Function shell_read_file

framework_lib/src/fw_uefi/fs.rs:36–73

(path: &str)

}

pub fn shell_read_file(path: &str) -> Option<Vec<u8>> {
    let shell = get_shell_protocol();
    let c_path = CString16::try_from(path).ok()?;

    unsafe {
        let mut handle: MaybeUninit<ShellFileHandle> = MaybeUninit::zeroed();
        let status = (shell.open_file_by_name)(
            c_path.as_ptr().cast(),
            handle.as_mut_ptr(),
            FileMode::READ.bits(),
        );
        if status.is_error() {
            return None;
        }

        let file_handle = handle.assume_init();

        let mut file_size: u64 = 0;
        let status = (shell.get_file_size)(file_handle, &mut file_size);
        if status.is_error() {
            let _ = (shell.close_file)(file_handle);
            return None;
        }

        let mut buffer: Vec<u8> = vec![0; file_size as usize];
        let mut read_size = file_size as usize;
        let status = (shell.read_file)(file_handle, &mut read_size, buffer.as_mut_ptr().cast());

        let _ = (shell.close_file)(file_handle);

        if status.is_error() {
            return None;
        }

        buffer.truncate(read_size);
        Some(buffer)
    }
}

pub fn shell_write_file(path: &str, data: &[u8]) -> Result {
    let shell = get_shell_protocol();