topic awk script in Operating System - Linux

awk script

Gemini_2 — Wed, 08 Feb 2006 15:38:00 GMT

I have the following awk script

list="apple:fruit
dog:animal"

for i in $list;
do
echo $i |awk -F: '{ vob =$1; vobpath=$2;
"unix-command vob" }'
done

I want to run a unix-command within awk, can it be done?

how do I let the unix command know "vob" is not literal "vob", but a variable?

thank you

Re: awk script

Jeff_Traigle — Wed, 08 Feb 2006 15:45:11 GMT

A quick look at the awk man page reveals there is a system(cmd) function that executes cmd and returns its exit code.

Re: awk script

Sundar_7 — Wed, 08 Feb 2006 15:48:31 GMT

Will this work for you ?

# echo "$list" | awk -F: '{print $1,$2}' | xargs -n1 unix-command

Re: awk script

Geoff Wild — Wed, 08 Feb 2006 15:49:59 GMT

Why not:

list="apple:fruit
dog:animal"

for i in `echo $list |awk -F: '{ print $1}'`
do
unixcommand $i
done

Rgds...Geoff

Re: awk script

James R. Ferguson — Wed, 08 Feb 2006 15:57:03 GMT

Hi:

I'm not sure exactly what you want to run, but you can do things like this:

# echo "hi:there" |awk -F: '{print $1;system("echo ok|xargs")}'

# echo "hi:there" |awk -F: '{print $1;system("date")}'

Regards!

...JRF...

Re: awk script

Gemini_2 — Wed, 08 Feb 2006 16:15:30 GMT

I like the system suggestion, other suggestions are also good. But, my unix command has a hard time taking the variable from awk..see below

for i in $list;
do
echo $i |awk -F: '{ vob =$1; vobpath=$2;
system("cleartool lsvob vob") }'
done

it interpret vob as "vob" instead of a variable...

Re: awk script

Andreas Voss — Wed, 08 Feb 2006 16:21:24 GMT

Hi,

try this:

for i in $list
do
echo $i |awk -F: '{ vob=$1; vobpath=$2;
system("cleartool lsvob" vob) }'
done

Regards

Re: awk script

James R. Ferguson — Wed, 08 Feb 2006 16:28:25 GMT

Hi Gemini:

Here's a better example:

# cat ./runner
#!/usr/bin/awk -f
{
system("echo ok " $1)
}

echo "Gemini" | ./runner

Notice that the command to run and its fixed arguments are enclosed in double quotes. The variable data is not.

Regards!

...JRF...

Re: awk script

Geoff Wild — Wed, 08 Feb 2006 17:06:38 GMT

Another way:

#!/bin/sh
list="apple:fruit
dog:animal"

for i in $list;
do
vob=`echo $i |awk -F: '{print $1}'`
echo $vob
done

Rgds...Geoff

Re: awk script

Gemini_2 — Wed, 08 Feb 2006 17:41:49 GMT

thanks for everyone's kind help!
I got it!

system("cleartool lsvob" vob) }'

I assigned everyone some points!!!!

thank you again!!