[oss-devel] A useful debugging source

[Yair K.]

Hi,

  The attached source, when compiled to a library and LD_PRELOADed,  will 
write which ioctls an app sends to OSS's "/dev/dsp" to stderr. It's useful 
for debugging, especially when an application isn't open source. However, 
it's hackish and may only work only on Linux. To build and run:

 1) cc -fPIC -shared -Wl,-soname,libwrap_ioctl.so.1 -I/usr/lib/oss/include
    -I/usr/include -o libwrap_ioctl.so.1.0 -ldl ioctlw.c
 2) LD_PRELOAD=libwrap_ioctl.so.1.0 (app).

[1] With thanks to 
http://scaryreasoner.wordpress.com/2007/11/17/using-ld_preload-libraries-and-glibc-backtrace-function-for-debugging/
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