;;; GNU Guix --- Functional package management for GNU ;;; Copyright © 2017 Andy Wingo <wingo@igalia.com> ;;; Copyright © 2013, 2014, 2015, 2016, 2017 Ludovic Courtès <ludo@gnu.org> ;;; Copyright © 2015 Sou Bunnbu <iyzsong@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 services xorg) #:use-module (gnu artwork) #:use-module (gnu services) #:use-module (gnu services shepherd) #:use-module (gnu system pam) #:use-module (gnu services dbus) #:use-module ((gnu packages base) #:select (canonical-package)) #:use-module (gnu packages guile) #:use-module (gnu packages xorg) #:use-module (gnu packages gl) #:use-module (gnu packages display-managers) #:use-module (gnu packages gnustep) #:use-module (gnu packages gnome) #:use-module (gnu packages admin) #:use-module (gnu packages bash) #:use-module (gnu system shadow) #:use-module (guix gexp) #:use-module (guix store) #:use-module (guix packages) #:use-module (guix derivations) #:use-module (guix records) #:use-module (srfi srfi-1) #:use-module (srfi srfi-9) #:use-module (srfi srfi-26) #:use-module (ice-9 match) #:export (xorg-configuration-file %default-xorg-modules %default-xorg-fonts xorg-wrapper xorg-start-command xinitrc %default-slim-theme %default-slim-theme-name slim-configuration slim-configuration? slim-configuration-slim slim-configuration-allow-empty-passwords? slim-configuration-auto-login? slim-configuration-default-user slim-configuration-theme slim-configuration-theme-name slim-configuration-xauth slim-configuration-shepherd slim-configuration-auto-login-session slim-configuration-startx slim-service-type slim-service screen-locker screen-locker? screen-locker-service-type screen-locker-service gdm-configuration gdm-service-type gdm-service)) ;;; Commentary: ;;; ;;; Services that relate to the X Window System. ;;; ;;; Code: (define %default-xorg-modules ;; Default list of modules loaded by the server. Note that the order ;; matters since it determines which driver is going to be used when there's ;; a choice. (list xf86-video-vesa xf86-video-fbdev xf86-video-ati xf86-video-cirrus xf86-video-intel xf86-video-mach64 xf86-video-nouveau xf86-video-nv xf86-video-sis ;; Libinput is the new thing and is recommended over evdev/synaptics: ;; <http://who-t.blogspot.fr/2015/01/xf86-input-libinput-compatibility-with.html>. xf86-input-libinput xf86-input-evdev xf86-input-keyboard xf86-input-mouse xf86-input-synaptics)) (define %default-xorg-fonts ;; Default list of fonts available to the X server. (list (file-append font-alias "/share/fonts/X11/75dpi") (file-append font-alias "/share/fonts/X11/100dpi") (file-append font-alias "/share/fonts/X11/misc") (file-append font-alias "/share/fonts/X11/cyrillic") (file-append font-misc-misc ;default fonts for xterm "/share/fonts/X11/misc") (file-append font-adobe75dpi "/share/fonts/X11/75dpi"))) (define* (xorg-configuration-file #:key (modules %default-xorg-modules) (fonts %default-xorg-fonts) (drivers '()) (resolutions '()) (extra-config '())) "Return a configuration file for the Xorg server containing search paths for all the common drivers. @var{modules} must be a list of @dfn{module packages} loaded by the Xorg server---e.g., @code{xf86-video-vesa}, @code{xf86-input-keyboard}, and so on. @var{fonts} must be a list of font directories to add to the server's @dfn{font path}. @var{drivers} must be either the empty list, in which case Xorg chooses a graphics driver automatically, or a list of driver names that will be tried in this order---e.g., @code{(\"modesetting\" \"vesa\")}. Likewise, when @var{resolutions} is the empty list, Xorg chooses an appropriate screen resolution; otherwise, it must be a list of resolutions---e.g., @code{((1024 768) (640 480))}. Last, @var{extra-config} is a list of strings or objects appended to the configuration file. It is used to pass extra text to be added verbatim to the configuration file." (define all-modules ;; 'xorg-server' provides 'fbdevhw.so' etc. (append modules (list xorg-server))) (define build #~(begin (use-modules (ice-9 match) (srfi srfi-1) (srfi srfi-26)) (call-with-output-file #$output (lambda (port) (define drivers '#$drivers) (define (device-section driver) (string-append " Section \"Device\" Identifier \"device-" driver "\" Driver \"" driver "\" EndSection")) (define (screen-section driver resolutions) (string-append " Section \"Screen\" Identifier \"screen-" driver "\" Device \"device-" driver "\" SubSection \"Display\" Modes " (string-join (map (match-lambda ((x y) (string-append "\"" (number->string x) "x" (number->string y) "\""))) resolutions)) " EndSubSection EndSection")) (define (expand modules) ;; Append to MODULES the relevant /lib/xorg/modules ;; sub-directories. (append-map (lambda (module) (filter-map (lambda (directory) (let ((full (string-append module directory))) (and (file-exists? full) full))) '("/lib/xorg/modules/drivers" "/lib/xorg/modules/input" "/lib/xorg/modules/multimedia" "/lib/xorg/modules/extensions"))) modules)) (display "Section \"Files\"\n" port) (for-each (lambda (font) (format port " FontPath \"~a\"~%" font)) '#$fonts) (for-each (lambda (module) (format port " ModulePath \"~a\"~%" module)) (append (expand '#$all-modules) ;; For fbdevhw.so and so on. (list #$(file-append xorg-server "/lib/xorg/modules")))) (display "EndSection\n" port) (display " Section \"ServerFlags\" Option \"AllowMouseOpenFail\" \"on\" EndSection\n" port) (display (string-join (map device-section drivers) "\n") port) (newline port) (display (string-join (map (cut screen-section <> '#$resolutions) drivers) "\n") port) (newline port) (for-each (lambda (config) (display config port)) '#$extra-config))))) (computed-file "xserver.conf" build)) (define (xorg-configuration-directory modules) "Return a directory that contains the @code{.conf} files for X.org that includes the @code{share/X11/xorg.conf.d} directories of each package listed in @var{modules}." (with-imported-modules '((guix build utils)) (computed-file "xorg.conf.d" #~(begin (use-modules (guix build utils) (srfi srfi-1)) (define files (append-map (lambda (module) (find-files (string-append module "/share/X11/xorg.conf.d") "\\.conf$")) (list #$@modules))) (mkdir #$output) (for-each (lambda (file) (symlink file (string-append #$output "/" (basename file)))) files) #t)))) (define* (xorg-wrapper #:key (guile (canonical-package guile-2.0)) (modules %default-xorg-modules) (configuration-file (xorg-configuration-file #:modules modules)) (xorg-server xorg-server)) "Return a derivation that builds a @var{guile} script to start the X server from @var{xorg-server}. @var{configuration-file} is the server configuration file or a derivation that builds it; when omitted, the result of @code{xorg-configuration-file} is used. The resulting script should be used in place of @code{/usr/bin/X}." (define exp ;; Write a small wrapper around the X server. #~(begin (setenv "XORG_DRI_DRIVER_PATH" (string-append #$mesa "/lib/dri")) (setenv "XKB_BINDIR" (string-append #$xkbcomp "/bin")) (let ((X (string-append #$xorg-server "/bin/X"))) (apply execl X X "-xkbdir" (string-append #$xkeyboard-config "/share/X11/xkb") "-config" #$configuration-file "-configdir" #$(xorg-configuration-directory modules) (cdr (command-line)))))) (program-file "X-wrapper" exp)) (define* (xorg-start-command #:key (guile (canonical-package guile-2.0)) (modules %default-xorg-modules) (fonts %default-xorg-fonts) (configuration-file (xorg-configuration-file #:modules modules #:fonts fonts)) (xorg-server xorg-server)) "Return a @code{startx} script in which @var{modules}, a list of X module packages, and @var{fonts}, a list of X font directories, are available. See @code{xorg-wrapper} for more details on the arguments. The result should be used in place of @code{startx}." (define X (xorg-wrapper #:guile guile #:configuration-file configuration-file #:modules modules #:xorg-server xorg-server)) (define exp ;; Write a small wrapper around the X server. #~(apply execl #$X #$X ;; Second #$X is for argv[0]. "-logverbose" "-verbose" "-nolisten" "tcp" "-terminate" (cdr (command-line)))) (program-file "startx" exp)) (define* (xinitrc #:key (guile (canonical-package guile-2.0)) fallback-session) "Return a system-wide xinitrc script that starts the specified X session, which should be passed to this script as the first argument. If not, the @var{fallback-session} will be used or, if @var{fallback-session} is false, a desktop session from the system or user profile will be used." (define builder #~(begin (use-modules (ice-9 match) (ice-9 regex) (ice-9 ftw) (ice-9 rdelim) (srfi srfi-1) (srfi srfi-26)) (define (close-all-fdes) ;; Close all the open file descriptors except 0 to 2. (let loop ((fd 3)) (when (< fd 4096) ;FIXME: use sysconf + _SC_OPEN_MAX (false-if-exception (close-fdes fd)) (loop (+ 1 fd))))) (define (exec-from-login-shell command . args) ;; Run COMMAND from a login shell so that it gets to see the same ;; environment variables that one gets when logging in on a tty, for ;; instance. (let* ((pw (getpw (getuid))) (shell (passwd:shell pw))) ;; Close any open file descriptors. This is all the more ;; important that SLiM itself exec's us directly without closing ;; its own file descriptors! (close-all-fdes) ;; The '--login' option is supported at least by Bash and zsh. (execl shell shell "--login" "-c" (string-join (cons command args))))) (define system-profile "/run/current-system/profile") (define user-profile (and=> (getpw (getuid)) (lambda (pw) (string-append (passwd:dir pw) "/.guix-profile")))) (define (xsession-command desktop-file) ;; Read from DESKTOP-FILE its X session command and return it as a ;; list. (define exec-regexp (make-regexp "^[[:blank:]]*Exec=(.*)$")) (call-with-input-file desktop-file (lambda (port) (let loop () (match (read-line port) ((? eof-object?) #f) ((= (cut regexp-exec exec-regexp <>) result) (if result (string-tokenize (match:substring result 1)) (loop)))))))) (define (find-session profile) ;; Return an X session command from PROFILE or #f if none was found. (let ((directory (string-append profile "/share/xsessions"))) (match (scandir directory (cut string-suffix? ".desktop" <>)) ((or () #f) #f) ((sessions ...) (any xsession-command (map (cut string-append directory "/" <>) sessions)))))) (let* ((home (getenv "HOME")) (xsession-file (string-append home "/.xsession")) (session (match (command-line) ((_) #$(if fallback-session #~(list #$fallback-session) #f)) ((_ x ..1) x)))) (if (file-exists? xsession-file) ;; Run ~/.xsession when it exists. (apply exec-from-login-shell xsession-file (or session '())) ;; Otherwise, start the specified session or a fallback. (apply exec-from-login-shell (or session (find-session user-profile) (find-session system-profile))))))) (program-file "xinitrc" builder)) ;;; ;;; SLiM log-in manager. ;;; (define %default-slim-theme ;; Theme based on work by Felipe López. (file-append %artwork-repository "/slim")) (define %default-slim-theme-name ;; This must be the name of the sub-directory in %DEFAULT-SLIM-THEME that ;; contains the actual theme files. "0.x") (define-record-type* <slim-configuration> slim-configuration make-slim-configuration slim-configuration? (slim slim-configuration-slim (default slim)) (allow-empty-passwords? slim-configuration-allow-empty-passwords? (default #t)) (auto-login? slim-configuration-auto-login? (default #f)) (default-user slim-configuration-default-user (default "")) (theme slim-configuration-theme (default %default-slim-theme)) (theme-name slim-configuration-theme-name (default %default-slim-theme-name)) (xauth slim-configuration-xauth (default xauth)) (shepherd slim-configuration-shepherd (default shepherd)) (auto-login-session slim-configuration-auto-login-session (default #f)) (startx slim-configuration-startx (default (xorg-start-command))) (sessreg slim-configuration-sessreg (default sessreg))) (define (slim-pam-service config) "Return a PAM service for @command{slim}." (list (unix-pam-service "slim" #:allow-empty-passwords? (slim-configuration-allow-empty-passwords? config)))) (define (slim-shepherd-service config) (define slim.cfg (let ((xinitrc (xinitrc #:fallback-session (slim-configuration-auto-login-session config))) (slim (slim-configuration-slim config)) (xauth (slim-configuration-xauth config)) (startx (slim-configuration-startx config)) (shepherd (slim-configuration-shepherd config)) (theme-name (slim-configuration-theme-name config)) (sessreg (slim-configuration-sessreg config))) (mixed-text-file "slim.cfg" " default_path /run/current-system/profile/bin default_xserver " startx " xserver_arguments :0 vt7 xauth_path " xauth "/bin/xauth authfile /var/run/slim.auth # The login command. '%session' is replaced by the chosen session name, one # of the names specified in the 'sessions' setting: 'wmaker', 'xfce', etc. login_cmd exec " xinitrc " %session sessiondir /run/current-system/profile/share/xsessions session_msg session (F1 to change): sessionstart_cmd " sessreg "/bin/sessreg -a -l $DISPLAY %user sessionstop_cmd " sessreg "/bin/sessreg -d -l $DISPLAY %user halt_cmd " shepherd "/sbin/halt reboot_cmd " shepherd "/sbin/reboot\n" (if (slim-configuration-auto-login? config) (string-append "auto_login yes\ndefault_user " (slim-configuration-default-user config) "\n") "") (if theme-name (string-append "current_theme " theme-name "\n") "")))) (define theme (slim-configuration-theme config)) (list (shepherd-service (documentation "Xorg display server") (provision '(xorg-server)) (requirement '(user-processes host-name udev)) (start #~(lambda () ;; A stale lock file can prevent SLiM from starting, so remove it to ;; be on the safe side. (false-if-exception (delete-file "/var/run/slim.lock")) (fork+exec-command (list (string-append #$slim "/bin/slim") "-nodaemon") #:environment-variables (list (string-append "SLIM_CFGFILE=" #$slim.cfg) #$@(if theme (list #~(string-append "SLIM_THEMESDIR=" #$theme)) #~()))))) (stop #~(make-kill-destructor)) (respawn? #t)))) (define slim-service-type (service-type (name 'slim) (extensions (list (service-extension shepherd-root-service-type slim-shepherd-service) (service-extension pam-root-service-type slim-pam-service) ;; Unconditionally add xterm to the system profile, to ;; avoid bad surprises. (service-extension profile-service-type (const (list xterm))))) (default-value (slim-configuration)))) (define* (slim-service #:key (slim slim) ;deprecated (allow-empty-passwords? #t) auto-login? (default-user "") (theme %default-slim-theme) (theme-name %default-slim-theme-name) (xauth xauth) (shepherd shepherd) (auto-login-session #f) (startx (xorg-start-command))) "Return a service that spawns the SLiM graphical login manager, which in turn starts the X display server with @var{startx}, a command as returned by @code{xorg-start-command}. @cindex X session SLiM automatically looks for session types described by the @file{.desktop} files in @file{/run/current-system/profile/share/xsessions} and allows users to choose a session from the log-in screen using @kbd{F1}. Packages such as @var{xfce}, @var{sawfish}, and @var{ratpoison} provide @file{.desktop} files; adding them to the system-wide set of packages automatically makes them available at the log-in screen. In addition, @file{~/.xsession} files are honored. When available, @file{~/.xsession} must be an executable that starts a window manager and/or other X clients. When @var{allow-empty-passwords?} is true, allow logins with an empty password. When @var{auto-login?} is true, log in automatically as @var{default-user} with @var{auto-login-session}. If @var{theme} is @code{#f}, the use the default log-in theme; otherwise @var{theme} must be a gexp denoting the name of a directory containing the theme to use. In that case, @var{theme-name} specifies the name of the theme." (service slim-service-type (slim-configuration (slim slim) (allow-empty-passwords? allow-empty-passwords?) (auto-login? auto-login?) (default-user default-user) (theme theme) (theme-name theme-name) (xauth xauth) (shepherd shepherd) (auto-login-session auto-login-session) (startx startx)))) ;;; ;;; Screen lockers & co. ;;; (define-record-type <screen-locker> (screen-locker name program empty?) screen-locker? (name screen-locker-name) ;string (program screen-locker-program) ;gexp (empty? screen-locker-allows-empty-passwords?)) ;Boolean (define screen-locker-pam-services (match-lambda (($ <screen-locker> name _ empty?) (list (unix-pam-service name #:allow-empty-passwords? empty?))))) (define screen-locker-setuid-programs (compose list screen-locker-program)) (define screen-locker-service-type (service-type (name 'screen-locker) (extensions (list (service-extension pam-root-service-type screen-locker-pam-services) (service-extension setuid-program-service-type screen-locker-setuid-programs))))) (define* (screen-locker-service package #:optional (program (package-name package)) #:key allow-empty-passwords?) "Add @var{package}, a package for a screen locker or screen saver whose command is @var{program}, to the set of setuid programs and add a PAM entry for it. For example: @lisp (screen-locker-service xlockmore \"xlock\") @end lisp makes the good ol' XlockMore usable." (service screen-locker-service-type (screen-locker program (file-append package "/bin/" program) allow-empty-passwords?))) (define %gdm-accounts (list (user-group (name "gdm") (system? #t)) (user-account (name "gdm") (group "gdm") (system? #t) (comment "GNOME Display Manager user") (home-directory "/var/lib/gdm") (shell (file-append shadow "/sbin/nologin"))))) (define-record-type* <gdm-configuration> gdm-configuration make-gdm-configuration gdm-configuration? (gdm gdm-configuration-gdm (default gdm)) (allow-empty-passwords? gdm-configuration-allow-empty-passwords? (default #t)) (allow-root? gdm-configuration-allow-root? (default #t)) (auto-login? gdm-configuration-auto-login? (default #f)) (default-user gdm-configuration-default-user (default #f)) (x-server gdm-configuration-x-server)) (define (gdm-etc-service config) (define gdm-configuration-file (mixed-text-file "gdm-custom.conf" "[daemon]\n" "#User=gdm\n" "#Group=gdm\n" (if (gdm-configuration-auto-login? config) (string-append "AutomaticLoginEnable=true\n" "AutomaticLogin=" (or (gdm-configuration-default-user config) (error "missing default user for auto-login")) "\n") (string-append "AutomaticLoginEnable=false\n" "#AutomaticLogin=\n")) "#TimedLoginEnable=false\n" "#TimedLogin=\n" "#TimedLoginDelay=0\n" "#InitialSetupEnable=true\n" ;; Enable me once X is working. "WaylandEnable=false\n" "\n" "[debug]\n" "Enable=true\n" "\n" "[security]\n" "#DisallowTCP=true\n" "#AllowRemoteAutoLogin=false\n")) `(("gdm" ,(file-union "gdm" `(("custom.conf" ,gdm-configuration-file)))))) (define (gdm-pam-service config) "Return a PAM service for @command{gdm}." (list (pam-service (inherit (unix-pam-service "gdm-autologin")) (auth (list (pam-entry (control "[success=ok default=1]") (module (file-append (gdm-configuration-gdm config) "/lib/security/pam_gdm.so"))) (pam-entry (control "sufficient") (module "pam_permit.so"))))) (pam-service (inherit (unix-pam-service "gdm-launch-environment")) (auth (list (pam-entry (control "required") (module "pam_permit.so"))))) (unix-pam-service "gdm-password" #:allow-empty-passwords? (gdm-configuration-allow-empty-passwords? config) #:allow-root? (gdm-configuration-allow-root? config)))) (define (gdm-shepherd-service config) (list (shepherd-service (documentation "Xorg display server (GDM)") (provision '(xorg-server)) (requirement '(dbus-system user-processes host-name udev)) ;; While this service isn't working properly, turn off auto-start. (auto-start? #f) (start #~(lambda () (fork+exec-command (list #$(file-append (gdm-configuration-gdm config) "/bin/gdm")) #:environment-variables (list (string-append "GDM_X_SERVER=" #$(gdm-configuration-x-server config)) ;; XXX: GDM requires access to a handful of ;; programs and components from Gnome (gnome-shell, ;; dbus, and gnome-session among others). The ;; following variables only work provided Gnome is ;; installed. "XDG_DATA_DIRS=/run/current-system/profile/share" "PATH=/run/current-system/profile/bin")))) (stop #~(make-kill-destructor)) (respawn? #t)))) (define gdm-service-type (service-type (name 'gdm) (extensions (list (service-extension shepherd-root-service-type gdm-shepherd-service) (service-extension account-service-type (const %gdm-accounts)) (service-extension pam-root-service-type gdm-pam-service) (service-extension etc-service-type gdm-etc-service) (service-extension dbus-root-service-type (compose list gdm-configuration-gdm)))))) ;; This service isn't working yet; it gets as far as starting to run the ;; greeter from gnome-shell but doesn't get any further. It is here because ;; it doesn't hurt anyone and perhaps it inspires someone to fix it :) (define* (gdm-service #:key (gdm gdm) (allow-empty-passwords? #t) (x-server (xorg-wrapper))) "Return a service that spawns the GDM graphical login manager, which in turn starts the X display server with @var{X}, a command as returned by @code{xorg-wrapper}. @cindex X session GDM automatically looks for session types described by the @file{.desktop} files in @file{/run/current-system/profile/share/xsessions} and allows users to choose a session from the log-in screen using @kbd{F1}. Packages such as @var{xfce}, @var{sawfish}, and @var{ratpoison} provide @file{.desktop} files; adding them to the system-wide set of packages automatically makes them available at the log-in screen. In addition, @file{~/.xsession} files are honored. When available, @file{~/.xsession} must be an executable that starts a window manager and/or other X clients. When @var{allow-empty-passwords?} is true, allow logins with an empty password." (service gdm-service-type (gdm-configuration (gdm gdm) (allow-empty-passwords? allow-empty-passwords?) (x-server x-server)))) ;;; xorg.scm ends here