+
+/* Returns the WHO response. The return string is allocated in this
+ * function and will need to be free'd by the caller.
+ *
+ * Locking: The server mutex will be acquired and held throughout the
+ * execution of this function. Each client mutex may also be acquired
+ * and held by functions called during the execution of this function.
+ *
+ * Errors: If an error such as an IO error occurs, this function will
+ * not return.
+ */
+const char*
+ttt_server_who (ttt_server_t *server);
+