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Diffstat (limited to 'scripts/pacman-optimize.sh.in')
| -rw-r--r-- | scripts/pacman-optimize.sh.in | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/scripts/pacman-optimize.sh.in b/scripts/pacman-optimize.sh.in new file mode 100644 index 00000000..d4c926d8 --- /dev/null +++ b/scripts/pacman-optimize.sh.in @@ -0,0 +1,158 @@ +#!/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, write to the Free Software +# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, +# USA. +# + +# 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" "$myver" + echo + printf "$(gettext "Usage: %s[pacman_db_root]")\n" "$0" + echo + echo "$(gettext "pacman-optimize is a little hack that should improve the performance")" + echo "$(gettext "of pacman when reading/writing to its filesystem-based database.")" + echo + echo "$(gettext "Because pacman uses many small files to keep track of packages,")" + echo "$(gettext "there is a tendency for these files to become fragmented over time.")" + echo "$(gettext "This script attempts to relocate these small files into one")" + echo "$(gettext "continuous location on your hard drive. The result is that the hard")" + echo "$(gettext "drive should be able to read them faster, since the hard drive head")" + echo "$(gettext "does not have to move around the disk as much.")" + echo +} + +version() { + printf "pacman-optimize (pacman) %s\n" "$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 $lockfile + die $@ +} + +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 pacman isn't running +if [ -f $lockfile ]; then + die "$(gettext "Pacman lockfile 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 + +# 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 $dbroot -type f | sort | xargs md5sum > /tmp/pacsums.old + +# step 2: tar it up +msg "$(gettext "Tar'ing up %s...")" "$dbroot" +cd $dbroot +tar -czf /tmp/pacmanDB.tgz ./ +if [ $? -ne 0 ]; then + rm -f /tmp/pacmanDB.tgz /tmp/pacsums.old + die_r "$(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 +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 "$(gettext "Untar'ing $dbroot failed.")" +fi +find "$dbroot.new" -type f | sort | sed -e 's/pacman.new/pacman/g' | \ + xargs md5sum > /tmp/pacsums.new + +# step 4: compare the sums +msg "$(gettext "Checking integrity...")" +diff /tmp/pacsums.old /tmp/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" $lockfile /tmp/pacmanDB.tgz + die_r "$(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" "$dbroot"/* +tar -zxpf /tmp/pacmanDB.tgz -C "$dbroot"/ + +# remove the lock file, sum files, and .tgz of database +rm -f $lockfile /tmp/pacsums.old /tmp/pacsums.new /tmp/pacmanDB.tgz + +echo +echo "$(gettext "Finished. Your pacman database has been optimized.")" +echo + +exit 0 + +# vim: set ts=2 sw=2 noet: |