    if [ -n "$DRY_RUN" ] ; then
        alias rm='echo rm'
        alias cp='echo cp'
    fi

Of course, output redirects will still overwrite the files, since the shell does it and IIRC this behaviour can't be changed.

▲ digiown 11 hours ago | parent [-]

set -o noclobber

	▲	7 hours ago \| parent [-]
		[deleted]