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.
4 Copyright (C) 2007 Sebastian Freundt
6 This file is part of SXEmacs
8 SXEmacs is free software: you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation, either version 3 of the License, or
11 (at your option) any later version.
13 SXEmacs is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>. */
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
36 /* ------------------------------- */
38 /* ------------------------------- */
41 #include "ui/TTY/console-tty.h" /* for stuff in stuff_char and
42 others. Seriously in need of
45 #include "syssignal.h" /* always include before systty.h */
46 #include "ui/TTY/systty.h"
49 #include "ui/console-stream.h"
52 #include "events/events.h"
54 #include "ui/redisplay.h"
57 #include "ui/window.h"
60 #ifdef HAVE_LIBGEN_H /* Must come before sysfile.h */
70 #include <sys/times.h>
72 /* ------------------------------- */
74 /* ------------------------------- */
77 #include <sys/utsname.h>
78 #if defined (TIOCGWINSZ) || defined (ISC4_0)
80 #include <sys/sioctl.h>
83 #include <sys/stream.h>
86 #endif /* TIOCGWINSZ or ISC4_0 */
89 /* LPASS8 is new in 4.3, and makes cbreak mode provide all 8 bits. */
100 static int baud_convert[] =
105 0, 50, 75, 110, 135, 150, 200, 300, 600, 1200,
106 1800, 2400, 4800, 9600, 19200, 38400
113 static void hft_init(struct console *c);
114 static void hft_reset(struct console *c);
115 #include <sys/termio.h>
118 /************************************************************************/
119 /* subprocess control */
120 /************************************************************************/
126 /* Arrange for character C to be read as the next input from
128 void stuff_char(struct console *con, int c)
132 assert(CONSOLE_TTY_P(con));
133 input_fd = CONSOLE_TTY_DATA(con)->infd;
134 /* Should perhaps error if in batch mode */
136 ioctl(input_fd, TIOCSTI, &c);
137 #else /* no TIOCSTI */
139 ("Cannot stuff terminal input characters in this version of Unix.");
140 #endif /* no TIOCSTI */
145 #endif /* HAVE_TTY */
147 void set_exclusive_use(int fd)
150 ioctl(fd, FIOCLEX, 0);
152 /* Ok to do nothing if this feature does not exist */
155 void set_descriptor_non_blocking(int fd)
157 /* Stride people say it's a mystery why this is needed
158 as well as the O_NDELAY, but that it fails without this. */
159 /* For AIX: Apparently need this for non-blocking reads on sockets.
160 It seems that O_NONBLOCK applies only to FIFOs? From
161 lowry@watson.ibm.com (Andy Lowry). */
162 /* #### Should this be conditionalized on FIONBIO? */
163 #if defined (STRIDE) || (defined (pfa) && defined (HAVE_PTYS)) || defined (AIX)
166 ioctl(fd, FIONBIO, &one);
171 fcntl(fd, F_SETFL, O_NONBLOCK);
175 #if defined (NO_SUBPROCESSES)
178 void wait_without_blocking(void)
180 wait3(0, WNOHANG | WUNTRACED, 0);
181 synch_process_alive = 0;
185 #endif /* NO_SUBPROCESSES */
187 void wait_for_termination(int pid)
189 /* #### With the new improved SIGCHLD handling stuff, there is much
190 less danger of race conditions and some of the comments below
191 don't apply. This should be updated. */
193 #if defined (NO_SUBPROCESSES)
195 /* No need to be tricky like below; we can just call wait(). */
196 /* #### should figure out how to write a wait_allowing_quit().
197 Since hardly any systems don't have subprocess support,
198 however, there doesn't seem to be much point. */
202 #elif defined (HAVE_WAITPID)
203 /* Note that, whenever any subprocess terminates (asynch. or synch.),
204 the SIGCHLD handler will be called and it will call wait(). Thus
205 we cannot just call wait() ourselves, and we can't block SIGCHLD
206 and then call wait(), because then if an asynch. process dies
207 while we're waiting for our synch. process, Emacs will never
208 notice that the asynch. process died.
210 So, the general approach we take is to repeatedly block until a
211 signal arrives, and then check if our process died using kill
212 (pid, 0). (We could also check the value of `synch_process_alive',
213 since the SIGCHLD handler will reset that and we know that we're
214 only being called on synchronous processes, but this approach is
215 safer. I don't trust the proper delivery of SIGCHLD.
217 Note also that we cannot use any form of waitpid(). A loop with
218 WNOHANG will chew up CPU time; better to use sleep(). A loop
219 without WNOWAIT will screw up the SIGCHLD handler (actually this
220 is not true, if you duplicate the exit-status-reaping code; see
221 below). A loop with WNOWAIT will result in a race condition if
222 the process terminates between the process-status check and the
223 call to waitpid(). */
225 /* Formerly, immediate_quit was set around this function call, but
226 that could lead to problems if the QUIT happened when SIGCHLD was
227 blocked -- it would remain blocked. Yet another reason why
228 immediate_quit is a bad idea. In any case, there is no reason to
229 resort to this because either the SIGIO or the SIGALRM will stop
230 the block in EMACS_WAIT_FOR_SIGNAL(). */
232 /* Apparently there are bugs on some systems with the second method
233 used below (the EMACS_BLOCK_SIGNAL method), whereby zombie
234 processes get left around. It appears in those cases that the
235 SIGCHLD handler is never getting invoked. It's not clear whether
236 this is an Emacs bug or a kernel bug or both: on HPUX this
237 problem is observed only with XEmacs, but under Solaris 2.4 all
238 sorts of different programs have problems with zombies. The
239 method we use here does not require a working SIGCHLD (but will
240 not break if it is working), and should be safe. */
242 We use waitpid(), contrary to the remarks above. There is no
243 race condition, because the three situations when sigchld_handler
244 is invoked should be handled OK:
246 - handler invoked before waitpid(): In this case, subprocess
247 status will be set by sigchld_handler. waitpid() here will
248 return -1 with errno set to ECHILD, which is a valid exit
251 - handler invoked during waitpid(): as above, except that errno
252 here will be set to EINTR. This will cause waitpid() to be
253 called again, and this time it will exit with ECHILD.
255 - handler invoked after waitpid(): The following code will reap
256 the subprocess. In the handler, wait() will return -1 because
257 there is no child to reap, and the handler will exit without
258 modifying child subprocess status. */
261 /* Because the SIGCHLD handler can potentially reap the synchronous
262 subprocess, we should take care of that. */
264 /* Will stay in the do loop as long as:
266 2. Ctrl-G is not pressed */
269 ret = waitpid(pid, &status, 0);
270 /* waitpid returns 0 if the process is still alive. */
272 while (ret == 0 || (ret == -1 && errno == EINTR));
276 /* Set synch process globals. This is can also happen
277 in sigchld_handler, and that code is duplicated. */
278 synch_process_alive = 0;
279 if (WIFEXITED(status))
280 synch_process_retcode = WEXITSTATUS(status);
281 else if (WIFSIGNALED(status))
282 synch_process_death = signal_name(WTERMSIG(status));
284 /* On exiting the loop, ret will be -1, with errno set to ECHILD if
285 the child has already been reaped, e.g. in the signal handler. */
287 /* Otherwise, we've had some error condition here.
288 Per POSIX, the only other possibilities are:
289 - EFAULT (bus error accessing arg 2) or
290 - EINVAL (incorrect arguments),
291 which are both program bugs.
293 Since implementations may add their own error indicators on top,
294 we ignore it by default. */
295 #elif defined (EMACS_BLOCK_SIGNAL) && !defined (BROKEN_WAIT_FOR_SIGNAL) && defined (SIGCHLD)
297 static int wait_debugging = 0; /* Set nonzero to make following
298 function work under dbx (at least for bsd). */
303 EMACS_BLOCK_SIGNAL(SIGCHLD);
304 /* Block SIGCHLD from happening during this check,
305 to avoid race conditions. */
306 if (kill(pid, 0) < 0) {
307 EMACS_UNBLOCK_SIGNAL(SIGCHLD);
310 /* WARNING: Whatever this macro does *must* not allow SIGCHLD
311 to happen between the time that it's reenabled and when we
312 begin to block. Otherwise we may end up blocking for a
313 signal that has already arrived and isn't coming again.
314 Can you say "race condition"?
316 I assume that the system calls sigpause() or sigsuspend()
317 to provide this atomicness. If you're getting hangs in
318 sigpause()/sigsuspend(), then your OS doesn't implement
319 this properly (this applies under hpux9, for example).
320 Try defining BROKEN_WAIT_FOR_SIGNAL. */
321 EMACS_WAIT_FOR_SIGNAL(SIGCHLD);
323 #else /* not HAVE_WAITPID and (not EMACS_BLOCK_SIGNAL or BROKEN_WAIT_FOR_SIGNAL) */
324 /* This approach is kind of cheesy but is guaranteed(?!) to work
328 if (kill(pid, 0) < 0)
332 #endif /* OS features */
335 #if !defined (NO_SUBPROCESSES)
338 * flush any pending output
339 * (may flush input as well; it does not matter the way we use it)
342 void flush_pending_output(int channel)
345 /* If we try this, we get hit with SIGTTIN, because
346 the child's tty belongs to the child's pgrp. */
347 #elif defined (TCFLSH)
348 ioctl(channel, TCFLSH, 1);
349 #elif defined (TIOCFLUSH)
351 /* 3rd arg should be ignored
352 but some 4.2 kernels actually want the address of an int
353 and nonzero means something different. */
354 ioctl(channel, TIOCFLUSH, &zero);
358 /* Set up the terminal at the other end of a pseudo-terminal that
359 we will be controlling an inferior through.
360 It should not echo or do line-editing, since that is done
361 in Emacs. No padding needed for insertion into an Emacs buffer. */
363 void child_setup_tty(int out)
366 emacs_get_tty(out, &s);
368 #if defined (HAVE_TERMIO) || defined (HAVE_TERMIOS)
370 s.main.c_oflag |= OPOST; /* Enable output postprocessing */
371 s.main.c_oflag &= ~ONLCR; /* Disable map of NL to CR-NL on output */
373 s.main.c_oflag &= ~(NLDLY | CRDLY | TABDLY | BSDLY | VTDLY | FFDLY);
374 /* No output delays */
376 s.main.c_lflag &= ~ECHO; /* Disable echo */
377 s.main.c_lflag |= ISIG; /* Enable signals */
379 s.main.c_iflag &= ~IUCLC; /* Disable downcasing on input. */
382 s.main.c_oflag &= ~OLCUC; /* Disable upcasing on output. */
384 s.main.c_oflag &= ~TAB3; /* Disable tab expansion */
385 #if defined (CSIZE) && defined (CS8)
386 s.main.c_cflag = (s.main.c_cflag & ~CSIZE) | CS8; /* Don't strip 8th bit */
389 s.main.c_iflag &= ~ISTRIP; /* Don't strip 8th bit on input */
392 /* Unnecessary as long as ICANON is set */
393 s.main.c_cc[VMIN] = 1; /* minimum number of characters to accept */
394 s.main.c_cc[VTIME] = 0; /* wait forever for at least 1 character */
397 s.main.c_lflag |= ICANON; /* Enable erase/kill and eof processing */
398 s.main.c_cc[VEOF] = 04; /* ensure that EOF is Control-D */
399 s.main.c_cc[VERASE] = _POSIX_VDISABLE; /* disable erase processing */
400 s.main.c_cc[VKILL] = _POSIX_VDISABLE; /* disable kill processing */
403 s.main.c_cflag = (s.main.c_cflag & ~CBAUD) | B9600; /* baud rate sanity */
408 /* AIX enhanced edit loses NULs, so disable it. */
410 s.main.c_iflag &= ~ASCEDIT;
411 #endif /* IBMR2AIX */
412 /* Also, PTY overloads NUL and BREAK.
413 don't ignore break, but don't signal either, so it looks like NUL.
414 This really serves a purpose only if running in an XTERM window
415 or via TELNET or the like, but does no harm elsewhere. */
416 s.main.c_iflag &= ~IGNBRK;
417 s.main.c_iflag &= ~BRKINT;
419 #ifdef SIGNALS_VIA_CHARACTERS
420 /* TTY `special characters' are used in process_send_signal
421 so set them here to something useful. */
422 s.main.c_cc[VQUIT] = '\\' & 037; /* Control-\ */
423 s.main.c_cc[VINTR] = 'C' & 037; /* Control-C */
424 s.main.c_cc[VSUSP] = 'Z' & 037; /* Control-Z */
425 #else /* no TIOCGPGRP or no TIOCGLTC or no TIOCGETC */
426 /* TTY `special characters' work better as signals, so disable
428 s.main.c_cc[VQUIT] = _POSIX_VDISABLE;
429 s.main.c_cc[VINTR] = _POSIX_VDISABLE;
430 s.main.c_cc[VSUSP] = _POSIX_VDISABLE;
431 s.main.c_lflag &= ~ISIG;
432 #endif /* no TIOCGPGRP or no TIOCGLTC or no TIOCGETC */
433 s.main.c_cc[VEOL] = _POSIX_VDISABLE;
