file locking on mountsystem

System

I need to lock a file from a perl script to prevent concurrent
access.

use Fcntl ':flock';
"(flock(FILE,LOCK_EX))";

returns always TRUE nor matter if I try locking this file
from a second script or not. Is flock not working
in the IW file system? Does anybody knows another
method to achive that?

Thanks for help!

sajiddc

Not sure but shouldn't the file get automatically locked if you open it for write/append?