OLDNDELAY
{ SF(OLDNDELAY), "use old NDELAY TTY semantics" },
if (stp->sd_flag & OLDNDELAY)
if (stp->sd_flag & (STWRERR|STRHUP|STPLEX|STRDELIM|OLDNDELAY))
(STWRERR|STRHUP|STPLEX|STRDELIM|OLDNDELAY))) {
(stp->sd_flag & OLDNDELAY) &&
stp->sd_flag |= OLDNDELAY;
stp->sd_flag &= ~OLDNDELAY;
if (stp->sd_flag & OLDNDELAY)
stp->sd_flag |= OLDNDELAY;