FS Structs

File system types ใน Rust สำหรับ working with files, directories, และ metadata

1. File

File represents an open file handle

Working with Files

use std::fs::File;
use std::io::{Read, Write, Seek, SeekFrom};

fn main() -> std::io::Result<()> {
    // Create new file (or truncate existing)
    let mut file = File::create("/tmp/test_rust.txt")?;
    file.write_all(b"Hello, World!")?;

    // Open for reading
    let mut file = File::open("/tmp/test_rust.txt")?;
    let mut contents = String::new();
    file.read_to_string(&mut contents)?;
    println!("Contents: {}", contents);

    // Open with custom options
    let file = std::fs::OpenOptions::new()
        .read(true)
        .write(true)
        .create(true)
        .open("/tmp/test_rust.txt")?;

    // Get file metadata
    let metadata = file.metadata()?;
    println!("Size: {} bytes", metadata.len());
    println!("Modified: {:?}", metadata.modified()?);
    println!("Is file: {}", metadata.is_file());

    // Sync to disk
    file.sync_all()?;   // Sync data and metadata
    file.sync_data()?;  // Sync data only (faster)

    // Clone file handle
    let _clone = file.try_clone()?;

    Ok(())
}