On Tue, Sep 16, 2008 at 3:41 AM, Sergio Callegari
<sergio.callegari@xxxxxxxxx> wrote:
> Johannes Sixt wrote:
>>
>> You don't need a temporay zip filename in filter mode:
>>
>> unzip $UNZIP_OPTS /dev/stdin # works for me, but not 100% portable
>> zip $ZIP_OPTS - . # writes to stdout
>>
>>
>
> The unzip documentation says "Archives read from standard input are not yet
> supported", so I was a bit worried about using the /dev/stdin thing. Might
> it be that there are subtle cases where unzip needs to seek or rewind?
IIRC zip files keep their index at the end of the file, which means
zipping in a pipeline is efficient (you can write all the blocks
first, then drop the final index at the end) but unzipping that way is
really hard.
unzipping from /dev/stdin seems to work if stdin is seekable, otherwise not.
unzip /dev/stdin <filename.zip # works
cat filename.zip | unzip /dev/stdin # doesn't work
Have fun,
Avery
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