/etc/groups is not needed when specifying numeric group ids. This
change allows containers without /etc/groups to specify numeric
supplemental groups.
Signed-off-by: Sami Wagiaalla <swagiaal@redhat.com>
Update the tests to use the test-friendly GetAdditionalGroups API,
rather than making random files for no good reason.
Signed-off-by: Aleksa Sarai <cyphar@cyphar.com>
The old GetAdditionalGroups* API didn't match the rest of
libcontainer/user, we make functions that take io.Readers and then make
wrappers around them. Otherwise we have to do dodgy stuff when testing
our code.
Fixes: d4ece29c0b ("refactor GetAdditionalGroupsPath")
Signed-off-by: Aleksa Sarai <cyphar@cyphar.com>
Sami Wagiaalla
Aleksa Sarai
Michael Crosby