aoss: problems with using functions in dlfcn.h

aoss: problems with using functions in dlfcn.h

[James Courtier-Dutton]

I have an application (xine) that opens oss output from a plugin.
This plugin is loaded into xine using dlopen(), dlsym() and friends.
When, during runtime, dlsym() resolves the open() function, it bypasses 
aoss, and links directly to open() instead of linking to the aoss's 
version of open().

Is there any way to fix this problem with dlopen and friends.

Although we don't actually need aoss to work with xine, because xine has 
good native alsa support, it just highlights a possible problem that 
other apps might have.

James


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Re: aoss: problems with using functions in dlfcn.h

[Jaroslav Kysela]

On Fri, 11 Jun 2004, James Courtier-Dutton wrote:

> I have an application (xine) that opens oss output from a plugin.
> This plugin is loaded into xine using dlopen(), dlsym() and friends.
> When, during runtime, dlsym() resolves the open() function, it bypasses 
> aoss, and links directly to open() instead of linking to the aoss's 
> version of open().
> 
> Is there any way to fix this problem with dlopen and friends.
> 
> Although we don't actually need aoss to work with xine, because xine has 
> good native alsa support, it just highlights a possible problem that 
> other apps might have.

I don't know a working solution, because LD_PRELOAD works only for
the main code not dlopen one.

Perhaps, it's time to persuade all developers using OSS API to use my OSS 
redirector from the alsa-oss package. See alsa-oss/oss-redir/README .

						Jaroslav

-----
Jaroslav Kysela <perex@suse.cz>
Linux Kernel Sound Maintainer
ALSA Project, SuSE Labs


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