fixed to build under IPF.

Refactored some commands into FileHandleLib since they are used in many binaries.
Added .h for GUID that was missing.
Added PCD for initialization of shell apps and shell itself in shell library interaction.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@8295 6f19259b-4bc3-4df7-8a09-765794883524

ShellPkg/Include/Library/ShellLib.h

@@ -16,7 +16,6 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
 #define __SHELL_LIB__
 
 #include <Protocol/SimpleFileSystem.h>
-#include <Guid/FileInfo.h>
 #include <Protocol/EfiShell.h>
 
 /**
@@ -363,8 +362,10 @@ ShellFlushFile (
   in the directory's info. Caller can use ShellFindNextFile() to get 
   subsequent files.
 
+  Caller must use FreePool on *Buffer opon completion of all file searching.
+
   @param DirHandle              The file handle of the directory to search
-  @param Buffer                 Pointer to buffer for file's information
+  @param Buffer                 Pointer to pointer to buffer for file's information
 
   @retval EFI_SUCCESS           Found the first file.
   @retval EFI_NOT_FOUND         Cannot find the directory.
@@ -377,7 +378,7 @@ EFI_STATUS
 EFIAPI
 ShellFindFirstFile (
   IN EFI_FILE_HANDLE            DirHandle,
-  OUT EFI_FILE_INFO             *Buffer
+  OUT EFI_FILE_INFO             **Buffer
   );
 
 /**
@@ -613,6 +614,10 @@ typedef struct {
   ParamType   Type;
 } SHELL_PARAM_ITEM;
 
+
+/// Helper structure for no parameters (besides -? and -b)
+extern SHELL_PARAM_ITEM EmptyParamList[];
+
 /**
   Checks the command line arguments passed against the list of valid ones.  
   Optionally removes NULL values first.
@@ -726,4 +731,22 @@ ShellCommandLineGetRawValue (
   IN UINT32                        Position
   );
 
+/**
+  This function causes the shell library to initialize itself.  If the shell library
+  is already initialized it will de-initialize all the current protocol poitners and
+  re-populate them again.
+
+  When the library is used with PcdShellLibAutoInitialize set to true this function
+  will return EFI_SUCCESS and perform no actions.
+
+  This function is intended for internal access for shell commands only.
+
+  @retval EFI_SUCCESS   the initialization was complete sucessfully
+
+**/
+EFI_STATUS
+EFIAPI
+ShellInitialize (
+  );
+
 #endif // __SHELL_LIB__