__SOFF
if (fp->pub._flags & __SOFF)
stderr->pub._flags &= ~__SOFF;
flags &= ~(__SLBF | __SNBF | __SMBF | __SOPT | __SOFF | __SNPT | __SEOF);
if ((fp->pub._flags & (__SAPP|__SOFF)) == (__SAPP|__SOFF) &&
fp->pub._flags &= ~__SOFF;
fp->pub._flags &= ~__SOFF;
fp->pub._flags &= ~__SOFF;
fp->pub._flags |= __SOFF;
if (fp->pub._flags & __SOFF) {
fp->pub._flags &= ~__SOFF;
fp->pub._flags &= ~__SOFF;