//go:build !unix

package activator

import (
	"os"
)

// openOwnEnvNoFollow is the unix helper's stand-in where there is no
// O_NOFOLLOW or O_NONBLOCK (windows). The agent only runs on Linux; this
// keeps the cross-compiled builds working and still refuses a link it can
// see, by the same Lstat check EnsureAdminToken makes, and a non-file once
// it has opened it. It is check-then-open, so it is weaker than the unix
// open, which is the one that matters.
func openOwnEnvNoFollow(path string, flag int, perm os.FileMode) (*os.File, error) {
	if fi, err := os.Lstat(path); err == nil && fi.Mode()&os.ModeSymlink != 0 {
		return nil, errOwnEnvSymlink
	}
	f, err := os.OpenFile(path, flag, perm)
	if err != nil {
		return nil, err
	}
	st, err := f.Stat()
	if err != nil {
		f.Close()
		return nil, err
	}
	if !st.Mode().IsRegular() {
		f.Close()
		return nil, errOwnEnvNotRegular
	}
	return f, nil
}