Are write() calls guaranteed atomic?

[dnelson at allantgroup.com (Dan Nelson)]

In the last episode (Jun 02), Matthew Hagerty said:
> Thanks for the info, very helpful!  What reference did you get that
> from?  I searched high and low to find a definitive answer (like the
> one above) before posting.

The Open Group has their Single Unix Specification available online,
which is technically identical to IEEE Std 1003.1. 
http://www.unix.org/single_unix_specification/

> As for the clients, no, I don't have control over them.  They are web
> server child processes, Apache usually.  I considered using a socket, but
> I must have missed something since I didn't realize you could have a local
> socket that looks and smells like a file to external processes?  Based on
> your post, can I assume that I can create a socket that can be accessed
> using open() and write() by external processes?
> 
> On my way to RTFM... man socket (again...)

Take a look at syslogd; it creates a unix domain socket at
/var/run/log.

-- 
	Dan Nelson
	dnelson_(_at_)_allantgroup_(_dot_)_com