archive_read_support_format_cpio.c revision 267654
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: releng/9.3/contrib/libarchive/libarchive/archive_read_support_format_cpio.c 229592 2012-01-05 12:06:54Z mm $"); 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#ifdef _MSC_VER 46#define __packed 47#pragma pack(push, 1) 48#endif 49struct cpio_bin_header { 50 unsigned char c_magic[2]; 51 unsigned char c_dev[2]; 52 unsigned char c_ino[2]; 53 unsigned char c_mode[2]; 54 unsigned char c_uid[2]; 55 unsigned char c_gid[2]; 56 unsigned char c_nlink[2]; 57 unsigned char c_rdev[2]; 58 unsigned char c_mtime[4]; 59 unsigned char c_namesize[2]; 60 unsigned char c_filesize[4]; 61} __packed; 62 63struct cpio_odc_header { 64 char c_magic[6]; 65 char c_dev[6]; 66 char c_ino[6]; 67 char c_mode[6]; 68 char c_uid[6]; 69 char c_gid[6]; 70 char c_nlink[6]; 71 char c_rdev[6]; 72 char c_mtime[11]; 73 char c_namesize[6]; 74 char c_filesize[11]; 75} __packed; 76 77struct cpio_newc_header { 78 char c_magic[6]; 79 char c_ino[8]; 80 char c_mode[8]; 81 char c_uid[8]; 82 char c_gid[8]; 83 char c_nlink[8]; 84 char c_mtime[8]; 85 char c_filesize[8]; 86 char c_devmajor[8]; 87 char c_devminor[8]; 88 char c_rdevmajor[8]; 89 char c_rdevminor[8]; 90 char c_namesize[8]; 91 char c_crc[8]; 92} __packed; 93 94#ifdef _MSC_VER 95#undef __packed 96#pragma pack(pop) 97#endif 98 99struct links_entry { 100 struct links_entry *next; 101 struct links_entry *previous; 102 int links; 103 dev_t dev; 104 int64_t ino; 105 char *name; 106}; 107 108#define CPIO_MAGIC 0x13141516 109struct cpio { 110 int magic; 111 int (*read_header)(struct archive_read *, struct cpio *, 112 struct archive_entry *, size_t *, size_t *); 113 struct links_entry *links_head; 114 struct archive_string entry_name; 115 struct archive_string entry_linkname; 116 off_t entry_bytes_remaining; 117 off_t entry_offset; 118 off_t entry_padding; 119}; 120 121static int64_t atol16(const char *, unsigned); 122static int64_t atol8(const char *, unsigned); 123static int archive_read_format_cpio_bid(struct archive_read *); 124static int archive_read_format_cpio_cleanup(struct archive_read *); 125static int archive_read_format_cpio_read_data(struct archive_read *, 126 const void **, size_t *, off_t *); 127static int archive_read_format_cpio_read_header(struct archive_read *, 128 struct archive_entry *); 129static int be4(const unsigned char *); 130static int find_odc_header(struct archive_read *); 131static int find_newc_header(struct archive_read *); 132static int header_bin_be(struct archive_read *, struct cpio *, 133 struct archive_entry *, size_t *, size_t *); 134static int header_bin_le(struct archive_read *, struct cpio *, 135 struct archive_entry *, size_t *, size_t *); 136static int header_newc(struct archive_read *, struct cpio *, 137 struct archive_entry *, size_t *, size_t *); 138static int header_odc(struct archive_read *, struct cpio *, 139 struct archive_entry *, size_t *, size_t *); 140static int is_octal(const char *, size_t); 141static int is_hex(const char *, size_t); 142static int le4(const unsigned char *); 143static void record_hardlink(struct cpio *cpio, struct archive_entry *entry); 144 145int 146archive_read_support_format_cpio(struct