bool weof(int num); /* in dev.c */
void lock_door(); /* in dev.c */
void unlock_door(); /* in dev.c */
+ int32_t get_os_tape_file(); /* in dev.c */
bool scan_dir_for_volume(DCR *dcr); /* in scan.c */
bool reposition(DCR *dcr, uint32_t rfile, uint32_t rblock); /* in dev.c */
void clrerror(int func); /* in dev.c */