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 '6': /* in/out: assume/create 6th edition (PWB) format */ 196 cpio->option_pwb = 1; 197 break; 198 case '7': /* out: create archive using 7th Edition binary format */ 199 cpio->format = "bin"; 200 break; 201 case 'A': /* NetBSD/OpenBSD */ 202 cpio->option_append = 1; 203 break; 204 case 'a': /* POSIX 1997 */ 205 cpio->option_atime_restore = 1; 206 break; 207 case 'B': /* POSIX 1997 */ 208 cpio->bytes_per_block = 5120; 209 break; 210 case OPTION_B64ENCODE: 211 cpio->add_filter = opt; 212 break; 213 case 'C': /* NetBSD/OpenBSD */ 214 errno = 0; 215 tptr = NULL; 216 t = (int)strtol(cpio->argument, &tptr, 10); 217 if (errno || t <= 0 || *(cpio->argument) == '\0' || 218 tptr == NULL || *tptr != '\0') { 219 lafe_errc(1, 0, "Invalid blocksize: %s", 220 cpio->argument); 221 } 222 cpio->bytes_per_block = t; 223 break; 224 case 'c': /* POSIX 1997 */ 225 cpio->format = "odc"; 226 break; 227 case 'd': /* POSIX 1997 */ 228 cpio->extract_flags &= ~ARCHIVE_EXTRACT_NO_AUTODIR; 229 break; 230 case 'E': /* NetBSD/OpenBSD */ 231 if (archive_match_include_pattern_from_file( 232 cpio->matching, cpio->argument, 233 cpio->option_null) != ARCHIVE_OK) 234 lafe_errc(1, 0, "Error : %s", 235 archive_error_string(cpio->matching)); 236 break; 237 case 'F': /* NetBSD/OpenBSD/GNU cpio */ 238 cpio->filename = cpio->argument; 239 break; 240 case 'f': /* POSIX 1997 */ 241 if (archive_match_exclude_pattern(cpio->matching, 242 cpio->argument) != ARCHIVE_OK) 243 lafe_errc(1, 0, "Error : %s", 244 archive_error_string(cpio->matching)); 245 break; 246 case OPTION_GRZIP: 247 cpio->compress = opt; 248 break; 249 case 'H': /* GNU cpio (also --format) */ 250 cpio->format = cpio->argument; 251 break; 252 case 'h': 253 long_help(); 254 break; 255 case 'I': /* NetBSD/OpenBSD */ 256 cpio->filename = cpio->argument; 257 break; 258 case 'i': /* POSIX 1997 */ 259 if (cpio->mode != '\0') 260 lafe_errc(1, 0, 261 "Cannot use both -i and -%c", cpio->mode); 262 cpio->mode = opt; 263 break; 264 case 'J': /* GNU tar, others */ 265 cpio->compress = opt; 266 break; 267 case 'j': /* GNU tar, others */ 268 cpio->compress = opt; 269 break; 270 case OPTION_INSECURE: 271 cpio->extract_flags &= ~ARCHIVE_EXTRACT_SECURE_SYMLINKS; 272 cpio->extract_flags &= ~ARCHIVE_EXTRACT_SECURE_NODOTDOT; 273 cpio->extract_flags &= ~ARCHIVE_EXTRACT_SECURE_NOABSOLUTEPATHS; 274 break; 275 case 'L': /* GNU cpio */ 276 cpio->option_follow_links = 1; 277 break; 278 case 'l': /* POSIX 1997 */ 279 cpio->option_link = 1; 280 break; 281 case OPTION_LRZIP: 282 case OPTION_LZ4: 283 case OPTION_LZMA: /* GNU tar, others */ 284 case OPTION_LZOP: /* GNU tar, others */ 285 case OPTION_ZSTD: 286 cpio->compress = opt; 287 break; 288 case 'm': /* POSIX 1997 */ 289 cpio->extract_flags |= ARCHIVE_EXTRACT_TIME; 290 break; 291 case 'n': /* GNU cpio */ 292 cpio->option_numeric_uid_gid = 1; 293 break; 294 case OPTION_NO_PRESERVE_OWNER: /* GNU cpio */ 295 cpio->extract_flags &= ~ARCHIVE_EXTRACT_OWNER; 296 break; 297 case 'O': /* GNU cpio */ 298 cpio->filename = cpio->argument; 299 break; 300 case 'o': /* POSIX 1997 */ 301 if (cpio->mode != '\0') 302 lafe_errc(1, 0, 303 "Cannot use both -o and -%c", cpio->mode); 304 cpio->mode = opt; 305 break; 306 case 'p': /* POSIX 1997 */ 307 if (cpio->mode != '\0') 308 lafe_errc(1, 0, 309 "Cannot use both -p and -%c", cpio->mode); 310 cpio->mode = opt; 311 cpio->extract_flags &= ~ARCHIVE_EXTRACT_SECURE_NODOTDOT; 312 cpio->extract_flags &= ~ARCHIVE_EXTRACT_SECURE_NOABSOLUTEPATHS; 313 break; 314 case OPTION_PASSPHRASE: 315 cpio->passphrase = cpio->argument; 316 break; 317 case OPTION_PRESERVE_OWNER: 318 cpio->extract_flags |= ARCHIVE_EXTRACT_OWNER; 319 break; 320 case OPTION_QUIET: /* GNU cpio */ 321 cpio->quiet = 1; 322 break; 323 case 'R': /* GNU cpio, also --owner */ 324 /* TODO: owner_parse should return uname/gname 325 * also; use that to set [ug]name_override. */ 326 errmsg = owner_parse(cpio->argument, &uid, &gid); 327 if (errmsg) { 328 lafe_warnc(-1, "%s", errmsg); 329 usage(); 330 } 331 if (uid != -1) { 332 cpio->uid_override = uid; 333 cpio->uname_override = NULL; 334 } 335 if (gid != -1) { 336 cpio->gid_override = gid; 337 cpio->gname_override = NULL; 338 } 339 break; 340 case 'r': /* POSIX 1997 */ 341 cpio->option_rename = 1; 342 break; 343 case 't': /* POSIX 1997 */ 344 cpio->option_list = 1; 345 break; 346 case 'u': /* POSIX 1997 */ 347 cpio->extract_flags 348 &= ~ARCHIVE_EXTRACT_NO_OVERWRITE_NEWER; 349 break; 350 case OPTION_UUENCODE: 351 cpio->add_filter = opt; 352 break; 353 case 'v': /* POSIX 1997 */ 354 cpio->verbose++; 355 break; 356 case 'V': /* GNU cpio */ 357 cpio->dot++; 358 break; 359 case OPTION_VERSION: /* GNU convention */ 360 version(); 361 break; 362 #if 0 363 /* 364 * cpio_getopt() handles -W specially, so it's not 365 * available here. 366 */ 367 case 'W': /* Obscure, but useful GNU convention. */ 368 break; 369 #endif 370 case 'y': /* tar convention */ 371 cpio->compress = opt; 372 break; 373 case 'Z': /* tar convention */ 374 cpio->compress = opt; 375 break; 376 case 'z': /* tar convention */ 377 cpio->compress = opt; 378 break; 379 default: 380 usage(); 381 } 382 } 383 384 /* 385 * Sanity-check args, error out on nonsensical combinations. 