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56 lines
1.5 KiB
C
56 lines
1.5 KiB
C
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/* Copyright (C) 1991, 1994, 1995 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 Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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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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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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Cambridge, MA 02139, USA. */
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#include <ansidecl.h>
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#include <errno.h>
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#include <signal.h>
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/* Block signals in MASK, returning the old mask. */
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int
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DEFUN(__sigblock, (mask), int mask)
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{
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register int sig;
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sigset_t set, oset;
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if (__sigemptyset(&set) < 0)
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return -1;
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if (sizeof (mask) == sizeof (set))
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*(int *) &set = mask;
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else
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for (sig = 1; sig < NSIG; ++sig)
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if ((mask & sigmask(sig)) &&
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__sigaddset(&set, sig) < 0)
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return -1;
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if (sigprocmask(SIG_BLOCK, &set, &oset) < 0)
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return -1;
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mask = 0;
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if (sizeof (mask) == sizeof (oset))
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mask = *(int *) &oset;
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else
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for (sig = 1; sig < NSIG; ++sig)
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if (__sigismember(&oset, sig))
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mask |= sigmask(sig);
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return mask;
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}
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weak_alias (__sigblock, sigblock)
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