sed question

markhod · 08-03-2006, 05:15 AM

Hi,

If I have a text file:

a
b
c

and I would like to change it to:

echo "a"
a
echo "b"
b
echo "c"
c

how can this be done with sed? I figured out how to add the extra line in, but not how to print the previous line inside the "" marks. Is this possible?

Or is there some other command similar to sed that will allow me to do this?

Thanks,

Mark

konsolebox · 08-03-2006, 05:53 AM

do you mean something like the output of:

Code:

for a in $(<inputfile); do
    echo "echo \"$a\""
    echo "$a"
done > outputfile

spirit receiver · 08-03-2006, 06:23 AM

Here's a sed command:

Code:

sed -r 's/(.*)/echo "\1"\n\1/'

konsolebox · 08-03-2006, 07:22 AM

Quote:

Originally Posted by markhod

echo "a"
a
echo "b"
b
echo "c"
c

if this is really the output you need you can also try

Code:

sed s/.*/'echo "&"\n&'/

markhod · 08-03-2006, 07:24 AM

Quote:

Originally Posted by konsolebox

if this is really the output you need you can also try

Code:

sed s/.*/'echo "&"\n&'/

Thanks. That does the trick.

Cheers,

Mark