Rust Essentials - Second Edition

Filesystem operations

Here is an example that shows some info for all files in the current directory:

// code from Chapter 11/code/read_files_in_dir.rs: 
use std::env; 
use std::fs; 
use std::error::Error; 
 
fn main() { 
    show_dir().unwrap(); 
} 
 
fn show_dir() -> Result<(), Box<Error>> { 
    let here = try!(env::current_dir()); 
    println!("Contents in: {}", here.display()); 
    for entry in try!(fs::read_dir(&here)) { 
        let path = try!(entry).path(); 
        let md = try!(fs::metadata(&path));        println!("  {} ({} bytes)", path.display(), md.len()); 
    } 
    Ok(()) 
} 

This prints out:

Contents in: F:\Rust\Rust book\The Rust Programming Language\Chapter 11 - Working with files\code F:\Rust\Rust book\The Rust Programming Language\Chapter 11 - Working with files\code\read_file.rs ...