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
|
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2013, 2014 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 base)
#:use-module (gnu services)
#:use-module (gnu system shadow) ; 'user-account', etc.
#:use-module (gnu system linux) ; 'pam-service', etc.
#:use-module (gnu packages admin)
#:use-module ((gnu packages base)
#:select (glibc-final))
#:use-module (gnu packages package-management)
#:use-module (guix monads)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-26)
#:use-module (ice-9 format)
#:export (host-name-service
mingetty-service
nscd-service
syslog-service
guix-service
%base-services))
;;; Commentary:
;;;
;;; Base system services---i.e., services that 99% of the users will want to
;;; use.
;;;
;;; Code:
(define (host-name-service name)
"Return a service that sets the host name to NAME."
(with-monad %store-monad
(return (service
(documentation "Initialize the machine's host name.")
(provision '(host-name))
(start `(lambda _
(sethostname ,name)))
(respawn? #f)))))
(define* (mingetty-service tty
#:key
(motd (text-file "motd" "Welcome.\n"))
(allow-empty-passwords? #t))
"Return a service to run mingetty on TTY."
(mlet %store-monad ((mingetty-bin (package-file mingetty "sbin/mingetty"))
(motd motd))
(return
(service
(documentation (string-append "Run mingetty on " tty "."))
(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))
(stop `(make-kill-destructor))
(inputs `(("mingetty" ,mingetty)
("motd" ,motd)))
(pam-services
;; Let 'login' be known to PAM. All the mingetty services will have
;; that PAM service, but that's fine because they're all identical and
;; duplicates are removed.
(list (unix-pam-service "login"
#:allow-empty-passwords? allow-empty-passwords?
#:motd motd)))))))
(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
(documentation "Run libc's name service cache daemon (nscd).")
(provision '(nscd))
(start `(make-forkexec-constructor ,nscd "-f" "/dev/null"
"--foreground"))
(stop `(make-kill-destructor))
(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
(documentation "Run the syslog daemon (syslogd).")
(provision '(syslogd))
(start `(make-forkexec-constructor ,syslogd "--no-detach"
"--rcfile" ,syslog.conf))
(stop `(make-kill-destructor))
(inputs `(("inetutils" ,inetutils)
("syslog.conf" ,syslog.conf)))))))
(define* (guix-build-accounts count #:key
(first-uid 30001)
(gid 30000)
(shadow shadow))
"Return a list of COUNT user accounts for Guix build users, with UIDs
starting at FIRST-UID, and under GID."
(with-monad %store-monad
(return (unfold (cut > <> count)
(lambda (n)
(user-account
(name (format #f "guixbuilder~2,'0d" n))
(password "!")
(uid (+ first-uid n -1))
(gid gid)
(comment (format #f "Guix Build User ~2d" n))
(home-directory "/var/empty")
(shell (package-file shadow "sbin/nologin"))
(inputs `(("shadow" ,shadow)))))
1+
1))))
(define* (guix-service #:key (guix guix) (builder-group "guixbuild")
(build-user-gid 30000) (build-accounts 10))
"Return a service that runs the build daemon from GUIX, and has
BUILD-ACCOUNTS user accounts available under BUILD-USER-GID."
(mlet %store-monad ((daemon (package-file guix "bin/guix-daemon"))
(accounts (guix-build-accounts build-accounts
#:gid build-user-gid)))
(return (service
(provision '(guix-daemon))
(start `(make-forkexec-constructor ,daemon
"--build-users-group"
,builder-group))
(stop `(make-kill-destructor))
(inputs `(("guix" ,guix)))
(user-accounts accounts)
(user-groups (list (user-group
(name builder-group)
(id build-user-gid)
(members (map user-account-name
user-accounts)))))))))
(define %base-services
;; Convenience variable holding the basic services.
(let ((motd (text-file "motd" "
This is the GNU operating system, welcome!\n\n")))
(list (mingetty-service "tty1" #:motd motd)
(mingetty-service "tty2" #:motd motd)
(mingetty-service "tty3" #:motd motd)
(mingetty-service "tty4" #:motd motd)
(mingetty-service "tty5" #:motd motd)
(mingetty-service "tty6" #:motd motd)
(syslog-service)
(guix-service)
(nscd-service)
;; FIXME: Make this an activation-time thing instead of a service.
(host-name-service "gnu"))))
;;; base.scm ends here
|
