NetBSD-5.0.2/usr.sbin/makefs/cd9660/cd9660_write.c
/* $NetBSD: cd9660_write.c,v 1.9.6.1 2010/01/02 06:34:15 snj Exp $ */
/*
* Copyright (c) 2005 Daniel Watt, Walter Deignan, Ryan Gabrys, Alan
* Perez-Rathke and Ram Vedam. All rights reserved.
*
* This code was written by Daniel Watt, Walter Deignan, Ryan Gabrys,
* Alan Perez-Rathke and Ram Vedam.
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY DANIEL WATT, WALTER DEIGNAN, RYAN
* GABRYS, ALAN PEREZ-RATHKE AND RAM VEDAM ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL DANIEL WATT, WALTER DEIGNAN, RYAN
* GABRYS, ALAN PEREZ-RATHKE AND RAM VEDAM BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE,DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*/
#include "cd9660.h"
#include "iso9660_rrip.h"
#include <sys/cdefs.h>
#if defined(__RCSID) && !defined(__lint)
__RCSID("$NetBSD: cd9660_write.c,v 1.9.6.1 2010/01/02 06:34:15 snj Exp $");
#endif /* !__lint */
static int cd9660_write_volume_descriptors(FILE *);
static int cd9660_write_path_table(FILE *, int, int);
static int cd9660_write_path_tables(FILE *);
static int cd9660_write_file(FILE *, cd9660node *);
static int cd9660_write_filedata(FILE *, int, const unsigned char *, int);
#if 0
static int cd9660_write_buffered(FILE *, int, int, const unsigned char*);
#endif
static void cd9660_write_rr(FILE *, cd9660node *, int, int);
/*
* Write the image
* Writes the entire image
* @param const char* The filename for the image
* @returns int 1 on success, 0 on failure
*/
int
cd9660_write_image(const char* image)
{
FILE *fd;
int status;
char buf[2048];
if ((fd = fopen(image, "w+")) == NULL) {
err(EXIT_FAILURE, "%s: Can't open `%s' for writing", __func__,
image);
}
if (diskStructure.verbose_level > 0)
printf("Writing image\n");
if (diskStructure.has_generic_bootimage) {
status = cd9660_copy_file(fd, 0,
diskStructure.generic_bootimage);
if (status == 0) {
warnx("%s: Error writing generic boot image",
__func__);
goto cleanup_bad_image;
}
}
/* Write the volume descriptors */
status = cd9660_write_volume_descriptors(fd);
if (status == 0) {
warnx("%s: Error writing volume descriptors to image",
__func__);
goto cleanup_bad_image;
}
if (diskStructure.verbose_level > 0)
printf("Volume descriptors written\n");
/*
* Write the path tables: there are actually four, but right
* now we are only concearned with two.
*/
status = cd9660_write_path_tables(fd);
if (status == 0) {
warnx("%s: Error writing path tables to image", __func__);
goto cleanup_bad_image;
}
if (diskStructure.verbose_level > 0)
printf("Path tables written\n");
/* Write the directories and files */
status = cd9660_write_file(fd, diskStructure.rootNode);
if (status == 0) {
warnx("%s: Error writing files to image", __func__);
goto cleanup_bad_image;
}
if (diskStructure.is_bootable) {
cd9660_write_boot(fd);
}
/* Write padding bits. This is temporary */
memset(buf, 0, 2048);
cd9660_write_filedata(fd, diskStructure.totalSectors - 1, buf, 1);
if (diskStructure.verbose_level > 0)
printf("Files written\n");
fclose(fd);
if (diskStructure.verbose_level > 0)
printf("Image closed\n");
return 1;
cleanup_bad_image:
fclose(fd);
if (!diskStructure.keep_bad_images)
unlink(image);
if (diskStructure.verbose_level > 0)
printf("Bad image cleaned up\n");
return 0;
}
static int
cd9660_write_volume_descriptors(FILE *fd)
{
volume_descriptor *vd_temp = diskStructure.firstVolumeDescriptor;
int pos;
while (vd_temp != NULL) {
pos = vd_temp->sector*diskStructure.sectorSize;
cd9660_write_filedata(fd, vd_temp->sector,
vd_temp->volumeDescriptorData, 1);
vd_temp = vd_temp->next;
}
return 1;
}
/*
* Write out an individual path table
* Used just to keep redundant code to a minimum
* @param FILE *fd Valid file pointer
* @param int Sector to start writing path table to
* @param int Endian mode : BIG_ENDIAN or LITTLE_ENDIAN
* @returns int 1 on success, 0 on failure
*/
static int
cd9660_write_path_table(FILE *fd, int sector, int mode)
{
int path_table_sectors = CD9660_BLOCKS(diskStructure.sectorSize,
diskStructure.pathTableLength);
unsigned char *buffer;
unsigned char *buffer_head;
int len;
path_table_entry temp_entry;
cd9660node *ptcur;
buffer = malloc(diskStructure.sectorSize * path_table_sectors);
if (buffer == NULL) {
warnx("%s: Memory allocation error allocating buffer",
__func__);
return 0;
}
buffer_head = buffer;
memset(buffer, 0, diskStructure.sectorSize * path_table_sectors);
ptcur = diskStructure.rootNode;
while (ptcur != NULL) {
memset(&temp_entry, 0, sizeof(path_table_entry));
temp_entry.length[0] = ptcur->isoDirRecord->name_len[0];
temp_entry.extended_attribute_length[0] =
ptcur->isoDirRecord->ext_attr_length[0];
memcpy(temp_entry.name, ptcur->isoDirRecord->name,
temp_entry.length[0] + 1);
/* round up */
len = temp_entry.length[0] + 8 + (temp_entry.length[0] & 0x01);
/* todo: function pointers instead */
if (mode == LITTLE_ENDIAN) {
cd9660_731(ptcur->fileDataSector,
temp_entry.first_sector);
cd9660_721((ptcur->parent == NULL ?