435 /* <mdiers> #### This is not portable. ###
436 POSIX does not specify CBAUD, and 4.4BSD does not have it.
437 Instead, POSIX suggests to use cfset{i,o}speed().
438 [cf. D. Lewine, POSIX Programmer's Guide, Chapter 8: Terminal
439 I/O, O'Reilly 1991] */
440 s.main.c_cflag = (s.main.c_cflag & ~CBAUD) | B9600; /* baud rate sanity */
442 /* <mdiers> What to do upon failure? Just ignoring rc is probably
443 not acceptable, is it? */
444 if (cfsetispeed(&s.main, B9600) == -1) /* ignore */
446 if (cfsetospeed(&s.main, B9600) == -1) /* ignore */
448 #endif /* defined (CBAUD) */
450 #else /* not HAVE_TERMIO */
452 s.main.sg_flags &= ~(ECHO | CRMOD | ANYP | ALLDELAY | RAW | LCASE
454 s.main.sg_flags |= LPASS8;
455 s.main.sg_erase = 0377;
456 s.main.sg_kill = 0377;
457 s.lmode = LLITOUT | s.lmode; /* Don't strip 8th bit */
459 #endif /* not HAVE_TERMIO */
460 emacs_set_tty(out, &s, 0);
465 ioctl(out, FIOASYNC, &zero);
469 #endif /* not NO_SUBPROCESSES */
471 #if !defined (SIGTSTP) && !defined (USG_JOBCTRL)
473 #if defined(__STDC__) || defined(_MSC_VER)
474 #define SIG_PARAM_TYPE int
476 #define SIG_PARAM_TYPE
479 /* Record a signal code and the handler for it. */
482 SIGTYPE(*handler) (SIG_PARAM_TYPE);
485 static void save_signal_handlers(struct save_signal *saved_handlers)
487 while (saved_handlers->code) {
488 saved_handlers->handler
490 (SIGTYPE(*)(SIG_PARAM_TYPE)) signal(saved_handlers->code,
496 static void restore_signal_handlers(struct save_signal *saved_handlers)
498 while (saved_handlers->code) {
499 signal(saved_handlers->code, saved_handlers->handler);
504 /* Fork a subshell. */
505 static void sys_subshell(void)
508 struct save_signal saved_handlers[5];
510 unsigned char *str = 0;
514 saved_handlers[0].code = SIGINT;
515 saved_handlers[1].code = SIGQUIT;
516 saved_handlers[2].code = SIGTERM;
518 saved_handlers[3].code = SIGIO;
519 saved_handlers[4].code = 0;
521 saved_handlers[3].code = 0;
524 /* Mentioning current_buffer->buffer would mean including buffer.h,
525 which somehow wedges the hp compiler. So instead... */
527 if (NILP(Fboundp(Qdefault_directory)))
529 dir = Fsymbol_value(Qdefault_directory);
534 dir = Funhandled_file_name_directory(dir);
535 dir = expand_and_dir_to_file(dir, Qnil);
537 str = (unsigned char *)alloca(XSTRING_LENGTH(dir) + 2);
538 len = XSTRING_LENGTH(dir);
539 memcpy(str, XSTRING_DATA(dir), len);
540 if (!IS_ANY_SEP(str[len - 1]))
541 str[len++] = DIRECTORY_SEP;
548 error("Can't spawn subshell");
554 sh = (char *)egetenv("SHELL");
558 /* Use our buffer's default directory for the subshell. */
562 #if !defined (NO_SUBPROCESSES)
563 close_process_descs(); /* Close Emacs's pipes/ptys */
566 #ifdef SET_EMACS_PRIORITY
567 if (emacs_priority != 0)
568 nice(-emacs_priority); /* Give the new shell the default priority */
572 write(1, "Can't execute subshell", 22);
576 save_signal_handlers(saved_handlers);
577 synch_process_alive = 1;
578 wait_for_termination(pid);
579 restore_signal_handlers(saved_handlers);
581 #endif /* !defined (SIGTSTP) && !defined (USG_JOBCTRL) */
583 /* Suspend the Emacs process; give terminal to its superior. */
584 void sys_suspend(void)
586 #if defined (SIGTSTP)
588 int pgrp = EMACS_GET_PROCESS_GROUP();
589 EMACS_KILLPG(pgrp, SIGTSTP);
592 #elif defined (USG_JOBCTRL)
593 /* If you don't know what this is don't mess with it */
594 ptrace(0, 0, 0, 0); /* set for ptrace - caught by csh */
595 kill(getpid(), SIGQUIT);
597 #else /* No SIGTSTP or USG_JOBCTRL */
599 /* On a system where suspending is not implemented,
600 instead fork a subshell and let it talk directly to the terminal
607 /* Suspend a process if possible; give terminal to its superior. */
608 void sys_suspend_process(int process)
610 /* I don't doubt that it is possible to suspend processes on
611 * VMS machines or thost that use USG_JOBCTRL,
612 * but I don't know how to do it, so...
614 #if defined (SIGTSTP)
615 kill(process, SIGTSTP);
619 /* Given FD, obtain pty buffer size. When no luck, a good guess is made,
620 so that the function works even when fd is not a pty. */
622 int get_pty_max_bytes(int fd)
624 /* DEC OSF 4.0 fpathconf returns 255, but xemacs hangs on long shell
625 input lines if we return 253. 252 is OK!. So let's leave a bit
626 of slack for the newline that xemacs will insert, and for those
627 inevitable vendor off-by-one-or-two-or-three bugs. */
628 #define MAX_CANON_SLACK 10
629 #define SAFE_MAX_CANON (127 - MAX_CANON_SLACK)
630 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
632 int max_canon = fpathconf(fd, _PC_MAX_CANON);
634 /* HP-UX 10.20 fpathconf returns 768, but this results in
635 truncated input lines, while 255 works. */
639 return (max_canon < 0 ? SAFE_MAX_CANON :
641 SAFE_MAX_CANON ? max_canon -
642 MAX_CANON_SLACK : max_canon);
644 #elif defined (_POSIX_MAX_CANON)
645 return (_POSIX_MAX_CANON > SAFE_MAX_CANON ?
646 _POSIX_MAX_CANON - MAX_CANON_SLACK : _POSIX_MAX_CANON);
648 return SAFE_MAX_CANON;
652 /* Figure out the eof character for the FD. */
654 Bufbyte get_eof_char(int fd)
656 const Bufbyte ctrl_d = (Bufbyte) '\004';
665 /* What is the following line designed to do??? -mrb */
666 if (strlen((const char *)t.c_cc) < (unsigned int)(VEOF + 1))
669 return (Bufbyte) t.c_cc[VEOF];
671 return t.c_cc[VEOF] ==
672 _POSIX_VDISABLE ? ctrl_d : (Bufbyte) t.c_cc[VEOF];
674 #else /* ! HAVE_TERMIOS */
675 /* On Berkeley descendants, the following IOCTL's retrieve the
676 current control characters. */
677 #if defined (TIOCGETC)
680 ioctl(fd, TIOCGETC, &c);
681 return (Bufbyte) c.t_eofc;
683 #else /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
684 /* On SYSV descendants, the TCGETA ioctl retrieves the current control
689 ioctl(fd, TCGETA, &t);
690 if (strlen((const char *)t.c_cc) < (unsigned int)(VINTR + 1))
693 return (Bufbyte) t.c_cc[VINTR];
695 #else /* ! defined (TCGETA) */
696 /* Rather than complain, we'll just guess ^D, which is what
697 * earlier emacsen always used. */
699 #endif /* ! defined (TCGETA) */
700 #endif /* ! defined (TIOCGETC) */
701 #endif /* ! defined (HAVE_TERMIOS) */
704 /* Set the logical window size associated with descriptor FD
705 to HEIGHT and WIDTH. This is used mainly with ptys. */
707 int set_window_size(int fd, int height, int width)
713 size.ws_row = height;
716 if (ioctl(fd, TIOCSWINSZ, &size) == -1)
717 return 0; /* error */
721 #elif defined (TIOCSSIZE)
725 size.ts_lines = height;
726 size.ts_cols = width;
728 if (ioctl(fd, TIOCGSIZE, &size) == -1)
739 /* Set up the proper status flags for use of a pty. */
741 void setup_pty(int fd)
743 /* I'm told that TIOCREMOTE does not mean control chars
744 "can't be sent" but rather that they don't have
745 input-editing or signaling effects.
746 That should be good, because we have other ways
747 to do those things in Emacs.
748 However, telnet mode seems not to work on 4.2.
749 So TIOCREMOTE is turned off now. */
751 /* Under hp-ux, if TIOCREMOTE is turned on, some calls
752 will hang. In particular, the "timeout" feature (which
753 causes a read to return if there is no data available)
754 does this. Also it is known that telnet mode will hang
755 in such a way that Emacs must be stopped (perhaps this
756 is the same problem).
758 If TIOCREMOTE is turned off, then there is a bug in
759 hp-ux which sometimes loses data. Apparently the
760 code which blocks the master process when the internal
761 buffer fills up does not work. Other than this,
762 though, everything else seems to work fine.
764 Since the latter lossage is more benign, we may as well
765 lose that way. -- cph */
766 #if defined (FIONBIO) && defined (SYSV_PTYS)
769 ioctl(fd, FIONBIO, &on);
773 /* On AIX, the parent gets SIGHUP when a pty attached child dies. So, we */
774 /* ignore SIGHUP once we've started a child on a pty. Note that this may */
775 /* cause EMACS not to die when it should, i.e., when its own controlling */
776 /* tty goes away. I've complained to the AIX developers, and they may */
777 /* change this behavior, but I'm not going to hold my breath. */
778 signal(SIGHUP, SIG_IGN);
781 /* In some systems (Linux through 2.0.0, at least), packet mode doesn't
782 get cleared when a pty is closed, so we need to clear it here.
783 Linux pre2.0.13 contained an attempted fix for this (from Ted Ts'o,
784 tytso@mit.edu), but apparently it messed up rlogind and telnetd, so he
785 removed the fix in pre2.0.14. - dkindred@cs.cmu.edu
789 ioctl(fd, TIOCPKT, (char *)&off);
793 #endif /* HAVE_PTYS */
795 /************************************************************************/
797 /************************************************************************/
799 /* ------------------------------------------------------ */
801 /* ------------------------------------------------------ */
803 /* It really makes more sense for the baud-rate to be console-specific
804 and not device-specific, but it's (at least potentially) used for output
807 void init_baud_rate(struct device *d)
809 if (DEVICE_WIN_P(d) || DEVICE_STREAM_P(d)) {
810 DEVICE_BAUD_RATE(d) = 38400;
814 assert(DEVICE_TTY_P(d));
816 struct console *con = XCONSOLE(DEVICE_CONSOLE(d));
817 int input_fd = CONSOLE_TTY_DATA(con)->infd;
818 #if defined (HAVE_TERMIOS)
822 tcgetattr(input_fd, &sg);
823 DEVICE_TTY_DATA(d)->ospeed = cfgetospeed(&sg);
824 # if defined (USE_GETOBAUD) && defined (getobaud)
825 /* m88k-motorola-sysv3 needs this (ghazi@noc.rutgers.edu) 9/1/94. */
826 if (DEVICE_TTY_DATA(d)->ospeed == 0)
827 DEVICE_TTY_DATA(d)->ospeed = getobaud(sg.c_cflag);
829 #elif defined (HAVE_TERMIO)
834 tcgetattr(input_fd, &sg);
836 ioctl(input_fd, TCGETA, &sg);
838 DEVICE_TTY_DATA(d)->ospeed = sg.c_cflag & CBAUD;
839 #else /* neither TERMIOS nor TERMIO */
842 sg.sg_ospeed = B9600;
843 if (ioctl(input_fd, TIOCGETP, &sg) < 0)
845 DEVICE_TTY_DATA(d)->ospeed = sg.sg_ospeed;
849 DEVICE_BAUD_RATE(d) =
850 (DEVICE_TTY_DATA(d)->ospeed < countof(baud_convert)
851 ? baud_convert[DEVICE_TTY_DATA(d)->ospeed]
854 if (DEVICE_BAUD_RATE(d) == 0)
855 DEVICE_BAUD_RATE(d) = 1200;
856 #endif /* HAVE_TTY */
859 /* ------------------------------------------------------ */
861 /* ------------------------------------------------------ */
863 #if defined(SIGIO) && !defined(BROKEN_SIGIO)
865 static void init_sigio_on_device(struct device *d)
867 int filedesc = DEVICE_INFD(d);
869 #if defined (FIOSSAIOOWN)
871 int owner = getpid();
873 if (DEVICE_TTY_P(d)) {
874 #ifdef HAVE_UNIXOID_EVENT_LOOP
875 ioctl_status = ioctl(filedesc, FIOGSAIOOWN,
876 &DEVICE_OLD_FCNTL_OWNER(d));
878 ioctl_status = ioctl(filedesc, FIOSSAIOOWN, &owner);
880 #ifdef HAVE_WINDOW_SYSTEM
881 else if (!DEVICE_STREAM_P(d)) {
882 #ifdef HAVE_UNIXOID_EVENT_LOOP
883 ioctl_status = ioctl(filedesc, SIOCGPGRP,
884 &DEVICE_OLD_FCNTL_OWNER(d));
886 ioctl_status = ioctl(filedesc, SIOCSPGRP, &owner);
890 #elif defined (F_SETOWN) && !defined (F_SETOWN_BUG)
891 # ifdef HAVE_UNIXOID_EVENT_LOOP
892 DEVICE_OLD_FCNTL_OWNER(d) = fcntl(filedesc, F_GETOWN, 0);
894 # ifdef F_SETOWN_SOCK_NEG
895 /* stdin is a socket here */
896 fcntl(filedesc, F_SETOWN, -getpid());
898 fcntl(filedesc, F_SETOWN, getpid());
903 static void reset_sigio_on_device(struct device *d)
905 int filedesc = DEVICE_INFD(d);
907 #if defined (FIOSSAIOOWN)
910 if (DEVICE_TTY_P(d)) {
911 # ifdef HAVE_UNIXOID_EVENT_LOOP
912 ioctl_status = ioctl(filedesc, FIOSSAIOOWN,
913 &DEVICE_OLD_FCNTL_OWNER(d));
916 #ifdef HAVE_WINDOW_SYSTEM
917 else if (!DEVICE_STREAM_P(d)) {
918 # ifdef HAVE_UNIXOID_EVENT_LOOP
919 ioctl_status = ioctl(filedesc, SIOCSPGRP,
920 &DEVICE_OLD_FCNTL_OWNER(d));
925 #elif defined (F_SETOWN) && !defined (F_SETOWN_BUG)
926 # ifdef HAVE_UNIXOID_EVENT_LOOP
927 fcntl(filedesc, F_SETOWN, DEVICE_OLD_FCNTL_OWNER(d));
932 static void request_sigio_on_device(struct device *d)
934 int filedesc = DEVICE_INFD(d);
936 #if defined (I_SETSIG) && !defined(HPUX10) && !defined(LINUX)
939 ioctl(filedesc, I_GETSIG, &events);
940 ioctl(filedesc, I_SETSIG, events | S_INPUT);
942 #elif defined (FASYNC)
943 fcntl(filedesc, F_SETFL, fcntl(filedesc, F_GETFL, 0) | FASYNC);
944 #elif defined (FIOSSAIOSTAT)
946 /* DG: Changed for HP-UX. HP-UX uses different IOCTLs for
947 sockets and other devices for some bizarre reason. We guess
948 that an X device is a socket, and tty devices aren't. We then
949 use the following crud to do the appropriate thing. */
951 int ioctl_status; /* ####DG: check if IOCTL succeeds here. */
953 if (DEVICE_TTY_P(d)) {
954 ioctl_status = ioctl(filedesc, FIOSSAIOSTAT, &on);
956 #ifdef HAVE_WINDOW_SYSTEM
957 else if (!DEVICE_STREAM_P(d)) {
958 ioctl_status = ioctl(filedesc, FIOASYNC, &on);
962 #elif defined (FIOASYNC)
965 ioctl(filedesc, FIOASYNC, &on);
969 #if defined (_CX_UX) /* #### Is this crap necessary? */
970 EMACS_UNBLOCK_SIGNAL(SIGIO);
974 static void unrequest_sigio_on_device(struct device *d)
976 int filedesc = DEVICE_INFD(d);
978 #if defined (I_SETSIG) && !defined(HPUX10)
981 ioctl(filedesc, I_GETSIG, &events);
982 ioctl(filedesc, I_SETSIG, events & ~S_INPUT);
984 #elif defined (FASYNC)
985 fcntl(filedesc, F_SETFL, fcntl(filedesc, F_GETFL, 0) & ~FASYNC);
986 #elif defined (FIOSSAIOSTAT)
988 /* DG: Changed for HP-UX. HP-UX uses different IOCTLs for
989 sockets and other devices for some bizarre reason. We guess
990 that an X device is a socket, and tty devices aren't. We then
991 use the following crud to do the appropriate thing. */
996 /* See comment for request_sigio_on_device */
998 if (DEVICE_TTY_P(d)) {
999 ioctl_status = ioctl(filedesc, FIOSSAIOSTAT, &off);
1001 ioctl_status = ioctl(filedesc, FIOASYNC, &off);
1004 #elif defined (FIOASYNC)
1007 ioctl(filedesc, FIOASYNC, &off);
1012 void request_sigio(void)
1014 Lisp_Object devcons, concons;
1016 DEVICE_LOOP_NO_BREAK(devcons, concons) {
1019 d = XDEVICE(XCAR(devcons));
1021 if (!DEVICE_STREAM_P(d))
1022 request_sigio_on_device(d);
1026 void unrequest_sigio(void)
1028 Lisp_Object devcons, concons;
1030 DEVICE_LOOP_NO_BREAK(devcons, concons) {
1033 d = XDEVICE(XCAR(devcons));
1035 if (!DEVICE_STREAM_P(d))
1036 unrequest_sigio_on_device(d);
1042 /* ------------------------------------------------------ */
1043 /* Changing Emacs's process group */
1044 /* ------------------------------------------------------ */
1046 /* Saving and restoring the process group of Emacs's terminal. */
1048 /* On some systems, apparently (?!) Emacs must be in its own process
1049 group in order to receive SIGIO correctly. On other systems
1050 (e.g. Solaris), it's not required and doing it makes things
1051 get fucked up. So, we only do it when
1052 SIGIO_REQUIRES_SEPARATE_PROCESS_GROUP is defined. Basically,
1053 this is only required for BSD 4.2 systems. (Actually, I bet
1054 we don't have to do this at all -- those systems also
1055 required interrupt input, which we don't support.)
