file-systems: Introduce (gnu system uuid).
* gnu/build/file-systems.scm (sub-bytevector) (latin1->string, %fat32-endianness, fat32-uuid->string) (%iso9660-uuid-rx, string->iso9660-uuid) (iso9660-uuid->string, %network-byte-order) (dce-uuid->string, %uuid-rx, string->dce-uuid) (string->ext2-uuid, string->ext3-uuid, string->ext4-uuid) (vhashq, %uuid-parsers, %uuid-printers, string->uuid) (uuid->string): Move to... * gnu/system/uuid.scm: ... here. New file. * gnu/system/file-systems.scm (uuid): Move to the above file. * gnu/system/vm.scm: Adjust accordingly. * gnu/local.mk (GNU_SYSTEM_MODULES): Add uuid.scm.
This commit is contained in:
Ludovic Courtès
parent
943e1b975f
commit
47cef4ecad
@ -19,6 +19,7 @@
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;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
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(define-module (gnu build file-systems)
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#:use-module (gnu system uuid)
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#:use-module (guix build utils)
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#:use-module (guix build bournish)
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#:use-module (guix build syscalls)
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@ -26,9 +27,6 @@
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#:use-module (rnrs bytevectors)
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#:use-module (ice-9 match)
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#:use-module (ice-9 rdelim)
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#:use-module (ice-9 format)
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#:use-module (ice-9 regex)
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#:use-module (ice-9 vlist)
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#:use-module (system foreign)
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#:autoload (system repl repl) (start-repl)
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#:use-module (srfi srfi-1)
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@ -42,17 +40,6 @@
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find-partition-by-luks-uuid
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canonicalize-device-spec
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uuid->string
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dce-uuid->string
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string->uuid
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string->dce-uuid
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string->iso9660-uuid
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string->ext2-uuid
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string->ext3-uuid
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string->ext4-uuid
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string->btrfs-uuid
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iso9660-uuid->string
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bind-mount
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mount-flags->bit-mask
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@ -98,20 +85,6 @@ takes a bytevector and returns #t when it's a valid superblock."
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(and (magic? block)
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block)))))))))
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(define (sub-bytevector bv start size)
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"Return a copy of the SIZE bytes of BV starting from offset START."
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(let ((result (make-bytevector size)))
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(bytevector-copy! bv start result 0 size)
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result))
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(define (latin1->string bv terminator)
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"Return a string of BV, a latin1 bytevector, or #f. TERMINATOR is a predicate
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that takes a number and returns #t when a termination character is found."
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(let ((bytes (take-while (negate terminator) (bytevector->u8-list bv))))
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(if (null? bytes)
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#f
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(list->string (map integer->char bytes)))))
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(define null-terminated-latin1->string
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(cut latin1->string <> zero?))
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@ -199,10 +172,6 @@ if DEVICE does not contain a btrfs file system."
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;; <http://www.ecma-international.org/publications/files/ECMA-ST/Ecma-107.pdf>.
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(define-syntax %fat32-endianness
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;; Endianness of fat file systems.
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(identifier-syntax (endianness little)))
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(define (fat32-superblock? sblock)
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"Return #t when SBLOCK is a fat32 superblock."
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(bytevector=? (sub-bytevector sblock 82 8)
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@ -217,12 +186,6 @@ if DEVICE does not contain a btrfs file system."
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"Return the Volume ID of a fat superblock SBLOCK as a 4-byte bytevector."
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(sub-bytevector sblock 67 4))
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(define (fat32-uuid->string uuid)
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"Convert fat32 UUID, a 4-byte bytevector, to its string representation."
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(let ((high (bytevector-uint-ref uuid 0 %fat32-endianness 2))
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(low (bytevector-uint-ref uuid 2 %fat32-endianness 2)))
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(format #f "~:@(~x-~x~)" low high)))
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(define (fat32-superblock-volume-name sblock)
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"Return the volume name of SBLOCK as a string of at most 11 characters, or
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#f if SBLOCK has no volume name. The volume name is a latin1 string.
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@ -244,27 +207,6 @@ Trailing spaces are trimmed."
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;; <http://www.ecma-international.org/publications/files/ECMA-ST/Ecma-119.pdf>.
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(define %iso9660-uuid-rx
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;; Y m d H M S ss
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(make-regexp "^([[:digit:]]{4})-([[:digit:]]{2})-([[:digit:]]{2})-([[:digit:]]{2})-([[:digit:]]{2})-([[:digit:]]{2})-([[:digit:]]{2})$"))
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(define (string->iso9660-uuid str)
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"Parse STR as a ISO9660 UUID (which is really a timestamp - see /dev/disk/by-uuid).
