cpio.c revision 318482
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 318482 2017-05-18 19:47:43Z 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 archive_entry_linkresolver_free(cpio->linkresolver); 632} 633 634static const char * 635remove_leading_slash(const char *p) 636{ 637 const char *rp; 638 639 /* Remove leading "//./" or "//?/" or "//?/UNC/" 640 * (absolute path prefixes used by Windows API) */ 641 if ((p[0] == '/' || p[0] == '\\') && 642 (p[1] == '/' || p[1] == '\\') && 643 (p[2] == '.' || p[2] == '?') && 644 (p[3] == '/' || p[3] == '\\')) 645 { 646 if (p[2] == '?' && 647 (p[4] == 'U' || p[4] == 'u') && 648 (p[5] == 'N' || p[5] == 'n') && 649 (p[6] == 'C' || p[6] == 'c') && 650 (p[7] == '/' || p[7] == '\\')) 651 p += 8; 652 else 653 p += 4; 654 } 655 do { 656 rp = p; 657 /* Remove leading drive letter from archives created 658 * on Windows. */ 659 if (((p[0] >= 'a' && p[0] <= 'z') || 660 (p[0] >= 'A' && p[0] <= 'Z')) && 661 p[1] == ':') { 662 p += 2; 663 } 664 /* Remove leading "/../", "//", etc. */ 665 while (p[0] == '/' || p[0] == '\\') { 666 if (p[1] == '.' && p[2] == '.' && 667 (p[3] == '/' || p[3] == '\\')) { 668 p += 3; /* Remove "/..", leave "/" 669 * for next pass. */ 670 } else 671 p += 1; /* Remove "/". */ 672 } 673 } while (rp != p); 674 return (p); 675} 676 677/* 678 * This is used by both out mode (to copy objects from disk into 679 * an archive) and pass mode (to copy objects from disk to 680 * an archive_write_disk "archive"). 681 */ 682static int 683file_to_archive(struct cpio *cpio, const char *srcpath) 684{ 685 const char *destpath; 686 struct archive_entry *entry, *spare; 687 size_t len; 688 int r; 689 690 /* 691 * Create an archive_entry describing the source file. 692 * 693 */ 694 entry = archive_entry_new(); 695 if (entry == NULL) 696 lafe_errc(1, 0, "Couldn't allocate entry"); 697 archive_entry_copy_sourcepath(entry, srcpath); 698 r = archive_read_disk_entry_from_file(cpio->archive_read_disk, 699 entry, -1, NULL); 700 if (r < ARCHIVE_FAILED) 701 lafe_errc(1, 0, "%s", 702 archive_error_string(cpio->archive_read_disk)); 703 if (r < ARCHIVE_OK) 704 lafe_warnc(0, "%s", 705 archive_error_string(cpio->archive_read_disk)); 706 if (r <= ARCHIVE_FAILED) { 707 archive_entry_free(entry); 708 cpio->return_value = 1; 709 return (r); 710 } 711 712 if (cpio->uid_override >= 0) { 713 archive_entry_set_uid(entry, cpio->uid_override); 714 archive_entry_set_uname(entry, cpio->uname_override); 715 } 716 if (cpio->gid_override >= 0) { 717 archive_entry_set_gid(entry, cpio->gid_override); 718 archive_entry_set_gname(entry, cpio->gname_override); 719 } 720 721 /* 722 * Generate a destination path for this entry. 723 * "destination path" is the name to which it will be copied in 724 * pass mode or the name that will go into the archive in 725 * output mode. 726 */ 727 destpath = srcpath; 728 if (cpio->destdir) { 729 len = strlen(cpio->destdir) + strlen(srcpath) + 8; 730 if (len >= cpio->pass_destpath_alloc) { 731 while (len >= cpio->pass_destpath_alloc) { 732 cpio->pass_destpath_alloc += 512; 733 cpio->pass_destpath_alloc *= 2; 734 } 735 free(cpio->pass_destpath); 736 cpio->pass_destpath = malloc(cpio->pass_destpath_alloc); 737 if (cpio->pass_destpath == NULL) 738 lafe_errc(1, ENOMEM, 739 "Can't allocate path buffer"); 740 } 741 strcpy(cpio->pass_destpath, cpio->destdir); 742 strcat(cpio->pass_destpath, remove_leading_slash(srcpath)); 743 destpath = cpio->pass_destpath; 744 } 745 if (cpio->option_rename) 746 destpath = cpio_rename(destpath); 747 if (destpath == NULL) 748 return (0); 749 archive_entry_copy_pathname(entry, destpath); 750 751 /* 752 * If we're trying to preserve hardlinks, match them here. 753 */ 754 spare = NULL; 755 if (cpio->linkresolver != NULL 756 && archive_entry_filetype(entry) != AE_IFDIR) { 757 archive_entry_linkify(cpio->linkresolver, &entry, &spare); 758 } 759 760 if (entry != NULL) { 761 r = entry_to_archive(cpio, entry); 762 archive_entry_free(entry); 763 if (spare != NULL) { 764 if (r == 0) 765 r = entry_to_archive(cpio, spare); 766 archive_entry_free(spare); 767 } 768 } 769 return (r); 770} 771 772static int 773entry_to_archive(struct cpio *cpio, struct archive_entry *entry) 774{ 775 const char *destpath = archive_entry_pathname(entry); 776 const char *srcpath = archive_entry_sourcepath(entry); 777 int fd = -1; 778 ssize_t bytes_read; 779 int r; 780 781 /* Print out the destination name to the user. */ 782 if (cpio->verbose) 783 fprintf(stderr,"%s", destpath); 784 if (cpio->dot) 785 fprintf(stderr, "."); 786 787 /* 788 * Option_link only makes sense in pass mode and for 789 * regular files. Also note: if a link operation fails 790 * because of cross-device restrictions, we'll fall back 791 * to copy mode for that entry. 792 * 793 * TODO: Test other cpio implementations to see if they 794 * hard-link anything other than regular files here. 795 */ 796 if (cpio->option_link 797 && archive_entry_filetype(entry) == AE_IFREG) 798 { 799 struct archive_entry *t; 800 /* Save the original entry in case we need it later. */ 801 t = archive_entry_clone(entry); 802 if (t == NULL) 803 lafe_errc(1, ENOMEM, "Can't create link"); 804 /* Note: link(2) doesn't create parent directories, 805 * so we use archive_write_header() instead as a 806 * convenience. */ 807 archive_entry_set_hardlink(t, srcpath); 808 /* This is a straight link that carries no data. */ 809 archive_entry_set_size(t, 0); 810 r = archive_write_header(cpio->archive, t); 811 archive_entry_free(t); 812 if (r != ARCHIVE_OK) 813 lafe_warnc(archive_errno(cpio->archive), 814 "%s", archive_error_string(cpio->archive)); 815 if (r == ARCHIVE_FATAL) 816 exit(1); 817#ifdef EXDEV 818 if (r != ARCHIVE_OK && archive_errno(cpio->archive) == EXDEV) { 819 /* Cross-device link: Just fall through and use 820 * the original entry to copy the file over. */ 821 lafe_warnc(0, "Copying file instead"); 822 } else 823#endif 824 return (0); 825 } 826 827 /* 828 * Make sure we can open the file (if necessary) before 829 * trying to write the header. 