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db4fdc04 | 1 | ;;; GNU Guix --- Functional package management for GNU |
223ede4e | 2 | ;;; Copyright © 2015, 2016, 2017, 2018, 2019, 2020 Ludovic Courtès <ludo@gnu.org> |
4d343a14 | 3 | ;;; Copyright © 2016 Chris Marusich <cmmarusich@gmail.com> |
59bcffa3 | 4 | ;;; Copyright © 2020 Jan (janneke) Nieuwenhuizen <janneke@gnu.org> |
db4fdc04 LC |
5 | ;;; |
6 | ;;; This file is part of GNU Guix. | |
7 | ;;; | |
8 | ;;; GNU Guix is free software; you can redistribute it and/or modify it | |
9 | ;;; under the terms of the GNU General Public License as published by | |
10 | ;;; the Free Software Foundation; either version 3 of the License, or (at | |
11 | ;;; your option) any later version. | |
12 | ;;; | |
13 | ;;; GNU Guix is distributed in the hope that it will be useful, but | |
14 | ;;; WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | ;;; GNU General Public License for more details. | |
17 | ;;; | |
18 | ;;; You should have received a copy of the GNU General Public License | |
19 | ;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>. | |
20 | ||
21 | (define-module (gnu services) | |
bebc8681 | 22 | #:use-module (guix gexp) |
0adfe95a LC |
23 | #:use-module (guix monads) |
24 | #:use-module (guix store) | |
db4fdc04 | 25 | #:use-module (guix records) |
af4c3fd5 | 26 | #:use-module (guix profiles) |
0c0c1b21 | 27 | #:use-module (guix discovery) |
d466b1fc | 28 | #:use-module (guix combinators) |
33b7cb7a LC |
29 | #:use-module (guix channels) |
30 | #:use-module (guix describe) | |
0adfe95a LC |
31 | #:use-module (guix sets) |
32 | #:use-module (guix ui) | |
1bb895ea | 33 | #:use-module ((guix utils) #:select (source-properties->location)) |
232ccbef | 34 | #:use-module (guix modules) |
0adfe95a LC |
35 | #:use-module (gnu packages base) |
36 | #:use-module (gnu packages bash) | |
59bcffa3 | 37 | #:use-module (gnu packages hurd) |
0adfe95a LC |
38 | #:use-module (srfi srfi-1) |
39 | #:use-module (srfi srfi-9) | |
40 | #:use-module (srfi srfi-9 gnu) | |
41 | #:use-module (srfi srfi-26) | |
42 | #:use-module (srfi srfi-34) | |
43 | #:use-module (srfi srfi-35) | |
44 | #:use-module (ice-9 vlist) | |
45 | #:use-module (ice-9 match) | |
33b7cb7a | 46 | #:autoload (ice-9 pretty-print) (pretty-print) |
0adfe95a LC |
47 | #:export (service-extension |
48 | service-extension? | |
7d8b5913 CB |
49 | service-extension-target |
50 | service-extension-compute | |
0adfe95a LC |
51 | |
52 | service-type | |
53 | service-type? | |
5152d13b LC |
54 | service-type-name |
55 | service-type-extensions | |
56 | service-type-compose | |
57 | service-type-extend | |
1bb895ea | 58 | service-type-default-value |
b714395a LC |
59 | service-type-description |
60 | service-type-location | |
61 | ||
0c0c1b21 LC |
62 | %service-type-path |
63 | fold-service-types | |
49483f71 | 64 | lookup-service-types |
0adfe95a | 65 | |
db4fdc04 | 66 | service |
0adfe95a LC |
67 | service? |
68 | service-kind | |
efe7d19a LC |
69 | service-value |
70 | service-parameters ;deprecated | |
0adfe95a | 71 | |
71654dfd | 72 | simple-service |
cd6f6c22 | 73 | modify-services |
5152d13b | 74 | service-back-edges |
d466b1fc | 75 | instantiate-missing-services |
0adfe95a LC |
76 | fold-services |
77 | ||
78 | service-error? | |
1bb895ea LC |
79 | missing-value-service-error? |
80 | missing-value-service-error-type | |
81 | missing-value-service-error-location | |
0adfe95a LC |
82 | missing-target-service-error? |
83 | missing-target-service-error-service | |
84 | missing-target-service-error-target-type | |
85 | ambiguous-target-service-error? | |
86 | ambiguous-target-service-error-service | |
87 | ambiguous-target-service-error-target-type | |
88 | ||
d62e201c | 89 | system-service-type |
33b7cb7a | 90 | provenance-service-type |
0adfe95a | 91 | boot-service-type |
be7be9e8 | 92 | cleanup-service-type |
0adfe95a LC |
93 | activation-service-type |
94 | activation-service->script | |
a241a7ac | 95 | %linux-bare-metal-service |
68d8c094 JN |
96 | %hurd-rc-script |
97 | %hurd-startup-service | |
387e1754 LC |
98 | special-files-service-type |
99 | extra-special-file | |
0adfe95a LC |
100 | etc-service-type |
101 | etc-directory | |
102 | setuid-program-service-type | |
af4c3fd5 | 103 | profile-service-type |
0adfe95a | 104 | firmware-service-type |
e0b47290 | 105 | gc-root-service-type |
0adfe95a LC |
106 | |
107 | %boot-service | |
108 | %activation-service | |
d298c815 | 109 | etc-service)) |
0adfe95a LC |
110 | |
111 | ;;; Comment: | |
112 | ;;; | |
113 | ;;; This module defines a broad notion of "service types" and "services." | |
db4fdc04 | 114 | ;;; |
0adfe95a LC |
115 | ;;; A service type describe how its instances extend instances of other |
116 | ;;; service types. For instance, some services extend the instance of | |
117 | ;;; ACCOUNT-SERVICE-TYPE by providing it with accounts and groups to create; | |
d4053c71 AK |
118 | ;;; others extend SHEPHERD-ROOT-SERVICE-TYPE by passing it instances of |
119 | ;;; <shepherd-service>. | |
