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[bpt/emacs.git] / src / sysdep.c
1 /* Interfaces to system-dependent kernel and library entries.
2 Copyright (C) 1985, 86, 87, 88, 93, 94 Free Software Foundation, Inc.
3
4 This file is part of GNU Emacs.
5
6 GNU Emacs is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
9 any later version.
10
11 GNU Emacs is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with GNU Emacs; see the file COPYING. If not, write to
18 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
19
20
21 #include <signal.h>
22 #include <setjmp.h>
23
24 #include <config.h>
25 #include "lisp.h"
26 #include "blockinput.h"
27 #undef NULL
28
29 #define min(x,y) ((x) > (y) ? (y) : (x))
30
31 /* In this file, open, read and write refer to the system calls,
32 not our sugared interfaces sys_open, sys_read and sys_write.
33 Contrariwise, for systems where we use the system calls directly,
34 define sys_read, etc. here as aliases for them. */
35 #ifndef read
36 #define sys_read read
37 #define sys_write write
38 #endif /* `read' is not a macro */
39
40 #undef read
41 #undef write
42
43 #ifdef WINDOWSNT
44 #define read _read
45 #define write _write
46 #include <windows.h>
47 extern int errno;
48 #endif /* not WINDOWSNT */
49
50 #ifndef close
51 #define sys_close close
52 #else
53 #undef close
54 #endif
55
56 #ifndef open
57 #define sys_open open
58 #else /* `open' is a macro */
59 #undef open
60 #endif /* `open' is a macro */
61
62 /* Does anyone other than VMS need this? */
63 #ifndef fwrite
64 #define sys_fwrite fwrite
65 #else
66 #undef fwrite
67 #endif
68
69 #ifndef HAVE_H_ERRNO
70 extern int h_errno;
71 #endif
72
73 #include <stdio.h>
74 #include <sys/types.h>
75 #include <sys/stat.h>
76 #include <errno.h>
77
78 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida, MW Aug 1993 */
79 #include <dos.h>
80 #include "dosfns.h"
81 #include "msdos.h"
82 #include <sys/param.h>
83 #endif
84
85 extern int errno;
86
87 #ifdef VMS
88 #include <rms.h>
89 #include <ttdef.h>
90 #include <tt2def.h>
91 #include <iodef.h>
92 #include <ssdef.h>
93 #include <descrip.h>
94 #include <fibdef.h>
95 #include <atrdef.h>
96 #include <ctype.h>
97 #include <string.h>
98 #ifdef __GNUC__
99 #include <sys/file.h>
100 #else
101 #include <file.h>
102 #endif
103 #undef F_SETFL
104 #ifndef RAB$C_BID
105 #include <rab.h>
106 #endif
107 #define MAXIOSIZE (32 * PAGESIZE) /* Don't I/O more than 32 blocks at a time */
108 #endif /* VMS */
109
110 #ifndef BSD4_1
111 #ifdef BSD /* this is done this way to avoid defined (BSD) || defined (USG)
112 because the vms compiler doesn't grok `defined' */
113 #include <fcntl.h>
114 #endif
115 #ifdef USG
116 #ifndef USG5
117 #include <fcntl.h>
118 #endif
119 #endif
120 #endif /* not 4.1 bsd */
121
122 #ifndef MSDOS
123 #include <sys/ioctl.h>
124 #endif
125 #include "systty.h"
126 #include "syswait.h"
127
128 #ifdef BROKEN_TIOCGWINSZ
129 #undef TIOCGWINSZ
130 #undef TIOCSWINSZ
131 #endif
132
133 #ifdef USG
134 #include <sys/utsname.h>
135 #include <string.h>
136 #ifndef MEMORY_IN_STRING_H
137 #include <memory.h>
138 #endif
139 #if defined (TIOCGWINSZ) || defined (ISC4_0)
140 #ifdef NEED_SIOCTL
141 #include <sys/sioctl.h>
142 #endif
143 #ifdef NEED_PTEM_H
144 #include <sys/stream.h>
145 #include <sys/ptem.h>
146 #endif
147 #endif /* TIOCGWINSZ or ISC4_0 */
148 #endif /* USG */
149
150 extern int quit_char;
151
152 #include "frame.h"
153 #include "window.h"
154 #include "termhooks.h"
155 #include "termchar.h"
156 #include "termopts.h"
157 #include "dispextern.h"
158 #include "process.h"
159
160 #ifdef WINDOWSNT
161 #include <direct.h>
162 /* In process.h which conflicts with the local copy. */
163 #define _P_WAIT 0
164 int _CRTAPI1 _spawnlp (int, const char *, const char *, ...);
165 int _CRTAPI1 _getpid (void);
166 #endif
167
168 #ifdef NONSYSTEM_DIR_LIBRARY
169 #include "ndir.h"
170 #endif /* NONSYSTEM_DIR_LIBRARY */
171
172 #include "syssignal.h"
173 #include "systime.h"
174 #ifdef HAVE_UTIME_H
175 #include <utime.h>
176 #endif
177
178 #ifndef HAVE_UTIMES
179 #ifndef HAVE_STRUCT_UTIMBUF
180 /* We want to use utime rather than utimes, but we couldn't find the
181 structure declaration. We'll use the traditional one. */
182 struct utimbuf {
183 long actime;
184 long modtime;
185 };
186 #endif
187 #endif
188
189 /* LPASS8 is new in 4.3, and makes cbreak mode provide all 8 bits. */
190 #ifndef LPASS8
191 #define LPASS8 0
192 #endif
193
194 #ifdef BSD4_1
195 #define LNOFLSH 0100000
196 #endif
197
198 static int baud_convert[] =
199 #ifdef BAUD_CONVERT
200 BAUD_CONVERT;
201 #else
202 {
203 0, 50, 75, 110, 135, 150, 200, 300, 600, 1200,
204 1800, 2400, 4800, 9600, 19200, 38400
205 };
206 #endif
207
208 extern short ospeed;
209
210 /* The file descriptor for Emacs's input terminal.
211 Under Unix, this is normally zero except when using X;
212 under VMS, we place the input channel number here. */
213 int input_fd;
214 \f
215 /* Specify a different file descriptor for further input operations. */
216
217 void
218 change_input_fd (fd)
219 int fd;
220 {
221 input_fd = fd;
222 }
223
224 /* Discard pending input on descriptor input_fd. */
225
226 discard_tty_input ()
227 {
228 #ifndef WINDOWSNT
229 struct emacs_tty buf;
230
231 if (noninteractive)
232 return;
233
234 /* Discarding input is not safe when the input could contain
235 replies from the X server. So don't do it. */
236 if (read_socket_hook)
237 return;
238
239 #ifdef VMS
240 end_kbd_input ();
241 SYS$QIOW (0, input_fd, IO$_READVBLK|IO$M_PURGE, input_iosb, 0, 0,
242 &buf.main, 0, 0, terminator_mask, 0, 0);
243 queue_kbd_input ();
244 #else /* not VMS */
245 #ifdef APOLLO
246 {
247 int zero = 0;
248 ioctl (input_fd, TIOCFLUSH, &zero);
249 }
250 #else /* not Apollo */
251 #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */
252 while (dos_keyread () != -1)
253 ;
254 #else /* not MSDOS */
255 EMACS_GET_TTY (input_fd, &buf);
256 EMACS_SET_TTY (input_fd, &buf, 0);
257 #endif /* not MSDOS */
258 #endif /* not Apollo */
259 #endif /* not VMS */
260 #endif /* not WINDOWSNT */
261 }
262
263 #ifdef SIGTSTP
264
265 /* Arrange for character C to be read as the next input from
266 the terminal. */
267
268 stuff_char (c)
269 char c;
270 {
271 if (read_socket_hook)
272 return;
273
274 /* Should perhaps error if in batch mode */
275 #ifdef TIOCSTI
276 ioctl (input_fd, TIOCSTI, &c);
277 #else /* no TIOCSTI */
278 error ("Cannot stuff terminal input characters in this version of Unix");
279 #endif /* no TIOCSTI */
280 }
281
282 #endif /* SIGTSTP */
283 \f
284 init_baud_rate ()
285 {
286 if (noninteractive)
287 ospeed = 0;
288 else
289 {
290 #ifdef DOS_NT
291 ospeed = 15;
292 #else /* not DOS_NT */
293 #ifdef VMS
294 struct sensemode sg;
295
296 SYS$QIOW (0, input_fd, IO$_SENSEMODE, &sg, 0, 0,
297 &sg.class, 12, 0, 0, 0, 0 );
298 ospeed = sg.xmit_baud;
299 #else /* not VMS */
300 #ifdef HAVE_TERMIOS
301 struct termios sg;
302
303 sg.c_cflag = B9600;
304 tcgetattr (input_fd, &sg);
305 ospeed = cfgetospeed (&sg);
306 #if defined (USE_GETOBAUD) && defined (getobaud)
307 /* m88k-motorola-sysv3 needs this (ghazi@noc.rutgers.edu) 9/1/94. */
308 if (ospeed == 0)
309 ospeed = getobaud (sg.c_cflag);
310 #endif
311 #else /* neither VMS nor TERMIOS */
312 #ifdef HAVE_TERMIO
313 struct termio sg;
314
315 sg.c_cflag = B9600;
316 #ifdef HAVE_TCATTR
317 tcgetattr (input_fd, &sg);
318 #else
319 ioctl (input_fd, TCGETA, &sg);
320 #endif
321 ospeed = sg.c_cflag & CBAUD;
322 #else /* neither VMS nor TERMIOS nor TERMIO */
323 struct sgttyb sg;
324
325 sg.sg_ospeed = B9600;
326 if (ioctl (input_fd, TIOCGETP, &sg) < 0)
327 abort ();
328 ospeed = sg.sg_ospeed;
329 #endif /* not HAVE_TERMIO */
330 #endif /* not HAVE_TERMIOS */
331 #endif /* not VMS */
332 #endif /* not DOS_NT */
333 }
334
335 baud_rate = (ospeed < sizeof baud_convert / sizeof baud_convert[0]
336 ? baud_convert[ospeed] : 9600);
337 if (baud_rate == 0)
338 baud_rate = 1200;
339 }
340
341 /*ARGSUSED*/
342 set_exclusive_use (fd)
343 int fd;
344 {
345 #ifdef FIOCLEX
346 ioctl (fd, FIOCLEX, 0);
347 #endif
348 /* Ok to do nothing if this feature does not exist */
349 }
350 \f
351 #ifndef subprocesses
352
353 wait_without_blocking ()
354 {
355 #ifdef BSD
356 wait3 (0, WNOHANG | WUNTRACED, 0);
357 #else
358 croak ("wait_without_blocking");
359 #endif
360 synch_process_alive = 0;
361 }
362
363 #endif /* not subprocesses */
364
365 int wait_debugging; /* Set nonzero to make following function work under dbx
366 (at least for bsd). */
367
368 SIGTYPE
369 wait_for_termination_signal ()
370 {}
371
372 /* Wait for subprocess with process id `pid' to terminate and
373 make sure it will get eliminated (not remain forever as a zombie) */
374
375 wait_for_termination (pid)
376 int pid;
377 {
378 while (1)
379 {
380 #ifdef subprocesses
381 #ifdef VMS
382 int status;
383
384 status = SYS$FORCEX (&pid, 0, 0);
385 break;
386 #else /* not VMS */
387 #if defined (BSD) || (defined (HPUX) && !defined (HPUX_5))
388 /* Note that kill returns -1 even if the process is just a zombie now.
389 But inevitably a SIGCHLD interrupt should be generated
390 and child_sig will do wait3 and make the process go away. */
391 /* There is some indication that there is a bug involved with
392 termination of subprocesses, perhaps involving a kernel bug too,
393 but no idea what it is. Just as a hunch we signal SIGCHLD to see
394 if that causes the problem to go away or get worse. */
395 sigsetmask (sigmask (SIGCHLD));
396 if (0 > kill (pid, 0))
397 {
398 sigsetmask (SIGEMPTYMASK);
399 kill (getpid (), SIGCHLD);
400 break;
401 }
402 if (wait_debugging)
403 sleep (1);
404 else
405 sigpause (SIGEMPTYMASK);
406 #else /* not BSD, and not HPUX version >= 6 */
407 #if defined (UNIPLUS)
408 if (0 > kill (pid, 0))
409 break;
410 wait (0);
411 #else /* neither BSD nor UNIPLUS: random sysV */
412 #ifdef POSIX_SIGNALS /* would this work for LINUX as well? */
413 sigblock (sigmask (SIGCHLD));
414 if (0 > kill (pid, 0))
415 {
416 sigunblock (sigmask (SIGCHLD));
417 break;
418 }
419 sigpause (SIGEMPTYMASK);
420 #else /* not POSIX_SIGNALS */
421 #ifdef HAVE_SYSV_SIGPAUSE
422 sighold (SIGCHLD);
423 if (0 > kill (pid, 0))
424 {
425 sigrelse (SIGCHLD);
426 break;
427 }
428 sigpause (SIGCHLD);
429 #else /* not HAVE_SYSV_SIGPAUSE */
430 #ifdef WINDOWSNT
431 wait (0);
432 break;
433 #else /* not WINDOWSNT */
434 if (0 > kill (pid, 0))
435 break;
436 /* Using sleep instead of pause avoids timing error.
437 If the inferior dies just before the sleep,
438 we lose just one second. */
439 sleep (1);
440 #endif /* not WINDOWSNT */
441 #endif /* not HAVE_SYSV_SIGPAUSE */
442 #endif /* not POSIX_SIGNALS */
443 #endif /* not UNIPLUS */
444 #endif /* not BSD, and not HPUX version >= 6 */
445 #endif /* not VMS */
446 #else /* not subprocesses */
447 #ifndef BSD4_1
448 if (kill (pid, 0) < 0)
449 break;
450 wait (0);
451 #else /* BSD4_1 */
452 int status;
453 status = wait (0);
454 if (status == pid || status == -1)
455 break;
456 #endif /* BSD4_1 */
457 #endif /* not subprocesses */
458 }
459 }
460
461 #ifdef subprocesses
462
463 /*
464 * flush any pending output
465 * (may flush input as well; it does not matter the way we use it)
466 */
467
468 flush_pending_output (channel)
469 int channel;
470 {
471 #ifdef HAVE_TERMIOS
472 /* If we try this, we get hit with SIGTTIN, because
473 the child's tty belongs to the child's pgrp. */
474 #else
475 #ifdef TCFLSH
476 ioctl (channel, TCFLSH, 1);
477 #else
478 #ifdef TIOCFLUSH
479 int zero = 0;
480 /* 3rd arg should be ignored
481 but some 4.2 kernels actually want the address of an int
482 and nonzero means something different. */
483 ioctl (channel, TIOCFLUSH, &zero);
484 #endif
485 #endif
486 #endif
487 }
488 \f
489 #ifndef VMS
490 /* Set up the terminal at the other end of a pseudo-terminal that
491 we will be controlling an inferior through.
492 It should not echo or do line-editing, since that is done
493 in Emacs. No padding needed for insertion into an Emacs buffer. */
494
495 child_setup_tty (out)
496 int out;
497 {
498 #ifndef DOS_NT
499 struct emacs_tty s;
500
501 EMACS_GET_TTY (out, &s);
502
503 #if defined (HAVE_TERMIO) || defined (HAVE_TERMIOS)
504 s.main.c_oflag |= OPOST; /* Enable output postprocessing */
505 s.main.c_oflag &= ~ONLCR; /* Disable map of NL to CR-NL on output */
506 #ifdef NLDLY
507 s.main.c_oflag &= ~(NLDLY|CRDLY|TABDLY|BSDLY|VTDLY|FFDLY);
508 /* No output delays */
509 #endif
510 s.main.c_lflag &= ~ECHO; /* Disable echo */
511 s.main.c_lflag |= ISIG; /* Enable signals */
512 #ifdef IUCLC
513 s.main.c_iflag &= ~IUCLC; /* Disable downcasing on input. */
514 #endif
515 #ifdef OLCUC
516 s.main.c_oflag &= ~OLCUC; /* Disable upcasing on output. */
517 #endif
518 s.main.c_cflag = (s.main.c_cflag & ~CSIZE) | CS8; /* Don't strip 8th bit */
519 #if 0
520 /* Said to be unnecessary: */
521 s.main.c_cc[VMIN] = 1; /* minimum number of characters to accept */
522 s.main.c_cc[VTIME] = 0; /* wait forever for at least 1 character */
523 #endif
524
525 s.main.c_lflag |= ICANON; /* Enable erase/kill and eof processing */
526 s.main.c_cc[VEOF] = 04; /* insure that EOF is Control-D */
527 s.main.c_cc[VERASE] = CDISABLE; /* disable erase processing */
528 s.main.c_cc[VKILL] = CDISABLE; /* disable kill processing */
529
530 #ifdef HPUX
531 s.main.c_cflag = (s.main.c_cflag & ~CBAUD) | B9600; /* baud rate sanity */
532 #endif /* HPUX */
533
534 #ifdef AIX
535 /* AIX enhanced edit loses NULs, so disable it */
536 #ifndef IBMR2AIX
537 s.main.c_line = 0;
538 s.main.c_iflag &= ~ASCEDIT;
539 #endif
540 /* Also, PTY overloads NUL and BREAK.