386 */ 387 /* -t implies -i if no mode was specified. */ 388 if (cpio->option_list && cpio->mode == '\0') 389 cpio->mode = 'i'; 390 /* -t requires -i */ 391 if (cpio->option_list && cpio->mode != 'i') 392 lafe_errc(1, 0, "Option -t requires -i"); 393 /* -n requires -it */ 394 if (cpio->option_numeric_uid_gid && !cpio->option_list) 395 lafe_errc(1, 0, "Option -n requires -it"); 396 /* Can only specify format when writing */ 397 if (cpio->format != NULL && cpio->mode != 'o') 398 lafe_errc(1, 0, "Option --format requires -o"); 399 /* -l requires -p */ 400 if (cpio->option_link && cpio->mode != 'p') 401 lafe_errc(1, 0, "Option -l requires -p"); 402 /* -v overrides -V */ 403 if (cpio->dot && cpio->verbose) 404 cpio->dot = 0; 405 /* TODO: Flag other nonsensical combinations. */ 406 407 switch (cpio->mode) { 408 case 'o': 409 if (cpio->format == NULL) { 410 if (cpio->option_pwb) 411 cpio->format = "pwb"; 412 else 413 cpio->format = "cpio"; 414 } 415 mode_out(cpio); 416 break; 417 case 'i': 418 while (*cpio->argv != NULL) { 419 if (archive_match_include_pattern(cpio->matching, 420 *cpio->argv) != ARCHIVE_OK) 421 lafe_errc(1, 0, "Error : %s", 422 archive_error_string(cpio->matching)); 423 --cpio->argc; 424 ++cpio->argv; 425 } 426 if (cpio->option_list) 427 mode_list(cpio); 428 else 429 mode_in(cpio); 430 break; 431 case 'p': 432 if (*cpio->argv == NULL || **cpio->argv == '\0') 433 lafe_errc(1, 0, 434 "-p mode requires a target directory"); 435 mode_pass(cpio, *cpio->argv); 436 break; 437 default: 438 lafe_errc(1, 0, 439 "Must specify at least one of -i, -o, or -p"); 440 } 441 442 archive_match_free(cpio->matching); 443 free_cache(cpio->gname_cache); 444 free_cache(cpio->uname_cache); 445 archive_read_close(cpio->archive_read_disk); 446 archive_read_free(cpio->archive_read_disk); 447 free(cpio->destdir); 448 passphrase_free(cpio->ppbuff); 449 return (cpio->return_value); 450 } 451 452 static void 453 usage(void) 454 { 455 const char *p; 456 457 p = lafe_getprogname(); 458 459 fprintf(stderr, "Brief Usage:\n"); 460 fprintf(stderr, " List: %s -it < archive\n", p); 461 fprintf(stderr, " Extract: %s -i < archive\n", p); 462 fprintf(stderr, " Create: %s -o < filenames > archive\n", p); 463 fprintf(stderr, " Help: %s --help\n", p); 464 exit(1); 465 } 466 467 static const char *long_help_msg = 468 "First option must be a mode specifier:\n" 469 " -i Input -o Output -p Pass\n" 470 "Common Options:\n" 471 " -v Verbose filenames -V one dot per file\n" 472 "Create: %p -o [options] < [list of files] > [archive]\n" 473 " -J,-y,-z,--lzma Compress archive with xz/bzip2/gzip/lzma\n" 474 " --format {pwb|bin|odc|newc|ustar} Select archive format\n" 475 "List: %p -it < [archive]\n" 476 "Extract: %p -i [options] < [archive]\n"; 477 478 479 /* 480 * Note that the word 'bsdcpio' will always appear in the first line 481 * of output. 482 * 483 * In particular, /bin/sh scripts that need to test for the presence 484 * of bsdcpio can use the following template: 485 * 486 * if (cpio --help 2>&1 | grep bsdcpio >/dev/null 2>&1 ) then \ 487 * echo bsdcpio; else echo not bsdcpio; fi 488 */ 489 static void 490 long_help(void) 491 { 492 const char *prog; 493 const char *p; 494 495 prog = lafe_getprogname(); 496 497 fflush(stderr); 498 499 p = (strcmp(prog,"bsdcpio") != 0) ? "(bsdcpio)" : ""; 500 printf("%s%s: manipulate archive files\n", prog, p); 501 502 for (p = long_help_msg; *p != '\0'; p++) { 503 if (*p == '%') { 504 if (p[1] == 'p') { 505 fputs(prog, stdout); 506 p++; 507 } else 508 putchar('%'); 509 } else 510 putchar(*p); 511 } 512 version(); 513 } 514 515 static void 516 version(void) 517 { 518 fprintf(stdout,"bsdcpio %s - %s \n", 519 BSDCPIO_VERSION_STRING, 520 archive_version_details()); 521 exit(0); 522 } 523 524 static void 525 mode_out(struct cpio *cpio) 526 { 527 struct archive_entry *entry, *spare; 528 struct lafe_line_reader *lr; 529 const char *p; 530 int r; 531 532 if (cpio->option_append) 533 lafe_errc(1, 0, "Append mode not yet supported."); 534 535 cpio->archive_read_disk = archive_read_disk_new(); 536 if (cpio->archive_read_disk == NULL) 537 lafe_errc(1, 0, "Failed to allocate archive object"); 538 if (cpio->option_follow_links) 539 archive_read_disk_set_symlink_logical(cpio->archive_read_disk); 540 else 541 