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 <errno.h> 39 #include <signal.h> 40 #include <string.h> 41 #include "un-namespace.h" 42 #include "libc_private.h" 43 44 int 45 sigvec(signo, sv, osv) 46 int signo; 47 struct sigvec *sv, *osv; 48 { 49 struct sigaction sa, osa; 50 struct sigaction *sap, *osap; 51 int ret; 52 53 if (sv != NULL) { 54 sa.sa_handler = sv->sv_handler; 55 sa.sa_flags = sv->sv_flags ^ SV_INTERRUPT; 56 sigemptyset(&sa.sa_mask); 57 sa.sa_mask.__bits[0] = sv->sv_mask; 58 sap = &sa; 59 } else 60 sap = NULL; 61 osap = osv != NULL ? &osa : NULL; 62 ret = _sigaction(signo, sap, osap); 63 if (ret == 0 && osv != NULL) { 64 osv->sv_handler = osa.sa_handler; 65 osv->sv_flags = osa.sa_flags ^ SV_INTERRUPT; 66 osv->sv_mask = osa.sa_mask.__bits[0]; 67 } 68 return (ret); 69 } 70 71 int 72 sigsetmask(mask) 73 int mask; 74 { 75 sigset_t set, oset; 76 int n; 77 78 sigemptyset(&set); 79 set.__bits[0] = mask; 80 n = _sigprocmask(SIG_SETMASK, &set, &oset); 81 if (n) 82 return (n); 83 return (oset.__bits[0]); 84 } 85 86 int 87 sigblock(mask) 88 int mask; 89 { 90 sigset_t set, oset; 91 int n; 92 93 sigemptyset(&set); 94 set.__bits[0] = mask; 95 n = _sigprocmask(SIG_BLOCK, &set, &oset); 96 if (n) 97 return (n); 98 return (oset.__bits[0]); 99 } 100 101 int 102 sigpause(int mask) 103 { 104 sigset_t set; 105 106 sigemptyset(&set); 107 set.__bits[0] = mask; 108 return (_sigsuspend(&set)); 109 } 110 111 int 112 xsi_sigpause(int sig) 113 { 114 sigset_t set; 115 int error; 116 117 if (!_SIG_VALID(sig)) { 118 errno = EINVAL; 119 return (-1); 120 } 121 error = _sigprocmask(SIG_BLOCK, NULL, &set); 122 if (error != 0) 123 return (error); 124 sigdelset(&set, sig); 125 return (_sigsuspend(&set)); 126 } 127 128 int 129 sighold(int sig) 130 { 131 sigset_t set; 132 133 sigemptyset(&set); 134 sigaddset(&set, sig); 135 return (_sigprocmask(SIG_BLOCK, &set, NULL)); 136 } 137 138 int 139 sigignore(int sig) 140 { 141 struct sigaction sa; 142 143 bzero(&sa, sizeof(sa)); 144 sa.sa_handler = SIG_IGN; 145 return (_sigaction(sig, &sa, NULL)); 146 } 147 148 int 149 sigrelse(int sig) 150 { 151 sigset_t set; 152 153 sigemptyset(&set); 154 sigaddset(&set, sig); 155 return (_sigprocmask(SIG_UNBLOCK, &set, NULL)); 156 } 157 158 void 159 (*sigset(int sig, void (*disp)(int)))(int) 160 { 161 sigset_t set, pset; 162 struct sigaction sa, psa; 163 int error; 164 165 sigemptyset(&set); 166 sigaddset(&set, sig); 167 error = _sigprocmask(SIG_BLOCK, NULL, &pset); 168 if (error == -1) 169 return (SIG_ERR); 170 if ((__sighandler_t *)disp == SIG_HOLD) { 171 error = _sigprocmask(SIG_BLOCK, &set, &pset); 172 if (error == -1) 173 return (SIG_ERR); 174 if (sigismember(&pset, sig)) 175 return (SIG_HOLD); 176 else { 177 error = _sigaction(sig, NULL, &psa); 178 if (error == -1) 179 return (SIG_ERR); 180 return (psa.sa_handler); 181 } 182 } else { 183 error = _sigprocmask(SIG_UNBLOCK, &set, &pset); 184 if (error == -1) 185 return (SIG_ERR); 186 } 187 188 bzero(&sa, sizeof(sa)); 189 sa.sa_handler = disp; 190 error = _sigaction(sig, &sa, &psa); 191 if (error == -1) 192 return (SIG_ERR); 193 if (sigismember(&pset, sig)) 194 return (SIG_HOLD); 195 else 196 return (psa.sa_handler); 197 } 198