未加星标

Retrieve the default value with grep -e?

字体大小 | |
[系统(linux) 所属分类 系统(linux) | 发布者 店小二05 | 时间 2018 | 作者 红领巾 ] 0人收藏点击收藏

I am parsing text files looking for specific entries like so

grep -e 'Model' -e 'Manufacturer' -e 'Man Date' -e 'SW Version' -e' SW Name' -e 'HW Version' -e 'Receiver ID' JGMDTV356.HDD

This gives me an output like so

Model = HR24 Manufacturer = 100 Man Date = 04/14/2010 SW Version = 4D1 HW Version = 2.3 Receiver ID = 035635905389 Model = WDCWD5000AVVS-63M8B0 (Dragonfly-0)

The problem is that some files do not have the same number of fields. How can I do something like this?

Model = HR24 Manufacturer = 100 Man Date = N/A SW Version = 4D1 HW Version = N/A Receiver ID = N/A Model = N/A

Could this be done?

As Matthew mentioned, what you are trying to do is beyond the intended use of grep. Awk was made for this type of thing and is available on most linux distros (gawk is the GNU implementation) and even many embedded Linux systems. There is a good tutorial for it here that will take under an hour and teach you pretty much all you need to know.

Here is the awk code you will need to solve your problem:

#!/bin/awk -f BEGIN { tokens["Model"] = 0 tokens["Manufacturer"] = 0 tokens["Man Date"] = 0 tokens["SW Version"] = 0 tokens["HW Version"] = 0 tokens["Receiver ID"] = 0 } { for (token in tokens){ if ($1 == token){ print $0; tokens[$1]++; } } } END { for (token in tokens){ if( tokens[token] == 0){ printf("%-13s = NA\n" , token) } } }

Save this to a tmp.awk and add execute permissions to tmp.awk.

cat <your file> | ./tmp.awk

This will print out what you want.

本文系统(linux)相关术语:linux系统 鸟哥的linux私房菜 linux命令大全 linux操作系统

代码区博客精选文章
分页:12
转载请注明
本文标题:Retrieve the default value with grep -e&amp;quest;
本站链接:https://www.codesec.net/view/610755.html


1.凡CodeSecTeam转载的文章,均出自其它媒体或其他官网介绍,目的在于传递更多的信息,并不代表本站赞同其观点和其真实性负责;
2.转载的文章仅代表原创作者观点,与本站无关。其原创性以及文中陈述文字和内容未经本站证实,本站对该文以及其中全部或者部分内容、文字的真实性、完整性、及时性,不作出任何保证或承若;
3.如本站转载稿涉及版权等问题,请作者及时联系本站,我们会及时处理。
登录后可拥有收藏文章、关注作者等权限...
技术大类 技术大类 | 系统(linux) | 评论(0) | 阅读(56)