lrzsz2 0.3.0

ZMODEM file transfer utilities
Documentation 
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// SPDX-License-Identifier: MIT OR Apache-2.0
// Copyright (c) 2017-2020 Alexey Arbuzov
// Copyright (c) 2023-2025 Jarkko Sakkinen

extern crate zmodem2;

use anyhow::{bail, Context};
use argh::FromArgs;
use indicatif::{ProgressBar, ProgressStyle};
use lrzsz2::ReadWrite;
use std::fs::{File, OpenOptions};
use std::io::Write;
use std::path::{Component, Path, PathBuf};

#[derive(FromArgs, Debug)]
/// Receive files using the ZMODEM protocol.
struct Arguments {
    /// device file [default: /dev/ttyS0]
    #[argh(option, short = 'p', default = "String::from(\"/dev/ttyS0\")")]
    port: String,
    /// download directory
    #[argh(positional)]
    path: String,
}

fn main() -> anyhow::Result<()> {
    let args: Arguments = argh::from_env();

    let mut port: Box<dyn ReadWrite> = Box::new(
        OpenOptions::new()
            .read(true)
            .write(true)
            .open(&args.port)
            .with_context(|| format!("'{}'", args.port))?,
    );

    let mut state = zmodem2::State::new();
    let mut buf = vec![];
    while state.stage() == zmodem2::Stage::SessionBegin {
        if zmodem2::receive(&mut port, &mut buf, &mut state).is_err() {
            bail!("connection lost");
        }
    }
    let received_filename = Path::new(state.file_name())
        .components()
        .next_back()
        .and_then(|c| match c {
            Component::Normal(name) => Some(name),
            _ => None,
        })
        .with_context(|| format!("malformed filename: '{}'", state.file_name()))?;

    let dest_dir = PathBuf::from(args.path);
    if !dest_dir.is_dir() {
        bail!("'{}' is not a directory", dest_dir.display());
    }
    let path = dest_dir.join(received_filename);

    let pb = ProgressBar::new(state.file_size() as u64);
    pb.set_style(
        ProgressStyle::default_bar()
            .template(
                "{msg}\n{spinner} [{elapsed_precise}] [{bar:40}] {bytes}/{total_bytes} ({eta})",
            )?
            .progress_chars("=>-"),
    );
    pb.set_message(format!("Receiving {}", path.display()));
    let mut file =
        File::create(&path).with_context(|| format!("could not create '{}'", path.display()))?;
    file.write_all(&buf)?;
    while state.stage() != zmodem2::Stage::SessionEnd {
        if let Err(e) = zmodem2::receive(&mut port, &mut file, &mut state) {
            pb.finish_with_message("Aborted");
            bail!("ZMODEM error: {:#}", e);
        }
        pb.set_position(state.count() as u64);
    }
    pb.finish_with_message("Done");
    Ok(())
}