openwrt-packages-dist/utils/byobu/patches/103-add-hostname-fallback.patch

--- a/usr/lib/byobu/hostname
+++ b/usr/lib/byobu/hostname
@@ -20,12 +20,16 @@
 #    along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 __hostname_detail() {
-	hostname -f
+	hostname -f 2>/dev/null
 }
 
 __hostname() {
 	local h=
-	h=$(hostname -s 2>/dev/null || hostname)
+	if eval $BYOBU_TEST hostname >/dev/null 2>&1; then
+		h=$(hostname -s 2>/dev/null || hostname)
+	elif [ -r /proc/sys/kernel/hostname ]; then
+		read h < /proc/sys/kernel/hostname
+	fi
 	if metadata_available; then
 		local cache="$BYOBU_RUN_DIR/cache.$BYOBU_BACKEND/hostname"
 		# Background a retrieval of our public hostname