Subversion Repositories planix.SVN

#include        <stdlib.h>
#include        <string.h>
#include        <stdio.h>
#define ERR(str, chr)       if(opterr){fprintf(stderr, "%s%s%c\n", argv[0], str, chr);}
int     opterr = 1;
int     optind = 1;
int     optopt;
char    *optarg;

int
getopt (int argc, char **argv, char *opts)
{
        static int sp = 1;
        register c;
        register char *cp;

        if (sp == 1)
                if (optind >= argc ||
                   argv[optind][0] != '-' || argv[optind][1] == '\0')
                        return EOF;
                else if (strcmp(argv[optind], "--") == 0) {
                        optind++;
                        return EOF;
                }
        optopt = c = argv[optind][sp];
        if (c == ':' || (cp=strchr(opts, c)) == NULL) {
                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 = NULL;
        }
        return c;
}