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/*
* newdir.c --- create a new directory block
*
* Copyright (C) 1994, 1995 Theodore Ts'o.
*
* %Begin-Header%
* This file may be redistributed under the terms of the GNU Public
* License.
* %End-Header%
*/
#include <stdio.h>
#include <string.h>
#if HAVE_UNISTD_H
#include <unistd.h>
#endif
#if EXT2_FLAT_INCLUDES
#include "ext2_fs.h"
#else
#include <linux/ext2_fs.h>
#endif
#include "ext2fs.h"
/*
* Create new directory block
*/
errcode_t ext2fs_new_dir_block(ext2_filsys fs, ino_t dir_ino, ino_t parent_ino,
char **block)
{
struct ext2_dir_entry *dir = NULL;
errcode_t retval;
char *buf;
int rec_len;
EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
retval = ext2fs_get_mem(fs->blocksize, (void **) &buf);
if (retval)
return retval;
memset(buf, 0, fs->blocksize);
dir = (struct ext2_dir_entry *) buf;
dir->rec_len = fs->blocksize;
if (dir_ino) {
/*
* Set up entry for '.'
*/
dir->inode = dir_ino;
dir->name_len = 1;
dir->name[0] = '.';
rec_len = dir->rec_len - EXT2_DIR_REC_LEN(dir->name_len);
dir->rec_len = EXT2_DIR_REC_LEN(dir->name_len);
/*
* Set up entry for '..'
*/
dir = (struct ext2_dir_entry *) (buf + dir->rec_len);
dir->rec_len = rec_len;
dir->inode = parent_ino;
dir->name_len = 2;
dir->name[0] = '.';
dir->name[1] = '.';
}
*block = buf;
return 0;
}
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