teaclave-sgx-sdk-fs-example.rs

teaclave-sgx-sdk-fs-example.rs

use teaclave_sgx_sdk::fs::{RepoOpener, OpenOptions};

use std::io::prelude::*;
use std::io::{Seek, SeekFrom};
use std::path::Path;


// The most core parts of this module are `Repo` and `File`, which provides most
// API for file system operations and file data I/O.
//
//     `Repo` provides similar file system manipulation methods to `std::fs`
//     `File` provides similar file I/O methods to `std::fs::File`


fn main() {
    // Create and open a repository (in-memory FS), return the `teaclave_sgx_sdk::fs::Repo` type
    let mut repo = RepoOpener::new()
        .create(true)
        .open("mem://my_repo")
        .unwrap();

    // Create and open a file for writing, return the `teaclave_sgx_sdk::fs::File` type
    let mut file = OpenOptions::new()
        .create(true)
        .open(&mut repo, "/my_file.txt")
        .unwrap();

    // Use std::io::Write trait to write data into it
    file.write_all(b"Hello, world!").unwrap();

    // Read file content using std::io::Read trait
    let mut content = String::new();
    file.seek(SeekFrom::Start(0)).unwrap();
    file.read_to_string(&mut content).unwrap();
    assert_eq!(content, "Hello, world!");

    // Directory navigation can use Path and PathBuf.
    // The path separator should always be "/".

    let path = Path::new("/foo/bar");
    repo.create_dir_all(&path).unwrap();
    assert!(repo.is_dir(path.parent().unwrap()).is_ok());
}