Darin Petkov | 296889c | 2010-07-23 16:20:54 -0700 | [diff] [blame] | 1 | // Copyright (c) 2009 The Chromium OS Authors. All rights reserved. |
adlr@google.com | 3defe6a | 2009-12-04 20:57:17 +0000 | [diff] [blame] | 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | #include "update_engine/utils.h" |
Darin Petkov | f74eb65 | 2010-08-04 12:08:38 -0700 | [diff] [blame] | 6 | |
adlr@google.com | 3defe6a | 2009-12-04 20:57:17 +0000 | [diff] [blame] | 7 | #include <sys/mount.h> |
Darin Petkov | c6c135c | 2010-08-11 13:36:18 -0700 | [diff] [blame] | 8 | #include <sys/resource.h> |
adlr@google.com | 3defe6a | 2009-12-04 20:57:17 +0000 | [diff] [blame] | 9 | #include <sys/stat.h> |
| 10 | #include <sys/types.h> |
| 11 | #include <dirent.h> |
| 12 | #include <errno.h> |
Andrew de los Reyes | 970bb28 | 2009-12-09 16:34:04 -0800 | [diff] [blame] | 13 | #include <fcntl.h> |
adlr@google.com | 3defe6a | 2009-12-04 20:57:17 +0000 | [diff] [blame] | 14 | #include <stdio.h> |
| 15 | #include <stdlib.h> |
| 16 | #include <string.h> |
| 17 | #include <unistd.h> |
Darin Petkov | f74eb65 | 2010-08-04 12:08:38 -0700 | [diff] [blame] | 18 | |
adlr@google.com | 3defe6a | 2009-12-04 20:57:17 +0000 | [diff] [blame] | 19 | #include <algorithm> |
Darin Petkov | f74eb65 | 2010-08-04 12:08:38 -0700 | [diff] [blame] | 20 | |
Will Drewry | 8f71da8 | 2010-08-30 14:07:11 -0500 | [diff] [blame] | 21 | #include <base/file_path.h> |
| 22 | #include <base/file_util.h> |
| 23 | #include <base/rand_util.h> |
| 24 | #include <base/string_util.h> |
| 25 | #include <base/logging.h> |
| 26 | #include <rootdev/rootdev.h> |
| 27 | |
Andrew de los Reyes | 970bb28 | 2009-12-09 16:34:04 -0800 | [diff] [blame] | 28 | #include "update_engine/file_writer.h" |
Darin Petkov | 33d3064 | 2010-08-04 10:18:57 -0700 | [diff] [blame] | 29 | #include "update_engine/omaha_request_params.h" |
Darin Petkov | 296889c | 2010-07-23 16:20:54 -0700 | [diff] [blame] | 30 | #include "update_engine/subprocess.h" |
adlr@google.com | 3defe6a | 2009-12-04 20:57:17 +0000 | [diff] [blame] | 31 | |
| 32 | using std::min; |
| 33 | using std::string; |
| 34 | using std::vector; |
| 35 | |
| 36 | namespace chromeos_update_engine { |
| 37 | |
| 38 | namespace utils { |
| 39 | |
Darin Petkov | 2a0e633 | 2010-09-24 14:43:41 -0700 | [diff] [blame] | 40 | static const char kOOBECompletedMarker[] = "/home/chronos/.oobe_completed"; |
| 41 | |
Darin Petkov | 33d3064 | 2010-08-04 10:18:57 -0700 | [diff] [blame] | 42 | bool IsOfficialBuild() { |
| 43 | OmahaRequestDeviceParams params; |
| 44 | if (!params.Init("", "")) { |
| 45 | return true; |
| 46 | } |
| 47 | return params.app_track != "buildbot-build" && |
| 48 | params.app_track != "developer-build"; |
| 49 | } |
| 50 | |
Darin Petkov | 2a0e633 | 2010-09-24 14:43:41 -0700 | [diff] [blame] | 51 | bool IsOOBEComplete() { |
| 52 | return file_util::PathExists(FilePath(kOOBECompletedMarker)); |
| 53 | } |
| 54 | |
