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/*
* Copyright (C) 2013 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 "android-base/file.h"
#include <gtest/gtest.h>
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>
#include <string>
#include "android-base/test_utils.h"
TEST(file, ReadFileToString_ENOENT) {
std::string s("hello");
errno = 0;
ASSERT_FALSE(android::base::ReadFileToString("/proc/does-not-exist", &s));
EXPECT_EQ(ENOENT, errno);
EXPECT_EQ("", s); // s was cleared.
}
TEST(file, ReadFileToString_WriteStringToFile) {
TemporaryFile tf;
ASSERT_TRUE(tf.fd != -1);
ASSERT_TRUE(android::base::WriteStringToFile("abc", tf.path))
<< strerror(errno);
std::string s;
ASSERT_TRUE(android::base::ReadFileToString(tf.path, &s))
<< strerror(errno);
EXPECT_EQ("abc", s);
}
// symlinks require elevated privileges on Windows.
#if !defined(_WIN32)
TEST(file, ReadFileToString_WriteStringToFile_symlink) {
TemporaryFile target, link;
ASSERT_EQ(0, unlink(link.path));
ASSERT_EQ(0, symlink(target.path, link.path));
ASSERT_FALSE(android::base::WriteStringToFile("foo", link.path, false));
ASSERT_EQ(ELOOP, errno);
ASSERT_TRUE(android::base::WriteStringToFile("foo", link.path, true));
std::string s;
ASSERT_FALSE(android::base::ReadFileToString(link.path, &s));
ASSERT_EQ(ELOOP, errno);
ASSERT_TRUE(android::base::ReadFileToString(link.path, &s, true));
ASSERT_EQ("foo", s);
}
#endif
// WriteStringToFile2 is explicitly for setting Unix permissions, which make no
// sense on Windows.
#if !defined(_WIN32)
TEST(file, WriteStringToFile2) {
TemporaryFile tf;
ASSERT_TRUE(tf.fd != -1);
ASSERT_TRUE(android::base::WriteStringToFile("abc", tf.path, 0660,
getuid(), getgid()))
<< strerror(errno);
struct stat sb;
ASSERT_EQ(0, stat(tf.path, &sb));
ASSERT_EQ(0660U, static_cast<unsigned int>(sb.st_mode & ~S_IFMT));
ASSERT_EQ(getuid(), sb.st_uid);
ASSERT_EQ(getgid(), sb.st_gid);
std::string s;
ASSERT_TRUE(android::base::ReadFileToString(tf.path, &s))
<< strerror(errno);
EXPECT_EQ("abc", s);
}
#endif
TEST(file, WriteStringToFd) {
TemporaryFile tf;
ASSERT_TRUE(tf.fd != -1);
ASSERT_TRUE(android::base::WriteStringToFd("abc", tf.fd));
ASSERT_EQ(0, lseek(tf.fd, 0, SEEK_SET)) << strerror(errno);
std::string s;
ASSERT_TRUE(android::base::ReadFdToString(tf.fd, &s)) << strerror(errno);
EXPECT_EQ("abc", s);
}
TEST(file, WriteFully) {
TemporaryFile tf;
ASSERT_TRUE(tf.fd != -1);
ASSERT_TRUE(android::base::WriteFully(tf.fd, "abc", 3));
ASSERT_EQ(0, lseek(tf.fd, 0, SEEK_SET)) << strerror(errno);
std::string s;
s.resize(3);
ASSERT_TRUE(android::base::ReadFully(tf.fd, &s[0], s.size()))
<< strerror(errno);
EXPECT_EQ("abc", s);
ASSERT_EQ(0, lseek(tf.fd, 0, SEEK_SET)) << strerror(errno);
s.resize(1024);
ASSERT_FALSE(android::base::ReadFully(tf.fd, &s[0], s.size()));
}
TEST(file, RemoveFileIfExist) {
TemporaryFile tf;
ASSERT_TRUE(tf.fd != -1);
close(tf.fd);
tf.fd = -1;
std::string err;
ASSERT_TRUE(android::base::RemoveFileIfExists(tf.path, &err)) << err;
ASSERT_TRUE(android::base::RemoveFileIfExists(tf.path));
TemporaryDir td;
ASSERT_FALSE(android::base::RemoveFileIfExists(td.path));
ASSERT_FALSE(android::base::RemoveFileIfExists(td.path, &err));
ASSERT_EQ("is not a regular or symbol link file", err);
}
TEST(file, Readlink) {
#if !defined(_WIN32)
// Linux doesn't allow empty symbolic links.
std::string min("x");
// ext2 and ext4 both have PAGE_SIZE limits.
// If file encryption is enabled, there's extra overhead to store the
// size of the encrypted symlink target. There's also an off-by-one
// in current kernels (and marlin/sailfish where we're seeing this
// failure are still on 3.18, far from current). http://b/33306057.
std::string max(static_cast<size_t>(4096 - 2 - 1 - 1), 'x');
TemporaryDir td;
std::string min_path{std::string(td.path) + "/" + "min"};
std::string max_path{std::string(td.path) + "/" + "max"};
ASSERT_EQ(0, symlink(min.c_str(), min_path.c_str()));
ASSERT_EQ(0, symlink(max.c_str(), max_path.c_str()));
std::string result;
result = "wrong";
ASSERT_TRUE(android::base::Readlink(min_path, &result));
ASSERT_EQ(min, result);
result = "wrong";
ASSERT_TRUE(android::base::Readlink(max_path, &result));
ASSERT_EQ(max, result);
#endif
}
TEST(file, GetExecutablePath) {
ASSERT_NE("", android::base::GetExecutablePath());
}
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