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(toplevel): Include systime.h and atimer.h.
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1/* Interfaces to system-dependent kernel and library entries.
2 Copyright (C) 1985, 86,87,88,93,94,95, 1999 Free Software Foundation, Inc.
3
4This file is part of GNU Emacs.
5
6GNU Emacs is free software; you can redistribute it and/or modify
7it under the terms of the GNU General Public License as published by
8the Free Software Foundation; either version 2, or (at your option)
9any later version.
10
11GNU Emacs is distributed in the hope that it will be useful,
12but WITHOUT ANY WARRANTY; without even the implied warranty of
13MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14GNU General Public License for more details.
15
16You should have received a copy of the GNU General Public License
17along with GNU Emacs; see the file COPYING. If not, write to
18the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19Boston, MA 02111-1307, USA. */
20
21
22#include <config.h>
23#include <signal.h>
24#include <setjmp.h>
25
26#include "lisp.h"
27#include "blockinput.h"
28#undef NULL
29
30#ifdef macintosh
31#ifdef __MRC__
32__sigfun sys_signal (int signal, __sigfun signal_func);
33#elif __MWERKS__
34__signal_func_ptr sys_signal (int signal, __signal_func_ptr signal_func);
35#else
36You lose!!!
37#endif
38#ifndef subprocesses
39/* Nonzero means delete a process right away if it exits (process.c). */
40static int delete_exited_processes;
41#endif
42#ifndef HAVE_X_WINDOWS
43/* Search path for bitmap files (xfns.c). */
44Lisp_Object Vx_bitmap_file_path;
45#endif
46#endif /* macintosh */
47
48#define min(x,y) ((x) > (y) ? (y) : (x))
49
50#ifdef WINDOWSNT
51#define read _read
52#define write _write
53#include <windows.h>
54extern int errno;
55#endif /* not WINDOWSNT */
56
57/* Does anyone other than VMS need this? */
58#ifndef fwrite
59#define sys_fwrite fwrite
60#else
61#undef fwrite
62#endif
63
64#ifndef HAVE_H_ERRNO
65extern int h_errno;
66#endif
67
68#include <stdio.h>
69#include <sys/types.h>
70#include <sys/stat.h>
71#include <errno.h>
72
73/* Get _POSIX_VDISABLE, if it is available. */
74#ifdef HAVE_UNISTD_H
75#include <unistd.h>
76#endif
77
78/* Get SI_SRPC_DOMAIN, if it is available. */
79#ifdef HAVE_SYS_SYSTEMINFO_H
80#include <sys/systeminfo.h>
81#endif
82
83#ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida, MW Aug 1993 */
84#include <dos.h>
85#include "dosfns.h"
86#include "msdos.h"
87#include <sys/param.h>
88
89#if __DJGPP__ > 1
90extern int etext;
91extern unsigned start __asm__ ("start");
92#endif
93#endif
94
95#ifndef errno
96extern int errno;
97#endif
98
99#ifdef VMS
100#include <rms.h>
101#include <ttdef.h>
102#include <tt2def.h>
103#include <iodef.h>
104#include <ssdef.h>
105#include <descrip.h>
106#include <fibdef.h>
107#include <atrdef.h>
108#include <ctype.h>
109#include <string.h>
110#ifdef __GNUC__
111#include <sys/file.h>
112#else
113#include <file.h>
114#endif
115#undef F_SETFL
116#ifndef RAB$C_BID
117#include <rab.h>
118#endif
119#define MAXIOSIZE (32 * PAGESIZE) /* Don't I/O more than 32 blocks at a time */
120#endif /* VMS */
121
122#ifndef BSD4_1
123#ifdef BSD_SYSTEM /* avoid writing defined (BSD_SYSTEM) || defined (USG)
124 because the vms compiler doesn't grok `defined' */
125#include <fcntl.h>
126#endif
127#ifdef USG
128#ifndef USG5
129#include <fcntl.h>
130#endif
131#endif
132#endif /* not 4.1 bsd */
133
134#ifndef MSDOS
135#include <sys/ioctl.h>
136#endif
137
138#include "systty.h"
139#include "syswait.h"
140
141#ifdef BROKEN_TIOCGWINSZ
142#undef TIOCGWINSZ
143#undef TIOCSWINSZ
144#endif
145
146#if defined (USG) || defined (DGUX)
147#include <sys/utsname.h>
148#include <string.h>
149#ifndef MEMORY_IN_STRING_H
150#include <memory.h>
151#endif
152#if defined (TIOCGWINSZ) || defined (ISC4_0)
153#ifdef NEED_SIOCTL
154#include <sys/sioctl.h>
155#endif
156#ifdef NEED_PTEM_H
157#include <sys/stream.h>
158#include <sys/ptem.h>
159#endif
160#endif /* TIOCGWINSZ or ISC4_0 */
161#endif /* USG or DGUX */
162
163extern int quit_char;
164
165#include "frame.h"
166#include "window.h"
167#include "termhooks.h"
168#include "termchar.h"
169#include "termopts.h"
170#include "dispextern.h"
171#include "process.h"
172
173#ifdef WINDOWSNT
174#include <direct.h>
175/* In process.h which conflicts with the local copy. */
176#define _P_WAIT 0
177int _CRTAPI1 _spawnlp (int, const char *, const char *, ...);
178int _CRTAPI1 _getpid (void);
179#endif
180
181#ifdef NONSYSTEM_DIR_LIBRARY
182#include "ndir.h"
183#endif /* NONSYSTEM_DIR_LIBRARY */
184
185#include "syssignal.h"
186#include "systime.h"
187#ifdef HAVE_UTIME_H
188#include <utime.h>
189#endif
190
191#ifndef HAVE_UTIMES
192#ifndef HAVE_STRUCT_UTIMBUF
193/* We want to use utime rather than utimes, but we couldn't find the
194 structure declaration. We'll use the traditional one. */
195struct utimbuf {
196 long actime;
197 long modtime;
198};
199#endif
200#endif
201
202#ifndef VFORK_RETURN_TYPE
203#define VFORK_RETURN_TYPE int
204#endif
205
206/* LPASS8 is new in 4.3, and makes cbreak mode provide all 8 bits. */
207#ifndef LPASS8
208#define LPASS8 0
209#endif
210
211#ifdef BSD4_1
212#define LNOFLSH 0100000
213#endif
214
215static int baud_convert[] =
216#ifdef BAUD_CONVERT
217 BAUD_CONVERT;
218#else
219 {
220 0, 50, 75, 110, 135, 150, 200, 300, 600, 1200,
221 1800, 2400, 4800, 9600, 19200, 38400
222 };
223#endif
224
225#if defined (HAVE_LIBNCURSES) && ! defined (NCURSES_OSPEED_T)
226extern short ospeed;
227#else
228#if defined (HAVE_TERMIOS_H) && defined (LINUX)
229#include <termios.h>
230/* HJL's version of libc is said to need this on the Alpha.
231 On the other hand, DEC OSF1 on the Alpha needs ospeed to be a short. */
232extern speed_t ospeed;
233#else
234extern short ospeed;
235#endif
236#endif
237
238/* The file descriptor for Emacs's input terminal.
239 Under Unix, this is normally zero except when using X;
240 under VMS, we place the input channel number here. */
241int input_fd;
242
243void croak P_ ((char *));
244
245#ifdef AIXHFT
246void hft_init ();
247void hft_reset ();
248#endif
249
250\f
251/* Specify a different file descriptor for further input operations. */
252
253void
254change_input_fd (fd)
255 int fd;
256{
257 input_fd = fd;
258}
259
260/* Discard pending input on descriptor input_fd. */
261
262void
263discard_tty_input ()
264{
265#ifndef WINDOWSNT
266 struct emacs_tty buf;
267
268 if (noninteractive)
269 return;
270
271 /* Discarding input is not safe when the input could contain
272 replies from the X server. So don't do it. */
273 if (read_socket_hook)
274 return;
275
276#ifdef VMS
277 end_kbd_input ();
278 SYS$QIOW (0, input_fd, IO$_READVBLK|IO$M_PURGE, input_iosb, 0, 0,
279 &buf.main, 0, 0, terminator_mask, 0, 0);
280 queue_kbd_input ();
281#else /* not VMS */
282#ifdef APOLLO
283 {
284 int zero = 0;
285 ioctl (input_fd, TIOCFLUSH, &zero);
286 }
287#else /* not Apollo */
288#ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */
289 while (dos_keyread () != -1)
290 ;
291#else /* not MSDOS */
292 EMACS_GET_TTY (input_fd, &buf);
293 EMACS_SET_TTY (input_fd, &buf, 0);
294#endif /* not MSDOS */
295#endif /* not Apollo */
296#endif /* not VMS */
297#endif /* not WINDOWSNT */
298}
299
300#ifdef SIGTSTP
301
302/* Arrange for character C to be read as the next input from
303 the terminal. */
304
305void
306stuff_char (c)
307 char c;
308{
309 if (read_socket_hook)
310 return;
311
312/* Should perhaps error if in batch mode */
313#ifdef TIOCSTI
314 ioctl (input_fd, TIOCSTI, &c);
315#else /* no TIOCSTI */
316 error ("Cannot stuff terminal input characters in this version of Unix");
317#endif /* no TIOCSTI */
318}
319
320#endif /* SIGTSTP */
321\f
322void
323init_baud_rate ()
324{
325 if (noninteractive)
326 ospeed = 0;
327 else
328 {
329#ifdef INIT_BAUD_RATE
330 INIT_BAUD_RATE ();
331#else
332#ifdef DOS_NT
333 ospeed = 15;
334#else /* not DOS_NT */
335#ifdef VMS
336 struct sensemode sg;
337
338 SYS$QIOW (0, input_fd, IO$_SENSEMODE, &sg, 0, 0,
339 &sg.class, 12, 0, 0, 0, 0 );
340 ospeed = sg.xmit_baud;
341#else /* not VMS */
342#ifdef HAVE_TERMIOS
343 struct termios sg;
344
345 sg.c_cflag = B9600;
346 tcgetattr (input_fd, &sg);
347 ospeed = cfgetospeed (&sg);
348#if defined (USE_GETOBAUD) && defined (getobaud)
349 /* m88k-motorola-sysv3 needs this (ghazi@noc.rutgers.edu) 9/1/94. */
350 if (ospeed == 0)
351 ospeed = getobaud (sg.c_cflag);
352#endif
353#else /* neither VMS nor TERMIOS */
354#ifdef HAVE_TERMIO
355 struct termio sg;
356
357 sg.c_cflag = B9600;
358#ifdef HAVE_TCATTR
359 tcgetattr (input_fd, &sg);
360#else
361 ioctl (input_fd, TCGETA, &sg);
362#endif
363 ospeed = sg.c_cflag & CBAUD;
364#else /* neither VMS nor TERMIOS nor TERMIO */
365 struct sgttyb sg;
366
367 sg.sg_ospeed = B9600;
368 if (ioctl (input_fd, TIOCGETP, &sg) < 0)
369 abort ();
370 ospeed = sg.sg_ospeed;
371#endif /* not HAVE_TERMIO */
372#endif /* not HAVE_TERMIOS */
373#endif /* not VMS */
374#endif /* not DOS_NT */
375#endif /* not INIT_BAUD_RATE */
376 }
377
378 baud_rate = (ospeed < sizeof baud_convert / sizeof baud_convert[0]
379 ? baud_convert[ospeed] : 9600);
380 if (baud_rate == 0)
381 baud_rate = 1200;
382}
383
384/*ARGSUSED*/
385void
386set_exclusive_use (fd)
387 int fd;
388{
389#ifdef FIOCLEX
390 ioctl (fd, FIOCLEX, 0);
391#endif
392 /* Ok to do nothing if this feature does not exist */
393}
394\f
395#ifndef subprocesses
396
397wait_without_blocking ()
398{
399#ifdef BSD_SYSTEM
400 wait3 (0, WNOHANG | WUNTRACED, 0);
401#else
402 croak ("wait_without_blocking");
403#endif
404 synch_process_alive = 0;
405}
406
407#endif /* not subprocesses */
408
409int wait_debugging; /* Set nonzero to make following function work under dbx
410 (at least for bsd). */
411
412SIGTYPE
413wait_for_termination_signal ()
414{}
415
416/* Wait for subprocess with process id `pid' to terminate and
417 make sure it will get eliminated (not remain forever as a zombie) */
418
419void
420wait_for_termination (pid)
421 int pid;
422{
423 while (1)
424 {
425#ifdef subprocesses
426#ifdef VMS
427 int status;
428
429 status = SYS$FORCEX (&pid, 0, 0);
430 break;
431#else /* not VMS */
432#if defined (BSD_SYSTEM) || (defined (HPUX) && !defined (HPUX_5))
433 /* Note that kill returns -1 even if the process is just a zombie now.
434 But inevitably a SIGCHLD interrupt should be generated
435 and child_sig will do wait3 and make the process go away. */
436 /* There is some indication that there is a bug involved with
437 termination of subprocesses, perhaps involving a kernel bug too,
438 but no idea what it is. Just as a hunch we signal SIGCHLD to see
439 if that causes the problem to go away or get worse. */
440 sigsetmask (sigmask (SIGCHLD));
441 if (0 > kill (pid, 0))
442 {
443 sigsetmask (SIGEMPTYMASK);
444 kill (getpid (), SIGCHLD);
445 break;
446 }
447 if (wait_debugging)
448 sleep (1);
449 else
450 sigpause (SIGEMPTYMASK);
451#else /* not BSD_SYSTEM, and not HPUX version >= 6 */
452#if defined (UNIPLUS)
453 if (0 > kill (pid, 0))
454 break;
455 wait (0);
456#else /* neither BSD_SYSTEM nor UNIPLUS: random sysV */
457#ifdef POSIX_SIGNALS /* would this work for LINUX as well? */
458 sigblock (sigmask (SIGCHLD));
459 if (0 > kill (pid, 0))
460 {
461 sigunblock (sigmask (SIGCHLD));
462 break;
463 }
464 sigpause (SIGEMPTYMASK);
465#else /* not POSIX_SIGNALS */
466#ifdef HAVE_SYSV_SIGPAUSE
467 sighold (SIGCHLD);
468 if (0 > kill (pid, 0))
469 {
470 sigrelse (SIGCHLD);
471 break;
472 }
473 sigpause (SIGCHLD);
474#else /* not HAVE_SYSV_SIGPAUSE */
475#ifdef WINDOWSNT
476 wait (0);
477 break;
478#else /* not WINDOWSNT */
479 if (0 > kill (pid, 0))
480 break;
481 /* Using sleep instead of pause avoids timing error.
482 If the inferior dies just before the sleep,
483 we lose just one second. */
484 sleep (1);
485#endif /* not WINDOWSNT */
486#endif /* not HAVE_SYSV_SIGPAUSE */
487#endif /* not POSIX_SIGNALS */
488#endif /* not UNIPLUS */
489#endif /* not BSD_SYSTEM, and not HPUX version >= 6 */
490#endif /* not VMS */
491#else /* not subprocesses */
492#if __DJGPP__ > 1
493 break;
494#else /* not __DJGPP__ > 1 */
495#ifndef BSD4_1
496 if (kill (pid, 0) < 0)
497 break;
498 wait (0);
499#else /* BSD4_1 */
500 int status;
501 status = wait (0);
502 if (status == pid || status == -1)
503 break;
504#endif /* BSD4_1 */
505#endif /* not __DJGPP__ > 1*/
506#endif /* not subprocesses */
507 }
508}
509
510#ifdef subprocesses
511
512/*
513 * flush any pending output
514 * (may flush input as well; it does not matter the way we use it)
515 */
516
517void
518flush_pending_output (channel)
519 int channel;
520{
521#ifdef HAVE_TERMIOS
522 /* If we try this, we get hit with SIGTTIN, because
523 the child's tty belongs to the child's pgrp. */
524#else
525#ifdef TCFLSH
526 ioctl (channel, TCFLSH, 1);
527#else
528#ifdef TIOCFLUSH
529 int zero = 0;
530 /* 3rd arg should be ignored
531 but some 4.2 kernels actually want the address of an int
532 and nonzero means something different. */
533 ioctl (channel, TIOCFLUSH, &zero);
534#endif
535#endif
536#endif
537}
538\f
539#ifndef VMS
540/* Set up the terminal at the other end of a pseudo-terminal that
541 we will be controlling an inferior through.
542 It should not echo or do line-editing, since that is done
543 in Emacs. No padding needed for insertion into an Emacs buffer. */
544
545void
546child_setup_tty (out)
547 int out;
548{
549#ifndef DOS_NT
550 struct emacs_tty s;
551
552 EMACS_GET_TTY (out, &s);
553
554#if defined (HAVE_TERMIO) || defined (HAVE_TERMIOS)
555 s.main.c_oflag |= OPOST; /* Enable output postprocessing */
556 s.main.c_oflag &= ~ONLCR; /* Disable map of NL to CR-NL on output */
557#ifdef NLDLY
558 s.main.c_oflag &= ~(NLDLY|CRDLY|TABDLY|BSDLY|VTDLY|FFDLY);
559 /* No output delays */
560#endif
561 s.main.c_lflag &= ~ECHO; /* Disable echo */
562 s.main.c_lflag |= ISIG; /* Enable signals */
563#ifdef IUCLC
564 s.main.c_iflag &= ~IUCLC; /* Disable downcasing on input. */
565#endif
566#ifdef ISTRIP
567 s.main.c_iflag &= ~ISTRIP; /* don't strip 8th bit on input */
568#endif
569#ifdef OLCUC
570 s.main.c_oflag &= ~OLCUC; /* Disable upcasing on output. */
571#endif
572 s.main.c_oflag &= ~TAB3; /* Disable tab expansion */
573 s.main.c_cflag = (s.main.c_cflag & ~CSIZE) | CS8; /* Don't strip 8th bit */
574#if 0
575 /* Said to be unnecessary: */
576 s.main.c_cc[VMIN] = 1; /* minimum number of characters to accept */
577 s.main.c_cc[VTIME] = 0; /* wait forever for at least 1 character */
578#endif
579
580 s.main.c_lflag |= ICANON; /* Enable erase/kill and eof processing */
581 s.main.c_cc[VEOF] = 04; /* insure that EOF is Control-D */
582 s.main.c_cc[VERASE] = CDISABLE; /* disable erase processing */
583 s.main.c_cc[VKILL] = CDISABLE; /* disable kill processing */
584
585#ifdef HPUX
586 s.main.c_cflag = (s.main.c_cflag & ~CBAUD) | B9600; /* baud rate sanity */
587#endif /* HPUX */
588
589#ifdef AIX
590/* AIX enhanced edit loses NULs, so disable it */
591#ifndef IBMR2AIX
592 s.main.c_line = 0;
593 s.main.c_iflag &= ~ASCEDIT;
594#endif
595 /* Also, PTY overloads NUL and BREAK.
596 don't ignore break, but don't signal either, so it looks like NUL. */
597 s.main.c_iflag &= ~IGNBRK;
598 s.main.c_iflag &= ~BRKINT;
599 /* QUIT and INTR work better as signals, so disable character forms */
600 s.main.c_cc[VINTR] = 0377;
601#ifdef SIGNALS_VIA_CHARACTERS
602 /* the QUIT and INTR character are used in process_send_signal
603 so set them here to something useful. */
604 if (s.main.c_cc[VQUIT] == 0377)
605 s.main.c_cc[VQUIT] = '\\'&037; /* Control-\ */
606 if (s.main.c_cc[VINTR] == 0377)
607 s.main.c_cc[VINTR] = 'C'&037; /* Control-C */
608#else /* no TIOCGPGRP or no TIOCGLTC or no TIOCGETC */
609 /* QUIT and INTR work better as signals, so disable character forms */
610 s.main.c_cc[VQUIT] = 0377;
611 s.main.c_cc[VINTR] = 0377;
612 s.main.c_lflag &= ~ISIG;
613#endif /* no TIOCGPGRP or no TIOCGLTC or no TIOCGETC */
614 s.main.c_cc[VEOL] = 0377;
615 s.main.c_cflag = (s.main.c_cflag & ~CBAUD) | B9600; /* baud rate sanity */
616#endif /* AIX */
617
618#else /* not HAVE_TERMIO */
619
620 s.main.sg_flags &= ~(ECHO | CRMOD | ANYP | ALLDELAY | RAW | LCASE
621 | CBREAK | TANDEM);
622 s.main.sg_flags |= LPASS8;
623 s.main.sg_erase = 0377;
624 s.main.sg_kill = 0377;
625 s.lmode = LLITOUT | s.lmode; /* Don't strip 8th bit */
626
627#endif /* not HAVE_TERMIO */
628
629 EMACS_SET_TTY (out, &s, 0);
630
631#ifdef BSD4_1
632 if (interrupt_input)
633 reset_sigio ();
634#endif /* BSD4_1 */
635#ifdef RTU
636 {
637 int zero = 0;
638 ioctl (out, FIOASYNC, &zero);
639 }
640#endif /* RTU */
641#endif /* not DOS_NT */
642}
643#endif /* not VMS */
644
645#endif /* subprocesses */
646\f
647/* Record a signal code and the handler for it. */
648struct save_signal
649{
650 int code;
651 SIGTYPE (*handler) P_ ((int));
652};
653
654static void save_signal_handlers P_ ((struct save_signal *));
655static void restore_signal_handlers P_ ((struct save_signal *));
656
657/* Suspend the Emacs process; give terminal to its superior. */
658
659void
660sys_suspend ()
661{
662#ifdef VMS
663 /* "Foster" parentage allows emacs to return to a subprocess that attached
664 to the current emacs as a cheaper than starting a whole new process. This
665 is set up by KEPTEDITOR.COM. */
666 unsigned long parent_id, foster_parent_id;
667 char *fpid_string;
668
669 fpid_string = getenv ("EMACS_PARENT_PID");
670 if (fpid_string != NULL)
671 {
672 sscanf (fpid_string, "%x", &foster_parent_id);
673 if (foster_parent_id != 0)
674 parent_id = foster_parent_id;
675 else
676 parent_id = getppid ();
677 }
678 else
679 parent_id = getppid ();
680
681 xfree (fpid_string); /* On VMS, this was malloc'd */
682
683 if (parent_id && parent_id != 0xffffffff)
684 {
685 SIGTYPE (*oldsig)() = (int) signal (SIGINT, SIG_IGN);
686 int status = LIB$ATTACH (&parent_id) & 1;
687 signal (SIGINT, oldsig);
688 return status;
689 }
690 else
691 {
692 struct {
693 int l;
694 char *a;
695 } d_prompt;
696 d_prompt.l = sizeof ("Emacs: "); /* Our special prompt */
697 d_prompt.a = "Emacs: "; /* Just a reminder */
698 LIB$SPAWN (0, 0, 0, 0, 0, 0, 0, 0, 0, 0, &d_prompt, 0);
699 return 1;
700 }
701 return -1;
702#else
703#if defined (SIGTSTP) && !defined (MSDOS)
704
705 {
706 int pgrp = EMACS_GETPGRP (0);
707 EMACS_KILLPG (pgrp, SIGTSTP);
708 }
709
710#else /* No SIGTSTP */
711#ifdef USG_JOBCTRL /* If you don't know what this is don't mess with it */
712 ptrace (0, 0, 0, 0); /* set for ptrace - caught by csh */
713 kill (getpid (), SIGQUIT);
714
715#else /* No SIGTSTP or USG_JOBCTRL */
716
717/* On a system where suspending is not implemented,
718 instead fork a subshell and let it talk directly to the terminal
719 while we wait. */
720 sys_subshell ();
721
722#endif /* no USG_JOBCTRL */
723#endif /* no SIGTSTP */
724#endif /* not VMS */
725}
726
727/* Fork a subshell. */
728
729void
730sys_subshell ()
731{
732#ifdef macintosh
733 error ("Can't spawn subshell");
734#else
735#ifndef VMS
736#ifdef DOS_NT /* Demacs 1.1.2 91/10/20 Manabu Higashida */
737 int st;
738 char oldwd[MAXPATHLEN+1]; /* Fixed length is safe on MSDOS. */
739#endif
740 int pid;
741 struct save_signal saved_handlers[5];
742 Lisp_Object dir;
743 unsigned char *str = 0;
744 int len;
745
746 saved_handlers[0].code = SIGINT;
747 saved_handlers[1].code = SIGQUIT;
748 saved_handlers[2].code = SIGTERM;
749#ifdef SIGIO
750 saved_handlers[3].code = SIGIO;
751 saved_handlers[4].code = 0;
752#else
753 saved_handlers[3].code = 0;
754#endif
755
756 /* Mentioning current_buffer->buffer would mean including buffer.h,
757 which somehow wedges the hp compiler. So instead... */
758
759 dir = intern ("default-directory");
760 if (NILP (Fboundp (dir)))
761 goto xyzzy;
762 dir = Fsymbol_value (dir);
763 if (!STRINGP (dir))
764 goto xyzzy;
765
766 dir = expand_and_dir_to_file (Funhandled_file_name_directory (dir), Qnil);
767 str = (unsigned char *) alloca (XSTRING (dir)->size + 2);
768 len = XSTRING (dir)->size;
769 bcopy (XSTRING (dir)->data, str, len);
770 if (str[len - 1] != '/') str[len++] = '/';
771 str[len] = 0;
772 xyzzy:
773
774#ifdef DOS_NT
775 pid = 0;
776#if __DJGPP__ > 1
777 save_signal_handlers (saved_handlers);
778 synch_process_alive = 1;
779#endif /* __DJGPP__ > 1 */
780#else
781 pid = vfork ();
782 if (pid == -1)
783 error ("Can't spawn subshell");
784#endif
785
786 if (pid == 0)
787 {
788 char *sh = 0;
789
790#ifdef DOS_NT /* MW, Aug 1993 */
791 getwd (oldwd);
792 if (sh == 0)
793 sh = (char *) egetenv ("SUSPEND"); /* KFS, 1994-12-14 */
794#endif
795 if (sh == 0)
796 sh = (char *) egetenv ("SHELL");
797 if (sh == 0)
798 sh = "sh";
799
800 /* Use our buffer's default directory for the subshell. */
801 if (str)
802 chdir ((char *) str);
803
804#ifdef subprocesses
805 close_process_descs (); /* Close Emacs's pipes/ptys */
806#endif
807
808#ifdef SET_EMACS_PRIORITY
809 {
810 extern int emacs_priority;
811
812 if (emacs_priority < 0)
813 nice (-emacs_priority);
814 }
815#endif
816
817#ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */
818 st = system (sh);
819 chdir (oldwd);
820#if 0 /* This is also reported if last command executed in subshell failed, KFS */
821 if (st)
822 report_file_error ("Can't execute subshell", Fcons (build_string (sh), Qnil));
823#endif
824#else /* not MSDOS */
825#ifdef WINDOWSNT
826 /* Waits for process completion */
827 pid = _spawnlp (_P_WAIT, sh, sh, NULL);
828 chdir (oldwd);
829 if (pid == -1)
830 write (1, "Can't execute subshell", 22);
831#else /* not WINDOWSNT */
832 execlp (sh, sh, 0);
833 write (1, "Can't execute subshell", 22);
834 _exit (1);
835#endif /* not WINDOWSNT */
836#endif /* not MSDOS */
837 }
838
839 /* Do this now if we did not do it before. */
840#if !defined (MSDOS) || __DJGPP__ == 1
841 save_signal_handlers (saved_handlers);
842 synch_process_alive = 1;
843#endif
844
845#ifndef DOS_NT
846 wait_for_termination (pid);
847#endif
848 restore_signal_handlers (saved_handlers);
849 synch_process_alive = 0;
850#endif /* !VMS */
851#endif /* !macintosh */
852}
853
854static void
855save_signal_handlers (saved_handlers)
856 struct save_signal *saved_handlers;
857{
858 while (saved_handlers->code)
859 {
860 saved_handlers->handler
861 = (SIGTYPE (*) P_ ((int))) signal (saved_handlers->code, SIG_IGN);
862 saved_handlers++;
863 }
864}
865
866static void
867restore_signal_handlers (saved_handlers)
868 struct save_signal *saved_handlers;
869{
870 while (saved_handlers->code)
871 {
872 signal (saved_handlers->code, saved_handlers->handler);
873 saved_handlers++;
874 }
875}
876\f
877#ifdef F_SETFL
878
879int old_fcntl_flags;
880
881void
882init_sigio (fd)
883 int fd;
884{
885#ifdef FASYNC
886 old_fcntl_flags = fcntl (fd, F_GETFL, 0) & ~FASYNC;
887 fcntl (fd, F_SETFL, old_fcntl_flags | FASYNC);
888#endif
889 interrupts_deferred = 0;
890}
891
892void
893reset_sigio ()
894{
895 unrequest_sigio ();
896}
897
898#ifdef FASYNC /* F_SETFL does not imply existence of FASYNC */
899
900void
901request_sigio ()
902{
903 if (read_socket_hook)
904 return;
905
906#ifdef SIGWINCH
907 sigunblock (sigmask (SIGWINCH));
908#endif
909 fcntl (input_fd, F_SETFL, old_fcntl_flags | FASYNC);
910
911 interrupts_deferred = 0;
912}
913
914void
915unrequest_sigio ()
916{
917 if (read_socket_hook)
918 return;
919
920#ifdef SIGWINCH
921 sigblock (sigmask (SIGWINCH));
922#endif
923 fcntl (input_fd, F_SETFL, old_fcntl_flags);
924 interrupts_deferred = 1;
925}
926
927#else /* no FASYNC */
928#ifdef STRIDE /* Stride doesn't have FASYNC - use FIOASYNC */
929
930void
931request_sigio ()
932{
933 int on = 1;
934
935 if (read_socket_hook)
936 return;
937
938 ioctl (input_fd, FIOASYNC, &on);
939 interrupts_deferred = 0;
940}
941
942void
943unrequest_sigio ()
944{
945 int off = 0;
946
947 if (read_socket_hook)
948 return;
949
950 ioctl (input_fd, FIOASYNC, &off);
951 interrupts_deferred = 1;
952}
953
954#else /* not FASYNC, not STRIDE */
955
956#ifdef _CX_UX
957
958#include <termios.h>
959
960void
961request_sigio ()
962{
963 int on = 1;
964 sigset_t st;
965
966 if (read_socket_hook)
967 return;
968
969 sigemptyset (&st);
970 sigaddset (&st, SIGIO);
971 ioctl (input_fd, FIOASYNC, &on);
972 interrupts_deferred = 0;
973 sigprocmask (SIG_UNBLOCK, &st, (sigset_t *)0);
974}
975
976void
977unrequest_sigio ()
978{
979 int off = 0;
980
981 if (read_socket_hook)
982 return;
983
984 ioctl (input_fd, FIOASYNC, &off);
985 interrupts_deferred = 1;
986}
987
988#else /* ! _CX_UX */
989
990void
991request_sigio ()
992{
993 if (read_socket_hook)
994 return;
995
996 croak ("request_sigio");
997}
998
999void
1000unrequest_sigio ()
1001{
1002 if (read_socket_hook)
1003 return;
1004
1005 croak ("unrequest_sigio");
1006}
1007
1008#endif /* _CX_UX */
1009#endif /* STRIDE */
1010#endif /* FASYNC */
1011#endif /* F_SETFL */
1012\f
1013/* Saving and restoring the process group of Emacs's terminal. */
1014
1015#ifdef BSD_PGRPS
1016
1017/* The process group of which Emacs was a member when it initially
1018 started.
