#include <stdio.h> /* fprintf(3), stderr */
#include <stdlib.h>
#include <unistd.h> /* getopt(3) */

static int lines = 10; /* POSIX.1 */
static char *program_name = "head";

int main(int argc, char *argv[]){
	int c;
	extern char *optarg;
	extern int opterr, optind, optopt;

	if(argc > 0)
		program_name = argv[0];

	while((c = getopt(argc, argv, "n:")) != -1)
		switch(c){
		case 'n':
			break;
		default:
#ifdef IGIT /* parse -[digit] options */
#endif /* ifdef IGIT */
usage:			fprintf(stderr, "Usage: %s (-n [lines]) (file...)\n",
				program_name);
			return EX_USAGE;
		}