Andrew de los Reyes | 970bb28 | 2009-12-09 16:34:04 -0800 | [diff] [blame] | 55 | bool WriteFile(const char* path, const char* data, int data_len) { |
| 56 | DirectFileWriter writer; |
| 57 | TEST_AND_RETURN_FALSE_ERRNO(0 == writer.Open(path, |
| 58 | O_WRONLY | O_CREAT | O_TRUNC, |
Chris Masone | 4dc2ada | 2010-09-23 12:43:03 -0700 | [diff] [blame] | 59 | 0600)); |
Andrew de los Reyes | 970bb28 | 2009-12-09 16:34:04 -0800 | [diff] [blame] | 60 | ScopedFileWriterCloser closer(&writer); |
| 61 | TEST_AND_RETURN_FALSE_ERRNO(data_len == writer.Write(data, data_len)); |
| 62 | return true; |
| 63 | } |
| 64 | |
Andrew de los Reyes | 09e56d6 | 2010-04-23 13:45:53 -0700 | [diff] [blame] | 65 | bool WriteAll(int fd, const void* buf, size_t count) { |
Andrew de los Reyes | b10320d | 2010-03-31 16:44:44 -0700 | [diff] [blame] | 66 | const char* c_buf = static_cast<const char*>(buf); |
| 67 | ssize_t bytes_written = 0; |
| 68 | while (bytes_written < static_cast<ssize_t>(count)) { |
| 69 | ssize_t rc = write(fd, c_buf + bytes_written, count - bytes_written); |
| 70 | TEST_AND_RETURN_FALSE_ERRNO(rc >= 0); |
| 71 | bytes_written += rc; |
| 72 | } |
| 73 | return true; |
| 74 | } |
| 75 | |
Andrew de los Reyes | 09e56d6 | 2010-04-23 13:45:53 -0700 | [diff] [blame] | 76 | bool PWriteAll(int fd, const void* buf, size_t count, off_t offset) { |
| 77 | const char* c_buf = static_cast<const char*>(buf); |
| 78 | ssize_t bytes_written = 0; |
| 79 | while (bytes_written < static_cast<ssize_t>(count)) { |
| 80 | ssize_t rc = pwrite(fd, c_buf + bytes_written, count - bytes_written, |
| 81 | offset + bytes_written); |
| 82 | TEST_AND_RETURN_FALSE_ERRNO(rc >= 0); |
| 83 | bytes_written += rc; |
| 84 | } |
| 85 | return true; |
| 86 | } |
| 87 | |
| 88 | bool PReadAll(int fd, void* buf, size_t count, off_t offset, |
| 89 | ssize_t* out_bytes_read) { |
| 90 | char* c_buf = static_cast<char*>(buf); |
| 91 | ssize_t bytes_read = 0; |
| 92 | while (bytes_read < static_cast<ssize_t>(count)) { |
| 93 | ssize_t rc = pread(fd, c_buf + bytes_read, count - bytes_read, |
| 94 | offset + bytes_read); |
| 95 | TEST_AND_RETURN_FALSE_ERRNO(rc >= 0); |
| 96 | if (rc == 0) { |
| 97 | break; |
| 98 | } |
| 99 | bytes_read += rc; |
| 100 | } |
| 101 | *out_bytes_read = bytes_read; |
| 102 | return true; |
Darin Petkov | 296889c | 2010-07-23 16:20:54 -0700 | [diff] [blame] | 103 | |
Andrew de los Reyes | 09e56d6 | 2010-04-23 13:45:53 -0700 | [diff] [blame] | 104 | } |
| 105 | |
adlr@google.com | 3defe6a | 2009-12-04 20:57:17 +0000 | [diff] [blame] | 106 | bool ReadFile(const std::string& path, std::vector<char>* out) { |
| 107 | CHECK(out); |
| 108 | FILE* fp = fopen(path.c_str(), "r"); |
| 109 | if (!fp) |
| 110 | return false; |
| 111 | const size_t kChunkSize = 1024; |
| 112 | size_t read_size; |
| 113 | do { |
| 114 | char buf[kChunkSize]; |
| 115 | read_size = fread(buf, 1, kChunkSize, fp); |
| 116 | if (read_size == 0) |
| 117 | break; |
| 118 | out->insert(out->end(), buf, buf + read_size); |
| 119 | } while (read_size == kChunkSize); |
