LD_PRELOAD=<driver> versus /etc/modules ... <module>; was "using exec in a script"

[peasthope@shaw.ca]

From:	Liam O'Toole <liam.p.otoole@gmail.com>
Date:	Thu, 10 Mar 2011 20:03:52 +0000 (UTC)
> 	#!/bin/sh
> 	export LD_PRELOAD=/usr/lib/libv4l/v4l1compat.so
> 	exec /usr/bin/skype

Works perfectly.  Thanks.

For sake of interest, another approach which failed was to list 
v4l1compat in /etc/modules and invoke /usr/bin/skype in ~/.config/auto*/skype* .

peter@dalton:~$ egrep -v '(^ *#)|(^ *$)' /etc/modules
loop
v4l1compat

Why does this fail while use of LD_PRELOAD as above works?  

Regards,             ... Peter E.

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