0adfe95a LC |
120 | ;;; |
121 | ;;; When applicable, the service type defines how it can itself be extended, | |
122 | ;;; by providing one procedure to compose extensions, and one procedure to | |
123 | ;;; extend itself. | |
124 | ;;; | |
d62e201c LC |
125 | ;;; A notable service type is SYSTEM-SERVICE-TYPE, which has a single |
126 | ;;; instance, which is the root of the service DAG. Its value is the | |
127 | ;;; derivation that produces the 'system' directory as returned by | |
128 | ;;; 'operating-system-derivation'. | |
0adfe95a LC |
129 | ;;; |
130 | ;;; The 'fold-services' procedure can be passed a list of procedures, which it | |
131 | ;;; "folds" by propagating extensions down the graph; it returns the root | |
132 | ;;; service after the applying all its extensions. | |
db4fdc04 LC |
133 | ;;; |
134 | ;;; Code: | |
135 | ||
0adfe95a LC |
136 | (define-record-type <service-extension> |
137 | (service-extension target compute) | |
138 | service-extension? | |
139 | (target service-extension-target) ;<service-type> | |
140 | (compute service-extension-compute)) ;params -> params | |
141 | ||
1bb895ea LC |
142 | (define &no-default-value |
143 | ;; Value used to denote service types that have no associated default value. | |
144 | '(no default value)) | |
145 | ||
0adfe95a LC |
146 | (define-record-type* <service-type> service-type make-service-type |
147 | service-type? | |
148 | (name service-type-name) ;symbol (for debugging) | |
149 | ||
150 | ;; Things extended by services of this type. | |
151 | (extensions service-type-extensions) ;list of <service-extensions> | |
152 | ||
153 | ;; Given a list of extensions, "compose" them. | |
154 | (compose service-type-compose ;list of Any -> Any | |
155 | (default #f)) | |
156 | ||
157 | ;; Extend the services' own parameters with the extension composition. | |
158 | (extend service-type-extend ;list of Any -> parameters | |
1bb895ea LC |
159 | (default #f)) |
160 | ||
161 | ;; Optional default value for instances of this type. | |
162 | (default-value service-type-default-value ;Any | |
b714395a LC |
163 | (default &no-default-value)) |
164 | ||
165 | ;; Meta-data. | |
166 | (description service-type-description ;string | |
167 | (default #f)) | |
168 | (location service-type-location ;<location> | |
169 | (default (and=> (current-source-location) | |
170 | source-properties->location)) | |
171 | (innate))) | |
0adfe95a LC |
172 | |
173 | (define (write-service-type type port) | |
174 | (format port "#<service-type ~a ~a>" | |
175 | (service-type-name type) | |
176 | (number->string (object-address type) 16))) | |
177 | ||
178 | (set-record-type-printer! <service-type> write-service-type) | |
179 | ||
0c0c1b21 LC |
180 | (define %distro-root-directory |
181 | ;; Absolute file name of the module hierarchy. | |
182 | (dirname (search-path %load-path "guix.scm"))) | |
183 | ||
184 | (define %service-type-path | |
185 | ;; Search path for service types. | |
186 | (make-parameter `((,%distro-root-directory . "gnu/services") | |
187 | (,%distro-root-directory . "gnu/system")))) | |
188 | ||
3943913f LC |
189 | (define (all-service-modules) |
190 | "Return the default set of service modules." | |
191 | (cons (resolve-interface '(gnu services)) | |
3c0128b0 LC |
192 | (all-modules (%service-type-path) |
193 | #:warn warn-about-load-error))) | |
3943913f | 194 | |
0c0c1b21 LC |
195 | (define* (fold-service-types proc seed |
196 | #:optional | |
3943913f | 197 | (modules (all-service-modules))) |
0c0c1b21 LC |
198 | "For each service type exported by one of MODULES, call (PROC RESULT). SEED |
199 | is used as the initial value of RESULT." | |
200 | (fold-module-public-variables (lambda (object result) | |
201 | (if (service-type? object) | |
202 | (proc object result) | |
203 | result)) | |
a3d37f3a | 204 | seed |
0c0c1b21 LC |
205 | modules)) |
206 | ||
49483f71 LC |
207 | (define lookup-service-types |
208 | (let ((table | |
209 | (delay (fold-service-types (lambda (type result) | |
210 | (vhash-consq (service-type-name type) | |
211 | type result)) | |
212 | vlist-null)))) | |
213 | (lambda (name) | |
214 | "Return the list of services with the given NAME (a symbol)." | |
215 | (vhash-foldq* cons '() name (force table))))) | |
216 | ||
0adfe95a LC |
217 | ;; Services of a given type. |
218 | (define-record-type <service> | |
1bb895ea | 219 | (make-service type value) |
db4fdc04 | 220 | service? |
0adfe95a | 221 | (type service-kind) |
efe7d19a LC |
222 | (value service-value)) |
223 | ||
1bb895ea LC |
224 | (define-syntax service |
225 | (syntax-rules () | |
226 | "Return a service instance of TYPE. The service value is VALUE or, if | |
227 | omitted, TYPE's default value." | |
228 | ((_ type value) | |
229 | (make-service type value)) | |
230 | ((_ type) | |
231 | (%service-with-default-value (current-source-location) | |
232 | type)))) | |
233 | ||
234 | (define (%service-with-default-value location type) | |
235 | "Return a instance of service type TYPE with its default value, if any. If | |
