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Filters and DO

Hey List...

We have a "custompdftops" filter in /usr/libexec/cups/filter and a corresponding "custom.convs" file in /etc/cups to make it run instead of cgpdftops. So far so good - this works like a charm.

However, our filter needs to talk to a background application, so I started implementing that using Distributed Objects. The background app vends a named object, the filter attempts to connect to the named object. Turns out that the following code in the filter always returns nil:
[NSConnection rootProxyForConnectionWithRegisteredName:@"some.registered.name" host:nil];

So to isolate the problem, I tried to run the filter from the command line. Worked fine - it connected without any problems and a valid proxy was returned. I tried from the command line using "sudo -u daemon custompdftops [...]" (filters normally execute as daemon). Worked fine again. I checked the command line environment and edited my filter to set exactly the same environment before trying to obtain the proxy. Still no luck.

My question, then: Is there something about the print system that prevents Distributed Objects from working properly in filters? If the environment is the same, what else could be different? Any suggestions or pointers?

Thanks!
Tobias Peciva
Pharos Systems
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