两个图案之间提取线从文件 [英] Extract lines between two patterns from a file

问题描述

我需要从一个巨大的文件中提取两个匹配模式之间的特定线路。

I need to extract particular lines between two matching patterns from a huge file.

比方说，样式1 （在文件中是唯一的）相匹配的特定行＃N 和 PATTERN2 （而不是在文件中是唯一的）匹配行＃m的旁边立即赛后行＃N 。然后我想提取所有线之间并包括行＃N至＃M

Let's say pattern1 (unique in a file) matches a particular line # n and pattern2 (not unique in a file) matches line # m next immediate match after line # n. Then I want to extract all lines between and including line #n to #m

示例文件的内容

***************************************************************************
text line # n-2
text line # n-1
********************************* Results *********************************
SUCCEEDED
...
...
some text
***************************************************************************
text line # m+1
text line # m+2
***************************************************************************

所需的输出

********************************* Results *********************************
SUCCEEDED
...
...
some text
***************************************************************************

这将是AP preciated如果你能帮助我解决这个问题。

It would be appreciated if you could help me solve this problem

推荐答案

这可能是一种方法：

$ awk '/pattern1/ {p=1}; p; /pattern2/ {p=0}' file
********************************* Results *********************************
SUCCEEDED
...
...
some text
***************************************************************************

• 当它找到样式1 ，然后进行变量p = 1。


• 它只是打印线条时点== 1 。这与 P 的条件来完成。如果这是真的，它执行默认的awk动作，即打印$ 1,0 。否则，它没有。


• 当它找到 PATTERN2 ，然后进行变量p = 0。由于这种情况后， P 检查情况，将打印在 PATTERN2 出现的第一次就行了。


• When it finds pattern1, then makes variable p=1.
• it just prints lines when p==1. This is accomplished with the p condition. If it is true, it performs the default awk action, that is, print $0. Otherwise, it does not.
• When it finds pattern2, then makes variable p=0. As this condition is checked after p condition, it will print the line in which pattern2 appears for the first time.

如果您想要线的精确匹配：

If you want an exact match of the lines:

$ awk '$0=="pattern1" {p=1}; p; $0=="pattern2" {p=0}' file

测试

$ cat a
***************************************************************************
text line # n-2
pattern1
********************************* Results *********************************
SUCCEEDED
...
...
some text
***************************************************************************
pattern2
text line # m+2
pattern2
***************************************************************************
$ awk '/pattern1/ {p=1}; p; /pattern2/ {p=0}' a
pattern1
********************************* Results *********************************
SUCCEEDED
...
...
some text
***************************************************************************
pattern2

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