1057 If Emacs was in its own process group (i.e. inherited_pgroup ==
1058 getpid ()), then we know we're running under a shell with job
1059 control (Emacs would never be run as part of a pipeline).
1062 If Emacs was not in its own process group, then we know we're
1063 running under a shell (or a caller) that doesn't know how to
1064 separate itself from Emacs (like sh). Emacs must be in its own
1065 process group in order to receive SIGIO correctly. In this
1066 situation, we put ourselves in our own pgroup, forcibly set the
1067 tty's pgroup to our pgroup, and make sure to restore and reinstate
1068 the tty's pgroup just like any other terminal setting. If
1069 inherited_group was not the tty's pgroup, then we'll get a
1070 SIGTTmumble when we try to change the tty's pgroup, and a CONT if
1071 it goes foreground in the future, which is what should happen. */
1073 #ifdef SIGIO_REQUIRES_SEPARATE_PROCESS_GROUP
1075 static pid_t inherited_pgroup;
1076 static pid_t inherited_tty_pgroup;
1080 void munge_tty_process_group(void)
1082 #ifdef SIGIO_REQUIRES_SEPARATE_PROCESS_GROUP
1086 /* Only do this munging if we have a device on the controlling
1087 terminal. See the large comment below. */
1089 if (CONSOLEP(Vcontrolling_terminal) &&
1090 CONSOLE_LIVE_P(XCONSOLE(Vcontrolling_terminal))) {
1091 int fd = open("/dev/tty", O_RDWR, 0);
1092 pid_t me = getpid();
1093 EMACS_BLOCK_SIGNAL(SIGTTOU);
1094 EMACS_SET_TTY_PROCESS_GROUP(fd, &me);
1095 EMACS_UNBLOCK_SIGNAL(SIGTTOU);
1101 /* Split off the foreground process group to Emacs alone.
1102 When we are in the foreground, but not started in our own process
1103 group, redirect the TTY to point to our own process group. We need
1104 to be in our own process group to receive SIGIO properly. */
1105 static void munge_process_groups(void)
1107 #ifdef SIGIO_REQUIRES_SEPARATE_PROCESS_GROUP
1111 EMACS_SEPARATE_PROCESS_GROUP();
1113 munge_tty_process_group();
1117 void unmunge_tty_process_group(void)
1119 #ifdef SIGIO_REQUIRES_SEPARATE_PROCESS_GROUP
1121 int fd = open("/dev/tty", O_RDWR, 0);
1122 EMACS_BLOCK_SIGNAL(SIGTTOU);
1123 EMACS_SET_TTY_PROCESS_GROUP(fd, &inherited_tty_pgroup);
1124 EMACS_UNBLOCK_SIGNAL(SIGTTOU);
1130 /* Set the tty to our original foreground group.
1131 Also restore the original process group (put us back into sh's
1132 process group), so that ^Z will suspend both us and sh. */
1133 static void unmunge_process_groups(void)
1135 #ifdef SIGIO_REQUIRES_SEPARATE_PROCESS_GROUP
1139 unmunge_tty_process_group();
1141 EMACS_SET_PROCESS_GROUP(inherited_pgroup);
1145 /* According to some old wisdom, we need to be in a separate process
1146 group for SIGIO to work correctly (at least on some systems ...).
1147 So go ahead and put ourselves into our own process group. This
1148 will fail if we're already in our own process group, but who cares.
1149 Also record whether we were in our own process group. (In general,
1150 we will already be in our own process group if we were started from
1151 a job-control shell like csh, but not if we were started from sh).
1153 If we succeeded in changing our process group, then we will no
1154 longer be in the foreground process group of our controlling
1155 terminal. Therefore, if we have a console open onto this terminal,
1156 we have to change the controlling terminal's foreground process
1157 group (otherwise we will get stopped with a SIGTTIN signal when
1158 attempting to read from the terminal). It's important,
1159 however, that we do this *only* when we have a console open onto
1160 the terminal. It's a decidedly bad idea to do so otherwise,
1161 especially if XEmacs was started from the background. */
1163 void init_process_group(void)
1165 #ifdef SIGIO_REQUIRES_SEPARATE_PROCESS_GROUP
1166 if (!noninteractive) {
1167 int fd = open("/dev/tty", O_RDWR, 0);
1168 inherited_pgroup = EMACS_GET_PROCESS_GROUP();
1169 EMACS_GET_TTY_PROCESS_GROUP(fd, &inherited_tty_pgroup);
1171 EMACS_SEPARATE_PROCESS_GROUP();
1176 void disconnect_controlling_terminal(void)
1179 /* Controlling terminals are attached to a session.
1180 Create a new session for us; it will have no controlling
1181 terminal. This also, of course, puts us in our own
1185 /* Put us in our own process group. */
1186 EMACS_SEPARATE_PROCESS_GROUP();
1187 # if defined (TIOCNOTTY)
1188 /* This is the older way of disconnecting the controlling
1189 terminal, on 4.3 BSD. We must open /dev/tty; using
1190 filedesc 0 is not sufficient because it could be
1191 something else (e.g. our stdin was redirected to
1195 int j = open("/dev/tty", O_RDWR, 0);
1196 ioctl(j, TIOCNOTTY, 0);
1199 # endif /* TIOCNOTTY */
1201 On systems without TIOCNOTTY and without
1202 setsid(), we don't need to do anything more to
1203 disconnect our controlling terminal. Here is
1204 what the man page for termio(7) from a SYSV 3.2
1207 "The first terminal file opened by the process group leader
1208 of a terminal file not already associated with a process
1209 group becomes the control terminal for that process group.
1210 The control terminal plays a special role in handling quit
1211 and interrupt signals, as discussed below. The control
1212 terminal is inherited by a child process during a fork(2).
1213 A process can break this association by changing its process
1214 group using setpgrp(2)."
1217 # endif /* not HAVE_SETSID */
1220 /* ------------------------------------------------------ */
1221 /* Getting and setting emacs_tty structures */
1222 /* ------------------------------------------------------ */
1224 /* It's wrong to encase these into #ifdef HAVE_TTY because we need
1225 them for child TTY processes. */
1226 /* However, this does break NT support while we don't do child TTY processes */
1228 /* Set *TC to the parameters associated with the terminal FD.
1229 Return zero if all's well, or -1 if we ran into an error we
1230 couldn't deal with. */
1231 int emacs_get_tty(int fd, struct emacs_tty *settings)
1233 /* Retrieve the primary parameters - baud rate, character size, etcetera. */
1235 /* We have those nifty POSIX tcmumbleattr functions. */
1236 if (tcgetattr(fd, &settings->main) < 0)
1239 #elif defined HAVE_TERMIO
1240 /* The SYSV-style interface? */
1241 if (ioctl(fd, TCGETA, &settings->main) < 0)
1245 /* I give up - I hope you have the BSD ioctls. */
1246 if (ioctl(fd, TIOCGETP, &settings->main) < 0)
1248 #endif /* HAVE_TCATTR */
1250 /* Suivant - Do we have to get struct ltchars data? */
1252 if (ioctl(fd, TIOCGLTC, &settings->ltchars) < 0)
1256 /* How about a struct tchars and a wordful of lmode bits? */
1258 if (ioctl(fd, TIOCGETC, &settings->tchars) < 0
1259 || ioctl(fd, TIOCLGET, &settings->lmode) < 0)
1263 /* We have survived the tempest. */
1267 /* Set the parameters of the tty on FD according to the contents of
1268 *SETTINGS. If FLUSHP is non-zero, we discard input.
1269 Return 0 if all went well, and -1 if anything failed.
1270 #### All current callers use FLUSHP == 0. */
1272 int emacs_set_tty(int fd, struct emacs_tty *settings, int flushp)
1274 /* Set the primary parameters - baud rate, character size, etcetera. */
1277 /* We have those nifty POSIX tcmumbleattr functions.
1278 William J. Smith <wjs@wiis.wang.com> writes:
1279 "POSIX 1003.1 defines tcsetattr() to return success if it was
1280 able to perform any of the requested actions, even if some
1281 of the requested actions could not be performed.
1282 We must read settings back to ensure tty setup properly.
1283 AIX requires this to keep tty from hanging occasionally." */
1284 /* This makes sure that we don't loop indefinitely in here. */
1285 for (i = 0; i < 10; i++)
1287 (fd, flushp ? TCSAFLUSH : TCSADRAIN, &settings->main) < 0) {
1295 /* Get the current settings, and see if they're what we asked for. */
1296 tcgetattr(fd, &new);
1297 /* We cannot use memcmp on the whole structure here because under
1298 * aix386 the termios structure has some reserved field that may
1301 if (new.c_iflag == settings->main.c_iflag
1302 && new.c_oflag == settings->main.c_oflag
1303 && new.c_cflag == settings->main.c_cflag
1304 && new.c_lflag == settings->main.c_lflag
1305 && memcmp(new.c_cc, settings->main.c_cc, NCCS) == 0)
1310 #elif defined HAVE_TERMIO
1311 /* The SYSV-style interface? */
1312 if (ioctl(fd, flushp ? TCSETAF : TCSETAW, &settings->main) < 0)
1316 /* I give up - I hope you have the BSD ioctls. */
1317 if (ioctl(fd, (flushp) ? TIOCSETP : TIOCSETN, &settings->main) < 0)
1319 #endif /* HAVE_TCATTR */
1321 /* Suivant - Do we have to get struct ltchars data? */
1323 if (ioctl(fd, TIOCSLTC, &settings->ltchars) < 0)
1327 /* How about a struct tchars and a wordful of lmode bits? */
1329 if (ioctl(fd, TIOCSETC, &settings->tchars) < 0
1330 || ioctl(fd, TIOCLSET, &settings->lmode) < 0)
1334 /* We have survived the tempest. */
1339 /* ------------------------------------------------------ */
1340 /* Initializing a device */
1341 /* ------------------------------------------------------ */
1345 /* This may also be defined in stdio,
1346 but if so, this does no harm,
1347 and using the same name avoids wasting the other one's space. */
1349 #if ((defined(USG) || defined(DGUX)) && !defined(__STDC__))
1350 char _sobuf[BUFSIZ + 8];
1351 #elif (defined(USG) && !defined(LINUX) && !defined(_SCO_DS)) || defined(IRIX5)
1352 extern unsigned char _sobuf[BUFSIZ + 8];
1354 char _sobuf[BUFSIZ];
1357 #if defined (TIOCGLTC) && defined (HAVE_LTCHARS) /* HAVE_LTCHARS */
1358 static struct ltchars new_ltchars = { -1, -1, -1, -1, -1, -1 };
1360 #ifdef TIOCGETC /* HAVE_TCHARS */
1362 static struct tchars new_tchars = { -1, -1, -1, -1, -1, -1 };
1366 static void tty_init_sys_modes_on_device(struct device *d)
1368 struct emacs_tty tty;
1369 int input_fd, output_fd;
1370 struct console *con = XCONSOLE(DEVICE_CONSOLE(d));
1372 input_fd = CONSOLE_TTY_DATA(con)->infd;
1373 output_fd = CONSOLE_TTY_DATA(con)->outfd;
1375 emacs_get_tty(input_fd, &CONSOLE_TTY_DATA(con)->old_tty);
1376 tty = CONSOLE_TTY_DATA(con)->old_tty;
1378 con->tty_erase_char = Qnil;
1380 #if defined (HAVE_TERMIO) || defined (HAVE_TERMIOS)
1381 /* after all those years... */
1382 con->tty_erase_char = make_char(tty.main.c_cc[VERASE]);
1384 /* This allows meta to be sent on 8th bit. */
1385 tty.main.c_iflag &= ~INPCK; /* don't check input for parity */
1387 tty.main.c_iflag |= (IGNBRK); /* Ignore break condition */
1388 tty.main.c_iflag &= ~ICRNL; /* Disable map of CR to NL on input */
1390 tty.main.c_iflag &= ~ISTRIP; /* don't strip 8th bit on input */
1392 tty.main.c_lflag &= ~ECHO; /* Disable echo */
1393 tty.main.c_lflag &= ~ICANON; /* Disable erase/kill processing */
1395 tty.main.c_lflag &= ~IEXTEN; /* Disable other editing characters. */
1397 tty.main.c_lflag |= ISIG; /* Enable signals */
1398 if (TTY_FLAGS(con).flow_control) {
1399 tty.main.c_iflag |= IXON; /* Enable start/stop output control */
1401 tty.main.c_iflag &= ~IXANY;
1404 tty.main.c_iflag &= ~IXON; /* Disable start/stop output control */
1405 tty.main.c_oflag &= ~ONLCR; /* Disable map of NL to CR-NL
1407 tty.main.c_oflag &= ~TAB3; /* Disable tab expansion */
1409 if (TTY_FLAGS(con).meta_key) {
1410 tty.main.c_cflag |= CS8; /* allow 8th bit on input */
1411 tty.main.c_cflag &= ~PARENB; /* Don't check parity */
1414 if (CONSOLE_TTY_DATA(con)->controlling_terminal) {
1415 tty.main.c_cc[VINTR] = CONSOLE_QUIT_CHAR(con); /* C-g (usually) gives SIGINT */
1416 /* Set up C-g for both SIGQUIT and SIGINT.
1417 We don't know which we will get, but we handle both alike
1418 so which one it really gives us does not matter. */
1419 tty.main.c_cc[VQUIT] = CONSOLE_QUIT_CHAR(con);
1421 tty.main.c_cc[VINTR] = _POSIX_VDISABLE;
1422 tty.main.c_cc[VQUIT] = _POSIX_VDISABLE;
1424 tty.main.c_cc[VMIN] = 1; /* Input should wait for at
1426 tty.main.c_cc[VTIME] = 0; /* no matter how long that takes. */
1428 tty.main.c_cc[VSWTCH] = _POSIX_VDISABLE; /* Turn off shell layering use
1431 /* There was some conditionalizing here on (mips or TCATTR), but
1432 I think that's wrong. There was one report of C-y (DSUSP) not being
1433 disabled on HP9000s700 systems, and this might fix it. */
1435 tty.main.c_cc[VSUSP] = _POSIX_VDISABLE; /* Turn off mips handling of C-z. */
1438 tty.main.c_cc[V_DSUSP] = _POSIX_VDISABLE; /* Turn off mips handling of C-y. */
1439 #endif /* V_DSUSP */
1440 #ifdef VDSUSP /* Some systems have VDSUSP, some have V_DSUSP. */
1441 tty.main.c_cc[VDSUSP] = _POSIX_VDISABLE;
1444 tty.main.c_cc[VLNEXT] = _POSIX_VDISABLE;
1447 tty.main.c_cc[VREPRINT] = _POSIX_VDISABLE;
1448 #endif /* VREPRINT */
1450 tty.main.c_cc[VWERASE] = _POSIX_VDISABLE;
1451 #endif /* VWERASE */
1453 tty.main.c_cc[VDISCARD] = _POSIX_VDISABLE;
1454 #endif /* VDISCARD */
1456 tty.main.c_cc[VSTART] = _POSIX_VDISABLE;
1459 tty.main.c_cc[VSTRT] = _POSIX_VDISABLE; /* called VSTRT on some systems */
1462 tty.main.c_cc[VSTOP] = _POSIX_VDISABLE;
1464 #ifdef SET_LINE_DISCIPLINE
1465 /* Need to explicitly request TERMIODISC line discipline or
1466 Ultrix's termios does not work correctly. */
1467 tty.main.c_line = SET_LINE_DISCIPLINE;
1472 /* AIX enhanced edit loses NULs, so disable it. */
1473 tty.main.c_line = 0;
1474 tty.main.c_iflag &= ~ASCEDIT;
1476 tty.main.c_cc[VSTRT] = 255;
1477 tty.main.c_cc[VSTOP] = 255;
1478 tty.main.c_cc[VSUSP] = 255;
1479 tty.main.c_cc[VDSUSP] = 255;
1480 #endif /* IBMR2AIX */
1481 /* Also, PTY overloads NUL and BREAK.
1482 don't ignore break, but don't signal either, so it looks like NUL.
1483 This really serves a purpose only if running in an XTERM window
1484 or via TELNET or the like, but does no harm elsewhere. */
1485 tty.main.c_iflag &= ~IGNBRK;
1486 tty.main.c_iflag &= ~BRKINT;
1488 #else /* if not HAVE_TERMIO */
1489 con->tty_erase_char = make_char(tty.main.sg_erase);
1490 tty.main.sg_flags &= ~(ECHO | CRMOD | XTABS);
1491 if (TTY_FLAGS(con).meta_key)
1492 tty.main.sg_flags |= ANYP;
1493 /* #### should we be using RAW mode here? */
1494 tty.main.sg_flags |= /* interrupt_input ? RAW : */ CBREAK;
1495 #endif /* not HAVE_TERMIO */
1497 /* If going to use CBREAK mode, we must request C-g to interrupt
1498 and turn off start and stop chars, etc. If not going to use
1499 CBREAK mode, do this anyway so as to turn off local flow
1500 control for user coming over network on 4.2; in this case,
1501 only t_stopc and t_startc really matter. */
1504 /* Note: if not using CBREAK mode, it makes no difference how we
1506 tty.tchars = new_tchars;
1507 tty.tchars.t_intrc = CONSOLE_QUIT_CHAR(con);
1508 if (TTY_FLAGS(con).flow_control) {
1509 tty.tchars.t_startc = '\021';
1510 tty.tchars.t_stopc = '\023';
1513 tty.lmode = LDECCTQ | LLITOUT | LPASS8 | LNOFLSH |
1514 CONSOLE_TTY_DATA(con)->old_tty.lmode;
1516 #if defined (ultrix) || defined (__bsdi__)
1517 /* Under Ultrix 4.2a, leaving this out doesn't seem to hurt
1518 anything, and leaving it in breaks the meta key. Go figure. */
1519 /* Turning off ONLCR is enough under BSD/386. Leave the general
1520 output post-processing flag alone since for some reason it
1521 doesn't get reset after XEmacs goes away. */
1522 tty.lmode &= ~LLITOUT;
1525 #endif /* HAVE_TCHARS */
1526 #endif /* not HAVE_TERMIO */
1529 tty.ltchars = new_ltchars;
1530 #endif /* HAVE_LTCHARS */
1532 emacs_set_tty(input_fd, &tty, 0);
1534 /* This code added to insure that, if flow-control is not to be used,
1535 we have an unlocked terminal at the start. */
1538 if (!TTY_FLAGS(con).flow_control)
1539 ioctl(input_fd, TCXONC, 1);
1542 if (!TTY_FLAGS(con).flow_control)
1543 ioctl(input_fd, TIOCSTART, 0);
1546 #if defined (HAVE_TERMIOS) || defined (HPUX9)
1548 if (!TTY_FLAGS(con).flow_control)
1549 tcflow(input_fd, TCOON);
1556 /* IBM's HFT device usually thinks a ^J should be LF/CR.
1557 We need it to be only LF. This is the way that is
1561 if (ioctl(output_fd, HFTGETID, &tty) != -1)
1562 write(output_fd, "\033[20l", 5);
1567 #if 0 /* We do our own buffering with lstreams. */
1569 /* This symbol is defined on recent USG systems.
1570 Someone says without this call USG won't really buffer the file
1571 even with a call to setbuf. */
1572 setvbuf(CONSOLE_TTY_DATA(con)->outfd, (char *)_sobuf, _IOFBF,
1575 setbuf(CONSOLE_TTY_DATA(con)->outfd, (char *)_sobuf);
1581 #endif /* HAVE_TTY */
1583 void init_one_device(struct device *d)
1586 if (DEVICE_TTY_P(d))
1587 tty_init_sys_modes_on_device(d);
1589 #if defined(SIGIO) && !defined(BROKEN_SIGIO)
1590 if (!DEVICE_STREAM_P(d)) {
1591 init_sigio_on_device(d);
1592 request_sigio_on_device(d);
1597 void init_one_console(struct console *con)
1599 Lisp_Object devcons;
1601 CONSOLE_DEVICE_LOOP(devcons, con) {
1602 struct device *d = XDEVICE(XCAR(devcons));
1608 void reinit_initial_console(void)
1610 munge_process_groups();
1611 if (CONSOLEP(Vcontrolling_terminal) &&
1612 CONSOLE_LIVE_P(XCONSOLE(Vcontrolling_terminal)))
1613 init_one_console(XCONSOLE(Vcontrolling_terminal));
1616 /* ------------------------------------------------------ */
1617 /* Other TTY functions */
1618 /* ------------------------------------------------------ */
1622 #if 0 /* not currently used */
1624 /* Return nonzero if safe to use tabs in output.
1625 At the time this is called, init_sys_modes has not been done yet. */
1627 int tabs_safe_p(struct device *d)
1630 if (DEVICE_TTY_P(d)) {
1631 struct emacs_tty tty;
1633 emacs_get_tty(DEVICE_INFD(d), &tty);
1634 return EMACS_TTY_TABS_OK(&tty);
1642 /* Get terminal size from system.
1643 Store number of lines into *heightp and width into *widthp.
1644 If zero or a negative number is stored, the value is not valid. */
1646 void get_tty_device_size(struct device *d, int *widthp, int *heightp)
1648 int input_fd = DEVICE_INFD(d);
1650 assert(DEVICE_TTY_P(d));
1655 struct winsize size;
1657 if (ioctl(input_fd, TIOCGWINSZ, &size) == -1)
1658 *widthp = *heightp = 0;
1660 *widthp = size.ws_col;
1661 *heightp = size.ws_row;
1664 #elif defined TIOCGSIZE
1666 /* SunOS - style. */
1667 struct ttysize size;
1669 if (ioctl(input_fd, TIOCGSIZE, &size) == -1)
1670 *widthp = *heightp = 0;
1672 *widthp = size.ts_cols;
1673 *heightp = size.ts_lines;
1676 #else /* system doesn't know size */
1681 #endif /* not !TIOCGWINSZ */
1684 #endif /* HAVE_TTY */
1686 /* ------------------------------------------------------ */
1687 /* Is device 8 bit ? */
1688 /* ------------------------------------------------------ */
1692 int eight_bit_tty(struct device *d)
1698 assert(DEVICE_TTY_P(d));
1699 input_fd = DEVICE_INFD(d);
1701 emacs_get_tty(input_fd, &s);
1703 #if defined (HAVE_TERMIO) || defined (HAVE_TERMIOS)
1704 eight_bit = (s.main.c_cflag & CSIZE) == CS8;
1706 eight_bit = 0; /* I don't know how to do it */
1711 #endif /* HAVE_TTY */
1713 /* ------------------------------------------------------ */
1714 /* Resetting a device */
1715 /* ------------------------------------------------------ */
1719 /* Prepare the terminal for exiting Emacs; move the cursor to the
1720 bottom of the frame, turn off interrupt-driven I/O, etc. */
1721 static void tty_reset_sys_modes_on_device(struct device *d)
1723 int input_fd, output_fd;
1724 struct console *con = XCONSOLE(DEVICE_CONSOLE(d));
1726 input_fd = CONSOLE_TTY_DATA(con)->infd;
1727 output_fd = CONSOLE_TTY_DATA(con)->outfd;
1729 #if defined (IBMR2AIX) && defined (AIXHFT)
1731 /* HFT consoles normally use ^J as a LF/CR. We forced it to
1732 do the LF only. Now, we need to reset it. */
1735 if (ioctl(output_fd, HFTGETID, &tty) != -1)
1736 write(output_fd, "\033[20h", 5);
1740 tty_redisplay_shutdown(con);
1741 /* reset_tty_modes() flushes the connection at its end. */
1742 reset_tty_modes(con);
1745 /* Avoid possible loss of output when changing terminal modes. */
1749 while (emacs_set_tty(input_fd, &CONSOLE_TTY_DATA(con)->old_tty, 0)
1750 < 0 && errno == EINTR) ;
1752 #ifdef SET_LINE_DISCIPLINE
1753 /* Ultrix's termios *ignores* any line discipline except TERMIODISC.
