if self.verbose > 0:
print 'Changing user to %s:%s (%s:%s)' % (
user, group or '(unknown)', uid, gid)
if hasattr(os, 'initgroups'):
os.initgroups(user, gid)
else:
os.setgroups([e.gr_gid for e in grp.getgrall()
if user in e.gr_mem] + [gid])
if gid:
os.setgid(gid)
if uid:
