1 files changed, 59 insertions, 0 deletions
diff --git a/REORG.TODO/stdio-common/errnobug.c b/REORG.TODO/stdio-common/errnobug.c
new file mode 100644
index 0000000000..9b09a3849e
--- /dev/null
+++ b/REORG.TODO/stdio-common/errnobug.c
@@ -0,0 +1,59 @@
+/* Regression test for reported old bug that errno is clobbered
+   by the first successful output to a stream on an unseekable object.
+   Copyright (C) 1995-2017 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <errno.h>
+#include <stdio.h>
+#include <unistd.h>
+
+int
+main (void)
+{
+  int fd[2];
+  FILE *f;
+
+  /* Get a stream that cannot seek.  */
+
+  if (pipe (fd))
+    {
+      perror ("pipe");
+      return 1;
+    }
+  f = fdopen (fd[1], "w");
+  if (f == NULL)
+    {
+      perror ("fdopen");
+      return 1;
+    }
+
+  errno = 0;
+  if (fputs ("fnord", f) == EOF)
+    {
+      perror ("fputs");
+      return 1;
+    }
+
+  if (errno)
+    {
+      perror ("errno gratuitously set -- TEST FAILED");
+      return 1;
+    }
+
+  puts ("Test succeeded.");
+  return 0;
+}