1754 A different old line discipline is therefore not restored, yet.
1755 Restore the old line discipline by hand. */
1756 ioctl(input_fd, TIOCSETD, &old_tty.main.c_line);
1765 #endif /* HAVE_TTY */
1767 void reset_one_device(struct device *d)
1770 if (DEVICE_TTY_P(d))
1771 tty_reset_sys_modes_on_device(d);
1774 if (DEVICE_STREAM_P(d))
1775 fflush(CONSOLE_STREAM_DATA(XCONSOLE(DEVICE_CONSOLE(d)))->out);
1776 #if defined(SIGIO) && !defined(BROKEN_SIGIO)
1777 if (!DEVICE_STREAM_P(d)) {
1778 unrequest_sigio_on_device(d);
1779 reset_sigio_on_device(d);
1784 void reset_one_console(struct console *con)
1786 /* Note: this can be called during GC. */
1787 Lisp_Object devcons;
1789 CONSOLE_DEVICE_LOOP(devcons, con) {
1790 struct device *d = XDEVICE(XCAR(devcons));
1792 reset_one_device(d);
1796 void reset_all_consoles(void)
1798 /* Note: this can be called during GC. */
1799 Lisp_Object concons;
1801 CONSOLE_LOOP(concons) {
1802 struct console *con = XCONSOLE(XCAR(concons));
1804 reset_one_console(con);
1807 unmunge_process_groups();
1810 void reset_initial_console(void)
1812 if (CONSOLEP(Vcontrolling_terminal) &&
1813 CONSOLE_LIVE_P(XCONSOLE(Vcontrolling_terminal)))
1814 reset_one_console(XCONSOLE(Vcontrolling_terminal));
1815 unmunge_process_groups();
1818 /* ------------------------------------------------------ */
1819 /* extra TTY stuff under AIX */
1820 /* ------------------------------------------------------ */
1824 /* Called from init_sys_modes. */
1825 static void hft_init(struct console *con)
1830 assert(CONSOLE_TTY_P(con));
1831 input_fd = CONSOLE_TTY_DATA(con)->infd;
1833 /* If we're not on an HFT we shouldn't do any of this. We determine
1834 if we are on an HFT by trying to get an HFT error code. If this
1835 call fails, we're not on an HFT. */
1837 if (ioctl(input_fd, HFQERROR, &junk) < 0)
1839 #else /* not IBMR2AIX */
1840 if (ioctl(input_fd, HFQEIO, 0) < 0)
1842 #endif /* not IBMR2AIX */
1844 /* On AIX the default hft keyboard mapping uses backspace rather than delete
1845 as the rubout key's ASCII code. Here this is changed. The bug is that
1846 there's no way to determine the old mapping, so in reset_one_console
1847 we need to assume that the normal map had been present. Of course, this
1848 code also doesn't help if on a terminal emulator which doesn't understand
1852 struct hfkeymap keymap;
1854 buf.hf_bufp = (char *)&keymap;
1855 buf.hf_buflen = sizeof(keymap);
1856 keymap.hf_nkeys = 2;
1857 keymap.hfkey[0].hf_kpos = 15;
1858 keymap.hfkey[0].hf_kstate = HFMAPCHAR | HFSHFNONE;
1860 keymap.hfkey[0].hf_keyidh = '<';
1861 #else /* not IBMR2AIX */
1862 keymap.hfkey[0].hf_page = '<';
1863 #endif /* not IBMR2AIX */
1864 keymap.hfkey[0].hf_char = 127;
1865 keymap.hfkey[1].hf_kpos = 15;
1866 keymap.hfkey[1].hf_kstate = HFMAPCHAR | HFSHFSHFT;
1868 keymap.hfkey[1].hf_keyidh = '<';
1869 #else /* not IBMR2AIX */
1870 keymap.hfkey[1].hf_page = '<';
1871 #endif /* not IBMR2AIX */
1872 keymap.hfkey[1].hf_char = 127;
1873 hftctl(input_fd, HFSKBD, &buf);
1875 /* #### Should probably set a console TTY flag here. */
1877 /* The HFT system on AIX doesn't optimize for scrolling, so it's really ugly
1879 line_ins_del_ok = char_ins_del_ok = 0;
1883 /* Reset the rubout key to backspace. */
1885 static void hft_reset(struct console *con)
1888 struct hfkeymap keymap;
1892 assert(CONSOLE_TTY_P(con));
1893 input_fd = CONSOLE_TTY_DATA(con)->infd;
1896 if (ioctl(input_fd, HFQERROR, &junk) < 0)
1898 #else /* not IBMR2AIX */
1899 if (ioctl(input_fd, HFQEIO, 0) < 0)
1901 #endif /* not IBMR2AIX */
1903 buf.hf_bufp = (char *)&keymap;
1904 buf.hf_buflen = sizeof(keymap);
1905 keymap.hf_nkeys = 2;
1906 keymap.hfkey[0].hf_kpos = 15;
1907 keymap.hfkey[0].hf_kstate = HFMAPCHAR | HFSHFNONE;
1909 keymap.hfkey[0].hf_keyidh = '<';
1910 #else /* not IBMR2AIX */
1911 keymap.hfkey[0].hf_page = '<';
1912 #endif /* not IBMR2AIX */
1913 keymap.hfkey[0].hf_char = 8;
1914 keymap.hfkey[1].hf_kpos = 15;
1915 keymap.hfkey[1].hf_kstate = HFMAPCHAR | HFSHFSHFT;
1917 keymap.hfkey[1].hf_keyidh = '<';
1918 #else /* not IBMR2AIX */
1919 keymap.hfkey[1].hf_page = '<';
1920 #endif /* not IBMR2AIX */
1921 keymap.hfkey[1].hf_char = 8;
1922 hftctl(input_fd, HFSKBD, &buf);
1927 /************************************************************************/
1928 /* limits of text/data segments */
1929 /************************************************************************/
1931 #if !defined(CANNOT_DUMP) && !defined(PDUMP)
1935 #ifndef SYSTEM_MALLOC
1942 /* Some systems that cannot dump also cannot implement these. */
1945 * Return the address of the start of the text segment prior to
1946 * doing an unexec. After unexec the return value is undefined.
1947 * See crt0.c for further explanation and _start.
1951 #if !defined(HAVE_TEXT_START) && !defined(PDUMP)
1953 EXTERN_C int _start(void);
1955 char *start_of_text(void)
1958 return (char *)TEXT_START;
1960 return (char *)_start;
1961 #endif /* TEXT_START */
1963 #endif /* !defined(HAVE_TEXT_START) && !defined(PDUMP) */
1966 * Return the address of the start of the data segment prior to
1967 * doing an unexec. After unexec the return value is undefined.
1968 * See ecrt0.c for further information and definition of data_start.
1970 * Apparently, on BSD systems this is etext at startup. On
1971 * USG systems (swapping) this is highly mmu dependent and
1972 * is also dependent on whether or not the program is running
1973 * with shared text. Generally there is a (possibly large)
1974 * gap between end of text and start of data with shared text.
1976 * On Uniplus+ systems with shared text, data starts at a
1977 * fixed address. Each port (from a given oem) is generally
1978 * different, and the specific value of the start of data can
1979 * be obtained via the UniPlus+ specific "uvar" system call,
1980 * however the method outlined in crt0.c seems to be more portable.
1982 * Probably what will have to happen when a USG unexec is available,
1983 * at least on UniPlus, is temacs will have to be made unshared so
1984 * that text and data are contiguous. Then once loadup is complete,
1985 * unexec will produce a shared executable where the data can be
1986 * at the normal shared text boundary and the startofdata variable
1987 * will be patched by unexec to the correct value.
1991 #if defined(ORDINARY_LINK)
1992 extern char **environ;
1995 void *start_of_data(void)
1998 return ((char *)DATA_START);
2000 #if defined (ORDINARY_LINK) || defined(PDUMP)
2002 * This is a hack. Since we're not linking crt0.c or pre_crt0.c,
2003 * data_start isn't defined. We take the address of environ, which
2004 * is known to live at or near the start of the system crt0.c, and
2005 * we don't sweat the handful of bytes that might lose.
2007 #if defined (HEAP_IN_DATA) && !defined(PDUMP)
2008 extern char *static_heap_base;
2010 return static_heap_base;
2012 return ((char *)&environ);
2014 extern int data_start;
2015 return ((char *)&data_start);
2016 #endif /* ORDINARY_LINK */
2017 #endif /* DATA_START */
2019 #endif /* NEED_STARTS (not CANNOT_DUMP or not SYSTEM_MALLOC) */
2021 #if !defined(CANNOT_DUMP) && !defined(PDUMP)
2022 /* Some systems that cannot dump also cannot implement these. */
2025 * Return the address of the end of the text segment prior to
2026 * doing an unexec. After unexec the return value is undefined.
2029 char *end_of_text(void)
2032 return ((char *)TEXT_END);
2035 return ((char *)&etext);
2040 * Return the address of the end of the data segment prior to
2041 * doing an unexec. After unexec the return value is undefined.
2044 char *end_of_data(void)
2047 return ((char *)DATA_END);
2050 return ((char *)&edata);
2054 #endif /* !defined(CANNOT_DUMP) && !defined(PDUMP) */
2056 /************************************************************************/
2057 /* get the system name */
2058 /************************************************************************/
2060 /* init_system_name sets up the string for the Lisp function
2061 system-name to return. */
2063 extern Lisp_Object Vsystem_name;
2065 void init_system_name(void)
2067 #if !defined (HAVE_GETHOSTNAME)
2070 Vsystem_name = build_string(uts.nodename);
2071 #else /* HAVE_GETHOSTNAME */
2072 unsigned int hostname_size = 256;
2073 char *hostname = (char *)alloca(hostname_size);
2075 /* Try to get the host name; if the buffer is too short, try
2076 again. Apparently, the only indication gethostname gives of
2077 whether the buffer was large enough is the presence or absence
2078 of a '\0' in the string. Eech. */
2080 gethostname(hostname, hostname_size - 1);
2081 hostname[hostname_size - 1] = '\0';
2083 /* Was the buffer large enough for the '\0'? */
2084 if (strlen(hostname) < (size_t) (hostname_size - 1))
2087 hostname_size <<= 1;
2088 hostname = (char *)alloca(hostname_size);
2090 # if defined( HAVE_SOCKETS)
2091 /* Turn the hostname into the official, fully-qualified hostname.
2092 Don't do this if we're going to dump; this can confuse system
2093 libraries on some machines and make the dumped emacs core dump. */
2094 # ifndef CANNOT_DUMP
2096 # endif /* not CANNOT_DUMP */
2097 if (!strchr(hostname, '.')) {
2098 # if !(defined(HAVE_GETADDRINFO) && defined(HAVE_GETNAMEINFO))
2099 struct hostent *hp = NULL;
2102 for (count = 0; count < 10; count++) {
2105 /* Some systems can't handle SIGALARM/SIGIO in gethostbyname(). */
2107 hp = gethostbyname(hostname);
2110 if (!(hp == 0 && h_errno == TRY_AGAIN))
2112 Fsleep_for(make_int(1));
2116 const char *fqdn = (const char *)hp->h_name;
2119 if (!strchr(fqdn, '.')) {
2120 /* We still don't have a fully qualified domain name.
2121 Try to find one in the list of alternate names */
2122 char **alias = hp->h_aliases;
2123 while (*alias && !strchr(*alias, '.'))
2128 len = strlen(fqdn) + 1;
2129 hostname = (char *)alloca(len);
2130 xstrncpy(hostname, fqdn,len);
2132 # else /* !(HAVE_GETADDRINFO && HAVE_GETNAMEINFO) */
2133 struct addrinfo hints, *res;
2136 hints.ai_flags = AI_CANONNAME;
2137 #ifdef IPV6_CANONICALIZE
2138 hints.ai_family = AF_UNSPEC;
2140 hints.ai_family = PF_INET;
2142 hints.ai_socktype = SOCK_STREAM;
2143 hints.ai_protocol = 0;
2144 if (!getaddrinfo(hostname, NULL, &hints, &res)) {
2145 ssize_t canon_len=strlen(res->ai_canonname)+1;
2147 hostname = (char *)alloca(canon_len);
2148 xstrncpy(hostname, res->ai_canonname, canon_len);
2151 # endif /* !(HAVE_GETADDRINFO && HAVE_GETNAMEINFO) */
2153 # endif /* HAVE_SOCKETS */
2154 Vsystem_name = build_string(hostname);
2155 #endif /* HAVE_GETHOSTNAME */
2160 for (i = 0, p = XSTRING_DATA(Vsystem_name);
2161 i < XSTRING_LENGTH(Vsystem_name); i++, p++) {
2162 if (*p == ' ' || *p == '\t')
2168 /************************************************************************/
2169 /* Emulation of select() */
2170 /************************************************************************/
2174 ERROR:XEmacs requires a working select().
2175 #endif /* not HAVE_SELECT */
2176 \f/************************************************************************/
2177 /* Emulation of signal stuff */
2178 /************************************************************************/
2179 /* BSD 4.1 crap deleted. 4.2 was released in 1983, for God's sake! I
2180 can't imagine that anyone is actually running that OS any more.
2181 You can't use X under it (I think) because there's no select().
2182 Anyway, the signal stuff has all been changed. If someone wants to
2183 get this stuff working again, look in the FSF Emacs sources. */
2184 /* POSIX signals support - DJB */
2185 #ifdef HAVE_SIGPROCMASK
2186 /* #### Is there any reason this is static global rather than local? */
2187 static struct sigaction new_action, old_action;
2189 signal_handler_t sys_do_signal(int signal_number, signal_handler_t action)
2193 /* XEmacs works better if system calls are *not* restarted.
2194 This allows C-g to interrupt reads and writes, on most systems.
2196 #### Another possibility is to just longjmp() out of the signal
2197 handler. According to W.R. Stevens, this should be OK on all
2198 systems. However, I don't want to deal with the potential
2199 evil ramifications of this at this point. */
2202 /* This gets us restartable system calls for efficiency.
2203 The "else" code will work as well. */
2204 return (berk_signal(signal_number, action));
2206 sigemptyset(&new_action.sa_mask);
2207 new_action.sa_handler = action;
2208 #if defined (SA_RESTART)
2209 /* Emacs mostly works better with restartable system services. If this
2210 * flag exists, we probably want to turn it on here.
