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/*
* libexplain - Explain errno values returned by libc functions
* Copyright (C) 2008-2010, 2013 Peter Miller
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <libexplain/ac/limits.h> /* for NGROUPS_MAX on Solaris */
#include <libexplain/ac/sys/param.h>
#include <libexplain/ac/unistd.h>
#include <libexplain/group_in_groups.h>
#include <libexplain/have_permission.h>
int
explain_group_in_groups(int gid, const explain_have_identity_t *hip)
{
gid_t groups[NGROUPS_MAX];
int n;
int j;
/*
* FIXME: NFS only transports 16 of the groups (this is because
* Solaris only supports NGROUPS_MAX=16, and Sun invented NFS). We
* need to diagnose the case where they are in the list of groups on
* Linux (where NGROUPS_MAX > 16), but are not in the list of groups
* on the NFS server.
*/
if (gid == hip->gid)
return 1;
n = getgroups(NGROUPS_MAX, groups);
for (j = 0; j < n; ++j)
if (groups[j] == (gid_t)gid)
return 1;
return 0;
}
/* vim: set ts=8 sw=4 et : */
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