x11-autologin: use separate lightdm config for autologin

features.in/x11-autologin/rootfs/image-scripts.d/40-x11-autologin

@@ -54,23 +54,21 @@ fi
 ## lightdm autologin
 LIGHTDM_CONF=/etc/lightdm/lightdm.conf
 if [ -f "$LIGHTDM_CONF" ]; then
-	backup "$LIGHTDM_CONF"
+	mkdir -p /etc/lightdm/lightdm.conf.d
+	cat > /etc/lightdm/lightdm.conf.d/autologin.conf <<AUTOLOGIN_LIGHTDM
+[Seat:*]
+autologin-user=altlinux
+autologin-user-timeout=0
+AUTOLOGIN_LIGHTDM
 	default_session="$(ls -1 /usr/share/xsessions/*.desktop | sed -n 's/^.*\/\([^/]\+\)\.desktop$/\1/;1p')"
 	if [ -n "$default_session" ]; then
-		sed -i \
-			-e "s/^#(autologin-session=).*$/\1$default_session/" \
-			"$LIGHTDM_CONF"
+		echo "autologin-session=$default_session" >> /etc/lightdm/lightdm.conf.d/autologin.conf
 	else
 		echo "** WARNING: no sessions found in /usr/share/xsessions/" >&2
 	fi
-	sed -i \
-		-e "s/^#\(autologin-user=\).*$/\1$USER/" \
-		-e "s/^#\(autologin-user-timeout=0\)/\1/" \
-		"$LIGHTDM_CONF"
 	backup "/etc/group"
 	add_nopasswdlogin_group lightdm ||:
 
-	restore_later "$LIGHTDM_CONF"
 	restore_later "/etc/group"
 fi