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Return its contents as a 16-byte bytevector. Return #f if STR is not a valid
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ISO9660 UUID representation."
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(and=> (regexp-exec %iso9660-uuid-rx str)
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(lambda (match)
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(letrec-syntax ((match-numerals
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(syntax-rules ()
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((_ index (name rest ...) body)
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(let ((name (match:substring match index)))
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(match-numerals (+ 1 index) (rest ...) body)))
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((_ index () body)
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body))))
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(match-numerals 1 (year month day hour minute second hundredths)
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(string->utf8 (string-append year month day
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hour minute second hundredths)))))))
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(define (iso9660-superblock? sblock)
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"Return #t when SBLOCK is an iso9660 volume descriptor."
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(bytevector=? (sub-bytevector sblock 1 6)
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@ -311,20 +253,6 @@ SBLOCK as a bytevector. If that's not set, returns the creation time."
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modification-time)))
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(sub-bytevector time 0 16))) ; strips GMT offset.
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(define (iso9660-uuid->string uuid)
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"Given an UUID bytevector, return its timestamp string."
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(define (digits->string bytes)
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(latin1->string bytes (lambda (c) #f)))
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(let* ((year (sub-bytevector uuid 0 4))
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(month (sub-bytevector uuid 4 2))
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(day (sub-bytevector uuid 6 2))
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(hour (sub-bytevector uuid 8 2))
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(minute (sub-bytevector uuid 10 2))
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(second (sub-bytevector uuid 12 2))
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(hundredths (sub-bytevector uuid 14 2))
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(parts (list year month day hour minute second hundredths)))
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(string-append (string-join (map digits->string parts) "-"))))
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(define (iso9660-superblock-volume-name sblock)
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"Return the volume name of SBLOCK as a string. The volume name is an ASCII
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string. Trailing spaces are trimmed."
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@ -511,99 +439,6 @@ were found."
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(define find-partition-by-luks-uuid
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(find-partition luks-partition-uuid-predicate))
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;;;
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;;; UUIDs.
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;;;
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(define-syntax %network-byte-order
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(identifier-syntax (endianness big)))
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(define (dce-uuid->string uuid)
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"Convert UUID, a 16-byte bytevector, to its string representation, something
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like \"6b700d61-5550-48a1-874c-a3d86998990e\"."
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;; See <https://tools.ietf.org/html/rfc4122>.
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(let ((time-low (bytevector-uint-ref uuid 0 %network-byte-order 4))
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(time-mid (bytevector-uint-ref uuid 4 %network-byte-order 2))
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(time-hi (bytevector-uint-ref uuid 6 %network-byte-order 2))
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(clock-seq (bytevector-uint-ref uuid 8 %network-byte-order 2))
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(node (bytevector-uint-ref uuid 10 %network-byte-order 6)))
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(format #f "~8,'0x-~4,'0x-~4,'0x-~4,'0x-~12,'0x"
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time-low time-mid time-hi clock-seq node)))
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(define %uuid-rx
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;; The regexp of a UUID.
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(make-regexp "^([[:xdigit:]]{8})-([[:xdigit:]]{4})-([[:xdigit:]]{4})-([[:xdigit:]]{4})-([[:xdigit:]]{12})$"))
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(define (string->dce-uuid str)
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"Parse STR as a DCE UUID (see <https://tools.ietf.org/html/rfc4122>) and
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return its contents as a 16-byte bytevector. Return #f if STR is not a valid
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UUID representation."
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(and=> (regexp-exec %uuid-rx str)
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(lambda (match)
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(letrec-syntax ((hex->number
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(syntax-rules ()
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((_ index)
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(string->number (match:substring match index)
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16))))
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(put!
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(syntax-rules ()
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((_ bv index (number len) rest ...)
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(begin
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(bytevector-uint-set! bv index number
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(endianness big) len)
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(put! bv (+ index len) rest ...)))
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((_ bv index)
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bv))))
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(let ((time-low (hex->number 1))
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(time-mid (hex->number 2))
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(time-hi (hex->number 3))
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(clock-seq (hex->number 4))
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(node (hex->number 5))
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(uuid (make-bytevector 16)))
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(put! uuid 0
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(time-low 4) (time-mid 2) (time-hi 2)
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(clock-seq 2) (node 6)))))))
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(define string->ext2-uuid string->dce-uuid)
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(define string->ext3-uuid string->dce-uuid)
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(define string->ext4-uuid string->dce-uuid)
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(define string->btrfs-uuid string->dce-uuid)
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(define-syntax vhashq
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(syntax-rules (=>)
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((_)
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vlist-null)
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((_ (key others ... => value) rest ...)
