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"
46 #include "ui/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 struct console *con = XCONSOLE(DEVICE_CONSOLE(d));
810 if (DEVICE_WIN_P(d) || DEVICE_STREAM_P(d)) {
811 DEVICE_BAUD_RATE(d) = 38400;
815 assert(DEVICE_TTY_P(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 ioctl_status = ioctl(filedesc, FIOGSAIOOWN,
875 &DEVICE_OLD_FCNTL_OWNER(d));
876 ioctl_status = ioctl(filedesc, FIOSSAIOOWN, &owner);
878 #ifdef HAVE_WINDOW_SYSTEM
879 else if (!DEVICE_STREAM_P(d)) {
880 ioctl_status = ioctl(filedesc, SIOCGPGRP,
881 &DEVICE_OLD_FCNTL_OWNER(d));
882 ioctl_status = ioctl(filedesc, SIOCSPGRP, &owner);
886 #elif defined (F_SETOWN) && !defined (F_SETOWN_BUG)
887 DEVICE_OLD_FCNTL_OWNER(d) = fcntl(filedesc, F_GETOWN, 0);
888 # ifdef F_SETOWN_SOCK_NEG
889 /* stdin is a socket here */
890 fcntl(filedesc, F_SETOWN, -getpid());
892 fcntl(filedesc, F_SETOWN, getpid());
897 static void reset_sigio_on_device(struct device *d)
899 int filedesc = DEVICE_INFD(d);
901 #if defined (FIOSSAIOOWN)
904 if (DEVICE_TTY_P(d)) {
905 ioctl_status = ioctl(filedesc, FIOSSAIOOWN,
906 &DEVICE_OLD_FCNTL_OWNER(d));
908 #ifdef HAVE_WINDOW_SYSTEM
909 else if (!DEVICE_STREAM_P(d)) {
910 ioctl_status = ioctl(filedesc, SIOCSPGRP,
911 &DEVICE_OLD_FCNTL_OWNER(d));
915 #elif defined (F_SETOWN) && !defined (F_SETOWN_BUG)
916 fcntl(filedesc, F_SETOWN, DEVICE_OLD_FCNTL_OWNER(d));
920 static void request_sigio_on_device(struct device *d)
922 int filedesc = DEVICE_INFD(d);
924 #if defined (I_SETSIG) && !defined(HPUX10) && !defined(LINUX)
927 ioctl(filedesc, I_GETSIG, &events);
928 ioctl(filedesc, I_SETSIG, events | S_INPUT);
930 #elif defined (FASYNC)
931 fcntl(filedesc, F_SETFL, fcntl(filedesc, F_GETFL, 0) | FASYNC);
932 #elif defined (FIOSSAIOSTAT)
934 /* DG: Changed for HP-UX. HP-UX uses different IOCTLs for
935 sockets and other devices for some bizarre reason. We guess
936 that an X device is a socket, and tty devices aren't. We then
937 use the following crud to do the appropriate thing. */
939 int ioctl_status; /* ####DG: check if IOCTL succeeds here. */
941 if (DEVICE_TTY_P(d)) {
942 ioctl_status = ioctl(filedesc, FIOSSAIOSTAT, &on);
944 #ifdef HAVE_WINDOW_SYSTEM
945 else if (!DEVICE_STREAM_P(d)) {
946 ioctl_status = ioctl(filedesc, FIOASYNC, &on);
950 #elif defined (FIOASYNC)
953 ioctl(filedesc, FIOASYNC, &on);
957 #if defined (_CX_UX) /* #### Is this crap necessary? */
958 EMACS_UNBLOCK_SIGNAL(SIGIO);
962 static void unrequest_sigio_on_device(struct device *d)
964 int filedesc = DEVICE_INFD(d);
966 #if defined (I_SETSIG) && !defined(HPUX10)
969 ioctl(filedesc, I_GETSIG, &events);
970 ioctl(filedesc, I_SETSIG, events & ~S_INPUT);
972 #elif defined (FASYNC)
973 fcntl(filedesc, F_SETFL, fcntl(filedesc, F_GETFL, 0) & ~FASYNC);
974 #elif defined (FIOSSAIOSTAT)
976 /* DG: Changed for HP-UX. HP-UX uses different IOCTLs for
977 sockets and other devices for some bizarre reason. We guess
978 that an X device is a socket, and tty devices aren't. We then
979 use the following crud to do the appropriate thing. */
984 /* See comment for request_sigio_on_device */
986 if (DEVICE_TTY_P(d)) {
987 ioctl_status = ioctl(filedesc, FIOSSAIOSTAT, &off);
989 ioctl_status = ioctl(filedesc, FIOASYNC, &off);
992 #elif defined (FIOASYNC)
995 ioctl(filedesc, FIOASYNC, &off);
1000 void request_sigio(void)
1002 Lisp_Object devcons, concons;
1004 DEVICE_LOOP_NO_BREAK(devcons, concons) {
1007 d = XDEVICE(XCAR(devcons));
1009 if (!DEVICE_STREAM_P(d))
1010 request_sigio_on_device(d);
1014 void unrequest_sigio(void)
1016 Lisp_Object devcons, concons;
1018 DEVICE_LOOP_NO_BREAK(devcons, concons) {
1021 d = XDEVICE(XCAR(devcons));
1023 if (!DEVICE_STREAM_P(d))
1024 unrequest_sigio_on_device(d);
1030 /* ------------------------------------------------------ */
1031 /* Changing Emacs's process group */
1032 /* ------------------------------------------------------ */
1034 /* Saving and restoring the process group of Emacs's terminal. */
1036 /* On some systems, apparently (?!) Emacs must be in its own process
1037 group in order to receive SIGIO correctly. On other systems
1038 (e.g. Solaris), it's not required and doing it makes things
1039 get fucked up. So, we only do it when
1040 SIGIO_REQUIRES_SEPARATE_PROCESS_GROUP is defined. Basically,
1041 this is only required for BSD 4.2 systems. (Actually, I bet
1042 we don't have to do this at all -- those systems also
1043 required interrupt input, which we don't support.)
1045 If Emacs was in its own process group (i.e. inherited_pgroup ==
1046 getpid ()), then we know we're running under a shell with job
1047 control (Emacs would never be run as part of a pipeline).
1050 If Emacs was not in its own process group, then we know we're
1051 running under a shell (or a caller) that doesn't know how to
1052 separate itself from Emacs (like sh). Emacs must be in its own
1053 process group in order to receive SIGIO correctly. In this
1054 situation, we put ourselves in our own pgroup, forcibly set the
1055 tty's pgroup to our pgroup, and make sure to restore and reinstate
1056 the tty's pgroup just like any other terminal setting. If
1057 inherited_group was not the tty's pgroup, then we'll get a
1058 SIGTTmumble when we try to change the tty's pgroup, and a CONT if
1059 it goes foreground in the future, which is what should happen. */
1061 #ifdef SIGIO_REQUIRES_SEPARATE_PROCESS_GROUP
1063 static pid_t inherited_pgroup;
1064 static pid_t inherited_tty_pgroup;
1068 void munge_tty_process_group(void)
1070 #ifdef SIGIO_REQUIRES_SEPARATE_PROCESS_GROUP
1074 /* Only do this munging if we have a device on the controlling
1075 terminal. See the large comment below. */
1077 if (CONSOLEP(Vcontrolling_terminal) &&
1078 CONSOLE_LIVE_P(XCONSOLE(Vcontrolling_terminal))) {
1079 int fd = open("/dev/tty", O_RDWR, 0);
1080 pid_t me = getpid();
1081 EMACS_BLOCK_SIGNAL(SIGTTOU);
1082 EMACS_SET_TTY_PROCESS_GROUP(fd, &me);
1083 EMACS_UNBLOCK_SIGNAL(SIGTTOU);
1089 /* Split off the foreground process group to Emacs alone.
1090 When we are in the foreground, but not started in our own process
1091 group, redirect the TTY to point to our own process group. We need
1092 to be in our own process group to receive SIGIO properly. */
1093 static void munge_process_groups(void)
1095 #ifdef SIGIO_REQUIRES_SEPARATE_PROCESS_GROUP
1099 EMACS_SEPARATE_PROCESS_GROUP();
1101 munge_tty_process_group();
1105 void unmunge_tty_process_group(void)
1107 #ifdef SIGIO_REQUIRES_SEPARATE_PROCESS_GROUP
1109 int fd = open("/dev/tty", O_RDWR, 0);
1110 EMACS_BLOCK_SIGNAL(SIGTTOU);
1111 EMACS_SET_TTY_PROCESS_GROUP(fd, &inherited_tty_pgroup);
1112 EMACS_UNBLOCK_SIGNAL(SIGTTOU);
1118 /* Set the tty to our original foreground group.
1119 Also restore the original process group (put us back into sh's
1120 process group), so that ^Z will suspend both us and sh. */
1121 static void unmunge_process_groups(void)
1123 #ifdef SIGIO_REQUIRES_SEPARATE_PROCESS_GROUP
1127 unmunge_tty_process_group();
1129 EMACS_SET_PROCESS_GROUP(inherited_pgroup);
1133 /* According to some old wisdom, we need to be in a separate process
1134 group for SIGIO to work correctly (at least on some systems ...).
1135 So go ahead and put ourselves into our own process group. This
1136 will fail if we're already in our own process group, but who cares.
1137 Also record whether we were in our own process group. (In general,
1138 we will already be in our own process group if we were started from
1139 a job-control shell like csh, but not if we were started from sh).
1141 If we succeeded in changing our process group, then we will no
1142 longer be in the foreground process group of our controlling
1143 terminal. Therefore, if we have a console open onto this terminal,
1144 we have to change the controlling terminal's foreground process
1145 group (otherwise we will get stopped with a SIGTTIN signal when
1146 attempting to read from the terminal). It's important,
1147 however, that we do this *only* when we have a console open onto
1148 the terminal. It's a decidedly bad idea to do so otherwise,
1149 especially if XEmacs was started from the background. */
1151 void init_process_group(void)
1153 #ifdef SIGIO_REQUIRES_SEPARATE_PROCESS_GROUP
1154 if (!noninteractive) {
1155 int fd = open("/dev/tty", O_RDWR, 0);
1156 inherited_pgroup = EMACS_GET_PROCESS_GROUP();
1157 EMACS_GET_TTY_PROCESS_GROUP(fd, &inherited_tty_pgroup);
1159 EMACS_SEPARATE_PROCESS_GROUP();
1164 void disconnect_controlling_terminal(void)
1167 /* Controlling terminals are attached to a session.
1168 Create a new session for us; it will have no controlling
1169 terminal. This also, of course, puts us in our own
1173 /* Put us in our own process group. */
1174 EMACS_SEPARATE_PROCESS_GROUP();
1175 # if defined (TIOCNOTTY)
1176 /* This is the older way of disconnecting the controlling
1177 terminal, on 4.3 BSD. We must open /dev/tty; using
1178 filedesc 0 is not sufficient because it could be
1179 something else (e.g. our stdin was redirected to
1183 int j = open("/dev/tty", O_RDWR, 0);
1184 ioctl(j, TIOCNOTTY, 0);
1187 # endif /* TIOCNOTTY */
1189 On systems without TIOCNOTTY and without
1190 setsid(), we don't need to do anything more to
1191 disconnect our controlling terminal. Here is
1192 what the man page for termio(7) from a SYSV 3.2
1195 "The first terminal file opened by the process group leader
1196 of a terminal file not already associated with a process
1197 group becomes the control terminal for that process group.
1198 The control terminal plays a special role in handling quit
1199 and interrupt signals, as discussed below. The control
1200 terminal is inherited by a child process during a fork(2).
1201 A process can break this association by changing its process
1202 group using setpgrp(2)."
1205 # endif /* not HAVE_SETSID */
1208 /* ------------------------------------------------------ */
1209 /* Getting and setting emacs_tty structures */
1210 /* ------------------------------------------------------ */
1212 /* It's wrong to encase these into #ifdef HAVE_TTY because we need
1213 them for child TTY processes. */
1214 /* However, this does break NT support while we don't do child TTY processes */
1216 /* Set *TC to the parameters associated with the terminal FD.
1217 Return zero if all's well, or -1 if we ran into an error we
1218 couldn't deal with. */
1219 int emacs_get_tty(int fd, struct emacs_tty *settings)
1221 /* Retrieve the primary parameters - baud rate, character size, etcetera. */
1223 /* We have those nifty POSIX tcmumbleattr functions. */
1224 if (tcgetattr(fd, &settings->main) < 0)
1227 #elif defined HAVE_TERMIO
1228 /* The SYSV-style interface? */
1229 if (ioctl(fd, TCGETA, &settings->main) < 0)
1233 /* I give up - I hope you have the BSD ioctls. */
1234 if (ioctl(fd, TIOCGETP, &settings->main) < 0)
1236 #endif /* HAVE_TCATTR */
1238 /* Suivant - Do we have to get struct ltchars data? */
1240 if (ioctl(fd, TIOCGLTC, &settings->ltchars) < 0)
1244 /* How about a struct tchars and a wordful of lmode bits? */
1246 if (ioctl(fd, TIOCGETC, &settings->tchars) < 0
1247 || ioctl(fd, TIOCLGET, &settings->lmode) < 0)
1251 /* We have survived the tempest. */
1255 /* Set the parameters of the tty on FD according to the contents of
1256 *SETTINGS. If FLUSHP is non-zero, we discard input.
1257 Return 0 if all went well, and -1 if anything failed.
1258 #### All current callers use FLUSHP == 0. */
1260 int emacs_set_tty(int fd, struct emacs_tty *settings, int flushp)
1262 /* Set the primary parameters - baud rate, character size, etcetera. */
1265 /* We have those nifty POSIX tcmumbleattr functions.
1266 William J. Smith <wjs@wiis.wang.com> writes:
1267 "POSIX 1003.1 defines tcsetattr() to return success if it was
1268 able to perform any of the requested actions, even if some
1269 of the requested actions could not be performed.
1270 We must read settings back to ensure tty setup properly.
1271 AIX requires this to keep tty from hanging occasionally." */
1272 /* This makes sure that we don't loop indefinitely in here. */
1273 for (i = 0; i < 10; i++)
1275 (fd, flushp ? TCSAFLUSH : TCSADRAIN, &settings->main) < 0) {
1283 /* Get the current settings, and see if they're what we asked for. */
1284 tcgetattr(fd, &new);
1285 /* We cannot use memcmp on the whole structure here because under
1286 * aix386 the termios structure has some reserved field that may
1289 if (new.c_iflag == settings->main.c_iflag
1290 && new.c_oflag == settings->main.c_oflag
1291 && new.c_cflag == settings->main.c_cflag
1292 && new.c_lflag == settings->main.c_lflag
1293 && memcmp(new.c_cc, settings->main.c_cc, NCCS) == 0)
1298 #elif defined HAVE_TERMIO
1299 /* The SYSV-style interface? */
1300 if (ioctl(fd, flushp ? TCSETAF : TCSETAW, &settings->main) < 0)
1304 /* I give up - I hope you have the BSD ioctls. */
1305 if (ioctl(fd, (flushp) ? TIOCSETP : TIOCSETN, &settings->main) < 0)
1307 #endif /* HAVE_TCATTR */
1309 /* Suivant - Do we have to get struct ltchars data? */
1311 if (ioctl(fd, TIOCSLTC, &settings->ltchars) < 0)
1315 /* How about a struct tchars and a wordful of lmode bits? */
1317 if (ioctl(fd, TIOCSETC, &settings->tchars) < 0
1318 || ioctl(fd, TIOCLSET, &settings->lmode) < 0)
1322 /* We have survived the tempest. */
1327 /* ------------------------------------------------------ */
1328 /* Initializing a device */
1329 /* ------------------------------------------------------ */
1333 /* This may also be defined in stdio,
1334 but if so, this does no harm,
1335 and using the same name avoids wasting the other one's space. */
1337 #if ((defined(USG) || defined(DGUX)) && !defined(__STDC__))
1338 char _sobuf[BUFSIZ + 8];
1339 #elif (defined(USG) && !defined(LINUX) && !defined(_SCO_DS)) || defined(IRIX5)
1340 extern unsigned char _sobuf[BUFSIZ + 8];
1342 char _sobuf[BUFSIZ];
1345 #if defined (TIOCGLTC) && defined (HAVE_LTCHARS) /* HAVE_LTCHARS */
1346 static struct ltchars new_ltchars = { -1, -1, -1, -1, -1, -1 };
1348 #ifdef TIOCGETC /* HAVE_TCHARS */
1350 static struct tchars new_tchars = { -1, -1, -1, -1, -1, -1 };
1354 static void tty_init_sys_modes_on_device(struct device *d)
1356 struct emacs_tty tty;
1357 int input_fd, output_fd;
1358 struct console *con = XCONSOLE(DEVICE_CONSOLE(d));
1360 input_fd = CONSOLE_TTY_DATA(con)->infd;
1361 output_fd = CONSOLE_TTY_DATA(con)->outfd;
1363 emacs_get_tty(input_fd, &CONSOLE_TTY_DATA(con)->old_tty);
1364 tty = CONSOLE_TTY_DATA(con)->old_tty;
1366 con->tty_erase_char = Qnil;
1368 #if defined (HAVE_TERMIO) || defined (HAVE_TERMIOS)
1369 /* after all those years... */
1370 con->tty_erase_char = make_char(tty.main.c_cc[VERASE]);
1372 /* This allows meta to be sent on 8th bit. */
1373 tty.main.c_iflag &= ~INPCK; /* don't check input for parity */
1375 tty.main.c_iflag |= (IGNBRK); /* Ignore break condition */
1376 tty.main.c_iflag &= ~ICRNL; /* Disable map of CR to NL on input */
1378 tty.main.c_iflag &= ~ISTRIP; /* don't strip 8th bit on input */
1380 tty.main.c_lflag &= ~ECHO; /* Disable echo */
1381 tty.main.c_lflag &= ~ICANON; /* Disable erase/kill processing */
1383 tty.main.c_lflag &= ~IEXTEN; /* Disable other editing characters. */
1385 tty.main.c_lflag |= ISIG; /* Enable signals */
1386 if (TTY_FLAGS(con).flow_control) {
1387 tty.main.c_iflag |= IXON; /* Enable start/stop output control */
1389 tty.main.c_iflag &= ~IXANY;
1392 tty.main.c_iflag &= ~IXON; /* Disable start/stop output control */
1393 tty.main.c_oflag &= ~ONLCR; /* Disable map of NL to CR-NL
1395 tty.main.c_oflag &= ~TAB3; /* Disable tab expansion */
1397 if (TTY_FLAGS(con).meta_key) {
1398 tty.main.c_cflag |= CS8; /* allow 8th bit on input */
1399 tty.main.c_cflag &= ~PARENB; /* Don't check parity */
1402 if (CONSOLE_TTY_DATA(con)->controlling_terminal) {
1403 tty.main.c_cc[VINTR] = CONSOLE_QUIT_CHAR(con); /* C-g (usually) gives SIGINT */
1404 /* Set up C-g for both SIGQUIT and SIGINT.
1405 We don't know which we will get, but we handle both alike
1406 so which one it really gives us does not matter. */
1407 tty.main.c_cc[VQUIT] = CONSOLE_QUIT_CHAR(con);
1409 tty.main.c_cc[VINTR] = _POSIX_VDISABLE;
1410 tty.main.c_cc[VQUIT] = _POSIX_VDISABLE;
1412 tty.main.c_cc[VMIN] = 1; /* Input should wait for at
1414 tty.main.c_cc[VTIME] = 0; /* no matter how long that takes. */
1416 tty.main.c_cc[VSWTCH] = _POSIX_VDISABLE; /* Turn off shell layering use
1419 /* There was some conditionalizing here on (mips or TCATTR), but
1420 I think that's wrong. There was one report of C-y (DSUSP) not being
1421 disabled on HP9000s700 systems, and this might fix it. */
1423 tty.main.c_cc[VSUSP] = _POSIX_VDISABLE; /* Turn off mips handling of C-z. */
1426 tty.main.c_cc[V_DSUSP] = _POSIX_VDISABLE; /* Turn off mips handling of C-y. */
1427 #endif /* V_DSUSP */
1428 #ifdef VDSUSP /* Some systems have VDSUSP, some have V_DSUSP. */
1429 tty.main.c_cc[VDSUSP] = _POSIX_VDISABLE;
1432 tty.main.c_cc[VLNEXT] = _POSIX_VDISABLE;
1435 tty.main.c_cc[VREPRINT] = _POSIX_VDISABLE;
1436 #endif /* VREPRINT */
1438 tty.main.c_cc[VWERASE] = _POSIX_VDISABLE;
1439 #endif /* VWERASE */
1441 tty.main.c_cc[VDISCARD] = _POSIX_VDISABLE;
1442 #endif /* VDISCARD */
1444 tty.main.c_cc[VSTART] = _POSIX_VDISABLE;
1447 tty.main.c_cc[VSTRT] = _POSIX_VDISABLE; /* called VSTRT on some systems */
1450 tty.main.c_cc[VSTOP] = _POSIX_VDISABLE;
1452 #ifdef SET_LINE_DISCIPLINE
1453 /* Need to explicitly request TERMIODISC line discipline or
1454 Ultrix's termios does not work correctly. */
1455 tty.main.c_line = SET_LINE_DISCIPLINE;
1460 /* AIX enhanced edit loses NULs, so disable it. */
1461 tty.main.c_line = 0;
1462 tty.main.c_iflag &= ~ASCEDIT;
1464 tty.main.c_cc[VSTRT] = 255;
1465 tty.main.c_cc[VSTOP] = 255;
1466 tty.main.c_cc[VSUSP] = 255;
1467 tty.main.c_cc[VDSUSP] = 255;
1468 #endif /* IBMR2AIX */
1469 /* Also, PTY overloads NUL and BREAK.
1470 don't ignore break, but don't signal either, so it looks like NUL.
1471 This really serves a purpose only if running in an XTERM window
1472 or via TELNET or the like, but does no harm elsewhere. */
1473 tty.main.c_iflag &= ~IGNBRK;
1474 tty.main.c_iflag &= ~BRKINT;
1476 #else /* if not HAVE_TERMIO */
1477 con->tty_erase_char = make_char(tty.main.sg_erase);
1478 tty.main.sg_flags &= ~(ECHO | CRMOD | XTABS);
1479 if (TTY_FLAGS(con).meta_key)
1480 tty.main.sg_flags |= ANYP;
1481 /* #### should we be using RAW mode here? */
1482 tty.main.sg_flags |= /* interrupt_input ? RAW : */ CBREAK;
1483 #endif /* not HAVE_TERMIO */
1485 /* If going to use CBREAK mode, we must request C-g to interrupt
1486 and turn off start and stop chars, etc. If not going to use
1487 CBREAK mode, do this anyway so as to turn off local flow
1488 control for user coming over network on 4.2; in this case,
1489 only t_stopc and t_startc really matter. */
1492 /* Note: if not using CBREAK mode, it makes no difference how we
1494 tty.tchars = new_tchars;
1495 tty.tchars.t_intrc = CONSOLE_QUIT_CHAR(con);
1496 if (TTY_FLAGS(con).flow_control) {
1497 tty.tchars.t_startc = '\021';
1498 tty.tchars.t_stopc = '\023';
1501 tty.lmode = LDECCTQ | LLITOUT | LPASS8 | LNOFLSH |
1502 CONSOLE_TTY_DATA(con)->old_tty.lmode;
1504 #if defined (ultrix) || defined (__bsdi__)
1505 /* Under Ultrix 4.2a, leaving this out doesn't seem to hurt
1506 anything, and leaving it in breaks the meta key. Go figure. */
1507 /* Turning off ONLCR is enough under BSD/386. Leave the general
1508 output post-processing flag alone since for some reason it
1509 doesn't get reset after XEmacs goes away. */
1510 tty.lmode &= ~LLITOUT;
1513 #endif /* HAVE_TCHARS */
1514 #endif /* not HAVE_TERMIO */
1517 tty.ltchars = new_ltchars;
1518 #endif /* HAVE_LTCHARS */
1520 emacs_set_tty(input_fd, &tty, 0);
1522 /* This code added to insure that, if flow-control is not to be used,
1523 we have an unlocked terminal at the start. */
1526 if (!TTY_FLAGS(con).flow_control)
1527 ioctl(input_fd, TCXONC, 1);
1530 if (!TTY_FLAGS(con).flow_control)
1531 ioctl(input_fd, TIOCSTART, 0);
1534 #if defined (HAVE_TERMIOS) || defined (HPUX9)
1536 if (!TTY_FLAGS(con).flow_control)
1537 tcflow(input_fd, TCOON);
1544 /* IBM's HFT device usually thinks a ^J should be LF/CR.
1545 We need it to be only LF. This is the way that is
1549 if (ioctl(output_fd, HFTGETID, &tty) != -1)
1550 write(output_fd, "\033[20l", 5);
1555 #if 0 /* We do our own buffering with lstreams. */
1557 /* This symbol is defined on recent USG systems.
1558 Someone says without this call USG won't really buffer the file
1559 even with a call to setbuf. */
1560 setvbuf(CONSOLE_TTY_DATA(con)->outfd, (char *)_sobuf, _IOFBF,
1563 setbuf(CONSOLE_TTY_DATA(con)->outfd, (char *)_sobuf);
1569 #endif /* HAVE_TTY */
1571 void init_one_device(struct device *d)
1574 if (DEVICE_TTY_P(d))
1575 tty_init_sys_modes_on_device(d);
1577 #if defined(SIGIO) && !defined(BROKEN_SIGIO)
1578 if (!DEVICE_STREAM_P(d)) {
1579 init_sigio_on_device(d);
1580 request_sigio_on_device(d);
1585 void init_one_console(struct console *con)
1587 Lisp_Object devcons;
1589 CONSOLE_DEVICE_LOOP(devcons, con) {
1590 struct device *d = XDEVICE(XCAR(devcons));
1596 void reinit_initial_console(void)
1598 munge_process_groups();
1599 if (CONSOLEP(Vcontrolling_terminal) &&
1600 CONSOLE_LIVE_P(XCONSOLE(Vcontrolling_terminal)))
1601 init_one_console(XCONSOLE(Vcontrolling_terminal));
1604 /* ------------------------------------------------------ */
1605 /* Other TTY functions */
1606 /* ------------------------------------------------------ */
1610 #if 0 /* not currently used */
1612 /* Return nonzero if safe to use tabs in output.
1613 At the time this is called, init_sys_modes has not been done yet. */
1615 int tabs_safe_p(struct device *d)
1618 if (DEVICE_TTY_P(d)) {
1619 struct emacs_tty tty;
1621 emacs_get_tty(DEVICE_INFD(d), &tty);
1622 return EMACS_TTY_TABS_OK(&tty);
1630 /* Get terminal size from system.
1631 Store number of lines into *heightp and width into *widthp.
1632 If zero or a negative number is stored, the value is not valid. */
1634 void get_tty_device_size(struct device *d, int *widthp, int *heightp)
1636 int input_fd = DEVICE_INFD(d);
1638 assert(DEVICE_TTY_P(d));
1643 struct winsize size;
1645 if (ioctl(input_fd, TIOCGWINSZ, &size) == -1)
1646 *widthp = *heightp = 0;
1648 *widthp = size.ws_col;
1649 *heightp = size.ws_row;
1652 #elif defined TIOCGSIZE
1654 /* SunOS - style. */
1655 struct ttysize size;
1657 if (ioctl(input_fd, TIOCGSIZE, &size) == -1)
1658 *widthp = *heightp = 0;
1660 *widthp = size.ts_cols;
1661 *heightp = size.ts_lines;
1664 #else /* system doesn't know size */
1669 #endif /* not !TIOCGWINSZ */
1672 #endif /* HAVE_TTY */
1674 /* ------------------------------------------------------ */
1675 /* Is device 8 bit ? */
1676 /* ------------------------------------------------------ */
1680 int eight_bit_tty(struct device *d)
1686 assert(DEVICE_TTY_P(d));
1687 input_fd = DEVICE_INFD(d);
1689 emacs_get_tty(input_fd, &s);
1691 #if defined (HAVE_TERMIO) || defined (HAVE_TERMIOS)
1692 eight_bit = (s.main.c_cflag & CSIZE) == CS8;
1694 eight_bit = 0; /* I don't know how to do it */
1699 #endif /* HAVE_TTY */
1701 /* ------------------------------------------------------ */
1702 /* Resetting a device */
1703 /* ------------------------------------------------------ */
1707 /* Prepare the terminal for exiting Emacs; move the cursor to the
1708 bottom of the frame, turn off interrupt-driven I/O, etc. */
1709 static void tty_reset_sys_modes_on_device(struct device *d)
1711 int input_fd, output_fd;
1712 struct console *con = XCONSOLE(DEVICE_CONSOLE(d));
1714 input_fd = CONSOLE_TTY_DATA(con)->infd;
1715 output_fd = CONSOLE_TTY_DATA(con)->outfd;
1717 #if defined (IBMR2AIX) && defined (AIXHFT)
1719 /* HFT consoles normally use ^J as a LF/CR. We forced it to
1720 do the LF only. Now, we need to reset it. */
1723 if (ioctl(output_fd, HFTGETID, &tty) != -1)
1724 write(output_fd, "\033[20h", 5);
1728 tty_redisplay_shutdown(con);
1729 /* reset_tty_modes() flushes the connection at its end. */
1730 reset_tty_modes(con);
1733 /* Avoid possible loss of output when changing terminal modes. */
1737 while (emacs_set_tty(input_fd, &CONSOLE_TTY_DATA(con)->old_tty, 0)
1738 < 0 && errno == EINTR) ;
1740 #ifdef SET_LINE_DISCIPLINE
1741 /* Ultrix's termios *ignores* any line discipline except TERMIODISC.