2212 new_action.sa_flags = SA_RESTART;
2214 new_action.sa_flags = 0;
2216 sigaction(signal_number, &new_action, &old_action);
2217 return (old_action.sa_handler);
2222 sigemptyset(&new_action.sa_mask);
2223 new_action.sa_handler = action;
2224 #if defined (SA_INTERRUPT) /* don't restart system calls, under SunOS */
2225 new_action.sa_flags = SA_INTERRUPT;
2227 new_action.sa_flags = 0;
2229 sigaction(signal_number, &new_action, &old_action);
2230 return (signal_handler_t) (old_action.sa_handler);
2235 #elif defined (HAVE_SIGBLOCK)
2236 /* We use sigvec() rather than signal() if we have it, because
2237 it lets us specify interruptible system calls. */
2238 signal_handler_t sys_do_signal(int signal_number, signal_handler_t action)
2240 struct sigvec vec, ovec;
2242 vec.sv_handler = action;
2244 #ifdef SV_INTERRUPT /* don't restart system calls */
2245 vec.sv_flags = SV_INTERRUPT;
2250 sigvec(signal_number, &vec, &ovec);
2252 return (ovec.sv_handler);
2255 #endif /* HAVE_SIGBLOCK (HAVE_SIGPROCMASK) */
2257 /************************************************************************/
2258 /* Emulation of strerror() and errno support */
2259 /************************************************************************/
2261 #ifndef HAVE_STRERROR
2263 #if !defined(NeXT) && !defined(__alpha) && !defined(MACH) && !defined(LINUX) && !defined(IRIX) && !defined(__NetBSD__)
2264 /* Linux added here by Raymond L. Toy <toy@alydar.crd.ge.com> for XEmacs. */
2265 /* Irix added here by gparker@sni-usa.com for XEmacs. */
2266 /* NetBSD added here by James R Grinter <jrg@doc.ic.ac.uk> for XEmacs */
2267 extern const char *sys_errlist[];
2268 extern int sys_nerr;
2272 extern char *sys_errlist[];
2273 extern int sys_nerr;
2276 const char *strerror(int errnum)
2278 if (errnum >= 0 && errnum < sys_nerr)
2279 return sys_errlist[errnum];
2280 return ((const char *)GETTEXT("Unknown error"));
2283 #endif /* ! HAVE_STRERROR */
2285 /************************************************************************/
2286 /* Encapsulations of system calls */
2287 /************************************************************************/
2289 #define PATHNAME_CONVERT_OUT(path, pathout) \
2290 TO_EXTERNAL_FORMAT(C_STRING, (path), \
2291 C_STRING_ALLOCA, (pathout), \
2294 /***************** low-level calls ****************/
2297 * On USG systems the system calls are INTERRUPTIBLE by signals
2298 * that the user program has elected to catch. Thus the system call
2299 * must be retried in these cases. To handle this without massive
2300 * changes in the source code, we remap the standard system call names
2301 * to names for our own functions in sysdep.c that do the system call
2302 * with retries. Actually, for portability reasons, it is good
2303 * programming practice, as this example shows, to limit all actual
2304 * system calls to a single occurrence in the source. Sure, this
2305 * adds an extra level of function call overhead but it is almost
2306 * always negligible. Fred Fish, Unisoft Systems Inc.
2309 /* Ben sez: read Dick Gabriel's essay about the Worse Is Better
2310 approach to programming and its connection to the silly
2311 interruptible-system-call business. To find it, look on
2312 Jamie's home page (http://www.jwz.org/worse-is-better.html). */
2314 #ifdef ENCAPSULATE_OPEN
2316 int raw_open(const char *path, int oflag, ...)
2321 va_start(ap, oflag);
2322 mode = va_arg(ap, int);
2324 return open(path, oflag, mode);
2327 int sys_open(const char *path, int oflag, ...)
2333 va_start(ap, oflag);
2334 mode = va_arg(ap, int);
2337 PATHNAME_CONVERT_OUT(path, pout);
2339 #ifdef INTERRUPTIBLE_OPEN
2342 while ((rtnval = open(pout, oflag, mode)) == -1
2343 && (errno == EINTR))
2348 return open(pout, oflag, mode);
2351 #endif /* ENCAPSULATE_OPEN */
2353 /* Like sys_open, only when open() is interrupted by EINTR, check for
2354 QUIT. This allows the callers of this function to be interrupted
2355 with C-g when, say, reading from named pipes. However, this should
2356 be used with caution, as it can GC.
2358 This function will not function as expected on systems where open()
2359 is not interrupted by C-g. However, the worst that can happen is
2360 the fallback to simple open(). */
2361 int interruptible_open(const char *path, int oflag, int mode)
2363 /* This function can GC */
2366 PATHNAME_CONVERT_OUT(path, nrout);
2369 int rtnval = open(nrout, oflag, mode);
2370 if (!(rtnval == -1 && errno == EINTR))
2372 /* open() was interrupted. Was QUIT responsible? */
2377 #ifdef ENCAPSULATE_CLOSE
2378 int sys_close(int filedes)
2380 #ifdef INTERRUPTIBLE_CLOSE
2382 REGISTER int rtnval;
2384 while ((rtnval = close(filedes)) == -1 && (errno == EINTR))
2387 /* If close is interrupted SunOS 4.1 may or may not have closed the
2388 file descriptor. If it did the second close will fail with
2389 errno = EBADF. That means we have succeeded. */
2390 if (rtnval == -1 && did_retry && errno == EBADF)
2395 return close(filedes);
2398 #endif /* ENCAPSULATE_CLOSE */
2400 ssize_t sys_read_1(int fildes, void *buf, size_t nbyte, int allow_quit)
2404 /* No harm in looping regardless of the INTERRUPTIBLE_IO setting. */
2405 while ((rtnval = read(fildes, buf, nbyte)) == -1 && (errno == EINTR)) {
2412 #ifdef ENCAPSULATE_READ
2413 ssize_t sys_read(int fildes, void *buf, size_t nbyte)
2415 return sys_read_1(fildes, buf, nbyte, 0);
2417 #endif /* ENCAPSULATE_READ */
2419 ssize_t sys_write_1(int fildes, const void *buf, size_t nbyte, int allow_quit)
2421 ssize_t bytes_written = 0;
2422 const char *b = (const char *)buf;
2424 /* No harm in looping regardless of the INTERRUPTIBLE_IO setting. */
2426 ssize_t rtnval = write(fildes, b, nbyte);
2435 return bytes_written ? bytes_written : -1;
2439 bytes_written += rtnval;
2441 return bytes_written;
2444 #ifdef ENCAPSULATE_WRITE
2445 ssize_t sys_write(int fildes, const void *buf, size_t nbyte)
2447 return sys_write_1(fildes, buf, nbyte, 0);
2449 #endif /* ENCAPSULATE_WRITE */
2451 /**************** stdio calls ****************/
2453 /* There is at least some evidence that the stdio calls are interruptible
2454 just like the normal system calls, at least on some systems. In any
2455 case, it doesn't hurt to encapsulate them. */
2457 /* #### Should also encapsulate fflush().
2458 #### Should conceivably encapsulate getchar() etc. What a pain! */
2460 #ifdef ENCAPSULATE_FOPEN
2461 FILE *sys_fopen(const char *path, const char *type)
2465 PATHNAME_CONVERT_OUT(path, pout);
2466 #if defined (INTERRUPTIBLE_OPEN)
2469 while (!(rtnval = fopen(pout, type)) && (errno == EINTR))
2474 return fopen(pout, type);
2477 #endif /* ENCAPSULATE_FOPEN */
2479 #ifdef ENCAPSULATE_FCLOSE
2480 int sys_fclose(FILE * stream)
2482 #ifdef INTERRUPTIBLE_CLOSE
2483 int fd = fileno(stream);
2484 int rtnval = fclose(stream);
2486 if (rtnval == EOF && (errno == EINTR))
2487 while (((rtnval=close(fd))<0) && (errno == EINTR));
2490 return fclose(stream);
2493 #endif /* ENCAPSULATE_FCLOSE */
2495 #ifdef ENCAPSULATE_FREAD
2496 size_t sys_fread(void *ptr, size_t size, size_t nitem, FILE * stream)
2498 #ifdef INTERRUPTIBLE_IO
2500 size_t items_read = 0;
2501 char *b = (char *)ptr;
2504 rtnval = fread(b, size, nitem, stream);
2506 if (ferror(stream) && errno == EINTR)
2513 items_read += rtnval;
2515 return (items_read);
2517 return fread(ptr, size, nitem, stream);
2520 #endif /* ENCAPSULATE_FREAD */
2522 #ifdef ENCAPSULATE_FWRITE
2523 size_t sys_fwrite(const void *ptr, size_t size, size_t nitem, FILE * stream)
2525 #ifdef INTERRUPTIBLE_IO
2527 size_t items_written = 0;
2528 const char *b = (const char *)ptr;
2531 rtnval = fwrite(b, size, nitem, stream);
2533 if (ferror(stream) && errno == EINTR)
2536 return items_written;
2540 items_written += rtnval;
2542 return (items_written);
2544 return fwrite(ptr, size, nitem, stream);
2547 #endif /* ENCAPSULATE_FWRITE */
2549 /********************* directory calls *******************/
2551 #ifdef ENCAPSULATE_CHDIR
2552 int sys_chdir(const char *path)
2555 PATHNAME_CONVERT_OUT(path, pout);
2558 #endif /* ENCAPSULATE_CHDIR */
2560 #ifdef ENCAPSULATE_MKDIR
2561 int sys_mkdir(const char *path, mode_t mode)
2564 PATHNAME_CONVERT_OUT(path, pout);
2565 return mkdir(pout, mode);
2567 #endif /* ENCAPSULATE_MKDIR */
2569 #ifdef ENCAPSULATE_OPENDIR
2570 DIR *sys_opendir(const char *filename)
2574 PATHNAME_CONVERT_OUT(filename, fout);
2576 while (!(rtnval = opendir(fout))
2577 && (errno == EINTR)) ;
2580 #endif /* ENCAPSULATE_OPENDIR */
2582 #ifdef ENCAPSULATE_READDIR
2583 DIRENTRY *sys_readdir(DIR * dirp)
2587 /* Apparently setting errno is necessary on some systems?
2588 Maybe readdir() doesn't always set errno ?! */
2589 while (!(errno = 0, rtnval = readdir(dirp))
2590 && (errno == EINTR)) ;
2594 if (rtnval == NULL) /* End of directory */
2597 const Extbyte *const external_name =
2598 (const Extbyte *)rtnval->d_name;
2599 Extcount external_len = strlen(rtnval->d_name);
2600 const Bufbyte *internal_name;
2601 Bytecount internal_len;
2603 TO_INTERNAL_FORMAT(DATA, (external_name, external_len),
2604 ALLOCA, (internal_name, internal_len),
2607 /* check for common case of ASCII filename */
2608 if (internal_len == external_len &&
2609 !memcmp(external_name, internal_name, internal_len))
2612 { /* Non-ASCII filename */
2613 static Bufbyte_dynarr *internal_DIRENTRY;
2614 if (!internal_DIRENTRY)
2615 internal_DIRENTRY = Dynarr_new(Bufbyte);
2617 Dynarr_reset(internal_DIRENTRY);
2619 Dynarr_add_many(internal_DIRENTRY, (Bufbyte *) rtnval,
2620 offsetof(DIRENTRY, d_name));
2622 Dynarr_add_many(internal_DIRENTRY, internal_name,
2624 Dynarr_add(internal_DIRENTRY, '\0'); /* NUL-terminate */
2625 return (DIRENTRY *) Dynarr_atp(internal_DIRENTRY, 0);
2630 #endif /* ENCAPSULATE_READDIR */
2632 #ifdef ENCAPSULATE_CLOSEDIR
2633 int sys_closedir(DIR * dirp)
2637 while ((rtnval = closedir(dirp)) == -1 && (errno == EINTR)) ;
2640 #endif /* ENCAPSULATE_CLOSEDIR */
2642 #ifdef ENCAPSULATE_RMDIR
2643 int sys_rmdir(const char *path)
2646 PATHNAME_CONVERT_OUT(path, pout);
2649 #endif /* ENCAPSULATE_RMDIR */
2651 /***************** file-information calls ******************/
2653 #ifdef ENCAPSULATE_ACCESS
2654 int sys_access(const char *path, int mode)
2657 PATHNAME_CONVERT_OUT(path, pout);
2658 return access(pout, mode);
2660 #endif /* ENCAPSULATE_ACCESS */
2663 #ifdef ENCAPSULATE_EACCESS
2664 int sys_eaccess(const char *path, int mode)
2667 PATHNAME_CONVERT_OUT(path, pout);
2668 return eaccess(pout, mode);
2670 #endif /* ENCAPSULATE_EACCESS */
2671 #endif /* HAVE_EACCESS */
2673 #ifdef ENCAPSULATE_LSTAT
2674 int sys_lstat(const char *path, struct stat *buf)
2677 PATHNAME_CONVERT_OUT(path, pout);
2678 return lstat(pout, buf);
2680 #endif /* ENCAPSULATE_LSTAT */
2682 #ifdef ENCAPSULATE_READLINK
2683 int sys_readlink(const char *path, char *buf, size_t bufsiz)
2686 PATHNAME_CONVERT_OUT(path, pout);
2687 /* #### currently we don't do conversions on the incoming data */
2688 return readlink(pout, buf, bufsiz);
2690 #endif /* ENCAPSULATE_READLINK */
2692 #ifdef ENCAPSULATE_FSTAT
2693 int sys_fstat(int fd, struct stat *buf)
2695 return fstat(fd, buf);
2697 #endif /* ENCAPSULATE_FSTAT */
2699 int sxemacs_stat(const char *path, struct stat *buf)
2702 PATHNAME_CONVERT_OUT(path, pout);
2703 return stat(pout, buf);
2706 /****************** file-manipulation calls *****************/
2708 #ifdef ENCAPSULATE_CHMOD
2709 int sys_chmod(const char *path, mode_t mode)
2712 PATHNAME_CONVERT_OUT(path, pout);
2713 return chmod(pout, mode);
2715 #endif /* ENCAPSULATE_CHMOD */
2717 #ifdef ENCAPSULATE_CREAT
2718 int sys_creat(const char *path, mode_t mode)
2721 PATHNAME_CONVERT_OUT(path, pout);
2722 return creat(pout, mode);
2724 #endif /* ENCAPSULATE_CREAT */
2726 #ifdef ENCAPSULATE_LINK
2727 int sys_link(const char *existing, const char *new)
2730 PATHNAME_CONVERT_OUT(existing, eout);
2731 PATHNAME_CONVERT_OUT(new, nout);
2732 return link(eout, nout);
2734 #endif /* ENCAPSULATE_LINK */
2736 #ifdef ENCAPSULATE_RENAME
2737 int sys_rename(const char *old, const char *new)
2740 PATHNAME_CONVERT_OUT(old, oout);
2741 PATHNAME_CONVERT_OUT(new, nout);
2742 return rename(oout, nout);
2744 #endif /* ENCAPSULATE_RENAME */
2746 #ifdef ENCAPSULATE_SYMLINK
2747 int sys_symlink(const char *name1, const char *name2)
2749 char *n1out, *n2out;
2750 PATHNAME_CONVERT_OUT(name1, n1out);
2751 PATHNAME_CONVERT_OUT(name2, n2out);
2752 return symlink(n1out, n2out);
2754 #endif /* ENCAPSULATE_SYMLINK */
2756 #ifdef ENCAPSULATE_UNLINK
2757 int sys_unlink(const char *path)
2760 PATHNAME_CONVERT_OUT(path, pout);
2761 return unlink(pout);
2763 #endif /* ENCAPSULATE_UNLINK */
2765 #ifdef ENCAPSULATE_EXECVP
2766 int sys_execvp(const char *path, char *const *argv)
2771 PATHNAME_CONVERT_OUT(path, pout);
2772 for (argc = 0; argv[argc]; argc++);
2775 char *new_argv[argc+1];
2776 for (i = 0; i < argc; i++) {
2777 PATHNAME_CONVERT_OUT(argv[i], new_argv[i]);
2779 new_argv[argc] = NULL;
2780 return execvp(pout, new_argv);
2783 #endif /* ENCAPSULATE_EXECVP */
2785 /************************************************************************/
2786 /* Emulations of missing system calls */
2787 /************************************************************************/
2789 /***** (these are primarily required for USG, it seems) *****/
2792 char *getcwd(char *pathname, size_t size)
2794 return getwd(pathname);
2796 #endif /* emulate getcwd */
2800 * Emulate rename using unlink/link. Note that this is
2801 * only partially correct. Also, doesn't enforce restriction
2802 * that files be of same type (regular->regular, dir->dir, etc).
