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 * in this position and unchanged. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 28 #include "cpio_platform.h" 29 __FBSDID("$FreeBSD: src/usr.bin/cpio/cpio.c,v 1.15 2008/12/06 07:30:40 kientzle Exp $"); 30 31 #include <sys/types.h> 32 #include <archive.h> 33 #include <archive_entry.h> 34 35 #ifdef HAVE_SYS_MKDEV_H 36 #include <sys/mkdev.h> 37 #endif 38 #ifdef HAVE_SYS_STAT_H 39 #include <sys/stat.h> 40 #endif 41 #ifdef HAVE_SYS_TIME_H 42 #include <sys/time.h> 43 #endif 44 #ifdef HAVE_ERRNO_H 45 #include <errno.h> 46 #endif 47 #ifdef HAVE_FCNTL_H 48 #include <fcntl.h> 49 #endif 50 #ifdef HAVE_GRP_H 51 #include <grp.h> 52 #endif 53 #ifdef HAVE_PWD_H 54 #include <pwd.h> 55 #endif 56 #ifdef HAVE_STDARG_H 57 #include <stdarg.h> 58 #endif 59 #ifdef HAVE_STDINT_H 60 #include <stdint.h> 61 #endif 62 #include <stdio.h> 63 #ifdef HAVE_STDLIB_H 64 #include <stdlib.h> 65 #endif 66 #ifdef HAVE_STRING_H 67 #include <string.h> 68 #endif 69 #ifdef HAVE_UNISTD_H 70 #include <unistd.h> 71 #endif 72 #ifdef HAVE_SYS_TIME_H 73 #include <sys/time.h> 74 #endif 75 #ifdef HAVE_TIME_H 76 #include <time.h> 77 #endif 78 79 #include "cpio.h" 80 #include "err.h" 81 #include "line_reader.h" 82 #include "matching.h" 83 84 /* Fixed size of uname/gname caches. */ 85 #define name_cache_size 101 86 87 #ifndef O_BINARY 88 #define O_BINARY 0 89 #endif 90 91 struct name_cache { 92 int probes; 93 int hits; 94 size_t size; 95 struct { 96 id_t id; 97 char *name; 98 } cache[name_cache_size]; 99 }; 100 101 static int extract_data(struct archive *, struct archive *); 102 const char * cpio_i64toa(int64_t); 103 static const char *cpio_rename(const char *name); 104 static int entry_to_archive(struct cpio *, struct archive_entry *); 105 static int file_to_archive(struct cpio *, const char *); 106 static void free_cache(struct name_cache *cache); 107 static void list_item_verbose(struct cpio *, struct archive_entry *); 108 static void long_help(void); 109 static const char *lookup_gname(struct cpio *, gid_t gid); 110 static int lookup_gname_helper(struct cpio *, 111 const char **name, id_t gid); 112 static const char *lookup_uname(struct cpio *, uid_t uid); 113 static int lookup_uname_helper(struct cpio *, 114 const char **name, id_t uid); 115 static void mode_in(struct cpio *); 116 static void mode_list(struct cpio *); 117 static void mode_out(struct cpio *); 118 static void mode_pass(struct cpio *, const char *); 119 static int restore_time(struct cpio *, struct archive_entry *, 120 const char *, int fd); 121 static void usage(void); 122 static void version(void); 123 124 int 125 main(int argc, char *argv[]) 126 { 127 static char buff[16384]; 128 struct cpio _cpio; /* Allocated on stack. */ 129 struct cpio *cpio; 130 const char *errmsg; 131 int uid, gid; 132 int opt; 133 134 cpio = &_cpio; 135 memset(cpio, 0, sizeof(*cpio)); 136 cpio->buff = buff; 137 cpio->buff_size = sizeof(buff); 138 139 /* Need lafe_progname before calling lafe_warnc. */ 140 if (*argv == NULL) 141 lafe_progname = "bsdcpio"; 142 else { 143 #if defined(_WIN32) && !defined(__CYGWIN__) 144 lafe_progname = strrchr(*argv, '\\'); 145 #else 146 lafe_progname = strrchr(*argv, '/'); 147 #endif 148 if (lafe_progname != NULL) 149 lafe_progname++; 150 else 151 lafe_progname = *argv; 152 } 153 154 cpio->uid_override = -1; 155 cpio->gid_override = -1; 156 cpio->argv = argv; 157 cpio->argc = argc; 158 cpio->mode = '\0'; 159 cpio->verbose = 0; 160 cpio->compress = '\0'; 161 cpio->extract_flags = ARCHIVE_EXTRACT_NO_AUTODIR; 162 cpio->extract_flags |= ARCHIVE_EXTRACT_NO_OVERWRITE_NEWER; 163 cpio->extract_flags |= ARCHIVE_EXTRACT_SECURE_SYMLINKS; 164 cpio->extract_flags |= ARCHIVE_EXTRACT_SECURE_NODOTDOT; 165 cpio->extract_flags |= ARCHIVE_EXTRACT_PERM; 166 cpio->extract_flags |= ARCHIVE_EXTRACT_FFLAGS; 167 cpio->extract_flags |= ARCHIVE_EXTRACT_ACL; 168 #if !defined(_WIN32) && !defined(__CYGWIN__) 169 if (geteuid() == 0) 170 cpio->extract_flags |= ARCHIVE_EXTRACT_OWNER; 171 #endif 172 cpio->bytes_per_block = 512; 173 cpio->filename = NULL; 174 175 while ((opt = cpio_getopt(cpio)) != -1) { 176 switch (opt) { 177 case '0': /* GNU convention: --null, -0 */ 178 cpio->option_null = 1; 179 break; 180 case 'A': /* NetBSD/OpenBSD */ 181 cpio->option_append = 1; 182 break; 183 case 'a': /* POSIX 1997 */ 184 cpio->option_atime_restore = 1; 185 break; 186 case 'B': /* POSIX 1997 */ 187 cpio->bytes_per_block = 5120; 188 break; 189 case 'C': /* NetBSD/OpenBSD */ 190 cpio->bytes_per_block = atoi(cpio->optarg); 191 if (cpio->bytes_per_block <= 0) 192 lafe_errc(1, 0, "Invalid blocksize %s", cpio->optarg); 193 break; 194 case 'c': /* POSIX 1997 */ 195 cpio->format = "odc"; 196 break; 197 case 'd': /* POSIX 1997 */ 198 cpio->extract_flags &= ~ARCHIVE_EXTRACT_NO_AUTODIR; 199 break; 200 case 'E': /* NetBSD/OpenBSD */ 201 lafe_include_from_file(&cpio->matching, 202 cpio->optarg, cpio->option_null); 203 break; 204 case 'F': /* NetBSD/OpenBSD/GNU cpio */ 205 cpio->filename = cpio->optarg; 206 break; 207 case 'f': /* POSIX 1997 */ 208 lafe_exclude(&cpio->matching, cpio->optarg); 209 break; 210 case 'H': /* GNU cpio (also --format) */ 211 cpio->format = cpio->optarg; 212 break; 213 case 'h': 214 long_help(); 215 break; 216 case 'I': /* NetBSD/OpenBSD */ 217 cpio->filename = cpio->optarg; 218 break; 219 case 'i': /* POSIX 1997 */ 220 if (cpio->mode != '\0') 221 lafe_errc(1, 0, 222 "Cannot use both -i and -%c", cpio->mode); 223 cpio->mode = opt; 224 break; 225 case 'J': /* GNU tar, others */ 226 cpio->compress = opt; 227 break; 228 case 'j': /* GNU tar, others */ 229 cpio->compress = opt; 230 break; 231 case OPTION_INSECURE: 232 cpio->extract_flags &= ~ARCHIVE_EXTRACT_SECURE_SYMLINKS; 233 cpio->extract_flags &= ~ARCHIVE_EXTRACT_SECURE_NODOTDOT; 234 break; 235 case 'L': /* GNU cpio */ 236 cpio->option_follow_links = 1; 237 break; 238 case 'l': /* POSIX 1997 */ 239 cpio->option_link = 1; 240 break; 241 case OPTION_LZMA: /* GNU tar, others */ 242 cpio->compress = opt; 243 break; 244 case 'm': /* POSIX 1997 */ 245 cpio->extract_flags |= ARCHIVE_EXTRACT_TIME; 246 break; 247 case 'n': /* GNU cpio */ 248 cpio->option_numeric_uid_gid = 1; 249 break; 250 case OPTION_NO_PRESERVE_OWNER: /* GNU cpio */ 251 cpio->extract_flags &= ~ARCHIVE_EXTRACT_OWNER; 252 break; 253 case 'O': /* GNU cpio */ 254 cpio->filename = cpio->optarg; 255 break; 256 case 'o': /* POSIX 1997 */ 257 if (cpio->mode != '\0') 258 lafe_errc(1, 0, 259 "Cannot use both -o and -%c", cpio->mode); 260 cpio->mode = opt; 261 break; 262 case 'p': /* POSIX 1997 */ 263 if (cpio->mode != '\0') 264 lafe_errc(1, 0, 265 "Cannot use both -p and -%c", cpio->mode); 266 cpio->mode = opt; 267 cpio->extract_flags &= ~ARCHIVE_EXTRACT_SECURE_NODOTDOT; 268 break; 269 case OPTION_PRESERVE_OWNER: 270 cpio->extract_flags |= ARCHIVE_EXTRACT_OWNER; 271 break; 272 case OPTION_QUIET: /* GNU cpio */ 273 cpio->quiet = 1; 274 break; 275 case 'R': /* GNU cpio, also --owner */ 276 errmsg = owner_parse(cpio->optarg, &uid, &gid); 277 if (errmsg) { 278 lafe_warnc(-1, "%s", errmsg); 279 usage(); 280 } 281 if (uid != -1) 282 cpio->uid_override = uid; 283 if (gid != -1) 284 cpio->gid_override = gid; 285 break; 286 case 'r': /* POSIX 1997 */ 287 cpio->option_rename = 1; 288 break; 289 case 't': /* POSIX 1997 */ 290 cpio->option_list = 1; 291 break; 292 case 'u': /* POSIX 1997 */ 293 cpio->extract_flags 294 &= ~ARCHIVE_EXTRACT_NO_OVERWRITE_NEWER; 295 break; 296 case 'v': /* POSIX 1997 */ 297 cpio->verbose++; 298 break; 299 case OPTION_VERSION: /* GNU convention */ 300 version(); 301 break; 302 #if 0 303 /* 304 * cpio_getopt() handles -W specially, so it's not 305 * available here. 306 */ 307 case 'W': /* Obscure, but useful GNU convention. */ 308 break; 309 #endif 310 case 'y': /* tar convention */ 311 cpio->compress = opt; 312 break; 313 case 'Z': /* tar convention */ 314 cpio->compress = opt; 315 break; 316 case 'z': /* tar convention */ 317 cpio->compress = opt; 318 break; 319 default: 320 usage(); 321 } 322 } 323 324 /* 325 * Sanity-check args, error out on nonsensical combinations. 326 */ 327 /* -t implies -i if no mode was specified. */ 328 if (cpio->option_list && cpio->mode == '\0') 329 cpio->mode = 'i'; 330 /* -t requires -i */ 331 if (cpio->option_list && cpio->mode != 'i') 332 lafe_errc(1, 0, "Option -t requires -i"); 333 /* -n requires -it */ 334 if (cpio->option_numeric_uid_gid && !cpio->option_list) 335 lafe_errc(1, 0, "Option -n requires -it"); 336 /* Can only specify format when writing */ 337 if (cpio->format != NULL && cpio->mode != 'o') 338 lafe_errc(1, 0, "Option --format requires -o"); 339 /* -l requires -p */ 340 if (cpio->option_link && cpio->mode != 'p') 341 lafe_errc(1, 0, "Option -l requires -p"); 342 /* TODO: Flag other nonsensical combinations. */ 343 344 switch (cpio->mode) { 345 case 'o': 346 /* TODO: Implement