You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: unix.rs
    path of file: ./repos/relative-path/relative-path-utils/src/root
    
    the code of the file until where you have to start completion: use std::ffi::{CString, OsString};
use std::fs::File;
use std::io;
use std::mem::MaybeUninit;
use std::os::fd::FromRawFd;
use std::os::fd::OwnedFd;
use std::os::fd::{AsFd, AsRawFd};
use std::path::{Path, MAIN_SEPARATOR};

#[cfg(not(any(
    all(target_os = "linux", not(target_env = "musl")),
    target_os = "emscripten",
    target_os = "l4re",
    target_os = "android",
    target_os = "hurd",
)))]
use libc::{fstat as fstat64, stat as stat64};
#[cfg(any(
    all(target_os = "linux", not(target_env = "musl")),
    target_os = "emscripten",
    target_os = "l4re",
    target_os = "hurd"
))]
use libc::{fstat64, stat64};

use relative_path::{Component, RelativePath};

#[derive(Debug)]
pub(super) struct Root {
    handle: OwnedFd,
}

impl Root {
    pub(super) fn new(path: &Path) -> io::Result<Self> {
        let file = std::fs::Ope
    
fn convert_to_c_string(input: &RelativePath) -> io::Result<CString> {
    let mut path = Vec::new();

    for c in input.components() {
        match c {
            Component::CurDir => {}
            Component::ParentDir => {
                if path.is_empty() {
                    return Err(io::Error::from_raw_os_error(libc::EINVAL));
                }

                let index = path
                    .iter()
                    .rposition(|&b| b == MAIN_SEPARATOR as u8)
                    .unwrap_or(0);
                path.truncate(index);
            }
            Component::Normal(normal) => {
                if normal.as_bytes().contains(&b'\0') {
                    return Err(io::Error::from_raw_os_error(libc::EINVAL));
                }

                if !path.is_empty() {
                    path.push(b'/');
                }

                path.extend_from_slice(normal.as_bytes());
            }
        }
    }

    if path.is_empty() {
        path.push(b'.');
    }

    path.push(0);

    // SAFETY: We've checked safety requirements of CString above.
    let owned = unsafe { CString::from_vec_with_nul_unchecked(path) };
    Ok(owned)
}