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