V8.13.294.2025.10.28

Signed-off-by: Marc S. Weidner <msw@coresecret.dev>

lib/lib_source_guard.sh

@@ -11,7 +11,9 @@
 # SPDX-Security-Contact: security@coresecret.eu
 
 #######################################
-# Prevent the file to be sourced twice.
+# Prevents the file to be sourced twice.
+# Globals:
+#   None
 # Arguments:
 #   1: File to source.
 #######################################
@@ -25,4 +27,7 @@ source_guard() {
     . "${var_file}"
   fi
 }
+### Prevents accidental 'unset -f'.
+# shellcheck disable=SC2034
+readonly -f source_guard
 # vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh