t_sig.c revision 272343
1/* $NetBSD: t_sig.c,v 1.2 2010/11/03 16:10:20 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_sig.c,v 1.2 2010/11/03 16:10:20 christos Exp $"); 36 37#include <sys/event.h> 38#include <sys/ioctl.h> 39#include <sys/param.h> 40#include <sys/time.h> 41#include <sys/wait.h> 42 43#include <inttypes.h> 44#include <signal.h> 45#include <stdio.h> 46#include <stdlib.h> 47#include <unistd.h> 48 49#include <atf-c.h> 50 51#include "../../h_macros.h" 52 53#define NSIGNALS 5 54 55ATF_TC(sig); 56ATF_TC_HEAD(sig, tc) 57{ 58 atf_tc_set_md_var(tc, "descr", "Checks EVFILT_SIGNAL"); 59} 60ATF_TC_BODY(sig, tc) 61{ 62 struct timespec timeout; 63 struct kfilter_mapping km; 64 struct kevent event[1]; 65 char namebuf[32]; 66 pid_t pid, child; 67 int kq, n, num, status; 68 69 pid = getpid(); 70 (void)printf("my pid: %d\n", pid); 71 72 /* fork a child to send signals */ 73 RL(child = fork()); 74 if (child == 0) { 75 int i; 76 (void)sleep(2); 77 for(i = 0; i < NSIGNALS; ++i) { 78 (void)kill(pid, SIGUSR1); 79 (void)sleep(2); 80 } 81 _exit(0); 82 /* NOTREACHED */ 83 } 84 85 RL(kq = kqueue()); 86 87 (void)strlcpy(namebuf, "EVFILT_SIGNAL", sizeof(namebuf)); 88 km.name = namebuf; 89 RL(ioctl(kq, KFILTER_BYNAME, &km)); 90 (void)printf("got %d as filter number for `%s'.\n", km.filter, km.name); 91 92 /* ignore the signal to avoid taking it for real */ 93 REQUIRE_LIBC(signal(SIGUSR1, SIG_IGN), SIG_ERR); 94 95 event[0].ident = SIGUSR1; 96 event[0].filter = km.filter; 97 event[0].flags = EV_ADD | EV_ENABLE; 98 99 RL(kevent(kq, event, 1, NULL, 0, NULL)); 100 101 (void)sleep(1); 102 103 timeout.tv_sec = 1; 104 timeout.tv_nsec = 0; 105 106 for (num = 0; num < NSIGNALS; num += n) { 107 struct timeval then, now, diff; 108 109 RL(gettimeofday(&then, NULL)); 110 RL(n = kevent(kq, NULL, 0, event, 1, &timeout)); 111 RL(gettimeofday(&now, NULL)); 112 timersub(&now, &then, &diff); 113 114 (void)printf("sig: kevent returned %d in %lld.%06ld\n", 115 n, (long long)diff.tv_sec, (long)diff.tv_usec); 116 117 if (n == 0) 118 continue; 119 120 (void)printf("sig: kevent flags: 0x%x, data: %" PRId64 " (# " 121 "times signal posted)\n", event[0].flags, event[0].data); 122 } 123 124 (void)waitpid(child, &status, 0); 125 (void)printf("sig: finished successfully\n"); 126} 127 128ATF_TP_ADD_TCS(tp) 129{ 130 ATF_TP_ADD_TC(tp, sig); 131 132 return atf_no_error(); 133} 134