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(sigprocmask_set): New variable.
[bpt/emacs.git] / src / sysdep.c
1 /* Interfaces to system-dependent kernel and library entries.
2 Copyright (C) 1985, 86,87,88,93,94,95, 1999 Free Software Foundation, Inc.
3
4 This file is part of GNU Emacs.
5
6 GNU Emacs is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
9 any later version.
10
11 GNU Emacs is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with GNU Emacs; see the file COPYING. If not, write to
18 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
20
21
22 #include <config.h>
23 #include <signal.h>
24 #include <setjmp.h>
25 #ifdef HAVE_UNISTD_H
26 #include <unistd.h>
27 #endif
28
29 #include "lisp.h"
30 #include "blockinput.h"
31 #undef NULL
32
33 #ifdef macintosh
34 #ifdef __MRC__
35 __sigfun sys_signal (int signal, __sigfun signal_func);
36 #elif __MWERKS__
37 __signal_func_ptr sys_signal (int signal, __signal_func_ptr signal_func);
38 #else
39 You lose!!!
40 #endif
41 #ifndef subprocesses
42 /* Nonzero means delete a process right away if it exits (process.c). */
43 static int delete_exited_processes;
44 #endif
45 #ifndef HAVE_X_WINDOWS
46 /* Search path for bitmap files (xfns.c). */
47 Lisp_Object Vx_bitmap_file_path;
48 #endif
49 #endif /* macintosh */
50
51 #define min(x,y) ((x) > (y) ? (y) : (x))
52
53 #ifdef WINDOWSNT
54 #define read sys_read
55 #define write sys_write
56 #include <windows.h>
57 extern int errno;
58 #endif /* not WINDOWSNT */
59
60 /* Does anyone other than VMS need this? */
61 #ifndef fwrite
62 #define sys_fwrite fwrite
63 #else
64 #undef fwrite
65 #endif
66
67 #ifndef HAVE_H_ERRNO
68 extern int h_errno;
69 #endif
70
71 #include <stdio.h>
72 #include <sys/types.h>
73 #include <sys/stat.h>
74 #include <errno.h>
75
76 /* Get _POSIX_VDISABLE, if it is available. */
77 #ifdef HAVE_UNISTD_H
78 #include <unistd.h>
79 #endif
80
81 #ifdef HAVE_STDLIB_H
82 #include <stdlib.h>
83 #endif
84
85 #ifdef HAVE_SETPGID
86 #if !defined (USG) || defined (BSD_PGRPS)
87 #define setpgrp setpgid
88 #endif
89 #endif
90
91 /* Get SI_SRPC_DOMAIN, if it is available. */
92 #ifdef HAVE_SYS_SYSTEMINFO_H
93 #include <sys/systeminfo.h>
94 #endif
95
96 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida, MW Aug 1993 */
97 #include <dos.h>
98 #include "dosfns.h"
99 #include "msdos.h"
100 #include <sys/param.h>
101
102 #if __DJGPP__ > 1
103 extern int etext;
104 extern unsigned start __asm__ ("start");
105 #endif
106 #endif
107
108 #ifndef errno
109 extern int errno;
110 #endif
111
112 #ifdef VMS
113 #include <rms.h>
114 #include <ttdef.h>
115 #include <tt2def.h>
116 #include <iodef.h>
117 #include <ssdef.h>
118 #include <descrip.h>
119 #include <fibdef.h>
120 #include <atrdef.h>
121 #include <ctype.h>
122 #include <string.h>
123 #ifdef __GNUC__
124 #include <sys/file.h>
125 #else
126 #include <file.h>
127 #endif
128 #undef F_SETFL
129 #ifndef RAB$C_BID
130 #include <rab.h>
131 #endif
132 #define MAXIOSIZE (32 * PAGESIZE) /* Don't I/O more than 32 blocks at a time */
133 #endif /* VMS */
134
135 #ifndef BSD4_1
136 #ifdef BSD_SYSTEM /* avoid writing defined (BSD_SYSTEM) || defined (USG)
137 because the vms compiler doesn't grok `defined' */
138 #include <fcntl.h>
139 #endif
140 #ifdef USG
141 #ifndef USG5
142 #include <fcntl.h>
143 #endif
144 #endif
145 #endif /* not 4.1 bsd */
146
147 #ifndef MSDOS
148 #include <sys/ioctl.h>
149 #endif
150
151 #include "systty.h"
152 #include "syswait.h"
153
154 #ifdef BROKEN_TIOCGWINSZ
155 #undef TIOCGWINSZ
156 #undef TIOCSWINSZ
157 #endif
158
159 #if defined (USG) || defined (DGUX)
160 #include <sys/utsname.h>
161 #include <string.h>
162 #ifndef MEMORY_IN_STRING_H
163 #include <memory.h>
164 #endif
165 #if defined (TIOCGWINSZ) || defined (ISC4_0)
166 #ifdef NEED_SIOCTL
167 #include <sys/sioctl.h>
168 #endif
169 #ifdef NEED_PTEM_H
170 #include <sys/stream.h>
171 #include <sys/ptem.h>
172 #endif
173 #endif /* TIOCGWINSZ or ISC4_0 */
174 #endif /* USG or DGUX */
175
176 extern int quit_char;
177
178 #include "frame.h"
179 #include "window.h"
180 #include "termhooks.h"
181 #include "termchar.h"
182 #include "termopts.h"
183 #include "dispextern.h"
184 #include "process.h"
185
186 #ifdef WINDOWSNT
187 #include <direct.h>
188 /* In process.h which conflicts with the local copy. */
189 #define _P_WAIT 0
190 int _CRTAPI1 _spawnlp (int, const char *, const char *, ...);
191 int _CRTAPI1 _getpid (void);
192 #endif
193
194 #ifdef NONSYSTEM_DIR_LIBRARY
195 #include "ndir.h"
196 #endif /* NONSYSTEM_DIR_LIBRARY */
197
198 #include "syssignal.h"
199 #include "systime.h"
200 #ifdef HAVE_UTIME_H
201 #include <utime.h>
202 #endif
203
204 #ifndef HAVE_UTIMES
205 #ifndef HAVE_STRUCT_UTIMBUF
206 /* We want to use utime rather than utimes, but we couldn't find the
207 structure declaration. We'll use the traditional one. */
208 struct utimbuf {
209 long actime;
210 long modtime;
211 };
212 #endif
213 #endif
214
215 /* LPASS8 is new in 4.3, and makes cbreak mode provide all 8 bits. */
216 #ifndef LPASS8
217 #define LPASS8 0
218 #endif
219
220 #ifdef BSD4_1
221 #define LNOFLSH 0100000
222 #endif
223
224 static int baud_convert[] =
225 #ifdef BAUD_CONVERT
226 BAUD_CONVERT;
227 #else
228 {
229 0, 50, 75, 110, 135, 150, 200, 300, 600, 1200,
230 1800, 2400, 4800, 9600, 19200, 38400
231 };
232 #endif
233
234 #ifdef HAVE_SPEED_T
235 #include <termios.h>
236 extern speed_t ospeed;
237 #else
238 #if defined (HAVE_LIBNCURSES) && ! defined (NCURSES_OSPEED_T)
239 extern short ospeed;
240 #else
241 #if defined (HAVE_TERMIOS_H) && defined (LINUX)
242 #include <termios.h>
243 /* HJL's version of libc is said to need this on the Alpha.
244 On the other hand, DEC OSF1 on the Alpha needs ospeed to be a short. */
245 extern speed_t ospeed;
246 #else
247 extern short ospeed;
248 #endif
249 #endif
250 #endif
251
252 /* The file descriptor for Emacs's input terminal.
253 Under Unix, this is normally zero except when using X;
254 under VMS, we place the input channel number here. */
255 int input_fd;
256
257 void croak P_ ((char *));
258
259 #ifdef AIXHFT
260 void hft_init ();
261 void hft_reset ();
262 #endif
263
264 /* Temporary used by `sigblock' when defined in terms of signprocmask. */
265
266 SIGMASKTYPE sigprocmask_set;
267
268 \f
269 /* Specify a different file descriptor for further input operations. */
270
271 void
272 change_input_fd (fd)
273 int fd;
274 {
275 input_fd = fd;
276 }
277
278 /* Discard pending input on descriptor input_fd. */
279
280 void
281 discard_tty_input ()
282 {
283 #ifndef WINDOWSNT
284 struct emacs_tty buf;
285
286 if (noninteractive)
287 return;
288
289 /* Discarding input is not safe when the input could contain
290 replies from the X server. So don't do it. */
291 if (read_socket_hook)
292 return;
293
294 #ifdef VMS
295 end_kbd_input ();
296 SYS$QIOW (0, input_fd, IO$_READVBLK|IO$M_PURGE, input_iosb, 0, 0,
297 &buf.main, 0, 0, terminator_mask, 0, 0);
298 queue_kbd_input ();
299 #else /* not VMS */
300 #ifdef APOLLO
301 {
302 int zero = 0;
303 ioctl (input_fd, TIOCFLUSH, &zero);
304 }
305 #else /* not Apollo */
306 #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */
307 while (dos_keyread () != -1)
308 ;
309 #else /* not MSDOS */
310 EMACS_GET_TTY (input_fd, &buf);
311 EMACS_SET_TTY (input_fd, &buf, 0);
312 #endif /* not MSDOS */
313 #endif /* not Apollo */
314 #endif /* not VMS */
315 #endif /* not WINDOWSNT */
316 }
317
318 #ifdef SIGTSTP
319
320 /* Arrange for character C to be read as the next input from
321 the terminal. */
322
323 void
324 stuff_char (c)
325 char c;
326 {
327 if (read_socket_hook)
328 return;
329
330 /* Should perhaps error if in batch mode */
331 #ifdef TIOCSTI
332 ioctl (input_fd, TIOCSTI, &c);
333 #else /* no TIOCSTI */
334 error ("Cannot stuff terminal input characters in this version of Unix");
335 #endif /* no TIOCSTI */
336 }
337
338 #endif /* SIGTSTP */
339 \f
340 void
341 init_baud_rate ()
342 {
343 if (noninteractive)
344 ospeed = 0;
345 else
346 {
347 #ifdef INIT_BAUD_RATE
348 INIT_BAUD_RATE ();
349 #else
350 #ifdef DOS_NT
351 ospeed = 15;
352 #else /* not DOS_NT */
353 #ifdef VMS
354 struct sensemode sg;
355
356 SYS$QIOW (0, input_fd, IO$_SENSEMODE, &sg, 0, 0,
357 &sg.class, 12, 0, 0, 0, 0 );
358 ospeed = sg.xmit_baud;
359 #else /* not VMS */
360 #ifdef HAVE_TERMIOS
361 struct termios sg;
362
363 sg.c_cflag = B9600;
364 tcgetattr (input_fd, &sg);
365 ospeed = cfgetospeed (&sg);
366 #if defined (USE_GETOBAUD) && defined (getobaud)
367 /* m88k-motorola-sysv3 needs this (ghazi@noc.rutgers.edu) 9/1/94. */
368 if (ospeed == 0)
369 ospeed = getobaud (sg.c_cflag);
370 #endif
371 #else /* neither VMS nor TERMIOS */
372 #ifdef HAVE_TERMIO
373 struct termio sg;
374
375 sg.c_cflag = B9600;
376 #ifdef HAVE_TCATTR
377 tcgetattr (input_fd, &sg);
378 #else
379 ioctl (input_fd, TCGETA, &sg);
380 #endif
381 ospeed = sg.c_cflag & CBAUD;
382 #else /* neither VMS nor TERMIOS nor TERMIO */
383 struct sgttyb sg;
384
385 sg.sg_ospeed = B9600;
386 if (ioctl (input_fd, TIOCGETP, &sg) < 0)
387 abort ();
388 ospeed = sg.sg_ospeed;
389 #endif /* not HAVE_TERMIO */
390 #endif /* not HAVE_TERMIOS */
391 #endif /* not VMS */
392 #endif /* not DOS_NT */
393 #endif /* not INIT_BAUD_RATE */
394 }
395
396 baud_rate = (ospeed < sizeof baud_convert / sizeof baud_convert[0]
397 ? baud_convert[ospeed] : 9600);
398 if (baud_rate == 0)
399 baud_rate = 1200;
400 }
401
402 /*ARGSUSED*/
403 void
404 set_exclusive_use (fd)
405 int fd;
406 {
407 #ifdef FIOCLEX
408 ioctl (fd, FIOCLEX, 0);
409 #endif
410 /* Ok to do nothing if this feature does not exist */
411 }
412 \f
413 #ifndef subprocesses
414
415 wait_without_blocking ()
416 {
417 #ifdef BSD_SYSTEM
418 wait3 (0, WNOHANG | WUNTRACED, 0);
419 #else
420 croak ("wait_without_blocking");
421 #endif
422 synch_process_alive = 0;
423 }
424
425 #endif /* not subprocesses */
426
427 int wait_debugging; /* Set nonzero to make following function work under dbx
428 (at least for bsd). */
429
430 SIGTYPE
431 wait_for_termination_signal ()
432 {}
433
434 /* Wait for subprocess with process id `pid' to terminate and
435 make sure it will get eliminated (not remain forever as a zombie) */
436
437 void
438 wait_for_termination (pid)
439 int pid;
440 {
441 while (1)
442 {
443 #ifdef subprocesses
444 #ifdef VMS
445 int status;
446
447 status = SYS$FORCEX (&pid, 0, 0);
448 break;
449 #else /* not VMS */
450 #if defined (BSD_SYSTEM) || (defined (HPUX) && !defined (HPUX_5))
451 /* Note that kill returns -1 even if the process is just a zombie now.
452 But inevitably a SIGCHLD interrupt should be generated
453 and child_sig will do wait3 and make the process go away. */
454 /* There is some indication that there is a bug involved with
455 termination of subprocesses, perhaps involving a kernel bug too,
456 but no idea what it is. Just as a hunch we signal SIGCHLD to see
457 if that causes the problem to go away or get worse. */
458 sigsetmask (sigmask (SIGCHLD));
459 if (0 > kill (pid, 0))
460 {
461 sigsetmask (SIGEMPTYMASK);
462 kill (getpid (), SIGCHLD);
463 break;
464 }
465 if (wait_debugging)
466 sleep (1);
467 else
468 sigpause (SIGEMPTYMASK);
469 #else /* not BSD_SYSTEM, and not HPUX version >= 6 */
470 #if defined (UNIPLUS)
471 if (0 > kill (pid, 0))
472 break;
473 wait (0);
474 #else /* neither BSD_SYSTEM nor UNIPLUS: random sysV */
475 #ifdef POSIX_SIGNALS /* would this work for LINUX as well? */
476 sigblock (sigmask (SIGCHLD));
477 if (0 > kill (pid, 0))
478 {
479 sigunblock (sigmask (SIGCHLD));
480 break;
481 }
482 sigpause (SIGEMPTYMASK);
483 #else /* not POSIX_SIGNALS */
484 #ifdef HAVE_SYSV_SIGPAUSE
485 sighold (SIGCHLD);
486 if (0 > kill (pid, 0))
487 {
488 sigrelse (SIGCHLD);
489 break;
490 }
491 sigpause (SIGCHLD);
492 #else /* not HAVE_SYSV_SIGPAUSE */
493 #ifdef WINDOWSNT
494 wait (0);
495 break;
496 #else /* not WINDOWSNT */
497 if (0 > kill (pid, 0))
498 break;
499 /* Using sleep instead of pause avoids timing error.
500 If the inferior dies just before the sleep,
501 we lose just one second. */
502 sleep (1);
503 #endif /* not WINDOWSNT */
504 #endif /* not HAVE_SYSV_SIGPAUSE */
505 #endif /* not POSIX_SIGNALS */
506 #endif /* not UNIPLUS */
507 #endif /* not BSD_SYSTEM, and not HPUX version >= 6 */
508 #endif /* not VMS */
509 #else /* not subprocesses */
510 #if __DJGPP__ > 1
511 break;
512 #else /* not __DJGPP__ > 1 */
513 #ifndef BSD4_1
514 if (kill (pid, 0) < 0)
515 break;
516 wait (0);
517 #else /* BSD4_1 */
518 int status;
519 status = wait (0);
520 if (status == pid || status == -1)
521 break;
522 #endif /* BSD4_1 */
523 #endif /* not __DJGPP__ > 1*/
524 #endif /* not subprocesses */
525 }
526 }
527
528 #ifdef subprocesses
529
530 /*
531 * flush any pending output
532 * (may flush input as well; it does not matter the way we use it)
533 */
534
535 void
536 flush_pending_output (channel)
537 int channel;
538 {
539 #ifdef HAVE_TERMIOS
540 /* If we try this, we get hit with SIGTTIN, because
541 the child's tty belongs to the child's pgrp. */
542 #else
543 #ifdef TCFLSH
544 ioctl (channel, TCFLSH, 1);
545 #else
546 #ifdef TIOCFLUSH
547 int zero = 0;
548 /* 3rd arg should be ignored
549 but some 4.2 kernels actually want the address of an int
550 and nonzero means something different. */
551 ioctl (channel, TIOCFLUSH, &zero);
552 #endif
553 #endif
554 #endif
555 }
556 \f
557 #ifndef VMS
558 /* Set up the terminal at the other end of a pseudo-terminal that
559 we will be controlling an inferior through.
560 It should not echo or do line-editing, since that is done
561 in Emacs. No padding needed for insertion into an Emacs buffer. */
562
563 void
564 child_setup_tty (out)
565 int out;
566 {
567 #ifndef DOS_NT
568 struct emacs_tty s;
569
570 EMACS_GET_TTY (out, &s);
571
572 #if defined (HAVE_TERMIO) || defined (HAVE_TERMIOS)
573 s.main.c_oflag |= OPOST; /* Enable output postprocessing */
574 s.main.c_oflag &= ~ONLCR; /* Disable map of NL to CR-NL on output */
575 #ifdef NLDLY
576 s.main.c_oflag &= ~(NLDLY|CRDLY|TABDLY|BSDLY|VTDLY|FFDLY);
577 /* No output delays */
578 #endif
579 s.main.c_lflag &= ~ECHO; /* Disable echo */
580 s.main.c_lflag |= ISIG; /* Enable signals */
581 #ifdef IUCLC
582 s.main.c_iflag &= ~IUCLC; /* Disable downcasing on input. */
583 #endif
584 #ifdef ISTRIP
585 s.main.c_iflag &= ~ISTRIP; /* don't strip 8th bit on input */
586 #endif
587 #ifdef OLCUC
588 s.main.c_oflag &= ~OLCUC; /* Disable upcasing on output. */
589 #endif
590 s.main.c_oflag &= ~TAB3; /* Disable tab expansion */
591 s.main.c_cflag = (s.main.c_cflag & ~CSIZE) | CS8; /* Don't strip 8th bit */
592 #if 0
593 /* Said to be unnecessary: */
594 s.main.c_cc[VMIN] = 1; /* minimum number of characters to accept */
595 s.main.c_cc[VTIME] = 0; /* wait forever for at least 1 character */
596 #endif
597
598 s.main.c_lflag |= ICANON; /* Enable erase/kill and eof processing */
599 s.main.c_cc[VEOF] = 04; /* insure that EOF is Control-D */
600 s.main.c_cc[VERASE] = CDISABLE; /* disable erase processing */
601 s.main.c_cc[VKILL] = CDISABLE; /* disable kill processing */
602
603 #ifdef HPUX
604 s.main.c_cflag = (s.main.c_cflag & ~CBAUD) | B9600; /* baud rate sanity */
605 #endif /* HPUX */
606
607 #ifdef AIX
608 /* AIX enhanced edit loses NULs, so disable it */
609 #ifndef IBMR2AIX
610 s.main.c_line = 0;
611 s.main.c_iflag &= ~ASCEDIT;
612 #endif
613 /* Also, PTY overloads NUL and BREAK.
614 don't ignore break, but don't signal either, so it looks like NUL. */
615 s.main.c_iflag &= ~IGNBRK;
616 s.main.c_iflag &= ~BRKINT;
617 /* QUIT and INTR work better as signals, so disable character forms */
618 s.main.c_cc[VINTR] = 0377;
619 #ifdef SIGNALS_VIA_CHARACTERS
620 /* the QUIT and INTR character are used in process_send_signal
621 so set them here to something useful. */
622 if (s.main.c_cc[VQUIT] == 0377)
623 s.main.c_cc[VQUIT] = '\\'&037; /* Control-\ */
624 if (s.main.c_cc[VINTR] == 0377)
625 s.main.c_cc[VINTR] = 'C'&037; /* Control-C */
626 #else /* no TIOCGPGRP or no TIOCGLTC or no TIOCGETC */
627 /* QUIT and INTR work better as signals, so disable character forms */
628 s.main.c_cc[VQUIT] = 0377;
629 s.main.c_cc[VINTR] = 0377;
630 s.main.c_lflag &= ~ISIG;
631 #endif /* no TIOCGPGRP or no TIOCGLTC or no TIOCGETC */
632 s.main.c_cc[VEOL] = 0377;
633 s.main.c_cflag = (s.main.c_cflag & ~CBAUD) | B9600; /* baud rate sanity */
634 #endif /* AIX */
635
636 #else /* not HAVE_TERMIO */
637
638 s.main.sg_flags &= ~(ECHO | CRMOD | ANYP | ALLDELAY | RAW | LCASE
639 | CBREAK | TANDEM);
640 s.main.sg_flags |= LPASS8;
641 s.main.sg_erase = 0377;
642 s.main.sg_kill = 0377;
643 s.lmode = LLITOUT | s.lmode; /* Don't strip 8th bit */
644
645 #endif /* not HAVE_TERMIO */
646
647 EMACS_SET_TTY (out, &s, 0);
648
649 #ifdef BSD4_1
650 if (interrupt_input)
651 reset_sigio ();
652 #endif /* BSD4_1 */
653 #ifdef RTU
654 {
655 int zero = 0;
656 ioctl (out, FIOASYNC, &zero);
657 }
658 #endif /* RTU */
659 #endif /* not DOS_NT */
660 }
661 #endif /* not VMS */
662
663 #endif /* subprocesses */
664 \f
665 /* Record a signal code and the handler for it. */
666 struct save_signal
667 {
668 int code;
669 SIGTYPE (*handler) P_ ((int));
670 };
671
672 static void save_signal_handlers P_ ((struct save_signal *));
673 static void restore_signal_handlers P_ ((struct save_signal *));
674
675 /* Suspend the Emacs process; give terminal to its superior. */
676
677 void
678 sys_suspend ()
679 {
680 #ifdef VMS
681 /* "Foster" parentage allows emacs to return to a subprocess that attached
682 to the current emacs as a cheaper than starting a whole new process. This
683 is set up by KEPTEDITOR.COM. */
684 unsigned long parent_id, foster_parent_id;
685 char *fpid_string;
686
687 fpid_string = getenv ("EMACS_PARENT_PID");
688 if (fpid_string != NULL)
689 {
690 sscanf (fpid_string, "%x", &foster_parent_id);
691 if (foster_parent_id != 0)
692 parent_id = foster_parent_id;
693 else
694 parent_id = getppid ();
695 }
696 else
697 parent_id = getppid ();
698
699 xfree (fpid_string); /* On VMS, this was malloc'd */
700
701 if (parent_id && parent_id != 0xffffffff)
702 {
703 SIGTYPE (*oldsig)() = (int) signal (SIGINT, SIG_IGN);
704 int status = LIB$ATTACH (&parent_id) & 1;
705 signal (SIGINT, oldsig);
706 return status;
707 }
708 else
709 {
710 struct {
711 int l;
712 char *a;
713 } d_prompt;
714 d_prompt.l = sizeof ("Emacs: "); /* Our special prompt */
715 d_prompt.a = "Emacs: "; /* Just a reminder */
716 LIB$SPAWN (0, 0, 0, 0, 0, 0, 0, 0, 0, 0, &d_prompt, 0);
717 return 1;
718 }
719 return -1;
720 #else
721 #if defined (SIGTSTP) && !defined (MSDOS)
722
723 {
724 int pgrp = EMACS_GETPGRP (0);
725 EMACS_KILLPG (pgrp, SIGTSTP);
726 }
727
728 #else /* No SIGTSTP */
729 #ifdef USG_JOBCTRL /* If you don't know what this is don't mess with it */
730 ptrace (0, 0, 0, 0); /* set for ptrace - caught by csh */
731 kill (getpid (), SIGQUIT);
732
733 #else /* No SIGTSTP or USG_JOBCTRL */
734
735 /* On a system where suspending is not implemented,
736 instead fork a subshell and let it talk directly to the terminal
737 while we wait. */
738 sys_subshell ();
739
740 #endif /* no USG_JOBCTRL */
741 #endif /* no SIGTSTP */
742 #endif /* not VMS */
743 }
744
745 /* Fork a subshell. */
746
747 void
748 sys_subshell ()
749 {
750 #ifdef macintosh
751 error ("Can't spawn subshell");
752 #else
753 #ifndef VMS
754 #ifdef DOS_NT /* Demacs 1.1.2 91/10/20 Manabu Higashida */
755 int st;
756 char oldwd[MAXPATHLEN+1]; /* Fixed length is safe on MSDOS. */
757 #endif
758 int pid;
759 struct save_signal saved_handlers[5];
760 Lisp_Object dir;
761 unsigned char *str = 0;
762 int len;
763
764 saved_handlers[0].code = SIGINT;
765 saved_handlers[1].code = SIGQUIT;
766 saved_handlers[2].code = SIGTERM;
767 #ifdef SIGIO
768 saved_handlers[3].code = SIGIO;
769 saved_handlers[4].code = 0;
770 #else
771 saved_handlers[3].code = 0;
772 #endif
773
774 /* Mentioning current_buffer->buffer would mean including buffer.h,
775 which somehow wedges the hp compiler. So instead... */
776
777 dir = intern ("default-directory");
778 if (NILP (Fboundp (dir)))
779 goto xyzzy;
780 dir = Fsymbol_value (dir);
781 if (!STRINGP (dir))
782 goto xyzzy;
783
784 dir = expand_and_dir_to_file (Funhandled_file_name_directory (dir), Qnil);
785 str = (unsigned char *) alloca (XSTRING (dir)->size + 2);
786 len = XSTRING (dir)->size;
787 bcopy (XSTRING (dir)->data, str, len);
788 if (str[len - 1] != '/') str[len++] = '/';
789 str[len] = 0;
790 xyzzy:
791
792 #ifdef DOS_NT
793 pid = 0;
794 #if __DJGPP__ > 1
795 save_signal_handlers (saved_handlers);
796 synch_process_alive = 1;
797 #endif /* __DJGPP__ > 1 */
798 #else
799 pid = vfork ();
800 if (pid == -1)
801 error ("Can't spawn subshell");
802 #endif
803
804 if (pid == 0)
805 {
806 char *sh = 0;
807
808 #ifdef DOS_NT /* MW, Aug 1993 */
809 getwd (oldwd);
810 if (sh == 0)
811 sh = (char *) egetenv ("SUSPEND"); /* KFS, 1994-12-14 */
812 #endif
813 if (sh == 0)
814 sh = (char *) egetenv ("SHELL");
815 if (sh == 0)
816 sh = "sh";
817
818 /* Use our buffer's default directory for the subshell. */
819 if (str)
820 chdir ((char *) str);
821
822 #ifdef subprocesses
823 close_process_descs (); /* Close Emacs's pipes/ptys */
824 #endif
825
826 #ifdef SET_EMACS_PRIORITY
827 {
828 extern int emacs_priority;
829
830 if (emacs_priority < 0)
831 nice (-emacs_priority);
832 }
833 #endif
834
835 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */
836 st = system (sh);
837 chdir (oldwd);
838 #if 0 /* This is also reported if last command executed in subshell failed, KFS */
839 if (st)
840 report_file_error ("Can't execute subshell", Fcons (build_string (sh), Qnil));
841 #endif
842 #else /* not MSDOS */
843 #ifdef WINDOWSNT
844 /* Waits for process completion */
845 pid = _spawnlp (_P_WAIT, sh, sh, NULL);
846 chdir (oldwd);
847 if (pid == -1)
848 write (1, "Can't execute subshell", 22);
849 #else /* not WINDOWSNT */
850 execlp (sh, sh, 0);
851 write (1, "Can't execute subshell", 22);
852 _exit (1);
853 #endif /* not WINDOWSNT */
854 #endif /* not MSDOS */
855 }
856
857 /* Do this now if we did not do it before. */
858 #if !defined (MSDOS) || __DJGPP__ == 1
859 save_signal_handlers (saved_handlers);
860 synch_process_alive = 1;
861 #endif
862
863 #ifndef DOS_NT
864 wait_for_termination (pid);
865 #endif
866 restore_signal_handlers (saved_handlers);
867 synch_process_alive = 0;
868 #endif /* !VMS */
869 #endif /* !macintosh */
870 }
871
872 static void
873 save_signal_handlers (saved_handlers)
874 struct save_signal *saved_handlers;
875 {
876 while (saved_handlers->code)
877 {
878 saved_handlers->handler
879 = (SIGTYPE (*) P_ ((int))) signal (saved_handlers->code, SIG_IGN);
880 saved_handlers++;
881 }
882 }
883
884 static void
885 restore_signal_handlers (saved_handlers)
886 struct save_signal *saved_handlers;
887 {
888 while (saved_handlers->code)
889 {
890 signal (saved_handlers->code, saved_handlers->handler);
891 saved_handlers++;
892 }
893 }
894 \f
895 #ifdef F_SETFL
896
897 int old_fcntl_flags;
898
899 void
900 init_sigio (fd)
901 int fd;
902 {
903 #ifdef FASYNC
904 old_fcntl_flags = fcntl (fd, F_GETFL, 0) & ~FASYNC;
905 fcntl (fd, F_SETFL, old_fcntl_flags | FASYNC);
906 #endif
907 interrupts_deferred = 0;
908 }
909
910 void
911 reset_sigio ()
912 {
913 unrequest_sigio ();
914 }
915
916 #ifdef FASYNC /* F_SETFL does not imply existence of FASYNC */
917
918 void
919 request_sigio ()
920 {
921 if (read_socket_hook)
922 return;
923
924 #ifdef SIGWINCH
925 sigunblock (sigmask (SIGWINCH));
926 #endif
927 fcntl (input_fd, F_SETFL, old_fcntl_flags | FASYNC);
928
929 interrupts_deferred = 0;
930 }
931
932 void
933 unrequest_sigio ()
934 {
935 if (read_socket_hook)
936 return;
937
938 #ifdef SIGWINCH
939 sigblock (sigmask (SIGWINCH));
940 #endif
941 fcntl (input_fd, F_SETFL, old_fcntl_flags);
942 interrupts_deferred = 1;
943 }
944
945 #else /* no FASYNC */
946 #ifdef STRIDE /* Stride doesn't have FASYNC - use FIOASYNC */
947
948 void
949 request_sigio ()
950 {
951 int on = 1;
952
953 if (read_socket_hook)
954 return;
955
956 ioctl (input_fd, FIOASYNC, &on);
957 interrupts_deferred = 0;
958 }
959
960 void
961 unrequest_sigio ()
962 {
963 int off = 0;
964
965 if (read_socket_hook)
966 return;
967
968 ioctl (input_fd, FIOASYNC, &off);
969 interrupts_deferred = 1;
970 }
971
972 #else /* not FASYNC, not STRIDE */
973
974 #ifdef _CX_UX
975
976 #include <termios.h>
977
978 void
979 request_sigio ()
980 {
981 int on = 1;
982 sigset_t st;
983
984 if (read_socket_hook)
985 return;
986
987 sigemptyset (&st);
988 sigaddset (&st, SIGIO);
989 ioctl (input_fd, FIOASYNC, &on);
990 interrupts_deferred = 0;
991 sigprocmask (SIG_UNBLOCK, &st, (sigset_t *)0);
992 }
993
994 void
995 unrequest_sigio ()
996 {
997 int off = 0;
998
999 if (read_socket_hook)
1000 return;
1001
1002 ioctl (input_fd, FIOASYNC, &off);
1003 interrupts_deferred = 1;
1004 }
1005
1006 #else /* ! _CX_UX */
1007
1008 void
1009 request_sigio ()
1010 {
1011 if (read_socket_hook)
1012 return;
1013
1014 croak ("request_sigio");
1015 }
1016
1017 void
1018 unrequest_sigio ()
1019 {
1020 if (read_socket_hook)
1021 return;
1022
1023 croak ("unrequest_sigio");
1024 }
1025
1026 #endif /* _CX_UX */
1027 #endif /* STRIDE */
1028 #endif /* FASYNC */
1029 #endif /* F_SETFL */
1030 \f
1031 /* Saving and restoring the process group of Emacs's terminal. */
1032
1033 #ifdef BSD_PGRPS
1034
1035 /* The process group of which Emacs was a member when it initially
1036 started.
