--- a/sbin/ftjail	Tue Sep 20 09:16:13 2022 +0200
+++ b/sbin/ftjail	Fri Sep 23 00:37:33 2022 +0200
@@ -42,6 +42,8 @@
 
   copy-skel [-A] [-L] [-M MOUNTPOINT] [-P] [-u]  SOURCE-DS SNAPSHOT-NAME TARGET-DS
 
+  build-etcupdate-current-tmpl DIRECTORY TARBALL
+
 ENVIRONMENT:
 
   All environment variables that affect "zfs" are effective also.
@@ -765,6 +767,26 @@
 }
 
 
+#:
+#: Implement the "build-etcupdate-current-tmpl" command
+#:
+command_build_etcupdate_current_tmpl() {
+    local _directory _tarball
+
+    _directory="${1-}"
+    _tarball="${2-}"
+
+    [ -z "${_directory}" ] && { echo "ERROR: no directory given" 1>&2; return 2; }
+    [ -z "${_tarball}" ] && { echo "ERROR: no directory given" 1>&2; return 2; }
+    [ -e "${_tarball}" ] && { echo "ERROR: \`${_tarball}' exists already" 1>&2; return 1; }
+
+    if ! tar -cjf "${_tarball}" -C "${_directory}/var/db/etcupdate/current" . ; then
+        rm -f "${_tarball}" || true
+        return 1
+    fi
+}
+
+
 #
 # Global option handling
 #
@@ -822,6 +844,9 @@
     copy-skel)
         command_copy_skel "$@"
         ;;
+    build-etcupdate-current-tmpl)
+        command_build_etcupdate_current_tmpl "$@"
+        ;;
     configure)
         echo "ERROR: use \`fjail configure' instead" 1>&2;
         exit 2