Hi Chuck,
Chuck Smith:
> These references were helpful to me today! This answered my last question
> about how to enumerate aufs branches only. I learned a lot
> about /proc/mounts and sys/fs/aufs and their differences between aufs
> versions.
Oh, I should write some notes about that.
- as you already know, there are differences between aufs versions under
/sys/fs/aufs.
- when the module parameter 'brs' is set to 1, the branch paths are not
showen in /proc/mounts. Instead, a new entry /sys/fs/aufs/si_XXXX/brN
appears.
To get the branch path from a shell script, I'd recommend,,,
(quote from auplink script and arranged)
# the function is defined in /etc/default/aufs
. /etc/default/aufs
# retrieve the mount options
mnt_opts=$(MntOpts "$mntpnt")
si=
eval $(echo "$mnt_opts" |
tr ',' '\n' |
grep '^si=')
# extract the path from sysfs or mount options
si_dir=/sys/fs/aufs/si_$si
if [ -r $si_dir/br0 ]
then
cd $si_dir
ls -1 br* |
cut -c3- |
sort -n |
sed -e 's/^/br/' |
xargs -rn 200 cat
cd $OLDPWD
else
echo "$mnt_opts" |
tr ',' '\n' |
sed -e 's/\\/\\\\/g' |
egrep '^(dirs=|br:)' |
tr ':' '\n'
fi |
sed -e 's/=r.*$//'
J. R. Okajima
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