services: Add lightdm-service-type.
* gnu/services/lightdm.scm: New service. * tests/services/lightdm.scm: Test it. * doc/guix.texi (X Window): Document it. * gnu/local.mk (GNU_SYSTEM_MODULES): Register it. Co-authored-by: L p R n d n <guix@lprndn.info> Co-authored-by: Ricardo Wurmus <rekado@elephly.net>
This commit is contained in:
Maxim Cournoyer
parent
42fee6d0f1
commit
0ea62e84a7
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@ -533,6 +533,7 @@ SCM_TESTS = \
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tests/services.scm \
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tests/services/file-sharing.scm \
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tests/services/configuration.scm \
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tests/services/lightdm.scm \
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tests/services/linux.scm \
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tests/services/telephony.scm \
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tests/sets.scm \
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202
doc/guix.texi
202
doc/guix.texi
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@ -21278,6 +21278,208 @@ Relogin after logout.
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@end table
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@end deftp
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@cindex lightdm, graphical login manager
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@cindex display manager, lightdm
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@defvr {Scheme Variable} lightdm-service-type
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This is the type of the service to run the
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@url{https://github.com/canonical/lightdm,LightDM display manager}. Its
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value must be a @code{lightdm-configuration} record, which is documented
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below. Among its distinguishing features are TigerVNC integration for
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easily remoting your desktop as well as support for the XDMCP protocol,
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which can be used by remote clients to start a session from the login
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manager.
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In its most basic form, it can be used simply as:
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@lisp
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(service lightdm-service-type)
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@end lisp
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A more elaborate example making use of the VNC capabilities and enabling
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more features and verbose logs could look like:
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@lisp
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(service lightdm-service-type
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(lightdm-configuration
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(allow-empty-passwords? #t)
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(xdmcp? #t)
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(vnc-server? #t)
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(vnc-server-command
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(file-append tigervnc-server "/bin/Xvnc"
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" -SecurityTypes None"))
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(seats
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(list (lightdm-seat-configuration
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(name "*")
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(user-session "ratpoison"))))))
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@end lisp
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@end defvr
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@c The LightDM service documentation can be auto-generated via the
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@c 'generate-doc' procedure at the bottom of the (gnu services lightdm)
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@c module.
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@c %start of fragment
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@deftp {Data Type} lightdm-configuration
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Available @code{lightdm-configuration} fields are:
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@table @asis
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@item @code{lightdm} (default: @code{lightdm}) (type: file-like)
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The lightdm package to use.
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@item @code{allow-empty-passwords?} (default: @code{#f}) (type: boolean)
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Whether users not having a password set can login.
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@item @code{debug?} (default: @code{#f}) (type: boolean)
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Enable verbose output.
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@item @code{xorg-configuration} (type: xorg-configuration)
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The default Xorg server configuration to use to generate the Xorg server
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start script. It can be refined per seat via the @code{xserver-command}
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of the @code{<lightdm-seat-configuration>} record, if desired.
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@item @code{greeters} (type: list-of-greeter-configurations)
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The LightDM greeter configurations specifying the greeters to use.
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@item @code{seats} (type: list-of-seat-configurations)
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The seat configurations to use. A LightDM seat is akin to a user.
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@item @code{xdmcp?} (default: @code{#f}) (type: boolean)
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Whether a XDMCP server should listen on port UDP 177.
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@item @code{xdmcp-listen-address} (type: maybe-string)
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The host or IP address the XDMCP server listens for incoming
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connections. When unspecified, listen on for any hosts/IP addresses.
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@item @code{vnc-server?} (default: @code{#f}) (type: boolean)
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Whether a VNC server is started.
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@item @code{vnc-server-command} (type: file-like)
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The Xvnc command to use for the VNC server, it's possible to provide
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extra options not otherwise exposed along the command, for example to
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disable security:
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@lisp
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(vnc-server-command (file-append tigervnc-server "/bin/Xvnc"
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" -SecurityTypes None" ))
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@end lisp
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Or to set a PasswordFile for the classic (unsecure) VncAuth
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mecanism:
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@lisp
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(vnc-server-command (file-append tigervnc-server "/bin/Xvnc"
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" -PasswordFile /var/lib/lightdm/.vnc/passwd"))
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@end lisp
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The password file should be manually created using the
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@command{vncpasswd} command. Note that LightDM will create new sessions
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for VNC users, which means they need to authenticate in the same way as
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local users would.
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@item @code{vnc-server-listen-address} (type: maybe-string)
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The host or IP address the VNC server listens for incoming connections.
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When unspecified, listen for any hosts/IP addresses.
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@item @code{vnc-server-port} (default: @code{5900}) (type: number)
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The TCP port the VNC server should listen to.
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@item @code{extra-config} (default: @code{()}) (type: list-of-strings)
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Extra configuration values to append to the LightDM configuration file.
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@end table
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@end deftp
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@c %end of fragment
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@c %start of fragment
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@deftp {Data Type} lightdm-gtk-greeter-configuration
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Available @code{lightdm-gtk-greeter-configuration} fields are:
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@table @asis
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@item @code{lightdm-gtk-greeter} (default: @code{lightdm-gtk-greeter}) (type: file-like)
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The lightdm-gtk-greeter package to use.
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@item @code{assets} @
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(default: @code{(adwaita-icon-theme gnome-themes-extrahicolor-icon-theme)}) @
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(type: list-of-file-likes)
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The list of packages complementing the greeter, such as package
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providing icon themes.
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@item @code{theme-name} (default: @code{"Adwaita"}) (type: string)
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The name of the theme to use.
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@item @code{icon-theme-name} (default: @code{"Adwaita"}) (type: string)
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The name of the icon theme to use.
