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