cpio.c revision 370535
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 370535 2021-09-10 08:34:36Z git2svn $"); 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 '6': /* in/out: assume/create 6th edition (PWB) format */ 196 cpio->option_pwb = 1; 197 break; 198 case '7': /* out: create archive using 7th Edition binary format */ 199 cpio->format = "bin"; 200 break; 201 case 'A': /* NetBSD/OpenBSD */ 202 cpio->option_append = 1; 203 break; 204 case 'a': /* POSIX 1997 */ 205 cpio->option_atime_restore = 1; 206 break; 207 case 'B': /* POSIX 1997 */ 208 cpio->bytes_per_block = 5120; 209 break; 210 case OPTION_B64ENCODE: 211 cpio->add_filter = opt; 212 break; 213 case 'C': /* NetBSD/OpenBSD */ 214 errno = 0; 215 tptr = NULL; 216 t = (int)strtol(cpio->argument, &tptr, 10); 217 if (errno || t <= 0 || *(cpio->argument) == '\0' || 218 tptr == NULL || *tptr != '\0') { 219 lafe_errc(1, 0, "Invalid blocksize: %s", 220 cpio->argument); 221 } 222 cpio->bytes_per_block = t; 223 break; 224 case 'c': /* POSIX 1997 */ 225 cpio->format = "odc"; 226 break; 227 case 'd': /* POSIX 1997 */ 228 cpio->extract_flags &= ~ARCHIVE_EXTRACT_NO_AUTODIR; 229 break; 230 case 'E': /* NetBSD/OpenBSD */ 231 if (archive_match_include_pattern_from_file( 232 cpio->matching, cpio->argument, 233 cpio->option_null) != ARCHIVE_OK) 234 lafe_errc(1, 0, "Error : %s", 235 archive_error_string(cpio->matching)); 236 break; 237 case 'F': /* NetBSD/OpenBSD/GNU cpio */ 238 cpio->filename = cpio->argument; 239 break; 240 case 'f': /* POSIX 1997 */ 241 if (archive_match_exclude_pattern(cpio->matching, 242 cpio->argument) != ARCHIVE_OK) 243 lafe_errc(1, 0, "Error : %s", 244 archive_error_string(cpio->matching)); 245 break; 246 case OPTION_GRZIP: 247 cpio->compress = opt; 248 break; 249 case 'H': /* GNU cpio (also --format) */ 250 cpio->format = cpio->argument; 251 break; 252 case 'h': 253 long_help(); 254 break; 255 case 'I': /* NetBSD/OpenBSD */ 256 cpio->filename = cpio->argument; 257 break; 258 case 'i': /* POSIX 1997 */ 259 if (cpio->mode != '\0') 260 lafe_errc(1, 0, 261 "Cannot use both -i and -%c", cpio->mode); 262 cpio->mode = opt; 263 break; 264 case 'J': /* GNU tar, others */ 265 cpio->compress = opt; 266 break; 267 case 'j': /* GNU tar, others */ 268 cpio->compress = opt; 269 break; 270 case OPTION_INSECURE: 271 cpio->extract_flags &= ~ARCHIVE_EXTRACT_SECURE_SYMLINKS; 272 cpio->extract_flags &= ~ARCHIVE_EXTRACT_SECURE_NODOTDOT; 273 cpio->extract_flags &= ~ARCHIVE_EXTRACT_SECURE_NOABSOLUTEPATHS; 274 break; 275 case 'L': /* GNU cpio */ 276 cpio->option_follow_links = 1; 277 break; 278 case 'l': /* POSIX 1997 */ 279 cpio->option_link = 1; 280 break; 281 case OPTION_LRZIP: 282 case OPTION_LZ4: 283 case OPTION_LZMA: /* GNU tar, others */ 284 case OPTION_LZOP: /* GNU tar, others */ 285 case OPTION_ZSTD: 286 cpio->compress = opt; 287 break; 288 case 'm': /* POSIX 1997 */ 289 cpio->extract_flags |= ARCHIVE_EXTRACT_TIME; 290 break; 291 case 'n': /* GNU cpio */ 292 cpio->option_numeric_uid_gid = 1; 293 break; 294 case OPTION_NO_PRESERVE_OWNER: /* GNU cpio */ 295 cpio->extract_flags &= ~ARCHIVE_EXTRACT_OWNER; 296 break; 297 case 'O': /* GNU cpio */ 298 cpio->filename = cpio->argument; 299 break; 300 case 'o': /* POSIX 1997 */ 301 if (cpio->mode != '\0') 302 lafe_errc(1, 0, 303 "Cannot use both -o and -%c", cpio->mode); 304 cpio->mode = opt; 305 break; 306 case 'p': /* POSIX 1997 */ 307 if (cpio->mode != '\0') 308 lafe_errc(1, 0, 309 "Cannot use both -p and -%c", cpio->mode); 310 cpio->mode = opt; 311 cpio->extract_flags &= ~ARCHIVE_EXTRACT_SECURE_NODOTDOT; 312 cpio->extract_flags &= ~ARCHIVE_EXTRACT_SECURE_NOABSOLUTEPATHS; 313 break; 314 case OPTION_PASSPHRASE: 315 cpio->passphrase = cpio->argument; 316 break; 317 case OPTION_PRESERVE_OWNER: 318 cpio->extract_flags |= ARCHIVE_EXTRACT_OWNER; 319 break; 320 case OPTION_QUIET: /* GNU cpio */ 321 cpio->quiet = 1; 322 break; 323 case 'R': /* GNU cpio, also --owner */ 324 /* TODO: owner_parse should return uname/gname 325 * also; use that to set [ug]name_override. */ 326 errmsg = owner_parse(cpio->argument, &uid, &gid); 327 if (errmsg) { 328 lafe_warnc(-1, "%s", errmsg); 329 usage(); 330 } 331 if (uid != -1) { 332 cpio->uid_override = uid; 333 cpio->uname_override = NULL; 334 } 335 if (gid != -1) { 336 cpio->gid_override = gid; 337 cpio->gname_override = NULL; 338 } 339 break; 340 case 'r': /* POSIX 1997 */ 341 cpio->option_rename = 1; 342 break; 343 case 't': /* POSIX 1997 */ 344 cpio->option_list = 1; 345 break; 346 case 'u': /* POSIX 1997 */ 347 cpio->extract_flags 348 &= ~ARCHIVE_EXTRACT_NO_OVERWRITE_NEWER; 349 break; 350 case OPTION_UUENCODE: 351 cpio->add_filter = opt; 352 break; 353 case 'v': /* POSIX 1997 */ 354 cpio->verbose++; 355 break; 356 case 'V': /* GNU cpio */ 357 cpio->dot++; 358 break; 359 case OPTION_VERSION: /* GNU convention */ 360 version(); 361 break; 362#if 0 363 /* 364 * cpio_getopt() handles -W specially, so it's not 365 * available here. 366 */ 367 case 'W': /* Obscure, but useful GNU convention. */ 368 break; 369#endif 370 case 'y': /* tar convention */ 371 cpio->compress = opt; 372 break; 373 case 'Z': /* tar convention */ 374 cpio->compress = opt; 375 break; 376 case 'z': /* tar convention */ 377 cpio->compress = opt; 378 break; 379 default: 380 usage(); 381 } 382 } 383 384 /* 385 * Sanity-check args, error out on nonsensical combinations. 