1 /* 2 * Copyright (c) 1999-2004 Damien Miller <djm@mindrot.org> 3 * 4 * Permission to use, copy, modify, and distribute this software for any 5 * purpose with or without fee is hereby granted, provided that the above 6 * copyright notice and this permission notice appear in all copies. 7 * 8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 15 */ 16 17 #include "includes.h" 18 19 #include <signal.h> 20 #include <string.h> 21 #include <unistd.h> 22 23 #include "openbsd-compat/bsd-signal.h" 24 25 #undef signal 26 27 mysig_t 28 mysignal(int sig, mysig_t act) 29 { 30 #ifdef HAVE_SIGACTION 31 struct sigaction sa, osa; 32 33 if (sigaction(sig, NULL, &osa) == -1) 34 return (mysig_t) -1; 35 if (osa.sa_handler != act) { 36 memset(&sa, 0, sizeof(sa)); 37 sigemptyset(&sa.sa_mask); 38 sa.sa_flags = 0; 39 #ifdef SA_INTERRUPT 40 if (sig == SIGALRM) 41 sa.sa_flags |= SA_INTERRUPT; 42 #endif 43 sa.sa_handler = act; 44 if (sigaction(sig, &sa, NULL) == -1) 45 return (mysig_t) -1; 46 } 47 return (osa.sa_handler); 48 #else 49 return (signal(sig, act)); 50 #endif 51 } 52 53 #if !defined(HAVE_STRSIGNAL) 54 char *strsignal(int sig) 55 { 56 static char buf[16]; 57 58 (void)snprintf(buf, sizeof(buf), "%d", sig); 59 return buf; 60 } 61 #endif 62 63