1 /* Interfaces to system-dependent kernel and library entries.
2 Copyright (C) 1985-1988, 1992-1995 Free Software Foundation, Inc.
3 Copyright (C) 1995 Tinker Systems.
5 This file is part of XEmacs.
7 XEmacs is free software; you can redistribute it and/or modify it
8 under the terms of the GNU General Public License as published by the
9 Free Software Foundation; either version 2, or (at your option) any
12 XEmacs is distributed in the hope that it will be useful, but WITHOUT
13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 You should have received a copy of the GNU General Public License
18 along with XEmacs; see the file COPYING. If not, write to
19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
22 /* Synched up with: FSF 19.30 except for some Windows-NT crap. */
24 /* Substantially cleaned up by Ben Wing, Dec. 1994 / Jan. 1995. */
26 /* In this file, open, read and write refer to the system calls,
27 not our sugared interfaces sys_open, sys_read and sys_write.
30 #define DONT_ENCAPSULATE
37 /* <process.h> should not conflict with "process.h", as per ANSI definition.
38 This is not true though with visual c though. The trick below works with
39 VC4.2b and with VC5.0. It assumes that VC is installed in a kind of
40 standard way, so include files get to what/ever/path/include.
42 Unfortunately, this must go before lisp.h, since process.h defines abort()
43 which will conflict with the macro defined in lisp.h
45 #include <../include/process.h>
47 #include <mingw32/process.h>
49 #endif /* WINDOWSNT */
55 /* ------------------------------- */
57 /* ------------------------------- */
60 #include "console-tty.h"
62 #include "syssignal.h"
66 #include "console-stream.h"
71 #include "redisplay.h"
77 #ifdef HAVE_LIBGEN_H /* Must come before sysfile.h */
84 #if defined(WINDOWSNT) || defined(__CYGWIN32__)
85 #include "syssignal.h"
88 #include <sys/times.h>
92 #include <sys/utime.h>
97 /* ------------------------------- */
99 /* ------------------------------- */
102 #include <sys/utsname.h>
103 #if defined (TIOCGWINSZ) || defined (ISC4_0)
105 #include <sys/sioctl.h>
108 #include <sys/stream.h>
109 #include <sys/ptem.h>
111 #endif /* TIOCGWINSZ or ISC4_0 */
114 #ifdef HAVE_SYS_STROPTS_H
115 #include <sys/stropts.h>
116 #endif /* HAVE_SYS_STROPTS_H */
118 /* LPASS8 is new in 4.3, and makes cbreak mode provide all 8 bits. */
129 static int baud_convert[] =
134 0, 50, 75, 110, 135, 150, 200, 300, 600, 1200,
135 1800, 2400, 4800, 9600, 19200, 38400
142 static void hft_init (struct console *c);
143 static void hft_reset (struct console *c);
144 #include <sys/termio.h>
147 /* ------------------------------- */
149 /* ------------------------------- */
152 #ifndef HAVE_STRUCT_UTIMBUF
153 /* We want to use utime rather than utimes, but we couldn't find the
154 structure declaration. We'll use the traditional one. */
164 /************************************************************************/
165 /* subprocess control */
166 /************************************************************************/
172 /* Arrange for character C to be read as the next input from
175 stuff_char (struct console *con, int c)
179 assert (CONSOLE_TTY_P (con));
180 input_fd = CONSOLE_TTY_DATA (con)->infd;
181 /* Should perhaps error if in batch mode */
183 ioctl (input_fd, TIOCSTI, &c);
184 #else /* no TIOCSTI */
185 error ("Cannot stuff terminal input characters in this version of Unix.");
186 #endif /* no TIOCSTI */
191 #endif /* HAVE_TTY */
194 set_exclusive_use (int fd)
197 ioctl (fd, FIOCLEX, 0);
199 /* Ok to do nothing if this feature does not exist */
203 set_descriptor_non_blocking (int fd)
205 /* Stride people say it's a mystery why this is needed
206 as well as the O_NDELAY, but that it fails without this. */
207 /* For AIX: Apparently need this for non-blocking reads on sockets.
208 It seems that O_NONBLOCK applies only to FIFOs? From
209 lowry@watson.ibm.com (Andy Lowry). */
210 /* #### Should this be conditionalized on FIONBIO? */
211 #if defined (STRIDE) || (defined (pfa) && defined (HAVE_PTYS)) || defined (AIX)
214 ioctl (fd, FIONBIO, &one);
219 fcntl (fd, F_SETFL, O_NONBLOCK);
223 #if defined (NO_SUBPROCESSES)
227 wait_without_blocking (void)
229 wait3 (0, WNOHANG | WUNTRACED, 0);
230 synch_process_alive = 0;
234 #endif /* NO_SUBPROCESSES */
238 void wait_for_termination (HANDLE pHandle)
240 void wait_for_termination (int pid)
243 /* #### With the new improved SIGCHLD handling stuff, there is much
244 less danger of race conditions and some of the comments below
245 don't apply. This should be updated. */
247 #if defined (NO_SUBPROCESSES)
250 /* No need to be tricky like below; we can just call wait(). */
251 /* #### should figure out how to write a wait_allowing_quit().
252 Since hardly any systems don't have subprocess support,
253 however, there doesn't seem to be much point. */
257 #elif defined (HAVE_WAITPID)
258 /* Note that, whenever any subprocess terminates (asynch. or synch.),
259 the SIGCHLD handler will be called and it will call wait(). Thus
260 we cannot just call wait() ourselves, and we can't block SIGCHLD
261 and then call wait(), because then if an asynch. process dies
262 while we're waiting for our synch. process, Emacs will never
263 notice that the asynch. process died.
265 So, the general approach we take is to repeatedly block until a
266 signal arrives, and then check if our process died using kill
267 (pid, 0). (We could also check the value of `synch_process_alive',
268 since the SIGCHLD handler will reset that and we know that we're
269 only being called on synchronous processes, but this approach is
270 safer. I don't trust the proper delivery of SIGCHLD.
272 Note also that we cannot use any form of waitpid(). A loop with
273 WNOHANG will chew up CPU time; better to use sleep(). A loop
274 without WNOWAIT will screw up the SIGCHLD handler (actually this
275 is not true, if you duplicate the exit-status-reaping code; see
276 below). A loop with WNOWAIT will result in a race condition if
277 the process terminates between the process-status check and the
278 call to waitpid(). */
280 /* Formerly, immediate_quit was set around this function call, but
281 that could lead to problems if the QUIT happened when SIGCHLD was
282 blocked -- it would remain blocked. Yet another reason why
283 immediate_quit is a bad idea. In any case, there is no reason to
284 resort to this because either the SIGIO or the SIGALRM will stop
285 the block in EMACS_WAIT_FOR_SIGNAL(). */
287 /* Apparently there are bugs on some systems with the second method
288 used below (the EMACS_BLOCK_SIGNAL method), whereby zombie
289 processes get left around. It appears in those cases that the
290 SIGCHLD handler is never getting invoked. It's not clear whether
291 this is an Emacs bug or a kernel bug or both: on HPUX this
292 problem is observed only with XEmacs, but under Solaris 2.4 all
293 sorts of different programs have problems with zombies. The
294 method we use here does not require a working SIGCHLD (but will
295 not break if it is working), and should be safe. */
297 We use waitpid(), contrary to the remarks above. There is no
298 race condition, because the three situations when sigchld_handler
299 is invoked should be handled OK:
301 - handler invoked before waitpid(): In this case, subprocess
302 status will be set by sigchld_handler. waitpid() here will
303 return -1 with errno set to ECHILD, which is a valid exit
306 - handler invoked during waitpid(): as above, except that errno
307 here will be set to EINTR. This will cause waitpid() to be
308 called again, and this time it will exit with ECHILD.
310 - handler invoked after waitpid(): The following code will reap
311 the subprocess. In the handler, wait() will return -1 because
312 there is no child to reap, and the handler will exit without
313 modifying child subprocess status. */
316 /* Because the SIGCHLD handler can potentially reap the synchronous
317 subprocess, we should take care of that. */
319 /* Will stay in the do loop as long as:
321 2. Ctrl-G is not pressed */
325 ret = waitpid (pid, &status, 0);
326 /* waitpid returns 0 if the process is still alive. */
328 while (ret == 0 || (ret == -1 && errno == EINTR));
330 if (ret == pid) /* Success */
331 /* Set synch process globals. This is can also happen
332 in sigchld_handler, and that code is duplicated. */
334 synch_process_alive = 0;
335 if (WIFEXITED (status))
336 synch_process_retcode = WEXITSTATUS (status);
337 else if (WIFSIGNALED (status))
338 synch_process_death = signal_name (WTERMSIG (status));
340 /* On exiting the loop, ret will be -1, with errno set to ECHILD if
341 the child has already been reaped, e.g. in the signal handler. */
343 /* Otherwise, we've had some error condition here.
344 Per POSIX, the only other possibilities are:
345 - EFAULT (bus error accessing arg 2) or
346 - EINVAL (incorrect arguments),
347 which are both program bugs.
349 Since implementations may add their own error indicators on top,
350 we ignore it by default. */
351 #elif defined (WINDOWSNT)
352 int ret = 0, status = 0;
355 warn_when_safe (Qprocess, Qwarning, "Cannot wait for unknown process to terminate");
361 ret = WaitForSingleObject(pHandle, 100);
363 while (ret == WAIT_TIMEOUT);
364 if (ret == WAIT_FAILED)
366 warn_when_safe (Qprocess, Qwarning, "waiting for process failed");
368 if (ret == WAIT_ABANDONED)
370 warn_when_safe (Qprocess, Qwarning,
371 "process to wait for has been abandoned");
373 if (ret == WAIT_OBJECT_0)
375 ret = GetExitCodeProcess(pHandle, &status);
378 synch_process_alive = 0;
379 synch_process_retcode = status;
383 /* GetExitCodeProcess() didn't return a valid exit status,
384 nothing to do. APA */
385 warn_when_safe (Qprocess, Qwarning,
386 "failure to obtain process exit value");
389 if (pHandle != NULL && !CloseHandle(pHandle))
391 warn_when_safe (Qprocess, Qwarning,
392 "failure to close unknown process");
394 #elif defined (EMACS_BLOCK_SIGNAL) && !defined (BROKEN_WAIT_FOR_SIGNAL) && defined (SIGCHLD)
397 static int wait_debugging = 0; /* Set nonzero to make following
398 function work under dbx (at least for bsd). */
403 EMACS_BLOCK_SIGNAL (SIGCHLD);
404 /* Block SIGCHLD from happening during this check,
405 to avoid race conditions. */
406 if (kill (pid, 0) < 0)
408 EMACS_UNBLOCK_SIGNAL (SIGCHLD);
412 /* WARNING: Whatever this macro does *must* not allow SIGCHLD
413 to happen between the time that it's reenabled and when we
414 begin to block. Otherwise we may end up blocking for a
415 signal that has already arrived and isn't coming again.
416 Can you say "race condition"?
418 I assume that the system calls sigpause() or sigsuspend()
419 to provide this atomicness. If you're getting hangs in
420 sigpause()/sigsuspend(), then your OS doesn't implement
421 this properly (this applies under hpux9, for example).
422 Try defining BROKEN_WAIT_FOR_SIGNAL. */
423 EMACS_WAIT_FOR_SIGNAL (SIGCHLD);
425 #else /* not HAVE_WAITPID and not WINDOWSNT and (not EMACS_BLOCK_SIGNAL or BROKEN_WAIT_FOR_SIGNAL) */
426 /* This approach is kind of cheesy but is guaranteed(?!) to work
431 if (kill (pid, 0) < 0)
435 #endif /* OS features */
439 #if !defined (NO_SUBPROCESSES)
442 * flush any pending output
443 * (may flush input as well; it does not matter the way we use it)
447 flush_pending_output (int channel)
450 /* If we try this, we get hit with SIGTTIN, because
451 the child's tty belongs to the child's pgrp. */
452 #elif defined (TCFLSH)
453 ioctl (channel, TCFLSH, 1);
454 #elif defined (TIOCFLUSH)
456 /* 3rd arg should be ignored
457 but some 4.2 kernels actually want the address of an int
458 and nonzero means something different. */
459 ioctl (channel, TIOCFLUSH, &zero);
464 /* Set up the terminal at the other end of a pseudo-terminal that
465 we will be controlling an inferior through.
466 It should not echo or do line-editing, since that is done
467 in Emacs. No padding needed for insertion into an Emacs buffer. */
470 child_setup_tty (int out)
473 emacs_get_tty (out, &s);
475 #if defined (HAVE_TERMIO) || defined (HAVE_TERMIOS)
476 assert (isatty(out));
477 s.main.c_oflag |= OPOST; /* Enable output postprocessing */
478 s.main.c_oflag &= ~ONLCR; /* Disable map of NL to CR-NL on output */
480 s.main.c_oflag &= ~(NLDLY|CRDLY|TABDLY|BSDLY|VTDLY|FFDLY);
481 /* No output delays */
483 s.main.c_lflag &= ~ECHO; /* Disable echo */
484 s.main.c_lflag |= ISIG; /* Enable signals */
486 s.main.c_iflag &= ~IUCLC; /* Disable downcasing on input. */
489 s.main.c_oflag &= ~OLCUC; /* Disable upcasing on output. */
491 s.main.c_oflag &= ~TAB3; /* Disable tab expansion */
492 #if defined (CSIZE) && defined (CS8)
493 s.main.c_cflag = (s.main.c_cflag & ~CSIZE) | CS8; /* Don't strip 8th bit */
496 s.main.c_iflag &= ~ISTRIP; /* Don't strip 8th bit on input */
499 /* Unnecessary as long as ICANON is set */
500 s.main.c_cc[VMIN] = 1; /* minimum number of characters to accept */
501 s.main.c_cc[VTIME] = 0; /* wait forever for at least 1 character */
504 s.main.c_lflag |= ICANON; /* Enable erase/kill and eof processing */
505 s.main.c_cc[VEOF] = 04; /* ensure that EOF is Control-D */
506 s.main.c_cc[VERASE] = _POSIX_VDISABLE; /* disable erase processing */
507 s.main.c_cc[VKILL] = _POSIX_VDISABLE; /* disable kill processing */
510 s.main.c_cflag = (s.main.c_cflag & ~CBAUD) | B9600; /* baud rate sanity */
515 /* AIX enhanced edit loses NULs, so disable it. */
517 s.main.c_iflag &= ~ASCEDIT;
518 #endif /* IBMR2AIX */
519 /* Also, PTY overloads NUL and BREAK.
520 don't ignore break, but don't signal either, so it looks like NUL.
