我正在制作一个简单的python程序来安装和卸载闪存驱动器，这样我就不必只做一个列表并选择我想要安装的内容。现在，我有一个每个设备的对象和属性列表。我想知道的是，我应该查看哪些属性来判断设备是否为usb大容量存储设备。我的第一直觉是看'可拆卸'，但我只有一个设备插入（我的kindle）但我有两个可拆卸的设备。我注意到的两个属性不同，/ dev / sdb有一个空白的'IdLabel'和'IdUsage'。这是我现在的代码：
#!/usr/bin/python
import dbus
def get_devices():
bus = dbus.SystemBus()
ud_manager_obj = bus.get_object('org.freedesktop.UDisks',
'/org/freedesktop/UDisks')
ud_manager = dbus.Interface(ud_manager_obj, 'org.freedesktop.UDisks')
proplist = []
for device in ud_manager.EnumerateDevices():
device_obj = bus.get_object('org.freedesktop.UDisks', device)
device_props = dbus.Interface(device_obj, dbus.PROPERTIES_IFACE)
proplist.append(device_props.GetAll('org.freedesktop.UDisks.Device'))
for device_props in proplist:
print '----------'
print device_props['IdLabel']
print device_props['DeviceFile']
print device_props['IdUsage']
if device_props['DriveCanDetach']:
print 'Device is detachable'
else:
print 'Device is not detachable'
get_devices()
我正在谈论的两个输出是：
Kindle
/dev/sdb1
filesystem
Device is detachable
----------
/dev/sdb
Device is detachable
udisks的结果--show-info / dev / sdb1
Showing information for /org/freedesktop/UDisks/devices/sdb1
native-path: /sys/devices/pci0000:00/0000:00:1c.3/0000:04:00.0/usb3/3-1/3
-1:1.0/host7/target7:0:0/7:0:0:0/block/sdb/sdb1
device: 8:17
device-file: /dev/sdb1
presentation: /dev/sdb1
by-id: /dev/disk/by-id/usb-Kindle_Internal_Storage_90D42204345600JR
-0:0-part1
by-id: /dev/disk/by-uuid/386D-5422
by-path: /dev/disk/by-path/pci-0000:04:00.0-usb-0:1:1.0-scsi-0:0:0:0-
part1
detected at: Sat 04 Jan 2014 03:56:35 PM EST
system internal: 0
removable: 0
has media: 1 (detected at Sat 04 Jan 2014 03:56:35 PM EST)
detects change: 0
detection by polling: 0
detection inhibitable: 0
detection inhibited: 0
is read only: 0
is mounted: 0
mount paths:
mounted by uid: 0
presentation hide: 0
presentation nopolicy: 0
presentation name:
presentation icon: multimedia-player
automount hint:
size: 1432346624
block size: 512
job underway: no
usage: filesystem
type: vfat
version: FAT32
uuid: 386D-5422
label: Kindle
partition:
part of: /org/freedesktop/UDisks/devices/sdb
scheme: mbr
number: 1
type: 0x0b
flags:
offset: 8192
alignment offset: 0
size: 1432346624
label:
uuid:
udisks的结果--show-info / dev / sdb
Showing information for /org/freedesktop/UDisks/devices/sdb
native-path: /sys/devices/pci0000:00/0000:00:1c.3/0000:04:00.0/usb3/3-1/3
-1:1.0/host7/target7:0:0/7:0:0:0/block/sdb
device: 8:16
device-file: /dev/sdb
presentation: /dev/sdb
by-id: /dev/disk/by-id/usb-Kindle_Internal_Storage_90D42204345600JR
-0:0
by-path: /dev/disk/by-path/pci-0000:04:00.0-usb-0:1:1.0-scsi-0:0:0:0
detected at: Sat 04 Jan 2014 03:56:34 PM EST
system internal: 0
removable: 1
has media: 1 (detected at Sat 04 Jan 2014 03:56:34 PM EST)
detects change: 1
detection by polling: 1
detection inhibitable: 1
detection inhibited: 0
is read only: 0
is mounted: 0
mount paths:
mounted by uid: 0
presentation hide: 0
presentation nopolicy: 0
presentation name:
presentation icon: multimedia-player
automount hint:
size: 1432354816
block size: 512
job underway: no
usage:
type:
version:
uuid:
label:
partition table:
scheme: mbr
count: 1
drive:
vendor: Kindle
