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3rdparty/stout/include/stout/os/posix/su.hpp (line 177)
<https://reviews.apache.org/r/47667/#comment202561>

    Bear in mind that ``SC_NGROUPS_MAX`` is not meaningful on Darwin other than 
it is the number of groups returned by ``getgroups(2)``. I don't remembee 
whether ``getgrouplist(3)`` gives you the fill list, but the manpage sounds 
promising.
    
    AFAICT this code will always truncate the list at 16.


- James Peach


On June 13, 2016, 11:50 p.m., Gilbert Song wrote:
> 
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> This is an automatically generated e-mail. To reply, visit:
> https://reviews.apache.org/r/47667/
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> (Updated June 13, 2016, 11:50 p.m.)
> 
> 
> Review request for mesos, Artem Harutyunyan, Jie Yu, James Peach, Kevin 
> Klues, and Timothy Chen.
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> 
> Repository: mesos
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> 
> Description
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> Added stout functions to get and set supplementary groud ids.
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> 
> Diffs
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>   3rdparty/stout/include/stout/os/posix/su.hpp 
> 0a3f23918be9f4d0b044cd9c45001114bc36fce5 
> 
> Diff: https://reviews.apache.org/r/47667/diff/
> 
> 
> Testing
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> make check
> 
> 
> Thanks,
> 
> Gilbert Song
> 
>

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