[openssh.git] / openbsd-compat / getgrouplist.c

/*	$OpenBSD: getgrouplist.c,v 1.12 2005/08/08 08:05:34 espie Exp $ */
/*
 * Copyright (c) 1991, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * 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. 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.
 */

/* OPENBSD ORIGINAL: lib/libc/gen/getgrouplist.c */

#include "includes.h"

#ifndef HAVE_GETGROUPLIST

/*
 * get credential
 */
#include <sys/types.h>
#include <string.h>
#include <unistd.h>
#include <grp.h>

int
getgrouplist(const char *uname, gid_t agroup, gid_t *groups, int *grpcnt)
{
	struct group *grp;
	int i, ngroups;
	int ret, maxgroups;
	int bail;

	ret = 0;
	ngroups = 0;
	maxgroups = *grpcnt;

	/*
	 * install primary group
	 */
	if (ngroups >= maxgroups) {
		*grpcnt = ngroups;
		return (-1);
	}
	groups[ngroups++] = agroup;

	/*
	 * Scan the group file to find additional groups.
	 */
	setgrent();
	while ((grp = getgrent())) {
		if (grp->gr_gid == agroup)
			continue;
		for (bail = 0, i = 0; bail == 0 && i < ngroups; i++)
			if (groups[i] == grp->gr_gid)
				bail = 1;
		if (bail)
			continue;
		for (i = 0; grp->gr_mem[i]; i++) {
			if (!strcmp(grp->gr_mem[i], uname)) {
				if (ngroups >= maxgroups) {
					ret = -1;
					goto out;
				}
				groups[ngroups++] = grp->gr_gid;
				break;
			}
		}
	}
out:
	endgrent();
	*grpcnt = ngroups;
	return (ret);
}

#endif /* HAVE_GETGROUPLIST */
Commit	Line	Data
242652fe	1	/* $OpenBSD: getgrouplist.c,v 1.12 2005/08/08 08:05:34 espie Exp $ */
63b68889	2	/*
	3	* Copyright (c) 1991, 1993
	4	* The Regents of the University of California. All rights reserved.
	5	*
	6	* Redistribution and use in source and binary forms, with or without
	7	* modification, are permitted provided that the following conditions
	8	* are met:
	9	* 1. Redistributions of source code must retain the above copyright
	10	* notice, this list of conditions and the following disclaimer.
	11	* 2. Redistributions in binary form must reproduce the above copyright
	12	* notice, this list of conditions and the following disclaimer in the
	13	* documentation and/or other materials provided with the distribution.
3e67f7df	14	* 3. Neither the name of the University nor the names of its contributors
63b68889	15	* may be used to endorse or promote products derived from this software
	16	* without specific prior written permission.
	17	*
	18	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	19	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	20	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	21	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	22	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	23	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	24	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	25	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	26	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	27	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	28	* SUCH DAMAGE.
	29	*/
	30
f6d4fb87	31	/* OPENBSD ORIGINAL: lib/libc/gen/getgrouplist.c */
f6d4fb87	32
63b68889	33	#include "includes.h"
	34
	35	#ifndef HAVE_GETGROUPLIST
	36
63b68889	37	/*
	38	* get credential
	39	*/
	40	#include <sys/types.h>
	41	#include <string.h>
510a42ce	42	#include <unistd.h>
63b68889	43	#include <grp.h>
	44
	45	int
242652fe	46	getgrouplist(const char uname, gid_t agroup, gid_t groups, int *grpcnt)
63b68889	47	{
242652fe	48	struct group *grp;
242652fe	49	int i, ngroups;
63b68889	50	int ret, maxgroups;
	51	int bail;
	52
	53	ret = 0;
	54	ngroups = 0;
	55	maxgroups = *grpcnt;
	56
	57	/*
	58	* install primary group
	59	*/
	60	if (ngroups >= maxgroups) {
	61	*grpcnt = ngroups;
	62	return (-1);
	63	}
	64	groups[ngroups++] = agroup;
	65
	66	/*
	67	* Scan the group file to find additional groups.
	68	*/
	69	setgrent();
	70	while ((grp = getgrent())) {
	71	if (grp->gr_gid == agroup)
	72	continue;
	73	for (bail = 0, i = 0; bail == 0 && i < ngroups; i++)
	74	if (groups[i] == grp->gr_gid)
	75	bail = 1;
	76	if (bail)
	77	continue;
	78	for (i = 0; grp->gr_mem[i]; i++) {
	79	if (!strcmp(grp->gr_mem[i], uname)) {
	80	if (ngroups >= maxgroups) {
	81	ret = -1;
	82	goto out;
	83	}
	84	groups[ngroups++] = grp->gr_gid;
	85	break;
	86	}
	87	}
	88	}
	89	out:
	90	endgrent();
	91	*grpcnt = ngroups;
	92	return (ret);
	93	}
	94
	95	#endif /* HAVE_GETGROUPLIST */