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@item @code{cursor-theme-name} (default: @code{"Adwaita"}) (type: string)
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The name of the cursor theme to use.
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@item @code{cursor-theme-size} (default: @code{16}) (type: number)
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The size to use for the the cursor theme.
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@item @code{allow-debugging?} (type: maybe-boolean)
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Set to #t to enable debug log level.
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@item @code{background} (type: file-like)
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The background image to use.
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@item @code{at-spi-enabled?} (default: @code{#f}) (type: boolean)
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Enable accessibility support through the Assistive Technology Service
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Provider Interface (AT-SPI).
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@item @code{a11y-states} @
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(default: @code{(contrast font keyboard reader)}) (type: list-of-a11y-states)
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The accessibility features to enable, given as list of symbols.
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@item @code{reader} (type: maybe-file-like)
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The command to use to launch a screen reader.
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@item @code{extra-config} (default: @code{()}) (type: list-of-strings)
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Extra configuration values to append to the LightDM GTK Greeter
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configuration file.
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@end table
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@end deftp
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@c %end of fragment
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@c %start of fragment
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@deftp {Data Type} lightdm-seat-configuration
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Available @code{lightdm-seat-configuration} fields are:
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@table @asis
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@item @code{name} (type: seat-name)
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The name of the seat. An asterisk (*) can be used in the name to apply
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the seat configuration to all the seat names it matches.
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@item @code{user-session} (type: maybe-string)
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The session to use by default. The session name must be provided as a
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lowercase string, such as @code{"gnome"}, @code{"ratpoison"}, etc.
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@item @code{type} (default: @code{local}) (type: seat-type)
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The type of the seat, either the @code{local} or @code{xremote} symbol.
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@item @code{autologin-user} (type: maybe-string)
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The username to automatically log in with by default.
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@item @code{greeter-session} @
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(default: @code{lightdm-gtk-greeter}) (type: greeter-session)
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The greeter session to use, specified as a symbol. Currently, only
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@code{lightdm-gtk-greeter} is supported.
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@item @code{xserver-command} (type: maybe-file-like)
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The Xorg server command to run.
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@item @code{session-wrapper} (type: file-like)
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The xinitrc session wrapper to use.
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@item @code{extra-config} (default: @code{()}) (type: list-of-strings)
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Extra configuration values to append to the seat configuration section.
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@end table
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@end deftp
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@c %end of fragment
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@cindex Xorg, configuration
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@deftp {Data Type} xorg-configuration
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@ -661,6 +661,7 @@ GNU_SYSTEM_MODULES = \
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%D%/services/guix.scm \
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%D%/services/hurd.scm \
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%D%/services/kerberos.scm \
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%D%/services/lightdm.scm \
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%D%/services/linux.scm \
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%D%/services/lirc.scm \
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%D%/services/virtualization.scm \
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@ -0,0 +1,687 @@
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;;; GNU Guix --- Functional package management for GNU
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;;; Copyright © 2019, 2020 L p R n d n <guix@lprndn.info>
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;;; Copyright © 2020 Ricardo Wurmus <rekado@elephly.net>
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;;; Copyright © 2022 Maxim Cournoyer <maxim.cournoyer@gmail.com>
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;;;
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;;; This file is part of GNU Guix.
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;;;
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;;; GNU Guix is free software; you can redistribute it and/or modify it
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;;; under the terms of the GNU General Public License as published by
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;;; the Free Software Foundation; either version 3 of the License, or (at
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;;; your option) any later version.
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;;;
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;;; GNU Guix is distributed in the hope that it will be useful, but
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;;; WITHOUT ANY WARRANTY; without even the implied warranty of
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;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;;; GNU General Public License for more details.
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;;;
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;;; You should have received a copy of the GNU General Public License
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;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
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(define-module (gnu services lightdm)
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#:use-module (gnu artwork)
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#:use-module (gnu packages admin)
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#:use-module (gnu packages display-managers)
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#:use-module (gnu packages freedesktop)
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#:use-module (gnu packages gnome)
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#:use-module (gnu packages vnc)
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#:use-module (gnu packages xorg)
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#:use-module (gnu services configuration)
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#:use-module (gnu services dbus)
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#:use-module (gnu services desktop)
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#:use-module (gnu services shepherd)
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#:use-module (gnu services xorg)
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#:use-module (gnu services)
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#:use-module (gnu system pam)
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#:use-module (gnu system shadow)
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#:use-module (guix diagnostics)
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#:use-module (guix gexp)
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#:use-module (guix i18n)
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#:use-module (guix records)
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#:use-module (ice-9 format)
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#:use-module (ice-9 match)
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#:use-module (oop goops)
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#:use-module (srfi srfi-1)
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#:use-module (srfi srfi-26)
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#:export (lightdm-seat-configuration
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lightdm-seat-configuration?
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lightdm-seat-configuration-name
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lightdm-seat-configuration-type
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lightdm-seat-configuration-user-session
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lightdm-seat-configuration-autologin-user
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lightdm-seat-configuration-greeter-session
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lightdm-seat-configuration-xserver-command
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lightdm-seat-configuration-session-wrapper
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lightdm-seat-configuration-extra-config
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lightdm-gtk-greeter-configuration
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lightdm-gtk-greeter-configuration?
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lightdm-gtk-greeter-configuration-lightdm-gtk-greeter
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lightdm-gtk-greeter-configuration-assets
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lightdm-gtk-greeter-configuration-theme-name
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lightdm-gtk-greeter-configuration-icon-theme-name
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lightdm-gtk-greeter-configuration-cursor-theme-name
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lightdm-gtk-greeter-configuration-allow-debug
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lightdm-gtk-greeter-configuration-background
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lightdm-gtk-greeter-configuration-a11y-states
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lightdm-gtk-greeter-configuration-reader
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lightdm-gtk-greeter-configuration-extra-config
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lightdm-configuration
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lightdm-configuration?
