Question

现在，我使用子进程来调用find来完成工作，但我正在采用pythonic方式做事。

这是当前的代码：

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glob.glob('/sys/devices/pci*/*/*/*/*/*/*/net/')，我确实得到了一个目录列表，我甚至可以查找这些文件，但它确实需要比find更长的时间，即使是通过子进程也是如此。此外，结果集是巨大的，我无法知道特定主机的架构是否具有相同的目录结构，所以我不知道在glob.glob()中输入多少个星号。

我的问题是，如何重复简单find | grep命令实现的行为，或者，如果有更好的方法可以找到主机拥有的所有NIC的所有MAC，无论是否有效（我在这里寻找特定的MAC模式）

编辑：不应该使用glob，os.walk似乎正在做这个工作：

>>> 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

Answer 1

你检查过os.walk（）吗？

import os
for root, dirs, names in os.walk(path):
    ...

http://docs.python.org/library/os.html#os.walk

从上面的链接，这是一种跳过某些目录的方法：

import os
from os.path import join, getsize
for root, dirs, files in os.walk('python/Lib/email'):
    print root, "consumes",
    print sum(getsize(join(root, name)) for name in files),
    print "bytes in", len(files), "non-directory files"
    if 'CVS' in dirs:
        dirs.remove('CVS')  # don't visit CVS directories

python glob.glob - 如何查找特定文件（或文件列表）而不知道它在子目录中的深度？

1 个答案: