cpio.c revision 275031
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/10/contrib/libarchive/cpio/cpio.c 275031 2014-11-25 12:19:05Z dim $"); 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 86/* Fixed size of uname/gname caches. */ 87#define name_cache_size 101 88 89#ifndef O_BINARY 90#define O_BINARY 0 91#endif 92 93struct name_cache { 94 int probes; 95 int hits; 96 size_t size; 97 struct { 98 id_t id; 99 char *name; 100 } cache[name_cache_size]; 101}; 102 103static int extract_data(struct archive *, struct archive *); 104const char * cpio_i64toa(int64_t); 105static const char *cpio_rename(const char *name); 106static int entry_to_archive(struct cpio *, struct archive_entry *); 107static int file_to_archive(struct cpio *, const char *); 108static void free_cache(struct name_cache *cache); 109static void list_item_verbose(struct cpio *, struct archive_entry *); 110static void long_help(void); 111static const char *lookup_gname(struct cpio *, gid_t gid); 112static int lookup_gname_helper(struct cpio *, 113 const char **name, id_t gid); 114static const char *lookup_uname(struct cpio *, uid_t uid); 115static int lookup_uname_helper(struct cpio *, 116 const char **name, id_t uid); 117static void mode_in(struct cpio *); 118static void mode_list(struct cpio *); 119static void mode_out(struct cpio *); 120static void mode_pass(struct cpio *, const char *); 121static const char *remove_leading_slash(const char *); 122static int restore_time(struct cpio *, struct archive_entry *, 123 const char *, int fd); 124static void usage(void); 125static void version(void); 126 127int 128main(int argc, char *argv[]) 129{ 130 static char buff[16384]; 131 struct cpio _cpio; /* Allocated on stack. */ 132 struct cpio *cpio; 133 const char *errmsg; 134 int uid, gid; 135 int opt; 136 137 cpio = &_cpio; 138 memset(cpio, 0, sizeof(*cpio)); 139 cpio->buff = buff; 140 cpio->buff_size = sizeof(buff); 141 142#if defined(HAVE_SIGACTION) && defined(SIGPIPE) 143 { /* Ignore SIGPIPE signals. */ 144 struct sigaction sa; 145 sigemptyset(&sa.sa_mask); 146 sa.sa_flags = 0; 147 sa.sa_handler = SIG_IGN; 148 sigaction(SIGPIPE, &sa, NULL); 149 } 150#endif 151 152 /* Need lafe_progname before calling lafe_warnc. */ 153 if (*argv == NULL) 154 lafe_progname = "bsdcpio"; 155 else { 156#if defined(_WIN32) && !defined(__CYGWIN__) 157 lafe_progname = strrchr(*argv, '\\'); 158 if (strrchr(*argv, '/') > lafe_progname) 159#endif 160 lafe_progname = strrchr(*argv, '/'); 161 if (lafe_progname != NULL) 162 lafe_progname++; 163 else 164 lafe_progname = *argv; 165 } 166#if HAVE_SETLOCALE 167 if (setlocale(LC_ALL, "") == NULL) 168 lafe_warnc(0, "Failed to set default locale"); 169#endif 170 171 cpio->uid_override = -1; 172 cpio->gid_override = -1; 173 cpio->argv = argv; 174 cpio->argc = argc; 175 cpio->mode = '\0'; 176 cpio->verbose = 0; 177 cpio->compress = '\0'; 178 cpio->extract_flags = ARCHIVE_EXTRACT_NO_AUTODIR; 179 cpio->extract_flags |= ARCHIVE_EXTRACT_NO_OVERWRITE_NEWER; 180 cpio->extract_flags |= ARCHIVE_EXTRACT_SECURE_SYMLINKS; 181 cpio->extract_flags |= ARCHIVE_EXTRACT_SECURE_NODOTDOT; 182 cpio->extract_flags |= ARCHIVE_EXTRACT_PERM; 183 cpio->extract_flags |= ARCHIVE_EXTRACT_FFLAGS; 184 cpio->extract_flags |= ARCHIVE_EXTRACT_ACL; 185#if !defined(_WIN32) && !defined(__CYGWIN__) 186 if (geteuid() == 0) 187 cpio->extract_flags |= ARCHIVE_EXTRACT_OWNER; 188#endif 189 cpio->bytes_per_block = 512; 190 cpio->filename = NULL; 191 192 cpio->matching = archive_match_new(); 193 if (cpio->matching == NULL) 194 lafe_errc(1, 0, "Out of memory"); 195 196 while ((opt = cpio_getopt(cpio)) != -1) { 197 switch (opt) { 198 case '0': /* GNU convention: --null, -0 */ 199 cpio->option_null = 1; 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 cpio->bytes_per_block = atoi(cpio->argument); 215 if (cpio->bytes_per_block <= 0) 216 lafe_errc(1, 0, "Invalid blocksize %s", cpio->argument); 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 break; 268 case 'L': /* GNU cpio */ 269 cpio->option_follow_links = 1; 270 break; 271 case 'l': /* POSIX 1997 */ 272 cpio->option_link = 1; 273 break; 274 case OPTION_LRZIP: 275 case OPTION_LZMA: /* GNU tar, others */ 276 case OPTION_LZOP: /* GNU tar, others */ 277 cpio->compress = opt; 278 break; 279 case 'm': /* POSIX 