archive_read_support_format_cpio.c revision 228753
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: head/lib/libarchive/archive_read_support_format_cpio.c 201163 2009-12-29 05:50:34Z kientzle $"); 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 45struct 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 59struct 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 73struct 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 90struct links_entry { 91 struct links_entry *next; 92 struct links_entry *previous; 93 int links; 94 dev_t dev; 95 int64_t ino; 96 char *name; 97}; 98 99#define CPIO_MAGIC 0x13141516 100struct 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 112static int64_t atol16(const char *, unsigned); 113static int64_t atol8(const char *, unsigned); 114static int archive_read_format_cpio_bid(struct archive_read *); 115static int archive_read_format_cpio_cleanup(struct archive_read *); 116static int archive_read_format_cpio_read_data(struct archive_read *, 117 const void **, size_t *, off_t *); 118static int archive_read_format_cpio_read_header(struct archive_read *, 119 struct archive_entry *); 120static int be4(const unsigned char *); 121static int find_odc_header(struct archive_read *); 122static int find_newc_header(struct archive_read *); 123static int header_bin_be(struct archive_read *, struct cpio *, 124 struct archive_entry *, size_t *, size_t *); 125static int header_bin_le(struct archive_read *, struct cpio *, 126 struct archive_entry *, size_t *, size_t *); 127static int header_newc(struct archive_read *, struct cpio *, 128 struct archive_entry *, size_t *, size_t *); 129static int header_odc(struct archive_read *, struct cpio *, 130 struct archive_entry *, size_t *, size_t *); 131static int is_octal(const char *, size_t); 132static int is_hex(const char *, size_t); 133static int le4(const unsigned char *); 134static void record_hardlink(struct cpio *cpio, struct archive_entry *entry); 135 136int 137archive_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 167static int 168archive_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 223static int 224archive_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 /* XXX TODO: If the full mode is 0160200, then this is a Solaris 261 * ACL description for the following entry. Read this body 262 * and parse it as a Solaris-style ACL, then read the next 263 * header. XXX */ 264 265 /* Compare name to "TRAILER!!!" to test for end-of-archive. */ 266 if (namelength == 11 && strcmp((const char *)h, "TRAILER!!!") == 0) { 267 /* TODO: Store file location of start of block. */ 268 archive_clear_error(&a->archive); 269 return (ARCHIVE_EOF); 270 } 271 272 /* Detect and record hardlinks to previously-extracted entries. */ 273 record_hardlink(cpio, entry); 274 275 return (r); 276} 277 278static int 279archive_read_format_cpio_read_data(struct archive_read *a, 280 const void **buff, size_t *size, off_t *offset) 281{ 282 ssize_t bytes_read; 283 struct cpio *cpio; 284 285 cpio = (struct cpio *)(a->format->data); 286 if (cpio->entry_bytes_remaining > 0) { 287 *buff = __archive_read_ahead(a, 1, &bytes_read); 288 if (bytes_read <= 0) 289 return (ARCHIVE_FATAL); 290 if (bytes_read > cpio->entry_bytes_remaining) 291 bytes_read = cpio->entry_bytes_remaining; 292 *size = bytes_read; 293 *offset = cpio->entry_offset; 294 cpio->entry_offset += bytes_read; 295 cpio->entry_bytes_remaining -= bytes_read; 296 __archive_read_consume(a, bytes_read); 297 return (ARCHIVE_OK); 298 } else { 299 while (cpio->entry_padding > 0) { 300 *buff = __archive_read_ahead(a, 1, &bytes_read); 301 if (bytes_read <= 0) 302 return (ARCHIVE_FATAL); 303 if (bytes_read > cpio->entry_padding) 304 bytes_read = cpio->entry_padding; 305 __archive_read_consume(a, bytes_read); 306 cpio->entry_padding -= bytes_read; 307 } 308 *buff = NULL; 309 *size = 0; 310 *offset = cpio->entry_offset; 311 return (ARCHIVE_EOF); 312 } 313} 314 315/* 316 * Skip forward to the next cpio newc header by searching for the 317 * 07070[12] string. This should be generalized and merged with 318 * find_odc_header below. 