Re: Shell - escapes

[<tomas@tuxteam.de>]

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On Tue, May 10, 2016 at 04:19:10PM +0200, Thomas Schmitt wrote:

> Regrettably, Here Documents let the shell fiddle with their text.
> 
>   $ wc -c <<x
>   $(echo hello)
>   x
>   6
> 
> So this is not a way to express arbitrary literal text.

Not if you quote the delimiter cookie in single quotes (in bash,
at least):

  | cat <<EOT
  | the current shell is $SHELL, I think
  | EOT
  | 
  | => the current shell is /bin/bash, I think

but:

  | cat <<'EOT'
  | the current shell is $SHELL, I think
  | EOT
  | 
  | => the current shell is $SHELL, I think

A bit like Perl (or was it the other way 'round? ;-)

> > Would it be useful / possible to change
> 
> One can switch from one shell to the other, one can even program an
> own shell. But i see very few chance that bash or dash upstream would
> accept any change or addition attempt about quoting. It is just too
> fundamental and there are viable ways to express a literal string.

That's my take too. And I think the decision to move slowly, if ever
does make a ton of sense in this context.

regards
- -- t
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