使用sed来匹配模式和从线中删除该文件的末尾 [英] Using sed to match a pattern and deleting from the line to the end of the file

问题描述

我试图匹配来自管道输入和/或文件的图案，然后从匹配线删除该文件，包容的末尾。我看着到处都是，但似乎无法找到一个前pression，将适合我的需要。

I'm trying to match a pattern from piped input and/or a file, and then remove from the matched lines to the end of the file, inclusive. I've looked everywhere, but can't seem to find an expression that would fit my needs.

下面前pression让我消除了流的开头，包括匹配模式：

The following expression allows me to remove to the beginning of the stream, including the matched pattern:

sed -e '1,/Files:/d'

由于一些样本数据：

Given some sample data:

Blah blah blah
Foobar foo foo
Files:
 somefiles.tar.gz 1 2 3
 somefiles.tar.gz 1 2 3

-----THIS STUFF IS USELESS-----
BLEH BLEH BLEH
BLEH BLEH BLEH

运行上面的前pression生产：

Running the above expression produces:

Files:
 somefiles.tar.gz 1 2 3
 somefiles.tar.gz 1 2 3

-----THIS STUFF IS USELESS-----
BLEH BLEH BLEH
BLEH BLEH BLEH

我想达到类似的效果，但在相反的方向。使用从previous前pression输出，我想从删除-----这东西是无用----- 来结束该文件的，包容。它应该产生（通过第一八佰伴pression会后）：

I would like to achieve a similar effect, but in the opposite direction. Using the output from the previous expression, I want to remove from -----THIS STUFF IS USELESS----- to the end of the file, inclusive. It should produce (after going through the first expression):

Files:
 somefiles.tar.gz 1 2 3
 somefiles.tar.gz 1 2 3

我也开到使用任何其他工具，只要它是可用的任何其他的POSIX系统上，并且不使用版本特定（例如GNU特异性）的选项。

I'm also open to using any other tools, as long as it is available on any other POSIX system and does not use version specific (e.g. GNU-specific) options.

实际的文本可以在这里找到： http://pastebin.com/CYBbJ3qr
注意从的变化-----这东西是无用----- 到 ----- BEGIN PGP签名---- -

The actual text can be found here: http://pastebin.com/CYBbJ3qr Note the change from -----THIS STUFF IS USELESS----- to -----BEGIN PGP SIGNATURE-----.

推荐答案

为什么不

 sed '/^-----THIS STUFF IS USELESS-----$/,$d' file

在一个范围内的前pression就像你用，'$'将指定到文件末尾的

In a range expression like you have used, ',$' will specify "to the end of the file"

1 is first line in file, 
$ is last line in file.

输出

Files:
 somefiles.tar.gz 1 2 3
 somefiles.tar.gz 1 2 3

IHTH

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