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Message from discussion windows scripting with gawk
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Manuel Collado  
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 More options Sep 15 2012, 2:52 pm
Newsgroups: comp.lang.awk
From: Manuel Collado <m.coll...@domain.invalid>
Date: Sat, 15 Sep 2012 20:52:14 +0200
Local: Sat, Sep 15 2012 2:52 pm
Subject: Re: windows scripting with gawk
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El 15/09/2012 18:09, pop escribi :

> pop said the following on 9/15/2012 11:04 AM:
>> Manuel Collado said the following on 9/15/2012 9:56 AM:
>>>> There is no unix/linux equivalent method to set an environment
>>>> variable in
>>>> windows as explained above. The only way I have been able to do it
>>>> (within
>>>> [g]awk) is as follows:

>>>> set x=7
>>>> echo %x%
>>>> 7
>>>> gawk "BEGIN{ x=8;print \"@set x=\"x >\"setx.bat\" }"
>>>> call setx
>>>> echo %x%
>>>> 8

>>>> Note that "call" is used if in a batch file and further batch statements
>>>> are present since a batch file is immediately exited without the "call".

>>>> HTH
>>>> pop is Mark

>>> On Windows XP and later:

>>> awk "BEGIN {exit 8}"
>>> set x=%ERRORLEVEL%
>>> echo %x%
>>> 8

>> This only works for numerical values 0-255; other method will work for
>> all (legal) numerical values as well as text.

>> regards;
>> pop->Mark

> I stand corrected on the numerical values... apparently "exit number" works
> for any legal number...

If string values must also been supported, the there is a tricky solution
based on command expansions in FOR lists:

for /F %%k in ('awk "BEGIN {print \"alpha\"}"') do set x=%%k
echo %x%
alpha

The above works for a script in a file. At the interactive console just
type %k instead of %%k.

--
Manuel Collado - http://lml.ls.fi.upm.es/~mcollado


 
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