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- /* Copyright (C) 1991, 1992 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
-
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Library General Public License as
- published by the Free Software Foundation; either version 2 of the
- License, or (at your option) any later version.
-
- The GNU C Library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Library General Public License for more details.
-
- You should have received a copy of the GNU Library General Public
- License along with the GNU C Library; see the file COPYING.LIB. If
- not, write to the Free Software Foundation, Inc., 675 Mass Ave,
- Cambridge, MA 02139, USA. */
-
- #include <ansidecl.h>
- #include <errno.h>
- #include <stddef.h>
- #include <signal.h>
-
-
- /* If SET is not NULL, modify the current set of blocked signals
- according to HOW, which may be SIG_BLOCK, SIG_UNBLOCK or SIG_SETMASK.
- If OSET is not NULL, store the old set of blocked signals in *OSET. */
- int
- DEFUN(__sigprocmask, (how, set, oset),
- int how AND CONST sigset_t *set AND sigset_t *oset)
- {
- int mask;
-
- if (set != NULL)
- {
- mask = *set;
- switch (how)
- {
- case SIG_BLOCK:
- mask = __sigblock(mask);
- break;
-
- case SIG_UNBLOCK:
- mask = __sigblock (0) & ~mask;
- /* Fall through. */
-
- case SIG_SETMASK:
- mask = __sigsetmask(mask);
- break;
-
- default:
- errno = EINVAL;
- return -1;
- }
- }
- else
- mask = __sigblock(0);
-
- if (oset != NULL)
- *oset = mask;
-
- return 0;
- }
-