236 | TYPE does not have a default value, an error is raised." | |
237 | ;; TODO: Currently this is a run-time error but with a little bit macrology | |
238 | ;; we could turn it into an expansion-time error. | |
239 | (let ((default (service-type-default-value type))) | |
240 | (if (eq? default &no-default-value) | |
241 | (let ((location (source-properties->location location))) | |
242 | (raise | |
243 | (condition | |
244 | (&missing-value-service-error (type type) (location location)) | |
245 | (&message | |
69daee23 | 246 | (message (format #f (G_ "~a: no value specified \ |
1bb895ea LC |
247 | for service of type '~a'") |
248 | (location->string location) | |
249 | (service-type-name type))))))) | |
250 | (service type default)))) | |
251 | ||
252 | (define-condition-type &service-error &error | |
253 | service-error?) | |
254 | ||
255 | (define-condition-type &missing-value-service-error &service-error | |
256 | missing-value-service-error? | |
257 | (type missing-value-service-error-type) | |
258 | (location missing-value-service-error-location)) | |
259 | ||
260 | ||
261 | \f | |
262 | ;;; | |
263 | ;;; Helpers. | |
264 | ;;; | |
265 | ||
efe7d19a LC |
266 | (define service-parameters |
267 | ;; Deprecated alias. | |
268 | service-value) | |
0adfe95a | 269 | |
71654dfd LC |
270 | (define (simple-service name target value) |
271 | "Return a service that extends TARGET with VALUE. This works by creating a | |
272 | singleton service type NAME, of which the returned service is an instance." | |
273 | (let* ((extension (service-extension target identity)) | |
274 | (type (service-type (name name) | |
275 | (extensions (list extension))))) | |
276 | (service type value))) | |
0adfe95a | 277 | |
cd6f6c22 LC |
278 | (define-syntax %modify-service |
279 | (syntax-rules (=>) | |
280 | ((_ service) | |
281 | service) | |
282 | ((_ svc (kind param => exp ...) clauses ...) | |
283 | (if (eq? (service-kind svc) kind) | |
efe7d19a | 284 | (let ((param (service-value svc))) |
cd6f6c22 LC |
285 | (service (service-kind svc) |
286 | (begin exp ...))) | |
287 | (%modify-service svc clauses ...))))) | |
288 | ||
289 | (define-syntax modify-services | |
290 | (syntax-rules () | |
4d343a14 CM |
291 | "Modify the services listed in SERVICES according to CLAUSES and return |
292 | the resulting list of services. Each clause must have the form: | |
cd6f6c22 LC |
293 | |
294 | (TYPE VARIABLE => BODY) | |
295 | ||
296 | where TYPE is a service type, such as 'guix-service-type', and VARIABLE is an | |
297 | identifier that is bound within BODY to the value of the service of that | |
298 | TYPE. Consider this example: | |
299 | ||
300 | (modify-services %base-services | |
301 | (guix-service-type config => | |
302 | (guix-configuration | |
303 | (inherit config) | |
304 | (use-substitutes? #f) | |
305 | (extra-options '(\"--gc-keep-derivations\")))) | |
306 | (mingetty-service-type config => | |
307 | (mingetty-configuration | |
308 | (inherit config) | |
309 | (motd (plain-file \"motd\" \"Hi there!\"))))) | |
310 | ||
311 | It changes the configuration of the GUIX-SERVICE-TYPE instance, and that of | |
312 | all the MINGETTY-SERVICE-TYPE instances. | |
313 | ||
314 | This is a shorthand for (map (lambda (svc) ...) %base-services)." | |
315 | ((_ services clauses ...) | |
316 | (map (lambda (service) | |
317 | (%modify-service service clauses ...)) | |
318 | services)))) | |
0adfe95a LC |
319 | |
320 | \f | |
321 | ;;; | |
322 | ;;; Core services. | |
323 | ;;; | |
324 | ||
0e5c2d5e | 325 | (define (system-derivation entries mextensions) |
d62e201c LC |
326 | "Return as a monadic value the derivation of the 'system' directory |
327 | containing the given entries." | |
0e5c2d5e | 328 | (mlet %store-monad ((extensions (mapm/accumulate-builds identity |
223ede4e | 329 | mextensions))) |
d62e201c LC |
330 | (lower-object |
331 | (file-union "system" | |
332 | (append entries (concatenate extensions)))))) | |
333 | ||
334 | (define system-service-type | |
335 | ;; This is the ultimate service type, the root of the service DAG. The | |
336 | ;; service of this type is extended by monadic name/item pairs. These items | |
337 | ;; end up in the "system directory" as returned by | |
338 | ;; 'operating-system-derivation'. | |
339 | (service-type (name 'system) | |
340 | (extensions '()) | |
341 | (compose identity) | |
636bb2b5 LC |
342 | (extend system-derivation) |
343 | (description | |
344 | "Build the operating system top-level directory, which in | |
345 | turn refers to everything the operating system needs: its kernel, initrd, | |
346 | system profile, boot script, and so on."))) | |
d62e201c | 347 | |
378daa8c LC |
348 | (define (compute-boot-script _ gexps) |
349 | ;; Reverse GEXPS so that extensions appear in the boot script in the right | |
661c237b LC |
350 | ;; order. That is, user extensions would come first, and extensions added |
351 | ;; by 'essential-services' (e.g., running shepherd) are guaranteed to come | |
352 | ;; last. | |
378daa8c LC |
