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diff --git a/doc/guix.texi b/doc/guix.texi index 4f6973518f..7199ff6bc2 100644 --- a/doc/guix.texi +++ b/doc/guix.texi @@ -21278,6 +21278,208 @@ Relogin after logout. @end table @end deftp +@cindex lightdm, graphical login manager +@cindex display manager, lightdm +@defvr {Scheme Variable} lightdm-service-type +This is the type of the service to run the +@url{https://github.com/canonical/lightdm,LightDM display manager}. Its +value must be a @code{lightdm-configuration} record, which is documented +below. Among its distinguishing features are TigerVNC integration for +easily remoting your desktop as well as support for the XDMCP protocol, +which can be used by remote clients to start a session from the login +manager. + +In its most basic form, it can be used simply as: + +@lisp +(service lightdm-service-type) +@end lisp + +A more elaborate example making use of the VNC capabilities and enabling +more features and verbose logs could look like: + +@lisp +(service lightdm-service-type + (lightdm-configuration + (allow-empty-passwords? #t) + (xdmcp? #t) + (vnc-server? #t) + (vnc-server-command + (file-append tigervnc-server "/bin/Xvnc" + " -SecurityTypes None")) + (seats + (list (lightdm-seat-configuration + (name "*") + (user-session "ratpoison")))))) +@end lisp +@end defvr + +@c The LightDM service documentation can be auto-generated via the +@c 'generate-doc' procedure at the bottom of the (gnu services lightdm) +@c module. +@c %start of fragment +@deftp {Data Type} lightdm-configuration +Available @code{lightdm-configuration} fields are: + +@table @asis +@item @code{lightdm} (default: @code{lightdm}) (type: file-like) +The lightdm package to use. + +@item @code{allow-empty-passwords?} (default: @code{#f}) (type: boolean) +Whether users not having a password set can login. + +@item @code{debug?} (default: @code{#f}) (type: boolean) +Enable verbose output. + +@item @code{xorg-configuration} (type: 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. + +@item @code{greeters} (type: list-of-greeter-configurations) +The LightDM greeter configurations specifying the greeters to use. + +@item @code{seats} (type: list-of-seat-configurations) +The seat configurations to use. A LightDM seat is akin to a user. + +@item @code{xdmcp?} (default: @code{#f}) (type: boolean) +Whether a XDMCP server should listen on port UDP 177. + +@item @code{xdmcp-listen-address} (type: maybe-string) +The host or IP address the XDMCP server listens for incoming +connections. When unspecified, listen on for any hosts/IP addresses. + +@item @code{vnc-server?} (default: @code{#f}) (type: boolean) +Whether a VNC server is started. + +@item @code{vnc-server-command} (type: file-like) +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. + +@item @code{vnc-server-listen-address} (type: maybe-string) +The host or IP address the VNC server listens for incoming connections. +When unspecified, listen for any hosts/IP addresses. + +@item @code{vnc-server-port} (default: @code{5900}) (type: number) +The TCP port the VNC server should listen to. + +@item @code{extra-config} (default: @code{()}) (type: list-of-strings) +Extra configuration values to append to the LightDM configuration file. + +@end table +@end deftp + + +@c %end of fragment +@c %start of fragment + +@deftp {Data Type} lightdm-gtk-greeter-configuration +Available @code{lightdm-gtk-greeter-configuration} fields are: + +@table @asis +@item @code{lightdm-gtk-greeter} (default: @code{lightdm-gtk-greeter}) (type: file-like) +The lightdm-gtk-greeter package to use. + +@item @code{assets} @ +(default: @code{(adwaita-icon-theme gnome-themes-extrahicolor-icon-theme)}) @ +(type: list-of-file-likes) +The list of packages complementing the greeter, such as package +providing icon themes. + +@item @code{theme-name} (default: @code{"Adwaita"}) (type: string) +The name of the theme to use. + +@item @code{icon-theme-name} (default: @code{"Adwaita"}) (type: string) +The name of the icon theme to use. + +@item @code{cursor-theme-name} (default: @code{"Adwaita"}) (type: string) +The name of the cursor theme to use. + +@item @code{cursor-theme-size} (default: @code{16}) (type: number) +The size to use for the the cursor theme. + +@item @code{allow-debugging?} (type: maybe-boolean) +Set to #t to enable debug log level. + +@item @code{background} (type: file-like) +The background image to use. + +@item @code{at-spi-enabled?} (default: @code{#f}) (type: boolean) +Enable accessibility support through the Assistive Technology Service +Provider Interface (AT-SPI). + +@item @code{a11y-states} @ +(default: @code{(contrast font keyboard reader)}) (type: list-of-a11y-states) +The accessibility features to enable, given as list of symbols. + +@item @code{reader} (type: maybe-file-like) +The command to use to launch a screen reader. + +@item @code{extra-config} (default: @code{()}) (type: list-of-strings) +Extra configuration values to append to the LightDM GTK Greeter +configuration file. + +@end table +@end deftp + +@c %end of fragment +@c %start of fragment + +@deftp {Data Type} lightdm-seat-configuration +Available @code{lightdm-seat-configuration} fields are: + +@table @asis +@item @code{name} (type: 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. + +@item @code{user-session} (type: 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. + +@item @code{type} (default: @code{local}) (type: seat-type) +The type of the seat, either the @code{local} or @code{xremote} symbol. + +@item @code{autologin-user} (type: maybe-string) +The username to automatically log in with by default. + +@item @code{greeter-session} @ +(default: @code{lightdm-gtk-greeter}) (type: greeter-session) +The greeter session to use, specified as a symbol. Currently, only +@code{lightdm-gtk-greeter} is supported. + +@item @code{xserver-command} (type: maybe-file-like) +The Xorg server command to run. + +@item @code{session-wrapper} (type: file-like) +The xinitrc session wrapper to use. + +@item @code{extra-config} (default: @code{()}) (type: list-of-strings) +Extra configuration values to append to the seat configuration section. + +@end table +@end deftp +@c %end of fragment + @cindex Xorg, configuration @deftp {Data Type} xorg-configuration |