A shell given a directory is not taken to be in this process's before it has spoken, so it logs no rename to the session's and back

Each host read /proc/<pid>/cwd right after forking the shell and at every
frame after; before the shell's chdir that says this process's directory,
a rename to it, then the real one a frame later, a rename back. A shell
given a directory is named by it already (newShell) and is no longer
asked at fork; and until it has printed anything, an answer naming this
process's directory is not taken.

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

1 files changed, 6 insertions, 0 deletions

diff --git a/src/ninep/ctl.zig b/src/ninep/ctl.zig
index 95d81e3b..66092451 100644
--- a/src/ninep/ctl.zig
+++ b/src/ninep/ctl.zig
@@ -1881,6 +1881,12 @@ test "a terminal told the directory it already goes by logs no rename" {
     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})));
+    // This process's directory, asked before the shell has said anything
+    // (so before its chdir): not taken.
+    const session = p.sessionDir();
+    p.setCwd(term, session);
+    try testing.expect(!th.logHas(p, try std.fmt.bufPrint(&rec, "rename {d} ", .{p.panes[term].?.serial})));
+    p.update(.{ .output = .{ .pane = @intCast(term), .bytes = "$ " } });
     // 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})));