?? newdir.c
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/* vi: set sw=4 ts=4: *//* * 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 "ext2_fs.h"#include "ext2fs.h"#ifndef EXT2_FT_DIR#define EXT2_FT_DIR 2#endif/* * Create new directory block */errcode_t ext2fs_new_dir_block(ext2_filsys fs, ext2_ino_t dir_ino, ext2_ino_t parent_ino, char **block){ struct ext2_dir_entry *dir = NULL; errcode_t retval; char *buf; int rec_len; int filetype = 0; EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS); retval = ext2fs_get_mem(fs->blocksize, &buf); if (retval) return retval; memset(buf, 0, fs->blocksize); dir = (struct ext2_dir_entry *) buf; dir->rec_len = fs->blocksize; if (dir_ino) { if (fs->super->s_feature_incompat & EXT2_FEATURE_INCOMPAT_FILETYPE) filetype = EXT2_FT_DIR << 8; /* * Set up entry for '.' */ dir->inode = dir_ino; dir->name_len = 1 | filetype; dir->name[0] = '.'; rec_len = dir->rec_len - EXT2_DIR_REC_LEN(1); dir->rec_len = EXT2_DIR_REC_LEN(1); /* * 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 | filetype; dir->name[0] = '.'; dir->name[1] = '.'; } *block = buf; return 0;}?? 快捷鍵說明
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