1 /*- 2 * Copyright (c) 2003-2007 Tim Kientzle 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR 15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 17 * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT, 18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #include "archive_platform.h" 27 __FBSDID("$FreeBSD: src/lib/libarchive/archive_read_support_format_cpio.c,v 1.27 2008/12/06 06:45:15 kientzle Exp $"); 28 29 #ifdef HAVE_ERRNO_H 30 #include <errno.h> 31 #endif 32 /* #include <stdint.h> */ /* See archive_platform.h */ 33 #ifdef HAVE_STDLIB_H 34 #include <stdlib.h> 35 #endif 36 #ifdef HAVE_STRING_H 37 #include <string.h> 38 #endif 39 40 #include "archive.h" 41 #include "archive_entry.h" 42 #include "archive_private.h" 43 #include "archive_read_private.h" 44 45 struct cpio_bin_header { 46 unsigned char c_magic[2]; 47 unsigned char c_dev[2]; 48 unsigned char c_ino[2]; 49 unsigned char c_mode[2]; 50 unsigned char c_uid[2]; 51 unsigned char c_gid[2]; 52 unsigned char c_nlink[2]; 53 unsigned char c_rdev[2]; 54 unsigned char c_mtime[4]; 55 unsigned char c_namesize[2]; 56 unsigned char c_filesize[4]; 57 }; 58 59 struct cpio_odc_header { 60 char c_magic[6]; 61 char c_dev[6]; 62 char c_ino[6]; 63 char c_mode[6]; 64 char c_uid[6]; 65 char c_gid[6]; 66 char c_nlink[6]; 67 char c_rdev[6]; 68 char c_mtime[11]; 69 char c_namesize[6]; 70 char c_filesize[11]; 71 }; 72 73 struct cpio_newc_header { 74 char c_magic[6]; 75 char c_ino[8]; 76 char c_mode[8]; 77 char c_uid[8]; 78 char c_gid[8]; 79 char c_nlink[8]; 80 char c_mtime[8]; 81 char c_filesize[8]; 82 char c_devmajor[8]; 83 char c_devminor[8]; 84 char c_rdevmajor[8]; 85 char c_rdevminor[8]; 86 char c_namesize[8]; 87 char c_crc[8]; 88 }; 89 90 struct links_entry { 91 struct links_entry *next; 92 struct links_entry *previous; 93 int links; 94 dev_t dev; 95 ino_t ino; 96 char *name; 97 }; 98 99 #define CPIO_MAGIC 0x13141516 100 struct cpio { 101 int magic; 102 int (*read_header)(struct archive_read *, struct cpio *, 103 struct archive_entry *, size_t *, size_t *); 104 struct links_entry *links_head; 105 struct archive_string entry_name; 106 struct archive_string entry_linkname; 107 off_t entry_bytes_remaining; 108 off_t entry_offset; 109 off_t entry_padding; 110 }; 111 112 static int64_t atol16(const char *, unsigned); 113 static int64_t atol8(const char *, unsigned); 114 static int archive_read_format_cpio_bid(struct archive_read *); 115 static int archive_read_format_cpio_cleanup(struct archive_read *); 116 static int archive_read_format_cpio_read_data(struct archive_read *, 117 const void **, size_t *, off_t *); 118 static int archive_read_format_cpio_read_header(struct archive_read *, 119 struct archive_entry *); 120 static int be4(const unsigned char *); 121 static int find_odc_header(struct archive_read *); 122 static int find_newc_header(struct archive_read *); 123 static int header_bin_be(struct archive_read *, struct cpio *, 124 struct archive_entry *, size_t *, size_t *); 125 static int header_bin_le(struct archive_read *, struct cpio *, 126 struct archive_entry *, size_t *, size_t *); 127 static int header_newc(struct archive_read *, struct cpio *, 128 struct archive_entry *, size_t *, size_t *); 129 static int header_odc(struct archive_read *, struct cpio *, 