diff options
| -rw-r--r-- | doc/guix.texi | 29 | ||||
| -rw-r--r-- | gnu/local.mk | 1 | ||||
| -rw-r--r-- | gnu/services/sysctl.scm | 77 |
3 files changed, 107 insertions, 0 deletions
diff --git a/doc/guix.texi b/doc/guix.texi index 17492bfe59..eab1704d4d 100644 --- a/doc/guix.texi +++ b/doc/guix.texi @@ -15276,6 +15276,35 @@ Package object of thermald. @node Miscellaneous Services @subsubsection Miscellaneous Services +@cindex sysctl +@subsubheading System Control Service + +The @code{(gnu services sysctl)} provides a service to configure kernel +parameters at boot. + +@defvr {Scheme Variable} sysctl-service-type +The service type for @command{sysctl}, which modifies kernel parameters +under @file{/proc/sys/}. To enable IPv4 forwarding, it can be +instantiated as: + +@example +(service sysctl-service-type + (sysctl-configuration + (settings '(("net.ipv4.ip_forward" . "1"))))) +@end example +@end defvr + +@deftp {Data Type} sysctl-configuration +The data type representing the configuration of @command{sysctl}. + +@table @asis +@item @code{sysctl} (default: @code{(file-append procps "/sbin/sysctl"}) +The @command{sysctl} executable to use. + +@item @code{settings} (default: @code{'()}) +An association list specifies kernel parameters and their values. +@end table +@end deftp @cindex lirc @subsubheading Lirc Service diff --git a/gnu/local.mk b/gnu/local.mk index 3b68a4d48c..f9f18ec308 100644 --- a/gnu/local.mk +++ b/gnu/local.mk @@ -444,6 +444,7 @@ GNU_SYSTEM_MODULES = \ %D%/services/sddm.scm \ %D%/services/spice.scm \ %D%/services/ssh.scm \ + %D%/services/sysctl.scm \ %D%/services/version-control.scm \ %D%/services/vpn.scm \ %D%/services/web.scm \ diff --git a/gnu/services/sysctl.scm b/gnu/services/sysctl.scm new file mode 100644 index 0000000000..be5be59a05 --- /dev/null +++ b/gnu/services/sysctl.scm @@ -0,0 +1,77 @@ +;;; GNU Guix --- Functional package management for GNU +;;; Copyright © 2017 Sou Bunnbu <iyzsong@member.fsf.org> +;;; +;;; This file is part of GNU Guix. +;;; +;;; GNU Guix is free software; you can redistribute it and/or modify it +;;; under the terms of the GNU General Public License as published by +;;; the Free Software Foundation; either version 3 of the License, or (at +;;; your option) any later version. +;;; +;;; GNU Guix is distributed in the hope that it will be useful, but +;;; WITHOUT ANY WARRANTY; without even the implied warranty of +;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +;;; GNU General Public License for more details. +;;; +;;; You should have received a copy of the GNU General Public License +;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>. + +(define-module (gnu services sysctl) + #:use-module (gnu services) + #:use-module (gnu services shepherd) + #:use-module (gnu packages linux) + #:use-module (guix gexp) + #:use-module (guix records) + #:use-module (srfi srfi-1) + #:use-module (ice-9 match) + #:export (sysctl-configuration + sysctl-service-type)) + + +;;; +;;; System Control Service. +;;; + +(define-record-type* <sysctl-configuration> + sysctl-configuration make-sysctl-configuration? + sysctl-configuration? + (sysctl sysctl-configuration-sysctl ; path of the 'sysctl' command + (default (file-append procps "/sbin/sysctl"))) + (settings sysctl-configuration-settings ; alist of string pairs + (default '()))) + +(define (sysctl-configuration-settings->sysctl.conf settings) + "Return a file for @command{sysctl} to set kernel parameters as specified by +@var{settings}." + (apply mixed-text-file "sysctl.conf" + (append-map (match-lambda + ((key . value) + (list key "=" value "\n"))) + settings))) + +(define sysctl-shepherd-service + (match-lambda + (($ <sysctl-configuration> sysctl settings) + (let ((sysctl.conf + (sysctl-configuration-settings->sysctl.conf settings))) + (shepherd-service + (documentation "Configure kernel parameters at boot.") + (provision '(sysctl)) + (start #~(lambda _ + (zero? (system* #$sysctl "--load" #$sysctl.conf)))) + (stop #~(const #t)) + (respawn? #f)))))) + +(define sysctl-service-type + (service-type + (name 'sysctl) + (extensions + (list (service-extension shepherd-root-service-type + (compose list sysctl-shepherd-service)))) + (compose concatenate) + (extend (lambda (config settings) + (sysctl-configuration + (inherit config) + (settings (append (sysctl-configuration-settings config) + settings))))) + (default-value (sysctl-configuration)))) |