firewall: fix firewall reload lock (#41)

package/network/config/firewall/Makefile

@@ -9,7 +9,7 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=firewall
-PKG_RELEASE:=2
+PKG_RELEASE:=3
 
 PKG_SOURCE_PROTO:=git
 PKG_SOURCE_URL=$(PROJECT_GIT)/project/firewall3.git

package/network/config/firewall/files/firewall.init

@@ -4,6 +4,17 @@ START=19
 USE_PROCD=1
 QUIET=""
 
+LOCK_FILE="/var/lock/procd_firewall.lock"
+set_lock() {
+	exec 1000>"$LOCK_FILE"
+	flock -xn 1000
+}
+
+unset_lock() {
+	flock -u 1000
+	rm -rf "$LOCK_FILE"
+}
+
 validate_firewall_redirect()
 {
 	uci_validate_section firewall redirect "${1}" \
@@ -30,28 +41,39 @@ validate_firewall_rule()
 
 service_triggers() {
 	procd_add_reload_trigger firewall	
+	set_lock
 
 	procd_open_validate
 	validate_firewall_redirect
 	validate_firewall_rule
 	procd_close_validate
+	unset_lock
 }
 
 restart() {
+	unset_lock
+	set_lock
 	fw3 restart
+	unset_lock
 }
 
 start_service() {
+	set_lock
 	fw3 ${QUIET} start
+	unset_lock
 }
 
 stop_service() {
 	fw3 flush
+	unset_lock
 }
 
 reload_service() {
+	unset_lock
+  	set_lock
 	reload_config firewall
 	fw3 reload
+	unset_lock
 }
 
 boot() {