mariadb: Check and fix datadir owner issues during upgrade

If you are migrating to MariaDB package, you might have old datadir
stored somewhere using different setup with different users. If you
trust us enough to enable autoupgrade, you probably trust us enough to
chown your datadir as well. This can prevent some potential issues.

Signed-off-by: Michal Hrusecky <michal.hrusecky@turris.com>

diff --git a/utils/mariadb/files/mysqld.init b/utils/mariadb/files/mysqld.init
index f206971611006a15d7dd8e37bd8d191c8fb0dde4..8fff379e1cf97cafb47a2b6b98e85ccaca096884 100644 (file)
--- a/utils/mariadb/files/mysqld.init
+++ b/utils/mariadb/files/mysqld.init
@@ -152,6 +152,12 @@ start_service() {
        # Migration from old versions
        # shellcheck disable=SC2154
        if [ "$(cat "$datadir"/.version 2> /dev/null)" \!= "$version" ] && [ "$autoupgrade" -gt 0 ]; then
+               # Check for correct owner
+               local owner="$(stat --format %U:%G "$datadir" 2> /dev/null)"
+               if [ -n "$owner" ] && [ "$owner" != "$my_user:$my_group" ]; then
+                       chown -Rh "$my_user:$my_group" "$datadir"
+               fi
+
                # Start upgrade instance without credentials
                sudo -u "$my_user" mysqld --skip-networking --skip-grant-tables --socket=/tmp/mysql_upgrade.sock &
                PID="$!"