cpio.c revision 358926
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 358926 2020-03-13 01:05:55Z 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 char *tptr; 138 int uid, gid; 139 int opt, t; 140 141 cpio = &_cpio; 142 memset(cpio, 0, sizeof(*cpio)); 143 cpio->buff = buff; 144 cpio->buff_size = sizeof(buff); 145 146#if defined(HAVE_SIGACTION) && defined(SIGPIPE) 147 { /* Ignore SIGPIPE signals. */ 148 struct sigaction sa; 149 sigemptyset(&sa.sa_mask); 150 sa.sa_flags = 0; 151 sa.sa_handler = SIG_IGN; 152 sigaction(SIGPIPE, &sa, NULL); 153 } 154#endif 155 156 /* Set lafe_progname before calling lafe_warnc. */ 157 lafe_setprogname(*argv, "bsdcpio"); 158 159#if HAVE_SETLOCALE 160 if (setlocale(LC_ALL, "") == NULL) 161 lafe_warnc(0, "Failed to set default locale"); 162#endif 163 164 cpio->uid_override = -1; 165 cpio->gid_override = -1; 166 cpio->argv = argv; 167 cpio->argc = argc; 168 cpio->mode = '\0'; 169 cpio->verbose = 0; 170 cpio->compress = '\0'; 171 cpio->extract_flags = ARCHIVE_EXTRACT_NO_AUTODIR; 172 cpio->extract_flags |= ARCHIVE_EXTRACT_NO_OVERWRITE_NEWER; 173 cpio->extract_flags |= ARCHIVE_EXTRACT_SECURE_SYMLINKS; 174 cpio->extract_flags |= ARCHIVE_EXTRACT_SECURE_NODOTDOT; 175 cpio->extract_flags |= ARCHIVE_EXTRACT_SECURE_NOABSOLUTEPATHS; 176 cpio->extract_flags |= ARCHIVE_EXTRACT_PERM; 177 cpio->extract_flags |= ARCHIVE_EXTRACT_FFLAGS; 178 cpio->extract_flags |= ARCHIVE_EXTRACT_ACL; 179#if !defined(_WIN32) && !defined(__CYGWIN__) 180 if (geteuid() == 0) 181 cpio->extract_flags |= ARCHIVE_EXTRACT_OWNER; 182#endif 183 cpio->bytes_per_block = 512; 184 cpio->filename = NULL; 185 186 cpio->matching = archive_match_new(); 187 if (cpio->matching == NULL) 188 lafe_errc(1, 0, "Out of memory"); 189 190 while ((opt = cpio_getopt(cpio)) != -1) { 191 switch (opt) { 192 case '0': /* GNU convention: --null, -0 */ 193 cpio->option_null = 1; 194 break; 195 case 'A': /* NetBSD/OpenBSD */ 196 cpio->option_append = 1; 197 break; 198 case 'a': /* POSIX 1997 */ 199 cpio->option_atime_restore = 1; 200 break; 201 case 'B': /* POSIX 1997 */ 202 cpio->bytes_per_block = 5120; 203 break; 204 case OPTION_B64ENCODE: 205 cpio->add_filter = opt; 206 break; 207 case 'C': /* NetBSD/OpenBSD */ 208 errno = 0; 209 tptr = NULL; 210 t = (int)strtol(cpio->argument, &tptr, 10); 211 if (errno || t <= 0 || *(cpio->argument) == '\0' || 212 tptr == NULL || *tptr != '\0') { 213 lafe_errc(1, 0, "Invalid blocksize: %s", 214 cpio->argument); 215 } 216 cpio->bytes_per_block = t; 217 break; 218 case 'c': /* POSIX 1997 */ 219 cpio->format = "odc"; 220 break; 221 case 'd': /* POSIX 1997 */ 222 cpio->extract_flags &= ~ARCHIVE_EXTRACT_NO_AUTODIR; 223 break; 224 case 'E': /* NetBSD/OpenBSD */ 225 if (archive_match_include_pattern_from_file( 226 cpio->matching, cpio->argument, 227 cpio->option_null) != ARCHIVE_OK) 228 lafe_errc(1, 0, "Error : %s", 229 archive_error_string(cpio->matching)); 230 break; 231 case 'F': /* NetBSD/OpenBSD/GNU cpio */ 232 cpio->filename = cpio->argument; 233 break; 234 case 'f': /* POSIX 1997 */ 235 if (archive_match_exclude_pattern(cpio->matching, 236 cpio->argument) != ARCHIVE_OK) 237 lafe_errc(1, 0, "Error : %s", 238 archive_error_string(cpio->matching)); 239 break; 240 case OPTION_GRZIP: 241 cpio->compress = opt; 242 break; 243 case 'H': /* GNU cpio (also --format) */ 244 cpio->format = cpio->argument; 245 break; 246 case 'h': 247 long_help(); 248 break; 249 case 'I': /* NetBSD/OpenBSD */ 250 cpio->filename = cpio->argument; 251 break; 252 case 'i': /* POSIX 1997 */ 253 if (cpio->mode != '\0') 254 lafe_errc(1, 0, 255 "Cannot use both -i and -%c", cpio->mode); 256 cpio->mode = opt; 257 break; 258 case 'J': /* GNU tar, others */ 259 cpio->compress = opt; 260 break; 261 case 'j': /* GNU tar, others */ 262 cpio->compress = opt; 263 break; 264 case OPTION_INSECURE: 265 cpio->extract_flags &= ~ARCHIVE_EXTRACT_SECURE_SYMLINKS; 266 cpio->extract_flags &= ~ARCHIVE_EXTRACT_SECURE_NODOTDOT; 267 cpio->extract_flags &= ~ARCHIVE_EXTRACT_SECURE_NOABSOLUTEPATHS; 268 break; 269 case 'L': /* GNU cpio */ 270 cpio->option_follow_links = 1; 271 break; 272 case 'l': /* POSIX 1997 */ 273 cpio->option_link = 1; 274 break; 275 case OPTION_LRZIP: 276 case OPTION_LZ4: 277 case OPTION_LZMA: /* GNU tar, others */ 278 case OPTION_LZOP: /* GNU tar, others */ 279 case OPTION_ZSTD: 280 cpio->compress = opt; 281 break; 282 case 'm': /* POSIX 1997 */ 283 cpio->extract_flags |= ARCHIVE_EXTRACT_TIME; 284 break; 285 case 'n': /* GNU cpio */ 286 cpio->option_numeric_uid_gid = 1; 287 break; 288 case OPTION_NO_PRESERVE_OWNER: /* GNU cpio */ 289 cpio->extract_flags &= ~ARCHIVE_EXTRACT_OWNER; 290 break; 291 case 'O': /* GNU cpio */ 292 cpio->filename = cpio->argument; 293 break; 294 case 'o': /* POSIX 1997 */ 295 if (cpio->mode != '\0') 296 lafe_errc(1, 0, 297 "Cannot use both -o and -%c", cpio->mode); 298 cpio->mode = opt; 299 break; 300 case 'p': /* POSIX 1997 */ 301 if (cpio->mode != '\0') 302 lafe_errc(1, 0, 303 "Cannot use both -p and -%c", cpio->mode); 304 cpio->mode = opt; 305 cpio->extract_flags &= ~ARCHIVE_EXTRACT_SECURE_NODOTDOT; 306 cpio->extract_flags &= ~ARCHIVE_EXTRACT_SECURE_NOABSOLUTEPATHS; 307 break; 308 case OPTION_PASSPHRASE: 309 cpio->passphrase = cpio->argument; 310 break; 311 case OPTION_PRESERVE_OWNER: 312 cpio->extract_flags |= ARCHIVE_EXTRACT_OWNER; 313 break; 314 case OPTION_QUIET: /* GNU cpio */ 315 cpio->quiet = 1; 316 break; 317 case 'R': /* GNU cpio, also --owner */ 318 /* TODO: owner_parse should return uname/gname 319 * also; use that to set [ug]name_override. */ 320 errmsg = owner_parse(cpio->argument, &uid, &gid); 321 if (errmsg) { 322 lafe_warnc(-1, "%s", errmsg); 323 usage(); 324 } 325 if (uid != -1) { 326 cpio->uid_override = uid; 327 cpio->uname_override = NULL; 328 } 329 if (gid != -1) { 330 cpio->gid_override = gid; 331 cpio->gname_override = NULL; 332 } 333 break; 334 case 'r': /* POSIX 1997 */ 335 cpio->option_rename = 1; 336 break; 337 case 't': /* POSIX 1997 */ 338 cpio->option_list = 1; 339 break; 340 case 'u': /* POSIX 1997 */ 341 cpio->extract_flags 342 &= ~ARCHIVE_EXTRACT_NO_OVERWRITE_NEWER; 343 break; 344 case OPTION_UUENCODE: 345 cpio->add_filter = opt; 346 break; 347 case 'v': /* POSIX 1997 */ 348 cpio->verbose++; 349 break; 350 case 'V': /* GNU cpio */ 351 cpio->dot++; 352 break; 353 case OPTION_VERSION: /* GNU convention */ 354 version(); 355 break; 356#if 0 357 /* 358 * cpio_getopt() handles -W specially, so it's not 359 * available here. 360 */ 361 case 'W': /* Obscure, but useful GNU convention. */ 362 break; 363#endif 364 case 'y': /* tar convention */ 365 cpio->compress = opt; 366 break; 367 case 'Z': /* tar convention */ 368 cpio->compress = opt; 369 break; 370 case 'z': /* tar convention */ 371 cpio->compress = opt; 372 break; 373 default: 374 usage(); 375 } 376 } 377 378 /* 379 * Sanity-check args, error out on nonsensical combinations. 380 */ 381 /* -t implies -i if no mode was specified. */ 382 if (cpio->option_list && cpio->mode == '\0') 383 cpio->mode = 'i'; 384 /* -t requires -i */ 385 if (cpio->option_list && cpio->mode != 'i') 386 lafe_errc(1, 0, "Option -t requires -i"); 387 /* -n requires -it */ 388 if (cpio->option_numeric_uid_gid && !cpio->option_list) 389 lafe_errc(1, 0, "Option -n requires -it"); 390 /* Can only specify format when writing */ 391 if (cpio->format != NULL && cpio->mode != 'o') 392 lafe_errc(1, 0, "Option --format requires -o"); 393 /* -l requires -p */ 394 if (cpio->option_link && cpio->mode != 'p') 395 lafe_errc(1, 0, "Option -l requires -p"); 396 /* -v overrides -V */ 397 if (cpio->dot && cpio->verbose) 398 cpio->dot = 0; 399 /* TODO: Flag other nonsensical combinations. */ 400 401 switch (cpio->mode) { 402 case 'o': 403 /* TODO: Implement old binary format in libarchive, 404 use that here. */ 405 if (cpio->format == NULL) 406 cpio->format = "odc"; /* Default format */ 407 408 mode_out(cpio); 409 break; 410 case 'i': 411 while (*cpio->argv != NULL) { 412 if (archive_match_include_pattern(cpio->matching, 413 *cpio->argv) != ARCHIVE_OK) 414 lafe_errc(1, 0, "Error : %s", 415 archive_error_string(cpio->matching)); 416 --cpio->argc; 417 ++cpio->argv; 418 } 419 if (cpio->option_list) 420 mode_list(cpio); 421 else 422 mode_in(cpio); 423 break; 424 case 'p': 425 if (*cpio->argv == NULL || **cpio->argv == '\0') 426 lafe_errc(1, 0, 427 "-p mode requires a target directory"); 428 mode_pass(cpio, *cpio->argv); 429 break; 430 default: 431 lafe_errc(1, 0, 432 "Must specify at least one of -i, -o, or -p"); 433 } 434 435 archive_match_free(cpio->matching); 436 free_cache(cpio->gname_cache); 437 free_cache(cpio->uname_cache); 438 free(cpio->destdir); 439 passphrase_free(cpio->ppbuff); 440 return (cpio->return_value); 441} 442 443static void 444usage(void) 445{ 446 const char *p; 447 448 p = lafe_getprogname(); 449 450 fprintf(stderr, "Brief Usage:\n"); 451 fprintf(stderr, " List: %s -it < archive\n", p); 452 fprintf(stderr, " Extract: %s -i < archive\n", p); 453 fprintf(stderr, " Create: %s -o < filenames > archive\n", p); 454 fprintf(stderr, " Help: %s --help\n", p); 455 exit(1); 456} 457 458static const char *long_help_msg = 459 "First option must be a mode specifier:\n" 460 " -i Input -o Output -p Pass\n" 461 "Common Options:\n" 462 " -v Verbose filenames -V one dot per file\n" 463 "Create: %p -o [options] < [list of files] > [archive]\n" 464 " -J,-y,-z,--lzma Compress archive with xz/bzip2/gzip/lzma\n" 465 " --format {odc|newc|ustar} Select archive format\n" 466 "List: %p -it < [archive]\n" 467 "Extract: %p -i [options] < [archive]\n"; 468 469 470/* 471 * Note that the word 'bsdcpio' will always appear in the first line 472 * of output. 473 * 474 * In particular, /bin/sh scripts that need to test for the presence 475 * of bsdcpio can use the following template: 476 * 477 * if (cpio --help 2>&1 | grep bsdcpio >/dev/null 2>&1 ) then \ 478 * echo bsdcpio; else echo not bsdcpio; fi 479 */ 480static void 481long_help(void) 482{ 483 const char *prog; 484 const char *p; 485 486 prog = lafe_getprogname(); 487 488 fflush(stderr); 489 490 p = (strcmp(prog,"bsdcpio") != 0) ? "(bsdcpio)" : ""; 491 printf("%s%s: manipulate archive files\n", prog, p); 492 493 for (p = long_help_msg; *p != '\0'; p++) { 494 if (*p == '%') { 495 if (p[1] == 'p') { 496 fputs(prog, stdout); 497 p++; 498 } else 499 putchar('%'); 500 } else 501 putchar(*p); 502 } 503 version(); 504} 505 506static void 507version(void) 508{ 509 fprintf(stdout,"bsdcpio %s - %s \n", 510 BSDCPIO_VERSION_STRING, 511 archive_version_details()); 512 exit(0); 513} 514 515static void 516mode_out(struct cpio *cpio) 517{ 518 struct archive_entry *entry, *spare; 519 struct lafe_line_reader *lr; 520 const char *p; 521 int r; 522 523 if (cpio->option_append) 524 lafe_errc(1, 0, "Append mode not yet supported."); 525 526 cpio->archive_read_disk = archive_read_disk_new(); 527 if (cpio->archive_read_disk == NULL) 528 lafe_errc(1, 0, "Failed to allocate archive object"); 529 if (cpio->option_follow_links) 530 archive_read_disk_set_symlink_logical(cpio->archive_read_disk); 531 else 532 archive_read_disk_set_symlink_physical(cpio->archive_read_disk); 533 archive_read_disk_set_standard_lookup(cpio->archive_read_disk); 534 535 cpio->archive = archive_write_new(); 536 if (cpio->archive == NULL) 537 lafe_errc(1, 0, "Failed to allocate archive object"); 538 switch (cpio->compress) { 539 case OPTION_GRZIP: 540 r = archive_write_add_filter_grzip(cpio->archive); 541 break; 542 case 'J': 543 r = archive_write_add_filter_xz(cpio->archive); 544 break; 545 case OPTION_LRZIP: 546 r = archive_write_add_filter_lrzip(cpio->archive); 547 break; 548 case OPTION_LZ4: 549 r = archive_write_add_filter_lz4(cpio->archive); 550 break; 551 case OPTION_LZMA: 552 r = archive_write_add_filter_lzma(cpio->archive); 553 break; 554 case OPTION_LZOP: 555 r = archive_write_add_filter_lzop(cpio->archive); 556 break; 557 case OPTION_ZSTD: 558 r = archive_write_add_filter_zstd(cpio->archive); 559 break; 560 case 'j': case 'y': 561 r = archive_write_add_filter_bzip2(cpio->archive); 562 break; 563 case 'z': 564 r = archive_write_add_filter_gzip(cpio->archive); 565 break; 566 case 'Z': 567 r = archive_write_add_filter_compress(cpio->archive); 568 break; 569 default: 570 r = archive_write_add_filter_none(cpio->archive); 571 break; 572 } 573 if (r < ARCHIVE_WARN) 574 lafe_errc(1, 0, "Requested compression not available"); 575 switch (cpio->add_filter) { 576 case 0: 577 r = ARCHIVE_OK; 578 break; 579 case OPTION_B64ENCODE: 580 r = archive_write_add_filter_b64encode(cpio->archive); 581 break; 582 case OPTION_UUENCODE: 583 r = archive_write_add_filter_uuencode(cpio->archive); 584 break; 585 } 586 if (r < ARCHIVE_WARN) 587 lafe_errc(1, 0, "Requested filter not available"); 588 r = archive_write_set_format_by_name(cpio->archive, cpio->format); 589 if (r != ARCHIVE_OK) 590 lafe_errc(1, 0, "%s", archive_error_string(cpio->archive)); 591 archive_write_set_bytes_per_block(cpio->archive, cpio->bytes_per_block); 592 cpio->linkresolver = archive_entry_linkresolver_new(); 593 archive_entry_linkresolver_set_strategy(cpio->linkresolver, 594 archive_format(cpio->archive)); 595 if (cpio->passphrase != NULL) 596 r = archive_write_set_passphrase(cpio->archive, 597 cpio->passphrase); 598 else 599 r = archive_write_set_passphrase_callback(cpio->archive, cpio, 600 &passphrase_callback); 601 if (r != ARCHIVE_OK) 602 lafe_errc(1, 0, "%s", archive_error_string(cpio->archive)); 603 604 /* 605 * The main loop: Copy each file into the output archive. 606 */ 607 r = archive_write_open_filename(cpio->archive, cpio->filename); 608 if (r != ARCHIVE_OK) 609 lafe_errc(1, 0, "%s", archive_error_string(cpio->archive)); 610 lr = lafe_line_reader("-", cpio->option_null); 611 while ((p = lafe_line_reader_next(lr)) != NULL) 612 file_to_archive(cpio, p); 613 lafe_line_reader_free(lr); 614 615 /* 616 * The hardlink detection may have queued up a couple of entries 617 * that can now be flushed. 618 */ 619 entry = NULL; 620 archive_entry_linkify(cpio->linkresolver, &entry, &spare); 621 while (entry != NULL) { 622 entry_to_archive(cpio, entry); 623 archive_entry_free(entry); 624 entry = NULL; 625 archive_entry_linkify(cpio->linkresolver, &entry, &spare); 626 } 627 628 r = archive_write_close(cpio->archive); 629 if (cpio->dot) 630 fprintf(stderr, "\n"); 631 if (r != ARCHIVE_OK) 632 lafe_errc(1, 0, "%s", archive_error_string(cpio->archive)); 633 634 if (!cpio->quiet) { 635 int64_t blocks = 636 (archive_filter_bytes(cpio->archive, 0) + 511) 637 / 512; 638 fprintf(stderr, "%lu %s\n", (unsigned long)blocks, 639 blocks == 1 ? "block" : "blocks"); 640 } 641 archive_write_free(cpio->archive); 642 archive_entry_linkresolver_free(cpio->linkresolver); 643} 644 645static const char * 646remove_leading_slash(const char *p) 647{ 648 const char *rp; 649 650 /* Remove leading "//./" or "//?