Passing awk variables to bash variables

Thread Tools Search this Thread
Top Forums Shell Programming and Scripting Passing awk variables to bash variables
# 1  
Old 12-30-2014
Passing awk variables to bash variables

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

But it doesn't work

Last edited by urello; 12-30-2014 at 05:46 PM..
# 2  
Old 12-30-2014
You are passing them into a subshell, which does not affect the outer shell.
export TESTO=`echo "111:222:333" |awk -F: '{print $2}'`

or all shell:

echo "111:222:333" | (
read x TESTO y
. . .
) # 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 09:15 AM..
# 3  
Old 12-30-2014
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
TESTO=$(echo "111:222:333" | awk -F: '{print $2}')

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

or a regular pipe in ksh and zsh only
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 07:28 PM..
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

[Bash] passing variables to executable doesn't work

Bash version 4.4.20 / Ubuntu 16.0.4 Hello, I tried to write a script that gathers some data and passes them to an executable. The executed application answers with an error. The echo output in the script returns correct values. If I copy/paste the last echo command, it get's executed... (2 Replies)
Discussion started by: sushi2k7
2 Replies

2. Shell Programming and Scripting

awk - passing variables in and out

Am looking to pass some Linux environment variables into AWK , can I simply use the -v option ? awk -F: -v AHOME=$HOME '{ if {rm AHOME/file.txt a=2 } }' config.txt ... (4 Replies)
Discussion started by: alldbest
4 Replies

3. Shell Programming and Scripting

[BASH] Getting a semi-tailing backslash when passing (escaped) variables to script

Heyas Figured me had a 'typo' in tui-conf-set, i went to fix it. Now, i also figured, it might be nice to have tui-conf-set report (to console, not only exit code) wether it could save the variable to the file or not. This said, I appended this code: (the tui-title and tui-echo lines are... (3 Replies)
Discussion started by: sea
3 Replies

4. Shell Programming and Scripting

Passing variables to awk

Hi guys, I need to fetch data from logfile between two given dates,i got the below code from our forum.It works perfect,but i need to enter the value dynamically to awk while running. awk '/2012 Jun/{p=1}!/2012 Jul/ && prev~/2012 Jul/ && p{p=0}{prev=$0}p' file i tried the below code,but... (4 Replies)
Discussion started by: mohanalakshmi
4 Replies

5. Shell Programming and Scripting

Passing variables into AWK

I'm trying to use awk to write new entries to a hosts file if they don't exist. I need to do so depending on the type of system I have. Below is what I have, but it isn't working. awk -v myip1=$IP1 myip2=$IP2 myhost1=$HOST1 myhost2=$HOST2' BEGIN { mqhost1=0; mqhost2=0; stap1=0; stap2=0; } ... (4 Replies)
Discussion started by: Boomn4x4
4 Replies

6. Shell Programming and Scripting

Passing variables from bash to php-cli

Hello everyone, I've been looking how to pass variables between bash and php-cli in 1 file. So far i got this: #!/bin/bash echo "This is bash" php << EOF <?php echo "This is php\n"; ?> EOF I would now like to be able to pass a variable declared in the bash to the php. I already... (0 Replies)
Discussion started by: robbee
0 Replies

7. Shell Programming and Scripting

Passing variables problem - Bash

I have a following problem: #!/bin/bash NUM=`cat accounts | wc -l`; for i in {1..$NUM} do account=`awk "NR==$i" accounts`; echo -e "\nAccount: $account\n"; sudo ./backup_maildir $account; done "accounts" is a file with regular e-mail addresses, one in each line.... (2 Replies)
Discussion started by: bobanpetrovic
2 Replies

8. Shell Programming and Scripting

Passing awk Variables

I am trying to pass the results from a variable gathered from awk, however when I echo the 'PARSE' and 'SUB', the response is blank. This is my command. awk -F= '/Unit/''{ PARSE=substr($2,1,5) ; SUB=substr($2,1,1) }' inputfile.lst Is this a kind of valid attempt or am I obligated to declare... (3 Replies)
Discussion started by: gozer13
3 Replies

9. Shell Programming and Scripting

Passing Variables to Awk

Hi I have a unix shell script with an awk statement. I would like to print some of the fields of an input file. However, I would like to print them dynamically, ie by passing the literal $1 $3 into the script to define the output. I have tried the following: variable1='$1' awk... (2 Replies)
Discussion started by: Bab00shka
2 Replies

10. Shell Programming and Scripting

Passing Variables to AWK

Does anybody have an explanation for the following: The following scripts runs fine on IRIX64 6.5 but has bugs on Solaris 8. #! /bin/sh echo run only on an SGI machine echo type in linenumber read j echo value read value awk -f rmspass2 level=$value $j'step1.mlf' When the script is... (5 Replies)
Discussion started by: AreaMan
5 Replies
Login or Register to Ask a Question

Featured Tech Videos