text: /*-
   * Copyright (c) 2003-2007 Tim Kientzle
   * Copyright (c) 2009 Andreas Henriksson <andreas@fatal.se>
   * Copyright (c) 2009-2012 Michihiro NAKAJIMA
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   *
   * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
   * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
   * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  #include "archive_platform.h"
  __FBSDID("$FreeBSD: head/lib/libarchive/archive_read_support_format_iso9660.c 201246 2009-12-30 05:30:35Z kientzle $");
  
  #ifdef HAVE_ERRNO_H
  #include <errno.h>
  #endif
  /* #include <stdint.h> */ /* See archive_platform.h */
  #include <stdio.h>
  #ifdef HAVE_STDLIB_H
  #include <stdlib.h>
  #endif
  #ifdef HAVE_STRING_H
  #include <string.h>
  #endif
  #include <time.h>
  #ifdef HAVE_ZLIB_H
  #include <cm_zlib.h>
  #endif
  
  #include "archive.h"
  #include "archive_endian.h"
  #include "archive_entry.h"
  #include "archive_entry_locale.h"
  #include "archive_private.h"
  #include "archive_read_private.h"
  #include "archive_string.h"
  
  /*
   * An overview of ISO 9660 format:
   *
   * Each disk is laid out as follows:
   *   * 32k reserved for private use
   *   * Volume descriptor table.  Each volume descriptor
   *     is 2k and specifies basic format information.
   *     The "Primary Volume Descriptor" (PVD) is defined by the
   *     standard and should always be present; other volume
   *     descriptors include various vendor-specific extensions.
   *   * Files and directories.  Each file/dir is specified by
   *     an "extent" (starting sector and length in bytes).
   *     Dirs are just files with directory records packed one
   *     after another.  The PVD contains a single dir entry
   *     specifying the location of the root directory.  Everything
   *     else follows from there.
   *
   * This module works by first reading the volume descriptors, then
   * building a list of directory entries, sorted by starting
   * sector.  At each step, I look for the earliest dir entry that
   * hasn't yet been read, seek forward to that location and read
   * that entry.  If it's a dir, I slurp in the new dir entries and
   * add them to the heap; if it's a regular file, I return the
   * corresponding archive_entry and wait for the client to request
   * the file body.  This strategy allows us to read most compliant
   * CDs with a single pass through the data, as required by libarchive.
   */
  #define	LOGICAL_BLOCK_SIZE	2048
  #define	SYSTEM_AREA_BLOCK	16
  
  /* Structure of on-disk primary volume descriptor. */
  #define PVD_type_offset 0
  #define PVD_type_size 1
  #define PVD_id_offset (PVD_type_offset + PVD_type_size)
  #define PVD_id_size 5
  #define PVD_version_offset (PVD_id_offset + PVD_id_size)
  #define PVD_version_size 1
  #define PVD_reserved1_offset (PVD_version_offset + PVD_version_size)
  #define PVD_reserved1_size 1
  #define PVD_system_id_offset (PVD_reserved1_offset + PVD_reserved1_size)
  #define PVD_system_id_size 32
  #define PVD_volume_id_offset (PVD_system_id_offset + PVD_system_id_size)
  #define PVD_volume_id_size 32
  #define PVD_reserved2_offset (PVD_volume_id_offset + PVD_volume_id_size)
  #define PVD_reserved2_size 8
  #define PVD_volume_space_size_offset (PVD_reserved2_offset + PVD_reserved2_size)
  #define PVD_volume_space_size_size 8
  #define PVD_reserved3_offset (PVD_volume_space_size_offset + PVD_volume_space_size_size)
  #define PVD_reserved3_size 32
  #define PVD_volume_set_size_offset (PVD_reserved3_offset + PVD_reserved3_size)
  #define PVD_volume_set_size_size 4
  #define PVD_volume_sequence_number_offset (PVD_volume_set_size_offset + PVD_volume_set_size_size)
  #define PVD_volume_sequence_number_size 4
  #define PVD_logical_block_size_offset (PVD_volume_sequence_number_offset + PVD_volume_sequence_number_size)
  #define PVD_logical_block_size_size 4
  #define PVD_path_table_size_offset (PVD_logical_block_size_offset + PVD_logical_block_size_size)
  #define PVD_path_table_size_size 8
  #define PVD_type_1_path_table_offset (PVD_path_table_size_offset + PVD_path_table_size_size)
  #define PVD_type_1_path_table_size 4
  #define PVD_opt_type_1_path_table_offset (PVD_type_1_path_table_offset + PVD_type_1_path_table_size)
  #define PVD_opt_type_1_path_table_size 4
  #define PVD_type_m_path_table_offset (PVD_opt_type_1_path_table_offset + PVD_opt_type_1_path_table_size)
  #define PVD_type_m_path_table_size 4
  #define PVD_opt_type_m_path_table_offset (PVD_type_m_path_table_offset + PVD_type_m_path_table_size)
  #define PVD_opt_type_m_path_table_size 4
  #define PVD_root_directory_record_offset (PVD_opt_type_m_path_table_offset + PVD_opt_type_m_path_table_size)
  #define PVD_root_directory_record_size 34
  #define PVD_volume_set_id_offset (PVD_root_directory_record_offset + PVD_root_directory_record_size)
  #define PVD_volume_set_id_size 128
  #define PVD_publisher_id_offset (PVD_volume_set_id_offset + PVD_volume_set_id_size)
  #define PVD_publisher_id_size 128
  #define PVD_preparer_id_offset (PVD_publisher_id_offset + PVD_publisher_id_size)
  #define PVD_preparer_id_size 128
  #define PVD_application_id_offset (PVD_preparer_id_offset + PVD_preparer_id_size)
  #define PVD_application_id_size 128
  #define PVD_copyright_file_id_offset (PVD_application_id_offset + PVD_application_id_size)
  #define PVD_copyright_file_id_size 37
  #define PVD_abstract_file_id_offset (PVD_copyright_file_id_offset + PVD_copyright_file_id_size)
  #define PVD_abstract_file_id_size 37
  #define PVD_bibliographic_file_id_offset (PVD_abstract_file_id_offset + PVD_abstract_file_id_size)
  #define PVD_bibliographic_file_id_size 37
  #define PVD_creation_date_offset (PVD_bibliographic_file_id_offset + PVD_bibliographic_file_id_size)
  #define PVD_creation_date_size 17
  #define PVD_modification_date_offset (PVD_creation_date_offset + PVD_creation_date_size)
  #define PVD_modification_date_size 17
  #define PVD_expiration_date_offset (PVD_modification_date_offset + PVD_modification_date_size)
  #define PVD_expiration_date_size 17
  #define PVD_effective_date_offset (PVD_expiration_date_offset + PVD_expiration_date_size)
  #define PVD_effective_date_size 17
  #define PVD_file_structure_version_offset (PVD_effective_date_offset + PVD_effective_date_size)
  #define PVD_file_structure_version_size 1
  #define PVD_reserved4_offset (PVD_file_structure_version_offset + PVD_file_structure_version_size)
  #define PVD_reserved4_size 1
  #define PVD_application_data_offset (PVD_reserved4_offset + PVD_reserved4_size)
  #define PVD_application_data_size 512
  #define PVD_reserved5_offset (PVD_application_data_offset + PVD_application_data_size)
  #define PVD_reserved5_size (2048 - PVD_reserved5_offset)
  
  /* TODO: It would make future maintenance easier to just hardcode the
   * above values.  In particular, ECMA119 states the offsets as part of
   * the standard.  That would eliminate the need for the following check.*/
  #if PVD_reserved5_offset != 1395
  #error PVD offset and size definitions are wrong.
  #endif
  
  
  /* Structure of optional on-disk supplementary volume descriptor. */
  #define SVD_type_offset 0
  #define SVD_type_size 1
  #define SVD_id_offset (SVD_type_offset + SVD_type_size)
  #define SVD_id_size 5
  #define SVD_version_offset (SVD_id_offset + SVD_id_size)
  #define SVD_version_size 1
  /* ... */
  #define SVD_reserved1_offset	72
  #define SVD_reserved1_size	8
  #define SVD_volume_space_size_offset 80
  #define SVD_volume_space_size_size 8
  #define SVD_escape_sequences_offset (SVD_volume_space_size_offset + SVD_volume_space_size_size)
  #define SVD_escape_sequences_size 32
  /* ... */
  #define SVD_logical_block_size_offset 128
  #define SVD_logical_block_size_size 4
  #define SVD_type_L_path_table_offset 140
  #define SVD_type_M_path_table_offset 148
  /* ... */
  #define SVD_root_directory_record_offset 156
  #define SVD_root_directory_record_size 34
  #define SVD_file_structure_version_offset 881
  #define SVD_reserved2_offset	882
  #define SVD_reserved2_size	1
  #define SVD_reserved3_offset	1395
  #define SVD_reserved3_size	653
  /* ... */
  /* FIXME: validate correctness of last SVD entry offset. */
  
  /* Structure of an on-disk directory record. */
  /* Note:  ISO9660 stores each multi-byte integer twice, once in
   * each byte order.  The sizes here are the size of just one
   * of the two integers.  (This is why the offset of a field isn't
   * the same as the offset+size of the previous field.) */
  #define DR_length_offset 0
  #define DR_length_size 1
  #define DR_ext_attr_length_offset 1
  #define DR_ext_attr_length_size 1
  #define DR_extent_offset 2
  #define DR_extent_size 4
  #define DR_size_offset 10
  #define DR_size_size 4
  #define DR_date_offset 18
  #define DR_date_size 7
  #define DR_flags_offset 25
  #define DR_flags_size 1
  #define DR_file_unit_size_offset 26
  #define DR_file_unit_size_size 1
  #define DR_interleave_offset 27
  #define DR_interleave_size 1
  #define DR_volume_sequence_number_offset 28
  #define DR_volume_sequence_number_size 2
  #define DR_name_len_offset 32
  #define DR_name_len_size 1
  #define DR_name_offset 33
  
  #ifdef HAVE_ZLIB_H
  static const unsigned char zisofs_magic[8] = {
  	0x37, 0xE4, 0x53, 0x96, 0xC9, 0xDB, 0xD6, 0x07
  };
  
  struct zisofs {
  	/* Set 1 if this file compressed by paged zlib */
  	int		 pz;
  	int		 pz_log2_bs; /* Log2 of block size */
  	uint64_t	 pz_uncompressed_size;
  
  	int		 initialized;
  	unsigned char	*uncompressed_buffer;
  	size_t		 uncompressed_buffer_size;
  
  	uint32_t	 pz_offset;
  	unsigned char	 header[16];
  	size_t		 header_avail;
  	int		 header_passed;
  	unsigned char	*block_pointers;
  	size_t		 block_pointers_alloc;
  	size_t		 block_pointers_size;
  	size_t		 block_pointers_avail;
  	size_t		 block_off;
  	uint32_t	 block_avail;
  
  	z_stream	 stream;
  	int		 stream_valid;
  };
  #else
  struct zisofs {
  	/* Set 1 if this file compressed by paged zlib */
  	int		 pz;
  };
  #endif
  
  struct content {
  	uint64_t	 offset;/* Offset on disk.		*/
  	uint64_t	 size;	/* File size in bytes.		*/
  	struct content	*next;
  };
  
  /* In-memory storage for a directory record. */
  struct file_info {
  	struct file_info	*use_next;
  	struct file_info	*parent;
  	struct file_info	*next;
  	struct file_info	*re_next;
  	int		 subdirs;
  	uint64_t	 key;		/* Heap Key.			*/
  	uint64_t	 offset;	/* Offset on disk.		*/
  	uint64_t	 size;		/* File size in bytes.		*/
  	uint32_t	 ce_offset;	/* Offset of CE.		*/
  	uint32_t	 ce_size;	/* Size of CE.			*/
  	char		 rr_moved;	/* Flag to rr_moved.		*/
  	char		 rr_moved_has_re_only;
  	char		 re;		/* Having RRIP "RE" extension.	*/
  	char		 re_descendant;
  	uint64_t	 cl_offset;	/* Having RRIP "CL" extension.	*/
  	int		 birthtime_is_set;
  	time_t		 birthtime;	/* File created time.		*/
  	time_t		 mtime;		/* File last modified time.	*/
  	time_t		 atime;		/* File last accessed time.	*/
  	time_t		 ctime;		/* File attribute change time.	*/
  	uint64_t	 rdev;		/* Device number.		*/
  	mode_t		 mode;
  	uid_t		 uid;
  	gid_t		 gid;
  	int64_t		 number;
  	int		 nlinks;
  	struct archive_string name; /* Pathname */
  	unsigned char	*utf16be_name;
  	size_t		 utf16be_bytes;
  	char		 name_continues; /* Non-zero if name continues */
  	struct archive_string symlink;
  	char		 symlink_continues; /* Non-zero if link continues */
  	/* Set 1 if this file compressed by paged zlib(zisofs) */
  	int		 pz;
  	int		 pz_log2_bs; /* Log2 of block size */
  	uint64_t	 pz_uncompressed_size;
  	/* Set 1 if this file is multi extent. */
  	int		 multi_extent;
  	struct {
  		struct content	*first;
  		struct content	**last;
  	} contents;
  	struct {
  		struct file_info	*first;
  		struct file_info	**last;
  	} rede_files;
  };
  
  struct heap_queue {
  	struct file_info **files;
  	int		 allocated;
  	int		 used;
  };
  
  struct iso9660 {
  	int	magic;
  #define ISO9660_MAGIC   0x96609660
  
  	int opt_support_joliet;
  	int opt_support_rockridge;
  
  	struct archive_string pathname;
  	char	seenRockridge;	/* Set true if RR extensions are used. */
  	char	seenSUSP;	/* Set true if SUSP is being used. */
  	char	seenJoliet;
  
  	unsigned char	suspOffset;
  	struct file_info *rr_moved;
  	struct read_ce_queue {
  		struct read_ce_req {
  			uint64_t	 offset;/* Offset of CE on disk. */
  			struct file_info *file;
  		}		*reqs;
  		int		 cnt;
  		int		 allocated;
  	}	read_ce_req;
  
  	int64_t		previous_number;
  	struct archive_string previous_pathname;
  
  	struct file_info		*use_files;
  	struct heap_queue		 pending_files;
  	struct {
  		struct file_info	*first;
  		struct file_info	**last;
  	}	cache_files;
  	struct {
  		struct file_info	*first;
  		struct file_info	**last;
  	}	re_files;
  