| 120 | bool success = !ferror(fp); |
| 121 | TEST_AND_RETURN_FALSE_ERRNO(fclose(fp) == 0); |
| 122 | return success; |
| 123 | } |
| 124 | |
| 125 | bool ReadFileToString(const std::string& path, std::string* out) { |
| 126 | vector<char> data; |
| 127 | bool success = ReadFile(path, &data); |
| 128 | if (!success) { |
| 129 | return false; |
| 130 | } |
| 131 | (*out) = string(&data[0], data.size()); |
| 132 | return true; |
| 133 | } |
| 134 | |
Andrew de los Reyes | f4c7ef1 | 2010-04-30 10:37:00 -0700 | [diff] [blame] | 135 | off_t FileSize(const string& path) { |
| 136 | struct stat stbuf; |
| 137 | int rc = stat(path.c_str(), &stbuf); |
| 138 | CHECK_EQ(rc, 0); |
| 139 | if (rc < 0) |
| 140 | return rc; |
| 141 | return stbuf.st_size; |
| 142 | } |
| 143 | |
adlr@google.com | 3defe6a | 2009-12-04 20:57:17 +0000 | [diff] [blame] | 144 | void HexDumpArray(const unsigned char* const arr, const size_t length) { |
| 145 | const unsigned char* const char_arr = |
| 146 | reinterpret_cast<const unsigned char* const>(arr); |
| 147 | LOG(INFO) << "Logging array of length: " << length; |
| 148 | const unsigned int bytes_per_line = 16; |
Andrew de los Reyes | 08c4e27 | 2010-04-15 14:02:17 -0700 | [diff] [blame] | 149 | for (uint32_t i = 0; i < length; i += bytes_per_line) { |
adlr@google.com | 3defe6a | 2009-12-04 20:57:17 +0000 | [diff] [blame] | 150 | const unsigned int bytes_remaining = length - i; |
| 151 | const unsigned int bytes_per_this_line = min(bytes_per_line, |
| 152 | bytes_remaining); |
| 153 | char header[100]; |
| 154 | int r = snprintf(header, sizeof(header), "0x%08x : ", i); |
| 155 | TEST_AND_RETURN(r == 13); |
| 156 | string line = header; |
| 157 | for (unsigned int j = 0; j < bytes_per_this_line; j++) { |
| 158 | char buf[20]; |
| 159 | unsigned char c = char_arr[i + j]; |
| 160 | r = snprintf(buf, sizeof(buf), "%02x ", static_cast<unsigned int>(c)); |
| 161 | TEST_AND_RETURN(r == 3); |
| 162 | line += buf; |
| 163 | } |
| 164 | LOG(INFO) << line; |
| 165 | } |
| 166 | } |
| 167 | |
| 168 | namespace { |
| 169 | class ScopedDirCloser { |
| 170 | public: |
| 171 | explicit ScopedDirCloser(DIR** dir) : dir_(dir) {} |
| 172 | ~ScopedDirCloser() { |
| 173 | if (dir_ && *dir_) { |
| 174 | int r = closedir(*dir_); |
| 175 | TEST_AND_RETURN_ERRNO(r == 0); |
| 176 | *dir_ = NULL; |
| 177 | dir_ = NULL; |
| 178 | } |
| 179 | } |
| 180 | private: |
| 181 | DIR** dir_; |
| 182 | }; |
| 183 | } // namespace {} |
| 184 | |
| 185 | bool RecursiveUnlinkDir(const std::string& path) { |
| 186 | struct stat stbuf; |
| 187 | int r = lstat(path.c_str(), &stbuf); |
| 188 | TEST_AND_RETURN_FALSE_ERRNO((r == 0) || (errno == ENOENT)); |
| 189 | if ((r < 0) && (errno == ENOENT)) |
| 190 | // path request is missing. that's fine. |
| 191 | return true; |
| 192 | if (!S_ISDIR(stbuf.st_mode)) { |
| 193 | TEST_AND_RETURN_FALSE_ERRNO((unlink(path.c_str()) == 0) || |
Andrew de los Reyes | b10320d | 2010-03-31 16:44:44 -0700 | [diff] [blame] | 194 | (errno == ENOENT)); |
