cpio.c revision 315432
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: stable/11/contrib/libarchive/cpio/cpio.c 315432 2017-03-16 23:07:35Z mm $"); 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 94struct 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 104static int extract_data(struct archive *, struct archive *); 105const char * cpio_i64toa(int64_t); 106static const char *cpio_rename(const char *name); 107static int entry_to_archive(struct cpio *, struct archive_entry *); 108static int file_to_archive(struct cpio *, const char *); 109static void free_cache(struct name_cache *cache); 110static void list_item_verbose(struct cpio *, struct archive_entry *); 111static void long_help(void) __LA_DEAD; 112static const char *lookup_gname(struct cpio *, gid_t gid); 113static int lookup_gname_helper(struct cpio *, 114 const char **name, id_t gid); 115static const char *lookup_uname(struct cpio *, uid_t uid); 116static int lookup_uname_helper(struct cpio *, 117 const char **name, id_t uid); 118static void mode_in(struct cpio *) __LA_DEAD; 119static void mode_list(struct cpio *) __LA_DEAD; 120static void mode_out(struct cpio *); 121static void mode_pass(struct cpio *, const char *); 122static const char *remove_leading_slash(const char *); 123static int restore_time(struct cpio *, struct archive_entry *, 124 const char *, int fd); 125static void usage(void) __LA_DEAD; 126static void version(void) __LA_DEAD; 127static const char * passphrase_callback(struct archive *, void *); 128static void passphrase_free(char *); 129 130int 131main(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 cpio->compress = opt; 273 break; 274 case 'm': /* POSIX 1997 */ 275 cpio->extract_flags |= ARCHIVE_EXTRACT_TIME; 276 break; 277 case 'n': /* GNU cpio */ 278 cpio->option_numeric_uid_gid = 1; 279 break; 280 case OPTION_NO_PRESERVE_OWNER: /* GNU cpio */ 281 cpio->extract_flags &= ~ARCHIVE_EXTRACT_OWNER; 282 break; 283 case 'O': /* GNU cpio */ 284 cpio->filename = cpio->argument; 285 break; 286 case 'o': /* POSIX 1997 */ 287 if (cpio->mode != '\0') 288 lafe_errc(1, 0, 289 "Cannot use both -o and -%c", cpio->mode); 290 cpio->mode = opt; 291 break; 292 case 'p': /* POSIX 1997 */ 293 if (cpio->mode != '\0') 294 lafe_errc(1, 0, 295 "Cannot use both -p and -%c", cpio->mode); 296 cpio->mode = opt; 297 cpio->extract_flags &= ~ARCHIVE_EXTRACT_SECURE_NODOTDOT; 298 cpio->extract_flags &= ~ARCHIVE_EXTRACT_SECURE_NOABSOLUTEPATHS; 299 break; 300 case OPTION_PASSPHRASE: 301 cpio->passphrase = cpio->argument; 302 break; 303 case OPTION_PRESERVE_OWNER: 304 cpio->extract_flags |= ARCHIVE_EXTRACT_OWNER; 305 break; 306 case OPTION_QUIET: /* GNU cpio */ 307 cpio->quiet = 1; 308 break; 309 case 'R': /* GNU cpio, also --owner */ 310 /* TODO: owner_parse should return uname/gname 311 * also; use that to set [ug]name_override. */ 312 errmsg = owner_parse(cpio->argument, &uid, &gid); 313 if (errmsg) { 314 lafe_warnc(-1, "%s", errmsg); 315 usage(); 316 } 317 if (uid != -1) { 318 cpio->uid_override = uid; 319 cpio->uname_override = NULL; 320 } 321 if (gid != -1) { 322 cpio->gid_override = gid; 323 cpio->gname_override = NULL; 324 } 325 break; 326 case 'r': /* POSIX 1997 */ 327 cpio->option_rename = 1; 328 break; 329 case 't': /* POSIX 1997 */ 330 cpio->option_list = 1; 331 break; 332 case 'u': /* POSIX 1997 */ 333 cpio->extract_flags 334 &= ~ARCHIVE_EXTRACT_NO_OVERWRITE_NEWER; 335 break; 336 case OPTION_UUENCODE: 337 cpio->add_filter = opt; 338 break; 339 case 'v': /* POSIX 1997 */ 340 cpio->verbose++; 341 break; 342 case 'V': /* GNU cpio */ 343 cpio->dot++; 344 break; 345 case OPTION_VERSION: /* GNU convention */ 346 version(); 347 break; 348#if 0 349 /* 350 * cpio_getopt() handles -W specially, so it's not 351 * available here. 352 */ 353 case 'W': /* Obscure, but useful GNU convention. */ 354 break; 355#endif 356 case 'y': /* tar convention */ 357 cpio->compress = opt; 358 break; 359 case 'Z': /* tar convention */ 360 cpio->compress = opt; 361 break; 362 case 'z': /* tar convention */ 363 cpio->compress = opt; 364 break; 365 default: 366 usage(); 367 } 368 } 369 370 /* 371 * Sanity-check args, error out on nonsensical combinations. 