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 * 3. 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(int signo, struct sigvec *sv, struct sigvec *osv) 46 { 47 struct sigaction sa, osa; 48 struct sigaction *sap, *osap; 49 int ret; 50 51 if (sv != NULL) { 52 sa.sa_handler = sv->sv_handler; 53 sa.sa_flags = sv->sv_flags ^ SV_INTERRUPT; 54 sigemptyset(&sa.sa_mask); 55 sa.sa_mask.__bits[0] = sv->sv_mask; 56 sap = &sa; 57 } else 58 sap = NULL; 59 osap = osv != NULL ? &osa : NULL; 60 ret = __libc_sigaction(signo, sap, osap); 61 if (ret == 0 && osv != NULL) { 62 osv->sv_handler = osa.sa_handler; 63 osv->sv_flags = osa.sa_flags ^ SV_INTERRUPT; 64 osv->sv_mask = osa.sa_mask.__bits[0]; 65 } 66 return (ret); 67 } 68 69 int 70 sigsetmask(int mask) 71 { 72 sigset_t set, oset; 73 int n; 74 75 sigemptyset(&set); 76 set.__bits[0] = mask; 77 n = __libc_sigprocmask(SIG_SETMASK, &set, &oset); 78 if (n) 79 return (n); 80 return (oset.__bits[0]); 81 } 82 83 int 84 sigblock(int mask) 85 { 86 sigset_t set, oset; 87 int n; 88 89 sigemptyset(&set); 90 set.__bits[0] = mask; 91 n = __libc_sigprocmask(SIG_BLOCK, &set, &oset); 92 if (n) 93 return (n); 94 return (oset.__bits[0]); 95 } 96 97 int 98 sigpause(int mask) 99 { 100 sigset_t set; 101 102 sigemptyset(&set); 103 set.__bits[0] = mask; 104 return (__libc_sigsuspend(&set)); 105 } 106 107 int 108 xsi_sigpause(int sig) 109 { 110 sigset_t set; 111 112 if (__libc_sigprocmask(SIG_BLOCK, NULL, &set) == -1) 113 return (-1); 114 if (sigdelset(&set, sig) == -1) 115 return (-1); 116 return (__libc_sigsuspend(&set)); 117 } 118 119 int 120 sighold(int sig) 121 { 122 sigset_t set; 123 124 sigemptyset(&set); 125 if (sigaddset(&set, sig) == -1) 126 return (-1); 127 return (__libc_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 (__libc_sigaction(sig, &sa, NULL)); 138 } 139 140 int 141 sigrelse(int sig) 142 { 143 sigset_t set; 144 145 sigemptyset(&set); 146 if (sigaddset(&set, sig) == -1) 147 return (-1); 148 return (__libc_sigprocmask(SIG_UNBLOCK, &set, NULL)); 149 } 150 151 void 152 (*sigset(int sig, void (*disp)(int)))(int) 153 { 154 sigset_t set, pset; 155 struct sigaction sa, psa; 156 157 sigemptyset(&set); 158 if (sigaddset(&set, sig) == -1) 159 return (SIG_ERR); 160 if (__libc_sigprocmask(SIG_BLOCK, NULL, &pset) == -1) 161 return (SIG_ERR); 162 if ((__sighandler_t *)disp == SIG_HOLD) { 163 if (__libc_sigprocmask(SIG_BLOCK, &set, &pset) == -1) 164 return (SIG_ERR); 165 if (sigismember(&pset, sig)) 166 return (SIG_HOLD); 167 else { 168 if (__libc_sigaction(sig, NULL, &psa) == -1) 169 return (SIG_ERR); 170 return (psa.sa_handler); 171 } 172 } else { 173 if (__libc_sigprocmask(SIG_UNBLOCK, &set, &pset) == -1) 174 return (SIG_ERR); 175 } 176 177 bzero(&sa, sizeof(sa)); 178 sa.sa_handler = disp; 179 if (__libc_sigaction(sig, &sa, &psa) == -1) 180 return (SIG_ERR); 181 if (sigismember(&pset, sig)) 182 return (SIG_HOLD); 183 else 184 return (psa.sa_handler); 185 } 186