130 struct archive_entry *, size_t *, size_t *); 131 static int is_octal(const char *, size_t); 132 static int is_hex(const char *, size_t); 133 static int le4(const unsigned char *); 134 static void record_hardlink(struct cpio *cpio, struct archive_entry *entry); 135 136 int 137 archive_read_support_format_cpio(struct archive *_a) 138 { 139 struct archive_read *a = (struct archive_read *)_a; 140 struct cpio *cpio; 141 int r; 142 143 cpio = (struct cpio *)malloc(sizeof(*cpio)); 144 if (cpio == NULL) { 145 archive_set_error(&a->archive, ENOMEM, "Can't allocate cpio data"); 146 return (ARCHIVE_FATAL); 147 } 148 memset(cpio, 0, sizeof(*cpio)); 149 cpio->magic = CPIO_MAGIC; 150 151 r = __archive_read_register_format(a, 152 cpio, 153 "cpio", 154 archive_read_format_cpio_bid, 155 NULL, 156 archive_read_format_cpio_read_header, 157 archive_read_format_cpio_read_data, 158 NULL, 159 archive_read_format_cpio_cleanup); 160 161 if (r != ARCHIVE_OK) 162 free(cpio); 163 return (ARCHIVE_OK); 164 } 165 166 167 static int 168 archive_read_format_cpio_bid(struct archive_read *a) 169 { 170 const void *h; 171 const unsigned char *p; 172 struct cpio *cpio; 173 int bid; 174 175 cpio = (struct cpio *)(a->format->data); 176 177 if ((h = __archive_read_ahead(a, 6, NULL)) == NULL) 178 return (-1); 179 180 p = (const unsigned char *)h; 181 bid = 0; 182 if (memcmp(p, "070707", 6) == 0) { 183 /* ASCII cpio archive (odc, POSIX.1) */ 184 cpio->read_header = header_odc; 185 bid += 48; 186 /* 187 * XXX TODO: More verification; Could check that only octal 188 * digits appear in appropriate header locations. XXX 189 */ 190 } else if (memcmp(p, "070701", 6) == 0) { 191 /* ASCII cpio archive (SVR4 without CRC) */ 192 cpio->read_header = header_newc; 193 bid += 48; 194 /* 195 * XXX TODO: More verification; Could check that only hex 196 * digits appear in appropriate header locations. XXX 197 */ 198 } else if (memcmp(p, "070702", 6) == 0) { 199 /* ASCII cpio archive (SVR4 with CRC) */ 200 /* XXX TODO: Flag that we should check the CRC. XXX */ 201 cpio->read_header = header_newc; 202 bid += 48; 203 /* 204 * XXX TODO: More verification; Could check that only hex 205 * digits appear in appropriate header locations. XXX 206 */ 207 } else if (p[0] * 256 + p[1] == 070707) { 208 /* big-endian binary cpio archives */ 209 cpio->read_header = header_bin_be; 210 bid += 16; 211 /* Is more verification possible here? */ 212 } else if (p[0] + p[1] * 256 == 070707) { 213 /* little-endian binary cpio archives */ 214 cpio->read_header = header_bin_le; 215 bid += 16; 216 /* Is more verification possible here? */ 217 } else 218 return (ARCHIVE_WARN); 219 220 return (bid); 221 } 222 223 static int 224 archive_read_format_cpio_read_header(struct archive_read *a, 225 struct archive_entry *entry) 226 { 227 struct cpio *cpio; 228 const void *h; 229 size_t namelength; 230 size_t name_pad; 231 int r; 232 233 cpio = (struct cpio *)(a->format->data); 234 r = (cpio->read_header(a, cpio, entry, &namelength, &name_pad)); 235 236 if (r < ARCHIVE_WARN) 237 return (r); 238 239 /* Read name from buffer. */ 240 h = __archive_read_ahead(a, namelength + name_pad, NULL); 241 if (h == NULL) 242 return (ARCHIVE_FATAL); 243 __archive_read_consume(a, namelength + name_pad); 244 