  	uint64_t current_position;
  	ssize_t	logical_block_size;
  	uint64_t volume_size; /* Total size of volume in bytes. */
  	int32_t  volume_block;/* Total size of volume in logical blocks. */
  
  	struct vd {
  		int		location;	/* Location of Extent.	*/
  		uint32_t	size;
  	} primary, joliet;
  
  	int64_t	entry_sparse_offset;
  	int64_t	entry_bytes_remaining;
  	size_t  entry_bytes_unconsumed;
  	struct zisofs	 entry_zisofs;
  	struct content	*entry_content;
  	struct archive_string_conv *sconv_utf16be;
  	/*
  	 * Buffers for a full pathname in UTF-16BE in Joliet extensions.
  	 */
  #define UTF16_NAME_MAX	1024
  	unsigned char *utf16be_path;
  	size_t		 utf16be_path_len;
  	unsigned char *utf16be_previous_path;
  	size_t		 utf16be_previous_path_len;
  	/* Null buffer used in bidder to improve its performance. */
  	unsigned char	 null[2048];
  };
  
  static int	archive_read_format_iso9660_bid(struct archive_read *, int);
  static int	archive_read_format_iso9660_options(struct archive_read *,
  		    const char *, const char *);
  static int	archive_read_format_iso9660_cleanup(struct archive_read *);
  static int	archive_read_format_iso9660_read_data(struct archive_read *,
  		    const void **, size_t *, int64_t *);
  static int	archive_read_format_iso9660_read_data_skip(struct archive_read *);
  static int	archive_read_format_iso9660_read_header(struct archive_read *,
  		    struct archive_entry *);
  static const char *build_pathname(struct archive_string *, struct file_info *, int);
  static int	build_pathname_utf16be(unsigned char *, size_t, size_t *,
  		    struct file_info *);
  #if DEBUG
  static void	dump_isodirrec(FILE *, const unsigned char *isodirrec);
  #endif
  static time_t	time_from_tm(struct tm *);
  static time_t	isodate17(const unsigned char *);
  static time_t	isodate7(const unsigned char *);
  static int	isBootRecord(struct iso9660 *, const unsigned char *);
  static int	isVolumePartition(struct iso9660 *, const unsigned char *);
  static int	isVDSetTerminator(struct iso9660 *, const unsigned char *);
  static int	isJolietSVD(struct iso9660 *, const unsigned char *);
  static int	isSVD(struct iso9660 *, const unsigned char *);
  static int	isEVD(struct iso9660 *, const unsigned char *);
  static int	isPVD(struct iso9660 *, const unsigned char *);
  static int	next_cache_entry(struct archive_read *, struct iso9660 *,
  		    struct file_info **);
  static int	next_entry_seek(struct archive_read *, struct iso9660 *,
  		    struct file_info **);
  static struct file_info *
  		parse_file_info(struct archive_read *a,
  		    struct file_info *parent, const unsigned char *isodirrec);
  static int	parse_rockridge(struct archive_read *a,
  		    struct file_info *file, const unsigned char *start,
  		    const unsigned char *end);
  static int	register_CE(struct archive_read *a, int32_t location,
  		    struct file_info *file);
  static int	read_CE(struct archive_read *a, struct iso9660 *iso9660);
  static void	parse_rockridge_NM1(struct file_info *,
  		    const unsigned char *, int);
  static void	parse_rockridge_SL1(struct file_info *,
  		    const unsigned char *, int);
  static void	parse_rockridge_TF1(struct file_info *,
  		    const unsigned char *, int);
  static void	parse_rockridge_ZF1(struct file_info *,
  		    const unsigned char *, int);
  static void	register_file(struct iso9660 *, struct file_info *);
  static void	release_files(struct iso9660 *);
  static unsigned	toi(const void *p, int n);
  static inline void re_add_entry(struct iso9660 *, struct file_info *);
  static inline struct file_info * re_get_entry(struct iso9660 *);
  static inline int rede_add_entry(struct file_info *);
  static inline struct file_info * rede_get_entry(struct file_info *);
  static inline void cache_add_entry(struct iso9660 *iso9660,
  		    struct file_info *file);
  static inline struct file_info *cache_get_entry(struct iso9660 *iso9660);
  static int	heap_add_entry(struct archive_read *a, struct heap_queue *heap,
  		    struct file_info *file, uint64_t key);
  static struct file_info *heap_get_entry(struct heap_queue *heap);
  
  #define add_entry(arch, iso9660, file)	\
  	heap_add_entry(arch, &((iso9660)->pending_files), file, file->offset)
  #define next_entry(iso9660)		\
  	heap_get_entry(&((iso9660)->pending_files))
  
  int
  archive_read_support_format_iso9660(struct archive *_a)
  {
  	struct archive_read *a = (struct archive_read *)_a;
  	struct iso9660 *iso9660;
  	int r;
  
  	archive_check_magic(_a, ARCHIVE_READ_MAGIC,
  	    ARCHIVE_STATE_NEW, "archive_read_support_format_iso9660");
  
  	iso9660 = (struct iso9660 *)calloc(1, sizeof(*iso9660));
  	if (iso9660 == NULL) {
  		archive_set_error(&a->archive, ENOMEM,
  		    "Can't allocate iso9660 data");
  		return (ARCHIVE_FATAL);
  	}
  	iso9660->magic = ISO9660_MAGIC;
  	iso9660->cache_files.first = NULL;
  	iso9660->cache_files.last = &(iso9660->cache_files.first);
  	iso9660->re_files.first = NULL;
  	iso9660->re_files.last = &(iso9660->re_files.first);
  	/* Enable to support Joliet extensions by default.	*/
  	iso9660->opt_support_joliet = 1;
  	/* Enable to support Rock Ridge extensions by default.	*/
  	iso9660->opt_support_rockridge = 1;
  
  	r = __archive_read_register_format(a,
  	    iso9660,
  	    "iso9660",
  	    archive_read_format_iso9660_bid,
  	    archive_read_format_iso9660_options,
  	    archive_read_format_iso9660_read_header,
  	    archive_read_format_iso9660_read_data,
  	    archive_read_format_iso9660_read_data_skip,
  	    NULL,
  	    archive_read_format_iso9660_cleanup,
  	    NULL,
  	    NULL);
  
  	if (r != ARCHIVE_OK) {
  		free(iso9660);
  		return (r);
  	}
  	return (ARCHIVE_OK);
  }
  
  
  static int
  archive_read_format_iso9660_bid(struct archive_read *a, int best_bid)
  {
  	struct iso9660 *iso9660;
  	ssize_t bytes_read;
  	const unsigned char *p;
  	int seenTerminator;
  
  	/* If there's already a better bid than we can ever
  	   make, don't bother testing. */
  	if (best_bid > 48)
  		return (-1);
  
  	iso9660 = (struct iso9660 *)(a->format->data);
  
  	/*
  	 * Skip the first 32k (reserved area) and get the first
  	 * 8 sectors of the volume descriptor table.  Of course,
  	 * if the I/O layer gives us more, we'll take it.
  	 */
  #define RESERVED_AREA	(SYSTEM_AREA_BLOCK * LOGICAL_BLOCK_SIZE)
  	p = __archive_read_ahead(a,
  	    RESERVED_AREA + 8 * LOGICAL_BLOCK_SIZE,
  	    &bytes_read);
  	if (p == NULL)
  	    return (-1);
  
  	/* Skip the reserved area. */
  	bytes_read -= RESERVED_AREA;
  	p += RESERVED_AREA;
  
  	/* Check each volume descriptor. */
  	seenTerminator = 0;
  	for (; bytes_read > LOGICAL_BLOCK_SIZE;
  	    bytes_read -= LOGICAL_BLOCK_SIZE, p += LOGICAL_BLOCK_SIZE) {
  		/* Do not handle undefined Volume Descriptor Type. */
  		if (p[0] >= 4 && p[0] <= 254)
  			return (0);
  		/* Standard Identifier must be "CD001" */
  		if (memcmp(p + 1, "CD001", 5) != 0)
  			return (0);
  		if (isPVD(iso9660, p))
  			continue;
  		if (!iso9660->joliet.location) {
  			if (isJolietSVD(iso9660, p))
  				continue;
  		}
  		if (isBootRecord(iso9660, p))
  			continue;
  		if (isEVD(iso9660, p))
  			continue;
  		if (isSVD(iso9660, p))
  			continue;
  		if (isVolumePartition(iso9660, p))
  			continue;
  		if (isVDSetTerminator(iso9660, p)) {
  			seenTerminator = 1;
  			break;
  		}
  		return (0);
  	}
  	/*
  	 * ISO 9660 format must have Primary Volume Descriptor and
  	 * Volume Descriptor Set Terminator.
  	 */
  	if (seenTerminator && iso9660->primary.location > 16)
  		return (48);
  
  	/* We didn't find a valid PVD; return a bid of zero. */
  	return (0);
  }
  
  static int
  archive_read_format_iso9660_options(struct archive_read *a,
  		const char *key, const char *val)
  {
  	struct iso9660 *iso9660;
  
  	iso9660 = (struct iso9660 *)(a->format->data);
  
  	if (strcmp(key, "joliet") == 0) {
  		if (val == NULL || strcmp(val, "off") == 0 ||
  				strcmp(val, "ignore") == 0 ||
  				strcmp(val, "disable") == 0 ||
  				strcmp(val, "0") == 0)
  			iso9660->opt_support_joliet = 0;
  		else
  			iso9660->opt_support_joliet = 1;
  		return (ARCHIVE_OK);
  	}
  	if (strcmp(key, "rockridge") == 0 ||
  	    strcmp(key, "Rockridge") == 0) {
  		iso9660->opt_support_rockridge = val != NULL;
  		return (ARCHIVE_OK);
  	}
  
  	/* Note: The "warn" return is just to inform the options
  	 * supervisor that we didn't handle it.  It will generate
  	 * a suitable error if no one used this option. */
  	return (ARCHIVE_WARN);
  }
  
  static int
  isNull(struct iso9660 *iso9660, const unsigned char *h, unsigned offset,
  unsigned bytes)
  {
  
  	while (bytes >= sizeof(iso9660->null)) {
  		if (!memcmp(iso9660->null, h + offset, sizeof(iso9660->null)))
  			return (0);
  		offset += sizeof(iso9660->null);
  		bytes -= sizeof(iso9660->null);
  	}
  	if (bytes)
  		return memcmp(iso9660->null, h + offset, bytes) == 0;
  	else
  		return (1);
  }
  
  static int
  isBootRecord(struct iso9660 *iso9660, const unsigned char *h)
  {
  	(void)iso9660; /* UNUSED */
  
  	/* Type of the Volume Descriptor Boot Record must be 0. */
  	if (h[0] != 0)
  		return (0);
  
  	/* Volume Descriptor Version must be 1. */
  	if (h[6] != 1)
  		return (0);
  
  	return (1);
  }
  
  static int
  isVolumePartition(struct iso9660 *iso9660, const unsigned char *h)
  {
  	int32_t location;
  
  	/* Type of the Volume Partition Descriptor must be 3. */
  	if (h[0] != 3)
  		return (0);
  
  	/* Volume Descriptor Version must be 1. */
  	if (h[6] != 1)
  		return (0);
  	/* Unused Field */
  	if (h[7] != 0)
  		return (0);
  
  	location = archive_le32dec(h + 72);
  	if (location <= SYSTEM_AREA_BLOCK ||
  	    location >= iso9660->volume_block)
  		return (0);
  	if ((uint32_t)location != archive_be32dec(h + 76))
  		return (0);
  
  	return (1);
  }
  
  static int
  isVDSetTerminator(struct iso9660 *iso9660, const unsigned char *h)
  {
  	(void)iso9660; /* UNUSED */
  
  	/* Type of the Volume Descriptor Set Terminator must be 255. */
  	if (h[0] != 255)
  		return (0);
  
  	/* Volume Descriptor Version must be 1. */
  	if (h[6] != 1)
  		return (0);
  
  	/* Reserved field must be 0. */
  	if (!isNull(iso9660, h, 7, 2048-7))
  		return (0);
  
  	return (1);
  }
  
  static int
  isJolietSVD(struct iso9660 *iso9660, const unsigned char *h)
  {
  	const unsigned char *p;
  	ssize_t logical_block_size;
  	int32_t volume_block;
  
  	/* Check if current sector is a kind of Supplementary Volume
  	 * Descriptor. */
  	if (!isSVD(iso9660, h))
  		return (0);
  
  	/* FIXME: do more validations according to joliet spec. */
  
  	/* check if this SVD contains joliet extension! */
  	p = h + SVD_escape_sequences_offset;
  	/* N.B. Joliet spec says p[1] == '\\', but.... */
  	if (p[0] == '%' && p[1] == '/') {
  		int level = 0;
  
  		if (p[2] == '@')
  			level = 1;
  		else if (p[2] == 'C')
  			level = 2;
  		else if (p[2] == 'E')
  			level = 3;
  		else /* not joliet */
  			return (0);
  
  		iso9660->seenJoliet = level;
  
  	} else /* not joliet */
  		return (0);
  
  	logical_block_size =
  	    archive_le16dec(h + SVD_logical_block_size_offset);
  	volume_block = archive_le32dec(h + SVD_volume_space_size_offset);
  
  	iso9660->logical_block_size = logical_block_size;
  	iso9660->volume_block = volume_block;
  	iso9660->volume_size = logical_block_size * (uint64_t)volume_block;
  	/* Read Root Directory Record in Volume Descriptor. */
  	p = h + SVD_root_directory_record_offset;
  	iso9660->joliet.location = archive_le32dec(p + DR_extent_offset);
  	iso9660->joliet.size = archive_le32dec(p + DR_size_offset);
  
  	return (48);
  }
  
  static int
  isSVD(struct iso9660 *iso9660, const unsigned char *h)
  {
  	const unsigned char *p;
  	ssize_t logical_block_size;
  	int32_t volume_block;
  	int32_t location;
  
  	(void)iso9660; /* UNUSED */
  
  	/* Type 2 means it's a SVD. */
  	if (h[SVD_type_offset] != 2)
  		return (0);
  
  	/* Reserved field must be 0. */
  	if (!isNull(iso9660, h, SVD_reserved1_offset, SVD_reserved1_size))
  		return (0);
  	if (!isNull(iso9660, h, SVD_reserved2_offset, SVD_reserved2_size))
  		return (0);
  	if (!isNull(iso9660, h, SVD_reserved3_offset, SVD_reserved3_size))
  		return (0);
  
