summaryrefslogtreecommitdiff
path: root/gnu/services/xorg.scm
blob: 812cb3f72546d762021f6c8b0d819d96c4cf6a79 (about) (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2013, 2014, 2015 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 dmd)
  #: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 gnustep)
  #:use-module (gnu packages admin)
  #:use-module (gnu packages bash)
  #:use-module (guix gexp)
  #:use-module (guix store)
  #:use-module (guix derivations)
  #:use-module (guix records)
  #:use-module (srfi srfi-1)
  #:use-module (srfi srfi-26)
  #:use-module (ice-9 match)
  #:export (xorg-configuration-file
            xorg-start-command
            %default-slim-theme
            %default-slim-theme-name
            slim-service))

;;; Commentary:
;;;
;;; Services that relate to the X Window System.
;;;
;;; Code:

(define* (xorg-configuration-file #:key (drivers '()) (resolutions '())
                                  (extra-config '()))
  "Return a configuration file for the Xorg server containing search paths for
all the common drivers.

@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
@code{mixed-text-file} argument list.  It is used to pass extra text to be
added verbatim to the configuration file."
  (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"))

  (apply mixed-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\"
  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-nouveau "/lib/xorg/modules/drivers\"
  ModulePath \"" xf86-video-nv "/lib/xorg/modules/drivers\"
  ModulePath \"" xf86-video-sis "/lib/xorg/modules/drivers\"

  # Libinput is the new thing and is recommended over evdev/synaptics
  # by those who know:
  # <http://who-t.blogspot.fr/2015/01/xf86-input-libinput-compatibility-with.html>.
  ModulePath \"" xf86-input-libinput "/lib/xorg/modules/input\"

  ModulePath \"" xf86-input-evdev "/lib/xorg/modules/input\"
  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") "\n"
  (string-join (map (cut screen-section <> resolutions)
                    drivers)
               "\n")

  "\n"
  extra-config))

(define* (xorg-start-command #:key
                             (guile (canonical-package guile-2.0))
                             (configuration-file (xorg-configuration-file))
                             (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.

Usually the X server is started by a login manager."
  (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"))

        (apply execl (string-append #$xorg-server "/bin/X")
               (string-append #$xorg-server "/bin/X") ;argv[0]
               "-logverbose" "-verbose"
               "-xkbdir" (string-append #$xkeyboard-config "/share/X11/xkb")
               "-config" #$configuration-file
               "-nolisten" "tcp" "-terminate"

               ;; Note: SLiM and other display managers add the
               ;; '-auth' flag by themselves.
               (cdr (command-line)))))

  (program-file "start-xorg" 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."
  (define builder
    #~(begin
        (use-modules (ice-9 match))

        (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)))))

        (let* ((home          (getenv "HOME"))
               (xsession-file (string-append home "/.xsession"))
               (session       (match (command-line)
                                ((_ x) x)
                                (_     #$fallback-session))))
          (if (file-exists? xsession-file)
              ;; Run ~/.xsession when it exists.
              (exec-from-login-shell xsession-file session)
              ;; Otherwise, start the specified session.
              (exec-from-login-shell session)))))
  (program-file "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.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?)
  (auto-login? slim-configuration-auto-login?)
  (default-user slim-configuration-default-user)
  (theme slim-configuration-theme)
  (theme-name slim-configuration-theme-name)
  (xauth slim-configuration-xauth
         (default xauth))
  (dmd slim-configuration-dmd
       (default dmd))
  (bash slim-configuration-bash
        (default bash))
  (auto-login-session slim-configuration-auto-login-session)
  (startx slim-configuration-startx))

(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-dmd-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))
          (dmd     (slim-configuration-dmd config))
          (theme-name (slim-configuration-theme-name 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):

halt_cmd " dmd "/sbin/halt
reboot_cmd " dmd "/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 (dmd-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 dmd-root-service-type
                                          slim-dmd-service)
                       (service-extension pam-root-service-type
                                          slim-pam-service)))))

(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)
                       (auto-login-session #~(string-append #$windowmaker
                                                            "/bin/wmaker"))
                       (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) (dmd dmd) (bash bash)
            (auto-login-session auto-login-session)
            (startx startx))))

;;; xorg.scm ends here