From mboxrd@z Thu Jan  1 00:00:00 1970
Message-ID: <4bdece4cd73b46e7fe957da67fa215c6@plan9.bell-labs.com>
To: 9fans@9fans.net
Date: Thu, 18 Dec 2008 23:13:08 -0500
From: geoff@plan9.bell-labs.com
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Subject: Re: [9fans] 9pfuse and O_APPEND
Topicbox-Message-UUID: 6a32514e-ead4-11e9-9d60-3106f5b1d025

The places that DMAPPEND is used most commonly are log files and mail
boxes.  In both cases, I don't want the decision of whether to
truncate or append left to the whims of some program.  I want writes
to append, by god, and DMAPPEND on actual disk-based file servers such
as fossil and fs does that.  (Yes, a malicious program could perhaps
clear DMAPPEND and truncate, but the more likely cause of disaster in
a system without DMAPPEND is someone forgetting to set a hypothetical
`append mode' on a fid or equivalent.  You only have to slip up once
to ruin someone's day.)