1 : ptcur->parent->ptnumber),
temp_entry.parent_number);
} else {
cd9660_732(ptcur->fileDataSector,
temp_entry.first_sector);
cd9660_722((ptcur->parent == NULL ?
1 : ptcur->parent->ptnumber),
temp_entry.parent_number);
}
memcpy(buffer, &temp_entry, len);
buffer += len;
ptcur = ptcur->ptnext;
}
return cd9660_write_filedata(fd, sector, buffer_head,
path_table_sectors);
}
/*
* Write out the path tables to disk
* Each file descriptor should be pointed to by the PVD, so we know which
* sector to copy them to. One thing to watch out for: the only path tables
* stored are in the endian mode that the application is compiled for. So,
* the first thing to do is write out that path table, then to write the one
* in the other endian mode requires to convert the endianness of each entry
* in the table. The best way to do this would be to create a temporary
* path_table_entry structure, then for each path table entry, copy it to
* the temporary entry, translate, then copy that to disk.
*
* @param FILE* Valid file descriptor
* @returns int 0 on failure, 1 on success
*/
static int
cd9660_write_path_tables(FILE *fd)
{
if (cd9660_write_path_table(fd,
diskStructure.primaryLittleEndianTableSector, LITTLE_ENDIAN) == 0)
return 0;
if (cd9660_write_path_table(fd,
diskStructure.primaryBigEndianTableSector, BIG_ENDIAN) == 0)
return 0;
/* @TODO: handle remaining two path tables */
return 1;
}
/*
* Write a file to disk
* Writes a file, its directory record, and its data to disk
* This file is designed to be called RECURSIVELY, so initially call it
* with the root node. All of the records should store what sector the
* file goes in, so no computation should be necessary.
*
* @param int fd Valid file descriptor
* @param struct cd9660node* writenode Pointer to the file to be written
* @returns int 0 on failure, 1 on success
*/
static int
cd9660_write_file(FILE *fd, cd9660node *writenode)
{
char *buf;
char *temp_file_name;
int ret;
int working_sector;
int cur_sector_offset;
int written;
iso_directory_record_cd9660 temp_record;
cd9660node *temp;
int rv = 0;
/* Todo : clean up variables */
temp_file_name = malloc(CD9660MAXPATH + 1);
if (temp_file_name == NULL)
err(EXIT_FAILURE, "%s: malloc", __func__);
memset(temp_file_name, 0, CD9660MAXPATH + 1);
buf = malloc(diskStructure.sectorSize);
if (buf == NULL)
err(EXIT_FAILURE, "%s: malloc", __func__);
if ((writenode->level != 0) &&
!(writenode->node->type & S_IFDIR)) {
fsinode *inode = writenode->node->inode;
/* Only attempt to write unwritten files that have length. */
if ((inode->flags & FI_WRITTEN) != 0) {
INODE_WARNX(("%s: skipping written inode %d", __func__,
(int)inode->st.st_ino));
} else if (writenode->fileDataLength > 0) {
INODE_WARNX(("%s: writing inode %d blocks at %" PRIu32,
__func__, (int)inode->st.st_ino, inode->ino));
inode->flags |= FI_WRITTEN;
cd9660_compute_full_filename(writenode,
temp_file_name, 0);
ret = cd9660_copy_file(fd, writenode->fileDataSector,
temp_file_name);
if (ret == 0)
goto out;
}
} else {
/*
* Here is a new revelation that ECMA didnt explain
* (at least not well).
* ALL . and .. records store the name "\0" and "\1"
* resepctively. So, for each directory, we have to
* make a new node.