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lightdm-configuration-lightdm
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lightdm-configuration-allow-empty-passwords?
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lightdm-configuration-xorg-configuration
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lightdm-configuration-greeters
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lightdm-configuration-seats
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lightdm-configuration-xdmcp?
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lightdm-configuration-xdmcp-listen-address
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lightdm-configuration-vnc-server?
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lightdm-configuration-vnc-server-command
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lightdm-configuration-vnc-server-listen-address
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lightdm-configuration-vnc-server-port
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lightdm-configuration-extra-config
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lightdm-service-type))
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;;;
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;;; Greeters.
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;;;
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(define list-of-file-likes?
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(list-of file-like?))
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(define %a11y-states '(contrast font keyboard reader))
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(define (a11y-state? value)
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(memq value %a11y-states))
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(define list-of-a11y-states?
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(list-of a11y-state?))
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(define-maybe boolean)
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(define (serialize-boolean name value)
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(define (strip-trailing-? name)
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;; field? -> field
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(let ((str (symbol->string name)))
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(if (string-suffix? "?" str)
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(string-drop-right str 1)
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str)))
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(format #f "~a=~:[false~;true~]~%" (strip-trailing-? name) value))
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(define-maybe file-like)
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(define (serialize-file-like name value)
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#~(format #f "~a=~a~%" '#$name #$value))
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(define (serialize-list-of-a11y-states name value)
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(format #f "~a=~a~%" name (string-join (map symbol->string value) ";")))
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(define (serialize-string name value)
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(format #f "~a=~a~%" name value))
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(define (serialize-number name value)
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(format #f "~a=~a~%" name value))
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(define (serialize-list-of-strings _ value)
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(string-join value "\n"))
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(define-configuration lightdm-gtk-greeter-configuration
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(lightdm-gtk-greeter
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(file-like lightdm-gtk-greeter)
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"The lightdm-gtk-greeter package to use."
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empty-serializer)
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(assets
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(list-of-file-likes (list adwaita-icon-theme
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gnome-themes-extra
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;; FIXME: hicolor-icon-theme should be in the
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;; packages of the desktop templates.
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hicolor-icon-theme))
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"The list of packages complementing the greeter, such as package providing
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icon themes."
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empty-serializer)
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(theme-name
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(string "Adwaita")
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"The name of the theme to use.")
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(icon-theme-name
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(string "Adwaita")
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"The name of the icon theme to use.")
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(cursor-theme-name
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(string "Adwaita")
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"The name of the cursor theme to use.")
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(cursor-theme-size
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(number 16)
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"The size to use for the the cursor theme.")
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(allow-debugging?
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maybe-boolean
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"Set to #t to enable debug log level.")
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(background
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(file-like (file-append %artwork-repository
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"/backgrounds/guix-checkered-16-9.svg"))
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"The background image to use.")
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;; FIXME: This should be enabled by default, but it currently doesn't work,
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;; failing to connect to D-Bus, causing the login to fail.
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(at-spi-enabled?
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(boolean #f)
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"Enable accessibility support through the Assistive Technology Service
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Provider Interface (AT-SPI).")
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(a11y-states
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(list-of-a11y-states %a11y-states)
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"The accessibility features to enable, given as list of symbols.")
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(reader
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maybe-file-like
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"The command to use to launch a screen reader.")
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(extra-config
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(list-of-strings '())
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"Extra configuration values to append to the LightDM GTK Greeter
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configuration file."))
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(define (strip-class-name-brackets name)
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"Remove the '<<' and '>>' brackets from NAME, a symbol."
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(let ((name* (symbol->string name)))
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(if (and (string-prefix? "<<" name*)
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(string-suffix? ">>" name*))
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(string->symbol (string-drop (string-drop-right name* 2) 2))
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(error "unexpected class name" name*))))
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(define (config->name config)
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"Return the constructor name (a symbol) from CONFIG."
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(strip-class-name-brackets (class-name (class-of config))))
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(define (greeter-configuration->greeter-fields config)
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"Return the fields of CONFIG, a greeter configuration."
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(match config
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;; Note: register any new greeter configuration here.
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((? lightdm-gtk-greeter-configuration?)
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lightdm-gtk-greeter-configuration-fields)))
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(define (greeter-configuration->packages config)
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"Return the list of greeter packages, including assets, used by CONFIG, a
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greeter configuration."
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(match config
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;; Note: register any new greeter configuration here.
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((? lightdm-gtk-greeter-configuration?)
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(cons (lightdm-gtk-greeter-configuration-lightdm-gtk-greeter config)
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(lightdm-gtk-greeter-configuration-assets config)))))
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;;; TODO: Implement directly in (gnu services configuration), perhaps by
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;;; making the FIELDS argument optional.
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(define (serialize-configuration* config)
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"Like `serialize-configuration', but not requiring to provide a FIELDS
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argument."
