1 files changed, 115 insertions, 0 deletions
diff --git a/perl-install/fs/wild_device.pm b/perl-install/fs/wild_device.pm
new file mode 100644
index 000000000..f2383b6db
--- /dev/null
+++ b/perl-install/fs/wild_device.pm
@@ -0,0 +1,115 @@
+package fs::wild_device; # $Id: wild_device.pm 250502 2008-12-16 10:25:09Z pixel $
+
+use diagnostics;
+use strict;
+
+use common;
+
+
+sub analyze {
+    my ($dev) = @_;
+
+    if ($dev =~ m!^/u?dev/(.*)!) {
+	'dev', $dev;
+    } elsif ($dev !~ m!^/! && (-e "/dev/$dev" || -e "$::prefix/dev/$dev")) {
+	'dev', "/dev/$dev";
+    } elsif ($dev =~ /^LABEL=(.*)/) {
+	'label', $1;
+    } elsif ($dev =~ /^UUID=(.*)/) {
+	'uuid', $1;
+    } elsif ($dev eq 'none' || $dev eq 'rootfs') {
+	'virtual';
+    } elsif ($dev =~ m!^(\S+):/(\w|$)!) {
+	'nfs';
+    } elsif ($dev =~ m!^//\w!) {
+	'smb';
+    } elsif ($dev =~ m!^https?://!) {
+	'dav';
+    }
+}
+
+sub to_subpart {
+    my ($dev) = @_;
+
+    my $part = { device => $dev, faked_device => 1 }; #- default
+
+    if (my ($kind, $val) = analyze($dev)) {
+	if ($kind eq 'label') {	    
+	    $part->{device_LABEL} = $val;
+	} elsif ($kind eq 'uuid') {	    
+	    $part->{device_UUID} = $val;
+	} elsif ($kind eq 'dev') {
+	    my %part = (faked_device => 0);
+	    if (my $rdev = (stat "$::prefix$dev")[6]) {
+		($part{major}, $part{minor}) = unmakedev($rdev);
+	    }
+
+	    my $symlink = readlink("$::prefix$dev");
+	    $dev =~ s!/u?dev/!!;
+
+	    if ($symlink && $symlink !~ m!^/!) {
+		my $keep = 1;
+		if ($symlink =~ m!/! || $dev =~ m!/!) {
+		    $symlink = MDK::Common::File::concat_symlink("/dev/" . dirname($dev), $symlink);
+		    $symlink =~ s!^/dev/!! or $keep = 0;
+		}
+		if ($keep) {
+		    $part{device_LABEL} = $1 if $dev =~  m!^disk/by-label/(.*)!;
+		    $part{device_UUID} = $1 if $dev =~  m!^disk/by-uuid/(.*)!;
+		    $part{device_alias} = $dev;
+		    $dev = $symlink;
+		}
+	    }
+	    if (my $part_number = devices::part_number(\%part)) {
+		$part{part_number} = $part_number;
+	    }
+	    $part{device} = $dev;
+	    return \%part;
+	}
+    } else {
+	if ($dev =~ m!^/! && -f "$::prefix$dev") {
+	    #- it must be a loopback file or directory to bind
+	} else {
+	    log::l("part_from_wild_device_name: unknown device $dev");
+	}
+    }
+    $part;
+}
+
+sub _prefer_device_UUID {
+    my ($part) = @_;
+    $part->{prefer_device_UUID} || 
+      !$::no_uuid_by_default && devices::should_prefer_UUID($part->{device});
+}
+
+sub from_part {
+    my ($prefix, $part) = @_;
+
+    if ($part->{prefer_device_LABEL}) {
+	'LABEL=' . $part->{device_LABEL};
+    } elsif ($part->{device_alias}) {
+	"/dev/$part->{device_alias}";
+    } elsif (!$part->{prefer_device} && $part->{device_UUID} && _prefer_device_UUID($part)) {
+	'UUID=' . $part->{device_UUID};
+    } else {
+	my $faked_device = exists $part->{faked_device} ? 
+	    $part->{faked_device} : 
+	    do {
+		#- in case $part has been created without using fs::wild_device::to_subpart()
+		my ($kind) = analyze($part->{device});
+		$kind ? $kind ne 'dev' : $part->{device} =~ m!^/!;
+	    };
+	if ($faked_device) {
+	    $part->{device};
+	} elsif ($part->{device} =~ m!^/dev/!) {
+	    log::l("ERROR: i have a full device $part->{device}, this should not happen. use fs::wild_device::to_subpart() instead of creating bad part data-structures!");
+	    $part->{device};
+	} else {
+	    my $dev = "/dev/$part->{device}";
+	    eval { devices::make("$prefix$dev") };
+	    $dev;
+	}
+    }
+}
+
+1;