contrib/libarchive/libarchive/archive_read_support_format_iso9660.c

   1 /*-
   2  * Copyright (c) 2003-2007 Tim Kientzle
   3  * Copyright (c) 2009 Andreas Henriksson <andreas@fatal.se>
   4  * Copyright (c) 2009-2012 Michihiro NAKAJIMA
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
  17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  19  * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
  20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  21  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  22  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  23  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  25  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  26  */
  27
  28 #include "archive_platform.h"
  29 __FBSDID("$FreeBSD: head/lib/libarchive/archive_read_support_format_iso9660.c 201246 2009-12-30 05:30:35Z kientzle $");
  30
  31 #ifdef HAVE_ERRNO_H
  32 #include <errno.h>
  33 #endif
  34 /* #include <stdint.h> */ /* See archive_platform.h */
  35 #include <stdio.h>
  36 #ifdef HAVE_STDLIB_H
  37 #include <stdlib.h>
  38 #endif
  39 #ifdef HAVE_STRING_H
  40 #include <string.h>
  41 #endif
  42 #include <time.h>
  43 #ifdef HAVE_ZLIB_H
  44 #include <zlib.h>
  45 #endif
  46
  47 #include "archive.h"
  48 #include "archive_endian.h"
  49 #include "archive_entry.h"
  50 #include "archive_entry_locale.h"
  51 #include "archive_private.h"
  52 #include "archive_read_private.h"
  53 #include "archive_string.h"
  54
  55 /*
  56  * An overview of ISO 9660 format:
  57  *
  58  * Each disk is laid out as follows:
  59  *   * 32k reserved for private use
  60  *   * Volume descriptor table.  Each volume descriptor
  61  *     is 2k and specifies basic format information.
  62  *     The "Primary Volume Descriptor" (PVD) is defined by the
  63  *     standard and should always be present; other volume
  64  *     descriptors include various vendor-specific extensions.
  65  *   * Files and directories.  Each file/dir is specified by
  66  *     an "extent" (starting sector and length in bytes).
  67  *     Dirs are just files with directory records packed one
  68  *     after another.  The PVD contains a single dir entry
  69  *     specifying the location of the root directory.  Everything
  70  *     else follows from there.
  71  *
  72  * This module works by first reading the volume descriptors, then
  73  * building a list of directory entries, sorted by starting
  74  * sector.  At each step, I look for the earliest dir entry that
  75  * hasn't yet been read, seek forward to that location and read
  76  * that entry.  If it's a dir, I slurp in the new dir entries and
  77  * add them to the heap; if it's a regular file, I return the
  78  * corresponding archive_entry and wait for the client to request
  79  * the file body.  This strategy allows us to read most compliant
  80  * CDs with a single pass through the data, as required by libarchive.
  81  */
  82 #define LOGICAL_BLOCK_SIZE      2048
  83 #define SYSTEM_AREA_BLOCK       16
  84
  85 /* Structure of on-disk primary volume descriptor. */
  86 #define PVD_type_offset 0
  87 #define PVD_type_size 1
  88 #define PVD_id_offset (PVD_type_offset + PVD_type_size)
  89 #define PVD_id_size 5
  90 #define PVD_version_offset (PVD_id_offset + PVD_id_size)
  91 #define PVD_version_size 1
  92 #define PVD_reserved1_offset (PVD_version_offset + PVD_version_size)
  93 #define PVD_reserved1_size 1
  94 #define PVD_system_id_offset (PVD_reserved1_offset + PVD_reserved1_size)
  95 #define PVD_system_id_size 32
  96 #define PVD_volume_id_offset (PVD_system_id_offset + PVD_system_id_size)
  97 #define PVD_volume_id_size 32
  98 #define PVD_reserved2_offset (PVD_volume_id_offset + PVD_volume_id_size)
  99 #define PVD_reserved2_size 8
 100 #define PVD_volume_space_size_offset (PVD_reserved2_offset + PVD_reserved2_size)
 101 #define PVD_volume_space_size_size 8
 102 #define PVD_reserved3_offset (PVD_volume_space_size_offset + PVD_volume_space_size_size)
 103 #define PVD_reserved3_size 32
 104 #define PVD_volume_set_size_offset (PVD_reserved3_offset + PVD_reserved3_size)
 105 #define PVD_volume_set_size_size 4
 106 #define PVD_volume_sequence_number_offset (PVD_volume_set_size_offset + PVD_volume_set_size_size)
 107 #define PVD_volume_sequence_number_size 4
 108 #define PVD_logical_block_size_offset (PVD_volume_sequence_number_offset + PVD_volume_sequence_number_size)
 109 #define PVD_logical_block_size_size 4
 110 #define PVD_path_table_size_offset (PVD_logical_block_size_offset + PVD_logical_block_size_size)
 111 #define PVD_path_table_size_size 8
 112 #define PVD_type_1_path_table_offset (PVD_path_table_size_offset + PVD_path_table_size_size)
 113 #define PVD_type_1_path_table_size 4
 114 #define PVD_opt_type_1_path_table_offset (PVD_type_1_path_table_offset + PVD_type_1_path_table_size)
 115 #define PVD_opt_type_1_path_table_size 4
 116 #define PVD_type_m_path_table_offset (PVD_opt_type_1_path_table_offset + PVD_opt_type_1_path_table_size)
 117 #define PVD_type_m_path_table_size 4
 118 #define PVD_opt_type_m_path_table_offset (PVD_type_m_path_table_offset + PVD_type_m_path_table_size)
 119 #define PVD_opt_type_m_path_table_size 4
 120 #define PVD_root_directory_record_offset (PVD_opt_type_m_path_table_offset + PVD_opt_type_m_path_table_size)
 121 #define PVD_root_directory_record_size 34
 122 #define PVD_volume_set_id_offset (PVD_root_directory_record_offset + PVD_root_directory_record_size)
 123 #define PVD_volume_set_id_size 128
 124 #define PVD_publisher_id_offset (PVD_volume_set_id_offset + PVD_volume_set_id_size)
 125 #define PVD_publisher_id_size 128
 126 #define PVD_preparer_id_offset (PVD_publisher_id_offset + PVD_publisher_id_size)
 127 #define PVD_preparer_id_size 128
 128 #define PVD_application_id_offset (PVD_preparer_id_offset + PVD_preparer_id_size)
 129 #define PVD_application_id_size 128
 130 #define PVD_copyright_file_id_offset (PVD_application_id_offset + PVD_application_id_size)
 131 #define PVD_copyright_file_id_size 37
 132 #define PVD_abstract_file_id_offset (PVD_copyright_file_id_offset + PVD_copyright_file_id_size)
 133 #define PVD_abstract_file_id_size 37
 134 #define PVD_bibliographic_file_id_offset (PVD_abstract_file_id_offset + PVD_abstract_file_id_size)
 135 #define PVD_bibliographic_file_id_size 37
 136 #define PVD_creation_date_offset (PVD_bibliographic_file_id_offset + PVD_bibliographic_file_id_size)
 137 #define PVD_creation_date_size 17
 138 #define PVD_modification_date_offset (PVD_creation_date_offset + PVD_creation_date_size)
 139 #define PVD_modification_date_size 17
 140 #define PVD_expiration_date_offset (PVD_modification_date_offset + PVD_modification_date_size)
 141 #define PVD_expiration_date_size 17
 142 #define PVD_effective_date_offset (PVD_expiration_date_offset + PVD_expiration_date_size)
 143 #define PVD_effective_date_size 17
 144 #define PVD_file_structure_version_offset (PVD_effective_date_offset + PVD_effective_date_size)
 145 #define PVD_file_structure_version_size 1
 146 #define PVD_reserved4_offset (PVD_file_structure_version_offset + PVD_file_structure_version_size)
 147 #define PVD_reserved4_size 1
 148 #define PVD_application_data_offset (PVD_reserved4_offset + PVD_reserved4_size)
 149 #define PVD_application_data_size 512
 150 #define PVD_reserved5_offset (PVD_application_data_offset + PVD_application_data_size)
 151 #define PVD_reserved5_size (2048 - PVD_reserved5_offset)
 152
 153 /* TODO: It would make future maintenance easier to just hardcode the
 154  * above values.  In particular, ECMA119 states the offsets as part of
 155  * the standard.  That would eliminate the need for the following check.*/
 156 #if PVD_reserved5_offset != 1395
 157 #error PVD offset and size definitions are wrong.
 158 #endif
 159
 160
 161 /* Structure of optional on-disk supplementary volume descriptor. */
 162 #define SVD_type_offset 0
 163 #define SVD_type_size 1
 164 #define SVD_id_offset (SVD_type_offset + SVD_type_size)
 165 #define SVD_id_size 5
 166 #define SVD_version_offset (SVD_id_offset + SVD_id_size)
 167 #define SVD_version_size 1
 168 /* ... */
 169 #define SVD_reserved1_offset    72
 170 #define SVD_reserved1_size      8
 171 #define SVD_volume_space_size_offset 80
 172 #define SVD_volume_space_size_size 8
 173 #define SVD_escape_sequences_offset (SVD_volume_space_size_offset + SVD_volume_space_size_size)
 174 #define SVD_escape_sequences_size 32
 175 /* ... */
 176 #define SVD_logical_block_size_offset 128
 177 #define SVD_logical_block_size_size 4
 178 #define SVD_type_L_path_table_offset 140
 179 #define SVD_type_M_path_table_offset 148
 180 /* ... */
 181 #define SVD_root_directory_record_offset 156
 182 #define SVD_root_directory_record_size 34
 183 #define SVD_file_structure_version_offset 881
 184 #define SVD_reserved2_offset    882
 185 #define SVD_reserved2_size      1
 186 #define SVD_reserved3_offset    1395
 187 #define SVD_reserved3_size      653
 188 /* ... */
 189 /* FIXME: validate correctness of last SVD entry offset. */
 190
 191 /* Structure of an on-disk directory record. */
 192 /* Note:  ISO9660 stores each multi-byte integer twice, once in
 193  * each byte order.  The sizes here are the size of just one
 194  * of the two integers.  (This is why the offset of a field isn't
 195  * the same as the offset+size of the previous field.) */
 196 #define DR_length_offset 0
 197 #define DR_length_size 1
 198 #define DR_ext_attr_length_offset 1
 199 #define DR_ext_attr_length_size 1
 200 #define DR_extent_offset 2
 201 #define DR_extent_size 4
 202 #define DR_size_offset 10
 203 #define DR_size_size 4
 204 #define DR_date_offset 18
 205 #define DR_date_size 7
 206 #define DR_flags_offset 25
 207 #define DR_flags_size 1
 208 #define DR_file_unit_size_offset 26
 209 #define DR_file_unit_size_size 1
 210 #define DR_interleave_offset 27
 211 #define DR_interleave_size 1
 212 #define DR_volume_sequence_number_offset 28
 213 #define DR_volume_sequence_number_size 2
 214 #define DR_name_len_offset 32
 215 #define DR_name_len_size 1
 216 #define DR_name_offset 33
 217
 218 #ifdef HAVE_ZLIB_H
 219 static const unsigned char zisofs_magic[8] = {
 220         0x37, 0xE4, 0x53, 0x96, 0xC9, 0xDB, 0xD6, 0x07
 221 };
 222
 223 struct zisofs {
 224         /* Set 1 if this file compressed by paged zlib */
 225         int              pz;
 226         int              pz_log2_bs; /* Log2 of block size */
 227         uint64_t         pz_uncompressed_size;
 228
 229         int              initialized;
 230         unsigned char   *uncompressed_buffer;
 231         size_t           uncompressed_buffer_size;
 232
 233         uint32_t         pz_offset;
 234         unsigned char    header[16];
 235         size_t           header_avail;
 236         int              header_passed;
 237         unsigned char   *block_pointers;
 238         size_t           block_pointers_alloc;
 239         size_t           block_pointers_size;
 240         size_t           block_pointers_avail;
 241         size_t           block_off;
 242         uint32_t         block_avail;
 243
 244         z_stream         stream;
 245         int              stream_valid;
 246 };
 247 #else
 248 struct zisofs {
 249         /* Set 1 if this file compressed by paged zlib */
 250         int              pz;
 251 };
 252 #endif
 253
 254 struct content {
 255         uint64_t         offset;/* Offset on disk.              */
 256         uint64_t         size;  /* File size in bytes.          */
 257         struct content  *next;
 258 };
 259
 260 /* In-memory storage for a directory record. */
 261 struct file_info {
 262         struct file_info        *use_next;
 263         struct file_info        *parent;
 264         struct file_info        *next;
 265         struct file_info        *re_next;
 266         int              subdirs;
 267         uint64_t         key;           /* Heap Key.                    */
 268         uint64_t         offset;        /* Offset on disk.              */
 269         uint64_t         size;          /* File size in bytes.          */
 270         uint32_t         ce_offset;     /* Offset of CE.                */
 271         uint32_t         ce_size;       /* Size of CE.                  */
 272         char             rr_moved;      /* Flag to rr_moved.            */
 273         char             rr_moved_has_re_only;
 274         char             re;            /* Having RRIP "RE" extension.  */
 275         char             re_descendant;
 276         uint64_t         cl_offset;     /* Having RRIP "CL" extension.  */
 277         int              birthtime_is_set;
 278         time_t           birthtime;     /* File created time.           */
 279         time_t           mtime;         /* File last modified time.     */
 280         time_t           atime;         /* File last accessed time.     */
 281         time_t           ctime;         /* File attribute change time.  */
 282         uint64_t         rdev;          /* Device number.               */
 283         mode_t           mode;
 284         uid_t            uid;
 285         gid_t            gid;
 286         int64_t          number;
 287         int              nlinks;
 288         struct archive_string name; /* Pathname */
 289         unsigned char   *utf16be_name;
 290         size_t           utf16be_bytes;
 291         char             name_continues; /* Non-zero if name continues */
 292         struct archive_string symlink;
 293         char             symlink_continues; /* Non-zero if link continues */
 294         /* Set 1 if this file compressed by paged zlib(zisofs) */
 295         int              pz;
 296         int              pz_log2_bs; /* Log2 of block size */
 297         uint64_t         pz_uncompressed_size;
 298         /* Set 1 if this file is multi extent. */
 299         int              multi_extent;
 300         struct {
 301                 struct content  *first;
 302                 struct content  **last;
 303         } contents;
 304         struct {
 305                 struct file_info        *first;
 306                 struct file_info        **last;
 307         } rede_files;
 308 };
 309
 310 struct heap_queue {
 311         struct file_info **files;
 312         int              allocated;
 313         int              used;
 314 };
 315
 316 struct iso9660 {
 317         int     magic;
 318 #define ISO9660_MAGIC   0x96609660
 319
 320         int opt_support_joliet;
 321         int opt_support_rockridge;
 322
 323         struct archive_string pathname;
 324         char    seenRockridge;  /* Set true if RR extensions are used. */
 325         char    seenSUSP;       /* Set true if SUSP is beging used. */
 326         char    seenJoliet;
 327
 328         unsigned char   suspOffset;
 329         struct file_info *rr_moved;
 330         struct read_ce_queue {
 331                 struct read_ce_req {
 332                         uint64_t         offset;/* Offset of CE on disk. */
 333                         struct file_info *file;
 334                 }               *reqs;
 335                 int              cnt;
 336                 int              allocated;
 337         }       read_ce_req;
 338
 339         int64_t         previous_number;
 340         struct archive_string previous_pathname;
 341
 342         struct file_info                *use_files;
 343         struct heap_queue                pending_files;
 344         struct {
 345                 struct file_info        *first;
 346                 struct file_info        **last;
 347         }       cache_files;
 348         struct {
 349                 struct file_info        *first;
 350                 struct file_info        **last;
 351         }       re_files;
 352
 353         uint64_t current_position;
 354         ssize_t logical_block_size;
 355         uint64_t volume_size; /* Total size of volume in bytes. */
 356         int32_t  volume_block;/* Total size of volume in logical blocks. */
 357
 358         struct vd {
 359                 int             location;       /* Location of Extent.  */
 360                 uint32_t        size;
 361         } primary, joliet;
 362
 363         int64_t entry_sparse_offset;
 364         int64_t entry_bytes_remaining;
 365         size_t  entry_bytes_unconsumed;
 366         struct zisofs    entry_zisofs;
 367         struct content  *entry_content;
 368         struct archive_string_conv *sconv_utf16be;
 369         /*
 370          * Buffers for a full pathname in UTF-16BE in Joliet extensions.
 371          */
 372 #define UTF16_NAME_MAX  1024
 373         unsigned char *utf16be_path;
 374         size_t           utf16be_path_len;
 375         unsigned char *utf16be_previous_path;
 376         size_t           utf16be_previous_path_len;
 377         /* Null buufer used in bidder to improve its performance. */
 378         unsigned char    null[2048];
 379 };
 380
 381 static int      archive_read_format_iso9660_bid(struct archive_read *, int);
 382 static int      archive_read_format_iso9660_options(struct archive_read *,
 383                     const char *, const char *);
 384 static int      archive_read_format_iso9660_cleanup(struct archive_read *);
 385 static int      archive_read_format_iso9660_read_data(struct archive_read *,
 386                     const void **, size_t *, int64_t *);
 387 static int      archive_read_format_iso9660_read_data_skip(struct archive_read *);
 388 static int      archive_read_format_iso9660_read_header(struct archive_read *,
 389                     struct archive_entry *);
 390 static const char *build_pathname(struct archive_string *, struct file_info *);
 391 static int      build_pathname_utf16be(unsigned char *, size_t, size_t *,
 392                     struct file_info *);
 393 #if DEBUG
 394 static void     dump_isodirrec(FILE *, const unsigned char *isodirrec);
 395 #endif
 396 static time_t   time_from_tm(struct tm *);
 397 static time_t   isodate17(const unsigned char *);
 398 static time_t   isodate7(const unsigned char *);
 399 static int      isBootRecord(struct iso9660 *, const unsigned char *);
 400 static int      isVolumePartition(struct iso9660 *, const unsigned char *);
 401 static int      isVDSetTerminator(struct iso9660 *, const unsigned char *);
 402 static int      isJolietSVD(struct iso9660 *, const unsigned char *);
 403 static int      isSVD(struct iso9660 *, const unsigned char *);
 404 static int      isEVD(struct iso9660 *, const unsigned char *);
 405 static int      isPVD(struct iso9660 *, const unsigned char *);
 406 static int      next_cache_entry(struct archive_read *, struct iso9660 *,
 407                     struct file_info **);
 408 static int      next_entry_seek(struct archive_read *, struct iso9660 *,
 409                     struct file_info **);
 410 static struct file_info *
 411                 parse_file_info(struct archive_read *a,
 412                     struct file_info *parent, const unsigned char *isodirrec);
 413 static int      parse_rockridge(struct archive_read *a,
 414                     struct file_info *file, const unsigned char *start,
 415                     const unsigned char *end);
 416 static int      register_CE(struct archive_read *a, int32_t location,
 417                     struct file_info *file);
 418 static int      read_CE(struct archive_read *a, struct iso9660 *iso9660);
 419 static void     parse_rockridge_NM1(struct file_info *,
 420                     const unsigned char *, int);
 421 static void     parse_rockridge_SL1(struct file_info *,
 422                     const unsigned char *, int);
 423 static void     parse_rockridge_TF1(struct file_info *,
 424                     const unsigned char *, int);
 425 static void     parse_rockridge_ZF1(struct file_info *,
 426                     const unsigned char *, int);
 427 static void     register_file(struct iso9660 *, struct file_info *);
 428 static void     release_files(struct iso9660 *);
 429 static unsigned toi(const void *p, int n);
 430 static inline void re_add_entry(struct iso9660 *, struct file_info *);
 431 static inline struct file_info * re_get_entry(struct iso9660 *);
 432 static inline int rede_add_entry(struct file_info *);
 433 static inline struct file_info * rede_get_entry(struct file_info *);
 434 static inline void cache_add_entry(struct iso9660 *iso9660,
 435                     struct file_info *file);
 436 static inline struct file_info *cache_get_entry(struct iso9660 *iso9660);
 437 static int      heap_add_entry(struct archive_read *a, struct heap_queue *heap,
 438                     struct file_info *file, uint64_t key);
 439 static struct file_info *heap_get_entry(struct heap_queue *heap);
 440
 441 #define add_entry(arch, iso9660, file)  \
 442         heap_add_entry(arch, &((iso9660)->pending_files), file, file->offset)
 443 #define next_entry(iso9660)             \
 444         heap_get_entry(&((iso9660)->pending_files))
 445
 446 int
 447 archive_read_support_format_iso9660(struct archive *_a)
 448 {
 449         struct archive_read *a = (struct archive_read *)_a;
 450         struct iso9660 *iso9660;
 451         int r;
 452
 453         archive_check_magic(_a, ARCHIVE_READ_MAGIC,
 454             ARCHIVE_STATE_NEW, "archive_read_support_format_iso9660");
 455
 456         iso9660 = (struct iso9660 *)calloc(1, sizeof(*iso9660));
 457         if (iso9660 == NULL) {
 458                 archive_set_error(&a->archive, ENOMEM,
 459                     "Can't allocate iso9660 data");
 460                 return (ARCHIVE_FATAL);
 461         }
 462         iso9660->magic = ISO9660_MAGIC;
 463         iso9660->cache_files.first = NULL;
 464         iso9660->cache_files.last = &(iso9660->cache_files.first);
 465         iso9660->re_files.first = NULL;
 466         iso9660->re_files.last = &(iso9660->re_files.first);
 467         /* Enable to support Joliet extensions by default.      */
 468         iso9660->opt_support_joliet = 1;
 469         /* Enable to support Rock Ridge extensions by default.  */
 470         iso9660->opt_support_rockridge = 1;
 471
 472         r = __archive_read_register_format(a,
 473             iso9660,
 474             "iso9660",
 475             archive_read_format_iso9660_bid,
 476             archive_read_format_iso9660_options,
 477             archive_read_format_iso9660_read_header,
 478             archive_read_format_iso9660_read_data,
 479             archive_read_format_iso9660_read_data_skip,
 480             NULL,
 481             archive_read_format_iso9660_cleanup);
 482
 483         if (r != ARCHIVE_OK) {
 484                 free(iso9660);
 485                 return (r);
 486         }
 487         return (ARCHIVE_OK);
 488 }
 489
 490
 491 static int
 492 archive_read_format_iso9660_bid(struct archive_read *a, int best_bid)
 493 {
 494         struct iso9660 *iso9660;
 495         ssize_t bytes_read;
 496         const unsigned char *p;
 497         int seenTerminator;
 498
 499         /* If there's already a better bid than we can ever
 500            make, don't bother testing. */
 501         if (best_bid > 48)
 502                 return (-1);
 503
 504         iso9660 = (struct iso9660 *)(a->format->data);
 505
 506         /*
 507          * Skip the first 32k (reserved area) and get the first
 508          * 8 sectors of the volume descriptor table.  Of course,
 509          * if the I/O layer gives us more, we'll take it.
 510          */
 511 #define RESERVED_AREA   (SYSTEM_AREA_BLOCK * LOGICAL_BLOCK_SIZE)
 512         p = __archive_read_ahead(a,
 513             RESERVED_AREA + 8 * LOGICAL_BLOCK_SIZE,
 514             &bytes_read);
 515         if (p == NULL)
 516             return (-1);
 517
 518         /* Skip the reserved area. */
 519         bytes_read -= RESERVED_AREA;
 520         p += RESERVED_AREA;
 521
 522         /* Check each volume descriptor. */
 523         seenTerminator = 0;
 524         for (; bytes_read > LOGICAL_BLOCK_SIZE;
 525             bytes_read -= LOGICAL_BLOCK_SIZE, p += LOGICAL_BLOCK_SIZE) {
 526                 /* Do not handle undefined Volume Descriptor Type. */
 527                 if (p[0] >= 4 && p[0] <= 254)
 528                         return (0);
 529                 /* Standard Identifier must be "CD001" */
 530                 if (memcmp(p + 1, "CD001", 5) != 0)
 531                         return (0);
 532                 if (isPVD(iso9660, p))
 533                         continue;
 534                 if (!iso9660->joliet.location) {
 535                         if (isJolietSVD(iso9660, p))
 536                                 continue;
 537                 }
 538                 if (isBootRecord(iso9660, p))
 539                         continue;
 540                 if (isEVD(iso9660, p))
 541                         continue;
 542                 if (isSVD(iso9660, p))
 543                         continue;
 544                 if (isVolumePartition(iso9660, p))
 545                         continue;
 546                 if (isVDSetTerminator(iso9660, p)) {
 547                         seenTerminator = 1;
 548                         break;
 549                 }
 550                 return (0);
 551         }
 552         /*
 553          * ISO 9660 format must have Primary Volume Descriptor and
 554          * Volume Descriptor Set Terminator.
 555          */
 556         if (seenTerminator && iso9660->primary.location > 16)
 557                 return (48);
 558
 559         /* We didn't find a valid PVD; return a bid of zero. */
 560         return (0);
 561 }
 562
 563 static int
 564 archive_read_format_iso9660_options(struct archive_read *a,
 565                 const char *key, const char *val)
 566 {
 567         struct iso9660 *iso9660;
 568
 569         iso9660 = (struct iso9660 *)(a->format->data);
 570
 571         if (strcmp(key, "joliet") == 0) {
 572                 if (val == NULL || strcmp(val, "off") == 0 ||
 573                                 strcmp(val, "ignore") == 0 ||
 574                                 strcmp(val, "disable") == 0 ||
 575                                 strcmp(val, "0") == 0)
 576                         iso9660->opt_support_joliet = 0;
 577                 else
 578                         iso9660->opt_support_joliet = 1;
 579                 return (ARCHIVE_OK);
 580         }
 581         if (strcmp(key, "rockridge") == 0 ||
 582             strcmp(key, "Rockridge") == 0) {
 583                 iso9660->opt_support_rockridge = val != NULL;
 584                 return (ARCHIVE_OK);
 585         }
 586
 587         /* Note: The "warn" return is just to inform the options
 588          * supervisor that we didn't handle it.  It will generate
 589          * a suitable error if no one used this option. */
 590         return (ARCHIVE_WARN);
 591 }
 592
 593 static int
 594 isNull(struct iso9660 *iso9660, const unsigned char *h, unsigned offset,
 595 unsigned bytes)
 596 {
 597
 598         while (bytes >= sizeof(iso9660->null)) {
 599                 if (!memcmp(iso9660->null, h + offset, sizeof(iso9660->null)))
 600                         return (0);
 601                 offset += sizeof(iso9660->null);
 602                 bytes -= sizeof(iso9660->null);
 603         }
 604         if (bytes)
 605                 return memcmp(iso9660->null, h + offset, bytes) == 0;
 606         else
 607                 return (1);
 608 }
 609
 610 static int
 611 isBootRecord(struct iso9660 *iso9660, const unsigned char *h)
 612 {
 613         (void)iso9660; /* UNUSED */
 614
 615         /* Type of the Volume Descriptor Boot Record must be 0. */
 616         if (h[0] != 0)
 617                 return (0);
 618
 619         /* Volume Descriptor Version must be 1. */
 620         if (h[6] != 1)
 621                 return (0);
 622
 623         return (1);
 624 }
 625
 626 static int
 627 isVolumePartition(struct iso9660 *iso9660, const unsigned char *h)
 628 {
 629         int32_t location;
 630
 631         /* Type of the Volume Partition Descriptor must be 3. */
 632         if (h[0] != 3)
 633                 return (0);
 634
 635         /* Volume Descriptor Version must be 1. */
 636         if (h[6] != 1)
 637                 return (0);
 638         /* Unused Field */
 639         if (h[7] != 0)
 640                 return (0);
 641
 642         location = archive_le32dec(h + 72);
 643         if (location <= SYSTEM_AREA_BLOCK ||
 644             location >= iso9660->volume_block)
 645                 return (0);
 646         if ((uint32_t)location != archive_be32dec(h + 76))
 647                 return (0);
 648
 649         return (1);
 650 }
 651
 652 static int
 653 isVDSetTerminator(struct iso9660 *iso9660, const unsigned char *h)
 654 {
 655         (void)iso9660; /* UNUSED */
 656
 657         /* Type of the Volume Descriptor Set Terminator must be 255. */
 658         if (h[0] != 255)
 659                 return (0);
 660
 661         /* Volume Descriptor Version must be 1. */
 662         if (h[6] != 1)
 663                 return (0);
 664
 665         /* Reserved field must be 0. */
 666         if (!isNull(iso9660, h, 7, 2048-7))
 667                 return (0);
 668
 669         return (1);
 670 }
 671
 672 static int
 673 isJolietSVD(struct iso9660 *iso9660, const unsigned char *h)
 674 {
 675         const unsigned char *p;
 676         ssize_t logical_block_size;
 677         int32_t volume_block;
 678
 679         /* Check if current sector is a kind of Supplementary Volume
 680          * Descriptor. */
 681         if (!isSVD(iso9660, h))
 682                 return (0);
 683
 684         /* FIXME: do more validations according to joliet spec. */
 685
 686         /* check if this SVD contains joliet extension! */
 687         p = h + SVD_escape_sequences_offset;
 688         /* N.B. Joliet spec says p[1] == '\\', but.... */
 689         if (p[0] == '%' && p[1] == '/') {
 690                 int level = 0;
 691
 692                 if (p[2] == '@')
 693                         level = 1;
 694                 else if (p[2] == 'C')
 695                         level = 2;
 696                 else if (p[2] == 'E')
 697                         level = 3;
 698                 else /* not joliet */
 699                         return (0);
 700
 701                 iso9660->seenJoliet = level;
 702
 703         } else /* not joliet */
 704                 return (0);
 705
 706         logical_block_size =
 707             archive_le16dec(h + SVD_logical_block_size_offset);
 708         volume_block = archive_le32dec(h + SVD_volume_space_size_offset);
 709
 710         iso9660->logical_block_size = logical_block_size;
 711         iso9660->volume_block = volume_block;
 712         iso9660->volume_size = logical_block_size * (uint64_t)volume_block;
 713         /* Read Root Directory Record in Volume Descriptor. */
 714         p = h + SVD_root_directory_record_offset;
 715         iso9660->joliet.location = archive_le32dec(p + DR_extent_offset);
 716         iso9660->joliet.size = archive_le32dec(p + DR_size_offset);
 717
 718         return (48);
 719 }
 720
 721 static int
 722 isSVD(struct iso9660 *iso9660, const unsigned char *h)
 723 {
 724         const unsigned char *p;
 725         ssize_t logical_block_size;
 726         int32_t volume_block;
 727         int32_t location;
 728
 729         (void)iso9660; /* UNUSED */
 730
 731         /* Type 2 means it's a SVD. */
 732         if (h[SVD_type_offset] != 2)
 733                 return (0);
 734
 735         /* Reserved field must be 0. */
 736         if (!isNull(iso9660, h, SVD_reserved1_offset, SVD_reserved1_size))
 737                 return (0);
 738         if (!isNull(iso9660, h, SVD_reserved2_offset, SVD_reserved2_size))
 739                 return (0);
 740         if (!isNull(iso9660, h, SVD_reserved3_offset, SVD_reserved3_size))
 741                 return (0);
 742
 743         /* File structure version must be 1 for ISO9660/ECMA119. */
 744         if (h[SVD_file_structure_version_offset] != 1)
 745                 return (0);
 746
 747         logical_block_size =
 748             archive_le16dec(h + SVD_logical_block_size_offset);
 749         if (logical_block_size <= 0)
 750                 return (0);
 751
 752         volume_block = archive_le32dec(h + SVD_volume_space_size_offset);
 753         if (volume_block <= SYSTEM_AREA_BLOCK+4)
 754                 return (0);
 755
 756         /* Location of Occurrence of Type L Path Table must be
 757          * available location,
