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: unistd.rs
    path of file: ./repos/nix/src
    
    the code of the file until where you have to start completion: //! Safe wrappers around functions found in libc "unistd.h" header

use crate::errno::Errno;

#[cfg
    
pub fn mkstemp<P: ?Sized + NixPath>(template: &P) -> Result<(RawFd, PathBuf)> {
    let mut path =
        template.with_nix_path(|path| path.to_bytes_with_nul().to_owned())?;
    let p = path.as_mut_ptr().cast();
    let fd = unsafe { libc::mkstemp(p) };
    let last = path.pop(); // drop the trailing nul
    debug_assert!(last == Some(b'\0'));
    let pathname = OsString::from_vec(path);
    Errno::result(fd)?;
    Ok((fd, PathBuf::from(pathname)))
}