core: allow ConsoleKit usage to be disabled

configure.ac

@@ -253,6 +253,19 @@ if test "x$with_systemdsystemunitdir" != xno; then
 fi
 AM_CONDITIONAL(HAVE_SYSTEMD, [test -n "$with_systemdsystemunitdir" -a "x$with_systemdsystemunitdir" != xno ])
 
+dnl
+dnl Disable ConsoleKit support
+dnl
+AC_ARG_WITH(ck, AS_HELP_STRING([--without-ck], [Build NetworkManager without ConsoleKit session tracking support]))
+AM_CONDITIONAL(WITH_CONSOLEKIT, test x"$with_ck" != xno)
+no_ck=0
+if test x"$with_ck" = x"no"; then
+	no_ck="1"
+else
+	with_ck="yes"
+fi
+AC_DEFINE_UNQUOTED(NO_CONSOLEKIT, $no_ck, [Define to disable use of ConsoleKit])
+
 PKG_CHECK_MODULES(LIBNL, libnl-1 >= 1.0-pre8)
 AC_SUBST(LIBNL_CFLAGS)
 AC_SUBST(LIBNL_LIBS)
@@ -597,6 +610,12 @@ else
 	echo systemd support: no
 fi
 
+if test -n "${with_ck}"; then
+	echo ConsoleKit support: ${with_ck}
+else
+	echo ConsoleKit support: no
+fi
+
 echo
 echo Building documentation: ${with_docs}
 echo Building tests: ${with_tests}

src/nm-session-monitor.c

@@ -260,6 +260,10 @@ ensure_database (NMSessionMonitor *self, GError **error)
 {
 	gboolean ret = FALSE;
 
+#if NO_CONSOLEKIT
+	return TRUE;
+#endif
+
 	if (self->database != NULL) {
 		struct stat statbuf;
 
@@ -305,6 +309,10 @@ nm_session_monitor_init (NMSessionMonitor *self)
 	GError *error = NULL;
 	GFile *file;
 
+#if NO_CONSOLEKIT
+	return;
+#endif
+
 	/* Sessions-by-user is responsible for destroying the Session objects */
 	self->sessions_by_user = g_hash_table_new_full (g_str_hash, g_str_equal,
 	                                                NULL, (GDestroyNotify) session_free);
@@ -384,6 +392,50 @@ nm_session_monitor_get (void)
 
 /* ---------------------------------------------------------------------------------------------------- */
 
+#if NO_CONSOLEKIT
+static gboolean
+uid_to_user (uid_t uid, const char **out_user, GError **error)
+{
+	struct passwd *pw;
+
+	pw = getpwuid (uid);
+	if (!pw) {
+		g_set_error (error,
+			         NM_SESSION_MONITOR_ERROR,
+			         NM_SESSION_MONITOR_ERROR_UNKNOWN_USER,
+			         "Could not get username for UID %d",
+			         uid);
+		return FALSE;
+	}
+
+	/* Ugly, but hey, use ConsoleKit */
+	if (out_user)
+		*out_user = pw->pw_name;
+	return TRUE;
+}
+
+static gboolean
+user_to_uid (const char *user, uid_t *out_uid, GError **error)
+{
+	struct passwd *pw;
+
+	pw = getpwnam (user);
+	if (!pw) {
+		g_set_error (error,
+			         NM_SESSION_MONITOR_ERROR,
+			         NM_SESSION_MONITOR_ERROR_UNKNOWN_USER,
+			         "Could not get UID for username '%s'",
+			         user);
+		return FALSE;
+	}
+
+	/* Ugly, but hey, use ConsoleKit */
+	if (out_uid)
+		*out_uid = pw->pw_uid;
+	return TRUE;
+}
+#endif
+
 /**
  * nm_session_monitor_user_has_session:
  * @monitor: A #NMSessionMonitor.
@@ -403,6 +455,12 @@ nm_session_monitor_user_has_session (NMSessionMonitor *monitor,
 {
 	Session *s;
 
+#if NO_CONSOLEKIT
+	if (!user_to_uid (username, out_uid, error))
+		return FALSE;
+	return TRUE;
+#endif
+
 	if (!ensure_database (monitor, error))
 		return FALSE;
 
@@ -440,6 +498,12 @@ nm_session_monitor_uid_has_session (NMSessionMonitor *monitor,
 {
 	Session *s;
 
+#if NO_CONSOLEKIT
+	if (!uid_to_user (uid, out_user, error))
+		return FALSE;
+	return TRUE;
+#endif
+
 	if (!ensure_database (monitor, error))
 		return FALSE;
 
@@ -476,6 +540,10 @@ nm_session_monitor_user_active (NMSessionMonitor *monitor,
 {
 	Session *s;
 
+#if NO_CONSOLEKIT
+	return TRUE;
+#endif
+
 	if (!ensure_database (monitor, error))
 		return FALSE;
 
@@ -510,6 +578,10 @@ nm_session_monitor_uid_active (NMSessionMonitor *monitor,
 {
 	Session *s;
 
+#if NO_CONSOLEKIT
+	return TRUE;
+#endif
+
 	if (!ensure_database (monitor, error))
 		return FALSE;