521 This really serves a purpose only if running in an XTERM window
522 or via TELNET or the like, but does no harm elsewhere. */
523 s.main.c_iflag &= ~IGNBRK;
524 s.main.c_iflag &= ~BRKINT;
526 #ifdef SIGNALS_VIA_CHARACTERS
527 /* TTY `special characters' are used in process_send_signal
528 so set them here to something useful. */
529 s.main.c_cc[VQUIT] = '\\'&037; /* Control-\ */
530 s.main.c_cc[VINTR] = 'C' &037; /* Control-C */
531 s.main.c_cc[VSUSP] = 'Z' &037; /* Control-Z */
532 #else /* no TIOCGPGRP or no TIOCGLTC or no TIOCGETC */
533 /* TTY `special characters' work better as signals, so disable
535 s.main.c_cc[VQUIT] = _POSIX_VDISABLE;
536 s.main.c_cc[VINTR] = _POSIX_VDISABLE;
537 s.main.c_cc[VSUSP] = _POSIX_VDISABLE;
538 s.main.c_lflag &= ~ISIG;
539 #endif /* no TIOCGPGRP or no TIOCGLTC or no TIOCGETC */
540 s.main.c_cc[VEOL] = _POSIX_VDISABLE;
542 /* <mdiers> ### This is not portable. ###
543 POSIX does not specify CBAUD, and 4.4BSD does not have it.
544 Instead, POSIX suggests to use cfset{i,o}speed().
545 [cf. D. Lewine, POSIX Programmer's Guide, Chapter 8: Terminal
546 I/O, O'Reilly 1991] */
547 s.main.c_cflag = (s.main.c_cflag & ~CBAUD) | B9600; /* baud rate sanity */
549 /* <mdiers> What to do upon failure? Just ignoring rc is probably
550 not acceptable, is it? */
551 if (cfsetispeed (&s.main, B9600) == -1) /* ignore */;
552 if (cfsetospeed (&s.main, B9600) == -1) /* ignore */;
553 #endif /* defined (CBAUD) */
555 #else /* not HAVE_TERMIO */
557 s.main.sg_flags &= ~(ECHO | CRMOD | ANYP | ALLDELAY | RAW | LCASE
559 s.main.sg_flags |= LPASS8;
560 s.main.sg_erase = 0377;
561 s.main.sg_kill = 0377;
562 s.lmode = LLITOUT | s.lmode; /* Don't strip 8th bit */
564 #endif /* not HAVE_TERMIO */
565 emacs_set_tty (out, &s, 0);
570 ioctl (out, FIOASYNC, &zero);
574 #endif /* WINDOWSNT */
576 #endif /* not NO_SUBPROCESSES */
579 #if !defined (SIGTSTP) && !defined (USG_JOBCTRL)
581 #if defined(__STDC__) || defined(_MSC_VER)
582 #define SIG_PARAM_TYPE int
584 #define SIG_PARAM_TYPE
587 /* Record a signal code and the handler for it. */
591 SIGTYPE (*handler) (SIG_PARAM_TYPE);
595 save_signal_handlers (struct save_signal *saved_handlers)
597 while (saved_handlers->code)
599 saved_handlers->handler
600 = (SIGTYPE (*) (SIG_PARAM_TYPE)) signal (saved_handlers->code, SIG_IGN);
606 restore_signal_handlers (struct save_signal *saved_handlers)
608 while (saved_handlers->code)
610 signal (saved_handlers->code, saved_handlers->handler);
619 return abs (getpid ());
621 #endif /* WINDOWSNT */
623 /* Fork a subshell. */
632 struct save_signal saved_handlers[5];
634 unsigned char *str = 0;
638 saved_handlers[0].code = SIGINT;
639 saved_handlers[1].code = SIGQUIT;
640 saved_handlers[2].code = SIGTERM;
642 saved_handlers[3].code = SIGIO;
643 saved_handlers[4].code = 0;
645 saved_handlers[3].code = 0;
648 /* Mentioning current_buffer->buffer would mean including buffer.h,
649 which somehow wedges the hp compiler. So instead... */
651 if (NILP (Fboundp (Qdefault_directory)))
653 dir = Fsymbol_value (Qdefault_directory);
658 dir = Funhandled_file_name_directory (dir);
659 dir = expand_and_dir_to_file (dir, Qnil);
661 str = (unsigned char *) alloca (XSTRING_LENGTH (dir) + 2);
662 len = XSTRING_LENGTH (dir);
663 memcpy (str, XSTRING_DATA (dir), len);
664 /* #### Unix specific */
665 if (str[len - 1] != '/') str[len++] = '/';
671 #else /* not WINDOWSNT */
676 error ("Can't spawn subshell");
679 #endif /* not WINDOWSNT */
684 sh = (char *) egetenv ("SHELL");
688 /* Use our buffer's default directory for the subshell. */
692 #if !defined (NO_SUBPROCESSES) && !defined (WINDOWSNT)
693 close_process_descs (); /* Close Emacs's pipes/ptys */
696 #ifdef SET_EMACS_PRIORITY
697 if (emacs_priority != 0)
698 nice (-emacs_priority); /* Give the new shell the default priority */
702 /* Waits for process completion */
703 pid = _spawnlp (_P_WAIT, sh, sh, NULL);
705 write (1, "Can't execute subshell", 22);
707 #else /* not WINDOWSNT */
709 write (1, "Can't execute subshell", 22);
711 #endif /* not WINDOWSNT */
714 save_signal_handlers (saved_handlers);
715 synch_process_alive = 1;
716 wait_for_termination (pid);
717 restore_signal_handlers (saved_handlers);
720 #endif /* !defined (SIGTSTP) && !defined (USG_JOBCTRL) */
724 /* Suspend the Emacs process; give terminal to its superior. */
728 #if defined (SIGTSTP)
730 int pgrp = EMACS_GET_PROCESS_GROUP ();
731 EMACS_KILLPG (pgrp, SIGTSTP);
734 #elif defined (USG_JOBCTRL)
735 /* If you don't know what this is don't mess with it */
736 ptrace (0, 0, 0, 0); /* set for ptrace - caught by csh */
737 kill (getpid (), SIGQUIT);
739 #else /* No SIGTSTP or USG_JOBCTRL */
741 /* On a system where suspending is not implemented,
742 instead fork a subshell and let it talk directly to the terminal
749 /* Suspend a process if possible; give terminal to its superior. */
751 sys_suspend_process (int process)
753 /* I don't doubt that it is possible to suspend processes on
754 * VMS machines or thost that use USG_JOBCTRL,
755 * but I don't know how to do it, so...
757 #if defined (SIGTSTP)
758 kill(process, SIGTSTP);
763 /* Given FD, obtain pty buffer size. When no luck, a good guess is made,
764 so that the function works even fd is not a pty. */
767 get_pty_max_bytes (int fd)
771 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
772 pty_max_bytes = fpathconf (fd, _PC_MAX_CANON);
773 if (pty_max_bytes < 0)
777 /* Deduct one, to leave space for the eof. */
780 return pty_max_bytes;
783 /* Figure out the eof character for the FD. */
786 get_eof_char (int fd)
788 CONST Bufbyte ctrl_d = (Bufbyte) '\004';
797 /* What is the following line designed to do??? -mrb */
798 if (strlen ((CONST char *) t.c_cc) < (unsigned int) (VEOF + 1))
801 return (Bufbyte) t.c_cc[VEOF];
803 return t.c_cc[VEOF] == _POSIX_VDISABLE ? ctrl_d : (Bufbyte) t.c_cc[VEOF];
805 #else /* ! HAVE_TERMIOS */
806 /* On Berkeley descendants, the following IOCTL's retrieve the
807 current control characters. */
808 #if defined (TIOCGETC)
811 ioctl (fd, TIOCGETC, &c);
812 return (Bufbyte) c.t_eofc;
814 #else /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
815 /* On SYSV descendants, the TCGETA ioctl retrieves the current control
820 ioctl (fd, TCGETA, &t);
821 if (strlen ((CONST char *) t.c_cc) < (unsigned int) (VINTR + 1))
824 return (Bufbyte) t.c_cc[VINTR];
826 #else /* ! defined (TCGETA) */
827 /* Rather than complain, we'll just guess ^D, which is what
828 * earlier emacsen always used. */
830 #endif /* ! defined (TCGETA) */
831 #endif /* ! defined (TIOCGETC) */
832 #endif /* ! defined (HAVE_TERMIOS) */
835 /* Set the logical window size associated with descriptor FD
836 to HEIGHT and WIDTH. This is used mainly with ptys. */
839 set_window_size (int fd, int height, int width)
845 size.ws_row = height;
848 if (ioctl (fd, TIOCSWINSZ, &size) == -1)
849 return 0; /* error */
853 #elif defined (TIOCSSIZE)
857 size.ts_lines = height;
858 size.ts_cols = width;
860 if (ioctl (fd, TIOCGSIZE, &size) == -1)
871 /* Set up the proper status flags for use of a pty. */
876 /* I'm told that TOICREMOTE does not mean control chars
877 "can't be sent" but rather that they don't have
878 input-editing or signaling effects.
879 That should be good, because we have other ways
880 to do those things in Emacs.
881 However, telnet mode seems not to work on 4.2.
882 So TIOCREMOTE is turned off now. */
884 /* Under hp-ux, if TIOCREMOTE is turned on, some calls
885 will hang. In particular, the "timeout" feature (which
886 causes a read to return if there is no data available)
887 does this. Also it is known that telnet mode will hang
888 in such a way that Emacs must be stopped (perhaps this
889 is the same problem).
891 If TIOCREMOTE is turned off, then there is a bug in
892 hp-ux which sometimes loses data. Apparently the
893 code which blocks the master process when the internal
894 buffer fills up does not work. Other than this,
895 though, everything else seems to work fine.
897 Since the latter lossage is more benign, we may as well
898 lose that way. -- cph */
899 #if defined (FIONBIO) && defined (SYSV_PTYS)
902 ioctl (fd, FIONBIO, &on);
906 /* On AIX, the parent gets SIGHUP when a pty attached child dies. So, we */
907 /* ignore SIGHUP once we've started a child on a pty. Note that this may */
908 /* cause EMACS not to die when it should, i.e., when its own controlling */
909 /* tty goes away. I've complained to the AIX developers, and they may */
910 /* change this behavior, but I'm not going to hold my breath. */
911 signal (SIGHUP, SIG_IGN);
914 /* In some systems (Linux through 2.0.0, at least), packet mode doesn't
915 get cleared when a pty is closed, so we need to clear it here.
916 Linux pre2.0.13 contained an attempted fix for this (from Ted Ts'o,
917 tytso@mit.edu), but apparently it messed up rlogind and telnetd, so he
918 removed the fix in pre2.0.14. - dkindred@cs.cmu.edu
922 ioctl (fd, TIOCPKT, (char *)&off);
926 #endif /* HAVE_PTYS */
929 /************************************************************************/
931 /************************************************************************/
933 /* ------------------------------------------------------ */
935 /* ------------------------------------------------------ */
937 /* It really makes more sense for the baud-rate to be console-specific
938 and not device-specific, but it's (at least potentially) used for output
942 init_baud_rate (struct device *d)
944 struct console *con = XCONSOLE (DEVICE_CONSOLE (d));
945 if (DEVICE_WIN_P (d) || DEVICE_STREAM_P (d))
947 DEVICE_BAUD_RATE (d) = 38400;
952 assert (DEVICE_TTY_P (d));
954 int input_fd = CONSOLE_TTY_DATA (con)->infd;
955 #if defined (WINDOWSNT)
956 DEVICE_TTY_DATA (d)->ospeed = 15;
957 #elif defined (HAVE_TERMIOS)
961 tcgetattr (input_fd, &sg);
962 DEVICE_TTY_DATA (d)->ospeed = cfgetospeed (&sg);
963 # if defined (USE_GETOBAUD) && defined (getobaud)
964 /* m88k-motorola-sysv3 needs this (ghazi@noc.rutgers.edu) 9/1/94. */
965 if (DEVICE_TTY_DATA (d)->ospeed == 0)
966 DEVICE_TTY_DATA (d)->ospeed = getobaud (sg.c_cflag);
968 #elif defined (HAVE_TERMIO)
973 tcgetattr (input_fd, &sg);
975 ioctl (input_fd, TCGETA, &sg);
977 DEVICE_TTY_DATA (d)->ospeed = sg.c_cflag & CBAUD;
978 #else /* neither TERMIOS nor TERMIO */
981 sg.sg_ospeed = B9600;
982 if (ioctl (input_fd, TIOCGETP, &sg) < 0)
984 DEVICE_TTY_DATA (d)->ospeed = sg.sg_ospeed;
988 DEVICE_BAUD_RATE (d) =
989 (DEVICE_TTY_DATA (d)->ospeed < countof (baud_convert)
990 ? baud_convert[DEVICE_TTY_DATA (d)->ospeed]
993 if (DEVICE_BAUD_RATE (d) == 0)
994 DEVICE_BAUD_RATE (d) = 1200;
995 #endif /* HAVE_TTY */
999 /* ------------------------------------------------------ */
1001 /* ------------------------------------------------------ */
1003 #if defined(SIGIO) && !defined(BROKEN_SIGIO)
1006 init_sigio_on_device (struct device *d)
1008 int filedesc = DEVICE_INFD (d);
1010 #if defined (FIOSSAIOOWN)
1012 int owner = getpid ();
1014 if (DEVICE_TTY_P (d))
1016 ioctl_status = ioctl (filedesc, FIOGSAIOOWN,
1017 &DEVICE_OLD_FCNTL_OWNER (d));
1018 ioctl_status = ioctl (filedesc, FIOSSAIOOWN, &owner);
1020 #ifdef HAVE_WINDOW_SYSTEM
1021 else if (!DEVICE_STREAM_P (d))
1023 ioctl_status = ioctl (filedesc, SIOCGPGRP,
1024 &DEVICE_OLD_FCNTL_OWNER (d));
1025 ioctl_status = ioctl (filedesc, SIOCSPGRP, &owner);
1029 #elif defined (F_SETOWN) && !defined (F_SETOWN_BUG)
1030 DEVICE_OLD_FCNTL_OWNER (d) = fcntl (filedesc, F_GETOWN, 0);
1031 # ifdef F_SETOWN_SOCK_NEG
1032 /* stdin is a socket here */
1033 fcntl (filedesc, F_SETOWN, -getpid ());
1035 fcntl (filedesc, F_SETOWN, getpid ());
1041 reset_sigio_on_device (struct device *d)
1043 int filedesc = DEVICE_INFD (d);
1045 #if defined (FIOSSAIOOWN)
1048 if (DEVICE_TTY_P (d))
1050 ioctl_status = ioctl (filedesc, FIOSSAIOOWN,
1051 &DEVICE_OLD_FCNTL_OWNER (d));
1053 #ifdef HAVE_WINDOW_SYSTEM
1054 else if (!DEVICE_STREAM_P (d))
1056 ioctl_status = ioctl (filedesc, SIOCSPGRP,
1057 &DEVICE_OLD_FCNTL_OWNER (d));
1061 #elif defined (F_SETOWN) && !defined (F_SETOWN_BUG)
1062 fcntl (filedesc, F_SETOWN, DEVICE_OLD_FCNTL_OWNER (d));
1067 request_sigio_on_device (struct device *d)
1069 int filedesc = DEVICE_INFD (d);
1071 #if defined (I_SETSIG) && !defined(HPUX10) && !defined(LINUX)
1074 ioctl (filedesc, I_GETSIG, &events);
1075 ioctl (filedesc, I_SETSIG, events | S_INPUT);
1077 #elif defined (FASYNC)
1078 fcntl (filedesc, F_SETFL, fcntl (filedesc, F_GETFL, 0) | FASYNC);
1079 #elif defined (FIOSSAIOSTAT)
1081 /* DG: Changed for HP-UX. HP-UX uses different IOCTLs for
1082 sockets and other devices for some bizarre reason. We guess
1083 that an X device is a socket, and tty devices aren't. We then
1084 use the following crud to do the appropriate thing. */
1086 int ioctl_status; /* ####DG: check if IOCTL succeeds here. */
1088 if (DEVICE_TTY_P (d))
1090 ioctl_status = ioctl (filedesc, FIOSSAIOSTAT, &on);
1092 #ifdef HAVE_WINDOW_SYSTEM
1093 else if (!DEVICE_STREAM_P (d))
1095 ioctl_status = ioctl (filedesc, FIOASYNC, &on);
1099 #elif defined (FIOASYNC)
1102 ioctl (filedesc, FIOASYNC, &on);
1106 #if defined (_CX_UX) /* #### Is this crap necessary? */
1107 EMACS_UNBLOCK_SIGNAL (SIGIO);
1112 unrequest_sigio_on_device (struct device *d)
1114 int filedesc = DEVICE_INFD (d);
1116 #if defined (I_SETSIG) && !defined(HPUX10)
1119 ioctl (filedesc, I_GETSIG, &events);
1120 ioctl (filedesc, I_SETSIG, events & ~S_INPUT);
1122 #elif defined (FASYNC)
1123 fcntl (filedesc, F_SETFL, fcntl (filedesc, F_GETFL, 0) & ~FASYNC);
1124 #elif defined (FIOSSAIOSTAT)
1126 /* DG: Changed for HP-UX. HP-UX uses different IOCTLs for
1127 sockets and other devices for some bizarre reason. We guess
1128 that an X device is a socket, and tty devices aren't. We then
1129 use the following crud to do the appropriate thing. */
1134 /* See comment for request_sigio_on_device */
1136 if (DEVICE_TTY_P (d))
1138 ioctl_status = ioctl (filedesc, FIOSSAIOSTAT, &off);
1142 ioctl_status = ioctl (filedesc, FIOASYNC, &off);
1145 #elif defined (FIOASYNC)
1148 ioctl (filedesc, FIOASYNC, &off);
1154 request_sigio (void)
1156 Lisp_Object devcons, concons;
1158 DEVICE_LOOP_NO_BREAK (devcons, concons)
1162 d = XDEVICE (XCAR (devcons));
1164 if (!DEVICE_STREAM_P (d))
1165 request_sigio_on_device (d);
1170 unrequest_sigio (void)
1172 Lisp_Object devcons, concons;
1174 DEVICE_LOOP_NO_BREAK (devcons, concons)
1178 d = XDEVICE (XCAR (devcons));
1180 if (!DEVICE_STREAM_P (d))
1181 unrequest_sigio_on_device (d);
1187 /* ------------------------------------------------------ */
1188 /* Changing Emacs's process group */
1189 /* ------------------------------------------------------ */
1191 /* Saving and restoring the process group of Emacs's terminal. */
1193 /* On some systems, apparently (?!) Emacs must be in its own process
1194 group in order to receive SIGIO correctly. On other systems
1195 (e.g. Solaris), it's not required and doing it makes things
1196 get fucked up. So, we only do it when
1197 SIGIO_REQUIRES_SEPARATE_PROCESS_GROUP is defined. Basically,
1198 this is only required for BSD 4.2 systems. (Actually, I bet
1199 we don't have to do this at all -- those systems also
1200 required interrupt input, which we don't support.)
