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
|
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2013 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 system dmd)
#:use-module (guix store)
#:use-module (guix packages)
#:use-module (guix derivations)
#:use-module (guix records)
#:use-module ((gnu packages base)
#:select (glibc-final))
#:use-module ((gnu packages system)
#:select (mingetty inetutils))
#:use-module ((gnu packages package-management)
#:select (guix))
#:use-module ((gnu packages linux)
#:select (net-tools))
#:use-module (ice-9 match)
#:use-module (srfi srfi-1)
#:use-module (guix monads)
#:export (service?
service
service-provision
service-requirement
service-respawn?
service-start
service-stop
service-inputs
host-name-service
syslog-service
mingetty-service
nscd-service
guix-service
static-networking-service
dmd-configuration-file))
;;; Commentary:
;;;
;;; System services as cajoled by dmd.
;;;
;;; Code:
(define-record-type* <service>
service make-service
service?
(provision service-provision) ; list of symbols
(requirement service-requirement ; list of symbols
(default '()))
(respawn? service-respawn? ; Boolean
(default #t))
(start service-start) ; expression
(stop service-stop ; expression
(default #f))
(inputs service-inputs ; list of inputs
(default '())))
(define (host-name-service name)
"Return a service that sets the host name to NAME."
(with-monad %store-monad
(return (service
(provision '(host-name))
(start `(lambda _
(sethostname ,name)))
(respawn? #f)))))
(define (mingetty-service tty)
"Return a service to run mingetty on TTY."
(mlet %store-monad ((mingetty-bin (package-file mingetty "sbin/mingetty")))
(return
(service
(provision (list (symbol-append 'term- (string->symbol tty))))
;; Since the login prompt shows the host name, wait for the 'host-name'
;; service to be done.
(requirement '(host-name))
(start `(make-forkexec-constructor ,mingetty-bin "--noclear" ,tty))
(inputs `(("mingetty" ,mingetty)))))))
(define* (nscd-service #:key (glibc glibc-final))
"Return a service that runs libc's name service cache daemon (nscd)."
(mlet %store-monad ((nscd (package-file glibc "sbin/nscd")))
(return (service
(provision '(nscd))
(start `(make-forkexec-constructor ,nscd "-f" "/dev/null"))
;; XXX: Local copy of 'make-kill-destructor' because the one upstream
;; uses the broken 'opt-lambda' macro.
(stop `(lambda* (#:optional (signal SIGTERM))
(lambda (pid . args)
(kill pid signal)
#f)))
(respawn? #f)
(inputs `(("glibc" ,glibc)))))))
(define (syslog-service)
"Return a service that runs 'syslogd' with reasonable default settings."
;; Snippet adapted from the GNU inetutils manual.
(define contents "
# Log all kernel messages, authentication messages of
# level notice or higher and anything of level err or
# higher to the console.
# Don't log private authentication messages!
*.err;kern.*;auth.notice;authpriv.none /dev/console
# Log anything (except mail) of level info or higher.
# Don't log private authentication messages!
*.info;mail.none;authpriv.none /var/log/messages
# Same, in a different place.
*.info;mail.none;authpriv.none /dev/tty12
# The authpriv file has restricted access.
authpriv.* /var/log/secure
# Log all the mail messages in one place.
mail.* /var/log/maillog
")
(mlet %store-monad
((syslog.conf (text-file "syslog.conf" contents))
(syslogd (package-file inetutils "libexec/syslogd")))
(return
(service
(provision '(syslogd))
(start `(make-forkexec-constructor ,syslogd
"--rcfile" ,syslog.conf))
(inputs `(("inetutils" ,inetutils)
("syslog.conf" ,syslog.conf)))))))
(define* (guix-service #:key (guix guix) (builder-group "guixbuild"))
"Return a service that runs the build daemon from GUIX."
(mlet %store-monad ((daemon (package-file guix "bin/guix-daemon")))
(return (service
(provision '(guix-daemon))
(start `(make-forkexec-constructor ,daemon
"--build-users-group"
,builder-group))
(inputs `(("guix" ,guix)))))))
(define* (static-networking-service interface ip
#:key
gateway
(inetutils inetutils)
(net-tools net-tools))
"Return a service that starts INTERFACE with address IP. If GATEWAY is
true, it must be a string specifying the default network gateway."
;; TODO: Eventually we should do this using Guile's networking procedures,
;; like 'configure-qemu-networking' does, but the patch that does this is
;; not yet in stock Guile.
(mlet %store-monad ((ifconfig (package-file inetutils "bin/ifconfig"))
(route (package-file net-tools "sbin/route")))
(return
(service
(provision '(networking))
(start `(lambda _
(and (zero? (system* ,ifconfig ,interface ,ip "up"))
,(if gateway
`(begin
(sleep 3) ; XXX
(zero? (system* ,route "add" "-net" "default"
"gw" ,gateway)))
#t))))
(stop `(lambda _
(system* ,ifconfig ,interface "down")
(system* ,route "del" "-net" "default")))
(respawn? #f)
(inputs `(("inetutils" ,inetutils)
,@(if gateway
`(("net-tools" ,net-tools))
'())))))))
(define (dmd-configuration-file services)
"Return the dmd configuration file for SERVICES."
(define config
`(begin
(register-services
,@(map (match-lambda
(($ <service> provision requirement respawn? start stop)
`(make <service>
#:provides ',provision
#:requires ',requirement
#:respawn? ,respawn?
#:start ,start
#:stop ,stop)))
services))
(for-each start ',(append-map service-provision services))))
(text-file "dmd.conf" (object->string config)))
;;; dmd.scm ends here
|