1// 2// Copyright (C) 2012 The Android Open Source Project 3// 4// Licensed under the Apache License, Version 2.0 (the "License"); 5// you may not use this file except in compliance with the License. 6// You may obtain a copy of the License at 7// 8// http://www.apache.org/licenses/LICENSE-2.0 9// 10// Unless required by applicable law or agreed to in writing, software 11// distributed under the License is distributed on an "AS IS" BASIS, 12// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13// See the License for the specific language governing permissions and 14// limitations under the License. 15// 16 17#include "update_engine/common/utils.h" 18 19#include <fcntl.h> 20#include <stdint.h> 21#include <sys/mount.h> 22#include <sys/stat.h> 23#include <sys/types.h> 24 25#include <string> 26#include <vector> 27 28#include <base/files/file_path.h> 29#include <base/files/file_util.h> 30#include <base/files/scoped_temp_dir.h> 31#include <gtest/gtest.h> 32 33#include "update_engine/common/test_utils.h" 34 35using std::string; 36using std::vector; 37 38namespace chromeos_update_engine { 39 40class UtilsTest : public ::testing::Test { }; 41 42TEST(UtilsTest, CanParseECVersion) { 43 // Should be able to parse and valid key value line. 44 EXPECT_EQ("12345", utils::ParseECVersion("fw_version=12345")); 45 EXPECT_EQ("123456", utils::ParseECVersion( 46 "b=1231a fw_version=123456 a=fasd2")); 47 EXPECT_EQ("12345", utils::ParseECVersion("fw_version=12345")); 48 EXPECT_EQ("00VFA616", utils::ParseECVersion( 49 "vendor=\"sam\" fw_version=\"00VFA616\"")); 50 51 // For invalid entries, should return the empty string. 52 EXPECT_EQ("", utils::ParseECVersion("b=1231a fw_version a=fasd2")); 53} 54 55TEST(UtilsTest, WriteFileOpenFailure) { 56 EXPECT_FALSE(utils::WriteFile("/this/doesn't/exist", "hello", 5)); 57} 58 59TEST(UtilsTest, WriteFileReadFile) { 60 base::FilePath file; 61 EXPECT_TRUE(base::CreateTemporaryFile(&file)); 62 ScopedPathUnlinker unlinker(file.value()); 63 EXPECT_TRUE(utils::WriteFile(file.value().c_str(), "hello", 5)); 64 65 brillo::Blob readback; 66 EXPECT_TRUE(utils::ReadFile(file.value().c_str(), &readback)); 67 EXPECT_EQ("hello", string(readback.begin(), readback.end())); 68} 69 70TEST(UtilsTest, ReadFileFailure) { 71 brillo::Blob empty; 72 EXPECT_FALSE(utils::ReadFile("/this/doesn't/exist", &empty)); 73} 74 75TEST(UtilsTest, ReadFileChunk) { 76 base::FilePath file; 77 EXPECT_TRUE(base::CreateTemporaryFile(&file)); 78 ScopedPathUnlinker unlinker(file.value()); 79 brillo::Blob data; 80 const size_t kSize = 1024 * 1024; 81 for (size_t i = 0; i < kSize; i++) { 82 data.push_back(i % 255); 83 } 84 EXPECT_TRUE(utils::WriteFile(file.value().c_str(), data.data(), data.size())); 85 brillo::Blob in_data; 86 EXPECT_TRUE(utils::ReadFileChunk(file.value().c_str(), kSize, 10, &in_data)); 87 EXPECT_TRUE(in_data.empty()); 