Wireshark · Wireshark-dev: Re: [Wireshark-dev] File size limits on Linux and building for large file support

[Ulf Lamping <ulf.lamping@xxxxxx>]

Stephen Fisher schrieb:
> On Tue, Jun 26, 2007 at 08:27:03AM +0200, Ulf Lamping wrote:
>   
> > You'll need to compile without libz, as libz is (optionally?) used to 
> > work with capture files and it will by default use 32 bit file offsets 
> > on machines which uses 32 bits for long values. So you can compile 
> > Wireshark/Tshark without libz (configure option?) or use a 64 bit 
> > machine that uses 64bits for "long" integers.
> >     
> Would it be worth the effort to put some code in that would use the zlib 
> reading and writing functions for uncompressed/compressed use < 2GB vs. 
> normal reading and writing functions for non-compressed files of any 
> size based on a user preference?
>   
I don't know if that's possible, AFAIK the change for long file support 
is a compile time option, so you won't be able to use a user preference 
for it - unless you are working with some more magic, compiling two 
different modules and loading one of it based on that preference. 
However, that's a lot of work for a minor goal IMHO.

My preferred way would be to motivate the zlib people to support >2GB on 
"32bit long" machines "natively". However, I didn't spend any effort in 
that direction.

Regards, ULFL