3e09e80261
* Handles entries with compressed size >2GB (signed/unsigned cleanup) * Handles entries with compressed size >4GB ("ZIP64" extension) * Handles Unix extensions (ctime, atime, mtime, mode, uid, etc) * Format-specific "skip data" override allows ZIP reader to skip entries without decompressing them, which makes "tar -t" a lot faster. * Handles "length-at-end" entries generated by, e.g., "zip -r - foo" Many thanks to: Dan Nelson, who contributed the code and test files for the first three items above and suggested the fourth.
1002 lines
28 KiB
C
1002 lines
28 KiB
C
/*-
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* Copyright (c) 2003-2004 Tim Kientzle
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer
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* in this position and unchanged.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "archive_platform.h"
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__FBSDID("$FreeBSD$");
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#include <sys/stat.h>
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#include <errno.h>
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/* #include <stdint.h> */ /* See archive_platform.h */
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#include <unistd.h>
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#include "archive.h"
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#include "archive_entry.h"
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#include "archive_private.h"
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#include "archive_string.h"
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/*
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* An overview of ISO 9660 format:
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*
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* Each disk is laid out as follows:
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* * 32k reserved for private use
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* * Volume descriptor table. Each volume descriptor
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* is 2k and specifies basic format information.
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* The "Primary Volume Descriptor" (PVD) is defined by the
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* standard and should always be present; other volume
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* descriptors include various vendor-specific extensions.
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* * Files and directories. Each file/dir is specified by
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* an "extent" (starting sector and length in bytes).
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* Dirs are just files with directory records packed one
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* after another. The PVD contains a single dir entry
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* specifying the location of the root directory. Everything
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* else follows from there.
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*
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* This module works by first reading the volume descriptors, then
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* building a list of directory entries, sorted by starting
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* sector. At each step, I look for the earliest dir entry that
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* hasn't yet been read, seek forward to that location and read
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* that entry. If it's a dir, I slurp in the new dir entries and
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* add them to the heap; if it's a regular file, I return the
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* corresponding archive_entry and wait for the client to request
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* the file body. This strategy allows us to read most compliant
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* CDs with a single pass through the data, as required by libarchive.
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*/
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/* Structure of on-disk PVD. */
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struct iso9660_primary_volume_descriptor {
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unsigned char type[1];
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char id[5];
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unsigned char version[1];
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char reserved1[1];
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char system_id[32];
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char volume_id[32];
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char reserved2[8];
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char volume_space_size[8];
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char reserved3[32];
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char volume_set_size[4];
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char volume_sequence_number[4];
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char logical_block_size[4];
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char path_table_size[8];
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char type_1_path_table[4];
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char opt_type_1_path_table[4];
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char type_m_path_table[4];
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char opt_type_m_path_table[4];
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char root_directory_record[34];
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char volume_set_id[128];
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char publisher_id[128];
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char preparer_id[128];
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char application_id[128];
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char copyright_file_id[37];
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char abstract_file_id[37];
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char bibliographic_file_id[37];
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char creation_date[17];
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char modification_date[17];
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char expiration_date[17];
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char effective_date[17];
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char file_structure_version[1];
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char reserved4[1];
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char application_data[512];
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};
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/* Structure of an on-disk directory record. */
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struct iso9660_directory_record {
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unsigned char length[1];
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unsigned char ext_attr_length[1];
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unsigned char extent[8];
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unsigned char size[8];
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char date[7];
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unsigned char flags[1];
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unsigned char file_unit_size[1];
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unsigned char interleave[1];
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unsigned char volume_sequence_number[4];
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unsigned char name_len[1];
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char name[1];
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};
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/*
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* Our private data.
