSTEM_DIR_LIBRARY
175#include "ndir.h"
176#endif /* NONSYSTEM_DIR_LIBRARY */
177
91bac16a
JB		 178#include "syssignal.h"
179#include "systime.h"
d79998bc
KH		 180#ifdef HAVE_UTIME_H
181#include <utime.h>
182#endif
183
184#ifndef HAVE_UTIMES
185#ifndef HAVE_STRUCT_UTIMBUF
186/* We want to use utime rather than utimes, but we couldn't find the
187 structure declaration. We'll use the traditional one. */
188struct utimbuf {
189 long actime;
190 long modtime;
191};
192#endif
193#endif
86a5659e 194
e336874b
KH		 195#ifndef VFORK_RETURN_TYPE
196#define VFORK_RETURN_TYPE int
197#endif
198
a00d5589
RS		 199/* LPASS8 is new in 4.3, and makes cbreak mode provide all 8 bits. */
200#ifndef LPASS8
201#define LPASS8 0
202#endif
203
204#ifdef BSD4_1
205#define LNOFLSH 0100000
206#endif
207
86a5659e
JB		 208static int baud_convert[] =
209#ifdef BAUD_CONVERT
210 BAUD_CONVERT;
211#else
212 {
213 0, 50, 75, 110, 135, 150, 200, 300, 600, 1200,
214 1800, 2400, 4800, 9600, 19200, 38400
215 };
216#endif
217
218extern short ospeed;
219
91bac16a 220/* The file descriptor for Emacs's input terminal.
0217ed57
RS		 221 Under Unix, this is normally zero except when using X;
222 under VMS, we place the input channel number here. */
223int input_fd;
64e971c3
RS		 224\f
225/* Specify a different file descriptor for further input operations. */
226
227void
228change_input_fd (fd)
229 int fd;
230{
231 input_fd = fd;
232}
233
234/* Discard pending input on descriptor input_fd. */
91bac16a 235
86a5659e
JB		 236discard_tty_input ()
237{
fe03522b 238#ifndef WINDOWSNT
91bac16a 239 struct emacs_tty buf;
86a5659e
JB		 240
241 if (noninteractive)
242 return;
243
244 /* Discarding input is not safe when the input could contain
245 replies from the X server. So don't do it. */
246 if (read_socket_hook)
247 return;
248
249#ifdef VMS
250 end_kbd_input ();
91bac16a
JB		 251 SYS$QIOW (0, input_fd, IO$_READVBLK|IO$M_PURGE, input_iosb, 0, 0,
252 &buf.main, 0, 0, terminator_mask, 0, 0);
86a5659e
JB		 253 queue_kbd_input ();
254#else /* not VMS */
255#ifdef APOLLO
256 {
257 int zero = 0;
64e971c3 258 ioctl (input_fd, TIOCFLUSH, &zero);
86a5659e
JB		 259 }
260#else /* not Apollo */
fe03522b 261#ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */
207bdbdb 262 while (dos_keyread () != -1)
fe03522b 263 ;
207bdbdb 264#else /* not MSDOS */
91bac16a
JB		 265 EMACS_GET_TTY (input_fd, &buf);
266 EMACS_SET_TTY (input_fd, &buf, 0);
207bdbdb 267#endif /* not MSDOS */
86a5659e
JB		 268#endif /* not Apollo */
269#endif /* not VMS */
fe03522b 270#endif /* not WINDOWSNT */
86a5659e
JB		 271}
272
273#ifdef SIGTSTP
274
64e971c3
RS		 275/* Arrange for character C to be read as the next input from
276 the terminal. */
277
86a5659e
JB		 278stuff_char (c)
279 char c;
280{
23dab951
RS		 281 if (read_socket_hook)
282 return;
283
86a5659e
JB		 284/* Should perhaps error if in batch mode */
285#ifdef TIOCSTI
64e971c3 286 ioctl (input_fd, TIOCSTI, &c);
86a5659e 287#else /* no TIOCSTI */
71f06467 288 error ("Cannot stuff terminal input characters in this version of Unix");
86a5659e
JB		 289#endif /* no TIOCSTI */
290}
291
292#endif /* SIGTSTP */
64e971c3 293\f
86a5659e
JB		 294init_baud_rate ()
295{
86a5659e
JB		 296 if (noninteractive)
297 ospeed = 0;
298 else
299 {
fe03522b 300#ifdef DOS_NT
207bdbdb 301 ospeed = 15;
fe03522b 302#else /* not DOS_NT */
86a5659e 303#ifdef VMS
91bac16a
JB		 304 struct sensemode sg;
305
306 SYS$QIOW (0, input_fd, IO$_SENSEMODE, &sg, 0, 0,
86a5659e 307 &sg.class, 12, 0, 0, 0, 0 );
91bac16a
JB		 308 ospeed = sg.xmit_baud;
309#else /* not VMS */
e04a4e0d
JB		 310#ifdef HAVE_TERMIOS
311 struct termios sg;
91bac16a 312
71f06467 313 sg.c_cflag = B9600;
64e971c3 314 tcgetattr (input_fd, &sg);
d7272cff 315 ospeed = cfgetospeed (&sg);
5baff9ce 316#if defined (USE_GETOBAUD) && defined (getobaud)
2f43149b
RS		 317 /* m88k-motorola-sysv3 needs this (ghazi@noc.rutgers.edu) 9/1/94. */
318 if (ospeed == 0)
319 ospeed = getobaud (sg.c_cflag);
320#endif
e04a4e0d
JB		 321#else /* neither VMS nor TERMIOS */
322#ifdef HAVE_TERMIO
323 struct termio sg;
91bac16a 324
71f06467 325 sg.c_cflag = B9600;
e04a4e0d 326#ifdef HAVE_TCATTR
64e971c3 327 tcgetattr (input_fd, &sg);
e04a4e0d 328#else
6c65530f 329 ioctl (input_fd, TCGETA, &sg);
e04a4e0d 330#endif
91bac16a 331 ospeed = sg.c_cflag & CBAUD;
e04a4e0d 332#else /* neither VMS nor TERMIOS nor TERMIO */
91bac16a
JB		 333 struct sgttyb sg;
334
335 sg.sg_ospeed = B9600;
64e971c3 336 if (ioctl (input_fd, TIOCGETP, &sg) < 0)
d7272cff 337 abort ();
91bac16a 338 ospeed = sg.sg_ospeed;
91bac16a 339#endif /* not HAVE_TERMIO */
e04a4e0d 340#endif /* not HAVE_TERMIOS */
86a5659e 341#endif /* not VMS */
fe03522b 342#endif /* not DOS_NT */
86a5659e
JB		 343 }
344
345 baud_rate = (ospeed < sizeof baud_convert / sizeof baud_convert[0]
fe03522b 346 ? baud_convert[ospeed] : 9600);
86a5659e
JB		 347 if (baud_rate == 0)
348 baud_rate = 1200;
349}
350
351/*ARGSUSED*/
352set_exclusive_use (fd)
353 int fd;
354{
355#ifdef FIOCLEX
356 ioctl (fd, FIOCLEX, 0);
357#endif
358 /* Ok to do nothing if this feature does not exist */
359}
64e971c3 360\f
86a5659e
JB		 361#ifndef subprocesses
362
363wait_without_blocking ()
364{
365#ifdef BSD
366 wait3 (0, WNOHANG | WUNTRACED, 0);
367#else
368 croak ("wait_without_blocking");
369#endif
370 synch_process_alive = 0;
371}
372
373#endif /* not subprocesses */
374
375int wait_debugging; /* Set nonzero to make following function work under dbx
fe03522b 376 (at least for bsd). */
86a5659e
JB		 377
378SIGTYPE
379wait_for_termination_signal ()
380{}
381
382/* Wait for subprocess with process id `pid' to terminate and
383 make sure it will get eliminated (not remain forever as a zombie) */
384
385wait_for_termination (pid)
386 int pid;
387{
388 while (1)
389 {
390#ifdef subprocesses
391#ifdef VMS
392 int status;
393
986ffb24 394 status = SYS$FORCEX (&pid, 0, 0);
86a5659e
JB		 395 break;
396#else /* not VMS */
05695621 397#if defined (BSD) || (defined (HPUX) && !defined (HPUX_5))
4c8975ad
RS		 398 /* Note that kill returns -1 even if the process is just a zombie now.
399 But inevitably a SIGCHLD interrupt should be generated
400 and child_sig will do wait3 and make the process go away. */
401 /* There is some indication that there is a bug involved with
402 termination of subprocesses, perhaps involving a kernel bug too,
403 but no idea what it is. Just as a hunch we signal SIGCHLD to see
404 if that causes the problem to go away or get worse. */
405 sigsetmask (sigmask (SIGCHLD));
406 if (0 > kill (pid, 0))
fe03522b 407 {
4c8975ad
RS		 408 sigsetmask (SIGEMPTYMASK);
409 kill (getpid (), SIGCHLD);
410 break;
411 }
412 if (wait_debugging)
413 sleep (1);
414 else
415 sigpause (SIGEMPTYMASK);
05695621
RS		 416#else /* not BSD, and not HPUX version >= 6 */
417#if defined (UNIPLUS)
4c8975ad
RS		 418 if (0 > kill (pid, 0))
419 break;
420 wait (0);
05695621 421#else /* neither BSD nor UNIPLUS: random sysV */
fe03522b 422#ifdef POSIX_SIGNALS /* would this work for LINUX as well? */
9ab714c7
RS		 423 sigblock (sigmask (SIGCHLD));
424 if (0 > kill (pid, 0))
425 {
426 sigunblock (sigmask (SIGCHLD));
427 break;
428 }
92c995de 429 sigpause (SIGEMPTYMASK);
9ab714c7 430#else /* not POSIX_SIGNALS */
4c8975ad
RS		 431#ifdef HAVE_SYSV_SIGPAUSE
432 sighold (SIGCHLD);
433 if (0 > kill (pid, 0))
434 {
435 sigrelse (SIGCHLD);
436 break;
437 }
438 sigpause (SIGCHLD);
439#else /* not HAVE_SYSV_SIGPAUSE */
fe03522b
RS		 440#ifdef WINDOWSNT
441 wait (0);
442 break;
443#else /* not WINDOWSNT */
4c8975ad 444 if (0 > kill (pid, 0))
86a5659e 445 break;
4c8975ad
RS		 446 /* Using sleep instead of pause avoids timing error.
447 If the inferior dies just before the sleep,
448 we lose just one second. */
449 sleep (1);
fe03522b 450#endif /* not WINDOWSNT */
4c8975ad 451#endif /* not HAVE_SYSV_SIGPAUSE */
9ab714c7 452#endif /* not POSIX_SIGNALS */
4c8975ad
RS		 453#endif /* not UNIPLUS */
454#endif /* not BSD, and not HPUX version >= 6 */
86a5659e
JB		 455#endif /* not VMS */
456#else /* not subprocesses */
457#ifndef BSD4_1
458 if (kill (pid, 0) < 0)
459 break;
460 wait (0);
461#else /* BSD4_1 */
462 int status;
463 status = wait (0);
464 if (status == pid || status == -1)
465 break;
466#endif /* BSD4_1 */
467#endif /* not subprocesses */
468 }
469}
470
471#ifdef subprocesses
472
473/*
474 * flush any pending output
475 * (may flush input as well; it does not matter the way we use it)
476 */
477
478flush_pending_output (channel)
479 int channel;
480{
481#ifdef HAVE_TERMIOS
482 /* If we try this, we get hit with SIGTTIN, because
483 the child's tty belongs to the child's pgrp. */
484#else
485#ifdef TCFLSH
486 ioctl (channel, TCFLSH, 1);
487#else
488#ifdef TIOCFLUSH
489 int zero = 0;
490 /* 3rd arg should be ignored
491 but some 4.2 kernels actually want the address of an int
492 and nonzero means something different. */
493 ioctl (channel, TIOCFLUSH, &zero);
494#endif
495#endif
496#endif
497}
64e971c3 498\f
86a5659e
JB		 499#ifndef VMS
500/* Set up the terminal at the other end of a pseudo-terminal that
501 we will be controlling an inferior through.
502 It should not echo or do line-editing, since that is done
503 in Emacs. No padding needed for insertion into an Emacs buffer. */
504
505child_setup_tty (out)
506 int out;
507{
fe03522b 508#ifndef DOS_NT
91bac16a
JB		 509 struct emacs_tty s;
510
511 EMACS_GET_TTY (out, &s);
86a5659e 512
31be8d24 513#if defined (HAVE_TERMIO) || defined (HAVE_TERMIOS)
91bac16a
JB		 514 s.main.c_oflag |= OPOST; /* Enable output postprocessing */
515 s.main.c_oflag &= ~ONLCR; /* Disable map of NL to CR-NL on output */
9d4e5eea 516#ifdef NLDLY
91bac16a
JB		 517 s.main.c_oflag &= ~(NLDLY|CRDLY|TABDLY|BSDLY|VTDLY|FFDLY);
518 /* No output delays */
9d4e5eea 519#endif
91bac16a
JB		 520 s.main.c_lflag &= ~ECHO; /* Disable echo */
521 s.main.c_lflag |= ISIG; /* Enable signals */
9d4e5eea
RS		 522#ifdef IUCLC
523 s.main.c_iflag &= ~IUCLC; /* Disable downcasing on input. */
524#endif
23e4c8be 525#ifdef OLCUC
9d4e5eea
RS		 526 s.main.c_oflag &= ~OLCUC; /* Disable upcasing on output. */
527#endif
1bf96fb5 528 s.main.c_cflag = (s.main.c_cflag & ~CSIZE) | CS8; /* Don't strip 8th bit */
91bac16a 529#if 0
eb8c3be9 530 /* Said to be unnecessary: */
91bac16a
JB		 531 s.main.c_cc[VMIN] = 1; /* minimum number of characters to accept */
532 s.main.c_cc[VTIME] = 0; /* wait forever for at least 1 character */
533#endif
534
535 s.main.c_lflag |= ICANON; /* Enable erase/kill and eof processing */
536 s.main.c_cc[VEOF] = 04; /* insure that EOF is Control-D */
441f6399
RS		 537 s.main.c_cc[VERASE] = CDISABLE; /* disable erase processing */
538 s.main.c_cc[VKILL] = CDISABLE; /* disable kill processing */
91bac16a 539
86a5659e 540#ifdef HPUX
91bac16a 541 s.main.c_cflag = (s.main.c_cflag & ~CBAUD) | B9600; /* baud rate sanity */
86a5659e 542#endif /* HPUX */
91bac16a 543
86a5659e
JB		 544#ifdef AIX
545/* AIX enhanced edit loses NULs, so disable it */
546#ifndef IBMR2AIX
91bac16a
JB		 547 s.main.c_line = 0;
548 s.main.c_iflag &= ~ASCEDIT;
86a5659e
JB		 549#endif
550 /* Also, PTY overloads NUL and BREAK.
551 don't ignore break, but don't signal either, so it looks like NUL. */
91bac16a
JB		 552 s.main.c_iflag &= ~IGNBRK;
553 s.main.c_iflag &= ~BRKINT;
554 /* QUIT and INTR work better as signals, so disable character forms */
91bac16a 555 s.main.c_cc[VINTR] = 0377;
e6cc3307
RS		 556#ifdef SIGNALS_VIA_CHARACTERS
557 /* the QUIT and INTR character are used in process_send_signal
558 so set them here to something useful. */
559 if (s.main.c_cc[VQUIT] == 0377)
560 s.main.c_cc[VQUIT] = '\\'&037; /* Control-\ */
561 if (s.main.c_cc[VINTR] == 0377)
562 s.main.c_cc[VINTR] = 'C'&037; /* Control-C */
563#else /* no TIOCGPGRP or no TIOCGLTC or no TIOCGETC */
564 /* QUIT and INTR work better as signals, so disable character forms */
565 s.main.c_cc[VQUIT] = 0377;
566 s.main.c_cc[VINTR] = 0377;
91bac16a 567 s.main.c_lflag &= ~ISIG;
e6cc3307
RS		 568#endif /* no TIOCGPGRP or no TIOCGLTC or no TIOCGETC */
569 s.main.c_cc[VEOL] = 0377;
91bac16a 570 s.main.c_cflag = (s.main.c_cflag & ~CBAUD) | B9600; /* baud rate sanity */
86a5659e
JB		 571#endif /* AIX */
572
573#else /* not HAVE_TERMIO */
91bac16a
JB		 574
575 s.main.sg_flags &= ~(ECHO | CRMOD | ANYP | ALLDELAY | RAW | LCASE
576 | CBREAK | TANDEM);
a00d5589 577 s.main.sg_flags |= LPASS8;
91bac16a
JB		 578 s.main.sg_erase = 0377;
579 s.main.sg_kill = 0377;
1bf96fb5 580 s.lmode = LLITOUT | s.lmode; /* Don't strip 8th bit */
91bac16a 581
86a5659e
JB		 582#endif /* not HAVE_TERMIO */
583
91bac16a 584 EMACS_SET_TTY (out, &s, 0);
86a5659e
JB		 585
586#ifdef BSD4_1
587 if (interrupt_input)
588 reset_sigio ();
589#endif /* BSD4_1 */
590#ifdef RTU
591 {
592 int zero = 0;
593 ioctl (out, FIOASYNC, &zero);
594 }
595#endif /* RTU */
fe03522b 596#endif /* not DOS_NT */
86a5659e
JB		 597}
598#endif /* not VMS */
599
600#endif /* subprocesses */
64e971c3 601\f
86a5659e
JB		 602/* Record a signal code and the handler for it. */
603struct save_signal
604{
605 int code;
606 SIGTYPE (*handler) ();
607};
608
609/* Suspend the Emacs process; give terminal to its superior. */
610
611sys_suspend ()
612{
613#ifdef VMS
88191e36
RS		 614 /* "Foster" parentage allows emacs to return to a subprocess that attached
615 to the current emacs as a cheaper than starting a whole new process. This
616 is set up by KEPTEDITOR.COM. */
617 unsigned long parent_id, foster_parent_id;
618 char *fpid_string;
619
620 fpid_string = getenv ("EMACS_PARENT_PID");
621 if (fpid_string != NULL)
622 {
623 sscanf (fpid_string, "%x", &foster_parent_id);
624 if (foster_parent_id != 0)
625 parent_id = foster_parent_id;
626 else
627 parent_id = getppid ();
628 }
629 else
630 parent_id = getppid ();
631
9ac0d9e0 632 xfree (fpid_string); /* On VMS, this was malloc'd */
86a5659e 633
86a5659e
JB		 634 if (parent_id && parent_id != 0xffffffff)
635 {
636 SIGTYPE (*oldsig)() = (int) signal (SIGINT, SIG_IGN);
637 int status = LIB$ATTACH (&parent_id) & 1;
638 signal (SIGINT, oldsig);
639 return status;
640 }
641 else
642 {
643 struct {
644 int l;
645 char *a;
646 } d_prompt;
647 d_prompt.l = sizeof ("Emacs: "); /* Our special prompt */
648 d_prompt.a = "Emacs: "; /* Just a reminder */
986ffb24 649 LIB$SPAWN (0, 0, 0, 0, 0, 0, 0, 0, 0, 0, &d_prompt, 0);
86a5659e
JB		 650 return 1;
651 }
652 return -1;
653#else
207bdbdb 654#if defined(SIGTSTP) && !defined(MSDOS)
86a5659e 655
5a570e37 656 {
e89a2cd5 657 int pgrp = EMACS_GETPGRP (0);
5a570e37
JB		 658 EMACS_KILLPG (pgrp, SIGTSTP);
659 }
86a5659e
JB		 660
661#else /* No SIGTSTP */
662#ifdef USG_JOBCTRL /* If you don't know what this is don't mess with it */
663 ptrace (0, 0, 0, 0); /* set for ptrace - caught by csh */
664 kill (getpid (), SIGQUIT);
665
666#else /* No SIGTSTP or USG_JOBCTRL */
667
668/* On a system where suspending is not implemented,
669 instead fork a subshell and let it talk directly to the terminal
670 while we wait. */
a0932daa
KH		 671 sys_subshell ();
672
673#endif /* no USG_JOBCTRL */
674#endif /* no SIGTSTP */
675#endif /* not VMS */
676}
677
678/* Fork a subshell. */
679
680sys_subshell ()
681{
682#ifndef VMS
683#ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */
684 int st;
685 char oldwd[MAXPATHLEN+1]; /* Fixed length is safe on MSDOS. */
686#endif
efa04277 687 int pid;
86a5659e 688 struct save_signal saved_handlers[5];
efa04277
RS		 689 Lisp_Object dir;
690 unsigned char *str = 0;
691 int len;
86a5659e
JB		 692
693 saved_handlers[0].code = SIGINT;
694 saved_handlers[1].code = SIGQUIT;
695 saved_handlers[2].code = SIGTERM;
696#ifdef SIGIO
697 saved_handlers[3].code = SIGIO;
698 saved_handlers[4].code = 0;
699#else
700 saved_handlers[3].code = 0;
701#endif
702
efa04277
RS		 703 /* Mentioning current_buffer->buffer would mean including buffer.h,
704 which somehow wedges the hp compiler. So instead... */
705
706 dir = intern ("default-directory");
0e7e7a58 707 if (NILP (Fboundp (dir)))
efa04277
RS		 708 goto xyzzy;
709 dir = Fsymbol_value (dir);
914e81a2 710 if (!STRINGP (dir))
efa04277
RS		 711 goto xyzzy;
712
713 dir = expand_and_dir_to_file (Funhandled_file_name_directory (dir), Qnil);
714 str = (unsigned char *) alloca (XSTRING (dir)->size + 2);
715 len = XSTRING (dir)->size;
716 bcopy (XSTRING (dir)->data, str, len);
717 if (str[len - 1] != '/') str[len++] = '/';
718 str[len] = 0;
719 xyzzy:
720
fe03522b
RS		 721#ifdef WINDOWSNT
722 pid = -1;
723#else /* not WINDOWSNT */
7964ba9e
RS		 724#ifdef MSDOS
725 pid = 0;
726#else
efa04277 727 pid = vfork ();
86a5659e
JB		 728 if (pid == -1)
729 error ("Can't spawn subshell");
7964ba9e
RS		 730#endif
731
86a5659e 732 if (pid == 0)
fe03522b 733#endif /* not WINDOWSNT */
86a5659e 734 {
7964ba9e 735 char *sh = 0;
86a5659e 736
fe03522b 737#ifdef MSDOS /* MW, Aug 1993 */
207bdbdb 738 getwd (oldwd);
7964ba9e
RS		 739 if (sh == 0)
740 sh = (char *) egetenv ("SUSPEND"); /* KFS, 1994-12-14 */
207bdbdb 741#endif
7964ba9e
RS		 742 if (sh == 0)
743 sh = (char *) egetenv ("SHELL");
86a5659e
JB		 744 if (sh == 0)
745 sh = "sh";
207bdbdb 746
86a5659e 747 /* Use our buffer's default directory for the subshell. */
efa04277 748 if (str)
86a5659e 749 chdir (str);
efa04277 750
86a5659e
JB		 751#ifdef subprocesses
752 close_process_descs (); /* Close Emacs's pipes/ptys */
753#endif
1593c2fe 754
6f8b4d01 755#ifdef SET_EMACS_PRIORITY
1593c2fe
JB		 756 {
757 extern int emacs_priority;
758
6f8b4d01 759 if (emacs_priority < 0)
1593c2fe
JB		 760 nice (-emacs_priority);
761 }
762#endif
763
fe03522b 764#ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */
207bdbdb
RS		 765 st = system (sh);
766 chdir (oldwd);
7964ba9e 767#if 0 /* This is also reported if last command executed in subshell failed, KFS */
207bdbdb 768 if (st)
fe03522b 769 report_file_error ("Can't execute subshell", Fcons (build_string (sh), Qnil));
7964ba9e 770#endif
207bdbdb 771#else /* not MSDOS */
fe03522b 772#ifdef WINDOWSNT
fe03522b
RS		 773 /* Waits for process completion */
774 pid = _spawnlp (_P_WAIT, sh, sh, NULL);
775 if (pid == -1)
776 write (1, "Can't execute subshell", 22);
777
778 take_console ();
779#else /* not WINDOWSNT */
86a5659e
JB		 780 execlp (sh, sh, 0);
781 write (1, "Can't execute subshell", 22);
782 _exit (1);
fe03522b 783#endif /* not WINDOWSNT */
207bdbdb 784#endif /* not MSDOS */
86a5659e
JB		 785 }
786
787 save_signal_handlers (saved_handlers);
ffafc793 788 synch_process_alive = 1;
7964ba9e 789#ifndef MSDOS
86a5659e 790 wait_for_termination (pid);
7964ba9e 791#endif
86a5659e 792 restore_signal_handlers (saved_handlers);
a0932daa 793#endif /* !VMS */
86a5659e
JB		 794}
795
796save_signal_handlers (saved_handlers)
797 struct save_signal *saved_handlers;
798{
799 while (saved_handlers->code)
800 {
508b171c
JA		 801 saved_handlers->handler
802 = (SIGTYPE (*) ()) signal (saved_handlers->code, SIG_IGN);
86a5659e
JB		 803 saved_handlers++;
804 }
805}
806
807restore_signal_handlers (saved_handlers)
808 struct save_signal *saved_handlers;
809{
810 while (saved_handlers->code)
811 {
812 signal (saved_handlers->code, saved_handlers->handler);
813 saved_handlers++;
814 }
815}
816\f
817#ifdef F_SETFL
818
819int old_fcntl_flags;
820
23dab951
RS		 821init_sigio (fd)
822 int fd;
86a5659e
JB		 823{
824#ifdef FASYNC
23dab951
RS		 825 old_fcntl_flags = fcntl (fd, F_GETFL, 0) & ~FASYNC;
826 fcntl (fd, F_SETFL, old_fcntl_flags | FASYNC);
86a5659e 827#endif
23dab951 828 interrupts_deferred = 0;
86a5659e
JB		 829}
830
831reset_sigio ()
832{
833 unrequest_sigio ();
834}
835
eb8c3be9 836#ifdef FASYNC /* F_SETFL does not imply existence of FASYNC */
86a5659e
JB		 837
838request_sigio ()
839{
23dab951
RS		 840 if (read_socket_hook)
841 return;
842
86a5659e 843#ifdef SIGWINCH
e065a56e 844 sigunblock (sigmask (SIGWINCH));
86a5659e 845#endif
64e971c3 846 fcntl (input_fd, F_SETFL, old_fcntl_flags | FASYNC);
86a5659e
JB		 847
848 interrupts_deferred = 0;
849}
850
851unrequest_sigio ()
852{
23dab951
RS		 853 if (read_socket_hook)
854 return;
855
86a5659e 856#ifdef SIGWINCH
e065a56e 857 sigblock (sigmask (SIGWINCH));
86a5659e 858#endif
64e971c3 859 fcntl (input_fd, F_SETFL, old_fcntl_flags);
86a5659e
JB		 860 interrupts_deferred = 1;
861}
862
863#else /* no FASYNC */
864#ifdef STRIDE /* Stride doesn't have FASYNC - use FIOASYNC */
865
866request_sigio ()
867{
868 int on = 1;
23dab951
RS		 869
870 if (read_socket_hook)
871 return;
872
64e971c3 873 ioctl (input_fd, FIOASYNC, &on);
86a5659e
JB		 874 interrupts_deferred = 0;
875}
876
877unrequest_sigio ()
878{
879 int off = 0;
880
23dab951
RS		 881 if (read_socket_hook)
882 return;
883
64e971c3 884 ioctl (input_fd, FIOASYNC, &off);
86a5659e
JB		 885 interrupts_deferred = 1;
886}
887
888#else /* not FASYNC, not STRIDE */
889
25ab68af
RS		 890#ifdef _CX_UX
891
892#include <termios.h>
893
894request_sigio ()
895{
896 int on = 1;
897 sigset_t st;
898
23dab951
RS		 899 if (read_socket_hook)
900 return;
901
25ab68af
RS		 902 sigemptyset(&st);
903 sigaddset(&st, SIGIO);
904 ioctl (input_fd, FIOASYNC, &on);
905 interrupts_deferred = 0;
906 sigprocmask(SIG_UNBLOCK, &st, (sigset_t *)0);
907}
908
909unrequest_sigio ()
910{
911 int off = 0;
912
23dab951
RS		 913 if (read_socket_hook)
914 return;
915
25ab68af
RS		 916 ioctl (input_fd, FIOASYNC, &off);
917 interrupts_deferred = 1;
918}
919
920#else /* ! _CX_UX */
921
86a5659e
JB		 922request_sigio ()
923{
23dab951
RS		 924 if (read_socket_hook)
925 return;
926
86a5659e
JB		 927 croak ("request_sigio");
928}
929
930unrequest_sigio ()
931{
23dab951
RS		 932 if (read_socket_hook)
933 return;
934
86a5659e
JB		 935 croak ("unrequest_sigio");
936}
937
25ab68af 938#endif /* _CX_UX */
86a5659e
JB		 939#endif /* STRIDE */
940#endif /* FASYNC */
941#endif /* F_SETFL */
942\f
9ae8f997
JB		 943/* Saving and restoring the process group of Emacs's terminal. */
944
0ba73609 945#ifdef BSD_PGRPS
9ae8f997
JB		 946
947/* The process group of which Emacs was a member when it initially
948 started.
