1 // Copyright 2022 CoreOS, Inc. 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License 14 15 package main 16 17 import ( 18 "fmt" 19 "os" 20 21 "github.com/coreos/go-systemd/v22/journal" 22 ) 23 24 func main() { 25 ok, err := journal.StderrIsJournalStream() 26 if err != nil { 27 panic(err) 28 } 29 30 if ok { 31 // use journal native protocol 32 journal.Send("this is a message logged through the native protocol", journal.PriInfo, nil) 33 } else { 34 // use stderr 35 fmt.Fprintln(os.Stderr, "this is a message logged through stderr") 36 } 37 } 38