1202 If Emacs was in its own process group (i.e. inherited_pgroup ==
1203 getpid ()), then we know we're running under a shell with job
1204 control (Emacs would never be run as part of a pipeline).
1207 If Emacs was not in its own process group, then we know we're
1208 running under a shell (or a caller) that doesn't know how to
1209 separate itself from Emacs (like sh). Emacs must be in its own
1210 process group in order to receive SIGIO correctly. In this
1211 situation, we put ourselves in our own pgroup, forcibly set the
1212 tty's pgroup to our pgroup, and make sure to restore and reinstate
1213 the tty's pgroup just like any other terminal setting. If
1214 inherited_group was not the tty's pgroup, then we'll get a
1215 SIGTTmumble when we try to change the tty's pgroup, and a CONT if
1216 it goes foreground in the future, which is what should happen. */
1218 #ifdef SIGIO_REQUIRES_SEPARATE_PROCESS_GROUP
1220 static int inherited_pgroup;
1221 static int inherited_tty_pgroup;
1226 munge_tty_process_group (void)
1228 #ifdef SIGIO_REQUIRES_SEPARATE_PROCESS_GROUP
1232 /* Only do this munging if we have a device on the controlling
1233 terminal. See the large comment below. */
1235 if (CONSOLEP (Vcontrolling_terminal) &&
1236 CONSOLE_LIVE_P (XCONSOLE (Vcontrolling_terminal)))
1238 int fd = open ("/dev/tty", O_RDWR, 0);
1240 EMACS_BLOCK_SIGNAL (SIGTTOU);
1241 EMACS_SET_TTY_PROCESS_GROUP (fd, &me);
1242 EMACS_UNBLOCK_SIGNAL (SIGTTOU);
1248 /* Split off the foreground process group to Emacs alone.
1249 When we are in the foreground, but not started in our own process
1250 group, redirect the TTY to point to our own process group. We need
1251 to be in our own process group to receive SIGIO properly. */
1253 munge_process_groups (void)
1255 #ifdef SIGIO_REQUIRES_SEPARATE_PROCESS_GROUP
1259 EMACS_SEPARATE_PROCESS_GROUP ();
1261 munge_tty_process_group ();
1266 unmunge_tty_process_group (void)
1268 #ifdef SIGIO_REQUIRES_SEPARATE_PROCESS_GROUP
1270 int fd = open ("/dev/tty", O_RDWR, 0);
1271 EMACS_BLOCK_SIGNAL (SIGTTOU);
1272 EMACS_SET_TTY_PROCESS_GROUP (fd, &inherited_tty_pgroup);
1273 EMACS_UNBLOCK_SIGNAL (SIGTTOU);
1279 /* Set the tty to our original foreground group.
1280 Also restore the original process group (put us back into sh's
1281 process group), so that ^Z will suspend both us and sh. */
1283 unmunge_process_groups (void)
1285 #ifdef SIGIO_REQUIRES_SEPARATE_PROCESS_GROUP
1289 unmunge_tty_process_group ();
1291 EMACS_SET_PROCESS_GROUP (inherited_pgroup);
1295 /* According to some old wisdom, we need to be in a separate process
1296 group for SIGIO to work correctly (at least on some systems ...).
1297 So go ahead and put ourselves into our own process group. This
1298 will fail if we're already in our own process group, but who cares.
1299 Also record whether we were in our own process group. (In general,
1300 we will already be in our own process group if we were started from
1301 a job-control shell like csh, but not if we were started from sh).
1303 If we succeeded in changing our process group, then we will no
1304 longer be in the foreground process group of our controlling
1305 terminal. Therefore, if we have a console open onto this terminal,
1306 we have to change the controlling terminal's foreground process
1307 group (otherwise we will get stopped with a SIGTTIN signal when
1308 attempting to read from the terminal). It's important,
1309 however, that we do this *only* when we have a console open onto
1310 the terminal. It's a decidedly bad idea to do so otherwise,
1311 especially if XEmacs was started from the background. */
1314 init_process_group (void)
1316 #ifdef SIGIO_REQUIRES_SEPARATE_PROCESS_GROUP
1317 if (! noninteractive)
1319 int fd = open ("/dev/tty", O_RDWR, 0);
1320 inherited_pgroup = EMACS_GET_PROCESS_GROUP ();
1321 EMACS_GET_TTY_PROCESS_GROUP (fd, &inherited_tty_pgroup);
1323 EMACS_SEPARATE_PROCESS_GROUP ();
1329 disconnect_controlling_terminal (void)
1332 /* Controlling terminals are attached to a session.
1333 Create a new session for us; it will have no controlling
1334 terminal. This also, of course, puts us in our own
1338 /* Put us in our own process group. */
1339 EMACS_SEPARATE_PROCESS_GROUP ();
1340 # if defined (TIOCNOTTY)
1341 /* This is the older way of disconnecting the controlling
1342 terminal, on 4.3 BSD. We must open /dev/tty; using
1343 filedesc 0 is not sufficient because it could be
1344 something else (e.g. our stdin was redirected to
1348 int j = open ("/dev/tty", O_RDWR, 0);
1349 ioctl (j, TIOCNOTTY, 0);
1352 # endif /* TIOCNOTTY */
1354 On systems without TIOCNOTTY and without
1355 setsid(), we don't need to do anything more to
1356 disconnect our controlling terminal. Here is
1357 what the man page for termio(7) from a SYSV 3.2
1360 "The first terminal file opened by the process group leader
1361 of a terminal file not already associated with a process
1362 group becomes the control terminal for that process group.
1363 The control terminal plays a special role in handling quit
1364 and interrupt signals, as discussed below. The control
1365 terminal is inherited by a child process during a fork(2).
1366 A process can break this association by changing its process
1367 group using setpgrp(2)."
1370 # endif /* not HAVE_SETSID */
1374 /* ------------------------------------------------------ */
1375 /* Getting and setting emacs_tty structures */
1376 /* ------------------------------------------------------ */
1378 /* It's wrong to encase these into #ifdef HAVE_TTY because we need
1379 them for child TTY processes. */
1380 /* However, this does break NT support while we don't do child TTY processes */
1383 /* Set *TC to the parameters associated with the terminal FD.
1384 Return zero if all's well, or -1 if we ran into an error we
1385 couldn't deal with. */
1387 emacs_get_tty (int fd, struct emacs_tty *settings)
1389 /* Retrieve the primary parameters - baud rate, character size, etcetera. */
1391 /* We have those nifty POSIX tcmumbleattr functions. */
1392 if (tcgetattr (fd, &settings->main) < 0)
1395 #elif defined HAVE_TERMIO
1396 /* The SYSV-style interface? */
1397 if (ioctl (fd, TCGETA, &settings->main) < 0)
1400 #elif !defined (WINDOWSNT)
1401 /* I give up - I hope you have the BSD ioctls. */
1402 if (ioctl (fd, TIOCGETP, &settings->main) < 0)
1404 #endif /* HAVE_TCATTR */
1406 /* Suivant - Do we have to get struct ltchars data? */
1408 if (ioctl (fd, TIOCGLTC, &settings->ltchars) < 0)
1412 /* How about a struct tchars and a wordful of lmode bits? */
1414 if (ioctl (fd, TIOCGETC, &settings->tchars) < 0
1415 || ioctl (fd, TIOCLGET, &settings->lmode) < 0)
1419 /* We have survived the tempest. */
1423 /* Set the parameters of the tty on FD according to the contents of
1424 *SETTINGS. If FLUSHP is non-zero, we discard input.
1425 Return 0 if all went well, and -1 if anything failed.
1426 #### All current callers use FLUSHP == 0. */
1429 emacs_set_tty (int fd, struct emacs_tty *settings, int flushp)
1431 /* Set the primary parameters - baud rate, character size, etcetera. */
1434 /* We have those nifty POSIX tcmumbleattr functions.
1435 William J. Smith <wjs@wiis.wang.com> writes:
1436 "POSIX 1003.1 defines tcsetattr() to return success if it was
1437 able to perform any of the requested actions, even if some
1438 of the requested actions could not be performed.
1439 We must read settings back to ensure tty setup properly.
1440 AIX requires this to keep tty from hanging occasionally." */
1441 /* This makes sure that we don't loop indefinitely in here. */
1442 for (i = 0 ; i < 10 ; i++)
1443 if (tcsetattr (fd, flushp ? TCSAFLUSH : TCSADRAIN, &settings->main) < 0)
1454 /* Get the current settings, and see if they're what we asked for. */
1455 tcgetattr (fd, &new);
1456 /* We cannot use memcmp on the whole structure here because under
1457 * aix386 the termios structure has some reserved field that may
1460 if ( new.c_iflag == settings->main.c_iflag
1461 && new.c_oflag == settings->main.c_oflag
1462 && new.c_cflag == settings->main.c_cflag
1463 && new.c_lflag == settings->main.c_lflag
1464 && memcmp(new.c_cc, settings->main.c_cc, NCCS) == 0)
1469 #elif defined HAVE_TERMIO
1470 /* The SYSV-style interface? */
1471 if (ioctl (fd, flushp ? TCSETAF : TCSETAW, &settings->main) < 0)
1474 #elif !defined (WINDOWSNT)
1475 /* I give up - I hope you have the BSD ioctls. */
1476 if (ioctl (fd, (flushp) ? TIOCSETP : TIOCSETN, &settings->main) < 0)
1478 #endif /* HAVE_TCATTR */
1480 /* Suivant - Do we have to get struct ltchars data? */
1482 if (ioctl (fd, TIOCSLTC, &settings->ltchars) < 0)
1486 /* How about a struct tchars and a wordful of lmode bits? */
1488 if (ioctl (fd, TIOCSETC, &settings->tchars) < 0
1489 || ioctl (fd, TIOCLSET, &settings->lmode) < 0)
1493 /* We have survived the tempest. */
1497 #endif /* WINDOWSNT */
1499 /* ------------------------------------------------------ */
1500 /* Initializing a device */
1501 /* ------------------------------------------------------ */
1505 /* This may also be defined in stdio,
1506 but if so, this does no harm,
1507 and using the same name avoids wasting the other one's space. */
1509 #if ((defined(USG) || defined(DGUX)) && !defined(__STDC__))
1510 char _sobuf[BUFSIZ+8];
1511 #elif (defined(USG) && !defined(LINUX) && !defined(_SCO_DS)) || defined(IRIX5)
1512 extern unsigned char _sobuf[BUFSIZ+8];
1514 char _sobuf[BUFSIZ];
1517 #if defined (TIOCGLTC) && defined (HAVE_LTCHARS) /* HAVE_LTCHARS */
1518 static struct ltchars new_ltchars = {-1,-1,-1,-1,-1,-1};
1520 #ifdef TIOCGETC /* HAVE_TCHARS */
1522 static struct tchars new_tchars = {-1,-1,-1,-1,-1,-1};
1527 tty_init_sys_modes_on_device (struct device *d)
1529 struct emacs_tty tty;
1530 int input_fd, output_fd;
1531 struct console *con = XCONSOLE (DEVICE_CONSOLE (d));
1533 input_fd = CONSOLE_TTY_DATA (con)->infd;
1534 output_fd = CONSOLE_TTY_DATA (con)->outfd;
1536 emacs_get_tty (input_fd, &CONSOLE_TTY_DATA (con)->old_tty);
1537 tty = CONSOLE_TTY_DATA (con)->old_tty;
1539 con->tty_erase_char = Qnil;
1541 #if defined (HAVE_TERMIO) || defined (HAVE_TERMIOS)
1542 /* after all those years... */
1543 con->tty_erase_char = make_char (tty.main.c_cc[VERASE]);
1545 /* This allows meta to be sent on 8th bit. */
1546 tty.main.c_iflag &= ~INPCK; /* don't check input for parity */
1548 tty.main.c_iflag |= (IGNBRK); /* Ignore break condition */
1549 tty.main.c_iflag &= ~ICRNL; /* Disable map of CR to NL on input */
1551 tty.main.c_iflag &= ~ISTRIP; /* don't strip 8th bit on input */
1553 tty.main.c_lflag &= ~ECHO; /* Disable echo */
1554 tty.main.c_lflag &= ~ICANON; /* Disable erase/kill processing */
1556 tty.main.c_lflag &= ~IEXTEN; /* Disable other editing characters. */
1558 tty.main.c_lflag |= ISIG; /* Enable signals */
1559 if (TTY_FLAGS (con).flow_control)
1561 tty.main.c_iflag |= IXON; /* Enable start/stop output control */
1563 tty.main.c_iflag &= ~IXANY;
1567 tty.main.c_iflag &= ~IXON; /* Disable start/stop output control */
1568 tty.main.c_oflag &= ~ONLCR; /* Disable map of NL to CR-NL
1570 tty.main.c_oflag &= ~TAB3; /* Disable tab expansion */
1572 if (TTY_FLAGS (con).meta_key)
1574 tty.main.c_cflag |= CS8; /* allow 8th bit on input */
1575 tty.main.c_cflag &= ~PARENB;/* Don't check parity */
1578 if (CONSOLE_TTY_DATA (con)->controlling_terminal)
1580 tty.main.c_cc[VINTR] =
1581 CONSOLE_QUIT_CHAR (con); /* C-g (usually) gives SIGINT */
1582 /* Set up C-g for both SIGQUIT and SIGINT.
