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// Copyright 2012 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build windows
package eventlog
import (
"errors"
"golang.org/x/sys/windows"
"golang.org/x/sys/windows/registry"
)
const (
// Log levels.
Info = windows.EVENTLOG_INFORMATION_TYPE
Warning = windows.EVENTLOG_WARNING_TYPE
Error = windows.EVENTLOG_ERROR_TYPE
)
const addKeyName = `SYSTEM\CurrentControlSet\Services\EventLog\Application`
// Install modifies PC registry to allow logging with an event source src.
// It adds all required keys and values to the event log registry key.
// Install uses msgFile as the event message file. If useExpandKey is true,
// the event message file is installed as REG_EXPAND_SZ value,
// otherwise as REG_SZ. Use bitwise of log.Error, log.Warning and
// log.Info to specify events supported by the new event source.
func Install(src, msgFile string, useExpandKey bool, eventsSupported uint32) error {
appkey, err := registry.OpenKey(registry.LOCAL_MACHINE, addKeyName, registry.CREATE_SUB_KEY)
if err != nil {
return err
}
defer appkey.Close()
sk, alreadyExist, err := registry.CreateKey(appkey, src, registry.SET_VALUE)
if err != nil {
return err
}
defer sk.Close()
if alreadyExist {
return errors.New(addKeyName + `\` + src + " registry key already exists")
}
err = sk.SetDWordValue("CustomSource", 1)
if err != nil {
return err
}
if useExpandKey {
err = sk.SetExpandStringValue("EventMessageFile", msgFile)
} else {
err = sk.SetStringValue("EventMessageFile", msgFile)
}
if err != nil {
return err
}
err = sk.SetDWordValue("TypesSupported", eventsSupported)
if err != nil {
return err
}
return nil
}
// InstallAsEventCreate is the same as Install, but uses
// %SystemRoot%\System32\EventCreate.exe as the event message file.
func InstallAsEventCreate(src string, eventsSupported uint32) error {
return Install(src, "%SystemRoot%\\System32\\EventCreate.exe", true, eventsSupported)
}
// Remove deletes all registry elements installed by the correspondent Install.
func Remove(src string) error {
appkey, err := registry.OpenKey(registry.LOCAL_MACHINE, addKeyName, registry.SET_VALUE)
if err != nil {
return err
}
defer appkey.Close()
return registry.DeleteKey(appkey, src)
}
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