debug: print lsof output

Author: joostjager

src/lib.rs

@@ -167,6 +167,7 @@ use rand::Rng;
 
 use std::default::Default;
 use std::net::ToSocketAddrs;
+use std::process::Command;
 use std::sync::{Arc, Mutex, RwLock};
 use std::time::{Duration, Instant, SystemTime, UNIX_EPOCH};
 
@@ -333,6 +334,16 @@ impl Node {
 							listeners.push(listener);
 						},
 						Err(e) => {
+							println!("Failed to bind to port {}", addr);
+
+							// On Linux/macOS
+							let output = Command::new("lsof")
+								.args(&["-i", &format!(":{}", &addr.port())])
+								.output()
+								.expect("failed to execute lsof");
+
+							println!("{}", String::from_utf8_lossy(&output.stdout));
+
 							log_error!(
 								logger,
 								"Failed to bind to {}: {} - is something else already listening?",