2 * Copyright (c) 2003-2007 Tim Kientzle
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17 * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 #include "archive_platform.h"
27 __FBSDID("$FreeBSD: src/lib/libarchive/archive_read_support_format_iso9660.c,v 1.23 2007/05/29 01:00:19 kientzle Exp $");
32 /* #include <stdint.h> */ /* See archive_platform.h */
43 #include "archive_entry.h"
44 #include "archive_private.h"
45 #include "archive_read_private.h"
46 #include "archive_string.h"
49 * An overview of ISO 9660 format:
51 * Each disk is laid out as follows:
52 * * 32k reserved for private use
53 * * Volume descriptor table. Each volume descriptor
54 * is 2k and specifies basic format information.
55 * The "Primary Volume Descriptor" (PVD) is defined by the
56 * standard and should always be present; other volume
57 * descriptors include various vendor-specific extensions.
58 * * Files and directories. Each file/dir is specified by
59 * an "extent" (starting sector and length in bytes).
60 * Dirs are just files with directory records packed one
61 * after another. The PVD contains a single dir entry
62 * specifying the location of the root directory. Everything
63 * else follows from there.
65 * This module works by first reading the volume descriptors, then
66 * building a list of directory entries, sorted by starting
67 * sector. At each step, I look for the earliest dir entry that
68 * hasn't yet been read, seek forward to that location and read
69 * that entry. If it's a dir, I slurp in the new dir entries and
70 * add them to the heap; if it's a regular file, I return the
71 * corresponding archive_entry and wait for the client to request
72 * the file body. This strategy allows us to read most compliant
73 * CDs with a single pass through the data, as required by libarchive.
76 /* Structure of on-disk primary volume descriptor. */
77 #define PVD_type_offset 0
78 #define PVD_type_size 1
79 #define PVD_id_offset (PVD_type_offset + PVD_type_size)
81 #define PVD_version_offset (PVD_id_offset + PVD_id_size)
82 #define PVD_version_size 1
83 #define PVD_reserved1_offset (PVD_version_offset + PVD_version_size)
84 #define PVD_reserved1_size 1
85 #define PVD_system_id_offset (PVD_reserved1_offset + PVD_reserved1_size)
86 #define PVD_system_id_size 32
87 #define PVD_volume_id_offset (PVD_system_id_offset + PVD_system_id_size)
88 #define PVD_volume_id_size 32
89 #define PVD_reserved2_offset (PVD_volume_id_offset + PVD_volume_id_size)
90 #define PVD_reserved2_size 8
91 #define PVD_volume_space_size_offset (PVD_reserved2_offset + PVD_reserved2_size)
92 #define PVD_volume_space_size_size 8
93 #define PVD_reserved3_offset (PVD_volume_space_size_offset + PVD_volume_space_size_size)
94 #define PVD_reserved3_size 32
95 #define PVD_volume_set_size_offset (PVD_reserved3_offset + PVD_reserved3_size)
96 #define PVD_volume_set_size_size 4
97 #define PVD_volume_sequence_number_offset (PVD_volume_set_size_offset + PVD_volume_set_size_size)
98 #define PVD_volume_sequence_number_size 4
99 #define PVD_logical_block_size_offset (PVD_volume_sequence_number_offset + PVD_volume_sequence_number_size)
100 #define PVD_logical_block_size_size 4
101 #define PVD_path_table_size_offset (PVD_logical_block_size_offset + PVD_logical_block_size_size)
102 #define PVD_path_table_size_size 8
103 #define PVD_type_1_path_table_offset (PVD_path_table_size_offset + PVD_path_table_size_size)
104 #define PVD_type_1_path_table_size 4
105 #define PVD_opt_type_1_path_table_offset (PVD_type_1_path_table_offset + PVD_type_1_path_table_size)
106 #define PVD_opt_type_1_path_table_size 4
107 #define PVD_type_m_path_table_offset (PVD_opt_type_1_path_table_offset + PVD_opt_type_1_path_table_size)
108 #define PVD_type_m_path_table_size 4
109 #define PVD_opt_type_m_path_table_offset (PVD_type_m_path_table_offset + PVD_type_m_path_table_size)
110 #define PVD_opt_type_m_path_table_size 4
111 #define PVD_root_directory_record_offset (PVD_opt_type_m_path_table_offset + PVD_opt_type_m_path_table_size)
112 #define PVD_root_directory_record_size 34
113 #define PVD_volume_set_id_offset (PVD_root_directory_record_offset + PVD_root_directory_record_size)
114 #define PVD_volume_set_id_size 128
115 #define PVD_publisher_id_offset (PVD_volume_set_id_offset + PVD_volume_set_id_size)
116 #define PVD_publisher_id_size 128
117 #define PVD_preparer_id_offset (PVD_publisher_id_offset + PVD_publisher_id_size)
118 #define PVD_preparer_id_size 128
119 #define PVD_application_id_offset (PVD_preparer_id_offset + PVD_preparer_id_size)
120 #define PVD_application_id_size 128
121 #define PVD_copyright_file_id_offset (PVD_application_id_offset + PVD_application_id_size)
122 #define PVD_copyright_file_id_size 37
123 #define PVD_abstract_file_id_offset (PVD_copyright_file_id_offset + PVD_copyright_file_id_size)
124 #define PVD_abstract_file_id_size 37
125 #define PVD_bibliographic_file_id_offset (PVD_abstract_file_id_offset + PVD_abstract_file_id_size)
126 #define PVD_bibliographic_file_id_size 37
127 #define PVD_creation_date_offset (PVD_bibliographic_file_id_offset + PVD_bibliographic_file_id_size)
128 #define PVD_creation_date_size 17
129 #define PVD_modification_date_offset (PVD_creation_date_offset + PVD_creation_date_size)
130 #define PVD_modification_date_size 17
131 #define PVD_expiration_date_offset (PVD_modification_date_offset + PVD_modification_date_size)
132 #define PVD_expiration_date_size 17
133 #define PVD_effective_date_offset (PVD_expiration_date_offset + PVD_expiration_date_size)
134 #define PVD_effective_date_size 17
135 #define PVD_file_structure_version_offset (PVD_effective_date_offset + PVD_effective_date_size)
136 #define PVD_file_structure_version_size 1
137 #define PVD_reserved4_offset (PVD_file_structure_version_offset + PVD_file_structure_version_size)
138 #define PVD_reserved4_size 1
139 #define PVD_application_data_offset (PVD_reserved4_offset + PVD_reserved4_size)
140 #define PVD_application_data_size 512
142 /* Structure of an on-disk directory record. */
143 /* Note: ISO9660 stores each multi-byte integer twice, once in
144 * each byte order. The sizes here are the size of just one
145 * of the two integers. (This is why the offset of a field isn't
146 * the same as the offset+size of the previous field.) */
147 #define DR_length_offset 0
148 #define DR_length_size 1
149 #define DR_ext_attr_length_offset 1
150 #define DR_ext_attr_length_size 1
151 #define DR_extent_offset 2
152 #define DR_extent_size 4
153 #define DR_size_offset 10
154 #define DR_size_size 4
155 #define DR_date_offset 18
156 #define DR_date_size 7
157 #define DR_flags_offset 25
158 #define DR_flags_size 1
159 #define DR_file_unit_size_offset 26
160 #define DR_file_unit_size_size 1
161 #define DR_interleave_offset 27
162 #define DR_interleave_size 1
163 #define DR_volume_sequence_number_offset 28
164 #define DR_volume_sequence_number_size 2
165 #define DR_name_len_offset 32
166 #define DR_name_len_size 1
167 #define DR_name_offset 33
173 /* In-memory storage for a directory record. */
175 struct file_info *parent;
177 uint64_t offset; /* Offset on disk. */
178 uint64_t size; /* File size in bytes. */
179 uint64_t ce_offset; /* Offset of CE */
180 uint64_t ce_size; /* Size of CE */
181 time_t mtime; /* File last modified time. */
182 time_t atime; /* File last accessed time. */
183 time_t ctime; /* File creation time. */
189 char *name; /* Null-terminated filename. */
190 struct archive_string symlink;
196 #define ISO9660_MAGIC 0x96609660
197 struct archive_string pathname;
198 char seenRockridge; /* Set true if RR extensions are used. */
199 unsigned char suspOffset;
201 uint64_t previous_offset;
202 uint64_t previous_size;
203 struct archive_string previous_pathname;
205 /* TODO: Make this a heap for fast inserts and deletions. */
206 struct file_info **pending_files;
207 int pending_files_allocated;
208 int pending_files_used;
210 uint64_t current_position;
211 ssize_t logical_block_size;
213 off_t entry_sparse_offset;
214 int64_t entry_bytes_remaining;
217 static void add_entry(struct iso9660 *iso9660, struct file_info *file);
218 static int archive_read_format_iso9660_bid(struct archive_read *);
219 static int archive_read_format_iso9660_cleanup(struct archive_read *);
220 static int archive_read_format_iso9660_read_data(struct archive_read *,
221 const void **, size_t *, off_t *);
222 static int archive_read_format_iso9660_read_data_skip(struct archive_read *);
223 static int archive_read_format_iso9660_read_header(struct archive_read *,
224 struct archive_entry *);
225 static const char *build_pathname(struct archive_string *, struct file_info *);
226 static void dump_isodirrec(FILE *, const unsigned char *isodirrec);
227 static time_t time_from_tm(struct tm *);
228 static time_t isodate17(const unsigned char *);
229 static time_t isodate7(const unsigned char *);
230 static int isPVD(struct iso9660 *, const unsigned char *);
231 static struct file_info *next_entry(struct iso9660 *);
232 static int next_entry_seek(struct archive_read *a, struct iso9660 *iso9660,
233 struct file_info **pfile);
234 static struct file_info *
235 parse_file_info(struct iso9660 *iso9660,
236 struct file_info *parent, const unsigned char *isodirrec);
237 static void parse_rockridge(struct iso9660 *iso9660,
238 struct file_info *file, const unsigned char *start,
239 const unsigned char *end);
240 static void release_file(struct iso9660 *, struct file_info *);
241 static unsigned toi(const void *p, int n);
244 archive_read_support_format_iso9660(struct archive *_a)
246 struct archive_read *a = (struct archive_read *)_a;
247 struct iso9660 *iso9660;
250 iso9660 = (struct iso9660 *)malloc(sizeof(*iso9660));
251 if (iso9660 == NULL) {
252 archive_set_error(&a->archive, ENOMEM, "Can't allocate iso9660 data");
253 return (ARCHIVE_FATAL);
255 memset(iso9660, 0, sizeof(*iso9660));
256 iso9660->magic = ISO9660_MAGIC;
258 r = __archive_read_register_format(a,
260 archive_read_format_iso9660_bid,
261 archive_read_format_iso9660_read_header,
262 archive_read_format_iso9660_read_data,
263 archive_read_format_iso9660_read_data_skip,
264 archive_read_format_iso9660_cleanup);
266 if (r != ARCHIVE_OK) {
275 archive_read_format_iso9660_bid(struct archive_read *a)
277 struct iso9660 *iso9660;
280 const unsigned char *p;
283 iso9660 = (struct iso9660 *)(a->format->data);
286 * Skip the first 32k (reserved area) and get the first
287 * 8 sectors of the volume descriptor table. Of course,
288 * if the I/O layer gives us more, we'll take it.
290 bytes_read = (a->decompressor->read_ahead)(a, &h, 32768 + 8*2048);
291 if (bytes_read < 32768 + 8*2048)
293 p = (const unsigned char *)h;
295 /* Skip the reserved area. */
299 /* Check each volume descriptor to locate the PVD. */
300 for (; bytes_read > 2048; bytes_read -= 2048, p += 2048) {
301 bid = isPVD(iso9660, p);
304 if (*p == '\177') /* End-of-volume-descriptor marker. */
308 /* We didn't find a valid PVD; return a bid of zero. */
313 isPVD(struct iso9660 *iso9660, const unsigned char *h)
315 struct file_info *file;
319 if (memcmp(h+1, "CD001", 5) != 0)
322 iso9660->logical_block_size = toi(h + PVD_logical_block_size_offset, 2);
324 /* Store the root directory in the pending list. */
325 file = parse_file_info(iso9660, NULL, h + PVD_root_directory_record_offset);
326 add_entry(iso9660, file);
331 archive_read_format_iso9660_read_header(struct archive_read *a,
332 struct archive_entry *entry)
334 struct iso9660 *iso9660;
335 struct file_info *file;
339 iso9660 = (struct iso9660 *)(a->format->data);
341 if (!a->archive.archive_format) {
342 a->archive.archive_format = ARCHIVE_FORMAT_ISO9660;
343 a->archive.archive_format_name = "ISO9660";
346 /* Get the next entry that appears after the current offset. */
347 r = next_entry_seek(a, iso9660, &file);
351 iso9660->entry_bytes_remaining = file->size;
352 iso9660->entry_sparse_offset = 0; /* Offset for sparse-file-aware clients. */
354 /* Set up the entry structure with information about this entry. */
355 archive_entry_set_mode(entry, file->mode);
356 archive_entry_set_uid(entry, file->uid);
357 archive_entry_set_gid(entry, file->gid);
358 archive_entry_set_nlink(entry, file->nlinks);
359 archive_entry_set_ino(entry, file->inode);
360 archive_entry_set_mtime(entry, file->mtime, 0);
361 archive_entry_set_ctime(entry, file->ctime, 0);
362 archive_entry_set_atime(entry, file->atime, 0);
363 archive_entry_set_size(entry, iso9660->entry_bytes_remaining);
364 archive_string_empty(&iso9660->pathname);
365 archive_entry_set_pathname(entry,
366 build_pathname(&iso9660->pathname, file));
367 if (file->symlink.s != NULL)
368 archive_entry_copy_symlink(entry, file->symlink.s);
370 /* If this entry points to the same data as the previous
371 * entry, convert this into a hardlink to that entry.
