t_sig.c revision 313508 
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#ifdef __FreeBSD__
38#include <sys/types.h>
39#endif
40#include <sys/event.h>
41#include <sys/ioctl.h>
42#include <sys/param.h>
43#include <sys/time.h>
44#include <sys/wait.h>
45
46#include <inttypes.h>
47#include <signal.h>
48#include <stdio.h>
49#include <stdlib.h>
50#include <unistd.h>
51
52#include <atf-c.h>
53
54#include "../../h_macros.h"
55
56#define NSIGNALS 5
57
58ATF_TC(sig);
59ATF_TC_HEAD(sig, tc)
60{
61	atf_tc_set_md_var(tc, "descr", "Checks EVFILT_SIGNAL");
62}
63ATF_TC_BODY(sig, tc)
64{
65	struct timespec	timeout;
66#ifdef __NetBSD__
67	struct kfilter_mapping km;
68#endif
69	struct kevent event[1];
70#ifdef __NetBSD__
71	char namebuf[32];
72#endif
73	pid_t pid, child;
74	int kq, n, num, status;
75
76	pid = getpid();
77	(void)printf("my pid: %d\n", pid);
78
79	/* fork a child to send signals */
80	RL(child = fork());
81	if (child == 0) {
82		int i;
83		(void)sleep(2);
84		for(i = 0; i < NSIGNALS; ++i) {
85			(void)kill(pid, SIGUSR1);
86			(void)sleep(2);
87		}
88		_exit(0);
89		/* NOTREACHED */
90	}
91
92	RL(kq = kqueue());
93
94#ifdef __NetBSD__
95	(void)strlcpy(namebuf, "EVFILT_SIGNAL", sizeof(namebuf));
96	km.name = namebuf;
97	RL(ioctl(kq, KFILTER_BYNAME, &km));
98	(void)printf("got %d as filter number for `%s'.\n", km.filter, km.name);
99#endif
100
101	/* ignore the signal to avoid taking it for real */
102	REQUIRE_LIBC(signal(SIGUSR1, SIG_IGN), SIG_ERR);
103
104	event[0].ident = SIGUSR1;
105#ifdef __NetBSD__
106	event[0].filter = km.filter;
107#else
108	event[0].filter = EVFILT_SIGNAL;
109#endif
110	event[0].flags = EV_ADD | EV_ENABLE;
111
112	RL(kevent(kq, event, 1, NULL, 0, NULL));
113
114	(void)sleep(1);
115
116	timeout.tv_sec = 1;
117	timeout.tv_nsec = 0;
118
119	for (num = 0; num < NSIGNALS; num += n) {
120		struct timeval then, now, diff;
121
122		RL(gettimeofday(&then, NULL));
123		RL(n = kevent(kq, NULL, 0, event, 1, &timeout));
124		RL(gettimeofday(&now, NULL));
125		timersub(&now, &then, &diff);
126
127		(void)printf("sig: kevent returned %d in %lld.%06ld\n",
128		    n, (long long)diff.tv_sec, (long)diff.tv_usec);
129
130		if (n == 0)
131			continue;
132
133#ifdef __FreeBSD__
134		(void)printf("sig: kevent flags: 0x%x, data: %" PRIdPTR " (# "
135#else
136		(void)printf("sig: kevent flags: 0x%x, data: %" PRId64 " (# "
137#endif
138		    "times signal posted)\n", event[0].flags, event[0].data);
139	}
140
141	(void)waitpid(child, &status, 0);
142	(void)printf("sig: finished successfully\n");
143}
144
145ATF_TP_ADD_TCS(tp)
146{
147	ATF_TP_ADD_TC(tp, sig);
148
149	return atf_no_error();
150}
151