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
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
|
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 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 system install)
#:use-module (gnu)
#:use-module (guix gexp)
#:use-module (guix monads)
#:use-module ((guix store) #:select (%store-prefix))
#:use-module (gnu packages linux)
#:use-module (gnu packages package-management)
#:use-module (gnu packages disk)
#:use-module (gnu packages texinfo)
#:export (installation-os))
;;; Commentary:
;;;
;;; This module provides an 'operating-system' definition for use on images
;;; for USB sticks etc., for the installation of the GNU system.
;;;
;;; Code:
(define (log-to-info)
"Return a script that spawns the Info reader on the right section of the
manual."
(gexp->script "log-to-info"
#~(execl (string-append #$texinfo-4 "/bin/info") "info"
"-d" "/run/current-system/profile/share/info"
"-f" (string-append #$guix "/share/info/guix.info")
"-n" "System Installation")))
(define %backing-directory
;; Sub-directory used as the backing store for copy-on-write.
"/tmp/guix-inst")
(define (make-cow-store target)
"Return a gexp that makes the store copy-on-write, using TARGET as the
backing store. This is useful when TARGET is on a hard disk, whereas the
current store is on a RAM disk."
(define (unionfs read-only read-write mount-point)
;; Make MOUNT-POINT the union of READ-ONLY and READ-WRITE.
;; Note: in the command below, READ-WRITE appears before READ-ONLY so that
;; it is considered a "higher-level branch", as per unionfs-fuse(8),
;; thereby allowing files existing on READ-ONLY to be copied over to
;; READ-WRITE.
#~(fork+exec-command
(list (string-append #$unionfs-fuse "/bin/unionfs")
"-o"
"cow,allow_other,use_ino,max_files=65536,nonempty"
(string-append #$read-write "=RW:" #$read-only "=RO")
#$mount-point)))
(define (set-store-permissions directory)
;; Set the right perms on DIRECTORY to use it as the store.
#~(begin
(chown #$directory 0 30000) ;use the fixed 'guixbuild' GID
(chmod #$directory #o1775)))
#~(begin
(unless (file-exists? "/.ro-store")
(mkdir "/.ro-store")
(mount #$(%store-prefix) "/.ro-store" "none"
(logior MS_BIND MS_RDONLY)))
(let ((rw-dir (string-append target #$%backing-directory)))
(mkdir-p rw-dir)
(mkdir-p "/.rw-store")
#$(set-store-permissions #~rw-dir)
#$(set-store-permissions "/.rw-store")
;; Mount the union, then atomically make it the store.
(and #$(unionfs "/.ro-store" #~rw-dir "/.rw-store")
(begin
(sleep 1) ;XXX: wait for unionfs to be ready
(mount "/.rw-store" #$(%store-prefix) "" MS_MOVE)
(rmdir "/.rw-store"))))))
(define (cow-store-service)
"Return a service that makes the store copy-on-write, such that writes go to
the user's target storage device rather than on the RAM disk."
;; See <http://bugs.gnu.org/18061> for the initial report.
(with-monad %store-monad
(return (service
(requirement '(root-file-system user-processes))
(provision '(cow-store))
(documentation
"Make the store copy-on-write, with writes going to \
the given target.")
(start #~(case-lambda
((target)
#$(make-cow-store #~target)
target)
(else
;; Do nothing, and mark the service as stopped.
#f)))
(stop #~(lambda (target)
;; Delete the temporary directory, but leave everything
;; mounted as there may still be processes using it
;; since 'user-processes' doesn't depend on us.
(delete-file-recursively
(string-append target #$%backing-directory))))))))
(define (installation-services)
"Return the list services for the installation image."
(let ((motd (text-file "motd" "
Welcome to the installation of the GNU operating system!
There is NO WARRANTY, to the extent permitted by law. In particular, you may
LOSE ALL YOUR DATA as a side effect of the installation process. Furthermore,
it is alpha software, so it may BREAK IN UNEXPECTED WAYS.
You have been warned. Thanks for being so brave.
")))
(define (normal-tty tty)
(mingetty-service tty
#:motd motd
#:auto-login "root"
#:login-pause? #t))
(list (mingetty-service "tty1"
#:motd motd
#:auto-login "root")
;; Documentation. The manual is in UTF-8, but
;; 'console-font-service' sets up Unicode support and loads a font
;; with all the useful glyphs like em dash and quotation marks.
(mingetty-service "tty2"
#:motd motd
#:auto-login "guest"
#:login-program (log-to-info))
;; A bunch of 'root' ttys.
(normal-tty "tty3")
(normal-tty "tty4")
(normal-tty "tty5")
(normal-tty "tty6")
;; The usual services.
(syslog-service)
;; The build daemon. Register the hydra.gnu.org key as trusted.
;; This allows the installation process to use substitutes by
;; default.
(guix-service #:authorize-hydra-key? #t)
;; Start udev so that useful device nodes are available.
(udev-service)
;; Add the 'cow-store' service, which users have to start manually
;; since it takes the installation directory as an argument.
(cow-store-service)
;; Install Unicode support and a suitable font.
(console-font-service "tty1")
(console-font-service "tty2")
(console-font-service "tty3")
(console-font-service "tty4")
(console-font-service "tty5")
(console-font-service "tty6")
(nscd-service))))
(define %issue
;; Greeting.
"
This is an installation image of the GNU system. Welcome.
Use Alt-F2 for documentation.
")
(define installation-os
;; The operating system used on installation images for USB sticks etc.
(operating-system
(host-name "gnu")
(timezone "Europe/Paris")
(locale "en_US.UTF-8")
(bootloader (grub-configuration
(device "/dev/sda")))
(file-systems
;; Note: the disk image build code overrides this root file system with
;; the appropriate one.
(cons (file-system
(mount-point "/")
(device "gnu-disk-image")
(type "ext4"))
%base-file-systems))
(users (list (user-account
(name "guest")
(group "users")
(supplementary-groups '("wheel")) ; allow use of sudo
(password "")
(comment "Guest of GNU")
(home-directory "/home/guest"))))
(issue %issue)
(services (installation-services))
;; We don't need setuid programs so pass the empty list so we don't pull
;; additional programs here.
(setuid-programs '())
(pam-services
;; Explicitly allow for empty passwords.
(base-pam-services #:allow-empty-passwords? #t))
(packages (cons* texinfo-4 ; for the standalone Info reader
parted ddrescue
wireless-tools
;; XXX: We used to have GNU fdisk here, but as of version
;; 2.0.0a, that pulls Guile 1.8, which takes unreasonable
;; space; furthermore util-linux's fdisk is already
;; available here, so we keep that.
%base-packages))))
;; Return it here so 'guix system' can consume it directly.
installation-os
;;; install.scm ends here
|
