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("$FreeBSD$"); 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_LOCALE_H 54 #include <locale.h> 55 #endif 56 #ifdef HAVE_PWD_H 57 #include <pwd.h> 58 #endif 59 #ifdef HAVE_SIGNAL_H 60 #include <signal.h> 61 #endif 62 #ifdef HAVE_STDARG_H 63 #include <stdarg.h> 64 #endif 65 #ifdef HAVE_STDINT_H 66 #include <stdint.h> 67 #endif 68 #include <stdio.h> 69 #ifdef HAVE_STDLIB_H 70 #include <stdlib.h> 71 #endif 72 #ifdef HAVE_STRING_H 73 #include <string.h> 74 #endif 75 #ifdef HAVE_UNISTD_H 76 #include <unistd.h> 77 #endif 78 #ifdef HAVE_TIME_H 79 #include <time.h> 80 #endif 81 82 #include "cpio.h" 83 #include "err.h" 84 #include "line_reader.h" 85 #include "passphrase.h" 86 87 /* Fixed size of uname/gname caches. */ 88 #define name_cache_size 101 89 90 #ifndef O_BINARY 91 #define O_BINARY 0 92 #endif 93 94 struct name_cache { 95 int probes; 96 int hits; 97 size_t size; 98 struct { 99 id_t id; 100 char *name; 101 } cache[name_cache_size]; 102 }; 103 104 static int extract_data(struct archive *, struct archive *); 105 const char * cpio_i64toa(int64_t); 106 static const char *cpio_rename(const char *name); 107 static int entry_to_archive(struct cpio *, struct archive_entry *); 108 static int file_to_archive(struct cpio *, const char *); 109 static void free_cache(struct name_cache *cache); 110 static void list_item_verbose(struct cpio *, struct archive_entry *); 111 static void long_help(void) __LA_DEAD; 112 static const char *lookup_gname(struct cpio *, gid_t gid); 113 static int lookup_gname_helper(struct cpio *, 114 const char **name, id_t gid); 115 static const char *lookup_uname(struct cpio *, uid_t uid); 116 static int lookup_uname_helper(struct cpio *, 117 const char **name, id_t uid); 118 static void mode_in(struct cpio *) __LA_DEAD; 119 static void mode_list(struct cpio *) __LA_DEAD; 120 static void mode_out(struct cpio *); 121 static void mode_pass(struct cpio *, const char *); 122 static const char *remove_leading_slash(const char *); 123 static int restore_time(struct cpio *, struct archive_entry *, 124 const char *, int fd); 125 static void usage(void) __LA_DEAD; 126 static void version(void) __LA_DEAD; 127 static const char * passphrase_callback(struct archive *, void *); 128 static void passphrase_free(char *); 129 130 int 131 main(int argc, char *argv[]) 132 { 133 static char buff[16384]; 134 struct cpio _cpio; /* Allocated on stack. */ 135 struct cpio *cpio; 136 const char *errmsg; 137 char *tptr; 138 int uid, gid; 139 int opt, t; 140 141 cpio = &_cpio; 142 memset(cpio, 0, sizeof(*cpio)); 143 cpio->buff = buff; 144 cpio->buff_size = sizeof(buff); 145 146 #if defined(HAVE_SIGACTION) && defined(SIGPIPE) 147 { /* Ignore SIGPIPE signals. */ 148 struct sigaction sa; 149 sigemptyset(&sa.sa_mask); 150 sa.sa_flags = 0; 151 sa.sa_handler = SIG_IGN; 152 sigaction(SIGPIPE, &sa, NULL); 153 } 154 #endif 155 156 /* Set lafe_progname before calling lafe_warnc. */ 157 lafe_setprogname(*argv, "bsdcpio"); 158 159 #if HAVE_SETLOCALE 160 if (setlocale(LC_ALL, "") == NULL) 161 lafe_warnc(0, "Failed to set default locale"); 162 #endif 163 164 cpio->uid_override = -1; 165 cpio->gid_override = -1; 166 cpio->argv = argv; 167 cpio->argc = argc; 168 cpio->mode = '\0'; 169 cpio->verbose = 0; 170 cpio->compress = '\0'; 171 cpio->extract_flags = ARCHIVE_EXTRACT_NO_AUTODIR; 172 cpio->extract_flags |= ARCHIVE_EXTRACT_NO_OVERWRITE_NEWER; 173 cpio->extract_flags |= ARCHIVE_EXTRACT_SECURE_SYMLINKS; 174 cpio->extract_flags |= ARCHIVE_EXTRACT_SECURE_NODOTDOT; 175 cpio->extract_flags |= ARCHIVE_EXTRACT_SECURE_NOABSOLUTEPATHS; 176 cpio->extract_flags |= ARCHIVE_EXTRACT_PERM; 177 cpio->extract_flags |= ARCHIVE_EXTRACT_FFLAGS; 178 cpio->extract_flags |= ARCHIVE_EXTRACT_ACL; 179 #if !defined(_WIN32) && !defined(__CYGWIN__) 180 if (geteuid() == 0) 181 cpio->extract_flags |= ARCHIVE_EXTRACT_OWNER; 182 #endif 183 cpio->bytes_per_block = 512; 184 cpio->filename = NULL; 185 186 cpio->matching = archive_match_new(); 187 if (cpio->matching == NULL) 188 lafe_errc(1, 0, "Out of memory"); 189 190 while ((opt = cpio_getopt(cpio)) != -1) { 191 switch (opt) { 192 case '0': /* GNU convention: --null, -0 */ 193 cpio->option_null = 1; 194 break; 195 case 'A': /* NetBSD/OpenBSD */ 196 cpio->option_append = 1; 197 break; 198 case 'a': /* POSIX 1997 */ 199 cpio->option_atime_restore = 1; 200 break; 201 case 'B': /* POSIX 1997 */ 202 cpio->bytes_per_block = 5120; 203 break; 204 case OPTION_B64ENCODE: 205 cpio->add_filter = opt; 206 break; 207 case 'C': /* NetBSD/OpenBSD */ 208 errno = 0; 209 tptr = NULL; 210 t = (int)strtol(cpio->argument, &tptr, 10); 211 if (errno || t <= 0 || *(cpio->argument) == '\0' || 212 tptr == NULL || *tptr != '\0') { 213 lafe_errc(1, 0, "Invalid blocksize: %s", 214 cpio->argument); 215 } 216 cpio->bytes_per_block = t; 217 break; 218 case 'c': /* POSIX 1997 */ 219 cpio->format = "odc"; 220 break; 221 case 'd': /* POSIX 1997 */ 222 cpio->extract_flags &= ~ARCHIVE_EXTRACT_NO_AUTODIR; 223 break; 224 case 'E': /* NetBSD/OpenBSD */ 225 if (archive_match_include_pattern_from_file( 226 cpio->matching, cpio->argument, 227 cpio->option_null) != ARCHIVE_OK) 