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db4fdc04 LC |
1 | ;;; GNU Guix --- Functional package management for GNU |
2 | ;;; Copyright © 2013, 2014 Ludovic Courtès <ludo@gnu.org> | |
3 | ;;; | |
4 | ;;; This file is part of GNU Guix. | |
5 | ;;; | |
6 | ;;; GNU Guix is free software; you can redistribute it and/or modify it | |
7 | ;;; under the terms of the GNU General Public License as published by | |
8 | ;;; the Free Software Foundation; either version 3 of the License, or (at | |
9 | ;;; your option) any later version. | |
10 | ;;; | |
11 | ;;; GNU Guix is distributed in the hope that it will be useful, but | |
12 | ;;; WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | ;;; GNU General Public License for more details. | |
15 | ;;; | |
16 | ;;; You should have received a copy of the GNU General Public License | |
17 | ;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>. | |
18 | ||
19 | (define-module (gnu services base) | |
185f6691 LC |
20 | #:use-module ((guix store) |
21 | #:select (%store-prefix)) | |
db4fdc04 | 22 | #:use-module (gnu services) |
4a3b3b07 | 23 | #:use-module (gnu services networking) |
db4fdc04 LC |
24 | #:use-module (gnu system shadow) ; 'user-account', etc. |
25 | #:use-module (gnu system linux) ; 'pam-service', etc. | |
26 | #:use-module (gnu packages admin) | |
151a2c07 | 27 | #:use-module ((gnu packages linux) |
1b09031f | 28 | #:select (udev kbd e2fsprogs)) |
db4fdc04 | 29 | #:use-module ((gnu packages base) |
23ed63a1 | 30 | #:select (glibc-final)) |
db4fdc04 | 31 | #:use-module (gnu packages package-management) |
2c071ce9 LC |
32 | #:use-module ((guix build linux-initrd) |
33 | #:select (mount-flags->bit-mask)) | |
b5f4e686 | 34 | #:use-module (guix gexp) |
db4fdc04 LC |
35 | #:use-module (guix monads) |
36 | #:use-module (srfi srfi-1) | |
37 | #:use-module (srfi srfi-26) | |
38 | #:use-module (ice-9 format) | |
a00dd9fb | 39 | #:export (root-file-system-service |
023f391c | 40 | file-system-service |
a00dd9fb LC |
41 | user-processes-service |
42 | host-name-service | |
62ca0fdf | 43 | console-font-service |
151a2c07 | 44 | udev-service |
db4fdc04 LC |
45 | mingetty-service |
46 | nscd-service | |
47 | syslog-service | |
8b198abe LC |
48 | guix-service |
49 | %base-services)) | |
db4fdc04 LC |
50 | |
51 | ;;; Commentary: | |
52 | ;;; | |
53 | ;;; Base system services---i.e., services that 99% of the users will want to | |
54 | ;;; use. | |
55 | ;;; | |
56 | ;;; Code: | |
57 | ||
a00dd9fb LC |
58 | (define (root-file-system-service) |
59 | "Return a service whose sole purpose is to re-mount read-only the root file | |
60 | system upon shutdown (aka. cleanly \"umounting\" root.) | |
61 | ||
62 | This service must be the root of the service dependency graph so that its | |
63 | 'stop' action is invoked when dmd is the only process left." | |
a00dd9fb LC |
64 | (with-monad %store-monad |
65 | (return | |
66 | (service | |
67 | (documentation "Take care of the root file system.") | |
68 | (provision '(root-file-system)) | |
69 | (start #~(const #t)) | |
70 | (stop #~(lambda _ | |
71 | ;; Return #f if successfully stopped. | |
23ed63a1 | 72 | (sync) |
a00dd9fb LC |
73 | |
74 | (call-with-blocked-asyncs | |
75 | (lambda () | |
76 | (let ((null (%make-void-port "w"))) | |
77 | ;; Close 'dmd.log'. | |
78 | (display "closing log\n") | |
79 | ;; XXX: Ideally we'd use 'stop-logging', but that one | |
