Re: Fwd: Non-upstream patches for bash (2014)

[Chet Ramey]

On 6/25/17 11:08 PM, George wrote:
> On Sun, 2017-06-25 at 12:23 -0400, Chet Ramey wrote:
>> On 6/24/17 1:41 PM, Eduardo A. Bustamante López wrote:
>>
>>> dualbus@debian:~$ LANG=zh_CN.GBK printf '\u4e57' | od -tx1 -An 81 5c It
>>> looks like it doesn't detect that \x81\x5c is a single character, and
>>> instead treats the multibyte character as separate characters. 
>>
>>
>> It's apparently not a single character in that locale.
>>
> 
> Yes it is!
> 
> https://en.wikipedia.org/wiki/GBK
> \x81 \x5C is a two-byte character from level GBK/3.

OK. The terminal emulator I'm using simply doesn't render the glyph.

> But unless I've misunderstood something, it seems to be behaving correctly
> already. At least, with the exception of within $'..' quotes.

It is behaving correctly. $'...' works using bytes.  You can get it to
expand a byte sequence to a multibyte character using \u or \x, but it
works on bytes and always has, just like in C.  Since 0x5c introduces an
escape sequence, that's how it's treated.

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