2017-04-06 22:54:33 +00:00
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// Copyright 2012 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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2017-10-06 15:29:20 +00:00
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//+build !go1.8
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2017-04-06 22:54:33 +00:00
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package osext
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import (
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"syscall"
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"unicode/utf16"
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"unsafe"
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)
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var (
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kernel = syscall.MustLoadDLL("kernel32.dll")
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getModuleFileNameProc = kernel.MustFindProc("GetModuleFileNameW")
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)
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// GetModuleFileName() with hModule = NULL
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func executable() (exePath string, err error) {
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return getModuleFileName()
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}
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func getModuleFileName() (string, error) {
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var n uint32
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b := make([]uint16, syscall.MAX_PATH)
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size := uint32(len(b))
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r0, _, e1 := getModuleFileNameProc.Call(0, uintptr(unsafe.Pointer(&b[0])), uintptr(size))
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n = uint32(r0)
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if n == 0 {
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return "", e1
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}
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return string(utf16.Decode(b[0:n])), nil
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}
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