A new terminal is named by its directory from the start, so its shell arriving there is no rename

Tty's terminal was `new N /` until its shell reported its directory, then
`rename N <dir>`: a rename for no change of place. The pane owns the
directory it is started in from the first; only a move elsewhere renames.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

1 files changed, 16 insertions, 0 deletions

diff --git a/src/ninep/ctl.zig b/src/ninep/ctl.zig
index 0ec5dc2a..30091ae1 100644
--- a/src/ninep/ctl.zig
+++ b/src/ninep/ctl.zig
@@ -1856,6 +1856,22 @@ test "Unmount of a name not mounted says no such mount, which a mount reads as E
     try testing.expectStringStartsWith(refused.reply.ename, "Unmount: no such mount nothere");
 }
 
+test "a terminal told the directory it already goes by logs no rename" {
+    const p = try withFile(testing.allocator, "x\n");
+    defer p.deinit();
+    _ = wr(p, Node.of(serialOf(p), .name), "/tmp/f.txt\n");
+    try testing.expectEqual(Status.ok, wr(p, Node.of(serialOf(p), .ctl), "Tty\n").reply.status);
+    p.update(.tick); // announced
+    const term = p.active;
+    // The host says where its shell started: where it was already named.
+    p.setCwd(term, "/tmp");
+    var rec: [32]u8 = undefined;
+    try testing.expect(!th.logHas(p, try std.fmt.bufPrint(&rec, "rename {d} ", .{p.panes[term].?.serial})));
+    // Somewhere else is a rename.
+    p.setCwd(term, "/usr");
+    try testing.expect(th.logHas(p, try std.fmt.bufPrint(&rec, "rename {d} /usr", .{p.panes[term].?.serial})));
+}
+
 test "size is monotonic: growing is never refused, and a size once taken is taken again" {
     const p = try Pardes.init(testing.allocator, .{ .tty_only = true, .cols = 160, .rows = 60 });
     defer p.deinit();