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authorAaron Griffin <aaron@archlinux.org>2007-01-03 05:45:18 +0000
committerAaron Griffin <aaron@archlinux.org>2007-01-03 05:45:18 +0000
commit64e2eba2682823781bdac3862125129b5cf7ba54 (patch)
tree69b9f3204b81fa76510995928f3d2d06c4da0b76 /scripts
parent86c83009243d7a5c942a120fca9b450d907c48d2 (diff)
* James Rosten <seinfeld90@gmail.com>
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.
Diffstat (limited to 'scripts')
-rwxr-xr-xscripts/pacman-optimize78
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."