1 /* $NetBSD: cd9660_write.c,v 1.14 2011/01/04 09:48:21 wiz Exp $ */
4 * Copyright (c) 2005 Daniel Watt, Walter Deignan, Ryan Gabrys, Alan
5 * Perez-Rathke and Ram Vedam. All rights reserved.
7 * This code was written by Daniel Watt, Walter Deignan, Ryan Gabrys,
8 * Alan Perez-Rathke and Ram Vedam.
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above
16 * copyright notice, this list of conditions and the following
17 * disclaimer in the documentation and/or other materials provided
18 * with the distribution.
20 * THIS SOFTWARE IS PROVIDED BY DANIEL WATT, WALTER DEIGNAN, RYAN
21 * GABRYS, ALAN PEREZ-RATHKE AND RAM VEDAM ``AS IS'' AND ANY EXPRESS OR
22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
24 * DISCLAIMED. IN NO EVENT SHALL DANIEL WATT, WALTER DEIGNAN, RYAN
25 * GABRYS, ALAN PEREZ-RATHKE AND RAM VEDAM BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
28 * USE,DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
29 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
36 #include "iso9660_rrip.h"
38 #include <sys/cdefs.h>
39 __FBSDID("$FreeBSD$");
41 static int cd9660_write_volume_descriptors(FILE *);
42 static int cd9660_write_path_table(FILE *, off_t, int);
43 static int cd9660_write_path_tables(FILE *);
44 static int cd9660_write_file(FILE *, cd9660node *);
45 static int cd9660_write_filedata(FILE *, off_t, const unsigned char *, int);
47 static int cd9660_write_buffered(FILE *, off_t, int, const unsigned char *);
49 static void cd9660_write_rr(FILE *, cd9660node *, off_t, off_t);
53 * Writes the entire image
54 * @param const char* The filename for the image
55 * @returns int 1 on success, 0 on failure
58 cd9660_write_image(const char* image)
62 char buf[CD9660_SECTOR_SIZE];
64 if ((fd = fopen(image, "w+")) == NULL) {
65 err(EXIT_FAILURE, "%s: Can't open `%s' for writing", __func__,
69 if (diskStructure.verbose_level > 0)
70 printf("Writing image\n");
72 if (diskStructure.has_generic_bootimage) {
73 status = cd9660_copy_file(fd, 0,
74 diskStructure.generic_bootimage);
76 warnx("%s: Error writing generic boot image",
78 goto cleanup_bad_image;
82 /* Write the volume descriptors */
83 status = cd9660_write_volume_descriptors(fd);
85 warnx("%s: Error writing volume descriptors to image",
87 goto cleanup_bad_image;
90 if (diskStructure.verbose_level > 0)
91 printf("Volume descriptors written\n");
94 * Write the path tables: there are actually four, but right
95 * now we are only concearned with two.
97 status = cd9660_write_path_tables(fd);
99 warnx("%s: Error writing path tables to image", __func__);
100 goto cleanup_bad_image;
103 if (diskStructure.verbose_level > 0)
104 printf("Path tables written\n");
106 /* Write the directories and files */
107 status = cd9660_write_file(fd, diskStructure.rootNode);
109 warnx("%s: Error writing files to image", __func__);
110 goto cleanup_bad_image;
113 if (diskStructure.is_bootable) {
114 cd9660_write_boot(fd);
117 /* Write padding bits. This is temporary */
118 memset(buf, 0, CD9660_SECTOR_SIZE);
119 cd9660_write_filedata(fd, diskStructure.totalSectors - 1, buf, 1);
121 if (diskStructure.verbose_level > 0)
122 printf("Files written\n");
125 if (diskStructure.verbose_level > 0)
126 printf("Image closed\n");
131 if (!diskStructure.keep_bad_images)
133 if (diskStructure.verbose_level > 0)
134 printf("Bad image cleaned up\n");
139 cd9660_write_volume_descriptors(FILE *fd)
141 volume_descriptor *vd_temp = diskStructure.firstVolumeDescriptor;
144 while (vd_temp != NULL) {
145 pos = vd_temp->sector * diskStructure.sectorSize;
146 cd9660_write_filedata(fd, vd_temp->sector,
147 vd_temp->volumeDescriptorData, 1);
148 vd_temp = vd_temp->next;
154 * Write out an individual path table
155 * Used just to keep redundant code to a minimum
156 * @param FILE *fd Valid file pointer
157 * @param int Sector to start writing path table to
158 * @param int Endian mode : BIG_ENDIAN or LITTLE_ENDIAN
159 * @returns int 1 on success, 0 on failure
162 cd9660_write_path_table(FILE *fd, off_t sector, int mode)
164 int path_table_sectors = CD9660_BLOCKS(diskStructure.sectorSize,
165 diskStructure.pathTableLength);
166 unsigned char *buffer;
167 unsigned char *buffer_head;
169 path_table_entry temp_entry;
172 buffer = malloc(diskStructure.sectorSize * path_table_sectors);
173 if (buffer == NULL) {
174 warnx("%s: Memory allocation error allocating buffer",
178 buffer_head = buffer;
179 memset(buffer, 0, diskStructure.sectorSize * path_table_sectors);
181 ptcur = diskStructure.rootNode;
183 while (ptcur != NULL) {
184 memset(&temp_entry, 0, sizeof(path_table_entry));
185 temp_entry.length[0] = ptcur->isoDirRecord->name_len[0];
186 temp_entry.extended_attribute_length[0] =
187 ptcur->isoDirRecord->ext_attr_length[0];
188 memcpy(temp_entry.name, ptcur->isoDirRecord->name,
189 temp_entry.length[0] + 1);
192 len = temp_entry.length[0] + 8 + (temp_entry.length[0] & 0x01);
194 /* todo: function pointers instead */
195 if (mode == LITTLE_ENDIAN) {
196 cd9660_731(ptcur->fileDataSector,
197 temp_entry.first_sector);
198 cd9660_721((ptcur->parent == NULL ?
199 1 : ptcur->parent->ptnumber),
200 temp_entry.parent_number);
202 cd9660_732(ptcur->fileDataSector,
203 temp_entry.first_sector);
204 cd9660_722((ptcur->parent == NULL ?
205 1 : ptcur->parent->ptnumber),
206 temp_entry.parent_number);
210 memcpy(buffer, &temp_entry, len);
213 ptcur = ptcur->ptnext;
216 return cd9660_write_filedata(fd, sector, buffer_head,
222 * Write out the path tables to disk
223 * Each file descriptor should be pointed to by the PVD, so we know which
224 * sector to copy them to. One thing to watch out for: the only path tables
225 * stored are in the endian mode that the application is compiled for. So,
226 * the first thing to do is write out that path table, then to write the one
227 * in the other endian mode requires to convert the endianness of each entry
228 * in the table. The best way to do this would be to create a temporary
229 * path_table_entry structure, then for each path table entry, copy it to
230 * the temporary entry, translate, then copy that to disk.
232 * @param FILE* Valid file descriptor
233 * @returns int 0 on failure, 1 on success
236 cd9660_write_path_tables(FILE *fd)
238 if (cd9660_write_path_table(fd,
239 diskStructure.primaryLittleEndianTableSector, LITTLE_ENDIAN) == 0)
242 if (cd9660_write_path_table(fd,
243 diskStructure.primaryBigEndianTableSector, BIG_ENDIAN) == 0)
246 /* @TODO: handle remaining two path tables */
251 * Write a file to disk
252 * Writes a file, its directory record, and its data to disk
253 * This file is designed to be called RECURSIVELY, so initially call it
254 * with the root node. All of the records should store what sector the
255 * file goes in, so no computation should be necessary.
257 * @param int fd Valid file descriptor
258 * @param struct cd9660node* writenode Pointer to the file to be written
259 * @returns int 0 on failure, 1 on success
262 cd9660_write_file(FILE *fd, cd9660node *writenode)
265 char *temp_file_name;
267 off_t working_sector;
268 int cur_sector_offset;
270 iso_directory_record_cd9660 temp_record;
274 /* Todo : clean up variables */
276 temp_file_name = malloc(CD9660MAXPATH + 1);
277 if (temp_file_name == NULL)
278 err(EXIT_FAILURE, "%s: malloc", __func__);
280 memset(temp_file_name, 0, CD9660MAXPATH + 1);
282 buf = malloc(diskStructure.sectorSize);
284 err(EXIT_FAILURE, "%s: malloc", __func__);
286 if ((writenode->level != 0) &&
287 !(writenode->node->type & S_IFDIR)) {
288 fsinode *inode = writenode->node->inode;
289 /* Only attempt to write unwritten files that have length. */
290 if ((inode->flags & FI_WRITTEN) != 0) {
291 INODE_WARNX(("%s: skipping written inode %d", __func__,
292 (int)inode->st.st_ino));
293 } else if (writenode->fileDataLength > 0) {
294 INODE_WARNX(("%s: writing inode %d blocks at %" PRIu32,
295 __func__, (int)inode->st.st_ino, inode->ino));
296 inode->flags |= FI_WRITTEN;
297 if (writenode->node->contents == NULL)
298 cd9660_compute_full_filename(writenode,
300 ret = cd9660_copy_file(fd, writenode->fileDataSector,
301 (writenode->node->contents != NULL) ?
302 writenode->node->contents : temp_file_name);
308 * Here is a new revelation that ECMA didn't explain
309 * (at least not well).