541 don't ignore break, but don't signal either, so it looks like NUL. */
542 s.main.c_iflag &= ~IGNBRK;
543 s.main.c_iflag &= ~BRKINT;
544 /* QUIT and INTR work better as signals, so disable character forms */
545 s.main.c_cc[VINTR] = 0377;
546 #ifdef SIGNALS_VIA_CHARACTERS
547 /* the QUIT and INTR character are used in process_send_signal
548 so set them here to something useful. */
549 if (s.main.c_cc[VQUIT] == 0377)
550 s.main.c_cc[VQUIT] = '\\'&037; /* Control-\ */
551 if (s.main.c_cc[VINTR] == 0377)
552 s.main.c_cc[VINTR] = 'C'&037; /* Control-C */
553 #else /* no TIOCGPGRP or no TIOCGLTC or no TIOCGETC */
554 /* QUIT and INTR work better as signals, so disable character forms */
555 s.main.c_cc[VQUIT] = 0377;
556 s.main.c_cc[VINTR] = 0377;
557 s.main.c_lflag &= ~ISIG;
558 #endif /* no TIOCGPGRP or no TIOCGLTC or no TIOCGETC */
559 s.main.c_cc[VEOL] = 0377;
560 s.main.c_cflag = (s.main.c_cflag & ~CBAUD) | B9600; /* baud rate sanity */
561 #endif /* AIX */
562
563 #else /* not HAVE_TERMIO */
564
565 s.main.sg_flags &= ~(ECHO | CRMOD | ANYP | ALLDELAY | RAW | LCASE
566 | CBREAK | TANDEM);
567 s.main.sg_flags |= LPASS8;
568 s.main.sg_erase = 0377;
569 s.main.sg_kill = 0377;
570 s.lmode = LLITOUT | s.lmode; /* Don't strip 8th bit */
571
572 #endif /* not HAVE_TERMIO */
573
574 EMACS_SET_TTY (out, &s, 0);
575
576 #ifdef BSD4_1
577 if (interrupt_input)
578 reset_sigio ();
579 #endif /* BSD4_1 */
580 #ifdef RTU
581 {
582 int zero = 0;
583 ioctl (out, FIOASYNC, &zero);
584 }
585 #endif /* RTU */
586 #endif /* not DOS_NT */
587 }
588 #endif /* not VMS */
589
590 #endif /* subprocesses */
591 \f
592 /* Record a signal code and the handler for it. */
593 struct save_signal
594 {
595 int code;
596 SIGTYPE (*handler) ();
597 };
598
599 /* Suspend the Emacs process; give terminal to its superior. */
600
601 sys_suspend ()
602 {
603 #ifdef VMS
604 /* "Foster" parentage allows emacs to return to a subprocess that attached
605 to the current emacs as a cheaper than starting a whole new process. This
606 is set up by KEPTEDITOR.COM. */
607 unsigned long parent_id, foster_parent_id;
608 char *fpid_string;
609
610 fpid_string = getenv ("EMACS_PARENT_PID");
611 if (fpid_string != NULL)
612 {
613 sscanf (fpid_string, "%x", &foster_parent_id);
614 if (foster_parent_id != 0)
615 parent_id = foster_parent_id;
616 else
617 parent_id = getppid ();
618 }
619 else
620 parent_id = getppid ();
621
622 xfree (fpid_string); /* On VMS, this was malloc'd */
623
624 if (parent_id && parent_id != 0xffffffff)
625 {
626 SIGTYPE (*oldsig)() = (int) signal (SIGINT, SIG_IGN);
627 int status = LIB$ATTACH (&parent_id) & 1;
628 signal (SIGINT, oldsig);
629 return status;
630 }
631 else
632 {
633 struct {
634 int l;
635 char *a;
636 } d_prompt;
637 d_prompt.l = sizeof ("Emacs: "); /* Our special prompt */
638 d_prompt.a = "Emacs: "; /* Just a reminder */
639 LIB$SPAWN (0, 0, 0, 0, 0, 0, 0, 0, 0, 0, &d_prompt, 0);
640 return 1;
641 }
642 return -1;
643 #else
644 #if defined(SIGTSTP) && !defined(MSDOS)
645
646 {
647 int pgrp = EMACS_GETPGRP (0);
648 EMACS_KILLPG (pgrp, SIGTSTP);
649 }
650
651 #else /* No SIGTSTP */
652 #ifdef USG_JOBCTRL /* If you don't know what this is don't mess with it */
653 ptrace (0, 0, 0, 0); /* set for ptrace - caught by csh */
654 kill (getpid (), SIGQUIT);
655
656 #else /* No SIGTSTP or USG_JOBCTRL */
657
658 /* On a system where suspending is not implemented,
659 instead fork a subshell and let it talk directly to the terminal
660 while we wait. */
661 sys_subshell ();
662
663 #endif /* no USG_JOBCTRL */
664 #endif /* no SIGTSTP */
665 #endif /* not VMS */
666 }
667
668 /* Fork a subshell. */
669
670 sys_subshell ()
671 {
672 #ifndef VMS
673 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */
674 int st;
675 char oldwd[MAXPATHLEN+1]; /* Fixed length is safe on MSDOS. */
676 #endif
677 int pid;
678 struct save_signal saved_handlers[5];
679 Lisp_Object dir;
680 unsigned char *str = 0;
681 int len;
682
683 saved_handlers[0].code = SIGINT;
684 saved_handlers[1].code = SIGQUIT;
685 saved_handlers[2].code = SIGTERM;
686 #ifdef SIGIO
687 saved_handlers[3].code = SIGIO;
688 saved_handlers[4].code = 0;
689 #else
690 saved_handlers[3].code = 0;
691 #endif
692
693 /* Mentioning current_buffer->buffer would mean including buffer.h,
694 which somehow wedges the hp compiler. So instead... */
695
696 dir = intern ("default-directory");
697 if (NILP (Fboundp (dir)))
698 goto xyzzy;
699 dir = Fsymbol_value (dir);
700 if (!STRINGP (dir))
701 goto xyzzy;
702
703 dir = expand_and_dir_to_file (Funhandled_file_name_directory (dir), Qnil);
704 str = (unsigned char *) alloca (XSTRING (dir)->size + 2);
705 len = XSTRING (dir)->size;
706 bcopy (XSTRING (dir)->data, str, len);
707 if (str[len - 1] != '/') str[len++] = '/';
708 str[len] = 0;
709 xyzzy:
710
711 #ifdef WINDOWSNT
712 pid = -1;
713 #else /* not WINDOWSNT */
714 pid = vfork ();
715
716 if (pid == -1)
717 error ("Can't spawn subshell");
718 if (pid == 0)
719 #endif /* not WINDOWSNT */
720 {
721 char *sh;
722
723 #ifdef MSDOS /* MW, Aug 1993 */
724 getwd (oldwd);
725 #endif
726 sh = (char *) egetenv ("SHELL");
727 if (sh == 0)
728 sh = "sh";
729
730 /* Use our buffer's default directory for the subshell. */
731 if (str)
732 chdir (str);
733
734 #ifdef subprocesses
735 close_process_descs (); /* Close Emacs's pipes/ptys */
736 #endif
737
738 #ifdef SET_EMACS_PRIORITY
739 {
740 extern int emacs_priority;
741
742 if (emacs_priority < 0)
743 nice (-emacs_priority);
744 }
745 #endif
746
747 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */
748 st = system (sh);
749 chdir (oldwd);
750 if (st)
751 report_file_error ("Can't execute subshell", Fcons (build_string (sh), Qnil));
752 #else /* not MSDOS */
753 #ifdef WINDOWSNT
754 restore_console ();
755
756 /* Waits for process completion */
757 pid = _spawnlp (_P_WAIT, sh, sh, NULL);
758 if (pid == -1)
759 write (1, "Can't execute subshell", 22);
760
761 take_console ();
762 #else /* not WINDOWSNT */
763 execlp (sh, sh, 0);
764 write (1, "Can't execute subshell", 22);
765 _exit (1);
766 #endif /* not WINDOWSNT */
767 #endif /* not MSDOS */
768 }
769
770 save_signal_handlers (saved_handlers);
771 synch_process_alive = 1;
772 wait_for_termination (pid);
773 restore_signal_handlers (saved_handlers);
774 #endif /* !VMS */
775 }
776
777 save_signal_handlers (saved_handlers)
778 struct save_signal *saved_handlers;
779 {
780 while (saved_handlers->code)
781 {
782 saved_handlers->handler
783 = (SIGTYPE (*) ()) signal (saved_handlers->code, SIG_IGN);
784 saved_handlers++;
785 }
786 }
787
788 restore_signal_handlers (saved_handlers)
789 struct save_signal *saved_handlers;
790 {
791 while (saved_handlers->code)
792 {
793 signal (saved_handlers->code, saved_handlers->handler);
794 saved_handlers++;
795 }
796 }
797 \f
798 #ifdef F_SETFL
799
800 int old_fcntl_flags;
801
802 init_sigio (fd)
803 int fd;
804 {
805 #ifdef FASYNC
806 old_fcntl_flags = fcntl (fd, F_GETFL, 0) & ~FASYNC;
807 fcntl (fd, F_SETFL, old_fcntl_flags | FASYNC);
808 #endif
809 interrupts_deferred = 0;
810 }
811
812 reset_sigio ()
813 {
814 unrequest_sigio ();
815 }
816
817 #ifdef FASYNC /* F_SETFL does not imply existence of FASYNC */
818
819 request_sigio ()
820 {
821 if (read_socket_hook)
822 return;
823
824 #ifdef SIGWINCH
825 sigunblock (sigmask (SIGWINCH));
826 #endif
827 fcntl (input_fd, F_SETFL, old_fcntl_flags | FASYNC);
828
829 interrupts_deferred = 0;
830 }
831
832 unrequest_sigio ()
833 {
834 if (read_socket_hook)
835 return;
836
837 #ifdef SIGWINCH
838 sigblock (sigmask (SIGWINCH));
839 #endif
840 fcntl (input_fd, F_SETFL, old_fcntl_flags);
841 interrupts_deferred = 1;
842 }
843
844 #else /* no FASYNC */
845 #ifdef STRIDE /* Stride doesn't have FASYNC - use FIOASYNC */
846
847 request_sigio ()
848 {
849 int on = 1;
850
851 if (read_socket_hook)
852 return;
853
854 ioctl (input_fd, FIOASYNC, &on);
855 interrupts_deferred = 0;
856 }
857
858 unrequest_sigio ()
859 {
860 int off = 0;
861
862 if (read_socket_hook)
863 return;
864
865 ioctl (input_fd, FIOASYNC, &off);
866 interrupts_deferred = 1;
867 }
868
869 #else /* not FASYNC, not STRIDE */
870
871 #ifdef _CX_UX
872
873 #include <termios.h>
874
875 request_sigio ()
876 {
877 int on = 1;
878 sigset_t st;
879
880 if (read_socket_hook)
881 return;
882
883 sigemptyset(&st);
884 sigaddset(&st, SIGIO);
885 ioctl (input_fd, FIOASYNC, &on);
886 interrupts_deferred = 0;
887 sigprocmask(SIG_UNBLOCK, &st, (sigset_t *)0);
888 }
889
890 unrequest_sigio ()
891 {
892 int off = 0;
893
894 if (read_socket_hook)
895 return;
896
897 ioctl (input_fd, FIOASYNC, &off);
898 interrupts_deferred = 1;
899 }
900
901 #else /* ! _CX_UX */
902
903 request_sigio ()
904 {
905 if (read_socket_hook)
906 return;
907
908 croak ("request_sigio");
909 }
910
911 unrequest_sigio ()
912 {
913 if (read_socket_hook)
914 return;
915
916 croak ("unrequest_sigio");
917 }
918
919 #endif /* _CX_UX */
920 #endif /* STRIDE */
921 #endif /* FASYNC */
922 #endif /* F_SETFL */
923 \f
924 /* Saving and restoring the process group of Emacs's terminal. */
925
926 #ifdef BSD_PGRPS
927
928 /* The process group of which Emacs was a member when it initially
929 started.
930
931 If Emacs was in its own process group (i.e. inherited_pgroup ==
932 getpid ()), then we know we're running under a shell with job
933 control (Emacs would never be run as part of a pipeline).
934 Everything is fine.
935
936 If Emacs was not in its own process group, then we know we're
937 running under a shell (or a caller) that doesn't know how to
938 separate itself from Emacs (like sh). Emacs must be in its own
939 process group in order to receive SIGIO correctly. In this
940 situation, we put ourselves in our own pgroup, forcibly set the
941 tty's pgroup to our pgroup, and make sure to restore and reinstate
942 the tty's pgroup just like any other terminal setting. If
943 inherited_group was not the tty's pgroup, then we'll get a
944 SIGTTmumble when we try to change the tty's pgroup, and a CONT if
945 it goes foreground in the future, which is what should happen. */
946 int inherited_pgroup;
947
948 /* Split off the foreground process group to Emacs alone.
949 When we are in the foreground, but not started in our own process
950 group, redirect the TTY to point to our own process group. We need
951 to be in our own process group to receive SIGIO properly. */
952 narrow_foreground_group ()
953 {
954 int me = getpid ();
955
956 setpgrp (0, inherited_pgroup);
957 if (inherited_pgroup != me)
958 EMACS_SET_TTY_PGRP (input_fd, &me);
959 setpgrp (0, me);
960 }
961
962 /* Set the tty to our original foreground group. */
963 widen_foreground_group ()
964 {
965 if (inherited_pgroup != getpid ())
966 EMACS_SET_TTY_PGRP (input_fd, &inherited_pgroup);
967 setpgrp (0, inherited_pgroup);
968 }
969
970 #endif /* BSD_PGRPS */
971 \f
972 /* Getting and setting emacs_tty structures. */
973
974 /* Set *TC to the parameters associated with the terminal FD.
975 Return zero if all's well, or -1 if we ran into an error we
976 couldn't deal with. */
977 int
978 emacs_get_tty (fd, settings)
979 int fd;
980 struct emacs_tty *settings;
981 {
982 /* Retrieve the primary parameters - baud rate, character size, etcetera. */
983 #ifdef HAVE_TCATTR
984 /* We have those nifty POSIX tcmumbleattr functions. */
985 if (tcgetattr (fd, &settings->main) < 0)
986 return -1;
987
988 #else
989 #ifdef HAVE_TERMIO
990 /* The SYSV-style interface? */
991 if (ioctl (fd, TCGETA, &settings->main) < 0)
992 return -1;
993
994 #else
995 #ifdef VMS
996 /* Vehemently Monstrous System? :-) */
997 if (! (SYS$QIOW (0, fd, IO$_SENSEMODE, settings, 0, 0,
998 &settings->main.class, 12, 0, 0, 0, 0)
999 & 1))
1000 return -1;
1001
1002 #else
1003 #ifndef DOS_NT
1004 /* I give up - I hope you have the BSD ioctls. */
1005 if (ioctl (fd, TIOCGETP, &settings->main) < 0)
1006 return -1;
1007 #endif /* not DOS_NT */
1008 #endif
1009 #endif
1010 #endif
1011
1012 /* Suivant - Do we have to get struct ltchars data? */
1013 #ifdef HAVE_LTCHARS
1014 if (ioctl (fd, TIOCGLTC, &settings->ltchars) < 0)
1015 return -1;
1016 #endif
1017
1018 /* How about a struct tchars and a wordful of lmode bits? */
1019 #ifdef HAVE_TCHARS
1020 if (ioctl (fd, TIOCGETC, &settings->tchars) < 0
1021 || ioctl (fd, TIOCLGET, &settings->lmode) < 0)
1022 return -1;
1023 #endif
1024
1025 /* We have survived the tempest. */
1026 return 0;
1027 }
1028
1029
1030 /* Set the parameters of the tty on FD according to the contents of
1031 *SETTINGS. If WAITP is non-zero, we wait for all queued output to
1032 be written before making the change; otherwise, we forget any
1033 queued input and make the change immediately.
1034 Return 0 if all went well, and -1 if anything failed. */
1035 int
1036 emacs_set_tty (fd, settings, waitp)
1037 int fd;
1038 struct emacs_tty *settings;
1039 int waitp;
1040 {
1041 /* Set the primary parameters - baud rate, character size, etcetera. */
1042 #ifdef HAVE_TCATTR
1043 int i;
1044 /* We have those nifty POSIX tcmumbleattr functions.
1045 William J. Smith <wjs@wiis.wang.com> writes:
1046 "POSIX 1003.1 defines tcsetattr() to return success if it was
1047 able to perform any of the requested actions, even if some
1048 of the requested actions could not be performed.
1049 We must read settings back to ensure tty setup properly.
1050 AIX requires this to keep tty from hanging occasionally." */
1051 /* This make sure that we don't loop indefinitely in here. */
1052 for (i = 0 ; i < 10 ; i++)
1053 if (tcsetattr (fd, waitp ? TCSAFLUSH : TCSADRAIN, &settings->main) < 0)
1054 {
1055 if (errno == EINTR)
1056 continue;
1057 else
1058 return -1;
1059 }
1060 else
1061 {
1062 struct termios new;
1063
1064 /* Get the current settings, and see if they're what we asked for. */
1065 tcgetattr (fd, &new);
1066 /* We cannot use memcmp on the whole structure here because under
1067 * aix386 the termios structure has some reserved field that may
1068 * not be filled in.
1069 */
1070 if ( new.c_iflag == settings->main.c_iflag
1071 && new.c_oflag == settings->main.c_oflag
1072 && new.c_cflag == settings->main.c_cflag
1073 && new.c_lflag == settings->main.c_lflag
1074 && memcmp(new.c_cc, settings->main.c_cc, NCCS) == 0)
1075 break;
1076 else
1077 continue;
1078 }
1079
1080 #else
1081 #ifdef HAVE_TERMIO
1082 /* The SYSV-style interface? */
1083 if (ioctl (fd, waitp ? TCSETAW : TCSETAF, &settings->main) < 0)
1084 return -1;
1085
1086 #else
1087 #ifdef VMS
1088 /* Vehemently Monstrous System? :-) */
1089 if (! (SYS$QIOW (0, fd, IO$_SETMODE, &input_iosb, 0, 0,
1090 &settings->main.class, 12, 0, 0, 0, 0)
1091 & 1))
1092 return -1;
1093
1094 #else
1095 #ifndef DOS_NT
1096 /* I give up - I hope you have the BSD ioctls. */
1097 if (ioctl (fd, (waitp) ? TIOCSETP : TIOCSETN, &settings->main) < 0)
1098 return -1;
1099 #endif /* not DOS_NT */
1100
1101 #endif
1102 #endif
1103 #endif
1104
1105 /* Suivant - Do we have to get struct ltchars data? */
1106 #ifdef HAVE_LTCHARS
1107 if (ioctl (fd, TIOCSLTC, &settings->ltchars) < 0)
1108 return -1;
1109 #endif
1110
1111 /* How about a struct tchars and a wordful of lmode bits? */
1112 #ifdef HAVE_TCHARS
1113 if (ioctl (fd, TIOCSETC, &settings->tchars) < 0
1114 || ioctl (fd, TIOCLSET, &settings->lmode) < 0)
1115 return -1;
1116 #endif
1117
1118 /* We have survived the tempest. */
1119 return 0;
1120 }
1121
1122 \f
1123 /* The initial tty mode bits */
1124 struct emacs_tty old_tty;
1125
1126 int term_initted; /* 1 if outer tty status has been recorded */
1127
1128 #ifdef BSD4_1
1129 /* BSD 4.1 needs to keep track of the lmode bits in order to start
1130 sigio. */
1131 int lmode;
1132 #endif
1133
1134 #ifndef F_SETOWN_BUG
1135 #ifdef F_SETOWN
1136 int old_fcntl_owner;
1137 #endif /* F_SETOWN */
1138 #endif /* F_SETOWN_BUG */
1139
1140 /* This may also be defined in stdio,
1141 but if so, this does no harm,
1142 and using the same name avoids wasting the other one's space. */
1143
1144 #if defined (USG) || defined (DGUX)
1145 unsigned char _sobuf[BUFSIZ+8];
1146 #else
1147 char _sobuf[BUFSIZ];
1148 #endif
1149
1150 #ifdef HAVE_LTCHARS
1151 static struct ltchars new_ltchars = {-1,-1,-1,-1,-1,-1};
1152 #endif
1153 #ifdef HAVE_TCHARS
1154 static struct tchars new_tchars = {-1,-1,-1,-1,-1,-1};
1155 #endif
1156
1157 init_sys_modes ()
1158 {
1159 struct emacs_tty tty;
1160
1161 #ifdef VMS
1162 #if 0
1163 static int oob_chars[2] = {0, 1 << 7}; /* catch C-g's */
1164 extern int (*interrupt_signal) ();
1165 #endif
1166 #endif
1167
1168 if (noninteractive)
1169 return;
1170
1171 #ifdef VMS
1172 if (!input_ef)
1173 input_ef = get_kbd_event_flag ();
1174 /* LIB$GET_EF (&input_ef); */
1175 SYS$CLREF (input_ef);
1176 waiting_for_ast = 0;
1177 if (!timer_ef)
1178 timer_ef = get_timer_event_flag ();
1179 /* LIB$GET_EF (&timer_ef); */
1180 SYS$CLREF (timer_ef);
1181 #if 0
1182 if (!process_ef)
1183 {
1184 LIB$GET_EF (&process_ef);
1185 SYS$CLREF (process_ef);
1186 }
1187 if (input_ef / 32 != process_ef / 32)
1188 croak ("Input and process event flags in different clusters.");
1189 #endif
1190 if (input_ef / 32 != timer_ef / 32)
1191 croak ("Input and timer event flags in different clusters.");
1192 #if 0
1193 input_eflist = ((unsigned) 1 << (input_ef % 32)) |
1194 ((unsigned) 1 << (process_ef % 32));
1195 #endif
1196 timer_eflist = ((unsigned) 1 << (input_ef % 32)) |
1197 ((unsigned) 1 << (timer_ef % 32));
1198 #ifndef VMS4_4
1199 sys_access_reinit ();
1200 #endif
1201 #endif /* not VMS */
1202
1203 #ifdef BSD_PGRPS
1204 if (! read_socket_hook && EQ (Vwindow_system, Qnil))
1205 narrow_foreground_group ();
1206 #endif
1207
1208 #ifdef HAVE_X_WINDOWS
1209 /* Emacs' window system on MSDOG uses the `internal terminal' and therefore
1210 needs the initialization code below. */
1211 if (!read_socket_hook && EQ (Vwindow_system, Qnil))
1212 #endif
1213 {
1214 EMACS_GET_TTY (input_fd, &old_tty);
1215
1216 tty = old_tty;
1217
1218 #if defined (HAVE_TERMIO) || defined (HAVE_TERMIOS)
1219 #ifdef DGUX
1220 /* This allows meta to be sent on 8th bit. */
1221 tty.main.c_iflag &= ~INPCK; /* don't check input for parity */
1222 #endif
1223 tty.main.c_iflag |= (IGNBRK); /* Ignore break condition */
1224 tty.main.c_iflag &= ~ICRNL; /* Disable map of CR to NL on input */
1225 #ifdef ISTRIP
1226 tty.main.c_iflag &= ~ISTRIP; /* don't strip 8th bit on input */
1227 #endif
1228 tty.main.c_lflag &= ~ECHO; /* Disable echo */
1229 tty.main.c_lflag &= ~ICANON; /* Disable erase/kill processing */
1230 #ifdef IEXTEN
1231 tty.main.c_lflag &= ~IEXTEN; /* Disable other editing characters. */
1232 #endif
1233 tty.main.c_lflag |= ISIG; /* Enable signals */
1234 if (flow_control)
1235 {
1236 tty.main.c_iflag |= IXON; /* Enable start/stop output control */
1237 #ifdef IXANY
1238 tty.main.c_iflag &= ~IXANY;
1239 #endif /* IXANY */
1240 }
1241 else
1242 tty.main.c_iflag &= ~IXON; /* Disable start/stop output control */
1243 tty.main.c_oflag &= ~ONLCR; /* Disable map of NL to CR-NL
1244 on output */
1245 tty.main.c_oflag &= ~TAB3; /* Disable tab expansion */
1246 #ifdef CS8
1247 if (meta_key)
1248 {
1249 tty.main.c_cflag |= CS8; /* allow 8th bit on input */
1250 tty.main.c_cflag &= ~PARENB;/* Don't check parity */
1251 }
1252 #endif
1253 tty.main.c_cc[VINTR] = quit_char; /* C-g (usually) gives SIGINT */
1254 /* Set up C-g for both SIGQUIT and SIGINT.
