Grep 为什么'；格雷普能给我一条匹配的线吗？

我刚刚注意到

grep -rni 'a2}' *

不为所有具有字符串

a2}

的文档提供匹配行。为什么会这样

我试图创建一个最小的示例，但是当我创建一个新文件并粘贴内容时，它失败了。所以我把文件上传到了一个网站上。也许这是一个编码问题

该文件的内容是：

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\chapter{KV-Diagramme}
\label{chap:a2}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  \PsTexAbbildungOhneCaption{figures/a2-1}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%%% Local Variables:
%%% mode: latex
%%% TeX-master: "skript"
%%% End:

grep-rni'a2}'*

的结果是

moose@pc08 ~/Downloads/algorithms/grep $ grep -rni "a2}" *
%%% End:master: "skript"%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

但我预料

moose@pc08 ~/Downloads/algorithms/grep $ grep -rni "a2}" *
\label{chap:a2}

---

为什么会得到这个结果？

该文件具有CR行终止符，因此看起来是一个单行文件：

#> file anhang-2.tex
anhang-2.tex: LaTeX document, ASCII text, with CR line terminators

将其转换为Linux格式：

#>  mac2unix anhang-2.tex
mac2unix: converting file anhang-2.tex to Unix format ...
#>  grep -rni 'a2}' anhang-2.tex 
3:\label{chap:a2}

---

这是因为您的文件使用Mac OS 9行结尾。您需要首先转换为UNIX行结尾。如何执行此操作取决于您的场景，但您可以使用以下内容执行一个文件：

tr '\r' '\n' < anhang-2.tex > anhang-2.txt

tr'\r'\n'anhang-2.txt

---

然后，您将能够对新文件进行grep处理。

我得到以下输出：

tmp.txt:3:\label{chap:a2}

这很奇怪：我得到了您期望的结果。我也是。。。与预期的结果相同如果文件夹中的所有

.tex

文件都有CR行终止符，我如何检查它们？请尝试此@moose，

file*tex | grep CR

@perreal您对行终止的看法是正确的。我只是做了个简单的假设。编辑答案。谢谢