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[gnu-emacs] / 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, 675 Mass Ave, Cambridge, MA 02139, USA. */
19
20
21 #include <signal.h>
22 #include <setjmp.h>
23
24 #include <config.h>
25 #include "lisp.h"
26 #include "blockinput.h"
27 #undef NULL
28
29 #define min(x,y) ((x) > (y) ? (y) : (x))
30
31 /* In this file, open, read and write refer to the system calls,
32 not our sugared interfaces sys_open, sys_read and sys_write.
33 Contrariwise, for systems where we use the system calls directly,
34 define sys_read, etc. here as aliases for them. */
35 #ifndef read
36 #define sys_read read
37 #define sys_write write
38 #endif /* `read' is not a macro */
39
40 #undef read
41 #undef write
42
43 #ifdef WINDOWSNT
44 #define read _read
45 #define write _write
46 #include <windows.h>
47 extern int errno;
48 #endif /* not WINDOWSNT */
49
50 #ifndef close
51 #define sys_close close
52 #else
53 #undef close
54 #endif
55
56 #ifndef open
57 #define sys_open open
58 #else /* `open' is a macro */
59 #undef open
60 #endif /* `open' is a macro */
61
62 /* Does anyone other than VMS need this? */
63 #ifndef fwrite
64 #define sys_fwrite fwrite
65 #else
66 #undef fwrite
67 #endif
68
69 #ifndef HAVE_H_ERRNO
70 extern int h_errno;
71 #endif
72
73 #include <stdio.h>
74 #include <sys/types.h>
75 #include <sys/stat.h>
76 #include <errno.h>
77
78 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida, MW Aug 1993 */
79 #include <dos.h>
80 #include "dosfns.h"
81 #include "msdos.h"
82 #include <sys/param.h>
83 #endif
84
85 extern int errno;
86
87 #ifdef VMS
88 #include <rms.h>
89 #include <ttdef.h>
90 #include <tt2def.h>
91 #include <iodef.h>
92 #include <ssdef.h>
93 #include <descrip.h>
94 #include <fibdef.h>
95 #include <atrdef.h>
96 #include <ctype.h>
97 #include <string.h>
98 #ifdef __GNUC__
99 #include <sys/file.h>
100 #else
101 #include <file.h>
102 #endif
103 #undef F_SETFL
104 #ifndef RAB$C_BID
105 #include <rab.h>
106 #endif
107 #define MAXIOSIZE (32 * PAGESIZE) /* Don't I/O more than 32 blocks at a time */
108 #endif /* VMS */
109
110 #ifndef BSD4_1
111 #ifdef BSD /* this is done this way to avoid defined (BSD) || defined (USG)
112 because the vms compiler doesn't grok `defined' */
113 #include <fcntl.h>
114 #endif
115 #ifdef USG
116 #ifndef USG5
117 #include <fcntl.h>
118 #endif
119 #endif
120 #endif /* not 4.1 bsd */
121
122 #ifndef MSDOS
123 #include <sys/ioctl.h>
124 #endif
125 #include "systty.h"
126 #include "syswait.h"
127
128 #ifdef BROKEN_TIOCGWINSZ
129 #undef TIOCGWINSZ
130 #undef TIOCSWINSZ
131 #endif
132
133 #ifdef USG
134 #include <sys/utsname.h>
135 #include <string.h>
136 #ifndef MEMORY_IN_STRING_H
137 #include <memory.h>
138 #endif
139 #if defined (TIOCGWINSZ) || defined (ISC4_0)
140 #ifdef NEED_SIOCTL
141 #include <sys/sioctl.h>
142 #endif
143 #ifdef NEED_PTEM_H
144 #include <sys/stream.h>
145 #include <sys/ptem.h>
146 #endif
147 #endif /* TIOCGWINSZ or ISC4_0 */
148 #endif /* USG */
149
150 extern int quit_char;
151
152 #include "frame.h"
153 #include "window.h"
154 #include "termhooks.h"
155 #include "termchar.h"
156 #include "termopts.h"
157 #include "dispextern.h"
158 #include "process.h"
159
160 #ifdef WINDOWSNT
161 #include <direct.h>
162 /* In process.h which conflicts with the local copy. */
163 #define _P_WAIT 0
164 int _CRTAPI1 _spawnlp (int, const char *, const char *, ...);
165 int _CRTAPI1 _getpid (void);
166 #endif
167
168 #ifdef NONSYSTEM_DIR_LIBRARY
169 #include "ndir.h"
170 #endif /* NONSYSTEM_DIR_LIBRARY */
171
172 #include "syssignal.h"
173 #include "systime.h"
174 #ifdef HAVE_UTIME_H
175 #include <utime.h>
176 #endif
177
178 #ifndef HAVE_UTIMES
179 #ifndef HAVE_STRUCT_UTIMBUF
180 /* We want to use utime rather than utimes, but we couldn't find the
181 structure declaration. We'll use the traditional one. */
182 struct utimbuf {
183 long actime;
184 long modtime;
185 };
186 #endif
187 #endif
188
189 /* LPASS8 is new in 4.3, and makes cbreak mode provide all 8 bits. */
190 #ifndef LPASS8
191 #define LPASS8 0
192 #endif
193
194 #ifdef BSD4_1
195 #define LNOFLSH 0100000
196 #endif
197
198 static int baud_convert[] =
199 #ifdef BAUD_CONVERT
200 BAUD_CONVERT;
201 #else
202 {
203 0, 50, 75, 110, 135, 150, 200, 300, 600, 1200,
204 1800, 2400, 4800, 9600, 19200, 38400
205 };
206 #endif
207
208 extern short ospeed;
209
210 /* The file descriptor for Emacs's input terminal.
211 Under Unix, this is normally zero except when using X;
212 under VMS, we place the input channel number here. */
213 int input_fd;
214 \f
215 /* Specify a different file descriptor for further input operations. */
216
217 void
218 change_input_fd (fd)
219 int fd;
220 {
221 input_fd = fd;
222 }
223
224 /* Discard pending input on descriptor input_fd. */
225
226 discard_tty_input ()
227 {
228 #ifndef WINDOWSNT
229 struct emacs_tty buf;
230
231 if (noninteractive)
232 return;
233
234 /* Discarding input is not safe when the input could contain
235 replies from the X server. So don't do it. */
236 if (read_socket_hook)
237 return;
238
239 #ifdef VMS
240 end_kbd_input ();
241 SYS$QIOW (0, input_fd, IO$_READVBLK|IO$M_PURGE, input_iosb, 0, 0,
242 &buf.main, 0, 0, terminator_mask, 0, 0);
243 queue_kbd_input ();
244 #else /* not VMS */
245 #ifdef APOLLO
246 {
247 int zero = 0;
248 ioctl (input_fd, TIOCFLUSH, &zero);
249 }
250 #else /* not Apollo */
251 #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */
252 while (dos_keyread () != -1)
253 ;
254 #else /* not MSDOS */
255 EMACS_GET_TTY (input_fd, &buf);
256 EMACS_SET_TTY (input_fd, &buf, 0);
257 #endif /* not MSDOS */
258 #endif /* not Apollo */
259 #endif /* not VMS */
260 #endif /* not WINDOWSNT */
261 }
262
263 #ifdef SIGTSTP
264
265 /* Arrange for character C to be read as the next input from
266 the terminal. */
267
268 stuff_char (c)
269 char c;
270 {
271 if (read_socket_hook)
272 return;
273
274 /* Should perhaps error if in batch mode */
275 #ifdef TIOCSTI
276 ioctl (input_fd, TIOCSTI, &c);
277 #else /* no TIOCSTI */
278 error ("Cannot stuff terminal input characters in this version of Unix");
279 #endif /* no TIOCSTI */
280 }
281
282 #endif /* SIGTSTP */
283 \f
284 init_baud_rate ()
285 {
286 if (noninteractive)
287 ospeed = 0;
288 else
289 {
290 #ifdef DOS_NT
291 ospeed = 15;
292 #else /* not DOS_NT */
293 #ifdef VMS
294 struct sensemode sg;
295
296 SYS$QIOW (0, input_fd, IO$_SENSEMODE, &sg, 0, 0,
297 &sg.class, 12, 0, 0, 0, 0 );
298 ospeed = sg.xmit_baud;
299 #else /* not VMS */
300 #ifdef HAVE_TERMIOS
301 struct termios sg;
302
303 sg.c_cflag = B9600;
304 tcgetattr (input_fd, &sg);
305 ospeed = cfgetospeed (&sg);
306 #if defined (USE_GETOBAUD) && defined (getobaud)
307 /* m88k-motorola-sysv3 needs this (ghazi@noc.rutgers.edu) 9/1/94. */
308 if (ospeed == 0)
309 ospeed = getobaud (sg.c_cflag);
310 #endif
311 #else /* neither VMS nor TERMIOS */
312 #ifdef HAVE_TERMIO
313 struct termio sg;
314
315 sg.c_cflag = B9600;
316 #ifdef HAVE_TCATTR
317 tcgetattr (input_fd, &sg);
318 #else
319 ioctl (input_fd, TCGETA, &sg);
320 #endif
321 ospeed = sg.c_cflag & CBAUD;
322 #else /* neither VMS nor TERMIOS nor TERMIO */
323 struct sgttyb sg;
324
325 sg.sg_ospeed = B9600;
326 if (ioctl (input_fd, TIOCGETP, &sg) < 0)
327 abort ();
328 ospeed = sg.sg_ospeed;
329 #endif /* not HAVE_TERMIO */
330 #endif /* not HAVE_TERMIOS */
331 #endif /* not VMS */
332 #endif /* not DOS_NT */
333 }
334
335 baud_rate = (ospeed < sizeof baud_convert / sizeof baud_convert[0]
336 ? baud_convert[ospeed] : 9600);
337 if (baud_rate == 0)
338 baud_rate = 1200;
339 }
340
341 /*ARGSUSED*/
342 set_exclusive_use (fd)
343 int fd;
344 {
345 #ifdef FIOCLEX
346 ioctl (fd, FIOCLEX, 0);
347 #endif
348 /* Ok to do nothing if this feature does not exist */
349 }
350 \f
351 #ifndef subprocesses
352
353 wait_without_blocking ()
354 {
355 #ifdef BSD
356 wait3 (0, WNOHANG | WUNTRACED, 0);
357 #else
358 croak ("wait_without_blocking");
359 #endif
360 synch_process_alive = 0;
361 }
362
363 #endif /* not subprocesses */
364
365 int wait_debugging; /* Set nonzero to make following function work under dbx
366 (at least for bsd). */
367
368 SIGTYPE
369 wait_for_termination_signal ()
370 {}
371
372 /* Wait for subprocess with process id `pid' to terminate and
373 make sure it will get eliminated (not remain forever as a zombie) */
374
375 wait_for_termination (pid)
376 int pid;
377 {
378 while (1)
379 {
380 #ifdef subprocesses
381 #ifdef VMS
382 int status;
383
384 status = SYS$FORCEX (&pid, 0, 0);
385 break;
386 #else /* not VMS */
387 #if defined (BSD) || (defined (HPUX) && !defined (HPUX_5))
388 /* Note that kill returns -1 even if the process is just a zombie now.
389 But inevitably a SIGCHLD interrupt should be generated
390 and child_sig will do wait3 and make the process go away. */
391 /* There is some indication that there is a bug involved with
392 termination of subprocesses, perhaps involving a kernel bug too,
393 but no idea what it is. Just as a hunch we signal SIGCHLD to see
394 if that causes the problem to go away or get worse. */
395 sigsetmask (sigmask (SIGCHLD));
396 if (0 > kill (pid, 0))
397 {
398 sigsetmask (SIGEMPTYMASK);
399 kill (getpid (), SIGCHLD);
400 break;
401 }
402 if (wait_debugging)
403 sleep (1);
404 else
405 sigpause (SIGEMPTYMASK);
406 #else /* not BSD, and not HPUX version >= 6 */
407 #if defined (UNIPLUS)
408 if (0 > kill (pid, 0))
409 break;
410 wait (0);
411 #else /* neither BSD nor UNIPLUS: random sysV */
412 #ifdef POSIX_SIGNALS /* would this work for LINUX as well? */
413 sigblock (sigmask (SIGCHLD));
414 if (0 > kill (pid, 0))
415 {
416 sigunblock (sigmask (SIGCHLD));
417 break;
418 }
419 sigpause (SIGEMPTYMASK);
420 #else /* not POSIX_SIGNALS */
421 #ifdef HAVE_SYSV_SIGPAUSE
422 sighold (SIGCHLD);
423 if (0 > kill (pid, 0))
424 {
425 sigrelse (SIGCHLD);
426 break;
427 }
428 sigpause (SIGCHLD);
429 #else /* not HAVE_SYSV_SIGPAUSE */
430 #ifdef WINDOWSNT
431 wait (0);
432 break;
433 #else /* not WINDOWSNT */
434 if (0 > kill (pid, 0))
435 break;
436 /* Using sleep instead of pause avoids timing error.
437 If the inferior dies just before the sleep,
438 we lose just one second. */
439 sleep (1);
440 #endif /* not WINDOWSNT */
441 #endif /* not HAVE_SYSV_SIGPAUSE */
442 #endif /* not POSIX_SIGNALS */
443 #endif /* not UNIPLUS */
444 #endif /* not BSD, and not HPUX version >= 6 */
445 #endif /* not VMS */
446 #else /* not subprocesses */
447 #ifndef BSD4_1
448 if (kill (pid, 0) < 0)
449 break;
450 wait (0);
451 #else /* BSD4_1 */
452 int status;
453 status = wait (0);
454 if (status == pid || status == -1)
455 break;
456 #endif /* BSD4_1 */
457 #endif /* not subprocesses */
458 }
459 }
460
461 #ifdef subprocesses
462
463 /*
464 * flush any pending output
465 * (may flush input as well; it does not matter the way we use it)
466 */
467
468 flush_pending_output (channel)
469 int channel;
470 {
471 #ifdef HAVE_TERMIOS
472 /* If we try this, we get hit with SIGTTIN, because
473 the child's tty belongs to the child's pgrp. */
474 #else
475 #ifdef TCFLSH
476 ioctl (channel, TCFLSH, 1);
477 #else
478 #ifdef TIOCFLUSH
479 int zero = 0;
480 /* 3rd arg should be ignored
481 but some 4.2 kernels actually want the address of an int
482 and nonzero means something different. */
483 ioctl (channel, TIOCFLUSH, &zero);
484 #endif
485 #endif
486 #endif
487 }
488 \f
489 #ifndef VMS
490 /* Set up the terminal at the other end of a pseudo-terminal that
491 we will be controlling an inferior through.
492 It should not echo or do line-editing, since that is done
493 in Emacs. No padding needed for insertion into an Emacs buffer. */
494
495 child_setup_tty (out)
496 int out;
497 {
498 #ifndef DOS_NT
499 struct emacs_tty s;
500
501 EMACS_GET_TTY (out, &s);
502
503 #if defined (HAVE_TERMIO) || defined (HAVE_TERMIOS)
504 s.main.c_oflag |= OPOST; /* Enable output postprocessing */
505 s.main.c_oflag &= ~ONLCR; /* Disable map of NL to CR-NL on output */
506 #ifdef NLDLY
507 s.main.c_oflag &= ~(NLDLY|CRDLY|TABDLY|BSDLY|VTDLY|FFDLY);
508 /* No output delays */
509 #endif
510 s.main.c_lflag &= ~ECHO; /* Disable echo */
511 s.main.c_lflag |= ISIG; /* Enable signals */
512 #ifdef IUCLC
513 s.main.c_iflag &= ~IUCLC; /* Disable downcasing on input. */
514 #endif
515 #ifdef OLCUC
516 s.main.c_oflag &= ~OLCUC; /* Disable upcasing on output. */
517 #endif
518 s.main.c_cflag = (s.main.c_cflag & ~CSIZE) | CS8; /* Don't strip 8th bit */
519 #if 0
520 /* Said to be unnecessary: */
521 s.main.c_cc[VMIN] = 1; /* minimum number of characters to accept */
522 s.main.c_cc[VTIME] = 0; /* wait forever for at least 1 character */
523 #endif
524
525 s.main.c_lflag |= ICANON; /* Enable erase/kill and eof processing */
526 s.main.c_cc[VEOF] = 04; /* insure that EOF is Control-D */
527 s.main.c_cc[VERASE] = CDISABLE; /* disable erase processing */
528 s.main.c_cc[VKILL] = CDISABLE; /* disable kill processing */
529
530 #ifdef HPUX
531 s.main.c_cflag = (s.main.c_cflag & ~CBAUD) | B9600; /* baud rate sanity */
532 #endif /* HPUX */
533
534 #ifdef AIX
535 /* AIX enhanced edit loses NULs, so disable it */
536 #ifndef IBMR2AIX
537 s.main.c_line = 0;
538 s.main.c_iflag &= ~ASCEDIT;
539 #endif
540 /* Also, PTY overloads NUL and BREAK.
