diff options
| -rw-r--r-- | docs/fs.md | 4 | ||||
| -rw-r--r-- | src/ninep/cols.zig | 12 |
2 files changed, 15 insertions, 1 deletions
@@ -371,7 +371,9 @@ non-UTF-8 bytes are refused (`invalid tag text`). The editable text is at most 4096 bytes (`no space: over 4096 bytes`, ENOSPC; the log says `err <serial> tag: no space: ...`). All three kinds take the same checks, whole or not at all, and a `>` whose write is refused changes nothing: its truncation is done with the write that fits, or at the -close (or a read) when none came. A clear is an ordinary edit +close (or a read) when none came. Each write stands on its own: in a `>` +cut into several writes, those taken before a refused one stay in the +tag; only the refused write changes nothing. A clear is an ordinary edit and `u` in the tag undoes it. [tags.md](tags.md) covers tags on screen. ## Panes diff --git a/src/ninep/cols.zig b/src/ninep/cols.zig index 4e497545..a1fe9ecc 100644 --- a/src/ninep/cols.zig +++ b/src/ninep/cols.zig @@ -253,6 +253,18 @@ test "pane/new takes rows from a pane in another column before refusing ENOSPC" try testing.expect(moved); } +test "in a > cut into several tag writes, those taken before a refused one stand" { + const p = try th.withFile(testing.allocator, "x\n"); + defer p.deinit(); + const node = tree.Node.of(th.serialOf(p), .tag); + _ = th.call(p, .{ .tag = 1, .op = .setattr, .node = node, .truncate = true }); + const h = th.call(p, .{ .tag = 2, .op = .open, .node = node, .omode = 1 }).reply.handle; + try testing.expectEqual(tree.Status.ok, th.call(p, .{ .tag = 3, .op = .write, .node = node, .handle = h, .data = "Make" }).reply.status); + try testing.expectEqual(E.INVAL, th.call(p, .{ .tag = 4, .op = .write, .node = node, .handle = h, .data = " \x01" }).errno()); + _ = th.call(p, .{ .tag = 5, .op = .release, .node = node, .handle = h, .opened = true }); + try testing.expect(std.mem.endsWith(u8, th.rd(p, node, 0, 4096).bytes, "Make")); +} + test "exactly 4096 bytes written with echo's newline after a truncation fit every kind of tag" { const p = try th.withFile(testing.allocator, "x\n"); defer p.deinit(); |