#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

int target_fd;

parse_target_fd_opt(argc, argv)
	char **argv;
{
	extern char *optarg;
	int c;

	while ((c = getopt(argc, argv, "C:")) != EOF) {
		switch (c) {
		case 'C':
			target_fd = atoi(optarg);
			continue;
		case '?':
		default:
			/* error msg already printed */
			exit(1);
		}
	}
	if (!target_fd) {
		fprintf(stderr, "error: target fd must be given with -C\n");
		exit(1);
	}
	return(0);
}