Return error code in child process
Return error code in child process

From: Daniel Lezcano <3211518dd4d87cb3f7ee12cb52e14b7fb2bc0446@fr.ibm.com>

Return the error code when the exec fails in the child process, that
decreases the granularity of the error given to the user.

Signed-off-by: Daniel Lezcano <3211518dd4d87cb3f7ee12cb52e14b7fb2bc0446@fr.ibm.com>

codebauss/lxc,lisongmin/lxc,ksperis/lxc,abstrakraft/lxc-android-lxc,cjwatson/lxc,codebauss/lxc,hkjolhede/lxc,glensc/lxc,sapun/lxc,thmo/lxc,cipriancraciun/lxc,kylef/lxc,caglar10ur/lxc,lisongmin/lxc,hfuCN/lxc,LynxChaus/lxc,Distrotech/lxc,virajs/lxc,szaszg/lxc,rowhit/lxc,hallyn/lxc,ostap/lxc,coconutpilot/lxc-gentoo-new,tych0/lxc,caglar10ur/lxc,thmo/lxc,lazy404/lxc,major/lxc,rldleblanc/lxc,ecarrara/lxc,coconutpilot/lxc-gentoo-new,ecarrara/lxc,ss1h2a3tw/lxc,armcc/lxc,fwilson42/lxc,rowhit/lxc,major/lxc,DarknessBeforeDawn/lxc,efiop/lxc,GreatFruitOmsk/lxc,major/lxc,hfuCN/lxc,Pelagicore/lxc,LynxChaus/lxc,ojkastl/lxc_Patches,GreatFruitOmsk/lxc,smoser/lxc,christiaan/lxc,JohnPeacockMessageSystems/lxc,regit/lxc,tych0/lxc,aeris/lxc,regit/lxc,aeris/lxc,cjwatson/lxc,ss1h2a3tw/lxc,efiop/lxc,regit/lxc,armcc/lxc,Ponce/lxc,codebauss/lxc,Ponce/lxc,rowhit/lxc,hkjolhede/lxc,ysbnim/lxc,DarknessBeforeDawn/lxc,weizhenwei/lxc,akshaykarle/lxc,yubo/lxc,jirislaby/lxc,cipriancraciun/lxc,Pelagicore/lxc,ojkastl/lxc_Patches,thmo/lxc,bostjan/lxc,raspberrypython/lxc,weizhenwei/lxc,jirislaby/lxc,usc-isi/lxc,Distrotech/lxc,DarknessBeforeDawn/lxc,Pelagicore/lxc,virajs/lxc,hfuCN/lxc,raspberrypython/lxc,smoser/lxc,bmoar/lxc,fwilson42/lxc,sapun/lxc,yubo/lxc,bmoar/lxc,ioops/lxc,sapun/lxc,hallyn/lxc,bostjan/lxc,akshaykarle/lxc,terceiro/lxc,efiop/lxc,lazy404/lxc,terceiro/lxc,hallyn/lxc,ostap/lxc,virajs/lxc,federicobriata/lxc,lazy404/lxc,usc-isi/lxc,ksperis/lxc,cjwatson/lxc,caglar10ur/lxc,smoser/lxc,JohnPeacockMessageSystems/lxc,raspberrypython/lxc,bmoar/lxc,ysbnim/lxc,abstrakraft/lxc-android-lxc,jirislaby/lxc,tych0/lxc,ecarrara/lxc,aeris/lxc,ksperis/lxc,abstrakraft/lxc-android-lxc,rldleblanc/lxc,ojkastl/lxc_Patches,smoser/lxc,ioops/lxc,christiaan/lxc,QingweiPeterLan/cs188-lxc,akshaykarle/lxc,LynxChaus/lxc,inokappa/lxc,glensc/lxc,ss1h2a3tw/lxc,terceiro/lxc,ysbnim/lxc,federicobriata/lxc,fwilson42/lxc,armcc/lxc,inokappa/lxc,QingweiPeterLan/cs188-lxc,lisongmin/lxc,potatosalad/lxc,rldleblanc/lxc,kylef/lxc,Distrotech/lxc,QingweiPeterLan/cs188-lxc,potatosalad/lxc,weizhenwei/lxc,JohnPeacockMessageSystems/lxc,Ponce/lxc,federicobriata/lxc,GreatFruitOmsk/lxc,abstrakraft/lxc-android-lxc,christiaan/lxc,usc-isi/lxc,hkjolhede/lxc,ioops/lxc,szaszg/lxc,yubo/lxc,ojkastl/lxc_Patches,glensc/lxc,bostjan/lxc,szaszg/lxc