Open files with the default handler
see also :
add an example, a script, a trick and tips
opens files with the default application that is registered
to handle files of this type.
this information from the shared-mime-info
database. The default handler is stored per-user, in
options are understood:
Prints a short help text and
On success 0 is returned, a non-zero failure code otherwise.
gvfs open [option ]