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Message-ID: <CAOJ3pK5Q43+BrER+9sYx7ABivXyNoGub0h1s94jPxG=i-x_Umg@mail.gmail.com>
Date: Tue, 14 Dec 2021 11:09:50 -0500
From: Andrew Snyder <arsnyder16@...il.com>
To: Andrew Snyder <arsnyder16@...il.com>, musl@...ts.openwall.com
Subject: Re: print does not support variable width plus padding
I get an error from printf i assume that underlying printf function is
returning error code. In my native implementation i get incorrect results
and really depends on the parameters i didn't dig into too deep to see what
the pattern was
On Tue, Dec 14, 2021 at 11:03 AM Szabolcs Nagy <nsz@...t70.net> wrote:
> * Andrew Snyder <arsnyder16@...il.com> [2021-12-14 10:22:42 -0500]:
> > I would like to be cc'd on the replies
> >
> > Looks like a bug in the musl printf functionality
> >
> > When using variable width format string and specifying a padding musl
> fails
> > to format properly.
> >
> > I am using musl indirectly through an emscripten compile of a native
> > library.
> >
> > Consider the following repro steps using alpine docker image. Correct
> > results exist when using ubuntu image
> >
> > # Correct expected ' 1'
> > docker run -it --rm alpine printf %2i 1
> > # Correct expected ' 1'
> > docker run -it --rm alpine printf %*i 2 1
> > # Correct expected '01'
> > docker run -it --rm alpine printf %02i 1
> > # errors, Expected '01'
> > docker run -it --rm alpine printf %0*i 2 1
>
> i get the expected result on alpine
>
> $ printf %0*i 2 1
> 01
>
> what do you get?
>
>
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