/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (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 (c) 1997, by Sun Microsystems, Inc.
 * All rights reserved.
 */

/*      Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
/*        All Rights Reserved   */


/*LINTLIBRARY*/

#include        <sys/types.h>
#include        <stdio.h>
#include        <ctype.h>
#include        <userdefs.h>
#include        <users.h>

/*
 * validate string given as group name.
 */
int
valid_gname(char *group, struct group **gptr, int *warning)
{
        struct group *t_gptr;
        char *ptr = group;
        char c;
        int len = 0;
        int badchar = 0;

        *warning = 0;
        if (!group || !*group)
                return (INVALID);

        for (c = *ptr; c != '\0'; ptr++, c = *ptr) {
                len++;
                if (!isprint(c) || (c == ':') || (c == '\n'))
                        return (INVALID);
                if (!(islower(c) || isdigit(c)))
                        badchar++;
        }

        /*
         * XXX constraints causes some operational/compatibility problem.
         * This has to be revisited in the future as ARC/standards issue.
         */
        if (len > MAXGLEN - 1)
                *warning = *warning | WARN_NAME_TOO_LONG;
        if (badchar != 0)
                *warning = *warning | WARN_BAD_GROUP_NAME;

        if ((t_gptr = getgrnam(group)) != NULL) {
                if (gptr) *gptr = t_gptr;
                return (NOTUNIQUE);
        }
        return (UNIQUE);
}