+struct tm* clock_gettime_for_tz(const char* timezone) {
+ if (timezone) {
+ const char* old_tz = getenv("TZ");
+ setenv("TZ", timezone, 1);
+ struct tm* result = localtime(&time_clock.tv_sec);
+ if (old_tz) setenv("TZ", old_tz, 1);
+ else unsetenv("TZ");
+ return result;
+ }
+ else return localtime(&time_clock.tv_sec);
+}