trapSignal traps SIGINT and SIGTERM and calls os.Exit once a signal is received.
(cleanupFunc func())
| 456 | |
| 457 | // trapSignal traps SIGINT and SIGTERM and calls os.Exit once a signal is received. |
| 458 | func trapSignal(cleanupFunc func()) { |
| 459 | sigs := make(chan os.Signal, 1) |
| 460 | signal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM) |
| 461 | |
| 462 | go func() { |
| 463 | sig := <-sigs |
| 464 | |
| 465 | if cleanupFunc != nil { |
| 466 | cleanupFunc() |
| 467 | } |
| 468 | exitCode := 128 |
| 469 | |
| 470 | switch sig { |
| 471 | case syscall.SIGINT: |
| 472 | exitCode += int(syscall.SIGINT) |
| 473 | case syscall.SIGTERM: |
| 474 | exitCode += int(syscall.SIGTERM) |
| 475 | } |
| 476 | |
| 477 | os.Exit(exitCode) |
| 478 | }() |
| 479 | } |
| 480 | |
| 481 | // LatestHeight returns the latest height of the network or an error if the |
| 482 | // query fails or no validators exist. |