Add stream boilerplate and find if users have opted into the finger protocol.

.gitignore

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+/target

Cargo.lock

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+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "singer"
+version = "0.1.0"

Cargo.toml

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+[package]
+name = "singer"
+version = "0.1.0"
+authors = ["Celeste <colean@colean.cc>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

src/main.rs

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+use std::io::{Write, BufReader, BufRead};
+use std::net::{TcpListener, TcpStream};
+use std::fs;
+use std::string::{String};
+
+fn path_exist(path: String) -> bool {
+
+	let file = fs::metadata(path);
+
+	match file {
+		Ok(_) => true,
+		Err(_) => false,
+	}
+
+}
+
+
+fn process(request: Vec<u8>) -> String { 
+	let mut input = String::from_utf8_lossy(&request).to_string();
+	let output;
+
+	input.pop();
+	input.pop();
+
+	println!("/home/{}/.yes__finger", input);
+
+	if path_exist(format!("/home/{}/.yes_finger", input)) {
+		// Todo: fingery stuff lmao
+		output = "User found!";
+	} else {
+		output = "The requested user does not exist.";
+	}
+
+	return output.to_string();
+
+}
+
+fn serve(mut stream: TcpStream) {
+	let mut request = Vec::new();
+	let mut reader = BufReader::new(&mut stream);
+	reader
+	    .read_until(b'\n', &mut request)
+	    .expect("Failed to read from stream!");
+	
+	let finger = process(request);
+	let response = format!("{}\n", finger);
+	
+	stream.write(response.as_bytes()).unwrap();
+	stream.flush().unwrap();
+
+}
+
+
+fn main() -> std::io::Result<()> {
+	let listen = TcpListener::bind("0.0.0.0:79")?;
+
+	for stream in listen.incoming() {
+		println!("Serving incoming stream.");
+		serve(stream?);
+	}
+	Ok(())
+}