1/*	$NetBSD: t_readlinkat.c,v 1.4 2017/01/10 15:13:56 christos 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 1.4 2017/01/10 15:13:56 christos Exp $");
33
34#include <sys/param.h>
35#include <sys/stat.h>
36#include <atf-c.h>
37#include <errno.h>
38#include <fcntl.h>
39#include <limits.h>
40#include <paths.h>
41#include <stdio.h>
42#include <string.h>
43#include <unistd.h>
44
45#define DIR "dir"
46#define FILE "dir/readlinkat"
47#define BASEFILE "readlinkat"
48#define LINK "dir/symlink"
49#define BASELINK "symlink"
50#define FILEERR "dir/readlinkaterr"
51
52ATF_TC(readlinkat_fd);
53ATF_TC_HEAD(readlinkat_fd, tc)
54{
55	atf_tc_set_md_var(tc, "descr", "See that readlinkat works with fd");
56}
57ATF_TC_BODY(readlinkat_fd, tc)
58{
59	int dfd;
60	int fd;
61	ssize_t len;
62	char buf[MAXPATHLEN];
63
64	ATF_REQUIRE(mkdir(DIR, 0755) == 0);
65	ATF_REQUIRE((fd = open(FILE, O_CREAT|O_RDWR, 0644)) != -1);
66	ATF_REQUIRE(close(fd) == 0);
67	ATF_REQUIRE(symlink(FILE, LINK) == 0);
68
69	ATF_REQUIRE((dfd = open(DIR, O_RDONLY, 0)) != -1);
70	len = readlinkat(dfd, BASELINK, buf, sizeof(buf)-1);
71	ATF_REQUIRE(len != -1);
72	buf[len] = 0;
73	ATF_REQUIRE(close(dfd) == 0);
74
75	ATF_REQUIRE(strcmp(buf, FILE) == 0);
76}
77
78ATF_TC(readlinkat_fdcwd);
79ATF_TC_HEAD(readlinkat_fdcwd, tc)
80{
81	atf_tc_set_md_var(tc, "descr",
82			  "See that readlinkat works with fd as AT_FDCWD");
83}
84ATF_TC_BODY(readlinkat_fdcwd, tc)
85{
86	int fd;
87	ssize_t len;
88	char buf[MAXPATHLEN];
89
90	ATF_REQUIRE(mkdir(DIR, 0755) == 0);
91	ATF_REQUIRE((fd = open(FILE, O_CREAT|O_RDWR, 0644)) != -1);
92	ATF_REQUIRE(close(fd) == 0);
93	ATF_REQUIRE(symlink(FILE, LINK) == 0);
94
95	len = readlinkat(AT_FDCWD, LINK, buf, sizeof(buf)-1);
96	ATF_REQUIRE(len != -1);
97	buf[len] = 0;
98
99	ATF_REQUIRE(strcmp(buf, FILE) == 0);
100}
101
102ATF_TC(readlinkat_fdcwderr);
103ATF_TC_HEAD(readlinkat_fdcwderr, tc)
104{
105	atf_tc_set_md_var(tc, "descr",
106		  "See that readlinkat fails with fd as AT_FDCWD and bad path");
107}
108ATF_TC_BODY(readlinkat_fdcwderr, tc)
109{
110	char buf[MAXPATHLEN];
111
112	ATF_REQUIRE(readlinkat(AT_FDCWD, LINK, buf, sizeof(buf)) == -1);
113}
114
115ATF_TC(readlinkat_fderr1);
116ATF_TC_HEAD(readlinkat_fderr1, tc)
117{
118	atf_tc_set_md_var(tc, "descr", "See that readlinkat fail with bad path");
119}
120ATF_TC_BODY(readlinkat_fderr1, tc)
121{
122	int dfd;
123
124	ATF_REQUIRE(mkdir(DIR, 0755) == 0);
125	ATF_REQUIRE((dfd = open(DIR, O_RDONLY, 0)) != -1);
126	ATF_REQUIRE(readlinkat(dfd, FILEERR, F_OK, 0) == -1);
127	ATF_REQUIRE(close(dfd) == 0);
128}
129
130ATF_TC(readlinkat_fderr2);
131ATF_TC_HEAD(readlinkat_fderr2, tc)
132{
133	atf_tc_set_md_var(tc, "descr", "See that readlinkat fails with fd as -1");
134}
135ATF_TC_BODY(readlinkat_fderr2, tc)
136{
137	int fd;
138	char buf[MAXPATHLEN];
139
140	ATF_REQUIRE(mkdir(DIR, 0755) == 0);
141	ATF_REQUIRE((fd = open(FILE, O_CREAT|O_RDWR, 0644)) != -1);
142	ATF_REQUIRE(close(fd) == 0);
143	ATF_REQUIRE(symlink(FILE, LINK) == 0);
144
145	ATF_REQUIRE(readlinkat(-1, LINK, buf, sizeof(buf)) == -1);
146}
147
148ATF_TP_ADD_TCS(tp)
149{
150
151	ATF_TP_ADD_TC(tp, readlinkat_fd);
152	ATF_TP_ADD_TC(tp, readlinkat_fdcwd);
153	ATF_TP_ADD_TC(tp, readlinkat_fdcwderr);
154	ATF_TP_ADD_TC(tp, readlinkat_fderr1);
155	ATF_TP_ADD_TC(tp, readlinkat_fderr2);
156
157	return atf_no_error();
158}
159