- opt_complementary = "-1"; // at least one param; -n NUM
- // "+": stop at first non-option (procps 3.x only)
- opt = getopt32(argv, "+dtn:+", &period);
+ // "+": stop at first non-option (procps 3.x only); -n NUM
+ // at least one param
+ opt = getopt32(argv, "^+" "dtn:" "\0" "-1", &period_str);