| /*- |
| * Copyright (c) 2003-2007 Tim Kientzle |
| * Copyright (c) 2009 Andreas Henriksson <andreas@fatal.se> |
| * 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: src/lib/libarchive/archive_read_support_format_iso9660.c,v 1.30 2008/12/06 06:57:45 kientzle Exp $"); |
| |
| #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> |
| |
| #include "archive.h" |
| #include "archive_entry.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. |
| */ |
| |
| /* 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_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_root_directory_record_offset 156 |
| #define SVD_root_directory_record_size 34 |
| /* ... */ |
| /* 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 |
| |
| /* In-memory storage for a directory record. */ |
| struct file_info { |
| struct file_info *parent; |
| int refcount; |
| uint64_t offset; /* Offset on disk. */ |
| uint64_t size; /* File size in bytes. */ |
| uint64_t ce_offset; /* Offset of CE */ |
| uint64_t ce_size; /* Size of CE */ |
| 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; |
| ino_t inode; |
| int nlinks; |
| struct archive_string name; /* Pathname */ |
| char name_continues; /* Non-zero if name continues */ |
| struct archive_string symlink; |
| char symlink_continues; /* Non-zero if link continues */ |
| }; |
| |
| |
| struct iso9660 { |
| int magic; |
| #define ISO9660_MAGIC 0x96609660 |
| |
| int option_ignore_joliet; |
| |
| struct archive_string pathname; |
| char seenRockridge; /* Set true if RR extensions are used. */ |
| unsigned char suspOffset; |
| char seenJoliet; |
| |
| uint64_t previous_offset; |
| uint64_t previous_size; |
| struct archive_string previous_pathname; |
| |
| /* TODO: Make this a heap for fast inserts and deletions. */ |
| struct file_info **pending_files; |
| int pending_files_allocated; |
| int pending_files_used; |
| |
| uint64_t current_position; |
| ssize_t logical_block_size; |
| uint64_t volume_size; /* Total size of volume in bytes. */ |
| |
| off_t entry_sparse_offset; |
| int64_t entry_bytes_remaining; |
| }; |
| |
| static void add_entry(struct iso9660 *iso9660, struct file_info *file); |
| static int archive_read_format_iso9660_bid(struct archive_read *); |
| 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 *, off_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 *); |
| #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 isJolietSVD(struct iso9660 *, const unsigned char *); |
| static int isPVD(struct iso9660 *, const unsigned char *); |
| static struct file_info *next_entry(struct iso9660 *); |
| static int next_entry_seek(struct archive_read *a, struct iso9660 *iso9660, |
| struct file_info **pfile); |
| static struct file_info * |
| parse_file_info(struct iso9660 *iso9660, |
| struct file_info *parent, const unsigned char *isodirrec); |
| static void parse_rockridge(struct iso9660 *iso9660, |
| struct file_info *file, const unsigned char *start, |
| const unsigned char *end); |
| 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 release_file(struct iso9660 *, struct file_info *); |
| static unsigned toi(const void *p, int n); |
| |
| int |
| archive_read_support_format_iso9660(struct archive *_a) |
| { |
| struct archive_read *a = (struct archive_read *)_a; |
| struct iso9660 *iso9660; |
| int r; |
| |
| iso9660 = (struct iso9660 *)malloc(sizeof(*iso9660)); |
| if (iso9660 == NULL) { |
| archive_set_error(&a->archive, ENOMEM, "Can't allocate iso9660 data"); |
| return (ARCHIVE_FATAL); |
| } |
| memset(iso9660, 0, sizeof(*iso9660)); |
| iso9660->magic = ISO9660_MAGIC; |
