UF_PLEDGED
fdp->fd_ofileflags[fd] &= ~(UF_PLEDGED | UF_FORKCLOSE);
fdp->fd_ofileflags[i] |= UF_PLEDGED;
fdp->fd_ofileflags[fds[i]] = (rp->flags & UF_PLEDGED);
rp->flags = fdp->fd_ofileflags[fd] & UF_PLEDGED;
if (kf->fd_ofileflags & UF_PLEDGED)