mirror of https://github.com/k3s-io/k3s
63 lines
1.5 KiB
Go
63 lines
1.5 KiB
Go
|
// Copyright 2015 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.
|
||
|
|
|
||
|
|
// +build solaris
|
||
|
|
|
||
|
|
package fileutil
|
||
|
|
|
||
|
|
import (
|
||
|
|
"os"
|
||
|
|
"syscall"
|
||
|
|
)
|
||
|
|
|
||
|
|
func TryLockFile(path string, flag int, perm os.FileMode) (*LockedFile, error) {
|
||
|
|
var lock syscall.Flock_t
|
||
|
|
lock.Start = 0
|
||
|
|
lock.Len = 0
|
||
|
|
lock.Pid = 0
|
||
|
|
lock.Type = syscall.F_WRLCK
|
||
|
|
lock.Whence = 0
|
||
|
|
lock.Pid = 0
|
||
|
|
f, err := os.OpenFile(path, flag, perm)
|
||
|
|
if err != nil {
|
||
|
|
return nil, err
|
||
|
|
}
|
||
|
|
if err := syscall.FcntlFlock(f.Fd(), syscall.F_SETLK, &lock); err != nil {
|
||
|
|
f.Close()
|
||
|
|
if err == syscall.EAGAIN {
|
||
|
|
err = ErrLocked
|
||
|
|
}
|
||
|
|
return nil, err
|
||
|
|
}
|
||
|
|
return &LockedFile{f}, nil
|
||
|
|
}
|
||
|
|
|
||
|
|
func LockFile(path string, flag int, perm os.FileMode) (*LockedFile, error) {
|
||
|
|
var lock syscall.Flock_t
|
||
|
|
lock.Start = 0
|
||
|
|
lock.Len = 0
|
||
|
|
lock.Pid = 0
|
||
|
|
lock.Type = syscall.F_WRLCK
|
||
|
|
lock.Whence = 0
|
||
|
|
f, err := os.OpenFile(path, flag, perm)
|
||
|
|
if err != nil {
|
||
|
|
return nil, err
|
||
|
|
}
|
||
|
|
if err = syscall.FcntlFlock(f.Fd(), syscall.F_SETLKW, &lock); err != nil {
|
||
|
|
f.Close()
|
||
|
|
return nil, err
|
||
|
|
}
|
||
|
|
return &LockedFile{f}, nil
|
||
|
|
}
|