88 EXPECT_TRUE(utils::ReadFileChunk(file.value().c_str(), 0, -1, &in_data)); 89 EXPECT_TRUE(data == in_data); 90 in_data.clear(); 91 EXPECT_TRUE(utils::ReadFileChunk(file.value().c_str(), 10, 20, &in_data)); 92 EXPECT_TRUE(brillo::Blob(data.begin() + 10, data.begin() + 10 + 20) == 93 in_data); 94} 95 96TEST(UtilsTest, ErrnoNumberAsStringTest) { 97 EXPECT_EQ("No such file or directory", utils::ErrnoNumberAsString(ENOENT)); 98} 99 100TEST(UtilsTest, IsSymlinkTest) { 101 base::ScopedTempDir temp_dir; 102 ASSERT_TRUE(temp_dir.CreateUniqueTempDir()); 103 string temp_file = temp_dir.path().Append("temp-file").value(); 104 EXPECT_TRUE(utils::WriteFile(temp_file.c_str(), "", 0)); 105 string temp_symlink = temp_dir.path().Append("temp-symlink").value(); 106 EXPECT_EQ(0, symlink(temp_file.c_str(), temp_symlink.c_str())); 107 EXPECT_FALSE(utils::IsSymlink(temp_dir.path().value().c_str())); 108 EXPECT_FALSE(utils::IsSymlink(temp_file.c_str())); 109 EXPECT_TRUE(utils::IsSymlink(temp_symlink.c_str())); 110 EXPECT_FALSE(utils::IsSymlink("/non/existent/path")); 111} 112 113TEST(UtilsTest, SplitPartitionNameTest) { 114 string disk; 115 int part_num; 116 117 EXPECT_TRUE(utils::SplitPartitionName("/dev/sda3", &disk, &part_num)); 118 EXPECT_EQ("/dev/sda", disk); 119 EXPECT_EQ(3, part_num); 120 121 EXPECT_TRUE(utils::SplitPartitionName("/dev/sdp1234", &disk, &part_num)); 122 EXPECT_EQ("/dev/sdp", disk); 123 EXPECT_EQ(1234, part_num); 124 125 EXPECT_TRUE(utils::SplitPartitionName("/dev/mmcblk0p3", &disk, &part_num)); 126 EXPECT_EQ("/dev/mmcblk0", disk); 127 EXPECT_EQ(3, part_num); 128 129 EXPECT_TRUE(utils::SplitPartitionName("/dev/ubiblock3_2", &disk, &part_num)); 130 EXPECT_EQ("/dev/ubiblock", disk); 131 EXPECT_EQ(3, part_num); 132 133 EXPECT_TRUE(utils::SplitPartitionName("/dev/loop10", &disk, &part_num)); 134 EXPECT_EQ("/dev/loop", disk); 135 EXPECT_EQ(10, part_num); 136 137 EXPECT_TRUE(utils::SplitPartitionName("/dev/loop28p11", &disk, &part_num)); 138 EXPECT_EQ("/dev/loop28", disk); 139 EXPECT_EQ(11, part_num); 140 141 EXPECT_TRUE(utils::SplitPartitionName("/dev/loop10_0", &disk, &part_num)); 142 EXPECT_EQ("/dev/loop", disk); 143 EXPECT_EQ(10, part_num); 144 145 EXPECT_TRUE(utils::SplitPartitionName("/dev/loop28p11_0", &disk, &part_num)); 146 EXPECT_EQ("/dev/loop28", disk); 147 EXPECT_EQ(11, part_num); 148 149 EXPECT_FALSE(utils::SplitPartitionName("/dev/mmcblk0p", &disk, &part_num)); 150 EXPECT_FALSE(utils::SplitPartitionName("/dev/sda", &disk, &part_num)); 151 EXPECT_FALSE(utils::SplitPartitionName("/dev/foo/bar", &disk, &part_num)); 152 EXPECT_FALSE(utils::SplitPartitionName("/", &disk, &part_num)); 153 EXPECT_FALSE(utils::SplitPartitionName("", &disk, &part_num)); 154} 155 156TEST(UtilsTest, MakePartitionNameTest) { 157 EXPECT_EQ("/dev/sda4", utils::MakePartitionName("/dev/sda", 4)); 158 EXPECT_EQ("/dev/sda123", utils::MakePartitionName("/dev/sda", 123)); 159 EXPECT_EQ("/dev/mmcblk2", utils::MakePartitionName("/dev/mmcblk", 2)); 160 EXPECT_EQ("/dev/mmcblk0p2", utils::MakePartitionName("/dev/mmcblk0", 2)); 161 EXPECT_EQ("/dev/loop8", utils::MakePartitionName("/dev/loop", 8)); 162 EXPECT_EQ("/dev/loop12p2", utils::MakePartitionName("/dev/loop12", 2)); 163 EXPECT_EQ("/dev/ubi5_0", utils::MakePartitionName("/dev/ubiblock", 5)); 164 EXPECT_EQ("/dev/mtd4", utils::MakePartitionName("/dev/ubiblock", 4)); 165 EXPECT_EQ("/dev/ubi3_0", utils::MakePartitionName("/dev/ubiblock", 3)); 166 EXPECT_EQ("/dev/mtd2", utils::MakePartitionName("/dev/ubiblock", 2)); 167 EXPECT_EQ("/dev/ubi1_0", utils::MakePartitionName("/dev/ubiblock", 1)); 168} 169 170TEST(UtilsTest, MakePartitionNameForMountTest) { 171 EXPECT_EQ("/dev/sda4", utils::MakePartitionNameForMount("/dev/sda4")); 172 EXPECT_EQ("/dev/sda123", utils::MakePartitionNameForMount("/dev/sda123")); 173 EXPECT_EQ("/dev/mmcblk2", utils::MakePartitionNameForMount("/dev/mmcblk2")); 174 EXPECT_EQ("/dev/mmcblk0p2", 175 utils::MakePartitionNameForMount("/dev/mmcblk0p2")); 176 EXPECT_EQ("/dev/loop0", utils::MakePartitionNameForMount("/dev/loop0")); 177 EXPECT_EQ("/dev/loop8", utils::MakePartitionNameForMount("/dev/loop8")); 178 EXPECT_EQ("/dev/loop12p2", 179 utils::MakePartitionNameForMount("/dev/loop12p2")); 180 EXPECT_EQ("/dev/ubiblock5_0", 181 utils::MakePartitionNameForMount("/dev/ubiblock5_0")); 182 EXPECT_EQ("/dev/mtd4", 183 utils::MakePartitionNameForMount("/dev/ubi4_0")); 184 EXPECT_EQ("/dev/ubiblock3_0", 185 utils::MakePartitionNameForMount("/dev/ubiblock3")); 186 EXPECT_EQ("/dev/mtd2", utils::MakePartitionNameForMount("/dev/ubi2")); 187 EXPECT_EQ("/dev/ubi1_0", 188 utils::MakePartitionNameForMount("/dev/ubiblock1")); 189} 190 191TEST(UtilsTest, FuzzIntTest) { 192 static const uint32_t kRanges[] = { 0, 1, 2, 20 }; 193 for (uint32_t range : kRanges) { 194 const int kValue = 50; 195 for (int tries = 0; tries < 100; ++tries) { 196 uint32_t value = utils::FuzzInt(kValue, range); 197 EXPECT_GE(value, kValue - range / 2); 198 EXPECT_LE(value, kValue + range - range / 2); 199 } 200 } 201} 202 203namespace { 204void GetFileFormatTester(const string& expected, 205 const vector<uint8_t>& contents) { 206 test_utils::ScopedTempFile file; 207 ASSERT_TRUE(utils::WriteFile(file.path().c_str(), 208 reinterpret_cast<const char*>(contents.data()), 209 contents.size())); 210 EXPECT_EQ(expected, utils::GetFileFormat(file.path())); 211} 212} // namespace 213 214TEST(UtilsTest, GetFileFormatTest) { 215 EXPECT_EQ("File not found.", utils::GetFileFormat("/path/to/nowhere")); 216 GetFileFormatTester("data", vector<uint8_t>{1, 2, 3, 4, 5, 6, 7, 8}); 217 GetFileFormatTester("ELF", vector<uint8_t>{0x7f, 0x45, 0x4c, 0x46}); 218 219 // Real tests from cros_installer on different boards. 