Joe Onorato | 3ad977b | 2009-05-05 11:50:51 -0700 | [diff] [blame] | 1 | #define LOG_TAG "file_backup_helper" |
| 2 | |
| 3 | #include <utils/backup_helpers.h> |
| 4 | |
| 5 | #include <utils/KeyedVector.h> |
| 6 | #include <utils/ByteOrder.h> |
| 7 | #include <utils/String8.h> |
| 8 | |
| 9 | #include <errno.h> |
| 10 | #include <sys/types.h> |
| 11 | #include <sys/uio.h> |
| 12 | #include <sys/stat.h> |
| 13 | #include <stdio.h> |
| 14 | #include <stdlib.h> |
| 15 | #include <unistd.h> |
Joe Onorato | c825d3e | 2009-05-06 12:55:46 -0400 | [diff] [blame] | 16 | #include <utime.h> |
Joe Onorato | 3ad977b | 2009-05-05 11:50:51 -0700 | [diff] [blame] | 17 | #include <fcntl.h> |
| 18 | #include <zlib.h> |
| 19 | |
| 20 | #include <cutils/log.h> |
| 21 | |
| 22 | using namespace android; |
| 23 | |
| 24 | #define MAGIC0 0x70616e53 // Snap |
| 25 | #define MAGIC1 0x656c6946 // File |
| 26 | |
Joe Onorato | 290bb01 | 2009-05-13 18:57:29 -0400 | [diff] [blame^] | 27 | #define LOGP(x...) LOGD(x) |
| 28 | //#define LOGP(x...) printf(x) |
| 29 | |
Joe Onorato | 3ad977b | 2009-05-05 11:50:51 -0700 | [diff] [blame] | 30 | struct SnapshotHeader { |
| 31 | int magic0; |
| 32 | int fileCount; |
| 33 | int magic1; |
| 34 | int totalSize; |
| 35 | }; |
| 36 | |
| 37 | struct FileState { |
| 38 | int modTime_sec; |
| 39 | int modTime_nsec; |
| 40 | int size; |
| 41 | int crc32; |
| 42 | int nameLen; |
| 43 | }; |
| 44 | |
| 45 | const static int ROUND_UP[4] = { 0, 3, 2, 1 }; |
| 46 | |
| 47 | static inline int |
| 48 | round_up(int n) |
| 49 | { |
| 50 | return n + ROUND_UP[n % 4]; |
| 51 | } |
| 52 | |
| 53 | static int |
| 54 | read_snapshot_file(int fd, KeyedVector<String8,FileState>* snapshot) |
| 55 | { |
| 56 | int bytesRead = 0; |
| 57 | int amt; |
| 58 | SnapshotHeader header; |
| 59 | |
| 60 | amt = read(fd, &header, sizeof(header)); |
| 61 | if (amt != sizeof(header)) { |
| 62 | return errno; |
| 63 | } |
| 64 | bytesRead += amt; |
| 65 | |
| 66 | if (header.magic0 != MAGIC0 || header.magic1 != MAGIC1) { |
| 67 | LOGW("read_snapshot_file header.magic0=0x%08x magic1=0x%08x", header.magic0, header.magic1); |
| 68 | return 1; |
| 69 | } |
| 70 | |
| 71 | for (int i=0; i<header.fileCount; i++) { |
| 72 | FileState file; |
| 73 | char filenameBuf[128]; |
| 74 | |
| 75 | amt = read(fd, &file, sizeof(file)); |
| 76 | if (amt != sizeof(file)) { |
| 77 | LOGW("read_snapshot_file FileState truncated/error with read at %d bytes\n", bytesRead); |
| 78 | return 1; |
| 79 | } |
| 80 | bytesRead += amt; |
| 81 | |
| 82 | // filename is not NULL terminated, but it is padded |
| 83 | int nameBufSize = round_up(file.nameLen); |
| 84 | char* filename = nameBufSize <= (int)sizeof(filenameBuf) |
| 85 | ? filenameBuf |
| 86 | : (char*)malloc(nameBufSize); |
| 87 | amt = read(fd, filename, nameBufSize); |
| 88 | if (amt == nameBufSize) { |
| 89 | snapshot->add(String8(filename, file.nameLen), file); |
