1 files changed, 60 insertions, 0 deletions
diff --git a/stdio/errnobug.c b/stdio/errnobug.c
new file mode 100644
index 0000000000..cf17be30a2
--- /dev/null
+++ b/stdio/errnobug.c
@@ -0,0 +1,60 @@
+/* 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 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 Library General Public License as
+published by the Free Software Foundation; either version 2 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
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#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))
+    {
+      perror ("fputs");
+      return 1;
+    }
+
+  if (errno)
+    {
+      perror ("errno gratuitously set -- TEST FAILED");
+      return 1;
+    }
+
+  puts ("Test succeeded.");
+  return 0;
+}