testcase.c

#include <stdio.h>

int main(int argc, char **argv)
{
	int use_icmp;
	switch (argv[0][0]) {
		case 'I':
			use_icmp = 1;
			break;
	}

	if (use_icmp) {
		printf("YES: %i %i\n", use_icmp, argc);
	} else {
		printf("NO \\o/\n");
	}

	return 0;
}