summaryrefslogtreecommitdiffstats
path: root/urpm/removable.pm
blob: 4622102191b47c2a15c5ea02077a42c20df93241 (plain)
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
package urpm::removable;

# $Id$

use urpm::msg;
use urpm::sys;
use urpm::util;
use urpm::get_pkgs;
use urpm 'file_from_local_url';



#- returns the removable device name if it corresponds to an iso image, '' otherwise
#-
#- side-effects: none
sub is_iso {
    my ($removable_dev) = @_;
    $removable_dev && $removable_dev =~ /\.iso$/i;
}

#- side-effects: $urpm->{removable_mounted}, "mount"
sub try_mounting {
    my ($urpm, $dir, $o_removable) = @_;

    my $is_iso = is_iso($o_removable);
    my $mntpoint = $is_iso
	#- note: for isos, we don't parse the fstab because it might not be declared in it.
	#- so we try to remove suffixes from the dir name until the dir exists
	? ($dir = urpm::sys::trim_until_d($dir))
	: _non_mounted_mntpoint($dir);

    if ($mntpoint) {
	$urpm->{log}(N("mounting %s", $mntpoint));
	if ($is_iso) {
	    #- to mount an iso image, grab the first loop device
	    my $loopdev = urpm::sys::first_free_loopdev();
	    sys_log("mount iso $mntpoint on $o_removable");
	    $loopdev and system('mount', $o_removable, $mntpoint, '-t', 'iso9660', '-o', "loop=$loopdev");
	    $o_removable and $urpm->{removable_mounted}{$mntpoint} = undef;
	} else {
	    sys_log("mount $mntpoint");
	    system("mount '$mntpoint' 2>/dev/null");
	}
    }
    -e $dir;
}

#- side-effects: $urpm->{removable_mounted}, "umount"
sub try_umounting {
    my ($urpm, $dir) = @_;

    if (my $mntpoint = _mounted_mntpoint($dir)) {
	$urpm->{log}(N("unmounting %s", $mntpoint));
	sys_log("umount $mntpoint");
	system("umount '$mntpoint' 2>/dev/null");
	delete $urpm->{removable_mounted}{$mntpoint};
    }
    ! -e $dir;
}

#- side-effects: none
sub _mounted_mntpoint {
    my ($dir) = @_;
    $dir = reduce_pathname($dir);
    my $entry = urpm::sys::find_a_mntpoint($dir);
    $entry->{mounted} && $entry->{mntpoint};
}
#- side-effects: none
sub _non_mounted_mntpoint {
    my ($dir) = @_;
    $dir = reduce_pathname($dir);
    my $entry = urpm::sys::find_a_mntpoint($dir);
    !$entry->{mounted} && $entry->{mntpoint};
}

#- side-effects: $urpm->{removable_mounted}
#-   + those of try_umounting ($urpm->{removable_mounted}, umount)
sub try_umounting_removables {
    my ($urpm) = @_;
    foreach (keys %{$urpm->{removable_mounted}}) {
	try_umounting($urpm, $_);
    }
    delete $urpm->{removable_mounted};
}

#- side-effects:
#-   + those of try_mounting ($urpm->{removable_mounted}, "mount")
sub _mount_and_check_notfound {
    my ($urpm, $medium_list, $dir, $removable) = @_;

    try_mounting($urpm, $dir, $removable);
    -e $dir or return 2;

    _check_notfound($medium_list);
}

#- side-effects: none
sub _check_notfound {
    my ($medium_list) = @_;

    foreach (values %$medium_list) {
	my $dir_ = _filepath($_) or next;
	-r $dir_ or return 1;
    }
    0;
}

#- removable media have to be examined to keep mounted the one that has
#- more packages than others.
#-
#- side-effects:
#-   + those of _examine_removable_medium_ ($urpm->{removable_mounted}, $sources, "mount", "umount", "eject", "copy-move-files")
sub _examine_removable_medium {
    my ($urpm, $blist, $sources, $o_ask_for_medium) = @_;

    my $medium = $blist->{medium};

    if (file_from_local_url($medium->{url})) {
	_examine_removable_medium_($urpm, $medium, $blist->{list}, $sources, $o_ask_for_medium);
    } else {
	#- we have a removable device that is not removable, well...
	$urpm->{error}(N("inconsistent medium \"%s\" marked removable but not really", $medium->{name}));
    }
}

#- side-effects: "eject"
#-   + those of _mount_and_check_notfound ($urpm->{removable_mounted}, "mount")
#-   + those of try_umounting ($urpm->{removable_mounted}, "umount")
sub _mount_it {
    my ($urpm, $medium, $medium_list, $o_ask_for_medium) = @_;

    my $dir = file_from_local_url($medium->{url});

    #- the directory given does not exist and may be accessible
    #- by mounting some other directory. Try to figure it out and mount
    #- everything that might be necessary.
    while (_mount_and_check_notfound($urpm, $medium_list, $dir, $medium->{removable})) {
	if (is_iso($medium->{removable})) {
	    try_umounting($urpm, $dir);
	} else {
	    $o_ask_for_medium 
	      or $urpm->{fatal}(4, N("medium \"%s\" is not available", $medium->{name}));

	    try_umounting($urpm, $dir);
	    system("/usr/bin/eject '$medium->{removable}' 2>/dev/null");