| 90 | } |
| 91 | bytesRead += amt; |
| 92 | if (filename != filenameBuf) { |
| 93 | free(filename); |
| 94 | } |
| 95 | if (amt != nameBufSize) { |
| 96 | LOGW("read_snapshot_file filename truncated/error with read at %d bytes\n", bytesRead); |
| 97 | return 1; |
| 98 | } |
| 99 | } |
| 100 | |
| 101 | if (header.totalSize != bytesRead) { |
| 102 | LOGW("read_snapshot_file length mismatch: header.totalSize=%d bytesRead=%d\n", |
| 103 | header.totalSize, bytesRead); |
| 104 | return 1; |
| 105 | } |
| 106 | |
| 107 | return 0; |
| 108 | } |
| 109 | |
| 110 | static int |
| 111 | write_snapshot_file(int fd, const KeyedVector<String8,FileState>& snapshot) |
| 112 | { |
| 113 | int bytesWritten = sizeof(SnapshotHeader); |
| 114 | // preflight size |
| 115 | const int N = snapshot.size(); |
| 116 | for (int i=0; i<N; i++) { |
| 117 | const String8& name = snapshot.keyAt(i); |
| 118 | bytesWritten += sizeof(FileState) + round_up(name.length()); |
| 119 | } |
| 120 | |
| 121 | int amt; |
| 122 | SnapshotHeader header = { MAGIC0, N, MAGIC1, bytesWritten }; |
| 123 | |
| 124 | amt = write(fd, &header, sizeof(header)); |
| 125 | if (amt != sizeof(header)) { |
| 126 | LOGW("write_snapshot_file error writing header %s", strerror(errno)); |
| 127 | return errno; |
| 128 | } |
| 129 | |
| 130 | for (int i=0; i<header.fileCount; i++) { |
| 131 | const String8& name = snapshot.keyAt(i); |
| 132 | FileState file = snapshot.valueAt(i); |
| 133 | int nameLen = file.nameLen = name.length(); |
| 134 | |
| 135 | amt = write(fd, &file, sizeof(file)); |
| 136 | if (amt != sizeof(file)) { |
| 137 | LOGW("write_snapshot_file error writing header %s", strerror(errno)); |
| 138 | return 1; |
| 139 | } |
| 140 | |
| 141 | // filename is not NULL terminated, but it is padded |
| 142 | amt = write(fd, name.string(), nameLen); |
| 143 | if (amt != nameLen) { |
| 144 | LOGW("write_snapshot_file error writing filename %s", strerror(errno)); |
| 145 | return 1; |
| 146 | } |
| 147 | int paddingLen = ROUND_UP[nameLen % 4]; |
| 148 | if (paddingLen != 0) { |
| 149 | int padding = 0xabababab; |
| 150 | amt = write(fd, &padding, paddingLen); |
| 151 | if (amt != paddingLen) { |
| 152 | LOGW("write_snapshot_file error writing %d bytes of filename padding %s", |
| 153 | paddingLen, strerror(errno)); |
| 154 | return 1; |
| 155 | } |
| 156 | } |
| 157 | } |
| 158 | |
| 159 | return 0; |
| 160 | } |
| 161 | |
| 162 | static int |
| 163 | write_delete_file(const String8& key) |
| 164 | { |
Joe Onorato | 290bb01 | 2009-05-13 18:57:29 -0400 | [diff] [blame^] | 165 | LOGP("write_delete_file %s\n", key.string()); |
Joe Onorato | 3ad977b | 2009-05-05 11:50:51 -0700 | [diff] [blame] | 166 | return 0; |
| 167 | } |
| 168 | |
| 169 | static int |
| 170 | write_update_file(const String8& realFilename, const String8& key) |
| 171 | { |
Joe Onorato | 290bb01 | 2009-05-13 18:57:29 -0400 | [diff] [blame^] | 172 | LOGP("write_update_file %s (%s)\n", realFilename.string(), key.string()); |