353 | (gexp->file "boot" |
354 | ;; Clean up and activate the system, then spawn shepherd. | |
355 | #~(begin #$@(reverse gexps)))) | |
0adfe95a | 356 | |
d62e201c LC |
357 | (define (boot-script-entry mboot) |
358 | "Return, as a monadic value, an entry for the boot script in the system | |
359 | directory." | |
360 | (mlet %store-monad ((boot mboot)) | |
361 | (return `(("boot" ,boot))))) | |
362 | ||
0adfe95a | 363 | (define boot-service-type |
378daa8c LC |
364 | ;; The service of this type is extended by being passed gexps. It |
365 | ;; aggregates them in a single script, as a monadic value, which becomes its | |
366 | ;; value. | |
0adfe95a | 367 | (service-type (name 'boot) |
d62e201c LC |
368 | (extensions |
369 | (list (service-extension system-service-type | |
370 | boot-script-entry))) | |
7874e9e0 | 371 | (compose identity) |
636bb2b5 LC |
372 | (extend compute-boot-script) |
373 | (description | |
374 | "Produce the operating system's boot script, which is spawned | |
375 | by the initrd once the root file system is mounted."))) | |
0adfe95a LC |
376 | |
377 | (define %boot-service | |
d62e201c | 378 | ;; The service that produces the boot script. |
0adfe95a | 379 | (service boot-service-type #t)) |
be7be9e8 | 380 | |
33b7cb7a LC |
381 | \f |
382 | ;;; | |
383 | ;;; Provenance tracking. | |
384 | ;;; | |
385 | ||
386 | (define (object->pretty-string obj) | |
387 | "Like 'object->string', but using 'pretty-print'." | |
388 | (call-with-output-string | |
389 | (lambda (port) | |
390 | (pretty-print obj port)))) | |
391 | ||
392 | (define (channel->code channel) | |
393 | "Return code to build CHANNEL, ready to be dropped in a 'channels.scm' | |
394 | file." | |
395 | `(channel (name ',(channel-name channel)) | |
396 | (url ,(channel-url channel)) | |
397 | (branch ,(channel-branch channel)) | |
398 | (commit ,(channel-commit channel)))) | |
399 | ||
400 | (define (channel->sexp channel) | |
401 | "Return an sexp describing CHANNEL. The sexp is _not_ code and is meant to | |
402 | be parsed by tools; it's potentially more future-proof than code." | |
403 | `(channel (name ,(channel-name channel)) | |
404 | (url ,(channel-url channel)) | |
405 | (branch ,(channel-branch channel)) | |
406 | (commit ,(channel-commit channel)))) | |
407 | ||
408 | (define (provenance-file channels config-file) | |
409 | "Return a 'provenance' file describing CHANNELS, a list of channels, and | |
410 | CONFIG-FILE, which can be either #f or a <local-file> containing the OS | |
411 | configuration being used." | |
412 | (scheme-file "provenance" | |
413 | #~(provenance | |
414 | (version 0) | |
415 | (channels #+@(if channels | |
416 | (map channel->sexp channels) | |
417 | '())) | |
418 | (configuration-file #+config-file)))) | |
419 | ||
420 | (define (provenance-entry config-file) | |
421 | "Return system entries describing the operating system provenance: the | |
422 | channels in use and CONFIG-FILE, if it is true." | |
423 | (define profile | |
424 | (current-profile)) | |
425 | ||
426 | (define channels | |
427 | (and=> profile profile-channels)) | |
428 | ||
429 | (mbegin %store-monad | |
430 | (let ((config-file (cond ((string? config-file) | |
431 | (local-file config-file "configuration.scm")) | |
432 | ((not config-file) | |
433 | #f) | |
434 | (else | |
435 | config-file)))) | |
436 | (return `(("provenance" ,(provenance-file channels config-file)) | |
437 | ,@(if channels | |
438 | `(("channels.scm" | |
439 | ,(plain-file "channels.scm" | |
440 | (object->pretty-string | |
441 | `(list | |
442 | ,@(map channel->code channels)))))) | |
443 | '()) | |
444 | ,@(if config-file | |
445 | `(("configuration.scm" ,config-file)) | |
446 | '())))))) | |
447 | ||
448 | (define provenance-service-type | |
449 | (service-type (name 'provenance) | |
450 | (extensions | |
451 | (list (service-extension system-service-type | |
452 | provenance-entry))) | |
453 | (default-value #f) ;the OS config file | |
454 | (description | |
455 | "Store provenance information about the system in the system | |
456 | itself: the channels used when building the system, and its configuration | |
457 | file, when available."))) | |
458 | ||
459 | \f | |
460 | ;;; | |
461 | ;;; Cleanup. | |
462 | ;;; | |
463 | ||
be7be9e8 | 464 | (define (cleanup-gexp _) |
378daa8c LC |
465 | "Return a gexp to clean up /tmp and similar places upon boot." |
466 | (with-imported-modules '((guix build utils)) | |
467 | #~(begin | |
468 | (use-modules (guix build utils)) | |
469 | ||
470 | ;; Clean out /tmp and /var/run. | |
471 | ;; | |
472 | ;; XXX This needs to happen before service activations, so it | |
473 | ;; has to be here, but this also implicitly assumes that /tmp | |
474 | ;; and /var/run are on the root partition. | |
475 | (letrec-syntax ((fail-safe (syntax-rules () | |
476 | ((_ exp rest ...) | |
477 | (begin | |
478 | (catch 'system-error | |
479 | (lambda () exp) | |
480 | (const #f)) | |
481 | (fail-safe rest ...))) | |
482 | ((_) | |
483 | #t)))) | |
484 | ;; Ignore I/O errors so the system can boot. | |
