XS_PSTS_GRACE
#define XS_CMD_S_GRACE(xs) (xs)->xs_status |= XS_PSTS_GRACE
#define XS_CMD_C_GRACE(xs) (xs)->xs_status &= ~XS_PSTS_GRACE
#define XS_CMD_GRACE_P(xs) (((xs)->xs_status & XS_PSTS_GRACE) != 0)
