option

option.c

#include<stdio.h>
#include <getopt.h>
int flag;
struct option long_options[] = {
		{ "deamon", no_argument, NULL, 'D' },
		{ "loglevel", required_argument, NULL, 'L' },
		{ "ip", required_argument,&flag, 1 },
		{ "port", required_argument, &flag, 2 },

};

int main(int argc, char**argv) {
	int option_index = 0;

	while (1) {
		int c = getopt_long(argc, argv, "DL:", long_options, &option_index);
		if (c == -1) {
			break;
		}
		switch (c) {
		case 'D':
			printf("D\n");
			break;
		case 'L':
			printf("L %s\n", optarg);
			break;
		case 0:
			switch (flag) {
			case 1:
				printf("flag 1 %s\n", optarg);
				break;
			case 2:
				printf("flag 2 %s\n", optarg);
				break;

			}

		}
	}
	return 0;
}

./a.out -D -L 8 --ip ljljk --port 23 --port 46