14887Schin /*********************************************************************** 24887Schin * * 34887Schin * This software is part of the ast package * 4*12068SRoger.Faulkner@Oracle.COM * Copyright (c) 1985-2010 AT&T Intellectual Property * 54887Schin * and is licensed under the * 64887Schin * Common Public License, Version 1.0 * 78462SApril.Chin@Sun.COM * by AT&T Intellectual Property * 84887Schin * * 94887Schin * A copy of the License is available at * 104887Schin * http://www.opensource.org/licenses/cpl1.0.txt * 114887Schin * (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) * 124887Schin * * 134887Schin * Information and Software Systems Research * 144887Schin * AT&T Research * 154887Schin * Florham Park NJ * 164887Schin * * 174887Schin * Glenn Fowler <gsf@research.att.com> * 184887Schin * David Korn <dgk@research.att.com> * 194887Schin * Phong Vo <kpv@research.att.com> * 204887Schin * * 214887Schin ***********************************************************************/ 224887Schin #pragma prototyped 234887Schin 244887Schin #include <ast.h> 254887Schin 264887Schin #if _lib_sigunblock 274887Schin 284887Schin NoN(sigunblock) 294887Schin 304887Schin #else 314887Schin 324887Schin #include <sig.h> 334887Schin 344887Schin #ifndef SIG_UNBLOCK 354887Schin #undef _lib_sigprocmask 364887Schin #endif 374887Schin 384887Schin int 394887Schin sigunblock(int s) 404887Schin { 414887Schin #if _lib_sigprocmask 424887Schin int op; 434887Schin sigset_t mask; 444887Schin 454887Schin sigemptyset(&mask); 464887Schin if (s) 474887Schin { 484887Schin sigaddset(&mask, s); 494887Schin op = SIG_UNBLOCK; 504887Schin } 514887Schin else op = SIG_SETMASK; 524887Schin return(sigprocmask(op, &mask, NiL)); 534887Schin #else 544887Schin #if _lib_sigsetmask 554887Schin return(sigsetmask(s ? (sigsetmask(0L) & ~sigmask(s)) : 0L)); 564887Schin #else 574887Schin NoP(s); 584887Schin return(0); 594887Schin #endif 604887Schin #endif 614887Schin } 624887Schin 634887Schin #endif 64