1// Copyright 2016 The Go Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style
3// license that can be found in the LICENSE file.
4
5package os
6
7import (
8	"syscall"
9	_ "unsafe" // for linkname
10)
11
12//go:linkname executablePath
13var executablePath string // set by sysauxv in ../runtime/os3_solaris.go
14
15var initCwd, initCwdErr = Getwd()
16
17func executable() (string, error) {
18	path := executablePath
19	if len(path) == 0 {
20		path, err := syscall.Getexecname()
21		if err != nil {
22			return path, err
23		}
24	}
25	if len(path) > 0 && path[0] != '/' {
26		if initCwdErr != nil {
27			return path, initCwdErr
28		}
29		if len(path) > 2 && path[0:2] == "./" {
30			// skip "./"
31			path = path[2:]
32		}
33		return initCwd + "/" + path, nil
34	}
35	return path, nil
36}
37