541 don't ignore break, but don't signal either, so it looks like NUL. */
542 s.main.c_iflag &= ~IGNBRK;
543 s.main.c_iflag &= ~BRKINT;
544 /* QUIT and INTR work better as signals, so disable character forms */
545 s.main.c_cc[VINTR] = 0377;
546 #ifdef SIGNALS_VIA_CHARACTERS
547 /* the QUIT and INTR character are used in process_send_signal
548 so set them here to something useful. */
549 if (s.main.c_cc[VQUIT] == 0377)
550 s.main.c_cc[VQUIT] = '\\'&037; /* Control-\ */
551 if (s.main.c_cc[VINTR] == 0377)
552 s.main.c_cc[VINTR] = 'C'&037; /* Control-C */
553 #else /* no TIOCGPGRP or no TIOCGLTC or no TIOCGETC */
554 /* QUIT and INTR work better as signals, so disable character forms */
555 s.main.c_cc[VQUIT] = 0377;
556 s.main.c_cc[VINTR] = 0377;
557 s.main.c_lflag &= ~ISIG;
558 #endif /* no TIOCGPGRP or no TIOCGLTC or no TIOCGETC */
559 s.main.c_cc[VEOL] = 0377;
560 s.main.c_cflag = (s.main.c_cflag & ~CBAUD) | B9600; /* baud rate sanity */
561 #endif /* AIX */
562
563 #else /* not HAVE_TERMIO */
564
565 s.main.sg_flags &= ~(ECHO | CRMOD | ANYP | ALLDELAY | RAW | LCASE
566 | CBREAK | TANDEM);
567 s.main.sg_flags |= LPASS8;
568 s.main.sg_erase = 0377;
569 s.main.sg_kill = 0377;
570 s.lmode = LLITOUT | s.lmode; /* Don't strip 8th bit */
571
572 #endif /* not HAVE_TERMIO */
573
574 EMACS_SET_TTY (out, &s, 0);
575
576 #ifdef BSD4_1
577 if (interrupt_input)
578 reset_sigio ();
579 #endif /* BSD4_1 */
580 #ifdef RTU
581 {
582 int zero = 0;
583 ioctl (out, FIOASYNC, &zero);
584 }
585 #endif /* RTU */
586 #endif /* not DOS_NT */
587 }
588 #endif /* not VMS */
589
590 #endif /* subprocesses */
591 \f
592 /* Record a signal code and the handler for it. */
593 struct save_signal
594 {
595 int code;
596 SIGTYPE (*handler) ();
597 };
598
599 /* Suspend the Emacs process; give terminal to its superior. */
600
601 sys_suspend ()
602 {
603 #ifdef VMS
604 /* "Foster" parentage allows emacs to return to a subprocess that attached
605 to the current emacs as a cheaper than starting a whole new process. This
606 is set up by KEPTEDITOR.COM. */
607 unsigned long parent_id, foster_parent_id;
608 char *fpid_string;
609
610 fpid_string = getenv ("EMACS_PARENT_PID");
611 if (fpid_string != NULL)
612 {
613 sscanf (fpid_string, "%x", &foster_parent_id);
614 if (foster_parent_id != 0)
615 parent_id = foster_parent_id;
616 else
617 parent_id = getppid ();
618 }
619 else
620 parent_id = getppid ();
621
622 xfree (fpid_string); /* On VMS, this was malloc'd */
623
624 if (parent_id && parent_id != 0xffffffff)
625 {
626 SIGTYPE (*oldsig)() = (int) signal (SIGINT, SIG_IGN);
627 int status = LIB$ATTACH (&parent_id) & 1;
628 signal (SIGINT, oldsig);
629 return status;
630 }
631 else
632 {
633 struct {
634 int l;
635 char *a;
636 } d_prompt;
637 d_prompt.l = sizeof ("Emacs: "); /* Our special prompt */
638 d_prompt.a = "Emacs: "; /* Just a reminder */
639 LIB$SPAWN (0, 0, 0, 0, 0, 0, 0, 0, 0, 0, &d_prompt, 0);
640 return 1;
641 }
642 return -1;
643 #else
644 #if defined(SIGTSTP) && !defined(MSDOS)
645
646 {
647 int pgrp = EMACS_GETPGRP (0);
648 EMACS_KILLPG (pgrp, SIGTSTP);
649 }
650
651 #else /* No SIGTSTP */
652 #ifdef USG_JOBCTRL /* If you don't know what this is don't mess with it */
653 ptrace (0, 0, 0, 0); /* set for ptrace - caught by csh */
654 kill (getpid (), SIGQUIT);
655
656 #else /* No SIGTSTP or USG_JOBCTRL */
657
658 /* On a system where suspending is not implemented,
659 instead fork a subshell and let it talk directly to the terminal
660 while we wait. */
661 sys_subshell ();
662
663 #endif /* no USG_JOBCTRL */
664 #endif /* no SIGTSTP */
665 #endif /* not VMS */
666 }
667
668 /* Fork a subshell. */
669
670 sys_subshell ()
671 {
672 #ifndef VMS
673 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */
674 int st;
675 char oldwd[MAXPATHLEN+1]; /* Fixed length is safe on MSDOS. */
676 #endif
677 int pid;
678 struct save_signal saved_handlers[5];
679 Lisp_Object dir;
680 unsigned char *str = 0;
681 int len;
682
683 saved_handlers[0].code = SIGINT;
684 saved_handlers[1].code = SIGQUIT;
685 saved_handlers[2].code = SIGTERM;
686 #ifdef SIGIO
687 saved_handlers[3].code = SIGIO;
688 saved_handlers[4].code = 0;
689 #else
690 saved_handlers[3].code = 0;
691 #endif
692
693 /* Mentioning current_buffer->buffer would mean including buffer.h,
694 which somehow wedges the hp compiler. So instead... */
695
696 dir = intern ("default-directory");
697 if (NILP (Fboundp (dir)))
698 goto xyzzy;
699 dir = Fsymbol_value (dir);
700 if (!STRINGP (dir))
701 goto xyzzy;
702
703 dir = expand_and_dir_to_file (Funhandled_file_name_directory (dir), Qnil);
704 str = (unsigned char *) alloca (XSTRING (dir)->size + 2);
705 len = XSTRING (dir)->size;
706 bcopy (XSTRING (dir)->data, str, len);
707 if (str[len - 1] != '/') str[len++] = '/';
708 str[len] = 0;
709 xyzzy:
710
711 #ifdef WINDOWSNT
712 pid = -1;
713 #else /* not WINDOWSNT */
714 pid = vfork ();
715
716 if (pid == -1)
717 error ("Can't spawn subshell");
718 if (pid == 0)
719 #endif /* not WINDOWSNT */
720 {
721 char *sh;
722
723 #ifdef MSDOS /* MW, Aug 1993 */
724 getwd (oldwd);
725 #endif
726 sh = (char *) egetenv ("SHELL");
727 if (sh == 0)
728 sh = "sh";
729
730 /* Use our buffer's default directory for the subshell. */
731 if (str)
732 chdir (str);
733
734 #ifdef subprocesses
735 close_process_descs (); /* Close Emacs's pipes/ptys */
736 #endif
737
738 #ifdef SET_EMACS_PRIORITY
739 {
740 extern int emacs_priority;
741
742 if (emacs_priority < 0)
743 nice (-emacs_priority);
744 }
745 #endif
746
747 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */
748 st = system (sh);
749 chdir (oldwd);
750 if (st)
751 report_file_error ("Can't execute subshell", Fcons (build_string (sh), Qnil));
752 #else /* not MSDOS */
753 #ifdef WINDOWSNT
754 restore_console ();
755
756 /* Waits for process completion */
757 pid = _spawnlp (_P_WAIT, sh, sh, NULL);
758 if (pid == -1)
759 write (1, "Can't execute subshell", 22);
760
761 take_console ();
762 #else /* not WINDOWSNT */
763 execlp (sh, sh, 0);
764 write (1, "Can't execute subshell", 22);
765 _exit (1);
766 #endif /* not WINDOWSNT */
767 #endif /* not MSDOS */
768 }
769
770 save_signal_handlers (saved_handlers);
771 synch_process_alive = 1;
772 wait_for_termination (pid);
773 restore_signal_handlers (saved_handlers);
774 #endif /* !VMS */
775 }
776
777 save_signal_handlers (saved_handlers)
778 struct save_signal *saved_handlers;
779 {
780 while (saved_handlers->code)
781 {
782 saved_handlers->handler
783 = (SIGTYPE (*) ()) signal (saved_handlers->code, SIG_IGN);
784 saved_handlers++;
785 }
786 }
787
788 restore_signal_handlers (saved_handlers)
789 struct save_signal *saved_handlers;
790 {
791 while (saved_handlers->code)
792 {
793 signal (saved_handlers->code, saved_handlers->handler);
794 saved_handlers++;
795 }
796 }
797 \f
798 #ifdef F_SETFL
799
800 int old_fcntl_flags;
801
802 init_sigio (fd)
803 int fd;
804 {
805 #ifdef FASYNC
806 old_fcntl_flags = fcntl (fd, F_GETFL, 0) & ~FASYNC;
807 fcntl (fd, F_SETFL, old_fcntl_flags | FASYNC);
808 #endif
809 interrupts_deferred = 0;
810 }
811
812 reset_sigio ()
813 {
814 unrequest_sigio ();
815 }
816
817 #ifdef FASYNC /* F_SETFL does not imply existence of FASYNC */
818
819 request_sigio ()
820 {
821 if (read_socket_hook)
822 return;
823
824 #ifdef SIGWINCH
825 sigunblock (sigmask (SIGWINCH));
826 #endif
827 fcntl (input_fd, F_SETFL, old_fcntl_flags | FASYNC);
828
829 interrupts_deferred = 0;
830 }
831
832 unrequest_sigio ()
833 {
834 if (read_socket_hook)
835 return;
836
837 #ifdef SIGWINCH
838 sigblock (sigmask (SIGWINCH));
839 #endif
840 fcntl (input_fd, F_SETFL, old_fcntl_flags);
841 interrupts_deferred = 1;
842 }
843
844 #else /* no FASYNC */
845 #ifdef STRIDE /* Stride doesn't have FASYNC - use FIOASYNC */
846
847 request_sigio ()
848 {
849 int on = 1;
850
851 if (read_socket_hook)
852 return;
853
854 ioctl (input_fd, FIOASYNC, &on);
855 interrupts_deferred = 0;
856 }
857
858 unrequest_sigio ()
859 {
860 int off = 0;
861
862 if (read_socket_hook)
863 return;
864
865 ioctl (input_fd, FIOASYNC, &off);
866 interrupts_deferred = 1;
867 }
868
869 #else /* not FASYNC, not STRIDE */
870
871 #ifdef _CX_UX
872
873 #include <termios.h>
874
875 request_sigio ()
876 {
877 int on = 1;
878 sigset_t st;
879
880 if (read_socket_hook)
881 return;
882
883 sigemptyset(&st);
884 sigaddset(&st, SIGIO);
885 ioctl (input_fd, FIOASYNC, &on);
886 interrupts_deferred = 0;
887 sigprocmask(SIG_UNBLOCK, &st, (sigset_t *)0);
888 }
889
890 unrequest_sigio ()
891 {
892 int off = 0;
893
894 if (read_socket_hook)
895 return;
896
897 ioctl (input_fd, FIOASYNC, &off);
898 interrupts_deferred = 1;
899 }
900
901 #else /* ! _CX_UX */
902
903 request_sigio ()
904 {
905 if (read_socket_hook)
906 return;
907
908 croak ("request_sigio");
909 }
910
911 unrequest_sigio ()
912 {
913 if (read_socket_hook)
914 return;
915
916 croak ("unrequest_sigio");
917 }
918
919 #endif /* _CX_UX */
920 #endif /* STRIDE */
921 #endif /* FASYNC */
922 #endif /* F_SETFL */
923 \f
924 /* Saving and restoring the process group of Emacs's terminal. */
925
926 #ifdef BSD_PGRPS
927
928 /* The process group of which Emacs was a member when it initially
929 started.
930
931 If Emacs was in its own process group (i.e. inherited_pgroup ==
932 getpid ()), then we know we're running under a shell with job
933 control (Emacs would never be run as part of a pipeline).
934 Everything is fine.
935
936 If Emacs was not in its own process group, then we know we're
937 running under a shell (or a caller) that doesn't know how to
938 separate itself from Emacs (like sh). Emacs must be in its own
939 process group in order to receive SIGIO correctly. In this
940 situation, we put ourselves in our own pgroup, forcibly set the
941 tty's pgroup to our pgroup, and make sure to restore and reinstate
942 the tty's pgroup just like any other terminal setting. If
943 inherited_group was not the tty's pgroup, then we'll get a
944 SIGTTmumble when we try to change the tty's pgroup, and a CONT if
945 it goes foreground in the future, which is what should happen. */
946 int inherited_pgroup;
947
948 /* Split off the foreground process group to Emacs alone.
949 When we are in the foreground, but not started in our own process
950 group, redirect the TTY to point to our own process group. We need
951 to be in our own process group to receive SIGIO properly. */
952 narrow_foreground_group ()
953 {
954 int me = getpid ();
955
956 setpgrp (0, inherited_pgroup);
957 if (inherited_pgroup != me)
958 EMACS_SET_TTY_PGRP (input_fd, &me);
959 setpgrp (0, me);
960 }
961
962 /* Set the tty to our original foreground group. */
963 widen_foreground_group ()
964 {
965 if (inherited_pgroup != getpid ())
966 EMACS_SET_TTY_PGRP (input_fd, &inherited_pgroup);
967 setpgrp (0, inherited_pgroup);
968 }
969
970 #endif /* BSD_PGRPS */
971 \f
972 /* Getting and setting emacs_tty structures. */
973
974 /* Set *TC to the parameters associated with the terminal FD.
975 Return zero if all's well, or -1 if we ran into an error we
976 couldn't deal with. */
977 int
978 emacs_get_tty (fd, settings)
979 int fd;
980 struct emacs_tty *settings;
981 {
982 /* Retrieve the primary parameters - baud rate, character size, etcetera. */
983 #ifdef HAVE_TCATTR
984 /* We have those nifty POSIX tcmumbleattr functions. */
985 if (tcgetattr (fd, &settings->main) < 0)
986 return -1;
987
988 #else
989 #ifdef HAVE_TERMIO
990 /* The SYSV-style interface? */
991 if (ioctl (fd, TCGETA, &settings->main) < 0)
992 return -1;
993
994 #else
995 #ifdef VMS
996 /* Vehemently Monstrous System? :-) */
997 if (! (SYS$QIOW (0, fd, IO$_SENSEMODE, settings, 0, 0,
998 &settings->main.class, 12, 0, 0, 0, 0)
999 & 1))
1000 return -1;
1001
1002 #else
1003 #ifndef DOS_NT
1004 /* I give up - I hope you have the BSD ioctls. */
1005 if (ioctl (fd, TIOCGETP, &settings->main) < 0)
1006 return -1;
1007 #endif /* not DOS_NT */
1008 #endif
1009 #endif
1010 #endif
1011
1012 /* Suivant - Do we have to get struct ltchars data? */
1013 #ifdef HAVE_LTCHARS
1014 if (ioctl (fd, TIOCGLTC, &settings->ltchars) < 0)
1015 return -1;
1016 #endif
1017
1018 /* How about a struct tchars and a wordful of lmode bits? */
1019 #ifdef HAVE_TCHARS
1020 if (ioctl (fd, TIOCGETC, &settings->tchars) < 0
1021 || ioctl (fd, TIOCLGET, &settings->lmode) < 0)
1022 return -1;
1023 #endif
1024
1025 /* We have survived the tempest. */
1026 return 0;
1027 }
1028
1029
1030 /* Set the parameters of the tty on FD according to the contents of
1031 *SETTINGS. If WAITP is non-zero, we wait for all queued output to
1032 be written before making the change; otherwise, we forget any
1033 queued input and make the change immediately.
1034 Return 0 if all went well, and -1 if anything failed. */
1035 int
1036 emacs_set_tty (fd, settings, waitp)
1037 int fd;
1038 struct emacs_tty *settings;
1039 int waitp;
1040 {
1041 /* Set the primary parameters - baud rate, character size, etcetera. */
1042 #ifdef HAVE_TCATTR
1043 int i;
1044 /* We have those nifty POSIX tcmumbleattr functions.
1045 William J. Smith <wjs@wiis.wang.com> writes:
1046 "POSIX 1003.1 defines tcsetattr() to return success if it was
1047 able to perform any of the requested actions, even if some
1048 of the requested actions could not be performed.
1049 We must read settings back to ensure tty setup properly.
1050 AIX requires this to keep tty from hanging occasionally." */
1051 /* This make sure that we don't loop indefinitely in here. */
1052 for (i = 0 ; i < 10 ; i++)
1053 if (tcsetattr (fd, waitp ? TCSAFLUSH : TCSADRAIN, &settings->main) < 0)
1054 {
1055 if (errno == EINTR)
1056 continue;
1057 else
1058 return -1;
1059 }
1060 else
1061 {
1062 struct termios new;
1063
1064 /* Get the current settings, and see if they're what we asked for. */
1065 tcgetattr (fd, &new);
1066 /* We cannot use memcmp on the whole structure here because under
1067 * aix386 the termios structure has some reserved field that may
1068 * not be filled in.
1069 */
1070 if ( new.c_iflag == settings->main.c_iflag
1071 && new.c_oflag == settings->main.c_oflag
1072 && new.c_cflag == settings->main.c_cflag
1073 && new.c_lflag == settings->main.c_lflag
1074 && memcmp(new.c_cc, settings->main.c_cc, NCCS) == 0)
1075 break;
1076 else
1077 continue;
1078 }
1079
1080 #else
1081 #ifdef HAVE_TERMIO
1082 /* The SYSV-style interface? */
1083 if (ioctl (fd, waitp ? TCSETAW : TCSETAF, &settings->main) < 0)
1084 return -1;
1085
1086 #else
1087 #ifdef VMS
1088 /* Vehemently Monstrous System? :-) */
1089 if (! (SYS$QIOW (0, fd, IO$_SETMODE, &input_iosb, 0, 0,
1090 &settings->main.class, 12, 0, 0, 0, 0)
1091 & 1))
1092 return -1;
1093
1094 #else
1095 #ifndef DOS_NT
1096 /* I give up - I hope you have the BSD ioctls. */
1097 if (ioctl (fd, (waitp) ? TIOCSETP : TIOCSETN, &settings->main) < 0)
1098 return -1;
1099 #endif /* not DOS_NT */
1100
1101 #endif
1102 #endif
1103 #endif
1104
1105 /* Suivant - Do we have to get struct ltchars data? */
1106 #ifdef HAVE_LTCHARS
1107 if (ioctl (fd, TIOCSLTC, &settings->ltchars) < 0)
1108 return -1;
1109 #endif
1110
1111 /* How about a struct tchars and a wordful of lmode bits? */
1112 #ifdef HAVE_TCHARS
1113 if (ioctl (fd, TIOCSETC, &settings->tchars) < 0
1114 || ioctl (fd, TIOCLSET, &settings->lmode) < 0)
1115 return -1;
1116 #endif
1117
1118 /* We have survived the tempest. */
1119 return 0;
1120 }
1121
1122 \f
1123 /* The initial tty mode bits */
1124 struct emacs_tty old_tty;
1125
1126 int term_initted; /* 1 if outer tty status has been recorded */
1127
1128 #ifdef BSD4_1
1129 /* BSD 4.1 needs to keep track of the lmode bits in order to start
1130 sigio. */
1131 int lmode;
1132 #endif
1133
1134 #ifndef F_SETOWN_BUG
1135 #ifdef F_SETOWN
1136 int old_fcntl_owner;
1137 #endif /* F_SETOWN */
1138 #endif /* F_SETOWN_BUG */
1139
1140 /* This may also be defined in stdio,
1141 but if so, this does no harm,
1142 and using the same name avoids wasting the other one's space. */
1143
1144 #if defined (USG) || defined (DGUX)
1145 unsigned char _sobuf[BUFSIZ+8];
1146 #else
1147 char _sobuf[BUFSIZ];
1148 #endif
1149
1150 #ifdef HAVE_LTCHARS
1151 static struct ltchars new_ltchars = {-1,-1,-1,-1,-1,-1};
1152 #endif
1153 #ifdef HAVE_TCHARS
1154 static struct tchars new_tchars = {-1,-1,-1,-1,-1,-1};
1155 #endif
1156
1157 init_sys_modes ()
1158 {
1159 struct emacs_tty tty;
1160
1161 #ifdef VMS
1162 #if 0
1163 static int oob_chars[2] = {0, 1 << 7}; /* catch C-g's */
1164 extern int (*interrupt_signal) ();
1165 #endif
1166 #endif
1167
1168 if (noninteractive)
1169 return;
1170
1171 #ifdef VMS
1172 if (!input_ef)
1173 input_ef = get_kbd_event_flag ();
1174 /* LIB$GET_EF (&input_ef); */
1175 SYS$CLREF (input_ef);
1176 waiting_for_ast = 0;
1177 if (!timer_ef)
1178 timer_ef = get_timer_event_flag ();
1179 /* LIB$GET_EF (&timer_ef); */
1180 SYS$CLREF (timer_ef);
1181 #if 0
1182 if (!process_ef)
1183 {
1184 LIB$GET_EF (&process_ef);
1185 SYS$CLREF (process_ef);
1186 }
1187 if (input_ef / 32 != process_ef / 32)
1188 croak ("Input and process event flags in different clusters.");
1189 #endif
1190 if (input_ef / 32 != timer_ef / 32)
1191 croak ("Input and timer event flags in different clusters.");
1192 #if 0
1193 input_eflist = ((unsigned) 1 << (input_ef % 32)) |
1194 ((unsigned) 1 << (process_ef % 32));
1195 #endif
1196 timer_eflist = ((unsigned) 1 << (input_ef % 32)) |
1197 ((unsigned) 1 << (timer_ef % 32));
1198 #ifndef VMS4_4
1199 sys_access_reinit ();
1200 #endif
1201 #endif /* not VMS */
1202
1203 #ifdef BSD_PGRPS
1204 if (! read_socket_hook && EQ (Vwindow_system, Qnil))
1205 narrow_foreground_group ();
1206 #endif
1207
1208 #ifdef HAVE_X_WINDOWS
1209 /* Emacs' window system on MSDOG uses the `internal terminal' and therefore
1210 needs the initialization code below. */
1211 if (!read_socket_hook && EQ (Vwindow_system, Qnil))
1212 #endif
1213 {
1214 EMACS_GET_TTY (input_fd, &old_tty);
1215
1216 tty = old_tty;
1217
1218 #if defined (HAVE_TERMIO) || defined (HAVE_TERMIOS)
1219 #ifdef DGUX
1220 /* This allows meta to be sent on 8th bit. */
1221 tty.main.c_iflag &= ~INPCK; /* don't check input for parity */
1222 #endif
1223 tty.main.c_iflag |= (IGNBRK); /* Ignore break condition */
1224 tty.main.c_iflag &= ~ICRNL; /* Disable map of CR to NL on input */
1225 #ifdef ISTRIP
1226 tty.main.c_iflag &= ~ISTRIP; /* don't strip 8th bit on input */
1227 #endif
1228 tty.main.c_lflag &= ~ECHO; /* Disable echo */
1229 tty.main.c_lflag &= ~ICANON; /* Disable erase/kill processing */
1230 #ifdef IEXTEN
1231 tty.main.c_lflag &= ~IEXTEN; /* Disable other editing characters. */
1232 #endif
1233 tty.main.c_lflag |= ISIG; /* Enable signals */
1234 if (flow_control)
1235 {
1236 tty.main.c_iflag |= IXON; /* Enable start/stop output control */
1237 #ifdef IXANY
1238 tty.main.c_iflag &= ~IXANY;
1239 #endif /* IXANY */
1240 }
1241 else
1242 tty.main.c_iflag &= ~IXON; /* Disable start/stop output control */
1243 tty.main.c_oflag &= ~ONLCR; /* Disable map of NL to CR-NL
1244 on output */
1245 tty.main.c_oflag &= ~TAB3; /* Disable tab expansion */
1246 #ifdef CS8
1247 if (meta_key)
1248 {
1249 tty.main.c_cflag |= CS8; /* allow 8th bit on input */
1250 tty.main.c_cflag &= ~PARENB;/* Don't check parity */
1251 }
1252 #endif
1253 tty.main.c_cc[VINTR] = quit_char; /* C-g (usually) gives SIGINT */
1254 /* Set up C-g for both SIGQUIT and SIGINT.
1255 We don't know which we will get, but we handle both alike
1256 so which one it really gives us does not matter. */
1257 tty.main.c_cc[VQUIT] = quit_char;
1258 tty.main.c_cc[VMIN] = 1; /* Input should wait for at least 1 char */
1259 tty.main.c_cc[VTIME] = 0; /* no matter how long that takes. */
1260 #ifdef VSWTCH
1261 tty.main.c_cc[VSWTCH] = CDISABLE; /* Turn off shell layering use
1262 of C-z */
1263 #endif /* VSWTCH */
1264 #if defined (mips) || defined (HAVE_TCATTR)
1265 #ifdef VSUSP
1266 tty.main.c_cc[VSUSP] = CDISABLE; /* Turn off mips handling of C-z. */
1267 #endif /* VSUSP */
1268 #ifdef V_DSUSP
1269 tty.main.c_cc[V_DSUSP] = CDISABLE; /* Turn off mips handling of C-y. */
1270 #endif /* V_DSUSP */
1271 #ifdef VDSUSP /* Some systems have VDSUSP, some have V_DSUSP. */
1272 tty.main.c_cc[VDSUSP] = CDISABLE;
1273 #endif /* VDSUSP */
1274 #ifdef VLNEXT
1275 tty.main.c_cc[VLNEXT] = CDISABLE;
1276 #endif /* VLNEXT */
1277 #ifdef VREPRINT
1278 tty.main.c_cc[VREPRINT] = CDISABLE;
1279 #endif /* VREPRINT */
1280 #ifdef VWERASE
1281 tty.main.c_cc[VWERASE] = CDISABLE;
1282 #endif /* VWERASE */
1283 #ifdef VDISCARD
1284 tty.main.c_cc[VDISCARD] = CDISABLE;
1285 #endif /* VDISCARD */
1286 #ifdef VSTART
1287 tty.main.c_cc[VSTART] = CDISABLE;
1288 #endif /* VSTART */
1289 #ifdef VSTOP
1290 tty.main.c_cc[VSTOP] = CDISABLE;
1291 #endif /* VSTOP */
1292 #endif /* mips or HAVE_TCATTR */
1293 #ifdef SET_LINE_DISCIPLINE
1294 /* Need to explicitely request TERMIODISC line discipline or
1295 Ultrix's termios does not work correctly. */
1296 tty.main.c_line = SET_LINE_DISCIPLINE;
1297 #endif
1298 #ifdef AIX
1299 #ifndef IBMR2AIX
1300 /* AIX enhanced edit loses NULs, so disable it. */
1301 tty.main.c_line = 0;
1302 tty.main.c_iflag &= ~ASCEDIT;
1303 #else
1304 tty.main.c_cc[VSTRT] = 255;
1305 tty.main.c_cc[VSTOP] = 255;
1306 tty.main.c_cc[VSUSP] = 255;
1307 tty.main.c_cc[VDSUSP] = 255;
1308 #endif /* IBMR2AIX */
1309 /* Also, PTY overloads NUL and BREAK.
