null_device        51 maint/gnulib/lib/freopen.c   char const *null_device = "NUL";
null_device        53 maint/gnulib/lib/freopen.c     filename = null_device;
null_device        55 maint/gnulib/lib/freopen.c   char const *null_device = "/dev/null";
null_device        78 maint/gnulib/lib/freopen.c           int nullfd = open (null_device, O_RDONLY | O_CLOEXEC);