From 5bc849fd06ca08687d22fb9ff846550ec3ff161b Mon Sep 17 00:00:00 2001
From: Lennart Poettering <lennart@poettering.net>
Date: Wed, 29 Jun 2011 19:53:27 +0200
Subject: [PATCH] logind: allow access to SetIdleHint() to owner of the session

---
 src/logind-session-dbus.c       | 8 ++++++++
 src/logind.h                    | 1 -
 src/org.freedesktop.login1.conf | 4 ++++
 3 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/src/logind-session-dbus.c b/src/logind-session-dbus.c
index 2435a651..0ef65588 100644
--- a/src/logind-session-dbus.c
+++ b/src/logind-session-dbus.c
@@ -302,6 +302,7 @@ static DBusHandlerResult session_message_dispatch(
 
         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Session", "SetIdleHint")) {
                 dbus_bool_t b;
+                unsigned long ul;
 
                 if (!dbus_message_get_args(
                                     message,
@@ -310,6 +311,13 @@ static DBusHandlerResult session_message_dispatch(
                                     DBUS_TYPE_INVALID))
                         return bus_send_error_reply(connection, message, &error, -EINVAL);
 
+                ul = dbus_bus_get_unix_user(connection, dbus_message_get_sender(message), &error);
+                if (ul == (unsigned long) -1)
+                        return bus_send_error_reply(connection, message, &error, -EIO);
+
+                if (ul != 0 && ul != s->user->uid)
+                        return bus_send_error_reply(connection, message, NULL, -EPERM);
+
                 session_set_idle_hint(s, b);
 
                 reply = dbus_message_new_method_return(message);
diff --git a/src/logind.h b/src/logind.h
index 7e47bc34..10b75273 100644
--- a/src/logind.h
+++ b/src/logind.h
@@ -36,7 +36,6 @@
  *
  * spawn user systemd
  * direct client API
- * verify access to SetIdleHint
  *
  * udev:
  * drop redundant udev_device_get_is_initialized() use as soon as libudev is fixed
diff --git a/src/org.freedesktop.login1.conf b/src/org.freedesktop.login1.conf
index dc6a01cb..c423ef59 100644
--- a/src/org.freedesktop.login1.conf
+++ b/src/org.freedesktop.login1.conf
@@ -76,6 +76,10 @@
                        send_interface="org.freedesktop.login1.Session"
                        send_member="Activate"/>
 
+                <allow send_destination="org.freedesktop.login1"
+                       send_interface="org.freedesktop.login1.Session"
+                       send_member="SetIdleHint"/>
+
                 <allow receive_sender="org.freedesktop.login1"/>
         </policy>
 
-- 
2.39.5