830 */ 831 if (archive_entry_filetype(entry) == AE_IFREG) { 832 if (archive_entry_size(entry) > 0) { 833 fd = open(srcpath, O_RDONLY | O_BINARY); 834 if (fd < 0) { 835 lafe_warnc(errno, 836 "%s: could not open file", srcpath); 837 goto cleanup; 838 } 839 } 840 } else { 841 archive_entry_set_size(entry, 0); 842 } 843 844 r = archive_write_header(cpio->archive, entry); 845 846 if (r != ARCHIVE_OK) 847 lafe_warnc(archive_errno(cpio->archive), 848 "%s: %s", 849 srcpath, 850 archive_error_string(cpio->archive)); 851 852 if (r == ARCHIVE_FATAL) 853 exit(1); 854 855 if (r >= ARCHIVE_WARN && archive_entry_size(entry) > 0 && fd >= 0) { 856 bytes_read = read(fd, cpio->buff, (unsigned)cpio->buff_size); 857 while (bytes_read > 0) { 858 ssize_t bytes_write; 859 bytes_write = archive_write_data(cpio->archive, 860 cpio->buff, bytes_read); 861 if (bytes_write < 0) 862 lafe_errc(1, archive_errno(cpio->archive), 863 "%s", archive_error_string(cpio->archive)); 864 if (bytes_write < bytes_read) { 865 lafe_warnc(0, 866 "Truncated write; file may have " 867 "grown while being archived."); 868 } 869 bytes_read = read(fd, cpio->buff, 870 (unsigned)cpio->buff_size); 871 } 872 } 873 874 fd = restore_time(cpio, entry, srcpath, fd); 875 876cleanup: 877 if (cpio->verbose) 878 fprintf(stderr,"\n"); 879 if (fd >= 0) 880 close(fd); 881 return (0); 882} 883 884static int 885restore_time(struct cpio *cpio, struct archive_entry *entry, 886 const char *name, int fd) 887{ 888#ifndef HAVE_UTIMES 889 static int warned = 0; 890 891 (void)cpio; /* UNUSED */ 892 (void)entry; /* UNUSED */ 893 (void)name; /* UNUSED */ 894 895 if (!warned) 896 lafe_warnc(0, "Can't restore access times on this platform"); 897 warned = 1; 898 return (fd); 899#else 900#if defined(_WIN32) && !defined(__CYGWIN__) 901 struct __timeval times[2]; 902#else 903 struct timeval times[2]; 904#endif 905 906 if (!cpio->option_atime_restore) 907 return (fd); 908 909 times[1].tv_sec = archive_entry_mtime(entry); 910 times[1].tv_usec = archive_entry_mtime_nsec(entry) / 1000; 911 912 times[0].tv_sec = archive_entry_atime(entry); 913 times[0].tv_usec = archive_entry_atime_nsec(entry) / 1000; 914 915#if defined(HAVE_FUTIMES) && !defined(__CYGWIN__) 916 if (fd >= 0 && futimes(fd, times) == 0) 917 return (fd); 918#endif 919 /* 920 * Some platform cannot restore access times if the file descriptor 921 * is still opened. 922 */ 923 if (fd >= 0) { 924 close(fd); 925 fd = -1; 926 } 927 928#ifdef HAVE_LUTIMES 929 if (lutimes(name, times) != 0) 930#else 931 if ((AE_IFLNK != archive_entry_filetype(entry)) 932 && utimes(name, times) != 0) 933#endif 934 lafe_warnc(errno, "Can't update time for %s", name); 935#endif 936 return (fd); 937} 938 939 940static void 941mode_in(struct cpio *cpio) 942{ 943 struct archive *a; 944 struct archive_entry *entry; 945 struct archive *ext; 946 const char *destpath; 947 int r; 948 949 ext = archive_write_disk_new(); 950 if (ext == NULL) 951 lafe_errc(1, 0, "Couldn't allocate restore object"); 952 r = archive_write_disk_set_options(ext, cpio->extract_flags); 953 if (r != ARCHIVE_OK) 954 lafe_errc(1, 0, "%s", archive_error_string(ext)); 