Re: [PATCH] \e in "echo" and "printf" builtins

[Paul Gilmartin <PaulGBoulder@xxxxxxx>]

On 2014-06-28, at 10:52, Harald van Dijk wrote:

> On 28/06/14 06:56, Adam Borowski wrote:
>> 
>> 
>> I'm not sure what's your policy towards extensions, but \e as \033 is
>> something ubiquitous in the Unix world.  C compilers (gcc, clang, icc and
>> tcc -- but not MSVC), perl, shells (bash and zsh -- but not dash), etc.
>> 
>> What about supporting it in dash as well?
>> 
As a mostly passive lurker, I'm inclined to say, "No.  Dash doesn't
want to become bash."

   http://windtoons.com/images/Camel_-Head-Under-Tent-large.gif

OTOH, there's a POSIX requirement that builtins be indistinguishable
(except in performance) from the corresponding executables. 


> No comment on whether dash itself should accept \e, but you already
> found a compiler that doesn't support it at all, and many of the ones
> that do support it also (optionally) issue a warning for it. Should the
> C code perhaps be using \033 instead of \e?
> 
And here I put on my EBCDIC hat (crown of thorns) and say, "Be careful
using numeric code points; they're not portable."

-- gil

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