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      1 /*
      2 * Copyright (c) 2005, Bull S.A..  All rights reserved.
      3 * Created by: Sebastien Decugis
      4 * Copyright (c) 2013 Cyril Hrubis <chrubis (at) suse.cz>
      5 *
      6 * This program is free software; you can redistribute it and/or modify it
      7 * under the terms of version 2 of the GNU General Public License as
      8 * published by the Free Software Foundation.
      9 *
     10 * This program is distributed in the hope that it would be useful, but
     11 * WITHOUT ANY WARRANTY; without even the implied warranty of
     12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
     13 *
     14 * You should have received a copy of the GNU General Public License along
     15 * with this program; if not, write the Free Software Foundation, Inc.,
     16 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
     17 *
     18 * This sample test aims to check the following assertions:
     19 *
     20 * If SA_SIGINFO is not set in sa_flags, sa_handler is used as the signal
     21 * handling function.
     22 *
     23 * The steps are:
     24 * -> register a handler for SIGILL without SA_SIGINFO, and a known function
     25 *   as sa_handler
     26 * -> raise SIGILL, and check the function has been called.
     27 *
     28 * The test fails if the function is not called
     29 */
     30 
     31 /* We are testing conformance to IEEE Std 1003.1, 2003 Edition */
     32 #define _POSIX_C_SOURCE 200112L
     33 
     34 #include <pthread.h>
     35 #include <stdarg.h>
     36 #include <stdio.h>
     37 #include <stdlib.h>
     38 #include <string.h>
     39 #include <unistd.h>
     40 
     41 #include <signal.h>
     42 #include <errno.h>
     43 
     44 #include "posixtest.h"
     45 
     46 static volatile sig_atomic_t called = 0;
     47 
     48 static void handler()
     49 {
     50 	called = 1;
     51 }
     52 
     53 int main(void)
     54 {
     55 	int ret;
     56 	struct sigaction sa;
     57 
     58 	/* Set the signal handler */
     59 	sa.sa_flags = 0;
     60 	sa.sa_handler = handler;
     61 	ret = sigemptyset(&sa.sa_mask);
     62 
     63 	if (ret != 0) {
     64 		perror("Failed to empty signal set");
     65 		return PTS_UNRESOLVED;
     66 	}
     67 
     68 	/* Install the signal handler for SIGILL */
     69 	ret = sigaction(SIGILL, &sa, 0);
     70 
     71 	if (ret != 0) {
     72 		perror("Failed to set signal handler");
     73 		return PTS_UNRESOLVED;
     74 	}
     75 
     76 	if (called) {
     77 		fprintf(stderr,
     78 			"The signal handler has been called before signal was raised");
     79 		return PTS_FAIL;
     80 	}
     81 
     82 	ret = raise(SIGILL);
     83 
     84 	if (ret != 0) {
     85 		perror("Failed to raise SIGILL");
     86 		return PTS_UNRESOLVED;
     87 	}
     88 
     89 	if (!called) {
     90 		fprintf(stderr, "The sa_handler was not called\n");
     91 		return PTS_FAIL;
     92 	}
     93 
     94 	printf("Test PASSED\n");
     95 
     96 	return PTS_PASS;
     97 }
     98