[ILUG] Serial Port Problem

[Vinayak Risbud]

Hi Friends,
    How to lock a serial Port ?  I have used the following procedure
to lock a serial port.
   1. set group-execute bit off
   2. group-ID bit on
    This reflectes a Mandatory locking.  Then I am using
fcntl function with appropricate parameters to lock the port

But the problem is ,  even after this procedure I am not able
to give an exclusive access to Serial Port.  Utilities like
minicom 'open, write and read' the Serial port which is locked.

If once a port is opened and locked,  then all successive
opens to that port must fail, until the port is close/unlocked.


How can I do it ?

Thanks in advance

Vinayak





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