archive_strncpy(&cpio->entry_name, (const char *)h, namelength); 245 archive_entry_set_pathname(entry, cpio->entry_name.s); 246 cpio->entry_offset = 0; 247 248 /* If this is a symlink, read the link contents. */ 249 if (archive_entry_filetype(entry) == AE_IFLNK) { 250 h = __archive_read_ahead(a, cpio->entry_bytes_remaining, NULL); 251 if (h == NULL) 252 return (ARCHIVE_FATAL); 253 __archive_read_consume(a, cpio->entry_bytes_remaining); 254 archive_strncpy(&cpio->entry_linkname, (const char *)h, 255 cpio->entry_bytes_remaining); 256 archive_entry_set_symlink(entry, cpio->entry_linkname.s); 257 cpio->entry_bytes_remaining = 0; 258 } 259 260 /* Compare name to "TRAILER!!!" to test for end-of-archive. */ 261 if (namelength == 11 && strcmp((const char *)h, "TRAILER!!!") == 0) { 262 /* TODO: Store file location of start of block. */ 263 archive_set_error(&a->archive, 0, NULL); 264 return (ARCHIVE_EOF); 265 } 266 267 /* Detect and record hardlinks to previously-extracted entries. */ 268 record_hardlink(cpio, entry); 269 270 return (r); 271 } 272 273 static int 274 archive_read_format_cpio_read_data(struct archive_read *a, 275 const void **buff, size_t *size, off_t *offset) 276 { 277 ssize_t bytes_read; 278 struct cpio *cpio; 279 280 cpio = (struct cpio *)(a->format->data); 281 if (cpio->entry_bytes_remaining > 0) { 282 *buff = __archive_read_ahead(a, 1, &bytes_read); 283 if (bytes_read <= 0) 284 return (ARCHIVE_FATAL); 285 if (bytes_read > cpio->entry_bytes_remaining) 286 bytes_read = cpio->entry_bytes_remaining; 287 *size = bytes_read; 288 *offset = cpio->entry_offset; 289 cpio->entry_offset += bytes_read; 290 cpio->entry_bytes_remaining -= bytes_read; 291 __archive_read_consume(a, bytes_read); 292 return (ARCHIVE_OK); 293 } else { 294 while (cpio->entry_padding > 0) { 295 *buff = __archive_read_ahead(a, 1, &bytes_read); 296 if (bytes_read <= 0) 297 return (ARCHIVE_FATAL); 298 if (bytes_read > cpio->entry_padding) 299 bytes_read = cpio->entry_padding; 300 __archive_read_consume(a, bytes_read); 301 cpio->entry_padding -= bytes_read; 302 } 303 *buff = NULL; 304 *size = 0; 305 *offset = cpio->entry_offset; 306 return (ARCHIVE_EOF); 307 } 308 } 309 310 /* 311 * Skip forward to the next cpio newc header by searching for the 312 * 07070[12] string. This should be generalized and merged with 313 * find_odc_header below. 314 */ 315 static int 316 is_hex(const char *p, size_t len) 317 { 318 while (len-- > 0) { 319 if ((*p >= '0' && *p <= '9') 320 || (*p >= 'a' && *p <= 'f') 321 || (*p >= 'A' && *p <= 'F')) 322 ++p; 323 else 324 return (0); 325 } 326 return (1); 327 } 328 329 static int 330 find_newc_header(struct archive_read *a) 331 { 332 const void *h; 333 const char *p, *q; 334 size_t skip, skipped = 0; 335 ssize_t bytes; 336 337 for (;;) { 338 h = __archive_read_ahead(a, sizeof(struct cpio_newc_header), &bytes); 339 if (h == NULL) 340 return (ARCHIVE_FATAL); 341 p = h; 342 q = p + bytes; 343 344 /* Try the typical case first, then go into the slow search.*/ 345 if (memcmp("07070", p, 5) == 0 346 && (p[5] == '1' || p[5] == '2') 347 && is_hex(p, sizeof(struct cpio_newc_header))) 348 return (ARCHIVE_OK); 349 350 /* 351 * Scan ahead until we find something that looks 352 * like an odc header. 