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Subject: Re: Bug in lrzip 0.631-1 (32 bit version) with -d -o - options
To: cygwin AT cygwin DOT com
References: <CAPJ9Yc8SQ_btEtyrZhqR22W4AUY1=xveQnM1_A0ENdyUUEgP=A AT mail DOT gmail DOT com>
From: Marco Atzeri <marco DOT atzeri AT gmail DOT com>
Message-ID: <5787b681-2927-9067-d7da-70c0e9a29c93@gmail.com>
Date: Sun, 5 Feb 2017 07:37:02 +0100
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On 25/01/2017 23:15, David Balažic wrote:
> Hi!
>
> The 32 bit version of lrzip 0.631-1 contains a bug that corrupts the
> decompressed dat in some circumstances.
>
> I reproduced the problem on 2 PCs (the md5sum of the broken output was
> the same on both systems).
>
> I seems to happen when the (de)compressed file size is bigger than the
> available RAM (note that the 32 bit version uses max 4GB in any case)
> and lrzip resorts to using a temporary file.
>
[cut]
>
>
> Simply decompressing the file (lrzip -d -o sda.img sda.img.lrz2) to
> filesystem works fine, only when piped to stdout the problem happens.
>
> The 64 bit version does not have this problem.
>
>

>
> Regards,
> David
>

can you check if latest cygwin test solves the issue ?
There was a change on pipe handling.

https://cygwin.com/ml/cygwin-announce/2017-02/msg00007.html

- Always try to write all incoming bytes to blocking pipes, as required
   by POSIX.
   Addresses: https://cygwin.com/ml/cygwin/2017-01/msg00087.html

Regards
Marco


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