1583 We don't know which we will get, but we handle both alike
1584 so which one it really gives us does not matter. */
1585 tty.main.c_cc[VQUIT] = CONSOLE_QUIT_CHAR (con);
1589 tty.main.c_cc[VINTR] = _POSIX_VDISABLE;
1590 tty.main.c_cc[VQUIT] = _POSIX_VDISABLE;
1592 tty.main.c_cc[VMIN] = 1; /* Input should wait for at
1594 tty.main.c_cc[VTIME] = 0; /* no matter how long that takes. */
1596 tty.main.c_cc[VSWTCH] = _POSIX_VDISABLE; /* Turn off shell layering use
1599 /* There was some conditionalizing here on (mips or TCATTR), but
1600 I think that's wrong. There was one report of C-y (DSUSP) not being
1601 disabled on HP9000s700 systems, and this might fix it. */
1603 tty.main.c_cc[VSUSP] = _POSIX_VDISABLE; /* Turn off mips handling of C-z. */
1606 tty.main.c_cc[V_DSUSP] = _POSIX_VDISABLE; /* Turn off mips handling of C-y. */
1607 #endif /* V_DSUSP */
1608 #ifdef VDSUSP /* Some systems have VDSUSP, some have V_DSUSP. */
1609 tty.main.c_cc[VDSUSP] = _POSIX_VDISABLE;
1612 tty.main.c_cc[VLNEXT] = _POSIX_VDISABLE;
1615 tty.main.c_cc[VREPRINT] = _POSIX_VDISABLE;
1616 #endif /* VREPRINT */
1618 tty.main.c_cc[VWERASE] = _POSIX_VDISABLE;
1619 #endif /* VWERASE */
1621 tty.main.c_cc[VDISCARD] = _POSIX_VDISABLE;
1622 #endif /* VDISCARD */
1624 tty.main.c_cc[VSTART] = _POSIX_VDISABLE;
1627 tty.main.c_cc[VSTRT] = _POSIX_VDISABLE; /* called VSTRT on some systems */
1630 tty.main.c_cc[VSTOP] = _POSIX_VDISABLE;
1632 #ifdef SET_LINE_DISCIPLINE
1633 /* Need to explicitly request TERMIODISC line discipline or
1634 Ultrix's termios does not work correctly. */
1635 tty.main.c_line = SET_LINE_DISCIPLINE;
1640 /* AIX enhanced edit loses NULs, so disable it. */
1641 tty.main.c_line = 0;
1642 tty.main.c_iflag &= ~ASCEDIT;
1644 tty.main.c_cc[VSTRT] = 255;
1645 tty.main.c_cc[VSTOP] = 255;
1646 tty.main.c_cc[VSUSP] = 255;
1647 tty.main.c_cc[VDSUSP] = 255;
1648 #endif /* IBMR2AIX */
1649 /* Also, PTY overloads NUL and BREAK.
1650 don't ignore break, but don't signal either, so it looks like NUL.
1651 This really serves a purpose only if running in an XTERM window
1652 or via TELNET or the like, but does no harm elsewhere. */
1653 tty.main.c_iflag &= ~IGNBRK;
1654 tty.main.c_iflag &= ~BRKINT;
1656 #else /* if not HAVE_TERMIO */
1657 #if !defined (WINDOWSNT)
1658 con->tty_erase_char = make_char (tty.main.sg_erase);
1659 tty.main.sg_flags &= ~(ECHO | CRMOD | XTABS);
1660 if (TTY_FLAGS (con).meta_key)
1661 tty.main.sg_flags |= ANYP;
1662 /* #### should we be using RAW mode here? */
1663 tty.main.sg_flags |= /* interrupt_input ? RAW : */ CBREAK;
1664 #endif /* not WINDOWSNT */
1665 #endif /* not HAVE_TERMIO */
1667 /* If going to use CBREAK mode, we must request C-g to interrupt
1668 and turn off start and stop chars, etc. If not going to use
1669 CBREAK mode, do this anyway so as to turn off local flow
1670 control for user coming over network on 4.2; in this case,
1671 only t_stopc and t_startc really matter. */
1674 /* Note: if not using CBREAK mode, it makes no difference how we
1676 tty.tchars = new_tchars;
1677 tty.tchars.t_intrc = CONSOLE_QUIT_CHAR (con);
1678 if (TTY_FLAGS (con).flow_control)
1680 tty.tchars.t_startc = '\021';
1681 tty.tchars.t_stopc = '\023';
1684 tty.lmode = LDECCTQ | LLITOUT | LPASS8 | LNOFLSH |
1685 CONSOLE_TTY_DATA (con)->old_tty.lmode;
1687 #if defined (ultrix) || defined (__bsdi__)
1688 /* Under Ultrix 4.2a, leaving this out doesn't seem to hurt
1689 anything, and leaving it in breaks the meta key. Go figure. */
1690 /* Turning off ONLCR is enough under BSD/386. Leave the general
1691 output post-processing flag alone since for some reason it
1692 doesn't get reset after XEmacs goes away. */
1693 tty.lmode &= ~LLITOUT;
1696 #endif /* HAVE_TCHARS */
1697 #endif /* not HAVE_TERMIO */
1700 tty.ltchars = new_ltchars;
1701 #endif /* HAVE_LTCHARS */
1703 emacs_set_tty (input_fd, &tty, 0);
1705 /* This code added to insure that, if flow-control is not to be used,
1706 we have an unlocked terminal at the start. */
1709 if (!TTY_FLAGS (con).flow_control) ioctl (input_fd, TCXONC, 1);
1713 if (!TTY_FLAGS (con).flow_control) ioctl (input_fd, TIOCSTART, 0);
1717 #if defined (HAVE_TERMIOS) || defined (HPUX9)
1719 if (!TTY_FLAGS (con).flow_control) tcflow (input_fd, TCOON);
1726 /* IBM's HFT device usually thinks a ^J should be LF/CR.
1727 We need it to be only LF. This is the way that is
1731 if (ioctl (output_fd, HFTGETID, &tty) != -1)
1732 write (output_fd, "\033[20l", 5);
1737 #if 0 /* We do our own buffering with lstreams. */
1739 /* This symbol is defined on recent USG systems.
1740 Someone says without this call USG won't really buffer the file
1741 even with a call to setbuf. */
1742 setvbuf (CONSOLE_TTY_DATA (con)->outfd, (char *) _sobuf, _IOFBF, sizeof _sobuf);
1744 setbuf (CONSOLE_TTY_DATA (con)->outfd, (char *) _sobuf);
1747 set_tty_modes (con);
1750 #endif /* HAVE_TTY */
1753 init_one_device (struct device *d)
1756 if (DEVICE_TTY_P (d))
1757 tty_init_sys_modes_on_device (d);
1759 #if defined(SIGIO) && !defined(BROKEN_SIGIO)
1760 if (!DEVICE_STREAM_P (d))
1762 init_sigio_on_device (d);
1763 request_sigio_on_device (d);
1769 init_one_console (struct console *con)
1771 Lisp_Object devcons;
1773 CONSOLE_DEVICE_LOOP (devcons, con)
1775 struct device *d = XDEVICE (XCAR (devcons));
1777 init_one_device (d);
1782 reinit_initial_console (void)
1784 munge_process_groups ();
1785 if (CONSOLEP (Vcontrolling_terminal) &&
1786 CONSOLE_LIVE_P (XCONSOLE (Vcontrolling_terminal)))
1787 init_one_console (XCONSOLE (Vcontrolling_terminal));
1791 /* ------------------------------------------------------ */
1792 /* Other TTY functions */
1793 /* ------------------------------------------------------ */
1797 #if 0 /* not currently used */
1799 /* Return nonzero if safe to use tabs in output.
1800 At the time this is called, init_sys_modes has not been done yet. */
1803 tabs_safe_p (struct device *d)
1806 if (DEVICE_TTY_P (d))
1808 struct emacs_tty tty;
1810 emacs_get_tty (DEVICE_INFD (d), &tty);
1811 return EMACS_TTY_TABS_OK (&tty);
1819 /* Get terminal size from system.
1820 Store number of lines into *heightp and width into *widthp.
1821 If zero or a negative number is stored, the value is not valid. */
1824 get_tty_device_size (struct device *d, int *widthp, int *heightp)
1826 int input_fd = DEVICE_INFD (d);
1828 assert (DEVICE_TTY_P (d));
1833 struct winsize size;
1835 if (ioctl (input_fd, TIOCGWINSZ, &size) == -1)
1836 *widthp = *heightp = 0;
1839 *widthp = size.ws_col;
1840 *heightp = size.ws_row;
1843 #elif defined TIOCGSIZE
1845 /* SunOS - style. */
1846 struct ttysize size;
1848 if (ioctl (input_fd, TIOCGSIZE, &size) == -1)
1849 *widthp = *heightp = 0;
1852 *widthp = size.ts_cols;
1853 *heightp = size.ts_lines;
1856 #else /* system doesn't know size */
1861 #endif /* not !TIOCGWINSZ */
1864 #endif /* HAVE_TTY */
1867 /* ------------------------------------------------------ */
1868 /* Is device 8 bit ? */
1869 /* ------------------------------------------------------ */
1874 eight_bit_tty (struct device *d)
1880 assert (DEVICE_TTY_P (d));
1881 input_fd = DEVICE_INFD (d);
1883 emacs_get_tty (input_fd, &s);
1885 #if defined (HAVE_TERMIO) || defined (HAVE_TERMIOS)
1886 eight_bit = (s.main.c_cflag & CSIZE) == CS8;
1888 eight_bit = 0; /* I don't know how to do it */
1893 #endif /* HAVE_TTY */
1896 /* ------------------------------------------------------ */
1897 /* Resetting a device */
1898 /* ------------------------------------------------------ */
1902 /* Prepare the terminal for exiting Emacs; move the cursor to the
1903 bottom of the frame, turn off interrupt-driven I/O, etc. */
1905 tty_reset_sys_modes_on_device (struct device *d)
1907 int input_fd, output_fd;
1908 struct console *con = XCONSOLE (DEVICE_CONSOLE (d));
1910 input_fd = CONSOLE_TTY_DATA (con)->infd;
1911 output_fd = CONSOLE_TTY_DATA (con)->outfd;
1913 #if defined (IBMR2AIX) && defined (AIXHFT)
1915 /* HFT consoles normally use ^J as a LF/CR. We forced it to
1916 do the LF only. Now, we need to reset it. */
1919 if (ioctl (output_fd, HFTGETID, &tty) != -1)
1920 write (output_fd, "\033[20h", 5);
1924 tty_redisplay_shutdown (con);
1925 /* reset_tty_modes() flushes the connection at its end. */
1926 reset_tty_modes (con);
1929 /* Avoid possible loss of output when changing terminal modes. */
1933 while (emacs_set_tty (input_fd, &CONSOLE_TTY_DATA (con)->old_tty, 0)
1934 < 0 && errno == EINTR)
1937 #ifdef SET_LINE_DISCIPLINE
1938 /* Ultrix's termios *ignores* any line discipline except TERMIODISC.
1939 A different old line discipline is therefore not restored, yet.
1940 Restore the old line discipline by hand. */
1941 ioctl (input_fd, TIOCSETD, &old_tty.main.c_line);
1950 #endif /* HAVE_TTY */
1953 reset_one_device (struct device *d)
1956 if (DEVICE_TTY_P (d))
1957 tty_reset_sys_modes_on_device (d);
1960 if (DEVICE_STREAM_P (d))
1961 fflush (CONSOLE_STREAM_DATA (XCONSOLE (DEVICE_CONSOLE (d)))->out);
1962 #if defined(SIGIO) && !defined(BROKEN_SIGIO)
1963 if (!DEVICE_STREAM_P (d))
1965 unrequest_sigio_on_device (d);
1966 reset_sigio_on_device (d);
1972 reset_one_console (struct console *con)
1974 /* Note: this can be called during GC. */
1975 Lisp_Object devcons;
1977 CONSOLE_DEVICE_LOOP (devcons, con)
1979 struct device *d = XDEVICE (XCAR (devcons));
1981 reset_one_device (d);
1986 reset_all_consoles (void)
1988 /* Note: this can be called during GC. */
1989 Lisp_Object concons;
1991 CONSOLE_LOOP (concons)
1993 struct console *con = XCONSOLE (XCAR (concons));
1995 reset_one_console (con);
1998 unmunge_process_groups ();
2002 reset_initial_console (void)
2004 if (CONSOLEP (Vcontrolling_terminal) &&
2005 CONSOLE_LIVE_P (XCONSOLE (Vcontrolling_terminal)))
2006 reset_one_console (XCONSOLE (Vcontrolling_terminal));
2007 unmunge_process_groups ();
2011 /* ------------------------------------------------------ */
2012 /* extra TTY stuff under AIX */
2013 /* ------------------------------------------------------ */
2017 /* Called from init_sys_modes. */
2019 hft_init (struct console *con)
2024 assert (CONSOLE_TTY_P (con));
2025 input_fd = CONSOLE_TTY_DATA (con)->infd;
2027 /* If we're not on an HFT we shouldn't do any of this. We determine
2028 if we are on an HFT by trying to get an HFT error code. If this
2029 call fails, we're not on an HFT. */
2031 if (ioctl (input_fd, HFQERROR, &junk) < 0)
2033 #else /* not IBMR2AIX */
2034 if (ioctl (input_fd, HFQEIO, 0) < 0)
2036 #endif /* not IBMR2AIX */
2038 /* On AIX the default hft keyboard mapping uses backspace rather than delete
2039 as the rubout key's ASCII code. Here this is changed. The bug is that
2040 there's no way to determine the old mapping, so in reset_one_console
2041 we need to assume that the normal map had been present. Of course, this
2042 code also doesn't help if on a terminal emulator which doesn't understand
2046 struct hfkeymap keymap;
2048 buf.hf_bufp = (char *)&keymap;
2049 buf.hf_buflen = sizeof (keymap);
2050 keymap.hf_nkeys = 2;
2051 keymap.hfkey[0].hf_kpos = 15;
2052 keymap.hfkey[0].hf_kstate = HFMAPCHAR | HFSHFNONE;
2054 keymap.hfkey[0].hf_keyidh = '<';
2055 #else /* not IBMR2AIX */
2056 keymap.hfkey[0].hf_page = '<';
2057 #endif /* not IBMR2AIX */
2058 keymap.hfkey[0].hf_char = 127;
2059 keymap.hfkey[1].hf_kpos = 15;
2060 keymap.hfkey[1].hf_kstate = HFMAPCHAR | HFSHFSHFT;
2062 keymap.hfkey[1].hf_keyidh = '<';
2063 #else /* not IBMR2AIX */
2064 keymap.hfkey[1].hf_page = '<';
2065 #endif /* not IBMR2AIX */
2066 keymap.hfkey[1].hf_char = 127;
2067 hftctl (input_fd, HFSKBD, &buf);
2069 /* #### Should probably set a console TTY flag here. */
2071 /* The HFT system on AIX doesn't optimize for scrolling, so it's really ugly
2073 line_ins_del_ok = char_ins_del_ok = 0;
2077 /* Reset the rubout key to backspace. */
2080 hft_reset (struct console *con)
2083 struct hfkeymap keymap;
2087 assert (CONSOLE_TTY_P (con));
2088 input_fd = CONSOLE_TTY_DATA (con)->infd;
2091 if (ioctl (input_fd, HFQERROR, &junk) < 0)
2093 #else /* not IBMR2AIX */
2094 if (ioctl (input_fd, HFQEIO, 0) < 0)
2096 #endif /* not IBMR2AIX */
2098 buf.hf_bufp = (char *)&keymap;
2099 buf.hf_buflen = sizeof (keymap);
2100 keymap.hf_nkeys = 2;
2101 keymap.hfkey[0].hf_kpos = 15;
2102 keymap.hfkey[0].hf_kstate = HFMAPCHAR | HFSHFNONE;
2104 keymap.hfkey[0].hf_keyidh = '<';
2105 #else /* not IBMR2AIX */
2106 keymap.hfkey[0].hf_page = '<';
2107 #endif /* not IBMR2AIX */
2108 keymap.hfkey[0].hf_char = 8;
2109 keymap.hfkey[1].hf_kpos = 15;
2110 keymap.hfkey[1].hf_kstate = HFMAPCHAR | HFSHFSHFT;
2112 keymap.hfkey[1].hf_keyidh = '<';
2113 #else /* not IBMR2AIX */
2114 keymap.hfkey[1].hf_page = '<';
2115 #endif /* not IBMR2AIX */
2116 keymap.hfkey[1].hf_char = 8;
2117 hftctl (input_fd, HFSKBD, &buf);
2123 /************************************************************************/
2124 /* limits of text/data segments */
2125 /************************************************************************/
2131 #ifndef SYSTEM_MALLOC
2138 /* Some systems that cannot dump also cannot implement these. */
2141 * Return the address of the start of the text segment prior to
2142 * doing an unexec. After unexec the return value is undefined.
