FM / dpkg

/usr/share/dbconfig-common/dpkg

Name	Size	Mode	Actions
common	39711	0644	edit dl rm
config	23411	0644	edit dl rm
config.mysql	68	0644	edit dl rm
config.pgsql	69	0644	edit dl rm
config.sqlite3	71	0644	edit dl rm
frontend.config	61	0644	edit dl rm
frontend.config.mysql	67	0644	edit dl rm
frontend.config.pgsql	67	0644	edit dl rm
frontend.postinst	63	0644	edit dl rm
frontend.postinst.mysql	69	0644	edit dl rm
frontend.postinst.pgsql	69	0644	edit dl rm
frontend.postrm	61	0644	edit dl rm
frontend.postrm.mysql	67	0644	edit dl rm
frontend.postrm.pgsql	67	0644	edit dl rm
frontend.preinst	62	0644	edit dl rm
frontend.preinst.mysql	68	0644	edit dl rm
frontend.preinst.pgsql	68	0644	edit dl rm
frontend.prerm	60	0644	edit dl rm
frontend.prerm.mysql	66	0644	edit dl rm
frontend.prerm.pgsql	66	0644	edit dl rm
postinst	20780	0644	edit dl rm
postinst.mysql	70	0644	edit dl rm
postinst.pgsql	70	0644	edit dl rm
postinst.sqlite3	72	0644	edit dl rm
postrm	986	0644	edit dl rm
postrm.mysql	68	0644	edit dl rm
postrm.pgsql	68	0644	edit dl rm
postrm.sqlite3	70	0644	edit dl rm
preinst	431	0644	edit dl rm
preinst.mysql	69	0644	edit dl rm
preinst.pgsql	70	0644	edit dl rm
preinst.sqlite3	71	0644	edit dl rm
prerm	5825	0644	edit dl rm
prerm.mysql	67	0644	edit dl rm
prerm.pgsql	67	0644	edit dl rm
prerm.sqlite3	69	0644	edit dl rm

Edit: /usr/share/dbconfig-common/dpkg/prerm (5825B)

# -*- mode: sh -*-
###
### some global variables etc
###
dbc_go(){
    local need_admin_pw dumpfile nowtime rmscript rmsql purgescript purgesql tsubstfile

. /usr/share/dbconfig-common/dpkg/common
    _dbc_debug "(prerm) dbc_go() $@"

## With dbconfig-no-thanks installed we don't need to do anything.
    if dbc_no_thanks ; then
        return 0
    fi

dbc_config "$@" || return $?

###
    ### get all the settings we need
    ###
    dbc_read_package_config || return $?
    # and re-run config for db-specific settings
    dbc_set_dbtype_defaults $dbc_dbtype || return $?

if echo "$dbc_authenticated_dbtypes" | grep -q "$dbc_dbtype"; then
        if [ "$dbc_dbtype" = "pgsql" ] && \
               [ "$dbc_authmethod_admin" = "ident" ];
        then
            need_admin_pw=""
        else
            need_admin_pw="yup"
            # Note: dpkg/config has the same code
            if [ "$dbc_dbtype" = mysql ] && _dbc_mysql_get_debian_sys_maint ; then
                db_set $dbc_package/$dbc_dbtype/admin-user "$dbc_dbadmin"
                db_fset $dbc_package/$dbc_dbtype/admin-user seen true
                db_set $dbc_package/$dbc_dbtype/admin-pass "$dbc_dbadmpass"
                db_fset $dbc_package/$dbc_dbtype/admin-pass seen true
            fi
        fi
    else
        need_admin_pw=""
    fi

if [ "$dbc_command" = "remove" ] && [ ! "$dbc_frontend" ]; then
        ###
        ### if they didn't want our help installing,  we should assume
        ### they don't want our help removing either
        ###
        if [ "$dbc_install" != "true" ]; then return 0; fi

