[Busybox1.9.1] Start-stop-daemon has some problems
 

I met a busybox problem. I am using busybox 1.9.1. I use cross compiler for mips to compile busybox. Then I load the bin images to board. Then I use start-stop-daemon command. But it show the option is not right. Then I type start-stop-daemon --help command. It show the command is used to change user id. It become su command. It is so strange. Can you help me? Thanks.