1 /* $OpenBSD: sigabrt.c,v 1.2 2016/01/09 06:13:43 semarie Exp $ */ 2 /* 3 * Copyright (c) 2015 Sebastien Marie <semarie@openbsd.org> 4 * 5 * Permission to use, copy, modify, and distribute this software for any 6 * purpose with or without fee is hereby granted, provided that the above 7 * copyright notice and this permission notice appear in all copies. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16 */ 17 18 #include <err.h> 19 #include <stdio.h> 20 #include <stdlib.h> 21 #include <signal.h> 22 #include <unistd.h> 23 24 void 25 handler(int sigraised) 26 { 27 /* this handler shouldn't not be called */ 28 printf("forbidden STDIO in SIGABRT handler\n"); 29 } 30 31 int 32 main(int argc, char *argv[]) 33 { 34 /* install SIGABRT handler */ 35 signal(SIGABRT, &handler); 36 37 printf("permitted STDIO\n"); 38 fflush(stdout); 39 40 if (pledge("", NULL) == -1) 41 err(EXIT_FAILURE, "pledge"); 42 43 /* this will triggered pledge_fail() */ 44 printf("forbidden STDIO 1\n"); 45 46 /* shouldn't continue */ 47 printf("forbidden STDIO 2\n"); 48 return (EXIT_SUCCESS); 49 } 50