转换行尾 [英] Convert line endings

问题描述

我一直使用 d2u 来转换行尾。安装Puppy Linux后，I
注意到它不是 d2u ，而是 dos2unix 。然后我注意到，
Ubuntu默认情况下都丢失了。

另一种方法是转换行尾吗？

解决方案

使用POSIX做这件事很麻烦：

• POSIX Sed 不支持 \r 或 \15 。即使是，
  选项 -i 不是POSIX




• a href =http://pubs.opengroup.org/onlinepubs/9699919799/utilities/awk.html =nofollow noreferrer> POSIX Awk 支持 \r 和 \15 ，但 -i inplace 选项
  不是POSIX




• d2u 和 dos2unix 不是 POSIX实用程序，但 是




• POSIX ex 不支持 \r ， \15 ， \\\
或 \12




要移除回车符：

  ex -bsc'％！awk{sub（/ \r /，\\）} 1'-cx file 
  

要添加回车符：

  ex -bsc'％！awk{sub（/ $ /，\\r\）} 1'-cx文件
  / pre> 
I have been using d2u to convert line endings. After installing Puppy Linux I
noticed that it does not come with d2u, but dos2unix. Then I noticed that
Ubuntu is missing both by default.

What is another way to convert line endings?
解决方案
Doing this with POSIX is tricky:


POSIX Sed does not support \r or \15. Even if it did, the in place
option -i is not POSIX
POSIX Awk does support \r and \15, however the -i inplace option
is not POSIX
d2u and dos2unix are not POSIX utilities, but ex is
POSIX ex does not support \r, \15, \n or \12


To remove carriage returns:
ex -bsc '%!awk "{sub(/\r/,\"\")}1"' -cx file
To add carriage returns:
ex -bsc '%!awk "{sub(/$/,\"\r\")}1"' -cx file


                        
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