1 /* $NetBSD: t_open_pr_57260.c,v 1.2 2023/04/23 00:46:46 gutteridge Exp $ */ 2 3 /*- 4 * Copyright (c) 2023 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Taylor R. Campbell and David H. Gutteridge. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __RCSID("$NetBSD: t_open_pr_57260.c,v 1.2 2023/04/23 00:46:46 gutteridge Exp $"); 34 35 #include <sys/stat.h> 36 37 #include <fcntl.h> 38 #include <setjmp.h> 39 #include <signal.h> 40 #include <unistd.h> 41 42 #include <atf-c.h> 43 #include "h_macros.h" 44 45 static jmp_buf env; 46 static sig_atomic_t alarmed = 0; 47 48 static void 49 on_alarm(int sig) 50 { 51 52 if (!alarmed) { 53 alarmed = 1; 54 alarm(1); 55 } else { 56 longjmp(env, 1); 57 } 58 } 59 60 ATF_TC(openrestartsignal); 61 ATF_TC_HEAD(openrestartsignal, tc) 62 { 63 64 atf_tc_set_md_var(tc, "descr", "open(2) should restart on signal " 65 "(PR kern/57260)"); 66 } 67 68 ATF_TC_BODY(openrestartsignal, tc) 69 { 70 struct sigaction sa; 71 int fd; 72 73 memset(&sa, 0, sizeof(sa)); 74 sa.sa_handler = on_alarm; 75 (void)sigfillset(&sa.sa_mask); 76 sa.sa_flags = SA_RESTART; 77 if (sigaction(SIGALRM, &sa, NULL) == -1) 78 atf_tc_fail_errno("sigaction"); 79 80 if (mkfifo("fifo", 0600) == -1) 81 atf_tc_fail_errno("mkfifo"); 82 alarm(1); 83 if (setjmp(env)) 84 /* second signal handler longjmped out */ 85 return; 86 fd = open("fifo", O_RDONLY); 87 if (fd == -1) 88 atf_tc_fail_errno("open"); 89 atf_tc_fail("open returned %d", fd); 90 } 91 92 ATF_TP_ADD_TCS(tp) 93 { 94 95 ATF_TP_ADD_TC(tp, openrestartsignal); 96 97 return atf_no_error(); 98 } 99