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(vhash-consq key value
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(vhashq (others ... => value) rest ...)))
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((_ (=> value) rest ...)
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(vhashq rest ...))))
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(define %uuid-parsers
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(vhashq
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('dce 'ext2 'ext3 'ext4 'btrfs 'luks => string->dce-uuid)
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('iso9660 => string->iso9660-uuid)))
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(define %uuid-printers
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(vhashq
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('dce 'ext2 'ext3 'ext4 'btrfs 'luks => dce-uuid->string)
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('iso9660 => iso9660-uuid->string)
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('fat32 'fat => fat32-uuid->string)))
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(define* (string->uuid str #:key (type 'dce))
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"Parse STR as a UUID of the given TYPE. On success, return the
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corresponding bytevector; otherwise return #f."
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(match (vhash-assq type %uuid-parsers)
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(#f #f)
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((_ . (? procedure? parse)) (parse str))))
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(define* (uuid->string bv #:key (type 'dce))
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"Convert BV, a bytevector, to the UUID string representation for TYPE."
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(match (vhash-assq type %uuid-printers)
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(#f #f)
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((_ . (? procedure? unparse)) (unparse bv))))
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(define* (canonicalize-device-spec spec #:optional (title 'any))
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"Return the device name corresponding to SPEC. TITLE is a symbol, one of
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@ -26,7 +26,7 @@
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#:use-module (guix build syscalls)
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#:use-module (gnu build linux-boot)
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#:use-module (gnu build install)
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#:use-module (gnu build file-systems)
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#:use-module (gnu system uuid)
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#:use-module (guix records)
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#:use-module ((guix combinators) #:select (fold2))
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#:use-module (ice-9 format)
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@ -468,6 +468,7 @@ GNU_SYSTEM_MODULES = \
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%D%/system/nss.scm \
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%D%/system/pam.scm \
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%D%/system/shadow.scm \
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%D%/system/uuid.scm \
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%D%/system/vm.scm \
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\
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%D%/build/activation.scm \
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@ -20,9 +20,10 @@
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#:use-module (ice-9 match)
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#:use-module (srfi srfi-1)
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#:use-module (guix records)
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#:use-module ((gnu build file-systems)
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#:select (string->uuid uuid->string))
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#:re-export (string->uuid
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#:use-module ((gnu system uuid)
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#:select (uuid string->uuid uuid->string))
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#:re-export (uuid ;backward compatibility
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string->uuid
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uuid->string)
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#:export (<file-system>
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file-system
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@ -44,7 +45,6 @@
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file-system->spec
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spec->file-system
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specification->file-system-mapping
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uuid
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%fuse-control-file-system
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%binary-format-file-system
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@ -186,20 +186,6 @@ TARGET in the other system."
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(target spec)
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(writable? writable?)))))
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(define-syntax uuid
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(lambda (s)
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"Return the bytevector corresponding to the given UUID representation."
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(syntax-case s ()
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((_ str)
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(string? (syntax->datum #'str))
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;; A literal string: do the conversion at expansion time.
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(let ((bv (string->uuid (syntax->datum #'str))))
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(unless bv
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(syntax-violation 'uuid "invalid UUID" s))
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(datum->syntax #'str bv)))
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((_ str)
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#'(string->uuid str)))))
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;;;
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;;; Common file systems.
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227
gnu/system/uuid.scm
Normal file
227
gnu/system/uuid.scm
Normal file
@ -0,0 +1,227 @@
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;;; GNU Guix --- Functional package management for GNU
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;;; Copyright © 2016, 2017 Ludovic Courtès <ludo@gnu.org>
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;;; Copyright © 2017 Danny Milosavljevic <dannym@scratchpost.org>
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;;;
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;;; This file is part of GNU Guix.
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;;;
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;;; GNU Guix is free software; you can redistribute it and/or modify it
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;;; under the terms of the GNU General Public License as published by
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;;; the Free Software Foundation; either version 3 of the License, or (at
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;;; your option) any later version.
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;;;
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;;; GNU Guix is distributed in the hope that it will be useful, but
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;;; WITHOUT ANY WARRANTY; without even the implied warranty of
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;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;;; GNU General Public License for more details.