1255 We don't know which we will get, but we handle both alike
1256 so which one it really gives us does not matter. */
1257 tty.main.c_cc[VQUIT] = quit_char;
1258 tty.main.c_cc[VMIN] = 1; /* Input should wait for at least 1 char */
1259 tty.main.c_cc[VTIME] = 0; /* no matter how long that takes. */
1260 #ifdef VSWTCH
1261 tty.main.c_cc[VSWTCH] = CDISABLE; /* Turn off shell layering use
1262 of C-z */
1263 #endif /* VSWTCH */
1264 #if defined (mips) || defined (HAVE_TCATTR)
1265 #ifdef VSUSP
1266 tty.main.c_cc[VSUSP] = CDISABLE; /* Turn off mips handling of C-z. */
1267 #endif /* VSUSP */
1268 #ifdef V_DSUSP
1269 tty.main.c_cc[V_DSUSP] = CDISABLE; /* Turn off mips handling of C-y. */
1270 #endif /* V_DSUSP */
1271 #ifdef VDSUSP /* Some systems have VDSUSP, some have V_DSUSP. */
1272 tty.main.c_cc[VDSUSP] = CDISABLE;
1273 #endif /* VDSUSP */
1274 #ifdef VLNEXT
1275 tty.main.c_cc[VLNEXT] = CDISABLE;
1276 #endif /* VLNEXT */
1277 #ifdef VREPRINT
1278 tty.main.c_cc[VREPRINT] = CDISABLE;
1279 #endif /* VREPRINT */
1280 #ifdef VWERASE
1281 tty.main.c_cc[VWERASE] = CDISABLE;
1282 #endif /* VWERASE */
1283 #ifdef VDISCARD
1284 tty.main.c_cc[VDISCARD] = CDISABLE;
1285 #endif /* VDISCARD */
1286 #ifdef VSTART
1287 tty.main.c_cc[VSTART] = CDISABLE;
1288 #endif /* VSTART */
1289 #ifdef VSTOP
1290 tty.main.c_cc[VSTOP] = CDISABLE;
1291 #endif /* VSTOP */
1292 #endif /* mips or HAVE_TCATTR */
1293 #ifdef SET_LINE_DISCIPLINE
1294 /* Need to explicitely request TERMIODISC line discipline or
1295 Ultrix's termios does not work correctly. */
1296 tty.main.c_line = SET_LINE_DISCIPLINE;
1297 #endif
1298 #ifdef AIX
1299 #ifndef IBMR2AIX
1300 /* AIX enhanced edit loses NULs, so disable it. */
1301 tty.main.c_line = 0;
1302 tty.main.c_iflag &= ~ASCEDIT;
1303 #else
1304 tty.main.c_cc[VSTRT] = 255;
1305 tty.main.c_cc[VSTOP] = 255;
1306 tty.main.c_cc[VSUSP] = 255;
1307 tty.main.c_cc[VDSUSP] = 255;
1308 #endif /* IBMR2AIX */
1309 /* Also, PTY overloads NUL and BREAK.
1310 don't ignore break, but don't signal either, so it looks like NUL.
1311 This really serves a purpose only if running in an XTERM window
1312 or via TELNET or the like, but does no harm elsewhere. */
1313 tty.main.c_iflag &= ~IGNBRK;
1314 tty.main.c_iflag &= ~BRKINT;
1315 #endif
1316 #else /* if not HAVE_TERMIO */
1317 #ifdef VMS
1318 tty.main.tt_char |= TT$M_NOECHO;
1319 if (meta_key)
1320 tty.main.tt_char |= TT$M_EIGHTBIT;
1321 if (flow_control)
1322 tty.main.tt_char |= TT$M_TTSYNC;
1323 else
1324 tty.main.tt_char &= ~TT$M_TTSYNC;
1325 tty.main.tt2_char |= TT2$M_PASTHRU | TT2$M_XON;
1326 #else /* not VMS (BSD, that is) */
1327 #ifndef DOS_NT
1328 tty.main.sg_flags &= ~(ECHO | CRMOD | XTABS);
1329 if (meta_key)
1330 tty.main.sg_flags |= ANYP;
1331 tty.main.sg_flags |= interrupt_input ? RAW : CBREAK;
1332 #endif /* not DOS_NT */
1333 #endif /* not VMS (BSD, that is) */
1334 #endif /* not HAVE_TERMIO */
1335
1336 /* If going to use CBREAK mode, we must request C-g to interrupt
1337 and turn off start and stop chars, etc. If not going to use
1338 CBREAK mode, do this anyway so as to turn off local flow
1339 control for user coming over network on 4.2; in this case,
1340 only t_stopc and t_startc really matter. */
1341 #ifndef HAVE_TERMIO
1342 #ifdef HAVE_TCHARS
1343 /* Note: if not using CBREAK mode, it makes no difference how we
1344 set this */
1345 tty.tchars = new_tchars;
1346 tty.tchars.t_intrc = quit_char;
1347 if (flow_control)
1348 {
1349 tty.tchars.t_startc = '\021';
1350 tty.tchars.t_stopc = '\023';
1351 }
1352
1353 tty.lmode = LDECCTQ | LLITOUT | LPASS8 | LNOFLSH | old_tty.lmode;
1354 #ifdef ultrix
1355 /* Under Ultrix 4.2a, leaving this out doesn't seem to hurt
1356 anything, and leaving it in breaks the meta key. Go figure. */
1357 tty.lmode &= ~LLITOUT;
1358 #endif
1359
1360 #ifdef BSD4_1
1361 lmode = tty.lmode;
1362 #endif
1363
1364 #endif /* HAVE_TCHARS */
1365 #endif /* not HAVE_TERMIO */
1366
1367 #ifdef HAVE_LTCHARS
1368 tty.ltchars = new_ltchars;
1369 #endif /* HAVE_LTCHARS */
1370 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida, MW Aug 1993 */
1371 if (!term_initted)
1372 internal_terminal_init ();
1373 dos_ttraw ();
1374 #endif
1375
1376 EMACS_SET_TTY (input_fd, &tty, 0);
1377
1378 /* This code added to insure that, if flow-control is not to be used,
1379 we have an unlocked terminal at the start. */
1380
1381 #ifdef TCXONC
1382 if (!flow_control) ioctl (input_fd, TCXONC, 1);
1383 #endif
1384 #ifndef APOLLO
1385 #ifdef TIOCSTART
1386 if (!flow_control) ioctl (input_fd, TIOCSTART, 0);
1387 #endif
1388 #endif
1389
1390 #if defined (HAVE_TERMIOS) || defined (HPUX9)
1391 if (!flow_control) tcflow (input_fd, TCOON);
1392 #endif
1393
1394 #ifdef AIXHFT
1395 hft_init ();
1396 #ifdef IBMR2AIX
1397 {
1398 /* IBM's HFT device usually thinks a ^J should be LF/CR. We need it
1399 to be only LF. This is the way that is done. */
1400 struct termio tty;
1401
1402 if (ioctl (1, HFTGETID, &tty) != -1)
1403 write (1, "\033[20l", 5);
1404 }
1405 #endif
1406 #endif /* AIXHFT */
1407
1408 #ifdef VMS
1409 /* Appears to do nothing when in PASTHRU mode.
1410 SYS$QIOW (0, input_fd, IO$_SETMODE|IO$M_OUTBAND, 0, 0, 0,
1411 interrupt_signal, oob_chars, 0, 0, 0, 0);
1412 */
1413 queue_kbd_input (0);
1414 #endif /* VMS */
1415 }
1416
1417 #ifdef F_SETFL
1418 #ifndef F_SETOWN_BUG
1419 #ifdef F_GETOWN /* F_SETFL does not imply existence of F_GETOWN */
1420 if (interrupt_input
1421 && ! read_socket_hook && EQ (Vwindow_system, Qnil))
1422 {
1423 old_fcntl_owner = fcntl (input_fd, F_GETOWN, 0);
1424 fcntl (input_fd, F_SETOWN, getpid ());
1425 init_sigio (input_fd);
1426 }
1427 #endif /* F_GETOWN */
1428 #endif /* F_SETOWN_BUG */
1429 #endif /* F_SETFL */
1430
1431 #ifdef BSD4_1
1432 if (interrupt_input)
1433 init_sigio (input_fd);
1434 #endif
1435
1436 #ifdef VMS /* VMS sometimes has this symbol but lacks setvbuf. */
1437 #undef _IOFBF
1438 #endif
1439 #ifdef _IOFBF
1440 /* This symbol is defined on recent USG systems.
1441 Someone says without this call USG won't really buffer the file
1442 even with a call to setbuf. */
1443 setvbuf (stdout, _sobuf, _IOFBF, sizeof _sobuf);
1444 #else
1445 setbuf (stdout, _sobuf);
1446 #endif
1447 if (! read_socket_hook && EQ (Vwindow_system, Qnil))
1448 set_terminal_modes ();
1449
1450 if (term_initted && no_redraw_on_reenter)
1451 {
1452 if (display_completed)
1453 direct_output_forward_char (0);
1454 }
1455 else
1456 {
1457 frame_garbaged = 1;
1458 #ifdef MULTI_FRAME
1459 if (FRAMEP (Vterminal_frame))
1460 FRAME_GARBAGED_P (XFRAME (Vterminal_frame)) = 1;
1461 #endif
1462 }
1463
1464 term_initted = 1;
1465 }
1466
1467 /* Return nonzero if safe to use tabs in output.
1468 At the time this is called, init_sys_modes has not been done yet. */
1469
1470 tabs_safe_p ()
1471 {
1472 struct emacs_tty tty;
1473
1474 EMACS_GET_TTY (input_fd, &tty);
1475 return EMACS_TTY_TABS_OK (&tty);
1476 }
1477 \f
1478 /* Get terminal size from system.
1479 Store number of lines into *HEIGHTP and width into *WIDTHP.
1480 We store 0 if there's no valid information. */
1481
1482 get_frame_size (widthp, heightp)
1483 int *widthp, *heightp;
1484 {
1485
1486 #ifdef TIOCGWINSZ
1487
1488 /* BSD-style. */
1489 struct winsize size;
1490
1491 if (ioctl (input_fd, TIOCGWINSZ, &size) == -1)
1492 *widthp = *heightp = 0;
1493 else
1494 {
1495 *widthp = size.ws_col;
1496 *heightp = size.ws_row;
1497 }
1498
1499 #else
1500 #ifdef TIOCGSIZE
1501
1502 /* SunOS - style. */
1503 struct ttysize size;
1504
1505 if (ioctl (input_fd, TIOCGSIZE, &size) == -1)
1506 *widthp = *heightp = 0;
1507 else
1508 {
1509 *widthp = size.ts_cols;
1510 *heightp = size.ts_lines;
1511 }
1512
1513 #else
1514 #ifdef VMS
1515
1516 struct sensemode tty;
1517
1518 SYS$QIOW (0, input_fd, IO$_SENSEMODE, &tty, 0, 0,
1519 &tty.class, 12, 0, 0, 0, 0);
1520 *widthp = tty.scr_wid;
1521 *heightp = tty.scr_len;
1522
1523 #else
1524 #ifdef MSDOS
1525 *widthp = ScreenCols ();
1526 *heightp = ScreenRows ();
1527 #else /* system doesn't know size */
1528 *widthp = 0;
1529 *heightp = 0;
1530 #endif
1531
1532 #endif /* not VMS */
1533 #endif /* not SunOS-style */
1534 #endif /* not BSD-style */
1535 }
1536
1537 /* Set the logical window size associated with descriptor FD
1538 to HEIGHT and WIDTH. This is used mainly with ptys. */
1539
1540 int
1541 set_window_size (fd, height, width)
1542 int fd, height, width;
1543 {
1544 #ifdef TIOCSWINSZ
1545
1546 /* BSD-style. */
1547 struct winsize size;
1548 size.ws_row = height;
1549 size.ws_col = width;
1550
1551 if (ioctl (fd, TIOCSWINSZ, &size) == -1)
1552 return 0; /* error */
1553 else
1554 return 1;
1555
1556 #else
1557 #ifdef TIOCSSIZE
1558
1559 /* SunOS - style. */
1560 struct ttysize size;
1561 size.ts_lines = height;
1562 size.ts_cols = width;
1563
1564 if (ioctl (fd, TIOCGSIZE, &size) == -1)
1565 return 0;
1566 else
1567 return 1;
1568 #else
1569 return -1;
1570 #endif /* not SunOS-style */
1571 #endif /* not BSD-style */
1572 }
1573
1574 \f
1575 /* Prepare the terminal for exiting Emacs; move the cursor to the
1576 bottom of the frame, turn off interrupt-driven I/O, etc. */
1577 reset_sys_modes ()
1578 {
1579 if (noninteractive)
1580 {
1581 fflush (stdout);
1582 return;
1583 }
1584 if (!term_initted)
1585 return;
1586 #ifdef HAVE_X_WINDOWS
1587 /* Emacs' window system on MSDOG uses the `internal terminal' and therefore
1588 needs the clean-up code below. */
1589 if (read_socket_hook || !EQ (Vwindow_system, Qnil))
1590 return;
1591 #endif
1592 cursor_to (FRAME_HEIGHT (selected_frame) - 1, 0);
1593 #ifdef MSDOS
1594 if (!EQ (Vwindow_system, Qnil))
1595 {
1596 /* Change to grey on white. */
1597 putchar ('\e');
1598 putchar ('A');
1599 putchar (7);
1600 }
1601 #endif
1602 clear_end_of_line (FRAME_WIDTH (selected_frame));
1603 /* clear_end_of_line may move the cursor */
1604 cursor_to (FRAME_HEIGHT (selected_frame) - 1, 0);
1605 #if defined (IBMR2AIX) && defined (AIXHFT)
1606 {
1607 /* HFT devices normally use ^J as a LF/CR. We forced it to
1608 do the LF only. Now, we need to reset it. */
1609 struct termio tty;
1610
1611 if (ioctl (1, HFTGETID, &tty) != -1)
1612 write (1, "\033[20h", 5);
1613 }
1614 #endif
1615
1616 reset_terminal_modes ();
1617 fflush (stdout);
1618 #ifdef BSD
1619 #ifndef BSD4_1
1620 /* Avoid possible loss of output when changing terminal modes. */
1621 fsync (fileno (stdout));
1622 #endif
1623 #endif
1624
1625 #ifdef F_SETFL
1626 #ifndef F_SETOWN_BUG
1627 #ifdef F_SETOWN /* F_SETFL does not imply existence of F_SETOWN */
1628 if (interrupt_input)
1629 {
1630 reset_sigio ();
1631 fcntl (input_fd, F_SETOWN, old_fcntl_owner);
1632 }
1633 #endif /* F_SETOWN */
1634 #endif /* F_SETOWN_BUG */
1635 #ifdef O_NDELAY
1636 fcntl (input_fd, F_SETFL, fcntl (input_fd, F_GETFL, 0) & ~O_NDELAY);
1637 #endif
1638 #endif /* F_SETFL */
1639 #ifdef BSD4_1
1640 if (interrupt_input)
1641 reset_sigio ();
1642 #endif /* BSD4_1 */
1643
1644 while (EMACS_SET_TTY (input_fd, &old_tty, 0) < 0 && errno == EINTR)
1645 ;
1646
1647 #ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */
1648 dos_ttcooked ();
1649 #endif
1650
1651 #ifdef SET_LINE_DISCIPLINE
1652 /* Ultrix's termios *ignores* any line discipline except TERMIODISC.
1653 A different old line discipline is therefore not restored, yet.
1654 Restore the old line discipline by hand. */
1655 ioctl (0, TIOCSETD, &old_tty.main.c_line);
1656 #endif
1657
1658 #ifdef AIXHFT
1659 hft_reset ();
1660 #endif
1661
1662 #ifdef BSD_PGRPS
1663 widen_foreground_group ();
1664 #endif
1665 }
1666 \f
1667 #ifdef HAVE_PTYS
1668
1669 /* Set up the proper status flags for use of a pty. */
1670
1671 setup_pty (fd)
1672 int fd;
1673 {
1674 /* I'm told that TOICREMOTE does not mean control chars
1675 "can't be sent" but rather that they don't have
1676 input-editing or signaling effects.
1677 That should be good, because we have other ways
1678 to do those things in Emacs.
1679 However, telnet mode seems not to work on 4.2.
1680 So TIOCREMOTE is turned off now. */
1681
1682 /* Under hp-ux, if TIOCREMOTE is turned on, some calls
1683 will hang. In particular, the "timeout" feature (which
1684 causes a read to return if there is no data available)
1685 does this. Also it is known that telnet mode will hang
1686 in such a way that Emacs must be stopped (perhaps this
1687 is the same problem).
1688
1689 If TIOCREMOTE is turned off, then there is a bug in
1690 hp-ux which sometimes loses data. Apparently the
1691 code which blocks the master process when the internal
1692 buffer fills up does not work. Other than this,
1693 though, everything else seems to work fine.
1694
1695 Since the latter lossage is more benign, we may as well
1696 lose that way. -- cph */
1697 #ifdef FIONBIO
1698 #ifdef SYSV_PTYS
1699 {
1700 int on = 1;
1701 ioctl (fd, FIONBIO, &on);
1702 }
1703 #endif
1704 #endif
1705 #ifdef IBMRTAIX
1706 /* On AIX, the parent gets SIGHUP when a pty attached child dies. So, we */
1707 /* ignore SIGHUP once we've started a child on a pty. Note that this may */
1708 /* cause EMACS not to die when it should, i.e., when its own controlling */
1709 /* tty goes away. I've complained to the AIX developers, and they may */
1710 /* change this behavior, but I'm not going to hold my breath. */
1711 signal (SIGHUP, SIG_IGN);
1712 #endif
1713 }
1714 #endif /* HAVE_PTYS */
1715 \f
1716 #ifdef VMS
1717
1718 /* Assigning an input channel is done at the start of Emacs execution.
1719 This is called each time Emacs is resumed, also, but does nothing
1720 because input_chain is no longer zero. */
1721
1722 init_vms_input ()
1723 {
1724 int status;
1725
1726 if (input_fd == 0)
1727 {
1728 status = SYS$ASSIGN (&input_dsc, &input_fd, 0, 0);
1729 if (! (status & 1))
1730 LIB$STOP (status);
1731 }
1732 }
1733
1734 /* Deassigning the input channel is done before exiting. */
1735
1736 stop_vms_input ()
1737 {
1738 return SYS$DASSGN (input_fd);
1739 }
1740
1741 short input_buffer;
1742
1743 /* Request reading one character into the keyboard buffer.
1744 This is done as soon as the buffer becomes empty. */
1745
1746 queue_kbd_input ()
1747 {
1748 int status;
1749 extern kbd_input_ast ();
1750
1751 waiting_for_ast = 0;
1752 stop_input = 0;
1753 status = SYS$QIO (0, input_fd, IO$_READVBLK,
1754 &input_iosb, kbd_input_ast, 1,
1755 &input_buffer, 1, 0, terminator_mask, 0, 0);
1756 }
1757
1758 int input_count;
1759
1760 /* Ast routine that is called when keyboard input comes in
1761 in accord with the SYS$QIO above. */
1762
1763 kbd_input_ast ()
1764 {
1765 register int c = -1;
1766 int old_errno = errno;
1767 extern EMACS_TIME *input_available_clear_time;
1768
1769 if (waiting_for_ast)
1770 SYS$SETEF (input_ef);
1771 waiting_for_ast = 0;
1772 input_count++;
1773 #ifdef ASTDEBUG
1774 if (input_count == 25)
1775 exit (1);
1776 printf ("Ast # %d,", input_count);
1777 printf (" iosb = %x, %x, %x, %x",
1778 input_iosb.offset, input_iosb.status, input_iosb.termlen,
1779 input_iosb.term);
1780 #endif
1781 if (input_iosb.offset)
1782 {
1783 c = input_buffer;
1784 #ifdef ASTDEBUG
1785 printf (", char = 0%o", c);
1786 #endif
1787 }
1788 #ifdef ASTDEBUG
1789 printf ("\n");
1790 fflush (stdout);
1791 sleep (1);
1792 #endif
1793 if (! stop_input)
1794 queue_kbd_input ();
1795 if (c >= 0)
1796 {
1797 struct input_event e;
1798 e.kind = ascii_keystroke;
1799 XSETINT (e.code, c);
1800 XSETFRAME (e.frame_or_window, selected_frame);
1801 kbd_buffer_store_event (&e);
1802 }
1803 if (input_available_clear_time)
1804 EMACS_SET_SECS_USECS (*input_available_clear_time, 0, 0);
1805 errno = old_errno;
1806 }
1807
1808 /* Wait until there is something in kbd_buffer. */
1809
1810 wait_for_kbd_input ()
1811 {
1812 extern int have_process_input, process_exited;
1813
1814 /* If already something, avoid doing system calls. */
1815 if (detect_input_pending ())
1816 {
1817 return;
1818 }
1819 /* Clear a flag, and tell ast routine above to set it. */
1820 SYS$CLREF (input_ef);
1821 waiting_for_ast = 1;
1822 /* Check for timing error: ast happened while we were doing that. */
1823 if (!detect_input_pending ())
1824 {
1825 /* No timing error: wait for flag to be set. */
1826 set_waiting_for_input (0);
1827 SYS$WFLOR (input_ef, input_eflist);
1828 clear_waiting_for_input (0);
1829 if (!detect_input_pending ())
1830 /* Check for subprocess input availability */
1831 {
1832 int dsp = have_process_input || process_exited;
1833
1834 SYS$CLREF (process_ef);
1835 if (have_process_input)
1836 process_command_input ();
1837 if (process_exited)
1838 process_exit ();
1839 if (dsp)
1840 {
1841 update_mode_lines++;
1842 prepare_menu_bars ();
1843 redisplay_preserve_echo_area ();
1844 }
1845 }
1846 }
1847 waiting_for_ast = 0;
1848 }
1849
1850 /* Get rid of any pending QIO, when we are about to suspend
1851 or when we want to throw away pending input.
1852 We wait for a positive sign that the AST routine has run
1853 and therefore there is no I/O request queued when we return.
1854 SYS$SETAST is used to avoid a timing error. */
1855
1856 end_kbd_input ()
1857 {
1858 #ifdef ASTDEBUG
1859 printf ("At end_kbd_input.\n");
1860 fflush (stdout);
1861 sleep (1);
1862 #endif
1863 if (LIB$AST_IN_PROG ()) /* Don't wait if suspending from kbd_buffer_store_event! */
1864 {
1865 SYS$CANCEL (input_fd);
1866 return;
1867 }
1868
1869 SYS$SETAST (0);
1870 /* Clear a flag, and tell ast routine above to set it. */
1871 SYS$CLREF (input_ef);
1872 waiting_for_ast = 1;
1873 stop_input = 1;
1874 SYS$CANCEL (input_fd);
1875 SYS$SETAST (1);
1876 SYS$WAITFR (input_ef);
1877 waiting_for_ast = 0;
1878 }
1879
1880 /* Wait for either input available or time interval expiry. */
1881
1882 input_wait_timeout (timeval)
1883 int timeval; /* Time to wait, in seconds */
1884 {
1885 int time [2];
1886 static int zero = 0;
1887 static int large = -10000000;
1888
1889 LIB$EMUL (&timeval, &large, &zero, time); /* Convert to VMS format */
1890
1891 /* If already something, avoid doing system calls. */
1892 if (detect_input_pending ())
1893 {
1894 return;
1895 }
1896 /* Clear a flag, and tell ast routine above to set it. */
1897 SYS$CLREF (input_ef);
1898 waiting_for_ast = 1;
1899 /* Check for timing error: ast happened while we were doing that. */
1900 if (!detect_input_pending ())
1901 {
1902 /* No timing error: wait for flag to be set. */
1903 SYS$CANTIM (1, 0);
1904 if (SYS$SETIMR (timer_ef, time, 0, 1) & 1) /* Set timer */
1905 SYS$WFLOR (timer_ef, timer_eflist); /* Wait for timer expiry or input */
1906 }
1907 waiting_for_ast = 0;
1908 }
1909
1910 /* The standard `sleep' routine works some other way
1911 and it stops working if you have ever quit out of it.
1912 This one continues to work. */
1913
1914 sys_sleep (timeval)
1915 int timeval;
1916 {
1917 int time [2];
1918 static int zero = 0;
1919 static int large = -10000000;
1920
1921 LIB$EMUL (&timeval, &large, &zero, time); /* Convert to VMS format */
1922
1923 SYS$CANTIM (1, 0);
1924 if (SYS$SETIMR (timer_ef, time, 0, 1) & 1) /* Set timer */
1925 SYS$WAITFR (timer_ef); /* Wait for timer expiry only */
1926 }
1927
1928 init_sigio (fd)
1929 int fd;
1930 {
1931 request_sigio ();
1932 }
1933
1934 reset_sigio ()
1935 {
1936 unrequest_sigio ();
1937 }
1938
1939 request_sigio ()
1940 {
1941 croak ("request sigio");
1942 }
1943
1944 unrequest_sigio ()
1945 {
1946 croak ("unrequest sigio");
1947 }
1948
1949 #endif /* VMS */
1950 \f
1951 /* Note that VMS compiler won't accept defined (CANNOT_DUMP). */
1952 #ifndef CANNOT_DUMP
1953 #define NEED_STARTS
1954 #endif
1955
1956 #ifndef SYSTEM_MALLOC
1957 #ifndef NEED_STARTS
1958 #define NEED_STARTS
1959 #endif
1960 #endif
1961
1962 #ifdef NEED_STARTS
1963 /* Some systems that cannot dump also cannot implement these. */
1964
1965 /*
1966 * Return the address of the start of the text segment prior to
1967 * doing an unexec. After unexec the return value is undefined.
1968 * See crt0.c for further explanation and _start.
1969 *
1970 */
1971
1972 #ifndef HAVE_TEXT_START
1973 char *
1974 start_of_text ()
1975 {
1976 #ifdef TEXT_START
1977 return ((char *) TEXT_START);
1978 #else
1979 #ifdef GOULD
1980 extern csrt ();
1981 return ((char *) csrt);
1982 #else /* not GOULD */
1983 extern int _start ();
1984 return ((char *) _start);
1985 #endif /* GOULD */
1986 #endif /* TEXT_START */
1987 }
1988 #endif /* not HAVE_TEXT_START */
1989
1990 /*
1991 * Return the address of the start of the data segment prior to
1992 * doing an unexec. After unexec the return value is undefined.
1993 * See crt0.c for further information and definition of data_start.
1994 *
1995 * Apparently, on BSD systems this is etext at startup. On
1996 * USG systems (swapping) this is highly mmu dependent and
1997 * is also dependent on whether or not the program is running
1998 * with shared text. Generally there is a (possibly large)
1999 * gap between end of text and start of data with shared text.
2000 *
2001 * On Uniplus+ systems with shared text, data starts at a
2002 * fixed address. Each port (from a given oem) is generally
2003 * different, and the specific value of the start of data can
2004 * be obtained via the UniPlus+ specific "uvar" system call,
2005 * however the method outlined in crt0.c seems to be more portable.
2006 *
2007 * Probably what will have to happen when a USG unexec is available,
2008 * at least on UniPlus, is temacs will have to be made unshared so
2009 * that text and data are contiguous. Then once loadup is complete,
2010 * unexec will produce a shared executable where the data can be
2011 * at the normal shared text boundry and the startofdata variable
2012 * will be patched by unexec to the correct value.
2013 *
2014 */
2015
2016 char *
2017 start_of_data ()
2018 {
2019 #ifdef DATA_START
2020 return ((char *) DATA_START);
2021 #else
2022 #ifdef ORDINARY_LINK
2023 /*
2024 * This is a hack. Since we're not linking crt0.c or pre_crt0.c,
2025 * data_start isn't defined. We take the address of environ, which
2026 * is known to live at or near the start of the system crt0.c, and
2027 * we don't sweat the handful of bytes that might lose.
2028 */
2029 extern char **environ;
2030
2031 return((char *) &environ);
2032 #else
2033 extern int data_start;
2034 return ((char *) &data_start);
2035 #endif /* ORDINARY_LINK */
2036 #endif /* DATA_START */
2037 }
2038 #endif /* NEED_STARTS (not CANNOT_DUMP or not SYSTEM_MALLOC) */
2039
2040 #ifndef CANNOT_DUMP
2041 /* Some systems that cannot dump also cannot implement these. */
2042
2043 /*
2044 * Return the address of the end of the text segment prior to
2045 * doing an unexec. After unexec the return value is undefined.
2046 */
2047
2048 char *
2049 end_of_text ()
2050 {
2051 #ifdef TEXT_END
2052 return ((char *) TEXT_END);
2053 #else
2054 extern int etext;
2055 return ((char *) &etext);
2056 #endif
2057 }
2058
2059 /*
2060 * Return the address of the end of the data segment prior to
2061 * doing an unexec. After unexec the return value is undefined.
2062 */
2063
2064 char *
2065 end_of_data ()
2066 {
2067 #ifdef DATA_END
2068 return ((char *) DATA_END);
2069 #else
2070 extern int edata;
2071 return ((char *) &edata);
2072 #endif
2073 }
2074
2075 #endif /* not CANNOT_DUMP */
2076 \f
2077 /* init_system_name sets up the string for the Lisp function
2078 system-name to return. */
2079
2080 #ifdef BSD4_1
2081 #include <whoami.h>
2082 #endif
2083
2084 extern Lisp_Object Vsystem_name;
2085
2086 #ifndef BSD4_1
2087 #ifndef VMS
2088 #ifdef HAVE_SOCKETS
2089 #include <sys/socket.h>
2090 #include <netdb.h>
2091 #endif /* HAVE_SOCKETS */
2092 #endif /* not VMS */
2093 #endif /* not BSD4_1 */
2094
2095 void
2096 init_system_name ()
2097 {
2098 #ifdef BSD4_1
2099 Vsystem_name = build_string (sysname);
2100 #else
2101 #ifdef VMS
2102 char *sp, *end;
2103 if ((sp = egetenv ("SYS$NODE")) == 0)
2104 Vsystem_name = build_string ("vax-vms");
2105 else if ((end = index (sp, ':')) == 0)
2106 Vsystem_name = build_string (sp);
2107 else
2108 Vsystem_name = make_string (sp, end - sp);
2109 #else
2110 #ifndef HAVE_GETHOSTNAME
2111 struct utsname uts;
2112 uname (&uts);
2113 Vsystem_name = build_string (uts.nodename);
2114 #else /* HAVE_GETHOSTNAME */
2115 int hostname_size = 256;
2116 char *hostname = (char *) alloca (hostname_size);
2117
2118 /* Try to get the host name; if the buffer is too short, try
2119 again. Apparently, the only indication gethostname gives of
2120 whether the buffer was large enough is the presence or absence
2121 of a '\0' in the string. Eech. */
2122 for (;;)
2123 {
2124 gethostname (hostname, hostname_size - 1);
2125 hostname[hostname_size - 1] = '\0';
2126
2127 /* Was the buffer large enough for the '\0'? */
2128 if (strlen (hostname) < hostname_size - 1)
2129 break;
2130
2131 hostname_size <<= 1;
2132 hostname = (char *) alloca (hostname_size);
2133 }
2134 #ifdef HAVE_SOCKETS
2135 /* Turn the hostname into the official, fully-qualified hostname.
2136 Don't do this if we're going to dump; this can confuse system
2137 libraries on some machines and make the dumped emacs core dump. */
2138 #ifndef CANNOT_DUMP
2139 if (initialized)
2140 #endif /* not CANNOT_DUMP */
2141 {
2142 struct hostent *hp;
2143 int count;
2144 for (count = 0; count < 10; count++)
2145 {
2146 #ifdef TRY_AGAIN
2147 h_errno = 0;
2148 #endif
2149 hp = gethostbyname (hostname);
2150 #ifdef TRY_AGAIN
2151 if (! (hp == 0 && h_errno == TRY_AGAIN))
2152 #endif
2153 break;
2154 Fsleep_for (make_number (1), Qnil);
2155 }
2156 if (hp)
2157 {
2158 char *fqdn = hp->h_name;
2159 char *p;
2160
2161 if (!index (fqdn, '.'))
2162 {
2163 /* We still don't have a fully qualified domain name.
2164 Try to find one in the list of alternate names */
2165 char **alias = hp->h_aliases;
2166 while (*alias && !index (*alias, '.'))
2167 alias++;
2168 if (*alias)
2169 fqdn = *alias;
2170 }
2171 hostname = fqdn;
2172 #if 0
2173 /* Convert the host name to lower case. */
2174 /* Using ctype.h here would introduce a possible locale
2175 dependence that is probably wrong for hostnames. */
2176 p = hostname;
2177 while (*p)
2178 {
2179 if (*p >= 'A' && *p <= 'Z')
2180 *p += 'a' - 'A';
2181 p++;
2182 }
2183 #endif
2184 }
2185 }
2186 #endif /* HAVE_SOCKETS */
2187 Vsystem_name = build_string (hostname);
2188 #endif /* HAVE_GETHOSTNAME */
2189 #endif /* VMS */
2190 #endif /* BSD4_1 */
2191 {
2192 unsigned char *p;
2193 for (p = XSTRING (Vsystem_name)->data; *p; p++)
2194 if (*p == ' ' || *p == '\t')
2195 *p = '-';
2196 }
2197 }
2198 \f
2199 #ifndef VMS
2200 #ifndef HAVE_SELECT
2201
2202 #ifdef HAVE_X_WINDOWS
2203 /* Cause explanatory error message at compile time,
2204 since the select emulation is not good enough for X. */
2205 int *x = &x_windows_lose_if_no_select_system_call;
2206 #endif
2207
2208 /* Emulate as much as select as is possible under 4.1 and needed by Gnu Emacs
2209 * Only checks read descriptors.
2210 */
2211 /* How long to wait between checking fds in select */
2212 #define SELECT_PAUSE 1
2213 int select_alarmed;
2214
2215 /* For longjmp'ing back to read_input_waiting. */
2216
2217 jmp_buf read_alarm_throw;
2218
2219 /* Nonzero if the alarm signal should throw back to read_input_waiting.
2220 The read_socket_hook function sets this to 1 while it is waiting. */
2221
2222 int read_alarm_should_throw;
2223
2224 SIGTYPE
2225 select_alarm ()
2226 {
2227 select_alarmed = 1;
2228 #ifdef BSD4_1
2229 sigrelse (SIGALRM);
2230 #else /* not BSD4_1 */
2231 signal (SIGALRM, SIG_IGN);
2232 #endif /* not BSD4_1 */
2233 if (read_alarm_should_throw)
2234 longjmp (read_alarm_throw, 1);
2235 }
2236
2237 #ifndef WINDOWSNT
2238 /* Only rfds are checked. */
2239 int
2240 select (nfds, rfds, wfds, efds, timeout)
2241 int nfds;
2242 int *rfds, *wfds, *efds, *timeout;
2243 {
2244 int ravail = 0, orfds = 0, old_alarm;
2245 int timeoutval = timeout ? *timeout : 100000;
2246 int *local_timeout = &timeoutval;
2247 extern int proc_buffered_char[];
2248 #ifndef subprocesses
2249 int process_tick = 0, update_tick = 0;
2250 #else
2251 extern int process_tick, update_tick;
2252 #endif
2253 SIGTYPE (*old_trap) ();
2254 unsigned char buf;
2255
2256 if (rfds)
2257 {
2258 orfds = *rfds;
2259 *rfds = 0;
2260 }
2261 if (wfds)
2262 *wfds = 0;
2263 if (efds)
2264 *efds = 0;
2265
2266 /* If we are looking only for the terminal, with no timeout,
2267 just read it and wait -- that's more efficient. */
2268 if (orfds == 1 && *local_timeout == 100000 && process_tick == update_tick)
2269 {
2270 if (! detect_input_pending ())
2271 read_input_waiting ();
2272 *rfds = 1;
2273 return 1;
2274 }
2275
2276 /* Once a second, till the timer expires, check all the flagged read
2277 * descriptors to see if any input is available. If there is some then
2278 * set the corresponding bit in the return copy of rfds.
2279 */
2280 while (1)
2281 {
2282 register int to_check, bit, fd;
2283
2284 if (rfds)
2285 {
2286 for (to_check = nfds, bit = 1, fd = 0; --to_check >= 0; bit <<= 1, fd++)
2287 {
2288 if (orfds & bit)
2289 {
2290 int avail = 0, status = 0;
2291
2292 if (bit == 1)
2293 avail = detect_input_pending (); /* Special keyboard handler */
2294 else
2295 {
2296 #ifdef FIONREAD
2297 status = ioctl (fd, FIONREAD, &avail);
2298 #else /* no FIONREAD */
2299 #ifdef MSDOS
2300 abort (); /* I don't think we need it. */
2301 #else /* not MSDOS */
2302 /* Hoping it will return -1 if nothing available
2303 or 0 if all 0 chars requested are read. */
2304 if (proc_buffered_char[fd] >= 0)
2305 avail = 1;
2306 else
2307 {
2308 avail = read (fd, &buf, 1);
2309 if (avail > 0)
2310 proc_buffered_char[fd] = buf;
2311 }
2312 #endif /* not MSDOS */
2313 #endif /* no FIONREAD */
2314 }
2315 if (status >= 0 && avail > 0)
2316 {
2317 (*rfds) |= bit;
2318 ravail++;
2319 }
2320 }
2321 }
2322 }
2323 if (*local_timeout == 0 || ravail != 0 || process_tick != update_tick)
2324 break;
2325 old_alarm = alarm (0);
2326 old_trap = signal (SIGALRM, select_alarm);
2327 select_alarmed = 0;
2328 alarm (SELECT_PAUSE);
2329 /* Wait for a SIGALRM (or maybe a SIGTINT) */
2330 while (select_alarmed == 0 && *local_timeout != 0
2331 && process_tick == update_tick)
2332 {
2333 #ifdef MSDOS
2334 sleep_or_kbd_hit (SELECT_PAUSE, (orfds & 1) != 0);
2335 select_alarm ();
2336 #else /* not MSDOS */
2337 /* If we are interested in terminal input,
2338 wait by reading the terminal.
2339 That makes instant wakeup for terminal input at least. */
2340 if (orfds & 1)
2341 {
2342 read_input_waiting ();
2343 if (detect_input_pending ())
2344 select_alarmed = 1;
2345 }
2346 else
2347 pause ();
2348 #endif /* not MSDOS */
2349 }
2350 (*local_timeout) -= SELECT_PAUSE;
2351 /* Reset the old alarm if there was one */
2352 alarm (0);
2353 signal (SIGALRM, old_trap);
2354 if (old_alarm != 0)
2355 {
2356 /* Reset or forge an interrupt for the original handler. */
2357 old_alarm -= SELECT_PAUSE;
2358 if (old_alarm <= 0)
2359 kill (getpid (), SIGALRM); /* Fake an alarm with the orig' handler */
2360 else
2361 alarm (old_alarm);
2362 }
2363 if (*local_timeout == 0) /* Stop on timer being cleared */
2364 break;
2365 }
2366 return ravail;
2367 }
2368 #endif /* not WINDOWSNT */
2369
2370 /* Read keyboard input into the standard buffer,
2371 waiting for at least one character. */
2372
2373 /* Make all keyboard buffers much bigger when using X windows. */
2374 #ifdef HAVE_X_WINDOWS
2375 #define BUFFER_SIZE_FACTOR 16
2376 #else
2377 #define BUFFER_SIZE_FACTOR 1
2378 #endif
2379
2380 read_input_waiting ()
2381 {
2382 struct input_event e;
2383 int nread, i;
2384 extern int quit_char;
2385
2386 if (read_socket_hook)
2387 {
2388 struct input_event buf[256];
2389
2390 read_alarm_should_throw = 0;
2391 if (! setjmp (read_alarm_throw))
2392 nread = (*read_socket_hook) (0, buf, 256, 1, 0);
2393 else
2394 nread = -1;
2395
2396 /* Scan the chars for C-g and store them in kbd_buffer. */
2397 for (i = 0; i < nread; i++)
2398 {
2399 kbd_buffer_store_event (&buf[i]);
2400 /* Don't look at input that follows a C-g too closely.
2401 This reduces lossage due to autorepeat on C-g. */
2402 if (buf[i].kind == ascii_keystroke
2403 && XINT(buf[i].code) == quit_char)
2404 break;
2405 }
2406 }
2407 else
2408 {
2409 char buf[3];
2410 nread = read (fileno (stdin), buf, 1);
2411
2412 /* Scan the chars for C-g and store them in kbd_buffer. */
2413 e.kind = ascii_keystroke;
2414 XSETFRAME (e.frame_or_window, selected_frame);
2415 e.modifiers = 0;
2416 for (i = 0; i < nread; i++)
2417 {
2418 /* Convert chars > 0177 to meta events if desired.
2419 We do this under the same conditions that read_avail_input does. */
2420 if (read_socket_hook == 0)
2421 {
2422 /* If the user says she has a meta key, then believe her. */
2423 if (meta_key == 1 && (buf[i] & 0x80))
2424 e.modifiers = meta_modifier;
2425 if (meta_key != 2)
2426 buf[i] &= ~0x80;
2427 }
2428
2429 XSETINT (e.code, buf[i]);
2430 kbd_buffer_store_event (&e);
2431 /* Don't look at input that follows a C-g too closely.
2432 This reduces lossage due to autorepeat on C-g. */
2433 if (buf[i] == quit_char)
2434 break;
2435 }
2436 }
2437 }
2438
2439 #endif /* not HAVE_SELECT */
2440 #endif /* not VMS */
2441 \f
2442 #ifdef BSD4_1
2443 /*
2444 * Partially emulate 4.2 open call.
2445 * open is defined as this in 4.1.
2446 *
2447 * - added by Michael Bloom @ Citicorp/TTI
2448 *
2449 */
2450
2451 int
2452 sys_open (path, oflag, mode)
2453 char *path;
2454 int oflag, mode;
2455 {
2456 if (oflag & O_CREAT)
2457 return creat (path, mode);
2458 else
2459 return open (path, oflag);
2460 }
2461
2462 init_sigio (fd)
2463 int fd;
2464 {
2465 if (noninteractive)
2466 return;
2467 lmode = LINTRUP | lmode;
2468 ioctl (fd, TIOCLSET, &lmode);
2469 }
2470
2471 reset_sigio ()
2472 {
2473 if (noninteractive)
2474 return;
2475 lmode = ~LINTRUP & lmode;
2476 ioctl (0, TIOCLSET, &lmode);
2477 }
2478
2479 request_sigio ()
2480 {
2481 sigrelse (SIGTINT);
2482
2483 interrupts_deferred = 0;
2484 }
2485
2486 unrequest_sigio ()
2487 {
2488 sighold (SIGTINT);
2489
2490 interrupts_deferred = 1;
2491 }
2492
2493 /* still inside #ifdef BSD4_1 */
2494 #ifdef subprocesses
2495
2496 int sigheld; /* Mask of held signals */
2497
2498 sigholdx (signum)
2499 int signum;
2500 {
2501 sigheld |= sigbit (signum);
2502 sighold (signum);
2503 }
2504
2505 sigisheld (signum)
2506 int signum;
2507 {
2508 sigheld |= sigbit (signum);
2509 }
2510
2511 sigunhold (signum)
2512 int signum;
2513 {
2514 sigheld &= ~sigbit (signum);
2515 sigrelse (signum);
2516 }
2517
2518 sigfree () /* Free all held signals */
2519 {
2520 int i;
2521 for (i = 0; i < NSIG; i++)
2522 if (sigheld & sigbit (i))
2523 sigrelse (i);
2524 sigheld = 0;
2525 }
2526
2527 sigbit (i)
2528 {
2529 return 1 << (i - 1);
2530 }
2531 #endif /* subprocesses */
2532 #endif /* BSD4_1 */
2533 \f
2534 /* POSIX signals support - DJB */
2535 /* Anyone with POSIX signals should have ANSI C declarations */
2536
2537 #ifdef POSIX_SIGNALS
2538
2539 sigset_t old_mask, empty_mask, full_mask, temp_mask;
2540 static struct sigaction new_action, old_action;
2541
2542 init_signals ()
2543 {
2544 sigemptyset (&empty_mask);
2545 sigfillset (&full_mask);
2546 }
2547
2548 signal_handler_t
2549 sys_signal (int signal_number, signal_handler_t action)
2550 {
2551 #ifdef DGUX
2552 /* This gets us restartable system calls for efficiency.
2553 The "else" code will works as well. */
2554 return (berk_signal (signal_number, action));
2555 #else
2556 sigemptyset (&new_action.sa_mask);
2557 new_action.sa_handler = action;
2558 #ifdef SA_RESTART
2559 /* Emacs mostly works better with restartable system services. If this
2560 * flag exists, we probably want to turn it on here.
2561 */
2562 new_action.sa_flags = SA_RESTART;
2563 #else
2564 new_action.sa_flags = 0;
2565 #endif
2566 sigaction (signal_number, &new_action, &old_action);
2567 return (old_action.sa_handler);
2568 #endif /* DGUX */
2569 }
2570
2571 #ifndef __GNUC__
2572 /* If we're compiling with GCC, we don't need this function, since it
2573 can be written as a macro. */
2574 sigset_t
2575 sys_sigmask (int sig)
2576 {
2577 sigset_t mask;
2578 sigemptyset (&mask);
2579 sigaddset (&mask, sig);
2580 return mask;
2581 }
2582 #endif
2583
2584 int
2585 sys_sigpause (sigset_t new_mask)
2586 {
2587 /* pause emulating berk sigpause... */
2588 sigsuspend (&new_mask);
2589 return (EINTR);
2590 }
2591
2592 /* I'd like to have these guys return pointers to the mask storage in here,
2593 but there'd be trouble if the code was saving multiple masks. I'll be
2594 safe and pass the structure. It normally won't be more than 2 bytes
2595 anyhow. - DJB */
2596
2597 sigset_t
2598 sys_sigblock (sigset_t new_mask)
2599 {
2600 sigset_t old_mask;
2601 sigprocmask (SIG_BLOCK, &new_mask, &old_mask);
2602 return (old_mask);
2603 }
2604
2605 sigset_t
2606 sys_sigunblock (sigset_t new_mask)
2607 {
2608 sigset_t old_mask;
2609 sigprocmask (SIG_UNBLOCK, &new_mask, &old_mask);
2610 return (old_mask);
2611 }
2612
2613 sigset_t
2614 sys_sigsetmask (sigset_t new_mask)
2615 {
2616 sigset_t old_mask;
2617 sigprocmask (SIG_SETMASK, &new_mask, &old_mask);
2618 return (old_mask);
2619 }
2620
2621 #endif /* POSIX_SIGNALS */
2622 \f
2623 #ifndef BSTRING
2624
2625 #ifndef bzero
2626
2627 void
2628 bzero (b, length)
2629 register char *b;
2630 register int length;
2631 {
2632 #ifdef VMS
2633 short zero = 0;
2634 long max_str = 65535;
2635
2636 while (length > max_str) {
2637 (void) LIB$MOVC5 (&zero, &zero, &zero, &max_str, b);
2638 length -= max_str;
2639 b += max_str;
2640 }
2641 max_str = length;
2642 (void) LIB$MOVC5 (&zero, &zero, &zero, &max_str, b);
2643 #else
2644 while (length-- > 0)
2645 *b++ = 0;
2646 #endif /* not VMS */
2647 }
2648
2649 #endif /* no bzero */
2650
2651 #ifndef bcopy
2652 /* Saying `void' requires a declaration, above, where bcopy is used
2653 and that declaration causes pain for systems where bcopy is a macro. */
2654 bcopy (b1, b2, length)
2655 register char *b1;
2656 register char *b2;
2657 register int length;
2658 {
2659 #ifdef VMS
2660 long max_str = 65535;
2661
2662 while (length > max_str) {
2663 (void) LIB$MOVC3 (&max_str, b1, b2);
2664 length -= max_str;
2665 b1 += max_str;
2666 b2 += max_str;
2667 }
2668 max_str = length;
2669 (void) LIB$MOVC3 (&length, b1, b2);
2670 #else
2671 while (length-- > 0)
2672 *b2++ = *b1++;
2673 #endif /* not VMS */
2674 }
2675 #endif /* no bcopy */
2676
2677 #ifndef bcmp
2678 int
2679 bcmp (b1, b2, length) /* This could be a macro! */
2680 register char *b1;
2681 register char *b2;
2682 register int length;
2683 {
2684 #ifdef VMS
2685 struct dsc$descriptor_s src1 = {length, DSC$K_DTYPE_T, DSC$K_CLASS_S, b1};
2686 struct dsc$descriptor_s src2 = {length, DSC$K_DTYPE_T, DSC$K_CLASS_S, b2};
2687
2688 return STR$COMPARE (&src1, &src2);
2689 #else
2690 while (length-- > 0)
2691 if (*b1++ != *b2++)
2692 return 1;
2693
2694 return 0;
2695 #endif /* not VMS */
2696 }
2697 #endif /* no bcmp */
2698
2699 #endif /* not BSTRING */
2700 \f
2701 #ifndef HAVE_RANDOM
2702 #ifndef random
2703
2704 /*
2705 * The BSD random returns numbers in the range of
2706 * 0 to 2e31 - 1. The USG rand returns numbers in the
2707 * range of 0 to 2e15 - 1. This is probably not significant
2708 * in this usage.
2709 */
2710
2711 long
2712 random ()
2713 {
2714 #ifdef HAVE_LRAND48
2715 return lrand48 ();
2716 #else
2717 /* The BSD rand returns numbers in the range of 0 to 2e31 - 1,
2718 with unusable least significant bits. The USG rand returns
2719 numbers in the range of 0 to 2e15 - 1, all usable. Let us
2720 build a usable 30 bit number from either. */
2721 #ifdef USG
2722 return (rand () << 15) + rand ();
2723 #else
2724 return (rand () & 0x3fff8000) + (rand () >> 16);
2725 #endif
2726 #endif
2727 }
2728
2729 srandom (arg)
2730 int arg;
2731 {
2732 #ifdef HAVE_LRAND48
2733 srand48 (arg);
2734 #else
2735 srand (arg);
2736 #endif
2737 }
2738
2739 #endif /* no random */
2740 #endif /* not HAVE_RANDOM */
2741 \f
2742 #ifdef WRONG_NAME_INSQUE
2743
2744 insque (q,p)
2745 caddr_t q,p;
2746 {
2747 _insque (q,p);
2748 }
2749
2750 #endif
2751 \f
2752 #ifdef VMS
2753
2754 #ifdef getenv
2755 /* If any place else asks for the TERM variable,
2756 allow it to be overridden with the EMACS_TERM variable
2757 before attempting to translate the logical name TERM. As a last
2758 resort, ask for VAX C's special idea of the TERM variable. */
2759 #undef getenv
2760 char *
2761 sys_getenv (name)
2762 char *name;
2763 {
2764 register char *val;
2765 static char buf[256];
2766 static struct dsc$descriptor_s equiv
2767 = {sizeof (buf), DSC$K_DTYPE_T, DSC$K_CLASS_S, buf};
2768 static struct dsc$descriptor_s d_name
2769 = {0, DSC$K_DTYPE_T, DSC$K_CLASS_S, 0};
2770 short eqlen;
2771
2772 if (!strcmp (name, "TERM"))
2773 {
2774 val = (char *) getenv ("EMACS_TERM");
2775 if (val)
2776 return val;
2777 }
2778
2779 d_name.dsc$w_length = strlen (name);
2780 d_name.dsc$a_pointer = name;
2781 if (LIB$SYS_TRNLOG (&d_name, &eqlen, &equiv) == 1)
2782 {
2783 char *str = (char *) xmalloc (eqlen + 1);
2784 bcopy (buf, str, eqlen);
2785 str[eqlen] = '\0';
2786 /* This is a storage leak, but a pain to fix. With luck,
2787 no one will ever notice. */
2788 return str;
2789 }
2790 return (char *) getenv (name);
2791 }
2792 #endif /* getenv */
2793
2794 #ifdef abort
2795 /* Since VMS doesn't believe in core dumps, the only way to debug this beast is
2796 to force a call on the debugger from within the image. */
2797 #undef abort
2798 sys_abort ()
2799 {
2800 reset_sys_modes ();
2801 LIB$SIGNAL (SS$_DEBUG);
2802 }
2803 #endif /* abort */
2804 #endif /* VMS */
2805 \f
2806 #ifdef VMS
2807 #ifdef LINK_CRTL_SHARE
2808 #ifdef SHAREABLE_LIB_BUG
2809 /* Variables declared noshare and initialized in sharable libraries
2810 cannot be shared. The VMS linker incorrectly forces you to use a private
2811 version which is uninitialized... If not for this "feature", we
2812 could use the C library definition of sys_nerr and sys_errlist. */
2813 int sys_nerr = 35;
2814 char *sys_errlist[] =
2815 {
2816 "error 0",
2817 "not owner",
2818 "no such file or directory",
2819 "no such process",
2820 "interrupted system call",
2821 "i/o error",
2822 "no such device or address",
2823 "argument list too long",
2824 "exec format error",
2825 "bad file number",
2826 "no child process",
2827 "no more processes",
2828 "not enough memory",
2829 "permission denied",
2830 "bad address",
2831 "block device required",
2832 "mount devices busy",
2833 "file exists",
2834 "cross-device link",
2835 "no such device",
2836 "not a directory",
2837 "is a directory",
2838 "invalid argument",
2839 "file table overflow",
2840 "too many open files",
2841 "not a typewriter",
2842 "text file busy",
2843 "file too big",
2844 "no space left on device",
2845 "illegal seek",
2846 "read-only file system",
2847 "too many links",
2848 "broken pipe",
2849 "math argument",
2850 "result too large",
2851 "I/O stream empty",
2852 "vax/vms specific error code nontranslatable error"
2853 };
2854 #endif /* SHAREABLE_LIB_BUG */
2855 #endif /* LINK_CRTL_SHARE */
2856 #endif /* VMS */
2857
2858 #ifndef HAVE_STRERROR
2859 #ifndef WINDOWSNT
2860 char *
2861 strerror (errnum)
2862 int errnum;
2863 {
2864 extern char *sys_errlist[];
2865 extern int sys_nerr;
2866
2867 if (errnum >= 0 && errnum < sys_nerr)
2868 return sys_errlist[errnum];
2869 return (char *) "Unknown error";
2870 }
2871 #endif /* not WINDOWSNT */
2872 #endif /* ! HAVE_STRERROR */
2873 \f
2874 #ifdef INTERRUPTIBLE_OPEN
2875
2876 int
2877 /* VARARGS 2 */
2878 sys_open (path, oflag, mode)
2879 char *path;
2880 int oflag, mode;
2881 {
2882 register int rtnval;
2883
2884 while ((rtnval = open (path, oflag, mode)) == -1
2885 && (errno == EINTR));
2886 return (rtnval);
2887 }
2888
2889 #endif /* INTERRUPTIBLE_OPEN */
2890
2891 #ifdef INTERRUPTIBLE_CLOSE
2892
2893 sys_close (fd)
2894 int fd;
2895 {
2896 register int rtnval;
2897
2898 while ((rtnval = close (fd)) == -1
2899 && (errno == EINTR));
2900 return rtnval;
2901 }
2902
2903 #endif /* INTERRUPTIBLE_CLOSE */
2904
2905 #ifdef INTERRUPTIBLE_IO
2906
2907 int
2908 sys_read (fildes, buf, nbyte)
2909 int fildes;
2910 char *buf;
2911 unsigned int nbyte;
2912 {
2913 register int rtnval;
2914
2915 while ((rtnval = read (fildes, buf, nbyte)) == -1
2916 && (errno == EINTR));
2917 return (rtnval);
2918 }
2919
2920 int
2921 sys_write (fildes, buf, nbyte)
2922 int fildes;
2923 char *buf;
2924 unsigned int nbyte;
2925 {
2926 register int rtnval, bytes_written;
2927
2928 bytes_written = 0;
2929
2930 while (nbyte > 0)
2931 {
2932 rtnval = write (fildes, buf, nbyte);
2933
2934 if (rtnval == -1)
2935 {
2936 if (errno == EINTR)
2937 continue;
2938 else
2939 return (bytes_written ? bytes_written : -1);
2940 }
2941
2942 buf += rtnval;
2943 nbyte -= rtnval;
2944 bytes_written += rtnval;
2945 }
2946 return (bytes_written);
2947 }
2948
2949 #endif /* INTERRUPTIBLE_IO */
2950 \f
2951 #ifndef HAVE_VFORK
2952 #ifndef WINDOWSNT
2953 /*
2954 * Substitute fork for vfork on USG flavors.
2955 */
2956
2957 vfork ()
2958 {
2959 return (fork ());
2960 }
2961 #endif /* not WINDOWSNT */
2962 #endif /* not HAVE_VFORK */
2963 \f
2964 #ifdef USG
2965 /*
2966 * All of the following are for USG.
2967 *
2968 * On USG systems the system calls are INTERRUPTIBLE by signals
2969 * that the user program has elected to catch. Thus the system call
2970 * must be retried in these cases. To handle this without massive
2971 * changes in the source code, we remap the standard system call names
2972 * to names for our own functions in sysdep.c that do the system call
2973 * with retries. Actually, for portability reasons, it is good
2974 * programming practice, as this example shows, to limit all actual
2975 * system calls to a single occurrence in the source. Sure, this
2976 * adds an extra level of function call overhead but it is almost
2977 * always negligible. Fred Fish, Unisoft Systems Inc.
2978 */
2979
2980 #ifndef HAVE_SYS_SIGLIST
2981 char *sys_siglist[NSIG + 1] =
2982 {
2983 #ifdef AIX
2984 /* AIX has changed the signals a bit */
2985 "bogus signal", /* 0 */
2986 "hangup", /* 1 SIGHUP */
2987 "interrupt", /* 2 SIGINT */
2988 "quit", /* 3 SIGQUIT */
2989 "illegal instruction", /* 4 SIGILL */
2990 "trace trap", /* 5 SIGTRAP */
2991 "IOT instruction", /* 6 SIGIOT */
2992 "crash likely", /* 7 SIGDANGER */
2993 "floating point exception", /* 8 SIGFPE */
2994 "kill", /* 9 SIGKILL */
2995 "bus error", /* 10 SIGBUS */
2996 "segmentation violation", /* 11 SIGSEGV */
2997 "bad argument to system call", /* 12 SIGSYS */
2998 "write on a pipe with no one to read it", /* 13 SIGPIPE */
2999 "alarm clock", /* 14 SIGALRM */
3000 "software termination signum", /* 15 SIGTERM */
3001 "user defined signal 1", /* 16 SIGUSR1 */
3002 "user defined signal 2", /* 17 SIGUSR2 */
3003 "death of a child", /* 18 SIGCLD */
3004 "power-fail restart", /* 19 SIGPWR */
3005 "bogus signal", /* 20 */
3006 "bogus signal", /* 21 */
3007 "bogus signal", /* 22 */
3008 "bogus signal", /* 23 */
3009 "bogus signal", /* 24 */
3010 "LAN I/O interrupt", /* 25 SIGAIO */
3011 "PTY I/O interrupt", /* 26 SIGPTY */
3012 "I/O intervention required", /* 27 SIGIOINT */
3013 #ifdef AIXHFT
3014 "HFT grant", /* 28 SIGGRANT */
3015 "HFT retract", /* 29 SIGRETRACT */
3016 "HFT sound done", /* 30 SIGSOUND */
3017 "HFT input ready", /* 31 SIGMSG */
3018 #endif
3019 #else /* not AIX */
3020 "bogus signal", /* 0 */
3021 "hangup", /* 1 SIGHUP */
3022 "interrupt", /* 2 SIGINT */
3023 "quit", /* 3 SIGQUIT */
3024 "illegal instruction", /* 4 SIGILL */
3025 "trace trap", /* 5 SIGTRAP */
3026 "IOT instruction", /* 6 SIGIOT */
3027 "EMT instruction", /* 7 SIGEMT */
3028 "floating point exception", /* 8 SIGFPE */
3029 "kill", /* 9 SIGKILL */
3030 "bus error", /* 10 SIGBUS */
3031 "segmentation violation", /* 11 SIGSEGV */
3032 "bad argument to system call", /* 12 SIGSYS */
3033 "write on a pipe with no one to read it", /* 13 SIGPIPE */
3034 "alarm clock", /* 14 SIGALRM */
3035 "software termination signum", /* 15 SIGTERM */
3036 "user defined signal 1", /* 16 SIGUSR1 */
3037 "user defined signal 2", /* 17 SIGUSR2 */
3038 "death of a child", /* 18 SIGCLD */
3039 "power-fail restart", /* 19 SIGPWR */
3040 #ifdef sun
3041 "window size change", /* 20 SIGWINCH */
3042 "urgent socket condition", /* 21 SIGURG */
3043 "pollable event occured", /* 22 SIGPOLL */
3044 "stop (cannot be caught or ignored)", /* 23 SIGSTOP */
3045 "user stop requested from tty", /* 24 SIGTSTP */
3046 "stopped process has been continued", /* 25 SIGCONT */
3047 "background tty read attempted", /* 26 SIGTTIN */
3048 "background tty write attempted", /* 27 SIGTTOU */
3049 "virtual timer expired", /* 28 SIGVTALRM */
3050 "profiling timer expired", /* 29 SIGPROF */
3051 "exceeded cpu limit", /* 30 SIGXCPU */
3052 "exceeded file size limit", /* 31 SIGXFSZ */
3053 "process's lwps are blocked", /* 32 SIGWAITING */
3054 "special signal used by thread library", /* 33 SIGLWP */
3055 #ifdef SIGFREEZE
3056 "Special Signal Used By CPR", /* 34 SIGFREEZE */
3057 #endif
3058 #ifdef SIGTHAW
3059 "Special Signal Used By CPR", /* 35 SIGTHAW */
3060 #endif
3061 #endif /* sun */
3062 #endif /* not AIX */
3063 0
3064 };
3065 #endif /* HAVE_SYS_SIGLIST */
3066
3067 /*
3068 * Warning, this function may not duplicate 4.2 action properly
3069 * under error conditions.
3070 */
3071
3072 #ifndef MAXPATHLEN
3073 /* In 4.1, param.h fails to define this. */
3074 #define MAXPATHLEN 1024
3075 #endif
3076
3077 #ifndef HAVE_GETWD
3078
3079 char *
3080 getwd (pathname)
3081 char *pathname;
3082 {
3083 char *npath, *spath;
3084 extern char *getcwd ();
3085
3086 BLOCK_INPUT; /* getcwd uses malloc */
3087 spath = npath = getcwd ((char *) 0, MAXPATHLEN);
3088 if (spath == 0)
3089 return spath;
3090 /* On Altos 3068, getcwd can return @hostname/dir, so discard
3091 up to first slash. Should be harmless on other systems. */
3092 while (*npath && *npath != '/')
3093 npath++;
3094 strcpy (pathname, npath);
3095 free (spath); /* getcwd uses malloc */
3096 UNBLOCK_INPUT;
3097 return pathname;
3098 }
3099
3100 #endif /* HAVE_GETWD */
3101
3102 /*
3103 * Emulate rename using unlink/link. Note that this is
3104 * only partially correct. Also, doesn't enforce restriction
3105 * that files be of same type (regular->regular, dir->dir, etc).
3106 */
3107
3108 #ifndef HAVE_RENAME
3109
3110 rename (from, to)
3111 const char *from;
3112 const char *to;
3113 {
3114 if (access (from, 0) == 0)
3115 {
3116 unlink (to);
3117 if (link (from, to) == 0)
3118 if (unlink (from) == 0)
3119 return (0);
3120 }
3121 return (-1);
3122 }
3123
3124 #endif
3125
3126
3127 #ifdef HPUX
3128 #ifndef HAVE_PERROR
3129
3130 /* HPUX curses library references perror, but as far as we know
3131 it won't be called. Anyway this definition will do for now. */
3132
3133 perror ()
3134 {
3135 }
3136
3137 #endif /* not HAVE_PERROR */
3138 #endif /* HPUX */
3139
3140 #ifndef HAVE_DUP2
3141
3142 /*
3143 * Emulate BSD dup2. First close newd if it already exists.
3144 * Then, attempt to dup oldd. If not successful, call dup2 recursively
3145 * until we are, then close the unsuccessful ones.
3146 */
3147
3148 dup2 (oldd, newd)
3149 int oldd;
3150 int newd;
3151 {
3152 register int fd, ret;
3153
3154 sys_close (newd);
3155
3156 #ifdef F_DUPFD
3157 fd = fcntl (oldd, F_DUPFD, newd);
3158 if (fd != newd)
3159 error ("can't dup2 (%i,%i) : %s", oldd, newd, strerror (errno));
3160 #else
3161 fd = dup (old);
3162 if (fd == -1)
3163 return -1;
3164 if (fd == new)
3165 return new;
3166 ret = dup2 (old,new);
3167 sys_close (fd);
3168 return ret;
3169 #endif
3170 }
3171
3172 #endif /* not HAVE_DUP2 */
3173
3174 /*
3175 * Gettimeofday. Simulate as much as possible. Only accurate
3176 * to nearest second. Emacs doesn't use tzp so ignore it for now.
3177 * Only needed when subprocesses are defined.
3178 */
3179
3180 #ifdef subprocesses
3181 #ifndef VMS
3182 #ifndef HAVE_GETTIMEOFDAY
3183 #ifdef HAVE_TIMEVAL
3184
3185 /* ARGSUSED */
3186 gettimeofday (tp, tzp)
3187 struct timeval *tp;
3188 struct timezone *tzp;
3189 {
3190 extern long time ();
3191
3192 tp->tv_sec = time ((long *)0);
3193 tp->tv_usec = 0;
3194 if (tzp != 0)
3195 tzp->tz_minuteswest = -1;
3196 }
3197
3198 #endif
3199 #endif
3200 #endif
3201 #endif /* subprocess && !HAVE_GETTIMEOFDAY && HAVE_TIMEVAL && !VMS */
3202
3203 /*
3204 * This function will go away as soon as all the stubs fixed. (fnf)
3205 */
3206
3207 croak (badfunc)
3208 char *badfunc;
3209 {
3210 printf ("%s not yet implemented\r\n", badfunc);
3211 reset_sys_modes ();
3212 exit (1);
3213 }
3214
3215 #endif /* USG */
3216 \f
3217 #ifdef DGUX
3218
3219 char *sys_siglist[NSIG + 1] =
3220 {
3221 "null signal", /* 0 SIGNULL */
3222 "hangup", /* 1 SIGHUP */
3223 "interrupt", /* 2 SIGINT */
3224 "quit", /* 3 SIGQUIT */
3225 "illegal instruction", /* 4 SIGILL */
3226 "trace trap", /* 5 SIGTRAP */
3227 "abort termination", /* 6 SIGABRT */
3228 "SIGEMT", /* 7 SIGEMT */
3229 "floating point exception", /* 8 SIGFPE */
3230 "kill", /* 9 SIGKILL */
3231 "bus error", /* 10 SIGBUS */
3232 "segmentation violation", /* 11 SIGSEGV */
3233 "bad argument to system call", /* 12 SIGSYS */
3234 "write on a pipe with no reader", /* 13 SIGPIPE */
3235 "alarm clock", /* 14 SIGALRM */
3236 "software termination signal", /* 15 SIGTERM */
3237 "user defined signal 1", /* 16 SIGUSR1 */
3238 "user defined signal 2", /* 17 SIGUSR2 */
3239 "child stopped or terminated", /* 18 SIGCLD */
3240 "power-fail restart", /* 19 SIGPWR */
3241 "window size changed", /* 20 SIGWINCH */
3242 "undefined", /* 21 */
3243 "pollable event occurred", /* 22 SIGPOLL */
3244 "sendable stop signal not from tty", /* 23 SIGSTOP */
3245 "stop signal from tty", /* 24 SIGSTP */
3246 "continue a stopped process", /* 25 SIGCONT */
3247 "attempted background tty read", /* 26 SIGTTIN */
3248 "attempted background tty write", /* 27 SIGTTOU */
3249 "undefined", /* 28 */
3250 "undefined", /* 29 */
3251 "undefined", /* 30 */
3252 "undefined", /* 31 */
3253 "undefined", /* 32 */
3254 "socket (TCP/IP) urgent data arrival", /* 33 SIGURG */
3255 "I/O is possible", /* 34 SIGIO */
3256 "exceeded cpu time limit", /* 35 SIGXCPU */
3257 "exceeded file size limit", /* 36 SIGXFSZ */
3258 "virtual time alarm", /* 37 SIGVTALRM */
3259 "profiling time alarm", /* 38 SIGPROF */
3260 "undefined", /* 39 */
3261 "file record locks revoked", /* 40 SIGLOST */
3262 "undefined", /* 41 */
3263 "undefined", /* 42 */
3264 "undefined", /* 43 */
3265 "undefined", /* 44 */
3266 "undefined", /* 45 */
3267 "undefined", /* 46 */
3268 "undefined", /* 47 */
3269 "undefined", /* 48 */
3270 "undefined", /* 49 */
3271 "undefined", /* 50 */
3272 "undefined", /* 51 */
3273 "undefined", /* 52 */
3274 "undefined", /* 53 */
3275 "undefined", /* 54 */
3276 "undefined", /* 55 */
3277 "undefined", /* 56 */
3278 "undefined", /* 57 */
3279 "undefined", /* 58 */
3280 "undefined", /* 59 */
3281 "undefined", /* 60 */
3282 "undefined", /* 61 */
3283 "undefined", /* 62 */
3284 "undefined", /* 63 */
3285 "notification message in mess. queue", /* 64 SIGDGNOTIFY */
3286 0
3287 };
3288
3289 #endif /* DGUX */
3290 \f
3291 /* Directory routines for systems that don't have them. */
3292
3293 #ifdef SYSV_SYSTEM_DIR
3294
3295 #include <dirent.h>
3296
3297 #if defined(BROKEN_CLOSEDIR) || !defined(HAVE_CLOSEDIR)
3298
3299 int
3300 closedir (dirp)
3301 register DIR *dirp; /* stream from opendir */
3302 {
3303 int rtnval;
3304
3305 rtnval = sys_close (dirp->dd_fd);
3306
3307 /* Some systems (like Solaris) allocate the buffer and the DIR all
3308 in one block. Why in the world are we freeing this ourselves
3309 anyway? */
3310 #if ! (defined (sun) && defined (USG5_4))
3311 xfree ((char *) dirp->dd_buf); /* directory block defined in <dirent.h> */
3312 #endif
3313 xfree ((char *) dirp);
3314
3315 return rtnval;
3316 }
3317 #endif /* BROKEN_CLOSEDIR or not HAVE_CLOSEDIR */
3318 #endif /* SYSV_SYSTEM_DIR */
3319
3320 #ifdef NONSYSTEM_DIR_LIBRARY
3321
3322 DIR *
3323 opendir (filename)
3324 char *filename; /* name of directory */
3325 {
3326 register DIR *dirp; /* -> malloc'ed storage */
3327 register int fd; /* file descriptor for read */
3328 struct stat sbuf; /* result of fstat */
3329
3330 fd = sys_open (filename, 0);
3331 if (fd < 0)
3332 return 0;
3333
3334 BLOCK_INPUT;
3335 if (fstat (fd, &sbuf) < 0
3336 || (sbuf.st_mode & S_IFMT) != S_IFDIR
3337 || (dirp = (DIR *) malloc (sizeof (DIR))) == 0)
3338 {
3339 sys_close (fd);
3340 UNBLOCK_INPUT;
3341 return 0; /* bad luck today */
3342 }
3343 UNBLOCK_INPUT;
3344
3345 dirp->dd_fd = fd;
3346 dirp->dd_loc = dirp->dd_size = 0; /* refill needed */
3347
3348 return dirp;
3349 }
3350
3351 void
3352 closedir (dirp)
3353 register DIR *dirp; /* stream from opendir */
3354 {
3355 sys_close (dirp->dd_fd);
3356 xfree ((char *) dirp);
3357 }
3358
3359
3360 #ifndef VMS
3361 #define DIRSIZ 14
3362 struct olddir
3363 {
3364 ino_t od_ino; /* inode */
3365 char od_name[DIRSIZ]; /* filename */
3366 };
3367 #endif /* not VMS */
3368
3369 struct direct dir_static; /* simulated directory contents */
3370
3371 /* ARGUSED */
3372 struct direct *
3373 readdir (dirp)
3374 register DIR *dirp; /* stream from opendir */
3375 {
3376 #ifndef VMS
3377 register struct olddir *dp; /* -> directory data */
3378 #else /* VMS */
3379 register struct dir$_name *dp; /* -> directory data */
3380 register struct dir$_version *dv; /* -> version data */
3381 #endif /* VMS */
3382
3383 for (; ;)
3384 {
3385 if (dirp->dd_loc >= dirp->dd_size)
3386 dirp->dd_loc = dirp->dd_size = 0;
3387
3388 if (dirp->dd_size == 0 /* refill buffer */
3389 && (dirp->dd_size = sys_read (dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ)) <= 0)
3390 return 0;
3391
3392 #ifndef VMS
3393 dp = (struct olddir *) &dirp->dd_buf[dirp->dd_loc];
3394 dirp->dd_loc += sizeof (struct olddir);
3395
3396 if (dp->od_ino != 0) /* not deleted entry */
3397 {
3398 dir_static.d_ino = dp->od_ino;
3399 strncpy (dir_static.d_name, dp->od_name, DIRSIZ);
3400 dir_static.d_name[DIRSIZ] = '\0';
3401 dir_static.d_namlen = strlen (dir_static.d_name);
3402 dir_static.d_reclen = sizeof (struct direct)
3403 - MAXNAMLEN + 3
3404 + dir_static.d_namlen - dir_static.d_namlen % 4;
3405 return &dir_static; /* -> simulated structure */
3406 }
3407 #else /* VMS */
3408 dp = (struct dir$_name *) dirp->dd_buf;
3409 if (dirp->dd_loc == 0)
3410 dirp->dd_loc = (dp->dir$b_namecount&1) ? dp->dir$b_namecount + 1
3411 : dp->dir$b_namecount;
3412 dv = (struct dir$_version *)&dp->dir$t_name[dirp->dd_loc];
3413 dir_static.d_ino = dv->dir$w_fid_num;
3414 dir_static.d_namlen = dp->dir$b_namecount;
3415 dir_static.d_reclen = sizeof (struct direct)
3416 - MAXNAMLEN + 3
3417 + dir_static.d_namlen - dir_static.d_namlen % 4;
3418 strncpy (dir_static.d_name, dp->dir$t_name, dp->dir$b_namecount);
3419 dir_static.d_name[dir_static.d_namlen] = '\0';
3420 dirp->dd_loc = dirp->dd_size; /* only one record at a time */
3421 return &dir_static;
3422 #endif /* VMS */
3423 }
3424 }
3425
3426 #ifdef VMS
3427 /* readdirver is just like readdir except it returns all versions of a file
3428 as separate entries. */
3429
3430 /* ARGUSED */
3431 struct direct *
3432 readdirver (dirp)
3433 register DIR *dirp; /* stream from opendir */
3434 {
3435 register struct dir$_name *dp; /* -> directory data */
3436 register struct dir$_version *dv; /* -> version data */
3437
3438 if (dirp->dd_loc >= dirp->dd_size - sizeof (struct dir$_name))
3439 dirp->dd_loc = dirp->dd_size = 0;
3440
3441 if (dirp->dd_size == 0 /* refill buffer */
3442 && (dirp->dd_size = sys_read (dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ)) <= 0)
3443 return 0;
3444
3445 dp = (struct dir$_name *) dirp->dd_buf;
3446 if (dirp->dd_loc == 0)
3447 dirp->dd_loc = (dp->dir$b_namecount & 1) ? dp->dir$b_namecount + 1
3448 : dp->dir$b_namecount;
3449 dv = (struct dir$_version *) &dp->dir$t_name[dirp->dd_loc];
3450 strncpy (dir_static.d_name, dp->dir$t_name, dp->dir$b_namecount);
3451 sprintf (&dir_static.d_name[dp->dir$b_namecount], ";%d", dv->dir$w_version);
3452 dir_static.d_namlen = strlen (dir_static.d_name);
3453 dir_static.d_ino = dv->dir$w_fid_num;
3454 dir_static.d_reclen = sizeof (struct direct) - MAXNAMLEN + 3
3455 + dir_static.d_namlen - dir_static.d_namlen % 4;
3456 dirp->dd_loc = ((char *) (++dv) - dp->dir$t_name);
3457 return &dir_static;
3458 }
3459
3460 #endif /* VMS */
3461
3462 #endif /* NONSYSTEM_DIR_LIBRARY */
3463
3464 \f
3465 int
3466 set_file_times (filename, atime, mtime)
3467 char *filename;
3468 EMACS_TIME atime, mtime;
3469 {
3470 #ifdef HAVE_UTIMES
3471 struct timeval tv[2];
3472 tv[0] = atime;
3473 tv[1] = mtime;
3474 return utimes (filename, tv);
3475 #else /* not HAVE_UTIMES */
3476 struct utimbuf utb;
3477 utb.actime = EMACS_SECS (atime);
3478 utb.modtime = EMACS_SECS (mtime);
3479 return utime (filename, &utb);
3480 #endif /* not HAVE_UTIMES */
3481 }
3482 \f
3483 /* mkdir and rmdir functions, for systems which don't have them. */
3484
3485 #ifndef HAVE_MKDIR
3486 /*
3487 * Written by Robert Rother, Mariah Corporation, August 1985.
3488 *
3489 * If you want it, it's yours. All I ask in return is that if you
3490 * figure out how to do this in a Bourne Shell script you send me
3491 * a copy.
3492 * sdcsvax!rmr or rmr@uscd
3493 *
3494 * Severely hacked over by John Gilmore to make a 4.2BSD compatible
3495 * subroutine. 11Mar86; hoptoad!gnu
3496 *
3497 * Modified by rmtodd@uokmax 6-28-87 -- when making an already existing dir,
3498 * subroutine didn't return EEXIST. It does now.
3499 */
3500
3501 /*
3502 * Make a directory.
3503 */
3504 #ifdef MKDIR_PROTOTYPE
3505 MKDIR_PROTOTYPE
3506 #else
3507 int
3508 mkdir (dpath, dmode)
3509 char *dpath;
3510 int dmode;
3511 #endif
3512 {
3513 int cpid, status, fd;
3514 struct stat statbuf;
3515
3516 if (stat (dpath, &statbuf) == 0)
3517 {
3518 errno = EEXIST; /* Stat worked, so it already exists */
3519 return -1;
3520 }
3521
3522 /* If stat fails for a reason other than non-existence, return error */
3523 if (errno != ENOENT)
3524 return -1;
3525
3526 synch_process_alive = 1;
3527 switch (cpid = fork ())
3528 {
3529
3530 case -1: /* Error in fork */
3531 return (-1); /* Errno is set already */
3532
3533 case 0: /* Child process */
3534 /*
3535 * Cheap hack to set mode of new directory. Since this
3536 * child process is going away anyway, we zap its umask.
3537 * FIXME, this won't suffice to set SUID, SGID, etc. on this
3538 * directory. Does anybody care?
3539 */
3540 status = umask (0); /* Get current umask */
3541 status = umask (status | (0777 & ~dmode)); /* Set for mkdir */
3542 fd = sys_open("/dev/null", 2);
3543 if (fd >= 0)
3544 {
3545 dup2 (fd, 0);
3546 dup2 (fd, 1);
3547 dup2 (fd, 2);
3548 }
3549 execl ("/bin/mkdir", "mkdir", dpath, (char *) 0);
3550 _exit (-1); /* Can't exec /bin/mkdir */
3551
3552 default: /* Parent process */
3553 wait_for_termination (cpid);
3554 }
3555
3556 if (synch_process_death != 0 || synch_process_retcode != 0)
3557 {
3558 errno = EIO; /* We don't know why, but */
3559 return -1; /* /bin/mkdir failed */
3560 }
3561
3562 return 0;
3563 }
3564 #endif /* not HAVE_MKDIR */
3565
3566 #ifndef HAVE_RMDIR
3567 int
3568 rmdir (dpath)
3569 char *dpath;
3570 {
3571 int cpid, status, fd;
3572 struct stat statbuf;
3573
3574 if (stat (dpath, &statbuf) != 0)
3575 {
3576 /* Stat just set errno. We don't have to */
3577 return -1;
3578 }
3579
3580 synch_process_alive = 1;
3581 switch (cpid = fork ())
3582 {
3583
3584 case -1: /* Error in fork */
3585 return (-1); /* Errno is set already */
3586
3587 case 0: /* Child process */
3588 fd = sys_open("/dev/null", 2);
3589 if (fd >= 0)
3590 {
3591 dup2 (fd, 0);
3592 dup2 (fd, 1);
3593 dup2 (fd, 2);
3594 }
3595 wait_for_termination (cpid);
3596 if (synch_process_death != 0 || synch_process_retcode != 0)
3597 return -1; /* /bin/rmdir failed */
3598 default: /* Parent process */
3599 while (cpid != wait (&status)); /* Wait for kid to finish */
3600 }
3601
3602 if (WIFSIGNALED (status) || WEXITSTATUS (status) != 0)
3603 {
3604 errno = EIO; /* We don't know why, but */
3605 return -1; /* /bin/mkdir failed */
3606 }
3607
3608 return 0;
3609 }
3610 #endif /* !HAVE_RMDIR */
3611
3612
3613 \f
3614 /* Functions for VMS */
3615 #ifdef VMS
3616 #include "vms-pwd.h"
3617 #include <acldef.h>
3618 #include <chpdef.h>
3619 #include <jpidef.h>
3620
3621 /* Return as a string the VMS error string pertaining to STATUS.
3622 Reuses the same static buffer each time it is called. */
3623
3624 char *
3625 vmserrstr (status)
3626 int status; /* VMS status code */
3627 {
3628 int bufadr[2];
3629 short len;
3630 static char buf[257];
3631
3632 bufadr[0] = sizeof buf - 1;
3633 bufadr[1] = (int) buf;
3634 if (! (SYS$GETMSG (status, &len, bufadr, 0x1, 0) & 1))
3635 return "untranslatable VMS error status";
3636 buf[len] = '\0';
3637 return buf;
3638 }
3639
3640 #ifdef access
3641 #undef access
3642
3643 /* The following is necessary because 'access' emulation by VMS C (2.0) does
3644 * not work correctly. (It also doesn't work well in version 2.3.)