 758          * >= SYSTEM_AREA_BLOCK(16) + 2 and < Volume Space Size. */
 759         location = archive_le32dec(h+SVD_type_L_path_table_offset);
 760         if (location < SYSTEM_AREA_BLOCK+2 || location >= volume_block)
 761                 return (0);
 762
 763         /* The Type M Path Table must be at a valid location (WinISO
 764          * and probably other programs omit this, so we allow zero)
 765          *
 766          * >= SYSTEM_AREA_BLOCK(16) + 2 and < Volume Space Size. */
 767         location = archive_be32dec(h+SVD_type_M_path_table_offset);
 768         if ((location > 0 && location < SYSTEM_AREA_BLOCK+2)
 769             || location >= volume_block)
 770                 return (0);
 771
 772         /* Read Root Directory Record in Volume Descriptor. */
 773         p = h + SVD_root_directory_record_offset;
 774         if (p[DR_length_offset] != 34)
 775                 return (0);
 776
 777         return (48);
 778 }
 779
 780 static int
 781 isEVD(struct iso9660 *iso9660, const unsigned char *h)
 782 {
 783         const unsigned char *p;
 784         ssize_t logical_block_size;
 785         int32_t volume_block;
 786         int32_t location;
 787
 788         (void)iso9660; /* UNUSED */
 789
 790         /* Type of the Enhanced Volume Descriptor must be 2. */
 791         if (h[PVD_type_offset] != 2)
 792                 return (0);
 793
 794         /* EVD version must be 2. */
 795         if (h[PVD_version_offset] != 2)
 796                 return (0);
 797
 798         /* Reserved field must be 0. */
 799         if (h[PVD_reserved1_offset] != 0)
 800                 return (0);
 801
 802         /* Reserved field must be 0. */
 803         if (!isNull(iso9660, h, PVD_reserved2_offset, PVD_reserved2_size))
 804                 return (0);
 805
 806         /* Reserved field must be 0. */
 807         if (!isNull(iso9660, h, PVD_reserved3_offset, PVD_reserved3_size))
 808                 return (0);
 809
 810         /* Logical block size must be > 0. */
 811         /* I've looked at Ecma 119 and can't find any stronger
 812          * restriction on this field. */
 813         logical_block_size =
 814             archive_le16dec(h + PVD_logical_block_size_offset);
 815         if (logical_block_size <= 0)
 816                 return (0);
 817
 818         volume_block =
 819             archive_le32dec(h + PVD_volume_space_size_offset);
 820         if (volume_block <= SYSTEM_AREA_BLOCK+4)
 821                 return (0);
 822
 823         /* File structure version must be 2 for ISO9660:1999. */
 824         if (h[PVD_file_structure_version_offset] != 2)
 825                 return (0);
 826
 827         /* Location of Occurrence of Type L Path Table must be
 828          * available location,
 829          * >= SYSTEM_AREA_BLOCK(16) + 2 and < Volume Space Size. */
 830         location = archive_le32dec(h+PVD_type_1_path_table_offset);
 831         if (location < SYSTEM_AREA_BLOCK+2 || location >= volume_block)
 832                 return (0);
 833
 834         /* Location of Occurrence of Type M Path Table must be
 835          * available location,
 836          * >= SYSTEM_AREA_BLOCK(16) + 2 and < Volume Space Size. */
 837         location = archive_be32dec(h+PVD_type_m_path_table_offset);
 838         if ((location > 0 && location < SYSTEM_AREA_BLOCK+2)
 839             || location >= volume_block)
 840                 return (0);
 841
 842         /* Reserved field must be 0. */
 843         if (!isNull(iso9660, h, PVD_reserved4_offset, PVD_reserved4_size))
 844                 return (0);
 845
 846         /* Reserved field must be 0. */
 847         if (!isNull(iso9660, h, PVD_reserved5_offset, PVD_reserved5_size))
 848                 return (0);
 849
 850         /* Read Root Directory Record in Volume Descriptor. */
 851         p = h + PVD_root_directory_record_offset;
 852         if (p[DR_length_offset] != 34)
 853                 return (0);
 854
 855         return (48);
 856 }
 857
 858 static int
 859 isPVD(struct iso9660 *iso9660, const unsigned char *h)
 860 {
 861         const unsigned char *p;
 862         ssize_t logical_block_size;
 863         int32_t volume_block;
 864         int32_t location;
 865         int i;
 866
 867         /* Type of the Primary Volume Descriptor must be 1. */
 868         if (h[PVD_type_offset] != 1)
 869                 return (0);
 870
 871         /* PVD version must be 1. */
 872         if (h[PVD_version_offset] != 1)
 873                 return (0);
 874
 875         /* Reserved field must be 0. */
 876         if (h[PVD_reserved1_offset] != 0)
 877                 return (0);
 878
 879         /* Reserved field must be 0. */
 880         if (!isNull(iso9660, h, PVD_reserved2_offset, PVD_reserved2_size))
 881                 return (0);
 882
 883         /* Reserved field must be 0. */
 884         if (!isNull(iso9660, h, PVD_reserved3_offset, PVD_reserved3_size))
 885                 return (0);
 886
 887         /* Logical block size must be > 0. */
 888         /* I've looked at Ecma 119 and can't find any stronger
 889          * restriction on this field. */
 890         logical_block_size =
 891             archive_le16dec(h + PVD_logical_block_size_offset);
 892         if (logical_block_size <= 0)
 893                 return (0);
 894
 895         volume_block = archive_le32dec(h + PVD_volume_space_size_offset);
 896         if (volume_block <= SYSTEM_AREA_BLOCK+4)
 897                 return (0);
 898
 899         /* File structure version must be 1 for ISO9660/ECMA119. */
 900         if (h[PVD_file_structure_version_offset] != 1)
 901                 return (0);
 902
 903         /* Location of Occurrence of Type L Path Table must be
 904          * available location,
 905          * > SYSTEM_AREA_BLOCK(16) + 2 and < Volume Space Size. */
 906         location = archive_le32dec(h+PVD_type_1_path_table_offset);
 907         if (location < SYSTEM_AREA_BLOCK+2 || location >= volume_block)
 908                 return (0);
 909
 910         /* The Type M Path Table must also be at a valid location
 911          * (although ECMA 119 requires a Type M Path Table, WinISO and
 912          * probably other programs omit it, so we permit a zero here)
 913          *
 914          * >= SYSTEM_AREA_BLOCK(16) + 2 and < Volume Space Size. */
 915         location = archive_be32dec(h+PVD_type_m_path_table_offset);
 916         if ((location > 0 && location < SYSTEM_AREA_BLOCK+2)
 917             || location >= volume_block)
 918                 return (0);
 919
 920         /* Reserved field must be 0. */
 921         /* But accept NetBSD/FreeBSD "makefs" images with 0x20 here. */
 922         for (i = 0; i < PVD_reserved4_size; ++i)
 923                 if (h[PVD_reserved4_offset + i] != 0
 924                     && h[PVD_reserved4_offset + i] != 0x20)
 925                         return (0);
 926
 927         /* Reserved field must be 0. */
 928         if (!isNull(iso9660, h, PVD_reserved5_offset, PVD_reserved5_size))
 929                 return (0);
 930
 931         /* XXX TODO: Check other values for sanity; reject more
 932          * malformed PVDs. XXX */
 933
 934         /* Read Root Directory Record in Volume Descriptor. */
 935         p = h + PVD_root_directory_record_offset;
 936         if (p[DR_length_offset] != 34)
 937                 return (0);
 938
 939         if (!iso9660->primary.location) {
 940                 iso9660->logical_block_size = logical_block_size;
 941                 iso9660->volume_block = volume_block;
 942                 iso9660->volume_size =
 943                     logical_block_size * (uint64_t)volume_block;
 944                 iso9660->primary.location =
 945                     archive_le32dec(p + DR_extent_offset);
 946                 iso9660->primary.size = archive_le32dec(p + DR_size_offset);
 947         }
 948
 949         return (48);
 950 }
 951
 952 static int
 953 read_children(struct archive_read *a, struct file_info *parent)
 954 {
 955         struct iso9660 *iso9660;
 956         const unsigned char *b, *p;
 957         struct file_info *multi;
 958         size_t step, skip_size;
 959
 960         iso9660 = (struct iso9660 *)(a->format->data);
 961         /* flush any remaining bytes from the last round to ensure
 962          * we're positioned */
 963         if (iso9660->entry_bytes_unconsumed) {
 964                 __archive_read_consume(a, iso9660->entry_bytes_unconsumed);
 965                 iso9660->entry_bytes_unconsumed = 0;
 966         }
 967         if (iso9660->current_position > parent->offset) {
 968                 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
 969                     "Ignoring out-of-order directory (%s) %jd > %jd",
 970                     parent->name.s,
 971                     (intmax_t)iso9660->current_position,
 972                     (intmax_t)parent->offset);
 973                 return (ARCHIVE_WARN);
 974         }
 975         if (parent->offset + parent->size > iso9660->volume_size) {
 976                 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
 977                     "Directory is beyond end-of-media: %s",
 978                     parent->name.s);
 979                 return (ARCHIVE_WARN);
 980         }
 981         if (iso9660->current_position < parent->offset) {
 982                 int64_t skipsize;
 983
 984                 skipsize = parent->offset - iso9660->current_position;
 985                 skipsize = __archive_read_consume(a, skipsize);
 986                 if (skipsize < 0)
 987                         return ((int)skipsize);
 988                 iso9660->current_position = parent->offset;
 989         }
 990
 991         step = (size_t)(((parent->size + iso9660->logical_block_size -1) /
 992             iso9660->logical_block_size) * iso9660->logical_block_size);
 993         b = __archive_read_ahead(a, step, NULL);
 994         if (b == NULL) {
 995                 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
 996                     "Failed to read full block when scanning "
 997                     "ISO9660 directory list");
 998                 return (ARCHIVE_FATAL);
 999         }
1000         iso9660->current_position += step;
1001         multi = NULL;
1002         skip_size = step;
1003         while (step) {
1004                 p = b;
1005                 b += iso9660->logical_block_size;
1006                 step -= iso9660->logical_block_size;
1007                 for (; *p != 0 && p < b && p + *p <= b; p += *p) {
1008                         struct file_info *child;
1009
1010                         /* N.B.: these special directory identifiers
1011                          * are 8 bit "values" even on a
1012                          * Joliet CD with UCS-2 (16bit) encoding.
1013                          */
1014
1015                         /* Skip '.' entry. */
1016                         if (*(p + DR_name_len_offset) == 1
1017                             && *(p + DR_name_offset) == '\0')
1018                                 continue;
1019                         /* Skip '..' entry. */
1020                         if (*(p + DR_name_len_offset) == 1
1021                             && *(p + DR_name_offset) == '\001')
1022                                 continue;
1023                         child = parse_file_info(a, parent, p);
1024                         if (child == NULL) {
1025                                 __archive_read_consume(a, skip_size);
1026                                 return (ARCHIVE_FATAL);
1027                         }
1028                         if (child->cl_offset == 0 &&
1029                             (child->multi_extent || multi != NULL)) {
1030                                 struct content *con;
1031
1032                                 if (multi == NULL) {
1033                                         multi = child;
1034                                         multi->contents.first = NULL;
1035                                         multi->contents.last =
1036                                             &(multi->contents.first);
1037                                 }
1038                                 con = malloc(sizeof(struct content));
1039                                 if (con == NULL) {
1040                                         archive_set_error(
1041                                             &a->archive, ENOMEM,
1042                                             "No memory for multi extent");
1043                                         __archive_read_consume(a, skip_size);
1044                                         return (ARCHIVE_FATAL);
1045                                 }
1046                                 con->offset = child->offset;
1047                                 con->size = child->size;
1048                                 con->next = NULL;
1049                                 *multi->contents.last = con;
1050                                 multi->contents.last = &(con->next);
1051                                 if (multi == child) {
1052                                         if (add_entry(a, iso9660, child)
1053                                             != ARCHIVE_OK)
1054                                                 return (ARCHIVE_FATAL);
1055                                 } else {
1056                                         multi->size += child->size;
1057                                         if (!child->multi_extent)
1058                                                 multi = NULL;
1059                                 }
1060                         } else
1061                                 if (add_entry(a, iso9660, child) != ARCHIVE_OK)
1062                                         return (ARCHIVE_FATAL);
1063                 }
1064         }
1065
1066         __archive_read_consume(a, skip_size);
1067
1068         /* Read data which recorded by RRIP "CE" extension. */
1069         if (read_CE(a, iso9660) != ARCHIVE_OK)
1070                 return (ARCHIVE_FATAL);
1071
1072         return (ARCHIVE_OK);
1073 }
1074
1075 static int
1076 choose_volume(struct archive_read *a, struct iso9660 *iso9660)
1077 {
1078         struct file_info *file;
1079         int64_t skipsize;
1080         struct vd *vd;
1081         const void *block;
1082         char seenJoliet;
1083
1084         vd = &(iso9660->primary);
1085         if (!iso9660->opt_support_joliet)
1086                 iso9660->seenJoliet = 0;
1087         if (iso9660->seenJoliet &&
1088                 vd->location > iso9660->joliet.location)
1089                 /* This condition is unlikely; by way of caution. */
1090                 vd = &(iso9660->joliet);
1091
1092         skipsize = LOGICAL_BLOCK_SIZE * vd->location;
1093         skipsize = __archive_read_consume(a, skipsize);
1094         if (skipsize < 0)
1095                 return ((int)skipsize);
1096         iso9660->current_position = skipsize;
1097
1098         block = __archive_read_ahead(a, vd->size, NULL);
1099         if (block == NULL) {
1100                 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1101                     "Failed to read full block when scanning "
1102                     "ISO9660 directory list");
1103                 return (ARCHIVE_FATAL);
1104         }
1105
1106         /*
1107          * While reading Root Directory, flag seenJoliet must be zero to
1108          * avoid converting special name 0x00(Current Directory) and
1109          * next byte to UCS2.
1110          */
1111         seenJoliet = iso9660->seenJoliet;/* Save flag. */
1112         iso9660->seenJoliet = 0;
1113         file = parse_file_info(a, NULL, block);
1114         if (file == NULL)
1115                 return (ARCHIVE_FATAL);
1116         iso9660->seenJoliet = seenJoliet;
1117
1118         /*
1119          * If the iso image has both RockRidge and Joliet, we preferentially
1120          * use RockRidge Extensions rather than Joliet ones.
1121          */
1122         if (vd == &(iso9660->primary) && iso9660->seenRockridge
1123             && iso9660->seenJoliet)
1124                 iso9660->seenJoliet = 0;
1125
1126         if (vd == &(iso9660->primary) && !iso9660->seenRockridge
1127             && iso9660->seenJoliet) {
1128                 /* Switch reading data from primary to joliet. */
1129                 vd = &(iso9660->joliet);
1130                 skipsize = LOGICAL_BLOCK_SIZE * vd->location;
1131                 skipsize -= iso9660->current_position;
1132                 skipsize = __archive_read_consume(a, skipsize);
1133                 if (skipsize < 0)
1134                         return ((int)skipsize);
1135                 iso9660->current_position += skipsize;
1136
1137                 block = __archive_read_ahead(a, vd->size, NULL);
1138                 if (block == NULL) {
1139                         archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1140                             "Failed to read full block when scanning "
1141                             "ISO9660 directory list");
1142                         return (ARCHIVE_FATAL);
1143                 }
1144                 iso9660->seenJoliet = 0;
1145                 file = parse_file_info(a, NULL, block);
1146                 if (file == NULL)
1147                         return (ARCHIVE_FATAL);
1148                 iso9660->seenJoliet = seenJoliet;
1149         }
1150
1151         /* Store the root directory in the pending list. */
1152         if (add_entry(a, iso9660, file) != ARCHIVE_OK)
1153                 return (ARCHIVE_FATAL);
1154         if (iso9660->seenRockridge) {
1155                 a->archive.archive_format = ARCHIVE_FORMAT_ISO9660_ROCKRIDGE;
1156                 a->archive.archive_format_name =
1157                     "ISO9660 with Rockridge extensions";
1158         }
1159
1160         return (ARCHIVE_OK);
1161 }
1162
1163 static int
1164 archive_read_format_iso9660_read_header(struct archive_read *a,
1165     struct archive_entry *entry)
1166 {
1167         struct iso9660 *iso9660;
1168         struct file_info *file;
1169         int r, rd_r = ARCHIVE_OK;
1170
1171         iso9660 = (struct iso9660 *)(a->format->data);
1172
1173         if (!a->archive.archive_format) {
1174                 a->archive.archive_format = ARCHIVE_FORMAT_ISO9660;
1175                 a->archive.archive_format_name = "ISO9660";
1176         }
1177
1178         if (iso9660->current_position == 0) {
1179                 r = choose_volume(a, iso9660);
1180                 if (r != ARCHIVE_OK)
1181                         return (r);
1182         }
1183
1184         file = NULL;/* Eliminate a warning. */
1185         /* Get the next entry that appears after the current offset. */
1186         r = next_entry_seek(a, iso9660, &file);
1187         if (r != ARCHIVE_OK)
1188                 return (r);
1189
1190         if (iso9660->seenJoliet) {
1191                 /*
1192                  * Convert UTF-16BE of a filename to local locale MBS
1193                  * and store the result into a filename field.
1194                  */
1195                 if (iso9660->sconv_utf16be == NULL) {
1196                         iso9660->sconv_utf16be =
1197                             archive_string_conversion_from_charset(
1198                                 &(a->archive), "UTF-16BE", 1);
1199                         if (iso9660->sconv_utf16be == NULL)
1200                                 /* Coundn't allocate memory */
1201                                 return (ARCHIVE_FATAL);
1202                 }
1203                 if (iso9660->utf16be_path == NULL) {
1204                         iso9660->utf16be_path = malloc(UTF16_NAME_MAX);
1205                         if (iso9660->utf16be_path == NULL) {
1206                                 archive_set_error(&a->archive, ENOMEM,
1207                                     "No memory");
1208                                 return (ARCHIVE_FATAL);
1209                         }
1210                 }
1211                 if (iso9660->utf16be_previous_path == NULL) {
1212                         iso9660->utf16be_previous_path = malloc(UTF16_NAME_MAX);
1213                         if (iso9660->utf16be_previous_path == NULL) {
1214                                 archive_set_error(&a->archive, ENOMEM,
1215                                     "No memory");
1216                                 return (ARCHIVE_FATAL);
1217                         }
1218                 }
1219
1220                 iso9660->utf16be_path_len = 0;
1221                 if (build_pathname_utf16be(iso9660->utf16be_path,
1222                     UTF16_NAME_MAX, &(iso9660->utf16be_path_len), file) != 0) {
1223                         archive_set_error(&a->archive,
1224                             ARCHIVE_ERRNO_FILE_FORMAT,
1225                             "Pathname is too long");
1226                 }
1227
1228                 r = archive_entry_copy_pathname_l(entry,
1229                     (const char *)iso9660->utf16be_path,
1230                     iso9660->utf16be_path_len,
1231                     iso9660->sconv_utf16be);
1232                 if (r != 0) {
1233                         if (errno == ENOMEM) {
1234                                 archive_set_error(&a->archive, ENOMEM,
1235                                     "No memory for Pathname");
1236                                 return (ARCHIVE_FATAL);
1237                         }
1238                         archive_set_error(&a->archive,
1239                             ARCHIVE_ERRNO_FILE_FORMAT,
1240                             "Pathname cannot be converted "
1241                             "from %s to current locale.",
1242                             archive_string_conversion_charset_name(
1243                               iso9660->sconv_utf16be));
1244
1245                         rd_r = ARCHIVE_WARN;
1246                 }
1247         } else {
1248                 archive_string_empty(&iso9660->pathname);
1249                 archive_entry_set_pathname(entry,
1250                     build_pathname(&iso9660->pathname, file));
1251         }
1252
1253         iso9660->entry_bytes_remaining = file->size;
1254         /* Offset for sparse-file-aware clients. */
1255         iso9660->entry_sparse_offset = 0;
1256
1257         if (file->offset + file->size > iso9660->volume_size) {
1258                 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1259                     "File is beyond end-of-media: %s",
1260                     archive_entry_pathname(entry));
1261                 iso9660->entry_bytes_remaining = 0;
1262                 return (ARCHIVE_WARN);
1263         }
1264
1265         /* Set up the entry structure with information about this entry. */
1266         archive_entry_set_mode(entry, file->mode);
1267         archive_entry_set_uid(entry, file->uid);
1268         archive_entry_set_gid(entry, file->gid);
1269         archive_entry_set_nlink(entry, file->nlinks);
1270         if (file->birthtime_is_set)
1271                 archive_entry_set_birthtime(entry, file->birthtime, 0);
1272         else
1273                 archive_entry_unset_birthtime(entry);
1274         archive_entry_set_mtime(entry, file->mtime, 0);
1275         archive_entry_set_ctime(entry, file->ctime, 0);
1276         archive_entry_set_atime(entry, file->atime, 0);
1277         /* N.B.: Rock Ridge supports 64-bit device numbers. */
1278         archive_entry_set_rdev(entry, (dev_t)file->rdev);
1279         archive_entry_set_size(entry, iso9660->entry_bytes_remaining);
1280         if (file->symlink.s != NULL)
1281                 archive_entry_copy_symlink(entry, file->symlink.s);
1282
1283         /* Note: If the input isn't seekable, we can't rewind to
1284          * return the same body again, so if the next entry refers to
1285          * the same data, we have to return it as a hardlink to the
1286          * original entry. */
1287         if (file->number != -1 &&
1288             file->number == iso9660->previous_number) {
1289                 if (iso9660->seenJoliet) {
1290                         r = archive_entry_copy_hardlink_l(entry,
1291                             (const char *)iso9660->utf16be_previous_path,
1292                             iso9660->utf16be_previous_path_len,
1293                             iso9660->sconv_utf16be);
1294                         if (r != 0) {
1295                                 if (errno == ENOMEM) {
1296                                         archive_set_error(&a->archive, ENOMEM,
1297                                             "No memory for Linkname");
1298                                         return (ARCHIVE_FATAL);
1299                                 }
1300                                 archive_set_error(&a->archive,
1301                                     ARCHIVE_ERRNO_FILE_FORMAT,
1302                                     "Linkname cannot be converted "
1303                                     "from %s to current locale.",
1304                                     archive_string_conversion_charset_name(
1305                                       iso9660->sconv_utf16be));
1306                                 rd_r = ARCHIVE_WARN;
1307                         }
1308                 } else
1309                         archive_entry_set_hardlink(entry,
1310                             iso9660->previous_pathname.s);
1311                 archive_entry_unset_size(entry);
1312                 iso9660->entry_bytes_remaining = 0;
1313                 return (rd_r);
1314         }
1315
1316         if ((file->mode & AE_IFMT) != AE_IFDIR &&
1317             file->offset < iso9660->current_position) {
1318                 int64_t r64;
1319
1320                 r64 = __archive_read_seek(a, file->offset, SEEK_SET);
1321                 if (r64 != (int64_t)file->offset) {
1322                         /* We can't seek backwards to extract it, so issue
1323                          * a warning.  Note that this can only happen if
1324                          * this entry was added to the heap after we passed
1325                          * this offset, that is, only if the directory
1326                          * mentioning this entry is later than the body of
1327                          * the entry. Such layouts are very unusual; most
1328                          * ISO9660 writers lay out and record all directory
1329                          * information first, then store all file bodies. */
1330                         archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1331                             "Ignoring out-of-order file @%jx (%s) %jd < %jd",
1332                             (intmax_t)file->number,
1333                             iso9660->pathname.s,
1334                             (intmax_t)file->offset,
1335                             (intmax_t)iso9660->current_position);
1336                         iso9660->entry_bytes_remaining = 0;
1337                         return (ARCHIVE_WARN);
1338                 }
1339                 iso9660->current_position = (uint64_t)r64;
1340         }
1341
1342         /* Initialize zisofs variables. */
1343         iso9660->entry_zisofs.pz = file->pz;
1344         if (file->pz) {
1345 #ifdef HAVE_ZLIB_H
1346                 struct zisofs  *zisofs;
1347
1348                 zisofs = &iso9660->entry_zisofs;
1349                 zisofs->initialized = 0;
1350                 zisofs->pz_log2_bs = file->pz_log2_bs;
1351                 zisofs->pz_uncompressed_size = file->pz_uncompressed_size;
1352                 zisofs->pz_offset = 0;
1353                 zisofs->header_avail = 0;
1354                 zisofs->header_passed = 0;
1355                 zisofs->block_pointers_avail = 0;
1356 #endif
1357                 archive_entry_set_size(entry, file->pz_uncompressed_size);
1358         }
1359
1360         iso9660->previous_number = file->number;
1361         if (iso9660->seenJoliet) {
1362                 memcpy(iso9660->utf16be_previous_path, iso9660->utf16be_path,
1363                     iso9660->utf16be_path_len);
1364                 iso9660->utf16be_previous_path_len = iso9660->utf16be_path_len;
1365         } else
1366                 archive_strcpy(
1367                     &iso9660->previous_pathname, iso9660->pathname.s);
1368
1369         /* Reset entry_bytes_remaining if the file is multi extent. */
1370         iso9660->entry_content = file->contents.first;
1371         if (iso9660->entry_content != NULL)
1372                 iso9660->entry_bytes_remaining = iso9660->entry_content->size;
1373
1374         if (archive_entry_filetype(entry) == AE_IFDIR) {
1375                 /* Overwrite nlinks by proper link number which is
1376                  * calculated from number of sub directories. */
1377                 archive_entry_set_nlink(entry, 2 + file->subdirs);
1378                 /* Directory data has been read completely. */
1379                 iso9660->entry_bytes_remaining = 0;
1380         }
1381
1382         if (rd_r != ARCHIVE_OK)
1383                 return (rd_r);
1384         return (ARCHIVE_OK);
1385 }
1386
1387 static int
1388 archive_read_format_iso9660_read_data_skip(struct archive_read *a)
1389 {
1390         /* Because read_next_header always does an explicit skip
1391          * to the next entry, we don't need to do anything here. */
1392         (void)a; /* UNUSED */
1393         return (ARCHIVE_OK);
1394 }
1395
1396 #ifdef HAVE_ZLIB_H
1397
1398 static int
1399 zisofs_read_data(struct archive_read *a,
1400     const void **buff, size_t *size, int64_t *offset)
1401 {
1402         struct iso9660 *iso9660;
1403         struct zisofs  *zisofs;
1404         const unsigned char *p;
1405         size_t avail;
1406         ssize_t bytes_read;
1407         size_t uncompressed_size;
1408         int r;
1409
1410         iso9660 = (struct iso9660 *)(a->format->data);
1411         zisofs = &iso9660->entry_zisofs;
1412
1413         p = __archive_read_ahead(a, 1, &bytes_read);
1414         if (bytes_read <= 0) {
1415                 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
1416                     "Truncated zisofs file body");
1417                 return (ARCHIVE_FATAL);
1418         }
1419         if (bytes_read > iso9660->entry_bytes_remaining)
1420                 bytes_read = (ssize_t)iso9660->entry_bytes_remaining;
1421         avail = bytes_read;
1422         uncompressed_size = 0;
1423
1424         if (!zisofs->initialized) {
1425                 size_t ceil, xsize;
1426
1427                 /* Allocate block pointers buffer. */
1428                 ceil = (size_t)((zisofs->pz_uncompressed_size +
1429                         (((int64_t)1) << zisofs->pz_log2_bs) - 1)
1430                         >> zisofs->pz_log2_bs);
1431                 xsize = (ceil + 1) * 4;
1432                 if (zisofs->block_pointers_alloc < xsize) {
1433                         size_t alloc;
1434
1435                         if (zisofs->block_pointers != NULL)
1436                                 free(zisofs->block_pointers);
1437                         alloc = ((xsize >> 10) + 1) << 10;
1438                         zisofs->block_pointers = malloc(alloc);
1439                         if (zisofs->block_pointers == NULL) {
1440                                 archive_set_error(&a->archive, ENOMEM,
1441                                     "No memory for zisofs decompression");
1442                                 return (ARCHIVE_FATAL);
1443                         }
1444                         zisofs->block_pointers_alloc = alloc;
1445                 }
1446                 zisofs->block_pointers_size = xsize;
1447
1448                 /* Allocate uncompressed data buffer. */
1449                 xsize = (size_t)1UL << zisofs->pz_log2_bs;
1450                 if (zisofs->uncompressed_buffer_size < xsize) {
1451                         if (zisofs->uncompressed_buffer != NULL)
1452                                 free(zisofs->uncompressed_buffer);
1453                         zisofs->uncompressed_buffer = malloc(xsize);
1454                         if (zisofs->uncompressed_buffer == NULL) {
1455                                 archive_set_error(&a->archive, ENOMEM,
1456                                     "No memory for zisofs decompression");
1457                                 return (ARCHIVE_FATAL);
1458                         }
1459                 }
1460                 zisofs->uncompressed_buffer_size = xsize;
1461
1462                 /*
1463                  * Read the file header, and check the magic code of zisofs.
1464                  */
1465                 if (zisofs->header_avail < sizeof(zisofs->header)) {
1466                         xsize = sizeof(zisofs->header) - zisofs->header_avail;
1467                         if (avail < xsize)
1468                                 xsize = avail;
1469                         memcpy(zisofs->header + zisofs->header_avail, p, xsize);
1470                         zisofs->header_avail += xsize;
1471                         avail -= xsize;
1472                         p += xsize;
1473                 }
1474                 if (!zisofs->header_passed &&
1475                     zisofs->header_avail == sizeof(zisofs->header)) {
1476                         int err = 0;
1477
1478                         if (memcmp(zisofs->header, zisofs_magic,
1479                             sizeof(zisofs_magic)) != 0)
1480                                 err = 1;
1481                         if (archive_le32dec(zisofs->header + 8)
1482                             != zisofs->pz_uncompressed_size)
1483                                 err = 1;
1484                         if (zisofs->header[12] != 4)
1485                                 err = 1;
1486                         if (zisofs->header[13] != zisofs->pz_log2_bs)
1487                                 err = 1;
1488                         if (err) {
1489                                 archive_set_error(&a->archive,
1490                                     ARCHIVE_ERRNO_FILE_FORMAT,
1491                                     "Illegal zisofs file body");
1492                                 return (ARCHIVE_FATAL);
1493                         }
1494                         zisofs->header_passed = 1;
1495                 }
1496                 /*
1497                  * Read block pointers.
1498                  */
1499                 if (zisofs->header_passed &&
1500                     zisofs->block_pointers_avail < zisofs->block_pointers_size) {
1501                         xsize = zisofs->block_pointers_size
1502                             - zisofs->block_pointers_avail;
1503                         if (avail < xsize)
1504                                 xsize = avail;
1505                         memcpy(zisofs->block_pointers
1506                             + zisofs->block_pointers_avail, p, xsize);
1507                         zisofs->block_pointers_avail += xsize;
1508                         avail -= xsize;
1509                         p += xsize;
1510                         if (zisofs->block_pointers_avail
1511                             == zisofs->block_pointers_size) {
1512                                 /* We've got all block pointers and initialize
1513                                  * related variables.   */
1514                                 zisofs->block_off = 0;
1515                                 zisofs->block_avail = 0;
1516                                 /* Complete a initialization */
1517                                 zisofs->initialized = 1;
1518                         }
1519                 }
1520
1521                 if (!zisofs->initialized)
1522                         goto next_data; /* We need more data. */
1523         }
1524
1525         /*
1526          * Get block offsets from block pointers.
