An offline IPC trace author needs which anonymous message a Linux msgrcv selecto...

{ "body": { "artifact": { "sysv_messages": { "capacity_bytes": 32, "claim": 2, "events": [ { "copy": false, "except": false, "max_bytes": 512, "op": "receive", "selector": -3, "truncate": false }, { "copy": false, "except": false, "max_bytes": 512, "op": "receive", "selector": -3, "truncate": false } ], "messages": [ { "id": 1, "size": 4, "type": 3 }, { "id": 2, "size": 2, "type": 1 }, { "id": 3, "size": 3, "type": 1 }, { "id": 4, "size": 1, "type": 2 } ] } } }, "bodyType": "json", "method": "POST", "type": "http" }

{ "example": { "billable": true, "findings": [ { "confidence": 100, "evidence": [], "limits": [ "Only the explicitly supplied bounded anonymous operand model and exact integer claim are evaluated.", "No external resource or native system is queried or changed; source contents and contact values are not returned.", "This is a declared-model correspondence finding without a security, legal, operational or compliance verdict." ], "module": "sysv-message-type-selection-removal", "state": "not_observed", "value": { "claim_matches": true, "destructively_received_messages": 2, "final_message_descriptors": [ [ 1, 3, 4 ], [ 4, 2, 1 ] ], "nondestructive_copies": 0, "operation_outcomes": [ [ 0, 2, 2 ], [ 0, 3, 3 ] ], "queue_length_trace": [ 3, 2 ], "queued_body_octets": 5, "returned_body_octet_count": 5, "statistic": 2, "successful_sends": 0 }, "warnings": [] } ], "known_count": 1, "scope": { "contact_values_returned": false, "network": false, "supplied_artifact_only": true }, "warnings": [] }, "type": "json" }