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file-systems: Add read-luks-partition-uuid. 

Add a specific procedure to read luks partition uuid.

* gnu/build/file-systems.scm (luks-partition-field-reader): New procedure ...
(luks-partition-uuid-predicate): ... used here,
(read-luks-partition-uuid): new exported procedure.
This commit is contained in:
Mathieu Othacehe 2018-12-08 23:32:23 +09:00 committed by Ludovic Courtès
parent df3664f1ec
commit 8ae7044f1d
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1 changed files with 8 additions and 3 deletions
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11
gnu/build/file-systems.scm
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@ -44,6 +44,7 @@
read-partition-label read-partition-label
read-partition-uuid read-partition-uuid
read-luks-partition-uuid
bind-mount bind-mount
@ -438,6 +439,12 @@ partition field reader that returned a value."
(define read-partition-uuid (define read-partition-uuid
(cut read-partition-field <> %partition-uuid-readers)) (cut read-partition-field <> %partition-uuid-readers))
(define luks-partition-field-reader
(partition-field-reader read-luks-header luks-header-uuid))
(define read-luks-partition-uuid
(cut read-partition-field <> (list luks-partition-field-reader)))
(define (partition-predicate reader =) (define (partition-predicate reader =)
"Return a predicate that returns true if the FIELD of partition header that "Return a predicate that returns true if the FIELD of partition header that
was READ is = to the given value." was READ is = to the given value."
@ -454,9 +461,7 @@ was READ is = to the given value."
(partition-predicate read-partition-uuid uuid=?)) (partition-predicate read-partition-uuid uuid=?))
(define luks-partition-uuid-predicate (define luks-partition-uuid-predicate
(partition-predicate (partition-predicate luks-partition-field-reader uuid=?))
(partition-field-reader read-luks-header luks-header-uuid)
uuid=?))
(define (find-partition predicate) (define (find-partition predicate)
"Return the first partition found that matches PREDICATE, or #f if none "Return the first partition found that matches PREDICATE, or #f if none