mirror of
https://github.com/prometheus-community/windows_exporter.git
synced 2026-02-08 05:56:37 +00:00
89 lines
2.0 KiB
Go
89 lines
2.0 KiB
Go
// Copyright 2024 The Prometheus Authors
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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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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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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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//go:build windows
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package log
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import (
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"errors"
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"fmt"
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"io"
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"log/slog"
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"os"
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"github.com/prometheus-community/windows_exporter/internal/log/eventlog"
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"github.com/prometheus/common/promslog"
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"golang.org/x/sys/windows"
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)
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// AllowedFile is a settable identifier for the output file that the logger can have.
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type AllowedFile struct {
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s string
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w io.Writer
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}
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func (f *AllowedFile) String() string {
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if f == nil {
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return ""
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}
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return f.s
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}
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// Set updates the value of the allowed format.
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func (f *AllowedFile) Set(s string) error {
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f.s = s
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switch s {
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case "stdout":
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f.w = os.Stdout
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case "stderr":
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f.w = os.Stderr
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case "eventlog":
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handle, err := windows.RegisterEventSource(nil, windows.StringToUTF16Ptr("windows_exporter"))
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if err != nil {
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return fmt.Errorf("failed to open event log: %w", err)
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}
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f.w = eventlog.NewEventLogWriter(handle)
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default:
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file, err := os.OpenFile(s, os.O_WRONLY|os.O_CREATE|os.O_APPEND, 0o200)
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if err != nil {
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return fmt.Errorf("failed to open log file: %w", err)
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}
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f.w = file
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}
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return nil
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}
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// Config is a struct containing configurable settings for the logger.
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type Config struct {
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*promslog.Config
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File *AllowedFile
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}
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func New(config *Config) (*slog.Logger, error) {
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if config.File == nil {
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return nil, errors.New("log file undefined")
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}
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config.Config.Writer = config.File.w
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config.Config.Style = promslog.SlogStyle
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return promslog.New(config.Config), nil
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}
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