| |
| 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, |
| archive_read_format_iso9660_cleanup); |
| |
| if (r != ARCHIVE_OK) { |
| free(iso9660); |
| return (r); |
| } |
| return (ARCHIVE_OK); |
| } |
| |
| |
| static int |
| archive_read_format_iso9660_bid(struct archive_read *a) |
| { |
| struct iso9660 *iso9660; |
| ssize_t bytes_read, brsvd; |
| const void *h; |
| const unsigned char *p, *psvd; |
| int bid; |
| |
| 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. |
| */ |
| h = __archive_read_ahead(a, 32768 + 8*2048, &bytes_read); |
| if (h == NULL) |
| return (-1); |
| p = (const unsigned char *)h; |
| |
| /* Skip the reserved area. */ |
| bytes_read -= 32768; |
| p += 32768; |
| |
| /* Check each volume descriptor to locate possible SVD with Joliet. */ |
| for (brsvd = bytes_read, psvd = p; |
| !iso9660->option_ignore_joliet && brsvd > 2048; |
| brsvd -= 2048, psvd += 2048) { |
| bid = isJolietSVD(iso9660, psvd); |
| if (bid > 0) |
| return (bid); |
| if (*p == '\177') /* End-of-volume-descriptor marker. */ |
| break; |
| } |
| |
| /* Check each volume descriptor to locate the PVD. */ |
| for (; bytes_read > 2048; bytes_read -= 2048, p += 2048) { |
| bid = isPVD(iso9660, p); |
| if (bid > 0) |
| return (bid); |
| if (*p == '\177') /* End-of-volume-descriptor marker. */ |
| break; |
| } |
| |
| /* 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->option_ignore_joliet = 1; |
| else |
| iso9660->option_ignore_joliet = 0; |
| 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 noone used this option. */ |
| return (ARCHIVE_WARN); |
| } |
| |
| static int |
| isJolietSVD(struct iso9660 *iso9660, const unsigned char *h) |
| { |
| struct file_info *file; |
| const unsigned char *p; |
| |
| /* Type 2 means it's a SVD. */ |
| if (h[SVD_type_offset] != 2) |
| return (0); |
| |
| /* ID must be "CD001" */ |
| if (memcmp(h + SVD_id_offset, "CD001", 5) != 0) |
| 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); |
| |
| iso9660->logical_block_size = toi(h + SVD_logical_block_size_offset, 2); |
| if (iso9660->logical_block_size <= 0) |
| return (0); |
| |
| iso9660->volume_size = iso9660->logical_block_size |
| * (uint64_t)toi(h + SVD_volume_space_size_offset, 4); |
| |
| #if DEBUG |
| fprintf(stderr, "Joliet UCS-2 level %d with " |
| "logical block size:%d, volume size:%d\n", |
| iso9660->seenJoliet, |
| iso9660->logical_block_size, iso9660->volume_size); |
| #endif |
| |
| /* Store the root directory in the pending list. */ |
| file = parse_file_info(iso9660, NULL, h + SVD_root_directory_record_offset); |
| add_entry(iso9660, file); |
| |
| return (48); |
| } |
| |
| static int |
| isPVD(struct iso9660 *iso9660, const unsigned char *h) |
| { |
| struct file_info *file; |
| int i; |
| |
| /* Type of the Primary Volume Descriptor must be 1. */ |
| if (h[PVD_type_offset] != 1) |
| return (0); |
| |
| /* ID must be "CD001" */ |
| if (memcmp(h + PVD_id_offset, "CD001", 5) != 0) |
| 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. */ |
| for (i = 0; i < PVD_reserved2_size; ++i) |
| if (h[PVD_reserved2_offset + i] != 0) |
| return (0); |
| |
| /* Reserved field must be 0. */ |
| for (i = 0; i < PVD_reserved3_size; ++i) |
| if (h[PVD_reserved3_offset + i] != 0) |
| return (0); |
| |
| /* Logical block size must be > 0. */ |
| /* I've looked at Ecma 119 and can't find any stronger |
| * restriction on this field. */ |
| iso9660->logical_block_size = toi(h + PVD_logical_block_size_offset, 2); |
| if (iso9660->logical_block_size <= 0) |
| return (0); |
| |
| iso9660->volume_size = iso9660->logical_block_size |