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*/
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/* In-memory storage for a directory record. */
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struct file_info {
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struct file_info *parent;
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int refcount;
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uint64_t offset; /* Offset on disk. */
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uint64_t size; /* File size in bytes. */
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uint64_t ce_offset; /* Offset of CE */
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uint64_t ce_size; /* Size of CE */
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time_t mtime; /* File last modified time. */
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time_t atime; /* File last accessed time. */
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time_t ctime; /* File creation time. */
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mode_t mode;
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uid_t uid;
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gid_t gid;
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ino_t inode;
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int nlinks;
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char *name; /* Null-terminated filename. */
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struct archive_string symlink;
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};
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struct iso9660 {
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int magic;
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#define ISO9660_MAGIC 0x96609660
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int bid; /* If non-zero, return this as our bid. */
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struct archive_string pathname;
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char seenRockridge; /* Set true if RR extensions are used. */
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unsigned char suspOffset;
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uint64_t previous_offset;
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uint64_t previous_size;
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struct archive_string previous_pathname;
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/* TODO: Make this a heap for fast inserts and deletions. */
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struct file_info **pending_files;
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int pending_files_allocated;
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int pending_files_used;
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uint64_t current_position;
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ssize_t logical_block_size;
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off_t entry_sparse_offset;
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ssize_t entry_bytes_remaining;
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};
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static void add_entry(struct iso9660 *iso9660, struct file_info *file);
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static int archive_read_format_iso9660_bid(struct archive *);
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static int archive_read_format_iso9660_cleanup(struct archive *);
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static int archive_read_format_iso9660_read_data(struct archive *,
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const void **, size_t *, off_t *);
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static int archive_read_format_iso9660_read_header(struct archive *,
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struct archive_entry *);
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static const char *build_pathname(struct archive_string *, struct file_info *);
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static void dump_isodirrec(FILE *, const struct iso9660_directory_record *);
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static time_t isodate17(const void *);
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static time_t isodate7(const void *);
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static int isPVD(struct iso9660 *, const char *);
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static struct file_info *next_entry(struct iso9660 *);
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static int next_entry_seek(struct archive *a, struct iso9660 *iso9660,
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struct file_info **pfile);
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static struct file_info *
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parse_file_info(struct iso9660 *iso9660,
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struct file_info *parent,
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const struct iso9660_directory_record *isodirrec);
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static void parse_rockridge(struct iso9660 *iso9660,
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struct file_info *file, const unsigned char *start,
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const unsigned char *end);
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static void release_file(struct iso9660 *, struct file_info *);
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static int toi(const void *p, int n);
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int
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archive_read_support_format_iso9660(struct archive *a)
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{
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struct iso9660 *iso9660;
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int r;
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iso9660 = malloc(sizeof(*iso9660));
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memset(iso9660, 0, sizeof(*iso9660));
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iso9660->magic = ISO9660_MAGIC;
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iso9660->bid = -1; /* We haven't yet bid. */
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r = __archive_read_register_format(a,
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iso9660,
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archive_read_format_iso9660_bid,
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archive_read_format_iso9660_read_header,
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archive_read_format_iso9660_read_data,
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NULL,
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archive_read_format_iso9660_cleanup);
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if (r != ARCHIVE_OK) {
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free(iso9660);
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return (r);
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}
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return (ARCHIVE_OK);
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}
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static int
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archive_read_format_iso9660_bid(struct archive *a)
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{
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struct iso9660 *iso9660;
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ssize_t bytes_read;
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const void *h;
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const char *p;
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iso9660 = *(a->pformat_data);
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if (iso9660->bid >= 0)
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return (iso9660->bid);
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/*
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* Skip the first 32k (reserved area) and get the first
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* 8 sectors of the volume descriptor table. Of course,
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* if the I/O layer gives us more, we'll take it.