1997 */ 280 cpio->extract_flags |= ARCHIVE_EXTRACT_TIME; 281 break; 282 case 'n': /* GNU cpio */ 283 cpio->option_numeric_uid_gid = 1; 284 break; 285 case OPTION_NO_PRESERVE_OWNER: /* GNU cpio */ 286 cpio->extract_flags &= ~ARCHIVE_EXTRACT_OWNER; 287 break; 288 case 'O': /* GNU cpio */ 289 cpio->filename = cpio->argument; 290 break; 291 case 'o': /* POSIX 1997 */ 292 if (cpio->mode != '\0') 293 lafe_errc(1, 0, 294 "Cannot use both -o and -%c", cpio->mode); 295 cpio->mode = opt; 296 break; 297 case 'p': /* POSIX 1997 */ 298 if (cpio->mode != '\0') 299 lafe_errc(1, 0, 300 "Cannot use both -p and -%c", cpio->mode); 301 cpio->mode = opt; 302 cpio->extract_flags &= ~ARCHIVE_EXTRACT_SECURE_NODOTDOT; 303 break; 304 case OPTION_PRESERVE_OWNER: 305 cpio->extract_flags |= ARCHIVE_EXTRACT_OWNER; 306 break; 307 case OPTION_QUIET: /* GNU cpio */ 308 cpio->quiet = 1; 309 break; 310 case 'R': /* GNU cpio, also --owner */ 311 /* TODO: owner_parse should return uname/gname 312 * also; use that to set [ug]name_override. */ 313 errmsg = owner_parse(cpio->argument, &uid, &gid); 314 if (errmsg) { 315 lafe_warnc(-1, "%s", errmsg); 316 usage(); 317 } 318 if (uid != -1) { 319 cpio->uid_override = uid; 320 cpio->uname_override = NULL; 321 } 322 if (gid != -1) { 323 cpio->gid_override = gid; 324 cpio->gname_override = NULL; 325 } 326 break; 327 case 'r': /* POSIX 1997 */ 328 cpio->option_rename = 1; 329 break; 330 case 't': /* POSIX 1997 */ 331 cpio->option_list = 1; 332 break; 333 case 'u': /* POSIX 1997 */ 334 cpio->extract_flags 335 &= ~ARCHIVE_EXTRACT_NO_OVERWRITE_NEWER; 336 break; 337 case OPTION_UUENCODE: 338 cpio->add_filter = opt; 339 break; 340 case 'v': /* POSIX 1997 */ 341 cpio->verbose++; 342 break; 343 case 'V': /* GNU cpio */ 344 cpio->dot++; 345 break; 346 case OPTION_VERSION: /* GNU convention */ 347 version(); 348 break; 349#if 0 350 /* 351 * cpio_getopt() handles -W specially, so it's not 352 * available here. 353 */ 354 case 'W': /* Obscure, but useful GNU convention. */ 355 break; 356#endif 357 case 'y': /* tar convention */ 358 cpio->compress = opt; 359 break; 360 case 'Z': /* tar convention */ 361 cpio->compress = opt; 362 break; 363 case 'z': /* tar convention */ 364 cpio->compress = opt; 365 break; 366 default: 367 usage(); 368 } 369 } 370 371 /* 372 * Sanity-check args, error out on nonsensical combinations. 373 */ 374 /* -t implies -i if no mode was specified. */ 375 if (cpio->option_list && cpio->mode == '\0') 376 cpio->mode = 'i'; 377 /* -t requires -i */ 378 if (cpio->option_list && cpio->mode != 'i') 379 lafe_errc(1, 0, "Option -t requires -i"); 380 /* -n requires -it */ 381 if (cpio->option_numeric_uid_gid && !cpio->option_list) 382 lafe_errc(1, 0, "Option -n requires -it"); 383 /* Can only specify format when writing */ 384 if (cpio->format != NULL && cpio->mode != 'o') 385 lafe_errc(1, 0, "Option --format requires -o"); 386 /* -l requires -p */ 387 if (cpio->option_link && cpio->mode != 'p') 388 lafe_errc(1, 0, "Option -l requires -p"); 389 /* -v overrides -V */ 390 if (cpio->dot && cpio->verbose) 391 cpio->dot = 0; 392 /* TODO: Flag other nonsensical combinations. */ 393 394 switch (cpio->mode) { 395 case 'o': 396 /* TODO: Implement old binary format in libarchive, 397 use that here. */ 398 if (cpio->format == NULL) 399 cpio->format = "odc"; /* Default format */ 400 401 mode_out(cpio); 402 break; 403 case 'i': 404 while (*cpio->argv != NULL) { 405 if (archive_match_include_pattern(cpio->matching, 406 *cpio->argv) != ARCHIVE_OK) 407 lafe_errc(1, 0, "Error : %s", 408 archive_error_string(cpio->matching)); 409 --cpio->argc; 410 ++cpio->argv; 411 } 412 if (cpio->option_list) 413 mode_list(cpio); 414 else 415 mode_in(cpio); 416 break; 417 case 'p': 418 if (*cpio->argv == NULL || **cpio->argv == '\0') 419 lafe_errc(1, 0, 420 "-p mode requires a target directory"); 421 mode_pass(cpio, *cpio->argv); 422 break; 423 default: 424 lafe_errc(1, 0, 425 "Must specify at least one of -i, -o, or -p"); 426 } 427 428 archive_match_free(cpio->matching); 429 free_cache(cpio->gname_cache); 430 free_cache(cpio->uname_cache); 431 free(cpio->destdir); 432 return (cpio->return_value); 433} 434 435static void 436usage(void) 437{ 438 const char *p; 439 440 p = lafe_progname; 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_progname; 