SMNPT
if (fp->f_flags & (SMWR | SMRW | SMNBF | SMNPT))
fp->f_flags |= SMNPT;
return SMNPT;
return SMNPT;
return SMNPT;
flags |= SMNPT;
flags &= ~(SMLBF | SMNBF | SMMBF | SMOPT | SMNPT | SMFEOF | SMNOW |