Fix CVE-2016-1531

[exim.git] / src / src / string.c

diff --git a/src/src/string.c b/src/src/string.c
index c50a347c2f94f50258378dff7455e07bcef6656e..b7e7db48796064bb0570e8baf16d88c689d48506 100644 (file)
--- a/src/src/string.c
+++ b/src/src/string.c
@@ -2,7 +2,7 @@
 *     Exim - an Internet mail transport agent    *
 *************************************************/
 
-/* Copyright (c) University of Cambridge 1995 - 2014 */
+/* Copyright (c) University of Cambridge 1995 - 2015 */
 /* See the file NOTICE for conditions of use and distribution. */
 
 /* Miscellaneous string-handling functions. Some are not required for
@@ -1706,6 +1706,17 @@ return yield;
 #endif  /* COMPILE_UTILITY */
 
 
+#ifndef COMPILE_UTILITY
+/* qsort(3), currently used to sort the environment variables
+for -bP environment output, needs a function to compare two pointers to string
+pointers. Here it is. */
+
+int
+string_compare_by_pointer(const uschar **a, const uschar **b)
+{
+return Ustrcmp(CUS *a, CUS *b);
+}
+#endif /* COMPILE_UTILITY */