1742 A different old line discipline is therefore not restored, yet.
1743 Restore the old line discipline by hand. */
1744 ioctl(input_fd, TIOCSETD, &old_tty.main.c_line);
1753 #endif /* HAVE_TTY */
1755 void reset_one_device(struct device *d)
1758 if (DEVICE_TTY_P(d))
1759 tty_reset_sys_modes_on_device(d);
1762 if (DEVICE_STREAM_P(d))
1763 fflush(CONSOLE_STREAM_DATA(XCONSOLE(DEVICE_CONSOLE(d)))->out);
1764 #if defined(SIGIO) && !defined(BROKEN_SIGIO)
1765 if (!DEVICE_STREAM_P(d)) {
1766 unrequest_sigio_on_device(d);
1767 reset_sigio_on_device(d);
1772 void reset_one_console(struct console *con)
1774 /* Note: this can be called during GC. */
1775 Lisp_Object devcons;
1777 CONSOLE_DEVICE_LOOP(devcons, con) {
1778 struct device *d = XDEVICE(XCAR(devcons));
1780 reset_one_device(d);
1784 void reset_all_consoles(void)
1786 /* Note: this can be called during GC. */
1787 Lisp_Object concons;
1789 CONSOLE_LOOP(concons) {
1790 struct console *con = XCONSOLE(XCAR(concons));
1792 reset_one_console(con);
1795 unmunge_process_groups();
1798 void reset_initial_console(void)
1800 if (CONSOLEP(Vcontrolling_terminal) &&
1801 CONSOLE_LIVE_P(XCONSOLE(Vcontrolling_terminal)))
1802 reset_one_console(XCONSOLE(Vcontrolling_terminal));
1803 unmunge_process_groups();
1806 /* ------------------------------------------------------ */
1807 /* extra TTY stuff under AIX */
1808 /* ------------------------------------------------------ */
1812 /* Called from init_sys_modes. */
1813 static void hft_init(struct console *con)
1818 assert(CONSOLE_TTY_P(con));
1819 input_fd = CONSOLE_TTY_DATA(con)->infd;
1821 /* If we're not on an HFT we shouldn't do any of this. We determine
1822 if we are on an HFT by trying to get an HFT error code. If this
1823 call fails, we're not on an HFT. */
1825 if (ioctl(input_fd, HFQERROR, &junk) < 0)
1827 #else /* not IBMR2AIX */
1828 if (ioctl(input_fd, HFQEIO, 0) < 0)
1830 #endif /* not IBMR2AIX */
1832 /* On AIX the default hft keyboard mapping uses backspace rather than delete
1833 as the rubout key's ASCII code. Here this is changed. The bug is that
1834 there's no way to determine the old mapping, so in reset_one_console
1835 we need to assume that the normal map had been present. Of course, this
1836 code also doesn't help if on a terminal emulator which doesn't understand
1840 struct hfkeymap keymap;
1842 buf.hf_bufp = (char *)&keymap;
1843 buf.hf_buflen = sizeof(keymap);
1844 keymap.hf_nkeys = 2;
1845 keymap.hfkey[0].hf_kpos = 15;
1846 keymap.hfkey[0].hf_kstate = HFMAPCHAR | HFSHFNONE;
1848 keymap.hfkey[0].hf_keyidh = '<';
1849 #else /* not IBMR2AIX */
1850 keymap.hfkey[0].hf_page = '<';
1851 #endif /* not IBMR2AIX */
1852 keymap.hfkey[0].hf_char = 127;
1853 keymap.hfkey[1].hf_kpos = 15;
1854 keymap.hfkey[1].hf_kstate = HFMAPCHAR | HFSHFSHFT;
1856 keymap.hfkey[1].hf_keyidh = '<';
1857 #else /* not IBMR2AIX */
1858 keymap.hfkey[1].hf_page = '<';
1859 #endif /* not IBMR2AIX */
1860 keymap.hfkey[1].hf_char = 127;
1861 hftctl(input_fd, HFSKBD, &buf);
1863 /* #### Should probably set a console TTY flag here. */
1865 /* The HFT system on AIX doesn't optimize for scrolling, so it's really ugly
1867 line_ins_del_ok = char_ins_del_ok = 0;
1871 /* Reset the rubout key to backspace. */
1873 static void hft_reset(struct console *con)
1876 struct hfkeymap keymap;
1880 assert(CONSOLE_TTY_P(con));
1881 input_fd = CONSOLE_TTY_DATA(con)->infd;
1884 if (ioctl(input_fd, HFQERROR, &junk) < 0)
1886 #else /* not IBMR2AIX */
1887 if (ioctl(input_fd, HFQEIO, 0) < 0)
1889 #endif /* not IBMR2AIX */
1891 buf.hf_bufp = (char *)&keymap;
1892 buf.hf_buflen = sizeof(keymap);
1893 keymap.hf_nkeys = 2;
1894 keymap.hfkey[0].hf_kpos = 15;
1895 keymap.hfkey[0].hf_kstate = HFMAPCHAR | HFSHFNONE;
1897 keymap.hfkey[0].hf_keyidh = '<';
1898 #else /* not IBMR2AIX */
1899 keymap.hfkey[0].hf_page = '<';
1900 #endif /* not IBMR2AIX */
1901 keymap.hfkey[0].hf_char = 8;
1902 keymap.hfkey[1].hf_kpos = 15;
1903 keymap.hfkey[1].hf_kstate = HFMAPCHAR | HFSHFSHFT;
1905 keymap.hfkey[1].hf_keyidh = '<';
1906 #else /* not IBMR2AIX */
1907 keymap.hfkey[1].hf_page = '<';
1908 #endif /* not IBMR2AIX */
1909 keymap.hfkey[1].hf_char = 8;
1910 hftctl(input_fd, HFSKBD, &buf);
1915 /************************************************************************/
1916 /* limits of text/data segments */
1917 /************************************************************************/
1919 #if !defined(CANNOT_DUMP) && !defined(PDUMP)
1923 #ifndef SYSTEM_MALLOC
1930 /* Some systems that cannot dump also cannot implement these. */
1933 * Return the address of the start of the text segment prior to
1934 * doing an unexec. After unexec the return value is undefined.
1935 * See crt0.c for further explanation and _start.
1939 #if !defined(HAVE_TEXT_START) && !defined(PDUMP)
1941 EXTERN_C int _start(void);
1943 char *start_of_text(void)
1946 return (char *)TEXT_START;
1948 return (char *)_start;
1949 #endif /* TEXT_START */
1951 #endif /* !defined(HAVE_TEXT_START) && !defined(PDUMP) */
1954 * Return the address of the start of the data segment prior to
1955 * doing an unexec. After unexec the return value is undefined.
1956 * See ecrt0.c for further information and definition of data_start.
1958 * Apparently, on BSD systems this is etext at startup. On
1959 * USG systems (swapping) this is highly mmu dependent and
1960 * is also dependent on whether or not the program is running
1961 * with shared text. Generally there is a (possibly large)
1962 * gap between end of text and start of data with shared text.
1964 * On Uniplus+ systems with shared text, data starts at a
1965 * fixed address. Each port (from a given oem) is generally
1966 * different, and the specific value of the start of data can
1967 * be obtained via the UniPlus+ specific "uvar" system call,
1968 * however the method outlined in crt0.c seems to be more portable.
1970 * Probably what will have to happen when a USG unexec is available,
1971 * at least on UniPlus, is temacs will have to be made unshared so
1972 * that text and data are contiguous. Then once loadup is complete,
1973 * unexec will produce a shared executable where the data can be
1974 * at the normal shared text boundary and the startofdata variable
1975 * will be patched by unexec to the correct value.
1979 #if defined(ORDINARY_LINK)
1980 extern char **environ;
1983 void *start_of_data(void)
1986 return ((char *)DATA_START);
1988 #if defined (ORDINARY_LINK) || defined(PDUMP)
1990 * This is a hack. Since we're not linking crt0.c or pre_crt0.c,
1991 * data_start isn't defined. We take the address of environ, which
1992 * is known to live at or near the start of the system crt0.c, and
1993 * we don't sweat the handful of bytes that might lose.
1995 #if defined (HEAP_IN_DATA) && !defined(PDUMP)
1996 extern char *static_heap_base;
1998 return static_heap_base;
2000 return ((char *)&environ);
2002 extern int data_start;
2003 return ((char *)&data_start);
2004 #endif /* ORDINARY_LINK */
2005 #endif /* DATA_START */
2007 #endif /* NEED_STARTS (not CANNOT_DUMP or not SYSTEM_MALLOC) */
2009 #if !defined(CANNOT_DUMP) && !defined(PDUMP)
2010 /* Some systems that cannot dump also cannot implement these. */
2013 * Return the address of the end of the text segment prior to
2014 * doing an unexec. After unexec the return value is undefined.
2017 char *end_of_text(void)
2020 return ((char *)TEXT_END);
2023 return ((char *)&etext);
2028 * Return the address of the end of the data segment prior to
2029 * doing an unexec. After unexec the return value is undefined.
2032 char *end_of_data(void)
2035 return ((char *)DATA_END);
2038 return ((char *)&edata);
2042 #endif /* !defined(CANNOT_DUMP) && !defined(PDUMP) */
2044 /************************************************************************/
2045 /* get the system name */
2046 /************************************************************************/
2048 /* init_system_name sets up the string for the Lisp function
2049 system-name to return. */
2051 extern Lisp_Object Vsystem_name;
2053 void init_system_name(void)
2055 #if !defined (HAVE_GETHOSTNAME)
2058 Vsystem_name = build_string(uts.nodename);
2059 #else /* HAVE_GETHOSTNAME */
2060 unsigned int hostname_size = 256;
2061 char *hostname = (char *)alloca(hostname_size);
2063 /* Try to get the host name; if the buffer is too short, try
2064 again. Apparently, the only indication gethostname gives of
2065 whether the buffer was large enough is the presence or absence
2066 of a '\0' in the string. Eech. */
2068 gethostname(hostname, hostname_size - 1);
2069 hostname[hostname_size - 1] = '\0';
2071 /* Was the buffer large enough for the '\0'? */
2072 if (strlen(hostname) < (size_t) (hostname_size - 1))
2075 hostname_size <<= 1;
2076 hostname = (char *)alloca(hostname_size);
2078 # if defined( HAVE_SOCKETS)
2079 /* Turn the hostname into the official, fully-qualified hostname.
2080 Don't do this if we're going to dump; this can confuse system
2081 libraries on some machines and make the dumped emacs core dump. */
2082 # ifndef CANNOT_DUMP
2084 # endif /* not CANNOT_DUMP */
2085 if (!strchr(hostname, '.')) {
2086 # if !(defined(HAVE_GETADDRINFO) && defined(HAVE_GETNAMEINFO))
2087 struct hostent *hp = NULL;
2090 for (count = 0; count < 10; count++) {
2093 /* Some systems can't handle SIGALARM/SIGIO in gethostbyname(). */
2095 hp = gethostbyname(hostname);
2098 if (!(hp == 0 && h_errno == TRY_AGAIN))
2100 Fsleep_for(make_int(1));
2104 const char *fqdn = (const char *)hp->h_name;
2106 if (!strchr(fqdn, '.')) {
2107 /* We still don't have a fully qualified domain name.
2108 Try to find one in the list of alternate names */
2109 char **alias = hp->h_aliases;
2110 while (*alias && !strchr(*alias, '.'))
2115 hostname = (char *)alloca(strlen(fqdn) + 1);
2116 strcpy(hostname, fqdn);
2118 # else /* !(HAVE_GETADDRINFO && HAVE_GETNAMEINFO) */
2119 struct addrinfo hints, *res;
2122 hints.ai_flags = AI_CANONNAME;
2123 #ifdef IPV6_CANONICALIZE
2124 hints.ai_family = AF_UNSPEC;
2126 hints.ai_family = PF_INET;
2128 hints.ai_socktype = SOCK_STREAM;
2129 hints.ai_protocol = 0;
2130 if (!getaddrinfo(hostname, NULL, &hints, &res)) {
2132 (char *)alloca(strlen(res->ai_canonname) +
2134 strcpy(hostname, res->ai_canonname);
2138 # endif /* !(HAVE_GETADDRINFO && HAVE_GETNAMEINFO) */
2140 # endif /* HAVE_SOCKETS */
2141 Vsystem_name = build_string(hostname);
2142 #endif /* HAVE_GETHOSTNAME */
2147 for (i = 0, p = XSTRING_DATA(Vsystem_name);
2148 i < XSTRING_LENGTH(Vsystem_name); i++, p++) {
2149 if (*p == ' ' || *p == '\t')
2155 /************************************************************************/
2156 /* Emulation of select() */
2157 /************************************************************************/
2161 ERROR:XEmacs requires a working select().
2162 #endif /* not HAVE_SELECT */
2163 \f/************************************************************************/
2164 /* Emulation of signal stuff */
2165 /************************************************************************/
2166 /* BSD 4.1 crap deleted. 4.2 was released in 1983, for God's sake! I
2167 can't imagine that anyone is actually running that OS any more.
2168 You can't use X under it (I think) because there's no select().
2169 Anyway, the signal stuff has all been changed. If someone wants to
2170 get this stuff working again, look in the FSF Emacs sources. */
2171 /* POSIX signals support - DJB */
2172 #ifdef HAVE_SIGPROCMASK
2173 /* #### Is there any reason this is static global rather than local? */
2174 static struct sigaction new_action, old_action;
2176 signal_handler_t sys_do_signal(int signal_number, signal_handler_t action)
2180 /* XEmacs works better if system calls are *not* restarted.