adlr@google.com | 3defe6a | 2009-12-04 20:57:17 +0000 | [diff] [blame] | 195 | // success or path disappeared before we could unlink. |
| 196 | return true; |
| 197 | } |
| 198 | { |
| 199 | // We have a dir, unlink all children, then delete dir |
| 200 | DIR *dir = opendir(path.c_str()); |
| 201 | TEST_AND_RETURN_FALSE_ERRNO(dir); |
| 202 | ScopedDirCloser dir_closer(&dir); |
| 203 | struct dirent dir_entry; |
| 204 | struct dirent *dir_entry_p; |
| 205 | int err = 0; |
| 206 | while ((err = readdir_r(dir, &dir_entry, &dir_entry_p)) == 0) { |
| 207 | if (dir_entry_p == NULL) { |
| 208 | // end of stream reached |
| 209 | break; |
| 210 | } |
| 211 | // Skip . and .. |
| 212 | if (!strcmp(dir_entry_p->d_name, ".") || |
| 213 | !strcmp(dir_entry_p->d_name, "..")) |
| 214 | continue; |
| 215 | TEST_AND_RETURN_FALSE(RecursiveUnlinkDir(path + "/" + |
Andrew de los Reyes | b10320d | 2010-03-31 16:44:44 -0700 | [diff] [blame] | 216 | dir_entry_p->d_name)); |
adlr@google.com | 3defe6a | 2009-12-04 20:57:17 +0000 | [diff] [blame] | 217 | } |
| 218 | TEST_AND_RETURN_FALSE(err == 0); |
| 219 | } |
| 220 | // unlink dir |
| 221 | TEST_AND_RETURN_FALSE_ERRNO((rmdir(path.c_str()) == 0) || (errno == ENOENT)); |
| 222 | return true; |
| 223 | } |
| 224 | |
Andrew de los Reyes | f971443 | 2010-05-04 10:21:23 -0700 | [diff] [blame] | 225 | string RootDevice(const string& partition_device) { |
Darin Petkov | f74eb65 | 2010-08-04 12:08:38 -0700 | [diff] [blame] | 226 | FilePath device_path(partition_device); |
| 227 | if (device_path.DirName().value() != "/dev") { |
| 228 | return ""; |
| 229 | } |
Andrew de los Reyes | f971443 | 2010-05-04 10:21:23 -0700 | [diff] [blame] | 230 | string::const_iterator it = --partition_device.end(); |
| 231 | for (; it >= partition_device.begin(); --it) { |
| 232 | if (!isdigit(*it)) |
| 233 | break; |
| 234 | } |
| 235 | // Some devices contain a p before the partitions. For example: |
| 236 | // /dev/mmc0p4 should be shortened to /dev/mmc0. |
| 237 | if (*it == 'p') |
| 238 | --it; |
| 239 | return string(partition_device.begin(), it + 1); |
| 240 | } |
| 241 | |
| 242 | string PartitionNumber(const string& partition_device) { |
| 243 | CHECK(!partition_device.empty()); |
| 244 | string::const_iterator it = --partition_device.end(); |
| 245 | for (; it >= partition_device.begin(); --it) { |
| 246 | if (!isdigit(*it)) |
| 247 | break; |
| 248 | } |
| 249 | return string(it + 1, partition_device.end()); |
| 250 | } |
| 251 | |
Darin Petkov | f74eb65 | 2010-08-04 12:08:38 -0700 | [diff] [blame] | 252 | string SysfsBlockDevice(const string& device) { |
| 253 | FilePath device_path(device); |
| 254 | if (device_path.DirName().value() != "/dev") { |
| 255 | return ""; |
| 256 | } |
| 257 | return FilePath("/sys/block").Append(device_path.BaseName()).value(); |
| 258 | } |
| 259 | |
| 260 | bool IsRemovableDevice(const std::string& device) { |
| 261 | string sysfs_block = SysfsBlockDevice(device); |
| 262 | string removable; |
