create urpm::removable out of urpm.pm

1 files changed, 195 insertions, 0 deletions

diff --git a/urpm/removable.pm b/urpm/removable.pm
new file mode 100644
index 00000000..783a2ba5
--- /dev/null
+++ b/urpm/removable.pm
@@ -0,0 +1,195 @@
+package urpm::removable;
+
+# $Id$
+
+use urpm::msg;
+use urpm::sys;
+use urpm::util;
+use urpm 'file_from_local_url';
+
+
+
+#- returns the removable device name if it corresponds to an iso image, '' otherwise
+sub is_iso {
+    my ($removable_dev) = @_;
+    $removable_dev && $removable_dev =~ /\.iso$/i;
+}
+
+sub try_mounting {
+    my ($urpm, $dir, $o_removable) = @_;
+    my %infos;
+
+    my $is_iso = is_iso($o_removable);
+    my @mntpoints = $is_iso
+	#- note: for isos, we don't parse the fstab because it might not be declared in it.
+	#- so we try to remove suffixes from the dir name until the dir exists
+	? ($dir = urpm::sys::trim_until_d($dir))
+	: urpm::sys::find_mntpoints($dir = reduce_pathname($dir), \%infos);
+    foreach (grep {
+	    ! $infos{$_}{mounted} && $infos{$_}{fs} ne 'supermount';
+	} @mntpoints)
+    {
+	$urpm->{log}(N("mounting %s", $_));
+	if ($is_iso) {
+	    #- to mount an iso image, grab the first loop device
+	    my $loopdev = urpm::sys::first_free_loopdev();
+	    sys_log("mount iso $_ on $o_removable");
+	    $loopdev and system('mount', $o_removable, $_, '-t', 'iso9660', '-o', "loop=$loopdev");
+	} else {
+	    sys_log("mount $_");
+	    system("mount '$_' 2>/dev/null");
+	}
+	$o_removable && $infos{$_}{fs} ne 'supermount' and $urpm->{removable_mounted}{$_} = undef;
+    }
+    -e $dir;
+}
+
+sub try_umounting {
+    my ($urpm, $dir) = @_;
+    my %infos;
+
+    $dir = reduce_pathname($dir);
+    foreach (reverse grep {
+	    $infos{$_}{mounted} && $infos{$_}{fs} ne 'supermount';
+	} urpm::sys::find_mntpoints($dir, \%infos))
+    {
+	$urpm->{log}(N("unmounting %s", $_));
+	sys_log("umount $_");
+	system("umount '$_' 2>/dev/null");
+	delete $urpm->{removable_mounted}{$_};
+    }
+    ! -e $dir;
+}
+
+sub try_umounting_removables {
+    my ($urpm) = @_;
+    foreach (keys %{$urpm->{removable_mounted}}) {
+	try_umounting($urpm, $_);
+    }
+    delete $urpm->{removable_mounted};
+}
+
+#- $list is a [ { pkg_id1 => url1, ... }, { ... }, ... ]
+#- where there is one hash for each medium in {media}
+sub copy_packages_of_removable_media {
+    my ($urpm, $list, $sources, $o_ask_for_medium) = @_;
+    my %removables;
+
+    #- make sure everything is correct on input...
+    $urpm->{media} or return;
+    @{$urpm->{media}} == @$list or return;
+
+    #- examine if given medium is already inside a removable device.
+    my $check_notfound = sub {
+	my ($id, $dir, $removable) = @_;
+	if ($dir) {
+	    try_mounting($urpm, $dir, $removable);
+	    -e $dir or return 2;
+	}
+	foreach (values %{$list->[$id]}) {
+	    chomp;
+	    my $dir_ = file_from_local_url($_) or next;
+	    $dir_ =~ m!/.*/! or next; #- is this really needed??
+	    unless ($dir) {
+		$dir = $dir_;
+		try_mounting($urpm, $dir, $removable);
+	    }
+	    -r $dir_ or return 1;
+	}
+	0;
+    };
+    #- removable media have to be examined to keep mounted the one that has
+    #- more packages than others.
