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Programming > Awk > Re: How to pass...
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Re: How to pass UNIX variable into awk?

by Janis <janis_papanagnou@[EMAIL PROTECTED] > Apr 8, 2008 at 08:09 AM

On 8 Apr., 17:19, pk <p...@[EMAIL PROTECTED]
> wrote:
> RC wrote:
> > myvariable="hello"
>
> > cat my file, if first field match "hello", then print whole line
>
> awk '$1 ~ /hello/' myfile.txt
>
> > I tried
>
> > cat myfile.txt | awk -F: '$1 ~ /$myvariable/ {print $0}'
>
> > but doesn't work, I also tried double $ like $1 ~ /$$myvariable/
> > still no luck.
>
> > I did this more than 10 years ago, now I forget the trick.
> > If you know, please tell me again.
> > Thank Q in advance!
>
> awk -v myvar="hello" '$1 ~ myvar' myfile.txt

Or (if exact match is required instead of substring match)...

  awk -v myvar="hello" '$1==myvar' myfile.txt


Janis




 10 Posts in Topic:
How to pass UNIX variable into awk?
RC <raymond.chui@[EMAI  2008-04-08 10:43:05 
Re: How to pass UNIX variable into awk?
RC <raymond.chui@[EMAI  2008-04-08 10:57:32 
Re: How to pass UNIX variable into awk?
gazelle@[EMAIL PROTECTED]  2008-04-08 15:00:24 
Re: How to pass UNIX variable into awk?
Ed Morton <morton@[EMA  2008-04-08 18:21:57 
Re: How to pass UNIX variable into awk?
gazelle@[EMAIL PROTECTED]  2008-04-08 23:39:23 
Re: How to pass UNIX variable into awk?
Ed Morton <morton@[EMA  2008-04-08 19:00:06 
Re: How to pass UNIX variable into awk?
Ed Morton <morton@[EMA  2008-04-08 18:18:21 
Re: How to pass UNIX variable into awk?
pk <pk@[EMAIL PROTECTE  2008-04-08 17:19:25 
Re: How to pass UNIX variable into awk?
Janis <janis_papanagno  2008-04-08 08:09:54 
Re: How to pass UNIX variable into awk?
pk <pk@[EMAIL PROTECTE  2008-04-08 17:31:07 

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tan12V112 Fri May 16 23:34:22 CDT 2008.