Date: Sat, 08 Jul 2006 09:05:51 -0700 From: Sam Leffler <sam@errno.com> To: Craig Rodrigues <rodrigc@crodrigues.org> Cc: freebsd-current@freebsd.org, freebsd-arch@freebsd.org Subject: Re: [RFC] mount can figure out fstype automatically Message-ID: <44AFD7DF.8090002@errno.com> In-Reply-To: <20060708152801.GA3671@crodrigues.org> References: <20060708152801.GA3671@crodrigues.org>
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Craig Rodrigues wrote: > Hi, > > One of the pet peeves I have with FreeBSD is that > if I have a device with a local filesystem that I want to mount, > I need to explicitly know what type of filesystem is on the > device in order to mount it from the command-line. > > For example, > > mount -t cd9660 > mount -t udf > mount -t ext2fs > mount -t msdosfs > > Where this is particularly annoying is if I have multiple > USB thumb drives with different filesystems on them. > > What I usually end up doing is something like: > file - < /dev/ad0s4 > > to figure out the filesystem type, and then mount -t [whatever] to mount it. > > What I would like to do is: > > mount /dev/ad0s4 /mnt > > and if I do not specify a filesystem type with -t, the mount > program should "magically" figure out how to mount the disk. > This is closer to how the mount program behaves on Linux for example. > > I've come up with a patch that does this, by interpreting > an fstype of "" as: > - starting with "ufs", iterate over all the local filesystem types > that we know about, and try to mount the device > > Comments? <...patch deleted...> Linux has -t auto; haven't looked at how it works. It appears you just try a series of fs types; can't you read the device to infer the filesystem? Sam
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