| * (uint64_t)toi(h + PVD_volume_space_size_offset, 4); |
| |
| /* File structure version must be 1 for ISO9660/ECMA119. */ |
| if (h[PVD_file_structure_version_offset] != 1) |
| return (0); |
| |
| |
| /* Reserved field must be 0. */ |
| for (i = 0; i < PVD_reserved4_size; ++i) |
| if (h[PVD_reserved4_offset + i] != 0) |
| return (0); |
| |
| /* Reserved field must be 0. */ |
| for (i = 0; i < PVD_reserved5_size; ++i) |
| if (h[PVD_reserved5_offset + i] != 0) |
| return (0); |
| |
| /* XXX TODO: Check other values for sanity; reject more |
| * malformed PVDs. XXX */ |
| |
| /* Store the root directory in the pending list. */ |
| file = parse_file_info(iso9660, NULL, h + PVD_root_directory_record_offset); |
| add_entry(iso9660, file); |
| return (48); |
| } |
| |
| 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; |
| |
| iso9660 = (struct iso9660 *)(a->format->data); |
| |
| if (!a->archive.archive_format) { |
| a->archive.archive_format = ARCHIVE_FORMAT_ISO9660; |
| a->archive.archive_format_name = "ISO9660"; |
| } |
| |
| /* Get the next entry that appears after the current offset. */ |
| r = next_entry_seek(a, iso9660, &file); |
| if (r != ARCHIVE_OK) { |
| release_file(iso9660, file); |
| return (r); |
| } |
| |
| iso9660->entry_bytes_remaining = file->size; |
| iso9660->entry_sparse_offset = 0; /* Offset for sparse-file-aware clients. */ |
| |
| if (file->offset + file->size > iso9660->volume_size) { |
| archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, |
| "File is beyond end-of-media: %s", file->name); |
| iso9660->entry_bytes_remaining = 0; |
| iso9660->entry_sparse_offset = 0; |
| release_file(iso9660, file); |
| 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); |
| archive_entry_set_ino(entry, file->inode); |
| archive_entry_set_birthtime(entry, file->birthtime, 0); |
| 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); |
| archive_string_empty(&iso9660->pathname); |
| archive_entry_set_pathname(entry, |
| build_pathname(&iso9660->pathname, file)); |
| if (file->symlink.s != NULL) |
| archive_entry_copy_symlink(entry, file->symlink.s); |
| |
| /* If this entry points to the same data as the previous |
| * entry, convert this into a hardlink to that entry. |
| * But don't bother for zero-length files. */ |
| if (file->offset == iso9660->previous_offset |
| && file->size == iso9660->previous_size |
| && file->size > 0) { |
| archive_entry_set_hardlink(entry, |
| iso9660->previous_pathname.s); |
| iso9660->entry_bytes_remaining = 0; |
| iso9660->entry_sparse_offset = 0; |
| release_file(iso9660, file); |
| return (ARCHIVE_OK); |
| } |
| |
| /* If the offset is before our current position, we can't |
| * seek backwards to extract it, so issue a warning. */ |
| if (file->offset < iso9660->current_position) { |
| archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, |
| "Ignoring out-of-order file @%x (%s) %jd < %jd", |
| file, |
| iso9660->pathname.s, |
| file->offset, iso9660->current_position); |
| iso9660->entry_bytes_remaining = 0; |
| iso9660->entry_sparse_offset = 0; |
| release_file(iso9660, file); |
| return (ARCHIVE_WARN); |
| } |
| |
| iso9660->previous_size = file->size; |
| iso9660->previous_offset = file->offset; |
| archive_strcpy(&iso9660->previous_pathname, iso9660->pathname.s); |
| |
| /* If this is a directory, read in all of the entries right now. */ |
| if (archive_entry_filetype(entry) == AE_IFDIR) { |
| while (iso9660->entry_bytes_remaining > 0) { |
| const void *block; |
| const unsigned char *p; |
| ssize_t step = iso9660->logical_block_size; |
