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问题描述

我正在使用egrep查看perforce NAS中的脚本。



我正在试图找到我们使用RCP& RSH ....我遇到的问题是1)我在REGEX吸吮; 2)我正在拾取垃圾我不感兴趣,例如,如果一个文件有strcpy这个词,它会在RHS上选择RCP或所有权..



显然我对这些不感兴趣,但我不想根据所有权或strcpy排除行......因为它们可能会一起使用......并且它不是完整的列表。 p>

这是我的正则表达式

 'ftp | rcp | rsh'

如何修改这些命中FTP,但不是SFTP ... rcp,但没有strcpy,rsh,但没有所有权.....等等。



所以我想匹配的东西。

  ftp 
`ftp`
/ ftp /
PUNCTFTPPUNCT


解决方案

有几个元字符:
$ b


  • \ b 字界

  • \< 字开头

  • \> 字尾



,一个可能的正则表达式是: \<(ftp | rcp | rsh)\>


I am using egrep to look through scripts in our perforce NAS.

i am trying to find where we use RCP & RSH....The problem i have is that 1) I suck at REGEX; 2) i am picking up junk I am not interested in. For example if a file has the word strcpy..it picks up on RCP..or ownership..hits on RSH.

Obviously i am not interested in those, but I don't want to exclude lines based on the words ownership or strcpy...because they may be used in conjunction...and its not a complete list.

Here is my regex

 'ftp|rcp|rsh'

How can mod these to hit on FTP, but not SFTP...rcp but no strcpy, rsh but not ownership.....etc.?

So Things I would want to match.

ftp
`ftp`
/ftp/
"PUNCT"FTP"PUNCT"
解决方案

There are several metacharacters:

  • \b word boundary
  • \< word start
  • \> word end

So, one possible regex is: \<(ftp|rcp|rsh)\>

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08-15 01:20