我编写了一个通过 dbus 作为会话服务运行的程序。
如果由 root (uid 0) 执行,我想让它作为系统服务运行(创建 dbus.SystemBus 总线名称)。
我正在尝试为 dbus.SystemBus 运行我当前为 dbus.SessionBus 运行的内容,但出现策略错误。
代码(Python,但这并不重要),清除了所有不必要的内容,我运行的是这样的:
import gobject
import dbus
import dbus.service
from dbus.mainloop.glib import DBusGMainLoop
DBusGMainLoop(set_as_default=True)
loop = gobject.MainLoop()
class dbusService(dbus.service.Object):
def __init__(self):
bus_name = dbus.service.BusName('org.testobj.service', bus=dbus.SystemBus())
dbus.service.Object.__init__(self, bus_name, '/org/testobj/service')
a = dbusService()
并得到:
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "<stdin>", line 3, in __init__
File "/usr/lib/python2.7/site-packages/dbus/service.py", line 131, in __new__ retval = bus.request_name(name, name_flags)
File "/usr/lib/python2.7/site-packages/dbus/bus.py", line 303, in request_name 'su', (name, flags))
File "/usr/lib/python2.7/site-packages/dbus/connection.py", line 651, in call_blocking message, timeout)
dbus.exceptions.DBusException: org.freedesktop.DBus.Error.AccessDenied: Connection ":1.48" is not allowed to own the service "org.testobj.service" due to security policies in the configuration file
处理上面示例的最简单方法是编辑
/etc/dbus-1/system.conf
并添加以下行:
<policy context="default">
...
<allow own="org.testobj.service"/>
</policy>
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