80 | ;; doesn't actually close the port as of dmd 0.1. | |
81 | (close-port (@@ (dmd comm) log-output-port)) | |
82 | (set! (@@ (dmd comm) log-output-port) null) | |
83 | ||
84 | ;; Redirect the default output ports.. | |
85 | (set-current-output-port null) | |
86 | (set-current-error-port null) | |
87 | ||
88 | ;; Close /dev/console. | |
89 | (for-each close-fdes '(0 1 2)) | |
90 | ||
23ed63a1 | 91 | ;; At this point, there are no open files left, so the |
a00dd9fb | 92 | ;; root file system can be re-mounted read-only. |
23ed63a1 LC |
93 | (mount #f "/" #f |
94 | (logior MS_REMOUNT MS_RDONLY) | |
95 | #:update-mtab? #f) | |
96 | ||
97 | #f))))) | |
a00dd9fb LC |
98 | (respawn? #f))))) |
99 | ||
023f391c | 100 | (define* (file-system-service device target type |
2c071ce9 LC |
101 | #:key (flags '()) (check? #t) |
102 | create-mount-point? options (title 'any)) | |
023f391c | 103 | "Return a service that mounts DEVICE on TARGET as a file system TYPE with |
d4c87617 LC |
104 | OPTIONS. TITLE is a symbol specifying what kind of name DEVICE is: 'label for |
105 | a partition label, 'device for a device file name, or 'any. When CHECK? is | |
4e469051 | 106 | true, check the file system before mounting it. When CREATE-MOUNT-POINT? is |
2c071ce9 LC |
107 | true, create TARGET if it does not exist yet. FLAGS is a list of symbols, |
108 | such as 'read-only' etc." | |
023f391c LC |
109 | (with-monad %store-monad |
110 | (return | |
111 | (service | |
112 | (provision (list (symbol-append 'file-system- (string->symbol target)))) | |
113 | (requirement '(root-file-system)) | |
114 | (documentation "Check, mount, and unmount the given file system.") | |
115 | (start #~(lambda args | |
d4c87617 | 116 | (let ((device (canonicalize-device-spec #$device '#$title))) |
4e469051 LC |
117 | #$(if create-mount-point? |
118 | #~(mkdir-p #$target) | |
119 | #~#t) | |
d4c87617 | 120 | #$(if check? |
1b09031f LC |
121 | #~(begin |
122 | ;; Make sure fsck.ext2 & co. can be found. | |
123 | (setenv "PATH" | |
124 | (string-append | |
125 | #$e2fsprogs "/sbin:" | |
126 | "/run/current-system/profile/sbin:" | |
127 | (getenv "PATH"))) | |
128 | (check-file-system device #$type)) | |
d4c87617 | 129 | #~#t) |
2c071ce9 LC |
130 | (mount device #$target #$type |
131 | #$(mount-flags->bit-mask flags) | |
132 | #$options)) | |
023f391c LC |
133 | #t)) |
134 | (stop #~(lambda args | |
135 | ;; Normally there are no processes left at this point, so | |
136 | ;; TARGET can be safely unmounted. | |
137 | (umount #$target) | |
138 | #f)))))) | |
139 | ||
7d57cfd3 LC |
140 | (define %do-not-kill-file |
141 | ;; Name of the file listing PIDs of processes that must survive when halting | |
142 | ;; the system. Typical example is user-space file systems. | |
143 | "/etc/dmd/do-not-kill") | |
144 | ||
023f391c | 145 | (define* (user-processes-service requirements #:key (grace-delay 2)) |
a00dd9fb LC |
146 | "Return the service that is responsible for terminating all the processes so |
147 | that the root file system can be re-mounted read-only, just before | |
148 | rebooting/halting. Processes still running GRACE-DELAY seconds after SIGTERM | |
149 | has been sent are terminated with SIGKILL. | |
150 | ||
023f391c LC |
151 | The returned service will depend on 'root-file-system' and on all the services |
152 | listed in REQUIREMENTS. | |
153 | ||
a00dd9fb LC |
154 | All the services that spawn processes must depend on this one so that they are |
