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android13/system/update_engine/common/utils_unittest.cc

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//
// Copyright (C) 2012 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 "update_engine/common/utils.h"
#include <fcntl.h>
#include <stdint.h>
#include <sys/mount.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <limits>
#include <string>
#include <vector>
#include <base/files/file_path.h>
#include <base/files/file_util.h>
#include <base/files/scoped_temp_dir.h>
#include <gtest/gtest.h>
#include "update_engine/common/test_utils.h"
using std::numeric_limits;
using std::string;
using std::vector;
namespace chromeos_update_engine {
class UtilsTest : public ::testing::Test {};
TEST(UtilsTest, WriteFileOpenFailure) {
EXPECT_FALSE(utils::WriteFile("/this/doesn't/exist", "hello", 5));
}
TEST(UtilsTest, WriteFileReadFile) {
ScopedTempFile file;
EXPECT_TRUE(utils::WriteFile(file.path().c_str(), "hello", 5));
brillo::Blob readback;
EXPECT_TRUE(utils::ReadFile(file.path().c_str(), &readback));
EXPECT_EQ("hello", string(readback.begin(), readback.end()));
}
TEST(UtilsTest, ReadFileFailure) {
brillo::Blob empty;
EXPECT_FALSE(utils::ReadFile("/this/doesn't/exist", &empty));
}
TEST(UtilsTest, ReadFileChunk) {
ScopedTempFile file;
brillo::Blob data;
const size_t kSize = 1024 * 1024;
for (size_t i = 0; i < kSize; i++) {
data.push_back(i % 255);
}
EXPECT_TRUE(test_utils::WriteFileVector(file.path(), data));
brillo::Blob in_data;
EXPECT_TRUE(utils::ReadFileChunk(file.path().c_str(), kSize, 10, &in_data));
EXPECT_TRUE(in_data.empty());
EXPECT_TRUE(utils::ReadFileChunk(file.path().c_str(), 0, -1, &in_data));
EXPECT_EQ(data, in_data);
in_data.clear();
EXPECT_TRUE(utils::ReadFileChunk(file.path().c_str(), 10, 20, &in_data));
EXPECT_EQ(brillo::Blob(data.begin() + 10, data.begin() + 10 + 20), in_data);
}
TEST(UtilsTest, IsSymlinkTest) {
base::ScopedTempDir temp_dir;
ASSERT_TRUE(temp_dir.CreateUniqueTempDir());
string temp_file = temp_dir.GetPath().Append("temp-file").value();
EXPECT_TRUE(utils::WriteFile(temp_file.c_str(), "", 0));
string temp_symlink = temp_dir.GetPath().Append("temp-symlink").value();
EXPECT_EQ(0, symlink(temp_file.c_str(), temp_symlink.c_str()));
EXPECT_FALSE(utils::IsSymlink(temp_dir.GetPath().value().c_str()));
EXPECT_FALSE(utils::IsSymlink(temp_file.c_str()));
EXPECT_TRUE(utils::IsSymlink(temp_symlink.c_str()));
EXPECT_FALSE(utils::IsSymlink("/non/existent/path"));
}
TEST(UtilsTest, SplitPartitionNameTest) {
string disk;
int part_num;
EXPECT_TRUE(utils::SplitPartitionName("/dev/sda3", &disk, &part_num));
EXPECT_EQ("/dev/sda", disk);
EXPECT_EQ(3, part_num);
EXPECT_TRUE(utils::SplitPartitionName("/dev/sdp1234", &disk, &part_num));
EXPECT_EQ("/dev/sdp", disk);
EXPECT_EQ(1234, part_num);
EXPECT_TRUE(utils::SplitPartitionName("/dev/mmcblk0p3", &disk, &part_num));
EXPECT_EQ("/dev/mmcblk0", disk);
EXPECT_EQ(3, part_num);
EXPECT_TRUE(utils::SplitPartitionName("/dev/loop10", &disk, &part_num));
EXPECT_EQ("/dev/loop", disk);
EXPECT_EQ(10, part_num);
EXPECT_TRUE(utils::SplitPartitionName("/dev/loop28p11", &disk, &part_num));
EXPECT_EQ("/dev/loop28", disk);
EXPECT_EQ(11, part_num);
EXPECT_FALSE(utils::SplitPartitionName("/dev/mmcblk0p", &disk, &part_num));
EXPECT_FALSE(utils::SplitPartitionName("/dev/sda", &disk, &part_num));
EXPECT_FALSE(utils::SplitPartitionName("/dev/foo/bar", &disk, &part_num));
EXPECT_FALSE(utils::SplitPartitionName("/", &disk, &part_num));
EXPECT_FALSE(utils::SplitPartitionName("", &disk, &part_num));
}
TEST(UtilsTest, MakePartitionNameTest) {
EXPECT_EQ("/dev/sda4", utils::MakePartitionName("/dev/sda", 4));
EXPECT_EQ("/dev/sda123", utils::MakePartitionName("/dev/sda", 123));
EXPECT_EQ("/dev/mmcblk2", utils::MakePartitionName("/dev/mmcblk", 2));
EXPECT_EQ("/dev/mmcblk0p2", utils::MakePartitionName("/dev/mmcblk0", 2));
EXPECT_EQ("/dev/loop8", utils::MakePartitionName("/dev/loop", 8));
EXPECT_EQ("/dev/loop12p2", utils::MakePartitionName("/dev/loop12", 2));
}
TEST(UtilsTest, FuzzIntTest) {
static const uint32_t kRanges[] = {0, 1, 2, 20};
for (uint32_t range : kRanges) {
const int kValue = 50;
for (int tries = 0; tries < 100; ++tries) {
uint32_t value = utils::FuzzInt(kValue, range);
EXPECT_GE(value, kValue - range / 2);
EXPECT_LE(value, kValue + range - range / 2);
}
}
}
namespace {
void GetFileFormatTester(const string& expected,
const vector<uint8_t>& contents) {
ScopedTempFile file;
ASSERT_TRUE(utils::WriteFile(file.path().c_str(),
reinterpret_cast<const char*>(contents.data()),
contents.size()));
EXPECT_EQ(expected, utils::GetFileFormat(file.path()));
}
} // namespace
TEST(UtilsTest, GetFileFormatTest) {
EXPECT_EQ("File not found.", utils::GetFileFormat("/path/to/nowhere"));
GetFileFormatTester("data", vector<uint8_t>{1, 2, 3, 4, 5, 6, 7, 8});
GetFileFormatTester("ELF", vector<uint8_t>{0x7f, 0x45, 0x4c, 0x46});
// Real tests from cros_installer on different boards.
// ELF 32-bit LSB executable, Intel 80386
GetFileFormatTester(
"ELF 32-bit little-endian x86",
vector<uint8_t>{0x7f, 0x45, 0x4c, 0x46, 0x01, 0x01, 0x01, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x02, 0x00, 0x03, 0x00, 0x01, 0x00, 0x00, 0x00,
0x90, 0x83, 0x04, 0x08, 0x34, 0x00, 0x00, 0x00});
// ELF 32-bit LSB executable, MIPS
GetFileFormatTester(
"ELF 32-bit little-endian mips",
vector<uint8_t>{0x7f, 0x45, 0x4c, 0x46, 0x01, 0x01, 0x01, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x03, 0x00, 0x08, 0x00, 0x01, 0x00, 0x00, 0x00,
0xc0, 0x12, 0x00, 0x00, 0x34, 0x00, 0x00, 0x00});
// ELF 32-bit LSB executable, ARM
GetFileFormatTester(
"ELF 32-bit little-endian arm",
vector<uint8_t>{0x7f, 0x45, 0x4c, 0x46, 0x01, 0x01, 0x01, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x02, 0x00, 0x28, 0x00, 0x01, 0x00, 0x00, 0x00,
0x85, 0x8b, 0x00, 0x00, 0x34, 0x00, 0x00, 0x00});
// ELF 64-bit LSB executable, x86-64
GetFileFormatTester(
"ELF 64-bit little-endian x86-64",
vector<uint8_t>{0x7f, 0x45, 0x4c, 0x46, 0x02, 0x01, 0x01, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x02, 0x00, 0x3e, 0x00, 0x01, 0x00, 0x00, 0x00,
0xb0, 0x04, 0x40, 0x00, 0x00, 0x00, 0x00, 0x00});
}
TEST(UtilsTest, FormatTimeDeltaTest) {
// utils::FormatTimeDelta() is not locale-aware (it's only used for logging
// which is not localized) so we only need to test the C locale
EXPECT_EQ(utils::FormatTimeDelta(base::TimeDelta::FromMilliseconds(100)),
"0.1s");
EXPECT_EQ(utils::FormatTimeDelta(base::TimeDelta::FromSeconds(0)), "0s");
