t_readlinkat.c revision 291870 
1/*	$NetBSD: t_readlinkat.c,v 1.3 2013/03/17 04:46:06 jmmv Exp $ */
2
3/*-
4 * Copyright (c) 2012 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Emmanuel Dreyfus.
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_readlinkat.c,v 1.3 2013/03/17 04:46:06 jmmv Exp $");
33
34#include <atf-c.h>
35#include <errno.h>
36#include <fcntl.h>
37#include <limits.h>
38#include <paths.h>
39#include <stdio.h>
40#include <string.h>
41#include <unistd.h>
42#include <sys/param.h>
43#ifdef __FreeBSD__
44#include <sys/stat.h>
45#endif
46
47#define DIR "dir"
48#define FILE "dir/readlinkat"
49#define BASEFILE "readlinkat"
50#define LINK "dir/symlink"
51#define BASELINK "symlink"
52#define FILEERR "dir/readlinkaterr"
53
54ATF_TC(readlinkat_fd);
55ATF_TC_HEAD(readlinkat_fd, tc)
56{
57	atf_tc_set_md_var(tc, "descr", "See that readlinkat works with fd");
58}
59ATF_TC_BODY(readlinkat_fd, tc)
60{
61	int dfd;
62	int fd;
63	ssize_t len;
64	char buf[MAXPATHLEN];
65
66	ATF_REQUIRE(mkdir(DIR, 0755) == 0);
67	ATF_REQUIRE((fd = open(FILE, O_CREAT|O_RDWR, 0644)) != -1);
68	ATF_REQUIRE(close(fd) == 0);
69	ATF_REQUIRE(symlink(FILE, LINK) == 0);
70
71	ATF_REQUIRE((dfd = open(DIR, O_RDONLY, 0)) != -1);
72	len = readlinkat(dfd, BASELINK, buf, sizeof(buf)-1);
73	ATF_REQUIRE(len != -1);
74	buf[len] = 0;
75	ATF_REQUIRE(close(dfd) == 0);
76
77	ATF_REQUIRE(strcmp(buf, FILE) == 0);
78}
79
80ATF_TC(readlinkat_fdcwd);
81ATF_TC_HEAD(readlinkat_fdcwd, tc)
82{
83	atf_tc_set_md_var(tc, "descr",
84			  "See that readlinkat works with fd as AT_FDCWD");
85}
86ATF_TC_BODY(readlinkat_fdcwd, tc)
87{
88	int fd;
89	ssize_t len;
90	char buf[MAXPATHLEN];
91
92	ATF_REQUIRE(mkdir(DIR, 0755) == 0);
93	ATF_REQUIRE((fd = open(FILE, O_CREAT|O_RDWR, 0644)) != -1);
94	ATF_REQUIRE(close(fd) == 0);
95	ATF_REQUIRE(symlink(FILE, LINK) == 0);
96
97	len = readlinkat(AT_FDCWD, LINK, buf, sizeof(buf)-1);
98	ATF_REQUIRE(len != -1);
99	buf[len] = 0;
100
101	ATF_REQUIRE(strcmp(buf, FILE) == 0);
102}
103
104ATF_TC(readlinkat_fdcwderr);
105ATF_TC_HEAD(readlinkat_fdcwderr, tc)
106{
107	atf_tc_set_md_var(tc, "descr",
108		  "See that readlinkat fails with fd as AT_FDCWD and bad path");
109}
110ATF_TC_BODY(readlinkat_fdcwderr, tc)
111{
112	char buf[MAXPATHLEN];
113
114	ATF_REQUIRE(readlinkat(AT_FDCWD, LINK, buf, sizeof(buf)) == -1);
115}
116
117ATF_TC(readlinkat_fderr1);
118ATF_TC_HEAD(readlinkat_fderr1, tc)
119{
120	atf_tc_set_md_var(tc, "descr", "See that readlinkat fail with bad path");
121}
122ATF_TC_BODY(readlinkat_fderr1, tc)
123{
124	int dfd;
125
126	ATF_REQUIRE(mkdir(DIR, 0755) == 0);
127	ATF_REQUIRE((dfd = open(DIR, O_RDONLY, 0)) != -1);
128	ATF_REQUIRE(readlinkat(dfd, FILEERR, F_OK, 0) == -1);
129	ATF_REQUIRE(close(dfd) == 0);
130}
131
132ATF_TC(readlinkat_fderr2);
133ATF_TC_HEAD(readlinkat_fderr2, tc)
134{
135	atf_tc_set_md_var(tc, "descr", "See that readlinkat fails with fd as -1");
136}
137ATF_TC_BODY(readlinkat_fderr2, tc)
138{
139	int fd;
140	char buf[MAXPATHLEN];
141
142	ATF_REQUIRE(mkdir(DIR, 0755) == 0);
143	ATF_REQUIRE((fd = open(FILE, O_CREAT|O_RDWR, 0644)) != -1);
144	ATF_REQUIRE(close(fd) == 0);
145	ATF_REQUIRE(symlink(FILE, LINK) == 0);
146
147	ATF_REQUIRE(readlinkat(-1, LINK, buf, sizeof(buf)) == -1);
148}
149
150ATF_TP_ADD_TCS(tp)
151{
152
153	ATF_TP_ADD_TC(tp, readlinkat_fd);
154	ATF_TP_ADD_TC(tp, readlinkat_fdcwd);
155	ATF_TP_ADD_TC(tp, readlinkat_fdcwderr);
156	ATF_TP_ADD_TC(tp, readlinkat_fderr1);
157	ATF_TP_ADD_TC(tp, readlinkat_fderr2);
158
159	return atf_no_error();
160}
161