Re: [PATCH 1/2] posix: User scratch_buffer on fnmatch

[Paul Eggert]

On 1/14/21 2:00 AM, Florian Weimer wrote:
> We saw commercial demand for Shift-JIS much later than that.

Yes, I see Red Hat has a product enhancement for that, for coreutils, 
dated 2019.[1]

Shift-JIS is still very much alive and kicking in Japan in its own 
circles. Even DBCS EBCDIC is still used among old mainframe 
applications.[2] I very much doubt whether we need to worry about DBCS 
EBCDIC in GNU software, though.

Shift-JIS is a closer call as it's used a lot more than DBCS EBCDIC. 
However, my worry is that good support for non-ASCII-safe encodings like 
Shift-JIS is hard to do, and that any such support we'd add to 
Gnulib/coreutils/etc. would not only increase maintenance costs and 
reduce runtime performance, but also would be buggy in many oddball 
corner cases (and this would have security implications).

[1] https://access.redhat.com/errata/RHEA-2019:0008

[2] 
https://www.ibm.com/support/knowledgecenter/en/SS4PJT_6.0.0/cd_zos/cdzos_admin/ZOS_Overview_of_DBCS.html