Detecting free disk space by percentage?

[Hugo Gayosso]

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I am aware of:

 disks:

    /filesystem freespace=size-limit define=class-list(,:.)


But I would like to check if I have 20% of my disk free instead of
761044 kbytes, because when I add more space to that partition I don't
want to recalculate how many bytes are 20% of the new assigned space.

The other option would be to run a shell script that gives me that
information (actually I am thinking on using check_disk from
Netsaint), but maybe this is an undocumented feature of cfengine :-),
so I decided to ask first.


Greetings,
- -- 
Hugo Gayosso
Support the Free Software Movement!
GNU Project <http://www.gnu.org>

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