From 3bb95a59457430e0d91ba5e493603e55bc174fb9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Stephan=20M=C3=BChlstrasser?= <stephan.muehlstrasser@web.de>
Date: Sun, 19 May 2024 01:37:57 +0200
Subject: [PATCH] stdout was no longer line-buffered

Fixed the problem that stdout was no longer line-buffered.

Fixes #35.
---
 libs/circle-newlib              |  2 +-
 samples/05-smoketest/kernel.cpp | 12 ++++++++++++
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/libs/circle-newlib b/libs/circle-newlib
index 584d4c2..abbc9da 160000
--- a/libs/circle-newlib
+++ b/libs/circle-newlib
@@ -1 +1 @@
-Subproject commit 584d4c22e18665d204f4e4169ea29f8e86f6e2ad
+Subproject commit abbc9da973ba43628eddecf525a75df9a1173a27
diff --git a/samples/05-smoketest/kernel.cpp b/samples/05-smoketest/kernel.cpp
index ac35aad..9553679 100644
--- a/samples/05-smoketest/kernel.cpp
+++ b/samples/05-smoketest/kernel.cpp
@@ -577,6 +577,18 @@ CKernel::IoTest (void)
         Report ("fork() is not implemented, fails as expected");
     }
 
+    // Check fix for issue #35.
+    Report ("File descriptors 0, 1, 2 are character special files");
+
+    for (int fd = 0; fd < 3; fd += 1)
+    {
+        struct stat statbuf;
+        if (fstat(fd, &statbuf) == -1 || !S_ISCHR(statbuf.st_mode))
+        {
+            PErrorExit ("Check for S_ISCHR() on stdin/stdout/stderr failed");
+        }
+    };
+
     Report ("Redirect stdout");
 
     FILE * const redirected_stdout = freopen ("redirected_stdout.txt", "w", stdout);