Reference for unit 'getopts': Constants

Constant	Description
EndOfOptions	Returned by getopt ,getlongopts to indicate that there are no more options.
No_Argument	Specifies that a long option does not take an argument.
Optional_Argument	Specifies that a long option optionally takes an argument.
OptSpecifier	Character indicating an option on the command-line.
Required_Argument	Specifies that a long option needs an argument.