955 a = archive_read_new(); 956 if (a == NULL) 957 lafe_errc(1, 0, "Couldn't allocate archive object"); 958 archive_read_support_filter_all(a); 959 archive_read_support_format_all(a); 960 if (cpio->passphrase != NULL) 961 r = archive_read_add_passphrase(a, cpio->passphrase); 962 else 963 r = archive_read_set_passphrase_callback(a, cpio, 964 &passphrase_callback); 965 if (r != ARCHIVE_OK) 966 lafe_errc(1, 0, "%s", archive_error_string(a)); 967 968 if (archive_read_open_filename(a, cpio->filename, 969 cpio->bytes_per_block)) 970 lafe_errc(1, archive_errno(a), 971 "%s", archive_error_string(a)); 972 for (;;) { 973 r = archive_read_next_header(a, &entry); 974 if (r == ARCHIVE_EOF) 975 break; 976 if (r != ARCHIVE_OK) { 977 lafe_errc(1, archive_errno(a), 978 "%s", archive_error_string(a)); 979 } 980 if (archive_match_path_excluded(cpio->matching, entry)) 981 continue; 982 if (cpio->option_rename) { 983 destpath = cpio_rename(archive_entry_pathname(entry)); 984 archive_entry_set_pathname(entry, destpath); 985 } else 986 destpath = archive_entry_pathname(entry); 987 if (destpath == NULL) 988 continue; 989 if (cpio->verbose) 990 fprintf(stderr, "%s\n", destpath); 991 if (cpio->dot) 992 fprintf(stderr, "."); 993 if (cpio->uid_override >= 0) 994 archive_entry_set_uid(entry, cpio->uid_override); 995 if (cpio->gid_override >= 0) 996 archive_entry_set_gid(entry, cpio->gid_override); 997 r = archive_write_header(ext, entry); 998 if (r != ARCHIVE_OK) { 999 fprintf(stderr, "%s: %s\n", 1000 archive_entry_pathname(entry), 1001 archive_error_string(ext)); 1002 } else if (!archive_entry_size_is_set(entry) 1003 || archive_entry_size(entry) > 0) { 1004 r = extract_data(a, ext); 1005 if (r != ARCHIVE_OK) 1006 cpio->return_value = 1; 1007 } 1008 } 1009 r = archive_read_close(a); 1010 if (cpio->dot) 1011 fprintf(stderr, "\n"); 1012 if (r != ARCHIVE_OK) 1013 lafe_errc(1, 0, "%s", archive_error_string(a)); 1014 r = archive_write_close(ext); 1015 if (r != ARCHIVE_OK) 1016 lafe_errc(1, 0, "%s", archive_error_string(ext)); 1017 if (!cpio->quiet) { 1018 int64_t blocks = (archive_filter_bytes(a, 0) + 511) 1019 / 512; 1020 fprintf(stderr, "%lu %s\n", (unsigned long)blocks, 1021 blocks == 1 ? "block" : "blocks"); 1022 } 1023 archive_read_free(a); 1024 archive_write_free(ext); 1025 exit(cpio->return_value); 1026} 1027 1028/* 1029 * Exits if there's a fatal error. Returns ARCHIVE_OK 1030 * if everything is kosher. 1031 */ 1032static int 1033extract_data(struct archive *ar, struct archive *aw) 1034{ 1035 int r; 1036 size_t size; 1037 const void *block; 1038 int64_t offset; 1039 1040 for (;;) { 1041 r = archive_read_data_block(ar, &block, &size, &offset); 1042 if (r == ARCHIVE_EOF) 1043 return (ARCHIVE_OK); 1044 if (r != ARCHIVE_OK) { 1045 lafe_warnc(archive_errno(ar), 1046 "%s", archive_error_string(ar)); 1047 exit(1); 1048 } 1049 r = (int)archive_write_data_block(aw, block, size, offset); 1050 if (r != ARCHIVE_OK) { 1051 lafe_warnc(archive_errno(aw), 1052 "%s", archive_error_string(aw)); 1053 return (r); 1054 } 1055 } 1056} 1057 1058static void 1059mode_list(struct cpio *cpio) 1060{ 1061 struct archive *a; 1062 struct archive_entry *entry; 1063 int r; 1064 1065 a = archive_read_new(); 1066 if (a == NULL) 1067 lafe_errc(1, 0, "Couldn't allocate archive object"); 1068 archive_read_support_filter_all(a); 1069 archive_read_support_format_all(a); 1070 if (cpio->passphrase != NULL) 1071 r = archive_read_add_passphrase(a, cpio->passphrase); 1072 else 1073 r = archive_read_set_passphrase_callback(a, cpio, 1074 &passphrase_callback); 1075 if (r != ARCHIVE_OK) 1076 lafe_errc(1, 0, "%s", archive_error_string(a)); 1077 1078 if (archive_read_open_filename(a, cpio->filename, 1079 cpio->bytes_per_block)) 1080 lafe_errc(1, archive_errno(a), 1081 "%s", archive_error_string(a)); 1082 for (;;) { 1083 r = archive_read_next_header(a, &entry); 1084 if (r == ARCHIVE_EOF) 1085 break; 1086 if (r != ARCHIVE_OK) { 1087 lafe_errc(1, archive_errno(a), 1088 "%s", archive_error_string(a)); 1089 } 1090 if (archive_match_path_excluded(cpio->matching, entry)) 1091 continue; 1092 if (cpio->verbose) 1093 list_item_verbose(cpio, entry); 1094 else 1095 fprintf(stdout, "%s\n", archive_entry_pathname(entry)); 1096 } 1097 r = archive_read_close(a); 1098 if (r != ARCHIVE_OK) 1099 lafe_errc(1, 0, "%s", archive_error_string(a)); 1100 if (!cpio->quiet) { 1101 int64_t blocks = (archive_filter_bytes(a, 0) + 511) 1102 / 512; 1103 fprintf(stderr, "%lu %s\n", (unsigned long)blocks, 1104 blocks == 1 ? "block" : "blocks"); 1105 } 1106 archive_read_free(a); 1107 exit(0); 1108} 1109 1110/* 1111 * Display information about the current file. 1112 * 1113 * The format here roughly duplicates the output of 'ls -l'. 1114 * This is based on SUSv2, where 'tar tv' is documented as 1115 * listing additional information in an "unspecified format," 1116 * and 'pax -l' is documented as using the same format as 'ls -l'. 1117 */ 1118static void 1119list_item_verbose(struct cpio *cpio, struct archive_entry *entry) 1120{ 1121 char size[32]; 1122 char date[32]; 1123 char uids[16], gids[16]; 1124 const char *uname, *gname; 1125 FILE *out = stdout; 1126 const char *fmt; 1127 time_t mtime; 1128 static time_t now; 1129 1130 if (!now) 1131 time(&now); 1132 1133 if (cpio->option_numeric_uid_gid) { 1134 /* Format numeric uid/gid for display. */ 1135 strcpy(uids, cpio_i64toa(archive_entry_uid(entry))); 1136 uname = uids; 1137 strcpy(gids, cpio_i64toa(archive_entry_gid(entry))); 1138 gname = gids; 1139 } else { 1140 /* Use uname if it's present, else lookup name from uid. */ 1141 uname = archive_entry_uname(entry); 1142 if (uname == NULL) 1143 uname = lookup_uname(cpio, (uid_t)archive_entry_uid(entry)); 1144 /* Use gname if it's present, else lookup name from gid. */ 1145 gname = archive_entry_gname(entry); 1146 if (gname == NULL) 1147 gname = lookup_gname(cpio, (uid_t)archive_entry_gid(entry)); 1148 } 1149 1150 /* Print device number or file size. */ 1151 if (archive_entry_filetype(entry) == AE_IFCHR 1152 || archive_entry_filetype(entry) == AE_IFBLK) { 1153 snprintf(size, sizeof(size), "%lu,%lu", 1154 (unsigned long)archive_entry_rdevmajor(entry), 1155 (unsigned long)archive_entry_rdevminor(entry)); 1156 } else { 1157 strcpy(size, cpio_i64toa(archive_entry_size(entry))); 1158 } 1159 1160 /* Format the time using 'ls -l' conventions. */ 1161 mtime = archive_entry_mtime(entry); 1162#if defined(_WIN32) && !defined(__CYGWIN__) 1163 /* Windows' strftime function does not support %e format. */ 1164 if (mtime - now > 365*86400/2 1165 || mtime - now < -365*86400/2) 1166 fmt = cpio->day_first ? "%d %b %Y" : "%b %d %Y"; 1167 else 1168 fmt = cpio->day_first ? "%d %b %H:%M" : "%b %d %H:%M"; 1169#else 1170 if (mtime - now > 365*86400/2 1171 || mtime - now < -365*86400/2) 1172 fmt = cpio->day_first ? "%e %b %Y" : "%b %e %Y"; 1173 else 1174 fmt = cpio->day_first ? "%e %b %H:%M" : "%b %e %H:%M"; 1175#endif 1176 strftime(date, sizeof(date), fmt, localtime(&mtime)); 1177 1178 fprintf(out, "%s%3d %-8s %-8s %8s %12s %s", 1179 archive_entry_strmode(entry), 1180 archive_entry_nlink(entry), 1181 uname, gname, size, date, 1182 archive_entry_pathname(entry)); 1183 1184 /* Extra information for links. */ 1185 if (archive_entry_hardlink(entry)) /* Hard link */ 1186 fprintf(out, " link to %s", archive_entry_hardlink(entry)); 1187 else if (archive_entry_symlink(entry)) /* Symbolic link */ 1188 fprintf(out, " -> %s", archive_entry_symlink(entry)); 1189 fprintf(out, "\n"); 1190} 1191 1192static void 1193mode_pass(struct cpio *cpio, const char *destdir) 1194{ 1195 struct lafe_line_reader *lr; 1196 const char *p; 1197 int r; 1198 size_t destdir_len; 1199 1200 /* Ensure target dir has a trailing '/' to simplify path surgery. */ 1201 destdir_len = strlen(destdir); 1202 cpio->destdir = malloc(destdir_len + 8); 1203 memcpy(cpio->destdir, destdir, destdir_len); 1204 if (destdir_len == 0 || destdir[destdir_len - 1] != '/') 1205 cpio->destdir[destdir_len++] = '/'; 1206 cpio->destdir[destdir_len++] = '\0'; 1207 1208 cpio->archive = archive_write_disk_new(); 1209 if (cpio->archive == NULL) 1210 lafe_errc(1, 0, "Failed to allocate archive object"); 1211 r = archive_write_disk_set_options(cpio->archive, cpio->extract_flags); 1212 if (r != ARCHIVE_OK) 1213 lafe_errc(1, 0, "%s", archive_error_string(cpio->archive)); 1214 cpio->linkresolver = archive_entry_linkresolver_new(); 1215 archive_write_disk_set_standard_lookup(cpio->archive); 1216 1217 cpio->archive_read_disk = archive_read_disk_new(); 1218 if (cpio->archive_read_disk == NULL) 1219 lafe_errc(1, 0, "Failed to allocate archive object"); 1220 if (cpio->option_follow_links) 1221 archive_read_disk_set_symlink_logical(cpio->archive_read_disk); 1222 else 1223 archive_read_disk_set_symlink_physical(cpio->archive_read_disk); 1224 archive_read_disk_set_standard_lookup(cpio->archive_read_disk); 1225 1226 lr = lafe_line_reader("-", cpio->option_null); 1227 while ((p = lafe_line_reader_next(lr)) != NULL) 1228 file_to_archive(cpio, p); 1229 lafe_line_reader_free(lr); 1230 1231 archive_entry_linkresolver_free(cpio->linkresolver); 1232 r = archive_write_close(cpio->archive); 1233 if (cpio->dot) 1234 fprintf(stderr, "\n"); 1235 if (r != ARCHIVE_OK) 1236 lafe_errc(1, 0, "%s", archive_error_string(cpio->archive)); 1237 1238 if (!cpio->quiet) { 1239 int64_t blocks = 1240 (archive_filter_bytes(cpio->archive, 0) + 511) 1241 / 512; 1242 fprintf(stderr, "%lu %s\n", (unsigned long)blocks, 1243 blocks == 1 ? "block" : "blocks"); 1244 } 1245 1246 archive_write_free(cpio->archive); 1247 free(cpio->pass_destpath); 1248} 1249 1250/* 1251 * Prompt for a new name for this entry. Returns a pointer to the 1252 * new name or NULL if the entry should not be copied. This 1253 * implements the semantics defined in POSIX.1-1996, which specifies 1254 * that an input of '.' means the name should be unchanged. GNU cpio 1255 * treats '.' as a literal new name. 1256 */ 1257static const char * 1258cpio_rename(const char *name) 1259{ 1260 static char buff[1024]; 1261 FILE *t; 1262 char *p, *ret; 1263#if defined(_WIN32) && !defined(__CYGWIN__) 1264 FILE *to; 1265 1266 t = fopen("CONIN$", "r"); 1267 if (t == NULL) 1268 return (name); 1269 to = fopen("CONOUT$", "w"); 1270 if (to == NULL) { 1271 fclose(t); 1272 return (name); 1273 } 1274 fprintf(to, "%s (Enter/./(new name))? ", name); 1275 fclose(to); 1276#else 1277 t = fopen("/dev/tty", "r+"); 1278 if (t == NULL) 1279 return (name); 1280 fprintf(t, "%s (Enter/./(new name))? ", name); 1281 fflush(t); 1282#endif 1283 1284 p = fgets(buff, sizeof(buff), t); 1285 fclose(t); 1286 if (p == NULL) 1287 /* End-of-file is a blank line. */ 1288 return (NULL); 1289 1290 while (*p == ' ' || *p == '\t') 1291 ++p; 1292 if (*p == '\n' || *p == '\0') 1293 /* Empty line. */ 1294 return (NULL); 1295 if (*p == '.' && p[1] == '\n') 1296 /* Single period preserves original name. */ 1297 return (name); 1298 ret = p; 1299 /* Trim the final newline. */ 1300 while (*p != '\0' && *p != '\n') 1301 ++p; 1302 /* Overwrite the final \n with a null character. */ 1303 *p = '\0'; 1304 return (ret); 1305} 1306 1307static void 1308free_cache(struct name_cache *cache) 1309{ 1310 size_t i; 1311 1312 if (cache != NULL) { 1313 for (i = 0; i < cache->size; i++) 1314 free(cache->cache[i].name); 1315 free(cache); 1316 } 1317} 1318 1319/* 1320 * Lookup uname/gname from uid/gid, return NULL if no match. 1321 */ 1322static const char * 1323lookup_name(struct cpio *cpio, struct name_cache **name_cache_variable, 1324 int (*lookup_fn)(struct cpio *, const char **, id_t), id_t id) 1325{ 1326 char asnum[16]; 1327 struct name_cache *cache; 1328 const char *name; 1329 int slot; 1330 1331 1332 if (*name_cache_variable == NULL) { 1333 *name_cache_variable = calloc(1, sizeof(struct name_cache)); 1334 if (*name_cache_variable == NULL) 1335 lafe_errc(1, ENOMEM, "No more memory"); 1336 (*name_cache_variable)->size = name_cache_size; 1337 } 1338 1339 cache = *name_cache_variable; 1340 cache->probes++; 1341 1342 slot = id % cache->size; 1343 if (cache->cache[slot].name != NULL) { 1344 if (cache->cache[slot].id == id) { 1345 cache->hits++; 1346 return (cache->cache[slot].name); 1347 } 1348 free(cache->cache[slot].name); 