Joe Onorato | 3ad977b | 2009-05-05 11:50:51 -0700 | [diff] [blame] | 173 | return 0; |
| 174 | } |
| 175 | |
| 176 | static int |
| 177 | compute_crc32(const String8& filename) |
| 178 | { |
| 179 | const int bufsize = 4*1024; |
| 180 | int amt; |
| 181 | |
| 182 | int fd = open(filename.string(), O_RDONLY); |
| 183 | if (fd == -1) { |
| 184 | return -1; |
| 185 | } |
| 186 | |
| 187 | char* buf = (char*)malloc(bufsize); |
| 188 | int crc = crc32(0L, Z_NULL, 0); |
| 189 | |
| 190 | while ((amt = read(fd, buf, bufsize)) != 0) { |
| 191 | crc = crc32(crc, (Bytef*)buf, amt); |
| 192 | } |
| 193 | |
| 194 | close(fd); |
| 195 | free(buf); |
| 196 | |
| 197 | return crc; |
| 198 | } |
| 199 | |
| 200 | int |
Joe Onorato | 290bb01 | 2009-05-13 18:57:29 -0400 | [diff] [blame^] | 201 | back_up_files(int oldSnapshotFD, int oldDataStream, int newSnapshotFD, |
Joe Onorato | 3ad977b | 2009-05-05 11:50:51 -0700 | [diff] [blame] | 202 | char const* fileBase, char const* const* files, int fileCount) |
| 203 | { |
| 204 | int err; |
| 205 | const String8 base(fileBase); |
| 206 | KeyedVector<String8,FileState> oldSnapshot; |
| 207 | KeyedVector<String8,FileState> newSnapshot; |
| 208 | |
| 209 | if (oldSnapshotFD != -1) { |
| 210 | err = read_snapshot_file(oldSnapshotFD, &oldSnapshot); |
| 211 | if (err != 0) { |
| 212 | // On an error, treat this as a full backup. |
| 213 | oldSnapshot.clear(); |
| 214 | } |
| 215 | } |
| 216 | |
| 217 | for (int i=0; i<fileCount; i++) { |
| 218 | String8 name(files[i]); |
| 219 | FileState s; |
| 220 | struct stat st; |
| 221 | String8 realFilename(base); |
| 222 | realFilename.appendPath(name); |
| 223 | |
| 224 | err = stat(realFilename.string(), &st); |
| 225 | if (err != 0) { |
| 226 | LOGW("Error stating file %s", realFilename.string()); |
| 227 | continue; |
| 228 | } |
| 229 | |
| 230 | s.modTime_sec = st.st_mtime; |
Joe Onorato | c825d3e | 2009-05-06 12:55:46 -0400 | [diff] [blame] | 231 | s.modTime_nsec = 0; // workaround sim breakage |
| 232 | //s.modTime_nsec = st.st_mtime_nsec; |
Joe Onorato | 3ad977b | 2009-05-05 11:50:51 -0700 | [diff] [blame] | 233 | s.size = st.st_size; |
| 234 | s.crc32 = compute_crc32(realFilename); |
| 235 | |
| 236 | newSnapshot.add(name, s); |
| 237 | } |
| 238 | |
| 239 | int n = 0; |
| 240 | int N = oldSnapshot.size(); |
| 241 | int m = 0; |
| 242 | |
| 243 | while (n<N && m<fileCount) { |
| 244 | const String8& p = oldSnapshot.keyAt(n); |
| 245 | const String8& q = newSnapshot.keyAt(m); |
| 246 | int cmp = p.compare(q); |
| 247 | if (cmp > 0) { |
| 248 | // file added |
| 249 | String8 realFilename(base); |
| 250 | realFilename.appendPath(q); |
| 251 | write_update_file(realFilename, q); |
| 252 | m++; |
| 253 | } |
| 254 | else if (cmp < 0) { |
| 255 | // file removed |
| 256 | write_delete_file(p); |
| 257 | n++; |
| 258 | } |
| 259 | else { |
