DDBG
DDBG("ptmopen(): mop allocation failed\n", 0);
DDBG("ptmopen(): pty allocation failed\n", 0);
DDBG("ptmopen(): allocated minor %d\n", dminor);
DDBG("ptmopen(%d): need to grow\n", (int)ptms_inuse);
DDBG("entering ptsopen(%d)", dminor);
DDBG("ptsopen: state = %x\n", ptsp->pt_state);