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Full Discussion: awk: Print fields between two delimiters on separate lines and send to variables
Top Forums Shell Programming and Scripting awk: Print fields between two delimiters on separate lines and send to variables Post 302684991 by Corona688 on Friday 10th of August 2012 12:33:19 PM
Old 08-10-2012
If it doesn't work, please tell me in what way it did not work. Show me exactly what you did, word for word, letter for letter, keystroke for keystroke. I can't see your computer from here.

If nawk doesn't work, try awk.

You can feed it into awk on stdin, like zcat filename | awk -f env.awk

Why do you need each one to be its own variable? How would you even know which variable names to use, if they're always different? Wouldn't you rather put them in one string instead, so you could put it in a loop?

Code:
EMAILS=`zcat email.gz | awk -f env.awk`

for EMAIL in EMAILS
do
        echo "got email $EMAIL"
done

Or if you have thousands, put it in a while-read loop?

Code:
zcat email.gz | awk -f env.awk | while read EMAIL
do
        echo "Got email $EMAIL"
done

...or save to a temp file so you can use it more than once?

Code:
zcat email.gz | awk -f env.awk > /tmp/$$

while read EMAIL
do
        echo "got email $EMAIL"
done < /tmp/$$

while read EMAIL
do
        echo "got email $EMAIL"
done < /tmp/$$

rm -f /tmp/$$

Or if you really do want variable names:

Code:
N=1
zcat email.gz | awk -f env.awk | while read EMAIL
do
        # Set variables like email_0001, email_0002, ...
        echo "`printf "email_%04d" $N`=$EMAIL"
        N=`expr $N + 1`
done > /tmp/$$
. /tmp/$$
rm -f /tmp/$$

...but I really can't picture how this'd be more useful than the options above.
 

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