+
+int get_timezone(char **tz) {
+ _cleanup_free_ char *t = NULL;
+ const char *e;
+ char *z;
+ int r;
+
+ r = readlink_malloc("/etc/localtime", &t);
+ if (r < 0)
+ return r; /* returns EINVAL if not a symlink */
+
+ e = path_startswith(t, "/usr/share/zoneinfo/");
+ if (!e)
+ e = path_startswith(t, "../usr/share/zoneinfo/");
+ if (!e)
+ return -EINVAL;
+
+ if (!timezone_is_valid(e))
+ return -EINVAL;
+
+ z = strdup(e);
+ if (!z)
+ return -ENOMEM;
+
+ *tz = z;
+ return 0;
+}
+
+time_t mktime_or_timegm(struct tm *tm, bool utc) {
+ return utc ? timegm(tm) : mktime(tm);
+}
+#endif // 0
+
+struct tm *localtime_or_gmtime_r(const time_t *t, struct tm *tm, bool utc) {
+ return utc ? gmtime_r(t, tm) : localtime_r(t, tm);
+}
+
+#if 0 /// UNNEEDED by elogind
+unsigned long usec_to_jiffies(usec_t u) {
+ static thread_local unsigned long hz = 0;
+ long r;
+
+ if (hz == 0) {
+ r = sysconf(_SC_CLK_TCK);
+
+ assert(r > 0);
+ hz = (unsigned long) r;
+ }
+
+ return DIV_ROUND_UP(u , USEC_PER_SEC / hz);
+}