319 */ 320static int 321is_hex(const char *p, size_t len) 322{ 323 while (len-- > 0) { 324 if ((*p >= '0' && *p <= '9') 325 || (*p >= 'a' && *p <= 'f') 326 || (*p >= 'A' && *p <= 'F')) 327 ++p; 328 else 329 return (0); 330 } 331 return (1); 332} 333 334static int 335find_newc_header(struct archive_read *a) 336{ 337 const void *h; 338 const char *p, *q; 339 size_t skip, skipped = 0; 340 ssize_t bytes; 341 342 for (;;) { 343 h = __archive_read_ahead(a, sizeof(struct cpio_newc_header), &bytes); 344 if (h == NULL) 345 return (ARCHIVE_FATAL); 346 p = h; 347 q = p + bytes; 348 349 /* Try the typical case first, then go into the slow search.*/ 350 if (memcmp("07070", p, 5) == 0 351 && (p[5] == '1' || p[5] == '2') 352 && is_hex(p, sizeof(struct cpio_newc_header))) 353 return (ARCHIVE_OK); 354 355 /* 356 * Scan ahead until we find something that looks 357 * like an odc header. 358 */ 359 while (p + sizeof(struct cpio_newc_header) <= q) { 360 switch (p[5]) { 361 case '1': 362 case '2': 363 if (memcmp("07070", p, 5) == 0 364 && is_hex(p, sizeof(struct cpio_newc_header))) { 365 skip = p - (const char *)h; 366 __archive_read_consume(a, skip); 367 skipped += skip; 368 if (skipped > 0) { 369 archive_set_error(&a->archive, 370 0, 371 "Skipped %d bytes before " 372 "finding valid header", 373 (int)skipped); 374 return (ARCHIVE_WARN); 375 } 376 return (ARCHIVE_OK); 377 } 378 p += 2; 379 break; 380 case '0': 381 p++; 382 break; 383 default: 384 p += 6; 385 break; 386 } 387 } 388 skip = p - (const char *)h; 389 __archive_read_consume(a, skip); 390 skipped += skip; 391 } 392} 393 394static int 395header_newc(struct archive_read *a, struct cpio *cpio, 396 struct archive_entry *entry, size_t *namelength, size_t *name_pad) 397{ 398 const void *h; 399 const struct cpio_newc_header *header; 400 int r; 401 402 r = find_newc_header(a); 403 if (r < ARCHIVE_WARN) 404 return (r); 405 406 /* Read fixed-size portion of header. */ 407 h = __archive_read_ahead(a, sizeof(struct cpio_newc_header), NULL); 408 if (h == NULL) 409 return (ARCHIVE_FATAL); 410 __archive_read_consume(a, sizeof(struct cpio_newc_header)); 411 412 /* Parse out hex fields. */ 413 header = (const struct cpio_newc_header *)h; 414 415 if (memcmp(header->c_magic, "070701", 6) == 0) { 416 a->archive.archive_format = ARCHIVE_FORMAT_CPIO_SVR4_NOCRC; 417 a->archive.archive_format_name = "ASCII cpio (SVR4 with no CRC)"; 418 } else if (memcmp(header->c_magic, "070702", 6) == 0) { 419 a->archive.archive_format = ARCHIVE_FORMAT_CPIO_SVR4_CRC; 420 a->archive.archive_format_name = "ASCII cpio (SVR4 with CRC)"; 421 } else { 422 /* TODO: Abort here? */ 423 } 424 425 archive_entry_set_devmajor(entry, atol16(header->c_devmajor, sizeof(header->c_devmajor))); 426 archive_entry_set_devminor(entry, atol16(header->c_devminor, sizeof(header->c_devminor))); 427 archive_entry_set_ino(entry, atol16(header->c_ino, sizeof(header->c_ino))); 428 archive_entry_set_mode(entry, atol16(header->c_mode, sizeof(header->c_mode))); 429 archive_entry_set_uid(entry, atol16(header->c_uid, sizeof(header->c_uid))); 430 archive_entry_set_gid(entry, atol16(header->c_gid, sizeof(header->c_gid))); 431 