-x ssh $rhost "$sshpfx $rsharedir/snap-drop"
-x ssh $rhost "$sshpfx $retcdir/snap/$snapkind snap $rvardir $device $mountpoint"
-ssh $rhost <$td/sentinel 4<&- "
+x ssh $sshopts $rhost "$sshpfx $rsharedir/snap-drop"
+ssh $sshopts $rhost "
+ $sshpfx
+ set -e
+ cd $rvardir
+ echo '$retcdir/snap/$snapkind drop $rvardir' >snap-drop.new
+ mv snap-drop.new snap-drop
+"
+x ssh $sshopts $rhost "$sshpfx $retcdir/snap/$snapkind snap $rvardir $device $mountpoint"
+ssh $sshopts $rhost <$td/sentinel 4<&- "