1/* vi: set sw=4 ts=4: */ 2/* 3 * newdir.c --- create a new directory block 4 * 5 * Copyright (C) 1994, 1995 Theodore Ts'o. 6 * 7 * %Begin-Header% 8 * This file may be redistributed under the terms of the GNU Public 9 * License. 10 * %End-Header% 11 */ 12 13#include <stdio.h> 14#include <string.h> 15#if HAVE_UNISTD_H 16#include <unistd.h> 17#endif 18 19#include "ext2_fs.h" 20#include "ext2fs.h" 21 22#ifndef EXT2_FT_DIR 23#define EXT2_FT_DIR 2 24#endif 25 26/* 27 * Create new directory block 28 */ 29errcode_t ext2fs_new_dir_block(ext2_filsys fs, ext2_ino_t dir_ino, 30 ext2_ino_t parent_ino, char **block) 31{ 32 struct ext2_dir_entry *dir = NULL; 33 errcode_t retval; 34 char *buf; 35 int rec_len; 36 int filetype = 0; 37 38 EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS); 39 40 retval = ext2fs_get_mem(fs->blocksize, &buf); 41 if (retval) 42 return retval; 43 memset(buf, 0, fs->blocksize); 44 dir = (struct ext2_dir_entry *) buf; 45 dir->rec_len = fs->blocksize; 46 47 if (dir_ino) { 48 if (fs->super->s_feature_incompat & 49 EXT2_FEATURE_INCOMPAT_FILETYPE) 50 filetype = EXT2_FT_DIR << 8; 51 /* 52 * Set up entry for '.' 53 */ 54 dir->inode = dir_ino; 55 dir->name_len = 1 | filetype; 56 dir->name[0] = '.'; 57 rec_len = dir->rec_len - EXT2_DIR_REC_LEN(1); 58 dir->rec_len = EXT2_DIR_REC_LEN(1); 59 60 /* 61 * Set up entry for '..' 62 */ 63 dir = (struct ext2_dir_entry *) (buf + dir->rec_len); 64 dir->rec_len = rec_len; 65 dir->inode = parent_ino; 66 dir->name_len = 2 | filetype; 67 dir->name[0] = '.'; 68 dir->name[1] = '.'; 69 70 } 71 *block = buf; 72 return 0; 73} 74