From: John Dennis <jdennis@redhat.com>
To: James Antill <james.antill@redhat.com>
Cc: linux-audit@redhat.com, Abhishek Gupta <abhikiki@gmail.com>
Subject: Re: difficulty with TYPE
Date: Tue, 15 Jan 2008 08:58:20 -0500 [thread overview]
Message-ID: <478CBBFC.8090303@redhat.com> (raw)
In-Reply-To: <1200404039.30787.4.camel@code.and.org>
James Antill wrote:
> The second iovec above can't just be MAX_AUDIT_MESSAGE_LENGTH, or if
> there are two messages you'll read some/all of the next one(s). You
> either need to read the header first and then use hdr.size, or separate
> the IO from the parsing.
> Also you can't just check for readv() as above, you need to check that
> you've read the amount of data you want, and if you didn't get it all
> yet then loop.
This is why we provide libraries to do things like this, it can be
tricky to get right. The feed() interface to auparse consumes arbitrary
amounts of data (perfect for use in select/recv calls) and then calls
back with audit events as they are recognized in the input stream you
fed it.
--
John Dennis <jdennis@redhat.com>
next prev parent reply other threads:[~2008-01-15 13:58 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-01-15 7:14 difficulty with TYPE Abhishek Gupta
2008-01-15 13:33 ` James Antill
2008-01-15 13:58 ` John Dennis [this message]
2008-01-15 14:20 ` James Antill
2008-01-15 14:41 ` John Dennis
2008-01-15 14:59 ` Steve Grubb
2008-01-15 14:29 ` Steve Grubb
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