353 */ 354 while (p + sizeof(struct cpio_newc_header) < q) { 355 switch (p[5]) { 356 case '1': 357 case '2': 358 if (memcmp("07070", p, 5) == 0 359 && is_hex(p, sizeof(struct cpio_newc_header))) { 360 skip = p - (const char *)h; 361 __archive_read_consume(a, skip); 362 skipped += skip; 363 if (skipped > 0) { 364 archive_set_error(&a->archive, 365 0, 366 "Skipped %d bytes before " 367 "finding valid header", 368 (int)skipped); 369 return (ARCHIVE_WARN); 370 } 371 return (ARCHIVE_OK); 372 } 373 p += 2; 374 break; 375 case '0': 376 p++; 377 break; 378 default: 379 p += 6; 380 break; 381 } 382 } 383 skip = p - (const char *)h; 384 __archive_read_consume(a, skip); 385 skipped += skip; 386 } 387 } 388 389 static int 390 header_newc(struct archive_read *a, struct cpio *cpio, 391 struct archive_entry *entry, size_t *namelength, size_t *name_pad) 392 { 393 const void *h; 394 const struct cpio_newc_header *header; 395 int r; 396 397 r = find_newc_header(a); 398 if (r < ARCHIVE_WARN) 399 return (r); 400 401 /* Read fixed-size portion of header. */ 402 h = __archive_read_ahead(a, sizeof(struct cpio_newc_header), NULL); 403 if (h == NULL) 404 return (ARCHIVE_FATAL); 405 __archive_read_consume(a, sizeof(struct cpio_newc_header)); 406 407 /* Parse out hex fields. */ 408 header = (const struct cpio_newc_header *)h; 409 410 if (memcmp(header->c_magic, "070701", 6) == 0) { 411 a->archive.archive_format = ARCHIVE_FORMAT_CPIO_SVR4_NOCRC; 412 a->archive.archive_format_name = "ASCII cpio (SVR4 with no CRC)"; 413 } else if (memcmp(header->c_magic, "070702", 6) == 0) { 414 a->archive.archive_format = ARCHIVE_FORMAT_CPIO_SVR4_CRC; 415 a->archive.archive_format_name = "ASCII cpio (SVR4 with CRC)"; 416 } else { 417 /* TODO: Abort here? */ 418 } 419 420 archive_entry_set_devmajor(entry, atol16(header->c_devmajor, sizeof(header->c_devmajor))); 421 archive_entry_set_devminor(entry, atol16(header->c_devminor, sizeof(header->c_devminor))); 422 archive_entry_set_ino(entry, atol16(header->c_ino, sizeof(header->c_ino))); 423 archive_entry_set_mode(entry, atol16(header->c_mode, sizeof(header->c_mode))); 424 archive_entry_set_uid(entry, atol16(header->c_uid, sizeof(header->c_uid))); 425 archive_entry_set_gid(entry, atol16(header->c_gid, sizeof(header->c_gid))); 426 archive_entry_set_nlink(entry, atol16(header->c_nlink, sizeof(header->c_nlink))); 427 archive_entry_set_rdevmajor(entry, atol16(header->c_rdevmajor, sizeof(header->c_rdevmajor))); 428 archive_entry_set_rdevminor(entry, atol16(header->c_rdevminor, sizeof(header->c_rdevminor))); 429 archive_entry_set_mtime(entry, atol16(header->c_mtime, sizeof(header->c_mtime)), 0); 430 *namelength = atol16(header->c_namesize, sizeof(header->c_namesize)); 431 /* Pad name to 2 more than a multiple of 4. */ 432 *name_pad = (2 - *namelength) & 3; 433 434 /* 435 * Note: entry_bytes_remaining is at least 64 bits and 436 * therefore guaranteed to be big enough for a 33-bit file 437 * size. 438 */ 439 cpio->entry_bytes_remaining = 440 atol16(header->c_filesize, sizeof(header->c_filesize)); 441 archive_entry_set_size(entry, cpio->entry_bytes_remaining); 442 /* Pad file contents to a multiple of 4. */ 443 cpio->entry_padding = 3 & -cpio->entry_bytes_remaining; 444 return (r); 445 } 446 447 /* 448 * Skip forward to the next cpio odc header by searching for the 449 * 070707 string. This is a hand-optimized search that could 450 * probably be easily generalized to handle all character-based 451 * cpio variants. 