949
950 If Emacs was in its own process group (i.e. inherited_pgroup ==
951 getpid ()), then we know we're running under a shell with job
952 control (Emacs would never be run as part of a pipeline).
953 Everything is fine.
954
955 If Emacs was not in its own process group, then we know we're
956 running under a shell (or a caller) that doesn't know how to
957 separate itself from Emacs (like sh). Emacs must be in its own
958 process group in order to receive SIGIO correctly. In this
959 situation, we put ourselves in our own pgroup, forcibly set the
960 tty's pgroup to our pgroup, and make sure to restore and reinstate
961 the tty's pgroup just like any other terminal setting. If
962 inherited_group was not the tty's pgroup, then we'll get a
963 SIGTTmumble when we try to change the tty's pgroup, and a CONT if
964 it goes foreground in the future, which is what should happen. */
965int inherited_pgroup;
966
967/* Split off the foreground process group to Emacs alone.
968 When we are in the foreground, but not started in our own process
969 group, redirect the TTY to point to our own process group. We need
970 to be in our own process group to receive SIGIO properly. */
971narrow_foreground_group ()
972{
973 int me = getpid ();
974
975 setpgrp (0, inherited_pgroup);
976 if (inherited_pgroup != me)
64e971c3 977 EMACS_SET_TTY_PGRP (input_fd, &me);
9ae8f997
JB		 978 setpgrp (0, me);
979}
980
981/* Set the tty to our original foreground group. */
982widen_foreground_group ()
983{
984 if (inherited_pgroup != getpid ())
64e971c3 985 EMACS_SET_TTY_PGRP (input_fd, &inherited_pgroup);
9ae8f997
JB		 986 setpgrp (0, inherited_pgroup);
987}
988
0ba73609 989#endif /* BSD_PGRPS */
9ae8f997 990\f
68936329
JB		 991/* Getting and setting emacs_tty structures. */
992
993/* Set *TC to the parameters associated with the terminal FD.
994 Return zero if all's well, or -1 if we ran into an error we
995 couldn't deal with. */
996int
997emacs_get_tty (fd, settings)
998 int fd;
999 struct emacs_tty *settings;
1000{
1001 /* Retrieve the primary parameters - baud rate, character size, etcetera. */
1002#ifdef HAVE_TCATTR
1003 /* We have those nifty POSIX tcmumbleattr functions. */
1004 if (tcgetattr (fd, &settings->main) < 0)
1005 return -1;
1006
1007#else
1008#ifdef HAVE_TERMIO
1009 /* The SYSV-style interface? */
1010 if (ioctl (fd, TCGETA, &settings->main) < 0)
1011 return -1;
1012
1013#else
1014#ifdef VMS
1015 /* Vehemently Monstrous System? :-) */
1016 if (! (SYS$QIOW (0, fd, IO$_SENSEMODE, settings, 0, 0,
1017 &settings->main.class, 12, 0, 0, 0, 0)
1018 & 1))
1019 return -1;
1020
1021#else
fe03522b 1022#ifndef DOS_NT
68936329
JB		 1023 /* I give up - I hope you have the BSD ioctls. */
1024 if (ioctl (fd, TIOCGETP, &settings->main) < 0)
1025 return -1;
fe03522b 1026#endif /* not DOS_NT */
68936329
JB		 1027#endif
1028#endif
1029#endif
1030
1031 /* Suivant - Do we have to get struct ltchars data? */
50b8cf60 1032#ifdef HAVE_LTCHARS
68936329
JB		 1033 if (ioctl (fd, TIOCGLTC, &settings->ltchars) < 0)
1034 return -1;
1035#endif
1036
1037 /* How about a struct tchars and a wordful of lmode bits? */
50b8cf60 1038#ifdef HAVE_TCHARS
68936329
JB		 1039 if (ioctl (fd, TIOCGETC, &settings->tchars) < 0
1040 || ioctl (fd, TIOCLGET, &settings->lmode) < 0)
1041 return -1;
1042#endif
1043
1044 /* We have survived the tempest. */
1045 return 0;
1046}
1047
1048
1049/* Set the parameters of the tty on FD according to the contents of
394049ec 1050 *SETTINGS. If FLUSHP is non-zero, we discard input.
68936329 1051 Return 0 if all went well, and -1 if anything failed. */
394049ec 1052
68936329 1053int
394049ec 1054emacs_set_tty (fd, settings, flushp)
68936329
JB		 1055 int fd;
1056 struct emacs_tty *settings;
394049ec 1057 int flushp;
68936329
JB		 1058{
1059 /* Set the primary parameters - baud rate, character size, etcetera. */
1060#ifdef HAVE_TCATTR
e6cc3307 1061 int i;
68936329
JB		 1062 /* We have those nifty POSIX tcmumbleattr functions.
1063 William J. Smith <wjs@wiis.wang.com> writes:
1064 "POSIX 1003.1 defines tcsetattr() to return success if it was
1065 able to perform any of the requested actions, even if some
1066 of the requested actions could not be performed.
1067 We must read settings back to ensure tty setup properly.
1068 AIX requires this to keep tty from hanging occasionally." */
eb8c3be9 1069 /* This make sure that we don't loop indefinitely in here. */
e6cc3307 1070 for (i = 0 ; i < 10 ; i++)
394049ec 1071 if (tcsetattr (fd, flushp ? TCSAFLUSH : TCSADRAIN, &settings->main) < 0)
68936329
JB		 1072 {
1073 if (errno == EINTR)
1074 continue;
1075 else
1076 return -1;
1077 }
1078 else
1079 {
1080 struct termios new;
1081
1082 /* Get the current settings, and see if they're what we asked for. */
1083 tcgetattr (fd, &new);
e6cc3307
RS		 1084 /* We cannot use memcmp on the whole structure here because under
1085 * aix386 the termios structure has some reserved field that may
1086 * not be filled in.
1087 */
1088 if ( new.c_iflag == settings->main.c_iflag
1089 && new.c_oflag == settings->main.c_oflag
1090 && new.c_cflag == settings->main.c_cflag
1091 && new.c_lflag == settings->main.c_lflag
1092 && memcmp(new.c_cc, settings->main.c_cc, NCCS) == 0)
68936329 1093 break;
e6cc3307
RS		 1094 else
1095 continue;
68936329
JB		 1096 }
1097
1098#else
1099#ifdef HAVE_TERMIO
1100 /* The SYSV-style interface? */
394049ec 1101 if (ioctl (fd, flushp ? TCSETAF : TCSETAW, &settings->main) < 0)
68936329
JB		 1102 return -1;
1103
1104#else
1105#ifdef VMS
1106 /* Vehemently Monstrous System? :-) */
1107 if (! (SYS$QIOW (0, fd, IO$_SETMODE, &input_iosb, 0, 0,
1108 &settings->main.class, 12, 0, 0, 0, 0)
1109 & 1))
1110 return -1;
1111
1112#else
fe03522b 1113#ifndef DOS_NT
68936329 1114 /* I give up - I hope you have the BSD ioctls. */
394049ec 1115 if (ioctl (fd, (flushp) ? TIOCSETP : TIOCSETN, &settings->main) < 0)
68936329 1116 return -1;
fe03522b 1117#endif /* not DOS_NT */
68936329
JB		 1118
1119#endif
1120#endif
1121#endif
1122
1123 /* Suivant - Do we have to get struct ltchars data? */
50b8cf60 1124#ifdef HAVE_LTCHARS
68936329
JB		 1125 if (ioctl (fd, TIOCSLTC, &settings->ltchars) < 0)
1126 return -1;
1127#endif
1128
1129 /* How about a struct tchars and a wordful of lmode bits? */
50b8cf60 1130#ifdef HAVE_TCHARS
68936329
JB		 1131 if (ioctl (fd, TIOCSETC, &settings->tchars) < 0
1132 || ioctl (fd, TIOCLSET, &settings->lmode) < 0)
1133 return -1;
1134#endif
1135
1136 /* We have survived the tempest. */
1137 return 0;
1138}
1139
1140\f
91bac16a
JB		 1141/* The initial tty mode bits */
1142struct emacs_tty old_tty;
86a5659e 1143
7e32a4fb
KH		 1144/* 1 if we have been through init_sys_modes. */
1145int term_initted;
1146
1147/* 1 if outer tty status has been recorded. */
1148int old_tty_valid;
86a5659e 1149
91bac16a
JB		 1150#ifdef BSD4_1
1151/* BSD 4.1 needs to keep track of the lmode bits in order to start
1152 sigio. */
1153int lmode;
1154#endif
1155
46f2fdac 1156#ifndef F_SETOWN_BUG
86a5659e
JB		 1157#ifdef F_SETOWN
1158int old_fcntl_owner;
1159#endif /* F_SETOWN */
46f2fdac 1160#endif /* F_SETOWN_BUG */
86a5659e 1161
86a5659e
JB		 1162/* This may also be defined in stdio,
1163 but if so, this does no harm,
1164 and using the same name avoids wasting the other one's space. */
1165
1166#if defined (USG) || defined (DGUX)
1167unsigned char _sobuf[BUFSIZ+8];
1168#else
1169char _sobuf[BUFSIZ];
1170#endif
1171
50b8cf60 1172#ifdef HAVE_LTCHARS
86a5659e
JB		 1173static struct ltchars new_ltchars = {-1,-1,-1,-1,-1,-1};
1174#endif
50b8cf60 1175#ifdef HAVE_TCHARS
86a5659e
JB		 1176 static struct tchars new_tchars = {-1,-1,-1,-1,-1,-1};
1177#endif
1178
1179init_sys_modes ()
1180{
91bac16a
JB		 1181 struct emacs_tty tty;
1182
86a5659e
JB		 1183#ifdef VMS
1184#if 0
1185 static int oob_chars[2] = {0, 1 << 7}; /* catch C-g's */
1186 extern int (*interrupt_signal) ();
1187#endif
1188#endif
1189
1190 if (noninteractive)
1191 return;
1192
1193#ifdef VMS
1194 if (!input_ef)
1195 input_ef = get_kbd_event_flag ();
1196 /* LIB$GET_EF (&input_ef); */
1197 SYS$CLREF (input_ef);
1198 waiting_for_ast = 0;
1199 if (!timer_ef)
1200 timer_ef = get_timer_event_flag ();
1201 /* LIB$GET_EF (&timer_ef); */
1202 SYS$CLREF (timer_ef);
210b2b4f 1203#if 0
86a5659e
JB		 1204 if (!process_ef)
1205 {
1206 LIB$GET_EF (&process_ef);
1207 SYS$CLREF (process_ef);
1208 }
1209 if (input_ef / 32 != process_ef / 32)
1210 croak ("Input and process event flags in different clusters.");
210b2b4f 1211#endif
86a5659e 1212 if (input_ef / 32 != timer_ef / 32)
210b2b4f
JB		 1213 croak ("Input and timer event flags in different clusters.");
1214#if 0
86a5659e
JB		 1215 input_eflist = ((unsigned) 1 << (input_ef % 32)) |
1216 ((unsigned) 1 << (process_ef % 32));
210b2b4f 1217#endif
86a5659e
JB		 1218 timer_eflist = ((unsigned) 1 << (input_ef % 32)) |
1219 ((unsigned) 1 << (timer_ef % 32));
86a5659e
JB		 1220#ifndef VMS4_4
1221 sys_access_reinit ();
1222#endif
86a5659e 1223#endif /* not VMS */
91bac16a 1224
0ba73609 1225#ifdef BSD_PGRPS
9ae8f997
JB		 1226 if (! read_socket_hook && EQ (Vwindow_system, Qnil))
1227 narrow_foreground_group ();
1228#endif
1229
23cafe43 1230#ifdef HAVE_WINDOW_SYSTEM
87485d6f
MW		 1231 /* Emacs' window system on MSDOG uses the `internal terminal' and therefore
1232 needs the initialization code below. */
86a5659e 1233 if (!read_socket_hook && EQ (Vwindow_system, Qnil))
87485d6f 1234#endif
86a5659e 1235 {
23dab951
RS		 1236 EMACS_GET_TTY (input_fd, &old_tty);
1237
7e32a4fb
KH		 1238 old_tty_valid = 1;
1239
91bac16a 1240 tty = old_tty;
86a5659e 1241
31be8d24 1242#if defined (HAVE_TERMIO) || defined (HAVE_TERMIOS)
421dd92f
RS		 1243#ifdef DGUX
1244 /* This allows meta to be sent on 8th bit. */
1245 tty.main.c_iflag &= ~INPCK; /* don't check input for parity */
1246#endif
91bac16a
JB		 1247 tty.main.c_iflag |= (IGNBRK); /* Ignore break condition */
1248 tty.main.c_iflag &= ~ICRNL; /* Disable map of CR to NL on input */
86a5659e 1249#ifdef ISTRIP
91bac16a 1250 tty.main.c_iflag &= ~ISTRIP; /* don't strip 8th bit on input */
86a5659e 1251#endif
91bac16a
JB		 1252 tty.main.c_lflag &= ~ECHO; /* Disable echo */
1253 tty.main.c_lflag &= ~ICANON; /* Disable erase/kill processing */
e2b40c23 1254#ifdef IEXTEN
b26bc18b 1255 tty.main.c_lflag &= ~IEXTEN; /* Disable other editing characters. */
e2b40c23 1256#endif
91bac16a 1257 tty.main.c_lflag |= ISIG; /* Enable signals */
86a5659e
JB		 1258 if (flow_control)
1259 {
91bac16a 1260 tty.main.c_iflag |= IXON; /* Enable start/stop output control */
86a5659e 1261#ifdef IXANY
91bac16a 1262 tty.main.c_iflag &= ~IXANY;
86a5659e
JB		 1263#endif /* IXANY */
1264 }
1265 else
91bac16a
JB		 1266 tty.main.c_iflag &= ~IXON; /* Disable start/stop output control */
1267 tty.main.c_oflag &= ~ONLCR; /* Disable map of NL to CR-NL
1268 on output */
1269 tty.main.c_oflag &= ~TAB3; /* Disable tab expansion */
86a5659e
JB		 1270#ifdef CS8
1271 if (meta_key)
1272 {
91bac16a
JB		 1273 tty.main.c_cflag |= CS8; /* allow 8th bit on input */
1274 tty.main.c_cflag &= ~PARENB;/* Don't check parity */
86a5659e
JB		 1275 }
1276#endif
91bac16a 1277 tty.main.c_cc[VINTR] = quit_char; /* C-g (usually) gives SIGINT */
86a5659e
JB		 1278 /* Set up C-g for both SIGQUIT and SIGINT.
1279 We don't know which we will get, but we handle both alike
1280 so which one it really gives us does not matter. */
91bac16a
JB		 1281 tty.main.c_cc[VQUIT] = quit_char;
1282 tty.main.c_cc[VMIN] = 1; /* Input should wait for at least 1 char */
1283 tty.main.c_cc[VTIME] = 0; /* no matter how long that takes. */
86a5659e 1284#ifdef VSWTCH
e2b40c23 1285 tty.main.c_cc[VSWTCH] = CDISABLE; /* Turn off shell layering use
91bac16a 1286 of C-z */
86a5659e
JB		 1287#endif /* VSWTCH */
1288#if defined (mips) || defined (HAVE_TCATTR)
86a5659e 1289#ifdef VSUSP
e2b40c23 1290 tty.main.c_cc[VSUSP] = CDISABLE; /* Turn off mips handling of C-z. */
86a5659e
JB		 1291#endif /* VSUSP */
1292#ifdef V_DSUSP
e2b40c23 1293 tty.main.c_cc[V_DSUSP] = CDISABLE; /* Turn off mips handling of C-y. */
86a5659e 1294#endif /* V_DSUSP */
e2b40c23
RS		 1295#ifdef VDSUSP /* Some systems have VDSUSP, some have V_DSUSP. */
1296 tty.main.c_cc[VDSUSP] = CDISABLE;
1297#endif /* VDSUSP */
92c995de
RS		 1298#ifdef VLNEXT
1299 tty.main.c_cc[VLNEXT] = CDISABLE;
1300#endif /* VLNEXT */
1301#ifdef VREPRINT
1302 tty.main.c_cc[VREPRINT] = CDISABLE;
1303#endif /* VREPRINT */
1304#ifdef VWERASE
1305 tty.main.c_cc[VWERASE] = CDISABLE;
1306#endif /* VWERASE */
1307#ifdef VDISCARD
1308 tty.main.c_cc[VDISCARD] = CDISABLE;
1309#endif /* VDISCARD */
421dd92f
RS		 1310#ifdef VSTART
1311 tty.main.c_cc[VSTART] = CDISABLE;
1312#endif /* VSTART */
1313#ifdef VSTOP
1314 tty.main.c_cc[VSTOP] = CDISABLE;
1315#endif /* VSTOP */
86a5659e 1316#endif /* mips or HAVE_TCATTR */
441f6399 1317#ifdef SET_LINE_DISCIPLINE
ea5a0917 1318 /* Need to explicitly request TERMIODISC line discipline or
441f6399
RS		 1319 Ultrix's termios does not work correctly. */
1320 tty.main.c_line = SET_LINE_DISCIPLINE;
1321#endif
86a5659e
JB		 1322#ifdef AIX
1323#ifndef IBMR2AIX
441f6399 1324 /* AIX enhanced edit loses NULs, so disable it. */
91bac16a
JB		 1325 tty.main.c_line = 0;
1326 tty.main.c_iflag &= ~ASCEDIT;
86a5659e 1327#else
91bac16a
JB		 1328 tty.main.c_cc[VSTRT] = 255;
1329 tty.main.c_cc[VSTOP] = 255;
1330 tty.main.c_cc[VSUSP] = 255;
1331 tty.main.c_cc[VDSUSP] = 255;
86a5659e
JB		 1332#endif /* IBMR2AIX */
1333 /* Also, PTY overloads NUL and BREAK.
