add abc to all video and render groups

root/etc/cont-init.d/50-gid-video

@@ -3,32 +3,29 @@
 # check for the existence of a video and/or tuner device
 if [ -e /dev/dri ] || [ -e /dev/dvb ]; then
 	if [ -e /dev/dri ]; then
-		VIDEO_GID=$(stat -c '%g' /dev/dri/* | grep -v '^0$' | head -n 1)
-	else
-		VIDEO_GID=$(stat -c '%g' /dev/dvb/* | grep -v '^0$' | head -n 1)
+	FILES="${FILES} /dev/dri/*"
 	fi
-	# just add abc to root if stuff in dri/dvb is root owned
-	if [ -z "${VIDEO_GID}" ]; then
-		usermod -a -G root abc
-		exit 0
+	if [ -e /dev/dvb ]; then
+	FILES="${FILES} /dev/dvb/*"
 	fi
 else
 	exit 0
 fi
 
-# Check if this GID matches the current abc user
-ABCGID=$(getent group abc | awk -F: '{print $3}')
-if [ "${ABCGID}" == "${VIDEO_GID}" ]; then
-	exit 0
-fi
-
-# Check if the GID is taken and swap to 65533
-CURRENT=$(getent group ${VIDEO_GID} | awk -F: '{print $1}')
-if [ -z "${CURRENT}" ] || [ "${CURRENT}" == 'video' ]; then
-	groupmod -g ${VIDEO_GID} video
-	usermod -a -G video abc
+for i in $FILES
+do
+	VIDEO_GID=$(stat -c '%g' "$i")
+	if ! id -G abc | grep -qw "$VIDEO_GID"; then
+		if [ "${VIDEO_GID}" == '0' ]; then
+			usermod -a -G root abc
 		else
-	groupmod -g 65533 ${CURRENT}
-	groupmod -g ${VIDEO_GID} video
-	usermod -a -G video abc
+			VIDEO_NAME=$(getent group "${VIDEO_GID}" | awk -F: '{print $1}')
+			if [ -z "${VIDEO_NAME}" ]; then
+				VIDEO_NAME="video$(head /dev/urandom | tr -dc 0-9 | head -c4)"
+				groupadd "$VIDEO_NAME"
+				groupmod -g "$VIDEO_GID" "$VIDEO_NAME"
+			fi
+			usermod -a -G "$VIDEO_NAME" abc
+		fi
 	fi
+done