[R-SIG-Mac] Start R with --save?

[Duncan Murdoch]

I am not sure if the command line arg --save is supposed to be supported 
by R.app, but it doesn't
work.  When I start R from a Terminal command line with command line 
option  --save:

/Applications/R.app/Contents/MacOS/R --save

instead of a silent save, I get the Unix-style prompt in the console:

Save workspace image? [y/n/c]:

If this isn't the way to specify that I want an automatic save, what is?

Duncan Murdoch