TERMP_PREKEEP
p->flags &= ~(TERMP_KEEP | TERMP_PREKEEP);
if ((n->aux = p->flags & TERMP_PREKEEP) == 0)
p->flags |= TERMP_PREKEEP;
p->flags &= ~(TERMP_KEEP | TERMP_PREKEEP);
p->flags |= TERMP_PREKEEP;
p->flags &= ~(TERMP_KEEP | TERMP_PREKEEP);
p->flags |= TERMP_PREKEEP;
p->flags |= TERMP_PREKEEP;
if (p->flags & TERMP_PREKEEP)