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bf2cc5fb02
* sysdeps/posix/writev.c: Likewise. From Momchil Velikov <velco@fadata.bg>. * elf/dl-error.c [! _LIBC_REENTRANT]: Use a static variable instead of calling *GL(dl_error_catch_tsd) for a thread-local location. * elf/rtld.c (startup_error_tsd): Conditionalize on [_LIBC_REENTRANT]. (dl_main): Same for GL(dl_error_catch_tsd) initialization. * elf/dl-tsd.c: Conditionalize contents on [_LIBC_REENTRANT]. * libio/iofflush.c: Add libc_hidden_def. * libio/iofwrite.c: Likewise. * sysdeps/generic/sigtimedwait.c: Likewise. * sysdeps/generic/sigwaitinfo.c: Likewise. * sysdeps/posix/sigwait.c: Likewise. Reported by Momchil Velikov <velco@fadata.bg>. * inet/inet_lnaof.c (inet_lnaof): Change return type to in_addr_t to match <arpa/inet.h> declaration. * inet/inet_netof.c (inet_netof): Likewise. * inet/inet_mkadr.c (inet_makeaddr): Likewise for argument types. Reported by Momchil Velikov <velco@fadata.bg>.
93 lines
2.7 KiB
C
93 lines
2.7 KiB
C
/* Implementation of sigwait function from POSIX.1c.
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Copyright (C) 1996, 1997, 1999, 2000 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#include <errno.h>
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#include <signal.h>
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#include <stddef.h> /* For NULL. */
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/* This is our dummy signal handler we use here. */
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static void ignore_signal (int sig);
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/* Place where to remember which signal we got. Please note that this
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implementation cannot be used for the threaded libc. The
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libpthread must provide an own version. */
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static int was_sig;
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int
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__sigwait (const sigset_t *set, int *sig)
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{
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sigset_t tmp_mask;
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struct sigaction saved[NSIG];
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struct sigaction action;
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int save_errno;
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int this;
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/* Prepare set. */
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__sigfillset (&tmp_mask);
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/* Unblock all signals in the SET and register our nice handler. */
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action.sa_handler = ignore_signal;
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action.sa_flags = 0;
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__sigfillset (&action.sa_mask); /* Block all signals for handler. */
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/* Make sure we recognize error conditions by setting WAS_SIG to a
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value which does not describe a legal signal number. */
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was_sig = -1;
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for (this = 1; this < NSIG; ++this)
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if (__sigismember (set, this))
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{
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/* Unblock this signal. */
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__sigdelset (&tmp_mask, this);
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/* Register temporary action handler. */
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if (__sigaction (this, &action, &saved[this]) != 0)
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goto restore_handler;
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}
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/* Now we can wait for signals. */
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__sigsuspend (&tmp_mask);
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restore_handler:
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save_errno = errno;
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while (--this >= 1)
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if (__sigismember (set, this))
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/* We ignore errors here since we must restore all handlers. */
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__sigaction (this, &saved[this], NULL);
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__set_errno (save_errno);
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/* Store the result and return. */
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*sig = was_sig;
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return was_sig == -1 ? -1 : 0;
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}
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libc_hidden_def (__sigwait)
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weak_alias (__sigwait, sigwait)
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static void
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ignore_signal (int sig)
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{
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/* Remember the signal. */
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was_sig = sig;
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}
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