1 files changed, 52 insertions, 0 deletions
diff --git a/libio/bug-rewind.c b/libio/bug-rewind.c
new file mode 100644
index 0000000000..2a30d28e25
--- /dev/null
+++ b/libio/bug-rewind.c
@@ -0,0 +1,52 @@
+#include <stdio.h>
+#include <wchar.h>
+
+#define PASSED  0
+#define	FAILED  3
+
+
+int
+main (void)
+{
+  FILE *fptr;
+  char arg1;
+  char arg2;
+  int ret, ret1, ret2, result, num;
+
+  ret1 = 0;
+  ret2 = 0;
+
+  if ((fptr = fopen ("./wrewind.dat", "w+")) == NULL)
+    {
+      printf ("Unable to open file.\n");
+      return 1;
+    }
+
+  if ((ret = fwprintf (fptr, L"cderf")) <= 0)
+    {
+      printf ("Unable to write to file with fwprintf().\n");
+      fclose (fptr);
+      return 2;
+    }
+
+  rewind (fptr);
+  ret1 = fwscanf (fptr, L"%c%c", &arg1, &arg2);
+
+  rewind (fptr);
+  ret2 = fwscanf (fptr, L"%c%n%c", &arg1, &num, &arg2);
+
+  if (arg2 != 'd')
+    {
+      result = FAILED;
+      printf ("rewind after first fwscanf failed\n");
+    }
+  else
+    {
+      printf ("Passed\n");
+      result = PASSED;
+    }
+
+
+  fclose (fptr);
+  return result;
+}