452 */ 453 static int 454 is_octal(const char *p, size_t len) 455 { 456 while (len-- > 0) { 457 if (*p < '0' || *p > '7') 458 return (0); 459 ++p; 460 } 461 return (1); 462 } 463 464 static int 465 find_odc_header(struct archive_read *a) 466 { 467 const void *h; 468 const char *p, *q; 469 size_t skip, skipped = 0; 470 ssize_t bytes; 471 472 for (;;) { 473 h = __archive_read_ahead(a, sizeof(struct cpio_odc_header), &bytes); 474 if (h == NULL) 475 return (ARCHIVE_FATAL); 476 p = h; 477 q = p + bytes; 478 479 /* Try the typical case first, then go into the slow search.*/ 480 if (memcmp("070707", p, 6) == 0 481 && is_octal(p, sizeof(struct cpio_odc_header))) 482 return (ARCHIVE_OK); 483 484 /* 485 * Scan ahead until we find something that looks 486 * like an odc header. 487 */ 488 while (p + sizeof(struct cpio_odc_header) < q) { 489 switch (p[5]) { 490 case '7': 491 if (memcmp("070707", p, 6) == 0 492 && is_octal(p, sizeof(struct cpio_odc_header))) { 493 skip = p - (const char *)h; 494 __archive_read_consume(a, skip); 495 skipped += skip; 496 if (skipped > 0) { 497 archive_set_error(&a->archive, 498 0, 499 "Skipped %d bytes before " 500 "finding valid header", 501 (int)skipped); 502 return (ARCHIVE_WARN); 503 } 504 return (ARCHIVE_OK); 505 } 506 p += 2; 507 break; 508 case '0': 509 p++; 510 break; 511 default: 512 p += 6; 513 break; 514 } 515 } 516 skip = p - (const char *)h; 517 __archive_read_consume(a, skip); 518 skipped += skip; 519 } 520 } 521 522 static int 523 header_odc(struct archive_read *a, struct cpio *cpio, 524 struct archive_entry *entry, size_t *namelength, size_t *name_pad) 525 { 526 const void *h; 527 int r; 528 const struct cpio_odc_header *header; 529 530 a->archive.archive_format = ARCHIVE_FORMAT_CPIO_POSIX; 531 a->archive.archive_format_name = "POSIX octet-oriented cpio"; 532 533 /* Find the start of the next header. */ 534 r = find_odc_header(a); 535 if (r < ARCHIVE_WARN) 536 return (r); 537 538 /* Read fixed-size portion of header. */ 539 h = __archive_read_ahead(a, sizeof(struct cpio_odc_header), NULL); 540 if (h == NULL) 541 return (ARCHIVE_FATAL); 542 __archive_read_consume(a, sizeof(struct cpio_odc_header)); 543 544 /* Parse out octal fields. */ 545 header = (const struct cpio_odc_header *)h; 546 547 archive_entry_set_dev(entry, atol8(header->c_dev, sizeof(header->c_dev))); 548 archive_entry_set_ino(entry, atol8(header->c_ino, sizeof(header->c_ino))); 549 archive_entry_set_mode(entry, atol8(header->c_mode, sizeof(header->c_mode))); 550 archive_entry_set_uid(entry, atol8(header->c_uid, sizeof(header->c_uid))); 551 archive_entry_set_gid(entry, atol8(header->c_gid, sizeof(header->c_gid))); 552 archive_entry_set_nlink(entry, atol8(header->c_nlink, sizeof(header->c_nlink))); 553 archive_entry_set_rdev(entry, atol8(header->c_rdev, sizeof(header->c_rdev))); 554 archive_entry_set_mtime(entry, atol8(header->c_mtime, sizeof(header->c_mtime)), 0); 555 *namelength = atol8(header->c_namesize, sizeof(header->c_namesize)); 556 *name_pad = 0; /* No padding of filename. */ 557 558 /* 559 * Note: entry_bytes_remaining is at least 64 bits and 560 * therefore guaranteed to be big enough