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
44#define DIR "dir"
45#define FILE "dir/readlinkat"
46#define BASEFILE "readlinkat"
47#define LINK "dir/symlink"
48#define BASELINK "symlink"
49#define FILEERR "dir/readlinkaterr"
50
51ATF_TC(readlinkat_fd);
52ATF_TC_HEAD(readlinkat_fd, tc)
53{
54	atf_tc_set_md_var(tc, "descr", "See that readlinkat works with fd");
55}
56ATF_TC_BODY(readlinkat_fd, tc)
57{
58	int dfd;
59	int fd;
60	ssize_t len;
61	char buf[MAXPATHLEN];
62
63	ATF_REQUIRE(mkdir(DIR, 0755) == 0);
64	ATF_REQUIRE((fd = open(FILE, O_CREAT|O_RDWR, 0644)) != -1);
65	ATF_REQUIRE(close(fd) == 0);
66	ATF_REQUIRE(symlink(FILE, LINK) == 0);
67
68	ATF_REQUIRE((dfd = open(DIR, O_RDONLY, 0)) != -1);
69	len = readlinkat(dfd, BASELINK, buf, sizeof(buf)-1);
70	ATF_REQUIRE(len != -1);
71	buf[len] = 0;
72	ATF_REQUIRE(close(dfd) == 0);
73
74	ATF_REQUIRE(strcmp(buf, FILE) == 0);
75}
76
77ATF_TC(readlinkat_fdcwd);
78ATF_TC_HEAD(readlinkat_fdcwd, tc)
79{
80	atf_tc_set_md_var(tc, "descr",
81			  "See that readlinkat works with fd as AT_FDCWD");
82}
83ATF_TC_BODY(readlinkat_fdcwd, tc)
84{
85	int fd;
86	ssize_t len;
87	char buf[MAXPATHLEN];
88
89	ATF_REQUIRE(mkdir(DIR, 0755) == 0);
90	ATF_REQUIRE((fd = open(FILE, O_CREAT|O_RDWR, 0644)) != -1);
91	ATF_REQUIRE(close(fd) == 0);
92	ATF_REQUIRE(symlink(FILE, LINK) == 0);
93
94	len = readlinkat(AT_FDCWD, LINK, buf, sizeof(buf)-1);
95	ATF_REQUIRE(len != -1);
96	buf[len] = 0;
97
98	ATF_REQUIRE(strcmp(buf, FILE) == 0);
99}
100
101ATF_TC(readlinkat_fdcwderr);
102ATF_TC_HEAD(readlinkat_fdcwderr, tc)
103{
104	atf_tc_set_md_var(tc, "descr",
105		  "See that readlinkat fails with fd as AT_FDCWD and bad path");
106}
107ATF_TC_BODY(readlinkat_fdcwderr, tc)
108{
109	char buf[MAXPATHLEN];
110
111	ATF_REQUIRE(readlinkat(AT_FDCWD, LINK, buf, sizeof(buf)) == -1);
112}
113
114ATF_TC(readlinkat_fderr1);
115ATF_TC_HEAD(readlinkat_fderr1, tc)
116{
117	atf_tc_set_md_var(tc, "descr", "See that readlinkat fail with bad path");
118}
119ATF_TC_BODY(readlinkat_fderr1, tc)
120{
121	int dfd;
122
123	ATF_REQUIRE(mkdir(DIR, 0755) == 0);
124	ATF_REQUIRE((dfd = open(DIR, O_RDONLY, 0)) != -1);
125	ATF_REQUIRE(readlinkat(dfd, FILEERR, F_OK, 0) == -1);
126	ATF_REQUIRE(close(dfd) == 0);
127}
128
129ATF_TC(readlinkat_fderr2);
130ATF_TC_HEAD(readlinkat_fderr2, tc)
131{
132	atf_tc_set_md_var(tc, "descr", "See that readlinkat fails with fd as -1");
133}
134ATF_TC_BODY(readlinkat_fderr2, tc)
135{
136	int fd;
137	char buf[MAXPATHLEN];
138
139	ATF_REQUIRE(mkdir(DIR, 0755) == 0);
140	ATF_REQUIRE((fd = open(FILE, O_CREAT|O_RDWR, 0644)) != -1);
141	ATF_REQUIRE(close(fd) == 0);
142	ATF_REQUIRE(symlink(FILE, LINK) == 0);
143
144	ATF_REQUIRE(readlinkat(-1, LINK, buf, sizeof(buf)) == -1);
145}
146
147ATF_TP_ADD_TCS(tp)
148{
149
150	ATF_TP_ADD_TC(tp, readlinkat_fd);
151	ATF_TP_ADD_TC(tp, readlinkat_fdcwd);
152	ATF_TP_ADD_TC(tp, readlinkat_fdcwderr);
153	ATF_TP_ADD_TC(tp, readlinkat_fderr1);
154	ATF_TP_ADD_TC(tp, readlinkat_fderr2);
155
156	return atf_no_error();
157}
158