1 files changed, 151 insertions, 0 deletions
diff --git a/lib/bkisofs/bkDelete.c b/lib/bkisofs/bkDelete.c
new file mode 100644
index 0000000..e8ab0b0
--- /dev/null
+++ b/lib/bkisofs/bkDelete.c
@@ -0,0 +1,151 @@
+/******************************* 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);
+        }
+    }
+}