[syslog-ng] checking configuration file syntax

Hello all! I'm trying to automate configuration file syntax checking and can't figure out how I can do it. According to manual -s option should perform syntax checking. I'm trying following: syslog-ng -s -f file-to-check It always exits with zero status and never outputs anything, regardless of correct configuration file or it contains errors. Is there something I missed? I tested it on 2.0.9 and on premium edition 2.1.11a. -- Best regards, Pavel Shaydo