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#include        <stdio.h>

#include        <string.h>

#define EPR                 fprintf(stderr,

#define ERR(str, chr)       if(opterr){EPR "%s%c\n", str, chr);}

int     opterr = 1;

int     optind = 1;

int     optopt;

char    *optarg;

int

getopt (int argc, char *const argv[], const char *opts)

{

        static int sp = 1;

        int c;

        char *cp;

        if (sp == 1)

                if (optind >= argc ||

                   argv[optind][0] != '-' || argv[optind][1] == '\0')

                        return -1;

                else if (strcmp(argv[optind], "--") == 0) {

                        optind++;

                        return -1;

                }

        optopt = c = argv[optind][sp];

        if (c == ':' || (cp=strchr(opts, c)) == 0) {

                ERR (": illegal option -- ", 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) {

                        ERR (": option requires an argument -- ", c);

                        sp = 1;

                        return '?';

                } else

                        optarg = argv[optind++];

                sp = 1;

        } else {

                if (argv[optind][++sp] == '\0') {

                        sp = 1;

                        optind++;

                }

                optarg = 0;

        }

        return c;

}