228 lafe_errc(1, 0, "Error : %s", 229 archive_error_string(cpio->matching)); 230 break; 231 case 'F': /* NetBSD/OpenBSD/GNU cpio */ 232 cpio->filename = cpio->argument; 233 break; 234 case 'f': /* POSIX 1997 */ 235 if (archive_match_exclude_pattern(cpio->matching, 236 cpio->argument) != ARCHIVE_OK) 237 lafe_errc(1, 0, "Error : %s", 238 archive_error_string(cpio->matching)); 239 break; 240 case OPTION_GRZIP: 241 cpio->compress = opt; 242 break; 243 case 'H': /* GNU cpio (also --format) */ 244 cpio->format = cpio->argument; 245 break; 246 case 'h': 247 long_help(); 248 break; 249 case 'I': /* NetBSD/OpenBSD */ 250 cpio->filename = cpio->argument; 251 break; 252 case 'i': /* POSIX 1997 */ 253 if (cpio->mode != '\0') 254 lafe_errc(1, 0, 255 "Cannot use both -i and -%c", cpio->mode); 256 cpio->mode = opt; 257 break; 258 case 'J': /* GNU tar, others */ 259 cpio->compress = opt; 260 break; 261 case 'j': /* GNU tar, others */ 262 cpio->compress = opt; 263 break; 264 case OPTION_INSECURE: 265 cpio->extract_flags &= ~ARCHIVE_EXTRACT_SECURE_SYMLINKS; 266 cpio->extract_flags &= ~ARCHIVE_EXTRACT_SECURE_NODOTDOT; 267 cpio->extract_flags &= ~ARCHIVE_EXTRACT_SECURE_NOABSOLUTEPATHS; 268 break; 269 case 'L': /* GNU cpio */ 270 cpio->option_follow_links = 1; 271 break; 272 case 'l': /* POSIX 1997 */ 273 cpio->option_link = 1; 274 break; 275 case OPTION_LRZIP: 276 case OPTION_LZ4: 277 case OPTION_LZMA: /* GNU tar, others */ 278 case OPTION_LZOP: /* GNU tar, others */ 279 case OPTION_ZSTD: 280 cpio->compress = opt; 281 break; 282 case 'm': /* POSIX 1997 */ 283 cpio->extract_flags |= ARCHIVE_EXTRACT_TIME; 284 break; 285 case 'n': /* GNU cpio */ 286 cpio->option_numeric_uid_gid = 1; 287 break; 288 case OPTION_NO_PRESERVE_OWNER: /* GNU cpio */ 289 cpio->extract_flags &= ~ARCHIVE_EXTRACT_OWNER; 290 break; 291 case 'O': /* GNU cpio */ 292 cpio->filename = cpio->argument; 293 break; 294 case 'o': /* POSIX 1997 */ 295 if (cpio->mode != '\0') 296 lafe_errc(1, 0, 297 "Cannot use both -o and -%c", cpio->mode); 298 cpio->mode = opt; 299 break; 300 case 'p': /* POSIX 1997 */ 301 if (cpio->mode != '\0') 302 lafe_errc(1, 0, 303 "Cannot use both -p and -%c", cpio->mode); 304 cpio->mode = opt; 305 cpio->extract_flags &= ~ARCHIVE_EXTRACT_SECURE_NODOTDOT; 306 cpio->extract_flags &= ~ARCHIVE_EXTRACT_SECURE_NOABSOLUTEPATHS; 307 break; 308 case OPTION_PASSPHRASE: 309 cpio->passphrase = cpio->argument; 310 break; 311 case OPTION_PRESERVE_OWNER: 312 cpio->extract_flags |= ARCHIVE_EXTRACT_OWNER; 313 break; 314 case OPTION_QUIET: /* GNU cpio */ 315 cpio->quiet = 1; 316 break; 317 case 'R': /* GNU cpio, also --owner */ 318 /* TODO: owner_parse should return uname/gname 319 * also; use that to set [ug]name_override. */ 320 errmsg = owner_parse(cpio->argument, &uid, &gid); 321 if (errmsg) { 322 lafe_warnc(-1, "%s", errmsg); 323 usage(); 324 } 325 if (uid != -1) { 326 cpio->uid_override = uid; 327 cpio->uname_override = NULL; 328 } 329 if (gid != -1) { 330 cpio->gid_override = gid; 331 cpio->gname_override = NULL; 332 } 333 break; 334 case 'r': /* POSIX 1997 */ 335 cpio->option_rename = 1; 336 break; 337 case 't': /* POSIX 1997 */ 338 cpio->option_list = 1; 339 break; 340 case 'u': /* POSIX 1997 */ 341 cpio->extract_flags 342 &= ~ARCHIVE_EXTRACT_NO_OVERWRITE_NEWER; 343 break; 344 case OPTION_UUENCODE: 345 cpio->add_filter = opt; 346 break; 347 case 'v': /* POSIX 1997 */ 348 cpio->verbose++; 349 break; 350 case 'V': /* GNU cpio */ 351 cpio->dot++; 352 break; 353 case OPTION_VERSION: /* GNU convention */ 354 version(); 355 break; 356 #if 0 357 /* 358 * cpio_getopt() handles -W specially, so it's not 359 * available here. 360 */ 361 case 'W': /* Obscure, but useful GNU convention. */ 362 break; 363 #endif 364 case 'y': /* tar convention */ 365 cpio->compress = opt; 366 break; 367 case 'Z': /* tar convention */ 368 cpio->compress = opt; 369 break; 370 case 'z': /* tar convention */ 371 cpio->compress = opt; 372 break; 373 default: 374 usage(); 375 } 376 } 377 378 /* 379 * Sanity-check args, error out on nonsensical combinations. 380 */ 381 /* -t implies -i if no mode was specified. */ 382 if (cpio->option_list && cpio->mode == '\0') 383 cpio->mode = 'i'; 384 /* -t requires -i */ 385 if (cpio->option_list && cpio->mode != 'i') 386 lafe_errc(1, 0, "Option -t requires -i"); 387 /* -n requires -it */ 388 if (cpio->option_numeric_uid_gid && !cpio->option_list) 389 lafe_errc(1, 0, "Option -n requires -it"); 390 /* Can only specify format when writing */ 391 if (cpio->format != NULL && cpio->mode != 'o') 392 lafe_errc(1, 0, "Option --format requires -o"); 393 /* -l requires -p */ 394 if (cpio->option_link && cpio->mode != 'p') 395 lafe_errc(1, 0, "Option -l requires -p"); 396 /* -v overrides -V */ 397 if (cpio->dot && cpio->verbose) 398 cpio->dot = 0; 399 /* TODO: Flag other nonsensical combinations. */ 400 401 switch (cpio->mode) { 402 case 'o': 403 /* TODO: Implement old binary format in libarchive, 404 use that here. */ 405 if (cpio->format == NULL) 406 cpio->format = "odc"; /* Default format */ 407 408 mode_out(cpio); 409 break; 410 case 'i': 411 while (*cpio->argv != NULL) { 412 if (archive_match_include_pattern(cpio->matching, 