Re: [Bashburn-info] cdrecord OPTIONS dump

[Nick W. <ni...@uk...>]

On Tue, 7 Oct 2008 22:48:22 -0400 (EDT)
"Steven W. Orr" <st...@sy...> wrote:

> 
> The reason is that that command writes to stderr and not to stdout.
> So, if you want your command to pipe its stderr to grep you have to
> say this:
> 
> cdrecord dev=/dev/<your_drive> driveropts=help -checkdrive 2>&1 | \
> 	grep -i Driver
> 
> which sez in English: "run the command and dup(2) stderr onto stdout
> and close stderr. Then take the combined stderr and stdout that is
> now on stdout and pipe it to grep."
> 
> Make sense?

Yes, I think we all know about that... but it wasn't something I
thought about.

Anyway, it still is peculair.  The line below NOW only prints out Driver
Options (I guess 20 lines will be enough) but still have to dump
to /dev/null.

cdrecord dev=/dev/<you_drive> driveropts=help -checkdrive 2>&1
> /dev/null | grep -A 20 "Driver options"

Please test this line - if it works for all of us, I guess it could be
used to only print out drivers options.

Nick
-- 
Free Software Foundation Associate Member 5508