From 151681511c4519463c2fe10c656db29a12c01821 Mon Sep 17 00:00:00 2001
From: Simo Sorce <ssorce@redhat.com>
Date: Thu, 28 Jul 2011 15:15:26 -0400
Subject: sss_client: avoid leaking file descriptors

If a pam or nss module is dlcolse()d and unloaded we were leaking
the file descriptor used to communicate to sssd in the process.

Make sure the fucntion used to close the socket file descriptor is
called on dlclose()

Silence autoconf 2.28 warnings (Patch by Jakub Hrozek)

diff --git a/configure.ac b/configure.ac
index 84b83eb..c0b7f8f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -170,6 +170,18 @@ AC_CHECK_HEADERS([sys/inotify.h])
 
 AC_CHECK_HEADERS([sasl/sasl.h],,AC_MSG_ERROR([Could not find SASL headers]))
 
+AC_CACHE_CHECK([whether compiler supports __attribute__((destructor))],
+               sss_client_cv_attribute_destructor,
+               [AC_COMPILE_IFELSE(
+                    [AC_LANG_SOURCE([__attribute__((destructor)) static void cleanup(void) { }])],
+                    sss_client_cv_attribute_destructor=yes)
+               ])
+
+if test x"$sss_client_cv_attribute_destructor" = xyes ; then
+   AC_DEFINE(HAVE_FUNCTION_ATTRIBUTE_DESTRUCTOR, 1,
+             [whether compiler supports __attribute__((destructor))])
+fi
+
 PKG_CHECK_MODULES([CHECK], [check >= 0.9.5], [have_check=1], [have_check=])
 if test x$have_check = x; then
     AC_MSG_WARN([Without the 'CHECK' libraries, you will be unable to run all tests in the 'make check' suite])
diff --git a/src/sss_client/common.c b/src/sss_client/common.c
index c17629a..5f6af41 100644
--- a/src/sss_client/common.c
+++ b/src/sss_client/common.c
@@ -55,6 +55,9 @@
 int sss_cli_sd = -1; /* the sss client socket descriptor */
 struct stat sss_cli_sb; /* the sss client stat buffer */
 
+#if HAVE_FUNCTION_ATTRIBUTE_DESTRUCTOR
+__attribute__((destructor))
+#endif
 static void sss_cli_close_socket(void)
 {
     if (sss_cli_sd != -1) {
-- 
1.7.3.4