1310 don't ignore break, but don't signal either, so it looks like NUL.
1311 This really serves a purpose only if running in an XTERM window
1312 or via TELNET or the like, but does no harm elsewhere. */
1313 tty.main.c_iflag &= ~IGNBRK;
1314 tty.main.c_iflag &= ~BRKINT;
1315 #endif
1316 #else /* if not HAVE_TERMIO */
1317 #ifdef VMS
1318 tty.main.tt_char |= TT$M_NOECHO;
1319 if (meta_key)
1320 tty.main.tt_char |= TT$M_EIGHTBIT;
1321 if (flow_control)
1322 tty.main.tt_char |= TT$M_TTSYNC;
1323 else
1324 tty.main.tt_char &= ~TT$M_TTSYNC;
1325 tty.main.tt2_char |= TT2$M_PASTHRU | TT2$M_XON;
1326 #else /* not VMS (BSD, that is) */
1327 #ifndef DOS_NT
1328 tty.main.sg_flags &= ~(ECHO | CRMOD | XTABS);
1329 if (meta_key)
1330 tty.main.sg_flags |= ANYP;
1331 tty.main.sg_flags |= interrupt_input ? RAW : CBREAK;
1332 #endif /* not DOS_NT */
1333 #endif /* not VMS (BSD, that is) */
1334 #endif /* not HAVE_TERMIO */
1335
1336 /* If going to use CBREAK mode, we must request C-g to interrupt
1337 and turn off start and stop chars, etc. If not going to use
1338 CBREAK mode, do this anyway so as to turn off local flow
1339 control for user coming over network on 4.2; in this case,
1340 only t_stopc and t_startc really matter. */
1341 #ifndef HAVE_TERMIO
1342 #ifdef HAVE_TCHARS
1343 /* Note: if not using CBREAK mode, it makes no difference how we
1344 set this */
1345 tty.tchars = new_tchars;
1346 tty.tchars.t_intrc = quit_char;
1347 if (flow_control)
1348 {
1349 tty.tchars.t_startc = '\021';
1350 tty.tchars.t_stopc = '\023';
1351 }
1352
1353 tty.lmode = LDECCTQ | LLITOUT | LPASS8 | LNOFLSH | old_tty.lmode;
1354 #ifdef ultrix
1355 /* Under Ultrix 4.2a, leaving this out doesn't seem to hurt
1356 anything, and leaving it in breaks the meta key. Go figure. */
1357 tty.lmode &= ~LLITOUT;
1358 #endif
1359
1360 #ifdef BSD4_1
1361 lmode = tty.lmode;
1362 #endif
1363
1364 #endif /* HAVE_TCHARS */
1365 #endif /* not HAVE_TERMIO */
1366
1367 #ifdef HAVE_LTCHARS
1368 tty.ltchars = new_ltchars;
1369 #endif /* HAVE_LTCHARS */
1370 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida, MW Aug 1993 */
1371 if (!term_initted)
1372 internal_terminal_init ();
1373 dos_ttraw ();
1374 #endif
1375
1376 EMACS_SET_TTY (input_fd, &tty, 0);
1377
1378 /* This code added to insure that, if flow-control is not to be used,
1379 we have an unlocked terminal at the start. */
1380
1381 #ifdef TCXONC
1382 if (!flow_control) ioctl (input_fd, TCXONC, 1);
1383 #endif
1384 #ifndef APOLLO
1385 #ifdef TIOCSTART
1386 if (!flow_control) ioctl (input_fd, TIOCSTART, 0);
1387 #endif
1388 #endif
1389
1390 #if defined (HAVE_TERMIOS) || defined (HPUX9)
1391 #ifdef TCOON
1392 if (!flow_control) tcflow (input_fd, TCOON);
1393 #endif
1394 #endif
1395
1396 #ifdef AIXHFT
1397 hft_init ();
1398 #ifdef IBMR2AIX
1399 {
1400 /* IBM's HFT device usually thinks a ^J should be LF/CR. We need it
1401 to be only LF. This is the way that is done. */
1402 struct termio tty;
1403
1404 if (ioctl (1, HFTGETID, &tty) != -1)
1405 write (1, "\033[20l", 5);
1406 }
1407 #endif
1408 #endif /* AIXHFT */
1409
1410 #ifdef VMS
1411 /* Appears to do nothing when in PASTHRU mode.
1412 SYS$QIOW (0, input_fd, IO$_SETMODE|IO$M_OUTBAND, 0, 0, 0,
1413 interrupt_signal, oob_chars, 0, 0, 0, 0);
1414 */
1415 queue_kbd_input (0);
1416 #endif /* VMS */
1417 }
1418
1419 #ifdef F_SETFL
1420 #ifndef F_SETOWN_BUG
1421 #ifdef F_GETOWN /* F_SETFL does not imply existence of F_GETOWN */
1422 if (interrupt_input
1423 && ! read_socket_hook && EQ (Vwindow_system, Qnil))
1424 {
1425 old_fcntl_owner = fcntl (input_fd, F_GETOWN, 0);
1426 fcntl (input_fd, F_SETOWN, getpid ());
1427 init_sigio (input_fd);
1428 }
1429 #endif /* F_GETOWN */
1430 #endif /* F_SETOWN_BUG */
1431 #endif /* F_SETFL */
1432
1433 #ifdef BSD4_1
1434 if (interrupt_input)
1435 init_sigio (input_fd);
1436 #endif
1437
1438 #ifdef VMS /* VMS sometimes has this symbol but lacks setvbuf. */
1439 #undef _IOFBF
1440 #endif
1441 #ifdef _IOFBF
1442 /* This symbol is defined on recent USG systems.
1443 Someone says without this call USG won't really buffer the file
1444 even with a call to setbuf. */
1445 setvbuf (stdout, _sobuf, _IOFBF, sizeof _sobuf);
1446 #else
1447 setbuf (stdout, _sobuf);
1448 #endif
1449 if (! read_socket_hook && EQ (Vwindow_system, Qnil))
1450 set_terminal_modes ();
1451
1452 if (term_initted && no_redraw_on_reenter)
1453 {
1454 if (display_completed)
1455 direct_output_forward_char (0);
1456 }
1457 else
1458 {
1459 frame_garbaged = 1;
1460 #ifdef MULTI_FRAME
1461 if (FRAMEP (Vterminal_frame))
1462 FRAME_GARBAGED_P (XFRAME (Vterminal_frame)) = 1;
1463 #endif
1464 }
1465
1466 term_initted = 1;
1467 }
1468
1469 /* Return nonzero if safe to use tabs in output.
1470 At the time this is called, init_sys_modes has not been done yet. */
1471
1472 tabs_safe_p ()
1473 {
1474 struct emacs_tty tty;
1475
1476 EMACS_GET_TTY (input_fd, &tty);
1477 return EMACS_TTY_TABS_OK (&tty);
1478 }
1479 \f
1480 /* Get terminal size from system.
1481 Store number of lines into *HEIGHTP and width into *WIDTHP.
1482 We store 0 if there's no valid information. */
1483
1484 get_frame_size (widthp, heightp)
1485 int *widthp, *heightp;
1486 {
1487
1488 #ifdef TIOCGWINSZ
1489
1490 /* BSD-style. */
1491 struct winsize size;
1492
1493 if (ioctl (input_fd, TIOCGWINSZ, &size) == -1)
1494 *widthp = *heightp = 0;
1495 else
1496 {
1497 *widthp = size.ws_col;
1498 *heightp = size.ws_row;
1499 }
1500
1501 #else
1502 #ifdef TIOCGSIZE
1503
1504 /* SunOS - style. */
1505 struct ttysize size;
1506
1507 if (ioctl (input_fd, TIOCGSIZE, &size) == -1)
1508 *widthp = *heightp = 0;
1509 else
1510 {
1511 *widthp = size.ts_cols;
1512 *heightp = size.ts_lines;
1513 }
1514
1515 #else
1516 #ifdef VMS
1517
1518 struct sensemode tty;
1519
1520 SYS$QIOW (0, input_fd, IO$_SENSEMODE, &tty, 0, 0,
1521 &tty.class, 12, 0, 0, 0, 0);
1522 *widthp = tty.scr_wid;
1523 *heightp = tty.scr_len;
1524
1525 #else
1526 #ifdef MSDOS
1527 *widthp = ScreenCols ();
1528 *heightp = ScreenRows ();
1529 #else /* system doesn't know size */
1530 *widthp = 0;
1531 *heightp = 0;
1532 #endif
1533
1534 #endif /* not VMS */
1535 #endif /* not SunOS-style */
1536 #endif /* not BSD-style */
1537 }
1538
1539 /* Set the logical window size associated with descriptor FD
1540 to HEIGHT and WIDTH. This is used mainly with ptys. */
1541
1542 int
1543 set_window_size (fd, height, width)
1544 int fd, height, width;
1545 {
1546 #ifdef TIOCSWINSZ
1547
1548 /* BSD-style. */
1549 struct winsize size;
1550 size.ws_row = height;
1551 size.ws_col = width;
1552
1553 if (ioctl (fd, TIOCSWINSZ, &size) == -1)
1554 return 0; /* error */
1555 else
1556 return 1;
1557
1558 #else
1559 #ifdef TIOCSSIZE
1560
1561 /* SunOS - style. */
1562 struct ttysize size;
1563 size.ts_lines = height;
1564 size.ts_cols = width;
1565
1566 if (ioctl (fd, TIOCGSIZE, &size) == -1)
1567 return 0;
1568 else
1569 return 1;
1570 #else
1571 return -1;
1572 #endif /* not SunOS-style */
1573 #endif /* not BSD-style */
1574 }
1575
1576 \f
1577 /* Prepare the terminal for exiting Emacs; move the cursor to the
1578 bottom of the frame, turn off interrupt-driven I/O, etc. */
1579 reset_sys_modes ()
1580 {
1581 if (noninteractive)
1582 {
1583 fflush (stdout);
1584 return;
1585 }
1586 if (!term_initted)
1587 return;
1588 #ifdef HAVE_X_WINDOWS
1589 /* Emacs' window system on MSDOG uses the `internal terminal' and therefore
1590 needs the clean-up code below. */
1591 if (read_socket_hook || !EQ (Vwindow_system, Qnil))
1592 return;
1593 #endif
1594 cursor_to (FRAME_HEIGHT (selected_frame) - 1, 0);
1595 #ifdef MSDOS
1596 if (!EQ (Vwindow_system, Qnil))
1597 {
1598 /* Change to grey on white. */
1599 putchar ('\e');
1600 putchar ('A');
1601 putchar (7);
1602 }
1603 #endif
1604 clear_end_of_line (FRAME_WIDTH (selected_frame));
1605 /* clear_end_of_line may move the cursor */
1606 cursor_to (FRAME_HEIGHT (selected_frame) - 1, 0);
1607 #if defined (IBMR2AIX) && defined (AIXHFT)
1608 {
1609 /* HFT devices normally use ^J as a LF/CR. We forced it to
1610 do the LF only. Now, we need to reset it. */
1611 struct termio tty;
1612
1613 if (ioctl (1, HFTGETID, &tty) != -1)
1614 write (1, "\033[20h", 5);
1615 }
1616 #endif
1617
1618 reset_terminal_modes ();
1619 fflush (stdout);
1620 #ifdef BSD
1621 #ifndef BSD4_1
1622 /* Avoid possible loss of output when changing terminal modes. */
1623 fsync (fileno (stdout));
1624 #endif
1625 #endif
1626
1627 #ifdef F_SETFL
1628 #ifndef F_SETOWN_BUG
1629 #ifdef F_SETOWN /* F_SETFL does not imply existence of F_SETOWN */
1630 if (interrupt_input)
1631 {
1632 reset_sigio ();
1633 fcntl (input_fd, F_SETOWN, old_fcntl_owner);
1634 }
1635 #endif /* F_SETOWN */
1636 #endif /* F_SETOWN_BUG */
1637 #ifdef O_NDELAY
1638 fcntl (input_fd, F_SETFL, fcntl (input_fd, F_GETFL, 0) & ~O_NDELAY);
1639 #endif
1640 #endif /* F_SETFL */
1641 #ifdef BSD4_1
1642 if (interrupt_input)
1643 reset_sigio ();
1644 #endif /* BSD4_1 */
1645
1646 while (EMACS_SET_TTY (input_fd, &old_tty, 0) < 0 && errno == EINTR)
1647 ;
1648
1649 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */
1650 dos_ttcooked ();
1651 #endif
1652
1653 #ifdef SET_LINE_DISCIPLINE
1654 /* Ultrix's termios *ignores* any line discipline except TERMIODISC.
1655 A different old line discipline is therefore not restored, yet.
1656 Restore the old line discipline by hand. */
1657 ioctl (0, TIOCSETD, &old_tty.main.c_line);
1658 #endif
1659
1660 #ifdef AIXHFT
1661 hft_reset ();
1662 #endif
1663
1664 #ifdef BSD_PGRPS
1665 widen_foreground_group ();
1666 #endif
1667 }
1668 \f
1669 #ifdef HAVE_PTYS
1670
1671 /* Set up the proper status flags for use of a pty. */
1672
1673 setup_pty (fd)
1674 int fd;
1675 {
1676 /* I'm told that TOICREMOTE does not mean control chars
1677 "can't be sent" but rather that they don't have
1678 input-editing or signaling effects.
1679 That should be good, because we have other ways
1680 to do those things in Emacs.
1681 However, telnet mode seems not to work on 4.2.
1682 So TIOCREMOTE is turned off now. */
1683
1684 /* Under hp-ux, if TIOCREMOTE is turned on, some calls
1685 will hang. In particular, the "timeout" feature (which
1686 causes a read to return if there is no data available)
1687 does this. Also it is known that telnet mode will hang
1688 in such a way that Emacs must be stopped (perhaps this
1689 is the same problem).
1690
1691 If TIOCREMOTE is turned off, then there is a bug in
1692 hp-ux which sometimes loses data. Apparently the
1693 code which blocks the master process when the internal
1694 buffer fills up does not work. Other than this,
1695 though, everything else seems to work fine.
1696
1697 Since the latter lossage is more benign, we may as well
1698 lose that way. -- cph */
1699 #ifdef FIONBIO
1700 #ifdef SYSV_PTYS
1701 {
1702 int on = 1;
1703 ioctl (fd, FIONBIO, &on);
1704 }
1705 #endif
1706 #endif
1707 #ifdef IBMRTAIX
1708 /* On AIX, the parent gets SIGHUP when a pty attached child dies. So, we */
1709 /* ignore SIGHUP once we've started a child on a pty. Note that this may */
1710 /* cause EMACS not to die when it should, i.e., when its own controlling */
1711 /* tty goes away. I've complained to the AIX developers, and they may */
1712 /* change this behavior, but I'm not going to hold my breath. */
1713 signal (SIGHUP, SIG_IGN);
1714 #endif
1715 }
1716 #endif /* HAVE_PTYS */
1717 \f
1718 #ifdef VMS
1719
1720 /* Assigning an input channel is done at the start of Emacs execution.
1721 This is called each time Emacs is resumed, also, but does nothing
1722 because input_chain is no longer zero. */
1723
1724 init_vms_input ()
1725 {
1726 int status;
1727
1728 if (input_fd == 0)
1729 {
1730 status = SYS$ASSIGN (&input_dsc, &input_fd, 0, 0);
1731 if (! (status & 1))
1732 LIB$STOP (status);
1733 }
1734 }
1735
1736 /* Deassigning the input channel is done before exiting. */
1737
1738 stop_vms_input ()
1739 {
1740 return SYS$DASSGN (input_fd);
1741 }
1742
1743 short input_buffer;
1744
1745 /* Request reading one character into the keyboard buffer.
1746 This is done as soon as the buffer becomes empty. */
1747
1748 queue_kbd_input ()
1749 {
1750 int status;
1751 extern kbd_input_ast ();
1752
1753 waiting_for_ast = 0;
1754 stop_input = 0;
1755 status = SYS$QIO (0, input_fd, IO$_READVBLK,
1756 &input_iosb, kbd_input_ast, 1,
1757 &input_buffer, 1, 0, terminator_mask, 0, 0);
1758 }
1759
1760 int input_count;
1761
1762 /* Ast routine that is called when keyboard input comes in
1763 in accord with the SYS$QIO above. */
1764
1765 kbd_input_ast ()
1766 {
1767 register int c = -1;
1768 int old_errno = errno;
1769 extern EMACS_TIME *input_available_clear_time;
1770
1771 if (waiting_for_ast)
1772 SYS$SETEF (input_ef);
1773 waiting_for_ast = 0;
1774 input_count++;
1775 #ifdef ASTDEBUG
1776 if (input_count == 25)
1777 exit (1);
1778 printf ("Ast # %d,", input_count);
1779 printf (" iosb = %x, %x, %x, %x",
1780 input_iosb.offset, input_iosb.status, input_iosb.termlen,
1781 input_iosb.term);
1782 #endif
1783 if (input_iosb.offset)
1784 {
1785 c = input_buffer;
1786 #ifdef ASTDEBUG
1787 printf (", char = 0%o", c);
1788 #endif
1789 }
1790 #ifdef ASTDEBUG
1791 printf ("\n");
1792 fflush (stdout);
1793 sleep (1);
1794 #endif
1795 if (! stop_input)
1796 queue_kbd_input ();
1797 if (c >= 0)
1798 {
1799 struct input_event e;
1800 e.kind = ascii_keystroke;
1801 XSETINT (e.code, c);
1802 XSETFRAME (e.frame_or_window, selected_frame);
1803 kbd_buffer_store_event (&e);
1804 }
1805 if (input_available_clear_time)
1806 EMACS_SET_SECS_USECS (*input_available_clear_time, 0, 0);
1807 errno = old_errno;
1808 }
1809
1810 /* Wait until there is something in kbd_buffer. */
1811
1812 wait_for_kbd_input ()
1813 {
1814 extern int have_process_input, process_exited;
1815
1816 /* If already something, avoid doing system calls. */
1817 if (detect_input_pending ())
1818 {
1819 return;
1820 }
1821 /* Clear a flag, and tell ast routine above to set it. */
1822 SYS$CLREF (input_ef);
1823 waiting_for_ast = 1;
1824 /* Check for timing error: ast happened while we were doing that. */
1825 if (!detect_input_pending ())
1826 {
1827 /* No timing error: wait for flag to be set. */
1828 set_waiting_for_input (0);
1829 SYS$WFLOR (input_ef, input_eflist);
1830 clear_waiting_for_input (0);
1831 if (!detect_input_pending ())
1832 /* Check for subprocess input availability */
1833 {
1834 int dsp = have_process_input || process_exited;
1835
1836 SYS$CLREF (process_ef);
1837 if (have_process_input)
1838 process_command_input ();
1839 if (process_exited)
1840 process_exit ();
1841 if (dsp)
1842 {
1843 update_mode_lines++;
1844 prepare_menu_bars ();
1845 redisplay_preserve_echo_area ();
1846 }
1847 }
1848 }
1849 waiting_for_ast = 0;
1850 }
1851
1852 /* Get rid of any pending QIO, when we are about to suspend
1853 or when we want to throw away pending input.
1854 We wait for a positive sign that the AST routine has run
1855 and therefore there is no I/O request queued when we return.
1856 SYS$SETAST is used to avoid a timing error. */
1857
1858 end_kbd_input ()
1859 {
1860 #ifdef ASTDEBUG
1861 printf ("At end_kbd_input.\n");
1862 fflush (stdout);
1863 sleep (1);
1864 #endif
1865 if (LIB$AST_IN_PROG ()) /* Don't wait if suspending from kbd_buffer_store_event! */
1866 {
1867 SYS$CANCEL (input_fd);
1868 return;
1869 }
1870
1871 SYS$SETAST (0);
1872 /* Clear a flag, and tell ast routine above to set it. */
1873 SYS$CLREF (input_ef);
1874 waiting_for_ast = 1;
1875 stop_input = 1;
1876 SYS$CANCEL (input_fd);
1877 SYS$SETAST (1);
1878 SYS$WAITFR (input_ef);
1879 waiting_for_ast = 0;
1880 }
1881
1882 /* Wait for either input available or time interval expiry. */
1883
1884 input_wait_timeout (timeval)
1885 int timeval; /* Time to wait, in seconds */
1886 {
1887 int time [2];
1888 static int zero = 0;
1889 static int large = -10000000;
1890
1891 LIB$EMUL (&timeval, &large, &zero, time); /* Convert to VMS format */
1892
1893 /* If already something, avoid doing system calls. */
1894 if (detect_input_pending ())
1895 {
1896 return;
1897 }
1898 /* Clear a flag, and tell ast routine above to set it. */
1899 SYS$CLREF (input_ef);
1900 waiting_for_ast = 1;
1901 /* Check for timing error: ast happened while we were doing that. */
1902 if (!detect_input_pending ())
1903 {
1904 /* No timing error: wait for flag to be set. */
1905 SYS$CANTIM (1, 0);
1906 if (SYS$SETIMR (timer_ef, time, 0, 1) & 1) /* Set timer */
1907 SYS$WFLOR (timer_ef, timer_eflist); /* Wait for timer expiry or input */
1908 }
1909 waiting_for_ast = 0;
1910 }
1911
1912 /* The standard `sleep' routine works some other way
1913 and it stops working if you have ever quit out of it.
