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+/*
+ * Copyright (c) 2014, Peter Thorson. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * * Neither the name of the WebSocket++ Project nor the
+ * names of its contributors may be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL PETER THORSON BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *
+ * The initial version of this logging policy was contributed to the WebSocket++
+ * project by Tom Hughes.
+ */
+
+#ifndef WEBSOCKETPP_LOGGER_SYSLOG_HPP
+#define WEBSOCKETPP_LOGGER_SYSLOG_HPP
+
+#include <syslog.h>
+
+#include <websocketpp/logger/basic.hpp>
+
+#include <websocketpp/common/cpp11.hpp>
+#include <websocketpp/logger/levels.hpp>
+
+namespace websocketpp {
+namespace log {
+
+/// Basic logger that outputs to syslog
+template <typename concurrency, typename names>
+class syslog : public basic<concurrency, names> {
+public:
+ typedef basic<concurrency, names> base;
+
+ /// Construct the logger
+ /**
+ * @param hint A channel type specific hint for how to construct the logger
+ */
+ syslog<concurrency,names>(channel_type_hint::value hint =
+ channel_type_hint::access)
+ : basic<concurrency,names>(hint), m_channel_type_hint(hint) {}
+
+ /// Construct the logger
+ /**
+ * @param channels A set of channels to statically enable
+ * @param hint A channel type specific hint for how to construct the logger
+ */
+ syslog<concurrency,names>(level channels, channel_type_hint::value hint =
+ channel_type_hint::access)
+ : basic<concurrency,names>(channels, hint), m_channel_type_hint(hint) {}
+
+ /// Write a string message to the given channel
+ /**
+ * @param channel The channel to write to
+ * @param msg The message to write
+ */
+ void write(level channel, std::string const & msg) {
+ write(channel, msg.c_str());
+ }
+
+ /// Write a cstring message to the given channel
+ /**
+ * @param channel The channel to write to
+ * @param msg The message to write
+ */
+ void write(level channel, char const * msg) {
+ scoped_lock_type lock(base::m_lock);
+ if (!this->dynamic_test(channel)) { return; }
+ ::syslog(syslog_priority(channel), "[%s] %s",
+ names::channel_name(channel), msg);
+ }
+private:
+ typedef typename base::scoped_lock_type scoped_lock_type;
+
+ /// The default level is used for all access logs and any error logs that
+ /// don't trivially map to one of the standard syslog levels.
+ static int const default_level = LOG_INFO;
+
+ /// retrieve the syslog priority code given a WebSocket++ channel
+ /**
+ * @param channel The level to look up
+ * @return The syslog level associated with `channel`
+ */
+ int syslog_priority(level channel) const {
+ if (m_channel_type_hint == channel_type_hint::access) {
+ return syslog_priority_access(channel);
+ } else {
+ return syslog_priority_error(channel);
+ }
+ }
+
+ /// retrieve the syslog priority code given a WebSocket++ error channel
+ /**
+ * @param channel The level to look up
+ * @return The syslog level associated with `channel`
+ */
+ int syslog_priority_error(level channel) const {
+ switch (channel) {
+ case elevel::devel:
+ return LOG_DEBUG;
+ case elevel::library:
+ return LOG_DEBUG;
+ case elevel::info:
+ return LOG_INFO;
+ case elevel::warn:
+ return LOG_WARNING;
+ case elevel::rerror:
+ return LOG_ERR;
+ case elevel::fatal:
+ return LOG_CRIT;
+ default:
+ return default_level;
+ }
+ }
+
+ /// retrieve the syslog priority code given a WebSocket++ access channel
+ /**
+ * @param channel The level to look up
+ * @return The syslog level associated with `channel`
+ */
+ _WEBSOCKETPP_CONSTEXPR_TOKEN_ int syslog_priority_access(level) const {
+ return default_level;
+ }
+
+ channel_type_hint::value m_channel_type_hint;
+};
+
+} // log
+} // websocketpp
+
+#endif // WEBSOCKETPP_LOGGER_SYSLOG_HPP