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/*
* 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.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
/* Copyright (c) 1988 AT&T */
/* All Rights Reserved */
#pragma weak initgroups = _initgroups
#include "synonyms.h"
#include <stdlib.h>
#include <errno.h>
#include <grp.h>
#include <sys/types.h>
#include <sys/param.h>
#include <unistd.h>
/* Private interface to the groups code in getgrnam.c */
extern int _getgroupsbymember(const char *, gid_t[], int, int);
int
initgroups(const char *uname, gid_t agroup)
{
gid_t *groups;
long ngroups_max;
int ngroups;
int errsave, retsave;
if ((ngroups_max = sysconf(_SC_NGROUPS_MAX)) < 0) {
/* ==== Hope sysconf() set errno to something sensible */
return (-1);
}
/*
* ngroups_max is the maximum number of supplemental groups per
* process. if no supplemental groups are allowed, we're done.
*/
if (ngroups_max == 0)
return (0);
if ((groups = (gid_t *)calloc(ngroups_max, sizeof (gid_t))) == 0) {
errno = ENOMEM;
return (-1);
}
groups[0] = agroup;
ngroups = _getgroupsbymember(uname, groups, (int)ngroups_max,
(agroup <= MAXUID) ? 1 : 0);
if (ngroups < 0) {
/* XXX -- man page does not define a value for errno in */
/* this case. Should be looked into sometime. */
free(groups);
return (-1);
}
retsave = setgroups(ngroups, groups);
errsave = errno;
free(groups);
errno = errsave;
return (retsave);
}
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