archive_entry_set_nlink(entry, atol16(header->c_nlink, sizeof(header->c_nlink))); 432 archive_entry_set_rdevmajor(entry, atol16(header->c_rdevmajor, sizeof(header->c_rdevmajor))); 433 archive_entry_set_rdevminor(entry, atol16(header->c_rdevminor, sizeof(header->c_rdevminor))); 434 archive_entry_set_mtime(entry, atol16(header->c_mtime, sizeof(header->c_mtime)), 0); 435 *namelength = atol16(header->c_namesize, sizeof(header->c_namesize)); 436 /* Pad name to 2 more than a multiple of 4. */ 437 *name_pad = (2 - *namelength) & 3; 438 439 /* 440 * Note: entry_bytes_remaining is at least 64 bits and 441 * therefore guaranteed to be big enough for a 33-bit file 442 * size. 443 */ 444 cpio->entry_bytes_remaining = 445 atol16(header->c_filesize, sizeof(header->c_filesize)); 446 archive_entry_set_size(entry, cpio->entry_bytes_remaining); 447 /* Pad file contents to a multiple of 4. */ 448 cpio->entry_padding = 3 & -cpio->entry_bytes_remaining; 449 return (r); 450} 451 452/* 453 * Skip forward to the next cpio odc header by searching for the 454 * 070707 string. This is a hand-optimized search that could 455 * probably be easily generalized to handle all character-based 456 * cpio variants. 457 */ 458static int 459is_octal(const char *p, size_t len) 460{ 461 while (len-- > 0) { 462 if (*p < '0' || *p > '7') 463 return (0); 464 ++p; 465 } 466 return (1); 467} 468 469static int 470find_odc_header(struct archive_read *a) 471{ 472 const void *h; 473 const char *p, *q; 474 size_t skip, skipped = 0; 475 ssize_t bytes; 476 477 for (;;) { 478 h = __archive_read_ahead(a, sizeof(struct cpio_odc_header), &bytes); 479 if (h == NULL) 480 return (ARCHIVE_FATAL); 481 p = h; 482 q = p + bytes; 483 484 /* Try the typical case first, then go into the slow search.*/ 485 if (memcmp("070707", p, 6) == 0 486 && is_octal(p, sizeof(struct cpio_odc_header))) 487 return (ARCHIVE_OK); 488 489 /* 490 * Scan ahead until we find something that looks 491 * like an odc header. 492 */ 493 while (p + sizeof(struct cpio_odc_header) <= q) { 494 switch (p[5]) { 495 case '7': 496 if (memcmp("070707", p, 6) == 0 497 && is_octal(p, sizeof(struct cpio_odc_header))) { 498 skip = p - (const char *)h; 499 __archive_read_consume(a, skip); 500 skipped += skip; 501 if (skipped > 0) { 502 archive_set_error(&a->archive, 503 0, 504 "Skipped %d bytes before " 505 "finding valid header", 506 (int)skipped); 507 return (ARCHIVE_WARN); 508 } 509 return (ARCHIVE_OK); 510 } 511 p += 2; 512 break; 513 case '0': 514 p++; 515 break; 516 default: 517 p += 6; 518 break; 519 } 520 } 521 skip = p - (const char *)h; 522 __archive_read_consume(a, skip); 523 skipped += skip; 524 } 525} 526 527static int 528header_odc(struct archive_read *a, struct cpio *cpio, 529 struct archive_entry *entry, size_t *namelength, size_t *name_pad) 530{ 531 const void *h; 532 int r; 533 const struct cpio_odc_header *header; 534 535 a->archive.archive_format = ARCHIVE_FORMAT_CPIO_POSIX; 536 a->archive.archive_format_name = "POSIX octet-oriented cpio"; 537 538 /* Find the start of the next header. */ 539 r = find_odc_header(a); 540 if (r < ARCHIVE_WARN) 541 return (r); 542 543 /* Read fixed-size portion of header. */ 544 h = __archive_read_ahead(a, sizeof(struct cpio_odc_header), NULL); 545 if (h == NULL) 546 return (ARCHIVE_FATAL); 547 __archive_read_consume(a, sizeof(struct cpio_odc_header)); 548 549 /* Parse out octal fields. */ 550 header = (const struct cpio_odc_header *)h; 551 552 archive_entry_set_dev(entry, atol8(header->c_dev, sizeof(header->c_dev))); 553 archive_entry_set_ino(entry, atol8(header->c_ino, sizeof(header->c_ino))); 554 archive_entry_set_mode(entry, atol8(header->c_mode, sizeof(header->c_mode))); 