summary refs log tree commit diff
path: root/gnu/services/xorg.scm
blob: 46098da75edbcb18a1fd5d5f193495dd1c96192d (plain) (blame)
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
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2013, 2014, 2015 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 sawfish)
  #:use-module (gnu packages admin)
  #:use-module (gnu packages bash)
  #:use-module (guix gexp)
  #:use-module (guix store)
  #:use-module (guix monads)
  #: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-start-command
            %default-xsessions
            %ratpoison-session-type
            %windowmaker-session-type
            %sawfish-session-type

            session-type?
            session-type-name

            %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\"
  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-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")
  (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))
                  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 (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))))))

        (let ((home (getenv "HOME"))
              (session (match (command-line)
                         ((_ x) x)
                         (_     #$fallback-session))))
          ;; First, try to run ~/.xsession.
          (exec-from-login-shell (string-append home "/.xsession"))
          ;; Then try to start the specified session.
          (exec-from-login-shell session))))
  (gexp->script "xinitrc" builder))


;;;
;;; SLiM log-in manager.
;;;

(define-record-type* <session-type> session-type make-session-type
  session-type?
  (name         session-type-name)                ;string
  (executable   session-type-executable))         ;string-valued gexp

(define %windowmaker-session-type
  (session-type
   (name "WindowMaker")
   (executable #~(string-append #$windowmaker "/bin/wmaker"))))

(define %ratpoison-session-type
  (session-type
   (name "Ratpoison")
   (executable #~(string-append #$ratpoison "/bin/ratpoison"))))

(define %sawfish-session-type
  (session-type
   (name "Sawfish")
   (executable #~(string-append #$sawfish "/bin/sawfish"))))

(define %default-xsessions
  ;; Default session types available to the log-in manager.
  (list %windowmaker-session-type %ratpoison-session-type))

(define (xsessions-directory sessions)
  "Return a directory containing SESSIONS, a list of <session-type> objects."
  (define builder
    #~(begin
        (mkdir #$output)
        (chdir #$output)
        (for-each (lambda (name executable)
                    (let ((file (string-append (string-downcase name)
                                               ".desktop")))
                      (call-with-output-file file
                        (lambda (port)
                          (format port "[Desktop Entry]
Name=~a
Exec=~a
Type=Application~%"
                                  name executable)))))
                  '#$(map session-type-name sessions)
                  (list #$@(map session-type-executable sessions)))))

  (gexp->derivation "xsessions-dir" builder))

(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)
                       (sessions %default-xsessions)
                       (auto-login-session #~(string-append #$windowmaker
                                                            "/bin/wmaker"))
                       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} 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.

Last, @var{session} is a list of @code{<session-type>} objects denoting the
available session types that can be chosen from the log-in screen."

  (define (slim.cfg)
    (mlet %store-monad ((startx  (or startx (xorg-start-command)))
                        (xinitrc (xinitrc #:fallback-session
                                          auto-login-session))
                        (sessiondir (xsessions-directory sessions)))
      (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 " sessiondir "

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