how to get a serial number of a tape drive given a device file

[Shrikar archak]

Hi Geeks,

I want a small C program which would give the serial number of a tape or a
library given the device files.
Like /dev/sg*..
The program should take the /dev/sg* as input and give the serial number of
that particular tape drive or library.
I am not sure of how to use the ioctl call to get that one done.

Thanks,
Shrikar
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