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/*
Unix SMB/CIFS implementation.
Samba utility functions, used in smbd only
Copyright (C) Andrew Tridgell 2002
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "includes.h"
/*
This function requires sys_getgrouplist - which is only
available in smbd due to it's use of become_root() in a
legacy systems hack.
*/
/*
return a full list of groups for a user
returns the number of groups the user is a member of. The return will include the
users primary group.
remember to free the resulting gid_t array
NOTE! uses become_root() to gain correct priviages on systems
that lack a native getgroups() call (uses initgroups and getgroups)
*/
int getgroups_user(const char *user, gid_t **groups)
{
struct passwd *pwd;
int ngrp, max_grp;
pwd = getpwnam_alloc(user);
if (!pwd) return -1;
max_grp = groups_max();
(*groups) = (gid_t *)malloc(sizeof(gid_t) * max_grp);
if (! *groups) {
passwd_free(&pwd);
errno = ENOMEM;
return -1;
}
ngrp = sys_getgrouplist(user, pwd->pw_gid, *groups, &max_grp);
if (ngrp <= 0) {
passwd_free(&pwd);
free(*groups);
return ngrp;
}
passwd_free(&pwd);
return ngrp;
}
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