prerm is in rsync 3.1.2-2.1ubuntu1.
This file is a maintainer script. It is executed when installing (*inst) or removing (*rm) the package.
The actual contents of the file can be viewed below.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 | #!/bin/sh -e
# prerm for rsync
pathfind() {
	OLDIFS="$IFS"
	IFS=:
	for p in $PATH; do
		if [ -x "$p/$*" ]; then
			IFS="$OLDIFS"
			return 0
		fi
	done
	IFS="$OLDIFS"
	return 1
}
case "$1" in
	remove|deconfigure)
		if [ -h /usr/doc/rsync ]; then
			rm -f /usr/doc/rsync
		fi
		if [ -x /etc/init.d/rsync ]; then
			if pathfind invoke-rc.d; then
				invoke-rc.d rsync stop
			else
				/etc/init.d/rsync stop
			fi
		fi
		if [ -d /run/systemd/system ]; then
			deb-systemd-invoke stop rsync.service >/dev/null
		fi
		;;
	upgrade|failed-upgrade)
		;;
	*)
		echo "prerm called with unknown argument \`$1'" >&2
		exit 0
	;;
esac
exit 0
 |