libgo/go/os/executable_procfs.go

   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 hurd linux netbsd dragonfly nacl js,wasm
   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 "hurd", "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 }