155 | stopped before 'kill' is called." | |
156 | (with-monad %store-monad | |
157 | (return (service | |
158 | (documentation "When stopped, terminate all user processes.") | |
159 | (provision '(user-processes)) | |
023f391c | 160 | (requirement (cons 'root-file-system requirements)) |
a00dd9fb LC |
161 | (start #~(const #t)) |
162 | (stop #~(lambda _ | |
7d57cfd3 LC |
163 | (define (kill-except omit signal) |
164 | ;; Kill all the processes with SIGNAL except those | |
165 | ;; listed in OMIT and the current process. | |
166 | (let ((omit (cons (getpid) omit))) | |
167 | (for-each (lambda (pid) | |
168 | (unless (memv pid omit) | |
169 | (false-if-exception | |
170 | (kill pid signal)))) | |
171 | (processes)))) | |
172 | ||
173 | (define omitted-pids | |
174 | ;; List of PIDs that must not be killed. | |
175 | (if (file-exists? #$%do-not-kill-file) | |
176 | (map string->number | |
177 | (call-with-input-file #$%do-not-kill-file | |
178 | (compose string-tokenize | |
179 | (@ (ice-9 rdelim) read-string)))) | |
180 | '())) | |
181 | ||
a00dd9fb LC |
182 | ;; When this happens, all the processes have been |
183 | ;; killed, including 'deco', so DMD-OUTPUT-PORT and | |
184 | ;; thus CURRENT-OUTPUT-PORT are dangling. | |
185 | (call-with-output-file "/dev/console" | |
186 | (lambda (port) | |
187 | (display "sending all processes the TERM signal\n" | |
188 | port))) | |
189 | ||
7d57cfd3 LC |
190 | (if (null? omitted-pids) |
191 | (begin | |
192 | ;; Easy: terminate all of them. | |
193 | (kill -1 SIGTERM) | |
194 | (sleep #$grace-delay) | |
195 | (kill -1 SIGKILL)) | |
196 | (begin | |
197 | ;; Kill them all except OMITTED-PIDS. XXX: We | |
198 | ;; would like to (kill -1 SIGSTOP) to get a fixed | |
199 | ;; list of processes, like 'killall5' does, but | |
200 | ;; that seems unreliable. | |
201 | (kill-except omitted-pids SIGTERM) | |
202 | (sleep #$grace-delay) | |
203 | (kill-except omitted-pids SIGKILL) | |
204 | (delete-file #$%do-not-kill-file))) | |
a00dd9fb LC |
205 | |
206 | (display "all processes have been terminated\n") | |
207 | #f)) | |
208 | (respawn? #f))))) | |
209 | ||
db4fdc04 | 210 | (define (host-name-service name) |
51da7ca0 | 211 | "Return a service that sets the host name to @var{name}." |
db4fdc04 LC |
212 | (with-monad %store-monad |
213 | (return (service | |
214 | (documentation "Initialize the machine's host name.") | |
215 | (provision '(host-name)) | |
b5f4e686 LC |
216 | (start #~(lambda _ |
217 | (sethostname #$name))) | |
db4fdc04 LC |
218 | (respawn? #f))))) |
219 | ||
62ca0fdf LC |
220 | (define (unicode-start tty) |
221 | "Return a gexp to start Unicode support on @var{tty}." | |
222 | ||
223 | ;; We have to run 'unicode_start' in a pipe so that when it invokes the | |
224 | ;; 'tty' command, that command returns TTY. | |
225 | #~(begin | |
226 | (let ((pid (primitive-fork))) | |
227 | (case pid | |
228 | ((0) | |
229 | (close-fdes 0) | |
230 | (dup2 (open-fdes #$tty O_RDONLY) 0) | |
231 | (close-fdes 1) | |
232 | (dup2 (open-fdes #$tty O_WRONLY) 1) | |
233 | (execl (string-append #$kbd "/bin/unicode_start") | |
234 | "unicode_start")) | |
235 | (else | |
236 | (zero? (cdr (waitpid pid)))))))) | |
237 | ||
238 | (define* (console-font-service tty #:optional (font "LatGrkCyr-8x16")) | |
239 | "Return a service that sets up Unicode support in @var{tty} and loads | |
