Re: [lcd4linux] exec() question

[Lars S. <st...@te...>]

Michael Reinelt wrote:
> Hi Lars,
>=20
>>Does anyone know if you can get the exec() to execute
>>once only instead of doing repeated executions?
>=20
> I'm afraid this is *not* possible at the moment. But this could be
> easily implemented by using a 'update' value (or whatever the attribute
> is called today :-) of 0 (zero).
>=20
> But why the heck would one want to execute things only once???

I'm working on a software RAID-1 solution with three S-ATA disks.
One of these disks will be used as backup, i.e push the button
(CF635), take out the disk, put another disk in, push another
button, and voil=E1, you have a complete (and bootable) backup
of your system on a separate disk, whilest the new disk is now
being resynced. All with a running system (hotswap, no reboot).

I'm new to lcd4linux since a couple of days back, and I just
have to say: great piece of software, well done! Just bought
myself a CF635 display, and with lcd4linux I got it up and
running in no time.

I checked the mailinglist and couldn't find any plugin for
/proc/mdstat, which I need in order to monitor the RAID.
So I guess I'll have to write a plugin for /proc/mdstat.
However, for prototyping I find the exec() function splendid.
With the help of the exec() function and a simple shell-script,
I have a running system where the CF635 display shows the
RAID status. I even took care of stopping the underlying processes
using a modified init.d script for start/stop of lcd4unix.
So, in all fairness, it works well for me at least.

I also got the CF635 keypad working allright, thanks to
Chris's patch for this the other week. However, I'm not
sure how to execute a command (once!) using the keypad.
Maybe there is another way that I don't know of?
If not, I guess I'll have to look in to the code.

Thank you for your comments.

R
/LarS