[augeas-devel] Having problems with grub lens

[David Lutterkort]

On Fri, 2010-04-23 at 13:34 -0700, Aaron Grewell wrote:
> Hi all,
> I'm trying to use Augeas 0.7.0 to manipulate grub.conf.  Most modifications work as expected, but adding a kernel option with no parameter value does not.  Augtool gives an error or else produces invalid results.  I grabbed the lens from HEAD to see if the issue was resolved, but it doesn't appear to be.  Examples:
> 
> Default state:
> augtool> ls /files/etc/grub.conf/title[1]/kernel
> ro = (none)
> root = LABEL=/
> apm = power-off
> divider = 10
> 
> Set without a value:
> augtool> set /files/etc/grub.conf/title[1]/kernel/notsc
> Not enough arguments for set

What you want is the 'clear' command - it behaves like set, but sets the
value of the tree node to NULL. The separate 'clear' command is needed,
since the second argument to set can be any string.

So, if you do

        augtool> clear /files/etc/grub.conf/title[1]/kernel/notsc
        
you'll get 

        kernel /vmlinuz-2.6.18-128.el5 ro root=LABEL=/ apm=power-off divider=10 notsc

in your grub.conf.

David