old binary format in libarchive, 347 use that here. */ 348 if (cpio->format == NULL) 349 cpio->format = "odc"; /* Default format */ 350 351 mode_out(cpio); 352 break; 353 case 'i': 354 while (*cpio->argv != NULL) { 355 lafe_include(&cpio->matching, *cpio->argv); 356 --cpio->argc; 357 ++cpio->argv; 358 } 359 if (cpio->option_list) 360 mode_list(cpio); 361 else 362 mode_in(cpio); 363 break; 364 case 'p': 365 if (*cpio->argv == NULL || **cpio->argv == '\0') 366 lafe_errc(1, 0, 367 "-p mode requires a target directory"); 368 mode_pass(cpio, *cpio->argv); 369 break; 370 default: 371 lafe_errc(1, 0, 372 "Must specify at least one of -i, -o, or -p"); 373 } 374 375 free_cache(cpio->gname_cache); 376 free_cache(cpio->uname_cache); 377 return (cpio->return_value); 378 } 379 380 static void 381 usage(void) 382 { 383 const char *p; 384 385 p = lafe_progname; 386 387 fprintf(stderr, "Brief Usage:\n"); 388 fprintf(stderr, " List: %s -it < archive\n", p); 389 fprintf(stderr, " Extract: %s -i < archive\n", p); 390 fprintf(stderr, " Create: %s -o < filenames > archive\n", p); 391 fprintf(stderr, " Help: %s --help\n", p); 392 exit(1); 393 } 394 395 static const char *long_help_msg = 396 "First option must be a mode specifier:\n" 397 " -i Input -o Output -p Pass\n" 398 "Common Options:\n" 399 " -v Verbose\n" 400 "Create: %p -o [options] < [list of files] > [archive]\n" 401 " -J,-y,-z,--lzma Compress archive with xz/bzip2/gzip/lzma\n" 402 " --format {odc|newc|ustar} Select archive format\n" 403 "List: %p -it < [archive]\n" 404 "Extract: %p -i [options] < [archive]\n"; 405 406 407 /* 408 * Note that the word 'bsdcpio' will always appear in the first line 409 * of output. 410 * 411 * In particular, /bin/sh scripts that need to test for the presence 412 * of bsdcpio can use the following template: 413 * 414 * if (cpio --help 2>&1 | grep bsdcpio >/dev/null 2>&1 ) then \ 415 * echo bsdcpio; else echo not bsdcpio; fi 416 */ 417 static void 418 long_help(void) 419 { 420 const char *prog; 421 const char *p; 422 423 prog = lafe_progname; 424 425 fflush(stderr); 426 427 p = (strcmp(prog,"bsdcpio") != 0) ? "(bsdcpio)" : ""; 428 printf("%s%s: manipulate archive files\n", prog, p); 429 430 for (p = long_help_msg; *p != '\0'; p++) { 431 if (*p == '%') { 432 if (p[1] == 'p') { 433 fputs(prog, stdout); 434 p++; 435 } else 436 putchar('%'); 437 } else 438 putchar(*p); 439 } 440 version(); 441 } 442 443 static void 444 version(void) 445 { 446 fprintf(stdout,"bsdcpio %s -- %s\n", 447 BSDCPIO_VERSION_STRING, 448 archive_version()); 449 exit(0); 450 } 451 452 static void 453 mode_out(struct cpio *cpio) 454 { 455 struct archive_entry *entry, *spare; 456 struct lafe_line_reader *lr; 457 const char *p; 458 int r; 459 460 if (cpio->option_append) 461 lafe_errc(1, 0, "Append mode not yet supported."); 462 463 cpio->archive_read_disk = archive_read_disk_new(); 464 if (cpio->archive_read_disk == NULL) 465 lafe_errc(1, 0, "Failed to allocate archive object"); 466 if (cpio->option_follow_links) 467 archive_read_disk_set_symlink_logical(cpio->archive_read_disk); 468 else 469 archive_read_disk_set_symlink_physical(cpio->archive_read_disk); 470 archive_read_disk_set_standard_lookup(cpio->archive_read_disk); 471 472 cpio->archive = archive_write_new(); 473 if (cpio->archive == NULL) 474 lafe_errc(1, 0, "Failed to allocate archive object"); 475 switch (cpio->compress) { 476 case 'J': 477 r = archive_write_set_compression_xz(cpio->archive); 478 break; 479 case OPTION_LZMA: 480 r = archive_write_set_compression_lzma(cpio->archive); 481 break; 482 case 'j': case 'y': 483 r = archive_write_set_compression_bzip2(cpio->archive); 484 break; 485 case 'z': 486 r = archive_write_set_compression_gzip(cpio->archive); 487 break; 488 case 'Z': 489 r = archive_write_set_compression_compress(cpio->archive); 490 break; 491 default: 492 r = archive_write_set_compression_none(cpio->archive); 493 break; 494 } 495 if (r < ARCHIVE_WARN) 496 lafe_errc(1, 0, "Requested compression not available"); 497 r = archive_write_set_format_by_name(cpio->archive, cpio->format); 498 if (r != ARCHIVE_OK) 499 lafe_errc(1, 0, "%s", archive_error_string(cpio->archive)); 500 archive_write_set_bytes_per_block(cpio->archive, cpio->bytes_per_block); 501 cpio->linkresolver = archive_entry_linkresolver_new(); 502 archive_entry_linkresolver_set_strategy(cpio->linkresolver, 503 archive_format(cpio->archive)); 504 505 /* 506 * The main loop: Copy each file into the output archive. 507 */ 508 r = archive_write_open_file(cpio->archive, cpio->filename); 509 if (r != ARCHIVE_OK) 510 lafe_errc(1, 0, "%s", archive_error_string(cpio->archive)); 511 lr = lafe_line_reader("-", cpio->option_null); 512 while ((p = lafe_line_reader_next(lr)) != NULL) 513 file_to_archive(cpio, p); 514 lafe_line_reader_free(lr); 515 516 /* 517 * The hardlink detection may have queued up a couple of entries 518 * that can now be flushed. 519 */ 520 entry = NULL; 521 archive_entry_linkify(cpio->linkresolver, &entry, &spare); 522 while (entry != NULL) { 523 entry_to_archive(cpio, entry); 524 archive_entry_free(entry); 525 entry = NULL; 526 archive_entry_linkify(cpio->linkresolver, &entry, &spare); 527 } 528 529 r = archive_write_close(cpio->archive); 530 if (r != ARCHIVE_OK) 531 lafe_errc(1, 0, "%s", archive_error_string(cpio->archive)); 532 533 if (!cpio->quiet) { 534 int64_t blocks = 535 (archive_position_uncompressed(cpio->archive) + 511) 536 / 512; 537 fprintf(stderr, "%lu %s\n", (unsigned long)blocks, 538 blocks == 1 ? "block" : "blocks"); 539 } 540 archive_write_finish(cpio->archive); 541 } 542 543 /* 544 * This is used by both out mode (to copy objects from disk into 545 * an archive) and pass mode (to copy objects from disk to 546 * an archive_write_disk "archive"). 547 */ 548 static int 549 file_to_archive(struct cpio *cpio, const char *srcpath) 550 { 551 const char *destpath; 552 struct archive_entry *entry, *spare; 553 size_t len; 554 const char *p; 555 int r; 556 557 /* 558 * Create an archive_entry describing the source file. 559 * 560 */ 561 entry = archive_entry_new(); 562 if (entry == NULL) 563 lafe_errc(1, 0, "Couldn't allocate entry"); 564 archive_entry_copy_sourcepath(entry, srcpath); 565 r = archive_read_disk_entry_from_file(cpio->archive_read_disk, 566 entry, -1, NULL); 567 if (r < ARCHIVE_FAILED) 568 lafe_errc(1, 0, "%s", 569 archive_error_string(cpio->archive_read_disk)); 570 if (r < ARCHIVE_OK) 571 lafe_warnc(0, "%s", 572 archive_error_string(cpio->archive_read_disk)); 573 if (r <= ARCHIVE_FAILED) { 574 cpio->return_value = 1; 575 return (r); 576 } 577 578 if (cpio->uid_override >= 0) 579 archive_entry_set_uid(entry, cpio->uid_override); 580 if (cpio->gid_override >= 0) 581 archive_entry_set_gid(entry, cpio->gid_override); 582 583 /* 584 * Generate a destination path for this entry. 585 * "destination path" is the name to which it will be copied in 586 * pass mode or the name that will go into the archive in 587 * output mode. 588 */ 589 destpath = srcpath; 590 if (cpio->destdir) { 591 len = strlen(cpio->destdir) + strlen(srcpath) + 8; 592 if (len >= cpio->pass_destpath_alloc) { 593 while (len >= cpio->pass_destpath_alloc) { 594 cpio->pass_destpath_alloc += 512; 595 cpio->pass_destpath_alloc *= 2; 596 } 597 free(cpio->pass_destpath); 598 cpio->pass_destpath = malloc(cpio->pass_destpath_alloc); 599 if (cpio->pass_destpath == NULL) 600 lafe_errc(1, ENOMEM, 601 "Can't allocate path buffer"); 602 } 603 strcpy(cpio->pass_destpath, cpio->destdir); 604 p = srcpath; 605 while (p[0] == '/') 606 ++p; 607 strcat(cpio->pass_destpath, p); 608 destpath = cpio->pass_destpath; 609 } 610 if (cpio->option_rename) 611 destpath = cpio_rename(destpath); 612 if (destpath == NULL) 613 return (0); 614 archive_entry_copy_pathname(entry, destpath); 615 616 /* 617 * If we're trying to preserve hardlinks, match them here. 618 */ 619 spare = NULL; 620 if (cpio->linkresolver != NULL 621 && archive_entry_filetype(entry) != AE_IFDIR) { 622 archive_entry_linkify(cpio->linkresolver, &entry, &spare); 623 } 624 625 if (entry != NULL) { 626 r = entry_to_archive(cpio, entry); 627 archive_entry_free(entry); 628 if (spare != NULL) { 629 if (r == 0) 630 r = entry_to_archive(cpio, spare); 631 archive_entry_free(spare); 632 } 633 } 634 return (r); 635 } 636 637 static int 638 entry_to_archive(struct cpio *cpio, struct archive_entry *entry) 639 { 640 const char *destpath = archive_entry_pathname(entry); 641 const char *srcpath = archive_entry_sourcepath(entry); 642 int fd = -1; 643 ssize_t bytes_read; 644 int r; 645 646 /* Print out the destination name to the user. */ 647 if (cpio->verbose) 648 fprintf(stderr,"%s", destpath); 649 650 /* 651 * Option_link only makes sense in pass mode and for 652 * regular files. Also note: if a link operation fails 653 * because of cross-device restrictions, we'll fall back 654 * to copy mode for that entry. 655 * 656 * TODO: Test other cpio implementations to see if they 657 * hard-link anything other than regular files here. 658 */ 659 if (cpio->option_link 660 && archive_entry_filetype(entry) == AE_IFREG) 661 { 662 struct archive_entry *t; 663 /* Save the original entry in case we need it later. */ 664 t = archive_entry_clone(entry); 665 if (t == NULL) 666 lafe_errc(1, ENOMEM, "Can't create link"); 667 /* Note: link(2) doesn't create parent directories, 668 * so we use archive_write_header() instead as a 669 * convenience. */ 670 archive_entry_set_hardlink(t, srcpath); 671 /* This is a straight link that carries no data. */ 672 archive_entry_set_size(t, 0); 673 r = archive_write_header(cpio->archive, t); 674 archive_entry_free(t); 675 if (r != ARCHIVE_OK) 676 lafe_warnc(archive_errno(cpio->archive), 677 "%s", archive_error_string(cpio->archive)); 678 if (r == ARCHIVE_FATAL) 679 exit(1); 680 #ifdef EXDEV 681 if (r != ARCHIVE_OK && archive_errno(cpio->archive) == EXDEV) { 682 /* Cross-device link: Just fall through and use 683 * the original entry to copy the file over. */ 684 lafe_warnc(0, "Copying file instead"); 685 } else 686 #endif 687 return (0); 688 } 689 690 /* 691 * Make sure we can open the file (if necessary) before 692 * trying to write the header. 693 */ 694 if (archive_entry_filetype(entry) == AE_IFREG) { 695 if (archive_entry_size(entry) > 0) { 696 fd = open(srcpath, O_RDONLY | O_BINARY); 697 if (fd < 0) { 698 lafe_warnc(errno, 699 "%s: could not open file", srcpath); 700 goto cleanup; 701 } 702 } 703 } else { 704 archive_entry_set_size(entry, 0); 705 } 706 707 r = archive_write_header(cpio->archive, entry); 708 709 if (r != ARCHIVE_OK) 710 lafe_warnc(archive_errno(cpio->archive), 711 "%s: %s", 712 srcpath, 713 archive_error_string(cpio->archive)); 714 715 if (r == ARCHIVE_FATAL) 716 exit(1); 717 718 if (r >= ARCHIVE_WARN && fd >= 0) { 719 bytes_read = read(fd, cpio->buff, cpio->buff_size); 720 while (bytes_read > 0) { 721 r = archive_write_data(cpio->archive, 722 cpio->buff, bytes_read); 723 if (r < 0) 724 lafe_errc(1, archive_errno(cpio->archive), 725 "%s", archive_error_string(cpio->archive)); 726 if (r < bytes_read) { 727 lafe_warnc(0, 728 "Truncated write; file may have grown while being archived."); 729 } 730 bytes_read = read(fd, cpio->buff, cpio->buff_size); 731 } 732 } 733 734 fd = restore_time(cpio, entry, srcpath, fd); 735 736 cleanup: 737 if (cpio->verbose) 738 fprintf(stderr,"\n"); 739 if (fd >= 0) 740 close(fd); 741 return (0); 742 } 743 744 static int 745 restore_time(struct cpio *cpio, struct archive_entry *entry, 746 const char *name, int fd) 747 { 748 #ifndef HAVE_UTIMES 749 static int warned = 0; 750 751 (void)cpio; /* UNUSED */ 752 (void)entry; /* UNUSED */ 753 (void)name; /* UNUSED */ 754 755 if (!warned) 756 lafe_warnc(0, "Can't restore access times on this platform"); 757 warned = 1; 758 return (fd); 759 #else 760 #if defined(_WIN32) && !defined(__CYGWIN__) 761 struct __timeval times[2]; 762 #else 763 struct timeval times[2]; 764 #endif 765 766 if (!cpio->option_atime_restore) 767 return (fd); 768 769 times[1].tv_sec = archive_entry_mtime(entry); 770 times[1].tv_usec = archive_entry_mtime_nsec(entry) / 1000; 771 772 times[0].tv_sec = archive_entry_atime(entry); 773 times[0].tv_usec = archive_entry_atime_nsec(entry) / 1000; 774 775 #if defined(HAVE_FUTIMES) && !defined(__CYGWIN__) 776 if (fd >= 0 && futimes(fd, times) == 0) 777 return (fd); 778 #endif 779 /* 780 * Some platform cannot restore access times if the file descriptor 781 * is still opened. 782 */ 783 if (fd >= 0) { 784 close(fd); 785 fd = -1; 786 } 787 788 #ifdef HAVE_LUTIMES 789 if (lutimes(name, times) != 0) 790 #else 791 if ((AE_IFLNK != archive_entry_filetype(entry)) 792 && utimes(name, times) != 0) 793 #endif 794 lafe_warnc(errno, "Can't update time for %s", name); 795 #endif 796 return (fd); 797 } 798 799 800 static void 801 mode_in(struct cpio *cpio) 802 { 803 struct archive *a; 804 struct archive_entry *entry; 805 struct archive *ext; 806 const char *destpath; 807 int r; 808 809 ext = archive_write_disk_new(); 810 if (ext == NULL) 811 lafe_errc(1, 0, "Couldn't allocate restore object"); 812 r = archive_write_disk_set_options(ext, cpio->extract_flags); 813 if (r != ARCHIVE_OK) 814 lafe_errc(1, 0, "%s", archive_error_string(ext)); 815 a = archive_read_new(); 816 if (a == NULL) 817 lafe_errc(1, 0, "Couldn't allocate archive object"); 818 