  	/* File structure version must be 1 for ISO9660/ECMA119. */
  	if (h[SVD_file_structure_version_offset] != 1)
  		return (0);
  
  	logical_block_size =
  	    archive_le16dec(h + SVD_logical_block_size_offset);
  	if (logical_block_size <= 0)
  		return (0);
  
  	volume_block = archive_le32dec(h + SVD_volume_space_size_offset);
  	if (volume_block <= SYSTEM_AREA_BLOCK+4)
  		return (0);
  
  	/* Location of Occurrence of Type L Path Table must be
  	 * available location,
  	 * >= SYSTEM_AREA_BLOCK(16) + 2 and < Volume Space Size. */
  	location = archive_le32dec(h+SVD_type_L_path_table_offset);
  	if (location < SYSTEM_AREA_BLOCK+2 || location >= volume_block)
  		return (0);
  
  	/* The Type M Path Table must be at a valid location (WinISO
  	 * and probably other programs omit this, so we allow zero)
  	 *
  	 * >= SYSTEM_AREA_BLOCK(16) + 2 and < Volume Space Size. */
  	location = archive_be32dec(h+SVD_type_M_path_table_offset);
  	if ((location > 0 && location < SYSTEM_AREA_BLOCK+2)
  	    || location >= volume_block)
  		return (0);
  
  	/* Read Root Directory Record in Volume Descriptor. */
  	p = h + SVD_root_directory_record_offset;
  	if (p[DR_length_offset] != 34)
  		return (0);
  
  	return (48);
  }
  
  static int
  isEVD(struct iso9660 *iso9660, const unsigned char *h)
  {
  	const unsigned char *p;
  	ssize_t logical_block_size;
  	int32_t volume_block;
  	int32_t location;
  
  	(void)iso9660; /* UNUSED */
  
  	/* Type of the Enhanced Volume Descriptor must be 2. */
  	if (h[PVD_type_offset] != 2)
  		return (0);
  
  	/* EVD version must be 2. */
  	if (h[PVD_version_offset] != 2)
  		return (0);
  
  	/* Reserved field must be 0. */
  	if (h[PVD_reserved1_offset] != 0)
  		return (0);
  
  	/* Reserved field must be 0. */
  	if (!isNull(iso9660, h, PVD_reserved2_offset, PVD_reserved2_size))
  		return (0);
  
  	/* Reserved field must be 0. */
  	if (!isNull(iso9660, h, PVD_reserved3_offset, PVD_reserved3_size))
  		return (0);
  
  	/* Logical block size must be > 0. */
  	/* I've looked at Ecma 119 and can't find any stronger
  	 * restriction on this field. */
  	logical_block_size =
  	    archive_le16dec(h + PVD_logical_block_size_offset);
  	if (logical_block_size <= 0)
  		return (0);
  
  	volume_block =
  	    archive_le32dec(h + PVD_volume_space_size_offset);
  	if (volume_block <= SYSTEM_AREA_BLOCK+4)
  		return (0);
  
  	/* File structure version must be 2 for ISO9660:1999. */
  	if (h[PVD_file_structure_version_offset] != 2)
  		return (0);
  
  	/* Location of Occurrence of Type L Path Table must be
  	 * available location,
  	 * >= SYSTEM_AREA_BLOCK(16) + 2 and < Volume Space Size. */
  	location = archive_le32dec(h+PVD_type_1_path_table_offset);
  	if (location < SYSTEM_AREA_BLOCK+2 || location >= volume_block)
  		return (0);
  
  	/* Location of Occurrence of Type M Path Table must be
  	 * available location,
  	 * >= SYSTEM_AREA_BLOCK(16) + 2 and < Volume Space Size. */
  	location = archive_be32dec(h+PVD_type_m_path_table_offset);
  	if ((location > 0 && location < SYSTEM_AREA_BLOCK+2)
  	    || location >= volume_block)
  		return (0);
  
  	/* Reserved field must be 0. */
  	if (!isNull(iso9660, h, PVD_reserved4_offset, PVD_reserved4_size))
  		return (0);
  
  	/* Reserved field must be 0. */
  	if (!isNull(iso9660, h, PVD_reserved5_offset, PVD_reserved5_size))
  		return (0);
  
  	/* Read Root Directory Record in Volume Descriptor. */
  	p = h + PVD_root_directory_record_offset;
  	if (p[DR_length_offset] != 34)
  		return (0);
  
  	return (48);
  }
  
  static int
  isPVD(struct iso9660 *iso9660, const unsigned char *h)
  {
  	const unsigned char *p;
  	ssize_t logical_block_size;
  	int32_t volume_block;
  	int32_t location;
  	int i;
  
  	/* Type of the Primary Volume Descriptor must be 1. */
  	if (h[PVD_type_offset] != 1)
  		return (0);
  
  	/* PVD version must be 1. */
  	if (h[PVD_version_offset] != 1)
  		return (0);
  
  	/* Reserved field must be 0. */
  	if (h[PVD_reserved1_offset] != 0)
  		return (0);
  
  	/* Reserved field must be 0. */
  	if (!isNull(iso9660, h, PVD_reserved2_offset, PVD_reserved2_size))
  		return (0);
  
  	/* Reserved field must be 0. */
  	if (!isNull(iso9660, h, PVD_reserved3_offset, PVD_reserved3_size))
  		return (0);
  
  	/* Logical block size must be > 0. */
  	/* I've looked at Ecma 119 and can't find any stronger
  	 * restriction on this field. */
  	logical_block_size =
  	    archive_le16dec(h + PVD_logical_block_size_offset);
  	if (logical_block_size <= 0)
  		return (0);
  
  	volume_block = archive_le32dec(h + PVD_volume_space_size_offset);
  	if (volume_block <= SYSTEM_AREA_BLOCK+4)
  		return (0);
  
  	/* File structure version must be 1 for ISO9660/ECMA119. */
  	if (h[PVD_file_structure_version_offset] != 1)
  		return (0);
  
  	/* Location of Occurrence of Type L Path Table must be
  	 * available location,
  	 * > SYSTEM_AREA_BLOCK(16) + 2 and < Volume Space Size. */
  	location = archive_le32dec(h+PVD_type_1_path_table_offset);
  	if (location < SYSTEM_AREA_BLOCK+2 || location >= volume_block)
  		return (0);
  
  	/* The Type M Path Table must also be at a valid location
  	 * (although ECMA 119 requires a Type M Path Table, WinISO and
  	 * probably other programs omit it, so we permit a zero here)
  	 *
  	 * >= SYSTEM_AREA_BLOCK(16) + 2 and < Volume Space Size. */
  	location = archive_be32dec(h+PVD_type_m_path_table_offset);
  	if ((location > 0 && location < SYSTEM_AREA_BLOCK+2)
  	    || location >= volume_block)
  		return (0);
  
  	/* Reserved field must be 0. */
  	/* But accept NetBSD/FreeBSD "makefs" images with 0x20 here. */
  	for (i = 0; i < PVD_reserved4_size; ++i)
  		if (h[PVD_reserved4_offset + i] != 0
  		    && h[PVD_reserved4_offset + i] != 0x20)
  			return (0);
  
  	/* Reserved field must be 0. */
  	if (!isNull(iso9660, h, PVD_reserved5_offset, PVD_reserved5_size))
  		return (0);
  
  	/* XXX TODO: Check other values for sanity; reject more
  	 * malformed PVDs. XXX */
  
  	/* Read Root Directory Record in Volume Descriptor. */
  	p = h + PVD_root_directory_record_offset;
  	if (p[DR_length_offset] != 34)
  		return (0);
  
  	if (!iso9660->primary.location) {
  		iso9660->logical_block_size = logical_block_size;
  		iso9660->volume_block = volume_block;
  		iso9660->volume_size =
  		    logical_block_size * (uint64_t)volume_block;
  		iso9660->primary.location =
  		    archive_le32dec(p + DR_extent_offset);
  		iso9660->primary.size = archive_le32dec(p + DR_size_offset);
  	}
  
  	return (48);
  }
  
  static int
  read_children(struct archive_read *a, struct file_info *parent)
  {
  	struct iso9660 *iso9660;
  	const unsigned char *b, *p;
  	struct file_info *multi;
  	size_t step, skip_size;
  
  	iso9660 = (struct iso9660 *)(a->format->data);
  	/* flush any remaining bytes from the last round to ensure
  	 * we're positioned */
  	if (iso9660->entry_bytes_unconsumed) {
  		__archive_read_consume(a, iso9660->entry_bytes_unconsumed);
  		iso9660->entry_bytes_unconsumed = 0;
  	}
  	if (iso9660->current_position > parent->offset) {
  		archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
  		    "Ignoring out-of-order directory (%s) %jd > %jd",
  		    parent->name.s,
  		    (intmax_t)iso9660->current_position,
  		    (intmax_t)parent->offset);
  		return (ARCHIVE_WARN);
  	}
  	if (parent->offset + parent->size > iso9660->volume_size) {
  		archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
  		    "Directory is beyond end-of-media: %s",
  		    parent->name.s);
  		return (ARCHIVE_WARN);
  	}
  	if (iso9660->current_position < parent->offset) {
  		int64_t skipsize;
  
  		skipsize = parent->offset - iso9660->current_position;
  		skipsize = __archive_read_consume(a, skipsize);
  		if (skipsize < 0)
  			return ((int)skipsize);
  		iso9660->current_position = parent->offset;
  	}
  
  	step = (size_t)(((parent->size + iso9660->logical_block_size -1) /
  	    iso9660->logical_block_size) * iso9660->logical_block_size);
  	b = __archive_read_ahead(a, step, NULL);
  	if (b == NULL) {
  		archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
  		    "Failed to read full block when scanning "
  		    "ISO9660 directory list");
  		return (ARCHIVE_FATAL);
  	}
  	iso9660->current_position += step;
  	multi = NULL;
  	skip_size = step;
  	while (step) {
  		p = b;
  		b += iso9660->logical_block_size;
  		step -= iso9660->logical_block_size;
  		for (; *p != 0 && p < b && p + *p <= b; p += *p) {
  			struct file_info *child;
  
  			/* N.B.: these special directory identifiers
  			 * are 8 bit "values" even on a
  			 * Joliet CD with UCS-2 (16bit) encoding.
  			 */
  
  			/* Skip '.' entry. */
  			if (*(p + DR_name_len_offset) == 1
  			    && *(p + DR_name_offset) == '\0')
  				continue;
  			/* Skip '..' entry. */
  			if (*(p + DR_name_len_offset) == 1
  			    && *(p + DR_name_offset) == '\001')
  				continue;
  			child = parse_file_info(a, parent, p);
  			if (child == NULL) {
  				__archive_read_consume(a, skip_size);
  				return (ARCHIVE_FATAL);
  			}
  			if (child->cl_offset == 0 &&
  			    (child->multi_extent || multi != NULL)) {
  				struct content *con;
  
  				if (multi == NULL) {
  					multi = child;
  					multi->contents.first = NULL;
  					multi->contents.last =
  					    &(multi->contents.first);
  				}
  				con = malloc(sizeof(struct content));
  				if (con == NULL) {
  					archive_set_error(
  					    &a->archive, ENOMEM,
  					    "No memory for multi extent");
  					__archive_read_consume(a, skip_size);
  					return (ARCHIVE_FATAL);
  				}
  				con->offset = child->offset;
  				con->size = child->size;
  				con->next = NULL;
  				*multi->contents.last = con;
  				multi->contents.last = &(con->next);
  				if (multi == child) {
  					if (add_entry(a, iso9660, child)
  					    != ARCHIVE_OK)
  						return (ARCHIVE_FATAL);
  				} else {
  					multi->size += child->size;
  					if (!child->multi_extent)
  						multi = NULL;
  				}
  			} else
  				if (add_entry(a, iso9660, child) != ARCHIVE_OK)
  					return (ARCHIVE_FATAL);
  		}
  	}
  
  	__archive_read_consume(a, skip_size);
  
  	/* Read data which recorded by RRIP "CE" extension. */
  	if (read_CE(a, iso9660) != ARCHIVE_OK)
  		return (ARCHIVE_FATAL);
  
  	return (ARCHIVE_OK);
  }
  
  static int
  choose_volume(struct archive_read *a, struct iso9660 *iso9660)
  {
  	struct file_info *file;
  	int64_t skipsize;
  	struct vd *vd;
  	const void *block;
  	char seenJoliet;
  
  	vd = &(iso9660->primary);
  	if (!iso9660->opt_support_joliet)
  		iso9660->seenJoliet = 0;
  	if (iso9660->seenJoliet &&
  		vd->location > iso9660->joliet.location)
  		/* This condition is unlikely; by way of caution. */
  		vd = &(iso9660->joliet);
  
  	skipsize = LOGICAL_BLOCK_SIZE * (int64_t)vd->location;
  	skipsize = __archive_read_consume(a, skipsize);
  	if (skipsize < 0)
  		return ((int)skipsize);
  	iso9660->current_position = skipsize;
  
  	block = __archive_read_ahead(a, vd->size, NULL);
  	if (block == NULL) {
  		archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
  		    "Failed to read full block when scanning "
  		    "ISO9660 directory list");
  		return (ARCHIVE_FATAL);
  	}
  
  	/*
  	 * While reading Root Directory, flag seenJoliet must be zero to
  	 * avoid converting special name 0x00(Current Directory) and
  	 * next byte to UCS2.
  	 */
  	seenJoliet = iso9660->seenJoliet;/* Save flag. */
  	iso9660->seenJoliet = 0;
  	file = parse_file_info(a, NULL, block);
  	if (file == NULL)
  		return (ARCHIVE_FATAL);
  	iso9660->seenJoliet = seenJoliet;
  
  	/*
  	 * If the iso image has both RockRidge and Joliet, we preferentially
  	 * use RockRidge Extensions rather than Joliet ones.
  	 */
  	if (vd == &(iso9660->primary) && iso9660->seenRockridge
  	    && iso9660->seenJoliet)
  		iso9660->seenJoliet = 0;
  
  	if (vd == &(iso9660->primary) && !iso9660->seenRockridge
  	    && iso9660->seenJoliet) {
  		/* Switch reading data from primary to joliet. */
  		vd = &(iso9660->joliet);
  		skipsize = LOGICAL_BLOCK_SIZE * (int64_t)vd->location;
  		skipsize -= iso9660->current_position;
  		skipsize = __archive_read_consume(a, skipsize);
  		if (skipsize < 0)
  			return ((int)skipsize);
  		iso9660->current_position += skipsize;
  
  		block = __archive_read_ahead(a, vd->size, NULL);
  		if (block == NULL) {
  			archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
  			    "Failed to read full block when scanning "
  			    "ISO9660 directory list");
  			return (ARCHIVE_FATAL);
  		}
  		iso9660->seenJoliet = 0;
  		file = parse_file_info(a, NULL, block);
  		if (file == NULL)
  			return (ARCHIVE_FATAL);
  		iso9660->seenJoliet = seenJoliet;
  	}
  
  	/* Store the root directory in the pending list. */
  	if (add_entry(a, iso9660, file) != ARCHIVE_OK)
  		return (ARCHIVE_FATAL);
  	if (iso9660->seenRockridge) {
  		a->archive.archive_format = ARCHIVE_FORMAT_ISO9660_ROCKRIDGE;
  		a->archive.archive_format_name =
  		    "ISO9660 with Rockridge extensions";
  	}
  
  	return (ARCHIVE_OK);
  }
  
  static int
  archive_read_format_iso9660_read_header(struct archive_read *a,
      struct archive_entry *entry)
  {
  	struct iso9660 *iso9660;
  	struct file_info *file;
  	int r, rd_r = ARCHIVE_OK;
  
  	iso9660 = (struct iso9660 *)(a->format->data);
  
  	if (!a->archive.archive_format) {
  		a->archive.archive_format = ARCHIVE_FORMAT_ISO9660;
  		a->archive.archive_format_name = "ISO9660";
  	}
  
  	if (iso9660->current_position == 0) {
  		r = choose_volume(a, iso9660);
  		if (r != ARCHIVE_OK)
  			return (r);
  	}
  
  	file = NULL;/* Eliminate a warning. */
  	/* Get the next entry that appears after the current offset. */
  	r = next_entry_seek(a, iso9660, &file);
  	if (r != ARCHIVE_OK)
  		return (r);
  
  	if (iso9660->seenJoliet) {
  		/*
  		 * Convert UTF-16BE of a filename to local locale MBS
  		 * and store the result into a filename field.
  		 */
  		if (iso9660->sconv_utf16be == NULL) {
  			iso9660->sconv_utf16be =
  			    archive_string_conversion_from_charset(
  				&(a->archive), "UTF-16BE", 1);
  			if (iso9660->sconv_utf16be == NULL)
  				/* Couldn't allocate memory */
  				return (ARCHIVE_FATAL);
  		}
  		if (iso9660->utf16be_path == NULL) {
  			iso9660->utf16be_path = malloc(UTF16_NAME_MAX);
  			if (iso9660->utf16be_path == NULL) {
  				archive_set_error(&a->archive, ENOMEM,
  				    "No memory");
  				return (ARCHIVE_FATAL);
  			}
  		}
  		if (iso9660->utf16be_previous_path == NULL) {
  			iso9660->utf16be_previous_path = malloc(UTF16_NAME_MAX);
  			if (iso9660->utf16be_previous_path == NULL) {
  				archive_set_error(&a->archive, ENOMEM,
  				    "No memory");
  				return (ARCHIVE_FATAL);
  			}
  		}
  
  		iso9660->utf16be_path_len = 0;
  		if (build_pathname_utf16be(iso9660->utf16be_path,
  		    UTF16_NAME_MAX, &(iso9660->utf16be_path_len), file) != 0) {
  			archive_set_error(&a->archive,
  			    ARCHIVE_ERRNO_FILE_FORMAT,
  			    "Pathname is too long");
  			return (ARCHIVE_FATAL);
  		}
  
  		r = archive_entry_copy_pathname_l(entry,
  		    (const char *)iso9660->utf16be_path,
  		    iso9660->utf16be_path_len,
  		    iso9660->sconv_utf16be);
  		if (r != 0) {
  			if (errno == ENOMEM) {
  				archive_set_error(&a->archive, ENOMEM,
  				    "No memory for Pathname");
  				return (ARCHIVE_FATAL);
  			}
  			archive_set_error(&a->archive,
  			    ARCHIVE_ERRNO_FILE_FORMAT,
  			    "Pathname cannot be converted "
  			    "from %s to current locale.",
  			    archive_string_conversion_charset_name(
  			      iso9660->sconv_utf16be));
  
  			rd_r = ARCHIVE_WARN;
  		}
  	} else {
  		const char *path = build_pathname(&iso9660->pathname, file, 0);
  		if (path == NULL) {
  			archive_set_error(&a->archive,
  			    ARCHIVE_ERRNO_FILE_FORMAT,
  			    "Pathname is too long");
  			return (ARCHIVE_FATAL);
  		} else {
  			archive_string_empty(&iso9660->pathname);
  			archive_entry_set_pathname(entry, path);
  		}
  	}
  
  	iso9660->entry_bytes_remaining = file->size;
  	/* Offset for sparse-file-aware clients. */
  	iso9660->entry_sparse_offset = 0;
  
  	if (file->offset + file->size > iso9660->volume_size) {
  		archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
  		    "File is beyond end-of-media: %s",
  		    archive_entry_pathname(entry));
  		iso9660->entry_bytes_remaining = 0;
  		return (ARCHIVE_WARN);
  	}
  
  	/* Set up the entry structure with information about this entry. */
  	archive_entry_set_mode(entry, file->mode);
  	archive_entry_set_uid(entry, file->uid);
  	archive_entry_set_gid(entry, file->gid);
  	archive_entry_set_nlink(entry, file->nlinks);
  	if (file->birthtime_is_set)
  		archive_entry_set_birthtime(entry, file->birthtime, 0);
  	else
  		archive_entry_unset_birthtime(entry);
  	archive_entry_set_mtime(entry, file->mtime, 0);
  	archive_entry_set_ctime(entry, file->ctime, 0);
  	archive_entry_set_atime(entry, file->atime, 0);
  	/* N.B.: Rock Ridge supports 64-bit device numbers. */
  	archive_entry_set_rdev(entry, (dev_t)file->rdev);
  	archive_entry_set_size(entry, iso9660->entry_bytes_remaining);
  	if (file->symlink.s != NULL)
  		archive_entry_copy_symlink(entry, file->symlink.s);
  
  	/* Note: If the input isn't seekable, we can't rewind to
  	 * return the same body again, so if the next entry refers to
  	 * the same data, we have to return it as a hardlink to the
  	 * original entry. */
  	if (file->number != -1 &&
  	    file->number == iso9660->previous_number) {
  		if (iso9660->seenJoliet) {
  			r = archive_entry_copy_hardlink_l(entry,
  			    (const char *)iso9660->utf16be_previous_path,
  			    iso9660->utf16be_previous_path_len,
  			    iso9660->sconv_utf16be);
  			if (r != 0) {
  				if (errno == ENOMEM) {
  					archive_set_error(&a->archive, ENOMEM,
  					    "No memory for Linkname");
  					return (ARCHIVE_FATAL);
  				}
  				archive_set_error(&a->archive,
  				    ARCHIVE_ERRNO_FILE_FORMAT,
  				    "Linkname cannot be converted "
  				    "from %s to current locale.",
  				    archive_string_conversion_charset_name(
  				      iso9660->sconv_utf16be));
  				rd_r = ARCHIVE_WARN;
  			}
  		} else
  			archive_entry_set_hardlink(entry,
  			    iso9660->previous_pathname.s);
  		archive_entry_unset_size(entry);
  		iso9660->entry_bytes_remaining = 0;
  		return (rd_r);
  	}
  
  	if ((file->mode & AE_IFMT) != AE_IFDIR &&
  	    file->offset < iso9660->current_position) {
  		int64_t r64;
  
  		r64 = __archive_read_seek(a, file->offset, SEEK_SET);
  		if (r64 != (int64_t)file->offset) {
  			/* We can't seek backwards to extract it, so issue
  			 * a warning.  Note that this can only happen if
  			 * this entry was added to the heap after we passed
  			 * this offset, that is, only if the directory
  			 * mentioning this entry is later than the body of
  			 * the entry. Such layouts are very unusual; most
  			 * ISO9660 writers lay out and record all directory
  			 * information first, then store all file bodies. */
  			archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
  			    "Ignoring out-of-order file @%jx (%s) %jd < %jd",
  			    (intmax_t)file->number,
  			    iso9660->pathname.s,
  			    (intmax_t)file->offset,
  			    (intmax_t)iso9660->current_position);
  			iso9660->entry_bytes_remaining = 0;
  			return (ARCHIVE_WARN);
  		}
  		iso9660->current_position = (uint64_t)r64;
  	}
  
  	/* Initialize zisofs variables. */
  	iso9660->entry_zisofs.pz = file->pz;
  	if (file->pz) {
  #ifdef HAVE_ZLIB_H
  		struct zisofs  *zisofs;
  
  		zisofs = &iso9660->entry_zisofs;
  		zisofs->initialized = 0;
  		zisofs->pz_log2_bs = file->pz_log2_bs;
  		zisofs->pz_uncompressed_size = file->pz_uncompressed_size;
  		zisofs->pz_offset = 0;
  		zisofs->header_avail = 0;
  		zisofs->header_passed = 0;
  		zisofs->block_pointers_avail = 0;
  #endif
  		archive_entry_set_size(entry, file->pz_uncompressed_size);
  	}
  
  	iso9660->previous_number = file->number;
  	if (iso9660->seenJoliet) {
  		memcpy(iso9660->utf16be_previous_path, iso9660->utf16be_path,
  		    iso9660->utf16be_path_len);
  		iso9660->utf16be_previous_path_len = iso9660->utf16be_path_len;
  	} else
  		archive_strcpy(
  		    &iso9660->previous_pathname, iso9660->pathname.s);
  
  	/* Reset entry_bytes_remaining if the file is multi extent. */
  	iso9660->entry_content = file->contents.first;
  	if (iso9660->entry_content != NULL)
  		iso9660->entry_bytes_remaining = iso9660->entry_content->size;
  
  	if (archive_entry_filetype(entry) == AE_IFDIR) {
  		/* Overwrite nlinks by proper link number which is
  		 * calculated from number of sub directories. */
  		archive_entry_set_nlink(entry, 2 + file->subdirs);
  		/* Directory data has been read completely. */
  		iso9660->entry_bytes_remaining = 0;
  	}
  
  	if (rd_r != ARCHIVE_OK)
  		return (rd_r);
  	return (ARCHIVE_OK);
  }
  
  static int
  archive_read_format_iso9660_read_data_skip(struct archive_read *a)
  {
  	/* Because read_next_header always does an explicit skip
  	 * to the next entry, we don't need to do anything here. */
  	(void)a; /* UNUSED */
  	return (ARCHIVE_OK);
  }
  
  #ifdef HAVE_ZLIB_H
  
  static int
  zisofs_read_data(struct archive_read *a,
      const void **buff, size_t *size, int64_t *offset)
  {
  	struct iso9660 *iso9660;
  	struct zisofs  *zisofs;
  	const unsigned char *p;
  	size_t avail;
  	ssize_t bytes_read;
  	size_t uncompressed_size;
  	int r;
  
  	iso9660 = (struct iso9660 *)(a->format->data);
  	zisofs = &iso9660->entry_zisofs;
  
  	p = __archive_read_ahead(a, 1, &bytes_read);
  	if (bytes_read <= 0) {
  		archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
  		    "Truncated zisofs file body");
  		return (ARCHIVE_FATAL);
  	}
  	if (bytes_read > iso9660->entry_bytes_remaining)
  		bytes_read = (ssize_t)iso9660->entry_bytes_remaining;
  	avail = bytes_read;
  	uncompressed_size = 0;
  
  	if (!zisofs->initialized) {
  		size_t ceil, xsize;
  
  		/* Allocate block pointers buffer. */
  		ceil = (size_t)((zisofs->pz_uncompressed_size +
  			(((int64_t)1) << zisofs->pz_log2_bs) - 1)
  			>> zisofs->pz_log2_bs);
  		xsize = (ceil + 1) * 4;
  		if (zisofs->block_pointers_alloc < xsize) {
  			size_t alloc;
  
  			if (zisofs->block_pointers != NULL)
  				free(zisofs->block_pointers);
  			alloc = ((xsize >> 10) + 1) << 10;
  			zisofs->block_pointers = malloc(alloc);
  			if (zisofs->block_pointers == NULL) {
  				archive_set_error(&a->archive, ENOMEM,
  				    "No memory for zisofs decompression");
  				return (ARCHIVE_FATAL);
  			}
  			zisofs->block_pointers_alloc = alloc;
  		}
  		zisofs->block_pointers_size = xsize;
  
  		/* Allocate uncompressed data buffer. */
  		xsize = (size_t)1UL << zisofs->pz_log2_bs;
  		if (zisofs->uncompressed_buffer_size < xsize) {
  			if (zisofs->uncompressed_buffer != NULL)
  				free(zisofs->uncompressed_buffer);
  			zisofs->uncompressed_buffer = malloc(xsize);
  			if (zisofs->uncompressed_buffer == NULL) {
  				archive_set_error(&a->archive, ENOMEM,
  				    "No memory for zisofs decompression");
  				return (ARCHIVE_FATAL);
  			}
  		}
  		zisofs->uncompressed_buffer_size = xsize;
  