1037
1038 If Emacs was in its own process group (i.e. inherited_pgroup ==
1039 getpid ()), then we know we're running under a shell with job
1040 control (Emacs would never be run as part of a pipeline).
1041 Everything is fine.
1042
1043 If Emacs was not in its own process group, then we know we're
1044 running under a shell (or a caller) that doesn't know how to
1045 separate itself from Emacs (like sh). Emacs must be in its own
1046 process group in order to receive SIGIO correctly. In this
1047 situation, we put ourselves in our own pgroup, forcibly set the
1048 tty's pgroup to our pgroup, and make sure to restore and reinstate
1049 the tty's pgroup just like any other terminal setting. If
1050 inherited_group was not the tty's pgroup, then we'll get a
1051 SIGTTmumble when we try to change the tty's pgroup, and a CONT if
1052 it goes foreground in the future, which is what should happen. */
1053 int inherited_pgroup;
1054
1055 /* Split off the foreground process group to Emacs alone.
1056 When we are in the foreground, but not started in our own process
1057 group, redirect the TTY to point to our own process group. We need
1058 to be in our own process group to receive SIGIO properly. */
1059 void
1060 narrow_foreground_group ()
1061 {
1062 int me = getpid ();
1063
1064 setpgrp (0, inherited_pgroup);
1065 if (inherited_pgroup != me)
1066 EMACS_SET_TTY_PGRP (input_fd, &me);
1067 setpgrp (0, me);
1068 }
1069
1070 /* Set the tty to our original foreground group. */
1071 void
1072 widen_foreground_group ()
1073 {
1074 if (inherited_pgroup != getpid ())
1075 EMACS_SET_TTY_PGRP (input_fd, &inherited_pgroup);
1076 setpgrp (0, inherited_pgroup);
1077 }
1078
1079 #endif /* BSD_PGRPS */
1080 \f
1081 /* Getting and setting emacs_tty structures. */
1082
1083 /* Set *TC to the parameters associated with the terminal FD.
1084 Return zero if all's well, or -1 if we ran into an error we
1085 couldn't deal with. */
1086 int
1087 emacs_get_tty (fd, settings)
1088 int fd;
1089 struct emacs_tty *settings;
1090 {
1091 /* Retrieve the primary parameters - baud rate, character size, etcetera. */
1092 #ifdef HAVE_TCATTR
1093 /* We have those nifty POSIX tcmumbleattr functions. */
1094 bzero (&settings->main, sizeof (settings->main));
1095 if (tcgetattr (fd, &settings->main) < 0)
1096 return -1;
1097
1098 #else
1099 #ifdef HAVE_TERMIO
1100 /* The SYSV-style interface? */
1101 if (ioctl (fd, TCGETA, &settings->main) < 0)
1102 return -1;
1103
1104 #else
1105 #ifdef VMS
1106 /* Vehemently Monstrous System? :-) */
1107 if (! (SYS$QIOW (0, fd, IO$_SENSEMODE, settings, 0, 0,
1108 &settings->main.class, 12, 0, 0, 0, 0)
1109 & 1))
1110 return -1;
1111
1112 #else
1113 #ifndef DOS_NT
1114 /* I give up - I hope you have the BSD ioctls. */
1115 if (ioctl (fd, TIOCGETP, &settings->main) < 0)
1116 return -1;
1117 #endif /* not DOS_NT */
1118 #endif
1119 #endif
1120 #endif
1121
1122 /* Suivant - Do we have to get struct ltchars data? */
1123 #ifdef HAVE_LTCHARS
1124 if (ioctl (fd, TIOCGLTC, &settings->ltchars) < 0)
1125 return -1;
1126 #endif
1127
1128 /* How about a struct tchars and a wordful of lmode bits? */
1129 #ifdef HAVE_TCHARS
1130 if (ioctl (fd, TIOCGETC, &settings->tchars) < 0
1131 || ioctl (fd, TIOCLGET, &settings->lmode) < 0)
1132 return -1;
1133 #endif
1134
1135 /* We have survived the tempest. */
1136 return 0;
1137 }
1138
1139
1140 /* Set the parameters of the tty on FD according to the contents of
1141 *SETTINGS. If FLUSHP is non-zero, we discard input.
1142 Return 0 if all went well, and -1 if anything failed. */
1143
1144 int
1145 emacs_set_tty (fd, settings, flushp)
1146 int fd;
1147 struct emacs_tty *settings;
1148 int flushp;
1149 {
1150 /* Set the primary parameters - baud rate, character size, etcetera. */
1151 #ifdef HAVE_TCATTR
1152 int i;
1153 /* We have those nifty POSIX tcmumbleattr functions.
1154 William J. Smith <wjs@wiis.wang.com> writes:
1155 "POSIX 1003.1 defines tcsetattr to return success if it was
1156 able to perform any of the requested actions, even if some
1157 of the requested actions could not be performed.
1158 We must read settings back to ensure tty setup properly.
1159 AIX requires this to keep tty from hanging occasionally." */
1160 /* This make sure that we don't loop indefinitely in here. */
1161 for (i = 0 ; i < 10 ; i++)
1162 if (tcsetattr (fd, flushp ? TCSAFLUSH : TCSADRAIN, &settings->main) < 0)
1163 {
1164 if (errno == EINTR)
1165 continue;
1166 else
1167 return -1;
1168 }
1169 else
1170 {
1171 struct termios new;
1172
1173 bzero (&new, sizeof (new));
1174 /* Get the current settings, and see if they're what we asked for. */
1175 tcgetattr (fd, &new);
1176 /* We cannot use memcmp on the whole structure here because under
1177 * aix386 the termios structure has some reserved field that may
1178 * not be filled in.
1179 */
1180 if ( new.c_iflag == settings->main.c_iflag
1181 && new.c_oflag == settings->main.c_oflag
1182 && new.c_cflag == settings->main.c_cflag
1183 && new.c_lflag == settings->main.c_lflag
1184 && memcmp (new.c_cc, settings->main.c_cc, NCCS) == 0)
1185 break;
1186 else
1187 continue;
1188 }
1189
1190 #else
1191 #ifdef HAVE_TERMIO
1192 /* The SYSV-style interface? */
1193 if (ioctl (fd, flushp ? TCSETAF : TCSETAW, &settings->main) < 0)
1194 return -1;
1195
1196 #else
1197 #ifdef VMS
1198 /* Vehemently Monstrous System? :-) */
1199 if (! (SYS$QIOW (0, fd, IO$_SETMODE, &input_iosb, 0, 0,
1200 &settings->main.class, 12, 0, 0, 0, 0)
1201 & 1))
1202 return -1;
1203
1204 #else
1205 #ifndef DOS_NT
1206 /* I give up - I hope you have the BSD ioctls. */
1207 if (ioctl (fd, (flushp) ? TIOCSETP : TIOCSETN, &settings->main) < 0)
1208 return -1;
1209 #endif /* not DOS_NT */
1210
1211 #endif
1212 #endif
1213 #endif
1214
1215 /* Suivant - Do we have to get struct ltchars data? */
1216 #ifdef HAVE_LTCHARS
1217 if (ioctl (fd, TIOCSLTC, &settings->ltchars) < 0)
1218 return -1;
1219 #endif
1220
1221 /* How about a struct tchars and a wordful of lmode bits? */
1222 #ifdef HAVE_TCHARS
1223 if (ioctl (fd, TIOCSETC, &settings->tchars) < 0
1224 || ioctl (fd, TIOCLSET, &settings->lmode) < 0)
1225 return -1;
1226 #endif
1227
1228 /* We have survived the tempest. */
1229 return 0;
1230 }
1231
1232 \f
1233 /* The initial tty mode bits */
1234 struct emacs_tty old_tty;
1235
1236 /* 1 if we have been through init_sys_modes. */
1237 int term_initted;
1238
1239 /* 1 if outer tty status has been recorded. */
1240 int old_tty_valid;
1241
1242 #ifdef BSD4_1
1243 /* BSD 4.1 needs to keep track of the lmode bits in order to start
1244 sigio. */
1245 int lmode;
1246 #endif
1247
1248 #ifndef F_SETOWN_BUG
1249 #ifdef F_SETOWN
1250 int old_fcntl_owner;
1251 #endif /* F_SETOWN */
1252 #endif /* F_SETOWN_BUG */
1253
1254 /* This may also be defined in stdio,
1255 but if so, this does no harm,
1256 and using the same name avoids wasting the other one's space. */
1257
1258 #ifdef nec_ews_svr4
1259 extern char *_sobuf ;
1260 #else
1261 #if defined (USG) || defined (DGUX)
1262 unsigned char _sobuf[BUFSIZ+8];
1263 #else
1264 char _sobuf[BUFSIZ];
1265 #endif
1266 #endif
1267
1268 #ifdef HAVE_LTCHARS
1269 static struct ltchars new_ltchars = {-1,-1,-1,-1,-1,-1};
1270 #endif
1271 #ifdef HAVE_TCHARS
1272 static struct tchars new_tchars = {-1,-1,-1,-1,-1,-1};
1273 #endif
1274
1275 void
1276 init_sys_modes ()
1277 {
1278 struct emacs_tty tty;
1279
1280 #ifdef macintosh
1281 Vwindow_system = intern ("mac");
1282 Vwindow_system_version = make_number (1);
1283
1284 /* cus-start.el complains if delete-exited-processes and x-bitmap-file-path not defined */
1285 #ifndef subprocesses
1286 DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes,
1287 "*Non-nil means delete processes immediately when they exit.\n\
1288 nil means don't delete them until `list-processes' is run.");
1289 delete_exited_processes = 0;
1290 #endif
1291
1292 #ifndef HAVE_X_WINDOWS
1293 DEFVAR_LISP ("x-bitmap-file-path", &Vx_bitmap_file_path,
1294 "List of directories to search for bitmap files for X.");
1295 Vx_bitmap_file_path = decode_env_path ((char *) 0, ".");
1296 #endif
1297
1298 #endif /* not macintosh */
1299
1300 #ifdef VMS
1301 #if 0
1302 static int oob_chars[2] = {0, 1 << 7}; /* catch C-g's */
1303 extern int (*interrupt_signal) ();
1304 #endif
1305 #endif
1306
1307 Vtty_erase_char = Qnil;
1308
1309 if (noninteractive)
1310 return;
1311
1312 #ifdef VMS
1313 if (!input_ef)
1314 input_ef = get_kbd_event_flag ();
1315 /* LIB$GET_EF (&input_ef); */
1316 SYS$CLREF (input_ef);
1317 waiting_for_ast = 0;
1318 if (!timer_ef)
1319 timer_ef = get_timer_event_flag ();
1320 /* LIB$GET_EF (&timer_ef); */
1321 SYS$CLREF (timer_ef);
1322 #if 0
1323 if (!process_ef)
1324 {
1325 LIB$GET_EF (&process_ef);
1326 SYS$CLREF (process_ef);
1327 }
1328 if (input_ef / 32 != process_ef / 32)
1329 croak ("Input and process event flags in different clusters.");
1330 #endif
1331 if (input_ef / 32 != timer_ef / 32)
1332 croak ("Input and timer event flags in different clusters.");
1333 #if 0
1334 input_eflist = ((unsigned) 1 << (input_ef % 32)) |
1335 ((unsigned) 1 << (process_ef % 32));
1336 #endif
1337 timer_eflist = ((unsigned) 1 << (input_ef % 32)) |
1338 ((unsigned) 1 << (timer_ef % 32));
1339 #ifndef VMS4_4
1340 sys_access_reinit ();
1341 #endif
1342 #endif /* not VMS */
1343
1344 #ifdef BSD_PGRPS
1345 if (! read_socket_hook && EQ (Vwindow_system, Qnil))
1346 narrow_foreground_group ();
1347 #endif
1348
1349 #ifdef HAVE_WINDOW_SYSTEM
1350 /* Emacs' window system on MSDOG uses the `internal terminal' and therefore
1351 needs the initialization code below. */
1352 if (!read_socket_hook && EQ (Vwindow_system, Qnil))
1353 #endif
1354 {
1355 EMACS_GET_TTY (input_fd, &old_tty);
1356
1357 old_tty_valid = 1;
1358
1359 tty = old_tty;
1360
1361 #if defined (HAVE_TERMIO) || defined (HAVE_TERMIOS)
1362 XSETINT (Vtty_erase_char, old_tty.main.c_cc[VERASE]);
1363
1364 #ifdef DGUX
1365 /* This allows meta to be sent on 8th bit. */
1366 tty.main.c_iflag &= ~INPCK; /* don't check input for parity */
1367 #endif
1368 tty.main.c_iflag |= (IGNBRK); /* Ignore break condition */
1369 tty.main.c_iflag &= ~ICRNL; /* Disable map of CR to NL on input */
1370 #ifdef INLCR /* I'm just being cautious,
1371 since I can't check how widespread INLCR is--rms. */
1372 tty.main.c_iflag &= ~INLCR; /* Disable map of NL to CR on input */
1373 #endif
1374 #ifdef ISTRIP
1375 tty.main.c_iflag &= ~ISTRIP; /* don't strip 8th bit on input */
1376 #endif
1377 tty.main.c_lflag &= ~ECHO; /* Disable echo */
1378 tty.main.c_lflag &= ~ICANON; /* Disable erase/kill processing */
1379 #ifdef IEXTEN
1380 tty.main.c_lflag &= ~IEXTEN; /* Disable other editing characters. */
1381 #endif
1382 tty.main.c_lflag |= ISIG; /* Enable signals */
1383 if (flow_control)
1384 {
1385 tty.main.c_iflag |= IXON; /* Enable start/stop output control */
1386 #ifdef IXANY
1387 tty.main.c_iflag &= ~IXANY;
1388 #endif /* IXANY */
1389 }
1390 else
1391 tty.main.c_iflag &= ~IXON; /* Disable start/stop output control */
1392 tty.main.c_oflag &= ~ONLCR; /* Disable map of NL to CR-NL
1393 on output */
1394 tty.main.c_oflag &= ~TAB3; /* Disable tab expansion */
1395 #ifdef CS8
1396 if (meta_key)
1397 {
1398 tty.main.c_cflag |= CS8; /* allow 8th bit on input */
1399 tty.main.c_cflag &= ~PARENB;/* Don't check parity */
1400 }
1401 #endif
1402 tty.main.c_cc[VINTR] = quit_char; /* C-g (usually) gives SIGINT */
1403 /* Set up C-g for both SIGQUIT and SIGINT.
1404 We don't know which we will get, but we handle both alike
1405 so which one it really gives us does not matter. */
1406 tty.main.c_cc[VQUIT] = quit_char;
1407 tty.main.c_cc[VMIN] = 1; /* Input should wait for at least 1 char */
1408 tty.main.c_cc[VTIME] = 0; /* no matter how long that takes. */
1409 #ifdef VSWTCH
1410 tty.main.c_cc[VSWTCH] = CDISABLE; /* Turn off shell layering use
1411 of C-z */
1412 #endif /* VSWTCH */
1413
1414 #if defined (mips) || defined (HAVE_TCATTR)
1415 #ifdef VSUSP
1416 tty.main.c_cc[VSUSP] = CDISABLE; /* Turn off mips handling of C-z. */
1417 #endif /* VSUSP */
1418 #ifdef V_DSUSP
1419 tty.main.c_cc[V_DSUSP] = CDISABLE; /* Turn off mips handling of C-y. */
1420 #endif /* V_DSUSP */
1421 #ifdef VDSUSP /* Some systems have VDSUSP, some have V_DSUSP. */
1422 tty.main.c_cc[VDSUSP] = CDISABLE;
1423 #endif /* VDSUSP */
1424 #ifdef VLNEXT
1425 tty.main.c_cc[VLNEXT] = CDISABLE;
1426 #endif /* VLNEXT */
1427 #ifdef VREPRINT
1428 tty.main.c_cc[VREPRINT] = CDISABLE;
1429 #endif /* VREPRINT */
1430 #ifdef VWERASE
1431 tty.main.c_cc[VWERASE] = CDISABLE;
1432 #endif /* VWERASE */
1433 #ifdef VDISCARD
1434 tty.main.c_cc[VDISCARD] = CDISABLE;
1435 #endif /* VDISCARD */
1436
1437 if (flow_control)
1438 {
1439 #ifdef VSTART
1440 tty.main.c_cc[VSTART] = '\021';
1441 #endif /* VSTART */
1442 #ifdef VSTOP
1443 tty.main.c_cc[VSTOP] = '\023';
1444 #endif /* VSTOP */
1445 }
1446 else
1447 {
1448 #ifdef VSTART
1449 tty.main.c_cc[VSTART] = CDISABLE;
1450 #endif /* VSTART */
1451 #ifdef VSTOP
1452 tty.main.c_cc[VSTOP] = CDISABLE;
1453 #endif /* VSTOP */
1454 }
1455 #endif /* mips or HAVE_TCATTR */
1456
1457 #ifdef SET_LINE_DISCIPLINE
1458 /* Need to explicitly request TERMIODISC line discipline or
1459 Ultrix's termios does not work correctly. */
1460 tty.main.c_line = SET_LINE_DISCIPLINE;
1461 #endif
1462 #ifdef AIX
1463 #ifndef IBMR2AIX
1464 /* AIX enhanced edit loses NULs, so disable it. */
1465 tty.main.c_line = 0;
1466 tty.main.c_iflag &= ~ASCEDIT;
1467 #else
1468 tty.main.c_cc[VSTRT] = 255;
1469 tty.main.c_cc[VSTOP] = 255;
1470 tty.main.c_cc[VSUSP] = 255;
1471 tty.main.c_cc[VDSUSP] = 255;
1472 #endif /* IBMR2AIX */
1473 if (flow_control)
1474 {
1475 #ifdef VSTART
1476 tty.main.c_cc[VSTART] = '\021';
1477 #endif /* VSTART */
1478 #ifdef VSTOP
1479 tty.main.c_cc[VSTOP] = '\023';
1480 #endif /* VSTOP */
1481 }
1482 /* Also, PTY overloads NUL and BREAK.
1483 don't ignore break, but don't signal either, so it looks like NUL.
1484 This really serves a purpose only if running in an XTERM window
1485 or via TELNET or the like, but does no harm elsewhere. */
1486 tty.main.c_iflag &= ~IGNBRK;
1487 tty.main.c_iflag &= ~BRKINT;
1488 #endif
1489 #else /* if not HAVE_TERMIO */
1490 #ifdef VMS
1491 tty.main.tt_char |= TT$M_NOECHO;
1492 if (meta_key)
1493 tty.main.tt_char |= TT$M_EIGHTBIT;
1494 if (flow_control)
1495 tty.main.tt_char |= TT$M_TTSYNC;
1496 else
1497 tty.main.tt_char &= ~TT$M_TTSYNC;
1498 tty.main.tt2_char |= TT2$M_PASTHRU | TT2$M_XON;
1499 #else /* not VMS (BSD, that is) */
1500 #ifndef DOS_NT
1501 XSETINT (Vtty_erase_char, tty.main.sg_erase);
1502 tty.main.sg_flags &= ~(ECHO | CRMOD | XTABS);
1503 if (meta_key)
1504 tty.main.sg_flags |= ANYP;
1505 tty.main.sg_flags |= interrupt_input ? RAW : CBREAK;
1506 #endif /* not DOS_NT */
1507 #endif /* not VMS (BSD, that is) */
1508 #endif /* not HAVE_TERMIO */
1509
1510 /* If going to use CBREAK mode, we must request C-g to interrupt
1511 and turn off start and stop chars, etc. If not going to use
1512 CBREAK mode, do this anyway so as to turn off local flow
1513 control for user coming over network on 4.2; in this case,
1514 only t_stopc and t_startc really matter. */
1515 #ifndef HAVE_TERMIO
1516 #ifdef HAVE_TCHARS
1517 /* Note: if not using CBREAK mode, it makes no difference how we
1518 set this */
1519 tty.tchars = new_tchars;
1520 tty.tchars.t_intrc = quit_char;
1521 if (flow_control)
1522 {
1523 tty.tchars.t_startc = '\021';
1524 tty.tchars.t_stopc = '\023';
1525 }
1526
1527 tty.lmode = LDECCTQ | LLITOUT | LPASS8 | LNOFLSH | old_tty.lmode;
1528 #ifdef ultrix
1529 /* Under Ultrix 4.2a, leaving this out doesn't seem to hurt
1530 anything, and leaving it in breaks the meta key. Go figure. */
1531 tty.lmode &= ~LLITOUT;
1532 #endif
1533
1534 #ifdef BSD4_1
1535 lmode = tty.lmode;
1536 #endif
1537
1538 #endif /* HAVE_TCHARS */
1539 #endif /* not HAVE_TERMIO */
1540
1541 #ifdef HAVE_LTCHARS
1542 tty.ltchars = new_ltchars;
1543 #endif /* HAVE_LTCHARS */
1544 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida, MW Aug 1993 */
1545 if (!term_initted)
1546 internal_terminal_init ();
1547 dos_ttraw ();
1548 #endif
1549
1550 EMACS_SET_TTY (input_fd, &tty, 0);
1551
1552 /* This code added to insure that, if flow-control is not to be used,
1553 we have an unlocked terminal at the start. */
1554
1555 #ifdef TCXONC
1556 if (!flow_control) ioctl (input_fd, TCXONC, 1);
1557 #endif
1558 #ifndef APOLLO
1559 #ifdef TIOCSTART
1560 if (!flow_control) ioctl (input_fd, TIOCSTART, 0);
1561 #endif
1562 #endif
1563
1564 #if defined (HAVE_TERMIOS) || defined (HPUX9)
1565 #ifdef TCOON
1566 if (!flow_control) tcflow (input_fd, TCOON);
1567 #endif
1568 #endif
1569
1570 #ifdef AIXHFT
1571 hft_init ();
1572 #ifdef IBMR2AIX
1573 {
1574 /* IBM's HFT device usually thinks a ^J should be LF/CR. We need it
1575 to be only LF. This is the way that is done. */
1576 struct termio tty;
1577
1578 if (ioctl (1, HFTGETID, &tty) != -1)
1579 write (1, "\033[20l", 5);
1580 }
1581 #endif
1582 #endif /* AIXHFT */
1583
1584 #ifdef VMS
1585 /* Appears to do nothing when in PASTHRU mode.
1586 SYS$QIOW (0, input_fd, IO$_SETMODE|IO$M_OUTBAND, 0, 0, 0,
1587 interrupt_signal, oob_chars, 0, 0, 0, 0);
1588 */
1589 queue_kbd_input (0);
1590 #endif /* VMS */
1591 }
1592
1593 #ifdef F_SETFL
1594 #ifndef F_SETOWN_BUG
1595 #ifdef F_GETOWN /* F_SETFL does not imply existence of F_GETOWN */
1596 if (interrupt_input
1597 && ! read_socket_hook && EQ (Vwindow_system, Qnil))
1598 {
1599 old_fcntl_owner = fcntl (input_fd, F_GETOWN, 0);
1600 fcntl (input_fd, F_SETOWN, getpid ());
1601 init_sigio (input_fd);
1602 }
1603 #endif /* F_GETOWN */
1604 #endif /* F_SETOWN_BUG */
1605 #endif /* F_SETFL */
1606
1607 #ifdef BSD4_1
1608 if (interrupt_input)
1609 init_sigio (input_fd);
1610 #endif
1611
1612 #ifdef VMS /* VMS sometimes has this symbol but lacks setvbuf. */
1613 #undef _IOFBF
1614 #endif
1615 #ifdef _IOFBF
1616 /* This symbol is defined on recent USG systems.
1617 Someone says without this call USG won't really buffer the file
1618 even with a call to setbuf. */
1619 setvbuf (stdout, (char *) _sobuf, _IOFBF, sizeof _sobuf);
1620 #else
1621 setbuf (stdout, (char *) _sobuf);
1622 #endif
1623 #ifdef HAVE_WINDOW_SYSTEM
1624 /* Emacs' window system on MSDOG uses the `internal terminal' and therefore
1625 needs the initialization code below. */
1626 if (EQ (Vwindow_system, Qnil)
1627 #ifndef WINDOWSNT
1628 /* When running in tty mode on NT/Win95, we have a read_socket
1629 hook, but still need the rest of the initialization code below. */
1630 && (! read_socket_hook)
1631 #endif
1632 )
1633 #endif
1634 set_terminal_modes ();
1635
1636 if (!term_initted
1637 && FRAMEP (Vterminal_frame)
1638 && FRAME_TERMCAP_P (XFRAME (Vterminal_frame)))
1639 init_frame_faces (XFRAME (Vterminal_frame));
1640
1641 if (term_initted && no_redraw_on_reenter)
1642 {
1643 if (display_completed)
1644 direct_output_forward_char (0);
1645 }
1646 else
1647 {
1648 frame_garbaged = 1;
1649 if (FRAMEP (Vterminal_frame))
1650 FRAME_GARBAGED_P (XFRAME (Vterminal_frame)) = 1;
1651 }
1652
1653 term_initted = 1;
1654 }
1655
1656 /* Return nonzero if safe to use tabs in output.
1657 At the time this is called, init_sys_modes has not been done yet. */
1658
1659 int
1660 tabs_safe_p ()
1661 {
1662 struct emacs_tty tty;
1663
1664 EMACS_GET_TTY (input_fd, &tty);
1665 return EMACS_TTY_TABS_OK (&tty);
1666 }
1667 \f
1668 /* Get terminal size from system.
