$xtrace
}
+# Wait until the condition is met.
+# wait_until condition timeout interval
+function wait_until {
+ local condition="$1"
+ local timeout=$2
+ local interval=$3
+
+ while eval ${condition}
+ do
+ sleep ${interval}
+ timeout=$((${timeout} - ${interval}))
+ if [[ ${timeout} < 0 ]]; then
+ err $LINENO "timed out ($condition)..."
+ return 1
+ fi
+ done
+}