pardes.git/src/9p_io.zig, branch release-0.24

Edit's w to a file changed on disk since read is refused once, as Save is (w again to overwrite), the rest of an X/'/w written and the refused named; Edit filters get a pane command's environment ($PARDES_MOUNT, $PARDES_9P, $PARDES_PID, $winid); an Edit with no commands runs beside one whose commands run unless it touches a file that one changes, refused busy (EBUSY) as is a second Edit with commands

2026-10-02T01:58:12Z

Co-Authored-By: Claude Opus 5.5

An Edit's held write: < | > commands no longer block their 9P connection (answered like a held read, so a status read or a filter reading the session's own mount runs beside it), a Tflush or hang-up of the write kills the commands' process groups and changes nothing; e loads by Get's way (asked once, clean after, undo puts the name back); ~ in e r w f B; B checks every name first; an Edit that runs commands is a write of its own, refused up front with other lines; Edit's +Errors output keeps the keyboard where it was; X goes in pane order; a refused write open says its errno; the reference's Coming from acme rows say what Get file's undo, failure and directory refusal, Putall's answer, Zerox across Dump and Incl's directories now do

2026-10-02T01:07:48Z

Co-Authored-By: Claude Opus 5.5

A refused Putall is answered once the other saves have landed; a bad Tab width is invalid (EINVAL), from a pane's exec too; Incl refuses a relative or missing directory and takes - only alone

2026-10-02T00:55:57Z

Co-Authored-By: Claude Opus 5.5

Edit runs acme's file and shell commands: < | > through the session's Shell off the loop (one undo step, a failure changes nothing, its stderr in +Errors, a 9P write answered when done), X and Y over the open text panes, b B D e r f w and the "file" address; checked against sam -d, and the reference's Edit section and Coming from acme row say so

2026-10-01T23:04:42Z

Co-Authored-By: Claude Opus 5.5

A close's held last line runs before the close is answered when no editor step is out, so its err is in the log by then; with a step out it still waits for that step (follows rzxqzosq; monkey9p's one_failure_rule)

2026-10-01T20:46:21Z

Co-Authored-By: Claude Opus 5.5

Every pane pardes spawns gets $PARDES_MOUNT, the session's own directory under 9ns --mntgen ($NINE_MOUNT/pardes/), unset when it is not known

2026-10-01T14:10:37Z

9ns says --mntgen with NINE_MNTGEN=1 (cloud9). Under `9ns --unix` the mount is the server it dialled, never this session (its socket does not exist until it starts), so it stays unset there; scripts fall back to `9p -a "unix!$PARDES_9P"`. Nothing is statted: the name comes from the session's socket and the environment. selfmount checks both modes. Co-Authored-By: Claude Opus 5.5

`> exec` through a mount no longer hangs the editor, and a close holding a last line is answered at once: the line runs at the editor's next step

2026-10-01T14:09:59Z

A shell's truncating open of exec (or look, ctl, log, pager) sends a setattr that changes nothing; it waited for the editor to be quiet, and through a 9ns mount that quiet could never come: 9ns answers nothing else on the mount while the setattr is out, and the editor's step may be out reading a pane's file through it. This was the "truncating open of exec hangs, only in selfmount" mystery. Only a truncate of a pane's file or a tag waits now. A close holding a last line with no newline hands it to the editor's step (tree.runClosedLines, beside fillClosedPagers), as a /pager close does, and is answered at once; a refusal is the log's err. Co-Authored-By: Claude Opus 5.5

A +Pager keeps its program's colours: the session parses what /pager is written after its directory with ghostty-vt, SGR becomes spans drawn over the plain text, every other escape is dropped, and PagerColor off pages it plain

2026-10-01T13:36:28Z

`answer z` quotes `z`, a bare `name` says it names nothing, and `Repl klingon` is invalid (EINVAL), its message citing no doc path

2026-10-01T13:36:28Z

A refused answer quoted the word `answer`, not the choice refused. A `name` with nothing after it was an unknown control message. A Repl of no such language failed EIO with a pointer into the reference; it now says `invalid language` (EINVAL, here and through a mount) and how many more there are. A builtin's failure that says invalid anywhere is EINVAL, as 9ns reads it. Co-Authored-By: Claude Opus 5.5

Mount dials: a relative socket path is a bad dial address, a socket path not there says no such socket (ENOENT), and the hint says tcp! takes a numeric address

2026-10-01T13:36:27Z

`Mount peer rel/x.sock` dialled relative to wherever the editor ran; `Mount peer unix!/nonexistent` said `dial failed: no answer` (EIO); and the hint offered `tcp!host!port` where only a numeric address is taken. Co-Authored-By: Claude Opus 5.5