413 *cpio->argv) != ARCHIVE_OK) 414 lafe_errc(1, 0, "Error : %s", 415 archive_error_string(cpio->matching)); 416 --cpio->argc; 417 ++cpio->argv; 418 } 419 if (cpio->option_list) 420 mode_list(cpio); 421 else 422 mode_in(cpio); 423 break; 424 case 'p': 425 if (*cpio->argv == NULL || **cpio->argv == '\0') 426 lafe_errc(1, 0, 427 "-p mode requires a target directory"); 428 mode_pass(cpio, *cpio->argv); 429 break; 430 default: 431 lafe_errc(1, 0, 432 "Must specify at least one of -i, -o, or -p"); 433 } 434 435 archive_match_free(cpio->matching); 436 free_cache(cpio->gname_cache); 437 free_cache(cpio->uname_cache); 438 free(cpio->destdir); 439 passphrase_free(cpio->ppbuff); 440 return (cpio->return_value); 441 } 442 443 static void 444 usage(void) 445 { 446 const char *p; 447 448 p = lafe_getprogname(); 449 450 fprintf(stderr, "Brief Usage:\n"); 451 fprintf(stderr, " List: %s -it < archive\n", p); 452 fprintf(stderr, " Extract: %s -i < archive\n", p); 453 fprintf(stderr, " Create: %s -o < filenames > archive\n", p); 454 fprintf(stderr, " Help: %s --help\n", p); 455 exit(1); 456 } 457 458 static const char *long_help_msg = 459 "First option must be a mode specifier:\n" 460 " -i Input -o Output -p Pass\n" 461 "Common Options:\n" 462 " -v Verbose filenames -V one dot per file\n" 463 "Create: %p -o [options] < [list of files] > [archive]\n" 464 " -J,-y,-z,--lzma Compress archive with xz/bzip2/gzip/lzma\n" 465 " --format {odc|newc|ustar} Select archive format\n" 466 "List: %p -it < [archive]\n" 467 "Extract: %p -i [options] < [archive]\n"; 468 469 470 /* 471 * Note that the word 'bsdcpio' will always appear in the first line 472 * of output. 473 * 474 * In particular, /bin/sh scripts that need to test for the presence 475 * of bsdcpio can use the following template: 476 * 477 * if (cpio --help 2>&1 | grep bsdcpio >/dev/null 2>&1 ) then \ 478 * echo bsdcpio; else echo not bsdcpio; fi 479 */ 480 static void 481 long_help(void) 482 { 483 const char *prog; 484 const char *p; 485 486 prog = lafe_getprogname(); 487 488 fflush(stderr); 489 490 p = (strcmp(prog,"bsdcpio") != 0) ? "(bsdcpio)" : ""; 491 printf("%s%s: manipulate archive files\n", prog, p); 492 493 for (p = long_help_msg; *p != '\0'; p++) { 494 if (*p == '%') { 495 if (p[1] == 'p') { 496 fputs(prog, stdout); 497 p++; 498 } else 499 putchar('%'); 500 } else 501 putchar(*p); 502 } 503 version(); 504 } 505 506 static void 507 version(void) 508 { 509 fprintf(stdout,"bsdcpio %s - %s \n", 510 BSDCPIO_VERSION_STRING, 511 archive_version_details()); 512 exit(0); 513 } 514 515 static void 516 mode_out(struct cpio *cpio) 517 { 518 struct archive_entry *entry, *spare; 519 struct lafe_line_reader *lr; 520 const char *p; 521 int r; 522 523 if (cpio->option_append) 524 lafe_errc(1, 0, "Append mode not yet supported."); 525 526 cpio->archive_read_disk = archive_read_disk_new(); 527 if (cpio->archive_read_disk == NULL) 528 lafe_errc(1, 0, "Failed to allocate archive object"); 529 if (cpio->option_follow_links) 530 archive_read_disk_set_symlink_logical(cpio->archive_read_disk); 531 else 532 archive_read_disk_set_symlink_physical(cpio->archive_read_disk); 533 archive_read_disk_set_standard_lookup(cpio->archive_read_disk); 534 535 cpio->archive = archive_write_new(); 536 if (cpio->archive == NULL) 537 lafe_errc(1, 0, "Failed to allocate archive object"); 538 switch (cpio->compress) { 539 case OPTION_GRZIP: 540 r = archive_write_add_filter_grzip(cpio->archive); 541 break; 542 case 'J': 543 r = archive_write_add_filter_xz(cpio->archive); 544 break; 545 case OPTION_LRZIP: 546 r = archive_write_add_filter_lrzip(cpio->archive); 547 break; 548 case OPTION_LZ4: 549 r = archive_write_add_filter_lz4(cpio->archive); 550 break; 551 case OPTION_LZMA: 552 r = archive_write_add_filter_lzma(cpio->archive); 553 break; 554 case OPTION_LZOP: 555 r = archive_write_add_filter_lzop(cpio->archive); 556 break; 557 case OPTION_ZSTD: 558 r = archive_write_add_filter_zstd(cpio->archive); 559 break; 560 case 'j': case 'y': 561 r = archive_write_add_filter_bzip2(cpio->archive); 562 break; 563 case 'z': 564 r = archive_write_add_filter_gzip(cpio->archive); 565 break; 566 case 'Z': 567 r = archive_write_add_filter_compress(cpio->archive); 568 break; 569 default: 570 r = archive_write_add_filter_none(cpio->archive); 571 break; 572 } 573 if (r < ARCHIVE_WARN) 574 lafe_errc(1, 0, "Requested compression not available"); 575 switch (cpio->add_filter) { 576 case 0: 577 r = ARCHIVE_OK; 578 break; 579 case OPTION_B64ENCODE: 580 r = archive_write_add_filter_b64encode(cpio->archive); 581 break; 582 case OPTION_UUENCODE: 583 r = archive_write_add_filter_uuencode(cpio->archive); 584 break; 585 } 586 if (r < ARCHIVE_WARN) 587 lafe_errc(1, 0, "Requested filter not available"); 588 r = archive_write_set_format_by_name(cpio->archive, cpio->format); 589 if (r != ARCHIVE_OK) 590 lafe_errc(1, 0, "%s", archive_error_string(cpio->archive)); 591 archive_write_set_bytes_per_block(cpio->archive, cpio->bytes_per_block); 592 cpio->linkresolver = archive_entry_linkresolver_new(); 593 archive_entry_linkresolver_set_strategy(cpio->linkresolver, 594 archive_format(cpio->archive)); 595 if (cpio->passphrase != NULL) 596 r = archive_write_set_passphrase(cpio->archive, 597 cpio->passphrase); 598 else 599 r = archive_write_set_passphrase_callback(cpio->archive, cpio, 600 &passphrase_callback); 601 if (r != ARCHIVE_OK) 602 lafe_errc(1, 0, "%s", archive_error_string(cpio->archive)); 603 604 /* 605 * The main loop: Copy each file into the output archive. 