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_string()); 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_LZMA: 541 r = archive_write_add_filter_lzma(cpio->archive); 542 break; 543 case OPTION_LZOP: 544 r = archive_write_add_filter_lzop(cpio->archive); 545 break; 546 case 'j': case 'y': 547 r = archive_write_add_filter_bzip2(cpio->archive); 548 break; 549 case 'z': 550 r = archive_write_add_filter_gzip(cpio->archive); 551 break; 552 case 'Z': 553 r = archive_write_add_filter_compress(cpio->archive); 554 break; 555 default: 556 r = archive_write_add_filter_none(cpio->archive); 557 break; 558 } 559 if (r < ARCHIVE_WARN) 560 lafe_errc(1, 0, "Requested compression not available"); 561 switch (cpio->add_filter) { 562 case 0: 563 r = ARCHIVE_OK; 564 break; 565 case OPTION_B64ENCODE: 566 r = archive_write_add_filter_b64encode(cpio->archive); 567 break; 568 case OPTION_UUENCODE: 569 r = archive_write_add_filter_uuencode(cpio->archive); 570 break; 571 } 572 if (r < ARCHIVE_WARN) 573 lafe_errc(1, 0, "Requested filter not available"); 574 r = archive_write_set_format_by_name(cpio->archive, cpio->format); 575 if (r != ARCHIVE_OK) 576 lafe_errc(1, 0, "%s", archive_error_string(cpio->archive)); 577 archive_write_set_bytes_per_block(cpio->archive, cpio->bytes_per_block); 578 cpio->linkresolver = archive_entry_linkresolver_new(); 579 archive_entry_linkresolver_set_strategy(cpio->linkresolver, 580 archive_format(cpio->archive)); 581 582 /* 583 * The main loop: Copy each file into the output archive. 584 */ 585 r = archive_write_open_filename(cpio->archive, cpio->filename); 586 if (r != ARCHIVE_OK) 587 lafe_errc(1, 0, "%s", archive_error_string(cpio->archive)); 588 lr = lafe_line_reader("-", cpio->option_null); 589 while ((p = lafe_line_reader_next(lr)) != NULL) 590 file_to_archive(cpio, p); 591 lafe_line_reader_free(lr); 592 593 /* 594 * The hardlink detection may have queued up a couple of entries 595 * that can now be flushed. 596 */ 597 entry = NULL; 598 archive_entry_linkify(cpio->linkresolver, &entry, &spare); 599 while (entry != NULL) { 600 entry_to_archive(cpio, entry); 601 archive_entry_free(entry); 602 entry = NULL; 603 archive_entry_linkify(cpio->linkresolver, &entry, &spare); 604 } 605 606 r = archive_write_close(cpio->archive); 607 if (cpio->dot) 608 fprintf(stderr, "\n"); 609 if (r != ARCHIVE_OK) 610 lafe_errc(1, 0, "%s", archive_error_string(cpio->archive)); 611 612 if (!cpio->quiet) { 613 int64_t blocks = 614 (archive_filter_bytes(cpio->archive, 0) + 511) 615 / 512; 616 fprintf(stderr, "%lu %s\n", (unsigned long)blocks, 617 blocks == 1 ? "block" : "blocks"); 618 } 619 archive_write_free(cpio->archive); 620} 621 622static const char * 623remove_leading_slash(const char *p) 624{ 625 const char *rp; 626 627 /* Remove leading "//./" or "//?/" or "//?/UNC/" 628 * (absolute path prefixes used by Windows API) */ 629 if ((p[0] == '/' || p[0] == '\\') && 630 (p[1] == '/' || p[1] == '\\') && 631 (p[2] == '.' || p[2] == '?') && 632 (p[3] == '/' || p[3] == '\\')) 633 { 634 if (p[2] == '?' && 635 (p[4] == 'U' || p[4] == 'u') && 636 (p[5] == 'N' || p[5] == 'n') && 637 (p[6] == 'C' || p[6] == 'c') && 638 (p[7] == '/' || p[7] == '\\')) 639 p += 8; 640 else 641 p += 4; 642 } 643 do { 644 rp = p; 645 /* Remove leading drive letter from archives created 646 * on Windows. */ 647 if (((p[0] >= 'a' && p[0] <= 'z') || 648 (p[0] >= 'A' && p[0] <= 'Z')) && 649 p[1] == ':') { 650 p += 2; 651 } 652 /* Remove leading "/../", "//", etc. */ 653 while (p[0] == '/' || p[0] == '\\') { 654 if (p[1] == '.' && p[2] == '.' && 655 (p[3] == '/' || p[3] == '\\')) { 656 p += 3; /* Remove "/..", leave "/" 657 * for next pass. */ 658 } else 659 p += 1; /* Remove "/". */ 660 } 661 } while (rp != p); 662 return (p); 663} 664 665/* 666 * This is used by both out mode (to copy objects from disk into 667 * an archive) and pass mode (to copy objects from disk to 668 * an archive_write_disk "archive"). 