1669 Store number of lines into *HEIGHTP and width into *WIDTHP.
1670 We store 0 if there's no valid information. */
1671
1672 void
1673 get_frame_size (widthp, heightp)
1674 int *widthp, *heightp;
1675 {
1676
1677 #ifdef TIOCGWINSZ
1678
1679 /* BSD-style. */
1680 struct winsize size;
1681
1682 if (ioctl (input_fd, TIOCGWINSZ, &size) == -1)
1683 *widthp = *heightp = 0;
1684 else
1685 {
1686 *widthp = size.ws_col;
1687 *heightp = size.ws_row;
1688 }
1689
1690 #else
1691 #ifdef TIOCGSIZE
1692
1693 /* SunOS - style. */
1694 struct ttysize size;
1695
1696 if (ioctl (input_fd, TIOCGSIZE, &size) == -1)
1697 *widthp = *heightp = 0;
1698 else
1699 {
1700 *widthp = size.ts_cols;
1701 *heightp = size.ts_lines;
1702 }
1703
1704 #else
1705 #ifdef VMS
1706
1707 struct sensemode tty;
1708
1709 SYS$QIOW (0, input_fd, IO$_SENSEMODE, &tty, 0, 0,
1710 &tty.class, 12, 0, 0, 0, 0);
1711 *widthp = tty.scr_wid;
1712 *heightp = tty.scr_len;
1713
1714 #else
1715 #ifdef MSDOS
1716 *widthp = ScreenCols ();
1717 *heightp = ScreenRows ();
1718 #else /* system doesn't know size */
1719 *widthp = 0;
1720 *heightp = 0;
1721 #endif
1722
1723 #endif /* not VMS */
1724 #endif /* not SunOS-style */
1725 #endif /* not BSD-style */
1726 }
1727
1728 /* Set the logical window size associated with descriptor FD
1729 to HEIGHT and WIDTH. This is used mainly with ptys. */
1730
1731 int
1732 set_window_size (fd, height, width)
1733 int fd, height, width;
1734 {
1735 #ifdef TIOCSWINSZ
1736
1737 /* BSD-style. */
1738 struct winsize size;
1739 size.ws_row = height;
1740 size.ws_col = width;
1741
1742 if (ioctl (fd, TIOCSWINSZ, &size) == -1)
1743 return 0; /* error */
1744 else
1745 return 1;
1746
1747 #else
1748 #ifdef TIOCSSIZE
1749
1750 /* SunOS - style. */
1751 struct ttysize size;
1752 size.ts_lines = height;
1753 size.ts_cols = width;
1754
1755 if (ioctl (fd, TIOCGSIZE, &size) == -1)
1756 return 0;
1757 else
1758 return 1;
1759 #else
1760 return -1;
1761 #endif /* not SunOS-style */
1762 #endif /* not BSD-style */
1763 }
1764
1765 \f
1766 /* Prepare the terminal for exiting Emacs; move the cursor to the
1767 bottom of the frame, turn off interrupt-driven I/O, etc. */
1768 void
1769 reset_sys_modes ()
1770 {
1771 struct frame *sf;
1772
1773 if (noninteractive)
1774 {
1775 fflush (stdout);
1776 return;
1777 }
1778 if (!term_initted)
1779 return;
1780 #ifdef HAVE_WINDOW_SYSTEM
1781 /* Emacs' window system on MSDOG uses the `internal terminal' and therefore
1782 needs the clean-up code below. */
1783 if (!EQ (Vwindow_system, Qnil)
1784 #ifndef WINDOWSNT
1785 /* When running in tty mode on NT/Win95, we have a read_socket
1786 hook, but still need the rest of the clean-up code below. */
1787 || read_socket_hook
1788 #endif
1789 )
1790 return;
1791 #endif
1792 sf = SELECTED_FRAME ();
1793 cursor_to (FRAME_HEIGHT (sf) - 1, 0);
1794 clear_end_of_line (FRAME_WIDTH (sf));
1795 /* clear_end_of_line may move the cursor */
1796 cursor_to (FRAME_HEIGHT (sf) - 1, 0);
1797 #if defined (IBMR2AIX) && defined (AIXHFT)
1798 {
1799 /* HFT devices normally use ^J as a LF/CR. We forced it to
1800 do the LF only. Now, we need to reset it. */
1801 struct termio tty;
1802
1803 if (ioctl (1, HFTGETID, &tty) != -1)
1804 write (1, "\033[20h", 5);
1805 }
1806 #endif
1807
1808 reset_terminal_modes ();
1809 fflush (stdout);
1810 #ifdef BSD_SYSTEM
1811 #ifndef BSD4_1
1812 /* Avoid possible loss of output when changing terminal modes. */
1813 fsync (fileno (stdout));
1814 #endif
1815 #endif
1816
1817 #ifdef F_SETFL
1818 #ifndef F_SETOWN_BUG
1819 #ifdef F_SETOWN /* F_SETFL does not imply existence of F_SETOWN */
1820 if (interrupt_input)
1821 {
1822 reset_sigio ();
1823 fcntl (input_fd, F_SETOWN, old_fcntl_owner);
1824 }
1825 #endif /* F_SETOWN */
1826 #endif /* F_SETOWN_BUG */
1827 #ifdef O_NDELAY
1828 fcntl (input_fd, F_SETFL, fcntl (input_fd, F_GETFL, 0) & ~O_NDELAY);
1829 #endif
1830 #endif /* F_SETFL */
1831 #ifdef BSD4_1
1832 if (interrupt_input)
1833 reset_sigio ();
1834 #endif /* BSD4_1 */
1835
1836 if (old_tty_valid)
1837 while (EMACS_SET_TTY (input_fd, &old_tty, 0) < 0 && errno == EINTR)
1838 ;
1839
1840 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */
1841 dos_ttcooked ();
1842 #endif
1843
1844 #ifdef SET_LINE_DISCIPLINE
1845 /* Ultrix's termios *ignores* any line discipline except TERMIODISC.
1846 A different old line discipline is therefore not restored, yet.
1847 Restore the old line discipline by hand. */
1848 ioctl (0, TIOCSETD, &old_tty.main.c_line);
1849 #endif
1850
1851 #ifdef AIXHFT
1852 hft_reset ();
1853 #endif
1854
1855 #ifdef BSD_PGRPS
1856 widen_foreground_group ();
1857 #endif
1858 }
1859 \f
1860 #ifdef HAVE_PTYS
1861
1862 /* Set up the proper status flags for use of a pty. */
1863
1864 void
1865 setup_pty (fd)
1866 int fd;
1867 {
1868 /* I'm told that TOICREMOTE does not mean control chars
1869 "can't be sent" but rather that they don't have
1870 input-editing or signaling effects.
1871 That should be good, because we have other ways
1872 to do those things in Emacs.
1873 However, telnet mode seems not to work on 4.2.
1874 So TIOCREMOTE is turned off now. */
1875
1876 /* Under hp-ux, if TIOCREMOTE is turned on, some calls
1877 will hang. In particular, the "timeout" feature (which
1878 causes a read to return if there is no data available)
1879 does this. Also it is known that telnet mode will hang
1880 in such a way that Emacs must be stopped (perhaps this
1881 is the same problem).
1882
1883 If TIOCREMOTE is turned off, then there is a bug in
1884 hp-ux which sometimes loses data. Apparently the
1885 code which blocks the master process when the internal
1886 buffer fills up does not work. Other than this,
1887 though, everything else seems to work fine.
1888
1889 Since the latter lossage is more benign, we may as well
1890 lose that way. -- cph */
1891 #ifdef FIONBIO
1892 #if defined(SYSV_PTYS) || defined(UNIX98_PTYS)
1893 {
1894 int on = 1;
1895 ioctl (fd, FIONBIO, &on);
1896 }
1897 #endif
1898 #endif
1899 #ifdef IBMRTAIX
1900 /* On AIX, the parent gets SIGHUP when a pty attached child dies. So, we */
1901 /* ignore SIGHUP once we've started a child on a pty. Note that this may */
1902 /* cause EMACS not to die when it should, i.e., when its own controlling */
1903 /* tty goes away. I've complained to the AIX developers, and they may */
1904 /* change this behavior, but I'm not going to hold my breath. */
1905 signal (SIGHUP, SIG_IGN);
1906 #endif
1907 }
1908 #endif /* HAVE_PTYS */
1909 \f
1910 #ifdef VMS
1911
1912 /* Assigning an input channel is done at the start of Emacs execution.
1913 This is called each time Emacs is resumed, also, but does nothing
1914 because input_chain is no longer zero. */
1915
1916 void
1917 init_vms_input ()
1918 {
1919 int status;
1920
1921 if (input_fd == 0)
1922 {
1923 status = SYS$ASSIGN (&input_dsc, &input_fd, 0, 0);
1924 if (! (status & 1))
1925 LIB$STOP (status);
1926 }
1927 }
1928
1929 /* Deassigning the input channel is done before exiting. */
1930
1931 void
1932 stop_vms_input ()
1933 {
1934 return SYS$DASSGN (input_fd);
1935 }
1936
1937 short input_buffer;
1938
1939 /* Request reading one character into the keyboard buffer.
1940 This is done as soon as the buffer becomes empty. */
1941
1942 void
1943 queue_kbd_input ()
1944 {
1945 int status;
1946 extern kbd_input_ast ();
1947
1948 waiting_for_ast = 0;
1949 stop_input = 0;
1950 status = SYS$QIO (0, input_fd, IO$_READVBLK,
1951 &input_iosb, kbd_input_ast, 1,
1952 &input_buffer, 1, 0, terminator_mask, 0, 0);
1953 }
1954
1955 int input_count;
1956
1957 /* Ast routine that is called when keyboard input comes in
1958 in accord with the SYS$QIO above. */
1959
1960 void
1961 kbd_input_ast ()
1962 {
1963 register int c = -1;
1964 int old_errno = errno;
1965 extern EMACS_TIME *input_available_clear_time;
1966
1967 if (waiting_for_ast)
1968 SYS$SETEF (input_ef);
1969 waiting_for_ast = 0;
1970 input_count++;
1971 #ifdef ASTDEBUG
1972 if (input_count == 25)
1973 exit (1);
1974 printf ("Ast # %d,", input_count);
1975 printf (" iosb = %x, %x, %x, %x",
1976 input_iosb.offset, input_iosb.status, input_iosb.termlen,
1977 input_iosb.term);
1978 #endif
1979 if (input_iosb.offset)
1980 {
1981 c = input_buffer;
1982 #ifdef ASTDEBUG
1983 printf (", char = 0%o", c);
1984 #endif
1985 }
1986 #ifdef ASTDEBUG
1987 printf ("\n");
1988 fflush (stdout);
1989 sleep (1);
1990 #endif
1991 if (! stop_input)
1992 queue_kbd_input ();
1993 if (c >= 0)
1994 {
1995 struct input_event e;
1996 e.kind = ascii_keystroke;
1997 XSETINT (e.code, c);
1998 e.frame_or_window = selected_frame;
1999 kbd_buffer_store_event (&e);
2000 }
2001 if (input_available_clear_time)
2002 EMACS_SET_SECS_USECS (*input_available_clear_time, 0, 0);
2003 errno = old_errno;
2004 }
2005
2006 /* Wait until there is something in kbd_buffer. */
2007
2008 void
2009 wait_for_kbd_input ()
2010 {
2011 extern int have_process_input, process_exited;
2012
2013 /* If already something, avoid doing system calls. */
2014 if (detect_input_pending ())
2015 {
2016 return;
2017 }
2018 /* Clear a flag, and tell ast routine above to set it. */
2019 SYS$CLREF (input_ef);
2020 waiting_for_ast = 1;
2021 /* Check for timing error: ast happened while we were doing that. */
2022 if (!detect_input_pending ())
2023 {
2024 /* No timing error: wait for flag to be set. */
2025 set_waiting_for_input (0);
2026 SYS$WFLOR (input_ef, input_eflist);
2027 clear_waiting_for_input (0);
2028 if (!detect_input_pending ())
2029 /* Check for subprocess input availability */
2030 {
2031 int dsp = have_process_input || process_exited;
2032
2033 SYS$CLREF (process_ef);
2034 if (have_process_input)
2035 process_command_input ();
2036 if (process_exited)
2037 process_exit ();
2038 if (dsp)
2039 {
2040 update_mode_lines++;
2041 prepare_menu_bars ();
2042 redisplay_preserve_echo_area ();
2043 }
2044 }
2045 }
2046 waiting_for_ast = 0;
2047 }
2048
2049 /* Get rid of any pending QIO, when we are about to suspend
2050 or when we want to throw away pending input.
2051 We wait for a positive sign that the AST routine has run
2052 and therefore there is no I/O request queued when we return.
2053 SYS$SETAST is used to avoid a timing error. */
2054
2055 void
2056 end_kbd_input ()
2057 {
2058 #ifdef ASTDEBUG
2059 printf ("At end_kbd_input.\n");
2060 fflush (stdout);
2061 sleep (1);
2062 #endif
2063 if (LIB$AST_IN_PROG ()) /* Don't wait if suspending from kbd_buffer_store_event! */
2064 {
2065 SYS$CANCEL (input_fd);
2066 return;
2067 }
2068
2069 SYS$SETAST (0);
2070 /* Clear a flag, and tell ast routine above to set it. */
2071 SYS$CLREF (input_ef);
2072 waiting_for_ast = 1;
2073 stop_input = 1;
2074 SYS$CANCEL (input_fd);
2075 SYS$SETAST (1);
2076 SYS$WAITFR (input_ef);
2077 waiting_for_ast = 0;
2078 }
2079
2080 /* Wait for either input available or time interval expiry. */
2081
2082 void
2083 input_wait_timeout (timeval)
2084 int timeval; /* Time to wait, in seconds */
2085 {
2086 int time [2];
2087 static int zero = 0;
2088 static int large = -10000000;
2089
2090 LIB$EMUL (&timeval, &large, &zero, time); /* Convert to VMS format */
2091
2092 /* If already something, avoid doing system calls. */
2093 if (detect_input_pending ())
2094 {
2095 return;
2096 }
2097 /* Clear a flag, and tell ast routine above to set it. */
2098 SYS$CLREF (input_ef);
2099 waiting_for_ast = 1;
2100 /* Check for timing error: ast happened while we were doing that. */
2101 if (!detect_input_pending ())
2102 {
2103 /* No timing error: wait for flag to be set. */
2104 SYS$CANTIM (1, 0);
2105 if (SYS$SETIMR (timer_ef, time, 0, 1) & 1) /* Set timer */
2106 SYS$WFLOR (timer_ef, timer_eflist); /* Wait for timer expiry or input */
2107 }
2108 waiting_for_ast = 0;
2109 }
2110
2111 /* The standard `sleep' routine works some other way
2112 and it stops working if you have ever quit out of it.
2113 This one continues to work. */
2114
2115 sys_sleep (timeval)
2116 int timeval;
2117 {
2118 int time [2];
2119 static int zero = 0;
2120 static int large = -10000000;
2121
2122 LIB$EMUL (&timeval, &large, &zero, time); /* Convert to VMS format */
2123
2124 SYS$CANTIM (1, 0);
2125 if (SYS$SETIMR (timer_ef, time, 0, 1) & 1) /* Set timer */
2126 SYS$WAITFR (timer_ef); /* Wait for timer expiry only */
2127 }
2128
2129 void
2130 init_sigio (fd)
2131 int fd;
2132 {
2133 request_sigio ();
2134 }
2135
2136 reset_sigio ()
2137 {
2138 unrequest_sigio ();
2139 }
2140
2141 void
2142 request_sigio ()
2143 {
2144 croak ("request sigio");
2145 }
2146
2147 void
2148 unrequest_sigio ()
2149 {
2150 croak ("unrequest sigio");
2151 }
2152
2153 #endif /* VMS */
2154 \f
2155 /* Note that VMS compiler won't accept defined (CANNOT_DUMP). */
2156 #ifndef CANNOT_DUMP
2157 #define NEED_STARTS
2158 #endif
2159
2160 #ifndef SYSTEM_MALLOC
2161 #ifndef NEED_STARTS
2162 #define NEED_STARTS
2163 #endif
2164 #endif
2165
2166 #ifdef NEED_STARTS
2167 /* Some systems that cannot dump also cannot implement these. */
2168
2169 /*
2170 * Return the address of the start of the text segment prior to
2171 * doing an unexec. After unexec the return value is undefined.
2172 * See crt0.c for further explanation and _start.
2173 *
2174 */
2175
2176 #if !(defined (__NetBSD__) && defined (__ELF__))
2177 #ifndef HAVE_TEXT_START
2178 char *
2179 start_of_text ()
2180 {
2181 #ifdef TEXT_START
2182 return ((char *) TEXT_START);
2183 #else
2184 #ifdef GOULD
2185 extern csrt ();
2186 return ((char *) csrt);
2187 #else /* not GOULD */
2188 extern int _start ();
2189 return ((char *) _start);
2190 #endif /* GOULD */
2191 #endif /* TEXT_START */
2192 }
2193 #endif /* not HAVE_TEXT_START */
2194 #endif
2195
2196 /*
2197 * Return the address of the start of the data segment prior to
2198 * doing an unexec. After unexec the return value is undefined.
2199 * See crt0.c for further information and definition of data_start.
2200 *
2201 * Apparently, on BSD systems this is etext at startup. On
2202 * USG systems (swapping) this is highly mmu dependent and
2203 * is also dependent on whether or not the program is running
2204 * with shared text. Generally there is a (possibly large)
2205 * gap between end of text and start of data with shared text.
2206 *
2207 * On Uniplus+ systems with shared text, data starts at a
2208 * fixed address. Each port (from a given oem) is generally
2209 * different, and the specific value of the start of data can
2210 * be obtained via the UniPlus+ specific "uvar" system call,
2211 * however the method outlined in crt0.c seems to be more portable.
2212 *
2213 * Probably what will have to happen when a USG unexec is available,
2214 * at least on UniPlus, is temacs will have to be made unshared so
2215 * that text and data are contiguous. Then once loadup is complete,
2216 * unexec will produce a shared executable where the data can be
2217 * at the normal shared text boundary and the startofdata variable
2218 * will be patched by unexec to the correct value.
2219 *
2220 */
2221
2222 char *
2223 start_of_data ()
2224 {
2225 #ifdef DATA_START
2226 return ((char *) DATA_START);
2227 #else
2228 #ifdef ORDINARY_LINK
2229 /*
2230 * This is a hack. Since we're not linking crt0.c or pre_crt0.c,
2231 * data_start isn't defined. We take the address of environ, which
2232 * is known to live at or near the start of the system crt0.c, and
2233 * we don't sweat the handful of bytes that might lose.
2234 */
2235 extern char **environ;
2236
2237 return ((char *) &environ);
2238 #else
2239 extern int data_start;
2240 return ((char *) &data_start);
2241 #endif /* ORDINARY_LINK */
2242 #endif /* DATA_START */
2243 }
2244 #endif /* NEED_STARTS (not CANNOT_DUMP or not SYSTEM_MALLOC) */
2245
2246 #ifndef CANNOT_DUMP
2247 /* Some systems that cannot dump also cannot implement these. */
2248
2249 /*
2250 * Return the address of the end of the text segment prior to
2251 * doing an unexec. After unexec the return value is undefined.
2252 */
2253
2254 char *
2255 end_of_text ()
2256 {
2257 #ifdef TEXT_END
2258 return ((char *) TEXT_END);
2259 #else
2260 extern int etext;
2261 return ((char *) &etext);
2262 #endif
2263 }
2264
2265 /*
2266 * Return the address of the end of the data segment prior to
2267 * doing an unexec. After unexec the return value is undefined.
2268 */
2269
2270 char *
2271 end_of_data ()
2272 {
2273 #ifdef DATA_END
2274 return ((char *) DATA_END);
2275 #else
2276 extern int edata;
2277 return ((char *) &edata);
2278 #endif
2279 }
2280
2281 #endif /* not CANNOT_DUMP */
2282 \f
2283 /* init_system_name sets up the string for the Lisp function
2284 system-name to return. */
2285
2286 #ifdef BSD4_1
2287 #include <whoami.h>
2288 #endif
2289
2290 extern Lisp_Object Vsystem_name;
2291
2292 #ifndef BSD4_1
2293 #ifndef VMS
2294 #ifdef HAVE_SOCKETS
2295 #include <sys/socket.h>
2296 #include <netdb.h>
2297 #endif /* HAVE_SOCKETS */
2298 #endif /* not VMS */
2299 #endif /* not BSD4_1 */
2300
2301 void
2302 init_system_name ()
2303 {
2304 #ifdef BSD4_1
2305 Vsystem_name = build_string (sysname);
2306 #else
2307 #ifdef VMS
2308 char *sp, *end;
2309 if ((sp = egetenv ("SYS$NODE")) == 0)
2310 Vsystem_name = build_string ("vax-vms");
2311 else if ((end = index (sp, ':')) == 0)
2312 Vsystem_name = build_string (sp);
2313 else
2314 Vsystem_name = make_string (sp, end - sp);
2315 #else
2316 #ifndef HAVE_GETHOSTNAME
2317 struct utsname uts;
2318 uname (&uts);
2319 Vsystem_name = build_string (uts.nodename);
2320 #else /* HAVE_GETHOSTNAME */
2321 unsigned int hostname_size = 256;
2322 char *hostname = (char *) alloca (hostname_size);
2323
2324 /* Try to get the host name; if the buffer is too short, try
2325 again. Apparently, the only indication gethostname gives of
2326 whether the buffer was large enough is the presence or absence
2327 of a '\0' in the string. Eech. */
2328 for (;;)
2329 {
2330 gethostname (hostname, hostname_size - 1);
2331 hostname[hostname_size - 1] = '\0';
2332
2333 /* Was the buffer large enough for the '\0'? */
2334 if (strlen (hostname) < hostname_size - 1)
2335 break;
2336
2337 hostname_size <<= 1;
2338 hostname = (char *) alloca (hostname_size);
2339 }
2340 #ifdef HAVE_SOCKETS
2341 /* Turn the hostname into the official, fully-qualified hostname.
2342 Don't do this if we're going to dump; this can confuse system
2343 libraries on some machines and make the dumped emacs core dump. */
2344 #ifndef CANNOT_DUMP
2345 if (initialized)
2346 #endif /* not CANNOT_DUMP */
2347 if (! index (hostname, '.'))
2348 {
2349 struct hostent *hp;
2350 int count;
2351 for (count = 0;; count++)
2352 {
2353 #ifdef TRY_AGAIN
2354 h_errno = 0;
2355 #endif
2356 hp = gethostbyname (hostname);
2357 #ifdef TRY_AGAIN
2358 if (! (hp == 0 && h_errno == TRY_AGAIN))
2359 #endif
2360 break;
2361 if (count >= 5)
2362 break;
2363 Fsleep_for (make_number (1), Qnil);
2364 }
2365 if (hp)
2366 {
2367 char *fqdn = (char *) hp->h_name;
2368 char *p;
2369
2370 if (!index (fqdn, '.'))
2371 {
2372 /* We still don't have a fully qualified domain name.
2373 Try to find one in the list of alternate names */
2374 char **alias = hp->h_aliases;
2375 while (*alias && !index (*alias, '.'))
2376 alias++;
2377 if (*alias)
2378 fqdn = *alias;
2379 }
2380 hostname = fqdn;
2381 #if 0
2382 /* Convert the host name to lower case. */
2383 /* Using ctype.h here would introduce a possible locale
2384 dependence that is probably wrong for hostnames. */
2385 p = hostname;
2386 while (*p)
2387 {
2388 if (*p >= 'A' && *p <= 'Z')
2389 *p += 'a' - 'A';
2390 p++;
2391 }
2392 #endif
2393 }
2394 }
2395 #endif /* HAVE_SOCKETS */
2396 /* We used to try using getdomainname here,
2397 but NIIBE Yutaka <gniibe@etl.go.jp> says that
2398 getdomainname gets the NIS/YP domain which often is not the same
2399 as in Internet domain name. */
2400 #if 0 /* Turned off because sysinfo is not really likely to return the
2401 correct Internet domain. */
2402 #if (HAVE_SYSINFO && defined (SI_SRPC_DOMAIN))
2403 if (! index (hostname, '.'))
2404 {
2405 /* The hostname is not fully qualified. Append the domain name. */
2406
2407 int hostlen = strlen (hostname);
2408 int domain_size = 256;
2409
2410 for (;;)
2411 {
2412 char *domain = (char *) alloca (domain_size + 1);
2413 char *fqdn = (char *) alloca (hostlen + 1 + domain_size + 1);
2414 int sys_domain_size = sysinfo (SI_SRPC_DOMAIN, domain, domain_size);
2415 if (sys_domain_size <= 0)
2416 break;
2417 if (domain_size < sys_domain_size)
2418 {
2419 domain_size = sys_domain_size;
2420 continue;
2421 }
2422 strcpy (fqdn, hostname);
2423 if (domain[0] == '.')
2424 strcpy (fqdn + hostlen, domain);
2425 else if (domain[0] != 0)
2426 {
2427 fqdn[hostlen] = '.';
2428 strcpy (fqdn + hostlen + 1, domain);
2429 }
2430 hostname = fqdn;
2431 break;
2432 }
2433 }
2434 #endif /* HAVE_SYSINFO && defined (SI_SRPC_DOMAIN) */
2435 #endif /* 0 */
2436 Vsystem_name = build_string (hostname);
2437 #endif /* HAVE_GETHOSTNAME */
2438 #endif /* VMS */
2439 #endif /* BSD4_1 */
2440 {
2441 unsigned char *p;
2442 for (p = XSTRING (Vsystem_name)->data; *p; p++)
2443 if (*p == ' ' || *p == '\t')
2444 *p = '-';
2445 }
2446 }
2447 \f
2448 #ifndef MSDOS
2449 #ifndef VMS
2450 #if !defined (HAVE_SELECT) || defined (BROKEN_SELECT_NON_X)
2451
2452 #include "sysselect.h"
2453 #undef select
2454
2455 #if defined (HAVE_X_WINDOWS) && !defined (HAVE_SELECT)
2456 /* Cause explanatory error message at compile time,
2457 since the select emulation is not good enough for X. */
2458 int *x = &x_windows_lose_if_no_select_system_call;
2459 #endif
2460
2461 /* Emulate as much as select as is possible under 4.1 and needed by Gnu Emacs
2462 * Only checks read descriptors.
2463 */
2464 /* How long to wait between checking fds in select */
2465 #define SELECT_PAUSE 1
2466 int select_alarmed;
2467
2468 /* For longjmp'ing back to read_input_waiting. */
2469
2470 jmp_buf read_alarm_throw;
2471
2472 /* Nonzero if the alarm signal should throw back to read_input_waiting.
2473 The read_socket_hook function sets this to 1 while it is waiting. */
2474
2475 int read_alarm_should_throw;
2476
2477 SIGTYPE
2478 select_alarm ()
2479 {
2480 select_alarmed = 1;
2481 #ifdef BSD4_1
2482 sigrelse (SIGALRM);
2483 #else /* not BSD4_1 */
2484 signal (SIGALRM, SIG_IGN);
2485 #endif /* not BSD4_1 */
2486 if (read_alarm_should_throw)
2487 longjmp (read_alarm_throw, 1);
2488 }
2489
2490 #ifndef WINDOWSNT
2491 /* Only rfds are checked. */
2492 int
2493 sys_select (nfds, rfds, wfds, efds, timeout)
2494 int nfds;
2495 SELECT_TYPE *rfds, *wfds, *efds;
2496 EMACS_TIME *timeout;
2497 {
2498 int ravail = 0;
2499 SELECT_TYPE orfds;
2500 int timeoutval;
2501 int *local_timeout;
2502 extern int proc_buffered_char[];
2503 #ifndef subprocesses
2504 int process_tick = 0, update_tick = 0;
2505 #else
2506 extern int process_tick, update_tick;
2507 #endif
2508 unsigned char buf;
2509
2510 #if defined (HAVE_SELECT) && defined (HAVE_X_WINDOWS)
2511 /* If we're using X, then the native select will work; we only need the
2512 emulation for non-X usage. */
2513 if (!NILP (Vwindow_system))
2514 return select (nfds, rfds, wfds, efds, timeout);
2515 #endif
2516 timeoutval = timeout ? EMACS_SECS (*timeout) : 100000;
2517 local_timeout = &timeoutval;
2518 FD_ZERO (&orfds);
2519 if (rfds)
2520 {
2521 orfds = *rfds;
2522 FD_ZERO (rfds);
2523 }
2524 if (wfds)
2525 FD_ZERO (wfds);
2526 if (efds)
2527 FD_ZERO (efds);
2528
2529 /* If we are looking only for the terminal, with no timeout,
2530 just read it and wait -- that's more efficient. */
2531 if (*local_timeout == 100000 && process_tick == update_tick
2532 && FD_ISSET (0, &orfds))
2533 {
2534 int fd;
2535 for (fd = 1; fd < nfds; ++fd)
2536 if (FD_ISSET (fd, &orfds))
2537 goto hardway;
2538 if (! detect_input_pending ())
2539 read_input_waiting ();
2540 FD_SET (0, rfds);
2541 return 1;
2542 }
2543
2544 hardway:
2545 /* Once a second, till the timer expires, check all the flagged read
2546 * descriptors to see if any input is available. If there is some then
2547 * set the corresponding bit in the return copy of rfds.
