create pidfile (#43)

Author: henkwiedig

src/main.cpp

@@ -552,6 +552,11 @@ int main(int argc, char **argv)
 
 	osd_vars.enable_recording = 0;
 
+    std::string pidFilePath = "/run/pixelpilot.pid";
+    std::ofstream pidFile(pidFilePath);
+    pidFile << getpid();
+    pidFile.close();
+
 	// Load console arguments
 	__BeginParseConsoleArguments__(printHelp) 
 
@@ -896,5 +901,7 @@ int main(int argc, char **argv)
 	modeset_cleanup(drm_fd, output_list);
 	close(drm_fd);
 
+    remove(pidFilePath.c_str());
+
 	return 0;
 }