  		/*
  		 * Read the file header, and check the magic code of zisofs.
  		 */
  		if (zisofs->header_avail < sizeof(zisofs->header)) {
  			xsize = sizeof(zisofs->header) - zisofs->header_avail;
  			if (avail < xsize)
  				xsize = avail;
  			memcpy(zisofs->header + zisofs->header_avail, p, xsize);
  			zisofs->header_avail += xsize;
  			avail -= xsize;
  			p += xsize;
  		}
  		if (!zisofs->header_passed &&
  		    zisofs->header_avail == sizeof(zisofs->header)) {
  			int err = 0;
  
  			if (memcmp(zisofs->header, zisofs_magic,
  			    sizeof(zisofs_magic)) != 0)
  				err = 1;
  			if (archive_le32dec(zisofs->header + 8)
  			    != zisofs->pz_uncompressed_size)
  				err = 1;
  			if (zisofs->header[12] != 4)
  				err = 1;
  			if (zisofs->header[13] != zisofs->pz_log2_bs)
  				err = 1;
  			if (err) {
  				archive_set_error(&a->archive,
  				    ARCHIVE_ERRNO_FILE_FORMAT,
  				    "Illegal zisofs file body");
  				return (ARCHIVE_FATAL);
  			}
  			zisofs->header_passed = 1;
  		}
  		/*
  		 * Read block pointers.
  		 */
  		if (zisofs->header_passed &&
  		    zisofs->block_pointers_avail < zisofs->block_pointers_size) {
  			xsize = zisofs->block_pointers_size
  			    - zisofs->block_pointers_avail;
  			if (avail < xsize)
  				xsize = avail;
  			memcpy(zisofs->block_pointers
  			    + zisofs->block_pointers_avail, p, xsize);
  			zisofs->block_pointers_avail += xsize;
  			avail -= xsize;
  			p += xsize;
  		    	if (zisofs->block_pointers_avail
  			    == zisofs->block_pointers_size) {
  				/* We've got all block pointers and initialize
  				 * related variables.	*/
  				zisofs->block_off = 0;
  				zisofs->block_avail = 0;
  				/* Complete a initialization */
  				zisofs->initialized = 1;
  			}
  		}
  
  		if (!zisofs->initialized)
  			goto next_data; /* We need more data. */
  	}
  
  	/*
  	 * Get block offsets from block pointers.
  	 */
  	if (zisofs->block_avail == 0) {
  		uint32_t bst, bed;
  
  		if (zisofs->block_off + 4 >= zisofs->block_pointers_size) {
  			/* There isn't a pair of offsets. */
  			archive_set_error(&a->archive,
  			    ARCHIVE_ERRNO_FILE_FORMAT,
  			    "Illegal zisofs block pointers");
  			return (ARCHIVE_FATAL);
  		}
  		bst = archive_le32dec(
  		    zisofs->block_pointers + zisofs->block_off);
  		if (bst != zisofs->pz_offset + (bytes_read - avail)) {
  			/* TODO: Should we seek offset of current file
  			 * by bst ? */
  			archive_set_error(&a->archive,
  			    ARCHIVE_ERRNO_FILE_FORMAT,
  			    "Illegal zisofs block pointers(cannot seek)");
  			return (ARCHIVE_FATAL);
  		}
  		bed = archive_le32dec(
  		    zisofs->block_pointers + zisofs->block_off + 4);
  		if (bed < bst) {
  			archive_set_error(&a->archive,
  			    ARCHIVE_ERRNO_FILE_FORMAT,
  			    "Illegal zisofs block pointers");
  			return (ARCHIVE_FATAL);
  		}
  		zisofs->block_avail = bed - bst;
  		zisofs->block_off += 4;
  
  		/* Initialize compression library for new block. */
  		if (zisofs->stream_valid)
  			r = inflateReset(&zisofs->stream);
  		else
  			r = inflateInit(&zisofs->stream);
  		if (r != Z_OK) {
  			archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
  			    "Can't initialize zisofs decompression.");
  			return (ARCHIVE_FATAL);
  		}
  		zisofs->stream_valid = 1;
  		zisofs->stream.total_in = 0;
  		zisofs->stream.total_out = 0;
  	}
  
  	/*
  	 * Make uncompressed data.
  	 */
  	if (zisofs->block_avail == 0) {
  		memset(zisofs->uncompressed_buffer, 0,
  		    zisofs->uncompressed_buffer_size);
  		uncompressed_size = zisofs->uncompressed_buffer_size;
  	} else {
  		zisofs->stream.next_in = (Bytef *)(uintptr_t)(const void *)p;
  		if (avail > zisofs->block_avail)
  			zisofs->stream.avail_in = zisofs->block_avail;
  		else
  			zisofs->stream.avail_in = (uInt)avail;
  		zisofs->stream.next_out = zisofs->uncompressed_buffer;
  		zisofs->stream.avail_out =
  		    (uInt)zisofs->uncompressed_buffer_size;
  
  		r = inflate(&zisofs->stream, 0);
  		switch (r) {
  		case Z_OK: /* Decompressor made some progress.*/
  		case Z_STREAM_END: /* Found end of stream. */
  			break;
  		default:
  			archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
  			    "zisofs decompression failed (%d)", r);
  			return (ARCHIVE_FATAL);
  		}
  		uncompressed_size =
  		    zisofs->uncompressed_buffer_size - zisofs->stream.avail_out;
  		avail -= zisofs->stream.next_in - p;
  		zisofs->block_avail -= (uint32_t)(zisofs->stream.next_in - p);
  	}
  next_data:
  	bytes_read -= avail;
  	*buff = zisofs->uncompressed_buffer;
  	*size = uncompressed_size;
  	*offset = iso9660->entry_sparse_offset;
  	iso9660->entry_sparse_offset += uncompressed_size;
  	iso9660->entry_bytes_remaining -= bytes_read;
  	iso9660->current_position += bytes_read;
  	zisofs->pz_offset += (uint32_t)bytes_read;
  	iso9660->entry_bytes_unconsumed += bytes_read;
  
  	return (ARCHIVE_OK);
  }
  
  #else /* HAVE_ZLIB_H */
  
  static int
  zisofs_read_data(struct archive_read *a,
      const void **buff, size_t *size, int64_t *offset)
  {
  
  	(void)buff;/* UNUSED */
  	(void)size;/* UNUSED */
  	(void)offset;/* UNUSED */
  	archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
  	    "zisofs is not supported on this platform.");
  	return (ARCHIVE_FAILED);
  }
  
  #endif /* HAVE_ZLIB_H */
  
  static int
  archive_read_format_iso9660_read_data(struct archive_read *a,
      const void **buff, size_t *size, int64_t *offset)
  {
  	ssize_t bytes_read;
  	struct iso9660 *iso9660;
  
  	iso9660 = (struct iso9660 *)(a->format->data);
  
  	if (iso9660->entry_bytes_unconsumed) {
  		__archive_read_consume(a, iso9660->entry_bytes_unconsumed);
  		iso9660->entry_bytes_unconsumed = 0;
  	}
  
  	if (iso9660->entry_bytes_remaining <= 0) {
  		if (iso9660->entry_content != NULL)
  			iso9660->entry_content = iso9660->entry_content->next;
  		if (iso9660->entry_content == NULL) {
  			*buff = NULL;
  			*size = 0;
  			*offset = iso9660->entry_sparse_offset;
  			return (ARCHIVE_EOF);
  		}
  		/* Seek forward to the start of the entry. */
  		if (iso9660->current_position < iso9660->entry_content->offset) {
  			int64_t step;
  
  			step = iso9660->entry_content->offset -
  			    iso9660->current_position;
  			step = __archive_read_consume(a, step);
  			if (step < 0)
  				return ((int)step);
  			iso9660->current_position =
  			    iso9660->entry_content->offset;
  		}
  		if (iso9660->entry_content->offset < iso9660->current_position) {
  			archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
  			    "Ignoring out-of-order file (%s) %jd < %jd",
  			    iso9660->pathname.s,
  			    (intmax_t)iso9660->entry_content->offset,
  			    (intmax_t)iso9660->current_position);
  			*buff = NULL;
  			*size = 0;
  			*offset = iso9660->entry_sparse_offset;
  			return (ARCHIVE_WARN);
  		}
  		iso9660->entry_bytes_remaining = iso9660->entry_content->size;
  	}
  	if (iso9660->entry_zisofs.pz)
  		return (zisofs_read_data(a, buff, size, offset));
  
  	*buff = __archive_read_ahead(a, 1, &bytes_read);
  	if (bytes_read == 0)
  		archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
  		    "Truncated input file");
  	if (*buff == NULL)
  		return (ARCHIVE_FATAL);
  	if (bytes_read > iso9660->entry_bytes_remaining)
  		bytes_read = (ssize_t)iso9660->entry_bytes_remaining;
  	*size = bytes_read;
  	*offset = iso9660->entry_sparse_offset;
  	iso9660->entry_sparse_offset += bytes_read;
  	iso9660->entry_bytes_remaining -= bytes_read;
  	iso9660->entry_bytes_unconsumed = bytes_read;
  	iso9660->current_position += bytes_read;
  	return (ARCHIVE_OK);
  }
  
  static int
  archive_read_format_iso9660_cleanup(struct archive_read *a)
  {
  	struct iso9660 *iso9660;
  	int r = ARCHIVE_OK;
  
  	iso9660 = (struct iso9660 *)(a->format->data);
  	release_files(iso9660);
  	free(iso9660->read_ce_req.reqs);
  	archive_string_free(&iso9660->pathname);
  	archive_string_free(&iso9660->previous_pathname);
  	if (iso9660->pending_files.files)
  		free(iso9660->pending_files.files);
  #ifdef HAVE_ZLIB_H
  	free(iso9660->entry_zisofs.uncompressed_buffer);
  	free(iso9660->entry_zisofs.block_pointers);
  	if (iso9660->entry_zisofs.stream_valid) {
  		if (inflateEnd(&iso9660->entry_zisofs.stream) != Z_OK) {
  			archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
  			    "Failed to clean up zlib decompressor");
  			r = ARCHIVE_FATAL;
  		}
  	}
  #endif
  	free(iso9660->utf16be_path);
  	free(iso9660->utf16be_previous_path);
  	free(iso9660);
  	(a->format->data) = NULL;
  	return (r);
  }
  
  /*
   * This routine parses a single ISO directory record, makes sense
   * of any extensions, and stores the result in memory.
   */
  static struct file_info *
  parse_file_info(struct archive_read *a, struct file_info *parent,
      const unsigned char *isodirrec)
  {
  	struct iso9660 *iso9660;
  	struct file_info *file, *filep;
  	size_t name_len;
  	const unsigned char *rr_start, *rr_end;
  	const unsigned char *p;
  	size_t dr_len;
  	uint64_t fsize, offset;
  	int32_t location;
  	int flags;
  
  	iso9660 = (struct iso9660 *)(a->format->data);
  
  	dr_len = (size_t)isodirrec[DR_length_offset];
  	name_len = (size_t)isodirrec[DR_name_len_offset];
  	location = archive_le32dec(isodirrec + DR_extent_offset);
  	fsize = toi(isodirrec + DR_size_offset, DR_size_size);
  	/* Sanity check that dr_len needs at least 34. */
  	if (dr_len < 34) {
  		archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
  		    "Invalid length of directory record");
  		return (NULL);
  	}
  	/* Sanity check that name_len doesn't exceed dr_len. */
  	if (dr_len - 33 < name_len || name_len == 0) {
  		archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
  		    "Invalid length of file identifier");
  		return (NULL);
  	}
  	/* Sanity check that location doesn't exceed volume block.
  	 * Don't check lower limit of location; it's possibility
  	 * the location has negative value when file type is symbolic
  	 * link or file size is zero. As far as I know latest mkisofs
  	 * do that.
  	 */
  	if (location > 0 &&
  	    (location + ((fsize + iso9660->logical_block_size -1)
  	       / iso9660->logical_block_size))
  			> (uint32_t)iso9660->volume_block) {
  		archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
  		    "Invalid location of extent of file");
  		return (NULL);
  	}
  	/* Sanity check that location doesn't have a negative value
  	 * when the file is not empty. it's too large. */
  	if (fsize != 0 && location < 0) {
  		archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
  		    "Invalid location of extent of file");
  		return (NULL);
  	}
  
  	/* Sanity check that this entry does not create a cycle. */
  	offset = iso9660->logical_block_size * (uint64_t)location;
  	for (filep = parent; filep != NULL; filep = filep->parent) {
  		if (filep->offset == offset) {
  			archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
  			    "Directory structure contains loop");
  			return (NULL);
  		}
  	}
  
  	/* Create a new file entry and copy data from the ISO dir record. */
  	file = (struct file_info *)calloc(1, sizeof(*file));
  	if (file == NULL) {
  		archive_set_error(&a->archive, ENOMEM,
  		    "No memory for file entry");
  		return (NULL);
  	}
  	file->parent = parent;
  	file->offset = offset;
  	file->size = fsize;
  	file->mtime = isodate7(isodirrec + DR_date_offset);
  	file->ctime = file->atime = file->mtime;
  	file->rede_files.first = NULL;
  	file->rede_files.last = &(file->rede_files.first);
  
  	p = isodirrec + DR_name_offset;
  	/* Rockridge extensions (if any) follow name.  Compute this
  	 * before fidgeting the name_len below. */
  	rr_start = p + name_len + (name_len & 1 ? 0 : 1);
  	rr_end = isodirrec + dr_len;
  
  	if (iso9660->seenJoliet) {
  		/* Joliet names are max 64 chars (128 bytes) according to spec,
  		 * but genisoimage/mkisofs allows recording longer Joliet
  		 * names which are 103 UCS2 characters(206 bytes) by their
  		 * option '-joliet-long'.
  		 */
  		if (name_len > 206)
  			name_len = 206;
  		name_len &= ~1;
  
  		/* trim trailing first version and dot from filename.
  		 *
  		 * Remember we were in UTF-16BE land!
  		 * SEPARATOR 1 (.) and SEPARATOR 2 (;) are both
  		 * 16 bits big endian characters on Joliet.
  		 *
  		 * TODO: sanitize filename?
  		 *       Joliet allows any UCS-2 char except:
  		 *       *, /, :, ;, ? and \.
  		 */
  		/* Chop off trailing ';1' from files. */
  		if (name_len > 4 && p[name_len-4] == 0 && p[name_len-3] == ';'
  		    && p[name_len-2] == 0 && p[name_len-1] == '1')
  			name_len -= 4;
  #if 0 /* XXX: this somehow manages to strip of single-character file extensions, like '.c'. */
  		/* Chop off trailing '.' from filenames. */
  		if (name_len > 2 && p[name_len-2] == 0 && p[name_len-1] == '.')
  			name_len -= 2;
  #endif
  		if ((file->utf16be_name = malloc(name_len)) == NULL) {
  			archive_set_error(&a->archive, ENOMEM,
  			    "No memory for file name");
  			goto fail;
  		}
  		memcpy(file->utf16be_name, p, name_len);
  		file->utf16be_bytes = name_len;
  	} else {
  		/* Chop off trailing ';1' from files. */
  		if (name_len > 2 && p[name_len - 2] == ';' &&
  				p[name_len - 1] == '1')
  			name_len -= 2;
  		/* Chop off trailing '.' from filenames. */
  		if (name_len > 1 && p[name_len - 1] == '.')
  			--name_len;
  
  		archive_strncpy(&file->name, (const char *)p, name_len);
  	}
  
  	flags = isodirrec[DR_flags_offset];
  	if (flags & 0x02)
  		file->mode = AE_IFDIR | 0700;
  	else
  		file->mode = AE_IFREG | 0400;
  	if (flags & 0x80)
  		file->multi_extent = 1;
  	else
  		file->multi_extent = 0;
  	/*
  	 * Use a location for the file number, which is treated as an inode
  	 * number to find out hardlink target. If Rockridge extensions is
  	 * being used, the file number will be overwritten by FILE SERIAL
  	 * NUMBER of RRIP "PX" extension.
  	 * Note: Old mkisofs did not record that FILE SERIAL NUMBER
  	 * in ISO images.
  	 * Note2: xorriso set 0 to the location of a symlink file. 
  	 */
  	if (file->size == 0 && location >= 0) {
  		/* If file->size is zero, its location points wrong place,
  		 * and so we should not use it for the file number.
  		 * When the location has negative value, it can be used
  		 * for the file number.
  		 */
  		file->number = -1;
  		/* Do not appear before any directory entries. */
  		file->offset = -1;
  	} else
  		file->number = (int64_t)(uint32_t)location;
  
