PHP4 custom extension problems on Redhat 4.4

[TiddlyPom]

I am trying to get a simple PHP wrapper extension for a custom two-phase-commit library (tpc) that is itself a wrapper for the Ingres II library.  (Just replicates all activities on identical Ingres II servers - don't ask I didn't write it!) 

 

The target environment is Redhat Linux Enterprise 4.4 (32/64 bit)

 

The biggest pain seems to be that my shared object library depends in turn on the Ingres shared object libraries.

 

I have managed to get a shared object extension built having followed the PHP4/5 examples and it works beautifully if I use the command line PHP e.g.

 

$ php test.php

 

produces the expected HTML result.  However if I try and use it under Apache/mod_php then it tries to serve the test.php file as a document rather than running the code.  Having hunted through the Apache error logs, I discovered that the "child process has died" - presumably a SEGFAULT in my code.

 

My code seem to fail as soon as I use any of my PHP extensions that call the Ingres libraries.

 

I have tried static linking of /opt/Ingres/IngresII/ingres/lib/libingres.a with my shared object.

I have put apache in the ingres group, turned SELinux off, added all the libraries to /etc/profile $PATH and $LD_LIBRARY_PATH, added environment variables to /etc/sysconfig/httpd and everything I can think of.

 

Help!

 

If there anything that I can do to give me a better idea of what is going wrong?

[TiddlyPom]

The shared object library that I am wrapping does not check whether the user is authorized on Ingres  but segfaults instead.  Both my own user and root were registered users in Ingres and (of course) worked fine.

 

When I altered the apache user to be able to login and mirrored the httpd environment variables, I got the same results.

 

On adding the apache user as a user to Ingres, it all worked fine.

 

I am adding some extra Ingres calls to make user that the user that httpd is running under is authorized in Ingres although this should be in the TPC library 

 

Sorry and thanks!