/* * Copyright (c) 2004 Gunnar Ritter * * This software is provided 'as-is', without any express or implied * warranty. In no event will the authors be held liable for any damages * arising from the use of this software. * * Permission is granted to anyone to use this software for any purpose, * including commercial applications, and to alter it and redistribute * it freely, subject to the following restrictions: * * 1. The origin of this software must not be misrepresented; you must not * claim that you wrote the original software. If you use this software * in a product, an acknowledgment in the product documentation would be * appreciated but is not required. * * 2. Altered source versions must be plainly marked as such, and must not be * misrepresented as being the original software. * * 3. This notice may not be removed or altered from any source distribution. */ /* Sccsid @(#)signal.c 1.6 (gritter) 1/22/06 */ #if defined (__FreeBSD__) || defined (__dietlibc__) || defined (__NetBSD__) || \ defined (__OpenBSD__) || defined (__DragonFly__) || defined (__APPLE__) || \ defined (__UCLIBC__) #include <signal.h> #include "sigset.h" void (*signal(int sig, void (*func)(int)))(int) { struct sigaction nact, oact; if (sig <= 0) return SIG_ERR; nact.sa_handler = func; nact.sa_flags = SA_RESETHAND|SA_NODEFER; if (sig == SIGCHLD && func == SIG_IGN) nact.sa_flags |= SA_NOCLDSTOP|SA_NOCLDWAIT; sigemptyset(&nact.sa_mask); if (sigaction(sig, &nact, &oact) == -1) return SIG_ERR; return oact.sa_handler; } #endif /* __FreeBSD__ || __dietlibc__ || __NetBSD__ || __OpenBSD__ || __DragonFly__ || __APPLE__ || __UCLIBC__ */