#!/bin/bash # # pacman-optimize # @configure_input@ # # 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, see <http://www.gnu.org/licenses/>. # # gettext initialization export TEXTDOMAIN='pacman' export TEXTDOMAINDIR='@localedir@' myver='@PACKAGE_VERSION@' dbroot='@localstatedir@/lib/pacman/' lockfile="${dbroot}db.lck" msg() { local mesg=$1; shift printf "==> ${mesg}\n" "$@" >&2 } error () { local mesg=$1; shift printf "==> ERROR: ${mesg}\n" "$@" >&2 } usage() { printf "pacman-optimize (pacman) %s\n\n" "$myver" printf "$(gettext "Usage: %s [pacman_db_root]")\n\n" "$0" printf "$(gettext "\ pacman-optimize is a little hack that should improve the performance\n\ of pacman when reading/writing to its filesystem-based database.\n\n")" printf "$(gettext "\ Because pacman uses many small files to keep track of packages,\n\ there is a tendency for these files to become fragmented over time.\n\ This script attempts to relocate these small files into one\n\ continuous location on your hard drive. The result is that the hard\n\ drive should be able to read them faster, since the hard drive head\n\ does not have to move around the disk as much.\n")" } version() { printf "pacman-optimize (pacman) %s\n" "$myver" printf "$(gettext "\ Copyright (C) 2002-2007 Judd Vinet <jvinet@zeroflux.org>.\n\n\ This is free software; see the source for copying conditions.\n\ There is NO WARRANTY, to the extent permitted by law.\n")" } die() { error "$@" exit 1 } die_r() { rm -f "$lockfile" die "$@" } # PROGRAM START # determine whether we have gettext; make it a no-op if we do not if [ ! $(type -t gettext) ]; then gettext() { echo "$@" } fi if [ "$1" = "-h" -o "$1" = "--help" ]; then usage exit 0 fi if [ "$1" = "-V" -o "$1" = "--version" ]; then version exit 0 fi if [ "$1" != "" ]; then dbroot="$1" fi # make sure diff is installed if ! type diff >/dev/null 2>&1; then die "$(gettext "diff tool was not found, please install diffutils.")" fi # make sure pacman isn't running if [ -f "$lockfile" ]; then die "$(gettext "Pacman lock file was found. Cannot run while pacman is running.")" fi if [ ! -d "$dbroot" ]; then die "$(gettext "%s does not exist or is not a directory.")" "$dbroot" fi if [ ! -w "$dbroot" ]; then die "$(gettext "You must have correct permissions to optimize the database.")" fi workdir=$(mktemp -d /tmp/pacman-optimize.XXXXXXXXXX) || die_r "$(gettext "ERROR: Can not create temp directory for database building.")\n" >&2 # do not let pacman run while we do this touch "$lockfile" # step 1: sum the old db msg "$(gettext "MD5sum'ing the old database...")" find "$dbroot" -type f | sort | xargs md5sum > "$workdir/pacsums.old" # step 2: tar it up msg "$(gettext "Tar'ing up %s...")" "$dbroot" cd "$dbroot" bsdtar -czf "$workdir/pacmanDB.tgz" ./ if [ $? -ne 0 ]; then rm -rf "$workdir" die_r "$(gettext "Tar'ing up %s failed.")" "$dbroot" fi # step 3: make and sum the new db msg "$(gettext "Making and MD5sum'ing the new db...")" mkdir "$dbroot.new" bsdtar -zxpf "$workdir/pacmanDB.tgz" -C "$dbroot.new/" if [ $? -ne 0 ]; then rm -rf "$workdir" die_r "$(gettext "Untar'ing %s failed.")" "$dbroot" fi find "$dbroot.new" -type f | sort | \ xargs md5sum | sed 's#.new/##' > "$workdir/pacsums.new" # step 4: compare the sums msg "$(gettext "Checking integrity...")" diff "$workdir/pacsums.old" "$workdir/pacsums.new" >/dev/null 2>&1 if [ $? -ne 0 ]; then # failed # leave /tmp/pacsums.old and .new for checking to see what doesn't match up rm -rf "$dbroot.new" die_r "$(gettext "Integrity check FAILED, reverting to old database.")" fi # step 5: remove the new temporary database and the old one # and use the .tgz to replace the old one msg "$(gettext "Putting the new database in place...")" rm -rf "$dbroot.new" "$dbroot"/* bsdtar -zxpf "$workdir/pacmanDB.tgz" -C "$dbroot/" # remove the lock file, sum files, and .tgz of database rm -f "$lockfile" rm -rf "$workdir" echo msg "$(gettext "Finished. Your pacman database has been optimized.")" msg "$(gettext "For full benefits of pacman-optimize, run 'sync' now.")" echo exit 0 # vim: set ts=2 sw=2 noet: