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52 lines
1.4 KiB
C
52 lines
1.4 KiB
C
/* Copyright (C) 1991-2020 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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<https://www.gnu.org/licenses/>. */
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#include <errno.h>
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#include <signal.h>
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#include <stddef.h>
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#include <unistd.h>
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/* Change the set of blocked signals to SET,
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wait until a signal arrives, and restore the set of blocked signals. */
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int
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__sigsuspend (const sigset_t *set)
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{
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sigset_t oset;
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int save;
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if (set == NULL)
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{
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__set_errno (EINVAL);
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return -1;
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}
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if (sigprocmask (SIG_SETMASK, set, &oset) < 0)
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return -1;
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(void) pause();
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save = errno;
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if (sigprocmask (SIG_SETMASK, &oset, (sigset_t *) NULL) < 0)
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return -1;
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__set_errno (save);
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return -1;
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}
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libc_hidden_def (__sigsuspend)
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weak_alias (__sigsuspend, sigsuspend)
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