Re: Memory copy

[Seth Arnold <sarnold@wirex.com>]

On Mon, Mar 10, 2003 at 12:45:40PM +0000, Miguel wrote:
> this is not a real question about kernel programming but about a user
> process... How can I just copy a chunk of memory from a process to
> another? Is there a simple memcpy-like call or is it necessary to use
> another method, like shared memory, or pipes?

mmap(2), sysv shared memory, (does linux do posix shared memory?),
pipes (named and unnamed), sockets (unix domain or tcp/ip for easy
distributability)..

All sorts of cool options. :)

I'd expect mmap(2) and sysv shm to be the most portable when you want to
share a lot of memory, and unix domain sockets or tcp/ip sockets to be
most useful when you want to share a stream of bytes, rather than shared
random-access modification of bytes..

W. Richard Stevens has written a book dedicated to interprocess
communication under Unix systems. Recommended reading, as is everything
he wrote.

I hope this helps

-- 
"Nothing says, 'Superpower' like bombing a country that is poor and
hungry." -- Ken Brush

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