-FILE *fn_open (const char *fn, const char *mode);
-int fn_close (const char *fn, FILE *file);
-
-struct file_identity *fn_get_identity (const char *file_name);
-void fn_free_identity (struct file_identity *);
-int fn_compare_file_identities (const struct file_identity *,
- const struct file_identity *);
-unsigned int fn_hash_identity (const struct file_identity *);
+FILE *fn_open (const struct file_handle *fn, const char *mode);
+int fn_close (const struct file_handle *fn, FILE *file);