contrib/libarchive/cpio/cpio.c

   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: src/usr.bin/cpio/cpio.c,v 1.15 2008/12/06 07:30:40 kientzle Exp $");
  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
  94 struct 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
 104 static int      extract_data(struct archive *, struct archive *);
 105 const char *    cpio_i64toa(int64_t);
 106 static const char *cpio_rename(const char *name);
 107 static int      entry_to_archive(struct cpio *, struct archive_entry *);
 108 static int      file_to_archive(struct cpio *, const char *);
 109 static void     free_cache(struct name_cache *cache);
 110 static void     list_item_verbose(struct cpio *, struct archive_entry *);
 111 static void     long_help(void);
 112 static const char *lookup_gname(struct cpio *, gid_t gid);
 113 static int      lookup_gname_helper(struct cpio *,
 114                     const char **name, id_t gid);
 115 static const char *lookup_uname(struct cpio *, uid_t uid);
 116 static int      lookup_uname_helper(struct cpio *,
 117                     const char **name, id_t uid);
 118 static void     mode_in(struct cpio *);
 119 static void     mode_list(struct cpio *);
 120 static void     mode_out(struct cpio *);
 121 static void     mode_pass(struct cpio *, const char *);
 122 static const char *remove_leading_slash(const char *);
 123 static int      restore_time(struct cpio *, struct archive_entry *,
 124                     const char *, int fd);
 125 static void     usage(void);
 126 static void     version(void);
 127 static const char * passphrase_callback(struct archive *, void *);
 128 static void     passphrase_free(char *);
 129
 130 int
 131 main(int argc, char *argv[])
 132 {
 133         static char buff[16384];
 134         struct cpio _cpio; /* Allocated on stack. */
 135         struct cpio *cpio;
 136         const char *errmsg;
 137         int uid, gid;
 138         int opt;
 139
 140         cpio = &_cpio;
 141         memset(cpio, 0, sizeof(*cpio));
 142         cpio->buff = buff;
 143         cpio->buff_size = sizeof(buff);
 144
 145 #if defined(HAVE_SIGACTION) && defined(SIGPIPE)
 146         { /* Ignore SIGPIPE signals. */
 147                 struct sigaction sa;
 148                 sigemptyset(&sa.sa_mask);
 149                 sa.sa_flags = 0;
 150                 sa.sa_handler = SIG_IGN;
 151                 sigaction(SIGPIPE, &sa, NULL);
 152         }
 153 #endif
 154
 155         /* Set lafe_progname before calling lafe_warnc. */
 156         lafe_setprogname(*argv, "bsdcpio");
 157
 158 #if HAVE_SETLOCALE
 159         if (setlocale(LC_ALL, "") == NULL)
 160                 lafe_warnc(0, "Failed to set default locale");
 161 #endif
 162
 163         cpio->uid_override = -1;
 164         cpio->gid_override = -1;
 165         cpio->argv = argv;
 166         cpio->argc = argc;
 167         cpio->mode = '\0';
 168         cpio->verbose = 0;
 169         cpio->compress = '\0';
 170         cpio->extract_flags = ARCHIVE_EXTRACT_NO_AUTODIR;
 171         cpio->extract_flags |= ARCHIVE_EXTRACT_NO_OVERWRITE_NEWER;
 172         cpio->extract_flags |= ARCHIVE_EXTRACT_SECURE_SYMLINKS;
 173         cpio->extract_flags |= ARCHIVE_EXTRACT_SECURE_NODOTDOT;
 174         cpio->extract_flags |= ARCHIVE_EXTRACT_SECURE_NOABSOLUTEPATHS;
 175         cpio->extract_flags |= ARCHIVE_EXTRACT_PERM;
 176         cpio->extract_flags |= ARCHIVE_EXTRACT_FFLAGS;
 177         cpio->extract_flags |= ARCHIVE_EXTRACT_ACL;
 178 #if !defined(_WIN32) && !defined(__CYGWIN__)
 179         if (geteuid() == 0)
 180                 cpio->extract_flags |= ARCHIVE_EXTRACT_OWNER;
 181 #endif
 182         cpio->bytes_per_block = 512;
 183         cpio->filename = NULL;
 184
 185         cpio->matching = archive_match_new();
 186         if (cpio->matching == NULL)
 187                 lafe_errc(1, 0, "Out of memory");
 188
 189         while ((opt = cpio_getopt(cpio)) != -1) {
 190                 switch (opt) {
 191                 case '0': /* GNU convention: --null, -0 */
 192                         cpio->option_null = 1;
 193                         break;
 194                 case 'A': /* NetBSD/OpenBSD */
 195                         cpio->option_append = 1;
 196                         break;
 197                 case 'a': /* POSIX 1997 */
 198                         cpio->option_atime_restore = 1;
 199                         break;
 200                 case 'B': /* POSIX 1997 */
 201                         cpio->bytes_per_block = 5120;
 202                         break;
 203                 case OPTION_B64ENCODE:
 204                         cpio->add_filter = opt;
 205                         break;
 206                 case 'C': /* NetBSD/OpenBSD */
 207                         cpio->bytes_per_block = atoi(cpio->argument);
 208                         if (cpio->bytes_per_block <= 0)
 209                                 lafe_errc(1, 0, "Invalid blocksize %s", cpio->argument);
 210                         break;
 211                 case 'c': /* POSIX 1997 */
 212                         cpio->format = "odc";
 213                         break;
 214                 case 'd': /* POSIX 1997 */
 215                         cpio->extract_flags &= ~ARCHIVE_EXTRACT_NO_AUTODIR;
 216                         break;
 217                 case 'E': /* NetBSD/OpenBSD */
 218                         if (archive_match_include_pattern_from_file(
 219                             cpio->matching, cpio->argument,
 220                             cpio->option_null) != ARCHIVE_OK)
 221                                 lafe_errc(1, 0, "Error : %s",
 222                                     archive_error_string(cpio->matching));
 223                         break;
 224                 case 'F': /* NetBSD/OpenBSD/GNU cpio */
 225                         cpio->filename = cpio->argument;
 226                         break;
 227                 case 'f': /* POSIX 1997 */
 228                         if (archive_match_exclude_pattern(cpio->matching,
 229                             cpio->argument) != ARCHIVE_OK)
 230                                 lafe_errc(1, 0, "Error : %s",
 231                                     archive_error_string(cpio->matching));
 232                         break;
 233                 case OPTION_GRZIP:
 234                         cpio->compress = opt;
 235                         break;
 236                 case 'H': /* GNU cpio (also --format) */
 237                         cpio->format = cpio->argument;
