/* Copyright (C) 1991, 92, 1994-1998, 2000 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include <errno.h> #include <signal.h> #include <stddef.h> /* For NULL. */ /* Set the mask of blocked signals to MASK, wait for a signal to arrive, and then restore the mask. */ int __sigpause (int sig_or_mask, int is_sig) { sigset_t set; int sig; if (is_sig != 0) { /* The modern X/Open implementation is requested. */ if (sigprocmask (0, NULL, &set) < 0 /* Yes, we call `sigdelset' and not `__sigdelset'. */ || sigdelset (&set, sig_or_mask) < 0) return -1; } else { if (sigemptyset (&set) < 0) return -1; if (sizeof (sig_or_mask) == sizeof (set)) *(int *) &set = sig_or_mask; else if (sizeof (unsigned long int) == sizeof (set)) *(unsigned long int *) &set = (unsigned int) sig_or_mask; else for (sig = 1; sig < NSIG; ++sig) if ((sig_or_mask & sigmask (sig)) && __sigaddset (&set, sig) < 0) return -1; } return sigsuspend (&set); } #undef sigpause /* We have to provide a default version of this function since the standards demand it. The version which is a bit more reasonable is the BSD version. So make this the default. */ int sigpause (int mask) { return __sigpause (mask, 0); }