| 263 | if (sysfs_block.empty() || |
| 264 | !file_util::ReadFileToString(FilePath(sysfs_block).Append("removable"), |
| 265 | &removable)) { |
| 266 | return false; |
| 267 | } |
| 268 | TrimWhitespaceASCII(removable, TRIM_ALL, &removable); |
| 269 | return removable == "1"; |
| 270 | } |
| 271 | |
adlr@google.com | 3defe6a | 2009-12-04 20:57:17 +0000 | [diff] [blame] | 272 | std::string ErrnoNumberAsString(int err) { |
| 273 | char buf[100]; |
| 274 | buf[0] = '\0'; |
| 275 | return strerror_r(err, buf, sizeof(buf)); |
| 276 | } |
| 277 | |
| 278 | std::string NormalizePath(const std::string& path, bool strip_trailing_slash) { |
| 279 | string ret; |
| 280 | bool last_insert_was_slash = false; |
| 281 | for (string::const_iterator it = path.begin(); it != path.end(); ++it) { |
| 282 | if (*it == '/') { |
| 283 | if (last_insert_was_slash) |
| 284 | continue; |
| 285 | last_insert_was_slash = true; |
| 286 | } else { |
| 287 | last_insert_was_slash = false; |
| 288 | } |
| 289 | ret.push_back(*it); |
| 290 | } |
| 291 | if (strip_trailing_slash && last_insert_was_slash) { |
| 292 | string::size_type last_non_slash = ret.find_last_not_of('/'); |
| 293 | if (last_non_slash != string::npos) { |
| 294 | ret.resize(last_non_slash + 1); |
| 295 | } else { |
| 296 | ret = ""; |
| 297 | } |
| 298 | } |
| 299 | return ret; |
| 300 | } |
| 301 | |
| 302 | bool FileExists(const char* path) { |
| 303 | struct stat stbuf; |
| 304 | return 0 == lstat(path, &stbuf); |
| 305 | } |
| 306 | |
| 307 | std::string TempFilename(string path) { |
| 308 | static const string suffix("XXXXXX"); |
| 309 | CHECK(StringHasSuffix(path, suffix)); |
| 310 | do { |
| 311 | string new_suffix; |
| 312 | for (unsigned int i = 0; i < suffix.size(); i++) { |
| 313 | int r = rand() % (26 * 2 + 10); // [a-zA-Z0-9] |
| 314 | if (r < 26) |
| 315 | new_suffix.append(1, 'a' + r); |
| 316 | else if (r < (26 * 2)) |
| 317 | new_suffix.append(1, 'A' + r - 26); |
| 318 | else |
| 319 | new_suffix.append(1, '0' + r - (26 * 2)); |
| 320 | } |
| 321 | CHECK_EQ(new_suffix.size(), suffix.size()); |
| 322 | path.resize(path.size() - new_suffix.size()); |
| 323 | path.append(new_suffix); |
| 324 | } while (FileExists(path.c_str())); |
| 325 | return path; |
| 326 | } |
| 327 | |
Andrew de los Reyes | b10320d | 2010-03-31 16:44:44 -0700 | [diff] [blame] | 328 | bool MakeTempFile(const std::string& filename_template, |
| 329 | std::string* filename, |
| 330 | int* fd) { |
| 331 | DCHECK(filename || fd); |
| 332 | vector<char> buf(filename_template.size() + 1); |
| 333 | memcpy(&buf[0], filename_template.data(), filename_template.size()); |
| 334 | buf[filename_template.size()] = '\0'; |
Darin Petkov | 296889c | 2010-07-23 16:20:54 -0700 | [diff] [blame] | 335 | |
Andrew de los Reyes | b10320d | 2010-03-31 16:44:44 -0700 | [diff] [blame] | 336 | int mkstemp_fd = mkstemp(&buf[0]); |
| 337 | TEST_AND_RETURN_FALSE_ERRNO(mkstemp_fd >= 0); |
| 338 | if (filename) { |
| 339 | *filename = &buf[0]; |
| 340 | } |
| 341 | if (fd) { |
