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57 lines
1.6 KiB
C
57 lines
1.6 KiB
C
/* pause -- suspend the process until a signal arrives. POSIX.1 version.
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Copyright (C) 2003-2017 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, see
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<http://www.gnu.org/licenses/>. */
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#include <signal.h>
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#include <unistd.h>
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#include <sysdep-cancel.h>
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/* Suspend the process until a signal arrives.
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This always returns -1 and sets errno to EINTR. */
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int
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__libc_pause (void)
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{
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sigset_t set;
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__sigemptyset (&set);
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__sigprocmask (SIG_BLOCK, NULL, &set);
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/* pause is a cancellation point, but so is sigsuspend.
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So no need for anything special here. */
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return __sigsuspend (&set);
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}
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weak_alias (__libc_pause, pause)
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LIBC_CANCEL_HANDLED (); /* sigsuspend handles our cancellation. */
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#ifndef NO_CANCELLATION
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# include <not-cancel.h>
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int
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__pause_nocancel (void)
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{
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sigset_t set;
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__sigemptyset (&set);
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__sigprocmask (SIG_BLOCK, NULL, &set);
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return sigsuspend_not_cancel (&set);
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}
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#endif
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