1334 don't ignore break, but don't signal either, so it looks like NUL.
1335 This really serves a purpose only if running in an XTERM window
1336 or via TELNET or the like, but does no harm elsewhere. */
91bac16a
JB		 1337 tty.main.c_iflag &= ~IGNBRK;
1338 tty.main.c_iflag &= ~BRKINT;
86a5659e
JB		 1339#endif
1340#else /* if not HAVE_TERMIO */
1341#ifdef VMS
91bac16a 1342 tty.main.tt_char |= TT$M_NOECHO;
86a5659e 1343 if (meta_key)
986ffb24 1344 tty.main.tt_char |= TT$M_EIGHTBIT;
86a5659e 1345 if (flow_control)
91bac16a 1346 tty.main.tt_char |= TT$M_TTSYNC;
86a5659e 1347 else
91bac16a
JB		 1348 tty.main.tt_char &= ~TT$M_TTSYNC;
1349 tty.main.tt2_char |= TT2$M_PASTHRU | TT2$M_XON;
86a5659e 1350#else /* not VMS (BSD, that is) */
fe03522b 1351#ifndef DOS_NT
91bac16a 1352 tty.main.sg_flags &= ~(ECHO | CRMOD | XTABS);
86a5659e 1353 if (meta_key)
91bac16a
JB		 1354 tty.main.sg_flags |= ANYP;
1355 tty.main.sg_flags |= interrupt_input ? RAW : CBREAK;
fe03522b 1356#endif /* not DOS_NT */
86a5659e
JB		 1357#endif /* not VMS (BSD, that is) */
1358#endif /* not HAVE_TERMIO */
1359
91bac16a
JB		 1360 /* If going to use CBREAK mode, we must request C-g to interrupt
1361 and turn off start and stop chars, etc. If not going to use
1362 CBREAK mode, do this anyway so as to turn off local flow
1363 control for user coming over network on 4.2; in this case,
1364 only t_stopc and t_startc really matter. */
1365#ifndef HAVE_TERMIO
50b8cf60 1366#ifdef HAVE_TCHARS
91bac16a
JB		 1367 /* Note: if not using CBREAK mode, it makes no difference how we
1368 set this */
1369 tty.tchars = new_tchars;
1370 tty.tchars.t_intrc = quit_char;
1371 if (flow_control)
1372 {
1373 tty.tchars.t_startc = '\021';
1374 tty.tchars.t_stopc = '\023';
1375 }
1376
91bac16a 1377 tty.lmode = LDECCTQ | LLITOUT | LPASS8 | LNOFLSH | old_tty.lmode;
37fd7901
JB		 1378#ifdef ultrix
1379 /* Under Ultrix 4.2a, leaving this out doesn't seem to hurt
1380 anything, and leaving it in breaks the meta key. Go figure. */
1381 tty.lmode &= ~LLITOUT;
1382#endif
91bac16a
JB		 1383
1384#ifdef BSD4_1
1385 lmode = tty.lmode;
1386#endif
1387
50b8cf60 1388#endif /* HAVE_TCHARS */
91bac16a
JB		 1389#endif /* not HAVE_TERMIO */
1390
50b8cf60 1391#ifdef HAVE_LTCHARS
91bac16a 1392 tty.ltchars = new_ltchars;
50b8cf60 1393#endif /* HAVE_LTCHARS */
207bdbdb 1394#ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida, MW Aug 1993 */
87485d6f
MW		 1395 if (!term_initted)
1396 internal_terminal_init ();
207bdbdb
RS		 1397 dos_ttraw ();
1398#endif
91bac16a
JB		 1399
1400 EMACS_SET_TTY (input_fd, &tty, 0);
86a5659e
JB		 1401
1402 /* This code added to insure that, if flow-control is not to be used,
0137dbf7 1403 we have an unlocked terminal at the start. */
91bac16a 1404
86a5659e 1405#ifdef TCXONC
64e971c3 1406 if (!flow_control) ioctl (input_fd, TCXONC, 1);
86a5659e
JB		 1407#endif
1408#ifndef APOLLO
1409#ifdef TIOCSTART
64e971c3 1410 if (!flow_control) ioctl (input_fd, TIOCSTART, 0);
86a5659e
JB		 1411#endif
1412#endif
1413
d228f207 1414#if defined (HAVE_TERMIOS) || defined (HPUX9)
51417996 1415#ifdef TCOON
d228f207
RS		 1416 if (!flow_control) tcflow (input_fd, TCOON);
1417#endif
51417996 1418#endif
d228f207 1419
b97ab886 1420#ifdef AIXHFT
86a5659e
JB		 1421 hft_init ();
1422#ifdef IBMR2AIX
1423 {
1424 /* IBM's HFT device usually thinks a ^J should be LF/CR. We need it
1425 to be only LF. This is the way that is done. */
1426 struct termio tty;
1427
1428 if (ioctl (1, HFTGETID, &tty) != -1)
1429 write (1, "\033[20l", 5);
1430 }
1431#endif
b97ab886 1432#endif /* AIXHFT */
86a5659e 1433
86a5659e
JB		 1434#ifdef VMS
1435/* Appears to do nothing when in PASTHRU mode.
91bac16a 1436 SYS$QIOW (0, input_fd, IO$_SETMODE|IO$M_OUTBAND, 0, 0, 0,
86a5659e
JB		 1437 interrupt_signal, oob_chars, 0, 0, 0, 0);
1438*/
1439 queue_kbd_input (0);
1440#endif /* VMS */
1441 }
1442
1443#ifdef F_SETFL
46f2fdac 1444#ifndef F_SETOWN_BUG
eb8c3be9 1445#ifdef F_GETOWN /* F_SETFL does not imply existence of F_GETOWN */
d6a9be45
RS		 1446 if (interrupt_input
1447 && ! read_socket_hook && EQ (Vwindow_system, Qnil))
86a5659e 1448 {
64e971c3
RS		 1449 old_fcntl_owner = fcntl (input_fd, F_GETOWN, 0);
1450 fcntl (input_fd, F_SETOWN, getpid ());
23dab951 1451 init_sigio (input_fd);
86a5659e
JB		 1452 }
1453#endif /* F_GETOWN */
46f2fdac 1454#endif /* F_SETOWN_BUG */
86a5659e
JB		 1455#endif /* F_SETFL */
1456
1457#ifdef BSD4_1
1458 if (interrupt_input)
23dab951 1459 init_sigio (input_fd);
86a5659e
JB		 1460#endif
1461
1462#ifdef VMS /* VMS sometimes has this symbol but lacks setvbuf. */
1463#undef _IOFBF
1464#endif
1465#ifdef _IOFBF
1466 /* This symbol is defined on recent USG systems.
1467 Someone says without this call USG won't really buffer the file
1468 even with a call to setbuf. */
1469 setvbuf (stdout, _sobuf, _IOFBF, sizeof _sobuf);
1470#else
1471 setbuf (stdout, _sobuf);
1472#endif
23cafe43 1473#ifdef HAVE_WINDOW_SYSTEM
c4295188
KS		 1474 /* Emacs' window system on MSDOG uses the `internal terminal' and therefore
1475 needs the initialization code below. */
4b311aaf 1476 if (! read_socket_hook && EQ (Vwindow_system, Qnil))
c4295188 1477#endif
4b311aaf
RS		 1478 set_terminal_modes ();
1479
86a5659e
JB		 1480 if (term_initted && no_redraw_on_reenter)
1481 {
1482 if (display_completed)
1483 direct_output_forward_char (0);
1484 }
1485 else
1486 {
0137dbf7
JB		 1487 frame_garbaged = 1;
1488#ifdef MULTI_FRAME
1489 if (FRAMEP (Vterminal_frame))
1490 FRAME_GARBAGED_P (XFRAME (Vterminal_frame)) = 1;
86a5659e
JB		 1491#endif
1492 }
91bac16a 1493
86a5659e
JB		 1494 term_initted = 1;
1495}
1496
1497/* Return nonzero if safe to use tabs in output.
1498 At the time this is called, init_sys_modes has not been done yet. */
1499
1500tabs_safe_p ()
1501{
91bac16a
JB		 1502 struct emacs_tty tty;
1503
1504 EMACS_GET_TTY (input_fd, &tty);
1505 return EMACS_TTY_TABS_OK (&tty);
86a5659e 1506}
73d5358f 1507\f
86a5659e 1508/* Get terminal size from system.
73d5358f
RS		 1509 Store number of lines into *HEIGHTP and width into *WIDTHP.
1510 We store 0 if there's no valid information. */
86a5659e 1511
0137dbf7 1512get_frame_size (widthp, heightp)
86a5659e
JB		 1513 int *widthp, *heightp;
1514{
86a5659e 1515
86a5659e 1516#ifdef TIOCGWINSZ
91bac16a
JB		 1517
1518 /* BSD-style. */
86a5659e 1519 struct winsize size;
91bac16a
JB		 1520
1521 if (ioctl (input_fd, TIOCGWINSZ, &size) == -1)
1522 *widthp = *heightp = 0;
1523 else
1524 {
1525 *widthp = size.ws_col;
1526 *heightp = size.ws_row;
1527 }
1528
1529#else
1530#ifdef TIOCGSIZE
1531
1532 /* SunOS - style. */
1533 struct ttysize size;
1534
1535 if (ioctl (input_fd, TIOCGSIZE, &size) == -1)
1536 *widthp = *heightp = 0;
1537 else
1538 {
1539 *widthp = size.ts_cols;
1540 *heightp = size.ts_lines;
1541 }
1542
1543#else
86a5659e 1544#ifdef VMS
91bac16a
JB		 1545
1546 struct sensemode tty;
1547
1548 SYS$QIOW (0, input_fd, IO$_SENSEMODE, &tty, 0, 0,
86a5659e
JB		 1549 &tty.class, 12, 0, 0, 0, 0);
1550 *widthp = tty.scr_wid;
1551 *heightp = tty.scr_len;
91bac16a 1552
207bdbdb
RS		 1553#else
1554#ifdef MSDOS
1555 *widthp = ScreenCols ();
1556 *heightp = ScreenRows ();
86a5659e
JB		 1557#else /* system doesn't know size */
1558 *widthp = 0;
1559 *heightp = 0;
207bdbdb 1560#endif
91bac16a
JB		 1561
1562#endif /* not VMS */
1563#endif /* not SunOS-style */
1564#endif /* not BSD-style */
86a5659e 1565}
91bac16a 1566
73d5358f
RS		 1567/* Set the logical window size associated with descriptor FD
1568 to HEIGHT and WIDTH. This is used mainly with ptys. */
1569
1570int
1571set_window_size (fd, height, width)
1572 int fd, height, width;
1573{
1574#ifdef TIOCSWINSZ
1575
1576 /* BSD-style. */
1577 struct winsize size;
1578 size.ws_row = height;
1579 size.ws_col = width;
1580
1581 if (ioctl (fd, TIOCSWINSZ, &size) == -1)
1582 return 0; /* error */
1583 else
1584 return 1;
1585
1586#else
1587#ifdef TIOCSSIZE
1588
1589 /* SunOS - style. */
1590 struct ttysize size;
1591 size.ts_lines = height;
1592 size.ts_cols = width;
1593
1594 if (ioctl (fd, TIOCGSIZE, &size) == -1)
1595 return 0;
1596 else
1597 return 1;
1598#else
1599 return -1;
1600#endif /* not SunOS-style */
1601#endif /* not BSD-style */
1602}
1603
86a5659e 1604\f
91bac16a 1605/* Prepare the terminal for exiting Emacs; move the cursor to the
0137dbf7 1606 bottom of the frame, turn off interrupt-driven I/O, etc. */
86a5659e
JB		 1607reset_sys_modes ()
1608{
1609 if (noninteractive)
1610 {
1611 fflush (stdout);
1612 return;
1613 }
1614 if (!term_initted)
1615 return;
23cafe43 1616#ifdef HAVE_WINDOW_SYSTEM
87485d6f
MW		 1617 /* Emacs' window system on MSDOG uses the `internal terminal' and therefore
1618 needs the clean-up code below. */
86a5659e
JB		 1619 if (read_socket_hook || !EQ (Vwindow_system, Qnil))
1620 return;
87485d6f 1621#endif
0137dbf7
JB		 1622 cursor_to (FRAME_HEIGHT (selected_frame) - 1, 0);
1623 clear_end_of_line (FRAME_WIDTH (selected_frame));
86a5659e 1624 /* clear_end_of_line may move the cursor */
0137dbf7 1625 cursor_to (FRAME_HEIGHT (selected_frame) - 1, 0);
b97ab886 1626#if defined (IBMR2AIX) && defined (AIXHFT)
86a5659e
JB		 1627 {
1628 /* HFT devices normally use ^J as a LF/CR. We forced it to
1629 do the LF only. Now, we need to reset it. */
1630 struct termio tty;
1631
1632 if (ioctl (1, HFTGETID, &tty) != -1)
1633 write (1, "\033[20h", 5);
1634 }
1635#endif
1636
1637 reset_terminal_modes ();
1638 fflush (stdout);
1639#ifdef BSD
1640#ifndef BSD4_1
1641 /* Avoid possible loss of output when changing terminal modes. */
1642 fsync (fileno (stdout));
1643#endif
1644#endif
91bac16a 1645
86a5659e 1646#ifdef F_SETFL
46f2fdac 1647#ifndef F_SETOWN_BUG
eb8c3be9 1648#ifdef F_SETOWN /* F_SETFL does not imply existence of F_SETOWN */
86a5659e
JB		 1649 if (interrupt_input)
1650 {
1651 reset_sigio ();
64e971c3 1652 fcntl (input_fd, F_SETOWN, old_fcntl_owner);
86a5659e
JB		 1653 }
1654#endif /* F_SETOWN */
46f2fdac 1655#endif /* F_SETOWN_BUG */
a6b00318
KH		 1656#ifdef O_NDELAY
1657 fcntl (input_fd, F_SETFL, fcntl (input_fd, F_GETFL, 0) & ~O_NDELAY);
1658#endif
86a5659e
JB		 1659#endif /* F_SETFL */
1660#ifdef BSD4_1
1661 if (interrupt_input)
1662 reset_sigio ();
1663#endif /* BSD4_1 */
91bac16a 1664
7e32a4fb
KH		 1665 if (old_tty_valid)
1666 while (EMACS_SET_TTY (input_fd, &old_tty, 0) < 0 && errno == EINTR)
1667 ;
86a5659e 1668
207bdbdb
RS		 1669#ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */
1670 dos_ttcooked ();
1671#endif
1672
441f6399
RS		 1673#ifdef SET_LINE_DISCIPLINE
1674 /* Ultrix's termios *ignores* any line discipline except TERMIODISC.
1675 A different old line discipline is therefore not restored, yet.
1676 Restore the old line discipline by hand. */
1677 ioctl (0, TIOCSETD, &old_tty.main.c_line);
1678#endif
1679
b97ab886 1680#ifdef AIXHFT
86a5659e
JB		 1681 hft_reset ();
1682#endif
9ae8f997 1683
0ba73609 1684#ifdef BSD_PGRPS
9ae8f997
JB		 1685 widen_foreground_group ();
1686#endif
86a5659e
JB		 1687}
1688\f
1689#ifdef HAVE_PTYS
1690
1691/* Set up the proper status flags for use of a pty. */
1692
1693setup_pty (fd)
1694 int fd;
1695{
1696 /* I'm told that TOICREMOTE does not mean control chars
1697 "can't be sent" but rather that they don't have
1698 input-editing or signaling effects.
1699 That should be good, because we have other ways
1700 to do those things in Emacs.
1701 However, telnet mode seems not to work on 4.2.
1702 So TIOCREMOTE is turned off now. */
1703
1704 /* Under hp-ux, if TIOCREMOTE is turned on, some calls
1705 will hang. In particular, the "timeout" feature (which
1706 causes a read to return if there is no data available)
1707 does this. Also it is known that telnet mode will hang
1708 in such a way that Emacs must be stopped (perhaps this
1709 is the same problem).
1710
1711 If TIOCREMOTE is turned off, then there is a bug in
1712 hp-ux which sometimes loses data. Apparently the
1713 code which blocks the master process when the internal
1714 buffer fills up does not work. Other than this,
1715 though, everything else seems to work fine.
1716
1717 Since the latter lossage is more benign, we may as well
1718 lose that way. -- cph */
1719#ifdef FIONBIO
1720#ifdef SYSV_PTYS
1721 {
1722 int on = 1;
1723 ioctl (fd, FIONBIO, &on);
1724 }
1725#endif
1726#endif
1727#ifdef IBMRTAIX
1728 /* On AIX, the parent gets SIGHUP when a pty attached child dies. So, we */
1729 /* ignore SIGHUP once we've started a child on a pty. Note that this may */
1730 /* cause EMACS not to die when it should, i.e., when its own controlling */
1731 /* tty goes away. I've complained to the AIX developers, and they may */
1732 /* change this behavior, but I'm not going to hold my breath. */
1733 signal (SIGHUP, SIG_IGN);
1734#endif
1735}
1736#endif /* HAVE_PTYS */
1737\f
1738#ifdef VMS
1739
1740/* Assigning an input channel is done at the start of Emacs execution.
1741 This is called each time Emacs is resumed, also, but does nothing
1742 because input_chain is no longer zero. */
1743
1744init_vms_input ()
1745{
1746 int status;
1747
91bac16a 1748 if (input_fd == 0)
86a5659e 1749 {
91bac16a 1750 status = SYS$ASSIGN (&input_dsc, &input_fd, 0, 0);
86a5659e
JB		 1751 if (! (status & 1))
1752 LIB$STOP (status);
1753 }
1754}
1755
1756/* Deassigning the input channel is done before exiting. */
1757
1758stop_vms_input ()
1759{
91bac16a 1760 return SYS$DASSGN (input_fd);
86a5659e
JB		 1761}
1762
1763short input_buffer;
1764
1765/* Request reading one character into the keyboard buffer.
1766 This is done as soon as the buffer becomes empty. */
1767
1768queue_kbd_input ()
1769{
1770 int status;
210b2b4f
JB		 1771 extern kbd_input_ast ();
1772
86a5659e
JB		 1773 waiting_for_ast = 0;
1774 stop_input = 0;
91bac16a 1775 status = SYS$QIO (0, input_fd, IO$_READVBLK,
86a5659e
JB		 1776 &input_iosb, kbd_input_ast, 1,
1777 &input_buffer, 1, 0, terminator_mask, 0, 0);
1778}
1779
1780int input_count;
1781
1782/* Ast routine that is called when keyboard input comes in
1783 in accord with the SYS$QIO above. */
1784
1785kbd_input_ast ()
1786{
1787 register int c = -1;
1788 int old_errno = errno;
ffd56f97 1789 extern EMACS_TIME *input_available_clear_time;
86a5659e
JB		 1790
1791 if (waiting_for_ast)
1792 SYS$SETEF (input_ef);
1793 waiting_for_ast = 0;
1794 input_count++;
1795#ifdef ASTDEBUG
1796 if (input_count == 25)
1797 exit (1);
1798 printf ("Ast # %d,", input_count);
1799 printf (" iosb = %x, %x, %x, %x",
1800 input_iosb.offset, input_iosb.status, input_iosb.termlen,
1801 input_iosb.term);
1802#endif
1803 if (input_iosb.offset)
1804 {
1805 c = input_buffer;
1806#ifdef ASTDEBUG
1807 printf (", char = 0%o", c);
1808#endif
1809 }
1810#ifdef ASTDEBUG
1811 printf ("\n");
1812 fflush (stdout);
1813 sleep (1);
1814#endif
1815 if (! stop_input)
1816 queue_kbd_input ();
1817 if (c >= 0)
1818 {
1819 struct input_event e;
1820 e.kind = ascii_keystroke;
c81d47b4 1821 XSETINT (e.code, c);
c81d47b4 1822 XSETFRAME (e.frame_or_window, selected_frame);
86a5659e
JB		 1823 kbd_buffer_store_event (&e);
1824 }
ffd56f97
JB		 1825 if (input_available_clear_time)
1826 EMACS_SET_SECS_USECS (*input_available_clear_time, 0, 0);
86a5659e
JB		 1827 errno = old_errno;
1828}
1829
1830/* Wait until there is something in kbd_buffer. */
1831
1832wait_for_kbd_input ()
1833{
1834 extern int have_process_input, process_exited;
1835
1836 /* If already something, avoid doing system calls. */
1837 if (detect_input_pending ())
1838 {
1839 return;
1840 }
1841 /* Clear a flag, and tell ast routine above to set it. */
1842 SYS$CLREF (input_ef);
1843 waiting_for_ast = 1;
1844 /* Check for timing error: ast happened while we were doing that. */
1845 if (!detect_input_pending ())
1846 {
1847 /* No timing error: wait for flag to be set. */
1848 set_waiting_for_input (0);
1849 SYS$WFLOR (input_ef, input_eflist);
1850 clear_waiting_for_input (0);
1851 if (!detect_input_pending ())
1852 /* Check for subprocess input availability */
1853 {
1854 int dsp = have_process_input || process_exited;
1855
1856 SYS$CLREF (process_ef);
1857 if (have_process_input)
1858 process_command_input ();
1859 if (process_exited)
1860 process_exit ();
1861 if (dsp)
1862 {
1863 update_mode_lines++;
56b18525 1864 prepare_menu_bars ();
86a5659e
JB		 1865 redisplay_preserve_echo_area ();
1866 }
1867 }
1868 }
1869 waiting_for_ast = 0;
1870}
1871
1872/* Get rid of any pending QIO, when we are about to suspend
1873 or when we want to throw away pending input.
1874 We wait for a positive sign that the AST routine has run
1875 and therefore there is no I/O request queued when we return.
1876 SYS$SETAST is used to avoid a timing error. */
1877
1878end_kbd_input ()
1879{
1880#ifdef ASTDEBUG
1881 printf ("At end_kbd_input.\n");
1882 fflush (stdout);
1883 sleep (1);
1884#endif
1885 if (LIB$AST_IN_PROG ()) /* Don't wait if suspending from kbd_buffer_store_event! */
1886 {
91bac16a 1887 SYS$CANCEL (input_fd);
86a5659e
JB		 1888 return;
1889 }
1890
1891 SYS$SETAST (0);
1892 /* Clear a flag, and tell ast routine above to set it. */
1893 SYS$CLREF (input_ef);
1894 waiting_for_ast = 1;
1895 stop_input = 1;
91bac16a 1896 SYS$CANCEL (input_fd);
86a5659e
JB		 1897 SYS$SETAST (1);
1898 SYS$WAITFR (input_ef);
1899 waiting_for_ast = 0;
1900}
1901
1902/* Wait for either input available or time interval expiry. */
1903
1904input_wait_timeout (timeval)
1905 int timeval; /* Time to wait, in seconds */
1906{
1907 int time [2];
1908 static int zero = 0;
1909 static int large = -10000000;
1910
1911 LIB$EMUL (&timeval, &large, &zero, time); /* Convert to VMS format */
1912
1913 /* If already something, avoid doing system calls. */
1914 if (detect_input_pending ())
1915 {
1916 return;
1917 }
1918 /* Clear a flag, and tell ast routine above to set it. */
1919 SYS$CLREF (input_ef);
1920 waiting_for_ast = 1;
1921 /* Check for timing error: ast happened while we were doing that. */
1922 if (!detect_input_pending ())
1923 {
1924 /* No timing error: wait for flag to be set. */
1925 SYS$CANTIM (1, 0);
1926 if (SYS$SETIMR (timer_ef, time, 0, 1) & 1) /* Set timer */
1927 SYS$WFLOR (timer_ef, timer_eflist); /* Wait for timer expiry or input */
1928 }
1929 waiting_for_ast = 0;
1930}
1931
1932/* The standard `sleep' routine works some other way
1933 and it stops working if you have ever quit out of it.
