+void cf_register(struct cfitem *items);
+
+/*
+ * Direct setting of configuration items and parsing the configuration file.
+ */
+
+int cf_item_count(void);
+struct cfitem *cf_get_item(byte *sect, byte *name);
+byte *cf_set_item(byte *sect, byte *name, byte *value);
+void cf_read(byte *filename);
+
+/*
+ * Number parsing functions which could be useful in CT_FUNCTION callbacks.
+ */
+
+byte *cf_parse_int(byte *value, uns *varp);
+byte *cf_parse_u64(byte *value, u64 *varp);
+byte *cf_parse_double(byte *value, double *varp);
+
+/*
+ * When using cf_getopt, you must prefix your own short/long options by the
+ * CF_(SHORT|LONG)_OPTS.
+ *
+ * cfdeffile contains filename of config file automatically loaded before a
+ * first --set option is executed. If none --set option occures, it will be
+ * loaded after getopt returns -1 (at the end of configuration options). It
+ * will be ignored, if another config file is set by --config option at first.
+ * Its initial value is DEFAULT_CONFIG from config.h, but you can override it
+ * manually.
+ */
+
+#define CF_SHORT_OPTS "S:C:"
+#define CF_LONG_OPTS \
+ {"set", 1, 0, 'S'},\
+ {"config", 1, 0, 'C'},
+#define CF_NO_LONG_OPTS (const struct option []){ CF_LONG_OPTS { NULL, 0, 0, 0 } }
+#define CF_USAGE \
+"-S, --set sec.item=val\tManual setting of a configuration item\n\
+-C, --config filename\tOverwrite default config filename\n"
+
+extern byte *cfdeffile;