606 */ 607 r = archive_write_open_filename(cpio->archive, cpio->filename); 608 if (r != ARCHIVE_OK) 609 lafe_errc(1, 0, "%s", archive_error_string(cpio->archive)); 610 lr = lafe_line_reader("-", cpio->option_null); 611 while ((p = lafe_line_reader_next(lr)) != NULL) 612 file_to_archive(cpio, p); 613 lafe_line_reader_free(lr); 614 615 /* 616 * The hardlink detection may have queued up a couple of entries 617 * that can now be flushed. 618 */ 619 entry = NULL; 620 archive_entry_linkify(cpio->linkresolver, &entry, &spare); 621 while (entry != NULL) { 622 entry_to_archive(cpio, entry); 623 archive_entry_free(entry); 624 entry = NULL; 625 archive_entry_linkify(cpio->linkresolver, &entry, &spare); 626 } 627 628 r = archive_write_close(cpio->archive); 629 if (cpio->dot) 630 fprintf(stderr, "\n"); 631 if (r != ARCHIVE_OK) 632 lafe_errc(1, 0, "%s", archive_error_string(cpio->archive)); 633 634 if (!cpio->quiet) { 635 int64_t blocks = 636 (archive_filter_bytes(cpio->archive, 0) + 511) 637 / 512; 638 fprintf(stderr, "%lu %s\n", (unsigned long)blocks, 639 blocks == 1 ? "block" : "blocks"); 640 } 641 archive_write_free(cpio->archive); 642 archive_entry_linkresolver_free(cpio->linkresolver); 643 } 644 645 static const char * 646 remove_leading_slash(const char *p) 647 { 648 const char *rp; 649 650 /* Remove leading "//./" or "//?/" or "//?/UNC/" 651 * (absolute path prefixes used by Windows API) */ 652 if ((p[0] == '/' || p[0] == '\\') && 653 (p[1] == '/' || p[1] == '\\') && 654 (p[2] == '.' || p[2] == '?') && 655 (p[3] == '/' || p[3] == '\\')) 656 { 657 if (p[2] == '?' && 658 (p[4] == 'U' || p[4] == 'u') && 659 (p[5] == 'N' || p[5] == 'n') && 660 (p[6] == 'C' || p[6] == 'c') && 661 (p[7] == '/' || p[7] == '\\')) 662 p += 8; 663 else 664 p += 4; 665 } 666 do { 667 rp = p; 668 /* Remove leading drive letter from archives created 669 * on Windows. */ 670 if (((p[0] >= 'a' && p[0] <= 'z') || 671 (p[0] >= 'A' && p[0] <= 'Z')) && 672 p[1] == ':') { 673 p += 2; 674 } 675 /* Remove leading "/../", "//", etc. */ 676 while (p[0] == '/' || p[0] == '\\') { 677 if (p[1] == '.' && p[2] == '.' && 678 (p[3] == '/' || p[3] == '\\')) { 679 p += 3; /* Remove "/..", leave "/" 680 * for next pass. */ 681 } else 682 p += 1; /* Remove "/". */ 683 } 684 } while (rp != p); 685 return (p); 686 } 687 688 /* 689 * This is used by both out mode (to copy objects from disk into 690 * an archive) and pass mode (to copy objects from disk to 691 * an archive_write_disk "archive"). 692 */ 693 static int 694 file_to_archive(struct cpio *cpio, const char *srcpath) 695 { 696 const char *destpath; 697 struct archive_entry *entry, *spare; 698 size_t len; 699 int r; 700 701 /* 702 * Create an archive_entry describing the source file. 703 * 704 */ 705 entry = archive_entry_new(); 706 if (entry == NULL) 707 lafe_errc(1, 0, "Couldn't allocate entry"); 708 archive_entry_copy_sourcepath(entry, srcpath); 709 r = archive_read_disk_entry_from_file(cpio->archive_read_disk, 710 entry, -1, NULL); 711 if (r < ARCHIVE_FAILED) 712 lafe_errc(1, 0, "%s", 713 archive_error_string(cpio->archive_read_disk)); 714 if (r < ARCHIVE_OK) 715 lafe_warnc(0, "%s", 716 archive_error_string(cpio->archive_read_disk)); 717 if (r <= ARCHIVE_FAILED) { 718 archive_entry_free(entry); 719 cpio->return_value = 1; 720 return (r); 721 } 722 723 if (cpio->uid_override >= 0) { 724 archive_entry_set_uid(entry, cpio->uid_override); 725 archive_entry_set_uname(entry, cpio->uname_override); 726 } 727 if (cpio->gid_override >= 0) { 728 archive_entry_set_gid(entry, cpio->gid_override); 729 archive_entry_set_gname(entry, cpio->gname_override); 730 } 731 732 /* 733 * Generate a destination path for this entry. 734 * "destination path" is the name to which it will be copied in 735 * pass mode or the name that will go into the archive in 736 * output mode. 737 */ 738 destpath = srcpath; 739 if (cpio->destdir) { 740 len = strlen(cpio->destdir) + strlen(srcpath) + 8; 741 if (len >= cpio->pass_destpath_alloc) { 742 while (len >= cpio->pass_destpath_alloc) { 743 cpio->pass_destpath_alloc += 512; 744 cpio->pass_destpath_alloc *= 2; 745 } 746 free(cpio->pass_destpath); 747 cpio->pass_destpath = malloc(cpio->pass_destpath_alloc); 748 if (cpio->pass_destpath == NULL) 749 lafe_errc(1, ENOMEM, 750 "Can't allocate path buffer"); 751 } 752 strcpy(cpio->pass_destpath, cpio->destdir); 753 strcat(cpio->pass_destpath, remove_leading_slash(srcpath)); 754 destpath = cpio->pass_destpath; 755 } 756 if (cpio->option_rename) 757 destpath = cpio_rename(destpath); 758 if (destpath == NULL) 759 return (0); 760 archive_entry_copy_pathname(entry, destpath); 761 762 /* 763 * If we're trying to preserve hardlinks, match them here. 764 */ 765 spare = NULL; 766 if (cpio->linkresolver != NULL 767 && archive_entry_filetype(entry) != AE_IFDIR) { 768 archive_entry_linkify(cpio->linkresolver, &entry, &spare); 769 } 770 771 if (entry != NULL) { 772 r = entry_to_archive(cpio, entry); 773 archive_entry_free(entry); 774 if (spare != NULL) { 775 if (r == 0) 776 r = entry_to_archive(cpio, spare); 777 archive_entry_free(spare); 778 } 779 } 780 return (r); 781 } 782 783 static int 784 entry_to_archive(struct cpio *cpio, struct archive_entry *entry) 785 { 786 const char *destpath = archive_entry_pathname(entry); 787 const char *srcpath = archive_entry_sourcepath(entry); 788 int fd = -1; 789 ssize_t bytes_read; 790 int r; 791 792 /* Print out the destination name to the user. */ 793 if (cpio->verbose) 794 fprintf(stderr,"%s", destpath); 795 if (cpio->dot) 796 fprintf(stderr, "."); 797 798 /* 799 * Option_link only makes sense in pass mode and for 800 * regular files. Also note: if a link operation fails 801 * because of cross-device restrictions, we'll fall back 802 * to copy mode for that entry. 803 * 804 * TODO: Test other cpio implementations to see if they 805 * hard-link anything other than regular files here. 806 */ 807 if (cpio->option_link 808 && archive_entry_filetype(entry) == AE_IFREG) 809 { 810 struct archive_entry *t; 811 /* Save the original entry in case we need it later. */ 812 t = archive_entry_clone(entry); 813 if (t == NULL) 814 lafe_errc(1, ENOMEM, "Can't create link"); 815 /* Note: link(2) doesn't create parent directories, 816 * so we use archive_write_header() instead as a 817 * convenience. */ 818 archive_entry_set_hardlink(t, srcpath); 819 /* This is a straight link that carries no data. */ 820 archive_entry_set_size(t, 0); 821 r = archive_write_header(cpio->archive, t); 822 archive_entry_free(t); 823 if (r != ARCHIVE_OK) 824 lafe_warnc(archive_errno(cpio->archive), 825 "%s", archive_error_string(cpio->archive)); 826 if (r == ARCHIVE_FATAL) 827 exit(1); 828 #ifdef EXDEV 829 if (r != ARCHIVE_OK && archive_errno(cpio->archive) == EXDEV) { 830 /* Cross-device link: Just fall through and use 831 * the original entry to copy the file over. */ 832 lafe_warnc(0, "Copying file instead"); 833 } else 834 #endif 835 return (0); 836 } 837 838 /* 839 * Make sure we can open the file (if necessary) before 840 * trying to write the header. 841 */ 842 if (archive_entry_filetype(entry) == AE_IFREG) { 843 if (archive_entry_size(entry) > 0) { 844 fd = open(srcpath, O_RDONLY | O_BINARY); 845 if (fd < 0) { 846 lafe_warnc(errno, 847 "%s: could not open file", srcpath); 848 goto cleanup; 849 } 850 } 851 } else { 852 archive_entry_set_size(entry, 0); 853 } 854 855 r = archive_write_header(cpio->archive, entry); 856 857 if (r != ARCHIVE_OK) 858 lafe_warnc(archive_errno(cpio->archive), 859 "%s: %s", 860 srcpath, 861 archive_error_string(cpio->archive)); 862 863 if (r == ARCHIVE_FATAL) 864 exit(1); 865 866 if (r >= ARCHIVE_WARN && archive_entry_size(entry) > 0 && fd >= 0) { 867 bytes_read = read(fd, cpio->buff, (unsigned)cpio->buff_size); 868 while (bytes_read > 0) { 869 ssize_t bytes_write; 870 bytes_write = archive_write_data(cpio->archive, 871 cpio->buff, bytes_read); 872 if (bytes_write < 0) 873 lafe_errc(1, archive_errno(cpio->archive), 874 "%s", archive_error_string(cpio->archive)); 875 if (bytes_write < bytes_read) { 876 lafe_warnc(0, 877 "Truncated write; file may have " 878 "grown while being archived."); 879 } 880 bytes_read = read(fd, cpio->buff, 881 (unsigned)cpio->buff_size); 882 } 883 } 884 885 fd = restore_time(cpio, entry, srcpath, fd); 886 887 cleanup: 888 if (cpio->verbose) 889 fprintf(stderr,"\n"); 890 if (fd >= 0) 891 close(fd); 892 return (0); 893 } 894 895 static int 896 restore_time(struct cpio *cpio, struct archive_entry *entry, 897 const char *name, int fd) 898 { 899 #ifndef HAVE_UTIMES 900 static int warned = 0; 901 902 (void)cpio; /* UNUSED */ 903 (void)entry; /* UNUSED */ 904 (void)name; /* UNUSED */ 905 906 if (!warned) 907 lafe_warnc(0, "Can't restore access times on this platform"); 908 warned = 1; 909 return (fd); 910 #else 911 #if defined(_WIN32) && !defined(__CYGWIN__) 912 struct __timeval times[2]; 913 #else 914 struct timeval times[2]; 915 #endif 916 917 if (!cpio->option_atime_restore) 918 return (fd); 919 920 times[1].tv_sec = archive_entry_mtime(entry); 921 times[1].tv_usec = archive_entry_mtime_nsec(entry) / 1000; 922 923 times[0].tv_sec = archive_entry_atime(entry); 924 times[0].tv_usec = archive_entry_atime_nsec(entry) / 1000; 925 926 #if defined(HAVE_FUTIMES) && !defined(__CYGWIN__) 927 if (fd >= 0 && futimes(fd, times) == 0) 928 return (fd); 929 #endif 930 /* 931 * Some platform cannot restore access times if the file descriptor 932 * is still opened. 