1019
1020 If Emacs was in its own process group (i.e. inherited_pgroup ==
1021 getpid ()), then we know we're running under a shell with job
1022 control (Emacs would never be run as part of a pipeline).
1023 Everything is fine.
1024
1025 If Emacs was not in its own process group, then we know we're
1026 running under a shell (or a caller) that doesn't know how to
1027 separate itself from Emacs (like sh). Emacs must be in its own
1028 process group in order to receive SIGIO correctly. In this
1029 situation, we put ourselves in our own pgroup, forcibly set the
1030 tty's pgroup to our pgroup, and make sure to restore and reinstate
1031 the tty's pgroup just like any other terminal setting. If
1032 inherited_group was not the tty's pgroup, then we'll get a
1033 SIGTTmumble when we try to change the tty's pgroup, and a CONT if
1034 it goes foreground in the future, which is what should happen. */
1035int inherited_pgroup;
1036
1037/* Split off the foreground process group to Emacs alone.
1038 When we are in the foreground, but not started in our own process
1039 group, redirect the TTY to point to our own process group. We need
1040 to be in our own process group to receive SIGIO properly. */
1041void
1042narrow_foreground_group ()
1043{
1044 int me = getpid ();
1045
1046 setpgrp (0, inherited_pgroup);
1047 if (inherited_pgroup != me)
1048 EMACS_SET_TTY_PGRP (input_fd, &me);
1049 setpgrp (0, me);
1050}
1051
1052/* Set the tty to our original foreground group. */
1053void
1054widen_foreground_group ()
1055{
1056 if (inherited_pgroup != getpid ())
1057 EMACS_SET_TTY_PGRP (input_fd, &inherited_pgroup);
1058 setpgrp (0, inherited_pgroup);
1059}
1060
1061#endif /* BSD_PGRPS */
1062\f
1063/* Getting and setting emacs_tty structures. */
1064
1065/* Set *TC to the parameters associated with the terminal FD.
1066 Return zero if all's well, or -1 if we ran into an error we
1067 couldn't deal with. */
1068int
1069emacs_get_tty (fd, settings)
1070 int fd;
1071 struct emacs_tty *settings;
1072{
1073 /* Retrieve the primary parameters - baud rate, character size, etcetera. */
1074#ifdef HAVE_TCATTR
1075 /* We have those nifty POSIX tcmumbleattr functions. */
1076 bzero (&settings->main, sizeof (settings->main));
1077 if (tcgetattr (fd, &settings->main) < 0)
1078 return -1;
1079
1080#else
1081#ifdef HAVE_TERMIO
1082 /* The SYSV-style interface? */
1083 if (ioctl (fd, TCGETA, &settings->main) < 0)
1084 return -1;
1085
1086#else
1087#ifdef VMS
1088 /* Vehemently Monstrous System? :-) */
1089 if (! (SYS$QIOW (0, fd, IO$_SENSEMODE, settings, 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, TIOCGETP, &settings->main) < 0)
1098 return -1;
1099#endif /* not DOS_NT */
1100#endif
1101#endif
1102#endif
1103
1104 /* Suivant - Do we have to get struct ltchars data? */
1105#ifdef HAVE_LTCHARS
1106 if (ioctl (fd, TIOCGLTC, &settings->ltchars) < 0)
1107 return -1;
1108#endif
1109
1110 /* How about a struct tchars and a wordful of lmode bits? */
1111#ifdef HAVE_TCHARS
1112 if (ioctl (fd, TIOCGETC, &settings->tchars) < 0
1113 || ioctl (fd, TIOCLGET, &settings->lmode) < 0)
1114 return -1;
1115#endif
1116
1117 /* We have survived the tempest. */
1118 return 0;
1119}
1120
1121
1122/* Set the parameters of the tty on FD according to the contents of
1123 *SETTINGS. If FLUSHP is non-zero, we discard input.
1124 Return 0 if all went well, and -1 if anything failed. */
1125
1126int
1127emacs_set_tty (fd, settings, flushp)
1128 int fd;
1129 struct emacs_tty *settings;
1130 int flushp;
1131{
1132 /* Set the primary parameters - baud rate, character size, etcetera. */
1133#ifdef HAVE_TCATTR
1134 int i;
1135 /* We have those nifty POSIX tcmumbleattr functions.
1136 William J. Smith <wjs@wiis.wang.com> writes:
1137 "POSIX 1003.1 defines tcsetattr to return success if it was
1138 able to perform any of the requested actions, even if some
1139 of the requested actions could not be performed.
1140 We must read settings back to ensure tty setup properly.
1141 AIX requires this to keep tty from hanging occasionally." */
1142 /* This make sure that we don't loop indefinitely in here. */
1143 for (i = 0 ; i < 10 ; i++)
1144 if (tcsetattr (fd, flushp ? TCSAFLUSH : TCSADRAIN, &settings->main) < 0)
1145 {
1146 if (errno == EINTR)
1147 continue;
1148 else
1149 return -1;
1150 }
1151 else
1152 {
1153 struct termios new;
1154
1155 bzero (&new, sizeof (new));
1156 /* Get the current settings, and see if they're what we asked for. */
1157 tcgetattr (fd, &new);
1158 /* We cannot use memcmp on the whole structure here because under
1159 * aix386 the termios structure has some reserved field that may
1160 * not be filled in.
1161 */
1162 if ( new.c_iflag == settings->main.c_iflag
1163 && new.c_oflag == settings->main.c_oflag
1164 && new.c_cflag == settings->main.c_cflag
1165 && new.c_lflag == settings->main.c_lflag
1166 && memcmp (new.c_cc, settings->main.c_cc, NCCS) == 0)
1167 break;
1168 else
1169 continue;
1170 }
1171
1172#else
1173#ifdef HAVE_TERMIO
1174 /* The SYSV-style interface? */
1175 if (ioctl (fd, flushp ? TCSETAF : TCSETAW, &settings->main) < 0)
1176 return -1;
1177
1178#else
1179#ifdef VMS
1180 /* Vehemently Monstrous System? :-) */
1181 if (! (SYS$QIOW (0, fd, IO$_SETMODE, &input_iosb, 0, 0,
1182 &settings->main.class, 12, 0, 0, 0, 0)
1183 & 1))
1184 return -1;
1185
1186#else
1187#ifndef DOS_NT
1188 /* I give up - I hope you have the BSD ioctls. */
1189 if (ioctl (fd, (flushp) ? TIOCSETP : TIOCSETN, &settings->main) < 0)
1190 return -1;
1191#endif /* not DOS_NT */
1192
1193#endif
1194#endif
1195#endif
1196
1197 /* Suivant - Do we have to get struct ltchars data? */
1198#ifdef HAVE_LTCHARS
1199 if (ioctl (fd, TIOCSLTC, &settings->ltchars) < 0)
1200 return -1;
1201#endif
1202
1203 /* How about a struct tchars and a wordful of lmode bits? */
1204#ifdef HAVE_TCHARS
1205 if (ioctl (fd, TIOCSETC, &settings->tchars) < 0
1206 || ioctl (fd, TIOCLSET, &settings->lmode) < 0)
1207 return -1;
1208#endif
1209
1210 /* We have survived the tempest. */
1211 return 0;
1212}
1213
1214\f
1215/* The initial tty mode bits */
1216struct emacs_tty old_tty;
1217
1218/* 1 if we have been through init_sys_modes. */
1219int term_initted;
1220
1221/* 1 if outer tty status has been recorded. */
1222int old_tty_valid;
1223
1224#ifdef BSD4_1
1225/* BSD 4.1 needs to keep track of the lmode bits in order to start
1226 sigio. */
1227int lmode;
1228#endif
1229
1230#ifndef F_SETOWN_BUG
1231#ifdef F_SETOWN
1232int old_fcntl_owner;
1233#endif /* F_SETOWN */
1234#endif /* F_SETOWN_BUG */
1235
1236/* This may also be defined in stdio,
1237 but if so, this does no harm,
1238 and using the same name avoids wasting the other one's space. */
1239
1240#ifdef nec_ews_svr4
1241extern char *_sobuf ;
1242#else
1243#if defined (USG) || defined (DGUX)
1244unsigned char _sobuf[BUFSIZ+8];
1245#else
1246char _sobuf[BUFSIZ];
1247#endif
1248#endif
1249
1250#ifdef HAVE_LTCHARS
1251static struct ltchars new_ltchars = {-1,-1,-1,-1,-1,-1};
1252#endif
1253#ifdef HAVE_TCHARS
1254static struct tchars new_tchars = {-1,-1,-1,-1,-1,-1};
1255#endif
1256
1257void
1258init_sys_modes ()
1259{
1260 struct emacs_tty tty;
1261
1262#ifdef macintosh
1263 Vwindow_system = intern ("mac");
1264 Vwindow_system_version = make_number (1);
1265
1266/* cus-start.el complains if delete-exited-processes and x-bitmap-file-path not defined */
1267#ifndef subprocesses
1268 DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes,
1269 "*Non-nil means delete processes immediately when they exit.\n\
1270nil means don't delete them until `list-processes' is run.");
1271 delete_exited_processes = 0;
1272#endif
1273
1274#ifndef HAVE_X_WINDOWS
1275 DEFVAR_LISP ("x-bitmap-file-path", &Vx_bitmap_file_path,
1276 "List of directories to search for bitmap files for X.");
1277 Vx_bitmap_file_path = decode_env_path ((char *) 0, ".");
1278#endif
1279
1280#endif /* not macintosh */
1281
1282#ifdef VMS
1283#if 0
1284 static int oob_chars[2] = {0, 1 << 7}; /* catch C-g's */
1285 extern int (*interrupt_signal) ();
1286#endif
1287#endif
1288
1289 Vtty_erase_char = Qnil;
1290
1291 if (noninteractive)
1292 return;
1293
1294#ifdef VMS
1295 if (!input_ef)
1296 input_ef = get_kbd_event_flag ();
1297 /* LIB$GET_EF (&input_ef); */
1298 SYS$CLREF (input_ef);
1299 waiting_for_ast = 0;
1300 if (!timer_ef)
1301 timer_ef = get_timer_event_flag ();
1302 /* LIB$GET_EF (&timer_ef); */
1303 SYS$CLREF (timer_ef);
1304#if 0
1305 if (!process_ef)
1306 {
1307 LIB$GET_EF (&process_ef);
1308 SYS$CLREF (process_ef);
1309 }
1310 if (input_ef / 32 != process_ef / 32)
1311 croak ("Input and process event flags in different clusters.");
1312#endif
1313 if (input_ef / 32 != timer_ef / 32)
1314 croak ("Input and timer event flags in different clusters.");
1315#if 0
1316 input_eflist = ((unsigned) 1 << (input_ef % 32)) |
1317 ((unsigned) 1 << (process_ef % 32));
1318#endif
1319 timer_eflist = ((unsigned) 1 << (input_ef % 32)) |
1320 ((unsigned) 1 << (timer_ef % 32));
1321#ifndef VMS4_4
1322 sys_access_reinit ();
1323#endif
1324#endif /* not VMS */
1325
1326#ifdef BSD_PGRPS
1327 if (! read_socket_hook && EQ (Vwindow_system, Qnil))
1328 narrow_foreground_group ();
1329#endif
1330
1331#ifdef HAVE_WINDOW_SYSTEM
1332 /* Emacs' window system on MSDOG uses the `internal terminal' and therefore
1333 needs the initialization code below. */
1334 if (!read_socket_hook && EQ (Vwindow_system, Qnil))
1335#endif
1336 {
1337 EMACS_GET_TTY (input_fd, &old_tty);
1338
1339 old_tty_valid = 1;
1340
1341 tty = old_tty;
1342
1343#if defined (HAVE_TERMIO) || defined (HAVE_TERMIOS)
1344 XSETINT (Vtty_erase_char, old_tty.main.c_cc[VERASE]);
1345
1346#ifdef DGUX
1347 /* This allows meta to be sent on 8th bit. */
1348 tty.main.c_iflag &= ~INPCK; /* don't check input for parity */
1349#endif
1350 tty.main.c_iflag |= (IGNBRK); /* Ignore break condition */
1351 tty.main.c_iflag &= ~ICRNL; /* Disable map of CR to NL on input */
1352#ifdef INLCR /* I'm just being cautious,
1353 since I can't check how widespread INLCR is--rms. */
1354 tty.main.c_iflag &= ~INLCR; /* Disable map of NL to CR on input */
1355#endif
1356#ifdef ISTRIP
1357 tty.main.c_iflag &= ~ISTRIP; /* don't strip 8th bit on input */
1358#endif
1359 tty.main.c_lflag &= ~ECHO; /* Disable echo */
1360 tty.main.c_lflag &= ~ICANON; /* Disable erase/kill processing */
1361#ifdef IEXTEN
1362 tty.main.c_lflag &= ~IEXTEN; /* Disable other editing characters. */
1363#endif
1364 tty.main.c_lflag |= ISIG; /* Enable signals */
1365 if (flow_control)
1366 {
1367 tty.main.c_iflag |= IXON; /* Enable start/stop output control */
1368#ifdef IXANY
1369 tty.main.c_iflag &= ~IXANY;
1370#endif /* IXANY */
1371 }
1372 else
1373 tty.main.c_iflag &= ~IXON; /* Disable start/stop output control */
1374 tty.main.c_oflag &= ~ONLCR; /* Disable map of NL to CR-NL
1375 on output */
1376 tty.main.c_oflag &= ~TAB3; /* Disable tab expansion */
1377#ifdef CS8
1378 if (meta_key)
1379 {
1380 tty.main.c_cflag |= CS8; /* allow 8th bit on input */
1381 tty.main.c_cflag &= ~PARENB;/* Don't check parity */
1382 }
1383#endif
1384 tty.main.c_cc[VINTR] = quit_char; /* C-g (usually) gives SIGINT */
1385 /* Set up C-g for both SIGQUIT and SIGINT.
1386 We don't know which we will get, but we handle both alike
1387 so which one it really gives us does not matter. */
1388 tty.main.c_cc[VQUIT] = quit_char;
1389 tty.main.c_cc[VMIN] = 1; /* Input should wait for at least 1 char */
1390 tty.main.c_cc[VTIME] = 0; /* no matter how long that takes. */
1391#ifdef VSWTCH
1392 tty.main.c_cc[VSWTCH] = CDISABLE; /* Turn off shell layering use
1393 of C-z */
1394#endif /* VSWTCH */
1395
1396#if defined (mips) || defined (HAVE_TCATTR)
1397#ifdef VSUSP
1398 tty.main.c_cc[VSUSP] = CDISABLE; /* Turn off mips handling of C-z. */
1399#endif /* VSUSP */
1400#ifdef V_DSUSP
1401 tty.main.c_cc[V_DSUSP] = CDISABLE; /* Turn off mips handling of C-y. */
1402#endif /* V_DSUSP */
1403#ifdef VDSUSP /* Some systems have VDSUSP, some have V_DSUSP. */
1404 tty.main.c_cc[VDSUSP] = CDISABLE;
1405#endif /* VDSUSP */
1406#ifdef VLNEXT
1407 tty.main.c_cc[VLNEXT] = CDISABLE;
1408#endif /* VLNEXT */
1409#ifdef VREPRINT
1410 tty.main.c_cc[VREPRINT] = CDISABLE;
1411#endif /* VREPRINT */
1412#ifdef VWERASE
1413 tty.main.c_cc[VWERASE] = CDISABLE;
1414#endif /* VWERASE */
1415#ifdef VDISCARD
1416 tty.main.c_cc[VDISCARD] = CDISABLE;
1417#endif /* VDISCARD */
1418
1419 if (flow_control)
1420 {
1421#ifdef VSTART
1422 tty.main.c_cc[VSTART] = '\021';
1423#endif /* VSTART */
1424#ifdef VSTOP
1425 tty.main.c_cc[VSTOP] = '\023';
1426#endif /* VSTOP */
1427 }
1428 else
1429 {
1430#ifdef VSTART
1431 tty.main.c_cc[VSTART] = CDISABLE;
1432#endif /* VSTART */
1433#ifdef VSTOP
1434 tty.main.c_cc[VSTOP] = CDISABLE;
1435#endif /* VSTOP */
1436 }
1437#endif /* mips or HAVE_TCATTR */
1438
1439#ifdef SET_LINE_DISCIPLINE
1440 /* Need to explicitly request TERMIODISC line discipline or
1441 Ultrix's termios does not work correctly. */
1442 tty.main.c_line = SET_LINE_DISCIPLINE;
1443#endif
1444#ifdef AIX
1445#ifndef IBMR2AIX
1446 /* AIX enhanced edit loses NULs, so disable it. */
1447 tty.main.c_line = 0;
1448 tty.main.c_iflag &= ~ASCEDIT;
1449#else
1450 tty.main.c_cc[VSTRT] = 255;
1451 tty.main.c_cc[VSTOP] = 255;
1452 tty.main.c_cc[VSUSP] = 255;
1453 tty.main.c_cc[VDSUSP] = 255;
1454#endif /* IBMR2AIX */
1455 if (flow_control)
1456 {
1457#ifdef VSTART
1458 tty.main.c_cc[VSTART] = '\021';
1459#endif /* VSTART */
1460#ifdef VSTOP
1461 tty.main.c_cc[VSTOP] = '\023';
1462#endif /* VSTOP */
1463 }
1464 /* Also, PTY overloads NUL and BREAK.
1465 don't ignore break, but don't signal either, so it looks like NUL.
1466 This really serves a purpose only if running in an XTERM window
1467 or via TELNET or the like, but does no harm elsewhere. */
1468 tty.main.c_iflag &= ~IGNBRK;
1469 tty.main.c_iflag &= ~BRKINT;
1470#endif
1471#else /* if not HAVE_TERMIO */
1472#ifdef VMS
1473 tty.main.tt_char |= TT$M_NOECHO;
1474 if (meta_key)
1475 tty.main.tt_char |= TT$M_EIGHTBIT;
1476 if (flow_control)
1477 tty.main.tt_char |= TT$M_TTSYNC;
1478 else
1479 tty.main.tt_char &= ~TT$M_TTSYNC;
1480 tty.main.tt2_char |= TT2$M_PASTHRU | TT2$M_XON;
1481#else /* not VMS (BSD, that is) */
1482#ifndef DOS_NT
1483 XSETINT (Vtty_erase_char, tty.main.sg_erase);
1484 tty.main.sg_flags &= ~(ECHO | CRMOD | XTABS);
1485 if (meta_key)
1486 tty.main.sg_flags |= ANYP;
1487 tty.main.sg_flags |= interrupt_input ? RAW : CBREAK;
1488#endif /* not DOS_NT */
1489#endif /* not VMS (BSD, that is) */
1490#endif /* not HAVE_TERMIO */
1491
1492 /* If going to use CBREAK mode, we must request C-g to interrupt
1493 and turn off start and stop chars, etc. If not going to use
1494 CBREAK mode, do this anyway so as to turn off local flow
1495 control for user coming over network on 4.2; in this case,
1496 only t_stopc and t_startc really matter. */
1497#ifndef HAVE_TERMIO
1498#ifdef HAVE_TCHARS
1499 /* Note: if not using CBREAK mode, it makes no difference how we
1500 set this */
1501 tty.tchars = new_tchars;
1502 tty.tchars.t_intrc = quit_char;
1503 if (flow_control)
1504 {
1505 tty.tchars.t_startc = '\021';
1506 tty.tchars.t_stopc = '\023';
1507 }
1508
1509 tty.lmode = LDECCTQ | LLITOUT | LPASS8 | LNOFLSH | old_tty.lmode;
1510#ifdef ultrix
1511 /* Under Ultrix 4.2a, leaving this out doesn't seem to hurt
1512 anything, and leaving it in breaks the meta key. Go figure. */
1513 tty.lmode &= ~LLITOUT;
1514#endif
1515
1516#ifdef BSD4_1
1517 lmode = tty.lmode;
1518#endif
1519
1520#endif /* HAVE_TCHARS */
1521#endif /* not HAVE_TERMIO */
1522
1523#ifdef HAVE_LTCHARS
1524 tty.ltchars = new_ltchars;
1525#endif /* HAVE_LTCHARS */
1526#ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida, MW Aug 1993 */
1527 if (!term_initted)
1528 internal_terminal_init ();
1529 dos_ttraw ();
1530#endif
1531
1532 EMACS_SET_TTY (input_fd, &tty, 0);
1533
1534 /* This code added to insure that, if flow-control is not to be used,
1535 we have an unlocked terminal at the start. */
1536
1537#ifdef TCXONC
1538 if (!flow_control) ioctl (input_fd, TCXONC, 1);
1539#endif
1540#ifndef APOLLO
1541#ifdef TIOCSTART
1542 if (!flow_control) ioctl (input_fd, TIOCSTART, 0);
1543#endif
1544#endif
1545
1546#if defined (HAVE_TERMIOS) || defined (HPUX9)
1547#ifdef TCOON
1548 if (!flow_control) tcflow (input_fd, TCOON);
1549#endif
1550#endif
1551
1552#ifdef AIXHFT
1553 hft_init ();
1554#ifdef IBMR2AIX
1555 {
1556 /* IBM's HFT device usually thinks a ^J should be LF/CR. We need it
1557 to be only LF. This is the way that is done. */
1558 struct termio tty;
1559
1560 if (ioctl (1, HFTGETID, &tty) != -1)
1561 write (1, "\033[20l", 5);
1562 }
1563#endif
1564#endif /* AIXHFT */
1565
1566#ifdef VMS
1567/* Appears to do nothing when in PASTHRU mode.
1568 SYS$QIOW (0, input_fd, IO$_SETMODE|IO$M_OUTBAND, 0, 0, 0,
1569 interrupt_signal, oob_chars, 0, 0, 0, 0);
1570*/
1571 queue_kbd_input (0);
1572#endif /* VMS */
1573 }
1574
1575#ifdef F_SETFL
1576#ifndef F_SETOWN_BUG
1577#ifdef F_GETOWN /* F_SETFL does not imply existence of F_GETOWN */
1578 if (interrupt_input
1579 && ! read_socket_hook && EQ (Vwindow_system, Qnil))
1580 {
1581 old_fcntl_owner = fcntl (input_fd, F_GETOWN, 0);
1582 fcntl (input_fd, F_SETOWN, getpid ());
1583 init_sigio (input_fd);
1584 }
1585#endif /* F_GETOWN */
1586#endif /* F_SETOWN_BUG */
1587#endif /* F_SETFL */
1588
1589#ifdef BSD4_1
1590 if (interrupt_input)
1591 init_sigio (input_fd);
1592#endif
1593
1594#ifdef VMS /* VMS sometimes has this symbol but lacks setvbuf. */
1595#undef _IOFBF
1596#endif
1597#ifdef _IOFBF
1598 /* This symbol is defined on recent USG systems.
1599 Someone says without this call USG won't really buffer the file
1600 even with a call to setbuf. */
1601 setvbuf (stdout, (char *) _sobuf, _IOFBF, sizeof _sobuf);
1602#else
1603 setbuf (stdout, (char *) _sobuf);
1604#endif
1605#ifdef HAVE_WINDOW_SYSTEM
1606 /* Emacs' window system on MSDOG uses the `internal terminal' and therefore
1607 needs the initialization code below. */
1608 if (EQ (Vwindow_system, Qnil)
1609#ifndef WINDOWSNT
1610 /* When running in tty mode on NT/Win95, we have a read_socket
1611 hook, but still need the rest of the initialization code below. */
1612 && (! read_socket_hook)
1613#endif
1614 )
1615#endif
1616 set_terminal_modes ();
1617
1618 if (!term_initted
1619 && FRAMEP (Vterminal_frame)
1620 && FRAME_TERMCAP_P (XFRAME (Vterminal_frame)))
1621 init_frame_faces (XFRAME (Vterminal_frame));
1622
1623 if (term_initted && no_redraw_on_reenter)
1624 {
1625 if (display_completed)
1626 direct_output_forward_char (0);
1627 }
1628 else
1629 {
1630 frame_garbaged = 1;
1631 if (FRAMEP (Vterminal_frame))
1632 FRAME_GARBAGED_P (XFRAME (Vterminal_frame)) = 1;
1633 }
1634
1635 term_initted = 1;
1636}
1637
1638/* Return nonzero if safe to use tabs in output.
1639 At the time this is called, init_sys_modes has not been done yet. */
1640
1641int
1642tabs_safe_p ()
1643{
1644 struct emacs_tty tty;
1645
1646 EMACS_GET_TTY (input_fd, &tty);
1647 return EMACS_TTY_TABS_OK (&tty);
1648}
1649\f
1650/* Get terminal size from system.
