mirror of
https://github.com/CloverHackyColor/CloverBootloader.git
synced 2024-11-24 11:45:27 +01:00
137 lines
2.8 KiB
C
137 lines
2.8 KiB
C
/*++
|
|
|
|
Copyright (c) 2005 - 2013, Intel Corporation. All rights reserved.<BR>
|
|
This program and the accompanying materials
|
|
are licensed and made available under the terms and conditions of the Software
|
|
License Agreement which accompanies this distribution.
|
|
|
|
|
|
Module Name:
|
|
|
|
delete.c
|
|
|
|
Abstract:
|
|
|
|
Function that deletes a file
|
|
|
|
Revision History
|
|
|
|
--*/
|
|
|
|
#include "Fat.h"
|
|
|
|
EFI_STATUS
|
|
EFIAPI
|
|
FatDelete (
|
|
IN EFI_FILE_PROTOCOL *FHand
|
|
)
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
Deletes the file & Closes the file handle.
|
|
|
|
Arguments:
|
|
|
|
FHand - Handle to the file to delete.
|
|
|
|
Returns:
|
|
|
|
EFI_SUCCESS - Delete the file successfully.
|
|
EFI_WARN_DELETE_FAILURE - Fail to delete the file.
|
|
|
|
--*/
|
|
{
|
|
FAT_IFILE *IFile;
|
|
FAT_OFILE *OFile;
|
|
FAT_DIRENT *DirEnt;
|
|
EFI_STATUS Status;
|
|
UINTN Round;
|
|
|
|
IFile = IFILE_FROM_FHAND (FHand);
|
|
OFile = IFile->OFile;
|
|
|
|
FatWaitNonblockingTask (IFile);
|
|
|
|
//
|
|
// Lock the volume
|
|
//
|
|
FatAcquireLock ();
|
|
|
|
//
|
|
// If the file is read-only, then don't delete it
|
|
//
|
|
if (IFile->ReadOnly) {
|
|
Status = EFI_WRITE_PROTECTED;
|
|
goto Done;
|
|
}
|
|
//
|
|
// If the file is the root dir, then don't delete it
|
|
//
|
|
if (OFile->Parent == NULL) {
|
|
Status = EFI_ACCESS_DENIED;
|
|
goto Done;
|
|
}
|
|
//
|
|
// If the file has a permanant error, skip the delete
|
|
//
|
|
Status = OFile->Error;
|
|
if (!EFI_ERROR (Status)) {
|
|
//
|
|
// If this is a directory, make sure it's empty before
|
|
// allowing it to be deleted
|
|
//
|
|
if (OFile->ODir != NULL) {
|
|
//
|
|
// We do not allow to delete nonempty directory
|
|
//
|
|
FatResetODirCursor (OFile);
|
|
for (Round = 0; Round < 3; Round++) {
|
|
Status = FatGetNextDirEnt (OFile, &DirEnt);
|
|
if ((EFI_ERROR (Status)) ||
|
|
((Round < 2) && (DirEnt == NULL || !FatIsDotDirEnt (DirEnt))) ||
|
|
((Round == 2) && (DirEnt != NULL))
|
|
) {
|
|
Status = EFI_ACCESS_DENIED;
|
|
goto Done;
|
|
}
|
|
}
|
|
}
|
|
//
|
|
// Return the file's space by setting its size to 0
|
|
//
|
|
FatTruncateOFile (OFile, 0);
|
|
//
|
|
// Free the directory entry for this file
|
|
//
|
|
Status = FatRemoveDirEnt (OFile->Parent, OFile->DirEnt);
|
|
if (EFI_ERROR (Status)) {
|
|
goto Done;
|
|
}
|
|
//
|
|
// Set a permanent error for this OFile in case there
|
|
// are still opened IFiles attached
|
|
//
|
|
OFile->Error = EFI_NOT_FOUND;
|
|
} else if (OFile->Error == EFI_NOT_FOUND) {
|
|
Status = EFI_SUCCESS;
|
|
}
|
|
|
|
Done:
|
|
//
|
|
// Always close the handle
|
|
//
|
|
FatIFileClose (IFile);
|
|
//
|
|
// Done
|
|
//
|
|
Status = FatCleanupVolume (OFile->Volume, NULL, Status, NULL);
|
|
FatReleaseLock ();
|
|
|
|
if (EFI_ERROR (Status)) {
|
|
Status = EFI_WARN_DELETE_FAILURE;
|
|
}
|
|
|
|
return Status;
|
|
}
|