1 /* $NetBSD: t_fifo.c,v 1.4 2017/01/13 21:30:41 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 2002, 2008 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_fifo.c,v 1.4 2017/01/13 21:30:41 christos Exp $"); 36 37 #include <sys/event.h> 38 #include <sys/stat.h> 39 #include <sys/wait.h> 40 41 #include <fcntl.h> 42 #include <stdio.h> 43 #include <stdlib.h> 44 #include <string.h> 45 #include <unistd.h> 46 47 #include <atf-c.h> 48 49 #include "h_macros.h" 50 51 #define FIFONAME "fifo" 52 53 ATF_TC(fifo); 54 ATF_TC_HEAD(fifo, tc) 55 { 56 atf_tc_set_md_var(tc, "descr", "Checks EVFILT_WRITE for fifo"); 57 } 58 ATF_TC_BODY(fifo, tc) 59 { 60 char buffer[128]; 61 struct kevent event[1]; 62 pid_t child; 63 int kq, n, fd, status; 64 65 RL(mkfifo(FIFONAME, 0644)); 66 RL(fd = open(FIFONAME, O_RDWR, 0644)); 67 RL(kq = kqueue()); 68 69 /* spawn child reader */ 70 RL(child = fork()); 71 if (child == 0) { 72 int sz = read(fd, buffer, 128); 73 if (sz > 0) 74 (void)printf("fifo: child read '%.*s'\n", sz, buffer); 75 _exit(sz <= 0); 76 } 77 78 EV_SET(&event[0], fd, EVFILT_WRITE, EV_ADD|EV_ENABLE, 0, 0, 0); 79 RL(kevent(kq, event, 1, NULL, 0, NULL)); 80 81 (void)memset(event, 0, sizeof(event)); 82 RL(n = kevent(kq, NULL, 0, event, 1, NULL)); 83 84 (void)printf("kevent num %d filt %d flags: %#x, fflags: %#x, " 85 "data: %" PRId64 "\n", n, event[0].filter, event[0].flags, 86 event[0].fflags, event[0].data); 87 88 ATF_REQUIRE_EQ(event[0].filter, EVFILT_WRITE); 89 90 RL(write(fd, "foo", 3)); 91 (void)printf("fifo: wrote 'foo'\n"); 92 RL(close(fd)); 93 94 (void)waitpid(child, &status, 0); 95 } 96 97 ATF_TP_ADD_TCS(tp) 98 { 99 ATF_TP_ADD_TC(tp, fifo); 100 101 return atf_no_error(); 102 } 103