1651 Store number of lines into *HEIGHTP and width into *WIDTHP.
1652 We store 0 if there's no valid information. */
1653
1654void
1655get_frame_size (widthp, heightp)
1656 int *widthp, *heightp;
1657{
1658
1659#ifdef TIOCGWINSZ
1660
1661 /* BSD-style. */
1662 struct winsize size;
1663
1664 if (ioctl (input_fd, TIOCGWINSZ, &size) == -1)
1665 *widthp = *heightp = 0;
1666 else
1667 {
1668 *widthp = size.ws_col;
1669 *heightp = size.ws_row;
1670 }
1671
1672#else
1673#ifdef TIOCGSIZE
1674
1675 /* SunOS - style. */
1676 struct ttysize size;
1677
1678 if (ioctl (input_fd, TIOCGSIZE, &size) == -1)
1679 *widthp = *heightp = 0;
1680 else
1681 {
1682 *widthp = size.ts_cols;
1683 *heightp = size.ts_lines;
1684 }
1685
1686#else
1687#ifdef VMS
1688
1689 struct sensemode tty;
1690
1691 SYS$QIOW (0, input_fd, IO$_SENSEMODE, &tty, 0, 0,
1692 &tty.class, 12, 0, 0, 0, 0);
1693 *widthp = tty.scr_wid;
1694 *heightp = tty.scr_len;
1695
1696#else
1697#ifdef MSDOS
1698 *widthp = ScreenCols ();
1699 *heightp = ScreenRows ();
1700#else /* system doesn't know size */
1701 *widthp = 0;
1702 *heightp = 0;
1703#endif
1704
1705#endif /* not VMS */
1706#endif /* not SunOS-style */
1707#endif /* not BSD-style */
1708}
1709
1710/* Set the logical window size associated with descriptor FD
1711 to HEIGHT and WIDTH. This is used mainly with ptys. */
1712
1713int
1714set_window_size (fd, height, width)
1715 int fd, height, width;
1716{
1717#ifdef TIOCSWINSZ
1718
1719 /* BSD-style. */
1720 struct winsize size;
1721 size.ws_row = height;
1722 size.ws_col = width;
1723
1724 if (ioctl (fd, TIOCSWINSZ, &size) == -1)
1725 return 0; /* error */
1726 else
1727 return 1;
1728
1729#else
1730#ifdef TIOCSSIZE
1731
1732 /* SunOS - style. */
1733 struct ttysize size;
1734 size.ts_lines = height;
1735 size.ts_cols = width;
1736
1737 if (ioctl (fd, TIOCGSIZE, &size) == -1)
1738 return 0;
1739 else
1740 return 1;
1741#else
1742 return -1;
1743#endif /* not SunOS-style */
1744#endif /* not BSD-style */
1745}
1746
1747\f
1748/* Prepare the terminal for exiting Emacs; move the cursor to the
1749 bottom of the frame, turn off interrupt-driven I/O, etc. */
1750void
1751reset_sys_modes ()
1752{
1753 struct frame *sf;
1754
1755 if (noninteractive)
1756 {
1757 fflush (stdout);
1758 return;
1759 }
1760 if (!term_initted)
1761 return;
1762#ifdef HAVE_WINDOW_SYSTEM
1763 /* Emacs' window system on MSDOG uses the `internal terminal' and therefore
1764 needs the clean-up code below. */
1765 if (!EQ (Vwindow_system, Qnil)
1766#ifndef WINDOWSNT
1767 /* When running in tty mode on NT/Win95, we have a read_socket
1768 hook, but still need the rest of the clean-up code below. */
1769 || read_socket_hook
1770#endif
1771 )
1772 return;
1773#endif
1774 sf = SELECTED_FRAME ();
1775 cursor_to (FRAME_HEIGHT (sf) - 1, 0);
1776 clear_end_of_line (FRAME_WIDTH (sf));
1777 /* clear_end_of_line may move the cursor */
1778 cursor_to (FRAME_HEIGHT (sf) - 1, 0);
1779#if defined (IBMR2AIX) && defined (AIXHFT)
1780 {
1781 /* HFT devices normally use ^J as a LF/CR. We forced it to
1782 do the LF only. Now, we need to reset it. */
1783 struct termio tty;
1784
1785 if (ioctl (1, HFTGETID, &tty) != -1)
1786 write (1, "\033[20h", 5);
1787 }
1788#endif
1789
1790 reset_terminal_modes ();
1791 fflush (stdout);
1792#ifdef BSD_SYSTEM
1793#ifndef BSD4_1
1794 /* Avoid possible loss of output when changing terminal modes. */
1795 fsync (fileno (stdout));
1796#endif
1797#endif
1798
1799#ifdef F_SETFL
1800#ifndef F_SETOWN_BUG
1801#ifdef F_SETOWN /* F_SETFL does not imply existence of F_SETOWN */
1802 if (interrupt_input)
1803 {
1804 reset_sigio ();
1805 fcntl (input_fd, F_SETOWN, old_fcntl_owner);
1806 }
1807#endif /* F_SETOWN */
1808#endif /* F_SETOWN_BUG */
1809#ifdef O_NDELAY
1810 fcntl (input_fd, F_SETFL, fcntl (input_fd, F_GETFL, 0) & ~O_NDELAY);
1811#endif
1812#endif /* F_SETFL */
1813#ifdef BSD4_1
1814 if (interrupt_input)
1815 reset_sigio ();
1816#endif /* BSD4_1 */
1817
1818 if (old_tty_valid)
1819 while (EMACS_SET_TTY (input_fd, &old_tty, 0) < 0 && errno == EINTR)
1820 ;
1821
1822#ifdef MSDOS /* Demacs 1.1.2 91/10/20 Manabu Higashida */
1823 dos_ttcooked ();
1824#endif
1825
1826#ifdef SET_LINE_DISCIPLINE
1827 /* Ultrix's termios *ignores* any line discipline except TERMIODISC.
1828 A different old line discipline is therefore not restored, yet.
1829 Restore the old line discipline by hand. */
1830 ioctl (0, TIOCSETD, &old_tty.main.c_line);
1831#endif
1832
1833#ifdef AIXHFT
1834 hft_reset ();
1835#endif
1836
1837#ifdef BSD_PGRPS
1838 widen_foreground_group ();
1839#endif
1840}
1841\f
1842#ifdef HAVE_PTYS
1843
1844/* Set up the proper status flags for use of a pty. */
1845
1846void
1847setup_pty (fd)
1848 int fd;
1849{
1850 /* I'm told that TOICREMOTE does not mean control chars
1851 "can't be sent" but rather that they don't have
1852 input-editing or signaling effects.
1853 That should be good, because we have other ways
1854 to do those things in Emacs.
1855 However, telnet mode seems not to work on 4.2.
1856 So TIOCREMOTE is turned off now. */
1857
1858 /* Under hp-ux, if TIOCREMOTE is turned on, some calls
1859 will hang. In particular, the "timeout" feature (which
1860 causes a read to return if there is no data available)
1861 does this. Also it is known that telnet mode will hang
1862 in such a way that Emacs must be stopped (perhaps this
1863 is the same problem).
1864
1865 If TIOCREMOTE is turned off, then there is a bug in
1866 hp-ux which sometimes loses data. Apparently the
1867 code which blocks the master process when the internal
1868 buffer fills up does not work. Other than this,
1869 though, everything else seems to work fine.
1870
1871 Since the latter lossage is more benign, we may as well
1872 lose that way. -- cph */
1873#ifdef FIONBIO
1874#ifdef SYSV_PTYS
1875 {
1876 int on = 1;
1877 ioctl (fd, FIONBIO, &on);
1878 }
1879#endif
1880#endif
1881#ifdef IBMRTAIX
1882 /* On AIX, the parent gets SIGHUP when a pty attached child dies. So, we */
1883 /* ignore SIGHUP once we've started a child on a pty. Note that this may */
1884 /* cause EMACS not to die when it should, i.e., when its own controlling */
1885 /* tty goes away. I've complained to the AIX developers, and they may */
1886 /* change this behavior, but I'm not going to hold my breath. */
1887 signal (SIGHUP, SIG_IGN);
1888#endif
1889}
1890#endif /* HAVE_PTYS */
1891\f
1892#ifdef VMS
1893
1894/* Assigning an input channel is done at the start of Emacs execution.
1895 This is called each time Emacs is resumed, also, but does nothing
1896 because input_chain is no longer zero. */
1897
1898void
1899init_vms_input ()
1900{
1901 int status;
1902
1903 if (input_fd == 0)
1904 {
1905 status = SYS$ASSIGN (&input_dsc, &input_fd, 0, 0);
1906 if (! (status & 1))
1907 LIB$STOP (status);
1908 }
1909}
1910
1911/* Deassigning the input channel is done before exiting. */
1912
1913void
1914stop_vms_input ()
1915{
1916 return SYS$DASSGN (input_fd);
1917}
1918
1919short input_buffer;
1920
1921/* Request reading one character into the keyboard buffer.
1922 This is done as soon as the buffer becomes empty. */
1923
1924void
1925queue_kbd_input ()
1926{
1927 int status;
1928 extern kbd_input_ast ();
1929
1930 waiting_for_ast = 0;
1931 stop_input = 0;
1932 status = SYS$QIO (0, input_fd, IO$_READVBLK,
1933 &input_iosb, kbd_input_ast, 1,
1934 &input_buffer, 1, 0, terminator_mask, 0, 0);
1935}
1936
1937int input_count;
1938
1939/* Ast routine that is called when keyboard input comes in
1940 in accord with the SYS$QIO above. */
1941
1942void
1943kbd_input_ast ()
1944{
1945 register int c = -1;
1946 int old_errno = errno;
1947 extern EMACS_TIME *input_available_clear_time;
1948
1949 if (waiting_for_ast)
1950 SYS$SETEF (input_ef);
1951 waiting_for_ast = 0;
1952 input_count++;
1953#ifdef ASTDEBUG
1954 if (input_count == 25)
1955 exit (1);
1956 printf ("Ast # %d,", input_count);
1957 printf (" iosb = %x, %x, %x, %x",
1958 input_iosb.offset, input_iosb.status, input_iosb.termlen,
1959 input_iosb.term);
1960#endif
1961 if (input_iosb.offset)
1962 {
1963 c = input_buffer;
1964#ifdef ASTDEBUG
1965 printf (", char = 0%o", c);
1966#endif
1967 }
1968#ifdef ASTDEBUG
1969 printf ("\n");
1970 fflush (stdout);
1971 sleep (1);
1972#endif
1973 if (! stop_input)
1974 queue_kbd_input ();
1975 if (c >= 0)
1976 {
1977 struct input_event e;
1978 e.kind = ascii_keystroke;
1979 XSETINT (e.code, c);
1980 e.frame_or_window = selected_frame;
1981 kbd_buffer_store_event (&e);
1982 }
1983 if (input_available_clear_time)
1984 EMACS_SET_SECS_USECS (*input_available_clear_time, 0, 0);
1985 errno = old_errno;
1986}
1987
1988/* Wait until there is something in kbd_buffer. */
1989
1990void
1991wait_for_kbd_input ()
1992{
1993 extern int have_process_input, process_exited;
1994
1995 /* If already something, avoid doing system calls. */
1996 if (detect_input_pending ())
1997 {
1998 return;
1999 }
2000 /* Clear a flag, and tell ast routine above to set it. */
2001 SYS$CLREF (input_ef);
2002 waiting_for_ast = 1;
2003 /* Check for timing error: ast happened while we were doing that. */
2004 if (!detect_input_pending ())
2005 {
2006 /* No timing error: wait for flag to be set. */
2007 set_waiting_for_input (0);
2008 SYS$WFLOR (input_ef, input_eflist);
2009 clear_waiting_for_input (0);
2010 if (!detect_input_pending ())
2011 /* Check for subprocess input availability */
2012 {
2013 int dsp = have_process_input || process_exited;
2014
2015 SYS$CLREF (process_ef);
2016 if (have_process_input)
2017 process_command_input ();
2018 if (process_exited)
2019 process_exit ();
2020 if (dsp)
2021 {
2022 update_mode_lines++;
2023 prepare_menu_bars ();
2024 redisplay_preserve_echo_area ();
2025 }
2026 }
2027 }
2028 waiting_for_ast = 0;
2029}
2030
2031/* Get rid of any pending QIO, when we are about to suspend
2032 or when we want to throw away pending input.
2033 We wait for a positive sign that the AST routine has run
2034 and therefore there is no I/O request queued when we return.
2035 SYS$SETAST is used to avoid a timing error. */
2036
2037void
2038end_kbd_input ()
2039{
2040#ifdef ASTDEBUG
2041 printf ("At end_kbd_input.\n");
2042 fflush (stdout);
2043 sleep (1);
2044#endif
2045 if (LIB$AST_IN_PROG ()) /* Don't wait if suspending from kbd_buffer_store_event! */
2046 {
2047 SYS$CANCEL (input_fd);
2048 return;
2049 }
2050
2051 SYS$SETAST (0);
2052 /* Clear a flag, and tell ast routine above to set it. */
2053 SYS$CLREF (input_ef);
2054 waiting_for_ast = 1;
2055 stop_input = 1;
2056 SYS$CANCEL (input_fd);
2057 SYS$SETAST (1);
2058 SYS$WAITFR (input_ef);
2059 waiting_for_ast = 0;
2060}
2061
2062/* Wait for either input available or time interval expiry. */
2063
2064void
2065input_wait_timeout (timeval)
2066 int timeval; /* Time to wait, in seconds */
2067{
2068 int time [2];
2069 static int zero = 0;
2070 static int large = -10000000;
2071
2072 LIB$EMUL (&timeval, &large, &zero, time); /* Convert to VMS format */
2073
2074 /* If already something, avoid doing system calls. */
2075 if (detect_input_pending ())
2076 {
2077 return;
2078 }
2079 /* Clear a flag, and tell ast routine above to set it. */
2080 SYS$CLREF (input_ef);
2081 waiting_for_ast = 1;
2082 /* Check for timing error: ast happened while we were doing that. */
2083 if (!detect_input_pending ())
2084 {
2085 /* No timing error: wait for flag to be set. */
2086 SYS$CANTIM (1, 0);
2087 if (SYS$SETIMR (timer_ef, time, 0, 1) & 1) /* Set timer */
2088 SYS$WFLOR (timer_ef, timer_eflist); /* Wait for timer expiry or input */
2089 }
2090 waiting_for_ast = 0;
2091}
2092
2093/* The standard `sleep' routine works some other way
2094 and it stops working if you have ever quit out of it.
2095 This one continues to work. */
2096
2097sys_sleep (timeval)
2098 int timeval;
2099{
2100 int time [2];
2101 static int zero = 0;
2102 static int large = -10000000;
2103
2104 LIB$EMUL (&timeval, &large, &zero, time); /* Convert to VMS format */
2105
2106 SYS$CANTIM (1, 0);
2107 if (SYS$SETIMR (timer_ef, time, 0, 1) & 1) /* Set timer */
2108 SYS$WAITFR (timer_ef); /* Wait for timer expiry only */
2109}
2110
2111void
2112init_sigio (fd)
2113 int fd;
2114{
2115 request_sigio ();
2116}
2117
2118reset_sigio ()
2119{
2120 unrequest_sigio ();
2121}
2122
2123void
2124request_sigio ()
2125{
2126 croak ("request sigio");
2127}
2128
2129void
2130unrequest_sigio ()
2131{
2132 croak ("unrequest sigio");
2133}
2134
2135#endif /* VMS */
2136\f
2137/* Note that VMS compiler won't accept defined (CANNOT_DUMP). */
2138#ifndef CANNOT_DUMP
2139#define NEED_STARTS
2140#endif
2141
2142#ifndef SYSTEM_MALLOC
2143#ifndef NEED_STARTS
2144#define NEED_STARTS
2145#endif
2146#endif
2147
2148#ifdef NEED_STARTS
2149/* Some systems that cannot dump also cannot implement these. */
2150
2151/*
2152 * Return the address of the start of the text segment prior to
2153 * doing an unexec. After unexec the return value is undefined.
2154 * See crt0.c for further explanation and _start.
2155 *
2156 */
2157
2158#ifndef HAVE_TEXT_START
2159char *
2160start_of_text ()
2161{
2162#ifdef TEXT_START
2163 return ((char *) TEXT_START);
2164#else
2165#ifdef GOULD
2166 extern csrt ();
2167 return ((char *) csrt);
2168#else /* not GOULD */
2169 extern int _start ();
2170 return ((char *) _start);
2171#endif /* GOULD */
2172#endif /* TEXT_START */
2173}
2174#endif /* not HAVE_TEXT_START */
2175
2176/*
2177 * Return the address of the start of the data segment prior to
2178 * doing an unexec. After unexec the return value is undefined.
2179 * See crt0.c for further information and definition of data_start.
2180 *
2181 * Apparently, on BSD systems this is etext at startup. On
2182 * USG systems (swapping) this is highly mmu dependent and
2183 * is also dependent on whether or not the program is running
2184 * with shared text. Generally there is a (possibly large)
2185 * gap between end of text and start of data with shared text.
2186 *
2187 * On Uniplus+ systems with shared text, data starts at a
2188 * fixed address. Each port (from a given oem) is generally
2189 * different, and the specific value of the start of data can
2190 * be obtained via the UniPlus+ specific "uvar" system call,
2191 * however the method outlined in crt0.c seems to be more portable.
2192 *
2193 * Probably what will have to happen when a USG unexec is available,
2194 * at least on UniPlus, is temacs will have to be made unshared so
2195 * that text and data are contiguous. Then once loadup is complete,
2196 * unexec will produce a shared executable where the data can be
2197 * at the normal shared text boundary and the startofdata variable
2198 * will be patched by unexec to the correct value.
2199 *
2200 */
2201
2202char *
2203start_of_data ()
2204{
2205#ifdef DATA_START
2206 return ((char *) DATA_START);
2207#else
2208#ifdef ORDINARY_LINK
2209 /*
2210 * This is a hack. Since we're not linking crt0.c or pre_crt0.c,
2211 * data_start isn't defined. We take the address of environ, which
2212 * is known to live at or near the start of the system crt0.c, and
2213 * we don't sweat the handful of bytes that might lose.
2214 */
2215 extern char **environ;
2216
2217 return ((char *) &environ);
2218#else
2219 extern int data_start;
2220 return ((char *) &data_start);
2221#endif /* ORDINARY_LINK */
2222#endif /* DATA_START */
2223}
2224#endif /* NEED_STARTS (not CANNOT_DUMP or not SYSTEM_MALLOC) */
2225
2226#ifndef CANNOT_DUMP
2227/* Some systems that cannot dump also cannot implement these. */
2228
2229/*
2230 * Return the address of the end of the text segment prior to
2231 * doing an unexec. After unexec the return value is undefined.
2232 */
2233
2234char *
2235end_of_text ()
2236{
2237#ifdef TEXT_END
2238 return ((char *) TEXT_END);
2239#else
2240 extern int etext;
2241 return ((char *) &etext);
2242#endif
2243}
2244
2245/*
2246 * Return the address of the end of the data segment prior to
2247 * doing an unexec. After unexec the return value is undefined.
2248 */
2249
2250char *
2251end_of_data ()
2252{
2253#ifdef DATA_END
2254 return ((char *) DATA_END);
2255#else
2256 extern int edata;
2257 return ((char *) &edata);
2258#endif
2259}
2260
2261#endif /* not CANNOT_DUMP */
2262\f
2263/* init_system_name sets up the string for the Lisp function
2264 system-name to return. */
2265
2266#ifdef BSD4_1
2267#include <whoami.h>
2268#endif
2269
2270extern Lisp_Object Vsystem_name;
2271
2272#ifndef BSD4_1
2273#ifndef VMS
2274#ifdef HAVE_SOCKETS
2275#include <sys/socket.h>
2276#include <netdb.h>
2277#endif /* HAVE_SOCKETS */
2278#endif /* not VMS */
2279#endif /* not BSD4_1 */
2280
2281void
2282init_system_name ()
2283{
2284#ifdef BSD4_1
2285 Vsystem_name = build_string (sysname);
2286#else
2287#ifdef VMS
2288 char *sp, *end;
2289 if ((sp = egetenv ("SYS$NODE")) == 0)
2290 Vsystem_name = build_string ("vax-vms");
2291 else if ((end = index (sp, ':')) == 0)
2292 Vsystem_name = build_string (sp);
2293 else
2294 Vsystem_name = make_string (sp, end - sp);
2295#else
2296#ifndef HAVE_GETHOSTNAME
2297 struct utsname uts;
2298 uname (&uts);
2299 Vsystem_name = build_string (uts.nodename);
2300#else /* HAVE_GETHOSTNAME */
2301 unsigned int hostname_size = 256;
2302 char *hostname = (char *) alloca (hostname_size);
2303
2304 /* Try to get the host name; if the buffer is too short, try
2305 again. Apparently, the only indication gethostname gives of
2306 whether the buffer was large enough is the presence or absence
2307 of a '\0' in the string. Eech. */
2308 for (;;)
2309 {
2310 gethostname (hostname, hostname_size - 1);
2311 hostname[hostname_size - 1] = '\0';
2312
2313 /* Was the buffer large enough for the '\0'? */
2314 if (strlen (hostname) < hostname_size - 1)
2315 break;
2316
2317 hostname_size <<= 1;
2318 hostname = (char *) alloca (hostname_size);
2319 }
2320#ifdef HAVE_SOCKETS
2321 /* Turn the hostname into the official, fully-qualified hostname.
2322 Don't do this if we're going to dump; this can confuse system
2323 libraries on some machines and make the dumped emacs core dump. */
2324#ifndef CANNOT_DUMP
2325 if (initialized)
2326#endif /* not CANNOT_DUMP */
2327 if (! index (hostname, '.'))
2328 {
2329 struct hostent *hp;
2330 int count;
2331 for (count = 0;; count++)
2332 {
2333#ifdef TRY_AGAIN
2334 h_errno = 0;
2335#endif
2336 hp = gethostbyname (hostname);
2337#ifdef TRY_AGAIN
2338 if (! (hp == 0 && h_errno == TRY_AGAIN))
2339#endif
2340 break;
2341 if (count >= 5)
2342 break;
2343 Fsleep_for (make_number (1), Qnil);
2344 }
2345 if (hp)
2346 {
2347 char *fqdn = (char *) hp->h_name;
2348 char *p;
2349
2350 if (!index (fqdn, '.'))
2351 {
2352 /* We still don't have a fully qualified domain name.
2353 Try to find one in the list of alternate names */
2354 char **alias = hp->h_aliases;
2355 while (*alias && !index (*alias, '.'))
2356 alias++;
2357 if (*alias)
2358 fqdn = *alias;
2359 }
2360 hostname = fqdn;
2361#if 0
2362 /* Convert the host name to lower case. */
2363 /* Using ctype.h here would introduce a possible locale
2364 dependence that is probably wrong for hostnames. */
2365 p = hostname;
2366 while (*p)
2367 {
2368 if (*p >= 'A' && *p <= 'Z')
2369 *p += 'a' - 'A';
2370 p++;
2371 }
2372#endif
2373 }
2374 }
2375#endif /* HAVE_SOCKETS */
2376 /* We used to try using getdomainname here,
2377 but NIIBE Yutaka <gniibe@etl.go.jp> says that
2378 getdomainname gets the NIS/YP domain which often is not the same
2379 as in Internet domain name. */
2380#if 0 /* Turned off because sysinfo is not really likely to return the
2381 correct Internet domain. */
2382#if (HAVE_SYSINFO && defined (SI_SRPC_DOMAIN))
2383 if (! index (hostname, '.'))
2384 {
2385 /* The hostname is not fully qualified. Append the domain name. */
2386
2387 int hostlen = strlen (hostname);
2388 int domain_size = 256;
2389
2390 for (;;)
2391 {
2392 char *domain = (char *) alloca (domain_size + 1);
2393 char *fqdn = (char *) alloca (hostlen + 1 + domain_size + 1);
2394 int sys_domain_size = sysinfo (SI_SRPC_DOMAIN, domain, domain_size);
2395 if (sys_domain_size <= 0)
2396 break;
2397 if (domain_size < sys_domain_size)
2398 {
2399 domain_size = sys_domain_size;
2400 continue;
2401 }
2402 strcpy (fqdn, hostname);
2403 if (domain[0] == '.')
2404 strcpy (fqdn + hostlen, domain);
2405 else if (domain[0] != 0)
2406 {
2407 fqdn[hostlen] = '.';
2408 strcpy (fqdn + hostlen + 1, domain);
2409 }
2410 hostname = fqdn;
2411 break;
2412 }
2413 }
2414#endif /* HAVE_SYSINFO && defined (SI_SRPC_DOMAIN) */
2415#endif /* 0 */
2416 Vsystem_name = build_string (hostname);
2417#endif /* HAVE_GETHOSTNAME */
2418#endif /* VMS */
2419#endif /* BSD4_1 */
2420 {
2421 unsigned char *p;
2422 for (p = XSTRING (Vsystem_name)->data; *p; p++)
2423 if (*p == ' ' || *p == '\t')
2424 *p = '-';
2425 }
2426}
2427\f
2428#ifndef MSDOS
2429#ifndef VMS
2430#if !defined (HAVE_SELECT) || defined (BROKEN_SELECT_NON_X)
2431
2432#include "sysselect.h"
2433#undef select
2434
2435#if defined (HAVE_X_WINDOWS) && !defined (HAVE_SELECT)
2436/* Cause explanatory error message at compile time,
2437 since the select emulation is not good enough for X. */
2438int *x = &x_windows_lose_if_no_select_system_call;
2439#endif
2440
2441/* Emulate as much as select as is possible under 4.1 and needed by Gnu Emacs
2442 * Only checks read descriptors.
2443 */
2444/* How long to wait between checking fds in select */
2445#define SELECT_PAUSE 1
2446int select_alarmed;
2447
2448/* For longjmp'ing back to read_input_waiting. */
2449
2450jmp_buf read_alarm_throw;
2451
2452/* Nonzero if the alarm signal should throw back to read_input_waiting.
2453 The read_socket_hook function sets this to 1 while it is waiting. */
2454
2455int read_alarm_should_throw;
2456
2457SIGTYPE
2458select_alarm ()
2459{
2460 select_alarmed = 1;
2461#ifdef BSD4_1
2462 sigrelse (SIGALRM);
2463#else /* not BSD4_1 */
2464 signal (SIGALRM, SIG_IGN);
2465#endif /* not BSD4_1 */
2466 if (read_alarm_should_throw)
2467 longjmp (read_alarm_throw, 1);
2468}
2469
2470#ifndef WINDOWSNT
2471/* Only rfds are checked. */
2472int
2473sys_select (nfds, rfds, wfds, efds, timeout)
2474 int nfds;
2475 SELECT_TYPE *rfds, *wfds, *efds;
2476 EMACS_TIME *timeout;
2477{
2478 int ravail = 0, old_alarm;
2479 SELECT_TYPE orfds;
2480 int timeoutval;
2481 int *local_timeout;
2482 extern int proc_buffered_char[];
2483#ifndef subprocesses
2484 int process_tick = 0, update_tick = 0;
2485#else
2486 extern int process_tick, update_tick;
2487#endif
2488 SIGTYPE (*old_trap) ();
2489 unsigned char buf;
2490
2491#if defined (HAVE_SELECT) && defined (HAVE_X_WINDOWS)
2492 /* If we're using X, then the native select will work; we only need the
2493 emulation for non-X usage. */
2494 if (!NILP (Vwindow_system))
2495 return select (nfds, rfds, wfds, efds, timeout);
2496#endif
2497 timeoutval = timeout ? EMACS_SECS (*timeout) : 100000;
2498 local_timeout = &timeoutval;
2499 FD_ZERO (&orfds);
2500 if (rfds)
2501 {
2502 orfds = *rfds;
2503 FD_ZERO (rfds);
2504 }
2505 if (wfds)
2506 FD_ZERO (wfds);
2507 if (efds)
2508 FD_ZERO (efds);
2509
2510 /* If we are looking only for the terminal, with no timeout,
2511 just read it and wait -- that's more efficient. */
2512 if (*local_timeout == 100000 && process_tick == update_tick
2513 && FD_ISSET (0, &orfds))
2514 {
2515 int fd;
2516 for (fd = 1; fd < nfds; ++fd)
2517 if (FD_ISSET (fd, &orfds))
2518 goto hardway;
2519 if (! detect_input_pending ())
2520 read_input_waiting ();
2521 FD_SET (0, rfds);
2522 return 1;
2523 }
2524
2525 hardway:
2526 /* Once a second, till the timer expires, check all the flagged read
2527 * descriptors to see if any input is available. If there is some then
2528 * set the corresponding bit in the return copy of rfds.
2529 */
2530 while (1)
2531 {
2532 register int to_check, fd;
2533
2534 if (rfds)
2535 {
2536 for (to_check = nfds, fd = 0; --to_check >= 0; fd++)
2537 {
2538 if (FD_ISSET (fd, &orfds))
2539 {
2540 int avail = 0, status = 0;
2541
2542 if (fd == 0)
2543 avail = detect_input_pending (); /* Special keyboard handler */
2544 else
2545 {
2546#ifdef FIONREAD
2547 status = ioctl (fd, FIONREAD, &avail);
2548#else /* no FIONREAD */
2549 /* Hoping it will return -1 if nothing available
2550 or 0 if all 0 chars requested are read. */
2551 if (proc_buffered_char[fd] >= 0)
2552 avail = 1;
2553 else
2554 {
2555 avail = read (fd, &buf, 1);
2556 if (avail > 0)
2557 proc_buffered_char[fd] = buf;
2558 }
2559#endif /* no FIONREAD */
2560 }
2561 if (status >= 0 && avail > 0)
2562 {
2563 FD_SET (fd, rfds);
2564 ravail++;
2565 }
2566 }
2567 }
2568 }
2569 if (*local_timeout == 0 || ravail != 0 || process_tick != update_tick)
2570 break;
2571 old_alarm = alarm (0);
2572 old_trap = signal (SIGALRM, select_alarm);
2573 select_alarmed = 0;
2574 alarm (SELECT_PAUSE);
2575 /* Wait for a SIGALRM (or maybe a SIGTINT) */
2576 while (select_alarmed == 0 && *local_timeout != 0
2577 && process_tick == update_tick)
2578 {
2579 /* If we are interested in terminal input,
2580 wait by reading the terminal.