372 */ 373 /* -t implies -i if no mode was specified. */ 374 if (cpio->option_list && cpio->mode == '\0') 375 cpio->mode = 'i'; 376 /* -t requires -i */ 377 if (cpio->option_list && cpio->mode != 'i') 378 lafe_errc(1, 0, "Option -t requires -i"); 379 /* -n requires -it */ 380 if (cpio->option_numeric_uid_gid && !cpio->option_list) 381 lafe_errc(1, 0, "Option -n requires -it"); 382 /* Can only specify format when writing */ 383 if (cpio->format != NULL && cpio->mode != 'o') 384 lafe_errc(1, 0, "Option --format requires -o"); 385 /* -l requires -p */ 386 if (cpio->option_link && cpio->mode != 'p') 387 lafe_errc(1, 0, "Option -l requires -p"); 388 /* -v overrides -V */ 389 if (cpio->dot && cpio->verbose) 390 cpio->dot = 0; 391 /* TODO: Flag other nonsensical combinations. */ 392 393 switch (cpio->mode) { 394 case 'o': 395 /* TODO: Implement old binary format in libarchive, 396 use that here. */ 397 if (cpio->format == NULL) 398 cpio->format = "odc"; /* Default format */ 399 400 mode_out(cpio); 401 break; 402 case 'i': 403 while (*cpio->argv != NULL) { 404 if (archive_match_include_pattern(cpio->matching, 405 *cpio->argv) != ARCHIVE_OK) 406 lafe_errc(1, 0, "Error : %s", 407 archive_error_string(cpio->matching)); 408 --cpio->argc; 409 ++cpio->argv; 410 } 411 if (cpio->option_list) 412 mode_list(cpio); 413 else 414 mode_in(cpio); 415 break; 416 case 'p': 417 if (*cpio->argv == NULL || **cpio->argv == '\0') 418 lafe_errc(1, 0, 419 "-p mode requires a target directory"); 420 mode_pass(cpio, *cpio->argv); 421 break; 422 default: 423 lafe_errc(1, 0, 424 "Must specify at least one of -i, -o, or -p"); 425 } 426 427 archive_match_free(cpio->matching); 428 free_cache(cpio->gname_cache); 429 free_cache(cpio->uname_cache); 430 free(cpio->destdir); 431 passphrase_free(cpio->ppbuff); 432 return (cpio->return_value); 433} 434 435static void 436usage(void) 437{ 438 const char *p; 439 440 p = lafe_getprogname(); 441 442 fprintf(stderr, "Brief Usage:\n"); 443 fprintf(stderr, " List: %s -it < archive\n", p); 444 fprintf(stderr, " Extract: %s -i < archive\n", p); 445 fprintf(stderr, " Create: %s -o < filenames > archive\n", p); 446 fprintf(stderr, " Help: %s --help\n", p); 447 exit(1); 448} 449 450static const char *long_help_msg = 451 "First option must be a mode specifier:\n" 452 " -i Input -o Output -p Pass\n" 453 "Common Options:\n" 454 " -v Verbose filenames -V one dot per file\n" 455 "Create: %p -o [options] < [list of files] > [archive]\n" 456 " -J,-y,-z,--lzma Compress archive with xz/bzip2/gzip/lzma\n" 457 " --format {odc|newc|ustar} Select archive format\n" 458 "List: %p -it < [archive]\n" 459 "Extract: %p -i [options] < [archive]\n"; 460 461 462/* 463 * Note that the word 'bsdcpio' will always appear in the first line 464 * of output. 465 * 466 * In particular, /bin/sh scripts that need to test for the presence 467 * of bsdcpio can use the following template: 468 * 469 * if (cpio --help 2>&1 | grep bsdcpio >/dev/null 2>&1 ) then \ 470 * echo bsdcpio; else echo not bsdcpio; fi 471 */ 472static void 473long_help(void) 474{ 475 const char *prog; 476 const char *p; 477 478 prog = lafe_getprogname(); 479 480 fflush(stderr); 481 482 p = (strcmp(prog,"bsdcpio") != 0) ? "(bsdcpio)" : ""; 483 printf("%s%s: manipulate archive files\n", prog, p); 484 485 for (p = long_help_msg; *p != '\0'; p++) { 486 if (*p == '%') { 487 if (p[1] == 'p') { 488 fputs(prog, stdout); 489 p++; 490 } else 491 putchar('%'); 492 } else 493 putchar(*p); 494 } 495 version(); 496} 497 498static void 499version(void) 500{ 501 fprintf(stdout,"bsdcpio %s - %s\n", 502 BSDCPIO_VERSION_STRING, 503 archive_version_details()); 504 exit(0); 505} 506 507static void 508mode_out(struct cpio *cpio) 509{ 510 struct archive_entry *entry, *spare; 511 struct lafe_line_reader *lr; 512 const char *p; 513 int r; 514 515 if (cpio->option_append) 516 lafe_errc(1, 0, "Append mode not yet supported."); 517 518 cpio->archive_read_disk = archive_read_disk_new(); 519 if (cpio->archive_read_disk == NULL) 520 lafe_errc(1, 0, "Failed to allocate archive object"); 521 if (cpio->option_follow_links) 522 archive_read_disk_set_symlink_logical(cpio->archive_read_disk); 523 else 524 archive_read_disk_set_symlink_physical(cpio->archive_read_disk); 525 archive_read_disk_set_standard_lookup(cpio->archive_read_disk); 526 527 cpio->archive = archive_write_new(); 528 if (cpio->archive == NULL) 529 lafe_errc(1, 0, "Failed to allocate archive object"); 530 switch (cpio->compress) { 531 case OPTION_GRZIP: 532 r = archive_write_add_filter_grzip(cpio->archive); 533 break; 534 case 'J': 535 r = archive_write_add_filter_xz(cpio->archive); 536 break; 537 case OPTION_LRZIP: 538 r = archive_write_add_filter_lrzip(cpio->archive); 539 break; 540 case OPTION_LZ4: 541 r = archive_write_add_filter_lz4(cpio->archive); 542 break; 543 