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
|
;;; 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 build install)
#:use-module (guix build utils)
#:use-module (srfi srfi-26)
#:use-module (ice-9 match)
#:export (install-grub
populate-root-file-system
reset-timestamps
register-closure))
;;; Commentary:
;;;
;;; This module supports the installation of the GNU system on a hard disk.
;;; It is meant to be used both in a build environment (in derivations that
;;; build VM images), and on the bare metal (when really installing the
;;; system.)
;;;
;;; Code:
(define* (install-grub grub.cfg device mount-point)
"Install GRUB with GRUB.CFG on DEVICE, which is assumed to be mounted on
MOUNT-POINT. Note that the caller must make sure that GRUB.CFG is registered
as a GC root."
(let* ((target (string-append mount-point "/boot/grub/grub.cfg"))
(pivot (string-append target ".new")))
(mkdir-p (dirname target))
;; Symlink GRUB.CFG, under the assumption that it has been registered as a
;; GC root somewhere. Do that atomically.
(symlink grub.cfg pivot)
(rename-file pivot target)
(unless (zero? (system* "grub-install" "--no-floppy"
"--boot-directory"
(string-append mount-point "/boot")
device))
(error "failed to install GRUB"))))
(define (evaluate-populate-directive directive target)
"Evaluate DIRECTIVE, an sexp describing a file or directory to create under
directory TARGET."
(let loop ((directive directive))
(catch 'system-error
(lambda ()
(match directive
(('directory name)
(mkdir-p (string-append target name)))
(('directory name uid gid)
(let ((dir (string-append target name)))
(mkdir-p dir)
(chown dir uid gid)))
(('directory name uid gid mode)
(loop `(directory ,name ,uid ,gid))
(chmod (string-append target name) mode))
((new '-> old)
(let try ()
(catch 'system-error
(lambda ()
(symlink old (string-append target new)))
(lambda args
;; When doing 'guix system init' on the current '/', some
;; symlinks may already exists. Override them.
(if (= EEXIST (system-error-errno args))
(begin
(delete-file (string-append target new))
(try))
(apply throw args))))))))
(lambda args
;; Usually we can only get here when installing to an existing root,
;; as with 'guix system init foo.scm /'.
(format (current-error-port)
"error: failed to evaluate directive: ~s~%"
directive)
(apply throw args)))))
(define (directives store)
"Return a list of directives to populate the root file system that will host
STORE."
`(;; Note: the store's GID is fixed precisely so we can set it here rather
;; than at activation time.
(directory ,store 0 30000 #o1775)
(directory "/etc")
(directory "/var/log") ; for dmd
(directory "/var/guix/gcroots")
(directory "/var/empty") ; for no-login accounts
(directory "/var/db") ; for dhclient, etc.
(directory "/var/run")
(directory "/run")
(directory "/mnt")
(directory "/var/guix/profiles/per-user/root" 0 0)
;; Link to the initial system generation.
("/var/guix/profiles/system" -> "system-1-link")
("/var/guix/gcroots/booted-system" -> "/run/booted-system")
("/var/guix/gcroots/current-system" -> "/run/current-system")
(directory "/bin")
(directory "/tmp" 0 0 #o1777) ; sticky bit
(directory "/root" 0 0) ; an exception
(directory "/home" 0 0)))
(define (populate-root-file-system system target)
"Make the essential non-store files and directories on TARGET. This
includes /etc, /var, /run, /bin/sh, etc., and all the symlinks to SYSTEM."
(for-each (cut evaluate-populate-directive <> target)
(directives (%store-directory)))
;; Add system generation 1.
(false-if-exception (delete-file "/var/guix/profiles/system-1-link"))
(symlink system
(string-append target "/var/guix/profiles/system-1-link")))
(define (reset-timestamps directory)
"Reset the timestamps of all the files under DIRECTORY, so that they appear
as created and modified at the Epoch."
(display "clearing file timestamps...\n")
(for-each (lambda (file)
(let ((s (lstat file)))
;; XXX: Guile uses libc's 'utime' function (not 'futime'), so
;; the timestamp of symlinks cannot be changed, and there are
;; symlinks here pointing to /gnu/store, which is the host,
;; read-only store.
(unless (eq? (stat:type s) 'symlink)
(utime file 0 0 0 0))))
(find-files directory "")))
(define (register-closure store closure)
"Register CLOSURE in STORE, where STORE is the directory name of the target
store and CLOSURE is the name of a file containing a reference graph as used
by 'guix-register'. As a side effect, this resets timestamps on store files."
(let ((status (system* "guix-register" "--prefix" store
closure)))
(unless (zero? status)
(error "failed to register store items" closure))))
;;; install.scm ends here
|