1934 This one continues to work. */
1935
1936sys_sleep (timeval)
1937 int timeval;
1938{
1939 int time [2];
1940 static int zero = 0;
1941 static int large = -10000000;
1942
1943 LIB$EMUL (&timeval, &large, &zero, time); /* Convert to VMS format */
1944
1945 SYS$CANTIM (1, 0);
1946 if (SYS$SETIMR (timer_ef, time, 0, 1) & 1) /* Set timer */
1947 SYS$WAITFR (timer_ef); /* Wait for timer expiry only */
1948}
1949
23dab951
RS		 1950init_sigio (fd)
1951 int fd;
86a5659e
JB		 1952{
1953 request_sigio ();
1954}
1955
1956reset_sigio ()
1957{
1958 unrequest_sigio ();
1959}
1960
1961request_sigio ()
1962{
1963 croak ("request sigio");
1964}
1965
1966unrequest_sigio ()
1967{
1968 croak ("unrequest sigio");
1969}
1970
1971#endif /* VMS */
1972\f
1973/* Note that VMS compiler won't accept defined (CANNOT_DUMP). */
1974#ifndef CANNOT_DUMP
1975#define NEED_STARTS
1976#endif
1977
1978#ifndef SYSTEM_MALLOC
1979#ifndef NEED_STARTS
1980#define NEED_STARTS
1981#endif
1982#endif
1983
1984#ifdef NEED_STARTS
1985/* Some systems that cannot dump also cannot implement these. */
1986
1987/*
1988 * Return the address of the start of the text segment prior to
1989 * doing an unexec. After unexec the return value is undefined.
1990 * See crt0.c for further explanation and _start.
1991 *
1992 */
1993
260fe597 1994#ifndef HAVE_TEXT_START
86a5659e
JB		 1995char *
1996start_of_text ()
1997{
1998#ifdef TEXT_START
1999 return ((char *) TEXT_START);
2000#else
2001#ifdef GOULD
2002 extern csrt ();
2003 return ((char *) csrt);
2004#else /* not GOULD */
2005 extern int _start ();
2006 return ((char *) _start);
2007#endif /* GOULD */
2008#endif /* TEXT_START */
2009}
260fe597 2010#endif /* not HAVE_TEXT_START */
86a5659e
JB		 2011
2012/*
2013 * Return the address of the start of the data segment prior to
2014 * doing an unexec. After unexec the return value is undefined.
2015 * See crt0.c for further information and definition of data_start.
2016 *
2017 * Apparently, on BSD systems this is etext at startup. On
2018 * USG systems (swapping) this is highly mmu dependent and
2019 * is also dependent on whether or not the program is running
2020 * with shared text. Generally there is a (possibly large)
2021 * gap between end of text and start of data with shared text.
2022 *
2023 * On Uniplus+ systems with shared text, data starts at a
2024 * fixed address. Each port (from a given oem) is generally
2025 * different, and the specific value of the start of data can
2026 * be obtained via the UniPlus+ specific "uvar" system call,
2027 * however the method outlined in crt0.c seems to be more portable.
2028 *
2029 * Probably what will have to happen when a USG unexec is available,
2030 * at least on UniPlus, is temacs will have to be made unshared so
2031 * that text and data are contiguous. Then once loadup is complete,
2032 * unexec will produce a shared executable where the data can be
ea5a0917 2033 * at the normal shared text boundary and the startofdata variable
86a5659e
JB		 2034 * will be patched by unexec to the correct value.
2035 *
2036 */
2037
2038char *
2039start_of_data ()
2040{
2041#ifdef DATA_START
2042 return ((char *) DATA_START);
6c65530f
JB		 2043#else
2044#ifdef ORDINARY_LINK
2045 /*
2046 * This is a hack. Since we're not linking crt0.c or pre_crt0.c,
2047 * data_start isn't defined. We take the address of environ, which
2048 * is known to live at or near the start of the system crt0.c, and
2049 * we don't sweat the handful of bytes that might lose.
2050 */
2051 extern char **environ;
2052
2053 return((char *) &environ);
86a5659e
JB		 2054#else
2055 extern int data_start;
2056 return ((char *) &data_start);
6c65530f
JB		 2057#endif /* ORDINARY_LINK */
2058#endif /* DATA_START */
86a5659e
JB		 2059}
2060#endif /* NEED_STARTS (not CANNOT_DUMP or not SYSTEM_MALLOC) */
2061
2062#ifndef CANNOT_DUMP
2063/* Some systems that cannot dump also cannot implement these. */
2064
2065/*
2066 * Return the address of the end of the text segment prior to
2067 * doing an unexec. After unexec the return value is undefined.
2068 */
2069
2070char *
2071end_of_text ()
2072{
2073#ifdef TEXT_END
2074 return ((char *) TEXT_END);
2075#else
2076 extern int etext;
2077 return ((char *) &etext);
2078#endif
2079}
2080
2081/*
2082 * Return the address of the end of the data segment prior to
2083 * doing an unexec. After unexec the return value is undefined.
2084 */
2085
2086char *
2087end_of_data ()
2088{
2089#ifdef DATA_END
2090 return ((char *) DATA_END);
2091#else
2092 extern int edata;
2093 return ((char *) &edata);
2094#endif
2095}
2096
2097#endif /* not CANNOT_DUMP */
2098\f
c0c86835
KH		 2099/* init_system_name sets up the string for the Lisp function
2100 system-name to return. */
86a5659e
JB		 2101
2102#ifdef BSD4_1
2103#include <whoami.h>
2104#endif
2105
c0c86835 2106extern Lisp_Object Vsystem_name;
86a5659e 2107
f8a80313 2108#ifndef BSD4_1
f8a80313
RS		 2109#ifndef VMS
2110#ifdef HAVE_SOCKETS
2111#include <sys/socket.h>
2112#include <netdb.h>
2113#endif /* HAVE_SOCKETS */
2114#endif /* not VMS */
f8a80313
RS		 2115#endif /* not BSD4_1 */
2116
c0c86835
KH		 2117void
2118init_system_name ()
86a5659e 2119{
86a5659e 2120#ifdef BSD4_1
c0c86835 2121 Vsystem_name = build_string (sysname);
67004ffb 2122#else
67004ffb 2123#ifdef VMS
c0c86835
KH		 2124 char *sp, *end;
2125 if ((sp = egetenv ("SYS$NODE")) == 0)
2126 Vsystem_name = build_string ("vax-vms");
2127 else if ((end = index (sp, ':')) == 0)
2128 Vsystem_name = build_string (sp);
2129 else
2130 Vsystem_name = make_string (sp, end - sp);
67004ffb 2131#else
210b2b4f 2132#ifndef HAVE_GETHOSTNAME
c0c86835
KH		 2133 struct utsname uts;
2134 uname (&uts);
2135 Vsystem_name = build_string (uts.nodename);
67004ffb 2136#else /* HAVE_GETHOSTNAME */
cc6e7269 2137 unsigned int hostname_size = 256;
c0c86835
KH		 2138 char *hostname = (char *) alloca (hostname_size);
2139
2140 /* Try to get the host name; if the buffer is too short, try
2141 again. Apparently, the only indication gethostname gives of
2142 whether the buffer was large enough is the presence or absence
2143 of a '\0' in the string. Eech. */
2144 for (;;)
2145 {
2146 gethostname (hostname, hostname_size - 1);
2147 hostname[hostname_size - 1] = '\0';
2148
2149 /* Was the buffer large enough for the '\0'? */
2150 if (strlen (hostname) < hostname_size - 1)
2151 break;
2152
2153 hostname_size <<= 1;
2154 hostname = (char *) alloca (hostname_size);
2155 }
67004ffb 2156#ifdef HAVE_SOCKETS
c0c86835
KH		 2157 /* Turn the hostname into the official, fully-qualified hostname.
2158 Don't do this if we're going to dump; this can confuse system
2159 libraries on some machines and make the dumped emacs core dump. */
67004ffb 2160#ifndef CANNOT_DUMP
c0c86835 2161 if (initialized)
67004ffb 2162#endif /* not CANNOT_DUMP */
c0c86835 2163 {
efa04277
RS		 2164 struct hostent *hp;
2165 int count;
2166 for (count = 0; count < 10; count++)
2167 {
e24f1d55
RS		 2168#ifdef TRY_AGAIN
2169 h_errno = 0;
2170#endif
efa04277
RS		 2171 hp = gethostbyname (hostname);
2172#ifdef TRY_AGAIN
2173 if (! (hp == 0 && h_errno == TRY_AGAIN))
2174#endif
2175 break;
2176 Fsleep_for (make_number (1), Qnil);
2177 }
c0c86835
KH		 2178 if (hp)
2179 {
fe111daf 2180 char *fqdn = (char *) hp->h_name;
c0c86835
KH		 2181 char *p;
2182
2183 if (!index (fqdn, '.'))
2184 {
2185 /* We still don't have a fully qualified domain name.
2186 Try to find one in the list of alternate names */
2187 char **alias = hp->h_aliases;
2188 while (*alias && !index (*alias, '.'))
2189 alias++;
2190 if (*alias)
2191 fqdn = *alias;
2192 }
2193 hostname = fqdn;
ab1649fe 2194#if 0
c0c86835
KH		 2195 /* Convert the host name to lower case. */
2196 /* Using ctype.h here would introduce a possible locale
2197 dependence that is probably wrong for hostnames. */
2198 p = hostname;
2199 while (*p)
2200 {
2201 if (*p >= 'A' && *p <= 'Z')
2202 *p += 'a' - 'A';
2203 p++;
2204 }
2205#endif
2206 }
2207 }
67004ffb 2208#endif /* HAVE_SOCKETS */
c0c86835 2209 Vsystem_name = build_string (hostname);
67004ffb 2210#endif /* HAVE_GETHOSTNAME */
210b2b4f 2211#endif /* VMS */
67004ffb 2212#endif /* BSD4_1 */
c0c86835
KH		 2213 {
2214 unsigned char *p;
2215 for (p = XSTRING (Vsystem_name)->data; *p; p++)
2216 if (*p == ' ' || *p == '\t')
2217 *p = '-';
2218 }
67004ffb 2219}
86a5659e 2220\f
7964ba9e 2221#ifndef MSDOS
86a5659e 2222#ifndef VMS
86d1f23a 2223#if !defined (HAVE_SELECT) || defined (BROKEN_SELECT_NON_X)
86a5659e 2224
86d1f23a
KH		 2225#include "sysselect.h"
2226#undef select
2227
2228#if defined (HAVE_X_WINDOWS) && !defined (HAVE_SELECT)
86a5659e
JB		 2229/* Cause explanatory error message at compile time,
2230 since the select emulation is not good enough for X. */
2231int *x = &x_windows_lose_if_no_select_system_call;
2232#endif
2233
2234/* Emulate as much as select as is possible under 4.1 and needed by Gnu Emacs
2235 * Only checks read descriptors.
2236 */
2237/* How long to wait between checking fds in select */
2238#define SELECT_PAUSE 1
2239int select_alarmed;
2240
2241/* For longjmp'ing back to read_input_waiting. */
2242
2243jmp_buf read_alarm_throw;
2244
2245/* Nonzero if the alarm signal should throw back to read_input_waiting.
2246 The read_socket_hook function sets this to 1 while it is waiting. */
2247
2248int read_alarm_should_throw;
2249
2250SIGTYPE
2251select_alarm ()
2252{
2253 select_alarmed = 1;
2254#ifdef BSD4_1
2255 sigrelse (SIGALRM);
2256#else /* not BSD4_1 */
2257 signal (SIGALRM, SIG_IGN);
2258#endif /* not BSD4_1 */
2259 if (read_alarm_should_throw)
2260 longjmp (read_alarm_throw, 1);
2261}
2262
fe03522b 2263#ifndef WINDOWSNT
86a5659e
JB		 2264/* Only rfds are checked. */
2265int
86d1f23a 2266sys_select (nfds, rfds, wfds, efds, timeout)
86a5659e 2267 int nfds;
86d1f23a
KH		 2268 SELECT_TYPE *rfds, *wfds, *efds;
2269 EMACS_TIME *timeout;
86a5659e 2270{
86d1f23a
KH		 2271 int ravail = 0, old_alarm;
2272 SELECT_TYPE orfds;
2273 int timeoutval;
2274 int *local_timeout;
86a5659e
JB		 2275 extern int proc_buffered_char[];
2276#ifndef subprocesses
2277 int process_tick = 0, update_tick = 0;
2278#else
2279 extern int process_tick, update_tick;
2280#endif
2281 SIGTYPE (*old_trap) ();
2282 unsigned char buf;
2283
86d1f23a
KH		 2284#if defined (HAVE_SELECT) && defined (HAVE_X_WINDOWS)
2285 /* If we're using X, then the native select will work; we only need the
2286 emulation for non-X usage. */
2287 if (!NILP (Vwindow_system))
2288 return select (nfds, rfds, wfds, efds, timeout);
2289#endif
2290 timeoutval = timeout ? EMACS_SECS (*timeout) : 100000;
2291 local_timeout = &timeoutval;
2292 FD_ZERO (&orfds);
86a5659e
JB		 2293 if (rfds)
2294 {
2295 orfds = *rfds;
86d1f23a 2296 FD_ZERO (rfds);
86a5659e
JB		 2297 }
2298 if (wfds)
86d1f23a 2299 FD_ZERO (wfds);
86a5659e 2300 if (efds)
86d1f23a 2301 FD_ZERO (efds);
86a5659e
JB		 2302
2303 /* If we are looking only for the terminal, with no timeout,
2304 just read it and wait -- that's more efficient. */
86d1f23a
KH		 2305 if (*local_timeout == 100000 && process_tick == update_tick
2306 && FD_ISSET (0, &orfds))
86a5659e 2307 {
86d1f23a
KH		 2308 int fd;
2309 for (fd = 1; fd < nfds; ++fd)
2310 if (FD_ISSET (fd, &orfds))
2311 goto hardway;
86a5659e
JB		 2312 if (! detect_input_pending ())
2313 read_input_waiting ();
86d1f23a 2314 FD_SET (0, rfds);
86a5659e
JB		 2315 return 1;
2316 }
2317
86d1f23a 2318 hardway:
86a5659e
JB		 2319 /* Once a second, till the timer expires, check all the flagged read
2320 * descriptors to see if any input is available. If there is some then
2321 * set the corresponding bit in the return copy of rfds.
2322 */
2323 while (1)
2324 {
86d1f23a 2325 register int to_check, fd;
86a5659e
JB		 2326
2327 if (rfds)
2328 {
86d1f23a 2329 for (to_check = nfds, fd = 0; --to_check >= 0; fd++)
86a5659e 2330 {
86d1f23a 2331 if (FD_ISSET (fd, &orfds))
86a5659e
JB		 2332 {
2333 int avail = 0, status = 0;
2334
86d1f23a 2335 if (fd == 0)
86a5659e
JB		 2336 avail = detect_input_pending (); /* Special keyboard handler */
2337 else
2338 {
2339#ifdef FIONREAD
2340 status = ioctl (fd, FIONREAD, &avail);
2341#else /* no FIONREAD */
2342 /* Hoping it will return -1 if nothing available
2343 or 0 if all 0 chars requested are read. */
2344 if (proc_buffered_char[fd] >= 0)
2345 avail = 1;
2346 else
2347 {
2348 avail = read (fd, &buf, 1);
2349 if (avail > 0)
2350 proc_buffered_char[fd] = buf;
2351 }
2352#endif /* no FIONREAD */
2353 }
2354 if (status >= 0 && avail > 0)
2355 {
86d1f23a 2356 FD_SET (fd, rfds);
86a5659e
JB		 2357 ravail++;
2358 }
2359 }
2360 }
2361 }
2362 if (*local_timeout == 0 || ravail != 0 || process_tick != update_tick)
2363 break;
2364 old_alarm = alarm (0);
34567704 2365 old_trap = signal (SIGALRM, select_alarm);
86a5659e
JB		 2366 select_alarmed = 0;
2367 alarm (SELECT_PAUSE);
2368 /* Wait for a SIGALRM (or maybe a SIGTINT) */
2369 while (select_alarmed == 0 && *local_timeout != 0
2370 && process_tick == update_tick)
2371 {
2372 /* If we are interested in terminal input,
2373 wait by reading the terminal.
2374 That makes instant wakeup for terminal input at least. */
86d1f23a 2375 if (FD_ISSET (0, &orfds))
86a5659e
JB		 2376 {
2377 read_input_waiting ();
2378 if (detect_input_pending ())
2379 select_alarmed = 1;
2380 }
2381 else
2382 pause ();
2383 }
2384 (*local_timeout) -= SELECT_PAUSE;
2385 /* Reset the old alarm if there was one */
2386 alarm (0);
2387 signal (SIGALRM, old_trap);
2388 if (old_alarm != 0)
2389 {
2390 /* Reset or forge an interrupt for the original handler. */
2391 old_alarm -= SELECT_PAUSE;
2392 if (old_alarm <= 0)
2393 kill (getpid (), SIGALRM); /* Fake an alarm with the orig' handler */
2394 else
2395 alarm (old_alarm);
2396 }
2397 if (*local_timeout == 0) /* Stop on timer being cleared */
2398 break;
2399 }
2400 return ravail;
2401}
fe03522b 2402#endif /* not WINDOWSNT */
86a5659e
JB		 2403
2404/* Read keyboard input into the standard buffer,
2405 waiting for at least one character. */
2406
23cafe43
GV		 2407/* Make all keyboard buffers much bigger when using a window system. */
2408#ifdef HAVE_WINDOW_SYSTEM
86a5659e
JB		 2409#define BUFFER_SIZE_FACTOR 16
2410#else
2411#define BUFFER_SIZE_FACTOR 1
2412#endif
2413
2414read_input_waiting ()
2415{
86a5659e 2416 struct input_event e;
34567704
JB		 2417 int nread, i;
2418 extern int quit_char;
86a5659e
JB		 2419
2420 if (read_socket_hook)
2421 {
f4a7e5bd
RS		 2422 struct input_event buf[256];
2423
86a5659e
JB		 2424 read_alarm_should_throw = 0;
2425 if (! setjmp (read_alarm_throw))
f4a7e5bd 2426 nread = (*read_socket_hook) (0, buf, 256, 1, 0);
86a5659e
JB		 2427 else
2428 nread = -1;
f4a7e5bd
RS		 2429
2430 /* Scan the chars for C-g and store them in kbd_buffer. */
2431 for (i = 0; i < nread; i++)
2432 {
2433 kbd_buffer_store_event (&buf[i]);
2434 /* Don't look at input that follows a C-g too closely.
2435 This reduces lossage due to autorepeat on C-g. */
2436 if (buf[i].kind == ascii_keystroke
30bef8ec 2437 && buf[i].code == quit_char)
f4a7e5bd
RS		 2438 break;
2439 }
86a5659e
JB		 2440 }
2441 else
86a5659e 2442 {
f4a7e5bd
RS		 2443 char buf[3];
2444 nread = read (fileno (stdin), buf, 1);
2445
2446 /* Scan the chars for C-g and store them in kbd_buffer. */
2447 e.kind = ascii_keystroke;
bd513d9d 2448 XSETFRAME (e.frame_or_window, selected_frame);
f4a7e5bd
RS		 2449 e.modifiers = 0;
2450 for (i = 0; i < nread; i++)
a00d5589 2451 {
f4a7e5bd
RS		 2452 /* Convert chars > 0177 to meta events if desired.
2453 We do this under the same conditions that read_avail_input does. */
2454 if (read_socket_hook == 0)
2455 {
2456 /* If the user says she has a meta key, then believe her. */
2457 if (meta_key == 1 && (buf[i] & 0x80))
2458 e.modifiers = meta_modifier;
2459 if (meta_key != 2)
2460 buf[i] &= ~0x80;
2461 }
b95520f5 2462
c81d47b4 2463 XSETINT (e.code, buf[i]);
f4a7e5bd
RS		 2464 kbd_buffer_store_event (&e);
2465 /* Don't look at input that follows a C-g too closely.
2466 This reduces lossage due to autorepeat on C-g. */
2467 if (buf[i] == quit_char)
2468 break;
2469 }
86a5659e
JB		 2470 }
2471}
2472
2473#endif /* not HAVE_SELECT */
2474#endif /* not VMS */
7964ba9e 2475#endif /* not MSDOS */
86a5659e
JB		 2476\f
2477#ifdef BSD4_1
86a5659e
JB		 2478/*
2479 * Partially emulate 4.2 open call.
2480 * open is defined as this in 4.1.
2481 *
2482 * - added by Michael Bloom @ Citicorp/TTI
2483 *
2484 */
2485
2486int
2487sys_open (path, oflag, mode)
2488 char *path;
2489 int oflag, mode;
2490{
2491 if (oflag & O_CREAT)
2492 return creat (path, mode);
2493 else
2494 return open (path, oflag);
2495}
2496
23dab951
RS		 2497init_sigio (fd)
2498 int fd;
86a5659e
JB		 2499{
2500 if (noninteractive)
2501 return;
2502 lmode = LINTRUP | lmode;
23dab951 2503 ioctl (fd, TIOCLSET, &lmode);
86a5659e
JB		 2504}
2505
2506reset_sigio ()
2507{
2508 if (noninteractive)
2509 return;
2510 lmode = ~LINTRUP & lmode;
2511 ioctl (0, TIOCLSET, &lmode);
2512}
2513
2514request_sigio ()
2515{
2516 sigrelse (SIGTINT);
2517
2518 interrupts_deferred = 0;
2519}
2520
2521unrequest_sigio ()
2522{
2523 sighold (SIGTINT);
2524
2525 interrupts_deferred = 1;
2526}
2527
2528/* still inside #ifdef BSD4_1 */
2529#ifdef subprocesses
2530
2531int sigheld; /* Mask of held signals */
2532
2533sigholdx (signum)
2534 int signum;
2535{
2536 sigheld |= sigbit (signum);
2537 sighold (signum);
2538}
2539
2540sigisheld (signum)
2541 int signum;
2542{
2543 sigheld |= sigbit (signum);
2544}
2545
2546sigunhold (signum)
2547 int signum;
2548{
2549 sigheld &= ~sigbit (signum);
2550 sigrelse (signum);
2551}
2552
2553sigfree () /* Free all held signals */
2554{
2555 int i;
2556 for (i = 0; i < NSIG; i++)
2557 if (sigheld & sigbit (i))
2558 sigrelse (i);
2559 sigheld = 0;
2560}
2561
2562sigbit (i)
2563{
2564 return 1 << (i - 1);
2565}
2566#endif /* subprocesses */
2567#endif /* BSD4_1 */
2568\f
2569/* POSIX signals support - DJB */
2570/* Anyone with POSIX signals should have ANSI C declarations */
2571
2572#ifdef POSIX_SIGNALS
2573
2574sigset_t old_mask, empty_mask, full_mask, temp_mask;
2575static struct sigaction new_action, old_action;
2576
2577init_signals ()
2578{
00eaaa32
JB		 2579 sigemptyset (&empty_mask);
2580 sigfillset (&full_mask);
86a5659e
JB		 2581}
2582
86a5659e
JB		 2583signal_handler_t
2584sys_signal (int signal_number, signal_handler_t action)
2585{
2586#ifdef DGUX
2587 /* This gets us restartable system calls for efficiency.
