[U-Boot] HUSH logical AND/OR expressions

[Wolfgang Denk]

Dear Joe,

In message <CANr=Z=YxsT-VOje5jA0k00BSxNROXBOPXMG-Q_8_7jAYN=fJCw at mail.gmail.com> you wrote:
> 
> > I noticed you asked for a reference to the original hush code that is the
> > origin for U-Boot's adaptation. I couldn't find a reply to that question. I
> > also haven't been able to find anything with a quick we search. Do you know
> > where it did come from?
> 
> I never got a response, but it appears to be busybox...

Oops, sorry.  Yes, of course it is busybox.

As far as I can tell, it was added around October 2001 to the PPCBoot
project as part of the PPCBoot v1.1.0 release:

* Added "hush" shell (from Busybox) as alternative command line 
  interpreter, thus enabling powerful command line syntax like 
  if...then...else...fi conditionals or `&&' and '||' constructs
  ("shell scripts").

  See the README file for information about implementation and usage.


Best regards,

Wolfgang Denk

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