1 /*
2 * Copyright (C) 2015 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include "util.h"
18
19 #include <errno.h>
20 #include <fcntl.h>
21 #include <sys/stat.h>
22
23 #include <android-base/stringprintf.h>
24 #include <android-base/test_utils.h>
25 #include <gtest/gtest.h>
26
TEST(util,read_file_ENOENT)27 TEST(util, read_file_ENOENT) {
28 std::string s("hello");
29 errno = 0;
30 EXPECT_FALSE(read_file("/proc/does-not-exist", &s));
31 EXPECT_EQ(ENOENT, errno);
32 EXPECT_EQ("", s); // s was cleared.
33 }
34
TEST(util,read_file_group_writeable)35 TEST(util, read_file_group_writeable) {
36 std::string s("hello");
37 TemporaryFile tf;
38 ASSERT_TRUE(tf.fd != -1);
39 EXPECT_TRUE(write_file(tf.path, s)) << strerror(errno);
40 EXPECT_NE(-1, fchmodat(AT_FDCWD, tf.path, 0620, AT_SYMLINK_NOFOLLOW)) << strerror(errno);
41 EXPECT_FALSE(read_file(tf.path, &s)) << strerror(errno);
42 EXPECT_EQ("", s); // s was cleared.
43 }
44
TEST(util,read_file_world_writeable)45 TEST(util, read_file_world_writeable) {
46 std::string s("hello");
47 TemporaryFile tf;
48 ASSERT_TRUE(tf.fd != -1);
49 EXPECT_TRUE(write_file(tf.path, s.c_str())) << strerror(errno);
50 EXPECT_NE(-1, fchmodat(AT_FDCWD, tf.path, 0602, AT_SYMLINK_NOFOLLOW)) << strerror(errno);
51 EXPECT_FALSE(read_file(tf.path, &s)) << strerror(errno);
52 EXPECT_EQ("", s); // s was cleared.
53 }
54
TEST(util,read_file_symbolic_link)55 TEST(util, read_file_symbolic_link) {
56 std::string s("hello");
57 errno = 0;
58 // lrwxrwxrwx 1 root root 13 1970-01-01 00:00 charger -> /sbin/healthd
59 EXPECT_FALSE(read_file("/charger", &s));
60 EXPECT_EQ(ELOOP, errno);
61 EXPECT_EQ("", s); // s was cleared.
62 }
63
TEST(util,read_file_success)64 TEST(util, read_file_success) {
65 std::string s("hello");
66 EXPECT_TRUE(read_file("/proc/version", &s));
67 EXPECT_GT(s.length(), 6U);
68 EXPECT_EQ('\n', s[s.length() - 1]);
69 s[5] = 0;
70 EXPECT_STREQ("Linux", s.c_str());
71 }
72
TEST(util,write_file_binary)73 TEST(util, write_file_binary) {
74 std::string contents("abcd");
75 contents.push_back('\0');
76 contents.push_back('\0');
77 contents.append("dcba");
78 ASSERT_EQ(10u, contents.size());
79
80 TemporaryFile tf;
81 ASSERT_TRUE(tf.fd != -1);
82 EXPECT_TRUE(write_file(tf.path, contents)) << strerror(errno);
83
84 std::string read_back_contents;
85 EXPECT_TRUE(read_file(tf.path, &read_back_contents)) << strerror(errno);
86 EXPECT_EQ(contents, read_back_contents);
87 EXPECT_EQ(10u, read_back_contents.size());
88 }
89
TEST(util,write_file_not_exist)90 TEST(util, write_file_not_exist) {
91 std::string s("hello");
92 std::string s2("hello");
93 TemporaryDir test_dir;
94 std::string path = android::base::StringPrintf("%s/does-not-exist", test_dir.path);
95 EXPECT_TRUE(write_file(path, s));
96 EXPECT_TRUE(read_file(path, &s2));
97 EXPECT_EQ(s, s2);
98 struct stat sb;
99 int fd = open(path.c_str(), O_RDONLY | O_NOFOLLOW | O_CLOEXEC);
100 EXPECT_NE(-1, fd);
101 EXPECT_EQ(0, fstat(fd, &sb));
102 EXPECT_EQ((const unsigned int)(S_IRUSR | S_IWUSR), sb.st_mode & 0777);
103 EXPECT_EQ(0, unlink(path.c_str()));
104 }
105
TEST(util,write_file_exist)106 TEST(util, write_file_exist) {
107 std::string s2("");
108 TemporaryFile tf;
109 ASSERT_TRUE(tf.fd != -1);
110 EXPECT_TRUE(write_file(tf.path, "1hello1")) << strerror(errno);
111 EXPECT_TRUE(read_file(tf.path, &s2));
112 EXPECT_STREQ("1hello1", s2.c_str());
113 EXPECT_TRUE(write_file(tf.path, "2ll2"));
114 EXPECT_TRUE(read_file(tf.path, &s2));
115 EXPECT_STREQ("2ll2", s2.c_str());
116 }
117
TEST(util,decode_uid)118 TEST(util, decode_uid) {
119 EXPECT_EQ(0U, decode_uid("root"));
120 EXPECT_EQ(UINT_MAX, decode_uid("toot"));
121 EXPECT_EQ(123U, decode_uid("123"));
122 }
123