372 * But don't bother for zero-length files. */
373 if (file->offset == iso9660->previous_offset
374 && file->size == iso9660->previous_size
376 archive_entry_set_hardlink(entry,
377 iso9660->previous_pathname.s);
378 iso9660->entry_bytes_remaining = 0;
379 iso9660->entry_sparse_offset = 0;
380 release_file(iso9660, file);
384 /* If the offset is before our current position, we can't
385 * seek backwards to extract it, so issue a warning. */
386 if (file->offset < iso9660->current_position) {
387 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
388 "Ignoring out-of-order file");
389 iso9660->entry_bytes_remaining = 0;
390 iso9660->entry_sparse_offset = 0;
391 release_file(iso9660, file);
392 return (ARCHIVE_WARN);
395 iso9660->previous_size = file->size;
396 iso9660->previous_offset = file->offset;
397 archive_strcpy(&iso9660->previous_pathname, iso9660->pathname.s);
399 /* If this is a directory, read in all of the entries right now. */
400 if (archive_entry_filetype(entry) == AE_IFDIR) {
401 while (iso9660->entry_bytes_remaining > 0) {
403 const unsigned char *p;
404 ssize_t step = iso9660->logical_block_size;
405 if (step > iso9660->entry_bytes_remaining)
406 step = iso9660->entry_bytes_remaining;
407 bytes_read = (a->decompressor->read_ahead)(a, &block, step);
408 if (bytes_read < step) {
409 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
410 "Failed to read full block when scanning ISO9660 directory list");
411 release_file(iso9660, file);
412 return (ARCHIVE_FATAL);
414 if (bytes_read > step)
416 (a->decompressor->consume)(a, bytes_read);
417 iso9660->current_position += bytes_read;
418 iso9660->entry_bytes_remaining -= bytes_read;
419 for (p = (const unsigned char *)block;
420 *p != 0 && p < (const unsigned char *)block + bytes_read;
422 struct file_info *child;
424 /* Skip '.' entry. */
425 if (*(p + DR_name_len_offset) == 1
426 && *(p + DR_name_offset) == '\0')
428 /* Skip '..' entry. */
429 if (*(p + DR_name_len_offset) == 1
430 && *(p + DR_name_offset) == '\001')
432 child = parse_file_info(iso9660, file, p);
433 add_entry(iso9660, child);
434 if (iso9660->seenRockridge) {
435 a->archive.archive_format =
436 ARCHIVE_FORMAT_ISO9660_ROCKRIDGE;
437 a->archive.archive_format_name =
438 "ISO9660 with Rockridge extensions";
444 release_file(iso9660, file);
449 archive_read_format_iso9660_read_data_skip(struct archive_read *a)
451 /* Because read_next_header always does an explicit skip
452 * to the next entry, we don't need to do anything here. */
453 (void)a; /* UNUSED */
458 archive_read_format_iso9660_read_data(struct archive_read *a,
459 const void **buff, size_t *size, off_t *offset)
462 struct iso9660 *iso9660;
464 iso9660 = (struct iso9660 *)(a->format->data);
465 if (iso9660->entry_bytes_remaining <= 0) {
468 *offset = iso9660->entry_sparse_offset;
469 return (ARCHIVE_EOF);
472 bytes_read = (a->decompressor->read_ahead)(a, buff, 1);
474 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
475 "Truncated input file");
477 return (ARCHIVE_FATAL);
478 if (bytes_read > iso9660->entry_bytes_remaining)
479 bytes_read = iso9660->entry_bytes_remaining;
481 *offset = iso9660->entry_sparse_offset;
482 iso9660->entry_sparse_offset += bytes_read;
483 iso9660->entry_bytes_remaining -= bytes_read;
484 iso9660->current_position += bytes_read;
485 (a->decompressor->consume)(a, bytes_read);
490 archive_read_format_iso9660_cleanup(struct archive_read *a)
492 struct iso9660 *iso9660;
493 struct file_info *file;
495 iso9660 = (struct iso9660 *)(a->format->data);
496 while ((file = next_entry(iso9660)) != NULL)
497 release_file(iso9660, file);
498 archive_string_free(&iso9660->pathname);
499 archive_string_free(&iso9660->previous_pathname);
500 if (iso9660->pending_files)
501 free(iso9660->pending_files);
503 (a->format->data) = NULL;
508 * This routine parses a single ISO directory record, makes sense
509 * of any extensions, and stores the result in memory.
511 static struct file_info *
512 parse_file_info(struct iso9660 *iso9660, struct file_info *parent,
513 const unsigned char *isodirrec)
515 struct file_info *file;
519 /* TODO: Sanity check that name_len doesn't exceed length, etc. */
521 /* Create a new file entry and copy data from the ISO dir record. */
522 file = (struct file_info *)malloc(sizeof(*file));
525 memset(file, 0, sizeof(*file));
526 file->parent = parent;
529 file->offset = toi(isodirrec + DR_extent_offset, DR_extent_size)
530 * iso9660->logical_block_size;
531 file->size = toi(isodirrec + DR_size_offset, DR_size_size);
532 file->mtime = isodate7(isodirrec + DR_date_offset);
533 file->ctime = file->atime = file->mtime;
534 name_len = (size_t)*(const unsigned char *)(isodirrec + DR_name_len_offset);
535 file->name = (char *)malloc(name_len + 1);
536 if (file->name == NULL) {
540 memcpy(file->name, isodirrec + DR_name_offset, name_len);
541 file->name[name_len] = '\0';
542 flags = *(isodirrec + DR_flags_offset);
544 file->mode = AE_IFDIR | 0700;
546 file->mode = AE_IFREG | 0400;
548 /* Rockridge extensions overwrite information from above. */
550 const unsigned char *rr_start, *rr_end;
551 rr_end = (const unsigned char *)isodirrec
552 + *(isodirrec + DR_length_offset);
553 rr_start = (const unsigned char *)(isodirrec + DR_name_offset
555 if ((name_len & 1) == 0)
557 rr_start += iso9660->suspOffset;
558 parse_rockridge(iso9660, file, rr_start, rr_end);
561 /* DEBUGGING: Warn about attributes I don't yet fully support. */
562 if ((flags & ~0x02) != 0) {
563 fprintf(stderr, "\n ** Unrecognized flag: ");
564 dump_isodirrec(stderr, isodirrec);
565 fprintf(stderr, "\n");
566 } else if (toi(isodirrec + DR_volume_sequence_number_offset, 2) != 1) {
567 fprintf(stderr, "\n ** Unrecognized sequence number: ");
568 dump_isodirrec(stderr, isodirrec);
569 fprintf(stderr, "\n");
570 } else if (*(isodirrec + DR_file_unit_size_offset) != 0) {
571 fprintf(stderr, "\n ** Unexpected file unit size: ");
572 dump_isodirrec(stderr, isodirrec);
573 fprintf(stderr, "\n");
574 } else if (*(isodirrec + DR_interleave_offset) != 0) {
575 fprintf(stderr, "\n ** Unexpected interleave: ");
576 dump_isodirrec(stderr, isodirrec);
577 fprintf(stderr, "\n");
578 } else if (*(isodirrec + DR_ext_attr_length_offset) != 0) {
579 fprintf(stderr, "\n ** Unexpected extended attribute length: ");
580 dump_isodirrec(stderr, isodirrec);
581 fprintf(stderr, "\n");
588 add_entry(struct iso9660 *iso9660, struct file_info *file)
590 /* Expand our pending files list as necessary. */
591 if (iso9660->pending_files_used >= iso9660->pending_files_allocated) {
592 struct file_info **new_pending_files;
593 int new_size = iso9660->pending_files_allocated * 2;
597 new_pending_files = (struct file_info **)malloc(new_size * sizeof(new_pending_files[0]));
598 if (new_pending_files == NULL)
599 __archive_errx(1, "Out of memory");
600 memcpy(new_pending_files, iso9660->pending_files,
601 iso9660->pending_files_allocated * sizeof(new_pending_files[0]));
602 if (iso9660->pending_files != NULL)
603 free(iso9660->pending_files);
604 iso9660->pending_files = new_pending_files;
605 iso9660->pending_files_allocated = new_size;
608 iso9660->pending_files[iso9660->pending_files_used++] = file;
612 parse_rockridge(struct iso9660 *iso9660, struct file_info *file,
613 const unsigned char *p, const unsigned char *end)
615 (void)iso9660; /* UNUSED */
617 while (p + 4 < end /* Enough space for another entry. */
618 && p[0] >= 'A' && p[0] <= 'Z' /* Sanity-check 1st char of name. */
619 && p[1] >= 'A' && p[1] <= 'Z' /* Sanity-check 2nd char of name. */
620 && p + p[2] <= end) { /* Sanity-check length. */
621 const unsigned char *data = p + 4;
622 int data_length = p[2] - 4;
626 * Yes, each 'if' here does test p[0] again.
