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 #include <mingw32/process.h>
39 /* <process.h> should not conflict with "process.h", as per ANSI definition.
40 This is not true with visual c though. The trick below works with
41 VC4.2b, 5.0 and 6.0. It assumes that VC is installed in a kind of
42 standard way, so include path ends with /include.
44 Unfortunately, this must go before lisp.h, since process.h defines abort()
45 which will conflict with the macro defined in lisp.h
47 #include <../include/process.h>
48 #endif /* __MINGW32__ */
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>
96 /* ------------------------------- */
98 /* ------------------------------- */
101 #include <sys/utsname.h>
102 #if defined (TIOCGWINSZ) || defined (ISC4_0)
104 #include <sys/sioctl.h>
107 #include <sys/stream.h>
108 #include <sys/ptem.h>
110 #endif /* TIOCGWINSZ or ISC4_0 */
113 #ifdef HAVE_SYS_STROPTS_H
114 #include <sys/stropts.h>
115 #endif /* HAVE_SYS_STROPTS_H */
117 /* LPASS8 is new in 4.3, and makes cbreak mode provide all 8 bits. */
128 static int baud_convert[] =
133 0, 50, 75, 110, 135, 150, 200, 300, 600, 1200,
134 1800, 2400, 4800, 9600, 19200, 38400
141 static void hft_init (struct console *c);
142 static void hft_reset (struct console *c);
143 #include <sys/termio.h>
146 /* ------------------------------- */
148 /* ------------------------------- */
151 #ifndef HAVE_STRUCT_UTIMBUF
152 /* We want to use utime rather than utimes, but we couldn't find the
153 structure declaration. We'll use the traditional one. */
163 /************************************************************************/
164 /* subprocess control */
165 /************************************************************************/
171 /* Arrange for character C to be read as the next input from
174 stuff_char (struct console *con, int c)
178 assert (CONSOLE_TTY_P (con));
179 input_fd = CONSOLE_TTY_DATA (con)->infd;
180 /* Should perhaps error if in batch mode */
182 ioctl (input_fd, TIOCSTI, &c);
183 #else /* no TIOCSTI */
184 error ("Cannot stuff terminal input characters in this version of Unix.");
185 #endif /* no TIOCSTI */
190 #endif /* HAVE_TTY */
193 set_exclusive_use (int fd)
196 ioctl (fd, FIOCLEX, 0);
198 /* Ok to do nothing if this feature does not exist */
202 set_descriptor_non_blocking (int fd)
204 /* Stride people say it's a mystery why this is needed
205 as well as the O_NDELAY, but that it fails without this. */
206 /* For AIX: Apparently need this for non-blocking reads on sockets.
207 It seems that O_NONBLOCK applies only to FIFOs? From
208 lowry@watson.ibm.com (Andy Lowry). */
209 /* #### Should this be conditionalized on FIONBIO? */
210 #if defined (STRIDE) || (defined (pfa) && defined (HAVE_PTYS)) || defined (AIX)
213 ioctl (fd, FIONBIO, &one);
218 fcntl (fd, F_SETFL, O_NONBLOCK);
222 #if defined (NO_SUBPROCESSES)
226 wait_without_blocking (void)
228 wait3 (0, WNOHANG | WUNTRACED, 0);
229 synch_process_alive = 0;
233 #endif /* NO_SUBPROCESSES */
237 void wait_for_termination (HANDLE pHandle)
239 void wait_for_termination (int pid)
242 /* #### With the new improved SIGCHLD handling stuff, there is much
243 less danger of race conditions and some of the comments below
244 don't apply. This should be updated. */
246 #if defined (NO_SUBPROCESSES)
249 /* No need to be tricky like below; we can just call wait(). */
250 /* #### should figure out how to write a wait_allowing_quit().
251 Since hardly any systems don't have subprocess support,
252 however, there doesn't seem to be much point. */
256 #elif defined (HAVE_WAITPID)
257 /* Note that, whenever any subprocess terminates (asynch. or synch.),
258 the SIGCHLD handler will be called and it will call wait(). Thus
259 we cannot just call wait() ourselves, and we can't block SIGCHLD
260 and then call wait(), because then if an asynch. process dies
261 while we're waiting for our synch. process, Emacs will never
262 notice that the asynch. process died.
264 So, the general approach we take is to repeatedly block until a
265 signal arrives, and then check if our process died using kill
266 (pid, 0). (We could also check the value of `synch_process_alive',
267 since the SIGCHLD handler will reset that and we know that we're
268 only being called on synchronous processes, but this approach is
269 safer. I don't trust the proper delivery of SIGCHLD.
271 Note also that we cannot use any form of waitpid(). A loop with
272 WNOHANG will chew up CPU time; better to use sleep(). A loop
273 without WNOWAIT will screw up the SIGCHLD handler (actually this
274 is not true, if you duplicate the exit-status-reaping code; see
275 below). A loop with WNOWAIT will result in a race condition if
276 the process terminates between the process-status check and the
277 call to waitpid(). */
279 /* Formerly, immediate_quit was set around this function call, but
280 that could lead to problems if the QUIT happened when SIGCHLD was
281 blocked -- it would remain blocked. Yet another reason why
282 immediate_quit is a bad idea. In any case, there is no reason to
283 resort to this because either the SIGIO or the SIGALRM will stop
284 the block in EMACS_WAIT_FOR_SIGNAL(). */
286 /* Apparently there are bugs on some systems with the second method
287 used below (the EMACS_BLOCK_SIGNAL method), whereby zombie
288 processes get left around. It appears in those cases that the
289 SIGCHLD handler is never getting invoked. It's not clear whether
290 this is an Emacs bug or a kernel bug or both: on HPUX this
291 problem is observed only with XEmacs, but under Solaris 2.4 all
292 sorts of different programs have problems with zombies. The
293 method we use here does not require a working SIGCHLD (but will
294 not break if it is working), and should be safe. */
296 We use waitpid(), contrary to the remarks above. There is no
297 race condition, because the three situations when sigchld_handler
298 is invoked should be handled OK:
300 - handler invoked before waitpid(): In this case, subprocess
301 status will be set by sigchld_handler. waitpid() here will
302 return -1 with errno set to ECHILD, which is a valid exit
305 - handler invoked during waitpid(): as above, except that errno
306 here will be set to EINTR. This will cause waitpid() to be
307 called again, and this time it will exit with ECHILD.
309 - handler invoked after waitpid(): The following code will reap
310 the subprocess. In the handler, wait() will return -1 because
311 there is no child to reap, and the handler will exit without
312 modifying child subprocess status. */
315 /* Because the SIGCHLD handler can potentially reap the synchronous
316 subprocess, we should take care of that. */
318 /* Will stay in the do loop as long as:
320 2. Ctrl-G is not pressed */
324 ret = waitpid (pid, &status, 0);
325 /* waitpid returns 0 if the process is still alive. */
327 while (ret == 0 || (ret == -1 && errno == EINTR));
329 if (ret == pid) /* Success */
330 /* Set synch process globals. This is can also happen
331 in sigchld_handler, and that code is duplicated. */
333 synch_process_alive = 0;
334 if (WIFEXITED (status))
335 synch_process_retcode = WEXITSTATUS (status);
336 else if (WIFSIGNALED (status))
337 synch_process_death = signal_name (WTERMSIG (status));
339 /* On exiting the loop, ret will be -1, with errno set to ECHILD if
340 the child has already been reaped, e.g. in the signal handler. */
342 /* Otherwise, we've had some error condition here.
343 Per POSIX, the only other possibilities are:
344 - EFAULT (bus error accessing arg 2) or
345 - EINVAL (incorrect arguments),
346 which are both program bugs.
348 Since implementations may add their own error indicators on top,
349 we ignore it by default. */
350 #elif defined (WINDOWSNT)
351 int ret = 0, status = 0;
354 warn_when_safe (Qprocess, Qwarning, "Cannot wait for unknown process to terminate");
360 ret = WaitForSingleObject(pHandle, 100);
362 while (ret == WAIT_TIMEOUT);
363 if (ret == WAIT_FAILED)
365 warn_when_safe (Qprocess, Qwarning, "waiting for process failed");
367 if (ret == WAIT_ABANDONED)
369 warn_when_safe (Qprocess, Qwarning,
370 "process to wait for has been abandoned");
372 if (ret == WAIT_OBJECT_0)
374 ret = GetExitCodeProcess(pHandle, &status);
377 synch_process_alive = 0;
378 synch_process_retcode = status;
382 /* GetExitCodeProcess() didn't return a valid exit status,
383 nothing to do. APA */
384 warn_when_safe (Qprocess, Qwarning,
385 "failure to obtain process exit value");
388 if (pHandle != NULL && !CloseHandle(pHandle))
390 warn_when_safe (Qprocess, Qwarning,
391 "failure to close unknown process");
393 #elif defined (EMACS_BLOCK_SIGNAL) && !defined (BROKEN_WAIT_FOR_SIGNAL) && defined (SIGCHLD)
396 static int wait_debugging = 0; /* Set nonzero to make following
397 function work under dbx (at least for bsd). */
402 EMACS_BLOCK_SIGNAL (SIGCHLD);
403 /* Block SIGCHLD from happening during this check,
404 to avoid race conditions. */
405 if (kill (pid, 0) < 0)
407 EMACS_UNBLOCK_SIGNAL (SIGCHLD);
411 /* WARNING: Whatever this macro does *must* not allow SIGCHLD
412 to happen between the time that it's reenabled and when we
413 begin to block. Otherwise we may end up blocking for a
414 signal that has already arrived and isn't coming again.
415 Can you say "race condition"?
417 I assume that the system calls sigpause() or sigsuspend()
418 to provide this atomicness. If you're getting hangs in
419 sigpause()/sigsuspend(), then your OS doesn't implement
420 this properly (this applies under hpux9, for example).
421 Try defining BROKEN_WAIT_FOR_SIGNAL. */
422 EMACS_WAIT_FOR_SIGNAL (SIGCHLD);
424 #else /* not HAVE_WAITPID and not WINDOWSNT and (not EMACS_BLOCK_SIGNAL or BROKEN_WAIT_FOR_SIGNAL) */
425 /* This approach is kind of cheesy but is guaranteed(?!) to work
430 if (kill (pid, 0) < 0)
434 #endif /* OS features */
438 #if !defined (NO_SUBPROCESSES)
441 * flush any pending output
442 * (may flush input as well; it does not matter the way we use it)
446 flush_pending_output (int channel)
449 /* If we try this, we get hit with SIGTTIN, because
450 the child's tty belongs to the child's pgrp. */
451 #elif defined (TCFLSH)
452 ioctl (channel, TCFLSH, 1);
453 #elif defined (TIOCFLUSH)
455 /* 3rd arg should be ignored
456 but some 4.2 kernels actually want the address of an int
457 and nonzero means something different. */
458 ioctl (channel, TIOCFLUSH, &zero);
463 /* Set up the terminal at the other end of a pseudo-terminal that
464 we will be controlling an inferior through.
465 It should not echo or do line-editing, since that is done
466 in Emacs. No padding needed for insertion into an Emacs buffer. */
469 child_setup_tty (int out)
472 emacs_get_tty (out, &s);
474 #if defined (HAVE_TERMIO) || defined (HAVE_TERMIOS)
475 assert (isatty(out));
476 s.main.c_oflag |= OPOST; /* Enable output postprocessing */
477 s.main.c_oflag &= ~ONLCR; /* Disable map of NL to CR-NL on output */
479 s.main.c_oflag &= ~(NLDLY|CRDLY|TABDLY|BSDLY|VTDLY|FFDLY);
480 /* No output delays */
482 s.main.c_lflag &= ~ECHO; /* Disable echo */
483 s.main.c_lflag |= ISIG; /* Enable signals */
485 s.main.c_iflag &= ~IUCLC; /* Disable downcasing on input. */
488 s.main.c_oflag &= ~OLCUC; /* Disable upcasing on output. */
490 s.main.c_oflag &= ~TAB3; /* Disable tab expansion */
491 #if defined (CSIZE) && defined (CS8)
492 s.main.c_cflag = (s.main.c_cflag & ~CSIZE) | CS8; /* Don't strip 8th bit */
495 s.main.c_iflag &= ~ISTRIP; /* Don't strip 8th bit on input */
498 /* Unnecessary as long as ICANON is set */
499 s.main.c_cc[VMIN] = 1; /* minimum number of characters to accept */
500 s.main.c_cc[VTIME] = 0; /* wait forever for at least 1 character */
503 s.main.c_lflag |= ICANON; /* Enable erase/kill and eof processing */
504 s.main.c_cc[VEOF] = 04; /* ensure that EOF is Control-D */
505 s.main.c_cc[VERASE] = _POSIX_VDISABLE; /* disable erase processing */
506 s.main.c_cc[VKILL] = _POSIX_VDISABLE; /* disable kill processing */
509 s.main.c_cflag = (s.main.c_cflag & ~CBAUD) | B9600; /* baud rate sanity */
514 /* AIX enhanced edit loses NULs, so disable it. */
516 s.main.c_iflag &= ~ASCEDIT;
517 #endif /* IBMR2AIX */
518 /* Also, PTY overloads NUL and BREAK.
519 don't ignore break, but don't signal either, so it looks like NUL.