485 | (fail-safe | |
486 | ;; Remove stale Shadow lock files as they would lead to | |
487 | ;; failures of 'useradd' & co. | |
488 | (delete-file "/etc/group.lock") | |
489 | (delete-file "/etc/passwd.lock") | |
490 | (delete-file "/etc/.pwd.lock") ;from 'lckpwdf' | |
491 | ||
492 | ;; Force file names to be decoded as UTF-8. See | |
493 | ;; <https://bugs.gnu.org/26353>. | |
494 | (setenv "GUIX_LOCPATH" | |
495 | #+(file-append glibc-utf8-locales "/lib/locale")) | |
496 | (setlocale LC_CTYPE "en_US.utf8") | |
497 | (delete-file-recursively "/tmp") | |
498 | (delete-file-recursively "/var/run") | |
499 | ||
500 | (mkdir "/tmp") | |
501 | (chmod "/tmp" #o1777) | |
502 | (mkdir "/var/run") | |
503 | (chmod "/var/run" #o755) | |
504 | (delete-file-recursively "/run/udev/watch.old")))))) | |
be7be9e8 LC |
505 | |
506 | (define cleanup-service-type | |
507 | ;; Service that cleans things up in /tmp and similar. | |
508 | (service-type (name 'cleanup) | |
509 | (extensions | |
510 | (list (service-extension boot-service-type | |
636bb2b5 LC |
511 | cleanup-gexp))) |
512 | (description | |
513 | "Delete files from @file{/tmp}, @file{/var/run}, and other | |
514 | temporary locations at boot time."))) | |
0adfe95a | 515 | |
0adfe95a LC |
516 | (define* (activation-service->script service) |
517 | "Return as a monadic value the activation script for SERVICE, a service of | |
518 | ACTIVATION-SCRIPT-TYPE." | |
efe7d19a | 519 | (activation-script (service-value service))) |
0adfe95a LC |
520 | |
521 | (define (activation-script gexps) | |
522 | "Return the system's activation script, which evaluates GEXPS." | |
378daa8c | 523 | (define actions |
03cbd94d JK |
524 | (map (cut program-file "activate-service.scm" <>) gexps)) |
525 | ||
526 | (program-file "activate.scm" | |
527 | (with-imported-modules (source-module-closure | |
528 | '((gnu build activation) | |
529 | (guix build utils))) | |
530 | #~(begin | |
531 | (use-modules (gnu build activation) | |
532 | (guix build utils)) | |
533 | ||
534 | ;; Make sure the user accounting database exists. If it | |
535 | ;; does not exist, 'setutxent' does not create it and | |
536 | ;; thus there is no accounting at all. | |
537 | (close-port (open-file "/var/run/utmpx" "a0")) | |
538 | ||
539 | ;; Same for 'wtmp', which is populated by mingetty et | |
540 | ;; al. | |
541 | (mkdir-p "/var/log") | |
542 | (close-port (open-file "/var/log/wtmp" "a0")) | |
543 | ||
544 | ;; Set up /run/current-system. Among other things this | |
545 | ;; sets up locales, which the activation snippets | |
546 | ;; executed below may expect. | |
547 | (activate-current-system) | |
548 | ||
549 | ;; Run the services' activation snippets. | |
550 | ;; TODO: Use 'load-compiled'. | |
551 | (for-each primitive-load '#$actions))))) | |
0adfe95a LC |
552 | |
553 | (define (gexps->activation-gexp gexps) | |
554 | "Return a gexp that runs the activation script containing GEXPS." | |
378daa8c | 555 | #~(primitive-load #$(activation-script gexps))) |
0adfe95a | 556 | |
3a391e68 LC |
557 | (define (second-argument a b) b) |
558 | ||
0adfe95a LC |
559 | (define activation-service-type |
560 | (service-type (name 'activate) | |
561 | (extensions | |
562 | (list (service-extension boot-service-type | |
563 | gexps->activation-gexp))) | |
7874e9e0 | 564 | (compose identity) |
636bb2b5 LC |
565 | (extend second-argument) |
566 | (description | |
567 | "Run @dfn{activation} code at boot time and upon | |
568 | @command{guix system reconfigure} completion."))) | |
0adfe95a LC |
569 | |
570 | (define %activation-service | |
571 | ;; The activation service produces the activation script from the gexps it | |
572 | ;; receives. | |
573 | (service activation-service-type #t)) | |
574 | ||
a241a7ac LC |
575 | (define %modprobe-wrapper |
576 | ;; Wrapper for the 'modprobe' command that knows where modules live. | |
577 | ;; | |
578 | ;; This wrapper is typically invoked by the Linux kernel ('call_modprobe', | |
579 | ;; in kernel/kmod.c), a situation where the 'LINUX_MODULE_DIRECTORY' | |
580 | ;; environment variable is not set---hence the need for this wrapper. | |
581 | (let ((modprobe "/run/current-system/profile/bin/modprobe")) | |
582 | (program-file "modprobe" | |
583 | #~(begin | |
584 | (setenv "LINUX_MODULE_DIRECTORY" | |
585 | "/run/booted-system/kernel/lib/modules") | |
8c88e242 BW |
586 | ;; FIXME: Remove this crutch when the patch #40422, |
587 | ;; updating to kmod 27 is merged. | |
588 | (setenv "MODPROBE_OPTIONS" | |
589 | "-C /etc/modprobe.d") | |
a241a7ac LC |
590 | (apply execl #$modprobe |
591 | (cons #$modprobe (cdr (command-line)))))))) | |
592 | ||
593 | (define %linux-kernel-activation | |
594 | ;; Activation of the Linux kernel running on the bare metal (as opposed to | |
595 | ;; running in a container.) | |
596 | #~(begin | |
597 | ;; Tell the kernel to use our 'modprobe' command. | |
598 | (activate-modprobe #$%modprobe-wrapper) | |
599 | ||
600 | ;; Let users debug their own processes! | |
601 | (activate-ptrace-attach))) | |
602 | ||
a241a7ac LC |
603 | (define %linux-bare-metal-service |
604 | ;; The service that does things that are needed on the "bare metal", but not | |
605 | ;; necessary or impossible in a container. | |
6ddf4fcf LC |
606 | (simple-service 'linux-bare-metal |
607 | activation-service-type | |
608 | %linux-kernel-activation)) | |
609 | ||
68d8c094 JN |
610 | (define %hurd-rc-script |
611 | ;; The RC script to be started upon boot. | |
612 | (program-file "rc" | |
613 | (with-imported-modules (source-module-closure | |
614 | '((guix build utils) | |
615 | (gnu build hurd-boot) | |
616 | (guix build syscalls))) | |
617 | #~(begin | |
618 | (use-modules (guix build utils) | |
619 | (gnu build hurd-boot) | |
620 | (guix build syscalls) | |
621 | (ice-9 match) | |
622 | (system repl repl) | |
623 | (srfi srfi-1) | |
624 | (srfi srfi-26)) | |
625 | (boot-hurd-system))))) | |
626 | ||
627 | (define (hurd-rc-entry rc) | |
628 | "Return, as a monadic value, an entry for the RC script in the system | |
629 | directory." | |
630 | (mlet %store-monad ((rc (lower-object rc))) | |
631 | (return `(("rc" ,rc))))) | |
632 | ||
633 | (define hurd-startup-service-type | |
634 | ;; The service that creates the initial SYSTEM/rc startup file. | |
635 | (service-type (name 'startup) | |
636 | (extensions | |
637 | (list (service-extension system-service-type hurd-rc-entry))) | |
638 | (default-value %hurd-rc-script))) | |
639 | ||
640 | (define %hurd-startup-service | |
641 | ;; The service that produces the RC script. | |
642 | (service hurd-startup-service-type %hurd-rc-script)) | |
a241a7ac | 643 | |
387e1754 LC |
644 | (define special-files-service-type |
645 | ;; Service to install "special files" such as /bin/sh and /usr/bin/env. | |
646 | (service-type | |
647 | (name 'special-files) | |
648 | (extensions | |
649 | (list (service-extension activation-service-type | |
650 | (lambda (files) | |
651 | #~(activate-special-files '#$files))))) | |
652 | (compose concatenate) | |
636bb2b5 LC |
653 | (extend append) |
654 | (description | |
655 | "Add special files to the root file system---e.g., | |
656 | @file{/usr/bin/env}."))) | |
387e1754 LC |
657 | |
658 | (define (extra-special-file file target) | |
659 | "Use TARGET as the \"special file\" FILE. For example, TARGET might be | |
660 | (file-append coreutils \"/bin/env\") | |
661 | and FILE could be \"/usr/bin/env\"." | |
662 | (simple-service (string->symbol (string-append "special-file-" file)) | |
663 | special-files-service-type | |
664 | `((,file ,target)))) | |
665 | ||
0adfe95a LC |
666 | (define (etc-directory service) |
667 | "Return the directory for SERVICE, a service of type ETC-SERVICE-TYPE." | |
efe7d19a | 668 | (files->etc-directory (service-value service))) |
0adfe95a LC |
669 | |
670 | (define (files->etc-directory files) | |
a322e9d1 LC |
671 | (define (assert-no-duplicates files) |
672 | (let loop ((files files) | |
673 | (seen (set))) | |
674 | (match files | |
675 | (() #t) | |
676 | (((file _) rest ...) | |
677 | (when (set-contains? seen file) | |
678 | (raise (condition | |
679 | (&message | |
680 | (message (format #f (G_ "duplicate '~a' entry for /etc") | |
681 | file)))))) | |
682 | (loop rest (set-insert file seen)))))) | |
683 | ||
684 | ;; Detect duplicates early instead of letting them through, eventually | |
685 | ;; leading to a build failure of "etc.drv". | |
686 | (assert-no-duplicates files) | |
687 | ||
0adfe95a LC |
688 | (file-union "etc" files)) |
689 | ||
d62e201c LC |
690 | (define (etc-entry files) |
691 | "Return an entry for the /etc directory consisting of FILES in the system | |
692 | directory." | |
693 | (with-monad %store-monad | |
694 | (return `(("etc" ,(files->etc-directory files)))))) | |
695 | ||
0adfe95a LC |
696 | (define etc-service-type |
697 | (service-type (name 'etc) | |
698 | (extensions | |
699 | (list | |
700 | (service-extension activation-service-type | |
701 | (lambda (files) | |
702 | (let ((etc | |
703 | (files->etc-directory files))) | |
d62e201c LC |
704 | #~(activate-etc #$etc)))) |
705 | (service-extension system-service-type etc-entry))) | |
0adfe95a | 706 | (compose concatenate) |
636bb2b5 LC |
707 | (extend append) |
708 | (description "Populate the @file{/etc} directory."))) | |
0adfe95a LC |
709 | |
710 | (define (etc-service files) | |
711 | "Return a new service of ETC-SERVICE-TYPE that populates /etc with FILES. | |
712 | FILES must be a list of name/file-like object pairs." | |
713 | (service etc-service-type files)) | |
714 | ||
715 | (define setuid-program-service-type | |
716 | (service-type (name 'setuid-program) | |
717 | (extensions | |
718 | (list (service-extension activation-service-type | |
719 | (lambda (programs) | |
720 | #~(activate-setuid-programs | |
721 | (list #$@programs)))))) | |
722 | (compose concatenate) | |
636bb2b5 LC |
723 | (extend append) |
724 | (description | |
725 | "Populate @file{/run/setuid-programs} with the specified | |
726 | executables, making them setuid-root."))) | |
