Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Passing awk variables to bash variables
Top Forums Shell Programming and Scripting Passing awk variables to bash variables Post 302930153 by Scrutinizer on Tuesday 30th of December 2014 06:12:44 PM
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
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 07:28 PM..
 

10 More Discussions You Might Find Interesting

1. 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

2. 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

3. 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

4. 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

5. 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

6. 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

7. 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

8. 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

9. 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

10. 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

LEARN ABOUT DEBIAN

subst

SUBST(1)						      General Commands Manual							  SUBST(1)

NAME

       subst - substitute definitions into file(s)

SYNOPSIS

       subst [ -e editor ] -f substitutions victim ...

DESCRIPTION

       Subst  makes substitutions into files, in a way that is suitable for customizing software to local conditions.  Each victim file is altered
       according to the contents of the substitutions file.

       The substitutions file contains one line per substitution.  A line consists of two fields separated by one or more tabs.  The  first  field
       is  the name of the substitution, the second is the value.  Neither should contain the character `#', and use of text-editor metacharacters
       like `&' and `' is also unwise; the name in particular is best restricted to be alphanumeric.  A line starting with `#' is a  comment  and
       is ignored.

       In  the	victims, each line on which a substitution is to be made (a target line) must be preceded by a prototype line.	The prototype line
       should be delimited in such a way that it will be taken as a comment by whatever program processes the file later.  The prototype line must
       contain	a  ``prototype''  of  the  target  line  bracketed  by `=()<' and `>()='; everything else on the prototype line is ignored.  Subst
       extracts the prototype, changes all instances of substitution names bracketed by `@<' and `>@' to their values, and then replaces the  tar-
       get line with the result.

OPTIONS

       -e     Substitutions  are  done using the sed(1) editor, which must be found in either the /bin or /usr/bin directories.  To specify a dif-
	      ferent executable, use the ``-e'' flag.

EXAMPLE

       If the substitutions file is

	      FIRST	111
	      SECOND	222

       and the victim file is

	      x = 2;
	      /* =()<y = @<FIRST>@ + @<SECOND>@;>()= */
	      y = 88 + 99;
	      z = 5;

       then ``subst -f substitutions victim'' changes victim to:

	      x = 2;
	      /* =()<y = @<FIRST>@ + @<SECOND>@;>()= */
	      y = 111 + 222;
	      z = 5;

FILES

       victimdir/substtmp.new	 new version being built
       victimdir/substtmp.old	 old version during renaming

SEE ALSO

       sed(1)

DIAGNOSTICS

       Complains and halts if it is unable to create its temporary files or if they already exist.

HISTORY

       Written at U of Toronto by Henry Spencer.

       Rich $alz added the ``-e'' flag July, 1991.

BUGS

       When creating a file to be substed, it's easy to forget to insert a dummy target line after a prototype line; if you forget, subst ends	up
       deleting whichever line did in fact follow the prototype line.

								    25 Feb 1990 							  SUBST(1)
All times are GMT -4. The time now is 11:46 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy