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);