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| | (define-module (gnu services lightdm)
#:use-module (guix gexp)
#:use-module (guix records)
#:use-module (gnu system pam)
#:use-module (gnu system shadow)
#:use-module (gnu services)
#:use-module (gnu services dbus)
#:use-module (gnu services desktop)
#:use-module (gnu services shepherd)
#:use-module (gnu services xorg)
#:use-module (gnu packages admin)
#:use-module (gnu packages display-managers)
#:use-module (gnu packages freedesktop)
#:use-module (gnu packages gnome)
#:use-module (gnu packages xorg)
#:export (lightdm-configuration
lightdm-configuration?
lightdm-service-type))
(define (lightdm-pam-service)
"Return a PAM service for @command{lightdm}."
(unix-pam-service
"lightdm"
#:allow-empty-passwords? #t)
;; (pam-service
;; (name "lightdm")
;; (auth
;; (list
;; Block login if they are globally disabled
;; (pam-entry (control "required") (module "pam_nologin.so"))
;; Load environment from /etc/environment and ~/.pam_environment
;; (pam-entry (control "required") (module "pam_env.so"))
;; Use /etc/passwd and /etc/shadow for passwords
;; (pam-entry (control "required") (module "pam_unix.so"))
;; https://wiki.gentoo.org/wiki/LightDM#Unlock_GNOME_Keyring
;; (pam-entry (control "optional") (module "pam_gnome_keyring.so"))
;; ))
;; Check account is active, change password if required
;; (account
;; (list
;; (pam-entry (control "required") (module "pam_unix.so"))))
;; Allow password to be changed
;; (password
;; (list
;; (pam-entry (control "required") (module "pam_unix.so"))))
;; Setup session
;; (session
;; (list
;; (pam-entry (control "required") (module "pam_unix.so"))
;; https://wiki.gentoo.org/wiki/LightDM#Unlock_GNOME_Keyring
;; (pam-entry (control "optional") (module "pam_gnome_keyring.so")
;; (arguments (list "auto_start")))
;; )))
)
(define (lightdm-greeter-pam-service)
"Return a PAM service for @command{lightdm-greeter}}."
(pam-service
(name "lightdm-greeter")
(auth
(list
;; Load environment from /etc/environment and ~/.pam_environment
(pam-entry (control "required") (module "pam_env.so"))
;; Always let the greeter start without authentication
(pam-entry (control "required") (module "pam_permit.so"))))
;; No action required for account management
(account
(list
(pam-entry (control "required") (module "pam_permit.so"))))
;; Can't change password
(password
(list
(pam-entry (control "required") (module "pam_deny.so"))))
;; Setup session
(session
(list
(pam-entry (control "required") (module "pam_unix.so"))
(pam-entry (control "required") (module "pam_env.so"))))))
(define (lightdm-autologin-pam-service)
"Return a PAM service for @command{lightdm-autologin}}."
(pam-service
(name "lightdm-autologin")
(auth
(list
;; Block login if they are globally disabled
(pam-entry (control "required") (module "pam_nologin.so"))
;; Load environment from /etc/environment and ~/.pam_environment
(pam-entry (control "required") (module "pam_env.so"))
;; Allow access without authentication
(pam-entry (control "required") (module "pam_permit.so"))))
;; Stop autologin if account requires action
(account
(list
(pam-entry (control "required") (module "pam_unix.so"))))
;; Can't change password
(password
(list
(pam-entry (control "required") (module "pam_deny.so"))))
;; Setup session
(session
(list
(pam-entry (control "required") (module "pam_unix.so"))))))
(define-record-type* <lightdm-configuration>
lightdm-configuration make-lightdm-configuration
lightdm-configuration?