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*/
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bytes_read = (a->compression_read_ahead)(a, &h, 32768 + 8*2048);
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if (bytes_read < 32768 + 8*2048)
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return (iso9660->bid = -1);
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p = (const char *)h;
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/* Skip the reserved area. */
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bytes_read -= 32768;
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p += 32768;
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/* Check each volume descriptor to locate the PVD. */
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for (; bytes_read > 2048; bytes_read -= 2048, p += 2048) {
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iso9660->bid = isPVD(iso9660, p);
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if (iso9660->bid > 0)
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return (iso9660->bid);
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if (*p == '\xff') /* End-of-volume-descriptor marker. */
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break;
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}
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/* We didn't find a valid PVD; return a bid of zero. */
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iso9660->bid = 0;
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return (iso9660->bid);
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}
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static int
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isPVD(struct iso9660 *iso9660, const char *h)
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{
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const struct iso9660_primary_volume_descriptor *voldesc;
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struct file_info *file;
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if (h[0] != 1)
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return (0);
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if (memcmp(h+1, "CD001", 5) != 0)
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return (0);
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voldesc = (const struct iso9660_primary_volume_descriptor *)h;
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iso9660->logical_block_size = toi(&voldesc->logical_block_size, 2);
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/* Store the root directory in the pending list. */
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file = parse_file_info(iso9660, NULL,
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(struct iso9660_directory_record *)&voldesc->root_directory_record);
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add_entry(iso9660, file);
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return (48);
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}
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static int
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archive_read_format_iso9660_read_header(struct archive *a,
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struct archive_entry *entry)
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{
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struct stat st;
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struct iso9660 *iso9660;
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struct file_info *file;
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ssize_t bytes_read;
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int r;
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iso9660 = *(a->pformat_data);
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if (iso9660->seenRockridge) {
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a->archive_format = ARCHIVE_FORMAT_ISO9660_ROCKRIDGE;
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a->archive_format_name = "ISO9660 with Rockridge extensions";
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} else {
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a->archive_format = ARCHIVE_FORMAT_ISO9660;
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a->archive_format_name = "ISO9660";
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}
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/* Get the next entry that appears after the current offset. */
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r = next_entry_seek(a, iso9660, &file);
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if (r != ARCHIVE_OK)
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return (r);
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iso9660->entry_bytes_remaining = file->size;
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iso9660->entry_sparse_offset = 0; /* Offset for sparse-file-aware clients. */
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/* Set up the entry structure with information about this entry. */
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memset(&st, 0, sizeof(st));
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st.st_mode = file->mode;
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st.st_uid = file->uid;
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st.st_gid = file->gid;
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st.st_nlink = file->nlinks;
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st.st_ino = file->inode;
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st.st_mtime = file->mtime;
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st.st_ctime = file->ctime;
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st.st_atime = file->atime;
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st.st_size = iso9660->entry_bytes_remaining;
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archive_entry_copy_stat(entry, &st);
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archive_string_empty(&iso9660->pathname);
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archive_entry_set_pathname(entry,
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build_pathname(&iso9660->pathname, file));
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if (file->symlink.s != NULL)
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archive_entry_set_symlink(entry, file->symlink.s);
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/* If this entry points to the same data as the previous
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* entry, convert this into a hardlink to that entry.
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* But don't bother for zero-length files. */
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if (file->offset == iso9660->previous_offset
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&& file->size == iso9660->previous_size
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&& file->size > 0) {
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archive_entry_set_hardlink(entry,
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iso9660->previous_pathname.s);
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iso9660->entry_bytes_remaining = 0;
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iso9660->entry_sparse_offset = 0;
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release_file(iso9660, file);
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return (ARCHIVE_OK);
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}
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/* If the offset is before our current position, we can't
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* seek backwards to extract it, so issue a warning. */
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if (file->offset < iso9660->current_position) {
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archive_set_error(a, ARCHIVE_ERRNO_MISC,
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"Ignoring out-of-order file");
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iso9660->entry_bytes_remaining = 0;
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iso9660->entry_sparse_offset = 0;
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release_file(iso9660, file);
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return (ARCHIVE_WARN);
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}
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iso9660->previous_size = file->size;
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iso9660->previous_offset = file->offset;
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archive_strcpy(&iso9660->previous_pathname, iso9660->pathname.s);
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/* If this is a directory, read in all of the entries right now. */
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if (S_ISDIR(st.st_mode)) {
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while(iso9660->entry_bytes_remaining > 0) {
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const void *block;
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const unsigned char *p;
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ssize_t step = iso9660->logical_block_size;
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if (step > iso9660->entry_bytes_remaining)
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step = iso9660->entry_bytes_remaining;
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bytes_read = (a->compression_read_ahead)(a, &block, step);
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if (bytes_read < step) {
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archive_set_error(a, ARCHIVE_ERRNO_MISC,
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"Failed to read full block when scanning ISO9660 directory list");
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release_file(iso9660, file);
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return (ARCHIVE_FATAL);
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}
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if (bytes_read > step)
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bytes_read = step;
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(a->compression_read_consume)(a, bytes_read);
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iso9660->current_position += bytes_read;
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iso9660->entry_bytes_remaining -= bytes_read;
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for (p = block;
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*p != 0 && p < (const unsigned char *)block + bytes_read;
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p += *p) {
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const struct iso9660_directory_record *dr
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= (const struct iso9660_directory_record *)p;
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struct file_info *child;
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/* Skip '.' entry. */
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if (dr->name_len[0] == 1
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&& dr->name[0] == '\0')
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continue;
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/* Skip '..' entry. */
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if (dr->name_len[0] == 1
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&& dr->name[0] == '\001')
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continue;
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child = parse_file_info(iso9660, file, dr);
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add_entry(iso9660, child);
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}
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}
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}
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release_file(iso9660, file);
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return (ARCHIVE_OK);
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}
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static int
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archive_read_format_iso9660_read_data(struct archive *a,
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const void **buff, size_t *size, off_t *offset)
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{
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ssize_t bytes_read;
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struct iso9660 *iso9660;
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iso9660 = *(a->pformat_data);
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if (iso9660->entry_bytes_remaining <= 0) {
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*buff = NULL;
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*size = 0;
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*offset = iso9660->entry_sparse_offset;
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return (ARCHIVE_EOF);
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}
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bytes_read = (a->compression_read_ahead)(a, buff, 1);
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if (bytes_read <= 0)
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return (ARCHIVE_FATAL);
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if (bytes_read > iso9660->entry_bytes_remaining)
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bytes_read = iso9660->entry_bytes_remaining;
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*size = bytes_read;
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*offset = iso9660->entry_sparse_offset;
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iso9660->entry_sparse_offset += bytes_read;
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iso9660->entry_bytes_remaining -= bytes_read;
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iso9660->current_position += bytes_read;
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(a->compression_read_consume)(a, bytes_read);
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return (ARCHIVE_OK);
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}
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static int
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archive_read_format_iso9660_cleanup(struct archive *a)
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{
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struct iso9660 *iso9660;
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struct file_info *file;
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iso9660 = *(a->pformat_data);
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while ((file = next_entry(iso9660)) != NULL)
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release_file(iso9660, file);
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archive_string_free(&iso9660->pathname);
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archive_string_free(&iso9660->previous_pathname);
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free(iso9660);
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*(a->pformat_data) = NULL;
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return (ARCHIVE_OK);
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}
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/*
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* This routine parses a single ISO directory record, makes sense
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* of any extensions, and stores the result in memory.
