cd_owner
if (curr->cd_owner) {
"not happen.\n", curr->cd_owner, getpid());
if (cdesc[idx].cd_owner)
"not happen(2).\n", cdesc[idx].cd_owner,
cdesc[idx].cd_owner = getpid();
if (cdesc[idx].cd_owner != getpid())
getpid(), cdesc[idx].cd_owner);
cdesc[idx].cd_owner = 0;
if (cdesc[idx].cd_owner != getpid())
getpid(), cdesc[idx].cd_owner);
cdesc[idx].cd_owner = 0;