From 9070942b29bd10dddcdecdb0e88ba0fb40608467 Mon Sep 17 00:00:00 2001 From: Gabriel Schneider Date: Mon, 21 Sep 2026 20:07:43 -0300 Subject: Plan 9 idiom for the control filesystem, and the regressions a624a56 left The 9P tree stops being a command language wearing a filesystem. /new created a pane as a side effect of a *read*; it is now Tcreate in /pane, with Tremove to close, which cloud9's engine has always supported and the editor never declared: tree.zig now says `features = .{ .create = true, .remove = true }`. Eleven pane ctl verbs become files that can be read as well as written -- dot, limit, dirty, mark, scroll, look, exec -- leaving ctl with `get`, the one verb no file would say better. Root /ctl splits into a read-only /status and the /look and /exec files whose write IS the click. stat carries real sizes where it used to answer 0, and qid versions track a pane's revision, so a client can poll for change without re-reading the body. Commit a624a56 moved raw-tty keys to an early-return branch that knew only Ctrl-B and bare Escape, and in the same edit deleted the paste branch below it. That cost Shift-Escape (the unconditional way out of tty mode) and both paste chords: Ctrl-V and Ctrl-Shift-V reached the child as keystrokes, so an agent CLI running in a pane took Ctrl-V for its image-paste binding and answered "No image found in clipboard". Both are restored, with tests. Nested detection was not subtly broken but deleted: 60367d8 removed nested.zig's process-ancestry walk and left "am I inside pardes" derived from PARDES_FORWARD_LOOK, which read "0" both for --nested and for "the listener did not come up". PARDES_PID now answers that question on its own, checked with kill(pid, 0); PARDES_9P and PARDES_PANE answer how to reach it; the flag is gone. The posted-9P registry also self-heals now -- a session that aborts cannot unlink its own socket, so posting sweeps entries whose target refuses a connection, symlinks only and on a definite ECONNREFUSED only. Elsewhere: tty scrolling is sticky-bottom, following new output only from the last row, with typing and entering raw mode snapping back to live; the boot layouts are a Boot enum instead of a chain of ifs, and the bare tty startup (Boot.tty, which main.zig names) opens an empty text pane under the shell while tests keep Boot.tty_shell; builtins announce themselves on the message row under a Verbose setting that is on by default; Config prints each setting the way you would type it back, so WindowOpacity 70 rather than "WindowOpacity: 70%"; LocationsConfig opens its window only when called bare; every tagline puts the word that closes the thing last, and a column now outlives its panes -- closing the last one leaves an empty pane, and only Delcol, newly on the column tagline, takes the column away. Co-Authored-By: Claude Opus 5 (1M context) --- src/fs.zig | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) (limited to 'src/fs.zig') diff --git a/src/fs.zig b/src/fs.zig index 7f416440..7cb08980 100644 --- a/src/fs.zig +++ b/src/fs.zig @@ -260,12 +260,13 @@ test "unmount refuses pane paths inherited directories and queued save targets" } gpa.free(pane.file.?.path); pane.file.?.path = try gpa.dupe(u8, "/n/peer2/file"); - const shell = try p.newShell(1, "/n/peer/dir"); - p.setCwd(1, "/n/peer/dir"); + const slot = p.freeSlot().?; + const shell = try p.newShell(slot, "/n/peer/dir"); + p.setCwd(slot, "/n/peer/dir"); try std.testing.expectError(error.MountInUse, unmount(p, "peer")); pane.cwd = .{ .inherited = shell }; try std.testing.expectError(error.MountInUse, unmount(p, "peer")); - p.setCwd(1, "/"); + p.setCwd(slot, "/"); while (p.nextEffect()) |_| {} p.emit(.{ .save_text = .{ .pane = 0, .serial = pane.serial, .path = .from("/n/peer/pending") } }); try std.testing.expectError(error.MountInUse, unmount(p, "peer")); @@ -1261,10 +1262,10 @@ pub const Namespace = struct { /// The editor-wide event stream, recorded only while /log is held open. log: tree.events.Queue = .{}, log_readers: u16 = 0, - /// What the last ctl command created or touched, answered by reading /ctl. + /// What the last look or exec created or touched, answered by reading + /// either of those files. results: [MAX_PANES]u32 = undefined, results_len: u8 = 0, - results_valid: bool = false, /// Process start, the mtime of everything that has no edit time of its own. started: u32 = 0, -- cgit v1.3