+/*----- Privilege separation ----------------------------------------------*/
+
+/* --- @ps_trace@ --- *
+ *
+ * Arguments: @unsigned mask@ = trace mask to check
+ * @const char *fmt@ = message format
+ * @...@ = values for placeholders
+ *
+ * Returns: ---
+ *
+ * Use: Writes a trace message.
+ */
+
+T( extern void PRINTF_LIKE(2, 3)
+ ps_trace(unsigned /*mask*/, const char */*fmt*/, ...); )
+
+/* --- @ps_warn@ --- *
+ *
+ * Arguments: @const char *fmt@ = message format
+ * @...@ = values for placeholders
+ *
+ * Returns: ---
+ *
+ * Use: Writes a warning message.
+ */
+
+extern void PRINTF_LIKE(1, 2) ps_warn(const char */*fmt*/, ...);
+
+/* --- @ps_tunfd@ --- *
+ *
+ * Arguments: @const tunnel_ops *tops@ = pointer to tunnel operations
+ * @char **ifn@ = where to put the interface name
+ *
+ * Returns: The file descriptor, or @-1@ on error.
+ *
+ * Use: Fetches a file descriptor for a tunnel driver.
+ */
+
+extern int ps_tunfd(const tunnel_ops */*tops*/, char **/*ifn*/);
+
+/* --- @ps_split@ --- *
+ *
+ * Arguments: @int detachp@ = whether to detach the child from its terminal
+ *
+ * Returns: ---
+ *
+ * Use: Separates off the privileged tunnel-opening service from the
+ * rest of the server.
+ */
+
+extern void ps_split(int /*detachp*/);
+
+/* --- @ps_quit@ --- *
+ *
+ * Arguments: ---
+ *
+ * Returns: ---
+ *
+ * Use: Detaches from the helper process.
+ */
+
+extern void ps_quit(void);
+