while not bExit do
    write( shell.dir() .. "> " )

    local sLine = read( nil, tCommandHistory )
    table.insert( tCommandHistory, sLine )
    runLine( sLine )
end

-- If this is the toplevel shell, run the shutdown program
if parentShell == nil then
    if shell.resolveProgram( "shutdown" ) then
        shell.run( "shutdown" )
    end
    os.shutdown() -- just in case
end