Program permission during dynamic linking

Hello,
If a program P with security of user "goo" uses a library (.so file)
during running, which has permission "root", what is the privilege of
program P?
Is it goo throughout, root throughout, or goo when its in its own code,
and root when the lib gets invoked?


Thanks.

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On 26 Dec 2005 01:43:11 -0800,
binary-nomad@hotmail.com <binary-nomad@hotmail.com> wrote:
> Hello,
> If a program P with security of user "goo" uses a library (.so file)
> during running, which has permission "root", what is the privilege of
> program P?
> Is it goo throughout, root throughout, or goo when its in its own code,
> and root when the lib gets invoked?
>
>
> Thanks.
>


Assuming no funny business with SUID or SetGUID, programme P runs with
permissions of user goo, the permissions of the library, are not
relevent. The library is just a file that gets loaded by ld.

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--
Jim Richardson http://www.eskimo.com/~warlock
Don't get mad, get Linux