2806 int rename(const char *from, const char *to)
2808 if (access(from, 0) == 0) {
2810 if (link(from, to) == 0)
2811 if (unlink(from) == 0)
2816 #endif /* HAVE_RENAME */
2821 /* HPUX curses library references perror, but as far as we know
2822 it won't be called. Anyway this definition will do for now. */
2828 #endif /* not HAVE_PERROR */
2834 * Emulate BSD dup2. First close newd if it already exists.
2835 * Then, attempt to dup oldd. If not successful, call dup2 recursively
2836 * until we are, then close the unsuccessful ones.
2839 int dup2(int oldd, int newd)
2846 fd = fcntl(oldd, F_DUPFD, newd);
2848 error("can't dup2 (%i,%i) : %s", oldd, newd, strerror(errno));
2855 ret = dup2(old, new);
2858 #endif /* F_DUPFD */
2861 #endif /* not HAVE_DUP2 */
2864 * Gettimeofday. Simulate as much as possible. Only accurate
2865 * to nearest second. Emacs doesn't use tzp so ignore it for now.
2868 #if !defined (HAVE_GETTIMEOFDAY)
2870 int gettimeofday(struct timeval *tp, struct timezone *tzp)
2874 tp->tv_sec = time((long *)0);
2877 tzp->tz_minuteswest = -1;
2881 #endif /* !HAVE_GETTIMEOFDAY */
2883 /* No need to encapsulate utime and utimes explicitly because all
2884 access to those functions goes through the following. */
2886 int set_file_times(Lisp_Object path, EMACS_TIME atime, EMACS_TIME mtime)
2888 #if defined (HAVE_UTIME)
2891 utb.actime = EMACS_SECS(atime);
2892 utb.modtime = EMACS_SECS(mtime);
2893 LISP_STRING_TO_EXTERNAL(path, filename, Qfile_name);
2894 return utime(filename, &utb);
2895 #elif defined (HAVE_UTIMES)
2896 struct timeval tv[2];
2900 LISP_STRING_TO_EXTERNAL(path, filename, Qfile_name);
2901 return utimes(filename, tv);
2903 /* No file times setting function available. */
2910 static long ticks_per_second;
2911 static long orig_user_ticks, orig_system_ticks;
2912 EMACS_TIME orig_real_time;
2914 static int process_times_available;
2916 /* Return the relative user and system tick count. We try to
2917 maintain calculations in terms of integers as long as possible
2918 for increased accuracy. */
2920 static int get_process_times_1(long *user_ticks, long *system_ticks)
2922 #if defined (_SC_CLK_TCK) || defined (CLK_TCK)
2923 /* We have the POSIX times() function available. */
2926 *user_ticks = (long)tttt.tms_utime;
2927 *system_ticks = (long)tttt.tms_stime;
2929 #elif defined (CLOCKS_PER_SEC)
2930 *user_ticks = (long)clock();
2938 void init_process_times_very_early(void)
2940 #if defined (_SC_CLK_TCK)
2941 ticks_per_second = sysconf(_SC_CLK_TCK);
2942 #elif defined (CLK_TCK)
2943 ticks_per_second = CLK_TCK;
2944 #elif defined (CLOCKS_PER_SEC)
2945 ticks_per_second = CLOCKS_PER_SEC;
2948 process_times_available = get_process_times_1(&orig_user_ticks,
2949 &orig_system_ticks);
2950 EMACS_GET_TIME(orig_real_time);
2953 /* Return the user and system times used up by this process so far. */
2955 get_process_times(double *user_time, double *system_time, double *real_time)
2957 EMACS_TIME curr_real_time;
2958 EMACS_TIME elapsed_time;
2959 long curr_user_ticks, curr_system_ticks;
2961 EMACS_GET_TIME(curr_real_time);
2962 EMACS_SUB_TIME(elapsed_time, curr_real_time, orig_real_time);
2963 *real_time = (EMACS_SECS(elapsed_time)
2964 + ((double)EMACS_USECS(elapsed_time)) / 1000000);
2965 if (get_process_times_1(&curr_user_ticks, &curr_system_ticks)) {
2966 *user_time = (((double)(curr_user_ticks - orig_user_ticks))
2967 / ticks_per_second);
2969 (((double)(curr_system_ticks - orig_system_ticks))
2970 / ticks_per_second);
2973 *user_time = *real_time;
2984 #if defined HAVE_MPZ && (defined WITH_GMP || defined WITH_MP)
2985 # include "ent/ent-gmp.h"
2986 #endif /* MPZ && (GMP || MP) */
2988 /* Figure out how many bits the system's random number generator uses.
2989 `random' and `lrand48' are assumed to return 31 usable bits.
2990 BSD `rand' returns a 31 bit value but the low order bits are unusable;
2991 so we'll shift it and treat it like the 15-bit USG `rand'. */
2995 # define RAND_BITS 31
2996 # else /* !HAVE_RANDOM */
2997 # ifdef HAVE_LRAND48
2998 # define RAND_BITS 31
2999 # define random lrand48
3000 # else /* !HAVE_LRAND48 */
3001 # define RAND_BITS 15
3002 # if RAND_MAX == 32767
3003 # define random rand
3004 # else /* RAND_MAX != 32767 */
3005 # if RAND_MAX == 2147483647
3006 # define random() (rand () >> 16)
3007 # else /* RAND_MAX != 2147483647 */
3009 # define random rand
3011 # define random() (rand () >> 16)
3013 # endif /* RAND_MAX != 2147483647 */
3014 # endif /* RAND_MAX != 32767 */
3015 # endif /* !HAVE_LRAND48 */
3016 # endif /* !HAVE_RANDOM */
3017 #endif /* !RAND_BITS */
3019 void seed_random(long arg);
3020 void seed_random(long arg)
3023 srandom((unsigned int)arg);
3025 # ifdef HAVE_LRAND48
3028 srand((unsigned int)arg);
3031 #if defined HAVE_MPZ && (defined WITH_GMP || defined WITH_MP)
3032 bigz_random_seed((unsigned long)arg);
3037 * Build a full Emacs-sized word out of whatever we've got.
3038 * This suffices even for a 64-bit architecture with a 15-bit rand.
3040 long get_random(void);
3041 long get_random(void)
3043 long val = random();
3044 #if INT_VALBITS > RAND_BITS
3045 val = (val << RAND_BITS) ^ random();
3046 #if INT_VALBITS > 2*RAND_BITS
3047 val = (val << RAND_BITS) ^ random();
3048 #if INT_VALBITS > 3*RAND_BITS
3049 val = (val << RAND_BITS) ^ random();
3050 #if INT_VALBITS > 4*RAND_BITS
3051 val = (val << RAND_BITS) ^ random();
3052 #endif /* need at least 5 */
3053 #endif /* need at least 4 */
3054 #endif /* need at least 3 */
3055 #endif /* need at least 2 */
3056 return val & (EMACS_INT) ((1UL << INT_VALBITS) - 1);
3059 /************************************************************************/
3060 /* Strings corresponding to defined signals */
3061 /************************************************************************/
3063 #if !defined (SYS_SIGLIST_DECLARED) && !defined (HAVE_SYS_SIGLIST) && !defined(HAVE_DECL_SYS_SIGLIST)
3067 #define SXE_SYS_SIGLIST_DECLARED 1
3068 const char *sys_siglist[NSIG + 1] = {
3069 /* AIX has changed the signals a bit */
3070 DEFER_GETTEXT("bogus signal"), /* 0 */
3071 DEFER_GETTEXT("hangup"), /* 1 SIGHUP */
3072 DEFER_GETTEXT("interrupt"), /* 2 SIGINT */
3073 DEFER_GETTEXT("quit"), /* 3 SIGQUIT */
3074 DEFER_GETTEXT("illegal instruction"), /* 4 SIGILL */
3075 DEFER_GETTEXT("trace trap"), /* 5 SIGTRAP */
3076 DEFER_GETTEXT("IOT instruction"), /* 6 SIGIOT */
3077 DEFER_GETTEXT("crash likely"), /* 7 SIGDANGER */
3078 DEFER_GETTEXT("floating point exception"), /* 8 SIGFPE */
3079 DEFER_GETTEXT("kill"), /* 9 SIGKILL */
3080 DEFER_GETTEXT("bus error"), /* 10 SIGBUS */
3081 DEFER_GETTEXT("segmentation violation"), /* 11 SIGSEGV */
3082 DEFER_GETTEXT("bad argument to system call"), /* 12 SIGSYS */
3083 DEFER_GETTEXT("write on a pipe with no one to read it"), /* 13 SIGPIPE */
3084 DEFER_GETTEXT("alarm clock"), /* 14 SIGALRM */
3085 DEFER_GETTEXT("software termination signal"), /* 15 SIGTERM */
3086 DEFER_GETTEXT("user defined signal 1"), /* 16 SIGUSR1 */
3087 DEFER_GETTEXT("user defined signal 2"), /* 17 SIGUSR2 */
3088 DEFER_GETTEXT("death of a child"), /* 18 SIGCLD */
3089 DEFER_GETTEXT("power-fail restart"), /* 19 SIGPWR */
3090 DEFER_GETTEXT("bogus signal"), /* 20 */
3091 DEFER_GETTEXT("bogus signal"), /* 21 */
3092 DEFER_GETTEXT("bogus signal"), /* 22 */
3093 DEFER_GETTEXT("bogus signal"), /* 23 */
3094 DEFER_GETTEXT("bogus signal"), /* 24 */
3095 DEFER_GETTEXT("LAN I/O interrupt"), /* 25 SIGAIO */
3096 DEFER_GETTEXT("PTY I/O interrupt"), /* 26 SIGPTY */
3097 DEFER_GETTEXT("I/O intervention required"), /* 27 SIGIOINT */
3099 DEFER_GETTEXT("HFT grant"), /* 28 SIGGRANT */
3100 DEFER_GETTEXT("HFT retract"), /* 29 SIGRETRACT */
3101 DEFER_GETTEXT("HFT sound done"), /* 30 SIGSOUND */
3102 DEFER_GETTEXT("HFT input ready"), /* 31 SIGMSG */
3106 #else /* USG, not AIX */
3107 #define SXE_SYS_SIGLIST_DECLARED 1
3108 const char *sys_siglist[NSIG + 1] = {
3109 DEFER_GETTEXT("bogus signal"), /* 0 */
3110 DEFER_GETTEXT("hangup"), /* 1 SIGHUP */
3111 DEFER_GETTEXT("interrupt"), /* 2 SIGINT */
3112 DEFER_GETTEXT("quit"), /* 3 SIGQUIT */
3113 DEFER_GETTEXT("illegal instruction"), /* 4 SIGILL */
3114 DEFER_GETTEXT("trace trap"), /* 5 SIGTRAP */
3115 DEFER_GETTEXT("IOT instruction"), /* 6 SIGIOT */
3116 DEFER_GETTEXT("EMT instruction"), /* 7 SIGEMT */
3117 DEFER_GETTEXT("floating point exception"), /* 8 SIGFPE */
3118 DEFER_GETTEXT("kill"), /* 9 SIGKILL */
3119 DEFER_GETTEXT("bus error"), /* 10 SIGBUS */
3120 DEFER_GETTEXT("segmentation violation"), /* 11 SIGSEGV */
3121 DEFER_GETTEXT("bad argument to system call"), /* 12 SIGSYS */
3122 DEFER_GETTEXT("write on a pipe with no one to read it"), /* 13 SIGPIPE */
3123 DEFER_GETTEXT("alarm clock"), /* 14 SIGALRM */
3124 DEFER_GETTEXT("software termination signal"), /* 15 SIGTERM */
3125 DEFER_GETTEXT("user defined signal 1"), /* 16 SIGUSR1 */
3126 DEFER_GETTEXT("user defined signal 2"), /* 17 SIGUSR2 */
3127 DEFER_GETTEXT("death of a child"), /* 18 SIGCLD */
3128 DEFER_GETTEXT("power-fail restart"), /* 19 SIGPWR */
3130 DEFER_GETTEXT("window size changed"), /* 20 SIGWINCH */
3131 DEFER_GETTEXT("urgent socket condition"), /* 21 SIGURG */
3132 DEFER_GETTEXT("pollable event occurred"), /* 22 SIGPOLL */
3133 DEFER_GETTEXT("stop (cannot be caught or ignored)"), /* 23 SIGSTOP */
3134 DEFER_GETTEXT("user stop requested from tty"), /* 24 SIGTSTP */
3135 DEFER_GETTEXT("stopped process has been continued"), /* 25 SIGCONT */
3136 DEFER_GETTEXT("background tty read attempted"), /* 26 SIGTTIN */
3137 DEFER_GETTEXT("background tty write attempted"), /* 27 SIGTTOU */
3138 DEFER_GETTEXT("virtual timer expired"), /* 28 SIGVTALRM */
3139 DEFER_GETTEXT("profiling timer expired"), /* 29 SIGPROF */
3140 DEFER_GETTEXT("exceeded cpu limit"), /* 30 SIGXCPU */
3141 DEFER_GETTEXT("exceeded file size limit"), /* 31 SIGXFSZ */
3142 DEFER_GETTEXT("process's lwps are blocked"), /* 32 SIGWAITING */
