uses of mmap

[David C. Miller]

In Jerome Freedman writes:
:  I have been looking at mmap [...]
: Now , If I want to mmap a file it looks as though I have to
: open the device on which the file resides to get the fd 
: mentioned in the man pages and somehow get the offset of
: the file I want to map - is this a correct interpretation

It's real close.  But you open the *file* you want to map, not
the device it resides on.

David