| if (step > iso9660->entry_bytes_remaining) |
| step = iso9660->entry_bytes_remaining; |
| block = __archive_read_ahead(a, step, NULL); |
| if (block == NULL) { |
| archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, |
| "Failed to read full block when scanning ISO9660 directory list"); |
| release_file(iso9660, file); |
| return (ARCHIVE_FATAL); |
| } |
| __archive_read_consume(a, step); |
| iso9660->current_position += step; |
| iso9660->entry_bytes_remaining -= step; |
| for (p = (const unsigned char *)block; |
| *p != 0 && p < (const unsigned char *)block + step; |
| 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(iso9660, file, p); |
| add_entry(iso9660, child); |
| if (iso9660->seenRockridge) { |
| a->archive.archive_format = |
| ARCHIVE_FORMAT_ISO9660_ROCKRIDGE; |
| a->archive.archive_format_name = |
| "ISO9660 with Rockridge extensions"; |
| } |
| } |
| } |
| } |
| |
| release_file(iso9660, file); |
| 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); |
| } |
| |
| static int |
| archive_read_format_iso9660_read_data(struct archive_read *a, |
| const void **buff, size_t *size, off_t *offset) |
| { |
| ssize_t bytes_read; |
| struct iso9660 *iso9660; |
| |
| iso9660 = (struct iso9660 *)(a->format->data); |
| if (iso9660->entry_bytes_remaining <= 0) { |
| *buff = NULL; |
| *size = 0; |
| *offset = iso9660->entry_sparse_offset; |
| return (ARCHIVE_EOF); |
| } |
| |
| *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 = 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->current_position += bytes_read; |
| __archive_read_consume(a, bytes_read); |
| return (ARCHIVE_OK); |
| } |
| |
| static int |
| archive_read_format_iso9660_cleanup(struct archive_read *a) |
| { |
| struct iso9660 *iso9660; |
| struct file_info *file; |
| |
| iso9660 = (struct iso9660 *)(a->format->data); |
| while ((file = next_entry(iso9660)) != NULL) |
| release_file(iso9660, file); |
| archive_string_free(&iso9660->pathname); |
| archive_string_free(&iso9660->previous_pathname); |
| if (iso9660->pending_files) |
| free(iso9660->pending_files); |
| free(iso9660); |
| (a->format->data) = NULL; |
| return (ARCHIVE_OK); |
| } |
| |
| /* |
| * 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 iso9660 *iso9660, struct file_info *parent, |
| const unsigned char *isodirrec) |
| { |
| struct file_info *file; |
| size_t name_len; |
| const unsigned char *rr_start, *rr_end; |
| const unsigned char *p; |
| int flags; |
| |
| /* TODO: Sanity check that name_len doesn't exceed length, etc. */ |
| |
| /* Create a new file entry and copy data from the ISO dir record. */ |
| file = (struct file_info *)malloc(sizeof(*file)); |
| if (file == NULL) |
| return (NULL); |
| memset(file, 0, sizeof(*file)); |
| file->parent = parent; |
| if (parent != NULL) |
| parent->refcount++; |
| file->offset = (uint64_t)toi(isodirrec + DR_extent_offset, DR_extent_size) |
| * iso9660->logical_block_size; |
| file->size = toi(isodirrec + DR_size_offset, DR_size_size); |
| file->mtime = isodate7(isodirrec + DR_date_offset); |
| file->ctime = file->atime = file->mtime; |
| |
| name_len = (size_t)isodirrec[DR_name_len_offset]; |
| 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) + iso9660->suspOffset; |
| rr_end = isodirrec + isodirrec[DR_length_offset]; |
| |
| if (iso9660->seenJoliet) { |
| /* Joliet names are max 64 chars (128 bytes) according to spec, |
| * but genisoimage (and others?) will allow you to have more. |
| */ |
| wchar_t wbuff[64+1], *wp; |
| const unsigned char *c; |
| |
| /* TODO: warn when name_len > 128 ? */ |
| |