1527          */
1528         if (zisofs->block_avail == 0) {
1529                 uint32_t bst, bed;
1530
1531                 if (zisofs->block_off + 4 >= zisofs->block_pointers_size) {
1532                         /* There isn't a pair of offsets. */
1533                         archive_set_error(&a->archive,
1534                             ARCHIVE_ERRNO_FILE_FORMAT,
1535                             "Illegal zisofs block pointers");
1536                         return (ARCHIVE_FATAL);
1537                 }
1538                 bst = archive_le32dec(
1539                     zisofs->block_pointers + zisofs->block_off);
1540                 if (bst != zisofs->pz_offset + (bytes_read - avail)) {
1541                         /* TODO: Should we seek offset of current file
1542                          * by bst ? */
1543                         archive_set_error(&a->archive,
1544                             ARCHIVE_ERRNO_FILE_FORMAT,
1545                             "Illegal zisofs block pointers(cannot seek)");
1546                         return (ARCHIVE_FATAL);
1547                 }
1548                 bed = archive_le32dec(
1549                     zisofs->block_pointers + zisofs->block_off + 4);
1550                 if (bed < bst) {
1551                         archive_set_error(&a->archive,
1552                             ARCHIVE_ERRNO_FILE_FORMAT,
1553                             "Illegal zisofs block pointers");
1554                         return (ARCHIVE_FATAL);
1555                 }
1556                 zisofs->block_avail = bed - bst;
1557                 zisofs->block_off += 4;
1558
1559                 /* Initialize compression library for new block. */
1560                 if (zisofs->stream_valid)
1561                         r = inflateReset(&zisofs->stream);
1562                 else
1563                         r = inflateInit(&zisofs->stream);
1564                 if (r != Z_OK) {
1565                         archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1566                             "Can't initialize zisofs decompression.");
1567                         return (ARCHIVE_FATAL);
1568                 }
1569                 zisofs->stream_valid = 1;
1570                 zisofs->stream.total_in = 0;
1571                 zisofs->stream.total_out = 0;
1572         }
1573
1574         /*
1575          * Make uncompressed data.
1576          */
1577         if (zisofs->block_avail == 0) {
1578                 memset(zisofs->uncompressed_buffer, 0,
1579                     zisofs->uncompressed_buffer_size);
1580                 uncompressed_size = zisofs->uncompressed_buffer_size;
1581         } else {
1582                 zisofs->stream.next_in = (Bytef *)(uintptr_t)(const void *)p;
1583                 if (avail > zisofs->block_avail)
1584                         zisofs->stream.avail_in = zisofs->block_avail;
1585                 else
1586                         zisofs->stream.avail_in = (uInt)avail;
1587                 zisofs->stream.next_out = zisofs->uncompressed_buffer;
1588                 zisofs->stream.avail_out =
1589                     (uInt)zisofs->uncompressed_buffer_size;
1590
1591                 r = inflate(&zisofs->stream, 0);
1592                 switch (r) {
1593                 case Z_OK: /* Decompressor made some progress.*/
1594                 case Z_STREAM_END: /* Found end of stream. */
1595                         break;
1596                 default:
1597                         archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1598                             "zisofs decompression failed (%d)", r);
1599                         return (ARCHIVE_FATAL);
1600                 }
1601                 uncompressed_size =
1602                     zisofs->uncompressed_buffer_size - zisofs->stream.avail_out;
1603                 avail -= zisofs->stream.next_in - p;
1604                 zisofs->block_avail -= (uint32_t)(zisofs->stream.next_in - p);
1605         }
1606 next_data:
1607         bytes_read -= avail;
1608         *buff = zisofs->uncompressed_buffer;
1609         *size = uncompressed_size;
1610         *offset = iso9660->entry_sparse_offset;
1611         iso9660->entry_sparse_offset += uncompressed_size;
1612         iso9660->entry_bytes_remaining -= bytes_read;
1613         iso9660->current_position += bytes_read;
1614         zisofs->pz_offset += (uint32_t)bytes_read;
1615         iso9660->entry_bytes_unconsumed += bytes_read;
1616
1617         return (ARCHIVE_OK);
1618 }
1619
1620 #else /* HAVE_ZLIB_H */
1621
1622 static int
1623 zisofs_read_data(struct archive_read *a,
1624     const void **buff, size_t *size, int64_t *offset)
1625 {
1626
1627         (void)buff;/* UNUSED */
1628         (void)size;/* UNUSED */
1629         (void)offset;/* UNUSED */
1630         archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
1631             "zisofs is not supported on this platform.");
1632         return (ARCHIVE_FAILED);
1633 }
1634
1635 #endif /* HAVE_ZLIB_H */
1636
1637 static int
1638 archive_read_format_iso9660_read_data(struct archive_read *a,
1639     const void **buff, size_t *size, int64_t *offset)
1640 {
1641         ssize_t bytes_read;
1642         struct iso9660 *iso9660;
1643
1644         iso9660 = (struct iso9660 *)(a->format->data);
1645
1646         if (iso9660->entry_bytes_unconsumed) {
1647                 __archive_read_consume(a, iso9660->entry_bytes_unconsumed);
1648                 iso9660->entry_bytes_unconsumed = 0;
1649         }
1650
1651         if (iso9660->entry_bytes_remaining <= 0) {
1652                 if (iso9660->entry_content != NULL)
1653                         iso9660->entry_content = iso9660->entry_content->next;
1654                 if (iso9660->entry_content == NULL) {
1655                         *buff = NULL;
1656                         *size = 0;
1657                         *offset = iso9660->entry_sparse_offset;
1658                         return (ARCHIVE_EOF);
1659                 }
1660                 /* Seek forward to the start of the entry. */
1661                 if (iso9660->current_position < iso9660->entry_content->offset) {
1662                         int64_t step;
1663
1664                         step = iso9660->entry_content->offset -
1665                             iso9660->current_position;
1666                         step = __archive_read_consume(a, step);
1667                         if (step < 0)
1668                                 return ((int)step);
1669                         iso9660->current_position =
1670                             iso9660->entry_content->offset;
1671                 }
1672                 if (iso9660->entry_content->offset < iso9660->current_position) {
1673                         archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1674                             "Ignoring out-of-order file (%s) %jd < %jd",
1675                             iso9660->pathname.s,
1676                             (intmax_t)iso9660->entry_content->offset,
1677                             (intmax_t)iso9660->current_position);
1678                         *buff = NULL;
1679                         *size = 0;
1680                         *offset = iso9660->entry_sparse_offset;
1681                         return (ARCHIVE_WARN);
1682                 }
1683                 iso9660->entry_bytes_remaining = iso9660->entry_content->size;
1684         }
1685         if (iso9660->entry_zisofs.pz)
1686                 return (zisofs_read_data(a, buff, size, offset));
1687
1688         *buff = __archive_read_ahead(a, 1, &bytes_read);
1689         if (bytes_read == 0)
1690                 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1691                     "Truncated input file");
1692         if (*buff == NULL)
1693                 return (ARCHIVE_FATAL);
1694         if (bytes_read > iso9660->entry_bytes_remaining)
1695                 bytes_read = (ssize_t)iso9660->entry_bytes_remaining;
1696         *size = bytes_read;
1697         *offset = iso9660->entry_sparse_offset;
1698         iso9660->entry_sparse_offset += bytes_read;
1699         iso9660->entry_bytes_remaining -= bytes_read;
1700         iso9660->entry_bytes_unconsumed = bytes_read;
1701         iso9660->current_position += bytes_read;
1702         return (ARCHIVE_OK);
1703 }
1704
1705 static int
1706 archive_read_format_iso9660_cleanup(struct archive_read *a)
1707 {
1708         struct iso9660 *iso9660;
1709         int r = ARCHIVE_OK;
1710
1711         iso9660 = (struct iso9660 *)(a->format->data);
1712         release_files(iso9660);
1713         free(iso9660->read_ce_req.reqs);
1714         archive_string_free(&iso9660->pathname);
1715         archive_string_free(&iso9660->previous_pathname);
1716         if (iso9660->pending_files.files)
1717                 free(iso9660->pending_files.files);
1718 #ifdef HAVE_ZLIB_H
1719         free(iso9660->entry_zisofs.uncompressed_buffer);
1720         free(iso9660->entry_zisofs.block_pointers);
1721         if (iso9660->entry_zisofs.stream_valid) {
1722                 if (inflateEnd(&iso9660->entry_zisofs.stream) != Z_OK) {
1723                         archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1724                             "Failed to clean up zlib decompressor");
1725                         r = ARCHIVE_FATAL;
1726                 }
1727         }
1728 #endif
1729         free(iso9660->utf16be_path);
1730         free(iso9660->utf16be_previous_path);
1731         free(iso9660);
1732         (a->format->data) = NULL;
1733         return (r);
1734 }
1735
1736 /*
1737  * This routine parses a single ISO directory record, makes sense
1738  * of any extensions, and stores the result in memory.
1739  */
1740 static struct file_info *
1741 parse_file_info(struct archive_read *a, struct file_info *parent,
1742     const unsigned char *isodirrec)
1743 {
1744         struct iso9660 *iso9660;
1745         struct file_info *file;
1746         size_t name_len;
1747         const unsigned char *rr_start, *rr_end;
1748         const unsigned char *p;
1749         size_t dr_len;
1750         uint64_t fsize;
1751         int32_t location;
1752         int flags;
1753
1754         iso9660 = (struct iso9660 *)(a->format->data);
1755
1756         dr_len = (size_t)isodirrec[DR_length_offset];
1757         name_len = (size_t)isodirrec[DR_name_len_offset];
1758         location = archive_le32dec(isodirrec + DR_extent_offset);
1759         fsize = toi(isodirrec + DR_size_offset, DR_size_size);
1760         /* Sanity check that dr_len needs at least 34. */
1761         if (dr_len < 34) {
1762                 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1763                     "Invalid length of directory record");
1764                 return (NULL);
1765         }
1766         /* Sanity check that name_len doesn't exceed dr_len. */
1767         if (dr_len - 33 < name_len || name_len == 0) {
1768                 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1769                     "Invalid length of file identifier");
1770                 return (NULL);
1771         }
1772         /* Sanity check that location doesn't exceed volume block.
1773          * Don't check lower limit of location; it's possibility
1774          * the location has negative value when file type is symbolic
1775          * link or file size is zero. As far as I know latest mkisofs
1776          * do that.
1777          */
1778         if (location > 0 &&
1779             (location + ((fsize + iso9660->logical_block_size -1)
1780                / iso9660->logical_block_size))
1781                         > (uint32_t)iso9660->volume_block) {
1782                 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1783                     "Invalid location of extent of file");
1784                 return (NULL);
1785         }
1786         /* Sanity check that location doesn't have a negative value
1787          * when the file is not empty. it's too large. */
1788         if (fsize != 0 && location < 0) {
1789                 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1790                     "Invalid location of extent of file");
1791                 return (NULL);
1792         }
1793
1794         /* Create a new file entry and copy data from the ISO dir record. */
1795         file = (struct file_info *)calloc(1, sizeof(*file));
1796         if (file == NULL) {
1797                 archive_set_error(&a->archive, ENOMEM,
1798                     "No memory for file entry");
1799                 return (NULL);
1800         }
1801         file->parent = parent;
1802         file->offset = iso9660->logical_block_size * (uint64_t)location;
1803         file->size = fsize;
1804         file->mtime = isodate7(isodirrec + DR_date_offset);
1805         file->ctime = file->atime = file->mtime;
1806         file->rede_files.first = NULL;
1807         file->rede_files.last = &(file->rede_files.first);
1808
1809         p = isodirrec + DR_name_offset;
1810         /* Rockridge extensions (if any) follow name.  Compute this
1811          * before fidgeting the name_len below. */
1812         rr_start = p + name_len + (name_len & 1 ? 0 : 1);
1813         rr_end = isodirrec + dr_len;
1814
1815         if (iso9660->seenJoliet) {
1816                 /* Joliet names are max 64 chars (128 bytes) according to spec,
1817                  * but genisoimage/mkisofs allows recording longer Joliet
1818                  * names which are 103 UCS2 characters(206 bytes) by their
1819                  * option '-joliet-long'.
1820                  */
1821                 if (name_len > 206)
1822                         name_len = 206;
1823                 name_len &= ~1;
1824
1825                 /* trim trailing first version and dot from filename.
1826                  *
1827                  * Remember we were in UTF-16BE land!
1828                  * SEPARATOR 1 (.) and SEPARATOR 2 (;) are both
1829                  * 16 bits big endian characters on Joliet.
1830                  *
1831                  * TODO: sanitize filename?
1832                  *       Joliet allows any UCS-2 char except:
1833                  *       *, /, :, ;, ? and \.
1834                  */
1835                 /* Chop off trailing ';1' from files. */
1836                 if (name_len > 4 && p[name_len-4] == 0 && p[name_len-3] == ';'
1837                     && p[name_len-2] == 0 && p[name_len-1] == '1')
1838                         name_len -= 4;
1839 #if 0 /* XXX: this somehow manages to strip of single-character file extensions, like '.c'. */
1840                 /* Chop off trailing '.' from filenames. */
1841                 if (name_len > 2 && p[name_len-2] == 0 && p[name_len-1] == '.')
1842                         name_len -= 2;
1843 #endif
1844                 if ((file->utf16be_name = malloc(name_len)) == NULL) {
1845                         archive_set_error(&a->archive, ENOMEM,
1846                             "No memory for file name");
1847                         return (NULL);
1848                 }
1849                 memcpy(file->utf16be_name, p, name_len);
1850                 file->utf16be_bytes = name_len;
1851         } else {
1852                 /* Chop off trailing ';1' from files. */
1853                 if (name_len > 2 && p[name_len - 2] == ';' &&
1854                                 p[name_len - 1] == '1')
1855                         name_len -= 2;
1856                 /* Chop off trailing '.' from filenames. */
1857                 if (name_len > 1 && p[name_len - 1] == '.')
1858                         --name_len;
1859
1860                 archive_strncpy(&file->name, (const char *)p, name_len);
1861         }
1862
1863         flags = isodirrec[DR_flags_offset];
1864         if (flags & 0x02)
1865                 file->mode = AE_IFDIR | 0700;
1866         else
1867                 file->mode = AE_IFREG | 0400;
1868         if (flags & 0x80)
1869                 file->multi_extent = 1;
1870         else
1871                 file->multi_extent = 0;
1872         /*
1873          * Use a location for the file number, which is treated as an inode
1874          * number to find out hardlink target. If Rockridge extensions is
1875          * being used, the file number will be overwritten by FILE SERIAL
1876          * NUMBER of RRIP "PX" extension.
1877          * Note: Old mkisofs did not record that FILE SERIAL NUMBER
1878          * in ISO images.
1879          * Note2: xorriso set 0 to the location of a symlink file.
1880          */
1881         if (file->size == 0 && location >= 0) {
1882                 /* If file->size is zero, its location points wrong place,
1883                  * and so we should not use it for the file number.
1884                  * When the location has negative value, it can be used
1885                  * for the file number.
1886                  */
1887                 file->number = -1;
1888                 /* Do not appear before any directory entries. */
1889                 file->offset = -1;
1890         } else
1891                 file->number = (int64_t)(uint32_t)location;
1892
1893         /* Rockridge extensions overwrite information from above. */
1894         if (iso9660->opt_support_rockridge) {
1895                 if (parent == NULL && rr_end - rr_start >= 7) {
1896                         p = rr_start;
1897                         if (memcmp(p, "SP\x07\x01\xbe\xef", 6) == 0) {
1898                                 /*
1899                                  * SP extension stores the suspOffset
1900                                  * (Number of bytes to skip between
1901                                  * filename and SUSP records.)
