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/ninep/testing.zig | 29 +++++++++++++++++++++++------ 1 file changed, 23 insertions(+), 6 deletions(-) (limited to 'src/ninep/testing.zig') diff --git a/src/ninep/testing.zig b/src/ninep/testing.zig index ba26cb38..ad1d84e4 100644 --- a/src/ninep/testing.zig +++ b/src/ninep/testing.zig @@ -69,13 +69,30 @@ pub fn look_up(p: *Pardes, dir: u64, name: []const u8) Answer { return call(p, .{ .tag = 3, .op = .lookup, .node = dir, .data = name }); } -/// Opens /new once, as a client would, and returns the pane it made. +/// Creates a pane in /pane, as a client's mkdir does, and returns its serial. pub fn newPane(p: *Pardes) !u32 { - const new = @intFromEnum(tree.TopFile.new); - const opened = call(p, .{ .tag = 9, .op = .open, .node = new }); - if (opened.reply.status != .ok or opened.reply.handle == 0) return error.NoPane; - _ = call(p, .{ .tag = 9, .op = .release, .node = new, .handle = opened.reply.handle }); - return opened.reply.handle; + const made = mkdir(p, "scratch"); + if (made.reply.status != .ok) return error.NoPane; + const target = tree.Node.target(made.reply.attr.node) orelse return error.NoPane; + return switch (target) { + .pane => |t| t.serial, + .top => error.NoPane, + }; +} + +pub fn mkdir(p: *Pardes, name: []const u8) Answer { + return call(p, .{ + .tag = 9, + .op = .open, + .node = @intFromEnum(tree.TopFile.pane), + .data = name, + .create = true, + .perm = 0x8000_0000 | 0o755, + }); +} + +pub fn rmdir(p: *Pardes, node: u64) Answer { + return call(p, .{ .tag = 9, .op = .release, .node = node, .remove = true }); } pub fn withFile(gpa: std.mem.Allocator, text: []const u8) !*Pardes { -- cgit v1.3