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From: pk <pk@pk.invalid>
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Subject: Re: The First Pure Shell Contest (PUSH): relativepath
Date: Fri, 19 Aug 2011 21:14:32 +0200
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On 19 Aug 2011 19:12:58 GMT, Jens Schweikhardt <usenet@schweikhardt.net>
wrote:

> # Awk and Perl are built in my POSIX shell and not "[". Which am I
> # allowed to use?
> 
> Then our understanding of the term "built-in" is very different and
> I'm afraid it is yours that is the non-conventional one.

POSIX does not forbid a shell to have whatever you may think of built-in.