240 | @var{font} for that tty (fonts are per virtual console in Linux.)" | |
241 | ;; Note: 'LatGrkCyr-8x16' has the advantage of providing three common | |
242 | ;; scripts as well as glyphs for em dash, quotation marks, and other Unicode | |
243 | ;; codepoints notably found in the UTF-8 manual. | |
244 | (let ((device (string-append "/dev/" tty))) | |
245 | (with-monad %store-monad | |
246 | (return (service | |
247 | (documentation "Load a Unicode console font.") | |
248 | (provision (list (symbol-append 'console-font- | |
249 | (string->symbol tty)))) | |
250 | ||
251 | ;; Start after mingetty has been started on TTY, otherwise the | |
252 | ;; settings are ignored. | |
253 | (requirement (list (symbol-append 'term- | |
254 | (string->symbol tty)))) | |
255 | ||
256 | (start #~(lambda _ | |
257 | (and #$(unicode-start device) | |
258 | (zero? | |
259 | (system* (string-append #$kbd "/bin/setfont") | |
260 | "-C" #$device #$font))))) | |
261 | (stop #~(const #t)) | |
262 | (respawn? #f)))))) | |
263 | ||
db4fdc04 LC |
264 | (define* (mingetty-service tty |
265 | #:key | |
266 | (motd (text-file "motd" "Welcome.\n")) | |
52322163 LC |
267 | auto-login |
268 | login-program | |
269 | login-pause? | |
51da7ca0 LC |
270 | |
271 | ;; Allow empty passwords by default so that | |
272 | ;; first-time users can log in when the 'root' | |
273 | ;; account has just been created. | |
db4fdc04 | 274 | (allow-empty-passwords? #t)) |
52322163 LC |
275 | "Return a service to run mingetty on @var{tty}. |
276 | ||
277 | When @var{allow-empty-passwords?} is true, allow empty log-in password. When | |
278 | @var{auto-login} is true, it must be a user name under which to log-in | |
279 | automatically. @var{login-pause?} can be set to @code{#t} in conjunction with | |
280 | @var{auto-login}, in which case the user will have to press a key before the | |
281 | login shell is launched. | |
282 | ||
283 | When true, @var{login-program} is a gexp or a monadic gexp denoting the name | |
284 | of the log-in program (the default is the @code{login} program from the Shadow | |
285 | tool suite.) | |
286 | ||
287 | @var{motd} is a monadic value containing a text file to use as | |
51da7ca0 | 288 | the ``message of the day''." |
52322163 LC |
289 | (mlet %store-monad ((motd motd) |
290 | (login-program (cond ((gexp? login-program) | |
291 | (return login-program)) | |
292 | ((not login-program) | |
293 | (return #f)) | |
294 | (else | |
295 | login-program)))) | |
db4fdc04 LC |
296 | (return |
297 | (service | |
298 | (documentation (string-append "Run mingetty on " tty ".")) | |
299 | (provision (list (symbol-append 'term- (string->symbol tty)))) | |
300 | ||
301 | ;; Since the login prompt shows the host name, wait for the 'host-name' | |
302 | ;; service to be done. | |
a00dd9fb | 303 | (requirement '(user-processes host-name)) |
db4fdc04 | 304 | |
b5f4e686 | 305 | (start #~(make-forkexec-constructor |
1c6b445b LC |
306 | (list (string-append #$mingetty "/sbin/mingetty") |
307 | "--noclear" #$tty | |
308 | #$@(if auto-login | |
309 | #~("--autologin" #$auto-login) | |
310 | #~()) | |
311 | #$@(if login-program | |
312 | #~("--loginprog" #$login-program) | |
313 | #~()) | |
314 | #$@(if login-pause? | |
315 | #~("--loginpause") | |
316 | #~())))) | |
b5f4e686 | 317 | (stop #~(make-kill-destructor)) |
db4fdc04 LC |
318 | |
319 | (pam-services | |
320 | ;; Let 'login' be known to PAM. All the mingetty services will have | |
