1 /* $OpenBSD: sigaction.c,v 1.4 2001/01/22 18:01:48 millert Exp $ */ 2 3 /**************************************************************************** 4 * Copyright (c) 1998,2000 Free Software Foundation, Inc. * 5 * * 6 * Permission is hereby granted, free of charge, to any person obtaining a * 7 * copy of this software and associated documentation files (the * 8 * "Software"), to deal in the Software without restriction, including * 9 * without limitation the rights to use, copy, modify, merge, publish, * 10 * distribute, distribute with modifications, sublicense, and/or sell * 11 * copies of the Software, and to permit persons to whom the Software is * 12 * furnished to do so, subject to the following conditions: * 13 * * 14 * The above copyright notice and this permission notice shall be included * 15 * in all copies or substantial portions of the Software. * 16 * * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * 18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * 19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * 20 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * 21 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * 22 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * 23 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * 24 * * 25 * Except as contained in this notice, the name(s) of the above copyright * 26 * holders shall not be used in advertising or otherwise to promote the * 27 * sale, use or other dealings in this Software without prior written * 28 * authorization. * 29 ****************************************************************************/ 30 31 /**************************************************************************** 32 * Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 * 33 * and: Eric S. Raymond <esr@snark.thyrsus.com> * 34 ****************************************************************************/ 35 36 /* OPENBSD ORIGINAL: lib/libcurses/base/sigaction.c */ 37 38 #include "includes.h" 39 #include <errno.h> 40 #include <signal.h> 41 #include "sigact.h" 42 43 /* This file provides sigaction() emulation using sigvec() */ 44 /* Use only if this is non POSIX system */ 45 46 #if !HAVE_SIGACTION && HAVE_SIGVEC 47 48 int sigaction(int sig,struct sigaction * sigact,struct sigaction * osigact)49 sigaction(int sig, struct sigaction *sigact, struct sigaction *osigact) 50 { 51 return sigvec(sig, sigact ? &sigact->sv : NULL, 52 osigact ? &osigact->sv : NULL); 53 } 54 55 int sigemptyset(sigset_t * mask)56 sigemptyset (sigset_t *mask) 57 { 58 if (!mask) { 59 errno = EINVAL; 60 return -1; 61 } 62 *mask = 0; 63 return 0; 64 } 65 66 int sigprocmask(int mode,sigset_t * mask,sigset_t * omask)67 sigprocmask (int mode, sigset_t *mask, sigset_t *omask) 68 { 69 sigset_t current = sigsetmask(0); 70 71 if (!mask) { 72 errno = EINVAL; 73 return -1; 74 } 75 76 if (omask) 77 *omask = current; 78 79 if (mode == SIG_BLOCK) 80 current |= *mask; 81 else if (mode == SIG_UNBLOCK) 82 current &= ~*mask; 83 else if (mode == SIG_SETMASK) 84 current = *mask; 85 86 sigsetmask(current); 87 return 0; 88 } 89 90 int sigsuspend(sigset_t * mask)91 sigsuspend (sigset_t *mask) 92 { 93 if (!mask) { 94 errno = EINVAL; 95 return -1; 96 } 97 return sigpause(*mask); 98 } 99 100 int sigdelset(sigset_t * mask,int sig)101 sigdelset (sigset_t *mask, int sig) 102 { 103 if (!mask) { 104 errno = EINVAL; 105 return -1; 106 } 107 *mask &= ~sigmask(sig); 108 return 0; 109 } 110 111 int sigaddset(sigset_t * mask,int sig)112 sigaddset (sigset_t *mask, int sig) 113 { 114 if (!mask) { 115 errno = EINVAL; 116 return -1; 117 } 118 *mask |= sigmask(sig); 119 return 0; 120 } 121 122 int sigismember(sigset_t * mask,int sig)123 sigismember (sigset_t *mask, int sig) 124 { 125 if (!mask) { 126 errno = EINVAL; 127 return -1; 128 } 129 return (*mask & sigmask(sig)) != 0; 130 } 131 132 #endif 133