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; 115 116 if (_sigprocmask(SIG_BLOCK, NULL, &set) == -1) 117 return (-1); 118 if (sigdelset(&set, sig) == -1) 119 return (-1); 120 return (_sigsuspend(&set)); 121 } 122 123 int 124 sighold(int sig) 125 { 126 sigset_t set; 127 128 sigemptyset(&set); 129 if (sigaddset(&set, sig) == -1) 130 return (-1); 131 return (_sigprocmask(SIG_BLOCK, &set, NULL)); 132 } 133 134 int 135 sigignore(int sig) 136 { 137 struct sigaction sa; 138 139 bzero(&sa, sizeof(sa)); 140 sa.sa_handler = SIG_IGN; 141 return (_sigaction(sig, &sa, NULL)); 142 } 143 144 int 145 sigrelse(int sig) 146 { 147 sigset_t set; 148 149 sigemptyset(&set); 150 if (sigaddset(&set, sig) == -1) 151 return (-1); 152 return (_sigprocmask(SIG_UNBLOCK, &set, NULL)); 153 } 154 155 void 156 (*sigset(int sig, void (*disp)(int)))(int) 157 { 158 sigset_t set, pset; 159 struct sigaction sa, psa; 160 161 sigemptyset(&set); 162 if (sigaddset(&set, sig) == -1) 163 return (SIG_ERR); 164 if (_sigprocmask(SIG_BLOCK, NULL, &pset) == -1) 165 return (SIG_ERR); 166 if ((__sighandler_t *)disp == SIG_HOLD) { 167 if (_sigprocmask(SIG_BLOCK, &set, &pset) == -1) 168 return (SIG_ERR); 169 if (sigismember(&pset, sig)) 170 return (SIG_HOLD); 171 else { 172 if (_sigaction(sig, NULL, &psa) == -1) 173 return (SIG_ERR); 174 return (psa.sa_handler); 175 } 176 } else { 177 if (_sigprocmask(SIG_UNBLOCK, &set, &pset) == -1) 178 return (SIG_ERR); 179 } 180 181 bzero(&sa, sizeof(sa)); 182 sa.sa_handler = disp; 183 if (_sigaction(sig, &sa, &psa) == -1) 184 return (SIG_ERR); 185 if (sigismember(&pset, sig)) 186 return (SIG_HOLD); 187 else 188 return (psa.sa_handler); 189 } 190