2581 That makes instant wakeup for terminal input at least. */
2582 if (FD_ISSET (0, &orfds))
2583 {
2584 read_input_waiting ();
2585 if (detect_input_pending ())
2586 select_alarmed = 1;
2587 }
2588 else
2589 pause ();
2590 }
2591 (*local_timeout) -= SELECT_PAUSE;
2592 /* Reset the old alarm if there was one */
2593 alarm (0);
2594 signal (SIGALRM, old_trap);
2595 if (old_alarm != 0)
2596 {
2597 /* Reset or forge an interrupt for the original handler. */
2598 old_alarm -= SELECT_PAUSE;
2599 if (old_alarm <= 0)
2600 kill (getpid (), SIGALRM); /* Fake an alarm with the orig' handler */
2601 else
2602 alarm (old_alarm);
2603 }
2604 if (*local_timeout == 0) /* Stop on timer being cleared */
2605 break;
2606 }
2607 return ravail;
2608}
2609#endif /* not WINDOWSNT */
2610
2611/* Read keyboard input into the standard buffer,
2612 waiting for at least one character. */
2613
2614/* Make all keyboard buffers much bigger when using a window system. */
2615#ifdef HAVE_WINDOW_SYSTEM
2616#define BUFFER_SIZE_FACTOR 16
2617#else
2618#define BUFFER_SIZE_FACTOR 1
2619#endif
2620
2621void
2622read_input_waiting ()
2623{
2624 struct input_event e;
2625 int nread, i;
2626 extern int quit_char;
2627
2628 if (read_socket_hook)
2629 {
2630 struct input_event buf[256];
2631
2632 read_alarm_should_throw = 0;
2633 if (! setjmp (read_alarm_throw))
2634 nread = (*read_socket_hook) (0, buf, 256, 1);
2635 else
2636 nread = -1;
2637
2638 /* Scan the chars for C-g and store them in kbd_buffer. */
2639 for (i = 0; i < nread; i++)
2640 {
2641 kbd_buffer_store_event (&buf[i]);
2642 /* Don't look at input that follows a C-g too closely.
2643 This reduces lossage due to autorepeat on C-g. */
2644 if (buf[i].kind == ascii_keystroke
2645 && buf[i].code == quit_char)
2646 break;
2647 }
2648 }
2649 else
2650 {
2651 char buf[3];
2652 nread = read (fileno (stdin), buf, 1);
2653
2654 /* Scan the chars for C-g and store them in kbd_buffer. */
2655 e.kind = ascii_keystroke;
2656 e.frame_or_window = selected_frame;
2657 e.modifiers = 0;
2658 for (i = 0; i < nread; i++)
2659 {
2660 /* Convert chars > 0177 to meta events if desired.
2661 We do this under the same conditions that read_avail_input does. */
2662 if (read_socket_hook == 0)
2663 {
2664 /* If the user says she has a meta key, then believe her. */
2665 if (meta_key == 1 && (buf[i] & 0x80))
2666 e.modifiers = meta_modifier;
2667 if (meta_key != 2)
2668 buf[i] &= ~0x80;
2669 }
2670
2671 XSETINT (e.code, buf[i]);
2672 kbd_buffer_store_event (&e);
2673 /* Don't look at input that follows a C-g too closely.
2674 This reduces lossage due to autorepeat on C-g. */
2675 if (buf[i] == quit_char)
2676 break;
2677 }
2678 }
2679}
2680
2681#endif /* not HAVE_SELECT */
2682#endif /* not VMS */
2683#endif /* not MSDOS */
2684\f
2685#ifdef BSD4_1
2686void
2687init_sigio (fd)
2688 int fd;
2689{
2690 if (noninteractive)
2691 return;
2692 lmode = LINTRUP | lmode;
2693 ioctl (fd, TIOCLSET, &lmode);
2694}
2695
2696void
2697reset_sigio ()
2698{
2699 if (noninteractive)
2700 return;
2701 lmode = ~LINTRUP & lmode;
2702 ioctl (0, TIOCLSET, &lmode);
2703}
2704
2705void
2706request_sigio ()
2707{
2708 sigrelse (SIGTINT);
2709
2710 interrupts_deferred = 0;
2711}
2712
2713void
2714unrequest_sigio ()
2715{
2716 sighold (SIGTINT);
2717
2718 interrupts_deferred = 1;
2719}
2720
2721/* still inside #ifdef BSD4_1 */
2722#ifdef subprocesses
2723
2724int sigheld; /* Mask of held signals */
2725
2726void
2727sigholdx (signum)
2728 int signum;
2729{
2730 sigheld |= sigbit (signum);
2731 sighold (signum);
2732}
2733
2734void
2735sigisheld (signum)
2736 int signum;
2737{
2738 sigheld |= sigbit (signum);
2739}
2740
2741void
2742sigunhold (signum)
2743 int signum;
2744{
2745 sigheld &= ~sigbit (signum);
2746 sigrelse (signum);
2747}
2748
2749void
2750sigfree () /* Free all held signals */
2751{
2752 int i;
2753 for (i = 0; i < NSIG; i++)
2754 if (sigheld & sigbit (i))
2755 sigrelse (i);
2756 sigheld = 0;
2757}
2758
2759int
2760sigbit (i)
2761{
2762 return 1 << (i - 1);
2763}
2764#endif /* subprocesses */
2765#endif /* BSD4_1 */
2766\f
2767/* POSIX signals support - DJB */
2768/* Anyone with POSIX signals should have ANSI C declarations */
2769
2770#ifdef POSIX_SIGNALS
2771
2772sigset_t empty_mask, full_mask;
2773
2774signal_handler_t
2775sys_signal (int signal_number, signal_handler_t action)
2776{
2777 struct sigaction new_action, old_action;
2778 sigemptyset (&new_action.sa_mask);
2779 new_action.sa_handler = action;
2780#ifdef SA_RESTART
2781 /* Emacs mostly works better with restartable system services. If this
2782 * flag exists, we probably want to turn it on here.
2783 */
2784 new_action.sa_flags = SA_RESTART;
2785#else
2786 new_action.sa_flags = 0;
2787#endif
2788 sigaction (signal_number, &new_action, &old_action);
2789 return (old_action.sa_handler);
2790}
2791
2792#ifndef __GNUC__
2793/* If we're compiling with GCC, we don't need this function, since it
2794 can be written as a macro. */
2795sigset_t
2796sys_sigmask (int sig)
2797{
2798 sigset_t mask;
2799 sigemptyset (&mask);
2800 sigaddset (&mask, sig);
2801 return mask;
2802}
2803#endif
2804
2805/* I'd like to have these guys return pointers to the mask storage in here,
2806 but there'd be trouble if the code was saving multiple masks. I'll be
2807 safe and pass the structure. It normally won't be more than 2 bytes
2808 anyhow. - DJB */
2809
2810sigset_t
2811sys_sigblock (sigset_t new_mask)
2812{
2813 sigset_t old_mask;
2814 sigprocmask (SIG_BLOCK, &new_mask, &old_mask);
2815 return (old_mask);
2816}
2817
2818sigset_t
2819sys_sigunblock (sigset_t new_mask)
2820{
2821 sigset_t old_mask;
2822 sigprocmask (SIG_UNBLOCK, &new_mask, &old_mask);
2823 return (old_mask);
2824}
2825
2826sigset_t
2827sys_sigsetmask (sigset_t new_mask)
2828{
2829 sigset_t old_mask;
2830 sigprocmask (SIG_SETMASK, &new_mask, &old_mask);
2831 return (old_mask);
2832}
2833
2834#endif /* POSIX_SIGNALS */
2835\f
2836#if !defined HAVE_STRSIGNAL && !defined SYS_SIGLIST_DECLARED
2837static char *my_sys_siglist[NSIG];
2838# ifdef sys_siglist
2839# undef sys_siglist
2840# endif
2841# define sys_siglist my_sys_siglist
2842#endif
2843
2844void
2845init_signals ()
2846{
2847#ifdef POSIX_SIGNALS
2848 sigemptyset (&empty_mask);
2849 sigfillset (&full_mask);
2850#endif
2851
2852#if !defined HAVE_STRSIGNAL && !defined SYS_SIGLIST_DECLARED
2853 if (! initialized)
2854 {
2855# ifdef SIGABRT
2856 sys_siglist[SIGABRT] = "Aborted";
2857# endif
2858# ifdef SIGAIO
2859 sys_siglist[SIGAIO] = "LAN I/O interrupt";
2860# endif
2861# ifdef SIGALRM
2862 sys_siglist[SIGALRM] = "Alarm clock";
2863# endif
2864# ifdef SIGBUS
2865 sys_siglist[SIGBUS] = "Bus error";
2866# endif
2867# ifdef SIGCLD
2868 sys_siglist[SIGCLD] = "Child status changed";
2869# endif
2870# ifdef SIGCHLD
2871 sys_siglist[SIGCHLD] = "Child status changed";
2872# endif
2873# ifdef SIGCONT
2874 sys_siglist[SIGCONT] = "Continued";
2875# endif
2876# ifdef SIGDANGER
2877 sys_siglist[SIGDANGER] = "Swap space dangerously low";
2878# endif
2879# ifdef SIGDGNOTIFY
2880 sys_siglist[SIGDGNOTIFY] = "Notification message in queue";
2881# endif
2882# ifdef SIGEMT
2883 sys_siglist[SIGEMT] = "Emulation trap";
2884# endif
2885# ifdef SIGFPE
2886 sys_siglist[SIGFPE] = "Arithmetic exception";
2887# endif
2888# ifdef SIGFREEZE
2889 sys_siglist[SIGFREEZE] = "SIGFREEZE";
2890# endif
2891# ifdef SIGGRANT
2892 sys_siglist[SIGGRANT] = "Monitor mode granted";
2893# endif
2894# ifdef SIGHUP
2895 sys_siglist[SIGHUP] = "Hangup";
2896# endif
2897# ifdef SIGILL
2898 sys_siglist[SIGILL] = "Illegal instruction";
2899# endif
2900# ifdef SIGINT
2901 sys_siglist[SIGINT] = "Interrupt";
2902# endif
2903# ifdef SIGIO
2904 sys_siglist[SIGIO] = "I/O possible";
2905# endif
2906# ifdef SIGIOINT
2907 sys_siglist[SIGIOINT] = "I/O intervention required";
2908# endif
2909# ifdef SIGIOT
2910 sys_siglist[SIGIOT] = "IOT trap";
2911# endif
2912# ifdef SIGKILL
2913 sys_siglist[SIGKILL] = "Killed";
2914# endif
2915# ifdef SIGLOST
2916 sys_siglist[SIGLOST] = "Resource lost";
2917# endif
2918# ifdef SIGLWP
2919 sys_siglist[SIGLWP] = "SIGLWP";
2920# endif
2921# ifdef SIGMSG
2922 sys_siglist[SIGMSG] = "Monitor mode data available";
2923# endif
2924# ifdef SIGPHONE
2925 sys_siglist[SIGWIND] = "SIGPHONE";
2926# endif
2927# ifdef SIGPIPE
2928 sys_siglist[SIGPIPE] = "Broken pipe";
2929# endif
2930# ifdef SIGPOLL
2931 sys_siglist[SIGPOLL] = "Pollable event occurred";
2932# endif
2933# ifdef SIGPROF
2934 sys_siglist[SIGPROF] = "Profiling timer expired";
2935# endif
2936# ifdef SIGPTY
2937 sys_siglist[SIGPTY] = "PTY I/O interrupt";
2938# endif
2939# ifdef SIGPWR
2940 sys_siglist[SIGPWR] = "Power-fail restart";
2941# endif
2942# ifdef SIGQUIT
2943 sys_siglist[SIGQUIT] = "Quit";
2944# endif
2945# ifdef SIGRETRACT
2946 sys_siglist[SIGRETRACT] = "Need to relinguish monitor mode";
2947# endif
2948# ifdef SIGSAK
2949 sys_siglist[SIGSAK] = "Secure attention";
2950# endif
2951# ifdef SIGSEGV
2952 sys_siglist[SIGSEGV] = "Segmentation violation";
2953# endif
2954# ifdef SIGSOUND
2955 sys_siglist[SIGSOUND] = "Sound completed";
2956# endif
2957# ifdef SIGSTOP
2958 sys_siglist[SIGSTOP] = "Stopped (signal)";
2959# endif
2960# ifdef SIGSTP
2961 sys_siglist[SIGSTP] = "Stopped (user)";
2962# endif
2963# ifdef SIGSYS
2964 sys_siglist[SIGSYS] = "Bad argument to system call";
2965# endif
2966# ifdef SIGTERM
2967 sys_siglist[SIGTERM] = "Terminated";
2968# endif
2969# ifdef SIGTHAW
2970 sys_siglist[SIGTHAW] = "SIGTHAW";
2971# endif
2972# ifdef SIGTRAP
2973 sys_siglist[SIGTRAP] = "Trace/breakpoint trap";
2974# endif
2975# ifdef SIGTSTP
2976 sys_siglist[SIGTSTP] = "Stopped (user)";
2977# endif
2978# ifdef SIGTTIN
2979 sys_siglist[SIGTTIN] = "Stopped (tty input)";
2980# endif
2981# ifdef SIGTTOU
2982 sys_siglist[SIGTTOU] = "Stopped (tty output)";
2983# endif
2984# ifdef SIGURG
2985 sys_siglist[SIGURG] = "Urgent I/O condition";
2986# endif
2987# ifdef SIGUSR1
2988 sys_siglist[SIGUSR1] = "User defined signal 1";
2989# endif
2990# ifdef SIGUSR2
2991 sys_siglist[SIGUSR2] = "User defined signal 2";
2992# endif
2993# ifdef SIGVTALRM
2994 sys_siglist[SIGVTALRM] = "Virtual timer expired";
2995# endif
2996# ifdef SIGWAITING
2997 sys_siglist[SIGWAITING] = "Process's LWPs are blocked";
2998# endif
2999# ifdef SIGWINCH
3000 sys_siglist[SIGWINCH] = "Window size changed";
3001# endif
3002# ifdef SIGWIND
3003 sys_siglist[SIGWIND] = "SIGWIND";
3004# endif
3005# ifdef SIGXCPU
3006 sys_siglist[SIGXCPU] = "CPU time limit exceeded";
3007# endif
3008# ifdef SIGXFSZ
3009 sys_siglist[SIGXFSZ] = "File size limit exceeded";
3010# endif
3011 }
3012#endif /* !defined HAVE_STRSIGNAL && !defined SYS_SIGLIST_DECLARED */
3013}
3014\f
3015#ifndef HAVE_RANDOM
3016#ifdef random
3017#define HAVE_RANDOM
3018#endif
3019#endif
3020
3021/* Figure out how many bits the system's random number generator uses.
3022 `random' and `lrand48' are assumed to return 31 usable bits.
3023 BSD `rand' returns a 31 bit value but the low order bits are unusable;
3024 so we'll shift it and treat it like the 15-bit USG `rand'. */
3025
3026#ifndef RAND_BITS
3027# ifdef HAVE_RANDOM
3028# define RAND_BITS 31
3029# else /* !HAVE_RANDOM */
3030# ifdef HAVE_LRAND48
3031# define RAND_BITS 31
3032# define random lrand48
3033# else /* !HAVE_LRAND48 */
3034# define RAND_BITS 15
3035# if RAND_MAX == 32767
3036# define random rand
3037# else /* RAND_MAX != 32767 */
3038# if RAND_MAX == 2147483647
3039# define random() (rand () >> 16)
3040# else /* RAND_MAX != 2147483647 */
3041# ifdef USG
3042# define random rand
3043# else
3044# define random() (rand () >> 16)
3045# endif /* !USG */
3046# endif /* RAND_MAX != 2147483647 */
3047# endif /* RAND_MAX != 32767 */
3048# endif /* !HAVE_LRAND48 */
3049# endif /* !HAVE_RANDOM */
3050#endif /* !RAND_BITS */
3051
3052void
3053seed_random (arg)
3054 long arg;
3055{
3056#ifdef HAVE_RANDOM
3057 srandom ((unsigned int)arg);
3058#else
3059# ifdef HAVE_LRAND48
3060 srand48 (arg);
3061# else
3062 srand ((unsigned int)arg);
3063# endif
3064#endif
3065}
3066
3067/*
3068 * Build a full Emacs-sized word out of whatever we've got.
3069 * This suffices even for a 64-bit architecture with a 15-bit rand.
3070 */
3071long
3072get_random ()
3073{
3074 long val = random ();
3075#if VALBITS > RAND_BITS
3076 val = (val << RAND_BITS) ^ random ();
3077#if VALBITS > 2*RAND_BITS
3078 val = (val << RAND_BITS) ^ random ();
3079#if VALBITS > 3*RAND_BITS
3080 val = (val << RAND_BITS) ^ random ();
3081#if VALBITS > 4*RAND_BITS
3082 val = (val << RAND_BITS) ^ random ();
3083#endif /* need at least 5 */
3084#endif /* need at least 4 */
3085#endif /* need at least 3 */
3086#endif /* need at least 2 */
3087 return val & ((1L << VALBITS) - 1);
3088}
3089\f
3090#ifdef WRONG_NAME_INSQUE
3091
3092insque (q,p)
3093 caddr_t q,p;
3094{
3095 _insque (q,p);
3096}
3097
3098#endif
3099\f
3100#ifdef VMS
3101
3102#ifdef getenv
3103/* If any place else asks for the TERM variable,
3104 allow it to be overridden with the EMACS_TERM variable
3105 before attempting to translate the logical name TERM. As a last
3106 resort, ask for VAX C's special idea of the TERM variable. */
3107#undef getenv
3108char *
3109sys_getenv (name)
3110 char *name;
3111{
3112 register char *val;
3113 static char buf[256];
3114 static struct dsc$descriptor_s equiv
3115 = {sizeof (buf), DSC$K_DTYPE_T, DSC$K_CLASS_S, buf};
3116 static struct dsc$descriptor_s d_name
3117 = {0, DSC$K_DTYPE_T, DSC$K_CLASS_S, 0};
3118 short eqlen;
3119
3120 if (!strcmp (name, "TERM"))
3121 {
3122 val = (char *) getenv ("EMACS_TERM");
3123 if (val)
3124 return val;
3125 }
3126
3127 d_name.dsc$w_length = strlen (name);
3128 d_name.dsc$a_pointer = name;
3129 if (LIB$SYS_TRNLOG (&d_name, &eqlen, &equiv) == 1)
3130 {
3131 char *str = (char *) xmalloc (eqlen + 1);
3132 bcopy (buf, str, eqlen);
3133 str[eqlen] = '\0';
3134 /* This is a storage leak, but a pain to fix. With luck,
3135 no one will ever notice. */
3136 return str;
3137 }
3138 return (char *) getenv (name);
3139}
3140#endif /* getenv */
3141
3142#ifdef abort
3143/* Since VMS doesn't believe in core dumps, the only way to debug this beast is
3144 to force a call on the debugger from within the image. */
3145#undef abort
3146sys_abort ()
3147{
3148 reset_sys_modes ();
3149 LIB$SIGNAL (SS$_DEBUG);
3150}
3151#endif /* abort */
3152#endif /* VMS */
3153\f
3154#ifdef VMS
3155#ifdef LINK_CRTL_SHARE
3156#ifdef SHARABLE_LIB_BUG
3157/* Variables declared noshare and initialized in sharable libraries
3158 cannot be shared. The VMS linker incorrectly forces you to use a private
3159 version which is uninitialized... If not for this "feature", we
3160 could use the C library definition of sys_nerr and sys_errlist. */
3161int sys_nerr = 35;
3162char *sys_errlist[] =
3163 {
3164 "error 0",
3165 "not owner",
3166 "no such file or directory",
3167 "no such process",
3168 "interrupted system call",
3169 "i/o error",
3170 "no such device or address",
3171 "argument list too long",
3172 "exec format error",
3173 "bad file number",
3174 "no child process",
3175 "no more processes",
3176 "not enough memory",
3177 "permission denied",
3178 "bad address",
3179 "block device required",
3180 "mount devices busy",
3181 "file exists",
3182 "cross-device link",
3183 "no such device",
3184 "not a directory",
3185 "is a directory",
3186 "invalid argument",
3187 "file table overflow",
3188 "too many open files",
3189 "not a typewriter",
3190 "text file busy",
3191 "file too big",
3192 "no space left on device",
3193 "illegal seek",
3194 "read-only file system",
3195 "too many links",
3196 "broken pipe",
3197 "math argument",
3198 "result too large",
3199 "I/O stream empty",
3200 "vax/vms specific error code nontranslatable error"
3201 };
3202#endif /* SHARABLE_LIB_BUG */
3203#endif /* LINK_CRTL_SHARE */
3204#endif /* VMS */
3205
3206#ifndef HAVE_STRERROR
3207#ifndef WINDOWSNT
3208char *
3209strerror (errnum)
3210 int errnum;
3211{
3212 extern char *sys_errlist[];
3213 extern int sys_nerr;
3214
3215 if (errnum >= 0 && errnum < sys_nerr)
3216 return sys_errlist[errnum];
3217 return (char *) "Unknown error";
3218}
3219#endif /* not WINDOWSNT */
3220#endif /* ! HAVE_STRERROR */
3221\f
3222int
3223emacs_open (path, oflag, mode)
3224 char *path;
3225 int oflag, mode;
3226{
3227 register int rtnval;
3228
3229#ifdef BSD4_1
3230 if (oflag & O_CREAT)
3231 return creat (path, mode);
3232#endif
3233
3234 while ((rtnval = open (path, oflag, mode)) == -1
3235 && (errno == EINTR));
3236 return (rtnval);
3237}
3238
3239int
3240emacs_close (fd)
3241 int fd;
3242{
3243 int did_retry = 0;
3244 register int rtnval;
3245
3246 while ((rtnval = close (fd)) == -1
3247 && (errno == EINTR))
3248 did_retry = 1;
3249
3250 /* If close is interrupted SunOS 4.1 may or may not have closed the
3251 file descriptor. If it did the second close will fail with
3252 errno = EBADF. That means we have succeeded. */
3253 if (rtnval == -1 && did_retry && errno == EBADF)
3254 return 0;
3255
3256 return rtnval;
3257}
3258
3259int
3260emacs_read (fildes, buf, nbyte)
3261 int fildes;
3262 char *buf;
3263 unsigned int nbyte;
3264{
3265 register int rtnval;
3266
3267 while ((rtnval = read (fildes, buf, nbyte)) == -1
3268 && (errno == EINTR));
3269 return (rtnval);
3270}
3271
3272int
3273emacs_write (fildes, buf, nbyte)
3274 int fildes;
3275 char *buf;
3276 unsigned int nbyte;
3277{
3278 register int rtnval, bytes_written;
3279
3280 bytes_written = 0;
3281
3282 while (nbyte > 0)
3283 {
3284 rtnval = write (fildes, buf, nbyte);
3285
3286 if (rtnval == -1)
3287 {
3288 if (errno == EINTR)
3289 continue;
3290 else
3291 return (bytes_written ? bytes_written : -1);
3292 }
3293
3294 buf += rtnval;
3295 nbyte -= rtnval;
3296 bytes_written += rtnval;
3297 }
3298 return (bytes_written);
3299}
3300\f
3301#ifndef HAVE_VFORK
3302#ifndef WINDOWSNT
3303/*
3304 * Substitute fork for vfork on USG flavors.
3305 */
3306
3307VFORK_RETURN_TYPE
3308vfork ()
3309{
3310 return (fork ());
3311}
3312#endif /* not WINDOWSNT */
3313#endif /* not HAVE_VFORK */
3314\f
3315#ifdef USG
3316/*
3317 * All of the following are for USG.
3318 *
3319 * On USG systems the system calls are INTERRUPTIBLE by signals
3320 * that the user program has elected to catch. Thus the system call
3321 * must be retried in these cases. To handle this without massive
3322 * changes in the source code, we remap the standard system call names
3323 * to names for our own functions in sysdep.c that do the system call
3324 * with retries. Actually, for portability reasons, it is good
3325 * programming practice, as this example shows, to limit all actual
3326 * system calls to a single occurrence in the source. Sure, this
3327 * adds an extra level of function call overhead but it is almost
3328 * always negligible. Fred Fish, Unisoft Systems Inc.
3329 */
3330
3331/*
3332 * Warning, this function may not duplicate 4.2 action properly
3333 * under error conditions.
3334 */
3335
3336#ifndef MAXPATHLEN
3337/* In 4.1, param.h fails to define this. */
3338#define MAXPATHLEN 1024
3339#endif
3340
3341#ifndef HAVE_GETWD
3342
3343char *
3344getwd (pathname)
3345 char *pathname;
3346{
3347 char *npath, *spath;
3348 extern char *getcwd ();
3349
3350 BLOCK_INPUT; /* getcwd uses malloc */
3351 spath = npath = getcwd ((char *) 0, MAXPATHLEN);
3352 if (spath == 0)
3353 return spath;
3354 /* On Altos 3068, getcwd can return @hostname/dir, so discard
3355 up to first slash. Should be harmless on other systems. */
3356 while (*npath && *npath != '/')
3357 npath++;
3358 strcpy (pathname, npath);
3359 free (spath); /* getcwd uses malloc */
3360 UNBLOCK_INPUT;
3361 return pathname;
3362}
3363
3364#endif /* HAVE_GETWD */
3365
3366/*
3367 * Emulate rename using unlink/link. Note that this is
3368 * only partially correct. Also, doesn't enforce restriction
3369 * that files be of same type (regular->regular, dir->dir, etc).
3370 */
3371
3372#ifndef HAVE_RENAME
3373
3374rename (from, to)
3375 const char *from;
3376 const char *to;
3377{
3378 if (access (from, 0) == 0)
3379 {
3380 unlink (to);
3381 if (link (from, to) == 0)
3382 if (unlink (from) == 0)
3383 return (0);
3384 }
3385 return (-1);
3386}
3387
3388#endif
3389
3390
3391#ifdef HPUX
3392#ifndef HAVE_PERROR
3393
3394/* HPUX curses library references perror, but as far as we know
3395 it won't be called. Anyway this definition will do for now. */
3396
3397perror ()
3398{
3399}
3400
3401#endif /* not HAVE_PERROR */
3402#endif /* HPUX */
3403
3404#ifndef HAVE_DUP2
3405
3406/*
3407 * Emulate BSD dup2. First close newd if it already exists.
3408 * Then, attempt to dup oldd. If not successful, call dup2 recursively
3409 * until we are, then close the unsuccessful ones.
3410 */
3411
3412dup2 (oldd, newd)
3413 int oldd;
3414 int newd;
3415{
3416 register int fd, ret;
3417
3418 emacs_close (newd);
3419
3420#ifdef F_DUPFD
3421 return fcntl (oldd, F_DUPFD, newd);
3422#else
3423 fd = dup (old);
3424 if (fd == -1)
3425 return -1;
3426 if (fd == new)
3427 return new;
3428 ret = dup2 (old,new);
3429 emacs_close (fd);
3430 return ret;
3431#endif
3432}
3433
3434#endif /* not HAVE_DUP2 */
3435
3436/*
3437 * Gettimeofday. Simulate as much as possible. Only accurate
3438 * to nearest second. Emacs doesn't use tzp so ignore it for now.
3439 * Only needed when subprocesses are defined.
