/* the Music Player Daemon (MPD) * Copyright (C) 2003-2007 by Warren Dukes (warren.dukes@gmail.com) * (c)2004 by mackstann * This project's homepage is: http://www.musicpd.org * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program 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 General Public License for more details. * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include "signal_check.h" #include <errno.h> #include <stddef.h> static volatile sig_atomic_t __caught_signals[NSIG]; static void __signal_handler(int sig) { __caught_signals[sig] = 1; } static void __set_signal_handler(int sig, void (*handler) (int)) { struct sigaction act; act.sa_flags = 0; sigemptyset(&act.sa_mask); act.sa_handler = handler; while (sigaction(sig, &act, NULL) && errno == EINTR) ; } void signal_handle(int sig) { __set_signal_handler(sig, __signal_handler); } void signal_unhandle(int sig) { signal_clear(sig); __set_signal_handler(sig, SIG_DFL); } int signal_is_pending(int sig) { return __caught_signals[sig]; } void signal_clear(int sig) { __caught_signals[sig] = 0; }