+debug_t debug_level = DEBUG_NOTHING;
+static logmode_t logmode = LOGMODE_STDERR;
+static pid_t logpid;
+#ifdef HAVE_MINGW
+static HANDLE loghandle = NULL;
+#endif
+static const char *logident = NULL;
+
+static void real_logger(int level, int priority, const char *message) {
+ char timestr[32] = "";
+ static bool suppress = false;
+
+ // Bail out early if there is nothing to do.
+ if(suppress)
+ return;
+
+ if(level > debug_level || logmode == LOGMODE_NULL)
+ return;
+
+ if(level <= debug_level) {
+ switch(logmode) {
+ case LOGMODE_STDERR:
+ fprintf(stderr, "%s\n", message);
+ fflush(stderr);
+ break;
+ case LOGMODE_SYSLOG:
+#ifdef HAVE_MINGW
+ {
+ const char *messages[] = {message};
+ ReportEvent(loghandle, priority, 0, 0, NULL, 1, 0, messages, NULL);
+ }
+#else
+#ifdef HAVE_SYSLOG_H
+ syslog(priority, "%s", message);
+#endif
+#endif
+ break;
+ case LOGMODE_NULL:
+ break;
+ }
+ }
+}
+
+void logger(int level, int priority, const char *format, ...) {
+ va_list ap;
+ char message[1024] = "";
+
+ va_start(ap, format);
+ int len = vsnprintf(message, sizeof message, format, ap);
+ va_end(ap);
+
+ if(len > 0 && len < sizeof message && message[len - 1] == '\n')
+ message[len - 1] = 0;
+
+ real_logger(level, priority, message);
+}