pause.c revision 6a2f43ce6469c06d0244a07cea3d04f3740a66ce
1/* 2 * Check decoding of pause syscall. 3 * 4 * Copyright (c) 2015-2016 Dmitry V. Levin <ldv@altlinux.org> 5 * Copyright (c) 2016 Fei Jie <feij.fnst@cn.fujitsu.com> 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. The name of the author may not be used to endorse or promote products 17 * derived from this software without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31#include "tests.h" 32#include <asm/unistd.h> 33 34#ifdef __NR_pause 35 36# include <signal.h> 37# include <stdio.h> 38# include <sys/time.h> 39# include <unistd.h> 40 41static void 42handler(int sig) 43{ 44} 45 46int 47main(void) 48{ 49 const struct sigaction act = { .sa_handler = handler }; 50 if (sigaction(SIGALRM, &act, NULL)) 51 perror_msg_and_fail("sigaction"); 52 53 sigset_t mask; 54 sigemptyset(&mask); 55 sigaddset(&mask, SIGALRM); 56 if (sigprocmask(SIG_UNBLOCK, &mask, NULL)) 57 perror_msg_and_fail("sigprocmask"); 58 59 const struct itimerval itv = { .it_value.tv_usec = 123456 }; 60 if (setitimer(ITIMER_REAL, &itv, NULL)) 61 perror_msg_and_fail("setitimer"); 62 63 pause(); 64 printf("pause() = ? ERESTARTNOHAND (To be restarted if no handler)\n"); 65 66 puts("+++ exited with 0 +++"); 67 return 0; 68} 69 70#else 71 72SKIP_MAIN_UNDEFINED("__NR_pause") 73 74#endif 75