2181 This allows C-g to interrupt reads and writes, on most systems.
2183 #### Another possibility is to just longjmp() out of the signal
2184 handler. According to W.R. Stevens, this should be OK on all
2185 systems. However, I don't want to deal with the potential
2186 evil ramifications of this at this point. */
2189 /* This gets us restartable system calls for efficiency.
2190 The "else" code will work as well. */
2191 return (berk_signal(signal_number, action));
2193 sigemptyset(&new_action.sa_mask);
2194 new_action.sa_handler = action;
2195 #if defined (SA_RESTART)
2196 /* Emacs mostly works better with restartable system services. If this
2197 * flag exists, we probably want to turn it on here.
2199 new_action.sa_flags = SA_RESTART;
2201 new_action.sa_flags = 0;
2203 sigaction(signal_number, &new_action, &old_action);
2204 return (old_action.sa_handler);
2209 sigemptyset(&new_action.sa_mask);
2210 new_action.sa_handler = action;
2211 #if defined (SA_INTERRUPT) /* don't restart system calls, under SunOS */
2212 new_action.sa_flags = SA_INTERRUPT;
2214 new_action.sa_flags = 0;
2216 sigaction(signal_number, &new_action, &old_action);
2217 return (signal_handler_t) (old_action.sa_handler);
2222 #elif defined (HAVE_SIGBLOCK)
2223 /* We use sigvec() rather than signal() if we have it, because
2224 it lets us specify interruptible system calls. */
2225 signal_handler_t sys_do_signal(int signal_number, signal_handler_t action)
2227 struct sigvec vec, ovec;
2229 vec.sv_handler = action;
2231 #ifdef SV_INTERRUPT /* don't restart system calls */
2232 vec.sv_flags = SV_INTERRUPT;
2237 sigvec(signal_number, &vec, &ovec);
2239 return (ovec.sv_handler);
2242 #endif /* HAVE_SIGBLOCK (HAVE_SIGPROCMASK) */
2244 /************************************************************************/
2245 /* Emulation of strerror() and errno support */
2246 /************************************************************************/
2248 #ifndef HAVE_STRERROR
2250 #if !defined(NeXT) && !defined(__alpha) && !defined(MACH) && !defined(LINUX) && !defined(IRIX) && !defined(__NetBSD__)
2251 /* Linux added here by Raymond L. Toy <toy@alydar.crd.ge.com> for XEmacs. */
2252 /* Irix added here by gparker@sni-usa.com for XEmacs. */
2253 /* NetBSD added here by James R Grinter <jrg@doc.ic.ac.uk> for XEmacs */
2254 extern const char *sys_errlist[];
2255 extern int sys_nerr;
2259 extern char *sys_errlist[];
2260 extern int sys_nerr;
2263 const char *strerror(int errnum)
2265 if (errnum >= 0 && errnum < sys_nerr)
2266 return sys_errlist[errnum];
2267 return ((const char *)GETTEXT("Unknown error"));
2270 #endif /* ! HAVE_STRERROR */
2272 /************************************************************************/
2273 /* Encapsulations of system calls */
2274 /************************************************************************/
2276 #define PATHNAME_CONVERT_OUT(path, pathout) \
2277 TO_EXTERNAL_FORMAT(C_STRING, (path), \
2278 C_STRING_ALLOCA, (pathout), \
2281 /***************** low-level calls ****************/
2284 * On USG systems the system calls are INTERRUPTIBLE by signals
2285 * that the user program has elected to catch. Thus the system call
2286 * must be retried in these cases. To handle this without massive
2287 * changes in the source code, we remap the standard system call names
2288 * to names for our own functions in sysdep.c that do the system call
2289 * with retries. Actually, for portability reasons, it is good
2290 * programming practice, as this example shows, to limit all actual
2291 * system calls to a single occurrence in the source. Sure, this
2292 * adds an extra level of function call overhead but it is almost
2293 * always negligible. Fred Fish, Unisoft Systems Inc.
2296 /* Ben sez: read Dick Gabriel's essay about the Worse Is Better
2297 approach to programming and its connection to the silly
2298 interruptible-system-call business. To find it, look on
2299 Jamie's home page (http://www.jwz.org/worse-is-better.html). */
2301 #ifdef ENCAPSULATE_OPEN
2302 int sys_open(const char *path, int oflag, ...)
2308 va_start(ap, oflag);
2309 mode = va_arg(ap, int);
2312 PATHNAME_CONVERT_OUT(path, pout);
2314 #ifdef INTERRUPTIBLE_OPEN
2317 while ((rtnval = open(pout, oflag, mode)) == -1
2318 && (errno == EINTR))
2323 return open(pout, oflag, mode);
2326 #endif /* ENCAPSULATE_OPEN */
2328 /* Like sys_open, only when open() is interrupted by EINTR, check for
2329 QUIT. This allows the callers of this function to be interrupted
2330 with C-g when, say, reading from named pipes. However, this should
2331 be used with caution, as it can GC.
2333 This function will not function as expected on systems where open()
2334 is not interrupted by C-g. However, the worst that can happen is
2335 the fallback to simple open(). */
2336 int interruptible_open(const char *path, int oflag, int mode)
2338 /* This function can GC */
2341 PATHNAME_CONVERT_OUT(path, nrout);
2344 int rtnval = open(nrout, oflag, mode);
2345 if (!(rtnval == -1 && errno == EINTR))
2347 /* open() was interrupted. Was QUIT responsible? */
2352 #ifdef ENCAPSULATE_CLOSE
2353 int sys_close(int filedes)
2355 #ifdef INTERRUPTIBLE_CLOSE
2357 REGISTER int rtnval;
2359 while ((rtnval = close(filedes)) == -1 && (errno == EINTR))
2362 /* If close is interrupted SunOS 4.1 may or may not have closed the
2363 file descriptor. If it did the second close will fail with
2364 errno = EBADF. That means we have succeeded. */
2365 if (rtnval == -1 && did_retry && errno == EBADF)
2370 return close(filedes);
2373 #endif /* ENCAPSULATE_CLOSE */
2375 ssize_t sys_read_1(int fildes, void *buf, size_t nbyte, int allow_quit)
2379 /* No harm in looping regardless of the INTERRUPTIBLE_IO setting. */
2380 while ((rtnval = read(fildes, buf, nbyte)) == -1 && (errno == EINTR)) {
2387 #ifdef ENCAPSULATE_READ
2388 ssize_t sys_read(int fildes, void *buf, size_t nbyte)
2390 return sys_read_1(fildes, buf, nbyte, 0);
2392 #endif /* ENCAPSULATE_READ */
2394 ssize_t sys_write_1(int fildes, const void *buf, size_t nbyte, int allow_quit)
2396 ssize_t bytes_written = 0;
2397 const char *b = (const char *)buf;
2399 /* No harm in looping regardless of the INTERRUPTIBLE_IO setting. */
2401 ssize_t rtnval = write(fildes, b, nbyte);
2410 return bytes_written ? bytes_written : -1;
2414 bytes_written += rtnval;
2416 return bytes_written;
2419 #ifdef ENCAPSULATE_WRITE
2420 ssize_t sys_write(int fildes, const void *buf, size_t nbyte)
2422 return sys_write_1(fildes, buf, nbyte, 0);
2424 #endif /* ENCAPSULATE_WRITE */
2426 /**************** stdio calls ****************/
2428 /* There is at least some evidence that the stdio calls are interruptible
2429 just like the normal system calls, at least on some systems. In any
2430 case, it doesn't hurt to encapsulate them. */
2432 /* #### Should also encapsulate fflush().
2433 #### Should conceivably encapsulate getchar() etc. What a pain! */
2435 #ifdef ENCAPSULATE_FOPEN
2436 FILE *sys_fopen(const char *path, const char *type)
2440 PATHNAME_CONVERT_OUT(path, pout);
2441 #if defined (INTERRUPTIBLE_OPEN)
2444 while (!(rtnval = fopen(pout, type)) && (errno == EINTR))
2449 return fopen(pout, type);
2452 #endif /* ENCAPSULATE_FOPEN */
2454 #ifdef ENCAPSULATE_FCLOSE
2455 int sys_fclose(FILE * stream)
2457 #ifdef INTERRUPTIBLE_CLOSE
2460 while ((rtnval = fclose(stream)) == EOF && (errno == EINTR)) ;
2463 return fclose(stream);
2466 #endif /* ENCAPSULATE_FCLOSE */
2468 #ifdef ENCAPSULATE_FREAD
2469 size_t sys_fread(void *ptr, size_t size, size_t nitem, FILE * stream)
2471 #ifdef INTERRUPTIBLE_IO
2473 size_t items_read = 0;
2474 char *b = (char *)ptr;
2477 rtnval = fread(b, size, nitem, stream);
2479 if (ferror(stream) && errno == EINTR)
2486 items_read += rtnval;
2488 return (items_read);
2490 return fread(ptr, size, nitem, stream);
2493 #endif /* ENCAPSULATE_FREAD */
2495 #ifdef ENCAPSULATE_FWRITE
2496 size_t sys_fwrite(const void *ptr, size_t size, size_t nitem, FILE * stream)
2498 #ifdef INTERRUPTIBLE_IO
2500 size_t items_written = 0;
2501 const char *b = (const char *)ptr;
2504 rtnval = fwrite(b, size, nitem, stream);
2506 if (ferror(stream) && errno == EINTR)
2509 return items_written;
2513 items_written += rtnval;
2515 return (items_written);
2517 return fwrite(ptr, size, nitem, stream);
2520 #endif /* ENCAPSULATE_FWRITE */
2522 /********************* directory calls *******************/
2524 #ifdef ENCAPSULATE_CHDIR
2525 int sys_chdir(const char *path)
2528 PATHNAME_CONVERT_OUT(path, pout);
2531 #endif /* ENCAPSULATE_CHDIR */
2533 #ifdef ENCAPSULATE_MKDIR
2534 int sys_mkdir(const char *path, mode_t mode)
2537 PATHNAME_CONVERT_OUT(path, pout);
2538 return mkdir(pout, mode);
2540 #endif /* ENCAPSULATE_MKDIR */
2542 #ifdef ENCAPSULATE_OPENDIR
2543 DIR *sys_opendir(const char *filename)
2547 PATHNAME_CONVERT_OUT(filename, fout);
2549 while (!(rtnval = opendir(fout))
2550 && (errno == EINTR)) ;
2553 #endif /* ENCAPSULATE_OPENDIR */
2555 #ifdef ENCAPSULATE_READDIR
2556 DIRENTRY *sys_readdir(DIR * dirp)
2560 /* Apparently setting errno is necessary on some systems?
