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system: Introduce read-boot-parameters-file.

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* gnu/system.scm (read-boot-parameters): Remove export.
(read-boot-parameters-file): New variable. Export it.
* guix/scripts/system.scm (profile-boot-parameters): Use
read-boot-parameters-file.
(profile-grub-entries): Use read-boot-parameters-file.
(reinstall-grub): Use read-boot-parameters-file.
(display-system-generation): Use read-boot-parameters-file.
This commit is contained in:
Danny Milosavljevic 2017-04-21 14:37:09 +02:00
parent 33f0aa8815
commit 9530e73b49
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GPG key ID: E71A35542C30BAA5
2 changed files with 25 additions and 11 deletions
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22
gnu/system.scm
View file

@ -109,7 +109,7 @@ (define-module (gnu system)
boot-parameters-kernel
boot-parameters-kernel-arguments
boot-parameters-initrd
read-boot-parameters
read-boot-parameters-file
local-host-aliases
%setuid-programs
@ -907,4 +907,24 @@ (define (read-boot-parameters port)
system)
#f)))
(define (read-boot-parameters-file system)
"Read boot parameters from SYSTEM's (system or generation) \"parameters\"
file and returns the corresponding <boot-parameters> object or #f if the
format is unrecognized.
The object has its kernel-arguments extended in order to make it bootable."
(let* ((file (string-append system "/parameters"))
(params (call-with-input-file file read-boot-parameters))
(root (boot-parameters-root-device params))
(root-device (if (bytevector? root)
(uuid->string root)
root))
(kernel-arguments (boot-parameters-kernel-arguments params)))
(if params
(boot-parameters
(inherit params)
(kernel-arguments (bootable-kernel-arguments kernel-arguments
system
root-device)))
#f)))
;;; system.scm ends here

14
guix/scripts/system.scm
View file

@ -369,9 +369,7 @@ (define* (profile-boot-parameters #:optional (profile %system-profile)
NUMBERS, which is a list of generation numbers."
(define (system->boot-parameters system number time)
(unless-file-not-found
(let* ((file (string-append system "/parameters"))
(params (call-with-input-file file
read-boot-parameters)))
(let* ((params (read-boot-parameters-file system)))
params)))
(let* ((systems (map (cut generation-file-name profile <>)
numbers))
@ -387,9 +385,7 @@ (define* (profile-grub-entries #:optional (profile %system-profile)
NUMBERS, which is a list of generation numbers."
(define (system->grub-entry system number time)
(unless-file-not-found
(let* ((file (string-append system "/parameters"))
(params (call-with-input-file file
read-boot-parameters))
(let* ((params (read-boot-parameters-file system))
(label (boot-parameters-label params))
(root (boot-parameters-root-device params))
(root-device (if (bytevector? root)
@ -447,9 +443,8 @@ (define (reinstall-grub store number)
"Re-install grub for existing system profile generation NUMBER. STORE is an
open connection to the store."
(let* ((generation (generation-file-name %system-profile number))
(file (string-append generation "/parameters"))
(params (unless-file-not-found
(call-with-input-file file read-boot-parameters)))
(read-boot-parameters-file generation)))
(root-device (boot-parameters-root-device params))
;; We don't currently keep track of past menu entries' details. The
;; default values will allow the system to boot, even if they differ
@ -533,8 +528,7 @@ (define* (display-system-generation number
"Display a summary of system generation NUMBER in a human-readable format."
(unless (zero? number)
(let* ((generation (generation-file-name profile number))
(param-file (string-append generation "/parameters"))
(params (call-with-input-file param-file read-boot-parameters))
(params (read-boot-parameters-file generation))
(label (boot-parameters-label params))
(root (boot-parameters-root-device params))
(root-device (if (bytevector? root)