xzgrep: incomplete results on larger files

[Stefan Ehmann]

On 29.09.2014 16:14, Mark Felder wrote:
>
>
> On Sat, Sep 20, 2014, at 15:56, Stefan Ehmann wrote:
>> I observed the following behavior on 10.1-BETA1 r271683M (amd64):
>>
>> xzgrep doesn't search the complete file:
>> $ seq 10000 | xz > seq.xz
>> $ xzgrep -c . seq.xz
>> 6775
>>
>> Using regular grep works as expected:
>> $ xzcat seq.xz | grep -c .
>> 10000
>>
>> Processing seems to stop after 32KB (uncompressed).
>>
>
> Wow, this is bizarre... Compression with xz is getting more and more
> popular. This may have bit me a few times and I didn't even know it!
>
> I'll see what I can to do bring this to someone's attention.

I've looked further into this issue.

The original approach could never have worked since the xz library was 
used incorrectly.

I came up with this patch today:
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=186861

It's getting late. So it's not tested very much and might contain bugs.

-- 
Stefan