933 */ 934 if (fd >= 0) { 935 close(fd); 936 fd = -1; 937 } 938 939 #ifdef HAVE_LUTIMES 940 if (lutimes(name, times) != 0) 941 #else 942 if ((AE_IFLNK != archive_entry_filetype(entry)) 943 && utimes(name, times) != 0) 944 #endif 945 lafe_warnc(errno, "Can't update time for %s", name); 946 #endif 947 return (fd); 948 } 949 950 951 static void 952 mode_in(struct cpio *cpio) 953 { 954 struct archive *a; 955 struct archive_entry *entry; 956 struct archive *ext; 957 const char *destpath; 958 int r; 959 960 ext = archive_write_disk_new(); 961 if (ext == NULL) 962 lafe_errc(1, 0, "Couldn't allocate restore object"); 963 r = archive_write_disk_set_options(ext, cpio->extract_flags); 964 if (r != ARCHIVE_OK) 965 lafe_errc(1, 0, "%s", archive_error_string(ext)); 966 a = archive_read_new(); 967 if (a == NULL) 968 lafe_errc(1, 0, "Couldn't allocate archive object"); 969 archive_read_support_filter_all(a); 970 archive_read_support_format_all(a); 971 if (cpio->passphrase != NULL) 972 r = archive_read_add_passphrase(a, cpio->passphrase); 973 else 974 r = archive_read_set_passphrase_callback(a, cpio, 975 &passphrase_callback); 976 if (r != ARCHIVE_OK) 977 lafe_errc(1, 0, "%s", archive_error_string(a)); 978 979 if (archive_read_open_filename(a, cpio->filename, 980 cpio->bytes_per_block)) 981 lafe_errc(1, archive_errno(a), 982 "%s", archive_error_string(a)); 983 for (;;) { 984 r = archive_read_next_header(a, &entry); 985 if (r == ARCHIVE_EOF) 986 break; 987 if (r != ARCHIVE_OK) { 988 lafe_errc(1, archive_errno(a), 989 "%s", archive_error_string(a)); 990 } 991 if (archive_match_path_excluded(cpio->matching, entry)) 992 continue; 993 if (cpio->option_rename) { 994 destpath = cpio_rename(archive_entry_pathname(entry)); 995 archive_entry_set_pathname(entry, destpath); 996 } else 997 destpath = archive_entry_pathname(entry); 998 if (destpath == NULL) 999 continue; 1000 if (cpio->verbose) 1001 fprintf(stderr, "%s\n", destpath); 1002 if (cpio->dot) 1003 fprintf(stderr, "."); 1004 if (cpio->uid_override >= 0) 1005 archive_entry_set_uid(entry, cpio->uid_override); 1006 if (cpio->gid_override >= 0) 1007 archive_entry_set_gid(entry, cpio->gid_override); 1008 r = archive_write_header(ext, entry); 1009 if (r != ARCHIVE_OK) { 1010 fprintf(stderr, "%s: %s\n", 1011 archive_entry_pathname(entry), 1012 archive_error_string(ext)); 1013 } else if (!archive_entry_size_is_set(entry) 1014 || archive_entry_size(entry) > 0) { 1015 r = extract_data(a, ext); 1016 if (r != ARCHIVE_OK) 1017 cpio->return_value = 1; 1018 } 1019 } 1020 r = archive_read_close(a); 1021 if (cpio->dot) 1022 fprintf(stderr, "\n"); 1023 if (r != ARCHIVE_OK) 1024 lafe_errc(1, 0, "%s", archive_error_string(a)); 1025 r = archive_write_close(ext); 1026 if (r != ARCHIVE_OK) 1027 lafe_errc(1, 0, "%s", archive_error_string(ext)); 1028 if (!cpio->quiet) { 1029 int64_t blocks = (archive_filter_bytes(a, 0) + 511) 1030 / 512; 1031 fprintf(stderr, "%lu %s\n", (unsigned long)blocks, 1032 blocks == 1 ? "block" : "blocks"); 1033 } 1034 archive_read_free(a); 1035 archive_write_free(ext); 1036 exit(cpio->return_value); 1037 } 1038 1039 /* 1040 * Exits if there's a fatal error. Returns ARCHIVE_OK 1041 * if everything is kosher. 1042 */ 1043 static int 1044 extract_data(struct archive *ar, struct archive *aw) 1045 { 1046 int r; 1047 size_t size; 1048 const void *block; 1049 int64_t offset; 1050 1051 for (;;) { 1052 r = archive_read_data_block(ar, &block, &size, &offset); 1053 if (r == ARCHIVE_EOF) 1054 return (ARCHIVE_OK); 1055 if (r != ARCHIVE_OK) { 1056 lafe_warnc(archive_errno(ar), 1057 "%s", archive_error_string(ar)); 1058 exit(1); 1059 } 1060 r = (int)archive_write_data_block(aw, block, size, offset); 1061 if (r != ARCHIVE_OK) { 1062 lafe_warnc(archive_errno(aw), 1063 "%s", archive_error_string(aw)); 1064 return (r); 1065 } 1066 } 1067 } 1068 1069 static void 1070 mode_list(struct cpio *cpio) 1071 { 1072 struct archive *a; 1073 struct archive_entry *entry; 1074 int r; 1075 1076 a = archive_read_new(); 1077 if (a == NULL) 1078 lafe_errc(1, 0, "Couldn't allocate archive object"); 1079 archive_read_support_filter_all(a); 1080 archive_read_support_format_all(a); 1081 if (cpio->passphrase != NULL) 1082 r = archive_read_add_passphrase(a, cpio->passphrase); 1083 else 1084 r = archive_read_set_passphrase_callback(a, cpio, 1085 &passphrase_callback); 1086 if (r != ARCHIVE_OK) 1087 lafe_errc(1, 0, "%s", archive_error_string(a)); 1088 1089 if (archive_read_open_filename(a, cpio->filename, 1090 cpio->bytes_per_block)) 1091 lafe_errc(1, archive_errno(a), 1092 "%s", archive_error_string(a)); 1093 for (;;) { 1094 r = archive_read_next_header(a, &entry); 1095 if (r == ARCHIVE_EOF) 1096 break; 1097 if (r != ARCHIVE_OK) { 1098 lafe_errc(1, archive_errno(a), 1099 "%s", archive_error_string(a)); 1100 } 1101 if (archive_match_path_excluded(cpio->matching, entry)) 1102 continue; 1103 if (cpio->verbose) 1104 list_item_verbose(cpio, entry); 1105 else 1106 fprintf(stdout, "%s\n", archive_entry_pathname(entry)); 1107 } 1108 r = archive_read_close(a); 1109 if (r != ARCHIVE_OK) 1110 lafe_errc(1, 0, "%s", archive_error_string(a)); 1111 if (!cpio->quiet) { 1112 int64_t blocks = (archive_filter_bytes(a, 0) + 511) 1113 / 512; 1114 fprintf(stderr, "%lu %s\n", (unsigned long)blocks, 1115 blocks == 1 ? "block" : "blocks"); 1116 } 1117 archive_read_free(a); 1118 exit(0); 1119 } 1120 1121 /* 1122 * Display information about the current file. 1123 * 1124 * The format here roughly duplicates the output of 'ls -l'. 1125 * This is based on SUSv2, where 'tar tv' is documented as 1126 * listing additional information in an "unspecified format," 1127 * and 'pax -l' is documented as using the same format as 'ls -l'. 