| /* |
| * 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 |
| #include <stdlib.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 EXT2_NO_MEMORY; |
| 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; |
| } |