archive *_a) 147{ 148 struct archive_read *a = (struct archive_read *)_a; 149 struct cpio *cpio; 150 int r; 151 152 cpio = (struct cpio *)malloc(sizeof(*cpio)); 153 if (cpio == NULL) { 154 archive_set_error(&a->archive, ENOMEM, "Can't allocate cpio data"); 155 return (ARCHIVE_FATAL); 156 } 157 memset(cpio, 0, sizeof(*cpio)); 158 cpio->magic = CPIO_MAGIC; 159 160 r = __archive_read_register_format(a, 161 cpio, 162 "cpio", 163 archive_read_format_cpio_bid, 164 NULL, 165 archive_read_format_cpio_read_header, 166 archive_read_format_cpio_read_data, 167 NULL, 168 archive_read_format_cpio_cleanup); 169 170 if (r != ARCHIVE_OK) 171 free(cpio); 172 return (ARCHIVE_OK); 173} 174 175 176static int 177archive_read_format_cpio_bid(struct archive_read *a) 178{ 179 const void *h; 180 const unsigned char *p; 181 struct cpio *cpio; 182 int bid; 183 184 cpio = (struct cpio *)(a->format->data); 185 186 if ((h = __archive_read_ahead(a, 6, NULL)) == NULL) 187 return (-1); 188 189 p = (const unsigned char *)h; 190 bid = 0; 191 if (memcmp(p, "070707", 6) == 0) { 192 /* ASCII cpio archive (odc, POSIX.1) */ 193 cpio->read_header = header_odc; 194 bid += 48; 195 /* 196 * XXX TODO: More verification; Could check that only octal 197 * digits appear in appropriate header locations. XXX 198 */ 199 } else if (memcmp(p, "070701", 6) == 0) { 200 /* ASCII cpio archive (SVR4 without CRC) */ 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 (memcmp(p, "070702", 6) == 0) { 208 /* ASCII cpio archive (SVR4 with CRC) */ 209 /* XXX TODO: Flag that we should check the CRC. XXX */ 210 cpio->read_header = header_newc; 211 bid += 48; 212 /* 213 * XXX TODO: More verification; Could check that only hex 214 * digits appear in appropriate header locations. XXX 215 */ 216 } else if (p[0] * 256 + p[1] == 070707) { 217 /* big-endian binary cpio archives */ 218 cpio->read_header = header_bin_be; 219 bid += 16; 220 /* Is more verification possible here? */ 221 } else if (p[0] + p[1] * 256 == 070707) { 222 /* little-endian binary cpio archives */ 223 cpio->read_header = header_bin_le; 224 bid += 16; 225 /* Is more verification possible here? */ 226 } else 227 return (ARCHIVE_WARN); 228 229 return (bid); 230} 231 232static int 233archive_read_format_cpio_read_header(struct archive_read *a, 234 struct archive_entry *entry) 235{ 236 struct cpio *cpio; 237 const void *h; 238 size_t namelength; 239 size_t name_pad; 240 int r; 241 242 cpio = (struct cpio *)(a->format->data); 243 r = (cpio->read_header(a, cpio, entry, &namelength, &name_pad)); 244 245 if (r < ARCHIVE_WARN) 246 return (r); 247 248 /* Read name from buffer. */ 249 h = __archive_read_ahead(a, namelength + name_pad, NULL); 250 if (h == NULL) 251 return (ARCHIVE_FATAL); 252 __archive_read_consume(a, namelength + name_pad); 253 archive_strncpy(&cpio->entry_name, (const char *)h, namelength); 254 archive_entry_set_pathname(entry, cpio->entry_name.s); 255 cpio->entry_offset = 0; 256 257 /* If this is a symlink, read the link contents. */ 258 if (archive_entry_filetype(entry) == AE_IFLNK) { 259 h = __archive_read_ahead(a, cpio->entry_bytes_remaining, NULL); 260 if (h == NULL) 261 return (ARCHIVE_FATAL); 262 __archive_read_consume(a, cpio->entry_bytes_remaining); 263 archive_strncpy(&cpio->entry_linkname, (const char *)h, 264 cpio->entry_bytes_remaining); 265 archive_entry_set_symlink(entry, cpio->entry_linkname.s); 266 cpio->entry_bytes_remaining = 0; 267 } 268 269 /* XXX TODO: If the full mode is 0160200, then this is a Solaris 270 * ACL description for the following entry. Read this body 271 * and parse it as a Solaris-style ACL, then read the next 272 * header. XXX */ 273 274 /* Compare name to "TRAILER!!!" to test for end-of-archive. */ 275 if (namelength == 11 && strcmp((const char *)h, "TRAILER!!!") == 0) { 276 /* TODO: Store file location of start of block. */ 277 archive_clear_error(&a->archive); 278 return (ARCHIVE_EOF); 279 } 280 281 /* Detect and record hardlinks to previously-extracted entries. */ 282 record_hardlink(cpio, entry); 283 284 return (r); 285} 286 287static int 288archive_read_format_cpio_read_data(struct archive_read *a, 289 const void **buff, size_t *size, off_t *offset) 290{ 291 ssize_t bytes_read; 292 struct cpio *cpio; 293 294 cpio = (struct cpio *)(a->format->data); 295 if (cpio->entry_bytes_remaining > 0) { 296 *buff = __archive_read_ahead(a, 1, &bytes_read); 297 if (bytes_read <= 0) 298 return (ARCHIVE_FATAL); 299 if (bytes_read > cpio->entry_bytes_remaining) 300 bytes_read = cpio->entry_bytes_remaining; 301 *size = bytes_read; 302 *offset = cpio->entry_offset; 303 cpio->entry_offset += bytes_read; 304 cpio->entry_bytes_remaining -= bytes_read; 305 __archive_read_consume(a, bytes_read); 306 return (ARCHIVE_OK); 307 } else { 308 while (cpio->entry_padding > 0) { 309 *buff = __archive_read_ahead(a, 1, &bytes_read); 310 if (bytes_read <= 0) 311 return (ARCHIVE_FATAL); 312 if (bytes_read > cpio->entry_padding) 313 bytes_read = cpio->entry_padding; 314 __archive_read_consume(a, bytes_read); 315 cpio->entry_padding -= bytes_read; 316 } 317 *buff = NULL; 318 *size = 0; 319 *offset = cpio->entry_offset; 320 return (ARCHIVE_EOF); 321 } 322} 323 324/* 325 * Skip forward to the next cpio newc header by searching for the 326 * 07070[12] string. This should be generalized and merged with 327 * find_odc_header below. 328 */ 329static int 330is_hex(const char *p, size_t len) 331{ 332 while (len-- > 0) { 333 if ((*p >= '0' && *p <= '9') 334 || (*p >= 'a' && *p <= 'f') 335 || (*p >= 'A' && *p <= 'F')) 336 ++p; 337 else 338 return (0); 339 } 340 return (1); 341} 342 343static int 344find_newc_header(struct archive_read *a) 345{ 346 const void *h; 347 const char *p, *q; 348 size_t skip, skipped = 0; 349 ssize_t bytes; 350 351 for (;;) { 352 h = __archive_read_ahead(a, sizeof(struct cpio_newc_header), &bytes); 353 if (h == NULL) 354 return (ARCHIVE_FATAL); 355 p = h; 356 q = p + bytes; 357 358 /* Try the typical case first, then go into the slow search.*/ 359 if (memcmp("07070", p, 5) == 0 360 && (p[5] == '1' || p[5] == '2') 361 && is_hex(p, sizeof(struct cpio_newc_header))) 362 return (ARCHIVE_OK); 363 364 /* 365 * Scan ahead until we find something that looks 366 * like an odc header. 