| 342 | *fd = mkstemp_fd; |
| 343 | } else { |
| 344 | close(mkstemp_fd); |
| 345 | } |
| 346 | return true; |
| 347 | } |
| 348 | |
Andrew de los Reyes | 09e56d6 | 2010-04-23 13:45:53 -0700 | [diff] [blame] | 349 | bool MakeTempDirectory(const std::string& dirname_template, |
| 350 | std::string* dirname) { |
| 351 | DCHECK(dirname); |
| 352 | vector<char> buf(dirname_template.size() + 1); |
| 353 | memcpy(&buf[0], dirname_template.data(), dirname_template.size()); |
| 354 | buf[dirname_template.size()] = '\0'; |
Darin Petkov | 296889c | 2010-07-23 16:20:54 -0700 | [diff] [blame] | 355 | |
Andrew de los Reyes | 09e56d6 | 2010-04-23 13:45:53 -0700 | [diff] [blame] | 356 | char* return_code = mkdtemp(&buf[0]); |
| 357 | TEST_AND_RETURN_FALSE_ERRNO(return_code != NULL); |
| 358 | *dirname = &buf[0]; |
| 359 | return true; |
| 360 | } |
| 361 | |
adlr@google.com | 3defe6a | 2009-12-04 20:57:17 +0000 | [diff] [blame] | 362 | bool StringHasSuffix(const std::string& str, const std::string& suffix) { |
| 363 | if (suffix.size() > str.size()) |
| 364 | return false; |
| 365 | return 0 == str.compare(str.size() - suffix.size(), suffix.size(), suffix); |
| 366 | } |
| 367 | |
| 368 | bool StringHasPrefix(const std::string& str, const std::string& prefix) { |
| 369 | if (prefix.size() > str.size()) |
| 370 | return false; |
| 371 | return 0 == str.compare(0, prefix.size(), prefix); |
| 372 | } |
| 373 | |
Will Drewry | 8f71da8 | 2010-08-30 14:07:11 -0500 | [diff] [blame] | 374 | const std::string BootDevice() { |
| 375 | char boot_path[PATH_MAX]; |
| 376 | // Resolve the boot device path fully, including dereferencing |
| 377 | // through dm-verity. |
| 378 | int ret = rootdev(boot_path, sizeof(boot_path), true, false); |
| 379 | |
| 380 | if (ret < 0) { |
| 381 | LOG(ERROR) << "rootdev failed to find the root device"; |
adlr@google.com | 3defe6a | 2009-12-04 20:57:17 +0000 | [diff] [blame] | 382 | return ""; |
| 383 | } |
Will Drewry | 8f71da8 | 2010-08-30 14:07:11 -0500 | [diff] [blame] | 384 | LOG_IF(WARNING, ret > 0) << "rootdev found a device name with no device node"; |
| 385 | |
| 386 | // This local variable is used to construct the return string and is not |
| 387 | // passed around after use. |
| 388 | return boot_path; |
adlr@google.com | 3defe6a | 2009-12-04 20:57:17 +0000 | [diff] [blame] | 389 | } |
| 390 | |
Andrew de los Reyes | f918517 | 2010-05-03 11:07:05 -0700 | [diff] [blame] | 391 | const string BootKernelDevice(const std::string& boot_device) { |
| 392 | // Currntly this assumes the last digit of the boot device is |
| 393 | // 3, 5, or 7, and changes it to 2, 4, or 6, respectively, to |
| 394 | // get the kernel device. |
| 395 | string ret = boot_device; |
| 396 | if (ret.empty()) |
| 397 | return ret; |
| 398 | char last_char = ret[ret.size() - 1]; |
| 399 | if (last_char == '3' || last_char == '5' || last_char == '7') { |
| 400 | ret[ret.size() - 1] = last_char - 1; |
| 401 | return ret; |
| 402 | } |
| 403 | return ""; |