1914 This one continues to work. */
1915
1916 sys_sleep (timeval)
1917 int timeval;
1918 {
1919 int time [2];
1920 static int zero = 0;
1921 static int large = -10000000;
1922
1923 LIB$EMUL (&timeval, &large, &zero, time); /* Convert to VMS format */
1924
1925 SYS$CANTIM (1, 0);
1926 if (SYS$SETIMR (timer_ef, time, 0, 1) & 1) /* Set timer */
1927 SYS$WAITFR (timer_ef); /* Wait for timer expiry only */
1928 }
1929
1930 init_sigio (fd)
1931 int fd;
1932 {
1933 request_sigio ();
1934 }
1935
1936 reset_sigio ()
1937 {
1938 unrequest_sigio ();
1939 }
1940
1941 request_sigio ()
1942 {
1943 croak ("request sigio");
1944 }
1945
1946 unrequest_sigio ()
1947 {
1948 croak ("unrequest sigio");
1949 }
1950
1951 #endif /* VMS */
1952 \f
1953 /* Note that VMS compiler won't accept defined (CANNOT_DUMP). */
1954 #ifndef CANNOT_DUMP
1955 #define NEED_STARTS
1956 #endif
1957
1958 #ifndef SYSTEM_MALLOC
1959 #ifndef NEED_STARTS
1960 #define NEED_STARTS
1961 #endif
1962 #endif
1963
1964 #ifdef NEED_STARTS
1965 /* Some systems that cannot dump also cannot implement these. */
1966
1967 /*
1968 * Return the address of the start of the text segment prior to
1969 * doing an unexec. After unexec the return value is undefined.
1970 * See crt0.c for further explanation and _start.
1971 *
1972 */
1973
1974 #ifndef HAVE_TEXT_START
1975 char *
1976 start_of_text ()
1977 {
1978 #ifdef TEXT_START
1979 return ((char *) TEXT_START);
1980 #else
1981 #ifdef GOULD
1982 extern csrt ();
1983 return ((char *) csrt);
1984 #else /* not GOULD */
1985 extern int _start ();
1986 return ((char *) _start);
1987 #endif /* GOULD */
1988 #endif /* TEXT_START */
1989 }
1990 #endif /* not HAVE_TEXT_START */
1991
1992 /*
1993 * Return the address of the start of the data segment prior to
1994 * doing an unexec. After unexec the return value is undefined.
1995 * See crt0.c for further information and definition of data_start.
1996 *
1997 * Apparently, on BSD systems this is etext at startup. On
1998 * USG systems (swapping) this is highly mmu dependent and
1999 * is also dependent on whether or not the program is running
2000 * with shared text. Generally there is a (possibly large)
2001 * gap between end of text and start of data with shared text.
2002 *
2003 * On Uniplus+ systems with shared text, data starts at a
2004 * fixed address. Each port (from a given oem) is generally
2005 * different, and the specific value of the start of data can
2006 * be obtained via the UniPlus+ specific "uvar" system call,
2007 * however the method outlined in crt0.c seems to be more portable.
2008 *
2009 * Probably what will have to happen when a USG unexec is available,
2010 * at least on UniPlus, is temacs will have to be made unshared so
2011 * that text and data are contiguous. Then once loadup is complete,
2012 * unexec will produce a shared executable where the data can be
2013 * at the normal shared text boundry and the startofdata variable
2014 * will be patched by unexec to the correct value.
2015 *
2016 */
2017
2018 char *
2019 start_of_data ()
2020 {
2021 #ifdef DATA_START
2022 return ((char *) DATA_START);
2023 #else
2024 #ifdef ORDINARY_LINK
2025 /*
2026 * This is a hack. Since we're not linking crt0.c or pre_crt0.c,
2027 * data_start isn't defined. We take the address of environ, which
2028 * is known to live at or near the start of the system crt0.c, and
2029 * we don't sweat the handful of bytes that might lose.
2030 */
2031 extern char **environ;
2032
2033 return((char *) &environ);
2034 #else
2035 extern int data_start;
2036 return ((char *) &data_start);
2037 #endif /* ORDINARY_LINK */
2038 #endif /* DATA_START */
2039 }
2040 #endif /* NEED_STARTS (not CANNOT_DUMP or not SYSTEM_MALLOC) */
2041
2042 #ifndef CANNOT_DUMP
2043 /* Some systems that cannot dump also cannot implement these. */
2044
2045 /*
2046 * Return the address of the end of the text segment prior to
2047 * doing an unexec. After unexec the return value is undefined.
2048 */
2049
2050 char *
2051 end_of_text ()
2052 {
2053 #ifdef TEXT_END
2054 return ((char *) TEXT_END);
2055 #else
2056 extern int etext;
2057 return ((char *) &etext);
2058 #endif
2059 }
2060
2061 /*
2062 * Return the address of the end of the data segment prior to
2063 * doing an unexec. After unexec the return value is undefined.
2064 */
2065
2066 char *
2067 end_of_data ()
2068 {
2069 #ifdef DATA_END
2070 return ((char *) DATA_END);
2071 #else
2072 extern int edata;
2073 return ((char *) &edata);
2074 #endif
2075 }
2076
2077 #endif /* not CANNOT_DUMP */
2078 \f
2079 /* init_system_name sets up the string for the Lisp function
2080 system-name to return. */
2081
2082 #ifdef BSD4_1
2083 #include <whoami.h>
2084 #endif
2085
2086 extern Lisp_Object Vsystem_name;
2087
2088 #ifndef BSD4_1
2089 #ifndef VMS
2090 #ifdef HAVE_SOCKETS
2091 #include <sys/socket.h>
2092 #include <netdb.h>
2093 #endif /* HAVE_SOCKETS */
2094 #endif /* not VMS */
2095 #endif /* not BSD4_1 */
2096
2097 void
2098 init_system_name ()
2099 {
2100 #ifdef BSD4_1
2101 Vsystem_name = build_string (sysname);
2102 #else
2103 #ifdef VMS
2104 char *sp, *end;
2105 if ((sp = egetenv ("SYS$NODE")) == 0)
2106 Vsystem_name = build_string ("vax-vms");
2107 else if ((end = index (sp, ':')) == 0)
2108 Vsystem_name = build_string (sp);
2109 else
2110 Vsystem_name = make_string (sp, end - sp);
2111 #else
2112 #ifndef HAVE_GETHOSTNAME
2113 struct utsname uts;
2114 uname (&uts);
2115 Vsystem_name = build_string (uts.nodename);
2116 #else /* HAVE_GETHOSTNAME */
2117 int hostname_size = 256;
2118 char *hostname = (char *) alloca (hostname_size);
2119
2120 /* Try to get the host name; if the buffer is too short, try
2121 again. Apparently, the only indication gethostname gives of
2122 whether the buffer was large enough is the presence or absence
2123 of a '\0' in the string. Eech. */
2124 for (;;)
2125 {
2126 gethostname (hostname, hostname_size - 1);
2127 hostname[hostname_size - 1] = '\0';
2128
2129 /* Was the buffer large enough for the '\0'? */
2130 if (strlen (hostname) < hostname_size - 1)
2131 break;
2132
2133 hostname_size <<= 1;
2134 hostname = (char *) alloca (hostname_size);
2135 }
2136 #ifdef HAVE_SOCKETS
2137 /* Turn the hostname into the official, fully-qualified hostname.
2138 Don't do this if we're going to dump; this can confuse system
2139 libraries on some machines and make the dumped emacs core dump. */
2140 #ifndef CANNOT_DUMP
2141 if (initialized)
2142 #endif /* not CANNOT_DUMP */
2143 {
2144 struct hostent *hp;
2145 int count;
2146 for (count = 0; count < 10; count++)
2147 {
2148 #ifdef TRY_AGAIN
2149 h_errno = 0;
2150 #endif
2151 hp = gethostbyname (hostname);
2152 #ifdef TRY_AGAIN
2153 if (! (hp == 0 && h_errno == TRY_AGAIN))
2154 #endif
2155 break;
2156 Fsleep_for (make_number (1), Qnil);
2157 }
2158 if (hp)
2159 {
2160 char *fqdn = hp->h_name;
2161 char *p;
2162
2163 if (!index (fqdn, '.'))
2164 {
2165 /* We still don't have a fully qualified domain name.
2166 Try to find one in the list of alternate names */
2167 char **alias = hp->h_aliases;
2168 while (*alias && !index (*alias, '.'))
2169 alias++;
2170 if (*alias)
2171 fqdn = *alias;
2172 }
2173 hostname = fqdn;
2174 #if 0
2175 /* Convert the host name to lower case. */
2176 /* Using ctype.h here would introduce a possible locale
2177 dependence that is probably wrong for hostnames. */
2178 p = hostname;
2179 while (*p)
2180 {
2181 if (*p >= 'A' && *p <= 'Z')
2182 *p += 'a' - 'A';
2183 p++;
2184 }
2185 #endif
2186 }
2187 }
2188 #endif /* HAVE_SOCKETS */
2189 Vsystem_name = build_string (hostname);
2190 #endif /* HAVE_GETHOSTNAME */
2191 #endif /* VMS */
2192 #endif /* BSD4_1 */
2193 {
2194 unsigned char *p;
2195 for (p = XSTRING (Vsystem_name)->data; *p; p++)
2196 if (*p == ' ' || *p == '\t')
2197 *p = '-';
2198 }
2199 }
2200 \f
2201 #ifndef VMS
2202 #if !defined (HAVE_SELECT) || defined (BROKEN_SELECT_NON_X)
2203
2204 #include "sysselect.h"
2205 #undef select
2206
2207 #if defined (HAVE_X_WINDOWS) && !defined (HAVE_SELECT)
2208 /* Cause explanatory error message at compile time,
2209 since the select emulation is not good enough for X. */
2210 int *x = &x_windows_lose_if_no_select_system_call;
2211 #endif
2212
2213 /* Emulate as much as select as is possible under 4.1 and needed by Gnu Emacs
2214 * Only checks read descriptors.
2215 */
2216 /* How long to wait between checking fds in select */
2217 #define SELECT_PAUSE 1
2218 int select_alarmed;
2219
2220 /* For longjmp'ing back to read_input_waiting. */
2221
2222 jmp_buf read_alarm_throw;
2223
2224 /* Nonzero if the alarm signal should throw back to read_input_waiting.
2225 The read_socket_hook function sets this to 1 while it is waiting. */
2226
2227 int read_alarm_should_throw;
2228
2229 SIGTYPE
2230 select_alarm ()
2231 {
2232 select_alarmed = 1;
2233 #ifdef BSD4_1
2234 sigrelse (SIGALRM);
2235 #else /* not BSD4_1 */
2236 signal (SIGALRM, SIG_IGN);
2237 #endif /* not BSD4_1 */
2238 if (read_alarm_should_throw)
2239 longjmp (read_alarm_throw, 1);
2240 }
2241
2242 #ifndef WINDOWSNT
2243 /* Only rfds are checked. */
2244 int
2245 sys_select (nfds, rfds, wfds, efds, timeout)
2246 int nfds;
2247 SELECT_TYPE *rfds, *wfds, *efds;
2248 EMACS_TIME *timeout;
2249 {
2250 int ravail = 0, old_alarm;
2251 SELECT_TYPE orfds;
2252 int timeoutval;
2253 int *local_timeout;
2254 extern int proc_buffered_char[];
2255 #ifndef subprocesses
2256 int process_tick = 0, update_tick = 0;
2257 #else
2258 extern int process_tick, update_tick;
2259 #endif
2260 SIGTYPE (*old_trap) ();
2261 unsigned char buf;
2262
2263 #if defined (HAVE_SELECT) && defined (HAVE_X_WINDOWS)
2264 /* If we're using X, then the native select will work; we only need the
2265 emulation for non-X usage. */
2266 if (!NILP (Vwindow_system))
2267 return select (nfds, rfds, wfds, efds, timeout);
2268 #endif
2269 timeoutval = timeout ? EMACS_SECS (*timeout) : 100000;
2270 local_timeout = &timeoutval;
2271 FD_ZERO (&orfds);
2272 if (rfds)
2273 {
2274 orfds = *rfds;
2275 FD_ZERO (rfds);
2276 }
2277 if (wfds)
2278 FD_ZERO (wfds);
2279 if (efds)
2280 FD_ZERO (efds);
2281
2282 /* If we are looking only for the terminal, with no timeout,
2283 just read it and wait -- that's more efficient. */
2284 if (*local_timeout == 100000 && process_tick == update_tick
2285 && FD_ISSET (0, &orfds))
2286 {
2287 int fd;
2288 for (fd = 1; fd < nfds; ++fd)
2289 if (FD_ISSET (fd, &orfds))
2290 goto hardway;
2291 if (! detect_input_pending ())
2292 read_input_waiting ();
2293 FD_SET (0, rfds);
2294 return 1;
2295 }
2296
2297 hardway:
2298 /* Once a second, till the timer expires, check all the flagged read
2299 * descriptors to see if any input is available. If there is some then
2300 * set the corresponding bit in the return copy of rfds.
2301 */
2302 while (1)
2303 {
2304 register int to_check, fd;
2305
2306 if (rfds)
2307 {
2308 for (to_check = nfds, fd = 0; --to_check >= 0; fd++)
2309 {
2310 if (FD_ISSET (fd, &orfds))
2311 {
2312 int avail = 0, status = 0;
2313
2314 if (fd == 0)
2315 avail = detect_input_pending (); /* Special keyboard handler */
2316 else
2317 {
2318 #ifdef FIONREAD
2319 status = ioctl (fd, FIONREAD, &avail);
2320 #else /* no FIONREAD */
2321 #ifdef MSDOS
2322 abort (); /* I don't think we need it. */
2323 #else /* not MSDOS */
2324 /* Hoping it will return -1 if nothing available
2325 or 0 if all 0 chars requested are read. */
2326 if (proc_buffered_char[fd] >= 0)
2327 avail = 1;
2328 else
2329 {
2330 avail = read (fd, &buf, 1);
2331 if (avail > 0)
2332 proc_buffered_char[fd] = buf;
2333 }
2334 #endif /* not MSDOS */
2335 #endif /* no FIONREAD */
2336 }
2337 if (status >= 0 && avail > 0)
2338 {
2339 FD_SET (fd, rfds);
2340 ravail++;
2341 }
2342 }
2343 }
2344 }
2345 if (*local_timeout == 0 || ravail != 0 || process_tick != update_tick)
2346 break;
2347 old_alarm = alarm (0);
2348 old_trap = signal (SIGALRM, select_alarm);
2349 select_alarmed = 0;
2350 alarm (SELECT_PAUSE);
2351 /* Wait for a SIGALRM (or maybe a SIGTINT) */
2352 while (select_alarmed == 0 && *local_timeout != 0
2353 && process_tick == update_tick)
2354 {
2355 #ifdef MSDOS
2356 sleep_or_kbd_hit (SELECT_PAUSE, FD_ISSET (0, &orfds) != 0);
2357 select_alarm ();
2358 #else /* not MSDOS */
2359 /* If we are interested in terminal input,
2360 wait by reading the terminal.
2361 That makes instant wakeup for terminal input at least. */
2362 if (FD_ISSET (0, &orfds))
2363 {
2364 read_input_waiting ();
2365 if (detect_input_pending ())
2366 select_alarmed = 1;
2367 }
2368 else
2369 pause ();
2370 #endif /* not MSDOS */
2371 }
2372 (*local_timeout) -= SELECT_PAUSE;
2373 /* Reset the old alarm if there was one */
2374 alarm (0);
2375 signal (SIGALRM, old_trap);
2376 if (old_alarm != 0)
2377 {
2378 /* Reset or forge an interrupt for the original handler. */
2379 old_alarm -= SELECT_PAUSE;
2380 if (old_alarm <= 0)
2381 kill (getpid (), SIGALRM); /* Fake an alarm with the orig' handler */
2382 else
2383 alarm (old_alarm);
2384 }
2385 if (*local_timeout == 0) /* Stop on timer being cleared */
2386 break;
2387 }
2388 return ravail;
2389 }
2390 #endif /* not WINDOWSNT */
2391
2392 /* Read keyboard input into the standard buffer,
2393 waiting for at least one character. */
2394
2395 /* Make all keyboard buffers much bigger when using X windows. */
2396 #ifdef HAVE_X_WINDOWS
2397 #define BUFFER_SIZE_FACTOR 16
2398 #else
2399 #define BUFFER_SIZE_FACTOR 1
2400 #endif
2401
2402 read_input_waiting ()
2403 {
2404 struct input_event e;
2405 int nread, i;
2406 extern int quit_char;
2407
2408 if (read_socket_hook)
2409 {
2410 struct input_event buf[256];
2411
2412 read_alarm_should_throw = 0;
2413 if (! setjmp (read_alarm_throw))
2414 nread = (*read_socket_hook) (0, buf, 256, 1, 0);
2415 else
2416 nread = -1;
2417
2418 /* Scan the chars for C-g and store them in kbd_buffer. */
2419 for (i = 0; i < nread; i++)
2420 {
2421 kbd_buffer_store_event (&buf[i]);
2422 /* Don't look at input that follows a C-g too closely.
2423 This reduces lossage due to autorepeat on C-g. */
2424 if (buf[i].kind == ascii_keystroke
2425 && buf[i].code == quit_char)
2426 break;
2427 }
2428 }
2429 else
2430 {
2431 char buf[3];
2432 nread = read (fileno (stdin), buf, 1);
2433
2434 /* Scan the chars for C-g and store them in kbd_buffer. */
2435 e.kind = ascii_keystroke;
2436 XSETFRAME (e.frame_or_window, selected_frame);
2437 e.modifiers = 0;
2438 for (i = 0; i < nread; i++)
2439 {
2440 /* Convert chars > 0177 to meta events if desired.
2441 We do this under the same conditions that read_avail_input does. */
2442 if (read_socket_hook == 0)
2443 {
2444 /* If the user says she has a meta key, then believe her. */
2445 if (meta_key == 1 && (buf[i] & 0x80))
2446 e.modifiers = meta_modifier;
2447 if (meta_key != 2)
2448 buf[i] &= ~0x80;
2449 }
2450
2451 XSETINT (e.code, buf[i]);
2452 kbd_buffer_store_event (&e);
2453 /* Don't look at input that follows a C-g too closely.
2454 This reduces lossage due to autorepeat on C-g. */
2455 if (buf[i] == quit_char)
2456 break;
2457 }
2458 }
2459 }
2460
2461 #endif /* not HAVE_SELECT */
2462 #endif /* not VMS */
2463 \f
2464 #ifdef BSD4_1
2465 /*
2466 * Partially emulate 4.2 open call.
2467 * open is defined as this in 4.1.
2468 *
2469 * - added by Michael Bloom @ Citicorp/TTI
2470 *
2471 */
2472
2473 int
2474 sys_open (path, oflag, mode)
2475 char *path;
2476 int oflag, mode;
2477 {
2478 if (oflag & O_CREAT)
2479 return creat (path, mode);
2480 else
2481 return open (path, oflag);
2482 }
2483
2484 init_sigio (fd)
2485 int fd;
2486 {
2487 if (noninteractive)
2488 return;
2489 lmode = LINTRUP | lmode;
2490 ioctl (fd, TIOCLSET, &lmode);
2491 }
2492
2493 reset_sigio ()
2494 {
2495 if (noninteractive)
2496 return;
2497 lmode = ~LINTRUP & lmode;
2498 ioctl (0, TIOCLSET, &lmode);
2499 }
2500
2501 request_sigio ()
2502 {
2503 sigrelse (SIGTINT);
2504
2505 interrupts_deferred = 0;
2506 }
2507
2508 unrequest_sigio ()
2509 {
2510 sighold (SIGTINT);
2511
2512 interrupts_deferred = 1;
2513 }
2514
2515 /* still inside #ifdef BSD4_1 */
2516 #ifdef subprocesses
2517
2518 int sigheld; /* Mask of held signals */
2519
2520 sigholdx (signum)
2521 int signum;
2522 {
2523 sigheld |= sigbit (signum);
2524 sighold (signum);
2525 }
2526
2527 sigisheld (signum)
2528 int signum;
2529 {
2530 sigheld |= sigbit (signum);
2531 }
2532
2533 sigunhold (signum)
2534 int signum;
2535 {
2536 sigheld &= ~sigbit (signum);
2537 sigrelse (signum);
2538 }
2539
2540 sigfree () /* Free all held signals */
2541 {
2542 int i;
2543 for (i = 0; i < NSIG; i++)
2544 if (sigheld & sigbit (i))
2545 sigrelse (i);
2546 sigheld = 0;
2547 }
2548
2549 sigbit (i)
2550 {
2551 return 1 << (i - 1);
2552 }
2553 #endif /* subprocesses */
2554 #endif /* BSD4_1 */
2555 \f
2556 /* POSIX signals support - DJB */
2557 /* Anyone with POSIX signals should have ANSI C declarations */
2558
2559 #ifdef POSIX_SIGNALS
2560
2561 sigset_t old_mask, empty_mask, full_mask, temp_mask;
2562 static struct sigaction new_action, old_action;
2563
2564 init_signals ()
2565 {
2566 sigemptyset (&empty_mask);
2567 sigfillset (&full_mask);
2568 }
2569
2570 signal_handler_t
2571 sys_signal (int signal_number, signal_handler_t action)
2572 {
2573 #ifdef DGUX
2574 /* This gets us restartable system calls for efficiency.
2575 The "else" code will works as well. */
2576 return (berk_signal (signal_number, action));
2577 #else
2578 sigemptyset (&new_action.sa_mask);
2579 new_action.sa_handler = action;
2580 #ifdef SA_RESTART
2581 /* Emacs mostly works better with restartable system services. If this
2582 * flag exists, we probably want to turn it on here.