case OPTION_LZMA: 544 r = archive_write_add_filter_lzma(cpio->archive); 545 break; 546 case OPTION_LZOP: 547 r = archive_write_add_filter_lzop(cpio->archive); 548 break; 549 case 'j': case 'y': 550 r = archive_write_add_filter_bzip2(cpio->archive); 551 break; 552 case 'z': 553 r = archive_write_add_filter_gzip(cpio->archive); 554 break; 555 case 'Z': 556 r = archive_write_add_filter_compress(cpio->archive); 557 break; 558 default: 559 r = archive_write_add_filter_none(cpio->archive); 560 break; 561 } 562 if (r < ARCHIVE_WARN) 563 lafe_errc(1, 0, "Requested compression not available"); 564 switch (cpio->add_filter) { 565 case 0: 566 r = ARCHIVE_OK; 567 break; 568 case OPTION_B64ENCODE: 569 r = archive_write_add_filter_b64encode(cpio->archive); 570 break; 571 case OPTION_UUENCODE: 572 r = archive_write_add_filter_uuencode(cpio->archive); 573 break; 574 } 575 if (r < ARCHIVE_WARN) 576 lafe_errc(1, 0, "Requested filter not available"); 577 r = archive_write_set_format_by_name(cpio->archive, cpio->format); 578 if (r != ARCHIVE_OK) 579 lafe_errc(1, 0, "%s", archive_error_string(cpio->archive)); 580 archive_write_set_bytes_per_block(cpio->archive, cpio->bytes_per_block); 581 cpio->linkresolver = archive_entry_linkresolver_new(); 582 archive_entry_linkresolver_set_strategy(cpio->linkresolver, 583 archive_format(cpio->archive)); 584 if (cpio->passphrase != NULL) 585 r = archive_write_set_passphrase(cpio->archive, 586 cpio->passphrase); 587 else 588 r = archive_write_set_passphrase_callback(cpio->archive, cpio, 589 &passphrase_callback); 590 if (r != ARCHIVE_OK) 591 lafe_errc(1, 0, "%s", archive_error_string(cpio->archive)); 592 593 /* 594 * The main loop: Copy each file into the output archive. 595 */ 596 r = archive_write_open_filename(cpio->archive, cpio->filename); 597 if (r != ARCHIVE_OK) 598 lafe_errc(1, 0, "%s", archive_error_string(cpio->archive)); 599 lr = lafe_line_reader("-", cpio->option_null); 600 while ((p = lafe_line_reader_next(lr)) != NULL) 601 file_to_archive(cpio, p); 602 lafe_line_reader_free(lr); 603 604 /* 605 * The hardlink detection may have queued up a couple of entries 606 * that can now be flushed. 607 */ 608 entry = NULL; 609 archive_entry_linkify(cpio->linkresolver, &entry, &spare); 610 while (entry != NULL) { 611 entry_to_archive(cpio, entry); 612 archive_entry_free(entry); 613 entry = NULL; 614 archive_entry_linkify(cpio->linkresolver, &entry, &spare); 615 } 616 617 r = archive_write_close(cpio->archive); 618 if (cpio->dot) 619 fprintf(stderr, "\n"); 620 if (r != ARCHIVE_OK) 621 lafe_errc(1, 0, "%s", archive_error_string(cpio->archive)); 622 623 if (!cpio->quiet) { 624 int64_t blocks = 625 (archive_filter_bytes(cpio->archive, 0) + 511) 626 / 512; 627 fprintf(stderr, "%lu %s\n", (unsigned long)blocks, 628 blocks == 1 ? "block" : "blocks"); 629 } 630 archive_write_free(cpio->archive); 631} 632 633static const char * 634remove_leading_slash(const char *p) 635{ 636 const char *rp; 637 638 /* Remove leading "//./" or "//?/" or "//?/UNC/" 639 * (absolute path prefixes used by Windows API) */ 640 if ((p[0] == '/' || p[0] == '\\') && 641 (p[1] == '/' || p[1] == '\\') && 642 (p[2] == '.' || p[2] == '?') && 643 (p[3] == '/' || p[3] == '\\')) 644 { 645 if (p[2] == '?' && 646 (p[4] == 'U' || p[4] == 'u') && 647 (p[5] == 'N' || p[5] == 'n') && 648 (p[6] == 'C' || p[6] == 'c') && 649 (p[7] == '/' || p[7] == '\\')) 650 p += 8; 651 else 652 p += 4; 653 } 654 do { 655 rp = p; 656 /* Remove leading drive letter from archives created 657 * on Windows. */ 658 if (((p[0] >= 'a' && p[0] <= 'z') || 659 (p[0] >= 'A' && p[0] <= 'Z')) && 660 p[1] == ':') { 661 p += 2; 662 } 663 /* Remove leading "/../", "//", etc. */ 664 while (p[0] == '/' || p[0] == '\\') { 665 if (p[1] == '.' && p[2] == '.' && 666 (p[3] == '/' || p[3] == '\\')) { 667 p += 3; /* Remove "/..", leave "/" 668 * for next pass. */ 669 } else 670 p += 1; /* Remove "/". */ 671 } 672 } while (rp != p); 673 return (p); 674} 675 676/* 677 * This is used by both out mode (to copy objects from disk into 678 * an archive) and pass mode (to copy objects from disk to 679 * an archive_write_disk "archive"). 