| /* convert BE UTF-16 to wchar_t */ |
| for (c = p, wp = wbuff; |
| c < (p + name_len) && |
| wp < (wbuff + sizeof(wbuff)/sizeof(*wbuff) - 1); |
| c += 2) { |
| *wp++ = (((255 & (int)c[0]) << 8) | (255 & (int)c[1])); |
| } |
| *wp = L'\0'; |
| |
| #if 0 /* untested code, is it at all useful on Joliet? */ |
| /* trim trailing first version and dot from filename. |
| * |
| * Remember we where 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 (*(wp-2) == ';' && *(wp-1) == '1') { |
| wp-=2; |
| *wp = L'\0'; |
| } |
| |
| /* Chop off trailing '.' from filenames. */ |
| if (*(wp-1) == '.') |
| *(--wp) = L'\0'; |
| #endif |
| |
| /* store the result in the file name field. */ |
| archive_strappend_w_utf8(&file->name, wbuff); |
| } 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; |
| |
| /* Rockridge extensions overwrite information from above. */ |
| parse_rockridge(iso9660, file, rr_start, rr_end); |
| |
| #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 |
| return (file); |
| } |
| |
| static void |
| add_entry(struct iso9660 *iso9660, struct file_info *file) |
| { |
| /* Expand our pending files list as necessary. */ |
| if (iso9660->pending_files_used >= iso9660->pending_files_allocated) { |
| struct file_info **new_pending_files; |
| int new_size = iso9660->pending_files_allocated * 2; |
| |
| if (iso9660->pending_files_allocated < 1024) |
| new_size = 1024; |
| /* Overflow might keep us from growing the list. */ |
| if (new_size <= iso9660->pending_files_allocated) |
| __archive_errx(1, "Out of memory"); |
| new_pending_files = (struct file_info **)malloc(new_size * sizeof(new_pending_files[0])); |
| if (new_pending_files == NULL) |
| __archive_errx(1, "Out of memory"); |
| memcpy(new_pending_files, iso9660->pending_files, |
| iso9660->pending_files_allocated * sizeof(new_pending_files[0])); |
| if (iso9660->pending_files != NULL) |
| free(iso9660->pending_files); |
| iso9660->pending_files = new_pending_files; |
| iso9660->pending_files_allocated = new_size; |
| } |
| |
| iso9660->pending_files[iso9660->pending_files_used++] = file; |
| } |
| |
| static void |
| parse_rockridge(struct iso9660 *iso9660, struct file_info *file, |
| const unsigned char *p, const unsigned char *end) |
| { |
| (void)iso9660; /* UNUSED */ |
| file->name_continues = 0; |
| file->symlink_continues = 0; |
| |
| 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]; |
| |
| /* |
| * Yes, each 'if' here does test p[0] again. |
| * Otherwise, the fall-through handling to catch |
| * unsupported extensions doesn't work. |
| */ |
| switch(p[0]) { |
| case 'C': |
| if (p[0] == 'C' && 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 |
| */ |
| file->ce_offset = (uint64_t)toi(data, 4) |
| * iso9660->logical_block_size |
| + toi(data + 8, 4); |
| file->ce_size = toi(data + 16, 4); |
| /* If the result is rediculous, |
| * ignore it. */ |
| if (file->ce_offset + file->ce_size |
| > iso9660->volume_size) { |
| file->ce_offset = 0; |
| file->ce_size = 0; |
| } |
| } |
| break; |
| } |
| /* FALLTHROUGH */ |
| case 'N': |
| if (p[0] == 'N' && p[1] == 'M') { |
| if (version == 1) |
| parse_rockridge_NM1(file, |
| data, data_length); |
| break; |
| } |
| /* FALLTHROUGH */ |
| case 'P': |
| if (p[0] == 'P' && p[1] == 'D') { |
| /* |
| * PD extension is padding; |
| * contents are always ignored. |
| */ |
| break; |
| } |
| if (p[0] == 'P' && p[1] == 'N') { |
| if (version == 1 && data_length == 16) { |
| file->rdev = toi(data,4); |
| file->rdev <<= 32; |
| file->rdev |= toi(data + 8, 4); |
| } |
| break; |
| } |
| if (p[0] == 'P' && 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->inode |