2583 */
2584 new_action.sa_flags = SA_RESTART;
2585 #else
2586 new_action.sa_flags = 0;
2587 #endif
2588 sigaction (signal_number, &new_action, &old_action);
2589 return (old_action.sa_handler);
2590 #endif /* DGUX */
2591 }
2592
2593 #ifndef __GNUC__
2594 /* If we're compiling with GCC, we don't need this function, since it
2595 can be written as a macro. */
2596 sigset_t
2597 sys_sigmask (int sig)
2598 {
2599 sigset_t mask;
2600 sigemptyset (&mask);
2601 sigaddset (&mask, sig);
2602 return mask;
2603 }
2604 #endif
2605
2606 int
2607 sys_sigpause (sigset_t new_mask)
2608 {
2609 /* pause emulating berk sigpause... */
2610 sigsuspend (&new_mask);
2611 return (EINTR);
2612 }
2613
2614 /* I'd like to have these guys return pointers to the mask storage in here,
2615 but there'd be trouble if the code was saving multiple masks. I'll be
2616 safe and pass the structure. It normally won't be more than 2 bytes
2617 anyhow. - DJB */
2618
2619 sigset_t
2620 sys_sigblock (sigset_t new_mask)
2621 {
2622 sigset_t old_mask;
2623 sigprocmask (SIG_BLOCK, &new_mask, &old_mask);
2624 return (old_mask);
2625 }
2626
2627 sigset_t
2628 sys_sigunblock (sigset_t new_mask)
2629 {
2630 sigset_t old_mask;
2631 sigprocmask (SIG_UNBLOCK, &new_mask, &old_mask);
2632 return (old_mask);
2633 }
2634
2635 sigset_t
2636 sys_sigsetmask (sigset_t new_mask)
2637 {
2638 sigset_t old_mask;
2639 sigprocmask (SIG_SETMASK, &new_mask, &old_mask);
2640 return (old_mask);
2641 }
2642
2643 #endif /* POSIX_SIGNALS */
2644 \f
2645 #ifndef HAVE_RANDOM
2646 #ifdef random
2647 #define HAVE_RANDOM
2648 #endif
2649 #endif
2650
2651 /* Figure out how many bits the system's random number generator uses.
2652 `random' and `lrand48' are assumed to return 31 usable bits.
2653 BSD `rand' returns a 31 bit value but the low order bits are unusable;
2654 so we'll shift it and treat it like the 15-bit USG `rand'. */
2655
2656 #ifndef RAND_BITS
2657 # ifdef HAVE_RANDOM
2658 # define RAND_BITS 31
2659 # else /* !HAVE_RANDOM */
2660 # ifdef HAVE_LRAND48
2661 # define RAND_BITS 31
2662 # define random lrand48
2663 # else /* !HAVE_LRAND48 */
2664 # define RAND_BITS 15
2665 # if RAND_MAX == 32767
2666 # define random rand
2667 # else /* RAND_MAX != 32767 */
2668 # if RAND_MAX == 2147483647
2669 # define random() (rand () >> 16)
2670 # else /* RAND_MAX != 2147483647 */
2671 # ifdef USG
2672 # define random rand
2673 # else
2674 # define random() (rand () >> 16)
2675 # endif /* !BSD */
2676 # endif /* RAND_MAX != 2147483647 */
2677 # endif /* RAND_MAX != 32767 */
2678 # endif /* !HAVE_LRAND48 */
2679 # endif /* !HAVE_RANDOM */
2680 #endif /* !RAND_BITS */
2681
2682 void
2683 seed_random (arg)
2684 long arg;
2685 {
2686 #ifdef HAVE_RANDOM
2687 srandom ((unsigned int)arg);
2688 #else
2689 # ifdef HAVE_LRAND48
2690 srand48 (arg);
2691 # else
2692 srand ((unsigned int)arg);
2693 # endif
2694 #endif
2695 }
2696
2697 /*
2698 * Build a full Emacs-sized word out of whatever we've got.
2699 * This suffices even for a 64-bit architecture with a 15-bit rand.
2700 */
2701 long
2702 get_random ()
2703 {
2704 long val = random ();
2705 #if VALBITS > RAND_BITS
2706 val = (val << RAND_BITS) ^ random ();
2707 #if VALBITS > 2*RAND_BITS
2708 val = (val << RAND_BITS) ^ random ();
2709 #if VALBITS > 3*RAND_BITS
2710 val = (val << RAND_BITS) ^ random ();
2711 #if VALBITS > 4*RAND_BITS
2712 val = (val << RAND_BITS) ^ random ();
2713 #endif /* need at least 5 */
2714 #endif /* need at least 4 */
2715 #endif /* need at least 3 */
2716 #endif /* need at least 2 */
2717 return val & ((1L << VALBITS) - 1);
2718 }
2719 \f
2720 #ifdef WRONG_NAME_INSQUE
2721
2722 insque (q,p)
2723 caddr_t q,p;
2724 {
2725 _insque (q,p);
2726 }
2727
2728 #endif
2729 \f
2730 #ifdef VMS
2731
2732 #ifdef getenv
2733 /* If any place else asks for the TERM variable,
2734 allow it to be overridden with the EMACS_TERM variable
2735 before attempting to translate the logical name TERM. As a last
2736 resort, ask for VAX C's special idea of the TERM variable. */
2737 #undef getenv
2738 char *
2739 sys_getenv (name)
2740 char *name;
2741 {
2742 register char *val;
2743 static char buf[256];
2744 static struct dsc$descriptor_s equiv
2745 = {sizeof (buf), DSC$K_DTYPE_T, DSC$K_CLASS_S, buf};
2746 static struct dsc$descriptor_s d_name
2747 = {0, DSC$K_DTYPE_T, DSC$K_CLASS_S, 0};
2748 short eqlen;
2749
2750 if (!strcmp (name, "TERM"))
2751 {
2752 val = (char *) getenv ("EMACS_TERM");
2753 if (val)
2754 return val;
2755 }
2756
2757 d_name.dsc$w_length = strlen (name);
2758 d_name.dsc$a_pointer = name;
2759 if (LIB$SYS_TRNLOG (&d_name, &eqlen, &equiv) == 1)
2760 {
2761 char *str = (char *) xmalloc (eqlen + 1);
2762 bcopy (buf, str, eqlen);
2763 str[eqlen] = '\0';
2764 /* This is a storage leak, but a pain to fix. With luck,
2765 no one will ever notice. */
2766 return str;
2767 }
2768 return (char *) getenv (name);
2769 }
2770 #endif /* getenv */
2771
2772 #ifdef abort
2773 /* Since VMS doesn't believe in core dumps, the only way to debug this beast is
2774 to force a call on the debugger from within the image. */
2775 #undef abort
2776 sys_abort ()
2777 {
2778 reset_sys_modes ();
2779 LIB$SIGNAL (SS$_DEBUG);
2780 }
2781 #endif /* abort */
2782 #endif /* VMS */
2783 \f
2784 #ifdef VMS
2785 #ifdef LINK_CRTL_SHARE
2786 #ifdef SHAREABLE_LIB_BUG
2787 /* Variables declared noshare and initialized in sharable libraries
2788 cannot be shared. The VMS linker incorrectly forces you to use a private
2789 version which is uninitialized... If not for this "feature", we
2790 could use the C library definition of sys_nerr and sys_errlist. */
2791 int sys_nerr = 35;
2792 char *sys_errlist[] =
2793 {
2794 "error 0",
2795 "not owner",
2796 "no such file or directory",
2797 "no such process",
2798 "interrupted system call",
2799 "i/o error",
2800 "no such device or address",
2801 "argument list too long",
2802 "exec format error",
2803 "bad file number",
2804 "no child process",
2805 "no more processes",
2806 "not enough memory",
2807 "permission denied",
2808 "bad address",
2809 "block device required",
2810 "mount devices busy",
2811 "file exists",
2812 "cross-device link",
2813 "no such device",
2814 "not a directory",
2815 "is a directory",
2816 "invalid argument",
2817 "file table overflow",
2818 "too many open files",
2819 "not a typewriter",
2820 "text file busy",
2821 "file too big",
2822 "no space left on device",
2823 "illegal seek",
2824 "read-only file system",
2825 "too many links",
2826 "broken pipe",
2827 "math argument",
2828 "result too large",
2829 "I/O stream empty",
2830 "vax/vms specific error code nontranslatable error"
2831 };
2832 #endif /* SHAREABLE_LIB_BUG */
2833 #endif /* LINK_CRTL_SHARE */
2834 #endif /* VMS */
2835
2836 #ifndef HAVE_STRERROR
2837 #ifndef WINDOWSNT
2838 char *
2839 strerror (errnum)
2840 int errnum;
2841 {
2842 extern char *sys_errlist[];
2843 extern int sys_nerr;
2844
2845 if (errnum >= 0 && errnum < sys_nerr)
2846 return sys_errlist[errnum];
2847 return (char *) "Unknown error";
2848 }
2849 #endif /* not WINDOWSNT */
2850 #endif /* ! HAVE_STRERROR */
2851 \f
2852 #ifdef INTERRUPTIBLE_OPEN
2853
2854 int
2855 /* VARARGS 2 */
2856 sys_open (path, oflag, mode)
2857 char *path;
2858 int oflag, mode;
2859 {
2860 register int rtnval;
2861
2862 while ((rtnval = open (path, oflag, mode)) == -1
2863 && (errno == EINTR));
2864 return (rtnval);
2865 }
2866
2867 #endif /* INTERRUPTIBLE_OPEN */
2868
2869 #ifdef INTERRUPTIBLE_CLOSE
2870
2871 sys_close (fd)
2872 int fd;
2873 {
2874 register int rtnval;
2875
2876 while ((rtnval = close (fd)) == -1
2877 && (errno == EINTR));
2878 return rtnval;
2879 }
2880
2881 #endif /* INTERRUPTIBLE_CLOSE */
2882
2883 #ifdef INTERRUPTIBLE_IO
2884
2885 int
2886 sys_read (fildes, buf, nbyte)
2887 int fildes;
2888 char *buf;
2889 unsigned int nbyte;
2890 {
2891 register int rtnval;
2892
2893 while ((rtnval = read (fildes, buf, nbyte)) == -1
2894 && (errno == EINTR));
2895 return (rtnval);
2896 }
2897
2898 int
2899 sys_write (fildes, buf, nbyte)
2900 int fildes;
2901 char *buf;
2902 unsigned int nbyte;
2903 {
2904 register int rtnval, bytes_written;
2905
2906 bytes_written = 0;
2907
2908 while (nbyte > 0)
2909 {
2910 rtnval = write (fildes, buf, nbyte);
2911
2912 if (rtnval == -1)
2913 {
2914 if (errno == EINTR)
2915 continue;
2916 else
2917 return (bytes_written ? bytes_written : -1);
2918 }
2919
2920 buf += rtnval;
2921 nbyte -= rtnval;
2922 bytes_written += rtnval;
2923 }
2924 return (bytes_written);
2925 }
2926
2927 #endif /* INTERRUPTIBLE_IO */
2928 \f
2929 #ifndef HAVE_VFORK
2930 #ifndef WINDOWSNT
2931 /*
2932 * Substitute fork for vfork on USG flavors.
2933 */
2934
2935 vfork ()
2936 {
2937 return (fork ());
2938 }
2939 #endif /* not WINDOWSNT */
2940 #endif /* not HAVE_VFORK */
2941 \f
2942 #ifdef USG
2943 /*
2944 * All of the following are for USG.
2945 *
2946 * On USG systems the system calls are INTERRUPTIBLE by signals
2947 * that the user program has elected to catch. Thus the system call
2948 * must be retried in these cases. To handle this without massive
2949 * changes in the source code, we remap the standard system call names
2950 * to names for our own functions in sysdep.c that do the system call
2951 * with retries. Actually, for portability reasons, it is good
2952 * programming practice, as this example shows, to limit all actual
2953 * system calls to a single occurrence in the source. Sure, this
2954 * adds an extra level of function call overhead but it is almost
2955 * always negligible. Fred Fish, Unisoft Systems Inc.
2956 */
2957
2958 #ifndef HAVE_SYS_SIGLIST
2959 char *sys_siglist[NSIG + 1] =
2960 {
2961 #ifdef AIX
2962 /* AIX has changed the signals a bit */
2963 "bogus signal", /* 0 */
2964 "hangup", /* 1 SIGHUP */
2965 "interrupt", /* 2 SIGINT */
2966 "quit", /* 3 SIGQUIT */
2967 "illegal instruction", /* 4 SIGILL */
2968 "trace trap", /* 5 SIGTRAP */
2969 "IOT instruction", /* 6 SIGIOT */
2970 "crash likely", /* 7 SIGDANGER */
2971 "floating point exception", /* 8 SIGFPE */
2972 "kill", /* 9 SIGKILL */
2973 "bus error", /* 10 SIGBUS */
2974 "segmentation violation", /* 11 SIGSEGV */
2975 "bad argument to system call", /* 12 SIGSYS */
2976 "write on a pipe with no one to read it", /* 13 SIGPIPE */
2977 "alarm clock", /* 14 SIGALRM */
2978 "software termination signum", /* 15 SIGTERM */
2979 "user defined signal 1", /* 16 SIGUSR1 */
2980 "user defined signal 2", /* 17 SIGUSR2 */
2981 "death of a child", /* 18 SIGCLD */
2982 "power-fail restart", /* 19 SIGPWR */
2983 "bogus signal", /* 20 */
2984 "bogus signal", /* 21 */
2985 "bogus signal", /* 22 */
2986 "bogus signal", /* 23 */
2987 "bogus signal", /* 24 */
2988 "LAN I/O interrupt", /* 25 SIGAIO */
2989 "PTY I/O interrupt", /* 26 SIGPTY */
2990 "I/O intervention required", /* 27 SIGIOINT */
2991 #ifdef AIXHFT
2992 "HFT grant", /* 28 SIGGRANT */
2993 "HFT retract", /* 29 SIGRETRACT */
2994 "HFT sound done", /* 30 SIGSOUND */
2995 "HFT input ready", /* 31 SIGMSG */
2996 #endif
2997 #else /* not AIX */
2998 "bogus signal", /* 0 */
2999 "hangup", /* 1 SIGHUP */
3000 "interrupt", /* 2 SIGINT */
3001 "quit", /* 3 SIGQUIT */
3002 "illegal instruction", /* 4 SIGILL */
3003 "trace trap", /* 5 SIGTRAP */
3004 "IOT instruction", /* 6 SIGIOT */
3005 "EMT instruction", /* 7 SIGEMT */
3006 "floating point exception", /* 8 SIGFPE */
3007 "kill", /* 9 SIGKILL */
3008 "bus error", /* 10 SIGBUS */
3009 "segmentation violation", /* 11 SIGSEGV */
3010 "bad argument to system call", /* 12 SIGSYS */
3011 "write on a pipe with no one to read it", /* 13 SIGPIPE */
3012 "alarm clock", /* 14 SIGALRM */
3013 "software termination signum", /* 15 SIGTERM */
3014 "user defined signal 1", /* 16 SIGUSR1 */
3015 "user defined signal 2", /* 17 SIGUSR2 */
3016 "death of a child", /* 18 SIGCLD */
3017 "power-fail restart", /* 19 SIGPWR */
3018 #ifdef sun
3019 "window size change", /* 20 SIGWINCH */
3020 "urgent socket condition", /* 21 SIGURG */
3021 "pollable event occured", /* 22 SIGPOLL */
3022 "stop (cannot be caught or ignored)", /* 23 SIGSTOP */
3023 "user stop requested from tty", /* 24 SIGTSTP */
3024 "stopped process has been continued", /* 25 SIGCONT */
3025 "background tty read attempted", /* 26 SIGTTIN */
3026 "background tty write attempted", /* 27 SIGTTOU */
3027 "virtual timer expired", /* 28 SIGVTALRM */
3028 "profiling timer expired", /* 29 SIGPROF */
3029 "exceeded cpu limit", /* 30 SIGXCPU */
3030 "exceeded file size limit", /* 31 SIGXFSZ */
3031 "process's lwps are blocked", /* 32 SIGWAITING */
3032 "special signal used by thread library", /* 33 SIGLWP */
3033 #ifdef SIGFREEZE
3034 "Special Signal Used By CPR", /* 34 SIGFREEZE */
3035 #endif
3036 #ifdef SIGTHAW
3037 "Special Signal Used By CPR", /* 35 SIGTHAW */
3038 #endif
3039 #endif /* sun */
3040 #endif /* not AIX */
3041 0
3042 };
3043 #endif /* HAVE_SYS_SIGLIST */
3044
3045 /*
3046 * Warning, this function may not duplicate 4.2 action properly
3047 * under error conditions.
3048 */
3049
3050 #ifndef MAXPATHLEN
3051 /* In 4.1, param.h fails to define this. */
3052 #define MAXPATHLEN 1024
3053 #endif
3054
3055 #ifndef HAVE_GETWD
3056
3057 char *
3058 getwd (pathname)
3059 char *pathname;
3060 {
3061 char *npath, *spath;
3062 extern char *getcwd ();
3063
3064 BLOCK_INPUT; /* getcwd uses malloc */
3065 spath = npath = getcwd ((char *) 0, MAXPATHLEN);
3066 if (spath == 0)
3067 return spath;
3068 /* On Altos 3068, getcwd can return @hostname/dir, so discard
3069 up to first slash. Should be harmless on other systems. */
3070 while (*npath && *npath != '/')
3071 npath++;
3072 strcpy (pathname, npath);
3073 free (spath); /* getcwd uses malloc */
3074 UNBLOCK_INPUT;
3075 return pathname;
3076 }
3077
3078 #endif /* HAVE_GETWD */
3079
3080 /*
3081 * Emulate rename using unlink/link. Note that this is
3082 * only partially correct. Also, doesn't enforce restriction
3083 * that files be of same type (regular->regular, dir->dir, etc).
3084 */
3085
3086 #ifndef HAVE_RENAME
3087
3088 rename (from, to)
3089 const char *from;
3090 const char *to;
3091 {
3092 if (access (from, 0) == 0)
3093 {
3094 unlink (to);
3095 if (link (from, to) == 0)
3096 if (unlink (from) == 0)
3097 return (0);
3098 }
3099 return (-1);
3100 }
3101
3102 #endif
3103
3104
3105 #ifdef HPUX
3106 #ifndef HAVE_PERROR
3107
3108 /* HPUX curses library references perror, but as far as we know
3109 it won't be called. Anyway this definition will do for now. */
3110
3111 perror ()
3112 {
3113 }
3114
3115 #endif /* not HAVE_PERROR */
3116 #endif /* HPUX */
3117
3118 #ifndef HAVE_DUP2
3119
3120 /*
3121 * Emulate BSD dup2. First close newd if it already exists.
3122 * Then, attempt to dup oldd. If not successful, call dup2 recursively
3123 * until we are, then close the unsuccessful ones.
3124 */
3125
3126 dup2 (oldd, newd)
3127 int oldd;
3128 int newd;
3129 {
3130 register int fd, ret;
3131
3132 sys_close (newd);
3133
3134 #ifdef F_DUPFD
3135 fd = fcntl (oldd, F_DUPFD, newd);
3136 if (fd != newd)
3137 error ("can't dup2 (%i,%i) : %s", oldd, newd, strerror (errno));
3138 #else
3139 fd = dup (old);
3140 if (fd == -1)
3141 return -1;
3142 if (fd == new)
3143 return new;
3144 ret = dup2 (old,new);
3145 sys_close (fd);
3146 return ret;
3147 #endif
3148 }
3149
3150 #endif /* not HAVE_DUP2 */
3151
3152 /*
3153 * Gettimeofday. Simulate as much as possible. Only accurate
3154 * to nearest second. Emacs doesn't use tzp so ignore it for now.
3155 * Only needed when subprocesses are defined.
3156 */
3157
3158 #ifdef subprocesses
3159 #ifndef VMS
3160 #ifndef HAVE_GETTIMEOFDAY
3161 #ifdef HAVE_TIMEVAL
3162
3163 /* ARGSUSED */
3164 gettimeofday (tp, tzp)
3165 struct timeval *tp;
3166 struct timezone *tzp;
3167 {
3168 extern long time ();
3169
3170 tp->tv_sec = time ((long *)0);
3171 tp->tv_usec = 0;
3172 if (tzp != 0)
3173 tzp->tz_minuteswest = -1;
3174 }
3175
3176 #endif
3177 #endif
3178 #endif
3179 #endif /* subprocess && !HAVE_GETTIMEOFDAY && HAVE_TIMEVAL && !VMS */
3180
3181 /*
3182 * This function will go away as soon as all the stubs fixed. (fnf)
3183 */
3184
3185 croak (badfunc)
3186 char *badfunc;
3187 {
3188 printf ("%s not yet implemented\r\n", badfunc);
3189 reset_sys_modes ();
3190 exit (1);
3191 }
3192
3193 #endif /* USG */
3194 \f
3195 #ifdef DGUX
3196
3197 char *sys_siglist[NSIG + 1] =
3198 {
3199 "null signal", /* 0 SIGNULL */
3200 "hangup", /* 1 SIGHUP */
3201 "interrupt", /* 2 SIGINT */
3202 "quit", /* 3 SIGQUIT */
3203 "illegal instruction", /* 4 SIGILL */
3204 "trace trap", /* 5 SIGTRAP */
3205 "abort termination", /* 6 SIGABRT */
3206 "SIGEMT", /* 7 SIGEMT */
3207 "floating point exception", /* 8 SIGFPE */
3208 "kill", /* 9 SIGKILL */
3209 "bus error", /* 10 SIGBUS */
3210 "segmentation violation", /* 11 SIGSEGV */
3211 "bad argument to system call", /* 12 SIGSYS */
3212 "write on a pipe with no reader", /* 13 SIGPIPE */
3213 "alarm clock", /* 14 SIGALRM */
3214 "software termination signal", /* 15 SIGTERM */
3215 "user defined signal 1", /* 16 SIGUSR1 */
3216 "user defined signal 2", /* 17 SIGUSR2 */
3217 "child stopped or terminated", /* 18 SIGCLD */
3218 "power-fail restart", /* 19 SIGPWR */
3219 "window size changed", /* 20 SIGWINCH */
3220 "undefined", /* 21 */
3221 "pollable event occurred", /* 22 SIGPOLL */
3222 "sendable stop signal not from tty", /* 23 SIGSTOP */
3223 "stop signal from tty", /* 24 SIGSTP */
3224 "continue a stopped process", /* 25 SIGCONT */
3225 "attempted background tty read", /* 26 SIGTTIN */
3226 "attempted background tty write", /* 27 SIGTTOU */
3227 "undefined", /* 28 */
3228 "undefined", /* 29 */
3229 "undefined", /* 30 */
3230 "undefined", /* 31 */
3231 "undefined", /* 32 */
3232 "socket (TCP/IP) urgent data arrival", /* 33 SIGURG */
3233 "I/O is possible", /* 34 SIGIO */
3234 "exceeded cpu time limit", /* 35 SIGXCPU */
3235 "exceeded file size limit", /* 36 SIGXFSZ */
3236 "virtual time alarm", /* 37 SIGVTALRM */
3237 "profiling time alarm", /* 38 SIGPROF */
3238 "undefined", /* 39 */
3239 "file record locks revoked", /* 40 SIGLOST */
3240 "undefined", /* 41 */
3241 "undefined", /* 42 */
3242 "undefined", /* 43 */
3243 "undefined", /* 44 */
3244 "undefined", /* 45 */
3245 "undefined", /* 46 */
3246 "undefined", /* 47 */
3247 "undefined", /* 48 */
3248 "undefined", /* 49 */
3249 "undefined", /* 50 */
3250 "undefined", /* 51 */
3251 "undefined", /* 52 */
3252 "undefined", /* 53 */
3253 "undefined", /* 54 */
3254 "undefined", /* 55 */
3255 "undefined", /* 56 */
3256 "undefined", /* 57 */
3257 "undefined", /* 58 */
3258 "undefined", /* 59 */
3259 "undefined", /* 60 */
3260 "undefined", /* 61 */
3261 "undefined", /* 62 */
3262 "undefined", /* 63 */
3263 "notification message in mess. queue", /* 64 SIGDGNOTIFY */
3264 0
3265 };
3266
3267 #endif /* DGUX */
3268 \f
3269 /* Directory routines for systems that don't have them. */
3270
3271 #ifdef SYSV_SYSTEM_DIR
3272
3273 #include <dirent.h>
3274
3275 #if defined(BROKEN_CLOSEDIR) || !defined(HAVE_CLOSEDIR)
3276
3277 int
3278 closedir (dirp)
3279 register DIR *dirp; /* stream from opendir */
3280 {
3281 int rtnval;
3282
3283 rtnval = sys_close (dirp->dd_fd);
3284
3285 /* Some systems (like Solaris) allocate the buffer and the DIR all
3286 in one block. Why in the world are we freeing this ourselves
3287 anyway? */
3288 #if ! (defined (sun) && defined (USG5_4))
3289 xfree ((char *) dirp->dd_buf); /* directory block defined in <dirent.h> */
3290 #endif
3291 xfree ((char *) dirp);
3292
3293 return rtnval;
3294 }
3295 #endif /* BROKEN_CLOSEDIR or not HAVE_CLOSEDIR */
3296 #endif /* SYSV_SYSTEM_DIR */
3297
3298 #ifdef NONSYSTEM_DIR_LIBRARY
3299
3300 DIR *
3301 opendir (filename)
3302 char *filename; /* name of directory */
3303 {
3304 register DIR *dirp; /* -> malloc'ed storage */
3305 register int fd; /* file descriptor for read */
3306 struct stat sbuf; /* result of fstat */
3307
3308 fd = sys_open (filename, 0);
3309 if (fd < 0)
3310 return 0;
3311
3312 BLOCK_INPUT;
3313 if (fstat (fd, &sbuf) < 0
3314 || (sbuf.st_mode & S_IFMT) != S_IFDIR
3315 || (dirp = (DIR *) malloc (sizeof (DIR))) == 0)
3316 {
3317 sys_close (fd);
3318 UNBLOCK_INPUT;
3319 return 0; /* bad luck today */
3320 }
3321 UNBLOCK_INPUT;
3322
3323 dirp->dd_fd = fd;
3324 dirp->dd_loc = dirp->dd_size = 0; /* refill needed */
3325
3326 return dirp;
3327 }
3328
3329 void
3330 closedir (dirp)
3331 register DIR *dirp; /* stream from opendir */
3332 {
3333 sys_close (dirp->dd_fd);
3334 xfree ((char *) dirp);
3335 }
3336
3337
3338 #ifndef VMS
3339 #define DIRSIZ 14
3340 struct olddir
3341 {
3342 ino_t od_ino; /* inode */
3343 char od_name[DIRSIZ]; /* filename */
3344 };
3345 #endif /* not VMS */
3346
3347 struct direct dir_static; /* simulated directory contents */
3348
3349 /* ARGUSED */
3350 struct direct *
3351 readdir (dirp)
3352 register DIR *dirp; /* stream from opendir */
3353 {
3354 #ifndef VMS
3355 register struct olddir *dp; /* -> directory data */
3356 #else /* VMS */
3357 register struct dir$_name *dp; /* -> directory data */
3358 register struct dir$_version *dv; /* -> version data */
3359 #endif /* VMS */
3360
3361 for (; ;)
3362 {
3363 if (dirp->dd_loc >= dirp->dd_size)
3364 dirp->dd_loc = dirp->dd_size = 0;
3365
3366 if (dirp->dd_size == 0 /* refill buffer */
3367 && (dirp->dd_size = sys_read (dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ)) <= 0)
3368 return 0;
3369
3370 #ifndef VMS
3371 dp = (struct olddir *) &dirp->dd_buf[dirp->dd_loc];
3372 dirp->dd_loc += sizeof (struct olddir);
3373
3374 if (dp->od_ino != 0) /* not deleted entry */
3375 {
3376 dir_static.d_ino = dp->od_ino;
3377 strncpy (dir_static.d_name, dp->od_name, DIRSIZ);
3378 dir_static.d_name[DIRSIZ] = '\0';
3379 dir_static.d_namlen = strlen (dir_static.d_name);
3380 dir_static.d_reclen = sizeof (struct direct)
3381 - MAXNAMLEN + 3
3382 + dir_static.d_namlen - dir_static.d_namlen % 4;
3383 return &dir_static; /* -> simulated structure */
3384 }
3385 #else /* VMS */
3386 dp = (struct dir$_name *) dirp->dd_buf;
3387 if (dirp->dd_loc == 0)
3388 dirp->dd_loc = (dp->dir$b_namecount&1) ? dp->dir$b_namecount + 1
3389 : dp->dir$b_namecount;
3390 dv = (struct dir$_version *)&dp->dir$t_name[dirp->dd_loc];
3391 dir_static.d_ino = dv->dir$w_fid_num;
3392 dir_static.d_namlen = dp->dir$b_namecount;
3393 dir_static.d_reclen = sizeof (struct direct)
3394 - MAXNAMLEN + 3
3395 + dir_static.d_namlen - dir_static.d_namlen % 4;
3396 strncpy (dir_static.d_name, dp->dir$t_name, dp->dir$b_namecount);
3397 dir_static.d_name[dir_static.d_namlen] = '\0';
3398 dirp->dd_loc = dirp->dd_size; /* only one record at a time */
3399 return &dir_static;
3400 #endif /* VMS */
3401 }
3402 }
3403
3404 #ifdef VMS
3405 /* readdirver is just like readdir except it returns all versions of a file
3406 as separate entries. */
3407
3408 /* ARGUSED */
3409 struct direct *
3410 readdirver (dirp)
3411 register DIR *dirp; /* stream from opendir */
3412 {
3413 register struct dir$_name *dp; /* -> directory data */
3414 register struct dir$_version *dv; /* -> version data */
3415
3416 if (dirp->dd_loc >= dirp->dd_size - sizeof (struct dir$_name))
3417 dirp->dd_loc = dirp->dd_size = 0;
3418
3419 if (dirp->dd_size == 0 /* refill buffer */
3420 && (dirp->dd_size = sys_read (dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ)) <= 0)
3421 return 0;
3422
3423 dp = (struct dir$_name *) dirp->dd_buf;
3424 if (dirp->dd_loc == 0)
3425 dirp->dd_loc = (dp->dir$b_namecount & 1) ? dp->dir$b_namecount + 1
3426 : dp->dir$b_namecount;
3427 dv = (struct dir$_version *) &dp->dir$t_name[dirp->dd_loc];
3428 strncpy (dir_static.d_name, dp->dir$t_name, dp->dir$b_namecount);
3429 sprintf (&dir_static.d_name[dp->dir$b_namecount], ";%d", dv->dir$w_version);
3430 dir_static.d_namlen = strlen (dir_static.d_name);
3431 dir_static.d_ino = dv->dir$w_fid_num;
3432 dir_static.d_reclen = sizeof (struct direct) - MAXNAMLEN + 3
3433 + dir_static.d_namlen - dir_static.d_namlen % 4;
3434 dirp->dd_loc = ((char *) (++dv) - dp->dir$t_name);
3435 return &dir_static;
3436 }
3437
3438 #endif /* VMS */
3439
3440 #endif /* NONSYSTEM_DIR_LIBRARY */
3441
3442 \f
3443 int
3444 set_file_times (filename, atime, mtime)
3445 char *filename;
3446 EMACS_TIME atime, mtime;
3447 {
3448 #ifdef HAVE_UTIMES
3449 struct timeval tv[2];
3450 tv[0] = atime;
3451 tv[1] = mtime;
3452 return utimes (filename, tv);
3453 #else /* not HAVE_UTIMES */
3454 struct utimbuf utb;
3455 utb.actime = EMACS_SECS (atime);
3456 utb.modtime = EMACS_SECS (mtime);
3457 return utime (filename, &utb);
3458 #endif /* not HAVE_UTIMES */
3459 }
3460 \f
3461 /* mkdir and rmdir functions, for systems which don't have them. */
3462
3463 #ifndef HAVE_MKDIR
3464 /*
3465 * Written by Robert Rother, Mariah Corporation, August 1985.
3466 *
3467 * If you want it, it's yours. All I ask in return is that if you
3468 * figure out how to do this in a Bourne Shell script you send me
3469 * a copy.
3470 * sdcsvax!rmr or rmr@uscd
3471 *
3472 * Severely hacked over by John Gilmore to make a 4.2BSD compatible
3473 * subroutine. 11Mar86; hoptoad!gnu
3474 *
3475 * Modified by rmtodd@uokmax 6-28-87 -- when making an already existing dir,
3476 * subroutine didn't return EEXIST. It does now.
3477 */
3478
3479 /*
3480 * Make a directory.
3481 */
3482 #ifdef MKDIR_PROTOTYPE
3483 MKDIR_PROTOTYPE
3484 #else
3485 int
3486 mkdir (dpath, dmode)
3487 char *dpath;
3488 int dmode;
3489 #endif
3490 {
3491 int cpid, status, fd;
3492 struct stat statbuf;
3493
3494 if (stat (dpath, &statbuf) == 0)
3495 {
3496 errno = EEXIST; /* Stat worked, so it already exists */
3497 return -1;
3498 }
3499
3500 /* If stat fails for a reason other than non-existence, return error */
3501 if (errno != ENOENT)
3502 return -1;
3503
3504 synch_process_alive = 1;
3505 switch (cpid = fork ())
3506 {
3507
3508 case -1: /* Error in fork */
3509 return (-1); /* Errno is set already */
3510
3511 case 0: /* Child process */
3512 /*
3513 * Cheap hack to set mode of new directory. Since this
3514 * child process is going away anyway, we zap its umask.
3515 * FIXME, this won't suffice to set SUID, SGID, etc. on this
3516 * directory. Does anybody care?
3517 */
3518 status = umask (0); /* Get current umask */
3519 status = umask (status | (0777 & ~dmode)); /* Set for mkdir */
3520 fd = sys_open("/dev/null", 2);
3521 if (fd >= 0)
3522 {
3523 dup2 (fd, 0);
3524 dup2 (fd, 1);
3525 dup2 (fd, 2);
3526 }
3527 execl ("/bin/mkdir", "mkdir", dpath, (char *) 0);
3528 _exit (-1); /* Can't exec /bin/mkdir */
3529
3530 default: /* Parent process */
3531 wait_for_termination (cpid);
3532 }
3533
3534 if (synch_process_death != 0 || synch_process_retcode != 0)
3535 {
3536 errno = EIO; /* We don't know why, but */
3537 return -1; /* /bin/mkdir failed */
3538 }
3539
3540 return 0;
3541 }
3542 #endif /* not HAVE_MKDIR */
3543
3544 #ifndef HAVE_RMDIR
3545 int
3546 rmdir (dpath)
3547 char *dpath;
3548 {
3549 int cpid, status, fd;
3550 struct stat statbuf;
3551
3552 if (stat (dpath, &statbuf) != 0)
3553 {
3554 /* Stat just set errno. We don't have to */
3555 return -1;
3556 }
3557
3558 synch_process_alive = 1;
3559 switch (cpid = fork ())
3560 {
3561
3562 case -1: /* Error in fork */
3563 return (-1); /* Errno is set already */
3564
3565 case 0: /* Child process */
3566 fd = sys_open("/dev/null", 2);
3567 if (fd >= 0)
3568 {
3569 dup2 (fd, 0);
3570 dup2 (fd, 1);
3571 dup2 (fd, 2);
3572 }
3573 wait_for_termination (cpid);
3574 if (synch_process_death != 0 || synch_process_retcode != 0)
3575 return -1; /* /bin/rmdir failed */
3576 default: /* Parent process */
3577 while (cpid != wait (&status)); /* Wait for kid to finish */
3578 }
3579
3580 if (WIFSIGNALED (status) || WEXITSTATUS (status) != 0)
3581 {
3582 errno = EIO; /* We don't know why, but */
3583 return -1; /* /bin/mkdir failed */
3584 }
3585
3586 return 0;
3587 }
3588 #endif /* !HAVE_RMDIR */
3589
3590
3591 \f
3592 /* Functions for VMS */
3593 #ifdef VMS
3594 #include "vms-pwd.h"
3595 #include <acldef.h>
3596 #include <chpdef.h>
3597 #include <jpidef.h>
3598
3599 /* Return as a string the VMS error string pertaining to STATUS.
3600 Reuses the same static buffer each time it is called. */
3601
3602 char *
3603 vmserrstr (status)
3604 int status; /* VMS status code */
3605 {
3606 int bufadr[2];
3607 short len;
3608 static char buf[257];
3609
3610 bufadr[0] = sizeof buf - 1;
3611 bufadr[1] = (int) buf;
3612 if (! (SYS$GETMSG (status, &len, bufadr, 0x1, 0) & 1))
3613 return "untranslatable VMS error status";
3614 buf[len] = '\0';
3615 return buf;
3616 }
3617
3618 #ifdef access
3619 #undef access
3620
3621 /* The following is necessary because 'access' emulation by VMS C (2.0) does
3622 * not work correctly. (It also doesn't work well in version 2.3.)
3623 */
3624
3625 #ifdef VMS4_4
3626
3627 #define DESCRIPTOR(name,string) struct dsc$descriptor_s name = \
3628 { strlen (string), DSC$K_DTYPE_T, DSC$K_CLASS_S, string }
3629
3630 typedef union {
3631 struct {
3632 unsigned short s_buflen;
3633 unsigned short s_code;
3634 char *s_bufadr;
3635 unsigned short *s_retlenadr;
3636 } s;
3637 int end;
3638 } item;
3639 #define buflen s.s_buflen
3640 #define code s.s_code
3641 #define bufadr s.s_bufadr
3642 #define retlenadr s.s_retlenadr
3643
3644 #define R_OK 4 /* test for read permission */
3645 #define W_OK 2 /* test for write permission */
3646 #define X_OK 1 /* test for execute (search) permission */
3647 #define F_OK 0 /* test for presence of file */
3648
3649 int
3650 sys_access (path, mode)
3651 char *path;
3652 int mode;
3653 {
3654 static char *user = NULL;
3655 char dir_fn[512];
3656
3657 /* translate possible directory spec into .DIR file name, so brain-dead
3658 * access can treat the directory like a file. */
3659 if (directory_file_name (path, dir_fn))
3660 path = dir_fn;
3661
3662 if (mode == F_OK)
3663 return access (path, mode);
3664 if (user == NULL && (user = (char *) getenv ("USER")) == NULL)
3665 return -1;
3666 {
3667 int stat;
3668 int flags;
3669 int acces;
3670 unsigned short int dummy;
3671 item itemlst[3];
3672 static int constant = ACL$C_FILE;
3673 DESCRIPTOR (path_desc, path);
3674 DESCRIPTOR (user_desc, user);
3675
3676 flags = 0;
3677 acces = 0;
3678 if ((mode & X_OK) && ((stat = access (path, mode)) < 0 || mode == X_OK))
3679 return stat;
3680 if (mode & R_OK)
3681 acces |= CHP$M_READ;
3682 if (mode & W_OK)
3683 acces |= CHP$M_WRITE;
3684 itemlst[0].buflen = sizeof (int);
3685 itemlst[0].code = CHP$_FLAGS;
3686 itemlst[0].bufadr = (char *) &flags;
3687 itemlst[0].retlenadr = &dummy;
3688 itemlst[1].buflen = sizeof (int);
3689 itemlst[1].code = CHP$_ACCESS;
3690 itemlst[1].bufadr = (char *) &acces;
3691 itemlst[1].retlenadr = &dummy;
3692 itemlst[2].end = CHP$_END;
3693 stat = SYS$CHECK_ACCESS (&constant, &path_desc, &user_desc, itemlst);
3694 return stat == SS$_NORMAL ? 0 : -1;
3695 }
3696 }
3697
3698 #else /* not VMS4_4 */
3699
3700 #include <prvdef.h>
3701 #define ACE$M_WRITE 2
3702 #define ACE$C_KEYID 1
3703
3704 static unsigned short memid, grpid;
3705 static unsigned int uic;
3706
3707 /* Called from init_sys_modes, so it happens not very often
3708 but at least each time Emacs is loaded. */
3709 sys_access_reinit ()
3710 {
3711 uic = 0;
3712 }
3713
3714 int
3715 sys_access (filename, type)
3716 char * filename;
3717 int type;
3718 {
3719 struct FAB fab;
3720 struct XABPRO xab;
3721 int status, size, i, typecode, acl_controlled;
3722 unsigned int *aclptr, *aclend, aclbuf[60];
3723 union prvdef prvmask;
3724
3725 /* Get UIC and GRP values for protection checking. */
3726 if (uic == 0)
3727 {
3728 status = LIB$GETJPI (&JPI$_UIC, 0, 0, &uic, 0, 0);
3729 if (! (status & 1))
3730 return -1;
3731 memid = uic & 0xFFFF;
3732 grpid = uic >> 16;
3733 }
3734
3735 if (type != 2) /* not checking write access */
3736 return access (filename, type);
3737
3738 /* Check write protection. */
3739
3740 #define CHECKPRIV(bit) (prvmask.bit)
3741 #define WRITEABLE(field) (! ((xab.xab$w_pro >> field) & XAB$M_NOWRITE))
3742
3743 /* Find privilege bits */
3744 status = SYS$SETPRV (0, 0, 0, prvmask);
3745 if (! (status & 1))
3746 error ("Unable to find privileges: %s", vmserrstr (status));
3747 if (CHECKPRIV (PRV$V_BYPASS))
3748 return 0; /* BYPASS enabled */
3749 fab = cc$rms_fab;
3750 fab.fab$b_fac = FAB$M_GET;
3751 fab.fab$l_fna = filename;
3752 fab.fab$b_fns = strlen (filename);
3753 fab.fab$l_xab = &xab;
3754 xab = cc$rms_xabpro;
3755 xab.xab$l_aclbuf = aclbuf;
3756 xab.xab$w_aclsiz = sizeof (aclbuf);
3757 status = SYS$OPEN (&fab, 0, 0);
3758 if (! (status & 1))
3759 return -1;
3760 SYS$CLOSE (&fab, 0, 0);
3761 /* Check system access */
3762 if (CHECKPRIV (PRV$V_SYSPRV) && WRITEABLE (XAB$V_SYS))
3763 return 0;
3764 /* Check ACL entries, if any */
3765 acl_controlled = 0;
3766 if (xab.xab$w_acllen > 0)
3767 {
3768 aclptr = aclbuf;
3769 aclend = &aclbuf[xab.xab$w_acllen / 4];
3770 while (*aclptr && aclptr < aclend)
3771 {
3772 size = (*aclptr & 0xff) / 4;
3773 typecode = (*aclptr >> 8) & 0xff;
3774 if (typecode == ACE$C_KEYID)
3775 for (i = size - 1; i > 1; i--)
3776 if (aclptr[i] == uic)
3777 {
3778 acl_controlled = 1;
3779 if (aclptr[1] & ACE$M_WRITE)
3780 return 0; /* Write access through ACL */
3781 }
3782 aclptr = &aclptr[size];
3783 }
3784 if (acl_controlled) /* ACL specified, prohibits write access */
3785 return -1;
3786 }
3787 /* No ACL entries specified, check normal protection */
3788 if (WRITEABLE (XAB$V_WLD)) /* World writeable */
3789 return 0;
3790 if (WRITEABLE (XAB$V_GRP) &&
3791 (unsigned short) (xab.xab$l_uic >> 16) == grpid)
3792 return 0; /* Group writeable */
3793 if (WRITEABLE (XAB$V_OWN) &&
3794 (xab.xab$l_uic & 0xFFFF) == memid)
3795 return 0; /* Owner writeable */
3796
3797 return -1; /* Not writeable */
3798 }
3799 #endif /* not VMS4_4 */
3800 #endif /* access */
3801
3802 static char vtbuf[NAM$C_MAXRSS+1];
3803
3804 /* translate a vms file spec to a unix path */
3805 char *
3806 sys_translate_vms (vfile)
3807 char * vfile;
3808 {
3809 char * p;
3810 char * targ;
3811
3812 if (!vfile)
3813 return 0;
3814
3815 targ = vtbuf;
3816
3817 /* leading device or logical name is a root directory */
3818 if (p = strchr (vfile, ':'))
3819 {
3820 *targ++ = '/';
3821 while (vfile < p)
3822 *targ++ = *vfile++;
3823 vfile++;
3824 *targ++ = '/';
3825 }
3826 p = vfile;
3827 if (*p == '[' || *p == '<')
3828 {
3829 while (*++vfile != *p + 2)
3830 switch (*vfile)
3831 {
3832 case '.':
3833 if (vfile[-1] == *p)
3834 *targ++ = '.';
3835 *targ++ = '/';
3836 break;
3837
3838 case '-':
3839 *targ++ = '.';
3840 *targ++ = '.';
3841 break;
3842
3843 default:
3844 *targ++ = *vfile;
3845 break;
3846 }
3847 vfile++;
3848 *targ++ = '/';
3849 }
3850 while (*vfile)
3851 *targ++ = *vfile++;
3852
3853 return vtbuf;
3854 }
3855
3856 static char utbuf[NAM$C_MAXRSS+1];
3857
3858 /* translate a unix path to a VMS file spec */
3859 char *
3860 sys_translate_unix (ufile)
3861 char * ufile;
3862 {
3863 int slash_seen = 0;
3864 char *p;
3865 char * targ;
3866
3867 if (!ufile)
3868 return 0;
3869
3870 targ = utbuf;
3871
3872 if (*ufile == '/')
3873 {
3874 ufile++;
3875 }
3876
3877 while (*ufile)
3878 {
3879 switch (*ufile)
3880 {
3881 case '/':
3882 if (slash_seen)
3883 if (index (&ufile[1], '/'))
3884 *targ++ = '.';
3885 else
3886 *targ++ = ']';
3887 else
3888 {
3889 *targ++ = ':';
3890 if (index (&ufile[1], '/'))
3891 *targ++ = '[';
3892 slash_seen = 1;
3893 }
3894 break;
3895
3896 case '.':
3897 if (strncmp (ufile, "./", 2) == 0)
3898 {
3899 if (!slash_seen)
3900 {
3901 *targ++ = '[';
3902 slash_seen = 1;
3903 }
3904 ufile++; /* skip the dot */
3905 if (index (&ufile[1], '/'))
3906 *targ++ = '.';
3907 else
3908 *targ++ = ']';
3909 }
3910 else if (strncmp (ufile, "../", 3) == 0)
3911 {
3912 if (!slash_seen)
3913 {
3914 *targ++ = '[';
3915 slash_seen = 1;
3916 }
3917 *targ++ = '-';
3918 ufile += 2; /* skip the dots */
3919 if (index (&ufile[1], '/'))
3920 *targ++ = '.';
3921 else
3922 *targ++ = ']';
3923 }
3924 else
3925 *targ++ = *ufile;
3926 break;
3927
3928 default:
3929 *targ++ = *ufile;
3930 break;
3931 }
3932 ufile++;
3933 }
3934 *targ = '\0';
3935
3936 return utbuf;
3937 }
3938
3939 char *
3940 getwd (pathname)
3941 char *pathname;
3942 {
3943 char *ptr, *val;
3944 extern char *getcwd ();
3945
3946 #define MAXPATHLEN 1024
3947
3948 ptr = xmalloc (MAXPATHLEN);
3949 val = getcwd (ptr, MAXPATHLEN);
3950 if (val == 0)
3951 {
3952 xfree (ptr);
3953 return val;
3954 }
3955 strcpy (pathname, ptr);
3956 xfree (ptr);
3957
3958 return pathname;
3959 }
3960
3961 getppid ()
3962 {
3963 long item_code = JPI$_OWNER;
3964 unsigned long parent_id;
3965 int status;
3966
3967 if (((status = LIB$GETJPI (&item_code, 0, 0, &parent_id)) & 1) == 0)
3968 {
3969 errno = EVMSERR;
3970 vaxc$errno = status;
3971 return -1;
3972 }
3973 return parent_id;
3974 }
3975
3976 #undef getuid
3977 unsigned
3978 sys_getuid ()
3979 {
3980 return (getgid () << 16) | getuid ();
3981 }
3982
3983 int
3984 sys_read (fildes, buf, nbyte)
3985 int fildes;
3986 char *buf;
3987 unsigned int nbyte;
3988 {
3989 return read (fildes, buf, (nbyte < MAXIOSIZE ? nbyte : MAXIOSIZE));
3990 }
3991
3992 #if 0
3993 int
3994 sys_write (fildes, buf, nbyte)
3995 int fildes;
3996 char *buf;
3997 unsigned int nbyte;
3998 {
3999 register int nwrote, rtnval = 0;
4000
4001 while (nbyte > MAXIOSIZE && (nwrote = write (fildes, buf, MAXIOSIZE)) > 0) {
4002 nbyte -= nwrote;
4003 buf += nwrote;
4004 rtnval += nwrote;
4005 }
4006 if (nwrote < 0)
4007 return rtnval ? rtnval : -1;
4008 if ((nwrote = write (fildes, buf, nbyte)) < 0)
4009 return rtnval ? rtnval : -1;
4010 return (rtnval + nwrote);
4011 }
4012 #endif /* 0 */
4013
4014 /*
4015 * VAX/VMS VAX C RTL really loses. It insists that records
4016 * end with a newline (carriage return) character, and if they
4017 * don't it adds one (nice of it isn't it!)