1902                                  * It is mandatory by the SUSP standard
1903                                  * (IEEE 1281).
1904                                  *
1905                                  * It allows SUSP to coexist with
1906                                  * non-SUSP uses of the System
1907                                  * Use Area by placing non-SUSP data
1908                                  * before SUSP data.
1909                                  *
1910                                  * SP extension must be in the root
1911                                  * directory entry, disable all SUSP
1912                                  * processing if not found.
1913                                  */
1914                                 iso9660->suspOffset = p[6];
1915                                 iso9660->seenSUSP = 1;
1916                                 rr_start += 7;
1917                         }
1918                 }
1919                 if (iso9660->seenSUSP) {
1920                         int r;
1921
1922                         file->name_continues = 0;
1923                         file->symlink_continues = 0;
1924                         rr_start += iso9660->suspOffset;
1925                         r = parse_rockridge(a, file, rr_start, rr_end);
1926                         if (r != ARCHIVE_OK) {
1927                                 free(file);
1928                                 return (NULL);
1929                         }
1930                         /*
1931                          * A file size of symbolic link files in ISO images
1932                          * made by makefs is not zero and its location is
1933                          * the same as those of next regular file. That is
1934                          * the same as hard like file and it causes unexpected
1935                          * error.
1936                          */
1937                         if (file->size > 0 &&
1938                             (file->mode & AE_IFMT) == AE_IFLNK) {
1939                                 file->size = 0;
1940                                 file->number = -1;
1941                                 file->offset = -1;
1942                         }
1943                 } else
1944                         /* If there isn't SUSP, disable parsing
1945                          * rock ridge extensions. */
1946                         iso9660->opt_support_rockridge = 0;
1947         }
1948
1949         file->nlinks = 1;/* Reset nlink. we'll calculate it later. */
1950         /* Tell file's parent how many children that parent has. */
1951         if (parent != NULL && (flags & 0x02))
1952                 parent->subdirs++;
1953
1954         if (iso9660->seenRockridge) {
1955                 if (parent != NULL && parent->parent == NULL &&
1956                     (flags & 0x02) && iso9660->rr_moved == NULL &&
1957                     file->name.s &&
1958                     (strcmp(file->name.s, "rr_moved") == 0 ||
1959                      strcmp(file->name.s, ".rr_moved") == 0)) {
1960                         iso9660->rr_moved = file;
1961                         file->rr_moved = 1;
1962                         file->rr_moved_has_re_only = 1;
1963                         file->re = 0;
1964                         parent->subdirs--;
1965                 } else if (file->re) {
1966                         /*
1967                          * Sanity check: file's parent is rr_moved.
1968                          */
1969                         if (parent == NULL || parent->rr_moved == 0) {
1970                                 archive_set_error(&a->archive,
1971                                     ARCHIVE_ERRNO_MISC,
1972                                     "Invalid Rockridge RE");
1973                                 return (NULL);
1974                         }
1975                         /*
1976                          * Sanity check: file does not have "CL" extension.
1977                          */
1978                         if (file->cl_offset) {
1979                                 archive_set_error(&a->archive,
1980                                     ARCHIVE_ERRNO_MISC,
1981                                     "Invalid Rockridge RE and CL");
1982                                 return (NULL);
1983                         }
1984                         /*
1985                          * Sanity check: The file type must be a directory.
1986                          */
1987                         if ((flags & 0x02) == 0) {
1988                                 archive_set_error(&a->archive,
1989                                     ARCHIVE_ERRNO_MISC,
1990                                     "Invalid Rockridge RE");
1991                                 return (NULL);
1992                         }
1993                 } else if (parent != NULL && parent->rr_moved)
1994                         file->rr_moved_has_re_only = 0;
1995                 else if (parent != NULL && (flags & 0x02) &&
1996                     (parent->re || parent->re_descendant))
1997                         file->re_descendant = 1;
1998                 if (file->cl_offset) {
1999                         struct file_info *r;
2000
2001                         if (parent == NULL || parent->parent == NULL) {
2002                                 archive_set_error(&a->archive,
2003                                     ARCHIVE_ERRNO_MISC,
2004                                     "Invalid Rockridge CL");
2005                                 return (NULL);
2006                         }
2007                         /*
2008                          * Sanity check: The file type must be a regular file.
2009                          */
2010                         if ((flags & 0x02) != 0) {
2011                                 archive_set_error(&a->archive,
2012                                     ARCHIVE_ERRNO_MISC,
2013                                     "Invalid Rockridge CL");
2014                                 return (NULL);
2015                         }
2016                         parent->subdirs++;
2017                         /* Overwrite an offset and a number of this "CL" entry
2018                          * to appear before other dirs. "+1" to those is to
2019                          * make sure to appear after "RE" entry which this
2020                          * "CL" entry should be connected with. */
2021                         file->offset = file->number = file->cl_offset + 1;
2022
2023                         /*
2024                          * Sanity check: cl_offset does not point at its
2025                          * the parents or itself.
2026                          */
2027                         for (r = parent; r; r = r->parent) {
2028                                 if (r->offset == file->cl_offset) {
2029                                         archive_set_error(&a->archive,
2030                                             ARCHIVE_ERRNO_MISC,
2031                                             "Invalid Rockridge CL");
2032                                         return (NULL);
2033                                 }
2034                         }
2035                         if (file->cl_offset == file->offset ||
2036                             parent->rr_moved) {
2037                                 archive_set_error(&a->archive,
2038                                     ARCHIVE_ERRNO_MISC,
2039                                     "Invalid Rockridge CL");
2040                                 return (NULL);
2041                         }
2042                 }
2043         }
2044
2045 #if DEBUG
2046         /* DEBUGGING: Warn about attributes I don't yet fully support. */
2047         if ((flags & ~0x02) != 0) {
2048                 fprintf(stderr, "\n ** Unrecognized flag: ");
2049                 dump_isodirrec(stderr, isodirrec);
2050                 fprintf(stderr, "\n");
2051         } else if (toi(isodirrec + DR_volume_sequence_number_offset, 2) != 1) {
2052                 fprintf(stderr, "\n ** Unrecognized sequence number: ");
2053                 dump_isodirrec(stderr, isodirrec);
2054                 fprintf(stderr, "\n");
2055         } else if (*(isodirrec + DR_file_unit_size_offset) != 0) {
2056                 fprintf(stderr, "\n ** Unexpected file unit size: ");
2057                 dump_isodirrec(stderr, isodirrec);
2058                 fprintf(stderr, "\n");
2059         } else if (*(isodirrec + DR_interleave_offset) != 0) {
2060                 fprintf(stderr, "\n ** Unexpected interleave: ");
2061                 dump_isodirrec(stderr, isodirrec);
2062                 fprintf(stderr, "\n");
2063         } else if (*(isodirrec + DR_ext_attr_length_offset) != 0) {
2064                 fprintf(stderr, "\n ** Unexpected extended attribute length: ");
2065                 dump_isodirrec(stderr, isodirrec);
2066                 fprintf(stderr, "\n");
2067         }
2068 #endif
2069         register_file(iso9660, file);
2070         return (file);
2071 }
2072
2073 static int
2074 parse_rockridge(struct archive_read *a, struct file_info *file,
2075     const unsigned char *p, const unsigned char *end)
2076 {
2077         struct iso9660 *iso9660;
2078
2079         iso9660 = (struct iso9660 *)(a->format->data);
2080
2081         while (p + 4 <= end  /* Enough space for another entry. */
2082             && p[0] >= 'A' && p[0] <= 'Z' /* Sanity-check 1st char of name. */
2083             && p[1] >= 'A' && p[1] <= 'Z' /* Sanity-check 2nd char of name. */
2084             && p[2] >= 4 /* Sanity-check length. */
2085             && p + p[2] <= end) { /* Sanity-check length. */
2086                 const unsigned char *data = p + 4;
2087                 int data_length = p[2] - 4;
2088                 int version = p[3];
2089
2090                 switch(p[0]) {
2091                 case 'C':
2092                         if (p[1] == 'E') {
2093                                 if (version == 1 && data_length == 24) {
2094                                         /*
2095                                          * CE extension comprises:
2096                                          *   8 byte sector containing extension
2097                                          *   8 byte offset w/in above sector
2098                                          *   8 byte length of continuation
2099                                          */
2100                                         int32_t location =
2101                                             archive_le32dec(data);
2102                                         file->ce_offset =
2103                                             archive_le32dec(data+8);
2104                                         file->ce_size =
2105                                             archive_le32dec(data+16);
2106                                         if (register_CE(a, location, file)
2107                                             != ARCHIVE_OK)
2108                                                 return (ARCHIVE_FATAL);
2109                                 }
2110                         }
2111                         else if (p[1] == 'L') {
2112                                 if (version == 1 && data_length == 8) {
2113                                         file->cl_offset = (uint64_t)
2114                                             iso9660->logical_block_size *
2115                                             (uint64_t)archive_le32dec(data);
2116                                         iso9660->seenRockridge = 1;
2117                                 }
2118                         }
2119                         break;
2120                 case 'N':
2121                         if (p[1] == 'M') {
2122                                 if (version == 1) {
2123                                         parse_rockridge_NM1(file,
2124                                             data, data_length);
2125                                         iso9660->seenRockridge = 1;
2126                                 }
2127                         }
2128                         break;
2129                 case 'P':
2130                         /*
2131                          * PD extension is padding;
2132                          * contents are always ignored.
2133                          *
2134                          * PL extension won't appear;
2135                          * contents are always ignored.
2136                          */
2137                         if (p[1] == 'N') {
2138                                 if (version == 1 && data_length == 16) {
2139                                         file->rdev = toi(data,4);
2140                                         file->rdev <<= 32;
2141                                         file->rdev |= toi(data + 8, 4);
2142                                         iso9660->seenRockridge = 1;
2143                                 }
2144                         }
2145                         else if (p[1] == 'X') {
2146                                 /*
2147                                  * PX extension comprises:
2148                                  *   8 bytes for mode,
2149                                  *   8 bytes for nlinks,
2150                                  *   8 bytes for uid,
2151                                  *   8 bytes for gid,
2152                                  *   8 bytes for inode.
2153                                  */
2154                                 if (version == 1) {
2155                                         if (data_length >= 8)
2156                                                 file->mode
2157                                                     = toi(data, 4);
2158                                         if (data_length >= 16)
2159                                                 file->nlinks
2160                                                     = toi(data + 8, 4);
2161                                         if (data_length >= 24)
2162                                                 file->uid
2163                                                     = toi(data + 16, 4);
2164                                         if (data_length >= 32)
2165                                                 file->gid
2166                                                     = toi(data + 24, 4);
2167                                         if (data_length >= 40)
2168                                                 file->number
2169                                                     = toi(data + 32, 4);
2170                                         iso9660->seenRockridge = 1;
2171                                 }
2172                         }
2173                         break;
2174                 case 'R':
2175                         if (p[1] == 'E' && version == 1) {
2176                                 file->re = 1;
2177                                 iso9660->seenRockridge = 1;
2178                         }
2179                         else if (p[1] == 'R' && version == 1) {
2180                                 /*
2181                                  * RR extension comprises:
2182                                  *    one byte flag value
2183                                  * This extension is obsolete,
2184                                  * so contents are always ignored.
2185                                  */
2186                         }
2187                         break;
2188                 case 'S':
2189                         if (p[1] == 'L') {
2190                                 if (version == 1) {
2191                                         parse_rockridge_SL1(file,
2192                                             data, data_length);
2193                                         iso9660->seenRockridge = 1;
2194                                 }
2195                         }
2196                         else if (p[1] == 'T'
2197                             && data_length == 0 && version == 1) {
2198                                 /*
2199                                  * ST extension marks end of this
2200                                  * block of SUSP entries.
2201                                  *
2202                                  * It allows SUSP to coexist with
2203                                  * non-SUSP uses of the System
2204                                  * Use Area by placing non-SUSP data
2205                                  * after SUSP data.
2206                                  */
2207                                 iso9660->seenSUSP = 0;
2208                                 iso9660->seenRockridge = 0;
2209                                 return (ARCHIVE_OK);
2210                         }
2211                         break;
2212                 case 'T':
2213                         if (p[1] == 'F') {
2214                                 if (version == 1) {
2215                                         parse_rockridge_TF1(file,
2216                                             data, data_length);
2217                                         iso9660->seenRockridge = 1;
2218                                 }
2219                         }
2220                         break;
2221                 case 'Z':
2222                         if (p[1] == 'F') {
2223                                 if (version == 1)
2224                                         parse_rockridge_ZF1(file,
2225                                             data, data_length);
2226                         }
2227                         break;
2228                 default:
2229                         break;
2230                 }
2231
2232                 p += p[2];
2233         }
2234         return (ARCHIVE_OK);
2235 }
2236
2237 static int
2238 register_CE(struct archive_read *a, int32_t location,
2239     struct file_info *file)
2240 {
2241         struct iso9660 *iso9660;
2242         struct read_ce_queue *heap;
2243         struct read_ce_req *p;
2244         uint64_t offset, parent_offset;
2245         int hole, parent;
2246
2247         iso9660 = (struct iso9660 *)(a->format->data);
2248         offset = ((uint64_t)location) * (uint64_t)iso9660->logical_block_size;
2249         if (((file->mode & AE_IFMT) == AE_IFREG &&
2250             offset >= file->offset) ||
2251             offset < iso9660->current_position ||
2252             (((uint64_t)file->ce_offset) + file->ce_size)
2253               > (uint64_t)iso9660->logical_block_size ||
2254             offset + file->ce_offset + file->ce_size
2255                   > iso9660->volume_size) {
2256                 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
2257                     "Invalid parameter in SUSP \"CE\" extension");
2258                 return (ARCHIVE_FATAL);
2259         }
2260
2261         /* Expand our CE list as necessary. */
2262         heap = &(iso9660->read_ce_req);
2263         if (heap->cnt >= heap->allocated) {
2264                 int new_size;
2265
2266                 if (heap->allocated < 16)
2267                         new_size = 16;
2268                 else
2269                         new_size = heap->allocated * 2;
2270                 /* Overflow might keep us from growing the list. */
2271                 if (new_size <= heap->allocated) {
2272                         archive_set_error(&a->archive, ENOMEM, "Out of memory");
2273                         return (ARCHIVE_FATAL);
2274                 }
2275                 p = calloc(new_size, sizeof(p[0]));
2276                 if (p == NULL) {
2277                         archive_set_error(&a->archive, ENOMEM, "Out of memory");
2278                         return (ARCHIVE_FATAL);
2279                 }
2280                 if (heap->reqs != NULL) {
2281                         memcpy(p, heap->reqs, heap->cnt * sizeof(*p));
2282                         free(heap->reqs);
2283                 }
2284                 heap->reqs = p;
2285                 heap->allocated = new_size;
2286         }
2287
2288         /*
2289          * Start with hole at end, walk it up tree to find insertion point.
2290          */
2291         hole = heap->cnt++;
2292         while (hole > 0) {
2293                 parent = (hole - 1)/2;
2294                 parent_offset = heap->reqs[parent].offset;
2295                 if (offset >= parent_offset) {
2296                         heap->reqs[hole].offset = offset;
2297                         heap->reqs[hole].file = file;
2298                         return (ARCHIVE_OK);
2299                 }
2300                 /* Move parent into hole <==> move hole up tree. */
2301                 heap->reqs[hole] = heap->reqs[parent];
2302                 hole = parent;
2303         }
2304         heap->reqs[0].offset = offset;
2305         heap->reqs[0].file = file;
2306         return (ARCHIVE_OK);
2307 }
2308
2309 static void
2310 next_CE(struct read_ce_queue *heap)
2311 {
2312         uint64_t a_offset, b_offset, c_offset;
2313         int a, b, c;
2314         struct read_ce_req tmp;
2315
2316         if (heap->cnt < 1)
2317                 return;
2318
2319         /*
2320          * Move the last item in the heap to the root of the tree
2321          */
2322         heap->reqs[0] = heap->reqs[--(heap->cnt)];
2323
2324         /*
2325          * Rebalance the heap.
