How do I replace ' with sed....

@ngelot · 11-02-2007, 12:25 PM

I'm making a autoscan-script with scanimage and want to set up an "autofind-device", but I don't know how to replace ` or '

This is the scanimage command for listing supported devices:

scanimage -L

and the output is:

Code:

device `hpaio:/usb/HP_LaserJet_3052?serial=00CNSKN09261' is a Hewlett-Packard HP_LaserJet_3052 all-in-one

I would like to to something like:

scanimage -L | sed 's/device \`/\n/' | sed s/\'/\n/' | awk 'NR==2'

or

scanimage -L | awk '/\`/,/\'/'

So that the output is:

hpaio:/usb/HP_LaserJet_3052?serial=00CNSKN09261

But I can't get sed (or awk) to remove/read the ` or the '

How can I do this?

@ngelot

druuna · 11-02-2007, 01:47 PM

Hi,

The ` does not need escaping:

$ cat input | sed 's/device `/\n/'

hpaio:/usb/HP_LaserJet_3052?serial=00CNSKN09261' is a Hewlett-Packard HP_LaserJet_3052 all-in-one

Try using double qoutes for the second sed command:

$ cat input | sed 's/device `/\n/' | sed "s/'/\n/"

hpaio:/usb/HP_LaserJet_3052?serial=00CNSKN09261
is a Hewlett-Packard HP_LaserJet_3052 all-in-one

Hope this helps.

@ngelot · 11-02-2007, 07:04 PM

I was sure I tried double-quotes...

Anyway - this works:

cat input | sed 's/device `//' | sed "s/'/\n/" | sed q

Thanks!