libgo/go/os/executable_windows.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 package os
   6
   7 import (
   8         "internal/syscall/windows"
   9         "syscall"
  10 )
  11
  12 func getModuleFileName(handle syscall.Handle) (string, error) {
  13         n := uint32(1024)
  14         var buf []uint16
  15         for {
  16                 buf = make([]uint16, n)
  17                 r, err := windows.GetModuleFileName(handle, &buf[0], n)
  18                 if err != nil {
  19                         return "", err
  20                 }
  21                 if r < n {
  22                         break
  23                 }
  24                 // r == n means n not big enough
  25                 n += 1024
  26         }
  27         return syscall.UTF16ToString(buf), nil
  28 }
  29
  30 func executable() (string, error) {
  31         return getModuleFileName(0)
  32 }