detecting if compiled or loaded modules

detecting if compiled or loaded modules

[24]

Greets,

     Is there a way to determine if one of the Netfilter Configs is loaded as module or built-in in the
kernel? For example FTP protocol support. Once the system boots or the module is loaded shouldnt it 
create a file somewhere in /proc once the module is up or once the system boots. I'm trying to create
a customized firewall program if it didnt detect the FTP protocol support it will load the module 
or what. Need help...

Re: detecting if compiled or loaded modules

[Andrea Rossato]

there are probably better and more efficient ways, but:

/proc/modules gives you the list of loaded modules

you can check if a module was built into the kernel by checking its 
functions in /boot/System.map
for istance:
cat /boot/System.map | grep hisax to check if hisax support was built 
into the kernel (that will give you the list of related functions).

in /lib/modules/kernelversion/modules.dep you'll find a list of compiled 
modules with their dependencies.

hope that this can be useful
andrea

24 wrote:
> Greets,
> 
>      Is there a way to determine if one of the Netfilter Configs is loaded as module or built-in in the
> kernel? For example FTP protocol support. Once the system boots or the module is loaded shouldnt it 
> create a file somewhere in /proc once the module is up or once the system boots. I'm trying to create
> a customized firewall program if it didnt detect the FTP protocol support it will load the module 
> or what. Need help...
> 

Re: detecting if compiled or loaded modules

[24]

Greets,
  
     Useful indeed :) thanks! i just thought once the module is up or it's built in the kernel a file in /proc/sys/net/ipv4/* would appear but I think your suggestion would work thanks again

On Sun, 15 Dec 2002 09:59:39 +0100
Andrea Rossato <mailing_list@istitutocolli.org> wrote:

> there are probably better and more efficient ways, but:
> 
> /proc/modules gives you the list of loaded modules
> 
> you can check if a module was built into the kernel by checking its 
> functions in /boot/System.map
> for istance:
> cat /boot/System.map | grep hisax to check if hisax support was built 
> into the kernel (that will give you the list of related functions).
> 
> in /lib/modules/kernelversion/modules.dep you'll find a list of compiled 
> modules with their dependencies.
> 
> hope that this can be useful
> andrea

Re: detecting if compiled or loaded modules

[Patrick Schaaf]

>Is there a way to determine if one of the Netfilter Configs is loaded
>as module or built-in in the kernel?

Have a look at /proc/ksyms. But that's not portable, probably not even
to the future 2.6 kernel.

There is no other way. Normal, sane people don't need a GUI to load
their modules. Their init scripts do it for them already. So, there is
no pressing need, especially for an iptables specific solution.

The best you can probably do, is just try to load the module, and ignore
the error case which says "already loaded". Talk to the insmod maintainers
if you have trouble with detecting that error case properly.

best regards
  Patrick

-- 
Who runs GUI programs as root, anyway?