#4240 [FVT]rpower CN returns "Error: Unsupported power directive ''" on kvm virtual machine but it should give usage mes

[ting ting li]

slesmn:~ # lsxcatd -v
Version 2.8.5 (git commit 0d4888af5a7a96ed521cb0e32e2c918a9d13d7cc, built Tue Jul 29 02:22:47 EDT 2014)

slesmn:~ # rpower slescn
slescn: Error: Unsupported power directive ''
slesmn:~ # echo $?
1

[Guang Cheng Li]

My opinion is that this message is quite clear, it says the '' is not a supported power directive, the user should be able to know what is going wrong...