| 260 | // both files exist, check them |
| 261 | String8 realFilename(base); |
| 262 | realFilename.appendPath(q); |
| 263 | const FileState& f = oldSnapshot.valueAt(n); |
| 264 | const FileState& g = newSnapshot.valueAt(m); |
| 265 | |
Joe Onorato | 290bb01 | 2009-05-13 18:57:29 -0400 | [diff] [blame^] | 266 | LOGP("%s\n", q.string()); |
| 267 | LOGP(" new: modTime=%d,%d size=%-3d crc32=0x%08x\n", |
Joe Onorato | 3ad977b | 2009-05-05 11:50:51 -0700 | [diff] [blame] | 268 | f.modTime_sec, f.modTime_nsec, f.size, f.crc32); |
Joe Onorato | 290bb01 | 2009-05-13 18:57:29 -0400 | [diff] [blame^] | 269 | LOGP(" old: modTime=%d,%d size=%-3d crc32=0x%08x\n", |
Joe Onorato | 3ad977b | 2009-05-05 11:50:51 -0700 | [diff] [blame] | 270 | g.modTime_sec, g.modTime_nsec, g.size, g.crc32); |
| 271 | if (f.modTime_sec != g.modTime_sec || f.modTime_nsec != g.modTime_nsec |
| 272 | || f.size != g.size || f.crc32 != g.crc32) { |
| 273 | write_update_file(realFilename, p); |
| 274 | } |
| 275 | n++; |
| 276 | m++; |
| 277 | } |
| 278 | } |
| 279 | |
| 280 | // these were deleted |
| 281 | while (n<N) { |
| 282 | write_delete_file(oldSnapshot.keyAt(n)); |
| 283 | n++; |
| 284 | } |
| 285 | |
| 286 | // these were added |
| 287 | while (m<fileCount) { |
| 288 | const String8& q = newSnapshot.keyAt(m); |
| 289 | String8 realFilename(base); |
| 290 | realFilename.appendPath(q); |
| 291 | write_update_file(realFilename, q); |
| 292 | m++; |
| 293 | } |
| 294 | |
| 295 | err = write_snapshot_file(newSnapshotFD, newSnapshot); |
| 296 | |
| 297 | return 0; |
| 298 | } |
| 299 | |
| 300 | #if TEST_BACKUP_HELPERS |
| 301 | |
| 302 | #define SCRATCH_DIR "/data/backup_helper_test/" |
| 303 | |
| 304 | static int |
| 305 | write_text_file(const char* path, const char* data) |
| 306 | { |
| 307 | int amt; |
| 308 | int fd; |
| 309 | int len; |
| 310 | |
| 311 | fd = creat(path, 0666); |
| 312 | if (fd == -1) { |
| 313 | fprintf(stderr, "creat %s failed\n", path); |
| 314 | return errno; |
| 315 | } |
| 316 | |
| 317 | len = strlen(data); |
| 318 | amt = write(fd, data, len); |
| 319 | if (amt != len) { |
| 320 | fprintf(stderr, "error (%s) writing to file %s\n", strerror(errno), path); |
| 321 | return errno; |
| 322 | } |
| 323 | |
| 324 | close(fd); |
| 325 | |
| 326 | return 0; |
| 327 | } |
| 328 | |
| 329 | static int |
| 330 | compare_file(const char* path, const unsigned char* data, int len) |
| 331 | { |
| 332 | int fd; |
| 333 | int amt; |
| 334 | |
| 335 | fd = open(path, O_RDONLY); |
| 336 | if (fd == -1) { |
| 337 | fprintf(stderr, "compare_file error (%s) opening %s\n", strerror(errno), path); |
| 338 | return errno; |
| 339 | } |
| 340 | |
| 341 | unsigned char* contents = (unsigned char*)malloc(len); |
| 342 | if (contents == NULL) { |
| 343 | fprintf(stderr, "malloc(%d) failed\n", len); |
| 344 | return ENOMEM; |
| 345 | } |
| 346 | |
| 347 | bool sizesMatch = true; |