310 * ALL . and .. records store the name "\0" and "\1"
311 * respectively. So, for each directory, we have to
314 * This is where it gets kinda messy, since we have to
315 * be careful of sector boundaries
317 cur_sector_offset = 0;
318 working_sector = writenode->fileDataSector;
319 if (fseeko(fd, working_sector * diskStructure.sectorSize,
324 * Now loop over children, writing out their directory
325 * records - beware of sector boundaries
327 TAILQ_FOREACH(temp, &writenode->cn_children, cn_next_child) {
329 * Copy the temporary record and adjust its size
332 memcpy(&temp_record, temp->isoDirRecord,
333 sizeof(iso_directory_record_cd9660));
335 temp_record.length[0] =
336 cd9660_compute_record_size(temp);
338 if (temp_record.length[0] + cur_sector_offset >=
339 diskStructure.sectorSize) {
340 cur_sector_offset = 0;
343 /* Seek to the next sector. */
344 if (fseeko(fd, working_sector *
345 diskStructure.sectorSize, SEEK_SET) == -1)
348 /* Write out the basic ISO directory record */
349 written = fwrite(&temp_record, 1,
350 temp->isoDirRecord->length[0], fd);
351 if (diskStructure.rock_ridge_enabled) {
352 cd9660_write_rr(fd, temp,
353 cur_sector_offset, working_sector);
355 if (fseeko(fd, working_sector *
356 diskStructure.sectorSize + cur_sector_offset +
357 temp_record.length[0] - temp->su_tail_size,
360 if (temp->su_tail_size > 0)
361 fwrite(temp->su_tail_data, 1,
362 temp->su_tail_size, fd);
364 warnx("%s: write error", __func__);
367 cur_sector_offset += temp_record.length[0];
372 * Recurse on children.
374 TAILQ_FOREACH(temp, &writenode->cn_children, cn_next_child) {
375 if ((ret = cd9660_write_file(fd, temp)) == 0)
381 free(temp_file_name);
387 * Wrapper function to write a buffer (one sector) to disk.
388 * Seeks and writes the buffer.
389 * NOTE: You dont NEED to use this function, but it might make your
390 * life easier if you have to write things that align to a sector
391 * (such as volume descriptors).
393 * @param int fd Valid file descriptor
394 * @param int sector Sector number to write to
395 * @param const unsigned char* Buffer to write. This should be the
396 * size of a sector, and if only a portion
397 * is written, the rest should be set to 0.
400 cd9660_write_filedata(FILE *fd, off_t sector, const unsigned char *buf,
408 if (fseeko(fd, sector * diskStructure.sectorSize, SEEK_SET) == -1)
411 success = fwrite(buf, diskStructure.sectorSize * numsecs, 1, fd);
413 if (fseeko(fd, curpos, SEEK_SET) == -1)
417 success = diskStructure.sectorSize * numsecs;
423 cd9660_write_buffered(FILE *fd, off_t offset, int buff_len,
424 const unsigned char* buffer)
426 static int working_sector = -1;
427 static char buf[CD9660_SECTOR_SIZE];
434 cd9660_copy_file(FILE *fd, off_t start_sector, const char *filename)
438 off_t sector = start_sector;
439 int buf_size = diskStructure.sectorSize;
442 buf = malloc(buf_size);
444 err(EXIT_FAILURE, "%s: malloc", __func__);
446 if ((rf = fopen(filename, "rb")) == NULL) {
447 warn("%s: cannot open %s", __func__, filename);
452 if (diskStructure.verbose_level > 1)
453 printf("Writing file: %s\n",filename);
455 if (fseeko(fd, start_sector * diskStructure.sectorSize, SEEK_SET) == -1)
459 bytes_read = fread(buf,1,buf_size,rf);
461 warn("%s: fread", __func__);
467 fwrite(buf,1,bytes_read,fd);
469 warn("%s: fwrite", __func__);
483 cd9660_write_rr(FILE *fd, cd9660node *writenode, off_t offset, off_t sector)
486 struct ISO_SUSP_ATTRIBUTES *myattr;
488 offset += writenode->isoDirRecord->length[0];
489 if (fseeko(fd, sector * diskStructure.sectorSize + offset, SEEK_SET) ==
492 /* Offset now points at the end of the record */
493 TAILQ_FOREACH(myattr, &writenode->head, rr_ll) {
494 fwrite(&(myattr->attr), CD9660_SUSP_ENTRY_SIZE(myattr), 1, fd);
497 offset += CD9660_SUSP_ENTRY_SIZE(myattr);
498 if (myattr->last_in_suf) {
500 * Point the offset to the start of this
503 if (fseeko(fd, ((off_t)diskStructure.
504 susp_continuation_area_start_sector *
505 diskStructure.sectorSize)
506 + writenode->susp_entry_ce_start,
515 * If we had to go to the continuation area, head back to
516 * where we should be.
519 if (fseeko(fd, sector * diskStructure.sectorSize + offset,