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(define fields (greeter-configuration->greeter-fields config))
|
||||
(serialize-configuration config fields))
|
||||
|
||||
(define (greeter-configuration->conf-name config)
|
||||
"Return the file name of CONFIG, a greeter configuration."
|
||||
(format #f "~a.conf" (greeter-configuration->greeter-session config)))
|
||||
|
||||
(define (greeter-configuration->file config)
|
||||
"Serialize CONFIG into a file under the output directory, so that it can be
|
||||
easily added to XDG_CONF_DIRS."
|
||||
(computed-file
|
||||
(greeter-configuration->conf-name config)
|
||||
#~(begin
|
||||
(call-with-output-file #$output
|
||||
(lambda (port)
|
||||
(format port (string-append
|
||||
"[greeter]\n"
|
||||
#$(serialize-configuration* config))))))))
|
||||
|
||||
|
||||
;;;
|
||||
;;; Seats.
|
||||
;;;
|
||||
|
||||
(define seat-name? string?)
|
||||
|
||||
(define (serialize-seat-name _ value)
|
||||
(format #f "[Seat:~a]~%" value))
|
||||
|
||||
(define (seat-type? type)
|
||||
(memq type '(local xremote)))
|
||||
|
||||
(define (serialize-seat-type name value)
|
||||
(format #f "~a=~a~%" name value))
|
||||
|
||||
(define-maybe seat-type)
|
||||
|
||||
(define (greeter-session? value)
|
||||
(memq value '(lightdm-gtk-greeter)))
|
||||
|
||||
(define (serialize-greeter-session name value)
|
||||
(format #f "~a=~a~%" name value))
|
||||
|
||||
(define-maybe greeter-session)
|
||||
|
||||
(define-maybe string)
|
||||
|
||||
;;; Note: all the fields except for the seat name should be 'maybe's, since
|
||||
;;; the real default value is set by the %lightdm-seat-default define later,
|
||||
;;; and this avoids repeating ourselves in the serialized configuration file.
|
||||
(define-configuration lightdm-seat-configuration
|
||||
(name
|
||||
seat-name
|
||||
"The name of the seat. An asterisk (*) can be used in the name
|
||||
to apply the seat configuration to all the seat names it matches.")
|
||||
(user-session
|
||||
maybe-string
|
||||
"The session to use by default. The session name must be provided as a
|
||||
lowercase string, such as @code{\"gnome\"}, @code{\"ratpoison\"}, etc.")
|
||||
(type
|
||||
(seat-type 'local)
|
||||
"The type of the seat, either the @code{local} or @code{xremote} symbol.")
|
||||
(autologin-user
|
||||
maybe-string
|
||||
"The username to automatically log in with by default.")
|
||||
(greeter-session
|
||||
(greeter-session 'lightdm-gtk-greeter)
|
||||
"The greeter session to use, specified as a symbol. Currently, only
|
||||
@code{lightdm-gtk-greeter} is supported.")
|
||||
;; Note: xserver-command must be lazily computed, so that it can be
|
||||
;; overridden via 'lightdm-configuration-xorg-configuration'.
|
||||
(xserver-command
|
||||
maybe-file-like
|
||||
"The Xorg server command to run.")
|
||||
(session-wrapper
|
||||
(file-like (xinitrc))
|
||||
"The xinitrc session wrapper to use.")
|
||||
(extra-config
|
||||
(list-of-strings '())
|
||||
"Extra configuration values to append to the seat configuration section."))
|
||||
|
||||
(define (greeter-session->greater-configuration-pred identifier)
|
||||
"Return the predicate to check if a configuration is of the type specifying
|
||||
a greeter identified by IDENTIFIER."
|
||||
(match identifier
|
||||
;; Note: register any new greeter identifier here.
|
||||
('lightdm-gtk-greeter
|
||||
lightdm-gtk-greeter-configuration?)))
|
||||
|
||||
(define (greeter-configuration->greeter-session config)
|
||||
"Given CONFIG, a greeter configuration object, return its identifier,
|
||||
a symbol."
|
||||
(let ((suffix "-configuration")
|
||||
(greeter-conf-name (config->name config)))
|
||||
(string->symbol (string-drop-right (symbol->string greeter-conf-name)
|
||||
(string-length suffix)))))
|
||||
|
||||
(define list-of-seat-configurations?
|
||||
(list-of lightdm-seat-configuration?))
|
||||
|
||||
|
||||
;;;
|
||||
;;; LightDM.
|
||||
;;;
|
||||
|
||||
(define (greeter-configuration? config)
|
||||
(or (lightdm-gtk-greeter-configuration? config)
|
||||
;; Note: register any new greeter configuration here.
|
||||
))
|
||||
|
||||
(define (list-of-greeter-configurations? greeter-configs)
|
||||
(and ((list-of greeter-configuration?) greeter-configs)
|
||||
;; Greeter configurations must also not be provided more than once.
|
||||
(let* ((types (map (cut (compose class-name class-of) <>)
|
||||
greeter-configs))
|
||||
(dupes (filter (lambda (type)
|
||||
(< 1 (count (cut eq? type <>) types)))
|
||||
types)))
|
||||
(unless (null? dupes)
|
||||
(leave (G_ "duplicate greeter configurations: ~a~%") dupes)))))
|
||||
|
||||
(define-configuration/no-serialization lightdm-configuration
|
||||
(lightdm
|
||||
(file-like lightdm)
|
||||
"The lightdm package to use.")
|
||||
(allow-empty-passwords?
|
||||
(boolean #f)
|
||||
"Whether users not having a password set can login.")
|
||||
(debug?
|
||||
(boolean #f)
|
||||
"Enable verbose output.")
|
||||
(xorg-configuration
|
||||
(xorg-configuration (xorg-configuration))
|
||||
"The default Xorg server configuration to use to generate the Xorg server
|
||||
start script. It can be refined per seat via the @code{xserver-command} of
|
||||
the @code{<lightdm-seat-configuration>} record, if desired.")
|
||||
(greeters
|
||||
(list-of-greeter-configurations (list (lightdm-gtk-greeter-configuration)))
|
||||
"The LightDM greeter configurations specifying the greeters to use.")