 238                         break;
 239                 case 'h':
 240                         long_help();
 241                         break;
 242                 case 'I': /* NetBSD/OpenBSD */
 243                         cpio->filename = cpio->argument;
 244                         break;
 245                 case 'i': /* POSIX 1997 */
 246                         if (cpio->mode != '\0')
 247                                 lafe_errc(1, 0,
 248                                     "Cannot use both -i and -%c", cpio->mode);
 249                         cpio->mode = opt;
 250                         break;
 251                 case 'J': /* GNU tar, others */
 252                         cpio->compress = opt;
 253                         break;
 254                 case 'j': /* GNU tar, others */
 255                         cpio->compress = opt;
 256                         break;
 257                 case OPTION_INSECURE:
 258                         cpio->extract_flags &= ~ARCHIVE_EXTRACT_SECURE_SYMLINKS;
 259                         cpio->extract_flags &= ~ARCHIVE_EXTRACT_SECURE_NODOTDOT;
 260                         cpio->extract_flags &= ~ARCHIVE_EXTRACT_SECURE_NOABSOLUTEPATHS;
 261                         break;
 262                 case 'L': /* GNU cpio */
 263                         cpio->option_follow_links = 1;
 264                         break;
 265                 case 'l': /* POSIX 1997 */
 266                         cpio->option_link = 1;
 267                         break;
 268                 case OPTION_LRZIP:
 269                 case OPTION_LZ4:
 270                 case OPTION_LZMA: /* GNU tar, others */
 271                 case OPTION_LZOP: /* GNU tar, others */
 272                         cpio->compress = opt;
 273                         break;
 274                 case 'm': /* POSIX 1997 */
 275                         cpio->extract_flags |= ARCHIVE_EXTRACT_TIME;
 276                         break;
 277                 case 'n': /* GNU cpio */
 278                         cpio->option_numeric_uid_gid = 1;
 279                         break;
 280                 case OPTION_NO_PRESERVE_OWNER: /* GNU cpio */
 281                         cpio->extract_flags &= ~ARCHIVE_EXTRACT_OWNER;
 282                         break;
 283                 case 'O': /* GNU cpio */
 284                         cpio->filename = cpio->argument;
 285                         break;
 286                 case 'o': /* POSIX 1997 */
 287                         if (cpio->mode != '\0')
 288                                 lafe_errc(1, 0,
 289                                     "Cannot use both -o and -%c", cpio->mode);
 290                         cpio->mode = opt;
 291                         break;
 292                 case 'p': /* POSIX 1997 */
 293                         if (cpio->mode != '\0')
 294                                 lafe_errc(1, 0,
 295                                     "Cannot use both -p and -%c", cpio->mode);
 296                         cpio->mode = opt;
 297                         cpio->extract_flags &= ~ARCHIVE_EXTRACT_SECURE_NODOTDOT;
 298                         cpio->extract_flags &= ~ARCHIVE_EXTRACT_SECURE_NOABSOLUTEPATHS;
 299                         break;
 300                 case OPTION_PASSPHRASE:
 301                         cpio->passphrase = cpio->argument;
 302                         break;
 303                 case OPTION_PRESERVE_OWNER:
 304                         cpio->extract_flags |= ARCHIVE_EXTRACT_OWNER;
 305                         break;
 306                 case OPTION_QUIET: /* GNU cpio */
 307                         cpio->quiet = 1;
 308                         break;
 309                 case 'R': /* GNU cpio, also --owner */
 310                         /* TODO: owner_parse should return uname/gname
 311                          * also; use that to set [ug]name_override. */
 312                         errmsg = owner_parse(cpio->argument, &uid, &gid);
 313                         if (errmsg) {
 314                                 lafe_warnc(-1, "%s", errmsg);
 315                                 usage();
 316                         }
 317                         if (uid != -1) {
 318                                 cpio->uid_override = uid;
 319                                 cpio->uname_override = NULL;
 320                         }
 321                         if (gid != -1) {
 322                                 cpio->gid_override = gid;
 323                                 cpio->gname_override = NULL;
 324                         }
 325                         break;
 326                 case 'r': /* POSIX 1997 */
 327                         cpio->option_rename = 1;
 328                         break;
 329                 case 't': /* POSIX 1997 */
 330                         cpio->option_list = 1;
 331                         break;
 332                 case 'u': /* POSIX 1997 */
 333                         cpio->extract_flags
 334                             &= ~ARCHIVE_EXTRACT_NO_OVERWRITE_NEWER;
 335                         break;
 336                 case OPTION_UUENCODE:
 337                         cpio->add_filter = opt;
 338                         break;
 339                 case 'v': /* POSIX 1997 */
 340                         cpio->verbose++;
 341                         break;
 342                 case 'V': /* GNU cpio */
 343                         cpio->dot++;
 344                         break;
 345                 case OPTION_VERSION: /* GNU convention */
 346                         version();
 347                         break;
 348 #if 0
 349                 /*
 350                  * cpio_getopt() handles -W specially, so it's not
 351                  * available here.
 352                  */
 353                 case 'W': /* Obscure, but useful GNU convention. */
 354                         break;
 355 #endif
 356                 case 'y': /* tar convention */
 357                         cpio->compress = opt;
 358                         break;
 359                 case 'Z': /* tar convention */
 360                         cpio->compress = opt;
 361                         break;
 362                 case 'z': /* tar convention */
 363                         cpio->compress = opt;
 364                         break;
 365                 default:
 366                         usage();
 367                 }
 368         }
 369
 370         /*
 371          * Sanity-check args, error out on nonsensical combinations.