321 | ;; that PAM service, but that's fine because they're all identical and | |
322 | ;; duplicates are removed. | |
323 | (list (unix-pam-service "login" | |
324 | #:allow-empty-passwords? allow-empty-passwords? | |
325 | #:motd motd))))))) | |
326 | ||
327 | (define* (nscd-service #:key (glibc glibc-final)) | |
328 | "Return a service that runs libc's name service cache daemon (nscd)." | |
b5f4e686 | 329 | (with-monad %store-monad |
db4fdc04 LC |
330 | (return (service |
331 | (documentation "Run libc's name service cache daemon (nscd).") | |
332 | (provision '(nscd)) | |
a00dd9fb | 333 | (requirement '(user-processes)) |
4b2615e1 LC |
334 | |
335 | (activate #~(begin | |
336 | (use-modules (guix build utils)) | |
337 | (mkdir-p "/var/run/nscd"))) | |
338 | ||
1c6b445b LC |
339 | (start #~(make-forkexec-constructor |
340 | (list (string-append #$glibc "/sbin/nscd") | |
341 | "-f" "/dev/null" "--foreground"))) | |
b5f4e686 | 342 | (stop #~(make-kill-destructor)) |
db4fdc04 | 343 | |
b5f4e686 | 344 | (respawn? #f))))) |
db4fdc04 LC |
345 | |
346 | (define (syslog-service) | |
51da7ca0 | 347 | "Return a service that runs @code{syslogd} with reasonable default settings." |
db4fdc04 LC |
348 | |
349 | ;; Snippet adapted from the GNU inetutils manual. | |
350 | (define contents " | |
1f3fc60d | 351 | # Log all error messages, authentication messages of |
db4fdc04 LC |
352 | # level notice or higher and anything of level err or |
353 | # higher to the console. | |
354 | # Don't log private authentication messages! | |
6a191274 | 355 | *.alert;auth.notice;authpriv.none /dev/console |
db4fdc04 LC |
356 | |
357 | # Log anything (except mail) of level info or higher. | |
358 | # Don't log private authentication messages! | |
359 | *.info;mail.none;authpriv.none /var/log/messages | |
360 | ||
361 | # Same, in a different place. | |
362 | *.info;mail.none;authpriv.none /dev/tty12 | |
363 | ||
364 | # The authpriv file has restricted access. | |
365 | authpriv.* /var/log/secure | |
366 | ||
367 | # Log all the mail messages in one place. | |
368 | mail.* /var/log/maillog | |
369 | ") | |
370 | ||
371 | (mlet %store-monad | |
b5f4e686 | 372 | ((syslog.conf (text-file "syslog.conf" contents))) |
db4fdc04 LC |
373 | (return |
374 | (service | |
375 | (documentation "Run the syslog daemon (syslogd).") | |
376 | (provision '(syslogd)) | |
a00dd9fb | 377 | (requirement '(user-processes)) |
b5f4e686 | 378 | (start |
1c6b445b LC |
379 | #~(make-forkexec-constructor |
380 | (list (string-append #$inetutils "/libexec/syslogd") | |
381 | "--no-detach" "--rcfile" #$syslog.conf))) | |
b5f4e686 | 382 | (stop #~(make-kill-destructor)))))) |
db4fdc04 LC |
383 | |
384 | (define* (guix-build-accounts count #:key | |
ab6a279a | 385 | (group "guixbuild") |
db4fdc04 | 386 | (first-uid 30001) |
db4fdc04 LC |
387 | (shadow shadow)) |
388 | "Return a list of COUNT user accounts for Guix build users, with UIDs | |
389 | starting at FIRST-UID, and under GID." | |
390 | (with-monad %store-monad | |
391 | (return (unfold (cut > <> count) | |
392 | (lambda (n) | |
393 | (user-account | |
394 | (name (format #f "guixbuilder~2,'0d" n)) | |
459dd9ea | 395 | (system? #t) |
db4fdc04 | 396 | (uid (+ first-uid n -1)) |
ab6a279a | 397 | (group group) |
3d116a70 LC |
398 | |
399 | ;; guix-daemon expects GROUP to be listed as a | |
400 | ;; supplementary group too: | |