| 404 | } |
| 405 | |
adlr@google.com | 3defe6a | 2009-12-04 20:57:17 +0000 | [diff] [blame] | 406 | bool MountFilesystem(const string& device, |
Andrew de los Reyes | 09e56d6 | 2010-04-23 13:45:53 -0700 | [diff] [blame] | 407 | const string& mountpoint, |
| 408 | unsigned long mountflags) { |
| 409 | int rc = mount(device.c_str(), mountpoint.c_str(), "ext3", mountflags, NULL); |
adlr@google.com | 3defe6a | 2009-12-04 20:57:17 +0000 | [diff] [blame] | 410 | if (rc < 0) { |
| 411 | string msg = ErrnoNumberAsString(errno); |
| 412 | LOG(ERROR) << "Unable to mount destination device: " << msg << ". " |
| 413 | << device << " on " << mountpoint; |
| 414 | return false; |
| 415 | } |
| 416 | return true; |
| 417 | } |
| 418 | |
| 419 | bool UnmountFilesystem(const string& mountpoint) { |
| 420 | TEST_AND_RETURN_FALSE_ERRNO(umount(mountpoint.c_str()) == 0); |
| 421 | return true; |
| 422 | } |
| 423 | |
Andrew de los Reyes | f971443 | 2010-05-04 10:21:23 -0700 | [diff] [blame] | 424 | bool GetBootloader(BootLoader* out_bootloader) { |
| 425 | // For now, hardcode to syslinux. |
| 426 | *out_bootloader = BootLoader_SYSLINUX; |
| 427 | return true; |
| 428 | } |
| 429 | |
Andrew de los Reyes | c702078 | 2010-04-28 10:46:04 -0700 | [diff] [blame] | 430 | const char* GetGErrorMessage(const GError* error) { |
| 431 | if (!error) |
| 432 | return "Unknown error."; |
| 433 | return error->message; |
| 434 | } |
| 435 | |
Darin Petkov | 296889c | 2010-07-23 16:20:54 -0700 | [diff] [blame] | 436 | bool Reboot() { |
| 437 | vector<string> command; |
| 438 | command.push_back("/sbin/shutdown"); |
| 439 | command.push_back("-r"); |
| 440 | command.push_back("now"); |
| 441 | int rc = 0; |
| 442 | Subprocess::SynchronousExec(command, &rc); |
| 443 | TEST_AND_RETURN_FALSE(rc == 0); |
| 444 | return true; |
| 445 | } |
| 446 | |
Darin Petkov | c6c135c | 2010-08-11 13:36:18 -0700 | [diff] [blame] | 447 | bool SetProcessPriority(ProcessPriority priority) { |
| 448 | int prio = static_cast<int>(priority); |
| 449 | LOG(INFO) << "Setting process priority to " << prio; |
| 450 | TEST_AND_RETURN_FALSE(setpriority(PRIO_PROCESS, 0, prio) == 0); |
| 451 | return true; |
| 452 | } |
| 453 | |
| 454 | int ComparePriorities(ProcessPriority priority_lhs, |
| 455 | ProcessPriority priority_rhs) { |
| 456 | return static_cast<int>(priority_rhs) - static_cast<int>(priority_lhs); |
| 457 | } |
| 458 | |
Darin Petkov | 5c0a8af | 2010-08-24 13:39:13 -0700 | [diff] [blame] | 459 | int FuzzInt(int value, unsigned int range) { |
| 460 | int min = value - range / 2; |
| 461 | int max = value + range - range / 2; |
| 462 | return base::RandInt(min, max); |
| 463 | } |
| 464 | |
Andrew de los Reyes | 4fe15d0 | 2009-12-10 19:01:36 -0800 | [diff] [blame] | 465 | const char* const kStatefulPartition = "/mnt/stateful_partition"; |
adlr@google.com | 3defe6a | 2009-12-04 20:57:17 +0000 | [diff] [blame] | 466 | |
| 467 | } // namespace utils |
| 468 | |
| 469 | } // namespace chromeos_update_engine |