386 */ 387 /* -t implies -i if no mode was specified. */ 388 if (cpio->option_list && cpio->mode == '\0') 389 cpio->mode = 'i'; 390 /* -t requires -i */ 391 if (cpio->option_list && cpio->mode != 'i') 392 lafe_errc(1, 0, "Option -t requires -i"); 393 /* -n requires -it */ 394 if (cpio->option_numeric_uid_gid && !cpio->option_list) 395 lafe_errc(1, 0, "Option -n requires -it"); 396 /* Can only specify format when writing */ 397 if (cpio->format != NULL && cpio->mode != 'o') 398 lafe_errc(1, 0, "Option --format requires -o"); 399 /* -l requires -p */ 400 if (cpio->option_link && cpio->mode != 'p') 401 lafe_errc(1, 0, "Option -l requires -p"); 402 /* -v overrides -V */ 403 if (cpio->dot && cpio->verbose) 404 cpio->dot = 0; 405 /* TODO: Flag other nonsensical combinations. */ 406 407 switch (cpio->mode) { 408 case 'o': 409 if (cpio->format == NULL) { 410 if (cpio->option_pwb) 411 cpio->format = "pwb"; 412 else 413 cpio->format = "cpio"; 414 } 415 mode_out(cpio); 416 break; 417 case 'i': 418 while (*cpio->argv != NULL) { 419 if (archive_match_include_pattern(cpio->matching, 420 *cpio->argv) != ARCHIVE_OK) 421 lafe_errc(1, 0, "Error : %s", 422 archive_error_string(cpio->matching)); 423 --cpio->argc; 424 ++cpio->argv; 425 } 426 if (cpio->option_list) 427 mode_list(cpio); 428 else 429 mode_in(cpio); 430 break; 431 case 'p': 432 if (*cpio->argv == NULL || **cpio->argv == '\0') 433 lafe_errc(1, 0, 434 "-p mode requires a target directory"); 435 mode_pass(cpio, *cpio->argv); 436 break; 437 default: 438 lafe_errc(1, 0, 439 "Must specify at least one of -i, -o, or -p"); 440 } 441 442 archive_match_free(cpio->matching); 443 free_cache(cpio->gname_cache); 444 free_cache(cpio->uname_cache); 445 free(cpio->destdir); 446 passphrase_free(cpio->ppbuff); 447 return (cpio->return_value); 448} 449 450static void 451usage(void) 452{ 453 const char *p; 454 455 p = lafe_getprogname(); 456 457 fprintf(stderr, "Brief Usage:\n"); 458 fprintf(stderr, " List: %s -it < archive\n", p); 459 fprintf(stderr, " Extract: %s -i < archive\n", p); 460 fprintf(stderr, " Create: %s -o < filenames > archive\n", p); 461 fprintf(stderr, " Help: %s --help\n", p); 462 exit(1); 463} 464 465static const char *long_help_msg = 466 "First option must be a mode specifier:\n" 467 " -i Input -o Output -p Pass\n" 468 "Common Options:\n" 469 " -v Verbose filenames -V one dot per file\n" 470 "Create: %p -o [options] < [list of files] > [archive]\n" 471 " -J,-y,-z,--lzma Compress archive with xz/bzip2/gzip/lzma\n" 472 " --format {pwb|bin|odc|newc|ustar} Select archive format\n" 473 "List: %p -it < [archive]\n" 474 "Extract: %p -i [options] < [archive]\n"; 475 476 477/* 478 * Note that the word 'bsdcpio' will always appear in the first line 479 * of output. 480 * 481 * In particular, /bin/sh scripts that need to test for the presence 482 * of bsdcpio can use the following template: 483 * 484 * if (cpio --help 2>&1 | grep bsdcpio >/dev/null 2>&1 ) then \ 485 * echo bsdcpio; else echo not bsdcpio; fi 486 */ 487static void 488long_help(void) 489{ 490 const char *prog; 491 const char *p; 492 493 prog = lafe_getprogname(); 494 495 fflush(stderr); 496 497 p = (strcmp(prog,"bsdcpio") != 0) ? "(bsdcpio)" : ""; 498 printf("%s%s: manipulate archive files\n", prog, p); 499 500 for (p = long_help_msg; *p != '\0'; p++) { 501 if (*p == '%') { 502 if (p[1] == 'p') { 503 fputs(prog, stdout); 504 p++; 505 } else 506 putchar('%'); 507 } else 508 putchar(*p); 509 } 510 version(); 511} 512 513static void 514version(void) 515{ 516 fprintf(stdout,"bsdcpio %s - %s \n", 517 BSDCPIO_VERSION_STRING, 518 archive_version_details()); 519 exit(0); 520} 521 522static void 523mode_out(struct cpio *cpio) 524{ 525 struct archive_entry *entry, *spare; 526 struct lafe_line_reader *lr; 527 const char *p; 528 int r; 529 530 if (cpio->option_append) 531 lafe_errc(1, 0, "Append mode not yet supported."); 532 533 cpio->archive_read_disk = archive_read_disk_new(); 534 if (cpio->archive_read_disk == NULL) 535 lafe_errc(1, 0, "Failed to allocate archive object"); 536 if (cpio->option_follow_links) 537 archive_read_disk_set_symlink_logical(cpio->archive_read_disk); 538 else 539 archive_read_disk_set_symlink_physical(cpio->archive_read_disk); 540 archive_read_disk_set_standard_lookup(cpio->archive_read_disk); 541 542 cpio->archive = archive_write_new(); 543 if (cpio->archive == NULL) 544 lafe_errc(1, 0, "Failed to allocate archive object"); 545 switch (cpio->compress) { 546 case OPTION_GRZIP: 547 r = archive_write_add_filter_grzip(cpio->archive); 548 break; 549 case 'J': 550 r = archive_write_add_filter_xz(cpio->archive); 551 break; 552 case OPTION_LRZIP: 553 r = archive_write_add_filter_lrzip(cpio->archive); 554 break; 555 case OPTION_LZ4: 556 r = archive_write_add_filter_lz4(cpio->archive); 557 break; 558 case OPTION_LZMA: 559 r = archive_write_add_filter_lzma(cpio->archive); 560 break; 561 case OPTION_LZOP: 562 r = archive_write_add_filter_lzop(cpio->archive); 563 break; 564 case OPTION_ZSTD: 565 r = archive_write_add_filter_zstd(cpio->archive); 566 break; 567 case 'j': case 'y': 568 r = archive_write_add_filter_bzip2(cpio->archive); 569 break; 570 case 'z': 571 r = archive_write_add_filter_gzip(cpio->archive); 572 break; 573 case 'Z': 574 r = archive_write_add_filter_compress(cpio->archive); 575 break; 576 default: 577 r = archive_write_add_filter_none(cpio->archive); 578 break; 579 } 580 if (r < ARCHIVE_WARN) 581 lafe_errc(1, 0, "Requested compression not available"); 582 switch (cpio->add_filter) { 583 case 0: 584 r = ARCHIVE_OK; 585 break; 586 case OPTION_B64ENCODE: 587 r = archive_write_add_filter_b64encode(cpio->archive); 588 break; 589 case OPTION_UUENCODE: 590 r = archive_write_add_filter_uuencode(cpio->archive); 591 break; 592 } 593 if (r < ARCHIVE_WARN) 594 lafe_errc(1, 0, "Requested filter not available"); 595 r = archive_write_set_format_by_name(cpio->archive, cpio->format); 596 if (r != ARCHIVE_OK) 597 lafe_errc(1, 0, "%s", archive_error_string(cpio->archive)); 598 archive_write_set_bytes_per_block(cpio->archive, cpio->bytes_per_block); 599 cpio->linkresolver = archive_entry_linkresolver_new(); 600 archive_entry_linkresolver_set_strategy(cpio->linkresolver, 601 archive_format(cpio->archive)); 602 if (cpio->passphrase != NULL) 603 r = archive_write_set_passphrase(cpio->archive, 604 cpio->passphrase); 605 else 606 r = archive_write_set_passphrase_callback(cpio->archive, cpio, 607 &passphrase_callback); 608 if (r != ARCHIVE_OK) 609 lafe_errc(1, 0, "%s", archive_error_string(cpio->archive)); 610 611 /* 612 * The main loop: Copy each file into the output archive. 613 */ 614 r = archive_write_open_filename(cpio->archive, cpio->filename); 615 if (r != ARCHIVE_OK) 616 lafe_errc(1, 0, "%s", archive_error_string(cpio->archive)); 617 lr = lafe_line_reader("-", cpio->option_null); 618 while ((p = lafe_line_reader_next(lr)) != NULL) 619 file_to_archive(cpio, p); 620 lafe_line_reader_free(lr); 621 622 /* 623 * The hardlink detection may have queued up a couple of entries 624 * that can now be flushed. 625 */ 626 entry = NULL; 627 archive_entry_linkify(cpio->linkresolver, &entry, &spare); 628 while (entry != NULL) { 629 entry_to_archive(cpio, entry); 630 archive_entry_free(entry); 631 entry = NULL; 632 archive_entry_linkify(cpio->linkresolver, &entry, &spare); 633 } 634 635 r = archive_write_close(cpio->archive); 636 if (cpio->dot) 637 fprintf(stderr, "\n"); 638 if (r != ARCHIVE_OK) 639 lafe_errc(1, 0, "%s", archive_error_string(cpio->archive)); 640 641 if (!cpio->quiet) { 642 int64_t blocks = 643 (archive_filter_bytes(cpio->archive, 0) + 511) 644 / 512; 645 fprintf(stderr, "%lu %s\n", (unsigned long)blocks, 646 blocks == 1 ? "block" : "blocks"); 647 } 648 archive_write_free(cpio->archive); 649 archive_entry_linkresolver_free(cpio->linkresolver); 650} 651 652static const char * 653remove_leading_slash(const char *p) 654{ 655 const char *rp; 656 657 /* Remove leading "//./" or "//?/" or "//?/UNC/" 658 * (absolute path prefixes used by Windows API) */ 659 if ((p[0] == '/' || p[0] == '\\') && 660 (p[1] == '/' || p[1] == '\\') && 661 (p[2] == '.' || p[2] == '?') && 662 (p[3] == '/' || p[3] == '\\')) 663 { 664 if (p[2] == '?' && 665 (p[4] == 'U' || p[4] == 'u') && 666 (p[5] == 'N' || p[5] == 'n') && 667 (p[6] == 'C' || p[6] == 'c') && 668 (p[7] == '/' || p[7] == '\\')) 669 p += 8; 670 else 671 p += 4; 672 } 673 do { 674 rp = p; 675 /* Remove leading drive letter from archives created 676 * on Windows. */ 677 if (((p[0] >= 'a' && p[0] <= 'z') || 678 (p[0] >= 'A' && p[0] <= 'Z')) && 679 p[1] == ':') { 680 p += 2; 681 } 682 /* Remove leading "/../", "//", etc. */ 683 while (p[0] == '/' || p[0] == '\\') { 684 if (p[1] == '.' && p[2] == '.' && 685 (p[3] == '/' || p[3] == '\\')) { 686 p += 3; /* Remove "/..", leave "/" 687 * for next pass. */ 688 } else 689 p += 1; /* Remove "/". */ 690 } 691 } while (rp != p); 692 return (p); 693} 694 695/* 696 * This is used by both out mode (to copy objects from disk into 697 * an archive) and pass mode (to copy objects from disk to 698 * an archive_write_disk "archive"). 