/" or "//?/UNC/" 651 * (absolute path prefixes used by Windows API) */ 652 if ((p[0] == '/' || p[0] == '\\') && 653 (p[1] == '/' || p[1] == '\\') && 654 (p[2] == '.' || p[2] == '?') && 655 (p[3] == '/' || p[3] == '\\')) 656 { 657 if (p[2] == '?' && 658 (p[4] == 'U' || p[4] == 'u') && 659 (p[5] == 'N' || p[5] == 'n') && 660 (p[6] == 'C' || p[6] == 'c') && 661 (p[7] == '/' || p[7] == '\\')) 662 p += 8; 663 else 664 p += 4; 665 } 666 do { 667 rp = p; 668 /* Remove leading drive letter from archives created 669 * on Windows. */ 670 if (((p[0] >= 'a' && p[0] <= 'z') || 671 (p[0] >= 'A' && p[0] <= 'Z')) && 672 p[1] == ':') { 673 p += 2; 674 } 675 /* Remove leading "/../", "//", etc. */ 676 while (p[0] == '/' || p[0] == '\\') { 677 if (p[1] == '.' && p[2] == '.' && 678 (p[3] == '/' || p[3] == '\\')) { 679 p += 3; /* Remove "/..", leave "/" 680 * for next pass. */ 681 } else 682 p += 1; /* Remove "/". */ 683 } 684 } while (rp != p); 685 return (p); 686} 687 688/* 689 * This is used by both out mode (to copy objects from disk into 690 * an archive) and pass mode (to copy objects from disk to 691 * an archive_write_disk "archive"). 692 */ 693static int 694file_to_archive(struct cpio *cpio, const char *srcpath) 695{ 696 const char *destpath; 697 struct archive_entry *entry, *spare; 698 size_t len; 699 int r; 700 701 /* 702 * Create an archive_entry describing the source file. 703 * 704 */ 705 entry = archive_entry_new(); 706 if (entry == NULL) 707 lafe_errc(1, 0, "Couldn't allocate entry"); 708 archive_entry_copy_sourcepath(entry, srcpath); 709 r = archive_read_disk_entry_from_file(cpio->archive_read_disk, 710 entry, -1, NULL); 711 if (r < ARCHIVE_FAILED) 712 lafe_errc(1, 0, "%s", 713 archive_error_string(cpio->archive_read_disk)); 714 if (r < ARCHIVE_OK) 715 lafe_warnc(0, "%s", 716 archive_error_string(cpio->archive_read_disk)); 717 if (r <= ARCHIVE_FAILED) { 718 archive_entry_free(entry); 719 cpio->return_value = 1; 720 return (r); 721 } 722 723 if (cpio->uid_override >= 0) { 724 archive_entry_set_uid(entry, cpio->uid_override); 725 archive_entry_set_uname(entry, cpio->uname_override); 726 } 727 if (cpio->gid_override >= 0) { 728 archive_entry_set_gid(entry, cpio->gid_override); 729 archive_entry_set_gname(entry, cpio->gname_override); 730 } 731 732 /* 733 * Generate a destination path for this entry. 734 * "destination path" is the name to which it will be copied in 735 * pass mode or the name that will go into the archive in 736 * output mode. 737 */ 738 destpath = srcpath; 739 if (cpio->destdir) { 740 len = cpio->destdir_len + strlen(srcpath) + 8; 741 if (len >= cpio->pass_destpath_alloc) { 742 while (len >= cpio->pass_destpath_alloc) { 743 cpio->pass_destpath_alloc += 512; 744 cpio->pass_destpath_alloc *= 2; 745 } 746 free(cpio->pass_destpath); 747 cpio->pass_destpath = malloc(cpio->pass_destpath_alloc); 748 if (cpio->pass_destpath == NULL) 749 lafe_errc(1, ENOMEM, 750 "Can't allocate path buffer"); 751 } 752 strcpy(cpio->pass_destpath, cpio->destdir); 753 strcat(cpio->pass_destpath, remove_leading_slash(srcpath)); 754 destpath = cpio->pass_destpath; 755 } 756 if (cpio->option_rename) 757 destpath = cpio_rename(destpath); 758 if (destpath == NULL) { 759 archive_entry_free(entry); 760 return (0); 761 } 762 archive_entry_copy_pathname(entry, destpath); 763 764 /* 765 * If we're trying to preserve hardlinks, match them here. 766 */ 767 spare = NULL; 768 if (cpio->linkresolver != NULL 769 && archive_entry_filetype(entry) != AE_IFDIR) { 770 archive_entry_linkify(cpio->linkresolver, &entry, &spare); 771 } 772 773 if (entry != NULL) { 774 r = entry_to_archive(cpio, entry); 775 archive_entry_free(entry); 776 if (spare != NULL) { 777 if (r == 0) 778 r = entry_to_archive(cpio, spare); 779 archive_entry_free(spare); 780 } 781 } 782 return (r); 783} 784 785static int 786entry_to_archive(struct cpio *cpio, struct archive_entry *entry) 787{ 788 const char *destpath = archive_entry_pathname(entry); 789 const char *srcpath = archive_entry_sourcepath(entry); 790 int fd = -1; 791 ssize_t bytes_read; 792 int r; 793 794 /* Print out the destination name to the user. */ 795 if (cpio->verbose) 796 fprintf(stderr,"%s", destpath); 797 if (cpio->dot) 798 fprintf(stderr, "."); 799 800 /* 801 * Option_link only makes sense in pass mode and for 802 * regular files. Also note: if a link operation fails 803 * because of cross-device restrictions, we'll fall back 804 * to copy mode for that entry. 