2588 The "else" code will works as well. */
2589 return (berk_signal (signal_number, action));
2590#else
2591 sigemptyset (&new_action.sa_mask);
2592 new_action.sa_handler = action;
25ab68af
RS		 2593#ifdef SA_RESTART
2594 /* Emacs mostly works better with restartable system services. If this
2595 * flag exists, we probably want to turn it on here.
2596 */
2597 new_action.sa_flags = SA_RESTART;
2598#else
4a785b6e 2599 new_action.sa_flags = 0;
25ab68af 2600#endif
d32b2f3c 2601 sigaction (signal_number, &new_action, &old_action);
86a5659e
JB		 2602 return (old_action.sa_handler);
2603#endif /* DGUX */
2604}
2605
e065a56e
JB		 2606#ifndef __GNUC__
2607/* If we're compiling with GCC, we don't need this function, since it
2608 can be written as a macro. */
2609sigset_t
2610sys_sigmask (int sig)
2611{
2612 sigset_t mask;
2613 sigemptyset (&mask);
2614 sigaddset (&mask, sig);
2615 return mask;
2616}
2617#endif
2618
86a5659e
JB		 2619int
2620sys_sigpause (sigset_t new_mask)
2621{
2622 /* pause emulating berk sigpause... */
2623 sigsuspend (&new_mask);
2624 return (EINTR);
2625}
2626
2627/* I'd like to have these guys return pointers to the mask storage in here,
2628 but there'd be trouble if the code was saving multiple masks. I'll be
2629 safe and pass the structure. It normally won't be more than 2 bytes
2630 anyhow. - DJB */
2631
2632sigset_t
2633sys_sigblock (sigset_t new_mask)
2634{
2635 sigset_t old_mask;
2636 sigprocmask (SIG_BLOCK, &new_mask, &old_mask);
2637 return (old_mask);
2638}
2639
2640sigset_t
2641sys_sigunblock (sigset_t new_mask)
2642{
2643 sigset_t old_mask;
2644 sigprocmask (SIG_UNBLOCK, &new_mask, &old_mask);
2645 return (old_mask);
2646}
2647
2648sigset_t
2649sys_sigsetmask (sigset_t new_mask)
2650{
2651 sigset_t old_mask;
2652 sigprocmask (SIG_SETMASK, &new_mask, &old_mask);
2653 return (old_mask);
2654}
2655
2656#endif /* POSIX_SIGNALS */
2657\f
9927a7b1 2658#ifndef HAVE_RANDOM
4bb8c8b7
KH		 2659#ifdef random
2660#define HAVE_RANDOM
2661#endif
2662#endif
2663
2664/* Figure out how many bits the system's random number generator uses.
2665 `random' and `lrand48' are assumed to return 31 usable bits.
2666 BSD `rand' returns a 31 bit value but the low order bits are unusable;
2667 so we'll shift it and treat it like the 15-bit USG `rand'. */
2668
2669#ifndef RAND_BITS
2670# ifdef HAVE_RANDOM
2671# define RAND_BITS 31
2672# else /* !HAVE_RANDOM */
2673# ifdef HAVE_LRAND48
2674# define RAND_BITS 31
2675# define random lrand48
2676# else /* !HAVE_LRAND48 */
2677# define RAND_BITS 15
2678# if RAND_MAX == 32767
2679# define random rand
2680# else /* RAND_MAX != 32767 */
2681# if RAND_MAX == 2147483647
2682# define random() (rand () >> 16)
2683# else /* RAND_MAX != 2147483647 */
2684# ifdef USG
2685# define random rand
2686# else
2687# define random() (rand () >> 16)
2688# endif /* !BSD */
2689# endif /* RAND_MAX != 2147483647 */
2690# endif /* RAND_MAX != 32767 */
2691# endif /* !HAVE_LRAND48 */
2692# endif /* !HAVE_RANDOM */
2693#endif /* !RAND_BITS */
2e46c7c6 2694
4bb8c8b7
KH		 2695void
2696seed_random (arg)
2697 long arg;
86a5659e 2698{
4bb8c8b7
KH		 2699#ifdef HAVE_RANDOM
2700 srandom ((unsigned int)arg);
f8b53a82 2701#else
4bb8c8b7 2702# ifdef HAVE_LRAND48
76425a49 2703 srand48 (arg);
4bb8c8b7
KH		 2704# else
2705 srand ((unsigned int)arg);
2706# endif
2e46c7c6 2707#endif
86a5659e
JB		 2708}
2709
4bb8c8b7
KH		 2710/*
2711 * Build a full Emacs-sized word out of whatever we've got.
2712 * This suffices even for a 64-bit architecture with a 15-bit rand.
2713 */
2714long
2715get_random ()
2716{
2717 long val = random ();
2718#if VALBITS > RAND_BITS
2719 val = (val << RAND_BITS) ^ random ();
2720#if VALBITS > 2*RAND_BITS
2721 val = (val << RAND_BITS) ^ random ();
2722#if VALBITS > 3*RAND_BITS
2723 val = (val << RAND_BITS) ^ random ();
2724#if VALBITS > 4*RAND_BITS
2725 val = (val << RAND_BITS) ^ random ();
2726#endif /* need at least 5 */
2727#endif /* need at least 4 */
2728#endif /* need at least 3 */
2729#endif /* need at least 2 */
2730 return val & ((1L << VALBITS) - 1);
2731}
86a5659e
JB		 2732\f
2733#ifdef WRONG_NAME_INSQUE
2734
2735insque (q,p)
2736 caddr_t q,p;
2737{
2738 _insque (q,p);
2739}
2740
2741#endif
2742\f
2743#ifdef VMS
2744
2745#ifdef getenv
2746/* If any place else asks for the TERM variable,
2747 allow it to be overridden with the EMACS_TERM variable
2748 before attempting to translate the logical name TERM. As a last
2749 resort, ask for VAX C's special idea of the TERM variable. */
2750#undef getenv
2751char *
2752sys_getenv (name)
2753 char *name;
2754{
2755 register char *val;
2756 static char buf[256];
2757 static struct dsc$descriptor_s equiv
2758 = {sizeof (buf), DSC$K_DTYPE_T, DSC$K_CLASS_S, buf};
2759 static struct dsc$descriptor_s d_name
2760 = {0, DSC$K_DTYPE_T, DSC$K_CLASS_S, 0};
2761 short eqlen;
2762
2763 if (!strcmp (name, "TERM"))
2764 {
2765 val = (char *) getenv ("EMACS_TERM");
2766 if (val)
2767 return val;
2768 }
2769
2770 d_name.dsc$w_length = strlen (name);
2771 d_name.dsc$a_pointer = name;
986ffb24 2772 if (LIB$SYS_TRNLOG (&d_name, &eqlen, &equiv) == 1)
86a5659e
JB		 2773 {
2774 char *str = (char *) xmalloc (eqlen + 1);
2775 bcopy (buf, str, eqlen);
2776 str[eqlen] = '\0';
2777 /* This is a storage leak, but a pain to fix. With luck,
2778 no one will ever notice. */
2779 return str;
2780 }
2781 return (char *) getenv (name);
2782}
2783#endif /* getenv */
2784
2785#ifdef abort
2786/* Since VMS doesn't believe in core dumps, the only way to debug this beast is
2787 to force a call on the debugger from within the image. */
2788#undef abort
2789sys_abort ()
2790{
2791 reset_sys_modes ();
2792 LIB$SIGNAL (SS$_DEBUG);
2793}
2794#endif /* abort */
2795#endif /* VMS */
2796\f
2797#ifdef VMS
2798#ifdef LINK_CRTL_SHARE
ea5a0917 2799#ifdef SHARABLE_LIB_BUG
eb8c3be9 2800/* Variables declared noshare and initialized in sharable libraries
86a5659e
JB		 2801 cannot be shared. The VMS linker incorrectly forces you to use a private
2802 version which is uninitialized... If not for this "feature", we
2803 could use the C library definition of sys_nerr and sys_errlist. */
2804int sys_nerr = 35;
2805char *sys_errlist[] =
2806 {
2807 "error 0",
2808 "not owner",
2809 "no such file or directory",
2810 "no such process",
2811 "interrupted system call",
2812 "i/o error",
2813 "no such device or address",
2814 "argument list too long",
2815 "exec format error",
2816 "bad file number",
2817 "no child process",
2818 "no more processes",
2819 "not enough memory",
2820 "permission denied",
2821 "bad address",
2822 "block device required",
2823 "mount devices busy",
2824 "file exists",
2825 "cross-device link",
2826 "no such device",
2827 "not a directory",
2828 "is a directory",
2829 "invalid argument",
2830 "file table overflow",
2831 "too many open files",
2832 "not a typewriter",
2833 "text file busy",
2834 "file too big",
2835 "no space left on device",
2836 "illegal seek",
2837 "read-only file system",
2838 "too many links",
2839 "broken pipe",
2840 "math argument",
2841 "result too large",
2842 "I/O stream empty",
2843 "vax/vms specific error code nontranslatable error"
2844 };
ea5a0917 2845#endif /* SHARABLE_LIB_BUG */
86a5659e
JB		 2846#endif /* LINK_CRTL_SHARE */
2847#endif /* VMS */
7088d1ca
RM		 2848
2849#ifndef HAVE_STRERROR
fe03522b 2850#ifndef WINDOWSNT
7088d1ca
RM		 2851char *
2852strerror (errnum)
2853 int errnum;
2854{
2855 extern char *sys_errlist[];
2856 extern int sys_nerr;
2857
2858 if (errnum >= 0 && errnum < sys_nerr)
2859 return sys_errlist[errnum];
2860 return (char *) "Unknown error";
2861}
fe03522b 2862#endif /* not WINDOWSNT */
7088d1ca 2863#endif /* ! HAVE_STRERROR */
86a5659e
JB		 2864\f
2865#ifdef INTERRUPTIBLE_OPEN
2866
2867int
2868/* VARARGS 2 */
2869sys_open (path, oflag, mode)
2870 char *path;
2871 int oflag, mode;
2872{
2873 register int rtnval;
2874
2875 while ((rtnval = open (path, oflag, mode)) == -1
2876 && (errno == EINTR));
2877 return (rtnval);
2878}
2879
2880#endif /* INTERRUPTIBLE_OPEN */
2881
2882#ifdef INTERRUPTIBLE_CLOSE
2883
2884sys_close (fd)
2885 int fd;
2886{
fe111daf 2887 int did_retry = 0;
86a5659e
JB		 2888 register int rtnval;
2889
2890 while ((rtnval = close (fd)) == -1
fe111daf
KH		 2891 && (errno == EINTR))
2892 did_retry = 1;
2893
2894 /* If close is interrupted SunOS 4.1 may or may not have closed the
2895 file descriptor. If it did the second close will fail with
2896 errno = EBADF. That means we have succeeded. */
2897 if (rtnval == -1 && did_retry && errno == EBADF)
2898 return 0;
2899
86a5659e
JB		 2900 return rtnval;
2901}
2902
2903#endif /* INTERRUPTIBLE_CLOSE */
2904
2905#ifdef INTERRUPTIBLE_IO
2906
2907int
2908sys_read (fildes, buf, nbyte)
2909 int fildes;
2910 char *buf;
2911 unsigned int nbyte;
2912{
2913 register int rtnval;
2914
2915 while ((rtnval = read (fildes, buf, nbyte)) == -1
2916 && (errno == EINTR));
2917 return (rtnval);
2918}
2919
2920int
2921sys_write (fildes, buf, nbyte)
2922 int fildes;
2923 char *buf;
2924 unsigned int nbyte;
2925{
b95520f5 2926 register int rtnval, bytes_written;
86a5659e 2927
b95520f5
BF		 2928 bytes_written = 0;
2929
2930 while (nbyte > 0)
2931 {
2932 rtnval = write (fildes, buf, nbyte);
2933
2934 if (rtnval == -1)
2935 {
2936 if (errno == EINTR)
2937 continue;
2938 else
aa670904 2939 return (bytes_written ? bytes_written : -1);
b95520f5
BF		 2940 }
2941
2942 buf += rtnval;
2943 nbyte -= rtnval;
2944 bytes_written += rtnval;
2945 }
2946 return (bytes_written);
86a5659e
JB		 2947}
2948
2949#endif /* INTERRUPTIBLE_IO */
2950\f
0e18d8ef 2951#ifndef HAVE_VFORK
fe03522b 2952#ifndef WINDOWSNT
0e18d8ef 2953/*
fe03522b 2954 * Substitute fork for vfork on USG flavors.
0e18d8ef
RS		 2955 */
2956
e336874b 2957VFORK_RETURN_TYPE
0e18d8ef
RS		 2958vfork ()
2959{
2960 return (fork ());
2961}
fe03522b 2962#endif /* not WINDOWSNT */
0e18d8ef
RS		 2963#endif /* not HAVE_VFORK */
2964\f
86a5659e
JB		 2965#ifdef USG
2966/*
2967 * All of the following are for USG.
2968 *
2969 * On USG systems the system calls are INTERRUPTIBLE by signals
2970 * that the user program has elected to catch. Thus the system call
2971 * must be retried in these cases. To handle this without massive
2972 * changes in the source code, we remap the standard system call names
2973 * to names for our own functions in sysdep.c that do the system call
2974 * with retries. Actually, for portability reasons, it is good
2975 * programming practice, as this example shows, to limit all actual
eb8c3be9 2976 * system calls to a single occurrence in the source. Sure, this
86a5659e
JB		 2977 * adds an extra level of function call overhead but it is almost
2978 * always negligible. Fred Fish, Unisoft Systems Inc.
2979 */
2980
00eaaa32 2981#ifndef HAVE_SYS_SIGLIST
86a5659e
JB		 2982char *sys_siglist[NSIG + 1] =
2983{
2984#ifdef AIX
2985/* AIX has changed the signals a bit */
2986 "bogus signal", /* 0 */
2987 "hangup", /* 1 SIGHUP */
2988 "interrupt", /* 2 SIGINT */
2989 "quit", /* 3 SIGQUIT */
2990 "illegal instruction", /* 4 SIGILL */
2991 "trace trap", /* 5 SIGTRAP */
2992 "IOT instruction", /* 6 SIGIOT */
2993 "crash likely", /* 7 SIGDANGER */
2994 "floating point exception", /* 8 SIGFPE */
2995 "kill", /* 9 SIGKILL */
2996 "bus error", /* 10 SIGBUS */
2997 "segmentation violation", /* 11 SIGSEGV */
2998 "bad argument to system call", /* 12 SIGSYS */
2999 "write on a pipe with no one to read it", /* 13 SIGPIPE */
3000 "alarm clock", /* 14 SIGALRM */
3001 "software termination signum", /* 15 SIGTERM */
3002 "user defined signal 1", /* 16 SIGUSR1 */
3003 "user defined signal 2", /* 17 SIGUSR2 */
3004 "death of a child", /* 18 SIGCLD */
3005 "power-fail restart", /* 19 SIGPWR */
3006 "bogus signal", /* 20 */
3007 "bogus signal", /* 21 */
3008 "bogus signal", /* 22 */
3009 "bogus signal", /* 23 */
3010 "bogus signal", /* 24 */
3011 "LAN I/O interrupt", /* 25 SIGAIO */
3012 "PTY I/O interrupt", /* 26 SIGPTY */
3013 "I/O intervention required", /* 27 SIGIOINT */
6056c55b 3014#ifdef AIXHFT
86a5659e
JB		 3015 "HFT grant", /* 28 SIGGRANT */
3016 "HFT retract", /* 29 SIGRETRACT */
3017 "HFT sound done", /* 30 SIGSOUND */
3018 "HFT input ready", /* 31 SIGMSG */
6056c55b 3019#endif
86a5659e
JB		 3020#else /* not AIX */
3021 "bogus signal", /* 0 */
3022 "hangup", /* 1 SIGHUP */
3023 "interrupt", /* 2 SIGINT */
3024 "quit", /* 3 SIGQUIT */
3025 "illegal instruction", /* 4 SIGILL */
3026 "trace trap", /* 5 SIGTRAP */
3027 "IOT instruction", /* 6 SIGIOT */
3028 "EMT instruction", /* 7 SIGEMT */
3029 "floating point exception", /* 8 SIGFPE */
3030 "kill", /* 9 SIGKILL */
3031 "bus error", /* 10 SIGBUS */
3032 "segmentation violation", /* 11 SIGSEGV */
3033 "bad argument to system call", /* 12 SIGSYS */
3034 "write on a pipe with no one to read it", /* 13 SIGPIPE */
3035 "alarm clock", /* 14 SIGALRM */
3036 "software termination signum", /* 15 SIGTERM */
3037 "user defined signal 1", /* 16 SIGUSR1 */
3038 "user defined signal 2", /* 17 SIGUSR2 */
3039 "death of a child", /* 18 SIGCLD */
3040 "power-fail restart", /* 19 SIGPWR */
0f0ea229
RS		 3041#ifdef sun
3042 "window size change", /* 20 SIGWINCH */
3043 "urgent socket condition", /* 21 SIGURG */
ea5a0917 3044 "pollable event occurred", /* 22 SIGPOLL */
0f0ea229
RS		 3045 "stop (cannot be caught or ignored)", /* 23 SIGSTOP */
3046 "user stop requested from tty", /* 24 SIGTSTP */
3047 "stopped process has been continued", /* 25 SIGCONT */
3048 "background tty read attempted", /* 26 SIGTTIN */
3049 "background tty write attempted", /* 27 SIGTTOU */
3050 "virtual timer expired", /* 28 SIGVTALRM */
3051 "profiling timer expired", /* 29 SIGPROF */
3052 "exceeded cpu limit", /* 30 SIGXCPU */
3053 "exceeded file size limit", /* 31 SIGXFSZ */
3054 "process's lwps are blocked", /* 32 SIGWAITING */
3055 "special signal used by thread library", /* 33 SIGLWP */
2da0df4d 3056#ifdef SIGFREEZE
0f0ea229 3057 "Special Signal Used By CPR", /* 34 SIGFREEZE */
2da0df4d
RS		 3058#endif
3059#ifdef SIGTHAW
0f0ea229 3060 "Special Signal Used By CPR", /* 35 SIGTHAW */
2da0df4d 3061#endif
0f0ea229 3062#endif /* sun */
86a5659e
JB		 3063#endif /* not AIX */
3064 0
3065 };
70080de1 3066#endif /* HAVE_SYS_SIGLIST */
86a5659e
JB		 3067
3068/*
3069 * Warning, this function may not duplicate 4.2 action properly
3070 * under error conditions.
3071 */
3072
3073#ifndef MAXPATHLEN
3074/* In 4.1, param.h fails to define this. */
3075#define MAXPATHLEN 1024
3076#endif
3077
3078#ifndef HAVE_GETWD
3079
3080char *
3081getwd (pathname)
3082 char *pathname;
3083{
3084 char *npath, *spath;
3085 extern char *getcwd ();
3086
9ac0d9e0 3087 BLOCK_INPUT; /* getcwd uses malloc */
86a5659e 3088 spath = npath = getcwd ((char *) 0, MAXPATHLEN);
f4a7e5bd
RS		 3089 if (spath == 0)
3090 return spath;
86a5659e
JB		 3091 /* On Altos 3068, getcwd can return @hostname/dir, so discard
3092 up to first slash. Should be harmless on other systems. */
3093 while (*npath && *npath != '/')
3094 npath++;
3095 strcpy (pathname, npath);
3096 free (spath); /* getcwd uses malloc */
9ac0d9e0 3097 UNBLOCK_INPUT;
86a5659e
JB		 3098 return pathname;
3099}
3100
3101#endif /* HAVE_GETWD */
3102
3103/*
3104 * Emulate rename using unlink/link. Note that this is
3105 * only partially correct. Also, doesn't enforce restriction
3106 * that files be of same type (regular->regular, dir->dir, etc).
3107 */
3108
4746118a
JB		 3109#ifndef HAVE_RENAME
3110
86a5659e 3111rename (from, to)
19c7afdf
JB		 3112 const char *from;
3113 const char *to;
86a5659e
JB		 3114{
3115 if (access (from, 0) == 0)
3116 {
3117 unlink (to);
3118 if (link (from, to) == 0)
3119 if (unlink (from) == 0)
3120 return (0);
3121 }
3122 return (-1);
3123}
3124
4746118a
JB		 3125#endif
3126
86a5659e
JB		 3127
3128#ifdef HPUX
3129#ifndef HAVE_PERROR
3130
3131/* HPUX curses library references perror, but as far as we know
3132 it won't be called. Anyway this definition will do for now. */
3133
3134perror ()
3135{
3136}
3137
3138#endif /* not HAVE_PERROR */
3139#endif /* HPUX */
3140
3141#ifndef HAVE_DUP2
3142
3143/*
3144 * Emulate BSD dup2. First close newd if it already exists.
3145 * Then, attempt to dup oldd. If not successful, call dup2 recursively
3146 * until we are, then close the unsuccessful ones.
3147 */
3148
3149dup2 (oldd, newd)
3150 int oldd;
3151 int newd;
3152{
3153 register int fd, ret;
3154
3155 sys_close (newd);
3156
3157#ifdef F_DUPFD
3158 fd = fcntl (oldd, F_DUPFD, newd);
3159 if (fd != newd)
7088d1ca 3160 error ("can't dup2 (%i,%i) : %s", oldd, newd, strerror (errno));
86a5659e
JB		 3161#else
3162 fd = dup (old);
3163 if (fd == -1)
3164 return -1;
3165 if (fd == new)
3166 return new;
3167 ret = dup2 (old,new);
3168 sys_close (fd);
3169 return ret;
3170#endif
3171}
3172
3173#endif /* not HAVE_DUP2 */
3174
3175/*
3176 * Gettimeofday. Simulate as much as possible. Only accurate
3177 * to nearest second. Emacs doesn't use tzp so ignore it for now.
3178 * Only needed when subprocesses are defined.
