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#!/usr/bin/bash | |
# | |
# pacman-optimize | |
# Generated from pacman-optimize.sh.in; do not edit by hand. | |
# | |
# Copyright (c) 2006-2016 Pacman Development Team <pacman-dev@archlinux.org> | |
# Copyright (c) 2002-2006 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-scripts' | |
export TEXTDOMAINDIR='/usr/share/locale' | |
USE_COLOR='y' | |
declare -r myver='5.0.2-dirty' | |
eval $(awk '/DBPath/ {print $1$2$3}' /etc/pacman.conf) | |
dbroot="${DBPath:-/var/lib/pacman/}" | |
plain() { | |
(( QUIET )) && return | |
local mesg=$1; shift | |
printf "${BOLD} ${mesg}${ALL_OFF}\n" "$@" >&1 | |
} | |
msg() { | |
(( QUIET )) && return | |
local mesg=$1; shift | |
printf "${GREEN}==>${ALL_OFF}${BOLD} ${mesg}${ALL_OFF}\n" "$@" >&1 | |
} | |
msg2() { | |
(( QUIET )) && return | |
local mesg=$1; shift | |
printf "${BLUE} ->${ALL_OFF}${BOLD} ${mesg}${ALL_OFF}\n" "$@" >&1 | |
} | |
ask() { | |
local mesg=$1; shift | |
printf "${BLUE}::${ALL_OFF}${BOLD} ${mesg}${ALL_OFF}" "$@" >&1 | |
} | |
warning() { | |
local mesg=$1; shift | |
printf "${YELLOW}==> $(gettext "WARNING:")${ALL_OFF}${BOLD} ${mesg}${ALL_OFF}\n" "$@" >&2 | |
} | |
error() { | |
local mesg=$1; shift | |
printf "${RED}==> $(gettext "ERROR:")${ALL_OFF}${BOLD} ${mesg}${ALL_OFF}\n" "$@" >&2 | |
} | |
usage() { | |
printf "pacman-optimize (pacman) %s\n\n" "$myver" | |
printf -- "$(gettext "Usage: %s [--nocolor] [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 -- "$(gettext "\ | |
Copyright (c) 2006-2016 Pacman Development Team <pacman-dev@archlinux.org>.\n\ | |
Copyright (C) 2002-2006 Judd Vinet <jvinet@zeroflux.org>.\n\n\ | |
This is free software; see the source for copying conditions.\n\ | |
There is NO WARRANTY, to the extent permitted by law.\n")" | |
} | |
die() { | |
error "$@" | |
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 gettext &>/dev/null; then | |
gettext() { | |
echo "$@" | |
} | |
fi | |
if [[ $1 = "-h" || $1 = "--help" ]]; then | |
usage | |
exit 0 | |
fi | |
if [[ $1 = "-V" || $1 = "--version" ]]; then | |
version | |
exit 0 | |
fi | |
if [[ $1 = "--nocolor" ]]; then | |
USE_COLOR='n' | |
shift | |
fi | |
# check if messages are to be printed using color | |
unset ALL_OFF BOLD BLUE GREEN RED YELLOW | |
if [[ -t 2 && ! $USE_COLOR = "n" ]]; then | |
# prefer terminal safe colored and bold text when tput is supported | |
if tput setaf 0 &>/dev/null; then | |
ALL_OFF="$(tput sgr0)" | |
BOLD="$(tput bold)" | |
BLUE="${BOLD}$(tput setaf 4)" | |
GREEN="${BOLD}$(tput setaf 2)" | |
RED="${BOLD}$(tput setaf 1)" | |
YELLOW="${BOLD}$(tput setaf 3)" | |
else | |
ALL_OFF="\e[1;0m" | |
BOLD="\e[1;1m" | |
BLUE="${BOLD}\e[1;34m" | |
GREEN="${BOLD}\e[1;32m" | |
RED="${BOLD}\e[1;31m" | |
YELLOW="${BOLD}\e[1;33m" | |
fi | |
fi | |
readonly ALL_OFF BOLD BLUE GREEN RED YELLOW | |
if [[ -n $1 ]]; then | |
dbroot="$1" | |
fi | |
if ! type -p openssl >/dev/null; then | |
die "$(gettext "Cannot find the %s binary required for verifying integrity.")" "openssl" | |
fi | |
