1 files changed, 12 insertions, 5 deletions
diff --git a/applications/luci-app-openvpn/luasrc/model/cbi/openvpn.lua b/applications/luci-app-openvpn/luasrc/model/cbi/openvpn.lua
index 1a1d33aa2..719145b88 100644
--- a/applications/luci-app-openvpn/luasrc/model/cbi/openvpn.lua
+++ b/applications/luci-app-openvpn/luasrc/model/cbi/openvpn.lua
@@ -25,8 +25,13 @@ uci:foreach( "openvpn_recipes", "openvpn_recipe",
 	end
 )
 
-function s.getPID(section)
-	return sys.exec("%s | grep -w %s | grep openvpn | grep -v grep | awk '{print $1}'" % { psstring,section} )
+function s.getPID(section) -- Universal function which returns valid pid # or nil
+	local pid = sys.exec("%s | grep -w %s | grep openvpn | grep -v grep | awk '{print $1}'" % { psstring,section} )
+	if pid and #pid > 0 and tonumber(pid) ~= nil then
+		return tonumber(pid)
+	else
+		return nil
+	end
 end
 
 function s.parse(self, section)
@@ -73,7 +78,7 @@ s:option( Flag, "enabled", translate("Enabled") )
 local active = s:option( DummyValue, "_active", translate("Started") )
 function active.cfgvalue(self, section)
 	local pid = s.getPID(section)
-	if pid and #pid > 0 and tonumber(pid) ~= nil then
+	if pid ~= nil then
 		return (sys.process.signal(pid, 0))
 			and translatef("yes (%i)", pid)
 			or  translate("no")
@@ -88,7 +93,7 @@ updown.redirect = luci.dispatcher.build_url(
 )
 function updown.cbid(self, section)
 	local pid = s.getPID(section)
-	self._state = pid and #pid > 0 and sys.process.signal(pid, 0)
+	self._state = pid ~= nil and sys.process.signal(pid, 0)
 	self.option = self._state and "stop" or "start"
 	return AbstractValue.cbid(self, section)
 end
@@ -99,7 +104,9 @@ end
 function updown.write(self, section, value)
 	if self.option == "stop" then
 		local pid = s.getPID(section)
-		sys.process.signal(pid,15)
+		if pid ~= nil then
+			sys.process.signal(pid,15)
+		end
 	else
 		luci.sys.call("/etc/init.d/openvpn start %s" % section)
 	end