3645 */
3646
3647 #ifdef VMS4_4
3648
3649 #define DESCRIPTOR(name,string) struct dsc$descriptor_s name = \
3650 { strlen (string), DSC$K_DTYPE_T, DSC$K_CLASS_S, string }
3651
3652 typedef union {
3653 struct {
3654 unsigned short s_buflen;
3655 unsigned short s_code;
3656 char *s_bufadr;
3657 unsigned short *s_retlenadr;
3658 } s;
3659 int end;
3660 } item;
3661 #define buflen s.s_buflen
3662 #define code s.s_code
3663 #define bufadr s.s_bufadr
3664 #define retlenadr s.s_retlenadr
3665
3666 #define R_OK 4 /* test for read permission */
3667 #define W_OK 2 /* test for write permission */
3668 #define X_OK 1 /* test for execute (search) permission */
3669 #define F_OK 0 /* test for presence of file */
3670
3671 int
3672 sys_access (path, mode)
3673 char *path;
3674 int mode;
3675 {
3676 static char *user = NULL;
3677 char dir_fn[512];
3678
3679 /* translate possible directory spec into .DIR file name, so brain-dead
3680 * access can treat the directory like a file. */
3681 if (directory_file_name (path, dir_fn))
3682 path = dir_fn;
3683
3684 if (mode == F_OK)
3685 return access (path, mode);
3686 if (user == NULL && (user = (char *) getenv ("USER")) == NULL)
3687 return -1;
3688 {
3689 int stat;
3690 int flags;
3691 int acces;
3692 unsigned short int dummy;
3693 item itemlst[3];
3694 static int constant = ACL$C_FILE;
3695 DESCRIPTOR (path_desc, path);
3696 DESCRIPTOR (user_desc, user);
3697
3698 flags = 0;
3699 acces = 0;
3700 if ((mode & X_OK) && ((stat = access (path, mode)) < 0 || mode == X_OK))
3701 return stat;
3702 if (mode & R_OK)
3703 acces |= CHP$M_READ;
3704 if (mode & W_OK)
3705 acces |= CHP$M_WRITE;
3706 itemlst[0].buflen = sizeof (int);
3707 itemlst[0].code = CHP$_FLAGS;
3708 itemlst[0].bufadr = (char *) &flags;
3709 itemlst[0].retlenadr = &dummy;
3710 itemlst[1].buflen = sizeof (int);
3711 itemlst[1].code = CHP$_ACCESS;
3712 itemlst[1].bufadr = (char *) &acces;
3713 itemlst[1].retlenadr = &dummy;
3714 itemlst[2].end = CHP$_END;
3715 stat = SYS$CHECK_ACCESS (&constant, &path_desc, &user_desc, itemlst);
3716 return stat == SS$_NORMAL ? 0 : -1;
3717 }
3718 }
3719
3720 #else /* not VMS4_4 */
3721
3722 #include <prvdef.h>
3723 #define ACE$M_WRITE 2
3724 #define ACE$C_KEYID 1
3725
3726 static unsigned short memid, grpid;
3727 static unsigned int uic;
3728
3729 /* Called from init_sys_modes, so it happens not very often
3730 but at least each time Emacs is loaded. */
3731 sys_access_reinit ()
3732 {
3733 uic = 0;
3734 }
3735
3736 int
3737 sys_access (filename, type)
3738 char * filename;
3739 int type;
3740 {
3741 struct FAB fab;
3742 struct XABPRO xab;
3743 int status, size, i, typecode, acl_controlled;
3744 unsigned int *aclptr, *aclend, aclbuf[60];
3745 union prvdef prvmask;
3746
3747 /* Get UIC and GRP values for protection checking. */
3748 if (uic == 0)
3749 {
3750 status = LIB$GETJPI (&JPI$_UIC, 0, 0, &uic, 0, 0);
3751 if (! (status & 1))
3752 return -1;
3753 memid = uic & 0xFFFF;
3754 grpid = uic >> 16;
3755 }
3756
3757 if (type != 2) /* not checking write access */
3758 return access (filename, type);
3759
3760 /* Check write protection. */
3761
3762 #define CHECKPRIV(bit) (prvmask.bit)
3763 #define WRITEABLE(field) (! ((xab.xab$w_pro >> field) & XAB$M_NOWRITE))
3764
3765 /* Find privilege bits */
3766 status = SYS$SETPRV (0, 0, 0, prvmask);
3767 if (! (status & 1))
3768 error ("Unable to find privileges: %s", vmserrstr (status));
3769 if (CHECKPRIV (PRV$V_BYPASS))
3770 return 0; /* BYPASS enabled */
3771 fab = cc$rms_fab;
3772 fab.fab$b_fac = FAB$M_GET;
3773 fab.fab$l_fna = filename;
3774 fab.fab$b_fns = strlen (filename);
3775 fab.fab$l_xab = &xab;
3776 xab = cc$rms_xabpro;
3777 xab.xab$l_aclbuf = aclbuf;
3778 xab.xab$w_aclsiz = sizeof (aclbuf);
3779 status = SYS$OPEN (&fab, 0, 0);
3780 if (! (status & 1))
3781 return -1;
3782 SYS$CLOSE (&fab, 0, 0);
3783 /* Check system access */
3784 if (CHECKPRIV (PRV$V_SYSPRV) && WRITEABLE (XAB$V_SYS))
3785 return 0;
3786 /* Check ACL entries, if any */
3787 acl_controlled = 0;
3788 if (xab.xab$w_acllen > 0)
3789 {
3790 aclptr = aclbuf;
3791 aclend = &aclbuf[xab.xab$w_acllen / 4];
3792 while (*aclptr && aclptr < aclend)
3793 {
3794 size = (*aclptr & 0xff) / 4;
3795 typecode = (*aclptr >> 8) & 0xff;
3796 if (typecode == ACE$C_KEYID)
3797 for (i = size - 1; i > 1; i--)
3798 if (aclptr[i] == uic)
3799 {
3800 acl_controlled = 1;
3801 if (aclptr[1] & ACE$M_WRITE)
3802 return 0; /* Write access through ACL */
3803 }
3804 aclptr = &aclptr[size];
3805 }
3806 if (acl_controlled) /* ACL specified, prohibits write access */
3807 return -1;
3808 }
3809 /* No ACL entries specified, check normal protection */
3810 if (WRITEABLE (XAB$V_WLD)) /* World writeable */
3811 return 0;
3812 if (WRITEABLE (XAB$V_GRP) &&
3813 (unsigned short) (xab.xab$l_uic >> 16) == grpid)
3814 return 0; /* Group writeable */
3815 if (WRITEABLE (XAB$V_OWN) &&
3816 (xab.xab$l_uic & 0xFFFF) == memid)
3817 return 0; /* Owner writeable */
3818
3819 return -1; /* Not writeable */
3820 }
3821 #endif /* not VMS4_4 */
3822 #endif /* access */
3823
3824 static char vtbuf[NAM$C_MAXRSS+1];
3825
3826 /* translate a vms file spec to a unix path */
3827 char *
3828 sys_translate_vms (vfile)
3829 char * vfile;
3830 {
3831 char * p;
3832 char * targ;
3833
3834 if (!vfile)
3835 return 0;
3836
3837 targ = vtbuf;
3838
3839 /* leading device or logical name is a root directory */
3840 if (p = strchr (vfile, ':'))
3841 {
3842 *targ++ = '/';
3843 while (vfile < p)
3844 *targ++ = *vfile++;
3845 vfile++;
3846 *targ++ = '/';
3847 }
3848 p = vfile;
3849 if (*p == '[' || *p == '<')
3850 {
3851 while (*++vfile != *p + 2)
3852 switch (*vfile)
3853 {
3854 case '.':
3855 if (vfile[-1] == *p)
3856 *targ++ = '.';
3857 *targ++ = '/';
3858 break;
3859
3860 case '-':
3861 *targ++ = '.';
3862 *targ++ = '.';
3863 break;
3864
3865 default:
3866 *targ++ = *vfile;
3867 break;
3868 }
3869 vfile++;
3870 *targ++ = '/';
3871 }
3872 while (*vfile)
3873 *targ++ = *vfile++;
3874
3875 return vtbuf;
3876 }
3877
3878 static char utbuf[NAM$C_MAXRSS+1];
3879
3880 /* translate a unix path to a VMS file spec */
3881 char *
3882 sys_translate_unix (ufile)
3883 char * ufile;
3884 {
3885 int slash_seen = 0;
3886 char *p;
3887 char * targ;
3888
3889 if (!ufile)
3890 return 0;
3891
3892 targ = utbuf;
3893
3894 if (*ufile == '/')
3895 {
3896 ufile++;
3897 }
3898
3899 while (*ufile)
3900 {
3901 switch (*ufile)
3902 {
3903 case '/':
3904 if (slash_seen)
3905 if (index (&ufile[1], '/'))
3906 *targ++ = '.';
3907 else
3908 *targ++ = ']';
3909 else
3910 {
3911 *targ++ = ':';
3912 if (index (&ufile[1], '/'))
3913 *targ++ = '[';
3914 slash_seen = 1;
3915 }
3916 break;
3917
3918 case '.':
3919 if (strncmp (ufile, "./", 2) == 0)
3920 {
3921 if (!slash_seen)
3922 {
3923 *targ++ = '[';
3924 slash_seen = 1;
3925 }
3926 ufile++; /* skip the dot */
3927 if (index (&ufile[1], '/'))
3928 *targ++ = '.';
3929 else
3930 *targ++ = ']';
3931 }
3932 else if (strncmp (ufile, "../", 3) == 0)
3933 {
3934 if (!slash_seen)
3935 {
3936 *targ++ = '[';
3937 slash_seen = 1;
3938 }
3939 *targ++ = '-';
3940 ufile += 2; /* skip the dots */
3941 if (index (&ufile[1], '/'))
3942 *targ++ = '.';
3943 else
3944 *targ++ = ']';
3945 }
3946 else
3947 *targ++ = *ufile;
3948 break;
3949
3950 default:
3951 *targ++ = *ufile;
3952 break;
3953 }
3954 ufile++;
3955 }
3956 *targ = '\0';
3957
3958 return utbuf;
3959 }
3960
3961 char *
3962 getwd (pathname)
3963 char *pathname;
3964 {
3965 char *ptr, *val;
3966 extern char *getcwd ();
3967
3968 #define MAXPATHLEN 1024
3969
3970 ptr = xmalloc (MAXPATHLEN);
3971 val = getcwd (ptr, MAXPATHLEN);
3972 if (val == 0)
3973 {
3974 xfree (ptr);
3975 return val;
3976 }
3977 strcpy (pathname, ptr);
3978 xfree (ptr);
3979
3980 return pathname;
3981 }
3982
3983 getppid ()
3984 {
3985 long item_code = JPI$_OWNER;
3986 unsigned long parent_id;
3987 int status;
3988
3989 if (((status = LIB$GETJPI (&item_code, 0, 0, &parent_id)) & 1) == 0)
3990 {
3991 errno = EVMSERR;
3992 vaxc$errno = status;
3993 return -1;
3994 }
3995 return parent_id;
3996 }
3997
3998 #undef getuid
3999 unsigned
4000 sys_getuid ()
4001 {
4002 return (getgid () << 16) | getuid ();
4003 }
4004
4005 int
4006 sys_read (fildes, buf, nbyte)
4007 int fildes;
4008 char *buf;
4009 unsigned int nbyte;
4010 {
4011 return read (fildes, buf, (nbyte < MAXIOSIZE ? nbyte : MAXIOSIZE));
4012 }
4013
4014 #if 0
4015 int
4016 sys_write (fildes, buf, nbyte)
4017 int fildes;
4018 char *buf;
4019 unsigned int nbyte;
4020 {
4021 register int nwrote, rtnval = 0;
4022
4023 while (nbyte > MAXIOSIZE && (nwrote = write (fildes, buf, MAXIOSIZE)) > 0) {
4024 nbyte -= nwrote;
4025 buf += nwrote;
4026 rtnval += nwrote;
4027 }
4028 if (nwrote < 0)
4029 return rtnval ? rtnval : -1;
4030 if ((nwrote = write (fildes, buf, nbyte)) < 0)
4031 return rtnval ? rtnval : -1;
4032 return (rtnval + nwrote);
4033 }
4034 #endif /* 0 */
4035
4036 /*
4037 * VAX/VMS VAX C RTL really loses. It insists that records
4038 * end with a newline (carriage return) character, and if they
4039 * don't it adds one (nice of it isn't it!)
4040 *
4041 * Thus we do this stupidity below.
4042 */
4043
4044 int
4045 sys_write (fildes, buf, nbytes)
4046 int fildes;
4047 char *buf;
4048 unsigned int nbytes;
4049 {
4050 register char *p;
4051 register char *e;
4052 int sum = 0;
4053 struct stat st;
4054
4055 fstat (fildes, &st);
4056 p = buf;
4057 while (nbytes > 0)
4058 {
4059 int len, retval;
4060
4061 /* Handle fixed-length files with carriage control. */
4062 if (st.st_fab_rfm == FAB$C_FIX
4063 && ((st.st_fab_rat & (FAB$M_FTN | FAB$M_CR)) != 0))
4064 {
4065 len = st.st_fab_mrs;
4066 retval = write (fildes, p, min (len, nbytes));
4067 if (retval != len)
4068 return -1;
4069 retval++; /* This skips the implied carriage control */
4070 }
4071 else
4072 {
4073 e = p + min (MAXIOSIZE, nbytes) - 1;
4074 while (*e != '\n' && e > p) e--;
4075 if (p == e) /* Ok.. so here we add a newline... sigh. */
4076 e = p + min (MAXIOSIZE, nbytes) - 1;
4077 len = e + 1 - p;
4078 retval = write (fildes, p, len);
4079 if (retval != len)
4080 return -1;
4081 }
4082 p += retval;
4083 sum += retval;
4084 nbytes -= retval;
4085 }
4086 return sum;
4087 }
4088
4089 /* Create file NEW copying its attributes from file OLD. If
4090 OLD is 0 or does not exist, create based on the value of
4091 vms_stmlf_recfm. */
4092
4093 /* Protection value the file should ultimately have.
4094 Set by create_copy_attrs, and use by rename_sansversions. */
4095 static unsigned short int fab_final_pro;
4096
4097 int
4098 creat_copy_attrs (old, new)
4099 char *old, *new;
4100 {
4101 struct FAB fab = cc$rms_fab;
4102 struct XABPRO xabpro;
4103 char aclbuf[256]; /* Choice of size is arbitrary. See below. */
4104 extern int vms_stmlf_recfm;
4105
4106 if (old)
4107 {
4108 fab.fab$b_fac = FAB$M_GET;
4109 fab.fab$l_fna = old;
4110 fab.fab$b_fns = strlen (old);
4111 fab.fab$l_xab = (char *) &xabpro;
4112 xabpro = cc$rms_xabpro;
4113 xabpro.xab$l_aclbuf = aclbuf;
4114 xabpro.xab$w_aclsiz = sizeof aclbuf;
4115 /* Call $OPEN to fill in the fab & xabpro fields. */
4116 if (SYS$OPEN (&fab, 0, 0) & 1)
4117 {
4118 SYS$CLOSE (&fab, 0, 0);
4119 fab.fab$l_alq = 0; /* zero the allocation quantity */
4120 if (xabpro.xab$w_acllen > 0)
4121 {
4122 if (xabpro.xab$w_acllen > sizeof aclbuf)
4123 /* If the acl buffer was too short, redo open with longer one.
4124 Wouldn't need to do this if there were some system imposed
4125 limit on the size of an ACL, but I can't find any such. */
4126 {
4127 xabpro.xab$l_aclbuf = (char *) alloca (xabpro.xab$w_acllen);
4128 xabpro.xab$w_aclsiz = xabpro.xab$w_acllen;
4129 if (SYS$OPEN (&fab, 0, 0) & 1)
4130 SYS$CLOSE (&fab, 0, 0);
4131 else
4132 old = 0;
4133 }
4134 }
4135 else
4136 xabpro.xab$l_aclbuf = 0;
4137 }
4138 else
4139 old = 0;
4140 }
4141 fab.fab$l_fna = new;
4142 fab.fab$b_fns = strlen (new);
4143 if (!old)
4144 {
4145 fab.fab$l_xab = 0;
4146 fab.fab$b_rfm = vms_stmlf_recfm ? FAB$C_STMLF : FAB$C_VAR;
4147 fab.fab$b_rat = FAB$M_CR;
4148 }
4149
4150 /* Set the file protections such that we will be able to manipulate
4151 this file. Once we are done writing and renaming it, we will set
4152 the protections back. */
4153 if (old)
4154 fab_final_pro = xabpro.xab$w_pro;
4155 else
4156 SYS$SETDFPROT (0, &fab_final_pro);
4157 xabpro.xab$w_pro &= 0xff0f; /* set O:rewd for now. This is set back later. */
4158
4159 /* Create the new file with either default attrs or attrs copied
4160 from old file. */
4161 if (!(SYS$CREATE (&fab, 0, 0) & 1))
4162 return -1;
4163 SYS$CLOSE (&fab, 0, 0);
4164 /* As this is a "replacement" for creat, return a file descriptor
4165 opened for writing. */
4166 return open (new, O_WRONLY);
4167 }
4168
4169 #ifdef creat
4170 #undef creat
4171 #include <varargs.h>
4172 #ifdef __GNUC__
4173 #ifndef va_count
4174 #define va_count(X) ((X) = *(((int *) &(va_alist)) - 1))
4175 #endif
4176 #endif
4177
4178 sys_creat (va_alist)
4179 va_dcl
4180 {
4181 va_list list_incrementer;
4182 char *name;
4183 int mode;
4184 int rfd; /* related file descriptor */
4185 int fd; /* Our new file descriptor */
4186 int count;
4187 struct stat st_buf;
4188 char rfm[12];
4189 char rat[15];
4190 char mrs[13];
4191 char fsz[13];
4192 extern int vms_stmlf_recfm;
4193
4194 va_count (count);
4195 va_start (list_incrementer);
4196 name = va_arg (list_incrementer, char *);
4197 mode = va_arg (list_incrementer, int);
4198 if (count > 2)
4199 rfd = va_arg (list_incrementer, int);
4200 va_end (list_incrementer);
4201 if (count > 2)
4202 {
4203 /* Use information from the related file descriptor to set record
4204 format of the newly created file. */
4205 fstat (rfd, &st_buf);
4206 switch (st_buf.st_fab_rfm)
4207 {
4208 case FAB$C_FIX:
4209 strcpy (rfm, "rfm = fix");
4210 sprintf (mrs, "mrs = %d", st_buf.st_fab_mrs);
4211 strcpy (rat, "rat = ");
4212 if (st_buf.st_fab_rat & FAB$M_CR)
4213 strcat (rat, "cr");
4214 else if (st_buf.st_fab_rat & FAB$M_FTN)
4215 strcat (rat, "ftn");
4216 else if (st_buf.st_fab_rat & FAB$M_PRN)
4217 strcat (rat, "prn");
4218 if (st_buf.st_fab_rat & FAB$M_BLK)
4219 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4220 strcat (rat, ", blk");
4221 else
4222 strcat (rat, "blk");
4223 return creat (name, 0, rfm, rat, mrs);
4224
4225 case FAB$C_VFC:
4226 strcpy (rfm, "rfm = vfc");
4227 sprintf (fsz, "fsz = %d", st_buf.st_fab_fsz);
4228 strcpy (rat, "rat = ");
4229 if (st_buf.st_fab_rat & FAB$M_CR)
4230 strcat (rat, "cr");
4231 else if (st_buf.st_fab_rat & FAB$M_FTN)
4232 strcat (rat, "ftn");
4233 else if (st_buf.st_fab_rat & FAB$M_PRN)
4234 strcat (rat, "prn");
4235 if (st_buf.st_fab_rat & FAB$M_BLK)
4236 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4237 strcat (rat, ", blk");
4238 else
4239 strcat (rat, "blk");
4240 return creat (name, 0, rfm, rat, fsz);
4241
4242 case FAB$C_STM:
4243 strcpy (rfm, "rfm = stm");
4244 break;
4245
4246 case FAB$C_STMCR:
4247 strcpy (rfm, "rfm = stmcr");
4248 break;
4249
4250 case FAB$C_STMLF:
4251 strcpy (rfm, "rfm = stmlf");
4252 break;
4253
4254 case FAB$C_UDF:
4255 strcpy (rfm, "rfm = udf");
4256 break;
4257
4258 case FAB$C_VAR:
4259 strcpy (rfm, "rfm = var");
4260 break;
4261 }
4262 strcpy (rat, "rat = ");
4263 if (st_buf.st_fab_rat & FAB$M_CR)
4264 strcat (rat, "cr");
4265 else if (st_buf.st_fab_rat & FAB$M_FTN)
4266 strcat (rat, "ftn");
4267 else if (st_buf.st_fab_rat & FAB$M_PRN)
4268 strcat (rat, "prn");
4269 if (st_buf.st_fab_rat & FAB$M_BLK)
4270 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4271 strcat (rat, ", blk");
4272 else
4273 strcat (rat, "blk");
4274 }
4275 else
4276 {
4277 strcpy (rfm, vms_stmlf_recfm ? "rfm = stmlf" : "rfm=var");
4278 strcpy (rat, "rat=cr");
4279 }
4280 /* Until the VAX C RTL fixes the many bugs with modes, always use
4281 mode 0 to get the user's default protection. */
4282 fd = creat (name, 0, rfm, rat);
4283 if (fd < 0 && errno == EEXIST)
4284 {
4285 if (unlink (name) < 0)
4286 report_file_error ("delete", build_string (name));
4287 fd = creat (name, 0, rfm, rat);
4288 }
4289 return fd;
4290 }
4291 #endif /* creat */
4292
4293 /* fwrite to stdout is S L O W. Speed it up by using fputc...*/
4294 sys_fwrite (ptr, size, num, fp)
4295 register char * ptr;
4296 FILE * fp;
4297 {
4298 register int tot = num * size;
4299
4300 while (tot--)
4301 fputc (*ptr++, fp);
4302 }
4303
4304 /*
4305 * The VMS C library routine creat actually creates a new version of an
4306 * existing file rather than truncating the old version. There are times
4307 * when this is not the desired behavior, for instance, when writing an
4308 * auto save file (you only want one version), or when you don't have
4309 * write permission in the directory containing the file (but the file
4310 * itself is writable). Hence this routine, which is equivalent to
4311 * "close (creat (fn, 0));" on Unix if fn already exists.
4312 */
4313 int
4314 vms_truncate (fn)
4315 char *fn;
4316 {
4317 struct FAB xfab = cc$rms_fab;
4318 struct RAB xrab = cc$rms_rab;
4319 int status;
4320
4321 xfab.fab$l_fop = FAB$M_TEF; /* free allocated but unused blocks on close */
4322 xfab.fab$b_fac = FAB$M_TRN | FAB$M_GET; /* allow truncate and get access */
4323 xfab.fab$b_shr = FAB$M_NIL; /* allow no sharing - file must be locked */
4324 xfab.fab$l_fna = fn;
4325 xfab.fab$b_fns = strlen (fn);
4326 xfab.fab$l_dna = ";0"; /* default to latest version of the file */
4327 xfab.fab$b_dns = 2;
4328 xrab.rab$l_fab = &xfab;
4329
4330 /* This gibberish opens the file, positions to the first record, and
4331 deletes all records from there until the end of file. */
4332 if ((SYS$OPEN (&xfab) & 01) == 01)
4333 {
4334 if ((SYS$CONNECT (&xrab) & 01) == 01 &&
4335 (SYS$FIND (&xrab) & 01) == 01 &&
4336 (SYS$TRUNCATE (&xrab) & 01) == 01)
4337 status = 0;
4338 else
4339 status = -1;
4340 }
4341 else
4342 status = -1;
4343 SYS$CLOSE (&xfab);
4344 return status;
4345 }
4346
4347 /* Define this symbol to actually read SYSUAF.DAT. This requires either
4348 SYSPRV or a readable SYSUAF.DAT. */
4349
4350 #ifdef READ_SYSUAF
4351 /*
4352 * getuaf.c
4353 *
4354 * Routine to read the VMS User Authorization File and return
4355 * a specific user's record.
