static int getopt(int argc, char *argv[], char *opts) { static int sp = 1; int c; char *cp; if (sp == 1) if (optind >= argc || argv[optind][0] != '-' || argv[optind][1] == '\0') return EOF; else if (!strcmp(argv[optind], "--")) { optind++; return EOF; } optopt = c = argv[optind][sp]; if (c == ':' || (cp = strchr(opts, c)) == NULL) { fprintf(stderr, ": illegal option -- %c\n", c); if (argv[optind][++sp] == '\0') { optind++; sp = 1; } return '?'; } if (*++cp == ':') { if (argv[optind][sp+1] != '\0') optarg = &argv[optind++][sp+1]; else if(++optind >= argc) { fprintf(stderr, ": option requires an argument -- %c\n", c); sp = 1; return '?'; } else optarg = argv[optind++]; sp = 1; } else { if (argv[optind][++sp] == '\0') { sp = 1; optind++; } optarg = NULL; } return c; }