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  }
    33
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