| 348 | amt = lseek(fd, 0, SEEK_END); |
| 349 | if (amt != len) { |
| 350 | fprintf(stderr, "compare_file file length should be %d, was %d\n", len, amt); |
| 351 | sizesMatch = false; |
| 352 | } |
| 353 | lseek(fd, 0, SEEK_SET); |
| 354 | |
| 355 | int readLen = amt < len ? amt : len; |
| 356 | amt = read(fd, contents, readLen); |
| 357 | if (amt != readLen) { |
| 358 | fprintf(stderr, "compare_file read expected %d bytes but got %d\n", len, amt); |
| 359 | } |
| 360 | |
| 361 | bool contentsMatch = true; |
| 362 | for (int i=0; i<readLen; i++) { |
| 363 | if (data[i] != contents[i]) { |
| 364 | if (contentsMatch) { |
| 365 | fprintf(stderr, "compare_file contents are different: (index, expected, actual)\n"); |
| 366 | contentsMatch = false; |
| 367 | } |
| 368 | fprintf(stderr, " [%-2d] %02x %02x\n", i, data[i], contents[i]); |
| 369 | } |
| 370 | } |
| 371 | |
| 372 | return contentsMatch && sizesMatch ? 0 : 1; |
| 373 | } |
| 374 | |
| 375 | int |
| 376 | backup_helper_test_empty() |
| 377 | { |
| 378 | int err; |
| 379 | int fd; |
| 380 | KeyedVector<String8,FileState> snapshot; |
| 381 | const char* filename = SCRATCH_DIR "backup_helper_test_empty.snap"; |
| 382 | |
| 383 | system("rm -r " SCRATCH_DIR); |
| 384 | mkdir(SCRATCH_DIR, 0777); |
| 385 | |
| 386 | // write |
| 387 | fd = creat(filename, 0666); |
| 388 | if (fd == -1) { |
| 389 | fprintf(stderr, "error creating %s\n", filename); |
| 390 | return 1; |
| 391 | } |
| 392 | |
| 393 | err = write_snapshot_file(fd, snapshot); |
| 394 | |
| 395 | close(fd); |
| 396 | |
| 397 | if (err != 0) { |
| 398 | fprintf(stderr, "write_snapshot_file reported error %d (%s)\n", err, strerror(err)); |
| 399 | return err; |
| 400 | } |
| 401 | |
| 402 | static const unsigned char correct_data[] = { |
| 403 | 0x53, 0x6e, 0x61, 0x70, 0x00, 0x00, 0x00, 0x00, |
| 404 | 0x46, 0x69, 0x6c, 0x65, 0x10, 0x00, 0x00, 0x00 |
| 405 | }; |
| 406 | |
| 407 | err = compare_file(filename, correct_data, sizeof(correct_data)); |
| 408 | if (err != 0) { |
| 409 | return err; |
| 410 | } |
| 411 | |
| 412 | // read |
| 413 | fd = open(filename, O_RDONLY); |
| 414 | if (fd == -1) { |
| 415 | fprintf(stderr, "error opening for read %s\n", filename); |
| 416 | return 1; |
| 417 | } |
| 418 | |
| 419 | KeyedVector<String8,FileState> readSnapshot; |
| 420 | err = read_snapshot_file(fd, &readSnapshot); |
| 421 | if (err != 0) { |
| 422 | fprintf(stderr, "read_snapshot_file failed %d\n", err); |
| 423 | return err; |
| 424 | } |
| 425 | |
| 426 | if (readSnapshot.size() != 0) { |
| 427 | fprintf(stderr, "readSnapshot should be length 0\n"); |
| 428 | return 1; |
| 429 | } |
| 430 | |
| 431 | return 0; |
| 432 | } |
| 433 | |
| 434 | int |
| 435 | backup_helper_test_four() |
| 436 | { |
| 437 | int err; |
| 438 | int fd; |
| 439 | KeyedVector<String8,FileState> snapshot; |
| 440 | const char* filename = SCRATCH_DIR "backup_helper_test_four.snap"; |
| 441 | |
