[SLUG] Silent failure as normal user

[Gavin Baker]

On 21 Sep 2006, at 12:00, Stephen O'Neill wrote:

> Hi all,
>
> I have a simple problem, but don't know of a simple solution:
>
> I have an extension for Firefox called "HTML Validator". It uses  
> some objects compiled in C which use shared libraries on my machine.
>
> When I run this extension as a normal user I get silent failures -  
> ie. nothing happens. When I run it as root it works.
>
> So, clearly I have permissions awry.
>
> I have a list of shared objects which the extension requires. But,  
> I don't want to start removing restrictions on files willy-nilly -  
> particularly as this approach could be exponential.
>
> If I was in windows I'd use "filemon" which shows every filesystem  
> access along with the outcome - success/access denied etc.
>
> What do I do if I'm in Linux?

<your distro remote installer thingy> strace

strace -o ffcrash.trace firefox

make it crash

look at the bottom of ffcrash.trace for open or stat calls or such,  
or grep it for /usr/...

Gav

p.s, strace, lsof and fuser are all invaluable tools, google will  
have loads on all three.