Jens, I ran your program ("updated test") on a Debian 7.0 system with libc6
et al
upgraded to 2.17-7.

Output:

    y.c:44: error: r=-2 Name or service not known

Output after replacing "karme.de." with "www.google.com": none; the program
completed successfully.

Output after doing "iptables -I OUTPUT -p udp -m udp --dport 53 -j DROP":

    y.c:29: error: r=-5 No address associated with hostname

Comments?
-- 
Thomas

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