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/******************************* LICENCE **************************************
* Any code in this file may be redistributed or modified under the terms of
* the GNU General Public Licence as published by the Free Software
* Foundation; version 2 of the licence.
****************************** END LICENCE ***********************************/
/******************************************************************************
* Author:
* Andrew Smith, http://littlesvr.ca/misc/contactandrew.php
*
* Contributors:
*
******************************************************************************/
#include <strings.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <stdio.h>
#include "bk.h"
#include "bkInternal.h"
#include "bkPath.h"
#include "bkError.h"
#include "bkDelete.h"
/*******************************************************************************
* bk_delete_boot_record()
* deletes whatever reference to a boot record volinfo has
* */
void bk_delete_boot_record(VolInfo* volInfo)
{
volInfo->bootMediaType = BOOT_MEDIA_NONE;
if(volInfo->bootRecordPathAndName != NULL)
{
free(volInfo->bootRecordPathAndName);
volInfo->bootRecordPathAndName = NULL;
}
}
int bk_delete(VolInfo* volInfo, const char* pathAndName)
{
int rc;
NewPath path;
bool dirFound;
BkDir* parentDir;
rc = makeNewPathFromString(pathAndName, &path);
if(rc <= 0)
{
freePathContents(&path);
return rc;
}
if(path.numChildren == 0)
{
freePathContents(&path);
return BKERROR_DELETE_ROOT;
}
/* i want the parent directory */
path.numChildren--;
dirFound = findDirByNewPath(&path, &(volInfo->dirTree), &parentDir);
path.numChildren++;
if(!dirFound)
{
freePathContents(&path);
return BKERROR_DIR_NOT_FOUND_ON_IMAGE;
}
deleteNode(volInfo, parentDir, path.children[path.numChildren - 1]);
freePathContents(&path);
return 1;
}
void deleteNode(VolInfo* volInfo, BkDir* parentDir, char* nodeToDeleteName)
{
BkFileBase** childPtr;
BkFileBase* nodeToFree;
childPtr = &(parentDir->children);
while(*childPtr != NULL)
{
if( strcmp((*childPtr)->name, nodeToDeleteName) == 0 )
{
nodeToFree = *childPtr;
*childPtr = (*childPtr)->next;
if( IS_DIR(nodeToFree->posixFileMode) )
{
deleteDirContents(volInfo, BK_DIR_PTR(nodeToFree));
}
else if ( IS_REG_FILE(nodeToFree->posixFileMode) )
{
deleteRegFileContents(volInfo, BK_FILE_PTR(nodeToFree));
}
/* else the free below will be enough */
free(nodeToFree);
break;
}
childPtr = &((*childPtr)->next);
}
}
/*******************************************************************************
* deleteDirContents()
* deletes all the contents of a directory
* recursive
* */
void deleteDirContents(VolInfo* volInfo, BkDir* dir)
{
BkFileBase* child;
BkFileBase* nextChild;
child = dir->children;
while(child != NULL)
{
nextChild = child->next;
deleteNode(volInfo, dir, child->name);
child = nextChild;
}
}
/* delete the contents of the BkFile structure, not the actual file contents */
void deleteRegFileContents(VolInfo* volInfo, BkFile* file)
{
if( file->onImage )
free( file->pathAndName );
/* check whether file is being used as a boot record */
if(volInfo->bootMediaType != BOOT_MEDIA_NONE &&
volInfo->bootMediaType == BOOT_MEDIA_NO_EMULATION)
{
if(volInfo->bootRecordIsVisible &&
volInfo->bootRecordOnImage == file)
{
/* and stop using it. perhaps insert a hook here one day to
* let the user know the boot record has been/will be deleted */
bk_delete_boot_record(volInfo);
}
}
}
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