699 */ 700static int 701file_to_archive(struct cpio *cpio, const char *srcpath) 702{ 703 const char *destpath; 704 struct archive_entry *entry, *spare; 705 size_t len; 706 int r; 707 708 /* 709 * Create an archive_entry describing the source file. 710 * 711 */ 712 entry = archive_entry_new(); 713 if (entry == NULL) 714 lafe_errc(1, 0, "Couldn't allocate entry"); 715 archive_entry_copy_sourcepath(entry, srcpath); 716 r = archive_read_disk_entry_from_file(cpio->archive_read_disk, 717 entry, -1, NULL); 718 if (r < ARCHIVE_FAILED) 719 lafe_errc(1, 0, "%s", 720 archive_error_string(cpio->archive_read_disk)); 721 if (r < ARCHIVE_OK) 722 lafe_warnc(0, "%s", 723 archive_error_string(cpio->archive_read_disk)); 724 if (r <= ARCHIVE_FAILED) { 725 archive_entry_free(entry); 726 cpio->return_value = 1; 727 return (r); 728 } 729 730 if (cpio->uid_override >= 0) { 731 archive_entry_set_uid(entry, cpio->uid_override); 732 archive_entry_set_uname(entry, cpio->uname_override); 733 } 734 if (cpio->gid_override >= 0) { 735 archive_entry_set_gid(entry, cpio->gid_override); 736 archive_entry_set_gname(entry, cpio->gname_override); 737 } 738 739 /* 740 * Generate a destination path for this entry. 741 * "destination path" is the name to which it will be copied in 742 * pass mode or the name that will go into the archive in 743 * output mode. 744 */ 745 destpath = srcpath; 746 if (cpio->destdir) { 747 len = cpio->destdir_len + strlen(srcpath) + 8; 748 if (len >= cpio->pass_destpath_alloc) { 749 while (len >= cpio->pass_destpath_alloc) { 750 cpio->pass_destpath_alloc += 512; 751 cpio->pass_destpath_alloc *= 2; 752 } 753 free(cpio->pass_destpath); 754 cpio->pass_destpath = malloc(cpio->pass_destpath_alloc); 755 if (cpio->pass_destpath == NULL) 756 lafe_errc(1, ENOMEM, 757 "Can't allocate path buffer"); 758 } 759 strcpy(cpio->pass_destpath, cpio->destdir); 760 strcat(cpio->pass_destpath, remove_leading_slash(srcpath)); 761 destpath = cpio->pass_destpath; 762 } 763 if (cpio->option_rename) 764 destpath = cpio_rename(destpath); 765 if (destpath == NULL) { 766 archive_entry_free(entry); 767 return (0); 768 } 769 archive_entry_copy_pathname(entry, destpath); 770 771 /* 772 * If we're trying to preserve hardlinks, match them here. 773 */ 774 spare = NULL; 775 if (cpio->linkresolver != NULL 776 && archive_entry_filetype(entry) != AE_IFDIR) { 777 archive_entry_linkify(cpio->linkresolver, &entry, &spare); 778 } 779 780 if (entry != NULL) { 781 r = entry_to_archive(cpio, entry); 782 archive_entry_free(entry); 783 if (spare != NULL) { 784 if (r == 0) 785 r = entry_to_archive(cpio, spare); 786 archive_entry_free(spare); 787 } 788 } 789 return (r); 790} 791 792static int 793entry_to_archive(struct cpio *cpio, struct archive_entry *entry) 794{ 795 const char *destpath = archive_entry_pathname(entry); 796 const char *srcpath = archive_entry_sourcepath(entry); 797 int fd = -1; 798 ssize_t bytes_read; 799 int r; 800 801 /* Print out the destination name to the user. */ 802 if (cpio->verbose) 803 fprintf(stderr,"%s", destpath); 804 if (cpio->dot) 805 fprintf(stderr, "."); 806 807 /* 808 * Option_link only makes sense in pass mode and for 809 * regular files. Also note: if a link operation fails 810 * because of cross-device restrictions, we'll fall back 811 * to copy mode for that entry. 812 * 813 * TODO: Test other cpio implementations to see if they 814 * hard-link anything other than regular files here. 815 */ 816 if (cpio->option_link 817 && archive_entry_filetype(entry) == AE_IFREG) 818 { 819 struct archive_entry *t; 820 /* Save the original entry in case we need it later. */ 821 t = archive_entry_clone(entry); 822 if (t == NULL) 823 lafe_errc(1, ENOMEM, "Can't create link"); 824 /* Note: link(2) doesn't create parent directories, 825 * so we use archive_write_header() instead as a 826 * convenience. */ 827 archive_entry_set_hardlink(t, srcpath); 828 /* This is a straight link that carries no data. */ 829 archive_entry_set_size(t, 0); 830 r = archive_write_header(cpio->archive, t); 831 archive_entry_free(t); 832 if (r != ARCHIVE_OK) 833 lafe_warnc(archive_errno(cpio->archive), 834 "%s", archive_error_string(cpio->archive)); 835 if (r == ARCHIVE_FATAL) 836 exit(1); 837#ifdef EXDEV 838 if (r != ARCHIVE_OK && archive_errno(cpio->archive) == EXDEV) { 839 /* Cross-device link: Just fall through and use 840 * the original entry to copy the file over. */ 841 lafe_warnc(0, "Copying file instead"); 842 } else 843#endif 844 return (0); 845 } 846 847 /* 848 * Make sure we can open the file (if necessary) before 849 * trying to write the header. 