summaryrefslogtreecommitdiffstats
path: root/src/installer/OpenSLX/OSSetup/Distro/Base.pm
blob: f3f35b6260137c517e2a9d02763b553322e10c35 (plain) (blame)
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
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
# Copyright (c) 2006..2010 - OpenSLX GmbH
#
# This program is free software distributed under the GPL version 2.
# See http://openslx.org/COPYING
#
# If you have any feedback please consult http://openslx.org/feedback and
# send your suggestions, praise, or complaints to feedback@openslx.org
#
# General information about OpenSLX can be found at http://openslx.org/
# -----------------------------------------------------------------------------
# OSSetup/Distro/Base.pm
#    - provides base implementation of the OSSetup Distro API.
# -----------------------------------------------------------------------------
package OpenSLX::OSSetup::Distro::Base;

use strict;
use warnings;

our $VERSION = 1.01;        # API-version . implementation-version

use Fcntl qw(:DEFAULT :flock);
use File::Basename;
use File::Path;
use Scalar::Util qw( weaken );

use OpenSLX::Basics;
use OpenSLX::Utils;

################################################################################
### interface methods
################################################################################
sub new
{
    confess "Creating OpenSLX::OSSetup::System::Base-objects directly makes no sense!";
}

sub initialize
{
    my $self = shift;
    my $engine = shift;

    $self->{'engine'} = $engine;
    weaken($self->{'engine'});
        # avoid circular reference between distro and its engine

    if ($engine->{'distro-name'} =~ m[x86_64]) {
        # be careful to only try installing 64-bit systems if actually
        # running on a 64-bit host, as otherwise we are going to fail later,
        # anyway:
        my $arch = `uname -m`;
        if ($?) {
            die _tr("unable to determine architecture of host system (%s)\n", $!);
        }
        if ($arch !~ m[x86_64]) {
            die _tr("you can't install a 64-bit system on a 32-bit host, sorry!\n");
        }
    }

    $self->{'stage1a-binaries'} = {
        "$openslxConfig{'base-path'}/share/busybox/busybox" => 'bin',
    };

    $self->{'stage1b-faked-files'} = [
        '/etc/mtab',
    ];

    $self->{'stage1c-faked-files'} = [
    ];

    $self->{'clone-filter'} = "
        + /var
        - /var/tmp/*
        - /var/spool/*
        - /var/cache/apt/archives/*.deb
        - /var/cache/apt/archives/lock
        - /var/cache/apt/archives/partial/*
        + /var/cache/apt/archives/partial
        - /var/tmp/* 
        + /var/tmp/apt
        - /var/opt/openslx
        - /var/lib/vmware
        - /var/lib/ntp/*
	- /var/lib/xkb/*
	- /var/run/*
        + /var/run/screen
        - /var/log/*
        + /var/log/apt
        - /usr/lib/vmware/modules/*
        + /usr
        - /tmp/*
        + /tmp
        - /sys/*
        + /sys
        + /sbin
        - /root/*
        + /root
        - /proc/*
        + /proc
        - /opt/openslx
        + /opt
        - /media/*
        + /media
        - /mnt/*
        + /mnt
        + /lib64
        - /lib/ld-uClibc*
        + /lib
        - /home/*
        + /home
        - /etc/vmware/*
        + /etc/vmware
        - /etc/vmware-installer
        - /etc/grub*
        - /etc/shadow*
        - /etc/samba/secrets.tdb
        - /etc/resolv.conf.*
        - /etc/opt/openslx
        + /etc/opt/openslx
        - /etc/exports*
        - /etc/X11/xorg.*
        - /etc/X11/XF86*
        + /etc
        - /dev/*
        + /dev
        + /boot
        + /bin
        - /*
        - .svn
        - .git
        - .*.cmd
        - *~
        - *lost+found*
        - *.old
        - *.bak
        - *.gvfs
    ";

    return;
}

sub fixPrerequiredFiles
{
}

sub startSession
{
    my $self  = shift;
    my $osDir = shift;
    
    # setup a fixed locale environment to avoid warnings about unset locales
    # (like for instance shown by apt-get)
    $ENV{LC_ALL} = 'POSIX';

    # ensure that a couple of important devices exist
    my %devInfo = (
        mem     => { type => 'c', major => '1', minor =>  '1' },
        null    => { type => 'c', major => '1', minor =>  '3' },
        zero    => { type => 'c', major => '1', minor =>  '5' },
        random  => { type => 'c', major => '1', minor =>  '8' },
        urandom => { type => 'c', major => '1', minor =>  '9' },
        kmsg    => { type => 'c', major => '1', minor => '11' },
        tty     => { type => 'c', major => '5', minor =>  '0' },
        console => { type => 'c', major => '5', minor =>  '1' },
        ptmx    => { type => 'c', major => '5', minor =>  '2' },
    );
    if (!-e "$osDir/dev" && !mkpath("$osDir/dev")) {
        die _tr("unable to create folder '%s' (%s)\n", "$osDir/dev", $!);
    }
    foreach my $dev (keys %devInfo) {
        my $info = $devInfo{$dev};
        if (!-e "$osDir//dev/$dev") {
            if (slxsystem(
                "mknod $osDir//dev/$dev $info->{type} $info->{major} $info->{minor}"
            )) {
                croak(_tr("unable to create dev-node '%s'! (%s)", $dev, $!));
            }
        }
    }

