diff options
Diffstat (limited to 'scripts/pacman-optimize.sh.in')
| -rw-r--r-- | scripts/pacman-optimize.sh.in | 55 |
1 files changed, 34 insertions, 21 deletions
diff --git a/scripts/pacman-optimize.sh.in b/scripts/pacman-optimize.sh.in index 0cd108b7..dbb8ed00 100644 --- a/scripts/pacman-optimize.sh.in +++ b/scripts/pacman-optimize.sh.in @@ -25,7 +25,6 @@ export TEXTDOMAINDIR='@localedir@' myver='@PACKAGE_VERSION@' dbroot='@localstatedir@/lib/pacman/' -lockfile="${dbroot}db.lck" msg() { local mesg=$1; shift @@ -98,11 +97,6 @@ if ! type diff >/dev/null 2>&1; then die "$(gettext "diff tool was not found, please install diffutils.")" fi -# make sure pacman isn't running -if [ -f "$lockfile" ]; then - die "$(gettext "Pacman lock file was found. Cannot run while pacman is running.")" -fi - if [ ! -d "$dbroot" ]; then die "$(gettext "%s does not exist or is not a directory.")" "$dbroot" fi @@ -111,12 +105,21 @@ if [ ! -w "$dbroot" ]; then die "$(gettext "You must have correct permissions to optimize the database.")" fi -workdir=$(mktemp -d /tmp/pacman-optimize.XXXXXXXXXX) || - die_r "$(gettext "ERROR: Can not create temp directory for database building.")\n" >&2 +# strip any trailing slash from our dbroot +dbroot="${dbroot%/}" +# form the path to our lockfile location +lockfile="${dbroot}/db.lck" +# make sure pacman isn't running +if [ -f "$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=$(mktemp -d /tmp/pacman-optimize.XXXXXXXXXX) || + die_r "$(gettext "ERROR: Can not create temp directory for database building.")\n" >&2 + # step 1: sum the old db msg "$(gettext "MD5sum'ing the old database...")" find "$dbroot" -type f | sort | xargs md5sum > "$workdir/pacsums.old" @@ -124,46 +127,56 @@ find "$dbroot" -type f | sort | xargs md5sum > "$workdir/pacsums.old" # step 2: tar it up msg "$(gettext "Tar'ing up %s...")" "$dbroot" cd "$dbroot" -bsdtar -czf "$workdir/pacmanDB.tgz" ./ +bsdtar -czf "$workdir/pacman-db.tar.gz" ./ if [ $? -ne 0 ]; then rm -rf "$workdir" die_r "$(gettext "Tar'ing up %s failed.")" "$dbroot" fi -# step 3: make and sum the new db -msg "$(gettext "Making and MD5sum'ing the new db...")" +# step 3: make and sum the new db side-by-side with the old +msg "$(gettext "Making and MD5sum'ing the new database...")" mkdir "$dbroot.new" -bsdtar -zxpf "$workdir/pacmanDB.tgz" -C "$dbroot.new/" +bsdtar -xpf "$workdir/pacman-db.tar.gz" -C "$dbroot.new" if [ $? -ne 0 ]; then rm -rf "$workdir" die_r "$(gettext "Untar'ing %s failed.")" "$dbroot" fi +# immediate sync following extraction should get it written continuously on HDD +msg "$(gettext "Syncing database to disk...")" +sync find "$dbroot.new" -type f | sort | \ - xargs md5sum | sed 's#.new/##' > "$workdir/pacsums.new" + xargs md5sum | sed 's#.new##' > "$workdir/pacsums.new" # step 4: compare the sums msg "$(gettext "Checking integrity...")" diff "$workdir/pacsums.old" "$workdir/pacsums.new" >/dev/null 2>&1 if [ $? -ne 0 ]; then # failed - # leave /tmp/pacsums.old and .new for checking to see what doesn't match up + # leave our pacman-optimize tmpdir for checking to see what doesn't match up rm -rf "$dbroot.new" die_r "$(gettext "Integrity check FAILED, reverting to old database.")" fi -# step 5: remove the new temporary database and the old one -# and use the .tgz to replace the old one -msg "$(gettext "Putting the new database in place...")" -rm -rf "$dbroot.new" "$dbroot"/* -bsdtar -zxpf "$workdir/pacmanDB.tgz" -C "$dbroot/" +# step 5: shuffle the newly extracted DB into the proper location +msg "$(gettext "Rotating database into place...")" + +fail=0 +mv "$dbroot" "$dbroot.old" || fail=1 +mv "$dbroot.new" "$dbroot" || fail=1 +chmod --reference="$dbroot.old" "$dbroot" || fail=1 +chown --reference="$dbroot.old" "$dbroot" || fail=1 +if [ $fail -ne 0 ]; then + # failure with our directory shuffle + die_r "$(gettext "New database substitution failed. Check for $dbroot,\n$dbroot.old, and $dbroot.new directories.")" +fi +rm -rf "$dbroot.old" -# remove the lock file, sum files, and .tgz of database +# remove the lock file and our working directory with sums and tarfile rm -f "$lockfile" rm -rf "$workdir" echo msg "$(gettext "Finished. Your pacman database has been optimized.")" -msg "$(gettext "For full benefits of pacman-optimize, run 'sync' now.")" echo exit 0 |