| 442 | system("rm -r " SCRATCH_DIR); |
| 443 | mkdir(SCRATCH_DIR, 0777); |
| 444 | |
| 445 | // write |
| 446 | fd = creat(filename, 0666); |
| 447 | if (fd == -1) { |
| 448 | fprintf(stderr, "error opening %s\n", filename); |
| 449 | return 1; |
| 450 | } |
| 451 | |
| 452 | String8 filenames[4]; |
| 453 | FileState states[4]; |
| 454 | |
| 455 | states[0].modTime_sec = 0xfedcba98; |
| 456 | states[0].modTime_nsec = 0xdeadbeef; |
| 457 | states[0].size = 0xababbcbc; |
| 458 | states[0].crc32 = 0x12345678; |
| 459 | states[0].nameLen = -12; |
| 460 | filenames[0] = String8("bytes_of_padding"); |
| 461 | snapshot.add(filenames[0], states[0]); |
| 462 | |
| 463 | states[1].modTime_sec = 0x93400031; |
| 464 | states[1].modTime_nsec = 0xdeadbeef; |
| 465 | states[1].size = 0x88557766; |
| 466 | states[1].crc32 = 0x22334422; |
| 467 | states[1].nameLen = -1; |
| 468 | filenames[1] = String8("bytes_of_padding3"); |
| 469 | snapshot.add(filenames[1], states[1]); |
| 470 | |
| 471 | states[2].modTime_sec = 0x33221144; |
| 472 | states[2].modTime_nsec = 0xdeadbeef; |
| 473 | states[2].size = 0x11223344; |
| 474 | states[2].crc32 = 0x01122334; |
| 475 | states[2].nameLen = 0; |
| 476 | filenames[2] = String8("bytes_of_padding_2"); |
| 477 | snapshot.add(filenames[2], states[2]); |
| 478 | |
| 479 | states[3].modTime_sec = 0x33221144; |
| 480 | states[3].modTime_nsec = 0xdeadbeef; |
| 481 | states[3].size = 0x11223344; |
| 482 | states[3].crc32 = 0x01122334; |
| 483 | states[3].nameLen = 0; |
| 484 | filenames[3] = String8("bytes_of_padding__1"); |
| 485 | snapshot.add(filenames[3], states[3]); |
| 486 | |
| 487 | err = write_snapshot_file(fd, snapshot); |
| 488 | |
| 489 | close(fd); |
| 490 | |
| 491 | if (err != 0) { |
| 492 | fprintf(stderr, "write_snapshot_file reported error %d (%s)\n", err, strerror(err)); |
| 493 | return err; |
| 494 | } |
| 495 | |
| 496 | static const unsigned char correct_data[] = { |
| 497 | // header |
| 498 | 0x53, 0x6e, 0x61, 0x70, 0x04, 0x00, 0x00, 0x00, |
| 499 | 0x46, 0x69, 0x6c, 0x65, 0xac, 0x00, 0x00, 0x00, |
| 500 | |
| 501 | // bytes_of_padding |
| 502 | 0x98, 0xba, 0xdc, 0xfe, 0xef, 0xbe, 0xad, 0xde, |
| 503 | 0xbc, 0xbc, 0xab, 0xab, 0x78, 0x56, 0x34, 0x12, |
| 504 | 0x10, 0x00, 0x00, 0x00, 0x62, 0x79, 0x74, 0x65, |
| 505 | 0x73, 0x5f, 0x6f, 0x66, 0x5f, 0x70, 0x61, 0x64, |
| 506 | 0x64, 0x69, 0x6e, 0x67, |
| 507 | |
| 508 | // bytes_of_padding3 |
| 509 | 0x31, 0x00, 0x40, 0x93, 0xef, 0xbe, 0xad, 0xde, |
| 510 | 0x66, 0x77, 0x55, 0x88, 0x22, 0x44, 0x33, 0x22, |
| 511 | 0x11, 0x00, 0x00, 0x00, 0x62, 0x79, 0x74, 0x65, |
| 512 | 0x73, 0x5f, 0x6f, 0x66, 0x5f, 0x70, 0x61, 0x64, |
| 513 | 0x64, 0x69, 0x6e, 0x67, 0x33, 0xab, 0xab, 0xab, |
| 514 | |
| 515 | // bytes of padding2 |
| 516 | 0x44, 0x11, 0x22, 0x33, 0xef, 0xbe, 0xad, 0xde, |
| 517 | 0x44, 0x33, 0x22, 0x11, 0x34, 0x23, 0x12, 0x01, |
| 518 | 0x12, 0x00, 0x00, 0x00, 0x62, 0x79, 0x74, 0x65, |