220 // ELF 32-bit LSB executable, Intel 80386 221 GetFileFormatTester( 222 "ELF 32-bit little-endian x86", 223 vector<uint8_t>{0x7f, 0x45, 0x4c, 0x46, 0x01, 0x01, 0x01, 0x00, 224 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 225 0x02, 0x00, 0x03, 0x00, 0x01, 0x00, 0x00, 0x00, 226 0x90, 0x83, 0x04, 0x08, 0x34, 0x00, 0x00, 0x00}); 227 228 // ELF 32-bit LSB executable, MIPS 229 GetFileFormatTester( 230 "ELF 32-bit little-endian mips", 231 vector<uint8_t>{0x7f, 0x45, 0x4c, 0x46, 0x01, 0x01, 0x01, 0x00, 232 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 233 0x03, 0x00, 0x08, 0x00, 0x01, 0x00, 0x00, 0x00, 234 0xc0, 0x12, 0x00, 0x00, 0x34, 0x00, 0x00, 0x00}); 235 236 // ELF 32-bit LSB executable, ARM 237 GetFileFormatTester( 238 "ELF 32-bit little-endian arm", 239 vector<uint8_t>{0x7f, 0x45, 0x4c, 0x46, 0x01, 0x01, 0x01, 0x00, 240 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 241 0x02, 0x00, 0x28, 0x00, 0x01, 0x00, 0x00, 0x00, 242 0x85, 0x8b, 0x00, 0x00, 0x34, 0x00, 0x00, 0x00}); 243 244 // ELF 64-bit LSB executable, x86-64 245 GetFileFormatTester( 246 "ELF 64-bit little-endian x86-64", 247 vector<uint8_t>{0x7f, 0x45, 0x4c, 0x46, 0x02, 0x01, 0x01, 0x00, 248 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 249 0x02, 0x00, 0x3e, 0x00, 0x01, 0x00, 0x00, 0x00, 250 0xb0, 0x04, 0x40, 0x00, 0x00, 0x00, 0x00, 0x00}); 251} 252 253TEST(UtilsTest, FormatTimeDeltaTest) { 254 // utils::FormatTimeDelta() is not locale-aware (it's only used for logging 255 // which is not localized) so we only need to test the C locale 256 EXPECT_EQ(utils::FormatTimeDelta(base::TimeDelta::FromMilliseconds(100)), 257 "0.1s"); 258 EXPECT_EQ(utils::FormatTimeDelta(base::TimeDelta::FromSeconds(0)), 259 "0s"); 260 EXPECT_EQ(utils::FormatTimeDelta(base::TimeDelta::FromSeconds(1)), 261 "1s"); 262 EXPECT_EQ(utils::FormatTimeDelta(base::TimeDelta::FromSeconds(59)), 263 "59s"); 264 EXPECT_EQ(utils::FormatTimeDelta(base::TimeDelta::FromSeconds(60)), 265 "1m0s"); 266 EXPECT_EQ(utils::FormatTimeDelta(base::TimeDelta::FromSeconds(61)), 267 "1m1s"); 268 EXPECT_EQ(utils::FormatTimeDelta(base::TimeDelta::FromSeconds(90)), 269 "1m30s"); 270 EXPECT_EQ(utils::FormatTimeDelta(base::TimeDelta::FromSeconds(1205)), 271 "20m5s"); 272 EXPECT_EQ(utils::FormatTimeDelta(base::TimeDelta::FromSeconds(3600)), 273 "1h0m0s"); 274 EXPECT_EQ(utils::FormatTimeDelta(base::TimeDelta::FromSeconds(3601)), 275 "1h0m1s"); 276 EXPECT_EQ(utils::FormatTimeDelta(base::TimeDelta::FromSeconds(3661)), 277 "1h1m1s"); 278 EXPECT_EQ(utils::FormatTimeDelta(base::TimeDelta::FromSeconds(7261)), 279 "2h1m1s"); 280 EXPECT_EQ(utils::FormatTimeDelta(base::TimeDelta::FromSeconds(86400)), 281 "1d0h0m0s"); 282 EXPECT_EQ(utils::FormatTimeDelta(base::TimeDelta::FromSeconds(86401)), 283 "1d0h0m1s"); 284 EXPECT_EQ(utils::FormatTimeDelta(base::TimeDelta::FromSeconds(200000)), 285 "2d7h33m20s"); 286 EXPECT_EQ(utils::FormatTimeDelta(base::TimeDelta::FromSeconds(200000) + 287 base::TimeDelta::FromMilliseconds(1)), 288 "2d7h33m20.001s"); 289 EXPECT_EQ(utils::FormatTimeDelta(base::TimeDelta::FromSeconds(-1)), 290 "-1s"); 291} 292 293TEST(UtilsTest, TimeFromStructTimespecTest) { 294 struct timespec ts; 295 296 // Unix epoch (Thursday 00:00:00 UTC on Jan 1, 1970) 297 ts = (struct timespec) {.tv_sec = 0, .tv_nsec = 0}; 298 EXPECT_EQ(base::Time::UnixEpoch(), utils::TimeFromStructTimespec(&ts)); 299 300 // 42 ms after the Unix billennium (Sunday 01:46:40 UTC on September 9, 2001) 301 ts = (struct timespec) {.tv_sec = 1000 * 1000 * 1000, 302 .tv_nsec = 42 * 1000 * 1000}; 303 base::Time::Exploded exploded = (base::Time::Exploded) { 304 .year = 2001, .month = 9, .day_of_week = 0, .day_of_month = 9, 305 .hour = 1, .minute = 46, .second = 40, .millisecond = 42}; 306 EXPECT_EQ(base::Time::FromUTCExploded(exploded), 307 utils::TimeFromStructTimespec(&ts)); 308} 309 310TEST(UtilsTest, DecodeAndStoreBase64String) { 311 base::FilePath path; 312 313 // Ensure we return false on empty strings or invalid base64. 314 EXPECT_FALSE(utils::DecodeAndStoreBase64String("", &path)); 315 EXPECT_FALSE(utils::DecodeAndStoreBase64String("not valid base64", &path)); 316 317 // Pass known base64 and check that it matches. This string was generated 318 // the following way: 319 // 320 // $ echo "Update Engine" | base64 321 // VXBkYXRlIEVuZ2luZQo= 322 EXPECT_TRUE(utils::DecodeAndStoreBase64String("VXBkYXRlIEVuZ2luZQo=", 323 &path)); 324 ScopedPathUnlinker unlinker(path.value()); 325 string expected_contents = "Update Engine\n"; 326 string contents; 327 EXPECT_TRUE(utils::ReadFile(path.value(), &contents)); 328 EXPECT_EQ(contents, expected_contents); 329 EXPECT_EQ(static_cast<off_t>(expected_contents.size()), 330 utils::FileSize(path.value())); 331} 332 333TEST(UtilsTest, ConvertToOmahaInstallDate) { 334 // The Omaha Epoch starts at Jan 1, 2007 0:00 PST which is a 335 // Monday. In Unix time, this point in time is easily obtained via 336 // the date(1) command like this: 337 // 338 // $ date +"%s" --date="Jan 1, 2007 0:00 PST" 339 const time_t omaha_epoch = 1167638400; 340 int value; 341 342 // Points in time *on and after* the Omaha epoch should not fail. 343 EXPECT_TRUE(utils::ConvertToOmahaInstallDate( 344 base::Time::FromTimeT(omaha_epoch), &value)); 345 EXPECT_GE(value, 0); 346 347 // Anything before the Omaha epoch should fail. We test it for two points. 348 EXPECT_FALSE(utils::ConvertToOmahaInstallDate( 349 base::Time::FromTimeT(omaha_epoch - 1), &value)); 350 EXPECT_FALSE(utils::ConvertToOmahaInstallDate( 351 base::Time::FromTimeT(omaha_epoch - 100*24*3600), &value)); 352 353 // Check that we jump from 0 to 7 exactly on the one-week mark, e.g. 354 // on Jan 8, 2007 0:00 PST. 355 EXPECT_TRUE(utils::ConvertToOmahaInstallDate( 356 base::Time::FromTimeT(omaha_epoch + 7*24*3600 - 1), &value)); 357 EXPECT_EQ(value, 0); 358 EXPECT_TRUE(utils::ConvertToOmahaInstallDate( 359 base::Time::FromTimeT(omaha_epoch + 7*24*3600), &value)); 360 EXPECT_EQ(value, 7); 361 362 // Check a couple of more values. 