mirror of
https://github.com/moparisthebest/pacman
synced 2024-12-23 08:18:51 -05:00
64e2eba268
FS#5009 fixes - use tar on the pacman DB so as to handle cases where the
base directory cannot be 'mv'ed and other such edge cases.
131 lines
3.5 KiB
Bash
Executable File
131 lines
3.5 KiB
Bash
Executable File
#!/bin/bash
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#
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# pacman-optimize
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#
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# Copyright (c) 2002-2006 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='3.0.0'
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error() {
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echo -e "\033[1;31m:: ERROR:\033[1;0m\033[1;1m$@\033[1;0m" >&2
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}
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source /etc/rc.d/functions
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usage() {
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echo "pacman-optimize $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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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 /tmp/pacman.lck
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die $@
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}
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dbroot="/var/lib/pacman"
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if [ "$1" != "" ]; then
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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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dbroot="$1"
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fi
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# make sure pacman isn't running
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if [ -f /tmp/pacman.lck ]; then
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die "Pacman lockfile was found. Cannot run while pacman is running."
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fi
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if [ ! -d "$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 /tmp/pacman.lck
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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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stat_fail && die_r "tar'ing up $dbroot failed"
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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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stat_fail && die_r "untar'ing $dbroot failed"
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find $dbroot.new -type -f | sort | 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" /tmp/pacman.lck /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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# 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 /tmp/pacman.lck /tmp/pacmsums.old /tmp/pacmsums.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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