Remove unimplemented parameter w

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Fix broken shebang

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Add missing shebang

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Add parameter check and usage info

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>