###
        ### ask the admin if we should help with removal
        ### but only if they didn't see the question before
        ### or if we are here after an error
        ###
        if [ "$dbc_remove" ]; then
            db_set $dbc_package/dbconfig-remove "$dbc_remove"
        fi
        db_input $dbc_prio_high $dbc_package/dbconfig-remove || true
        db_go || true
        db_get $dbc_package/dbconfig-remove && dbc_remove="$RET"

if [ "$dbc_remove" != "true" ]; then
            return 0;
        fi

###
        ###	package removal hooks
        ###
        rmscript=/usr/share/dbconfig-common/scripts/$dbc_package/remove/$dbc_dbtype
        rmsql=/usr/share/dbconfig-common/data/$dbc_package/remove/$dbc_dbtype
        # run the script if it exists
        if [ -f "$rmscript" ]; then
            # get the admin user password; required by documentation
            if [ "$need_admin_pw" ]; then
                dbc_get_admin_pass || return $?
            fi
            dbc_logpart "running maintainer removal script hook... "
            if ! sh -c "$rmscript \"$@\""; then
                dbc_error="$rmscript existed with non-zero status"
                dbc_remove_error "running maintainer removal hook" || return $?
                [ "$dbc_tried_again" ] && return 0
            fi
            dbc_logline "done"
        fi
        # run the sql if it exists
        if [ -f "$rmsql" ]; then
            # get the admin user password; required by documentation
            if [ "$need_admin_pw" ]; then
                dbc_get_admin_pass || return $?
            fi
            dbc_logpart "running maintainer removal sql hook... "
            if [ ! "$dbc_sql_substitutions" ]; then
                $dbc_sqlfile_cmd $rmsql || \
                    dbc_remove_error "running maintainer removal sql hook" || \
                    return $?
                [ "$dbc_tried_again" ] && return 0
            else
                tsubstfile=$(dbc_mktemp)
                /usr/sbin/dbconfig-generate-include -f template -o template_infile=$rmsql $dbc_packageconfig > $tsubstfile
                $dbc_sqlfile_cmd $tsubstfile || \
                    dbc_remove_error "running maintainer removal sql hook" || \
                    return $?
                rm -f $tsubstfile
                [ "$dbc_tried_again" ] && return 0
            fi
            dbc_logline "done"
        fi

###
        ### ask the admin if the database should be purged
        ### but only if they didn't see the question before
        ### or if we are here after an error
        ###
        db_input $dbc_prio_high $dbc_package/purge || true
        db_go || true
        db_get $dbc_package/purge
        dbc_purge="$RET"

if [ "$dbc_purge" = "true" ]; then
            # get the admin user password
            if [ "$need_admin_pw" ]; then
                dbc_get_admin_pass || return $?
            fi

# dump the database into a temporary file
            # Note: nearly equal logic exists in postinst; probably
            # should stay in sync
            nowtime=$(date +%Y-%m-%d-%H.%M)
            if [ ! $(dirname /var/tmp/$dbc_package) = /var/tmp ]; then
                mkdir -p $(dirname /var/tmp/$dbc_package)
            fi
            dumpfile=$(mktemp /var/tmp/$dbc_package.$dbc_dbname.$nowtime.$dbc_dbtype.XXXXXX)
            if [ ! -f $dumpfile ]; then
                dbc_remove_error "creating temporary file for database dump" || \
                    return $?
                [ "$dbc_tried_again" ] && return 0
            fi
            dbc_logline "dbconfig-common: dumping $dbc_dbtype database $dbc_dbname to $dumpfile"
            $dbc_dump_cmd $dumpfile || dbc_remove_error "dumping database" || \
                return $?
            [ "$dbc_tried_again" ] && return 0
            dbc_logline "dbconfig-common: dropping $dbc_dbtype database $dbc_dbname"
            $dbc_dropdb_cmd || dbc_remove_error "dropping database" || return $?
            [ "$dbc_tried_again" ] && return 0

dbc_logline "dbconfig-common: revoking privileges for user $dbc_dbuser on $dbc_dbname"
            $dbc_dropuser_cmd
        fi
    fi
}

cmd: