mr

wrapper=
status=0

badsrc() {
	printf 'skipping %s\n' "$src" >&2
	status=1
}

randstr() {
	tr -cd '[:alnum:]' </dev/urandom | head -c 10
}

randdest() {
	dest=$dir$pfx$(randstr)$ext
}

while getopts :n opt; do
	case $opt in
	(n)
		wrapper=echo ;;
	(*)
		printf 'Usage: %s [-n] src...\n' "${0##*/}"
		exit 1
	esac
done

shift $((OPTIND - 1))

for src; do
	dir=
	pfx=
	ext=
	
	case $src in
	(''|.|..|./|../|*/.|*/..|*/./|*/../)
		badsrc
		continue ;;
	(*[!/]*)
		;;
	(*)
		badsrc
		continue
	esac
	
	case $src in
	(*/)
		tmp=${src%${src##*[!/]}}
		dir=${tmp%"${tmp##*/}"} ;;
	(*)
		name=${src##*/}
		dir=${src%"$name"}
	
		case $name in
		(.*)
			pfx=. ;;
		(*.*)
			ext=.${name##*.}
		esac
	esac
	
	if ! randdest; then
		exit 1
	fi

	while test -L "$dest" || test -e "$dest"; do
		randdest
	done
	
	if ! $wrapper mv -- "$src" "$dest"; then
		status=1
	fi
done

exit $status

# vi: ft=sh