850 */ 851 if (archive_entry_filetype(entry) == AE_IFREG) { 852 if (archive_entry_size(entry) > 0) { 853 fd = open(srcpath, O_RDONLY | O_BINARY); 854 if (fd < 0) { 855 lafe_warnc(errno, 856 "%s: could not open file", srcpath); 857 goto cleanup; 858 } 859 } 860 } else { 861 archive_entry_set_size(entry, 0); 862 } 863 864 r = archive_write_header(cpio->archive, entry); 865 866 if (r != ARCHIVE_OK) 867 lafe_warnc(archive_errno(cpio->archive), 868 "%s: %s", 869 srcpath, 870 archive_error_string(cpio->archive)); 871 872 if (r == ARCHIVE_FATAL) 873 exit(1); 874 875 if (r >= ARCHIVE_WARN && archive_entry_size(entry) > 0 && fd >= 0) { 876 bytes_read = read(fd, cpio->buff, (unsigned)cpio->buff_size); 877 while (bytes_read > 0) { 878 ssize_t bytes_write; 879 bytes_write = archive_write_data(cpio->archive, 880 cpio->buff, bytes_read); 881 if (bytes_write < 0) 882 lafe_errc(1, archive_errno(cpio->archive), 883 "%s", archive_error_string(cpio->archive)); 884 if (bytes_write < bytes_read) { 885 lafe_warnc(0, 886 "Truncated write; file may have " 887 "grown while being archived."); 888 } 889 bytes_read = read(fd, cpio->buff, 890 (unsigned)cpio->buff_size); 891 } 892 } 893 894 fd = restore_time(cpio, entry, srcpath, fd); 895 896cleanup: 897 if (cpio->verbose) 898 fprintf(stderr,"\n"); 899 if (fd >= 0) 900 close(fd); 901 return (0); 902} 903 904static int 905restore_time(struct cpio *cpio, struct archive_entry *entry, 906 const char *name, int fd) 907{ 908#ifndef HAVE_UTIMES 909 static int warned = 0; 910 911 (void)cpio; /* UNUSED */ 912 (void)entry; /* UNUSED */ 913 (void)name; /* UNUSED */ 914 915 if (!warned) 916 lafe_warnc(0, "Can't restore access times on this platform"); 917 warned = 1; 918 return (fd); 919#else 920#if defined(_WIN32) && !defined(__CYGWIN__) 921 struct __timeval times[2]; 922#else 923 struct timeval times[2]; 924#endif 925 926 if (!cpio->option_atime_restore) 927 return (fd); 928 929 times[1].tv_sec = archive_entry_mtime(entry); 930 times[1].tv_usec = archive_entry_mtime_nsec(entry) / 1000; 931 932 times[0].tv_sec = archive_entry_atime(entry); 933 times[0].tv_usec = archive_entry_atime_nsec(entry) / 1000; 934 935#if defined(HAVE_FUTIMES) && !defined(__CYGWIN__) 936 if (fd >= 0 && futimes(fd, times) == 0) 937 return (fd); 938#endif 939 /* 940 * Some platform cannot restore access times if the file descriptor 941 * is still opened. 942 */ 943 if (fd >= 0) { 944 close(fd); 945 fd = -1; 946 } 947 948#ifdef HAVE_LUTIMES 949 if (lutimes(name, times) != 0) 950#else 951 if ((AE_IFLNK != archive_entry_filetype(entry)) 952 && utimes(name, times) != 0) 953#endif 954 lafe_warnc(errno, "Can't update time for %s", name); 955#endif 956 return (fd); 957} 958 959 960static void 961mode_in(struct cpio *cpio) 962{ 963 struct archive *a; 964 struct archive_entry *entry; 965 struct archive *ext; 966 const char *destpath; 967 int r; 968 969 ext = archive_write_disk_new(); 970 if (ext == NULL) 971 lafe_errc(1, 0, "Couldn't allocate restore object"); 972 r = archive_write_disk_set_options(ext, cpio->extract_flags); 973 if (r != ARCHIVE_OK) 974 lafe_errc(1, 0, "%s", archive_error_string(ext)); 975 a = archive_read_new(); 976 if (a == NULL) 977 lafe_errc(1, 0, "Couldn't allocate archive object"); 978 archive_read_support_filter_all(a); 979 archive_read_support_format_all(a); 980 if (cpio->option_pwb) 981 archive_read_set_options(a, "pwb"); 982 if (cpio->passphrase != NULL) 983 r = archive_read_add_passphrase(a, cpio->passphrase); 984 else 985 r = archive_read_set_passphrase_callback(a, cpio, 986 &passphrase_callback); 987 if (r != ARCHIVE_OK) 988 lafe_errc(1, 0, "%s", archive_error_string(a)); 989 990 if (archive_read_open_filename(a, cpio->filename, 991 cpio->bytes_per_block)) 992 lafe_errc(1, archive_errno(a), 993 "%s", archive_error_string(a)); 994 for (;;) { 995 r = archive_read_next_header(a, &entry); 996 if (r == ARCHIVE_EOF) 997 break; 998 if (r != ARCHIVE_OK) { 999 lafe_errc(1, archive_errno(a), 1000 "%s", archive_error_string(a)); 1001 } 1002 if (archive_match_path_excluded(cpio->matching, entry)) 1003 continue; 1004 if (cpio->option_rename) { 1005 destpath = cpio_rename(archive_entry_pathname(entry)); 1006 archive_entry_set_pathname(entry, destpath); 1007 } else 1008 destpath = archive_entry_pathname(entry); 1009 if (destpath == NULL) 1010 continue; 1011 if (cpio->verbose) 1012 fprintf(stderr, "%s\n", destpath); 1013 if (cpio->dot) 1014 fprintf(stderr, "."); 1015 if (cpio->uid_override >= 0) 1016 archive_entry_set_uid(entry, cpio->uid_override); 1017 if (cpio->gid_override >= 0) 1018 archive_entry_set_gid(entry, cpio->gid_override); 1019 r = archive_write_header(ext, entry); 1020 if (r != ARCHIVE_OK) { 1021 fprintf(stderr, "%s: %s\n", 1022 archive_entry_pathname(entry), 1023 archive_error_string(ext)); 