On Friday 15 January 2010 14:17, Christian Paro wrote:
>This will get you a mapping from the by-id to the by-path device names:
>
>for file in /dev/disk/by-id/*; do
> echo ${file/*\/} \
> $(ls -l /dev/disk/by-path |
> grep $(ls -l $file |
> awk '{print $11}') |
> awk '{print $9}')
>done
Nice!
Just as an aside: if you're going to run this sort of script during the boot
sequence, do yourself a favor and use the -n option on those ls(1) commands.
That will keep it from calling getpwent()/getgrent() to map the UIDs/GIDs to
names. Why bother? Well, if your system is configured to use LDAP as its
password database and the network ain't up yet, it's kind of not a good idea
to map those IDs to names. Can you say "60 second timeout"? :-)
And yes, I did find out the hard way when I had a guest that took forever to
boot.
One really should be using readlink(1) instead of ls for this sort of thing,
but unfortunately the powers that be placed readlink in /usr/bin, which is
often not available at boot-time. So we're stuck with ls.
- MacK.
-----
Edmund R. MacKenty
Software Architect
Rocket Software
275 Grove Street · Newton, MA 02466-2272 · USA
Tel: +1.617.614.4321
Email: m...@rs.com
Web: www.rocketsoftware.com
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