2548 */
2549 while (1)
2550 {
2551 register int to_check, fd;
2552
2553 if (rfds)
2554 {
2555 for (to_check = nfds, fd = 0; --to_check >= 0; fd++)
2556 {
2557 if (FD_ISSET (fd, &orfds))
2558 {
2559 int avail = 0, status = 0;
2560
2561 if (fd == 0)
2562 avail = detect_input_pending (); /* Special keyboard handler */
2563 else
2564 {
2565 #ifdef FIONREAD
2566 status = ioctl (fd, FIONREAD, &avail);
2567 #else /* no FIONREAD */
2568 /* Hoping it will return -1 if nothing available
2569 or 0 if all 0 chars requested are read. */
2570 if (proc_buffered_char[fd] >= 0)
2571 avail = 1;
2572 else
2573 {
2574 avail = read (fd, &buf, 1);
2575 if (avail > 0)
2576 proc_buffered_char[fd] = buf;
2577 }
2578 #endif /* no FIONREAD */
2579 }
2580 if (status >= 0 && avail > 0)
2581 {
2582 FD_SET (fd, rfds);
2583 ravail++;
2584 }
2585 }
2586 }
2587 }
2588 if (*local_timeout == 0 || ravail != 0 || process_tick != update_tick)
2589 break;
2590
2591 turn_on_atimers (0);
2592 signal (SIGALRM, select_alarm);
2593 select_alarmed = 0;
2594 alarm (SELECT_PAUSE);
2595
2596 /* Wait for a SIGALRM (or maybe a SIGTINT) */
2597 while (select_alarmed == 0 && *local_timeout != 0
2598 && process_tick == update_tick)
2599 {
2600 /* If we are interested in terminal input,
2601 wait by reading the terminal.
2602 That makes instant wakeup for terminal input at least. */
2603 if (FD_ISSET (0, &orfds))
2604 {
2605 read_input_waiting ();
2606 if (detect_input_pending ())
2607 select_alarmed = 1;
2608 }
2609 else
2610 pause ();
2611 }
2612 (*local_timeout) -= SELECT_PAUSE;
2613
2614 /* Reset the old alarm if there was one. */
2615 turn_on_atimers (1);
2616
2617 if (*local_timeout == 0) /* Stop on timer being cleared */
2618 break;
2619 }
2620 return ravail;
2621 }
2622 #endif /* not WINDOWSNT */
2623
2624 /* Read keyboard input into the standard buffer,
2625 waiting for at least one character. */
2626
2627 /* Make all keyboard buffers much bigger when using a window system. */
2628 #ifdef HAVE_WINDOW_SYSTEM
2629 #define BUFFER_SIZE_FACTOR 16
2630 #else
2631 #define BUFFER_SIZE_FACTOR 1
2632 #endif
2633
2634 void
2635 read_input_waiting ()
2636 {
2637 struct input_event e;
2638 int nread, i;
2639 extern int quit_char;
2640
2641 if (read_socket_hook)
2642 {
2643 struct input_event buf[256];
2644
2645 read_alarm_should_throw = 0;
2646 if (! setjmp (read_alarm_throw))
2647 nread = (*read_socket_hook) (0, buf, 256, 1);
2648 else
2649 nread = -1;
2650
2651 /* Scan the chars for C-g and store them in kbd_buffer. */
2652 for (i = 0; i < nread; i++)
2653 {
2654 kbd_buffer_store_event (&buf[i]);
2655 /* Don't look at input that follows a C-g too closely.
2656 This reduces lossage due to autorepeat on C-g. */
2657 if (buf[i].kind == ascii_keystroke
2658 && buf[i].code == quit_char)
2659 break;
2660 }
2661 }
2662 else
2663 {
2664 char buf[3];
2665 nread = read (fileno (stdin), buf, 1);
2666
2667 /* Scan the chars for C-g and store them in kbd_buffer. */
2668 e.kind = ascii_keystroke;
2669 e.frame_or_window = selected_frame;
2670 e.modifiers = 0;
2671 for (i = 0; i < nread; i++)
2672 {
2673 /* Convert chars > 0177 to meta events if desired.
2674 We do this under the same conditions that read_avail_input does. */
2675 if (read_socket_hook == 0)
2676 {
2677 /* If the user says she has a meta key, then believe her. */
2678 if (meta_key == 1 && (buf[i] & 0x80))
2679 e.modifiers = meta_modifier;
2680 if (meta_key != 2)
2681 buf[i] &= ~0x80;
2682 }
2683
2684 XSETINT (e.code, buf[i]);
2685 kbd_buffer_store_event (&e);
2686 /* Don't look at input that follows a C-g too closely.
2687 This reduces lossage due to autorepeat on C-g. */
2688 if (buf[i] == quit_char)
2689 break;
2690 }
2691 }
2692 }
2693
2694 #endif /* not HAVE_SELECT */
2695 #endif /* not VMS */
2696 #endif /* not MSDOS */
2697 \f
2698 #ifdef BSD4_1
2699 void
2700 init_sigio (fd)
2701 int fd;
2702 {
2703 if (noninteractive)
2704 return;
2705 lmode = LINTRUP | lmode;
2706 ioctl (fd, TIOCLSET, &lmode);
2707 }
2708
2709 void
2710 reset_sigio ()
2711 {
2712 if (noninteractive)
2713 return;
2714 lmode = ~LINTRUP & lmode;
2715 ioctl (0, TIOCLSET, &lmode);
2716 }
2717
2718 void
2719 request_sigio ()
2720 {
2721 sigrelse (SIGTINT);
2722
2723 interrupts_deferred = 0;
2724 }
2725
2726 void
2727 unrequest_sigio ()
2728 {
2729 sighold (SIGTINT);
2730
2731 interrupts_deferred = 1;
2732 }
2733
2734 /* still inside #ifdef BSD4_1 */
2735 #ifdef subprocesses
2736
2737 int sigheld; /* Mask of held signals */
2738
2739 void
2740 sigholdx (signum)
2741 int signum;
2742 {
2743 sigheld |= sigbit (signum);
2744 sighold (signum);
2745 }
2746
2747 void
2748 sigisheld (signum)
2749 int signum;
2750 {
2751 sigheld |= sigbit (signum);
2752 }
2753
2754 void
2755 sigunhold (signum)
2756 int signum;
2757 {
2758 sigheld &= ~sigbit (signum);
2759 sigrelse (signum);
2760 }
2761
2762 void
2763 sigfree () /* Free all held signals */
2764 {
2765 int i;
2766 for (i = 0; i < NSIG; i++)
2767 if (sigheld & sigbit (i))
2768 sigrelse (i);
2769 sigheld = 0;
2770 }
2771
2772 int
2773 sigbit (i)
2774 {
2775 return 1 << (i - 1);
2776 }
2777 #endif /* subprocesses */
2778 #endif /* BSD4_1 */
2779 \f
2780 /* POSIX signals support - DJB */
2781 /* Anyone with POSIX signals should have ANSI C declarations */
2782
2783 #ifdef POSIX_SIGNALS
2784
2785 sigset_t empty_mask, full_mask;
2786
2787 signal_handler_t
2788 sys_signal (int signal_number, signal_handler_t action)
2789 {
2790 struct sigaction new_action, old_action;
2791 sigemptyset (&new_action.sa_mask);
2792 new_action.sa_handler = action;
2793 #ifdef SA_RESTART
2794 /* Emacs mostly works better with restartable system services. If this
2795 * flag exists, we probably want to turn it on here.
2796 */
2797 new_action.sa_flags = SA_RESTART;
2798 #else
2799 new_action.sa_flags = 0;
2800 #endif
2801 sigaction (signal_number, &new_action, &old_action);
2802 return (old_action.sa_handler);
2803 }
2804
2805 #ifndef __GNUC__
2806 /* If we're compiling with GCC, we don't need this function, since it
2807 can be written as a macro. */
2808 sigset_t
2809 sys_sigmask (int sig)
2810 {
2811 sigset_t mask;
2812 sigemptyset (&mask);
2813 sigaddset (&mask, sig);
2814 return mask;
2815 }
2816 #endif
2817
2818 /* I'd like to have these guys return pointers to the mask storage in here,
2819 but there'd be trouble if the code was saving multiple masks. I'll be
2820 safe and pass the structure. It normally won't be more than 2 bytes
2821 anyhow. - DJB */
2822
2823 sigset_t
2824 sys_sigblock (sigset_t new_mask)
2825 {
2826 sigset_t old_mask;
2827 sigprocmask (SIG_BLOCK, &new_mask, &old_mask);
2828 return (old_mask);
2829 }
2830
2831 sigset_t
2832 sys_sigunblock (sigset_t new_mask)
2833 {
2834 sigset_t old_mask;
2835 sigprocmask (SIG_UNBLOCK, &new_mask, &old_mask);
2836 return (old_mask);
2837 }
2838
2839 sigset_t
2840 sys_sigsetmask (sigset_t new_mask)
2841 {
2842 sigset_t old_mask;
2843 sigprocmask (SIG_SETMASK, &new_mask, &old_mask);
2844 return (old_mask);
2845 }
2846
2847 #endif /* POSIX_SIGNALS */
2848 \f
2849 #if !defined HAVE_STRSIGNAL && !defined SYS_SIGLIST_DECLARED
2850 static char *my_sys_siglist[NSIG];
2851 # ifdef sys_siglist
2852 # undef sys_siglist
2853 # endif
2854 # define sys_siglist my_sys_siglist
2855 #endif
2856
2857 void
2858 init_signals ()
2859 {
2860 #ifdef POSIX_SIGNALS
2861 sigemptyset (&empty_mask);
2862 sigfillset (&full_mask);
2863 #endif
2864
2865 #if !defined HAVE_STRSIGNAL && !defined SYS_SIGLIST_DECLARED
2866 if (! initialized)
2867 {
2868 # ifdef SIGABRT
2869 sys_siglist[SIGABRT] = "Aborted";
2870 # endif
2871 # ifdef SIGAIO
2872 sys_siglist[SIGAIO] = "LAN I/O interrupt";
2873 # endif
2874 # ifdef SIGALRM
2875 sys_siglist[SIGALRM] = "Alarm clock";
2876 # endif
2877 # ifdef SIGBUS
2878 sys_siglist[SIGBUS] = "Bus error";
2879 # endif
2880 # ifdef SIGCLD
2881 sys_siglist[SIGCLD] = "Child status changed";
2882 # endif
2883 # ifdef SIGCHLD
2884 sys_siglist[SIGCHLD] = "Child status changed";
2885 # endif
2886 # ifdef SIGCONT
2887 sys_siglist[SIGCONT] = "Continued";
2888 # endif
2889 # ifdef SIGDANGER
2890 sys_siglist[SIGDANGER] = "Swap space dangerously low";
2891 # endif
2892 # ifdef SIGDGNOTIFY
2893 sys_siglist[SIGDGNOTIFY] = "Notification message in queue";
2894 # endif
2895 # ifdef SIGEMT
2896 sys_siglist[SIGEMT] = "Emulation trap";
2897 # endif
2898 # ifdef SIGFPE
2899 sys_siglist[SIGFPE] = "Arithmetic exception";
2900 # endif
2901 # ifdef SIGFREEZE
2902 sys_siglist[SIGFREEZE] = "SIGFREEZE";
2903 # endif
2904 # ifdef SIGGRANT
2905 sys_siglist[SIGGRANT] = "Monitor mode granted";
2906 # endif
2907 # ifdef SIGHUP
2908 sys_siglist[SIGHUP] = "Hangup";
2909 # endif
2910 # ifdef SIGILL
2911 sys_siglist[SIGILL] = "Illegal instruction";
2912 # endif
2913 # ifdef SIGINT
2914 sys_siglist[SIGINT] = "Interrupt";
2915 # endif
2916 # ifdef SIGIO
2917 sys_siglist[SIGIO] = "I/O possible";
2918 # endif
2919 # ifdef SIGIOINT
2920 sys_siglist[SIGIOINT] = "I/O intervention required";
2921 # endif
2922 # ifdef SIGIOT
2923 sys_siglist[SIGIOT] = "IOT trap";
2924 # endif
2925 # ifdef SIGKILL
2926 sys_siglist[SIGKILL] = "Killed";
2927 # endif
2928 # ifdef SIGLOST
2929 sys_siglist[SIGLOST] = "Resource lost";
2930 # endif
2931 # ifdef SIGLWP
2932 sys_siglist[SIGLWP] = "SIGLWP";
2933 # endif
2934 # ifdef SIGMSG
2935 sys_siglist[SIGMSG] = "Monitor mode data available";
2936 # endif
2937 # ifdef SIGPHONE
2938 sys_siglist[SIGWIND] = "SIGPHONE";
2939 # endif
2940 # ifdef SIGPIPE
2941 sys_siglist[SIGPIPE] = "Broken pipe";
2942 # endif
2943 # ifdef SIGPOLL
2944 sys_siglist[SIGPOLL] = "Pollable event occurred";
2945 # endif
2946 # ifdef SIGPROF
2947 sys_siglist[SIGPROF] = "Profiling timer expired";
2948 # endif
2949 # ifdef SIGPTY
2950 sys_siglist[SIGPTY] = "PTY I/O interrupt";
2951 # endif
2952 # ifdef SIGPWR
2953 sys_siglist[SIGPWR] = "Power-fail restart";
2954 # endif
2955 # ifdef SIGQUIT
2956 sys_siglist[SIGQUIT] = "Quit";
2957 # endif
2958 # ifdef SIGRETRACT
2959 sys_siglist[SIGRETRACT] = "Need to relinguish monitor mode";
2960 # endif
2961 # ifdef SIGSAK
2962 sys_siglist[SIGSAK] = "Secure attention";
2963 # endif
2964 # ifdef SIGSEGV
2965 sys_siglist[SIGSEGV] = "Segmentation violation";
2966 # endif
2967 # ifdef SIGSOUND
2968 sys_siglist[SIGSOUND] = "Sound completed";
2969 # endif
2970 # ifdef SIGSTOP
2971 sys_siglist[SIGSTOP] = "Stopped (signal)";
2972 # endif
2973 # ifdef SIGSTP
2974 sys_siglist[SIGSTP] = "Stopped (user)";
2975 # endif
2976 # ifdef SIGSYS
2977 sys_siglist[SIGSYS] = "Bad argument to system call";
2978 # endif
2979 # ifdef SIGTERM
2980 sys_siglist[SIGTERM] = "Terminated";
2981 # endif
2982 # ifdef SIGTHAW
2983 sys_siglist[SIGTHAW] = "SIGTHAW";
2984 # endif
2985 # ifdef SIGTRAP
2986 sys_siglist[SIGTRAP] = "Trace/breakpoint trap";
2987 # endif
2988 # ifdef SIGTSTP
2989 sys_siglist[SIGTSTP] = "Stopped (user)";
2990 # endif
2991 # ifdef SIGTTIN
2992 sys_siglist[SIGTTIN] = "Stopped (tty input)";
2993 # endif
2994 # ifdef SIGTTOU
2995 sys_siglist[SIGTTOU] = "Stopped (tty output)";
2996 # endif
2997 # ifdef SIGURG
2998 sys_siglist[SIGURG] = "Urgent I/O condition";
2999 # endif
3000 # ifdef SIGUSR1
3001 sys_siglist[SIGUSR1] = "User defined signal 1";
3002 # endif
3003 # ifdef SIGUSR2
3004 sys_siglist[SIGUSR2] = "User defined signal 2";
3005 # endif
3006 # ifdef SIGVTALRM
3007 sys_siglist[SIGVTALRM] = "Virtual timer expired";
3008 # endif
3009 # ifdef SIGWAITING
3010 sys_siglist[SIGWAITING] = "Process's LWPs are blocked";
3011 # endif
3012 # ifdef SIGWINCH
3013 sys_siglist[SIGWINCH] = "Window size changed";
3014 # endif
3015 # ifdef SIGWIND
3016 sys_siglist[SIGWIND] = "SIGWIND";
3017 # endif
3018 # ifdef SIGXCPU
3019 sys_siglist[SIGXCPU] = "CPU time limit exceeded";
3020 # endif
3021 # ifdef SIGXFSZ
3022 sys_siglist[SIGXFSZ] = "File size limit exceeded";
3023 # endif
3024 }
3025 #endif /* !defined HAVE_STRSIGNAL && !defined SYS_SIGLIST_DECLARED */
3026 }
3027 \f
3028 #ifndef HAVE_RANDOM
3029 #ifdef random
3030 #define HAVE_RANDOM
3031 #endif
3032 #endif
3033
3034 /* Figure out how many bits the system's random number generator uses.
3035 `random' and `lrand48' are assumed to return 31 usable bits.
3036 BSD `rand' returns a 31 bit value but the low order bits are unusable;
3037 so we'll shift it and treat it like the 15-bit USG `rand'. */
3038
3039 #ifndef RAND_BITS
3040 # ifdef HAVE_RANDOM
3041 # define RAND_BITS 31
3042 # else /* !HAVE_RANDOM */
3043 # ifdef HAVE_LRAND48
3044 # define RAND_BITS 31
3045 # define random lrand48
3046 # else /* !HAVE_LRAND48 */
3047 # define RAND_BITS 15
3048 # if RAND_MAX == 32767
3049 # define random rand
3050 # else /* RAND_MAX != 32767 */
3051 # if RAND_MAX == 2147483647
3052 # define random() (rand () >> 16)
3053 # else /* RAND_MAX != 2147483647 */
3054 # ifdef USG
3055 # define random rand
3056 # else
3057 # define random() (rand () >> 16)
3058 # endif /* !USG */
3059 # endif /* RAND_MAX != 2147483647 */
3060 # endif /* RAND_MAX != 32767 */
3061 # endif /* !HAVE_LRAND48 */
3062 # endif /* !HAVE_RANDOM */
3063 #endif /* !RAND_BITS */
3064
3065 void
3066 seed_random (arg)
3067 long arg;
3068 {
3069 #ifdef HAVE_RANDOM
3070 srandom ((unsigned int)arg);
3071 #else
3072 # ifdef HAVE_LRAND48
3073 srand48 (arg);
3074 # else
3075 srand ((unsigned int)arg);
3076 # endif
3077 #endif
3078 }
3079
3080 /*
3081 * Build a full Emacs-sized word out of whatever we've got.
3082 * This suffices even for a 64-bit architecture with a 15-bit rand.
3083 */
3084 long
3085 get_random ()
3086 {
3087 long val = random ();
3088 #if VALBITS > RAND_BITS
3089 val = (val << RAND_BITS) ^ random ();
3090 #if VALBITS > 2*RAND_BITS
3091 val = (val << RAND_BITS) ^ random ();
3092 #if VALBITS > 3*RAND_BITS
3093 val = (val << RAND_BITS) ^ random ();
3094 #if VALBITS > 4*RAND_BITS
3095 val = (val << RAND_BITS) ^ random ();
3096 #endif /* need at least 5 */
3097 #endif /* need at least 4 */
3098 #endif /* need at least 3 */
3099 #endif /* need at least 2 */
3100 return val & ((1L << VALBITS) - 1);
3101 }
3102 \f
3103 #ifdef WRONG_NAME_INSQUE
3104
3105 insque (q,p)
3106 caddr_t q,p;
3107 {
3108 _insque (q,p);
3109 }
3110
3111 #endif
3112 \f
3113 #ifdef VMS
3114
3115 #ifdef getenv
3116 /* If any place else asks for the TERM variable,
3117 allow it to be overridden with the EMACS_TERM variable
3118 before attempting to translate the logical name TERM. As a last
3119 resort, ask for VAX C's special idea of the TERM variable. */
3120 #undef getenv
3121 char *
3122 sys_getenv (name)
3123 char *name;
3124 {
3125 register char *val;
3126 static char buf[256];
3127 static struct dsc$descriptor_s equiv
3128 = {sizeof (buf), DSC$K_DTYPE_T, DSC$K_CLASS_S, buf};
3129 static struct dsc$descriptor_s d_name
3130 = {0, DSC$K_DTYPE_T, DSC$K_CLASS_S, 0};
3131 short eqlen;
3132
3133 if (!strcmp (name, "TERM"))
3134 {
3135 val = (char *) getenv ("EMACS_TERM");
3136 if (val)
3137 return val;
3138 }
3139
3140 d_name.dsc$w_length = strlen (name);
3141 d_name.dsc$a_pointer = name;
3142 if (LIB$SYS_TRNLOG (&d_name, &eqlen, &equiv) == 1)
3143 {
3144 char *str = (char *) xmalloc (eqlen + 1);
3145 bcopy (buf, str, eqlen);
3146 str[eqlen] = '\0';
3147 /* This is a storage leak, but a pain to fix. With luck,
3148 no one will ever notice. */
3149 return str;
3150 }
3151 return (char *) getenv (name);
3152 }
3153 #endif /* getenv */
3154
3155 #ifdef abort
3156 /* Since VMS doesn't believe in core dumps, the only way to debug this beast is
3157 to force a call on the debugger from within the image. */
3158 #undef abort
3159 sys_abort ()
3160 {
3161 reset_sys_modes ();
3162 LIB$SIGNAL (SS$_DEBUG);
3163 }
3164 #endif /* abort */
3165 #endif /* VMS */
3166 \f
3167 #ifdef VMS
3168 #ifdef LINK_CRTL_SHARE
3169 #ifdef SHARABLE_LIB_BUG
3170 /* Variables declared noshare and initialized in sharable libraries
3171 cannot be shared. The VMS linker incorrectly forces you to use a private
3172 version which is uninitialized... If not for this "feature", we
3173 could use the C library definition of sys_nerr and sys_errlist. */
3174 int sys_nerr = 35;
3175 char *sys_errlist[] =
3176 {
3177 "error 0",
3178 "not owner",
3179 "no such file or directory",
3180 "no such process",
3181 "interrupted system call",
3182 "i/o error",
3183 "no such device or address",
3184 "argument list too long",
3185 "exec format error",
3186 "bad file number",
3187 "no child process",
3188 "no more processes",
3189 "not enough memory",
3190 "permission denied",
3191 "bad address",
3192 "block device required",
3193 "mount devices busy",
3194 "file exists",
3195 "cross-device link",
3196 "no such device",
3197 "not a directory",
3198 "is a directory",
3199 "invalid argument",
3200 "file table overflow",
3201 "too many open files",
3202 "not a typewriter",
3203 "text file busy",
3204 "file too big",
3205 "no space left on device",
3206 "illegal seek",
3207 "read-only file system",
3208 "too many links",
3209 "broken pipe",
3210 "math argument",
3211 "result too large",
3212 "I/O stream empty",
3213 "vax/vms specific error code nontranslatable error"
3214 };
3215 #endif /* SHARABLE_LIB_BUG */
3216 #endif /* LINK_CRTL_SHARE */
3217 #endif /* VMS */
3218
3219 #ifndef HAVE_STRERROR
3220 #ifndef WINDOWSNT
3221 char *
3222 strerror (errnum)
3223 int errnum;
3224 {
3225 extern char *sys_errlist[];
3226 extern int sys_nerr;
3227
3228 if (errnum >= 0 && errnum < sys_nerr)
3229 return sys_errlist[errnum];
3230 return (char *) "Unknown error";
3231 }
3232 #endif /* not WINDOWSNT */
3233 #endif /* ! HAVE_STRERROR */
3234 \f
3235 int
3236 emacs_open (path, oflag, mode)
3237 char *path;
3238 int oflag, mode;
3239 {
3240 register int rtnval;
3241
3242 #ifdef BSD4_1
3243 if (oflag & O_CREAT)
3244 return creat (path, mode);
3245 #endif
3246
3247 while ((rtnval = open (path, oflag, mode)) == -1
3248 && (errno == EINTR));
3249 return (rtnval);
3250 }
3251
3252 int
3253 emacs_close (fd)
3254 int fd;
3255 {
3256 int did_retry = 0;
3257 register int rtnval;
3258
3259 while ((rtnval = close (fd)) == -1
3260 && (errno == EINTR))
3261 did_retry = 1;
3262
3263 /* If close is interrupted SunOS 4.1 may or may not have closed the
3264 file descriptor. If it did the second close will fail with
3265 errno = EBADF. That means we have succeeded. */
3266 if (rtnval == -1 && did_retry && errno == EBADF)
3267 return 0;
3268
3269 return rtnval;
3270 }
3271
3272 int
3273 emacs_read (fildes, buf, nbyte)
3274 int fildes;
3275 char *buf;
3276 unsigned int nbyte;
3277 {
3278 register int rtnval;
3279
3280 while ((rtnval = read (fildes, buf, nbyte)) == -1
3281 && (errno == EINTR));
3282 return (rtnval);
3283 }
3284
3285 int
3286 emacs_write (fildes, buf, nbyte)
3287 int fildes;
3288 char *buf;
3289 unsigned int nbyte;
3290 {
3291 register int rtnval, bytes_written;
3292
3293 bytes_written = 0;
3294
3295 while (nbyte > 0)
3296 {
3297 rtnval = write (fildes, buf, nbyte);
3298
3299 if (rtnval == -1)
3300 {
3301 if (errno == EINTR)
3302 continue;
3303 else
3304 return (bytes_written ? bytes_written : -1);
3305 }
3306
3307 buf += rtnval;
3308 nbyte -= rtnval;
3309 bytes_written += rtnval;
3310 }
3311 return (bytes_written);
3312 }
3313 \f
3314 #ifdef USG
3315 /*
3316 * All of the following are for USG.
3317 *
3318 * On USG systems the system calls are INTERRUPTIBLE by signals
3319 * that the user program has elected to catch. Thus the system call
3320 * must be retried in these cases. To handle this without massive
3321 * changes in the source code, we remap the standard system call names
3322 * to names for our own functions in sysdep.c that do the system call
3323 * with retries. Actually, for portability reasons, it is good
3324 * programming practice, as this example shows, to limit all actual
3325 * system calls to a single occurrence in the source. Sure, this
3326 * adds an extra level of function call overhead but it is almost
3327 * always negligible. Fred Fish, Unisoft Systems Inc.
3328 */
3329
3330 /*
3331 * Warning, this function may not duplicate 4.2 action properly
3332 * under error conditions.
3333 */
3334
3335 #ifndef MAXPATHLEN
3336 /* In 4.1, param.h fails to define this. */
3337 #define MAXPATHLEN 1024
3338 #endif
3339
3340 #ifndef HAVE_GETWD
3341
3342 char *
3343 getwd (pathname)
3344 char *pathname;
3345 {
3346 char *npath, *spath;
3347 extern char *getcwd ();
3348
3349 BLOCK_INPUT; /* getcwd uses malloc */
3350 spath = npath = getcwd ((char *) 0, MAXPATHLEN);
3351 if (spath == 0)
3352 return spath;
3353 /* On Altos 3068, getcwd can return @hostname/dir, so discard
3354 up to first slash. Should be harmless on other systems. */
3355 while (*npath && *npath != '/')
3356 npath++;
3357 strcpy (pathname, npath);
3358 free (spath); /* getcwd uses malloc */
3359 UNBLOCK_INPUT;
3360 return pathname;
3361 }
3362
3363 #endif /* HAVE_GETWD */
3364
3365 /*
3366 * Emulate rename using unlink/link. Note that this is
3367 * only partially correct. Also, doesn't enforce restriction
3368 * that files be of same type (regular->regular, dir->dir, etc).
3369 */
3370
3371 #ifndef HAVE_RENAME
3372
3373 rename (from, to)
3374 const char *from;
3375 const char *to;
3376 {
3377 if (access (from, 0) == 0)
3378 {
3379 unlink (to);
3380 if (link (from, to) == 0)
3381 if (unlink (from) == 0)
3382 return (0);
3383 }
3384 return (-1);
3385 }
3386
3387 #endif
3388
3389
3390 #ifdef HPUX
3391 #ifndef HAVE_PERROR
3392
3393 /* HPUX curses library references perror, but as far as we know
3394 it won't be called. Anyway this definition will do for now. */
3395
3396 perror ()
3397 {
3398 }
3399
3400 #endif /* not HAVE_PERROR */
3401 #endif /* HPUX */
3402
3403 #ifndef HAVE_DUP2
3404
3405 /*
3406 * Emulate BSD dup2. First close newd if it already exists.
3407 * Then, attempt to dup oldd. If not successful, call dup2 recursively
3408 * until we are, then close the unsuccessful ones.
3409 */
3410
3411 dup2 (oldd, newd)
3412 int oldd;
3413 int newd;
3414 {
3415 register int fd, ret;
3416
3417 emacs_close (newd);
3418
3419 #ifdef F_DUPFD
3420 return fcntl (oldd, F_DUPFD, newd);
3421 #else
3422 fd = dup (old);
3423 if (fd == -1)
3424 return -1;
3425 if (fd == new)
3426 return new;
3427 ret = dup2 (old,new);
3428 emacs_close (fd);
3429 return ret;
3430 #endif
3431 }
3432
3433 #endif /* not HAVE_DUP2 */
3434
3435 /*
3436 * Gettimeofday. Simulate as much as possible. Only accurate
3437 * to nearest second. Emacs doesn't use tzp so ignore it for now.
3438 * Only needed when subprocesses are defined.
