mirror of https://github.com/prometheus/prometheus
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
59 lines
1.3 KiB
59 lines
1.3 KiB
// Copyright 2016 The Prometheus 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 solaris |
|
|
|
package fileutil |
|
|
|
import ( |
|
"os" |
|
"syscall" |
|
) |
|
|
|
type unixLock struct { |
|
f *os.File |
|
} |
|
|
|
func (l *unixLock) Release() error { |
|
if err := l.set(false); err != nil { |
|
return err |
|
} |
|
return l.f.Close() |
|
} |
|
|
|
func (l *unixLock) set(lock bool) error { |
|
flock := syscall.Flock_t{ |
|
Type: syscall.F_UNLCK, |
|
Start: 0, |
|
Len: 0, |
|
Whence: 1, |
|
} |
|
if lock { |
|
flock.Type = syscall.F_WRLCK |
|
} |
|
return syscall.FcntlFlock(l.f.Fd(), syscall.F_SETLK, &flock) |
|
} |
|
|
|
func newLock(fileName string) (Releaser, error) { |
|
f, err := os.OpenFile(fileName, os.O_RDWR|os.O_CREATE, 0o666) |
|
if err != nil { |
|
return nil, err |
|
} |
|
l := &unixLock{f} |
|
err = l.set(true) |
|
if err != nil { |
|
f.Close() |
|
return nil, err |
|
} |
|
return l, nil |
|
}
|
|
|