367 */ 368 while (p + sizeof(struct cpio_newc_header) <= q) { 369 switch (p[5]) { 370 case '1': 371 case '2': 372 if (memcmp("07070", p, 5) == 0 373 && is_hex(p, sizeof(struct cpio_newc_header))) { 374 skip = p - (const char *)h; 375 __archive_read_consume(a, skip); 376 skipped += skip; 377 if (skipped > 0) { 378 archive_set_error(&a->archive, 379 0, 380 "Skipped %d bytes before " 381 "finding valid header", 382 (int)skipped); 383 return (ARCHIVE_WARN); 384 } 385 return (ARCHIVE_OK); 386 } 387 p += 2; 388 break; 389 case '0': 390 p++; 391 break; 392 default: 393 p += 6; 394 break; 395 } 396 } 397 skip = p - (const char *)h; 398 __archive_read_consume(a, skip); 399 skipped += skip; 400 } 401} 402 403static int 404header_newc(struct archive_read *a, struct cpio *cpio, 405 struct archive_entry *entry, size_t *namelength, size_t *name_pad) 406{ 407 const void *h; 408 const struct cpio_newc_header *header; 409 int r; 410 411 r = find_newc_header(a); 412 if (r < ARCHIVE_WARN) 413 return (r); 414 415 /* Read fixed-size portion of header. */ 416 h = __archive_read_ahead(a, sizeof(struct cpio_newc_header), NULL); 417 if (h == NULL) 418 return (ARCHIVE_FATAL); 419 __archive_read_consume(a, sizeof(struct cpio_newc_header)); 420 421 /* Parse out hex fields. */ 422 header = (const struct cpio_newc_header *)h; 423 424 if (memcmp(header->c_magic, "070701", 6) == 0) { 425 a->archive.archive_format = ARCHIVE_FORMAT_CPIO_SVR4_NOCRC; 426 a->archive.archive_format_name = "ASCII cpio (SVR4 with no CRC)"; 427 } else if (memcmp(header->c_magic, "070702", 6) == 0) { 428 a->archive.archive_format = ARCHIVE_FORMAT_CPIO_SVR4_CRC; 429 a->archive.archive_format_name = "ASCII cpio (SVR4 with CRC)"; 430 } else { 431 /* TODO: Abort here? */ 432 } 433 434 archive_entry_set_devmajor(entry, atol16(header->c_devmajor, sizeof(header->c_devmajor))); 435 archive_entry_set_devminor(entry, atol16(header->c_devminor, sizeof(header->c_devminor))); 436 archive_entry_set_ino(entry, atol16(header->c_ino, sizeof(header->c_ino))); 437 archive_entry_set_mode(entry, atol16(header->c_mode, sizeof(header->c_mode))); 438 archive_entry_set_uid(entry, atol16(header->c_uid, sizeof(header->c_uid))); 439 archive_entry_set_gid(entry, atol16(header->c_gid, sizeof(header->c_gid))); 440 archive_entry_set_nlink(entry, atol16(header->c_nlink, sizeof(header->c_nlink))); 441 archive_entry_set_rdevmajor(entry, atol16(header->c_rdevmajor, sizeof(header->c_rdevmajor))); 442 archive_entry_set_rdevminor(entry, atol16(header->c_rdevminor, sizeof(header->c_rdevminor))); 443 archive_entry_set_mtime(entry, atol16(header->c_mtime, sizeof(header->c_mtime)), 0); 444 *namelength = atol16(header->c_namesize, sizeof(header->c_namesize)); 445 /* Pad name to 2 more than a multiple of 4. */ 446 *name_pad = (2 - *namelength) & 3; 447 448 /* 449 * Note: entry_bytes_remaining is at least 64 bits and 450 * therefore guaranteed to be big enough for a 33-bit file 451 * size. 452 */ 453 cpio->entry_bytes_remaining = 454 atol16(header->c_filesize, sizeof(header->c_filesize)); 455 archive_entry_set_size(entry, cpio->entry_bytes_remaining); 456 /* Pad file contents to a multiple of 4. */ 457 cpio->entry_padding = 3 & -cpio->entry_bytes_remaining; 458 return (r); 459} 460 461/* 462 * Skip forward to the next cpio odc header by searching for the 463 * 070707 string. This is a hand-optimized search that could 464 * probably be easily generalized to handle all character-based 465 * cpio variants. 