#!/bin/sh

set -eux

rm -f flog.out*

(
  echo "first line"
  sleep 0.1
  mv flog.out flog.out.1
  kill -1 $(cat flog.pid)
  sleep 0.1
  echo "second line"
) | flog -p flog.pid flog.out

grep "^first" flog.out.1
grep "^second" flog.out