archive_read_disk_set_symlink_physical(cpio->archive_read_disk); 542 archive_read_disk_set_standard_lookup(cpio->archive_read_disk); 543 544 cpio->archive = archive_write_new(); 545 if (cpio->archive == NULL) 546 lafe_errc(1, 0, "Failed to allocate archive object"); 547 switch (cpio->compress) { 548 case OPTION_GRZIP: 549 r = archive_write_add_filter_grzip(cpio->archive); 550 break; 551 case 'J': 552 r = archive_write_add_filter_xz(cpio->archive); 553 break; 554 case OPTION_LRZIP: 555 r = archive_write_add_filter_lrzip(cpio->archive); 556 break; 557 case OPTION_LZ4: 558 r = archive_write_add_filter_lz4(cpio->archive); 559 break; 560 case OPTION_LZMA: 561 r = archive_write_add_filter_lzma(cpio->archive); 562 break; 563 case OPTION_LZOP: 564 r = archive_write_add_filter_lzop(cpio->archive); 565 break; 566 case OPTION_ZSTD: 567 r = archive_write_add_filter_zstd(cpio->archive); 568 break; 569 case 'j': case 'y': 570 r = archive_write_add_filter_bzip2(cpio->archive); 571 break; 572 case 'z': 573 r = archive_write_add_filter_gzip(cpio->archive); 574 break; 575 case 'Z': 576 r = archive_write_add_filter_compress(cpio->archive); 577 break; 578 default: 579 r = archive_write_add_filter_none(cpio->archive); 580 break; 581 } 582 if (r < ARCHIVE_WARN) 583 lafe_errc(1, 0, "Requested compression not available"); 584 switch (cpio->add_filter) { 585 case 0: 586 r = ARCHIVE_OK; 587 break; 588 case OPTION_B64ENCODE: 589 r = archive_write_add_filter_b64encode(cpio->archive); 590 break; 591 case OPTION_UUENCODE: 592 r = archive_write_add_filter_uuencode(cpio->archive); 593 break; 594 } 595 if (r < ARCHIVE_WARN) 596 lafe_errc(1, 0, "Requested filter not available"); 597 r = archive_write_set_format_by_name(cpio->archive, cpio->format); 598 if (r != ARCHIVE_OK) 599 lafe_errc(1, 0, "%s", archive_error_string(cpio->archive)); 600 archive_write_set_bytes_per_block(cpio->archive, cpio->bytes_per_block); 601 cpio->linkresolver = archive_entry_linkresolver_new(); 602 archive_entry_linkresolver_set_strategy(cpio->linkresolver, 603 archive_format(cpio->archive)); 604 if (cpio->passphrase != NULL) 605 r = archive_write_set_passphrase(cpio->archive, 606 cpio->passphrase); 607 else 608 r = archive_write_set_passphrase_callback(cpio->archive, cpio, 609 &passphrase_callback); 610 if (r != ARCHIVE_OK) 611 lafe_errc(1, 0, "%s", archive_error_string(cpio->archive)); 612 613 /* 614 * The main loop: Copy each file into the output archive. 615 */ 616 r = archive_write_open_filename(cpio->archive, cpio->filename); 617 if (r != ARCHIVE_OK) 618 lafe_errc(1, 0, "%s", archive_error_string(cpio->archive)); 619 lr = lafe_line_reader("-", cpio->option_null); 620 while ((p = lafe_line_reader_next(lr)) != NULL) 621 file_to_archive(cpio, p); 622 lafe_line_reader_free(lr); 623 624 /* 625 * The hardlink detection may have queued up a couple of entries 626 * that can now be flushed. 627 */ 628 entry = NULL; 629 archive_entry_linkify(cpio->linkresolver, &entry, &spare); 630 while (entry != NULL) { 631 entry_to_archive(cpio, entry); 632 archive_entry_free(entry); 633 entry = NULL; 634 archive_entry_linkify(cpio->linkresolver, &entry, &spare); 635 } 636 637 r = archive_write_close(cpio->archive); 638 if (cpio->dot) 639 fprintf(stderr, "\n"); 640 if (r != ARCHIVE_OK) 641 lafe_errc(1, 0, "%s", archive_error_string(cpio->archive)); 642 643 if (!cpio->quiet) { 644 int64_t blocks = 645 (archive_filter_bytes(cpio->archive, 0) + 511) 646 / 512; 647 fprintf(stderr, "%lu %s\n", (unsigned long)blocks, 648 blocks == 1 ? "block" : "blocks"); 649 } 650 archive_write_free(cpio->archive); 651 archive_entry_linkresolver_free(cpio->linkresolver); 652 } 653 654 static const char * 655 remove_leading_slash(const char *p) 656 { 657 const char *rp; 658 659 /* Remove leading "//./" or "//?/" or "//?/UNC/" 660 * (absolute path prefixes used by Windows API) */ 661 if ((p[0] == '/' || p[0] == '\\') && 662 (p[1] == '/' || p[1] == '\\') && 663 (p[2] == '.' || p[2] == '?') && 664 (p[3] == '/' || p[3] == '\\')) 665 { 666 if (p[2] == '?' && 667 (p[4] == 'U' || p[4] == 'u') && 668 (p[5] == 'N' || p[5] == 'n') && 669 (p[6] == 'C' || p[6] == 'c') && 670 (p[7] == '/' || p[7] == '\\')) 671 p += 8; 672 else 673 p += 4; 674 } 675 do { 676 rp = p; 677 /* Remove leading drive letter from archives created 678 * on Windows. */ 679 if (((p[0] >= 'a' && p[0] <= 'z') || 680 (p[0] >= 'A' && p[0] <= 'Z')) && 681 p[1] == ':') { 682 p += 2; 683 } 684 /* Remove leading "/../", "//", etc. */ 685 while (p[0] == '/' || p[0] == '\\') { 686 if (p[1] == '.' && p[2] == '.' && 687 (p[3] == '/' || p[3] == '\\')) { 688 p += 3; /* Remove "/..", leave "/" 689 * for next pass. */ 690 } else 691 p += 1; /* Remove "/". */ 692 } 693 } while (rp != p); 694 return (p); 695 } 696 697 /* 698 * This is used by both out mode (to copy objects from disk into 699 * an archive) and pass mode (to copy objects from disk to 700 * an archive_write_disk "archive"). 