772e3426a7
2003-01-28 Ulrich Drepper <drepper@redhat.com> * sysdeps/unix/common/pause.c (do_pause): New function. Split from __libc_pause. Implement using sigsuspend. (__libc_pause): Call do_pause to do the real work. * sysdeps/posix/sigpause.c (do_sigpause): Check range of sig_or_mask parameter is is_sig != 0.
88 lines
2.5 KiB
C
88 lines
2.5 KiB
C
/* Copyright (C) 1991,92,94-98,2000,2002,2003 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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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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#include <sysdep-cancel.h>
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#include <sigset-cvt-mask.h>
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/* Set the mask of blocked signals to MASK,
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wait for a signal to arrive, and then restore the mask. */
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static int
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do_sigpause (int sig_or_mask, int is_sig)
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{
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sigset_t set;
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if (is_sig != 0)
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{
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/* The modern X/Open implementation is requested. */
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if (__sigprocmask (0, NULL, &set) < 0
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/* Perform the tests from sigdelset ourselves. */
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|| sig_or_mask <= 0 || sig_or_mask >= NSIG
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|| __sigdelset (&set, sig_or_mask) < 0)
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return -1;
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}
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else if (sigset_set_old_mask (&set, sig_or_mask) < 0)
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return -1;
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return __sigsuspend (&set);
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}
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int
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__sigpause (int sig_or_mask, int is_sig)
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{
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if (SINGLE_THREAD_P)
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return do_sigpause (sig_or_mask, is_sig);
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int oldtype = LIBC_CANCEL_ASYNC ();
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int result = do_sigpause (sig_or_mask, is_sig);
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LIBC_CANCEL_RESET (oldtype);
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return result;
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}
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libc_hidden_def (__sigpause)
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/* We have to provide a default version of this function since the
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standards demand it. The version which is a bit more reasonable is
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the BSD version. So make this the default. */
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int
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__attribute__ ((weak))
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__default_sigpause (int mask)
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{
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return __sigpause (mask, 0);
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}
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#undef sigpause
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weak_alias (__default_sigpause, sigpause)
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strong_alias (__default_sigpause, __libc_sigpause)
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/* We have to provide a default version of this function since the
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standards demand it. The version which is a bit more reasonable is
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the BSD version. So make this the default. */
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int
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__attribute__ ((weak))
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__xpg_sigpause (int sig)
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{
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return __sigpause (sig, 1);
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}
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strong_alias (__xpg_sigpause, __libc___xpg_sigpause)
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