| // |
| // 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 <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::string; |
| using std::vector; |
| |
| namespace chromeos_update_engine { |
| |
| class UtilsTest : public ::testing::Test { }; |
| |
| TEST(UtilsTest, CanParseECVersion) { |
| // Should be able to parse and valid key value line. |
| EXPECT_EQ("12345", utils::ParseECVersion("fw_version=12345")); |
| EXPECT_EQ("123456", utils::ParseECVersion( |
| "b=1231a fw_version=123456 a=fasd2")); |
| EXPECT_EQ("12345", utils::ParseECVersion("fw_version=12345")); |
| EXPECT_EQ("00VFA616", utils::ParseECVersion( |
| "vendor=\"sam\" fw_version=\"00VFA616\"")); |
| |
| // For invalid entries, should return the empty string. |
| EXPECT_EQ("", utils::ParseECVersion("b=1231a fw_version a=fasd2")); |
| } |
| |
| TEST(UtilsTest, ReadFileFailure) { |
| brillo::Blob empty; |
| EXPECT_FALSE(utils::ReadFile("/this/doesn't/exist", &empty)); |
| } |
| |
| TEST(UtilsTest, ReadFileChunk) { |
| base::FilePath file; |
| EXPECT_TRUE(base::CreateTemporaryFile(&file)); |
| ScopedPathUnlinker unlinker(file.value()); |
| brillo::Blob data; |
| const size_t kSize = 1024 * 1024; |
| for (size_t i = 0; i < kSize; i++) { |
| data.push_back(i % 255); |
| } |
| EXPECT_TRUE(utils::WriteFile(file.value().c_str(), data.data(), data.size())); |
| brillo::Blob in_data; |
| EXPECT_TRUE(utils::ReadFileChunk(file.value().c_str(), kSize, 10, &in_data)); |
| EXPECT_TRUE(in_data.empty()); |
| EXPECT_TRUE(utils::ReadFileChunk(file.value().c_str(), 0, -1, &in_data)); |
| EXPECT_TRUE(data == in_data); |
| in_data.clear(); |
| EXPECT_TRUE(utils::ReadFileChunk(file.value().c_str(), 10, 20, &in_data)); |
| EXPECT_TRUE(brillo::Blob(data.begin() + 10, data.begin() + 10 + 20) == |
| in_data); |
| } |
| |
| TEST(UtilsTest, ErrnoNumberAsStringTest) { |
| EXPECT_EQ("No such file or directory", utils::ErrnoNumberAsString(ENOENT)); |
| } |
| |
| TEST(UtilsTest, IsSymlinkTest) { |
| base::ScopedTempDir temp_dir; |
| ASSERT_TRUE(temp_dir.CreateUniqueTempDir()); |
| string temp_file = temp_dir.path().Append("temp-file").value(); |
| EXPECT_TRUE(utils::WriteFile(temp_file.c_str(), "", 0)); |
| string temp_symlink = temp_dir.path().Append("temp-symlink").value(); |
| EXPECT_EQ(0, symlink(temp_file.c_str(), temp_symlink.c_str())); |
| EXPECT_FALSE(utils::IsSymlink(temp_dir.path().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/ubiblock3_2", &disk, &part_num)); |
| EXPECT_EQ("/dev/ubiblock", 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_TRUE(utils::SplitPartitionName("/dev/loop10_0", &disk, &part_num)); |
| EXPECT_EQ("/dev/loop", disk); |
| EXPECT_EQ(10, part_num); |
| |
| EXPECT_TRUE(utils::SplitPartitionName("/dev/loop28p11_0", &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)); |
| EXPECT_EQ("/dev/ubi5_0", utils::MakePartitionName("/dev/ubiblock", 5)); |
| EXPECT_EQ("/dev/mtd4", utils::MakePartitionName("/dev/ubiblock", 4)); |
| EXPECT_EQ("/dev/ubi3_0", utils::MakePartitionName("/dev/ubiblock", 3)); |
| EXPECT_EQ("/dev/mtd2", utils::MakePartitionName("/dev/ubiblock", 2)); |
| EXPECT_EQ("/dev/ubi1_0", utils::MakePartitionName("/dev/ubiblock", 1)); |
| } |
| |
| TEST(UtilsTest, MakePartitionNameForMountTest) { |
| EXPECT_EQ("/dev/sda4", utils::MakePartitionNameForMount("/dev/sda4")); |
| EXPECT_EQ("/dev/sda123", utils::MakePartitionNameForMount("/dev/sda123")); |
| EXPECT_EQ("/dev/mmcblk2", utils::MakePartitionNameForMount("/dev/mmcblk2")); |
| EXPECT_EQ("/dev/mmcblk0p2", |