2561 Maybe readdir() doesn't always set errno ?! */
2562 while (!(errno = 0, rtnval = readdir(dirp))
2563 && (errno == EINTR)) ;
2567 if (rtnval == NULL) /* End of directory */
2570 const Extbyte *const external_name =
2571 (const Extbyte *)rtnval->d_name;
2572 Extcount external_len = strlen(rtnval->d_name);
2573 const Bufbyte *internal_name;
2574 Bytecount internal_len;
2576 TO_INTERNAL_FORMAT(DATA, (external_name, external_len),
2577 ALLOCA, (internal_name, internal_len),
2580 /* check for common case of ASCII filename */
2581 if (internal_len == external_len &&
2582 !memcmp(external_name, internal_name, internal_len))
2585 { /* Non-ASCII filename */
2586 static Bufbyte_dynarr *internal_DIRENTRY;
2587 if (!internal_DIRENTRY)
2588 internal_DIRENTRY = Dynarr_new(Bufbyte);
2590 Dynarr_reset(internal_DIRENTRY);
2592 Dynarr_add_many(internal_DIRENTRY, (Bufbyte *) rtnval,
2593 offsetof(DIRENTRY, d_name));
2595 Dynarr_add_many(internal_DIRENTRY, internal_name,
2597 Dynarr_add(internal_DIRENTRY, '\0'); /* NUL-terminate */
2598 return (DIRENTRY *) Dynarr_atp(internal_DIRENTRY, 0);
2603 #endif /* ENCAPSULATE_READDIR */
2605 #ifdef ENCAPSULATE_CLOSEDIR
2606 int sys_closedir(DIR * dirp)
2610 while ((rtnval = closedir(dirp)) == -1 && (errno == EINTR)) ;
2613 #endif /* ENCAPSULATE_CLOSEDIR */
2615 #ifdef ENCAPSULATE_RMDIR
2616 int sys_rmdir(const char *path)
2619 PATHNAME_CONVERT_OUT(path, pout);
2622 #endif /* ENCAPSULATE_RMDIR */
2624 /***************** file-information calls ******************/
2626 #ifdef ENCAPSULATE_ACCESS
2627 int sys_access(const char *path, int mode)
2630 PATHNAME_CONVERT_OUT(path, pout);
2631 return access(pout, mode);
2633 #endif /* ENCAPSULATE_ACCESS */
2636 #ifdef ENCAPSULATE_EACCESS
2637 int sys_eaccess(const char *path, int mode)
2640 PATHNAME_CONVERT_OUT(path, pout);
2641 return eaccess(pout, mode);
2643 #endif /* ENCAPSULATE_EACCESS */
2644 #endif /* HAVE_EACCESS */
2646 #ifdef ENCAPSULATE_LSTAT
2647 int sys_lstat(const char *path, struct stat *buf)
2650 PATHNAME_CONVERT_OUT(path, pout);
2651 return lstat(pout, buf);
2653 #endif /* ENCAPSULATE_LSTAT */
2655 #ifdef ENCAPSULATE_READLINK
2656 int sys_readlink(const char *path, char *buf, size_t bufsiz)
2659 PATHNAME_CONVERT_OUT(path, pout);
2660 /* #### currently we don't do conversions on the incoming data */
2661 return readlink(pout, buf, bufsiz);
2663 #endif /* ENCAPSULATE_READLINK */
2665 #ifdef ENCAPSULATE_FSTAT
2666 int sys_fstat(int fd, struct stat *buf)
2668 return fstat(fd, buf);
2670 #endif /* ENCAPSULATE_FSTAT */
2672 int sxemacs_stat(const char *path, struct stat *buf)
2675 PATHNAME_CONVERT_OUT(path, pout);
2676 return stat(pout, buf);
2679 /****************** file-manipulation calls *****************/
2681 #ifdef ENCAPSULATE_CHMOD
2682 int sys_chmod(const char *path, mode_t mode)
2685 PATHNAME_CONVERT_OUT(path, pout);
2686 return chmod(pout, mode);
2688 #endif /* ENCAPSULATE_CHMOD */
2690 #ifdef ENCAPSULATE_CREAT
2691 int sys_creat(const char *path, mode_t mode)
2694 PATHNAME_CONVERT_OUT(path, pout);
2695 return creat(pout, mode);
2697 #endif /* ENCAPSULATE_CREAT */
2699 #ifdef ENCAPSULATE_LINK
2700 int sys_link(const char *existing, const char *new)
2703 PATHNAME_CONVERT_OUT(existing, eout);
2704 PATHNAME_CONVERT_OUT(new, nout);
2705 return link(eout, nout);
2707 #endif /* ENCAPSULATE_LINK */
2709 #ifdef ENCAPSULATE_RENAME
2710 int sys_rename(const char *old, const char *new)
2713 PATHNAME_CONVERT_OUT(old, oout);
2714 PATHNAME_CONVERT_OUT(new, nout);
2715 return rename(oout, nout);
2717 #endif /* ENCAPSULATE_RENAME */
2719 #ifdef ENCAPSULATE_SYMLINK
2720 int sys_symlink(const char *name1, const char *name2)
2722 char *n1out, *n2out;
2723 PATHNAME_CONVERT_OUT(name1, n1out);
2724 PATHNAME_CONVERT_OUT(name2, n2out);
2725 return symlink(n1out, n2out);
2727 #endif /* ENCAPSULATE_SYMLINK */
2729 #ifdef ENCAPSULATE_UNLINK
2730 int sys_unlink(const char *path)
2733 PATHNAME_CONVERT_OUT(path, pout);
2734 return unlink(pout);
2736 #endif /* ENCAPSULATE_UNLINK */
2738 #ifdef ENCAPSULATE_EXECVP
2739 int sys_execvp(const char *path, char *const *argv)
2744 PATHNAME_CONVERT_OUT(path, pout);
2745 for (argc = 0; argv[argc]; argc++);
2748 char *new_argv[argc+1];
2749 for (i = 0; i < argc; i++) {
2750 PATHNAME_CONVERT_OUT(argv[i], new_argv[i]);
2752 new_argv[argc] = NULL;
2753 return execvp(pout, new_argv);
2756 #endif /* ENCAPSULATE_EXECVP */
2758 /************************************************************************/
2759 /* Emulations of missing system calls */
2760 /************************************************************************/
2762 /***** (these are primarily required for USG, it seems) *****/
2765 char *getcwd(char *pathname, size_t size)
2767 return getwd(pathname);
2769 #endif /* emulate getcwd */
2773 * Emulate rename using unlink/link. Note that this is
2774 * only partially correct. Also, doesn't enforce restriction
2775 * that files be of same type (regular->regular, dir->dir, etc).
2779 int rename(const char *from, const char *to)
2781 if (access(from, 0) == 0) {
2783 if (link(from, to) == 0)
2784 if (unlink(from) == 0)
2789 #endif /* HAVE_RENAME */
2794 /* HPUX curses library references perror, but as far as we know
2795 it won't be called. Anyway this definition will do for now. */
2801 #endif /* not HAVE_PERROR */
2807 * Emulate BSD dup2. First close newd if it already exists.
2808 * Then, attempt to dup oldd. If not successful, call dup2 recursively
2809 * until we are, then close the unsuccessful ones.
2812 int dup2(int oldd, int newd)
2819 fd = fcntl(oldd, F_DUPFD, newd);
2821 error("can't dup2 (%i,%i) : %s", oldd, newd, strerror(errno));
2828 ret = dup2(old, new);
2831 #endif /* F_DUPFD */
2834 #endif /* not HAVE_DUP2 */
2837 * Gettimeofday. Simulate as much as possible. Only accurate
2838 * to nearest second. Emacs doesn't use tzp so ignore it for now.
2841 #if !defined (HAVE_GETTIMEOFDAY)
2843 int gettimeofday(struct timeval *tp, struct timezone *tzp)
2847 tp->tv_sec = time((long *)0);
2850 tzp->tz_minuteswest = -1;
2854 #endif /* !HAVE_GETTIMEOFDAY */
2856 /* No need to encapsulate utime and utimes explicitly because all
2857 access to those functions goes through the following. */
2859 int set_file_times(Lisp_Object path, EMACS_TIME atime, EMACS_TIME mtime)
2861 #if defined (HAVE_UTIME)
2864 utb.actime = EMACS_SECS(atime);
2865 utb.modtime = EMACS_SECS(mtime);
2866 LISP_STRING_TO_EXTERNAL(path, filename, Qfile_name);
2867 return utime(filename, &utb);
2868 #elif defined (HAVE_UTIMES)
2869 struct timeval tv[2];
2873 LISP_STRING_TO_EXTERNAL(path, filename, Qfile_name);
2874 return utimes(filename, tv);
2876 /* No file times setting function available. */
2883 static long ticks_per_second;
2884 static long orig_user_ticks, orig_system_ticks;
2885 EMACS_TIME orig_real_time;
2887 static int process_times_available;
2889 /* Return the relative user and system tick count. We try to
2890 maintain calculations in terms of integers as long as possible
2891 for increased accuracy. */
2893 static int get_process_times_1(long *user_ticks, long *system_ticks)
2895 #if defined (_SC_CLK_TCK) || defined (CLK_TCK)
2896 /* We have the POSIX times() function available. */
2899 *user_ticks = (long)tttt.tms_utime;
2900 *system_ticks = (long)tttt.tms_stime;
2902 #elif defined (CLOCKS_PER_SEC)
2903 *user_ticks = (long)clock();
2911 void init_process_times_very_early(void)
2913 #if defined (_SC_CLK_TCK)
2914 ticks_per_second = sysconf(_SC_CLK_TCK);
2915 #elif defined (CLK_TCK)
2916 ticks_per_second = CLK_TCK;
2917 #elif defined (CLOCKS_PER_SEC)
2918 ticks_per_second = CLOCKS_PER_SEC;
2921 process_times_available = get_process_times_1(&orig_user_ticks,
2922 &orig_system_ticks);
2923 EMACS_GET_TIME(orig_real_time);
2926 /* Return the user and system times used up by this process so far. */
2928 get_process_times(double *user_time, double *system_time, double *real_time)
2930 EMACS_TIME curr_real_time;
2931 EMACS_TIME elapsed_time;
2932 long curr_user_ticks, curr_system_ticks;
2934 EMACS_GET_TIME(curr_real_time);
2935 EMACS_SUB_TIME(elapsed_time, curr_real_time, orig_real_time);
2936 *real_time = (EMACS_SECS(elapsed_time)
2937 + ((double)EMACS_USECS(elapsed_time)) / 1000000);
2938 if (get_process_times_1(&curr_user_ticks, &curr_system_ticks)) {
2939 *user_time = (((double)(curr_user_ticks - orig_user_ticks))
2940 / ticks_per_second);
2942 (((double)(curr_system_ticks - orig_system_ticks))
2943 / ticks_per_second);
2946 *user_time = *real_time;
2957 /* Figure out how many bits the system's random number generator uses.
2958 `random' and `lrand48' are assumed to return 31 usable bits.
