削减选项 -b 和 -c 将如何随着国际化而变得不同答案

【问题标题】：How will cut options -b and -c become different with Internationalization削减选项 -b 和 -c 将如何随着国际化而变得不同
【发布时间】：2014-09-02 08:36:31
【问题描述】：

`-b BYTE-LIST'
`--bytes=BYTE-LIST'
     Select for printing only the bytes in positions listed in
     BYTE-LIST.  Tabs and backspaces are treated like any other
     character; they take up 1 byte.  If an output delimiter is
     specified, (see the description of `--output-delimiter'), then
     output that string between ranges of selected bytes.

`-c CHARACTER-LIST'
`--characters=CHARACTER-LIST'
     Select for printing only the characters in positions listed in
     CHARACTER-LIST.  The same as `-b' for now, but
     internationalization will change that.  Tabs and backspaces are
     treated like any other character; they take up 1 character.  If an
     output delimiter is specified, (see the description of
     `--output-delimiter'), then output that string between ranges of
     selected bytes.

-c 的描述是这样的：目前与 `-b' 相同，但国际化会改变这一点。

我假设某些语言的国际化字符可能具有多字节字符，那是 -c 和 -b 的行为不同..正确吗？

【问题讨论】：

标签： bash cut

【解决方案1】：

是的。让我们做一个测试：

$ cat a
200
bést
203
-Ümlaut
$ cut -b2-3 a
00
é           <---- é has 2 bytes
03
Ü           <---- Ü has 2 bytes
$ cut -c2-3 a
00
és
03
Üm

【讨论】：

这对我来说很有意义。对我来说，在 Ubuntu 04.12 (UTF-8: "en_US.UTF-8") 上，'cut -c2-3 a' 和 'cut -b2-3 a' 产生相同的结果 - 'cut -b2-3 a'。
@Ronald 很有趣...我刚刚在 cygwin 8.15-1 中使用cut (GNU coreutils) 8.15 进行了尝试，它对于cut -b2-3 a 和cut -c2-3 a 也显示相同。它绝对必须与语言环境和剪辑版本一起使用。