(lightdm lightdm-configuration-lightdm
(default lightdm))
(user lightdm-configuration-user
(default "lightdm"))
(greeters-directory lightdm-configuration-greeters-directory
(default "/run/current-system/profile/share/xgreeters"))
(sessions-directory lightdm-configuration-sessions-directory
(default (string-append
"/run/current-system/profile/share/xsessions"
":/run/current-system/profile/share/wayland-sessions")))
;; Seat configuration
(greeter-session lightdm-configuration-greeter-session
(default "lightdm-gtk-greeter"))
(xserver-command lightdm-configuration-xserver-command
(default (xorg-start-command)))
(pam-service lightdm-configuration-pam-service
(default (lightdm-pam-service)))
(pam-autologin-service lightdm-configuration-autologin-pam-service
(default (lightdm-autologin-pam-service)))
(pam-greeter-service lightdm-configuration-greeter-pam-service
(default (lightdm-greeter-pam-service)))
(autologin-user lightdm-configuration-autologin-user
(default ""))
(default-session-name lightdm-configuration-default-session
(default ""))
(autologin-timeout lightdm-configuration-autologin-timeout
(default ""))
;; lightdm-gtk-greeter specifics
;; Maybe it should have its own service
(gtk-greeter-theming-packages lightdm-configuration-gtk-greeter-theming-packages
(default (list adwaita-icon-theme)))
(gtk-greeter-theme-name lightdm-configuration-gtk-greeter-theme-name
(default ""))
(gtk-greeter-icon-theme-name
lightdm-configuration-gtk-greeter-icon-theme-name
(default "Adwaita"))
(gtk-greeter-cursor-theme-name
lightdm-configuration-gtk-greeter-cursor-theme-name
(default "Adwaita"))
(gtk-greeter-cursor-size lightdm-configuration-gtk-greeter-cursor-size
(default 16))
(gtk-greeter-background lightdm-configuration-gtk-greeter-background
(default "")))
(define %lightdm-accounts
(list (user-group (name "lightdm") (system? #t))
(user-account
(name "lightdm")
(group "lightdm")
(system? #t)
(comment "LighDM user")
(home-directory "/var/lib/lightdm")
(shell (file-append shadow "/sbin/nologin")))))
(define (lightdm-configuration-file config)
(mixed-text-file "lightdm.conf" "
[LightDM]
greeter-user = " (lightdm-configuration-user config) "
greeters-directory = " (lightdm-configuration-greeters-directory config) "
sessions-directory = " (lightdm-configuration-sessions-directory config) "
[Seat:*]
xserver-command = " (lightdm-configuration-xserver-command config) "
greeter-session = " (lightdm-configuration-greeter-session config) "
user-session = " (lightdm-configuration-default-session config) "
autologin-user = " (lightdm-configuration-autologin-user config) "
autologin-session = " (lightdm-configuration-default-session config) "
autologin-user-timeout = " (lightdm-configuration-autologin-timeout config)))
(define (lightdm-gtk-greeter-configuration-file config)
(mixed-text-file "lightdm-gtk-greeter.conf" "
[greeter]
theme-name = " (lightdm-configuration-gtk-greeter-theme-name config) "
icon-theme-name = " (lightdm-configuration-gtk-greeter-icon-theme-name config) "
cursor-theme-name = " (lightdm-configuration-gtk-greeter-cursor-theme-name config) "
cursor-theme-size = " (number->string (lightdm-configuration-gtk-greeter-cursor-size config)) "
background = " (lightdm-configuration-gtk-greeter-background config)))
(define (lightdm-shepherd-service config)
"Return a <lightdm-service> for LightDM with CONFIG."
(define lightdm-command
#~(list (string-append #$(lightdm-configuration-lightdm config) "/sbin/lightdm")))
(list (shepherd-service
(documentation "LightDM display manager.")
(requirement '(dbus-system user-processes host-name))
(provision '(display-manager))
(respawn? #f)
(start #~(lambda ()
(fork+exec-command
(list #$(file-append
(lightdm-configuration-lightdm config)
"/sbin/lightdm"))
#:environment-variables
(list
(string-append
"PATH=/run/current-system/profile/sbin"
":/run/current-system/profile/bin")))))
(stop #~(make-kill-destructor)))))
(define (lightdm-etc-service config)
(list `("xdg/lightdm/lightdm.conf.d/lightdm.conf"
,(lightdm-configuration-file config))
`("xdg/lightdm/lightdm-gtk-greeter.conf"
,(lightdm-gtk-greeter-configuration-file config))))
(define (lightdm-pam-services config)
(list (lightdm-configuration-pam-service config)
(lightdm-configuration-greeter-pam-service config)
(lightdm-configuration-autologin-pam-service config)))
(define (lightdm-profile-service config)
(append (list lightdm-gtk-greeter lightdm)
(lightdm-configuration-gtk-greeter-theming-packages config)))
(define (lightdm-activation-service config)
(with-imported-modules '((guix build utils))
#~(begin
(use-modules (guix build utils))
(define %user
(getpw #$(lightdm-configuration-user config)))
(let ((directory "/var/lib/lightdm-data"))
(mkdir-p directory)
(chown directory (passwd:uid %user) (passwd:gid %user))))))
(define lightdm-service-type
(service-type (name 'lightdm)
(extensions
(list
(service-extension shepherd-root-service-type
lightdm-shepherd-service)
(service-extension activation-service-type
lightdm-activation-service)
(service-extension pam-root-service-type
lightdm-pam-services)
(service-extension etc-service-type
lightdm-etc-service)
(service-extension dbus-root-service-type
(compose list lightdm-configuration-lightdm))
(service-extension account-service-type
(const %lightdm-accounts))
(service-extension profile-service-type
lightdm-profile-service)))
(default-value (lightdm-configuration))))
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