A Blocking accept() Disables the Diagnostic Channel: Root-Cause Analysis and Repair of the AppleBridge Control Port

Fri, 24 Jul 2026 09:58:40 +0200

A defect in the AppleBridge host server made the entire bridge appear to hang whenever the emulated Macintosh was not connected. The cause was a single blocking accept() call positioned ahead of the control-port service loop. Its most damaging consequence was self-referential: the one diagnostic endpoint designed to report which layer had failed was itself disabled by the failure it was meant to describe. This report documents the symptom, the root-cause analysis, the repair, and the measured verification.

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A Blocking accept() Disables the Diagnostic Channel: Root-Cause Analysis and Repair of the AppleBridge Control Port