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/screen.zig | 25 ++++++++++++++++++------- 1 file changed, 18 insertions(+), 7 deletions(-) (limited to 'src/ninep/screen.zig') diff --git a/src/ninep/screen.zig b/src/ninep/screen.zig index 5b68b34c..2684aa41 100644 --- a/src/ninep/screen.zig +++ b/src/ninep/screen.zig @@ -83,22 +83,33 @@ pub fn releaseSnapshot(p: *Pardes, req: Req) bool { return true; } -pub fn readListeners(p: *Pardes, req: Req) Reply { - var buf: [512]u8 = undefined; - var text = std.Io.Writer.fixed(&buf); +const listeners_cap = 512; + +fn listenersText(p: *Pardes, buf: []u8) []const u8 { + var text = std.Io.Writer.fixed(buf); if (p.fs.socket_path.len != 0) - text.print("unix!{s}\n", .{p.fs.socket_path}) catch return Reply.fail(req.tag, E.IO); + text.print("unix!{s}\n", .{p.fs.socket_path}) catch return text.buffered(); for ([_]?std.Io.net.IpAddress{ p.fs.tcp_address, p.fs.quic_address }, [_][]const u8{ "tcp", "quic" }) |maybe, transport| { const address = maybe orelse continue; switch (address) { .ip4 => |ip| text.print("{s}!{d}.{d}.{d}.{d}!{d}\n", .{ transport, ip.bytes[0], ip.bytes[1], ip.bytes[2], ip.bytes[3], ip.port }) catch - return Reply.fail(req.tag, E.IO), + return text.buffered(), .ip6 => |ip| text.print("{s}!{f}!{d}\n", .{ transport, std.Io.net.Ip6Address.Unresolved{ .bytes = ip.bytes, .interface_name = null }, ip.port }) catch - return Reply.fail(req.tag, E.IO), + return text.buffered(), } } + return text.buffered(); +} + +pub fn listenersLen(p: *Pardes) u64 { + var buf: [listeners_cap]u8 = undefined; + return listenersText(p, &buf).len; +} + +pub fn readListeners(p: *Pardes, req: Req) Reply { + var buf: [listeners_cap]u8 = undefined; const out = p.fs.stage(p.gpa); - out.appendSlice(p.gpa, text.buffered()) catch return Reply.fail(req.tag, E.NOMEM); + out.appendSlice(p.gpa, listenersText(p, &buf)) catch return Reply.fail(req.tag, E.NOMEM); return tree.stagedReply(p, req); } -- cgit v1.3