| 519 | 0x73, 0x5f, 0x6f, 0x66, 0x5f, 0x70, 0x61, 0x64, |
| 520 | 0x64, 0x69, 0x6e, 0x67, 0x5f, 0x32, 0xab, 0xab, |
| 521 | |
| 522 | // bytes of padding3 |
| 523 | 0x44, 0x11, 0x22, 0x33, 0xef, 0xbe, 0xad, 0xde, |
| 524 | 0x44, 0x33, 0x22, 0x11, 0x34, 0x23, 0x12, 0x01, |
| 525 | 0x13, 0x00, 0x00, 0x00, 0x62, 0x79, 0x74, 0x65, |
| 526 | 0x73, 0x5f, 0x6f, 0x66, 0x5f, 0x70, 0x61, 0x64, |
| 527 | 0x64, 0x69, 0x6e, 0x67, 0x5f, 0x5f, 0x31, 0xab |
| 528 | }; |
| 529 | |
| 530 | err = compare_file(filename, correct_data, sizeof(correct_data)); |
| 531 | if (err != 0) { |
| 532 | return err; |
| 533 | } |
| 534 | |
| 535 | // read |
| 536 | fd = open(filename, O_RDONLY); |
| 537 | if (fd == -1) { |
| 538 | fprintf(stderr, "error opening for read %s\n", filename); |
| 539 | return 1; |
| 540 | } |
| 541 | |
| 542 | |
| 543 | KeyedVector<String8,FileState> readSnapshot; |
| 544 | err = read_snapshot_file(fd, &readSnapshot); |
| 545 | if (err != 0) { |
| 546 | fprintf(stderr, "read_snapshot_file failed %d\n", err); |
| 547 | return err; |
| 548 | } |
| 549 | |
| 550 | if (readSnapshot.size() != 4) { |
| 551 | fprintf(stderr, "readSnapshot should be length 4 is %d\n", readSnapshot.size()); |
| 552 | return 1; |
| 553 | } |
| 554 | |
| 555 | bool matched = true; |
| 556 | for (size_t i=0; i<readSnapshot.size(); i++) { |
| 557 | const String8& name = readSnapshot.keyAt(i); |
| 558 | const FileState state = readSnapshot.valueAt(i); |
| 559 | |
| 560 | if (name != filenames[i] || states[i].modTime_sec != state.modTime_sec |
| 561 | || states[i].modTime_nsec != state.modTime_nsec |
| 562 | || states[i].size != state.size || states[i].crc32 != states[i].crc32) { |
| 563 | fprintf(stderr, "state %d expected={%d/%d, 0x%08x, 0x%08x, %3d} '%s'\n" |
| 564 | " actual={%d/%d, 0x%08x, 0x%08x, %3d} '%s'\n", i, |
| 565 | states[i].modTime_sec, states[i].modTime_nsec, states[i].size, states[i].crc32, |
| 566 | name.length(), filenames[i].string(), |
| 567 | state.modTime_sec, state.modTime_nsec, state.size, state.crc32, state.nameLen, |
| 568 | name.string()); |
| 569 | matched = false; |
| 570 | } |
| 571 | } |
| 572 | |
| 573 | return matched ? 0 : 1; |
| 574 | } |
| 575 | |
| 576 | static int |
| 577 | get_mod_time(const char* filename, struct timeval times[2]) |
| 578 | { |
| 579 | int err; |
| 580 | struct stat64 st; |
| 581 | err = stat64(filename, &st); |
| 582 | if (err != 0) { |
| 583 | fprintf(stderr, "stat '%s' failed: %s\n", filename, strerror(errno)); |
| 584 | return errno; |
| 585 | } |
| 586 | times[0].tv_sec = st.st_atime; |
| 587 | times[0].tv_usec = st.st_atime_nsec / 1000; |
| 588 | times[1].tv_sec = st.st_mtime; |
| 589 | times[1].tv_usec = st.st_mtime_nsec / 1000; |
| 590 | return 0; |
| 591 | } |
| 592 | |
| 593 | int |
| 594 | backup_helper_test_files() |
| 595 | { |
| 596 | int err; |
| 597 | int newSnapshotFD; |
| 598 | int oldSnapshotFD; |
| 599 | |
| 600 | system("rm -r " SCRATCH_DIR); |
| 601 | mkdir(SCRATCH_DIR, 0777); |
| 602 | mkdir(SCRATCH_DIR "data", 0777); |
| 603 | |
| 604 | write_text_file(SCRATCH_DIR "data/b", "b\nbb\n"); |
| 605 | write_text_file(SCRATCH_DIR "data/c", "c\ncc\n"); |
| 606 | write_text_file(SCRATCH_DIR "data/d", "d\ndd\n"); |
| 607 | write_text_file(SCRATCH_DIR "data/e", "e\nee\n"); |
| 608 | write_text_file(SCRATCH_DIR "data/f", "f\nff\n"); |
| 609 | write_text_file(SCRATCH_DIR "data/h", "h\nhh\n"); |
| 610 | |
| 611 | char const* files_before[] = { |
| 612 | "data/b", |
| 613 | "data/c", |
| 614 | "data/d", |
| 615 | "data/e", |
| 616 | "data/f" |
| 617 | }; |
| 618 | |
| 619 | newSnapshotFD = creat(SCRATCH_DIR "before.snap", 0666); |
| 620 | if (newSnapshotFD == -1) { |
| 621 | fprintf(stderr, "error creating: %s\n", strerror(errno)); |
| 622 | return errno; |
| 623 | } |
| 624 | |
| 625 | err = back_up_files(-1, newSnapshotFD, 0, SCRATCH_DIR, files_before, 5); |
| 626 | if (err != 0) { |
| 627 | return err; |
| 628 | } |
| 629 | |
| 630 | close(newSnapshotFD); |
| 631 | |
| 632 | sleep(3); |
| 633 | |
| 634 | struct timeval d_times[2]; |
| 635 | struct timeval e_times[2]; |
| 636 | |
| 637 | err = get_mod_time(SCRATCH_DIR "data/d", d_times); |
| 638 | err |= get_mod_time(SCRATCH_DIR "data/e", e_times); |
| 639 | if (err != 0) { |
| 640 | return err; |
| 641 | } |
| 642 | |
| 643 | write_text_file(SCRATCH_DIR "data/a", "a\naa\n"); |
| 644 | unlink(SCRATCH_DIR "data/c"); |
| 645 | write_text_file(SCRATCH_DIR "data/c", "c\ncc\n"); |
| 646 | write_text_file(SCRATCH_DIR "data/d", "dd\ndd\n"); |
| 647 | utimes(SCRATCH_DIR "data/d", d_times); |
| 648 | write_text_file(SCRATCH_DIR "data/e", "z\nzz\n"); |
| 649 | utimes(SCRATCH_DIR "data/e", e_times); |
| 650 | write_text_file(SCRATCH_DIR "data/g", "g\ngg\n"); |
| 651 | unlink(SCRATCH_DIR "data/f"); |
| 652 | |
| 653 | char const* files_after[] = { |
| 654 | "data/a", // added |
| 655 | "data/b", // same |
| 656 | "data/c", // different mod time |
| 657 | "data/d", // different size (same mod time) |
| 658 | "data/e", // different contents (same mod time, same size) |
| 659 | "data/g" // added |
| 660 | }; |
| 661 | |
| 662 | oldSnapshotFD = open(SCRATCH_DIR "before.snap", O_RDONLY); |
| 663 | if (oldSnapshotFD == -1) { |
| 664 | fprintf(stderr, "error opening: %s\n", strerror(errno)); |
| 665 | return errno; |
| 666 | } |
| 667 | |
| 668 | newSnapshotFD = creat(SCRATCH_DIR "after.snap", 0666); |
| 669 | if (newSnapshotFD == -1) { |
| 670 | fprintf(stderr, "error creating: %s\n", strerror(errno)); |
| 671 | return errno; |
| 672 | } |
| 673 | |
| 674 | err = back_up_files(oldSnapshotFD, newSnapshotFD, 0, SCRATCH_DIR, files_after, 6); |
| 675 | if (err != 0) { |
| 676 | return err; |
| 677 | } |
| 678 | |
| 679 | close(oldSnapshotFD); |
| 680 | close(newSnapshotFD); |
| 681 | |
| 682 | return 0; |
| 683 | } |
| 684 | |
| 685 | #endif // TEST_BACKUP_HELPERS |