Re: How to tell a CD's filesystem format? (SOLVED)
I wrote:
Is there an easy way in Linux to determine whether a compact disc is an
audio CD or a data CD, and if it's a data CD, which filesystem is on it?
One would think that the "file" command would say, but it just tells you
that the CDROM device file is a device file.
I turns out that if the CD has a filesystem on it, "file -s" will tell
me which one. file's man page says that it avoids reading the contents
special files by default because read accesses to physical devices might
have unfortunate consequences.
$ file -s /dev/scd0
/dev/scd0: ISO 9660 CD-ROM filesystem data 'TURBOTAX98 '
But file won't identify audio CDs:
/dev/scd0: ERROR: cannot read `/dev/scd0' (Input/output error)
I installed cdparanoia with "apt-get cdparanoia" and found that the
--query option will print out the table of contents:
Table of contents (audio tracks only):
track length begin copy pre ch
===========================================================
1. 23280 [05:10.30] 0 [00:00.00] no no 2
...
If the CD in the drive isn't an audio CD, cdparanoia reports "unable to
open disc".
I still don't know of a single program that will make a positive
identification of both kinds of CDs, but both file and cdparanoia
provide non-zero exit status upon error, so it should be very simple to
write a small shell script to do it.
--
Rippit the Ogg Frog
rippit@oggfrog.com
http://www.oggfrog.com/
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