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package godaemon
// Copyright (c) 2013-2015 VividCortex, Inc. All rights reserved.
// Please see the LICENSE file for applicable license terms.
import (
"fmt"
"syscall"
"unicode/utf16"
"unsafe"
)
var (
getModuleFileName = syscall.MustLoadDLL("kernel32.dll").MustFindProc("GetModuleFileNameW")
)
// GetExecutablePath returns the absolute path to the currently running
// executable. It is used internally by the godaemon package, and exported
// publicly because it's useful outside of the package too.
func GetExecutablePath() (string, error) {
buf := make([]uint16, syscall.MAX_PATH+1)
res, _, err := getModuleFileName.Call(0, uintptr(unsafe.Pointer(&buf[0])), uintptr(len(buf)))
if res == 0 || res >= syscall.MAX_PATH || buf[0] == 0 || buf[res-1] == 0 {
return "", fmt.Errorf("GetModuleFileNameW returned %d errno=%d", res, err)
}
return string(utf16.Decode(buf[:res])), nil
}
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