  	/* Rockridge extensions overwrite information from above. */
  	if (iso9660->opt_support_rockridge) {
  		if (parent == NULL && rr_end - rr_start >= 7) {
  			p = rr_start;
  			if (memcmp(p, "SP\x07\x01\xbe\xef", 6) == 0) {
  				/*
  				 * SP extension stores the suspOffset
  				 * (Number of bytes to skip between
  				 * filename and SUSP records.)
  				 * It is mandatory by the SUSP standard
  				 * (IEEE 1281).
  				 *
  				 * It allows SUSP to coexist with
  				 * non-SUSP uses of the System
  				 * Use Area by placing non-SUSP data
  				 * before SUSP data.
  				 *
  				 * SP extension must be in the root
  				 * directory entry, disable all SUSP
  				 * processing if not found.
  				 */
  				iso9660->suspOffset = p[6];
  				iso9660->seenSUSP = 1;
  				rr_start += 7;
  			}
  		}
  		if (iso9660->seenSUSP) {
  			int r;
  
  			file->name_continues = 0;
  			file->symlink_continues = 0;
  			rr_start += iso9660->suspOffset;
  			r = parse_rockridge(a, file, rr_start, rr_end);
  			if (r != ARCHIVE_OK)
  				goto fail;
  			/*
  			 * A file size of symbolic link files in ISO images
  			 * made by makefs is not zero and its location is
  			 * the same as those of next regular file. That is
  			 * the same as hard like file and it causes unexpected
  			 * error. 
  			 */
  			if (file->size > 0 &&
  			    (file->mode & AE_IFMT) == AE_IFLNK) {
  				file->size = 0;
  				file->number = -1;
  				file->offset = -1;
  			}
  		} else
  			/* If there isn't SUSP, disable parsing
  			 * rock ridge extensions. */
  			iso9660->opt_support_rockridge = 0;
  	}
  
  	file->nlinks = 1;/* Reset nlink. we'll calculate it later. */
  	/* Tell file's parent how many children that parent has. */
  	if (parent != NULL && (flags & 0x02))
  		parent->subdirs++;
  
  	if (iso9660->seenRockridge) {
  		if (parent != NULL && parent->parent == NULL &&
  		    (flags & 0x02) && iso9660->rr_moved == NULL &&
  		    file->name.s &&
  		    (strcmp(file->name.s, "rr_moved") == 0 ||
  		     strcmp(file->name.s, ".rr_moved") == 0)) {
  			iso9660->rr_moved = file;
  			file->rr_moved = 1;
  			file->rr_moved_has_re_only = 1;
  			file->re = 0;
  			parent->subdirs--;
  		} else if (file->re) {
  			/*
  			 * Sanity check: file's parent is rr_moved.
  			 */
  			if (parent == NULL || parent->rr_moved == 0) {
  				archive_set_error(&a->archive,
  				    ARCHIVE_ERRNO_MISC,
  				    "Invalid Rockridge RE");
  				goto fail;
  			}
  			/*
  			 * Sanity check: file does not have "CL" extension.
  			 */
  			if (file->cl_offset) {
  				archive_set_error(&a->archive,
  				    ARCHIVE_ERRNO_MISC,
  				    "Invalid Rockridge RE and CL");
  				goto fail;
  			}
  			/*
  			 * Sanity check: The file type must be a directory.
  			 */
  			if ((flags & 0x02) == 0) {
  				archive_set_error(&a->archive,
  				    ARCHIVE_ERRNO_MISC,
  				    "Invalid Rockridge RE");
  				goto fail;
  			}
  		} else if (parent != NULL && parent->rr_moved)
  			file->rr_moved_has_re_only = 0;
  		else if (parent != NULL && (flags & 0x02) &&
  		    (parent->re || parent->re_descendant))
  			file->re_descendant = 1;
  		if (file->cl_offset) {
  			struct file_info *r;
  
  			if (parent == NULL || parent->parent == NULL) {
  				archive_set_error(&a->archive,
  				    ARCHIVE_ERRNO_MISC,
  				    "Invalid Rockridge CL");
  				goto fail;
  			}
  			/*
  			 * Sanity check: The file type must be a regular file.
  			 */
  			if ((flags & 0x02) != 0) {
  				archive_set_error(&a->archive,
  				    ARCHIVE_ERRNO_MISC,
  				    "Invalid Rockridge CL");
  				goto fail;
  			}
  			parent->subdirs++;
  			/* Overwrite an offset and a number of this "CL" entry
  			 * to appear before other dirs. "+1" to those is to
  			 * make sure to appear after "RE" entry which this
  			 * "CL" entry should be connected with. */
  			file->offset = file->number = file->cl_offset + 1;
  
  			/*
  			 * Sanity check: cl_offset does not point at its
  			 * the parents or itself.
  			 */
  			for (r = parent; r; r = r->parent) {
  				if (r->offset == file->cl_offset) {
  					archive_set_error(&a->archive,
  					    ARCHIVE_ERRNO_MISC,
  					    "Invalid Rockridge CL");
  					goto fail;
  				}
  			}
  			if (file->cl_offset == file->offset ||
  			    parent->rr_moved) {
  				archive_set_error(&a->archive,
  				    ARCHIVE_ERRNO_MISC,
  				    "Invalid Rockridge CL");
  				goto fail;
  			}
  		}
  	}
  
  #if DEBUG
  	/* DEBUGGING: Warn about attributes I don't yet fully support. */
  	if ((flags & ~0x02) != 0) {
  		fprintf(stderr, "\n ** Unrecognized flag: ");
  		dump_isodirrec(stderr, isodirrec);
  		fprintf(stderr, "\n");
  	} else if (toi(isodirrec + DR_volume_sequence_number_offset, 2) != 1) {
  		fprintf(stderr, "\n ** Unrecognized sequence number: ");
  		dump_isodirrec(stderr, isodirrec);
  		fprintf(stderr, "\n");
  	} else if (*(isodirrec + DR_file_unit_size_offset) != 0) {
  		fprintf(stderr, "\n ** Unexpected file unit size: ");
  		dump_isodirrec(stderr, isodirrec);
  		fprintf(stderr, "\n");
  	} else if (*(isodirrec + DR_interleave_offset) != 0) {
  		fprintf(stderr, "\n ** Unexpected interleave: ");
  		dump_isodirrec(stderr, isodirrec);
  		fprintf(stderr, "\n");
  	} else if (*(isodirrec + DR_ext_attr_length_offset) != 0) {
  		fprintf(stderr, "\n ** Unexpected extended attribute length: ");
  		dump_isodirrec(stderr, isodirrec);
  		fprintf(stderr, "\n");
  	}
  #endif
  	register_file(iso9660, file);
  	return (file);
  fail:
  	archive_string_free(&file->name);
  	free(file);
  	return (NULL);
  }
  
  static int
  parse_rockridge(struct archive_read *a, struct file_info *file,
      const unsigned char *p, const unsigned char *end)
  {
  	struct iso9660 *iso9660;
  
  	iso9660 = (struct iso9660 *)(a->format->data);
  
  	while (p + 4 <= end  /* Enough space for another entry. */
  	    && p[0] >= 'A' && p[0] <= 'Z' /* Sanity-check 1st char of name. */
  	    && p[1] >= 'A' && p[1] <= 'Z' /* Sanity-check 2nd char of name. */
  	    && p[2] >= 4 /* Sanity-check length. */
  	    && p + p[2] <= end) { /* Sanity-check length. */
  		const unsigned char *data = p + 4;
  		int data_length = p[2] - 4;
  		int version = p[3];
  
  		switch(p[0]) {
  		case 'C':
  			if (p[1] == 'E') {
  				if (version == 1 && data_length == 24) {
  					/*
  					 * CE extension comprises:
  					 *   8 byte sector containing extension
  					 *   8 byte offset w/in above sector
  					 *   8 byte length of continuation
  					 */
  					int32_t location =
  					    archive_le32dec(data);
  					file->ce_offset =
  					    archive_le32dec(data+8);
  					file->ce_size =
  					    archive_le32dec(data+16);
  					if (register_CE(a, location, file)
  					    != ARCHIVE_OK)
  						return (ARCHIVE_FATAL);
  				}
  			}
  			else if (p[1] == 'L') {
  				if (version == 1 && data_length == 8) {
  					file->cl_offset = (uint64_t)
  					    iso9660->logical_block_size *
  					    (uint64_t)archive_le32dec(data);
  					iso9660->seenRockridge = 1;
  				}
  			}
  			break;
  		case 'N':
  			if (p[1] == 'M') {
  				if (version == 1) {
  					parse_rockridge_NM1(file,
  					    data, data_length);
  					iso9660->seenRockridge = 1;
  				}
  			}
  			break;
  		case 'P':
  			/*
  			 * PD extension is padding;
  			 * contents are always ignored.
  			 *
  			 * PL extension won't appear;
  			 * contents are always ignored.
  			 */
  			if (p[1] == 'N') {
  				if (version == 1 && data_length == 16) {
  					file->rdev = toi(data,4);
  					file->rdev <<= 32;
  					file->rdev |= toi(data + 8, 4);
  					iso9660->seenRockridge = 1;
  				}
  			}
  			else if (p[1] == 'X') {
  				/*
  				 * PX extension comprises:
  				 *   8 bytes for mode,
  				 *   8 bytes for nlinks,
  				 *   8 bytes for uid,
  				 *   8 bytes for gid,
  				 *   8 bytes for inode.
  				 */
  				if (version == 1) {
  					if (data_length >= 8)
  						file->mode
  						    = toi(data, 4);
  					if (data_length >= 16)
  						file->nlinks
  						    = toi(data + 8, 4);
  					if (data_length >= 24)
  						file->uid
  						    = toi(data + 16, 4);
  					if (data_length >= 32)
  						file->gid
  						    = toi(data + 24, 4);
  					if (data_length >= 40)
  						file->number
  						    = toi(data + 32, 4);
  					iso9660->seenRockridge = 1;
  				}
  			}
  			break;
  		case 'R':
  			if (p[1] == 'E' && version == 1) {
  				file->re = 1;
  				iso9660->seenRockridge = 1;
  			}
  			else if (p[1] == 'R' && version == 1) {
  				/*
  				 * RR extension comprises:
  				 *    one byte flag value
  				 * This extension is obsolete,
  				 * so contents are always ignored.
  				 */
  			}
  			break;
  		case 'S':
  			if (p[1] == 'L') {
  				if (version == 1) {
  					parse_rockridge_SL1(file,
  					    data, data_length);
  					iso9660->seenRockridge = 1;
  				}
  			}
  			else if (p[1] == 'T'
  			    && data_length == 0 && version == 1) {
  				/*
  				 * ST extension marks end of this
  				 * block of SUSP entries.
  				 *
  				 * It allows SUSP to coexist with
  				 * non-SUSP uses of the System
  				 * Use Area by placing non-SUSP data
  				 * after SUSP data.
  				 */
  				iso9660->seenSUSP = 0;
  				iso9660->seenRockridge = 0;
  				return (ARCHIVE_OK);
  			}
  			break;
  		case 'T':
  			if (p[1] == 'F') {
  				if (version == 1) {
  					parse_rockridge_TF1(file,
  					    data, data_length);
  					iso9660->seenRockridge = 1;
  				}
  			}
  			break;
  		case 'Z':
  			if (p[1] == 'F') {
  				if (version == 1)
  					parse_rockridge_ZF1(file,
  					    data, data_length);
  			}
  			break;
  		default:
  			break;
  		}
  
  		p += p[2];
  	}
  	return (ARCHIVE_OK);
  }
  
  static int
  register_CE(struct archive_read *a, int32_t location,
      struct file_info *file)
  {
  	struct iso9660 *iso9660;
  	struct read_ce_queue *heap;
  	struct read_ce_req *p;
  	uint64_t offset, parent_offset;
  	int hole, parent;
  
  	iso9660 = (struct iso9660 *)(a->format->data);
  	offset = ((uint64_t)location) * (uint64_t)iso9660->logical_block_size;
  	if (((file->mode & AE_IFMT) == AE_IFREG &&
  	    offset >= file->offset) ||
  	    offset < iso9660->current_position ||
  	    (((uint64_t)file->ce_offset) + file->ce_size)
  	      > (uint64_t)iso9660->logical_block_size ||
  	    offset + file->ce_offset + file->ce_size
  		  > iso9660->volume_size) {
  		archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
  		    "Invalid parameter in SUSP \"CE\" extension");
  		return (ARCHIVE_FATAL);
  	}
  
  	/* Expand our CE list as necessary. */
  	heap = &(iso9660->read_ce_req);
  	if (heap->cnt >= heap->allocated) {
  		int new_size;
  
  		if (heap->allocated < 16)
  			new_size = 16;
  		else
  			new_size = heap->allocated * 2;
  		/* Overflow might keep us from growing the list. */
  		if (new_size <= heap->allocated) {
  			archive_set_error(&a->archive, ENOMEM, "Out of memory");
  			return (ARCHIVE_FATAL);
  		}
  		p = calloc(new_size, sizeof(p[0]));
  		if (p == NULL) {
  			archive_set_error(&a->archive, ENOMEM, "Out of memory");
  			return (ARCHIVE_FATAL);
  		}
  		if (heap->reqs != NULL) {
  			memcpy(p, heap->reqs, heap->cnt * sizeof(*p));
  			free(heap->reqs);
  		}
  		heap->reqs = p;
  		heap->allocated = new_size;
  	}
  
  	/*
  	 * Start with hole at end, walk it up tree to find insertion point.
  	 */
  	hole = heap->cnt++;
  	while (hole > 0) {
  		parent = (hole - 1)/2;
  		parent_offset = heap->reqs[parent].offset;
  		if (offset >= parent_offset) {
  			heap->reqs[hole].offset = offset;
  			heap->reqs[hole].file = file;
  			return (ARCHIVE_OK);
  		}
  		/* Move parent into hole <==> move hole up tree. */
  		heap->reqs[hole] = heap->reqs[parent];
  		hole = parent;
  	}
  	heap->reqs[0].offset = offset;
  	heap->reqs[0].file = file;
  	return (ARCHIVE_OK);
  }
  
  static void
  next_CE(struct read_ce_queue *heap)
  {
  	uint64_t a_offset, b_offset, c_offset;
  	int a, b, c;
  	struct read_ce_req tmp;
  
  	if (heap->cnt < 1)
  		return;
  
