-int cf_read (CFile cf, int no, int offset, int nbytes, void *buf);
-int cf_write (CFile cf, int no, int offset, int nbytes, const void *buf);
-void cf_unlink (CFile cf);
-void cf_commit (CFile cf);
+int cf_read (CFile cf, zint no, int offset, int nbytes, void *buf);
+int cf_write (CFile cf, zint no, int offset, int nbytes, const void *buf);
+int cf_commit (CFile cf) ZEBRA_GCC_ATTR((warn_unused_result));