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Date: Mon, 10 Jul 2017 16:44:45 +0200
From: Jens Gustedt <jens.gustedt@...ia.fr>
To: musl@...ts.openwall.com
Subject: Re: [PATCH] handle whitespace before %% in scanf
Hello Bartosz,
On Mon, 10 Jul 2017 10:22:37 +0200 Bartosz Brachaczek
<b.brachaczek@...il.com> wrote:
> > EXAMPLE 5 The call:
> >
> > #include <stdio.h>
> > /* ... */
> > int n, i;
> > n = sscanf("foo % bar 42", "foo%%bar%d", &i);
> >
> > will assign to 'n' the value 1 and to 'i' the value 42 because input
> > white-space characters are skipped for both the '%' and 'd'
> > conversion specifiers.
>
> Now, the code in the example is clearly broken, as either the format
> string should be "foo%% bar%d" or the input string should be
> "foo %bar 42", but the explanation does imply that '%%' consumes
> whitespace.
Yes, I have noted this as an editorial fix for C17
Thanks for reporting
Jens
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