fgetown
return fgetown(log_pgid, com, data);
return fgetown(pipe->pipe_pgid, cmd, data);
error = fgetown(so->so_pgid, cmd, data);
error = fgetown(d->bd_pgid, cmd, addr);
return fgetown(sc->sc_pgid, cmd, data);
error = fgetown(tp->tun_pgid, cmd, data);
int fgetown(pid_t, u_long, void *);