165 lines
4.4 KiB
Bash
165 lines
4.4 KiB
Bash
#!/bin/bash
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#
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# pacman-optimize
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#
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# Copyright (c) 2002-2007 by Judd Vinet <jvinet@zeroflux.org>
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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# USA.
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#
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myver='@PACKAGE_VERSION@'
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#TODO replace with configure-time db location
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dbroot="/var/lib/pacman"
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#TODO replace with configure-time lockfile location
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lockfile="/tmp/pacman.lck"
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error() {
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if [ "$USECOLOR" = "YES" -o "$USECOLOR" = "yes" ]; then
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echo -e "\033[1;31m:: ERROR:\033[1;0m \033[1;1m$@\033[1;0m" >&2
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else
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echo ":: ERROR: $@" >&2
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fi
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}
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# determine current USECOLOR setting
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#[ -f "/etc/rc.conf" ] && source /etc/rc.conf
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#[ -f "/etc/rc.d/functions" ] && source /etc/rc.d/functions
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usage() {
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echo "pacman-optimize (pacman) $myver"
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echo "usage: $0 [pacman_db_root]"
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echo
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echo "pacman-optimize is a little hack that should improve the performance"
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echo "of pacman when reading/writing to its filesystem-based database."
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echo
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echo "Because pacman uses many small files to keep track of packages,"
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echo "there is a tendency for these files to become fragmented over time."
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echo "This script attempts to relocate these small files into one"
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echo "continuous location on your hard drive. The result is that the hard"
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echo "drive should be able to read them faster, since the hard drive head"
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echo "does not have to move around the disk as much."
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echo
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}
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version() {
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printf "pacman-optimize (pacman) %s\n" "$myver"
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printf "Copyright (C) 2002-2007 Judd Vinet <jvinet@zeroflux.org>.\n"
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echo
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printf "This is free software; see the source for copying conditions.\n"
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printf "There is NO WARRANTY, to the extent permitted by law.\n"
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echo
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}
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die() {
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error $@
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exit 1
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}
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die_r() {
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rm -f $lockfile
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die $@
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}
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if [ "$1" = "-h" -o "$1" = "--help" ]; then
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usage
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exit 0
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fi
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if [ "$1" = "-V" -o "$1" = "--version" ]; then
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version
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exit 0
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fi
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if [ "$1" != "" ]; then
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dbroot="$1"
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fi
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# make sure pacman isn't running
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if [ -f $lockfile ]; then
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die "Pacman lockfile was found. Cannot run while pacman is running."
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fi
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if [ ! -d "$dbroot" ]; then
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die "$dbroot does not exist or is not a directory"
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fi
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if [ ! -w "$dbroot" ]; then
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die "You must have correct permissions to optimize the database"
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fi
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# do not let pacman run while we do this
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touch $lockfile
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# step 1: sum the old db
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stat_busy "Md5sum'ing the old database"
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find $dbroot -type f | sort | xargs md5sum > /tmp/pacsums.old
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stat_done
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# step 2: tar it up
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stat_busy "Tar'ing up $dbroot"
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cd $dbroot
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tar -czf /tmp/pacmanDB.tgz ./
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if [ $? -ne 0 ]; then
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stat_fail
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rm -f /tmp/pacmanDB.tgz /tmp/pacsums.old
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die_r "tar'ing up $dbroot failed"
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fi
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stat_done
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# step 3: make and sum the new db
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stat_busy "Making and md5sum'ing the new db"
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mkdir $dbroot.new
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tar -zxpf /tmp/pacmanDB.tgz -C $dbroot.new/
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if [ $? -ne 0 ]; then
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rm -f /tmp/pacmanDB.tgz /tmp/pacsums.old
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rm -rf "$dbroot.new"
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die_r "untar'ing $dbroot failed"
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fi
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find "$dbroot.new" -type f | sort | sed -e 's/pacman.new/pacman/g' |\
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xargs md5sum > /tmp/pacsums.new
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stat_done
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# step 4: compare the sums
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stat_busy "Checking integrity"
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diff /tmp/pacsums.old /tmp/pacsums.new >/dev/null 2>&1
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if [ $? -ne 0 ]; then
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# failed
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stat_fail
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# leave /tmp/pacsums.old and .new for checking to see what doesn't match up
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rm -rf "$dbroot.new" $lockfile /tmp/pacmanDB.tgz
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die_r "integrity check FAILED, reverting to old database"
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fi
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stat_done
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# step 5: remove the new temporary database and the old one
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# and use the .tgz to replace the old one
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stat_busy "Putting the new database in place"
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rm -rf "$dbroot.new" "$dbroot"/*
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tar -zxpf /tmp/pacmanDB.tgz -C "$dbroot"/
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stat_done
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# remove the lock file, sum files, and .tgz of database
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rm -f $lockfile /tmp/pacsums.old /tmp/pacsums.new /tmp/pacmanDB.tgz
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echo
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echo "Finished. Your pacman database has been optimized."
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echo
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exit 0
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# vim: set ts=2 sw=2 noet:
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