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use AWK to read an Environment variable

 
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# 1  
Old 06-09-2009
use AWK to read an Environment variable
Dear Unix gurus,

Perhaps I'm missing something,.....I'm having the most infernal difficulty getting AWK to read in an environment variable. For example,

Code:
 
value=5
awk '{print ""$value""}'

should return the number "5". This is not the case. Can somebody help?Smilie

cheers
# 2  
Old 06-09-2009
Code:
value=5
awk -v val=$value '{print val}'  anyfile

where anyfile is just a small file that exists
Last edited by jim mcnamara; 06-09-2009 at 01:26 PM..
# 3  
Old 06-09-2009
Quote:
Originally Posted by jim mcnamara
Code:
value=5
awk -v val=$value '{print val}'


doesn't work. my screen hangs.
# 4  
Old 06-09-2009
It hung because awk expected input from stdin. My bad. See the original post above
# 5  
Old 06-09-2009
nice! it works.

thanks
# 6  
Old 06-10-2009
Good One Jim Smilie

If you dont want to make use of any file, you can try using echo command:

e.g.
echo abc | awk -v val=$HOME '{print val}'

In your case:

echo abc | awk -v val=$value '{print val}'
# 7  
Old 06-10-2009
thanks.
 
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