| 123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657 |
- /*
- * 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 @(#)sigset.c 1.7 (gritter) 1/22/06 */
- #include <sys/param.h>
- #if defined (__FreeBSD__) || defined (__dietlibc__) || defined (__NetBSD__) || \
- defined (__OpenBSD__) || defined (__DragonFly__) || defined (__APPLE__) || \
- defined (__UCLIBC__)
- #include <signal.h>
- #include "sigset.h"
- void (*sigset(int sig, void (*func)(int)))(int)
- {
- struct sigaction nact, oact;
- sigset_t nset, oset;
- if (sig <= 0)
- return SIG_ERR;
- sigemptyset(&nset);
- sigaddset(&nset, sig);
- if (sigprocmask(func==SIG_HOLD?SIG_BLOCK:SIG_UNBLOCK, &nset, &oset) < 0)
- return SIG_ERR;
- nact.sa_handler = func;
- nact.sa_flags = 0;
- if (sig == SIGCHLD && func == SIG_IGN)
- nact.sa_flags |= SA_NOCLDSTOP|SA_NOCLDWAIT;
- sigemptyset(&nact.sa_mask);
- sigaddset(&nact.sa_mask, sig);
- if (sigaction(sig, func==SIG_HOLD?(struct sigaction *)0:&nact, &oact)
- == -1)
- return SIG_ERR;
- if (sigismember(&oset, sig))
- return SIG_HOLD;
- else
- return (oact.sa_handler);
- }
- #endif /* __FreeBSD__ || __dietlibc__ || __NetBSD__ || __OpenBSD__ ||
- __DragonFly__ || __APPLE__ || __UCLIBC__ */
|
