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From Saju Pillai <saju.pil...@gmail.com>
Subject Re: LD_PRELOAD for modules
Date Sat, 27 Mar 2010 10:42:38 GMT
Andrej van der Zee wrote:
> Hi William,
> 
>> LoadFile
>>
> 
> Saving on ink aren't you ;) Thanks for the advise, I will give it a go soon.
> 
> Just one question you might be able to answer. From the documentation
> it looks like LoadFile is used to add additional code. In my case, I
> need to override existing functionality. For example, if mod_php is
> already linked in with the MySQL client library, I want my own
> modified client library to be used instead, like LD_PRELOAD does for
> binaries. From the documentation it is not clear, but can I do this
> with LoadFie? Any hints/tips?

When mod_php is loaded into httpd, it's mysql dependencies/symbols will 
get resolved against the mysql client you have already LoadFile'd into 
httpd.

man dlopen and friends for more info.

> 
> Thanks alot!
> Andrej




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