4018 *
4019 * Thus we do this stupidity below.
4020 */
4021
4022 int
4023 sys_write (fildes, buf, nbytes)
4024 int fildes;
4025 char *buf;
4026 unsigned int nbytes;
4027 {
4028 register char *p;
4029 register char *e;
4030 int sum = 0;
4031 struct stat st;
4032
4033 fstat (fildes, &st);
4034 p = buf;
4035 while (nbytes > 0)
4036 {
4037 int len, retval;
4038
4039 /* Handle fixed-length files with carriage control. */
4040 if (st.st_fab_rfm == FAB$C_FIX
4041 && ((st.st_fab_rat & (FAB$M_FTN | FAB$M_CR)) != 0))
4042 {
4043 len = st.st_fab_mrs;
4044 retval = write (fildes, p, min (len, nbytes));
4045 if (retval != len)
4046 return -1;
4047 retval++; /* This skips the implied carriage control */
4048 }
4049 else
4050 {
4051 e = p + min (MAXIOSIZE, nbytes) - 1;
4052 while (*e != '\n' && e > p) e--;
4053 if (p == e) /* Ok.. so here we add a newline... sigh. */
4054 e = p + min (MAXIOSIZE, nbytes) - 1;
4055 len = e + 1 - p;
4056 retval = write (fildes, p, len);
4057 if (retval != len)
4058 return -1;
4059 }
4060 p += retval;
4061 sum += retval;
4062 nbytes -= retval;
4063 }
4064 return sum;
4065 }
4066
4067 /* Create file NEW copying its attributes from file OLD. If
4068 OLD is 0 or does not exist, create based on the value of
4069 vms_stmlf_recfm. */
4070
4071 /* Protection value the file should ultimately have.
4072 Set by create_copy_attrs, and use by rename_sansversions. */
4073 static unsigned short int fab_final_pro;
4074
4075 int
4076 creat_copy_attrs (old, new)
4077 char *old, *new;
4078 {
4079 struct FAB fab = cc$rms_fab;
4080 struct XABPRO xabpro;
4081 char aclbuf[256]; /* Choice of size is arbitrary. See below. */
4082 extern int vms_stmlf_recfm;
4083
4084 if (old)
4085 {
4086 fab.fab$b_fac = FAB$M_GET;
4087 fab.fab$l_fna = old;
4088 fab.fab$b_fns = strlen (old);
4089 fab.fab$l_xab = (char *) &xabpro;
4090 xabpro = cc$rms_xabpro;
4091 xabpro.xab$l_aclbuf = aclbuf;
4092 xabpro.xab$w_aclsiz = sizeof aclbuf;
4093 /* Call $OPEN to fill in the fab & xabpro fields. */
4094 if (SYS$OPEN (&fab, 0, 0) & 1)
4095 {
4096 SYS$CLOSE (&fab, 0, 0);
4097 fab.fab$l_alq = 0; /* zero the allocation quantity */
4098 if (xabpro.xab$w_acllen > 0)
4099 {
4100 if (xabpro.xab$w_acllen > sizeof aclbuf)
4101 /* If the acl buffer was too short, redo open with longer one.
4102 Wouldn't need to do this if there were some system imposed
4103 limit on the size of an ACL, but I can't find any such. */
4104 {
4105 xabpro.xab$l_aclbuf = (char *) alloca (xabpro.xab$w_acllen);
4106 xabpro.xab$w_aclsiz = xabpro.xab$w_acllen;
4107 if (SYS$OPEN (&fab, 0, 0) & 1)
4108 SYS$CLOSE (&fab, 0, 0);
4109 else
4110 old = 0;
4111 }
4112 }
4113 else
4114 xabpro.xab$l_aclbuf = 0;
4115 }
4116 else
4117 old = 0;
4118 }
4119 fab.fab$l_fna = new;
4120 fab.fab$b_fns = strlen (new);
4121 if (!old)
4122 {
4123 fab.fab$l_xab = 0;
4124 fab.fab$b_rfm = vms_stmlf_recfm ? FAB$C_STMLF : FAB$C_VAR;
4125 fab.fab$b_rat = FAB$M_CR;
4126 }
4127
4128 /* Set the file protections such that we will be able to manipulate
4129 this file. Once we are done writing and renaming it, we will set
4130 the protections back. */
4131 if (old)
4132 fab_final_pro = xabpro.xab$w_pro;
4133 else
4134 SYS$SETDFPROT (0, &fab_final_pro);
4135 xabpro.xab$w_pro &= 0xff0f; /* set O:rewd for now. This is set back later. */
4136
4137 /* Create the new file with either default attrs or attrs copied
4138 from old file. */
4139 if (!(SYS$CREATE (&fab, 0, 0) & 1))
4140 return -1;
4141 SYS$CLOSE (&fab, 0, 0);
4142 /* As this is a "replacement" for creat, return a file descriptor
4143 opened for writing. */
4144 return open (new, O_WRONLY);
4145 }
4146
4147 #ifdef creat
4148 #undef creat
4149 #include <varargs.h>
4150 #ifdef __GNUC__
4151 #ifndef va_count
4152 #define va_count(X) ((X) = *(((int *) &(va_alist)) - 1))
4153 #endif
4154 #endif
4155
4156 sys_creat (va_alist)
4157 va_dcl
4158 {
4159 va_list list_incrementer;
4160 char *name;
4161 int mode;
4162 int rfd; /* related file descriptor */
4163 int fd; /* Our new file descriptor */
4164 int count;
4165 struct stat st_buf;
4166 char rfm[12];
4167 char rat[15];
4168 char mrs[13];
4169 char fsz[13];
4170 extern int vms_stmlf_recfm;
4171
4172 va_count (count);
4173 va_start (list_incrementer);
4174 name = va_arg (list_incrementer, char *);
4175 mode = va_arg (list_incrementer, int);
4176 if (count > 2)
4177 rfd = va_arg (list_incrementer, int);
4178 va_end (list_incrementer);
4179 if (count > 2)
4180 {
4181 /* Use information from the related file descriptor to set record
4182 format of the newly created file. */
4183 fstat (rfd, &st_buf);
4184 switch (st_buf.st_fab_rfm)
4185 {
4186 case FAB$C_FIX:
4187 strcpy (rfm, "rfm = fix");
4188 sprintf (mrs, "mrs = %d", st_buf.st_fab_mrs);
4189 strcpy (rat, "rat = ");
4190 if (st_buf.st_fab_rat & FAB$M_CR)
4191 strcat (rat, "cr");
4192 else if (st_buf.st_fab_rat & FAB$M_FTN)
4193 strcat (rat, "ftn");
4194 else if (st_buf.st_fab_rat & FAB$M_PRN)
4195 strcat (rat, "prn");
4196 if (st_buf.st_fab_rat & FAB$M_BLK)
4197 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4198 strcat (rat, ", blk");
4199 else
4200 strcat (rat, "blk");
4201 return creat (name, 0, rfm, rat, mrs);
4202
4203 case FAB$C_VFC:
4204 strcpy (rfm, "rfm = vfc");
4205 sprintf (fsz, "fsz = %d", st_buf.st_fab_fsz);
4206 strcpy (rat, "rat = ");
4207 if (st_buf.st_fab_rat & FAB$M_CR)
4208 strcat (rat, "cr");
4209 else if (st_buf.st_fab_rat & FAB$M_FTN)
4210 strcat (rat, "ftn");
4211 else if (st_buf.st_fab_rat & FAB$M_PRN)
4212 strcat (rat, "prn");
4213 if (st_buf.st_fab_rat & FAB$M_BLK)
4214 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4215 strcat (rat, ", blk");
4216 else
4217 strcat (rat, "blk");
4218 return creat (name, 0, rfm, rat, fsz);
4219
4220 case FAB$C_STM:
4221 strcpy (rfm, "rfm = stm");
4222 break;
4223
4224 case FAB$C_STMCR:
4225 strcpy (rfm, "rfm = stmcr");
4226 break;
4227
4228 case FAB$C_STMLF:
4229 strcpy (rfm, "rfm = stmlf");
4230 break;
4231
4232 case FAB$C_UDF:
4233 strcpy (rfm, "rfm = udf");
4234 break;
4235
4236 case FAB$C_VAR:
4237 strcpy (rfm, "rfm = var");
4238 break;
4239 }
4240 strcpy (rat, "rat = ");
4241 if (st_buf.st_fab_rat & FAB$M_CR)
4242 strcat (rat, "cr");
4243 else if (st_buf.st_fab_rat & FAB$M_FTN)
4244 strcat (rat, "ftn");
4245 else if (st_buf.st_fab_rat & FAB$M_PRN)
4246 strcat (rat, "prn");
4247 if (st_buf.st_fab_rat & FAB$M_BLK)
4248 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4249 strcat (rat, ", blk");
4250 else
4251 strcat (rat, "blk");
4252 }
4253 else
4254 {
4255 strcpy (rfm, vms_stmlf_recfm ? "rfm = stmlf" : "rfm=var");
4256 strcpy (rat, "rat=cr");
4257 }
4258 /* Until the VAX C RTL fixes the many bugs with modes, always use
4259 mode 0 to get the user's default protection. */
4260 fd = creat (name, 0, rfm, rat);
4261 if (fd < 0 && errno == EEXIST)
4262 {
4263 if (unlink (name) < 0)
4264 report_file_error ("delete", build_string (name));
4265 fd = creat (name, 0, rfm, rat);
4266 }
4267 return fd;
4268 }
4269 #endif /* creat */
4270
4271 /* fwrite to stdout is S L O W. Speed it up by using fputc...*/
4272 sys_fwrite (ptr, size, num, fp)
4273 register char * ptr;
4274 FILE * fp;
4275 {
4276 register int tot = num * size;
4277
4278 while (tot--)
4279 fputc (*ptr++, fp);
4280 }
4281
4282 /*
4283 * The VMS C library routine creat actually creates a new version of an
4284 * existing file rather than truncating the old version. There are times
4285 * when this is not the desired behavior, for instance, when writing an
4286 * auto save file (you only want one version), or when you don't have
4287 * write permission in the directory containing the file (but the file
4288 * itself is writable). Hence this routine, which is equivalent to
4289 * "close (creat (fn, 0));" on Unix if fn already exists.
4290 */
4291 int
4292 vms_truncate (fn)
4293 char *fn;
4294 {
4295 struct FAB xfab = cc$rms_fab;
4296 struct RAB xrab = cc$rms_rab;
4297 int status;
4298
4299 xfab.fab$l_fop = FAB$M_TEF; /* free allocated but unused blocks on close */
4300 xfab.fab$b_fac = FAB$M_TRN | FAB$M_GET; /* allow truncate and get access */
4301 xfab.fab$b_shr = FAB$M_NIL; /* allow no sharing - file must be locked */
4302 xfab.fab$l_fna = fn;
4303 xfab.fab$b_fns = strlen (fn);
4304 xfab.fab$l_dna = ";0"; /* default to latest version of the file */
4305 xfab.fab$b_dns = 2;
4306 xrab.rab$l_fab = &xfab;
4307
4308 /* This gibberish opens the file, positions to the first record, and
4309 deletes all records from there until the end of file. */
4310 if ((SYS$OPEN (&xfab) & 01) == 01)
4311 {
4312 if ((SYS$CONNECT (&xrab) & 01) == 01 &&
4313 (SYS$FIND (&xrab) & 01) == 01 &&
4314 (SYS$TRUNCATE (&xrab) & 01) == 01)
4315 status = 0;
4316 else
4317 status = -1;
4318 }
4319 else
4320 status = -1;
4321 SYS$CLOSE (&xfab);
4322 return status;
4323 }
4324
4325 /* Define this symbol to actually read SYSUAF.DAT. This requires either
4326 SYSPRV or a readable SYSUAF.DAT. */
4327
4328 #ifdef READ_SYSUAF
4329 /*
4330 * getuaf.c
4331 *
4332 * Routine to read the VMS User Authorization File and return
4333 * a specific user's record.