669 */ 670static int 671file_to_archive(struct cpio *cpio, const char *srcpath) 672{ 673 const char *destpath; 674 struct archive_entry *entry, *spare; 675 size_t len; 676 int r; 677 678 /* 679 * Create an archive_entry describing the source file. 680 * 681 */ 682 entry = archive_entry_new(); 683 if (entry == NULL) 684 lafe_errc(1, 0, "Couldn't allocate entry"); 685 archive_entry_copy_sourcepath(entry, srcpath); 686 r = archive_read_disk_entry_from_file(cpio->archive_read_disk, 687 entry, -1, NULL); 688 if (r < ARCHIVE_FAILED) 689 lafe_errc(1, 0, "%s", 690 archive_error_string(cpio->archive_read_disk)); 691 if (r < ARCHIVE_OK) 692 lafe_warnc(0, "%s", 693 archive_error_string(cpio->archive_read_disk)); 694 if (r <= ARCHIVE_FAILED) { 695 cpio->return_value = 1; 696 return (r); 697 } 698 699 if (cpio->uid_override >= 0) { 700 archive_entry_set_uid(entry, cpio->uid_override); 701 archive_entry_set_uname(entry, cpio->uname_override); 702 } 703 if (cpio->gid_override >= 0) { 704 archive_entry_set_gid(entry, cpio->gid_override); 705 archive_entry_set_gname(entry, cpio->gname_override); 706 } 707 708 /* 709 * Generate a destination path for this entry. 710 * "destination path" is the name to which it will be copied in 711 * pass mode or the name that will go into the archive in 712 * output mode. 713 */ 714 destpath = srcpath; 715 if (cpio->destdir) { 716 len = strlen(cpio->destdir) + strlen(srcpath) + 8; 717 if (len >= cpio->pass_destpath_alloc) { 718 while (len >= cpio->pass_destpath_alloc) { 719 cpio->pass_destpath_alloc += 512; 720 cpio->pass_destpath_alloc *= 2; 721 } 722 free(cpio->pass_destpath); 723 cpio->pass_destpath = malloc(cpio->pass_destpath_alloc); 724 if (cpio->pass_destpath == NULL) 725 lafe_errc(1, ENOMEM, 726 "Can't allocate path buffer"); 727 } 728 strcpy(cpio->pass_destpath, cpio->destdir); 729 strcat(cpio->pass_destpath, remove_leading_slash(srcpath)); 730 destpath = cpio->pass_destpath; 731 } 732 if (cpio->option_rename) 733 destpath = cpio_rename(destpath); 734 if (destpath == NULL) 735 return (0); 736 archive_entry_copy_pathname(entry, destpath); 737 738 /* 739 * If we're trying to preserve hardlinks, match them here. 740 */ 741 spare = NULL; 742 if (cpio->linkresolver != NULL 743 && archive_entry_filetype(entry) != AE_IFDIR) { 744 archive_entry_linkify(cpio->linkresolver, &entry, &spare); 745 } 746 747 if (entry != NULL) { 748 r = entry_to_archive(cpio, entry); 749 archive_entry_free(entry); 750 if (spare != NULL) { 751 if (r == 0) 752 r = entry_to_archive(cpio, spare); 753 archive_entry_free(spare); 754 } 755 } 756 return (r); 757} 758 759static int 760entry_to_archive(struct cpio *cpio, struct archive_entry *entry) 761{ 762 const char *destpath = archive_entry_pathname(entry); 763 const char *srcpath = archive_entry_sourcepath(entry); 764 int fd = -1; 765 ssize_t bytes_read; 766 int r; 767 768 /* Print out the destination name to the user. */ 769 if (cpio->verbose) 770 fprintf(stderr,"%s", destpath); 771 if (cpio->dot) 772 fprintf(stderr, "."); 773 774 /* 775 * Option_link only makes sense in pass mode and for 776 * regular files. Also note: if a link operation fails 777 * because of cross-device restrictions, we'll fall back 778 * to copy mode for that entry. 779 * 780 * TODO: Test other cpio implementations to see if they 781 * hard-link anything other than regular files here. 782 */ 783 if (cpio->option_link 784 && archive_entry_filetype(entry) == AE_IFREG) 785 { 786 struct archive_entry *t; 787 /* Save the original entry in case we need it later. */ 788 t = archive_entry_clone(entry); 789 if (t == NULL) 790 lafe_errc(1, ENOMEM, "Can't create link"); 791 /* Note: link(2) doesn't create parent directories, 792 * so we use archive_write_header() instead as a 793 * convenience. */ 794 archive_entry_set_hardlink(t, srcpath); 795 /* This is a straight link that carries no data. */ 796 archive_entry_set_size(t, 0); 797 r = archive_write_header(cpio->archive, t); 798 archive_entry_free(t); 799 if (r != ARCHIVE_OK) 800 lafe_warnc(archive_errno(cpio->archive), 801 "%s", archive_error_string(cpio->archive)); 802 if (r == ARCHIVE_FATAL) 803 exit(1); 804#ifdef EXDEV 805 if (r != ARCHIVE_OK && archive_errno(cpio->archive) == EXDEV) { 806 /* Cross-device link: Just fall through and use 807 * the original entry to copy the file over. */ 808 lafe_warnc(0, "Copying file instead"); 809 } else 810#endif 811 return (0); 812 } 813 814 /* 815 * Make sure we can open the file (if necessary) before 816 * trying to write the header. 