# Wrong tape argument
./mt -f /dev/no-such-tape rewind
>>>2 /no-such-tape: No such file or directory/
>>>= 1

# Wrong file in show options
./mt -f tests/data/not-a-char-device stshowoptions
>>>2 /mt: not a character device/
>>>= 1

# /dev/null is not a tape device. Error message is ugly, though.
./mt -f /dev/null stshowoptions
>>>2 /Can't read the sysfs file '\/sys\/class\/scsi_tape/
>>>= 2

# /dev/null is not a tape device, so status fails.
./mt -f /dev/null status
>>>2 /Inappropriate ioctl for device/
>>>= 2