2959 BSD `rand' returns a 31 bit value but the low order bits are unusable;
2960 so we'll shift it and treat it like the 15-bit USG `rand'. */
2964 # define RAND_BITS 31
2965 # else /* !HAVE_RANDOM */
2966 # ifdef HAVE_LRAND48
2967 # define RAND_BITS 31
2968 # define random lrand48
2969 # else /* !HAVE_LRAND48 */
2970 # define RAND_BITS 15
2971 # if RAND_MAX == 32767
2972 # define random rand
2973 # else /* RAND_MAX != 32767 */
2974 # if RAND_MAX == 2147483647
2975 # define random() (rand () >> 16)
2976 # else /* RAND_MAX != 2147483647 */
2978 # define random rand
2980 # define random() (rand () >> 16)
2982 # endif /* RAND_MAX != 2147483647 */
2983 # endif /* RAND_MAX != 32767 */
2984 # endif /* !HAVE_LRAND48 */
2985 # endif /* !HAVE_RANDOM */
2986 #endif /* !RAND_BITS */
2988 void seed_random(long arg);
2989 void seed_random(long arg)
2992 srandom((unsigned int)arg);
2994 # ifdef HAVE_LRAND48
2997 srand((unsigned int)arg);
3000 #if defined HAVE_MPZ && (defined WITH_GMP || defined WITH_MP)
3001 bigz_random_seed((unsigned long)arg);
3006 * Build a full Emacs-sized word out of whatever we've got.
3007 * This suffices even for a 64-bit architecture with a 15-bit rand.
3009 long get_random(void);
3010 long get_random(void)
3012 long val = random();
3013 #if INT_VALBITS > RAND_BITS
3014 val = (val << RAND_BITS) ^ random();
3015 #if INT_VALBITS > 2*RAND_BITS
3016 val = (val << RAND_BITS) ^ random();
3017 #if INT_VALBITS > 3*RAND_BITS
3018 val = (val << RAND_BITS) ^ random();
3019 #if INT_VALBITS > 4*RAND_BITS
3020 val = (val << RAND_BITS) ^ random();
3021 #endif /* need at least 5 */
3022 #endif /* need at least 4 */
3023 #endif /* need at least 3 */
3024 #endif /* need at least 2 */
3025 return val & (EMACS_INT) ((1UL << INT_VALBITS) - 1);
3028 /************************************************************************/
3029 /* Strings corresponding to defined signals */
3030 /************************************************************************/
3032 #if !defined (SYS_SIGLIST_DECLARED) && !defined (HAVE_SYS_SIGLIST) && !defined(HAVE_DECL_SYS_SIGLIST)
3036 #define SXE_SYS_SIGLIST_DECLARED 1
3037 const char *sys_siglist[NSIG + 1] = {
3038 /* AIX has changed the signals a bit */
3039 DEFER_GETTEXT("bogus signal"), /* 0 */
3040 DEFER_GETTEXT("hangup"), /* 1 SIGHUP */
3041 DEFER_GETTEXT("interrupt"), /* 2 SIGINT */
3042 DEFER_GETTEXT("quit"), /* 3 SIGQUIT */
3043 DEFER_GETTEXT("illegal instruction"), /* 4 SIGILL */
3044 DEFER_GETTEXT("trace trap"), /* 5 SIGTRAP */
3045 DEFER_GETTEXT("IOT instruction"), /* 6 SIGIOT */
3046 DEFER_GETTEXT("crash likely"), /* 7 SIGDANGER */
3047 DEFER_GETTEXT("floating point exception"), /* 8 SIGFPE */
3048 DEFER_GETTEXT("kill"), /* 9 SIGKILL */
3049 DEFER_GETTEXT("bus error"), /* 10 SIGBUS */
3050 DEFER_GETTEXT("segmentation violation"), /* 11 SIGSEGV */
3051 DEFER_GETTEXT("bad argument to system call"), /* 12 SIGSYS */
3052 DEFER_GETTEXT("write on a pipe with no one to read it"), /* 13 SIGPIPE */
3053 DEFER_GETTEXT("alarm clock"), /* 14 SIGALRM */
3054 DEFER_GETTEXT("software termination signal"), /* 15 SIGTERM */
3055 DEFER_GETTEXT("user defined signal 1"), /* 16 SIGUSR1 */
3056 DEFER_GETTEXT("user defined signal 2"), /* 17 SIGUSR2 */
3057 DEFER_GETTEXT("death of a child"), /* 18 SIGCLD */
3058 DEFER_GETTEXT("power-fail restart"), /* 19 SIGPWR */
3059 DEFER_GETTEXT("bogus signal"), /* 20 */
3060 DEFER_GETTEXT("bogus signal"), /* 21 */
3061 DEFER_GETTEXT("bogus signal"), /* 22 */
3062 DEFER_GETTEXT("bogus signal"), /* 23 */
3063 DEFER_GETTEXT("bogus signal"), /* 24 */
3064 DEFER_GETTEXT("LAN I/O interrupt"), /* 25 SIGAIO */
3065 DEFER_GETTEXT("PTY I/O interrupt"), /* 26 SIGPTY */
3066 DEFER_GETTEXT("I/O intervention required"), /* 27 SIGIOINT */
3068 DEFER_GETTEXT("HFT grant"), /* 28 SIGGRANT */
3069 DEFER_GETTEXT("HFT retract"), /* 29 SIGRETRACT */
3070 DEFER_GETTEXT("HFT sound done"), /* 30 SIGSOUND */
3071 DEFER_GETTEXT("HFT input ready"), /* 31 SIGMSG */
3075 #else /* USG, not AIX */
3076 #define SXE_SYS_SIGLIST_DECLARED 1
3077 const char *sys_siglist[NSIG + 1] = {
3078 DEFER_GETTEXT("bogus signal"), /* 0 */
3079 DEFER_GETTEXT("hangup"), /* 1 SIGHUP */
3080 DEFER_GETTEXT("interrupt"), /* 2 SIGINT */
3081 DEFER_GETTEXT("quit"), /* 3 SIGQUIT */
3082 DEFER_GETTEXT("illegal instruction"), /* 4 SIGILL */
3083 DEFER_GETTEXT("trace trap"), /* 5 SIGTRAP */
3084 DEFER_GETTEXT("IOT instruction"), /* 6 SIGIOT */
3085 DEFER_GETTEXT("EMT instruction"), /* 7 SIGEMT */
3086 DEFER_GETTEXT("floating point exception"), /* 8 SIGFPE */
3087 DEFER_GETTEXT("kill"), /* 9 SIGKILL */
3088 DEFER_GETTEXT("bus error"), /* 10 SIGBUS */
3089 DEFER_GETTEXT("segmentation violation"), /* 11 SIGSEGV */
3090 DEFER_GETTEXT("bad argument to system call"), /* 12 SIGSYS */
3091 DEFER_GETTEXT("write on a pipe with no one to read it"), /* 13 SIGPIPE */
3092 DEFER_GETTEXT("alarm clock"), /* 14 SIGALRM */
3093 DEFER_GETTEXT("software termination signal"), /* 15 SIGTERM */
3094 DEFER_GETTEXT("user defined signal 1"), /* 16 SIGUSR1 */
3095 DEFER_GETTEXT("user defined signal 2"), /* 17 SIGUSR2 */
3096 DEFER_GETTEXT("death of a child"), /* 18 SIGCLD */
3097 DEFER_GETTEXT("power-fail restart"), /* 19 SIGPWR */
3099 DEFER_GETTEXT("window size changed"), /* 20 SIGWINCH */
3100 DEFER_GETTEXT("urgent socket condition"), /* 21 SIGURG */
3101 DEFER_GETTEXT("pollable event occurred"), /* 22 SIGPOLL */
3102 DEFER_GETTEXT("stop (cannot be caught or ignored)"), /* 23 SIGSTOP */
3103 DEFER_GETTEXT("user stop requested from tty"), /* 24 SIGTSTP */
3104 DEFER_GETTEXT("stopped process has been continued"), /* 25 SIGCONT */
3105 DEFER_GETTEXT("background tty read attempted"), /* 26 SIGTTIN */
3106 DEFER_GETTEXT("background tty write attempted"), /* 27 SIGTTOU */
3107 DEFER_GETTEXT("virtual timer expired"), /* 28 SIGVTALRM */
3108 DEFER_GETTEXT("profiling timer expired"), /* 29 SIGPROF */
3109 DEFER_GETTEXT("exceeded cpu limit"), /* 30 SIGXCPU */
3110 DEFER_GETTEXT("exceeded file size limit"), /* 31 SIGXFSZ */
3111 DEFER_GETTEXT("process's lwps are blocked"), /* 32 SIGWAITING */
3112 DEFER_GETTEXT("special signal used by thread library"), /* 33 SIGLWP */
3114 DEFER_GETTEXT("special signal used by CPR"), /* 34 SIGFREEZE */
3117 DEFER_GETTEXT("special signal used by CPR"), /* 35 SIGTHAW */
3122 #endif /* not AIX */
3125 #define SXE_SYS_SIGLIST_DECLARED 1
3126 const char *sys_siglist[NSIG + 1] = {
3127 DEFER_GETTEXT("null signal"), /* 0 SIGNULL */
3128 DEFER_GETTEXT("hangup"), /* 1 SIGHUP */
3129 DEFER_GETTEXT("interrupt"), /* 2 SIGINT */
3130 DEFER_GETTEXT("quit"), /* 3 SIGQUIT */
3131 DEFER_GETTEXT("illegal instruction"), /* 4 SIGILL */
3132 DEFER_GETTEXT("trace trap"), /* 5 SIGTRAP */
3133 DEFER_GETTEXT("abort termination"), /* 6 SIGABRT */
3134 DEFER_GETTEXT("SIGEMT"), /* 7 SIGEMT */
3135 DEFER_GETTEXT("floating point exception"), /* 8 SIGFPE */
3136 DEFER_GETTEXT("kill"), /* 9 SIGKILL */
3137 DEFER_GETTEXT("bus error"), /* 10 SIGBUS */
3138 DEFER_GETTEXT("segmentation violation"), /* 11 SIGSEGV */
3139 DEFER_GETTEXT("bad argument to system call"), /* 12 SIGSYS */
3140 DEFER_GETTEXT("write on a pipe with no reader"), /* 13 SIGPIPE */
3141 DEFER_GETTEXT("alarm clock"), /* 14 SIGALRM */
3142 DEFER_GETTEXT("software termination signal"), /* 15 SIGTERM */
3143 DEFER_GETTEXT("user defined signal 1"), /* 16 SIGUSR1 */
3144 DEFER_GETTEXT("user defined signal 2"), /* 17 SIGUSR2 */
3145 DEFER_GETTEXT("child stopped or terminated"), /* 18 SIGCLD */
3146 DEFER_GETTEXT("power-fail restart"), /* 19 SIGPWR */
3147 DEFER_GETTEXT("window size changed"), /* 20 SIGWINCH */
3148 DEFER_GETTEXT("undefined"), /* 21 */
3149 DEFER_GETTEXT("pollable event occurred"), /* 22 SIGPOLL */
3150 DEFER_GETTEXT("sendable stop signal not from tty"), /* 23 SIGSTOP */
3151 DEFER_GETTEXT("stop signal from tty"), /* 24 SIGSTP */
3152 DEFER_GETTEXT("continue a stopped process"), /* 25 SIGCONT */
3153 DEFER_GETTEXT("attempted background tty read"), /* 26 SIGTTIN */
3154 DEFER_GETTEXT("attempted background tty write"), /* 27 SIGTTOU */
