include/getopt.h File Reference

#include <unistd.h>

Include dependency graph for getopt.h:

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Data Structures
struct	option
	The option specifier structure for long options. More...
Defines
#define	_ABLE_CLIB_GETOPT_H   1
#define	no_argument   0
	long option has no argument
#define	required_argument   1
	long option has a required argument
#define	optional_argument   2
	long option has an optional argument
Functions
int	getopt_long (int argc, char *const *argv, const char *optstring, const struct option *longopts, int *longindex)
	Process command line options with support for GNU style long options.

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Define Documentation

#define _ABLE_CLIB_GETOPT_H   1

#define no_argument   0

long option has no argument

#define optional_argument   2

long option has an optional argument

#define required_argument   1

long option has a required argument

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Function Documentation

int getopt_long	(	int	argc,
		char *const *	argv,
		const char *	optstring,
		const struct option *	longopts,
		int *	longindex
	)

Process command line options with support for GNU style long options.

Process the passed string vector an element at a time serching for valid option switches. The short options are processed in a similar way to the getopt function. The long options (ones which begin with a double hypen) are processed acording to the array of long option specifiers.

Parameters:

	argc	The number of elements in the argument vector argv.
	argv	The argument vector.
	optstring	The short options string. This string is formatted the same as that for getopt. For long options only this must be an empty string not NULL.
	longopts	An array of option terminated by an option filled with zeros.
	longindex	Pointer to a variable set to the index of the long option relative to longopts. May be NULL to disable.