Strange kpsewhich behaviour

Hi, 

I'm using a selfcompiled teTeX 3.0.
I have a problem, that kpsewhich seems not to work inside of kdvi. I made a 
testcase which shows the problem. When I issue

kpsewhich --format=dvips config ps2pk.map

in the command line, I get as a result:

/usr/local/teTeX/share/texmf-var/fonts/map/dvips/updmap/ps2pk.map

But when I compile and run the following programm:

#include <unistd.h>

int main()
{
        execlp(  "kpsewhich", "kpsewhich", "--format=dvips config", 
"ps2pk.map", 0);
        return 0;
}

I get nothing at all. You can see differences by using strace on the 
testprogramm and on kpsewhich itself.


I'm sure that the programm should work because I tried both cases on an SuSe 
9.1 default installation of teTeX and both times I got:

/var/lib/texmf/dvips/config/ps2pk.map

Does anyone know why the newer kpsewhich does not return anything when run  
from another program?

Yours sincerely,
Christoph Bartoschek