archive_read_support_compression_all(a); 819 archive_read_support_format_all(a); 820 821 if (archive_read_open_file(a, cpio->filename, cpio->bytes_per_block)) 822 lafe_errc(1, archive_errno(a), 823 "%s", archive_error_string(a)); 824 for (;;) { 825 r = archive_read_next_header(a, &entry); 826 if (r == ARCHIVE_EOF) 827 break; 828 if (r != ARCHIVE_OK) { 829 lafe_errc(1, archive_errno(a), 830 "%s", archive_error_string(a)); 831 } 832 if (lafe_excluded(cpio->matching, archive_entry_pathname(entry))) 833 continue; 834 if (cpio->option_rename) { 835 destpath = cpio_rename(archive_entry_pathname(entry)); 836 archive_entry_set_pathname(entry, destpath); 837 } else 838 destpath = archive_entry_pathname(entry); 839 if (destpath == NULL) 840 continue; 841 if (cpio->verbose) 842 fprintf(stdout, "%s\n", destpath); 843 if (cpio->uid_override >= 0) 844 archive_entry_set_uid(entry, cpio->uid_override); 845 if (cpio->gid_override >= 0) 846 archive_entry_set_gid(entry, cpio->gid_override); 847 r = archive_write_header(ext, entry); 848 if (r != ARCHIVE_OK) { 849 fprintf(stderr, "%s: %s\n", 850 archive_entry_pathname(entry), 851 archive_error_string(ext)); 852 } else if (archive_entry_size(entry) > 0) { 853 r = extract_data(a, ext); 854 if (r != ARCHIVE_OK) 855 cpio->return_value = 1; 856 } 857 } 858 r = archive_read_close(a); 859 if (r != ARCHIVE_OK) 860 lafe_errc(1, 0, "%s", archive_error_string(a)); 861 r = archive_write_close(ext); 862 if (r != ARCHIVE_OK) 863 lafe_errc(1, 0, "%s", archive_error_string(ext)); 864 if (!cpio->quiet) { 865 int64_t blocks = (archive_position_uncompressed(a) + 511) 866 / 512; 867 fprintf(stderr, "%lu %s\n", (unsigned long)blocks, 868 blocks == 1 ? "block" : "blocks"); 869 } 870 archive_read_finish(a); 871 archive_write_finish(ext); 872 exit(cpio->return_value); 873 } 874 875 /* 876 * Exits if there's a fatal error. Returns ARCHIVE_OK 877 * if everything is kosher. 878 */ 879 static int 880 extract_data(struct archive *ar, struct archive *aw) 881 { 882 int r; 883 size_t size; 884 const void *block; 885 off_t offset; 886 887 for (;;) { 888 r = archive_read_data_block(ar, &block, &size, &offset); 889 if (r == ARCHIVE_EOF) 890 return (ARCHIVE_OK); 891 if (r != ARCHIVE_OK) { 892 lafe_warnc(archive_errno(ar), 893 "%s", archive_error_string(ar)); 894 exit(1); 895 } 896 r = archive_write_data_block(aw, block, size, offset); 897 if (r != ARCHIVE_OK) { 898 lafe_warnc(archive_errno(aw), 899 "%s", archive_error_string(aw)); 900 return (r); 901 } 902 } 903 } 904 905 static void 906 mode_list(struct cpio *cpio) 907 { 908 struct archive *a; 909 struct archive_entry *entry; 910 int r; 911 912 a = archive_read_new(); 913 if (a == NULL) 914 lafe_errc(1, 0, "Couldn't allocate archive object"); 915 archive_read_support_compression_all(a); 916 archive_read_support_format_all(a); 917 918 if (archive_read_open_file(a, cpio->filename, cpio->bytes_per_block)) 919 lafe_errc(1, archive_errno(a), 920 "%s", archive_error_string(a)); 921 for (;;) { 922 r = archive_read_next_header(a, &entry); 923 if (r == ARCHIVE_EOF) 924 break; 925 if (r != ARCHIVE_OK) { 926 lafe_errc(1, archive_errno(a), 927 "%s", archive_error_string(a)); 928 } 929 if (lafe_excluded(cpio->matching, archive_entry_pathname(entry))) 930 continue; 931 if (cpio->verbose) 932 list_item_verbose(cpio, entry); 933 else 934 fprintf(stdout, "%s\n", archive_entry_pathname(entry)); 935 } 936 r = archive_read_close(a); 937 if (r != ARCHIVE_OK) 938 lafe_errc(1, 0, "%s", archive_error_string(a)); 939 if (!cpio->quiet) { 940 int64_t blocks = (archive_position_uncompressed(a) + 511) 941 / 512; 942 fprintf(stderr, "%lu %s\n", (unsigned long)blocks, 943 blocks == 1 ? "block" : "blocks"); 944 } 945 archive_read_finish(a); 946 exit(0); 947 } 948 949 /* 950 * Display information about the current file. 951 * 952 * The format here roughly duplicates the output of 'ls -l'. 953 * This is based on SUSv2, where 'tar tv' is documented as 954 * listing additional information in an "unspecified format," 955 * and 'pax -l' is documented as using the same format as 'ls -l'. 