|
||||
(seats
|
||||
(list-of-seat-configurations (list (lightdm-seat-configuration
|
||||
(name "*"))))
|
||||
"The seat configurations to use. A LightDM seat is akin to a user.")
|
||||
(xdmcp?
|
||||
(boolean #f)
|
||||
"Whether a XDMCP server should listen on port UDP 177.")
|
||||
(xdmcp-listen-address
|
||||
maybe-string
|
||||
"The host or IP address the XDMCP server listens for incoming connections.
|
||||
When unspecified, listen on for any hosts/IP addresses.")
|
||||
(vnc-server?
|
||||
(boolean #f)
|
||||
"Whether a VNC server is started.")
|
||||
(vnc-server-command
|
||||
(file-like (file-append tigervnc-server "bin/Xvnc"))
|
||||
"The Xvnc command to use for the VNC server, it's possible to provide extra
|
||||
options not otherwise exposed along the command, for example to disable
|
||||
security:
|
||||
@lisp
|
||||
(vnc-server-command
|
||||
(file-append tigervnc-server \"/bin/Xvnc\"
|
||||
\" -SecurityTypes None\" ))
|
||||
@end lisp
|
||||
|
||||
Or to set a PasswordFile for the classic (unsecure) VncAuth mecanism:
|
||||
@lisp
|
||||
(vnc-server-command
|
||||
(file-append tigervnc-server \"/bin/Xvnc\"
|
||||
\" -PasswordFile /var/lib/lightdm/.vnc/passwd\"))
|
||||
@end lisp
|
||||
The password file should be manually created using the @command{vncpasswd}
|
||||
command.
|
||||
|
||||
Note that LightDM will create new sessions for VNC users, which means they
|
||||
need to authenticate in the same way as local users would.
|
||||
")
|
||||
(vnc-server-listen-address
|
||||
maybe-string
|
||||
"The host or IP address the VNC server listens for incoming connections.
|
||||
When unspecified, listen for any hosts/IP addresses.")
|
||||
(vnc-server-port
|
||||
(number 5900)
|
||||
"The TCP port the VNC server should listen to.")
|
||||
(extra-config
|
||||
(list-of-strings '())
|
||||
"Extra configuration values to append to the LightDM configuration file."))
|
||||
|
||||
(define (lightdm-configuration->greeters-config-dir config)
|
||||
"Return a directory containing all the serialized greeter configurations
|
||||
from CONFIG, a <lightdm-configuration> object."
|
||||
(file-union "etc-lightdm"
|
||||
(append-map (lambda (g)
|
||||
`((,(greeter-configuration->conf-name g)
|
||||
,(greeter-configuration->file g))))
|
||||
(lightdm-configuration-greeters config))))
|
||||
|
||||
(define (lightdm-configuration->packages config)
|
||||
"Return all the greeter packages and their assets defined in CONFIG, a
|
||||
<lightdm-configuration> object, as well as the lightdm package itself."
|
||||
(cons (lightdm-configuration-lightdm config)
|
||||
(append-map greeter-configuration->packages
|
||||
(lightdm-configuration-greeters config))))
|
||||
|
||||
(define (validate-lightdm-configuration config)
|
||||
"Sanity check CONFIG, a <lightdm-configuration> record instance."
|
||||
;; This is required to make inter-field validations, such as between the
|
||||
;; seats and greeters.
|
||||
(let* ((seats (lightdm-configuration-seats config))
|
||||
(greeter-sessions (delete-duplicates
|
||||
(map lightdm-seat-configuration-greeter-session
|
||||
seats)
|
||||
eq?))
|
||||
(greeter-configurations (lightdm-configuration-greeters config))
|
||||
(missing-greeters
|
||||
(filter-map
|
||||
(lambda (id)
|
||||
(define pred (greeter-session->greater-configuration-pred id))
|
||||
(if (find pred greeter-configurations)
|
||||
#f ;happy path
|
||||
id))
|
||||
greeter-sessions)))
|
||||
(unless (null? missing-greeters)
|
||||
(leave (G_ "no greeter configured for seat greeter sessions: ~a~%")
|
||||
missing-greeters))))
|
||||
|
||||
(define (lightdm-configuration-file config)
|
||||
(match-record config <lightdm-configuration>
|
||||
(xorg-configuration seats
|
||||
xdmcp? xdmcp-listen-address
|
||||
vnc-server? vnc-server-command vnc-server-listen-address vnc-server-port
|
||||
extra-config)
|
||||
(apply
|
||||
mixed-text-file
|
||||
"lightdm.conf" "
|
||||
#
|
||||
# General configuration
|
||||
#
|
||||
[LightDM]
|
||||
greeter-user=lightdm
|
||||
sessions-directory=/run/current-system/profile/share/xsessions\
|
||||
:/run/current-system/profile/share/wayland-sessions
|
||||
remote-sessions-directory=/run/current-system/profile/share/remote-sessions
|
||||
"
|
||||
#~(string-join '#$extra-config "\n")
|
||||
"
|
||||
#
|
||||
# XDMCP Server configuration
|
||||
#
|
||||
[XDMCPServer]
|
||||
enabled=" (if xdmcp? "true" "false") "\n"
|
||||
(if (maybe-value-set? xdmcp-listen-address)
|
||||
(format #f "xdmcp-listen-address=~a" xdmcp-listen-address)
|
||||
"") "
|
||||
|
||||
#
|
||||
# VNC Server configuration
|
||||
#
|
||||
[VNCServer]
|
||||
enabled=" (if vnc-server? "true" "false") "
|
||||
command=" vnc-server-command "
|
||||
port=" (number->string vnc-server-port) "\n"
|
||||
(if (maybe-value-set? vnc-server-listen-address)
|
||||
(format #f "vnc-server-listen-address=~a" vnc-server-listen-address)
|
||||
"") "
|
||||
|
||||
#
|
||||
# Seat configuration.
|
||||
#
|
||||
"
|
||||
(map (lambda (seat)
|
||||
;; This complication exists to propagate a default value for
|
||||
;; the 'xserver-command' field of the seats. Having a
|
||||
;; 'xorg-configuration' field at the root of the
|
||||
;; lightdm-configuration enables the use of
|
||||
;; 'set-xorg-configuration' and can be more convenient.
