+# debugging helper
+_dump_args()
+{
+ local i
+
+ i=1
+ echo "DUMP args for ${FUNCNAME[1]}:"
+ while [ $# -gt 0 ]; do
+ echo "ARG[$i]: $1"
+ i=$(($i+1))
+ shift
+ done
+}
+
+# read arguments, look if we're calling btrfs and if there's a known
+# subcommand, return argument index to insert, taking root helper into
+# consideration, returns 2 for unknown subcommand
+_get_spec_ins()
+{
+ if [ "$1" = 'root_helper' ]; then
+ if [[ $2 =~ /btrfs$ ]]; then
+ echo -n 4
+ return
+ fi
+ else
+ if [[ $1 =~ /btrfs$ ]]; then
+ echo -n 3
+ return
+ fi
+ fi
+ echo -n 2
+}
+
+# return command-specific arguments if enabled
+_cmd_spec()
+{
+ if [ "$TEST_ENABLE_OVERRIDE" = 'true' ]; then
+ # if defined via common.local, use it, otherwise pass make
+ # arguments
+ if [ "$(type -t _skip_spec)" = 'function' ]; then
+ if _skip_spec "$@"; then
+ return
+ fi
+ fi
+ case "$1" in
+ check) echo -n "$TEST_ARGS_CHECK" ;;
+ esac
+ fi
+}
+
+# Argument passing magic:
+# the command passed to run_* helpers is inspected, if there's 'btrfs command'
+# found and there are defined additional arguments, they're inserted just after
+# the command name, ie. any arguments in the test could override them.
+#
+# The root helper is recognized. Unrecognized subcommands or external tools
+# are not affected.
+