cd For Viewer

local tArgs = { ... }
if #tArgs < 1 then
    print( "Usage: cd <path>" )
    return
end

local sNewDir = shell.resolve( tArgs[1] )
if fs.isDir( sNewDir ) then
    if tArgs[2] == "OS" then print("Not a directory")
    else
        shell.setDir( sNewDir )
    end
else
    print( "Not a directory" )
    return
end