701 */ 702 static int 703 file_to_archive(struct cpio *cpio, const char *srcpath) 704 { 705 const char *destpath; 706 struct archive_entry *entry, *spare; 707 size_t len; 708 int r; 709 710 /* 711 * Create an archive_entry describing the source file. 712 * 713 */ 714 entry = archive_entry_new(); 715 if (entry == NULL) 716 lafe_errc(1, 0, "Couldn't allocate entry"); 717 archive_entry_copy_sourcepath(entry, srcpath); 718 r = archive_read_disk_entry_from_file(cpio->archive_read_disk, 719 entry, -1, NULL); 720 if (r < ARCHIVE_FAILED) 721 lafe_errc(1, 0, "%s", 722 archive_error_string(cpio->archive_read_disk)); 723 if (r < ARCHIVE_OK) 724 lafe_warnc(0, "%s", 725 archive_error_string(cpio->archive_read_disk)); 726 if (r <= ARCHIVE_FAILED) { 727 archive_entry_free(entry); 728 cpio->return_value = 1; 729 return (r); 730 } 731 732 if (cpio->uid_override >= 0) { 733 archive_entry_set_uid(entry, cpio->uid_override); 734 archive_entry_set_uname(entry, cpio->uname_override); 735 } 736 if (cpio->gid_override >= 0) { 737 archive_entry_set_gid(entry, cpio->gid_override); 738 archive_entry_set_gname(entry, cpio->gname_override); 739 } 740 741 /* 742 * Generate a destination path for this entry. 743 * "destination path" is the name to which it will be copied in 744 * pass mode or the name that will go into the archive in 745 * output mode. 746 */ 747 destpath = srcpath; 748 if (cpio->destdir) { 749 len = cpio->destdir_len + strlen(srcpath) + 8; 750 if (len >= cpio->pass_destpath_alloc) { 751 while (len >= cpio->pass_destpath_alloc) { 752 cpio->pass_destpath_alloc += 512; 753 cpio->pass_destpath_alloc *= 2; 754 } 755 free(cpio->pass_destpath); 756 cpio->pass_destpath = malloc(cpio->pass_destpath_alloc); 757 if (cpio->pass_destpath == NULL) 758 lafe_errc(1, ENOMEM, 759 "Can't allocate path buffer"); 760 } 761 strcpy(cpio->pass_destpath, cpio->destdir); 762 strcat(cpio->pass_destpath, remove_leading_slash(srcpath)); 763 destpath = cpio->pass_destpath; 764 } 765 if (cpio->option_rename) 766 destpath = cpio_rename(destpath); 767 if (destpath == NULL) { 768 archive_entry_free(entry); 769 return (0); 770 } 771 archive_entry_copy_pathname(entry, destpath); 772 773 /* 774 * If we're trying to preserve hardlinks, match them here. 775 */ 776 spare = NULL; 777 if (cpio->linkresolver != NULL 778 && archive_entry_filetype(entry) != AE_IFDIR) { 779 archive_entry_linkify(cpio->linkresolver, &entry, &spare); 780 } 781 782 if (entry != NULL) { 783 r = entry_to_archive(cpio, entry); 784 archive_entry_free(entry); 785 if (spare != NULL) { 786 if (r == 0) 787 r = entry_to_archive(cpio, spare); 788 archive_entry_free(spare); 789 } 790 } 791 return (r); 792 } 793 794 static int 795 entry_to_archive(struct cpio *cpio, struct archive_entry *entry) 796 { 797 const char *destpath = archive_entry_pathname(entry); 798 const char *srcpath = archive_entry_sourcepath(entry); 799 int fd = -1; 800 ssize_t bytes_read; 801 int r; 802 803 /* Print out the destination name to the user. */ 804 if (cpio->verbose) 805 fprintf(stderr,"%s", destpath); 806 if (cpio->dot) 807 fprintf(stderr, "."); 808 809 /* 810 * Option_link only makes sense in pass mode and for 811 * regular files. Also note: if a link operation fails 812 * because of cross-device restrictions, we'll fall back 813 * to copy mode for that entry. 814 * 815 * TODO: Test other cpio implementations to see if they 816 * hard-link anything other than regular files here. 817 */ 818 if (cpio->option_link 819 && archive_entry_filetype(entry) == AE_IFREG) 820 { 821 struct archive_entry *t; 822 /* Save the original entry in case we need it later. */ 823 t = archive_entry_clone(entry); 824 if (t == NULL) 825 lafe_errc(1, ENOMEM, "Can't create link"); 826 /* Note: link(2) doesn't create parent directories, 827 * so we use archive_write_header() instead as a 828 * convenience. */ 829 archive_entry_set_hardlink(t, srcpath); 830 /* This is a straight link that carries no data. */ 831 archive_entry_set_size(t, 0); 832 r = archive_write_header(cpio->archive, t); 833 archive_entry_free(t); 834 if (r != ARCHIVE_OK) 835 lafe_warnc(archive_errno(cpio->archive), 836 "%s", archive_error_string(cpio->archive)); 837 if (r == ARCHIVE_FATAL) 838 exit(1); 839 #ifdef EXDEV 840 if (r != ARCHIVE_OK && archive_errno(cpio->archive) == EXDEV) { 841 /* Cross-device link: Just fall through and use 842 * the original entry to copy the file over. */ 843 lafe_warnc(0, "Copying file instead"); 844 } else 845 #endif 846 return (0); 847 } 848 849 /* 850 * Make sure we can open the file (if necessary) before 851 * trying to write the header. 