greping 或过滤 linux 中的 ruby 输出以获取自定义事实

greping or filtering linux output in ruby for custom fact

我是 ruby 的初学者,我一直在为这个而烦恼: 我需要“将 ethtool 输出分成不同的变量,

这是我所做的:

[root@aptpka02 facter]# cat test.rb
interface = "enp8s0,enp9s0,enp1s0f0,enp1s0f1d1"
interface.split(',').each do |int|
 # call ethtool to get the driver for this NIC
  puts int
  ifline = %x{/sbin/ethtool -i #{int} 2>/dev/null }
  puts ifline

end

这是输出(仅针对一个接口):

enp1s0f1d1
driver: sfc
version: 4.0
firmware-version: 4.2.2.1003 rx1 tx1
bus-info: 0000:01:00.1
supports-statistics: yes
supports-test: yes
supports-eeprom-access: no
supports-register-dump: yes
supports-priv-flags: no

我只需要驱动程序和固件信息,我尝试将带有 "or" 的 grep 添加到命令执行中,如下所示:

interface.split(',').each do |int|
# call ethtool to get the driver for this NIC
puts int
ifline = %x{/sbin/ethtool -i #{int} 2>/dev/null | grep "driver\| firmware"}
puts ifline

end

但是它不起作用,它打印一个空行。

最后,我想做的是:

[root@aptpka02 facter]# vim test.rb
interface = "enp8s0,enp9s0,enp1s0f0,enp1s0f1d1"
interface.split(',').each do |int|
 # call ethtool to get the driver for this NIC
puts int
ifline = %x{/sbin/ethtool -i #{int} 2>/dev/null | grep "driver\| firmware"}.lines.each do | nicinfo|
 if (nicinfo = driver)
   driver = %x{/sbin/ethtool -i #{int} 2>/dev/null | grep 'driver: '}.chomp.sub("driver: ", "")
 else
  .
  .
  .
 endif

end

你能给我一个如何继续的提示吗?

在此先感谢您的帮助!

String#scan 在这种情况下很方便。假设您的示例数据位于名为 data:

的字符串中
data.scan(/(firmware-version: |driver: )(.+)/)

这输出一个数组:

=> [["driver: ", "sfc"], ["firmware-version: ", "4.2.2.1003 rx1 tx1"]]
ifdata = ifline
  .lines                                       # array of \n-terminated lines
  .map { |line| line.chomp.split(': ', 2) }    # array of [key, value] pairs
  .select { |line| line.length > 1 }           # get rid of anomalous "enp1s0f1d1"
  .to_h                                        # hashify

ifdata['driver']
# => sfc
ifdata['firmware-version']
# => 4.2.2.1003 rx1 tx1