3440 */
3441
3442#ifdef subprocesses
3443#ifndef VMS
3444#ifndef HAVE_GETTIMEOFDAY
3445#ifdef HAVE_TIMEVAL
3446
3447/* ARGSUSED */
3448int
3449gettimeofday (tp, tzp)
3450 struct timeval *tp;
3451 struct timezone *tzp;
3452{
3453 extern long time ();
3454
3455 tp->tv_sec = time ((long *)0);
3456 tp->tv_usec = 0;
3457 if (tzp != 0)
3458 tzp->tz_minuteswest = -1;
3459 return 0;
3460}
3461
3462#endif
3463#endif
3464#endif
3465#endif /* subprocess && !HAVE_GETTIMEOFDAY && HAVE_TIMEVAL && !VMS */
3466
3467/*
3468 * This function will go away as soon as all the stubs fixed. (fnf)
3469 */
3470
3471void
3472croak (badfunc)
3473 char *badfunc;
3474{
3475 printf ("%s not yet implemented\r\n", badfunc);
3476 reset_sys_modes ();
3477 exit (1);
3478}
3479
3480#endif /* USG */
3481\f
3482/* Directory routines for systems that don't have them. */
3483
3484#ifdef SYSV_SYSTEM_DIR
3485
3486#include <dirent.h>
3487
3488#if defined (BROKEN_CLOSEDIR) || !defined (HAVE_CLOSEDIR)
3489
3490int
3491closedir (dirp)
3492 register DIR *dirp; /* stream from opendir */
3493{
3494 int rtnval;
3495
3496 rtnval = emacs_close (dirp->dd_fd);
3497
3498 /* Some systems (like Solaris) allocate the buffer and the DIR all
3499 in one block. Why in the world are we freeing this ourselves
3500 anyway? */
3501#if ! (defined (sun) && defined (USG5_4))
3502 xfree ((char *) dirp->dd_buf); /* directory block defined in <dirent.h> */
3503#endif
3504 xfree ((char *) dirp);
3505
3506 return rtnval;
3507}
3508#endif /* BROKEN_CLOSEDIR or not HAVE_CLOSEDIR */
3509#endif /* SYSV_SYSTEM_DIR */
3510
3511#ifdef NONSYSTEM_DIR_LIBRARY
3512
3513DIR *
3514opendir (filename)
3515 char *filename; /* name of directory */
3516{
3517 register DIR *dirp; /* -> malloc'ed storage */
3518 register int fd; /* file descriptor for read */
3519 struct stat sbuf; /* result of fstat */
3520
3521 fd = emacs_open (filename, O_RDONLY, 0);
3522 if (fd < 0)
3523 return 0;
3524
3525 BLOCK_INPUT;
3526 if (fstat (fd, &sbuf) < 0
3527 || (sbuf.st_mode & S_IFMT) != S_IFDIR
3528 || (dirp = (DIR *) malloc (sizeof (DIR))) == 0)
3529 {
3530 emacs_close (fd);
3531 UNBLOCK_INPUT;
3532 return 0; /* bad luck today */
3533 }
3534 UNBLOCK_INPUT;
3535
3536 dirp->dd_fd = fd;
3537 dirp->dd_loc = dirp->dd_size = 0; /* refill needed */
3538
3539 return dirp;
3540}
3541
3542void
3543closedir (dirp)
3544 register DIR *dirp; /* stream from opendir */
3545{
3546 emacs_close (dirp->dd_fd);
3547 xfree ((char *) dirp);
3548}
3549
3550
3551#ifndef VMS
3552#define DIRSIZ 14
3553struct olddir
3554 {
3555 ino_t od_ino; /* inode */
3556 char od_name[DIRSIZ]; /* filename */
3557 };
3558#endif /* not VMS */
3559
3560struct direct dir_static; /* simulated directory contents */
3561
3562/* ARGUSED */
3563struct direct *
3564readdir (dirp)
3565 register DIR *dirp; /* stream from opendir */
3566{
3567#ifndef VMS
3568 register struct olddir *dp; /* -> directory data */
3569#else /* VMS */
3570 register struct dir$_name *dp; /* -> directory data */
3571 register struct dir$_version *dv; /* -> version data */
3572#endif /* VMS */
3573
3574 for (; ;)
3575 {
3576 if (dirp->dd_loc >= dirp->dd_size)
3577 dirp->dd_loc = dirp->dd_size = 0;
3578
3579 if (dirp->dd_size == 0 /* refill buffer */
3580 && (dirp->dd_size = emacs_read (dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ)) <= 0)
3581 return 0;
3582
3583#ifndef VMS
3584 dp = (struct olddir *) &dirp->dd_buf[dirp->dd_loc];
3585 dirp->dd_loc += sizeof (struct olddir);
3586
3587 if (dp->od_ino != 0) /* not deleted entry */
3588 {
3589 dir_static.d_ino = dp->od_ino;
3590 strncpy (dir_static.d_name, dp->od_name, DIRSIZ);
3591 dir_static.d_name[DIRSIZ] = '\0';
3592 dir_static.d_namlen = strlen (dir_static.d_name);
3593 dir_static.d_reclen = sizeof (struct direct)
3594 - MAXNAMLEN + 3
3595 + dir_static.d_namlen - dir_static.d_namlen % 4;
3596 return &dir_static; /* -> simulated structure */
3597 }
3598#else /* VMS */
3599 dp = (struct dir$_name *) dirp->dd_buf;
3600 if (dirp->dd_loc == 0)
3601 dirp->dd_loc = (dp->dir$b_namecount&1) ? dp->dir$b_namecount + 1
3602 : dp->dir$b_namecount;
3603 dv = (struct dir$_version *)&dp->dir$t_name[dirp->dd_loc];
3604 dir_static.d_ino = dv->dir$w_fid_num;
3605 dir_static.d_namlen = dp->dir$b_namecount;
3606 dir_static.d_reclen = sizeof (struct direct)
3607 - MAXNAMLEN + 3
3608 + dir_static.d_namlen - dir_static.d_namlen % 4;
3609 strncpy (dir_static.d_name, dp->dir$t_name, dp->dir$b_namecount);
3610 dir_static.d_name[dir_static.d_namlen] = '\0';
3611 dirp->dd_loc = dirp->dd_size; /* only one record at a time */
3612 return &dir_static;
3613#endif /* VMS */
3614 }
3615}
3616
3617#ifdef VMS
3618/* readdirver is just like readdir except it returns all versions of a file
3619 as separate entries. */
3620
3621/* ARGUSED */
3622struct direct *
3623readdirver (dirp)
3624 register DIR *dirp; /* stream from opendir */
3625{
3626 register struct dir$_name *dp; /* -> directory data */
3627 register struct dir$_version *dv; /* -> version data */
3628
3629 if (dirp->dd_loc >= dirp->dd_size - sizeof (struct dir$_name))
3630 dirp->dd_loc = dirp->dd_size = 0;
3631
3632 if (dirp->dd_size == 0 /* refill buffer */
3633 && (dirp->dd_size = sys_read (dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ)) <= 0)
3634 return 0;
3635
3636 dp = (struct dir$_name *) dirp->dd_buf;
3637 if (dirp->dd_loc == 0)
3638 dirp->dd_loc = (dp->dir$b_namecount & 1) ? dp->dir$b_namecount + 1
3639 : dp->dir$b_namecount;
3640 dv = (struct dir$_version *) &dp->dir$t_name[dirp->dd_loc];
3641 strncpy (dir_static.d_name, dp->dir$t_name, dp->dir$b_namecount);
3642 sprintf (&dir_static.d_name[dp->dir$b_namecount], ";%d", dv->dir$w_version);
3643 dir_static.d_namlen = strlen (dir_static.d_name);
3644 dir_static.d_ino = dv->dir$w_fid_num;
3645 dir_static.d_reclen = sizeof (struct direct) - MAXNAMLEN + 3
3646 + dir_static.d_namlen - dir_static.d_namlen % 4;
3647 dirp->dd_loc = ((char *) (++dv) - dp->dir$t_name);
3648 return &dir_static;
3649}
3650
3651#endif /* VMS */
3652
3653#endif /* NONSYSTEM_DIR_LIBRARY */
3654
3655\f
3656int
3657set_file_times (filename, atime, mtime)
3658 char *filename;
3659 EMACS_TIME atime, mtime;
3660{
3661#ifdef HAVE_UTIMES
3662 struct timeval tv[2];
3663 tv[0] = atime;
3664 tv[1] = mtime;
3665 return utimes (filename, tv);
3666#else /* not HAVE_UTIMES */
3667 struct utimbuf utb;
3668 utb.actime = EMACS_SECS (atime);
3669 utb.modtime = EMACS_SECS (mtime);
3670 return utime (filename, &utb);
3671#endif /* not HAVE_UTIMES */
3672}
3673\f
3674/* mkdir and rmdir functions, for systems which don't have them. */
3675
3676#ifndef HAVE_MKDIR
3677/*
3678 * Written by Robert Rother, Mariah Corporation, August 1985.
3679 *
3680 * If you want it, it's yours. All I ask in return is that if you
3681 * figure out how to do this in a Bourne Shell script you send me
3682 * a copy.
3683 * sdcsvax!rmr or rmr@uscd
3684 *
3685 * Severely hacked over by John Gilmore to make a 4.2BSD compatible
3686 * subroutine. 11Mar86; hoptoad!gnu
3687 *
3688 * Modified by rmtodd@uokmax 6-28-87 -- when making an already existing dir,
3689 * subroutine didn't return EEXIST. It does now.
3690 */
3691
3692/*
3693 * Make a directory.
3694 */
3695#ifdef MKDIR_PROTOTYPE
3696MKDIR_PROTOTYPE
3697#else
3698int
3699mkdir (dpath, dmode)
3700 char *dpath;
3701 int dmode;
3702#endif
3703{
3704 int cpid, status, fd;
3705 struct stat statbuf;
3706
3707 if (stat (dpath, &statbuf) == 0)
3708 {
3709 errno = EEXIST; /* Stat worked, so it already exists */
3710 return -1;
3711 }
3712
3713 /* If stat fails for a reason other than non-existence, return error */
3714 if (errno != ENOENT)
3715 return -1;
3716
3717 synch_process_alive = 1;
3718 switch (cpid = fork ())
3719 {
3720
3721 case -1: /* Error in fork */
3722 return (-1); /* Errno is set already */
3723
3724 case 0: /* Child process */
3725 /*
3726 * Cheap hack to set mode of new directory. Since this
3727 * child process is going away anyway, we zap its umask.
3728 * FIXME, this won't suffice to set SUID, SGID, etc. on this
3729 * directory. Does anybody care?
3730 */
3731 status = umask (0); /* Get current umask */
3732 status = umask (status | (0777 & ~dmode)); /* Set for mkdir */
3733 fd = emacs_open ("/dev/null", O_RDWR, 0);
3734 if (fd >= 0)
3735 {
3736 dup2 (fd, 0);
3737 dup2 (fd, 1);
3738 dup2 (fd, 2);
3739 }
3740 execl ("/bin/mkdir", "mkdir", dpath, (char *) 0);
3741 _exit (-1); /* Can't exec /bin/mkdir */
3742
3743 default: /* Parent process */
3744 wait_for_termination (cpid);
3745 }
3746
3747 if (synch_process_death != 0 || synch_process_retcode != 0)
3748 {
3749 errno = EIO; /* We don't know why, but */
3750 return -1; /* /bin/mkdir failed */
3751 }
3752
3753 return 0;
3754}
3755#endif /* not HAVE_MKDIR */
3756
3757#ifndef HAVE_RMDIR
3758int
3759rmdir (dpath)
3760 char *dpath;
3761{
3762 int cpid, status, fd;
3763 struct stat statbuf;
3764
3765 if (stat (dpath, &statbuf) != 0)
3766 {
3767 /* Stat just set errno. We don't have to */
3768 return -1;
3769 }
3770
3771 synch_process_alive = 1;
3772 switch (cpid = fork ())
3773 {
3774
3775 case -1: /* Error in fork */
3776 return (-1); /* Errno is set already */
3777
3778 case 0: /* Child process */
3779 fd = emacs_open ("/dev/null", O_RDWR, 0);
3780 if (fd >= 0)
3781 {
3782 dup2 (fd, 0);
3783 dup2 (fd, 1);
3784 dup2 (fd, 2);
3785 }
3786 execl ("/bin/rmdir", "rmdir", dpath, (char *) 0);
3787 _exit (-1); /* Can't exec /bin/rmdir */
3788
3789 default: /* Parent process */
3790 wait_for_termination (cpid);
3791 }
3792
3793 if (synch_process_death != 0 || synch_process_retcode != 0)
3794 {
3795 errno = EIO; /* We don't know why, but */
3796 return -1; /* /bin/rmdir failed */
3797 }
3798
3799 return 0;
3800}
3801#endif /* !HAVE_RMDIR */
3802
3803
3804\f
3805/* Functions for VMS */
3806#ifdef VMS
3807#include "vms-pwd.h"
3808#include <acldef.h>
3809#include <chpdef.h>
3810#include <jpidef.h>
3811
3812/* Return as a string the VMS error string pertaining to STATUS.
3813 Reuses the same static buffer each time it is called. */
3814
3815char *
3816vmserrstr (status)
3817 int status; /* VMS status code */
3818{
3819 int bufadr[2];
3820 short len;
3821 static char buf[257];
3822
3823 bufadr[0] = sizeof buf - 1;
3824 bufadr[1] = (int) buf;
3825 if (! (SYS$GETMSG (status, &len, bufadr, 0x1, 0) & 1))
3826 return "untranslatable VMS error status";
3827 buf[len] = '\0';
3828 return buf;
3829}
3830
3831#ifdef access
3832#undef access
3833
3834/* The following is necessary because 'access' emulation by VMS C (2.0) does
3835 * not work correctly. (It also doesn't work well in version 2.3.)
3836 */
3837
3838#ifdef VMS4_4
3839
3840#define DESCRIPTOR(name,string) struct dsc$descriptor_s name = \
3841 { strlen (string), DSC$K_DTYPE_T, DSC$K_CLASS_S, string }
3842
3843typedef union {
3844 struct {
3845 unsigned short s_buflen;
3846 unsigned short s_code;
3847 char *s_bufadr;
3848 unsigned short *s_retlenadr;
3849 } s;
3850 int end;
3851} item;
3852#define buflen s.s_buflen
3853#define code s.s_code
3854#define bufadr s.s_bufadr
3855#define retlenadr s.s_retlenadr
3856
3857#define R_OK 4 /* test for read permission */
3858#define W_OK 2 /* test for write permission */
3859#define X_OK 1 /* test for execute (search) permission */
3860#define F_OK 0 /* test for presence of file */
3861
3862int
3863sys_access (path, mode)
3864 char *path;
3865 int mode;
3866{
3867 static char *user = NULL;
3868 char dir_fn[512];
3869
3870 /* translate possible directory spec into .DIR file name, so brain-dead
3871 * access can treat the directory like a file. */
3872 if (directory_file_name (path, dir_fn))
3873 path = dir_fn;
3874
3875 if (mode == F_OK)
3876 return access (path, mode);
3877 if (user == NULL && (user = (char *) getenv ("USER")) == NULL)
3878 return -1;
3879 {
3880 int stat;
3881 int flags;
3882 int acces;
3883 unsigned short int dummy;
3884 item itemlst[3];
3885 static int constant = ACL$C_FILE;
3886 DESCRIPTOR (path_desc, path);
3887 DESCRIPTOR (user_desc, user);
3888
3889 flags = 0;
3890 acces = 0;
3891 if ((mode & X_OK) && ((stat = access (path, mode)) < 0 || mode == X_OK))
3892 return stat;
3893 if (mode & R_OK)
3894 acces |= CHP$M_READ;
3895 if (mode & W_OK)
3896 acces |= CHP$M_WRITE;
3897 itemlst[0].buflen = sizeof (int);
3898 itemlst[0].code = CHP$_FLAGS;
3899 itemlst[0].bufadr = (char *) &flags;
3900 itemlst[0].retlenadr = &dummy;
3901 itemlst[1].buflen = sizeof (int);
3902 itemlst[1].code = CHP$_ACCESS;
3903 itemlst[1].bufadr = (char *) &acces;
3904 itemlst[1].retlenadr = &dummy;
3905 itemlst[2].end = CHP$_END;
3906 stat = SYS$CHECK_ACCESS (&constant, &path_desc, &user_desc, itemlst);
3907 return stat == SS$_NORMAL ? 0 : -1;
3908 }
3909}
3910
3911#else /* not VMS4_4 */
3912
3913#include <prvdef.h>
3914#define ACE$M_WRITE 2
3915#define ACE$C_KEYID 1
3916
3917static unsigned short memid, grpid;
3918static unsigned int uic;
3919
3920/* Called from init_sys_modes, so it happens not very often
3921 but at least each time Emacs is loaded. */
3922void
3923sys_access_reinit ()
3924{
3925 uic = 0;
3926}
3927
3928int
3929sys_access (filename, type)
3930 char * filename;
3931 int type;
3932{
3933 struct FAB fab;
3934 struct XABPRO xab;
3935 int status, size, i, typecode, acl_controlled;
3936 unsigned int *aclptr, *aclend, aclbuf[60];
3937 union prvdef prvmask;
3938
3939 /* Get UIC and GRP values for protection checking. */
3940 if (uic == 0)
3941 {
3942 status = LIB$GETJPI (&JPI$_UIC, 0, 0, &uic, 0, 0);
3943 if (! (status & 1))
3944 return -1;
3945 memid = uic & 0xFFFF;
3946 grpid = uic >> 16;
3947 }
3948
3949 if (type != 2) /* not checking write access */
3950 return access (filename, type);
3951
3952 /* Check write protection. */
3953
3954#define CHECKPRIV(bit) (prvmask.bit)
3955#define WRITABLE(field) (! ((xab.xab$w_pro >> field) & XAB$M_NOWRITE))
3956
3957 /* Find privilege bits */
3958 status = SYS$SETPRV (0, 0, 0, prvmask);
3959 if (! (status & 1))
3960 error ("Unable to find privileges: %s", vmserrstr (status));
3961 if (CHECKPRIV (PRV$V_BYPASS))
3962 return 0; /* BYPASS enabled */
3963 fab = cc$rms_fab;
3964 fab.fab$b_fac = FAB$M_GET;
3965 fab.fab$l_fna = filename;
3966 fab.fab$b_fns = strlen (filename);
3967 fab.fab$l_xab = &xab;
3968 xab = cc$rms_xabpro;
3969 xab.xab$l_aclbuf = aclbuf;
3970 xab.xab$w_aclsiz = sizeof (aclbuf);
3971 status = SYS$OPEN (&fab, 0, 0);
3972 if (! (status & 1))
3973 return -1;
3974 SYS$CLOSE (&fab, 0, 0);
3975 /* Check system access */
3976 if (CHECKPRIV (PRV$V_SYSPRV) && WRITABLE (XAB$V_SYS))
3977 return 0;
3978 /* Check ACL entries, if any */
3979 acl_controlled = 0;
3980 if (xab.xab$w_acllen > 0)
3981 {
3982 aclptr = aclbuf;
3983 aclend = &aclbuf[xab.xab$w_acllen / 4];
3984 while (*aclptr && aclptr < aclend)
3985 {
3986 size = (*aclptr & 0xff) / 4;
3987 typecode = (*aclptr >> 8) & 0xff;
3988 if (typecode == ACE$C_KEYID)
3989 for (i = size - 1; i > 1; i--)
3990 if (aclptr[i] == uic)
3991 {
3992 acl_controlled = 1;
3993 if (aclptr[1] & ACE$M_WRITE)
3994 return 0; /* Write access through ACL */
3995 }
3996 aclptr = &aclptr[size];
3997 }
3998 if (acl_controlled) /* ACL specified, prohibits write access */
3999 return -1;
4000 }
4001 /* No ACL entries specified, check normal protection */
4002 if (WRITABLE (XAB$V_WLD)) /* World writable */
4003 return 0;
4004 if (WRITABLE (XAB$V_GRP) &&
4005 (unsigned short) (xab.xab$l_uic >> 16) == grpid)
4006 return 0; /* Group writable */
4007 if (WRITABLE (XAB$V_OWN) &&
4008 (xab.xab$l_uic & 0xFFFF) == memid)
4009 return 0; /* Owner writable */
4010
4011 return -1; /* Not writable */
4012}
4013#endif /* not VMS4_4 */
4014#endif /* access */
4015
4016static char vtbuf[NAM$C_MAXRSS+1];
4017
4018/* translate a vms file spec to a unix path */
4019char *
4020sys_translate_vms (vfile)
4021 char * vfile;
4022{
4023 char * p;
4024 char * targ;
4025
4026 if (!vfile)
4027 return 0;
4028
4029 targ = vtbuf;
4030
4031 /* leading device or logical name is a root directory */
4032 if (p = strchr (vfile, ':'))
4033 {
4034 *targ++ = '/';
4035 while (vfile < p)
4036 *targ++ = *vfile++;
4037 vfile++;
4038 *targ++ = '/';
4039 }
4040 p = vfile;
4041 if (*p == '[' || *p == '<')
4042 {
4043 while (*++vfile != *p + 2)
4044 switch (*vfile)
4045 {
4046 case '.':
4047 if (vfile[-1] == *p)
4048 *targ++ = '.';
4049 *targ++ = '/';
4050 break;
4051
4052 case '-':
4053 *targ++ = '.';
4054 *targ++ = '.';
4055 break;
4056
4057 default:
4058 *targ++ = *vfile;
4059 break;
4060 }
4061 vfile++;
4062 *targ++ = '/';
4063 }
4064 while (*vfile)
4065 *targ++ = *vfile++;
4066
4067 return vtbuf;
4068}
4069
4070static char utbuf[NAM$C_MAXRSS+1];
4071
4072/* translate a unix path to a VMS file spec */
4073char *
4074sys_translate_unix (ufile)
4075 char * ufile;
4076{
4077 int slash_seen = 0;
4078 char *p;
4079 char * targ;
4080
4081 if (!ufile)
4082 return 0;
4083
4084 targ = utbuf;
4085
4086 if (*ufile == '/')
4087 {
4088 ufile++;
4089 }
4090
4091 while (*ufile)
4092 {
4093 switch (*ufile)
4094 {
4095 case '/':
4096 if (slash_seen)
4097 if (index (&ufile[1], '/'))
4098 *targ++ = '.';
4099 else
4100 *targ++ = ']';
4101 else
4102 {
4103 *targ++ = ':';
4104 if (index (&ufile[1], '/'))
4105 *targ++ = '[';
4106 slash_seen = 1;
4107 }
4108 break;
4109
4110 case '.':
4111 if (strncmp (ufile, "./", 2) == 0)
4112 {
4113 if (!slash_seen)
4114 {
4115 *targ++ = '[';
4116 slash_seen = 1;
4117 }
4118 ufile++; /* skip the dot */
4119 if (index (&ufile[1], '/'))
4120 *targ++ = '.';
4121 else
4122 *targ++ = ']';
4123 }
4124 else if (strncmp (ufile, "../", 3) == 0)
4125 {
4126 if (!slash_seen)
4127 {
4128 *targ++ = '[';
4129 slash_seen = 1;
4130 }
4131 *targ++ = '-';
4132 ufile += 2; /* skip the dots */
4133 if (index (&ufile[1], '/'))
4134 *targ++ = '.';
4135 else
4136 *targ++ = ']';
4137 }
4138 else
4139 *targ++ = *ufile;
4140 break;
4141
4142 default:
4143 *targ++ = *ufile;
4144 break;
4145 }
4146 ufile++;
4147 }
4148 *targ = '\0';
4149
4150 return utbuf;
4151}
4152
4153char *
4154getwd (pathname)
4155 char *pathname;
4156{
4157 char *ptr, *val;
4158 extern char *getcwd ();
4159
4160#define MAXPATHLEN 1024
4161
4162 ptr = xmalloc (MAXPATHLEN);
4163 val = getcwd (ptr, MAXPATHLEN);
4164 if (val == 0)
4165 {
4166 xfree (ptr);
4167 return val;
4168 }
4169 strcpy (pathname, ptr);
4170 xfree (ptr);
4171
4172 return pathname;
4173}
4174
4175int
4176getppid ()
4177{
4178 long item_code = JPI$_OWNER;
4179 unsigned long parent_id;
4180 int status;
4181
4182 if (((status = LIB$GETJPI (&item_code, 0, 0, &parent_id)) & 1) == 0)
4183 {
4184 errno = EVMSERR;
4185 vaxc$errno = status;
4186 return -1;
4187 }
4188 return parent_id;
4189}
4190
4191#undef getuid
4192unsigned
4193sys_getuid ()
4194{
4195 return (getgid () << 16) | getuid ();
4196}
4197
4198#undef read
4199int
4200sys_read (fildes, buf, nbyte)
4201 int fildes;
4202 char *buf;
4203 unsigned int nbyte;
4204{
4205 return read (fildes, buf, (nbyte < MAXIOSIZE ? nbyte : MAXIOSIZE));
4206}
4207
4208#if 0
4209int
4210sys_write (fildes, buf, nbyte)
4211 int fildes;
4212 char *buf;
4213 unsigned int nbyte;
4214{
4215 register int nwrote, rtnval = 0;
4216
4217 while (nbyte > MAXIOSIZE && (nwrote = write (fildes, buf, MAXIOSIZE)) > 0) {
4218 nbyte -= nwrote;
4219 buf += nwrote;
4220 rtnval += nwrote;
4221 }
4222 if (nwrote < 0)
4223 return rtnval ? rtnval : -1;
4224 if ((nwrote = write (fildes, buf, nbyte)) < 0)
4225 return rtnval ? rtnval : -1;
4226 return (rtnval + nwrote);
4227}
4228#endif /* 0 */
4229
4230/*
4231 * VAX/VMS VAX C RTL really loses. It insists that records
4232 * end with a newline (carriage return) character, and if they
4233 * don't it adds one (nice of it isn't it!)
4234 *
4235 * Thus we do this stupidity below.
4236 */
4237
4238#undef write
4239int
4240sys_write (fildes, buf, nbytes)
4241 int fildes;
4242 char *buf;
4243 unsigned int nbytes;
4244{
4245 register char *p;
4246 register char *e;
4247 int sum = 0;
4248 struct stat st;
4249
4250 fstat (fildes, &st);
4251 p = buf;
4252 while (nbytes > 0)
4253 {
4254 int len, retval;
4255
4256 /* Handle fixed-length files with carriage control. */
4257 if (st.st_fab_rfm == FAB$C_FIX
4258 && ((st.st_fab_rat & (FAB$M_FTN | FAB$M_CR)) != 0))
4259 {
4260 len = st.st_fab_mrs;
4261 retval = write (fildes, p, min (len, nbytes));
4262 if (retval != len)
4263 return -1;
4264 retval++; /* This skips the implied carriage control */
4265 }
4266 else
4267 {
4268 e = p + min (MAXIOSIZE, nbytes) - 1;
4269 while (*e != '\n' && e > p) e--;
4270 if (p == e) /* Ok.. so here we add a newline... sigh. */
4271 e = p + min (MAXIOSIZE, nbytes) - 1;
4272 len = e + 1 - p;
4273 retval = write (fildes, p, len);
4274 if (retval != len)
4275 return -1;
4276 }
4277 p += retval;
4278 sum += retval;
4279 nbytes -= retval;
4280 }
4281 return sum;
4282}
4283
4284/* Create file NEW copying its attributes from file OLD. If
4285 OLD is 0 or does not exist, create based on the value of
4286 vms_stmlf_recfm. */
4287
4288/* Protection value the file should ultimately have.
4289 Set by create_copy_attrs, and use by rename_sansversions. */
4290static unsigned short int fab_final_pro;
4291
4292int
4293creat_copy_attrs (old, new)
4294 char *old, *new;
4295{
4296 struct FAB fab = cc$rms_fab;
4297 struct XABPRO xabpro;
4298 char aclbuf[256]; /* Choice of size is arbitrary. See below. */
4299 extern int vms_stmlf_recfm;
4300
4301 if (old)
4302 {
4303 fab.fab$b_fac = FAB$M_GET;
4304 fab.fab$l_fna = old;
4305 fab.fab$b_fns = strlen (old);
4306 fab.fab$l_xab = (char *) &xabpro;
4307 xabpro = cc$rms_xabpro;
4308 xabpro.xab$l_aclbuf = aclbuf;
4309 xabpro.xab$w_aclsiz = sizeof aclbuf;
4310 /* Call $OPEN to fill in the fab & xabpro fields. */
4311 if (SYS$OPEN (&fab, 0, 0) & 1)
4312 {
4313 SYS$CLOSE (&fab, 0, 0);
4314 fab.fab$l_alq = 0; /* zero the allocation quantity */
4315 if (xabpro.xab$w_acllen > 0)
4316 {
4317 if (xabpro.xab$w_acllen > sizeof aclbuf)
4318 /* If the acl buffer was too short, redo open with longer one.
