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| //go:build !windows
|
| package singleinstance
|
| import (
| "fmt"
| "os"
| "path/filepath"
| "syscall"
| )
|
| type unixLock struct {
| file *os.File
| }
|
| // Acquire tries to acquire a file lock. Returns error if another instance holds it.
| func Acquire() (Lock, error) {
| lockPath := filepath.Join(os.TempDir(), "voicesnap.lock")
| f, err := os.OpenFile(lockPath, os.O_CREATE|os.O_RDWR, 0600)
| if err != nil {
| return nil, err
| }
|
| err = syscall.Flock(int(f.Fd()), syscall.LOCK_EX|syscall.LOCK_NB)
| if err != nil {
| f.Close()
| return nil, fmt.Errorf("another instance is already running")
| }
|
| return &unixLock{file: f}, nil
| }
|
| func (l *unixLock) Release() {
| if l.file != nil {
| syscall.Flock(int(l.file.Fd()), syscall.LOCK_UN)
| l.file.Close()
| l.file = nil
| }
| }
|
|
