[英]USB devices UDev and D-BUS
I am trying to get a list of currently plugged in USB devices in Ubuntu 10.10 and monitor changes that happen, like devices being plugged in or out using UDev and D-BUS. 我正在尝试获取Ubuntu 10.10中当前插入的USB设备的列表,并监视发生的变化,例如使用UDev和D-BUS插入或拔出的设备。 I'm fairly new to programming using D-BUS. 我是使用D-BUS进行编程的新手。 I saw one example: Linux : How to detect is usb keyboard is plugged and unplugged only that one uses HAL and I know that HAL is deprecated. 我看到一个例子: Linux:如何检测usb键盘是插入和拔出只有一个人使用HAL我知道HAL已被弃用。 I found some working code, modified it a bit, only it doesn't work for any device only storage devices such as usb sticks, media players or cd-rom devices. 我找到了一些工作代码,对它进行了一些修改,只是它不适用于任何设备,只有存储设备,如usb棒,媒体播放器或cd-rom设备。 I want the whole thing mice, keyboards, usb cameras chargers anything that is plugged in to the USB I want my program to know about it. 我希望老鼠,键盘,usb相机充电器充满任何插入USB的东西我希望我的程序知道它。 This is basically what I have ( http://moserei.de/2010/01/08/accessing-devicekit-with-dbus-and-python.html ): 这基本上就是我所拥有的( http://moserei.de/2010/01/08/accessing-devicekit-with-dbus-and-python.html ):
import dbus
import gobject
from dbus.mainloop.glib import DBusGMainLoop
def device_added_callback(device):
print 'Device %s was added' % (device)
def device_changed_callback(device):
print 'Device %s was changed' % (device)
#must be done before connecting to DBus
DBusGMainLoop(set_as_default=True)
bus = dbus.SystemBus()
proxy = bus.get_object("org.freedesktop.UDisks",
"/org/freedesktop/UDisks")
iface = dbus.Interface(proxy, "org.freedesktop.UDisks.Device")
devices = iface.get_dbus_method('EnumerateDevices')()
print '%s' % (devices)
#addes two signal listeners
iface.connect_to_signal('DeviceAdded', device_added_callback)
iface.connect_to_signal('DeviceChanged', device_changed_callback)
#start the main loop
mainloop = gobject.MainLoop()
mainloop.run()
Any help would be apreciated. 任何帮助都会被贬低。 Thank you in advance, Calota Romeo 先谢谢你,Calota Romeo
The udisks D-Bus service, obviously, only reports disks. 显然, udisks D-Bus服务仅报告磁盘。
Just monitor udev directly (through libudev, through pyudev ). 只需直接监控udev(通过libudev,通过pyudev )。
import pyudev
context = pyudev.Context()
monitor = pyudev.Monitor.from_netlink(context)
observer = pyudev.pygtk.GUDevMonitorObserver(monitor)
observer.connect('device-added', device_added_callback)
observer.connect('device-changed', device_changed_callback)
monitor.enable_receiving()
mainloop = gobject.MainLoop()
mainloop.run()
This is what I use to list already plugged flash sticks. 这是我用来列出已插入的闪光棒。 You can modify script to your needs 您可以根据需要修改脚本
import dbus
bus = dbus.SystemBus()
proxy = bus.get_object("org.freedesktop.Hal", "/org/freedesktop/Hal/Manager")
iface = dbus.Interface(proxy, "org.freedesktop.Hal.Manager")
devices = iface.GetAllDevices ()
for device in devices:
try:
proxy1 = bus.get_object("org.freedesktop.Hal", device)
iface1 = dbus.Interface(proxy1, "org.freedesktop.Hal.Device")
props = iface1.GetAllProperties()
removable = iface1.GetProperty("storage.removable")
usb = iface1.GetProperty("storage.bus")
if usb== "usb":
print "\n".join(("%s: %s" % (k, props[k]) for k in props)) # shows available properties
except:
pass
And this is what I use to see if any usb plugged : 这就是我用来看看是否有任何USB插件:
#!/usr/bin/python
import dbus
import gobject
class DeviceAddedListener:
def __init__(self):
self.bus = dbus.SystemBus()
self.hal_manager_obj = self.bus.get_object("org.freedesktop.Hal", "/org/freedesktop/Hal/Manager")
self.hal_manager = dbus.Interface(self.hal_manager_obj,"org.freedesktop.Hal.Manager")
self.hal_manager.connect_to_signal("DeviceAdded", self._filter)
def _filter(self, udi):
device_obj = self.bus.get_object ("org.freedesktop.Hal", udi)
device = dbus.Interface(device_obj, "org.freedesktop.Hal.Device")
self.do_something(device)
def do_something(self, device):
try:
usb = device.GetProperty("storage.bus")
info = device.GetProperty("info.product")
removable = device.GetProperty("storage.removable")
print info
except:
pass#blah blah
if __name__ == '__main__':
from dbus.mainloop.glib import DBusGMainLoop
DBusGMainLoop(set_as_default=True)
loop = gobject.MainLoop()
DeviceAddedListener()
loop.run()
Here is the example of UDisks : python udisks - enumerating device information 以下是UDisks的示例: python udisks - 枚举设备信息
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