3179 */
3180
3181#ifdef subprocesses
3182#ifndef VMS
3183#ifndef HAVE_GETTIMEOFDAY
3184#ifdef HAVE_TIMEVAL
3185
3186/* ARGSUSED */
3187gettimeofday (tp, tzp)
3188 struct timeval *tp;
3189 struct timezone *tzp;
3190{
3191 extern long time ();
3192
3193 tp->tv_sec = time ((long *)0);
3194 tp->tv_usec = 0;
4ca7594f
RS		 3195 if (tzp != 0)
3196 tzp->tz_minuteswest = -1;
86a5659e
JB		 3197}
3198
3199#endif
3200#endif
3201#endif
3202#endif /* subprocess && !HAVE_GETTIMEOFDAY && HAVE_TIMEVAL && !VMS */
3203
3204/*
3205 * This function will go away as soon as all the stubs fixed. (fnf)
3206 */
3207
3208croak (badfunc)
3209 char *badfunc;
3210{
3211 printf ("%s not yet implemented\r\n", badfunc);
3212 reset_sys_modes ();
3213 exit (1);
3214}
3215
3216#endif /* USG */
3217\f
3218#ifdef DGUX
3219
3220char *sys_siglist[NSIG + 1] =
3221{
3222 "null signal", /* 0 SIGNULL */
3223 "hangup", /* 1 SIGHUP */
3224 "interrupt", /* 2 SIGINT */
3225 "quit", /* 3 SIGQUIT */
3226 "illegal instruction", /* 4 SIGILL */
3227 "trace trap", /* 5 SIGTRAP */
3228 "abort termination", /* 6 SIGABRT */
3229 "SIGEMT", /* 7 SIGEMT */
3230 "floating point exception", /* 8 SIGFPE */
3231 "kill", /* 9 SIGKILL */
3232 "bus error", /* 10 SIGBUS */
3233 "segmentation violation", /* 11 SIGSEGV */
3234 "bad argument to system call", /* 12 SIGSYS */
3235 "write on a pipe with no reader", /* 13 SIGPIPE */
3236 "alarm clock", /* 14 SIGALRM */
3237 "software termination signal", /* 15 SIGTERM */
3238 "user defined signal 1", /* 16 SIGUSR1 */
3239 "user defined signal 2", /* 17 SIGUSR2 */
3240 "child stopped or terminated", /* 18 SIGCLD */
3241 "power-fail restart", /* 19 SIGPWR */
3242 "window size changed", /* 20 SIGWINCH */
3243 "undefined", /* 21 */
eb8c3be9 3244 "pollable event occurred", /* 22 SIGPOLL */
86a5659e
JB		 3245 "sendable stop signal not from tty", /* 23 SIGSTOP */
3246 "stop signal from tty", /* 24 SIGSTP */
3247 "continue a stopped process", /* 25 SIGCONT */
3248 "attempted background tty read", /* 26 SIGTTIN */
3249 "attempted background tty write", /* 27 SIGTTOU */
3250 "undefined", /* 28 */
3251 "undefined", /* 29 */
3252 "undefined", /* 30 */
3253 "undefined", /* 31 */
3254 "undefined", /* 32 */
3255 "socket (TCP/IP) urgent data arrival", /* 33 SIGURG */
3256 "I/O is possible", /* 34 SIGIO */
3257 "exceeded cpu time limit", /* 35 SIGXCPU */
3258 "exceeded file size limit", /* 36 SIGXFSZ */
3259 "virtual time alarm", /* 37 SIGVTALRM */
3260 "profiling time alarm", /* 38 SIGPROF */
3261 "undefined", /* 39 */
3262 "file record locks revoked", /* 40 SIGLOST */
3263 "undefined", /* 41 */
3264 "undefined", /* 42 */
3265 "undefined", /* 43 */
3266 "undefined", /* 44 */
3267 "undefined", /* 45 */
3268 "undefined", /* 46 */
3269 "undefined", /* 47 */
3270 "undefined", /* 48 */
3271 "undefined", /* 49 */
3272 "undefined", /* 50 */
3273 "undefined", /* 51 */
3274 "undefined", /* 52 */
3275 "undefined", /* 53 */
3276 "undefined", /* 54 */
3277 "undefined", /* 55 */
3278 "undefined", /* 56 */
3279 "undefined", /* 57 */
3280 "undefined", /* 58 */
3281 "undefined", /* 59 */
3282 "undefined", /* 60 */
3283 "undefined", /* 61 */
3284 "undefined", /* 62 */
3285 "undefined", /* 63 */
3286 "notification message in mess. queue", /* 64 SIGDGNOTIFY */
3287 0
3288};
3289
3290#endif /* DGUX */
3291\f
3292/* Directory routines for systems that don't have them. */
3293
3294#ifdef SYSV_SYSTEM_DIR
3295
3296#include <dirent.h>
3297
1db6401c 3298#if defined(BROKEN_CLOSEDIR) || !defined(HAVE_CLOSEDIR)
cfdc57af 3299
86a5659e
JB		 3300int
3301closedir (dirp)
3302 register DIR *dirp; /* stream from opendir */
3303{
cfdc57af
RS		 3304 int rtnval;
3305
3306 rtnval = sys_close (dirp->dd_fd);
1b929d25 3307
65aa44ac
JB		 3308 /* Some systems (like Solaris) allocate the buffer and the DIR all
3309 in one block. Why in the world are we freeing this ourselves
3310 anyway? */
3311#if ! (defined (sun) && defined (USG5_4))
3312 xfree ((char *) dirp->dd_buf); /* directory block defined in <dirent.h> */
3313#endif
9ac0d9e0 3314 xfree ((char *) dirp);
cfdc57af
RS		 3315
3316 return rtnval;
86a5659e 3317}
1db6401c 3318#endif /* BROKEN_CLOSEDIR or not HAVE_CLOSEDIR */
86a5659e
JB		 3319#endif /* SYSV_SYSTEM_DIR */
3320
3321#ifdef NONSYSTEM_DIR_LIBRARY
3322
3323DIR *
3324opendir (filename)
3325 char *filename; /* name of directory */
3326{
3327 register DIR *dirp; /* -> malloc'ed storage */
3328 register int fd; /* file descriptor for read */
3329 struct stat sbuf; /* result of fstat */
3330
3331 fd = sys_open (filename, 0);
3332 if (fd < 0)
3333 return 0;
3334
9ac0d9e0 3335 BLOCK_INPUT;
86a5659e
JB		 3336 if (fstat (fd, &sbuf) < 0
3337 || (sbuf.st_mode & S_IFMT) != S_IFDIR
3338 || (dirp = (DIR *) malloc (sizeof (DIR))) == 0)
3339 {
3340 sys_close (fd);
9ac0d9e0 3341 UNBLOCK_INPUT;
86a5659e
JB		 3342 return 0; /* bad luck today */
3343 }
9ac0d9e0 3344 UNBLOCK_INPUT;
86a5659e
JB		 3345
3346 dirp->dd_fd = fd;
3347 dirp->dd_loc = dirp->dd_size = 0; /* refill needed */
3348
3349 return dirp;
3350}
3351
3352void
3353closedir (dirp)
3354 register DIR *dirp; /* stream from opendir */
3355{
3356 sys_close (dirp->dd_fd);
9ac0d9e0 3357 xfree ((char *) dirp);
86a5659e
JB		 3358}
3359
3360
3361#ifndef VMS
3362#define DIRSIZ 14
3363struct olddir
3364 {
3365 ino_t od_ino; /* inode */
3366 char od_name[DIRSIZ]; /* filename */
3367 };
3368#endif /* not VMS */
3369
3370struct direct dir_static; /* simulated directory contents */
3371
3372/* ARGUSED */
3373struct direct *
3374readdir (dirp)
3375 register DIR *dirp; /* stream from opendir */
3376{
3377#ifndef VMS
3378 register struct olddir *dp; /* -> directory data */
3379#else /* VMS */
3380 register struct dir$_name *dp; /* -> directory data */
3381 register struct dir$_version *dv; /* -> version data */
3382#endif /* VMS */
3383
3384 for (; ;)
3385 {
3386 if (dirp->dd_loc >= dirp->dd_size)
3387 dirp->dd_loc = dirp->dd_size = 0;
3388
3389 if (dirp->dd_size == 0 /* refill buffer */
3390 && (dirp->dd_size = sys_read (dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ)) <= 0)
3391 return 0;
3392
3393#ifndef VMS
3394 dp = (struct olddir *) &dirp->dd_buf[dirp->dd_loc];
3395 dirp->dd_loc += sizeof (struct olddir);
3396
3397 if (dp->od_ino != 0) /* not deleted entry */
3398 {
3399 dir_static.d_ino = dp->od_ino;
3400 strncpy (dir_static.d_name, dp->od_name, DIRSIZ);
3401 dir_static.d_name[DIRSIZ] = '\0';
3402 dir_static.d_namlen = strlen (dir_static.d_name);
3403 dir_static.d_reclen = sizeof (struct direct)
3404 - MAXNAMLEN + 3
3405 + dir_static.d_namlen - dir_static.d_namlen % 4;
3406 return &dir_static; /* -> simulated structure */
3407 }
3408#else /* VMS */
3409 dp = (struct dir$_name *) dirp->dd_buf;
3410 if (dirp->dd_loc == 0)
3411 dirp->dd_loc = (dp->dir$b_namecount&1) ? dp->dir$b_namecount + 1
3412 : dp->dir$b_namecount;
3413 dv = (struct dir$_version *)&dp->dir$t_name[dirp->dd_loc];
3414 dir_static.d_ino = dv->dir$w_fid_num;
3415 dir_static.d_namlen = dp->dir$b_namecount;
3416 dir_static.d_reclen = sizeof (struct direct)
3417 - MAXNAMLEN + 3
3418 + dir_static.d_namlen - dir_static.d_namlen % 4;
3419 strncpy (dir_static.d_name, dp->dir$t_name, dp->dir$b_namecount);
3420 dir_static.d_name[dir_static.d_namlen] = '\0';
3421 dirp->dd_loc = dirp->dd_size; /* only one record at a time */
3422 return &dir_static;
3423#endif /* VMS */
3424 }
3425}
3426
3427#ifdef VMS
3428/* readdirver is just like readdir except it returns all versions of a file
3429 as separate entries. */
3430
3431/* ARGUSED */
3432struct direct *
3433readdirver (dirp)
3434 register DIR *dirp; /* stream from opendir */
3435{
3436 register struct dir$_name *dp; /* -> directory data */
3437 register struct dir$_version *dv; /* -> version data */
3438
3439 if (dirp->dd_loc >= dirp->dd_size - sizeof (struct dir$_name))
3440 dirp->dd_loc = dirp->dd_size = 0;
3441
3442 if (dirp->dd_size == 0 /* refill buffer */
3443 && (dirp->dd_size = sys_read (dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ)) <= 0)
3444 return 0;
3445
3446 dp = (struct dir$_name *) dirp->dd_buf;
3447 if (dirp->dd_loc == 0)
3448 dirp->dd_loc = (dp->dir$b_namecount & 1) ? dp->dir$b_namecount + 1
3449 : dp->dir$b_namecount;
3450 dv = (struct dir$_version *) &dp->dir$t_name[dirp->dd_loc];
3451 strncpy (dir_static.d_name, dp->dir$t_name, dp->dir$b_namecount);
3452 sprintf (&dir_static.d_name[dp->dir$b_namecount], ";%d", dv->dir$w_version);
3453 dir_static.d_namlen = strlen (dir_static.d_name);
3454 dir_static.d_ino = dv->dir$w_fid_num;
3455 dir_static.d_reclen = sizeof (struct direct) - MAXNAMLEN + 3
3456 + dir_static.d_namlen - dir_static.d_namlen % 4;
3457 dirp->dd_loc = ((char *) (++dv) - dp->dir$t_name);
3458 return &dir_static;
3459}
3460
3461#endif /* VMS */
3462
3463#endif /* NONSYSTEM_DIR_LIBRARY */
23524fb9
JB		 3464
3465\f
53ea491a 3466int
061ea326 3467set_file_times (filename, atime, mtime)
8334eb21 3468 char *filename;
53ea491a
KH		 3469 EMACS_TIME atime, mtime;
3470{
3471#ifdef HAVE_UTIMES
3472 struct timeval tv[2];
3473 tv[0] = atime;
3474 tv[1] = mtime;
8334eb21
RS		 3475 return utimes (filename, tv);
3476#else /* not HAVE_UTIMES */
53ea491a
KH		 3477 struct utimbuf utb;
3478 utb.actime = EMACS_SECS (atime);
3479 utb.modtime = EMACS_SECS (mtime);
8334eb21
RS		 3480 return utime (filename, &utb);
3481#endif /* not HAVE_UTIMES */
53ea491a
KH		 3482}
3483\f
23524fb9
JB		 3484/* mkdir and rmdir functions, for systems which don't have them. */
3485
3486#ifndef HAVE_MKDIR
3487/*
3488 * Written by Robert Rother, Mariah Corporation, August 1985.
3489 *
3490 * If you want it, it's yours. All I ask in return is that if you
3491 * figure out how to do this in a Bourne Shell script you send me
3492 * a copy.
3493 * sdcsvax!rmr or rmr@uscd
3494 *
3495 * Severely hacked over by John Gilmore to make a 4.2BSD compatible
3496 * subroutine. 11Mar86; hoptoad!gnu
3497 *
3498 * Modified by rmtodd@uokmax 6-28-87 -- when making an already existing dir,
3499 * subroutine didn't return EEXIST. It does now.
3500 */
3501
3502/*
3503 * Make a directory.
3504 */
f3892946
RS		 3505#ifdef MKDIR_PROTOTYPE
3506MKDIR_PROTOTYPE
3507#else
23524fb9
JB		 3508int
3509mkdir (dpath, dmode)
3510 char *dpath;
3511 int dmode;
f3892946 3512#endif
23524fb9 3513{
039f26a4 3514 int cpid, status, fd;
23524fb9
JB		 3515 struct stat statbuf;
3516
3517 if (stat (dpath, &statbuf) == 0)
3518 {
3519 errno = EEXIST; /* Stat worked, so it already exists */
3520 return -1;
3521 }
3522
3523 /* If stat fails for a reason other than non-existence, return error */
3524 if (errno != ENOENT)
3525 return -1;
3526
039f26a4 3527 synch_process_alive = 1;
23524fb9
JB		 3528 switch (cpid = fork ())
3529 {
3530
039f26a4 3531 case -1: /* Error in fork */
23524fb9
JB		 3532 return (-1); /* Errno is set already */
3533
3534 case 0: /* Child process */
3535 /*
3536 * Cheap hack to set mode of new directory. Since this
3537 * child process is going away anyway, we zap its umask.
3538 * FIXME, this won't suffice to set SUID, SGID, etc. on this
3539 * directory. Does anybody care?
3540 */
3541 status = umask (0); /* Get current umask */
3542 status = umask (status | (0777 & ~dmode)); /* Set for mkdir */
039f26a4
RS		 3543 fd = sys_open("/dev/null", 2);
3544 if (fd >= 0)
3545 {
3546 dup2 (fd, 0);
3547 dup2 (fd, 1);
3548 dup2 (fd, 2);
3549 }
23524fb9
JB		 3550 execl ("/bin/mkdir", "mkdir", dpath, (char *) 0);
3551 _exit (-1); /* Can't exec /bin/mkdir */
3552
3553 default: /* Parent process */
039f26a4 3554 wait_for_termination (cpid);
23524fb9
JB		 3555 }
3556
039f26a4 3557 if (synch_process_death != 0 || synch_process_retcode != 0)
23524fb9
JB		 3558 {
3559 errno = EIO; /* We don't know why, but */
3560 return -1; /* /bin/mkdir failed */
3561 }
3562
3563 return 0;
3564}
3565#endif /* not HAVE_MKDIR */
3566
3567#ifndef HAVE_RMDIR
3568int
3569rmdir (dpath)
3570 char *dpath;
3571{
039f26a4 3572 int cpid, status, fd;
23524fb9
JB		 3573 struct stat statbuf;
3574
3575 if (stat (dpath, &statbuf) != 0)
3576 {
3577 /* Stat just set errno. We don't have to */
3578 return -1;
3579 }
3580
039f26a4 3581 synch_process_alive = 1;
23524fb9
JB		 3582 switch (cpid = fork ())
3583 {
3584
039f26a4 3585 case -1: /* Error in fork */
23524fb9
JB		 3586 return (-1); /* Errno is set already */
3587
3588 case 0: /* Child process */
039f26a4
RS		 3589 fd = sys_open("/dev/null", 2);
3590 if (fd >= 0)
3591 {
3592 dup2 (fd, 0);
3593 dup2 (fd, 1);
3594 dup2 (fd, 2);
3595 }
f560db78
RS		 3596 execl ("/bin/rmdir", "rmdir", dpath, (char *) 0);
3597 _exit (-1); /* Can't exec /bin/rmdir */
3598
207bdbdb 3599 default: /* Parent process */
f560db78 3600 wait_for_termination (cpid);
23524fb9
JB		 3601 }
3602
f560db78 3603 if (synch_process_death != 0 || synch_process_retcode != 0)
23524fb9
JB		 3604 {
3605 errno = EIO; /* We don't know why, but */
f560db78 3606 return -1; /* /bin/rmdir failed */
23524fb9
JB		 3607 }
3608
3609 return 0;
3610}
3611#endif /* !HAVE_RMDIR */
3612
3613
86a5659e
JB		 3614\f
3615/* Functions for VMS */
3616#ifdef VMS
91bac16a 3617#include "vms-pwd.h"
86a5659e
JB		 3618#include <acldef.h>
3619#include <chpdef.h>
3620#include <jpidef.h>
3621
3622/* Return as a string the VMS error string pertaining to STATUS.
3623 Reuses the same static buffer each time it is called. */
3624
3625char *
3626vmserrstr (status)
3627 int status; /* VMS status code */
3628{
3629 int bufadr[2];
3630 short len;
3631 static char buf[257];
3632
3633 bufadr[0] = sizeof buf - 1;
3634 bufadr[1] = (int) buf;
3635 if (! (SYS$GETMSG (status, &len, bufadr, 0x1, 0) & 1))
3636 return "untranslatable VMS error status";
3637 buf[len] = '\0';
3638 return buf;
3639}
3640
3641#ifdef access
3642#undef access
3643
3644/* The following is necessary because 'access' emulation by VMS C (2.0) does
3645 * not work correctly. (It also doesn't work well in version 2.3.)
