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Don't require a list of object file for the -d, -m, -q and -r options
since neither Solaris nor GNU ar require this.  Personally I'd
rather change the world to use the BSD behavior but that is unlikely
and the differing behavior causes problems with libtool and automake.
deraadt@ OK

/*	$OpenBSD: ar.c,v 1.8 2002/12/11 22:01:13 millert Exp $	*/
/*	$NetBSD: ar.c,v 1.5 1995/03/26 03:27:44 glass Exp $	*/

/*-
 * Copyright (c) 1990, 1993, 1994
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Hugh Smith at The University of Guelph.
 *
 * 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.
 */

#ifndef lint
static char copyright[] =
"@(#) Copyright (c) 1990, 1993, 1994\n\
	The Regents of the University of California.  All rights reserved.\n";
#endif /* not lint */

#ifndef lint
#if 0
static char sccsid[] = "@(#)ar.c	8.3 (Berkeley) 4/2/94";
#else
static char rcsid[] = "$OpenBSD: ar.c,v 1.8 2002/12/11 22:01:13 millert Exp $";
#endif
#endif /* not lint */

#include <sys/param.h>

#include <ar.h>
#include <dirent.h>
#include <err.h>
#include <paths.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include "archive.h"
#include "extern.h"

CHDR chdr;
u_int options;
char *archive, *envtmp, *posarg, *posname;
static void badoptions(char *);
static void usage(void);

/*
 * main --
 *	main basically uses getopt to parse options and calls the appropriate
 *	functions.  Some hacks that let us be backward compatible with 4.3 ar
 *	option parsing and sanity checking.
 */
int
main(argc, argv)
	int argc;
	char **argv;
{
	int c;
	char *p;
	int (*fcall)(char **);

	if (argc < 3)
		usage();

	/*
	 * Historic versions didn't require a '-' in front of the options.
	 * Fix it, if necessary.
	*/
	if (*argv[1] != '-') {
		if (!(p = malloc((u_int)(strlen(argv[1]) + 2))))
			err(1, NULL);
		*p = '-';
		(void)strcpy(p + 1, argv[1]);	/* ok */
		argv[1] = p;
	}

	while ((c = getopt(argc, argv, "abcCdilmopqrTtuvx")) != -1) {
		switch(c) {
		case 'a':
			options |= AR_A;
			break;
		case 'b':
		case 'i':
			options |= AR_B;
			break;
		case 'c':
			options |= AR_C;
			break;
		case 'C':
			options |= AR_CC;
			break;
		case 'd':
			options |= AR_D;
			fcall = delete;
			break;
		case 'l':		/* not documented, compatibility only */
			envtmp = ".";
			break;
		case 'm':
			options |= AR_M;
			fcall = move;
			break;
		case 'o':
			options |= AR_O;
			break;
		case 'p':
			options |= AR_P;
			fcall = print;
			break;
		case 'q':
			options |= AR_Q;
			fcall = append;
			break;
		case 'r':
			options |= AR_R;
			fcall = replace;
			break;
		case 'T':
			options |= AR_TR;
			break;
		case 't':
			options |= AR_T;
			fcall = contents;
			break;
		case 'u':
			options |= AR_U;
			break;
		case 'v':
			options |= AR_V;
			break;
		case 'x':
			options |= AR_X;
			fcall = extract;
			break;
		default:
			usage();
		}
	}

	argv += optind;
	argc -= optind;

	/* One of -dmpqrtx required. */
	if (!(options & (AR_D|AR_M|AR_P|AR_Q|AR_R|AR_T|AR_X))) {
		warnx("one of options -dmpqrtx is required");
		usage();
	}
	/* Only one of -a and -bi allowed. */
	if (options & AR_A && options & AR_B) {
		warnx("only one of -a and -[bi] options allowed");
		usage();
	}
	/* -ab require a position argument. */
	if (options & (AR_A|AR_B)) {
		if (!(posarg = *argv++)) {
			warnx("no position operand specified");
			usage();
		}
		posname = rname(posarg);
	}
	/* -d only valid with -Tv. */
	if (options & AR_D && options & ~(AR_D|AR_TR|AR_V))
		badoptions("-d");
	/* -m only valid with -abiTv. */
	if (options & AR_M && options & ~(AR_A|AR_B|AR_M|AR_TR|AR_V))
		badoptions("-m");
	/* -p only valid with -Tv. */
	if (options & AR_P && options & ~(AR_P|AR_TR|AR_V))
		badoptions("-p");
	/* -q only valid with -cTv. */
	if (options & AR_Q && options & ~(AR_C|AR_Q|AR_TR|AR_V))
		badoptions("-q");
	/* -r only valid with -abcuTv. */
	if (options & AR_R && options & ~(AR_A|AR_B|AR_C|AR_R|AR_U|AR_TR|AR_V))
		badoptions("-r");
	/* -t only valid with -Tv. */
	if (options & AR_T && options & ~(AR_T|AR_TR|AR_V))
		badoptions("-t");
	/* -x only valid with -CouTv. */
	if (options & AR_X && options & ~(AR_O|AR_U|AR_TR|AR_V|AR_X|AR_CC))
		badoptions("-x");

	if (!(archive = *argv++)) {
		warnx("no archive specified");
		usage();
	}

	exit((*fcall)(argv));
}

static void
badoptions(arg)
	char *arg;
{

	warnx("illegal option combination for %s", arg);
	usage();
}

static void
usage()
{

	(void)fprintf(stderr, "usage:  ar -d [-Tv] archive file ...\n");
	(void)fprintf(stderr, "\tar -m [-Tv] archive file ...\n");
	(void)fprintf(stderr, "\tar -m [-abiTv] position archive file ...\n");
	(void)fprintf(stderr, "\tar -p [-Tv] archive [file ...]\n");
	(void)fprintf(stderr, "\tar -q [-cTv] archive file ...\n");
	(void)fprintf(stderr, "\tar -r [-cuTv] archive file ...\n");
	(void)fprintf(stderr, "\tar -r [-abciuTv] position archive file ...\n");
	(void)fprintf(stderr, "\tar -t [-Tv] archive [file ...]\n");
	(void)fprintf(stderr, "\tar -x [-CouTv] archive [file ...]\n");
	exit(1);
}