Loading the OSS modules on the XO

[Jim Gettys]

I thought there was a library/shim/kernel option that allowed us to
emulate OSS on ALSA?

In any case, anything not using ALSA at this date really should get
updated to ALSA....
                         - Jim



On Wed, 2008-08-13 at 10:43 -0400, pgf at laptop.org wrote:
> shivaprasad wrote:
>  > Its OK if I need to have root permissions only once right? I can change the
> 
> yes.
> 
>  > /etc/modules/ once during installation of the activity and need not load the
>  > module every time I run the activity. I am new programming on Linux and
>  > wasnt sure what to change to make the XO load the oss module on startup. So
>  > my plan is if I  know how to make the XO load the  oss modules  I can do
>  > this in a script and run the script during installation of the activity so
>  > that when I launch the activity I would not need root permission.Could you
>  > please tell me how to change /etc/modules to load oss modules on startup?
> 
> the file /etc/modules that erik mentioned isn't used on the XO, but
> there's a similar mechanism in place.
> 
> create a new file /etc/sysconfig/modules, with a name that ends
> in ".modules", like "oss.modules".  that file should be an executable
> shell script which will load the modules you want.  see the existing
> "olpc-1.modules" file in that directory as an example, but probably
> all you need is a single "modprobe snd-pcm-oss" command.
> 
> this should cause your module to be installed when the XO boots.
> 
> paul
> 
>  > 
>  > Thanks
>  > Shivaprasad
>  > 
>  > On Wed, Aug 13, 2008 at 6:54 PM, Erik Garrison <erik at laptop.org> wrote:
>  > 
>  > > On Wed, Aug 13, 2008 at 06:16:58PM +0530, shivaprasad javali wrote:
>  > > > Hi,
>  > > >
>  > > >    I am porting a application to the XO. It uses the OSS sound Api's to
>  > > > render sound. I found that the oss modules are not loaded on the xo by
>  > > > default. I was able to load the oss modules by running modprobe
>  > > snd-pcm-oss
>  > > > which created the /dev/dsp and other device files required by the oss
>  > > > modules and was able to run my application on the XO. But the problem is
>  > > > every time I reboot the XO I will have to run the commands and load the
>  > > oss
>  > > > modules.
>  > > >
>  > > >    Is there any way I can tell the XO to always load the oss modules?
>  > > Even
>  > > > if I have a script to run the commands on launching the application these
>  > > > commands would require super user privileges which I wont have when I
>  > > launch
>  > > > the application from the activity bar. Any Ideas?
>  > >
>  > > Without root access, your activity will have difficulty modifying
>  > > /etc/modules to enable autoloading the snd-pcm-oss module at boot.  I am
>  > > unsure if there is any way around this issue unless the deployment scope
>  > > for your activity is a set of machines on which you have root access.
>  > >
>  > > Erik
>  > >
>  > part 2     text/plain                 129
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> =---------------------
>  paul fox, pgf at laptop.org
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-- 
Jim Gettys <jg at laptop.org>
One Laptop Per Child