2143 * See crt0.c for further explanation and _start.
2148 extern "C" int _start (void);
2150 extern int _start (void);
2153 #ifndef HAVE_TEXT_START
2155 start_of_text (void)
2158 return ((char *) TEXT_START);
2162 return ((char *) csrt);
2163 #else /* not GOULD */
2164 return ((char *) _start);
2166 #endif /* TEXT_START */
2168 #endif /* not HAVE_TEXT_START */
2171 * Return the address of the start of the data segment prior to
2172 * doing an unexec. After unexec the return value is undefined.
2173 * See crt0.c for further information and definition of data_start.
2175 * Apparently, on BSD systems this is etext at startup. On
2176 * USG systems (swapping) this is highly mmu dependent and
2177 * is also dependent on whether or not the program is running
2178 * with shared text. Generally there is a (possibly large)
2179 * gap between end of text and start of data with shared text.
2181 * On Uniplus+ systems with shared text, data starts at a
2182 * fixed address. Each port (from a given oem) is generally
2183 * different, and the specific value of the start of data can
2184 * be obtained via the UniPlus+ specific "uvar" system call,
2185 * however the method outlined in crt0.c seems to be more portable.
2187 * Probably what will have to happen when a USG unexec is available,
2188 * at least on UniPlus, is temacs will have to be made unshared so
2189 * that text and data are contiguous. Then once loadup is complete,
2190 * unexec will produce a shared executable where the data can be
2191 * at the normal shared text boundary and the startofdata variable
2192 * will be patched by unexec to the correct value.
2196 #ifdef ORDINARY_LINK
2197 extern char **environ;
2201 start_of_data (void)
2204 return ((char *) DATA_START);
2206 #ifdef ORDINARY_LINK
2208 * This is a hack. Since we're not linking crt0.c or pre_crt0.c,
2209 * data_start isn't defined. We take the address of environ, which
2210 * is known to live at or near the start of the system crt0.c, and
2211 * we don't sweat the handful of bytes that might lose.
2214 extern char* static_heap_base;
2216 return static_heap_base;
2218 return((char *) &environ);
2220 extern int data_start;
2221 return ((char *) &data_start);
2222 #endif /* ORDINARY_LINK */
2223 #endif /* DATA_START */
2225 #endif /* NEED_STARTS (not CANNOT_DUMP or not SYSTEM_MALLOC) */
2228 /* Some systems that cannot dump also cannot implement these. */
2231 * Return the address of the end of the text segment prior to
2232 * doing an unexec. After unexec the return value is undefined.
2239 return ((char *) TEXT_END);
2242 return ((char *) &etext);
2247 * Return the address of the end of the data segment prior to
2248 * doing an unexec. After unexec the return value is undefined.
2255 return ((char *) DATA_END);
2258 return ((char *) &edata);
2262 #endif /* not CANNOT_DUMP */
2265 /************************************************************************/
2266 /* get the system name */
2267 /************************************************************************/
2269 /* init_system_name sets up the string for the Lisp function
2270 system-name to return. */
2272 extern Lisp_Object Vsystem_name;
2275 # include <sys/socket.h>
2277 #endif /* HAVE_SOCKETS */
2280 init_system_name (void)
2282 #if defined (WINDOWSNT)
2283 char hostname [MAX_COMPUTERNAME_LENGTH + 1];
2284 size_t size = sizeof(hostname);
2285 GetComputerName (hostname, &size);
2286 Vsystem_name = build_string (hostname);
2287 #elif !defined (HAVE_GETHOSTNAME)
2290 Vsystem_name = build_string (uts.nodename);
2291 #else /* HAVE_GETHOSTNAME */
2292 unsigned int hostname_size = 256;
2293 char *hostname = (char *) alloca (hostname_size);
2295 /* Try to get the host name; if the buffer is too short, try
2296 again. Apparently, the only indication gethostname gives of
2297 whether the buffer was large enough is the presence or absence
2298 of a '\0' in the string. Eech. */
2301 gethostname (hostname, hostname_size - 1);
2302 hostname[hostname_size - 1] = '\0';
2304 /* Was the buffer large enough for the '\0'? */
2305 if (strlen (hostname) < (size_t) (hostname_size - 1))
2308 hostname_size <<= 1;
2309 hostname = (char *) alloca (hostname_size);
2311 # if defined( HAVE_SOCKETS) && !defined(BROKEN_CYGWIN)
2312 /* Turn the hostname into the official, fully-qualified hostname.
2313 Don't do this if we're going to dump; this can confuse system
2314 libraries on some machines and make the dumped emacs core dump. */
2315 # ifndef CANNOT_DUMP
2317 # endif /* not CANNOT_DUMP */
2318 if (!strchr (hostname, '.'))
2320 struct hostent *hp = NULL;
2323 for (count = 0; count < 10; count++)
2327 /* Some systems can't handle SIGALARM/SIGIO in gethostbyname(). */
2329 hp = gethostbyname (hostname);
2330 start_interrupts ();
2332 if (! (hp == 0 && h_errno == TRY_AGAIN))
2334 Fsleep_for (make_int (1));
2339 CONST char *fqdn = (CONST char *) hp->h_name;
2341 if (!strchr (fqdn, '.'))
2343 /* We still don't have a fully qualified domain name.
2344 Try to find one in the list of alternate names */
2345 char **alias = hp->h_aliases;
2346 while (*alias && !strchr (*alias, '.'))
2351 hostname = (char *) alloca (strlen (fqdn) + 1);
2352 strcpy (hostname, fqdn);
2355 # endif /* HAVE_SOCKETS */
2356 Vsystem_name = build_string (hostname);
2357 #endif /* HAVE_GETHOSTNAME */
2362 for (i = 0, p = XSTRING_DATA (Vsystem_name);
2363 i < XSTRING_LENGTH (Vsystem_name);
2366 if (*p == ' ' || *p == '\t')
2373 /************************************************************************/
2374 /* Emulation of select() */
2375 /************************************************************************/
2379 ERROR: XEmacs requires a working select().
2381 #endif /* not HAVE_SELECT */
2384 /************************************************************************/
2385 /* Emulation of signal stuff */
2386 /************************************************************************/
2388 /* BSD 4.1 crap deleted. 4.2 was released in 1983, for God's sake! I
2389 can't imagine that anyone is actually running that OS any more.
2390 You can't use X under it (I think) because there's no select().
2391 Anyway, the signal stuff has all been changed. If someone wants to
2392 get this stuff working again, look in the FSF Emacs sources. */
2394 /* POSIX signals support - DJB */
2396 #ifdef HAVE_SIGPROCMASK
2398 /* #### Is there any reason this is static global rather than local? */
2399 static struct sigaction new_action, old_action;
2402 sys_do_signal (int signal_number, signal_handler_t action)
2406 /* XEmacs works better if system calls are *not* restarted.
2407 This allows C-g to interrupt reads and writes, on most systems.
2409 #### Another possibility is to just longjmp() out of the signal
2410 handler. According to W.R. Stevens, this should be OK on all
2411 systems. However, I don't want to deal with the potential
2412 evil ramifications of this at this point. */
2415 /* This gets us restartable system calls for efficiency.
2416 The "else" code will work as well. */
2417 return (berk_signal (signal_number, action));
2419 sigemptyset (&new_action.sa_mask);
2420 new_action.sa_handler = action;
2421 #if defined (SA_RESTART)
2422 /* Emacs mostly works better with restartable system services. If this
2423 * flag exists, we probably want to turn it on here.
2425 new_action.sa_flags = SA_RESTART;
2427 new_action.sa_flags = 0;
2429 sigaction (signal_number, &new_action, &old_action);
2430 return (old_action.sa_handler);
2435 sigemptyset (&new_action.sa_mask);
2436 new_action.sa_handler = action;
2437 #if defined (SA_INTERRUPT) /* don't restart system calls, under SunOS */
2438 new_action.sa_flags = SA_INTERRUPT;
2440 new_action.sa_flags = 0;
2442 sigaction (signal_number, &new_action, &old_action);
2443 return (signal_handler_t) (old_action.sa_handler);
2448 #elif defined (HAVE_SIGBLOCK)
2450 /* We use sigvec() rather than signal() if we have it, because
2451 it lets us specify interruptible system calls. */
2453 sys_do_signal (int signal_number, signal_handler_t action)
2455 struct sigvec vec, ovec;
2457 vec.sv_handler = action;
2459 #ifdef SV_INTERRUPT /* don't restart system calls */
2460 vec.sv_flags = SV_INTERRUPT;
2465 sigvec (signal_number, &vec, &ovec);
2467 return (ovec.sv_handler);
2470 #endif /* HAVE_SIGBLOCK (HAVE_SIGPROCMASK) */
2473 /************************************************************************/
2474 /* Emulation of strerror() and errno support */
2475 /************************************************************************/
2477 #ifndef HAVE_STRERROR
2479 #if !defined(NeXT) && !defined(__alpha) && !defined(MACH) && !defined(LINUX) && !defined(IRIX) && !defined(__NetBSD__)
2480 /* Linux added here by Raymond L. Toy <toy@alydar.crd.ge.com> for XEmacs. */
2481 /* Irix added here by gparker@sni-usa.com for XEmacs. */
2482 /* NetBSD added here by James R Grinter <jrg@doc.ic.ac.uk> for XEmacs */
2483 extern CONST char *sys_errlist[];
2484 extern int sys_nerr;
2488 extern char *sys_errlist[];
2489 extern int sys_nerr;
2494 strerror (int errnum)
2496 if (errnum >= 0 && errnum < sys_nerr)
2497 return sys_errlist[errnum];
2498 return ((CONST char *) GETTEXT ("Unknown error"));
2501 #endif /* ! HAVE_STRERROR */
2506 unsigned long oscode; /* Win32 error */
2507 int errnocode; /* unix errno */
2510 static struct errentry errtable[] = {
2511 { ERROR_INVALID_FUNCTION, EINVAL }, /* 1 */
2512 { ERROR_FILE_NOT_FOUND, ENOENT }, /* 2 */
2513 { ERROR_PATH_NOT_FOUND, ENOENT }, /* 3 */
2514 { ERROR_TOO_MANY_OPEN_FILES, EMFILE }, /* 4 */
2515 { ERROR_ACCESS_DENIED, EACCES }, /* 5 */
2516 { ERROR_INVALID_HANDLE, EBADF }, /* 6 */
2517 { ERROR_ARENA_TRASHED, ENOMEM }, /* 7 */
2518 { ERROR_NOT_ENOUGH_MEMORY, ENOMEM }, /* 8 */
2519 { ERROR_INVALID_BLOCK, ENOMEM }, /* 9 */
2520 { ERROR_BAD_ENVIRONMENT, E2BIG }, /* 10 */
2521 { ERROR_BAD_FORMAT, ENOEXEC }, /* 11 */
2522 { ERROR_INVALID_ACCESS, EINVAL }, /* 12 */
2523 { ERROR_INVALID_DATA, EINVAL }, /* 13 */
2524 { ERROR_INVALID_DRIVE, ENOENT }, /* 15 */
2525 { ERROR_CURRENT_DIRECTORY, EACCES }, /* 16 */
2526 { ERROR_NOT_SAME_DEVICE, EXDEV }, /* 17 */
2527 { ERROR_NO_MORE_FILES, ENOENT }, /* 18 */
2528 { ERROR_LOCK_VIOLATION, EACCES }, /* 33 */
2529 { ERROR_BAD_NETPATH, ENOENT }, /* 53 */
2530 { ERROR_NETWORK_ACCESS_DENIED, EACCES }, /* 65 */
2531 { ERROR_BAD_NET_NAME, ENOENT }, /* 67 */
2532 { ERROR_FILE_EXISTS, EEXIST }, /* 80 */
2533 { ERROR_CANNOT_MAKE, EACCES }, /* 82 */
2534 { ERROR_FAIL_I24, EACCES }, /* 83 */
2535 { ERROR_INVALID_PARAMETER, EINVAL }, /* 87 */
2536 { ERROR_NO_PROC_SLOTS, EAGAIN }, /* 89 */
2537 { ERROR_DRIVE_LOCKED, EACCES }, /* 108 */
2538 { ERROR_BROKEN_PIPE, EPIPE }, /* 109 */
2539 { ERROR_DISK_FULL, ENOSPC }, /* 112 */
2540 { ERROR_INVALID_TARGET_HANDLE, EBADF }, /* 114 */
2541 { ERROR_INVALID_HANDLE, EINVAL }, /* 124 */
2542 { ERROR_WAIT_NO_CHILDREN, ECHILD }, /* 128 */
2543 { ERROR_CHILD_NOT_COMPLETE, ECHILD }, /* 129 */
2544 { ERROR_DIRECT_ACCESS_HANDLE, EBADF }, /* 130 */
2545 { ERROR_NEGATIVE_SEEK, EINVAL }, /* 131 */
2546 { ERROR_SEEK_ON_DEVICE, EACCES }, /* 132 */
2547 { ERROR_DIR_NOT_EMPTY, ENOTEMPTY }, /* 145 */
2548 { ERROR_NOT_LOCKED, EACCES }, /* 158 */
2549 { ERROR_BAD_PATHNAME, ENOENT }, /* 161 */
2550 { ERROR_MAX_THRDS_REACHED, EAGAIN }, /* 164 */
2551 { ERROR_LOCK_FAILED, EACCES }, /* 167 */
2552 { ERROR_ALREADY_EXISTS, EEXIST }, /* 183 */
2553 { ERROR_FILENAME_EXCED_RANGE, ENOENT }, /* 206 */
2554 { ERROR_NESTING_NOT_ALLOWED, EAGAIN }, /* 215 */
2555 { ERROR_NOT_ENOUGH_QUOTA, ENOMEM } /* 1816 */
2558 /* The following two constants must be the minimum and maximum
2559 values in the (contiguous) range of Exec Failure errors. */
2560 #define MIN_EXEC_ERROR ERROR_INVALID_STARTING_CODESEG
2561 #define MAX_EXEC_ERROR ERROR_INFLOOP_IN_RELOC_CHAIN
2563 /* These are the low and high value in the range of errors that are
2564 access violations */
2565 #define MIN_EACCES_RANGE ERROR_WRITE_PROTECT
2566 #define MAX_EACCES_RANGE ERROR_SHARING_BUFFER_EXCEEDED
2569 mswindows_set_errno (unsigned long win32_error)
2573 /* check the table for the OS error code */
2574 for (i = 0; i < sizeof(errtable)/sizeof(errtable[0]); ++i)
2576 if (win32_error == errtable[i].oscode)
2578 errno = errtable[i].errnocode;
2583 /* The error code wasn't in the table. We check for a range of
2584 * EACCES errors or exec failure errors (ENOEXEC). Otherwise EINVAL is
2586 if (win32_error >= MIN_EACCES_RANGE && win32_error <= MAX_EACCES_RANGE)
2588 else if (win32_error >= MIN_EXEC_ERROR && win32_error <= MAX_EXEC_ERROR)
2595 mswindows_set_last_errno (void)
2597 mswindows_set_errno (GetLastError ());
2600 #endif /* WINDOWSNT */
2603 /************************************************************************/
2604 /* Encapsulations of system calls */
2605 /************************************************************************/
2607 #define PATHNAME_CONVERT_OUT(path) \
2608 GET_C_CHARPTR_EXT_FILENAME_DATA_ALLOCA ((CONST Bufbyte *) path, path)
2610 /***************** low-level calls ****************/
2613 * On USG systems the system calls are INTERRUPTIBLE by signals
2614 * that the user program has elected to catch. Thus the system call
2615 * must be retried in these cases. To handle this without massive
2616 * changes in the source code, we remap the standard system call names
2617 * to names for our own functions in sysdep.c that do the system call
2618 * with retries. Actually, for portability reasons, it is good
2619 * programming practice, as this example shows, to limit all actual
2620 * system calls to a single occurrence in the source. Sure, this
2621 * adds an extra level of function call overhead but it is almost
2622 * always negligible. Fred Fish, Unisoft Systems Inc.
2625 /* Ben sez: read Dick Gabriel's essay about the Worse Is Better
2626 approach to programming and its connection to the silly
2627 interruptible-system-call business. To find it, look on
2628 Jamie's home page (http://www.jwz.org/worse-is-better.html). */
2630 #ifdef ENCAPSULATE_OPEN
2632 sys_open (CONST char *path, int oflag, ...)
2637 va_start (ap, oflag);
2638 mode = va_arg (ap, int);
2641 PATHNAME_CONVERT_OUT (path);
2642 #if defined (WINDOWSNT)
2643 /* Make all handles non-inheritable */
2644 return open (path, oflag | _O_NOINHERIT, mode);
2645 #elif defined (INTERRUPTIBLE_OPEN)
2648 while ((rtnval = open (path, oflag, mode)) == -1
2649 && (errno == EINTR))
2654 return open (path, oflag, mode);
2657 #endif /* ENCAPSULATE_OPEN */
2659 /* Like sys_open, only when open() is interrupted by EINTR, check for
2660 QUIT. This allows the callers of this function to be interrupted
2661 with C-g when, say, reading from named pipes. However, this should
2662 be used with caution, as it can GC.
2664 This function will not function as expected on systems where open()
2665 is not interrupted by C-g. However, the worst that can happen is
2666 the fallback to simple open(). */
2668 interruptible_open (CONST char *path, int oflag, int mode)
2670 /* This function can GC */
2671 size_t len = strlen (path);
2672 char *nonreloc = (char *) alloca (len + 1);
2674 /* Must copy PATH, because it might be the data of a Lisp_String,
2675 which could be relocated by GC when checking for QUIT. */
2676 memcpy (nonreloc, path, len + 1);
2678 PATHNAME_CONVERT_OUT (nonreloc);
2682 int rtnval = open (nonreloc, oflag, mode);
2683 if (!(rtnval == -1 && errno == EINTR))
2685 /* open() was interrupted. Was QUIT responsible? */
2690 #ifdef ENCAPSULATE_CLOSE
2692 sys_close (int filedes)
2694 #ifdef INTERRUPTIBLE_CLOSE
2696 REGISTER int rtnval;
2698 while ((rtnval = close (filedes)) == -1
2699 && (errno == EINTR))
2702 /* If close is interrupted SunOS 4.1 may or may not have closed the
2703 file descriptor. If it did the second close will fail with
2704 errno = EBADF. That means we have succeeded. */
2705 if (rtnval == -1 && did_retry && errno == EBADF)
2710 return close (filedes);
2713 #endif /* ENCAPSULATE_CLOSE */
2716 sys_read_1 (int fildes, void *buf, size_t nbyte, int allow_quit)
2720 /* No harm in looping regardless of the INTERRUPTIBLE_IO setting. */
2721 while ((rtnval = read (fildes, buf, nbyte)) == -1
2722 && (errno == EINTR))
2730 #ifdef ENCAPSULATE_READ
2732 sys_read (int fildes, void *buf, size_t nbyte)
2734 return sys_read_1 (fildes, buf, nbyte, 0);
2736 #endif /* ENCAPSULATE_READ */
2739 sys_write_1 (int fildes, CONST void *buf, size_t nbyte, int allow_quit)
2741 ssize_t bytes_written = 0;
2742 CONST char *b = (CONST char *) buf;
2744 /* No harm in looping regardless of the INTERRUPTIBLE_IO setting. */
2747 ssize_t rtnval = write (fildes, b, nbyte);
2757 return bytes_written ? bytes_written : -1;
2761 bytes_written += rtnval;
2763 return bytes_written;
2766 #ifdef ENCAPSULATE_WRITE
2768 sys_write (int fildes, CONST void *buf, size_t nbyte)
2770 return sys_write_1 (fildes, buf, nbyte, 0);
2772 #endif /* ENCAPSULATE_WRITE */
2775 /**************** stdio calls ****************/
2777 /* There is at least some evidence that the stdio calls are interruptible
2778 just like the normal system calls, at least on some systems. In any
2779 case, it doesn't hurt to encapsulate them. */
2781 /* #### Should also encapsulate fflush().
2782 #### Should conceivably encapsulate getchar() etc. What a pain! */
2784 #ifdef ENCAPSULATE_FOPEN
2786 sys_fopen (CONST char *path, CONST char *type)
2788 PATHNAME_CONVERT_OUT (path);
2789 #if defined (WINDOWSNT)
2793 const char * type_save = type;
2795 /* Force all file handles to be non-inheritable. This is necessary to
2796 ensure child processes don't unwittingly inherit handles that might
2797 prevent future file access. */
2801 else if (type[0] == 'w' || type[0] == 'a')
2802 oflag = O_WRONLY | O_CREAT | O_TRUNC;
2806 /* Only do simplistic option parsing. */
2810 oflag &= ~(O_RDONLY | O_WRONLY);
2813 else if (type[0] == 'b')
2818 else if (type[0] == 't')
2825 fd = open (path, oflag | _O_NOINHERIT, 0644);
2829 return _fdopen (fd, type_save);
2831 #elif defined (INTERRUPTIBLE_OPEN)
2834 while (!(rtnval = fopen (path, type)) && (errno == EINTR))
2839 return fopen (path, type);
2842 #endif /* ENCAPSULATE_FOPEN */
2845 #ifdef ENCAPSULATE_FCLOSE
2847 sys_fclose (FILE *stream)
2849 #ifdef INTERRUPTIBLE_CLOSE
2852 while ((rtnval = fclose (stream)) == EOF
2853 && (errno == EINTR))
2857 return fclose (stream);
2860 #endif /* ENCAPSULATE_FCLOSE */
2863 #ifdef ENCAPSULATE_FREAD
2865 sys_fread (void *ptr, size_t size, size_t nitem, FILE *stream)
2867 #ifdef INTERRUPTIBLE_IO
2869 size_t items_read = 0;
2870 char *b = (char *) ptr;
2874 rtnval = fread (b, size, nitem, stream);
2877 if (ferror (stream) && errno == EINTR)
2884 items_read += rtnval;
2886 return (items_read);
2888 return fread (ptr, size, nitem, stream);
2891 #endif /* ENCAPSULATE_FREAD */
2894 #ifdef ENCAPSULATE_FWRITE
2896 sys_fwrite (CONST void *ptr, size_t size, size_t nitem, FILE *stream)
2898 #ifdef INTERRUPTIBLE_IO
2900 size_t items_written = 0;
2901 CONST char *b = (CONST char *) ptr;
2905 rtnval = fwrite (b, size, nitem, stream);
2908 if (ferror (stream) && errno == EINTR)
2911 return items_written;
2915 items_written += rtnval;
2917 return (items_written);
2919 return fwrite (ptr, size, nitem, stream);
2922 #endif /* ENCAPSULATE_FWRITE */
2925 /********************* directory calls *******************/
2927 #ifdef ENCAPSULATE_CHDIR
2929 sys_chdir (CONST char *path)
2931 PATHNAME_CONVERT_OUT (path);
2932 return chdir (path);
2934 #endif /* ENCAPSULATE_CHDIR */
2937 #ifdef ENCAPSULATE_MKDIR
2939 sys_mkdir (CONST char *path, mode_t mode)
2941 PATHNAME_CONVERT_OUT (path);
2943 return mkdir (path);
2945 return mkdir (path, mode);
2948 #endif /* ENCAPSULATE_MKDIR */
2951 #ifdef ENCAPSULATE_OPENDIR
2953 sys_opendir (CONST char *filename)
2956 PATHNAME_CONVERT_OUT (filename);
2958 while (!(rtnval = opendir (filename))
2959 && (errno == EINTR))
2963 #endif /* ENCAPSULATE_OPENDIR */
2966 #ifdef ENCAPSULATE_READDIR
2968 sys_readdir (DIR *dirp)
2972 /* Apparently setting errno is necessary on some systems?
2973 Maybe readdir() doesn't always set errno ?! */
2974 while (!(errno = 0, rtnval = readdir (dirp))
2975 && (errno == EINTR))
2980 if (rtnval == NULL) /* End of directory */
2983 Extcount external_len;
2984 int ascii_filename_p = 1;
2985 CONST Extbyte * CONST external_name = (CONST Extbyte *) rtnval->d_name;
2987 /* Optimize for the common all-ASCII case, computing len en passant */
2988 for (external_len = 0; external_name[external_len] ; external_len++)
2990 if (!BYTE_ASCII_P (external_name[external_len]))
2991 ascii_filename_p = 0;
2993 if (ascii_filename_p)
2996 { /* Non-ASCII filename */
2997 static Bufbyte_dynarr *internal_DIRENTRY;
2998 CONST Bufbyte *internal_name;
2999 Bytecount internal_len;
3000 if (!internal_DIRENTRY)
3001 internal_DIRENTRY = Dynarr_new (Bufbyte);
3003 Dynarr_reset (internal_DIRENTRY);
3005 Dynarr_add_many (internal_DIRENTRY, (Bufbyte *) rtnval,
3006 offsetof (DIRENTRY, d_name));
3009 convert_from_external_format (external_name, external_len,
3010 &internal_len, FORMAT_FILENAME);
3012 Dynarr_add_many (internal_DIRENTRY, internal_name, internal_len);
3013 Dynarr_add (internal_DIRENTRY, 0); /* zero-terminate */
3014 return (DIRENTRY *) Dynarr_atp (internal_DIRENTRY, 0);
3019 #endif /* ENCAPSULATE_READDIR */
3022 #ifdef ENCAPSULATE_CLOSEDIR
3024 sys_closedir (DIR *dirp)
3028 while ((rtnval = closedir (dirp)) == -1
3029 && (errno == EINTR))
3033 #endif /* ENCAPSULATE_CLOSEDIR */
3036 #ifdef ENCAPSULATE_RMDIR
3038 sys_rmdir (CONST char *path)
3040 PATHNAME_CONVERT_OUT (path);
3041 return rmdir (path);
3043 #endif /* ENCAPSULATE_RMDIR */
3046 /***************** file-information calls ******************/
3048 #ifdef ENCAPSULATE_ACCESS
3050 sys_access (CONST char *path, int mode)
3052 PATHNAME_CONVERT_OUT (path);
3053 return access (path, mode);
3055 #endif /* ENCAPSULATE_ACCESS */
3059 #ifdef ENCAPSULATE_EACCESS
3061 sys_eaccess (CONST char *path, int mode)
3063 PATHNAME_CONVERT_OUT (path);
3064 return eaccess (path, mode);
3066 #endif /* ENCAPSULATE_EACCESS */
3067 #endif /* HAVE_EACCESS */
3070 #ifdef ENCAPSULATE_LSTAT
3072 sys_lstat (CONST char *path, struct stat *buf)
3074 PATHNAME_CONVERT_OUT (path);
3075 return lstat (path, buf);
3077 #endif /* ENCAPSULATE_LSTAT */
3080 #ifdef ENCAPSULATE_READLINK
3082 sys_readlink (CONST char *path, char *buf, size_t bufsiz)
3084 PATHNAME_CONVERT_OUT (path);
3085 /* #### currently we don't do conversions on the incoming data */
3086 return readlink (path, buf, bufsiz);
3088 #endif /* ENCAPSULATE_READLINK */
3091 #ifdef ENCAPSULATE_FSTAT
3093 sys_fstat (int fd, struct stat *buf)
3095 return fstat (fd, buf);
3097 #endif /* ENCAPSULATE_FSTAT */
3100 #ifdef ENCAPSULATE_STAT
3102 sys_stat (CONST char *path, struct stat *buf)
3104 PATHNAME_CONVERT_OUT (path);
3105 return stat (path, buf);
3107 #endif /* ENCAPSULATE_STAT */
3110 /****************** file-manipulation calls *****************/
3112 #ifdef ENCAPSULATE_CHMOD
3114 sys_chmod (CONST char *path, mode_t mode)
3116 PATHNAME_CONVERT_OUT (path);
3117 return chmod (path, mode);
3119 #endif /* ENCAPSULATE_CHMOD */
3122 #ifdef ENCAPSULATE_CREAT
3124 sys_creat (CONST char *path, mode_t mode)
3126 PATHNAME_CONVERT_OUT (path);
3127 return creat (path, mode);
3129 #endif /* ENCAPSULATE_CREAT */
3132 #ifdef ENCAPSULATE_LINK
3134 sys_link (CONST char *existing, CONST char *new)
3136 PATHNAME_CONVERT_OUT (existing);
3137 PATHNAME_CONVERT_OUT (new);
3138 return link (existing, new);
3140 #endif /* ENCAPSULATE_LINK */
3143 #ifdef ENCAPSULATE_RENAME
3145 sys_rename (CONST char *old, CONST char *new)
3147 PATHNAME_CONVERT_OUT (old);
3148 PATHNAME_CONVERT_OUT (new);
3150 /* Windows rename fails if NEW exists */
3151 if (rename (old, new) == 0)
3153 if (errno != EEXIST)
3156 #endif /* WINDOWSNT */
3157 return rename (old, new);
3159 #endif /* ENCAPSULATE_RENAME */
3162 #ifdef ENCAPSULATE_SYMLINK
3164 sys_symlink (CONST char *name1, CONST char *name2)
3166 PATHNAME_CONVERT_OUT (name1);
3167 PATHNAME_CONVERT_OUT (name2);
3168 return symlink (name1, name2);
3170 #endif /* ENCAPSULATE_SYMLINK */
3173 #ifdef ENCAPSULATE_UNLINK
3175 sys_unlink (CONST char *path)
3177 PATHNAME_CONVERT_OUT (path);
3178 return unlink (path);
3180 #endif /* ENCAPSULATE_UNLINK */
3183 #ifdef ENCAPSULATE_EXECVP
3185 sys_execvp (CONST char *path, char * CONST * argv)
3190 PATHNAME_CONVERT_OUT (path);
3191 for (argc = 0; argv[argc]; argc++)
3193 new_argv = alloca_array (char *, argc + 1);
3194 for (i = 0; i < argc; i++)
3196 new_argv[i] = argv[i];
3197 PATHNAME_CONVERT_OUT (new_argv[i]);
3199 new_argv[argc] = NULL;
3200 return execvp (path, new_argv);
3202 #endif /* ENCAPSULATE_EXECVP */
3205 /************************************************************************/
3206 /* Emulations of missing system calls */
3207 /************************************************************************/
3209 /***** (these are primarily required for USG, it seems) *****/
3213 getcwd (char *pathname, int size)
3215 return getwd (pathname);
3217 #endif /* emulate getcwd */
3222 * Warning, this function may not duplicate BSD 4.2 action properly
3223 * under error conditions.