for a 33-bit file 561 * size. 562 */ 563 cpio->entry_bytes_remaining = 564 atol8(header->c_filesize, sizeof(header->c_filesize)); 565 archive_entry_set_size(entry, cpio->entry_bytes_remaining); 566 cpio->entry_padding = 0; 567 return (r); 568 } 569 570 static int 571 header_bin_le(struct archive_read *a, struct cpio *cpio, 572 struct archive_entry *entry, size_t *namelength, size_t *name_pad) 573 { 574 const void *h; 575 const struct cpio_bin_header *header; 576 577 a->archive.archive_format = ARCHIVE_FORMAT_CPIO_BIN_LE; 578 a->archive.archive_format_name = "cpio (little-endian binary)"; 579 580 /* Read fixed-size portion of header. */ 581 h = __archive_read_ahead(a, sizeof(struct cpio_bin_header), NULL); 582 if (h == NULL) 583 return (ARCHIVE_FATAL); 584 __archive_read_consume(a, sizeof(struct cpio_bin_header)); 585 586 /* Parse out binary fields. */ 587 header = (const struct cpio_bin_header *)h; 588 589 archive_entry_set_dev(entry, header->c_dev[0] + header->c_dev[1] * 256); 590 archive_entry_set_ino(entry, header->c_ino[0] + header->c_ino[1] * 256); 591 archive_entry_set_mode(entry, header->c_mode[0] + header->c_mode[1] * 256); 592 archive_entry_set_uid(entry, header->c_uid[0] + header->c_uid[1] * 256); 593 archive_entry_set_gid(entry, header->c_gid[0] + header->c_gid[1] * 256); 594 archive_entry_set_nlink(entry, header->c_nlink[0] + header->c_nlink[1] * 256); 595 archive_entry_set_rdev(entry, header->c_rdev[0] + header->c_rdev[1] * 256); 596 archive_entry_set_mtime(entry, le4(header->c_mtime), 0); 597 *namelength = header->c_namesize[0] + header->c_namesize[1] * 256; 598 *name_pad = *namelength & 1; /* Pad to even. */ 599 600 cpio->entry_bytes_remaining = le4(header->c_filesize); 601 archive_entry_set_size(entry, cpio->entry_bytes_remaining); 602 cpio->entry_padding = cpio->entry_bytes_remaining & 1; /* Pad to even. */ 603 return (ARCHIVE_OK); 604 } 605 606 static int 607 header_bin_be(struct archive_read *a, struct cpio *cpio, 608 struct archive_entry *entry, size_t *namelength, size_t *name_pad) 609 { 610 const void *h; 611 const struct cpio_bin_header *header; 612 613 a->archive.archive_format = ARCHIVE_FORMAT_CPIO_BIN_BE; 614 a->archive.archive_format_name = "cpio (big-endian binary)"; 615 616 /* Read fixed-size portion of header. */ 617 h = __archive_read_ahead(a, sizeof(struct cpio_bin_header), NULL); 618 if (h == NULL) 619 return (ARCHIVE_FATAL); 620 __archive_read_consume(a, sizeof(struct cpio_bin_header)); 621 622 /* Parse out binary fields. */ 623 header = (const struct cpio_bin_header *)h; 624 archive_entry_set_dev(entry, header->c_dev[0] * 256 + header->c_dev[1]); 625 archive_entry_set_ino(entry, header->c_ino[0] * 256 + header->c_ino[1]); 626 archive_entry_set_mode(entry, header->c_mode[0] * 256 + header->c_mode[1]); 627 archive_entry_set_uid(entry, header->c_uid[0] * 256 + header->c_uid[1]); 628 archive_entry_set_gid(entry, header->c_gid[0] * 256 + header->c_gid[1]); 629 archive_entry_set_nlink(entry, header->c_nlink[0] * 256 + header->c_nlink[1]); 630 archive_entry_set_rdev(entry, header->c_rdev[0] * 256 + header->c_rdev[1]); 631 archive_entry_set_mtime(entry, be4(header->c_mtime), 0); 632 *namelength = header->c_namesize[0] * 256 + header->c_namesize[1]; 633 *name_pad = *namelength & 1; /* Pad to