t_closefrom.c revision 1.2 
1/* $NetBSD: t_closefrom.c,v 1.2 2011/05/09 10:50:02 jruoho Exp $ */
2
3/*-
4 * Copyright (c) 2011 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Jukka Ruohonen.
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#include <sys/cdefs.h>
32__RCSID("$NetBSD: t_closefrom.c,v 1.2 2011/05/09 10:50:02 jruoho Exp $");
33
34#include <atf-c.h>
35#include <errno.h>
36#include <fcntl.h>
37#include <limits.h>
38#include <unistd.h>
39
40static const char  path[] = "closefrom";
41
42ATF_TC_WITH_CLEANUP(closefrom_basic);
43ATF_TC_HEAD(closefrom_basic, tc)
44{
45	atf_tc_set_md_var(tc, "descr", "A basic test of closefrom(3), #1");
46}
47
48ATF_TC_BODY(closefrom_basic, tc)
49{
50	int fd, cur1, cur2;
51
52	fd = open(path, O_RDONLY | O_CREAT, 0400);
53	ATF_REQUIRE(fd >= 0);
54
55	cur1 = fcntl(0, F_MAXFD);
56
57	ATF_REQUIRE(cur1 > 0);
58	ATF_REQUIRE(closefrom(cur1) == 0);
59
60	cur2 = fcntl(0, F_MAXFD);
61
62	ATF_REQUIRE(cur2 >= 0);
63	ATF_REQUIRE(cur1 - 1 == cur2);
64	ATF_REQUIRE(unlink(path) == 0);
65}
66
67ATF_TC_CLEANUP(closefrom_basic, tc)
68{
69	(void)unlink(path);
70}
71
72ATF_TC_WITH_CLEANUP(closefrom_buffer);
73ATF_TC_HEAD(closefrom_buffer, tc)
74{
75	atf_tc_set_md_var(tc, "descr", "A basic test of closefrom(3), #2");
76}
77
78ATF_TC_BODY(closefrom_buffer, tc)
79{
80	int buf[16], cur, half;
81	size_t i;
82
83	/*
84	 * Open a buffer of descriptors, close the half of
85	 * these and verify that the result is consistent.
86	 */
87	ATF_REQUIRE(closefrom(STDERR_FILENO + 1) == 0);
88
89	cur = fcntl(0, F_MAXFD);
90	ATF_REQUIRE(cur == STDERR_FILENO);
91
92	for (i = 0; i < __arraycount(buf); i++) {
93		buf[i] = open(path, O_RDWR | O_CREAT, 0600);
94		ATF_REQUIRE(buf[i] >= 0);
95	}
96
97	cur = fcntl(0, F_MAXFD);
98	ATF_REQUIRE(cur == __arraycount(buf) + STDERR_FILENO);
99
100	half = STDERR_FILENO + __arraycount(buf) / 2;
101	ATF_REQUIRE(closefrom(half) == 0);
102
103	cur = fcntl(0, F_MAXFD);
104	ATF_REQUIRE(cur == half - 1);
105
106	for (i = 0; i < __arraycount(buf); i++)
107		(void)close(buf[i]);
108}
109
110ATF_TC_CLEANUP(closefrom_buffer, tc)
111{
112	(void)unlink(path);
113}
114
115ATF_TC(closefrom_err);
116ATF_TC_HEAD(closefrom_err, tc)
117{
118	atf_tc_set_md_var(tc, "descr", "Test errors from closefrom(3)");
119}
120
121ATF_TC_BODY(closefrom_err, tc)
122{
123
124	errno = 0;
125	ATF_REQUIRE_ERRNO(EBADF, closefrom(-INT_MAX) == -1);
126}
127
128ATF_TP_ADD_TCS(tp)
129{
130
131	ATF_TP_ADD_TC(tp, closefrom_basic);
132	ATF_TP_ADD_TC(tp, closefrom_buffer);
133	ATF_TP_ADD_TC(tp, closefrom_err);
134
135	return atf_no_error();
136}
137