getopt.c

<B>Digital的Unix操作系统VAX 4.2源码</B>

#ifndef lint
static	char	*sccsid = "@(#)getopt.c	4.1	(Ultrix)	7/17/90";
#endif lint
/************************************************************************
 *									*
 *			Copyright (c) 1988 by				*
 *		Digital Equipment Corporation, Maynard, MA		*
 *			All rights reserved.				*
 *									*
 *   This software is furnished under a license and may be used and	*
 *   copied  only  in accordance with the terms of such license and	*
 *   with the  inclusion  of  the  above  copyright  notice.   This	*
 *   software  or  any  other copies thereof may not be provided or	*
 *   otherwise made available to any other person.  No title to and	*
 *   ownership of the software is hereby transferred.			*
 *									*
 *   This software is  derived  from  software  received  from  the	*
 *   University    of   California,   Berkeley,   and   from   Bell	*
 *   Laboratories.  Use, duplication, or disclosure is  subject  to	*
 *   restrictions  under  license  agreements  with  University  of	*
 *   California and with AT&T.						*
 *									*
 *   The information in this software is subject to change  without	*
 *   notice  and should not be construed as a commitment by Digital	*
 *   Equipment Corporation.						*
 *									*
 *   Digital assumes no responsibility for the use  or  reliability	*
 *   of its software on equipment which is not supplied by Digital.	*
 *									*
 ************************************************************************/
/************************************************************************
 *			Modification History				*
 * 001 Richard Hart, Feb. 9, 1988					*
 *     Copied from System V code:					*
 *			@(#)getopt.c	1.4				*
 *			3.0 SID #	1.1				*
 ************************************************************************/

#include	<stdio.h>
char	*strchr();

main(argc, argv)
int argc;
char **argv;
{
	extern	int optind;
	extern	char *optarg;
	register int	c;
	int	errflg = 0;
	char	tmpstr[4];
	char	outstr[5120];
	char	*goarg;

	if(argc < 2) {
		fputs("usage: getopt legal-args $*\n", stderr);
		exit(2);
	}

	goarg = argv[1];
	argv[1] = argv[0];
	argv++;
	argc--;

	while((c=getopt(argc, argv, goarg)) != EOF) {
		if(c=='?') {
			errflg++;
			continue;
		}

		tmpstr[0] = '-';
		tmpstr[1] = c;
		tmpstr[2] = ' ';
		tmpstr[3] = '\0';

		strcat(outstr, tmpstr);

		if(*(strchr(goarg, c)+1) == ':') {
			strcat(outstr, optarg);
			strcat(outstr, " ");
		}
	}

	if(errflg) {
		exit(2);
	}

	strcat(outstr, "-- ");
	while(optind < argc) {
		strcat(outstr, argv[optind++]);
		strcat(outstr, " ");
	}

	printf("%s\n", outstr);
	exit(0);
}