option

Syntax

  #include <getopt.h>
  
  struct option
  {
     const char   *name;
     int           has_arg;
     int          *flag;
     int           val;
  };
  

Fields

name

Points to the name of the option which is a string.

has_arg

Specifies whether the option takes an argument with one of the following flags:

Flag	Value	Description
no_argument	0	The option does not take an argument.
required_argument	1	The option requires an argument.
optional_argument	2	The option has an optional argument.

flag

Points to the flag name of the option argument or to a NULL pointer.

val

Specifies to the value of the argument.