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When running serve check if port is available #2632

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When running serve check if port is available #2632

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6 changes: 6 additions & 0 deletions src/cmd/serve.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -69,6 +69,12 @@ pub fn execute(args: &ArgMatches) -> Result<()> {
update_config(&mut book);
book.build()?;

let listener = std::net::TcpListener::bind(&address);
if listener.is_err() {
return Err(anyhow::anyhow!("Unable to bind to address: {} (It is either a protected port or it is used already. Try to another port or use --port 0 to select a random port. ", address).into());
}
drop(listener);

let sockaddr: SocketAddr = address
.to_socket_addrs()?
.next()
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