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*/
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static struct file_info *
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parse_file_info(struct iso9660 *iso9660, struct file_info *parent,
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const struct iso9660_directory_record *isodirrec)
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{
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struct file_info *file;
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/* TODO: Sanity check that name_len doesn't exceed length, etc. */
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/* Create a new file entry and copy data from the ISO dir record. */
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file = malloc(sizeof(*file));
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memset(file, 0, sizeof(*file));
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file->parent = parent;
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if (parent != NULL)
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parent->refcount++;
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file->offset = toi(isodirrec->extent, 4)
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* iso9660->logical_block_size;
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file->size = toi(isodirrec->size, 4);
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file->mtime = isodate7(isodirrec->date);
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file->ctime = file->atime = file->mtime;
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file->name = malloc(isodirrec->name_len[0] + 1);
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memcpy(file->name, isodirrec->name, isodirrec->name_len[0]);
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file->name[(int)isodirrec->name_len[0]] = '\0';
|
|
if (isodirrec->flags[0] & 0x02)
|
|
file->mode = S_IFDIR | 0700;
|
|
else
|
|
file->mode = S_IFREG | 0400;
|
|
|
|
/* Rockridge extensions overwrite information from above. */
|
|
{
|
|
const unsigned char *rr_start, *rr_end;
|
|
rr_end = (const unsigned char *)isodirrec
|
|
+ isodirrec->length[0];
|
|
rr_start = isodirrec->name + isodirrec->name_len[0];
|
|
if ((isodirrec->name_len[0] & 1) == 0)
|
|
rr_start++;
|
|
rr_start += iso9660->suspOffset;
|
|
parse_rockridge(iso9660, file, rr_start, rr_end);
|
|
}
|
|
|
|
/* DEBUGGING: Warn about attributes I don't yet fully support. */
|
|
if ((isodirrec->flags[0] & ~0x02) != 0) {
|
|
fprintf(stderr, "\n ** Unrecognized flag: ");
|
|
dump_isodirrec(stderr, isodirrec);
|
|
fprintf(stderr, "\n");
|
|
} else if (toi(isodirrec->volume_sequence_number, 2) != 1) {
|
|
fprintf(stderr, "\n ** Unrecognized sequence number: ");
|
|
dump_isodirrec(stderr, isodirrec);
|
|
fprintf(stderr, "\n");
|
|
} else if (isodirrec->file_unit_size[0] != 0) {
|
|
fprintf(stderr, "\n ** Unexpected file unit size: ");
|
|
dump_isodirrec(stderr, isodirrec);
|
|
fprintf(stderr, "\n");
|
|
} else if (isodirrec->interleave[0] != 0) {
|
|
fprintf(stderr, "\n ** Unexpected interleave: ");
|
|
dump_isodirrec(stderr, isodirrec);
|
|
fprintf(stderr, "\n");
|
|
} else if (isodirrec->ext_attr_length[0] != 0) {
|
|
fprintf(stderr, "\n ** Unexpected extended attribute length: ");
|
|
dump_isodirrec(stderr, isodirrec);
|
|
fprintf(stderr, "\n");
|
|
}
|
|
|
|
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 (new_size < 1024)
|
|
new_size = 1024;
|
|
new_pending_files = malloc(new_size * sizeof(new_pending_files[0]));
|
|
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 */
|
|
|
|
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 + 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' && version == 1) {
|
|
/*
|
|
* CE extension comprises:
|
|
* 8 byte sector containing extension
|
|
* 8 byte offset w/in above sector
|
|
* 8 byte length of continuation
|
|
*/
|
|
file->ce_offset = toi(data, 4)
|
|
* iso9660->logical_block_size
|
|
+ toi(data + 8, 4);
|
|
file->ce_size = toi(data + 16, 4);
|
|
break;
|
|
}
|
|
/* FALLTHROUGH */
|
|
case 'N':
|
|
if (p[0] == 'N' && p[1] == 'M' && version == 1
|
|
&& *data == 0) {
|
|
/* NM extension with flag byte == 0 */
|
|
/*
|
|
* NM extension comprises:
|
|
* one byte flag
|
|
* rest is long name
|
|
*/
|
|
/* TODO: Obey flags. */
|
|
char *old_name = file->name;
|
|
|
|
data++; /* Skip flag byte. */
|
|
data_length--;
|
|
file->name = malloc(data_length + 1);
|
|
if (file->name != NULL) {
|
|
free(old_name);
|
|
memcpy(file->name, data, data_length);
|
|
file->name[data_length] = '\0';
|
|
} else
|
|
file->name = old_name;
|
|
break;
|
|
}
|
|
/* FALLTHROUGH */
|
|
case 'P':
|
|
if (p[0] == 'P' && p[1] == 'D' && version == 1) {
|
|
/*
|
|
* PD extension is padding;
|
|
* contents are always ignored.
|
|
*/
|
|
break;
|
|
}
|
|
if (p[0] == 'P' && p[1] == 'X' && version == 1) {
|
|
/*
|
|
* PX extension comprises:
|
|
* 8 bytes for mode,
|
|
* 8 bytes for nlinks,
|
|
* 8 bytes for uid,
|
|
* 8 bytes for gid,
|
|
* 8 bytes for inode.
|
|
*/
|
|
if (data_length == 32) {
|
|
file->mode = toi(data, 4);
|
|
file->nlinks = toi(data + 8, 4);
|
|
file->uid = toi(data + 16, 4);
|
|
file->gid = toi(data + 24, 4);
|
|
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' && version == 1
|
|
&& *data == 0) {
|
|
int cont = 1;
|
|
/* SL extension with flags == 0 */
|
|
/* TODO: handle non-zero flag values. */
|
|
data++; /* Skip flag byte. */
|
|
data_length--;
|
|
while (data_length > 0) {
|
|
unsigned char flag = *data++;
|
|
unsigned char nlen = *data++;
|
|
data_length -= 2;
|
|
|
|
if (cont == 0)
|
|
archive_strcat(&file->symlink, "/");
|
|
cont = 0;
|
|
|
|
switch(flag) {
|
|
case 0x01: /* Continue */
|
|
archive_strncat(&file->symlink, data, nlen);
|
|
cont = 1;
|
|
break;
|
|
case 0x02: /* Current */
|
|
archive_strcat(&file->symlink, ".");
|
|
break;
|
|
case 0x04: /* Parent */
|
|
archive_strcat(&file->symlink, "..");
|
|
break;
|
|
case 0x08: /* Root */
|
|
case 0x10: /* Volume root */
|
|
archive_string_empty(&file->symlink);
|
|
break;
|
|
case 0x20: /* Hostname */
|
|
archive_strcat(&file->symlink, "hostname");
|
|
break;
|
|
case 0:
|
|
archive_strncat(&file->symlink, data, nlen);
|
|
break;
|
|
default:
|
|
/* TODO: issue a warning ? */
|
|
break;
|
|
}
|
|
data += nlen;
|
|
data_length -= nlen;
|
|
}
|
|
break;
|
|
}
|
|
if (p[0] == 'S' && p[1] == 'P'
|
|
&& version == 1 && data_length == 7
|
|
&& 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' && version == 1) {
|
|
char flag = data[0];
|
|
/*
|
|
* 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.
|
|
*/
|
|
data++;
|
|
if (flag & 0x80) {
|
|
/* Use 17-byte time format. */
|
|
if (flag & 1) /* Create time. */
|
|
data += 17;
|
|
if (flag & 2) { /* Modify time. */
|
|
file->mtime = isodate17(data);
|
|
data += 17;
|
|
}
|
|
if (flag & 4) { /* Access time. */
|
|
file->atime = isodate17(data);
|
|
data += 17;
|
|
}
|
|
if (flag & 8) { /* Attribute time. */
|
|
file->ctime = isodate17(data);
|
|
data += 17;
|
|
}
|
|
} else {
|
|
/* Use 7-byte time format. */
|
|
if (flag & 1) /* Create time. */
|
|
data += 7;
|
|
if (flag & 2) { /* Modify time. */
|
|
file->mtime = isodate7(data);
|
|
data += 7;
|
|
}
|
|
if (flag & 4) { /* Access time. */
|
|
file->atime = isodate7(data);
|
|
data += 7;
|
|
}
|
|
if (flag & 8) { /* Attribute time. */
|
|
file->ctime = isodate7(data);
|
|
data += 7;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
/* FALLTHROUGH */
|
|
default:
|
|
/* The FALLTHROUGHs above leave us here for
|
|
* any unsupported extension. */
|
|
{
|
|
const unsigned char *t;
|
|
fprintf(stderr, "\nUnsupported RRIP extension for %s\n", file->name);
|
|
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");
|
|
}
|
|
}
|
|
|
|
|
|
|
|
p += p[2];
|
|
}
|
|
}
|
|
|
|
static void
|
|
release_file(struct iso9660 *iso9660, struct file_info *file)
|
|
{
|
|
struct file_info *parent;
|
|
|
|
if (file->refcount == 0) {
|
|
parent = file->parent;
|
|
if (file->name)
|
|
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 *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;
|
|
}
|
|
|
|
/* 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. */
|
|
while (iso9660->current_position < offset) {
|
|
ssize_t step = offset - iso9660->current_position;
|
|
ssize_t bytes_read;
|
|
const void *buff;
|
|
|
|
if (step > iso9660->logical_block_size)
|
|
step = iso9660->logical_block_size;
|
|
