+static bool debug;
+
+static void __log(const char *fmt, va_list ap)
+{
+ char hms[20] = {'\0'};
+ time_t t;
+
+ if (!logf)
+ return;
+
+ /* Add timestamp */
+ t = time(NULL);
+ strftime(hms, sizeof(hms), "%T", localtime(&t));
+ fprintf(logf, "[%s] ", hms);
+
+ vfprintf(logf, fmt, ap);
+ fflush(logf);
+}