680 */ 681static int 682file_to_archive(struct cpio *cpio, const char *srcpath) 683{ 684 const char *destpath; 685 struct archive_entry *entry, *spare; 686 size_t len; 687 int r; 688 689 /* 690 * Create an archive_entry describing the source file. 691 * 692 */ 693 entry = archive_entry_new(); 694 if (entry == NULL) 695 lafe_errc(1, 0, "Couldn't allocate entry"); 696 archive_entry_copy_sourcepath(entry, srcpath); 697 r = archive_read_disk_entry_from_file(cpio->archive_read_disk, 698 entry, -1, NULL); 699 if (r < ARCHIVE_FAILED) 700 lafe_errc(1, 0, "%s", 701 archive_error_string(cpio->archive_read_disk)); 702 if (r < ARCHIVE_OK) 703 lafe_warnc(0, "%s", 704 archive_error_string(cpio->archive_read_disk)); 705 if (r <= ARCHIVE_FAILED) { 706 archive_entry_free(entry); 707 cpio->return_value = 1; 708 return (r); 709 } 710 711 if (cpio->uid_override >= 0) { 712 archive_entry_set_uid(entry, cpio->uid_override); 713 archive_entry_set_uname(entry, cpio->uname_override); 714 } 715 if (cpio->gid_override >= 0) { 716 archive_entry_set_gid(entry, cpio->gid_override); 717 archive_entry_set_gname(entry, cpio->gname_override); 718 } 719 720 /* 721 * Generate a destination path for this entry. 722 * "destination path" is the name to which it will be copied in 723 * pass mode or the name that will go into the archive in 724 * output mode. 725 */ 726 destpath = srcpath; 727 if (cpio->destdir) { 728 len = strlen(cpio->destdir) + strlen(srcpath) + 8; 729 if (len >= cpio->pass_destpath_alloc) { 730 while (len >= cpio->pass_destpath_alloc) { 731 cpio->pass_destpath_alloc += 512; 732 cpio->pass_destpath_alloc *= 2; 733 } 734 free(cpio->pass_destpath); 735 cpio->pass_destpath = malloc(cpio->pass_destpath_alloc); 736 if (cpio->pass_destpath == NULL) 737 lafe_errc(1, ENOMEM, 738 "Can't allocate path buffer"); 739 } 740 strcpy(cpio->pass_destpath, cpio->destdir); 741 strcat(cpio->pass_destpath, remove_leading_slash(srcpath)); 742 destpath = cpio->pass_destpath; 743 } 744 if (cpio->option_rename) 745 destpath = cpio_rename(destpath); 746 if (destpath == NULL) 747 return (0); 748 archive_entry_copy_pathname(entry, destpath); 749 750 /* 751 * If we're trying to preserve hardlinks, match them here. 752 */ 753 spare = NULL; 754 if (cpio->linkresolver != NULL 755 && archive_entry_filetype(entry) != AE_IFDIR) { 756 archive_entry_linkify(cpio->linkresolver, &entry, &spare); 757 } 758 759 if (entry != NULL) { 760 r = entry_to_archive(cpio, entry); 761 archive_entry_free(entry); 762 if (spare != NULL) { 763 if (r == 0) 764 r = entry_to_archive(cpio, spare); 765 archive_entry_free(spare); 766 } 767 } 768 return (r); 769} 770 771static int 772entry_to_archive(struct cpio *cpio, struct archive_entry *entry) 773{ 774 const char *destpath = archive_entry_pathname(entry); 775 const char *srcpath = archive_entry_sourcepath(entry); 776 int fd = -1; 777 ssize_t bytes_read; 778 int r; 779 780 /* Print out the destination name to the user. */ 781 if (cpio->verbose) 782 fprintf(stderr,"%s", destpath); 783 if (cpio->dot) 784 fprintf(stderr, "."); 785 786 /* 787 * Option_link only makes sense in pass mode and for 788 * regular files. Also note: if a link operation fails 789 * because of cross-device restrictions, we'll fall back 790 * to copy mode for that entry. 791 * 792 * TODO: Test other cpio implementations to see if they 793 * hard-link anything other than regular files here. 794 */ 795 if (cpio->option_link 796 && archive_entry_filetype(entry) == AE_IFREG) 797 { 798 struct archive_entry *t; 799 /* Save the original entry in case we need it later. */ 800 t = archive_entry_clone(entry); 801 if (t == NULL) 802 lafe_errc(1, ENOMEM, "Can't create link"); 803 /* Note: link(2) doesn't create parent directories, 804 * so we use archive_write_header() instead as a 805 * convenience. */ 806 archive_entry_set_hardlink(t, srcpath); 807 /* This is a straight link that carries no data. */ 808 archive_entry_set_size(t, 0); 809 r = archive_write_header(cpio->archive, t); 810 archive_entry_free(t); 811 if (r != ARCHIVE_OK) 812 lafe_warnc(archive_errno(cpio->archive), 813 "%s", archive_error_string(cpio->archive)); 814 if (r == ARCHIVE_FATAL) 815 exit(1); 816#ifdef EXDEV 817 if (r != ARCHIVE_OK && archive_errno(cpio->archive) == EXDEV) { 818 /* Cross-device link: Just fall through and use 819 * the original entry to copy the file over. */ 820 lafe_warnc(0, "Copying file instead"); 821 } else 822#endif 823 return (0); 824 } 825 826 /* 827 * Make sure we can open the file (if necessary) before 828 * trying to write the header. 