956 */ 957 static void 958 list_item_verbose(struct cpio *cpio, struct archive_entry *entry) 959 { 960 char size[32]; 961 char date[32]; 962 char uids[16], gids[16]; 963 const char *uname, *gname; 964 FILE *out = stdout; 965 const char *fmt; 966 time_t mtime; 967 static time_t now; 968 969 if (!now) 970 time(&now); 971 972 if (cpio->option_numeric_uid_gid) { 973 /* Format numeric uid/gid for display. */ 974 strcpy(uids, cpio_i64toa(archive_entry_uid(entry))); 975 uname = uids; 976 strcpy(gids, cpio_i64toa(archive_entry_gid(entry))); 977 gname = gids; 978 } else { 979 /* Use uname if it's present, else lookup name from uid. */ 980 uname = archive_entry_uname(entry); 981 if (uname == NULL) 982 uname = lookup_uname(cpio, archive_entry_uid(entry)); 983 /* Use gname if it's present, else lookup name from gid. */ 984 gname = archive_entry_gname(entry); 985 if (gname == NULL) 986 gname = lookup_gname(cpio, archive_entry_gid(entry)); 987 } 988 989 /* Print device number or file size. */ 990 if (archive_entry_filetype(entry) == AE_IFCHR 991 || archive_entry_filetype(entry) == AE_IFBLK) { 992 snprintf(size, sizeof(size), "%lu,%lu", 993 (unsigned long)archive_entry_rdevmajor(entry), 994 (unsigned long)archive_entry_rdevminor(entry)); 995 } else { 996 strcpy(size, cpio_i64toa(archive_entry_size(entry))); 997 } 998 999 /* Format the time using 'ls -l' conventions. */ 1000 mtime = archive_entry_mtime(entry); 1001 #if defined(_WIN32) && !defined(__CYGWIN__) 1002 /* Windows' strftime function does not support %e format. */ 1003 if (mtime - now > 365*86400/2 1004 || mtime - now < -365*86400/2) 1005 fmt = cpio->day_first ? "%d %b %Y" : "%b %d %Y"; 1006 else 1007 fmt = cpio->day_first ? "%d %b %H:%M" : "%b %d %H:%M"; 1008 #else 1009 if (abs(mtime - now) > (365/2)*86400) 1010 fmt = cpio->day_first ? "%e %b %Y" : "%b %e %Y"; 1011 else 1012 fmt = cpio->day_first ? "%e %b %H:%M" : "%b %e %H:%M"; 1013 #endif 1014 strftime(date, sizeof(date), fmt, localtime(&mtime)); 1015 1016 fprintf(out, "%s%3d %-8s %-8s %8s %12s %s", 1017 archive_entry_strmode(entry), 1018 archive_entry_nlink(entry), 1019 uname, gname, size, date, 1020 archive_entry_pathname(entry)); 1021 1022 /* Extra information for links. */ 1023 if (archive_entry_hardlink(entry)) /* Hard link */ 1024 fprintf(out, " link to %s", archive_entry_hardlink(entry)); 1025 else if (archive_entry_symlink(entry)) /* Symbolic link */ 1026 fprintf(out, " -> %s", archive_entry_symlink(entry)); 1027 fprintf(out, "\n"); 1028 } 1029 1030 static void 1031 mode_pass(struct cpio *cpio, const char *destdir) 1032 { 1033 struct lafe_line_reader *lr; 1034 const char *p; 1035 int r; 1036 1037 /* Ensure target dir has a trailing '/' to simplify path surgery. */ 1038 cpio->destdir = malloc(strlen(destdir) + 8); 1039 strcpy(cpio->destdir, destdir); 1040 if (destdir[strlen(destdir) - 1] != '/') 1041 strcat(cpio->destdir, "/"); 1042 1043 cpio->archive = archive_write_disk_new(); 1044 if (cpio->archive == NULL) 1045 lafe_errc(1, 0, "Failed to allocate archive object"); 1046 r = archive_write_disk_set_options(cpio->archive, cpio->extract_flags); 1047 if (r != ARCHIVE_OK) 1048 lafe_errc(1, 0, "%s", archive_error_string(cpio->archive)); 1049 cpio->linkresolver = archive_entry_linkresolver_new(); 1050 archive_write_disk_set_standard_lookup(cpio->archive); 1051 1052 cpio->archive_read_disk = archive_read_disk_new(); 1053 if (cpio->archive_read_disk == NULL) 1054 lafe_errc(1, 0, "Failed to allocate archive object"); 1055 if (cpio->option_follow_links) 1056 archive_read_disk_set_symlink_logical(cpio->archive_read_disk); 1057 else 1058 archive_read_disk_set_symlink_physical(cpio->archive_read_disk); 1059 archive_read_disk_set_standard_lookup(cpio->archive_read_disk); 1060 1061 lr = lafe_line_reader("-", cpio->option_null); 1062 while ((p = lafe_line_reader_next(lr)) != NULL) 1063 file_to_archive(cpio, p); 1064 lafe_line_reader_free(lr); 1065 1066 archive_entry_linkresolver_free(cpio->linkresolver); 1067 r = archive_write_close(cpio->archive); 1068 if (r != ARCHIVE_OK) 1069 lafe_errc(1, 0, "%s", archive_error_string(cpio->archive)); 1070 1071 if (!cpio->quiet) { 1072 int64_t blocks = 1073 (archive_position_uncompressed(cpio->archive) + 511) 1074 / 512; 1075 fprintf(stderr, "%lu %s\n", (unsigned long)blocks, 1076 blocks == 1 ? "block" : "blocks"); 1077 } 1078 1079 archive_write_finish(cpio->archive); 1080 } 1081 1082 /* 1083 * Prompt for a new name for this entry. Returns a pointer to the 1084 * new name or NULL if the entry should not be copied. This 1085 * implements the semantics defined in POSIX.1-1996, which specifies 1086 * that an input of '.' means the name should be unchanged. GNU cpio 1087 * treats '.' as a literal new name. 1088 */ 1089 static const char * 1090 cpio_rename(const char *name) 1091 { 1092 static char