Option to reinstall mariadb from control panel

src/freedombone-controlpanel

@@ -1783,6 +1783,24 @@ function hotspot_settings {
 		   --msgbox $"Hotspot settings were changed" 6 40
 }
 
+function reinstall_mariadb {
+	dialog --title $"Reinstall MariaDB" \
+		   --backtitle $"Freedombone Control Panel" \
+		   --defaultno \
+		   --yesno $"\nThis should be a LAST RESORT, if the mysql daemon won't start. You will lose ALL databases and will then need to restore them from backup.\n\nAre you sure that you wish to continue?" 12 60
+	sel=$?
+	case $sel in
+		1) return;;
+		255) return;;
+	esac
+
+	clear
+	database_reinstall
+
+	dialog --title $"Reinstall MariaDB" \
+		   --msgbox $"MariaDB has been reinstalled" 6 40
+}
+
 function menu_backup_restore {
 	while true
 	do
@@ -1790,17 +1808,18 @@ function menu_backup_restore {
 		trap "rm -f $data" 0 1 2 5 15
 		dialog --backtitle $"Freedombone Control Panel" \
 			   --title $"Backup and Restore" \
-			   --radiolist $"Choose an operation:" 18 70 11 \
+			   --radiolist $"Choose an operation:" 19 70 12 \
 			   1 $"Backup data to USB drive" off \
 			   2 $"Restore GPG key from USB keydrive" off \
 			   3 $"Restore data from USB drive" off \
-			   4 $"Configure remote backups" off \
-			   5 $"Restore from remote backup" off \
-			   6 $"Backup GPG key to USB (master keydrive)" off \
-			   7 $"Backup GPG key to USB (fragment keydrive)" off \
-			   8 $"Format a USB drive (LUKS encrypted)" off \
-			   9 $"Remove backups from a USB drive" off \
-			   10 $"Back to main menu" on 2> $data
+			   4 $"Reinstall mariadb" off \
+			   5 $"Configure remote backups" off \
+			   6 $"Restore from remote backup" off \
+			   7 $"Backup GPG key to USB (master keydrive)" off \
+			   8 $"Backup GPG key to USB (fragment keydrive)" off \
+			   9 $"Format a USB drive (LUKS encrypted)" off \
+			   10 $"Remove backups from a USB drive" off \
+			   11 $"Back to main menu" on 2> $data
 		sel=$?
 		case $sel in
 			1) break;;
@@ -1810,13 +1829,14 @@ function menu_backup_restore {
 			1) backup_data;;
 			2) restore_gpg_key;;
 			3) restore_data;;
-			4) configure_remote_backups;;
-			5) restore_data_remote;;
-			6) create_keydrive_master;;
-			7) create_keydrive_fragment;;
-			8) format_drive;;
-			9) remove_backups;;
-			10) break;;
+			4) reinstall_mariadb;;
+			5) configure_remote_backups;;
+			6) restore_data_remote;;
+			7) create_keydrive_master;;
+			8) create_keydrive_fragment;;
+			9) format_drive;;
+			10) remove_backups;;
+			11) break;;
 		esac
 	done
 }

src/freedombone-utils-database

@@ -327,4 +327,11 @@ function drop_database {
 	mysqladmin -uroot -p"$MARIADB_PASSWORD" -f drop $database_name
 }
 
+function database_reinstall {
+	apt-get -y purge mariadb*
+	rm -rf /var/lib/mysql
+	rm -rf /etc/mysql
+	apt-get -y install mariadb-server
+}
+
 # NOTE: deliberately there is no "exit 0"