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client/pkg/fileutil/lock_flock.go
50 строк
1 KB
redwrasse
Replaces a number of error equality checks with errors.Is
04 сен 2024, 02:02
04 сен 2024, 02:02
d4df7a9
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// Copyright 2016 The etcd Authors // // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. // You may obtain a copy of the License at // // http://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software // distributed under the License is distributed on an "AS IS" BASIS, // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // See the License for the specific language governing permissions and // limitations under the License. //go:build !windows && !plan9 && !solaris package fileutil import ( "errors" "os" "syscall" ) func flockTryLockFile(path string, flag int, perm os.FileMode) (*LockedFile, error) { f, err := os.OpenFile(path, flag, perm) if err != nil { return nil, err } if err = syscall.Flock(int(f.Fd()), syscall.LOCK_EX|syscall.LOCK_NB); err != nil { f.Close() if errors.Is(err, syscall.EWOULDBLOCK) { err = ErrLocked } return nil, err } return &LockedFile{f}, nil } func flockLockFile(path string, flag int, perm os.FileMode) (*LockedFile, error) { f, err := os.OpenFile(path, flag, perm) if err != nil { return nil, err } if err = syscall.Flock(int(f.Fd()), syscall.LOCK_EX); err != nil { f.Close() return nil, err } return &LockedFile{f}, err }