829 */ 830 if (archive_entry_filetype(entry) == AE_IFREG) { 831 if (archive_entry_size(entry) > 0) { 832 fd = open(srcpath, O_RDONLY | O_BINARY); 833 if (fd < 0) { 834 lafe_warnc(errno, 835 "%s: could not open file", srcpath); 836 goto cleanup; 837 } 838 } 839 } else { 840 archive_entry_set_size(entry, 0); 841 } 842 843 r = archive_write_header(cpio->archive, entry); 844 845 if (r != ARCHIVE_OK) 846 lafe_warnc(archive_errno(cpio->archive), 847 "%s: %s", 848 srcpath, 849 archive_error_string(cpio->archive)); 850 851 if (r == ARCHIVE_FATAL) 852 exit(1); 853 854 if (r >= ARCHIVE_WARN && archive_entry_size(entry) > 0 && fd >= 0) { 855 bytes_read = read(fd, cpio->buff, (unsigned)cpio->buff_size); 856 while (bytes_read > 0) { 857 ssize_t bytes_write; 858 bytes_write = archive_write_data(cpio->archive, 859 cpio->buff, bytes_read); 860 if (bytes_write < 0) 861 lafe_errc(1, archive_errno(cpio->archive), 862 "%s", archive_error_string(cpio->archive)); 863 if (bytes_write < bytes_read) { 864 lafe_warnc(0, 865 "Truncated write; file may have " 866 "grown while being archived."); 867 } 868 bytes_read = read(fd, cpio->buff, 869 (unsigned)cpio->buff_size); 870 } 871 } 872 873 fd = restore_time(cpio, entry, srcpath, fd); 874 875cleanup: 876 if (cpio->verbose) 877 fprintf(stderr,"\n"); 878 if (fd >= 0) 879 close(fd); 880 return (0); 881} 882 883static int 884restore_time(struct cpio *cpio, struct archive_entry *entry, 885 const char *name, int fd) 886{ 887#ifndef HAVE_UTIMES 888 static int warned = 0; 889 890 (void)cpio; /* UNUSED */ 891 (void)entry; /* UNUSED */ 892 (void)name; /* UNUSED */ 893 894 if (!warned) 895 lafe_warnc(0, "Can't restore access times on this platform"); 896 warned = 1; 897 return (fd); 898#else 899#if defined(_WIN32) && !defined(__CYGWIN__) 900 struct __timeval times[2]; 901#else 902 struct timeval times[2]; 903#endif 904 905 if (!cpio->option_atime_restore) 906 return (fd); 907 908 times[1].tv_sec = archive_entry_mtime(entry); 909 times[1].tv_usec = archive_entry_mtime_nsec(entry) / 1000; 910 911 times[0].tv_sec = archive_entry_atime(entry); 912 times[0].tv_usec = archive_entry_atime_nsec(entry) / 1000; 913 914#if defined(HAVE_FUTIMES) && !defined(__CYGWIN__) 915 if (fd >= 0 && futimes(fd, times) == 0) 916 return (fd); 917#endif 918 /* 919 * Some platform cannot restore access times if the file descriptor 920 * is still opened. 921 */ 922 if (fd >= 0) { 923 close(fd); 924 fd = -1; 925 } 926 927#ifdef HAVE_LUTIMES 928 if (lutimes(name, times) != 0) 929#else 930 if ((AE_IFLNK != archive_entry_filetype(entry)) 931 && utimes(name, times) != 0) 932#endif 933 lafe_warnc(errno, "Can't update time for %s", name); 934#endif 935 return (fd); 936} 937 938 939static void 940mode_in(struct cpio *cpio) 941{ 942 struct archive *a; 943 struct archive_entry *entry; 944 struct archive *ext; 945 const char *destpath; 946 int r; 947 948 ext = archive_write_disk_new(); 949 if (ext == NULL) 950 lafe_errc(1, 0, "Couldn't allocate restore object"); 951 r = archive_write_disk_set_options(ext, cpio->extract_flags); 952 if (r != ARCHIVE_OK) 953 lafe_errc(1, 0, "%s", archive_error_string(ext)); 954 a = archive_read_new(); 955 if (a == NULL) 956 lafe_errc(1, 0, "Couldn't allocate archive object"); 957 archive_read_support_filter_all(a); 958 archive_read_support_format_all(a); 959 if (cpio->passphrase != NULL) 960 r = archive_read_add_passphrase(a, cpio->passphrase); 961 else 962 r = archive_read_set_passphrase_callback(a, cpio, 963 &passphrase_callback); 964 if (r != ARCHIVE_OK) 965 lafe_errc(1, 0, "%s", archive_error_string(a)); 966 967 if (archive_read_open_filename(a, cpio->filename, 968 cpio->bytes_per_block)) 969 lafe_errc(1, archive_errno(a), 970 "%s", archive_error_string(a)); 971 for (;;) { 972 r = archive_read_next_header(a, &entry); 973 if (r == ARCHIVE_EOF) 974 break; 975 if (r != ARCHIVE_OK) { 976 lafe_errc(1, archive_errno(a), 977 "%s", archive_error_string(a)); 978 } 979 if (archive_match_path_excluded(cpio->matching, entry)) 980 continue; 981 if (cpio->option_rename) { 982 destpath = cpio_rename(archive_entry_pathname(entry)); 983 archive_entry_set_pathname(entry, destpath); 984 } else 985 destpath = archive_entry_pathname(entry); 986 if (destpath == NULL) 987 continue; 988 if (cpio->verbose) 989 fprintf(stderr, "%s\n", destpath); 990 if (cpio->dot) 991 fprintf(stderr, "."); 992 if (cpio->uid_override >= 0) 993 archive_entry_set_uid(entry, cpio->uid_override); 994 if (cpio->gid_override >= 0) 995 archive_entry_set_gid(entry, cpio->gid_override); 996 r = archive_write_header(ext, entry); 997 if (r != ARCHIVE_OK) { 998 fprintf(stderr, "%s: %s\n", 999 archive_entry_pathname(entry), 1000 archive_error_string(ext)); 1001 } else if (!archive_entry_size_is_set(entry) 1002 || archive_entry_size(entry) > 0) { 1003 r = extract_data(a, ext); 