817 */ 818 if (archive_entry_filetype(entry) == AE_IFREG) { 819 if (archive_entry_size(entry) > 0) { 820 fd = open(srcpath, O_RDONLY | O_BINARY); 821 if (fd < 0) { 822 lafe_warnc(errno, 823 "%s: could not open file", srcpath); 824 goto cleanup; 825 } 826 } 827 } else { 828 archive_entry_set_size(entry, 0); 829 } 830 831 r = archive_write_header(cpio->archive, entry); 832 833 if (r != ARCHIVE_OK) 834 lafe_warnc(archive_errno(cpio->archive), 835 "%s: %s", 836 srcpath, 837 archive_error_string(cpio->archive)); 838 839 if (r == ARCHIVE_FATAL) 840 exit(1); 841 842 if (r >= ARCHIVE_WARN && archive_entry_size(entry) > 0 && fd >= 0) { 843 bytes_read = read(fd, cpio->buff, (unsigned)cpio->buff_size); 844 while (bytes_read > 0) { 845 ssize_t bytes_write; 846 bytes_write = archive_write_data(cpio->archive, 847 cpio->buff, bytes_read); 848 if (bytes_write < 0) 849 lafe_errc(1, archive_errno(cpio->archive), 850 "%s", archive_error_string(cpio->archive)); 851 if (bytes_write < bytes_read) { 852 lafe_warnc(0, 853 "Truncated write; file may have " 854 "grown while being archived."); 855 } 856 bytes_read = read(fd, cpio->buff, 857 (unsigned)cpio->buff_size); 858 } 859 } 860 861 fd = restore_time(cpio, entry, srcpath, fd); 862 863cleanup: 864 if (cpio->verbose) 865 fprintf(stderr,"\n"); 866 if (fd >= 0) 867 close(fd); 868 return (0); 869} 870 871static int 872restore_time(struct cpio *cpio, struct archive_entry *entry, 873 const char *name, int fd) 874{ 875#ifndef HAVE_UTIMES 876 static int warned = 0; 877 878 (void)cpio; /* UNUSED */ 879 (void)entry; /* UNUSED */ 880 (void)name; /* UNUSED */ 881 882 if (!warned) 883 lafe_warnc(0, "Can't restore access times on this platform"); 884 warned = 1; 885 return (fd); 886#else 887#if defined(_WIN32) && !defined(__CYGWIN__) 888 struct __timeval times[2]; 889#else 890 struct timeval times[2]; 891#endif 892 893 if (!cpio->option_atime_restore) 894 return (fd); 895 896 times[1].tv_sec = archive_entry_mtime(entry); 897 times[1].tv_usec = archive_entry_mtime_nsec(entry) / 1000; 898 899 times[0].tv_sec = archive_entry_atime(entry); 900 times[0].tv_usec = archive_entry_atime_nsec(entry) / 1000; 901 902#if defined(HAVE_FUTIMES) && !defined(__CYGWIN__) 903 if (fd >= 0 && futimes(fd, times) == 0) 904 return (fd); 905#endif 906 /* 907 * Some platform cannot restore access times if the file descriptor 908 * is still opened. 909 */ 910 if (fd >= 0) { 911 close(fd); 912 fd = -1; 913 } 914 915#ifdef HAVE_LUTIMES 916 if (lutimes(name, times) != 0) 917#else 918 if ((AE_IFLNK != archive_entry_filetype(entry)) 919 && utimes(name, times) != 0) 920#endif 921 lafe_warnc(errno, "Can't update time for %s", name); 922#endif 923 return (fd); 924} 925 926 927static void 928mode_in(struct cpio *cpio) 929{ 930 struct archive *a; 931 struct archive_entry *entry; 932 struct archive *ext; 933 const char *destpath; 934 int r; 935 936 ext = archive_write_disk_new(); 937 if (ext == NULL) 938 lafe_errc(1, 0, "Couldn't allocate restore object"); 939 r = archive_write_disk_set_options(ext, cpio->extract_flags); 940 if (r != ARCHIVE_OK) 941 lafe_errc(1, 0, "%s", archive_error_string(ext)); 942 a = archive_read_new(); 943 if (a == NULL) 944 lafe_errc(1, 0, "Couldn't allocate archive object"); 945 archive_read_support_filter_all(a); 946 archive_read_support_format_all(a); 947 948 if (archive_read_open_filename(a, cpio->filename, 949 cpio->bytes_per_block)) 950 lafe_errc(1, archive_errno(a), 951 "%s", archive_error_string(a)); 952 for (;;) { 953 r = archive_read_next_header(a, &entry); 954 if (r == ARCHIVE_EOF) 955 break; 956 if (r != ARCHIVE_OK) { 957 lafe_errc(1, archive_errno(a), 958 "%s", archive_error_string(a)); 959 } 960 if (archive_match_path_excluded(cpio->matching, entry)) 961 continue; 962 if (cpio->option_rename) { 963 destpath = cpio_rename(archive_entry_pathname(entry)); 964 archive_entry_set_pathname(entry, destpath); 965 } else 966 destpath = archive_entry_pathname(entry); 967 if (destpath == NULL) 968 continue; 969 if (cpio->verbose) 970 fprintf(stderr, "%s\n", destpath); 971 if (cpio->dot) 972 fprintf(stderr, "."); 973 if (cpio->uid_override >= 0) 974 archive_entry_set_uid(entry, cpio->uid_override); 975 if (cpio->gid_override >= 0) 976 archive_entry_set_gid(entry, cpio->gid_override); 977 r = archive_write_header(ext, entry); 978 if (r != ARCHIVE_OK) { 979 fprintf(stderr, "%s: %s\n", 980 archive_entry_pathname(entry), 981 archive_error_string(ext)); 982 } else if (!archive_entry_size_is_set(entry) 983 || archive_entry_size(entry) > 0) { 984 r = extract_data(a, ext); 985 if (r != ARCHIVE_OK) 986 cpio->return_value = 1; 987 } 988 } 989 r = archive_read_close(a); 990 if (cpio->dot) 991 fprintf(stderr, "\n"); 992 if (r != ARCHIVE_OK) 993 lafe_errc(1, 0, "%s", archive_error_string(a)); 994 r = archive_write_close(ext); 995 if (r != ARCHIVE_OK) 996 lafe_errc(1, 0, "%s", archive_error_string(ext)); 997 if (!cpio->quiet) { 998 int64_t blocks = (archive_filter_bytes(a, 0) + 511) 999 / 512; 1000 fprintf(stderr, "%lu %s\n", (unsigned long)blocks, 1001 blocks == 1 ? "block" : "blocks"); 1002 } 1003 archive_read_free(a); 1004 archive_write_free(ext); 1005 exit(cpio->return_value); 1006} 1007 1008/* 1009 * Exits if there's a fatal error. Returns ARCHIVE_OK 1010 * if everything is kosher. 1011 */ 1012static int 1013extract_data(struct archive *ar, struct archive *aw) 1014{ 1015 int r; 1016 size_t size; 1017 const void *block; 1018 int64_t offset; 1019 1020 for (;;) { 1021 r = archive_read_data_block(ar, &block, &size, &offset); 1022 if (r == ARCHIVE_EOF) 1023 return (ARCHIVE_OK); 1024 if (r != ARCHIVE_OK) { 1025 lafe_warnc(archive_errno(ar), 1026 "%s", archive_error_string(ar)); 1027 exit(1); 1028 } 1029 r = (int)archive_write_data_block(aw, block, size, offset); 1030 if (r != ARCHIVE_OK) { 1031 lafe_warnc(archive_errno(aw), 1032 "%s", archive_error_string(aw)); 1033 return (r); 1034 } 1035 } 1036} 1037 1038static void 1039mode_list(struct cpio *cpio) 1040{ 1041 struct archive *a; 1042 struct archive_entry *entry; 1043 int r; 1044 1045 a = archive_read_new(); 1046 if (a == NULL) 1047 lafe_errc(1, 0, "Couldn't allocate archive object"); 1048 archive_read_support_filter_all(a); 1049 archive_read_support_format_all(a); 1050 1051 if (archive_read_open_filename(a, cpio->filename, 1052 cpio->bytes_per_block)) 1053 lafe_errc(1, archive_errno(a), 1054 "%s", archive_error_string(a)); 1055 for (;;) { 1056 r = archive_read_next_header(a, &entry); 1057 if (r == ARCHIVE_EOF) 1058 break; 1059 if (r != ARCHIVE_OK) { 1060 lafe_errc(1, archive_errno(a), 1061 "%s", archive_error_string(a)); 1062 } 1063 if (archive_match_path_excluded(cpio->matching, entry)) 1064 continue; 1065 if (cpio->verbose) 1066 list_item_verbose(cpio, entry); 1067 else 1068 fprintf(stdout, "%s\n", archive_entry_pathname(entry)); 1069 } 1070 r = archive_read_close(a); 1071 if (r != ARCHIVE_OK) 1072 lafe_errc(1, 0, "%s", archive_error_string(a)); 1073 if (!cpio->quiet) { 1074 int64_t blocks = (archive_filter_bytes(a, 0) + 511) 1075 / 512; 1076 fprintf(stderr, "%lu %s\n", (unsigned long)blocks, 1077 blocks == 1 ? "block" : "blocks"); 1078 } 1079 archive_read_free(a); 1080 exit(0); 1081} 1082 1083/* 1084 * Display information about the current file. 1085 * 1086 * The format here roughly duplicates the output of 'ls -l'. 1087 * This is based on SUSv2, where 'tar tv' is documented as 1088 * listing additional information in an "unspecified format," 1089 * and 'pax -l' is documented as using the same format as 'ls -l'. 1090 */ 1091static void 1092list_item_verbose(struct cpio *cpio, struct archive_entry *entry) 1093{ 1094 char size[32]; 1095 char date[32]; 1096 char uids[16], gids[16]; 1097 const char *uname, *gname; 1098 FILE *out = stdout; 1099 const char *fmt; 1100 time_t mtime; 1101 static time_t now; 1102 1103 if (!now) 1104 time(&now); 1105 1106 if (cpio->option_numeric_uid_gid) { 1107 /* Format numeric uid/gid for display. */ 1108 strcpy(uids, cpio_i64toa(archive_entry_uid(entry))); 1109 uname = uids; 1110 strcpy(gids, cpio_i64toa(archive_entry_gid(entry))); 1111 gname = gids; 1112 } else { 1113 /* Use uname if it's present, else lookup name from uid. */ 1114 uname = archive_entry_uname(entry); 1115 if (uname == NULL) 1116 uname = lookup_uname(cpio, (uid_t)archive_entry_uid(entry)); 1117 /* Use gname if it's present, else lookup name from gid. */ 1118 gname = archive_entry_gname(entry); 1119 if (gname == NULL) 1120 gname = lookup_gname(cpio, (uid_t)archive_entry_gid(entry)); 1121 } 1122 1123 /* Print device number or file size. */ 1124 if (archive_entry_filetype(entry) == AE_IFCHR 1125 || archive_entry_filetype(entry) == AE_IFBLK) { 