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- /* Copyright (C) 1991, 1994 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 <signal.h>
-
- /* Set the mask of blocked signals to MASK, returning the old mask. */
- int
- DEFUN(__sigsetmask, (mask), int mask)
- {
- register int sig;
- sigset_t set, oset;
-
- if (__sigemptyset(&set) < 0)
- return -1;
-
- if (sizeof (mask) == sizeof (set))
- *(int *) &set = mask;
- else
- for (sig = 1; sig < NSIG; ++sig)
- if ((mask & sigmask(sig)) &&
- __sigaddset(&set, sig) < 0)
- return -1;
-
- if (sigprocmask(SIG_SETMASK, &set, &oset) < 0)
- return -1;
-
- mask = 0;
- if (sizeof (mask) == sizeof (oset))
- mask = *(int *) &oset;
- else
- for (sig = 1; sig < NSIG; ++sig)
- if (__sigismember(&oset, sig))
- mask |= sigmask(sig);
-
- return mask;
- }
-