4a69005fa1
The syscall package is locked down and the comment in [1] advises to switch code to use the corresponding package from golang.org/x/sys. Do so and replace usage of package syscall with package golang.org/x/sys/unix where applicable. [1] https://github.com/golang/go/blob/master/src/syscall/syscall.go#L21-L24 This will also allow to get updates and fixes for syscall wrappers without having to use a new go version. Errno, Signal and SysProcAttr aren't changed as they haven't been implemented in /x/sys/. Stat_t from syscall is used if standard library packages (e.g. os) require it. syscall.SIGTERM is used for cross-platform files.
36 lines
1.0 KiB
Go
36 lines
1.0 KiB
Go
// +build linux darwin freebsd openbsd netbsd dragonfly
|
|
|
|
/*
|
|
Copyright 2016 The Kubernetes 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.
|
|
*/
|
|
|
|
package flock
|
|
|
|
import "golang.org/x/sys/unix"
|
|
|
|
// Acquire acquires a lock on a file for the duration of the process. This method
|
|
// is reentrant.
|
|
func Acquire(path string) error {
|
|
fd, err := unix.Open(path, unix.O_CREAT|unix.O_RDWR, 0600)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
// We don't need to close the fd since we should hold
|
|
// it until the process exits.
|
|
|
|
return unix.Flock(fd, unix.LOCK_EX)
|
|
}
|