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34 lines
1.1 KiB
C
34 lines
1.1 KiB
C
/* Add SIG to the calling process' signal mask.
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Copyright (C) 1998-2020 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>, 1998.
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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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#define __need_NULL
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#include <stddef.h>
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#include <signal.h>
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int
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sighold (int sig)
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{
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sigset_t set;
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sigemptyset (&set);
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if (sigaddset (&set, sig) < 0)
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return -1;
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return __sigprocmask (SIG_BLOCK, &set, NULL);
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}
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