diff --git a/backup-zfs b/backup-zfs
deleted file mode 100755
index b97b1d0..0000000
--- a/backup-zfs
+++ /dev/null
@@ -1,270 +0,0 @@
-#!/bin/bash
-# backup-zfs: use zfs send/recv to push/pull snapshots
-prog="$(basename "$0")"
-
-usage() {
-	cat >&2 <<-EOF
-	usage: $prog [-hvq] [-t tag] [-k keep] [-d dateopts] src dest
-	  use zfs send/recv to push/pull snapshots
-
-	  src          the source fs, specified as [host:]pool/path/to/fs
-	  dest         the destination fs parent, specified as [host:]pool/path/to/fs
-	               (the final path component of src will be appended to dest)
-	  -p           ssh port
-	  -h           help
-	  -v           verbose mode
-	  -q           quiet mode
-	  -t tag       tag to use for naming snapshots (default: backup-zfs)
-	  -k keep      number of snapshots to keep on src (default: 5)
-	  -d dateopts  options for date(1) - used to name the snapshots (default: +%F_%T)
-	  -s           store mode - output snaps from local fs to ssh server
-	  -r           read mode - read snaps from ssh server to local fs
-	  -g gpg-id    gpg recipient key id (store mode only)
-	EOF
-	exit $1
-}
-
-# log to syslog; if verbose or on a tty, also to stdout
-# usage: log msg
-log() {
-	logger -t "$prog" -- "$@"
-	if ! $quiet && [[ -t 1 ]] || $verbose ; then
-		echo "$@" >&2
-	fi
-}
-
-# exit with a code & message
-# usage: die $exitcode msg
-die() {
-	code="$1"
-	shift
-	if [[ $code -ne 0 ]] ; then
-		verbose=true log "FATAL: $@"
-	else
-		log "$@"
-	fi
-	exit $code
-}
-
-# run zfs(1) command either locally or via ssh
-# usage: ZFS "$host" command args...
-ZFS() {
-	host="$1"
-	shift
-	if [[ -n $host ]] ; then
-		log "remote ($host): zfs $@"
-		ssh -C -p $port "$host" zfs "$@"
-	else
-		log "local: zfs $@"
-		zfs "$@"
-	fi
-}
-
-###
-### defaults
-###
-tag="$prog"
-dateopts="+%F_%T"
-keep=5
-verbose=false
-quiet=false
-tossh=false
-fromssh=false
-port=22
-
-###
-### parse options
-###
-while getopts "hvqk:p:t:d:srg:" opt ; do
-	case $opt in
-		h) usage 0 ;;
-		v)
-			verbose=true
-			send_opts="-v"
-			recv_opts="-v"
-			;;
-		q) quiet=true ;;
-		k) keep=$OPTARG ;;
-		p) port=$OPTARG ;;
-		t) tag=$OPTARG ;;
-		d) dateopts=$OPTARG ;;
-		s) tossh=true ;;
-		r) fromssh=true ;;
-		g) gpgid="$OPTARG" ;;
-		*) usage 1 ;;
-	esac
-done
-shift $((OPTIND-1))
-date="$(date $dateopts)"
-$tossh && $fromssh && die 1 "-s and -r are mutually exclusive"
-if ! $tossh && [[ -n $gpgid ]] ; then
-	die 1 "-g can only be used with -s"
-fi
-
-###
-### parse src & dest host/fs info
-###
-# fail if there's ever >1 colon
-if [[ $1 =~ :.*: || $2 =~ :.*: ]] ; then
-	die 1 "invalid fsspec: '$1' or '$2'"
-fi
-
-# fail if src or dest isn't specified
-if [[ -z $1 || -z $2 ]] ; then
-	usage 1
-fi
-src="$1"
-dest="$2"
-
-###
-### ssh mode - output snaps from local fs to ssh or read snaps from ssh to local fs
-if $tossh ; then
-	log "sending from local zfs filesystem to SSH server"
-
-	# make sure src exists
-	if [[ $src =~ : ]] ; then
-		die 1 "$src must be a local zfs filesystem"
-	elif [[ $(ZFS "" list -H -o name "$src" 2>/dev/null) != $src ]] ; then
-		die 1 "$src must be a local zfs filesystem"
-	fi
-
-	# split dest to components
-	if [[ $dest =~ : ]] ; then
-		desthost="${dest%:*}"
-		destpath="${dest#*:}"
-	else
-		die 1 "$dest must be ssh host:path"
-	fi
-
-	# get the last src component
-	srcbase="${src##*/}"
-
-	###
-	### create new snapshot on src
-	###
-	snap="${tag}_$date"
-	cur="$src@$snap"
-	ZFS "$srchost" snapshot -r "$cur" || die $? "zfs snapshot failed"
-
-	###
-	### get newest snapshot on dest - it must exist on src
-	###
-	#last="$(ZFS "$desthost" list -d 1 -t snapshot -H -S creation -o name $destfs/$srcbase | head -n1 | cut -f2 -d@)"
-	last="$(ssh "$desthost" zfslast)"
-
-	###
-	### send
-	###
-	# refuse to send without a valid .last maker
-	if [[ -z $last ]] ; then
-		die 1 "ssh path contains no .last file"
