--- a/sbin/ftjail	Tue Sep 13 09:31:42 2022 +0200
+++ b/sbin/ftjail	Wed Sep 14 09:24:27 2022 +0200
@@ -76,6 +76,8 @@
     -A        Set "canmount=noauto" for all datasets in the target dataset
     -L        Copy dataset properties optimized for employing a
               "skeleton" subdirectory
+    -M MOUNTPOINT   Set the "mountpoint" property for the TARGET-DS to
+              MOUNTPOINT (children will inherit it)
     -P        Copy dataset properties optimized for direct mounts
               of skeleton children over an already mounted base
     -u        Do not mount the target dataset automatically
@@ -707,16 +709,16 @@
 #:
 command_copy_skel() {
     local _ds_source _snapshot_name _ds_target
-    local _opt_symlink _opt_nomount
+    local _opt_symlink _opt_nomount _opt_canmount _opt_mountpoint
 
-    local _opt _name _relative_name _opt_canmount
+    local _opt _name _relative_name  _root_canmount
 
     _opt_symlink=""
     _opt_nomount=""
     _opt_canmount="-o canmount=on"
-
+    _opt_mountpoint=""
 
-    while getopts "ALPu" _opt ; do
+    while getopts "ALM:Pu" _opt ; do
         case ${_opt} in
             A)
                 _opt_canmount="-o canmount=noauto"
@@ -724,6 +726,9 @@
             L)
                 _opt_symlink="yes"
                 ;;
+            M)
+                _opt_mountpoint="${OPTARG}"
+                ;;
             P)
                 _opt_symlink="no"
                 ;;
@@ -760,9 +765,14 @@
                 if [ -z "${_relative_name}" ]; then
                     # root
                     if [ "${_opt_symlink}" = "yes" ]; then
-                        zfs send -Lec -p -v "${_name}" | zfs receive ${_opt_nomount} -v ${_opt_canmount} -x mountpoint "${_ds_target}${_relative_name}"
+                        _root_canmount="${_opt_canmount}"
                     else
-                        zfs send -Lec -p -v "${_name}" | zfs receive ${_opt_nomount} -v -o canmount=off -x mountpoint "${_ds_target}${_relative_name}"
+                        _root_canmount="-o canmount=off"
+                    fi
+                    if [ -n "${_opt_mountpoint}" ]; then
+                        zfs send -Lec -p -v "${_name}" | zfs receive ${_opt_nomount} -v ${_root_canmount} -o "mountpoint=${_opt_mountpoint}" "${_ds_target}${_relative_name}"
+                    else
+                        zfs send -Lec -p -v "${_name}" | zfs receive ${_opt_nomount} -v ${_root_canmount} -x mountpoint "${_ds_target}${_relative_name}"
                     fi
                 else
                     # child