gnu/bootloader/extlinux.scm

   1 ;;; GNU Guix --- Functional package management for GNU
   2 ;;; Copyright © 2017 David Craven <david@craven.ch>
   3 ;;; Copyright © 2017 Mathieu Othacehe <m.othacehe@gmail.com>
   4 ;;;
   5 ;;; This file is part of GNU Guix.
   6 ;;;
   7 ;;; GNU Guix is free software; you can redistribute it and/or modify it
   8 ;;; under the terms of the GNU General Public License as published by
   9 ;;; the Free Software Foundation; either version 3 of the License, or (at
  10 ;;; your option) any later version.
  11 ;;;
  12 ;;; GNU Guix is distributed in the hope that it will be useful, but
  13 ;;; WITHOUT ANY WARRANTY; without even the implied warranty of
  14 ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 ;;; GNU General Public License for more details.
  16 ;;;
  17 ;;; You should have received a copy of the GNU General Public License
  18 ;;; along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.
  19
  20 (define-module (gnu bootloader extlinux)
  21   #:use-module (gnu bootloader)
  22   #:use-module (gnu system)
  23   #:use-module (gnu packages bootloaders)
  24   #:use-module (guix gexp)
  25   #:use-module (guix monads)
  26   #:use-module (guix records)
  27   #:use-module (guix utils)
  28   #:export (extlinux-bootloader
  29             syslinux-bootloader
  30
  31             extlinux-configuration
  32             syslinux-configuration))
  33
  34 (define* (extlinux-configuration-file config entries
  35                                       #:key
  36                                       (system (%current-system))
  37                                       (old-entries '()))
  38   "Return the U-Boot configuration file corresponding to CONFIG, a
  39 <u-boot-configuration> object, and where the store is available at STORE-FS, a
  40 <file-system> object.  OLD-ENTRIES is taken to be a list of menu entries
  41 corresponding to old generations of the system."
  42
  43   (define all-entries
  44     (append entries (bootloader-configuration-menu-entries config)))
  45
  46   (define (boot-parameters->gexp params)
  47     (let ((label (boot-parameters-label params))
  48           (kernel (boot-parameters-kernel params))
  49           (kernel-arguments (boot-parameters-kernel-arguments params))
  50           (initrd (boot-parameters-initrd params)))
  51       #~(format port "LABEL ~a
  52   MENU LABEL ~a
  53   KERNEL ~a
  54   FDTDIR ~a/lib/dtbs
  55   INITRD ~a
  56   APPEND ~a
  57 ~%"
  58                 #$label #$label
  59                 #$kernel #$kernel #$initrd
  60                 (string-join (list #$@kernel-arguments)))))
  61
  62   (define builder
  63     #~(call-with-output-file #$output
  64         (lambda (port)
  65           (let ((timeout #$(bootloader-configuration-timeout config)))
  66             (format port "
  67 UI menu.c32
  68 PROMPT ~a
  69 TIMEOUT ~a~%"
  70                     (if (> timeout 0) 1 0)
  71                     ;; timeout is expressed in 1/10s of seconds.
  72                     (* 10 timeout))
  73             #$@(map boot-parameters->gexp all-entries)
  74
  75             #$@(if (pair? old-entries)
  76                    #~((format port "~%")
  77                       #$@(map boot-parameters->gexp old-entries)
  78                       (format port "~%"))
  79                    #~())))))
  80
  81   (gexp->derivation "extlinux.conf" builder))
  82
  83
  84 \f
  85
  86 ;;;
  87 ;;; Install procedures.
  88 ;;;
  89
  90 (define dd
  91   #~(lambda (bs count if of)
  92       (zero? (system* "dd"
  93                       (string-append "bs=" (number->string bs))
  94                       (string-append "count=" (number->string count))
  95                       (string-append "if=" if)
  96                       (string-append "of=" of)))))
  97
  98 (define install-extlinux
  99   #~(lambda (bootloader device mount-point)
 100       (let ((extlinux (string-append bootloader "/sbin/extlinux"))
 101             (install-dir (string-append mount-point "/boot/extlinux"))
 102             (syslinux-dir (string-append bootloader "/share/syslinux")))
 103         (for-each (lambda (file)
 104                     (install-file file install-dir))
 105                   (find-files syslinux-dir "\\.c32$"))
 106
 107         (unless (and (zero? (system* extlinux "--install" install-dir))
 108                      (#$dd 440 1 (string-append syslinux-dir "/mbr.bin") device))
 109           (error "failed to install SYSLINUX")))))
 110
 111 \f
 112
 113 ;;;
 114 ;;; Bootloader definitions.
 115 ;;;
 116
 117 (define extlinux-bootloader
 118   (bootloader
 119    (name 'extlinux)
 120    (package syslinux)
 121    (installer install-extlinux)
 122    (configuration-file "/boot/extlinux/extlinux.conf")
 123    (configuration-file-generator extlinux-configuration-file)))