Command line arguments in Emacs

command-line-args
Variable: Args passed by shell to Emacs, as a list of strings.
Plist: variable-documentation
command-line-args-left
Variable: List of command-line args not yet processed.
Plist: variable-documentation
command-line-functions
Variable: List of functions to process unrecognized command-line arguments.
Plist: variable-documentation