+/*
+ * Parses the time parameters "begin" and "end" and returns the specified time
+ * in epoch in the longs pointed to by "ret_begin" and "ret_end". Returns
+ * non-zero on failure. If the optional "ret_now" pointer is not-NULL, the
+ * current time will be assigned to it.
+ */
+int get_time_args (long *ret_begin, long *ret_end,
+ long *ret_now);
+