Daan De Meyer
48326af23a
sd_varlink_error() deliberately returns a negative errno mapped from the error id on success so callbacks can `return sd_varlink_error(...);` to enqueue the reply and propagate a matching errno at once. When varlink_dispatch_method() dispatches a configured error sentinel itself, it doesn't need that mapping — but it was treating any negative return as a dispatch failure and logging "Failed to process sentinel" even though the error reply had been successfully enqueued. Detect success via the state transition to VARLINK_PROCESSED_METHOD instead, so only genuine enqueue failures are logged.
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