/* * Parse the command line and return option flags and arguments */#include <stdio.h>#include "config.h"int optind = 1;char *optarg;intgetopt(argc, argv, opts)int argc;char *argv[];char *opts;{	static int sp = 1;	int c, strcmp();	char *cp, *strchr();	if (sp == 1) {		if (optind >= argc || argv[optind][0] != '-' || argv[optind][1] == '\0')			return(EOF);		else if (strcmp(argv[optind], "--") == 0) {			optind++;			return(EOF);		}	}	c = argv[optind][sp];	if (c == ':' || (cp=strchr(opts, c)) == NULL) {		fprintf(stderr, "%s: illegal option \"%c\"\n", argv[0], 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, "%s: option \"%c\" requires an argument\n", argv[0], c);			sp = 1;			return('?');		} else			optarg = argv[optind++];		sp = 1;	} else {		if (argv[optind][++sp] == '\0') {			sp = 1;			optind++;		}		optarg = NULL;	}	return(c);}