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probe: Support probing for partition UUID with --part-uuid

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Linux supports root=PARTUUID=<partuuid> boot argument, so add
support for probing it. Compared to the fs UUID, the partition
UUID does not change when reformatting a partition.

For now, only disks using a GPT partition table are supported.

Signed-off-by: Jacob Kroon <jacob.kroon@gmail.com>
Reviewed-by: Paul Menzel <pmenzel@molgen.mpg.de>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
This commit is contained in:
Jacob Kroon 2019-05-15 21:04:43 +02:00 • committed by Daniel Kiper
parent 26094f5241
commit f2b9083f85
2 changed files with 37 additions and 1 deletions
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4
docs/grub.texi
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@ -4771,9 +4771,11 @@ a rest.
@node probe
@subsection probe
@deffn Command probe [@option{--set} var] @option{--driver}|@option{--partmap}|@option{--fs}|@option{--fs-uuid}|@option{--label} device
@deffn Command probe [@option{--set} var] @option{--driver}|@option{--partmap}|@option{--fs}|@option{--fs-uuid}|@option{--label}|@option{--part-uuid} device
Retrieve device information. If option @option{--set} is given, assign result
to variable @var{var}, otherwise print information on the screen.
The option @option{--part-uuid} is currently only implemented for GPT-formatted disks.
@end deffn