1004 if (r != ARCHIVE_OK) 1005 cpio->return_value = 1; 1006 } 1007 } 1008 r = archive_read_close(a); 1009 if (cpio->dot) 1010 fprintf(stderr, "\n"); 1011 if (r != ARCHIVE_OK) 1012 lafe_errc(1, 0, "%s", archive_error_string(a)); 1013 r = archive_write_close(ext); 1014 if (r != ARCHIVE_OK) 1015 lafe_errc(1, 0, "%s", archive_error_string(ext)); 1016 if (!cpio->quiet) { 1017 int64_t blocks = (archive_filter_bytes(a, 0) + 511) 1018 / 512; 1019 fprintf(stderr, "%lu %s\n", (unsigned long)blocks, 1020 blocks == 1 ? "block" : "blocks"); 1021 } 1022 archive_read_free(a); 1023 archive_write_free(ext); 1024 exit(cpio->return_value); 1025} 1026 1027/* 1028 * Exits if there's a fatal error. Returns ARCHIVE_OK 1029 * if everything is kosher. 1030 */ 1031static int 1032extract_data(struct archive *ar, struct archive *aw) 1033{ 1034 int r; 1035 size_t size; 1036 const void *block; 1037 int64_t offset; 1038 1039 for (;;) { 1040 r = archive_read_data_block(ar, &block, &size, &offset); 1041 if (r == ARCHIVE_EOF) 1042 return (ARCHIVE_OK); 1043 if (r != ARCHIVE_OK) { 1044 lafe_warnc(archive_errno(ar), 1045 "%s", archive_error_string(ar)); 1046 exit(1); 1047 } 1048 r = (int)archive_write_data_block(aw, block, size, offset); 1049 if (r != ARCHIVE_OK) { 1050 lafe_warnc(archive_errno(aw), 1051 "%s", archive_error_string(aw)); 1052 return (r); 1053 } 1054 } 1055} 1056 1057static void 1058mode_list(struct cpio *cpio) 1059{ 1060 struct archive *a; 1061 struct archive_entry *entry; 1062 int r; 1063 1064 a = archive_read_new(); 1065 if (a == NULL) 1066 lafe_errc(1, 0, "Couldn't allocate archive object"); 1067 archive_read_support_filter_all(a); 1068 archive_read_support_format_all(a); 1069 if (cpio->passphrase != NULL) 1070 r = archive_read_add_passphrase(a, cpio->passphrase); 1071 else 1072 r = archive_read_set_passphrase_callback(a, cpio, 1073 &passphrase_callback); 1074 if (r != ARCHIVE_OK) 1075 lafe_errc(1, 0, "%s", archive_error_string(a)); 1076 1077 if (archive_read_open_filename(a, cpio->filename, 1078 cpio->bytes_per_block)) 1079 lafe_errc(1, archive_errno(a), 1080 "%s", archive_error_string(a)); 1081 for (;;) { 1082 r = archive_read_next_header(a, &entry); 1083 if (r == ARCHIVE_EOF) 1084 break; 1085 if (r != ARCHIVE_OK) { 1086 lafe_errc(1, archive_errno(a), 1087 "%s", archive_error_string(a)); 1088 } 1089 if (archive_match_path_excluded(cpio->matching, entry)) 1090 continue; 1091 if (cpio->verbose) 1092 list_item_verbose(cpio, entry); 1093 else 1094 fprintf(stdout, "%s\n", archive_entry_pathname(entry)); 1095 } 1096 r = archive_read_close(a); 1097 if (r != ARCHIVE_OK) 1098 lafe_errc(1, 0, "%s", archive_error_string(a)); 1099 if (!cpio->quiet) { 1100 int64_t blocks = (archive_filter_bytes(a, 0) + 511) 1101 / 512; 1102 fprintf(stderr, "%lu %s\n", (unsigned long)blocks, 1103 blocks == 1 ? "block" : "blocks"); 1104 } 1105 archive_read_free(a); 1106 exit(0); 1107} 1108 1109/* 1110 * Display information about the current file. 1111 * 1112 * The format here roughly duplicates the output of 'ls -l'. 1113 * This is based on SUSv2, where 'tar tv' is documented as 1114 * listing additional information in an "unspecified format," 1115 * and 'pax -l' is documented as using the same format as 'ls -l'. 1116 */ 1117static void 1118list_item_verbose(struct cpio *cpio, struct archive_entry *entry) 1119{ 1120 char size[32]; 1121 char date[32]; 1122 char uids[16], gids[16]; 1123 const char *uname, *gname; 1124 FILE *out = stdout; 1125 const char *fmt; 1126 time_t mtime; 1127 static time_t now; 1128 1129 if (!now) 1130 time(&now); 1131 1132 if (cpio->option_numeric_uid_gid) { 1133 /* Format numeric uid/gid for display. */ 1134 strcpy(uids, cpio_i64toa(archive_entry_uid(entry))); 1135 uname = uids; 1136 strcpy(gids, cpio_i64toa(archive_entry_gid(entry))); 1137 gname = gids; 1138 } else { 1139 /* Use uname if it's present, else lookup name from uid. */ 1140 uname = archive_entry_uname(entry); 1141 if (uname == NULL) 1142 uname = lookup_uname(cpio, (uid_t)archive_entry_uid(entry)); 1143 /* Use gname if it's present, else lookup name from gid. */ 1144 gname = archive_entry_gname(entry); 1145 if (gname == NULL) 1146 gname = lookup_gname(cpio, (uid_t)archive_entry_gid(entry)); 1147 } 1148 1149 /* Print device number or file size. */ 1150 if (archive_entry_filetype(entry) == AE_IFCHR 1151 || archive_entry_filetype(entry) == AE_IFBLK) { 1152 snprintf(size, sizeof(size), "%lu,%lu", 1153 (unsigned long)archive_entry_rdevmajor(entry), 1154 (unsigned