Rust Programming By Example

Printing the current directory

First of all, we'll need a new attribute for our Client structure to specify what the current directory is: 

use std::path::PathBuf;

struct Client {
    cwd: PathBuf,
    writer: Writer,
}

The cwd attribute stands for current working directory. We also need to update the Client constructor accordingly:

impl Client {
    fn new(writer: Writer) -> Client {
        Client {
            cwd: PathBuf::from("/"),
            writer,
        }
    }
}

Now, we can add the handler for the PWD command:

#[async]
fn handle_cmd(mut self, cmd: Command) -> Result<Self> {
    println!("Received command: {:?}", cmd);
    match cmd {
        Command::Pwd => {
            let msg = format!("{}", self.cwd.to_str().unwrap_or(""));
            if !msg.is_empty() {
                let message = format!("\"/{}\" ", msg);
                self = await!(self