1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22/*
23 * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
24 * Use is subject to license terms.
25 */
26
27/*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
28/*	  All Rights Reserved  	*/
29
30
31#pragma ident	"%Z%%M%	%I%	%E% SMI"	/* SVr4.0 1.2 */
32
33/*LINTLIBRARY*/
34
35#include	<sys/types.h>
36#include	<stdio.h>
37#include	<stdlib.h>
38#include	<ctype.h>
39#include	<errno.h>
40#include	<limits.h>
41#include	<sys/param.h>
42#include	<users.h>
43#include	<userdefs.h>
44
45extern int valid_gid(gid_t, struct group **);
46
47static int isalldigit(char *);
48
49/*
50 *	validate a group name or number and return the appropriate
51 *	group structure for it.
52 */
53int
54valid_group(char *group, struct group **gptr, int *warning)
55{
56	int r, warn;
57	long l;
58	char *ptr;
59	struct group *grp;
60
61	*warning = 0;
62
63	if (!isalldigit(group))
64		return (valid_gname(group, gptr, warning));
65
66	/*
67	 * There are only digits in group name.
68	 * strtol() doesn't return negative number here.
69	 */
70	errno = 0;
71	l = strtol(group, &ptr, 10);
72	if ((l == LONG_MAX && errno == ERANGE) || l > MAXUID) {
73		r = TOOBIG;
74	} else {
75		if ((r = valid_gid((gid_t)l, &grp)) == NOTUNIQUE) {
76			/* It is a valid existing gid */
77			if (gptr != NULL)
78				*gptr = grp;
79			return (NOTUNIQUE);
80		}
81	}
82	/*
83	 * It's all digit, but not a valid gid nor an existing gid.
84	 * There might be an existing group name of all digits.
85	 */
86	if (valid_gname(group, &grp, &warn) == NOTUNIQUE) {
87		/* It does exist */
88		*warning = warn;
89		if (gptr != NULL)
90			*gptr = grp;
91		return (NOTUNIQUE);
92	}
93	/*
94	 * It isn't either existing gid or group name. We return the
95	 * error code from valid_gid() assuming that given string
96	 * represents an integer GID.
97	 */
98	return (r);
99}
100
101static int
102isalldigit(char *str)
103{
104	while (*str != '\0') {
105		if (!isdigit((unsigned char)*str))
106			return (0);
107		str++;
108	}
109	return (1);
110}
111