typedef int (*dirwalk_callback_f)(const char *dirname, const char *filename,
void *user_data);
int walk_directory (const char *dir, dirwalk_callback_f callback,
- void *user_data);
+ void *user_data, int hidden);
+/* Returns the number of bytes read or negative on error. */
int read_file_contents (const char *filename, char *buf, int bufsize);
counter_t counter_diff (counter_t old_value, counter_t new_value);
* (in the range [1-65535]). Returns less than zero on error. */
int service_name_to_port_number (const char *service_name);
+/** Parse a string to a derive_t value. Returns zero on success or non-zero on
+ * failure. If failure is returned, ret_value is not touched. */
+int strtoderive (const char *string, derive_t *ret_value);
+
#endif /* COMMON_H */