-int rmt_read__ PARAMS ((int, char *, unsigned int));
-int rmt_write__ PARAMS ((int, char *, unsigned int));
-long rmt_lseek__ PARAMS ((int, off_t, int));
+ssize_t rmt_read__ PARAMS ((int, char *, size_t));
+ssize_t rmt_write__ PARAMS ((int, char *, size_t));
+off_t rmt_lseek__ PARAMS ((int, off_t, int));