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- /*
- * newdir.c --- create a new directory block
- *
- * Copyright (C) 1994 Theodore Ts'o. This file may be redistributed
- * under the terms of the GNU Public License.
- */
-
- #include <stdio.h>
- #include <string.h>
- #include <unistd.h>
- #include <stdlib.h>
- #include <errno.h>
-
- #include <linux/ext2_fs.h>
-
- #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)
- {
- char *buf;
- struct ext2_dir_entry *dir = NULL;
- int rec_len;
-
- EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
-
- buf = malloc(fs->blocksize);
- if (!buf)
- return ENOMEM;
- 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;
- }
-