add FAT_setAttr, expose FAT_setAttr/FAT_getAttr and add defines for DOS attributes

include/fat.h

@@ -99,6 +99,21 @@ Get Volume Label
 */
 extern void fatGetVolumeLabel (const char* name, char *label);
 
+// File attributes
+#define ATTR_ARCHIVE	0x20			// Archive
+#define ATTR_DIRECTORY	0x10			// Directory
+#define ATTR_VOLUME		0x08			// Volume
+#define ATTR_SYSTEM		0x04			// System
+#define ATTR_HIDDEN		0x02			// Hidden
+#define ATTR_READONLY	0x01			// Read only
+
+/*
+Methods to modify DOS File Attributes
+*/
+int	FAT_getAttr(const char *file);
+int	FAT_setAttr(const char *file, int attr );
+
+
 #ifdef __cplusplus
 }
 #endif

source/fatfile.c

@@ -69,8 +69,53 @@ int	FAT_getAttr(const char *file) {
 }
 
 int FAT_setAttr(const char *file, int attr) {
-	DIR_ENTRY dirEntry;
-	if (!_FAT_findEntry(file,&dirEntry)) return -1;
+
+	// Defines...
+	DIR_ENTRY_POSITION entryEnd;
+	PARTITION *partition = NULL;
+	DIR_ENTRY* dirEntry = NULL;
+
+	// Get Partition
+	partition = _FAT_partition_getPartitionFromPath( file );
+
+	// Check Partition
+	if( !partition )
+		return -1;
+	
+	// Move the path pointer to the start of the actual path
+	if (strchr (file, ':') != NULL)
+		file = strchr (file, ':') + 1;
+	if (strchr (file, ':') != NULL)
+		return -1;
+
+	// Get DIR_ENTRY
+	if( !_FAT_directory_entryFromPath (partition, dirEntry, file, NULL) )
+		return -1;
+
+	// Get Entry-End
+	entryEnd = dirEntry->dataEnd;
+
+	// Lock Partition
+	_FAT_lock(&partition->lock);
+
+
+	// Write Data
+	_FAT_cache_writePartialSector (
+		partition->cache // Cache to write
+		, &attr // Value to be written
+		, _FAT_fat_clusterToSector( partition , entryEnd.cluster ) + entryEnd.sector // cluster
+		, entryEnd.offset * DIR_ENTRY_DATA_SIZE + DIR_ENTRY_attributes // offset
+		, 1 // Size in bytes
+	);
+
+	// Flush any sectors in the disc cache
+	if ( !_FAT_cache_flush( partition->cache ) ) {
+		_FAT_unlock(&partition->lock); // Unlock Partition
+		return -1;
+	}
+
+	// Unlock Partition
+	_FAT_unlock(&partition->lock);
 
 	return 0;
 }