1 /* $NetBSD: sigcompat.c,v 1.10 1998/09/27 13:21:28 christos Exp $ */ 2 3 /* 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 #if defined(LIBC_SCCS) && !defined(lint) 38 #if 0 39 static char sccsid[] = "@(#)sigcompat.c 8.1 (Berkeley) 6/2/93"; 40 #else 41 __RCSID("$NetBSD: sigcompat.c,v 1.10 1998/09/27 13:21:28 christos Exp $"); 42 #endif 43 #endif /* LIBC_SCCS and not lint */ 44 45 #include <sys/param.h> 46 #include <signal.h> 47 48 static __inline void sv2sa __P((struct sigaction *, const struct sigvec *)); 49 static __inline void sa2sv __P((struct sigvec *, const struct sigaction *)); 50 51 static __inline void 52 sv2sa(sa, sv) 53 struct sigaction *sa; 54 const struct sigvec *sv; 55 { 56 sigemptyset(&sa->sa_mask); 57 sa->sa_mask.__bits[0] = sv->sv_mask; 58 sa->sa_handler = sv->sv_handler; 59 sa->sa_flags = sv->sv_flags ^ SV_INTERRUPT; /* !SA_INTERRUPT */ 60 } 61 62 static __inline void 63 sa2sv(sv, sa) 64 struct sigvec *sv; 65 const struct sigaction *sa; 66 { 67 sv->sv_mask = sa->sa_mask.__bits[0]; 68 sv->sv_handler = sa->sa_handler; 69 sv->sv_flags = sa->sa_flags ^ SV_INTERRUPT; /* !SA_INTERRUPT */ 70 } 71 72 int 73 sigvec(signo, nsv, osv) 74 int signo; 75 struct sigvec *nsv, *osv; 76 { 77 int ret; 78 struct sigaction osa, nsa; 79 80 if (nsv) 81 sv2sa(&nsa, nsv); 82 83 ret = sigaction(signo, nsv ? &nsa : NULL, osv ? &osa : NULL); 84 85 if (ret == 0 && osv) 86 sa2sv(osv, &osa); 87 88 return (ret); 89 } 90 91 int 92 sigsetmask(mask) 93 int mask; 94 { 95 sigset_t nmask, omask; 96 int n; 97 98 sigemptyset(&nmask); 99 nmask.__bits[0] = mask; 100 101 n = sigprocmask(SIG_SETMASK, &nmask, &omask); 102 if (n) 103 return (n); 104 return (omask.__bits[0]); 105 } 106 107 int 108 sigblock(mask) 109 int mask; 110 { 111 sigset_t nmask, omask; 112 int n; 113 114 sigemptyset(&nmask); 115 nmask.__bits[0] = mask; 116 117 n = sigprocmask(SIG_BLOCK, &nmask, &omask); 118 if (n) 119 return (n); 120 return (omask.__bits[0]); 121 } 122 123 int 124 sigpause(mask) 125 int mask; 126 { 127 sigset_t nmask; 128 129 sigemptyset(&nmask); 130 nmask.__bits[0] = mask; 131 return (sigsuspend(&nmask)); 132 } 133