 372          */
 373         /* -t implies -i if no mode was specified. */
 374         if (cpio->option_list && cpio->mode == '\0')
 375                 cpio->mode = 'i';
 376         /* -t requires -i */
 377         if (cpio->option_list && cpio->mode != 'i')
 378                 lafe_errc(1, 0, "Option -t requires -i");
 379         /* -n requires -it */
 380         if (cpio->option_numeric_uid_gid && !cpio->option_list)
 381                 lafe_errc(1, 0, "Option -n requires -it");
 382         /* Can only specify format when writing */
 383         if (cpio->format != NULL && cpio->mode != 'o')
 384                 lafe_errc(1, 0, "Option --format requires -o");
 385         /* -l requires -p */
 386         if (cpio->option_link && cpio->mode != 'p')
 387                 lafe_errc(1, 0, "Option -l requires -p");
 388         /* -v overrides -V */
 389         if (cpio->dot && cpio->verbose)
 390                 cpio->dot = 0;
 391         /* TODO: Flag other nonsensical combinations. */
 392
 393         switch (cpio->mode) {
 394         case 'o':
 395                 /* TODO: Implement old binary format in libarchive,
 396                    use that here. */
 397                 if (cpio->format == NULL)
 398                         cpio->format = "odc"; /* Default format */
 399
 400                 mode_out(cpio);
 401                 break;
 402         case 'i':
 403                 while (*cpio->argv != NULL) {
 404                         if (archive_match_include_pattern(cpio->matching,
 405                             *cpio->argv) != ARCHIVE_OK)
 406                                 lafe_errc(1, 0, "Error : %s",
 407                                     archive_error_string(cpio->matching));
 408                         --cpio->argc;
 409                         ++cpio->argv;
 410                 }
 411                 if (cpio->option_list)
 412                         mode_list(cpio);
 413                 else
 414                         mode_in(cpio);
 415                 break;
 416         case 'p':
 417                 if (*cpio->argv == NULL || **cpio->argv == '\0')
 418                         lafe_errc(1, 0,
 419                             "-p mode requires a target directory");
 420                 mode_pass(cpio, *cpio->argv);
 421                 break;
 422         default:
 423                 lafe_errc(1, 0,
 424                     "Must specify at least one of -i, -o, or -p");
 425         }
 426
 427         archive_match_free(cpio->matching);
 428         free_cache(cpio->gname_cache);
 429         free_cache(cpio->uname_cache);
 430         free(cpio->destdir);
 431         passphrase_free(cpio->ppbuff);
 432         return (cpio->return_value);
 433 }
 434
 435 static void
 436 usage(void)
 437 {
 438         const char      *p;
 439
 440         p = lafe_getprogname();
 441
 442         fprintf(stderr, "Brief Usage:\n");
 443         fprintf(stderr, "  List:    %s -it < archive\n", p);
 444         fprintf(stderr, "  Extract: %s -i < archive\n", p);
 445         fprintf(stderr, "  Create:  %s -o < filenames > archive\n", p);
 446         fprintf(stderr, "  Help:    %s --help\n", p);
 447         exit(1);
 448 }
 449
 450 static 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  */
 472 static void
 473 long_help(void)
 474 {
 475         const char      *prog;
 476         const char      *p;
 477
 478         prog = lafe_getprogname();
 479
 480         fflush(stderr);
 481
 482         p = (strcmp(prog,"bsdcpio") != 0) ? "(bsdcpio)" : "";
 483         printf("%s%s: manipulate archive files\n", prog, p);
 484
 485         for (p = long_help_msg; *p != '\0'; p++) {
 486                 if (*p == '%') {
 487                         if (p[1] == 'p') {
 488                                 fputs(prog, stdout);
 489                                 p++;
 490                         } else
 491                                 putchar('%');
 492                 } else
 493                         putchar(*p);
 494         }
 495         version();
 496 }
 497
 498 static void
 499 version(void)
 500 {
 501         fprintf(stdout,"bsdcpio %s -- %s\n",
 502             BSDCPIO_VERSION_STRING,
 503             archive_version_details());
 504         exit(0);
 505 }
 506
 507 static void
 508 mode_out(struct cpio *cpio)
 509 {
 510         struct archive_entry *entry, *spare;
 511         struct lafe_line_reader *lr;
 512         const char *p;
 513         int r;
 514
 515         if (cpio->option_append)
 516                 lafe_errc(1, 0, "Append mode not yet supported.");
 517
 518         cpio->archive_read_disk = archive_read_disk_new();
 519         if (cpio->archive_read_disk == NULL)
 520                 lafe_errc(1, 0, "Failed to allocate archive object");
 521         if (cpio->option_follow_links)
 522                 archive_read_disk_set_symlink_logical(cpio->archive_read_disk);
 523         else
 524                 archive_read_disk_set_symlink_physical(cpio->archive_read_disk);
 525         archive_read_disk_set_standard_lookup(cpio->archive_read_disk);
 526
 527         cpio->archive = archive_write_new();
 528         if (cpio->archive == NULL)
 529                 lafe_errc(1, 0, "Failed to allocate archive object");
 530         switch (cpio->compress) {
 531         case OPTION_GRZIP:
 532                 r = archive_write_add_filter_grzip(cpio->archive);
 533                 break;
 534         case 'J':
 535                 r = archive_write_add_filter_xz(cpio->archive);
 536                 break;
 537         case OPTION_LRZIP:
 538                 r = archive_write_add_filter_lrzip(cpio->archive);
 539                 break;
 540         case OPTION_LZ4:
 541                 r = archive_write_add_filter_lz4(cpio->archive);
 542                 break;
 543         case OPTION_LZMA:
 544                 r = archive_write_add_filter_lzma(cpio->archive);
 545                 break;
 546         case OPTION_LZOP:
 547                 r = archive_write_add_filter_lzop(cpio->archive);
 548                 break;
 549         case 'j': case 'y':
 550                 r = archive_write_add_filter_bzip2(cpio->archive);
 551                 break;
 552         case 'z':
 553                 r = archive_write_add_filter_gzip(cpio->archive);
 554                 break;
 555         case 'Z':
 556                 r = archive_write_add_filter_compress(cpio->archive);
 557                 break;
 558         default:
 559                 r = archive_write_add_filter_none(cpio->archive);
 560                 break;
 561         }
 562         if (r < ARCHIVE_WARN)
 563                 lafe_errc(1, 0, "Requested compression not available");
 564         switch (cpio->add_filter) {
 565         case 0:
 566                 r = ARCHIVE_OK;
 567                 break;
 568         case OPTION_B64ENCODE:
 569                 r = archive_write_add_filter_b64encode(cpio->archive);
 570                 break;
 571         case OPTION_UUENCODE:
 572                 r = archive_write_add_filter_uuencode(cpio->archive);
 573                 break;
 574         }
 575         if (r < ARCHIVE_WARN)
 576                 lafe_errc(1, 0, "Requested filter not available");
 577         r = archive_write_set_format_by_name(cpio->archive, cpio->format);
 578         if (r != ARCHIVE_OK)
 579                 lafe_errc(1, 0, "%s", archive_error_string(cpio->archive));
 580         archive_write_set_bytes_per_block(cpio->archive, cpio->bytes_per_block);
 581         cpio->linkresolver = archive_entry_linkresolver_new();
 582         archive_entry_linkresolver_set_strategy(cpio->linkresolver,
 583             archive_format(cpio->archive));
 584         if (cpio->passphrase != NULL)
 585                 r = archive_write_set_passphrase(cpio->archive,
 586                         cpio->passphrase);
 587         else
 588                 r = archive_write_set_passphrase_callback(cpio->archive, cpio,
 589                         &passphrase_callback);
 590         if (r != ARCHIVE_OK)
 591                 lafe_errc(1, 0, "%s", archive_error_string(cpio->archive));
 592
 593         /*
 594          * The main loop:  Copy each file into the output archive.
 595          */
 596         r = archive_write_open_filename(cpio->archive, cpio->filename);
 597         if (r != ARCHIVE_OK)
 598                 lafe_errc(1, 0, "%s", archive_error_string(cpio->archive));
 599         lr = lafe_line_reader("-", cpio->option_null);
 600         while ((p = lafe_line_reader_next(lr)) != NULL)
 601                 file_to_archive(cpio, p);
 602         lafe_line_reader_free(lr);
 603
 604         /*
 605          * The hardlink detection may have queued up a couple of entries
 606          * that can now be flushed.
