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Possible Duplicate:
How to get drive label in Linux using C from userspace
How can I obtain label of a disk by its file name (/dev/sda1, e.g.) in a program written in C/C++?
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You can code the C or C++ equivalent of this command:
That is,
stat()the device file you care about and remember its inode number. Iterate over all of the files in /dev/disk/by-label, andstat()each of them. When the inode number matches, then the name of the matched file is the label of that disk.If it were me, I'd code the above algorithm in C++, using Boost.Filesystem.