401 | ;; <http://lists.gnu.org/archive/html/bug-guix/2013-01/msg00239.html>. | |
402 | (supplementary-groups (list group)) | |
403 | ||
db4fdc04 LC |
404 | (comment (format #f "Guix Build User ~2d" n)) |
405 | (home-directory "/var/empty") | |
b5f4e686 | 406 | (shell #~(string-append #$shadow "/sbin/nologin")))) |
db4fdc04 LC |
407 | 1+ |
408 | 1)))) | |
409 | ||
2c5c696c LC |
410 | (define (hydra-key-authorization guix) |
411 | "Return a gexp with code to register the hydra.gnu.org public key with | |
412 | GUIX." | |
413 | #~(unless (file-exists? "/etc/guix/acl") | |
414 | (let ((pid (primitive-fork))) | |
415 | (case pid | |
416 | ((0) | |
417 | (let* ((key (string-append #$guix | |
418 | "/share/guix/hydra.gnu.org.pub")) | |
419 | (port (open-file key "r0b"))) | |
420 | (format #t "registering public key '~a'...~%" key) | |
421 | (close-port (current-input-port)) | |
2c5c696c LC |
422 | (dup port 0) |
423 | (execl (string-append #$guix "/bin/guix") | |
424 | "guix" "archive" "--authorize") | |
425 | (exit 1))) | |
426 | (else | |
427 | (let ((status (cdr (waitpid pid)))) | |
428 | (unless (zero? status) | |
429 | (format (current-error-port) "warning: \ | |
430 | failed to register hydra.gnu.org public key: ~a~%" status)))))))) | |
431 | ||
db4fdc04 | 432 | (define* (guix-service #:key (guix guix) (builder-group "guixbuild") |
c11a6eb1 LC |
433 | (build-accounts 10) authorize-hydra-key? |
434 | (use-substitutes? #t) | |
435 | (extra-options '())) | |
51da7ca0 LC |
436 | "Return a service that runs the build daemon from @var{guix}, and has |
437 | @var{build-accounts} user accounts available under @var{builder-group}. | |
2c5c696c | 438 | |
51da7ca0 LC |
439 | When @var{authorize-hydra-key?} is true, the @code{hydra.gnu.org} public key |
440 | provided by @var{guix} is authorized upon activation, meaning that substitutes | |
c11a6eb1 LC |
441 | from @code{hydra.gnu.org} are used by default. |
442 | ||
443 | If @var{use-substitutes?} is false, the daemon is run with | |
444 | @option{--no-substitutes} (@pxref{Invoking guix-daemon, | |
445 | @option{--no-substitutes}}). | |
446 | ||
447 | Finally, @var{extra-options} is a list of additional command-line options | |
448 | passed to @command{guix-daemon}." | |
185f6691 | 449 | (define activate |
e97c5be9 LC |
450 | ;; Assume that the store has BUILDER-GROUP as its group. We could |
451 | ;; otherwise call 'chown' here, but the problem is that on a COW unionfs, | |
452 | ;; chown leads to an entire copy of the tree, which is a bad idea. | |
185f6691 | 453 | |
e97c5be9 LC |
454 | ;; Optionally authorize hydra.gnu.org's key. |
455 | (and authorize-hydra-key? | |
456 | (hydra-key-authorization guix))) | |
185f6691 | 457 | |
b5f4e686 | 458 | (mlet %store-monad ((accounts (guix-build-accounts build-accounts |
ab6a279a | 459 | #:group builder-group))) |
db4fdc04 LC |
460 | (return (service |
461 | (provision '(guix-daemon)) | |
a00dd9fb | 462 | (requirement '(user-processes)) |
b5f4e686 | 463 | (start |
1c6b445b LC |
464 | #~(make-forkexec-constructor |
465 | (list (string-append #$guix "/bin/guix-daemon") | |
c11a6eb1 LC |
466 | "--build-users-group" #$builder-group |
467 | #$@(if use-substitutes? | |
468 | '() | |
469 | '("--no-substitutes")) | |
470 | #$@extra-options))) | |
b5f4e686 | 471 | (stop #~(make-kill-destructor)) |
db4fdc04 LC |
472 | (user-accounts accounts) |
473 | (user-groups (list (user-group | |
474 | (name builder-group) | |
