1 /* 2 * Check decoding of ERESTARTSYS error code. 3 * 4 * Copyright (c) 2016 Dmitry V. Levin <ldv (at) altlinux.org> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. The name of the author may not be used to endorse or promote products 16 * derived from this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30 #include "tests.h" 31 32 #include <signal.h> 33 #include <stdio.h> 34 #include <sys/time.h> 35 #include <sys/socket.h> 36 #include <unistd.h> 37 38 static int sv[2]; 39 40 static void 41 handler(int sig) 42 { 43 close(sv[1]); 44 sv[1] = -1; 45 } 46 47 int 48 main(void) 49 { 50 if (socketpair(AF_UNIX, SOCK_STREAM, 0, sv)) 51 perror_msg_and_skip("socketpair"); 52 53 const struct sigaction act = { 54 .sa_handler = handler, 55 .sa_flags = SA_RESTART 56 }; 57 if (sigaction(SIGALRM, &act, NULL)) 58 perror_msg_and_fail("sigaction"); 59 60 sigset_t mask; 61 sigemptyset(&mask); 62 sigaddset(&mask, SIGALRM); 63 if (sigprocmask(SIG_UNBLOCK, &mask, NULL)) 64 perror_msg_and_fail("sigprocmask"); 65 66 const struct itimerval itv = { .it_value.tv_usec = 123456 }; 67 if (setitimer(ITIMER_REAL, &itv, NULL)) 68 perror_msg_and_fail("setitimer"); 69 70 if (recvfrom(sv[0], &sv[1], sizeof(sv[1]), 0, NULL, NULL)) 71 perror_msg_and_fail("recvfrom"); 72 73 printf("recvfrom(%d, %p, %d, 0, NULL, NULL) = ? ERESTARTSYS" 74 " (To be restarted if SA_RESTART is set)\n", 75 sv[0], &sv[1], (int) sizeof(sv[1])); 76 printf("recvfrom(%d, \"\", %d, 0, NULL, NULL) = 0\n", 77 sv[0], (int) sizeof(sv[1])); 78 79 puts("+++ exited with 0 +++"); 80 return 0; 81 } 82
