---
title: "xpc_connection_set_peer_team_identity_requirement(_:_:)"
framework: xpc
role: symbol
role_heading: Function
path: "xpc/xpc_connection_set_peer_team_identity_requirement(_:_:)"
---

# xpc_connection_set_peer_team_identity_requirement(_:_:)

Sets a requirement that the executable for the peer process has a valid code signature and is signed by the same team identifier as the calling process.

## Declaration

```swift
func xpc_connection_set_peer_team_identity_requirement(_ connection: xpc_connection_t, _ signing_identifier: UnsafePointer<CChar>?) -> Int32
```

## Parameters

- `connection`: The XPC connection.
- `signing_identifier`: The code-signing identifier for the peer process’s executable. This value is typically a Bundle ID for apps and extensions. Pass NULL to indicate that any binary signed by the same team as this process is acceptable.

## Return Value

Return Value On success, 0. Otherwise, a value from Errors.

## Discussion

Discussion When you set this requirement on a connection, the operating system checks that peer process satisfies the requirement every time it sends a message to your process. If the peer process initiated the connection and its executable isn’t signed by the same team, or doesn’t have the correct signing identifier, then you don’t receive a message and the operating system doesn’t call your event handler. If your process sent a message to its peer expecting a reply, and its executable isn’t signed by the same team, or doesn’t have the correct signing identifier, then you don’t receive a reply and the operating system delivers XPC_ERROR_PEER_CODE_SIGNING_REQUIREMENT instead. important: Don’t call this function multiple times for the same connection, or call multiple functions that set code-signing requirements on the same connection. If you use either of these approaches, the system terminates your process with an error.

## See Also

### Remote peer information

- [xpc_connection_get_name(_:)](xpc/xpc_connection_get_name(_:).md)
- [xpc_connection_get_euid(_:)](xpc/xpc_connection_get_euid(_:).md)
- [xpc_connection_get_egid(_:)](xpc/xpc_connection_get_egid(_:).md)
- [xpc_connection_get_pid(_:)](xpc/xpc_connection_get_pid(_:).md)
- [xpc_connection_get_asid(_:)](xpc/xpc_connection_get_asid(_:).md)
- [xpc_connection_set_peer_entitlement_exists_requirement(_:_:)](xpc/xpc_connection_set_peer_entitlement_exists_requirement(_:_:).md)
- [xpc_connection_set_peer_entitlement_matches_value_requirement(_:_:_:)](xpc/xpc_connection_set_peer_entitlement_matches_value_requirement(_:_:_:).md)
- [xpc_connection_set_peer_lightweight_code_requirement(_:_:)](xpc/xpc_connection_set_peer_lightweight_code_requirement(_:_:).md)
- [xpc_connection_set_peer_platform_identity_requirement(_:_:)](xpc/xpc_connection_set_peer_platform_identity_requirement(_:_:).md)
- [xpc_connection_set_peer_code_signing_requirement(_:_:)](xpc/xpc_connection_set_peer_code_signing_requirement(_:_:).md)