HI friends ,

I was assigned to enhance tool in unix solaris...the tool is totaly developed on shell and perl scripts...

The tool is used to change control files....The users are of certain group..
due to many users some people are changing these control files directly by using editors ....they are not using tool to change control files.

In the tool it has feature that it will not allow multiple user to write at a time.
But other user can change by using editors ...So we need to stop this...

Please help me in this regard....

I thought file locking...but dont know how to implement...