 607          */
 608         entry = NULL;
 609         archive_entry_linkify(cpio->linkresolver, &entry, &spare);
 610         while (entry != NULL) {
 611                 entry_to_archive(cpio, entry);
 612                 archive_entry_free(entry);
 613                 entry = NULL;
 614                 archive_entry_linkify(cpio->linkresolver, &entry, &spare);
 615         }
 616
 617         r = archive_write_close(cpio->archive);
 618         if (cpio->dot)
 619                 fprintf(stderr, "\n");
 620         if (r != ARCHIVE_OK)
 621                 lafe_errc(1, 0, "%s", archive_error_string(cpio->archive));
 622
 623         if (!cpio->quiet) {
 624                 int64_t blocks =
 625                         (archive_filter_bytes(cpio->archive, 0) + 511)
 626                         / 512;
 627                 fprintf(stderr, "%lu %s\n", (unsigned long)blocks,
 628                     blocks == 1 ? "block" : "blocks");
 629         }
 630         archive_write_free(cpio->archive);
 631 }
 632
 633 static const char *
 634 remove_leading_slash(const char *p)
 635 {
 636         const char *rp;
 637
 638         /* Remove leading "//./" or "//?/" or "//?/UNC/"
 639          * (absolute path prefixes used by Windows API) */
 640         if ((p[0] == '/' || p[0] == '\\') &&
 641             (p[1] == '/' || p[1] == '\\') &&
 642             (p[2] == '.' || p[2] == '?') &&
 643             (p[3] == '/' || p[3] == '\\'))
 644         {
 645                 if (p[2] == '?' &&
 646                     (p[4] == 'U' || p[4] == 'u') &&
 647                     (p[5] == 'N' || p[5] == 'n') &&
 648                     (p[6] == 'C' || p[6] == 'c') &&
 649                     (p[7] == '/' || p[7] == '\\'))
 650                         p += 8;
 651                 else
 652                         p += 4;
 653         }
 654         do {
 655                 rp = p;
 656                 /* Remove leading drive letter from archives created
 657                  * on Windows. */
 658                 if (((p[0] >= 'a' && p[0] <= 'z') ||
 659                      (p[0] >= 'A' && p[0] <= 'Z')) &&
 660                          p[1] == ':') {
 661                         p += 2;
 662                 }
 663                 /* Remove leading "/../", "//", etc. */
 664                 while (p[0] == '/' || p[0] == '\\') {
 665                         if (p[1] == '.' && p[2] == '.' &&
 666                                 (p[3] == '/' || p[3] == '\\')) {
 667                                 p += 3; /* Remove "/..", leave "/"
 668                                          * for next pass. */
 669                         } else
 670                                 p += 1; /* Remove "/". */
 671                 }
 672         } while (rp != p);
 673         return (p);
 674 }
 675
 676 /*
 677  * This is used by both out mode (to copy objects from disk into
 678  * an archive) and pass mode (to copy objects from disk to
 679  * an archive_write_disk "archive").
 680  */
 681 static int
 682 file_to_archive(struct cpio *cpio, const char *srcpath)
 683 {
 684         const char *destpath;
 685         struct archive_entry *entry, *spare;
 686         size_t len;
 687         int r;
 688
 689         /*
 690          * Create an archive_entry describing the source file.
 691          *
 692          */
 693         entry = archive_entry_new();
 694         if (entry == NULL)
 695                 lafe_errc(1, 0, "Couldn't allocate entry");
 696         archive_entry_copy_sourcepath(entry, srcpath);
 697         r = archive_read_disk_entry_from_file(cpio->archive_read_disk,
 698             entry, -1, NULL);
 699         if (r < ARCHIVE_FAILED)
 700                 lafe_errc(1, 0, "%s",
 701                     archive_error_string(cpio->archive_read_disk));
 702         if (r < ARCHIVE_OK)
 703                 lafe_warnc(0, "%s",
 704                     archive_error_string(cpio->archive_read_disk));
 705         if (r <= ARCHIVE_FAILED) {
 706                 cpio->return_value = 1;
 707                 return (r);
 708         }
 709
 710         if (cpio->uid_override >= 0) {
 711                 archive_entry_set_uid(entry, cpio->uid_override);
 712                 archive_entry_set_uname(entry, cpio->uname_override);
 713         }
 714         if (cpio->gid_override >= 0) {
 715                 archive_entry_set_gid(entry, cpio->gid_override);
 716                 archive_entry_set_gname(entry, cpio->gname_override);
 717         }
 718
 719         /*
 720          * Generate a destination path for this entry.
 721          * "destination path" is the name to which it will be copied in
 722          * pass mode or the name that will go into the archive in
 723          * output mode.
 724          */
 725         destpath = srcpath;
 726         if (cpio->destdir) {
 727                 len = strlen(cpio->destdir) + strlen(srcpath) + 8;
 728                 if (len >= cpio->pass_destpath_alloc) {
 729                         while (len >= cpio->pass_destpath_alloc) {
 730                                 cpio->pass_destpath_alloc += 512;
 731                                 cpio->pass_destpath_alloc *= 2;
 732                         }
 733                         free(cpio->pass_destpath);
 734                         cpio->pass_destpath = malloc(cpio->pass_destpath_alloc);
 735                         if (cpio->pass_destpath == NULL)
 736                                 lafe_errc(1, ENOMEM,
 737                                     "Can't allocate path buffer");
 738                 }
 739                 strcpy(cpio->pass_destpath, cpio->destdir);
 740                 strcat(cpio->pass_destpath, remove_leading_slash(srcpath));
 741                 destpath = cpio->pass_destpath;
 742         }
 743         if (cpio->option_rename)
 744                 destpath = cpio_rename(destpath);
 745         if (destpath == NULL)
 746                 return (0);
 747         archive_entry_copy_pathname(entry, destpath);
 748
 749         /*
 750          * If we're trying to preserve hardlinks, match them here.
 751          */
 752         spare = NULL;
 753         if (cpio->linkresolver != NULL
 754             && archive_entry_filetype(entry) != AE_IFDIR) {
 755                 archive_entry_linkify(cpio->linkresolver, &entry, &spare);
 756         }
 757
 758         if (entry != NULL) {
 759                 r = entry_to_archive(cpio, entry);
 760                 archive_entry_free(entry);
 761                 if (spare != NULL) {
 762                         if (r == 0)
 763                                 r = entry_to_archive(cpio, spare);
 764                         archive_entry_free(spare);
 765                 }
 766         }
 767         return (r);
 768 }
 769
 770 static int
 771 entry_to_archive(struct cpio *cpio, struct archive_entry *entry)
 772 {
 773         const char *destpath = archive_entry_pathname(entry);
 774         const char *srcpath = archive_entry_sourcepath(entry);
 775         int fd = -1;
 776         ssize_t bytes_read;
 777         int r;
 778
 779         /* Print out the destination name to the user. */
 780         if (cpio->verbose)
 781                 fprintf(stderr,"%s", destpath);
 782         if (cpio->dot)
 783                 fprintf(stderr, ".");
 784
 785         /*
 786          * Option_link only makes sense in pass mode and for
 787          * regular files.  Also note: if a link operation fails
 788          * because of cross-device restrictions, we'll fall back
 789          * to copy mode for that entry.