  	/*
  	 * Move the last item in the heap to the root of the tree
  	 */
  	heap->reqs[0] = heap->reqs[--(heap->cnt)];
  
  	/*
  	 * Rebalance the heap.
  	 */
  	a = 0; /* Starting element and its offset */
  	a_offset = heap->reqs[a].offset;
  	for (;;) {
  		b = a + a + 1; /* First child */
  		if (b >= heap->cnt)
  			return;
  		b_offset = heap->reqs[b].offset;
  		c = b + 1; /* Use second child if it is smaller. */
  		if (c < heap->cnt) {
  			c_offset = heap->reqs[c].offset;
  			if (c_offset < b_offset) {
  				b = c;
  				b_offset = c_offset;
  			}
  		}
  		if (a_offset <= b_offset)
  			return;
  		tmp = heap->reqs[a];
  		heap->reqs[a] = heap->reqs[b];
  		heap->reqs[b] = tmp;
  		a = b;
  	}
  }
  
  
  static int
  read_CE(struct archive_read *a, struct iso9660 *iso9660)
  {
  	struct read_ce_queue *heap;
  	const unsigned char *b, *p, *end;
  	struct file_info *file;
  	size_t step;
  	int r;
  
  	/* Read data which RRIP "CE" extension points. */
  	heap = &(iso9660->read_ce_req);
  	step = iso9660->logical_block_size;
  	while (heap->cnt &&
  	    heap->reqs[0].offset == iso9660->current_position) {
  		b = __archive_read_ahead(a, step, NULL);
  		if (b == NULL) {
  			archive_set_error(&a->archive,
  			    ARCHIVE_ERRNO_MISC,
  			    "Failed to read full block when scanning "
  			    "ISO9660 directory list");
  			return (ARCHIVE_FATAL);
  		}
  		do {
  			file = heap->reqs[0].file;
  			if (file->ce_offset + file->ce_size > step) {
  				archive_set_error(&a->archive,
  				    ARCHIVE_ERRNO_FILE_FORMAT,
  				    "Malformed CE information");
  				return (ARCHIVE_FATAL);
  			}
  			p = b + file->ce_offset;
  			end = p + file->ce_size;
  			next_CE(heap);
  			r = parse_rockridge(a, file, p, end);
  			if (r != ARCHIVE_OK)
  				return (ARCHIVE_FATAL);
  		} while (heap->cnt &&
  		    heap->reqs[0].offset == iso9660->current_position);
  		/* NOTE: Do not move this consume's code to front of
  		 * do-while loop. Registration of nested CE extension
  		 * might cause error because of current position. */
  		__archive_read_consume(a, step);
  		iso9660->current_position += step;
  	}
  	return (ARCHIVE_OK);
  }
  
  static void
  parse_rockridge_NM1(struct file_info *file,
  		    const unsigned char *data, int data_length)
  {
  	if (!file->name_continues)
  		archive_string_empty(&file->name);
  	file->name_continues = 0;
  	if (data_length < 1)
  		return;
  	/*
  	 * NM version 1 extension comprises:
  	 *   1 byte flag, value is one of:
  	 *     = 0: remainder is name
  	 *     = 1: remainder is name, next NM entry continues name
  	 *     = 2: "."
  	 *     = 4: ".."
  	 *     = 32: Implementation specific
  	 *     All other values are reserved.
  	 */
  	switch(data[0]) {
  	case 0:
  		if (data_length < 2)
  			return;
  		archive_strncat(&file->name,
  		    (const char *)data + 1, data_length - 1);
  		break;
  	case 1:
  		if (data_length < 2)
  			return;
  		archive_strncat(&file->name,
  		    (const char *)data + 1, data_length - 1);
  		file->name_continues = 1;
  		break;
  	case 2:
  		archive_strcat(&file->name, ".");
  		break;
  	case 4:
  		archive_strcat(&file->name, "..");
  		break;
  	default:
  		return;
  	}
  
  }
  
  static void
  parse_rockridge_TF1(struct file_info *file, const unsigned char *data,
      int data_length)
  {
  	char flag;
  	/*
  	 * TF extension comprises:
  	 *   one byte flag
  	 *   create time (optional)
  	 *   modify time (optional)
  	 *   access time (optional)
  	 *   attribute time (optional)
  	 *  Time format and presence of fields
  	 *  is controlled by flag bits.
  	 */
  	if (data_length < 1)
  		return;
  	flag = data[0];
  	++data;
  	--data_length;
  	if (flag & 0x80) {
  		/* Use 17-byte time format. */
  		if ((flag & 1) && data_length >= 17) {
  			/* Create time. */
  			file->birthtime_is_set = 1;
  			file->birthtime = isodate17(data);
  			data += 17;
  			data_length -= 17;
  		}
  		if ((flag & 2) && data_length >= 17) {
  			/* Modify time. */
  			file->mtime = isodate17(data);
  			data += 17;
  			data_length -= 17;
  		}
  		if ((flag & 4) && data_length >= 17) {
  			/* Access time. */
  			file->atime = isodate17(data);
  			data += 17;
  			data_length -= 17;
  		}
  		if ((flag & 8) && data_length >= 17) {
  			/* Attribute change time. */
  			file->ctime = isodate17(data);
  		}
  	} else {
  		/* Use 7-byte time format. */
  		if ((flag & 1) && data_length >= 7) {
  			/* Create time. */
  			file->birthtime_is_set = 1;
  			file->birthtime = isodate7(data);
  			data += 7;
  			data_length -= 7;
  		}
  		if ((flag & 2) && data_length >= 7) {
  			/* Modify time. */
  			file->mtime = isodate7(data);
  			data += 7;
  			data_length -= 7;
  		}
  		if ((flag & 4) && data_length >= 7) {
  			/* Access time. */
  			file->atime = isodate7(data);
  			data += 7;
  			data_length -= 7;
  		}
  		if ((flag & 8) && data_length >= 7) {
  			/* Attribute change time. */
  			file->ctime = isodate7(data);
  		}
  	}
  }
  
  static void
  parse_rockridge_SL1(struct file_info *file, const unsigned char *data,
      int data_length)
  {
  	const char *separator = "";
  
  	if (!file->symlink_continues || file->symlink.length < 1)
  		archive_string_empty(&file->symlink);
  	file->symlink_continues = 0;
  
  	/*
  	 * Defined flag values:
  	 *  0: This is the last SL record for this symbolic link
  	 *  1: this symbolic link field continues in next SL entry
  	 *  All other values are reserved.
  	 */
  	if (data_length < 1)
  		return;
  	switch(*data) {
  	case 0:
  		break;
  	case 1:
  		file->symlink_continues = 1;
  		break;
  	default:
  		return;
  	}
  	++data;  /* Skip flag byte. */
  	--data_length;
  
  	/*
  	 * SL extension body stores "components".
  	 * Basically, this is a complicated way of storing
  	 * a POSIX path.  It also interferes with using
  	 * symlinks for storing non-path data. <sigh>
  	 *
  	 * Each component is 2 bytes (flag and length)
  	 * possibly followed by name data.
  	 */
  	while (data_length >= 2) {
  		unsigned char flag = *data++;
  		unsigned char nlen = *data++;
  		data_length -= 2;
  
  		archive_strcat(&file->symlink, separator);
  		separator = "/";
  
  		switch(flag) {
  		case 0: /* Usual case, this is text. */
  			if (data_length < nlen)
  				return;
  			archive_strncat(&file->symlink,
  			    (const char *)data, nlen);
  			break;
  		case 0x01: /* Text continues in next component. */
  			if (data_length < nlen)
  				return;
  			archive_strncat(&file->symlink,
  			    (const char *)data, nlen);
  			separator = "";
  			break;
  		case 0x02: /* Current dir. */
  			archive_strcat(&file->symlink, ".");
  			break;
  		case 0x04: /* Parent dir. */
  			archive_strcat(&file->symlink, "..");
  			break;
  		case 0x08: /* Root of filesystem. */
  			archive_strcat(&file->symlink, "/");
  			separator = "";
  			break;
  		case 0x10: /* Undefined (historically "volume root" */
  			archive_string_empty(&file->symlink);
  			archive_strcat(&file->symlink, "ROOT");
  			break;
  		case 0x20: /* Undefined (historically "hostname") */
  			archive_strcat(&file->symlink, "hostname");
  			break;
  		default:
  			/* TODO: issue a warning ? */
  			return;
  		}
  		data += nlen;
  		data_length -= nlen;
  	}
  }
  
  static void
  parse_rockridge_ZF1(struct file_info *file, const unsigned char *data,
      int data_length)
  {
  
  	if (data[0] == 0x70 && data[1] == 0x7a && data_length == 12) {
  		/* paged zlib */
  		file->pz = 1;
  		file->pz_log2_bs = data[3];
  		file->pz_uncompressed_size = archive_le32dec(&data[4]);
  	}
  }
  
  static void
  register_file(struct iso9660 *iso9660, struct file_info *file)
  {
  
  	file->use_next = iso9660->use_files;
  	iso9660->use_files = file;
  }
  
  static void
  release_files(struct iso9660 *iso9660)
  {
  	struct content *con, *connext;
  	struct file_info *file;
  
  	file = iso9660->use_files;
  	while (file != NULL) {
  		struct file_info *next = file->use_next;
  
  		archive_string_free(&file->name);
  		archive_string_free(&file->symlink);
  		free(file->utf16be_name);
  		con = file->contents.first;
  		while (con != NULL) {
  			connext = con->next;
  			free(con);
  			con = connext;
  		}
  		free(file);
  		file = next;
  	}
  }
  
  static int
  next_entry_seek(struct archive_read *a, struct iso9660 *iso9660,
      struct file_info **pfile)
  {
  	struct file_info *file;
  	int r;
  
  	r = next_cache_entry(a, iso9660, pfile);
  	if (r != ARCHIVE_OK)
  		return (r);
  	file = *pfile;
  
  	/* Don't waste time seeking for zero-length bodies. */
  	if (file->size == 0)
  		file->offset = iso9660->current_position;
  
  	/* flush any remaining bytes from the last round to ensure
  	 * we're positioned */
  	if (iso9660->entry_bytes_unconsumed) {
  		__archive_read_consume(a, iso9660->entry_bytes_unconsumed);
  		iso9660->entry_bytes_unconsumed = 0;
  	}
  
  	/* Seek forward to the start of the entry. */
  	if (iso9660->current_position < file->offset) {
  		int64_t step;
  
  		step = file->offset - iso9660->current_position;
  		step = __archive_read_consume(a, step);
  		if (step < 0)
  			return ((int)step);
  		iso9660->current_position = file->offset;
  	}
  
  	/* We found body of file; handle it now. */
  	return (ARCHIVE_OK);
  }
  
  static int
  next_cache_entry(struct archive_read *a, struct iso9660 *iso9660,
      struct file_info **pfile)
  {
  	struct file_info *file;
  	struct {
  		struct file_info	*first;
  		struct file_info	**last;
  	}	empty_files;
  	int64_t number;
  	int count;
  
  	file = cache_get_entry(iso9660);
  	if (file != NULL) {
  		*pfile = file;
  		return (ARCHIVE_OK);
  	}
  
  	for (;;) {
  		struct file_info *re, *d;
  
  		*pfile = file = next_entry(iso9660);
  		if (file == NULL) {
  			/*
  			 * If directory entries all which are descendant of
  			 * rr_moved are still remaining, expose their.
  			 */
  			if (iso9660->re_files.first != NULL && 
  			    iso9660->rr_moved != NULL &&
  			    iso9660->rr_moved->rr_moved_has_re_only)
  				/* Expose "rr_moved" entry. */
  				cache_add_entry(iso9660, iso9660->rr_moved);
  			while ((re = re_get_entry(iso9660)) != NULL) {
  				/* Expose its descendant dirs. */
  				while ((d = rede_get_entry(re)) != NULL)
  					cache_add_entry(iso9660, d);
  			}
  			if (iso9660->cache_files.first != NULL)
  				return (next_cache_entry(a, iso9660, pfile));
  			return (ARCHIVE_EOF);
  		}
  
  		if (file->cl_offset) {
  			struct file_info *first_re = NULL;
  			int nexted_re = 0;
  
  			/*
  			 * Find "RE" dir for the current file, which
  			 * has "CL" flag.
  			 */
  			while ((re = re_get_entry(iso9660))
  			    != first_re) {
  				if (first_re == NULL)
  					first_re = re;
  				if (re->offset == file->cl_offset) {
  					re->parent->subdirs--;
  					re->parent = file->parent;
  					re->re = 0;
  					if (re->parent->re_descendant) {
  						nexted_re = 1;
  						re->re_descendant = 1;
  						if (rede_add_entry(re) < 0)
  							goto fatal_rr;
  						/* Move a list of descendants
  						 * to a new ancestor. */
  						while ((d = rede_get_entry(
  						    re)) != NULL)
  							if (rede_add_entry(d)
  							    < 0)
  								goto fatal_rr;
  						break;
  					}
  					/* Replace the current file
  					 * with "RE" dir */
  					*pfile = file = re;
  					/* Expose its descendant */
  					while ((d = rede_get_entry(
  					    file)) != NULL)
  						cache_add_entry(
  						    iso9660, d);
  					break;
  				} else
  					re_add_entry(iso9660, re);
  			}
  			if (nexted_re) {
  				/*
  				 * Do not expose this at this time
  				 * because we have not gotten its full-path
  				 * name yet.
  				 */
  				continue;
  			}
  		} else if ((file->mode & AE_IFMT) == AE_IFDIR) {
  			int r;
  
  			/* Read file entries in this dir. */
  			r = read_children(a, file);
  			if (r != ARCHIVE_OK)
  				return (r);
  