long)archive_entry_rdevminor(entry)); 1155 } else { 1156 strcpy(size, cpio_i64toa(archive_entry_size(entry))); 1157 } 1158 1159 /* Format the time using 'ls -l' conventions. */ 1160 mtime = archive_entry_mtime(entry); 1161#if defined(_WIN32) && !defined(__CYGWIN__) 1162 /* Windows' strftime function does not support %e format. */ 1163 if (mtime - now > 365*86400/2 1164 || mtime - now < -365*86400/2) 1165 fmt = cpio->day_first ? "%d %b %Y" : "%b %d %Y"; 1166 else 1167 fmt = cpio->day_first ? "%d %b %H:%M" : "%b %d %H:%M"; 1168#else 1169 if (mtime - now > 365*86400/2 1170 || mtime - now < -365*86400/2) 1171 fmt = cpio->day_first ? "%e %b %Y" : "%b %e %Y"; 1172 else 1173 fmt = cpio->day_first ? "%e %b %H:%M" : "%b %e %H:%M"; 1174#endif 1175 strftime(date, sizeof(date), fmt, localtime(&mtime)); 1176 1177 fprintf(out, "%s%3d %-8s %-8s %8s %12s %s", 1178 archive_entry_strmode(entry), 1179 archive_entry_nlink(entry), 1180 uname, gname, size, date, 1181 archive_entry_pathname(entry)); 1182 1183 /* Extra information for links. */ 1184 if (archive_entry_hardlink(entry)) /* Hard link */ 1185 fprintf(out, " link to %s", archive_entry_hardlink(entry)); 1186 else if (archive_entry_symlink(entry)) /* Symbolic link */ 1187 fprintf(out, " -> %s", archive_entry_symlink(entry)); 1188 fprintf(out, "\n"); 1189} 1190 1191static void 1192mode_pass(struct cpio *cpio, const char *destdir) 1193{ 1194 struct lafe_line_reader *lr; 1195 const char *p; 1196 int r; 1197 1198 /* Ensure target dir has a trailing '/' to simplify path surgery. */ 1199 cpio->destdir = malloc(strlen(destdir) + 8); 1200 strcpy(cpio->destdir, destdir); 1201 if (destdir[strlen(destdir) - 1] != '/') 1202 strcat(cpio->destdir, "/"); 1203 1204 cpio->archive = archive_write_disk_new(); 1205 if (cpio->archive == NULL) 1206 lafe_errc(1, 0, "Failed to allocate archive object"); 1207 r = archive_write_disk_set_options(cpio->archive, cpio->extract_flags); 1208 if (r != ARCHIVE_OK) 1209 lafe_errc(1, 0, "%s", archive_error_string(cpio->archive)); 1210 cpio->linkresolver = archive_entry_linkresolver_new(); 1211 archive_write_disk_set_standard_lookup(cpio->archive); 1212 1213 cpio->archive_read_disk = archive_read_disk_new(); 1214 if (cpio->archive_read_disk == NULL) 1215 lafe_errc(1, 0, "Failed to allocate archive object"); 1216 if (cpio->option_follow_links) 1217 archive_read_disk_set_symlink_logical(cpio->archive_read_disk); 1218 else 1219 archive_read_disk_set_symlink_physical(cpio->archive_read_disk); 1220 archive_read_disk_set_standard_lookup(cpio->archive_read_disk); 1221 1222 lr = lafe_line_reader("-", cpio->option_null); 1223 while ((p = lafe_line_reader_next(lr)) != NULL) 1224 file_to_archive(cpio, p); 1225 lafe_line_reader_free(lr); 1226 1227 archive_entry_linkresolver_free(cpio->linkresolver); 1228 r = archive_write_close(cpio->archive); 1229 if (cpio->dot) 1230 fprintf(stderr, "\n"); 1231 if (r != ARCHIVE_OK) 1232 lafe_errc(1, 0, "%s", archive_error_string(cpio->archive)); 1233 1234 if (!cpio->quiet) { 1235 int64_t blocks = 1236 (archive_filter_bytes(cpio->archive, 0) + 511) 1237 / 512; 1238 fprintf(stderr, "%lu %s\n", (unsigned long)blocks, 1239 blocks == 1 ? "block" : "blocks"); 1240 } 1241 1242 archive_write_free(cpio->archive); 1243} 1244 1245/* 1246 * Prompt for a new name for this entry. Returns a pointer to the 1247 * new name or NULL if the entry should not be copied. This 1248 * implements the semantics defined in POSIX.1-1996, which specifies 1249 * that an input of '.' means the name should be unchanged. GNU cpio 1250 * treats '.' as a literal new name. 1251 */ 1252static const char * 1253cpio_rename(const char *name) 1254{ 1255 static char buff[1024]; 1256 FILE *t; 1257 char *p, *ret; 1258#if defined(_WIN32) && !defined(__CYGWIN__) 1259 FILE *to; 1260 1261 t = fopen("CONIN$", "r"); 1262 if (t == NULL) 1263 return (name); 1264 to = fopen("CONOUT$", "w"); 1265 if (to == NULL) { 1266 fclose(t); 1267 return (name); 1268 } 1269 fprintf(to, "%s (Enter/./(new name))? ", name); 1270 fclose(to); 1271#else 1272 t = fopen("/dev/tty", "r+"); 1273 if (t == NULL) 1274 return (name); 1275 fprintf(t, "%s (Enter/./(new name))? ", name); 1276 fflush(t); 1277#endif 1278 1279 p = fgets(buff, sizeof(buff), t); 1280 fclose(t); 1281 if (p == NULL) 1282 /* End-of-file is a blank line. */ 1283 return (NULL); 1284 1285 while (*p == ' ' || *p == '\t') 1286 ++p; 1287 if (*p == '\n' || *p == '\0') 1288 /* Empty line. */ 1289 return (NULL); 1290 if (*p == '.' && p[1] == '\n') 1291 /* Single period preserves original name. */ 1292 return (name); 1293 ret = p; 1294 /* Trim the final newline. */ 1295 while (*p != '\0' && *p != '\n') 1296 ++p; 1297 /* Overwrite the final \n with a null character. */ 1298 *p = '\0'; 1299 return (ret); 1300} 1301 1302static void 1303free_cache(struct name_cache *cache) 1304{ 1305 size_t i; 1306 1307 if (cache != NULL) { 1308 for (i = 0; i < cache->size; i++) 1309 free(cache->cache[i].name); 1310 free(cache); 1311 } 1312} 1313 1314/* 1315 * Lookup uname/gname from uid/gid, return NULL if no match. 