Re: different processes using same file object

[krushnaal pai <krisonearth@xxxxxxxxx>]

even if process A does recv the file descriptions thru sockets how will it use the file object of process B?

On Tue, Sep 29, 2009 at 2:58 PM, Luciano Rocha <luciano@xxxxxxxxxxx> wrote:

On Tue, Sep 29, 2009 at 02:20:00PM +0530, krushnaal pai wrote:
> i have 2 completely different processes A and B (they do not have any
> relationship)
>
> suppose A opens a file with file descriptor 4 and
> B opens another file with file descriptor 5
>
> can process A use the fd 5 (i.e using the file object of processs B) by any
> means..

You can pass file descriptions using unix sockets. Check "man 7 unix"
for instructions.

> if suppose i let the fd 4 of process A to point to the file object of
> process B(fd 5)
>
> will it work?

No. They will not share the file descriptor (offsets, flags, mode etc.
will not be shared).


--
Luciano Rocha <luciano@xxxxxxxxxxx>
Eurotux Informática, S.A. <http://www.eurotux.com/>