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cloud9.post: servers post their socket under a name in
$XDG_RUNTIME_DIR/9p (post/unpost, posted, dial, Watch) and
serve.Runner.listenPosted posts a server by name, unposting on stop.
Names are budget-checked against the 108-byte socket path; a claim
binds+listens at a private temp path and takes the name with atomic
renames under flock (RENAME_NOREPLACE for free names, RENAME_EXCHANGE
grab-verify-commit for stale ones): the registry path is never unlinked
by a claim, live names refuse with AlreadyPosted, foreign files with
NotSocket, and unpost removes only the caller's inode-matched entry.
Watch surfaces inotify overflow and a replaced registry dir.
9ns --mntgen [--mount DIR] -- PROGRAM: one FUSE mount at /mnt/9p whose
synthetic root lists the posted registry (no connection made); a walk
into an unmounted name dials it and runs the existing bridge dispatch
in a per-server worker thread, routed by mount index in the node id's
top bits (ordinals never reused, cap 4096); a dead server answers EIO
on its subtree and is re-dialed on the next walk. The dial watches
stop_fd through Tversion (connectWatched). All existing 9ns forms are
unchanged.
9proc's unix listener no longer blind-unlinks its path: a foreign
non-socket is refused (Occupied), a live server is refused
(AlreadyListening), only a refused socket is cleared, and stop()
unlinks only the listener's own inode-matched socket.
Hardened by adversarial review (GLM 5.3 x2 + DeepSeek V4.1 Flash, all
high-thinking): double-bind races on one name (0 in 180k rounds),
foreign-file TOCTOU deletions (0 in 4M flips), a 255-byte-name listing
panic, inotify queue overflow silently dropped, listenPosted silently
overwriting, dial-time Tversion hangs wedging the dispatcher, --debug
silently ignored in mntgen, and xattr/statx probes answering EPERM on
the synthetic root (broke `ls -l /mnt/9p`).
Tests: root 80/80, 9ns 47/47, 9proc 60/60, integration 88/88 +
mntgen 37/37, adversarial 213/0, freestanding riscv32 gate green.
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One upstream 9P connection now serves any number of browser WebSocket
sessions and, with --serve, plain 9P clients over TCP or Unix (a 9pserve-
style frame remux: tags and fids remapped, Tflush forwarded, reconnect on
upstream loss). /fs/<path> maps HTTP onto the tree: GET file or directory
(JSON or HTML), Range, HEAD with 9P headers, PUT (create, truncate, append,
trailing slash makes a directory), DELETE, and ?follow=1 or text/event-stream
turning a blocking read into server-sent events with Tflush on disconnect.
The page gains a lazy tree, stat panel, create, rename, delete, upload and
follow mode. --probe embeds 9proc for self-introspection. New mux-test and
http-fs-test steps; e2e still passes.
Co-Authored-By: Claude Fable 5.1 <[email protected]>
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Runner(Backend, Options, Limits) listens on Unix or TCP, runs a reader and a
serve task per connection in one Io.Group, pushes frames into an fs.Server,
and lets the backend answer now or later from any task or thread (reply,
flush, wake); Tflush, greet timeout, connection limit, close and stop with
cancellation are covered by tests over real sockets. The engine and the
backend contract stay Io-free, so the push/step mode for freestanding
targets is unchanged. Documented as the two ways to drive the engine.
Co-Authored-By: Claude Fable 5.1 <[email protected]>
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9proc's own fid table, walk loop and dir-read engine are replaced by
cloud9.fs.Server; the tree (static, vars, providers) is served through the
engine's Req/Reply contract with node ids that keep the old qid scheme.
Providers may answer later by returning error.Again (parked in the engine,
retried each step, Tflush -> EINTR); no new files are exposed.
Engine (backward compatible, all opt-in via Backend.features / Options):
create, remove, wstat, reference accounting for backends that count
handles, a salted fid index, name_capacity 0 (names from getattr),
Reply.ename for backend-chosen error text, Attr.path/version/atime.
Engine-level error strings and the 217-byte msize floor now apply to 9proc;
tests updated accordingly.
Co-Authored-By: Claude Fable 5.1 <[email protected]>
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The asynchronous 9P file-server engine from the Pardes editor moves into the
library: fid table, walks, directory cursors, a job/slot model where backend
replies arrive later by tag (status again = parked), Tflush cancellation and
orphaned fids on hangup. Allocation-free, no OS calls, no std.Io; comptime
Options (fid, slot, park data, name and user capacities) replace the
editor's constants. Backend contract types (Req, Reply/ReplyWith, Op,
Status, Attr, E, error strings) live here. 29 engine tests plus the client
tests that sat beside it in Pardes.
Co-Authored-By: Claude Fable 5.1 <[email protected]>
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as Tflush
- --name NAME (default derived from the transport: socket basename, tcp-IP-PORT,
spawned command, fdN) mounts at /mnt/9p/<name>; --mount still overrides.
ensureMountpoint walks down and creates missing components, shadowing the
deepest unwritable ancestor. NINE_MOUNT is the only exported variable.
- The inode number reported to the kernel is the 9P qid.path for every node,
root included; a server handing qid.path 1 to a file (Pardes /self) no
longer collides with the root.
- FUSE_INTERRUPT for the request in flight becomes Tflush; a blocked read
returns EINTR when the server answers the flush, chunked transfers return
short counts, other requests arriving meanwhile are stashed and served
next. Servers ignoring Tflush still block until they answer.
- 9ns-test now covers nine/bridge/fuse; new adv_bridge_interrupt suite (28);
9ns-itest grows to 88 checks.
Co-Authored-By: Claude Fable 5.1 <[email protected]>
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Directories, binaries, build options (-D9ns, -D9proc), step names, module
name (9proc), thread and fs names, env var NINEPLAYER_MOUNT -> NINE_MOUNT,
docs and test scripts. Browser assets move to web/static.
Co-Authored-By: Claude Fable 5.1 <[email protected]>
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9player/: FUSE mount CLI that mounts a 9P2000 tree into a fresh user+mount
namespace and runs a program in it (no root, no libfuse, no libc).
introspect/: the 9P debug/introspection library (freestanding core, value
renderers, Linux probe with threads/stacks/memory/breakpoints/panics) and
its demo server. Each has its own build fragment; the root build.zig wires
them behind -D9player/-Dintrospect with namespaced steps (9player-itest,
introspect-check-freestanding, programs-test, ...) and exports the
introspect module for dependents. This is the layout for related programs.
Co-Authored-By: Claude Fable 5.1 <[email protected]>
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