sshd on FBSD 8.0-RC2/3
Peter Beckman
beckman at angryox.com
Sun Dec 6 04:41:41 UTC 2009
On Sun, 6 Dec 2009, Dmitry Pryanishnikov wrote:
> 2009/12/3 Peter Beckman <beckman at angryox.com>:
>> On Thu, 3 Dec 2009, Dmitry Pryanishnikov wrote:
>>
>>> Well, ldd's output _itself_ depends on the current environment and
>>> thus can't insure that correct libraries will be used by the
>>> application. Compare:
>>
>> Well that's just confusing! So what's the default? If I have no
>> LD_LIBRARY_PATH set, lighttpd uses /usr/local/lib as I would
>> expect/hope/desire, but I have no understanding as to why. If I set
>> LD_LIBRARY_PATH to /usr/lib, it uses everything right EXCEPT
>> /usr/lib/libssl.so.6. What's the logic? How does one do it right?
>
> I haven't found definitive answer using RTFM. But luckily it's
> opensource, so RTFS gives the following search order for rtld-elf (as
> of RELENG_7):
>
> /usr/src/libexec/rtld-elf/rtld.c:
>
> /*
> * Find the library with the given name, and return its full pathname.
> * The returned string is dynamically allocated. Generates an error
> * message and returns NULL if the library cannot be found.
> *
> * If the second argument is non-NULL, then it refers to an already-
> * loaded shared object, whose library search path will be searched.
> *
> * The search order is:
> * LD_LIBRARY_PATH
> * rpath in the referencing file
> * ldconfig hints
> * /lib:/usr/lib
> */
>
> Looks like 'libssl.so.6 => /usr/local/lib/libssl.so.6' is set via
> rpath - it overrides standard hints path
> '/lib:/usr/lib:/usr/lib/compat:/usr/local/lib...' but still can be
> overridden by LD_LIBRARY_PATH.
You. Are. The. Man. I really appreciate you taking the time to dig that
up. I hope it will help someone else in the future also getting confused
with why one library is being used over another. Thanks!!!
Beckman
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