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/*
* dirblock.c --- directory block routines.
*
* Copyright (C) 1995 Theodore Ts'o. This file may be redistributed
* under the terms of the GNU Public License.
*/
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <time.h>
#ifdef HAVE_ERRNO_H
#include <errno.h>
#endif
#include <linux/ext2_fs.h>
#include "ext2fs.h"
errcode_t ext2fs_read_dir_block(ext2_filsys fs, blk_t block,
void *buf)
{
errcode_t retval;
char *p, *end;
struct ext2_dir_entry *dirent;
retval = io_channel_read_blk(fs->io, block, 1, buf);
if (retval)
return retval;
if ((fs->flags & (EXT2_SWAP_BYTES|EXT2_SWAP_BYTES_READ)) == 0)
return 0;
p = buf;
end = (char *) buf + fs->blocksize;
while (p < end) {
dirent = (struct ext2_dir_entry *) p;
dirent->inode = ext2fs_swab32(dirent->inode);
dirent->rec_len = ext2fs_swab16(dirent->rec_len);
dirent->name_len = ext2fs_swab16(dirent->name_len);
p += (dirent->rec_len < 8) ? 8 : dirent->rec_len;
}
return 0;
}
errcode_t ext2fs_write_dir_block(ext2_filsys fs, blk_t block,
void *inbuf)
{
errcode_t retval;
char *p, *end, *write_buf;
char *buf = 0;
struct ext2_dir_entry *dirent;
if ((fs->flags & EXT2_SWAP_BYTES) ||
(fs->flags & EXT2_SWAP_BYTES_WRITE)) {
write_buf = buf = malloc(fs->blocksize);
if (!buf)
return ENOMEM;
memcpy(buf, inbuf, fs->blocksize);
p = buf;
end = buf + fs->blocksize;
while (p < end) {
dirent = (struct ext2_dir_entry *) p;
p += (dirent->rec_len < 8) ? 8 : dirent->rec_len;
dirent->inode = ext2fs_swab32(dirent->inode);
dirent->rec_len = ext2fs_swab16(dirent->rec_len);
dirent->name_len = ext2fs_swab16(dirent->name_len);
}
} else
write_buf = inbuf;
retval = io_channel_write_blk(fs->io, block, 1, write_buf);
if (buf)
free(buf);
return retval;
}
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