1349 cache->cache[slot].name = NULL; 1350 } 1351 1352 if (lookup_fn(cpio, &name, id)) { 1353 /* If lookup failed, format it as a number. */ 1354 snprintf(asnum, sizeof(asnum), "%u", (unsigned)id); 1355 name = asnum; 1356 } 1357 1358 cache->cache[slot].name = strdup(name); 1359 if (cache->cache[slot].name != NULL) { 1360 cache->cache[slot].id = id; 1361 return (cache->cache[slot].name); 1362 } 1363 1364 /* 1365 * Conveniently, NULL marks an empty slot, so 1366 * if the strdup() fails, we've just failed to 1367 * cache it. No recovery necessary. 1368 */ 1369 return (NULL); 1370} 1371 1372static const char * 1373lookup_uname(struct cpio *cpio, uid_t uid) 1374{ 1375 return (lookup_name(cpio, &cpio->uname_cache, 1376 &lookup_uname_helper, (id_t)uid)); 1377} 1378 1379static int 1380lookup_uname_helper(struct cpio *cpio, const char **name, id_t id) 1381{ 1382 struct passwd *pwent; 1383 1384 (void)cpio; /* UNUSED */ 1385 1386 errno = 0; 1387 pwent = getpwuid((uid_t)id); 1388 if (pwent == NULL) { 1389 if (errno && errno != ENOENT) 1390 lafe_warnc(errno, "getpwuid(%s) failed", 1391 cpio_i64toa((int64_t)id)); 1392 return 1; 1393 } 1394 1395 *name = pwent->pw_name; 1396 return 0; 1397} 1398 1399static const char * 1400lookup_gname(struct cpio *cpio, gid_t gid) 1401{ 1402 return (lookup_name(cpio, &cpio->gname_cache, 1403 &lookup_gname_helper, (id_t)gid)); 1404} 1405 1406static int 1407lookup_gname_helper(struct cpio *cpio, const char **name, id_t id) 1408{ 1409 struct group *grent; 1410 1411 (void)cpio; /* UNUSED */ 1412 1413 errno = 0; 1414 grent = getgrgid((gid_t)id); 1415 if (grent == NULL) { 1416 if (errno && errno != ENOENT) 1417 lafe_warnc(errno, "getgrgid(%s) failed", 1418 cpio_i64toa((int64_t)id)); 1419 return 1; 1420 } 1421 1422 *name = grent->gr_name; 1423 return 0; 1424} 1425 1426/* 1427 * It would be nice to just use printf() for formatting large numbers, 1428 * but the compatibility problems are a big headache. Hence the 1429 * following simple utility function. 1430 */ 1431const char * 1432cpio_i64toa(int64_t n0) 1433{ 1434 /* 2^64 =~ 1.8 * 10^19, so 20 decimal digits suffice. 1435 * We also need 1 byte for '-' and 1 for '\0'. 1436 */ 1437 static char buff[22]; 1438 int64_t n = n0 < 0 ? -n0 : n0; 1439 char *p = buff + sizeof(buff); 1440 1441 *--p = '\0'; 1442 do { 1443 *--p = '0' + (int)(n % 10); 1444 n /= 10; 1445 } while (n > 0); 1446 if (n0 < 0) 1447 *--p = '-'; 1448 return p; 1449} 1450 1451#define PPBUFF_SIZE 1024 1452static const char * 1453passphrase_callback(struct archive *a, void *_client_data) 1454{ 1455 struct cpio *cpio = (struct cpio *)_client_data; 1456 (void)a; /* UNUSED */ 1457 1458 if (cpio->ppbuff == NULL) { 1459 cpio->ppbuff = malloc(PPBUFF_SIZE); 1460 if (cpio->ppbuff == NULL) 1461 lafe_errc(1, errno, "Out of memory"); 1462 } 1463 return lafe_readpassphrase("Enter passphrase:", 1464 cpio->ppbuff, PPBUFF_SIZE); 1465} 1466 1467static void 1468passphrase_free(char *ppbuff) 1469{ 1470 if (ppbuff != NULL) { 1471 memset(ppbuff, 0, PPBUFF_SIZE); 1472 free(ppbuff); 1473 } 1474} 1475