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exexutable

// Copyright 2016 The Go Authors. All rights reserved.// Use of this source code is governed by a BSD-style// license that can be found in the LICENSE file.package os// Executable returns the path name for the executable that started// the current process. There is no guarantee that the path is still// pointing to the correct executable. If a symlink was used to start// the process, depending on the operating system, the result might// be the symlink or the path it pointed to. If a stable result is// needed, path/filepath.EvalSymlinks might help.//// Executable returns an absolute path unless an error occurred.//// The main use case is finding resources located relative to an// executable.func Executable() (string, error) {    return executable()}

Executable() 返回的是可执行文件的门路。