getgrouplist implementation

[Ulrich Drepper]

Mark Kettenis <kettenis@wins.uva.nl> writes:

> Here is a patch that implements getgrouplist() from 4.4 BSD.  We
> really need this to handle supplementary group ID's in the Hurd and
> implementing it outside glibc would be pretty hard.

Give me some more details, please.  I've never come across a situation
where it is used and don't want to add cruft for all platforms just
because BSD did it.

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