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