|
||||
(let ((seat* (if (maybe-value-set?
|
||||
(lightdm-seat-configuration-xserver-command seat))
|
||||
seat
|
||||
(lightdm-seat-configuration
|
||||
(inherit seat)
|
||||
(xserver-command (xorg-start-command
|
||||
xorg-configuration))))))
|
||||
(serialize-configuration seat*
|
||||
lightdm-seat-configuration-fields)))
|
||||
seats))))
|
||||
|
||||
(define %lightdm-accounts
|
||||
(list (user-group (name "lightdm") (system? #t))
|
||||
(user-account
|
||||
(name "lightdm")
|
||||
(group "lightdm")
|
||||
(system? #t)
|
||||
(comment "LightDM user")
|
||||
(home-directory "/var/lib/lightdm")
|
||||
(shell (file-append shadow "/sbin/nologin")))))
|
||||
|
||||
(define %lightdm-activation
|
||||
;; Ensure /var/lib/lightdm is owned by the "lightdm" user. Adapted from the
|
||||
;; %gdm-activation.
|
||||
(with-imported-modules '((guix build utils))
|
||||
#~(begin
|
||||
(use-modules (guix build utils))
|
||||
|
||||
(define (ensure-ownership directory)
|
||||
(let* ((lightdm (getpwnam "lightdm"))
|
||||
(uid (passwd:uid lightdm))
|
||||
(gid (passwd:gid lightdm))
|
||||
(st (stat directory #f)))
|
||||
;; Recurse into directory only if it has wrong ownership.
|
||||
(when (and st
|
||||
(or (not (= uid (stat:uid st)))
|
||||
(not (= gid (stat:gid st)))))
|
||||
(for-each (lambda (file)
|
||||
(chown file uid gid))
|
||||
(find-files "directory"
|
||||
#:directories? #t)))))
|
||||
|
||||
(when (not (stat "/var/lib/lightdm-data" #f))
|
||||
(mkdir-p "/var/lib/lightdm-data"))
|
||||
(for-each ensure-ownership
|
||||
'("/var/lib/lightdm"
|
||||
"/var/lib/lightdm-data")))))
|
||||
|
||||
(define (lightdm-pam-service config)
|
||||
"Return a PAM service for @command{lightdm}."
|
||||
(unix-pam-service "lightdm"
|
||||
#:login-uid? #t
|
||||
#:allow-empty-passwords?
|
||||
(lightdm-configuration-allow-empty-passwords? config)))
|
||||
|
||||
(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"))))
|
||||
;; Prohibit changing password.
|
||||
(password (list (pam-entry (control "required") (module "pam_deny.so"))))
|
||||
;; Setup session.
|
||||
(session (list (pam-entry (control "required") (module "pam_unix.so"))))))
|
||||
|
||||
(define (lightdm-autologin-pam-service)
|
||||
"Return a PAM service for @command{lightdm-autologin}}."
|
||||
(pam-service
|
||||
(name "lightdm-autologin")
|
||||
(auth
|
||||
(list
|
||||
;; Block login if user is globally disabled.
|
||||
(pam-entry (control "required") (module "pam_nologin.so"))
|
||||
(pam-entry (control "required") (module "pam_succeed_if.so")
|
||||
(arguments (list "uid >= 1000")))
|
||||
;; 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"))))
|
||||
;; Prohibit changing password.
|
||||
(password (list (pam-entry (control "required") (module "pam_deny.so"))))
|
||||
;; Setup session.
|
||||
(session (list (pam-entry (control "required") (module "pam_unix.so"))))))
|
||||
|
||||
(define (lightdm-pam-services config)
|
||||
(list (lightdm-pam-service config)
|
||||
(lightdm-greeter-pam-service)
|
||||
(lightdm-autologin-pam-service)))
|
||||
|
||||
(define (lightdm-shepherd-service config)
|
||||
"Return a <lightdm-service> for LightDM using CONFIG."
|
||||
|
||||
(validate-lightdm-configuration config)
|
||||
|
||||
(define lightdm-command
|
||||
#~(list #$(file-append (lightdm-configuration-lightdm config)
|
||||
"/sbin/lightdm")
|
||||
#$@(if (lightdm-configuration-debug? config)
|
||||
#~("--debug")
|
||||
#~())
|
||||
"--config"
|
||||
#$(lightdm-configuration-file config)))
|
||||
|
||||
(define lightdm-paths
|
||||
(let ((lightdm (lightdm-configuration-lightdm config)))
|
||||
#~(string-join
|
||||
'#$(map (lambda (dir)
|
||||
(file-append lightdm dir))
|
||||
'("/bin" "/sbin" "/libexec"))
|
||||
":")))
|
||||
|
||||
(define greeters-config-dir
|
||||
(lightdm-configuration->greeters-config-dir config))
|
||||
|
||||
(define data-dirs
|
||||
;; LightDM itself needs to be in XDG_DATA_DIRS for the accountsservice
|
||||
;; interface it provides to be picked up. The greeters must also be in
|
||||
;; XDG_DATA_DIRS to be found.
