Date: Sun, 31 Jul 2005 18:39:29 -0400 From: Garrett Wollman <wollman@csail.mit.edu> To: Giorgos Keramidas <keramida@FreeBSD.ORG> Cc: freebsd-current@FreeBSD.ORG Subject: Re: mmap bug? Message-ID: <17133.21281.703540.383144@khavrinen.csail.mit.edu> In-Reply-To: <20050731201858.GC1052@gothmog.gr> References: <20050731141801.GA49300@gothmog.gr> <84dead7205073108564f71f1ab@mail.gmail.com> <20050731160853.GC49839@gothmog.gr> <84dead720507311115290f0140@mail.gmail.com> <20050731201858.GC1052@gothmog.gr>
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<<On Sun, 31 Jul 2005 23:18:58 +0300, Giorgos Keramidas <keramida@FreeBSD.ORG> said: > The bug seems to be elsewhere, namely to the fact that the filesystem > code never realizes the file has changed size after I use mmap() to map > a region beyond its current size and write past its current end. You should not expect it to do that. If you want to extend a file, use ftruncate() before mapping it. Anything written past the end of a file should be discarded on last close. -GAWollman
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