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gnu: linux-initrd: Factorize device node creation.

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* guix/build/linux-initrd.scm (make-essential-device-nodes): New
  procedure.
* gnu/packages/linux-initrd.scm (qemu-initrd): Use it.
This commit is contained in:
Ludovic Courtès 2013-09-01 23:13:56 +02:00
parent d9ff410fb2
commit d91712ee89
2 changed files with 35 additions and 6 deletions
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9
gnu/packages/linux-initrd.scm
View file

@ -270,10 +270,8 @@ (define-public qemu-initrd
(unless (configure-qemu-networking)
(display "network interface is DOWN\n"))
;; Make the device nodes for QEMU's hard disk and partitions.
(mknod "/dev/vda" 'block-special #o644 (device-number 8 0))
(mknod "/dev/vda1" 'block-special #o644 (device-number 8 1))
(mknod "/dev/vda2" 'block-special #o644 (device-number 8 2))
;; Make /dev nodes.
(make-essential-device-nodes)
;; Prepare the real root file system under /root.
(unless (file-exists? "/root")
@ -287,8 +285,7 @@ (define-public qemu-initrd
(mkdir-p "/root/nix/store")
(mkdir "/root/dev")
(mknod "/root/dev/null" 'char-special #o666 (device-number 1 3))
(mknod "/root/dev/zero" 'char-special #o666 (device-number 1 5))
(make-essential-device-nodes #:root "/root/dev")
;; Mount the host's store and exchange directory.
(mount-qemu-smb-share "/store" "/root/nix/store")

32
guix/build/linux-initrd.scm
View file

@ -21,6 +21,7 @@ (define-module (guix build linux-initrd)
#:use-module (system foreign)
#:export (mount-essential-file-systems
linux-command-line
make-essential-device-nodes
configure-qemu-networking
mount-qemu-smb-share
bind-mount
@ -59,6 +60,37 @@ (define (linux-command-line)
(call-with-input-file "/proc/cmdline"
get-string-all)))
(define* (make-essential-device-nodes #:key (root "/"))
"Make essential device nodes under ROOT/dev."
;; The hand-made udev!
(define (scope dir)
(string-append root
(if (string-suffix? "/" root)
""
"/")
dir))
(unless (file-exists? (scope "dev"))
(mkdir (scope "dev")))
;; Make the device nodes for QEMU's hard disk and partitions.
(mknod (scope "dev/vda") 'block-special #o644 (device-number 8 0))
(mknod (scope "dev/vda1") 'block-special #o644 (device-number 8 1))
(mknod (scope "dev/vda2") 'block-special #o644 (device-number 8 2))
;; TTYs.
(let loop ((n 0))
(and (< n 50)
(let ((name (format #f "dev/tty~a" n)))
(mknod (scope name) 'block-special #o644
(device-number 4 n))
(loop (+ 1 n)))))
;; Other useful nodes.
(mknod (scope "dev/null") 'char-special #o666 (device-number 1 3))
(mknod (scope "dev/zero") 'char-special #o666 (device-number 1 5)))
(define %host-qemu-ipv4-address
(inet-pton AF_INET "10.0.2.10"))