|
||||
(let ((packages (lightdm-configuration->packages config)))
|
||||
#~(string-join '#$(map (cut file-append <> "/share") packages)
|
||||
":")))
|
||||
|
||||
(list
|
||||
(shepherd-service
|
||||
(documentation "LightDM display manager")
|
||||
(requirement '(dbus-system user-processes host-name))
|
||||
(provision '(lightdm display-manager xorg-server))
|
||||
(respawn? #f)
|
||||
(start
|
||||
#~(lambda ()
|
||||
;; Note: sadly, environment variables defined for 'lightdm' are
|
||||
;; cleared and/or overridden by /etc/profile by its spawned greeters,
|
||||
;; so an out-of-band means such as /etc is required.
|
||||
(fork+exec-command #$lightdm-command
|
||||
;; Lightdm needs itself in its PATH.
|
||||
#:environment-variables
|
||||
(list
|
||||
;; It knows to look for greeter configurations in
|
||||
;; XDG_CONFIG_DIRS...
|
||||
(string-append "XDG_CONFIG_DIRS="
|
||||
#$greeters-config-dir)
|
||||
;; ... and for greeter .desktop files as well as
|
||||
;; lightdm accountsservice interface in
|
||||
;; XDG_DATA_DIRS.
|
||||
(string-append "XDG_DATA_DIRS="
|
||||
#$data-dirs)
|
||||
(string-append "PATH=" #$lightdm-paths)))))
|
||||
(stop #~(make-kill-destructor)))))
|
||||
|
||||
(define lightdm-service-type
|
||||
(handle-xorg-configuration
|
||||
lightdm-configuration
|
||||
(service-type
|
||||
(name 'lightdm)
|
||||
(default-value (lightdm-configuration))
|
||||
(extensions
|
||||
(list (service-extension pam-root-service-type lightdm-pam-services)
|
||||
(service-extension shepherd-root-service-type
|
||||
lightdm-shepherd-service)
|
||||
(service-extension activation-service-type
|
||||
(const %lightdm-activation))
|
||||
(service-extension dbus-root-service-type
|
||||
(compose list lightdm-configuration-lightdm))
|
||||
(service-extension polkit-service-type
|
||||
(compose list lightdm-configuration-lightdm))
|
||||
(service-extension account-service-type
|
||||
(const %lightdm-accounts))
|
||||
;; Add 'lightdm' to the system profile, so that its
|
||||
;; 'share/accountsservice' D-Bus service extension directory can be
|
||||
;; found via the 'XDG_DATA_DIRS=/run/current-system/profile/share'
|
||||
;; environment variable set in the wrapper of the
|
||||
;; libexec/accounts-daemon binary of the accountsservice package.
|
||||
;; This daemon is spawned by D-Bus, and there's little we can do to
|
||||
;; affect its environment. For more reading, see:
|
||||
;; https://github.com/NixOS/nixpkgs/issues/45059.
|
||||
(service-extension profile-service-type
|
||||
lightdm-configuration->packages)
|
||||
;; This is needed for the greeter itself to find its configuration,
|
||||
;; because XDG_CONF_DIRS gets overridden by /etc/profile.
|
||||
(service-extension
|
||||
etc-service-type
|
||||
(lambda (config)
|
||||
`(("lightdm"
|
||||
,(lightdm-configuration->greeters-config-dir config)))))))
|
||||
(description "Run @code{lightdm}, the LightDM graphical login manager."))))
|
||||
|
||||
|
||||
;;;
|
||||
;;; Generate documentation.
|
||||
;;;
|
||||
(define (generate-doc)
|
||||
(configuration->documentation 'lightdm-configuration)
|
||||
(configuration->documentation 'lightdm-gtk-greeter-configuration)
|
||||
(configuration->documentation 'lightdm-seat-configuration))
|
||||
|
|
@ -0,0 +1,160 @@
|
|||
;;; GNU Guix --- Functional package management for GNU
|
||||
;;; Copyright © 2022 Maxim Cournoyer <maxim.cournoyer@gmail.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 tests lightdm)
|
||||
#:use-module (gnu bootloader)
|
||||
#:use-module (gnu bootloader grub)
|
||||
#:use-module (gnu packages)
|
||||
#:use-module (gnu packages ocr)
|
||||
#:use-module (gnu packages ratpoison)
|
||||
#:use-module (gnu packages vnc)
|
||||
#:use-module (gnu packages xorg)
|
||||
#:use-module (gnu services)
|
||||
#:use-module (gnu services base)
|
||||
#:use-module (gnu services dbus)
|
||||
#:use-module (gnu services desktop)
|
||||
#:use-module (gnu services networking)
|
||||
#:use-module (gnu services lightdm)
|
||||
#:use-module (gnu services ssh)
|
||||
#:use-module (gnu services xorg)
|
||||
#:use-module (gnu system)
|
||||
#:use-module (gnu system file-systems)
|
||||
#:use-module (gnu system shadow)
|
||||
#:use-module (gnu system vm)
|
||||
#:use-module (gnu tests)
|
||||
#:use-module (guix gexp)
|
||||
#:use-module (guix modules)
|
||||
#:use-module (srfi srfi-1)
|
||||
#:export (%test-lightdm))
|
||||
|
||||
(define minimal-desktop-services
|
||||
(list polkit-wheel-service
|
||||
(service upower-service-type)
|
||||
(accountsservice-service)
|
||||
(service polkit-service-type)
|
||||
(elogind-service)
|
||||
(dbus-service)
|
||||
x11-socket-directory-service))
|
||||
|
||||
(define %lightdm-os
|
||||
(operating-system
|
||||
(inherit %simple-os)
|
||||
(packages (cons* ocrad ratpoison xterm %base-packages))
|
||||
(services
|
||||
(cons* (service lightdm-service-type
|
||||
(lightdm-configuration
|
||||
(allow-empty-passwords? #t)
|
||||
(debug? #t)
|
||||
(xdmcp? #t)
|
||||
(vnc-server? #t)
|
||||
(vnc-server-command
|
||||
(file-append tigervnc-server "/bin/Xvnc"
|
||||
" -SecurityTypes None"))
|
||||
(greeters (list (lightdm-gtk-greeter-configuration
|
||||
(allow-debugging? #t))))
|
||||
(seats (list (lightdm-seat-configuration
|
||||
(name "*")
|
||||
(user-session "ratpoison"))))))
|
||||
|
||||
;; For debugging.