3439 */
3440
3441 #ifdef subprocesses
3442 #ifndef VMS
3443 #ifndef HAVE_GETTIMEOFDAY
3444 #ifdef HAVE_TIMEVAL
3445
3446 /* ARGSUSED */
3447 int
3448 gettimeofday (tp, tzp)
3449 struct timeval *tp;
3450 struct timezone *tzp;
3451 {
3452 extern long time ();
3453
3454 tp->tv_sec = time ((long *)0);
3455 tp->tv_usec = 0;
3456 if (tzp != 0)
3457 tzp->tz_minuteswest = -1;
3458 return 0;
3459 }
3460
3461 #endif
3462 #endif
3463 #endif
3464 #endif /* subprocess && !HAVE_GETTIMEOFDAY && HAVE_TIMEVAL && !VMS */
3465
3466 /*
3467 * This function will go away as soon as all the stubs fixed. (fnf)
3468 */
3469
3470 void
3471 croak (badfunc)
3472 char *badfunc;
3473 {
3474 printf ("%s not yet implemented\r\n", badfunc);
3475 reset_sys_modes ();
3476 exit (1);
3477 }
3478
3479 #endif /* USG */
3480 \f
3481 /* Directory routines for systems that don't have them. */
3482
3483 #ifdef SYSV_SYSTEM_DIR
3484
3485 #include <dirent.h>
3486
3487 #if defined (BROKEN_CLOSEDIR) || !defined (HAVE_CLOSEDIR)
3488
3489 int
3490 closedir (dirp)
3491 register DIR *dirp; /* stream from opendir */
3492 {
3493 int rtnval;
3494
3495 rtnval = emacs_close (dirp->dd_fd);
3496
3497 /* Some systems (like Solaris) allocate the buffer and the DIR all
3498 in one block. Why in the world are we freeing this ourselves
3499 anyway? */
3500 #if ! (defined (sun) && defined (USG5_4))
3501 xfree ((char *) dirp->dd_buf); /* directory block defined in <dirent.h> */
3502 #endif
3503 xfree ((char *) dirp);
3504
3505 return rtnval;
3506 }
3507 #endif /* BROKEN_CLOSEDIR or not HAVE_CLOSEDIR */
3508 #endif /* SYSV_SYSTEM_DIR */
3509
3510 #ifdef NONSYSTEM_DIR_LIBRARY
3511
3512 DIR *
3513 opendir (filename)
3514 char *filename; /* name of directory */
3515 {
3516 register DIR *dirp; /* -> malloc'ed storage */
3517 register int fd; /* file descriptor for read */
3518 struct stat sbuf; /* result of fstat */
3519
3520 fd = emacs_open (filename, O_RDONLY, 0);
3521 if (fd < 0)
3522 return 0;
3523
3524 BLOCK_INPUT;
3525 if (fstat (fd, &sbuf) < 0
3526 || (sbuf.st_mode & S_IFMT) != S_IFDIR
3527 || (dirp = (DIR *) malloc (sizeof (DIR))) == 0)
3528 {
3529 emacs_close (fd);
3530 UNBLOCK_INPUT;
3531 return 0; /* bad luck today */
3532 }
3533 UNBLOCK_INPUT;
3534
3535 dirp->dd_fd = fd;
3536 dirp->dd_loc = dirp->dd_size = 0; /* refill needed */
3537
3538 return dirp;
3539 }
3540
3541 void
3542 closedir (dirp)
3543 register DIR *dirp; /* stream from opendir */
3544 {
3545 emacs_close (dirp->dd_fd);
3546 xfree ((char *) dirp);
3547 }
3548
3549
3550 #ifndef VMS
3551 #define DIRSIZ 14
3552 struct olddir
3553 {
3554 ino_t od_ino; /* inode */
3555 char od_name[DIRSIZ]; /* filename */
3556 };
3557 #endif /* not VMS */
3558
3559 struct direct dir_static; /* simulated directory contents */
3560
3561 /* ARGUSED */
3562 struct direct *
3563 readdir (dirp)
3564 register DIR *dirp; /* stream from opendir */
3565 {
3566 #ifndef VMS
3567 register struct olddir *dp; /* -> directory data */
3568 #else /* VMS */
3569 register struct dir$_name *dp; /* -> directory data */
3570 register struct dir$_version *dv; /* -> version data */
3571 #endif /* VMS */
3572
3573 for (; ;)
3574 {
3575 if (dirp->dd_loc >= dirp->dd_size)
3576 dirp->dd_loc = dirp->dd_size = 0;
3577
3578 if (dirp->dd_size == 0 /* refill buffer */
3579 && (dirp->dd_size = emacs_read (dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ)) <= 0)
3580 return 0;
3581
3582 #ifndef VMS
3583 dp = (struct olddir *) &dirp->dd_buf[dirp->dd_loc];
3584 dirp->dd_loc += sizeof (struct olddir);
3585
3586 if (dp->od_ino != 0) /* not deleted entry */
3587 {
3588 dir_static.d_ino = dp->od_ino;
3589 strncpy (dir_static.d_name, dp->od_name, DIRSIZ);
3590 dir_static.d_name[DIRSIZ] = '\0';
3591 dir_static.d_namlen = strlen (dir_static.d_name);
3592 dir_static.d_reclen = sizeof (struct direct)
3593 - MAXNAMLEN + 3
3594 + dir_static.d_namlen - dir_static.d_namlen % 4;
3595 return &dir_static; /* -> simulated structure */
3596 }
3597 #else /* VMS */
3598 dp = (struct dir$_name *) dirp->dd_buf;
3599 if (dirp->dd_loc == 0)
3600 dirp->dd_loc = (dp->dir$b_namecount&1) ? dp->dir$b_namecount + 1
3601 : dp->dir$b_namecount;
3602 dv = (struct dir$_version *)&dp->dir$t_name[dirp->dd_loc];
3603 dir_static.d_ino = dv->dir$w_fid_num;
3604 dir_static.d_namlen = dp->dir$b_namecount;
3605 dir_static.d_reclen = sizeof (struct direct)
3606 - MAXNAMLEN + 3
3607 + dir_static.d_namlen - dir_static.d_namlen % 4;
3608 strncpy (dir_static.d_name, dp->dir$t_name, dp->dir$b_namecount);
3609 dir_static.d_name[dir_static.d_namlen] = '\0';
3610 dirp->dd_loc = dirp->dd_size; /* only one record at a time */
3611 return &dir_static;
3612 #endif /* VMS */
3613 }
3614 }
3615
3616 #ifdef VMS
3617 /* readdirver is just like readdir except it returns all versions of a file
3618 as separate entries. */
3619
3620 /* ARGUSED */
3621 struct direct *
3622 readdirver (dirp)
3623 register DIR *dirp; /* stream from opendir */
3624 {
3625 register struct dir$_name *dp; /* -> directory data */
3626 register struct dir$_version *dv; /* -> version data */
3627
3628 if (dirp->dd_loc >= dirp->dd_size - sizeof (struct dir$_name))
3629 dirp->dd_loc = dirp->dd_size = 0;
3630
3631 if (dirp->dd_size == 0 /* refill buffer */
3632 && (dirp->dd_size = sys_read (dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ)) <= 0)
3633 return 0;
3634
3635 dp = (struct dir$_name *) dirp->dd_buf;
3636 if (dirp->dd_loc == 0)
3637 dirp->dd_loc = (dp->dir$b_namecount & 1) ? dp->dir$b_namecount + 1
3638 : dp->dir$b_namecount;
3639 dv = (struct dir$_version *) &dp->dir$t_name[dirp->dd_loc];
3640 strncpy (dir_static.d_name, dp->dir$t_name, dp->dir$b_namecount);
3641 sprintf (&dir_static.d_name[dp->dir$b_namecount], ";%d", dv->dir$w_version);
3642 dir_static.d_namlen = strlen (dir_static.d_name);
3643 dir_static.d_ino = dv->dir$w_fid_num;
3644 dir_static.d_reclen = sizeof (struct direct) - MAXNAMLEN + 3
3645 + dir_static.d_namlen - dir_static.d_namlen % 4;
3646 dirp->dd_loc = ((char *) (++dv) - dp->dir$t_name);
3647 return &dir_static;
3648 }
3649
3650 #endif /* VMS */
3651
3652 #endif /* NONSYSTEM_DIR_LIBRARY */
3653
3654 \f
3655 int
3656 set_file_times (filename, atime, mtime)
3657 char *filename;
3658 EMACS_TIME atime, mtime;
3659 {
3660 #ifdef HAVE_UTIMES
3661 struct timeval tv[2];
3662 tv[0] = atime;
3663 tv[1] = mtime;
3664 return utimes (filename, tv);
3665 #else /* not HAVE_UTIMES */
3666 struct utimbuf utb;
3667 utb.actime = EMACS_SECS (atime);
3668 utb.modtime = EMACS_SECS (mtime);
3669 return utime (filename, &utb);
3670 #endif /* not HAVE_UTIMES */
3671 }
3672 \f
3673 /* mkdir and rmdir functions, for systems which don't have them. */
3674
3675 #ifndef HAVE_MKDIR
3676 /*
3677 * Written by Robert Rother, Mariah Corporation, August 1985.
3678 *
3679 * If you want it, it's yours. All I ask in return is that if you
3680 * figure out how to do this in a Bourne Shell script you send me
3681 * a copy.
3682 * sdcsvax!rmr or rmr@uscd
3683 *
3684 * Severely hacked over by John Gilmore to make a 4.2BSD compatible
3685 * subroutine. 11Mar86; hoptoad!gnu
3686 *
3687 * Modified by rmtodd@uokmax 6-28-87 -- when making an already existing dir,
3688 * subroutine didn't return EEXIST. It does now.
3689 */
3690
3691 /*
3692 * Make a directory.
3693 */
3694 #ifdef MKDIR_PROTOTYPE
3695 MKDIR_PROTOTYPE
3696 #else
3697 int
3698 mkdir (dpath, dmode)
3699 char *dpath;
3700 int dmode;
3701 #endif
3702 {
3703 int cpid, status, fd;
3704 struct stat statbuf;
3705
3706 if (stat (dpath, &statbuf) == 0)
3707 {
3708 errno = EEXIST; /* Stat worked, so it already exists */
3709 return -1;
3710 }
3711
3712 /* If stat fails for a reason other than non-existence, return error */
3713 if (errno != ENOENT)
3714 return -1;
3715
3716 synch_process_alive = 1;
3717 switch (cpid = fork ())
3718 {
3719
3720 case -1: /* Error in fork */
3721 return (-1); /* Errno is set already */
3722
3723 case 0: /* Child process */
3724 /*
3725 * Cheap hack to set mode of new directory. Since this
3726 * child process is going away anyway, we zap its umask.
3727 * FIXME, this won't suffice to set SUID, SGID, etc. on this
3728 * directory. Does anybody care?
3729 */
3730 status = umask (0); /* Get current umask */
3731 status = umask (status | (0777 & ~dmode)); /* Set for mkdir */
3732 fd = emacs_open ("/dev/null", O_RDWR, 0);
3733 if (fd >= 0)
3734 {
3735 dup2 (fd, 0);
3736 dup2 (fd, 1);
3737 dup2 (fd, 2);
3738 }
3739 execl ("/bin/mkdir", "mkdir", dpath, (char *) 0);
3740 _exit (-1); /* Can't exec /bin/mkdir */
3741
3742 default: /* Parent process */
3743 wait_for_termination (cpid);
3744 }
3745
3746 if (synch_process_death != 0 || synch_process_retcode != 0)
3747 {
3748 errno = EIO; /* We don't know why, but */
3749 return -1; /* /bin/mkdir failed */
3750 }
3751
3752 return 0;
3753 }
3754 #endif /* not HAVE_MKDIR */
3755
3756 #ifndef HAVE_RMDIR
3757 int
3758 rmdir (dpath)
3759 char *dpath;
3760 {
3761 int cpid, status, fd;
3762 struct stat statbuf;
3763
3764 if (stat (dpath, &statbuf) != 0)
3765 {
3766 /* Stat just set errno. We don't have to */
3767 return -1;
3768 }
3769
3770 synch_process_alive = 1;
3771 switch (cpid = fork ())
3772 {
3773
3774 case -1: /* Error in fork */
3775 return (-1); /* Errno is set already */
3776
3777 case 0: /* Child process */
3778 fd = emacs_open ("/dev/null", O_RDWR, 0);
3779 if (fd >= 0)
3780 {
3781 dup2 (fd, 0);
3782 dup2 (fd, 1);
3783 dup2 (fd, 2);
3784 }
3785 execl ("/bin/rmdir", "rmdir", dpath, (char *) 0);
3786 _exit (-1); /* Can't exec /bin/rmdir */
3787
3788 default: /* Parent process */
3789 wait_for_termination (cpid);
3790 }
3791
3792 if (synch_process_death != 0 || synch_process_retcode != 0)
3793 {
3794 errno = EIO; /* We don't know why, but */
3795 return -1; /* /bin/rmdir failed */
3796 }
3797
3798 return 0;
3799 }
3800 #endif /* !HAVE_RMDIR */
3801
3802
3803 \f
3804 /* Functions for VMS */
3805 #ifdef VMS
3806 #include "vms-pwd.h"
3807 #include <acldef.h>
3808 #include <chpdef.h>
3809 #include <jpidef.h>
3810
3811 /* Return as a string the VMS error string pertaining to STATUS.
3812 Reuses the same static buffer each time it is called. */
3813
3814 char *
3815 vmserrstr (status)
3816 int status; /* VMS status code */
3817 {
3818 int bufadr[2];
3819 short len;
3820 static char buf[257];
3821
3822 bufadr[0] = sizeof buf - 1;
3823 bufadr[1] = (int) buf;
3824 if (! (SYS$GETMSG (status, &len, bufadr, 0x1, 0) & 1))
3825 return "untranslatable VMS error status";
3826 buf[len] = '\0';
3827 return buf;
3828 }
3829
3830 #ifdef access
3831 #undef access
3832
3833 /* The following is necessary because 'access' emulation by VMS C (2.0) does
3834 * not work correctly. (It also doesn't work well in version 2.3.)
3835 */
3836
3837 #ifdef VMS4_4
3838
3839 #define DESCRIPTOR(name,string) struct dsc$descriptor_s name = \
3840 { strlen (string), DSC$K_DTYPE_T, DSC$K_CLASS_S, string }
3841
3842 typedef union {
3843 struct {
3844 unsigned short s_buflen;
3845 unsigned short s_code;
3846 char *s_bufadr;
3847 unsigned short *s_retlenadr;
3848 } s;
3849 int end;
3850 } item;
3851 #define buflen s.s_buflen
3852 #define code s.s_code
3853 #define bufadr s.s_bufadr
3854 #define retlenadr s.s_retlenadr
3855
3856 #define R_OK 4 /* test for read permission */
3857 #define W_OK 2 /* test for write permission */
3858 #define X_OK 1 /* test for execute (search) permission */
3859 #define F_OK 0 /* test for presence of file */
3860
3861 int
3862 sys_access (path, mode)
3863 char *path;
3864 int mode;
3865 {
3866 static char *user = NULL;
3867 char dir_fn[512];
3868
3869 /* translate possible directory spec into .DIR file name, so brain-dead
3870 * access can treat the directory like a file. */
3871 if (directory_file_name (path, dir_fn))
3872 path = dir_fn;
3873
3874 if (mode == F_OK)
3875 return access (path, mode);
3876 if (user == NULL && (user = (char *) getenv ("USER")) == NULL)
3877 return -1;
3878 {
3879 int stat;
3880 int flags;
3881 int acces;
3882 unsigned short int dummy;
3883 item itemlst[3];
3884 static int constant = ACL$C_FILE;
3885 DESCRIPTOR (path_desc, path);
3886 DESCRIPTOR (user_desc, user);
3887
3888 flags = 0;
3889 acces = 0;
3890 if ((mode & X_OK) && ((stat = access (path, mode)) < 0 || mode == X_OK))
3891 return stat;
3892 if (mode & R_OK)
3893 acces |= CHP$M_READ;
3894 if (mode & W_OK)
3895 acces |= CHP$M_WRITE;
3896 itemlst[0].buflen = sizeof (int);
3897 itemlst[0].code = CHP$_FLAGS;
3898 itemlst[0].bufadr = (char *) &flags;
3899 itemlst[0].retlenadr = &dummy;
3900 itemlst[1].buflen = sizeof (int);
3901 itemlst[1].code = CHP$_ACCESS;
3902 itemlst[1].bufadr = (char *) &acces;
3903 itemlst[1].retlenadr = &dummy;
3904 itemlst[2].end = CHP$_END;
3905 stat = SYS$CHECK_ACCESS (&constant, &path_desc, &user_desc, itemlst);
3906 return stat == SS$_NORMAL ? 0 : -1;
3907 }
3908 }
3909
3910 #else /* not VMS4_4 */
3911
3912 #include <prvdef.h>
3913 #define ACE$M_WRITE 2
3914 #define ACE$C_KEYID 1
3915
3916 static unsigned short memid, grpid;
3917 static unsigned int uic;
3918
3919 /* Called from init_sys_modes, so it happens not very often
3920 but at least each time Emacs is loaded. */
3921 void
3922 sys_access_reinit ()
3923 {
3924 uic = 0;
3925 }
3926
3927 int
3928 sys_access (filename, type)
3929 char * filename;
3930 int type;
3931 {
3932 struct FAB fab;
3933 struct XABPRO xab;
3934 int status, size, i, typecode, acl_controlled;
3935 unsigned int *aclptr, *aclend, aclbuf[60];
3936 union prvdef prvmask;
3937
3938 /* Get UIC and GRP values for protection checking. */
3939 if (uic == 0)
3940 {
3941 status = LIB$GETJPI (&JPI$_UIC, 0, 0, &uic, 0, 0);
3942 if (! (status & 1))
3943 return -1;
3944 memid = uic & 0xFFFF;
3945 grpid = uic >> 16;
3946 }
3947
3948 if (type != 2) /* not checking write access */
3949 return access (filename, type);
3950
3951 /* Check write protection. */
3952
3953 #define CHECKPRIV(bit) (prvmask.bit)
3954 #define WRITABLE(field) (! ((xab.xab$w_pro >> field) & XAB$M_NOWRITE))
3955
3956 /* Find privilege bits */
3957 status = SYS$SETPRV (0, 0, 0, prvmask);
3958 if (! (status & 1))
3959 error ("Unable to find privileges: %s", vmserrstr (status));
3960 if (CHECKPRIV (PRV$V_BYPASS))
3961 return 0; /* BYPASS enabled */
3962 fab = cc$rms_fab;
3963 fab.fab$b_fac = FAB$M_GET;
3964 fab.fab$l_fna = filename;
3965 fab.fab$b_fns = strlen (filename);
3966 fab.fab$l_xab = &xab;
3967 xab = cc$rms_xabpro;
3968 xab.xab$l_aclbuf = aclbuf;
3969 xab.xab$w_aclsiz = sizeof (aclbuf);
3970 status = SYS$OPEN (&fab, 0, 0);
3971 if (! (status & 1))
3972 return -1;
3973 SYS$CLOSE (&fab, 0, 0);
3974 /* Check system access */
3975 if (CHECKPRIV (PRV$V_SYSPRV) && WRITABLE (XAB$V_SYS))
3976 return 0;
3977 /* Check ACL entries, if any */
3978 acl_controlled = 0;
3979 if (xab.xab$w_acllen > 0)
3980 {
3981 aclptr = aclbuf;
3982 aclend = &aclbuf[xab.xab$w_acllen / 4];
3983 while (*aclptr && aclptr < aclend)
3984 {
3985 size = (*aclptr & 0xff) / 4;
3986 typecode = (*aclptr >> 8) & 0xff;
3987 if (typecode == ACE$C_KEYID)
3988 for (i = size - 1; i > 1; i--)
3989 if (aclptr[i] == uic)
3990 {
3991 acl_controlled = 1;
3992 if (aclptr[1] & ACE$M_WRITE)
3993 return 0; /* Write access through ACL */
3994 }
3995 aclptr = &aclptr[size];
3996 }
3997 if (acl_controlled) /* ACL specified, prohibits write access */
3998 return -1;
3999 }
4000 /* No ACL entries specified, check normal protection */
4001 if (WRITABLE (XAB$V_WLD)) /* World writable */
4002 return 0;
4003 if (WRITABLE (XAB$V_GRP) &&
4004 (unsigned short) (xab.xab$l_uic >> 16) == grpid)
4005 return 0; /* Group writable */
4006 if (WRITABLE (XAB$V_OWN) &&
4007 (xab.xab$l_uic & 0xFFFF) == memid)
4008 return 0; /* Owner writable */
4009
4010 return -1; /* Not writable */
4011 }
4012 #endif /* not VMS4_4 */
4013 #endif /* access */
4014
4015 static char vtbuf[NAM$C_MAXRSS+1];
4016
4017 /* translate a vms file spec to a unix path */
4018 char *
4019 sys_translate_vms (vfile)
4020 char * vfile;
4021 {
4022 char * p;
4023 char * targ;
4024
4025 if (!vfile)
4026 return 0;
4027
4028 targ = vtbuf;
4029
4030 /* leading device or logical name is a root directory */
4031 if (p = strchr (vfile, ':'))
4032 {
4033 *targ++ = '/';
4034 while (vfile < p)
4035 *targ++ = *vfile++;
4036 vfile++;
4037 *targ++ = '/';
4038 }
4039 p = vfile;
4040 if (*p == '[' || *p == '<')
4041 {
4042 while (*++vfile != *p + 2)
4043 switch (*vfile)
4044 {
4045 case '.':
4046 if (vfile[-1] == *p)
4047 *targ++ = '.';
4048 *targ++ = '/';
4049 break;
4050
4051 case '-':
4052 *targ++ = '.';
4053 *targ++ = '.';
4054 break;
4055
4056 default:
4057 *targ++ = *vfile;
4058 break;
4059 }
4060 vfile++;
4061 *targ++ = '/';
4062 }
4063 while (*vfile)
4064 *targ++ = *vfile++;
4065
4066 return vtbuf;
4067 }
4068
4069 static char utbuf[NAM$C_MAXRSS+1];
4070
4071 /* translate a unix path to a VMS file spec */
4072 char *
4073 sys_translate_unix (ufile)
4074 char * ufile;
4075 {
4076 int slash_seen = 0;
4077 char *p;
4078 char * targ;
4079
4080 if (!ufile)
4081 return 0;
4082
4083 targ = utbuf;
4084
4085 if (*ufile == '/')
4086 {
4087 ufile++;
4088 }
4089
4090 while (*ufile)
4091 {
4092 switch (*ufile)
4093 {
4094 case '/':
4095 if (slash_seen)
4096 if (index (&ufile[1], '/'))
4097 *targ++ = '.';
4098 else
4099 *targ++ = ']';
4100 else
4101 {
4102 *targ++ = ':';
4103 if (index (&ufile[1], '/'))
4104 *targ++ = '[';
4105 slash_seen = 1;
4106 }
4107 break;
4108
4109 case '.':
4110 if (strncmp (ufile, "./", 2) == 0)
4111 {
4112 if (!slash_seen)
4113 {
4114 *targ++ = '[';
4115 slash_seen = 1;
4116 }
4117 ufile++; /* skip the dot */
4118 if (index (&ufile[1], '/'))
4119 *targ++ = '.';
4120 else
4121 *targ++ = ']';
4122 }
4123 else if (strncmp (ufile, "../", 3) == 0)
4124 {
4125 if (!slash_seen)
4126 {
4127 *targ++ = '[';
4128 slash_seen = 1;
4129 }
4130 *targ++ = '-';
4131 ufile += 2; /* skip the dots */
4132 if (index (&ufile[1], '/'))
4133 *targ++ = '.';
4134 else
4135 *targ++ = ']';
4136 }
4137 else
4138 *targ++ = *ufile;
4139 break;
4140
4141 default:
4142 *targ++ = *ufile;
4143 break;
4144 }
4145 ufile++;
4146 }
4147 *targ = '\0';
4148
4149 return utbuf;
4150 }
4151
4152 char *
4153 getwd (pathname)
4154 char *pathname;
4155 {
4156 char *ptr, *val;
4157 extern char *getcwd ();
4158
4159 #define MAXPATHLEN 1024
4160
4161 ptr = xmalloc (MAXPATHLEN);
4162 val = getcwd (ptr, MAXPATHLEN);
4163 if (val == 0)
4164 {
4165 xfree (ptr);
4166 return val;
4167 }
4168 strcpy (pathname, ptr);
4169 xfree (ptr);
4170
4171 return pathname;
4172 }
4173
4174 int
4175 getppid ()
4176 {
4177 long item_code = JPI$_OWNER;
4178 unsigned long parent_id;
4179 int status;
4180
4181 if (((status = LIB$GETJPI (&item_code, 0, 0, &parent_id)) & 1) == 0)
4182 {
4183 errno = EVMSERR;
4184 vaxc$errno = status;
4185 return -1;
4186 }
4187 return parent_id;
4188 }
4189
4190 #undef getuid
4191 unsigned
4192 sys_getuid ()
4193 {
4194 return (getgid () << 16) | getuid ();
4195 }
4196
4197 #undef read
4198 int
4199 sys_read (fildes, buf, nbyte)
4200 int fildes;
4201 char *buf;
4202 unsigned int nbyte;
4203 {
4204 return read (fildes, buf, (nbyte < MAXIOSIZE ? nbyte : MAXIOSIZE));
4205 }
4206
4207 #if 0
4208 int
4209 sys_write (fildes, buf, nbyte)
4210 int fildes;
4211 char *buf;
4212 unsigned int nbyte;
4213 {
4214 register int nwrote, rtnval = 0;
4215
4216 while (nbyte > MAXIOSIZE && (nwrote = write (fildes, buf, MAXIOSIZE)) > 0) {
4217 nbyte -= nwrote;
4218 buf += nwrote;
4219 rtnval += nwrote;
4220 }
4221 if (nwrote < 0)
4222 return rtnval ? rtnval : -1;
4223 if ((nwrote = write (fildes, buf, nbyte)) < 0)
4224 return rtnval ? rtnval : -1;
4225 return (rtnval + nwrote);
4226 }
4227 #endif /* 0 */
4228
4229 /*
4230 * VAX/VMS VAX C RTL really loses. It insists that records
4231 * end with a newline (carriage return) character, and if they
4232 * don't it adds one (nice of it isn't it!)
4233 *
4234 * Thus we do this stupidity below.
4235 */
4236
4237 #undef write
4238 int
4239 sys_write (fildes, buf, nbytes)
4240 int fildes;
4241 char *buf;
4242 unsigned int nbytes;
4243 {
4244 register char *p;
4245 register char *e;
4246 int sum = 0;
4247 struct stat st;
4248
4249 fstat (fildes, &st);
4250 p = buf;
4251 while (nbytes > 0)
4252 {
4253 int len, retval;
4254
4255 /* Handle fixed-length files with carriage control. */
4256 if (st.st_fab_rfm == FAB$C_FIX
4257 && ((st.st_fab_rat & (FAB$M_FTN | FAB$M_CR)) != 0))
4258 {
4259 len = st.st_fab_mrs;
4260 retval = write (fildes, p, min (len, nbytes));
4261 if (retval != len)
4262 return -1;
4263 retval++; /* This skips the implied carriage control */
4264 }
4265 else
4266 {
4267 e = p + min (MAXIOSIZE, nbytes) - 1;
4268 while (*e != '\n' && e > p) e--;
4269 if (p == e) /* Ok.. so here we add a newline... sigh. */
4270 e = p + min (MAXIOSIZE, nbytes) - 1;
4271 len = e + 1 - p;
4272 retval = write (fildes, p, len);
4273 if (retval != len)
4274 return -1;
4275 }
4276 p += retval;
4277 sum += retval;
4278 nbytes -= retval;
4279 }
4280 return sum;
4281 }
4282
4283 /* Create file NEW copying its attributes from file OLD. If
4284 OLD is 0 or does not exist, create based on the value of
4285 vms_stmlf_recfm. */
4286
4287 /* Protection value the file should ultimately have.
4288 Set by create_copy_attrs, and use by rename_sansversions. */
4289 static unsigned short int fab_final_pro;
4290
4291 int
4292 creat_copy_attrs (old, new)
4293 char *old, *new;
4294 {
4295 struct FAB fab = cc$rms_fab;
4296 struct XABPRO xabpro;
4297 char aclbuf[256]; /* Choice of size is arbitrary. See below. */
4298 extern int vms_stmlf_recfm;
4299
4300 if (old)
4301 {
4302 fab.fab$b_fac = FAB$M_GET;
4303 fab.fab$l_fna = old;
4304 fab.fab$b_fns = strlen (old);
4305 fab.fab$l_xab = (char *) &xabpro;
4306 xabpro = cc$rms_xabpro;
4307 xabpro.xab$l_aclbuf = aclbuf;
4308 xabpro.xab$w_aclsiz = sizeof aclbuf;
4309 /* Call $OPEN to fill in the fab & xabpro fields. */
4310 if (SYS$OPEN (&fab, 0, 0) & 1)
4311 {
4312 SYS$CLOSE (&fab, 0, 0);
4313 fab.fab$l_alq = 0; /* zero the allocation quantity */
4314 if (xabpro.xab$w_acllen > 0)
4315 {
4316 if (xabpro.xab$w_acllen > sizeof aclbuf)
4317 /* If the acl buffer was too short, redo open with longer one.