+    my $examine_removable_medium = sub {
+	my ($id, $device) = @_;
+	my $medium = $urpm->{media}[$id];
+	if (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 ($check_notfound->($id, $dir, is_iso($medium->{removable}) ? $medium->{removable} : 'removable')) {
+		is_iso($medium->{removable}) || $o_ask_for_medium
+		    or $urpm->{fatal}(4, N("medium \"%s\" is not selected", $medium->{name}));
+		try_umounting($urpm, $dir);
+		system("/usr/bin/eject '$device' 2>/dev/null");
+		is_iso($medium->{removable})
+		    || $o_ask_for_medium->(remove_internal_name($medium->{name}), $medium->{removable})
+		    or $urpm->{fatal}(4, N("medium \"%s\" is not selected", $medium->{name}));
+	    }
+	    if (-e $dir) {
+		while (my ($i, $url) = each %{$list->[$id]}) {
+		    chomp $url;
+		    my ($filepath, $filename) = do {
+			my $f = file_from_local_url($url) or next;
+			$f =~ m!/.*/! or next; #- is this really needed??
+			dirname($f), basename($f);
+		    };
+		    if (-r $filepath) {
+			#- we should assume a possibly buggy removable device...
+			#- First, copy in partial cache, and if the package is still good,
+			#- transfer it to the rpms cache.
+			unlink "$urpm->{cachedir}/partial/$filename";
+			if (copy_and_own($filepath, "$urpm->{cachedir}/partial/$filename") &&
+			    URPM::verify_rpm("$urpm->{cachedir}/partial/$filename", nosignatures => 1))
+			{
+			    #- now we can consider the file to be fine.
+			    unlink "$urpm->{cachedir}/rpms/$filename";
+			    urpm::util::move("$urpm->{cachedir}/partial/$filename", "$urpm->{cachedir}/rpms/$filename");
+			    -r "$urpm->{cachedir}/rpms/$filename" and $sources->{$i} = "$urpm->{cachedir}/rpms/$filename";
+			}
+		    }
+		    unless ($sources->{$i}) {
+			#- 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 selected", $medium->{name}));
+	    }
+	} else {
+	    #- we have a removable device that is not removable, well...
+	    $urpm->{error}(N("inconsistent medium \"%s\" marked removable but not really", $medium->{name}));
+	}
+    };
+
+    foreach (0..$#$list) {
+	values %{$list->[$_]} or next;
+	my $medium = $urpm->{media}[$_];
+	#- examine non removable device but that may be mounted.
+	if ($medium->{removable}) {
+	    push @{$removables{$medium->{removable}} ||= []}, $_;
+	} elsif (my $dir = file_from_local_url($medium->{url})) {
+	    -e $dir || try_mounting($urpm, $dir) or
+	      $urpm->{error}(N("unable to access medium \"%s\"", $medium->{name})), next;
+	}
+    }
+    foreach my $device (keys %removables) {
+	next if $device =~ m![^a-zA-Z0-9_./-]!; #- bad path
+	#- Here we have only removable devices.
+	#- If more than one media uses this device, we have to sort
+	#- needed packages to copy the needed rpm files.
+	if (@{$removables{$device}} > 1) {
+	    my @sorted_media = sort { values(%{$list->[$a]}) <=> values(%{$list->[$b]}) } @{$removables{$device}};
+
+	    #- check if a removable device is already mounted (and files present).
+	    if (my ($already_mounted_medium) = grep { !$check_notfound->($_) } @sorted_media) {
+		@sorted_media = grep { $_ ne $already_mounted_medium } @sorted_media;
+		unshift @sorted_media, $already_mounted_medium;
+	    }
+
+	    #- mount all except the biggest one.
+	    my $biggest = pop @sorted_media;
+	    foreach (@sorted_media) {
+		$examine_removable_medium->($_, $device);
+	    }
+	    #- now mount the last one...
+	    $removables{$device} = [ $biggest ];
+	}
+
+	$examine_removable_medium->($removables{$device}[0], $device);
+    }
+
+    1;
+}
+
+1;