bytes_read = (a->compression_read_ahead)(a, &buff, step);
|
|
if (bytes_read <= 0) {
|
|
release_file(iso9660, file);
|
|
return (ARCHIVE_FATAL);
|
|
}
|
|
if (bytes_read > step)
|
|
bytes_read = step;
|
|
iso9660->current_position += bytes_read;
|
|
(a->compression_read_consume)(a, bytes_read);
|
|
}
|
|
|
|
/* 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;
|
|
ssize_t bytes_read;
|
|
const unsigned char *rr_start;
|
|
|
|
file->ce_offset = 0;
|
|
file->ce_size = 0;
|
|
bytes_read = (a->compression_read_ahead)(a, &p, size);
|
|
if (bytes_read > size)
|
|
bytes_read = size;
|
|
rr_start = (const unsigned char *)p;
|
|
parse_rockridge(iso9660, file, rr_start,
|
|
rr_start + bytes_read);
|
|
(a->compression_read_consume)(a, bytes_read);
|
|
iso9660->current_position += bytes_read;
|
|
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 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 void *p)
|
|
{
|
|
struct tm tm;
|
|
const unsigned char *v = (const unsigned char *)p;
|
|
int offset;
|
|
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 timezone offset, in 1/4-hour increments. */
|
|
offset = ((const signed char *)p)[6];
|
|
if (offset > -48 && offset < 52) {
|
|
tm.tm_hour -= offset / 4;
|
|
tm.tm_min -= (offset % 4) * 15;
|
|
}
|
|
return (timegm(&tm));
|
|
}
|
|
|
|
static time_t
|
|
isodate17(const void *p)
|
|
{
|
|
struct tm tm;
|
|
const unsigned char *v = (const unsigned char *)p;
|
|
int offset;
|
|
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 timezone offset, in 1/4-hour increments. */
|
|
offset = ((const signed char *)p)[16];
|
|
if (offset > -48 && offset < 52) {
|
|
tm.tm_hour -= offset / 4;
|
|
tm.tm_min -= (offset % 4) * 15;
|
|
}
|
|
return (timegm(&tm));
|
|
}
|
|
|
|
static const char *
|
|
build_pathname(struct archive_string *as, struct file_info *file)
|
|
{
|
|
if (file->parent != NULL && file->parent->name[0] != '\0') {
|
|
build_pathname(as, file->parent);
|
|
archive_strcat(as, "/");
|
|
}
|
|
if (file->name[0] == '\0')
|
|
archive_strcat(as, ".");
|
|
else
|
|
archive_strcat(as, file->name);
|
|
return (as->s);
|
|
}
|
|
|
|
static void
|
|
dump_isodirrec(FILE *out, const struct iso9660_directory_record *isodirrec)
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{
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fprintf(out, " l %d,", isodirrec->length[0]);
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fprintf(out, " a %d,", isodirrec->ext_attr_length[0]);
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fprintf(out, " ext 0x%x,", toi(isodirrec->extent, 4));
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fprintf(out, " s %d,", toi(isodirrec->size, 4));
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fprintf(out, " f 0x%02x,", isodirrec->flags[0]);
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fprintf(out, " u %d,", isodirrec->file_unit_size[0]);
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fprintf(out, " ilv %d,", isodirrec->interleave[0]);
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fprintf(out, " seq %d,", toi(isodirrec->volume_sequence_number,2));
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fprintf(out, " nl %d:", isodirrec->name_len[0]);
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fprintf(out, " `%.*s'", isodirrec->name_len[0], isodirrec->name);
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}
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