Make sure only one error will be sent to not-started Service

src/jrd/svc.cpp

@@ -516,7 +516,7 @@ void Service::putBytes(const UCHAR* bytes, FB_SIZE_T len)
 
 void Service::setServiceStatus(const ISC_STATUS* status_vector)
 {
-	if (checkForShutdown())
+	if (checkForShutdown() || checkForFailedStart())
 	{
 		return;
 	}
@@ -529,7 +529,7 @@ void Service::setServiceStatus(const ISC_STATUS* status_vector)
 void Service::setServiceStatus(const USHORT facility, const USHORT errcode,
 	const MsgFormat::SafeArg& args)
 {
-	if (checkForShutdown())
+	if (checkForShutdown() || checkForFailedStart())
 	{
 		return;
 	}
@@ -974,6 +974,22 @@ bool Service::checkForShutdown()
 }
 
 
+bool Service::checkForFailedStart()
+{
+	if ((svc_flags & SVC_evnt_fired) == 0)
+	{
+		// Service has not been started but we have got an error
+		svc_flags |= SVC_failed_start;
+	}
+	else if ((svc_flags & SVC_failed_start) != 0)
+	{
+		// Service has started with an error but we are trying to write one more error
+		return true;
+	}
+
+	return false;
+}
+
 void Service::cancel(thread_db* /*tdbb*/)
 {
 	svc_shutdown_request = true;

src/jrd/svc.h

@@ -99,6 +99,7 @@ const int SVC_finished		= 0x10;
 //const int SVC_thd_running	= 0x20;
 const int SVC_evnt_fired	= 0x40;
 const int SVC_cmd_line		= 0x80;
+const int SVC_failed_start	= 0x100;
 
 // forward decl.
 class thread_db;
@@ -245,6 +246,8 @@ class Service : public Firebird::UtilSvc, public TypedHandle<type_svc>
 	void	finish(USHORT flag);
 	// Throws shutdown exception if global flag is set for it
 	bool	checkForShutdown();
+	// Check for the existence of errors in the service that has not started
+	bool	checkForFailedStart();
 	// Transfer data from svc_stdout into buffer
 	void	get(UCHAR* buffer, USHORT length, USHORT flags, USHORT timeout, USHORT* return_length);
 	// Sends stdin for a service