Elliott Hughes | 063cfb2 | 2012-10-25 20:55:23 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2012 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 <gtest/gtest.h> |
| 18 | |
| 19 | #include <dirent.h> |
| 20 | #include <errno.h> |
| 21 | #include <fcntl.h> |
| 22 | #include <limits.h> |
| 23 | #include <sys/stat.h> |
| 24 | #include <sys/types.h> |
| 25 | #include <unistd.h> |
| 26 | |
| 27 | #include <algorithm> |
| 28 | #include <set> |
| 29 | #include <string> |
| 30 | |
Elliott Hughes | 063cfb2 | 2012-10-25 20:55:23 -0700 | [diff] [blame] | 31 | static void CheckProcSelf(std::set<std::string>& names) { |
| 32 | // We have a good idea of what should be in /proc/self. |
| 33 | ASSERT_TRUE(names.find(".") != names.end()); |
| 34 | ASSERT_TRUE(names.find("..") != names.end()); |
| 35 | ASSERT_TRUE(names.find("cmdline") != names.end()); |
| 36 | ASSERT_TRUE(names.find("fd") != names.end()); |
| 37 | ASSERT_TRUE(names.find("stat") != names.end()); |
| 38 | } |
| 39 | |
| 40 | TEST(dirent, scandir) { |
| 41 | // Get everything from /proc/self... |
| 42 | dirent** entries; |
Elliott Hughes | 063cfb2 | 2012-10-25 20:55:23 -0700 | [diff] [blame] | 43 | int entry_count = scandir("/proc/self", &entries, NULL, alphasort); |
Elliott Hughes | 063cfb2 | 2012-10-25 20:55:23 -0700 | [diff] [blame] | 44 | ASSERT_GE(entry_count, 0); |
| 45 | |
| 46 | // Turn the directory entries into a set and vector of the names. |
| 47 | std::set<std::string> name_set; |
| 48 | std::vector<std::string> unsorted_name_list; |
| 49 | for (size_t i = 0; i < static_cast<size_t>(entry_count); ++i) { |
| 50 | name_set.insert(entries[i]->d_name); |
| 51 | unsorted_name_list.push_back(entries[i]->d_name); |
| 52 | free(entries[i]); |
| 53 | } |
| 54 | free(entries); |
| 55 | |
| 56 | // No duplicates. |
| 57 | ASSERT_EQ(name_set.size(), unsorted_name_list.size()); |
| 58 | |
| 59 | // All entries sorted. |
| 60 | std::vector<std::string> sorted_name_list(unsorted_name_list); |
| 61 | std::sort(sorted_name_list.begin(), sorted_name_list.end()); |
| 62 | ASSERT_EQ(sorted_name_list, unsorted_name_list); |
| 63 | |
| 64 | CheckProcSelf(name_set); |
| 65 | } |
| 66 | |
| 67 | TEST(dirent, fdopendir_invalid) { |
| 68 | ASSERT_TRUE(fdopendir(-1) == NULL); |
Elliott Hughes | 5e3fc43 | 2013-02-11 16:36:48 -0800 | [diff] [blame] | 69 | ASSERT_EQ(EBADF, errno); |
Elliott Hughes | 063cfb2 | 2012-10-25 20:55:23 -0700 | [diff] [blame] | 70 | |
| 71 | int fd = open("/dev/null", O_RDONLY); |
| 72 | ASSERT_NE(fd, -1); |
| 73 | ASSERT_TRUE(fdopendir(fd) == NULL); |
Elliott Hughes | 5e3fc43 | 2013-02-11 16:36:48 -0800 | [diff] [blame] | 74 | ASSERT_EQ(ENOTDIR, errno); |
Elliott Hughes | 063cfb2 | 2012-10-25 20:55:23 -0700 | [diff] [blame] | 75 | close(fd); |
| 76 | } |
| 77 | |
| 78 | TEST(dirent, fdopendir) { |
| 79 | int fd = open("/proc/self", O_RDONLY); |
| 80 | DIR* d = fdopendir(fd); |
| 81 | ASSERT_TRUE(d != NULL); |
| 82 | dirent* e = readdir(d); |
| 83 | ASSERT_STREQ(e->d_name, "."); |
| 84 | ASSERT_EQ(closedir(d), 0); |
| 85 | |
| 86 | // fdopendir(3) took ownership, so closedir(3) closed our fd. |
| 87 | ASSERT_EQ(close(fd), -1); |
Elliott Hughes | 5e3fc43 | 2013-02-11 16:36:48 -0800 | [diff] [blame] | 88 | ASSERT_EQ(EBADF, errno); |
Elliott Hughes | 063cfb2 | 2012-10-25 20:55:23 -0700 | [diff] [blame] | 89 | } |
| 90 | |
| 91 | TEST(dirent, opendir_invalid) { |
| 92 | ASSERT_TRUE(opendir("/does/not/exist") == NULL); |