4319 Wouldn't need to do this if there were some system imposed
4320 limit on the size of an ACL, but I can't find any such. */
4321 {
4322 xabpro.xab$l_aclbuf = (char *) alloca (xabpro.xab$w_acllen);
4323 xabpro.xab$w_aclsiz = xabpro.xab$w_acllen;
4324 if (SYS$OPEN (&fab, 0, 0) & 1)
4325 SYS$CLOSE (&fab, 0, 0);
4326 else
4327 old = 0;
4328 }
4329 }
4330 else
4331 xabpro.xab$l_aclbuf = 0;
4332 }
4333 else
4334 old = 0;
4335 }
4336 fab.fab$l_fna = new;
4337 fab.fab$b_fns = strlen (new);
4338 if (!old)
4339 {
4340 fab.fab$l_xab = 0;
4341 fab.fab$b_rfm = vms_stmlf_recfm ? FAB$C_STMLF : FAB$C_VAR;
4342 fab.fab$b_rat = FAB$M_CR;
4343 }
4344
4345 /* Set the file protections such that we will be able to manipulate
4346 this file. Once we are done writing and renaming it, we will set
4347 the protections back. */
4348 if (old)
4349 fab_final_pro = xabpro.xab$w_pro;
4350 else
4351 SYS$SETDFPROT (0, &fab_final_pro);
4352 xabpro.xab$w_pro &= 0xff0f; /* set O:rewd for now. This is set back later. */
4353
4354 /* Create the new file with either default attrs or attrs copied
4355 from old file. */
4356 if (!(SYS$CREATE (&fab, 0, 0) & 1))
4357 return -1;
4358 SYS$CLOSE (&fab, 0, 0);
4359 /* As this is a "replacement" for creat, return a file descriptor
4360 opened for writing. */
4361 return open (new, O_WRONLY);
4362}
4363
4364#ifdef creat
4365#undef creat
4366#include <varargs.h>
4367#ifdef __GNUC__
4368#ifndef va_count
4369#define va_count(X) ((X) = *(((int *) &(va_alist)) - 1))
4370#endif
4371#endif
4372
4373int
4374sys_creat (va_alist)
4375 va_dcl
4376{
4377 va_list list_incrementer;
4378 char *name;
4379 int mode;
4380 int rfd; /* related file descriptor */
4381 int fd; /* Our new file descriptor */
4382 int count;
4383 struct stat st_buf;
4384 char rfm[12];
4385 char rat[15];
4386 char mrs[13];
4387 char fsz[13];
4388 extern int vms_stmlf_recfm;
4389
4390 va_count (count);
4391 va_start (list_incrementer);
4392 name = va_arg (list_incrementer, char *);
4393 mode = va_arg (list_incrementer, int);
4394 if (count > 2)
4395 rfd = va_arg (list_incrementer, int);
4396 va_end (list_incrementer);
4397 if (count > 2)
4398 {
4399 /* Use information from the related file descriptor to set record
4400 format of the newly created file. */
4401 fstat (rfd, &st_buf);
4402 switch (st_buf.st_fab_rfm)
4403 {
4404 case FAB$C_FIX:
4405 strcpy (rfm, "rfm = fix");
4406 sprintf (mrs, "mrs = %d", st_buf.st_fab_mrs);
4407 strcpy (rat, "rat = ");
4408 if (st_buf.st_fab_rat & FAB$M_CR)
4409 strcat (rat, "cr");
4410 else if (st_buf.st_fab_rat & FAB$M_FTN)
4411 strcat (rat, "ftn");
4412 else if (st_buf.st_fab_rat & FAB$M_PRN)
4413 strcat (rat, "prn");
4414 if (st_buf.st_fab_rat & FAB$M_BLK)
4415 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4416 strcat (rat, ", blk");
4417 else
4418 strcat (rat, "blk");
4419 return creat (name, 0, rfm, rat, mrs);
4420
4421 case FAB$C_VFC:
4422 strcpy (rfm, "rfm = vfc");
4423 sprintf (fsz, "fsz = %d", st_buf.st_fab_fsz);
4424 strcpy (rat, "rat = ");
4425 if (st_buf.st_fab_rat & FAB$M_CR)
4426 strcat (rat, "cr");
4427 else if (st_buf.st_fab_rat & FAB$M_FTN)
4428 strcat (rat, "ftn");
4429 else if (st_buf.st_fab_rat & FAB$M_PRN)
4430 strcat (rat, "prn");
4431 if (st_buf.st_fab_rat & FAB$M_BLK)
4432 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4433 strcat (rat, ", blk");
4434 else
4435 strcat (rat, "blk");
4436 return creat (name, 0, rfm, rat, fsz);
4437
4438 case FAB$C_STM:
4439 strcpy (rfm, "rfm = stm");
4440 break;
4441
4442 case FAB$C_STMCR:
4443 strcpy (rfm, "rfm = stmcr");
4444 break;
4445
4446 case FAB$C_STMLF:
4447 strcpy (rfm, "rfm = stmlf");
4448 break;
4449
4450 case FAB$C_UDF:
4451 strcpy (rfm, "rfm = udf");
4452 break;
4453
4454 case FAB$C_VAR:
4455 strcpy (rfm, "rfm = var");
4456 break;
4457 }
4458 strcpy (rat, "rat = ");
4459 if (st_buf.st_fab_rat & FAB$M_CR)
4460 strcat (rat, "cr");
4461 else if (st_buf.st_fab_rat & FAB$M_FTN)
4462 strcat (rat, "ftn");
4463 else if (st_buf.st_fab_rat & FAB$M_PRN)
4464 strcat (rat, "prn");
4465 if (st_buf.st_fab_rat & FAB$M_BLK)
4466 if (st_buf.st_fab_rat & (FAB$M_CR|FAB$M_FTN|FAB$M_PRN))
4467 strcat (rat, ", blk");
4468 else
4469 strcat (rat, "blk");
4470 }
4471 else
4472 {
4473 strcpy (rfm, vms_stmlf_recfm ? "rfm = stmlf" : "rfm=var");
4474 strcpy (rat, "rat=cr");
4475 }
4476 /* Until the VAX C RTL fixes the many bugs with modes, always use
4477 mode 0 to get the user's default protection. */
4478 fd = creat (name, 0, rfm, rat);
4479 if (fd < 0 && errno == EEXIST)
4480 {
4481 if (unlink (name) < 0)
4482 report_file_error ("delete", build_string (name));
4483 fd = creat (name, 0, rfm, rat);
4484 }
4485 return fd;
4486}
4487#endif /* creat */
4488
4489/* fwrite to stdout is S L O W. Speed it up by using fputc...*/
4490int
4491sys_fwrite (ptr, size, num, fp)
4492 register char * ptr;
4493 FILE * fp;
4494{
4495 register int tot = num * size;
4496
4497 while (tot--)
4498 fputc (*ptr++, fp);
4499 return num;
4500}
4501
4502/*
4503 * The VMS C library routine creat actually creates a new version of an
4504 * existing file rather than truncating the old version. There are times
4505 * when this is not the desired behavior, for instance, when writing an
4506 * auto save file (you only want one version), or when you don't have
4507 * write permission in the directory containing the file (but the file
4508 * itself is writable). Hence this routine, which is equivalent to
4509 * "close (creat (fn, 0));" on Unix if fn already exists.
4510 */
4511int
4512vms_truncate (fn)
4513 char *fn;
4514{
4515 struct FAB xfab = cc$rms_fab;
4516 struct RAB xrab = cc$rms_rab;
4517 int status;
4518
4519 xfab.fab$l_fop = FAB$M_TEF; /* free allocated but unused blocks on close */
4520 xfab.fab$b_fac = FAB$M_TRN | FAB$M_GET; /* allow truncate and get access */
4521 xfab.fab$b_shr = FAB$M_NIL; /* allow no sharing - file must be locked */
4522 xfab.fab$l_fna = fn;
4523 xfab.fab$b_fns = strlen (fn);
4524 xfab.fab$l_dna = ";0"; /* default to latest version of the file */
4525 xfab.fab$b_dns = 2;
4526 xrab.rab$l_fab = &xfab;
4527
4528 /* This gibberish opens the file, positions to the first record, and
4529 deletes all records from there until the end of file. */
4530 if ((SYS$OPEN (&xfab) & 01) == 01)
4531 {
4532 if ((SYS$CONNECT (&xrab) & 01) == 01 &&
4533 (SYS$FIND (&xrab) & 01) == 01 &&
4534 (SYS$TRUNCATE (&xrab) & 01) == 01)
4535 status = 0;
4536 else
4537 status = -1;
4538 }
4539 else
4540 status = -1;
4541 SYS$CLOSE (&xfab);
4542 return status;
4543}
4544
4545/* Define this symbol to actually read SYSUAF.DAT. This requires either
4546 SYSPRV or a readable SYSUAF.DAT. */
4547
4548#ifdef READ_SYSUAF
4549/*
4550 * getuaf.c
4551 *
4552 * Routine to read the VMS User Authorization File and return
4553 * a specific user's record.
4554 */
4555
4556static struct UAF retuaf;
4557
4558struct UAF *
4559get_uaf_name (uname)
4560 char * uname;
4561{
4562 register status;
4563 struct FAB uaf_fab;
4564 struct RAB uaf_rab;
4565
4566 uaf_fab = cc$rms_fab;
4567 uaf_rab = cc$rms_rab;
4568 /* initialize fab fields */
4569 uaf_fab.fab$l_fna = "SYS$SYSTEM:SYSUAF.DAT";
4570 uaf_fab.fab$b_fns = 21;
4571 uaf_fab.fab$b_fac = FAB$M_GET;
4572 uaf_fab.fab$b_org = FAB$C_IDX;
4573 uaf_fab.fab$b_shr = FAB$M_GET|FAB$M_PUT|FAB$M_UPD|FAB$M_DEL;
4574 /* initialize rab fields */
4575 uaf_rab.rab$l_fab = &uaf_fab;
4576 /* open the User Authorization File */
4577 status = SYS$OPEN (&uaf_fab);
4578 if (!(status&1))
4579 {
4580 errno = EVMSERR;
4581 vaxc$errno = status;
4582 return 0;
4583 }
4584 status = SYS$CONNECT (&uaf_rab);
4585 if (!(status&1))
4586 {
4587 errno = EVMSERR;
4588 vaxc$errno = status;
4589 return 0;
4590 }
4591 /* read the requested record - index is in uname */
4592 uaf_rab.rab$l_kbf = uname;
4593 uaf_rab.rab$b_ksz = strlen (uname);
4594 uaf_rab.rab$b_rac = RAB$C_KEY;
4595 uaf_rab.rab$l_ubf = (char *)&retuaf;
4596 uaf_rab.rab$w_usz = sizeof retuaf;
4597 status = SYS$GET (&uaf_rab);
4598 if (!(status&1))
4599 {
4600 errno = EVMSERR;
4601 vaxc$errno = status;
4602 return 0;
4603 }
4604 /* close the User Authorization File */
4605 status = SYS$DISCONNECT (&uaf_rab);
4606 if (!(status&1))
4607 {
4608 errno = EVMSERR;
4609 vaxc$errno = status;
4610 return 0;
4611 }
4612 status = SYS$CLOSE (&uaf_fab);
4613 if (!(status&1))
4614 {
4615 errno = EVMSERR;
4616 vaxc$errno = status;
4617 return 0;
4618 }
4619 return &retuaf;
4620}
4621
4622struct UAF *
4623get_uaf_uic (uic)
4624 unsigned long uic;
4625{
4626 register status;
4627 struct FAB uaf_fab;
4628 struct RAB uaf_rab;
4629
4630 uaf_fab = cc$rms_fab;
4631 uaf_rab = cc$rms_rab;
4632 /* initialize fab fields */
4633 uaf_fab.fab$l_fna = "SYS$SYSTEM:SYSUAF.DAT";
4634 uaf_fab.fab$b_fns = 21;
4635 uaf_fab.fab$b_fac = FAB$M_GET;
4636 uaf_fab.fab$b_org = FAB$C_IDX;
4637 uaf_fab.fab$b_shr = FAB$M_GET|FAB$M_PUT|FAB$M_UPD|FAB$M_DEL;
4638 /* initialize rab fields */
4639 uaf_rab.rab$l_fab = &uaf_fab;
4640 /* open the User Authorization File */
4641 status = SYS$OPEN (&uaf_fab);
4642 if (!(status&1))
4643 {
4644 errno = EVMSERR;
4645 vaxc$errno = status;
4646 return 0;
4647 }
4648 status = SYS$CONNECT (&uaf_rab);
4649 if (!(status&1))
4650 {
4651 errno = EVMSERR;
4652 vaxc$errno = status;
4653 return 0;
4654 }
4655 /* read the requested record - index is in uic */
4656 uaf_rab.rab$b_krf = 1; /* 1st alternate key */
4657 uaf_rab.rab$l_kbf = (char *) &uic;
4658 uaf_rab.rab$b_ksz = sizeof uic;
4659 uaf_rab.rab$b_rac = RAB$C_KEY;
4660 uaf_rab.rab$l_ubf = (char *)&retuaf;
4661 uaf_rab.rab$w_usz = sizeof retuaf;
4662 status = SYS$GET (&uaf_rab);
4663 if (!(status&1))
4664 {
4665 errno = EVMSERR;
4666 vaxc$errno = status;
4667 return 0;
4668 }
4669 /* close the User Authorization File */
4670 status = SYS$DISCONNECT (&uaf_rab);
4671 if (!(status&1))
4672 {
4673 errno = EVMSERR;
4674 vaxc$errno = status;
4675 return 0;
4676 }
4677 status = SYS$CLOSE (&uaf_fab);
4678 if (!(status&1))
4679 {
4680 errno = EVMSERR;
4681 vaxc$errno = status;
4682 return 0;
4683 }
4684 return &retuaf;
4685}
4686
4687static struct passwd retpw;
4688
4689struct passwd *
4690cnv_uaf_pw (up)
4691 struct UAF * up;
4692{
4693 char * ptr;
4694
4695 /* copy these out first because if the username is 32 chars, the next
4696 section will overwrite the first byte of the UIC */
4697 retpw.pw_uid = up->uaf$w_mem;
4698 retpw.pw_gid = up->uaf$w_grp;
4699
4700 /* I suppose this is not the best style, to possibly overwrite one
4701 byte beyond the end of the field, but what the heck... */
4702 ptr = &up->uaf$t_username[UAF$S_USERNAME];
4703 while (ptr[-1] == ' ')
4704 ptr--;
4705 *ptr = '\0';
4706 strcpy (retpw.pw_name, up->uaf$t_username);
4707
4708 /* the rest of these are counted ascii strings */
4709 strncpy (retpw.pw_gecos, &up->uaf$t_owner[1], up->uaf$t_owner[0]);
4710 retpw.pw_gecos[up->uaf$t_owner[0]] = '\0';
4711 strncpy (retpw.pw_dir, &up->uaf$t_defdev[1], up->uaf$t_defdev[0]);
4712 retpw.pw_dir[up->uaf$t_defdev[0]] = '\0';
4713 strncat (retpw.pw_dir, &up->uaf$t_defdir[1], up->uaf$t_defdir[0]);
4714 retpw.pw_dir[up->uaf$t_defdev[0] + up->uaf$t_defdir[0]] = '\0';
4715 strncpy (retpw.pw_shell, &up->uaf$t_defcli[1], up->uaf$t_defcli[0]);
4716 retpw.pw_shell[up->uaf$t_defcli[0]] = '\0';
4717
4718 return &retpw;
4719}
4720#else /* not READ_SYSUAF */
4721static struct passwd retpw;
4722#endif /* not READ_SYSUAF */
4723
4724struct passwd *
4725getpwnam (name)
4726 char * name;
4727{
4728#ifdef READ_SYSUAF
4729 struct UAF *up;
4730#else
4731 char * user;
4732 char * dir;
4733 unsigned char * full;
4734#endif /* READ_SYSUAF */
4735 char *ptr = name;
4736
4737 while (*ptr)
4738 {
4739 if ('a' <= *ptr && *ptr <= 'z')
4740 *ptr -= 040;
4741 ptr++;
4742 }
4743#ifdef READ_SYSUAF
4744 if (!(up = get_uaf_name (name)))
4745 return 0;
4746 return cnv_uaf_pw (up);
4747#else
4748 if (strcmp (name, getenv ("USER")) == 0)
4749 {
4750 retpw.pw_uid = getuid ();
4751 retpw.pw_gid = getgid ();
4752 strcpy (retpw.pw_name, name);
4753 if (full = egetenv ("FULLNAME"))
4754 strcpy (retpw.pw_gecos, full);
4755 else
4756 *retpw.pw_gecos = '\0';
4757 strcpy (retpw.pw_dir, egetenv ("HOME"));
4758 *retpw.pw_shell = '\0';
4759 return &retpw;
4760 }
4761 else
4762 return 0;
4763#endif /* not READ_SYSUAF */
4764}
4765
4766struct passwd *
4767getpwuid (uid)
4768 unsigned long uid;
4769{
4770#ifdef READ_SYSUAF
4771 struct UAF * up;
4772
4773 if (!(up = get_uaf_uic (uid)))
4774 return 0;
4775 return cnv_uaf_pw (up);
4776#else
4777 if (uid == sys_getuid ())
4778 return getpwnam (egetenv ("USER"));
4779 else
4780 return 0;
4781#endif /* not READ_SYSUAF */
4782}
4783
4784/* return total address space available to the current process. This is
4785 the sum of the current p0 size, p1 size and free page table entries
4786 available. */
4787int
4788vlimit ()
4789{
4790 int item_code;
4791 unsigned long free_pages;
4792 unsigned long frep0va;
4793 unsigned long frep1va;
4794 register status;
4795
4796 item_code = JPI$_FREPTECNT;
4797 if (((status = LIB$GETJPI (&item_code, 0, 0, &free_pages)) & 1) == 0)
4798 {
4799 errno = EVMSERR;
4800 vaxc$errno = status;
4801 return -1;
4802 }
4803 free_pages *= 512;
4804
4805 item_code = JPI$_FREP0VA;
4806 if (((status = LIB$GETJPI (&item_code, 0, 0, &frep0va)) & 1) == 0)
4807 {
4808 errno = EVMSERR;
4809 vaxc$errno = status;
4810 return -1;
4811 }
4812 item_code = JPI$_FREP1VA;
4813 if (((status = LIB$GETJPI (&item_code, 0, 0, &frep1va)) & 1) == 0)
4814 {
4815 errno = EVMSERR;
4816 vaxc$errno = status;
4817 return -1;
4818 }
4819
4820 return free_pages + frep0va + (0x7fffffff - frep1va);
4821}
4822
4823int
4824define_logical_name (varname, string)
4825 char *varname;
4826 char *string;
4827{
4828 struct dsc$descriptor_s strdsc =
4829 {strlen (string), DSC$K_DTYPE_T, DSC$K_CLASS_S, string};
4830 struct dsc$descriptor_s envdsc =
4831 {strlen (varname), DSC$K_DTYPE_T, DSC$K_CLASS_S, varname};
4832 struct dsc$descriptor_s lnmdsc =
4833 {7, DSC$K_DTYPE_T, DSC$K_CLASS_S, "LNM$JOB"};
4834
4835 return LIB$SET_LOGICAL (&envdsc, &strdsc, &lnmdsc, 0, 0);
4836}
4837
4838int
4839delete_logical_name (varname)
4840 char *varname;
4841{
4842 struct dsc$descriptor_s envdsc =
4843 {strlen (varname), DSC$K_DTYPE_T, DSC$K_CLASS_S, varname};
4844 struct dsc$descriptor_s lnmdsc =
4845 {7, DSC$K_DTYPE_T, DSC$K_CLASS_S, "LNM$JOB"};
4846
4847 return LIB$DELETE_LOGICAL (&envdsc, &lnmdsc);
4848}
4849
4850int
4851ulimit ()
4852{
4853 return 0;
4854}
4855
4856int
4857setpgrp ()
4858{
4859 return 0;
4860}
4861
4862int
4863execvp ()
4864{
4865 error ("execvp system call not implemented");
4866 return -1;
4867}
4868
4869int
4870rename (from, to)
4871 char *from, *to;
4872{
4873 int status;
4874 struct FAB from_fab = cc$rms_fab, to_fab = cc$rms_fab;
4875 struct NAM from_nam = cc$rms_nam, to_nam = cc$rms_nam;
4876 char from_esn[NAM$C_MAXRSS];
4877 char to_esn[NAM$C_MAXRSS];
4878
4879 from_fab.fab$l_fna = from;
4880 from_fab.fab$b_fns = strlen (from);
4881 from_fab.fab$l_nam = &from_nam;
4882 from_fab.fab$l_fop = FAB$M_NAM;
4883
4884 from_nam.nam$l_esa = from_esn;
4885 from_nam.nam$b_ess = sizeof from_esn;
4886
4887 to_fab.fab$l_fna = to;
4888 to_fab.fab$b_fns = strlen (to);
4889 to_fab.fab$l_nam = &to_nam;
4890 to_fab.fab$l_fop = FAB$M_NAM;
4891
4892 to_nam.nam$l_esa = to_esn;
4893 to_nam.nam$b_ess = sizeof to_esn;
4894
4895 status = SYS$RENAME (&from_fab, 0, 0, &to_fab);
4896
4897 if (status & 1)
4898 return 0;
4899 else
4900 {
4901 if (status == RMS$_DEV)
4902 errno = EXDEV;
4903 else
4904 errno = EVMSERR;
4905 vaxc$errno = status;
4906 return -1;
4907 }
4908}
4909
4910/* This function renames a file like `rename', but it strips
4911 the version number from the "to" filename, such that the "to" file is
4912 will always be a new version. It also sets the file protection once it is
4913 finished. The protection that we will use is stored in fab_final_pro,
4914 and was set when we did a creat_copy_attrs to create the file that we
4915 are renaming.
4916
4917 We could use the chmod function, but Eunichs uses 3 bits per user category
4918 to describe the protection, and VMS uses 4 (write and delete are separate
4919 bits). To maintain portability, the VMS implementation of `chmod' wires
4920 the W and D bits together. */
4921
4922
4923static struct fibdef fib; /* We need this initialized to zero */
4924char vms_file_written[NAM$C_MAXRSS];
4925
4926int
4927rename_sans_version (from,to)
4928 char *from, *to;
4929{
4930 short int chan;
4931 int stat;
4932 short int iosb[4];
4933 int status;
4934 struct FAB to_fab = cc$rms_fab;
4935 struct NAM to_nam = cc$rms_nam;
4936 struct dsc$descriptor fib_d ={sizeof (fib),0,0,(char*) &fib};
4937 struct dsc$descriptor fib_attr[2]
4938 = {{sizeof (fab_final_pro),ATR$C_FPRO,0,(char*) &fab_final_pro},{0,0,0,0}};
4939 char to_esn[NAM$C_MAXRSS];
4940
4941 $DESCRIPTOR (disk,to_esn);
4942
4943 to_fab.fab$l_fna = to;
4944 to_fab.fab$b_fns = strlen (to);
4945 to_fab.fab$l_nam = &to_nam;
4946 to_fab.fab$l_fop = FAB$M_NAM;
4947
4948 to_nam.nam$l_esa = to_esn;
4949 to_nam.nam$b_ess = sizeof to_esn;
4950
4951 status = SYS$PARSE (&to_fab, 0, 0); /* figure out the full file name */
4952
4953 if (to_nam.nam$l_fnb && NAM$M_EXP_VER)
4954 *(to_nam.nam$l_ver) = '\0';
4955
4956 stat = rename (from, to_esn);
4957 if (stat < 0)
4958 return stat;
4959
4960 strcpy (vms_file_written, to_esn);
4961
4962 to_fab.fab$l_fna = vms_file_written; /* this points to the versionless name */
4963 to_fab.fab$b_fns = strlen (vms_file_written);
4964
4965 /* Now set the file protection to the correct value */
4966 SYS$OPEN (&to_fab, 0, 0); /* This fills in the nam$w_fid fields */
4967
4968 /* Copy these fields into the fib */
4969 fib.fib$r_fid_overlay.fib$w_fid[0] = to_nam.nam$w_fid[0];
4970 fib.fib$r_fid_overlay.fib$w_fid[1] = to_nam.nam$w_fid[1];
4971 fib.fib$r_fid_overlay.fib$w_fid[2] = to_nam.nam$w_fid[2];
4972
4973 SYS$CLOSE (&to_fab, 0, 0);
4974
4975 stat = SYS$ASSIGN (&disk, &chan, 0, 0); /* open a channel to the disk */
4976 if (!stat)
4977 LIB$SIGNAL (stat);
4978 stat = SYS$QIOW (0, chan, IO$_MODIFY, iosb, 0, 0, &fib_d,
4979 0, 0, 0, &fib_attr, 0);
4980 if (!stat)
4981 LIB$SIGNAL (stat);
4982 stat = SYS$DASSGN (chan);
4983 if (!stat)
4984 LIB$SIGNAL (stat);
4985 strcpy (vms_file_written, to_esn); /* We will write this to the terminal*/
4986 return 0;
4987}
4988
4989int
4990link (file, new)
4991 char * file, * new;
4992{
4993 register status;
4994 struct FAB fab;
4995 struct NAM nam;
4996 unsigned short fid[3];
4997 char esa[NAM$C_MAXRSS];
4998
4999 fab = cc$rms_fab;
5000 fab.fab$l_fop = FAB$M_OFP;
5001 fab.fab$l_fna = file;
5002 fab.fab$b_fns = strlen (file);
5003 fab.fab$l_nam = &nam;
5004
5005 nam = cc$rms_nam;
5006 nam.nam$l_esa = esa;
5007 nam.nam$b_ess = NAM$C_MAXRSS;
5008
5009 status = SYS$PARSE (&fab);
5010 if ((status & 1) == 0)
5011 {
5012 errno = EVMSERR;
5013 vaxc$errno = status;
5014 return -1;
5015 }
5016 status = SYS$SEARCH (&fab);
5017 if ((status & 1) == 0)
5018 {
5019 errno = EVMSERR;
5020 vaxc$errno = status;
5021 return -1;
5022 }
5023
5024 fid[0] = nam.nam$w_fid[0];
5025 fid[1] = nam.nam$w_fid[1];
5026 fid[2] = nam.nam$w_fid[2];
5027
5028 fab.fab$l_fna = new;
5029 fab.fab$b_fns = strlen (new);
5030
5031 status = SYS$PARSE (&fab);
5032 if ((status & 1) == 0)
5033 {
5034 errno = EVMSERR;
5035 vaxc$errno = status;
5036 return -1;
5037 }
5038
5039 nam.nam$w_fid[0] = fid[0];
5040 nam.nam$w_fid[1] = fid[1];
5041 nam.nam$w_fid[2] = fid[2];
5042
5043 nam.nam$l_esa = nam.nam$l_name;
5044 nam.nam$b_esl = nam.nam$b_name + nam.nam$b_type + nam.nam$b_ver;
5045
5046 status = SYS$ENTER (&fab);
5047 if ((status & 1) == 0)
5048 {
5049 errno = EVMSERR;
5050 vaxc$errno = status;
5051 return -1;
5052 }
5053
5054 return 0;
5055}
5056
5057void
5058croak (badfunc)
5059 char *badfunc;
5060{
5061 printf ("%s not yet implemented\r\n", badfunc);
5062 reset_sys_modes ();
5063 exit (1);
5064}
5065
5066long
5067random ()
5068{
5069 /* Arrange to return a range centered on zero. */
5070 return rand () - (1 << 30);
5071}
5072
5073void
5074srandom (seed)
5075{
5076 srand (seed);
5077}
5078#endif /* VMS */
5079\f
5080#ifdef AIXHFT
5081
5082/* Called from init_sys_modes. */
5083void
5084hft_init ()
5085{
5086 int junk;
5087
5088 /* If we're not on an HFT we shouldn't do any of this. We determine
5089 if we are on an HFT by trying to get an HFT error code. If this
5090 call fails, we're not on an HFT. */
5091#ifdef IBMR2AIX
5092 if (ioctl (0, HFQERROR, &junk) < 0)
5093 return;
5094#else /* not IBMR2AIX */
5095 if (ioctl (0, HFQEIO, 0) < 0)
5096 return;
5097#endif /* not IBMR2AIX */
5098
5099 /* On AIX the default hft keyboard mapping uses backspace rather than delete
5100 as the rubout key's ASCII code. Here this is changed. The bug is that
5101 there's no way to determine the old mapping, so in reset_sys_modes
5102 we need to assume that the normal map had been present. Of course, this
5103 code also doesn't help if on a terminal emulator which doesn't understand
5104 HFT VTD's. */
5105 {
5106 struct hfbuf buf;
5107 struct hfkeymap keymap;
5108
5109 buf.hf_bufp = (char *)&keymap;
5110 buf.hf_buflen = sizeof (keymap);
5111 keymap.hf_nkeys = 2;
5112 keymap.hfkey[0].hf_kpos = 15;
5113 keymap.hfkey[0].hf_kstate = HFMAPCHAR | HFSHFNONE;
5114#ifdef IBMR2AIX
5115 keymap.hfkey[0].hf_keyidh = '<';
5116#else /* not IBMR2AIX */
5117 keymap.hfkey[0].hf_page = '<';
5118#endif /* not IBMR2AIX */
5119 keymap.hfkey[0].hf_char = 127;
5120 keymap.hfkey[1].hf_kpos = 15;
5121 keymap.hfkey[1].hf_kstate = HFMAPCHAR | HFSHFSHFT;
5122#ifdef IBMR2AIX
5123 keymap.hfkey[1].hf_keyidh = '<';
5124#else /* not IBMR2AIX */
5125 keymap.hfkey[1].hf_page = '<';
5126#endif /* not IBMR2AIX */
5127 keymap.hfkey[1].hf_char = 127;
5128 hftctl (0, HFSKBD, &buf);
5129 }
5130 /* The HFT system on AIX doesn't optimize for scrolling, so it's really ugly
5131 at times. */
5132 line_ins_del_ok = char_ins_del_ok = 0;
5133}
5134
5135/* Reset the rubout key to backspace. */
5136
5137void
5138hft_reset ()
5139{
5140 struct hfbuf buf;
5141 struct hfkeymap keymap;
5142 int junk;
5143
5144#ifdef IBMR2AIX
5145 if (ioctl (0, HFQERROR, &junk) < 0)
5146 return;
5147#else /* not IBMR2AIX */
5148 if (ioctl (0, HFQEIO, 0) < 0)
5149 return;
5150#endif /* not IBMR2AIX */
5151
5152 buf.hf_bufp = (char *)&keymap;
5153 buf.hf_buflen = sizeof (keymap);
5154 keymap.hf_nkeys = 2;
5155 keymap.hfkey[0].hf_kpos = 15;
5156 keymap.hfkey[0].hf_kstate = HFMAPCHAR | HFSHFNONE;
5157#ifdef IBMR2AIX
5158 keymap.hfkey[0].hf_keyidh = '<';
5159#else /* not IBMR2AIX */
5160 keymap.hfkey[0].hf_page = '<';
5161#endif /* not IBMR2AIX */
5162 keymap.hfkey[0].hf_char = 8;
5163 keymap.hfkey[1].hf_kpos = 15;
5164 keymap.hfkey[1].hf_kstate = HFMAPCHAR | HFSHFSHFT;
5165#ifdef IBMR2AIX
5166 keymap.hfkey[1].hf_keyidh = '<';
5167#else /* not IBMR2AIX */
5168 keymap.hfkey[1].hf_page = '<';
5169#endif /* not IBMR2AIX */
5170 keymap.hfkey[1].hf_char = 8;
5171 hftctl (0, HFSKBD, &buf);
5172}
5173
5174#endif /* AIXHFT */
5175
5176#ifdef USE_DL_STUBS
5177
5178/* These are included on Sunos 4.1 when we do not use shared libraries.
