Reading from an existing entry in /proc

From: Johnny Choque (johnnychoque_at_hotmail.com)
Date: 01/30/04 

Date: Fri, 30 Jan 2004 11:13:29 +0100

I can see how to create and read/write the proc file system by looking
at examples in the kernel source tree. However I do not see how to read
from an existing entry from my kernel module. I see plenty of examples of
create, read, and write, bit no "open". How can I open for read an
existing entry without having to create first???

Thanks and regards

Johnny