-	# special case: tagged snapshots exist on dest, but src has rotated through all
-	elif ! ZFS "$srchost" list $src@$last &>/dev/null ; then
-		die 1 "no incremental path from from $src to $dest"
-	# normal case: send incremental
-	else
-		log "sending $([[ -n $gpgid ]] && echo "encrypted ")incremental snapshot from $src to $dest (${last#${tag}_}..${cur#*@${tag}_})"
-		#ZFS "$srchost" send $send_opts -R -i "$last" "$cur" | ZFS "$desthost" receive $recv_opts -Fue "$destfs" || die $? "zfs incremental send failed"
-		if [[ -n $gpgid ]] ; then
-			ZFS "$srchost" send $send_opts -R -i "$last" "$cur" \
-				| gpg --trust-model always --encrypt --recipient "$gpgid" \
-				| ssh "$desthost" zfswrite "${tag}_$date.zfssnap.gpg" \
-				|| die $? "zfs incremental send failed"
-			ssh "$desthost" zfslast "$snap"
-		else
-			ZFS "$srchost" send $send_opts -R -i "$last" "$cur" \
-				| ssh "$desthost" zfswrite "${tag}_$date.zfssnap" \
-				|| die $? "zfs incremental send failed"
-			ssh "$desthost" zfslast "$snap"
-		fi
-	fi
-
-	exit
-elif $fromssh ; then
-	log "receving from SSH server to local zfs filesystem"
-
-	# make sure dest exists
-	if [[ $dest =~ : ]] ; then
-		die 1 "$dest must be a local zfs filesystem"
-	elif [[ $(ZFS "" list -H -o name "$dest" 2>/dev/null) != $dest ]] ; then
-		die 1 "$dest must be a local zfs filesystem"
-	fi
-
-	# split src into components
-	if [[ $src =~ : ]] ; then
-		srchost="${src%:*}"
-		srcpath="${src#*:}"
-	else
-		die 1 "$src must be ssh host:path"
-	fi
-
-	###
-	### receive
-	###
-	log "receiving incremental snapshot from $src to $dest"
-	#ZFS "$srchost" send $send_opts -R -i "$last" "$cur" | ZFS "$desthost" receive $recv_opts -Fue "$destfs" || die $? "zfs incremental send failed"
-	for file in $(ssh "$srchost" zfsfind | sort) ; do
-		log "receiving $file from $srchost"
-		if [[ $file =~ \.gpg$ ]] ; then
-			ssh "$srchost" zfsget "$file" | gpg | ZFS "$desthost" receive $recv_opts -Fue "$dest" \
-				&& ssh "$srchost" rm "$file"
-		else
-			ssh "$srchost" zfsget "$file" | ZFS "$desthost" receive $recv_opts -Fue "$dest" \
-				&& ssh "$srchost" rm "$file"
-		fi
-	done
-
-	exit
-fi
-
-# discard anything before a colon to get the fs
-srcfs="${src#*:}"
-destfs="${dest#*:}"
-
-# iff there is a colon, discard everything after it to get the host
-[[ $src =~ : ]] && srchost="${src%:*}"
-[[ $dest =~ : ]] && desthost="${dest%:*}"
-
-# get the last src component
-srcbase="${srcfs##*/}"
-
-# ensure the destination fs exists before proceeding
-if [[ $(ZFS "$desthost" list -H -o name "$destfs" 2>/dev/null) != $destfs ]] ; then
-	die 1 "destination fs '$destfs' doesn't exist"
-fi
-
-###
-### create new snapshot on src
-###
-cur="$srcfs@${tag}_$date"
-ZFS "$srchost" snapshot -r "$cur" || die $? "zfs snapshot failed"
-
-###
-### get newest snapshot on dest - it must exist on src
-###
-last="$(ZFS "$desthost" list -d 1 -t snapshot -H -S creation -o name $destfs/$srcbase | head -n1 | cut -f2 -d@)"
-
-###
-### send & receive
-###
-# 1st time: send full snapshot
-if [[ -z $last ]] ; then
-	log "sending full recursive snapshot from $src to $dest"
-	ZFS "$srchost" send $send_opts -R "$cur" | ZFS "$desthost" receive $recv_opts -Fue "$destfs" || die $? "zfs full send failed"
-# special case: tagged snapshots exist on dest, but src has rotated through all
-elif ! ZFS "$srchost" list $srcfs@$last &>/dev/null ; then
-	die 1 "no incremental path from from $src to $dest"
-# normal case: send incremental
-else
-	log "sending incremental snapshot from $src to $dest (${last#${tag}_}..${cur#*@${tag}_})"
-	ZFS "$srchost" send $send_opts -R -i "$last" "$cur" | ZFS "$desthost" receive $recv_opts -Fue "$destfs" || die $? "zfs incremental send failed"
-fi
-
-###
-### clean up old snapshots
-###
-for snap in $(ZFS "$srchost" list -d 1 -t snapshot -H -S creation -o name $srcfs \
-	      | grep -F "@${tag}_" | cut -f2 -d@ | tail -n+$((keep+1)) ) ;
-do
-	ZFS "$srchost" destroy -r $srcfs@$snap
-done