On Wed, Jun 10, 2015 at 03:23:56PM +0800, Tom Yan wrote:
> By the way, according to the blkid(8):
>
> -l Look up only one device that matches the search
> parameter specified with the -t option. If there are multiple devices
> that match the specified search parameter, then the device with
> the
> highest priority is returned, and/or the first
> device found at a given priority...
>
> However, as you can see in my last email, blkid_evaluate_tag() doesn't
> seem to return the first device. Only `blkid -lt PARTLABEL="EFI
> System" -o device`, which doesn't use the function, output the
> "/dev/sda1".
blkid_evaluate_tag() follows /etc/blkid.conf EVALUATE= setting (see
man blkid). The default is to use udev and /dev/disk/by-* symlinks
rather than the cache maintained by libblkid.
Maybe the best solution will be:
1/ add info about this behavior to findfs man page
2/ remove the shortcut:
> > /* convert LABEL/UUID lookup to evaluate request */
> > if (lookup && output_format == OUTPUT_DEVICE_ONLY && search_type &&
> > (!strcmp(search_type, "LABEL") || !strcmp(search_type, "UUID"))) {
> > eval++;
> > lookup = 0;
> > }
.. and for blkid always use cache based results to keep it
consistent.
Karel
--
Karel Zak <kzak@xxxxxxxxxx>
http://karelzak.blogspot.com
--
To unsubscribe from this list: send the line "unsubscribe util-linux" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
