efiboot 1.4.0

EFI boot manager variable editor written in Rust
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use std::{fs::File, io::Read, path::Path};

use uuid::Uuid;

use byteorder::{LittleEndian, ReadBytesExt};

use efivar::{
    efi::{VariableFlags, VariableName, VariableVendor},
    VarManager,
};

fn read_var_from_file(input_path: &Path) -> Result<(VariableFlags, Vec<u8>), std::io::Error> {
    let mut file = File::open(input_path)?;

    let flags = VariableFlags::from_bits(file.read_u32::<LittleEndian>()?).unwrap();
    let mut data = Vec::new();
    file.read_to_end(&mut data)?;

    Ok((flags, data))
}

pub fn run(
    mut manager: Box<dyn VarManager>,
    input_path: &Path,
    name: &str,
    namespace: Option<Uuid>,
) {
    let var = VariableName::new_with_vendor(
        name,
        namespace.map_or(VariableVendor::Efi, VariableVendor::Custom),
    );

    let (flags, data) = match read_var_from_file(input_path) {
        Ok(inner) => inner,
        Err(err) => {
            eprintln!(
                "Failed to read variable from file {}: {}",
                input_path.display(),
                err
            );
            return;
        }
    };

    match manager.write(&var, flags, &data) {
        Ok(()) => println!("Imported variable {} with success", var),
        Err(err) => eprintln!("Failed to write variable {}: {}", var, err),
    }
}