PF_SOPEN
if ((pti->pt_flags & (PF_SOPEN|PF_MOPEN)) == 0 &&
else if ((pti->pt_flags & PF_SOPEN) == 0)
pti->pt_flags |= PF_SOPEN;
pti->pt_flags &= ~PF_SOPEN;
if ((pti->pt_flags & PF_SOPEN) == 0)
if (pti->pt_flags & PF_SOPEN)