1 // Copyright The OpenTelemetry Authors 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 // +build !darwin 16 // +build !dragonfly 17 // +build !freebsd 18 // +build !linux 19 // +build !netbsd 20 // +build !openbsd 21 // +build !solaris 22 // +build !windows 23 24 package resource // import "go.opentelemetry.io/otel/sdk/resource" 25 26 // hostIDReaderUnsupported is a placeholder implementation for operating systems 27 // for which this project currently doesn't support host.id 28 // attribute detection. See build tags declaration early on this file 29 // for a list of unsupported OSes. 30 type hostIDReaderUnsupported struct{} 31 32 func (*hostIDReaderUnsupported) read() (string, error) { 33 return "<unknown>", nil 34 } 35 36 var platformHostIDReader hostIDReader = &hostIDReaderUnsupported{} 37