From ebb778ff7053303e3ee68c77c9d7e6aaceaf86ab Mon Sep 17 00:00:00 2001
From: Fabio Erculiani <lxnay@sabayon.org>
Date: Mon, 29 Apr 2013 10:46:23 +0100
Subject: [PATCH] Detect logind at runtime

---
 kdm/backend/client.c | 42 +++++++++++++++++++++++++-----------------
 1 file changed, 25 insertions(+), 17 deletions(-)

diff --git a/kdm/backend/client.c b/kdm/backend/client.c
index bdff6da..a2760b6 100644
--- a/kdm/backend/client.c
+++ b/kdm/backend/client.c
@@ -88,6 +88,9 @@ extern int loginsuccess(const char *User, const char *Host, const char *Tty, cha
 #endif
 #include <signal.h>
 
+#include <unistd.h>
+#define LOGIND_RUNNING() (access("/run/systemd/seats/", F_OK) >= 0)
+
 /*
  * Session data, mostly what struct verify_info was for
  */
@@ -1342,11 +1345,12 @@ startClient(volatile int *pid)
     strcpy(curuser, p->pw_name); /* Use normalized login name. */
 
 #ifdef HAVE_CKCONNECTOR
-    if (!(ckConnector = ck_connector_new())) {
-        logOutOfMem();
-        V_RET;
+    if (!LOGIND_RUNNING()) {
+        if (!(ckConnector = ck_connector_new())) {
+            logOutOfMem();
+            V_RET;
+        }
     }
-    
 # ifdef HAVE_VTS
     if (td->serverVT > 0)
         sprintf(ckDeviceBuf, "/dev/tty%d", td->serverVT);
@@ -1390,7 +1394,7 @@ startClient(volatile int *pid)
                        "Warning: Cannot open ConsoleKit session: %s",
                        error.message);
             dbus_error_free(&error);
-        } else {
+        } else if (!LOGIND_RUNNING()) {
             logError("Cannot open ConsoleKit session, likely OOM\n");
             displayStr(V_MSG_ERR,
                        "Warning: Cannot open ConsoleKit session.");
@@ -1452,8 +1456,10 @@ startClient(volatile int *pid)
         env = setEnv(env, "KRBTKFILE", krbtkfile);
 #endif
 #ifdef HAVE_CKCONNECTOR
-    env = setEnv(env, "XDG_SESSION_COOKIE",
-                      ck_connector_get_cookie(ckConnector));
+    if (!LOGIND_RUNNING()) {
+        env = setEnv(env, "XDG_SESSION_COOKIE",
+                          ck_connector_get_cookie(ckConnector));
+    }
 #endif
     userEnviron = inheritEnv(env, envvars);
     env = systemEnv(0, curuser);
@@ -1949,18 +1955,20 @@ clientExited(void)
 #endif
 
 #ifdef HAVE_CKCONNECTOR
-    if (ckConnector) {
-        dbus_error_init(&error);
-        if (!ck_connector_close_session(ckConnector, &error)) {
-            if (dbus_error_is_set(&error)) {
-                logError("Cannot close ConsoleKit session: %s\n", error.message);
-                dbus_error_free(&error);
-            } else {
-                logError("Cannot close ConsoleKit session, likely OOM\n");
+    if (!LOGIND_RUNNING()) {
+        if (ckConnector) {
+            dbus_error_init(&error);
+            if (!ck_connector_close_session(ckConnector, &error)) {
+                if (dbus_error_is_set(&error)) {
+                    logError("Cannot close ConsoleKit session: %s\n", error.message);
+                    dbus_error_free(&error);
+                } else {
+                    logError("Cannot close ConsoleKit session, likely OOM\n");
+                }
             }
+            ck_connector_unref(ckConnector);
+            ckConnector = 0;
         }
-        ck_connector_unref(ckConnector);
-        ckConnector = 0;
     }
 #endif
 }
-- 
1.8.1.5