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Re: The First Pure Shell Contest (PUSH): relativepath

Cross-posted to 3 groups.

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In comp.unix.programmer pk <pk@pk.invalid> wrote:
# On 19 Aug 2011 19:29:31 GMT, Jens Schweikhardt <usenet@schweikhardt.net>
# wrote:
# 
#> In comp.unix.shell pk <pk@pk.invalid> wrote:
#> # 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.
#> 
#> And because I am aware of that I made explicit references to test and [
#> and printf. I'll never understand why people try so hard to
#> misunderstand on purpose... :-)
# 
# Still, I don't see where your rules forbid using Perl or Awk if one's POSIX
# shell has them built-in (which was the OP's question).

It forbidden by the well known standardese rule of "if it's not defined,
then it's undefined." aka "undefined by omission".

      3 You can assume that 'test' and '[' are built-ins. If this is not true
        for your shell you may set PATH with env -i PATH=... to the
        directory with the 'test' and '[' executables for the sole purpose of
        using these external commands. It must run without PATH on a shell where
        these are built-ins (i.e. on the contest evaluation machine).

perl isn't mentioned. So you can not assume it is a built-in.

I believe that the name of the contest gives an oh so slight hint that a
solution involving perl is not quite what is meant. The motivation
paragraph too (even mentions awk). If that isn't enough, the contestant
would surely wonder if perl was also a built-in on the unknown contest
evaluation machine.

Reading a text, understanding it and inferring a writer's intention are
the initial barriers to participating in the contest. I think this goes
for most contests. I admit there is room for improvement regarding its
formal "rules" (heck, the very word does not even appear once!), but I
did not want to overload the text with kilobytes of blah blah just to
fend off the nit-pickers, who would find a hole in any formal set of
rules. One thing I really should add for the next PUSH is "Rule
interpretation is MINE ALONE. PERIOD!" :-)

Regards,

	Jens
-- 
Jens Schweikhardt http://www.schweikhardt.net/
SIGSIG -- signature too long (core dumped)

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Thread

The First Pure Shell Contest (PUSH): relativepath Jens Schweikhardt <schweikh@schweikhardt.net> - 2011-08-19 17:23 +0000
  Re: The First Pure Shell Contest (PUSH): relativepath Stephane CHAZELAS <stephane_chazelas@yahoo.fr> - 2011-08-19 18:13 +0000
    Re: The First Pure Shell Contest (PUSH): relativepath Jens Schweikhardt <usenet@schweikhardt.net> - 2011-08-19 19:12 +0000
      Re: The First Pure Shell Contest (PUSH): relativepath pk <pk@pk.invalid> - 2011-08-19 21:14 +0200
        Re: The First Pure Shell Contest (PUSH): relativepath Jens Schweikhardt <usenet@schweikhardt.net> - 2011-08-19 19:29 +0000
          Re: The First Pure Shell Contest (PUSH): relativepath pk <pk@pk.invalid> - 2011-08-19 21:37 +0200
            Re: The First Pure Shell Contest (PUSH): relativepath Jens Schweikhardt <usenet@schweikhardt.net> - 2011-08-19 20:04 +0000
              Re: The First Pure Shell Contest (PUSH): relativepath pk <pk@pk.invalid> - 2011-08-19 22:25 +0200
                Re: The First Pure Shell Contest (PUSH): relativepath Jens Schweikhardt <usenet@schweikhardt.net> - 2011-08-19 21:08 +0000
  Re: The First Pure Shell Contest (PUSH): relativepath Rainer Weikusat <rweikusat@mssgmbh.com> - 2011-08-19 19:58 +0100
    Re: The First Pure Shell Contest (PUSH): relativepath Jens Schweikhardt <usenet@schweikhardt.net> - 2011-08-19 19:23 +0000
      Re: The First Pure Shell Contest (PUSH): relativepath Rainer Weikusat <rweikusat@mssgmbh.com> - 2011-08-19 22:18 +0100
  Re: The First Pure Shell Contest (PUSH): relativepath Stephane CHAZELAS <Stephane.CHAZELAS@free.fr> - 2011-08-20 20:07 +0000
    Re: The First Pure Shell Contest (PUSH): relativepath Jens Schweikhardt <usenet@schweikhardt.net> - 2011-08-21 10:43 +0000
    Re: The First Pure Shell Contest (PUSH): relativepath Rainer Weikusat <rweikusat@mssgmbh.com> - 2011-08-21 15:14 +0100
      Re: The First Pure Shell Contest (PUSH): relativepath Janis Papanagnou <janis_papanagnou@hotmail.com> - 2011-08-21 18:28 +0300
      Re: The First Pure Shell Contest (PUSH): relativepath Stephane CHAZELAS <stephane_chazelas@yahoo.fr> - 2011-08-21 16:19 +0000
        Re: The First Pure Shell Contest (PUSH): relativepath Stephane CHAZELAS <stephane_chazelas@yahoo.fr> - 2011-08-21 20:12 +0000
  Re: The First Pure Shell Contest (PUSH): relativepath Rainer Weikusat <rweikusat@mssgmbh.com> - 2011-08-22 21:15 +0100
    Re: The First Pure Shell Contest (PUSH): relativepath Stephane CHAZELAS <stephane_chazelas@yahoo.fr> - 2011-08-23 18:23 +0000
      Re: The First Pure Shell Contest (PUSH): relativepath Rainer Weikusat <rweikusat@mssgmbh.com> - 2011-08-23 19:52 +0100
        Re: The First Pure Shell Contest (PUSH): relativepath Stephane CHAZELAS <stephane_chazelas@yahoo.fr> - 2011-08-23 21:56 +0000

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