3143 DEFER_GETTEXT("special signal used by thread library"), /* 33 SIGLWP */
3145 DEFER_GETTEXT("special signal used by CPR"), /* 34 SIGFREEZE */
3148 DEFER_GETTEXT("special signal used by CPR"), /* 35 SIGTHAW */
3153 #endif /* not AIX */
3156 #define SXE_SYS_SIGLIST_DECLARED 1
3157 const char *sys_siglist[NSIG + 1] = {
3158 DEFER_GETTEXT("null signal"), /* 0 SIGNULL */
3159 DEFER_GETTEXT("hangup"), /* 1 SIGHUP */
3160 DEFER_GETTEXT("interrupt"), /* 2 SIGINT */
3161 DEFER_GETTEXT("quit"), /* 3 SIGQUIT */
3162 DEFER_GETTEXT("illegal instruction"), /* 4 SIGILL */
3163 DEFER_GETTEXT("trace trap"), /* 5 SIGTRAP */
3164 DEFER_GETTEXT("abort termination"), /* 6 SIGABRT */
3165 DEFER_GETTEXT("SIGEMT"), /* 7 SIGEMT */
3166 DEFER_GETTEXT("floating point exception"), /* 8 SIGFPE */
3167 DEFER_GETTEXT("kill"), /* 9 SIGKILL */
3168 DEFER_GETTEXT("bus error"), /* 10 SIGBUS */
3169 DEFER_GETTEXT("segmentation violation"), /* 11 SIGSEGV */
3170 DEFER_GETTEXT("bad argument to system call"), /* 12 SIGSYS */
3171 DEFER_GETTEXT("write on a pipe with no reader"), /* 13 SIGPIPE */
3172 DEFER_GETTEXT("alarm clock"), /* 14 SIGALRM */
3173 DEFER_GETTEXT("software termination signal"), /* 15 SIGTERM */
3174 DEFER_GETTEXT("user defined signal 1"), /* 16 SIGUSR1 */
3175 DEFER_GETTEXT("user defined signal 2"), /* 17 SIGUSR2 */
3176 DEFER_GETTEXT("child stopped or terminated"), /* 18 SIGCLD */
3177 DEFER_GETTEXT("power-fail restart"), /* 19 SIGPWR */
3178 DEFER_GETTEXT("window size changed"), /* 20 SIGWINCH */
3179 DEFER_GETTEXT("undefined"), /* 21 */
3180 DEFER_GETTEXT("pollable event occurred"), /* 22 SIGPOLL */
3181 DEFER_GETTEXT("sendable stop signal not from tty"), /* 23 SIGSTOP */
3182 DEFER_GETTEXT("stop signal from tty"), /* 24 SIGSTP */
3183 DEFER_GETTEXT("continue a stopped process"), /* 25 SIGCONT */
3184 DEFER_GETTEXT("attempted background tty read"), /* 26 SIGTTIN */
3185 DEFER_GETTEXT("attempted background tty write"), /* 27 SIGTTOU */
3186 DEFER_GETTEXT("undefined"), /* 28 */
3187 DEFER_GETTEXT("undefined"), /* 29 */
3188 DEFER_GETTEXT("undefined"), /* 30 */
3189 DEFER_GETTEXT("undefined"), /* 31 */
3190 DEFER_GETTEXT("undefined"), /* 32 */
3191 DEFER_GETTEXT("socket (TCP/IP) urgent data arrival"), /* 33 SIGURG */
3192 DEFER_GETTEXT("I/O is possible"), /* 34 SIGIO */
3193 DEFER_GETTEXT("exceeded cpu time limit"), /* 35 SIGXCPU */
3194 DEFER_GETTEXT("exceeded file size limit"), /* 36 SIGXFSZ */
3195 DEFER_GETTEXT("virtual time alarm"), /* 37 SIGVTALRM */
3196 DEFER_GETTEXT("profiling time alarm"), /* 38 SIGPROF */
3197 DEFER_GETTEXT("undefined"), /* 39 */
3198 DEFER_GETTEXT("file record locks revoked"), /* 40 SIGLOST */
3199 DEFER_GETTEXT("undefined"), /* 41 */
3200 DEFER_GETTEXT("undefined"), /* 42 */
3201 DEFER_GETTEXT("undefined"), /* 43 */
3202 DEFER_GETTEXT("undefined"), /* 44 */
3203 DEFER_GETTEXT("undefined"), /* 45 */
3204 DEFER_GETTEXT("undefined"), /* 46 */
3205 DEFER_GETTEXT("undefined"), /* 47 */
3206 DEFER_GETTEXT("undefined"), /* 48 */
3207 DEFER_GETTEXT("undefined"), /* 49 */
3208 DEFER_GETTEXT("undefined"), /* 50 */
3209 DEFER_GETTEXT("undefined"), /* 51 */
3210 DEFER_GETTEXT("undefined"), /* 52 */
3211 DEFER_GETTEXT("undefined"), /* 53 */
3212 DEFER_GETTEXT("undefined"), /* 54 */
3213 DEFER_GETTEXT("undefined"), /* 55 */
3214 DEFER_GETTEXT("undefined"), /* 56 */
3215 DEFER_GETTEXT("undefined"), /* 57 */
3216 DEFER_GETTEXT("undefined"), /* 58 */
3217 DEFER_GETTEXT("undefined"), /* 59 */
3218 DEFER_GETTEXT("undefined"), /* 60 */
3219 DEFER_GETTEXT("undefined"), /* 61 */
3220 DEFER_GETTEXT("undefined"), /* 62 */
3221 DEFER_GETTEXT("undefined"), /* 63 */
3222 DEFER_GETTEXT("notification message in mess. queue"), /* 64 SIGDGNOTIFY */
3227 #endif /* ! SYS_SIGLIST_DECLARED && ! HAVE_SYS_SIGLIST */
3229 /************************************************************************/
3230 /* Directory routines for systems that don't have them */
3231 /************************************************************************/
3233 #ifdef SYSV_SYSTEM_DIR
3237 #if defined(BROKEN_CLOSEDIR) || !defined(HAVE_CLOSEDIR)
3238 int closedir(DIR * dirp)
3239 { /* stream from opendir */
3242 rtnval = sys_close(dirp->dd_fd);
3244 /* Some systems (like Solaris) allocate the buffer and the DIR all
3245 in one block. Why in the world are we freeing this ourselves
3247 #if ! (defined (sun) && defined (USG5_4))
3248 xfree((char *)dirp->dd_buf); /* directory block defined in <dirent.h> */
3250 xfree((char *)dirp);
3253 #endif /* BROKEN_CLOSEDIR or not HAVE_CLOSEDIR */
3254 #endif /* SYSV_SYSTEM_DIR */
3256 #ifdef NONSYSTEM_DIR_LIBRARY
3258 DIR *opendir(const char *filename)
3259 { /* name of directory */
3260 DIR *dirp; /* -> malloc'ed storage */
3261 int fd; /* file descriptor for read */
3262 struct stat sbuf; /* result of fstat */
3264 fd = sys_open(filename, O_RDONLY);
3268 if (fstat(fd, &sbuf) < 0
3269 || (sbuf.st_mode & S_IFMT) != S_IFDIR
3270 || (dirp = xnew(DIR)) == 0) {
3272 return 0; /* bad luck today */
3276 dirp->dd_loc = dirp->dd_size = 0; /* refill needed */
3281 void closedir(DIR * dirp)
3282 { /* stream from opendir */
3283 sys_close(dirp->dd_fd);
3289 ino_t od_ino; /* inode */
3290 char od_name[DIRSIZ]; /* filename */
3293 static struct direct dir_static; /* simulated directory contents */
3296 struct direct *readdir(DIR * dirp)
3297 { /* stream from opendir */
3298 struct olddir *dp; /* -> directory data */
3301 if (dirp->dd_loc >= dirp->dd_size)
3302 dirp->dd_loc = dirp->dd_size = 0;
3304 if (dirp->dd_size == 0 /* refill buffer */
3306 sys_read(dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ)) <= 0)
3309 dp = (struct olddir *)&dirp->dd_buf[dirp->dd_loc];
3310 dirp->dd_loc += sizeof(struct olddir);
3312 if (dp->od_ino != 0) { /* not deleted entry */
3313 dir_static.d_ino = dp->od_ino;
3314 xstrncpy(dir_static.d_name, dp->od_name, DIRSIZ);
3315 dir_static.d_name[DIRSIZ] = '\0';
3316 dir_static.d_namlen = strlen(dir_static.d_name);
3317 dir_static.d_reclen = sizeof(struct direct)
3319 + dir_static.d_namlen - dir_static.d_namlen % 4;
3320 return &dir_static; /* -> simulated structure */
3325 #endif /* NONSYSTEM_DIR_LIBRARY */
3327 /* mkdir and rmdir functions, for systems which don't have them. */
3331 * Written by Robert Rother, Mariah Corporation, August 1985.
3333 * If you want it, it's yours. All I ask in return is that if you
3334 * figure out how to do this in a Bourne Shell script you send me
3336 * sdcsvax!rmr or rmr@uscd
3338 * Severely hacked over by John Gilmore to make a 4.2BSD compatible
3339 * subroutine. 11Mar86; hoptoad!gnu
3341 * Modified by rmtodd@uokmax 6-28-87 -- when making an already existing dir,
3342 * subroutine didn't return EEXIST. It does now.
3348 #ifdef MKDIR_PROTOTYPE
3351 int mkdir(const char *dpath, int dmode)
3354 int cpid, status, fd;
3355 struct stat statbuf;
3357 if (stat(dpath, &statbuf) == 0) { /* we do want stat() here */
3358 errno = EEXIST; /* Stat worked, so it already exists */
3362 /* If stat fails for a reason other than non-existence, return error */
3363 if (errno != ENOENT)
3366 synch_process_alive = 1;
3367 switch (cpid = fork()) {
3369 case -1: /* Error in fork() */
3370 return -1; /* Errno is set already */
3372 case 0: /* Child process */
3375 * Cheap hack to set mode of new directory. Since this
3376 * child process is going away anyway, we zap its umask.
3377 * ####, this won't suffice to set SUID, SGID, etc. on this
3378 * directory. Does anybody care?
3380 status = umask(0); /* Get current umask */
3381 status = umask(status | (0777 & ~dmode)); /* Set for mkdir */
3382 fd = sys_open("/dev/null", O_RDWR);
3384 if (fd != STDIN_FILENO)
3385 dup2(fd, STDIN_FILENO);
3386 if (fd != STDOUT_FILENO)
3387 dup2(fd, STDOUT_FILENO);
3388 if (fd != STDERR_FILENO)
3389 dup2(fd, STDERR_FILENO);
3391 execl("/bin/mkdir", "mkdir", dpath, (char *)0);
3392 _exit(-1); /* Can't exec /bin/mkdir */
3395 default: /* Parent process */
3396 wait_for_termination(cpid);
3399 if (synch_process_death != 0 || synch_process_retcode != 0) {
3400 errno = EIO; /* We don't know why, but */
3401 return -1; /* /bin/mkdir failed */
3406 #endif /* not HAVE_MKDIR */
3409 int rmdir(const char *dpath)
3411 int cpid, status, fd;
3412 struct stat statbuf;
3414 if (stat(dpath, &statbuf) != 0) { /* we do want stat() here */
3415 /* Stat just set errno. We don't have to */
3419 synch_process_alive = 1;
3420 switch (cpid = fork()) {
3422 case -1: /* Error in fork() */
3423 return (-1); /* Errno is set already */
3425 case 0: /* Child process */
3426 fd = sys_open("/dev/null", O_RDWR);
3428 if (fd != STDIN_FILENO)
3429 dup2(fd, STDIN_FILENO);
3430 if (fd != STDOUT_FILENO)
3431 dup2(fd, STDOUT_FILENO);
3432 if (fd != STDERR_FILENO)
3433 dup2(fd, STDERR_FILENO);
3435 execl("/bin/rmdir", "rmdir", dpath, (char *)0);
3436 _exit(-1); /* Can't exec /bin/mkdir */
3438 default: /* Parent process */
3439 wait_for_termination(cpid);
3442 if (synch_process_death != 0 || synch_process_retcode != 0) {
3443 errno = EIO; /* We don't know why, but */
3444 return -1; /* /bin/rmdir failed */
3449 #endif /* !HAVE_RMDIR */
3451 /************************************************************************/
3452 /* Misc. SunOS crap */
3453 /************************************************************************/
3457 /* These are included on Sunos 4.1 when we do not use shared libraries.
3458 X11 libraries may refer to these functions but (we hope) do not
3459 actually call them. */
3476 #endif /* USE_DL_STUBS */
3479 /* big dirname magic */
3481 #if !defined(HAVE_DIRNAME)
3482 /* some coreutils borrows here */
3484 x__dirname(restrict char *res, const char *file, size_t len);
3486 /* assumes res is malloc'd of size LEN (and >= xstrlen(file)) */
3487 size_t file_len = xstrlen(file);
3488 size_t offs = x__dirlen(file, file_len);
3489 int append_dot = (offs == 0);
3491 xmemcpy(dir, file, offs);
3497 #endif /* !HAVE_DIRNAME */
3499 /* sysdep.c ends here */