1024 } else if (!archive_entry_size_is_set(entry) 1025 || archive_entry_size(entry) > 0) { 1026 r = extract_data(a, ext); 1027 if (r != ARCHIVE_OK) 1028 cpio->return_value = 1; 1029 } 1030 } 1031 r = archive_read_close(a); 1032 if (cpio->dot) 1033 fprintf(stderr, "\n"); 1034 if (r != ARCHIVE_OK) 1035 lafe_errc(1, 0, "%s", archive_error_string(a)); 1036 r = archive_write_close(ext); 1037 if (r != ARCHIVE_OK) 1038 lafe_errc(1, 0, "%s", archive_error_string(ext)); 1039 if (!cpio->quiet) { 1040 int64_t blocks = (archive_filter_bytes(a, 0) + 511) 1041 / 512; 1042 fprintf(stderr, "%lu %s\n", (unsigned long)blocks, 1043 blocks == 1 ? "block" : "blocks"); 1044 } 1045 archive_read_free(a); 1046 archive_write_free(ext); 1047 exit(cpio->return_value); 1048} 1049 1050/* 1051 * Exits if there's a fatal error. Returns ARCHIVE_OK 1052 * if everything is kosher. 1053 */ 1054static int 1055extract_data(struct archive *ar, struct archive *aw) 1056{ 1057 int r; 1058 size_t size; 1059 const void *block; 1060 int64_t offset; 1061 1062 for (;;) { 1063 r = archive_read_data_block(ar, &block, &size, &offset); 1064 if (r == ARCHIVE_EOF) 1065 return (ARCHIVE_OK); 1066 if (r != ARCHIVE_OK) { 1067 lafe_warnc(archive_errno(ar), 1068 "%s", archive_error_string(ar)); 1069 exit(1); 1070 } 1071 r = (int)archive_write_data_block(aw, block, size, offset); 1072 if (r != ARCHIVE_OK) { 1073 lafe_warnc(archive_errno(aw), 1074 "%s", archive_error_string(aw)); 1075 return (r); 1076 } 1077 } 1078} 1079 1080static void 1081mode_list(struct cpio *cpio) 1082{ 1083 struct archive *a; 1084 struct archive_entry *entry; 1085 int r; 1086 1087 a = archive_read_new(); 1088 if (a == NULL) 1089 lafe_errc(1, 0, "Couldn't allocate archive object"); 1090 archive_read_support_filter_all(a); 1091 archive_read_support_format_all(a); 1092 if (cpio->option_pwb) 1093 archive_read_set_options(a, "pwb"); 1094 if (cpio->passphrase != NULL) 1095 r = archive_read_add_passphrase(a, cpio->passphrase); 1096 else 1097 r = archive_read_set_passphrase_callback(a, cpio, 1098 &passphrase_callback); 1099 if (r != ARCHIVE_OK) 1100 lafe_errc(1, 0, "%s", archive_error_string(a)); 1101 1102 if (archive_read_open_filename(a, cpio->filename, 1103 cpio->bytes_per_block)) 1104 lafe_errc(1, archive_errno(a), 1105 "%s", archive_error_string(a)); 1106 for (;;) { 1107 r = archive_read_next_header(a, &entry); 1108 if (r == ARCHIVE_EOF) 1109 break; 1110 if (r != ARCHIVE_OK) { 1111 lafe_errc(1, archive_errno(a), 1112 "%s", archive_error_string(a)); 1113 } 1114 if (archive_match_path_excluded(cpio->matching, entry)) 1115 continue; 1116 if (cpio->verbose) 1117 list_item_verbose(cpio, entry); 1118 else 1119 fprintf(stdout, "%s\n", archive_entry_pathname(entry)); 1120 } 1121 r = archive_read_close(a); 1122 if (r != ARCHIVE_OK) 1123 lafe_errc(1, 0, "%s", archive_error_string(a)); 1124 if (!cpio->quiet) { 1125 int64_t blocks = (archive_filter_bytes(a, 0) + 511) 1126 / 512; 1127 fprintf(stderr, "%lu %s\n", (unsigned long)blocks, 1128 blocks == 1 ? "block" : "blocks"); 1129 } 1130 archive_read_free(a); 1131 exit(0); 1132} 1133 1134/* 1135 * Display information about the current file. 1136 * 1137 * The format here roughly duplicates the output of 'ls -l'. 1138 * This is based on SUSv2, where 'tar tv' is documented as 1139 * listing additional information in an "unspecified format," 1140 * and 'pax -l' is documented as using the same format as 'ls -l'. 1141 */ 1142static void 1143list_item_verbose(struct cpio *cpio, struct archive_entry *entry) 1144{ 1145 char size[32]; 1146 char date[32]; 1147 char uids[16], gids[16]; 1148 const char *uname, *gname; 1149 FILE *out = stdout; 1150 const char *fmt; 1151 time_t mtime; 1152 static time_t now; 1153 struct tm *ltime; 1154#if defined(HAVE_LOCALTIME_R) || defined(HAVE__LOCALTIME64_S) 1155 struct tm tmbuf; 1156#endif 1157#if defined(HAVE__LOCALTIME64_S) 1158 errno_t terr; 1159 __time64_t tmptime; 1160#endif 1161 1162 if (!now) 1163 time(&now); 1164 1165 if (cpio->option_numeric_uid_gid) { 1166 /* Format numeric uid/gid for display. */ 1167 strcpy(uids, cpio_i64toa(archive_entry_uid(entry))); 1168 uname = uids; 1169 strcpy(gids, cpio_i64toa(archive_entry_gid(entry))); 1170 gname = gids; 1171 } else { 1172 /* Use uname if it's present, else lookup name from uid. */ 1173 uname = archive_entry_uname(entry); 1174 if (uname == NULL) 1175 uname = lookup_uname(cpio, (uid_t)archive_entry_uid(entry)); 1176 /* Use gname if it's present, else lookup name from gid. */ 1177 gname = archive_entry_gname(entry); 1178 if (gname == NULL) 1179 gname = lookup_gname(cpio, (uid_t)archive_entry_gid(entry)); 1180 } 1181 1182 /* Print device number or file size. */ 1183 if (archive_entry_filetype(entry) == AE_IFCHR 1184 || archive_entry_filetype(entry) == AE_IFBLK) { 