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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))))