avoid open3() since it could get in deadlocks
avoid open3() since it could get in deadlocks

cwyang/h2o,yannick/h2o,h2o/h2o,cwyang/h2o,yannick/h2o,yannick/h2o,cwyang/h2o,h2o/h2o,cwyang/h2o,devnexen/h2o,h2o/h2o,h2o/h2o,devnexen/h2o,yannick/h2o,devnexen/h2o,yannick/h2o,cwyang/h2o,h2o/h2o,h2o/h2o,devnexen/h2o,cwyang/h2o,cwyang/h2o,devnexen/h2o,devnexen/h2o,devnexen/h2o,h2o/h2o,yannick/h2o,yannick/h2o,devnexen/h2o,devnexen/h2o,cwyang/h2o,h2o/h2o,yannick/h2o,h2o/h2o,yannick/h2o