1 /* Copyright (C) 1991, 92, 1994-1998, 2000 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Library General Public License as
6 published by the Free Software Foundation; either version 2 of the
7 License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Library General Public License for more details.
14 You should have received a copy of the GNU Library General Public
15 License along with the GNU C Library; see the file COPYING.LIB. If not,
16 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 Boston, MA 02111-1307, USA. */
21 #include <stddef.h> /* For NULL. */
23 /* Set the mask of blocked signals to MASK,
24 wait for a signal to arrive, and then restore the mask. */
25 int __sigpause (int sig_or_mask, int is_sig)
32 /* The modern X/Open implementation is requested. */
33 if (sigprocmask (0, NULL, &set) < 0
34 /* Yes, we call `sigdelset' and not `__sigdelset'. */
35 || sigdelset (&set, sig_or_mask) < 0)
40 if (sigemptyset (&set) < 0)
43 if (sizeof (sig_or_mask) == sizeof (set))
44 *(int *) &set = sig_or_mask;
45 else if (sizeof (unsigned long int) == sizeof (set))
46 *(unsigned long int *) &set = (unsigned int) sig_or_mask;
48 for (sig = 1; sig < NSIG; ++sig)
49 if ((sig_or_mask & sigmask (sig)) && __sigaddset (&set, sig) < 0)
53 return sigsuspend (&set);
59 /* We have to provide a default version of this function since the
60 standards demand it. The version which is a bit more reasonable is
61 the BSD version. So make this the default. */
62 int sigpause (int mask)
64 return __sigpause (mask, 0);