4334 */
4335
4336 static struct UAF retuaf;
4337
4338 struct UAF *
4339 get_uaf_name (uname)
4340 char * uname;
4341 {
4342 register status;
4343 struct FAB uaf_fab;
4344 struct RAB uaf_rab;
4345
4346 uaf_fab = cc$rms_fab;
4347 uaf_rab = cc$rms_rab;
4348 /* initialize fab fields */
4349 uaf_fab.fab$l_fna = "SYS$SYSTEM:SYSUAF.DAT";
4350 uaf_fab.fab$b_fns = 21;
4351 uaf_fab.fab$b_fac = FAB$M_GET;
4352 uaf_fab.fab$b_org = FAB$C_IDX;
4353 uaf_fab.fab$b_shr = FAB$M_GET|FAB$M_PUT|FAB$M_UPD|FAB$M_DEL;
4354 /* initialize rab fields */
4355 uaf_rab.rab$l_fab = &uaf_fab;
4356 /* open the User Authorization File */
4357 status = SYS$OPEN (&uaf_fab);
4358 if (!(status&1))
4359 {
4360 errno = EVMSERR;
4361 vaxc$errno = status;
4362 return 0;
4363 }
4364 status = SYS$CONNECT (&uaf_rab);
4365 if (!(status&1))
4366 {
4367 errno = EVMSERR;
4368 vaxc$errno = status;
4369 return 0;
4370 }
4371 /* read the requested record - index is in uname */
4372 uaf_rab.rab$l_kbf = uname;
4373 uaf_rab.rab$b_ksz = strlen (uname);
4374 uaf_rab.rab$b_rac = RAB$C_KEY;
4375 uaf_rab.rab$l_ubf = (char *)&retuaf;
4376 uaf_rab.rab$w_usz = sizeof retuaf;
4377 status = SYS$GET (&uaf_rab);
4378 if (!(status&1))
4379 {
4380 errno = EVMSERR;
4381 vaxc$errno = status;
4382 return 0;
4383 }
4384 /* close the User Authorization File */
4385 status = SYS$DISCONNECT (&uaf_rab);
4386 if (!(status&1))
4387 {
4388 errno = EVMSERR;
4389 vaxc$errno = status;
4390 return 0;
4391 }
4392 status = SYS$CLOSE (&uaf_fab);
4393 if (!(status&1))
4394 {
4395 errno = EVMSERR;
4396 vaxc$errno = status;
4397 return 0;
4398 }
4399 return &retuaf;
4400 }
4401
4402 struct UAF *
4403 get_uaf_uic (uic)
4404 unsigned long uic;
4405 {
4406 register status;
4407 struct FAB uaf_fab;
4408 struct RAB uaf_rab;
4409
4410 uaf_fab = cc$rms_fab;
4411 uaf_rab = cc$rms_rab;
4412 /* initialize fab fields */
4413 uaf_fab.fab$l_fna = "SYS$SYSTEM:SYSUAF.DAT";
4414 uaf_fab.fab$b_fns = 21;
4415 uaf_fab.fab$b_fac = FAB$M_GET;
4416 uaf_fab.fab$b_org = FAB$C_IDX;
4417 uaf_fab.fab$b_shr = FAB$M_GET|FAB$M_PUT|FAB$M_UPD|FAB$M_DEL;
4418 /* initialize rab fields */
4419 uaf_rab.rab$l_fab = &uaf_fab;
4420 /* open the User Authorization File */
4421 status = SYS$OPEN (&uaf_fab);
4422 if (!(status&1))
4423 {
4424 errno = EVMSERR;
4425 vaxc$errno = status;
4426 return 0;
4427 }
4428 status = SYS$CONNECT (&uaf_rab);
4429 if (!(status&1))
4430 {
4431 errno = EVMSERR;
4432 vaxc$errno = status;
4433 return 0;
4434 }
4435 /* read the requested record - index is in uic */
4436 uaf_rab.rab$b_krf = 1; /* 1st alternate key */
4437 uaf_rab.rab$l_kbf = (char *) &uic;
4438 uaf_rab.rab$b_ksz = sizeof uic;
4439 uaf_rab.rab$b_rac = RAB$C_KEY;
4440 uaf_rab.rab$l_ubf = (char *)&retuaf;
4441 uaf_rab.rab$w_usz = sizeof retuaf;
4442 status = SYS$GET (&uaf_rab);
4443 if (!(status&1))
4444 {
4445 errno = EVMSERR;
4446 vaxc$errno = status;
4447 return 0;
4448 }
4449 /* close the User Authorization File */
4450 status = SYS$DISCONNECT (&uaf_rab);
4451 if (!(status&1))
4452 {
4453 errno = EVMSERR;
4454 vaxc$errno = status;
4455 return 0;
4456 }
4457 status = SYS$CLOSE (&uaf_fab);
4458 if (!(status&1))
4459 {
4460 errno = EVMSERR;
4461 vaxc$errno = status;
4462 return 0;
4463 }
4464 return &retuaf;
4465 }
4466
4467 static struct passwd retpw;
4468
4469 struct passwd *
4470 cnv_uaf_pw (up)
4471 struct UAF * up;
4472 {
4473 char * ptr;
4474
4475 /* copy these out first because if the username is 32 chars, the next
4476 section will overwrite the first byte of the UIC */
4477 retpw.pw_uid = up->uaf$w_mem;
4478 retpw.pw_gid = up->uaf$w_grp;
4479
4480 /* I suppose this is not the best sytle, to possibly overwrite one
4481 byte beyond the end of the field, but what the heck... */
4482 ptr = &up->uaf$t_username[UAF$S_USERNAME];
4483 while (ptr[-1] == ' ')
4484 ptr--;
4485 *ptr = '\0';
4486 strcpy (retpw.pw_name, up->uaf$t_username);
4487
4488 /* the rest of these are counted ascii strings */
4489 strncpy (retpw.pw_gecos, &up->uaf$t_owner[1], up->uaf$t_owner[0]);
4490 retpw.pw_gecos[up->uaf$t_owner[0]] = '\0';
4491 strncpy (retpw.pw_dir, &up->uaf$t_defdev[1], up->uaf$t_defdev[0]);
4492 retpw.pw_dir[up->uaf$t_defdev[0]] = '\0';
4493 strncat (retpw.pw_dir, &up->uaf$t_defdir[1], up->uaf$t_defdir[0]);
4494 retpw.pw_dir[up->uaf$t_defdev[0] + up->uaf$t_defdir[0]] = '\0';
4495 strncpy (retpw.pw_shell, &up->uaf$t_defcli[1], up->uaf$t_defcli[0]);
4496 retpw.pw_shell[up->uaf$t_defcli[0]] = '\0';
4497
4498 return &retpw;
4499 }
4500 #else /* not READ_SYSUAF */
4501 static struct passwd retpw;
4502 #endif /* not READ_SYSUAF */
4503
4504 struct passwd *
4505 getpwnam (name)
4506 char * name;
4507 {
4508 #ifdef READ_SYSUAF
4509 struct UAF *up;
4510 #else
4511 char * user;
4512 char * dir;
4513 unsigned char * full;
4514 #endif /* READ_SYSUAF */
4515 char *ptr = name;
4516
4517 while (*ptr)
4518 {
4519 if ('a' <= *ptr && *ptr <= 'z')
4520 *ptr -= 040;
4521 ptr++;
4522 }
4523 #ifdef READ_SYSUAF
4524 if (!(up = get_uaf_name (name)))
4525 return 0;
4526 return cnv_uaf_pw (up);
4527 #else
4528 if (strcmp (name, getenv ("USER")) == 0)
4529 {
4530 retpw.pw_uid = getuid ();
4531 retpw.pw_gid = getgid ();
4532 strcpy (retpw.pw_name, name);
4533 if (full = egetenv ("FULLNAME"))
4534 strcpy (retpw.pw_gecos, full);
4535 else
4536 *retpw.pw_gecos = '\0';
4537 strcpy (retpw.pw_dir, egetenv ("HOME"));
4538 *retpw.pw_shell = '\0';
4539 return &retpw;
4540 }
4541 else
4542 return 0;
4543 #endif /* not READ_SYSUAF */
4544 }
4545
4546 struct passwd *
4547 getpwuid (uid)
4548 unsigned long uid;
4549 {
4550 #ifdef READ_SYSUAF
4551 struct UAF * up;
4552
4553 if (!(up = get_uaf_uic (uid)))
4554 return 0;
4555 return cnv_uaf_pw (up);
4556 #else
4557 if (uid == sys_getuid ())
4558 return getpwnam (egetenv ("USER"));
4559 else
4560 return 0;
4561 #endif /* not READ_SYSUAF */
4562 }
4563
4564 /* return total address space available to the current process. This is
4565 the sum of the current p0 size, p1 size and free page table entries
4566 available. */
4567 vlimit ()
4568 {
4569 int item_code;
4570 unsigned long free_pages;
4571 unsigned long frep0va;
4572 unsigned long frep1va;
4573 register status;
4574
4575 item_code = JPI$_FREPTECNT;
4576 if (((status = LIB$GETJPI (&item_code, 0, 0, &free_pages)) & 1) == 0)
4577 {
4578 errno = EVMSERR;
4579 vaxc$errno = status;
4580 return -1;
4581 }
4582 free_pages *= 512;
4583
4584 item_code = JPI$_FREP0VA;
4585 if (((status = LIB$GETJPI (&item_code, 0, 0, &frep0va)) & 1) == 0)
4586 {
4587 errno = EVMSERR;
4588 vaxc$errno = status;
4589 return -1;
4590 }
4591 item_code = JPI$_FREP1VA;
4592 if (((status = LIB$GETJPI (&item_code, 0, 0, &frep1va)) & 1) == 0)
4593 {
4594 errno = EVMSERR;
4595 vaxc$errno = status;
4596 return -1;
4597 }
4598
4599 return free_pages + frep0va + (0x7fffffff - frep1va);
4600 }
4601
4602 define_logical_name (varname, string)
4603 char *varname;
4604 char *string;
4605 {
4606 struct dsc$descriptor_s strdsc =
4607 {strlen (string), DSC$K_DTYPE_T, DSC$K_CLASS_S, string};
4608 struct dsc$descriptor_s envdsc =
4609 {strlen (varname), DSC$K_DTYPE_T, DSC$K_CLASS_S, varname};
4610 struct dsc$descriptor_s lnmdsc =
4611 {7, DSC$K_DTYPE_T, DSC$K_CLASS_S, "LNM$JOB"};
4612
4613 return LIB$SET_LOGICAL (&envdsc, &strdsc, &lnmdsc, 0, 0);
4614 }
4615
4616 delete_logical_name (varname)
4617 char *varname;
4618 {
4619 struct dsc$descriptor_s envdsc =
4620 {strlen (varname), DSC$K_DTYPE_T, DSC$K_CLASS_S, varname};
4621 struct dsc$descriptor_s lnmdsc =
4622 {7, DSC$K_DTYPE_T, DSC$K_CLASS_S, "LNM$JOB"};
4623
4624 return LIB$DELETE_LOGICAL (&envdsc, &lnmdsc);
4625 }
4626
4627 ulimit ()
4628 {}
4629
4630 setpgrp ()
4631 {}
4632
4633 execvp ()
4634 {
4635 error ("execvp system call not implemented");
4636 }
4637
4638 int
4639 rename (from, to)
4640 char *from, *to;
4641 {
4642 int status;
4643 struct FAB from_fab = cc$rms_fab, to_fab = cc$rms_fab;
4644 struct NAM from_nam = cc$rms_nam, to_nam = cc$rms_nam;
4645 char from_esn[NAM$C_MAXRSS];
4646 char to_esn[NAM$C_MAXRSS];
4647
4648 from_fab.fab$l_fna = from;
4649 from_fab.fab$b_fns = strlen (from);
4650 from_fab.fab$l_nam = &from_nam;
4651 from_fab.fab$l_fop = FAB$M_NAM;
4652
4653 from_nam.nam$l_esa = from_esn;
4654 from_nam.nam$b_ess = sizeof from_esn;
4655
4656 to_fab.fab$l_fna = to;
4657 to_fab.fab$b_fns = strlen (to);
4658 to_fab.fab$l_nam = &to_nam;
4659 to_fab.fab$l_fop = FAB$M_NAM;
4660
4661 to_nam.nam$l_esa = to_esn;
4662 to_nam.nam$b_ess = sizeof to_esn;
4663
4664 status = SYS$RENAME (&from_fab, 0, 0, &to_fab);
4665
4666 if (status & 1)
4667 return 0;
4668 else
4669 {
4670 if (status == RMS$_DEV)
4671 errno = EXDEV;
4672 else
4673 errno = EVMSERR;
4674 vaxc$errno = status;
4675 return -1;
4676 }
4677 }
4678
4679 /* This function renames a file like `rename', but it strips
4680 the version number from the "to" filename, such that the "to" file is
4681 will always be a new version. It also sets the file protection once it is
4682 finished. The protection that we will use is stored in fab_final_pro,
4683 and was set when we did a creat_copy_attrs to create the file that we
4684 are renaming.
4685
4686 We could use the chmod function, but Eunichs uses 3 bits per user category
4687 to describe the protection, and VMS uses 4 (write and delete are separate
4688 bits). To maintain portability, the VMS implementation of `chmod' wires
4689 the W and D bits together. */
4690
4691
4692 static struct fibdef fib; /* We need this initialized to zero */
4693 char vms_file_written[NAM$C_MAXRSS];
4694
4695 int
4696 rename_sans_version (from,to)
4697 char *from, *to;
4698 {
4699 short int chan;
4700 int stat;
4701 short int iosb[4];
4702 int status;
4703 struct FAB to_fab = cc$rms_fab;
4704 struct NAM to_nam = cc$rms_nam;
4705 struct dsc$descriptor fib_d ={sizeof (fib),0,0,(char*) &fib};
4706 struct dsc$descriptor fib_attr[2]
4707 = {{sizeof (fab_final_pro),ATR$C_FPRO,0,(char*) &fab_final_pro},{0,0,0,0}};
4708 char to_esn[NAM$C_MAXRSS];
4709
4710 $DESCRIPTOR (disk,to_esn);
4711
4712 to_fab.fab$l_fna = to;
4713 to_fab.fab$b_fns = strlen (to);
4714 to_fab.fab$l_nam = &to_nam;
4715 to_fab.fab$l_fop = FAB$M_NAM;
4716
4717 to_nam.nam$l_esa = to_esn;
4718 to_nam.nam$b_ess = sizeof to_esn;
4719
4720 status = SYS$PARSE (&to_fab, 0, 0); /* figure out the full file name */
4721
4722 if (to_nam.nam$l_fnb && NAM$M_EXP_VER)
4723 *(to_nam.nam$l_ver) = '\0';
4724
4725 stat = rename (from, to_esn);
4726 if (stat < 0)
4727 return stat;
4728
4729 strcpy (vms_file_written, to_esn);
4730
4731 to_fab.fab$l_fna = vms_file_written; /* this points to the versionless name */
4732 to_fab.fab$b_fns = strlen (vms_file_written);
4733
4734 /* Now set the file protection to the correct value */
4735 SYS$OPEN (&to_fab, 0, 0); /* This fills in the nam$w_fid fields */
4736
4737 /* Copy these fields into the fib */
4738 fib.fib$r_fid_overlay.fib$w_fid[0] = to_nam.nam$w_fid[0];
4739 fib.fib$r_fid_overlay.fib$w_fid[1] = to_nam.nam$w_fid[1];
4740 fib.fib$r_fid_overlay.fib$w_fid[2] = to_nam.nam$w_fid[2];
4741
4742 SYS$CLOSE (&to_fab, 0, 0);
4743
4744 stat = SYS$ASSIGN (&disk, &chan, 0, 0); /* open a channel to the disk */
4745 if (!stat)
4746 LIB$SIGNAL (stat);
4747 stat = SYS$QIOW (0, chan, IO$_MODIFY, iosb, 0, 0, &fib_d,
4748 0, 0, 0, &fib_attr, 0);
4749 if (!stat)
4750 LIB$SIGNAL (stat);
4751 stat = SYS$DASSGN (chan);
4752 if (!stat)
4753 LIB$SIGNAL (stat);
4754 strcpy (vms_file_written, to_esn); /* We will write this to the terminal*/
4755 return 0;
4756 }
4757
4758 link (file, new)
4759 char * file, * new;
4760 {
4761 register status;
4762 struct FAB fab;
4763 struct NAM nam;
4764 unsigned short fid[3];
4765 char esa[NAM$C_MAXRSS];
4766
4767 fab = cc$rms_fab;
4768 fab.fab$l_fop = FAB$M_OFP;
4769 fab.fab$l_fna = file;
4770 fab.fab$b_fns = strlen (file);
4771 fab.fab$l_nam = &nam;
4772
4773 nam = cc$rms_nam;
4774 nam.nam$l_esa = esa;
4775 nam.nam$b_ess = NAM$C_MAXRSS;
4776
4777 status = SYS$PARSE (&fab);
4778 if ((status & 1) == 0)
4779 {
4780 errno = EVMSERR;
4781 vaxc$errno = status;
4782 return -1;
4783 }
4784 status = SYS$SEARCH (&fab);
4785 if ((status & 1) == 0)
4786 {
4787 errno = EVMSERR;
4788 vaxc$errno = status;
4789 return -1;
4790 }
4791
4792 fid[0] = nam.nam$w_fid[0];
4793 fid[1] = nam.nam$w_fid[1];
4794 fid[2] = nam.nam$w_fid[2];
4795
4796 fab.fab$l_fna = new;
4797 fab.fab$b_fns = strlen (new);
4798
4799 status = SYS$PARSE (&fab);
4800 if ((status & 1) == 0)
4801 {
4802 errno = EVMSERR;
4803 vaxc$errno = status;
4804 return -1;
4805 }
4806
4807 nam.nam$w_fid[0] = fid[0];
4808 nam.nam$w_fid[1] = fid[1];
4809 nam.nam$w_fid[2] = fid[2];
4810
4811 nam.nam$l_esa = nam.nam$l_name;
4812 nam.nam$b_esl = nam.nam$b_name + nam.nam$b_type + nam.nam$b_ver;
4813
4814 status = SYS$ENTER (&fab);
4815 if ((status & 1) == 0)
4816 {
4817 errno = EVMSERR;
4818 vaxc$errno = status;
4819 return -1;
4820 }
4821
4822 return 0;
4823 }
4824
4825 croak (badfunc)
4826 char *badfunc;
4827 {
4828 printf ("%s not yet implemented\r\n", badfunc);
4829 reset_sys_modes ();
4830 exit (1);
4831 }
4832
4833 long
4834 random ()
4835 {
4836 /* Arrange to return a range centered on zero. */
4837 return rand () - (1 << 30);
4838 }
4839
4840 srandom (seed)
4841 {
4842 srand (seed);
4843 }
4844 #endif /* VMS */
4845 \f
4846 #ifdef AIXHFT
4847
4848 /* Called from init_sys_modes. */
4849 hft_init ()
4850 {
4851 int junk;
4852
4853 /* If we're not on an HFT we shouldn't do any of this. We determine
4854 if we are on an HFT by trying to get an HFT error code. If this
4855 call fails, we're not on an HFT. */
4856 #ifdef IBMR2AIX
4857 if (ioctl (0, HFQERROR, &junk) < 0)
4858 return;
4859 #else /* not IBMR2AIX */
4860 if (ioctl (0, HFQEIO, 0) < 0)
4861 return;
4862 #endif /* not IBMR2AIX */
4863
4864 /* On AIX the default hft keyboard mapping uses backspace rather than delete
4865 as the rubout key's ASCII code. Here this is changed. The bug is that
4866 there's no way to determine the old mapping, so in reset_sys_modes
4867 we need to assume that the normal map had been present. Of course, this
4868 code also doesn't help if on a terminal emulator which doesn't understand
4869 HFT VTD's. */
4870 {
4871 struct hfbuf buf;
4872 struct hfkeymap keymap;
4873
4874 buf.hf_bufp = (char *)&keymap;
4875 buf.hf_buflen = sizeof (keymap);
4876 keymap.hf_nkeys = 2;
4877 keymap.hfkey[0].hf_kpos = 15;
4878 keymap.hfkey[0].hf_kstate = HFMAPCHAR | HFSHFNONE;
4879 #ifdef IBMR2AIX
4880 keymap.hfkey[0].hf_keyidh = '<';
4881 #else /* not IBMR2AIX */
4882 keymap.hfkey[0].hf_page = '<';
4883 #endif /* not IBMR2AIX */
4884 keymap.hfkey[0].hf_char = 127;
4885 keymap.hfkey[1].hf_kpos = 15;
4886 keymap.hfkey[1].hf_kstate = HFMAPCHAR | HFSHFSHFT;
4887 #ifdef IBMR2AIX
4888 keymap.hfkey[1].hf_keyidh = '<';
4889 #else /* not IBMR2AIX */
4890 keymap.hfkey[1].hf_page = '<';
4891 #endif /* not IBMR2AIX */
4892 keymap.hfkey[1].hf_char = 127;
4893 hftctl (0, HFSKBD, &buf);
4894 }
4895 /* The HFT system on AIX doesn't optimize for scrolling, so it's really ugly
4896 at times. */
4897 line_ins_del_ok = char_ins_del_ok = 0;
4898 }
4899
4900 /* Reset the rubout key to backspace. */
4901
4902 hft_reset ()
4903 {
4904 struct hfbuf buf;
4905 struct hfkeymap keymap;
4906 int junk;
4907
4908 #ifdef IBMR2AIX
4909 if (ioctl (0, HFQERROR, &junk) < 0)
4910 return;
4911 #else /* not IBMR2AIX */
4912 if (ioctl (0, HFQEIO, 0) < 0)
4913 return;
4914 #endif /* not IBMR2AIX */
4915
4916 buf.hf_bufp = (char *)&keymap;
4917 buf.hf_buflen = sizeof (keymap);
4918 keymap.hf_nkeys = 2;
4919 keymap.hfkey[0].hf_kpos = 15;
4920 keymap.hfkey[0].hf_kstate = HFMAPCHAR | HFSHFNONE;
4921 #ifdef IBMR2AIX
4922 keymap.hfkey[0].hf_keyidh = '<';
4923 #else /* not IBMR2AIX */
4924 keymap.hfkey[0].hf_page = '<';
4925 #endif /* not IBMR2AIX */
4926 keymap.hfkey[0].hf_char = 8;
4927 keymap.hfkey[1].hf_kpos = 15;
4928 keymap.hfkey[1].hf_kstate = HFMAPCHAR | HFSHFSHFT;
4929 #ifdef IBMR2AIX
4930 keymap.hfkey[1].hf_keyidh = '<';
4931 #else /* not IBMR2AIX */
4932 keymap.hfkey[1].hf_page = '<';
4933 #endif /* not IBMR2AIX */
4934 keymap.hfkey[1].hf_char = 8;
4935 hftctl (0, HFSKBD, &buf);
4936 }
4937
4938 #endif /* AIXHFT */
4939
4940 #ifdef USE_DL_STUBS
4941
4942 /* These are included on Sunos 4.1 when we do not use shared libraries.
4943 X11 libraries may refer to these functions but (we hope) do not
4944 actually call them. */
4945
4946 void *
4947 dlopen ()
4948 {
4949 return 0;
4950 }
4951
4952 void *
4953 dlsym ()
4954 {
4955 return 0;
4956 }
4957
4958 int
4959 dlclose ()
4960 {
4961 return -1;
4962 }
4963
4964 #endif /* USE_DL_STUBS */
4965 \f
4966 #ifndef BSTRING
4967
4968 #ifndef bzero
4969
4970 void
4971 bzero (b, length)
4972 register char *b;
4973 register int length;
4974 {
4975 #ifdef VMS
4976 short zero = 0;
4977 long max_str = 65535;
4978
4979 while (length > max_str) {
4980 (void) LIB$MOVC5 (&zero, &zero, &zero, &max_str, b);
4981 length -= max_str;
4982 b += max_str;
4983 }
4984 max_str = length;
4985 (void) LIB$MOVC5 (&zero, &zero, &zero, &max_str, b);
4986 #else
4987 while (length-- > 0)
4988 *b++ = 0;
4989 #endif /* not VMS */
4990 }
4991
4992 #endif /* no bzero */
4993 #endif /* BSTRING */
4994
4995 #if (defined (BSTRING) && !defined (bcopy)) || defined (NEED_BCOPY)
4996 #undef bcopy
4997
4998 /* Saying `void' requires a declaration, above, where bcopy is used
4999 and that declaration causes pain for systems where bcopy is a macro. */
5000 bcopy (b1, b2, length)
5001 register char *b1;
5002 register char *b2;
5003 register int length;
5004 {
5005 #ifdef VMS
5006 long max_str = 65535;
5007
5008 while (length > max_str) {
5009 (void) LIB$MOVC3 (&max_str, b1, b2);
5010 length -= max_str;
5011 b1 += max_str;
5012 b2 += max_str;
5013 }
5014 max_str = length;
5015 (void) LIB$MOVC3 (&length, b1, b2);
5016 #else
5017 while (length-- > 0)
5018 *b2++ = *b1++;
5019 #endif /* not VMS */
5020 }
5021 #endif /* (defined (BSTRING) && !defined (bcopy)) || defined (NEED_BCOPY) */
5022
5023 #ifdef BSTRING
5024 #ifndef bcmp
5025 int
5026 bcmp (b1, b2, length) /* This could be a macro! */
5027 register char *b1;
5028 register char *b2;
5029 register int length;
5030 {
5031 #ifdef VMS
5032 struct dsc$descriptor_s src1 = {length, DSC$K_DTYPE_T, DSC$K_CLASS_S, b1};
5033 struct dsc$descriptor_s src2 = {length, DSC$K_DTYPE_T, DSC$K_CLASS_S, b2};
5034
5035 return STR$COMPARE (&src1, &src2);
5036 #else
5037 while (length-- > 0)
5038 if (*b1++ != *b2++)
5039 return 1;
5040
5041 return 0;
5042 #endif /* not VMS */
5043 }
5044 #endif /* no bcmp */
5045 #endif /* not BSTRING */