diff options
author | Judd Vinet <judd@archlinux.org> | 2005-10-20 20:46:35 +0000 |
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committer | Judd Vinet <judd@archlinux.org> | 2005-10-20 20:46:35 +0000 |
commit | 6851ce24abf07ac8bfe1406944351608ab0cfb1b (patch) | |
tree | 372ddef9e88e91e13b5a24fdc8ce469102537b79 /scripts/pacman-optimize | |
parent | e37bc739bd704d5d0ac22d28d9f5a9334c61707e (diff) |
copied up-to-date scripts from pacman 2.9.7
Diffstat (limited to 'scripts/pacman-optimize')
-rwxr-xr-x | scripts/pacman-optimize | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/scripts/pacman-optimize b/scripts/pacman-optimize new file mode 100755 index 00000000..34a2667a --- /dev/null +++ b/scripts/pacman-optimize @@ -0,0 +1,114 @@ +#!/bin/bash +# +# pacman-optimize +# +# Copyright (c) 2002-2005 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='2.9.7' + +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 "contiguous 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() { + echo "pacman-optimize: $*" >&2 + 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 + +if [ "`id -u`" != 0 ]; then + die "You must be root to optimize 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 + +# step 1: copy the entire db directory to a new one +echo "==> copying $dbroot..." +cp -a $dbroot $dbroot.new || die_r "error copying $dbroot" + +# step 2: switch the directory names and sum the new one +echo "==> md5sum'ing the new database..." +mv $dbroot $dbroot.bak || die_r "error renaming $dbroot" +mv $dbroot.new $dbroot || die_r "error renaming $dbroot.new" +find $dbroot -type f | sort | xargs md5sum >/tmp/pacsums.new + +# step 3: compare sums +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 + mv $dbroot.bak $dbroot + die_r "integrity check FAILED, reverting to old database" +fi + +# step 4: remove the backup +echo "==> removing old database..." +rm -rf $dbroot.bak || die_r "error removing backup $dbroot.bak" + +# remove the lock and sum files +rm -f /tmp/pacman.lck /tmp/pacsums.old /tmp/pacsums.new + +echo +echo "Finished. Your pacman database has been optimized." +echo + +exit 0 + |