go.etcd.io/etcd@v3.3.27+incompatible/pkg/osutil/osutil.go (about) 1 // Copyright 2015 The etcd 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 // Package osutil implements operating system-related utility functions. 16 package osutil 17 18 import ( 19 "os" 20 "strings" 21 22 "github.com/coreos/pkg/capnslog" 23 ) 24 25 var ( 26 plog = capnslog.NewPackageLogger("github.com/coreos/etcd", "pkg/osutil") 27 28 // support to override setting SIG_DFL so tests don't terminate early 29 setDflSignal = dflSignal 30 ) 31 32 func Unsetenv(key string) error { 33 envs := os.Environ() 34 os.Clearenv() 35 for _, e := range envs { 36 strs := strings.SplitN(e, "=", 2) 37 if strs[0] == key { 38 continue 39 } 40 if err := os.Setenv(strs[0], strs[1]); err != nil { 41 return err 42 } 43 } 44 return nil 45 }