- (djm) Added check for broken snprintf() functions which do not correctly

   terminate output string and attempt to use replacement.

1 files changed, 17 insertions, 0 deletions

diff --git a/configure.in b/configure.in
index 8e155f26b..dbc5a18ee 100644
--- a/configure.in
+++ b/configure.in
@@ -235,6 +235,23 @@ AC_CHECK_FUNC(getpagesize,
         [AC_CHECK_LIB(ucb, getpagesize, [LIBS="$LIBS -lucb"; AC_DEFINE(HAVE_GETPAGESIZE)])]
 )
 
+# Check for broken snprintf
+if test "x$ac_cv_func_snprintf" = "xyes" ; then
+        AC_MSG_CHECKING([whether snprintf correctly terminates long strings])
+        AC_TRY_RUN(
+                [
+#include <stdio.h>
+int main(void){char b[5];snprintf(b,5,"123456789");return(b[4]!='\0');}
+                ],
+                [AC_MSG_RESULT(yes)], 
+                [
+                        AC_MSG_RESULT(no)
+                        AC_DEFINE(BROKEN_SNPRINTF)
+                        AC_MSG_WARN([****** Your snprintf() function is broken, complain to your vendor])
+                ]
+        )
+fi
+
 PAM_MSG="no"
 AC_ARG_WITH(pam,
         [  --without-pam           Disable PAM support ],