On Thu, 28 Dec 2023 at 17:24, Sam Varshavchik <[email protected]> wrote:
> Stephen Smoogen writes:
>
> > I am trying to figure out the logic of this section:
> >
> >
> > ```
> >
> > static char * lastUname = NULL; // So lastUname is NULL
> > static uid_t lastUid;
> >
> > if (!thisUname) {
> > lastUname = rfree(lastUname); // lastUname should still be NULL
> and
> > we are freeing NULL and setting itself back to NULL.
> > return -1;
> >
> > ```
> >
> >
> >
> > I expect this is where I am not understanding something basic in C from
> too
> > many years in non-pointer land. I looked at the change of these lines
> and
> > they date back to this commit.
>
> This is a fairly common kind of simple caching to avoid expensive
> username/userid and groupname/groupid lookups by caching the last one.
> This
Yeah I completely forgot that static allows for caching so I was misreading
this as 'always set to NULL at the beginning.'
>
> https://github.com/rpm-software-management/rpm/issues/2826
>
>
>
And thanks for opening a bug. I will watch to see what happens.
--
Stephen Smoogen, Red Hat Automotive
Let us be kind to one another, for most of us are fighting a hard battle.
-- Ian MacClaren
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