    # enter chroot jail
    chrootInto($osDir);
    $ENV{PATH} = join(':', @{$self->getDefaultPathList()});

    # mount /proc (if we have 'mount' available)
    if (qx{which mount 2>/dev/null}) {
        if (!-e '/proc' && !mkpath('/proc')) {
            die _tr("unable to create folder '%s' (%s)\n", "$osDir/proc", $!);
        }
        if (slxsystem("mount -t proc proc '/proc'")) {
            warn _tr("unable to mount '%s' (%s)\n", "$osDir/proc", $!);
        }
        if (!-e '/dev/pts' && !mkpath('/dev/pts')) {
            die _tr("unable to create folder '%s' (%s)\n", "$osDir/dev/pts", $!);
        }
        if (slxsystem("mount -t devpts devpts '/dev/pts'")) {
            warn _tr("unable to mount '%s' (%s)\n", "$osDir/dev/pts", $!);
        }
    }

    return 1;
}

sub finishSession
{
    my $self = shift;
    
    # umount /proc, /dev/pts (if we have 'umount' available)
    if (qx{which umount 2>/dev/null}) {
        if (slxsystem("umount /dev/pts")) {
            warn _tr("unable to umount '%s' (%s)\n", "/dev/pts", $!);
        }
        if (slxsystem("umount /proc")) {
            warn _tr("unable to umount '%s' (%s)\n", "/proc", $!);
        }
    }

    return 1;
}

sub getDefaultPathList
{
    my $self = shift;
    
    return [ qw(
        /sbin
        /usr/sbin
        /usr/local/sbin
        /usr/local/bin
        /usr/bin
        /bin
        /usr/bin/X11
        /usr/X11R6/bin
        /opt/kde3/bin
        /opt/gnome/bin
    ) ];
}

sub updateDistroConfig
{
    if (slxsystem("ldconfig")) {
        die _tr("unable to run ldconfig (%s)", $!);
    }
}

sub pickKernelFile
{
    my $self       = shift;
    my $kernelPath = shift;

    my $newestKernelFile;
    my $newestKernelFileSortKey = '';
    my $kernelPattern = '{vmlinuz,kernel-genkernel-x86}-*';
    foreach my $kernelFile (glob("$kernelPath/$kernelPattern")) {
        next unless $kernelFile =~ m{
            (?:vmlinuz|x86)-(\d+)\.(\d+)\.(\d+)(?:\.(\d+))?-(\d+(?:\.\d+)?)
        }x;
        my $sortKey 
            = sprintf("%02d.%02d.%02d.%02d-%2.1f", $1, $2, $3, $4||0, $5);
        if ($newestKernelFileSortKey lt $sortKey) {
            $newestKernelFile        = $kernelFile;
            $newestKernelFileSortKey = $sortKey;
        }
    }

    if (!defined $newestKernelFile) {
        die _tr("unable to pick a kernel-file from path '%s'!", $kernelPath);
    }
    return $newestKernelFile;
}

sub preSystemInstallationHook
{
}

sub postSystemInstallationHook
{
}

sub setPasswordForUser
{
    my $self = shift;
    my $username = shift;
    my $password = shift;
    
    my $hashedPassword = $self->hashPassword($password);

    my $writePasswordFunction = sub {
        # now read, change and write shadow-file in atomic manner:
        my $shadowFile = '/etc/shadow';
        if (!-e $shadowFile) {
            spitFile( $shadowFile, '');
        }
        slxsystem("cp -r $shadowFile $shadowFile~");
        my $shadowFH;
        open($shadowFH, '+<', $shadowFile)
            or croak _tr("could not open file '%s'! (%s)", $shadowFile, $!);
        flock($shadowFH, LOCK_EX)
            or croak _tr("could not lock file '%s'! (%s)", $shadowFile, $!);
        my $lastChanged = int(time()/24/60/60);
        my $newEntry 
            = "$username:$hashedPassword:$lastChanged:0:99999:7:::";
        my $content = do { local $/; <$shadowFH> };
        if ($content =~ m{^$username:}ims) {
            $content =~ s{^$username:.+?$}{$newEntry}ms;
        } else {
            $content .= "$newEntry\n";
        }
        seek($shadowFH, 0, 0)
            or croak _tr("could not seek file '%s'! (%s)", $shadowFile, $!);
        print $shadowFH $content
            or croak _tr("could not write to file '%s'! (%s)", $shadowFile, $!);
        close($shadowFH)
            or croak _tr("could not close file '%s'! (%s)", $shadowFile, $!);
        unlink "$shadowFile~";
    };
    $self->{engine}->callChrootedFunctionForVendorOS($writePasswordFunction);
}

sub hashPassword
{
    my $self = shift;
    my $password = shift;
    
    my $busyboxBin = $self->{engine}->busyboxBinary();
    my $hashedPassword = qx{$busyboxBin cryptpw -a md5 $password};
    chomp $hashedPassword;

    return $hashedPassword;
}

1;
################################################################################

=pod

=head1 NAME

OpenSLX::OSSetup::System::Base - the base class for all OSSetup backends

=head1 SYNOPSIS

  package OpenSLX::OSSetup::coolnewOS;

  use vars qw(@ISA $VERSION);
  @ISA = ('OpenSLX::OSSetup::Base');
  $VERSION = 1.01;

  use coolnewOS;

  sub new
  {
      my $class = shift;
      my $self = {};
      return bless $self, $class;
  }

  # override all methods of OpenSLX::OSSetup::Base in order to implement
  # a full OS-setup backend
  ...

I<The synopsis above outlines a class that implements a
OSSetup backend for the (imaginary) operating system B<coolnewOS>>

=head1 DESCRIPTION

This class defines the OSSetup interface for the OpenSLX.

Aim of the OSSetup abstraction is to make it possible to install a large set
of different operating systems transparently.

...

=cut