805 * 806 * TODO: Test other cpio implementations to see if they 807 * hard-link anything other than regular files here. 808 */ 809 if (cpio->option_link 810 && archive_entry_filetype(entry) == AE_IFREG) 811 { 812 struct archive_entry *t; 813 /* Save the original entry in case we need it later. */ 814 t = archive_entry_clone(entry); 815 if (t == NULL) 816 lafe_errc(1, ENOMEM, "Can't create link"); 817 /* Note: link(2) doesn't create parent directories, 818 * so we use archive_write_header() instead as a 819 * convenience. */ 820 archive_entry_set_hardlink(t, srcpath); 821 /* This is a straight link that carries no data. */ 822 archive_entry_set_size(t, 0); 823 r = archive_write_header(cpio->archive, t); 824 archive_entry_free(t); 825 if (r != ARCHIVE_OK) 826 lafe_warnc(archive_errno(cpio->archive), 827 "%s", archive_error_string(cpio->archive)); 828 if (r == ARCHIVE_FATAL) 829 exit(1); 830#ifdef EXDEV 831 if (r != ARCHIVE_OK && archive_errno(cpio->archive) == EXDEV) { 832 /* Cross-device link: Just fall through and use 833 * the original entry to copy the file over. */ 834 lafe_warnc(0, "Copying file instead"); 835 } else 836#endif 837 return (0); 838 } 839 840 /* 841 * Make sure we can open the file (if necessary) before 842 * trying to write the header. 843 */ 844 if (archive_entry_filetype(entry) == AE_IFREG) { 845 if (archive_entry_size(entry) > 0) { 846 fd = open(srcpath, O_RDONLY | O_BINARY); 847 if (fd < 0) { 848 lafe_warnc(errno, 849 "%s: could not open file", srcpath); 850 goto cleanup; 851 } 852 } 853 } else { 854 archive_entry_set_size(entry, 0); 855 } 856 857 r = archive_write_header(cpio->archive, entry); 858 859 if (r != ARCHIVE_OK) 860 lafe_warnc(archive_errno(cpio->archive), 861 "%s: %s", 862 srcpath, 863 archive_error_string(cpio->archive)); 864 865 if (r == ARCHIVE_FATAL) 866 exit(1); 867 868 if (r >= ARCHIVE_WARN && archive_entry_size(entry) > 0 && fd >= 0) { 869 bytes_read = read(fd, cpio->buff, (unsigned)cpio->buff_size); 870 while (bytes_read > 0) { 871 ssize_t bytes_write; 872 bytes_write = archive_write_data(cpio->archive, 873 cpio->buff, bytes_read); 874 if (bytes_write < 0) 875 lafe_errc(1, archive_errno(cpio->archive), 876 "%s", archive_error_string(cpio->archive)); 877 if (bytes_write < bytes_read) { 878 lafe_warnc(0, 879 "Truncated write; file may have " 880 "grown while being archived."); 881 } 882 bytes_read = read(fd, cpio->buff, 883 (unsigned)cpio->buff_size); 884 } 885 } 886 887 fd = restore_time(cpio, entry, srcpath, fd); 888 889cleanup: 890 if (cpio->verbose) 891 fprintf(stderr,"\n"); 892 if (fd >= 0) 893 close(fd); 894 return (0); 895} 896 897static int 898restore_time(struct cpio *cpio, struct archive_entry *entry, 899 const char *name, int fd) 900{ 901#ifndef HAVE_UTIMES 902 static int warned = 0; 903 904 (void)cpio; /* UNUSED */ 905 (void)entry; /* UNUSED */ 906 (void)name; /* UNUSED */ 907 908 if (!warned) 909 lafe_warnc(0, "Can't restore access times on this platform"); 910 warned = 1; 911 return (fd); 912#else 913#if defined(_WIN32) && !defined(__CYGWIN__) 914 struct __timeval times[2]; 915#else 916 struct timeval times[2]; 917#endif 918 919 if (!cpio->option_atime_restore) 920 return (fd); 921 922 times[1].tv_sec = archive_entry_mtime(entry); 923 times[1].tv_usec = archive_entry_mtime_nsec(entry) / 1000; 924 925 times[0].tv_sec = archive_entry_atime(entry); 926 times[0].tv_usec = archive_entry_atime_nsec(entry) / 1000; 927 928#if defined(HAVE_FUTIMES) && !defined(__CYGWIN__) 929 if (fd >= 0 && futimes(fd, times) == 0) 930 return (fd); 931#endif 932 /* 933 * Some platform cannot restore access times if the file descriptor 934 * is still opened. 935 */ 936 if (fd >= 0) { 937 close(fd); 938 fd = -1; 939 } 940 941#ifdef HAVE_LUTIMES 942 if (lutimes(name, times) != 0) 943#else 944 if ((AE_IFLNK != archive_entry_filetype(entry)) 945 && utimes(name, times) != 0) 946#endif 947 lafe_warnc(errno, "Can't update time for %s", name); 948#endif 949 return (fd); 950} 951 952 953static void 954mode_in(struct cpio *cpio) 955{ 956 struct archive *a; 957 struct archive_entry *entry; 958 struct archive *ext; 959 const char *destpath; 960 int r; 961 962 ext = archive_write_disk_new(); 963 if (ext == NULL) 964 lafe_errc(1, 0, "Couldn't allocate restore object"); 965 r = archive_write_disk_set_options(ext, cpio->extract_flags); 966 if (r != ARCHIVE_OK) 967 lafe_errc(1, 0, "%s", archive_error_string(ext)); 968 a = archive_read_new(); 969 if (a == NULL) 970 lafe_errc(1, 0, "Couldn't allocate archive object"); 971 archive_read_support_filter_all(a); 972 archive_read_support_format_all(a); 973 if (cpio->passphrase != NULL) 974 r = archive_read_add_passphrase(a, cpio->passphrase); 975 else 976 r = archive_read_set_passphrase_callback(a, cpio, 977 &passphrase_callback); 978 if (r != ARCHIVE_OK) 979 lafe_errc(1, 0, "%s", archive_error_string(a)); 980 981 if (archive_read_open_filename(a, cpio->filename, 982 cpio->bytes_per_block)) 983 lafe_errc(1, archive_errno(a), 984 "%s", archive_error_string(a)); 985 for (;;) { 986 r = archive_read_next_header(a, &entry); 987 if (r == ARCHIVE_EOF) 988 break; 989 if (r != ARCHIVE_OK) { 990 lafe_errc(1, archive_errno(a), 991 "%s", archive_error_string(a)); 992 } 993 if (archive_match_path_excluded(cpio->matching, entry)) 994 continue; 995 if (cpio->option_rename) { 996 destpath = cpio_rename(archive_entry_pathname(entry)); 997 