627 * Otherwise, the fall-through handling to catch
628 * unsupported extensions doesn't work.
632 if (p[0] == 'C' && p[1] == 'E' && version == 1) {
634 * CE extension comprises:
635 * 8 byte sector containing extension
636 * 8 byte offset w/in above sector
637 * 8 byte length of continuation
639 file->ce_offset = toi(data, 4)
640 * iso9660->logical_block_size
642 file->ce_size = toi(data + 16, 4);
647 if (p[0] == 'N' && p[1] == 'M' && version == 1
649 /* NM extension with flag byte == 0 */
651 * NM extension comprises:
655 /* TODO: Obey flags. */
656 char *old_name = file->name;
658 data++; /* Skip flag byte. */
660 file->name = (char *)malloc(data_length + 1);
661 if (file->name != NULL) {
663 memcpy(file->name, data, data_length);
664 file->name[data_length] = '\0';
666 file->name = old_name;
671 if (p[0] == 'P' && p[1] == 'D' && version == 1) {
673 * PD extension is padding;
674 * contents are always ignored.
678 if (p[0] == 'P' && p[1] == 'X' && version == 1) {
680 * PX extension comprises:
682 * 8 bytes for nlinks,
687 if (data_length == 32) {
688 file->mode = toi(data, 4);
689 file->nlinks = toi(data + 8, 4);
690 file->uid = toi(data + 16, 4);
691 file->gid = toi(data + 24, 4);
692 file->inode = toi(data + 32, 4);
698 if (p[0] == 'R' && p[1] == 'R' && version == 1) {
699 iso9660->seenRockridge = 1;
701 * RR extension comprises:
702 * one byte flag value
704 /* TODO: Handle RR extension. */
709 if (p[0] == 'S' && p[1] == 'L' && version == 1
712 /* SL extension with flags == 0 */
713 /* TODO: handle non-zero flag values. */
714 data++; /* Skip flag byte. */
716 while (data_length > 0) {
717 unsigned char flag = *data++;
718 unsigned char nlen = *data++;
722 archive_strcat(&file->symlink, "/");
726 case 0x01: /* Continue */
727 archive_strncat(&file->symlink,
728 (const char *)data, nlen);
731 case 0x02: /* Current */
732 archive_strcat(&file->symlink, ".");
734 case 0x04: /* Parent */
735 archive_strcat(&file->symlink, "..");
737 case 0x08: /* Root */
738 case 0x10: /* Volume root */
739 archive_string_empty(&file->symlink);
741 case 0x20: /* Hostname */
742 archive_strcat(&file->symlink, "hostname");
745 archive_strncat(&file->symlink,
746 (const char *)data, nlen);
749 /* TODO: issue a warning ? */
757 if (p[0] == 'S' && p[1] == 'P'
758 && version == 1 && data_length == 7
759 && data[0] == (unsigned char)'\xbe'
760 && data[1] == (unsigned char)'\xef') {
762 * SP extension stores the suspOffset
763 * (Number of bytes to skip between
764 * filename and SUSP records.)
765 * It is mandatory by the SUSP standard
768 * It allows SUSP to coexist with
769 * non-SUSP uses of the System
770 * Use Area by placing non-SUSP data
773 * TODO: Add a check for 'SP' in
774 * first directory entry, disable all SUSP
775 * processing if not found.
777 iso9660->suspOffset = data[2];
780 if (p[0] == 'S' && p[1] == 'T'
781 && data_length == 0 && version == 1) {
783 * ST extension marks end of this
784 * block of SUSP entries.