| = toi(data + 32, 4); |
| } |
| break; |
| } |
| /* FALLTHROUGH */ |
| case 'R': |
| if (p[0] == 'R' && p[1] == 'R' && version == 1) { |
| iso9660->seenRockridge = 1; |
| /* |
| * RR extension comprises: |
| * one byte flag value |
| */ |
| /* TODO: Handle RR extension. */ |
| break; |
| } |
| /* FALLTHROUGH */ |
| case 'S': |
| if (p[0] == 'S' && p[1] == 'L') { |
| if (version == 1) |
| parse_rockridge_SL1(file, |
| data, data_length); |
| break; |
| } |
| if (p[0] == 'S' && p[1] == 'P' |
| && version == 1 && data_length == 3 |
| && data[0] == (unsigned char)'\xbe' |
| && data[1] == (unsigned char)'\xef') { |
| /* |
| * 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. |
| * |
| * TODO: Add a check for 'SP' in |
| * first directory entry, disable all SUSP |
| * processing if not found. |
| */ |
| iso9660->suspOffset = data[2]; |
| break; |
| } |
| if (p[0] == 'S' && 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. |
| */ |
| return; |
| } |
| case 'T': |
| if (p[0] == 'T' && p[1] == 'F') { |
| if (version == 1) |
| parse_rockridge_TF1(file, |
| data, data_length); |
| break; |
| } |
| /* FALLTHROUGH */ |
| default: |
| /* The FALLTHROUGHs above leave us here for |
| * any unsupported extension. */ |
| #if DEBUG |
| { |
| const unsigned char *t; |
| fprintf(stderr, "\nUnsupported RRIP extension for %s\n", file->name.s); |
| fprintf(stderr, " %c%c(%d):", p[0], p[1], data_length); |
| for (t = data; t < data + data_length && t < data + 16; t++) |
| fprintf(stderr, " %02x", *t); |
| fprintf(stderr, "\n"); |
| } |
| #endif |
| break; |
| } |
| |
| |
| |
| p += p[2]; |
| } |
| } |
| |
| 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 = 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); |
| data += 17; |
| data_length -= 17; |
| } |
| } else { |
| /* Use 7-byte time format. */ |
| if ((flag & 1) && data_length >= 7) { |
| /* Create time. */ |
| file->birthtime = isodate17(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); |
| data += 7; |
| data_length -= 7; |
| } |
| } |
| } |
| |
| static void |
| parse_rockridge_SL1(struct file_info *file, const unsigned char *data, |
| int data_length) |
| { |
| int component_continues = 1; |
| |
| if (!file->symlink_continues) |
| archive_string_empty(&file->symlink); |
| else |
| archive_strcat(&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; |
| |
| if (!component_continues) |
| archive_strcat(&file->symlink, "/"); |
| component_continues = 0; |
| |
| 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); |
| component_continues = 1; |
| 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_string_empty(&file->symlink); |
| archive_strcat(&file->symlink, "/"); |
| 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 |
| release_file(struct iso9660 *iso9660, struct file_info *file) |
| { |
| struct file_info *parent; |
| |
| if (file == NULL) |
| return; |
| |
| if (file->refcount == 0) { |
| parent = file->parent; |
| archive_string_free(&file->name); |
| archive_string_free(&file->symlink); |
| free(file); |
| if (parent != NULL) { |
| parent->refcount--; |
| release_file(iso9660, parent); |
| } |
| } |
| } |
| |
| static int |
| next_entry_seek(struct archive_read *a, struct iso9660 *iso9660, |
| struct file_info **pfile) |
| { |
| struct file_info *file; |
| uint64_t offset; |
| |
| *pfile = NULL; |
| for (;;) { |
| *pfile = file = next_entry(iso9660); |
| if (file == NULL) |
| return (ARCHIVE_EOF); |
| |
| /* CE area precedes actual file data? Ignore it. */ |
| if (file->ce_offset > file->offset) { |