363 EXPECT_TRUE(utils::ConvertToOmahaInstallDate( 364 base::Time::FromTimeT(omaha_epoch + 10*24*3600), &value)); 365 EXPECT_EQ(value, 7); 366 EXPECT_TRUE(utils::ConvertToOmahaInstallDate( 367 base::Time::FromTimeT(omaha_epoch + 20*24*3600), &value)); 368 EXPECT_EQ(value, 14); 369 EXPECT_TRUE(utils::ConvertToOmahaInstallDate( 370 base::Time::FromTimeT(omaha_epoch + 26*24*3600), &value)); 371 EXPECT_EQ(value, 21); 372 EXPECT_TRUE(utils::ConvertToOmahaInstallDate( 373 base::Time::FromTimeT(omaha_epoch + 29*24*3600), &value)); 374 EXPECT_EQ(value, 28); 375 376 // The date Jun 4, 2007 0:00 PDT is a Monday and is hence a point 377 // where the Omaha InstallDate jumps 7 days. Its unix time is 378 // 1180940400. Notably, this is a point in time where Daylight 379 // Savings Time (DST) was is in effect (e.g. it's PDT, not PST). 380 // 381 // Note that as utils::ConvertToOmahaInstallDate() _deliberately_ 382 // ignores DST (as it's hard to implement in a thread-safe way using 383 // glibc, see comments in utils.h) we have to fudge by the DST 384 // offset which is one hour. Conveniently, if the function were 385 // someday modified to be DST aware, this test would have to be 386 // modified as well. 387 const time_t dst_time = 1180940400; // Jun 4, 2007 0:00 PDT. 388 const time_t fudge = 3600; 389 int value1, value2; 390 EXPECT_TRUE(utils::ConvertToOmahaInstallDate( 391 base::Time::FromTimeT(dst_time + fudge - 1), &value1)); 392 EXPECT_TRUE(utils::ConvertToOmahaInstallDate( 393 base::Time::FromTimeT(dst_time + fudge), &value2)); 394 EXPECT_EQ(value1, value2 - 7); 395} 396 397TEST(UtilsTest, GetMinorVersion) { 398 // Test GetMinorVersion by verifying that it parses the conf file and returns 399 // the correct value. 400 uint32_t minor_version; 401 402 brillo::KeyValueStore store; 403 EXPECT_FALSE(utils::GetMinorVersion(store, &minor_version)); 404 405 EXPECT_TRUE(store.LoadFromString("PAYLOAD_MINOR_VERSION=one-two-three\n")); 406 EXPECT_FALSE(utils::GetMinorVersion(store, &minor_version)); 407 408 EXPECT_TRUE(store.LoadFromString("PAYLOAD_MINOR_VERSION=123\n")); 409 EXPECT_TRUE(utils::GetMinorVersion(store, &minor_version)); 410 EXPECT_EQ(123U, minor_version); 411} 412 413static bool BoolMacroTestHelper() { 414 int i = 1; 415 unsigned int ui = 1; 416 bool b = 1; 417 std::unique_ptr<char> cptr(new char); 418 419 TEST_AND_RETURN_FALSE(i); 420 TEST_AND_RETURN_FALSE(ui); 421 TEST_AND_RETURN_FALSE(b); 422 TEST_AND_RETURN_FALSE(cptr); 423 424 TEST_AND_RETURN_FALSE_ERRNO(i); 425 TEST_AND_RETURN_FALSE_ERRNO(ui); 426 TEST_AND_RETURN_FALSE_ERRNO(b); 