786 * It allows SUSP to coexist with
787 * non-SUSP uses of the System
788 * Use Area by placing non-SUSP data
794 if (p[0] == 'T' && p[1] == 'F' && version == 1) {
797 * TF extension comprises:
799 * create time (optional)
800 * modify time (optional)
801 * access time (optional)
802 * attribute time (optional)
803 * Time format and presence of fields
804 * is controlled by flag bits.
808 /* Use 17-byte time format. */
809 if (flag & 1) /* Create time. */
811 if (flag & 2) { /* Modify time. */
812 file->mtime = isodate17(data);
815 if (flag & 4) { /* Access time. */
816 file->atime = isodate17(data);
819 if (flag & 8) { /* Attribute time. */
820 file->ctime = isodate17(data);
824 /* Use 7-byte time format. */
825 if (flag & 1) /* Create time. */
827 if (flag & 2) { /* Modify time. */
828 file->mtime = isodate7(data);
831 if (flag & 4) { /* Access time. */
832 file->atime = isodate7(data);
835 if (flag & 8) { /* Attribute time. */
836 file->ctime = isodate7(data);
844 /* The FALLTHROUGHs above leave us here for
845 * any unsupported extension. */
847 const unsigned char *t;
848 fprintf(stderr, "\nUnsupported RRIP extension for %s\n", file->name);
849 fprintf(stderr, " %c%c(%d):", p[0], p[1], data_length);
850 for (t = data; t < data + data_length && t < data + 16; t++)
851 fprintf(stderr, " %02x", *t);
852 fprintf(stderr, "\n");
863 release_file(struct iso9660 *iso9660, struct file_info *file)
865 struct file_info *parent;
867 if (file->refcount == 0) {
868 parent = file->parent;
871 archive_string_free(&file->symlink);
873 if (parent != NULL) {
875 release_file(iso9660, parent);
881 next_entry_seek(struct archive_read *a, struct iso9660 *iso9660,
882 struct file_info **pfile)
884 struct file_info *file;
889 *pfile = file = next_entry(iso9660);
891 return (ARCHIVE_EOF);
893 /* CE area precedes actual file data? Ignore it. */
894 if (file->ce_offset > file->offset) {
895 fprintf(stderr, " *** Discarding CE data.\n");
900 /* If CE exists, find and read it now. */
901 if (file->ce_offset > 0)
902 offset = file->ce_offset;
904 offset = file->offset;
906 /* Seek forward to the start of the entry. */
907 if (iso9660->current_position < offset) {
908 off_t step = offset - iso9660->current_position;
910 bytes_read = (a->decompressor->skip)(a, step);
913 iso9660->current_position = offset;
916 /* We found body of file; handle it now. */
917 if (offset == file->offset)
920 /* Found CE? Process it and push the file back onto list. */
921 if (offset == file->ce_offset) {
923 ssize_t size = file->ce_size;
925 const unsigned char *rr_start;
929 bytes_read = (a->decompressor->read_ahead)(a, &p, size);
930 if (bytes_read > size)
932 rr_start = (const unsigned char *)p;
933 parse_rockridge(iso9660, file, rr_start,
934 rr_start + bytes_read);
935 (a->decompressor->consume)(a, bytes_read);
936 iso9660->current_position += bytes_read;
937 add_entry(iso9660, file);
942 static struct file_info *
943 next_entry(struct iso9660 *iso9660)
946 uint64_t least_end_offset;
950 if (iso9660->pending_files_used < 1)
953 /* Assume the first file in the list is the earliest on disk. */
955 least_end_offset = iso9660->pending_files[0]->offset
956 + iso9660->pending_files[0]->size;
958 /* Now, try to find an earlier one. */
959 for (i = 0; i < iso9660->pending_files_used; i++) {
960 /* Use the position of the file *end* as our comparison. */
961 uint64_t end_offset = iso9660->pending_files[i]->offset
962 + iso9660->pending_files[i]->size;
963 if (iso9660->pending_files[i]->ce_offset > 0
964 && iso9660->pending_files[i]->ce_offset < iso9660->pending_files[i]->offset)
