I want to know what the current timestamp is. The best I can do thus far is define my own function that does this:
(int (/ (.getTime (java.util.Date.)) 1000))
Is there a standard function for fetching the Unix timestamp with clojure?
Pretty much all JVM-based timestamp mechanisms measure time as milliseconds since the epoch - so no, nothing standard** that will give seconds since epoch.
Your function can be slightly simplified as:
(quot (System/currentTimeMillis) 1000)
** Joda might have something like this, but pulling in a third-party library for this seems like overkill.