3646 */
3647
3648#ifdef VMS4_4
3649
3650#define DESCRIPTOR(name,string) struct dsc$descriptor_s name = \
3651 { strlen (string), DSC$K_DTYPE_T, DSC$K_CLASS_S, string }
3652
3653typedef union {
3654 struct {
3655 unsigned short s_buflen;
3656 unsigned short s_code;
3657 char *s_bufadr;
3658 unsigned short *s_retlenadr;
3659 } s;
3660 int end;
3661} item;
3662#define buflen s.s_buflen
3663#define code s.s_code
3664#define bufadr s.s_bufadr
3665#define retlenadr s.s_retlenadr
3666
3667#define R_OK 4 /* test for read permission */
3668#define W_OK 2 /* test for write permission */
3669#define X_OK 1 /* test for execute (search) permission */
3670#define F_OK 0 /* test for presence of file */
3671
3672int
3673sys_access (path, mode)
3674 char *path;
3675 int mode;
3676{
3677 static char *user = NULL;
3678 char dir_fn[512];
3679
3680 /* translate possible directory spec into .DIR file name, so brain-dead
3681 * access can treat the directory like a file. */
3682 if (directory_file_name (path, dir_fn))
3683 path = dir_fn;
3684
3685 if (mode == F_OK)
3686 return access (path, mode);
3687 if (user == NULL && (user = (char *) getenv ("USER")) == NULL)
3688 return -1;
3689 {
3690 int stat;
3691 int flags;
3692 int acces;
3693 unsigned short int dummy;
3694 item itemlst[3];
3695 static int constant = ACL$C_FILE;
3696 DESCRIPTOR (path_desc, path);
3697 DESCRIPTOR (user_desc, user);
3698
3699 flags = 0;
3700 acces = 0;
3701 if ((mode & X_OK) && ((stat = access (path, mode)) < 0 || mode == X_OK))
3702 return stat;
3703 if (mode & R_OK)
3704 acces |= CHP$M_READ;
3705 if (mode & W_OK)
3706 acces |= CHP$M_WRITE;
3707 itemlst[0].buflen = sizeof (int);
3708 itemlst[0].code = CHP$_FLAGS;
3709 itemlst[0].bufadr = (char *) &flags;
3710 itemlst[0].retlenadr = &dummy;
3711 itemlst[1].buflen = sizeof (int);
3712 itemlst[1].code = CHP$_ACCESS;
3713 itemlst[1].bufadr = (char *) &acces;
3714 itemlst[1].retlenadr = &dummy;
3715 itemlst[2].end = CHP$_END;
3716 stat = SYS$CHECK_ACCESS (&constant, &path_desc, &user_desc, itemlst);
3717 return stat == SS$_NORMAL ? 0 : -1;
3718 }
3719}
3720
3721#else /* not VMS4_4 */
3722
3723#include <prvdef.h>
fe03522b
RS		 3724#define ACE$M_WRITE 2
3725#define ACE$C_KEYID 1
86a5659e
JB		 3726
3727static unsigned short memid, grpid;
3728static unsigned int uic;
3729
3730/* Called from init_sys_modes, so it happens not very often
3731 but at least each time Emacs is loaded. */
3732sys_access_reinit ()
3733{
3734 uic = 0;
3735}
3736
3737int
3738sys_access (filename, type)
3739 char * filename;
3740 int type;
3741{
3742 struct FAB fab;
3743 struct XABPRO xab;
3744 int status, size, i, typecode, acl_controlled;
3745 unsigned int *aclptr, *aclend, aclbuf[60];
3746 union prvdef prvmask;
3747
3748 /* Get UIC and GRP values for protection checking. */
3749 if (uic == 0)
3750 {
3751 status = LIB$GETJPI (&JPI$_UIC, 0, 0, &uic, 0, 0);
3752 if (! (status & 1))
3753 return -1;
3754 memid = uic & 0xFFFF;
3755 grpid = uic >> 16;
3756 }
3757
fe03522b 3758 if (type != 2) /* not checking write access */
86a5659e
JB		 3759 return access (filename, type);
3760
3761 /* Check write protection. */
3762
fe03522b 3763#define CHECKPRIV(bit) (prvmask.bit)
ea5a0917 3764#define WRITABLE(field) (! ((xab.xab$w_pro >> field) & XAB$M_NOWRITE))
86a5659e
JB		 3765
3766 /* Find privilege bits */
986ffb24 3767 status = SYS$SETPRV (0, 0, 0, prvmask);
86a5659e
JB		 3768 if (! (status & 1))
3769 error ("Unable to find privileges: %s", vmserrstr (status));
3770 if (CHECKPRIV (PRV$V_BYPASS))
3771 return 0; /* BYPASS enabled */
3772 fab = cc$rms_fab;
3773 fab.fab$b_fac = FAB$M_GET;
3774 fab.fab$l_fna = filename;
3775 fab.fab$b_fns = strlen (filename);
3776 fab.fab$l_xab = &xab;
3777 xab = cc$rms_xabpro;
3778 xab.xab$l_aclbuf = aclbuf;
3779 xab.xab$w_aclsiz = sizeof (aclbuf);
986ffb24 3780 status = SYS$OPEN (&fab, 0, 0);
86a5659e
JB		 3781 if (! (status & 1))
3782 return -1;
986ffb24 3783 SYS$CLOSE (&fab, 0, 0);
86a5659e 3784 /* Check system access */
ea5a0917 3785 if (CHECKPRIV (PRV$V_SYSPRV) && WRITABLE (XAB$V_SYS))
86a5659e
JB		 3786 return 0;
3787 /* Check ACL entries, if any */
3788 acl_controlled = 0;
3789 if (xab.xab$w_acllen > 0)
3790 {
3791 aclptr = aclbuf;
3792 aclend = &aclbuf[xab.xab$w_acllen / 4];
3793 while (*aclptr && aclptr < aclend)
3794 {
3795 size = (*aclptr & 0xff) / 4;
3796 typecode = (*aclptr >> 8) & 0xff;
3797 if (typecode == ACE$C_KEYID)
3798 for (i = size - 1; i > 1; i--)
3799 if (aclptr[i] == uic)
3800 {
3801 acl_controlled = 1;
3802 if (aclptr[1] & ACE$M_WRITE)
3803 return 0; /* Write access through ACL */
3804 }
3805 aclptr = &aclptr[size];
3806 }
3807 if (acl_controlled) /* ACL specified, prohibits write access */
3808 return -1;
3809 }
3810 /* No ACL entries specified, check normal protection */
ea5a0917 3811 if (WRITABLE (XAB$V_WLD)) /* World writable */
86a5659e 3812 return 0;
ea5a0917 3813 if (WRITABLE (XAB$V_GRP) &&
86a5659e 3814 (unsigned short) (xab.xab$l_uic >> 16) == grpid)
ea5a0917
KH		 3815 return 0; /* Group writable */
3816 if (WRITABLE (XAB$V_OWN) &&
86a5659e 3817 (xab.xab$l_uic & 0xFFFF) == memid)
ea5a0917 3818 return 0; /* Owner writable */
86a5659e 3819
ea5a0917 3820 return -1; /* Not writable */
86a5659e
JB		 3821}
3822#endif /* not VMS4_4 */
3823#endif /* access */
3824
3825static char vtbuf[NAM$C_MAXRSS+1];
3826
3827/* translate a vms file spec to a unix path */
3828char *
3829sys_translate_vms (vfile)
3830 char * vfile;
3831{
3832 char * p;
3833 char * targ;
3834
3835 if (!vfile)
3836 return 0;
3837
3838 targ = vtbuf;
3839
3840 /* leading device or logical name is a root directory */
3841 if (p = strchr (vfile, ':'))
3842 {
3843 *targ++ = '/';
3844 while (vfile < p)
3845 *targ++ = *vfile++;
3846 vfile++;
3847 *targ++ = '/';
3848 }
3849 p = vfile;
3850 if (*p == '[' || *p == '<')
3851 {
3852 while (*++vfile != *p + 2)
3853 switch (*vfile)
3854 {
3855 case '.':
3856 if (vfile[-1] == *p)
3857 *targ++ = '.';
3858 *targ++ = '/';
3859 break;
3860
3861 case '-':
3862 *targ++ = '.';
3863 *targ++ = '.';
3864 break;
3865
3866 default:
3867 *targ++ = *vfile;
3868 break;
3869 }
3870 vfile++;
3871 *targ++ = '/';
3872 }
3873 while (*vfile)
3874 *targ++ = *vfile++;
3875
3876 return vtbuf;
3877}
3878
3879static char utbuf[NAM$C_MAXRSS+1];
3880
3881/* translate a unix path to a VMS file spec */
3882char *
3883sys_translate_unix (ufile)
3884 char * ufile;
3885{
3886 int slash_seen = 0;
3887 char *p;
3888 char * targ;
3889
3890 if (!ufile)
3891 return 0;
3892
3893 targ = utbuf;
3894
3895 if (*ufile == '/')
3896 {
3897 ufile++;
3898 }
3899
3900 while (*ufile)
3901 {
3902 switch (*ufile)
3903 {
3904 case '/':
3905 if (slash_seen)
3906 if (index (&ufile[1], '/'))
3907 *targ++ = '.';
3908 else
3909 *targ++ = ']';
3910 else
3911 {
3912 *targ++ = ':';
3913 if (index (&ufile[1], '/'))
3914 *targ++ = '[';
3915 slash_seen = 1;
3916 }
3917 break;
3918
3919 case '.':
3920 if (strncmp (ufile, "./", 2) == 0)
3921 {
3922 if (!slash_seen)
3923 {
3924 *targ++ = '[';
3925 slash_seen = 1;
3926 }
3927 ufile++; /* skip the dot */
3928 if (index (&ufile[1], '/'))
3929 *targ++ = '.';
3930 else
3931 *targ++ = ']';
3932 }
3933 else if (strncmp (ufile, "../", 3) == 0)
3934 {
3935 if (!slash_seen)
3936 {
3937 *targ++ = '[';
3938 slash_seen = 1;
3939 }
3940 *targ++ = '-';
3941 ufile += 2; /* skip the dots */
3942 if (index (&ufile[1], '/'))
3943 *targ++ = '.';
3944 else
3945 *targ++ = ']';
3946 }
3947 else
3948 *targ++ = *ufile;
3949 break;
3950
3951 default:
3952 *targ++ = *ufile;
3953 break;
3954 }
3955 ufile++;
3956 }
3957 *targ = '\0';
3958
3959 return utbuf;
3960}
3961
3962char *
3963getwd (pathname)
3964 char *pathname;
3965{
f4a7e5bd 3966 char *ptr, *val;
210b2b4f 3967 extern char *getcwd ();
86a5659e 3968
210b2b4f
JB		 3969#define MAXPATHLEN 1024
3970
9ac0d9e0 3971 ptr = xmalloc (MAXPATHLEN);
f4a7e5bd
RS		 3972 val = getcwd (ptr, MAXPATHLEN);
3973 if (val == 0)
3974 {
3975 xfree (ptr);
3976 return val;
3977 }
210b2b4f 3978 strcpy (pathname, ptr);
9ac0d9e0 3979 xfree (ptr);
210b2b4f
JB		 3980
3981 return pathname;
86a5659e
JB		 3982}
3983
3984getppid ()
3985{
3986 long item_code = JPI$_OWNER;
3987 unsigned long parent_id;
3988 int status;
3989
3990 if (((status = LIB$GETJPI (&item_code, 0, 0, &parent_id)) & 1) == 0)
3991 {
3992 errno = EVMSERR;
3993 vaxc$errno = status;
3994 return -1;
3995 }
3996 return parent_id;
3997}
3998
3999#undef getuid
4000unsigned
4001sys_getuid ()
4002{
4003 return (getgid () << 16) | getuid ();
4004}
4005
4006int
4007sys_read (fildes, buf, nbyte)
4008 int fildes;
4009 char *buf;
4010 unsigned int nbyte;
4011{
4012 return read (fildes, buf, (nbyte < MAXIOSIZE ? nbyte : MAXIOSIZE));
4013}
4014
4015#if 0
4016int
4017sys_write (fildes, buf, nbyte)
4018 int fildes;
4019 char *buf;
4020 unsigned int nbyte;
4021{
4022 register int nwrote, rtnval = 0;
4023
4024 while (nbyte > MAXIOSIZE && (nwrote = write (fildes, buf, MAXIOSIZE)) > 0) {
4025 nbyte -= nwrote;
4026 buf += nwrote;
4027 rtnval += nwrote;
4028 }
4029 if (nwrote < 0)
4030 return rtnval ? rtnval : -1;
4031 if ((nwrote = write (fildes, buf, nbyte)) < 0)
4032 return rtnval ? rtnval : -1;
4033 return (rtnval + nwrote);
4034}
4035#endif /* 0 */
4036
4037/*
4038 * VAX/VMS VAX C RTL really loses. It insists that records
4039 * end with a newline (carriage return) character, and if they
4040 * don't it adds one (nice of it isn't it!)
4041 *
4042 * Thus we do this stupidity below.
4043 */
4044
4045int
4046sys_write (fildes, buf, nbytes)
4047 int fildes;
4048 char *buf;
4049 unsigned int nbytes;
4050{
4051 register char *p;
4052 register char *e;
23b0668c
JB		 4053 int sum = 0;
4054 struct stat st;
4055
4056 fstat (fildes, &st);
86a5659e 4057 p = buf;
86a5659e
JB		 4058 while (nbytes > 0)
4059 {
23b0668c
JB		 4060 int len, retval;
4061
4062 /* Handle fixed-length files with carriage control. */
4063 if (st.st_fab_rfm == FAB$C_FIX
4064 && ((st.st_fab_rat & (FAB$M_FTN | FAB$M_CR)) != 0))
4065 {
4066 len = st.st_fab_mrs;
4067 retval = write (fildes, p, min (len, nbytes));
4068 if (retval != len)
4069 return -1;
4070 retval++; /* This skips the implied carriage control */
4071 }
4072 else
4073 {
4074 e = p + min (MAXIOSIZE, nbytes) - 1;
4075 while (*e != '\n' && e > p) e--;
4076 if (p == e) /* Ok.. so here we add a newline... sigh. */
4077 e = p + min (MAXIOSIZE, nbytes) - 1;
4078 len = e + 1 - p;
4079 retval = write (fildes, p, len);
4080 if (retval != len)
4081 return -1;
4082 }
4083 p += retval;
4084 sum += retval;
86a5659e
JB		 4085 nbytes -= retval;
4086 }
4087 return sum;
4088}
4089
4090/* Create file NEW copying its attributes from file OLD. If
4091 OLD is 0 or does not exist, create based on the value of
4092 vms_stmlf_recfm. */
4093
4094/* Protection value the file should ultimately have.
4095 Set by create_copy_attrs, and use by rename_sansversions. */
4096static unsigned short int fab_final_pro;
4097
4098int
4099creat_copy_attrs (old, new)
4100 char *old, *new;
4101{
4102 struct FAB fab = cc$rms_fab;
4103 struct XABPRO xabpro;
4104 char aclbuf[256]; /* Choice of size is arbitrary. See below. */
4105 extern int vms_stmlf_recfm;
4106
4107 if (old)
4108 {
4109 fab.fab$b_fac = FAB$M_GET;
4110 fab.fab$l_fna = old;
4111 fab.fab$b_fns = strlen (old);
4112 fab.fab$l_xab = (char *) &xabpro;
4113 xabpro = cc$rms_xabpro;
4114 xabpro.xab$l_aclbuf = aclbuf;
4115 xabpro.xab$w_aclsiz = sizeof aclbuf;
4116 /* Call $OPEN to fill in the fab & xabpro fields. */
986ffb24 4117 if (SYS$OPEN (&fab, 0, 0) & 1)
86a5659e 4118 {
986ffb24 4119 SYS$CLOSE (&fab, 0, 0);
86a5659e
JB		 4120 fab.fab$l_alq = 0; /* zero the allocation quantity */
4121 if (xabpro.xab$w_acllen > 0)
4122 {
4123 if (xabpro.xab$w_acllen > sizeof aclbuf)
4124 /* If the acl buffer was too short, redo open with longer one.
4125 Wouldn't need to do this if there were some system imposed
4126 limit on the size of an ACL, but I can't find any such. */
4127 {
4128 xabpro.xab$l_aclbuf = (char *) alloca (xabpro.xab$w_acllen);
4129 xabpro.xab$w_aclsiz = xabpro.xab$w_acllen;
986ffb24
JB		 4130 if (SYS$OPEN (&fab, 0, 0) & 1)
4131 SYS$CLOSE (&fab, 0, 0);
86a5659e
JB		 4132 else
4133 old = 0;
4134 }
4135 }
4136 else
4137 xabpro.xab$l_aclbuf = 0;
4138 }
4139 else
4140 old = 0;
4141 }
4142 fab.fab$l_fna = new;
4143 fab.fab$b_fns = strlen (new);
4144 if (!old)
4145 {
4146 fab.fab$l_xab = 0;
4147 fab.fab$b_rfm = vms_stmlf_recfm ? FAB$C_STMLF : FAB$C_VAR;
4148 fab.fab$b_rat = FAB$M_CR;
4149 }
4150
4151 /* Set the file protections such that we will be able to manipulate
4152 this file. Once we are done writing and renaming it, we will set
4153 the protections back. */
4154 if (old)
4155 fab_final_pro = xabpro.xab$w_pro;
4156 else
986ffb24 4157 SYS$SETDFPROT (0, &fab_final_pro);
86a5659e
JB		 4158 xabpro.xab$w_pro &= 0xff0f; /* set O:rewd for now. This is set back later. */
4159
4160 /* Create the new file with either default attrs or attrs copied
4161 from old file. */
4162 if (!(SYS$CREATE (&fab, 0, 0) & 1))
4163 return -1;
986ffb24 4164 SYS$CLOSE (&fab, 0, 0);
86a5659e
JB		 4165 /* As this is a "replacement" for creat, return a file descriptor
4166 opened for writing. */
4167 return open (new, O_WRONLY);
4168}
4169
4170#ifdef creat
4171#undef creat
4172#include <varargs.h>
4173#ifdef __GNUC__
4174#ifndef va_count
4175#define va_count(X) ((X) = *(((int *) &(va_alist)) - 1))
4176#endif
4177#endif
4178
4179sys_creat (va_alist)
4180 va_dcl
4181{
eb8c3be9 4182 va_list list_incrementer;
86a5659e
JB		 4183 char *name;
4184 int mode;
4185 int rfd; /* related file descriptor */
4186 int fd; /* Our new file descriptor */
4187 int count;
4188 struct stat st_buf;
4189 char rfm[12];
4190 char rat[15];
4191 char mrs[13];
4192 char fsz[13];
4193 extern int vms_stmlf_recfm;
4194
4195 va_count (count);
eb8c3be9
JB		 4196 va_start (list_incrementer);
4197 name = va_arg (list_incrementer, char *);
4198 mode = va_arg (list_incrementer, int);
86a5659e 4199 if (count > 2)
eb8c3be9
JB		 4200 rfd = va_arg (list_incrementer, int);
4201 va_end (list_incrementer);
86a5659e
JB		 4202 if (count > 2)
4203 {
4204 /* Use information from the related file descriptor to set record
4205 format of the newly created file. */
4206 fstat (rfd, &st_buf);
4207 switch (st_buf.st_fab_rfm)
4208 {
4209 case FAB$C_FIX:
4210 strcpy (rfm, "rfm = fix");
4211 sprintf (mrs, "mrs = %d", st_buf.st_fab_mrs);
4212 strcpy (rat, "rat = ");
4213 if (st_buf.st_fab_rat & FAB$M_CR)
4214 strcat (rat, "cr");
4215 else if (st_buf.st_fab_rat & FAB$M_FTN)
4216 strcat (rat, "ftn");
4217 else if (st_buf.st_fab_rat & FAB$M_PRN)
4218 strcat (rat, "prn");
4219 if (st_buf.st_fab_rat & FAB$M_BLK)
4220 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4221 strcat (rat, ", blk");
4222 else
4223 strcat (rat, "blk");
4224 return creat (name, 0, rfm, rat, mrs);
4225
4226 case FAB$C_VFC:
4227 strcpy (rfm, "rfm = vfc");
4228 sprintf (fsz, "fsz = %d", st_buf.st_fab_fsz);
4229 strcpy (rat, "rat = ");
4230 if (st_buf.st_fab_rat & FAB$M_CR)
4231 strcat (rat, "cr");
4232 else if (st_buf.st_fab_rat & FAB$M_FTN)
4233 strcat (rat, "ftn");
4234 else if (st_buf.st_fab_rat & FAB$M_PRN)
4235 strcat (rat, "prn");
4236 if (st_buf.st_fab_rat & FAB$M_BLK)
4237 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4238 strcat (rat, ", blk");
4239 else
4240 strcat (rat, "blk");
4241 return creat (name, 0, rfm, rat, fsz);
4242
4243 case FAB$C_STM:
4244 strcpy (rfm, "rfm = stm");
4245 break;
4246
4247 case FAB$C_STMCR:
4248 strcpy (rfm, "rfm = stmcr");
4249 break;
4250
4251 case FAB$C_STMLF:
4252 strcpy (rfm, "rfm = stmlf");
4253 break;
4254
4255 case FAB$C_UDF:
4256 strcpy (rfm, "rfm = udf");
4257 break;
4258
4259 case FAB$C_VAR:
4260 strcpy (rfm, "rfm = var");
4261 break;
4262 }
4263 strcpy (rat, "rat = ");
4264 if (st_buf.st_fab_rat & FAB$M_CR)
4265 strcat (rat, "cr");
4266 else if (st_buf.st_fab_rat & FAB$M_FTN)
4267 strcat (rat, "ftn");
4268 else if (st_buf.st_fab_rat & FAB$M_PRN)
4269 strcat (rat, "prn");
4270 if (st_buf.st_fab_rat & FAB$M_BLK)
4271 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4272 strcat (rat, ", blk");
4273 else
4274 strcat (rat, "blk");
4275 }
4276 else
4277 {
4278 strcpy (rfm, vms_stmlf_recfm ? "rfm = stmlf" : "rfm=var");
4279 strcpy (rat, "rat=cr");
4280 }
4281 /* Until the VAX C RTL fixes the many bugs with modes, always use
4282 mode 0 to get the user's default protection. */
4283 fd = creat (name, 0, rfm, rat);
4284 if (fd < 0 && errno == EEXIST)
4285 {
4286 if (unlink (name) < 0)
4287 report_file_error ("delete", build_string (name));
4288 fd = creat (name, 0, rfm, rat);
4289 }
4290 return fd;
4291}
4292#endif /* creat */
4293
4294/* fwrite to stdout is S L O W. Speed it up by using fputc...*/
4295sys_fwrite (ptr, size, num, fp)
4296 register char * ptr;
4297 FILE * fp;
4298{
4299 register int tot = num * size;
4300
4301 while (tot--)
4302 fputc (*ptr++, fp);
4303}
4304
4305/*
4306 * The VMS C library routine creat actually creates a new version of an
4307 * existing file rather than truncating the old version. There are times
4308 * when this is not the desired behavior, for instance, when writing an
4309 * auto save file (you only want one version), or when you don't have
4310 * write permission in the directory containing the file (but the file
4311 * itself is writable). Hence this routine, which is equivalent to
4312 * "close (creat (fn, 0));" on Unix if fn already exists.
4313 */
4314int
4315vms_truncate (fn)
4316 char *fn;
4317{
4318 struct FAB xfab = cc$rms_fab;
4319 struct RAB xrab = cc$rms_rab;
4320 int status;
4321
4322 xfab.fab$l_fop = FAB$M_TEF; /* free allocated but unused blocks on close */
4323 xfab.fab$b_fac = FAB$M_TRN | FAB$M_GET; /* allow truncate and get access */
4324 xfab.fab$b_shr = FAB$M_NIL; /* allow no sharing - file must be locked */
4325 xfab.fab$l_fna = fn;
4326 xfab.fab$b_fns = strlen (fn);
4327 xfab.fab$l_dna = ";0"; /* default to latest version of the file */
4328 xfab.fab$b_dns = 2;
4329 xrab.rab$l_fab = &xfab;
4330
4331 /* This gibberish opens the file, positions to the first record, and
4332 deletes all records from there until the end of file. */
986ffb24 4333 if ((SYS$OPEN (&xfab) & 01) == 01)
86a5659e 4334 {
986ffb24
JB		 4335 if ((SYS$CONNECT (&xrab) & 01) == 01 &&
4336 (SYS$FIND (&xrab) & 01) == 01 &&
4337 (SYS$TRUNCATE (&xrab) & 01) == 01)
86a5659e
JB		 4338 status = 0;
4339 else
4340 status = -1;
4341 }
4342 else
4343 status = -1;
986ffb24 4344 SYS$CLOSE (&xfab);
86a5659e
JB		 4345 return status;
4346}
4347
4348/* Define this symbol to actually read SYSUAF.DAT. This requires either
4349 SYSPRV or a readable SYSUAF.DAT. */
4350
4351#ifdef READ_SYSUAF
4352/*
4353 * getuaf.c
4354 *
4355 * Routine to read the VMS User Authorization File and return
4356 * a specific user's record.
