PGRP_LOCK
PGRP_LOCK(pg);
PGRP_LOCK(pg);
PGRP_LOCK(pg);
PGRP_LOCK(pg);
PGRP_LOCK(p1->p_pgrp);
PGRP_LOCK(pgrp);
PGRP_LOCK(pgrp);
PGRP_LOCK(pgrp);
PGRP_LOCK(pgrp);
PGRP_LOCK(savepgrp);
PGRP_LOCK(savepgrp);
PGRP_LOCK(pgrp);
PGRP_LOCK(pgrp);
PGRP_LOCK(pgrp);
PGRP_LOCK(pgrp);
PGRP_LOCK(pg);
PGRP_LOCK(pg);
PGRP_LOCK(pgrp);
PGRP_LOCK(sigio->sio_pgrp);
PGRP_LOCK(tp->t_pgrp);
PGRP_LOCK(pg);
PGRP_LOCK(tp->t_pgrp);
PGRP_LOCK(pg); \