1126 snprintf(size, sizeof(size), "%lu,%lu", 1127 (unsigned long)archive_entry_rdevmajor(entry), 1128 (unsigned long)archive_entry_rdevminor(entry)); 1129 } else { 1130 strcpy(size, cpio_i64toa(archive_entry_size(entry))); 1131 } 1132 1133 /* Format the time using 'ls -l' conventions. */ 1134 mtime = archive_entry_mtime(entry); 1135#if defined(_WIN32) && !defined(__CYGWIN__) 1136 /* Windows' strftime function does not support %e format. */ 1137 if (mtime - now > 365*86400/2 1138 || mtime - now < -365*86400/2) 1139 fmt = cpio->day_first ? "%d %b %Y" : "%b %d %Y"; 1140 else 1141 fmt = cpio->day_first ? "%d %b %H:%M" : "%b %d %H:%M"; 1142#else 1143 if (mtime - now > 365*86400/2 1144 || mtime - now < -365*86400/2) 1145 fmt = cpio->day_first ? "%e %b %Y" : "%b %e %Y"; 1146 else 1147 fmt = cpio->day_first ? "%e %b %H:%M" : "%b %e %H:%M"; 1148#endif 1149 strftime(date, sizeof(date), fmt, localtime(&mtime)); 1150 1151 fprintf(out, "%s%3d %-8s %-8s %8s %12s %s", 1152 archive_entry_strmode(entry), 1153 archive_entry_nlink(entry), 1154 uname, gname, size, date, 1155 archive_entry_pathname(entry)); 1156 1157 /* Extra information for links. */ 1158 if (archive_entry_hardlink(entry)) /* Hard link */ 1159 fprintf(out, " link to %s", archive_entry_hardlink(entry)); 1160 else if (archive_entry_symlink(entry)) /* Symbolic link */ 1161 fprintf(out, " -> %s", archive_entry_symlink(entry)); 1162 fprintf(out, "\n"); 1163} 1164 1165static void 1166mode_pass(struct cpio *cpio, const char *destdir) 1167{ 1168 struct lafe_line_reader *lr; 1169 const char *p; 1170 int r; 1171 1172 /* Ensure target dir has a trailing '/' to simplify path surgery. */ 1173 cpio->destdir = malloc(strlen(destdir) + 8); 1174 strcpy(cpio->destdir, destdir); 1175 if (destdir[strlen(destdir) - 1] != '/') 1176 strcat(cpio->destdir, "/"); 1177 1178 cpio->archive = archive_write_disk_new(); 1179 if (cpio->archive == NULL) 1180 lafe_errc(1, 0, "Failed to allocate archive object"); 1181 r = archive_write_disk_set_options(cpio->archive, cpio->extract_flags); 1182 if (r != ARCHIVE_OK) 1183 lafe_errc(1, 0, "%s", archive_error_string(cpio->archive)); 1184 cpio->linkresolver = archive_entry_linkresolver_new(); 1185 archive_write_disk_set_standard_lookup(cpio->archive); 1186 1187 cpio->archive_read_disk = archive_read_disk_new(); 1188 if (cpio->archive_read_disk == NULL) 1189 lafe_errc(1, 0, "Failed to allocate archive object"); 1190 if (cpio->option_follow_links) 1191 archive_read_disk_set_symlink_logical(cpio->archive_read_disk); 1192 else 1193 archive_read_disk_set_symlink_physical(cpio->archive_read_disk); 1194 archive_read_disk_set_standard_lookup(cpio->archive_read_disk); 1195 1196 lr = lafe_line_reader("-", cpio->option_null); 1197 while ((p = lafe_line_reader_next(lr)) != NULL) 1198 file_to_archive(cpio, p); 1199 lafe_line_reader_free(lr); 1200 1201 archive_entry_linkresolver_free(cpio->linkresolver); 1202 r = archive_write_close(cpio->archive); 1203 if (cpio->dot) 1204 fprintf(stderr, "\n"); 1205 if (r != ARCHIVE_OK) 1206 lafe_errc(1, 0, "%s", archive_error_string(cpio->archive)); 1207 1208 if (!cpio->quiet) { 1209 int64_t blocks = 1210 (archive_filter_bytes(cpio->archive, 0) + 511) 1211 / 512; 1212 fprintf(stderr, "%lu %s\n", (unsigned long)blocks, 1213 blocks == 1 ? "block" : "blocks"); 1214 } 1215 1216 archive_write_free(cpio->archive); 1217} 1218 1219/* 1220 * Prompt for a new name for this entry. Returns a pointer to the 1221 * new name or NULL if the entry should not be copied. This 1222 * implements the semantics defined in POSIX.1-1996, which specifies 1223 * that an input of '.' means the name should be unchanged. GNU cpio 1224 * treats '.' as a literal new name. 1225 */ 1226static const char * 1227cpio_rename(const char *name) 1228{ 1229 static char buff[1024]; 1230 FILE *t; 1231 char *p, *ret; 1232#if defined(_WIN32) && !defined(__CYGWIN__) 1233 FILE *to; 1234 1235 t = fopen("CONIN$", "r"); 1236 if (t == NULL) 1237 return (name); 1238 to = fopen("CONOUT$", "w"); 1239 if (to == NULL) 1240 return (name); 1241 fprintf(to, "%s (Enter/./(new name))? ", name); 1242 fclose(to); 1243#else 1244 t = fopen("/dev/tty", "r+"); 1245 if (t == NULL) 1246 return (name); 1247 fprintf(t, "%s (Enter/./(new name))? ", name); 1248 fflush(t); 