4356 */
4357
4358 static struct UAF retuaf;
4359
4360 struct UAF *
4361 get_uaf_name (uname)
4362 char * uname;
4363 {
4364 register status;
4365 struct FAB uaf_fab;
4366 struct RAB uaf_rab;
4367
4368 uaf_fab = cc$rms_fab;
4369 uaf_rab = cc$rms_rab;
4370 /* initialize fab fields */
4371 uaf_fab.fab$l_fna = "SYS$SYSTEM:SYSUAF.DAT";
4372 uaf_fab.fab$b_fns = 21;
4373 uaf_fab.fab$b_fac = FAB$M_GET;
4374 uaf_fab.fab$b_org = FAB$C_IDX;
4375 uaf_fab.fab$b_shr = FAB$M_GET|FAB$M_PUT|FAB$M_UPD|FAB$M_DEL;
4376 /* initialize rab fields */
4377 uaf_rab.rab$l_fab = &uaf_fab;
4378 /* open the User Authorization File */
4379 status = SYS$OPEN (&uaf_fab);
4380 if (!(status&1))
4381 {
4382 errno = EVMSERR;
4383 vaxc$errno = status;
4384 return 0;
4385 }
4386 status = SYS$CONNECT (&uaf_rab);
4387 if (!(status&1))
4388 {
4389 errno = EVMSERR;
4390 vaxc$errno = status;
4391 return 0;
4392 }
4393 /* read the requested record - index is in uname */
4394 uaf_rab.rab$l_kbf = uname;
4395 uaf_rab.rab$b_ksz = strlen (uname);
4396 uaf_rab.rab$b_rac = RAB$C_KEY;
4397 uaf_rab.rab$l_ubf = (char *)&retuaf;
4398 uaf_rab.rab$w_usz = sizeof retuaf;
4399 status = SYS$GET (&uaf_rab);
4400 if (!(status&1))
4401 {
4402 errno = EVMSERR;
4403 vaxc$errno = status;
4404 return 0;
4405 }
4406 /* close the User Authorization File */
4407 status = SYS$DISCONNECT (&uaf_rab);
4408 if (!(status&1))
4409 {
4410 errno = EVMSERR;
4411 vaxc$errno = status;
4412 return 0;
4413 }
4414 status = SYS$CLOSE (&uaf_fab);
4415 if (!(status&1))
4416 {
4417 errno = EVMSERR;
4418 vaxc$errno = status;
4419 return 0;
4420 }
4421 return &retuaf;
4422 }
4423
4424 struct UAF *
4425 get_uaf_uic (uic)
4426 unsigned long uic;
4427 {
4428 register status;
4429 struct FAB uaf_fab;
4430 struct RAB uaf_rab;
4431
4432 uaf_fab = cc$rms_fab;
4433 uaf_rab = cc$rms_rab;
4434 /* initialize fab fields */
4435 uaf_fab.fab$l_fna = "SYS$SYSTEM:SYSUAF.DAT";
4436 uaf_fab.fab$b_fns = 21;
4437 uaf_fab.fab$b_fac = FAB$M_GET;
4438 uaf_fab.fab$b_org = FAB$C_IDX;
4439 uaf_fab.fab$b_shr = FAB$M_GET|FAB$M_PUT|FAB$M_UPD|FAB$M_DEL;
4440 /* initialize rab fields */
4441 uaf_rab.rab$l_fab = &uaf_fab;
4442 /* open the User Authorization File */
4443 status = SYS$OPEN (&uaf_fab);
4444 if (!(status&1))
4445 {
4446 errno = EVMSERR;
4447 vaxc$errno = status;
4448 return 0;
4449 }
4450 status = SYS$CONNECT (&uaf_rab);
4451 if (!(status&1))
4452 {
4453 errno = EVMSERR;
4454 vaxc$errno = status;
4455 return 0;
4456 }
4457 /* read the requested record - index is in uic */
4458 uaf_rab.rab$b_krf = 1; /* 1st alternate key */
4459 uaf_rab.rab$l_kbf = (char *) &uic;
4460 uaf_rab.rab$b_ksz = sizeof uic;
4461 uaf_rab.rab$b_rac = RAB$C_KEY;
4462 uaf_rab.rab$l_ubf = (char *)&retuaf;
4463 uaf_rab.rab$w_usz = sizeof retuaf;
4464 status = SYS$GET (&uaf_rab);
4465 if (!(status&1))
4466 {
4467 errno = EVMSERR;
4468 vaxc$errno = status;
4469 return 0;
4470 }
4471 /* close the User Authorization File */
4472 status = SYS$DISCONNECT (&uaf_rab);
4473 if (!(status&1))
4474 {
4475 errno = EVMSERR;
4476 vaxc$errno = status;
4477 return 0;
4478 }
4479 status = SYS$CLOSE (&uaf_fab);
4480 if (!(status&1))
4481 {
4482 errno = EVMSERR;
4483 vaxc$errno = status;
4484 return 0;
4485 }
4486 return &retuaf;
4487 }
4488
4489 static struct passwd retpw;
4490
4491 struct passwd *
4492 cnv_uaf_pw (up)
4493 struct UAF * up;
4494 {
4495 char * ptr;
4496
4497 /* copy these out first because if the username is 32 chars, the next
4498 section will overwrite the first byte of the UIC */
4499 retpw.pw_uid = up->uaf$w_mem;
4500 retpw.pw_gid = up->uaf$w_grp;
4501
4502 /* I suppose this is not the best sytle, to possibly overwrite one
4503 byte beyond the end of the field, but what the heck... */
4504 ptr = &up->uaf$t_username[UAF$S_USERNAME];
4505 while (ptr[-1] == ' ')
4506 ptr--;
4507 *ptr = '\0';
4508 strcpy (retpw.pw_name, up->uaf$t_username);
4509
4510 /* the rest of these are counted ascii strings */
4511 strncpy (retpw.pw_gecos, &up->uaf$t_owner[1], up->uaf$t_owner[0]);
4512 retpw.pw_gecos[up->uaf$t_owner[0]] = '\0';
4513 strncpy (retpw.pw_dir, &up->uaf$t_defdev[1], up->uaf$t_defdev[0]);
4514 retpw.pw_dir[up->uaf$t_defdev[0]] = '\0';
4515 strncat (retpw.pw_dir, &up->uaf$t_defdir[1], up->uaf$t_defdir[0]);
4516 retpw.pw_dir[up->uaf$t_defdev[0] + up->uaf$t_defdir[0]] = '\0';
4517 strncpy (retpw.pw_shell, &up->uaf$t_defcli[1], up->uaf$t_defcli[0]);
4518 retpw.pw_shell[up->uaf$t_defcli[0]] = '\0';
4519
4520 return &retpw;
4521 }
4522 #else /* not READ_SYSUAF */
4523 static struct passwd retpw;
4524 #endif /* not READ_SYSUAF */
4525
4526 struct passwd *
4527 getpwnam (name)
4528 char * name;
4529 {
4530 #ifdef READ_SYSUAF
4531 struct UAF *up;
4532 #else
4533 char * user;
4534 char * dir;
4535 unsigned char * full;
4536 #endif /* READ_SYSUAF */
4537 char *ptr = name;
4538
4539 while (*ptr)
4540 {
4541 if ('a' <= *ptr && *ptr <= 'z')
4542 *ptr -= 040;
4543 ptr++;
4544 }
4545 #ifdef READ_SYSUAF
4546 if (!(up = get_uaf_name (name)))
4547 return 0;
4548 return cnv_uaf_pw (up);
4549 #else
4550 if (strcmp (name, getenv ("USER")) == 0)
4551 {
4552 retpw.pw_uid = getuid ();
4553 retpw.pw_gid = getgid ();
4554 strcpy (retpw.pw_name, name);
4555 if (full = egetenv ("FULLNAME"))
4556 strcpy (retpw.pw_gecos, full);
4557 else
4558 *retpw.pw_gecos = '\0';
4559 strcpy (retpw.pw_dir, egetenv ("HOME"));
4560 *retpw.pw_shell = '\0';
4561 return &retpw;
4562 }
4563 else
4564 return 0;
4565 #endif /* not READ_SYSUAF */
4566 }
4567
4568 struct passwd *
4569 getpwuid (uid)
4570 unsigned long uid;
4571 {
4572 #ifdef READ_SYSUAF
4573 struct UAF * up;
4574
4575 if (!(up = get_uaf_uic (uid)))
4576 return 0;
4577 return cnv_uaf_pw (up);
4578 #else
4579 if (uid == sys_getuid ())
4580 return getpwnam (egetenv ("USER"));
4581 else
4582 return 0;
4583 #endif /* not READ_SYSUAF */
4584 }
4585
4586 /* return total address space available to the current process. This is
4587 the sum of the current p0 size, p1 size and free page table entries
4588 available. */
4589 vlimit ()
4590 {
4591 int item_code;
4592 unsigned long free_pages;
4593 unsigned long frep0va;
4594 unsigned long frep1va;
4595 register status;
4596
4597 item_code = JPI$_FREPTECNT;
4598 if (((status = LIB$GETJPI (&item_code, 0, 0, &free_pages)) & 1) == 0)
4599 {
4600 errno = EVMSERR;
4601 vaxc$errno = status;
4602 return -1;
4603 }
4604 free_pages *= 512;
4605
4606 item_code = JPI$_FREP0VA;
4607 if (((status = LIB$GETJPI (&item_code, 0, 0, &frep0va)) & 1) == 0)
4608 {
4609 errno = EVMSERR;
4610 vaxc$errno = status;
4611 return -1;
4612 }
4613 item_code = JPI$_FREP1VA;
4614 if (((status = LIB$GETJPI (&item_code, 0, 0, &frep1va)) & 1) == 0)
4615 {
4616 errno = EVMSERR;
4617 vaxc$errno = status;
4618 return -1;
4619 }
4620
4621 return free_pages + frep0va + (0x7fffffff - frep1va);
4622 }
4623
4624 define_logical_name (varname, string)
4625 char *varname;
4626 char *string;
4627 {
4628 struct dsc$descriptor_s strdsc =
4629 {strlen (string), DSC$K_DTYPE_T, DSC$K_CLASS_S, string};
4630 struct dsc$descriptor_s envdsc =
4631 {strlen (varname), DSC$K_DTYPE_T, DSC$K_CLASS_S, varname};
4632 struct dsc$descriptor_s lnmdsc =
4633 {7, DSC$K_DTYPE_T, DSC$K_CLASS_S, "LNM$JOB"};
4634
4635 return LIB$SET_LOGICAL (&envdsc, &strdsc, &lnmdsc, 0, 0);
4636 }
4637
4638 delete_logical_name (varname)
4639 char *varname;
4640 {
4641 struct dsc$descriptor_s envdsc =
4642 {strlen (varname), DSC$K_DTYPE_T, DSC$K_CLASS_S, varname};
4643 struct dsc$descriptor_s lnmdsc =
4644 {7, DSC$K_DTYPE_T, DSC$K_CLASS_S, "LNM$JOB"};
4645
4646 return LIB$DELETE_LOGICAL (&envdsc, &lnmdsc);
4647 }
4648
4649 ulimit ()
4650 {}
4651
4652 setpgrp ()
4653 {}
4654
4655 execvp ()
4656 {
4657 error ("execvp system call not implemented");
4658 }
4659
4660 int
4661 rename (from, to)
4662 char *from, *to;
4663 {
4664 int status;
4665 struct FAB from_fab = cc$rms_fab, to_fab = cc$rms_fab;
4666 struct NAM from_nam = cc$rms_nam, to_nam = cc$rms_nam;
4667 char from_esn[NAM$C_MAXRSS];
4668 char to_esn[NAM$C_MAXRSS];
4669
4670 from_fab.fab$l_fna = from;
4671 from_fab.fab$b_fns = strlen (from);
4672 from_fab.fab$l_nam = &from_nam;
4673 from_fab.fab$l_fop = FAB$M_NAM;
4674
4675 from_nam.nam$l_esa = from_esn;
4676 from_nam.nam$b_ess = sizeof from_esn;
4677
4678 to_fab.fab$l_fna = to;
4679 to_fab.fab$b_fns = strlen (to);
4680 to_fab.fab$l_nam = &to_nam;
4681 to_fab.fab$l_fop = FAB$M_NAM;
4682
4683 to_nam.nam$l_esa = to_esn;
4684 to_nam.nam$b_ess = sizeof to_esn;
4685
4686 status = SYS$RENAME (&from_fab, 0, 0, &to_fab);
4687
4688 if (status & 1)
4689 return 0;
4690 else
4691 {
4692 if (status == RMS$_DEV)
4693 errno = EXDEV;
4694 else
4695 errno = EVMSERR;
4696 vaxc$errno = status;
4697 return -1;
4698 }
4699 }
4700
4701 /* This function renames a file like `rename', but it strips
4702 the version number from the "to" filename, such that the "to" file is
4703 will always be a new version. It also sets the file protection once it is
4704 finished. The protection that we will use is stored in fab_final_pro,
4705 and was set when we did a creat_copy_attrs to create the file that we
4706 are renaming.
4707
4708 We could use the chmod function, but Eunichs uses 3 bits per user category
4709 to describe the protection, and VMS uses 4 (write and delete are separate
4710 bits). To maintain portability, the VMS implementation of `chmod' wires
4711 the W and D bits together. */
4712
4713
4714 static struct fibdef fib; /* We need this initialized to zero */
4715 char vms_file_written[NAM$C_MAXRSS];
4716
4717 int
4718 rename_sans_version (from,to)
4719 char *from, *to;
4720 {
4721 short int chan;
4722 int stat;
4723 short int iosb[4];
4724 int status;
4725 struct FAB to_fab = cc$rms_fab;
4726 struct NAM to_nam = cc$rms_nam;
4727 struct dsc$descriptor fib_d ={sizeof (fib),0,0,(char*) &fib};
4728 struct dsc$descriptor fib_attr[2]
4729 = {{sizeof (fab_final_pro),ATR$C_FPRO,0,(char*) &fab_final_pro},{0,0,0,0}};
4730 char to_esn[NAM$C_MAXRSS];
4731
4732 $DESCRIPTOR (disk,to_esn);
4733
4734 to_fab.fab$l_fna = to;
4735 to_fab.fab$b_fns = strlen (to);
4736 to_fab.fab$l_nam = &to_nam;
4737 to_fab.fab$l_fop = FAB$M_NAM;
4738
4739 to_nam.nam$l_esa = to_esn;
4740 to_nam.nam$b_ess = sizeof to_esn;
4741
4742 status = SYS$PARSE (&to_fab, 0, 0); /* figure out the full file name */
4743
4744 if (to_nam.nam$l_fnb && NAM$M_EXP_VER)
4745 *(to_nam.nam$l_ver) = '\0';
4746
4747 stat = rename (from, to_esn);
4748 if (stat < 0)
4749 return stat;
4750
4751 strcpy (vms_file_written, to_esn);
4752
4753 to_fab.fab$l_fna = vms_file_written; /* this points to the versionless name */
4754 to_fab.fab$b_fns = strlen (vms_file_written);
4755
4756 /* Now set the file protection to the correct value */
4757 SYS$OPEN (&to_fab, 0, 0); /* This fills in the nam$w_fid fields */
4758
4759 /* Copy these fields into the fib */
4760 fib.fib$r_fid_overlay.fib$w_fid[0] = to_nam.nam$w_fid[0];
4761 fib.fib$r_fid_overlay.fib$w_fid[1] = to_nam.nam$w_fid[1];
4762 fib.fib$r_fid_overlay.fib$w_fid[2] = to_nam.nam$w_fid[2];
4763
4764 SYS$CLOSE (&to_fab, 0, 0);
4765
4766 stat = SYS$ASSIGN (&disk, &chan, 0, 0); /* open a channel to the disk */
4767 if (!stat)
4768 LIB$SIGNAL (stat);
4769 stat = SYS$QIOW (0, chan, IO$_MODIFY, iosb, 0, 0, &fib_d,
4770 0, 0, 0, &fib_attr, 0);
4771 if (!stat)
4772 LIB$SIGNAL (stat);
4773 stat = SYS$DASSGN (chan);
4774 if (!stat)
4775 LIB$SIGNAL (stat);
4776 strcpy (vms_file_written, to_esn); /* We will write this to the terminal*/
4777 return 0;
4778 }
4779
4780 link (file, new)
4781 char * file, * new;
4782 {
4783 register status;
4784 struct FAB fab;
4785 struct NAM nam;
4786 unsigned short fid[3];
4787 char esa[NAM$C_MAXRSS];
4788
4789 fab = cc$rms_fab;
4790 fab.fab$l_fop = FAB$M_OFP;
4791 fab.fab$l_fna = file;
4792 fab.fab$b_fns = strlen (file);
4793 fab.fab$l_nam = &nam;
4794
4795 nam = cc$rms_nam;
4796 nam.nam$l_esa = esa;
4797 nam.nam$b_ess = NAM$C_MAXRSS;
4798
4799 status = SYS$PARSE (&fab);
4800 if ((status & 1) == 0)
4801 {
4802 errno = EVMSERR;
4803 vaxc$errno = status;
4804 return -1;
4805 }
4806 status = SYS$SEARCH (&fab);
4807 if ((status & 1) == 0)
4808 {
4809 errno = EVMSERR;
4810 vaxc$errno = status;
4811 return -1;
4812 }
4813
4814 fid[0] = nam.nam$w_fid[0];
4815 fid[1] = nam.nam$w_fid[1];
4816 fid[2] = nam.nam$w_fid[2];
4817
4818 fab.fab$l_fna = new;
4819 fab.fab$b_fns = strlen (new);
4820
4821 status = SYS$PARSE (&fab);
4822 if ((status & 1) == 0)
4823 {
4824 errno = EVMSERR;
4825 vaxc$errno = status;
4826 return -1;
4827 }
4828
4829 nam.nam$w_fid[0] = fid[0];
4830 nam.nam$w_fid[1] = fid[1];
4831 nam.nam$w_fid[2] = fid[2];
4832
4833 nam.nam$l_esa = nam.nam$l_name;
4834 nam.nam$b_esl = nam.nam$b_name + nam.nam$b_type + nam.nam$b_ver;
4835
4836 status = SYS$ENTER (&fab);
4837 if ((status & 1) == 0)
4838 {
4839 errno = EVMSERR;
4840 vaxc$errno = status;
4841 return -1;
4842 }
4843
4844 return 0;
4845 }
4846
4847 croak (badfunc)
4848 char *badfunc;
4849 {
4850 printf ("%s not yet implemented\r\n", badfunc);
4851 reset_sys_modes ();
4852 exit (1);
4853 }
4854
4855 long
4856 random ()
4857 {
4858 /* Arrange to return a range centered on zero. */
4859 return rand () - (1 << 30);
4860 }
4861
4862 srandom (seed)
4863 {
4864 srand (seed);
4865 }
4866 #endif /* VMS */
4867 \f
4868 #ifdef AIXHFT
4869
4870 /* Called from init_sys_modes. */
4871 hft_init ()
4872 {
4873 int junk;
4874
4875 /* If we're not on an HFT we shouldn't do any of this. We determine
4876 if we are on an HFT by trying to get an HFT error code. If this
4877 call fails, we're not on an HFT. */
4878 #ifdef IBMR2AIX
4879 if (ioctl (0, HFQERROR, &junk) < 0)
4880 return;
4881 #else /* not IBMR2AIX */
4882 if (ioctl (0, HFQEIO, 0) < 0)
4883 return;
4884 #endif /* not IBMR2AIX */
4885
4886 /* On AIX the default hft keyboard mapping uses backspace rather than delete
4887 as the rubout key's ASCII code. Here this is changed. The bug is that
4888 there's no way to determine the old mapping, so in reset_sys_modes
4889 we need to assume that the normal map had been present. Of course, this
4890 code also doesn't help if on a terminal emulator which doesn't understand
4891 HFT VTD's. */
4892 {
4893 struct hfbuf buf;
4894 struct hfkeymap keymap;
4895
4896 buf.hf_bufp = (char *)&keymap;
4897 buf.hf_buflen = sizeof (keymap);
4898 keymap.hf_nkeys = 2;
4899 keymap.hfkey[0].hf_kpos = 15;
4900 keymap.hfkey[0].hf_kstate = HFMAPCHAR | HFSHFNONE;
4901 #ifdef IBMR2AIX
4902 keymap.hfkey[0].hf_keyidh = '<';
4903 #else /* not IBMR2AIX */
4904 keymap.hfkey[0].hf_page = '<';
4905 #endif /* not IBMR2AIX */
4906 keymap.hfkey[0].hf_char = 127;
4907 keymap.hfkey[1].hf_kpos = 15;
4908 keymap.hfkey[1].hf_kstate = HFMAPCHAR | HFSHFSHFT;
4909 #ifdef IBMR2AIX
4910 keymap.hfkey[1].hf_keyidh = '<';
4911 #else /* not IBMR2AIX */
4912 keymap.hfkey[1].hf_page = '<';
4913 #endif /* not IBMR2AIX */
4914 keymap.hfkey[1].hf_char = 127;
4915 hftctl (0, HFSKBD, &buf);
4916 }
4917 /* The HFT system on AIX doesn't optimize for scrolling, so it's really ugly
4918 at times. */
4919 line_ins_del_ok = char_ins_del_ok = 0;
4920 }
4921
4922 /* Reset the rubout key to backspace. */
4923
4924 hft_reset ()
4925 {
4926 struct hfbuf buf;
4927 struct hfkeymap keymap;
4928 int junk;
4929
4930 #ifdef IBMR2AIX
4931 if (ioctl (0, HFQERROR, &junk) < 0)
4932 return;
4933 #else /* not IBMR2AIX */
4934 if (ioctl (0, HFQEIO, 0) < 0)
4935 return;
4936 #endif /* not IBMR2AIX */
4937
4938 buf.hf_bufp = (char *)&keymap;
4939 buf.hf_buflen = sizeof (keymap);
4940 keymap.hf_nkeys = 2;
4941 keymap.hfkey[0].hf_kpos = 15;
4942 keymap.hfkey[0].hf_kstate = HFMAPCHAR | HFSHFNONE;
4943 #ifdef IBMR2AIX
4944 keymap.hfkey[0].hf_keyidh = '<';
4945 #else /* not IBMR2AIX */
4946 keymap.hfkey[0].hf_page = '<';
4947 #endif /* not IBMR2AIX */
4948 keymap.hfkey[0].hf_char = 8;
4949 keymap.hfkey[1].hf_kpos = 15;
4950 keymap.hfkey[1].hf_kstate = HFMAPCHAR | HFSHFSHFT;
4951 #ifdef IBMR2AIX
4952 keymap.hfkey[1].hf_keyidh = '<';
4953 #else /* not IBMR2AIX */
4954 keymap.hfkey[1].hf_page = '<';
4955 #endif /* not IBMR2AIX */
4956 keymap.hfkey[1].hf_char = 8;
4957 hftctl (0, HFSKBD, &buf);
4958 }
4959
4960 #endif /* AIXHFT */
4961
4962 #ifdef USE_DL_STUBS
4963
4964 /* These are included on Sunos 4.1 when we do not use shared libraries.
4965 X11 libraries may refer to these functions but (we hope) do not
4966 actually call them. */
4967
4968 void *
4969 dlopen ()
4970 {
4971 return 0;
4972 }
4973
4974 void *
4975 dlsym ()
4976 {
4977 return 0;
4978 }
4979
4980 int
4981 dlclose ()
4982 {
4983 return -1;
4984 }
4985
4986 #endif /* USE_DL_STUBS */
4987
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