+void fh_init (void);
+void fh_done (void);
+
+/* Creating file handles. */
+struct file_handle *fh_create_file (const char *handle_name,
+ const char *filename,
+ const struct fh_properties *);
+struct file_handle *fh_create_scratch (const char *handle_name);
+const struct fh_properties *fh_default_properties (void);
+
+/* Delete file handle from global list. */
+void fh_free (struct file_handle *);
+
+/* Finding file handles. */
+struct file_handle *fh_from_name (const char *handle_name);
+struct file_handle *fh_from_filename (const char *filename);
+struct file_handle *fh_inline_file (void);
+
+/* Generic properties of file handles. */
+const char *fh_get_name (const struct file_handle *);
+enum fh_referent fh_get_referent (const struct file_handle *);
+
+/* Properties of FH_REF_FILE file handles. */
+const char *fh_get_filename (const struct file_handle *);
+enum fh_mode fh_get_mode (const struct file_handle *) ;
+
+/* Properties of FH_REF_FILE and FH_REF_INLINE file handles. */
+size_t fh_get_record_width (const struct file_handle *);
+size_t fh_get_tab_width (const struct file_handle *);
+
+/* Properties of FH_REF_SCRATCH file handles. */
+struct scratch_handle *fh_get_scratch_handle (struct file_handle *);
+void fh_set_scratch_handle (struct file_handle *, struct scratch_handle *);
+
+/* Opening and closing file handles. */
+void **fh_open (struct file_handle *, enum fh_referent mask,
+ const char *type, const char *mode);
+int fh_close (struct file_handle *, const char *type, const char *mode);
+bool fh_is_open (const struct file_handle *);
+
+/* Default file handle for DATA LIST, REREAD, REPEATING DATA
+ commands. */
+struct file_handle *fh_get_default_handle (void);
+void fh_set_default_handle (struct file_handle *);