2326          */
2327         a = 0; /* Starting element and its offset */
2328         a_offset = heap->reqs[a].offset;
2329         for (;;) {
2330                 b = a + a + 1; /* First child */
2331                 if (b >= heap->cnt)
2332                         return;
2333                 b_offset = heap->reqs[b].offset;
2334                 c = b + 1; /* Use second child if it is smaller. */
2335                 if (c < heap->cnt) {
2336                         c_offset = heap->reqs[c].offset;
2337                         if (c_offset < b_offset) {
2338                                 b = c;
2339                                 b_offset = c_offset;
2340                         }
2341                 }
2342                 if (a_offset <= b_offset)
2343                         return;
2344                 tmp = heap->reqs[a];
2345                 heap->reqs[a] = heap->reqs[b];
2346                 heap->reqs[b] = tmp;
2347                 a = b;
2348         }
2349 }
2350
2351
2352 static int
2353 read_CE(struct archive_read *a, struct iso9660 *iso9660)
2354 {
2355         struct read_ce_queue *heap;
2356         const unsigned char *b, *p, *end;
2357         struct file_info *file;
2358         size_t step;
2359         int r;
2360
2361         /* Read data which RRIP "CE" extension points. */
2362         heap = &(iso9660->read_ce_req);
2363         step = iso9660->logical_block_size;
2364         while (heap->cnt &&
2365             heap->reqs[0].offset == iso9660->current_position) {
2366                 b = __archive_read_ahead(a, step, NULL);
2367                 if (b == NULL) {
2368                         archive_set_error(&a->archive,
2369                             ARCHIVE_ERRNO_MISC,
2370                             "Failed to read full block when scanning "
2371                             "ISO9660 directory list");
2372                         return (ARCHIVE_FATAL);
2373                 }
2374                 do {
2375                         file = heap->reqs[0].file;
2376                         if (file->ce_offset + file->ce_size > step) {
2377                                 archive_set_error(&a->archive,
2378                                     ARCHIVE_ERRNO_FILE_FORMAT,
2379                                     "Malformed CE information");
2380                                 return (ARCHIVE_FATAL);
2381                         }
2382                         p = b + file->ce_offset;
2383                         end = p + file->ce_size;
2384                         next_CE(heap);
2385                         r = parse_rockridge(a, file, p, end);
2386                         if (r != ARCHIVE_OK)
2387                                 return (ARCHIVE_FATAL);
2388                 } while (heap->cnt &&
2389                     heap->reqs[0].offset == iso9660->current_position);
2390                 /* NOTE: Do not move this consume's code to fron of
2391                  * do-while loop. Registration of nested CE extension
2392                  * might cause error because of current position. */
2393                 __archive_read_consume(a, step);
2394                 iso9660->current_position += step;
2395         }
2396         return (ARCHIVE_OK);
2397 }
2398
2399 static void
2400 parse_rockridge_NM1(struct file_info *file,
2401                     const unsigned char *data, int data_length)
2402 {
2403         if (!file->name_continues)
2404                 archive_string_empty(&file->name);
2405         file->name_continues = 0;
2406         if (data_length < 1)
2407                 return;
2408         /*
2409          * NM version 1 extension comprises:
2410          *   1 byte flag, value is one of:
2411          *     = 0: remainder is name
2412          *     = 1: remainder is name, next NM entry continues name
2413          *     = 2: "."
2414          *     = 4: ".."
2415          *     = 32: Implementation specific
2416          *     All other values are reserved.
2417          */
2418         switch(data[0]) {
2419         case 0:
2420                 if (data_length < 2)
2421                         return;
2422                 archive_strncat(&file->name,
2423                     (const char *)data + 1, data_length - 1);
2424                 break;
2425         case 1:
2426                 if (data_length < 2)
2427                         return;
2428                 archive_strncat(&file->name,
2429                     (const char *)data + 1, data_length - 1);
2430                 file->name_continues = 1;
2431                 break;
2432         case 2:
2433                 archive_strcat(&file->name, ".");
2434                 break;
2435         case 4:
2436                 archive_strcat(&file->name, "..");
2437                 break;
2438         default:
2439                 return;
2440         }
2441
2442 }
2443
2444 static void
2445 parse_rockridge_TF1(struct file_info *file, const unsigned char *data,
2446     int data_length)
2447 {
2448         char flag;
2449         /*
2450          * TF extension comprises:
2451          *   one byte flag
2452          *   create time (optional)
2453          *   modify time (optional)
2454          *   access time (optional)
2455          *   attribute time (optional)
2456          *  Time format and presence of fields
2457          *  is controlled by flag bits.
2458          */
2459         if (data_length < 1)
2460                 return;
2461         flag = data[0];
2462         ++data;
2463         --data_length;
2464         if (flag & 0x80) {
2465                 /* Use 17-byte time format. */
2466                 if ((flag & 1) && data_length >= 17) {
2467                         /* Create time. */
2468                         file->birthtime_is_set = 1;
2469                         file->birthtime = isodate17(data);
2470                         data += 17;
2471                         data_length -= 17;
2472                 }
2473                 if ((flag & 2) && data_length >= 17) {
2474                         /* Modify time. */
2475                         file->mtime = isodate17(data);
2476                         data += 17;
2477                         data_length -= 17;
2478                 }
2479                 if ((flag & 4) && data_length >= 17) {
2480                         /* Access time. */
2481                         file->atime = isodate17(data);
2482                         data += 17;
2483                         data_length -= 17;
2484                 }
2485                 if ((flag & 8) && data_length >= 17) {
2486                         /* Attribute change time. */
2487                         file->ctime = isodate17(data);
2488                 }
2489         } else {
2490                 /* Use 7-byte time format. */
2491                 if ((flag & 1) && data_length >= 7) {
2492                         /* Create time. */
2493                         file->birthtime_is_set = 1;
2494                         file->birthtime = isodate7(data);
2495                         data += 7;
2496                         data_length -= 7;
2497                 }
2498                 if ((flag & 2) && data_length >= 7) {
2499                         /* Modify time. */
2500                         file->mtime = isodate7(data);
2501                         data += 7;
2502                         data_length -= 7;
2503                 }
2504                 if ((flag & 4) && data_length >= 7) {
2505                         /* Access time. */
2506                         file->atime = isodate7(data);
2507                         data += 7;
2508                         data_length -= 7;
2509                 }
2510                 if ((flag & 8) && data_length >= 7) {
2511                         /* Attribute change time. */
2512                         file->ctime = isodate7(data);
2513                 }
2514         }
2515 }
2516
2517 static void
2518 parse_rockridge_SL1(struct file_info *file, const unsigned char *data,
2519     int data_length)
2520 {
2521         const char *separator = "";
2522
2523         if (!file->symlink_continues || file->symlink.length < 1)
2524                 archive_string_empty(&file->symlink);
2525         file->symlink_continues = 0;
2526
2527         /*
2528          * Defined flag values:
2529          *  0: This is the last SL record for this symbolic link
2530          *  1: this symbolic link field continues in next SL entry
2531          *  All other values are reserved.
2532          */
2533         if (data_length < 1)
2534                 return;
2535         switch(*data) {
2536         case 0:
2537                 break;
2538         case 1:
2539                 file->symlink_continues = 1;
2540                 break;
2541         default:
2542                 return;
2543         }
2544         ++data;  /* Skip flag byte. */
2545         --data_length;
2546
2547         /*
2548          * SL extension body stores "components".
2549          * Basically, this is a complicated way of storing
2550          * a POSIX path.  It also interferes with using
2551          * symlinks for storing non-path data. <sigh>
2552          *
2553          * Each component is 2 bytes (flag and length)
2554          * possibly followed by name data.
2555          */
2556         while (data_length >= 2) {
2557                 unsigned char flag = *data++;
2558                 unsigned char nlen = *data++;
2559                 data_length -= 2;
2560
2561                 archive_strcat(&file->symlink, separator);
2562                 separator = "/";
2563
2564                 switch(flag) {
2565                 case 0: /* Usual case, this is text. */
2566                         if (data_length < nlen)
2567                                 return;
2568                         archive_strncat(&file->symlink,
2569                             (const char *)data, nlen);
2570                         break;
2571                 case 0x01: /* Text continues in next component. */
2572                         if (data_length < nlen)
2573                                 return;
2574                         archive_strncat(&file->symlink,
2575                             (const char *)data, nlen);
2576                         separator = "";
2577                         break;
2578                 case 0x02: /* Current dir. */
2579                         archive_strcat(&file->symlink, ".");
2580                         break;
2581                 case 0x04: /* Parent dir. */
2582                         archive_strcat(&file->symlink, "..");
2583                         break;
2584                 case 0x08: /* Root of filesystem. */
2585                         archive_strcat(&file->symlink, "/");
2586                         separator = "";
2587                         break;
2588                 case 0x10: /* Undefined (historically "volume root" */
2589                         archive_string_empty(&file->symlink);
2590                         archive_strcat(&file->symlink, "ROOT");
2591                         break;
2592                 case 0x20: /* Undefined (historically "hostname") */
2593                         archive_strcat(&file->symlink, "hostname");
2594                         break;
2595                 default:
2596                         /* TODO: issue a warning ? */
2597                         return;
2598                 }
2599                 data += nlen;
2600                 data_length -= nlen;
2601         }
2602 }
2603
2604 static void
2605 parse_rockridge_ZF1(struct file_info *file, const unsigned char *data,
2606     int data_length)
2607 {
2608
2609         if (data[0] == 0x70 && data[1] == 0x7a && data_length == 12) {
2610                 /* paged zlib */
2611                 file->pz = 1;
2612                 file->pz_log2_bs = data[3];
2613                 file->pz_uncompressed_size = archive_le32dec(&data[4]);
2614         }
2615 }
2616
2617 static void
2618 register_file(struct iso9660 *iso9660, struct file_info *file)
2619 {
2620
2621         file->use_next = iso9660->use_files;
2622         iso9660->use_files = file;
2623 }
2624
2625 static void
2626 release_files(struct iso9660 *iso9660)
2627 {
2628         struct content *con, *connext;
2629         struct file_info *file;
2630
2631         file = iso9660->use_files;
2632         while (file != NULL) {
2633                 struct file_info *next = file->use_next;
2634
2635                 archive_string_free(&file->name);
2636                 archive_string_free(&file->symlink);
2637                 free(file->utf16be_name);
2638                 con = file->contents.first;
2639                 while (con != NULL) {
2640                         connext = con->next;
2641                         free(con);
2642                         con = connext;
2643                 }
2644                 free(file);
2645                 file = next;
2646         }
2647 }
2648
2649 static int
2650 next_entry_seek(struct archive_read *a, struct iso9660 *iso9660,
2651     struct file_info **pfile)
2652 {
2653         struct file_info *file;
2654         int r;
2655
2656         r = next_cache_entry(a, iso9660, pfile);
2657         if (r != ARCHIVE_OK)
2658                 return (r);
2659         file = *pfile;
2660
2661         /* Don't waste time seeking for zero-length bodies. */
2662         if (file->size == 0)
2663                 file->offset = iso9660->current_position;
2664
2665         /* flush any remaining bytes from the last round to ensure
2666          * we're positioned */
2667         if (iso9660->entry_bytes_unconsumed) {
2668                 __archive_read_consume(a, iso9660->entry_bytes_unconsumed);
2669                 iso9660->entry_bytes_unconsumed = 0;
2670         }
2671
2672         /* Seek forward to the start of the entry. */
2673         if (iso9660->current_position < file->offset) {
2674                 int64_t step;
2675
2676                 step = file->offset - iso9660->current_position;
2677                 step = __archive_read_consume(a, step);
2678                 if (step < 0)
2679                         return ((int)step);
2680                 iso9660->current_position = file->offset;
2681         }
2682
2683         /* We found body of file; handle it now. */
2684         return (ARCHIVE_OK);
2685 }
2686
2687 static int
2688 next_cache_entry(struct archive_read *a, struct iso9660 *iso9660,
2689     struct file_info **pfile)
2690 {
2691         struct file_info *file;
2692         struct {
2693                 struct file_info        *first;
2694                 struct file_info        **last;
2695         }       empty_files;
2696         int64_t number;
2697         int count;
2698
2699         file = cache_get_entry(iso9660);
2700         if (file != NULL) {
2701                 *pfile = file;
2702                 return (ARCHIVE_OK);
2703         }
2704
2705         for (;;) {
2706                 struct file_info *re, *d;
2707
2708                 *pfile = file = next_entry(iso9660);
2709                 if (file == NULL) {
2710                         /*
2711                          * If directory entries all which are descendant of
2712                          * rr_moved are stil remaning, expose their.
2713                          */
2714                         if (iso9660->re_files.first != NULL &&
2715                             iso9660->rr_moved != NULL &&
2716                             iso9660->rr_moved->rr_moved_has_re_only)
2717                                 /* Expose "rr_moved" entry. */
2718                                 cache_add_entry(iso9660, iso9660->rr_moved);
2719                         while ((re = re_get_entry(iso9660)) != NULL) {
2720                                 /* Expose its descendant dirs. */
2721                                 while ((d = rede_get_entry(re)) != NULL)
2722                                         cache_add_entry(iso9660, d);
2723                         }
2724                         if (iso9660->cache_files.first != NULL)
2725                                 return (next_cache_entry(a, iso9660, pfile));
2726                         return (ARCHIVE_EOF);
2727                 }
2728
2729                 if (file->cl_offset) {
2730                         struct file_info *first_re = NULL;
2731                         int nexted_re = 0;
2732
2733                         /*
2734                          * Find "RE" dir for the current file, which
2735                          * has "CL" flag.
2736                          */
2737                         while ((re = re_get_entry(iso9660))
2738                             != first_re) {
2739                                 if (first_re == NULL)
2740                                         first_re = re;
2741                                 if (re->offset == file->cl_offset) {
2742                                         re->parent->subdirs--;
2743                                         re->parent = file->parent;
2744                                         re->re = 0;
2745                                         if (re->parent->re_descendant) {
2746                                                 nexted_re = 1;
2747                                                 re->re_descendant = 1;
2748                                                 if (rede_add_entry(re) < 0)
2749                                                         goto fatal_rr;
2750                                                 /* Move a list of descendants
2751                                                  * to a new ancestor. */
2752                                                 while ((d = rede_get_entry(
2753                                                     re)) != NULL)
2754                                                         if (rede_add_entry(d)
2755                                                             < 0)
2756                                                                 goto fatal_rr;
2757                                                 break;
2758                                         }
2759                                         /* Replace the current file
2760                                          * with "RE" dir */
2761                                         *pfile = file = re;
2762                                         /* Expose its descendant */
2763                                         while ((d = rede_get_entry(
2764                                             file)) != NULL)
2765                                                 cache_add_entry(
2766                                                     iso9660, d);
2767                                         break;
2768                                 } else
2769                                         re_add_entry(iso9660, re);
2770                         }
2771                         if (nexted_re) {
2772                                 /*
2773                                  * Do not expose this at this time
2774                                  * because we have not gotten its full-path
2775                                  * name yet.
2776                                  */
2777                                 continue;
2778                         }
2779                 } else if ((file->mode & AE_IFMT) == AE_IFDIR) {
2780                         int r;
2781
2782                         /* Read file entries in this dir. */
2783                         r = read_children(a, file);
2784                         if (r != ARCHIVE_OK)
2785                                 return (r);
2786
2787                         /*
2788                          * Handle a special dir of Rockridge extensions,
2789                          * "rr_moved".
2790                          */
2791                         if (file->rr_moved) {
2792                                 /*
2793                                  * If this has only the subdirectories which
2794                                  * have "RE" flags, do not expose at this time.
