Bash在两个字符串之间打印文件内容

我想打印

start

和

start

后面的第一个

end

之间的内容（

start

始终是唯一的）。我还想在打印文本的行之间进行打印，在本例中，在第4行和第7行之间

我尝试了

grep

和

cat

，但做不了多少

我试过：

a
b
s
start
text
more text
end
even more text
end

---

将shell变量传递到

awk

，然后按范围打印文本，然后重试，在

start

awk的

variable中提到您的shell变量，然后我们就可以了。（同时将
$0~start
更改为
$0~“^”start“$”
，以防您要查找行中的起始值的精确匹配。）

OP样本的样本输出：

简单解释：按范围打印行
开始
直到
结束
在此语句之间检查条件如果行有结束字符串，则从输入_文件中出来，我们不需要读取完整的输入_文件，因为OP只需要打印第一组行。
示例数据：

start
text
more text
end
The content is between lines 4 and 7

一个
awk
解决方案，使用一个范围（类似于RavinderSingh13的帖子），在结尾打印OP的文本消息：

$ cat -n strings.dat
 1  a
 2  b
 3  s
 4  start
 5  text
 6  more text
 7  end of more text
 8  end
 9  even more text
10  end

注意：
$0==ss
和
/^end$/
测试假定数据文件中没有前导/尾随空格，否则这些测试将失败，并且没有范围匹配

使用
startstring=“start”
这将生成：

startstring="start"                            # define start of search block

awk -v ss="${startstring}" '                   # pass start of search block in as awk variable "ss"

# search for a range of lines between "ss" and "end":

$0==ss,/^end$/ { if ($0==ss && x==0 ) x=FNR    # if this is the first line of the range make note of the line number
                 print                         # print the current line of the range
                 if ($0=="end")                # if this is the last line of the range then print our textual message re: start/finish line numbers
                    printf "\nThe content is between lines %d and %d.\n",x,FNR
               }
' strings.dat

start
text
more text
end of more text
end

The content is between lines 4 and 8.

more text
end of more text
end

The content is between lines 6 and 8.

even more text
end

The content is between lines 9 and 10.

使用
startstring=“more text”
这将生成：

startstring="start"                            # define start of search block

awk -v ss="${startstring}" '                   # pass start of search block in as awk variable "ss"

# search for a range of lines between "ss" and "end":

$0==ss,/^end$/ { if ($0==ss && x==0 ) x=FNR    # if this is the first line of the range make note of the line number
                 print                         # print the current line of the range
                 if ($0=="end")                # if this is the last line of the range then print our textual message re: start/finish line numbers
                    printf "\nThe content is between lines %d and %d.\n",x,FNR
               }
' strings.dat

start
text
more text
end of more text
end

The content is between lines 4 and 8.

more text
end of more text
end

The content is between lines 6 and 8.

even more text
end

The content is between lines 9 and 10.

使用
startstring=“甚至更多文本”
将生成：

startstring="start"                            # define start of search block

awk -v ss="${startstring}" '                   # pass start of search block in as awk variable "ss"

# search for a range of lines between "ss" and "end":

$0==ss,/^end$/ { if ($0==ss && x==0 ) x=FNR    # if this is the first line of the range make note of the line number
                 print                         # print the current line of the range
                 if ($0=="end")                # if this is the last line of the range then print our textual message re: start/finish line numbers
                    printf "\nThe content is between lines %d and %d.\n",x,FNR
               }
' strings.dat

start
text
more text
end of more text
end

The content is between lines 4 and 8.

more text
end of more text
end

The content is between lines 6 and 8.

even more text
end

The content is between lines 9 and 10.

通过
startstring=“water”
这将生成：

startstring="start"                            # define start of search block

awk -v ss="${startstring}" '                   # pass start of search block in as awk variable "ss"

# search for a range of lines between "ss" and "end":

$0==ss,/^end$/ { if ($0==ss && x==0 ) x=FNR    # if this is the first line of the range make note of the line number
                 print                         # print the current line of the range
                 if ($0=="end")                # if this is the last line of the range then print our textual message re: start/finish line numbers
                    printf "\nThe content is between lines %d and %d.\n",x,FNR
               }
' strings.dat

start
text
more text
end of more text
end

The content is between lines 4 and 8.

more text
end of more text
end

The content is between lines 6 and 8.

even more text
end

The content is between lines 9 and 10.

注意：如果OP使用
startstring=“end”
结果与预期不符；虽然可以添加更多代码来解决此方案，但我暂时跳过此方案。
请在您的问题中添加您的努力，这是非常鼓励的，谢谢。您想在输出中打印行和行号吗？请使用代码格式块中的预期输出更新问题；如果你打算使用出口，你也可以在发出出口之前打印摘要，这样就不需要使用结束块了；谢谢，这对我不起作用。我应该补充一点，文件中可能有空白，文件是.cpp，如果这很重要，您必须详细说明
对我不起作用
；文件名/扩展名不重要，重要的是文件的内容，我们需要对所述文件内容进行准确描述（即，用更多细节更新问题）。我认为它会一直读到文件的末尾，而不会停在“结束”处。它从正确的位置开始。@GeoCap，如果您的行与
end
完全相同（此处不考虑行尾、行首或任何其他单词的空格），则它将打印第一组匹配值。假设开始变量是
bla
，那么它应该打印从
bla
到
end
（第一次出现）的值，然后从文件中出来，如果有任何查询或它在哪里不起作用，请务必让我知道。对于我来说，带有变量的示例打印从变量开始的文件和整个文件（不停在“end”）。没有变量的示例在“end”处停止，测试了同一个文件。哦，是的，我有空行，抱歉，现在它可以工作了，谢谢！是的，我感谢您的帮助，因为我的问题解决了一半，我仍然希望打印提取内容的行数。