From 4f65855f372186406f4e48708ec3d5eb9aceb6d3 Mon Sep 17 00:00:00 2001 From: Gabriel Schneider Date: Wed, 30 Sep 2026 22:51:17 -0300 Subject: log stats 0, and pardes re-pins cloud9 whose 9ns opens such a file direct and nonseekable: fs.md's follow recipe with cat works through a mount The log stated the length an open would freeze, a length a mount's kernel could take as its end, and a splicing cat read it from the kernel's offset. log now stats 0, as the other streams and generated views do, and the re-pinned cloud9's 9ns opens any file stating 0 FOPEN_DIRECT_IO | FOPEN_NONSEEKABLE. A look at such a file (the mounted index) reads a regular file that will not seek as a stream rather than refusing it as a pipe. selfmount runs the recipe, exec 3<>log; echo follow >&3; cat <&3, through the mount and hears a record made after it started. Co-Authored-By: Claude Opus 5.5 --- src/ninep/tree.zig | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) (limited to 'src/ninep/tree.zig') diff --git a/src/ninep/tree.zig b/src/ninep/tree.zig index be03e8f0..8c536c51 100644 --- a/src/ninep/tree.zig +++ b/src/ninep/tree.zig @@ -646,7 +646,9 @@ fn topSize(p: *Pardes, f: TopFile) u64 { .README => fs.help.len, .status => ctl.statusLen(p), .look, .exec, .tagexec => ctl.resultsLen(p), - .log => events.logLen(&p.fs.log), + // A stream: a length would read as its end to a kernel that caches + // one (a 9ns mount's splice), and a follower's reads go past it. + .log => 0, .ctl => ctl.rootLen(p), .commands => ctl.commandsLen(), .focus => focus: { @@ -1335,6 +1337,14 @@ test "filesystem inspection preserves pending and displayed Look hover" { try testing.expect(!p.raw_hover_intent); } +test "log stats 0 however much it holds, a stream as acme's generated files are" { + const p = try th.withFile(testing.allocator, "x\n"); + defer p.deinit(); + _ = th.wr(p, Node.of(th.serialOf(p), .exec), "Msg a record for the log\n"); + try testing.expect(th.logHas(p, "a record for the log")); + try testing.expectEqual(@as(u64, 0), call(p, .{ .tag = 1, .op = .getattr, .node = @intFromEnum(TopFile.log) }).reply.attr.size); +} + test "filesystem pane creation and truncation cancel Look hover" { const requests = [_]Req{ // Opening `new` is what makes a pane now; walking to it makes none, -- cgit v1.3