4318 Wouldn't need to do this if there were some system imposed
4319 limit on the size of an ACL, but I can't find any such. */
4320 {
4321 xabpro.xab$l_aclbuf = (char *) alloca (xabpro.xab$w_acllen);
4322 xabpro.xab$w_aclsiz = xabpro.xab$w_acllen;
4323 if (SYS$OPEN (&fab, 0, 0) & 1)
4324 SYS$CLOSE (&fab, 0, 0);
4325 else
4326 old = 0;
4327 }
4328 }
4329 else
4330 xabpro.xab$l_aclbuf = 0;
4331 }
4332 else
4333 old = 0;
4334 }
4335 fab.fab$l_fna = new;
4336 fab.fab$b_fns = strlen (new);
4337 if (!old)
4338 {
4339 fab.fab$l_xab = 0;
4340 fab.fab$b_rfm = vms_stmlf_recfm ? FAB$C_STMLF : FAB$C_VAR;
4341 fab.fab$b_rat = FAB$M_CR;
4342 }
4343
4344 /* Set the file protections such that we will be able to manipulate
4345 this file. Once we are done writing and renaming it, we will set
4346 the protections back. */
4347 if (old)
4348 fab_final_pro = xabpro.xab$w_pro;
4349 else
4350 SYS$SETDFPROT (0, &fab_final_pro);
4351 xabpro.xab$w_pro &= 0xff0f; /* set O:rewd for now. This is set back later. */
4352
4353 /* Create the new file with either default attrs or attrs copied
4354 from old file. */
4355 if (!(SYS$CREATE (&fab, 0, 0) & 1))
4356 return -1;
4357 SYS$CLOSE (&fab, 0, 0);
4358 /* As this is a "replacement" for creat, return a file descriptor
4359 opened for writing. */
4360 return open (new, O_WRONLY);
4361 }
4362
4363 #ifdef creat
4364 #undef creat
4365 #include <varargs.h>
4366 #ifdef __GNUC__
4367 #ifndef va_count
4368 #define va_count(X) ((X) = *(((int *) &(va_alist)) - 1))
4369 #endif
4370 #endif
4371
4372 int
4373 sys_creat (va_alist)
4374 va_dcl
4375 {
4376 va_list list_incrementer;
4377 char *name;
4378 int mode;
4379 int rfd; /* related file descriptor */
4380 int fd; /* Our new file descriptor */
4381 int count;
4382 struct stat st_buf;
4383 char rfm[12];
4384 char rat[15];
4385 char mrs[13];
4386 char fsz[13];
4387 extern int vms_stmlf_recfm;
4388
4389 va_count (count);
4390 va_start (list_incrementer);
4391 name = va_arg (list_incrementer, char *);
4392 mode = va_arg (list_incrementer, int);
4393 if (count > 2)
4394 rfd = va_arg (list_incrementer, int);
4395 va_end (list_incrementer);
4396 if (count > 2)
4397 {
4398 /* Use information from the related file descriptor to set record
4399 format of the newly created file. */
4400 fstat (rfd, &st_buf);
4401 switch (st_buf.st_fab_rfm)
4402 {
4403 case FAB$C_FIX:
4404 strcpy (rfm, "rfm = fix");
4405 sprintf (mrs, "mrs = %d", st_buf.st_fab_mrs);
4406 strcpy (rat, "rat = ");
4407 if (st_buf.st_fab_rat & FAB$M_CR)
4408 strcat (rat, "cr");
4409 else if (st_buf.st_fab_rat & FAB$M_FTN)
4410 strcat (rat, "ftn");
4411 else if (st_buf.st_fab_rat & FAB$M_PRN)
4412 strcat (rat, "prn");
4413 if (st_buf.st_fab_rat & FAB$M_BLK)
4414 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4415 strcat (rat, ", blk");
4416 else
4417 strcat (rat, "blk");
4418 return creat (name, 0, rfm, rat, mrs);
4419
4420 case FAB$C_VFC:
4421 strcpy (rfm, "rfm = vfc");
4422 sprintf (fsz, "fsz = %d", st_buf.st_fab_fsz);
4423 strcpy (rat, "rat = ");
4424 if (st_buf.st_fab_rat & FAB$M_CR)
4425 strcat (rat, "cr");
4426 else if (st_buf.st_fab_rat & FAB$M_FTN)
4427 strcat (rat, "ftn");
4428 else if (st_buf.st_fab_rat & FAB$M_PRN)
4429 strcat (rat, "prn");
4430 if (st_buf.st_fab_rat & FAB$M_BLK)
4431 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4432 strcat (rat, ", blk");
4433 else
4434 strcat (rat, "blk");
4435 return creat (name, 0, rfm, rat, fsz);
4436
4437 case FAB$C_STM:
4438 strcpy (rfm, "rfm = stm");
4439 break;
4440
4441 case FAB$C_STMCR:
4442 strcpy (rfm, "rfm = stmcr");
4443 break;
4444
4445 case FAB$C_STMLF:
4446 strcpy (rfm, "rfm = stmlf");
4447 break;
4448
4449 case FAB$C_UDF:
4450 strcpy (rfm, "rfm = udf");
4451 break;
4452
4453 case FAB$C_VAR:
4454 strcpy (rfm, "rfm = var");
4455 break;
4456 }
4457 strcpy (rat, "rat = ");
4458 if (st_buf.st_fab_rat & FAB$M_CR)
4459 strcat (rat, "cr");
4460 else if (st_buf.st_fab_rat & FAB$M_FTN)
4461 strcat (rat, "ftn");
4462 else if (st_buf.st_fab_rat & FAB$M_PRN)
4463 strcat (rat, "prn");
4464 if (st_buf.st_fab_rat & FAB$M_BLK)
4465 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4466 strcat (rat, ", blk");
4467 else
4468 strcat (rat, "blk");
4469 }
4470 else
4471 {
4472 strcpy (rfm, vms_stmlf_recfm ? "rfm = stmlf" : "rfm=var");
4473 strcpy (rat, "rat=cr");
4474 }
4475 /* Until the VAX C RTL fixes the many bugs with modes, always use
4476 mode 0 to get the user's default protection. */
4477 fd = creat (name, 0, rfm, rat);
4478 if (fd < 0 && errno == EEXIST)
4479 {
4480 if (unlink (name) < 0)
4481 report_file_error ("delete", build_string (name));
4482 fd = creat (name, 0, rfm, rat);
4483 }
4484 return fd;
4485 }
4486 #endif /* creat */
4487
4488 /* fwrite to stdout is S L O W. Speed it up by using fputc...*/
4489 int
4490 sys_fwrite (ptr, size, num, fp)
4491 register char * ptr;
4492 FILE * fp;
4493 {
4494 register int tot = num * size;
4495
4496 while (tot--)
4497 fputc (*ptr++, fp);
4498 return num;
4499 }
4500
4501 /*
4502 * The VMS C library routine creat actually creates a new version of an
4503 * existing file rather than truncating the old version. There are times
4504 * when this is not the desired behavior, for instance, when writing an
4505 * auto save file (you only want one version), or when you don't have
4506 * write permission in the directory containing the file (but the file
4507 * itself is writable). Hence this routine, which is equivalent to
4508 * "close (creat (fn, 0));" on Unix if fn already exists.
4509 */
4510 int
4511 vms_truncate (fn)
4512 char *fn;
4513 {
4514 struct FAB xfab = cc$rms_fab;
4515 struct RAB xrab = cc$rms_rab;
4516 int status;
4517
4518 xfab.fab$l_fop = FAB$M_TEF; /* free allocated but unused blocks on close */
4519 xfab.fab$b_fac = FAB$M_TRN | FAB$M_GET; /* allow truncate and get access */
4520 xfab.fab$b_shr = FAB$M_NIL; /* allow no sharing - file must be locked */
4521 xfab.fab$l_fna = fn;
4522 xfab.fab$b_fns = strlen (fn);
4523 xfab.fab$l_dna = ";0"; /* default to latest version of the file */
4524 xfab.fab$b_dns = 2;
4525 xrab.rab$l_fab = &xfab;
4526
4527 /* This gibberish opens the file, positions to the first record, and
4528 deletes all records from there until the end of file. */
4529 if ((SYS$OPEN (&xfab) & 01) == 01)
4530 {
4531 if ((SYS$CONNECT (&xrab) & 01) == 01 &&
4532 (SYS$FIND (&xrab) & 01) == 01 &&
4533 (SYS$TRUNCATE (&xrab) & 01) == 01)
4534 status = 0;
4535 else
4536 status = -1;
4537 }
4538 else
4539 status = -1;
4540 SYS$CLOSE (&xfab);
4541 return status;
4542 }
4543
4544 /* Define this symbol to actually read SYSUAF.DAT. This requires either
4545 SYSPRV or a readable SYSUAF.DAT. */
4546
4547 #ifdef READ_SYSUAF
4548 /*
4549 * getuaf.c
4550 *
4551 * Routine to read the VMS User Authorization File and return
4552 * a specific user's record.
4553 */
4554
4555 static struct UAF retuaf;
4556
4557 struct UAF *
4558 get_uaf_name (uname)
4559 char * uname;
4560 {
4561 register status;
4562 struct FAB uaf_fab;
4563 struct RAB uaf_rab;
4564
4565 uaf_fab = cc$rms_fab;
4566 uaf_rab = cc$rms_rab;
4567 /* initialize fab fields */
4568 uaf_fab.fab$l_fna = "SYS$SYSTEM:SYSUAF.DAT";
4569 uaf_fab.fab$b_fns = 21;
4570 uaf_fab.fab$b_fac = FAB$M_GET;
4571 uaf_fab.fab$b_org = FAB$C_IDX;
4572 uaf_fab.fab$b_shr = FAB$M_GET|FAB$M_PUT|FAB$M_UPD|FAB$M_DEL;
4573 /* initialize rab fields */
4574 uaf_rab.rab$l_fab = &uaf_fab;
4575 /* open the User Authorization File */
4576 status = SYS$OPEN (&uaf_fab);
4577 if (!(status&1))
4578 {
4579 errno = EVMSERR;
4580 vaxc$errno = status;
4581 return 0;
4582 }
4583 status = SYS$CONNECT (&uaf_rab);
4584 if (!(status&1))
4585 {
4586 errno = EVMSERR;
4587 vaxc$errno = status;
4588 return 0;
4589 }
4590 /* read the requested record - index is in uname */
4591 uaf_rab.rab$l_kbf = uname;
4592 uaf_rab.rab$b_ksz = strlen (uname);
4593 uaf_rab.rab$b_rac = RAB$C_KEY;
4594 uaf_rab.rab$l_ubf = (char *)&retuaf;
4595 uaf_rab.rab$w_usz = sizeof retuaf;
4596 status = SYS$GET (&uaf_rab);
4597 if (!(status&1))
4598 {
4599 errno = EVMSERR;
4600 vaxc$errno = status;
4601 return 0;
4602 }
4603 /* close the User Authorization File */
4604 status = SYS$DISCONNECT (&uaf_rab);
4605 if (!(status&1))
4606 {
4607 errno = EVMSERR;
4608 vaxc$errno = status;
4609 return 0;
4610 }
4611 status = SYS$CLOSE (&uaf_fab);
4612 if (!(status&1))
4613 {
4614 errno = EVMSERR;
4615 vaxc$errno = status;
4616 return 0;
4617 }
4618 return &retuaf;
4619 }
4620
4621 struct UAF *
4622 get_uaf_uic (uic)
4623 unsigned long uic;
4624 {
4625 register status;
4626 struct FAB uaf_fab;
4627 struct RAB uaf_rab;
4628
4629 uaf_fab = cc$rms_fab;
4630 uaf_rab = cc$rms_rab;
4631 /* initialize fab fields */
4632 uaf_fab.fab$l_fna = "SYS$SYSTEM:SYSUAF.DAT";
4633 uaf_fab.fab$b_fns = 21;
4634 uaf_fab.fab$b_fac = FAB$M_GET;
4635 uaf_fab.fab$b_org = FAB$C_IDX;
4636 uaf_fab.fab$b_shr = FAB$M_GET|FAB$M_PUT|FAB$M_UPD|FAB$M_DEL;
4637 /* initialize rab fields */
4638 uaf_rab.rab$l_fab = &uaf_fab;
4639 /* open the User Authorization File */
4640 status = SYS$OPEN (&uaf_fab);
4641 if (!(status&1))
4642 {
4643 errno = EVMSERR;
4644 vaxc$errno = status;
4645 return 0;
4646 }
4647 status = SYS$CONNECT (&uaf_rab);
4648 if (!(status&1))
4649 {
4650 errno = EVMSERR;
4651 vaxc$errno = status;
4652 return 0;
4653 }
4654 /* read the requested record - index is in uic */
4655 uaf_rab.rab$b_krf = 1; /* 1st alternate key */
4656 uaf_rab.rab$l_kbf = (char *) &uic;
4657 uaf_rab.rab$b_ksz = sizeof uic;
4658 uaf_rab.rab$b_rac = RAB$C_KEY;
4659 uaf_rab.rab$l_ubf = (char *)&retuaf;
4660 uaf_rab.rab$w_usz = sizeof retuaf;
4661 status = SYS$GET (&uaf_rab);
4662 if (!(status&1))
4663 {
4664 errno = EVMSERR;
4665 vaxc$errno = status;
4666 return 0;
4667 }
4668 /* close the User Authorization File */
4669 status = SYS$DISCONNECT (&uaf_rab);
4670 if (!(status&1))
4671 {
4672 errno = EVMSERR;
4673 vaxc$errno = status;
4674 return 0;
4675 }
4676 status = SYS$CLOSE (&uaf_fab);
4677 if (!(status&1))
4678 {
4679 errno = EVMSERR;
4680 vaxc$errno = status;
4681 return 0;
4682 }
4683 return &retuaf;
4684 }
4685
4686 static struct passwd retpw;
4687
4688 struct passwd *
4689 cnv_uaf_pw (up)
4690 struct UAF * up;
4691 {
4692 char * ptr;
4693
4694 /* copy these out first because if the username is 32 chars, the next
4695 section will overwrite the first byte of the UIC */
4696 retpw.pw_uid = up->uaf$w_mem;
4697 retpw.pw_gid = up->uaf$w_grp;
4698
4699 /* I suppose this is not the best style, to possibly overwrite one
4700 byte beyond the end of the field, but what the heck... */
4701 ptr = &up->uaf$t_username[UAF$S_USERNAME];
4702 while (ptr[-1] == ' ')
4703 ptr--;
4704 *ptr = '\0';
4705 strcpy (retpw.pw_name, up->uaf$t_username);
4706
4707 /* the rest of these are counted ascii strings */
4708 strncpy (retpw.pw_gecos, &up->uaf$t_owner[1], up->uaf$t_owner[0]);
4709 retpw.pw_gecos[up->uaf$t_owner[0]] = '\0';
4710 strncpy (retpw.pw_dir, &up->uaf$t_defdev[1], up->uaf$t_defdev[0]);
4711 retpw.pw_dir[up->uaf$t_defdev[0]] = '\0';
4712 strncat (retpw.pw_dir, &up->uaf$t_defdir[1], up->uaf$t_defdir[0]);
4713 retpw.pw_dir[up->uaf$t_defdev[0] + up->uaf$t_defdir[0]] = '\0';
4714 strncpy (retpw.pw_shell, &up->uaf$t_defcli[1], up->uaf$t_defcli[0]);
4715 retpw.pw_shell[up->uaf$t_defcli[0]] = '\0';
4716
4717 return &retpw;
4718 }
4719 #else /* not READ_SYSUAF */
4720 static struct passwd retpw;
4721 #endif /* not READ_SYSUAF */
4722
4723 struct passwd *
4724 getpwnam (name)
4725 char * name;
4726 {
4727 #ifdef READ_SYSUAF
4728 struct UAF *up;
4729 #else
4730 char * user;
4731 char * dir;
4732 unsigned char * full;
4733 #endif /* READ_SYSUAF */
4734 char *ptr = name;
4735
4736 while (*ptr)
4737 {
4738 if ('a' <= *ptr && *ptr <= 'z')
4739 *ptr -= 040;
4740 ptr++;
4741 }
4742 #ifdef READ_SYSUAF
4743 if (!(up = get_uaf_name (name)))
4744 return 0;
4745 return cnv_uaf_pw (up);
4746 #else
4747 if (strcmp (name, getenv ("USER")) == 0)
4748 {
4749 retpw.pw_uid = getuid ();
4750 retpw.pw_gid = getgid ();
4751 strcpy (retpw.pw_name, name);
4752 if (full = egetenv ("FULLNAME"))
4753 strcpy (retpw.pw_gecos, full);
4754 else
4755 *retpw.pw_gecos = '\0';
4756 strcpy (retpw.pw_dir, egetenv ("HOME"));
4757 *retpw.pw_shell = '\0';
4758 return &retpw;
4759 }
4760 else
4761 return 0;
4762 #endif /* not READ_SYSUAF */
4763 }
4764
4765 struct passwd *
4766 getpwuid (uid)
4767 unsigned long uid;
4768 {
4769 #ifdef READ_SYSUAF
4770 struct UAF * up;
4771
4772 if (!(up = get_uaf_uic (uid)))
4773 return 0;
4774 return cnv_uaf_pw (up);
4775 #else
4776 if (uid == sys_getuid ())
4777 return getpwnam (egetenv ("USER"));
4778 else
4779 return 0;
4780 #endif /* not READ_SYSUAF */
4781 }
4782
4783 /* return total address space available to the current process. This is
4784 the sum of the current p0 size, p1 size and free page table entries
4785 available. */
4786 int
4787 vlimit ()
4788 {
4789 int item_code;
4790 unsigned long free_pages;
4791 unsigned long frep0va;
4792 unsigned long frep1va;
4793 register status;
4794
4795 item_code = JPI$_FREPTECNT;
4796 if (((status = LIB$GETJPI (&item_code, 0, 0, &free_pages)) & 1) == 0)
4797 {
4798 errno = EVMSERR;
4799 vaxc$errno = status;
4800 return -1;
4801 }
4802 free_pages *= 512;
4803
4804 item_code = JPI$_FREP0VA;
4805 if (((status = LIB$GETJPI (&item_code, 0, 0, &frep0va)) & 1) == 0)
4806 {
4807 errno = EVMSERR;
4808 vaxc$errno = status;
4809 return -1;
4810 }
4811 item_code = JPI$_FREP1VA;
4812 if (((status = LIB$GETJPI (&item_code, 0, 0, &frep1va)) & 1) == 0)
4813 {
4814 errno = EVMSERR;
4815 vaxc$errno = status;
4816 return -1;
4817 }
4818
4819 return free_pages + frep0va + (0x7fffffff - frep1va);
4820 }
4821
4822 int
4823 define_logical_name (varname, string)
4824 char *varname;
4825 char *string;
4826 {
4827 struct dsc$descriptor_s strdsc =
4828 {strlen (string), DSC$K_DTYPE_T, DSC$K_CLASS_S, string};
4829 struct dsc$descriptor_s envdsc =
4830 {strlen (varname), DSC$K_DTYPE_T, DSC$K_CLASS_S, varname};
4831 struct dsc$descriptor_s lnmdsc =
4832 {7, DSC$K_DTYPE_T, DSC$K_CLASS_S, "LNM$JOB"};
4833
4834 return LIB$SET_LOGICAL (&envdsc, &strdsc, &lnmdsc, 0, 0);
4835 }
4836
4837 int
4838 delete_logical_name (varname)
4839 char *varname;
4840 {
4841 struct dsc$descriptor_s envdsc =
4842 {strlen (varname), DSC$K_DTYPE_T, DSC$K_CLASS_S, varname};
4843 struct dsc$descriptor_s lnmdsc =
4844 {7, DSC$K_DTYPE_T, DSC$K_CLASS_S, "LNM$JOB"};
4845
4846 return LIB$DELETE_LOGICAL (&envdsc, &lnmdsc);
4847 }
4848
4849 int
4850 ulimit ()
4851 {
4852 return 0;
4853 }
4854
4855 int
4856 setpgrp ()
4857 {
4858 return 0;
4859 }
4860
4861 int
4862 execvp ()
4863 {
4864 error ("execvp system call not implemented");
4865 return -1;
4866 }
4867
4868 int
4869 rename (from, to)
4870 char *from, *to;
4871 {
4872 int status;
4873 struct FAB from_fab = cc$rms_fab, to_fab = cc$rms_fab;
4874 struct NAM from_nam = cc$rms_nam, to_nam = cc$rms_nam;
4875 char from_esn[NAM$C_MAXRSS];
4876 char to_esn[NAM$C_MAXRSS];
4877
4878 from_fab.fab$l_fna = from;
4879 from_fab.fab$b_fns = strlen (from);
4880 from_fab.fab$l_nam = &from_nam;
4881 from_fab.fab$l_fop = FAB$M_NAM;
4882
4883 from_nam.nam$l_esa = from_esn;
4884 from_nam.nam$b_ess = sizeof from_esn;
4885
4886 to_fab.fab$l_fna = to;
4887 to_fab.fab$b_fns = strlen (to);
4888 to_fab.fab$l_nam = &to_nam;
4889 to_fab.fab$l_fop = FAB$M_NAM;
4890
4891 to_nam.nam$l_esa = to_esn;
4892 to_nam.nam$b_ess = sizeof to_esn;
4893
4894 status = SYS$RENAME (&from_fab, 0, 0, &to_fab);
4895
4896 if (status & 1)
4897 return 0;
4898 else
4899 {
4900 if (status == RMS$_DEV)
4901 errno = EXDEV;
4902 else
4903 errno = EVMSERR;
4904 vaxc$errno = status;
4905 return -1;
4906 }
4907 }
4908
4909 /* This function renames a file like `rename', but it strips
4910 the version number from the "to" filename, such that the "to" file is
4911 will always be a new version. It also sets the file protection once it is
4912 finished. The protection that we will use is stored in fab_final_pro,
4913 and was set when we did a creat_copy_attrs to create the file that we
4914 are renaming.
4915
4916 We could use the chmod function, but Eunichs uses 3 bits per user category
4917 to describe the protection, and VMS uses 4 (write and delete are separate
4918 bits). To maintain portability, the VMS implementation of `chmod' wires
4919 the W and D bits together. */
4920
4921
4922 static struct fibdef fib; /* We need this initialized to zero */
4923 char vms_file_written[NAM$C_MAXRSS];
4924
4925 int
4926 rename_sans_version (from,to)
4927 char *from, *to;
4928 {
4929 short int chan;
4930 int stat;
4931 short int iosb[4];
4932 int status;
4933 struct FAB to_fab = cc$rms_fab;
4934 struct NAM to_nam = cc$rms_nam;
4935 struct dsc$descriptor fib_d ={sizeof (fib),0,0,(char*) &fib};
4936 struct dsc$descriptor fib_attr[2]
4937 = {{sizeof (fab_final_pro),ATR$C_FPRO,0,(char*) &fab_final_pro},{0,0,0,0}};
4938 char to_esn[NAM$C_MAXRSS];
4939
4940 $DESCRIPTOR (disk,to_esn);
4941
4942 to_fab.fab$l_fna = to;
4943 to_fab.fab$b_fns = strlen (to);
4944 to_fab.fab$l_nam = &to_nam;
4945 to_fab.fab$l_fop = FAB$M_NAM;
4946
4947 to_nam.nam$l_esa = to_esn;
4948 to_nam.nam$b_ess = sizeof to_esn;
4949
4950 status = SYS$PARSE (&to_fab, 0, 0); /* figure out the full file name */
4951
4952 if (to_nam.nam$l_fnb && NAM$M_EXP_VER)
4953 *(to_nam.nam$l_ver) = '\0';
4954
4955 stat = rename (from, to_esn);
4956 if (stat < 0)
4957 return stat;
4958
4959 strcpy (vms_file_written, to_esn);
4960
4961 to_fab.fab$l_fna = vms_file_written; /* this points to the versionless name */
4962 to_fab.fab$b_fns = strlen (vms_file_written);
4963
4964 /* Now set the file protection to the correct value */
4965 SYS$OPEN (&to_fab, 0, 0); /* This fills in the nam$w_fid fields */
4966
4967 /* Copy these fields into the fib */
4968 fib.fib$r_fid_overlay.fib$w_fid[0] = to_nam.nam$w_fid[0];
4969 fib.fib$r_fid_overlay.fib$w_fid[1] = to_nam.nam$w_fid[1];
4970 fib.fib$r_fid_overlay.fib$w_fid[2] = to_nam.nam$w_fid[2];
4971
4972 SYS$CLOSE (&to_fab, 0, 0);
4973
4974 stat = SYS$ASSIGN (&disk, &chan, 0, 0); /* open a channel to the disk */
4975 if (!stat)
4976 LIB$SIGNAL (stat);
4977 stat = SYS$QIOW (0, chan, IO$_MODIFY, iosb, 0, 0, &fib_d,
4978 0, 0, 0, &fib_attr, 0);
4979 if (!stat)
4980 LIB$SIGNAL (stat);
4981 stat = SYS$DASSGN (chan);
4982 if (!stat)
4983 LIB$SIGNAL (stat);
4984 strcpy (vms_file_written, to_esn); /* We will write this to the terminal*/
4985 return 0;
4986 }
4987
4988 int
4989 link (file, new)
4990 char * file, * new;
4991 {
4992 register status;
4993 struct FAB fab;
4994 struct NAM nam;
4995 unsigned short fid[3];
4996 char esa[NAM$C_MAXRSS];
4997
4998 fab = cc$rms_fab;
4999 fab.fab$l_fop = FAB$M_OFP;
5000 fab.fab$l_fna = file;
5001 fab.fab$b_fns = strlen (file);
5002 fab.fab$l_nam = &nam;
5003
5004 nam = cc$rms_nam;
5005 nam.nam$l_esa = esa;
5006 nam.nam$b_ess = NAM$C_MAXRSS;
5007
5008 status = SYS$PARSE (&fab);
5009 if ((status & 1) == 0)
5010 {
5011 errno = EVMSERR;
5012 vaxc$errno = status;
5013 return -1;
5014 }
5015 status = SYS$SEARCH (&fab);
5016 if ((status & 1) == 0)
5017 {
5018 errno = EVMSERR;
5019 vaxc$errno = status;
5020 return -1;
5021 }
5022
5023 fid[0] = nam.nam$w_fid[0];
5024 fid[1] = nam.nam$w_fid[1];
5025 fid[2] = nam.nam$w_fid[2];
5026
5027 fab.fab$l_fna = new;
5028 fab.fab$b_fns = strlen (new);
5029
5030 status = SYS$PARSE (&fab);
5031 if ((status & 1) == 0)
5032 {
5033 errno = EVMSERR;
5034 vaxc$errno = status;
5035 return -1;
5036 }
5037
5038 nam.nam$w_fid[0] = fid[0];
5039 nam.nam$w_fid[1] = fid[1];
5040 nam.nam$w_fid[2] = fid[2];
5041
5042 nam.nam$l_esa = nam.nam$l_name;
5043 nam.nam$b_esl = nam.nam$b_name + nam.nam$b_type + nam.nam$b_ver;
5044
5045 status = SYS$ENTER (&fab);
5046 if ((status & 1) == 0)
5047 {
5048 errno = EVMSERR;
5049 vaxc$errno = status;
5050 return -1;
5051 }
5052
5053 return 0;
5054 }
5055
5056 void
5057 croak (badfunc)
5058 char *badfunc;
5059 {
5060 printf ("%s not yet implemented\r\n", badfunc);
5061 reset_sys_modes ();
5062 exit (1);
5063 }
5064
5065 long
5066 random ()
5067 {
5068 /* Arrange to return a range centered on zero. */
5069 return rand () - (1 << 30);
5070 }
5071
5072 void
5073 srandom (seed)
5074 {
5075 srand (seed);
5076 }
5077 #endif /* VMS */
5078 \f
5079 #ifdef AIXHFT
5080
5081 /* Called from init_sys_modes. */
5082 void
5083 hft_init ()
5084 {
5085 int junk;
5086
5087 /* If we're not on an HFT we shouldn't do any of this. We determine
5088 if we are on an HFT by trying to get an HFT error code. If this
5089 call fails, we're not on an HFT. */
5090 #ifdef IBMR2AIX
5091 if (ioctl (0, HFQERROR, &junk) < 0)
5092 return;
5093 #else /* not IBMR2AIX */
5094 if (ioctl (0, HFQEIO, 0) < 0)
5095 return;
5096 #endif /* not IBMR2AIX */
5097
5098 /* On AIX the default hft keyboard mapping uses backspace rather than delete
5099 as the rubout key's ASCII code. Here this is changed. The bug is that
5100 there's no way to determine the old mapping, so in reset_sys_modes
5101 we need to assume that the normal map had been present. Of course, this
5102 code also doesn't help if on a terminal emulator which doesn't understand
5103 HFT VTD's. */
5104 {
5105 struct hfbuf buf;
5106 struct hfkeymap keymap;
5107
5108 buf.hf_bufp = (char *)&keymap;
5109 buf.hf_buflen = sizeof (keymap);
5110 keymap.hf_nkeys = 2;
5111 keymap.hfkey[0].hf_kpos = 15;
5112 keymap.hfkey[0].hf_kstate = HFMAPCHAR | HFSHFNONE;
5113 #ifdef IBMR2AIX
5114 keymap.hfkey[0].hf_keyidh = '<';
5115 #else /* not IBMR2AIX */
5116 keymap.hfkey[0].hf_page = '<';
5117 #endif /* not IBMR2AIX */
5118 keymap.hfkey[0].hf_char = 127;
5119 keymap.hfkey[1].hf_kpos = 15;
5120 keymap.hfkey[1].hf_kstate = HFMAPCHAR | HFSHFSHFT;
5121 #ifdef IBMR2AIX
5122 keymap.hfkey[1].hf_keyidh = '<';
5123 #else /* not IBMR2AIX */
5124 keymap.hfkey[1].hf_page = '<';
5125 #endif /* not IBMR2AIX */
5126 keymap.hfkey[1].hf_char = 127;
5127 hftctl (0, HFSKBD, &buf);
5128 }
5129 /* The HFT system on AIX doesn't optimize for scrolling, so it's really ugly
5130 at times. */
5131 line_ins_del_ok = char_ins_del_ok = 0;
5132 }
5133
5134 /* Reset the rubout key to backspace. */
5135
5136 void
5137 hft_reset ()
5138 {
5139 struct hfbuf buf;
5140 struct hfkeymap keymap;
5141 int junk;
5142
5143 #ifdef IBMR2AIX
5144 if (ioctl (0, HFQERROR, &junk) < 0)
5145 return;
5146 #else /* not IBMR2AIX */
5147 if (ioctl (0, HFQEIO, 0) < 0)
5148 return;
5149 #endif /* not IBMR2AIX */
5150
5151 buf.hf_bufp = (char *)&keymap;
5152 buf.hf_buflen = sizeof (keymap);
5153 keymap.hf_nkeys = 2;
5154 keymap.hfkey[0].hf_kpos = 15;
5155 keymap.hfkey[0].hf_kstate = HFMAPCHAR | HFSHFNONE;
5156 #ifdef IBMR2AIX
5157 keymap.hfkey[0].hf_keyidh = '<';
5158 #else /* not IBMR2AIX */
5159 keymap.hfkey[0].hf_page = '<';
5160 #endif /* not IBMR2AIX */
5161 keymap.hfkey[0].hf_char = 8;
5162 keymap.hfkey[1].hf_kpos = 15;
5163 keymap.hfkey[1].hf_kstate = HFMAPCHAR | HFSHFSHFT;
5164 #ifdef IBMR2AIX
5165 keymap.hfkey[1].hf_keyidh = '<';
5166 #else /* not IBMR2AIX */
5167 keymap.hfkey[1].hf_page = '<';
5168 #endif /* not IBMR2AIX */
5169 keymap.hfkey[1].hf_char = 8;
5170 hftctl (0, HFSKBD, &buf);
5171 }
5172
5173 #endif /* AIXHFT */
5174
5175 #ifdef USE_DL_STUBS
5176
5177 /* These are included on Sunos 4.1 when we do not use shared libraries.