427 TEST_AND_RETURN_FALSE_ERRNO(cptr); 428 429 return true; 430} 431 432static void VoidMacroTestHelper(bool* ret) { 433 int i = 1; 434 unsigned int ui = 1; 435 bool b = 1; 436 std::unique_ptr<char> cptr(new char); 437 438 *ret = false; 439 440 TEST_AND_RETURN(i); 441 TEST_AND_RETURN(ui); 442 TEST_AND_RETURN(b); 443 TEST_AND_RETURN(cptr); 444 445 TEST_AND_RETURN_ERRNO(i); 446 TEST_AND_RETURN_ERRNO(ui); 447 TEST_AND_RETURN_ERRNO(b); 448 TEST_AND_RETURN_ERRNO(cptr); 449 450 *ret = true; 451} 452 453TEST(UtilsTest, TestMacros) { 454 bool void_test = false; 455 VoidMacroTestHelper(&void_test); 456 EXPECT_TRUE(void_test); 457 458 EXPECT_TRUE(BoolMacroTestHelper()); 459} 460 461TEST(UtilsTest, RunAsRootUnmountFilesystemFailureTest) { 462 EXPECT_FALSE(utils::UnmountFilesystem("/path/to/non-existing-dir")); 463} 464 465TEST(UtilsTest, RunAsRootUnmountFilesystemBusyFailureTest) { 466 string tmp_image; 467 EXPECT_TRUE(utils::MakeTempFile("img.XXXXXX", &tmp_image, nullptr)); 468 ScopedPathUnlinker tmp_image_unlinker(tmp_image); 469 470 EXPECT_TRUE(base::CopyFile( 471 test_utils::GetBuildArtifactsPath().Append("gen/disk_ext2_4k.img"), 472 base::FilePath(tmp_image))); 473 474 base::ScopedTempDir mnt_dir; 475 EXPECT_TRUE(mnt_dir.CreateUniqueTempDir()); 476 477 string loop_dev; 478 test_utils::ScopedLoopbackDeviceBinder loop_binder( 479 tmp_image, true, &loop_dev); 480 481 EXPECT_FALSE(utils::IsMountpoint(mnt_dir.path().value())); 482 // This is the actual test part. While we hold a file descriptor open for the 483 // mounted filesystem, umount should still succeed. 484 EXPECT_TRUE(utils::MountFilesystem( 485 loop_dev, mnt_dir.path().value(), MS_RDONLY, "ext4", "")); 486 // Verify the directory is a mount point now. 487 EXPECT_TRUE(utils::IsMountpoint(mnt_dir.path().value())); 488 489 string target_file = mnt_dir.path().Append("empty-file").value(); 490 int fd = HANDLE_EINTR(open(target_file.c_str(), O_RDONLY)); 491 EXPECT_GE(fd, 0); 492 EXPECT_TRUE(utils::UnmountFilesystem(mnt_dir.path().value())); 493 // The filesystem should be already unmounted at this point. 494 EXPECT_FALSE(utils::IsMountpoint(mnt_dir.path().value())); 495 IGNORE_EINTR(close(fd)); 496 // The filesystem was already unmounted so this call should fail. 497 EXPECT_FALSE(utils::UnmountFilesystem(mnt_dir.path().value())); 498} 499 500TEST(UtilsTest, IsMountpointTest) { 501 EXPECT_TRUE(utils::IsMountpoint("/")); 502 EXPECT_FALSE(utils::IsMountpoint("/path/to/nowhere")); 503 504 base::ScopedTempDir mnt_dir; 505 EXPECT_TRUE(mnt_dir.CreateUniqueTempDir()); 506 EXPECT_FALSE(utils::IsMountpoint(mnt_dir.path().value())); 507 508 base::FilePath file; 509 EXPECT_TRUE(base::CreateTemporaryFile(&file)); 510 ScopedPathUnlinker unlinker(file.value()); 511 EXPECT_FALSE(utils::IsMountpoint(file.value())); 512} 513 514} // namespace chromeos_update_engine 515