xref: /freebsd/contrib/netbsd-tests/kernel/kqueue/read/t_file2.c (revision 0e97acdf58fe27b09c4824a474b0344daf997c5f)
1 /* $NetBSD: t_file2.c,v 1.3 2010/11/07 17:51:20 jmmv 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 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_file2.c,v 1.3 2010/11/07 17:51:20 jmmv Exp $");
36 
37 #include <sys/event.h>
38 
39 #include <fcntl.h>
40 #include <unistd.h>
41 
42 #include <atf-c.h>
43 
44 #include "../../../h_macros.h"
45 
46 ATF_TC(file2);
47 ATF_TC_HEAD(file2, tc)
48 {
49 	atf_tc_set_md_var(tc, "descr",
50 	    "Checks EVFILT_READ for regular files. This test used to "
51 	    "trigger deadlock caused by problem fixed in revision 1.79.2.10 "
52 	    "of sys/kern/kern_descrip.c");
53 }
54 ATF_TC_BODY(file2, tc)
55 {
56 	int fd1, fd2, kq;
57 	struct kevent event[1];
58 
59 	RL(fd1 = open("afile", O_RDONLY|O_CREAT, 0644));
60 	RL(fd2 = open("bfile", O_RDONLY|O_CREAT, 0644));
61 
62 #if 1		/* XXX: why was this disabled? */
63 	RL(lseek(fd1, 0, SEEK_END));
64 #endif
65 
66 	RL(kq = kqueue());
67 
68 	EV_SET(&event[0], fd1, EVFILT_READ, EV_ADD|EV_ENABLE, 0, 0, 0);
69 	RL(kevent(kq, event, 1, NULL, 0, NULL));
70 
71 	RL(dup2(fd2, fd1));
72 }
73 
74 ATF_TP_ADD_TCS(tp)
75 {
76 	ATF_TP_ADD_TC(tp, file2);
77 
78 	return atf_no_error();
79 }
80