25 lines
509 B
Go
25 lines
509 B
Go
//go:build !windows
|
|
|
|
package main
|
|
|
|
import (
|
|
"fmt"
|
|
"os"
|
|
"syscall"
|
|
)
|
|
|
|
func acquireLock(path string) (func(), error) {
|
|
file, err := os.OpenFile(path, os.O_CREATE|os.O_RDWR, 0o600)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
if err := syscall.Flock(int(file.Fd()), syscall.LOCK_EX|syscall.LOCK_NB); err != nil {
|
|
_ = file.Close()
|
|
return nil, fmt.Errorf("another test harness process holds %s: %w", path, err)
|
|
}
|
|
return func() {
|
|
_ = syscall.Flock(int(file.Fd()), syscall.LOCK_UN)
|
|
_ = file.Close()
|
|
}, nil
|
|
}
|