blob: 0c0350a60bd9456c4a6b545999d5b418f35de14b [file] [log] [blame]
/*
* 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>
TEST(util, read_file_ENOENT) {
std::string s("hello");
errno = 0;
EXPECT_FALSE(read_file("/proc/does-not-exist", &s));
EXPECT_EQ(ENOENT, errno);
EXPECT_EQ("", s); // s was cleared.
}
TEST(util, read_file_group_writeable) {
std::string s("hello");
TemporaryFile tf;
ASSERT_TRUE(tf.fd != -1);
EXPECT_TRUE(write_file(tf.path, s)) << strerror(errno);
EXPECT_NE(-1, fchmodat(AT_FDCWD, tf.path, 0620, AT_SYMLINK_NOFOLLOW)) << strerror(errno);
EXPECT_FALSE(read_file(tf.path, &s)) << strerror(errno);
EXPECT_EQ("", s); // s was cleared.
}
TEST(util, read_file_world_writeable) {
std::string s("hello");
TemporaryFile tf;
ASSERT_TRUE(tf.fd != -1);
EXPECT_TRUE(write_file(tf.path, s.c_str())) << strerror(errno);
EXPECT_NE(-1, fchmodat(AT_FDCWD, tf.path, 0602, AT_SYMLINK_NOFOLLOW)) << strerror(errno);
EXPECT_FALSE(read_file(tf.path, &s)) << strerror(errno);
EXPECT_EQ("", s); // s was cleared.
}
TEST(util, read_file_symbolic_link) {
std::string s("hello");
errno = 0;
// lrwxrwxrwx 1 root root 13 1970-01-01 00:00 charger -> /sbin/healthd
EXPECT_FALSE(read_file("/charger", &s));
EXPECT_EQ(ELOOP, errno);
EXPECT_EQ("", s); // s was cleared.
}
TEST(util, read_file_success) {
std::string s("hello");
EXPECT_TRUE(read_file("/proc/version", &s));
EXPECT_GT(s.length(), 6U);
EXPECT_EQ('\n', s[s.length() - 1]);
s[5] = 0;
EXPECT_STREQ("Linux", s.c_str());
}
TEST(util, write_file_binary) {
std::string contents("abcd");
contents.push_back('\0');
contents.push_back('\0');
contents.append("dcba");
ASSERT_EQ(10u, contents.size());
TemporaryFile tf;
ASSERT_TRUE(tf.fd != -1);
EXPECT_TRUE(write_file(tf.path, contents)) << strerror(errno);
std::string read_back_contents;
EXPECT_TRUE(read_file(tf.path, &read_back_contents)) << strerror(errno);
EXPECT_EQ(contents, read_back_contents);
EXPECT_EQ(10u, read_back_contents.size());
}
TEST(util, write_file_not_exist) {
std::string s("hello");
std::string s2("hello");
TemporaryDir test_dir;
std::string path = android::base::StringPrintf("%s/does-not-exist", test_dir.path);
EXPECT_TRUE(write_file(path, s));
EXPECT_TRUE(read_file(path, &s2));
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, write_file_exist) {
std::string s2("");
TemporaryFile tf;
ASSERT_TRUE(tf.fd != -1);
EXPECT_TRUE(write_file(tf.path, "1hello1")) << strerror(errno);
EXPECT_TRUE(read_file(tf.path, &s2));
EXPECT_STREQ("1hello1", s2.c_str());
EXPECT_TRUE(write_file(tf.path, "2ll2"));
EXPECT_TRUE(read_file(tf.path, &s2));
EXPECT_STREQ("2ll2", s2.c_str());
}
TEST(util, decode_uid) {
EXPECT_EQ(0U, decode_uid("root"));
EXPECT_EQ(UINT_MAX, decode_uid("toot"));
EXPECT_EQ(123U, decode_uid("123"));
}