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Old 09-01-2007, 02:15 PM   #1
Registered: Dec 2003
Distribution: Debian, FreeBSD
Posts: 310

Rep: Reputation: 35
Shell variables in awk to define range

I'm trying to use a shell variable in the following awk command.

awk  '/""/,/^};/' named.conf

That will run properly, and output the zone data for

What I want to do is replace "" with a shell variable that will have changing values.

I am having a problem with shell variables in this usage of awk. As a test I did this,

$ awk -v zone=$DOMAIN 'BEGIN { print zone}'
Works fine, however when I try to use it with the initial awk command it doesn't work as expected.

awk -v domain=$ZONE '/domain/,/^};/' named.conf
Where $ZONE is equal to a valid zone in named.conf returns nothing. It is instead looking for the word "domain" and not the variable.

Thanks in advance
Old 09-01-2007, 02:22 PM   #2
Registered: Dec 2003
Distribution: Debian, FreeBSD
Posts: 310

Original Poster
Rep: Reputation: 35

awk "/$ZONE/,/^};/" named.conf

awk -v domain="$ZONE" '$0 ~ domain, /^};/' named.conf

Both work.


Those will also match subdomains,

To fix that so they only return an exact match,

awk "/\"$ZONE\"/,/^};/" named.conf


awk -v domain="$ZONE" '$0 ~ "\""domain "\"", /^};/' named.conf

Last edited by fur; 09-01-2007 at 02:56 PM.


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