[solana-install-init] Optimize error message for Windows user permission installation

[WGB5445]

Problem

When users attempt to execute this command without administrator privileges, it results in error code 1314.

Most users find it challenging to promptly recognize that this issue stems from permission limitations.

Summary of Changes

Therefore, I propose two possible solutions:

1. Implement a permission checking function utilizing winapi.

unsafe {
        let mut handle: HANDLE = ptr::null_mut();
        if OpenProcessToken(GetCurrentProcess(), TOKEN_QUERY, &mut handle) == 0 {
            return Err(format!("{}", Error::last_os_error()));
        }

        let mut elevation = TOKEN_ELEVATION::default();
        let size = std::mem::size_of::<TOKEN_ELEVATION>() as u32;
        let mut ret_size = size;
        let result = GetTokenInformation(
            handle,
            TokenElevation,
            &mut elevation as *mut _ as *mut _,
            size,
            &mut ret_size,
        );
        if result == 0 {
            return Err(format!("{}", Error::last_os_error()));
        }

        if elevation.TokenIsElevated != 0 {
            Ok(())
        } else {
            Err(
                "You need to run this command with administrator privileges."
                    .parse()
                    .unwrap(),
            )
        }
    }

2. Check for error code 1314 in the error message.

symlink_dir(
        release_dir.join("solana-release"),
        config.active_release_dir(),
    )
    .map_err(|err| match err.raw_os_error() {
        Some(1314) => "You need to run this command with administrator privileges.".to_string(),
        _ => format!(
            "Unable to symlink {:?} to {:?}: {}",
            release_dir,
            config.active_release_dir(),
            err
        ),
    })?;

Your valuable feedback on these proposed solutions would be greatly appreciated.

[WGB5445]

I'd appreciate some assistance, such as which approach is better, or both are equally good.

Thank you very much.

[joncinque]

Thanks for your contribution! I like the approach of catching the error. I've added a little suggestion to help document the behavior a bit more

[joncinque]

Just two more little things -- this is very close!

[joncinque]

You can do match with a conditional avoid the copying of the fallback error, ie:

Suggested change

	#[cfg(windows)]
	Some(os_err) => if os_err == winapi::shared::winerror::ERROR_PRIVILEGE_NOT_HELD {
	"You need to run this command with administrator privileges.".to_string()
	} else {
	format!(
	"Unable to symlink {:?} to {:?}: {}",
	release_dir,
	config.active_release_dir(),
	err
	)
	},
	#[cfg(windows)]
	Some(os_err) if os_err == winapi::shared::winerror::ERROR_PRIVILEGE_NOT_HELD => {
	"You need to run this command with administrator privileges.".to_string()
	},

More info at https://doc.rust-lang.org/reference/expressions/match-expr.html#match-guards

[WGB5445]

Thank you very much, this is so important.

In fact, I started developing with windows, but I found that these codes could not be compiled correctly on windows because some build.rs would report errors.

[WGB5445]

[joncinque]

Thanks for your contribution!