- if (d != c) {
- if (optstring[0] != ':' && opterr) {
- write(2, argv[0], strlen(argv[0]));
- write(2, ": illegal option: ", 18);
- write(2, optchar, k);
- write(2, "\n", 1);
- }
+ i = 0;
+ d = 0;
+ do {
+ l = mbtowc(&d, optstring+i, MB_LEN_MAX);
+ if (l>0) i+=l; else i++;
+ } while (l && d != c);
+
+ if (d != c || c == ':') {
+ optopt = c;
+ if (optstring[0] != ':' && opterr)
+ __getopt_msg(argv[0], ": unrecognized option: ", optchar, k);