+# wait for up to 10s for a pid file to appear to avoid possible race
+# when a helper is started and dosn't write the PID quick enough
+waitforpidfile() {
+ local PIDFILE="$1"
+ for i in $(seq 10); do
+ if test -s "$PIDFILE"; then
+ return 0
+ fi
+ sleep 1
+ done
+ msgdie "waiting for $PIDFILE failed"
+ return 1
+}
+