some things needed for testing syscalls

[Marc Spitzer]

Hello,

I am trying to get some unit tests done for what is covered in man 2.
I am currently working on file system calls, link etc.  I think the
project will need to add two users and one, possibly two, groups to
the base system.  The reason for this is that we need to test various
use cases for the users interacting with the file system and with each
other, as well as with root.  I am curious what you think in the
matter?

Thanks,

marc
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