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Re: bash prints numeric values of unicode characters instead of their UT


From: Chet Ramey
Subject: Re: bash prints numeric values of unicode characters instead of their UTF8 representations
Date: Wed, 3 Feb 2016 16:13:49 -0500
User-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10; rv:38.0) Gecko/20100101 Thunderbird/38.5.1

On 2/3/16 3:20 PM, Yuri wrote:
> On 01/31/2016 13:41, Yuri wrote:
>> I have this line in ~/.bashrc:
>> PS1=$'\\[\e[0;38;5;202m\\]\u2514\u2023\\[\e[0m\\] ' 
> 
> This link
> http://unix.stackexchange.com/questions/25903/awesome-symbols-and-characters-in-a-bash-prompt
> says: "Since bash 4.2, you can use \u followed by 4 hexadecimal digits in a
> $'…' string".
> My bash-4.3.42 misinterprets \u as the user name instead.
> 
> So what could be wrong? Is \u supposed to be a user name or a unicode
> codepoint hexadecimal prefix?

Sigh.  You are mixing two things that perform backslash-escape character
processing.  If there is no character corresponding to a particular unicode
value in the current character set, the escape sequence is left unchanged.
So you get through a round of expansion with the $'...' processing, and the
\u2514 is preserved in the result.  The PS1 expansion code sees the \u and
turns it into the current username.

-- 
``The lyf so short, the craft so long to lerne.'' - Chaucer
                 ``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, ITS, CWRU    address@hidden    http://cnswww.cns.cwru.edu/~chet/



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