344 lines
13 KiB
Scheme
344 lines
13 KiB
Scheme
;;; GNU Guix --- Functional package management for GNU
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;;; Copyright © 2013, 2014, 2015 Ludovic Courtès <ludo@gnu.org>
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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 xorg)
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#:use-module (gnu artwork)
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#:use-module (gnu services)
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#:use-module (gnu system linux) ; 'pam-service'
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#:use-module ((gnu packages base) #:select (canonical-package))
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#:use-module (gnu packages guile)
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#:use-module (gnu packages xorg)
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#:use-module (gnu packages gl)
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#:use-module (gnu packages slim)
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#:use-module (gnu packages ratpoison)
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#:use-module (gnu packages gnustep)
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#:use-module (gnu packages sawfish)
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#:use-module (gnu packages admin)
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#:use-module (gnu packages bash)
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#:use-module (guix gexp)
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#:use-module (guix store)
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#:use-module (guix monads)
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#:use-module (guix derivations)
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#:use-module (guix records)
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#:use-module (srfi srfi-1)
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#:use-module (srfi srfi-26)
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#:use-module (ice-9 match)
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#:export (xorg-start-command
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%default-xsessions
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%ratpoison-session-type
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%windowmaker-session-type
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%sawfish-session-type
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session-type?
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session-type-name
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%default-slim-theme
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%default-slim-theme-name
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slim-service))
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;;; Commentary:
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;;;
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;;; Services that relate to the X Window System.
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;;;
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;;; Code:
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(define* (xorg-start-command #:key
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(guile (canonical-package guile-2.0))
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(xorg-server xorg-server)
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(drivers '()) (resolutions '()))
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"Return a derivation that builds a @var{guile} script to start the X server
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from @var{xorg-server}. Usually the X server is started by a login manager.
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@var{drivers} must be either the empty list, in which case Xorg chooses a
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graphics driver automatically, or a list of driver names that will be tried in
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this order---e.g., @code{(\"modesetting\" \"vesa\")}.
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Likewise, when @var{resolutions} is the empty list, Xorg chooses an
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appropriate screen resolution; otherwise, it must be a list of
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resolutions---e.g., @code{((1024 768) (640 480))}."
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(define (device-section driver)
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(string-append "
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Section \"Device\"
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Identifier \"device-" driver "\"
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Driver \"" driver "\"
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EndSection"))
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(define (screen-section driver resolutions)
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(string-append "
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Section \"Screen\"
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Identifier \"screen-" driver "\"
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Device \"device-" driver "\"
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SubSection \"Display\"
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Modes "
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(string-join (map (match-lambda
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((x y)
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(string-append "\"" (number->string x)
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"x" (number->string y) "\"")))
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resolutions)) "
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EndSubSection
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EndSection"))
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(define (xserver.conf)
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(text-file* "xserver.conf" "
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Section \"Files\"
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FontPath \"" font-adobe75dpi "/share/fonts/X11/75dpi\"
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ModulePath \"" xf86-video-vesa "/lib/xorg/modules/drivers\"
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ModulePath \"" xf86-video-fbdev "/lib/xorg/modules/drivers\"
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ModulePath \"" xf86-video-modesetting "/lib/xorg/modules/drivers\"
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ModulePath \"" xf86-video-cirrus "/lib/xorg/modules/drivers\"
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ModulePath \"" xf86-video-intel "/lib/xorg/modules/drivers\"
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ModulePath \"" xf86-video-mach64 "/lib/xorg/modules/drivers\"
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ModulePath \"" xf86-video-nouveau "/lib/xorg/modules/drivers\"
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ModulePath \"" xf86-video-nv "/lib/xorg/modules/drivers\"
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ModulePath \"" xf86-video-sis "/lib/xorg/modules/drivers\"
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ModulePath \"" xf86-input-evdev "/lib/xorg/modules/input\"
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ModulePath \"" xf86-input-keyboard "/lib/xorg/modules/input\"
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ModulePath \"" xf86-input-mouse "/lib/xorg/modules/input\"
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ModulePath \"" xf86-input-synaptics "/lib/xorg/modules/input\"
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ModulePath \"" xorg-server "/lib/xorg/modules\"
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ModulePath \"" xorg-server "/lib/xorg/modules/extensions\"
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ModulePath \"" xorg-server "/lib/xorg/modules/multimedia\"
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EndSection
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Section \"ServerFlags\"
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Option \"AllowMouseOpenFail\" \"on\"
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EndSection
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"
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(string-join (map device-section drivers) "\n")
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(string-join (map (cut screen-section <> resolutions)
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drivers)
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"\n")))
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(mlet %store-monad ((config (xserver.conf)))
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(define script
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;; Write a small wrapper around the X server.
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#~(begin
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(setenv "XORG_DRI_DRIVER_PATH" (string-append #$mesa "/lib/dri"))
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(setenv "XKB_BINDIR" (string-append #$xkbcomp "/bin"))
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(apply execl (string-append #$xorg-server "/bin/X")
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(string-append #$xorg-server "/bin/X") ;argv[0]
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"-logverbose" "-verbose"
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"-xkbdir" (string-append #$xkeyboard-config "/share/X11/xkb")
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"-config" #$config
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"-nolisten" "tcp" "-terminate"
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;; Note: SLiM and other display managers add the
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;; '-auth' flag by themselves.
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(cdr (command-line)))))
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(gexp->script "start-xorg" script)))
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(define* (xinitrc #:key
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(guile (canonical-package guile-2.0))
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fallback-session)
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"Return a system-wide xinitrc script that starts the specified X session,
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which should be passed to this script as the first argument. If not, the
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@var{fallback-session} will be used."
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(define builder
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#~(begin
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(use-modules (ice-9 match))
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(define (close-all-fdes)
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;; Close all the open file descriptors except 0 to 2.
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(let loop ((fd 3))
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(when (< fd 4096) ;FIXME: use sysconf + _SC_OPEN_MAX
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(false-if-exception (close-fdes fd))
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(loop (+ 1 fd)))))
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(define (exec-from-login-shell command . args)
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;; Run COMMAND from a login shell so that it gets to see the same
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;; environment variables that one gets when logging in on a tty, for
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;; instance.
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(let* ((pw (getpw (getuid)))
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(shell (passwd:shell pw))
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(st (stat command #f)))
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(when (and st (not (zero? (logand (stat:mode st) #o100))))
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;; Close any open file descriptors. This is all the more
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;; important that SLiM itself exec's us directly without closing
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;; its own file descriptors!
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(close-all-fdes)
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;; The '--login' option is supported at least by Bash and zsh.
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(execl shell shell "--login" "-c"
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(string-join (cons command args))))))
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(let ((home (getenv "HOME"))
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(session (match (command-line)
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((_ x) x)
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(_ #$fallback-session))))
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;; First, try to run ~/.xsession.
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(exec-from-login-shell (string-append home "/.xsession"))
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;; Then try to start the specified session.
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(exec-from-login-shell session))))
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(gexp->script "xinitrc" builder))
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;;;
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;;; SLiM log-in manager.
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;;;
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(define-record-type* <session-type> session-type make-session-type
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session-type?
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(name session-type-name) ;string
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(executable session-type-executable)) ;string-valued gexp
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(define %windowmaker-session-type
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(session-type
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(name "WindowMaker")
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(executable #~(string-append #$windowmaker "/bin/wmaker"))))
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(define %ratpoison-session-type
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(session-type
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(name "Ratpoison")
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(executable #~(string-append #$ratpoison "/bin/ratpoison"))))
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(define %sawfish-session-type
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(session-type
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(name "Sawfish")
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(executable #~(string-append #$sawfish "/bin/sawfish"))))
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(define %default-xsessions
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;; Default session types available to the log-in manager.
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(list %windowmaker-session-type %ratpoison-session-type))
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(define (xsessions-directory sessions)
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"Return a directory containing SESSIONS, a list of <session-type> objects.
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The alphabetical order of the files in that directory match the order of the
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elements in SESSIONS."