EXPECT_EQ(utils::FormatTimeDelta(base::TimeDelta::FromSeconds(1)), "1s");
EXPECT_EQ(utils::FormatTimeDelta(base::TimeDelta::FromSeconds(59)), "59s");
EXPECT_EQ(utils::FormatTimeDelta(base::TimeDelta::FromSeconds(60)), "1m0s");
EXPECT_EQ(utils::FormatTimeDelta(base::TimeDelta::FromSeconds(61)), "1m1s");
EXPECT_EQ(utils::FormatTimeDelta(base::TimeDelta::FromSeconds(90)), "1m30s");
EXPECT_EQ(utils::FormatTimeDelta(base::TimeDelta::FromSeconds(1205)),
"20m5s");
EXPECT_EQ(utils::FormatTimeDelta(base::TimeDelta::FromSeconds(3600)),
"1h0m0s");
EXPECT_EQ(utils::FormatTimeDelta(base::TimeDelta::FromSeconds(3601)),
"1h0m1s");
EXPECT_EQ(utils::FormatTimeDelta(base::TimeDelta::FromSeconds(3661)),
"1h1m1s");
EXPECT_EQ(utils::FormatTimeDelta(base::TimeDelta::FromSeconds(7261)),
"2h1m1s");
EXPECT_EQ(utils::FormatTimeDelta(base::TimeDelta::FromSeconds(86400)),
"1d0h0m0s");
EXPECT_EQ(utils::FormatTimeDelta(base::TimeDelta::FromSeconds(86401)),
"1d0h0m1s");
EXPECT_EQ(utils::FormatTimeDelta(base::TimeDelta::FromSeconds(200000)),
"2d7h33m20s");
EXPECT_EQ(utils::FormatTimeDelta(base::TimeDelta::FromSeconds(200000) +
base::TimeDelta::FromMilliseconds(1)),
"2d7h33m20.001s");
EXPECT_EQ(utils::FormatTimeDelta(base::TimeDelta::FromSeconds(-1)), "-1s");
}
TEST(UtilsTest, ConvertToOmahaInstallDate) {
// The Omaha Epoch starts at Jan 1, 2007 0:00 PST which is a
// Monday. In Unix time, this point in time is easily obtained via
// the date(1) command like this:
//
// $ date +"%s" --date="Jan 1, 2007 0:00 PST"
const time_t omaha_epoch = 1167638400;
int value;
// Points in time *on and after* the Omaha epoch should not fail.
EXPECT_TRUE(utils::ConvertToOmahaInstallDate(
base::Time::FromTimeT(omaha_epoch), &value));
EXPECT_GE(value, 0);
// Anything before the Omaha epoch should fail. We test it for two points.
EXPECT_FALSE(utils::ConvertToOmahaInstallDate(
base::Time::FromTimeT(omaha_epoch - 1), &value));
EXPECT_FALSE(utils::ConvertToOmahaInstallDate(
base::Time::FromTimeT(omaha_epoch - 100 * 24 * 3600), &value));
// Check that we jump from 0 to 7 exactly on the one-week mark, e.g.
// on Jan 8, 2007 0:00 PST.
EXPECT_TRUE(utils::ConvertToOmahaInstallDate(
base::Time::FromTimeT(omaha_epoch + 7 * 24 * 3600 - 1), &value));
EXPECT_EQ(value, 0);
EXPECT_TRUE(utils::ConvertToOmahaInstallDate(
base::Time::FromTimeT(omaha_epoch + 7 * 24 * 3600), &value));
EXPECT_EQ(value, 7);
// Check a couple of more values.
EXPECT_TRUE(utils::ConvertToOmahaInstallDate(
base::Time::FromTimeT(omaha_epoch + 10 * 24 * 3600), &value));
EXPECT_EQ(value, 7);
EXPECT_TRUE(utils::ConvertToOmahaInstallDate(
base::Time::FromTimeT(omaha_epoch + 20 * 24 * 3600), &value));
EXPECT_EQ(value, 14);
EXPECT_TRUE(utils::ConvertToOmahaInstallDate(
base::Time::FromTimeT(omaha_epoch + 26 * 24 * 3600), &value));
EXPECT_EQ(value, 21);
EXPECT_TRUE(utils::ConvertToOmahaInstallDate(
base::Time::FromTimeT(omaha_epoch + 29 * 24 * 3600), &value));
EXPECT_EQ(value, 28);
// The date Jun 4, 2007 0:00 PDT is a Monday and is hence a point
// where the Omaha InstallDate jumps 7 days. Its unix time is
// 1180940400. Notably, this is a point in time where Daylight
// Savings Time (DST) was is in effect (e.g. it's PDT, not PST).