3155 DEFER_GETTEXT("undefined"), /* 28 */
3156 DEFER_GETTEXT("undefined"), /* 29 */
3157 DEFER_GETTEXT("undefined"), /* 30 */
3158 DEFER_GETTEXT("undefined"), /* 31 */
3159 DEFER_GETTEXT("undefined"), /* 32 */
3160 DEFER_GETTEXT("socket (TCP/IP) urgent data arrival"), /* 33 SIGURG */
3161 DEFER_GETTEXT("I/O is possible"), /* 34 SIGIO */
3162 DEFER_GETTEXT("exceeded cpu time limit"), /* 35 SIGXCPU */
3163 DEFER_GETTEXT("exceeded file size limit"), /* 36 SIGXFSZ */
3164 DEFER_GETTEXT("virtual time alarm"), /* 37 SIGVTALRM */
3165 DEFER_GETTEXT("profiling time alarm"), /* 38 SIGPROF */
3166 DEFER_GETTEXT("undefined"), /* 39 */
3167 DEFER_GETTEXT("file record locks revoked"), /* 40 SIGLOST */
3168 DEFER_GETTEXT("undefined"), /* 41 */
3169 DEFER_GETTEXT("undefined"), /* 42 */
3170 DEFER_GETTEXT("undefined"), /* 43 */
3171 DEFER_GETTEXT("undefined"), /* 44 */
3172 DEFER_GETTEXT("undefined"), /* 45 */
3173 DEFER_GETTEXT("undefined"), /* 46 */
3174 DEFER_GETTEXT("undefined"), /* 47 */
3175 DEFER_GETTEXT("undefined"), /* 48 */
3176 DEFER_GETTEXT("undefined"), /* 49 */
3177 DEFER_GETTEXT("undefined"), /* 50 */
3178 DEFER_GETTEXT("undefined"), /* 51 */
3179 DEFER_GETTEXT("undefined"), /* 52 */
3180 DEFER_GETTEXT("undefined"), /* 53 */
3181 DEFER_GETTEXT("undefined"), /* 54 */
3182 DEFER_GETTEXT("undefined"), /* 55 */
3183 DEFER_GETTEXT("undefined"), /* 56 */
3184 DEFER_GETTEXT("undefined"), /* 57 */
3185 DEFER_GETTEXT("undefined"), /* 58 */
3186 DEFER_GETTEXT("undefined"), /* 59 */
3187 DEFER_GETTEXT("undefined"), /* 60 */
3188 DEFER_GETTEXT("undefined"), /* 61 */
3189 DEFER_GETTEXT("undefined"), /* 62 */
3190 DEFER_GETTEXT("undefined"), /* 63 */
3191 DEFER_GETTEXT("notification message in mess. queue"), /* 64 SIGDGNOTIFY */
3196 #endif /* ! SYS_SIGLIST_DECLARED && ! HAVE_SYS_SIGLIST */
3198 /************************************************************************/
3199 /* Directory routines for systems that don't have them */
3200 /************************************************************************/
3202 #ifdef SYSV_SYSTEM_DIR
3206 #if defined(BROKEN_CLOSEDIR) || !defined(HAVE_CLOSEDIR)
3207 int closedir(DIR * dirp)
3208 { /* stream from opendir */
3211 rtnval = sys_close(dirp->dd_fd);
3213 /* Some systems (like Solaris) allocate the buffer and the DIR all
3214 in one block. Why in the world are we freeing this ourselves
3216 #if ! (defined (sun) && defined (USG5_4))
3217 xfree((char *)dirp->dd_buf); /* directory block defined in <dirent.h> */
3219 xfree((char *)dirp);
3222 #endif /* BROKEN_CLOSEDIR or not HAVE_CLOSEDIR */
3223 #endif /* SYSV_SYSTEM_DIR */
3225 #ifdef NONSYSTEM_DIR_LIBRARY
3227 DIR *opendir(const char *filename)
3228 { /* name of directory */
3229 DIR *dirp; /* -> malloc'ed storage */
3230 int fd; /* file descriptor for read */
3231 struct stat sbuf; /* result of fstat */
3233 fd = sys_open(filename, O_RDONLY);
3237 if (fstat(fd, &sbuf) < 0
3238 || (sbuf.st_mode & S_IFMT) != S_IFDIR
3239 || (dirp = xnew(DIR)) == 0) {
3241 return 0; /* bad luck today */
3245 dirp->dd_loc = dirp->dd_size = 0; /* refill needed */
3250 void closedir(DIR * dirp)
3251 { /* stream from opendir */
3252 sys_close(dirp->dd_fd);
3258 ino_t od_ino; /* inode */
3259 char od_name[DIRSIZ]; /* filename */
3262 static struct direct dir_static; /* simulated directory contents */
3265 struct direct *readdir(DIR * dirp)
3266 { /* stream from opendir */
3267 struct olddir *dp; /* -> directory data */
3270 if (dirp->dd_loc >= dirp->dd_size)
3271 dirp->dd_loc = dirp->dd_size = 0;
3273 if (dirp->dd_size == 0 /* refill buffer */
3275 sys_read(dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ)) <= 0)
3278 dp = (struct olddir *)&dirp->dd_buf[dirp->dd_loc];
3279 dirp->dd_loc += sizeof(struct olddir);
3281 if (dp->od_ino != 0) { /* not deleted entry */
3282 dir_static.d_ino = dp->od_ino;
3283 strncpy(dir_static.d_name, dp->od_name, DIRSIZ);
3284 dir_static.d_name[DIRSIZ] = '\0';
3285 dir_static.d_namlen = strlen(dir_static.d_name);
3286 dir_static.d_reclen = sizeof(struct direct)
3288 + dir_static.d_namlen - dir_static.d_namlen % 4;
3289 return &dir_static; /* -> simulated structure */
3294 #endif /* NONSYSTEM_DIR_LIBRARY */
3296 /* mkdir and rmdir functions, for systems which don't have them. */
3300 * Written by Robert Rother, Mariah Corporation, August 1985.
3302 * If you want it, it's yours. All I ask in return is that if you
3303 * figure out how to do this in a Bourne Shell script you send me
3305 * sdcsvax!rmr or rmr@uscd
3307 * Severely hacked over by John Gilmore to make a 4.2BSD compatible
3308 * subroutine. 11Mar86; hoptoad!gnu
3310 * Modified by rmtodd@uokmax 6-28-87 -- when making an already existing dir,
3311 * subroutine didn't return EEXIST. It does now.
3317 #ifdef MKDIR_PROTOTYPE
3320 int mkdir(const char *dpath, int dmode)
3323 int cpid, status, fd;
3324 struct stat statbuf;
3326 if (stat(dpath, &statbuf) == 0) { /* we do want stat() here */
3327 errno = EEXIST; /* Stat worked, so it already exists */
3331 /* If stat fails for a reason other than non-existence, return error */
3332 if (errno != ENOENT)
3335 synch_process_alive = 1;
3336 switch (cpid = fork()) {
3338 case -1: /* Error in fork() */
3339 return -1; /* Errno is set already */
3341 case 0: /* Child process */
3344 * Cheap hack to set mode of new directory. Since this
3345 * child process is going away anyway, we zap its umask.
3346 * ####, this won't suffice to set SUID, SGID, etc. on this
3347 * directory. Does anybody care?
3349 status = umask(0); /* Get current umask */
3350 status = umask(status | (0777 & ~dmode)); /* Set for mkdir */
3351 fd = sys_open("/dev/null", O_RDWR);
3353 if (fd != STDIN_FILENO)
3354 dup2(fd, STDIN_FILENO);
3355 if (fd != STDOUT_FILENO)
3356 dup2(fd, STDOUT_FILENO);
3357 if (fd != STDERR_FILENO)
3358 dup2(fd, STDERR_FILENO);
3360 execl("/bin/mkdir", "mkdir", dpath, (char *)0);
3361 _exit(-1); /* Can't exec /bin/mkdir */
3364 default: /* Parent process */
3365 wait_for_termination(cpid);
3368 if (synch_process_death != 0 || synch_process_retcode != 0) {
3369 errno = EIO; /* We don't know why, but */
3370 return -1; /* /bin/mkdir failed */
3375 #endif /* not HAVE_MKDIR */
3378 int rmdir(const char *dpath)
3380 int cpid, status, fd;
3381 struct stat statbuf;
3383 if (stat(dpath, &statbuf) != 0) { /* we do want stat() here */
3384 /* Stat just set errno. We don't have to */
3388 synch_process_alive = 1;
3389 switch (cpid = fork()) {
3391 case -1: /* Error in fork() */
3392 return (-1); /* Errno is set already */
3394 case 0: /* Child process */
3395 fd = sys_open("/dev/null", O_RDWR);
3397 if (fd != STDIN_FILENO)
3398 dup2(fd, STDIN_FILENO);
3399 if (fd != STDOUT_FILENO)
3400 dup2(fd, STDOUT_FILENO);
3401 if (fd != STDERR_FILENO)
3402 dup2(fd, STDERR_FILENO);
3404 execl("/bin/rmdir", "rmdir", dpath, (char *)0);
3405 _exit(-1); /* Can't exec /bin/mkdir */
3407 default: /* Parent process */
3408 wait_for_termination(cpid);
3411 if (synch_process_death != 0 || synch_process_retcode != 0) {
3412 errno = EIO; /* We don't know why, but */
3413 return -1; /* /bin/rmdir failed */
3418 #endif /* !HAVE_RMDIR */
3420 /************************************************************************/
3421 /* Misc. SunOS crap */
3422 /************************************************************************/
3426 /* These are included on Sunos 4.1 when we do not use shared libraries.
3427 X11 libraries may refer to these functions but (we hope) do not
3428 actually call them. */
3445 #endif /* USE_DL_STUBS */
3448 /* big dirname magic */
3450 #if !defined(HAVE_DIRNAME)
3451 /* some coreutils borrows here */
3453 x__dirname(restrict char *res, const char *file, size_t len);
3455 /* assumes res is malloc'd of size LEN (and >= xstrlen(file)) */
3456 size_t file_len = xstrlen(file);
3457 size_t offs = x__dirlen(file, file_len);
3458 int append_dot = (offs == 0);
3460 xmemcpy(dir, file, offs);
3466 #endif /* !HAVE_DIRNAME */
3468 /* sysdep.c ends here */