	    $o_ask_for_medium->(remove_internal_name($medium->{name}), $medium->{removable})
	      or $urpm->{fatal}(4, N("medium \"%s\" is not available", $medium->{name}));
	}
    }
}

#- side-effects: none
sub _filepath {
    my ($url) = @_;

    chomp $url;
    my $filepath = file_from_local_url($url) or return;
    $filepath =~ m!/.*/! or return; #- is this really needed??
    $filepath;
}

#- side-effects: "copy-move-files"
sub _do_the_copy {
    my ($urpm, $filepath) = @_;

    -r $filepath or return;

    #- we should assume a possibly buggy removable device...
    #- First, copy in partial cache, and if the package is still good,
    #- transfer it to the rpms cache.
    my $filename = basename($filepath);
    unlink "$urpm->{cachedir}/partial/$filename";
    $urpm->{log}("copying $filepath");
    copy_and_own($filepath, "$urpm->{cachedir}/partial/$filename") or return;
    my $f = urpm::get_pkgs::verify_partial_rpm_and_move($urpm, $urpm->{cachedir}, $filename) or return;
    $f;
}

#- side-effects: $sources
#-   + those of _mount_it ($urpm->{removable_mounted}, "mount", "umount", "eject")
#-   + those of _do_the_copy: "copy-move-files"
sub _examine_removable_medium_ {
    my ($urpm, $medium, $medium_list, $sources, $o_ask_for_medium) = @_;

    _mount_it($urpm, $medium, $medium_list, $o_ask_for_medium);

    my $dir = file_from_local_url($medium->{url});

    if (-e $dir) {
	while (my ($i, $url) = each %$medium_list) {
	    my $filepath = _filepath($url) or next;

	    if (my $rpm = _do_the_copy($urpm, $filepath)) {
		$sources->{$i} = $rpm;
	    } else {
		#- fallback to use other method for retrieving the file later.
		$urpm->{error}(N("unable to read rpm file [%s] from medium \"%s\"", $filepath, $medium->{name}));
	    }
	}
    } else {
	$urpm->{error}(N("medium \"%s\" is not available", $medium->{name}));
    }
}

#- side-effects:
#-   + those of try_mounting ($urpm->{removable_mounted}, "mount")
sub _try_mounting_non_removable {
    my ($urpm, $media) = @_;

    foreach my $medium (grep { !$_->{removable} } @$media) {
	my $dir = file_from_local_url($medium->{url}) or next;

	-e $dir || try_mounting($urpm, $dir) or
	  $urpm->{error}(N("unable to access medium \"%s\"", $medium->{name})), next;
    }
}

#- side-effects: none
sub _get_removables {
    my ($blists) = @_;

    my %removables;

    foreach (@$blists) {
	#- examine non removable device but that may be mounted.
	if (my $device = $_->{medium}{removable}) {
	    next if $device =~ m![^a-zA-Z0-9_./-]!; #- bad path
	    push @{$removables{$device} ||= []}, $_;
	}
    }
    values %removables;
}

#- side-effects: none
sub _create_blists {
    my ($media, $list) = @_;

    #- make sure everything is correct on input...
    $media or return;
    @$media == @$list or return;

    my $i;
    [ grep { %{$_->{list}} } 
	map { { medium => $_, list => $list->[$i++] } } @$media ];
}

#- side-effects: none
sub _sort_media {
    my ($urpm, @l) = @_;

    if (@l > 1) {
	@l = sort { values(%{$a->{list}}) <=> values(%{$b->{list}}) } @l;

	#- check if a removable device is already mounted (and files present).
	if (my ($already_mounted) = grep { !_check_notfound($_->{list}) } @l) {
	    @l = ($already_mounted, grep { $_ != $already_mounted } @l);
	}
    }
    @l;
}

#- $list is a [ { pkg_id1 => url1, ... }, { ... }, ... ]
#- where there is one hash for each medium in {media}
#-
#- side-effects:
#-   + those of _try_mounting_non_removable ($urpm->{removable_mounted}, "mount")
#-   + those of _examine_removable_medium ($urpm->{removable_mounted}, $sources, "mount", "umount", "eject", "copy-move-files")
sub copy_packages_of_removable_media {
    my ($urpm, $list, $sources, $o_ask_for_medium) = @_;

    my $blists = _create_blists($urpm->{media}, $list);

    _try_mounting_non_removable($urpm, $urpm->{media});

    foreach my $l (_get_removables($blists)) {

	#- Here we have only removable devices.
	#- If more than one media uses this device, we have to sort
	#- needed packages to copy the needed rpm files.
	foreach my $blist (_sort_media($urpm, @$l)) {
	    _examine_removable_medium($urpm, $blist, $sources, $o_ask_for_medium);
	}
    }

    1;
}

1;