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Diffstat (limited to 'src/libs/3rdparty/libarchive/archive_read_support_format_iso9660.c')
| -rw-r--r-- | src/libs/3rdparty/libarchive/archive_read_support_format_iso9660.c | 3279 |
1 files changed, 3279 insertions, 0 deletions
diff --git a/src/libs/3rdparty/libarchive/archive_read_support_format_iso9660.c b/src/libs/3rdparty/libarchive/archive_read_support_format_iso9660.c new file mode 100644 index 000000000..f5414be2a --- /dev/null +++ b/src/libs/3rdparty/libarchive/archive_read_support_format_iso9660.c @@ -0,0 +1,3279 @@ +/*- + * 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 <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, + size_t reclen); +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 + DR_name_offset < 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, b - 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, vd->size); + 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, vd->size); + 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); + 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, size_t reclen) +{ + 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 = 0; + uint64_t fsize, offset; + int32_t location; + int flags; + + iso9660 = (struct iso9660 *)(a->format->data); + + if (reclen != 0) + dr_len = (size_t)isodirrec[DR_length_offset]; + /* + * Sanity check that reclen is not zero and dr_len is greater than + * reclen but at least 34 + */ + if (reclen == 0 || reclen < dr_len || dr_len < 34) { + archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, + "Invalid length of directory record"); + return (NULL); + } + 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 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; + int entry_seen = 0; + + 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]; + entry_seen = 1; + } + + if (entry_seen) + return (ARCHIVE_OK); + else { + archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT, + "Tried to parse Rockridge extensions, but none found"); + return (ARCHIVE_WARN); + } +} + +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); + } + if (heap->allocated) + memcpy(new_pending_files, heap->files, + heap->allocated * sizeof(new_pending_files[0])); + 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__MKGMTIME + return _mkgmtime(t); +#elif HAVE_TIMEGM + /* Use platform timegm() if available. */ + return (timegm(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 |