4357 */
4358
4359static struct UAF retuaf;
4360
4361struct UAF *
4362get_uaf_name (uname)
4363 char * uname;
4364{
4365 register status;
4366 struct FAB uaf_fab;
4367 struct RAB uaf_rab;
4368
4369 uaf_fab = cc$rms_fab;
4370 uaf_rab = cc$rms_rab;
4371 /* initialize fab fields */
4372 uaf_fab.fab$l_fna = "SYS$SYSTEM:SYSUAF.DAT";
4373 uaf_fab.fab$b_fns = 21;
4374 uaf_fab.fab$b_fac = FAB$M_GET;
4375 uaf_fab.fab$b_org = FAB$C_IDX;
4376 uaf_fab.fab$b_shr = FAB$M_GET|FAB$M_PUT|FAB$M_UPD|FAB$M_DEL;
4377 /* initialize rab fields */
4378 uaf_rab.rab$l_fab = &uaf_fab;
4379 /* open the User Authorization File */
986ffb24 4380 status = SYS$OPEN (&uaf_fab);
86a5659e
JB		 4381 if (!(status&1))
4382 {
4383 errno = EVMSERR;
4384 vaxc$errno = status;
4385 return 0;
4386 }
986ffb24 4387 status = SYS$CONNECT (&uaf_rab);
86a5659e
JB		 4388 if (!(status&1))
4389 {
4390 errno = EVMSERR;
4391 vaxc$errno = status;
4392 return 0;
4393 }
4394 /* read the requested record - index is in uname */
4395 uaf_rab.rab$l_kbf = uname;
4396 uaf_rab.rab$b_ksz = strlen (uname);
4397 uaf_rab.rab$b_rac = RAB$C_KEY;
4398 uaf_rab.rab$l_ubf = (char *)&retuaf;
4399 uaf_rab.rab$w_usz = sizeof retuaf;
986ffb24 4400 status = SYS$GET (&uaf_rab);
86a5659e
JB		 4401 if (!(status&1))
4402 {
4403 errno = EVMSERR;
4404 vaxc$errno = status;
4405 return 0;
4406 }
4407 /* close the User Authorization File */
986ffb24 4408 status = SYS$DISCONNECT (&uaf_rab);
86a5659e
JB		 4409 if (!(status&1))
4410 {
4411 errno = EVMSERR;
4412 vaxc$errno = status;
4413 return 0;
4414 }
986ffb24 4415 status = SYS$CLOSE (&uaf_fab);
86a5659e
JB		 4416 if (!(status&1))
4417 {
4418 errno = EVMSERR;
4419 vaxc$errno = status;
4420 return 0;
4421 }
4422 return &retuaf;
4423}
4424
4425struct UAF *
4426get_uaf_uic (uic)
4427 unsigned long uic;
4428{
4429 register status;
4430 struct FAB uaf_fab;
4431 struct RAB uaf_rab;
4432
4433 uaf_fab = cc$rms_fab;
4434 uaf_rab = cc$rms_rab;
4435 /* initialize fab fields */
4436 uaf_fab.fab$l_fna = "SYS$SYSTEM:SYSUAF.DAT";
4437 uaf_fab.fab$b_fns = 21;
4438 uaf_fab.fab$b_fac = FAB$M_GET;
4439 uaf_fab.fab$b_org = FAB$C_IDX;
4440 uaf_fab.fab$b_shr = FAB$M_GET|FAB$M_PUT|FAB$M_UPD|FAB$M_DEL;
4441 /* initialize rab fields */
4442 uaf_rab.rab$l_fab = &uaf_fab;
4443 /* open the User Authorization File */
986ffb24 4444 status = SYS$OPEN (&uaf_fab);
86a5659e
JB		 4445 if (!(status&1))
4446 {
4447 errno = EVMSERR;
4448 vaxc$errno = status;
4449 return 0;
4450 }
986ffb24 4451 status = SYS$CONNECT (&uaf_rab);
86a5659e
JB		 4452 if (!(status&1))
4453 {
4454 errno = EVMSERR;
4455 vaxc$errno = status;
4456 return 0;
4457 }
4458 /* read the requested record - index is in uic */
4459 uaf_rab.rab$b_krf = 1; /* 1st alternate key */
4460 uaf_rab.rab$l_kbf = (char *) &uic;
4461 uaf_rab.rab$b_ksz = sizeof uic;
4462 uaf_rab.rab$b_rac = RAB$C_KEY;
4463 uaf_rab.rab$l_ubf = (char *)&retuaf;
4464 uaf_rab.rab$w_usz = sizeof retuaf;
986ffb24 4465 status = SYS$GET (&uaf_rab);
86a5659e
JB		 4466 if (!(status&1))
4467 {
4468 errno = EVMSERR;
4469 vaxc$errno = status;
4470 return 0;
4471 }
4472 /* close the User Authorization File */
986ffb24 4473 status = SYS$DISCONNECT (&uaf_rab);
86a5659e
JB		 4474 if (!(status&1))
4475 {
4476 errno = EVMSERR;
4477 vaxc$errno = status;
4478 return 0;
4479 }
986ffb24 4480 status = SYS$CLOSE (&uaf_fab);
86a5659e
JB		 4481 if (!(status&1))
4482 {
4483 errno = EVMSERR;
4484 vaxc$errno = status;
4485 return 0;
4486 }
4487 return &retuaf;
4488}
4489
4490static struct passwd retpw;
4491
4492struct passwd *
4493cnv_uaf_pw (up)
4494 struct UAF * up;
4495{
4496 char * ptr;
4497
4498 /* copy these out first because if the username is 32 chars, the next
4499 section will overwrite the first byte of the UIC */
4500 retpw.pw_uid = up->uaf$w_mem;
4501 retpw.pw_gid = up->uaf$w_grp;
4502
ea5a0917 4503 /* I suppose this is not the best style, to possibly overwrite one
86a5659e
JB		 4504 byte beyond the end of the field, but what the heck... */
4505 ptr = &up->uaf$t_username[UAF$S_USERNAME];
4506 while (ptr[-1] == ' ')
4507 ptr--;
4508 *ptr = '\0';
4509 strcpy (retpw.pw_name, up->uaf$t_username);
4510
4511 /* the rest of these are counted ascii strings */
4512 strncpy (retpw.pw_gecos, &up->uaf$t_owner[1], up->uaf$t_owner[0]);
4513 retpw.pw_gecos[up->uaf$t_owner[0]] = '\0';
4514 strncpy (retpw.pw_dir, &up->uaf$t_defdev[1], up->uaf$t_defdev[0]);
4515 retpw.pw_dir[up->uaf$t_defdev[0]] = '\0';
4516 strncat (retpw.pw_dir, &up->uaf$t_defdir[1], up->uaf$t_defdir[0]);
4517 retpw.pw_dir[up->uaf$t_defdev[0] + up->uaf$t_defdir[0]] = '\0';
4518 strncpy (retpw.pw_shell, &up->uaf$t_defcli[1], up->uaf$t_defcli[0]);
4519 retpw.pw_shell[up->uaf$t_defcli[0]] = '\0';
4520
4521 return &retpw;
4522}
4523#else /* not READ_SYSUAF */
4524static struct passwd retpw;
4525#endif /* not READ_SYSUAF */
4526
4527struct passwd *
4528getpwnam (name)
4529 char * name;
4530{
4531#ifdef READ_SYSUAF
4532 struct UAF *up;
4533#else
4534 char * user;
4535 char * dir;
4536 unsigned char * full;
4537#endif /* READ_SYSUAF */
4538 char *ptr = name;
4539
4540 while (*ptr)
4541 {
4542 if ('a' <= *ptr && *ptr <= 'z')
4543 *ptr -= 040;
4544 ptr++;
4545 }
4546#ifdef READ_SYSUAF
4547 if (!(up = get_uaf_name (name)))
4548 return 0;
4549 return cnv_uaf_pw (up);
4550#else
4551 if (strcmp (name, getenv ("USER")) == 0)
4552 {
4553 retpw.pw_uid = getuid ();
4554 retpw.pw_gid = getgid ();
4555 strcpy (retpw.pw_name, name);
4556 if (full = egetenv ("FULLNAME"))
4557 strcpy (retpw.pw_gecos, full);
4558 else
4559 *retpw.pw_gecos = '\0';
4560 strcpy (retpw.pw_dir, egetenv ("HOME"));
4561 *retpw.pw_shell = '\0';
4562 return &retpw;
4563 }
4564 else
4565 return 0;
4566#endif /* not READ_SYSUAF */
4567}
4568
4569struct passwd *
4570getpwuid (uid)
4571 unsigned long uid;
4572{
4573#ifdef READ_SYSUAF
4574 struct UAF * up;
4575
4576 if (!(up = get_uaf_uic (uid)))
4577 return 0;
4578 return cnv_uaf_pw (up);
4579#else
4580 if (uid == sys_getuid ())
4581 return getpwnam (egetenv ("USER"));
4582 else
4583 return 0;
4584#endif /* not READ_SYSUAF */
4585}
4586
4587/* return total address space available to the current process. This is
4588 the sum of the current p0 size, p1 size and free page table entries
4589 available. */
4590vlimit ()
4591{
4592 int item_code;
4593 unsigned long free_pages;
4594 unsigned long frep0va;
4595 unsigned long frep1va;
4596 register status;
4597
4598 item_code = JPI$_FREPTECNT;
4599 if (((status = LIB$GETJPI (&item_code, 0, 0, &free_pages)) & 1) == 0)
4600 {
4601 errno = EVMSERR;
4602 vaxc$errno = status;
4603 return -1;
4604 }
4605 free_pages *= 512;
4606
4607 item_code = JPI$_FREP0VA;
4608 if (((status = LIB$GETJPI (&item_code, 0, 0, &frep0va)) & 1) == 0)
4609 {
4610 errno = EVMSERR;
4611 vaxc$errno = status;
4612 return -1;
4613 }
4614 item_code = JPI$_FREP1VA;
4615 if (((status = LIB$GETJPI (&item_code, 0, 0, &frep1va)) & 1) == 0)
4616 {
4617 errno = EVMSERR;
4618 vaxc$errno = status;
4619 return -1;
4620 }
4621
4622 return free_pages + frep0va + (0x7fffffff - frep1va);
4623}
4624
4625define_logical_name (varname, string)
4626 char *varname;
4627 char *string;
4628{
4629 struct dsc$descriptor_s strdsc =
4630 {strlen (string), DSC$K_DTYPE_T, DSC$K_CLASS_S, string};
4631 struct dsc$descriptor_s envdsc =
4632 {strlen (varname), DSC$K_DTYPE_T, DSC$K_CLASS_S, varname};
4633 struct dsc$descriptor_s lnmdsc =
4634 {7, DSC$K_DTYPE_T, DSC$K_CLASS_S, "LNM$JOB"};
4635
4636 return LIB$SET_LOGICAL (&envdsc, &strdsc, &lnmdsc, 0, 0);
4637}
4638
4639delete_logical_name (varname)
4640 char *varname;
4641{
4642 struct dsc$descriptor_s envdsc =
4643 {strlen (varname), DSC$K_DTYPE_T, DSC$K_CLASS_S, varname};
4644 struct dsc$descriptor_s lnmdsc =
4645 {7, DSC$K_DTYPE_T, DSC$K_CLASS_S, "LNM$JOB"};
4646
4647 return LIB$DELETE_LOGICAL (&envdsc, &lnmdsc);
4648}
4649
4650ulimit ()
4651{}
4652
86a5659e
JB		 4653setpgrp ()
4654{}
4655
4656execvp ()
4657{
4658 error ("execvp system call not implemented");
4659}
4660
4661int
4662rename (from, to)
4663 char *from, *to;
4664{
4665 int status;
4666 struct FAB from_fab = cc$rms_fab, to_fab = cc$rms_fab;
4667 struct NAM from_nam = cc$rms_nam, to_nam = cc$rms_nam;
4668 char from_esn[NAM$C_MAXRSS];
4669 char to_esn[NAM$C_MAXRSS];
4670
4671 from_fab.fab$l_fna = from;
4672 from_fab.fab$b_fns = strlen (from);
4673 from_fab.fab$l_nam = &from_nam;
4674 from_fab.fab$l_fop = FAB$M_NAM;
4675
4676 from_nam.nam$l_esa = from_esn;
4677 from_nam.nam$b_ess = sizeof from_esn;
4678
4679 to_fab.fab$l_fna = to;
4680 to_fab.fab$b_fns = strlen (to);
4681 to_fab.fab$l_nam = &to_nam;
4682 to_fab.fab$l_fop = FAB$M_NAM;
4683
4684 to_nam.nam$l_esa = to_esn;
4685 to_nam.nam$b_ess = sizeof to_esn;
4686
4687 status = SYS$RENAME (&from_fab, 0, 0, &to_fab);
4688
4689 if (status & 1)
4690 return 0;
4691 else
4692 {
4693 if (status == RMS$_DEV)
4694 errno = EXDEV;
4695 else
4696 errno = EVMSERR;
4697 vaxc$errno = status;
4698 return -1;
4699 }
4700}
4701
4702/* This function renames a file like `rename', but it strips
4703 the version number from the "to" filename, such that the "to" file is
4704 will always be a new version. It also sets the file protection once it is
4705 finished. The protection that we will use is stored in fab_final_pro,
4706 and was set when we did a creat_copy_attrs to create the file that we
4707 are renaming.
4708
4709 We could use the chmod function, but Eunichs uses 3 bits per user category
eb8c3be9 4710 to describe the protection, and VMS uses 4 (write and delete are separate
86a5659e
JB		 4711 bits). To maintain portability, the VMS implementation of `chmod' wires
4712 the W and D bits together. */
4713
4714
4715static struct fibdef fib; /* We need this initialized to zero */
4716char vms_file_written[NAM$C_MAXRSS];
4717
4718int
4719rename_sans_version (from,to)
4720 char *from, *to;
4721{
4722 short int chan;
4723 int stat;
4724 short int iosb[4];
4725 int status;
4726 struct FAB to_fab = cc$rms_fab;
4727 struct NAM to_nam = cc$rms_nam;
4728 struct dsc$descriptor fib_d ={sizeof (fib),0,0,(char*) &fib};
4729 struct dsc$descriptor fib_attr[2]
4730 = {{sizeof (fab_final_pro),ATR$C_FPRO,0,(char*) &fab_final_pro},{0,0,0,0}};
4731 char to_esn[NAM$C_MAXRSS];
4732
4733 $DESCRIPTOR (disk,to_esn);
4734
4735 to_fab.fab$l_fna = to;
4736 to_fab.fab$b_fns = strlen (to);
4737 to_fab.fab$l_nam = &to_nam;
4738 to_fab.fab$l_fop = FAB$M_NAM;
4739
4740 to_nam.nam$l_esa = to_esn;
4741 to_nam.nam$b_ess = sizeof to_esn;
4742
4743 status = SYS$PARSE (&to_fab, 0, 0); /* figure out the full file name */
4744
4745 if (to_nam.nam$l_fnb && NAM$M_EXP_VER)
4746 *(to_nam.nam$l_ver) = '\0';
4747
4748 stat = rename (from, to_esn);
4749 if (stat < 0)
4750 return stat;
4751
4752 strcpy (vms_file_written, to_esn);
4753
4754 to_fab.fab$l_fna = vms_file_written; /* this points to the versionless name */
4755 to_fab.fab$b_fns = strlen (vms_file_written);
4756
4757 /* Now set the file protection to the correct value */
986ffb24 4758 SYS$OPEN (&to_fab, 0, 0); /* This fills in the nam$w_fid fields */
86a5659e
JB		 4759
4760 /* Copy these fields into the fib */
4761 fib.fib$r_fid_overlay.fib$w_fid[0] = to_nam.nam$w_fid[0];
4762 fib.fib$r_fid_overlay.fib$w_fid[1] = to_nam.nam$w_fid[1];
4763 fib.fib$r_fid_overlay.fib$w_fid[2] = to_nam.nam$w_fid[2];
4764
986ffb24 4765 SYS$CLOSE (&to_fab, 0, 0);
86a5659e 4766
986ffb24 4767 stat = SYS$ASSIGN (&disk, &chan, 0, 0); /* open a channel to the disk */
86a5659e 4768 if (!stat)
986ffb24
JB		 4769 LIB$SIGNAL (stat);
4770 stat = SYS$QIOW (0, chan, IO$_MODIFY, iosb, 0, 0, &fib_d,
86a5659e
JB		 4771 0, 0, 0, &fib_attr, 0);
4772 if (!stat)
986ffb24
JB		 4773 LIB$SIGNAL (stat);
4774 stat = SYS$DASSGN (chan);
86a5659e 4775 if (!stat)
986ffb24 4776 LIB$SIGNAL (stat);
0137dbf7 4777 strcpy (vms_file_written, to_esn); /* We will write this to the terminal*/
86a5659e
JB		 4778 return 0;
4779}
4780
4781link (file, new)
4782 char * file, * new;
4783{
4784 register status;
4785 struct FAB fab;
4786 struct NAM nam;
4787 unsigned short fid[3];
4788 char esa[NAM$C_MAXRSS];
4789
4790 fab = cc$rms_fab;
4791 fab.fab$l_fop = FAB$M_OFP;
4792 fab.fab$l_fna = file;
4793 fab.fab$b_fns = strlen (file);
4794 fab.fab$l_nam = &nam;
4795
4796 nam = cc$rms_nam;
4797 nam.nam$l_esa = esa;
4798 nam.nam$b_ess = NAM$C_MAXRSS;
4799
4800 status = SYS$PARSE (&fab);
4801 if ((status & 1) == 0)
4802 {
4803 errno = EVMSERR;
4804 vaxc$errno = status;
4805 return -1;
4806 }
4807 status = SYS$SEARCH (&fab);
4808 if ((status & 1) == 0)
4809 {
4810 errno = EVMSERR;
4811 vaxc$errno = status;
4812 return -1;
4813 }
4814
4815 fid[0] = nam.nam$w_fid[0];
4816 fid[1] = nam.nam$w_fid[1];
4817 fid[2] = nam.nam$w_fid[2];
4818
4819 fab.fab$l_fna = new;
4820 fab.fab$b_fns = strlen (new);
4821
4822 status = SYS$PARSE (&fab);
4823 if ((status & 1) == 0)
4824 {
4825 errno = EVMSERR;
4826 vaxc$errno = status;
4827 return -1;
4828 }
4829
4830 nam.nam$w_fid[0] = fid[0];
4831 nam.nam$w_fid[1] = fid[1];
4832 nam.nam$w_fid[2] = fid[2];
4833
4834 nam.nam$l_esa = nam.nam$l_name;
4835 nam.nam$b_esl = nam.nam$b_name + nam.nam$b_type + nam.nam$b_ver;
4836
4837 status = SYS$ENTER (&fab);
4838 if ((status & 1) == 0)
4839 {
4840 errno = EVMSERR;
4841 vaxc$errno = status;
4842 return -1;
4843 }
4844
4845 return 0;
4846}
4847
4848croak (badfunc)
4849 char *badfunc;
4850{
4851 printf ("%s not yet implemented\r\n", badfunc);
4852 reset_sys_modes ();
4853 exit (1);
4854}
4855
4856long
4857random ()
4858{
4859 /* Arrange to return a range centered on zero. */
4860 return rand () - (1 << 30);
4861}
4862
4863srandom (seed)
4864{
4865 srand (seed);
4866}
4867#endif /* VMS */
4868\f
b97ab886 4869#ifdef AIXHFT
86a5659e
JB		 4870
4871/* Called from init_sys_modes. */
4872hft_init ()
4873{
4874 int junk;
4875
4876 /* If we're not on an HFT we shouldn't do any of this. We determine
4877 if we are on an HFT by trying to get an HFT error code. If this
4878 call fails, we're not on an HFT. */
4879#ifdef IBMR2AIX
4880 if (ioctl (0, HFQERROR, &junk) < 0)
4881 return;
4882#else /* not IBMR2AIX */
4883 if (ioctl (0, HFQEIO, 0) < 0)
4884 return;
4885#endif /* not IBMR2AIX */
4886
4887 /* On AIX the default hft keyboard mapping uses backspace rather than delete
4888 as the rubout key's ASCII code. Here this is changed. The bug is that
4889 there's no way to determine the old mapping, so in reset_sys_modes
4890 we need to assume that the normal map had been present. Of course, this
4891 code also doesn't help if on a terminal emulator which doesn't understand
4892 HFT VTD's. */
4893 {
4894 struct hfbuf buf;
4895 struct hfkeymap keymap;
4896
4897 buf.hf_bufp = (char *)&keymap;
4898 buf.hf_buflen = sizeof (keymap);
4899 keymap.hf_nkeys = 2;
4900 keymap.hfkey[0].hf_kpos = 15;
4901 keymap.hfkey[0].hf_kstate = HFMAPCHAR | HFSHFNONE;
4902#ifdef IBMR2AIX
4903 keymap.hfkey[0].hf_keyidh = '<';
4904#else /* not IBMR2AIX */
4905 keymap.hfkey[0].hf_page = '<';
4906#endif /* not IBMR2AIX */
4907 keymap.hfkey[0].hf_char = 127;
4908 keymap.hfkey[1].hf_kpos = 15;
4909 keymap.hfkey[1].hf_kstate = HFMAPCHAR | HFSHFSHFT;
4910#ifdef IBMR2AIX
4911 keymap.hfkey[1].hf_keyidh = '<';
4912#else /* not IBMR2AIX */
4913 keymap.hfkey[1].hf_page = '<';
4914#endif /* not IBMR2AIX */
4915 keymap.hfkey[1].hf_char = 127;
4916 hftctl (0, HFSKBD, &buf);
4917 }
4918 /* The HFT system on AIX doesn't optimize for scrolling, so it's really ugly
4919 at times. */
4920 line_ins_del_ok = char_ins_del_ok = 0;
4921}
4922
4923/* Reset the rubout key to backspace. */
4924
4925hft_reset ()
4926{
4927 struct hfbuf buf;
4928 struct hfkeymap keymap;
4929 int junk;
4930
4931#ifdef IBMR2AIX
4932 if (ioctl (0, HFQERROR, &junk) < 0)
4933 return;
4934#else /* not IBMR2AIX */
4935 if (ioctl (0, HFQEIO, 0) < 0)
4936 return;
4937#endif /* not IBMR2AIX */
4938
4939 buf.hf_bufp = (char *)&keymap;
4940 buf.hf_buflen = sizeof (keymap);
4941 keymap.hf_nkeys = 2;
4942 keymap.hfkey[0].hf_kpos = 15;
4943 keymap.hfkey[0].hf_kstate = HFMAPCHAR | HFSHFNONE;
4944#ifdef IBMR2AIX
4945 keymap.hfkey[0].hf_keyidh = '<';
4946#else /* not IBMR2AIX */
4947 keymap.hfkey[0].hf_page = '<';
4948#endif /* not IBMR2AIX */
4949 keymap.hfkey[0].hf_char = 8;
4950 keymap.hfkey[1].hf_kpos = 15;
4951 keymap.hfkey[1].hf_kstate = HFMAPCHAR | HFSHFSHFT;
4952#ifdef IBMR2AIX
4953 keymap.hfkey[1].hf_keyidh = '<';
4954#else /* not IBMR2AIX */
4955 keymap.hfkey[1].hf_page = '<';
4956#endif /* not IBMR2AIX */
4957 keymap.hfkey[1].hf_char = 8;
4958 hftctl (0, HFSKBD, &buf);
4959}
4960
b97ab886 4961#endif /* AIXHFT */
c238be24
RS		 4962
4963#ifdef USE_DL_STUBS
4964
4965/* These are included on Sunos 4.1 when we do not use shared libraries.
4966 X11 libraries may refer to these functions but (we hope) do not
4967 actually call them. */
4968
4969void *
4970dlopen ()
4971{
4972 return 0;
4973}
4974
4975void *
4976dlsym ()
4977{
4978 return 0;
4979}
4980
4981int
4982dlclose ()
4983{
4984 return -1;
4985}
4986
4987#endif /* USE_DL_STUBS */
51417996
RS		 4988\f
4989#ifndef BSTRING
4990
4991#ifndef bzero
4992
4993void
4994bzero (b, length)
4995 register char *b;
4996 register int length;
4997{
4998#ifdef VMS
4999 short zero = 0;
5000 long max_str = 65535;
5001
5002 while (length > max_str) {
5003 (void) LIB$MOVC5 (&zero, &zero, &zero, &max_str, b);
5004 length -= max_str;
5005 b += max_str;
5006 }
5007 max_str = length;
5008 (void) LIB$MOVC5 (&zero, &zero, &zero, &max_str, b);
5009#else
5010 while (length-- > 0)
5011 *b++ = 0;
5012#endif /* not VMS */
5013}
5014
5015#endif /* no bzero */
5016#endif /* BSTRING */
5017
c7f93f28 5018#if (!defined (BSTRING) && !defined (bcopy)) || defined (NEED_BCOPY)
51417996
RS		 5019#undef bcopy
5020
5021/* Saying `void' requires a declaration, above, where bcopy is used
5022 and that declaration causes pain for systems where bcopy is a macro. */
5023bcopy (b1, b2, length)
5024 register char *b1;
5025 register char *b2;
5026 register int length;
5027{
5028#ifdef VMS
5029 long max_str = 65535;
5030
5031 while (length > max_str) {
5032 (void) LIB$MOVC3 (&max_str, b1, b2);
5033 length -= max_str;
5034 b1 += max_str;
5035 b2 += max_str;
5036 }
5037 max_str = length;
5038 (void) LIB$MOVC3 (&length, b1, b2);
5039#else
5040 while (length-- > 0)
5041 *b2++ = *b1++;
5042#endif /* not VMS */
5043}
5044#endif /* (defined (BSTRING) && !defined (bcopy)) || defined (NEED_BCOPY) */
5045
c7f93f28 5046#ifndef BSTRING
51417996
RS		 5047#ifndef bcmp
5048int
5049bcmp (b1, b2, length) /* This could be a macro! */
5050 register char *b1;
5051 register char *b2;
5052 register int length;
5053{
5054#ifdef VMS
5055 struct dsc$descriptor_s src1 = {length, DSC$K_DTYPE_T, DSC$K_CLASS_S, b1};
5056 struct dsc$descriptor_s src2 = {length, DSC$K_DTYPE_T, DSC$K_CLASS_S, b2};
5057
5058 return STR$COMPARE (&src1, &src2);
5059#else
5060 while (length-- > 0)
5061 if (*b1++ != *b2++)
5062 return 1;
5063
5064 return 0;
5065#endif /* not VMS */
5066}
5067#endif /* no bcmp */
5068#endif /* not BSTRING */
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