archive_entry_set_pathname(entry, destpath); 998 } else 999 destpath = archive_entry_pathname(entry); 1000 if (destpath == NULL) 1001 continue; 1002 if (cpio->verbose) 1003 fprintf(stderr, "%s\n", destpath); 1004 if (cpio->dot) 1005 fprintf(stderr, "."); 1006 if (cpio->uid_override >= 0) 1007 archive_entry_set_uid(entry, cpio->uid_override); 1008 if (cpio->gid_override >= 0) 1009 archive_entry_set_gid(entry, cpio->gid_override); 1010 r = archive_write_header(ext, entry); 1011 if (r != ARCHIVE_OK) { 1012 fprintf(stderr, "%s: %s\n", 1013 archive_entry_pathname(entry), 1014 archive_error_string(ext)); 1015 } else if (!archive_entry_size_is_set(entry) 1016 || archive_entry_size(entry) > 0) { 1017 r = extract_data(a, ext); 1018 if (r != ARCHIVE_OK) 1019 cpio->return_value = 1; 1020 } 1021 } 1022 r = archive_read_close(a); 1023 if (cpio->dot) 1024 fprintf(stderr, "\n"); 1025 if (r != ARCHIVE_OK) 1026 lafe_errc(1, 0, "%s", archive_error_string(a)); 1027 r = archive_write_close(ext); 1028 if (r != ARCHIVE_OK) 1029 lafe_errc(1, 0, "%s", archive_error_string(ext)); 1030 if (!cpio->quiet) { 1031 int64_t blocks = (archive_filter_bytes(a, 0) + 511) 1032 / 512; 1033 fprintf(stderr, "%lu %s\n", (unsigned long)blocks, 1034 blocks == 1 ? "block" : "blocks"); 1035 } 1036 archive_read_free(a); 1037 archive_write_free(ext); 1038 exit(cpio->return_value); 1039} 1040 1041/* 1042 * Exits if there's a fatal error. Returns ARCHIVE_OK 1043 * if everything is kosher. 1044 */ 1045static int 1046extract_data(struct archive *ar, struct archive *aw) 1047{ 1048 int r; 1049 size_t size; 1050 const void *block; 1051 int64_t offset; 1052 1053 for (;;) { 1054 r = archive_read_data_block(ar, &block, &size, &offset); 1055 if (r == ARCHIVE_EOF) 1056 return (ARCHIVE_OK); 1057 if (r != ARCHIVE_OK) { 1058 lafe_warnc(archive_errno(ar), 1059 "%s", archive_error_string(ar)); 1060 exit(1); 1061 } 1062 r = (int)archive_write_data_block(aw, block, size, offset); 1063 if (r != ARCHIVE_OK) { 1064 lafe_warnc(archive_errno(aw), 1065 "%s", archive_error_string(aw)); 1066 return (r); 1067 } 1068 } 1069} 1070 1071static void 1072mode_list(struct cpio *cpio) 1073{ 1074 struct archive *a; 1075 struct archive_entry *entry; 1076 int r; 1077 1078 a = archive_read_new(); 1079 if (a == NULL) 1080 lafe_errc(1, 0, "Couldn't allocate archive object"); 1081 archive_read_support_filter_all(a); 1082 archive_read_support_format_all(a); 1083 if (cpio->passphrase != NULL) 1084 r = archive_read_add_passphrase(a, cpio->passphrase); 1085 else 1086 r = archive_read_set_passphrase_callback(a, cpio, 1087 &passphrase_callback); 1088 if (r != ARCHIVE_OK) 1089 lafe_errc(1, 0, "%s", archive_error_string(a)); 1090 1091 if (archive_read_open_filename(a, cpio->filename, 1092 cpio->bytes_per_block)) 1093 lafe_errc(1, archive_errno(a), 1094 "%s", archive_error_string(a)); 1095 for (;;) { 1096 r = archive_read_next_header(a, &entry); 1097 if (r == ARCHIVE_EOF) 1098 break; 1099 if (r != ARCHIVE_OK) { 1100 lafe_errc(1, archive_errno(a), 1101 "%s", archive_error_string(a)); 1102 } 1103 if (archive_match_path_excluded(cpio->matching, entry)) 1104 continue; 1105 if (cpio->verbose) 1106 list_item_verbose(cpio, entry); 1107 else 1108 fprintf(stdout, "%s\n", archive_entry_pathname(entry)); 1109 } 1110 r = archive_read_close(a); 1111 if (r != ARCHIVE_OK) 1112 lafe_errc(1, 0, "%s", archive_error_string(a)); 1113 if (!cpio->quiet) { 1114 int64_t blocks = (archive_filter_bytes(a, 0) + 511) 1115 / 512; 1116 fprintf(stderr, "%lu %s\n", (unsigned long)blocks, 1117 blocks == 1 ? "block" : "blocks"); 1118 } 1119 archive_read_free(a); 1120 exit(0); 1121} 1122 1123/* 1124 * Display information about the current file. 1125 * 1126 * The format here roughly duplicates the output of 'ls -l'. 1127 * This is based on SUSv2, where 'tar tv' is documented as 1128 * listing additional information in an "unspecified format," 1129 * and 'pax -l' is documented as using the same format as 'ls -l'. 1130 */ 1131static void 1132list_item_verbose(struct cpio *cpio, struct archive_entry *entry) 1133{ 1134 char size[32]; 1135 char date[32]; 1136 char uids[16], gids[16]; 1137 const char *uname, *gname; 1138 FILE *out = stdout; 1139 const char *fmt; 1140 time_t mtime; 1141 static time_t now; 1142 struct tm *ltime; 1143#if defined(HAVE_LOCALTIME_R) || defined(HAVE__LOCALTIME64_S) 1144 struct tm tmbuf; 1145#endif 1146#if defined(HAVE__LOCALTIME64_S) 1147 errno_t terr; 1148 __time64_t tmptime; 1149#endif 1150 1151 if (!now) 1152 time(&now); 1153 1154 if (cpio->option_numeric_uid_gid) { 1155 /* Format numeric uid/gid for display. */ 1156 strcpy(uids, cpio_i64toa(archive_entry_uid(entry))); 1157 uname = uids; 1158 strcpy(gids, cpio_i64toa(archive_entry_gid(entry))); 1159 gname = gids; 1160 } else { 1161 /* Use uname if it's present, else lookup name from uid. */ 1162 uname = archive_entry_uname(entry); 1163 if (uname == NULL) 1164 uname = lookup_uname(cpio, (uid_t)archive_entry_uid(entry)); 1165 /* Use gname if it's present, else lookup name from gid. */ 1166 gname = archive_entry_gname(entry); 1167 if (gname == NULL) 1168 gname = lookup_gname(cpio, (uid_t)archive_entry_gid(entry)); 1169 } 1170 1171 /* Print device number or file size. */ 1172 if (archive_entry_filetype(entry) == AE_IFCHR 1173 || archive_entry_filetype(entry) == AE_IFBLK) { 1174 snprintf(size, sizeof(size), "%lu,%lu", 1175 (unsigned long)archive_entry_rdevmajor(entry), 1176 (unsigned long)archive_entry_rdevminor(entry)); 1177 } else { 1178 strcpy(size, cpio_i64toa(archive_entry_size(entry))); 1179 } 1180 1181 /* Format the time using 'ls -l' conventions. */ 1182 mtime = archive_entry_mtime(entry); 1183#if defined(_WIN32) && !defined(__CYGWIN__) 1184 /* Windows' strftime function does not support %e format. */ 1185 if (mtime - now > 365*86400/2 1186 || mtime - now < -365*86400/2) 1187 fmt = cpio->day_first ? "%d %b %Y" : "%b %d %Y"; 1188 else 1189 fmt = cpio->day_first ? "%d %b %H:%M" : "%b %d %H:%M"; 1190#else 1191 if (mtime - now > 365*86400/2 1192 || mtime - now < -365*86400/2) 1193 fmt = cpio->day_first ? "%e %b %Y" : "%b %e %Y"; 1194 else 1195 fmt = cpio->day_first ? "%e %b %H:%M" : "%b %e %H:%M"; 1196#endif 1197#if defined(HAVE_LOCALTIME_R) 1198 ltime = localtime_r(&mtime, &tmbuf); 1199#elif defined(HAVE__LOCALTIME64_S) 1200 tmptime = mtime; 1201 terr = _localtime64_s(&tmbuf, &tmptime); 1202 if (terr) 1203 ltime = NULL; 1204 else 1205 ltime = &tmbuf; 1206#else 1207 ltime = localtime(&mtime); 1208#endif 1209 strftime(date, sizeof(date), fmt, ltime); 1210 1211 fprintf(out, "%s%3d %-8s %-8s %8s %12s %s", 1212 archive_entry_strmode(entry), 1213 archive_entry_nlink(entry), 1214 uname, gname, size, date, 1215 archive_entry_pathname(entry)); 1216 1217 /* Extra information for links. */ 1218 if (archive_entry_hardlink(entry)) /* Hard link */ 1219 fprintf(out, " link to %s", archive_entry_hardlink(entry)); 1220 else if (archive_entry_symlink(entry)) /* Symbolic link */ 1221 fprintf(out, " -> %s", archive_entry_symlink(entry)); 1222 fprintf(out, "\n"); 1223} 1224 1225static void 1226mode_pass(struct cpio *cpio, const char *destdir) 1227{ 1228 struct lafe_line_reader *lr; 1229 const char *p; 1230 int r; 1231 1232 /* Ensure target dir has a trailing '/' to simplify path surgery. */ 1233 cpio->destdir_len = strlen(destdir); 1234 cpio->destdir = malloc(cpio->destdir_len + 8); 1235 memcpy(cpio->destdir, destdir, cpio->destdir_len); 1236 if (cpio->destdir_len == 0 || destdir[cpio->destdir_len - 1] != '/') 1237 cpio->destdir[cpio->destdir_len++] = '/'; 1238 cpio->destdir[cpio->destdir_len] = '\0'; 1239 1240 cpio->archive = archive_write_disk_new(); 1241 if (cpio->archive == NULL) 1242 lafe_errc(1, 0, "Failed to allocate archive object"); 1243 r = archive_write_disk_set_options(cpio->archive, cpio->extract_flags); 1244 if (r != ARCHIVE_OK) 1245 lafe_errc(1, 0, "%s", archive_error_string(cpio->archive)); 1246 cpio->linkresolver = archive_entry_linkresolver_new(); 1247 archive_write_disk_set_standard_lookup(cpio->archive); 1248 1249 cpio->archive_read_disk = archive_read_disk_new(); 1250 if (cpio->archive_read_disk == NULL) 1251 lafe_errc(1, 0, "Failed to allocate archive object"); 1252 if (cpio->option_follow_links) 1253 archive_read_disk_set_symlink_logical(cpio->archive_read_disk); 1254 else 1255 archive_read_disk_set_symlink_physical(cpio->archive_read_disk); 1256 archive_read_disk_set_standard_lookup(cpio->archive_read_disk); 1257 1258 lr = lafe_line_reader("-", cpio->option_null); 1259 while ((p = lafe_line_reader_next(lr)) != NULL) 1260 file_to_archive(cpio, p); 1261 lafe_line_reader_free(lr); 1262 1263 archive_entry_linkresolver_free(cpio->linkresolver); 1264 r = archive_write_close(cpio->archive); 1265 if (cpio->dot) 1266 fprintf(stderr, "\n"); 1267 if (r != ARCHIVE_OK) 1268 lafe_errc(1, 0, "%s", archive_error_string(cpio->archive)); 1269 1270 if (!cpio->quiet) { 1271 int64_t blocks = 1272 (archive_filter_bytes(cpio->archive, 0) + 511) 1273 / 512; 1274 fprintf(stderr, "%lu %s\n", (unsigned long)blocks, 1275 blocks == 1 ? "block" : "blocks"); 1276 } 1277 1278 archive_write_free(cpio->archive); 1279 free(cpio->pass_destpath); 1280} 1281 1282/* 1283 * Prompt for a new name for this entry. Returns a pointer to the 1284 * new name or NULL if the entry should not be copied. This 1285 * implements the semantics defined in POSIX.1-1996, which specifies 1286 * that an input of '.' means the name should be unchanged. GNU cpio 1287 * treats '.' as a literal new name. 1288 */ 1289static const char * 1290cpio_rename(const char *name) 1291{ 1292 static char buff[1024]; 1293 FILE *t; 1294 char *p, *ret; 1295#if defined(_WIN32) && !defined(__CYGWIN__) 1296 FILE *to; 1297 1298 t = fopen("CONIN$", "r"); 1299 if (t == NULL) 1300 return (name); 1301 to = fopen("CONOUT$", "w"); 1302 if (to == NULL) { 1303 fclose(t); 1304 return (name); 1305 } 1306 fprintf(to, "%s (Enter/./(new