freebsd-skq/usr.sbin/makefs/cd9660/cd9660_write.c
pfg 7551d83c35 various: general adoption of SPDX licensing ID tags.
Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified many licenses so this was mostly a manual - error
prone - task.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.

No functional change intended.
2017-11-27 15:37:16 +00:00

515 lines
15 KiB
C

/* $NetBSD: cd9660_write.c,v 1.14 2011/01/04 09:48:21 wiz Exp $ */
/*-
* SPDX-License-Identifier: BSD-2-Clause-NetBSD
*
* 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>
__FBSDID("$FreeBSD$");
#include <util.h>
static int cd9660_write_volume_descriptors(iso9660_disk *, FILE *);
static int cd9660_write_path_table(iso9660_disk *, FILE *, off_t, int);
static int cd9660_write_path_tables(iso9660_disk *, FILE *);
static int cd9660_write_file(iso9660_disk *, FILE *, cd9660node *);
static int cd9660_write_filedata(iso9660_disk *, FILE *, off_t,
const unsigned char *, int);
#if 0
static int cd9660_write_buffered(FILE *, off_t, int, const unsigned char *);
#endif
static void cd9660_write_rr(iso9660_disk *, FILE *, cd9660node *, off_t, off_t);
/*
* 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(iso9660_disk *diskStructure, const char* image)
{
FILE *fd;
int status;
char buf[CD9660_SECTOR_SIZE];
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(diskStructure, 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(diskStructure, 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(diskStructure, 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(diskStructure, 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(diskStructure, fd);
}
/* Write padding bits. This is temporary */
memset(buf, 0, CD9660_SECTOR_SIZE);
cd9660_write_filedata(diskStructure, 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(iso9660_disk *diskStructure, FILE *fd)
{
volume_descriptor *vd_temp = diskStructure->firstVolumeDescriptor;
while (vd_temp != NULL) {
cd9660_write_filedata(diskStructure, 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(iso9660_disk *diskStructure, FILE *fd, off_t sector,
int mode)
{
int path_table_sectors = CD9660_BLOCKS(diskStructure->sectorSize,
diskStructure->pathTableLength);
unsigned char *buffer;
unsigned char *buffer_head;
int len, ret;
path_table_entry temp_entry;
cd9660node *ptcur;
buffer = ecalloc(path_table_sectors, diskStructure->sectorSize);
buffer_head = buffer;
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;
}
ret = cd9660_write_filedata(diskStructure, fd, sector, buffer_head,
path_table_sectors);
free(buffer_head);
return ret;
}
/*
* 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(iso9660_disk *diskStructure, FILE *fd)
{
if (cd9660_write_path_table(diskStructure, fd,
diskStructure->primaryLittleEndianTableSector, LITTLE_ENDIAN) == 0)
return 0;
if (cd9660_write_path_table(diskStructure, 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(iso9660_disk *diskStructure, FILE *fd, cd9660node *writenode)
{
char *buf;
char *temp_file_name;
int ret;
off_t working_sector;
int cur_sector_offset;
iso_directory_record_cd9660 temp_record;
cd9660node *temp;
int rv = 0;
/* Todo : clean up variables */
temp_file_name = ecalloc(CD9660MAXPATH + 1, 1);
buf = emalloc(diskStructure->sectorSize);
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;
if (writenode->node->contents == NULL)
cd9660_compute_full_filename(writenode,
temp_file_name);
ret = cd9660_copy_file(diskStructure, fd,
writenode->fileDataSector,
(writenode->node->contents != NULL) ?
writenode->node->contents : temp_file_name);
if (ret == 0)
goto out;
}
} else {
/*
* Here is a new revelation that ECMA didn't explain
* (at least not well).
* ALL . and .. records store the name "\0" and "\1"
* respectively. 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;
if (fseeko(fd, working_sector * diskStructure->sectorSize,
SEEK_SET) == -1)
err(1, "fseeko");
/*
* 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(diskStructure, temp);
if (temp_record.length[0] + cur_sector_offset >=
diskStructure->sectorSize) {
cur_sector_offset = 0;
working_sector++;
/* Seek to the next sector. */
if (fseeko(fd, working_sector *
diskStructure->sectorSize, SEEK_SET) == -1)
err(1, "fseeko");
}
/* Write out the basic ISO directory record */
(void)fwrite(&temp_record, 1,
temp->isoDirRecord->length[0], fd);
if (diskStructure->rock_ridge_enabled) {
cd9660_write_rr(diskStructure, fd, temp,
cur_sector_offset, working_sector);
}
if (fseeko(fd, working_sector *
diskStructure->sectorSize + cur_sector_offset +
temp_record.length[0] - temp->su_tail_size,
SEEK_SET) == -1)
err(1, "fseeko");
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(diskStructure, 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(iso9660_disk *diskStructure, FILE *fd, off_t sector,
const unsigned char *buf, int numsecs)
{
off_t curpos;
size_t success;
curpos = ftello(fd);
if (fseeko(fd, sector * diskStructure->sectorSize, SEEK_SET) == -1)
err(1, "fseeko");
success = fwrite(buf, diskStructure->sectorSize * numsecs, 1, fd);
if (fseeko(fd, curpos, SEEK_SET) == -1)
err(1, "fseeko");
if (success == 1)
success = diskStructure->sectorSize * numsecs;
return success;
}
#if 0
static int
cd9660_write_buffered(FILE *fd, off_t offset, int buff_len,
const unsigned char* buffer)
{
static int working_sector = -1;
static char buf[CD9660_SECTOR_SIZE];
return 0;
}
#endif
int
cd9660_copy_file(iso9660_disk *diskStructure, FILE *fd, off_t start_sector,
const char *filename)
{
FILE *rf;
int bytes_read;
off_t sector = start_sector;
int buf_size = diskStructure->sectorSize;
char *buf;
buf = emalloc(buf_size);
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);
if (fseeko(fd, start_sector * diskStructure->sectorSize, SEEK_SET) == -1)
err(1, "fseeko");
while (!feof(rf)) {
bytes_read = fread(buf,1,buf_size,rf);
if (ferror(rf)) {
warn("%s: fread", __func__);
free(buf);
(void)fclose(rf);
return 0;
}
fwrite(buf,1,bytes_read,fd);
if (ferror(fd)) {
warn("%s: fwrite", __func__);
free(buf);
(void)fclose(rf);
return 0;
}
sector++;
}
fclose(rf);
free(buf);
return 1;
}
static void
cd9660_write_rr(iso9660_disk *diskStructure, FILE *fd, cd9660node *writenode,
off_t offset, off_t sector)
{
int in_ca = 0;
struct ISO_SUSP_ATTRIBUTES *myattr;
offset += writenode->isoDirRecord->length[0];
if (fseeko(fd, sector * diskStructure->sectorSize + offset, SEEK_SET) ==
-1)
err(1, "fseeko");
/* 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
*/
if (fseeko(fd, ((off_t)diskStructure->
susp_continuation_area_start_sector *
diskStructure->sectorSize)
+ writenode->susp_entry_ce_start,
SEEK_SET) == -1)
err(1, "fseeko");
in_ca = 1;
}
}
}
/*
* If we had to go to the continuation area, head back to
* where we should be.
*/
if (in_ca)
if (fseeko(fd, sector * diskStructure->sectorSize + offset,
SEEK_SET) == -1)
err(1, "fseeko");
}