5179 X11 libraries may refer to these functions but (we hope) do not
5180 actually call them. */
5181
5182void *
5183dlopen ()
5184{
5185 return 0;
5186}
5187
5188void *
5189dlsym ()
5190{
5191 return 0;
5192}
5193
5194int
5195dlclose ()
5196{
5197 return -1;
5198}
5199
5200#endif /* USE_DL_STUBS */
5201\f
5202#ifndef BSTRING
5203
5204#ifndef bzero
5205
5206void
5207bzero (b, length)
5208 register char *b;
5209 register int length;
5210{
5211#ifdef VMS
5212 short zero = 0;
5213 long max_str = 65535;
5214
5215 while (length > max_str) {
5216 (void) LIB$MOVC5 (&zero, &zero, &zero, &max_str, b);
5217 length -= max_str;
5218 b += max_str;
5219 }
5220 max_str = length;
5221 (void) LIB$MOVC5 (&zero, &zero, &zero, &max_str, b);
5222#else
5223 while (length-- > 0)
5224 *b++ = 0;
5225#endif /* not VMS */
5226}
5227
5228#endif /* no bzero */
5229#endif /* BSTRING */
5230
5231#if (!defined (BSTRING) && !defined (bcopy)) || defined (NEED_BCOPY)
5232#undef bcopy
5233
5234/* Saying `void' requires a declaration, above, where bcopy is used
5235 and that declaration causes pain for systems where bcopy is a macro. */
5236bcopy (b1, b2, length)
5237 register char *b1;
5238 register char *b2;
5239 register int length;
5240{
5241#ifdef VMS
5242 long max_str = 65535;
5243
5244 while (length > max_str) {
5245 (void) LIB$MOVC3 (&max_str, b1, b2);
5246 length -= max_str;
5247 b1 += max_str;
5248 b2 += max_str;
5249 }
5250 max_str = length;
5251 (void) LIB$MOVC3 (&length, b1, b2);
5252#else
5253 while (length-- > 0)
5254 *b2++ = *b1++;
5255#endif /* not VMS */
5256}
5257#endif /* (!defined (BSTRING) && !defined (bcopy)) || defined (NEED_BCOPY) */
5258
5259#ifndef BSTRING
5260#ifndef bcmp
5261int
5262bcmp (b1, b2, length) /* This could be a macro! */
5263 register char *b1;
5264 register char *b2;
5265 register int length;
5266{
5267#ifdef VMS
5268 struct dsc$descriptor_s src1 = {length, DSC$K_DTYPE_T, DSC$K_CLASS_S, b1};
5269 struct dsc$descriptor_s src2 = {length, DSC$K_DTYPE_T, DSC$K_CLASS_S, b2};
5270
5271 return STR$COMPARE (&src1, &src2);
5272#else
5273 while (length-- > 0)
5274 if (*b1++ != *b2++)
5275 return 1;
5276
5277 return 0;
5278#endif /* not VMS */
5279}
5280#endif /* no bcmp */
5281#endif /* not BSTRING */
5282\f
5283#ifndef HAVE_STRSIGNAL
5284char *
5285strsignal (code)
5286 int code;
5287{
5288 char *signame = 0;
5289
5290 if (0 <= code && code < NSIG)
5291 {
5292#ifdef VMS
5293 signame = sys_errlist[code];
5294#else
5295 /* Cast to suppress warning if the table has const char *. */
5296 signame = (char *) sys_siglist[code];
5297#endif
5298 }
5299
5300 return signame;
5301}
5302#endif /* HAVE_STRSIGNAL */
5303\f
5304/* All the Macintosh stuffs go here */
5305
5306#ifdef macintosh
5307
5308#include <Files.h>
5309#include <MacTypes.h>
5310#include <TextUtils.h>
5311#include <Folders.h>
5312
5313#include <dirent.h>
5314#include <sys/stat.h>
5315#include <string.h>
5316#include <pwd.h>
5317#include <sys/param.h>
5318
5319/* Convert a Mac pathname to Unix form. A Mac full pathname is one
5320 that does not begin with a ':' and contains at least one ':'. A Mac
5321 full pathname causes an '/' to be prepended to the Unix pathname.
5322 The algorithm for the rest of the pathname is as follows:
5323 For each segment between two ':',
5324 if it is non-null, copy as is and then add a '/' at the end,
5325 otherwise, insert a "../" into the Unix pathname.
5326 Returns 1 if successful; 0 if fails. */
5327
5328int
5329Mac2UnixPathname (const char *mfn, char *ufn, int ufnbuflen)
5330{
5331 const char *p, *q, *pe;
5332
5333 strcpy (ufn, "");
5334
5335 if (*mfn == '\0')
5336 return 1;
5337
5338 p = strchr (mfn, ':');
5339 if (p != 0 && p != mfn) /* full pathname */
5340 strcat (ufn, "/");
5341
5342 p = mfn;
5343 if (*p == ':')
5344 p++;
5345
5346 pe = mfn + strlen (mfn);
5347 while (p < pe)
5348 {
5349 q = strchr (p, ':');
5350 if (q)
5351 {
5352 if (q == p)
5353 { /* two consecutive ':' */
5354 if (strlen (ufn) + 3 >= ufnbuflen)
5355 return 0;
5356 strcat (ufn, "../");
5357 }
5358 else
5359 {
5360 if (strlen (ufn) + (q - p) + 1 >= ufnbuflen)
5361 return 0;
5362 strncat (ufn, p, q - p);
5363 strcat (ufn, "/");
5364 }
5365 p = q + 1;
5366 }
5367 else
5368 {
5369 if (strlen (ufn) + (pe - p) >= ufnbuflen)
5370 return 0;
5371 strncat (ufn, p, pe - p); /* no separator for last one */
5372 p = pe;
5373 }
5374 }
5375
5376 return 1;
5377}
5378
5379extern char *GetTempDirName ();
5380
5381/* Convert a Unix pathname to Mac form. Approximately reverse of the
5382 above in algorithm. */
5383int
5384Unix2MacPathname (const char *ufn, char *mfn, int mfnbuflen)
5385{
5386 const char *p, *q, *pe;
5387 char expandedPathname[MAXPATHLEN+1];
5388
5389 strcpy (mfn, "");
5390
5391 if (*ufn == '\0')
5392 return 1;
5393
5394 p = ufn;
5395
5396 /* Check for and handle volume names. Last comparison: strangely
5397 somewhere `/.emacs' is passed. A temporary fix for now. */
5398 if (*p == '/' && strchr (p+1, '/') == NULL && strcmp (p, "/.emacs") != 0)
5399 {
5400 if (strlen (p) + 1 > mfnbuflen)
5401 return 0;
5402 strcpy (mfn, p+1);
5403 strcat (mfn, ":");
5404 return 1;
5405 }
5406
5407 if (strncmp (p, "~emacs/", 7) == 0)
5408 { /* expand to emacs dir found by InitEmacsPasswdDir */
5409 struct passwd *pw = getpwnam ("emacs");
5410 p += 7;
5411 if (strlen (pw->pw_dir) + strlen (p) > MAXPATHLEN)
5412 return 0;
5413 strcpy (expandedPathname, pw->pw_dir);
5414 strcat (expandedPathname, p);
5415 p = expandedPathname;
5416 /* Now p points to the pathname with emacs dir prefix. */
5417 }
5418 else if (strncmp (p, "/tmp/", 5) == 0)
5419 {
5420 char *t = GetTempDirName ();
5421 p += 5;
5422 if (strlen (t) + strlen (p) > MAXPATHLEN)
5423 return 0;
5424 strcpy (expandedPathname, t);
5425 strcat (expandedPathname, p);
5426 p = expandedPathname;
5427 /* Now p points to the pathname with emacs dir prefix. */
5428 }
5429 else if (*p != '/') /* relative pathname */
5430 strcat (mfn, ":");
5431
5432 if (*p == '/')
5433 p++;
5434
5435 pe = p + strlen (p);
5436 while (p < pe)
5437 {
5438 q = strchr (p, '/');
5439 if (q)
5440 {
5441 if (q - p == 2 && *p == '.' && *(p+1) == '.')
5442 {
5443 if (strlen (mfn) + 1 >= mfnbuflen)
5444 return 0;
5445 strcat (mfn, ":");
5446 }
5447 else
5448 {
5449 if (strlen (mfn) + (q - p) + 1 >= mfnbuflen)
5450 return 0;
5451 strncat (mfn, p, q - p);
5452 strcat (mfn, ":");
5453 }
5454 p = q + 1;
5455 }
5456 else
5457 {
5458 if (strlen (mfn) + (pe - p) >= mfnbuflen)
5459 return 0;
5460 strncat (mfn, p, pe - p);
5461 p = pe;
5462 }
5463 }
5464
5465 return 1;
5466}
5467
5468/* The following functions with "sys_" prefix are stubs to Unix
5469 functions that have already been implemented by CW or MPW. The
5470 calls to them in Emacs source course are #define'd to call the sys_
5471 versions by the header files s-mac.h. In these stubs pathnames are
5472 converted between their Unix and Mac forms. */
5473/* Unix Epoch is Jan 1, 1970 while Mac Epoch is Jan 1, 1904: 66 years
5474 + 17 leap days */
5475#define MAC_UNIX_EPOCH_DIFF ((365L * 66 + 17) * 24 * 60 * 60)
5476
5477/* CW Epoch is Jan 1, 1900 (aaarghhhhh!); remember, 1900 is not a leap
5478 year! */
5479#define CW_UNIX_EPOCH_DIFF ((365L * 70 + 17) * 24 * 60 * 60)
5480
5481/* Define our own stat function for both MrC and CW. The reason for
5482 doing this: "stat" is both the name of a struct and function name:
5483 we can't #define stat to something else to
5484 redirect Emacs's calls to our own version that converts Unix style
5485 filenames to Mac style filename because all sorts of compilation
5486 errors will be generated if stat is #define'd to be something else. */
5487
5488int
5489stat (const char *path, struct stat *buf)
5490{
5491 char MacPathname[MAXPATHLEN+1];
5492 CInfoPBRec cipb;
5493
5494 if (Unix2MacPathname (path, MacPathname, MAXPATHLEN+1) == 0)
5495 return -1;
5496
5497 c2pstr (MacPathname);
5498 cipb.hFileInfo.ioNamePtr = MacPathname;
5499 cipb.hFileInfo.ioVRefNum = 0;
5500 cipb.hFileInfo.ioDirID = 0;
5501 cipb.hFileInfo.ioFDirIndex = 0; /* set to 0 to get information about specific dir or file */
5502
5503 errno = PBGetCatInfo (&cipb, false);
5504 if (errno == -43) /* -43: fnfErr defined in Errors.h */
5505 errno = ENOENT;
5506 if (errno != noErr)
5507 return -1;
5508
5509 if (cipb.hFileInfo.ioFlAttrib & 0x10)
5510 { /* bit 4 = 1 for directories */
5511 buf->st_mode = S_IFDIR | S_IREAD | S_IEXEC;
5512 if (!(cipb.hFileInfo.ioFlAttrib & 0x1)) /* bit 1 = 1 for locked files/directories */
5513 buf->st_mode |= S_IWRITE;
5514 buf->st_ino = cipb.dirInfo.ioDrDirID;
5515 buf->st_dev = cipb.dirInfo.ioVRefNum;
5516 buf->st_size = cipb.dirInfo.ioDrNmFls; /* size of dir = number of files and dirs */
5517 buf->st_atime = buf->st_mtime = cipb.dirInfo.ioDrMdDat - MAC_UNIX_EPOCH_DIFF;
5518 buf->st_ctime = cipb.dirInfo.ioDrCrDat - MAC_UNIX_EPOCH_DIFF;
5519 }
5520 else
5521 {
5522 buf->st_mode = S_IFREG | S_IREAD;
5523 if (!(cipb.hFileInfo.ioFlAttrib & 0x1)) /* bit 1 = 1 for locked files/directories */
5524 buf->st_mode |= S_IWRITE;
5525 if (cipb.hFileInfo.ioFlFndrInfo.fdType == 'APPL')
5526 buf->st_mode |= S_IEXEC;
5527 buf->st_ino = cipb.hFileInfo.ioDirID;
5528 buf->st_dev = cipb.hFileInfo.ioVRefNum;
5529 buf->st_size = cipb.hFileInfo.ioFlLgLen;
5530 buf->st_atime = buf->st_mtime = cipb.hFileInfo.ioFlMdDat - MAC_UNIX_EPOCH_DIFF;
5531 buf->st_ctime = cipb.hFileInfo.ioFlCrDat - MAC_UNIX_EPOCH_DIFF;
5532 }
5533 buf->st_nlink = 1;
5534 buf->st_uid = getuid ();
5535 buf->st_gid = getgid ();
5536 buf->st_rdev = 0;
5537
5538 return 0;
5539}
5540
5541#if __MRC__
5542
5543/* CW defines fstat in stat.mac.c while MPW does not provide this
5544 function. Without the information of how to get from a file
5545 descriptor in MPW StdCLib to a Mac OS file spec, it should be hard
5546 to implement this function. Fortunately, there is only one place
5547 where this function is called in our configuration: in fileio.c,
5548 where only the st_dev and st_ino fields are used to determine
5549 whether two fildes point to different i-nodes to prevent copying
5550 a file onto itself equal. What we have here probably needs
5551 improvement. */
5552int
5553fstat (int fildes, struct stat *buf)
5554{
5555 buf->st_dev = 0;
5556 buf->st_ino = fildes;
5557 return 0; /* success */
5558}
5559
5560#endif /* __MRC__ */
5561
5562/* From Think Reference code example */
5563int
5564mkdir (const char *dirname, int mode)
5565{
5566#pragma unused (mode)
5567
5568 HFileParam hfpb;
5569 char MacPathname[MAXPATHLEN+1];
5570
5571 if (Unix2MacPathname (dirname, MacPathname, MAXPATHLEN+1) == 0)
5572 return -1;
5573
5574 c2pstr (MacPathname);
5575 hfpb.ioNamePtr = MacPathname;
5576 hfpb.ioVRefNum = 0; /*ignored unless name is invalid */
5577 hfpb.ioDirID = 0; /*parent is the root */
5578
5579 /* Just return the Mac OSErr code for now. */
5580 errno = PBDirCreate ((HParmBlkPtr) &hfpb, false);
5581 return errno == noErr ? 0 : -1;
5582}
5583
5584int
5585rmdir (const char *dirname)
5586{
5587 HFileParam hfpb;
5588 char MacPathname[MAXPATHLEN+1];
5589
5590 if (Unix2MacPathname (dirname, MacPathname, MAXPATHLEN+1) == 0)
5591 return -1;
5592
5593 c2pstr (MacPathname);
5594 hfpb.ioNamePtr = MacPathname;
5595 hfpb.ioVRefNum = 0; /*ignored unless name is invalid */
5596 hfpb.ioDirID = 0; /*parent is the root */
5597
5598 errno = PBHDelete ((HParmBlkPtr) &hfpb, false);
5599 return errno == noErr ? 0 : -1;
5600}
5601
5602#ifdef __MRC__
5603
5604/* No implementation yet. */
5605int
5606execvp (const char *path, ...)
5607{
5608 return -1;
5609}
5610
5611#endif /* __MRC__ */
5612
5613int
5614utime (const char *path, const struct utimbuf *times)
5615{
5616 char MacPathname[MAXPATHLEN+1];
5617 CInfoPBRec cipb;
5618
5619 if (Unix2MacPathname (path, MacPathname, MAXPATHLEN+1) == 0)
5620 return -1;
5621
5622 c2pstr (MacPathname);
5623 cipb.hFileInfo.ioNamePtr = MacPathname;
5624 cipb.hFileInfo.ioVRefNum = 0;
5625 cipb.hFileInfo.ioDirID = 0;
5626 /* Set to 0 to get information about specific dir or file. */
5627 cipb.hFileInfo.ioFDirIndex = 0;
5628
5629 errno = PBGetCatInfo (&cipb, false);
5630 if (errno != noErr)
5631 return -1;
5632
5633 if (cipb.hFileInfo.ioFlAttrib & 0x10)
5634 { /* bit 4 = 1 for directories */
5635 if (times)
5636 cipb.dirInfo.ioDrMdDat = times->modtime + MAC_UNIX_EPOCH_DIFF;
5637 else
5638 GetDateTime (&cipb.dirInfo.ioDrMdDat);
5639 }
5640 else
5641 {
5642 if (times)
5643 cipb.hFileInfo.ioFlMdDat = times->modtime + MAC_UNIX_EPOCH_DIFF;
5644 else
5645 GetDateTime (&cipb.hFileInfo.ioFlMdDat);
5646 }
5647
5648 errno = PBSetCatInfo (&cipb, false);
5649 return errno == noErr ? 0 : -1;
5650}
5651
5652#define F_OK 0
5653#define X_OK 1
5654#define W_OK 2
5655
5656/* Like stat, but test for access mode in hfpb.ioFlAttrib. */
5657int
5658access (const char *path, int mode)
5659{
5660 char MacPathname[MAXPATHLEN+1];
5661 CInfoPBRec cipb;
5662
5663 if (Unix2MacPathname (path, MacPathname, MAXPATHLEN+1) == 0)
5664 return -1;
5665
5666 c2pstr (MacPathname);
5667 cipb.hFileInfo.ioNamePtr = MacPathname;
5668 cipb.hFileInfo.ioVRefNum = 0;
5669 cipb.hFileInfo.ioDirID = 0;
5670 cipb.hFileInfo.ioFDirIndex = 0; /* set to 0 to get information about specific dir or file */
5671
5672 errno = PBGetCatInfo (&cipb, false);
5673 if (errno != noErr)
5674 return -1;
5675
5676 if (mode == F_OK) /* got this far, file exists */
5677 return 0;
5678
5679 if (mode & X_OK)
5680 if (cipb.hFileInfo.ioFlAttrib & 0x10) /* path refers to a directory */
5681 return 0;
5682 else
5683 {
5684 if (cipb.hFileInfo.ioFlFndrInfo.fdType == 'APPL')
5685 return 0;
5686 else
5687 return -1;
5688 }
5689
5690 if (mode & W_OK)
5691 return (cipb.hFileInfo.ioFlAttrib & 0x1) ? -1 : 0; /* don't allow if lock bit on */
5692
5693 return -1;
5694}
5695
5696#define DEV_NULL_FD 0x10000
5697
5698#undef open
5699int
5700sys_open (const char *path, int oflag)
5701{
5702 char MacPathname[MAXPATHLEN+1];
5703
5704 if (strcmp (path, "/dev/null") == 0)
5705 return DEV_NULL_FD; /* some bogus fd to be ignored in write */
5706
5707 if (Unix2MacPathname (path, MacPathname, MAXPATHLEN+1) == 0)
5708 return -1;
5709 else
5710 return open (MacPathname, oflag);
5711}
5712
5713#undef creat
5714int
5715sys_creat (const char *path, mode_t mode)
5716{
5717 char MacPathname[MAXPATHLEN+1];
5718
5719 if (Unix2MacPathname (path, MacPathname, MAXPATHLEN+1) == 0)
5720 return -1;
5721 else
5722 return creat (MacPathname, mode);
5723}
5724
5725#undef unlink
5726int
5727sys_unlink (const char *path)
5728{
5729 char MacPathname[MAXPATHLEN+1];
5730
5731 if (Unix2MacPathname (path, MacPathname, MAXPATHLEN+1) == 0)
5732 return -1;
5733 else
5734 return unlink (MacPathname);
5735}
5736
5737#undef read
5738int
5739sys_read (int fildes, char *buf, int count)
5740{
5741 if (fildes == 0)
5742 { /* if stdin, call (non-echoing) "getch" in console.h */
5743 if (MacKeyPending ())
5744 { /* don't wait for a key if none has been pressed */
5745 *buf = MacGetChar ();
5746 return 1;
5747 }
5748 else
5749 return 0;
5750 }
5751 else
5752 return read (fildes, buf, count);
5753}
5754
5755#undef write
5756int
5757sys_write (int fildes, char *buf, int count)
5758{
5759 if (fildes == DEV_NULL_FD)
5760 return count;
5761 else
5762 return write (fildes, buf, count);
5763}
5764
5765#undef rename
5766int
5767sys_rename (const char * old_name, const char * new_name)
5768{
5769 char MacOldName[MAXPATHLEN+1], MacNewName[MAXPATHLEN+1];
5770
5771 if (strcmp (old_name, new_name) == 0)
5772 return 0;
5773
5774 if (Unix2MacPathname (old_name, MacOldName, MAXPATHLEN+1) == 0)
5775 return 1;
5776
5777 if (Unix2MacPathname (new_name, MacNewName, MAXPATHLEN+1) == 0)
5778 return 1;
5779
5780 return rename (MacOldName, MacNewName);
5781}
5782
5783#undef fopen
5784extern FILE *fopen (const char *name, const char *mode);
5785FILE
5786sys_fopen (const char *name, const char *mode)
5787{
5788 char MacPathname[MAXPATHLEN+1];
5789
5790 if (Unix2MacPathname (name, MacPathname, MAXPATHLEN+1) == 0)
5791 return 0;
5792 else
5793 return fopen (MacPathname, mode);
5794}
5795
5796#include <Events.h>
5797
5798long targetTicks = 0;
5799
5800#ifdef __MRC__
5801__sigfun alarm_signal_func = (__sigfun) 0;
5802#elif __MWERKS__
5803__signal_func_ptr alarm_signal_func = (__signal_func_ptr) 0;
5804#else
5805You lose!!!
5806#endif
5807
5808/* These functions simulate SIG_ALRM. The stub for function signal
5809 stores the signal handler function in alarm_signal_func if a
5810 SIG_ALRM is encountered. CheckAlarm is called in mac_read_socket,
5811 which emacs calls periodically. A pending alarm is represented by
5812 a non-zero targetTicks value. CheckAlarm calls the handler
5813 function pointed to by alarm_signal_func if one has been set up and
5814 an alarm is pending. */
5815void
5816CheckAlarm ()
5817{
5818 if (targetTicks && TickCount () > targetTicks)
5819 {
5820 targetTicks = 0;
5821 if (alarm_signal_func)
5822 (*alarm_signal_func)(SIGALRM);
5823 }
5824}
5825
5826/* Called in sys_select to wait for an alarm signal to arrive. */
5827int
5828pause ()
5829{
5830 unsigned long finalTick;
5831
5832 if (!targetTicks) /* no alarm pending */
5833 return -1;
5834
5835 while (TickCount () <= targetTicks)
5836 Delay (1UL, &finalTick); /* wait for 1/60 second before trying again */
5837
5838 targetTicks = 0;
5839 if (alarm_signal_func)
5840 (*alarm_signal_func)(SIGALRM);
5841
5842 return 0;
5843}
5844
5845int
5846alarm (int seconds)
5847{
5848 long remaining = targetTicks ? (TickCount () - targetTicks) / 60 : 0;
5849
5850 targetTicks = seconds ? TickCount () + 60 * seconds : 0;
5851
5852 return (remaining < 0) ? 0 : (unsigned int) remaining;
5853}
5854
5855#undef signal
5856#ifdef __MRC__
5857extern __sigfun signal (int signal, __sigfun signal_func);
5858__sigfun
5859sys_signal (int signal_num, __sigfun signal_func)
5860#elif __MWERKS__
5861extern __signal_func_ptr signal (int signal, __signal_func_ptr signal_func);
5862__signal_func_ptr
5863sys_signal (int signal_num, __signal_func_ptr signal_func)
5864#else
5865 You lose!!!
5866#endif
5867{
5868 if (signal_num != SIGALRM)
5869 return signal (signal_num, signal_func);
5870 else
5871 {
5872#ifdef __MRC__
5873 __sigfun old_signal_func;
5874#elif __MWERKS__
5875 __signal_func_ptr old_signal_func;
