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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2013, 2014 Ludovic Courtès <ludo@gnu.org>
;;;
;;; 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 system linux) ; 'pam-service'
#: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 slim)
#:use-module (gnu packages ratpoison)
#:use-module (gnu packages gnustep)
#:use-module (gnu packages admin)
#:use-module (gnu packages bash)
#:use-module (guix gexp)
#:use-module (guix monads)
#:use-module (guix derivations)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-26)
#:use-module (ice-9 match)
#:export (xorg-start-command
%default-slim-theme
%default-slim-theme-name
slim-service))
;;; Commentary:
;;;
;;; Services that relate to the X Window System.
;;;
;;; Code:
(define* (xorg-start-command #:key
(guile (canonical-package guile-2.0))
(xorg-server xorg-server)
(drivers '()) (resolutions '()))
"Return a derivation that builds a @var{guile} script to start the X server
from @var{xorg-server}. Usually the X server is started by a login manager.
@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))}."
(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 (xserver.conf)
(text-file* "xserver.conf" "
Section \"Files\"
FontPath \"" font-adobe75dpi "/share/fonts/X11/75dpi\"
ModulePath \"" xf86-video-vesa "/lib/xorg/modules/drivers\"
ModulePath \"" xf86-video-fbdev "/lib/xorg/modules/drivers\"
# FIXME: Commented out due to libdrm incompatibility.
# ModulePath \"" xf86-video-modesetting "/lib/xorg/modules/drivers\"
ModulePath \"" xf86-video-cirrus "/lib/xorg/modules/drivers\"
ModulePath \"" xf86-video-intel "/lib/xorg/modules/drivers\"
ModulePath \"" xf86-video-mach64 "/lib/xorg/modules/drivers\"
ModulePath \"" xf86-video-nv "/lib/xorg/modules/drivers\"
ModulePath \"" xf86-video-sis "/lib/xorg/modules/drivers\"
ModulePath \"" xf86-input-keyboard "/lib/xorg/modules/input\"
ModulePath \"" xf86-input-mouse "/lib/xorg/modules/input\"
ModulePath \"" xf86-input-synaptics "/lib/xorg/modules/input\"
ModulePath \"" xorg-server "/lib/xorg/modules\"
ModulePath \"" xorg-server "/lib/xorg/modules/extensions\"
ModulePath \"" xorg-server "/lib/xorg/modules/multimedia\"
EndSection
Section \"ServerFlags\"
Option \"AllowMouseOpenFail\" \"on\"
EndSection
"
(string-join (map device-section drivers) "\n")
(string-join (map (cut screen-section <> resolutions)
drivers)
"\n")))
(mlet %store-monad ((config (xserver.conf)))
(define script
;; 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"))
(apply execl (string-append #$xorg-server "/bin/X")
(string-append #$xorg-server "/bin/X") ;argv[0]
"-logverbose" "-verbose"
"-xkbdir" (string-append #$xkeyboard-config "/share/X11/xkb")
"-config" #$config
"-nolisten" "tcp" "-terminate"
;; Note: SLiM and other display managers add the
;; '-auth' flag by themselves.
(cdr (command-line)))))
(gexp->script "start-xorg" script)))
(define* (xinitrc #:key
(guile (canonical-package guile-2.0))
(ratpoison ratpoison)
(windowmaker windowmaker))
"Return a system-wide xinitrc script that starts the specified X session."
(define builder
#~(begin
(use-modules (ice-9 match))
(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))
(st (stat command #f)))
(when (and st (not (zero? (logand (stat:mode st) #o100))))
;; The '--login' option is supported at least by Bash and zsh.
(execl shell shell "--login" "-c"
(string-join (cons command args))))))
;; First, try to run ~/.xsession.
(let* ((home (getenv "HOME"))
(xsession (string-append home "/.xsession")))
(exec-from-login-shell xsession))
;; Then try a pre-configured session type.
(let ((ratpoison (string-append #$ratpoison "/bin/ratpoison"))
(wmaker (string-append #$windowmaker "/bin/wmaker")))
(match (command-line)
((_ "ratpoison")
(exec-from-login-shell ratpoison))
(_
(exec-from-login-shell wmaker))))))
(gexp->script "xinitrc" builder))
;;;
;;; SLiM log-in manager.
;;;
(define %default-slim-theme
;; Theme based on work by Felipe López.
#~(string-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.
"0.8")
(define* (slim-service #:key (slim slim)
(allow-empty-passwords? #t) auto-login?
(default-user "")
(theme %default-slim-theme)
(theme-name %default-slim-theme-name)
(xauth xauth) (dmd dmd) (bash bash)
startx)
"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}.
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}.
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."
(define (slim.cfg)
(mlet %store-monad ((startx (or startx (xorg-start-command)))
(xinitrc (xinitrc)))
(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
sessions wmaker,ratpoison
halt_cmd " dmd "/sbin/halt
reboot_cmd " dmd "/sbin/reboot
"
(if auto-login?
(string-append "auto_login yes\ndefault_user " default-user "\n")
"")
(if theme-name
(string-append "current_theme " theme-name "\n")
""))))
(mlet %store-monad ((slim.cfg (slim.cfg)))
(return
(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)
(pam-services
;; Tell PAM about 'slim'.
(list (unix-pam-service
"slim"
#:allow-empty-passwords? allow-empty-passwords?)))))))
;;; xorg.scm ends here
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