852 */ 853 if (archive_entry_filetype(entry) == AE_IFREG) { 854 if (archive_entry_size(entry) > 0) { 855 fd = open(srcpath, O_RDONLY | O_BINARY); 856 if (fd < 0) { 857 lafe_warnc(errno, 858 "%s: could not open file", srcpath); 859 goto cleanup; 860 } 861 } 862 } else { 863 archive_entry_set_size(entry, 0); 864 } 865 866 r = archive_write_header(cpio->archive, entry); 867 868 if (r != ARCHIVE_OK) 869 lafe_warnc(archive_errno(cpio->archive), 870 "%s: %s", 871 srcpath, 872 archive_error_string(cpio->archive)); 873 874 if (r == ARCHIVE_FATAL) 875 exit(1); 876 877 if (r >= ARCHIVE_WARN && archive_entry_size(entry) > 0 && fd >= 0) { 878 bytes_read = read(fd, cpio->buff, (unsigned)cpio->buff_size); 879 while (bytes_read > 0) { 880 ssize_t bytes_write; 881 bytes_write = archive_write_data(cpio->archive, 882 cpio->buff, bytes_read); 883 if (bytes_write < 0) 884 lafe_errc(1, archive_errno(cpio->archive), 885 "%s", archive_error_string(cpio->archive)); 886 if (bytes_write < bytes_read) { 887 lafe_warnc(0, 888 "Truncated write; file may have " 889 "grown while being archived."); 890 } 891 bytes_read = read(fd, cpio->buff, 892 (unsigned)cpio->buff_size); 893 } 894 } 895 896 fd = restore_time(cpio, entry, srcpath, fd); 897 898 cleanup: 899 if (cpio->verbose) 900 fprintf(stderr,"\n"); 901 if (fd >= 0) 902 close(fd); 903 return (0); 904 } 905 906 static int 907 restore_time(struct cpio *cpio, struct archive_entry *entry, 908 const char *name, int fd) 909 { 910 #ifndef HAVE_UTIMES 911 static int warned = 0; 912 913 (void)cpio; /* UNUSED */ 914 (void)entry; /* UNUSED */ 915 (void)name; /* UNUSED */ 916 917 if (!warned) 918 lafe_warnc(0, "Can't restore access times on this platform"); 919 warned = 1; 920 return (fd); 921 #else 922 #if defined(_WIN32) && !defined(__CYGWIN__) 923 struct __timeval times[2]; 924 #else 925 struct timeval times[2]; 926 #endif 927 928 if (!cpio->option_atime_restore) 929 return (fd); 930 931 times[1].tv_sec = archive_entry_mtime(entry); 932 times[1].tv_usec = archive_entry_mtime_nsec(entry) / 1000; 933 934 times[0].tv_sec = archive_entry_atime(entry); 935 times[0].tv_usec = archive_entry_atime_nsec(entry) / 1000; 936 937 #if defined(HAVE_FUTIMES) && !defined(__CYGWIN__) 938 if (fd >= 0 && futimes(fd, times) == 0) 939 return (fd); 940 #endif 941 /* 942 * Some platform cannot restore access times if the file descriptor 943 * is still opened. 944 */ 945 if (fd >= 0) { 946 close(fd); 947 fd = -1; 948 } 949 950 #ifdef HAVE_LUTIMES 951 if (lutimes(name, times) != 0) 952 #else 953 if ((AE_IFLNK != archive_entry_filetype(entry)) 954 && utimes(name, times) != 0) 955 #endif 956 lafe_warnc(errno, "Can't update time for %s", name); 957 #endif 958 return (fd); 959 } 960 961 962 static void 963 mode_in(struct cpio *cpio) 964 { 965 struct archive *a; 966 struct archive_entry *entry; 967 struct archive *ext; 968 const char *destpath; 969 int r; 970 971 ext = archive_write_disk_new(); 972 if (ext == NULL) 973 lafe_errc(1, 0, "Couldn't allocate restore object"); 974 r = archive_write_disk_set_options(ext, cpio->extract_flags); 975 if (r != ARCHIVE_OK) 976 lafe_errc(1, 0, "%s", archive_error_string(ext)); 977 a = archive_read_new(); 978 if (a == NULL) 979 lafe_errc(1, 0, "Couldn't allocate archive object"); 980 archive_read_support_filter_all(a); 981 archive_read_support_format_all(a); 982 if (cpio->option_pwb) 983 archive_read_set_options(a, "pwb"); 984 if (cpio->passphrase != NULL) 985 r = archive_read_add_passphrase(a, cpio->passphrase); 986 else 987 r = archive_read_set_passphrase_callback(a, cpio, 988 &passphrase_callback); 989 if (r != ARCHIVE_OK) 990 lafe_errc(1, 0, "%s", archive_error_string(a)); 991 992 if (archive_read_open_filename(a, cpio->filename, 993 cpio->bytes_per_block)) 994 lafe_errc(1, archive_errno(a), 995 "%s", archive_error_string(a)); 996 for (;;) { 997 r = archive_read_next_header(a, &entry); 998 if (r == ARCHIVE_EOF) 999 break; 1000 if (r != ARCHIVE_OK) { 1001 lafe_errc(1, archive_errno(a), 1002 "%s", archive_error_string(a)); 1003 } 1004 if (archive_match_path_excluded(cpio->matching, entry)) 1005 continue; 1006 if (cpio->option_rename) { 1007 destpath = cpio_rename(archive_entry_pathname(entry)); 1008 archive_entry_set_pathname(entry, destpath); 1009 } else 1010 destpath = archive_entry_pathname(entry); 1011 if (destpath == NULL) 1012 continue; 1013 if (cpio->verbose) 1014 fprintf(stderr, "%s\n", destpath); 1015 if (cpio->dot) 1016 fprintf(stderr, "."); 1017 if (cpio->uid_override >= 0) 1018 archive_entry_set_uid(entry, cpio->uid_override); 1019 if (cpio->gid_override >= 0) 1020 archive_entry_set_gid(entry, cpio->gid_override); 1021 r = archive_write_header(ext, entry); 1022 if (r != ARCHIVE_OK) { 1023 fprintf(stderr, "%s: %s\n", 1024 archive_entry_pathname(entry), 1025 archive_error_string(ext)); 1026 } else if (!archive_entry_size_is_set(entry) 1027 || archive_entry_size(entry) > 0) { 1028 r = extract_data(a, ext); 1029 if (r != ARCHIVE_OK) 1030 cpio->return_value = 1; 1031 } 1032 } 1033 r = archive_read_close(a); 1034 if (cpio->dot) 1035 fprintf(stderr, "\n"); 1036 if (r != ARCHIVE_OK) 1037 lafe_errc(1, 0, "%s", archive_error_string(a)); 1038 r = archive_write_close(ext); 1039 if (r != ARCHIVE_OK) 1040 lafe_errc(1, 0, "%s", archive_error_string(ext)); 1041 if (!cpio->quiet) { 1042 int64_t blocks = (archive_filter_bytes(a, 0) + 511) 1043 / 512; 1044 fprintf(stderr, "%lu %s\n", (unsigned long)blocks, 1045 blocks == 1 ? "block" : "blocks"); 1046 } 1047 archive_read_free(a); 1048 archive_write_free(ext); 1049 exit(cpio->return_value); 1050 } 1051 1052 /* 1053 * Exits if there's a fatal error. Returns ARCHIVE_OK 1054 * if everything is kosher. 1055 */ 1056 static int 1057 extract_data(struct archive *ar, struct archive *aw) 1058 { 1059 int r; 1060 size_t size; 1061 const void *block; 1062 int64_t offset; 1063 1064 for (;;) { 1065 r = archive_read_data_block(ar, &block, &size, &offset); 1066 if (r == ARCHIVE_EOF) 1067 return (ARCHIVE_OK); 1068 if (r != ARCHIVE_OK) { 1069 lafe_warnc(archive_errno(ar), 1070 "%s", archive_error_string(ar)); 1071 exit(1); 1072 } 1073 r = (int)archive_write_data_block(aw, block, size, offset); 1074 if (r != ARCHIVE_OK) { 1075 lafe_warnc(archive_errno(aw), 1076 "%s", archive_error_string(aw)); 1077 return (r); 1078 } 1079 } 1080 } 1081 1082 static void 1083 mode_list(struct cpio *cpio) 1084 { 1085 struct archive *a; 1086 struct archive_entry *entry; 1087 int r; 1088 1089 a = archive_read_new(); 1090 if (a == NULL) 1091 lafe_errc(1, 0, "Couldn't allocate archive object"); 1092 archive_read_support_filter_all(a); 1093 archive_read_support_format_all(a); 1094 if (cpio->option_pwb) 1095 archive_read_set_options(a, "pwb"); 1096 if (cpio->passphrase != NULL) 1097 r = archive_read_add_passphrase(a, cpio->passphrase); 1098 else 1099 r = archive_read_set_passphrase_callback(a, cpio, 1100 &passphrase_callback); 1101 if (r != ARCHIVE_OK) 1102 lafe_errc(1, 0, "%s", archive_error_string(a)); 1103 1104 if (archive_read_open_filename(a, cpio->filename, 1105 cpio->bytes_per_block)) 1106 lafe_errc(1, archive_errno(a), 1107 "%s", archive_error_string(a)); 1108 for (;;) { 1109 r = archive_read_next_header(a, &entry); 1110 if (r == ARCHIVE_EOF) 1111 break; 1112 if (r != ARCHIVE_OK) { 1113 lafe_errc(1, archive_errno(a), 1114 "%s", archive_error_string(a)); 1115 } 1116 if (archive_match_path_excluded(cpio->matching, entry)) 1117 continue; 1118 if (cpio->verbose) 1119 list_item_verbose(cpio, entry); 1120 else 1121 fprintf(stdout, "%s\n", archive_entry_pathname(entry)); 1122 } 1123 r = archive_read_close(a); 1124 if (r != ARCHIVE_OK) 1125 lafe_errc(1, 0, "%s", archive_error_string(a)); 1126 if (!cpio->quiet) { 1127 int64_t blocks = (archive_filter_bytes(a, 0) + 511) 1128 / 512; 1129 fprintf(stderr, "%lu %s\n", (unsigned long)blocks, 1130 blocks == 1 ? "block" : "blocks"); 1131 } 1132 archive_read_free(a); 1133 exit(0); 1134 } 1135 1136 /* 1137 * Display information about the current file. 1138 * 1139 * The format here roughly duplicates the output of 'ls -l'. 1140 * This is based on SUSv2, where 'tar tv' is documented as 1141 * listing additional information in an "unspecified format," 1142 * and 'pax -l' is documented as using the same format as 'ls -l'. 1143 */ 1144 static void 1145 list_item_verbose(struct cpio *cpio, struct archive_entry *entry) 1146 { 1147 char size[32]; 1148 char date[32]; 1149 char uids[22], gids[22]; 1150 const char *uname, *gname; 1151 FILE *out = stdout; 1152 const char *fmt; 1153 time_t mtime; 1154 static time_t now; 1155 struct tm *ltime; 1156 #if defined(HAVE_LOCALTIME_R) || defined(HAVE_LOCALTIME_S) 1157 struct tm tmbuf; 1158 #endif 1159 1160 if (!now) 1161 time(&now); 1162 1163 if (cpio->option_numeric_uid_gid) { 1164 /* Format numeric uid/gid for display. */ 1165 strcpy(uids, cpio_i64toa(archive_entry_uid(entry))); 1166 uname = uids; 1167 strcpy(gids, cpio_i64toa(archive_entry_gid(entry))); 1168 gname = gids; 1169 } else { 1170 /* Use uname if it's present, else lookup name from uid. */ 1171 uname = archive_entry_uname(entry); 1172 if (uname == NULL) 1173 uname = lookup_uname(cpio, (uid_t)archive_entry_uid(entry)); 1174 /* Use gname if it's present, else lookup name from gid. */ 1175 gname = archive_entry_gname(entry); 1176 if (gname == NULL) 1177 gname = lookup_gname(cpio, (uid_t)archive_entry_gid(entry)); 1178 } 1179 1180 /* Print device number or file size. */ 1181 if (archive_entry_filetype(entry) == AE_IFCHR 1182 || archive_entry_filetype(entry) == AE_IFBLK) { 1183 snprintf(size, sizeof(size), "%lu,%lu", 