Index: ext/libicpf/src/log.h
===================================================================
diff -u -re17c80d36eaa0430313e7d1058aa7a301d1510af -r338a33bbdb8c82416f0351408eea3243520784e5
--- ext/libicpf/src/log.h	(.../log.h)	(revision e17c80d36eaa0430313e7d1058aa7a301d1510af)
+++ ext/libicpf/src/log.h	(.../log.h)	(revision 338a33bbdb8c82416f0351408eea3243520784e5)
@@ -100,8 +100,8 @@
 public:
 /** \name Construction/destruction */
 /**@{*/
-	log_file();		///< Standard constructor
-	~log_file();	///< Standard destructor
+	explicit log_file(bool bGlobal=false);		///< Standard constructor
+	~log_file();				///< Standard destructor
 /**@}*/
 	
 /** \name Initialization */
@@ -141,6 +141,9 @@
 
 	void loge(const char_t* pszStr, ...);		///< Logs an error message with formatting
 	void loges(const char_t* pszStr, ...);	///< Logs an error message with formatting(also prints to stderr)
+
+	void logerr(const char_t* pszStr, int iSysErr, ...);	///< Logs an error message with system error number and error description
+	void logerrs(const char_t* pszStr, int iSysErr, ...);	///< Logs an error message with system error number and error description (also prints to stderr)
 /**@}*/
 
 	/// Gets the global instance of the log file
@@ -152,16 +155,21 @@
 	
 protected:
 	/// Truncates a log file not to exceed the max file size
-	bool truncate(int_t iAdd);
+	bool truncate(int_t iAdd) const;
 	/// Returns the size of a log file
-	int_t size();
+	int_t size() const;
+
+private:
+	/// Prepares a new format string for logerr(s) functions
+	bool prepare_fmt(const char_t* pszStr, int iSysErr, char_t* pszOut) const;
 	
-public:
+protected:
 	char_t* m_pszPath;	///< Path to the log file
 	int_t m_iMaxSize;	///< Maximum size of the log file
 	bool m_bLogStd;		///< Log also to stdout/stderr
 	int_t m_iLogLevel;	///< Log level (similar to the _LOG_LEVEL, but change'able after compilation)
-	
+	bool m_bGlobal;		///< Is this the global instance of app log ? (so the LOG* macros would use it)
+
 protected:
 	mutex m_lock;		///< Lock for making the class thread safe
 };