//
// Note that as utils::ConvertToOmahaInstallDate() _deliberately_
// ignores DST (as it's hard to implement in a thread-safe way using
// glibc, see comments in utils.h) we have to fudge by the DST
// offset which is one hour. Conveniently, if the function were
// someday modified to be DST aware, this test would have to be
// modified as well.
const time_t dst_time = 1180940400; // Jun 4, 2007 0:00 PDT.
const time_t fudge = 3600;
int value1, value2;
EXPECT_TRUE(utils::ConvertToOmahaInstallDate(
base::Time::FromTimeT(dst_time + fudge - 1), &value1));
EXPECT_TRUE(utils::ConvertToOmahaInstallDate(
base::Time::FromTimeT(dst_time + fudge), &value2));
EXPECT_EQ(value1, value2 - 7);
}
TEST(UtilsTest, GetMinorVersion) {
// Test GetMinorVersion by verifying that it parses the conf file and returns
// the correct value.
uint32_t minor_version;
brillo::KeyValueStore store;
EXPECT_FALSE(utils::GetMinorVersion(store, &minor_version));
EXPECT_TRUE(store.LoadFromString("PAYLOAD_MINOR_VERSION=one-two-three\n"));
EXPECT_FALSE(utils::GetMinorVersion(store, &minor_version));
EXPECT_TRUE(store.LoadFromString("PAYLOAD_MINOR_VERSION=123\n"));
EXPECT_TRUE(utils::GetMinorVersion(store, &minor_version));
EXPECT_EQ(123U, minor_version);
}
static bool BoolMacroTestHelper() {
int i = 1;
unsigned int ui = 1;
bool b = 1;
std::unique_ptr<char> cptr(new char);
TEST_AND_RETURN_FALSE(i);
TEST_AND_RETURN_FALSE(ui);
TEST_AND_RETURN_FALSE(b);
TEST_AND_RETURN_FALSE(cptr);
TEST_AND_RETURN_FALSE_ERRNO(i);
TEST_AND_RETURN_FALSE_ERRNO(ui);
TEST_AND_RETURN_FALSE_ERRNO(b);
TEST_AND_RETURN_FALSE_ERRNO(cptr);
return true;
}
static void VoidMacroTestHelper(bool* ret) {
int i = 1;
unsigned int ui = 1;
bool b = 1;
std::unique_ptr<char> cptr(new char);
*ret = false;
TEST_AND_RETURN(i);
TEST_AND_RETURN(ui);
TEST_AND_RETURN(b);
TEST_AND_RETURN(cptr);
TEST_AND_RETURN_ERRNO(i);
TEST_AND_RETURN_ERRNO(ui);
TEST_AND_RETURN_ERRNO(b);
TEST_AND_RETURN_ERRNO(cptr);
*ret = true;
}
static void ExpectParseRollbackKeyVersion(const string& version,
uint16_t expected_high,
uint16_t expected_low) {
uint16_t actual_high;
uint16_t actual_low;
utils::ParseRollbackKeyVersion(version, &actual_high, &actual_low);
EXPECT_EQ(expected_high, actual_high);
EXPECT_EQ(expected_low, actual_low);
}
static void ExpectInvalidParseRollbackKeyVersion(const string& version) {
ExpectParseRollbackKeyVersion(version,
numeric_limits<uint16_t>::max(),
numeric_limits<uint16_t>::max());
}
TEST(UtilsTest, TestMacros) {
bool void_test = false;
VoidMacroTestHelper(&void_test);
EXPECT_TRUE(void_test);
EXPECT_TRUE(BoolMacroTestHelper());
}
TEST(UtilsTest, RunAsRootUnmountFilesystemFailureTest) {
EXPECT_FALSE(utils::UnmountFilesystem("/path/to/non-existing-dir"));
}
TEST(UtilsTest, RunAsRootUnmountFilesystemBusyFailureTest) {
ScopedTempFile tmp_image("img.XXXXXX");
EXPECT_TRUE(base::CopyFile(
test_utils::GetBuildArtifactsPath().Append("gen/disk_ext2_4k.img"),
base::FilePath(tmp_image.path())));
base::ScopedTempDir mnt_dir;
EXPECT_TRUE(mnt_dir.CreateUniqueTempDir());
string loop_dev;
test_utils::ScopedLoopbackDeviceBinder loop_binder(
tmp_image.path(), true, &loop_dev);
EXPECT_FALSE(utils::IsMountpoint(mnt_dir.GetPath().value()));
// This is the actual test part. While we hold a file descriptor open for the
// mounted filesystem, umount should still succeed.
