運行自己用python寫的dbus服務時,出現如下錯誤:

Traceback (most recent call last):  File "./test.py", line 87, in <module>    object = DeviceObject()  File "./test.py", line 37, in __init__    bus_name = dbus.service.BusName(Bus_Name,bus=dbus.SystemBus())  File "/usr/lib/python2.7/dist-packages/dbus/service.py", line 131, in __new__    retval = bus.request_name(name, name_flags)  File "/usr/lib/python2.7/dist-packages/dbus/bus.py", line 303, in request_name    'su', (name, flags))  File "/usr/lib/python2.7/dist-packages/dbus/connection.py", line 651, in call_blocking    message, timeout)dbus.exceptions.DBusException: org.freedesktop.DBus.Error.accessDenied: Connection ":1.92" is not allowed to own the service "com.foxbryant.demo" due to security policies in the configuration file
解決方法:
在/etc/dbus-1/system.d/目錄下創建com.foxbryant.demo.conf (名稱隨意,以.conf結尾即可) 內容如下:
<!DOCTYPE busconfig PUBLIC "-//freedesktop//DTD D-BUS Bus Configuration 1.0//EN" "http://www.freedesktop.org/standards/dbus/1.0/busconfig.dtd"><busconfig>  <!-- Only root and devel can own the service -->  <policy user="root">    <allow own="com.foxbryant.demo"/>    <allow send_destination="com.foxbryant.demo"/>    <allow send_interface="com.foxbryant.demo"/>  </policy>  <policy user="foxbryant">    <allow own="com.foxbryant.demo"/>    <allow send_destination="com.foxbryant.demo"/>    <allow send_interface="com.foxbryant.demo"/>  </policy></busconfig>