Returns invisibly a named list of the options prefixed
"startup.session.":
startup.session.startdir
(character) the working directory when
the startup was first loaded. If startup::startup() is called
at the very beginning of the .Rprofile file, this is also the
directory that the current R session was launched from.
startup.session.starttime
(POSIXct) the time when the
startup was first loaded.
startup.session.id
(character) a unique ID for the current R
session.
startup.session.dumpto
(character) a session-specific name that
can be used for argument dumpto of dump.frames()
(also for dumping to file).
Arguments
action
If "update" or "overwrite", R options
"startup.session.*" are set. If "update", then such options that are
not already set are updated. If "erase", any existing
"startup.session.*" options are removed.