even. */ 634 635 cpio->entry_bytes_remaining = be4(header->c_filesize); 636 archive_entry_set_size(entry, cpio->entry_bytes_remaining); 637 cpio->entry_padding = cpio->entry_bytes_remaining & 1; /* Pad to even. */ 638 return (ARCHIVE_OK); 639 } 640 641 static int 642 archive_read_format_cpio_cleanup(struct archive_read *a) 643 { 644 struct cpio *cpio; 645 646 cpio = (struct cpio *)(a->format->data); 647 /* Free inode->name map */ 648 while (cpio->links_head != NULL) { 649 struct links_entry *lp = cpio->links_head->next; 650 651 if (cpio->links_head->name) 652 free(cpio->links_head->name); 653 free(cpio->links_head); 654 cpio->links_head = lp; 655 } 656 archive_string_free(&cpio->entry_name); 657 free(cpio); 658 (a->format->data) = NULL; 659 return (ARCHIVE_OK); 660 } 661 662 static int 663 le4(const unsigned char *p) 664 { 665 return ((p[0]<<16) + (p[1]<<24) + (p[2]<<0) + (p[3]<<8)); 666 } 667 668 669 static int 670 be4(const unsigned char *p) 671 { 672 return (p[0] + (p[1]<<8) + (p[2]<<16) + (p[3]<<24)); 673 } 674 675 /* 676 * Note that this implementation does not (and should not!) obey 677 * locale settings; you cannot simply substitute strtol here, since 678 * it does obey locale. 679 */ 680 static int64_t 681 atol8(const char *p, unsigned char_cnt) 682 { 683 int64_t l; 684 int digit; 685 686 l = 0; 687 while (char_cnt-- > 0) { 688 if (*p >= '0' && *p <= '7') 689 digit = *p - '0'; 690 else 691 return (l); 692 p++; 693 l <<= 3; 694 l |= digit; 695 } 696 return (l); 697 } 698 699 static int64_t 700 atol16(const char *p, unsigned char_cnt) 701 { 702 int64_t l; 703 int digit; 704 705 l = 0; 706 while (char_cnt-- > 0) { 707 if (*p >= 'a' && *p <= 'f') 708 digit = *p - 'a' + 10; 709 else if (*p >= 'A' && *p <= 'F') 710 digit = *p - 'A' + 10; 711 else if (*p >= '0' && *p <= '9') 712 digit = *p - '0'; 713 else 714 return (l); 715 p++; 716 l <<= 4; 717 l |= digit; 718 } 719 return (l); 720 } 721 722 static void 723 record_hardlink(struct cpio *cpio, struct archive_entry *entry) 724 { 725 struct links_entry *le; 726 dev_t dev; 727 ino_t ino; 728 729 dev = archive_entry_dev(entry); 730 ino = archive_entry_ino(entry); 731 732 /* 733 * First look in the list of multiply-linked files. If we've 734 * already dumped it, convert this entry to a hard link entry. 735 */ 736 for (le = cpio->links_head; le; le = le->next) { 737 if (le->dev == dev && le->ino == ino) { 738 archive_entry_copy_hardlink(entry, le->name); 739 740 if (--le->links <= 0) { 741 if (le->previous != NULL) 742 le->previous->next = le->next; 743 if (le->next != NULL) 744 le->next->previous = le->previous; 745 if (cpio->links_head == le) 746 cpio->links_head = le->next; 747 free(le->name); 748 free(le); 749 } 750 751 return; 752 } 753 } 754 755 le = (struct links_entry *)malloc(sizeof(struct links_entry)); 756 if (le == NULL) 757 __archive_errx(1, "Out of memory adding file to list"); 758 if (cpio->links_head != NULL) 759 cpio->links_head->previous = le; 760 le->next = cpio->links_head; 761 le->previous = NULL; 762 cpio->links_head = le; 763 le->dev = dev; 764 le->ino = ino; 765 le->links = archive_entry_nlink(entry) - 1; 766 le->name = strdup(archive_entry_pathname(entry)); 767 if (le->name == NULL) 768 __archive_errx(1, "Out of memory adding file to list"); 769 } 770