int RemoveDirentry(InodeInfo* inodeInfo, char* dirname)
{
/*
* precondition : inodeInfo != NULL, dirname != NULL
* postcondition : dirname은 삭제를 원하는 디렉토리명이며,
* inodeInfo는 dirname을 가지고 있을 것으로 추정되는 inode이다.
* 성공시 0, 실패시 -1 리턴
*/
int block = 0, index = 0;
int parent_inodeno = 0;
int current_inodeno = 0;
int ret_value = 0;
int i = 0;
InodeInfo delInodeInfo;
InodeInfo nullinode;
DirBlock dirBlock;
DirBlock nullblock;
memset(&nullinode, 0, sizeof(InodeInfo));
memset(&nullblock, 0, sizeof(DirBlock));
ReadDirBlock(&dirBlock, inodeInfo->i_block[0]);
current_inodeno = dirBlock.dirEntries[0].inodeNum;
parent_inodeno = dirBlock.dirEntries[1].inodeNum;
for ( block = 0 ; block < inodeInfo->blocks ; block++ )
{
ReadDirBlock(&dirBlock, inodeInfo->i_block[block]);
for ( index = 0 ; index < MAX_INDEX_OF_DIRBLK ; index++ )
{
if(strcmp(dirBlock.dirEntries[index].name, dirname) == 0
&& dirBlock.dirEntries[index].type == FILE_TYPE_DIR)
{// 지울 디렉토리명을 찾으면
ReadInode(&delInodeInfo, dirBlock.dirEntries[index].inodeNum);
if ( (ret_value = DirIsEmpty(&delInodeInfo)) == WRONG_VALUE )
{
fprintf(stderr, "dirname is not a DIRECTORY!\n");
fprintf(stderr, "DirIsEmpty() Error!\n");
}
if ( ret_value == TRUE )
{// 디렉토리가 비어있다. ==> 삭제
for ( i = 0 ; i < delInodeInfo.blocks ; i++ )
{
WriteDirBlock(&nullblock, delInodeInfo.i_block[i]);
SetBlockAllocToFree(delInodeInfo.i_block[i]);
}
WriteInode(&nullinode, dirBlock.dirEntries[index].inodeNum);
SetInodeAllocToFree(dirBlock.dirEntries[index].inodeNum);
dirBlock.dirEntries[index].inodeNum = 0;
strcpy(dirBlock.dirEntries[index].name, "");
// DirBlock과 InodeInfo 갱신하기
WriteDirBlock(&dirBlock, inodeInfo->i_block[block]);
return 0;
}
}
}
}
return -1;
}
/*********************************************************************************************************
** 函数名称: RemoveDir
** 功能描述: 删除目录
**
** 输 入: Path:路径名
**
** 输 出: RETURN_OK：成功
** 其它参考fat.h中关于返回值的说明
** 全局变量: 无
** 调用模块: strupr,DelFDT
********************************************************************************************************/
acoral_u8 RemoveDir(acoral_char *Path)
{
acoral_u32 ClusIndex, ClusIndex1;
acoral_u8 Drive, Rt;
acoral_char DirName[12];
FDT temp;
strupr(Path); /* 变为大写 */
ClusIndex = _GetFDTInfo(DirName, Path);
if (ClusIndex == BAD_CLUS)
{
return PATH_NOT_FIND;
}
Drive = GetDrive(Path);
/* 获取FDT其信息 */
Rt = FindFDTInfo(&temp, Drive, ClusIndex, DirName);
if (Rt == RETURN_OK)
{
/* 是否是目录 */
if ((temp.Attr & ATTR_DIRECTORY) != 0)
{
/* 是 */
ClusIndex1 = temp.FstClusLO + ((acoral_u32)(temp.FstClusHI) << 16);
/* 是否是空目录 */
Rt = DirIsEmpty(Drive, ClusIndex1);
if (Rt == DIR_EMPTY)
{
/* 是，删除 */
FATDelClusChain(Drive, ClusIndex1);
Rt = DelFDT(Drive, ClusIndex, DirName);
}
}
else
{
return PATH_NOT_FIND;
}
}
return Rt;
}
