topic Re: Invoking shell commands from AWK in Operating System - HP-UX

Invoking shell commands from AWK

Deepak BS — Fri, 05 Dec 2003 05:36:36 GMT

Hi,

I have a simple awk script which will process a file and print out some lines. Now, for each of these lines I want to invoke a command, say "sed". Is there a way for doing this in awk?

Cheers,
Deepak

Re: Invoking shell commands from AWK

Tomek Gryszkiewicz — Fri, 05 Dec 2003 05:38:59 GMT

From man awk:
system(cmd) Executes cmd and returns its exit status

-Tomek

Re: Invoking shell commands from AWK

Deepak BS — Fri, 05 Dec 2003 05:50:06 GMT

Thats cool.

Thanks Tomek

Re: Invoking shell commands from AWK

Alan Turner — Fri, 05 Dec 2003 05:50:28 GMT

Here's a noddy example:

awk '$1 == "here" { system ("echo " S0 " | sed -e s/good/better/" ) }' << {{
no good text
here good text
there good text
{{

(produces "here better text")

Alternatively:

a) pipe the output from awk into sed, which would avoid awk runnng sed on each match
b) do the text selection and manipulation in PERL.