added info command

ChangeLog.md

@@ -22,6 +22,7 @@
 * added data type HCD (for Ochsner)
 * added log entry for scan completion
 * automatically invalidate cached data of messages with same name+circuit (ignoring level)
+* added "info" command
 
 ## Changed files
 https://github.com/john30/ebusd/compare/v1.2.0...master

src/ebusd/mainloop.cpp

@@ -202,6 +202,8 @@ string MainLoop::decodeMessage(const string& data, const bool isHttp, bool& conn
 		return executeStop(args, running);
 	if (strcasecmp(str, "Q") == 0 || strcasecmp(str, "QUIT") == 0)
 		return executeQuit(args, connected);
+	if (strcasecmp(str, "I") == 0 || strcasecmp(str, "INFO") == 0)
+		return executeInfo(args);
 	if (strcasecmp(str, "H") == 0 || strcasecmp(str, "HELP") == 0)
 		return executeHelp();
 	return "ERR: command not found";
@@ -829,6 +831,26 @@ string MainLoop::executeStop(vector<string> &args, bool& running)
 		   " Stop the daemon.";
 }
 
+string MainLoop::executeInfo(vector<string> &args)
+{
+	if (args.size() == 0)
+		return "usage: info\n"
+			   " Report information about the daemon.";
+
+	ostringstream result;
+	result << "version: " << PACKAGE_STRING << "\n";
+	if (m_busHandler->hasSignal()) {
+		result << "signal: acquired\n";
+		result << "symbol rate: " << static_cast<unsigned>(m_busHandler->getSymbolRate()) << "\n";
+	} else {
+		result << "signal: no signal\n";
+	}
+	result << "masters: " << static_cast<unsigned>(m_busHandler->getMasterCount()) << "\n";
+	result << "messages: " << static_cast<unsigned>(m_messages->size());
+
+	return result.str();
+}
+
 string MainLoop::executeQuit(vector<string> &args, bool& connected)
 {
 	if (args.size() == 1) {
@@ -862,6 +884,7 @@ string MainLoop::executeHelp()
 		   " dump     Toggle dumping raw bytes\n"
 		   " reload   Reload CSV config files\n"
 		   " stop     Stop the daemon\n"
+		   " info|i   Report information about the daemon\n"
 		   " quit|q   Close connection\n"
 		   " help|h   Print help             help [COMMAND]";
 }

src/ebusd/mainloop.h

@@ -201,6 +201,13 @@ private:
 	 */
 	string executeStop(vector<string> &args, bool& running);
 
+	/**
+	 * Execute the info command.
+	 * @param args the arguments passed to the command (starting with the command itself), or empty for help.
+	 * @return the result string.
+	 */
+	string executeInfo(vector<string> &args);
+
 	/**
 	 * Execute the quit command.
 	 * @param args the arguments passed to the command (starting with the command itself), or empty for help.