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(define builder
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#~(begin
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(use-modules (srfi srfi-1)
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(ice-9 format))
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(mkdir #$output)
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(chdir #$output)
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(fold (lambda (name executable number)
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;; Create file names such that the order of the items in
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;; SESSION is respected. SLiM gets them in lexicographic
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;; order and uses the first one as the default session.
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(let ((file (format #f "~2,'0d-~a.desktop"
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number (string-downcase name))))
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(call-with-output-file file
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(lambda (port)
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(format port "[Desktop Entry]
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Name=~a
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Exec=~a
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Type=Application~%"
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name executable)))
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(+ 1 number)))
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1
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'#$(map session-type-name sessions)
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(list #$@(map session-type-executable sessions)))))
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(gexp->derivation "xsessions-dir" builder))
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(define %default-slim-theme
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;; Theme based on work by Felipe López.
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#~(string-append #$%artwork-repository "/slim"))
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(define %default-slim-theme-name
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;; This must be the name of the sub-directory in %DEFAULT-SLIM-THEME that
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;; contains the actual theme files.
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"0.8")
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(define* (slim-service #:key (slim slim)
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(allow-empty-passwords? #t) auto-login?
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(default-user "")
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(theme %default-slim-theme)
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(theme-name %default-slim-theme-name)
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(xauth xauth) (dmd dmd) (bash bash)
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(sessions %default-xsessions)
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(auto-login-session #~(string-append #$windowmaker
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"/bin/wmaker"))
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startx)
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"Return a service that spawns the SLiM graphical login manager, which in
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turn starts the X display server with @var{startx}, a command as returned by
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@code{xorg-start-command}.
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When @var{allow-empty-passwords?} is true, allow logins with an empty
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password. When @var{auto-login?} is true, log in automatically as
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@var{default-user} with @var{auto-login-session}.
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If @var{theme} is @code{#f}, the use the default log-in theme; otherwise
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@var{theme} must be a gexp denoting the name of a directory containing the
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theme to use. In that case, @var{theme-name} specifies the name of the
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theme.
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Last, @var{session} is a list of @code{<session-type>} objects denoting the
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available session types that can be chosen from the log-in screen. The first
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one is chosen by default."
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(define (slim.cfg)
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(mlet %store-monad ((startx (or startx (xorg-start-command)))
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(xinitrc (xinitrc #:fallback-session
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auto-login-session))
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(sessiondir (xsessions-directory sessions)))
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(text-file* "slim.cfg" "
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default_path /run/current-system/profile/bin
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default_xserver " startx "
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xserver_arguments :0 vt7
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xauth_path " xauth "/bin/xauth
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authfile /var/run/slim.auth
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# The login command. '%session' is replaced by the chosen session name, one
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# of the names specified in the 'sessions' setting: 'wmaker', 'xfce', etc.
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login_cmd exec " xinitrc " %session
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sessiondir " sessiondir "
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session_msg session (F1 to change):
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halt_cmd " dmd "/sbin/halt
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reboot_cmd " dmd "/sbin/reboot
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"
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(if auto-login?
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(string-append "auto_login yes\ndefault_user " default-user "\n")
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"")
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(if theme-name
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(string-append "current_theme " theme-name "\n")
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""))))
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(mlet %store-monad ((slim.cfg (slim.cfg)))
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(return
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(service
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(documentation "Xorg display server")
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(provision '(xorg-server))
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(requirement '(user-processes host-name udev))
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(start
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#~(lambda ()
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;; A stale lock file can prevent SLiM from starting, so remove it
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;; to be on the safe side.
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(false-if-exception (delete-file "/var/run/slim.lock"))
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(fork+exec-command
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(list (string-append #$slim "/bin/slim") "-nodaemon")
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#:environment-variables
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(list (string-append "SLIM_CFGFILE=" #$slim.cfg)
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#$@(if theme
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(list #~(string-append "SLIM_THEMESDIR=" #$theme))
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#~())))))
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(stop #~(make-kill-destructor))
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(respawn? #t)
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(pam-services
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;; Tell PAM about 'slim'.
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(list (unix-pam-service
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"slim"
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#:allow-empty-passwords? allow-empty-passwords?)))))))
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;;; xorg.scm ends here
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