### Complete Interactive Terminal Example with Rust

Source: https://context7.com/roboplc/virtual-terminal/llms.txt

This comprehensive example showcases a full interactive terminal session using the `virtual_terminal` crate. It includes stdin forwarding, stdout/stderr display, and proper signal handling for a `bash` process. Dependencies include `virtual_terminal`, `tokio`, and `std::time::Duration`.

```rust
use std::time::Duration;
use virtual_terminal::{Command, Input, Output};
use tokio::io::{AsyncReadExt, AsyncWriteExt};

#[tokio::main]
async fn main() {
    let cmd = Command::new("bash")
        .terminal_size((80, 24))
        .shutdown_timeout(Duration::from_secs(1))
        .env("PS1", "virtual$ ");

    let in_tx = cmd.in_tx();
    let out_rx = cmd.out_rx();

    // Spawn stdin reader
    let stdin_tx = in_tx.clone();
    tokio::spawn(async move {
        let mut stdin = tokio::io::stdin();
        let mut buf = [0u8; 1024];
        loop {
            match stdin.read(&mut buf).await {
                Ok(0) => break,
                Ok(n) => {
                    if stdin_tx.send(Input::Data(buf[..n].to_vec())).await.is_err() {
                        break;
                    }
                }
                Err(_) => break,
            }
        }
    });

    // Run the command
    tokio::spawn(cmd.run());

    // Process output
    while let Ok(output) = out_rx.recv().await {
        match output {
            Output::Pid(pid) => eprintln!("[PID: {}]", pid),
            Output::Stdout(data) => {
                tokio::io::stdout().write_all(&data).await.ok();
                tokio::io::stdout().flush().await.ok();
            }
            Output::Terminated(code) => {
                eprintln!("[Exited: {:?}]", code);
                break;
            }
            Output::Error(e) => {
                eprintln!("[Error: {}]", e);
                break;
            }
        }
    }
}
```

--------------------------------

### Handle Terminal Resize Events with Rust

Source: https://context7.com/roboplc/virtual-terminal/llms.txt

This example demonstrates how to handle terminal resize events (SIGWINCH) using the `virtual_terminal` crate and `tokio`. It dynamically updates the virtual terminal dimensions when the parent terminal size changes, ensuring proper display for applications like `htop`. Dependencies include `virtual_terminal`, `tokio`, and `terminal_size`.

```rust
use virtual_terminal::{Command, Input, Output};
use tokio::signal::unix::{signal, SignalKind};

#[tokio::main]
async fn main() {
    let (width, height) = terminal_size::terminal_size().unwrap();
    let cmd = Command::new("htop")
        .terminal_size((width.0.into(), height.0.into()));

    let in_tx = cmd.in_tx();
    let out_rx = cmd.out_rx();

    // Spawn resize handler
    let resize_tx = in_tx.clone();
    tokio::spawn(async move {
        let mut sigwinch = signal(SignalKind::window_change()).unwrap();
        loop {
            sigwinch.recv().await.unwrap();
            if let Some((w, h)) = terminal_size::terminal_size() {
                resize_tx
                    .send(Input::Resize((w.0.into(), h.0.into())))
                    .await
                    .ok();
            }
        }
    });

    tokio::spawn(cmd.run());

    while let Ok(msg) = out_rx.recv().await {
        match msg {
            Output::Stdout(v) => {
                tokio::io::stdout().write_all(&v).await.unwrap();
            }
            Output::Terminated(code) => {
                std::process::exit(code.unwrap_or(-1));
            }
            _ => {}
        }
    }
}
```

--------------------------------

### Create New Virtual Terminal Command (Rust)

Source: https://context7.com/roboplc/virtual-terminal/llms.txt

Constructs a new `Command` instance to spawn a process within a virtual terminal. Supports builder pattern for configuring terminal size, type, arguments, environment variables, current directory, and shutdown timeout. Defaults to 80x24 terminal size and 'screen-256color' type.

```rust
use virtual_terminal::Command;

// Create a basic command
let cmd = Command::new("bash");

// Create command with full configuration
let cmd = Command::new("htop")
    .terminal_size((120, 40))
    .terminal_id("xterm-256color")
    .args(["--delay=1"])
    .env("LANG", "en_US.UTF-8")
    .current_dir("/home/user")
    .shutdown_timeout(std::time::Duration::from_secs(2));
```

--------------------------------

### Execute Command in Virtual Terminal (Rust)

Source: https://context7.com/roboplc/virtual-terminal/llms.txt

Asynchronously spawns a configured process in a virtual terminal and initiates I/O processing. This method should be run in a separate tokio task. It manages PTY creation, process spawning, and communication until the process exits, providing output via a receiver channel.

```rust
use virtual_terminal::Command;

#[tokio::main]
async fn main() {
    let cmd = Command::new("bash")
        .terminal_size((80, 24));

    // Get channels before spawning
    let out_rx = cmd.out_rx();
    let in_tx = cmd.in_tx();

    // Spawn the command in a separate task
    tokio::spawn(cmd.run());

    // Process output until termination
    while let Ok(msg) = out_rx.recv().await {
        match msg {
            virtual_terminal::Output::Pid(pid) => println!("Process started with PID: {}", pid),
            virtual_terminal::Output::Stdout(data) => print!("{}", String::from_utf8_lossy(&data)),
            virtual_terminal::Output::Terminated(code) => {
                println!("Process exited with code: {:?}", code);
                break;
            }
            virtual_terminal::Output::Error(e) => {
                eprintln!("Error: {}", e);
                break;
            }
        }
    }
}
```

--------------------------------

### Receive Process Output and Status with Rust

Source: https://context7.com/roboplc/virtual-terminal/llms.txt

This snippet shows how to use the Output enum from the virtual_terminal crate to process messages from a spawned process. It handles process ID, stdout/stderr data, error messages, and termination status. Dependencies include `virtual_terminal` and `tokio`.

```rust
use virtual_terminal::{Command, Output};
use tokio::io::AsyncWriteExt;

#[tokio::main]
async fn main() {
    let cmd = Command::new("ls")
        .args(["-la"])
        .terminal_size((80, 24));

    let out_rx = cmd.out_rx();
    tokio::spawn(cmd.run());

    while let Ok(output) = out_rx.recv().await {
        match output {
            Output::Pid(pid) => {
                println!("Started process with PID: {}", pid);
            }
            Output::Stdout(bytes) => {
                // Write raw terminal output to stdout
                tokio::io::stdout().write_all(&bytes).await.unwrap();
                tokio::io::stdout().flush().await.unwrap();
            }
            Output::Error(error_msg) => {
                eprintln!("Terminal error: {}", error_msg);
                break;
            }
            Output::Terminated(exit_code) => {
                match exit_code {
                    Some(code) => println!("\nProcess exited with code: {}", code),
                    None => println!("\nProcess terminated without exit code"),
                }
                break;
            }
        }
    }
}
```

--------------------------------

### Send Input and Control Commands to Process (Rust)

Source: https://context7.com/roboplc/virtual-terminal/llms.txt

Utilizes the `Input` enum to send data and control signals to a spawned process. Supports sending raw bytes to stdin, resizing the terminal dimensions, and gracefully terminating the process. Communication is done asynchronously via an input sender channel.

```rust
use virtual_terminal::{Command, Input};

#[tokio::main]
async fn main() {
    let cmd = Command::new("bash").terminal_size((80, 24));
    let in_tx = cmd.in_tx();
    let out_rx = cmd.out_rx();

    tokio::spawn(cmd.run());

    // Wait for process to start
    if let Ok(virtual_terminal::Output::Pid(_)) = out_rx.recv().await {
        // Send data to stdin (execute a command)
        in_tx.send(Input::Data(b"echo 'Hello World'\n".to_vec())).await.ok();

        // Resize terminal to new dimensions
        in_tx.send(Input::Resize((120, 40))).await.ok();

        // Terminate the process gracefully
        in_tx.send(Input::Terminate).await.ok();
    }
}
```

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