2795                                  */
2796                                 if (file->rr_moved_has_re_only)
2797                                         continue;
2798                                 /* Otherwise expose "rr_moved" entry. */
2799                         } else if (file->re) {
2800                                 /*
2801                                  * Do not expose this at this time
2802                                  * because we have not gotten its full-path
2803                                  * name yet.
2804                                  */
2805                                 re_add_entry(iso9660, file);
2806                                 continue;
2807                         } else if (file->re_descendant) {
2808                                 /*
2809                                  * If the top level "RE" entry of this entry
2810                                  * is not exposed, we, accordingly, should not
2811                                  * expose this entry at this time because
2812                                  * we cannot make its proper full-path name.
2813                                  */
2814                                 if (rede_add_entry(file) == 0)
2815                                         continue;
2816                                 /* Otherwise we can expose this entry because
2817                                  * it seems its top level "RE" has already been
2818                                  * exposed. */
2819                         }
2820                 }
2821                 break;
2822         }
2823
2824         if ((file->mode & AE_IFMT) != AE_IFREG || file->number == -1)
2825                 return (ARCHIVE_OK);
2826
2827         count = 0;
2828         number = file->number;
2829         iso9660->cache_files.first = NULL;
2830         iso9660->cache_files.last = &(iso9660->cache_files.first);
2831         empty_files.first = NULL;
2832         empty_files.last = &empty_files.first;
2833         /* Collect files which has the same file serial number.
2834          * Peek pending_files so that file which number is different
2835          * is not put bak. */
2836         while (iso9660->pending_files.used > 0 &&
2837             (iso9660->pending_files.files[0]->number == -1 ||
2838              iso9660->pending_files.files[0]->number == number)) {
2839                 if (file->number == -1) {
2840                         /* This file has the same offset
2841                          * but it's wrong offset which empty files
2842                          * and symlink files have.
2843                          * NOTE: This wrong offse was recorded by
2844                          * old mkisofs utility. If ISO images is
2845                          * created by latest mkisofs, this does not
2846                          * happen.
2847                          */
2848                         file->next = NULL;
2849                         *empty_files.last = file;
2850                         empty_files.last = &(file->next);
2851                 } else {
2852                         count++;
2853                         cache_add_entry(iso9660, file);
2854                 }
2855                 file = next_entry(iso9660);
2856         }
2857
2858         if (count == 0) {
2859                 *pfile = file;
2860                 return ((file == NULL)?ARCHIVE_EOF:ARCHIVE_OK);
2861         }
2862         if (file->number == -1) {
2863                 file->next = NULL;
2864                 *empty_files.last = file;
2865                 empty_files.last = &(file->next);
2866         } else {
2867                 count++;
2868                 cache_add_entry(iso9660, file);
2869         }
2870
2871         if (count > 1) {
2872                 /* The count is the same as number of hardlink,
2873                  * so much so that each nlinks of files in cache_file
2874                  * is overwritten by value of the count.
2875                  */
2876                 for (file = iso9660->cache_files.first;
2877                     file != NULL; file = file->next)
2878                         file->nlinks = count;
2879         }
2880         /* If there are empty files, that files are added
2881          * to the tail of the cache_files. */
2882         if (empty_files.first != NULL) {
2883                 *iso9660->cache_files.last = empty_files.first;
2884                 iso9660->cache_files.last = empty_files.last;
2885         }
2886         *pfile = cache_get_entry(iso9660);
2887         return ((*pfile == NULL)?ARCHIVE_EOF:ARCHIVE_OK);
2888
2889 fatal_rr:
2890         archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
2891             "Failed to connect 'CL' pointer to 'RE' rr_moved pointer of "
2892             "Rockridge extensions: current position = %jd, CL offset = %jd",
2893             (intmax_t)iso9660->current_position, (intmax_t)file->cl_offset);
2894         return (ARCHIVE_FATAL);
2895 }
2896
2897 static inline void
2898 re_add_entry(struct iso9660 *iso9660, struct file_info *file)
2899 {
2900         file->re_next = NULL;
2901         *iso9660->re_files.last = file;
2902         iso9660->re_files.last = &(file->re_next);
2903 }
2904
2905 static inline struct file_info *
2906 re_get_entry(struct iso9660 *iso9660)
2907 {
2908         struct file_info *file;
2909
2910         if ((file = iso9660->re_files.first) != NULL) {
2911                 iso9660->re_files.first = file->re_next;
2912                 if (iso9660->re_files.first == NULL)
2913                         iso9660->re_files.last =
2914                             &(iso9660->re_files.first);
2915         }
2916         return (file);
2917 }
2918
2919 static inline int
2920 rede_add_entry(struct file_info *file)
2921 {
2922         struct file_info *re;
2923
2924         /*
2925          * Find "RE" entry.
2926          */
2927         re = file->parent;
2928         while (re != NULL && !re->re)
2929                 re = re->parent;
2930         if (re == NULL)
2931                 return (-1);
2932
2933         file->re_next = NULL;
2934         *re->rede_files.last = file;
2935         re->rede_files.last = &(file->re_next);
2936         return (0);
2937 }
2938
2939 static inline struct file_info *
2940 rede_get_entry(struct file_info *re)
2941 {
2942         struct file_info *file;
2943
2944         if ((file = re->rede_files.first) != NULL) {
2945                 re->rede_files.first = file->re_next;
2946                 if (re->rede_files.first == NULL)
2947                         re->rede_files.last =
2948                             &(re->rede_files.first);
2949         }
2950         return (file);
2951 }
2952
2953 static inline void
2954 cache_add_entry(struct iso9660 *iso9660, struct file_info *file)
2955 {
2956         file->next = NULL;
2957         *iso9660->cache_files.last = file;
2958         iso9660->cache_files.last = &(file->next);
2959 }
2960
2961 static inline struct file_info *
2962 cache_get_entry(struct iso9660 *iso9660)
2963 {
2964         struct file_info *file;
2965
2966         if ((file = iso9660->cache_files.first) != NULL) {
2967                 iso9660->cache_files.first = file->next;
2968                 if (iso9660->cache_files.first == NULL)
2969                         iso9660->cache_files.last =
2970                             &(iso9660->cache_files.first);
2971         }
2972         return (file);
2973 }
2974
2975 static int
2976 heap_add_entry(struct archive_read *a, struct heap_queue *heap,
2977     struct file_info *file, uint64_t key)
2978 {
2979         uint64_t file_key, parent_key;
2980         int hole, parent;
2981
2982         /* Expand our pending files list as necessary. */
2983         if (heap->used >= heap->allocated) {
2984                 struct file_info **new_pending_files;
2985                 int new_size = heap->allocated * 2;
2986
2987                 if (heap->allocated < 1024)
2988                         new_size = 1024;
2989                 /* Overflow might keep us from growing the list. */
2990                 if (new_size <= heap->allocated) {
2991                         archive_set_error(&a->archive,
2992                             ENOMEM, "Out of memory");
2993                         return (ARCHIVE_FATAL);
2994                 }
2995                 new_pending_files = (struct file_info **)
2996                     malloc(new_size * sizeof(new_pending_files[0]));
2997                 if (new_pending_files == NULL) {
2998                         archive_set_error(&a->archive,
2999                             ENOMEM, "Out of memory");
3000                         return (ARCHIVE_FATAL);
3001                 }
3002                 memcpy(new_pending_files, heap->files,
3003                     heap->allocated * sizeof(new_pending_files[0]));
3004                 if (heap->files != NULL)
3005                         free(heap->files);
3006                 heap->files = new_pending_files;
3007                 heap->allocated = new_size;
3008         }
3009
3010         file_key = file->key = key;
3011
3012         /*
3013          * Start with hole at end, walk it up tree to find insertion point.
3014          */
3015         hole = heap->used++;
3016         while (hole > 0) {
3017                 parent = (hole - 1)/2;
3018                 parent_key = heap->files[parent]->key;
3019                 if (file_key >= parent_key) {
3020                         heap->files[hole] = file;
3021                         return (ARCHIVE_OK);
3022                 }
3023                 /* Move parent into hole <==> move hole up tree. */
3024                 heap->files[hole] = heap->files[parent];
3025                 hole = parent;
3026         }
3027         heap->files[0] = file;
3028
3029         return (ARCHIVE_OK);
3030 }
3031
3032 static struct file_info *
3033 heap_get_entry(struct heap_queue *heap)
3034 {
3035         uint64_t a_key, b_key, c_key;
3036         int a, b, c;
3037         struct file_info *r, *tmp;
3038
3039         if (heap->used < 1)
3040                 return (NULL);
3041
3042         /*
3043          * The first file in the list is the earliest; we'll return this.
3044          */
3045         r = heap->files[0];
3046
3047         /*
3048          * Move the last item in the heap to the root of the tree
3049          */
3050         heap->files[0] = heap->files[--(heap->used)];
3051
3052         /*
3053          * Rebalance the heap.
3054          */
3055         a = 0; /* Starting element and its heap key */
3056         a_key = heap->files[a]->key;
3057         for (;;) {
3058                 b = a + a + 1; /* First child */
3059                 if (b >= heap->used)
3060                         return (r);
3061                 b_key = heap->files[b]->key;
3062                 c = b + 1; /* Use second child if it is smaller. */
3063                 if (c < heap->used) {
3064                         c_key = heap->files[c]->key;
3065                         if (c_key < b_key) {
3066                                 b = c;
3067                                 b_key = c_key;
3068                         }
3069                 }
3070                 if (a_key <= b_key)
3071                         return (r);
3072                 tmp = heap->files[a];
3073                 heap->files[a] = heap->files[b];
3074                 heap->files[b] = tmp;
3075                 a = b;
3076         }
3077 }
3078
3079 static unsigned int
3080 toi(const void *p, int n)
3081 {
3082         const unsigned char *v = (const unsigned char *)p;
3083         if (n > 1)
3084                 return v[0] + 256 * toi(v + 1, n - 1);
3085         if (n == 1)
3086                 return v[0];
3087         return (0);
3088 }
3089
3090 static time_t
3091 isodate7(const unsigned char *v)
3092 {
3093         struct tm tm;
3094         int offset;
3095         time_t t;
3096
3097         memset(&tm, 0, sizeof(tm));
3098         tm.tm_year = v[0];
3099         tm.tm_mon = v[1] - 1;
3100         tm.tm_mday = v[2];
3101         tm.tm_hour = v[3];
3102         tm.tm_min = v[4];
3103         tm.tm_sec = v[5];
3104         /* v[6] is the signed timezone offset, in 1/4-hour increments. */
3105         offset = ((const signed char *)v)[6];
3106         if (offset > -48 && offset < 52) {
3107                 tm.tm_hour -= offset / 4;
3108                 tm.tm_min -= (offset % 4) * 15;
3109         }
3110         t = time_from_tm(&tm);
3111         if (t == (time_t)-1)
3112                 return ((time_t)0);
3113         return (t);
3114 }
3115
3116 static time_t
3117 isodate17(const unsigned char *v)
3118 {
3119         struct tm tm;
3120         int offset;
3121         time_t t;
3122
3123         memset(&tm, 0, sizeof(tm));
3124         tm.tm_year = (v[0] - '0') * 1000 + (v[1] - '0') * 100
3125             + (v[2] - '0') * 10 + (v[3] - '0')
3126             - 1900;
3127         tm.tm_mon = (v[4] - '0') * 10 + (v[5] - '0');
3128         tm.tm_mday = (v[6] - '0') * 10 + (v[7] - '0');
3129         tm.tm_hour = (v[8] - '0') * 10 + (v[9] - '0');
3130         tm.tm_min = (v[10] - '0') * 10 + (v[11] - '0');
3131         tm.tm_sec = (v[12] - '0') * 10 + (v[13] - '0');
3132         /* v[16] is the signed timezone offset, in 1/4-hour increments. */
3133         offset = ((const signed char *)v)[16];
3134         if (offset > -48 && offset < 52) {
3135                 tm.tm_hour -= offset / 4;
3136                 tm.tm_min -= (offset % 4) * 15;
3137         }
3138         t = time_from_tm(&tm);
3139         if (t == (time_t)-1)
3140                 return ((time_t)0);
3141         return (t);
3142 }
3143
3144 static time_t
3145 time_from_tm(struct tm *t)
3146 {
3147 #if HAVE_TIMEGM
3148         /* Use platform timegm() if available. */
3149         return (timegm(t));
3150 #elif HAVE__MKGMTIME64
3151         return (_mkgmtime64(t));
3152 #else
3153         /* Else use direct calculation using POSIX assumptions. */
3154         /* First, fix up tm_yday based on the year/month/day. */
3155         if (mktime(t) == (time_t)-1)
3156                 return ((time_t)-1);
3157         /* Then we can compute timegm() from first principles. */
3158         return (t->tm_sec + t->tm_min * 60 + t->tm_hour * 3600
3159             + t->tm_yday * 86400 + (t->tm_year - 70) * 31536000
3160             + ((t->tm_year - 69) / 4) * 86400 -
3161             ((t->tm_year - 1) / 100) * 86400
3162             + ((t->tm_year + 299) / 400) * 86400);
3163 #endif
3164 }
3165
3166 static const char *
3167 build_pathname(struct archive_string *as, struct file_info *file)
3168 {
3169         if (file->parent != NULL && archive_strlen(&file->parent->name) > 0) {
3170                 build_pathname(as, file->parent);
3171                 archive_strcat(as, "/");
3172         }
3173         if (archive_strlen(&file->name) == 0)
3174                 archive_strcat(as, ".");
3175         else
3176                 archive_string_concat(as, &file->name);
3177         return (as->s);
3178 }
3179
3180 static int
3181 build_pathname_utf16be(unsigned char *p, size_t max, size_t *len,
3182     struct file_info *file)
3183 {
3184         if (file->parent != NULL && file->parent->utf16be_bytes > 0) {
3185                 if (build_pathname_utf16be(p, max, len, file->parent) != 0)
3186                         return (-1);
3187                 p[*len] = 0;
3188                 p[*len + 1] = '/';
3189                 *len += 2;
3190         }
3191         if (file->utf16be_bytes == 0) {
3192                 if (*len + 2 > max)
3193                         return (-1);/* Path is too long! */
3194                 p[*len] = 0;
3195                 p[*len + 1] = '.';
3196                 *len += 2;
3197         } else {
3198                 if (*len + file->utf16be_bytes > max)
3199                         return (-1);/* Path is too long! */
3200                 memcpy(p + *len, file->utf16be_name, file->utf16be_bytes);
3201                 *len += file->utf16be_bytes;
3202         }
3203         return (0);
3204 }
3205
3206 #if DEBUG
3207 static void
3208 dump_isodirrec(FILE *out, const unsigned char *isodirrec)
3209 {
3210         fprintf(out, " l %d,",
3211             toi(isodirrec + DR_length_offset, DR_length_size));
3212         fprintf(out, " a %d,",
3213             toi(isodirrec + DR_ext_attr_length_offset, DR_ext_attr_length_size));
3214         fprintf(out, " ext 0x%x,",
3215             toi(isodirrec + DR_extent_offset, DR_extent_size));
3216         fprintf(out, " s %d,",
3217             toi(isodirrec + DR_size_offset, DR_extent_size));
3218         fprintf(out, " f 0x%x,",
3219             toi(isodirrec + DR_flags_offset, DR_flags_size));
3220         fprintf(out, " u %d,",
3221             toi(isodirrec + DR_file_unit_size_offset, DR_file_unit_size_size));
3222         fprintf(out, " ilv %d,",
3223             toi(isodirrec + DR_interleave_offset, DR_interleave_size));
3224         fprintf(out, " seq %d,",
3225             toi(isodirrec + DR_volume_sequence_number_offset,
3226                 DR_volume_sequence_number_size));
3227         fprintf(out, " nl %d:",
3228             toi(isodirrec + DR_name_len_offset, DR_name_len_size));
3229         fprintf(out, " `%.*s'",
3230             toi(isodirrec + DR_name_len_offset, DR_name_len_size),
3231                 isodirrec + DR_name_offset);
3232 }
3233 #endif