#!/bin/sh source ./assert.sh PROGRAM_EXEC="$1" assert "Usage" "missing argument for option '-b'" 1 $PROGRAM_EXEC backup -b assert "Usage" "missing argument for option '-s'" 1 $PROGRAM_EXEC backup -s assert "Usage" "missing argument for option '-b'" 1 $PROGRAM_EXEC restore -b assert "Usage" "missing argument for option '-s'" 1 $PROGRAM_EXEC restore -s exit 0