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| | ;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2024 Fabio Natali <me@fabionatali.com>
;;;
;;; 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 upnp)
#:use-module (gnu build linux-container)
#:use-module (gnu packages admin)
#:use-module (gnu packages upnp)
#:use-module (gnu services admin)
#:use-module (gnu services base)
#:use-module (gnu services shepherd)
#:use-module (gnu services)
#:use-module (gnu system file-systems)
#:use-module (gnu system shadow)
#:use-module (guix gexp)
#:use-module (guix least-authority)
#:use-module (guix records)
#:use-module (ice-9 match)
#:export (%readymedia-default-cache-directory
%readymedia-default-log-directory
%readymedia-default-port
%readymedia-log-file
%readymedia-user-account
%readymedia-user-group
readymedia-configuration
readymedia-configuration-cache-directory
readymedia-configuration-extra-config
readymedia-configuration-friendly-name
readymedia-configuration-log-directory
readymedia-configuration-media-directories
readymedia-configuration-port
readymedia-configuration-readymedia
readymedia-configuration?
readymedia-media-directory
readymedia-media-directory-path
readymedia-media-directory-types
readymedia-media-directory?
readymedia-service-type))
;;; Commentary:
;;;
;;; UPnP services.
;;;
;;; Code:
(define %readymedia-default-cache-directory "/var/cache/readymedia")
(define %readymedia-default-log-directory "/var/log/readymedia")
(define %readymedia-log-file "minidlna.log")
(define %readymedia-user-group "readymedia")
(define %readymedia-user-account "readymedia")
(define-record-type* <readymedia-configuration>
readymedia-configuration make-readymedia-configuration
readymedia-configuration?
(readymedia readymedia-configuration-readymedia
(default readymedia))
(cache-directory readymedia-configuration-cache-directory
(default %readymedia-default-cache-directory))
(log-directory readymedia-configuration-log-directory
(default %readymedia-default-log-directory))
(friendly-name readymedia-configuration-friendly-name
(default #f))
(media-directories readymedia-configuration-media-directories)
(port readymedia-configuration-port
(default #f))
(extra-config readymedia-configuration-extra-config
(default '())))
;; READYMEDIA-MEDIA-DIR is a record that indicates the path of a media folder
;; and the types of media included within it. Allowed individual types are the
;; symbols 'A' for audio, 'V' for video, and 'P' for pictures. The types field
;; can contain any combination of individual types; an empty list means no type
;; specified.
(define-record-type* <readymedia-media-directory>
readymedia-media-directory make-readymedia-media-directory
readymedia-media-directory?
(path readymedia-media-directory-path)
(types readymedia-media-directory-types (default '())))
(define (readymedia-media-directory->string entry)
"Convert a media-directory ENTRY to a ReadyMedia/MiniDLNA media dir string."
(match-record
entry <readymedia-media-directory> (path types)
(if (null? types)
(format #f "media_dir=~a" path)
(format #f
"media_dir=~a,~a"
(string-join (map symbol->string types) "")
path))))
(define (readymedia-extra-config-entry->string entry)
"Convert a extra-config ENTRY to a ReadyMedia/MiniDLNA configuration string."
(let ((key (car entry))
(value (cdr entry)))
(format #f "~a=~a" key value)))
(define (readymedia-configuration->config-file config)
"Return the ReadyMedia/MiniDLNA configuration file corresponding to CONFIG."
(let ((friendly-name (readymedia-configuration-friendly-name config))
(media-directories (readymedia-configuration-media-directories config))
(cache-directory (readymedia-configuration-cache-directory config))
(log-directory (readymedia-configuration-log-directory config))
(port (readymedia-configuration-port config))
(extra-config (readymedia-configuration-extra-config config)))
(mixed-text-file
"minidlna.conf"
"db_dir=" cache-directory "\n"
"log_dir=" log-directory "\n"
(if friendly-name (format #f "friendly_name=~a\n" friendly-name) "")
(if port (format #f "port=~a\n" port) "")
(string-join
(map readymedia-media-directory->string media-directories) "\n" 'suffix)
(string-join
(map readymedia-extra-config-entry->string extra-config) "\n" 'suffix))))
(define (readymedia-shepherd-service config)
"Return a least-authority ReadyMedia/MiniDLNA Shepherd service."
(let* ((minidlna-conf (readymedia-configuration->config-file config))
(media-directories (readymedia-configuration-media-directories config))
(cache-directory (readymedia-configuration-cache-directory config))
(log-directory (readymedia-configuration-log-directory config))
(log-file (string-append log-directory "/" %readymedia-log-file))
(readymedia (least-authority-wrapper
(file-append
(readymedia-configuration-readymedia config)
"/sbin/minidlnad")
#:name "minidlna"
#:mappings
(cons* (file-system-mapping
(source cache-directory)
(target source)
(writable? #t))
(file-system-mapping
(source log-directory)
(target source)
(writable? #t))
(file-system-mapping
(source minidlna-conf)
(target source))
(map
(lambda (e)
(file-system-mapping
(source (readymedia-media-directory-path e))
(target source)
(writable? #f)))
media-directories))
#:namespaces (delq 'net %namespaces))))
(list (shepherd-service
(documentation "Run the ReadyMedia/MiniDLNA daemon.")
(provision '(readymedia))
(requirement '(networking user-processes))
(start
#~(make-forkexec-constructor
;; "-S" is to daemonise minidlnad.
(list #$readymedia "-f" #$minidlna-conf "-S")
#:log-file #$log-file
#:user #$%readymedia-user-account
#:group #$%readymedia-user-group))
(stop #~(make-kill-destructor))))))
(define readymedia-accounts
(list (user-group
(name "readymedia")
(system? #t))
(user-account
(name "readymedia")
(group "readymedia")
(system? #t)
(comment "ReadyMedia/MiniDLNA daemon user")
(home-directory "/var/empty")
(shell (file-append shadow "/sbin/nologin")))))
(define (readymedia-activation config)
"Set up directories for ReadyMedia/MiniDLNA."
(let ((cache-directory (readymedia-configuration-cache-directory config))
(log-directory (readymedia-configuration-log-directory config))
(media-directories (readymedia-configuration-media-directories config)))
#~(begin
(use-modules (guix build utils))
(let* ((user (getpw #$%readymedia-user-account))
(dirs (list #$cache-directory
#$log-directory
#$@(map (lambda (e)
(readymedia-media-directory-path e))
media-directories)))
(init-directory (lambda (d) (unless (file-exists? d)
(mkdir-p/perms d user #o755)))))
(for-each init-directory dirs)))))
(define readymedia-service-type
(service-type
(name 'readymedia)
(extensions
(list
(service-extension shepherd-root-service-type readymedia-shepherd-service)
(service-extension account-service-type (const readymedia-accounts))
(service-extension activation-service-type readymedia-activation)))
(description
"Run @command{minidlnad}, the ReadyMedia/MiniDLNA media server.")))
|