41717509 | 475 | (system? #t) |
e97c5be9 LC |
476 | |
477 | ;; Use a fixed GID so that we can create the | |
478 | ;; store with the right owner. | |
479 | (id 30000)))) | |
185f6691 | 480 | (activate activate))))) |
db4fdc04 | 481 | |
151a2c07 LC |
482 | (define* (udev-service #:key (udev udev)) |
483 | "Run @var{udev}, which populates the @file{/dev} directory dynamically." | |
484 | (with-monad %store-monad | |
485 | (return (service | |
486 | (provision '(udev)) | |
a69576ea LC |
487 | |
488 | ;; Udev needs /dev to be a 'devtmpfs' mount so that new device | |
489 | ;; nodes can be added: see | |
490 | ;; <http://www.linuxfromscratch.org/lfs/view/development/chapter07/udev.html>. | |
7f239fd3 | 491 | (requirement '(root-file-system)) |
a69576ea LC |
492 | |
493 | (documentation "Populate the /dev directory, dynamically.") | |
151a2c07 | 494 | (start #~(lambda () |
1c6b445b LC |
495 | (define udevd |
496 | (string-append #$udev "/libexec/udev/udevd")) | |
497 | ||
ed09bb11 LC |
498 | (define (wait-for-udevd) |
499 | ;; Wait until someone's listening on udevd's control | |
500 | ;; socket. | |
501 | (let ((sock (socket AF_UNIX SOCK_SEQPACKET 0))) | |
502 | (let try () | |
503 | (catch 'system-error | |
504 | (lambda () | |
505 | (connect sock PF_UNIX "/run/udev/control") | |
506 | (close-port sock)) | |
507 | (lambda args | |
508 | (format #t "waiting for udevd...~%") | |
509 | (usleep 500000) | |
510 | (try)))))) | |
511 | ||
081c5b2d LC |
512 | ;; Allow udev to find the modules. |
513 | (setenv "LINUX_MODULE_DIRECTORY" | |
514 | "/run/booted-system/kernel/lib/modules") | |
515 | ||
151a2c07 LC |
516 | (let ((pid (primitive-fork))) |
517 | (case pid | |
518 | ((0) | |
1c6b445b | 519 | (exec-command (list udevd))) |
151a2c07 | 520 | (else |
ed09bb11 LC |
521 | ;; Wait until udevd is up and running. This |
522 | ;; appears to be needed so that the events | |
523 | ;; triggered below are actually handled. | |
524 | (wait-for-udevd) | |
525 | ||
526 | ;; Trigger device node creation. | |
527 | (system* (string-append #$udev "/bin/udevadm") | |
528 | "trigger" "--action=add") | |
529 | ||
081c5b2d LC |
530 | ;; Wait for things to settle down. |
531 | (system* (string-append #$udev "/bin/udevadm") | |
532 | "settle") | |
151a2c07 LC |
533 | pid))))) |
534 | (stop #~(make-kill-destructor)))))) | |
535 | ||
8b198abe LC |
536 | (define %base-services |
537 | ;; Convenience variable holding the basic services. | |
538 | (let ((motd (text-file "motd" " | |
539 | This is the GNU operating system, welcome!\n\n"))) | |
62ca0fdf LC |
540 | (list (console-font-service "tty1") |
541 | (console-font-service "tty2") | |
542 | (console-font-service "tty3") | |
543 | (console-font-service "tty4") | |
544 | (console-font-service "tty5") | |
545 | (console-font-service "tty6") | |
546 | ||
547 | (mingetty-service "tty1" #:motd motd) | |
8b198abe LC |
548 | (mingetty-service "tty2" #:motd motd) |
549 | (mingetty-service "tty3" #:motd motd) | |
550 | (mingetty-service "tty4" #:motd motd) | |
551 | (mingetty-service "tty5" #:motd motd) | |
552 | (mingetty-service "tty6" #:motd motd) | |
4a3b3b07 LC |
553 | (static-networking-service "lo" "127.0.0.1" |
554 | #:provision '(loopback)) | |
8b198abe LC |
555 | (syslog-service) |
556 | (guix-service) | |
151a2c07 LC |
557 | (nscd-service) |
558 | (udev-service)))) | |
8b198abe | 559 | |
db4fdc04 | 560 | ;;; base.scm ends here |