965 end_offset = iso9660->pending_files[i]->ce_offset
966 + iso9660->pending_files[i]->ce_size;
967 if (least_end_offset > end_offset) {
969 least_end_offset = end_offset;
972 r = iso9660->pending_files[least_index];
973 iso9660->pending_files[least_index]
974 = iso9660->pending_files[--iso9660->pending_files_used];
979 toi(const void *p, int n)
981 const unsigned char *v = (const unsigned char *)p;
983 return v[0] + 256 * toi(v + 1, n - 1);
990 isodate7(const unsigned char *v)
994 memset(&tm, 0, sizeof(tm));
996 tm.tm_mon = v[1] - 1;
1001 /* v[6] is the signed timezone offset, in 1/4-hour increments. */
1002 offset = ((const signed char *)v)[6];
1003 if (offset > -48 && offset < 52) {
1004 tm.tm_hour -= offset / 4;
1005 tm.tm_min -= (offset % 4) * 15;
1007 return (time_from_tm(&tm));
1011 isodate17(const unsigned char *v)
1015 memset(&tm, 0, sizeof(tm));
1016 tm.tm_year = (v[0] - '0') * 1000 + (v[1] - '0') * 100
1017 + (v[2] - '0') * 10 + (v[3] - '0')
1019 tm.tm_mon = (v[4] - '0') * 10 + (v[5] - '0');
1020 tm.tm_mday = (v[6] - '0') * 10 + (v[7] - '0');
1021 tm.tm_hour = (v[8] - '0') * 10 + (v[9] - '0');
1022 tm.tm_min = (v[10] - '0') * 10 + (v[11] - '0');
1023 tm.tm_sec = (v[12] - '0') * 10 + (v[13] - '0');
1024 /* v[16] is the signed timezone offset, in 1/4-hour increments. */
1025 offset = ((const signed char *)v)[16];
1026 if (offset > -48 && offset < 52) {
1027 tm.tm_hour -= offset / 4;
1028 tm.tm_min -= (offset % 4) * 15;
1030 return (time_from_tm(&tm));
1034 * timegm() converts a struct tm to a time_t, except it isn't standard,
1035 * so I provide my own function here that (ideally) is just a wrapper
1039 time_from_tm(struct tm *t)
1043 #elif HAVE_STRUCT_TM_TM_GMTOFF
1045 * Unfortunately, timegm() isn't standard. The standard
1046 * mktime() function is a close match, except that it uses
1047 * local timezone instead of GMT. You can compensate for
1048 * this by adding the timezone and DST offsets back in, at
1049 * the cost of two calls to mktime().
1051 mktime(t); /* Normalize the time and get the TZ offset. */
1052 t->tm_sec += t->tm_gmtoff; /* Try to adjust for the timezone and DST.*/
1055 return (mktime(t)); /* Re-convert. */
1058 * If you don't have tm_gmtoff, let's try resetting the timezone
1065 setenv("TZ", "UTC 0", 1);
1069 setenv("TZ", tz, 1);
1078 build_pathname(struct archive_string *as, struct file_info *file)
1080 if (file->parent != NULL && file->parent->name[0] != '\0') {
1081 build_pathname(as, file->parent);
1082 archive_strcat(as, "/");
1084 if (file->name[0] == '\0')
1085 archive_strcat(as, ".");
1087 archive_strcat(as, file->name);
1092 dump_isodirrec(FILE *out, const unsigned char *isodirrec)
1094 fprintf(out, " l %d,",
1095 toi(isodirrec + DR_length_offset, DR_length_size));
1096 fprintf(out, " a %d,",
1097 toi(isodirrec + DR_ext_attr_length_offset, DR_ext_attr_length_size));
1098 fprintf(out, " ext 0x%x,",
1099 toi(isodirrec + DR_extent_offset, DR_extent_size));
1100 fprintf(out, " s %d,",
1101 toi(isodirrec + DR_size_offset, DR_extent_size));
1102 fprintf(out, " f 0x%02x,",
1103 toi(isodirrec + DR_flags_offset, DR_flags_size));
1104 fprintf(out, " u %d,",
1105 toi(isodirrec + DR_file_unit_size_offset, DR_file_unit_size_size));
1106 fprintf(out, " ilv %d,",
1107 toi(isodirrec + DR_interleave_offset, DR_interleave_size));
1108 fprintf(out, " seq %d,",
1109 toi(isodirrec + DR_volume_sequence_number_offset, DR_volume_sequence_number_size));
1110 fprintf(out, " nl %d:",
1111 toi(isodirrec + DR_name_len_offset, DR_name_len_size));
1112 fprintf(out, " `%.*s'",
1113 toi(isodirrec + DR_name_len_offset, DR_name_len_size), isodirrec + DR_name_offset);