555 archive_entry_set_uid(entry, atol8(header->c_uid, sizeof(header->c_uid))); 556 archive_entry_set_gid(entry, atol8(header->c_gid, sizeof(header->c_gid))); 557 archive_entry_set_nlink(entry, atol8(header->c_nlink, sizeof(header->c_nlink))); 558 archive_entry_set_rdev(entry, atol8(header->c_rdev, sizeof(header->c_rdev))); 559 archive_entry_set_mtime(entry, atol8(header->c_mtime, sizeof(header->c_mtime)), 0); 560 *namelength = atol8(header->c_namesize, sizeof(header->c_namesize)); 561 *name_pad = 0; /* No padding of filename. */ 562 563 /* 564 * Note: entry_bytes_remaining is at least 64 bits and 565 * therefore guaranteed to be big enough for a 33-bit file 566 * size. 567 */ 568 cpio->entry_bytes_remaining = 569 atol8(header->c_filesize, sizeof(header->c_filesize)); 570 archive_entry_set_size(entry, cpio->entry_bytes_remaining); 571 cpio->entry_padding = 0; 572 return (r); 573} 574 575static int 576header_bin_le(struct archive_read *a, struct cpio *cpio, 577 struct archive_entry *entry, size_t *namelength, size_t *name_pad) 578{ 579 const void *h; 580 const struct cpio_bin_header *header; 581 582 a->archive.archive_format = ARCHIVE_FORMAT_CPIO_BIN_LE; 583 a->archive.archive_format_name = "cpio (little-endian binary)"; 584 585 /* Read fixed-size portion of header. */ 586 h = __archive_read_ahead(a, sizeof(struct cpio_bin_header), NULL); 587 if (h == NULL) 588 return (ARCHIVE_FATAL); 589 __archive_read_consume(a, sizeof(struct cpio_bin_header)); 590 591 /* Parse out binary fields. */ 592 header = (const struct cpio_bin_header *)h; 593 594 archive_entry_set_dev(entry, header->c_dev[0] + header->c_dev[1] * 256); 595 archive_entry_set_ino(entry, header->c_ino[0] + header->c_ino[1] * 256); 596 archive_entry_set_mode(entry, header->c_mode[0] + header->c_mode[1] * 256); 597 archive_entry_set_uid(entry, header->c_uid[0] + header->c_uid[1] * 256); 598 archive_entry_set_gid(entry, header->c_gid[0] + header->c_gid[1] * 256); 599 archive_entry_set_nlink(entry, header->c_nlink[0] + header->c_nlink[1] * 256); 600 archive_entry_set_rdev(entry, header->c_rdev[0] + header->c_rdev[1] * 256); 601 archive_entry_set_mtime(entry, le4(header->c_mtime), 0); 602 *namelength = header->c_namesize[0] + header->c_namesize[1] * 256; 603 *name_pad = *namelength & 1; /* Pad to even. */ 604 605 cpio->entry_bytes_remaining = le4(header->c_filesize); 606 archive_entry_set_size(entry, cpio->entry_bytes_remaining); 607 cpio->entry_padding = cpio->entry_bytes_remaining & 1; /* Pad to even. */ 608 return (ARCHIVE_OK); 609} 610 611static int 612header_bin_be(struct archive_read *a, struct cpio *cpio, 613 struct archive_entry *entry, size_t *namelength, size_t *name_pad) 614{ 615 const void *h; 616 const struct cpio_bin_header *header; 617 618 a->archive.archive_format = ARCHIVE_FORMAT_CPIO_BIN_BE; 619 a->archive.archive_format_name = "cpio (big-endian binary)"; 620 621 /* Read fixed-size portion of header. */ 622 h = __archive_read_ahead(a, sizeof(struct cpio_bin_header), NULL); 623 if (h == NULL) 624 return (ARCHIVE_FATAL); 625 __archive_read_consume(a, sizeof(struct cpio_bin_header)); 626 627 /* Parse out binary fields. */ 628 header = (const struct cpio_bin_header *)h; 629 archive_entry_set_dev(entry, header->c_dev[0] * 256 + header->c_dev[1]); 630 archive_entry_set_ino(entry, header->c_ino[0] * 256 + header->c_ino[1]); 631 archive_entry_set_mode(entry, header->c_mode[0] * 256 + header->c_mode[1]); 632 archive_entry_set_uid(entry, header->c_uid[0] * 256 + header->c_uid[1]); 633 archive_entry_set_gid(entry, header->c_gid[0] * 256 + header->c_gid[1]); 634 