/* * Copyright (c) 1987, 1993, 1994 *	The Regents of the University of California.  All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright *    notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright *    notice, this list of conditions and the following disclaimer in the *    documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software *    must display the following acknowledgement: *	This product includes software developed by the University of *	California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors *    may be used to endorse or promote products derived from this software *    without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */#if defined(LIBC_SCCS) && !defined(lint)static char sccsid[] = "@(#)getopt.c	8.3 (Berkeley) 4/27/95";#endif /* LIBC_SCCS and not lint */#include <stdio.h>#include <stdlib.h>#include <string.h>int	opterr = 1,		/* if error message should be printed */	optind = 1,		/* index into parent argv vector */	optopt,			/* character checked for validity */	optreset;		/* reset getopt */char	*optarg;		/* argument associated with option */#define	BADCH	(int)'?'#define	BADARG	(int)':'#define	EMSG	""/* * getopt -- *	Parse argc/argv argument vector. */intgetopt(nargc, nargv, ostr)	int nargc;	char * const *nargv;	const char *ostr;{	extern char *program_name;	static char *place = EMSG;		/* option letter processing */	char *oli;				/* option letter list index */	if (optreset || !*place) {		/* update scanning pointer */		optreset = 0;		if (optind >= nargc || *(place = nargv[optind]) != '-') {			place = EMSG;			return (-1);		}		if (place[1] && *++place == '-') {	/* found "--" */			++optind;			place = EMSG;			return (-1);		}	}					/* option letter okay? */	if ((optopt = (int)*place++) == (int)':' ||	    !(oli = strchr(ostr, optopt))) {		/*		 * if the user didn't specify '-' as an option,		 * assume it means -1.		 */		if (optopt == (int)'-')			return (-1);		if (!*place)			++optind;		if (opterr && *ostr != ':')			(void)fprintf(stderr,			    "%s: illegal option -- %c\n", program_name, optopt);		return (BADCH);	}	if (*++oli != ':') {			/* don't need argument */		optarg = NULL;		if (!*place)			++optind;	}	else {					/* need an argument */		if (*place)			/* no white space */			optarg = place;		else if (nargc <= ++optind) {	/* no arg */			place = EMSG;			if (*ostr == ':')				return (BADARG);			if (opterr)				(void)fprintf(stderr,				    "%s: option requires an argument -- %c\n",				    program_name, optopt);			return (BADCH);		}	 	else				/* white space */			optarg = nargv[optind];		place = EMSG;		++optind;	}	return (optopt);			/* dump back option letter */}