github.com/hlts2/go@v0.0.0-20170904000733-812b34efaed8/src/os/executable_procfs.go (about)

     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  
     5  // +build linux netbsd dragonfly nacl
     6  
     7  package os
     8  
     9  import (
    10  	"errors"
    11  	"runtime"
    12  )
    13  
    14  // We query the executable path at init time to avoid the problem of
    15  // readlink returns a path appended with " (deleted)" when the original
    16  // binary gets deleted.
    17  var executablePath, executablePathErr = func() (string, error) {
    18  	var procfn string
    19  	switch runtime.GOOS {
    20  	default:
    21  		return "", errors.New("Executable not implemented for " + runtime.GOOS)
    22  	case "linux", "android":
    23  		procfn = "/proc/self/exe"
    24  	case "netbsd":
    25  		procfn = "/proc/curproc/exe"
    26  	case "dragonfly":
    27  		procfn = "/proc/curproc/file"
    28  	}
    29  	return Readlink(procfn)
    30  }()
    31  
    32  func executable() (string, error) {
    33  	return executablePath, executablePathErr
    34  }