Subject RE: [firebird-support] Putting Database In Single User Mode
Author Alan McDonald
> I Developing C/S Application Using D5 -> IBO -> FB 1.5x (Suse Linux)
> Within the application I have developed Routines Using IBX Admin To
> Backup and Restore. Now Adding Some Application Related Processes
> which need to force a Single User Mode for some small amount of time
> and after that users can reconnect

you need to read in the docs about database shutdown.
You may also decide to use events to drive the users to disconnect..