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