Mailinglist Archive: opensuse-factory (396 mails)

[Greg Freemyer <greg.freemyer@xxxxxxxxx>]

On Sun, Jan 16, 2011 at 4:58 PM, Mark Lord <mlord@xxxxxxxxx> wrote:
> On 11-01-16 03:04 PM, Greg Freemyer wrote:
> > cc:  Adding opensuse-factory
> >
> > On Fri, Jan 14, 2011 at 10:26 PM, Mark Lord<mlord@xxxxxxxxx>  wrote:
> > > On 11-01-12 12:32 PM, Greg Freemyer wrote:
> > > > Mark,
> > > >
> > > > I just got a problem report about wiper.sh needing /usr/sbin/rdev.
>
> ..
> > If you need to depend on it, maybe you need to add the above logic to
> > hdparm (or create a small standalone utility inside your package)?
>
> Thanks.
>
> How does this look to you for a bash rdev equivalent:
>
>    ## Try and determine the device name associated with the root filesystem.
>    ## This is nearly impossible to do in any perfect fashion.
>    ##
>    ## do_rdev *usually* works, but on some distros it may only find
> "/dev/root",
>    ## and "/dev/root" is not usually a real device.  We leave it like that
> for now,
>    ## because that's the pattern such systems also use in /proc/mounts.
>    ## Later, at time of use, we'll try harder to find the real rootdev.
>    ##
>    ## Redhat/Fedora no longer have an rdev command.  Silly them.
>    ## So we now implement it internally, below.
>    ##
>    STAT=/usr/bin/stat
>    FIND=/usr/bin/find
>    function match_rdev() {
>            rdev=""
>            rdevno="$1"
>            while read bdev ; do
>                    if [ "$rdev" = "" -o "$bdev" != "/dev/root" ]; then
>                            devno=$($STAT -c "0x%t%02T" "$bdev")
>                            [ "$devno" = "$rdevno" ] && rdev="$bdev"
>                    fi
>            done
>            echo -n "$rdev"
>    }
>    rootdev=$($FIND /dev/ -type b 2>/dev/null | match_rdev $($STAT -c "0x%D"
> '/'))
>    [ $verbose -gt 0 ] && echo "rootdev=$rootdev"
>
> That's what I'm intending to replace rdev with in wiper.sh v3.3.
> But I don't have any installs here that use "/dev/root" to re-test with.
> Gotta hunt around some more, I guess..

Mark,

I'm not familiar with /dev/root.

On my opensuse 11.3 machine, its a symlink to /dev/sda5.

I ran your script and it echos "rootdev=/dev/sda5".

My fstab has:
LABEL=root           /                    ext3
acl,relatime,user_xattr        1 1


I could change that to have /dev/root in the first column and reboot
if you think it a useful test for you, but I suspect you need
something booting from a LVM setup for /dev/root to be a meaningful
problem?

Greg
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