Hi Bo,
On 07/31/2012 07:49 AM, Liu Bo wrote:
> The idea is that we usually use snapshot to backup/restore our data, and the
> common way can be a cron script which makes lots of snapshots, so we can end
> up with spending some time to find the latest snapshot to restore.
>
> This adds a feature for 'btrfs subvolume list' to let it list snapshots by
> their
> _created_ generation.
>
> What we need to do is just to list them in descending order and get the latest
> snapshot. What's more, we can find the oldest snapshot as well by listing
> snapshots in ascending order.
>
> Signed-off-by: Liu Bo <[email protected]>
> ---
> btrfs-list.c | 176
> ++++++++++++++++++++++++++++++++++++++++++++++++++++--
> cmds-subvolume.c | 19 +++++-
> 2 files changed, 185 insertions(+), 10 deletions(-)
>
[....]
>
> static const char * const cmd_subvol_list_usage[] = {
> - "btrfs subvolume list [-p] <path>",
> + "btrfs subvolume list [-ps] <path>",
> "List subvolumes (and snapshots)",
> "",
> - "-p print parent ID",
> + "-p print parent ID",
> + "-s value list snapshots with generation in ascending/descending
> order",
> + " (1: ascending, 0: descending)",
Please change the user interface. I suggest something like:
-s|-S list snapshots with generation in ascending|descending
order
Or better
-s sort by generation
-P sort by path
-r reverse the sort order
Anyway, whichever your choice will be, please remember to update the man
page too.
> NULL
> };
[...]
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