<!--
{
  "availability" : [
    "macCatalyst: -",
    "macOS: -"
  ],
  "documentType" : "symbol",
  "framework" : "EndpointSecurity",
  "identifier" : "/documentation/EndpointSecurity/es_event_bootstrap_check_in_t",
  "metadataVersion" : "0.1.0",
  "role" : "Structure",
  "symbol" : {
    "kind" : "Structure",
    "modules" : [
      "Endpoint Security"
    ],
    "preciseIdentifier" : "c:@SA@es_event_bootstrap_check_in_t"
  },
  "title" : "es_event_bootstrap_check_in_t"
}
-->

# es_event_bootstrap_check_in_t

```
struct es_event_bootstrap_check_in_t
```

## Overview\abstract A process called `bootstrap_check_in()` to register a named service
port with launchd. Subsequent `bootstrap_look_up()` calls from other
processes will resolve the registered name into a send right to this
port.

```
   Submitted by launchd on behalf of the instigator.

   Because launchd is the submitter, the enclosing message's
   `es_message_t.process` describes launchd, not the process that
   called `bootstrap_check_in()`. The actual caller is reported as
   `instigator` / `instigator_token` below.
```

```
                    `bootstrap_check_in()`. Best-effort; may be null if
                    the instigator exited before the event was
                    constructed.
```

```
                    at RPC time. Always present.
```

\note This event type does not support caching.

## Topics

### Initializers

[`init()`](/documentation/EndpointSecurity/es_event_bootstrap_check_in_t/init())

[`init(instigator: UnsafeMutablePointer<es_process_t>?, instigator_token: audit_token_t, service_name: es_string_token_t)`](/documentation/EndpointSecurity/es_event_bootstrap_check_in_t/init(instigator:instigator_token:service_name:))

### Instance Properties

[`var instigator: UnsafeMutablePointer<es_process_t>?`](/documentation/EndpointSecurity/es_event_bootstrap_check_in_t/instigator)

[`var instigator_token: audit_token_t`](/documentation/EndpointSecurity/es_event_bootstrap_check_in_t/instigator_token)

[`var service_name: es_string_token_t`](/documentation/EndpointSecurity/es_event_bootstrap_check_in_t/service_name)

## Relationships

### Conforms To

[`BitwiseCopyable`](/documentation/Swift/BitwiseCopyable)

---

Copyright &copy; 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)