buff[1024]; 1093 FILE *t; 1094 char *p, *ret; 1095 1096 t = fopen("/dev/tty", "r+"); 1097 if (t == NULL) 1098 return (name); 1099 fprintf(t, "%s (Enter/./(new name))? ", name); 1100 fflush(t); 1101 1102 p = fgets(buff, sizeof(buff), t); 1103 fclose(t); 1104 if (p == NULL) 1105 /* End-of-file is a blank line. */ 1106 return (NULL); 1107 1108 while (*p == ' ' || *p == '\t') 1109 ++p; 1110 if (*p == '\n' || *p == '\0') 1111 /* Empty line. */ 1112 return (NULL); 1113 if (*p == '.' && p[1] == '\n') 1114 /* Single period preserves original name. */ 1115 return (name); 1116 ret = p; 1117 /* Trim the final newline. */ 1118 while (*p != '\0' && *p != '\n') 1119 ++p; 1120 /* Overwrite the final \n with a null character. */ 1121 *p = '\0'; 1122 return (ret); 1123 } 1124 1125 static void 1126 free_cache(struct name_cache *cache) 1127 { 1128 size_t i; 1129 1130 if (cache != NULL) { 1131 for (i = 0; i < cache->size; i++) 1132 free(cache->cache[i].name); 1133 free(cache); 1134 } 1135 } 1136 1137 /* 1138 * Lookup uname/gname from uid/gid, return NULL if no match. 1139 */ 1140 static const char * 1141 lookup_name(struct cpio *cpio, struct name_cache **name_cache_variable, 1142 int (*lookup_fn)(struct cpio *, const char **, id_t), id_t id) 1143 { 1144 char asnum[16]; 1145 struct name_cache *cache; 1146 const char *name; 1147 int slot; 1148 1149 1150 if (*name_cache_variable == NULL) { 1151 *name_cache_variable = malloc(sizeof(struct name_cache)); 1152 if (*name_cache_variable == NULL) 1153 lafe_errc(1, ENOMEM, "No more memory"); 1154 memset(*name_cache_variable, 0, sizeof(struct name_cache)); 1155 (*name_cache_variable)->size = name_cache_size; 1156 } 1157 1158 cache = *name_cache_variable; 1159 cache->probes++; 1160 1161 slot = id % cache->size; 1162 if (cache->cache[slot].name != NULL) { 1163 if (cache->cache[slot].id == id) { 1164 cache->hits++; 1165 return (cache->cache[slot].name); 1166 } 1167 free(cache->cache[slot].name); 1168 cache->cache[slot].name = NULL; 1169 } 1170 1171 if (lookup_fn(cpio, &name, id) == 0) { 1172 if (name == NULL || name[0] == '\0') { 1173 /* If lookup failed, format it as a number. */ 1174 snprintf(asnum, sizeof(asnum), "%u", (unsigned)id); 1175 name = asnum; 1176 } 1177 cache->cache[slot].name = strdup(name); 1178 if (cache->cache[slot].name != NULL) { 1179 cache->cache[slot].id = id; 1180 return (cache->cache[slot].name); 1181 } 1182 /* 1183 * Conveniently, NULL marks an empty slot, so 1184 * if the strdup() fails, we've just failed to 1185 * cache it. No recovery necessary. 1186 */ 1187 } 1188 return (NULL); 1189 } 1190 1191 static const char * 1192 lookup_uname(struct cpio *cpio, uid_t uid) 1193 { 1194 return (lookup_name(cpio, &cpio->uname_cache, 1195 &lookup_uname_helper, (id_t)uid)); 1196 } 1197 1198 static int 1199 lookup_uname_helper(struct cpio *cpio, const char **name, id_t id) 1200 { 1201 struct passwd *pwent; 1202 1203 (void)cpio; /* UNUSED */ 1204 1205 errno = 0; 1206 pwent = getpwuid((uid_t)id); 1207 if (pwent == NULL) { 1208 *name = NULL; 1209 if (errno != 0 && errno != ENOENT) 1210 lafe_warnc(errno, "getpwuid(%d) failed", id); 1211 return (errno); 1212 } 1213 1214 *name = pwent->pw_name; 1215 return (0); 1216 } 1217 1218 static const char * 1219 lookup_gname(struct cpio *cpio, gid_t gid) 1220 { 1221 return (lookup_name(cpio, &cpio->gname_cache, 1222 &lookup_gname_helper, (id_t)gid)); 1223 } 1224 1225 static int 1226 lookup_gname_helper(struct cpio *cpio, const char **name, id_t id) 1227 { 1228 struct group *grent; 1229 1230 (void)cpio; /* UNUSED */ 1231 1232 errno = 0; 1233 grent = getgrgid((gid_t)id); 1234 if (grent == NULL) { 1235 *name = NULL; 1236 if (errno != 0) 1237 lafe_warnc(errno, "getgrgid(%d) failed", id); 1238 return (errno); 1239 } 1240 1241 *name = grent->gr_name; 1242 return (0); 1243 } 1244 1245 /* 1246 * It would be nice to just use printf() for formatting large numbers, 1247 * but the compatibility problems are a big headache. Hence the 1248 * following simple utility function. 1249 */ 1250 const char * 1251 cpio_i64toa(int64_t n0) 1252 { 1253 // 2^64 =~ 1.8 * 10^19, so 20 decimal digits suffice. 1254 // We also need 1 byte for '-' and 1 for '\0'. 1255 static char buff[22]; 1256 int64_t n = n0 < 0 ? -n0 : n0; 1257 char *p = buff + sizeof(buff); 1258 1259 *--p = '\0'; 1260 do { 1261 *--p = '0' + (int)(n % 10); 1262 n /= 10; 1263 } while (n > 0); 1264 if (n0 < 0) 1265 *--p = '-'; 1266 return p; 1267 } 1268