|
||||
(service dhcp-client-service-type)
|
||||
(service openssh-service-type
|
||||
(openssh-configuration
|
||||
(permit-root-login #t)
|
||||
(allow-empty-passwords? #t)))
|
||||
(append minimal-desktop-services
|
||||
(remove (lambda (service)
|
||||
(eq? (service-kind service) guix-service-type))
|
||||
%base-services))))))
|
||||
|
||||
(define (run-lightdm-test)
|
||||
"Run tests in %LIGHTDM-OS."
|
||||
|
||||
(define os (marionette-operating-system
|
||||
%lightdm-os
|
||||
#:imported-modules (source-module-closure
|
||||
'((gnu services herd)))))
|
||||
|
||||
(define vm (virtual-machine os))
|
||||
|
||||
(define test
|
||||
(with-imported-modules (source-module-closure
|
||||
'((gnu build marionette)))
|
||||
#~(begin
|
||||
(use-modules (gnu build marionette)
|
||||
(srfi srfi-26)
|
||||
(srfi srfi-64))
|
||||
|
||||
(let ((marionette (make-marionette (list #$vm))))
|
||||
|
||||
(test-runner-current (system-test-runner #$output))
|
||||
(test-begin "lightdm")
|
||||
|
||||
(test-assert "service is running"
|
||||
(marionette-eval
|
||||
'(begin
|
||||
(use-modules (gnu services herd))
|
||||
(start-service 'lightdm))
|
||||
marionette))
|
||||
|
||||
(test-assert "service can be stopped"
|
||||
(marionette-eval
|
||||
'(begin
|
||||
(use-modules (gnu services herd))
|
||||
(stop-service 'lightdm))
|
||||
marionette))
|
||||
|
||||
(test-assert "service can be restarted"
|
||||
(marionette-eval
|
||||
'(begin
|
||||
(use-modules (gnu services herd))
|
||||
(restart-service 'lightdm))
|
||||
marionette))
|
||||
|
||||
(test-assert "login screen is displayed"
|
||||
;; GNU Ocrad fails to recognize the "Log In" button text, so use
|
||||
;; Tesseract.
|
||||
(wait-for-screen-text marionette
|
||||
(cut string-contains <> "Log In")
|
||||
#:ocr #$(file-append tesseract-ocr
|
||||
"/bin/tesseract")))
|
||||
|
||||
(test-assert "can connect to TCP port 5900 on IPv4"
|
||||
(wait-for-tcp-port 5900 marionette))
|
||||
|
||||
;; The VNC server fails to listen to IPv6 due to "Error binding to
|
||||
;; address [::]:5900: Address already in use" (see:
|
||||
;; https://github.com/canonical/lightdm/issues/266).
|
||||
(test-expect-fail 1)
|
||||
(test-assert "can connect to TCP port 5900 on IPv6"
|
||||
(wait-for-tcp-port 5900 marionette
|
||||
#:address
|
||||
`(make-socket-address
|
||||
AF_INET6
|
||||
(inet-pton AF_INET6 "::1")
|
||||
5900)))
|
||||
|
||||
(test-end)))))
|
||||
|
||||
(gexp->derivation "lightdm-test" test))
|
||||
|
||||
(define %test-lightdm
|
||||
(system-test
|
||||
(name "lightdm")
|
||||
(description "Basic tests for the LightDM service.")
|
||||
(value (run-lightdm-test))))
|
||||
|
|
@ -0,0 +1,52 @@
|
|||
;;; GNU Guix --- Functional package management for GNU
|
||||
;;; Copyright © 2022 Maxim Cournoyer <maxim.cournoyer@gmail.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 (tests services lightdm)
|
||||
#:use-module (guix diagnostics)
|
||||
#:use-module (gnu services lightdm)
|
||||
#:use-module (srfi srfi-64))
|
||||
|
||||
;;; Tests for the (gnu services lightdm) module.
|
||||
|
||||
;;; Access some internals for whitebox testing.
|
||||
(define validate-lightdm-configuration (@@ (gnu services lightdm)
|
||||
validate-lightdm-configuration))
|
||||
|
||||
(test-begin "lightdm-service")
|
||||
|
||||
(test-equal "error on missing greeter"
|
||||
'ok
|
||||
(catch 'quit
|
||||
(lambda ()
|
||||
(validate-lightdm-configuration (lightdm-configuration (greeters '()))))
|
||||
(lambda _
|
||||
'ok)))
|
||||
|
||||
(test-equal "error when a greeter has multiple configurations"
|
||||
'ok
|
||||
(catch 'quit
|
||||
(lambda ()
|
||||
(lightdm-configuration
|
||||
(greeters (list (lightdm-gtk-greeter-configuration
|
||||
(theme-name "boring"))
|
||||
(lightdm-gtk-greeter-configuration
|
||||
(theme-name "blue"))))))
|
||||
(lambda _
|
||||
'ok)))
|
||||
|
||||
(test-end "lightdm-service")
|
||||
Loading…
Reference in New Issue