5 # Backup the 7 last versions of dpkg databases containing user data.
6 if cd /var
/backups
; then
7 # We backup all relevant database files if any has changed, so that
8 # the rotation number always contains an internally consistent set.
10 dbfiles
="arch status diversions statoverride"
11 for db
in $dbfiles ; do
12 if ! cmp -s dpkg.
${db}.0 $dbdir/$db ; then
17 if [ "$dbchanged" = "yes" ] ; then
18 for db
in $dbfiles ; do
19 [ -e
$dbdir/$db ] ||
continue
20 cp -p
$dbdir/$db dpkg.
$db
21 savelog
-c
7 dpkg.
$db >/dev
/null
25 # The alternatives database is independent from the dpkg database.
28 # Switch the alternatives database backups from xz to gzip, as the latter
29 # is Essential and we can rely on it being always present, using xz here
30 # is not worth the trouble, disk space savings, or possible additional
32 for dbseq
in `seq 1 6` ; do
33 dbfile
=${dbalt}.
tar.
${dbseq}
34 [ -e
"${dbfile}.xz" ] ||
continue
39 # XXX: Ideally we'd use --warning=none instead of discarding stderr, but
40 # as of GNU tar 1.27.1, it does not seem to work reliably (see #749307).
41 if ! test -e
${dbalt}.
tar.0 ||
42 ! tar -df
${dbalt}.
tar.0 -C
$dbdir $dbalt >/dev
/null
2>&1 ;
44 tar -cf
${dbalt}.
tar -C
$dbdir $dbalt >/dev
/null
2>&1
45 savelog
-c
7 ${dbalt}.
tar >/dev
/null