On Sat 2017-09-16 (22:56), Goffredo Baroncelli wrote:
>> how can a user get a list of his subvolumes? He may created them some
>> time ago and forget it. He now wants to have a list of them.
>
> Far to be perfect, but this could help
>
> find / -inum 256 2>/dev/null
>
> each subvolume has inode number 256
But non-btrfs filesystems can also have an inode 256!
And it is terrible slow and inefficent.
Ok, I will add a sudo wrapper for my btrfs_subvolume_list :
#!/usr/bin/perl -w
$mounts = '/proc/mounts';
open $mounts,$mounts or die "$0: cannot open $mounts - $!\n";
while (<$mounts>) {
if (m:^(/\S+) (/\S*) btrfs:) {
push @bfs,$2;
}
}
close $mounts;
if (@bfs) {
@bfs = sort @bfs;
} else {
die "$0: no mounted btrfs filesystems\n";
}
@sv = ();
foreach my $fs (@bfs) {
push @sv,"$fs\n";
open $fs,"btrfs subvolume list '$fs'|" or next;;
while (<$fs>) {
chomp;
s:.* \d+ path :$fs/:;
push @sv,"$_\n" if -d;
}
close $fs;
}
print sort @sv;
--
Ullrich Horlacher Server und Virtualisierung
Rechenzentrum TIK
Universitaet Stuttgart E-Mail: horlacher@xxxxxxxxxxxxxxxxxxxx
Allmandring 30a Tel: ++49-711-68565868
70569 Stuttgart (Germany) WWW: http://www.tik.uni-stuttgart.de/
REF:<54b8bb4b-3807-15da-1db5-fab7b0ced253@xxxxxxxxx>
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