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Diffstat (limited to 'scripts/pacman-optimize.in')
| -rwxr-xr-x | scripts/pacman-optimize.in | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/scripts/pacman-optimize.in b/scripts/pacman-optimize.in new file mode 100755 index 00000000..2bfec40e --- /dev/null +++ b/scripts/pacman-optimize.in @@ -0,0 +1,158 @@ +#!/bin/bash +# +# pacman-optimize +# +# Copyright (c) 2002-2007 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='@PACKAGE_VERSION@' + +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: $0 [pacman_db_root]" + echo + echo "pacman-optimize is a little hack that should improve the performance" + echo "of pacman when reading/writing to its filesystem-based database." + echo + echo "Because pacman uses many small files to keep track of packages," + echo "there is a tendency for these files to become fragmented over time." + echo "This script attempts to relocate these small files into one" + echo "continuous location on your hard drive. The result is that the hard" + echo "drive should be able to read them faster, since the hard drive head" + echo "does not have to move around the disk as much." + echo +} + +version() { + printf "pacman-optimize (pacman) %s\n" "$myver" + printf "Copyright (C) 2002-2007 Judd Vinet <jvinet@zeroflux.org>.\n" + echo + printf "This is free software; see the source for copying conditions.\n" + printf "There is NO WARRANTY, to the extent permitted by law.\n" + 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 + if [ "$1" = "-V" -o "$1" = "--version" ]; then + version + 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: |