1/* 2* Copyright (c) 2005, Bull S.A.. All rights reserved. 3* Created by: Sebastien Decugis 4* Copyright (c) 2013 Cyril Hrubis <chrubis@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 set in sa_flags and Real Time Signals extension is supported, 21* sa_sigaction is used as the signal handling function. 22* 23* The steps are: 24* -> test for RTS extension 25* -> register a handler for SIGUSR1 with SA_SIGINFO, and a known function 26* as sa_sigaction 27* -> raise SIGUSR1, and check the function has been called. 28* 29* The test fails if the function is not called 30*/ 31 32/* We are testing conformance to IEEE Std 1003.1, 2003 Edition */ 33#define _POSIX_C_SOURCE 200112L 34 35#include <pthread.h> 36#include <stdarg.h> 37#include <stdio.h> 38#include <stdlib.h> 39#include <string.h> 40#include <unistd.h> 41#include <signal.h> 42#include <errno.h> 43#include "posixtest.h" 44 45#define WRITE(str) write(STDOUT_FILENO, str, sizeof(str) - 1) 46 47static volatile sig_atomic_t called = 0; 48 49static void handler(int sig, siginfo_t *info, void *context) 50{ 51 (void) sig; 52 (void) context; 53 54 if (info->si_signo != SIGUSR1) { 55 WRITE("Wrong signal generated?\n"); 56 _exit(PTS_FAIL); 57 } 58 59 called = 1; 60} 61 62int main(void) 63{ 64 int ret; 65 long rts; 66 67 struct sigaction sa; 68 69 /* Test the RTS extension */ 70 rts = sysconf(_SC_REALTIME_SIGNALS); 71 72 if (rts < 0L) { 73 fprintf(stderr, "This test needs the RTS extension"); 74 return PTS_UNTESTED; 75 } 76 77 /* Set the signal handler */ 78 sa.sa_flags = SA_SIGINFO; 79 sa.sa_sigaction = handler; 80 81 ret = sigemptyset(&sa.sa_mask); 82 83 if (ret != 0) { 84 perror("Failed to empty signal set"); 85 return PTS_UNRESOLVED; 86 } 87 88 /* Install the signal handler for SIGUSR1 */ 89 ret = sigaction(SIGUSR1, &sa, 0); 90 91 if (ret != 0) { 92 perror("Failed to set signal handler"); 93 return PTS_UNTESTED; 94 } 95 96 if (called) { 97 fprintf(stderr, 98 "The signal handler has been called before signal was raised"); 99 return PTS_FAIL; 100 } 101 102 ret = raise(SIGUSR1); 103 104 if (ret != 0) { 105 perror("Failed to raise SIGUSR1"); 106 return PTS_UNRESOLVED; 107 } 108 109 if (!called) { 110 fprintf(stderr, "The sa_handler was not called"); 111 return PTS_FAIL; 112 } 113 114 printf("Test PASSED\n"); 115 116 return PTS_PASS; 117} 118