/* Add SIG to the calling process' signal mask. Copyright (C) 1998, 2000, 2003 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */ #define __need_NULL #include <stddef.h> #include <signal.h> libc_hidden_proto(sigprocmask) libc_hidden_proto(sigaddset) int sighold (sig) int sig; { sigset_t set; /* Retrieve current signal set. */ if (sigprocmask (SIG_SETMASK, NULL, &set) < 0) return -1; /* Add the specified signal. */ if (sigaddset (&set, sig) < 0) return -1; /* Set the new mask. */ return sigprocmask (SIG_SETMASK, &set, NULL); }