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/*
* Copyright (C) 2015 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "util.h"
#include <errno.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <android-base/stringprintf.h>
#include <android-base/test_utils.h>
#include <gtest/gtest.h>
using namespace std::literals::string_literals;
namespace android {
namespace init {
TEST(util, ReadFile_ENOENT) {
std::string s("hello");
std::string err;
errno = 0;
EXPECT_FALSE(ReadFile("/proc/does-not-exist", &s, &err));
EXPECT_EQ("Unable to open '/proc/does-not-exist': No such file or directory", err);
EXPECT_EQ(ENOENT, errno);
EXPECT_EQ("", s); // s was cleared.
}
TEST(util, ReadFileGroupWriteable) {
std::string s("hello");
TemporaryFile tf;
std::string err;
ASSERT_TRUE(tf.fd != -1);
EXPECT_TRUE(WriteFile(tf.path, s, &err)) << strerror(errno);
EXPECT_EQ("", err);
EXPECT_NE(-1, fchmodat(AT_FDCWD, tf.path, 0620, AT_SYMLINK_NOFOLLOW)) << strerror(errno);
EXPECT_FALSE(ReadFile(tf.path, &s, &err)) << strerror(errno);
EXPECT_EQ("Skipping insecure file '"s + tf.path + "'", err);
EXPECT_EQ("", s); // s was cleared.
}
TEST(util, ReadFileWorldWiteable) {
std::string s("hello");
TemporaryFile tf;
std::string err;
ASSERT_TRUE(tf.fd != -1);
EXPECT_TRUE(WriteFile(tf.path, s, &err)) << strerror(errno);
EXPECT_EQ("", err);
EXPECT_NE(-1, fchmodat(AT_FDCWD, tf.path, 0602, AT_SYMLINK_NOFOLLOW)) << strerror(errno);
EXPECT_FALSE(ReadFile(tf.path, &s, &err)) << strerror(errno);
EXPECT_EQ("Skipping insecure file '"s + tf.path + "'", err);
EXPECT_EQ("", s); // s was cleared.
}
TEST(util, ReadFileSymbolicLink) {
std::string s("hello");
errno = 0;
// lrwxrwxrwx 1 root root 13 1970-01-01 00:00 charger -> /sbin/healthd
std::string err;
EXPECT_FALSE(ReadFile("/charger", &s, &err));
EXPECT_EQ("Unable to open '/charger': Too many symbolic links encountered", err);
EXPECT_EQ(ELOOP, errno);
EXPECT_EQ("", s); // s was cleared.
}
TEST(util, ReadFileSuccess) {
std::string s("hello");
std::string err;
EXPECT_TRUE(ReadFile("/proc/version", &s, &err));
EXPECT_EQ("", err);
EXPECT_GT(s.length(), 6U);
EXPECT_EQ('\n', s[s.length() - 1]);
s[5] = 0;
EXPECT_STREQ("Linux", s.c_str());
}
TEST(util, WriteFileBinary) {
std::string contents("abcd");
contents.push_back('\0');
contents.push_back('\0');
contents.append("dcba");
ASSERT_EQ(10u, contents.size());
TemporaryFile tf;
std::string err;
ASSERT_TRUE(tf.fd != -1);
EXPECT_TRUE(WriteFile(tf.path, contents, &err)) << strerror(errno);
EXPECT_EQ("", err);
std::string read_back_contents;
EXPECT_TRUE(ReadFile(tf.path, &read_back_contents, &err)) << strerror(errno);
EXPECT_EQ("", err);
EXPECT_EQ(contents, read_back_contents);
EXPECT_EQ(10u, read_back_contents.size());
}
TEST(util, WriteFileNotExist) {
std::string s("hello");
std::string s2("hello");
TemporaryDir test_dir;
std::string path = android::base::StringPrintf("%s/does-not-exist", test_dir.path);
std::string err;
EXPECT_TRUE(WriteFile(path, s, &err));
EXPECT_EQ("", err);
EXPECT_TRUE(ReadFile(path, &s2, &err));
EXPECT_EQ("", err);
EXPECT_EQ(s, s2);
struct stat sb;
int fd = open(path.c_str(), O_RDONLY | O_NOFOLLOW | O_CLOEXEC);
EXPECT_NE(-1, fd);
EXPECT_EQ(0, fstat(fd, &sb));
EXPECT_EQ((const unsigned int)(S_IRUSR | S_IWUSR), sb.st_mode & 0777);
EXPECT_EQ(0, unlink(path.c_str()));
}
TEST(util, WriteFileExist) {
std::string s2("");
TemporaryFile tf;
ASSERT_TRUE(tf.fd != -1);
std::string err;
EXPECT_TRUE(WriteFile(tf.path, "1hello1", &err)) << strerror(errno);
EXPECT_EQ("", err);
EXPECT_TRUE(ReadFile(tf.path, &s2, &err));
EXPECT_EQ("", err);
EXPECT_STREQ("1hello1", s2.c_str());
EXPECT_TRUE(WriteFile(tf.path, "2ll2", &err));
EXPECT_EQ("", err);
EXPECT_TRUE(ReadFile(tf.path, &s2, &err));
EXPECT_EQ("", err);
EXPECT_STREQ("2ll2", s2.c_str());
}
TEST(util, DecodeUid) {
uid_t decoded_uid;
std::string err;
EXPECT_TRUE(DecodeUid("root", &decoded_uid, &err));
EXPECT_EQ("", err);
EXPECT_EQ(0U, decoded_uid);
EXPECT_FALSE(DecodeUid("toot", &decoded_uid, &err));
EXPECT_EQ("getpwnam failed: No such file or directory", err);
EXPECT_EQ(UINT_MAX, decoded_uid);
EXPECT_TRUE(DecodeUid("123", &decoded_uid, &err));
EXPECT_EQ("", err);
EXPECT_EQ(123U, decoded_uid);
}
TEST(util, is_dir) {
TemporaryDir test_dir;
EXPECT_TRUE(is_dir(test_dir.path));
TemporaryFile tf;
EXPECT_FALSE(is_dir(tf.path));
}
TEST(util, mkdir_recursive) {
TemporaryDir test_dir;
std::string path = android::base::StringPrintf("%s/three/directories/deep", test_dir.path);
EXPECT_EQ(0, mkdir_recursive(path, 0755, nullptr));
std::string path1 = android::base::StringPrintf("%s/three", test_dir.path);
EXPECT_TRUE(is_dir(path1.c_str()));
std::string path2 = android::base::StringPrintf("%s/three/directories", test_dir.path);
EXPECT_TRUE(is_dir(path1.c_str()));
std::string path3 = android::base::StringPrintf("%s/three/directories/deep", test_dir.path);
EXPECT_TRUE(is_dir(path1.c_str()));
}
TEST(util, mkdir_recursive_extra_slashes) {
TemporaryDir test_dir;
std::string path = android::base::StringPrintf("%s/three////directories/deep//", test_dir.path);
EXPECT_EQ(0, mkdir_recursive(path, 0755, nullptr));
std::string path1 = android::base::StringPrintf("%s/three", test_dir.path);
EXPECT_TRUE(is_dir(path1.c_str()));
std::string path2 = android::base::StringPrintf("%s/three/directories", test_dir.path);
EXPECT_TRUE(is_dir(path1.c_str()));
std::string path3 = android::base::StringPrintf("%s/three/directories/deep", test_dir.path);
EXPECT_TRUE(is_dir(path1.c_str()));
}
} // namespace init
} // namespace android
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