lix/nix-rust/src/lib.rs
2019-11-26 22:07:28 +01:00

49 lines
1.3 KiB
Rust

extern crate libc;
extern crate tar;
use std::fs;
use std::io;
use std::os::unix::fs::OpenOptionsExt;
use std::path::Path;
use tar::Archive;
#[no_mangle]
pub extern "C" fn unpack_tarfile(data: &[u8], dest_dir: &str) -> bool {
// FIXME: handle errors.
let dest_dir = Path::new(dest_dir);
let mut tar = Archive::new(data);
for file in tar.entries().unwrap() {
let mut file = file.unwrap();
let dest_file = dest_dir.join(file.header().path().unwrap());
fs::create_dir_all(dest_file.parent().unwrap()).unwrap();
match file.header().entry_type() {
tar::EntryType::Directory => {
fs::create_dir(dest_file).unwrap();
}
tar::EntryType::Regular => {
let mode = if file.header().mode().unwrap() & libc::S_IXUSR == 0 {
0o666
} else {
0o777
};
let mut f = fs::OpenOptions::new()
.create(true)
.write(true)
.mode(mode)
.open(dest_file)
.unwrap();
io::copy(&mut file, &mut f).unwrap();
}
t => panic!("Unsupported tar entry type '{:?}'.", t),
}
}
true
}