Great Circle Associates Firewalls
(November 1995)
 

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Subject: Re: Changing shared libraries and how is ld.so finding real libraries?
From: Michel Lavondes <lavondes @ tidtest . total . fr>
Date: Fri, 10 Nov 1995 19:52:27 +0000
To: Tim Frost <Tim . Frost @ nz . eds . com>
Cc: "Frank O'Dwyer" <fod @ fws . ilo . dec . com>, Scott Barman <scott @ disclosure . com>, firewalls @ greatcircle . com
In-reply-to: Your message of "Fri, 10 Nov 1995 12:10:57 +1300." <Pine . SV4 . 3 . 91 . 951110113053 . 4384C-100000 @ oscar>

In message <Pine .
 SV4 .
 3 .
 91 .
 951110113053 .
 4384C-100000 @
 oscar>, Tim Frost writes:
> 
> [snip]
> 
> SVR4, Linux and Solaris (at least - I don't have a BSD-based platform to
> check) all allow you to determine what libraries are loaded, by using the
> command ldd.

So does Sunos 4.1.4

> 
> [snip]
> 
> The man page for ldd points out the one caveat: ldd does not identify 
> libraries accessed using the dlopen() function.
> 

Doesn't say so on Sunos 4.1.4. OTOH, ldd /usr/bin/login mumbles
something about /usr/lib/libdl.so.1.0. Don't know what's in there, though.

> 
> [snip]
> 
> If you have ldd, you can detect this problem with the -r option to ldd, 
> which checks references to data and functions.
> 

Not supported under Sunos 4.1.4 (actually, it has no options at all)

> 
> [snip]
> 

Just my <your favorite currency goes here> 0.02

Michel Lavondes (lavondes @
 tidtest .
 total .
 fr) #include <disclaimer.h>
============================================================
= When Privacy Is Outlawed, Only Outlaws Will Have Privacy =
=    I Support the Phil Zimmermann Legal Defense Fund!     =
= email: zldf @
 clark .
 net    http://www.netresponse.com/zldf =
============================================================
(with thanks to those who lead me into it :-))


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