model: Internal Storage
revision: 0100
serial: 90D42204345600JR
WWN:
detachable: 1
can spindown: 0
rotational media: Yes, unknown rate
write-cache: unknown
ejectable: 0
adapter: Unknown
ports:
similar devices:
media:
compat:
interface: usb
if speed: 480000000 bits/s
ATA SMART: not available
所以我想知道，如果确定有IdLabel和IdUsage足以假设某些东西是USB大容量存储设备。
答案 0 :(得分：2)
如果你可以使用UDisks2 DBus接口，答案很简单:-) 首先，似乎UDisks2（可能是UDisks1，但我没有安装）只处理通过USB连接的大容量存储设备，完全忽略USB连接的MTP设备和其他类型的USB设备，如打印机和鼠标。看看：
现在我连接了6个USB设备：
alex@galene ~ $ /usr/sbin/lsusb | grep -v 'root hub' Bus 001 Device 004: ID 058f:6362 Alcor Micro Corp. Flash Card Reader/Writer Bus 001 Device 003: ID 09da:000a A4 Tech Co., Ltd Optical Mouse Opto 510D Bus 008 Device 090: ID 04e8:6860 Samsung Electronics Co., Ltd GT-I9100 Phone [Galaxy S II], GT-P7500 [Galaxy Tab 10.1] Bus 008 Device 075: ID 04b8:0007 Seiko Epson Corp. Printer Bus 009 Device 002: ID 058f:6387 Alcor Micro Corp. Flash Drive Bus 009 Device 088: ID 1058:1010 Western Digital Technologies, Inc. Elements External HDD
058f：6362是一款“多合一”读卡器，带有当前插入的SD卡。 058f：6387和1058：1010分别是真正的USB大容量存储设备，闪存和外部硬盘。 04e8：6860是三星Galaxy Note1（MTP设备），其余是鼠标和打印机。
我还有一个内部SATA驱动器。
这是当前的udisksctl status输出（因为您可能会看到缺少Galaxy Note）：
MODEL REVISION SERIAL DEVICE -------------------------------------------------------------------------- Hitachi HDT725040VLA360 V5COA7EA VFM301R3196R5F sda Generic Flash Disk 8.07 8D0147DF sdb WDC WD1200BEVS-22RST0 04.01G04 WD-WXE108V72690 sdc Generic USB CF Reader 1.01 058F312D81B sde Generic USB SM Reader 1.02 058F312D81B sdf Generic USB MS Reader 1.03 058F312D81B sdg Generic USB SD Reader 1.00 058F312D81B sdd
要将可插拔USB大容量存储设备与固定驱动器区分开，可以检查 'ConnectedBus'和''可移动'属性。请注意，还有另一个属性“MediaRemovable”，它对应于设备的物理介质。这是选择可移动USB海量存储设备并打印其“MediaRemovable”属性
的脚本alex@galene ~ $ cat <<EOF | python -
> import dbus
> bus = dbus.SystemBus()
> ud_manager_obj = bus.get_object('org.freedesktop.UDisks2', '/org/freedesktop/UDisks2')
> om = dbus.Interface(ud_manager_obj, 'org.freedesktop.DBus.ObjectManager')
> for k,v in om.GetManagedObjects().iteritems():
> drive_info = v.get('org.freedesktop.UDisks2.Drive', {})
> if drive_info.get('ConnectionBus') == 'usb' and drive_info.get('Removable'):
> print("Device Path: %s, MediaRemovable: %s" % (k, drive_info['MediaRemovable']))
> block_devices = [''.join(chr(c) for c in device[dbus.String(u'org.freedesktop.UDisks2.Block')][dbus.String(u'PreferredDevice')] if chr(c) != '\x00' ) for device in om.GetManagerObjects().values() if dbus.String(u'org.freedesktop.UDisks2.Block') in device]
> EOF
Device Path: /org/freedesktop/UDisks2/drives/Generic_USB_SM_Reader_058F312D81B, MediaRemovable: 1
Device Path: /org/freedesktop/UDisks2/drives/Generic_Flash_Disk_8D0147DF, MediaRemovable: 1
Device Path: /org/freedesktop/UDisks2/drives/Generic_USB_SD_Reader_058F312D81B, MediaRemovable: 1
Device Path: /org/freedesktop/UDisks2/drives/WDC_WD1200BEVS_22RST0_WD_WXE108V72690, MediaRemovable: 0
Device Path: /org/freedesktop/UDisks2/drives/Generic_USB_CF_Reader_058F312D81B, MediaRemovable: 1
Device Path: /org/freedesktop/UDisks2/drives/Generic_USB_MS_Reader_058F312D81B, MediaRemovable: 1
基本上它解决了你想要解决的问题。谣言说有不可移动的USB连接存储设备，但我还没有见过。