diff options
| -rwxr-xr-x | scripts/pacman-optimize | 78 |
1 files changed, 46 insertions, 32 deletions
diff --git a/scripts/pacman-optimize b/scripts/pacman-optimize index 5b3c3b07..c0c7282f 100755 --- a/scripts/pacman-optimize +++ b/scripts/pacman-optimize @@ -22,33 +22,38 @@ myver='3.0.0' +error() { + echo -e "\033[1;31m:: ERROR:\033[1;0m\033[1;1m$@\033[1;0m" >&2 +} + +source /etc/rc.d/functions + usage() { echo "pacman-optimize $myver" echo "usage: $0 [pacman_db_root]" - echo + echo echo "pacman-optimize is a little hack that should improve the performance" echo "of pacman when reading/writing to its filesystem-based database." echo echo "Because pacman uses many small files to keep track of packages," echo "there is a tendency for these files to become fragmented over time." echo "This script attempts to relocate these small files into one" - echo "contiguous location on your hard drive. The result is that the hard" + echo "continuous location on your hard drive. The result is that the hard" echo "drive should be able to read them faster, since the hard drive head" echo "does not have to move around the disk as much." echo } die() { - echo "pacman-optimize: $*" >&2 + error $@ exit 1 } die_r() { rm -f /tmp/pacman.lck - die $* + die $@ } - dbroot="/var/lib/pacman" if [ "$1" != "" ]; then @@ -56,7 +61,7 @@ if [ "$1" != "" ]; then usage exit 0 fi - dbroot=$1 + dbroot="$1" fi # make sure pacman isn't running @@ -64,48 +69,57 @@ if [ -f /tmp/pacman.lck ]; then die "Pacman lockfile was found. Cannot run while pacman is running." fi -if [ ! -d $dbroot ]; then +if [ ! -d "$dbroot" ]; then die "$dbroot does not exist or is not a directory" fi -#if [ "$EUID" != 0 ]; then if [ ! -w "$dbroot" ]; then die "You must have correct permissions to optimize the database" fi -# don't let pacman run while we do this +# do not let pacman run while we do this touch /tmp/pacman.lck # step 1: sum the old db -echo "==> md5sum'ing the old database..." -find $dbroot -type f | sort | xargs md5sum >/tmp/pacsums.old - -# step 1: copy the entire db directory to a new one -echo "==> copying $dbroot..." -cp -a $dbroot $dbroot.new || die_r "error copying $dbroot" - -# step 2: switch the directory names and sum the new one -echo "==> md5sum'ing the new database..." -mv $dbroot $dbroot.bak || die_r "error renaming $dbroot" -mv $dbroot.new $dbroot || die_r "error renaming $dbroot.new" -find $dbroot -type f | sort | xargs md5sum >/tmp/pacsums.new - -# step 3: compare sums -echo "==> checking integrity..." +stat_busy "Md5sum'ing the old database" +find $dbroot -type f | sort | xargs md5sum > /tmp/pacsums.old +stat_done + +# step 2: tar it up +stat_busy "Tar'ing up $dbroot" +cd $dbroot +tar -czf /tmp/pacmanDB.tgz ./ || \ + stat_fail && die_r "tar'ing up $dbroot failed" +stat_done + +# step 3: make and sum the new db +stat_busy "Making and md5sum'ing the new db" +mkdir $dbroot.new +tar -zxpf /tmp/pacmanDB.tgz -C $dbroot.new/ || \ + stat_fail && die_r "untar'ing $dbroot failed" +find $dbroot.new -type -f | sort | xargs md5sum > /tmp/pacsums.new +stat_done + +# step 4: compare the sums +stat_busy "Checking integrity" diff /tmp/pacsums.old /tmp/pacsums.new >/dev/null 2>&1 if [ $? -ne 0 ]; then - # failed, move the old one back into place - rm -rf $dbroot - mv $dbroot.bak $dbroot + # failed + stat_fail + # leave /tmp/pacsums.old and .new for checking to see what doesn't match up + rm -rf "$dbroot.new" /tmp/pacman.lck /tmp/pacmanDB.tgz die_r "integrity check FAILED, reverting to old database" fi -# step 4: remove the backup -echo "==> removing old database..." -rm -rf $dbroot.bak || die_r "error removing backup $dbroot.bak" +# step 5: remove the new temporary database and the old one +# and use the .tgz to replace the old one +stat_busy "Putting the new database in place" +rm -rf "$dbroot.new" "$dbroot"/* +tar -zxpf /tmp/pacmanDB.tgz -C "$dbroot"/ +stat_done -# remove the lock and sum files -rm -f /tmp/pacman.lck /tmp/pacsums.old /tmp/pacsums.new +# remove the lock file, sum files, and .tgz of database +rm -f /tmp/pacman.lck /tmp/pacmsums.old /tmp/pacmsums.new /tmp/pacmanDB.tgz echo echo "Finished. Your pacman database has been optimized." |