if [[ ! -d $dbroot || ! -d $dbroot/local ]]; then | |
die "$(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 | |
# strip any trailing slash from our dbroot | |
dbroot="${dbroot%/}" | |
lockfile="${dbroot}/db.lck" | |
localdb="${dbroot}/local" | |
# make sure pacman isn't running | |
if [[ -f $lockfile ]]; then | |
die "$(gettext "Pacman lock file was found. Cannot run while pacman is running.")" | |
fi | |
# do not let pacman run while we do this | |
touch "$lockfile" | |
workdir=$(mktemp -d "${TMPDIR:-/tmp}/pacman-optimize.XXXXXXXXXX") || | |
die_r "$(gettext "Cannot create temporary directory for database building.")\n" >&2 | |
# step 1: sum the old db | |
msg "$(gettext "MD5sum'ing the old database...")" | |
(cd "$localdb" && find . -type f -print0 | \ | |
xargs -0 openssl dgst -md5 | sort > "$workdir/pacsums.old") | |
# step 2: tar it up | |
msg "$(gettext "Tar'ing up %s...")" "$localdb" | |
(cd "$localdb" && bsdtar -czf "$workdir/pacman-db.tar.gz" ./*) | |
if (( $? )); then | |
rm -rf "$workdir" | |
die_r "$(gettext "Tar'ing up %s failed.")" "$localdb" | |
fi | |
# step 3: make and sum the new db side-by-side with the old | |
msg "$(gettext "Making and MD5sum'ing the new database...")" | |
mkdir "$localdb.new" | |
bsdtar -xpf "$workdir/pacman-db.tar.gz" -C "$localdb.new" | |
if (( $? )); then | |
rm -rf "$workdir" | |
die_r "$(gettext "Untar'ing %s failed.")" "$localdb" | |
fi | |
# immediate sync following extraction should get it written continuously on HDD | |
msg "$(gettext "Syncing database to disk...")" | |
sync | |
(cd "$localdb.new" && find . -type f -print0 | \ | |
xargs -0 openssl dgst -md5 | sort > "$workdir/pacsums.new") | |
# step 4: compare the sums | |
msg "$(gettext "Checking integrity...")" | |
read -ra old_dgst < <(openssl dgst -md5 < "$workdir/pacsums.old") | |
read -ra new_dgst < <(openssl dgst -md5 < "$workdir/pacsums.new") | |
if [[ ${old_dgst[@]:(-1)} != ${new_dgst[@]:(-1)} ]]; then | |
# failed | |
# leave our pacman-optimize tmpdir for checking to see what doesn't match up | |
rm -rf "$localdb.new" | |
die_r "$(gettext "Integrity check FAILED, reverting to old database.")" | |
fi | |
# step 5: shuffle the newly extracted DB into the proper location | |
msg "$(gettext "Rotating database into place...")" | |
fail=0 | |
mv "$localdb" "$localdb.old" || fail=1 | |
mv "$localdb.new" "$localdb" || fail=1 | |
chmod $(stat -c '%a' "$localdb.old") "$localdb" || fail=1 | |
chown $(stat -c '%u:%g' "$localdb.old") "$localdb" || fail=1 | |
if (( fail )); then | |
# failure with our directory shuffle | |
die_r "$(gettext "New database substitution failed. Check for %s, %s, and %s directories.")" "$localdb" "$localdb.old" "$localdb.new" | |
fi | |
rm -rf "$localdb.old" | |
# remove the lock file and our working directory with sums and tarfile | |
rm -f "$lockfile" | |
rm -rf "$workdir" | |
echo | |
msg "$(gettext "Finished. Your pacman database has been optimized.")" | |
echo | |
exit 0 | |
# vim: set noet: |
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