This commit fixes the deadlock introduced by commit
0980764d. The call getgrouplist() of
the glibc library isn't safe to be called in between fork and
exec (see commit 75c12564).
Signed-off-by: NMarc Hartmayer <mhartmay@linux.vnet.ibm.com>
Fixes: 0980764d ("util: share code between virExec and virCommandExec")
Reviewed-by: NBjoern Walk <bwalk@linux.vnet.ibm.com>
Reviewed-by: NBoris Fiuczynski <fiuczy@linux.vnet.ibm.com>