/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */

/*
 * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#include <sys/types.h>
#include "sharemgr.h"
#include <stdlib.h>
#include <stdio.h>
#include <string.h>

/*
 * Utility functions shared by sharemgr and sharectl.
 */

/*
 * add_opt(optlist, optarg, security?)
 *	Add a new parsed option to the option list provided.
 *	If the option is a security option, only add if we are
 *	processing security options.
 */
int
add_opt(struct options **optlistp, char *optarg, int unset)
{
	struct options *newopt, *tmp, *optlist;
	char *optname;
	char *optvalue;

	optlist = *optlistp;
	newopt = (struct options *)malloc(sizeof (struct options));
	if (newopt == NULL)
		return (OPT_ADD_MEMORY);

	/* extract property/value pair */
	optname = optarg;
	if (!unset) {
		optvalue = strchr(optname, '=');
		if (optvalue == NULL) {
			free(newopt);
			return (OPT_ADD_SYNTAX);
		}
		*optvalue++ = '\0'; /* separate the halves */
	} else {
		optvalue = NULL;
	}

	newopt->optname = optname;
	newopt->optvalue = optvalue;
	newopt->next = NULL;
	if (optlist == NULL) {
		optlist = newopt;
	} else {
		for (tmp = optlist; tmp->next != NULL;
		    tmp = tmp->next) {
			/*
			 * Check to see if this is a duplicate
			 * value. We want to replace the first
			 * instance with the second.
			 */
			if (strcmp(tmp->optname, optname) == 0) {
				tmp->optvalue = optvalue;
				free(newopt);
				goto done;
			}
		}
		tmp->next = newopt;
	}
done:
	*optlistp = optlist;
	return (OPT_ADD_OK);
}