func main() {
if len(os.Args) == 1 {
log.Fatal("Argument required: <lock file>")
}
lockFilePath := os.Args[1]
lockFile, err := os.OpenFile(lockFilePath, os.O_CREATE|os.O_RDWR|os.O_TRUNC, 0600)
if err != nil {
log.Fatal(err)
}
defer lockFile.Close()
err = lockapi.TryLockFile(lockFile)
if err != nil {
log.Fatal(err)
}
fmt.Println("Press ENTER to unlock...")
fmt.Scanln()
err = lockapi.UnlockFile(lockFile)
if err != nil {
log.Fatal(err)
}
fmt.Println("Press ENTER to end...")
fmt.Scanln()
}
func (app *App) LockDirectory() (err error) {
if app.lockFile != nil {
return nil
}
lockFilePath := filepath.Join(app.Directory, lockFileName)
log.Info("The lock file is: %v", lockFilePath)
log.Info("Opening the lock file...")
lockFile, err := os.OpenFile(lockFilePath, os.O_CREATE|os.O_TRUNC|os.O_RDWR, 0600)
if err != nil {
return err
}
log.Info("Obtaining the API lock...")
err = lockapi.TryLockFile(lockFile)
if err != nil {
lockFile.Close()
return err
}
log.Notice("Lock acquired")
app.lockFile = lockFile
return nil
}
func TestNonBlockingFileLockingCalls(t *testing.T) {
lockFile, err := ioutil.TempFile(os.TempDir(), "LockAPI_TestFile")
if err != nil {
t.Fatal(err)
}
defer func() {
lockFile.Close()
os.Remove(lockFile.Name())
}()
err = lockapi.TryLockFile(lockFile)
if err != nil {
t.Fatal(err)
}
err = lockapi.UnlockFile(lockFile)
if err != nil {
t.Fatal(err)
}
}