3228 getwd (char *pathname)
3230 char *npath, *spath;
3231 #if !__STDC__ && !defined(STDC_HEADERS)
3232 extern char *getcwd ();
3235 spath = npath = getcwd ((char *) 0, MAXPATHLEN);
3238 /* On Altos 3068, getcwd can return @hostname/dir, so discard
3239 up to first slash. Should be harmless on other systems. */
3240 while (*npath && *npath != '/')
3242 strcpy (pathname, npath);
3243 xfree (spath); /* getcwd uses malloc */
3246 #endif /* HAVE_GETWD */
3247 #endif /* 0 - mrb */
3250 * Emulate rename using unlink/link. Note that this is
3251 * only partially correct. Also, doesn't enforce restriction
3252 * that files be of same type (regular->regular, dir->dir, etc).
3257 rename (CONST char *from, CONST char *to)
3259 if (access (from, 0) == 0)
3262 if (link (from, to) == 0)
3263 if (unlink (from) == 0)
3268 #endif /* HAVE_RENAME */
3273 /* HPUX curses library references perror, but as far as we know
3274 it won't be called. Anyway this definition will do for now. */
3280 #endif /* not HAVE_PERROR */
3286 * Emulate BSD dup2. First close newd if it already exists.
3287 * Then, attempt to dup oldd. If not successful, call dup2 recursively
3288 * until we are, then close the unsuccessful ones.
3292 dup2 (int oldd, int newd)
3299 fd = fcntl (oldd, F_DUPFD, newd);
3301 error ("can't dup2 (%i,%i) : %s", oldd, newd, strerror (errno));
3308 ret = dup2 (old, new);
3311 #endif /* F_DUPFD */
3314 #endif /* not HAVE_DUP2 */
3317 * Gettimeofday. Simulate as much as possible. Only accurate
3318 * to nearest second. Emacs doesn't use tzp so ignore it for now.
3321 #if !defined (HAVE_GETTIMEOFDAY)
3324 gettimeofday (struct timeval *tp, struct timezone *tzp)
3326 extern long time ();
3328 tp->tv_sec = time ((long *)0);
3331 tzp->tz_minuteswest = -1;
3335 #endif /* !HAVE_GETTIMEOFDAY */
3337 /* No need to encapsulate utime and utimes explicitly because all
3338 access to those functions goes through the following. */
3341 set_file_times (char *filename, EMACS_TIME atime, EMACS_TIME mtime)
3344 struct timeval tv[2];
3347 return utimes (filename, tv);
3348 #else /* not HAVE_UTIMES */
3350 utb.actime = EMACS_SECS (atime);
3351 utb.modtime = EMACS_SECS (mtime);
3352 return utime (filename, &utb);
3353 #endif /* not HAVE_UTIMES */
3358 static long ticks_per_second;
3359 static long orig_user_ticks, orig_system_ticks;
3360 EMACS_TIME orig_real_time;
3362 static int process_times_available;
3364 /* Return the relative user and system tick count. We try to
3365 maintain calculations in terms of integers as long as possible
3366 for increased accuracy. */
3369 get_process_times_1 (long *user_ticks, long *system_ticks)
3371 #if defined (_SC_CLK_TCK) || defined (CLK_TCK) && !defined(WINDOWSNT)
3372 /* We have the POSIX times() function available. */
3375 *user_ticks = (long) tttt.tms_utime;
3376 *system_ticks = (long) tttt.tms_stime;
3378 #elif defined (CLOCKS_PER_SEC)
3379 *user_ticks = (long) clock ();
3388 init_process_times_very_early (void)
3390 #if defined (_SC_CLK_TCK)
3391 ticks_per_second = sysconf (_SC_CLK_TCK);
3392 #elif defined (CLK_TCK)
3393 ticks_per_second = CLK_TCK;
3394 #elif defined (CLOCKS_PER_SEC)
3395 ticks_per_second = CLOCKS_PER_SEC;
3398 process_times_available = get_process_times_1 (&orig_user_ticks,
3399 &orig_system_ticks);
3400 EMACS_GET_TIME (orig_real_time);
3403 /* Return the user and system times used up by this process so far. */
3405 get_process_times (double *user_time, double *system_time, double *real_time)
3407 EMACS_TIME curr_real_time;
3408 EMACS_TIME elapsed_time;
3409 long curr_user_ticks, curr_system_ticks;
3411 EMACS_GET_TIME (curr_real_time);
3412 EMACS_SUB_TIME (elapsed_time, curr_real_time, orig_real_time);
3413 *real_time = (EMACS_SECS (elapsed_time)
3414 + ((double) EMACS_USECS (elapsed_time)) / 1000000);
3415 if (get_process_times_1 (&curr_user_ticks, &curr_system_ticks))
3417 *user_time = (((double) (curr_user_ticks - orig_user_ticks))
3418 / ticks_per_second);
3419 *system_time = (((double) (curr_system_ticks - orig_system_ticks))
3420 / ticks_per_second);
3425 *user_time = *real_time;
3436 /* Figure out how many bits the system's random number generator uses.
3437 `random' and `lrand48' are assumed to return 31 usable bits.
3438 BSD `rand' returns a 31 bit value but the low order bits are unusable;
3439 so we'll shift it and treat it like the 15-bit USG `rand'. */
3443 # define RAND_BITS 31
3444 # else /* !HAVE_RANDOM */
3445 # ifdef HAVE_LRAND48
3446 # define RAND_BITS 31
3447 # define random lrand48
3448 # else /* !HAVE_LRAND48 */
3449 # define RAND_BITS 15
3450 # if RAND_MAX == 32767
3451 # define random rand
3452 # else /* RAND_MAX != 32767 */
3453 # if RAND_MAX == 2147483647
3454 # define random() (rand () >> 16)
3455 # else /* RAND_MAX != 2147483647 */
3457 # define random rand
3459 # define random() (rand () >> 16)
3461 # endif /* RAND_MAX != 2147483647 */
3462 # endif /* RAND_MAX != 32767 */
3463 # endif /* !HAVE_LRAND48 */
3464 # endif /* !HAVE_RANDOM */
3465 #endif /* !RAND_BITS */
3467 void seed_random (long arg);
3469 seed_random (long arg)
3472 srandom ((unsigned int)arg);
3474 # ifdef HAVE_LRAND48
3477 srand ((unsigned int)arg);
3483 * Build a full Emacs-sized word out of whatever we've got.
3484 * This suffices even for a 64-bit architecture with a 15-bit rand.
3486 long get_random (void);
3490 long val = random ();
3491 #if VALBITS > RAND_BITS
3492 val = (val << RAND_BITS) ^ random ();
3493 #if VALBITS > 2*RAND_BITS
3494 val = (val << RAND_BITS) ^ random ();
3495 #if VALBITS > 3*RAND_BITS
3496 val = (val << RAND_BITS) ^ random ();
3497 #if VALBITS > 4*RAND_BITS
3498 val = (val << RAND_BITS) ^ random ();
3499 #endif /* need at least 5 */
3500 #endif /* need at least 4 */
3501 #endif /* need at least 3 */
3502 #endif /* need at least 2 */
3503 return val & ((1L << VALBITS) - 1);
3507 /************************************************************************/
3508 /* Strings corresponding to defined signals */
3509 /************************************************************************/
3511 #if !defined (SYS_SIGLIST_DECLARED) && !defined (HAVE_SYS_SIGLIST)
3513 #if defined(WINDOWSNT) || defined(__CYGWIN32__)
3514 CONST char *sys_siglist[] =
3520 "illegal instruction",
3524 "floating point exception",
3527 "segmentation violation",
3528 "bad argument to system call",
3529 "write on a pipe with no one to read it",
3531 "software termination signal from kill",
3533 "sendable stop signal not from tty",
3534 "stop signal from tty",
3535 "continue a stopped process",
3536 "child status has changed",
3537 "background read attempted from control tty",
3538 "background write attempted from control tty",
3539 "input record available at control tty",
3540 "exceeded CPU time limit",
3541 "exceeded file size limit"
3547 CONST char *sys_siglist[NSIG + 1] =
3549 /* AIX has changed the signals a bit */
3550 DEFER_GETTEXT ("bogus signal"), /* 0 */
3551 DEFER_GETTEXT ("hangup"), /* 1 SIGHUP */
3552 DEFER_GETTEXT ("interrupt"), /* 2 SIGINT */
3553 DEFER_GETTEXT ("quit"), /* 3 SIGQUIT */
3554 DEFER_GETTEXT ("illegal instruction"), /* 4 SIGILL */
3555 DEFER_GETTEXT ("trace trap"), /* 5 SIGTRAP */
3556 DEFER_GETTEXT ("IOT instruction"), /* 6 SIGIOT */
3557 DEFER_GETTEXT ("crash likely"), /* 7 SIGDANGER */
3558 DEFER_GETTEXT ("floating point exception"), /* 8 SIGFPE */
3559 DEFER_GETTEXT ("kill"), /* 9 SIGKILL */
3560 DEFER_GETTEXT ("bus error"), /* 10 SIGBUS */
3561 DEFER_GETTEXT ("segmentation violation"), /* 11 SIGSEGV */
3562 DEFER_GETTEXT ("bad argument to system call"), /* 12 SIGSYS */
3563 DEFER_GETTEXT ("write on a pipe with no one to read it"), /* 13 SIGPIPE */
3564 DEFER_GETTEXT ("alarm clock"), /* 14 SIGALRM */
3565 DEFER_GETTEXT ("software termination signum"), /* 15 SIGTERM */
3566 DEFER_GETTEXT ("user defined signal 1"), /* 16 SIGUSR1 */
3567 DEFER_GETTEXT ("user defined signal 2"), /* 17 SIGUSR2 */
3568 DEFER_GETTEXT ("death of a child"), /* 18 SIGCLD */
3569 DEFER_GETTEXT ("power-fail restart"), /* 19 SIGPWR */
3570 DEFER_GETTEXT ("bogus signal"), /* 20 */
3571 DEFER_GETTEXT ("bogus signal"), /* 21 */
3572 DEFER_GETTEXT ("bogus signal"), /* 22 */
3573 DEFER_GETTEXT ("bogus signal"), /* 23 */
3574 DEFER_GETTEXT ("bogus signal"), /* 24 */
3575 DEFER_GETTEXT ("LAN I/O interrupt"), /* 25 SIGAIO */
3576 DEFER_GETTEXT ("PTY I/O interrupt"), /* 26 SIGPTY */
3577 DEFER_GETTEXT ("I/O intervention required"), /* 27 SIGIOINT */
3579 DEFER_GETTEXT ("HFT grant"), /* 28 SIGGRANT */
3580 DEFER_GETTEXT ("HFT retract"), /* 29 SIGRETRACT */
3581 DEFER_GETTEXT ("HFT sound done"), /* 30 SIGSOUND */
3582 DEFER_GETTEXT ("HFT input ready"), /* 31 SIGMSG */
3586 #else /* USG, not AIX */
3587 CONST char *sys_siglist[NSIG + 1] =
3589 DEFER_GETTEXT ("bogus signal"), /* 0 */
3590 DEFER_GETTEXT ("hangup"), /* 1 SIGHUP */
3591 DEFER_GETTEXT ("interrupt"), /* 2 SIGINT */
3592 DEFER_GETTEXT ("quit"), /* 3 SIGQUIT */
3593 DEFER_GETTEXT ("illegal instruction"), /* 4 SIGILL */
3594 DEFER_GETTEXT ("trace trap"), /* 5 SIGTRAP */
3595 DEFER_GETTEXT ("IOT instruction"), /* 6 SIGIOT */
3596 DEFER_GETTEXT ("EMT instruction"), /* 7 SIGEMT */
3597 DEFER_GETTEXT ("floating point exception"), /* 8 SIGFPE */
3598 DEFER_GETTEXT ("kill"), /* 9 SIGKILL */
3599 DEFER_GETTEXT ("bus error"), /* 10 SIGBUS */
3600 DEFER_GETTEXT ("segmentation violation"), /* 11 SIGSEGV */
3601 DEFER_GETTEXT ("bad argument to system call"), /* 12 SIGSYS */
3602 DEFER_GETTEXT ("write on a pipe with no one to read it"), /* 13 SIGPIPE */
3603 DEFER_GETTEXT ("alarm clock"), /* 14 SIGALRM */
3604 DEFER_GETTEXT ("software termination signum"), /* 15 SIGTERM */
3605 DEFER_GETTEXT ("user defined signal 1"), /* 16 SIGUSR1 */
3606 DEFER_GETTEXT ("user defined signal 2"), /* 17 SIGUSR2 */
3607 DEFER_GETTEXT ("death of a child"), /* 18 SIGCLD */
3608 DEFER_GETTEXT ("power-fail restart"), /* 19 SIGPWR */
3610 DEFER_GETTEXT ("window size changed"), /* 20 SIGWINCH */
3611 DEFER_GETTEXT ("urgent socket condition"), /* 21 SIGURG */
3612 DEFER_GETTEXT ("pollable event occurred"), /* 22 SIGPOLL */
3613 DEFER_GETTEXT ("stop (cannot be caught or ignored)"), /* 23 SIGSTOP */
3614 DEFER_GETTEXT ("user stop requested from tty"), /* 24 SIGTSTP */
3615 DEFER_GETTEXT ("stopped process has been continued"), /* 25 SIGCONT */
3616 DEFER_GETTEXT ("background tty read attempted"), /* 26 SIGTTIN */
3617 DEFER_GETTEXT ("background tty write attempted"), /* 27 SIGTTOU */
3618 DEFER_GETTEXT ("virtual timer expired"), /* 28 SIGVTALRM */
3619 DEFER_GETTEXT ("profiling timer expired"), /* 29 SIGPROF */
3620 DEFER_GETTEXT ("exceeded cpu limit"), /* 30 SIGXCPU */
3621 DEFER_GETTEXT ("exceeded file size limit"), /* 31 SIGXFSZ */
3622 DEFER_GETTEXT ("process's lwps are blocked"), /* 32 SIGWAITING */
3623 DEFER_GETTEXT ("special signal used by thread library"), /* 33 SIGLWP */
3625 DEFER_GETTEXT ("special signal used by CPR"), /* 34 SIGFREEZE */
3628 DEFER_GETTEXT ("special signal used by CPR"), /* 35 SIGTHAW */
3633 #endif /* not AIX */
3636 CONST char *sys_siglist[NSIG + 1] =
3638 DEFER_GETTEXT ("null signal"), /* 0 SIGNULL */
3639 DEFER_GETTEXT ("hangup"), /* 1 SIGHUP */
3640 DEFER_GETTEXT ("interrupt"), /* 2 SIGINT */
3641 DEFER_GETTEXT ("quit"), /* 3 SIGQUIT */
3642 DEFER_GETTEXT ("illegal instruction"), /* 4 SIGILL */
3643 DEFER_GETTEXT ("trace trap"), /* 5 SIGTRAP */