archive_entry_set_nlink(entry, header->c_nlink[0] * 256 + header->c_nlink[1]); 635 archive_entry_set_rdev(entry, header->c_rdev[0] * 256 + header->c_rdev[1]); 636 archive_entry_set_mtime(entry, be4(header->c_mtime), 0); 637 *namelength = header->c_namesize[0] * 256 + header->c_namesize[1]; 638 *name_pad = *namelength & 1; /* Pad to even. */ 639 640 cpio->entry_bytes_remaining = be4(header->c_filesize); 641 archive_entry_set_size(entry, cpio->entry_bytes_remaining); 642 cpio->entry_padding = cpio->entry_bytes_remaining & 1; /* Pad to even. */ 643 return (ARCHIVE_OK); 644} 645 646static int 647archive_read_format_cpio_cleanup(struct archive_read *a) 648{ 649 struct cpio *cpio; 650 651 cpio = (struct cpio *)(a->format->data); 652 /* Free inode->name map */ 653 while (cpio->links_head != NULL) { 654 struct links_entry *lp = cpio->links_head->next; 655 656 if (cpio->links_head->name) 657 free(cpio->links_head->name); 658 free(cpio->links_head); 659 cpio->links_head = lp; 660 } 661 archive_string_free(&cpio->entry_name); 662 free(cpio); 663 (a->format->data) = NULL; 664 return (ARCHIVE_OK); 665} 666 667static int 668le4(const unsigned char *p) 669{ 670 return ((p[0]<<16) + (p[1]<<24) + (p[2]<<0) + (p[3]<<8)); 671} 672 673 674static int 675be4(const unsigned char *p) 676{ 677 return ((p[0]<<24) + (p[1]<<16) + (p[2]<<8) + (p[3])); 678} 679 680/* 681 * Note that this implementation does not (and should not!) obey 682 * locale settings; you cannot simply substitute strtol here, since 683 * it does obey locale. 684 */ 685static int64_t 686atol8(const char *p, unsigned char_cnt) 687{ 688 int64_t l; 689 int digit; 690 691 l = 0; 692 while (char_cnt-- > 0) { 693 if (*p >= '0' && *p <= '7') 694 digit = *p - '0'; 695 else 696 return (l); 697 p++; 698 l <<= 3; 699 l |= digit; 700 } 701 return (l); 702} 703 704static int64_t 705atol16(const char *p, unsigned char_cnt) 706{ 707 int64_t l; 708 int digit; 709 710 l = 0; 711 while (char_cnt-- > 0) { 712 if (*p >= 'a' && *p <= 'f') 713 digit = *p - 'a' + 10; 714 else if (*p >= 'A' && *p <= 'F') 715 digit = *p - 'A' + 10; 716 else if (*p >= '0' && *p <= '9') 717 digit = *p - '0'; 718 else 719 return (l); 720 p++; 721 l <<= 4; 722 l |= digit; 723 } 724 return (l); 725} 726 727static void 728record_hardlink(struct cpio *cpio, struct archive_entry *entry) 729{ 730 struct links_entry *le; 731 dev_t dev; 732 int64_t ino; 733 734 if (archive_entry_nlink(entry) <= 1) 735 return; 736 737 dev = archive_entry_dev(entry); 738 ino = archive_entry_ino64(entry); 739 740 /* 741 * First look in the list of multiply-linked files. If we've 742 * already dumped it, convert this entry to a hard link entry. 743 */ 744 for (le = cpio->links_head; le; le = le->next) { 745 if (le->dev == dev && le->ino == ino) { 746 archive_entry_copy_hardlink(entry, le->name); 747 748 if (--le->links <= 0) { 749 if (le->previous != NULL) 750 le->previous->next = le->next; 751 if (le->next != NULL) 752 le->next->previous = le->previous; 753 if (cpio->links_head == le) 754 cpio->links_head = le->next; 755 free(le->name); 756 free(le); 757 } 758 759 return; 760 } 761 } 762 763 le = (struct links_entry *)malloc(sizeof(struct links_entry)); 764 if (le == NULL) 765 __archive_errx(1, "Out of memory adding file to list"); 766 if (cpio->links_head != NULL) 767 cpio->links_head->previous = le; 768 le->next = cpio->links_head; 769 le->previous = NULL; 770 cpio->links_head = le; 771 le->dev = dev; 772 le->ino = ino; 773 le->links = archive_entry_nlink(entry) - 1; 774 le->name = strdup(archive_entry_pathname(entry)); 775 if (le->name == NULL) 776 __archive_errx(1, "Out of memory adding file to list"); 777} 778