if you want to do it properly, use dbus libraries

http://wiki.maemo.org/Documentation/...per_Guide/DBus

this will work from the command line, but you should figure out which part is which and just send it directly.

/usr/bin/dbus-send --system --type=signal /com/nokia/mce/signal
com.nokia.mce.signal.sig_device_mode_ind string:"flight"