| /* fprintf(stderr, " *** Discarding CE data.\n"); */ |
| file->ce_offset = 0; |
| file->ce_size = 0; |
| } |
| |
| /* Don't waste time seeking for zero-length bodies. */ |
| if (file->size == 0) { |
| file->offset = iso9660->current_position; |
| } |
| |
| /* If CE exists, find and read it now. */ |
| if (file->ce_offset > 0) |
| offset = file->ce_offset; |
| else |
| offset = file->offset; |
| |
| /* Seek forward to the start of the entry. */ |
| if (iso9660->current_position < offset) { |
| off_t step = offset - iso9660->current_position; |
| off_t bytes_read; |
| bytes_read = __archive_read_skip(a, step); |
| if (bytes_read < 0) |
| return (bytes_read); |
| iso9660->current_position = offset; |
| } |
| |
| /* We found body of file; handle it now. */ |
| if (offset == file->offset) |
| return (ARCHIVE_OK); |
| |
| /* Found CE? Process it and push the file back onto list. */ |
| if (offset == file->ce_offset) { |
| const void *p; |
| ssize_t size = file->ce_size; |
| const unsigned char *rr_start; |
| |
| file->ce_offset = 0; |
| file->ce_size = 0; |
| p = __archive_read_ahead(a, size, NULL); |
| if (p == NULL) |
| return (ARCHIVE_FATAL); |
| rr_start = (const unsigned char *)p; |
| parse_rockridge(iso9660, file, rr_start, |
| rr_start + size); |
| __archive_read_consume(a, size); |
| iso9660->current_position += size; |
| add_entry(iso9660, file); |
| } |
| } |
| } |
| |
| static struct file_info * |
| next_entry(struct iso9660 *iso9660) |
| { |
| int least_index; |
| uint64_t least_end_offset; |
| int i; |
| struct file_info *r; |
| |
| if (iso9660->pending_files_used < 1) |
| return (NULL); |
| |
| /* Assume the first file in the list is the earliest on disk. */ |
| least_index = 0; |
| least_end_offset = iso9660->pending_files[0]->offset |
| + iso9660->pending_files[0]->size; |
| |
| /* Now, try to find an earlier one. */ |
| for (i = 0; i < iso9660->pending_files_used; i++) { |
| /* Use the position of the file *end* as our comparison. */ |
| uint64_t end_offset = iso9660->pending_files[i]->offset |
| + iso9660->pending_files[i]->size; |
| if (iso9660->pending_files[i]->ce_offset > 0 |
| && iso9660->pending_files[i]->ce_offset < iso9660->pending_files[i]->offset) |
| end_offset = iso9660->pending_files[i]->ce_offset |
| + iso9660->pending_files[i]->ce_size; |
| if (least_end_offset > end_offset) { |
| least_index = i; |
| least_end_offset = end_offset; |
| } |
| } |
| r = iso9660->pending_files[least_index]; |
| iso9660->pending_files[least_index] |
| = iso9660->pending_files[--iso9660->pending_files_used]; |
| return (r); |
| } |
| |
| 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; |
| 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; |
| } |
| return (time_from_tm(&tm)); |
| } |
| |
| static time_t |
| isodate17(const unsigned char *v) |
| { |
| struct tm tm; |
| int offset; |
| 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; |
| } |
| return (time_from_tm(&tm)); |
| } |
| |
| static time_t |
| time_from_tm(struct tm *t) |
| { |
| #if 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. */ |
| mktime(t); |
| /* 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) |
| { |
| if (file->parent != NULL && archive_strlen(&file->parent->name) > 0) { |
| build_pathname(as, file->parent); |
| archive_strcat(as, "/"); |
| } |
| if (archive_strlen(&file->name) == 0) |
| archive_strcat(as, "."); |
| else |
| archive_string_concat(as, &file->name); |
| return (as->s); |
| } |
| |
| #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%02x,", |
| 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 |