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Date: Fri, 13 Jul 2018 18:19:30 -0400
From: Christopher Friedt <>
Subject: Re: Possible oversight in setvbuf()

On Fri, Jul 13, 2018, 6:06 PM Rich Felker, <> wrote:

> On Fri, Jul 13, 2018 at 05:46:54PM -0400, Christopher Friedt wrote:
> > A good process for adding new features is to add tests with them. Even if
> > there is only a test for expected behaviour, at least it will catch one
> > possible regression.
> Yes, I should really do that more. Sometimes it's not obvious what
> should be tested though. In the case of setvbuf, the intended behavior
> is in some sense untestable (the previous implementation not using the
> caller-provided buffer was valid); in hindsight the obvious important
> thing to test is that it doesn't result in writes outside the buffer.

If you need more than that basic test.c program that I provided before for
addrconfig, i'd be happy to add some more test cases.


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