正则表达式匹配括号 [英] Ansible regexp match parenthesis

问题描述

我需要匹配字符串 NAME ALL =(ALL)NOPASSWD:ALL 但是，我被括号所卡住了.

I need to match a string NAME ALL=(ALL) NOPASSWD: ALL However I'm getting stuck with the parenthesis.

我使用一个网站来帮助我构建该表达式，但无法弄清楚.到目前为止，我得到了: \ sNAME \ sALL = \(ALL \)\ s \ s \ s \ s \ s \ s \ s \ sNOPASSWD:\ sALL 但是，这没有得到括号的迹象...另外，我使用了大量的 \ s ，我敢肯定有更好的方法吗?

I used a website to help me build the expression but am unable to figure it out. Thusfar I got: \sNAME\sALL=\(ALL\)\s\s\s\s\s\s\sNOPASSWD:\sALL However that doesn't get the parenthesis signs... Also I use a ton of \s, which I'm sure there is a better way for?

我正在使用Ansible Lineinfile模块删除该行.感谢所有帮助，谢谢！

I'm using the Ansible Lineinfile module to remove the line. All help is appreciated, thank you!

以防万一，我添加的小剧本可能是我在那儿做错了:

Just in case, my little playbook added, might be that I do something wrong there:

嗨.

是的，它在所有这些生成器中都匹配，但是由于某种原因，我无法使其在我的剧本中正常工作，我是白痴还是?

Yeah it matches in all those generators, but for whatever reason I can't get it working in my playbook, am I such an idiot or?

- hosts: all
  become: true
  tasks:
  - name: Remove user
    lineinfile:
      dest: /etc/sudoers
      regexp: '^.*NAME.*$'
      state: 'absent'

推荐答案

• 您需要使用 \ ;
转义(和)
• 字符串中的空格与正则表达式中的空格匹配；
• 您可以在 ^ 和 $ (或仅其中之一)之间编写表达式，以确保其仅与确切的行(而不是注释掉的行)匹配，例如).
• You need to escape ( and ) with \;
• a space in the string is matched by a space in the regular expression;
• you can write the expression between ^ and $ (or just one of them) to be sure it matches only the exact line (not a commented-out line, for example).

要匹配问题中的确切行:

To match the exact line from the question:

regexp: '^NAME ALL=\(ALL\)       NOPASSWD: ALL$'

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您还可以将 \ s 与乘数配合使用，以匹配随机长度的空格，例如，在 NOPASSWD 字符串之前:

---

You can also use \s with a multiplier to match a random-length whitespace, for example before NOPASSWD string:

regexp: '^NAME ALL=\(ALL\)\s*NOPASSWD: ALL$'

---

但是

您正在尝试修改/etc/sudoers ―花费一些时间阅读编辑是否安全?/etc/sudoers和Ansible的"lineinfile"，尤其是此答案.

---

BUT

You are trying to modify /etc/sudoers ― take some time to read Is it safe to edit /etc/sudoers with the Ansible "lineinfile" module? and particularly this answer.

这篇关于正则表达式匹配括号的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！