1316 */ 1317static const char * 1318lookup_name(struct cpio *cpio, struct name_cache **name_cache_variable, 1319 int (*lookup_fn)(struct cpio *, const char **, id_t), id_t id) 1320{ 1321 char asnum[16]; 1322 struct name_cache *cache; 1323 const char *name; 1324 int slot; 1325 1326 1327 if (*name_cache_variable == NULL) { 1328 *name_cache_variable = calloc(1, sizeof(struct name_cache)); 1329 if (*name_cache_variable == NULL) 1330 lafe_errc(1, ENOMEM, "No more memory"); 1331 (*name_cache_variable)->size = name_cache_size; 1332 } 1333 1334 cache = *name_cache_variable; 1335 cache->probes++; 1336 1337 slot = id % cache->size; 1338 if (cache->cache[slot].name != NULL) { 1339 if (cache->cache[slot].id == id) { 1340 cache->hits++; 1341 return (cache->cache[slot].name); 1342 } 1343 free(cache->cache[slot].name); 1344 cache->cache[slot].name = NULL; 1345 } 1346 1347 if (lookup_fn(cpio, &name, id) == 0) { 1348 if (name == NULL || name[0] == '\0') { 1349 /* If lookup failed, format it as a number. */ 1350 snprintf(asnum, sizeof(asnum), "%u", (unsigned)id); 1351 name = asnum; 1352 } 1353 cache->cache[slot].name = strdup(name); 1354 if (cache->cache[slot].name != NULL) { 1355 cache->cache[slot].id = id; 1356 return (cache->cache[slot].name); 1357 } 1358 /* 1359 * Conveniently, NULL marks an empty slot, so 1360 * if the strdup() fails, we've just failed to 1361 * cache it. No recovery necessary. 1362 */ 1363 } 1364 return (NULL); 1365} 1366 1367static const char * 1368lookup_uname(struct cpio *cpio, uid_t uid) 1369{ 1370 return (lookup_name(cpio, &cpio->uname_cache, 1371 &lookup_uname_helper, (id_t)uid)); 1372} 1373 1374static int 1375lookup_uname_helper(struct cpio *cpio, const char **name, id_t id) 1376{ 1377 struct passwd *pwent; 1378 1379 (void)cpio; /* UNUSED */ 1380 1381 errno = 0; 1382 pwent = getpwuid((uid_t)id); 1383 if (pwent == NULL) { 1384 *name = NULL; 1385 if (errno != 0 && errno != ENOENT) 1386 lafe_warnc(errno, "getpwuid(%s) failed", 1387 cpio_i64toa((int64_t)id)); 1388 return (errno); 1389 } 1390 1391 *name = pwent->pw_name; 1392 return (0); 1393} 1394 1395static const char * 1396lookup_gname(struct cpio *cpio, gid_t gid) 1397{ 1398 return (lookup_name(cpio, &cpio->gname_cache, 1399 &lookup_gname_helper, (id_t)gid)); 1400} 1401 1402static int 1403lookup_gname_helper(struct cpio *cpio, const char **name, id_t id) 1404{ 1405 struct group *grent; 1406 1407 (void)cpio; /* UNUSED */ 1408 1409 errno = 0; 1410 grent = getgrgid((gid_t)id); 1411 if (grent == NULL) { 1412 *name = NULL; 1413 if (errno != 0) 1414 lafe_warnc(errno, "getgrgid(%s) failed", 1415 cpio_i64toa((int64_t)id)); 1416 return (errno); 1417 } 1418 1419 *name = grent->gr_name; 1420 return (0); 1421} 1422 1423/* 1424 * It would be nice to just use printf() for formatting large numbers, 1425 * but the compatibility problems are a big headache. Hence the 1426 * following simple utility function. 1427 */ 1428const char * 1429cpio_i64toa(int64_t n0) 1430{ 1431 /* 2^64 =~ 1.8 * 10^19, so 20 decimal digits suffice. 1432 * We also need 1 byte for '-' and 1 for '\0'. 1433 */ 1434 static char buff[22]; 1435 int64_t n = n0 < 0 ? -n0 : n0; 1436 char *p = buff + sizeof(buff); 1437 1438 *--p = '\0'; 1439 do { 1440 *--p = '0' + (int)(n % 10); 1441 n /= 10; 1442 } while (n > 0); 1443 if (n0 < 0) 1444 *--p = '-'; 1445 return p; 1446} 1447 1448#define PPBUFF_SIZE 1024 1449static const char * 1450passphrase_callback(struct archive *a, void *_client_data) 1451{ 1452 struct cpio *cpio = (struct cpio *)_client_data; 1453 (void)a; /* UNUSED */ 1454 1455 if (cpio->ppbuff == NULL) { 1456 cpio->ppbuff = malloc(PPBUFF_SIZE); 1457 if (cpio->ppbuff == NULL) 1458 lafe_errc(1, errno, "Out of memory"); 1459 } 1460 return lafe_readpassphrase("Enter passphrase:", 1461 cpio->ppbuff, PPBUFF_SIZE); 1462} 1463 1464static void 1465passphrase_free(char *ppbuff) 1466{ 1467 if (ppbuff != NULL) { 1468 memset(ppbuff, 0, PPBUFF_SIZE); 1469 free(ppbuff); 1470 } 1471} 1472