Re: [PATCH] ShellPkg/rm: fix hang when deleting an absolutely-empty directory An ordinary empty directory should contain "." and ".." entries. When an empty directory even doesn't contain "." or ".." entry, FileHandleFindFirstFile() may return error statu

["Carsey, Jaben" <jaben.carsey@intel.com>]

Reviewed-by: Jaben Carsey <jaben.carsey@intel.com>

> -----Original Message-----
> From: Ni, Ruiyu
> Sent: Wednesday, February 07, 2018 7:41 PM
> To: edk2-devel@lists.01.org
> Cc: Carsey, Jaben <jaben.carsey@intel.com>
> Subject: [PATCH] ShellPkg/rm: fix hang when deleting an absolutely-empty
> directory An ordinary empty directory should contain "." and ".." entries.
> When an empty directory even doesn't contain "." or ".." entry,
> FileHandleFindFirstFile() may return error status...
> Importance: High
> 
> Contributed-under: TianoCore Contribution Agreement 1.1
> Signed-off-by: Ruiyu Ni <ruiyu.ni@intel.com>
> Cc: Jaben Carsey <jaben.carsey@intel.com>
> ---
>  ShellPkg/Library/UefiShellLevel2CommandsLib/Rm.c | 7 ++++---
>  1 file changed, 4 insertions(+), 3 deletions(-)
> 
> diff --git a/ShellPkg/Library/UefiShellLevel2CommandsLib/Rm.c
> b/ShellPkg/Library/UefiShellLevel2CommandsLib/Rm.c
> index 618610d0f3..288e7666a8 100644
> --- a/ShellPkg/Library/UefiShellLevel2CommandsLib/Rm.c
> +++ b/ShellPkg/Library/UefiShellLevel2CommandsLib/Rm.c
> @@ -2,7 +2,7 @@
>    Main file for attrib shell level 2 function.
> 
>    (C) Copyright 2015 Hewlett-Packard Development Company, L.P.<BR>
> -  Copyright (c) 2009 - 2015, Intel Corporation. All rights reserved.<BR>
> +  Copyright (c) 2009 - 2018, Intel Corporation. All rights reserved.<BR>
>    This program and the accompanying materials
>    are licensed and made available under the terms and conditions of the BSD
> License
>    which accompanies this distribution.  The full text of the license may be
> found at
> @@ -33,6 +33,7 @@ IsDirectoryEmpty (
>    IN EFI_HANDLE   FileHandle
>    )
>  {
> +  EFI_STATUS      Status;
>    EFI_FILE_INFO   *FileInfo;
>    BOOLEAN         NoFile;
>    BOOLEAN         RetVal;
> @@ -41,8 +42,8 @@ IsDirectoryEmpty (
>    NoFile = FALSE;
>    FileInfo = NULL;
> 
> -  for (FileHandleFindFirstFile(FileHandle, &FileInfo)
> -    ;  !NoFile
> +  for (Status = FileHandleFindFirstFile(FileHandle, &FileInfo)
> +    ;  !NoFile && !EFI_ERROR (Status)
>      ;  FileHandleFindNextFile(FileHandle, FileInfo, &NoFile)
>     ){
>      if (StrStr(FileInfo->FileName, L".") != FileInfo->FileName
> --
> 2.16.1.windows.1