在 ( ) sed 之间打印文本 [英] Print text between ( ) sed

问题描述

这是我之前的问题的延伸.在那个问题中，我需要检索括号之间的文本，其中所有文本都在一行上.现在我有这个案例:

This is an extension of my previous question. In that question, I needed to retrieve the text between parentheses where all the text was on a single line. Now I have this case:

(aop)
(abc
d)

这一次，左括号可以在一行，右括号在另一行，所以:

This time, the open parenthesis can be on one line and the close parenthesis on another line, so:

(abc
d)

也算作分隔符 '( )' 之间的文本，我需要将其打印为

also counts as text between the delimiters '( )' and I need to print it as

abc
d

针对我的问题可能引起的混淆，让我澄清一下.基本上，我需要在可能跨越多行的分隔符之间打印文本.

In response to possible confusions of my question, let me clarify a little. Basically, I need to print text between delimiters which could span multiple lines.

例如，我的文件中有此文本:

for example I have this text in my file:

randomtext(1234
567) randomtext
randomtext(abc)randomtext

现在我想让 Sed 挑选出分隔符("和)"之间的文本.所以输出将是:

Now I want Sed to pick out text between the delimiter "(" and ")". So the output would be:

1234
567
abc

请注意，左右括号不在同一行上，但它们仍算作 1234 567 的分隔符，因此我需要打印该部分文本.(注意，我只想要第一对分隔符之间的文本).

Notice that the left and right brackets are not on the same line but they still count as a delimiter for 1234 567, so I need to print that part of the text. (note, I only want the text between the first pair of delimiters).

任何帮助将不胜感激.

推荐答案

啊！另一个棘手的 sed 难题 :)

Ah! another tricky sed puzzle :)

我相信这段代码可以解决您的问题:

I believe this code will work for your problem:

sed -n '/(/,/)/{:a; $!N; /)/!{$!ba}; s/.*(\([^)]*\)).*/\1/p}' file

输出

对于它提供的输入:

OUTPUT

For the provided input it produced:

1234
567
abc

说明:

• -n 抑制常规 sed 输出
• /(/,/)/ 用于(和)
之间的范围选择
• :a 用于标记标签 a
• $!N 表示将输入的下一行追加到当前模式空间中
• /)/! 表示如果 ) 在当前模式空间中不匹配，则执行某些操作
• /)/!${!ba} 表示如果 ) 在当前模式空间中不匹配，则转到标签 a
• s/.*(\([^)]*\)).*/\1/ 表示替换(和)之间的内容 只是内容，从而去掉括号
• \1 用于第 1 组的反向引用，即 \( 和 \)
之间的文本
• p 用于打印替换内容

• -n suppresses the regular sed output
• /(/,/)/ is for range selection between ( and )
• :a is for marking a label a
• $!N means append the next line of input into the current pattern space
• /)/! means do some actions if ) is not matched in current pattern space
• /)/!${!ba} means go to label a if ) is not matched in current pattern space
• s/.*(\([^)]*\)).*/\1/ means replace content between ( and ) by just the content thus stripping out parenthesis
• \1 is for back reference of group 1 i.e. text between \( and \)
• p is for printing the replaced content

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