topic SCRIPT variable in awk' find pattern in Operating System - HP-UX

SCRIPT variable in awk' find pattern

Gunwant — Thu, 21 May 2009 14:56:57 GMT

Hi

I want to use script variable in awk' find pattern.
///Code

WHENEVER="rstatd"
awk -v VAR=$WHENEVER 'BEGIN { FS="#"} /.*'VAR'.*/ { $0=$2 }; { print }'

I want to use variable VAR in "/.*'VAR'.*/"
so that i can make this script parametrize
and use repeatedly.

but it cannot replace the VAR variable value in the regular expression.

I tried all possible ways, for example
WHENEVER="rstatd"
cat /etc/inetd.conf|awk -v VAR=$WHENEVER 'BEGIN { FS="#"} /.*'$VAR'.*/ { $0=++a ":"$2 ;print VAR}; { print }' >/etc/inetd.conf.bl
##

WHENEVER="rstatd"
cat /etc/inetd.conf|awk -v VAR=$WHENEVER 'BEGIN { FS="#"} /.*'"$VAR"'.*/ { $0=++a ":"$2 ;print VAR}; { print }' >/etc/inetd.conf.bl
##
WHENEVER="rstatd"
cat /etc/inetd.conf|awk -v VAR=$WHENEVER 'BEGIN { FS="#"} /.*'$VAR'.*/ { $0=++a ":"$2 ;print VAR}; { print }' >/etc/inetd.conf.bl

it print the output without replacing the matching line.

If somebody can put a light on it.

Thanks

Re: SCRIPT variable in awk' find pattern

James R. Ferguson — Thu, 21 May 2009 16:24:54 GMT

Hi:

Try this:

# WHENEVER=rstatd;
# awk -v VAR=$WHENEVER 'BEGIN{FS="#"} $0~VAR {$0=$2};{print}' /etc/inetd.conf

...Notice too, that 'awk' will read the file without the need to 'cat' and pipe it. This eliminates an extra process!

Regards!

...JRF...

Re: SCRIPT variable in awk' find pattern

Gunwant — Fri, 22 May 2009 07:08:05 GMT

Thanks

It works

final awk command is

PARAM="rstatd"
awk -v VAR="^#.*$PARAM.*" 'BEGIN{FS="#"} $0~VAR {$0=$2};{print}' /etc/inetd.conf>/etc/inetd.conf.bl