/*********************************************************************** * * * This software is part of the ast package * * Copyright (c) 1985-2007 AT&T Intellectual Property * * and is licensed under the * * Common Public License, Version 1.0 * * by AT&T Intellectual Property * * * * A copy of the License is available at * * http://www.opensource.org/licenses/cpl1.0.txt * * (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) * * * * Information and Software Systems Research * * AT&T Research * * Florham Park NJ * * * * Glenn Fowler <gsf@research.att.com> * * David Korn <dgk@research.att.com> * * Phong Vo <kpv@research.att.com> * * * ***********************************************************************/ #pragma prototyped #include <ast.h> #if _lib_sigunblock NoN(sigunblock) #else #include <sig.h> #ifndef SIG_UNBLOCK #undef _lib_sigprocmask #endif int sigunblock(int s) { #if _lib_sigprocmask int op; sigset_t mask; sigemptyset(&mask); if (s) { sigaddset(&mask, s); op = SIG_UNBLOCK; } else op = SIG_SETMASK; return(sigprocmask(op, &mask, NiL)); #else #if _lib_sigsetmask return(sigsetmask(s ? (sigsetmask(0L) & ~sigmask(s)) : 0L)); #else NoP(s); return(0); #endif #endif } #endif