diff options
Diffstat (limited to 'src/ninep/events.zig')
| -rw-r--r-- | src/ninep/events.zig | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/src/ninep/events.zig b/src/ninep/events.zig index fa0a4975..20cdeda4 100644 --- a/src/ninep/events.zig +++ b/src/ninep/events.zig @@ -208,10 +208,11 @@ pub fn readLog(p: *Pardes, req: Req) Reply { if (slot.node != req.node) return Reply.fail(req.tag, E.INVAL); const frozen = slot.bytes orelse &.{}; const out = p.fs.stage(p.gpa); - if (!slot.follow or req.off < frozen.len) { - const off = @min(req.off, frozen.len); + if (!slot.follow or slot.pos < frozen.len) { + const off = @min(slot.pos, frozen.len); const len = @min(frozen.len - off, req.size); out.appendSlice(p.gpa, frozen[off..][0..len]) catch return Reply.fail(req.tag, E.NOMEM); + slot.pos += len; return .{ .tag = req.tag, .payload = .{ .staged = @intCast(len) } }; } const q = &p.fs.log; @@ -678,6 +679,8 @@ test "the log records whether or not anyone reads, and an open that follows wait const frozen = call(p, .{ .tag = 6, .op = .read, .node = log, .handle = fh, .size = 8192 }).bytes.len; try testing.expectEqual(Status.err, call(p, .{ .tag = 7, .op = .write, .node = log, .handle = fh, .data = "tail\n" }).reply.status); try testing.expectEqual(Status.ok, call(p, .{ .tag = 8, .op = .write, .node = log, .handle = fh, .data = "follow\n" }).reply.status); + // A stream: after `echo follow >&3` a shell reads at offset 7, and gets + // what comes next, not the frozen text from byte 7. const rdf = struct { fn next(pp: *Pardes, node: u64, h: u32, off: u64) th.Answer { return call(pp, .{ .tag = 9, .op = .read, .node = node, .handle = h, .off = off, .size = 8192 }); |