 790          *
 791          * TODO: Test other cpio implementations to see if they
 792          * hard-link anything other than regular files here.
 793          */
 794         if (cpio->option_link
 795             && archive_entry_filetype(entry) == AE_IFREG)
 796         {
 797                 struct archive_entry *t;
 798                 /* Save the original entry in case we need it later. */
 799                 t = archive_entry_clone(entry);
 800                 if (t == NULL)
 801                         lafe_errc(1, ENOMEM, "Can't create link");
 802                 /* Note: link(2) doesn't create parent directories,
 803                  * so we use archive_write_header() instead as a
 804                  * convenience. */
 805                 archive_entry_set_hardlink(t, srcpath);
 806                 /* This is a straight link that carries no data. */
 807                 archive_entry_set_size(t, 0);
 808                 r = archive_write_header(cpio->archive, t);
 809                 archive_entry_free(t);
 810                 if (r != ARCHIVE_OK)
 811                         lafe_warnc(archive_errno(cpio->archive),
 812                             "%s", archive_error_string(cpio->archive));
 813                 if (r == ARCHIVE_FATAL)
 814                         exit(1);
 815 #ifdef EXDEV
 816                 if (r != ARCHIVE_OK && archive_errno(cpio->archive) == EXDEV) {
 817                         /* Cross-device link:  Just fall through and use
 818                          * the original entry to copy the file over. */
 819                         lafe_warnc(0, "Copying file instead");
 820                 } else
 821 #endif
 822                 return (0);
 823         }
 824
 825         /*
 826          * Make sure we can open the file (if necessary) before
 827          * trying to write the header.
 828          */
 829         if (archive_entry_filetype(entry) == AE_IFREG) {
 830                 if (archive_entry_size(entry) > 0) {
 831                         fd = open(srcpath, O_RDONLY | O_BINARY);
 832                         if (fd < 0) {
 833                                 lafe_warnc(errno,
 834                                     "%s: could not open file", srcpath);
 835                                 goto cleanup;
 836                         }
 837                 }
 838         } else {
 839                 archive_entry_set_size(entry, 0);
 840         }
 841
 842         r = archive_write_header(cpio->archive, entry);
 843
 844         if (r != ARCHIVE_OK)
 845                 lafe_warnc(archive_errno(cpio->archive),
 846                     "%s: %s",
 847                     srcpath,
 848                     archive_error_string(cpio->archive));
 849
 850         if (r == ARCHIVE_FATAL)
 851                 exit(1);
 852
 853         if (r >= ARCHIVE_WARN && archive_entry_size(entry) > 0 && fd >= 0) {
 854                 bytes_read = read(fd, cpio->buff, (unsigned)cpio->buff_size);
 855                 while (bytes_read > 0) {
 856                         ssize_t bytes_write;
 857                         bytes_write = archive_write_data(cpio->archive,
 858                             cpio->buff, bytes_read);
 859                         if (bytes_write < 0)
 860                                 lafe_errc(1, archive_errno(cpio->archive),
 861                                     "%s", archive_error_string(cpio->archive));
 862                         if (bytes_write < bytes_read) {
 863                                 lafe_warnc(0,
 864                                     "Truncated write; file may have "
 865                                     "grown while being archived.");
 866                         }
 867                         bytes_read = read(fd, cpio->buff,
 868                             (unsigned)cpio->buff_size);
 869                 }
 870         }
 871
 872         fd = restore_time(cpio, entry, srcpath, fd);
 873
 874 cleanup:
 875         if (cpio->verbose)
 876                 fprintf(stderr,"\n");
 877         if (fd >= 0)
 878                 close(fd);
 879         return (0);
 880 }
 881
 882 static int
 883 restore_time(struct cpio *cpio, struct archive_entry *entry,
 884     const char *name, int fd)
 885 {
 886 #ifndef HAVE_UTIMES
 887         static int warned = 0;
 888
 889         (void)cpio; /* UNUSED */
 890         (void)entry; /* UNUSED */
 891         (void)name; /* UNUSED */
 892
 893         if (!warned)
 894                 lafe_warnc(0, "Can't restore access times on this platform");
 895         warned = 1;
 896         return (fd);
 897 #else
 898 #if defined(_WIN32) && !defined(__CYGWIN__)
 899         struct __timeval times[2];
 900 #else
 901         struct timeval times[2];
 902 #endif
 903
 904         if (!cpio->option_atime_restore)
 905                 return (fd);
 906
 907         times[1].tv_sec = archive_entry_mtime(entry);
 908         times[1].tv_usec = archive_entry_mtime_nsec(entry) / 1000;
 909
 910         times[0].tv_sec = archive_entry_atime(entry);
 911         times[0].tv_usec = archive_entry_atime_nsec(entry) / 1000;
 912
 913 #if defined(HAVE_FUTIMES) && !defined(__CYGWIN__)
 914         if (fd >= 0 && futimes(fd, times) == 0)
 915                 return (fd);
 916 #endif
 917         /*
 918          * Some platform cannot restore access times if the file descriptor
 919          * is still opened.