| utils::MakePartitionNameForMount("/dev/mmcblk0p2")); |
| EXPECT_EQ("/dev/loop0", utils::MakePartitionNameForMount("/dev/loop0")); |
| EXPECT_EQ("/dev/loop8", utils::MakePartitionNameForMount("/dev/loop8")); |
| EXPECT_EQ("/dev/loop12p2", |
| utils::MakePartitionNameForMount("/dev/loop12p2")); |
| EXPECT_EQ("/dev/ubiblock5_0", |
| utils::MakePartitionNameForMount("/dev/ubiblock5_0")); |
| EXPECT_EQ("/dev/mtd4", |
| utils::MakePartitionNameForMount("/dev/ubi4_0")); |
| EXPECT_EQ("/dev/ubiblock3_0", |
| utils::MakePartitionNameForMount("/dev/ubiblock3")); |
| EXPECT_EQ("/dev/mtd2", utils::MakePartitionNameForMount("/dev/ubi2")); |
| EXPECT_EQ("/dev/ubi1_0", |
| utils::MakePartitionNameForMount("/dev/ubiblock1")); |
| } |
| |
| 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) { |
| test_utils::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, TimeFromStructTimespecTest) { |
| struct timespec ts; |
| |
| // Unix epoch (Thursday 00:00:00 UTC on Jan 1, 1970) |
| ts = (struct timespec) {.tv_sec = 0, .tv_nsec = 0}; |
| EXPECT_EQ(base::Time::UnixEpoch(), utils::TimeFromStructTimespec(&ts)); |
| |
| // 42 ms after the Unix billennium (Sunday 01:46:40 UTC on September 9, 2001) |
| ts = (struct timespec) {.tv_sec = 1000 * 1000 * 1000, |
| .tv_nsec = 42 * 1000 * 1000}; |
| base::Time::Exploded exploded = (base::Time::Exploded) { |
| .year = 2001, .month = 9, .day_of_week = 0, .day_of_month = 9, |
| .hour = 1, .minute = 46, .second = 40, .millisecond = 42}; |
| EXPECT_EQ(base::Time::FromUTCExploded(exploded), |
| utils::TimeFromStructTimespec(&ts)); |
| } |
| |
| TEST(UtilsTest, DecodeAndStoreBase64String) { |
| base::FilePath path; |
| |
| // Ensure we return false on empty strings or invalid base64. |
| EXPECT_FALSE(utils::DecodeAndStoreBase64String("", &path)); |
| EXPECT_FALSE(utils::DecodeAndStoreBase64String("not valid base64", &path)); |
| |
| // Pass known base64 and check that it matches. This string was generated |
| // the following way: |
| // |
| // $ echo "Update Engine" | base64 |
| // VXBkYXRlIEVuZ2luZQo= |
| EXPECT_TRUE(utils::DecodeAndStoreBase64String("VXBkYXRlIEVuZ2luZQo=", |
| &path)); |
| ScopedPathUnlinker unlinker(path.value()); |
| string expected_contents = "Update Engine\n"; |
| string contents; |
| EXPECT_TRUE(utils::ReadFile(path.value(), &contents)); |
| EXPECT_EQ(contents, expected_contents); |
| EXPECT_EQ(static_cast<off_t>(expected_contents.size()), |
| utils::FileSize(path.value())); |
| } |
| |
| 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; |
| } |
| |
| 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) { |
| string tmp_image; |
| EXPECT_TRUE(utils::MakeTempFile("img.XXXXXX", &tmp_image, nullptr)); |
| ScopedPathUnlinker tmp_image_unlinker(tmp_image); |
| |
| EXPECT_TRUE(base::CopyFile( |
| test_utils::GetBuildArtifactsPath().Append("gen/disk_ext2_4k.img"), |
| base::FilePath(tmp_image))); |
| |
| base::ScopedTempDir mnt_dir; |
| EXPECT_TRUE(mnt_dir.CreateUniqueTempDir()); |
| |
| string loop_dev; |
| test_utils::ScopedLoopbackDeviceBinder loop_binder( |
| tmp_image, true, &loop_dev); |
| |
| // 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.path().value(), MS_RDONLY, "ext4", "")); |
| string target_file = mnt_dir.path().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.path().value())); |
| IGNORE_EINTR(close(fd)); |
| // The filesystem was already unmounted so this call should fail. |
| EXPECT_FALSE(utils::UnmountFilesystem(mnt_dir.path().value())); |
| } |
| |
| } // namespace chromeos_update_engine |
