void free_volume_lists();
void list_volumes(void sendit(const char *msg, int len, void *sarg), void *arg);
bool is_volume_in_use(DCR *dcr);
-void debug_list_volumes(const char *imsg);
extern int vol_list_lock_count;
void add_read_volume(JCR *jcr, const char *VolumeName);
void remove_read_volume(JCR *jcr, const char *VolumeName);