From 6f39ce93ce358743df0abe1acdac75f3fd6a2eab Mon Sep 17 00:00:00 2001
From: Takeshi Yoneda <takeshi@tetrate.io>
Date: Sun, 11 Dec 2022 17:44:38 +0900
Subject: [PATCH] wasi: fixes os.isatty on type mismatch (#13813)

---
 lib/std/os.zig      | 2 +-
 lib/std/os/test.zig | 8 ++++++++
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/lib/std/os.zig b/lib/std/os.zig
index 03c96e6121b8190aa24b23a463aedfdbe6d36872..172218a2ab6f9efd47cd7a0d8a8517c85e4b5ecd 100644
--- a/lib/std/os.zig
+++ b/lib/std/os.zig
@@ -3290,7 +3290,7 @@ pub fn isatty(handle: fd_t) bool {
     if (builtin.os.tag == .wasi) {
         var statbuf: fdstat_t = undefined;
         const err = system.fd_fdstat_get(handle, &statbuf);
-        if (err != 0) {
+        if (err != .SUCCESS) {
             // errno = err;
             return false;
         }
diff --git a/lib/std/os/test.zig b/lib/std/os/test.zig
index 7628b42dd65c7c0e7750149d533251b41837dab7..85e325ee5dc34a4d4abf0e570b353a6e666ca9ce 100644
--- a/lib/std/os/test.zig
+++ b/lib/std/os/test.zig
@@ -1077,3 +1077,11 @@ test "timerfd" {
     try os.timerfd_settime(tfd, 0, &sit, null);
     try expectEqual(try os.poll(&fds, 5), 0);
 }
+
+test "isatty" {
+    var tmp = tmpDir(.{});
+    defer tmp.cleanup();
+
+    var file = try tmp.dir.createFile("foo", .{});
+    try expectEqual(os.isatty(file.handle), false);
+}
-- 
2.54.0