Implement Ext2.Open()
diff --git a/src/filo-fs-ext2.ads b/src/filo-fs-ext2.ads
index 2c30e0a..0deefb6 100644
--- a/src/filo-fs-ext2.ads
+++ b/src/filo-fs-ext2.ads
@@ -66,7 +66,7 @@
    subtype Inode_Extents_Index is Natural range 0 .. 59;
    subtype Inode_Extents is Buffer_Type (Inode_Extents_Index);
 
-   type Inode_Index is new Unsigned_32 range 1 .. Unsigned_32'Last;
+   type Inode_Index is new Unsigned_32 range 2 .. Unsigned_32'Last;
    subtype Inode_Size is Positive range 128 .. Positive (Unsigned_16'Last);
    subtype Desc_Size  is Positive range  32 .. 2 ** 15; -- power-of-2 that fits in 16 bits
 
@@ -74,6 +74,7 @@
    type Inode_Length is range 0 .. 2 ** 46;
 
    type Inode_Info is record
+      I           : Inode_Index;
       Mode        : Inode_Type := Inode_Type'First;
       Size        : Inode_Length := 0;
       Use_Extents : Boolean := False;
@@ -85,12 +86,13 @@
       Part_Len             : Partition_Length := 0;
       First_Data_Block     : FSBlock_Offset := 0;
       Block_Size_Bits      : Log_Block_Size := 10;
-      Inodes_Per_Group     : Inode_Index := 1;
+      Inodes_Per_Group     : Inode_Index := Inode_Index'First;
       Inode_Size           : Ext2.Inode_Size := Ext2.Inode_Size'First;
       Desc_Size            : Ext2.Desc_Size := Ext2.Desc_Size'First;
       Feature_Extents      : Boolean := False;
       Feature_64Bit        : Boolean := False;
       Inode                : Inode_Info := (others => <>);
+      Cur_Dir              : Inode_Index := Inode_Index'First;
       Block_Cache_Logical  : Cache_Label_Logical := (others => False);
       Block_Cache_Label    : Cache_Label_Array := (others => 0);
       Block_Cache          : Buffer_Type (Max_Block_Index) := (others => 16#00#);