#!/bin/bash # # pacman-optimize # # Copyright (c) 2002-2006 by Judd Vinet <jvinet@zeroflux.org> # # 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='3.0.0' error() { if [ "$USECOLOR" = "YES" -o "$USECOLOR" = "yes" ]; then echo -e "\033[1;31m:: ERROR:\033[1;0m \033[1;1m$@\033[1;0m" >&2 else echo ":: ERROR: $@" >&2 fi } source /etc/rc.conf #for USECOLOR source /etc/rc.d/functions usage() { echo "pacman-optimize $myver" echo "usage: $0 [pacman_db_root]" echo echo "pacman-optimize is a little hack that should improve the performance" echo "of pacman when reading/writing to its filesystem-based database." echo echo "Because pacman uses many small files to keep track of packages," echo "there is a tendency for these files to become fragmented over time." echo "This script attempts to relocate these small files into one" echo "continuous location on your hard drive. The result is that the hard" echo "drive should be able to read them faster, since the hard drive head" echo "does not have to move around the disk as much." echo } die() { error $@ exit 1 } die_r() { rm -f /tmp/pacman.lck die $@ } dbroot="/var/lib/pacman" if [ "$1" != "" ]; then if [ "$1" = "-h" -o "$1" = "--help" ]; then usage exit 0 fi dbroot="$1" fi # make sure pacman isn't running if [ -f /tmp/pacman.lck ]; then die "Pacman lockfile was found. Cannot run while pacman is running." fi if [ ! -d "$dbroot" ]; then die "$dbroot does not exist or is not a directory" fi if [ ! -w "$dbroot" ]; then die "You must have correct permissions to optimize the database" fi # do not let pacman run while we do this touch /tmp/pacman.lck # step 1: sum the old db stat_busy "Md5sum'ing the old database" find $dbroot -type f | sort | xargs md5sum > /tmp/pacsums.old stat_done # step 2: tar it up stat_busy "Tar'ing up $dbroot" cd $dbroot tar -czf /tmp/pacmanDB.tgz ./ if [ $? -ne 0 ]; then stat_fail rm -f /tmp/pacmanDB.tgz /tmp/pacsums.old die_r "tar'ing up $dbroot failed" fi stat_done # step 3: make and sum the new db stat_busy "Making and md5sum'ing the new db" mkdir $dbroot.new tar -zxpf /tmp/pacmanDB.tgz -C $dbroot.new/ if [ $? -ne 0 ]; then rm -f /tmp/pacmanDB.tgz /tmp/pacsums.old rm -rf "$dbroot.new" die_r "untar'ing $dbroot failed" fi find "$dbroot.new" -type f | sort | sed -e 's/pacman.new/pacman/g' |\ xargs md5sum > /tmp/pacsums.new stat_done # step 4: compare the sums stat_busy "Checking integrity" diff /tmp/pacsums.old /tmp/pacsums.new >/dev/null 2>&1 if [ $? -ne 0 ]; then # failed stat_fail # leave /tmp/pacsums.old and .new for checking to see what doesn't match up rm -rf "$dbroot.new" /tmp/pacman.lck /tmp/pacmanDB.tgz die_r "integrity check FAILED, reverting to old database" fi stat_done # step 5: remove the new temporary database and the old one # and use the .tgz to replace the old one stat_busy "Putting the new database in place" rm -rf "$dbroot.new" "$dbroot"/* tar -zxpf /tmp/pacmanDB.tgz -C "$dbroot"/ stat_done # remove the lock file, sum files, and .tgz of database rm -f /tmp/pacman.lck /tmp/pacsums.old /tmp/pacsums.new /tmp/pacmanDB.tgz echo echo "Finished. Your pacman database has been optimized." echo exit 0 # vim: set ts=2 sw=2 noet: