Re: Locking a file?

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Article #4752

#4752

From: Pierre Jelenc
Date: Thu, 18 Apr 1996 20:49

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Pierre Jelenc <rcpj@panix.com> writes:
> 
> Does that lock the EA's as well? I cannot find any documentation as to how
> SysPutEA() decides whether it has access to the file or not. 

And to follow up on myself, from the tests I've been able to perform it
seems that locking a file by opening it for write or read/write prevents
writing to the extended attributes.

How can one update data and extended attributes in such a way that the
file is protected from simultaneous write attempts by several processes?
If the file must be closed first, it can be grabbed by a competitor that
can clobber the EA's or prevent their update.

Pierre
-- 
Pierre Jelenc              Know what's weird? Day by day nothing seems to
rcpj@panix.com             change, but pretty soon everything is different.
pierre@nycbeer.org                                         Calvin & Hobbes 
                   http://www.columbia.edu/~pcj1/

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Path: arc1-ca.pugleaf.net!newsfeed.internetmci.com!panix!not-for-mail
From: rcpj@panix.com (Pierre Jelenc)
Newsgroups: comp.lang.rexx
Subject: Re: Locking a file?
Date: 18 Apr 1996 16:49:46 -0400
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