1128 */ 1129 static void 1130 list_item_verbose(struct cpio *cpio, struct archive_entry *entry) 1131 { 1132 char size[32]; 1133 char date[32]; 1134 char uids[16], gids[16]; 1135 const char *uname, *gname; 1136 FILE *out = stdout; 1137 const char *fmt; 1138 time_t mtime; 1139 static time_t now; 1140 1141 if (!now) 1142 time(&now); 1143 1144 if (cpio->option_numeric_uid_gid) { 1145 /* Format numeric uid/gid for display. */ 1146 strcpy(uids, cpio_i64toa(archive_entry_uid(entry))); 1147 uname = uids; 1148 strcpy(gids, cpio_i64toa(archive_entry_gid(entry))); 1149 gname = gids; 1150 } else { 1151 /* Use uname if it's present, else lookup name from uid. */ 1152 uname = archive_entry_uname(entry); 1153 if (uname == NULL) 1154 uname = lookup_uname(cpio, (uid_t)archive_entry_uid(entry)); 1155 /* Use gname if it's present, else lookup name from gid. */ 1156 gname = archive_entry_gname(entry); 1157 if (gname == NULL) 1158 gname = lookup_gname(cpio, (uid_t)archive_entry_gid(entry)); 1159 } 1160 1161 /* Print device number or file size. */ 1162 if (archive_entry_filetype(entry) == AE_IFCHR 1163 || archive_entry_filetype(entry) == AE_IFBLK) { 1164 snprintf(size, sizeof(size), "%lu,%lu", 1165 (unsigned long)archive_entry_rdevmajor(entry), 1166 (unsigned long)archive_entry_rdevminor(entry)); 1167 } else { 1168 strcpy(size, cpio_i64toa(archive_entry_size(entry))); 1169 } 1170 1171 /* Format the time using 'ls -l' conventions. */ 1172 mtime = archive_entry_mtime(entry); 1173 #if defined(_WIN32) && !defined(__CYGWIN__) 1174 /* Windows' strftime function does not support %e format. */ 1175 if (mtime - now > 365*86400/2 1176 || mtime - now < -365*86400/2) 1177 fmt = cpio->day_first ? "%d %b %Y" : "%b %d %Y"; 1178 else 1179 fmt = cpio->day_first ? "%d %b %H:%M" : "%b %d %H:%M"; 1180 #else 1181 if (mtime - now > 365*86400/2 1182 || mtime - now < -365*86400/2) 1183 fmt = cpio->day_first ? "%e %b %Y" : "%b %e %Y"; 1184 else 1185 fmt = cpio->day_first ? "%e %b %H:%M" : "%b %e %H:%M"; 1186 #endif 1187 strftime(date, sizeof(date), fmt, localtime(&mtime)); 1188 1189 fprintf(out, "%s%3d %-8s %-8s %8s %12s %s", 1190 archive_entry_strmode(entry), 1191 archive_entry_nlink(entry), 1192 uname, gname, size, date, 1193 archive_entry_pathname(entry)); 1194 1195 /* Extra information for links. */ 1196 if (archive_entry_hardlink(entry)) /* Hard link */ 1197 fprintf(out, " link to %s", archive_entry_hardlink(entry)); 1198 else if (archive_entry_symlink(entry)) /* Symbolic link */ 1199 fprintf(out, " -> %s", archive_entry_symlink(entry)); 1200 fprintf(out, "\n"); 1201 } 1202 1203 static void 1204 mode_pass(struct cpio *cpio, const char *destdir) 1205 { 1206 struct lafe_line_reader *lr; 1207 const char *p; 1208 int r; 1209 size_t destdir_len; 1210 1211 /* Ensure target dir has a trailing '/' to simplify path surgery. */ 1212 destdir_len = strlen(destdir); 1213 cpio->destdir = malloc(destdir_len + 8); 1214 memcpy(cpio->destdir, destdir, destdir_len); 1215 if (destdir_len == 0 || destdir[destdir_len - 1] != '/') 1216 cpio->destdir[destdir_len++] = '/'; 1217 cpio->destdir[destdir_len++] = '\0'; 1218 1219 cpio->archive = archive_write_disk_new(); 1220 if (cpio->archive == NULL) 1221 lafe_errc(1, 0, "Failed to allocate archive object"); 1222 r = archive_write_disk_set_options(cpio->archive, cpio->extract_flags); 1223 if (r != ARCHIVE_OK) 1224 lafe_errc(1, 0, "%s", archive_error_string(cpio->archive)); 1225 cpio->linkresolver = archive_entry_linkresolver_new(); 1226 archive_write_disk_set_standard_lookup(cpio->archive); 1227 1228 cpio->archive_read_disk = archive_read_disk_new(); 1229 if (cpio->archive_read_disk == NULL) 1230 lafe_errc(1, 0, "Failed to allocate archive object"); 1231 if (cpio->option_follow_links) 1232 archive_read_disk_set_symlink_logical(cpio->archive_read_disk); 1233 else 1234 archive_read_disk_set_symlink_physical(cpio->archive_read_disk); 1235 archive_read_disk_set_standard_lookup(cpio->archive_read_disk); 1236 1237 lr = lafe_line_reader("-", cpio->option_null); 1238 while ((p = lafe_line_reader_next(lr)) != NULL) 1239 file_to_archive(cpio, p); 1240 lafe_line_reader_free(lr); 1241 1242 archive_entry_linkresolver_free(cpio->linkresolver); 1243 r = archive_write_close(cpio->archive); 1244 if (cpio->dot) 1245 fprintf(stderr, "\n"); 1246 if (r != ARCHIVE_OK) 1247 lafe_errc(1, 0, "%s", archive_error_string(cpio->archive)); 1248 1249 if (!cpio->quiet) { 1250 int64_t blocks = 1251 (archive_filter_bytes(cpio->archive, 0) + 511) 1252 / 512; 1253 fprintf(stderr, "%lu %s\n", (unsigned long)blocks, 1254 blocks == 1 ? "block" : "blocks"); 1255 } 1256 1257 archive_write_free(cpio->archive); 1258 free(cpio->pass_destpath); 1259 } 1260 1261 /* 1262 * Prompt for a new name for this entry. Returns a pointer to the 1263 * new name or NULL if the entry should not be copied. This 1264 * implements the semantics defined in POSIX.1-1996, which specifies 1265 * that an input of '.' means the name should be unchanged. GNU cpio 1266 * treats '.' as a literal new name. 1267 */ 1268 static const char * 1269 cpio_rename(const char *name) 1270 { 1271 static char buff[1024]; 1272 FILE *t; 1273 char *p, *ret; 1274 #if defined(_WIN32) && !defined(__CYGWIN__) 1275 FILE *to; 1276 1277 t = fopen("CONIN$", "r"); 1278 if (t == NULL) 1279 return (name); 1280 to = fopen("CONOUT$", "w"); 1281 if (to == NULL) { 1282 fclose(t); 1283 return (name); 1284 } 1285 fprintf(to, "%s (Enter/./(new name))? ", name); 1286 fclose(to); 1287 #else 1288 t = fopen("/dev/tty", "r+"); 1289 if (t == NULL) 1290 return (name); 1291 fprintf(t, "%s (Enter/./(new name))? ", name); 1292 fflush(t); 1293 #endif 1294 1295 p = fgets(buff, sizeof(buff), t); 1296 fclose(t); 1297 if (p == NULL) 1298 /* End-of-file is a blank line. */ 1299 return (NULL); 1300 1301 while (*p == ' ' || *p == '\t') 1302 ++p; 1303 if (*p == '\n' || *p == '\0') 1304 /* Empty line. */ 1305 return (NULL); 1306 if (*p == '.' && p[1] == '\n') 1307 /* Single period preserves original name. */ 1308 return (name); 1309 ret = p; 1310 /* Trim the final newline. */ 1311 while (*p != '\0' && *p != '\n') 1312 ++p; 1313 /* Overwrite the final \n with a null character. */ 1314 *p = '\0'; 1315 return (ret); 1316 } 1317 1318 static void 1319 free_cache(struct name_cache *cache) 1320 { 1321 size_t i; 1322 1323 if (cache != NULL) { 1324 for (i = 0; i < cache->size; i++) 1325 free(cache->cache[i].name); 1326 free(cache); 1327 } 1328 } 1329 1330 /* 1331 * Lookup uname/gname from uid/gid, return NULL if no match. 1332 */ 1333 static const char * 1334 lookup_name(struct cpio *cpio, struct name_cache **name_cache_variable, 1335 int (*lookup_fn)(struct cpio *, const char **, id_t), id_t id) 1336 { 1337 char asnum[16]; 1338 struct name_cache *cache; 1339 const char *name; 1340 int slot; 1341 1342 1343 if (*name_cache_variable == NULL) { 1344 *name_cache_variable = calloc(1, sizeof(struct name_cache)); 1345 if (*name_cache_variable == NULL) 1346 lafe_errc(1, ENOMEM, "No more memory"); 1347 (*name_cache_variable)->size = name_cache_size; 1348 } 1349 1350 cache = *name_cache_variable; 1351 cache->probes++; 1352 1353 slot = id % cache->size; 1354 if (cache->cache[slot].name != NULL) { 1355 if (cache->cache[slot].id == id) { 1356 cache->hits++; 1357 return (cache->cache[slot].name); 1358 } 1359 free(cache->cache[slot].name); 1360 cache->cache[slot].name = NULL; 1361 } 1362 1363 if (lookup_fn(cpio, &name, id)) { 1364 /* If lookup failed, format it as a number. */ 1365 snprintf(asnum, sizeof(asnum), "%u", (unsigned)id); 1366 name = asnum; 1367 } 1368 1369 cache->cache[slot].name = strdup(name); 1370 if (cache->cache[slot].name != NULL) { 1371 cache->cache[slot].id = id; 1372 return (cache->cache[slot].name); 1373 } 1374 1375 /* 1376 * Conveniently, NULL marks an empty slot, so 1377 * if the strdup() fails, we've just failed to 1378 * cache it. No recovery necessary. 1379 */ 1380 return (NULL); 1381 } 1382 1383 static const char * 1384 lookup_uname(struct cpio *cpio, uid_t uid) 1385 { 1386 return (lookup_name(cpio, &cpio->uname_cache, 1387 &lookup_uname_helper, (id_t)uid)); 1388 } 1389 1390 static int 1391 lookup_uname_helper(struct cpio *cpio, const char **name, id_t id) 1392 { 1393 struct passwd *pwent; 1394 1395 (void)cpio; /* UNUSED */ 1396 1397 errno = 0; 1398 pwent = getpwuid((uid_t)id); 1399 if (pwent == NULL) { 1400 if (errno && errno != ENOENT) 1401 lafe_warnc(errno, "getpwuid(%s) failed", 1402 cpio_i64toa((int64_t)id)); 1403 return 1; 1404 } 1405 1406 *name = pwent->pw_name; 1407 return 0; 1408 } 1409 1410 static const char * 1411 lookup_gname(struct cpio *cpio, gid_t gid) 1412 { 1413 return (lookup_name(cpio, &cpio->gname_cache, 1414 &lookup_gname_helper, (id_t)gid)); 1415 } 1416 1417 static int 1418 lookup_gname_helper(struct cpio *cpio, const char **name, id_t id) 1419 { 1420 struct group *grent; 1421 1422 (void)cpio; /* UNUSED */ 1423 1424 errno = 0; 1425 grent = getgrgid((gid_t)id); 1426 if (grent == NULL) { 1427 if (errno && errno != ENOENT) 1428 lafe_warnc(errno, "getgrgid(%s) failed", 1429 cpio_i64toa((int64_t)id)); 1430 return 1; 1431 } 1432 1433 *name = grent->gr_name; 1434 return 0; 1435 } 1436 1437 /* 1438 * It would be nice to just use printf() for formatting large numbers, 1439 * but the compatibility problems are a big headache. Hence the 1440 * following simple utility function. 1441 */ 1442 const char * 1443 cpio_i64toa(int64_t n0) 1444 { 1445 /* 2^64 =~ 1.8 * 10^19, so 20 decimal digits suffice. 1446 * We also need 1 byte for '-' and 1 for '\0'. 1447 */ 1448 static char buff[22]; 1449 int64_t n = n0 < 0 ? -n0 : n0; 1450 char *p = buff + sizeof(buff); 1451 1452 *--p = '\0'; 1453 do { 1454 *--p = '0' + (int)(n % 10); 1455 n /= 10; 1456 } while (n > 0); 1457 if (n0 < 0) 1458 *--p = '-'; 1459 return p; 1460 } 1461 1462 #define PPBUFF_SIZE 1024 1463 static const char * 1464 passphrase_callback(struct archive *a, void *_client_data) 1465 { 1466 struct cpio *cpio = (struct cpio *)_client_data; 1467 (void)a; /* UNUSED */ 1468 1469 if (cpio->ppbuff == NULL) { 1470 cpio->ppbuff = malloc(PPBUFF_SIZE); 1471 if (cpio->ppbuff == NULL) 1472 lafe_errc(1, errno, "Out of memory"); 1473 } 1474 return lafe_readpassphrase("Enter passphrase:", 1475 cpio->ppbuff, PPBUFF_SIZE); 1476 } 1477 1478 static void 1479 passphrase_free(char *ppbuff) 1480 { 1481 if (ppbuff != NULL) { 1482 memset(ppbuff, 0, PPBUFF_SIZE); 1483 free(ppbuff); 1484 } 1485 } 1486