5178 X11 libraries may refer to these functions but (we hope) do not
5179 actually call them. */
5180
5181 void *
5182 dlopen ()
5183 {
5184 return 0;
5185 }
5186
5187 void *
5188 dlsym ()
5189 {
5190 return 0;
5191 }
5192
5193 int
5194 dlclose ()
5195 {
5196 return -1;
5197 }
5198
5199 #endif /* USE_DL_STUBS */
5200 \f
5201 #ifndef BSTRING
5202
5203 #ifndef bzero
5204
5205 void
5206 bzero (b, length)
5207 register char *b;
5208 register int length;
5209 {
5210 #ifdef VMS
5211 short zero = 0;
5212 long max_str = 65535;
5213
5214 while (length > max_str) {
5215 (void) LIB$MOVC5 (&zero, &zero, &zero, &max_str, b);
5216 length -= max_str;
5217 b += max_str;
5218 }
5219 max_str = length;
5220 (void) LIB$MOVC5 (&zero, &zero, &zero, &max_str, b);
5221 #else
5222 while (length-- > 0)
5223 *b++ = 0;
5224 #endif /* not VMS */
5225 }
5226
5227 #endif /* no bzero */
5228 #endif /* BSTRING */
5229
5230 #if (!defined (BSTRING) && !defined (bcopy)) || defined (NEED_BCOPY)
5231 #undef bcopy
5232
5233 /* Saying `void' requires a declaration, above, where bcopy is used
5234 and that declaration causes pain for systems where bcopy is a macro. */
5235 bcopy (b1, b2, length)
5236 register char *b1;
5237 register char *b2;
5238 register int length;
5239 {
5240 #ifdef VMS
5241 long max_str = 65535;
5242
5243 while (length > max_str) {
5244 (void) LIB$MOVC3 (&max_str, b1, b2);
5245 length -= max_str;
5246 b1 += max_str;
5247 b2 += max_str;
5248 }
5249 max_str = length;
5250 (void) LIB$MOVC3 (&length, b1, b2);
5251 #else
5252 while (length-- > 0)
5253 *b2++ = *b1++;
5254 #endif /* not VMS */
5255 }
5256 #endif /* (!defined (BSTRING) && !defined (bcopy)) || defined (NEED_BCOPY) */
5257
5258 #ifndef BSTRING
5259 #ifndef bcmp
5260 int
5261 bcmp (b1, b2, length) /* This could be a macro! */
5262 register char *b1;
5263 register char *b2;
5264 register int length;
5265 {
5266 #ifdef VMS
5267 struct dsc$descriptor_s src1 = {length, DSC$K_DTYPE_T, DSC$K_CLASS_S, b1};
5268 struct dsc$descriptor_s src2 = {length, DSC$K_DTYPE_T, DSC$K_CLASS_S, b2};
5269
5270 return STR$COMPARE (&src1, &src2);
5271 #else
5272 while (length-- > 0)
5273 if (*b1++ != *b2++)
5274 return 1;
5275
5276 return 0;
5277 #endif /* not VMS */
5278 }
5279 #endif /* no bcmp */
5280 #endif /* not BSTRING */
5281 \f
5282 #ifndef HAVE_STRSIGNAL
5283 char *
5284 strsignal (code)
5285 int code;
5286 {
5287 char *signame = 0;
5288
5289 if (0 <= code && code < NSIG)
5290 {
5291 #ifdef VMS
5292 signame = sys_errlist[code];
5293 #else
5294 /* Cast to suppress warning if the table has const char *. */
5295 signame = (char *) sys_siglist[code];
5296 #endif
5297 }
5298
5299 return signame;
5300 }
5301 #endif /* HAVE_STRSIGNAL */
5302 \f
5303 /* All the Macintosh stuffs go here */
5304
5305 #ifdef macintosh
5306
5307 #include <Files.h>
5308 #include <MacTypes.h>
5309 #include <TextUtils.h>
5310 #include <Folders.h>
5311
5312 #include <dirent.h>
5313 #include <sys/stat.h>
5314 #include <string.h>
5315 #include <pwd.h>
5316 #include <sys/param.h>
5317
5318 /* Convert a Mac pathname to Unix form. A Mac full pathname is one
5319 that does not begin with a ':' and contains at least one ':'. A Mac
5320 full pathname causes an '/' to be prepended to the Unix pathname.
5321 The algorithm for the rest of the pathname is as follows:
5322 For each segment between two ':',
5323 if it is non-null, copy as is and then add a '/' at the end,
5324 otherwise, insert a "../" into the Unix pathname.
5325 Returns 1 if successful; 0 if fails. */
5326
5327 int
5328 Mac2UnixPathname (const char *mfn, char *ufn, int ufnbuflen)
5329 {
5330 const char *p, *q, *pe;
5331
5332 strcpy (ufn, "");
5333
5334 if (*mfn == '\0')
5335 return 1;
5336
5337 p = strchr (mfn, ':');
5338 if (p != 0 && p != mfn) /* full pathname */
5339 strcat (ufn, "/");
5340
5341 p = mfn;
5342 if (*p == ':')
5343 p++;
5344
5345 pe = mfn + strlen (mfn);
5346 while (p < pe)
5347 {
5348 q = strchr (p, ':');
5349 if (q)
5350 {
5351 if (q == p)
5352 { /* two consecutive ':' */
5353 if (strlen (ufn) + 3 >= ufnbuflen)
5354 return 0;
5355 strcat (ufn, "../");
5356 }
5357 else
5358 {
5359 if (strlen (ufn) + (q - p) + 1 >= ufnbuflen)
5360 return 0;
5361 strncat (ufn, p, q - p);
5362 strcat (ufn, "/");
5363 }
5364 p = q + 1;
5365 }
5366 else
5367 {
5368 if (strlen (ufn) + (pe - p) >= ufnbuflen)
5369 return 0;
5370 strncat (ufn, p, pe - p); /* no separator for last one */
5371 p = pe;
5372 }
5373 }
5374
5375 return 1;
5376 }
5377
5378 extern char *GetTempDirName ();
5379
5380 /* Convert a Unix pathname to Mac form. Approximately reverse of the
5381 above in algorithm. */
5382 int
5383 Unix2MacPathname (const char *ufn, char *mfn, int mfnbuflen)
5384 {
5385 const char *p, *q, *pe;
5386 char expandedPathname[MAXPATHLEN+1];
5387
5388 strcpy (mfn, "");
5389
5390 if (*ufn == '\0')
5391 return 1;
5392
5393 p = ufn;
5394
5395 /* Check for and handle volume names. Last comparison: strangely
5396 somewhere `/.emacs' is passed. A temporary fix for now. */
5397 if (*p == '/' && strchr (p+1, '/') == NULL && strcmp (p, "/.emacs") != 0)
5398 {
5399 if (strlen (p) + 1 > mfnbuflen)
5400 return 0;
5401 strcpy (mfn, p+1);
5402 strcat (mfn, ":");
5403 return 1;
5404 }
5405
5406 if (strncmp (p, "~emacs/", 7) == 0)
5407 { /* expand to emacs dir found by InitEmacsPasswdDir */
5408 struct passwd *pw = getpwnam ("emacs");
5409 p += 7;
5410 if (strlen (pw->pw_dir) + strlen (p) > MAXPATHLEN)
5411 return 0;
5412 strcpy (expandedPathname, pw->pw_dir);
5413 strcat (expandedPathname, p);
5414 p = expandedPathname;
5415 /* Now p points to the pathname with emacs dir prefix. */
5416 }
5417 else if (strncmp (p, "/tmp/", 5) == 0)
5418 {
5419 char *t = GetTempDirName ();
5420 p += 5;
5421 if (strlen (t) + strlen (p) > MAXPATHLEN)
5422 return 0;
5423 strcpy (expandedPathname, t);
5424 strcat (expandedPathname, p);
5425 p = expandedPathname;
5426 /* Now p points to the pathname with emacs dir prefix. */
5427 }
5428 else if (*p != '/') /* relative pathname */
5429 strcat (mfn, ":");
5430
5431 if (*p == '/')
5432 p++;
5433
5434 pe = p + strlen (p);
5435 while (p < pe)
5436 {
5437 q = strchr (p, '/');
5438 if (q)
5439 {
5440 if (q - p == 2 && *p == '.' && *(p+1) == '.')
5441 {
5442 if (strlen (mfn) + 1 >= mfnbuflen)
5443 return 0;
5444 strcat (mfn, ":");
5445 }
5446 else
5447 {
5448 if (strlen (mfn) + (q - p) + 1 >= mfnbuflen)
5449 return 0;
5450 strncat (mfn, p, q - p);
5451 strcat (mfn, ":");
5452 }
5453 p = q + 1;
5454 }
5455 else
5456 {
5457 if (strlen (mfn) + (pe - p) >= mfnbuflen)
5458 return 0;
5459 strncat (mfn, p, pe - p);
5460 p = pe;
5461 }
5462 }
5463
5464 return 1;
5465 }
5466
5467 /* The following functions with "sys_" prefix are stubs to Unix
5468 functions that have already been implemented by CW or MPW. The
5469 calls to them in Emacs source course are #define'd to call the sys_
5470 versions by the header files s-mac.h. In these stubs pathnames are
5471 converted between their Unix and Mac forms. */
5472 /* Unix Epoch is Jan 1, 1970 while Mac Epoch is Jan 1, 1904: 66 years
5473 + 17 leap days */
5474 #define MAC_UNIX_EPOCH_DIFF ((365L * 66 + 17) * 24 * 60 * 60)
5475
5476 /* CW Epoch is Jan 1, 1900 (aaarghhhhh!); remember, 1900 is not a leap
5477 year! */
5478 #define CW_UNIX_EPOCH_DIFF ((365L * 70 + 17) * 24 * 60 * 60)
5479
5480 /* Define our own stat function for both MrC and CW. The reason for
5481 doing this: "stat" is both the name of a struct and function name:
5482 we can't #define stat to something else to
5483 redirect Emacs's calls to our own version that converts Unix style
5484 filenames to Mac style filename because all sorts of compilation
5485 errors will be generated if stat is #define'd to be something else. */
5486
5487 int
5488 stat (const char *path, struct stat *buf)
5489 {
5490 char MacPathname[MAXPATHLEN+1];
5491 CInfoPBRec cipb;
5492
5493 if (Unix2MacPathname (path, MacPathname, MAXPATHLEN+1) == 0)
5494 return -1;
5495
5496 c2pstr (MacPathname);
5497 cipb.hFileInfo.ioNamePtr = MacPathname;
5498 cipb.hFileInfo.ioVRefNum = 0;
5499 cipb.hFileInfo.ioDirID = 0;
5500 cipb.hFileInfo.ioFDirIndex = 0; /* set to 0 to get information about specific dir or file */
5501
5502 errno = PBGetCatInfo (&cipb, false);
5503 if (errno == -43) /* -43: fnfErr defined in Errors.h */
5504 errno = ENOENT;
5505 if (errno != noErr)
5506 return -1;
5507
5508 if (cipb.hFileInfo.ioFlAttrib & 0x10)
5509 { /* bit 4 = 1 for directories */
5510 buf->st_mode = S_IFDIR | S_IREAD | S_IEXEC;
5511 if (!(cipb.hFileInfo.ioFlAttrib & 0x1)) /* bit 1 = 1 for locked files/directories */
5512 buf->st_mode |= S_IWRITE;
5513 buf->st_ino = cipb.dirInfo.ioDrDirID;
5514 buf->st_dev = cipb.dirInfo.ioVRefNum;
5515 buf->st_size = cipb.dirInfo.ioDrNmFls; /* size of dir = number of files and dirs */
5516 buf->st_atime = buf->st_mtime = cipb.dirInfo.ioDrMdDat - MAC_UNIX_EPOCH_DIFF;
5517 buf->st_ctime = cipb.dirInfo.ioDrCrDat - MAC_UNIX_EPOCH_DIFF;
5518 }
5519 else
5520 {
5521 buf->st_mode = S_IFREG | S_IREAD;
5522 if (!(cipb.hFileInfo.ioFlAttrib & 0x1)) /* bit 1 = 1 for locked files/directories */
5523 buf->st_mode |= S_IWRITE;
5524 if (cipb.hFileInfo.ioFlFndrInfo.fdType == 'APPL')
5525 buf->st_mode |= S_IEXEC;
5526 buf->st_ino = cipb.hFileInfo.ioDirID;
5527 buf->st_dev = cipb.hFileInfo.ioVRefNum;
5528 buf->st_size = cipb.hFileInfo.ioFlLgLen;
5529 buf->st_atime = buf->st_mtime = cipb.hFileInfo.ioFlMdDat - MAC_UNIX_EPOCH_DIFF;
5530 buf->st_ctime = cipb.hFileInfo.ioFlCrDat - MAC_UNIX_EPOCH_DIFF;
5531 }
5532 buf->st_nlink = 1;
5533 buf->st_uid = getuid ();
5534 buf->st_gid = getgid ();
5535 buf->st_rdev = 0;
5536
5537 return 0;
5538 }
5539
5540 #if __MRC__
5541
5542 /* CW defines fstat in stat.mac.c while MPW does not provide this
5543 function. Without the information of how to get from a file
5544 descriptor in MPW StdCLib to a Mac OS file spec, it should be hard
5545 to implement this function. Fortunately, there is only one place
5546 where this function is called in our configuration: in fileio.c,
5547 where only the st_dev and st_ino fields are used to determine
5548 whether two fildes point to different i-nodes to prevent copying
5549 a file onto itself equal. What we have here probably needs
5550 improvement. */
5551 int
5552 fstat (int fildes, struct stat *buf)
5553 {
5554 buf->st_dev = 0;
5555 buf->st_ino = fildes;
5556 return 0; /* success */
5557 }
5558
5559 #endif /* __MRC__ */
5560
5561 /* From Think Reference code example */
5562 int
5563 mkdir (const char *dirname, int mode)
5564 {
5565 #pragma unused (mode)
5566
5567 HFileParam hfpb;
5568 char MacPathname[MAXPATHLEN+1];
5569
5570 if (Unix2MacPathname (dirname, MacPathname, MAXPATHLEN+1) == 0)
5571 return -1;
5572
5573 c2pstr (MacPathname);
5574 hfpb.ioNamePtr = MacPathname;
5575 hfpb.ioVRefNum = 0; /*ignored unless name is invalid */
5576 hfpb.ioDirID = 0; /*parent is the root */
5577
5578 /* Just return the Mac OSErr code for now. */
5579 errno = PBDirCreate ((HParmBlkPtr) &hfpb, false);
5580 return errno == noErr ? 0 : -1;
5581 }
5582
5583 int
5584 rmdir (const char *dirname)
5585 {
5586 HFileParam hfpb;
5587 char MacPathname[MAXPATHLEN+1];
5588
5589 if (Unix2MacPathname (dirname, MacPathname, MAXPATHLEN+1) == 0)
5590 return -1;
5591
5592 c2pstr (MacPathname);
5593 hfpb.ioNamePtr = MacPathname;
5594 hfpb.ioVRefNum = 0; /*ignored unless name is invalid */
5595 hfpb.ioDirID = 0; /*parent is the root */
5596
5597 errno = PBHDelete ((HParmBlkPtr) &hfpb, false);
5598 return errno == noErr ? 0 : -1;
5599 }
5600
5601 #ifdef __MRC__
5602
5603 /* No implementation yet. */
5604 int
5605 execvp (const char *path, ...)
5606 {
5607 return -1;
5608 }
5609
5610 #endif /* __MRC__ */
5611
5612 int
5613 utime (const char *path, const struct utimbuf *times)
5614 {
5615 char MacPathname[MAXPATHLEN+1];
5616 CInfoPBRec cipb;
5617
5618 if (Unix2MacPathname (path, MacPathname, MAXPATHLEN+1) == 0)
5619 return -1;
5620
5621 c2pstr (MacPathname);
5622 cipb.hFileInfo.ioNamePtr = MacPathname;
5623 cipb.hFileInfo.ioVRefNum = 0;
5624 cipb.hFileInfo.ioDirID = 0;
5625 /* Set to 0 to get information about specific dir or file. */
5626 cipb.hFileInfo.ioFDirIndex = 0;
5627
5628 errno = PBGetCatInfo (&cipb, false);
5629 if (errno != noErr)
5630 return -1;
5631
5632 if (cipb.hFileInfo.ioFlAttrib & 0x10)
5633 { /* bit 4 = 1 for directories */
5634 if (times)
5635 cipb.dirInfo.ioDrMdDat = times->modtime + MAC_UNIX_EPOCH_DIFF;
5636 else
5637 GetDateTime (&cipb.dirInfo.ioDrMdDat);
5638 }
5639 else
5640 {
5641 if (times)
5642 cipb.hFileInfo.ioFlMdDat = times->modtime + MAC_UNIX_EPOCH_DIFF;
5643 else
5644 GetDateTime (&cipb.hFileInfo.ioFlMdDat);
5645 }
5646
5647 errno = PBSetCatInfo (&cipb, false);
5648 return errno == noErr ? 0 : -1;
5649 }
5650
5651 #define F_OK 0
5652 #define X_OK 1
5653 #define W_OK 2
5654
5655 /* Like stat, but test for access mode in hfpb.ioFlAttrib. */
5656 int
5657 access (const char *path, int mode)
5658 {
5659 char MacPathname[MAXPATHLEN+1];
5660 CInfoPBRec cipb;
5661
5662 if (Unix2MacPathname (path, MacPathname, MAXPATHLEN+1) == 0)
5663 return -1;
5664
5665 c2pstr (MacPathname);
5666 cipb.hFileInfo.ioNamePtr = MacPathname;
5667 cipb.hFileInfo.ioVRefNum = 0;
5668 cipb.hFileInfo.ioDirID = 0;
5669 cipb.hFileInfo.ioFDirIndex = 0; /* set to 0 to get information about specific dir or file */
5670
5671 errno = PBGetCatInfo (&cipb, false);
5672 if (errno != noErr)
5673 return -1;
5674
5675 if (mode == F_OK) /* got this far, file exists */
5676 return 0;
5677
5678 if (mode & X_OK)
5679 if (cipb.hFileInfo.ioFlAttrib & 0x10) /* path refers to a directory */
5680 return 0;
5681 else
5682 {
5683 if (cipb.hFileInfo.ioFlFndrInfo.fdType == 'APPL')
5684 return 0;
5685 else
5686 return -1;
5687 }
5688
5689 if (mode & W_OK)
5690 return (cipb.hFileInfo.ioFlAttrib & 0x1) ? -1 : 0; /* don't allow if lock bit on */
5691
5692 return -1;
5693 }
5694
5695 #define DEV_NULL_FD 0x10000
5696
5697 #undef open
5698 int
5699 sys_open (const char *path, int oflag)
5700 {
5701 char MacPathname[MAXPATHLEN+1];
5702
5703 if (strcmp (path, "/dev/null") == 0)
5704 return DEV_NULL_FD; /* some bogus fd to be ignored in write */
5705
5706 if (Unix2MacPathname (path, MacPathname, MAXPATHLEN+1) == 0)
5707 return -1;
5708 else
5709 return open (MacPathname, oflag);
5710 }
5711
5712 #undef creat
5713 int
5714 sys_creat (const char *path, mode_t mode)
5715 {
5716 char MacPathname[MAXPATHLEN+1];
5717
5718 if (Unix2MacPathname (path, MacPathname, MAXPATHLEN+1) == 0)
5719 return -1;
5720 else
5721 return creat (MacPathname, mode);
5722 }
5723
5724 #undef unlink
5725 int
5726 sys_unlink (const char *path)
5727 {
5728 char MacPathname[MAXPATHLEN+1];
5729
5730 if (Unix2MacPathname (path, MacPathname, MAXPATHLEN+1) == 0)
5731 return -1;
5732 else
5733 return unlink (MacPathname);
5734 }
5735
5736 #undef read
5737 int
5738 sys_read (int fildes, char *buf, int count)
5739 {
5740 if (fildes == 0)
5741 { /* if stdin, call (non-echoing) "getch" in console.h */
5742 if (MacKeyPending ())
5743 { /* don't wait for a key if none has been pressed */
5744 *buf = MacGetChar ();
5745 return 1;
5746 }
5747 else
5748 return 0;
5749 }
5750 else
5751 return read (fildes, buf, count);
5752 }
5753
5754 #undef write
5755 int
5756 sys_write (int fildes, char *buf, int count)
5757 {
5758 if (fildes == DEV_NULL_FD)
5759 return count;
5760 else
5761 return write (fildes, buf, count);
5762 }
5763
5764 #undef rename
5765 int
5766 sys_rename (const char * old_name, const char * new_name)
5767 {
5768 char MacOldName[MAXPATHLEN+1], MacNewName[MAXPATHLEN+1];
5769
5770 if (strcmp (old_name, new_name) == 0)
5771 return 0;
5772
5773 if (Unix2MacPathname (old_name, MacOldName, MAXPATHLEN+1) == 0)
5774 return 1;
5775
5776 if (Unix2MacPathname (new_name, MacNewName, MAXPATHLEN+1) == 0)
5777 return 1;
5778
5779 return rename (MacOldName, MacNewName);
5780 }
5781
5782 #undef fopen
5783 extern FILE *fopen (const char *name, const char *mode);
5784 FILE
5785 sys_fopen (const char *name, const char *mode)
5786 {
5787 char MacPathname[MAXPATHLEN+1];
5788
5789 if (Unix2MacPathname (name, MacPathname, MAXPATHLEN+1) == 0)
5790 return 0;
5791 else
5792 return fopen (MacPathname, mode);
5793 }
5794
5795 #include <Events.h>
5796
5797 long targetTicks = 0;
5798
5799 #ifdef __MRC__
5800 __sigfun alarm_signal_func = (__sigfun) 0;
5801 #elif __MWERKS__
5802 __signal_func_ptr alarm_signal_func = (__signal_func_ptr) 0;
5803 #else
5804 You lose!!!
5805 #endif
5806
5807 /* These functions simulate SIG_ALRM. The stub for function signal
5808 stores the signal handler function in alarm_signal_func if a
5809 SIG_ALRM is encountered. CheckAlarm is called in mac_read_socket,
5810 which emacs calls periodically. A pending alarm is represented by
5811 a non-zero targetTicks value. CheckAlarm calls the handler
5812 function pointed to by alarm_signal_func if one has been set up and
5813 an alarm is pending. */
5814 void
5815 CheckAlarm ()
5816 {
5817 if (targetTicks && TickCount () > targetTicks)
5818 {
5819 targetTicks = 0;
5820 if (alarm_signal_func)
5821 (*alarm_signal_func)(SIGALRM);
5822 }
5823 }
5824
5825 /* Called in sys_select to wait for an alarm signal to arrive. */
5826 int
5827 pause ()
5828 {
5829 unsigned long finalTick;
5830
5831 if (!targetTicks) /* no alarm pending */
5832 return -1;
5833
5834 while (TickCount () <= targetTicks)
5835 Delay (1UL, &finalTick); /* wait for 1/60 second before trying again */
5836
5837 targetTicks = 0;
5838 if (alarm_signal_func)
5839 (*alarm_signal_func)(SIGALRM);
5840
5841 return 0;
5842 }
5843
5844 int
5845 alarm (int seconds)
5846 {
5847 long remaining = targetTicks ? (TickCount () - targetTicks) / 60 : 0;
5848
5849 targetTicks = seconds ? TickCount () + 60 * seconds : 0;
5850
5851 return (remaining < 0) ? 0 : (unsigned int) remaining;
5852 }
5853
5854 #undef signal
5855 #ifdef __MRC__
5856 extern __sigfun signal (int signal, __sigfun signal_func);
5857 __sigfun
5858 sys_signal (int signal_num, __sigfun signal_func)
5859 #elif __MWERKS__
5860 extern __signal_func_ptr signal (int signal, __signal_func_ptr signal_func);
5861 __signal_func_ptr
5862 sys_signal (int signal_num, __signal_func_ptr signal_func)
5863 #else
5864 You lose!!!
5865 #endif
5866 {
5867 if (signal_num != SIGALRM)
5868 return signal (signal_num, signal_func);
5869 else
5870 {
5871 #ifdef __MRC__
5872 __sigfun old_signal_func;
5873 #elif __MWERKS__
5874 __signal_func_ptr old_signal_func;
5875 #else
5876 You lose!!!
5877 #endif
5878 old_signal_func = alarm_signal_func;
5879 alarm_signal_func = signal_func;
5880 return old_signal_func;
5881 }
5882 }
5883
5884 /* The time functions adjust time values according to the difference
5885 between the Unix and CW epoches. */
5886
5887 #undef gmtime
5888 extern struct tm *gmtime (const time_t *);
5889 struct tm
5890 sys_gmtime (const time_t *timer)
5891 {
5892 time_t unixTime = *timer + CW_UNIX_EPOCH_DIFF;
5893
5894 return gmtime (&unixTime);
5895 }
5896
5897 #undef localtime
5898 extern struct tm *localtime (const time_t *);
5899 struct tm *
5900 sys_localtime (const time_t *timer)
5901 {
5902 time_t unixTime = *timer + CW_UNIX_EPOCH_DIFF;
5903
5904 return localtime (&unixTime);
5905 }
5906
5907 #undef ctime
5908 extern char *ctime (const time_t *);
5909 char *
5910 sys_ctime (const time_t *timer)
5911 {
5912 time_t unixTime = *timer + CW_UNIX_EPOCH_DIFF;
5913
5914 return ctime (&unixTime);
5915 }
5916
5917 #undef time
5918 extern time_t time (time_t *);
5919 time_t
5920 sys_time (time_t *timer)
5921 {
5922 time_t macTime = time (NULL) - CW_UNIX_EPOCH_DIFF;
5923
5924 if (timer)
5925 *timer = macTime;
5926
5927 return macTime;
5928 }
5929
5930 /* no subprocesses, empty wait */
5931 int
5932 wait (int pid)
5933 {
5934 return 0;
5935 }
5936
5937 void
5938 croak (char *badfunc)
5939 {
5940 printf ("%s not yet implemented\r\n", badfunc);
5941 exit (1);
5942 }
5943
5944 char *
5945 index (const char * str, int chr)
5946 {
5947 return strchr (str, chr);
5948 }
5949
5950 char *e[] = { 0 };
5951 char **environ = &e[0];
5952
5953 char *
5954 mktemp (char *template)
5955 {
5956 int len, k;
5957 static seqnum = 0;
5958
5959 len = strlen (template);
5960 k = len - 1;
5961 while (k >= 0 && template[k] == 'X')
5962 k--;
5963
5964 k++; /* make k index of first 'X' */
5965
5966 if (k < len)
5967 {
5968 /* Zero filled, number of digits equal to the number of X's. */
5969 sprintf (&template[k], "%0*d", len-k, seqnum++);
5970
5971 return template;
5972 }
5973 else
5974 return 0;
5975 }
5976
5977 /* Emulate getpwuid, getpwnam and others. */
5978
5979 #define PASSWD_FIELD_SIZE 256
5980
5981 static char myPasswdName[PASSWD_FIELD_SIZE];
5982 static char myPasswdDir[MAXPATHLEN+1];
5983
5984 static struct passwd myPasswd =
5985 {
5986 myPasswdName,
5987 myPasswdDir,
5988 };
5989
5990 /* Initialized by main () in macterm.c to pathname of emacs directory. */
5991 char emacsPasswdDir[MAXPATHLEN+1];
5992
5993 void
5994 InitEmacsPasswdDir ()
5995 {
5996 int found = false;
5997
5998 if (getwd (emacsPasswdDir) && getwd (myPasswdDir))
5999 {
6000 /* Need pathname of first ancestor that begins with `emacs' since
6001 Mac emacs application is somewhere in the emacs-20.3 tree. */
6002 int len = strlen (emacsPasswdDir);
6003 /* J points to the "/" following the directory name being compared. */
6004 int j = len - 1;
6005 int i = j - 1;
6006 while (i >= 0 && !found)
6007 {
6008 while (i >= 0 && emacsPasswdDir[i] != '/')
6009 i--;
6010 if (emacsPasswdDir[i] == '/' && i+5 < len)
6011 found = (strncmp (&(emacsPasswdDir[i+1]), "emacs", 5) == 0);
6012 if (found)
6013 emacsPasswdDir[j+1] = '\0';
6014 else
6015 {
6016 j = i;
6017 i = j - 1;
6018 }
6019 }
6020 }
6021
6022 if (!found)
6023 { /* setting to "/" probably won't work,
6024 but set it to something anyway. */
6025 strcpy (emacsPasswdDir, "/");
6026 strcpy (myPasswdDir, "/");
6027 }
6028 }
6029
6030 static struct passwd emacsPasswd =
6031 {
6032 "emacs",
6033 emacsPasswdDir,
6034 };
6035
6036 static int myPasswdInited = 0;
6037
6038 static void
6039 InitMyPasswd ()
6040 {
6041 char **ownerName;
6042
6043 /* Note: myPasswdDir initialized in InitEmacsPasswdDir to directory
6044 where Emacs was started. */
6045
6046 ownerName = (char **) GetResource ('STR ',-16096);
6047 if (ownerName)
6048 {
6049 HLock (ownerName);
6050 BlockMove ((unsigned char *) *ownerName,
6051 (unsigned char *) myPasswdName, *ownerName[0] + 1);
6052 HUnlock (ownerName);
6053 p2cstr ((unsigned char *) myPasswdName);
6054 }
6055 else
6056 myPasswdName[0] = 0;
6057 }
6058
6059 struct passwd *
6060 getpwuid (uid_t uid)
6061 {
6062 if (!myPasswdInited)
6063 {
6064 InitMyPasswd ();
6065 myPasswdInited = 1;
6066 }
6067
6068 return &myPasswd;
6069 }
6070
6071 struct passwd *
6072 getpwnam (const char *name)
6073 {
6074 if (strcmp (name, "emacs") == 0)
6075 return &emacsPasswd;
6076
6077 if (!myPasswdInited)
6078 {
6079 InitMyPasswd ();
6080 myPasswdInited = 1;
6081 }
6082
6083 return &myPasswd;
6084 }
6085
6086 /* The functions fork, kill, sigsetmask, sigblock, request_sigio,
6087 setpgrp, setpriority, and unrequest_sigio are defined to be empty
6088 as in msdos.c. */
6089
6090 int
6091 fork ()
6092 {
6093 return -1;
6094 }
6095
6096 int
6097 kill (int x, int y)
6098 {
6099 return -1;
6100 }
6101
6102 int
6103 sigsetmask (int x)
6104 {
6105 return 0;
6106 }
6107
6108 int
6109 sigblock (int mask)
6110 {
6111 return 0;
6112 }
6113
6114 void
6115 request_sigio (void)
6116 {
6117 }
6118
6119 int
6120 setpgrp ()
6121 {
6122 return 0;
6123 }
6124
6125 void
6126 unrequest_sigio (void)
6127 {
6128 }
6129
6130 /* djgpp does not implement pipe either. */
6131 int
6132 pipe (int _fildes[2])
6133 {
6134 errno = EACCES;
6135 return -1;
6136 }
6137
6138 /* Hard and symbolic links. */
6139 int
6140 symlink (const char *name1, const char *name2)
6141 {
6142 errno = ENOENT;
6143 return -1;
6144 }
6145
6146 int
6147 link (const char *name1, const char *name2)
6148 {
6149 errno = ENOENT;
6150 return -1;
6151 }
6152
6153 int
6154 lstat (const char *path, struct stat *sb)
6155 {
6156 return stat (path, sb);
6157 }
6158
6159 int
6160 readlink (const char *path, char *buf, int bufsiz)
6161 {
6162 errno = ENOENT;
6163 return -1;
6164 }
6165
6166 mode_t
6167 umask (mode_t numask)
6168 {
6169 static mode_t mask = 022;
6170 mode_t oldmask = mask;
6171 mask = numask;
6172 return oldmask;
6173 }
6174
6175 int
6176 chmod (const char *path, mode_t mode)
6177 {
6178 /* say it always succeed for now */
6179 return 0;
6180 }
6181
6182 int
6183 dup (int oldd)
6184 {
6185 #ifdef __MRC__
6186 return fcntl (oldd, F_DUPFD, 0);
6187 #elif __MWERKS__
6188 /* current implementation of fcntl in fcntl.mac.c simply returns old
6189 descriptor */
6190 return fcntl (oldd, F_DUPFD);
6191 #else
6192 You lose!!!
6193 #endif
6194 }
6195
6196 /* This is from the original sysdep.c. Emulate BSD dup2. First close
6197 newd if it already exists. Then, attempt to dup oldd. If not
6198 successful, call dup2 recursively until we are, then close the
6199 unsuccessful ones. */
6200 int
6201 dup2 (int oldd, int newd)
6202 {
6203 int fd, ret;
6204
6205 close (newd);
6206
6207 fd = dup (oldd);
6208 if (fd == -1)
6209 return -1;
6210 if (fd == newd)
6211 return newd;
6212 ret = dup2 (oldd, newd);
6213 close (fd);
6214 return ret;
6215 }
6216
6217 /* let it fail for now */
6218 char *
6219 sbrk (int incr)
6220 {
6221 return (char *) -1;
6222 }
6223
6224 int
6225 fsync (int fd)
6226 {
6227 return 0;
6228 }
6229
6230 int
6231 ioctl (int d, int request, void *argp)
6232 {
6233 return -1;
6234 }
6235
6236 #ifdef __MRC__
6237 int
6238 isatty (int fildes)
6239 {
6240 if (fildes >=0 && fildes <= 2)
6241 return 1;
6242 else
6243 return 0;
6244 }
6245
6246 int
6247 getgid ()
6248 {
6249 return 100;
6250 }
6251
6252 int
6253 getegid ()
6254 {
6255 return 100;
6256 }
6257
6258 int
6259 getuid ()
6260 {
6261 return 200;
6262 }
6263
6264 int
6265 geteuid ()
6266 {
6267 return 200;
6268 }
6269
6270 unsigned int
6271 sleep (unsigned int seconds)
6272 {
6273 unsigned long finalTick;
6274
6275 Delay (seconds * 60UL, &finalTick);
6276 return (0);
6277 }
6278 #endif /* __MRC__ */
6279
6280 #ifdef __MWERKS__
6281 #undef getpid
6282 int
6283 getpid ()
6284 {
6285 return 9999;
6286 }
6287 #endif /* __MWERKS__ */
6288
6289 /* Return the path to the directory in which Emacs can create
6290 temporary files. The MacOS "temporary items" directory cannot be
6291 used because it removes the file written by a process when it
6292 exits. In that sense it's more like "/dev/null" than "/tmp" (but
6293 again not exactly). And of course Emacs needs to read back the
6294 files written by its subprocesses. So here we write the files to a
6295 directory "Emacs" in the Preferences Folder. This directory is
6296 created if it does not exist. */
6297 static char *
6298 GetTempDirName ()
6299 {
6300 static char *TempDirName = NULL;
6301 short vRefNum;
6302 long dirID;
6303 OSErr err;
6304 Str255 dirName, fullPath;
6305 CInfoPBRec cpb;
6306 char unixDirName[MAXPATHLEN+1];
6307 DIR *dir;
6308
6309 /* Cache directory name with pointer TempDirName.
6310 Look for it only the first time. */
6311 if (!TempDirName)
6312 {
6313 err = FindFolder (kOnSystemDisk, kPreferencesFolderType,
6314 kCreateFolder, &vRefNum, &dirID);
6315 if (err != noErr)
6316 return NULL;
6317
6318 *fullPath = '\0';
6319 cpb.dirInfo.ioNamePtr = dirName;
6320 cpb.dirInfo.ioDrParID = dirID;
6321
6322 /* Standard ref num to full path name loop */
6323 do {
6324 cpb.dirInfo.ioVRefNum = vRefNum;
6325 cpb.dirInfo.ioFDirIndex = -1;
6326 cpb.dirInfo.ioDrDirID = cpb.dirInfo.ioDrParID;
6327
6328 err = PBGetCatInfo (&cpb, false);
6329
6330 p2cstr (dirName);
6331 strcat (dirName, ":");
6332 if (strlen (fullPath) + strlen (dirName) <= MAXPATHLEN)
6333 {
6334 strcat (dirName, fullPath);
6335 strcpy (fullPath, dirName);
6336 }
6337 else
6338 return NULL;
6339 }
6340 while (cpb.dirInfo.ioDrDirID != fsRtDirID && err == noErr);
6341
6342 if (strlen (fullPath) + 6 <= MAXPATHLEN)
6343 strcat (fullPath, "Emacs:");
6344 else
6345 return NULL;
6346
6347 if (Mac2UnixPathname (fullPath, unixDirName, MAXPATHLEN+1) == 0)
6348 return NULL;
6349
6350 dir = opendir (unixDirName); /* check whether temp directory exists */
6351 if (dir)
6352 closedir (dir);
6353 else if (mkdir (unixDirName, 0700) != 0) /* create it if not */
6354 return NULL;
6355
6356 TempDirName = (char *) malloc (strlen (unixDirName) + 1);
6357 strcpy (TempDirName, unixDirName);
6358 }
6359
6360 return TempDirName;
6361 }
6362
6363 char *
6364 getenv (const char * name)
6365 {
6366 if (strcmp (name, "TERM") == 0)
6367 return "vt100";
6368 else if (strcmp (name, "TERMCAP") == 0)
6369 /* for debugging purpose when code was still outputting to dumb terminal */
6370 return "d0|vt100|vt100-am|vt100am|dec vt100:do=[do]:co#100:li#32:cl=[cl]:sf=[sf]:km:\
6371 :le=[le]:bs:am:cm=[cm-%d,%d]:nd=[nd]:up=[up]:ce=[ce]:cd=[cd]:so=[so]:se=[se]:\
6372 :us=[us]:ue=[ue]:md=[md]:mr=[mr]:mb=[mb]:me=[me]:is=[is]:\
6373 :rf=/usr/share/lib/tabset/vt100:rs=[rs]:ks=[ks]:ke=[ke]:\
6374 :ku=\\036:kd=\\037:kr=\\035:kl=\\034:kb=[kb]:ho=[ho]:k1=[k1]:k2=[k2]:k3=[k3]:k4=[k4]:\
6375 :pt:sr=[sr]:vt#3:xn:sc=[sc]:rc=[rc]:cs=[cs-%d,%d]";
6376 else if (strcmp (name, "TMPDIR") == 0)
6377 return GetTempDirName ();
6378 else
6379 return (NULL);
6380 }
6381
6382 #ifdef __MRC__
6383 #include <utsname.h>
6384
6385 int
6386 uname (struct utsname *name)
6387 {
6388 char **systemName;
6389 systemName = GetString (-16413); /* IM - Resource Manager Reference */
6390 if (systemName)
6391 {
6392 BlockMove (*systemName, name->nodename, (*systemName)[0]+1);
6393 p2cstr (name->nodename);
6394 }
6395 else
6396 return -1;
6397 }
6398 #endif
6399
6400 #include <Processes.h>
6401 #include <EPPC.h>
6402
6403 /* Event class of HLE sent to subprocess. */
6404 const OSType kEmacsSubprocessSend = 'ESND';
6405 /* Event class of HLE sent back from subprocess. */
6406 const OSType kEmacsSubprocessReply = 'ERPY';
6407
6408 char *
6409 mystrchr (char *s, char c)
6410 {
6411 while (*s && *s != c)
6412 {
6413 if (*s == '\\')
6414 s++;
6415 s++;
6416 }
6417
6418 if (*s)
6419 {
6420 *s = '\0';
6421 return s;
6422 }
6423 else
6424 return NULL;
6425 }
6426
6427 char *
6428 mystrtok (char *s)
6429 {
6430 while (*s)
6431 s++;
6432
6433 return s + 1;
6434 }
6435
6436 void
6437 mystrcpy (char *to, char *from)
6438 {
6439 while (*from)
6440 {
6441 if (*from == '\\')
6442 from++;
6443 *to++ = *from++;
6444 }
6445 *to = '\0';
6446 }
6447
6448 /* Start a Mac subprocess. Arguments for it is passed in argv (null
6449 terminated). The process should run with the default directory
6450 "workdir", read input from "infn", and write output and error to
6451 "outfn" and "errfn", resp. The Process Manager call
6452 LaunchApplication is used to start the subprocess. We use high
6453 level events as the mechanism to pass arguments to the subprocess
6454 and to make Emacs wait for the subprocess to terminate and pass
6455 back a result code. The bulk of the code here packs the arguments
6456 into one message to be passed together with the high level event.
6457 Emacs also sometimes starts a subprocess using a shell to perform
6458 wildcard filename expansion. Since we don't really have a shell on
6459 the Mac, this case is detected and the starting of the shell is
6460 by-passed. We really need to add code here to do filename
6461 expansion to support such functionality. */
6462 int
6463 run_mac_command (argv, workdir, infn, outfn, errfn)
6464 unsigned char **argv;
6465 const char *workdir;
6466 const char *infn, *outfn, errfn;
6467 {
6468 char macappname[MAXPATHLEN+1], macworkdir[MAXPATHLEN+1];
6469 char macinfn[MAXPATHLEN+1], macoutfn[MAXPATHLEN+1], macerrfn[MAXPATHLEN+1];
6470 int paramlen, argc, newargc, j, retries;
6471 char **newargv, *param, *p;
6472 OSErr iErr;
6473 FSSpec spec;
6474 LaunchParamBlockRec lpbr;
6475 EventRecord sendEvent, replyEvent;
6476 RgnHandle cursorRegionHdl;
6477 TargetID targ;
6478 unsigned long refCon, len;
6479
6480 if (Unix2MacPathname (workdir, macworkdir, MAXPATHLEN+1) == 0)
6481 return -1;
6482 if (Unix2MacPathname (infn, macinfn, MAXPATHLEN+1) == 0)
6483 return -1;
6484 if (Unix2MacPathname (outfn, macoutfn, MAXPATHLEN+1) == 0)
6485 return -1;
6486 if (Unix2MacPathname (errfn, macerrfn, MAXPATHLEN+1) == 0)
6487 return -1;
6488
6489 paramlen = strlen (macworkdir) + strlen (macinfn) + strlen (macoutfn) + strlen (macerrfn) + 4;
6490 /* count nulls at end of strings */
6491
6492 argc = 0;
6493 while (argv[argc])
6494 argc++;
6495
6496 if (argc == 0)
6497 return -1;
6498
6499 /* If a subprocess is invoked with a shell, we receive 3 arguments of the form:
6500 "<path to emacs bins>/sh" "-c" "<path to emacs bins>/<command> <command args>" */
6501 j = strlen (argv[0]);
6502 if (j >= 3 && strcmp (argv[0]+j-3, "/sh") == 0 && argc == 3 && strcmp (argv[1], "-c") == 0)
6503 {
6504 char *command, *t, tempmacpathname[MAXPATHLEN+1];
6505
6506 /* The arguments for the command in argv[2] are separated by spaces. Count them and put
6507 the count in newargc. */
6508 command = (char *) alloca (strlen (argv[2])+2);
6509 strcpy (command, argv[2]);
6510 if (command[strlen (command) - 1] != ' ')
6511 strcat (command, " ");
6512
6513 t = command;
6514 newargc = 0;
6515 t = mystrchr (t, ' ');
6516 while (t)
6517 {
6518 newargc++;
6519 t = mystrchr (t+1, ' ');
6520 }
6521
6522 newargv = (char **) alloca (sizeof (char *) * newargc);
6523
6524 t = command;
6525 for (j = 0; j < newargc; j++)
6526 {
6527 newargv[j] = (char *) alloca (strlen (t) + 1);
6528 mystrcpy (newargv[j], t);
6529
6530 t = mystrtok (t);
6531 paramlen += strlen (newargv[j]) + 1;
6532 }
6533
6534 if (strncmp (newargv[0], "~emacs/", 7) == 0)
6535 {
6536 if (Unix2MacPathname (newargv[0], tempmacpathname, MAXPATHLEN+1) == 0)
6537 return -1;
6538 }
6539 else
6540 { /* sometimes Emacs call "sh" without a path for the command */
6541 #if 0
6542 char *t = (char *) alloca (strlen (newargv[0]) + 7 + 1);
6543 strcpy (t, "~emacs/");
6544 strcat (t, newargv[0]);
6545 #endif
6546 Lisp_Object path;
6547 openp (Vexec_path, build_string (newargv[0]), EXEC_SUFFIXES, &path, 1);
6548
6549 if (NILP (path))
6550 return -1;
6551 if (Unix2MacPathname (XSTRING (path)->data, tempmacpathname, MAXPATHLEN+1) == 0)
6552 return -1;
6553 }
6554 strcpy (macappname, tempmacpathname);
6555 }
6556 else
6557 {
6558 if (Unix2MacPathname (argv[0], macappname, MAXPATHLEN+1) == 0)
6559 return -1;
6560
6561 newargv = (char **) alloca (sizeof (char *) * argc);
6562 newargc = argc;
6563 for (j = 1; j < argc; j++)
6564 {
6565 if (strncmp (argv[j], "~emacs/", 7) == 0)
6566 {
6567 char *t = strchr (argv[j], ' ');
6568 if (t)
6569 {
6570 char tempcmdname[MAXPATHLEN+1], tempmaccmdname[MAXPATHLEN+1];
6571 strncpy (tempcmdname, argv[j], t-argv[j]);
6572 tempcmdname[t-argv[j]] = '\0';
6573 if (Unix2MacPathname (tempcmdname, tempmaccmdname, MAXPATHLEN+1) == 0)
6574 return -1;
6575 newargv[j] = (char *) alloca (strlen (tempmaccmdname) + strlen (t) + 1);
6576 strcpy (newargv[j], tempmaccmdname);
6577 strcat (newargv[j], t);
6578 }
6579 else
6580 {
6581 char tempmaccmdname[MAXPATHLEN+1];
6582 if (Unix2MacPathname (argv[j], tempmaccmdname, MAXPATHLEN+1) == 0)
6583 return -1;
6584 newargv[j] = (char *) alloca (strlen (tempmaccmdname)+1);
6585 strcpy (newargv[j], tempmaccmdname);
6586 }
6587 }
6588 else
6589 newargv[j] = argv[j];
6590 paramlen += strlen (newargv[j]) + 1;
6591 }
6592 }
6593
6594 /* After expanding all the arguments, we now know the length of the parameter block to be
6595 sent to the subprocess as a message attached to the HLE. */
6596 param = (char *) malloc (paramlen + 1);
6597 if (!param)
6598 return -1;
6599
6600 p = param;
6601 *p++ = newargc; /* first byte of message contains number of arguments for command */
6602 strcpy (p, macworkdir);
6603 p += strlen (macworkdir);
6604 *p++ = '\0'; /* null terminate strings sent so it's possible to use strcpy over there */
6605 strcpy (p, macinfn);
6606 p += strlen (macinfn);
6607 *p++ = '\0';
6608 strcpy (p, macoutfn);
6609 p += strlen (macoutfn);
6610 *p++ = '\0';
6611 strcpy (p, macerrfn);
6612 p += strlen (macerrfn);
6613 *p++ = '\0';
6614 for (j = 1; j < newargc; j++) {
6615 strcpy (p, newargv[j]);
6616 p += strlen (newargv[j]);
6617 *p++ = '\0';
6618 }
6619
6620 c2pstr (macappname);
6621
6622 iErr = FSMakeFSSpec (0, 0, macappname, &spec);
6623
6624 if (iErr != noErr) {
6625 free (param);
6626 return -1;
6627 }
6628
6629 lpbr.launchBlockID = extendedBlock;
6630 lpbr.launchEPBLength = extendedBlockLen;
6631 lpbr.launchControlFlags = launchContinue + launchNoFileFlags;
6632 lpbr.launchAppSpec = &spec;
6633 lpbr.launchAppParameters = NULL;
6634
6635 iErr = LaunchApplication (&lpbr); /* call the subprocess */
6636 if (iErr != noErr) {
6637 free (param);
6638 return -1;
6639 }
6640
6641 sendEvent.what = kHighLevelEvent;
6642 sendEvent.message = kEmacsSubprocessSend; /* Event ID stored in "where" unused */
6643
6644 retries = 3;
6645 do { /* OS may think current subprocess has terminated if previous one terminated recently */
6646 iErr = PostHighLevelEvent (&sendEvent, &lpbr.launchProcessSN, 0, param, paramlen + 1, receiverIDisPSN);
6647 }
6648 while (iErr == sessClosedErr && retries-- > 0);
6649
6650 if (iErr != noErr) {
6651 free (param);
6652 return -1;
6653 }
6654
6655 cursorRegionHdl = NewRgn ();
6656
6657 /* Wait for the subprocess to finish, when it will send us a ERPY high level event */
6658 while (1)
6659 if (WaitNextEvent (highLevelEventMask, &replyEvent, 180, cursorRegionHdl) && replyEvent.message == kEmacsSubprocessReply)
6660 break;
6661
6662 /* The return code is sent through the refCon */
6663 iErr = AcceptHighLevelEvent (&targ, &refCon, NULL, &len);
6664 if (iErr != noErr) {
6665 DisposeHandle ((Handle) cursorRegionHdl);
6666 free (param);
6667 return -1;
6668 }
6669
6670 DisposeHandle ((Handle) cursorRegionHdl);
6671 free (param);
6672
6673 return refCon;
6674 }
6675
6676 DIR *
6677 opendir (const char *dirname)
6678 {
6679 char MacPathname[MAXPATHLEN+1];
6680 DIR *dirp;
6681 CInfoPBRec cipb;
6682 int len;
6683
6684 dirp = (DIR *) malloc (sizeof (DIR));
6685 if (!dirp)
6686 return 0;
6687
6688 /* Handle special case when dirname is "/": sets up for readir to
6689 get all mount volumes. */
6690 if (strcmp (dirname, "/") == 0) {
6691 dirp->getting_volumes = 1; /* special all mounted volumes DIR struct */
6692 dirp->current_index = 1; /* index for first volume */
6693 return dirp;
6694 }
6695
6696 /* Handle typical cases: not accessing all mounted volumes. */
6697 if (Unix2MacPathname (dirname, MacPathname, MAXPATHLEN+1) == 0)
6698 return 0;
6699
6700 /* Emacs calls opendir without the trailing '/', Mac needs trailing ':' */
6701 len = strlen (MacPathname);
6702 if (MacPathname[len - 1] != ':' && len < MAXPATHLEN)
6703 strcat (MacPathname, ":");
6704
6705 c2pstr (MacPathname);
6706 cipb.hFileInfo.ioNamePtr = MacPathname; /* using full pathname so vRefNum and dirID ignored */
6707 cipb.hFileInfo.ioVRefNum = 0;
6708 cipb.hFileInfo.ioDirID = 0;
6709 cipb.hFileInfo.ioFDirIndex = 0; /* set to 0 to get information about specific dir or file */
6710
6711 errno = PBGetCatInfo (&cipb, false);
6712 if (errno != noErr) {
6713 errno = ENOENT;
6714 return 0;
6715 }
6716
6717 if (!(cipb.hFileInfo.ioFlAttrib & 0x10)) /* bit 4 = 1 for directories */
6718 return 0; /* not a directory */
6719
6720 dirp->dir_id = cipb.dirInfo.ioDrDirID; /* used later in readdir */
6721 dirp->getting_volumes = 0;
6722 dirp->current_index = 1; /* index for first file/directory */
6723
6724 return dirp;
6725 }
6726
6727 int
6728 closedir (DIR *dp)
6729 {
6730 free (dp);
6731
6732 return 0;
6733 }
6734
6735 struct dirent *
6736 readdir (DIR *dp)
6737 {
6738 HParamBlockRec HPBlock;
6739 CInfoPBRec cipb;
6740 static struct dirent s_dirent;
6741 static Str255 s_name;
6742 int done;
6743
6744 /* Handle the root directory containing the mounted volumes. Call
6745 PBHGetVInfo specifying an index to obtain the info for a volume.
6746 PBHGetVInfo returns an error when it receives an index beyond the
6747 last volume, at which time we should return a nil dirent struct
6748 pointer. */
6749 if (dp->getting_volumes) {
6750 HPBlock.volumeParam.ioNamePtr = s_name;
6751 HPBlock.volumeParam.ioVRefNum = 0;
6752 HPBlock.volumeParam.ioVolIndex = dp->current_index;
6753
6754 errno = PBHGetVInfo (&HPBlock, false);
6755 if (errno != noErr) {
6756 errno = ENOENT;
6757 return 0;
6758 }
6759
6760 p2cstr (s_name);
6761 strcat (s_name, "/"); /* need "/" for stat to work correctly */
6762
6763 dp->current_index++;
6764
6765 s_dirent.d_ino = cipb.dirInfo.ioDrDirID;
6766 s_dirent.d_name = s_name;
6767
6768 return &s_dirent;
6769 }
6770 else {
6771 cipb.hFileInfo.ioVRefNum = 0;
6772 cipb.hFileInfo.ioNamePtr = s_name; /* location to receive filename returned */
6773
6774 /* return only visible files */
6775 done = false;
6776 while (!done) {
6777 cipb.hFileInfo.ioDirID = dp->dir_id; /* directory ID found by opendir */
6778 cipb.hFileInfo.ioFDirIndex = dp->current_index;
6779
6780 errno = PBGetCatInfo (&cipb, false);
6781 if (errno != noErr) {
6782 errno = ENOENT;
6783 return 0;
6784 }
6785
6786 /* insist on an visibile entry */
6787 if (cipb.hFileInfo.ioFlAttrib & 0x10) /* directory? */
6788 done = !(cipb.dirInfo.ioDrUsrWds.frFlags & fInvisible);
6789 else
6790 done = !(cipb.hFileInfo.ioFlFndrInfo.fdFlags & fInvisible);
6791
6792 dp->current_index++;
6793 }
6794
6795 p2cstr (s_name);
6796
6797 s_dirent.d_ino = cipb.dirInfo.ioDrDirID; /* value unimportant: non-zero for valid file */
6798 s_dirent.d_name = s_name;
6799
6800 return &s_dirent;
6801 }
6802 }
6803
6804 char *
6805 getwd (char *path)
6806 {
6807 char MacPathname[MAXPATHLEN+1];
6808 Str255 directoryName;
6809 OSErr errno;
6810 CInfoPBRec cipb;
6811
6812 MacPathname[0] = '\0';
6813 directoryName[0] = '\0';
6814 cipb.dirInfo.ioDrParID = 0;
6815 cipb.dirInfo.ioNamePtr = directoryName; /* empty string = default directory */
6816
6817 do {
6818 cipb.dirInfo.ioVRefNum = 0;
6819 cipb.dirInfo.ioFDirIndex = -1;
6820 cipb.dirInfo.ioDrDirID = cipb.dirInfo.ioDrParID; /* go up to parent each time */
6821
6822 errno = PBGetCatInfo (&cipb, false);
6823 if (errno != noErr) {
6824 errno = ENOENT;
6825 return 0;
6826 }
6827
6828 p2cstr (directoryName);
6829 strcat (directoryName, ":");
6830 strcat (directoryName, MacPathname); /* attach to front since going up directory tree */
6831 strcpy (MacPathname, directoryName);
6832 } while (cipb.dirInfo.ioDrDirID != fsRtDirID); /* until volume's root directory */
6833
6834 if (Mac2UnixPathname (MacPathname, path, MAXPATHLEN+1) == 0)
6835 return 0;
6836 else
6837 return path;
6838 }
6839
6840 #endif /* macintosh */
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