 920          */
 921         if (fd >= 0) {
 922                 close(fd);
 923                 fd = -1;
 924         }
 925
 926 #ifdef HAVE_LUTIMES
 927         if (lutimes(name, times) != 0)
 928 #else
 929         if ((AE_IFLNK != archive_entry_filetype(entry))
 930                         && utimes(name, times) != 0)
 931 #endif
 932                 lafe_warnc(errno, "Can't update time for %s", name);
 933 #endif
 934         return (fd);
 935 }
 936
 937
 938 static void
 939 mode_in(struct cpio *cpio)
 940 {
 941         struct archive *a;
 942         struct archive_entry *entry;
 943         struct archive *ext;
 944         const char *destpath;
 945         int r;
 946
 947         ext = archive_write_disk_new();
 948         if (ext == NULL)
 949                 lafe_errc(1, 0, "Couldn't allocate restore object");
 950         r = archive_write_disk_set_options(ext, cpio->extract_flags);
 951         if (r != ARCHIVE_OK)
 952                 lafe_errc(1, 0, "%s", archive_error_string(ext));
 953         a = archive_read_new();
 954         if (a == NULL)
 955                 lafe_errc(1, 0, "Couldn't allocate archive object");
 956         archive_read_support_filter_all(a);
 957         archive_read_support_format_all(a);
 958         if (cpio->passphrase != NULL)
 959                 r = archive_read_add_passphrase(a, cpio->passphrase);
 960         else
 961                 r = archive_read_set_passphrase_callback(a, cpio,
 962                         &passphrase_callback);
 963         if (r != ARCHIVE_OK)
 964                 lafe_errc(1, 0, "%s", archive_error_string(a));
 965
 966         if (archive_read_open_filename(a, cpio->filename,
 967                                         cpio->bytes_per_block))
 968                 lafe_errc(1, archive_errno(a),
 969                     "%s", archive_error_string(a));
 970         for (;;) {
 971                 r = archive_read_next_header(a, &entry);
 972                 if (r == ARCHIVE_EOF)
 973                         break;
 974                 if (r != ARCHIVE_OK) {
 975                         lafe_errc(1, archive_errno(a),
 976                             "%s", archive_error_string(a));
 977                 }
 978                 if (archive_match_path_excluded(cpio->matching, entry))
 979                         continue;
 980                 if (cpio->option_rename) {
 981                         destpath = cpio_rename(archive_entry_pathname(entry));
 982                         archive_entry_set_pathname(entry, destpath);
 983                 } else
 984                         destpath = archive_entry_pathname(entry);
 985                 if (destpath == NULL)
 986                         continue;
 987                 if (cpio->verbose)
 988                         fprintf(stderr, "%s\n", destpath);
 989                 if (cpio->dot)
 990                         fprintf(stderr, ".");
 991                 if (cpio->uid_override >= 0)
 992                         archive_entry_set_uid(entry, cpio->uid_override);
 993                 if (cpio->gid_override >= 0)
 994                         archive_entry_set_gid(entry, cpio->gid_override);
 995                 r = archive_write_header(ext, entry);
 996                 if (r != ARCHIVE_OK) {
 997                         fprintf(stderr, "%s: %s\n",
 998                             archive_entry_pathname(entry),
 999                             archive_error_string(ext));
1000                 } else if (!archive_entry_size_is_set(entry)
1001                     || archive_entry_size(entry) > 0) {
1002                         r = extract_data(a, ext);
1003                         if (r != ARCHIVE_OK)
1004                                 cpio->return_value = 1;
1005                 }
1006         }
1007         r = archive_read_close(a);
1008         if (cpio->dot)
1009                 fprintf(stderr, "\n");
1010         if (r != ARCHIVE_OK)
1011                 lafe_errc(1, 0, "%s", archive_error_string(a));
1012         r = archive_write_close(ext);
1013         if (r != ARCHIVE_OK)
1014                 lafe_errc(1, 0, "%s", archive_error_string(ext));
1015         if (!cpio->quiet) {
1016                 int64_t blocks = (archive_filter_bytes(a, 0) + 511)
1017                               / 512;
1018                 fprintf(stderr, "%lu %s\n", (unsigned long)blocks,
1019                     blocks == 1 ? "block" : "blocks");
1020         }
1021         archive_read_free(a);
1022         archive_write_free(ext);
1023         exit(cpio->return_value);
1024 }
1025
1026 /*
1027  * Exits if there's a fatal error.  Returns ARCHIVE_OK
1028  * if everything is kosher.
1029  */
1030 static int
1031 extract_data(struct archive *ar, struct archive *aw)
1032 {
1033         int r;
1034         size_t size;
1035         const void *block;
1036         int64_t offset;
1037
1038         for (;;) {
1039                 r = archive_read_data_block(ar, &block, &size, &offset);
1040                 if (r == ARCHIVE_EOF)
1041                         return (ARCHIVE_OK);
1042                 if (r != ARCHIVE_OK) {
1043                         lafe_warnc(archive_errno(ar),
1044                             "%s", archive_error_string(ar));
1045                         exit(1);
1046                 }
1047                 r = (int)archive_write_data_block(aw, block, size, offset);
1048                 if (r != ARCHIVE_OK) {
1049                         lafe_warnc(archive_errno(aw),
1050                             "%s", archive_error_string(aw));
1051                         return (r);
1052                 }
1053         }
1054 }
1055
1056 static void
1057 mode_list(struct cpio *cpio)
1058 {
1059         struct archive *a;
1060         struct archive_entry *entry;
1061         int r;
1062
1063         a = archive_read_new();
1064         if (a == NULL)
1065                 lafe_errc(1, 0, "Couldn't allocate archive object");
1066         archive_read_support_filter_all(a);
1067         archive_read_support_format_all(a);
1068         if (cpio->passphrase != NULL)
1069                 r = archive_read_add_passphrase(a, cpio->passphrase);
1070         else
1071                 r = archive_read_set_passphrase_callback(a, cpio,
1072                         &passphrase_callback);
1073         if (r != ARCHIVE_OK)
1074                 lafe_errc(1, 0, "%s", archive_error_string(a));
1075
1076         if (archive_read_open_filename(a, cpio->filename,
1077                                         cpio->bytes_per_block))
1078                 lafe_errc(1, archive_errno(a),
1079                     "%s", archive_error_string(a));
1080         for (;;) {
1081                 r = archive_read_next_header(a, &entry);
1082                 if (r == ARCHIVE_EOF)
1083                         break;
1084                 if (r != ARCHIVE_OK) {
1085                         lafe_errc(1, archive_errno(a),
1086                             "%s", archive_error_string(a));
1087                 }
1088                 if (archive_match_path_excluded(cpio->matching, entry))
1089                         continue;
1090                 if (cpio->verbose)
1091                         list_item_verbose(cpio, entry);
1092                 else
1093                         fprintf(stdout, "%s\n", archive_entry_pathname(entry));
1094         }
1095         r = archive_read_close(a);
1096         if (r != ARCHIVE_OK)
1097                 lafe_errc(1, 0, "%s", archive_error_string(a));
1098         if (!cpio->quiet) {
1099                 int64_t blocks = (archive_filter_bytes(a, 0) + 511)
1100                               / 512;
1101                 fprintf(stderr, "%lu %s\n", (unsigned long)blocks,
1102                     blocks == 1 ? "block" : "blocks");
1103         }
1104         archive_read_free(a);
1105         exit(0);
1106 }
1107
1108 /*
1109  * Display information about the current file.
1110  *
1111  * The format here roughly duplicates the output of 'ls -l'.
1112  * This is based on SUSv2, where 'tar tv' is documented as
1113  * listing additional information in an "unspecified format,"
1114  * and 'pax -l' is documented as using the same format as 'ls -l'.
1115  */
1116 static void
1117 list_item_verbose(struct cpio *cpio, struct archive_entry *entry)
1118 {
1119         char                     size[32];
1120         char                     date[32];
1121         char                     uids[16], gids[16];
1122         const char              *uname, *gname;
1123         FILE                    *out = stdout;
1124         const char              *fmt;
1125         time_t                   mtime;
1126         static time_t            now;
1127
1128         if (!now)
1129                 time(&now);
1130
1131         if (cpio->option_numeric_uid_gid) {
1132                 /* Format numeric uid/gid for display. */
1133                 strcpy(uids, cpio_i64toa(archive_entry_uid(entry)));
1134                 uname = uids;
1135                 strcpy(gids, cpio_i64toa(archive_entry_gid(entry)));
1136                 gname = gids;
1137         } else {
1138                 /* Use uname if it's present, else lookup name from uid. */
1139                 uname = archive_entry_uname(entry);
1140                 if (uname == NULL)
1141                         uname = lookup_uname(cpio, (uid_t)archive_entry_uid(entry));
1142                 /* Use gname if it's present, else lookup name from gid. */
1143                 gname = archive_entry_gname(entry);
1144                 if (gname == NULL)
1145                         gname = lookup_gname(cpio, (uid_t)archive_entry_gid(entry));
1146         }
1147
1148         /* Print device number or file size. */
1149         if (archive_entry_filetype(entry) == AE_IFCHR
1150             || archive_entry_filetype(entry) == AE_IFBLK) {
1151                 snprintf(size, sizeof(size), "%lu,%lu",
1152                     (unsigned long)archive_entry_rdevmajor(entry),
1153                     (unsigned long)archive_entry_rdevminor(entry));
1154         } else {
1155                 strcpy(size, cpio_i64toa(archive_entry_size(entry)));
1156         }
1157
1158         /* Format the time using 'ls -l' conventions. */
1159         mtime = archive_entry_mtime(entry);
1160 #if defined(_WIN32) && !defined(__CYGWIN__)
1161         /* Windows' strftime function does not support %e format. */
1162         if (mtime - now > 365*86400/2
1163                 || mtime - now < -365*86400/2)
1164                 fmt = cpio->day_first ? "%d %b  %Y" : "%b %d  %Y";
1165         else
1166                 fmt = cpio->day_first ? "%d %b %H:%M" : "%b %d %H:%M";
1167 #else
1168         if (mtime - now > 365*86400/2
1169                 || mtime - now < -365*86400/2)
1170                 fmt = cpio->day_first ? "%e %b  %Y" : "%b %e  %Y";
1171         else
1172                 fmt = cpio->day_first ? "%e %b %H:%M" : "%b %e %H:%M";
1173 #endif
1174         strftime(date, sizeof(date), fmt, localtime(&mtime));
1175
1176         fprintf(out, "%s%3d %-8s %-8s %8s %12s %s",
1177             archive_entry_strmode(entry),
1178             archive_entry_nlink(entry),
1179             uname, gname, size, date,
1180             archive_entry_pathname(entry));
1181
1182         /* Extra information for links. */
1183         if (archive_entry_hardlink(entry)) /* Hard link */
1184                 fprintf(out, " link to %s", archive_entry_hardlink(entry));
1185         else if (archive_entry_symlink(entry)) /* Symbolic link */
1186                 fprintf(out, " -> %s", archive_entry_symlink(entry));
1187         fprintf(out, "\n");
1188 }
1189
1190 static void
1191 mode_pass(struct cpio *cpio, const char *destdir)
1192 {
1193         struct lafe_line_reader *lr;
1194         const char *p;
1195         int r;
1196
1197         /* Ensure target dir has a trailing '/' to simplify path surgery. */
1198         cpio->destdir = malloc(strlen(destdir) + 8);
1199         strcpy(cpio->destdir, destdir);
1200         if (destdir[strlen(destdir) - 1] != '/')
1201                 strcat(cpio->destdir, "/");
1202
1203         cpio->archive = archive_write_disk_new();
1204         if (cpio->archive == NULL)
1205                 lafe_errc(1, 0, "Failed to allocate archive object");
1206         r = archive_write_disk_set_options(cpio->archive, cpio->extract_flags);
1207         if (r != ARCHIVE_OK)
1208                 lafe_errc(1, 0, "%s", archive_error_string(cpio->archive));
1209         cpio->linkresolver = archive_entry_linkresolver_new();
1210         archive_write_disk_set_standard_lookup(cpio->archive);
1211
1212         cpio->archive_read_disk = archive_read_disk_new();
1213         if (cpio->archive_read_disk == NULL)
1214                 lafe_errc(1, 0, "Failed to allocate archive object");
1215         if (cpio->option_follow_links)
1216                 archive_read_disk_set_symlink_logical(cpio->archive_read_disk);
1217         else
1218                 archive_read_disk_set_symlink_physical(cpio->archive_read_disk);
1219         archive_read_disk_set_standard_lookup(cpio->archive_read_disk);
1220
1221         lr = lafe_line_reader("-", cpio->option_null);
1222         while ((p = lafe_line_reader_next(lr)) != NULL)
1223                 file_to_archive(cpio, p);
1224         lafe_line_reader_free(lr);
1225
1226         archive_entry_linkresolver_free(cpio->linkresolver);
1227         r = archive_write_close(cpio->archive);
1228         if (cpio->dot)
1229                 fprintf(stderr, "\n");
1230         if (r != ARCHIVE_OK)
1231                 lafe_errc(1, 0, "%s", archive_error_string(cpio->archive));
1232
1233         if (!cpio->quiet) {
1234                 int64_t blocks =
1235                         (archive_filter_bytes(cpio->archive, 0) + 511)
1236                         / 512;
1237                 fprintf(stderr, "%lu %s\n", (unsigned long)blocks,
1238                     blocks == 1 ? "block" : "blocks");
1239         }
1240
1241         archive_write_free(cpio->archive);
1242 }
1243
1244 /*
1245  * Prompt for a new name for this entry.  Returns a pointer to the
1246  * new name or NULL if the entry should not be copied.  This
1247  * implements the semantics defined in POSIX.1-1996, which specifies
1248  * that an input of '.' means the name should be unchanged.  GNU cpio
1249  * treats '.' as a literal new name.
