Re[2]: FastCGI and CGI Library -> Build FastCGI and Apache

Hello Bryan,

Thanks for the reply. No, I am not trying to build my app into
Apache. I'm trying to build mod_fastcgi into Apache. The reason
is that I'm using this strange library (.a) in my fcgi app and
I don't have source code for it. This library seem to hate .so.
If it's linked to a stand-alone single threaded app, it works
just fine. If it's linked to a .so file, it'll fail to initialize.
It seems to fail too if it's in the process space of a .so.
In my case, the process manager and the application seem to
be in the same process as mod_fastcgi.so and this could be
the problem. So, I'm trying to build mod_fastcgi into Apache
to remove the .so from the picture.

My application still outputs to the web - that's how I know
there was a problem: the output includes error return code
of the initialization function of the library.
However, nothing is put in the error log of Apache.

-- 
Best regards,
Jack

Saturday, April 23, 2005, 8:59:27 AM, you wrote:

BW> Jack wrote:
>> Here comes my question 2:
>> I have an application that uses a problematic library which has
>> problems with .so (on Apache2, Linux) It can not be linked to .so
>> projects. Its initialization always fails. It seems that I'm getting
>> the same problem when running it from fcgi app. The app runs ok from
>> command line. But if it's started by mod_fastcgi, it'll fail to
>> initialize. So, I'm thinking of building mod_fastcgi into Apache
>> source, just to avoid calling my app from a shared object mod_fastcgi.
>> However, I'm not sure if anyone has managed to do that, as mod_fastcgi
>> is typically used as a .so file. I'm not quite familiar with building
>> apache2 modules into apache, nor with mod_fastcgi. I searched the net
>> in the past few days and didn't find much useful info. So if anyone
>> has experience with this, I'd be happy to know. Instructions would
>> be even better.

BW> I don't think you correctly understand how mod_fastcgi works. It sounds
BW> like you are trying to link you application to apache.  Your fastcgi
BW> application is not part of the mod_fastcgi process.  Instead the 
BW> mod_fastcgi handler creates a process manager process.  The process
BW> manager shows up as another httpd process.  It takes care of running
BW> fastcgi applications, each as their own process.  Your cgi will listen
BW> for socket connections.

BW> Here is what my process tree currently looks like:

BW>       httpd-+-httpd-+-adredirect
BW>             |       +-2*[news]
BW>             +-179*[httpd]

BW> adredirect and news are both fastcgi applications.  They run as children
BW> of the process manager.  There are curently two copies of news running
BW> and 179 standard web server processes.

BW> Statically linking mod_fastcgi into the httpd process would not change
BW> the structure of this process tree.

BW> I don't know why your application is failing when called from the 
BW> process manager.  What does the apache error log say?

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