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;;;
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;;; You should have received a copy of the GNU General Public License
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;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
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(define-module (gnu system uuid)
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#:use-module (srfi srfi-1)
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#:use-module (rnrs bytevectors)
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#:use-module (ice-9 match)
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#:use-module (ice-9 vlist)
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#:use-module (ice-9 regex)
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#:use-module (ice-9 format)
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#:export (uuid
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uuid->string
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dce-uuid->string
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string->uuid
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string->dce-uuid
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string->iso9660-uuid
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string->ext2-uuid
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string->ext3-uuid
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string->ext4-uuid
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string->btrfs-uuid
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iso9660-uuid->string
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;; XXX: For lack of a better place.
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sub-bytevector
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latin1->string))
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;;;
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;;; Tools that lack a better place.
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;;;
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(define (sub-bytevector bv start size)
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"Return a copy of the SIZE bytes of BV starting from offset START."
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(let ((result (make-bytevector size)))
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(bytevector-copy! bv start result 0 size)
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result))
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(define (latin1->string bv terminator)
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"Return a string of BV, a latin1 bytevector, or #f. TERMINATOR is a predicate
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that takes a number and returns #t when a termination character is found."
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(let ((bytes (take-while (negate terminator) (bytevector->u8-list bv))))
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(if (null? bytes)
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#f
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(list->string (map integer->char bytes)))))
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;;;
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;;; DCE UUIDs.
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;;;
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(define-syntax %network-byte-order
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(identifier-syntax (endianness big)))
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(define (dce-uuid->string uuid)
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"Convert UUID, a 16-byte bytevector, to its string representation, something
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like \"6b700d61-5550-48a1-874c-a3d86998990e\"."
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;; See <https://tools.ietf.org/html/rfc4122>.
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(let ((time-low (bytevector-uint-ref uuid 0 %network-byte-order 4))
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(time-mid (bytevector-uint-ref uuid 4 %network-byte-order 2))
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(time-hi (bytevector-uint-ref uuid 6 %network-byte-order 2))
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(clock-seq (bytevector-uint-ref uuid 8 %network-byte-order 2))
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(node (bytevector-uint-ref uuid 10 %network-byte-order 6)))
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(format #f "~8,'0x-~4,'0x-~4,'0x-~4,'0x-~12,'0x"
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time-low time-mid time-hi clock-seq node)))
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(define %uuid-rx
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;; The regexp of a UUID.
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(make-regexp "^([[:xdigit:]]{8})-([[:xdigit:]]{4})-([[:xdigit:]]{4})-([[:xdigit:]]{4})-([[:xdigit:]]{12})$"))
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(define (string->dce-uuid str)
|
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"Parse STR as a DCE UUID (see <https://tools.ietf.org/html/rfc4122>) and
|
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return its contents as a 16-byte bytevector. Return #f if STR is not a valid
|
||||
UUID representation."
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||||
(and=> (regexp-exec %uuid-rx str)
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(lambda (match)
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(letrec-syntax ((hex->number
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(syntax-rules ()
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||||
((_ index)
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||||
(string->number (match:substring match index)
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16))))
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(put!
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(syntax-rules ()
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||||
((_ bv index (number len) rest ...)
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||||
(begin
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||||
(bytevector-uint-set! bv index number
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||||
(endianness big) len)
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||||
(put! bv (+ index len) rest ...)))
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((_ bv index)
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||||
bv))))
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||||
(let ((time-low (hex->number 1))
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(time-mid (hex->number 2))
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(time-hi (hex->number 3))
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(clock-seq (hex->number 4))
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(node (hex->number 5))
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(uuid (make-bytevector 16)))
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(put! uuid 0
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(time-low 4) (time-mid 2) (time-hi 2)
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(clock-seq 2) (node 6)))))))
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||||
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;;;
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||||
;;; ISO-9660.
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||||
;;;
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||||
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||||
;; <http://www.ecma-international.org/publications/files/ECMA-ST/Ecma-119.pdf>.
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||||
|
||||
(define %iso9660-uuid-rx
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;; Y m d H M S ss
|
||||
(make-regexp "^([[:digit:]]{4})-([[:digit:]]{2})-([[:digit:]]{2})-([[:digit:]]{2})-([[:digit:]]{2})-([[:digit:]]{2})-([[:digit:]]{2})$"))
|
||||
(define (string->iso9660-uuid str)
|
||||
"Parse STR as a ISO9660 UUID (which is really a timestamp - see /dev/disk/by-uuid).
|
||||
Return its contents as a 16-byte bytevector. Return #f if STR is not a valid
|
||||
ISO9660 UUID representation."
|
||||
(and=> (regexp-exec %iso9660-uuid-rx str)
|
||||
(lambda (match)
|
||||
(letrec-syntax ((match-numerals
|
||||
(syntax-rules ()
|
||||
((_ index (name rest ...) body)
|
||||
(let ((name (match:substring match index)))
|
||||
(match-numerals (+ 1 index) (rest ...) body)))
|
||||
((_ index () body)
|
||||
body))))
|
||||
(match-numerals 1 (year month day hour minute second hundredths)
|
||||
(string->utf8 (string-append year month day
|
||||
hour minute second hundredths)))))))
|
||||
(define (iso9660-uuid->string uuid)
|
||||
"Given an UUID bytevector, return its timestamp string."
|
||||
(define (digits->string bytes)
|
||||
(latin1->string bytes (lambda (c) #f)))
|
||||
(let* ((year (sub-bytevector uuid 0 4))
|
||||
(month (sub-bytevector uuid 4 2))
|
||||
(day (sub-bytevector uuid 6 2))
|
||||
(hour (sub-bytevector uuid 8 2))
|
||||
(minute (sub-bytevector uuid 10 2))
|
||||
(second (sub-bytevector uuid 12 2))
|
||||
(hundredths (sub-bytevector uuid 14 2))
|
||||
(parts (list year month day hour minute second hundredths)))
|
||||
(string-append (string-join (map digits->string parts) "-"))))
|
||||
|
||||
|
||||
;;;
|
||||
;;; FAT32.
|
||||
;;;
|
||||
|
||||
(define-syntax %fat32-endianness
|
||||
;; Endianness of FAT file systems.
|
||||
(identifier-syntax (endianness little)))
|
||||
|
||||
(define (fat32-uuid->string uuid)
|
||||
"Convert fat32 UUID, a 4-byte bytevector, to its string representation."
|
||||
(let ((high (bytevector-uint-ref uuid 0 %fat32-endianness 2))
|
||||
(low (bytevector-uint-ref uuid 2 %fat32-endianness 2)))
|
||||
(format #f "~:@(~x-~x~)" low high)))
|
||||
|
||||
|
||||
;;;
|
||||
;;; Generic interface.
|
||||
;;;
|
||||
|
||||
(define string->ext2-uuid string->dce-uuid)
|
||||
(define string->ext3-uuid string->dce-uuid)
|
||||
(define string->ext4-uuid string->dce-uuid)
|
||||
(define string->btrfs-uuid string->dce-uuid)
|
||||
|
||||
(define-syntax vhashq
|
||||
(syntax-rules (=>)
|
||||
((_)
|
||||
vlist-null)
|
||||
((_ (key others ... => value) rest ...)
|
||||
(vhash-consq key value
|
||||
(vhashq (others ... => value) rest ...)))
|
||||
((_ (=> value) rest ...)
|
||||
(vhashq rest ...))))
|
||||
|
||||
(define %uuid-parsers
|
||||
(vhashq
|
||||
('dce 'ext2 'ext3 'ext4 'btrfs 'luks => string->dce-uuid)
|
||||
('iso9660 => string->iso9660-uuid)))
|
||||
|
||||
(define %uuid-printers
|
||||
(vhashq
|
||||
('dce 'ext2 'ext3 'ext4 'btrfs 'luks => dce-uuid->string)
|
||||
('iso9660 => iso9660-uuid->string)
|
||||
('fat32 'fat => fat32-uuid->string)))
|
||||
|
||||
(define* (string->uuid str #:key (type 'dce))
|
||||
"Parse STR as a UUID of the given TYPE. On success, return the
|
||||
corresponding bytevector; otherwise return #f."
|
||||
(match (vhash-assq type %uuid-parsers)
|
||||
(#f #f)
|
||||
((_ . (? procedure? parse)) (parse str))))
|
||||
|
||||
(define* (uuid->string bv #:key (type 'dce))
|
||||
"Convert BV, a bytevector, to the UUID string representation for TYPE."
|
||||
(match (vhash-assq type %uuid-printers)
|
||||
(#f #f)
|
||||
((_ . (? procedure? unparse)) (unparse bv))))
|
||||
|
||||
(define-syntax uuid
|
||||
(lambda (s)
|
||||
"Return the bytevector corresponding to the given UUID representation."
|
||||
(syntax-case s ()
|
||||
((_ str)
|
||||
(string? (syntax->datum #'str))
|
||||
;; A literal string: do the conversion at expansion time.
|
||||
(let ((bv (string->uuid (syntax->datum #'str))))
|
||||
(unless bv
|
||||
(syntax-violation 'uuid "invalid UUID" s))
|
||||
(datum->syntax #'str bv)))
|
||||
((_ str)
|
||||
#'(string->uuid str)))))
|
||||
Loading…
Reference in New Issue
Block a user