Passing awk variables to bash variables


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# 1  
Passing awk variables to bash variables

Trying to do so
Code:
echo "111:222:333" |awk -F: '{system("export TESTO=" $2)}'

But it doesn't work

Last edited by urello; 12-30-2014 at 06:46 PM..
# 2  
You are passing them into a subshell, which does not affect the outer shell.
Code:
export TESTO=`echo "111:222:333" |awk -F: '{print $2}'`

or all shell:

echo "111:222:333" | (
IFS="$IFS:"
read x TESTO y
IFS="${IFS%:}" 
. . .
) # bash needs you to process inside a subshell, but ksh does not, uses the parent shell as the final shell on the pipe.


Last edited by DGPickett; 12-31-2014 at 10:15 AM..
# 3  
You can't pass awk variables to the shell directly. You could use an intermediate file or a (named) pipe, or you can use command substitution
Code:
TESTO=$(echo "111:222:333" | awk -F: '{print $2}')

or process substitution in bash/ksh93/zsh
Code:
read TESTO < <(echo "111:222:333" | awk -F: '{print $2}')

--
or a regular pipe in ksh and zsh only
Code:
echo "111:222:333" | awk -F: '{print $2}' | read TESTO

(also works with bash 4 with shopt -s lastpipe in a non-interactive shell)

Last edited by Scrutinizer; 12-30-2014 at 08:28 PM..
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