Re: Issue with Bash-4.3 Official Patch 27

[Greg Wooledge]

> Von:    Chet Ramey <chet.ramey@case.edu>
> No, shell variable names should continue to be shell identifiers.  You
> can already use `%' (any character, really) in environment variable
> names.

On Fri, Oct 17, 2014 at 05:22:30PM +0200, Lorenz.Bucher.ext@rohde-schwarz.com 
wrote:
> No, I can't. 
> $ foo%%="bar"
> foo%%=bar: command not found

What Chet meant is that it's possible to create environment variables
with "%" in their names.  C can do it, and so can env(1), but bash can't.

>From bash's point of view, the environment variables that it recevies
from its parent fall into three groups:

1) Variables whose names are valid shell identifiers.  These become shell
   variables.

2) Variables whose names match the pattern "BASH_FUNC_*%%".  These
   indicate bash exported functions, and are parsed to create function
   definitions.

3) Everything else.  These are ignored.

Bash currently does not have a mechanism to create environment variables
with arbitrary names.

> Or better said not in the normal way
> $ set foo%%=bar

That's totally different.  That's just setting the positional parameters
with %% as part of the *content*, not part of a variable name.