Don't accept exp char without preceding digits in scanf float parsing

1 files changed, 37 insertions, 0 deletions

diff --git a/stdio-common/bug26.c b/stdio-common/bug26.c
new file mode 100644
index 0000000000..a4c6bce939
--- /dev/null
+++ b/stdio-common/bug26.c
@@ -0,0 +1,37 @@
+/* Copyright (C) 2013 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 <stdio.h>
+#include <string.h>
+
+int
+main (void)
+{
+  FILE *f;
+  int lost = 0;
+  int c;
+  double d;
+  char s[] = "+.e";
+
+  f = fmemopen (s, strlen (s), "r");
+  /* This should fail to parse a float and leave 'e' in the input.  */
+  lost |= (fscanf (f, "%f", &d) != 0);
+  c = fgetc (f);
+  lost |= c != 'e';
+  puts (lost ? "Test FAILED!" : "Test succeeded.");
+  return lost;
+}