SyslogLogger: Implement option to set syslog facility

fixes #3964

doc/09-object-types.md

@@ -1510,7 +1510,32 @@ Configuration Attributes:
   Name            |Description
   ----------------|----------------
   severity        |**Optional.** The minimum severity for this log. Can be "debug", "notice", "information", "warning" or "critical". Defaults to "warning".
+  facility        |**Optional.** Defines the facility to use for syslog entries. This can be a facility constant like `FacilityDaemon`. Defaults to `FacilityUser`.
 
+Facility Constants:
+
+  Name                 | Facility      | Description
+  ---------------------|---------------|----------------
+  FacilityAuth         | LOG\_AUTH     | The authorization system.
+  FacilityAuthPriv     | LOG\_AUTHPRIV | The same as `FacilityAuth`, but logged to a file readable only by selected individuals.
+  FacilityCron         | LOG\_CRON     | The cron daemon.
+  FacilityDaemon       | LOG\_DAEMON   | System daemons that are not provided for explicitly by other facilities.
+  FacilityFtp          | LOG\_FTP      | The file transfer protocol daemons.
+  FacilityKern         | LOG\_KERN     | Messages generated by the kernel. These cannot be generated by any user processes.
+  FacilityLocal0       | LOG\_LOCAL0   | Reserved for local use.
+  FacilityLocal1       | LOG\_LOCAL1   | Reserved for local use.
+  FacilityLocal2       | LOG\_LOCAL2   | Reserved for local use.
+  FacilityLocal3       | LOG\_LOCAL3   | Reserved for local use.
+  FacilityLocal4       | LOG\_LOCAL4   | Reserved for local use.
+  FacilityLocal5       | LOG\_LOCAL5   | Reserved for local use.
+  FacilityLocal6       | LOG\_LOCAL6   | Reserved for local use.
+  FacilityLocal7       | LOG\_LOCAL7   | Reserved for local use.
+  FacilityLpr          | LOG\_LPR      | The line printer spooling system.
+  FacilityMail         | LOG\_MAIL     | The mail system.
+  FacilityNews         | LOG\_NEWS     | The network news system.
+  FacilitySyslog       | LOG\_SYSLOG   | Messages generated internally by syslogd.
+  FacilityUser         | LOG\_USER     | Messages generated by user processes. This is the default facility identifier if none is specified.
+  FacilityUucp         | LOG\_UUCP     | The UUCP system.
 
 ## TimePeriod <a id="objecttype-timeperiod"></a>
 

lib/base/sysloglogger.cpp

@@ -29,6 +29,55 @@ REGISTER_TYPE(SyslogLogger);
 
 REGISTER_STATSFUNCTION(SyslogLogger, &SyslogLogger::StatsFunc);
 