5876#else
5877 You lose!!!
5878#endif
5879 old_signal_func = alarm_signal_func;
5880 alarm_signal_func = signal_func;
5881 return old_signal_func;
5882 }
5883}
5884
5885/* The time functions adjust time values according to the difference
5886 between the Unix and CW epoches. */
5887
5888#undef gmtime
5889extern struct tm *gmtime (const time_t *);
5890struct tm
5891sys_gmtime (const time_t *timer)
5892{
5893 time_t unixTime = *timer + CW_UNIX_EPOCH_DIFF;
5894
5895 return gmtime (&unixTime);
5896}
5897
5898#undef localtime
5899extern struct tm *localtime (const time_t *);
5900struct tm *
5901sys_localtime (const time_t *timer)
5902{
5903 time_t unixTime = *timer + CW_UNIX_EPOCH_DIFF;
5904
5905 return localtime (&unixTime);
5906}
5907
5908#undef ctime
5909extern char *ctime (const time_t *);
5910char *
5911sys_ctime (const time_t *timer)
5912{
5913 time_t unixTime = *timer + CW_UNIX_EPOCH_DIFF;
5914
5915 return ctime (&unixTime);
5916}
5917
5918#undef time
5919extern time_t time (time_t *);
5920time_t
5921sys_time (time_t *timer)
5922{
5923 time_t macTime = time (NULL) - CW_UNIX_EPOCH_DIFF;
5924
5925 if (timer)
5926 *timer = macTime;
5927
5928 return macTime;
5929}
5930
5931/* no subprocesses, empty wait */
5932int
5933wait (int pid)
5934{
5935 return 0;
5936}
5937
5938void
5939croak (char *badfunc)
5940{
5941 printf ("%s not yet implemented\r\n", badfunc);
5942 exit (1);
5943}
5944
5945char *
5946index (const char * str, int chr)
5947{
5948 return strchr (str, chr);
5949}
5950
5951char *e[] = { 0 };
5952char **environ = &e[0];
5953
5954char *
5955mktemp (char *template)
5956{
5957 int len, k;
5958 static seqnum = 0;
5959
5960 len = strlen (template);
5961 k = len - 1;
5962 while (k >= 0 && template[k] == 'X')
5963 k--;
5964
5965 k++; /* make k index of first 'X' */
5966
5967 if (k < len)
5968 {
5969 /* Zero filled, number of digits equal to the number of X's. */
5970 sprintf (&template[k], "%0*d", len-k, seqnum++);
5971
5972 return template;
5973 }
5974 else
5975 return 0;
5976}
5977
5978/* Emulate getpwuid, getpwnam and others. */
5979
5980#define PASSWD_FIELD_SIZE 256
5981
5982static char myPasswdName[PASSWD_FIELD_SIZE];
5983static char myPasswdDir[MAXPATHLEN+1];
5984
5985static struct passwd myPasswd =
5986{
5987 myPasswdName,
5988 myPasswdDir,
5989};
5990
5991/* Initialized by main () in macterm.c to pathname of emacs directory. */
5992char emacsPasswdDir[MAXPATHLEN+1];
5993
5994void
5995InitEmacsPasswdDir ()
5996{
5997 int found = false;
5998
5999 if (getwd (emacsPasswdDir) && getwd (myPasswdDir))
6000 {
6001 /* Need pathname of first ancestor that begins with `emacs' since
6002 Mac emacs application is somewhere in the emacs-20.3 tree. */
6003 int len = strlen (emacsPasswdDir);
6004 /* J points to the "/" following the directory name being compared. */
6005 int j = len - 1;
6006 int i = j - 1;
6007 while (i >= 0 && !found)
6008 {
6009 while (i >= 0 && emacsPasswdDir[i] != '/')
6010 i--;
6011 if (emacsPasswdDir[i] == '/' && i+5 < len)
6012 found = (strncmp (&(emacsPasswdDir[i+1]), "emacs", 5) == 0);
6013 if (found)
6014 emacsPasswdDir[j+1] = '\0';
6015 else
6016 {
6017 j = i;
6018 i = j - 1;
6019 }
6020 }
6021 }
6022
6023 if (!found)
6024 { /* setting to "/" probably won't work,
6025 but set it to something anyway. */
6026 strcpy (emacsPasswdDir, "/");
6027 strcpy (myPasswdDir, "/");
6028 }
6029}
6030
6031static struct passwd emacsPasswd =
6032{
6033 "emacs",
6034 emacsPasswdDir,
6035};
6036
6037static int myPasswdInited = 0;
6038
6039static void
6040InitMyPasswd ()
6041{
6042 char **ownerName;
6043
6044 /* Note: myPasswdDir initialized in InitEmacsPasswdDir to directory
6045 where Emacs was started. */
6046
6047 ownerName = (char **) GetResource ('STR ',-16096);
6048 if (ownerName)
6049 {
6050 HLock (ownerName);
6051 BlockMove ((unsigned char *) *ownerName,
6052 (unsigned char *) myPasswdName, *ownerName[0] + 1);
6053 HUnlock (ownerName);
6054 p2cstr ((unsigned char *) myPasswdName);
6055 }
6056 else
6057 myPasswdName[0] = 0;
6058}
6059
6060struct passwd *
6061getpwuid (uid_t uid)
6062{
6063 if (!myPasswdInited)
6064 {
6065 InitMyPasswd ();
6066 myPasswdInited = 1;
6067 }
6068
6069 return &myPasswd;
6070}
6071
6072struct passwd *
6073getpwnam (const char *name)
6074{
6075 if (strcmp (name, "emacs") == 0)
6076 return &emacsPasswd;
6077
6078 if (!myPasswdInited)
6079 {
6080 InitMyPasswd ();
6081 myPasswdInited = 1;
6082 }
6083
6084 return &myPasswd;
6085}
6086
6087/* The functions fork, kill, sigsetmask, sigblock, request_sigio,
6088 setpgrp, setpriority, and unrequest_sigio are defined to be empty
6089 as in msdos.c. */
6090
6091int
6092fork ()
6093{
6094 return -1;
6095}
6096
6097int
6098kill (int x, int y)
6099{
6100 return -1;
6101}
6102
6103int
6104sigsetmask (int x)
6105{
6106 return 0;
6107}
6108
6109int
6110sigblock (int mask)
6111{
6112 return 0;
6113}
6114
6115void
6116request_sigio (void)
6117{
6118}
6119
6120int
6121setpgrp ()
6122{
6123 return 0;
6124}
6125
6126void
6127unrequest_sigio (void)
6128{
6129}
6130
6131/* djgpp does not implement pipe either. */
6132int
6133pipe (int _fildes[2])
6134{
6135 errno = EACCES;
6136 return -1;
6137}
6138
6139/* Hard and symbolic links. */
6140int
6141symlink (const char *name1, const char *name2)
6142{
6143 errno = ENOENT;
6144 return -1;
6145}
6146
6147int
6148link (const char *name1, const char *name2)
6149{
6150 errno = ENOENT;
6151 return -1;
6152}
6153
6154int
6155lstat (const char *path, struct stat *sb)
6156{
6157 return stat (path, sb);
6158}
6159
6160int
6161readlink (const char *path, char *buf, int bufsiz)
6162{
6163 errno = ENOENT;
6164 return -1;
6165}
6166
6167mode_t
6168umask (mode_t numask)
6169{
6170 static mode_t mask = 022;
6171 mode_t oldmask = mask;
6172 mask = numask;
6173 return oldmask;
6174}
6175
6176int
6177chmod (const char *path, mode_t mode)
6178{
6179 /* say it always succeed for now */
6180 return 0;
6181}
6182
6183int
6184dup (int oldd)
6185{
6186#ifdef __MRC__
6187 return fcntl (oldd, F_DUPFD, 0);
6188#elif __MWERKS__
6189 /* current implementation of fcntl in fcntl.mac.c simply returns old
6190 descriptor */
6191 return fcntl (oldd, F_DUPFD);
6192#else
6193You lose!!!
6194#endif
6195}
6196
6197/* This is from the original sysdep.c. Emulate BSD dup2. First close
6198 newd if it already exists. Then, attempt to dup oldd. If not
6199 successful, call dup2 recursively until we are, then close the
6200 unsuccessful ones. */
6201int
6202dup2 (int oldd, int newd)
6203{
6204 int fd, ret;
6205
6206 close (newd);
6207
6208 fd = dup (oldd);
6209 if (fd == -1)
6210 return -1;
6211 if (fd == newd)
6212 return newd;
6213 ret = dup2 (oldd, newd);
6214 close (fd);
6215 return ret;
6216}
6217
6218/* let it fail for now */
6219char *
6220sbrk (int incr)
6221{
6222 return (char *) -1;
6223}
6224
6225int
6226fsync (int fd)
6227{
6228 return 0;
6229}
6230
6231int
6232ioctl (int d, int request, void *argp)
6233{
6234 return -1;
6235}
6236
6237#ifdef __MRC__
6238int
6239isatty (int fildes)
6240{
6241 if (fildes >=0 && fildes <= 2)
6242 return 1;
6243 else
6244 return 0;
6245}
6246
6247int
6248getgid ()
6249{
6250 return 100;
6251}
6252
6253int
6254getegid ()
6255{
6256 return 100;
6257}
6258
6259int
6260getuid ()
6261{
6262 return 200;
6263}
6264
6265int
6266geteuid ()
6267{
6268 return 200;
6269}
6270
6271unsigned int
6272sleep (unsigned int seconds)
6273{
6274 unsigned long finalTick;
6275
6276 Delay (seconds * 60UL, &finalTick);
6277 return (0);
6278}
6279#endif /* __MRC__ */
6280
6281#ifdef __MWERKS__
6282#undef getpid
6283int
6284getpid ()
6285{
6286 return 9999;
6287}
6288#endif /* __MWERKS__ */
6289
6290/* Return the path to the directory in which Emacs can create
6291 temporary files. The MacOS "temporary items" directory cannot be
6292 used because it removes the file written by a process when it
6293 exits. In that sense it's more like "/dev/null" than "/tmp" (but
6294 again not exactly). And of course Emacs needs to read back the
6295 files written by its subprocesses. So here we write the files to a
6296 directory "Emacs" in the Preferences Folder. This directory is
6297 created if it does not exist. */
6298static char *
6299GetTempDirName ()
6300{
6301 static char *TempDirName = NULL;
6302 short vRefNum;
6303 long dirID;
6304 OSErr err;
6305 Str255 dirName, fullPath;
6306 CInfoPBRec cpb;
6307 char unixDirName[MAXPATHLEN+1];
6308 DIR *dir;
6309
6310 /* Cache directory name with pointer TempDirName.
6311 Look for it only the first time. */
6312 if (!TempDirName)
6313 {
6314 err = FindFolder (kOnSystemDisk, kPreferencesFolderType,
6315 kCreateFolder, &vRefNum, &dirID);
6316 if (err != noErr)
6317 return NULL;
6318
6319 *fullPath = '\0';
6320 cpb.dirInfo.ioNamePtr = dirName;
6321 cpb.dirInfo.ioDrParID = dirID;
6322
6323 /* Standard ref num to full path name loop */
6324 do {
6325 cpb.dirInfo.ioVRefNum = vRefNum;
6326 cpb.dirInfo.ioFDirIndex = -1;
6327 cpb.dirInfo.ioDrDirID = cpb.dirInfo.ioDrParID;
6328
6329 err = PBGetCatInfo (&cpb, false);
6330
6331 p2cstr (dirName);
6332 strcat (dirName, ":");
6333 if (strlen (fullPath) + strlen (dirName) <= MAXPATHLEN)
6334 {
6335 strcat (dirName, fullPath);
6336 strcpy (fullPath, dirName);
6337 }
6338 else
6339 return NULL;
6340 }
6341 while (cpb.dirInfo.ioDrDirID != fsRtDirID && err == noErr);
6342
6343 if (strlen (fullPath) + 6 <= MAXPATHLEN)
6344 strcat (fullPath, "Emacs:");
6345 else
6346 return NULL;
6347
6348 if (Mac2UnixPathname (fullPath, unixDirName, MAXPATHLEN+1) == 0)
6349 return NULL;
6350
6351 dir = opendir (unixDirName); /* check whether temp directory exists */
6352 if (dir)
6353 closedir (dir);
6354 else if (mkdir (unixDirName, 0700) != 0) /* create it if not */
6355 return NULL;
6356
6357 TempDirName = (char *) malloc (strlen (unixDirName) + 1);
6358 strcpy (TempDirName, unixDirName);
6359 }
6360
6361 return TempDirName;
6362}
6363
6364char *
6365getenv (const char * name)
6366{
6367 if (strcmp (name, "TERM") == 0)
6368 return "vt100";
6369 else if (strcmp (name, "TERMCAP") == 0)
6370 /* for debugging purpose when code was still outputting to dumb terminal */
6371 return "d0|vt100|vt100-am|vt100am|dec vt100:do=[do]:co#100:li#32:cl=[cl]:sf=[sf]:km:\
6372:le=[le]:bs:am:cm=[cm-%d,%d]:nd=[nd]:up=[up]:ce=[ce]:cd=[cd]:so=[so]:se=[se]:\
6373:us=[us]:ue=[ue]:md=[md]:mr=[mr]:mb=[mb]:me=[me]:is=[is]:\
6374:rf=/usr/share/lib/tabset/vt100:rs=[rs]:ks=[ks]:ke=[ke]:\
6375:ku=\\036:kd=\\037:kr=\\035:kl=\\034:kb=[kb]:ho=[ho]:k1=[k1]:k2=[k2]:k3=[k3]:k4=[k4]:\
6376:pt:sr=[sr]:vt#3:xn:sc=[sc]:rc=[rc]:cs=[cs-%d,%d]";
6377 else if (strcmp (name, "TMPDIR") == 0)
6378 return GetTempDirName ();
6379 else
6380 return (NULL);
6381}
6382
6383#ifdef __MRC__
6384#include <utsname.h>
6385
6386int
6387uname (struct utsname *name)
6388{
6389 char **systemName;
6390 systemName = GetString (-16413); /* IM - Resource Manager Reference */
6391 if (systemName)
6392 {
6393 BlockMove (*systemName, name->nodename, (*systemName)[0]+1);
6394 p2cstr (name->nodename);
6395 }
6396 else
6397 return -1;
6398}
6399#endif
6400
6401#include <Processes.h>
6402#include <EPPC.h>
6403
6404/* Event class of HLE sent to subprocess. */
6405const OSType kEmacsSubprocessSend = 'ESND';
6406/* Event class of HLE sent back from subprocess. */
6407const OSType kEmacsSubprocessReply = 'ERPY';
6408
6409char *
6410mystrchr (char *s, char c)
6411{
6412 while (*s && *s != c)
6413 {
6414 if (*s == '\\')
6415 s++;
6416 s++;
6417 }
6418
6419 if (*s)
6420 {
6421 *s = '\0';
6422 return s;
6423 }
6424 else
6425 return NULL;
6426}
6427
6428char *
6429mystrtok (char *s)
6430{
6431 while (*s)
6432 s++;
6433
6434 return s + 1;
6435}
6436
6437void
6438mystrcpy (char *to, char *from)
6439{
6440 while (*from)
6441 {
6442 if (*from == '\\')
6443 from++;
6444 *to++ = *from++;
6445 }
6446 *to = '\0';
6447}
6448
6449/* Start a Mac subprocess. Arguments for it is passed in argv (null
6450 terminated). The process should run with the default directory
6451 "workdir", read input from "infn", and write output and error to
6452 "outfn" and "errfn", resp. The Process Manager call
6453 LaunchApplication is used to start the subprocess. We use high
6454 level events as the mechanism to pass arguments to the subprocess
6455 and to make Emacs wait for the subprocess to terminate and pass
6456 back a result code. The bulk of the code here packs the arguments
6457 into one message to be passed together with the high level event.
6458 Emacs also sometimes starts a subprocess using a shell to perform
6459 wildcard filename expansion. Since we don't really have a shell on
6460 the Mac, this case is detected and the starting of the shell is
6461 by-passed. We really need to add code here to do filename
6462 expansion to support such functionality. */
6463int
6464run_mac_command (argv, workdir, infn, outfn, errfn)
6465 unsigned char **argv;
6466 const char *workdir;
6467 const char *infn, *outfn, errfn;
6468{
6469 char macappname[MAXPATHLEN+1], macworkdir[MAXPATHLEN+1];
6470 char macinfn[MAXPATHLEN+1], macoutfn[MAXPATHLEN+1], macerrfn[MAXPATHLEN+1];
6471 int paramlen, argc, newargc, j, retries;
6472 char **newargv, *param, *p;
6473 OSErr iErr;
6474 FSSpec spec;
6475 LaunchParamBlockRec lpbr;
6476 EventRecord sendEvent, replyEvent;
6477 RgnHandle cursorRegionHdl;
6478 TargetID targ;
6479 unsigned long refCon, len;
6480
6481 if (Unix2MacPathname (workdir, macworkdir, MAXPATHLEN+1) == 0)
6482 return -1;
6483 if (Unix2MacPathname (infn, macinfn, MAXPATHLEN+1) == 0)
6484 return -1;
6485 if (Unix2MacPathname (outfn, macoutfn, MAXPATHLEN+1) == 0)
6486 return -1;
6487 if (Unix2MacPathname (errfn, macerrfn, MAXPATHLEN+1) == 0)
6488 return -1;
6489
6490 paramlen = strlen (macworkdir) + strlen (macinfn) + strlen (macoutfn) + strlen (macerrfn) + 4;
6491 /* count nulls at end of strings */
6492
6493 argc = 0;
6494 while (argv[argc])
6495 argc++;
6496
6497 if (argc == 0)
6498 return -1;
6499
6500 /* If a subprocess is invoked with a shell, we receive 3 arguments of the form:
6501 "<path to emacs bins>/sh" "-c" "<path to emacs bins>/<command> <command args>" */
6502 j = strlen (argv[0]);
6503 if (j >= 3 && strcmp (argv[0]+j-3, "/sh") == 0 && argc == 3 && strcmp (argv[1], "-c") == 0)
6504 {
6505 char *command, *t, tempmacpathname[MAXPATHLEN+1];
6506
6507 /* The arguments for the command in argv[2] are separated by spaces. Count them and put
6508 the count in newargc. */
6509 command = (char *) alloca (strlen (argv[2])+2);
6510 strcpy (command, argv[2]);
6511 if (command[strlen (command) - 1] != ' ')
6512 strcat (command, " ");
6513
6514 t = command;
6515 newargc = 0;
6516 t = mystrchr (t, ' ');
6517 while (t)
6518 {
6519 newargc++;
6520 t = mystrchr (t+1, ' ');
6521 }
6522
6523 newargv = (char **) alloca (sizeof (char *) * newargc);
6524
6525 t = command;
6526 for (j = 0; j < newargc; j++)
6527 {
6528 newargv[j] = (char *) alloca (strlen (t) + 1);
6529 mystrcpy (newargv[j], t);
6530
6531 t = mystrtok (t);
6532 paramlen += strlen (newargv[j]) + 1;
6533 }
6534
6535 if (strncmp (newargv[0], "~emacs/", 7) == 0)
6536 {
6537 if (Unix2MacPathname (newargv[0], tempmacpathname, MAXPATHLEN+1) == 0)
6538 return -1;
6539 }
6540 else
6541 { /* sometimes Emacs call "sh" without a path for the command */
6542#if 0
6543 char *t = (char *) alloca (strlen (newargv[0]) + 7 + 1);
6544 strcpy (t, "~emacs/");
6545 strcat (t, newargv[0]);
6546#endif
6547 Lisp_Object path;
6548 openp (Vexec_path, build_string (newargv[0]), EXEC_SUFFIXES, &path, 1);
6549
6550 if (NILP (path))
6551 return -1;
6552 if (Unix2MacPathname (XSTRING (path)->data, tempmacpathname, MAXPATHLEN+1) == 0)
6553 return -1;
6554 }
6555 strcpy (macappname, tempmacpathname);
6556 }
6557 else
6558 {
6559 if (Unix2MacPathname (argv[0], macappname, MAXPATHLEN+1) == 0)
6560 return -1;
6561
6562 newargv = (char **) alloca (sizeof (char *) * argc);
6563 newargc = argc;
6564 for (j = 1; j < argc; j++)
6565 {
6566 if (strncmp (argv[j], "~emacs/", 7) == 0)
6567 {
6568 char *t = strchr (argv[j], ' ');
6569 if (t)
6570 {
6571 char tempcmdname[MAXPATHLEN+1], tempmaccmdname[MAXPATHLEN+1];
6572 strncpy (tempcmdname, argv[j], t-argv[j]);
6573 tempcmdname[t-argv[j]] = '\0';
6574 if (Unix2MacPathname (tempcmdname, tempmaccmdname, MAXPATHLEN+1) == 0)
6575 return -1;
6576 newargv[j] = (char *) alloca (strlen (tempmaccmdname) + strlen (t) + 1);
6577 strcpy (newargv[j], tempmaccmdname);
6578 strcat (newargv[j], t);
6579 }
6580 else
6581 {
6582 char tempmaccmdname[MAXPATHLEN+1];
6583 if (Unix2MacPathname (argv[j], tempmaccmdname, MAXPATHLEN+1) == 0)
6584 return -1;
6585 newargv[j] = (char *) alloca (strlen (tempmaccmdname)+1);
6586 strcpy (newargv[j], tempmaccmdname);
6587 }
6588 }
6589 else
6590 newargv[j] = argv[j];
6591 paramlen += strlen (newargv[j]) + 1;
6592 }
6593 }
6594
6595 /* After expanding all the arguments, we now know the length of the parameter block to be
6596 sent to the subprocess as a message attached to the HLE. */
6597 param = (char *) malloc (paramlen + 1);
6598 if (!param)
6599 return -1;
6600
6601 p = param;
6602 *p++ = newargc; /* first byte of message contains number of arguments for command */
6603 strcpy (p, macworkdir);
6604 p += strlen (macworkdir);
6605 *p++ = '\0'; /* null terminate strings sent so it's possible to use strcpy over there */
6606 strcpy (p, macinfn);
6607 p += strlen (macinfn);
6608 *p++ = '\0';
6609 strcpy (p, macoutfn);
6610 p += strlen (macoutfn);
6611 *p++ = '\0';
6612 strcpy (p, macerrfn);
6613 p += strlen (macerrfn);
6614 *p++ = '\0';
6615 for (j = 1; j < newargc; j++) {
6616 strcpy (p, newargv[j]);
6617 p += strlen (newargv[j]);
6618 *p++ = '\0';
6619 }
6620
6621 c2pstr (macappname);
6622
6623 iErr = FSMakeFSSpec (0, 0, macappname, &spec);
6624
6625 if (iErr != noErr) {
6626 free (param);
6627 return -1;
6628 }
6629
6630 lpbr.launchBlockID = extendedBlock;
6631 lpbr.launchEPBLength = extendedBlockLen;
6632 lpbr.launchControlFlags = launchContinue + launchNoFileFlags;
6633 lpbr.launchAppSpec = &spec;
6634 lpbr.launchAppParameters = NULL;
6635
6636 iErr = LaunchApplication (&lpbr); /* call the subprocess */
6637 if (iErr != noErr) {
6638 free (param);
6639 return -1;
6640 }
6641
6642 sendEvent.what = kHighLevelEvent;
6643 sendEvent.message = kEmacsSubprocessSend; /* Event ID stored in "where" unused */
6644
6645 retries = 3;
6646 do { /* OS may think current subprocess has terminated if previous one terminated recently */
6647 iErr = PostHighLevelEvent (&sendEvent, &lpbr.launchProcessSN, 0, param, paramlen + 1, receiverIDisPSN);
6648 }
6649 while (iErr == sessClosedErr && retries-- > 0);
6650
6651 if (iErr != noErr) {
6652 free (param);
6653 return -1;
6654 }
6655
6656 cursorRegionHdl = NewRgn ();
6657
6658 /* Wait for the subprocess to finish, when it will send us a ERPY high level event */
6659 while (1)
6660 if (WaitNextEvent (highLevelEventMask, &replyEvent, 180, cursorRegionHdl) && replyEvent.message == kEmacsSubprocessReply)
6661 break;
6662
6663 /* The return code is sent through the refCon */
6664 iErr = AcceptHighLevelEvent (&targ, &refCon, NULL, &len);
6665 if (iErr != noErr) {
6666 DisposeHandle ((Handle) cursorRegionHdl);
6667 free (param);
6668 return -1;
6669 }
6670
6671 DisposeHandle ((Handle) cursorRegionHdl);
6672 free (param);
6673
6674 return refCon;
6675}
6676
6677DIR *
6678opendir (const char *dirname)
6679{
6680 char MacPathname[MAXPATHLEN+1];
6681 DIR *dirp;
6682 CInfoPBRec cipb;
6683 int len;
6684
6685 dirp = (DIR *) malloc (sizeof (DIR));
6686 if (!dirp)
6687 return 0;
6688
6689 /* Handle special case when dirname is "/": sets up for readir to
6690 get all mount volumes. */
6691 if (strcmp (dirname, "/") == 0) {
6692 dirp->getting_volumes = 1; /* special all mounted volumes DIR struct */
6693 dirp->current_index = 1; /* index for first volume */
6694 return dirp;
6695 }
6696
6697 /* Handle typical cases: not accessing all mounted volumes. */
6698 if (Unix2MacPathname (dirname, MacPathname, MAXPATHLEN+1) == 0)
6699 return 0;
6700
6701 /* Emacs calls opendir without the trailing '/', Mac needs trailing ':' */
6702 len = strlen (MacPathname);
6703 if (MacPathname[len - 1] != ':' && len < MAXPATHLEN)
6704 strcat (MacPathname, ":");
6705
6706 c2pstr (MacPathname);
6707 cipb.hFileInfo.ioNamePtr = MacPathname; /* using full pathname so vRefNum and dirID ignored */
6708 cipb.hFileInfo.ioVRefNum = 0;
6709 cipb.hFileInfo.ioDirID = 0;
6710 cipb.hFileInfo.ioFDirIndex = 0; /* set to 0 to get information about specific dir or file */
6711
6712 errno = PBGetCatInfo (&cipb, false);
6713 if (errno != noErr) {
6714 errno = ENOENT;
6715 return 0;
6716 }
6717
6718 if (!(cipb.hFileInfo.ioFlAttrib & 0x10)) /* bit 4 = 1 for directories */
6719 return 0; /* not a directory */
6720
6721 dirp->dir_id = cipb.dirInfo.ioDrDirID; /* used later in readdir */
6722 dirp->getting_volumes = 0;
6723 dirp->current_index = 1; /* index for first file/directory */
6724
6725 return dirp;
6726}
6727
6728int
6729closedir (DIR *dp)
6730{
6731 free (dp);
6732
6733 return 0;
6734}
6735
6736struct dirent *
6737readdir (DIR *dp)
6738{
6739 HParamBlockRec HPBlock;
6740 CInfoPBRec cipb;
6741 static struct dirent s_dirent;
6742 static Str255 s_name;
6743 int done;
6744
6745 /* Handle the root directory containing the mounted volumes. Call
6746 PBHGetVInfo specifying an index to obtain the info for a volume.
6747 PBHGetVInfo returns an error when it receives an index beyond the
6748 last volume, at which time we should return a nil dirent struct
6749 pointer. */
6750 if (dp->getting_volumes) {
6751 HPBlock.volumeParam.ioNamePtr = s_name;
6752 HPBlock.volumeParam.ioVRefNum = 0;
6753 HPBlock.volumeParam.ioVolIndex = dp->current_index;
6754
6755 errno = PBHGetVInfo (&HPBlock, false);
6756 if (errno != noErr) {
6757 errno = ENOENT;
6758 return 0;
6759 }
6760
6761 p2cstr (s_name);
6762 strcat (s_name, "/"); /* need "/" for stat to work correctly */
6763
6764 dp->current_index++;
6765
6766 s_dirent.d_ino = cipb.dirInfo.ioDrDirID;
6767 s_dirent.d_name = s_name;
6768
6769 return &s_dirent;
6770 }
6771 else {
6772 cipb.hFileInfo.ioVRefNum = 0;
6773 cipb.hFileInfo.ioNamePtr = s_name; /* location to receive filename returned */
6774
6775 /* return only visible files */
6776 done = false;
6777 while (!done) {
6778 cipb.hFileInfo.ioDirID = dp->dir_id; /* directory ID found by opendir */
6779 cipb.hFileInfo.ioFDirIndex = dp->current_index;
6780
6781 errno = PBGetCatInfo (&cipb, false);
6782 if (errno != noErr) {
6783 errno = ENOENT;
6784 return 0;
6785 }
6786
6787 /* insist on an visibile entry */
6788 if (cipb.hFileInfo.ioFlAttrib & 0x10) /* directory? */
6789 done = !(cipb.dirInfo.ioDrUsrWds.frFlags & fInvisible);
6790 else
6791 done = !(cipb.hFileInfo.ioFlFndrInfo.fdFlags & fInvisible);
6792
6793 dp->current_index++;
6794 }
6795
6796 p2cstr (s_name);
6797
6798 s_dirent.d_ino = cipb.dirInfo.ioDrDirID; /* value unimportant: non-zero for valid file */
6799 s_dirent.d_name = s_name;
6800
6801 return &s_dirent;
6802 }
6803}
6804
6805char *
6806getwd (char *path)
6807{
6808 char MacPathname[MAXPATHLEN+1];
6809 Str255 directoryName;
6810 OSErr errno;
6811 CInfoPBRec cipb;
6812
6813 MacPathname[0] = '\0';
6814 directoryName[0] = '\0';
6815 cipb.dirInfo.ioDrParID = 0;
6816 cipb.dirInfo.ioNamePtr = directoryName; /* empty string = default directory */
6817
6818 do {
6819 cipb.dirInfo.ioVRefNum = 0;
6820 cipb.dirInfo.ioFDirIndex = -1;
6821 cipb.dirInfo.ioDrDirID = cipb.dirInfo.ioDrParID; /* go up to parent each time */
6822
6823 errno = PBGetCatInfo (&cipb, false);
6824 if (errno != noErr) {
6825 errno = ENOENT;
6826 return 0;
6827 }
6828
6829 p2cstr (directoryName);
6830 strcat (directoryName, ":");
6831 strcat (directoryName, MacPathname); /* attach to front since going up directory tree */
6832 strcpy (MacPathname, directoryName);
6833 } while (cipb.dirInfo.ioDrDirID != fsRtDirID); /* until volume's root directory */
6834
6835 if (Mac2UnixPathname (MacPathname, path, MAXPATHLEN+1) == 0)
6836 return 0;
6837 else
6838 return path;
6839}
6840
6841#endif /* macintosh */
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