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 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 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 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 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 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 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 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 } 105 106 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 } 117 118 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
