1// Copyright 2012 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
5// +build !go1.8,android !go1.8,linux !go1.8,netbsd !go1.8,solaris !go1.8,dragonfly
6
7package osext
8
9import (
10	"errors"
11	"fmt"
12	"os"
13	"runtime"
14	"strings"
15)
16
17func executable() (string, error) {
18	switch runtime.GOOS {
19	case "linux", "android":
20		const deletedTag = " (deleted)"
21		execpath, err := os.Readlink("/proc/self/exe")
22		if err != nil {
23			return execpath, err
24		}
25		execpath = strings.TrimSuffix(execpath, deletedTag)
26		execpath = strings.TrimPrefix(execpath, deletedTag)
27		return execpath, nil
28	case "netbsd":
29		return os.Readlink("/proc/curproc/exe")
30	case "dragonfly":
31		return os.Readlink("/proc/curproc/file")
32	case "solaris":
33		return os.Readlink(fmt.Sprintf("/proc/%d/path/a.out", os.Getpid()))
34	}
35	return "", errors.New("ExecPath not implemented for " + runtime.GOOS)
36}
37