--quiet

src/main.rs

@@ -45,6 +45,7 @@ Options:
     --peer-timeout <peer_timeout>          Peer timeout in seconds [default: 300]
     --mac-timeout <mac_timeout>            Mac table entry timeout in seconds [default: 60]
     -v, --verbose                          Log verbosely
+    -q, --quiet                            Only print error messages
 ";
 
 #[derive(RustcDecodable, Debug)]
@@ -55,14 +56,18 @@ struct Args {
     flag_connect: Vec<String>,
     flag_peer_timeout: usize,
     flag_mac_timeout: usize,
-  flag_verbose: bool
+    flag_verbose: bool,
+    flag_quiet: bool
 }
 
 fn main() {
     let args: Args = Docopt::new(USAGE).and_then(|d| d.decode()).unwrap_or_else(|e| e.exit());
     log::set_logger(|max_log_level| {
+        assert!(!args.flag_verbose || !args.flag_quiet);
         if args.flag_verbose {
             max_log_level.set(log::LogLevelFilter::Debug);
+        } else if args.flag_quiet {
+            max_log_level.set(log::LogLevelFilter::Error);
         } else {
             max_log_level.set(log::LogLevelFilter::Info);
         }