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services: Add rngd-service.

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* gnu/services/base.scm (<rngd-configuration>): New record type.
(rngd-service-type): New variable.
(rngd-service): New procedure.
* doc/guix.texi (Base Services): Document it.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>
This commit is contained in:
David Craven 2016-07-03 20:25:09 +02:00 committed by Ludovic Courtès
parent cf91cfc0c4
commit b58cbf9ac5
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2 changed files with 52 additions and 2 deletions
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7
doc/guix.texi
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@ -7494,6 +7494,13 @@ created by @command{guix archive --generate-key} (@pxref{Invoking guix
archive}). If that is not the case, the service will fail to start.
@end deffn
@anchor{rngd-service}
@deffn {Scheme Procedure} rngd-service [#:rng-tools @var{rng-tools}] @
[#:device "/dev/hwrng"]
Return a service that runs the @command{rngd} program from @var{rng-tools}
to add @var{device} to the kernel's entropy pool. The service will fail if
@var{device} does not exist.
@end deffn
@node Scheduled Job Execution
@subsubsection Scheduled Job Execution

47
gnu/services/base.scm
View file

@ -4,6 +4,7 @@
;;; Copyright © 2015 Mark H Weaver <mhw@netris.org>
;;; Copyright © 2015 Sou Bunnbu <iyzsong@gmail.com>
;;; Copyright © 2016 Leo Famulari <leo@famulari.name>
;;; Copyright © 2016 David Craven <david@craven.ch>
;;;
;;; This file is part of GNU Guix.
;;;
@ -31,7 +32,7 @@ (define-module (gnu services base)
#:use-module (gnu system mapped-devices)
#:use-module (gnu packages admin)
#:use-module ((gnu packages linux)
#:select (eudev kbd e2fsprogs lvm2 fuse alsa-utils crda gpm))
#:select (alsa-utils crda eudev e2fsprogs fuse gpm kbd lvm2 rng-tools))
#:use-module ((gnu packages base)
#:select (canonical-package glibc))
#:use-module (gnu packages package-management)
@ -97,6 +98,8 @@ (define-module (gnu services base)
urandom-seed-service-type
urandom-seed-service
rngd-service-type
rngd-service
%base-services))
@ -486,7 +489,47 @@ (define urandom-seed-service-type
(define (urandom-seed-service)
(service urandom-seed-service-type #f))
;;;
;;; Add hardware random number generator to entropy pool.
;;;
(define-record-type* <rngd-configuration>
rngd-configuration make-rngd-configuration
rngd-configuration?
(rng-tools rngd-configuration-rng-tools) ;package
(device rngd-configuration-device)) ;string
(define rngd-service-type
(shepherd-service-type
'rngd
(lambda (config)
(define rng-tools (rngd-configuration-rng-tools config))
(define device (rngd-configuration-device config))
(define rngd-command
(list #~(string-append #$rng-tools "/sbin/rngd")
"-f" "-r" device))
(shepherd-service
(documentation "Add TRNG to entropy pool.")
(requirement '(udev))
(provision '(trng))
(start #~(make-forkexec-constructor #$@rngd-command))
(stop #~(make-kill-destructor))))))
(define* (rngd-service #:key
(rng-tools rng-tools)
(device "/dev/hwrng"))
"Return a service that runs the @command{rngd} program from @var{rng-tools}
to add @var{device} to the kernel's entropy pool. The service will fail if
@var{device} does not exist."
(service rngd-service-type
(rngd-configuration
(rng-tools rng-tools)
(device device))))
;;;
;;; System-wide environment variables.
;;;