[issue7900] posix.getgroups() failure on Mac OS X

[Alexander Belopolsky]

Alexander Belopolsky <alexander.belopolsky at gmail.com> added the comment:

E-mail to tracker handling still seems to remove '>' quoted lines.   I am reposting a couple of comments that got clobbered:

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> * allocate an array of groupcount gid_t's and call getgroups(groupcount)
>
This is more or less what my original patch did, but it suffers from a
race condition.

> I'll work on a patch that implements this.
>
I am attaching a patch that I wrote yesterday, but did not submit
because it does not fix setgroups.  I am attaching it now so that we
can compare our approaches.

--


> Wrt. the value of MAX_GROUPS on Linux: we could change the test that defined > MAX_GROUPS to ensure that the value doesn't get too large, from:
>
> #ifdef NGROUPS_MAX
>
>
> to:
>
> #if defined(NGROUPS_MAX) && NGROUPS_MAX <= 64
>
> This combined with my patch would result in less stack usage while still working > when a user has a lot of secondary groups.
>
Makes sense regardless of the approach.

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<http://bugs.python.org/issue7900>
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