need example for awk command and awk within awk command in in shell script

Question

I need a simple working example that makes me understand

1, awk command in shell script. 2, awk withing awk command in shell script.

Without some idea of what it is you're trying to achieve, or what your current skill / knowledge level is, anything trying to 'make you understand' is going to be at best, a shot in the dark... — forsvarir
– forsvarir, Commented Apr 19, 2011 at 11:34
Is this homework? If so, what have you tried so far and why has it not worked out? If not, what are you actually trying to accomplish. Be specific. — JUST MY correct OPINION
– JUST MY correct OPINION, Commented Apr 19, 2011 at 11:37
Get an awk tutorial and go through it. Try these things out and get back to the forum. — Noufal Ibrahim
– Noufal Ibrahim, Commented Apr 19, 2011 at 11:42

William Pursell · Accepted Answer · 2011-04-19 12:22:23Z

2

I'm not really sure what the point is, but here's awk calling awk from within a shell script...

#!/bin/sh

cmd='BEGIN {print \"foo\"}'
echo foo |
awk "{ system( \"awk '$cmd'\" )}"

answered Apr 19, 2011 at 12:22

William Pursell

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2 Comments

Logeshwari Ram Over a year ago

Hi William, I'm facing problem when compiling this program - stackoverflow.com/questions/5716325/problem-in-using-awk . kindly suggest your opinion

William Pursell Over a year ago

@Logeshwari The program there is not valid. You do not have balanced backquotes. Also, are you trying to use the value of var1 within the program that assigns to var1? I think perhaps there are some lines missing from that snippet.

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