>>(It's also very easy to get this wrong, I almost wrote `hostname[20]=0;` first time round.) Impossible to get wrong with a modern compiler that will warn you

>>(It's also very easy to get this wrong, I almost wrote `hostname[20]=0;` first time round.) Impossible to get wrong with a modern compiler that will warn you on that or LSP that will scream the moment you type ; and hit enter/esc.