466 */ 467static int 468is_octal(const char *p, size_t len) 469{ 470 while (len-- > 0) { 471 if (*p < '0' || *p > '7') 472 return (0); 473 ++p; 474 } 475 return (1); 476} 477 478static int 479find_odc_header(struct archive_read *a) 480{ 481 const void *h; 482 const char *p, *q; 483 size_t skip, skipped = 0; 484 ssize_t bytes; 485 486 for (;;) { 487 h = __archive_read_ahead(a, sizeof(struct cpio_odc_header), &bytes); 488 if (h == NULL) 489 return (ARCHIVE_FATAL); 490 p = h; 491 q = p + bytes; 492 493 /* Try the typical case first, then go into the slow search.*/ 494 if (memcmp("070707", p, 6) == 0 495 && is_octal(p, sizeof(struct cpio_odc_header))) 496 return (ARCHIVE_OK); 497 498 /* 499 * Scan ahead until we find something that looks 500 * like an odc header. 501 */ 502 while (p + sizeof(struct cpio_odc_header) <= q) { 503 switch (p[5]) { 504 case '7': 505 if (memcmp("070707", p, 6) == 0 506 && is_octal(p, sizeof(struct cpio_odc_header))) { 507 skip = p - (const char *)h; 508 __archive_read_consume(a, skip); 509 skipped += skip; 510 if (skipped > 0) { 511 archive_set_error(&a->archive, 512 0, 513 "Skipped %d bytes before " 514 "finding valid header", 515 (int)skipped); 516 return (ARCHIVE_WARN); 517 } 518 return (ARCHIVE_OK); 519 } 520 p += 2; 521 break; 522 case '0': 523 p++; 524 break; 525 default: 526 p += 6; 527 break; 528 } 529 } 530 skip = p - (const char *)h; 531 __archive_read_consume(a, skip); 532 skipped += skip; 533 } 534} 535 536static int 537header_odc(struct archive_read *a, struct cpio *cpio, 538 struct archive_entry *entry, size_t *namelength, size_t *name_pad) 539{ 540 const void *h; 541 int r; 542 const struct cpio_odc_header *header; 543 544 a->archive.archive_format = ARCHIVE_FORMAT_CPIO_POSIX; 545 a->archive.archive_format_name = "POSIX octet-oriented cpio"; 546 547 /* Find the start of the next header. */ 548 r = find_odc_header(a); 549 if (r < ARCHIVE_WARN) 550 return (r); 551 552 /* Read fixed-size portion of header. */ 553 h = __archive_read_ahead(a, sizeof(struct cpio_odc_header), NULL); 554 if (h == NULL) 555 return (ARCHIVE_FATAL); 556 __archive_read_consume(a, sizeof(struct cpio_odc_header)); 557 558 /* Parse out octal fields. */ 559 header = (const struct cpio_odc_header *)h; 560 561 archive_entry_set_dev(entry, atol8(header->c_dev, sizeof(header->c_dev))); 562 archive_entry_set_ino(entry, atol8(header->c_ino, sizeof(header->c_ino))); 563 archive_entry_set_mode(entry, atol8(header->c_mode, sizeof(header->c_mode))); 564 archive_entry_set_uid(entry, atol8(header->c_uid, sizeof(header->c_uid))); 565 archive_entry_set_gid(entry, atol8(header->c_gid, sizeof(header->c_gid))); 566 archive_entry_set_nlink(entry, atol8(header->c_nlink, sizeof(header->c_nlink))); 567 archive_entry_set_rdev(entry, atol8(header->c_rdev, sizeof(header->c_rdev))); 568 archive_entry_set_mtime(entry, atol8(header->c_mtime, sizeof(header->c_mtime)), 0); 569 *namelength = atol8(header->c_namesize, sizeof(header->c_namesize)); 570 *name_pad = 0; /* No padding of filename. */ 571 572 /* 573 * Note: entry_bytes_remaining is at least 64 bits and 574 * therefore guaranteed to be big enough for a 33-bit file 575 * size. 576 */ 577 cpio->entry_bytes_remaining = 578 atol8(header->c_filesize, sizeof(header->c_filesize)); 