mesh/merge-gate pass: builds mesh-host → ace, g14, novox, shanks; no bus step; every machine composes with the change as it did without (4 of 4 compose)
A secret given at the controller's terminal through mesh-cli (secret accept … --from -) never reached the
line: the engine forwarded the words only. It now forwards what mesh-cli's standard input held (at most
64 KiB, the SDK's bound) on the same core request to the controller, says it nowhere, and sends none
with a follow of the same call. mesh-sdk moves to f047d0a.
mesh/merge-gate pass: builds mesh-host → ace, g14, novox, shanks; no bus step; every machine composes with the change as it did without (4 of 4 compose)
- UID, CLASS and SCOPE are read at their first occurrence: logind writes
each once, and a later line saying otherwise is not the record's word.
- A comment says /run/systemd/sessions is systemd's private format, and
that a format change fails closed: no session, so nobody is the terminal.
- Tests that hold, each proved by the mutation it guards failing:
- a record naming UID=1001 for session-8.scope under user-1000.slice,
asked as uid 1000 (the record's UID check alone);
- session-a.b.scope with a passing record (the id's characters alone);
- session-9.scope/x.scope (the scope being the slice's direct child);
- a key said twice, either way round (first occurrence);
- the client sends its line only after the session was read, so reading
the session in the forward fails the test.
mesh/merge-gate pass: builds mesh-host → ace, g14, novox, shanks; no bus step; every machine composes with the change as it did without (4 of 4 compose)
The cgroup names a scope; only logind's record of it says whose session it
is. The engine now takes a session only when /run/systemd/sessions/<id>
says it is this account's (UID), of class user (not a greeter's or the
user manager's), and of this very scope. And it reads the session the
moment the connection is accepted, with the namespaces, before the line,
so the peer is judged as it was when it connected.
Tests: session-9.scope with a user record is taken; x.scope, a different
uid, another account's session, a greeter's, a record naming another
scope, no record, and a path with dots are not; the session is read
before the line is forwarded.
mesh/merge-gate pass: builds mesh-host → ace, g14, novox, shanks; no bus step; every machine composes with the change as it did without (4 of 4 compose)
A service running as the operator — the tool runner, a unit of the
account's user manager — shares the operator's user id, and was as much the
terminal on the control-node as a person typing. The engine now reads the
asking process's cgroup and sends its login session's scope
(session-<id>.scope under the account's own user-<uid>.slice), or nothing;
the controller makes nothing else the terminal. The SDK is pinned at its
tag now that go/v0.1.9 exists.
mesh/merge-gate pass: builds mesh-host → ace, g14, novox, shanks; no bus step; every machine composes with the change as it did without (4 of 4 compose)
- Any failure of a request the link may have delivered now says the line
may have run; "nothing ran" is said only of a request the link knows it
never asked (no link open, nobody listening: link.ErrNotAsked).
- A test holds that a connection saying nothing is answered within its
deadline, set at accept, and gives its slot back.
- The README says the socket refuses a process outside the machine's own
namespaces, so flatpak, toolbox and distrobox shells are refused.
mesh/merge-gate pass: builds mesh-host → ace, g14, novox, shanks; no bus step; every machine composes with the change as it did without (4 of 4 compose)
- A request that timed out was said as "the controller was not reached,
nothing ran", though the line may have run. The engine now follows a line
the controller answers as running, by its call, until it ends; when no
answer comes in time it says the line may have run and names the call.
"Nothing ran" is said only of a request no controller took.
- One account could hold the socket: accepting waited for a free slot, and
a connection could stall before its deadline was set. The deadline is set
at accept, before any lookup; each user id has two lines at once and the
machine eight, and one over is answered busy at once.
- A container running with the operator's user id shares the number, not
the machine: a peer whose mount or user namespace is not the engine's is
refused, and nothing is asked.
SDK pinned at the go/cli branch's newest commit until go/v0.1.9 is tagged.
mesh/merge-gate pass: builds mesh-host → ace, g14, novox, shanks; no bus step; every machine composes with the change as it did without (4 of 4 compose)
The records send the operator to "the controller's terminal", and nothing
reaches it (hq issue 343). mesh-cli holds no credential: it asks the engine
on its own machine over a socket. The engine reads the asking account from
the kernel (SO_PEERCRED), never from the program, and asks the controller on
mesh.control.<node>.cli, its own node's subject, so the bus server says which
node asked. The controller decides what the line may do; nothing received
on the socket is run or applied here, and the socket has no network address
(ADR 0004 stands).
The local protocol is the SDK's go/cli package, at a pseudo-version of its
branch until that merges and is tagged go/v0.1.8.
jschoubben
jochen