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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)
*/
BOOL getgroups_user(const char *user, gid_t **ret_groups, int *ngroups)
{
struct passwd *pwd;
int ngrp, max_grp;
gid_t *temp_groups;
gid_t *groups;
int i;
pwd = getpwnam_alloc(user);
if (!pwd) return False;
max_grp = groups_max();
temp_groups = (gid_t *)malloc(sizeof(gid_t) * max_grp);
if (! temp_groups) {
passwd_free(&pwd);
return False;
}
if (sys_getgrouplist(user, pwd->pw_gid, temp_groups, &max_grp) == -1) {
gid_t *groups_tmp;
groups_tmp = Realloc(temp_groups, sizeof(gid_t) * max_grp);
if (!groups_tmp) {
SAFE_FREE(temp_groups);
return False;
}
temp_groups = groups_tmp;
if (sys_getgrouplist(user, pwd->pw_gid, temp_groups, &max_grp) == -1) {
DEBUG(0, ("get_user_groups: failed to get the unix group list\n"));
passwd_free(&pwd);
SAFE_FREE(temp_groups);
return False;
}
}
ngrp = 0;
groups = NULL;
/* Add in primary group first */
add_gid_to_array_unique(pwd->pw_gid, &groups, &ngrp);
passwd_free(&pwd);
for (i=0; i<max_grp; i++)
add_gid_to_array_unique(temp_groups[i], &groups, &ngrp);
*ngroups = ngrp;
*ret_groups = groups;
SAFE_FREE(temp_groups);
return True;
}
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