How to acess Variable defined in perl script inside an awk call

sumin · 04-25-2007, 02:04 AM

In a perl script i am defining a variable called ColumnNum and assigning a value 5.

$ColumnNum=5;

I want to use this $ColumnNum to be used in the following awk call

$getCPUinfo = 'sar 1 1 |awk \'{print $($columnNum)}\'';

I am not able to use the variable since it is defined outside the awk .

Please help me with this..

theYinYeti · 04-25-2007, 03:20 AM

You have to use awk's "-v var=val" option.

Yves.

ghostdog74 · 04-25-2007, 03:22 AM

Quote:

Originally Posted by sumin

In a perl script i am defining a variable called ColumnNum and assigning a value 5.

$ColumnNum=5;

I want to use this $ColumnNum to be used in the following awk call

$getCPUinfo = 'sar 1 1 |awk \'{print $($columnNum)}\'';

I am not able to use the variable since it is defined outside the awk .

Please help me with this..

you can try this:

Code:

$getCPUinfo = 'sar 1 1 |awk -v colnum=$columnNum \'{print colnum}\'';

sumin · 04-26-2007, 05:19 AM

Quote:

Originally Posted by ghostdog74

you can try this:

Code:

$getCPUinfo = 'sar 1 1 |awk -v colnum=$columnNum \'{print colnum}\'';

Thank you for ur help.........