现在,我使用 subprocess 来调用find
哪个可以很好地完成工作,但是我追求的是一种 Pythonic 的做事方式。
这是当前代码:
cmd = "find /sys/devices/pci* | grep '/net/' |grep address"
p = subprocess.Popen(cmd, stdout=subprocess.PIPE, shell=True)
在输出中,我收到以下列表:
[root@host1 ~]# find /sys/devices/pci* |grep '/net/'|grep 'address'
/sys/devices/pci0000:00/0000:00:07.0/0000:04:00.0/0000:05:00.0/0000:06:00.0/0000:07:00.0/0000:08:00.0/net/eth0/address
/sys/devices/pci0000:00/0000:00:07.0/0000:04:00.0/0000:05:00.0/0000:06:00.0/0000:07:01.0/0000:09:00.0/net/eth1/address
/sys/devices/pci0000:00/0000:00:07.0/0000:04:00.0/0000:05:00.0/0000:06:00.0/0000:07:02.0/0000:0a:00.0/net/rename4/address
/sys/devices/pci0000:00/0000:00:07.0/0000:04:00.0/0000:05:00.0/0000:06:00.0/0000:07:03.0/0000:0b:00.0/net/eth3/address
/sys/devices/pci0000:00/0000:00:07.0/0000:04:00.0/0000:05:00.0/0000:06:00.0/0000:07:04.0/0000:0c:00.0/net/eth4/address
/sys/devices/pci0000:00/0000:00:07.0/0000:04:00.0/0000:05:00.0/0000:06:00.0/0000:07:05.0/0000:0d:00.0/net/eth5/address
/sys/devices/pci0000:00/0000:00:07.0/0000:04:00.0/0000:05:00.0/0000:06:00.0/0000:07:06.0/0000:0e:00.0/net/eth6/address
/sys/devices/pci0000:00/0000:00:07.0/0000:04:00.0/0000:05:00.0/0000:06:00.0/0000:07:07.0/0000:0f:00.0/net/eth7/address
/sys/devices/pci0000:00/0000:00:07.0/0000:04:00.0/0000:05:00.0/0000:06:00.0/0000:07:08.0/0000:10:00.0/net/eth8/address
/sys/devices/pci0000:00/0000:00:07.0/0000:04:00.0/0000:05:00.0/0000:06:00.0/0000:07:09.0/0000:11:00.0/net/eth9/address
/sys/devices/pci0000:00/0000:00:07.0/0000:04:00.0/0000:05:00.0/0000:06:00.0/0000:07:0a.0/0000:12:00.0/net/eth10/address
/sys/devices/pci0000:00/0000:00:07.0/0000:04:00.0/0000:05:00.0/0000:06:00.0/0000:07:0b.0/0000:13:00.0/net/eth11/address
现在,如果我这样做了,glob.glob('/sys/devices/pci*/*/*/*/*/*/*/net/')
我确实会得到一个目录列表,我什至可以查找文件,但它肯定似乎需要更长的时间find
,即使通过子进程也是如此。而且结果集很大,我无法提前知道具体主机的架构是否会有相同的目录结构,所以不知道要输入多少个星号glob.glob()
。
我的问题是,我如何重复简单find | grep
命令实现的行为,或者,如果有更好的方法来查找主机拥有的所有 NIC 的所有 MAC,无论是否处于活动状态(我正在寻找特定的 MAC模式在这里)
编辑:不应该使用 glob,os.walk 似乎正在做这项工作:
>>> for root, dirs, names in os.walk('/sys/devices/'):
... if 'address' in names and 'pci' in root:
... f = open(str(root + '/address'), 'r')
... mac = f.readlines()[0].strip()
... f.close()
... print mac
... eth = root.split('/')[-1]
... print eth