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: mock_bin_src.rs
    path of file: ./repos/rustup/src/test/mock
    
    the code of the file until where you have to start completion: use std::env;
use std::env::consts::EXE_SUFFIX;
use std::io::{self, Write};
use std::path::{Path, PathBuf};
use std::process::Command;

fn main() {
    let mut args = env::args_os().skip(1);
    m
    
fn equivalent(a: &Path, b: &Path) -> bool {
    use std::fs::File;
    use std::mem::MaybeUninit;
    use std::os::windows::io::AsRawHandle;
    use std::os::windows::raw::HANDLE;

    #[repr(C)]
    struct FILETIME {
        dwLowDateTime: u32,
        dwHighDateTime: u32,
    }

    #[repr(C)]
    struct BY_HANDLE_FILE_INFORMATION {
        dwFileAttributes: u32,
        ftCreationTime: FILETIME,
        ftLastAccessTime: FILETIME,
        ftLastWriteTime: FILETIME,
        dwVolumeSerialNumber: u32,
        nFileSizeHigh: u32,
        nFileSizeLow: u32,
        nNumberOfLinks: u32,
        nFileIndexHigh: u32,
        nFileIndexLow: u32,
    }

    extern "system" {
        fn GetFileInformationByHandle(a: HANDLE, b: *mut BY_HANDLE_FILE_INFORMATION) -> i32;
    }

    let a = File::open(a).unwrap();
    let b = File::open(b).unwrap();
    let (ainfo, binfo) = unsafe {
        let mut ainfo = MaybeUninit::uninit();
        let mut binfo = MaybeUninit::uninit();
        if GetFileInformationByHandle(a.as_raw_handle(), ainfo.as_mut_ptr()) == 0 {
            return false;
        }
        if GetFileInformationByHandle(b.as_raw_handle(), binfo.as_mut_ptr()) == 0 {
            return false;
        }
        (ainfo.assume_init(), binfo.assume_init())
    };

    ainfo.dwVolumeSerialNumber == binfo.dwVolumeSerialNumber
        && ainfo.nFileIndexHigh == binfo.nFileIndexHigh
        && ainfo.nFileIndexLow == binfo.nFileIndexLow
}