579 archive_entry_set_size(entry, cpio->entry_bytes_remaining); 580 cpio->entry_padding = 0; 581 return (r); 582} 583 584static int 585header_bin_le(struct archive_read *a, struct cpio *cpio, 586 struct archive_entry *entry, size_t *namelength, size_t *name_pad) 587{ 588 const void *h; 589 const struct cpio_bin_header *header; 590 591 a->archive.archive_format = ARCHIVE_FORMAT_CPIO_BIN_LE; 592 a->archive.archive_format_name = "cpio (little-endian binary)"; 593 594 /* Read fixed-size portion of header. */ 595 h = __archive_read_ahead(a, sizeof(struct cpio_bin_header), NULL); 596 if (h == NULL) 597 return (ARCHIVE_FATAL); 598 __archive_read_consume(a, sizeof(struct cpio_bin_header)); 599 600 /* Parse out binary fields. */ 601 header = (const struct cpio_bin_header *)h; 602 603 archive_entry_set_dev(entry, header->c_dev[0] + header->c_dev[1] * 256); 604 archive_entry_set_ino(entry, header->c_ino[0] + header->c_ino[1] * 256); 605 archive_entry_set_mode(entry, header->c_mode[0] + header->c_mode[1] * 256); 606 archive_entry_set_uid(entry, header->c_uid[0] + header->c_uid[1] * 256); 607 archive_entry_set_gid(entry, header->c_gid[0] + header->c_gid[1] * 256); 608 archive_entry_set_nlink(entry, header->c_nlink[0] + header->c_nlink[1] * 256); 609 archive_entry_set_rdev(entry, header->c_rdev[0] + header->c_rdev[1] * 256); 610 archive_entry_set_mtime(entry, le4(header->c_mtime), 0); 611 *namelength = header->c_namesize[0] + header->c_namesize[1] * 256; 612 *name_pad = *namelength & 1; /* Pad to even. */ 613 614 cpio->entry_bytes_remaining = le4(header->c_filesize); 615 archive_entry_set_size(entry, cpio->entry_bytes_remaining); 616 cpio->entry_padding = cpio->entry_bytes_remaining & 1; /* Pad to even. */ 617 return (ARCHIVE_OK); 618} 619 620static int 621header_bin_be(struct archive_read *a, struct cpio *cpio, 622 struct archive_entry *entry, size_t *namelength, size_t *name_pad) 623{ 624 const void *h; 625 const struct cpio_bin_header *header; 626 627 a->archive.archive_format = ARCHIVE_FORMAT_CPIO_BIN_BE; 628 a->archive.archive_format_name = "cpio (big-endian binary)"; 629 630 /* Read fixed-size portion of header. */ 631 h = __archive_read_ahead(a, sizeof(struct cpio_bin_header), NULL); 632 if (h == NULL) 633 return (ARCHIVE_FATAL); 634 __archive_read_consume(a, sizeof(struct cpio_bin_header)); 635 636 /* Parse out binary fields. */ 637 header = (const struct cpio_bin_header *)h; 638 archive_entry_set_dev(entry, header->c_dev[0] * 256 + header->c_dev[1]); 639 archive_entry_set_ino(entry, header->c_ino[0] * 256 + header->c_ino[1]); 640 archive_entry_set_mode(entry, header->c_mode[0] * 256 + header->c_mode[1]); 641 archive_entry_set_uid(entry, header->c_uid[0] * 256 + header->c_uid[1]); 642 archive_entry_set_gid(entry, header->c_gid[0] * 256 + header->c_gid[1]); 643 archive_entry_set_nlink(entry, header->c_nlink[0] * 256 + header->c_nlink[1]); 644 archive_entry_set_rdev(entry, header->c_rdev[0] * 256 + header->c_rdev[1]); 645 archive_entry_set_mtime(entry, be4(header->c_mtime), 0); 646 *namelength = header->c_namesize[0] * 256 + header->c_namesize[1]; 647 *name_pad = *namelength & 1; /* Pad to even. */ 648 649 cpio->entry_bytes_remaining = be4(header->c_filesize); 650 