mirror of https://github.com/kubernetes/kops.git
83 lines
2.1 KiB
Go
83 lines
2.1 KiB
Go
/*
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Copyright 2016 Google Inc. All Rights Reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package logger
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import (
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"fmt"
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"io"
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"strings"
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"golang.org/x/sys/windows"
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"golang.org/x/sys/windows/svc/eventlog"
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)
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type writer struct {
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pri severity
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src string
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el *eventlog.Log
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}
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// Write sends a log message to the Event Log.
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func (w *writer) Write(b []byte) (int, error) {
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switch w.pri {
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case sInfo:
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return len(b), w.el.Info(1, string(b))
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case sWarning:
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return len(b), w.el.Warning(3, string(b))
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case sError:
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return len(b), w.el.Error(2, string(b))
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}
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return 0, fmt.Errorf("unrecognized severity: %v", w.pri)
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}
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func (w *writer) Close() error {
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return w.el.Close()
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}
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func newW(pri severity, src string) (io.WriteCloser, error) {
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// Continue if we receive "registry key already exists" or if we get
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// ERROR_ACCESS_DENIED so that we can log without administrative permissions
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// for pre-existing eventlog sources.
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if err := eventlog.InstallAsEventCreate(src, eventlog.Info|eventlog.Warning|eventlog.Error); err != nil {
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if !strings.Contains(err.Error(), "registry key already exists") && err != windows.ERROR_ACCESS_DENIED {
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return nil, err
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}
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}
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el, err := eventlog.Open(src)
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if err != nil {
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return nil, err
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}
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return &writer{
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pri: pri,
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src: src,
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el: el,
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}, nil
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}
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func setup(src string) (io.WriteCloser, io.WriteCloser, io.WriteCloser, error) {
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infoL, err := newW(sInfo, src)
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if err != nil {
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return nil, nil, nil, err
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}
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warningL, err := newW(sWarning, src)
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if err != nil {
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return nil, nil, nil, err
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}
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errL, err := newW(sError, src)
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if err != nil {
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return nil, nil, nil, err
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}
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return infoL, warningL, errL, nil
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}
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