  			/*
  			 * Handle a special dir of Rockridge extensions,
  			 * "rr_moved".
  			 */
  			if (file->rr_moved) {
  				/*
  				 * If this has only the subdirectories which
  				 * have "RE" flags, do not expose at this time.
  				 */
  				if (file->rr_moved_has_re_only)
  					continue;
  				/* Otherwise expose "rr_moved" entry. */
  			} else if (file->re) {
  				/*
  				 * Do not expose this at this time
  				 * because we have not gotten its full-path
  				 * name yet.
  				 */
  				re_add_entry(iso9660, file);
  				continue;
  			} else if (file->re_descendant) {
  				/*
  				 * If the top level "RE" entry of this entry
  				 * is not exposed, we, accordingly, should not
  				 * expose this entry at this time because
  				 * we cannot make its proper full-path name.
  				 */
  				if (rede_add_entry(file) == 0)
  					continue;
  				/* Otherwise we can expose this entry because
  				 * it seems its top level "RE" has already been
  				 * exposed. */
  			}
  		}
  		break;
  	}
  
  	if ((file->mode & AE_IFMT) != AE_IFREG || file->number == -1)
  		return (ARCHIVE_OK);
  
  	count = 0;
  	number = file->number;
  	iso9660->cache_files.first = NULL;
  	iso9660->cache_files.last = &(iso9660->cache_files.first);
  	empty_files.first = NULL;
  	empty_files.last = &empty_files.first;
  	/* Collect files which has the same file serial number.
  	 * Peek pending_files so that file which number is different
  	 * is not put back. */
  	while (iso9660->pending_files.used > 0 &&
  	    (iso9660->pending_files.files[0]->number == -1 ||
  	     iso9660->pending_files.files[0]->number == number)) {
  		if (file->number == -1) {
  			/* This file has the same offset
  			 * but it's wrong offset which empty files
  			 * and symlink files have.
  			 * NOTE: This wrong offset was recorded by
  			 * old mkisofs utility. If ISO images is
  			 * created by latest mkisofs, this does not
  			 * happen.
  			 */
  			file->next = NULL;
  			*empty_files.last = file;
  			empty_files.last = &(file->next);
  		} else {
  			count++;
  			cache_add_entry(iso9660, file);
  		}
  		file = next_entry(iso9660);
  	}
  
  	if (count == 0) {
  		*pfile = file;
  		return ((file == NULL)?ARCHIVE_EOF:ARCHIVE_OK);
  	}
  	if (file->number == -1) {
  		file->next = NULL;
  		*empty_files.last = file;
  		empty_files.last = &(file->next);
  	} else {
  		count++;
  		cache_add_entry(iso9660, file);
  	}
  
  	if (count > 1) {
  		/* The count is the same as number of hardlink,
  		 * so much so that each nlinks of files in cache_file
  		 * is overwritten by value of the count.
  		 */
  		for (file = iso9660->cache_files.first;
  		    file != NULL; file = file->next)
  			file->nlinks = count;
  	}
  	/* If there are empty files, that files are added
  	 * to the tail of the cache_files. */
  	if (empty_files.first != NULL) {
  		*iso9660->cache_files.last = empty_files.first;
  		iso9660->cache_files.last = empty_files.last;
  	}
  	*pfile = cache_get_entry(iso9660);
  	return ((*pfile == NULL)?ARCHIVE_EOF:ARCHIVE_OK);
  
  fatal_rr:
  	archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
  	    "Failed to connect 'CL' pointer to 'RE' rr_moved pointer of "
  	    "Rockridge extensions: current position = %jd, CL offset = %jd",
  	    (intmax_t)iso9660->current_position, (intmax_t)file->cl_offset);
  	return (ARCHIVE_FATAL);
  }
  
  static inline void
  re_add_entry(struct iso9660 *iso9660, struct file_info *file)
  {
  	file->re_next = NULL;
  	*iso9660->re_files.last = file;
  	iso9660->re_files.last = &(file->re_next);
  }
  
  static inline struct file_info *
  re_get_entry(struct iso9660 *iso9660)
  {
  	struct file_info *file;
  
  	if ((file = iso9660->re_files.first) != NULL) {
  		iso9660->re_files.first = file->re_next;
  		if (iso9660->re_files.first == NULL)
  			iso9660->re_files.last =
  			    &(iso9660->re_files.first);
  	}
  	return (file);
  }
  
  static inline int
  rede_add_entry(struct file_info *file)
  {
  	struct file_info *re;
  
  	/*
  	 * Find "RE" entry.
  	 */
  	re = file->parent;
  	while (re != NULL && !re->re)
  		re = re->parent;
  	if (re == NULL)
  		return (-1);
  
  	file->re_next = NULL;
  	*re->rede_files.last = file;
  	re->rede_files.last = &(file->re_next);
  	return (0);
  }
  
  static inline struct file_info *
  rede_get_entry(struct file_info *re)
  {
  	struct file_info *file;
  
  	if ((file = re->rede_files.first) != NULL) {
  		re->rede_files.first = file->re_next;
  		if (re->rede_files.first == NULL)
  			re->rede_files.last =
  			    &(re->rede_files.first);
  	}
  	return (file);
  }
  
  static inline void
  cache_add_entry(struct iso9660 *iso9660, struct file_info *file)
  {
  	file->next = NULL;
  	*iso9660->cache_files.last = file;
  	iso9660->cache_files.last = &(file->next);
  }
  
  static inline struct file_info *
  cache_get_entry(struct iso9660 *iso9660)
  {
  	struct file_info *file;
  
  	if ((file = iso9660->cache_files.first) != NULL) {
  		iso9660->cache_files.first = file->next;
  		if (iso9660->cache_files.first == NULL)
  			iso9660->cache_files.last =
  			    &(iso9660->cache_files.first);
  	}
  	return (file);
  }
  
  static int
  heap_add_entry(struct archive_read *a, struct heap_queue *heap,
      struct file_info *file, uint64_t key)
  {
  	uint64_t file_key, parent_key;
  	int hole, parent;
  
  	/* Expand our pending files list as necessary. */
  	if (heap->used >= heap->allocated) {
  		struct file_info **new_pending_files;
  		int new_size = heap->allocated * 2;
  
  		if (heap->allocated < 1024)
  			new_size = 1024;
  		/* Overflow might keep us from growing the list. */
  		if (new_size <= heap->allocated) {
  			archive_set_error(&a->archive,
  			    ENOMEM, "Out of memory");
  			return (ARCHIVE_FATAL);
  		}
  		new_pending_files = (struct file_info **)
  		    malloc(new_size * sizeof(new_pending_files[0]));
  		if (new_pending_files == NULL) {
  			archive_set_error(&a->archive,
  			    ENOMEM, "Out of memory");
  			return (ARCHIVE_FATAL);
  		}
  		memcpy(new_pending_files, heap->files,
  		    heap->allocated * sizeof(new_pending_files[0]));
  		if (heap->files != NULL)
  			free(heap->files);
  		heap->files = new_pending_files;
  		heap->allocated = new_size;
  	}
  
  	file_key = file->key = key;
  
  	/*
  	 * Start with hole at end, walk it up tree to find insertion point.
  	 */
  	hole = heap->used++;
  	while (hole > 0) {
  		parent = (hole - 1)/2;
  		parent_key = heap->files[parent]->key;
  		if (file_key >= parent_key) {
  			heap->files[hole] = file;
  			return (ARCHIVE_OK);
  		}
  		/* Move parent into hole <==> move hole up tree. */
  		heap->files[hole] = heap->files[parent];
  		hole = parent;
  	}
  	heap->files[0] = file;
  
  	return (ARCHIVE_OK);
  }
  
  static struct file_info *
  heap_get_entry(struct heap_queue *heap)
  {
  	uint64_t a_key, b_key, c_key;
  	int a, b, c;
  	struct file_info *r, *tmp;
  
  	if (heap->used < 1)
  		return (NULL);
  
  	/*
  	 * The first file in the list is the earliest; we'll return this.
  	 */
  	r = heap->files[0];
  
  	/*
  	 * Move the last item in the heap to the root of the tree
  	 */
  	heap->files[0] = heap->files[--(heap->used)];
  
  	/*
  	 * Rebalance the heap.
  	 */
  	a = 0; /* Starting element and its heap key */
  	a_key = heap->files[a]->key;
  	for (;;) {
  		b = a + a + 1; /* First child */
  		if (b >= heap->used)
  			return (r);
  		b_key = heap->files[b]->key;
  		c = b + 1; /* Use second child if it is smaller. */
  		if (c < heap->used) {
  			c_key = heap->files[c]->key;
  			if (c_key < b_key) {
  				b = c;
  				b_key = c_key;
  			}
  		}
  		if (a_key <= b_key)
  			return (r);
  		tmp = heap->files[a];
  		heap->files[a] = heap->files[b];
  		heap->files[b] = tmp;
  		a = b;
  	}
  }
  
  static unsigned int
  toi(const void *p, int n)
  {
  	const unsigned char *v = (const unsigned char *)p;
  	if (n > 1)
  		return v[0] + 256 * toi(v + 1, n - 1);
  	if (n == 1)
  		return v[0];
  	return (0);
  }
  
  static time_t
  isodate7(const unsigned char *v)
  {
  	struct tm tm;
  	int offset;
  	time_t t;
  
  	memset(&tm, 0, sizeof(tm));
  	tm.tm_year = v[0];
  	tm.tm_mon = v[1] - 1;
  	tm.tm_mday = v[2];
  	tm.tm_hour = v[3];
  	tm.tm_min = v[4];
  	tm.tm_sec = v[5];
  	/* v[6] is the signed timezone offset, in 1/4-hour increments. */
  	offset = ((const signed char *)v)[6];
  	if (offset > -48 && offset < 52) {
  		tm.tm_hour -= offset / 4;
  		tm.tm_min -= (offset % 4) * 15;
  	}
  	t = time_from_tm(&tm);
  	if (t == (time_t)-1)
  		return ((time_t)0);
  	return (t);
  }
  
  static time_t
  isodate17(const unsigned char *v)
  {
  	struct tm tm;
  	int offset;
  	time_t t;
  
  	memset(&tm, 0, sizeof(tm));
  	tm.tm_year = (v[0] - '0') * 1000 + (v[1] - '0') * 100
  	    + (v[2] - '0') * 10 + (v[3] - '0')
  	    - 1900;
  	tm.tm_mon = (v[4] - '0') * 10 + (v[5] - '0');
  	tm.tm_mday = (v[6] - '0') * 10 + (v[7] - '0');
  	tm.tm_hour = (v[8] - '0') * 10 + (v[9] - '0');
  	tm.tm_min = (v[10] - '0') * 10 + (v[11] - '0');
  	tm.tm_sec = (v[12] - '0') * 10 + (v[13] - '0');
  	/* v[16] is the signed timezone offset, in 1/4-hour increments. */
  	offset = ((const signed char *)v)[16];
  	if (offset > -48 && offset < 52) {
  		tm.tm_hour -= offset / 4;
  		tm.tm_min -= (offset % 4) * 15;
  	}
  	t = time_from_tm(&tm);
  	if (t == (time_t)-1)
  		return ((time_t)0);
  	return (t);
  }
  
  static time_t
  time_from_tm(struct tm *t)
  {
  #if HAVE_TIMEGM
          /* Use platform timegm() if available. */
          return (timegm(t));
  #elif HAVE__MKGMTIME64
          return (_mkgmtime64(t));
  #else
          /* Else use direct calculation using POSIX assumptions. */
          /* First, fix up tm_yday based on the year/month/day. */
          if (mktime(t) == (time_t)-1)
                  return ((time_t)-1);
          /* Then we can compute timegm() from first principles. */
          return (t->tm_sec
              + t->tm_min * 60
              + t->tm_hour * 3600
              + t->tm_yday * 86400
              + (t->tm_year - 70) * 31536000
              + ((t->tm_year - 69) / 4) * 86400
              - ((t->tm_year - 1) / 100) * 86400
              + ((t->tm_year + 299) / 400) * 86400);
  #endif
  }
  
  static const char *
  build_pathname(struct archive_string *as, struct file_info *file, int depth)
  {
  	// Plain ISO9660 only allows 8 dir levels; if we get
  	// to 1000, then something is very, very wrong.
  	if (depth > 1000) {
  		return NULL;
  	}
  	if (file->parent != NULL && archive_strlen(&file->parent->name) > 0) {
  		if (build_pathname(as, file->parent, depth + 1) == NULL) {
  			return NULL;
  		}
  		archive_strcat(as, "/");
  	}
  	if (archive_strlen(&file->name) == 0)
  		archive_strcat(as, ".");
  	else
  		archive_string_concat(as, &file->name);
  	return (as->s);
  }
  
  static int
  build_pathname_utf16be(unsigned char *p, size_t max, size_t *len,
      struct file_info *file)
  {
  	if (file->parent != NULL && file->parent->utf16be_bytes > 0) {
  		if (build_pathname_utf16be(p, max, len, file->parent) != 0)
  			return (-1);
  		p[*len] = 0;
  		p[*len + 1] = '/';
  		*len += 2;
  	}
  	if (file->utf16be_bytes == 0) {
  		if (*len + 2 > max)
  			return (-1);/* Path is too long! */
  		p[*len] = 0;
  		p[*len + 1] = '.';
  		*len += 2;
  	} else {
  		if (*len + file->utf16be_bytes > max)
  			return (-1);/* Path is too long! */
  		memcpy(p + *len, file->utf16be_name, file->utf16be_bytes);
  		*len += file->utf16be_bytes;
  	}
  	return (0);
  }
  
  #if DEBUG
  static void
  dump_isodirrec(FILE *out, const unsigned char *isodirrec)
  {
  	fprintf(out, " l %d,",
  	    toi(isodirrec + DR_length_offset, DR_length_size));
  	fprintf(out, " a %d,",
  	    toi(isodirrec + DR_ext_attr_length_offset, DR_ext_attr_length_size));
  	fprintf(out, " ext 0x%x,",
  	    toi(isodirrec + DR_extent_offset, DR_extent_size));
  	fprintf(out, " s %d,",
  	    toi(isodirrec + DR_size_offset, DR_extent_size));
  	fprintf(out, " f 0x%x,",
  	    toi(isodirrec + DR_flags_offset, DR_flags_size));
  	fprintf(out, " u %d,",
  	    toi(isodirrec + DR_file_unit_size_offset, DR_file_unit_size_size));
  	fprintf(out, " ilv %d,",
  	    toi(isodirrec + DR_interleave_offset, DR_interleave_size));
  	fprintf(out, " seq %d,",
  	    toi(isodirrec + DR_volume_sequence_number_offset,
  		DR_volume_sequence_number_size));
  	fprintf(out, " nl %d:",
  	    toi(isodirrec + DR_name_len_offset, DR_name_len_size));
  	fprintf(out, " `%.*s'",
  	    toi(isodirrec + DR_name_len_offset, DR_name_len_size),
  		isodirrec + DR_name_offset);
  }
  #endif
  