Since version 2.01 readcd has a scanbus option,
however it doesn't work on FreeBSD:
fk@TP51 ~ $readcd -scanbus
readcd: Error 0. Cannot open SCSI driver.
This patch fixes the problem for me, I tested it with cdrtools and cdrtools-devel on FreeBSD 6.0 and 5.4.
The patch was sent to the cdrtools author and I believe
the problem will be fixed in one of the next alphas.
As it probably will take some time until the next
stable cdrtools version is out, I think it should be
fixed in the ports as well.
How-To-Repeat: Run readcd -scanbus on FreeBSD and compare the result with the output of cdrecord -scanbus.
I'll take it.