umdns: add check for seccomp list

This should fix an issue when user have a router with enabled seccomp
and tries to run umdns package which was build with SDK with disabled
seccomp support.

Signed-off-by: Jan Pavlinec <[email protected]>

package/network/services/umdns/Makefile

@@ -8,7 +8,7 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=umdns
-PKG_RELEASE:=3
+PKG_RELEASE:=4
 
 PKG_SOURCE_URL=$(PROJECT_GIT)/project/mdnsd.git
 PKG_SOURCE_PROTO:=git

package/network/services/umdns/files/umdns.init

@@ -33,7 +33,7 @@ start_service() {
 
 	procd_open_instance
 	procd_set_param command "$PROG"
-	procd_set_param seccomp /etc/seccomp/umdns.json
+	[ -f /etc/seccomp/umdns.json ] && procd_set_param seccomp /etc/seccomp/umdns.json
 	procd_set_param respawn
 	procd_open_trigger
 	procd_add_config_trigger "config.change" "umdns" /etc/init.d/umdns reload