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Postings from December 2010
On Thu, Dec 30, 2010 at 10:16 PM, Paul LeoNerd Evans
<leonerd@leonerd.org.uk> wrote:
> Purely idle speculation, but if $$ behaves this way currently, what of
> $< $> $( $) ? Do these cache their values, or are they magical to
> get{,e}{u,g}id() ?
>
> I'll go off sourcediving in a moment once I've finished some unrelated
> stuff and take a look...
Those seem to be cached in PL_uid, PL_euid, PL_gid and PL_egid. The
latter two have the interesting feature of having the numerical value
from that cache but its string value is fresh from getgroups(3) if
that is available. I haven't tested it, but I suspect they have
similar issues. Some other codepaths also use those variables, so
simply getting rid of them is unlikely to solve the problem. Unlike $$
I've never heard of a anyone who ran into issues due to this though.
Leon
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