getopt(1) on Linux
The text a46439698792, as Debian 11 (Bullseye) shipped it.
parse command options (enhanced)
Flags it lists
-
--alternative -
--help -
--longoptions -
--name -
--options -
--quiet -
--quiet-output -
--shell -
--test -
--unquoted -
--version -
-Q -
-T -
-V -
-a -
-h -
-l -
-n -
-o -
-q -
-s -
-u