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+
+#!/bin/bash
+#
+# pacman-uncage
+#
+# Copyright (c) 2002-2006 by Andrew Rose <rose.andrew@gmail.com>
+# I used Judds pacman-optimise as a framework.
+#
+# This program 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 2 of the License, or
+# (at your option) any later version.
+#
+# This program 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 this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+# USA.
+#
+
+myver='2.9.8'
+dbroot="/var/lib/pacman"
+tmproot="/var/lib/pacman.new"
+pacmandb="/var/lib/pacman.db"
+
+usage() {
+ echo "pacman-uncage $myver"
+ echo "usage: $0 [pacman_db_root]"
+ echo
+ echo "pacman-uncage returns your pacman db to the generic style."
+ echo
+}
+
+die() {
+ echo "pacman-uncage: $*" >&2
+ exit 1
+}
+
+die_r() {
+ rm -f /tmp/pacman.lck
+ die $*
+}
+
+if [ "$1" != "" ]; then
+ if [ "$1" = "-h" -o "$1" = "--help" ]; then
+ usage
+ exit 0
+ fi
+ dbroot=$1
+fi
+
+if [ "`id -u`" != 0 ]; then
+ die "You must be root to uncage the database"
+fi
+
+# make sure pacman isn't running
+if [ -f /tmp/pacman.lck ]; then
+ die "Pacman lockfile was found. Cannot run while pacman is running."
+fi
+
+if [ ! -d $dbroot ]; then
+ die "$dbroot does not exist or is not a directory"
+fi
+
+# don't let pacman run while we do this
+touch /tmp/pacman.lck
+
+# step 1: sum the old db
+echo "==> md5sum'ing the old database..."
+find $dbroot -type f | sort | xargs md5sum >/tmp/pacsums.old
+
+echo "==> copying pacman.db contents back, note: the time needed to get a brew is now."
+mkdir $tmproot
+cp -a $dbroot/. $tmproot
+
+echo "==> unmounting old dbroot and moving new one in"
+umount $dbroot
+rmdir $dbroot
+mv $tmproot $dbroot
+
+echo "==> md5sum'ing the new database..."
+find $dbroot -type f | sort | xargs md5sum >/tmp/pacsums.new
+
+echo "==> checking integrity..."
+diff /tmp/pacsums.old /tmp/pacsums.new >/dev/null 2>&1
+if [ $? -ne 0 ]; then
+ # failed, move the old one back into place
+ rm -rf $dbroot
+ mkdir $dbroot
+ mount -a
+ die_r "integrity check FAILED, reverting to old database"
+fi
+
+echo "==> Removing old pacman.db"
+rm $pacmandb
+
+rm -f /tmp/pacman.lck /tmp/pacsums.old /tmp/pacsums.new
+
+echo
+echo "Finished. Your pacman database has been uncaged!. Welcome home."
+echo "You will need to remove the old mount line from your /etc/fstab"
+echo
+
+exit 0