21 	char *optarg;	/* argument associated with option */
23 	char *place;	/* option letter processing */
41 struct option {  struct
42 	/* name of long option */
46 	 * whether option takes an argument  argument
49 	/* if not NULL, set *flag to val when option found */  argument
72  * @param[in] options	   String containing the legitimate option characters.  argument
76  *			   which is set to the index of the long option relative
79  * @return		If an option was successfully found, function returns
80  *			the option character.
83 		const char *options, const struct option *long_options,
90  * but '-' as well as "--" can indicate a long option. If an option that starts
91  * with '-' (not "--") doesn't match a long option, but does match a short
92  * option, it is parsed as a short option instead.
99  * @param[in] options	   String containing the legitimate option characters.
101  *			   @a struct option.
103  *			   which is set to the index of the long option relative
106  * @return		If an option was successfully found, function returns
107  *			the option character.
110 		     const char *options, const struct option *long_options,