I am not sure what you are trying to say, but the first source code snippet in your email in not valid C code. I don't know what you mean by "beginners" in the subject of your email, but I think that the documentation assumes basic knowledge of the C programming language. Cheers, Dan _______________________________________________ systemd-devel mailing list systemd-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/systemd-devel