tar-wasi 0.4.38

A Rust implementation of a TAR file reader and writer. This library does not currently handle compression, but it is abstract over all I/O readers and writers. Additionally, great lengths are taken to ensure that the entire contents are never required to be entirely resident in memory all at once. This fork includes full support for running the library with WebAssembly via the target wasm32-wasi.
Documentation 
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//! An example of extracting a file in an archive.
//!
//! Takes a tarball on standard input, looks for an entry with a listed file
//! name as the first argument provided, and then prints the contents of that
//! file to stdout.

extern crate tar;

use std::env::args_os;
use std::io::{copy, stdin, stdout};
use std::path::Path;

use tar::Archive;

fn main() {
    let first_arg = args_os().skip(1).next().unwrap();
    let filename = Path::new(&first_arg);
    let mut ar = Archive::new(stdin());
    for file in ar.entries().unwrap() {
        let mut f = file.unwrap();
        if f.path().unwrap() == filename {
            copy(&mut f, &mut stdout()).unwrap();
        }
    }
}