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Date: Sun, 18 May 2003 02:04:17 -0400
From: "Bob Hall" <rjhalljr@starpower.net>
To: freebsd-questions@freebsd.org
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Subject: Re: how to know if there is a cd inside the cdwriter
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David Rio <drio@perpels.com> writes:
 
> I am writing a little script to backup my data. I would like 
> to know if there is a CD inside the cdwriter before launch the
> burn process. Any idea?

Here's a snippet from a bash script I use to do the same thing with 
a dvd burner. The burner is external, so the script has alread checked 
to see if the burner is mounted.

        melding=$(sudo mount -t ufs -o rw /dev/cd0a $montering_punkt 2>&1)
        #Om mount ikke returnerer 0, er noe galt.
        if [ $? -ne 0 ]
        then
                if [ "$melding" = "mount: /dev/cd0a: Device not configured" ]
                then

HTH, 
Bob Hall