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From: guy%gorodish@Sun.COM (Guy Harris)
Newsgroups: comp.unix.wizards
Subject: Re: BSD to SysV
Message-ID: <32574@sun.uucp>
Date: Sun, 1-Nov-87 17:05:05 EST
Article-I.D.: sun.32574
Posted: Sun Nov  1 17:05:05 1987
Date-Received: Thu, 5-Nov-87 20:55:48 EST
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> This feature does not seem to be documented for SVR2 (or SVR2V2),
> however, the supporting kernel code does appear to be there. Is this
> another instance of AT&T forgetting to document a feature, or am I not
> looking in the right place, or is there another explanation?

I remember looking at this several years ago and concluding that S5R2 *almost*
implemented synchronous I/O for user mode, but that there was one small piece
missing.  The FSYNC bit was, at the time, used internally for some operations
to keep the file system as self-consistent as possible at all times.  I think
they finished making it usable by applications in some later release (probably
S5R3), and documented it then.
	Guy Harris
	{ihnp4, decvax, seismo, decwrl, ...}!sun!guy
	guy@sun.com