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
|
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2016 Sou Bunnbu <iyzsong@gmail.com>
;;; Copyright © 2016, 2017, 2018, 2020, 2022 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2017 Huang Ying <huang.ying.caritas@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 dict)
#:use-module (guix gexp)
#:use-module (guix records)
#:use-module (guix modules)
#:use-module (guix least-authority)
#:use-module (gnu services)
#:use-module (gnu services shepherd)
#:use-module (gnu system shadow)
#:use-module ((gnu packages admin) #:select (shadow))
#:use-module (gnu packages dico)
#:use-module (gnu packages dictionaries)
#:autoload (gnu build linux-container) (%namespaces)
#:autoload (gnu system file-systems) (file-system-mapping)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-26)
#:use-module (ice-9 match)
#:export (dicod-service
dicod-service-type
dicod-configuration
dicod-handler
dicod-database
%dicod-database:gcide))
;;;
;;; GNU Dico.
;;;
(define-record-type* <dicod-configuration>
dicod-configuration make-dicod-configuration
dicod-configuration?
(dico dicod-configuration-dico (default dico))
(interfaces dicod-configuration-interfaces ;list of strings
(default '("localhost")))
(handlers dicod-configuration-handlers ;list of <dicod-handler>
(default '()))
(databases dicod-configuration-databases ;list of <dicod-database>
(default (list %dicod-database:gcide))))
(define-record-type* <dicod-handler>
dicod-handler make-dicod-handler
dicod-handler?
(name dicod-handler-name)
(module dicod-handler-module (default #f))
(options dicod-handler-options (default '())))
(define-record-type* <dicod-database>
dicod-database make-dicod-database
dicod-database?
(name dicod-database-name)
(handler dicod-database-handler)
(complex? dicod-database-complex? (default #f))
(options dicod-database-options (default '())))
(define %dicod-database:gcide
(dicod-database
(name "gcide")
(handler "gcide")
(options (list #~(string-append "dbdir=" #$gcide "/share/gcide")
"idxdir=/var/run/dicod"))))
(define %dicod-accounts
(list (user-group
(name "dicod")
(system? #t))
(user-account
(name "dicod")
(group "dicod")
(system? #t)
(home-directory "/var/empty")
(shell (file-append shadow "/sbin/nologin")))))
(define (dicod-configuration-file config)
(define handler->text
(match-lambda
(($ <dicod-handler> name #f '())
`("
load-module " ,name ";"))
(($ <dicod-handler> name #f options)
(handler->text (dicod-handler
(name name)
(module name)
(options options))))
(($ <dicod-handler> name module options)
`("
load-module " ,name " {
command \"" ,module (string-join (list ,@options) " " 'prefix) "\";
}\n"))))
(define database->text
(match-lambda
(($ <dicod-database> name handler #f options)
(append
(handler->text (dicod-handler
(name handler)))
(database->text (dicod-database
(name name)
(handler handler)
(complex? #t)
(options options)))))
(($ <dicod-database> name handler complex? options)
`("
database {
name \"" ,name "\";
handler \"" ,handler
(string-join (list ,@options) " " 'prefix) "\";
}\n"))))
(define configuration->text
(match-lambda
(($ <dicod-configuration> dico (interfaces ...) handlers databases)
(append `("listen ("
,(string-join interfaces ", ") ");\n")
(append-map handler->text handlers)
(append-map database->text databases)))))
(apply mixed-text-file "dicod.conf" (configuration->text config)))
(define %dicod-activation
#~(begin
(use-modules (guix build utils))
(let ((user (getpwnam "dicod"))
(rundir "/var/run/dicod"))
(mkdir-p rundir)
(chown rundir (passwd:uid user) (passwd:gid user)))))
(define (dicod-shepherd-service config)
(let* ((dicod.conf (dicod-configuration-file config))
(interfaces (dicod-configuration-interfaces config))
(dicod (least-authority-wrapper
(file-append (dicod-configuration-dico config)
"/bin/dicod")
#:name "dicod"
#:mappings (list (file-system-mapping
(source "/var/run/dicod")
(target source)
(writable? #t))
(file-system-mapping
(source "/dev/log")
(target source))
(file-system-mapping
(source dicod.conf)
(target source)))
#:namespaces (delq 'net %namespaces))))
(list (shepherd-service
(provision '(dicod))
(requirement '(user-processes))
(documentation "Run the dicod daemon.")
(start #~(if (and (defined? 'make-inetd-constructor)
#$(= 1 (length interfaces))) ;XXX
(make-inetd-constructor
(list #$dicod "--inetd" "--foreground"
(string-append "--config=" #$dicod.conf))
(addrinfo:addr
(car (getaddrinfo #$(first interfaces) "dict")))
#:user "dicod" #:group "dicod"
#:service-name-stem "dicod")
(make-forkexec-constructor
(list #$dicod "--foreground"
(string-append "--config=" #$dicod.conf))
#:user "dicod" #:group "dicod")))
(stop #~(if (and (defined? 'make-inetd-destructor)
#$(= 1 (length interfaces))) ;XXX
(make-inetd-destructor)
(make-kill-destructor)))))))
(define dicod-service-type
(service-type
(name 'dict)
(extensions
(list (service-extension account-service-type
(const %dicod-accounts))
(service-extension activation-service-type
(const %dicod-activation))
(service-extension shepherd-root-service-type
dicod-shepherd-service)))
(default-value (dicod-configuration))
(description
"Run @command{dicod}, the dictionary server of
@uref{https://www.gnu.org/software/dico, GNU Dico}. @command{dicod}
implements the standard DICT protocol supported by clients such as
@command{dico} and GNOME Dictionary.")))
(define* (dicod-service #:key (config (dicod-configuration)))
"Return a service that runs the @command{dicod} daemon, an implementation
of DICT server (@pxref{Dicod,,, dico, GNU Dico Manual}).
The optional @var{config} argument specifies the configuration for
@command{dicod}, which should be a @code{<dicod-configuration>} object, by
default it serves the GNU Collaborative International Dictionary of English.
You can add @command{open localhost} to your @file{~/.dico} file to make
@code{localhost} the default server for @command{dico}
client (@pxref{Initialization File,,, dico, GNU Dico Manual})."
(service dicod-service-type config))
|