A terminal's body stats as long as it reads

stat said a terminal's body was 0 bytes while a read gave its screen and
history, and the docs promise real sizes; a client that sizes its read from
stat got nothing. The length is now that of the text a read answers, counted
the way the pane's ctl line already counts it.

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

1 files changed, 17 insertions, 1 deletions

diff --git a/src/ninep/pane.zig b/src/ninep/pane.zig
index 6b6d5728..77be80c6 100644
--- a/src/ninep/pane.zig
+++ b/src/ninep/pane.zig
@@ -194,6 +194,20 @@ pub fn spliceBody(p: *Pardes, pane: *Pane, q0: usize, q1: usize, bytes: []const
     return take;
 }
 
+test "a terminal's body stats as long as it reads" {
+    const gpa = testing.allocator;
+    const p = try pardes.Pardes.init(gpa, .{ .tty_only = true, .cols = 80, .rows = 24 });
+    defer p.deinit();
+    while (p.nextEffect()) |_| {}
+    const pane = p.panes[0].?;
+    try testing.expect(pane.isTerminal());
+    p.update(.{ .output = .{ .pane = 0, .bytes = "$ ls\r\nalpha  beta\r\n$ " } });
+    const body = Node.of(pane.serial, .body);
+    const whole = rd(p, body, 0, 1 << 16);
+    try testing.expect(whole.bytes.len > 0);
+    try testing.expectEqual(@as(u64, whole.bytes.len), call(p, .{ .tag = 1, .op = .getattr, .node = body }).reply.attr.size);
+}
+
 // ---- what stat reports ----
 
 /// A range file's text: acme's addr format, two right-aligned offsets, so
@@ -204,7 +218,9 @@ pub fn fileSize(p: *Pardes, id: usize, f: PaneFile) u64 {
     const pane = p.panes[id] orelse return 0;
     const pf = &pane.fs;
     return switch (f) {
-        .body, .data, .xdata => bodyOf(pane).len,
+        // A terminal's body reads its screen and history, as text.
+        .body => if (pane.file == null and pane.isTerminal()) panes.Terminal.screenTextLen(pane) else bodyOf(pane).len,
+        .data, .xdata => bodyOf(pane).len,
         .tag => tagOf(p, pane).len,
         .name => nameOf(pane).len + 1,
         .ctl => ctl: {