From 55d429e0ba37c0609f8c713952113078a11bb593 Mon Sep 17 00:00:00 2001
From: Ryan Liptak <squeek502@hotmail.com>
Date: Fri, 9 Oct 2026 22:29:11 -0700
Subject: [PATCH] Threaded.fileStatWindows: disambiguate between files and
 named pipes

---
 lib/std/Io/Threaded.zig |  6 ++++--
 lib/std/fs/test.zig     | 37 +++++++++++++++++++++++++++++++++++++
 2 files changed, 41 insertions(+), 2 deletions(-)

diff --git a/lib/std/Io/Threaded.zig b/lib/std/Io/Threaded.zig
index c6bcd0a456d94d6e2e7658424e228d1a6f216398..1e0b94c86e1e074ac4dee4ad86ddb7a095552102 100644
--- a/lib/std/Io/Threaded.zig
+++ b/lib/std/Io/Threaded.zig
@@ -4221,8 +4221,10 @@ fn fileStatWindows(userdata: ?*anyopaque, file: File) File.StatError!File.Stat {
             break :reparse_point .unknown;
         } else if (info.BasicInformation.FileAttributes.DIRECTORY)
             .directory
-        else
-            .file,
+        else switch (try windowsGetFileDevice(file)) {
+            .NAMED_PIPE => .named_pipe,
+            else => .file,
+        },
         .atime = windows.fromSysTime(info.BasicInformation.LastAccessTime),
         .mtime = windows.fromSysTime(info.BasicInformation.LastWriteTime),
         .ctime = windows.fromSysTime(info.BasicInformation.ChangeTime),
diff --git a/lib/std/fs/test.zig b/lib/std/fs/test.zig
index 75a1dfe70305f73fdc0c1e8245ad2d3fb43db5b0..a1bddd0bf6c33ffa1e071719af767a01acfb9b50 100644
--- a/lib/std/fs/test.zig
+++ b/lib/std/fs/test.zig
@@ -298,6 +298,43 @@ test "File.stat on a File that is a symlink returns Kind.sym_link" {
     }.impl);
 }
 
+test "File.stat on a File that is a named pipe returns Kind.named_pipe" {
+    // Creating pipes is Io.Threaded-specific
+    var threaded: std.Io.Threaded = .init(std.testing.allocator, .{
+        .argv0 = .empty,
+        .environ = .empty,
+    });
+    defer threaded.deinit();
+    const io = threaded.io();
+
+    var read_end: Io.File = undefined;
+    var write_end: Io.File = undefined;
+    switch (builtin.target.os.tag) {
+        .wasi => return error.SkipZigTest,
+        .windows => {
+            const pipe = try threaded.windowsCreatePipe(.{
+                .server = .{ .mode = .{ .IO = .SYNCHRONOUS_NONALERT } },
+                .client = .{ .mode = .{ .IO = .SYNCHRONOUS_NONALERT } },
+                .inbound = true,
+            });
+            read_end = .{ .handle = pipe[0], .flags = .{ .nonblocking = false } };
+            write_end = .{ .handle = pipe[1], .flags = .{ .nonblocking = false } };
+        },
+        else => {
+            const pipe = try std.Io.Threaded.pipe2(.{ .CLOEXEC = true });
+            read_end = .{ .handle = pipe[0], .flags = .{ .nonblocking = false } };
+            write_end = .{ .handle = pipe[1], .flags = .{ .nonblocking = false } };
+        },
+    }
+    defer {
+        read_end.close(io);
+        write_end.close(io);
+    }
+
+    try expectEqual(.named_pipe, (try read_end.stat(io)).kind);
+    try expectEqual(.named_pipe, (try write_end.stat(io)).kind);
+}
+
 test "Dir.statFile on a symlink" {
     const io = testing.io;
 
-- 
2.54.0