Poul-Henning Kamp phk at phk.freebsd.dk
Sun Apr 13 07:05:54 UTC 2008

In message <20080412132457.W43186 at desktop>, Jeff Roberson writes:

>It's worth discussing what posix actually guarantees for f_offset as well 
>as what other operating systems do.

I think DWIM is quite easily defined here:  concurrent access only
makes sense with pwrite[v](2)/pread[v](2).

The non p-prefix versions should always be serialized, because there
is know way of knowing where they read/write if you don't.

Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.

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