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(SWITCH_ENUM_CAST): New macro.
[bpt/emacs.git] / src / sysdep.c
1 /* Interfaces to system-dependent kernel and library entries.
2 Copyright (C) 1985, 86, 87, 88, 93, 94 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 if (!flow_control) tcflow (input_fd, TCOON);
1392 #endif
1393
1394 #ifdef AIXHFT
1395 hft_init ();
1396 #ifdef IBMR2AIX
1397 {
1398 /* IBM's HFT device usually thinks a ^J should be LF/CR. We need it
1399 to be only LF. This is the way that is done. */
1400 struct termio tty;
1401
1402 if (ioctl (1, HFTGETID, &tty) != -1)
1403 write (1, "\033[20l", 5);
1404 }
1405 #endif
1406 #endif /* AIXHFT */
1407
1408 #ifdef VMS
1409 /* Appears to do nothing when in PASTHRU mode.
1410 SYS$QIOW (0, input_fd, IO$_SETMODE|IO$M_OUTBAND, 0, 0, 0,
1411 interrupt_signal, oob_chars, 0, 0, 0, 0);
1412 */
1413 queue_kbd_input (0);
1414 #endif /* VMS */
1415 }
1416
1417 #ifdef F_SETFL
1418 #ifndef F_SETOWN_BUG
1419 #ifdef F_GETOWN /* F_SETFL does not imply existence of F_GETOWN */
1420 if (interrupt_input
1421 && ! read_socket_hook && EQ (Vwindow_system, Qnil))
1422 {
1423 old_fcntl_owner = fcntl (input_fd, F_GETOWN, 0);
1424 fcntl (input_fd, F_SETOWN, getpid ());
1425 init_sigio (input_fd);
1426 }
1427 #endif /* F_GETOWN */
1428 #endif /* F_SETOWN_BUG */
1429 #endif /* F_SETFL */
1430
1431 #ifdef BSD4_1
1432 if (interrupt_input)
1433 init_sigio (input_fd);
1434 #endif
1435
1436 #ifdef VMS /* VMS sometimes has this symbol but lacks setvbuf. */
1437 #undef _IOFBF
1438 #endif
1439 #ifdef _IOFBF
1440 /* This symbol is defined on recent USG systems.
1441 Someone says without this call USG won't really buffer the file
1442 even with a call to setbuf. */
1443 setvbuf (stdout, _sobuf, _IOFBF, sizeof _sobuf);
1444 #else
1445 setbuf (stdout, _sobuf);
1446 #endif
1447 if (! read_socket_hook && EQ (Vwindow_system, Qnil))
1448 set_terminal_modes ();
1449
1450 if (term_initted && no_redraw_on_reenter)
1451 {
1452 if (display_completed)
1453 direct_output_forward_char (0);
1454 }
1455 else
1456 {
1457 frame_garbaged = 1;
1458 #ifdef MULTI_FRAME
1459 if (FRAMEP (Vterminal_frame))
1460 FRAME_GARBAGED_P (XFRAME (Vterminal_frame)) = 1;
1461 #endif
1462 }
1463
1464 term_initted = 1;
1465 }
1466
1467 /* Return nonzero if safe to use tabs in output.
1468 At the time this is called, init_sys_modes has not been done yet. */
1469
1470 tabs_safe_p ()
1471 {
1472 struct emacs_tty tty;
1473
1474 EMACS_GET_TTY (input_fd, &tty);
1475 return EMACS_TTY_TABS_OK (&tty);
1476 }
1477 \f
1478 /* Get terminal size from system.
1479 Store number of lines into *HEIGHTP and width into *WIDTHP.
1480 We store 0 if there's no valid information. */
1481
1482 get_frame_size (widthp, heightp)
1483 int *widthp, *heightp;
1484 {
1485
1486 #ifdef TIOCGWINSZ
1487
1488 /* BSD-style. */
1489 struct winsize size;
1490
1491 if (ioctl (input_fd, TIOCGWINSZ, &size) == -1)
1492 *widthp = *heightp = 0;
1493 else
1494 {
1495 *widthp = size.ws_col;
1496 *heightp = size.ws_row;
1497 }
1498
1499 #else
1500 #ifdef TIOCGSIZE
1501
1502 /* SunOS - style. */
1503 struct ttysize size;
1504
1505 if (ioctl (input_fd, TIOCGSIZE, &size) == -1)
1506 *widthp = *heightp = 0;
1507 else
1508 {
1509 *widthp = size.ts_cols;
1510 *heightp = size.ts_lines;
1511 }
1512
1513 #else
1514 #ifdef VMS
1515
1516 struct sensemode tty;
1517
1518 SYS$QIOW (0, input_fd, IO$_SENSEMODE, &tty, 0, 0,
1519 &tty.class, 12, 0, 0, 0, 0);
1520 *widthp = tty.scr_wid;
1521 *heightp = tty.scr_len;
1522
1523 #else
1524 #ifdef MSDOS
1525 *widthp = ScreenCols ();
1526 *heightp = ScreenRows ();
1527 #else /* system doesn't know size */
1528 *widthp = 0;
1529 *heightp = 0;
1530 #endif
1531
1532 #endif /* not VMS */
1533 #endif /* not SunOS-style */
1534 #endif /* not BSD-style */
1535 }
1536
1537 /* Set the logical window size associated with descriptor FD
1538 to HEIGHT and WIDTH. This is used mainly with ptys. */
1539
1540 int
1541 set_window_size (fd, height, width)
1542 int fd, height, width;
1543 {
1544 #ifdef TIOCSWINSZ
1545
1546 /* BSD-style. */
1547 struct winsize size;
1548 size.ws_row = height;
1549 size.ws_col = width;
1550
1551 if (ioctl (fd, TIOCSWINSZ, &size) == -1)
1552 return 0; /* error */
1553 else
1554 return 1;
1555
1556 #else
1557 #ifdef TIOCSSIZE
1558
1559 /* SunOS - style. */
1560 struct ttysize size;
1561 size.ts_lines = height;
1562 size.ts_cols = width;
1563
1564 if (ioctl (fd, TIOCGSIZE, &size) == -1)
1565 return 0;
1566 else
1567 return 1;
1568 #else
1569 return -1;
1570 #endif /* not SunOS-style */
1571 #endif /* not BSD-style */
1572 }
1573
1574 \f
1575 /* Prepare the terminal for exiting Emacs; move the cursor to the
1576 bottom of the frame, turn off interrupt-driven I/O, etc. */
1577 reset_sys_modes ()
1578 {
1579 if (noninteractive)
1580 {
1581 fflush (stdout);
1582 return;
1583 }
1584 if (!term_initted)
1585 return;
1586 #ifdef HAVE_X_WINDOWS
1587 /* Emacs' window system on MSDOG uses the `internal terminal' and therefore
1588 needs the clean-up code below. */
1589 if (read_socket_hook || !EQ (Vwindow_system, Qnil))
1590 return;
1591 #endif
1592 cursor_to (FRAME_HEIGHT (selected_frame) - 1, 0);
1593 #ifdef MSDOS
1594 if (!EQ (Vwindow_system, Qnil))
1595 {
1596 /* Change to grey on white. */
1597 putchar ('\e');
1598 putchar ('A');
1599 putchar (7);
1600 }
1601 #endif
1602 clear_end_of_line (FRAME_WIDTH (selected_frame));
1603 /* clear_end_of_line may move the cursor */
1604 cursor_to (FRAME_HEIGHT (selected_frame) - 1, 0);
1605 #if defined (IBMR2AIX) && defined (AIXHFT)
1606 {
1607 /* HFT devices normally use ^J as a LF/CR. We forced it to
1608 do the LF only. Now, we need to reset it. */
1609 struct termio tty;
1610
1611 if (ioctl (1, HFTGETID, &tty) != -1)
1612 write (1, "\033[20h", 5);
1613 }
1614 #endif
1615
1616 reset_terminal_modes ();
1617 fflush (stdout);
1618 #ifdef BSD
1619 #ifndef BSD4_1
1620 /* Avoid possible loss of output when changing terminal modes. */
1621 fsync (fileno (stdout));
1622 #endif
1623 #endif
1624
1625 #ifdef F_SETFL
1626 #ifndef F_SETOWN_BUG
1627 #ifdef F_SETOWN /* F_SETFL does not imply existence of F_SETOWN */
1628 if (interrupt_input)
1629 {
1630 reset_sigio ();
1631 fcntl (input_fd, F_SETOWN, old_fcntl_owner);
1632 }
1633 #endif /* F_SETOWN */
1634 #endif /* F_SETOWN_BUG */
1635 #ifdef O_NDELAY
1636 fcntl (input_fd, F_SETFL, fcntl (input_fd, F_GETFL, 0) & ~O_NDELAY);
1637 #endif
1638 #endif /* F_SETFL */
1639 #ifdef BSD4_1
1640 if (interrupt_input)
1641 reset_sigio ();
1642 #endif /* BSD4_1 */
1643
1644 while (EMACS_SET_TTY (input_fd, &old_tty, 0) < 0 && errno == EINTR)
1645 ;
1646
1647 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */
1648 dos_ttcooked ();
1649 #endif
1650
1651 #ifdef SET_LINE_DISCIPLINE
1652 /* Ultrix's termios *ignores* any line discipline except TERMIODISC.
1653 A different old line discipline is therefore not restored, yet.
1654 Restore the old line discipline by hand. */
1655 ioctl (0, TIOCSETD, &old_tty.main.c_line);
1656 #endif
1657
1658 #ifdef AIXHFT
1659 hft_reset ();
1660 #endif
1661
1662 #ifdef BSD_PGRPS
1663 widen_foreground_group ();
1664 #endif
1665 }
1666 \f
1667 #ifdef HAVE_PTYS
1668
1669 /* Set up the proper status flags for use of a pty. */
1670
1671 setup_pty (fd)
1672 int fd;
1673 {
1674 /* I'm told that TOICREMOTE does not mean control chars
1675 "can't be sent" but rather that they don't have
1676 input-editing or signaling effects.
1677 That should be good, because we have other ways
1678 to do those things in Emacs.
1679 However, telnet mode seems not to work on 4.2.
1680 So TIOCREMOTE is turned off now. */
1681
1682 /* Under hp-ux, if TIOCREMOTE is turned on, some calls
1683 will hang. In particular, the "timeout" feature (which
1684 causes a read to return if there is no data available)
1685 does this. Also it is known that telnet mode will hang
1686 in such a way that Emacs must be stopped (perhaps this
1687 is the same problem).
1688
1689 If TIOCREMOTE is turned off, then there is a bug in
1690 hp-ux which sometimes loses data. Apparently the
1691 code which blocks the master process when the internal
1692 buffer fills up does not work. Other than this,
1693 though, everything else seems to work fine.
1694
1695 Since the latter lossage is more benign, we may as well
1696 lose that way. -- cph */
1697 #ifdef FIONBIO
1698 #ifdef SYSV_PTYS
1699 {
1700 int on = 1;
1701 ioctl (fd, FIONBIO, &on);
1702 }
1703 #endif
1704 #endif
1705 #ifdef IBMRTAIX
1706 /* On AIX, the parent gets SIGHUP when a pty attached child dies. So, we */
1707 /* ignore SIGHUP once we've started a child on a pty. Note that this may */
1708 /* cause EMACS not to die when it should, i.e., when its own controlling */
1709 /* tty goes away. I've complained to the AIX developers, and they may */
1710 /* change this behavior, but I'm not going to hold my breath. */
1711 signal (SIGHUP, SIG_IGN);
1712 #endif
1713 }
1714 #endif /* HAVE_PTYS */
1715 \f
1716 #ifdef VMS
1717
1718 /* Assigning an input channel is done at the start of Emacs execution.
1719 This is called each time Emacs is resumed, also, but does nothing
1720 because input_chain is no longer zero. */
1721
1722 init_vms_input ()
1723 {
1724 int status;
1725
1726 if (input_fd == 0)
1727 {
1728 status = SYS$ASSIGN (&input_dsc, &input_fd, 0, 0);
1729 if (! (status & 1))
1730 LIB$STOP (status);
1731 }
1732 }
1733
1734 /* Deassigning the input channel is done before exiting. */
1735
1736 stop_vms_input ()
1737 {
1738 return SYS$DASSGN (input_fd);
1739 }
1740
1741 short input_buffer;
1742
1743 /* Request reading one character into the keyboard buffer.
1744 This is done as soon as the buffer becomes empty. */
1745
1746 queue_kbd_input ()
1747 {
1748 int status;
1749 extern kbd_input_ast ();
1750
1751 waiting_for_ast = 0;
1752 stop_input = 0;
1753 status = SYS$QIO (0, input_fd, IO$_READVBLK,
1754 &input_iosb, kbd_input_ast, 1,
1755 &input_buffer, 1, 0, terminator_mask, 0, 0);
1756 }
1757
1758 int input_count;
1759
1760 /* Ast routine that is called when keyboard input comes in
1761 in accord with the SYS$QIO above. */
1762
1763 kbd_input_ast ()
1764 {
1765 register int c = -1;
1766 int old_errno = errno;
1767 extern EMACS_TIME *input_available_clear_time;
1768
1769 if (waiting_for_ast)
1770 SYS$SETEF (input_ef);
1771 waiting_for_ast = 0;
1772 input_count++;
1773 #ifdef ASTDEBUG
1774 if (input_count == 25)
1775 exit (1);
1776 printf ("Ast # %d,", input_count);
1777 printf (" iosb = %x, %x, %x, %x",
1778 input_iosb.offset, input_iosb.status, input_iosb.termlen,
1779 input_iosb.term);
1780 #endif
1781 if (input_iosb.offset)
1782 {
1783 c = input_buffer;
1784 #ifdef ASTDEBUG
1785 printf (", char = 0%o", c);
1786 #endif
1787 }
1788 #ifdef ASTDEBUG
1789 printf ("\n");
1790 fflush (stdout);
1791 sleep (1);
1792 #endif
1793 if (! stop_input)
1794 queue_kbd_input ();
1795 if (c >= 0)
1796 {
1797 struct input_event e;
1798 e.kind = ascii_keystroke;
1799 XSETINT (e.code, c);
1800 XSETFRAME (e.frame_or_window, selected_frame);
1801 kbd_buffer_store_event (&e);
1802 }
1803 if (input_available_clear_time)
1804 EMACS_SET_SECS_USECS (*input_available_clear_time, 0, 0);
1805 errno = old_errno;
1806 }
1807
1808 /* Wait until there is something in kbd_buffer. */
1809
1810 wait_for_kbd_input ()
1811 {
1812 extern int have_process_input, process_exited;
1813
1814 /* If already something, avoid doing system calls. */
1815 if (detect_input_pending ())
1816 {
1817 return;
1818 }
1819 /* Clear a flag, and tell ast routine above to set it. */
1820 SYS$CLREF (input_ef);
1821 waiting_for_ast = 1;
1822 /* Check for timing error: ast happened while we were doing that. */
1823 if (!detect_input_pending ())
1824 {
1825 /* No timing error: wait for flag to be set. */
1826 set_waiting_for_input (0);
1827 SYS$WFLOR (input_ef, input_eflist);
1828 clear_waiting_for_input (0);
1829 if (!detect_input_pending ())
1830 /* Check for subprocess input availability */
1831 {
1832 int dsp = have_process_input || process_exited;
1833
1834 SYS$CLREF (process_ef);
1835 if (have_process_input)
1836 process_command_input ();
1837 if (process_exited)
1838 process_exit ();
1839 if (dsp)
1840 {
1841 update_mode_lines++;
1842 prepare_menu_bars ();
1843 redisplay_preserve_echo_area ();
1844 }
1845 }
1846 }
1847 waiting_for_ast = 0;
1848 }
1849
1850 /* Get rid of any pending QIO, when we are about to suspend
1851 or when we want to throw away pending input.
1852 We wait for a positive sign that the AST routine has run
1853 and therefore there is no I/O request queued when we return.
1854 SYS$SETAST is used to avoid a timing error. */
1855
1856 end_kbd_input ()
1857 {
1858 #ifdef ASTDEBUG
1859 printf ("At end_kbd_input.\n");
1860 fflush (stdout);
1861 sleep (1);
1862 #endif
1863 if (LIB$AST_IN_PROG ()) /* Don't wait if suspending from kbd_buffer_store_event! */
1864 {
1865 SYS$CANCEL (input_fd);
1866 return;
1867 }
1868
1869 SYS$SETAST (0);
1870 /* Clear a flag, and tell ast routine above to set it. */
1871 SYS$CLREF (input_ef);
1872 waiting_for_ast = 1;
1873 stop_input = 1;
1874 SYS$CANCEL (input_fd);
1875 SYS$SETAST (1);
1876 SYS$WAITFR (input_ef);
1877 waiting_for_ast = 0;
1878 }
1879
1880 /* Wait for either input available or time interval expiry. */
1881
1882 input_wait_timeout (timeval)
1883 int timeval; /* Time to wait, in seconds */
1884 {
1885 int time [2];
1886 static int zero = 0;
1887 static int large = -10000000;
1888
1889 LIB$EMUL (&timeval, &large, &zero, time); /* Convert to VMS format */
1890
1891 /* If already something, avoid doing system calls. */
1892 if (detect_input_pending ())
1893 {
1894 return;
1895 }
1896 /* Clear a flag, and tell ast routine above to set it. */
1897 SYS$CLREF (input_ef);
1898 waiting_for_ast = 1;
1899 /* Check for timing error: ast happened while we were doing that. */
1900 if (!detect_input_pending ())
1901 {
1902 /* No timing error: wait for flag to be set. */
1903 SYS$CANTIM (1, 0);
1904 if (SYS$SETIMR (timer_ef, time, 0, 1) & 1) /* Set timer */
1905 SYS$WFLOR (timer_ef, timer_eflist); /* Wait for timer expiry or input */
1906 }
1907 waiting_for_ast = 0;
1908 }
1909
1910 /* The standard `sleep' routine works some other way
1911 and it stops working if you have ever quit out of it.
1912 This one continues to work. */
1913
1914 sys_sleep (timeval)
1915 int timeval;
1916 {
1917 int time [2];
1918 static int zero = 0;
1919 static int large = -10000000;
1920
1921 LIB$EMUL (&timeval, &large, &zero, time); /* Convert to VMS format */
1922
1923 SYS$CANTIM (1, 0);
1924 if (SYS$SETIMR (timer_ef, time, 0, 1) & 1) /* Set timer */
1925 SYS$WAITFR (timer_ef); /* Wait for timer expiry only */
1926 }
1927
1928 init_sigio (fd)
1929 int fd;
1930 {
1931 request_sigio ();
1932 }
1933
1934 reset_sigio ()
1935 {
1936 unrequest_sigio ();
1937 }
1938
1939 request_sigio ()
1940 {
1941 croak ("request sigio");
1942 }
1943
1944 unrequest_sigio ()
1945 {
1946 croak ("unrequest sigio");
1947 }
1948
1949 #endif /* VMS */
1950 \f
1951 /* Note that VMS compiler won't accept defined (CANNOT_DUMP). */
1952 #ifndef CANNOT_DUMP
1953 #define NEED_STARTS
1954 #endif
1955
1956 #ifndef SYSTEM_MALLOC
1957 #ifndef NEED_STARTS
1958 #define NEED_STARTS
1959 #endif
1960 #endif
1961
1962 #ifdef NEED_STARTS
1963 /* Some systems that cannot dump also cannot implement these. */
1964
1965 /*
1966 * Return the address of the start of the text segment prior to
1967 * doing an unexec. After unexec the return value is undefined.
1968 * See crt0.c for further explanation and _start.
1969 *
1970 */
1971
1972 #ifndef HAVE_TEXT_START
1973 char *
1974 start_of_text ()
1975 {
1976 #ifdef TEXT_START
1977 return ((char *) TEXT_START);
1978 #else
1979 #ifdef GOULD
1980 extern csrt ();
1981 return ((char *) csrt);
1982 #else /* not GOULD */
1983 extern int _start ();
1984 return ((char *) _start);
1985 #endif /* GOULD */
1986 #endif /* TEXT_START */
1987 }
1988 #endif /* not HAVE_TEXT_START */
1989
1990 /*
1991 * Return the address of the start of the data segment prior to
1992 * doing an unexec. After unexec the return value is undefined.
1993 * See crt0.c for further information and definition of data_start.
1994 *
1995 * Apparently, on BSD systems this is etext at startup. On
1996 * USG systems (swapping) this is highly mmu dependent and
1997 * is also dependent on whether or not the program is running
1998 * with shared text. Generally there is a (possibly large)
1999 * gap between end of text and start of data with shared text.
2000 *
2001 * On Uniplus+ systems with shared text, data starts at a
2002 * fixed address. Each port (from a given oem) is generally
2003 * different, and the specific value of the start of data can
2004 * be obtained via the UniPlus+ specific "uvar" system call,
2005 * however the method outlined in crt0.c seems to be more portable.
2006 *
2007 * Probably what will have to happen when a USG unexec is available,
2008 * at least on UniPlus, is temacs will have to be made unshared so
2009 * that text and data are contiguous. Then once loadup is complete,
2010 * unexec will produce a shared executable where the data can be
2011 * at the normal shared text boundry and the startofdata variable
2012 * will be patched by unexec to the correct value.
2013 *
2014 */
2015
2016 char *
2017 start_of_data ()
2018 {
2019 #ifdef DATA_START
2020 return ((char *) DATA_START);
2021 #else
2022 #ifdef ORDINARY_LINK
2023 /*
2024 * This is a hack. Since we're not linking crt0.c or pre_crt0.c,
2025 * data_start isn't defined. We take the address of environ, which
2026 * is known to live at or near the start of the system crt0.c, and
2027 * we don't sweat the handful of bytes that might lose.
2028 */
2029 extern char **environ;
2030
2031 return((char *) &environ);
2032 #else
2033 extern int data_start;
2034 return ((char *) &data_start);
2035 #endif /* ORDINARY_LINK */
2036 #endif /* DATA_START */
2037 }
2038 #endif /* NEED_STARTS (not CANNOT_DUMP or not SYSTEM_MALLOC) */
2039
2040 #ifndef CANNOT_DUMP
2041 /* Some systems that cannot dump also cannot implement these. */
2042
2043 /*
2044 * Return the address of the end of the text segment prior to
2045 * doing an unexec. After unexec the return value is undefined.
2046 */
2047
2048 char *
2049 end_of_text ()
2050 {
2051 #ifdef TEXT_END
2052 return ((char *) TEXT_END);
2053 #else
2054 extern int etext;
2055 return ((char *) &etext);
2056 #endif
2057 }
2058
2059 /*
2060 * Return the address of the end of the data segment prior to
2061 * doing an unexec. After unexec the return value is undefined.
2062 */
2063
2064 char *
2065 end_of_data ()
2066 {
2067 #ifdef DATA_END
2068 return ((char *) DATA_END);
2069 #else
2070 extern int edata;
2071 return ((char *) &edata);
2072 #endif
2073 }
2074
2075 #endif /* not CANNOT_DUMP */
2076 \f
2077 /* init_system_name sets up the string for the Lisp function
2078 system-name to return. */
2079
2080 #ifdef BSD4_1
2081 #include <whoami.h>
2082 #endif
2083
2084 extern Lisp_Object Vsystem_name;
2085
2086 #ifndef BSD4_1
2087 #ifndef VMS
2088 #ifdef HAVE_SOCKETS
2089 #include <sys/socket.h>
2090 #include <netdb.h>
2091 #endif /* HAVE_SOCKETS */
2092 #endif /* not VMS */
2093 #endif /* not BSD4_1 */
2094
2095 void
2096 init_system_name ()
2097 {
2098 #ifdef BSD4_1
2099 Vsystem_name = build_string (sysname);
2100 #else
2101 #ifdef VMS
2102 char *sp, *end;
2103 if ((sp = egetenv ("SYS$NODE")) == 0)
2104 Vsystem_name = build_string ("vax-vms");
2105 else if ((end = index (sp, ':')) == 0)
2106 Vsystem_name = build_string (sp);
2107 else
2108 Vsystem_name = make_string (sp, end - sp);
2109 #else
2110 #ifndef HAVE_GETHOSTNAME
2111 struct utsname uts;
2112 uname (&uts);
2113 Vsystem_name = build_string (uts.nodename);
2114 #else /* HAVE_GETHOSTNAME */
2115 int hostname_size = 256;
2116 char *hostname = (char *) alloca (hostname_size);
2117
2118 /* Try to get the host name; if the buffer is too short, try
2119 again. Apparently, the only indication gethostname gives of
2120 whether the buffer was large enough is the presence or absence
2121 of a '\0' in the string. Eech. */
2122 for (;;)
2123 {
2124 gethostname (hostname, hostname_size - 1);
2125 hostname[hostname_size - 1] = '\0';
2126
2127 /* Was the buffer large enough for the '\0'? */
2128 if (strlen (hostname) < hostname_size - 1)
2129 break;
2130
2131 hostname_size <<= 1;
2132 hostname = (char *) alloca (hostname_size);
2133 }
2134 #ifdef HAVE_SOCKETS
2135 /* Turn the hostname into the official, fully-qualified hostname.
2136 Don't do this if we're going to dump; this can confuse system
2137 libraries on some machines and make the dumped emacs core dump. */
2138 #ifndef CANNOT_DUMP
2139 if (initialized)
2140 #endif /* not CANNOT_DUMP */
2141 {
2142 struct hostent *hp;
2143 int count;
2144 for (count = 0; count < 10; count++)
2145 {
2146 #ifdef TRY_AGAIN
2147 h_errno = 0;
2148 #endif
2149 hp = gethostbyname (hostname);
2150 #ifdef TRY_AGAIN
2151 if (! (hp == 0 && h_errno == TRY_AGAIN))
2152 #endif
2153 break;
2154 Fsleep_for (make_number (1), Qnil);
2155 }
2156 if (hp)
2157 {
2158 char *fqdn = hp->h_name;
2159 char *p;
2160
2161 if (!index (fqdn, '.'))
2162 {
2163 /* We still don't have a fully qualified domain name.
2164 Try to find one in the list of alternate names */
2165 char **alias = hp->h_aliases;
2166 while (*alias && !index (*alias, '.'))
2167 alias++;
2168 if (*alias)
2169 fqdn = *alias;
2170 }
2171 hostname = fqdn;
2172 #if 0
2173 /* Convert the host name to lower case. */
2174 /* Using ctype.h here would introduce a possible locale
2175 dependence that is probably wrong for hostnames. */
2176 p = hostname;
2177 while (*p)
2178 {
2179 if (*p >= 'A' && *p <= 'Z')
2180 *p += 'a' - 'A';
2181 p++;
2182 }
2183 #endif
2184 }
2185 }
2186 #endif /* HAVE_SOCKETS */
2187 Vsystem_name = build_string (hostname);
2188 #endif /* HAVE_GETHOSTNAME */
2189 #endif /* VMS */
2190 #endif /* BSD4_1 */
2191 {
2192 unsigned char *p;
2193 for (p = XSTRING (Vsystem_name)->data; *p; p++)
2194 if (*p == ' ' || *p == '\t')
2195 *p = '-';
2196 }
2197 }
2198 \f
2199 #ifndef VMS
2200 #ifndef HAVE_SELECT
2201
2202 #ifdef HAVE_X_WINDOWS
2203 /* Cause explanatory error message at compile time,
2204 since the select emulation is not good enough for X. */
2205 int *x = &x_windows_lose_if_no_select_system_call;
2206 #endif
2207
2208 /* Emulate as much as select as is possible under 4.1 and needed by Gnu Emacs
2209 * Only checks read descriptors.
2210 */
2211 /* How long to wait between checking fds in select */
2212 #define SELECT_PAUSE 1
2213 int select_alarmed;
2214
2215 /* For longjmp'ing back to read_input_waiting. */
2216
2217 jmp_buf read_alarm_throw;
2218
2219 /* Nonzero if the alarm signal should throw back to read_input_waiting.
2220 The read_socket_hook function sets this to 1 while it is waiting. */
2221
2222 int read_alarm_should_throw;
2223
2224 SIGTYPE
2225 select_alarm ()
2226 {
2227 select_alarmed = 1;
2228 #ifdef BSD4_1
2229 sigrelse (SIGALRM);
2230 #else /* not BSD4_1 */
2231 signal (SIGALRM, SIG_IGN);
2232 #endif /* not BSD4_1 */
2233 if (read_alarm_should_throw)
2234 longjmp (read_alarm_throw, 1);
2235 }
2236
2237 #ifndef WINDOWSNT
2238 /* Only rfds are checked. */
2239 int
2240 select (nfds, rfds, wfds, efds, timeout)
2241 int nfds;
2242 int *rfds, *wfds, *efds, *timeout;
2243 {
2244 int ravail = 0, orfds = 0, old_alarm;
2245 int timeoutval = timeout ? *timeout : 100000;
2246 int *local_timeout = &timeoutval;
2247 extern int proc_buffered_char[];
2248 #ifndef subprocesses
2249 int process_tick = 0, update_tick = 0;
2250 #else
2251 extern int process_tick, update_tick;
2252 #endif
2253 SIGTYPE (*old_trap) ();
2254 unsigned char buf;
2255
2256 if (rfds)
2257 {
2258 orfds = *rfds;
2259 *rfds = 0;
2260 }
2261 if (wfds)
2262 *wfds = 0;
2263 if (efds)
2264 *efds = 0;
2265
2266 /* If we are looking only for the terminal, with no timeout,
2267 just read it and wait -- that's more efficient. */
2268 if (orfds == 1 && *local_timeout == 100000 && process_tick == update_tick)
2269 {
2270 if (! detect_input_pending ())
2271 read_input_waiting ();
2272 *rfds = 1;
2273 return 1;
2274 }
2275
2276 /* Once a second, till the timer expires, check all the flagged read
2277 * descriptors to see if any input is available. If there is some then
2278 * set the corresponding bit in the return copy of rfds.
2279 */
2280 while (1)
2281 {
2282 register int to_check, bit, fd;
2283
2284 if (rfds)
2285 {
2286 for (to_check = nfds, bit = 1, fd = 0; --to_check >= 0; bit <<= 1, fd++)
2287 {
2288 if (orfds & bit)
2289 {
2290 int avail = 0, status = 0;
2291
2292 if (bit == 1)
2293 avail = detect_input_pending (); /* Special keyboard handler */
2294 else
2295 {
2296 #ifdef FIONREAD
2297 status = ioctl (fd, FIONREAD, &avail);
2298 #else /* no FIONREAD */
2299 #ifdef MSDOS
2300 abort (); /* I don't think we need it. */
2301 #else /* not MSDOS */
2302 /* Hoping it will return -1 if nothing available
2303 or 0 if all 0 chars requested are read. */
2304 if (proc_buffered_char[fd] >= 0)
2305 avail = 1;
2306 else
2307 {
2308 avail = read (fd, &buf, 1);
2309 if (avail > 0)
2310 proc_buffered_char[fd] = buf;
2311 }
2312 #endif /* not MSDOS */
2313 #endif /* no FIONREAD */
2314 }
2315 if (status >= 0 && avail > 0)
2316 {
2317 (*rfds) |= bit;
2318 ravail++;
2319 }
2320 }
2321 }
2322 }
2323 if (*local_timeout == 0 || ravail != 0 || process_tick != update_tick)
2324 break;
2325 old_alarm = alarm (0);
2326 old_trap = signal (SIGALRM, select_alarm);
2327 select_alarmed = 0;
2328 alarm (SELECT_PAUSE);
2329 /* Wait for a SIGALRM (or maybe a SIGTINT) */
2330 while (select_alarmed == 0 && *local_timeout != 0
2331 && process_tick == update_tick)
2332 {
2333 #ifdef MSDOS
2334 sleep_or_kbd_hit (SELECT_PAUSE, (orfds & 1) != 0);
2335 select_alarm ();
2336 #else /* not MSDOS */
2337 /* If we are interested in terminal input,
2338 wait by reading the terminal.