3644 DEFER_GETTEXT ("abort termination"), /* 6 SIGABRT */
3645 DEFER_GETTEXT ("SIGEMT"), /* 7 SIGEMT */
3646 DEFER_GETTEXT ("floating point exception"), /* 8 SIGFPE */
3647 DEFER_GETTEXT ("kill"), /* 9 SIGKILL */
3648 DEFER_GETTEXT ("bus error"), /* 10 SIGBUS */
3649 DEFER_GETTEXT ("segmentation violation"), /* 11 SIGSEGV */
3650 DEFER_GETTEXT ("bad argument to system call"), /* 12 SIGSYS */
3651 DEFER_GETTEXT ("write on a pipe with no reader"), /* 13 SIGPIPE */
3652 DEFER_GETTEXT ("alarm clock"), /* 14 SIGALRM */
3653 DEFER_GETTEXT ("software termination signal"), /* 15 SIGTERM */
3654 DEFER_GETTEXT ("user defined signal 1"), /* 16 SIGUSR1 */
3655 DEFER_GETTEXT ("user defined signal 2"), /* 17 SIGUSR2 */
3656 DEFER_GETTEXT ("child stopped or terminated"), /* 18 SIGCLD */
3657 DEFER_GETTEXT ("power-fail restart"), /* 19 SIGPWR */
3658 DEFER_GETTEXT ("window size changed"), /* 20 SIGWINCH */
3659 DEFER_GETTEXT ("undefined"), /* 21 */
3660 DEFER_GETTEXT ("pollable event occurred"), /* 22 SIGPOLL */
3661 DEFER_GETTEXT ("sendable stop signal not from tty"), /* 23 SIGSTOP */
3662 DEFER_GETTEXT ("stop signal from tty"), /* 24 SIGSTP */
3663 DEFER_GETTEXT ("continue a stopped process"), /* 25 SIGCONT */
3664 DEFER_GETTEXT ("attempted background tty read"), /* 26 SIGTTIN */
3665 DEFER_GETTEXT ("attempted background tty write"), /* 27 SIGTTOU */
3666 DEFER_GETTEXT ("undefined"), /* 28 */
3667 DEFER_GETTEXT ("undefined"), /* 29 */
3668 DEFER_GETTEXT ("undefined"), /* 30 */
3669 DEFER_GETTEXT ("undefined"), /* 31 */
3670 DEFER_GETTEXT ("undefined"), /* 32 */
3671 DEFER_GETTEXT ("socket (TCP/IP) urgent data arrival"), /* 33 SIGURG */
3672 DEFER_GETTEXT ("I/O is possible"), /* 34 SIGIO */
3673 DEFER_GETTEXT ("exceeded cpu time limit"), /* 35 SIGXCPU */
3674 DEFER_GETTEXT ("exceeded file size limit"), /* 36 SIGXFSZ */
3675 DEFER_GETTEXT ("virtual time alarm"), /* 37 SIGVTALRM */
3676 DEFER_GETTEXT ("profiling time alarm"), /* 38 SIGPROF */
3677 DEFER_GETTEXT ("undefined"), /* 39 */
3678 DEFER_GETTEXT ("file record locks revoked"), /* 40 SIGLOST */
3679 DEFER_GETTEXT ("undefined"), /* 41 */
3680 DEFER_GETTEXT ("undefined"), /* 42 */
3681 DEFER_GETTEXT ("undefined"), /* 43 */
3682 DEFER_GETTEXT ("undefined"), /* 44 */
3683 DEFER_GETTEXT ("undefined"), /* 45 */
3684 DEFER_GETTEXT ("undefined"), /* 46 */
3685 DEFER_GETTEXT ("undefined"), /* 47 */
3686 DEFER_GETTEXT ("undefined"), /* 48 */
3687 DEFER_GETTEXT ("undefined"), /* 49 */
3688 DEFER_GETTEXT ("undefined"), /* 50 */
3689 DEFER_GETTEXT ("undefined"), /* 51 */
3690 DEFER_GETTEXT ("undefined"), /* 52 */
3691 DEFER_GETTEXT ("undefined"), /* 53 */
3692 DEFER_GETTEXT ("undefined"), /* 54 */
3693 DEFER_GETTEXT ("undefined"), /* 55 */
3694 DEFER_GETTEXT ("undefined"), /* 56 */
3695 DEFER_GETTEXT ("undefined"), /* 57 */
3696 DEFER_GETTEXT ("undefined"), /* 58 */
3697 DEFER_GETTEXT ("undefined"), /* 59 */
3698 DEFER_GETTEXT ("undefined"), /* 60 */
3699 DEFER_GETTEXT ("undefined"), /* 61 */
3700 DEFER_GETTEXT ("undefined"), /* 62 */
3701 DEFER_GETTEXT ("undefined"), /* 63 */
3702 DEFER_GETTEXT ("notification message in mess. queue"), /* 64 SIGDGNOTIFY */
3707 #endif /* ! SYS_SIGLIST_DECLARED && ! HAVE_SYS_SIGLIST */
3710 /************************************************************************/
3711 /* Directory routines for systems that don't have them */
3712 /************************************************************************/
3714 #ifdef SYSV_SYSTEM_DIR
3718 #if defined(BROKEN_CLOSEDIR) || !defined(HAVE_CLOSEDIR)
3720 closedir (DIR *dirp) /* stream from opendir */
3724 rtnval = sys_close (dirp->dd_fd);
3726 /* Some systems (like Solaris) allocate the buffer and the DIR all
3727 in one block. Why in the world are we freeing this ourselves
3729 #if ! (defined (sun) && defined (USG5_4))
3730 xfree ((char *) dirp->dd_buf); /* directory block defined in <dirent.h> */
3732 xfree ((char *) dirp);
3735 #endif /* BROKEN_CLOSEDIR or not HAVE_CLOSEDIR */
3736 #endif /* SYSV_SYSTEM_DIR */
3738 #ifdef NONSYSTEM_DIR_LIBRARY
3741 opendir (CONST char *filename) /* name of directory */
3743 DIR *dirp; /* -> malloc'ed storage */
3744 int fd; /* file descriptor for read */
3745 struct stat sbuf; /* result of fstat */
3747 fd = sys_open (filename, O_RDONLY);
3751 if (fstat (fd, &sbuf) < 0
3752 || (sbuf.st_mode & S_IFMT) != S_IFDIR
3753 || (dirp = (DIR *) malloc (sizeof (DIR))) == 0)
3756 return 0; /* bad luck today */
3760 dirp->dd_loc = dirp->dd_size = 0; /* refill needed */
3766 closedir (DIR *dirp) /* stream from opendir */
3768 sys_close (dirp->dd_fd);
3776 ino_t od_ino; /* inode */
3777 char od_name[DIRSIZ]; /* filename */
3780 static struct direct dir_static; /* simulated directory contents */
3784 readdir (DIR *dirp) /* stream from opendir */
3786 struct olddir *dp; /* -> directory data */
3790 if (dirp->dd_loc >= dirp->dd_size)
3791 dirp->dd_loc = dirp->dd_size = 0;
3793 if (dirp->dd_size == 0 /* refill buffer */
3794 && (dirp->dd_size = sys_read (dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ)) <= 0)
3797 dp = (struct olddir *) &dirp->dd_buf[dirp->dd_loc];
3798 dirp->dd_loc += sizeof (struct olddir);
3800 if (dp->od_ino != 0) /* not deleted entry */
3802 dir_static.d_ino = dp->od_ino;
3803 strncpy (dir_static.d_name, dp->od_name, DIRSIZ);
3804 dir_static.d_name[DIRSIZ] = '\0';
3805 dir_static.d_namlen = strlen (dir_static.d_name);
3806 dir_static.d_reclen = sizeof (struct direct)
3808 + dir_static.d_namlen - dir_static.d_namlen % 4;
3809 return &dir_static; /* -> simulated structure */
3815 #endif /* NONSYSTEM_DIR_LIBRARY */
3818 /* mkdir and rmdir functions, for systems which don't have them. */
3822 * Written by Robert Rother, Mariah Corporation, August 1985.
3824 * If you want it, it's yours. All I ask in return is that if you
3825 * figure out how to do this in a Bourne Shell script you send me
3827 * sdcsvax!rmr or rmr@uscd
3829 * Severely hacked over by John Gilmore to make a 4.2BSD compatible
3830 * subroutine. 11Mar86; hoptoad!gnu
3832 * Modified by rmtodd@uokmax 6-28-87 -- when making an already existing dir,
3833 * subroutine didn't return EEXIST. It does now.
3839 #ifdef MKDIR_PROTOTYPE
3843 mkdir (CONST char *dpath, int dmode)
3846 int cpid, status, fd;
3847 struct stat statbuf;
3849 if (stat (dpath, &statbuf) == 0)
3851 errno = EEXIST; /* Stat worked, so it already exists */
3855 /* If stat fails for a reason other than non-existence, return error */
3856 if (errno != ENOENT)
3859 synch_process_alive = 1;
3860 switch (cpid = fork ())
3863 case -1: /* Error in fork() */
3864 return -1; /* Errno is set already */
3866 case 0: /* Child process */
3869 * Cheap hack to set mode of new directory. Since this
3870 * child process is going away anyway, we zap its umask.
3871 * ####, this won't suffice to set SUID, SGID, etc. on this
3872 * directory. Does anybody care?
3874 status = umask (0); /* Get current umask */
3875 status = umask (status | (0777 & ~dmode)); /* Set for mkdir */
3876 fd = sys_open ("/dev/null", O_RDWR);
3879 if (fd != STDIN_FILENO) dup2 (fd, STDIN_FILENO);
3880 if (fd != STDOUT_FILENO) dup2 (fd, STDOUT_FILENO);
3881 if (fd != STDERR_FILENO) dup2 (fd, STDERR_FILENO);
3883 execl ("/bin/mkdir", "mkdir", dpath, (char *) 0);
3884 _exit (-1); /* Can't exec /bin/mkdir */
3887 default: /* Parent process */
3888 wait_for_termination (cpid);
3891 if (synch_process_death != 0 || synch_process_retcode != 0)
3893 errno = EIO; /* We don't know why, but */
3894 return -1; /* /bin/mkdir failed */
3899 #endif /* not HAVE_MKDIR */
3903 rmdir (CONST char *dpath)
3905 int cpid, status, fd;
3906 struct stat statbuf;
3908 if (stat (dpath, &statbuf) != 0)
3910 /* Stat just set errno. We don't have to */
3914 synch_process_alive = 1;
3915 switch (cpid = fork ())
3918 case -1: /* Error in fork() */
3919 return (-1); /* Errno is set already */
3921 case 0: /* Child process */
3922 fd = sys_open("/dev/null", O_RDWR);
3925 if (fd != STDIN_FILENO) dup2 (fd, STDIN_FILENO);
3926 if (fd != STDOUT_FILENO) dup2 (fd, STDOUT_FILENO);
3927 if (fd != STDERR_FILENO) dup2 (fd, STDERR_FILENO);
3929 execl ("/bin/rmdir", "rmdir", dpath, (char *) 0);
3930 _exit (-1); /* Can't exec /bin/mkdir */
3932 default: /* Parent process */
3933 wait_for_termination (cpid);
3936 if (synch_process_death != 0 ||
3937 synch_process_retcode != 0)
3939 errno = EIO; /* We don't know why, but */
3940 return -1; /* /bin/rmdir failed */
3945 #endif /* !HAVE_RMDIR */
3948 /************************************************************************/
3949 /* Misc. SunOS crap */
3950 /************************************************************************/
3954 /* These are included on Sunos 4.1 when we do not use shared libraries.
3955 X11 libraries may refer to these functions but (we hope) do not
3956 actually call them. */
3976 #endif /* USE_DL_STUBS */
3980 #ifndef HAVE_STRCASECMP
3984 static unsigned char charmap[] = {
3985 '\000', '\001', '\002', '\003', '\004', '\005', '\006', '\007',
3986 '\010', '\011', '\012', '\013', '\014', '\015', '\016', '\017',
3987 '\020', '\021', '\022', '\023', '\024', '\025', '\026', '\027',
3988 '\030', '\031', '\032', '\033', '\034', '\035', '\036', '\037',
3989 '\040', '\041', '\042', '\043', '\044', '\045', '\046', '\047',
3990 '\050', '\051', '\052', '\053', '\054', '\055', '\056', '\057',
3991 '\060', '\061', '\062', '\063', '\064', '\065', '\066', '\067',
3992 '\070', '\071', '\072', '\073', '\074', '\075', '\076', '\077',
3993 '\100', '\141', '\142', '\143', '\144', '\145', '\146', '\147',
3994 '\150', '\151', '\152', '\153', '\154', '\155', '\156', '\157',
3995 '\160', '\161', '\162', '\163', '\164', '\165', '\166', '\167',
3996 '\170', '\171', '\172', '\133', '\134', '\135', '\136', '\137',
3997 '\140', '\141', '\142', '\143', '\144', '\145', '\146', '\147',
3998 '\150', '\151', '\152', '\153', '\154', '\155', '\156', '\157',
3999 '\160', '\161', '\162', '\163', '\164', '\165', '\166', '\167',
4000 '\170', '\171', '\172', '\173', '\174', '\175', '\176', '\177',
4001 '\200', '\201', '\202', '\203', '\204', '\205', '\206', '\207',
4002 '\210', '\211', '\212', '\213', '\214', '\215', '\216', '\217',
4003 '\220', '\221', '\222', '\223', '\224', '\225', '\226', '\227',
4004 '\230', '\231', '\232', '\233', '\234', '\235', '\236', '\237',
4005 '\240', '\241', '\242', '\243', '\244', '\245', '\246', '\247',
4006 '\250', '\251', '\252', '\253', '\254', '\255', '\256', '\257',
4007 '\260', '\261', '\262', '\263', '\264', '\265', '\266', '\267',
4008 '\270', '\271', '\272', '\273', '\274', '\275', '\276', '\277',
4009 '\300', '\301', '\302', '\303', '\304', '\305', '\306', '\307',
4010 '\310', '\311', '\312', '\313', '\314', '\315', '\316', '\317',
4011 '\320', '\321', '\322', '\323', '\324', '\325', '\326', '\327',
4012 '\330', '\331', '\332', '\333', '\334', '\335', '\336', '\337',
4013 '\340', '\341', '\342', '\343', '\344', '\345', '\346', '\347',
4014 '\350', '\351', '\352', '\353', '\354', '\355', '\356', '\357',
4015 '\360', '\361', '\362', '\363', '\364', '\365', '\366', '\367',
4016 '\370', '\371', '\372', '\373', '\374', '\375', '\376', '\377',
4020 strcasecmp (char *s1, char *s2)
4022 unsigned char *cm = charmap;
4023 unsigned char *us1 = (unsigned char *) s1;
4024 unsigned char *us2 = (unsigned char *)s2;
4026 while (cm[*us1] == cm[*us2++])
4030 return (cm[*us1] - cm[*--us2]);
4032 #endif /* !HAVE_STRCASECMP */