* spawn child process which is detached from parent and inherit stdio
* spawn child process which is detached from parent and inherit stdio

Change-Id: I5c5260e6c73979c8d0420d5c33874cbe1bc0e2b7

zxc122333/pomelo,compcj/pomelo,tomdev2008/pomelo,silverera/pomelo_fix,zxc122333/pomeco,fabiobc/pomelo,NetEase/pomelo,zhukaixy/pomelo,samlin08/pomelo,silverera/pomelo_fix,saruno/pomelo,laiqiqi886/pomelo,LosingLin/pomelo,inetufo/pomelo_fix,baidao/pomelo,kkkkyue/pomelo,rain1017/pomelo,tomdev2008/pomelo,beni55/pomelo,PortNumber53/pomelo,wangchuan3533/pomelo,MetSystem/pomelo,youprofit/pomelo,MQQiang/pomelo,wangchuan3533/pomelo,zhukaixy/pomelo,ljhsai/pomelo,NetEase/pomelo,inetufo/pomelo_fix,zxc122333/pomelo,microlv/pomelo,chianquan/pomelo,skyblue/pomelo,baegjins/pomelo,zxc122333/pomelo,sumrac69/pomelo,blueseason/pomelo,lntitbk/pomelo,jokerCode/pomelo,beni55/pomelo,Suninus/pomelo,chianquan/pomelo,rain1017/pomelo,skyblue/pomelo,laiqiqi886/pomelo,cynron/pomelo,saruno/pomelo,WeBest/pomelo,MQQiang/pomelo,WeBest/pomelo,onelei/pomelo,skyblue/pomelo,impcyber/pomelo,IssicLzx/pomelo,compcj/pomelo,ljhsai/pomelo,bobcui/pomelo,chenhaooo/pomelo,hello2009chen/pomelo,baegjins/pomelo,tomdev2008/pomelo,MQQiang/pomelo,jqk6/pomelo,Suninus/pomelo,fabiobc/pomelo,baongoccarrot/pomelo,blueseason/pomelo,PortNumber53/pomelo,MetSystem/pomelo,wangchuan3533/pomelo,zhukaixy/pomelo,leopoldfreeman/pomelo,sumrac69/pomelo,kkkkyue/pomelo,IssicLzx/pomelo,jokerCode/pomelo,silverera/pomelo_fix,NetEase/pomelo,baegjins/pomelo,fabiobc/pomelo,blueseason/pomelo,baongoccarrot/pomelo,microlv/pomelo,hzruandd/pomelo,oceanjack/pomelo,beni55/pomelo,jokerCode/pomelo,inetufo/pomelo_fix,cosmosbox/pomelo,baidao/pomelo,lntitbk/pomelo,LosingLin/pomelo,PortNumber53/pomelo,jqk6/pomelo,hello2009chen/pomelo,bobcui/pomelo,leopoldfreeman/pomelo,baidao/pomelo,chianquan/pomelo,compcj/pomelo,zxc122333/pomeco,jqk6/pomelo,ljhsai/pomelo,IssicLzx/pomelo,youprofit/pomelo,MetSystem/pomelo,onelei/pomelo,oceanjack/pomelo,cynron/pomelo,youprofit/pomelo,cosmosbox/pomelo,baongoccarrot/pomelo,cosmosbox/pomelo,LosingLin/pomelo,hzruandd/pomelo,laiqiqi886/pomelo,chenhaooo/pomelo,cynron/pomelo,samlin08/pomelo,rain1017/pomelo,kkkkyue/pomelo,oceanjack/pomelo,impcyber/pomelo,microlv/pomelo,leopoldfreeman/pomelo,hzruandd/pomelo,lntitbk/pomelo,chenhaooo/pomelo,Suninus/pomelo,bobcui/pomelo,WeBest/pomelo,onelei/pomelo,saruno/pomelo,samlin08/pomelo,hello2009chen/pomelo,sumrac69/pomelo