Re: [Bashburn-info] cdrecord OPTIONS dump

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

On Wed, 08 Oct 2008 11:37:17 +0200
Markus Kollmar <mar...@on...> wrote:

> Nick Warne wrote:
> > 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
> >   
> 
> Nick, yes this works for me.
> 
> Note, for those who first maybe wondered also about the "missing" 
> redirection char:
> Some mail programms format the ">" before "/dev/null" to a graphical 
> vertical line (they interpret it as reply-statements). Looking the 
> message in source form shows that Nick formated it correct.
> 
> :-)
> 

OK, I will commit this to TRUNK.  Also I have appended an extra message
to lang/German/Swedish/English/configure.lang to bb_conf_ch_dropts.
This adds a 'Detecting CD Writer...' (using bb_text_7).

The reason I done this is due to me having two drives.  One dumps the
options to the screen immediately, and the other takes about 3 seconds
- so I end up looking at a blank screen wondering what is happening.
This message now tells the user that the drive is being queried.


Nick
-- 
Free Software Foundation Associate Member 5508