.map_err(|err| OSErrorBuilder::with_filename(&err, path, vm))?;

#[cfg(windows)]

{

// win32_wchdir()

// On Windows, set the per-drive CWD environment variable (=X:)

// This is required for GetFullPathNameW to work correctly with drive-relative paths

use std::os::windows::ffi::OsStrExt;

use windows_sys::Win32::System::Environment::SetEnvironmentVariableW;

if let Ok(cwd) = env::current_dir() {

let cwd_str = cwd.as_os_str();

let mut cwd_wide: Vec<u16> = cwd_str.encode_wide().collect();

// Check for UNC-like paths (\\server\share or //server/share)

// wcsncmp(new_path, L"\\\\", 2) == 0 || wcsncmp(new_path, L"//", 2) == 0

let is_unc_like_path = cwd_wide.len() >= 2

&& ((cwd_wide[0] == b'\\' as u16 && cwd_wide[1] == b'\\' as u16)

|| (cwd_wide[0] == b'/' as u16 && cwd_wide[1] == b'/' as u16));

if !is_unc_like_path {

// Create env var name "=X:" where X is the drive letter

let env_name: [u16; 4] = [b'=' as u16, cwd_wide[0], b':' as u16, 0];

cwd_wide.push(0); // null-terminate the path

unsafe {

SetEnvironmentVariableW(env_name.as_ptr(), cwd_wide.as_ptr());

}

}

}

}

Ok(())