name))? ", name); 1307 fclose(to); 1308#else 1309 t = fopen("/dev/tty", "r+"); 1310 if (t == NULL) 1311 return (name); 1312 fprintf(t, "%s (Enter/./(new name))? ", name); 1313 fflush(t); 1314#endif 1315 1316 p = fgets(buff, sizeof(buff), t); 1317 fclose(t); 1318 if (p == NULL) 1319 /* End-of-file is a blank line. */ 1320 return (NULL); 1321 1322 while (*p == ' ' || *p == '\t') 1323 ++p; 1324 if (*p == '\n' || *p == '\0') 1325 /* Empty line. */ 1326 return (NULL); 1327 if (*p == '.' && p[1] == '\n') 1328 /* Single period preserves original name. */ 1329 return (name); 1330 ret = p; 1331 /* Trim the final newline. */ 1332 while (*p != '\0' && *p != '\n') 1333 ++p; 1334 /* Overwrite the final \n with a null character. */ 1335 *p = '\0'; 1336 return (ret); 1337} 1338 1339static void 1340free_cache(struct name_cache *cache) 1341{ 1342 size_t i; 1343 1344 if (cache != NULL) { 1345 for (i = 0; i < cache->size; i++) 1346 free(cache->cache[i].name); 1347 free(cache); 1348 } 1349} 1350 1351/* 1352 * Lookup uname/gname from uid/gid, return NULL if no match. 1353 */ 1354static const char * 1355lookup_name(struct cpio *cpio, struct name_cache **name_cache_variable, 1356 int (*lookup_fn)(struct cpio *, const char **, id_t), id_t id) 1357{ 1358 char asnum[16]; 1359 struct name_cache *cache; 1360 const char *name; 1361 int slot; 1362 1363 1364 if (*name_cache_variable == NULL) { 1365 *name_cache_variable = calloc(1, sizeof(struct name_cache)); 1366 if (*name_cache_variable == NULL) 1367 lafe_errc(1, ENOMEM, "No more memory"); 1368 (*name_cache_variable)->size = name_cache_size; 1369 } 1370 1371 cache = *name_cache_variable; 1372 cache->probes++; 1373 1374 slot = id % cache->size; 1375 if (cache->cache[slot].name != NULL) { 1376 if (cache->cache[slot].id == id) { 1377 cache->hits++; 1378 return (cache->cache[slot].name); 1379 } 1380 free(cache->cache[slot].name); 1381 cache->cache[slot].name = NULL; 1382 } 1383 1384 if (lookup_fn(cpio, &name, id)) { 1385 /* If lookup failed, format it as a number. */ 1386 snprintf(asnum, sizeof(asnum), "%u", (unsigned)id); 1387 name = asnum; 1388 } 1389 1390 cache->cache[slot].name = strdup(name); 1391 if (cache->cache[slot].name != NULL) { 1392 cache->cache[slot].id = id; 1393 return (cache->cache[slot].name); 1394 } 1395 1396 /* 1397 * Conveniently, NULL marks an empty slot, so 1398 * if the strdup() fails, we've just failed to 1399 * cache it. No recovery necessary. 1400 */ 1401 return (NULL); 1402} 1403 1404static const char * 1405lookup_uname(struct cpio *cpio, uid_t uid) 1406{ 1407 return (lookup_name(cpio, &cpio->uname_cache, 1408 &lookup_uname_helper, (id_t)uid)); 1409} 1410 1411static int 1412lookup_uname_helper(struct cpio *cpio, const char **name, id_t id) 1413{ 1414 struct passwd *pwent; 1415 1416 (void)cpio; /* UNUSED */ 1417 1418 errno = 0; 1419 pwent = getpwuid((uid_t)id); 1420 if (pwent == NULL) { 1421 if (errno && errno != ENOENT) 1422 lafe_warnc(errno, "getpwuid(%s) failed", 1423 cpio_i64toa((int64_t)id)); 1424 return 1; 1425 } 1426 1427 *name = pwent->pw_name; 1428 return 0; 1429} 1430 1431static const char * 1432lookup_gname(struct cpio *cpio, gid_t gid) 1433{ 1434 return (lookup_name(cpio, &cpio->gname_cache, 1435 &lookup_gname_helper, (id_t)gid)); 1436} 1437 1438static int 1439lookup_gname_helper(struct cpio *cpio, const char **name, id_t id) 1440{ 1441 struct group *grent; 1442 1443 (void)cpio; /* UNUSED */ 1444 1445 errno = 0; 1446 grent = getgrgid((gid_t)id); 1447 if (grent == NULL) { 1448 if (errno && errno != ENOENT) 1449 lafe_warnc(errno, "getgrgid(%s) failed", 1450 cpio_i64toa((int64_t)id)); 1451 return 1; 1452 } 1453 1454 *name = grent->gr_name; 1455 return 0; 1456} 1457 1458/* 1459 * It would be nice to just use printf() for formatting large numbers, 1460 * but the compatibility problems are a big headache. Hence the 1461 * following simple utility function. 1462 */ 1463const char * 1464cpio_i64toa(int64_t n0) 1465{ 1466 /* 2^64 =~ 1.8 * 10^19, so 20 decimal digits suffice. 1467 * We also need 1 byte for '-' and 1 for '\0'. 1468 */ 1469 static char buff[22]; 1470 int64_t n = n0 < 0 ? -n0 : n0; 1471 char *p = buff + sizeof(buff); 1472 1473 *--p = '\0'; 1474 do { 1475 *--p = '0' + (int)(n % 10); 1476 n /= 10; 1477 } while (n > 0); 1478 if (n0 < 0) 1479 *--p = '-'; 1480 return p; 1481} 1482 1483#define PPBUFF_SIZE 1024 1484static const char * 1485passphrase_callback(struct archive *a, void *_client_data) 1486{ 1487 struct cpio *cpio = (struct cpio *)_client_data; 1488 (void)a; /* UNUSED */ 1489 1490 if (cpio->ppbuff == NULL) { 1491 cpio->ppbuff = malloc(PPBUFF_SIZE); 1492 if (cpio->ppbuff == NULL) 1493 lafe_errc(1, errno, "Out of memory"); 1494 } 1495 return lafe_readpassphrase("Enter passphrase:", 1496 cpio->ppbuff, PPBUFF_SIZE); 1497} 1498 1499static void 1500passphrase_free(char *ppbuff) 1501{ 1502 if (ppbuff != NULL) { 1503 memset(ppbuff, 0, PPBUFF_SIZE); 1504 free(ppbuff); 1505 } 1506} 1507