1249#endif 1250 1251 p = fgets(buff, sizeof(buff), t); 1252 fclose(t); 1253 if (p == NULL) 1254 /* End-of-file is a blank line. */ 1255 return (NULL); 1256 1257 while (*p == ' ' || *p == '\t') 1258 ++p; 1259 if (*p == '\n' || *p == '\0') 1260 /* Empty line. */ 1261 return (NULL); 1262 if (*p == '.' && p[1] == '\n') 1263 /* Single period preserves original name. */ 1264 return (name); 1265 ret = p; 1266 /* Trim the final newline. */ 1267 while (*p != '\0' && *p != '\n') 1268 ++p; 1269 /* Overwrite the final \n with a null character. */ 1270 *p = '\0'; 1271 return (ret); 1272} 1273 1274static void 1275free_cache(struct name_cache *cache) 1276{ 1277 size_t i; 1278 1279 if (cache != NULL) { 1280 for (i = 0; i < cache->size; i++) 1281 free(cache->cache[i].name); 1282 free(cache); 1283 } 1284} 1285 1286/* 1287 * Lookup uname/gname from uid/gid, return NULL if no match. 1288 */ 1289static const char * 1290lookup_name(struct cpio *cpio, struct name_cache **name_cache_variable, 1291 int (*lookup_fn)(struct cpio *, const char **, id_t), id_t id) 1292{ 1293 char asnum[16]; 1294 struct name_cache *cache; 1295 const char *name; 1296 int slot; 1297 1298 1299 if (*name_cache_variable == NULL) { 1300 *name_cache_variable = malloc(sizeof(struct name_cache)); 1301 if (*name_cache_variable == NULL) 1302 lafe_errc(1, ENOMEM, "No more memory"); 1303 memset(*name_cache_variable, 0, sizeof(struct name_cache)); 1304 (*name_cache_variable)->size = name_cache_size; 1305 } 1306 1307 cache = *name_cache_variable; 1308 cache->probes++; 1309 1310 slot = id % cache->size; 1311 if (cache->cache[slot].name != NULL) { 1312 if (cache->cache[slot].id == id) { 1313 cache->hits++; 1314 return (cache->cache[slot].name); 1315 } 1316 free(cache->cache[slot].name); 1317 cache->cache[slot].name = NULL; 1318 } 1319 1320 if (lookup_fn(cpio, &name, id) == 0) { 1321 if (name == NULL || name[0] == '\0') { 1322 /* If lookup failed, format it as a number. */ 1323 snprintf(asnum, sizeof(asnum), "%u", (unsigned)id); 1324 name = asnum; 1325 } 1326 cache->cache[slot].name = strdup(name); 1327 if (cache->cache[slot].name != NULL) { 1328 cache->cache[slot].id = id; 1329 return (cache->cache[slot].name); 1330 } 1331 /* 1332 * Conveniently, NULL marks an empty slot, so 1333 * if the strdup() fails, we've just failed to 1334 * cache it. No recovery necessary. 1335 */ 1336 } 1337 return (NULL); 1338} 1339 1340static const char * 1341lookup_uname(struct cpio *cpio, uid_t uid) 1342{ 1343 return (lookup_name(cpio, &cpio->uname_cache, 1344 &lookup_uname_helper, (id_t)uid)); 1345} 1346 1347static int 1348lookup_uname_helper(struct cpio *cpio, const char **name, id_t id) 1349{ 1350 struct passwd *pwent; 1351 1352 (void)cpio; /* UNUSED */ 1353 1354 errno = 0; 1355 pwent = getpwuid((uid_t)id); 1356 if (pwent == NULL) { 1357 *name = NULL; 1358 if (errno != 0 && errno != ENOENT) 1359 lafe_warnc(errno, "getpwuid(%s) failed", 1360 cpio_i64toa((int64_t)id)); 1361 return (errno); 1362 } 1363 1364 *name = pwent->pw_name; 1365 return (0); 1366} 1367 1368static const char * 1369lookup_gname(struct cpio *cpio, gid_t gid) 1370{ 1371 return (lookup_name(cpio, &cpio->gname_cache, 1372 &lookup_gname_helper, (id_t)gid)); 1373} 1374 1375static int 1376lookup_gname_helper(struct cpio *cpio, const char **name, id_t id) 1377{ 1378 struct group *grent; 1379 1380 (void)cpio; /* UNUSED */ 1381 1382 errno = 0; 1383 grent = getgrgid((gid_t)id); 1384 if (grent == NULL) { 1385 *name = NULL; 1386 if (errno != 0) 1387 lafe_warnc(errno, "getgrgid(%s) failed", 1388 cpio_i64toa((int64_t)id)); 1389 return (errno); 1390 } 1391 1392 *name = grent->gr_name; 1393 return (0); 1394} 1395 1396/* 1397 * It would be nice to just use printf() for formatting large numbers, 1398 * but the compatibility problems are a big headache. Hence the 1399 * following simple utility function. 1400 */ 1401const char * 1402cpio_i64toa(int64_t n0) 1403{ 1404 /* 2^64 =~ 1.8 * 10^19, so 20 decimal digits suffice. 1405 * We also need 1 byte for '-' and 1 for '\0'. 1406 */ 1407 static char buff[22]; 1408 int64_t n = n0 < 0 ? -n0 : n0; 1409 char *p = buff + sizeof(buff); 1410 1411 *--p = '\0'; 1412 do { 1413 *--p = '0' + (int)(n % 10); 1414 n /= 10; 1415 } while (n > 0); 1416 if (n0 < 0) 1417 *--p = '-'; 1418 return p; 1419} 1420