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;;; Whispers --- Stealth VPN and ssh tunneler
;;; Copyright © 2024 Runciter <runciter@whispers-vpn.org>
;;;
;;; This file is part of Whispers.
;;;
;;; Whispers 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.
;;;
;;; Whispers 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 Whispers. If not, see <http://www.gnu.org/licenses/>.
(define-module (whispers services console)
#:use-module (guix gexp)
#:use-module (guix records)
#:use-module (gnu services)
#:use-module (gnu services shepherd)
#:use-module (gnu packages linux)
#:export (console-blank-configuration
console-blank-configuration?
make-console-blank-configuration
this-console-blank-configuration
console-blank-service-type))
(define-record-type* <console-blank-configuration>
console-blank-configuration make-console-blank-configuration
console-blank-configuration?
this-console-blank-configuration
;; A file-like object
(util-linux-package console-blank-configuration-util-linux-package
(default util-linux))
;; An integer
(blank-time console-blank-configuration-blank-time
(default 10))
;; An integer
(powerdown-time console-blank-configuration-powerdown-time
(default 10)))
(define (console-blank-shepherd-services config)
"Return a list of one shepherd services setting up Linux console screen
blanking and powerdown times, configurable by CONFIG, a record of the
<console-blank-configuration> type."
(let ((util-linux (console-blank-configuration-util-linux-package config))
(blank (number->string
(console-blank-configuration-blank-time config)))
(powerdown (number->string
(console-blank-configuration-powerdown-time config))))
(list
(shepherd-service
(documentation "Setup Linux console screen blanking and powerdown.")
(provision (list 'console-blank))
;; Start after mingetty has been started on tty1
(requirement (list 'term-tty1 'console-font-tty1))
(start #~(lambda _
(case (status:exit-val
(system
(string-append #$(file-append util-linux
"/bin/setterm")
" --blank="
#$blank
" --powerdown="
#$powerdown
" </dev/tty1 >/dev/tty1")))
((0) #t)
(else #f))))
(stop #~(const #f))
(respawn? #f)))))
(define console-blank-service-type
(service-type
(name 'console-blank)
(description "Setup screen blanking and powerdown on the Linux console")
(extensions
(list (service-extension shepherd-root-service-type
console-blank-shepherd-services)
(service-extension
profile-service-type
(lambda (config)
(list
(console-blank-configuration-util-linux-package config))))))
(default-value (console-blank-configuration))))
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