EXPECT_TRUE(utils::MountFilesystem(
loop_dev, mnt_dir.GetPath().value(), MS_RDONLY, "ext4", ""));
// Verify the directory is a mount point now.
EXPECT_TRUE(utils::IsMountpoint(mnt_dir.GetPath().value()));
string target_file = mnt_dir.GetPath().Append("empty-file").value();
int fd = HANDLE_EINTR(open(target_file.c_str(), O_RDONLY));
EXPECT_GE(fd, 0);
EXPECT_TRUE(utils::UnmountFilesystem(mnt_dir.GetPath().value()));
// The filesystem should be already unmounted at this point.
EXPECT_FALSE(utils::IsMountpoint(mnt_dir.GetPath().value()));
IGNORE_EINTR(close(fd));
// The filesystem was already unmounted so this call should fail.
EXPECT_FALSE(utils::UnmountFilesystem(mnt_dir.GetPath().value()));
}
TEST(UtilsTest, IsMountpointTest) {
EXPECT_TRUE(utils::IsMountpoint("/"));
EXPECT_FALSE(utils::IsMountpoint("/path/to/nowhere"));
base::ScopedTempDir mnt_dir;
EXPECT_TRUE(mnt_dir.CreateUniqueTempDir());
EXPECT_FALSE(utils::IsMountpoint(mnt_dir.GetPath().value()));
ScopedTempFile file;
EXPECT_FALSE(utils::IsMountpoint(file.path()));
}
TEST(UtilsTest, VersionPrefix) {
EXPECT_EQ(10575, utils::VersionPrefix("10575.39."));
EXPECT_EQ(10575, utils::VersionPrefix("10575.39"));
EXPECT_EQ(10575, utils::VersionPrefix("10575.x"));
EXPECT_EQ(10575, utils::VersionPrefix("10575."));
EXPECT_EQ(10575, utils::VersionPrefix("10575"));
EXPECT_EQ(0, utils::VersionPrefix(""));
EXPECT_EQ(-1, utils::VersionPrefix("x"));
EXPECT_EQ(-1, utils::VersionPrefix("1x"));
EXPECT_EQ(-1, utils::VersionPrefix("x.1"));
}
TEST(UtilsTest, ParseDottedVersion) {
// Valid case.
ExpectParseRollbackKeyVersion("2.3", 2, 3);
ExpectParseRollbackKeyVersion("65535.65535", 65535, 65535);
// Zero is technically allowed but never actually used.
ExpectParseRollbackKeyVersion("0.0", 0, 0);
// Invalid cases.
ExpectInvalidParseRollbackKeyVersion("");
ExpectInvalidParseRollbackKeyVersion("2");
ExpectInvalidParseRollbackKeyVersion("2.");
ExpectInvalidParseRollbackKeyVersion(".2");
ExpectInvalidParseRollbackKeyVersion("2.2.");
ExpectInvalidParseRollbackKeyVersion("2.2.3");
ExpectInvalidParseRollbackKeyVersion(".2.2");
ExpectInvalidParseRollbackKeyVersion("a.b");
ExpectInvalidParseRollbackKeyVersion("1.b");
ExpectInvalidParseRollbackKeyVersion("a.2");
ExpectInvalidParseRollbackKeyVersion("65536.65536");
ExpectInvalidParseRollbackKeyVersion("99999.99999");
ExpectInvalidParseRollbackKeyVersion("99999.1");
ExpectInvalidParseRollbackKeyVersion("1.99999");
}
TEST(UtilsTest, GetFilePathTest) {
ScopedTempFile file;
int fd = HANDLE_EINTR(open(file.path().c_str(), O_RDONLY));
EXPECT_GE(fd, 0);
EXPECT_EQ(file.path(), utils::GetFilePath(fd));
EXPECT_EQ("not found", utils::GetFilePath(-1));
IGNORE_EINTR(close(fd));
}
TEST(UtilsTest, ValidatePerPartitionTimestamp) {
ASSERT_EQ(ErrorCode::kPayloadTimestampError,
utils::IsTimestampNewer("10", "5"));
ASSERT_EQ(ErrorCode::kSuccess, utils::IsTimestampNewer("10", "11"));
ASSERT_EQ(ErrorCode::kDownloadManifestParseError,
utils::IsTimestampNewer("10", "lol"));
ASSERT_EQ(ErrorCode::kError, utils::IsTimestampNewer("lol", "ZZZ"));
ASSERT_EQ(ErrorCode::kSuccess, utils::IsTimestampNewer("10", ""));
}
} // namespace chromeos_update_engine
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