520 This really serves a purpose only if running in an XTERM window
521 or via TELNET or the like, but does no harm elsewhere. */
522 s.main.c_iflag &= ~IGNBRK;
523 s.main.c_iflag &= ~BRKINT;
525 #ifdef SIGNALS_VIA_CHARACTERS
526 /* TTY `special characters' are used in process_send_signal
527 so set them here to something useful. */
528 s.main.c_cc[VQUIT] = '\\'&037; /* Control-\ */
529 s.main.c_cc[VINTR] = 'C' &037; /* Control-C */
530 s.main.c_cc[VSUSP] = 'Z' &037; /* Control-Z */
531 #else /* no TIOCGPGRP or no TIOCGLTC or no TIOCGETC */
532 /* TTY `special characters' work better as signals, so disable
534 s.main.c_cc[VQUIT] = _POSIX_VDISABLE;
535 s.main.c_cc[VINTR] = _POSIX_VDISABLE;
536 s.main.c_cc[VSUSP] = _POSIX_VDISABLE;
537 s.main.c_lflag &= ~ISIG;
538 #endif /* no TIOCGPGRP or no TIOCGLTC or no TIOCGETC */
539 s.main.c_cc[VEOL] = _POSIX_VDISABLE;
541 /* <mdiers> #### This is not portable. ###
542 POSIX does not specify CBAUD, and 4.4BSD does not have it.
543 Instead, POSIX suggests to use cfset{i,o}speed().
544 [cf. D. Lewine, POSIX Programmer's Guide, Chapter 8: Terminal
545 I/O, O'Reilly 1991] */
546 s.main.c_cflag = (s.main.c_cflag & ~CBAUD) | B9600; /* baud rate sanity */
548 /* <mdiers> What to do upon failure? Just ignoring rc is probably
549 not acceptable, is it? */
550 if (cfsetispeed (&s.main, B9600) == -1) /* ignore */;
551 if (cfsetospeed (&s.main, B9600) == -1) /* ignore */;
552 #endif /* defined (CBAUD) */
554 #else /* not HAVE_TERMIO */
556 s.main.sg_flags &= ~(ECHO | CRMOD | ANYP | ALLDELAY | RAW | LCASE
558 s.main.sg_flags |= LPASS8;
559 s.main.sg_erase = 0377;
560 s.main.sg_kill = 0377;
561 s.lmode = LLITOUT | s.lmode; /* Don't strip 8th bit */
563 #endif /* not HAVE_TERMIO */
564 emacs_set_tty (out, &s, 0);
569 ioctl (out, FIOASYNC, &zero);
573 #endif /* WINDOWSNT */
575 #endif /* not NO_SUBPROCESSES */
578 #if !defined (SIGTSTP) && !defined (USG_JOBCTRL)
580 #if defined(__STDC__) || defined(_MSC_VER)
581 #define SIG_PARAM_TYPE int
583 #define SIG_PARAM_TYPE
586 /* Record a signal code and the handler for it. */
590 SIGTYPE (*handler) (SIG_PARAM_TYPE);
594 save_signal_handlers (struct save_signal *saved_handlers)
596 while (saved_handlers->code)
598 saved_handlers->handler
599 = (SIGTYPE (*) (SIG_PARAM_TYPE)) signal (saved_handlers->code, SIG_IGN);
605 restore_signal_handlers (struct save_signal *saved_handlers)
607 while (saved_handlers->code)
609 signal (saved_handlers->code, saved_handlers->handler);
618 return abs (getpid ());
620 #endif /* WINDOWSNT */
622 /* Fork a subshell. */
631 struct save_signal saved_handlers[5];
633 unsigned char *str = 0;
637 saved_handlers[0].code = SIGINT;
638 saved_handlers[1].code = SIGQUIT;
639 saved_handlers[2].code = SIGTERM;
641 saved_handlers[3].code = SIGIO;
642 saved_handlers[4].code = 0;
644 saved_handlers[3].code = 0;
647 /* Mentioning current_buffer->buffer would mean including buffer.h,
648 which somehow wedges the hp compiler. So instead... */
650 if (NILP (Fboundp (Qdefault_directory)))
652 dir = Fsymbol_value (Qdefault_directory);
657 dir = Funhandled_file_name_directory (dir);
658 dir = expand_and_dir_to_file (dir, Qnil);
660 str = (unsigned char *) alloca (XSTRING_LENGTH (dir) + 2);
661 len = XSTRING_LENGTH (dir);
662 memcpy (str, XSTRING_DATA (dir), len);
663 /* #### Unix specific */
664 if (str[len - 1] != '/') str[len++] = '/';
670 #else /* not WINDOWSNT */
675 error ("Can't spawn subshell");
678 #endif /* not WINDOWSNT */
683 sh = (char *) egetenv ("SHELL");
687 /* Use our buffer's default directory for the subshell. */
691 #if !defined (NO_SUBPROCESSES) && !defined (WINDOWSNT)
692 close_process_descs (); /* Close Emacs's pipes/ptys */
695 #ifdef SET_EMACS_PRIORITY
696 if (emacs_priority != 0)
697 nice (-emacs_priority); /* Give the new shell the default priority */
701 /* Waits for process completion */
702 pid = _spawnlp (_P_WAIT, sh, sh, NULL);
704 write (1, "Can't execute subshell", 22);
706 #else /* not WINDOWSNT */
708 write (1, "Can't execute subshell", 22);
710 #endif /* not WINDOWSNT */
713 save_signal_handlers (saved_handlers);
714 synch_process_alive = 1;
715 wait_for_termination (pid);
716 restore_signal_handlers (saved_handlers);
719 #endif /* !defined (SIGTSTP) && !defined (USG_JOBCTRL) */
723 /* Suspend the Emacs process; give terminal to its superior. */
727 #if defined (SIGTSTP)
729 int pgrp = EMACS_GET_PROCESS_GROUP ();
730 EMACS_KILLPG (pgrp, SIGTSTP);
733 #elif defined (USG_JOBCTRL)
734 /* If you don't know what this is don't mess with it */
735 ptrace (0, 0, 0, 0); /* set for ptrace - caught by csh */
736 kill (getpid (), SIGQUIT);
738 #else /* No SIGTSTP or USG_JOBCTRL */
740 /* On a system where suspending is not implemented,
741 instead fork a subshell and let it talk directly to the terminal
748 /* Suspend a process if possible; give terminal to its superior. */
750 sys_suspend_process (int process)
752 /* I don't doubt that it is possible to suspend processes on
753 * VMS machines or thost that use USG_JOBCTRL,
754 * but I don't know how to do it, so...
756 #if defined (SIGTSTP)
757 kill(process, SIGTSTP);
762 /* Given FD, obtain pty buffer size. When no luck, a good guess is made,
763 so that the function works even fd is not a pty. */
766 get_pty_max_bytes (int fd)
770 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
771 pty_max_bytes = fpathconf (fd, _PC_MAX_CANON);
772 if (pty_max_bytes < 0)
776 /* Deduct one, to leave space for the eof. */
779 return pty_max_bytes;
782 /* Figure out the eof character for the FD. */
785 get_eof_char (int fd)
787 const Bufbyte ctrl_d = (Bufbyte) '\004';
796 /* What is the following line designed to do??? -mrb */
797 if (strlen ((const char *) t.c_cc) < (unsigned int) (VEOF + 1))
800 return (Bufbyte) t.c_cc[VEOF];
802 return t.c_cc[VEOF] == _POSIX_VDISABLE ? ctrl_d : (Bufbyte) t.c_cc[VEOF];
804 #else /* ! HAVE_TERMIOS */
805 /* On Berkeley descendants, the following IOCTL's retrieve the
806 current control characters. */
807 #if defined (TIOCGETC)
810 ioctl (fd, TIOCGETC, &c);
811 return (Bufbyte) c.t_eofc;
813 #else /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
814 /* On SYSV descendants, the TCGETA ioctl retrieves the current control
819 ioctl (fd, TCGETA, &t);
820 if (strlen ((const char *) t.c_cc) < (unsigned int) (VINTR + 1))
823 return (Bufbyte) t.c_cc[VINTR];
825 #else /* ! defined (TCGETA) */
826 /* Rather than complain, we'll just guess ^D, which is what
827 * earlier emacsen always used. */
829 #endif /* ! defined (TCGETA) */
830 #endif /* ! defined (TIOCGETC) */
831 #endif /* ! defined (HAVE_TERMIOS) */
834 /* Set the logical window size associated with descriptor FD
835 to HEIGHT and WIDTH. This is used mainly with ptys. */
838 set_window_size (int fd, int height, int width)
844 size.ws_row = height;
847 if (ioctl (fd, TIOCSWINSZ, &size) == -1)
848 return 0; /* error */
852 #elif defined (TIOCSSIZE)
856 size.ts_lines = height;
857 size.ts_cols = width;
859 if (ioctl (fd, TIOCGSIZE, &size) == -1)
870 /* Set up the proper status flags for use of a pty. */
875 /* I'm told that TOICREMOTE does not mean control chars
876 "can't be sent" but rather that they don't have
877 input-editing or signaling effects.
878 That should be good, because we have other ways
879 to do those things in Emacs.
880 However, telnet mode seems not to work on 4.2.
881 So TIOCREMOTE is turned off now. */
883 /* Under hp-ux, if TIOCREMOTE is turned on, some calls
884 will hang. In particular, the "timeout" feature (which
885 causes a read to return if there is no data available)
886 does this. Also it is known that telnet mode will hang
887 in such a way that Emacs must be stopped (perhaps this
888 is the same problem).
890 If TIOCREMOTE is turned off, then there is a bug in
891 hp-ux which sometimes loses data. Apparently the
892 code which blocks the master process when the internal
893 buffer fills up does not work. Other than this,
894 though, everything else seems to work fine.
896 Since the latter lossage is more benign, we may as well
897 lose that way. -- cph */
898 #if defined (FIONBIO) && defined (SYSV_PTYS)
901 ioctl (fd, FIONBIO, &on);
905 /* On AIX, the parent gets SIGHUP when a pty attached child dies. So, we */
906 /* ignore SIGHUP once we've started a child on a pty. Note that this may */
907 /* cause EMACS not to die when it should, i.e., when its own controlling */
908 /* tty goes away. I've complained to the AIX developers, and they may */
909 /* change this behavior, but I'm not going to hold my breath. */
910 signal (SIGHUP, SIG_IGN);
913 /* In some systems (Linux through 2.0.0, at least), packet mode doesn't
914 get cleared when a pty is closed, so we need to clear it here.
915 Linux pre2.0.13 contained an attempted fix for this (from Ted Ts'o,
916 tytso@mit.edu), but apparently it messed up rlogind and telnetd, so he
917 removed the fix in pre2.0.14. - dkindred@cs.cmu.edu
921 ioctl (fd, TIOCPKT, (char *)&off);
925 #endif /* HAVE_PTYS */
928 /************************************************************************/
930 /************************************************************************/
932 /* ------------------------------------------------------ */
934 /* ------------------------------------------------------ */
936 /* It really makes more sense for the baud-rate to be console-specific
937 and not device-specific, but it's (at least potentially) used for output
941 init_baud_rate (struct device *d)
943 struct console *con = XCONSOLE (DEVICE_CONSOLE (d));
944 if (DEVICE_WIN_P (d) || DEVICE_STREAM_P (d))
946 DEVICE_BAUD_RATE (d) = 38400;
951 assert (DEVICE_TTY_P (d));
953 int input_fd = CONSOLE_TTY_DATA (con)->infd;
954 #if defined (WINDOWSNT)
955 DEVICE_TTY_DATA (d)->ospeed = 15;
956 #elif defined (HAVE_TERMIOS)
960 tcgetattr (input_fd, &sg);
961 DEVICE_TTY_DATA (d)->ospeed = cfgetospeed (&sg);
962 # if defined (USE_GETOBAUD) && defined (getobaud)
963 /* m88k-motorola-sysv3 needs this (ghazi@noc.rutgers.edu) 9/1/94. */
964 if (DEVICE_TTY_DATA (d)->ospeed == 0)
965 DEVICE_TTY_DATA (d)->ospeed = getobaud (sg.c_cflag);
967 #elif defined (HAVE_TERMIO)
972 tcgetattr (input_fd, &sg);
974 ioctl (input_fd, TCGETA, &sg);
976 DEVICE_TTY_DATA (d)->ospeed = sg.c_cflag & CBAUD;
977 #else /* neither TERMIOS nor TERMIO */
980 sg.sg_ospeed = B9600;
981 if (ioctl (input_fd, TIOCGETP, &sg) < 0)
983 DEVICE_TTY_DATA (d)->ospeed = sg.sg_ospeed;
987 DEVICE_BAUD_RATE (d) =
988 (DEVICE_TTY_DATA (d)->ospeed < countof (baud_convert)
989 ? baud_convert[DEVICE_TTY_DATA (d)->ospeed]
992 if (DEVICE_BAUD_RATE (d) == 0)
993 DEVICE_BAUD_RATE (d) = 1200;
994 #endif /* HAVE_TTY */
998 /* ------------------------------------------------------ */
1000 /* ------------------------------------------------------ */
1002 #if defined(SIGIO) && !defined(BROKEN_SIGIO)
1005 init_sigio_on_device (struct device *d)
1007 int filedesc = DEVICE_INFD (d);
1009 #if defined (FIOSSAIOOWN)
1011 int owner = getpid ();
1013 if (DEVICE_TTY_P (d))
1015 ioctl_status = ioctl (filedesc, FIOGSAIOOWN,
1016 &DEVICE_OLD_FCNTL_OWNER (d));
1017 ioctl_status = ioctl (filedesc, FIOSSAIOOWN, &owner);
1019 #ifdef HAVE_WINDOW_SYSTEM
1020 else if (!DEVICE_STREAM_P (d))
1022 ioctl_status = ioctl (filedesc, SIOCGPGRP,
1023 &DEVICE_OLD_FCNTL_OWNER (d));
1024 ioctl_status = ioctl (filedesc, SIOCSPGRP, &owner);
1028 #elif defined (F_SETOWN) && !defined (F_SETOWN_BUG)
1029 DEVICE_OLD_FCNTL_OWNER (d) = fcntl (filedesc, F_GETOWN, 0);
1030 # ifdef F_SETOWN_SOCK_NEG
1031 /* stdin is a socket here */
1032 fcntl (filedesc, F_SETOWN, -getpid ());
1034 fcntl (filedesc, F_SETOWN, getpid ());
1040 reset_sigio_on_device (struct device *d)
1042 int filedesc = DEVICE_INFD (d);
1044 #if defined (FIOSSAIOOWN)
1047 if (DEVICE_TTY_P (d))
1049 ioctl_status = ioctl (filedesc, FIOSSAIOOWN,
1050 &DEVICE_OLD_FCNTL_OWNER (d));
1052 #ifdef HAVE_WINDOW_SYSTEM
1053 else if (!DEVICE_STREAM_P (d))
1055 ioctl_status = ioctl (filedesc, SIOCSPGRP,
1056 &DEVICE_OLD_FCNTL_OWNER (d));
1060 #elif defined (F_SETOWN) && !defined (F_SETOWN_BUG)
1061 fcntl (filedesc, F_SETOWN, DEVICE_OLD_FCNTL_OWNER (d));
1066 request_sigio_on_device (struct device *d)
1068 int filedesc = DEVICE_INFD (d);
1070 #if defined (I_SETSIG) && !defined(HPUX10) && !defined(LINUX)
1073 ioctl (filedesc, I_GETSIG, &events);
1074 ioctl (filedesc, I_SETSIG, events | S_INPUT);
1076 #elif defined (FASYNC)
1077 fcntl (filedesc, F_SETFL, fcntl (filedesc, F_GETFL, 0) | FASYNC);
1078 #elif defined (FIOSSAIOSTAT)
1080 /* DG: Changed for HP-UX. HP-UX uses different IOCTLs for
1081 sockets and other devices for some bizarre reason. We guess
1082 that an X device is a socket, and tty devices aren't. We then
1083 use the following crud to do the appropriate thing. */
1085 int ioctl_status; /* ####DG: check if IOCTL succeeds here. */
1087 if (DEVICE_TTY_P (d))
1089 ioctl_status = ioctl (filedesc, FIOSSAIOSTAT, &on);
1091 #ifdef HAVE_WINDOW_SYSTEM
1092 else if (!DEVICE_STREAM_P (d))
1094 ioctl_status = ioctl (filedesc, FIOASYNC, &on);
1098 #elif defined (FIOASYNC)
1101 ioctl (filedesc, FIOASYNC, &on);
1105 #if defined (_CX_UX) /* #### Is this crap necessary? */
1106 EMACS_UNBLOCK_SIGNAL (SIGIO);
1111 unrequest_sigio_on_device (struct device *d)
1113 int filedesc = DEVICE_INFD (d);
1115 #if defined (I_SETSIG) && !defined(HPUX10)
1118 ioctl (filedesc, I_GETSIG, &events);
1119 ioctl (filedesc, I_SETSIG, events & ~S_INPUT);
1121 #elif defined (FASYNC)
1122 fcntl (filedesc, F_SETFL, fcntl (filedesc, F_GETFL, 0) & ~FASYNC);
1123 #elif defined (FIOSSAIOSTAT)
1125 /* DG: Changed for HP-UX. HP-UX uses different IOCTLs for
1126 sockets and other devices for some bizarre reason. We guess
1127 that an X device is a socket, and tty devices aren't. We then
1128 use the following crud to do the appropriate thing. */
1133 /* See comment for request_sigio_on_device */
1135 if (DEVICE_TTY_P (d))
1137 ioctl_status = ioctl (filedesc, FIOSSAIOSTAT, &off);
1141 ioctl_status = ioctl (filedesc, FIOASYNC, &off);
1144 #elif defined (FIOASYNC)
1147 ioctl (filedesc, FIOASYNC, &off);
1153 request_sigio (void)
1155 Lisp_Object devcons, concons;
1157 DEVICE_LOOP_NO_BREAK (devcons, concons)
1161 d = XDEVICE (XCAR (devcons));
1163 if (!DEVICE_STREAM_P (d))
1164 request_sigio_on_device (d);
1169 unrequest_sigio (void)
1171 Lisp_Object devcons, concons;
1173 DEVICE_LOOP_NO_BREAK (devcons, concons)
1177 d = XDEVICE (XCAR (devcons));
1179 if (!DEVICE_STREAM_P (d))
1180 unrequest_sigio_on_device (d);
1186 /* ------------------------------------------------------ */
1187 /* Changing Emacs's process group */
1188 /* ------------------------------------------------------ */
1190 /* Saving and restoring the process group of Emacs's terminal. */
1192 /* On some systems, apparently (?!) Emacs must be in its own process
1193 group in order to receive SIGIO correctly. On other systems
1194 (e.g. Solaris), it's not required and doing it makes things
1195 get fucked up. So, we only do it when
1196 SIGIO_REQUIRES_SEPARATE_PROCESS_GROUP is defined. Basically,
1197 this is only required for BSD 4.2 systems. (Actually, I bet
1198 we don't have to do this at all -- those systems also
1199 required interrupt input, which we don't support.)