Elliott Hughes | 5e3fc43 | 2013-02-11 16:36:48 -0800 | [diff] [blame] | 93 | ASSERT_EQ(ENOENT, errno); |
Elliott Hughes | 063cfb2 | 2012-10-25 20:55:23 -0700 | [diff] [blame] | 94 | |
| 95 | ASSERT_TRUE(opendir("/dev/null") == NULL); |
Elliott Hughes | 5e3fc43 | 2013-02-11 16:36:48 -0800 | [diff] [blame] | 96 | ASSERT_EQ(ENOTDIR, errno); |
Elliott Hughes | 063cfb2 | 2012-10-25 20:55:23 -0700 | [diff] [blame] | 97 | } |
| 98 | |
| 99 | TEST(dirent, opendir) { |
| 100 | DIR* d = opendir("/proc/self"); |
| 101 | ASSERT_TRUE(d != NULL); |
| 102 | dirent* e = readdir(d); |
| 103 | ASSERT_STREQ(e->d_name, "."); |
| 104 | ASSERT_EQ(closedir(d), 0); |
| 105 | } |
| 106 | |
| 107 | TEST(dirent, closedir_invalid) { |
| 108 | DIR* d = NULL; |
| 109 | ASSERT_EQ(closedir(d), -1); |
Elliott Hughes | 5e3fc43 | 2013-02-11 16:36:48 -0800 | [diff] [blame] | 110 | ASSERT_EQ(EINVAL, errno); |
Elliott Hughes | 063cfb2 | 2012-10-25 20:55:23 -0700 | [diff] [blame] | 111 | } |
| 112 | |
| 113 | TEST(dirent, closedir) { |
| 114 | DIR* d = opendir("/proc/self"); |
| 115 | ASSERT_TRUE(d != NULL); |
| 116 | ASSERT_EQ(closedir(d), 0); |
| 117 | } |
| 118 | |
| 119 | TEST(dirent, readdir) { |
| 120 | DIR* d = opendir("/proc/self"); |
| 121 | ASSERT_TRUE(d != NULL); |
| 122 | std::set<std::string> name_set; |
| 123 | errno = 0; |
| 124 | dirent* e; |
| 125 | while ((e = readdir(d)) != NULL) { |
| 126 | name_set.insert(e->d_name); |
| 127 | } |
| 128 | // Reading to the end of the directory is not an error. |
| 129 | // readdir(3) returns NULL, but leaves errno as 0. |
Elliott Hughes | 5e3fc43 | 2013-02-11 16:36:48 -0800 | [diff] [blame] | 130 | ASSERT_EQ(0, errno); |
Elliott Hughes | 063cfb2 | 2012-10-25 20:55:23 -0700 | [diff] [blame] | 131 | ASSERT_EQ(closedir(d), 0); |
| 132 | |
| 133 | CheckProcSelf(name_set); |
| 134 | } |
| 135 | |
| 136 | TEST(dirent, readdir_r) { |
| 137 | DIR* d = opendir("/proc/self"); |
| 138 | ASSERT_TRUE(d != NULL); |
| 139 | std::set<std::string> name_set; |
| 140 | errno = 0; |
| 141 | dirent storage; |
| 142 | dirent* e = NULL; |
| 143 | while (readdir_r(d, &storage, &e) == 0 && e != NULL) { |
| 144 | name_set.insert(e->d_name); |
| 145 | } |
| 146 | // Reading to the end of the directory is not an error. |
| 147 | // readdir_r(3) returns NULL, but leaves errno as 0. |
Elliott Hughes | 5e3fc43 | 2013-02-11 16:36:48 -0800 | [diff] [blame] | 148 | ASSERT_EQ(0, errno); |
Elliott Hughes | 063cfb2 | 2012-10-25 20:55:23 -0700 | [diff] [blame] | 149 | ASSERT_EQ(closedir(d), 0); |
| 150 | |
| 151 | CheckProcSelf(name_set); |
| 152 | } |
| 153 | |
| 154 | TEST(dirent, rewinddir) { |
| 155 | DIR* d = opendir("/proc/self"); |
| 156 | ASSERT_TRUE(d != NULL); |
| 157 | |
| 158 | // Get all the names once... |
| 159 | std::vector<std::string> pass1; |
| 160 | dirent* e; |
| 161 | while ((e = readdir(d)) != NULL) { |
| 162 | pass1.push_back(e->d_name); |
| 163 | } |
| 164 | |
| 165 | // ...rewind... |
| 166 | rewinddir(d); |
| 167 | |
| 168 | // ...and get all the names again. |
| 169 | std::vector<std::string> pass2; |
| 170 | while ((e = readdir(d)) != NULL) { |
| 171 | pass2.push_back(e->d_name); |
| 172 | } |
| 173 | |
| 174 | ASSERT_EQ(closedir(d), 0); |
| 175 | |
| 176 | // We should have seen the same names in the same order both times. |
| 177 | ASSERT_EQ(pass1.size(), pass2.size()); |
| 178 | for (size_t i = 0; i < pass1.size(); ++i) { |
| 179 | ASSERT_EQ(pass1[i], pass2[i]); |
| 180 | } |
| 181 | } |