From 01f70bfd8403159925a1a95b971761e16a04d702 Mon Sep 17 00:00:00 2001
From: Arvid Norberg <arvid@libtorrent.org>
Date: Thu, 18 Oct 2012 15:14:18 +0000
Subject: [PATCH] add session logging function

---
 include/libtorrent/aux_/session_impl.hpp |  2 ++
 src/session_impl.cpp                     | 15 +++++++++++++++
 2 files changed, 17 insertions(+)

diff --git a/include/libtorrent/aux_/session_impl.hpp b/include/libtorrent/aux_/session_impl.hpp
index f3fd8b89e..974aad5dd 100644
--- a/include/libtorrent/aux_/session_impl.hpp
+++ b/include/libtorrent/aux_/session_impl.hpp
@@ -1116,6 +1116,8 @@ namespace libtorrent
 			boost::shared_ptr<logger> create_log(std::string const& name
 				, int instance, bool append = true);
 			
+			void session_log(char const* fmt, ...) const;
+
 			// this list of tracker loggers serves as tracker_callbacks when
 			// shutting down. This list is just here to keep them alive during
 			// whe shutting down process
diff --git a/src/session_impl.cpp b/src/session_impl.cpp
index 12629b4ad..b44780b53 100644
--- a/src/session_impl.cpp
+++ b/src/session_impl.cpp
@@ -4765,6 +4765,21 @@ retry:
 		// current options are file_logger, cout_logger and null_logger
 		return boost::shared_ptr<logger>(new logger(m_logpath, name, instance, append));
 	}
+
+	void session_impl::session_log(char const* fmt, ...) const
+	{
+		if (!m_logger) return;
+
+		va_list v;	
+		va_start(v, fmt);
+	
+		char usr[400];
+		vsnprintf(usr, sizeof(usr), fmt, v);
+		va_end(v);
+		char buf[450];
+		snprintf(buf, sizeof(buf), "%s: %s\n", time_now_string(), usr);
+		(*m_logger) << buf;
+	}
 #endif
 
 	void session_impl::get_torrent_status(std::vector<torrent_status>* ret