modules detection

modules detection

[Yann E. MORIN]

Hi!

I need to know (in a script shell for instance) if a running kernel
is compiled with/without module support. I don't have access to the
source tree when detecting (though I have it mounted sometime later).

Reading the source (fs/proc/proc_misc.c), I understand that the file
/proc/modules exists only when modules are supported by the running
kernel. Is that true? If so, can I assume that the following script
is correct?

-=-=-=-
#!/bin/bash
[ -e /proc/modules ] && echo Modules supported by running kernel. \
                     || echo Modules not supported by running kernel.
-=-=-=-

If not, how may I detect module support?

(Yes, I could build two kernels supporting modules vs not supporting
modules, but my machine is quite slow : 2h per compilation :-( ).

Thanks for any reply.

Regards,
Yann E. MORIN.

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Re: modules detection

[Richard B. Johnson]

On Thu, 17 Jan 2002, Yann E. MORIN wrote:

> Hi!
> 
> I need to know (in a script shell for instance) if a running kernel
> is compiled with/without module support. I don't have access to the
> source tree when detecting (though I have it mounted sometime later).
> 
> Reading the source (fs/proc/proc_misc.c), I understand that the file
> /proc/modules exists only when modules are supported by the running
> kernel. Is that true? If so, can I assume that the following script
> is correct?
> 
> -=-=-=-
> #!/bin/bash
> [ -e /proc/modules ] && echo Modules supported by running kernel. \
>                      || echo Modules not supported by running kernel.
> -=-=-=-
> 
> If not, how may I detect module support?
> 
> (Yes, I could build two kernels supporting modules vs not supporting
> modules, but my machine is quite slow : 2h per compilation :-( ).
> 
> Thanks for any reply.
> 
> Regards,
> Yann E. MORIN.
> 

You could also use `lsmod`. It uses query_module() which will return
some error code if modules are not supported.

if  lsmod >/dev/null ; then
    echo "Modules are supported"
else
   echo "Modules not supported"
fi

Cheers,
Dick Johnson

Penguin : Linux version 2.4.1 on an i686 machine (797.90 BogoMips).

    I was going to compile a list of innovations that could be
    attributed to Microsoft. Once I realized that Ctrl-Alt-Del
    was handled in the BIOS, I found that there aren't any.