2339 That makes instant wakeup for terminal input at least. */
2340 if (orfds & 1)
2341 {
2342 read_input_waiting ();
2343 if (detect_input_pending ())
2344 select_alarmed = 1;
2345 }
2346 else
2347 pause ();
2348 #endif /* not MSDOS */
2349 }
2350 (*local_timeout) -= SELECT_PAUSE;
2351 /* Reset the old alarm if there was one */
2352 alarm (0);
2353 signal (SIGALRM, old_trap);
2354 if (old_alarm != 0)
2355 {
2356 /* Reset or forge an interrupt for the original handler. */
2357 old_alarm -= SELECT_PAUSE;
2358 if (old_alarm <= 0)
2359 kill (getpid (), SIGALRM); /* Fake an alarm with the orig' handler */
2360 else
2361 alarm (old_alarm);
2362 }
2363 if (*local_timeout == 0) /* Stop on timer being cleared */
2364 break;
2365 }
2366 return ravail;
2367 }
2368 #endif /* not WINDOWSNT */
2369
2370 /* Read keyboard input into the standard buffer,
2371 waiting for at least one character. */
2372
2373 /* Make all keyboard buffers much bigger when using X windows. */
2374 #ifdef HAVE_X_WINDOWS
2375 #define BUFFER_SIZE_FACTOR 16
2376 #else
2377 #define BUFFER_SIZE_FACTOR 1
2378 #endif
2379
2380 read_input_waiting ()
2381 {
2382 struct input_event e;
2383 int nread, i;
2384 extern int quit_char;
2385
2386 if (read_socket_hook)
2387 {
2388 struct input_event buf[256];
2389
2390 read_alarm_should_throw = 0;
2391 if (! setjmp (read_alarm_throw))
2392 nread = (*read_socket_hook) (0, buf, 256, 1, 0);
2393 else
2394 nread = -1;
2395
2396 /* Scan the chars for C-g and store them in kbd_buffer. */
2397 for (i = 0; i < nread; i++)
2398 {
2399 kbd_buffer_store_event (&buf[i]);
2400 /* Don't look at input that follows a C-g too closely.
2401 This reduces lossage due to autorepeat on C-g. */
2402 if (buf[i].kind == ascii_keystroke
2403 && XINT(buf[i].code) == quit_char)
2404 break;
2405 }
2406 }
2407 else
2408 {
2409 char buf[3];
2410 nread = read (fileno (stdin), buf, 1);
2411
2412 /* Scan the chars for C-g and store them in kbd_buffer. */
2413 e.kind = ascii_keystroke;
2414 XSETFRAME (e.frame_or_window, selected_frame);
2415 e.modifiers = 0;
2416 for (i = 0; i < nread; i++)
2417 {
2418 /* Convert chars > 0177 to meta events if desired.
2419 We do this under the same conditions that read_avail_input does. */
2420 if (read_socket_hook == 0)
2421 {
2422 /* If the user says she has a meta key, then believe her. */
2423 if (meta_key == 1 && (buf[i] & 0x80))
2424 e.modifiers = meta_modifier;
2425 if (meta_key != 2)
2426 buf[i] &= ~0x80;
2427 }
2428
2429 XSETINT (e.code, buf[i]);
2430 kbd_buffer_store_event (&e);
2431 /* Don't look at input that follows a C-g too closely.
2432 This reduces lossage due to autorepeat on C-g. */
2433 if (buf[i] == quit_char)
2434 break;
2435 }
2436 }
2437 }
2438
2439 #endif /* not HAVE_SELECT */
2440 #endif /* not VMS */
2441 \f
2442 #ifdef BSD4_1
2443 /*
2444 * Partially emulate 4.2 open call.
2445 * open is defined as this in 4.1.
2446 *
2447 * - added by Michael Bloom @ Citicorp/TTI
2448 *
2449 */
2450
2451 int
2452 sys_open (path, oflag, mode)
2453 char *path;
2454 int oflag, mode;
2455 {
2456 if (oflag & O_CREAT)
2457 return creat (path, mode);
2458 else
2459 return open (path, oflag);
2460 }
2461
2462 init_sigio (fd)
2463 int fd;
2464 {
2465 if (noninteractive)
2466 return;
2467 lmode = LINTRUP | lmode;
2468 ioctl (fd, TIOCLSET, &lmode);
2469 }
2470
2471 reset_sigio ()
2472 {
2473 if (noninteractive)
2474 return;
2475 lmode = ~LINTRUP & lmode;
2476 ioctl (0, TIOCLSET, &lmode);
2477 }
2478
2479 request_sigio ()
2480 {
2481 sigrelse (SIGTINT);
2482
2483 interrupts_deferred = 0;
2484 }
2485
2486 unrequest_sigio ()
2487 {
2488 sighold (SIGTINT);
2489
2490 interrupts_deferred = 1;
2491 }
2492
2493 /* still inside #ifdef BSD4_1 */
2494 #ifdef subprocesses
2495
2496 int sigheld; /* Mask of held signals */
2497
2498 sigholdx (signum)
2499 int signum;
2500 {
2501 sigheld |= sigbit (signum);
2502 sighold (signum);
2503 }
2504
2505 sigisheld (signum)
2506 int signum;
2507 {
2508 sigheld |= sigbit (signum);
2509 }
2510
2511 sigunhold (signum)
2512 int signum;
2513 {
2514 sigheld &= ~sigbit (signum);
2515 sigrelse (signum);
2516 }
2517
2518 sigfree () /* Free all held signals */
2519 {
2520 int i;
2521 for (i = 0; i < NSIG; i++)
2522 if (sigheld & sigbit (i))
2523 sigrelse (i);
2524 sigheld = 0;
2525 }
2526
2527 sigbit (i)
2528 {
2529 return 1 << (i - 1);
2530 }
2531 #endif /* subprocesses */
2532 #endif /* BSD4_1 */
2533 \f
2534 /* POSIX signals support - DJB */
2535 /* Anyone with POSIX signals should have ANSI C declarations */
2536
2537 #ifdef POSIX_SIGNALS
2538
2539 sigset_t old_mask, empty_mask, full_mask, temp_mask;
2540 static struct sigaction new_action, old_action;
2541
2542 init_signals ()
2543 {
2544 sigemptyset (&empty_mask);
2545 sigfillset (&full_mask);
2546 }
2547
2548 signal_handler_t
2549 sys_signal (int signal_number, signal_handler_t action)
2550 {
2551 #ifdef DGUX
2552 /* This gets us restartable system calls for efficiency.
2553 The "else" code will works as well. */
2554 return (berk_signal (signal_number, action));
2555 #else
2556 sigemptyset (&new_action.sa_mask);
2557 new_action.sa_handler = action;
2558 #ifdef SA_RESTART
2559 /* Emacs mostly works better with restartable system services. If this
2560 * flag exists, we probably want to turn it on here.
2561 */
2562 new_action.sa_flags = SA_RESTART;
2563 #else
2564 new_action.sa_flags = 0;
2565 #endif
2566 sigaction (signal_number, &new_action, &old_action);
2567 return (old_action.sa_handler);
2568 #endif /* DGUX */
2569 }
2570
2571 #ifndef __GNUC__
2572 /* If we're compiling with GCC, we don't need this function, since it
2573 can be written as a macro. */
2574 sigset_t
2575 sys_sigmask (int sig)
2576 {
2577 sigset_t mask;
2578 sigemptyset (&mask);
2579 sigaddset (&mask, sig);
2580 return mask;
2581 }
2582 #endif
2583
2584 int
2585 sys_sigpause (sigset_t new_mask)
2586 {
2587 /* pause emulating berk sigpause... */
2588 sigsuspend (&new_mask);
2589 return (EINTR);
2590 }
2591
2592 /* I'd like to have these guys return pointers to the mask storage in here,
2593 but there'd be trouble if the code was saving multiple masks. I'll be
2594 safe and pass the structure. It normally won't be more than 2 bytes
2595 anyhow. - DJB */
2596
2597 sigset_t
2598 sys_sigblock (sigset_t new_mask)
2599 {
2600 sigset_t old_mask;
2601 sigprocmask (SIG_BLOCK, &new_mask, &old_mask);
2602 return (old_mask);
2603 }
2604
2605 sigset_t
2606 sys_sigunblock (sigset_t new_mask)
2607 {
2608 sigset_t old_mask;
2609 sigprocmask (SIG_UNBLOCK, &new_mask, &old_mask);
2610 return (old_mask);
2611 }
2612
2613 sigset_t
2614 sys_sigsetmask (sigset_t new_mask)
2615 {
2616 sigset_t old_mask;
2617 sigprocmask (SIG_SETMASK, &new_mask, &old_mask);
2618 return (old_mask);
2619 }
2620
2621 #endif /* POSIX_SIGNALS */
2622 \f
2623 #ifndef BSTRING
2624
2625 #ifndef bzero
2626
2627 void
2628 bzero (b, length)
2629 register char *b;
2630 register int length;
2631 {
2632 #ifdef VMS
2633 short zero = 0;
2634 long max_str = 65535;
2635
2636 while (length > max_str) {
2637 (void) LIB$MOVC5 (&zero, &zero, &zero, &max_str, b);
2638 length -= max_str;
2639 b += max_str;
2640 }
2641 max_str = length;
2642 (void) LIB$MOVC5 (&zero, &zero, &zero, &max_str, b);
2643 #else
2644 while (length-- > 0)
2645 *b++ = 0;
2646 #endif /* not VMS */
2647 }
2648
2649 #endif /* no bzero */
2650
2651 #ifndef bcopy
2652 /* Saying `void' requires a declaration, above, where bcopy is used
2653 and that declaration causes pain for systems where bcopy is a macro. */
2654 bcopy (b1, b2, length)
2655 register char *b1;
2656 register char *b2;
2657 register int length;
2658 {
2659 #ifdef VMS
2660 long max_str = 65535;
2661
2662 while (length > max_str) {
2663 (void) LIB$MOVC3 (&max_str, b1, b2);
2664 length -= max_str;
2665 b1 += max_str;
2666 b2 += max_str;
2667 }
2668 max_str = length;
2669 (void) LIB$MOVC3 (&length, b1, b2);
2670 #else
2671 while (length-- > 0)
2672 *b2++ = *b1++;
2673 #endif /* not VMS */
2674 }
2675 #endif /* no bcopy */
2676
2677 #ifndef bcmp
2678 int
2679 bcmp (b1, b2, length) /* This could be a macro! */
2680 register char *b1;
2681 register char *b2;
2682 register int length;
2683 {
2684 #ifdef VMS
2685 struct dsc$descriptor_s src1 = {length, DSC$K_DTYPE_T, DSC$K_CLASS_S, b1};
2686 struct dsc$descriptor_s src2 = {length, DSC$K_DTYPE_T, DSC$K_CLASS_S, b2};
2687
2688 return STR$COMPARE (&src1, &src2);
2689 #else
2690 while (length-- > 0)
2691 if (*b1++ != *b2++)
2692 return 1;
2693
2694 return 0;
2695 #endif /* not VMS */
2696 }
2697 #endif /* no bcmp */
2698
2699 #endif /* not BSTRING */
2700 \f
2701 #ifndef HAVE_RANDOM
2702 #ifndef random
2703
2704 long
2705 random ()
2706 {
2707 #ifdef HAVE_LRAND48
2708 return lrand48 ();
2709 #else
2710 /* The BSD rand returns numbers in the range of 0 to 2e31 - 1,
2711 with unusable least significant bits. The USG rand returns
2712 numbers in the range of 0 to 2e15 - 1, all usable. Let us
2713 build a usable 30 bit number from either. */
2714 #ifdef USG
2715 return (rand () << 15) + rand ();
2716 #else
2717 return (rand () & 0x3fff8000) + (rand () >> 16);
2718 #endif
2719 #endif
2720 }
2721
2722 srandom (arg)
2723 int arg;
2724 {
2725 #ifdef HAVE_LRAND48
2726 srand48 (arg);
2727 #else
2728 srand (arg);
2729 #endif
2730 }
2731
2732 #endif /* no random */
2733 #endif /* not HAVE_RANDOM */
2734 \f
2735 #ifdef WRONG_NAME_INSQUE
2736
2737 insque (q,p)
2738 caddr_t q,p;
2739 {
2740 _insque (q,p);
2741 }
2742
2743 #endif
2744 \f
2745 #ifdef VMS
2746
2747 #ifdef getenv
2748 /* If any place else asks for the TERM variable,
2749 allow it to be overridden with the EMACS_TERM variable
2750 before attempting to translate the logical name TERM. As a last
2751 resort, ask for VAX C's special idea of the TERM variable. */
2752 #undef getenv
2753 char *
2754 sys_getenv (name)
2755 char *name;
2756 {
2757 register char *val;
2758 static char buf[256];
2759 static struct dsc$descriptor_s equiv
2760 = {sizeof (buf), DSC$K_DTYPE_T, DSC$K_CLASS_S, buf};
2761 static struct dsc$descriptor_s d_name
2762 = {0, DSC$K_DTYPE_T, DSC$K_CLASS_S, 0};
2763 short eqlen;
2764
2765 if (!strcmp (name, "TERM"))
2766 {
2767 val = (char *) getenv ("EMACS_TERM");
2768 if (val)
2769 return val;
2770 }
2771
2772 d_name.dsc$w_length = strlen (name);
2773 d_name.dsc$a_pointer = name;
2774 if (LIB$SYS_TRNLOG (&d_name, &eqlen, &equiv) == 1)
2775 {
2776 char *str = (char *) xmalloc (eqlen + 1);
2777 bcopy (buf, str, eqlen);
2778 str[eqlen] = '\0';
2779 /* This is a storage leak, but a pain to fix. With luck,
2780 no one will ever notice. */
2781 return str;
2782 }
2783 return (char *) getenv (name);
2784 }
2785 #endif /* getenv */
2786
2787 #ifdef abort
2788 /* Since VMS doesn't believe in core dumps, the only way to debug this beast is
2789 to force a call on the debugger from within the image. */
2790 #undef abort
2791 sys_abort ()
2792 {
2793 reset_sys_modes ();
2794 LIB$SIGNAL (SS$_DEBUG);
2795 }
2796 #endif /* abort */
2797 #endif /* VMS */
2798 \f
2799 #ifdef VMS
2800 #ifdef LINK_CRTL_SHARE
2801 #ifdef SHAREABLE_LIB_BUG
2802 /* Variables declared noshare and initialized in sharable libraries
2803 cannot be shared. The VMS linker incorrectly forces you to use a private
2804 version which is uninitialized... If not for this "feature", we
2805 could use the C library definition of sys_nerr and sys_errlist. */
2806 int sys_nerr = 35;
2807 char *sys_errlist[] =
2808 {
2809 "error 0",
2810 "not owner",
2811 "no such file or directory",
2812 "no such process",
2813 "interrupted system call",
2814 "i/o error",
2815 "no such device or address",
2816 "argument list too long",
2817 "exec format error",
2818 "bad file number",
2819 "no child process",
2820 "no more processes",
2821 "not enough memory",
2822 "permission denied",
2823 "bad address",
2824 "block device required",
2825 "mount devices busy",
2826 "file exists",
2827 "cross-device link",
2828 "no such device",
2829 "not a directory",
2830 "is a directory",
2831 "invalid argument",
2832 "file table overflow",
2833 "too many open files",
2834 "not a typewriter",
2835 "text file busy",
2836 "file too big",
2837 "no space left on device",
2838 "illegal seek",
2839 "read-only file system",
2840 "too many links",
2841 "broken pipe",
2842 "math argument",
2843 "result too large",
2844 "I/O stream empty",
2845 "vax/vms specific error code nontranslatable error"
2846 };
2847 #endif /* SHAREABLE_LIB_BUG */
2848 #endif /* LINK_CRTL_SHARE */
2849 #endif /* VMS */
2850
2851 #ifndef HAVE_STRERROR
2852 #ifndef WINDOWSNT
2853 char *
2854 strerror (errnum)
2855 int errnum;
2856 {
2857 extern char *sys_errlist[];
2858 extern int sys_nerr;
2859
2860 if (errnum >= 0 && errnum < sys_nerr)
2861 return sys_errlist[errnum];
2862 return (char *) "Unknown error";
2863 }
2864 #endif /* not WINDOWSNT */
2865 #endif /* ! HAVE_STRERROR */
2866 \f
2867 #ifdef INTERRUPTIBLE_OPEN
2868
2869 int
2870 /* VARARGS 2 */
2871 sys_open (path, oflag, mode)
2872 char *path;
2873 int oflag, mode;
2874 {
2875 register int rtnval;
2876
2877 while ((rtnval = open (path, oflag, mode)) == -1
2878 && (errno == EINTR));
2879 return (rtnval);
2880 }
2881
2882 #endif /* INTERRUPTIBLE_OPEN */
2883
2884 #ifdef INTERRUPTIBLE_CLOSE
2885
2886 sys_close (fd)
2887 int fd;
2888 {
2889 register int rtnval;
2890
2891 while ((rtnval = close (fd)) == -1
2892 && (errno == EINTR));
2893 return rtnval;
2894 }
2895
2896 #endif /* INTERRUPTIBLE_CLOSE */
2897
2898 #ifdef INTERRUPTIBLE_IO
2899
2900 int
2901 sys_read (fildes, buf, nbyte)
2902 int fildes;
2903 char *buf;
2904 unsigned int nbyte;
2905 {
2906 register int rtnval;
2907
2908 while ((rtnval = read (fildes, buf, nbyte)) == -1
2909 && (errno == EINTR));
2910 return (rtnval);
2911 }
2912
2913 int
2914 sys_write (fildes, buf, nbyte)
2915 int fildes;
2916 char *buf;
2917 unsigned int nbyte;
2918 {
2919 register int rtnval, bytes_written;
2920
2921 bytes_written = 0;
2922
2923 while (nbyte > 0)
2924 {
2925 rtnval = write (fildes, buf, nbyte);
2926
2927 if (rtnval == -1)
2928 {
2929 if (errno == EINTR)
2930 continue;
2931 else
2932 return (bytes_written ? bytes_written : -1);
2933 }
2934
2935 buf += rtnval;
2936 nbyte -= rtnval;
2937 bytes_written += rtnval;
2938 }
2939 return (bytes_written);
2940 }
2941
2942 #endif /* INTERRUPTIBLE_IO */
2943 \f
2944 #ifndef HAVE_VFORK
2945 #ifndef WINDOWSNT
2946 /*
2947 * Substitute fork for vfork on USG flavors.
2948 */
2949
2950 vfork ()
2951 {
2952 return (fork ());
2953 }
2954 #endif /* not WINDOWSNT */
2955 #endif /* not HAVE_VFORK */
2956 \f
2957 #ifdef USG
2958 /*
2959 * All of the following are for USG.
2960 *
2961 * On USG systems the system calls are INTERRUPTIBLE by signals
2962 * that the user program has elected to catch. Thus the system call
2963 * must be retried in these cases. To handle this without massive
2964 * changes in the source code, we remap the standard system call names
2965 * to names for our own functions in sysdep.c that do the system call
2966 * with retries. Actually, for portability reasons, it is good
2967 * programming practice, as this example shows, to limit all actual
2968 * system calls to a single occurrence in the source. Sure, this
2969 * adds an extra level of function call overhead but it is almost
2970 * always negligible. Fred Fish, Unisoft Systems Inc.
2971 */
2972
2973 #ifndef HAVE_SYS_SIGLIST
2974 char *sys_siglist[NSIG + 1] =
2975 {
2976 #ifdef AIX
2977 /* AIX has changed the signals a bit */
2978 "bogus signal", /* 0 */
2979 "hangup", /* 1 SIGHUP */
2980 "interrupt", /* 2 SIGINT */
2981 "quit", /* 3 SIGQUIT */
2982 "illegal instruction", /* 4 SIGILL */
2983 "trace trap", /* 5 SIGTRAP */
2984 "IOT instruction", /* 6 SIGIOT */
2985 "crash likely", /* 7 SIGDANGER */
2986 "floating point exception", /* 8 SIGFPE */
2987 "kill", /* 9 SIGKILL */
2988 "bus error", /* 10 SIGBUS */
2989 "segmentation violation", /* 11 SIGSEGV */
2990 "bad argument to system call", /* 12 SIGSYS */
2991 "write on a pipe with no one to read it", /* 13 SIGPIPE */
2992 "alarm clock", /* 14 SIGALRM */
2993 "software termination signum", /* 15 SIGTERM */
2994 "user defined signal 1", /* 16 SIGUSR1 */
2995 "user defined signal 2", /* 17 SIGUSR2 */
2996 "death of a child", /* 18 SIGCLD */
2997 "power-fail restart", /* 19 SIGPWR */
2998 "bogus signal", /* 20 */
2999 "bogus signal", /* 21 */
3000 "bogus signal", /* 22 */
3001 "bogus signal", /* 23 */
3002 "bogus signal", /* 24 */
3003 "LAN I/O interrupt", /* 25 SIGAIO */
3004 "PTY I/O interrupt", /* 26 SIGPTY */
3005 "I/O intervention required", /* 27 SIGIOINT */
3006 #ifdef AIXHFT
3007 "HFT grant", /* 28 SIGGRANT */
3008 "HFT retract", /* 29 SIGRETRACT */
3009 "HFT sound done", /* 30 SIGSOUND */
3010 "HFT input ready", /* 31 SIGMSG */
3011 #endif
3012 #else /* not AIX */
3013 "bogus signal", /* 0 */
3014 "hangup", /* 1 SIGHUP */
3015 "interrupt", /* 2 SIGINT */
3016 "quit", /* 3 SIGQUIT */
3017 "illegal instruction", /* 4 SIGILL */
3018 "trace trap", /* 5 SIGTRAP */
3019 "IOT instruction", /* 6 SIGIOT */
3020 "EMT instruction", /* 7 SIGEMT */
3021 "floating point exception", /* 8 SIGFPE */
3022 "kill", /* 9 SIGKILL */
3023 "bus error", /* 10 SIGBUS */
3024 "segmentation violation", /* 11 SIGSEGV */
3025 "bad argument to system call", /* 12 SIGSYS */
3026 "write on a pipe with no one to read it", /* 13 SIGPIPE */
3027 "alarm clock", /* 14 SIGALRM */
3028 "software termination signum", /* 15 SIGTERM */
3029 "user defined signal 1", /* 16 SIGUSR1 */
3030 "user defined signal 2", /* 17 SIGUSR2 */
3031 "death of a child", /* 18 SIGCLD */
3032 "power-fail restart", /* 19 SIGPWR */
3033 #ifdef sun
3034 "window size change", /* 20 SIGWINCH */
3035 "urgent socket condition", /* 21 SIGURG */
3036 "pollable event occured", /* 22 SIGPOLL */
3037 "stop (cannot be caught or ignored)", /* 23 SIGSTOP */
3038 "user stop requested from tty", /* 24 SIGTSTP */
3039 "stopped process has been continued", /* 25 SIGCONT */
3040 "background tty read attempted", /* 26 SIGTTIN */
3041 "background tty write attempted", /* 27 SIGTTOU */
3042 "virtual timer expired", /* 28 SIGVTALRM */
3043 "profiling timer expired", /* 29 SIGPROF */
3044 "exceeded cpu limit", /* 30 SIGXCPU */
3045 "exceeded file size limit", /* 31 SIGXFSZ */
3046 "process's lwps are blocked", /* 32 SIGWAITING */
3047 "special signal used by thread library", /* 33 SIGLWP */
3048 #ifdef SIGFREEZE
3049 "Special Signal Used By CPR", /* 34 SIGFREEZE */
3050 #endif
3051 #ifdef SIGTHAW
3052 "Special Signal Used By CPR", /* 35 SIGTHAW */
3053 #endif
3054 #endif /* sun */
3055 #endif /* not AIX */
3056 0
3057 };
3058 #endif /* HAVE_SYS_SIGLIST */
3059
3060 /*
3061 * Warning, this function may not duplicate 4.2 action properly
3062 * under error conditions.
3063 */
3064
3065 #ifndef MAXPATHLEN
3066 /* In 4.1, param.h fails to define this. */
3067 #define MAXPATHLEN 1024
3068 #endif
3069
3070 #ifndef HAVE_GETWD
3071
3072 char *
3073 getwd (pathname)
3074 char *pathname;
3075 {
3076 char *npath, *spath;
3077 extern char *getcwd ();
3078
3079 BLOCK_INPUT; /* getcwd uses malloc */
3080 spath = npath = getcwd ((char *) 0, MAXPATHLEN);
3081 if (spath == 0)
3082 return spath;
3083 /* On Altos 3068, getcwd can return @hostname/dir, so discard
3084 up to first slash. Should be harmless on other systems. */
3085 while (*npath && *npath != '/')
3086 npath++;
3087 strcpy (pathname, npath);
3088 free (spath); /* getcwd uses malloc */
3089 UNBLOCK_INPUT;
3090 return pathname;
3091 }
3092
3093 #endif /* HAVE_GETWD */
3094
3095 /*
3096 * Emulate rename using unlink/link. Note that this is
3097 * only partially correct. Also, doesn't enforce restriction
3098 * that files be of same type (regular->regular, dir->dir, etc).
3099 */
3100
3101 #ifndef HAVE_RENAME
3102
3103 rename (from, to)
3104 const char *from;
3105 const char *to;
3106 {
3107 if (access (from, 0) == 0)
3108 {
3109 unlink (to);
3110 if (link (from, to) == 0)
3111 if (unlink (from) == 0)
3112 return (0);
3113 }
3114 return (-1);
3115 }
3116
3117 #endif
3118
3119
3120 #ifdef HPUX
3121 #ifndef HAVE_PERROR
3122
3123 /* HPUX curses library references perror, but as far as we know
3124 it won't be called. Anyway this definition will do for now. */
3125
3126 perror ()
3127 {
3128 }
3129
3130 #endif /* not HAVE_PERROR */
3131 #endif /* HPUX */
3132
3133 #ifndef HAVE_DUP2
3134
3135 /*
3136 * Emulate BSD dup2. First close newd if it already exists.
3137 * Then, attempt to dup oldd. If not successful, call dup2 recursively
3138 * until we are, then close the unsuccessful ones.
3139 */
3140
3141 dup2 (oldd, newd)
3142 int oldd;
3143 int newd;
3144 {
3145 register int fd, ret;
3146
3147 sys_close (newd);
3148
3149 #ifdef F_DUPFD
3150 fd = fcntl (oldd, F_DUPFD, newd);
3151 if (fd != newd)
3152 error ("can't dup2 (%i,%i) : %s", oldd, newd, strerror (errno));
3153 #else
3154 fd = dup (old);
3155 if (fd == -1)
3156 return -1;
3157 if (fd == new)
3158 return new;
3159 ret = dup2 (old,new);
3160 sys_close (fd);
3161 return ret;
3162 #endif
3163 }
3164
3165 #endif /* not HAVE_DUP2 */
3166
3167 /*
3168 * Gettimeofday. Simulate as much as possible. Only accurate
3169 * to nearest second. Emacs doesn't use tzp so ignore it for now.
3170 * Only needed when subprocesses are defined.
3171 */
3172
3173 #ifdef subprocesses
3174 #ifndef VMS
3175 #ifndef HAVE_GETTIMEOFDAY
3176 #ifdef HAVE_TIMEVAL
3177
3178 /* ARGSUSED */
3179 gettimeofday (tp, tzp)
3180 struct timeval *tp;
3181 struct timezone *tzp;
3182 {
3183 extern long time ();
3184
3185 tp->tv_sec = time ((long *)0);
3186 tp->tv_usec = 0;
3187 if (tzp != 0)
3188 tzp->tz_minuteswest = -1;
3189 }
3190
3191 #endif
3192 #endif
3193 #endif
3194 #endif /* subprocess && !HAVE_GETTIMEOFDAY && HAVE_TIMEVAL && !VMS */
3195
3196 /*
3197 * This function will go away as soon as all the stubs fixed. (fnf)
3198 */
3199
3200 croak (badfunc)
3201 char *badfunc;
3202 {
3203 printf ("%s not yet implemented\r\n", badfunc);
3204 reset_sys_modes ();
3205 exit (1);
3206 }
3207
3208 #endif /* USG */
3209 \f
3210 #ifdef DGUX
3211
3212 char *sys_siglist[NSIG + 1] =
3213 {
3214 "null signal", /* 0 SIGNULL */
3215 "hangup", /* 1 SIGHUP */
3216 "interrupt", /* 2 SIGINT */
3217 "quit", /* 3 SIGQUIT */
3218 "illegal instruction", /* 4 SIGILL */
3219 "trace trap", /* 5 SIGTRAP */
3220 "abort termination", /* 6 SIGABRT */
3221 "SIGEMT", /* 7 SIGEMT */
3222 "floating point exception", /* 8 SIGFPE */
3223 "kill", /* 9 SIGKILL */
3224 "bus error", /* 10 SIGBUS */
3225 "segmentation violation", /* 11 SIGSEGV */
3226 "bad argument to system call", /* 12 SIGSYS */
3227 "write on a pipe with no reader", /* 13 SIGPIPE */
3228 "alarm clock", /* 14 SIGALRM */
3229 "software termination signal", /* 15 SIGTERM */
3230 "user defined signal 1", /* 16 SIGUSR1 */
3231 "user defined signal 2", /* 17 SIGUSR2 */
3232 "child stopped or terminated", /* 18 SIGCLD */
3233 "power-fail restart", /* 19 SIGPWR */
3234 "window size changed", /* 20 SIGWINCH */
3235 "undefined", /* 21 */
3236 "pollable event occurred", /* 22 SIGPOLL */
3237 "sendable stop signal not from tty", /* 23 SIGSTOP */
3238 "stop signal from tty", /* 24 SIGSTP */
3239 "continue a stopped process", /* 25 SIGCONT */
3240 "attempted background tty read", /* 26 SIGTTIN */
3241 "attempted background tty write", /* 27 SIGTTOU */
3242 "undefined", /* 28 */
3243 "undefined", /* 29 */
3244 "undefined", /* 30 */
3245 "undefined", /* 31 */
3246 "undefined", /* 32 */
3247 "socket (TCP/IP) urgent data arrival", /* 33 SIGURG */
3248 "I/O is possible", /* 34 SIGIO */
3249 "exceeded cpu time limit", /* 35 SIGXCPU */
3250 "exceeded file size limit", /* 36 SIGXFSZ */
3251 "virtual time alarm", /* 37 SIGVTALRM */
3252 "profiling time alarm", /* 38 SIGPROF */
3253 "undefined", /* 39 */
3254 "file record locks revoked", /* 40 SIGLOST */
3255 "undefined", /* 41 */
3256 "undefined", /* 42 */
3257 "undefined", /* 43 */
3258 "undefined", /* 44 */
3259 "undefined", /* 45 */
3260 "undefined", /* 46 */
3261 "undefined", /* 47 */
3262 "undefined", /* 48 */
3263 "undefined", /* 49 */
3264 "undefined", /* 50 */
3265 "undefined", /* 51 */
3266 "undefined", /* 52 */
3267 "undefined", /* 53 */
3268 "undefined", /* 54 */
3269 "undefined", /* 55 */
3270 "undefined", /* 56 */
3271 "undefined", /* 57 */
3272 "undefined", /* 58 */
3273 "undefined", /* 59 */
3274 "undefined", /* 60 */
3275 "undefined", /* 61 */
3276 "undefined", /* 62 */
3277 "undefined", /* 63 */
3278 "notification message in mess. queue", /* 64 SIGDGNOTIFY */
3279 0
3280 };
3281
3282 #endif /* DGUX */
3283 \f
3284 /* Directory routines for systems that don't have them. */
3285
3286 #ifdef SYSV_SYSTEM_DIR
3287
3288 #include <dirent.h>
3289
3290 #if defined(BROKEN_CLOSEDIR) || !defined(HAVE_CLOSEDIR)
3291
3292 int
3293 closedir (dirp)
3294 register DIR *dirp; /* stream from opendir */
3295 {
3296 int rtnval;
3297
3298 rtnval = sys_close (dirp->dd_fd);
3299
3300 /* Some systems (like Solaris) allocate the buffer and the DIR all
3301 in one block. Why in the world are we freeing this ourselves
3302 anyway? */
3303 #if ! (defined (sun) && defined (USG5_4))
3304 xfree ((char *) dirp->dd_buf); /* directory block defined in <dirent.h> */
3305 #endif
3306 xfree ((char *) dirp);
3307
3308 return rtnval;
3309 }
3310 #endif /* BROKEN_CLOSEDIR or not HAVE_CLOSEDIR */
3311 #endif /* SYSV_SYSTEM_DIR */
3312
3313 #ifdef NONSYSTEM_DIR_LIBRARY
3314
3315 DIR *
3316 opendir (filename)
3317 char *filename; /* name of directory */
3318 {
3319 register DIR *dirp; /* -> malloc'ed storage */
3320 register int fd; /* file descriptor for read */
3321 struct stat sbuf; /* result of fstat */
3322
3323 fd = sys_open (filename, 0);
3324 if (fd < 0)
3325 return 0;
3326
3327 BLOCK_INPUT;
3328 if (fstat (fd, &sbuf) < 0
3329 || (sbuf.st_mode & S_IFMT) != S_IFDIR
3330 || (dirp = (DIR *) malloc (sizeof (DIR))) == 0)
3331 {
3332 sys_close (fd);
3333 UNBLOCK_INPUT;
3334 return 0; /* bad luck today */
3335 }
3336 UNBLOCK_INPUT;
3337
3338 dirp->dd_fd = fd;
3339 dirp->dd_loc = dirp->dd_size = 0; /* refill needed */
3340
3341 return dirp;
3342 }
3343
3344 void
3345 closedir (dirp)
3346 register DIR *dirp; /* stream from opendir */
3347 {
3348 sys_close (dirp->dd_fd);
3349 xfree ((char *) dirp);
3350 }
3351
3352
3353 #ifndef VMS
3354 #define DIRSIZ 14
3355 struct olddir
3356 {
3357 ino_t od_ino; /* inode */
3358 char od_name[DIRSIZ]; /* filename */
3359 };
3360 #endif /* not VMS */
3361
3362 struct direct dir_static; /* simulated directory contents */
3363
3364 /* ARGUSED */
3365 struct direct *
3366 readdir (dirp)
3367 register DIR *dirp; /* stream from opendir */
3368 {
3369 #ifndef VMS
3370 register struct olddir *dp; /* -> directory data */
3371 #else /* VMS */
3372 register struct dir$_name *dp; /* -> directory data */
3373 register struct dir$_version *dv; /* -> version data */
3374 #endif /* VMS */
3375
3376 for (; ;)
3377 {
3378 if (dirp->dd_loc >= dirp->dd_size)
3379 dirp->dd_loc = dirp->dd_size = 0;
3380
3381 if (dirp->dd_size == 0 /* refill buffer */
3382 && (dirp->dd_size = sys_read (dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ)) <= 0)
3383 return 0;
3384
3385 #ifndef VMS
3386 dp = (struct olddir *) &dirp->dd_buf[dirp->dd_loc];
3387 dirp->dd_loc += sizeof (struct olddir);
3388
3389 if (dp->od_ino != 0) /* not deleted entry */
3390 {
3391 dir_static.d_ino = dp->od_ino;
3392 strncpy (dir_static.d_name, dp->od_name, DIRSIZ);
3393 dir_static.d_name[DIRSIZ] = '\0';
3394 dir_static.d_namlen = strlen (dir_static.d_name);
3395 dir_static.d_reclen = sizeof (struct direct)
3396 - MAXNAMLEN + 3
3397 + dir_static.d_namlen - dir_static.d_namlen % 4;
3398 return &dir_static; /* -> simulated structure */
3399 }
3400 #else /* VMS */
3401 dp = (struct dir$_name *) dirp->dd_buf;
3402 if (dirp->dd_loc == 0)
3403 dirp->dd_loc = (dp->dir$b_namecount&1) ? dp->dir$b_namecount + 1
3404 : dp->dir$b_namecount;
3405 dv = (struct dir$_version *)&dp->dir$t_name[dirp->dd_loc];
3406 dir_static.d_ino = dv->dir$w_fid_num;
3407 dir_static.d_namlen = dp->dir$b_namecount;
3408 dir_static.d_reclen = sizeof (struct direct)
3409 - MAXNAMLEN + 3
3410 + dir_static.d_namlen - dir_static.d_namlen % 4;
3411 strncpy (dir_static.d_name, dp->dir$t_name, dp->dir$b_namecount);
3412 dir_static.d_name[dir_static.d_namlen] = '\0';
3413 dirp->dd_loc = dirp->dd_size; /* only one record at a time */
3414 return &dir_static;
3415 #endif /* VMS */
3416 }
3417 }
3418
3419 #ifdef VMS
3420 /* readdirver is just like readdir except it returns all versions of a file
3421 as separate entries. */
3422
3423 /* ARGUSED */
3424 struct direct *
3425 readdirver (dirp)
3426 register DIR *dirp; /* stream from opendir */
3427 {
3428 register struct dir$_name *dp; /* -> directory data */
3429 register struct dir$_version *dv; /* -> version data */
3430
3431 if (dirp->dd_loc >= dirp->dd_size - sizeof (struct dir$_name))
3432 dirp->dd_loc = dirp->dd_size = 0;
3433
3434 if (dirp->dd_size == 0 /* refill buffer */
3435 && (dirp->dd_size = sys_read (dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ)) <= 0)
3436 return 0;
3437
3438 dp = (struct dir$_name *) dirp->dd_buf;
3439 if (dirp->dd_loc == 0)
3440 dirp->dd_loc = (dp->dir$b_namecount & 1) ? dp->dir$b_namecount + 1
3441 : dp->dir$b_namecount;
3442 dv = (struct dir$_version *) &dp->dir$t_name[dirp->dd_loc];
3443 strncpy (dir_static.d_name, dp->dir$t_name, dp->dir$b_namecount);
3444 sprintf (&dir_static.d_name[dp->dir$b_namecount], ";%d", dv->dir$w_version);
3445 dir_static.d_namlen = strlen (dir_static.d_name);
3446 dir_static.d_ino = dv->dir$w_fid_num;
3447 dir_static.d_reclen = sizeof (struct direct) - MAXNAMLEN + 3
3448 + dir_static.d_namlen - dir_static.d_namlen % 4;
3449 dirp->dd_loc = ((char *) (++dv) - dp->dir$t_name);
3450 return &dir_static;
3451 }
3452
3453 #endif /* VMS */
3454
3455 #endif /* NONSYSTEM_DIR_LIBRARY */
3456
3457 \f
3458 int
3459 set_file_times (filename, atime, mtime)
3460 char *filename;
3461 EMACS_TIME atime, mtime;
3462 {
3463 #ifdef HAVE_UTIMES
3464 struct timeval tv[2];
3465 tv[0] = atime;
3466 tv[1] = mtime;
3467 return utimes (filename, tv);
3468 #else /* not HAVE_UTIMES */
3469 struct utimbuf utb;
3470 utb.actime = EMACS_SECS (atime);
3471 utb.modtime = EMACS_SECS (mtime);
3472 return utime (filename, &utb);
3473 #endif /* not HAVE_UTIMES */
3474 }
3475 \f
3476 /* mkdir and rmdir functions, for systems which don't have them. */
3477
3478 #ifndef HAVE_MKDIR
3479 /*
3480 * Written by Robert Rother, Mariah Corporation, August 1985.
3481 *
3482 * If you want it, it's yours. All I ask in return is that if you
3483 * figure out how to do this in a Bourne Shell script you send me
3484 * a copy.
3485 * sdcsvax!rmr or rmr@uscd
3486 *
3487 * Severely hacked over by John Gilmore to make a 4.2BSD compatible
3488 * subroutine. 11Mar86; hoptoad!gnu
3489 *
3490 * Modified by rmtodd@uokmax 6-28-87 -- when making an already existing dir,
3491 * subroutine didn't return EEXIST. It does now.
3492 */
3493
3494 /*
3495 * Make a directory.
3496 */
3497 #ifdef MKDIR_PROTOTYPE
3498 MKDIR_PROTOTYPE
3499 #else
3500 int
3501 mkdir (dpath, dmode)
3502 char *dpath;
3503 int dmode;
3504 #endif
3505 {
3506 int cpid, status, fd;
3507 struct stat statbuf;
3508
3509 if (stat (dpath, &statbuf) == 0)
3510 {
3511 errno = EEXIST; /* Stat worked, so it already exists */
3512 return -1;
3513 }
3514
3515 /* If stat fails for a reason other than non-existence, return error */
3516 if (errno != ENOENT)
3517 return -1;
3518
3519 synch_process_alive = 1;
3520 switch (cpid = fork ())
3521 {
3522
3523 case -1: /* Error in fork */
3524 return (-1); /* Errno is set already */
3525
3526 case 0: /* Child process */
3527 /*
3528 * Cheap hack to set mode of new directory. Since this
3529 * child process is going away anyway, we zap its umask.
3530 * FIXME, this won't suffice to set SUID, SGID, etc. on this
3531 * directory. Does anybody care?
3532 */
3533 status = umask (0); /* Get current umask */
3534 status = umask (status | (0777 & ~dmode)); /* Set for mkdir */
3535 fd = sys_open("/dev/null", 2);
3536 if (fd >= 0)
3537 {
3538 dup2 (fd, 0);
3539 dup2 (fd, 1);
3540 dup2 (fd, 2);
3541 }
3542 execl ("/bin/mkdir", "mkdir", dpath, (char *) 0);
3543 _exit (-1); /* Can't exec /bin/mkdir */
3544
3545 default: /* Parent process */
3546 wait_for_termination (cpid);
3547 }
3548
3549 if (synch_process_death != 0 || synch_process_retcode != 0)
3550 {
3551 errno = EIO; /* We don't know why, but */
3552 return -1; /* /bin/mkdir failed */
3553 }
3554
3555 return 0;
3556 }
3557 #endif /* not HAVE_MKDIR */
3558
3559 #ifndef HAVE_RMDIR
3560 int
3561 rmdir (dpath)
3562 char *dpath;
3563 {
3564 int cpid, status, fd;
3565 struct stat statbuf;
3566
3567 if (stat (dpath, &statbuf) != 0)
3568 {
3569 /* Stat just set errno. We don't have to */
3570 return -1;
3571 }
3572
3573 synch_process_alive = 1;
3574 switch (cpid = fork ())
3575 {
3576
3577 case -1: /* Error in fork */
3578 return (-1); /* Errno is set already */
3579
3580 case 0: /* Child process */
3581 fd = sys_open("/dev/null", 2);
3582 if (fd >= 0)
3583 {
3584 dup2 (fd, 0);
3585 dup2 (fd, 1);
3586 dup2 (fd, 2);
3587 }
3588 wait_for_termination (cpid);
3589 if (synch_process_death != 0 || synch_process_retcode != 0)
3590 return -1; /* /bin/rmdir failed */
3591 default: /* Parent process */
3592 while (cpid != wait (&status)); /* Wait for kid to finish */
3593 }
3594
3595 if (WIFSIGNALED (status) || WEXITSTATUS (status) != 0)
3596 {
3597 errno = EIO; /* We don't know why, but */
3598 return -1; /* /bin/mkdir failed */
3599 }
3600
3601 return 0;
3602 }
3603 #endif /* !HAVE_RMDIR */
3604
3605
3606 \f
3607 /* Functions for VMS */
3608 #ifdef VMS
3609 #include "vms-pwd.h"
3610 #include <acldef.h>
3611 #include <chpdef.h>
3612 #include <jpidef.h>
3613
3614 /* Return as a string the VMS error string pertaining to STATUS.
3615 Reuses the same static buffer each time it is called. */
3616
3617 char *
3618 vmserrstr (status)
3619 int status; /* VMS status code */
3620 {
3621 int bufadr[2];
3622 short len;
3623 static char buf[257];
3624
3625 bufadr[0] = sizeof buf - 1;
3626 bufadr[1] = (int) buf;
3627 if (! (SYS$GETMSG (status, &len, bufadr, 0x1, 0) & 1))
3628 return "untranslatable VMS error status";
3629 buf[len] = '\0';
3630 return buf;
3631 }
3632
3633 #ifdef access
3634 #undef access
3635
3636 /* The following is necessary because 'access' emulation by VMS C (2.0) does
3637 * not work correctly. (It also doesn't work well in version 2.3.)
3638 */
3639
3640 #ifdef VMS4_4
3641
3642 #define DESCRIPTOR(name,string) struct dsc$descriptor_s name = \
3643 { strlen (string), DSC$K_DTYPE_T, DSC$K_CLASS_S, string }
3644
3645 typedef union {
3646 struct {
3647 unsigned short s_buflen;
3648 unsigned short s_code;
3649 char *s_bufadr;
3650 unsigned short *s_retlenadr;
3651 } s;
3652 int end;
3653 } item;
3654 #define buflen s.s_buflen
3655 #define code s.s_code
3656 #define bufadr s.s_bufadr
3657 #define retlenadr s.s_retlenadr
3658
3659 #define R_OK 4 /* test for read permission */
3660 #define W_OK 2 /* test for write permission */
3661 #define X_OK 1 /* test for execute (search) permission */
3662 #define F_OK 0 /* test for presence of file */
3663
3664 int
3665 sys_access (path, mode)
3666 char *path;
3667 int mode;
3668 {
3669 static char *user = NULL;
3670 char dir_fn[512];
3671
3672 /* translate possible directory spec into .DIR file name, so brain-dead
3673 * access can treat the directory like a file. */
3674 if (directory_file_name (path, dir_fn))
3675 path = dir_fn;
3676
3677 if (mode == F_OK)
3678 return access (path, mode);
3679 if (user == NULL && (user = (char *) getenv ("USER")) == NULL)
3680 return -1;
3681 {
3682 int stat;
3683 int flags;
3684 int acces;
3685 unsigned short int dummy;
3686 item itemlst[3];
3687 static int constant = ACL$C_FILE;
3688 DESCRIPTOR (path_desc, path);
3689 DESCRIPTOR (user_desc, user);
3690
3691 flags = 0;
3692 acces = 0;
3693 if ((mode & X_OK) && ((stat = access (path, mode)) < 0 || mode == X_OK))
3694 return stat;
3695 if (mode & R_OK)
3696 acces |= CHP$M_READ;
3697 if (mode & W_OK)
3698 acces |= CHP$M_WRITE;
3699 itemlst[0].buflen = sizeof (int);
3700 itemlst[0].code = CHP$_FLAGS;
3701 itemlst[0].bufadr = (char *) &flags;
3702 itemlst[0].retlenadr = &dummy;
3703 itemlst[1].buflen = sizeof (int);
3704 itemlst[1].code = CHP$_ACCESS;
3705 itemlst[1].bufadr = (char *) &acces;
3706 itemlst[1].retlenadr = &dummy;
3707 itemlst[2].end = CHP$_END;
3708 stat = SYS$CHECK_ACCESS (&constant, &path_desc, &user_desc, itemlst);
3709 return stat == SS$_NORMAL ? 0 : -1;
3710 }
3711 }
3712
3713 #else /* not VMS4_4 */
3714
3715 #include <prvdef.h>
3716 #define ACE$M_WRITE 2
3717 #define ACE$C_KEYID 1
3718
3719 static unsigned short memid, grpid;
3720 static unsigned int uic;
3721
3722 /* Called from init_sys_modes, so it happens not very often
3723 but at least each time Emacs is loaded. */
3724 sys_access_reinit ()
3725 {
3726 uic = 0;
3727 }
3728
3729 int
3730 sys_access (filename, type)
3731 char * filename;
3732 int type;
3733 {
3734 struct FAB fab;
3735 struct XABPRO xab;
3736 int status, size, i, typecode, acl_controlled;
3737 unsigned int *aclptr, *aclend, aclbuf[60];
3738 union prvdef prvmask;
3739
3740 /* Get UIC and GRP values for protection checking. */
3741 if (uic == 0)
3742 {
3743 status = LIB$GETJPI (&JPI$_UIC, 0, 0, &uic, 0, 0);
3744 if (! (status & 1))
3745 return -1;
3746 memid = uic & 0xFFFF;
3747 grpid = uic >> 16;
3748 }
3749
3750 if (type != 2) /* not checking write access */
3751 return access (filename, type);
3752
3753 /* Check write protection. */
3754
3755 #define CHECKPRIV(bit) (prvmask.bit)
3756 #define WRITEABLE(field) (! ((xab.xab$w_pro >> field) & XAB$M_NOWRITE))
3757
3758 /* Find privilege bits */
3759 status = SYS$SETPRV (0, 0, 0, prvmask);
3760 if (! (status & 1))
3761 error ("Unable to find privileges: %s", vmserrstr (status));
3762 if (CHECKPRIV (PRV$V_BYPASS))
3763 return 0; /* BYPASS enabled */
3764 fab = cc$rms_fab;
3765 fab.fab$b_fac = FAB$M_GET;
3766 fab.fab$l_fna = filename;
3767 fab.fab$b_fns = strlen (filename);
3768 fab.fab$l_xab = &xab;
3769 xab = cc$rms_xabpro;
3770 xab.xab$l_aclbuf = aclbuf;
3771 xab.xab$w_aclsiz = sizeof (aclbuf);
3772 status = SYS$OPEN (&fab, 0, 0);
3773 if (! (status & 1))
3774 return -1;
3775 SYS$CLOSE (&fab, 0, 0);
3776 /* Check system access */
3777 if (CHECKPRIV (PRV$V_SYSPRV) && WRITEABLE (XAB$V_SYS))
3778 return 0;
3779 /* Check ACL entries, if any */
3780 acl_controlled = 0;
3781 if (xab.xab$w_acllen > 0)
3782 {
3783 aclptr = aclbuf;
3784 aclend = &aclbuf[xab.xab$w_acllen / 4];
3785 while (*aclptr && aclptr < aclend)
3786 {
3787 size = (*aclptr & 0xff) / 4;
3788 typecode = (*aclptr >> 8) & 0xff;
3789 if (typecode == ACE$C_KEYID)
3790 for (i = size - 1; i > 1; i--)
3791 if (aclptr[i] == uic)
3792 {
3793 acl_controlled = 1;
3794 if (aclptr[1] & ACE$M_WRITE)
3795 return 0; /* Write access through ACL */
3796 }
3797 aclptr = &aclptr[size];
3798 }
3799 if (acl_controlled) /* ACL specified, prohibits write access */
3800 return -1;
3801 }
3802 /* No ACL entries specified, check normal protection */
3803 if (WRITEABLE (XAB$V_WLD)) /* World writeable */
3804 return 0;
3805 if (WRITEABLE (XAB$V_GRP) &&
3806 (unsigned short) (xab.xab$l_uic >> 16) == grpid)
3807 return 0; /* Group writeable */
3808 if (WRITEABLE (XAB$V_OWN) &&
3809 (xab.xab$l_uic & 0xFFFF) == memid)
3810 return 0; /* Owner writeable */
3811
3812 return -1; /* Not writeable */
3813 }
3814 #endif /* not VMS4_4 */
3815 #endif /* access */
3816
3817 static char vtbuf[NAM$C_MAXRSS+1];
3818
3819 /* translate a vms file spec to a unix path */
3820 char *
3821 sys_translate_vms (vfile)
3822 char * vfile;
3823 {
3824 char * p;
3825 char * targ;
3826
3827 if (!vfile)
3828 return 0;
3829
3830 targ = vtbuf;
3831
3832 /* leading device or logical name is a root directory */
3833 if (p = strchr (vfile, ':'))
3834 {
3835 *targ++ = '/';
3836 while (vfile < p)
3837 *targ++ = *vfile++;
3838 vfile++;
3839 *targ++ = '/';
3840 }
3841 p = vfile;
3842 if (*p == '[' || *p == '<')
3843 {
3844 while (*++vfile != *p + 2)
3845 switch (*vfile)
3846 {
3847 case '.':
3848 if (vfile[-1] == *p)
3849 *targ++ = '.';
3850 *targ++ = '/';
3851 break;
3852
3853 case '-':
3854 *targ++ = '.';
3855 *targ++ = '.';
3856 break;
3857
3858 default:
3859 *targ++ = *vfile;
3860 break;
3861 }
3862 vfile++;
3863 *targ++ = '/';
3864 }
3865 while (*vfile)
3866 *targ++ = *vfile++;
3867
3868 return vtbuf;
3869 }
3870
3871 static char utbuf[NAM$C_MAXRSS+1];
3872
3873 /* translate a unix path to a VMS file spec */
3874 char *
3875 sys_translate_unix (ufile)
3876 char * ufile;
3877 {
3878 int slash_seen = 0;
3879 char *p;
3880 char * targ;
3881
3882 if (!ufile)
3883 return 0;
3884
3885 targ = utbuf;
3886
3887 if (*ufile == '/')
3888 {
3889 ufile++;
3890 }
3891
3892 while (*ufile)
3893 {
3894 switch (*ufile)
3895 {
3896 case '/':
3897 if (slash_seen)
3898 if (index (&ufile[1], '/'))
3899 *targ++ = '.';
3900 else
3901 *targ++ = ']';
3902 else
3903 {
3904 *targ++ = ':';
3905 if (index (&ufile[1], '/'))
3906 *targ++ = '[';
3907 slash_seen = 1;
3908 }
3909 break;
3910
3911 case '.':
3912 if (strncmp (ufile, "./", 2) == 0)
3913 {
3914 if (!slash_seen)
3915 {
3916 *targ++ = '[';
3917 slash_seen = 1;
3918 }
3919 ufile++; /* skip the dot */
3920 if (index (&ufile[1], '/'))
3921 *targ++ = '.';
3922 else
3923 *targ++ = ']';
3924 }
3925 else if (strncmp (ufile, "../", 3) == 0)
3926 {
3927 if (!slash_seen)
3928 {
3929 *targ++ = '[';
3930 slash_seen = 1;
3931 }
3932 *targ++ = '-';
3933 ufile += 2; /* skip the dots */
3934 if (index (&ufile[1], '/'))
3935 *targ++ = '.';
3936 else
3937 *targ++ = ']';
3938 }
3939 else
3940 *targ++ = *ufile;
3941 break;
3942
3943 default:
3944 *targ++ = *ufile;
3945 break;
3946 }
3947 ufile++;
3948 }
3949 *targ = '\0';
3950
3951 return utbuf;
3952 }
3953
3954 char *
3955 getwd (pathname)
3956 char *pathname;
3957 {
3958 char *ptr, *val;
3959 extern char *getcwd ();
3960
3961 #define MAXPATHLEN 1024
3962
3963 ptr = xmalloc (MAXPATHLEN);
3964 val = getcwd (ptr, MAXPATHLEN);
3965 if (val == 0)
3966 {
3967 xfree (ptr);
3968 return val;
3969 }
3970 strcpy (pathname, ptr);
3971 xfree (ptr);
3972
3973 return pathname;
3974 }
3975
3976 getppid ()
3977 {
3978 long item_code = JPI$_OWNER;
3979 unsigned long parent_id;
3980 int status;
3981
3982 if (((status = LIB$GETJPI (&item_code, 0, 0, &parent_id)) & 1) == 0)
3983 {
3984 errno = EVMSERR;
3985 vaxc$errno = status;
3986 return -1;
3987 }
3988 return parent_id;
3989 }
3990
3991 #undef getuid
3992 unsigned
3993 sys_getuid ()
3994 {
3995 return (getgid () << 16) | getuid ();
3996 }
3997
3998 int
3999 sys_read (fildes, buf, nbyte)
4000 int fildes;
4001 char *buf;
4002 unsigned int nbyte;
4003 {
4004 return read (fildes, buf, (nbyte < MAXIOSIZE ? nbyte : MAXIOSIZE));
4005 }
4006
4007 #if 0
4008 int
4009 sys_write (fildes, buf, nbyte)
4010 int fildes;
4011 char *buf;
4012 unsigned int nbyte;
4013 {
4014 register int nwrote, rtnval = 0;
4015
4016 while (nbyte > MAXIOSIZE && (nwrote = write (fildes, buf, MAXIOSIZE)) > 0) {
4017 nbyte -= nwrote;
4018 buf += nwrote;
4019 rtnval += nwrote;
4020 }
4021 if (nwrote < 0)
4022 return rtnval ? rtnval : -1;
4023 if ((nwrote = write (fildes, buf, nbyte)) < 0)
4024 return rtnval ? rtnval : -1;
4025 return (rtnval + nwrote);
4026 }
4027 #endif /* 0 */
4028
4029 /*
4030 * VAX/VMS VAX C RTL really loses. It insists that records
4031 * end with a newline (carriage return) character, and if they
4032 * don't it adds one (nice of it isn't it!)
4033 *
4034 * Thus we do this stupidity below.
4035 */
4036
4037 int
4038 sys_write (fildes, buf, nbytes)
4039 int fildes;
4040 char *buf;
4041 unsigned int nbytes;
4042 {
4043 register char *p;
4044 register char *e;
4045 int sum = 0;
4046 struct stat st;
4047
4048 fstat (fildes, &st);
4049 p = buf;
4050 while (nbytes > 0)
4051 {
4052 int len, retval;
4053
4054 /* Handle fixed-length files with carriage control. */
4055 if (st.st_fab_rfm == FAB$C_FIX
4056 && ((st.st_fab_rat & (FAB$M_FTN | FAB$M_CR)) != 0))
4057 {
4058 len = st.st_fab_mrs;
4059 retval = write (fildes, p, min (len, nbytes));
4060 if (retval != len)
4061 return -1;
4062 retval++; /* This skips the implied carriage control */
4063 }
4064 else
4065 {
4066 e = p + min (MAXIOSIZE, nbytes) - 1;
4067 while (*e != '\n' && e > p) e--;
4068 if (p == e) /* Ok.. so here we add a newline... sigh. */
4069 e = p + min (MAXIOSIZE, nbytes) - 1;
4070 len = e + 1 - p;
4071 retval = write (fildes, p, len);
4072 if (retval != len)
4073 return -1;
4074 }
4075 p += retval;
4076 sum += retval;
4077 nbytes -= retval;
4078 }
4079 return sum;
4080 }
4081
4082 /* Create file NEW copying its attributes from file OLD. If
4083 OLD is 0 or does not exist, create based on the value of
4084 vms_stmlf_recfm. */
4085
4086 /* Protection value the file should ultimately have.
4087 Set by create_copy_attrs, and use by rename_sansversions. */
4088 static unsigned short int fab_final_pro;
4089
4090 int
4091 creat_copy_attrs (old, new)
4092 char *old, *new;
4093 {
4094 struct FAB fab = cc$rms_fab;
4095 struct XABPRO xabpro;
4096 char aclbuf[256]; /* Choice of size is arbitrary. See below. */
4097 extern int vms_stmlf_recfm;
4098
4099 if (old)
4100 {
4101 fab.fab$b_fac = FAB$M_GET;
4102 fab.fab$l_fna = old;
4103 fab.fab$b_fns = strlen (old);
4104 fab.fab$l_xab = (char *) &xabpro;
4105 xabpro = cc$rms_xabpro;
4106 xabpro.xab$l_aclbuf = aclbuf;
4107 xabpro.xab$w_aclsiz = sizeof aclbuf;
4108 /* Call $OPEN to fill in the fab & xabpro fields. */
4109 if (SYS$OPEN (&fab, 0, 0) & 1)
4110 {
4111 SYS$CLOSE (&fab, 0, 0);
4112 fab.fab$l_alq = 0; /* zero the allocation quantity */
4113 if (xabpro.xab$w_acllen > 0)
4114 {
4115 if (xabpro.xab$w_acllen > sizeof aclbuf)
4116 /* If the acl buffer was too short, redo open with longer one.
4117 Wouldn't need to do this if there were some system imposed
4118 limit on the size of an ACL, but I can't find any such. */
4119 {
4120 xabpro.xab$l_aclbuf = (char *) alloca (xabpro.xab$w_acllen);
4121 xabpro.xab$w_aclsiz = xabpro.xab$w_acllen;
4122 if (SYS$OPEN (&fab, 0, 0) & 1)
4123 SYS$CLOSE (&fab, 0, 0);
4124 else
4125 old = 0;
4126 }
4127 }
4128 else
4129 xabpro.xab$l_aclbuf = 0;
4130 }
4131 else
4132 old = 0;
4133 }
4134 fab.fab$l_fna = new;
4135 fab.fab$b_fns = strlen (new);
4136 if (!old)
4137 {
4138 fab.fab$l_xab = 0;
4139 fab.fab$b_rfm = vms_stmlf_recfm ? FAB$C_STMLF : FAB$C_VAR;
4140 fab.fab$b_rat = FAB$M_CR;
4141 }
4142
4143 /* Set the file protections such that we will be able to manipulate
4144 this file. Once we are done writing and renaming it, we will set
4145 the protections back. */
4146 if (old)
4147 fab_final_pro = xabpro.xab$w_pro;
4148 else
4149 SYS$SETDFPROT (0, &fab_final_pro);
4150 xabpro.xab$w_pro &= 0xff0f; /* set O:rewd for now. This is set back later. */
4151
4152 /* Create the new file with either default attrs or attrs copied
4153 from old file. */
4154 if (!(SYS$CREATE (&fab, 0, 0) & 1))
4155 return -1;
4156 SYS$CLOSE (&fab, 0, 0);
4157 /* As this is a "replacement" for creat, return a file descriptor
4158 opened for writing. */
4159 return open (new, O_WRONLY);
4160 }
4161
4162 #ifdef creat
4163 #undef creat
4164 #include <varargs.h>
4165 #ifdef __GNUC__
4166 #ifndef va_count
4167 #define va_count(X) ((X) = *(((int *) &(va_alist)) - 1))
4168 #endif
4169 #endif
4170
4171 sys_creat (va_alist)
4172 va_dcl
4173 {
4174 va_list list_incrementer;
4175 char *name;
4176 int mode;
4177 int rfd; /* related file descriptor */
4178 int fd; /* Our new file descriptor */
4179 int count;
4180 struct stat st_buf;
4181 char rfm[12];
4182 char rat[15];
4183 char mrs[13];
4184 char fsz[13];
4185 extern int vms_stmlf_recfm;
4186
4187 va_count (count);
4188 va_start (list_incrementer);
4189 name = va_arg (list_incrementer, char *);
4190 mode = va_arg (list_incrementer, int);
4191 if (count > 2)
4192 rfd = va_arg (list_incrementer, int);
4193 va_end (list_incrementer);
4194 if (count > 2)
4195 {
4196 /* Use information from the related file descriptor to set record
4197 format of the newly created file. */
4198 fstat (rfd, &st_buf);
4199 switch (st_buf.st_fab_rfm)
4200 {
4201 case FAB$C_FIX:
4202 strcpy (rfm, "rfm = fix");
4203 sprintf (mrs, "mrs = %d", st_buf.st_fab_mrs);
4204 strcpy (rat, "rat = ");
4205 if (st_buf.st_fab_rat & FAB$M_CR)
4206 strcat (rat, "cr");
4207 else if (st_buf.st_fab_rat & FAB$M_FTN)
4208 strcat (rat, "ftn");
4209 else if (st_buf.st_fab_rat & FAB$M_PRN)
4210 strcat (rat, "prn");
4211 if (st_buf.st_fab_rat & FAB$M_BLK)
4212 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4213 strcat (rat, ", blk");
4214 else
4215 strcat (rat, "blk");
4216 return creat (name, 0, rfm, rat, mrs);
4217
4218 case FAB$C_VFC:
4219 strcpy (rfm, "rfm = vfc");
4220 sprintf (fsz, "fsz = %d", st_buf.st_fab_fsz);
4221 strcpy (rat, "rat = ");
4222 if (st_buf.st_fab_rat & FAB$M_CR)
4223 strcat (rat, "cr");
4224 else if (st_buf.st_fab_rat & FAB$M_FTN)
4225 strcat (rat, "ftn");
4226 else if (st_buf.st_fab_rat & FAB$M_PRN)
4227 strcat (rat, "prn");
4228 if (st_buf.st_fab_rat & FAB$M_BLK)
4229 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4230 strcat (rat, ", blk");
4231 else
4232 strcat (rat, "blk");
4233 return creat (name, 0, rfm, rat, fsz);
4234
4235 case FAB$C_STM:
4236 strcpy (rfm, "rfm = stm");
4237 break;
4238
4239 case FAB$C_STMCR:
4240 strcpy (rfm, "rfm = stmcr");
4241 break;
4242
4243 case FAB$C_STMLF:
4244 strcpy (rfm, "rfm = stmlf");
4245 break;
4246
4247 case FAB$C_UDF:
4248 strcpy (rfm, "rfm = udf");
4249 break;
4250
4251 case FAB$C_VAR:
4252 strcpy (rfm, "rfm = var");
4253 break;
4254 }
4255 strcpy (rat, "rat = ");
4256 if (st_buf.st_fab_rat & FAB$M_CR)
4257 strcat (rat, "cr");
4258 else if (st_buf.st_fab_rat & FAB$M_FTN)
4259 strcat (rat, "ftn");
4260 else if (st_buf.st_fab_rat & FAB$M_PRN)
4261 strcat (rat, "prn");
4262 if (st_buf.st_fab_rat & FAB$M_BLK)
4263 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4264 strcat (rat, ", blk");
4265 else
4266 strcat (rat, "blk");
4267 }
4268 else
4269 {
4270 strcpy (rfm, vms_stmlf_recfm ? "rfm = stmlf" : "rfm=var");
4271 strcpy (rat, "rat=cr");
4272 }
4273 /* Until the VAX C RTL fixes the many bugs with modes, always use
4274 mode 0 to get the user's default protection. */
4275 fd = creat (name, 0, rfm, rat);
4276 if (fd < 0 && errno == EEXIST)
4277 {
4278 if (unlink (name) < 0)
4279 report_file_error ("delete", build_string (name));
4280 fd = creat (name, 0, rfm, rat);
4281 }
4282 return fd;
4283 }
4284 #endif /* creat */
4285
4286 /* fwrite to stdout is S L O W. Speed it up by using fputc...*/
4287 sys_fwrite (ptr, size, num, fp)
4288 register char * ptr;
4289 FILE * fp;
4290 {
4291 register int tot = num * size;
4292
4293 while (tot--)
4294 fputc (*ptr++, fp);
4295 }
4296
4297 /*
4298 * The VMS C library routine creat actually creates a new version of an
4299 * existing file rather than truncating the old version. There are times
4300 * when this is not the desired behavior, for instance, when writing an
4301 * auto save file (you only want one version), or when you don't have
4302 * write permission in the directory containing the file (but the file
4303 * itself is writable). Hence this routine, which is equivalent to
4304 * "close (creat (fn, 0));" on Unix if fn already exists.
4305 */
4306 int
4307 vms_truncate (fn)
4308 char *fn;
4309 {
4310 struct FAB xfab = cc$rms_fab;
4311 struct RAB xrab = cc$rms_rab;
4312 int status;
4313
4314 xfab.fab$l_fop = FAB$M_TEF; /* free allocated but unused blocks on close */
4315 xfab.fab$b_fac = FAB$M_TRN | FAB$M_GET; /* allow truncate and get access */
4316 xfab.fab$b_shr = FAB$M_NIL; /* allow no sharing - file must be locked */
4317 xfab.fab$l_fna = fn;
4318 xfab.fab$b_fns = strlen (fn);
4319 xfab.fab$l_dna = ";0"; /* default to latest version of the file */
4320 xfab.fab$b_dns = 2;
4321 xrab.rab$l_fab = &xfab;
4322
4323 /* This gibberish opens the file, positions to the first record, and
4324 deletes all records from there until the end of file. */
4325 if ((SYS$OPEN (&xfab) & 01) == 01)
4326 {
4327 if ((SYS$CONNECT (&xrab) & 01) == 01 &&
4328 (SYS$FIND (&xrab) & 01) == 01 &&
4329 (SYS$TRUNCATE (&xrab) & 01) == 01)
4330 status = 0;
4331 else
4332 status = -1;
4333 }
4334 else
4335 status = -1;
4336 SYS$CLOSE (&xfab);
4337 return status;
4338 }
4339
4340 /* Define this symbol to actually read SYSUAF.DAT. This requires either
4341 SYSPRV or a readable SYSUAF.DAT. */
4342
4343 #ifdef READ_SYSUAF
4344 /*
4345 * getuaf.c
4346 *
4347 * Routine to read the VMS User Authorization File and return
4348 * a specific user's record.
4349 */
4350
4351 static struct UAF retuaf;
4352
4353 struct UAF *
4354 get_uaf_name (uname)
4355 char * uname;
4356 {
4357 register status;
4358 struct FAB uaf_fab;
4359 struct RAB uaf_rab;
4360
4361 uaf_fab = cc$rms_fab;
4362 uaf_rab = cc$rms_rab;
4363 /* initialize fab fields */
4364 uaf_fab.fab$l_fna = "SYS$SYSTEM:SYSUAF.DAT";
4365 uaf_fab.fab$b_fns = 21;
4366 uaf_fab.fab$b_fac = FAB$M_GET;
4367 uaf_fab.fab$b_org = FAB$C_IDX;
4368 uaf_fab.fab$b_shr = FAB$M_GET|FAB$M_PUT|FAB$M_UPD|FAB$M_DEL;
4369 /* initialize rab fields */
4370 uaf_rab.rab$l_fab = &uaf_fab;
4371 /* open the User Authorization File */
4372 status = SYS$OPEN (&uaf_fab);
4373 if (!(status&1))
4374 {
4375 errno = EVMSERR;
4376 vaxc$errno = status;
4377 return 0;
4378 }
4379 status = SYS$CONNECT (&uaf_rab);
4380 if (!(status&1))
4381 {
4382 errno = EVMSERR;
4383 vaxc$errno = status;
4384 return 0;
4385 }
4386 /* read the requested record - index is in uname */
4387 uaf_rab.rab$l_kbf = uname;
4388 uaf_rab.rab$b_ksz = strlen (uname);
4389 uaf_rab.rab$b_rac = RAB$C_KEY;
4390 uaf_rab.rab$l_ubf = (char *)&retuaf;
4391 uaf_rab.rab$w_usz = sizeof retuaf;
4392 status = SYS$GET (&uaf_rab);
4393 if (!(status&1))
4394 {
4395 errno = EVMSERR;
4396 vaxc$errno = status;
4397 return 0;
4398 }
4399 /* close the User Authorization File */
4400 status = SYS$DISCONNECT (&uaf_rab);
4401 if (!(status&1))
4402 {
4403 errno = EVMSERR;
4404 vaxc$errno = status;
4405 return 0;
4406 }
4407 status = SYS$CLOSE (&uaf_fab);
4408 if (!(status&1))
4409 {
4410 errno = EVMSERR;
4411 vaxc$errno = status;
4412 return 0;
4413 }
4414 return &retuaf;
4415 }
4416
4417 struct UAF *
4418 get_uaf_uic (uic)
4419 unsigned long uic;
4420 {
4421 register status;
4422 struct FAB uaf_fab;
4423 struct RAB uaf_rab;
4424
4425 uaf_fab = cc$rms_fab;
4426 uaf_rab = cc$rms_rab;
4427 /* initialize fab fields */
4428 uaf_fab.fab$l_fna = "SYS$SYSTEM:SYSUAF.DAT";
4429 uaf_fab.fab$b_fns = 21;
4430 uaf_fab.fab$b_fac = FAB$M_GET;
4431 uaf_fab.fab$b_org = FAB$C_IDX;
4432 uaf_fab.fab$b_shr = FAB$M_GET|FAB$M_PUT|FAB$M_UPD|FAB$M_DEL;
4433 /* initialize rab fields */
4434 uaf_rab.rab$l_fab = &uaf_fab;
4435 /* open the User Authorization File */
4436 status = SYS$OPEN (&uaf_fab);
4437 if (!(status&1))
4438 {
4439 errno = EVMSERR;
4440 vaxc$errno = status;
4441 return 0;
4442 }
4443 status = SYS$CONNECT (&uaf_rab);
4444 if (!(status&1))
4445 {
4446 errno = EVMSERR;
4447 vaxc$errno = status;
4448 return 0;
4449 }
4450 /* read the requested record - index is in uic */
4451 uaf_rab.rab$b_krf = 1; /* 1st alternate key */
4452 uaf_rab.rab$l_kbf = (char *) &uic;
4453 uaf_rab.rab$b_ksz = sizeof uic;
4454 uaf_rab.rab$b_rac = RAB$C_KEY;
4455 uaf_rab.rab$l_ubf = (char *)&retuaf;
4456 uaf_rab.rab$w_usz = sizeof retuaf;
4457 status = SYS$GET (&uaf_rab);
4458 if (!(status&1))
4459 {
4460 errno = EVMSERR;
4461 vaxc$errno = status;
4462 return 0;
4463 }
4464 /* close the User Authorization File */
4465 status = SYS$DISCONNECT (&uaf_rab);
4466 if (!(status&1))
4467 {
4468 errno = EVMSERR;
4469 vaxc$errno = status;
4470 return 0;
4471 }
4472 status = SYS$CLOSE (&uaf_fab);
4473 if (!(status&1))
4474 {
4475 errno = EVMSERR;
4476 vaxc$errno = status;
4477 return 0;
4478 }
4479 return &retuaf;
4480 }
4481
4482 static struct passwd retpw;
4483
4484 struct passwd *
4485 cnv_uaf_pw (up)
4486 struct UAF * up;
4487 {
4488 char * ptr;
4489
4490 /* copy these out first because if the username is 32 chars, the next
4491 section will overwrite the first byte of the UIC */
4492 retpw.pw_uid = up->uaf$w_mem;
4493 retpw.pw_gid = up->uaf$w_grp;
4494
4495 /* I suppose this is not the best sytle, to possibly overwrite one
4496 byte beyond the end of the field, but what the heck... */
4497 ptr = &up->uaf$t_username[UAF$S_USERNAME];
4498 while (ptr[-1] == ' ')
4499 ptr--;
4500 *ptr = '\0';
4501 strcpy (retpw.pw_name, up->uaf$t_username);
4502
4503 /* the rest of these are counted ascii strings */
4504 strncpy (retpw.pw_gecos, &up->uaf$t_owner[1], up->uaf$t_owner[0]);
4505 retpw.pw_gecos[up->uaf$t_owner[0]] = '\0';
4506 strncpy (retpw.pw_dir, &up->uaf$t_defdev[1], up->uaf$t_defdev[0]);
4507 retpw.pw_dir[up->uaf$t_defdev[0]] = '\0';
4508 strncat (retpw.pw_dir, &up->uaf$t_defdir[1], up->uaf$t_defdir[0]);
4509 retpw.pw_dir[up->uaf$t_defdev[0] + up->uaf$t_defdir[0]] = '\0';
4510 strncpy (retpw.pw_shell, &up->uaf$t_defcli[1], up->uaf$t_defcli[0]);
4511 retpw.pw_shell[up->uaf$t_defcli[0]] = '\0';
4512
4513 return &retpw;
4514 }
4515 #else /* not READ_SYSUAF */
4516 static struct passwd retpw;
4517 #endif /* not READ_SYSUAF */
4518
4519 struct passwd *
4520 getpwnam (name)
4521 char * name;
4522 {
4523 #ifdef READ_SYSUAF
4524 struct UAF *up;
4525 #else
4526 char * user;
4527 char * dir;
4528 unsigned char * full;
4529 #endif /* READ_SYSUAF */
4530 char *ptr = name;
4531
4532 while (*ptr)
4533 {
4534 if ('a' <= *ptr && *ptr <= 'z')
4535 *ptr -= 040;
4536 ptr++;
4537 }
4538 #ifdef READ_SYSUAF
4539 if (!(up = get_uaf_name (name)))
4540 return 0;
4541 return cnv_uaf_pw (up);
4542 #else
4543 if (strcmp (name, getenv ("USER")) == 0)
4544 {
4545 retpw.pw_uid = getuid ();
4546 retpw.pw_gid = getgid ();
4547 strcpy (retpw.pw_name, name);
4548 if (full = egetenv ("FULLNAME"))
4549 strcpy (retpw.pw_gecos, full);
4550 else
4551 *retpw.pw_gecos = '\0';
4552 strcpy (retpw.pw_dir, egetenv ("HOME"));
4553 *retpw.pw_shell = '\0';
4554 return &retpw;
4555 }
4556 else
4557 return 0;
4558 #endif /* not READ_SYSUAF */
4559 }
4560
4561 struct passwd *
4562 getpwuid (uid)
4563 unsigned long uid;
4564 {
4565 #ifdef READ_SYSUAF
4566 struct UAF * up;
4567
4568 if (!(up = get_uaf_uic (uid)))
4569 return 0;
4570 return cnv_uaf_pw (up);
4571 #else
4572 if (uid == sys_getuid ())
4573 return getpwnam (egetenv ("USER"));
4574 else
4575 return 0;
4576 #endif /* not READ_SYSUAF */
4577 }
4578
4579 /* return total address space available to the current process. This is
4580 the sum of the current p0 size, p1 size and free page table entries
4581 available. */
4582 vlimit ()
4583 {
4584 int item_code;
4585 unsigned long free_pages;
4586 unsigned long frep0va;
4587 unsigned long frep1va;
4588 register status;
4589
4590 item_code = JPI$_FREPTECNT;
4591 if (((status = LIB$GETJPI (&item_code, 0, 0, &free_pages)) & 1) == 0)
4592 {
4593 errno = EVMSERR;
4594 vaxc$errno = status;
4595 return -1;
4596 }
4597 free_pages *= 512;
4598
4599 item_code = JPI$_FREP0VA;
4600 if (((status = LIB$GETJPI (&item_code, 0, 0, &frep0va)) & 1) == 0)
4601 {
4602 errno = EVMSERR;
4603 vaxc$errno = status;
4604 return -1;
4605 }
4606 item_code = JPI$_FREP1VA;
4607 if (((status = LIB$GETJPI (&item_code, 0, 0, &frep1va)) & 1) == 0)
4608 {
4609 errno = EVMSERR;
4610 vaxc$errno = status;
4611 return -1;
4612 }
4613
4614 return free_pages + frep0va + (0x7fffffff - frep1va);
4615 }
4616
4617 define_logical_name (varname, string)
4618 char *varname;
4619 char *string;
4620 {
4621 struct dsc$descriptor_s strdsc =
4622 {strlen (string), DSC$K_DTYPE_T, DSC$K_CLASS_S, string};
4623 struct dsc$descriptor_s envdsc =
4624 {strlen (varname), DSC$K_DTYPE_T, DSC$K_CLASS_S, varname};
4625 struct dsc$descriptor_s lnmdsc =
4626 {7, DSC$K_DTYPE_T, DSC$K_CLASS_S, "LNM$JOB"};
4627
4628 return LIB$SET_LOGICAL (&envdsc, &strdsc, &lnmdsc, 0, 0);
4629 }
4630
4631 delete_logical_name (varname)
4632 char *varname;
4633 {
4634 struct dsc$descriptor_s envdsc =
4635 {strlen (varname), DSC$K_DTYPE_T, DSC$K_CLASS_S, varname};
4636 struct dsc$descriptor_s lnmdsc =
4637 {7, DSC$K_DTYPE_T, DSC$K_CLASS_S, "LNM$JOB"};
4638
4639 return LIB$DELETE_LOGICAL (&envdsc, &lnmdsc);
4640 }
4641
4642 ulimit ()
4643 {}
4644
4645 setpgrp ()
4646 {}
4647
4648 execvp ()
4649 {
4650 error ("execvp system call not implemented");
4651 }
4652
4653 int
4654 rename (from, to)
4655 char *from, *to;
4656 {
4657 int status;
4658 struct FAB from_fab = cc$rms_fab, to_fab = cc$rms_fab;
4659 struct NAM from_nam = cc$rms_nam, to_nam = cc$rms_nam;
4660 char from_esn[NAM$C_MAXRSS];
4661 char to_esn[NAM$C_MAXRSS];
4662
4663 from_fab.fab$l_fna = from;
4664 from_fab.fab$b_fns = strlen (from);
4665 from_fab.fab$l_nam = &from_nam;
4666 from_fab.fab$l_fop = FAB$M_NAM;
4667
4668 from_nam.nam$l_esa = from_esn;
4669 from_nam.nam$b_ess = sizeof from_esn;
4670
4671 to_fab.fab$l_fna = to;
4672 to_fab.fab$b_fns = strlen (to);
4673 to_fab.fab$l_nam = &to_nam;
4674 to_fab.fab$l_fop = FAB$M_NAM;
4675
4676 to_nam.nam$l_esa = to_esn;
4677 to_nam.nam$b_ess = sizeof to_esn;
4678
4679 status = SYS$RENAME (&from_fab, 0, 0, &to_fab);
4680
4681 if (status & 1)
4682 return 0;
4683 else
4684 {
4685 if (status == RMS$_DEV)
4686 errno = EXDEV;
4687 else
4688 errno = EVMSERR;
4689 vaxc$errno = status;
4690 return -1;
4691 }
4692 }
4693
4694 /* This function renames a file like `rename', but it strips
4695 the version number from the "to" filename, such that the "to" file is
4696 will always be a new version. It also sets the file protection once it is
4697 finished. The protection that we will use is stored in fab_final_pro,
4698 and was set when we did a creat_copy_attrs to create the file that we
4699 are renaming.
4700
4701 We could use the chmod function, but Eunichs uses 3 bits per user category
4702 to describe the protection, and VMS uses 4 (write and delete are separate
4703 bits). To maintain portability, the VMS implementation of `chmod' wires
4704 the W and D bits together. */
4705
4706
4707 static struct fibdef fib; /* We need this initialized to zero */
4708 char vms_file_written[NAM$C_MAXRSS];
4709
4710 int
4711 rename_sans_version (from,to)
4712 char *from, *to;
4713 {
4714 short int chan;
4715 int stat;
4716 short int iosb[4];
4717 int status;
4718 struct FAB to_fab = cc$rms_fab;
4719 struct NAM to_nam = cc$rms_nam;
4720 struct dsc$descriptor fib_d ={sizeof (fib),0,0,(char*) &fib};
4721 struct dsc$descriptor fib_attr[2]
4722 = {{sizeof (fab_final_pro),ATR$C_FPRO,0,(char*) &fab_final_pro},{0,0,0,0}};
4723 char to_esn[NAM$C_MAXRSS];
4724
4725 $DESCRIPTOR (disk,to_esn);
4726
4727 to_fab.fab$l_fna = to;
4728 to_fab.fab$b_fns = strlen (to);
4729 to_fab.fab$l_nam = &to_nam;
4730 to_fab.fab$l_fop = FAB$M_NAM;
4731
4732 to_nam.nam$l_esa = to_esn;
4733 to_nam.nam$b_ess = sizeof to_esn;
4734
4735 status = SYS$PARSE (&to_fab, 0, 0); /* figure out the full file name */
4736
4737 if (to_nam.nam$l_fnb && NAM$M_EXP_VER)
4738 *(to_nam.nam$l_ver) = '\0';
4739
4740 stat = rename (from, to_esn);
4741 if (stat < 0)
4742 return stat;
4743
4744 strcpy (vms_file_written, to_esn);
4745
4746 to_fab.fab$l_fna = vms_file_written; /* this points to the versionless name */
4747 to_fab.fab$b_fns = strlen (vms_file_written);
4748
4749 /* Now set the file protection to the correct value */
4750 SYS$OPEN (&to_fab, 0, 0); /* This fills in the nam$w_fid fields */
4751
4752 /* Copy these fields into the fib */
4753 fib.fib$r_fid_overlay.fib$w_fid[0] = to_nam.nam$w_fid[0];
4754 fib.fib$r_fid_overlay.fib$w_fid[1] = to_nam.nam$w_fid[1];
4755 fib.fib$r_fid_overlay.fib$w_fid[2] = to_nam.nam$w_fid[2];
4756
4757 SYS$CLOSE (&to_fab, 0, 0);
4758
4759 stat = SYS$ASSIGN (&disk, &chan, 0, 0); /* open a channel to the disk */
4760 if (!stat)
4761 LIB$SIGNAL (stat);
4762 stat = SYS$QIOW (0, chan, IO$_MODIFY, iosb, 0, 0, &fib_d,
4763 0, 0, 0, &fib_attr, 0);
4764 if (!stat)
4765 LIB$SIGNAL (stat);
4766 stat = SYS$DASSGN (chan);
4767 if (!stat)
4768 LIB$SIGNAL (stat);
4769 strcpy (vms_file_written, to_esn); /* We will write this to the terminal*/
4770 return 0;
4771 }
4772
4773 link (file, new)
4774 char * file, * new;
4775 {
4776 register status;
4777 struct FAB fab;
4778 struct NAM nam;
4779 unsigned short fid[3];
4780 char esa[NAM$C_MAXRSS];
4781
4782 fab = cc$rms_fab;
4783 fab.fab$l_fop = FAB$M_OFP;
4784 fab.fab$l_fna = file;
4785 fab.fab$b_fns = strlen (file);
4786 fab.fab$l_nam = &nam;
4787
4788 nam = cc$rms_nam;
4789 nam.nam$l_esa = esa;
4790 nam.nam$b_ess = NAM$C_MAXRSS;
4791
4792 status = SYS$PARSE (&fab);
4793 if ((status & 1) == 0)
4794 {
4795 errno = EVMSERR;
4796 vaxc$errno = status;
4797 return -1;
4798 }
4799 status = SYS$SEARCH (&fab);
4800 if ((status & 1) == 0)
4801 {
4802 errno = EVMSERR;
4803 vaxc$errno = status;
4804 return -1;
4805 }
4806
4807 fid[0] = nam.nam$w_fid[0];
4808 fid[1] = nam.nam$w_fid[1];
4809 fid[2] = nam.nam$w_fid[2];
4810
4811 fab.fab$l_fna = new;
4812 fab.fab$b_fns = strlen (new);
4813
4814 status = SYS$PARSE (&fab);
4815 if ((status & 1) == 0)
4816 {
4817 errno = EVMSERR;
4818 vaxc$errno = status;
4819 return -1;
4820 }
4821
4822 nam.nam$w_fid[0] = fid[0];
4823 nam.nam$w_fid[1] = fid[1];
4824 nam.nam$w_fid[2] = fid[2];
4825
4826 nam.nam$l_esa = nam.nam$l_name;
4827 nam.nam$b_esl = nam.nam$b_name + nam.nam$b_type + nam.nam$b_ver;
4828
4829 status = SYS$ENTER (&fab);
4830 if ((status & 1) == 0)
4831 {
4832 errno = EVMSERR;
4833 vaxc$errno = status;
4834 return -1;
4835 }
4836
4837 return 0;
4838 }
4839
4840 croak (badfunc)
4841 char *badfunc;
4842 {
4843 printf ("%s not yet implemented\r\n", badfunc);
4844 reset_sys_modes ();
4845 exit (1);
4846 }
4847
4848 long
4849 random ()
4850 {
4851 /* Arrange to return a range centered on zero. */
4852 return rand () - (1 << 30);
4853 }
4854
4855 srandom (seed)
4856 {
4857 srand (seed);
4858 }
4859 #endif /* VMS */
4860 \f
4861 #ifdef AIXHFT
4862
4863 /* Called from init_sys_modes. */
4864 hft_init ()
4865 {
4866 int junk;
4867
4868 /* If we're not on an HFT we shouldn't do any of this. We determine
4869 if we are on an HFT by trying to get an HFT error code. If this
4870 call fails, we're not on an HFT. */
4871 #ifdef IBMR2AIX
4872 if (ioctl (0, HFQERROR, &junk) < 0)
4873 return;
4874 #else /* not IBMR2AIX */
4875 if (ioctl (0, HFQEIO, 0) < 0)
4876 return;
4877 #endif /* not IBMR2AIX */
4878
4879 /* On AIX the default hft keyboard mapping uses backspace rather than delete
4880 as the rubout key's ASCII code. Here this is changed. The bug is that
4881 there's no way to determine the old mapping, so in reset_sys_modes
4882 we need to assume that the normal map had been present. Of course, this
4883 code also doesn't help if on a terminal emulator which doesn't understand
4884 HFT VTD's. */
4885 {
4886 struct hfbuf buf;
4887 struct hfkeymap keymap;
4888
4889 buf.hf_bufp = (char *)&keymap;
4890 buf.hf_buflen = sizeof (keymap);
4891 keymap.hf_nkeys = 2;
4892 keymap.hfkey[0].hf_kpos = 15;
4893 keymap.hfkey[0].hf_kstate = HFMAPCHAR | HFSHFNONE;
4894 #ifdef IBMR2AIX
4895 keymap.hfkey[0].hf_keyidh = '<';
4896 #else /* not IBMR2AIX */
4897 keymap.hfkey[0].hf_page = '<';
4898 #endif /* not IBMR2AIX */
4899 keymap.hfkey[0].hf_char = 127;
4900 keymap.hfkey[1].hf_kpos = 15;
4901 keymap.hfkey[1].hf_kstate = HFMAPCHAR | HFSHFSHFT;
4902 #ifdef IBMR2AIX
4903 keymap.hfkey[1].hf_keyidh = '<';
4904 #else /* not IBMR2AIX */
4905 keymap.hfkey[1].hf_page = '<';
4906 #endif /* not IBMR2AIX */
4907 keymap.hfkey[1].hf_char = 127;
4908 hftctl (0, HFSKBD, &buf);
4909 }
4910 /* The HFT system on AIX doesn't optimize for scrolling, so it's really ugly
4911 at times. */
4912 line_ins_del_ok = char_ins_del_ok = 0;
4913 }
4914
4915 /* Reset the rubout key to backspace. */
4916
4917 hft_reset ()
4918 {
4919 struct hfbuf buf;
4920 struct hfkeymap keymap;
4921 int junk;
4922
4923 #ifdef IBMR2AIX
4924 if (ioctl (0, HFQERROR, &junk) < 0)
4925 return;
4926 #else /* not IBMR2AIX */
4927 if (ioctl (0, HFQEIO, 0) < 0)
4928 return;
4929 #endif /* not IBMR2AIX */
4930
4931 buf.hf_bufp = (char *)&keymap;
4932 buf.hf_buflen = sizeof (keymap);
4933 keymap.hf_nkeys = 2;
4934 keymap.hfkey[0].hf_kpos = 15;
4935 keymap.hfkey[0].hf_kstate = HFMAPCHAR | HFSHFNONE;
4936 #ifdef IBMR2AIX
4937 keymap.hfkey[0].hf_keyidh = '<';
4938 #else /* not IBMR2AIX */
4939 keymap.hfkey[0].hf_page = '<';
4940 #endif /* not IBMR2AIX */
4941 keymap.hfkey[0].hf_char = 8;
4942 keymap.hfkey[1].hf_kpos = 15;
4943 keymap.hfkey[1].hf_kstate = HFMAPCHAR | HFSHFSHFT;
4944 #ifdef IBMR2AIX
4945 keymap.hfkey[1].hf_keyidh = '<';
4946 #else /* not IBMR2AIX */
4947 keymap.hfkey[1].hf_page = '<';
4948 #endif /* not IBMR2AIX */
4949 keymap.hfkey[1].hf_char = 8;
4950 hftctl (0, HFSKBD, &buf);
4951 }
4952
4953 #endif /* AIXHFT */
4954
4955 #ifdef USE_DL_STUBS
4956
4957 /* These are included on Sunos 4.1 when we do not use shared libraries.
4958 X11 libraries may refer to these functions but (we hope) do not
4959 actually call them. */
4960
4961 void *
4962 dlopen ()
4963 {
4964 return 0;
4965 }
4966
4967 void *
4968 dlsym ()
4969 {
4970 return 0;
4971 }
4972
4973 int
4974 dlclose ()
4975 {
4976 return -1;
4977 }
4978
4979 #endif /* USE_DL_STUBS */
4980
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