if (size > (off_t) disk_size (src) * DISK_SECTOR_SIZE)
PANIC ("source disk is too small for %Ld-byte file",
(unsigned long long) size);
if (size > (off_t) disk_size (src) * DISK_SECTOR_SIZE)
PANIC ("source disk is too small for %Ld-byte file",
(unsigned long long) size);