*
* This is where it gets kinda messy, since we have to
* be careful of sector boundaries
*/
cur_sector_offset = 0;
working_sector = writenode->fileDataSector;
fseek(fd, working_sector * diskStructure.sectorSize, SEEK_SET);
/*
* Now loop over children, writing out their directory
* records - beware of sector boundaries
*/
TAILQ_FOREACH(temp, &writenode->cn_children, cn_next_child) {
/*
* Copy the temporary record and adjust its size
* if necessary
*/
memcpy(&temp_record, temp->isoDirRecord,
sizeof(iso_directory_record_cd9660));
temp_record.length[0] =
cd9660_compute_record_size(temp);
if (temp_record.length[0] + cur_sector_offset >=
diskStructure.sectorSize) {
cur_sector_offset = 0;
working_sector++;
/* Seek to the next sector. */
fseek(fd,
working_sector * diskStructure.sectorSize,
SEEK_SET);
}
/* Write out the basic ISO directory record */
written = fwrite(&temp_record, 1,
temp->isoDirRecord->length[0], fd);
if (diskStructure.rock_ridge_enabled) {
cd9660_write_rr(fd, temp,
cur_sector_offset, working_sector);
}
fseek(fd,
working_sector * diskStructure.sectorSize +
cur_sector_offset + temp_record.length[0] -
temp->su_tail_size,
SEEK_SET);
if (temp->su_tail_size > 0)
fwrite(temp->su_tail_data, 1,
temp->su_tail_size, fd);
if (ferror(fd)) {
warnx("%s: write error", __func__);
goto out;
}
cur_sector_offset += temp_record.length[0];
}
/*
* Recurse on children.
*/
TAILQ_FOREACH(temp, &writenode->cn_children, cn_next_child) {
if ((ret = cd9660_write_file(fd, temp)) == 0)
goto out;
}
}
rv = 1;
out:
free(temp_file_name);
free(buf);
return rv;
}
/*
* Wrapper function to write a buffer (one sector) to disk.
* Seeks and writes the buffer.
* NOTE: You dont NEED to use this function, but it might make your
* life easier if you have to write things that align to a sector
* (such as volume descriptors).
*
* @param int fd Valid file descriptor
* @param int sector Sector number to write to
* @param const unsigned char* Buffer to write. This should be the
* size of a sector, and if only a portion
* is written, the rest should be set to 0.
*/
static int
cd9660_write_filedata(FILE *fd, int sector, const unsigned char *buf,
int numsecs)
{
off_t curpos;
size_t success;
curpos = ftello(fd);
fseek(fd, sector * diskStructure.sectorSize, SEEK_SET);
success = fwrite(buf, diskStructure.sectorSize * numsecs, 1, fd);
fseek(fd, curpos, SEEK_SET);
if (success == 1)
success = diskStructure.sectorSize * numsecs;
return success;
}
#if 0
static int
cd9660_write_buffered(FILE *fd, int offset, int buff_len,
const unsigned char* buffer)
{
static int working_sector = -1;
static char buf[2048];
return 0;
}
#endif
int
cd9660_copy_file(FILE *fd, int start_sector, const char *filename)
{
FILE *rf;
int bytes_read;
int sector = start_sector;
int buf_size = diskStructure.sectorSize;
char *buf;
buf = malloc(buf_size);
if (buf == NULL)
err(EXIT_FAILURE, "%s: malloc", __func__);
if ((rf = fopen(filename, "rb")) == NULL) {
warn("%s: cannot open %s", __func__, filename);
free(buf);
return 0;
}
if (diskStructure.verbose_level > 1)
printf("Writing file: %s\n",filename);
fseek(fd, start_sector * diskStructure.sectorSize, SEEK_SET);
while (!feof(rf)) {
bytes_read = fread(buf,1,buf_size,rf);
if (ferror(rf)) {
warn("%s: fread", __func__);
free(buf);
return 0;
}
fwrite(buf,1,bytes_read,fd);
if (ferror(fd)) {
warn("%s: fwrite", __func__);
free(buf);
return 0;
}
sector++;
}
fclose(rf);
free(buf);
return 1;
}
static void
cd9660_write_rr(FILE *fd, cd9660node *writenode, int offset, int sector)
{
int in_ca = 0;
struct ISO_SUSP_ATTRIBUTES *myattr;
offset += writenode->isoDirRecord->length[0];
fseek(fd, sector * diskStructure.sectorSize + offset, SEEK_SET);
/* Offset now points at the end of the record */
TAILQ_FOREACH(myattr, &writenode->head, rr_ll) {
fwrite(&(myattr->attr), CD9660_SUSP_ENTRY_SIZE(myattr), 1, fd);
if (!in_ca) {
offset += CD9660_SUSP_ENTRY_SIZE(myattr);
if (myattr->last_in_suf) {
/*
* Point the offset to the start of this
* record's CE area
*/
fseek(fd, (diskStructure.
susp_continuation_area_start_sector *
diskStructure.sectorSize)
+ writenode->susp_entry_ce_start,
SEEK_SET);
in_ca = 1;
}
}
}
/*
* If we had to go the the continuation area, head back to
* where we should be.
*/
if (in_ca)
fseek(fd, sector * diskStructure.sectorSize + offset, SEEK_SET);
}