record locking in C-tree on bsd unix

[Deepak G Patil]

Does any one know how to lock records in C-tree on bsd unix ?

to my knowledge to lock records C-tree uses system call,
and bsd unix doesn't support any system call to lock a record in a file,

has any one implemented record locking under bsd unix? any pointers
will be highly appreciated.

thanks in advance.
Deepak