me
/
guix
Archived
1
0
Fork 0
This repository has been archived on 2024-08-07. You can view files and clone it, but cannot push or open issues/pull-requests.
guix/gnu/services/sysctl.scm

87 lines
3.1 KiB
Scheme
Raw Blame History

This file contains invisible Unicode characters!

This file contains invisible Unicode characters that may be processed differently from what appears below. If your use case is intentional and legitimate, you can safely ignore this warning. Use the Escape button to reveal hidden characters.

;;; 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-configuration-sysctl
sysctl-configuration-settings
sysctl-service-type
%default-sysctl-settings))
;;;
;;; System Control Service.
;;;
(define %default-sysctl-settings
;; Default kernel parameters enabled with sysctl.
'(("fs.protected_hardlinks" . "1")
("fs.protected_symlinks" . "1")))
(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 %default-sysctl-settings)))
(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))))
(one-shot? #t))))))
(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))
(description "Set Linux kernel parameters under @file{/proc/sys} at system
startup time.")))