archive_entry_set_size(entry, cpio->entry_bytes_remaining); 651 cpio->entry_padding = cpio->entry_bytes_remaining & 1; /* Pad to even. */ 652 return (ARCHIVE_OK); 653} 654 655static int 656archive_read_format_cpio_cleanup(struct archive_read *a) 657{ 658 struct cpio *cpio; 659 660 cpio = (struct cpio *)(a->format->data); 661 /* Free inode->name map */ 662 while (cpio->links_head != NULL) { 663 struct links_entry *lp = cpio->links_head->next; 664 665 if (cpio->links_head->name) 666 free(cpio->links_head->name); 667 free(cpio->links_head); 668 cpio->links_head = lp; 669 } 670 archive_string_free(&cpio->entry_name); 671 free(cpio); 672 (a->format->data) = NULL; 673 return (ARCHIVE_OK); 674} 675 676static int 677le4(const unsigned char *p) 678{ 679 return ((p[0]<<16) + (p[1]<<24) + (p[2]<<0) + (p[3]<<8)); 680} 681 682 683static int 684be4(const unsigned char *p) 685{ 686 return ((p[0]<<24) + (p[1]<<16) + (p[2]<<8) + (p[3])); 687} 688 689/* 690 * Note that this implementation does not (and should not!) obey 691 * locale settings; you cannot simply substitute strtol here, since 692 * it does obey locale. 693 */ 694static int64_t 695atol8(const char *p, unsigned char_cnt) 696{ 697 int64_t l; 698 int digit; 699 700 l = 0; 701 while (char_cnt-- > 0) { 702 if (*p >= '0' && *p <= '7') 703 digit = *p - '0'; 704 else 705 return (l); 706 p++; 707 l <<= 3; 708 l |= digit; 709 } 710 return (l); 711} 712 713static int64_t 714atol16(const char *p, unsigned char_cnt) 715{ 716 int64_t l; 717 int digit; 718 719 l = 0; 720 while (char_cnt-- > 0) { 721 if (*p >= 'a' && *p <= 'f') 722 digit = *p - 'a' + 10; 723 else if (*p >= 'A' && *p <= 'F') 724 digit = *p - 'A' + 10; 725 else if (*p >= '0' && *p <= '9') 726 digit = *p - '0'; 727 else 728 return (l); 729 p++; 730 l <<= 4; 731 l |= digit; 732 } 733 return (l); 734} 735 736static void 737record_hardlink(struct cpio *cpio, struct archive_entry *entry) 738{ 739 struct links_entry *le; 740 dev_t dev; 741 int64_t ino; 742 743 if (archive_entry_nlink(entry) <= 1) 744 return; 745 746 dev = archive_entry_dev(entry); 747 ino = archive_entry_ino64(entry); 748 749 /* 750 * First look in the list of multiply-linked files. If we've 751 * already dumped it, convert this entry to a hard link entry. 752 */ 753 for (le = cpio->links_head; le; le = le->next) { 754 if (le->dev == dev && le->ino == ino) { 755 archive_entry_copy_hardlink(entry, le->name); 756 757 if (--le->links <= 0) { 758 if (le->previous != NULL) 759 le->previous->next = le->next; 760 if (le->next != NULL) 761 le->next->previous = le->previous; 762 if (cpio->links_head == le) 763 cpio->links_head = le->next; 764 free(le->name); 765 free(le); 766 } 767 768 return; 769 } 770 } 771 772 le = (struct links_entry *)malloc(sizeof(struct links_entry)); 773 if (le == NULL) 774 __archive_errx(1, "Out of memory adding file to list"); 775 if (cpio->links_head != NULL) 776 cpio->links_head->previous = le; 777 le->next = cpio->links_head; 778 le->previous = NULL; 779 cpio->links_head = le; 780 le->dev = dev; 781 le->ino = ino; 782 le->links = archive_entry_nlink(entry) - 1; 783 le->name = strdup(archive_entry_pathname(entry)); 784 if (le->name == NULL) 785 __archive_errx(1, "Out of memory adding file to list"); 786} 787