In article <000201c0c0a4$eb5c7b10$321ea8c0@saturn> you wrote:
>    rename("/usr/hybrid/cfg/data","/usr/mytemp/data1"); /*for process 1*/
>  rename("/usr/mytemp/data1","/usr/test");/* for process 2*/

Rename syscall is expected to be atomic on unixoid systems. And I dont know of
a case where a problem is, besides if you use some network file system, where
nobody can realy gurantee anything (well kidding, but it is harder than on a
local one).

The second rename may see the result of the first rename or the original state
before the first rename. It will not see any half-state or locked nodes.

Greetings
Bernd
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