1185 snprintf(size, sizeof(size), "%lu,%lu", 1186 (unsigned long)archive_entry_rdevmajor(entry), 1187 (unsigned long)archive_entry_rdevminor(entry)); 1188 } else { 1189 strcpy(size, cpio_i64toa(archive_entry_size(entry))); 1190 } 1191 1192 /* Format the time using 'ls -l' conventions. */ 1193 mtime = archive_entry_mtime(entry); 1194#if defined(_WIN32) && !defined(__CYGWIN__) 1195 /* Windows' strftime function does not support %e format. */ 1196 if (mtime - now > 365*86400/2 1197 || mtime - now < -365*86400/2) 1198 fmt = cpio->day_first ? "%d %b %Y" : "%b %d %Y"; 1199 else 1200 fmt = cpio->day_first ? "%d %b %H:%M" : "%b %d %H:%M"; 1201#else 1202 if (mtime - now > 365*86400/2 1203 || mtime - now < -365*86400/2) 1204 fmt = cpio->day_first ? "%e %b %Y" : "%b %e %Y"; 1205 else 1206 fmt = cpio->day_first ? "%e %b %H:%M" : "%b %e %H:%M"; 1207#endif 1208#if defined(HAVE_LOCALTIME_R) 1209 ltime = localtime_r(&mtime, &tmbuf); 1210#elif defined(HAVE__LOCALTIME64_S) 1211 tmptime = mtime; 1212 terr = _localtime64_s(&tmbuf, &tmptime); 1213 if (terr) 1214 ltime = NULL; 1215 else 1216 ltime = &tmbuf; 1217#else 1218 ltime = localtime(&mtime); 1219#endif 1220 strftime(date, sizeof(date), fmt, ltime); 1221 1222 fprintf(out, "%s%3d %-8s %-8s %8s %12s %s", 1223 archive_entry_strmode(entry), 1224 archive_entry_nlink(entry), 1225 uname, gname, size, date, 1226 archive_entry_pathname(entry)); 1227 1228 /* Extra information for links. */ 1229 if (archive_entry_hardlink(entry)) /* Hard link */ 1230 fprintf(out, " link to %s", archive_entry_hardlink(entry)); 1231 else if (archive_entry_symlink(entry)) /* Symbolic link */ 1232 fprintf(out, " -> %s", archive_entry_symlink(entry)); 1233 fprintf(out, "\n"); 1234} 1235 1236static void 1237mode_pass(struct cpio *cpio, const char *destdir) 1238{ 1239 struct lafe_line_reader *lr; 1240 const char *p; 1241 int r; 1242 1243 /* Ensure target dir has a trailing '/' to simplify path surgery. */ 1244 cpio->destdir_len = strlen(destdir); 1245 cpio->destdir = malloc(cpio->destdir_len + 8); 1246 memcpy(cpio->destdir, destdir, cpio->destdir_len); 1247 if (cpio->destdir_len == 0 || destdir[cpio->destdir_len - 1] != '/') 1248 cpio->destdir[cpio->destdir_len++] = '/'; 1249 cpio->destdir[cpio->destdir_len] = '\0'; 1250 1251 cpio->archive = archive_write_disk_new(); 1252 if (cpio->archive == NULL) 1253 lafe_errc(1, 0, "Failed to allocate archive object"); 1254 r = archive_write_disk_set_options(cpio->archive, cpio->extract_flags); 1255 if (r != ARCHIVE_OK) 1256 lafe_errc(1, 0, "%s", archive_error_string(cpio->archive)); 1257 cpio->linkresolver = archive_entry_linkresolver_new(); 1258 archive_write_disk_set_standard_lookup(cpio->archive); 1259 1260 cpio->archive_read_disk = archive_read_disk_new(); 1261 if (cpio->archive_read_disk == NULL) 1262 lafe_errc(1, 0, "Failed to allocate archive object"); 1263 if (cpio->option_follow_links) 1264 archive_read_disk_set_symlink_logical(cpio->archive_read_disk); 1265 else 1266 archive_read_disk_set_symlink_physical(cpio->archive_read_disk); 1267 archive_read_disk_set_standard_lookup(cpio->archive_read_disk); 1268 1269 lr = lafe_line_reader("-", cpio->option_null); 1270 while ((p = lafe_line_reader_next(lr)) != NULL) 1271 file_to_archive(cpio, p); 1272 lafe_line_reader_free(lr); 1273 1274 archive_entry_linkresolver_free(cpio->linkresolver); 1275 r = archive_write_close(cpio->archive); 1276 if (cpio->dot) 1277 fprintf(stderr, "\n"); 1278 if (r != ARCHIVE_OK) 1279 lafe_errc(1, 0, "%s", archive_error_string(cpio->archive)); 1280 1281 if (!cpio->quiet) { 1282 int64_t blocks = 1283 (archive_filter_bytes(cpio->archive, 0) + 511) 1284 / 512; 1285 fprintf(stderr, "%lu %s\n", (unsigned long)blocks, 1286 blocks == 1 ? "block" : "blocks"); 1287 } 1288 1289 archive_write_free(cpio->archive); 1290 free(cpio->pass_destpath); 1291} 1292 1293/* 1294 * Prompt for a new name for this entry. Returns a pointer to the 1295 * new name or NULL if the entry should not be copied. This 1296 * implements the semantics defined in POSIX.1-1996, which specifies 1297 * that an input of '.' means the name should be unchanged. GNU cpio 1298 * treats '.' as a literal new name. 1299 */ 1300static const char * 1301cpio_rename(const char *name) 1302{ 1303 static char buff[1024]; 1304 FILE *t; 1305 char *p, *ret; 1306#if defined(_WIN32) && !defined(__CYGWIN__) 1307 FILE *to; 1308 1309 t = fopen("CONIN$", "r"); 1310 if (t == NULL) 1311 return (name); 1312 to = fopen("CONOUT$", "w"); 1313 if (to == NULL) { 1314 fclose(t); 1315 return (name); 1316 } 1317 fprintf(to, "%s (Enter/./(new name))? ", name); 1318 fclose(to); 1319#else 1320 t = fopen("/dev/tty", "r+"); 1321 if (t == NULL) 1322 return (name); 1323 fprintf(t, "%s (Enter/./(new name))? ", name); 