;;; 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))))
option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Jelle Licht &lt;jlicht@fsfe.org&gt;</td><td class='right'>2024-11-03 13:04:04 +0100</td></tr>
<tr><th>committer</th><td>Jelle Licht &lt;jlicht@fsfe.org&gt;</td><td class='right'>2024-12-18 22:02:20 +0100</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/guix/commit/gnu/packages/guile.scm?id=3602ccfcd39dd87dc2dc4b90610d8447e86ec8db'>3602ccfcd39dd87dc2dc4b90610d8447e86ec8db</a> (<a href='/guix/patch/gnu/packages/guile.scm?id=3602ccfcd39dd87dc2dc4b90610d8447e86ec8db'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/guix/tree/?id=3602ccfcd39dd87dc2dc4b90610d8447e86ec8db'>eca80820766d00b403ac7df462a6ec46ec7d5079</a> /<a href='/guix/tree/gnu/packages/guile.scm?id=3602ccfcd39dd87dc2dc4b90610d8447e86ec8db'>gnu/packages/guile.scm</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/guix/commit/gnu/packages/guile.scm?id=10796c9706d83355588a7c904ecd9bea57403f2c'>10796c9706d83355588a7c904ecd9bea57403f2c</a> (<a href='/guix/diff/gnu/packages/guile.scm?id=3602ccfcd39dd87dc2dc4b90610d8447e86ec8db&amp;id2=10796c9706d83355588a7c904ecd9bea57403f2c'>diff</a>)</td></tr><tr><th>download</th><td colspan='2' class='oid'><a href='/guix/snapshot/guix-3602ccfcd39dd87dc2dc4b90610d8447e86ec8db.tar.gz'>guix-3602ccfcd39dd87dc2dc4b90610d8447e86ec8db.tar.gz</a><br/><a href='/guix/snapshot/guix-3602ccfcd39dd87dc2dc4b90610d8447e86ec8db.zip'>guix-3602ccfcd39dd87dc2dc4b90610d8447e86ec8db.zip</a><br/></td></tr></table>
<div class='commit-subject'>gnu: ruby-execjs: Use node-lts instead of node.</div><div class='commit-msg'>* gnu/packages/ruby.scm (ruby-execjs)[native-inputs]: Replace node by
node-lts.

Change-Id: If7ff42d9865d79c23560fb190db4fdce9ecc621c
</div><div class='diffstat-header'><a href='/guix/diff/?id=3602ccfcd39dd87dc2dc4b90610d8447e86ec8db'>Diffstat</a> (limited to 'gnu/packages/guile.scm')</div><table summary='diffstat' class='diffstat'></table><div class='diffstat-summary'>0 files changed, 0 insertions, 0 deletions</div><table summary='diff' class='diff'><tr><td></td></tr></table></div> <!-- class=content -->
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