r/rust/comments/98japr/

main.rs

extern crate walkdir;

use std::fs::File;
use std::io::{self, Read};
use walkdir::WalkDir;

fn main() -> Result<(), io::Error> {
    let mut buffer = Vec::new();

    for entry in WalkDir::new("./").into_iter().filter_map(|e| e.ok()) {
        if !entry.file_type().is_file() {
            continue
        }

        let path = entry.path();
        let mut file = File::open(path)?;
        buffer.clear();
        file.read_to_end(&mut buffer)?;

        if let Some(idx) = buffer.iter().position(|&b| b == 0) {
            println!("{} bytes={} binary file", path.display(), idx);
        } else {
            println!("{} bytes={}", path.display(), buffer.len());
        }
    }
    Ok(())
}