1 /* $NetBSD: t_pipe.c,v 1.2 2017/01/13 21:30:41 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 2002 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Luke Mewburn and Jaromir Dolecek. 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 __COPYRIGHT("@(#) Copyright (c) 2008\ 34 The NetBSD Foundation, inc. All rights reserved."); 35 __RCSID("$NetBSD: t_pipe.c,v 1.2 2017/01/13 21:30:41 christos Exp $"); 36 37 #include <sys/event.h> 38 #include <sys/wait.h> 39 40 #include <fcntl.h> 41 #include <stdio.h> 42 #include <stdlib.h> 43 #include <unistd.h> 44 45 #include <atf-c.h> 46 47 #include "h_macros.h" 48 49 ATF_TC(pipe1); 50 ATF_TC_HEAD(pipe1, tc) 51 { 52 atf_tc_set_md_var(tc, "descr", 53 "Checks EVFILT_WRITE for pipes. This test used to trigger " 54 "problem fixed in rev. 1.5.2.7 of sys/kern/sys_pipe.c"); 55 } 56 ATF_TC_BODY(pipe1, tc) 57 { 58 struct kevent event[1]; 59 int fds[2]; 60 int kq, n; 61 62 RL(pipe(fds)); 63 RL(kq = kqueue()); 64 RL(close(fds[0])); 65 66 EV_SET(&event[0], fds[1], EVFILT_WRITE, EV_ADD|EV_ENABLE, 0, 0, 0); 67 ATF_REQUIRE_EQ_MSG((n = kevent(kq, event, 1, NULL, 0, NULL)), 68 -1, "got: %d", n); 69 ATF_REQUIRE_EQ_MSG(errno, EBADF, "got: %s", strerror(errno)); 70 } 71 72 ATF_TC(pipe2); 73 ATF_TC_HEAD(pipe2, tc) 74 { 75 atf_tc_set_md_var(tc, "descr", 76 "Checks EVFILT_WRITE for pipes. This test used to trigger problem " 77 "fixed in rev. 1.5.2.9 of sys/kern/sys_pipe.c"); 78 } 79 ATF_TC_BODY(pipe2, tc) 80 { 81 struct kevent event[1]; 82 char buffer[128]; 83 int fds[2]; 84 int kq, n; 85 int status; 86 pid_t child; 87 88 RL(pipe(fds)); 89 RL(kq = kqueue()); 90 91 EV_SET(&event[0], fds[1], EVFILT_WRITE, EV_ADD|EV_ENABLE, 0, 0, 0); 92 RL(kevent(kq, event, 1, NULL, 0, NULL)); 93 94 /* spawn child reader */ 95 RL(child = fork()); 96 if (child == 0) { 97 int sz = read(fds[0], buffer, 128); 98 if (sz > 0) 99 (void)printf("pipe: child read '%.*s'\n", sz, buffer); 100 exit(sz <= 0); 101 } 102 103 RL(n = kevent(kq, NULL, 0, event, 1, NULL)); 104 105 (void)printf("kevent num %d flags: %#x, fflags: %#x, data: " 106 "%" PRId64 "\n", n, event[0].flags, event[0].fflags, event[0].data); 107 108 RL(n = write(fds[1], "foo", 3)); 109 RL(close(fds[1])); 110 111 (void)waitpid(child, &status, 0); 112 } 113 114 ATF_TC(pipe3); 115 ATF_TC_HEAD(pipe3, tc) 116 { 117 atf_tc_set_md_var(tc, "descr", 118 "Checks EVFILT_WRITE for pipes. This test used to trigger problem " 119 "fixed in rev. 1.5.2.10 of sys/kern/sys_pipe.c"); 120 } 121 ATF_TC_BODY(pipe3, tc) 122 { 123 struct kevent event[1]; 124 int fds[2]; 125 int kq; 126 127 RL(pipe(fds)); 128 RL(kq = kqueue()); 129 130 EV_SET(&event[0], fds[1], EVFILT_WRITE, EV_ADD|EV_ENABLE, 0, 0, 0); 131 RL(kevent(kq, event, 1, NULL, 0, NULL)); 132 133 /* close 'read' end first, then 'write' */ 134 135 RL(close(fds[0])); 136 RL(close(fds[1])); 137 } 138 139 140 ATF_TP_ADD_TCS(tp) 141 { 142 ATF_TP_ADD_TC(tp, pipe1); 143 ATF_TP_ADD_TC(tp, pipe2); 144 ATF_TP_ADD_TC(tp, pipe3); 145 146 return atf_no_error(); 147 } 148