1201 If Emacs was in its own process group (i.e. inherited_pgroup ==
1202 getpid ()), then we know we're running under a shell with job
1203 control (Emacs would never be run as part of a pipeline).
1206 If Emacs was not in its own process group, then we know we're
1207 running under a shell (or a caller) that doesn't know how to
1208 separate itself from Emacs (like sh). Emacs must be in its own
1209 process group in order to receive SIGIO correctly. In this
1210 situation, we put ourselves in our own pgroup, forcibly set the
1211 tty's pgroup to our pgroup, and make sure to restore and reinstate
1212 the tty's pgroup just like any other terminal setting. If
1213 inherited_group was not the tty's pgroup, then we'll get a
1214 SIGTTmumble when we try to change the tty's pgroup, and a CONT if
1215 it goes foreground in the future, which is what should happen. */
1217 #ifdef SIGIO_REQUIRES_SEPARATE_PROCESS_GROUP
1219 static int inherited_pgroup;
1220 static int inherited_tty_pgroup;
1225 munge_tty_process_group (void)
1227 #ifdef SIGIO_REQUIRES_SEPARATE_PROCESS_GROUP
1231 /* Only do this munging if we have a device on the controlling
1232 terminal. See the large comment below. */
1234 if (CONSOLEP (Vcontrolling_terminal) &&
1235 CONSOLE_LIVE_P (XCONSOLE (Vcontrolling_terminal)))
1237 int fd = open ("/dev/tty", O_RDWR, 0);
1239 EMACS_BLOCK_SIGNAL (SIGTTOU);
1240 EMACS_SET_TTY_PROCESS_GROUP (fd, &me);
1241 EMACS_UNBLOCK_SIGNAL (SIGTTOU);
1247 /* Split off the foreground process group to Emacs alone.
1248 When we are in the foreground, but not started in our own process
1249 group, redirect the TTY to point to our own process group. We need
1250 to be in our own process group to receive SIGIO properly. */
1252 munge_process_groups (void)
1254 #ifdef SIGIO_REQUIRES_SEPARATE_PROCESS_GROUP
1258 EMACS_SEPARATE_PROCESS_GROUP ();
1260 munge_tty_process_group ();
1265 unmunge_tty_process_group (void)
1267 #ifdef SIGIO_REQUIRES_SEPARATE_PROCESS_GROUP
1269 int fd = open ("/dev/tty", O_RDWR, 0);
1270 EMACS_BLOCK_SIGNAL (SIGTTOU);
1271 EMACS_SET_TTY_PROCESS_GROUP (fd, &inherited_tty_pgroup);
1272 EMACS_UNBLOCK_SIGNAL (SIGTTOU);
1278 /* Set the tty to our original foreground group.
1279 Also restore the original process group (put us back into sh's
1280 process group), so that ^Z will suspend both us and sh. */
1282 unmunge_process_groups (void)
1284 #ifdef SIGIO_REQUIRES_SEPARATE_PROCESS_GROUP
1288 unmunge_tty_process_group ();
1290 EMACS_SET_PROCESS_GROUP (inherited_pgroup);
1294 /* According to some old wisdom, we need to be in a separate process
1295 group for SIGIO to work correctly (at least on some systems ...).
1296 So go ahead and put ourselves into our own process group. This
1297 will fail if we're already in our own process group, but who cares.
1298 Also record whether we were in our own process group. (In general,
1299 we will already be in our own process group if we were started from
1300 a job-control shell like csh, but not if we were started from sh).
1302 If we succeeded in changing our process group, then we will no
1303 longer be in the foreground process group of our controlling
1304 terminal. Therefore, if we have a console open onto this terminal,
1305 we have to change the controlling terminal's foreground process
1306 group (otherwise we will get stopped with a SIGTTIN signal when
1307 attempting to read from the terminal). It's important,
1308 however, that we do this *only* when we have a console open onto
1309 the terminal. It's a decidedly bad idea to do so otherwise,
1310 especially if XEmacs was started from the background. */
1313 init_process_group (void)
1315 #ifdef SIGIO_REQUIRES_SEPARATE_PROCESS_GROUP
1316 if (! noninteractive)
1318 int fd = open ("/dev/tty", O_RDWR, 0);
1319 inherited_pgroup = EMACS_GET_PROCESS_GROUP ();
1320 EMACS_GET_TTY_PROCESS_GROUP (fd, &inherited_tty_pgroup);
1322 EMACS_SEPARATE_PROCESS_GROUP ();
1328 disconnect_controlling_terminal (void)
1331 /* Controlling terminals are attached to a session.
1332 Create a new session for us; it will have no controlling
1333 terminal. This also, of course, puts us in our own
1337 /* Put us in our own process group. */
1338 EMACS_SEPARATE_PROCESS_GROUP ();
1339 # if defined (TIOCNOTTY)
1340 /* This is the older way of disconnecting the controlling
1341 terminal, on 4.3 BSD. We must open /dev/tty; using
1342 filedesc 0 is not sufficient because it could be
1343 something else (e.g. our stdin was redirected to
1347 int j = open ("/dev/tty", O_RDWR, 0);
1348 ioctl (j, TIOCNOTTY, 0);
1351 # endif /* TIOCNOTTY */
1353 On systems without TIOCNOTTY and without
1354 setsid(), we don't need to do anything more to
1355 disconnect our controlling terminal. Here is
1356 what the man page for termio(7) from a SYSV 3.2
1359 "The first terminal file opened by the process group leader
1360 of a terminal file not already associated with a process
1361 group becomes the control terminal for that process group.
1362 The control terminal plays a special role in handling quit
1363 and interrupt signals, as discussed below. The control
1364 terminal is inherited by a child process during a fork(2).
1365 A process can break this association by changing its process
1366 group using setpgrp(2)."
1369 # endif /* not HAVE_SETSID */
1373 /* ------------------------------------------------------ */
1374 /* Getting and setting emacs_tty structures */
1375 /* ------------------------------------------------------ */
1377 /* It's wrong to encase these into #ifdef HAVE_TTY because we need
1378 them for child TTY processes. */
1379 /* However, this does break NT support while we don't do child TTY processes */
1382 /* Set *TC to the parameters associated with the terminal FD.
1383 Return zero if all's well, or -1 if we ran into an error we
1384 couldn't deal with. */
1386 emacs_get_tty (int fd, struct emacs_tty *settings)
1388 /* Retrieve the primary parameters - baud rate, character size, etcetera. */
1390 /* We have those nifty POSIX tcmumbleattr functions. */
1391 if (tcgetattr (fd, &settings->main) < 0)
1394 #elif defined HAVE_TERMIO
1395 /* The SYSV-style interface? */
1396 if (ioctl (fd, TCGETA, &settings->main) < 0)
1399 #elif !defined (WINDOWSNT)
1400 /* I give up - I hope you have the BSD ioctls. */
1401 if (ioctl (fd, TIOCGETP, &settings->main) < 0)
1403 #endif /* HAVE_TCATTR */
1405 /* Suivant - Do we have to get struct ltchars data? */
1407 if (ioctl (fd, TIOCGLTC, &settings->ltchars) < 0)
1411 /* How about a struct tchars and a wordful of lmode bits? */
1413 if (ioctl (fd, TIOCGETC, &settings->tchars) < 0
1414 || ioctl (fd, TIOCLGET, &settings->lmode) < 0)
1418 /* We have survived the tempest. */
1422 /* Set the parameters of the tty on FD according to the contents of
1423 *SETTINGS. If FLUSHP is non-zero, we discard input.
1424 Return 0 if all went well, and -1 if anything failed.
1425 #### All current callers use FLUSHP == 0. */
1428 emacs_set_tty (int fd, struct emacs_tty *settings, int flushp)
1430 /* Set the primary parameters - baud rate, character size, etcetera. */
1433 /* We have those nifty POSIX tcmumbleattr functions.
1434 William J. Smith <wjs@wiis.wang.com> writes:
1435 "POSIX 1003.1 defines tcsetattr() to return success if it was
1436 able to perform any of the requested actions, even if some
1437 of the requested actions could not be performed.
1438 We must read settings back to ensure tty setup properly.
1439 AIX requires this to keep tty from hanging occasionally." */
1440 /* This makes sure that we don't loop indefinitely in here. */
1441 for (i = 0 ; i < 10 ; i++)
1442 if (tcsetattr (fd, flushp ? TCSAFLUSH : TCSADRAIN, &settings->main) < 0)
1453 /* Get the current settings, and see if they're what we asked for. */
1454 tcgetattr (fd, &new);
1455 /* We cannot use memcmp on the whole structure here because under
1456 * aix386 the termios structure has some reserved field that may
1459 if ( new.c_iflag == settings->main.c_iflag
1460 && new.c_oflag == settings->main.c_oflag
1461 && new.c_cflag == settings->main.c_cflag
1462 && new.c_lflag == settings->main.c_lflag
1463 && memcmp(new.c_cc, settings->main.c_cc, NCCS) == 0)
1468 #elif defined HAVE_TERMIO
1469 /* The SYSV-style interface? */
1470 if (ioctl (fd, flushp ? TCSETAF : TCSETAW, &settings->main) < 0)
1473 #elif !defined (WINDOWSNT)
1474 /* I give up - I hope you have the BSD ioctls. */
1475 if (ioctl (fd, (flushp) ? TIOCSETP : TIOCSETN, &settings->main) < 0)
1477 #endif /* HAVE_TCATTR */
1479 /* Suivant - Do we have to get struct ltchars data? */
1481 if (ioctl (fd, TIOCSLTC, &settings->ltchars) < 0)
1485 /* How about a struct tchars and a wordful of lmode bits? */
1487 if (ioctl (fd, TIOCSETC, &settings->tchars) < 0
1488 || ioctl (fd, TIOCLSET, &settings->lmode) < 0)
1492 /* We have survived the tempest. */
1496 #endif /* WINDOWSNT */
1498 /* ------------------------------------------------------ */
1499 /* Initializing a device */
1500 /* ------------------------------------------------------ */
1504 /* This may also be defined in stdio,
1505 but if so, this does no harm,
1506 and using the same name avoids wasting the other one's space. */
1508 #if ((defined(USG) || defined(DGUX)) && !defined(__STDC__))
1509 char _sobuf[BUFSIZ+8];
1510 #elif (defined(USG) && !defined(LINUX) && !defined(_SCO_DS)) || defined(IRIX5)
1511 extern unsigned char _sobuf[BUFSIZ+8];
1513 char _sobuf[BUFSIZ];
1516 #if defined (TIOCGLTC) && defined (HAVE_LTCHARS) /* HAVE_LTCHARS */
1517 static struct ltchars new_ltchars = {-1,-1,-1,-1,-1,-1};
1519 #ifdef TIOCGETC /* HAVE_TCHARS */
1521 static struct tchars new_tchars = {-1,-1,-1,-1,-1,-1};
1526 tty_init_sys_modes_on_device (struct device *d)
1528 struct emacs_tty tty;
1529 int input_fd, output_fd;
1530 struct console *con = XCONSOLE (DEVICE_CONSOLE (d));
1532 input_fd = CONSOLE_TTY_DATA (con)->infd;
1533 output_fd = CONSOLE_TTY_DATA (con)->outfd;
1535 emacs_get_tty (input_fd, &CONSOLE_TTY_DATA (con)->old_tty);
1536 tty = CONSOLE_TTY_DATA (con)->old_tty;
1538 con->tty_erase_char = Qnil;
1540 #if defined (HAVE_TERMIO) || defined (HAVE_TERMIOS)
1541 /* after all those years... */
1542 con->tty_erase_char = make_char (tty.main.c_cc[VERASE]);
1544 /* This allows meta to be sent on 8th bit. */
1545 tty.main.c_iflag &= ~INPCK; /* don't check input for parity */
1547 tty.main.c_iflag |= (IGNBRK); /* Ignore break condition */
1548 tty.main.c_iflag &= ~ICRNL; /* Disable map of CR to NL on input */
1550 tty.main.c_iflag &= ~ISTRIP; /* don't strip 8th bit on input */
1552 tty.main.c_lflag &= ~ECHO; /* Disable echo */
1553 tty.main.c_lflag &= ~ICANON; /* Disable erase/kill processing */
1555 tty.main.c_lflag &= ~IEXTEN; /* Disable other editing characters. */
1557 tty.main.c_lflag |= ISIG; /* Enable signals */
1558 if (TTY_FLAGS (con).flow_control)
1560 tty.main.c_iflag |= IXON; /* Enable start/stop output control */
1562 tty.main.c_iflag &= ~IXANY;
1566 tty.main.c_iflag &= ~IXON; /* Disable start/stop output control */
1567 tty.main.c_oflag &= ~ONLCR; /* Disable map of NL to CR-NL
1569 tty.main.c_oflag &= ~TAB3; /* Disable tab expansion */
1571 if (TTY_FLAGS (con).meta_key)
1573 tty.main.c_cflag |= CS8; /* allow 8th bit on input */
1574 tty.main.c_cflag &= ~PARENB;/* Don't check parity */
1577 if (CONSOLE_TTY_DATA (con)->controlling_terminal)
1579 tty.main.c_cc[VINTR] =
1580 CONSOLE_QUIT_CHAR (con); /* C-g (usually) gives SIGINT */
1581 /* Set up C-g for both SIGQUIT and SIGINT.
1582 We don't know which we will get, but we handle both alike
1583 so which one it really gives us does not matter. */
1584 tty.main.c_cc[VQUIT] = CONSOLE_QUIT_CHAR (con);
1588 tty.main.c_cc[VINTR] = _POSIX_VDISABLE;
1589 tty.main.c_cc[VQUIT] = _POSIX_VDISABLE;
1591 tty.main.c_cc[VMIN] = 1; /* Input should wait for at
1593 tty.main.c_cc[VTIME] = 0; /* no matter how long that takes. */
1595 tty.main.c_cc[VSWTCH] = _POSIX_VDISABLE; /* Turn off shell layering use
1598 /* There was some conditionalizing here on (mips or TCATTR), but
1599 I think that's wrong. There was one report of C-y (DSUSP) not being
1600 disabled on HP9000s700 systems, and this might fix it. */
1602 tty.main.c_cc[VSUSP] = _POSIX_VDISABLE; /* Turn off mips handling of C-z. */
1605 tty.main.c_cc[V_DSUSP] = _POSIX_VDISABLE; /* Turn off mips handling of C-y. */
1606 #endif /* V_DSUSP */
1607 #ifdef VDSUSP /* Some systems have VDSUSP, some have V_DSUSP. */
1608 tty.main.c_cc[VDSUSP] = _POSIX_VDISABLE;
1611 tty.main.c_cc[VLNEXT] = _POSIX_VDISABLE;
1614 tty.main.c_cc[VREPRINT] = _POSIX_VDISABLE;
1615 #endif /* VREPRINT */
1617 tty.main.c_cc[VWERASE] = _POSIX_VDISABLE;
1618 #endif /* VWERASE */
1620 tty.main.c_cc[VDISCARD] = _POSIX_VDISABLE;
1621 #endif /* VDISCARD */
1623 tty.main.c_cc[VSTART] = _POSIX_VDISABLE;
1626 tty.main.c_cc[VSTRT] = _POSIX_VDISABLE; /* called VSTRT on some systems */
1629 tty.main.c_cc[VSTOP] = _POSIX_VDISABLE;
1631 #ifdef SET_LINE_DISCIPLINE
1632 /* Need to explicitly request TERMIODISC line discipline or
1633 Ultrix's termios does not work correctly. */
1634 tty.main.c_line = SET_LINE_DISCIPLINE;
1639 /* AIX enhanced edit loses NULs, so disable it. */
1640 tty.main.c_line = 0;
1641 tty.main.c_iflag &= ~ASCEDIT;
1643 tty.main.c_cc[VSTRT] = 255;
1644 tty.main.c_cc[VSTOP] = 255;
1645 tty.main.c_cc[VSUSP] = 255;
1646 tty.main.c_cc[VDSUSP] = 255;
1647 #endif /* IBMR2AIX */
1648 /* Also, PTY overloads NUL and BREAK.
1649 don't ignore break, but don't signal either, so it looks like NUL.
1650 This really serves a purpose only if running in an XTERM window
1651 or via TELNET or the like, but does no harm elsewhere. */
1652 tty.main.c_iflag &= ~IGNBRK;
1653 tty.main.c_iflag &= ~BRKINT;
1655 #else /* if not HAVE_TERMIO */
1656 #if !defined (WINDOWSNT)
1657 con->tty_erase_char = make_char (tty.main.sg_erase);
1658 tty.main.sg_flags &= ~(ECHO | CRMOD | XTABS);
1659 if (TTY_FLAGS (con).meta_key)
1660 tty.main.sg_flags |= ANYP;
1661 /* #### should we be using RAW mode here? */
1662 tty.main.sg_flags |= /* interrupt_input ? RAW : */ CBREAK;
1663 #endif /* not WINDOWSNT */
1664 #endif /* not HAVE_TERMIO */
1666 /* If going to use CBREAK mode, we must request C-g to interrupt
1667 and turn off start and stop chars, etc. If not going to use
1668 CBREAK mode, do this anyway so as to turn off local flow
1669 control for user coming over network on 4.2; in this case,
1670 only t_stopc and t_startc really matter. */
1673 /* Note: if not using CBREAK mode, it makes no difference how we
1675 tty.tchars = new_tchars;
1676 tty.tchars.t_intrc = CONSOLE_QUIT_CHAR (con);
1677 if (TTY_FLAGS (con).flow_control)
1679 tty.tchars.t_startc = '\021';
1680 tty.tchars.t_stopc = '\023';
1683 tty.lmode = LDECCTQ | LLITOUT | LPASS8 | LNOFLSH |
1684 CONSOLE_TTY_DATA (con)->old_tty.lmode;
1686 #if defined (ultrix) || defined (__bsdi__)
1687 /* Under Ultrix 4.2a, leaving this out doesn't seem to hurt
1688 anything, and leaving it in breaks the meta key. Go figure. */
1689 /* Turning off ONLCR is enough under BSD/386. Leave the general
1690 output post-processing flag alone since for some reason it
1691 doesn't get reset after XEmacs goes away. */
1692 tty.lmode &= ~LLITOUT;
1695 #endif /* HAVE_TCHARS */
1696 #endif /* not HAVE_TERMIO */
1699 tty.ltchars = new_ltchars;
1700 #endif /* HAVE_LTCHARS */
1702 emacs_set_tty (input_fd, &tty, 0);
1704 /* This code added to insure that, if flow-control is not to be used,
1705 we have an unlocked terminal at the start. */
1708 if (!TTY_FLAGS (con).flow_control) ioctl (input_fd, TCXONC, 1);
1711 if (!TTY_FLAGS (con).flow_control) ioctl (input_fd, TIOCSTART, 0);
1714 #if defined (HAVE_TERMIOS) || defined (HPUX9)
1716 if (!TTY_FLAGS (con).flow_control) tcflow (input_fd, TCOON);
1723 /* IBM's HFT device usually thinks a ^J should be LF/CR.
1724 We need it to be only LF. This is the way that is
1728 if (ioctl (output_fd, HFTGETID, &tty) != -1)
1729 write (output_fd, "\033[20l", 5);
1734 #if 0 /* We do our own buffering with lstreams. */
1736 /* This symbol is defined on recent USG systems.
1737 Someone says without this call USG won't really buffer the file
1738 even with a call to setbuf. */
1739 setvbuf (CONSOLE_TTY_DATA (con)->outfd, (char *) _sobuf, _IOFBF, sizeof _sobuf);
1741 setbuf (CONSOLE_TTY_DATA (con)->outfd, (char *) _sobuf);
1744 set_tty_modes (con);
1747 #endif /* HAVE_TTY */
1750 init_one_device (struct device *d)
1753 if (DEVICE_TTY_P (d))
1754 tty_init_sys_modes_on_device (d);
1756 #if defined(SIGIO) && !defined(BROKEN_SIGIO)
1757 if (!DEVICE_STREAM_P (d))
1759 init_sigio_on_device (d);
1760 request_sigio_on_device (d);
1766 init_one_console (struct console *con)
1768 Lisp_Object devcons;
1770 CONSOLE_DEVICE_LOOP (devcons, con)
1772 struct device *d = XDEVICE (XCAR (devcons));
1774 init_one_device (d);
1779 reinit_initial_console (void)
1781 munge_process_groups ();
1782 if (CONSOLEP (Vcontrolling_terminal) &&
1783 CONSOLE_LIVE_P (XCONSOLE (Vcontrolling_terminal)))
1784 init_one_console (XCONSOLE (Vcontrolling_terminal));
1788 /* ------------------------------------------------------ */
1789 /* Other TTY functions */
1790 /* ------------------------------------------------------ */
1794 #if 0 /* not currently used */
1796 /* Return nonzero if safe to use tabs in output.
1797 At the time this is called, init_sys_modes has not been done yet. */
1800 tabs_safe_p (struct device *d)
1803 if (DEVICE_TTY_P (d))
1805 struct emacs_tty tty;
1807 emacs_get_tty (DEVICE_INFD (d), &tty);
1808 return EMACS_TTY_TABS_OK (&tty);
1816 /* Get terminal size from system.
1817 Store number of lines into *heightp and width into *widthp.
1818 If zero or a negative number is stored, the value is not valid. */
1821 get_tty_device_size (struct device *d, int *widthp, int *heightp)
1823 int input_fd = DEVICE_INFD (d);
1825 assert (DEVICE_TTY_P (d));
1830 struct winsize size;
1832 if (ioctl (input_fd, TIOCGWINSZ, &size) == -1)
1833 *widthp = *heightp = 0;
1836 *widthp = size.ws_col;
1837 *heightp = size.ws_row;
1840 #elif defined TIOCGSIZE
1842 /* SunOS - style. */
1843 struct ttysize size;
1845 if (ioctl (input_fd, TIOCGSIZE, &size) == -1)
1846 *widthp = *heightp = 0;
1849 *widthp = size.ts_cols;
1850 *heightp = size.ts_lines;
1853 #else /* system doesn't know size */
1858 #endif /* not !TIOCGWINSZ */
1861 #endif /* HAVE_TTY */
1864 /* ------------------------------------------------------ */
1865 /* Is device 8 bit ? */
1866 /* ------------------------------------------------------ */
1871 eight_bit_tty (struct device *d)
1877 assert (DEVICE_TTY_P (d));
1878 input_fd = DEVICE_INFD (d);
1880 emacs_get_tty (input_fd, &s);
1882 #if defined (HAVE_TERMIO) || defined (HAVE_TERMIOS)
1883 eight_bit = (s.main.c_cflag & CSIZE) == CS8;
1885 eight_bit = 0; /* I don't know how to do it */
1890 #endif /* HAVE_TTY */
1893 /* ------------------------------------------------------ */
1894 /* Resetting a device */
1895 /* ------------------------------------------------------ */
1899 /* Prepare the terminal for exiting Emacs; move the cursor to the
1900 bottom of the frame, turn off interrupt-driven I/O, etc. */
1902 tty_reset_sys_modes_on_device (struct device *d)
1904 int input_fd, output_fd;
1905 struct console *con = XCONSOLE (DEVICE_CONSOLE (d));
1907 input_fd = CONSOLE_TTY_DATA (con)->infd;
1908 output_fd = CONSOLE_TTY_DATA (con)->outfd;
1910 #if defined (IBMR2AIX) && defined (AIXHFT)
1912 /* HFT consoles normally use ^J as a LF/CR. We forced it to
1913 do the LF only. Now, we need to reset it. */
1916 if (ioctl (output_fd, HFTGETID, &tty) != -1)
1917 write (output_fd, "\033[20h", 5);
1921 tty_redisplay_shutdown (con);
1922 /* reset_tty_modes() flushes the connection at its end. */
1923 reset_tty_modes (con);
1926 /* Avoid possible loss of output when changing terminal modes. */
1930 while (emacs_set_tty (input_fd, &CONSOLE_TTY_DATA (con)->old_tty, 0)
1931 < 0 && errno == EINTR)
1934 #ifdef SET_LINE_DISCIPLINE
1935 /* Ultrix's termios *ignores* any line discipline except TERMIODISC.
1936 A different old line discipline is therefore not restored, yet.
1937 Restore the old line discipline by hand. */
1938 ioctl (input_fd, TIOCSETD, &old_tty.main.c_line);
1947 #endif /* HAVE_TTY */
1950 reset_one_device (struct device *d)
1953 if (DEVICE_TTY_P (d))
1954 tty_reset_sys_modes_on_device (d);
1957 if (DEVICE_STREAM_P (d))
1958 fflush (CONSOLE_STREAM_DATA (XCONSOLE (DEVICE_CONSOLE (d)))->out);
1959 #if defined(SIGIO) && !defined(BROKEN_SIGIO)
1960 if (!DEVICE_STREAM_P (d))
1962 unrequest_sigio_on_device (d);
1963 reset_sigio_on_device (d);
1969 reset_one_console (struct console *con)
1971 /* Note: this can be called during GC. */
1972 Lisp_Object devcons;
1974 CONSOLE_DEVICE_LOOP (devcons, con)
1976 struct device *d = XDEVICE (XCAR (devcons));
1978 reset_one_device (d);
1983 reset_all_consoles (void)
1985 /* Note: this can be called during GC. */
1986 Lisp_Object concons;
1988 CONSOLE_LOOP (concons)
1990 struct console *con = XCONSOLE (XCAR (concons));
1992 reset_one_console (con);
1995 unmunge_process_groups ();
1999 reset_initial_console (void)
2001 if (CONSOLEP (Vcontrolling_terminal) &&
2002 CONSOLE_LIVE_P (XCONSOLE (Vcontrolling_terminal)))
2003 reset_one_console (XCONSOLE (Vcontrolling_terminal));
2004 unmunge_process_groups ();
2008 /* ------------------------------------------------------ */
2009 /* extra TTY stuff under AIX */
2010 /* ------------------------------------------------------ */
2014 /* Called from init_sys_modes. */
2016 hft_init (struct console *con)
2021 assert (CONSOLE_TTY_P (con));
2022 input_fd = CONSOLE_TTY_DATA (con)->infd;
2024 /* If we're not on an HFT we shouldn't do any of this. We determine
2025 if we are on an HFT by trying to get an HFT error code. If this
2026 call fails, we're not on an HFT. */
2028 if (ioctl (input_fd, HFQERROR, &junk) < 0)
2030 #else /* not IBMR2AIX */
2031 if (ioctl (input_fd, HFQEIO, 0) < 0)
2033 #endif /* not IBMR2AIX */
2035 /* On AIX the default hft keyboard mapping uses backspace rather than delete
2036 as the rubout key's ASCII code. Here this is changed. The bug is that
2037 there's no way to determine the old mapping, so in reset_one_console
2038 we need to assume that the normal map had been present. Of course, this
2039 code also doesn't help if on a terminal emulator which doesn't understand
2043 struct hfkeymap keymap;
2045 buf.hf_bufp = (char *)&keymap;
2046 buf.hf_buflen = sizeof (keymap);
2047 keymap.hf_nkeys = 2;
2048 keymap.hfkey[0].hf_kpos = 15;
2049 keymap.hfkey[0].hf_kstate = HFMAPCHAR | HFSHFNONE;
2051 keymap.hfkey[0].hf_keyidh = '<';
2052 #else /* not IBMR2AIX */
2053 keymap.hfkey[0].hf_page = '<';
2054 #endif /* not IBMR2AIX */
2055 keymap.hfkey[0].hf_char = 127;
2056 keymap.hfkey[1].hf_kpos = 15;
2057 keymap.hfkey[1].hf_kstate = HFMAPCHAR | HFSHFSHFT;
2059 keymap.hfkey[1].hf_keyidh = '<';
2060 #else /* not IBMR2AIX */
2061 keymap.hfkey[1].hf_page = '<';
2062 #endif /* not IBMR2AIX */
2063 keymap.hfkey[1].hf_char = 127;
2064 hftctl (input_fd, HFSKBD, &buf);
2066 /* #### Should probably set a console TTY flag here. */
2068 /* The HFT system on AIX doesn't optimize for scrolling, so it's really ugly
2070 line_ins_del_ok = char_ins_del_ok = 0;
2074 /* Reset the rubout key to backspace. */
2077 hft_reset (struct console *con)
2080 struct hfkeymap keymap;
2084 assert (CONSOLE_TTY_P (con));
2085 input_fd = CONSOLE_TTY_DATA (con)->infd;
2088 if (ioctl (input_fd, HFQERROR, &junk) < 0)
2090 #else /* not IBMR2AIX */
2091 if (ioctl (input_fd, HFQEIO, 0) < 0)
2093 #endif /* not IBMR2AIX */
2095 buf.hf_bufp = (char *)&keymap;
2096 buf.hf_buflen = sizeof (keymap);
2097 keymap.hf_nkeys = 2;
2098 keymap.hfkey[0].hf_kpos = 15;
2099 keymap.hfkey[0].hf_kstate = HFMAPCHAR | HFSHFNONE;
2101 keymap.hfkey[0].hf_keyidh = '<';
2102 #else /* not IBMR2AIX */
2103 keymap.hfkey[0].hf_page = '<';
2104 #endif /* not IBMR2AIX */
2105 keymap.hfkey[0].hf_char = 8;
2106 keymap.hfkey[1].hf_kpos = 15;
2107 keymap.hfkey[1].hf_kstate = HFMAPCHAR | HFSHFSHFT;
2109 keymap.hfkey[1].hf_keyidh = '<';
2110 #else /* not IBMR2AIX */
2111 keymap.hfkey[1].hf_page = '<';
2112 #endif /* not IBMR2AIX */
2113 keymap.hfkey[1].hf_char = 8;
2114 hftctl (input_fd, HFSKBD, &buf);
2120 /************************************************************************/
2121 /* limits of text/data segments */
2122 /************************************************************************/
2124 #if !defined(CANNOT_DUMP) && !defined(PDUMP)
2128 #ifndef SYSTEM_MALLOC
2135 /* Some systems that cannot dump also cannot implement these. */
2138 * Return the address of the start of the text segment prior to
2139 * doing an unexec. After unexec the return value is undefined.
2140 * See crt0.c for further explanation and _start.
2144 #if !defined(HAVE_TEXT_START) && !defined(PDUMP)
2147 extern "C" int _start (void);
2149 extern int _start (void);
2153 start_of_text (void)
2156 return ((char *) TEXT_START);
2160 return ((char *) csrt);
2161 #else /* not GOULD */
2162 return ((char *) _start);
2164 #endif /* TEXT_START */
2166 #endif /* !defined(HAVE_TEXT_START) && !defined(PDUMP) */
2169 * Return the address of the start of the data segment prior to
2170 * doing an unexec. After unexec the return value is undefined.
2171 * See crt0.c for further information and definition of data_start.
2173 * Apparently, on BSD systems this is etext at startup. On
2174 * USG systems (swapping) this is highly mmu dependent and
2175 * is also dependent on whether or not the program is running
2176 * with shared text. Generally there is a (possibly large)
2177 * gap between end of text and start of data with shared text.
2179 * On Uniplus+ systems with shared text, data starts at a
2180 * fixed address. Each port (from a given oem) is generally
2181 * different, and the specific value of the start of data can
2182 * be obtained via the UniPlus+ specific "uvar" system call,
2183 * however the method outlined in crt0.c seems to be more portable.
2185 * Probably what will have to happen when a USG unexec is available,
2186 * at least on UniPlus, is temacs will have to be made unshared so
2187 * that text and data are contiguous. Then once loadup is complete,
2188 * unexec will produce a shared executable where the data can be
2189 * at the normal shared text boundary and the startofdata variable
2190 * will be patched by unexec to the correct value.
2194 #ifdef ORDINARY_LINK
2195 extern char **environ;
2199 start_of_data (void)
2202 return ((char *) DATA_START);
2204 #ifdef ORDINARY_LINK
2206 * This is a hack. Since we're not linking crt0.c or pre_crt0.c,
2207 * data_start isn't defined. We take the address of environ, which
2208 * is known to live at or near the start of the system crt0.c, and
2209 * we don't sweat the handful of bytes that might lose.
2212 extern char* static_heap_base;
2214 return static_heap_base;
2216 return((char *) &environ);
2218 extern int data_start;
2219 return ((char *) &data_start);
2220 #endif /* ORDINARY_LINK */
2221 #endif /* DATA_START */
2223 #endif /* NEED_STARTS (not CANNOT_DUMP or not SYSTEM_MALLOC) */
2225 #if !defined(CANNOT_DUMP) && !defined(PDUMP)
2226 /* Some systems that cannot dump also cannot implement these. */
2229 * Return the address of the end of the text segment prior to
2230 * doing an unexec. After unexec the return value is undefined.
2237 return ((char *) TEXT_END);
2240 return ((char *) &etext);
2245 * Return the address of the end of the data segment prior to
2246 * doing an unexec. After unexec the return value is undefined.
2253 return ((char *) DATA_END);
2256 return ((char *) &edata);
2260 #endif /* !defined(CANNOT_DUMP) && !defined(PDUMP) */
2263 /************************************************************************/
2264 /* get the system name */
2265 /************************************************************************/
2267 /* init_system_name sets up the string for the Lisp function
2268 system-name to return. */
2270 extern Lisp_Object Vsystem_name;
2273 # include <sys/socket.h>
2275 #endif /* HAVE_SOCKETS */
2278 init_system_name (void)
2280 #if defined (WINDOWSNT)
2281 char hostname [MAX_COMPUTERNAME_LENGTH + 1];
2282 size_t size = sizeof (hostname);
2283 GetComputerName (hostname, &size);
2284 Vsystem_name = build_string (hostname);
2285 #elif !defined (HAVE_GETHOSTNAME)
2288 Vsystem_name = build_string (uts.nodename);
2289 #else /* HAVE_GETHOSTNAME */
2290 unsigned int hostname_size = 256;
2291 char *hostname = (char *) alloca (hostname_size);
2293 /* Try to get the host name; if the buffer is too short, try
2294 again. Apparently, the only indication gethostname gives of
2295 whether the buffer was large enough is the presence or absence
2296 of a '\0' in the string. Eech. */
2299 gethostname (hostname, hostname_size - 1);
2300 hostname[hostname_size - 1] = '\0';
2302 /* Was the buffer large enough for the '\0'? */
2303 if (strlen (hostname) < (size_t) (hostname_size - 1))
2306 hostname_size <<= 1;
2307 hostname = (char *) alloca (hostname_size);
2309 # if defined( HAVE_SOCKETS) && !defined(BROKEN_CYGWIN)
2310 /* Turn the hostname into the official, fully-qualified hostname.
2311 Don't do this if we're going to dump; this can confuse system
2312 libraries on some machines and make the dumped emacs core dump. */
2313 # ifndef CANNOT_DUMP
2315 # endif /* not CANNOT_DUMP */
2316 if (!strchr (hostname, '.'))
2318 # if !(defined(HAVE_GETADDRINFO) && defined(HAVE_GETNAMEINFO))
2319 struct hostent *hp = NULL;
2322 for (count = 0; count < 10; count++)
2326 /* Some systems can't handle SIGALARM/SIGIO in gethostbyname(). */
2328 hp = gethostbyname (hostname);
2329 start_interrupts ();
2331 if (! (hp == 0 && h_errno == TRY_AGAIN))
2333 Fsleep_for (make_int (1));
2338 const char *fqdn = (const char *) hp->h_name;
2340 if (!strchr (fqdn, '.'))
2342 /* We still don't have a fully qualified domain name.
2343 Try to find one in the list of alternate names */
2344 char **alias = hp->h_aliases;
2345 while (*alias && !strchr (*alias, '.'))
2350 hostname = (char *) alloca (strlen (fqdn) + 1);
2351 strcpy (hostname, fqdn);
2353 # else /* !(HAVE_GETADDRINFO && HAVE_GETNAMEINFO) */
2354 struct addrinfo hints, *res;
2357 hints.ai_flags = AI_CANONNAME;
2358 hints.ai_family = AF_UNSPEC;
2359 hints.ai_socktype = SOCK_STREAM;
2360 hints.ai_protocol = 0;
2361 if (!getaddrinfo (hostname, NULL, &hints, &res))
2363 hostname = (char *) alloca (strlen (res->ai_canonname) + 1);
2364 strcpy (hostname, res->ai_canonname);
2368 # endif /* !(HAVE_GETADDRINFO && HAVE_GETNAMEINFO) */
2370 # endif /* HAVE_SOCKETS */
2371 Vsystem_name = build_string (hostname);
2372 #endif /* HAVE_GETHOSTNAME */
2377 for (i = 0, p = XSTRING_DATA (Vsystem_name);
2378 i < XSTRING_LENGTH (Vsystem_name);
2381 if (*p == ' ' || *p == '\t')
2388 /************************************************************************/
2389 /* Emulation of select() */
2390 /************************************************************************/
2394 ERROR: XEmacs requires a working select().
2396 #endif /* not HAVE_SELECT */
2399 /************************************************************************/
2400 /* Emulation of signal stuff */
2401 /************************************************************************/
2403 /* BSD 4.1 crap deleted. 4.2 was released in 1983, for God's sake! I
2404 can't imagine that anyone is actually running that OS any more.
2405 You can't use X under it (I think) because there's no select().
2406 Anyway, the signal stuff has all been changed. If someone wants to
2407 get this stuff working again, look in the FSF Emacs sources. */
2409 /* POSIX signals support - DJB */
2411 #ifdef HAVE_SIGPROCMASK
2413 /* #### Is there any reason this is static global rather than local? */
2414 static struct sigaction new_action, old_action;
2417 sys_do_signal (int signal_number, signal_handler_t action)
2421 /* XEmacs works better if system calls are *not* restarted.
2422 This allows C-g to interrupt reads and writes, on most systems.
2424 #### Another possibility is to just longjmp() out of the signal
2425 handler. According to W.R. Stevens, this should be OK on all
2426 systems. However, I don't want to deal with the potential
2427 evil ramifications of this at this point. */
2430 /* This gets us restartable system calls for efficiency.
2431 The "else" code will work as well. */
2432 return (berk_signal (signal_number, action));
2434 sigemptyset (&new_action.sa_mask);
2435 new_action.sa_handler = action;
2436 #if defined (SA_RESTART)
2437 /* Emacs mostly works better with restartable system services. If this
2438 * flag exists, we probably want to turn it on here.
2440 new_action.sa_flags = SA_RESTART;
2442 new_action.sa_flags = 0;
2444 sigaction (signal_number, &new_action, &old_action);
2445 return (old_action.sa_handler);
2450 sigemptyset (&new_action.sa_mask);
2451 new_action.sa_handler = action;
2452 #if defined (SA_INTERRUPT) /* don't restart system calls, under SunOS */
2453 new_action.sa_flags = SA_INTERRUPT;
2455 new_action.sa_flags = 0;
2457 sigaction (signal_number, &new_action, &old_action);
2458 return (signal_handler_t) (old_action.sa_handler);
2463 #elif defined (HAVE_SIGBLOCK)
2465 /* We use sigvec() rather than signal() if we have it, because
2466 it lets us specify interruptible system calls. */
2468 sys_do_signal (int signal_number, signal_handler_t action)
2470 struct sigvec vec, ovec;
2472 vec.sv_handler = action;
2474 #ifdef SV_INTERRUPT /* don't restart system calls */
2475 vec.sv_flags = SV_INTERRUPT;
2480 sigvec (signal_number, &vec, &ovec);
2482 return (ovec.sv_handler);
2485 #endif /* HAVE_SIGBLOCK (HAVE_SIGPROCMASK) */
2488 /************************************************************************/
2489 /* Emulation of strerror() and errno support */
2490 /************************************************************************/
2492 #ifndef HAVE_STRERROR
2494 #if !defined(NeXT) && !defined(__alpha) && !defined(MACH) && !defined(LINUX) && !defined(IRIX) && !defined(__NetBSD__)
2495 /* Linux added here by Raymond L. Toy <toy@alydar.crd.ge.com> for XEmacs. */
2496 /* Irix added here by gparker@sni-usa.com for XEmacs. */
2497 /* NetBSD added here by James R Grinter <jrg@doc.ic.ac.uk> for XEmacs */
2498 extern const char *sys_errlist[];
2499 extern int sys_nerr;
2503 extern char *sys_errlist[];
2504 extern int sys_nerr;
2509 strerror (int errnum)
2511 if (errnum >= 0 && errnum < sys_nerr)
2512 return sys_errlist[errnum];
2513 return ((const char *) GETTEXT ("Unknown error"));
2516 #endif /* ! HAVE_STRERROR */
2521 unsigned long oscode; /* Win32 error */
2522 int errnocode; /* unix errno */
2525 static struct errentry errtable[] = {
2526 { ERROR_INVALID_FUNCTION, EINVAL }, /* 1 */
2527 { ERROR_FILE_NOT_FOUND, ENOENT }, /* 2 */
2528 { ERROR_PATH_NOT_FOUND, ENOENT }, /* 3 */
2529 { ERROR_TOO_MANY_OPEN_FILES, EMFILE }, /* 4 */
2530 { ERROR_ACCESS_DENIED, EACCES }, /* 5 */
2531 { ERROR_INVALID_HANDLE, EBADF }, /* 6 */
2532 { ERROR_ARENA_TRASHED, ENOMEM }, /* 7 */
2533 { ERROR_NOT_ENOUGH_MEMORY, ENOMEM }, /* 8 */
2534 { ERROR_INVALID_BLOCK, ENOMEM }, /* 9 */
2535 { ERROR_BAD_ENVIRONMENT, E2BIG }, /* 10 */
2536 { ERROR_BAD_FORMAT, ENOEXEC }, /* 11 */
2537 { ERROR_INVALID_ACCESS, EINVAL }, /* 12 */
2538 { ERROR_INVALID_DATA, EINVAL }, /* 13 */
2539 { ERROR_INVALID_DRIVE, ENOENT }, /* 15 */
2540 { ERROR_CURRENT_DIRECTORY, EACCES }, /* 16 */
2541 { ERROR_NOT_SAME_DEVICE, EXDEV }, /* 17 */
2542 { ERROR_NO_MORE_FILES, ENOENT }, /* 18 */
2543 { ERROR_LOCK_VIOLATION, EACCES }, /* 33 */
2544 { ERROR_BAD_NETPATH, ENOENT }, /* 53 */
2545 { ERROR_NETWORK_ACCESS_DENIED, EACCES }, /* 65 */
2546 { ERROR_BAD_NET_NAME, ENOENT }, /* 67 */
2547 { ERROR_FILE_EXISTS, EEXIST }, /* 80 */
2548 { ERROR_CANNOT_MAKE, EACCES }, /* 82 */
2549 { ERROR_FAIL_I24, EACCES }, /* 83 */
2550 { ERROR_INVALID_PARAMETER, EINVAL }, /* 87 */
2551 { ERROR_NO_PROC_SLOTS, EAGAIN }, /* 89 */
2552 { ERROR_DRIVE_LOCKED, EACCES }, /* 108 */
2553 { ERROR_BROKEN_PIPE, EPIPE }, /* 109 */
2554 { ERROR_DISK_FULL, ENOSPC }, /* 112 */
2555 { ERROR_INVALID_TARGET_HANDLE, EBADF }, /* 114 */
2556 { ERROR_INVALID_HANDLE, EINVAL }, /* 124 */
2557 { ERROR_WAIT_NO_CHILDREN, ECHILD }, /* 128 */
2558 { ERROR_CHILD_NOT_COMPLETE, ECHILD }, /* 129 */
2559 { ERROR_DIRECT_ACCESS_HANDLE, EBADF }, /* 130 */
2560 { ERROR_NEGATIVE_SEEK, EINVAL }, /* 131 */
2561 { ERROR_SEEK_ON_DEVICE, EACCES }, /* 132 */
2562 { ERROR_DIR_NOT_EMPTY, ENOTEMPTY }, /* 145 */
2563 { ERROR_NOT_LOCKED, EACCES }, /* 158 */
2564 { ERROR_BAD_PATHNAME, ENOENT }, /* 161 */
2565 { ERROR_MAX_THRDS_REACHED, EAGAIN }, /* 164 */
2566 { ERROR_LOCK_FAILED, EACCES }, /* 167 */
2567 { ERROR_ALREADY_EXISTS, EEXIST }, /* 183 */
2568 { ERROR_FILENAME_EXCED_RANGE, ENOENT }, /* 206 */
2569 { ERROR_NESTING_NOT_ALLOWED, EAGAIN }, /* 215 */
2570 { ERROR_NOT_ENOUGH_QUOTA, ENOMEM } /* 1816 */
2573 /* The following two constants must be the minimum and maximum
2574 values in the (contiguous) range of Exec Failure errors. */
2575 #define MIN_EXEC_ERROR ERROR_INVALID_STARTING_CODESEG
2576 #define MAX_EXEC_ERROR ERROR_INFLOOP_IN_RELOC_CHAIN
2578 /* These are the low and high value in the range of errors that are
2579 access violations */
2580 #define MIN_EACCES_RANGE ERROR_WRITE_PROTECT
2581 #define MAX_EACCES_RANGE ERROR_SHARING_BUFFER_EXCEEDED
2584 mswindows_set_errno (unsigned long win32_error)
2588 /* check the table for the OS error code */
2589 for (i = 0; i < countof (errtable); ++i)
2591 if (win32_error == errtable[i].oscode)
2593 errno = errtable[i].errnocode;
2598 /* The error code wasn't in the table. We check for a range of
2599 * EACCES errors or exec failure errors (ENOEXEC). Otherwise EINVAL is
2601 if (win32_error >= MIN_EACCES_RANGE && win32_error <= MAX_EACCES_RANGE)
2603 else if (win32_error >= MIN_EXEC_ERROR && win32_error <= MAX_EXEC_ERROR)
2610 mswindows_set_last_errno (void)
2612 mswindows_set_errno (GetLastError ());
2615 #endif /* WINDOWSNT */
2618 /************************************************************************/
2619 /* Encapsulations of system calls */
2620 /************************************************************************/
2622 #define PATHNAME_CONVERT_OUT(path) \
2623 TO_EXTERNAL_FORMAT (C_STRING, (path), C_STRING_ALLOCA, (path), Qfile_name);
2625 /***************** low-level calls ****************/
2628 * On USG systems the system calls are INTERRUPTIBLE by signals
2629 * that the user program has elected to catch. Thus the system call
2630 * must be retried in these cases. To handle this without massive
2631 * changes in the source code, we remap the standard system call names
2632 * to names for our own functions in sysdep.c that do the system call
2633 * with retries. Actually, for portability reasons, it is good
2634 * programming practice, as this example shows, to limit all actual
2635 * system calls to a single occurrence in the source. Sure, this
2636 * adds an extra level of function call overhead but it is almost
2637 * always negligible. Fred Fish, Unisoft Systems Inc.
2640 /* Ben sez: read Dick Gabriel's essay about the Worse Is Better
2641 approach to programming and its connection to the silly
2642 interruptible-system-call business. To find it, look on
2643 Jamie's home page (http://www.jwz.org/worse-is-better.html). */
2645 #ifdef ENCAPSULATE_OPEN
2647 sys_open (const char *path, int oflag, ...)
2652 va_start (ap, oflag);
2653 mode = va_arg (ap, int);
2657 /* Make all handles non-inheritable */
2658 oflag |= _O_NOINHERIT;
2661 #ifdef INTERRUPTIBLE_OPEN
2664 while ((rtnval = open (path, oflag, mode)) == -1
2665 && (errno == EINTR))
2670 return open (path, oflag, mode);
2673 #endif /* ENCAPSULATE_OPEN */
2675 /* Like sys_open, only when open() is interrupted by EINTR, check for
2676 QUIT. This allows the callers of this function to be interrupted
2677 with C-g when, say, reading from named pipes. However, this should
2678 be used with caution, as it can GC.
2680 This function will not function as expected on systems where open()
2681 is not interrupted by C-g. However, the worst that can happen is
2682 the fallback to simple open(). */
2684 interruptible_open (const char *path, int oflag, int mode)
2686 /* This function can GC */
2687 size_t len = strlen (path);
2688 char *nonreloc = (char *) alloca (len + 1);
2690 /* Must copy PATH, because it might be the data of a Lisp_String,
2691 which could be relocated by GC when checking for QUIT. */
2692 memcpy (nonreloc, path, len + 1);
2694 PATHNAME_CONVERT_OUT (nonreloc);
2697 /* Make all handles non-inheritable */
2698 oflag |= _O_NOINHERIT;
2703 int rtnval = open (nonreloc, oflag, mode);
2704 if (!(rtnval == -1 && errno == EINTR))
2706 /* open() was interrupted. Was QUIT responsible? */
2711 #ifdef ENCAPSULATE_CLOSE
2713 sys_close (int filedes)
2715 #ifdef INTERRUPTIBLE_CLOSE
2717 REGISTER int rtnval;
2719 while ((rtnval = close (filedes)) == -1
2720 && (errno == EINTR))
2723 /* If close is interrupted SunOS 4.1 may or may not have closed the
2724 file descriptor. If it did the second close will fail with
2725 errno = EBADF. That means we have succeeded. */
2726 if (rtnval == -1 && did_retry && errno == EBADF)
2731 return close (filedes);
2734 #endif /* ENCAPSULATE_CLOSE */
2737 sys_read_1 (int fildes, void *buf, size_t nbyte, int allow_quit)
2741 /* No harm in looping regardless of the INTERRUPTIBLE_IO setting. */
2742 while ((rtnval = read (fildes, buf, nbyte)) == -1
2743 && (errno == EINTR))
2751 #ifdef ENCAPSULATE_READ
2753 sys_read (int fildes, void *buf, size_t nbyte)
2755 return sys_read_1 (fildes, buf, nbyte, 0);
2757 #endif /* ENCAPSULATE_READ */
2760 sys_write_1 (int fildes, const void *buf, size_t nbyte, int allow_quit)
2762 ssize_t bytes_written = 0;
2763 const char *b = (const char *) buf;
2765 /* No harm in looping regardless of the INTERRUPTIBLE_IO setting. */
2768 ssize_t rtnval = write (fildes, b, nbyte);
2778 return bytes_written ? bytes_written : -1;
2782 bytes_written += rtnval;
2784 return bytes_written;
2787 #ifdef ENCAPSULATE_WRITE
2789 sys_write (int fildes, const void *buf, size_t nbyte)
2791 return sys_write_1 (fildes, buf, nbyte, 0);
2793 #endif /* ENCAPSULATE_WRITE */
2796 /**************** stdio calls ****************/
2798 /* There is at least some evidence that the stdio calls are interruptible
2799 just like the normal system calls, at least on some systems. In any
2800 case, it doesn't hurt to encapsulate them. */
2802 /* #### Should also encapsulate fflush().
2803 #### Should conceivably encapsulate getchar() etc. What a pain! */
2805 #ifdef ENCAPSULATE_FOPEN
2807 sys_fopen (const char *path, const char *type)
2809 PATHNAME_CONVERT_OUT (path);
2810 #if defined (WINDOWSNT)
2814 const char * type_save = type;
2816 /* Force all file handles to be non-inheritable. This is necessary to
2817 ensure child processes don't unwittingly inherit handles that might
2818 prevent future file access. */
2822 else if (type[0] == 'w' || type[0] == 'a')
2823 oflag = O_WRONLY | O_CREAT | O_TRUNC;
2827 /* Only do simplistic option parsing. */
2831 oflag &= ~(O_RDONLY | O_WRONLY);
2834 else if (type[0] == 'b')
2839 else if (type[0] == 't')
2846 fd = open (path, oflag | _O_NOINHERIT, 0644);
2850 return _fdopen (fd, type_save);
2852 #elif defined (INTERRUPTIBLE_OPEN)
2855 while (!(rtnval = fopen (path, type)) && (errno == EINTR))
2860 return fopen (path, type);
2863 #endif /* ENCAPSULATE_FOPEN */
2866 #ifdef ENCAPSULATE_FCLOSE
2868 sys_fclose (FILE *stream)
2870 #ifdef INTERRUPTIBLE_CLOSE
2873 while ((rtnval = fclose (stream)) == EOF
2874 && (errno == EINTR))
2878 return fclose (stream);
2881 #endif /* ENCAPSULATE_FCLOSE */
2884 #ifdef ENCAPSULATE_FREAD
2886 sys_fread (void *ptr, size_t size, size_t nitem, FILE *stream)
2888 #ifdef INTERRUPTIBLE_IO
2890 size_t items_read = 0;
2891 char *b = (char *) ptr;
2895 rtnval = fread (b, size, nitem, stream);
2898 if (ferror (stream) && errno == EINTR)
2905 items_read += rtnval;
2907 return (items_read);
2909 return fread (ptr, size, nitem, stream);
2912 #endif /* ENCAPSULATE_FREAD */
2915 #ifdef ENCAPSULATE_FWRITE
2917 sys_fwrite (const void *ptr, size_t size, size_t nitem, FILE *stream)
2919 #ifdef INTERRUPTIBLE_IO
2921 size_t items_written = 0;
2922 const char *b = (const char *) ptr;
2926 rtnval = fwrite (b, size, nitem, stream);
2929 if (ferror (stream) && errno == EINTR)
2932 return items_written;
2936 items_written += rtnval;
2938 return (items_written);
2940 return fwrite (ptr, size, nitem, stream);
2943 #endif /* ENCAPSULATE_FWRITE */
2946 /********************* directory calls *******************/
2948 #ifdef ENCAPSULATE_CHDIR
2950 sys_chdir (const char *path)
2952 PATHNAME_CONVERT_OUT (path);
2953 return chdir (path);
2955 #endif /* ENCAPSULATE_CHDIR */
2958 #ifdef ENCAPSULATE_MKDIR
2960 sys_mkdir (const char *path, mode_t mode)
2962 PATHNAME_CONVERT_OUT (path);
2964 return mkdir (path);
2966 return mkdir (path, mode);
2969 #endif /* ENCAPSULATE_MKDIR */
2972 #ifdef ENCAPSULATE_OPENDIR
2974 sys_opendir (const char *filename)
2977 PATHNAME_CONVERT_OUT (filename);
2979 while (!(rtnval = opendir (filename))
2980 && (errno == EINTR))
2984 #endif /* ENCAPSULATE_OPENDIR */
2987 #ifdef ENCAPSULATE_READDIR
2989 sys_readdir (DIR *dirp)
2993 /* Apparently setting errno is necessary on some systems?
2994 Maybe readdir() doesn't always set errno ?! */
2995 while (!(errno = 0, rtnval = readdir (dirp))
2996 && (errno == EINTR))
3001 if (rtnval == NULL) /* End of directory */
3004 Extcount external_len;
3005 int ascii_filename_p = 1;
3006 const Extbyte * const external_name = (const Extbyte *) rtnval->d_name;
3008 /* Optimize for the common all-ASCII case, computing len en passant */
3009 for (external_len = 0; external_name[external_len] ; external_len++)
3011 if (!BYTE_ASCII_P (external_name[external_len]))
3012 ascii_filename_p = 0;
3014 if (ascii_filename_p)
3017 { /* Non-ASCII filename */
3018 static Bufbyte_dynarr *internal_DIRENTRY;
3019 const Bufbyte *internal_name;
3020 Bytecount internal_len;
3021 if (!internal_DIRENTRY)
3022 internal_DIRENTRY = Dynarr_new (Bufbyte);
3024 Dynarr_reset (internal_DIRENTRY);
3026 Dynarr_add_many (internal_DIRENTRY, (Bufbyte *) rtnval,
3027 offsetof (DIRENTRY, d_name));
3029 TO_INTERNAL_FORMAT (DATA, (external_name, external_len),
3030 ALLOCA, (internal_name, internal_len),
3033 Dynarr_add_many (internal_DIRENTRY, internal_name, internal_len);
3034 Dynarr_add (internal_DIRENTRY, 0); /* zero-terminate */
3035 return (DIRENTRY *) Dynarr_atp (internal_DIRENTRY, 0);
3040 #endif /* ENCAPSULATE_READDIR */
3043 #ifdef ENCAPSULATE_CLOSEDIR
3045 sys_closedir (DIR *dirp)
3049 while ((rtnval = closedir (dirp)) == -1
3050 && (errno == EINTR))
3054 #endif /* ENCAPSULATE_CLOSEDIR */
3057 #ifdef ENCAPSULATE_RMDIR
3059 sys_rmdir (const char *path)
3061 PATHNAME_CONVERT_OUT (path);
3062 return rmdir (path);
3064 #endif /* ENCAPSULATE_RMDIR */
3067 /***************** file-information calls ******************/
3069 #ifdef ENCAPSULATE_ACCESS
3071 sys_access (const char *path, int mode)
3073 PATHNAME_CONVERT_OUT (path);
3074 return access (path, mode);
3076 #endif /* ENCAPSULATE_ACCESS */
3080 #ifdef ENCAPSULATE_EACCESS
3082 sys_eaccess (const char *path, int mode)
3084 PATHNAME_CONVERT_OUT (path);
3085 return eaccess (path, mode);
3087 #endif /* ENCAPSULATE_EACCESS */
3088 #endif /* HAVE_EACCESS */
3091 #ifdef ENCAPSULATE_LSTAT
3093 sys_lstat (const char *path, struct stat *buf)
3095 PATHNAME_CONVERT_OUT (path);
3096 return lstat (path, buf);
3098 #endif /* ENCAPSULATE_LSTAT */
3101 #ifdef ENCAPSULATE_READLINK
3103 sys_readlink (const char *path, char *buf, size_t bufsiz)
3105 PATHNAME_CONVERT_OUT (path);
3106 /* #### currently we don't do conversions on the incoming data */
3107 return readlink (path, buf, bufsiz);
3109 #endif /* ENCAPSULATE_READLINK */
3112 #ifdef ENCAPSULATE_FSTAT
3114 sys_fstat (int fd, struct stat *buf)
3116 return fstat (fd, buf);
3118 #endif /* ENCAPSULATE_FSTAT */
3121 #ifdef ENCAPSULATE_STAT
3123 sys_stat (const char *path, struct stat *buf)
3125 PATHNAME_CONVERT_OUT (path);
3126 return stat (path, buf);
3128 #endif /* ENCAPSULATE_STAT */
3131 /****************** file-manipulation calls *****************/
3133 #ifdef ENCAPSULATE_CHMOD
3135 sys_chmod (const char *path, mode_t mode)
3137 PATHNAME_CONVERT_OUT (path);
3138 return chmod (path, mode);
3140 #endif /* ENCAPSULATE_CHMOD */
3143 #ifdef ENCAPSULATE_CREAT
3145 sys_creat (const char *path, mode_t mode)
3147 PATHNAME_CONVERT_OUT (path);
3148 return creat (path, mode);
3150 #endif /* ENCAPSULATE_CREAT */
3153 #ifdef ENCAPSULATE_LINK
3155 sys_link (const char *existing, const char *new)
3157 PATHNAME_CONVERT_OUT (existing);
3158 PATHNAME_CONVERT_OUT (new);
3159 return link (existing, new);
3161 #endif /* ENCAPSULATE_LINK */
3164 #ifdef ENCAPSULATE_RENAME
3166 sys_rename (const char *old, const char *new)
3168 PATHNAME_CONVERT_OUT (old);
3169 PATHNAME_CONVERT_OUT (new);
3171 /* Windows rename fails if NEW exists */
3172 if (rename (old, new) == 0)
3174 if (errno != EEXIST)
3177 #endif /* WINDOWSNT */
3178 return rename (old, new);
3180 #endif /* ENCAPSULATE_RENAME */
3183 #ifdef ENCAPSULATE_SYMLINK
3185 sys_symlink (const char *name1, const char *name2)
3187 PATHNAME_CONVERT_OUT (name1);
3188 PATHNAME_CONVERT_OUT (name2);
3189 return symlink (name1, name2);
3191 #endif /* ENCAPSULATE_SYMLINK */
3194 #ifdef ENCAPSULATE_UNLINK
3196 sys_unlink (const char *path)
3198 PATHNAME_CONVERT_OUT (path);
3199 return unlink (path);
3201 #endif /* ENCAPSULATE_UNLINK */
3204 #ifdef ENCAPSULATE_EXECVP
3206 sys_execvp (const char *path, char * const * argv)
3211 PATHNAME_CONVERT_OUT (path);
3212 for (argc = 0; argv[argc]; argc++)
3214 new_argv = alloca_array (char *, argc + 1);
3215 for (i = 0; i < argc; i++)
3217 new_argv[i] = argv[i];
3218 PATHNAME_CONVERT_OUT (new_argv[i]);
3220 new_argv[argc] = NULL;
3221 return execvp (path, new_argv);
3223 #endif /* ENCAPSULATE_EXECVP */
3226 /************************************************************************/
3227 /* Emulations of missing system calls */
3228 /************************************************************************/
3230 /***** (these are primarily required for USG, it seems) *****/
3234 getcwd (char *pathname, size_t size)
3236 return getwd (pathname);
3238 #endif /* emulate getcwd */
3243 * Warning, this function may not duplicate BSD 4.2 action properly
3244 * under error conditions.
3249 getwd (char *pathname)
3251 char *npath, *spath;
3252 #if !__STDC__ && !defined(STDC_HEADERS)
3253 extern char *getcwd ();
3256 spath = npath = getcwd ((char *) 0, MAXPATHLEN);
3259 /* On Altos 3068, getcwd can return @hostname/dir, so discard
3260 up to first slash. Should be harmless on other systems. */
3261 while (*npath && *npath != '/')
3263 strcpy (pathname, npath);
3264 xfree (spath); /* getcwd uses malloc */
3267 #endif /* HAVE_GETWD */
3268 #endif /* 0 - mrb */
3271 * Emulate rename using unlink/link. Note that this is
3272 * only partially correct. Also, doesn't enforce restriction
3273 * that files be of same type (regular->regular, dir->dir, etc).
3278 rename (const char *from, const char *to)
3280 if (access (from, 0) == 0)
3283 if (link (from, to) == 0)
3284 if (unlink (from) == 0)
3289 #endif /* HAVE_RENAME */
3294 /* HPUX curses library references perror, but as far as we know
3295 it won't be called. Anyway this definition will do for now. */
3301 #endif /* not HAVE_PERROR */
3307 * Emulate BSD dup2. First close newd if it already exists.
3308 * Then, attempt to dup oldd. If not successful, call dup2 recursively
3309 * until we are, then close the unsuccessful ones.
3313 dup2 (int oldd, int newd)
3320 fd = fcntl (oldd, F_DUPFD, newd);
3322 error ("can't dup2 (%i,%i) : %s", oldd, newd, strerror (errno));
3329 ret = dup2 (old, new);
3332 #endif /* F_DUPFD */
3335 #endif /* not HAVE_DUP2 */
3338 * Gettimeofday. Simulate as much as possible. Only accurate
3339 * to nearest second. Emacs doesn't use tzp so ignore it for now.
3342 #if !defined (HAVE_GETTIMEOFDAY)
3345 gettimeofday (struct timeval *tp, struct timezone *tzp)
3347 extern long time ();
3349 tp->tv_sec = time ((long *)0);
3352 tzp->tz_minuteswest = -1;
3356 #endif /* !HAVE_GETTIMEOFDAY */
3358 /* No need to encapsulate utime and utimes explicitly because all
3359 access to those functions goes through the following. */
3362 set_file_times (char *filename, EMACS_TIME atime, EMACS_TIME mtime)
3365 struct timeval tv[2];
3368 return utimes (filename, tv);
3369 #else /* not HAVE_UTIMES */
3371 utb.actime = EMACS_SECS (atime);
3372 utb.modtime = EMACS_SECS (mtime);
3373 return utime (filename, &utb);
3374 #endif /* not HAVE_UTIMES */
3379 static long ticks_per_second;
3380 static long orig_user_ticks, orig_system_ticks;
3381 EMACS_TIME orig_real_time;
3383 static int process_times_available;
3385 /* Return the relative user and system tick count. We try to
3386 maintain calculations in terms of integers as long as possible
3387 for increased accuracy. */
3390 get_process_times_1 (long *user_ticks, long *system_ticks)
3392 #if defined (_SC_CLK_TCK) || defined (CLK_TCK) && !defined(WINDOWSNT)
3393 /* We have the POSIX times() function available. */
3396 *user_ticks = (long) tttt.tms_utime;
3397 *system_ticks = (long) tttt.tms_stime;
3399 #elif defined (CLOCKS_PER_SEC)
3400 *user_ticks = (long) clock ();
3409 init_process_times_very_early (void)
3411 #if defined (_SC_CLK_TCK)
3412 ticks_per_second = sysconf (_SC_CLK_TCK);
3413 #elif defined (CLK_TCK)
3414 ticks_per_second = CLK_TCK;
3415 #elif defined (CLOCKS_PER_SEC)
3416 ticks_per_second = CLOCKS_PER_SEC;
3419 process_times_available = get_process_times_1 (&orig_user_ticks,
3420 &orig_system_ticks);
3421 EMACS_GET_TIME (orig_real_time);
3424 /* Return the user and system times used up by this process so far. */
3426 get_process_times (double *user_time, double *system_time, double *real_time)
3428 EMACS_TIME curr_real_time;
3429 EMACS_TIME elapsed_time;
3430 long curr_user_ticks, curr_system_ticks;
3432 EMACS_GET_TIME (curr_real_time);
3433 EMACS_SUB_TIME (elapsed_time, curr_real_time, orig_real_time);
3434 *real_time = (EMACS_SECS (elapsed_time)
3435 + ((double) EMACS_USECS (elapsed_time)) / 1000000);
3436 if (get_process_times_1 (&curr_user_ticks, &curr_system_ticks))
3438 *user_time = (((double) (curr_user_ticks - orig_user_ticks))
3439 / ticks_per_second);
3440 *system_time = (((double) (curr_system_ticks - orig_system_ticks))
3441 / ticks_per_second);
3446 *user_time = *real_time;
3457 /* Figure out how many bits the system's random number generator uses.
3458 `random' and `lrand48' are assumed to return 31 usable bits.
3459 BSD `rand' returns a 31 bit value but the low order bits are unusable;
3460 so we'll shift it and treat it like the 15-bit USG `rand'. */
3464 # define RAND_BITS 31
3465 # else /* !HAVE_RANDOM */
3466 # ifdef HAVE_LRAND48
3467 # define RAND_BITS 31
3468 # define random lrand48
3469 # else /* !HAVE_LRAND48 */
3470 # define RAND_BITS 15
3471 # if RAND_MAX == 32767
3472 # define random rand
3473 # else /* RAND_MAX != 32767 */
3474 # if RAND_MAX == 2147483647
3475 # define random() (rand () >> 16)
3476 # else /* RAND_MAX != 2147483647 */
3478 # define random rand
3480 # define random() (rand () >> 16)
3482 # endif /* RAND_MAX != 2147483647 */
3483 # endif /* RAND_MAX != 32767 */
3484 # endif /* !HAVE_LRAND48 */
3485 # endif /* !HAVE_RANDOM */
3486 #endif /* !RAND_BITS */
3488 void seed_random (long arg);
3490 seed_random (long arg)
3493 srandom ((unsigned int)arg);
3495 # ifdef HAVE_LRAND48
3498 srand ((unsigned int)arg);
3504 * Build a full Emacs-sized word out of whatever we've got.
3505 * This suffices even for a 64-bit architecture with a 15-bit rand.
3507 long get_random (void);
3511 long val = random ();
3512 #if VALBITS > RAND_BITS
3513 val = (val << RAND_BITS) ^ random ();
3514 #if VALBITS > 2*RAND_BITS
3515 val = (val << RAND_BITS) ^ random ();
3516 #if VALBITS > 3*RAND_BITS
3517 val = (val << RAND_BITS) ^ random ();
3518 #if VALBITS > 4*RAND_BITS
3519 val = (val << RAND_BITS) ^ random ();
3520 #endif /* need at least 5 */
3521 #endif /* need at least 4 */
3522 #endif /* need at least 3 */
3523 #endif /* need at least 2 */
3524 return val & ((1L << VALBITS) - 1);
3528 /************************************************************************/
3529 /* Strings corresponding to defined signals */
3530 /************************************************************************/
3532 #if !defined (SYS_SIGLIST_DECLARED) && !defined (HAVE_SYS_SIGLIST)
3534 #if defined(WINDOWSNT) || defined(__CYGWIN32__)
3535 const char *sys_siglist[] =
3541 "illegal instruction",
3545 "floating point exception",
3548 "segmentation violation",
3549 "bad argument to system call",
3550 "write on a pipe with no one to read it",
3552 "software termination signal from kill",
3554 "sendable stop signal not from tty",
3555 "stop signal from tty",
3556 "continue a stopped process",
3557 "child status has changed",
3558 "background read attempted from control tty",
3559 "background write attempted from control tty",
3560 "input record available at control tty",
3561 "exceeded CPU time limit",
3562 "exceeded file size limit"
3568 const char *sys_siglist[NSIG + 1] =
3570 /* AIX has changed the signals a bit */
3571 DEFER_GETTEXT ("bogus signal"), /* 0 */
3572 DEFER_GETTEXT ("hangup"), /* 1 SIGHUP */
3573 DEFER_GETTEXT ("interrupt"), /* 2 SIGINT */
3574 DEFER_GETTEXT ("quit"), /* 3 SIGQUIT */
3575 DEFER_GETTEXT ("illegal instruction"), /* 4 SIGILL */
3576 DEFER_GETTEXT ("trace trap"), /* 5 SIGTRAP */
3577 DEFER_GETTEXT ("IOT instruction"), /* 6 SIGIOT */
3578 DEFER_GETTEXT ("crash likely"), /* 7 SIGDANGER */
3579 DEFER_GETTEXT ("floating point exception"), /* 8 SIGFPE */
3580 DEFER_GETTEXT ("kill"), /* 9 SIGKILL */
3581 DEFER_GETTEXT ("bus error"), /* 10 SIGBUS */
3582 DEFER_GETTEXT ("segmentation violation"), /* 11 SIGSEGV */
3583 DEFER_GETTEXT ("bad argument to system call"), /* 12 SIGSYS */
3584 DEFER_GETTEXT ("write on a pipe with no one to read it"), /* 13 SIGPIPE */
3585 DEFER_GETTEXT ("alarm clock"), /* 14 SIGALRM */
3586 DEFER_GETTEXT ("software termination signum"), /* 15 SIGTERM */
3587 DEFER_GETTEXT ("user defined signal 1"), /* 16 SIGUSR1 */
3588 DEFER_GETTEXT ("user defined signal 2"), /* 17 SIGUSR2 */
3589 DEFER_GETTEXT ("death of a child"), /* 18 SIGCLD */
3590 DEFER_GETTEXT ("power-fail restart"), /* 19 SIGPWR */
3591 DEFER_GETTEXT ("bogus signal"), /* 20 */
3592 DEFER_GETTEXT ("bogus signal"), /* 21 */
3593 DEFER_GETTEXT ("bogus signal"), /* 22 */
3594 DEFER_GETTEXT ("bogus signal"), /* 23 */
3595 DEFER_GETTEXT ("bogus signal"), /* 24 */
3596 DEFER_GETTEXT ("LAN I/O interrupt"), /* 25 SIGAIO */
3597 DEFER_GETTEXT ("PTY I/O interrupt"), /* 26 SIGPTY */
3598 DEFER_GETTEXT ("I/O intervention required"), /* 27 SIGIOINT */
3600 DEFER_GETTEXT ("HFT grant"), /* 28 SIGGRANT */
3601 DEFER_GETTEXT ("HFT retract"), /* 29 SIGRETRACT */
3602 DEFER_GETTEXT ("HFT sound done"), /* 30 SIGSOUND */
3603 DEFER_GETTEXT ("HFT input ready"), /* 31 SIGMSG */
3607 #else /* USG, not AIX */
3608 const char *sys_siglist[NSIG + 1] =
3610 DEFER_GETTEXT ("bogus signal"), /* 0 */
3611 DEFER_GETTEXT ("hangup"), /* 1 SIGHUP */
3612 DEFER_GETTEXT ("interrupt"), /* 2 SIGINT */
3613 DEFER_GETTEXT ("quit"), /* 3 SIGQUIT */
3614 DEFER_GETTEXT ("illegal instruction"), /* 4 SIGILL */
3615 DEFER_GETTEXT ("trace trap"), /* 5 SIGTRAP */
3616 DEFER_GETTEXT ("IOT instruction"), /* 6 SIGIOT */
3617 DEFER_GETTEXT ("EMT instruction"), /* 7 SIGEMT */
3618 DEFER_GETTEXT ("floating point exception"), /* 8 SIGFPE */
3619 DEFER_GETTEXT ("kill"), /* 9 SIGKILL */
3620 DEFER_GETTEXT ("bus error"), /* 10 SIGBUS */
3621 DEFER_GETTEXT ("segmentation violation"), /* 11 SIGSEGV */
3622 DEFER_GETTEXT ("bad argument to system call"), /* 12 SIGSYS */
3623 DEFER_GETTEXT ("write on a pipe with no one to read it"), /* 13 SIGPIPE */
3624 DEFER_GETTEXT ("alarm clock"), /* 14 SIGALRM */
3625 DEFER_GETTEXT ("software termination signum"), /* 15 SIGTERM */
3626 DEFER_GETTEXT ("user defined signal 1"), /* 16 SIGUSR1 */
3627 DEFER_GETTEXT ("user defined signal 2"), /* 17 SIGUSR2 */
3628 DEFER_GETTEXT ("death of a child"), /* 18 SIGCLD */
3629 DEFER_GETTEXT ("power-fail restart"), /* 19 SIGPWR */
3631 DEFER_GETTEXT ("window size changed"), /* 20 SIGWINCH */
3632 DEFER_GETTEXT ("urgent socket condition"), /* 21 SIGURG */
3633 DEFER_GETTEXT ("pollable event occurred"), /* 22 SIGPOLL */
3634 DEFER_GETTEXT ("stop (cannot be caught or ignored)"), /* 23 SIGSTOP */
3635 DEFER_GETTEXT ("user stop requested from tty"), /* 24 SIGTSTP */
3636 DEFER_GETTEXT ("stopped process has been continued"), /* 25 SIGCONT */
3637 DEFER_GETTEXT ("background tty read attempted"), /* 26 SIGTTIN */
3638 DEFER_GETTEXT ("background tty write attempted"), /* 27 SIGTTOU */
3639 DEFER_GETTEXT ("virtual timer expired"), /* 28 SIGVTALRM */
3640 DEFER_GETTEXT ("profiling timer expired"), /* 29 SIGPROF */
3641 DEFER_GETTEXT ("exceeded cpu limit"), /* 30 SIGXCPU */
3642 DEFER_GETTEXT ("exceeded file size limit"), /* 31 SIGXFSZ */
3643 DEFER_GETTEXT ("process's lwps are blocked"), /* 32 SIGWAITING */
3644 DEFER_GETTEXT ("special signal used by thread library"), /* 33 SIGLWP */
3646 DEFER_GETTEXT ("special signal used by CPR"), /* 34 SIGFREEZE */
3649 DEFER_GETTEXT ("special signal used by CPR"), /* 35 SIGTHAW */
3654 #endif /* not AIX */
3657 const char *sys_siglist[NSIG + 1] =
3659 DEFER_GETTEXT ("null signal"), /* 0 SIGNULL */
3660 DEFER_GETTEXT ("hangup"), /* 1 SIGHUP */
3661 DEFER_GETTEXT ("interrupt"), /* 2 SIGINT */
3662 DEFER_GETTEXT ("quit"), /* 3 SIGQUIT */
3663 DEFER_GETTEXT ("illegal instruction"), /* 4 SIGILL */
3664 DEFER_GETTEXT ("trace trap"), /* 5 SIGTRAP */
3665 DEFER_GETTEXT ("abort termination"), /* 6 SIGABRT */
3666 DEFER_GETTEXT ("SIGEMT"), /* 7 SIGEMT */
3667 DEFER_GETTEXT ("floating point exception"), /* 8 SIGFPE */
3668 DEFER_GETTEXT ("kill"), /* 9 SIGKILL */
3669 DEFER_GETTEXT ("bus error"), /* 10 SIGBUS */
3670 DEFER_GETTEXT ("segmentation violation"), /* 11 SIGSEGV */
3671 DEFER_GETTEXT ("bad argument to system call"), /* 12 SIGSYS */
3672 DEFER_GETTEXT ("write on a pipe with no reader"), /* 13 SIGPIPE */
3673 DEFER_GETTEXT ("alarm clock"), /* 14 SIGALRM */
3674 DEFER_GETTEXT ("software termination signal"), /* 15 SIGTERM */
3675 DEFER_GETTEXT ("user defined signal 1"), /* 16 SIGUSR1 */
3676 DEFER_GETTEXT ("user defined signal 2"), /* 17 SIGUSR2 */
3677 DEFER_GETTEXT ("child stopped or terminated"), /* 18 SIGCLD */
3678 DEFER_GETTEXT ("power-fail restart"), /* 19 SIGPWR */
3679 DEFER_GETTEXT ("window size changed"), /* 20 SIGWINCH */
3680 DEFER_GETTEXT ("undefined"), /* 21 */
3681 DEFER_GETTEXT ("pollable event occurred"), /* 22 SIGPOLL */
3682 DEFER_GETTEXT ("sendable stop signal not from tty"), /* 23 SIGSTOP */
3683 DEFER_GETTEXT ("stop signal from tty"), /* 24 SIGSTP */
3684 DEFER_GETTEXT ("continue a stopped process"), /* 25 SIGCONT */
3685 DEFER_GETTEXT ("attempted background tty read"), /* 26 SIGTTIN */
3686 DEFER_GETTEXT ("attempted background tty write"), /* 27 SIGTTOU */
3687 DEFER_GETTEXT ("undefined"), /* 28 */
3688 DEFER_GETTEXT ("undefined"), /* 29 */
3689 DEFER_GETTEXT ("undefined"), /* 30 */
3690 DEFER_GETTEXT ("undefined"), /* 31 */
3691 DEFER_GETTEXT ("undefined"), /* 32 */
3692 DEFER_GETTEXT ("socket (TCP/IP) urgent data arrival"), /* 33 SIGURG */
3693 DEFER_GETTEXT ("I/O is possible"), /* 34 SIGIO */
3694 DEFER_GETTEXT ("exceeded cpu time limit"), /* 35 SIGXCPU */
3695 DEFER_GETTEXT ("exceeded file size limit"), /* 36 SIGXFSZ */
3696 DEFER_GETTEXT ("virtual time alarm"), /* 37 SIGVTALRM */
3697 DEFER_GETTEXT ("profiling time alarm"), /* 38 SIGPROF */
3698 DEFER_GETTEXT ("undefined"), /* 39 */
3699 DEFER_GETTEXT ("file record locks revoked"), /* 40 SIGLOST */
3700 DEFER_GETTEXT ("undefined"), /* 41 */
3701 DEFER_GETTEXT ("undefined"), /* 42 */
3702 DEFER_GETTEXT ("undefined"), /* 43 */
3703 DEFER_GETTEXT ("undefined"), /* 44 */
3704 DEFER_GETTEXT ("undefined"), /* 45 */
3705 DEFER_GETTEXT ("undefined"), /* 46 */
3706 DEFER_GETTEXT ("undefined"), /* 47 */
3707 DEFER_GETTEXT ("undefined"), /* 48 */
3708 DEFER_GETTEXT ("undefined"), /* 49 */
3709 DEFER_GETTEXT ("undefined"), /* 50 */
3710 DEFER_GETTEXT ("undefined"), /* 51 */
3711 DEFER_GETTEXT ("undefined"), /* 52 */
3712 DEFER_GETTEXT ("undefined"), /* 53 */
3713 DEFER_GETTEXT ("undefined"), /* 54 */
3714 DEFER_GETTEXT ("undefined"), /* 55 */
3715 DEFER_GETTEXT ("undefined"), /* 56 */
3716 DEFER_GETTEXT ("undefined"), /* 57 */
3717 DEFER_GETTEXT ("undefined"), /* 58 */
3718 DEFER_GETTEXT ("undefined"), /* 59 */
3719 DEFER_GETTEXT ("undefined"), /* 60 */
3720 DEFER_GETTEXT ("undefined"), /* 61 */
3721 DEFER_GETTEXT ("undefined"), /* 62 */
3722 DEFER_GETTEXT ("undefined"), /* 63 */
3723 DEFER_GETTEXT ("notification message in mess. queue"), /* 64 SIGDGNOTIFY */
3728 #endif /* ! SYS_SIGLIST_DECLARED && ! HAVE_SYS_SIGLIST */
3731 /************************************************************************/
3732 /* Directory routines for systems that don't have them */
3733 /************************************************************************/
3735 #ifdef SYSV_SYSTEM_DIR
3739 #if defined(BROKEN_CLOSEDIR) || !defined(HAVE_CLOSEDIR)
3741 closedir (DIR *dirp) /* stream from opendir */
3745 rtnval = sys_close (dirp->dd_fd);
3747 /* Some systems (like Solaris) allocate the buffer and the DIR all
3748 in one block. Why in the world are we freeing this ourselves
3750 #if ! (defined (sun) && defined (USG5_4))
3751 xfree ((char *) dirp->dd_buf); /* directory block defined in <dirent.h> */
3753 xfree ((char *) dirp);
3756 #endif /* BROKEN_CLOSEDIR or not HAVE_CLOSEDIR */
3757 #endif /* SYSV_SYSTEM_DIR */
3759 #ifdef NONSYSTEM_DIR_LIBRARY
3762 opendir (const char *filename) /* name of directory */
3764 DIR *dirp; /* -> malloc'ed storage */
3765 int fd; /* file descriptor for read */
3766 struct stat sbuf; /* result of fstat */
3768 fd = sys_open (filename, O_RDONLY);
3772 if (fstat (fd, &sbuf) < 0
3773 || (sbuf.st_mode & S_IFMT) != S_IFDIR
3774 || (dirp = (DIR *) malloc (sizeof (DIR))) == 0)
3777 return 0; /* bad luck today */
3781 dirp->dd_loc = dirp->dd_size = 0; /* refill needed */
3787 closedir (DIR *dirp) /* stream from opendir */
3789 sys_close (dirp->dd_fd);
3797 ino_t od_ino; /* inode */
3798 char od_name[DIRSIZ]; /* filename */
3801 static struct direct dir_static; /* simulated directory contents */
3805 readdir (DIR *dirp) /* stream from opendir */
3807 struct olddir *dp; /* -> directory data */
3811 if (dirp->dd_loc >= dirp->dd_size)
3812 dirp->dd_loc = dirp->dd_size = 0;
3814 if (dirp->dd_size == 0 /* refill buffer */
3815 && (dirp->dd_size = sys_read (dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ)) <= 0)
3818 dp = (struct olddir *) &dirp->dd_buf[dirp->dd_loc];
3819 dirp->dd_loc += sizeof (struct olddir);
3821 if (dp->od_ino != 0) /* not deleted entry */
3823 dir_static.d_ino = dp->od_ino;
3824 strncpy (dir_static.d_name, dp->od_name, DIRSIZ);
3825 dir_static.d_name[DIRSIZ] = '\0';
3826 dir_static.d_namlen = strlen (dir_static.d_name);
3827 dir_static.d_reclen = sizeof (struct direct)
3829 + dir_static.d_namlen - dir_static.d_namlen % 4;
3830 return &dir_static; /* -> simulated structure */
3836 #endif /* NONSYSTEM_DIR_LIBRARY */
3839 /* mkdir and rmdir functions, for systems which don't have them. */
3843 * Written by Robert Rother, Mariah Corporation, August 1985.
3845 * If you want it, it's yours. All I ask in return is that if you
3846 * figure out how to do this in a Bourne Shell script you send me
3848 * sdcsvax!rmr or rmr@uscd
3850 * Severely hacked over by John Gilmore to make a 4.2BSD compatible
3851 * subroutine. 11Mar86; hoptoad!gnu
3853 * Modified by rmtodd@uokmax 6-28-87 -- when making an already existing dir,
3854 * subroutine didn't return EEXIST. It does now.
3860 #ifdef MKDIR_PROTOTYPE
3864 mkdir (const char *dpath, int dmode)
3867 int cpid, status, fd;
3868 struct stat statbuf;
3870 if (stat (dpath, &statbuf) == 0)
3872 errno = EEXIST; /* Stat worked, so it already exists */
3876 /* If stat fails for a reason other than non-existence, return error */
3877 if (errno != ENOENT)
3880 synch_process_alive = 1;
3881 switch (cpid = fork ())
3884 case -1: /* Error in fork() */
3885 return -1; /* Errno is set already */
3887 case 0: /* Child process */
3890 * Cheap hack to set mode of new directory. Since this
3891 * child process is going away anyway, we zap its umask.
3892 * ####, this won't suffice to set SUID, SGID, etc. on this
3893 * directory. Does anybody care?
3895 status = umask (0); /* Get current umask */
3896 status = umask (status | (0777 & ~dmode)); /* Set for mkdir */
3897 fd = sys_open ("/dev/null", O_RDWR);
3900 if (fd != STDIN_FILENO) dup2 (fd, STDIN_FILENO);
3901 if (fd != STDOUT_FILENO) dup2 (fd, STDOUT_FILENO);
3902 if (fd != STDERR_FILENO) dup2 (fd, STDERR_FILENO);
3904 execl ("/bin/mkdir", "mkdir", dpath, (char *) 0);
3905 _exit (-1); /* Can't exec /bin/mkdir */
3908 default: /* Parent process */
3909 wait_for_termination (cpid);
3912 if (synch_process_death != 0 || synch_process_retcode != 0)
3914 errno = EIO; /* We don't know why, but */
3915 return -1; /* /bin/mkdir failed */
3920 #endif /* not HAVE_MKDIR */
3924 rmdir (const char *dpath)
3926 int cpid, status, fd;
3927 struct stat statbuf;
3929 if (stat (dpath, &statbuf) != 0)
3931 /* Stat just set errno. We don't have to */
3935 synch_process_alive = 1;
3936 switch (cpid = fork ())
3939 case -1: /* Error in fork() */
3940 return (-1); /* Errno is set already */
3942 case 0: /* Child process */
3943 fd = sys_open("/dev/null", O_RDWR);
3946 if (fd != STDIN_FILENO) dup2 (fd, STDIN_FILENO);
3947 if (fd != STDOUT_FILENO) dup2 (fd, STDOUT_FILENO);
3948 if (fd != STDERR_FILENO) dup2 (fd, STDERR_FILENO);
3950 execl ("/bin/rmdir", "rmdir", dpath, (char *) 0);
3951 _exit (-1); /* Can't exec /bin/mkdir */
3953 default: /* Parent process */
3954 wait_for_termination (cpid);
3957 if (synch_process_death != 0 ||
3958 synch_process_retcode != 0)
3960 errno = EIO; /* We don't know why, but */
3961 return -1; /* /bin/rmdir failed */
3966 #endif /* !HAVE_RMDIR */
3969 /************************************************************************/
3970 /* Misc. SunOS crap */
3971 /************************************************************************/
3975 /* These are included on Sunos 4.1 when we do not use shared libraries.
3976 X11 libraries may refer to these functions but (we hope) do not
3977 actually call them. */
3997 #endif /* USE_DL_STUBS */
4001 #ifndef HAVE_STRCASECMP
4005 static unsigned char charmap[] = {
4006 '\000', '\001', '\002', '\003', '\004', '\005', '\006', '\007',
4007 '\010', '\011', '\012', '\013', '\014', '\015', '\016', '\017',
4008 '\020', '\021', '\022', '\023', '\024', '\025', '\026', '\027',
4009 '\030', '\031', '\032', '\033', '\034', '\035', '\036', '\037',
4010 '\040', '\041', '\042', '\043', '\044', '\045', '\046', '\047',
4011 '\050', '\051', '\052', '\053', '\054', '\055', '\056', '\057',
4012 '\060', '\061', '\062', '\063', '\064', '\065', '\066', '\067',
4013 '\070', '\071', '\072', '\073', '\074', '\075', '\076', '\077',
4014 '\100', '\141', '\142', '\143', '\144', '\145', '\146', '\147',
4015 '\150', '\151', '\152', '\153', '\154', '\155', '\156', '\157',
4016 '\160', '\161', '\162', '\163', '\164', '\165', '\166', '\167',
4017 '\170', '\171', '\172', '\133', '\134', '\135', '\136', '\137',
4018 '\140', '\141', '\142', '\143', '\144', '\145', '\146', '\147',
4019 '\150', '\151', '\152', '\153', '\154', '\155', '\156', '\157',
4020 '\160', '\161', '\162', '\163', '\164', '\165', '\166', '\167',
4021 '\170', '\171', '\172', '\173', '\174', '\175', '\176', '\177',
4022 '\200', '\201', '\202', '\203', '\204', '\205', '\206', '\207',
4023 '\210', '\211', '\212', '\213', '\214', '\215', '\216', '\217',
4024 '\220', '\221', '\222', '\223', '\224', '\225', '\226', '\227',
4025 '\230', '\231', '\232', '\233', '\234', '\235', '\236', '\237',
4026 '\240', '\241', '\242', '\243', '\244', '\245', '\246', '\247',
4027 '\250', '\251', '\252', '\253', '\254', '\255', '\256', '\257',
4028 '\260', '\261', '\262', '\263', '\264', '\265', '\266', '\267',
4029 '\270', '\271', '\272', '\273', '\274', '\275', '\276', '\277',
4030 '\300', '\301', '\302', '\303', '\304', '\305', '\306', '\307',
4031 '\310', '\311', '\312', '\313', '\314', '\315', '\316', '\317',
4032 '\320', '\321', '\322', '\323', '\324', '\325', '\326', '\327',
4033 '\330', '\331', '\332', '\333', '\334', '\335', '\336', '\337',
4034 '\340', '\341', '\342', '\343', '\344', '\345', '\346', '\347',
4035 '\350', '\351', '\352', '\353', '\354', '\355', '\356', '\357',
4036 '\360', '\361', '\362', '\363', '\364', '\365', '\366', '\367',
4037 '\370', '\371', '\372', '\373', '\374', '\375', '\376', '\377',
4041 strcasecmp (char *s1, char *s2)
4043 unsigned char *cm = charmap;
4044 unsigned char *us1 = (unsigned char *) s1;
4045 unsigned char *us2 = (unsigned char *)s2;
4047 while (cm[*us1] == cm[*us2++])
4051 return (cm[*us1] - cm[*--us2]);
4053 #endif /* !HAVE_STRCASECMP */