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1 | ;;; GNU Guix --- Functional package management for GNU |
2 | ;;; Copyright © 2017 Sou Bunnbu <iyzsong@member.fsf.org> | |
3 | ;;; | |
4 | ;;; This file is part of GNU Guix. | |
5 | ;;; | |
6 | ;;; GNU Guix is free software; you can redistribute it and/or modify it | |
7 | ;;; under the terms of the GNU General Public License as published by | |
8 | ;;; the Free Software Foundation; either version 3 of the License, or (at | |
9 | ;;; your option) any later version. | |
10 | ;;; | |
11 | ;;; GNU Guix is distributed in the hope that it will be useful, but | |
12 | ;;; WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | ;;; GNU General Public License for more details. | |
15 | ;;; | |
16 | ;;; You should have received a copy of the GNU General Public License | |
17 | ;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>. | |
18 | ||
19 | (define-module (gnu services sysctl) | |
20 | #:use-module (gnu services) | |
21 | #:use-module (gnu services shepherd) | |
22 | #:use-module (gnu packages linux) | |
23 | #:use-module (guix gexp) | |
24 | #:use-module (guix records) | |
25 | #:use-module (srfi srfi-1) | |
26 | #:use-module (ice-9 match) | |
27 | #:export (sysctl-configuration | |
28 | sysctl-service-type)) | |
29 | ||
30 | \f | |
31 | ;;; | |
32 | ;;; System Control Service. | |
33 | ;;; | |
34 | ||
35 | (define-record-type* <sysctl-configuration> | |
172b3e2c | 36 | sysctl-configuration make-sysctl-configuration |
296bf4d5 SB |
37 | sysctl-configuration? |
38 | (sysctl sysctl-configuration-sysctl ; path of the 'sysctl' command | |
39 | (default (file-append procps "/sbin/sysctl"))) | |
40 | (settings sysctl-configuration-settings ; alist of string pairs | |
41 | (default '()))) | |
42 | ||
43 | (define (sysctl-configuration-settings->sysctl.conf settings) | |
44 | "Return a file for @command{sysctl} to set kernel parameters as specified by | |
45 | @var{settings}." | |
46 | (apply mixed-text-file "sysctl.conf" | |
47 | (append-map (match-lambda | |
48 | ((key . value) | |
49 | (list key "=" value "\n"))) | |
50 | settings))) | |
51 | ||
52 | (define sysctl-shepherd-service | |
53 | (match-lambda | |
54 | (($ <sysctl-configuration> sysctl settings) | |
55 | (let ((sysctl.conf | |
56 | (sysctl-configuration-settings->sysctl.conf settings))) | |
57 | (shepherd-service | |
58 | (documentation "Configure kernel parameters at boot.") | |
59 | (provision '(sysctl)) | |
60 | (start #~(lambda _ | |
61 | (zero? (system* #$sysctl "--load" #$sysctl.conf)))) | |
77ed06a8 | 62 | (one-shot? #t)))))) |
296bf4d5 SB |
63 | |
64 | (define sysctl-service-type | |
65 | (service-type | |
66 | (name 'sysctl) | |
67 | (extensions | |
68 | (list (service-extension shepherd-root-service-type | |
69 | (compose list sysctl-shepherd-service)))) | |
70 | (compose concatenate) | |
71 | (extend (lambda (config settings) | |
72 | (sysctl-configuration | |
73 | (inherit config) | |
74 | (settings (append (sysctl-configuration-settings config) | |
75 | settings))))) | |
76 | (default-value (sysctl-configuration)))) |