None of these work without the proper # of arguments so print usage

mkdir.c

@@ -29,6 +29,9 @@ main(int argc, char *argv[])
 		usage();
 	} ARGEND;
 
+	if (argc < 1)
+		usage();
+
 	for(; argc > 0; argc--, argv++) {
 		if(pflag) {
 			mkdirp(argv[0]);