1 /* 2 * Copyright (c) 1989, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #if defined(LIBC_SCCS) && !defined(lint) 31 static char sccsid[] = "@(#)sigcompat.c 8.1 (Berkeley) 6/2/93"; 32 #endif /* LIBC_SCCS and not lint */ 33 #include <sys/cdefs.h> 34 __FBSDID("$FreeBSD$"); 35 36 #include "namespace.h" 37 #include <sys/param.h> 38 #include <signal.h> 39 #include <string.h> 40 #include "un-namespace.h" 41 #include "libc_private.h" 42 43 int 44 sigvec(signo, sv, osv) 45 int signo; 46 struct sigvec *sv, *osv; 47 { 48 struct sigaction sa, osa; 49 struct sigaction *sap, *osap; 50 int ret; 51 52 if (sv != NULL) { 53 sa.sa_handler = sv->sv_handler; 54 sa.sa_flags = sv->sv_flags ^ SV_INTERRUPT; 55 sigemptyset(&sa.sa_mask); 56 sa.sa_mask.__bits[0] = sv->sv_mask; 57 sap = &sa; 58 } else 59 sap = NULL; 60 osap = osv != NULL ? &osa : NULL; 61 ret = _sigaction(signo, sap, osap); 62 if (ret == 0 && osv != NULL) { 63 osv->sv_handler = osa.sa_handler; 64 osv->sv_flags = osa.sa_flags ^ SV_INTERRUPT; 65 osv->sv_mask = osa.sa_mask.__bits[0]; 66 } 67 return (ret); 68 } 69 70 int 71 sigsetmask(mask) 72 int mask; 73 { 74 sigset_t set, oset; 75 int n; 76 77 sigemptyset(&set); 78 set.__bits[0] = mask; 79 n = _sigprocmask(SIG_SETMASK, &set, &oset); 80 if (n) 81 return (n); 82 return (oset.__bits[0]); 83 } 84 85 int 86 sigblock(mask) 87 int mask; 88 { 89 sigset_t set, oset; 90 int n; 91 92 sigemptyset(&set); 93 set.__bits[0] = mask; 94 n = _sigprocmask(SIG_BLOCK, &set, &oset); 95 if (n) 96 return (n); 97 return (oset.__bits[0]); 98 } 99 100 int 101 sigpause(int mask) 102 { 103 sigset_t set; 104 105 sigemptyset(&set); 106 set.__bits[0] = mask; 107 return (_sigsuspend(&set)); 108 } 109 110 int 111 xsi_sigpause(int sig) 112 { 113 sigset_t set; 114 115 sigemptyset(&set); 116 sigaddset(&set, sig); 117 return (_sigsuspend(&set)); 118 } 119 120 int 121 sighold(int sig) 122 { 123 sigset_t set; 124 125 sigemptyset(&set); 126 sigaddset(&set, sig); 127 return (_sigprocmask(SIG_BLOCK, &set, NULL)); 128 } 129 130 int 131 sigignore(int sig) 132 { 133 struct sigaction sa; 134 135 bzero(&sa, sizeof(sa)); 136 sa.sa_handler = SIG_IGN; 137 return (_sigaction(sig, &sa, NULL)); 138 } 139 140 int 141 sigrelse(int sig) 142 { 143 sigset_t set; 144 145 sigemptyset(&set); 146 sigaddset(&set, sig); 147 return (_sigprocmask(SIG_UNBLOCK, &set, NULL)); 148 } 149 150 void 151 (*sigset(int sig, void (*disp)(int)))(int) 152 { 153 sigset_t set, pset; 154 struct sigaction sa, psa; 155 int error; 156 157 sigemptyset(&set); 158 sigaddset(&set, sig); 159 error = _sigprocmask(SIG_BLOCK, NULL, &pset); 160 if (error == -1) 161 return (SIG_ERR); 162 if ((__sighandler_t *)disp == SIG_HOLD) { 163 error = _sigprocmask(SIG_BLOCK, &set, &pset); 164 if (error == -1) 165 return (SIG_ERR); 166 if (sigismember(&pset, sig)) 167 return (SIG_HOLD); 168 else { 169 error = _sigaction(sig, NULL, &psa); 170 if (error == -1) 171 return (SIG_ERR); 172 return (psa.sa_handler); 173 } 174 } else { 175 error = _sigprocmask(SIG_UNBLOCK, &set, &pset); 176 if (error == -1) 177 return (SIG_ERR); 178 } 179 180 bzero(&sa, sizeof(sa)); 181 sa.sa_handler = disp; 182 error = _sigaction(sig, &sa, &psa); 183 if (error == -1) 184 return (SIG_ERR); 185 if (sigismember(&pset, sig)) 186 return (SIG_HOLD); 187 else 188 return (psa.sa_handler); 189 } 190