0adfe95a | 727 | |
af4c3fd5 LC |
728 | (define (packages->profile-entry packages) |
729 | "Return a system entry for the profile containing PACKAGES." | |
45bd9133 LC |
730 | (with-monad %store-monad |
731 | (return `(("profile" ,(profile | |
732 | (content (packages->manifest | |
733 | (delete-duplicates packages eq?))))))))) | |
af4c3fd5 LC |
734 | |
735 | (define profile-service-type | |
736 | ;; The service that populates the system's profile---i.e., | |
737 | ;; /run/current-system/profile. It is extended by package lists. | |
738 | (service-type (name 'profile) | |
739 | (extensions | |
740 | (list (service-extension system-service-type | |
741 | packages->profile-entry))) | |
742 | (compose concatenate) | |
636bb2b5 LC |
743 | (extend append) |
744 | (description | |
745 | "This is the @dfn{system profile}, available as | |
746 | @file{/run/current-system/profile}. It contains packages that the sysadmin | |
747 | wants to be globally available to all the system users."))) | |
af4c3fd5 | 748 | |
0adfe95a LC |
749 | (define (firmware->activation-gexp firmware) |
750 | "Return a gexp to make the packages listed in FIRMWARE loadable by the | |
751 | kernel." | |
752 | (let ((directory (directory-union "firmware" firmware))) | |
753 | ;; Tell the kernel where firmware is. | |
754 | #~(activate-firmware (string-append #$directory "/lib/firmware")))) | |
755 | ||
756 | (define firmware-service-type | |
757 | ;; The service that collects firmware. | |
758 | (service-type (name 'firmware) | |
759 | (extensions | |
760 | (list (service-extension activation-service-type | |
761 | firmware->activation-gexp))) | |
762 | (compose concatenate) | |
636bb2b5 LC |
763 | (extend append) |
764 | (description | |
765 | "Make ``firmware'' files loadable by the operating system | |
766 | kernel. Firmware may then be uploaded to some of the machine's devices, such | |
767 | as Wifi cards."))) | |
0adfe95a | 768 | |
e0b47290 LC |
769 | (define (gc-roots->system-entry roots) |
770 | "Return an entry in the system's output containing symlinks to ROOTS." | |
771 | (mlet %store-monad ((entry (gexp->derivation | |
772 | "gc-roots" | |
773 | #~(let ((roots '#$roots)) | |
774 | (mkdir #$output) | |
775 | (chdir #$output) | |
776 | (for-each symlink | |
777 | roots | |
778 | (map number->string | |
779 | (iota (length roots)))))))) | |
780 | (return (if (null? roots) | |
781 | '() | |
782 | `(("gc-roots" ,entry)))))) | |
783 | ||
784 | (define gc-root-service-type | |
785 | ;; A service to associate extra garbage-collector roots to the system. This | |
786 | ;; is a simple hack that guarantees that the system retains references to | |
787 | ;; the given list of roots. Roots must be "lowerable" objects like | |
788 | ;; packages, or derivations. | |
789 | (service-type (name 'gc-roots) | |
790 | (extensions | |
791 | (list (service-extension system-service-type | |
792 | gc-roots->system-entry))) | |
793 | (compose concatenate) | |
636bb2b5 LC |
794 | (extend append) |
795 | (description | |
796 | "Register garbage-collector roots---i.e., store items that | |
dc5729a8 LC |
797 | will not be reclaimed by the garbage collector.") |
798 | (default-value '()))) | |
e0b47290 | 799 | |
0adfe95a LC |
800 | \f |
801 | ;;; | |
802 | ;;; Service folding. | |
803 | ;;; | |
804 | ||
0adfe95a LC |
805 | (define-condition-type &missing-target-service-error &service-error |
806 | missing-target-service-error? | |
807 | (service missing-target-service-error-service) | |
808 | (target-type missing-target-service-error-target-type)) | |
809 | ||
810 | (define-condition-type &ambiguous-target-service-error &service-error | |
811 | ambiguous-target-service-error? | |
812 | (service ambiguous-target-service-error-service) | |
813 | (target-type ambiguous-target-service-error-target-type)) | |
814 | ||
d466b1fc LC |
815 | (define (missing-target-error service target-type) |
816 | (raise | |
817 | (condition (&missing-target-service-error | |
818 | (service service) | |
819 | (target-type target-type)) | |
820 | (&message | |
821 | (message | |
822 | (format #f (G_ "no target of type '~a' for service '~a'") | |
823 | (service-type-name target-type) | |
824 | (service-type-name | |
825 | (service-kind service)))))))) | |
826 | ||
0adfe95a LC |
827 | (define (service-back-edges services) |
828 | "Return a procedure that, when passed a <service>, returns the list of | |
829 | <service> objects that depend on it." | |
830 | (define (add-edges service edges) | |
831 | (define (add-edge extension edges) | |
832 | (let ((target-type (service-extension-target extension))) | |
833 | (match (filter (lambda (service) | |
834 | (eq? (service-kind service) target-type)) | |
835 | services) | |
836 | ((target) | |
837 | (vhash-consq target service edges)) | |
838 | (() | |
d466b1fc | 839 | (missing-target-error service target-type)) |
0adfe95a LC |
840 | (x |
841 | (raise | |
842 | (condition (&ambiguous-target-service-error | |
843 | (service service) | |
844 | (target-type target-type)) | |
845 | (&message | |
846 | (message | |
847 | (format #f | |
69daee23 | 848 | (G_ "more than one target service of type '~a'") |
0adfe95a LC |
849 | (service-type-name target-type)))))))))) |
850 | ||
851 | (fold add-edge edges (service-type-extensions (service-kind service)))) | |
852 | ||
853 | (let ((edges (fold add-edges vlist-null services))) | |
854 | (lambda (node) | |
855 | (reverse (vhash-foldq* cons '() node edges))))) | |
856 | ||
d466b1fc LC |
857 | (define (instantiate-missing-services services) |
858 | "Return SERVICES, a list, augmented with any services targeted by extensions | |
859 | and missing from SERVICES. Only service types with a default value can be | |
860 | instantiated; other missing services lead to a | |
861 | '&missing-target-service-error'." | |
862 | (define (adjust-service-list svc result instances) | |
863 | (fold2 (lambda (extension result instances) | |
864 | (define target-type | |
865 | (service-extension-target extension)) | |
866 | ||
867 | (match (vhash-assq target-type instances) | |
868 | (#f | |
869 | (let ((default (service-type-default-value target-type))) | |
870 | (if (eq? &no-default-value default) | |
871 | (missing-target-error svc target-type) | |
872 | (let ((new (service target-type))) | |
873 | (values (cons new result) | |
874 | (vhash-consq target-type new instances)))))) | |
875 | (_ | |
876 | (values result instances)))) | |
877 | result | |
878 | instances | |
879 | (service-type-extensions (service-kind svc)))) | |
880 | ||
9b6c4355 LC |
881 | (let loop ((services services)) |
882 | (define instances | |
883 | (fold (lambda (service result) | |
884 | (vhash-consq (service-kind service) service | |
885 | result)) | |
886 | vlist-null services)) | |
887 | ||
888 | (define adjusted | |
889 | (fold2 adjust-service-list | |
890 | services instances | |
891 | services)) | |
892 | ||
893 | ;; If we instantiated services, they might in turn depend on missing | |
894 | ;; services. Loop until we've reached fixed point. | |
895 | (if (= (length adjusted) (vlist-length instances)) | |
896 | adjusted | |
897 | (loop adjusted)))) | |
d466b1fc | 898 | |
d62e201c LC |
899 | (define* (fold-services services |
900 | #:key (target-type system-service-type)) | |
0adfe95a LC |
901 | "Fold SERVICES by propagating their extensions down to the root of type |
902 | TARGET-TYPE; return the root service adjusted accordingly." | |
903 | (define dependents | |
904 | (service-back-edges services)) | |
905 | ||
906 | (define (matching-extension target) | |
907 | (let ((target (service-kind target))) | |
908 | (match-lambda | |
909 | (($ <service-extension> type) | |
910 | (eq? type target))))) | |
911 | ||
912 | (define (apply-extension target) | |
913 | (lambda (service) | |
914 | (match (find (matching-extension target) | |
915 | (service-type-extensions (service-kind service))) | |
916 | (($ <service-extension> _ compute) | |
efe7d19a | 917 | (compute (service-value service)))))) |
0adfe95a LC |
918 | |
919 | (match (filter (lambda (service) | |
920 | (eq? (service-kind service) target-type)) | |
921 | services) | |
922 | ((sink) | |
2a4309de LC |
923 | ;; Use the state monad to keep track of already-visited services in the |
924 | ;; graph and to memoize their value once folded. | |
925 | (run-with-state | |
926 | (let loop ((sink sink)) | |
927 | (mlet %state-monad ((visited (current-state))) | |
928 | (match (vhash-assq sink visited) | |
929 | (#f | |
930 | (mlet* %state-monad | |
931 | ((dependents (mapm %state-monad loop (dependents sink))) | |
932 | (visited (current-state)) | |
933 | (extensions -> (map (apply-extension sink) dependents)) | |
934 | (extend -> (service-type-extend (service-kind sink))) | |
935 | (compose -> (service-type-compose (service-kind sink))) | |
936 | (params -> (service-value sink)) | |
937 | (service | |
938 | -> | |
939 | ;; Distinguish COMPOSE and EXTEND because PARAMS typically | |
940 | ;; has a different type than the elements of EXTENSIONS. | |
941 | (if extend | |
942 | (service (service-kind sink) | |
943 | (extend params (compose extensions))) | |
944 | sink))) | |
945 | (mbegin %state-monad | |
946 | (set-current-state (vhash-consq sink service visited)) | |
947 | (return service)))) | |
948 | ((_ . service) ;SINK was already visited | |
949 | (return service))))) | |
950 | vlist-null)) | |
0adfe95a LC |
951 | (() |
952 | (raise | |
953 | (condition (&missing-target-service-error | |
954 | (service #f) | |
955 | (target-type target-type)) | |
956 | (&message | |
69daee23 | 957 | (message (format #f (G_ "service of type '~a' not found") |
0adfe95a LC |
958 | (service-type-name target-type))))))) |
959 | (x | |
960 | (raise | |
961 | (condition (&ambiguous-target-service-error | |
962 | (service #f) | |
963 | (target-type target-type)) | |
964 | (&message | |
965 | (message | |
966 | (format #f | |
69daee23 | 967 | (G_ "more than one target service of type '~a'") |
0adfe95a | 968 | (service-type-name target-type))))))))) |
db4fdc04 LC |
969 | |
970 | ;;; services.scm ends here. |