66 lines
1.6 KiB
C
66 lines
1.6 KiB
C
/* Copyright (C) 1991, 1992, 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 <stddef.h>
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#include <signal.h>
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/* If SET is not NULL, modify the current set of blocked signals
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according to HOW, which may be SIG_BLOCK, SIG_UNBLOCK or SIG_SETMASK.
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If OSET is not NULL, store the old set of blocked signals in *OSET. */
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int
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DEFUN(__sigprocmask, (how, set, oset),
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int how AND CONST sigset_t *set AND sigset_t *oset)
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{
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int mask;
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if (set != NULL)
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{
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mask = *set;
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switch (how)
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{
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case SIG_BLOCK:
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mask = __sigblock(mask);
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break;
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case SIG_UNBLOCK:
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mask = __sigblock (0) & ~mask;
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/* Fall through. */
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case SIG_SETMASK:
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mask = __sigsetmask(mask);
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break;
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default:
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errno = EINVAL;
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return -1;
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}
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}
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else
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mask = __sigblock(0);
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if (oset != NULL)
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*oset = mask;
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return 0;
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}
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weak_alias (__sigprocmask, sigprocmask)
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