From c05bf1914146281a934d573354c2fce2f466706e Mon Sep 17 00:00:00 2001
From: Lukas Slebodnik <lslebodn@redhat.com>
Date: Jun 03 2014 11:52:45 +0000
Subject: PAM: Define compatible macros for some functions.


Functions pam_vsyslog and pam_modutil_getlogin are not available in openpam.
This patch conditionally define macros for these function if they are not
available. Compatible macros use standard functions vsyslog, getlogin

Reviewed-by: Sumit Bose <sbose@redhat.com>
(cherry picked from commit 683e1f67d08be7165ea456d4594c4c8a4eddc9b3)

---

diff --git a/Makefile.am b/Makefile.am
index 83ba673..9fddf36 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -1695,7 +1695,8 @@ pam_sss_la_SOURCES = \
     src/sss_client/common.c \
     src/sss_client/sss_cli.h \
     src/util/atomic_io.c \
-    src/sss_client/sss_pam_macros.h
+    src/sss_client/sss_pam_macros.h \
+    src/sss_client/sss_pam_compat.h
 
 pam_sss_la_LIBADD = \
     $(CLIENT_LIBS) \
diff --git a/src/external/pam.m4 b/src/external/pam.m4
index 90f89be..4776b6a 100644
--- a/src/external/pam.m4
+++ b/src/external/pam.m4
@@ -18,3 +18,12 @@ AC_CHECK_HEADERS([security/openpam.h],,,[
 
 AC_CHECK_LIB([pam_misc], [misc_conv],
     [PAM_MISC_LIBS="-lpam_misc"])
+
+dnl save LIBS to restore later
+save_LIBS="$LIBS"
+LIBS="$PAM_LIBS"
+
+AC_CHECK_FUNCS(pam_modutil_getlogin pam_vsyslog)
+
+dnl restore LIBS
+LIBS="$save_LIBS"
diff --git a/src/sss_client/pam_sss.c b/src/sss_client/pam_sss.c
index db18348..3a3935a 100644
--- a/src/sss_client/pam_sss.c
+++ b/src/sss_client/pam_sss.c
@@ -40,8 +40,8 @@
 
 #include <security/pam_modules.h>
 #include <security/pam_appl.h>
-#include <security/pam_ext.h>
-#include <security/pam_modutil.h>
+
+#include "sss_pam_compat.h"
 #include "sss_pam_macros.h"
 
 #include "sss_cli.h"
diff --git a/src/sss_client/sss_pam_compat.h b/src/sss_client/sss_pam_compat.h
new file mode 100644
index 0000000..d131cea
--- /dev/null
+++ b/src/sss_client/sss_pam_compat.h
@@ -0,0 +1,45 @@
+/*
+   SSSD
+
+   Compat declarations for PAM.
+
+   Authors:
+        Lukas Slebodnik <lslebodn@redhat.com>
+
+   Copyright (C) Red Hat, Inc 2014
+
+   This program 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 3 of the License, or
+   (at your option) any later version.
+
+   This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef _SSS_PAM_COMPAT_H
+#define _SSS_PAM_COMPAT_H
+
+#ifdef HAVE_SECURITY_PAM_MODUTIL_H
+# include <security/pam_modutil.h>
+#endif /* HAVE_SECURITY_PAM_MODUTIL_H */
+
+#ifdef HAVE_SECURITY_PAM_EXT_H
+# include <security/pam_ext.h>
+#endif /* HAVE_SECURITY_PAM_EXT_H */
+
+#ifndef HAVE_PAM_VSYSLOG
+#define pam_vsyslog(pamh, priority, fmt, vargs) \
+    vsyslog((priority), (fmt), (vargs))
+#endif /* HAVE_PAM_VSYSLOG */
+
+#ifndef PAM_BAD_ITEM
+# define PAM_BAD_ITEM PAM_USER_UNKNOWN
+#endif /* PAM_BAD_ITEM */
+
+#endif /* _SSS_PAM_COMPAT_H */