1324 fflush(t); 1325#endif 1326 1327 p = fgets(buff, sizeof(buff), t); 1328 fclose(t); 1329 if (p == NULL) 1330 /* End-of-file is a blank line. */ 1331 return (NULL); 1332 1333 while (*p == ' ' || *p == '\t') 1334 ++p; 1335 if (*p == '\n' || *p == '\0') 1336 /* Empty line. */ 1337 return (NULL); 1338 if (*p == '.' && p[1] == '\n') 1339 /* Single period preserves original name. */ 1340 return (name); 1341 ret = p; 1342 /* Trim the final newline. */ 1343 while (*p != '\0' && *p != '\n') 1344 ++p; 1345 /* Overwrite the final \n with a null character. */ 1346 *p = '\0'; 1347 return (ret); 1348} 1349 1350static void 1351free_cache(struct name_cache *cache) 1352{ 1353 size_t i; 1354 1355 if (cache != NULL) { 1356 for (i = 0; i < cache->size; i++) 1357 free(cache->cache[i].name); 1358 free(cache); 1359 } 1360} 1361 1362/* 1363 * Lookup uname/gname from uid/gid, return NULL if no match. 1364 */ 1365static const char * 1366lookup_name(struct cpio *cpio, struct name_cache **name_cache_variable, 1367 int (*lookup_fn)(struct cpio *, const char **, id_t), id_t id) 1368{ 1369 char asnum[16]; 1370 struct name_cache *cache; 1371 const char *name; 1372 int slot; 1373 1374 1375 if (*name_cache_variable == NULL) { 1376 *name_cache_variable = calloc(1, sizeof(struct name_cache)); 1377 if (*name_cache_variable == NULL) 1378 lafe_errc(1, ENOMEM, "No more memory"); 1379 (*name_cache_variable)->size = name_cache_size; 1380 } 1381 1382 cache = *name_cache_variable; 1383 cache->probes++; 1384 1385 slot = id % cache->size; 1386 if (cache->cache[slot].name != NULL) { 1387 if (cache->cache[slot].id == id) { 1388 cache->hits++; 1389 return (cache->cache[slot].name); 1390 } 1391 free(cache->cache[slot].name); 1392 cache->cache[slot].name = NULL; 1393 } 1394 1395 if (lookup_fn(cpio, &name, id)) { 1396 /* If lookup failed, format it as a number. */ 1397 snprintf(asnum, sizeof(asnum), "%u", (unsigned)id); 1398 name = asnum; 1399 } 1400 1401 cache->cache[slot].name = strdup(name); 1402 if (cache->cache[slot].name != NULL) { 1403 cache->cache[slot].id = id; 1404 return (cache->cache[slot].name); 1405 } 1406 1407 /* 1408 * Conveniently, NULL marks an empty slot, so 1409 * if the strdup() fails, we've just failed to 1410 * cache it. No recovery necessary. 1411 */ 1412 return (NULL); 1413} 1414 1415static const char * 1416lookup_uname(struct cpio *cpio, uid_t uid) 1417{ 1418 return (lookup_name(cpio, &cpio->uname_cache, 1419 &lookup_uname_helper, (id_t)uid)); 1420} 1421 1422static int 1423lookup_uname_helper(struct cpio *cpio, const char **name, id_t id) 1424{ 1425 struct passwd *pwent; 1426 1427 (void)cpio; /* UNUSED */ 1428 1429 errno = 0; 1430 pwent = getpwuid((uid_t)id); 1431 if (pwent == NULL) { 1432 if (errno && errno != ENOENT) 1433 lafe_warnc(errno, "getpwuid(%s) failed", 1434 cpio_i64toa((int64_t)id)); 1435 return 1; 1436 } 1437 1438 *name = pwent->pw_name; 1439 return 0; 1440} 1441 1442static const char * 1443lookup_gname(struct cpio *cpio, gid_t gid) 1444{ 1445 return (lookup_name(cpio, &cpio->gname_cache, 1446 &lookup_gname_helper, (id_t)gid)); 1447} 1448 1449static int 1450lookup_gname_helper(struct cpio *cpio, const char **name, id_t id) 1451{ 1452 struct group *grent; 1453 1454 (void)cpio; /* UNUSED */ 1455 1456 errno = 0; 1457 grent = getgrgid((gid_t)id); 1458 if (grent == NULL) { 1459 if (errno && errno != ENOENT) 1460 lafe_warnc(errno, "getgrgid(%s) failed", 1461 cpio_i64toa((int64_t)id)); 1462 return 1; 1463 } 1464 1465 *name = grent->gr_name; 1466 return 0; 1467} 1468 1469/* 1470 * It would be nice to just use printf() for formatting large numbers, 1471 * but the compatibility problems are a big headache. Hence the 1472 * following simple utility function. 1473 */ 1474const char * 1475cpio_i64toa(int64_t n0) 1476{ 1477 /* 2^64 =~ 1.8 * 10^19, so 20 decimal digits suffice. 1478 * We also need 1 byte for '-' and 1 for '\0'. 1479 */ 1480 static char buff[22]; 1481 int64_t n = n0 < 0 ? -n0 : n0; 1482 char *p = buff + sizeof(buff); 1483 1484 *--p = '\0'; 1485 do { 1486 *--p = '0' + (int)(n % 10); 1487 n /= 10; 1488 } while (n > 0); 1489 if (n0 < 0) 1490 *--p = '-'; 1491 return p; 1492} 1493 1494#define PPBUFF_SIZE 1024 1495static const char * 1496passphrase_callback(struct archive *a, void *_client_data) 1497{ 1498 struct cpio *cpio = (struct cpio *)_client_data; 1499 (void)a; /* UNUSED */ 1500 1501 if (cpio->ppbuff == NULL) { 1502 cpio->ppbuff = malloc(PPBUFF_SIZE); 1503 if (cpio->ppbuff == NULL) 1504 lafe_errc(1, errno, "Out of memory"); 1505 } 1506 return lafe_readpassphrase("Enter passphrase:", 1507 cpio->ppbuff, PPBUFF_SIZE); 1508} 1509 1510static void 1511passphrase_free(char *ppbuff) 1512{ 1513 if (ppbuff != NULL) { 1514 memset(ppbuff, 0, PPBUFF_SIZE); 1515 free(ppbuff); 1516 } 1517} 1518