nullfd             78 maint/gnulib/lib/freopen.c           int nullfd = open (null_device, O_RDONLY | O_CLOEXEC);
nullfd             80 maint/gnulib/lib/freopen.c           if (nullfd != fd)
nullfd             82 maint/gnulib/lib/freopen.c               if (dup2 (nullfd, fd) < 0)
nullfd             84 maint/gnulib/lib/freopen.c               close (nullfd);