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Thanks James!


3rdparty/libprocess/3rdparty/stout/include/stout/os.hpp
<https://reviews.apache.org/r/33491/#comment131749>

    I'm curious why you look at EPERM here, but not in the call to `::setgid` 
above and `::setuid` below? Is it possible for only some of these calls to fail 
with EPERM?


- Ben Mahler


On April 23, 2015, 8:16 p.m., James Peach wrote:
> 
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> https://reviews.apache.org/r/33491/
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> 
> (Updated April 23, 2015, 8:16 p.m.)
> 
> 
> Review request for mesos, Ben Mahler and Timothy St. Clair.
> 
> 
> Bugs: MESOS-719
>     https://issues.apache.org/jira/browse/MESOS-719
> 
> 
> Repository: mesos
> 
> 
> Description
> -------
> 
> Make sure we call initgroups(3) after calling setgid(2) so that the
> auxiliary groups for the su'd user are set.
> 
> This is particularly important for docker support because it lets
> you add your mesos user to the docker group so it can talk to docker
> through /var/run/docker.sock (which is owned by a docker group by
> default in most installations.) Without initgroups, the Mesos user
> only has its primary GID set.
> 
> 
> Diffs
> -----
> 
>   3rdparty/libprocess/3rdparty/stout/include/stout/os.hpp 
> 02db3c587e3f9a40282405e9496bde30e251f8bb 
> 
> Diff: https://reviews.apache.org/r/33491/diff/
> 
> 
> Testing
> -------
> 
> Ran "make check" on CentOS 7 & and OS X 10.10.3.
> 
> 
> Thanks,
> 
> James Peach
> 
>

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