Renew the engine placed by hand to the proved build, and take a hand-over from the controller's terminal (hq issue 356) #74

Merged

mesh-admin merged 4 commits from fix/356-hand-over-by-nox-and-the-engine-on-path-renewed into main 2026-10-09 18:07:21 +00:00

Conversation 9 Commits 4 Files Changed 19

+1306 -74

4 Commits

Author	SHA1	Message	Date
jochen	8fc1d72cd5	Keep the setuid search's time on the caller's clock ... SetuidCache compared the caller's now with a time read from the wall clock when the search finished. When the caller's clock ran behind the wall clock, a search was never due again: TestTheSetuidSearchRunsInTheBackgroundAndIsKeptForItsInterval, whose clock is a fixed date, has failed on main and every branch since 2026-10-09 18:00 UTC. A search's time is now the now it was started at; a result reads at most one search older than it is, which errs towards searching again.	2026-10-09 20:04:11 +02:00
jochen	9a807de659	Give a handed-over directory through no link on every apply, not only the first (hq issue 356, review) ... After the first apply the record is no longer used as found, so the directory read as the mesh's own and later applies set its mode and owner by path: a parent swapped for a link after the hand-over took carried root's chmod and chown to its target. The hand-over is now checked before that shortcut, so a handed-over directory always goes through applyHandedOver. The test swaps the parent and the grandparent after an apply already gave the directory its mode; both cases fail with the old order.	2026-10-09 19:58:27 +02:00
jochen	fc6c5a92e6	Believe a hand-over only signed by the mesh, and give it through no link (hq issue 356, review) ... Two holes the review proved. The ask's subject proved nothing — a responder can reach it through a reply — so the engine now verifies the mesh's signature over a fixed context with the key it verifies declarations with, before reading anything, and refuses an ask for another node, expired, good too long, without a nonce, or replayed. And the apply followed a link the hand-over had refused: a component swapped for a link after the record carried root's chmod and chown to its target. A handed-over directory must now still resolve to itself, and is changed only through one descriptor opened from / with no link followed (fchmod, fchown). Tests for the reply guard, the run loop's hook, the fallback renewal on proof and a non-regular fallback; 27 checks each removed in turn, each failing a test.	2026-10-09 19:45:00 +02:00
jochen	e74ee82a76	Renew the engine placed by hand to the proved build, and take a hand-over from the controller's terminal (hq issue 356) ... The file on PATH was the engine a person copied at installation, and every delivered engine ran from the versions directory: the operator typed hand-over and a build from before it answered "unexpected argument". A proved engine now copies itself over that file when the bytes differ (never a link). And the hand-over of a directory used as found (issue 339) gets its channel: the controller's terminal asks this node's engine on mesh.node.<node>.ask.hand-over; the engine judges every value — the ask's size and shape, who asked, the path as it states it, a directory and no link, through no link — and records it or refuses and records nothing. Every text the engine addresses to the operator names the nox line (ADR 0272); the engine's own subcommands are install-time and rescue, and its usage says so.	2026-10-09 18:34:10 +02:00