[Eomer of the Rohirrim]

I think Saruman knew deep down that, when Frodo returned to the Shire, his Doom was at hand. He makes mention of Frodo tarrying on the road home and thus he is able to do considerable damage to Frodo's home. The way he says this implies that he didn't want to hang around the Shire when the Heroes came back, and his meek surrender of Bag End confirms this.

The attempted murder of Frodo suggests that he wanted to die.