1184 (unsigned long)archive_entry_rdevmajor(entry), 1185 (unsigned long)archive_entry_rdevminor(entry)); 1186 } else { 1187 strcpy(size, cpio_i64toa(archive_entry_size(entry))); 1188 } 1189 1190 /* Format the time using 'ls -l' conventions. */ 1191 mtime = archive_entry_mtime(entry); 1192 #if defined(_WIN32) && !defined(__CYGWIN__) 1193 /* Windows' strftime function does not support %e format. */ 1194 if (mtime - now > 365*86400/2 1195 || mtime - now < -365*86400/2) 1196 fmt = cpio->day_first ? "%d %b %Y" : "%b %d %Y"; 1197 else 1198 fmt = cpio->day_first ? "%d %b %H:%M" : "%b %d %H:%M"; 1199 #else 1200 if (mtime - now > 365*86400/2 1201 || mtime - now < -365*86400/2) 1202 fmt = cpio->day_first ? "%e %b %Y" : "%b %e %Y"; 1203 else 1204 fmt = cpio->day_first ? "%e %b %H:%M" : "%b %e %H:%M"; 1205 #endif 1206 #if defined(HAVE_LOCALTIME_S) 1207 ltime = localtime_s(&tmbuf, &mtime) ? NULL : &tmbuf; 1208 #elif defined(HAVE_LOCALTIME_R) 1209 ltime = localtime_r(&mtime, &tmbuf); 1210 #else 1211 ltime = localtime(&mtime); 1212 #endif 1213 if (ltime != NULL) 1214 strftime(date, sizeof(date), fmt, ltime); 1215 else 1216 strcpy(date, "invalid mtime"); 1217 1218 fprintf(out, "%s%3d %-8s %-8s %8s %12s %s", 1219 archive_entry_strmode(entry), 1220 archive_entry_nlink(entry), 1221 uname, gname, size, date, 1222 archive_entry_pathname(entry)); 1223 1224 /* Extra information for links. */ 1225 if (archive_entry_hardlink(entry)) /* Hard link */ 1226 fprintf(out, " link to %s", archive_entry_hardlink(entry)); 1227 else if (archive_entry_symlink(entry)) /* Symbolic link */ 1228 fprintf(out, " -> %s", archive_entry_symlink(entry)); 1229 fprintf(out, "\n"); 1230 } 1231 1232 static void 1233 mode_pass(struct cpio *cpio, const char *destdir) 1234 { 1235 struct lafe_line_reader *lr; 1236 const char *p; 1237 int r; 1238 1239 /* Ensure target dir has a trailing '/' to simplify path surgery. */ 1240 cpio->destdir_len = strlen(destdir); 1241 cpio->destdir = malloc(cpio->destdir_len + 8); 1242 memcpy(cpio->destdir, destdir, cpio->destdir_len); 1243 if (cpio->destdir_len == 0 || destdir[cpio->destdir_len - 1] != '/') 1244 cpio->destdir[cpio->destdir_len++] = '/'; 1245 cpio->destdir[cpio->destdir_len] = '\0'; 1246 1247 cpio->archive = archive_write_disk_new(); 1248 if (cpio->archive == NULL) 1249 lafe_errc(1, 0, "Failed to allocate archive object"); 1250 r = archive_write_disk_set_options(cpio->archive, cpio->extract_flags); 1251 if (r != ARCHIVE_OK) 1252 lafe_errc(1, 0, "%s", archive_error_string(cpio->archive)); 1253 cpio->linkresolver = archive_entry_linkresolver_new(); 1254 archive_write_disk_set_standard_lookup(cpio->archive); 1255 1256 cpio->archive_read_disk = archive_read_disk_new(); 1257 if (cpio->archive_read_disk == NULL) 1258 lafe_errc(1, 0, "Failed to allocate archive object"); 1259 if (cpio->option_follow_links) 1260 archive_read_disk_set_symlink_logical(cpio->archive_read_disk); 1261 else 1262 archive_read_disk_set_symlink_physical(cpio->archive_read_disk); 1263 archive_read_disk_set_standard_lookup(cpio->archive_read_disk); 1264 1265 lr = lafe_line_reader("-", cpio->option_null); 1266 while ((p = lafe_line_reader_next(lr)) != NULL) 1267 file_to_archive(cpio, p); 1268 lafe_line_reader_free(lr); 1269 1270 archive_entry_linkresolver_free(cpio->linkresolver); 1271 r = archive_write_close(cpio->archive); 1272 if (cpio->dot) 1273 fprintf(stderr, "\n"); 1274 if (r != ARCHIVE_OK) 1275 lafe_errc(1, 0, "%s", archive_error_string(cpio->archive)); 1276 1277 if (!cpio->quiet) { 1278 int64_t blocks = 1279 (archive_filter_bytes(cpio->archive, 0) + 511) 1280 / 512; 1281 fprintf(stderr, "%lu %s\n", (unsigned long)blocks, 1282 blocks == 1 ? "block" : "blocks"); 1283 } 1284 1285 archive_write_free(cpio->archive); 1286 free(cpio->pass_destpath); 1287 } 1288 1289 /* 1290 * Prompt for a new name for this entry. Returns a pointer to the 1291 * new name or NULL if the entry should not be copied. This 1292 * implements the semantics defined in POSIX.1-1996, which specifies 1293 * that an input of '.' means the name should be unchanged. GNU cpio 1294 * treats '.' as a literal new name. 1295 */ 1296 static const char * 1297 cpio_rename(const char *name) 1298 { 1299 static char buff[1024]; 1300 FILE *t; 1301 char *p, *ret; 1302 #if defined(_WIN32) && !defined(__CYGWIN__) 1303 FILE *to; 1304 1305 t = fopen("CONIN$", "r"); 1306 if (t == NULL) 1307 return (name); 1308 to = fopen("CONOUT$", "w"); 1309 if (to == NULL) { 1310 fclose(t); 1311 return (name); 1312 } 1313 fprintf(to, "%s (Enter/./(new name))? ", name); 1314 fclose(to); 1315 #else 1316 t = fopen("/dev/tty", "r+"); 1317 if (t == NULL) 1318 return (name); 1319 fprintf(t, "%s (Enter/./(new name))? ", name); 1320 fflush(t); 1321 #endif 1322 1323 p = fgets(buff, sizeof(buff), t); 1324 fclose(t); 1325 if (p == NULL) 1326 /* End-of-file is a blank line. */ 1327 return (NULL); 1328 1329 while (*p == ' ' || *p == '\t') 1330 ++p; 1331 if (*p == '\n' || *p == '\0') 1332 /* Empty line. */ 1333 return (NULL); 1334 if (*p == '.' && p[1] == '\n') 1335 /* Single period preserves original name. */ 1336 return (name); 1337 ret = p; 1338 /* Trim the final newline. */ 1339 while (*p != '\0' && *p != '\n') 1340 ++p; 1341 /* Overwrite the final \n with a null character. */ 1342 *p = '\0'; 1343 return (ret); 1344 } 1345 1346 static void 1347 free_cache(struct name_cache *cache) 1348 { 1349 size_t i; 1350 1351 if (cache != NULL) { 1352 for (i = 0; i < cache->size; i++) 1353 free(cache->cache[i].name); 1354 free(cache); 1355 } 1356 } 1357 1358 /* 1359 * Lookup uname/gname from uid/gid, return NULL if no match. 1360 */ 1361 static const char * 1362 lookup_name(struct cpio *cpio, struct name_cache **name_cache_variable, 1363 int (*lookup_fn)(struct cpio *, const char **, id_t), id_t id) 1364 { 1365 char asnum[16]; 1366 struct name_cache *cache; 1367 const char *name; 1368 int slot; 1369 1370 1371 if (*name_cache_variable == NULL) { 1372 *name_cache_variable = calloc(1, sizeof(struct name_cache)); 1373 if (*name_cache_variable == NULL) 1374 lafe_errc(1, ENOMEM, "No more memory"); 1375 (*name_cache_variable)->size = name_cache_size; 1376 } 1377 1378 cache = *name_cache_variable; 1379 cache->probes++; 1380 1381 slot = id % cache->size; 1382 if (cache->cache[slot].name != NULL) { 1383 if (cache->cache[slot].id == id) { 1384 cache->hits++; 1385 return (cache->cache[slot].name); 1386 } 1387 free(cache->cache[slot].name); 1388 cache->cache[slot].name = NULL; 1389 } 1390 1391 if (lookup_fn(cpio, &name, id)) { 1392 /* If lookup failed, format it as a number. */ 1393 snprintf(asnum, sizeof(asnum), "%u", (unsigned)id); 1394 name = asnum; 1395 } 1396 1397 cache->cache[slot].name = strdup(name); 1398 if (cache->cache[slot].name != NULL) { 1399 cache->cache[slot].id = id; 1400 return (cache->cache[slot].name); 1401 } 1402 1403 /* 1404 * Conveniently, NULL marks an empty slot, so 1405 * if the strdup() fails, we've just failed to 1406 * cache it. No recovery necessary. 1407 */ 1408 return (NULL); 1409 } 1410 1411 static const char * 1412 lookup_uname(struct cpio *cpio, uid_t uid) 1413 { 1414 return (lookup_name(cpio, &cpio->uname_cache, 1415 &lookup_uname_helper, (id_t)uid)); 1416 } 1417 1418 static int 1419 lookup_uname_helper(struct cpio *cpio, const char **name, id_t id) 1420 { 1421 struct passwd *pwent; 1422 1423 (void)cpio; /* UNUSED */ 1424 1425 errno = 0; 1426 pwent = getpwuid((uid_t)id); 1427 if (pwent == NULL) { 1428 if (errno && errno != ENOENT) 1429 lafe_warnc(errno, "getpwuid(%s) failed", 1430 cpio_i64toa((int64_t)id)); 1431 return 1; 1432 } 1433 1434 *name = pwent->pw_name; 1435 return 0; 1436 } 1437 1438 static const char * 1439 lookup_gname(struct cpio *cpio, gid_t gid) 1440 { 1441 return (lookup_name(cpio, &cpio->gname_cache, 1442 &lookup_gname_helper, (id_t)gid)); 1443 } 1444 1445 static int 1446 lookup_gname_helper(struct cpio *cpio, const char **name, id_t id) 1447 { 1448 struct group *grent; 1449 1450 (void)cpio; /* UNUSED */ 1451 1452 errno = 0; 1453 grent = getgrgid((gid_t)id); 1454 if (grent == NULL) { 1455 if (errno && errno != ENOENT) 1456 lafe_warnc(errno, "getgrgid(%s) failed", 1457 cpio_i64toa((int64_t)id)); 1458 return 1; 1459 } 1460 1461 *name = grent->gr_name; 1462 return 0; 1463 } 1464 1465 /* 1466 * It would be nice to just use printf() for formatting large numbers, 1467 * but the compatibility problems are a big headache. Hence the 1468 * following simple utility function. 1469 */ 1470 const char * 1471 cpio_i64toa(int64_t n0) 1472 { 1473 /* 2^64 =~ 1.8 * 10^19, so 20 decimal digits suffice. 1474 * We also need 1 byte for '-' and 1 for '\0'. 1475 */ 1476 static char buff[22]; 1477 int64_t n = n0 < 0 ? -n0 : n0; 1478 char *p = buff + sizeof(buff); 1479 1480 *--p = '\0'; 1481 do { 1482 *--p = '0' + (int)(n % 10); 1483 n /= 10; 1484 } while (n > 0); 1485 if (n0 < 0) 1486 *--p = '-'; 1487 return p; 1488 } 1489 1490 #define PPBUFF_SIZE 1024 1491 static const char * 1492 passphrase_callback(struct archive *a, void *_client_data) 1493 { 1494 struct cpio *cpio = (struct cpio *)_client_data; 1495 (void)a; /* UNUSED */ 1496 1497 if (cpio->ppbuff == NULL) { 1498 cpio->ppbuff = malloc(PPBUFF_SIZE); 1499 if (cpio->ppbuff == NULL) 1500 lafe_errc(1, errno, "Out of memory"); 1501 } 1502 return lafe_readpassphrase("Enter passphrase:", 1503 cpio->ppbuff, PPBUFF_SIZE); 1504 } 1505 1506 static void 1507 passphrase_free(char *ppbuff) 1508 { 1509 if (ppbuff != NULL) { 1510 memset(ppbuff, 0, PPBUFF_SIZE); 1511 free(ppbuff); 1512 } 1513 } 1514