1250  */
1251 static const char *
1252 cpio_rename(const char *name)
1253 {
1254         static char buff[1024];
1255         FILE *t;
1256         char *p, *ret;
1257 #if defined(_WIN32) && !defined(__CYGWIN__)
1258         FILE *to;
1259
1260         t = fopen("CONIN$", "r");
1261         if (t == NULL)
1262                 return (name);
1263         to = fopen("CONOUT$", "w");
1264         if (to == NULL) {
1265                 fclose(t);
1266                 return (name);
1267         }
1268         fprintf(to, "%s (Enter/./(new name))? ", name);
1269         fclose(to);
1270 #else
1271         t = fopen("/dev/tty", "r+");
1272         if (t == NULL)
1273                 return (name);
1274         fprintf(t, "%s (Enter/./(new name))? ", name);
1275         fflush(t);
1276 #endif
1277
1278         p = fgets(buff, sizeof(buff), t);
1279         fclose(t);
1280         if (p == NULL)
1281                 /* End-of-file is a blank line. */
1282                 return (NULL);
1283
1284         while (*p == ' ' || *p == '\t')
1285                 ++p;
1286         if (*p == '\n' || *p == '\0')
1287                 /* Empty line. */
1288                 return (NULL);
1289         if (*p == '.' && p[1] == '\n')
1290                 /* Single period preserves original name. */
1291                 return (name);
1292         ret = p;
1293         /* Trim the final newline. */
1294         while (*p != '\0' && *p != '\n')
1295                 ++p;
1296         /* Overwrite the final \n with a null character. */
1297         *p = '\0';
1298         return (ret);
1299 }
1300
1301 static void
1302 free_cache(struct name_cache *cache)
1303 {
1304         size_t i;
1305
1306         if (cache != NULL) {
1307                 for (i = 0; i < cache->size; i++)
1308                         free(cache->cache[i].name);
1309                 free(cache);
1310         }
1311 }
1312
1313 /*
1314  * Lookup uname/gname from uid/gid, return NULL if no match.
1315  */
1316 static const char *
1317 lookup_name(struct cpio *cpio, struct name_cache **name_cache_variable,
1318     int (*lookup_fn)(struct cpio *, const char **, id_t), id_t id)
1319 {
1320         char asnum[16];
1321         struct name_cache       *cache;
1322         const char *name;
1323         int slot;
1324
1325
1326         if (*name_cache_variable == NULL) {
1327                 *name_cache_variable = malloc(sizeof(struct name_cache));
1328                 if (*name_cache_variable == NULL)
1329                         lafe_errc(1, ENOMEM, "No more memory");
1330                 memset(*name_cache_variable, 0, sizeof(struct name_cache));
1331                 (*name_cache_variable)->size = name_cache_size;
1332         }
1333
1334         cache = *name_cache_variable;
1335         cache->probes++;
1336
1337         slot = id % cache->size;
1338         if (cache->cache[slot].name != NULL) {
1339                 if (cache->cache[slot].id == id) {
1340                         cache->hits++;
1341                         return (cache->cache[slot].name);
1342                 }
1343                 free(cache->cache[slot].name);
1344                 cache->cache[slot].name = NULL;
1345         }
1346
1347         if (lookup_fn(cpio, &name, id) == 0) {
1348                 if (name == NULL || name[0] == '\0') {
1349                         /* If lookup failed, format it as a number. */
1350                         snprintf(asnum, sizeof(asnum), "%u", (unsigned)id);
1351                         name = asnum;
1352                 }
1353                 cache->cache[slot].name = strdup(name);
1354                 if (cache->cache[slot].name != NULL) {
1355                         cache->cache[slot].id = id;
1356                         return (cache->cache[slot].name);
1357                 }
1358                 /*
1359                  * Conveniently, NULL marks an empty slot, so
1360                  * if the strdup() fails, we've just failed to
1361                  * cache it.  No recovery necessary.
1362                  */
1363         }
1364         return (NULL);
1365 }
1366
1367 static const char *
1368 lookup_uname(struct cpio *cpio, uid_t uid)
1369 {
1370         return (lookup_name(cpio, &cpio->uname_cache,
1371                     &lookup_uname_helper, (id_t)uid));
1372 }
1373
1374 static int
1375 lookup_uname_helper(struct cpio *cpio, const char **name, id_t id)
1376 {
1377         struct passwd   *pwent;
1378
1379         (void)cpio; /* UNUSED */
1380
1381         errno = 0;
1382         pwent = getpwuid((uid_t)id);
1383         if (pwent == NULL) {
1384                 *name = NULL;
1385                 if (errno != 0 && errno != ENOENT)
1386                         lafe_warnc(errno, "getpwuid(%s) failed",
1387                             cpio_i64toa((int64_t)id));
1388                 return (errno);
1389         }
1390
1391         *name = pwent->pw_name;
1392         return (0);
1393 }
1394
1395 static const char *
1396 lookup_gname(struct cpio *cpio, gid_t gid)
1397 {
1398         return (lookup_name(cpio, &cpio->gname_cache,
1399                     &lookup_gname_helper, (id_t)gid));
1400 }
1401
1402 static int
1403 lookup_gname_helper(struct cpio *cpio, const char **name, id_t id)
1404 {
1405         struct group    *grent;
1406
1407         (void)cpio; /* UNUSED */
1408
1409         errno = 0;
1410         grent = getgrgid((gid_t)id);
1411         if (grent == NULL) {
1412                 *name = NULL;
1413                 if (errno != 0)
1414                         lafe_warnc(errno, "getgrgid(%s) failed",
1415                             cpio_i64toa((int64_t)id));
1416                 return (errno);
1417         }
1418
1419         *name = grent->gr_name;
1420         return (0);
1421 }
1422
1423 /*
1424  * It would be nice to just use printf() for formatting large numbers,
1425  * but the compatibility problems are a big headache.  Hence the
1426  * following simple utility function.
1427  */
1428 const char *
1429 cpio_i64toa(int64_t n0)
1430 {
1431         /* 2^64 =~ 1.8 * 10^19, so 20 decimal digits suffice.
1432          * We also need 1 byte for '-' and 1 for '\0'.
1433          */
1434         static char buff[22];
1435         int64_t n = n0 < 0 ? -n0 : n0;
1436         char *p = buff + sizeof(buff);
1437
1438         *--p = '\0';
1439         do {
1440                 *--p = '0' + (int)(n % 10);
1441                 n /= 10;
1442         } while (n > 0);
1443         if (n0 < 0)
1444                 *--p = '-';
1445         return p;
1446 }
1447
1448 #define PPBUFF_SIZE 1024
1449 static const char *
1450 passphrase_callback(struct archive *a, void *_client_data)
1451 {
1452         struct cpio *cpio = (struct cpio *)_client_data;
1453         (void)a; /* UNUSED */
1454
1455         if (cpio->ppbuff == NULL) {
1456                 cpio->ppbuff = malloc(PPBUFF_SIZE);
1457                 if (cpio->ppbuff == NULL)
1458                         lafe_errc(1, errno, "Out of memory");
1459         }
1460         return lafe_readpassphrase("Enter passphrase:",
1461                 cpio->ppbuff, PPBUFF_SIZE);
1462 }
1463
1464 static void
1465 passphrase_free(char *ppbuff)
1466 {
1467         if (ppbuff != NULL) {
1468                 memset(ppbuff, 0, PPBUFF_SIZE);
1469                 free(ppbuff);
1470         }
1471 }