+INITIALIZE_ONCE(&SyslogLogger::StaticInitialize);
+
+std::map<String, int> SyslogLogger::m_FacilityMap;
+
+void SyslogLogger::StaticInitialize(void)
+{
+	ScriptGlobal::Set("FacilityAuth", "LOG_AUTH");
+	ScriptGlobal::Set("FacilityAuthPriv", "LOG_AUTHPRIV");
+	ScriptGlobal::Set("FacilityCron", "LOG_CRON");
+	ScriptGlobal::Set("FacilityDaemon", "LOG_DAEMON");
+	ScriptGlobal::Set("FacilityFtp", "LOG_FTP");
+	ScriptGlobal::Set("FacilityKern", "LOG_KERN");
+	ScriptGlobal::Set("FacilityLocal0", "LOG_LOCAL0");
+	ScriptGlobal::Set("FacilityLocal1", "LOG_LOCAL1");
+	ScriptGlobal::Set("FacilityLocal2", "LOG_LOCAL2");
+	ScriptGlobal::Set("FacilityLocal3", "LOG_LOCAL3");
+	ScriptGlobal::Set("FacilityLocal4", "LOG_LOCAL4");
+	ScriptGlobal::Set("FacilityLocal5", "LOG_LOCAL5");
+	ScriptGlobal::Set("FacilityLocal6", "LOG_LOCAL6");
+	ScriptGlobal::Set("FacilityLocal7", "LOG_LOCAL7");
+	ScriptGlobal::Set("FacilityLpr", "LOG_LPR");
+	ScriptGlobal::Set("FacilityMail", "LOG_MAIL");
+	ScriptGlobal::Set("FacilityNews", "LOG_NEWS");
+	ScriptGlobal::Set("FacilitySyslog", "LOG_SYSLOG");
+	ScriptGlobal::Set("FacilityUser", "LOG_USER");
+	ScriptGlobal::Set("FacilityUucp", "LOG_UUCP");
+
+	m_FacilityMap["LOG_AUTH"] = LOG_AUTH;
+	m_FacilityMap["LOG_AUTHPRIV"] = LOG_AUTHPRIV;
+	m_FacilityMap["LOG_CRON"] = LOG_CRON;
+	m_FacilityMap["LOG_DAEMON"] = LOG_DAEMON;
+	m_FacilityMap["LOG_FTP"] = LOG_FTP;
+	m_FacilityMap["LOG_KERN"] = LOG_KERN;
+	m_FacilityMap["LOG_LOCAL0"] = LOG_LOCAL0;
+	m_FacilityMap["LOG_LOCAL1"] = LOG_LOCAL1;
+	m_FacilityMap["LOG_LOCAL2"] = LOG_LOCAL2;
+	m_FacilityMap["LOG_LOCAL3"] = LOG_LOCAL3;
+	m_FacilityMap["LOG_LOCAL4"] = LOG_LOCAL4;
+	m_FacilityMap["LOG_LOCAL5"] = LOG_LOCAL5;
+	m_FacilityMap["LOG_LOCAL6"] = LOG_LOCAL6;
+	m_FacilityMap["LOG_LOCAL7"] = LOG_LOCAL7;
+	m_FacilityMap["LOG_LPR"] = LOG_LPR;
+	m_FacilityMap["LOG_MAIL"] = LOG_MAIL;
+	m_FacilityMap["LOG_NEWS"] = LOG_NEWS;
+	m_FacilityMap["LOG_SYSLOG"] = LOG_SYSLOG;
+	m_FacilityMap["LOG_USER"] = LOG_USER;
+	m_FacilityMap["LOG_UUCP"] = LOG_UUCP;
+}
+
 void SyslogLogger::StatsFunc(const Dictionary::Ptr& status, const Array::Ptr&)
 {
 	Dictionary::Ptr nodes = new Dictionary();
@@ -40,6 +89,33 @@ void SyslogLogger::StatsFunc(const Dictionary::Ptr& status, const Array::Ptr&)
 	status->Set("sysloglogger", nodes);
 }
 
+void SyslogLogger::OnConfigLoaded(void)
+{
+	ObjectImpl<SyslogLogger>::OnConfigLoaded();
+
+	String facilityString = GetFacility();
+
+	auto it = m_FacilityMap.find(facilityString);
+
+	if (it != m_FacilityMap.end())
+		m_Facility = it->second;
+	else
+		m_Facility = Convert::ToLong(facilityString);
+}
+
+void SyslogLogger::ValidateFacility(const String& value, const ValidationUtils& utils)
+{
+	ObjectImpl<SyslogLogger>::ValidateFacility(value, utils);
+
+	if (m_FacilityMap.find(value) == m_FacilityMap.end()) {
+		try {
+			Convert::ToLong(value);
+		} catch (const std::exception&) {
+			BOOST_THROW_EXCEPTION(ValidationError(this, boost::assign::list_of("facility"), "Invalid facility specified."));
+		}
+	}
+}
+
 /**
  * Processes a log entry and outputs it to syslog.
  *
@@ -67,7 +143,7 @@ void SyslogLogger::ProcessLogEntry(const LogEntry& entry)
 			break;
 	}
 
-	syslog(severity | LOG_USER, "%s", entry.Message.CStr());
+	syslog(severity | m_Facility, "%s", entry.Message.CStr());
 }
 
 void SyslogLogger::Flush(void)

lib/base/sysloglogger.hpp

@@ -38,9 +38,16 @@ public:
 	DECLARE_OBJECT(SyslogLogger);
 	DECLARE_OBJECTNAME(SyslogLogger);
 
+	static void StaticInitialize(void);
 	static void StatsFunc(const Dictionary::Ptr& status, const Array::Ptr& perfdata);
 
+	virtual void OnConfigLoaded(void) override;
+	virtual void ValidateFacility(const String& value, const ValidationUtils& utils) override;
+
 protected:
+	static std::map<String, int> m_FacilityMap;
+	int m_Facility;
+
 	virtual void ProcessLogEntry(const LogEntry& entry) override;
 	virtual void Flush(void) override;
 };

lib/base/sysloglogger.ti

@@ -26,6 +26,9 @@ namespace icinga
 
 class SyslogLogger : Logger
 {
+	[config] String facility {
+		default {{{ return "LOG_USER"; }}}
+	};
 };
 
 }