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/* Copyright (C) 1997-2019 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Thorsten Kukuk <kukuk@vt.uni-paderborn.de>, 1997.
The GNU C Library 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 2.1 of the License, or (at your option) any later version.
The GNU C Library 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 the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <nss.h>
#include <errno.h>
#include <ctype.h>
#include <netdb.h>
#include <string.h>
#include <netgroup.h>
#include <rpcsvc/nis.h>
#include "nss-nisplus.h"
#define NISENTRYVAL(idx, col, res) \
(NIS_RES_OBJECT (res)[idx].EN_data.en_cols.en_cols_val[col].ec_value.ec_value_val)
#define NISENTRYLEN(idx, col, res) \
(NIS_RES_OBJECT (res)[idx].EN_data.en_cols.en_cols_val[col].ec_value.ec_value_len)
enum nss_status
_nss_nisplus_getnetgrent_r (struct __netgrent *result, char *buffer,
size_t buflen, int *errnop)
{
enum nss_status status;
/* Some sanity checks. */
if (result->data == NULL || result->data_size == 0)
return NSS_STATUS_NOTFOUND;
if (result->position == result->data_size)
return result->first ? NSS_STATUS_NOTFOUND : NSS_STATUS_RETURN;
unsigned int entrylen
= NISENTRYLEN (result->position, 1, (nis_result *) result->data);
if (entrylen > 0)
{
/* We have a list of other netgroups. */
result->type = group_val;
if (entrylen >= buflen)
{
*errnop = ERANGE;
return NSS_STATUS_TRYAGAIN;
}
strncpy (buffer, NISENTRYVAL (result->position, 1,
(nis_result *) result->data),
entrylen);
buffer[entrylen] = '\0';
result->val.group = buffer;
++result->position;
result->first = 0;
return NSS_STATUS_SUCCESS;
}
/* Before we can copy the entry to the private buffer we have to make
sure it is big enough. */
unsigned int hostlen
= NISENTRYLEN (result->position, 2, (nis_result *) result->data);
unsigned int userlen
= NISENTRYLEN (result->position, 3, (nis_result *) result->data);
unsigned int domainlen
= NISENTRYLEN (result->position, 4, (nis_result *) result->data);
if (hostlen + userlen + domainlen + 6 > buflen)
{
*errnop = ERANGE;
status = NSS_STATUS_TRYAGAIN;
}
else
{
char *cp = buffer;
result->type = triple_val;
if (hostlen == 0
|| NISENTRYVAL (result->position, 2,
(nis_result *) result->data)[0] == '\0')
result->val.triple.host = NULL;
else
{
result->val.triple.host = cp;
cp = __stpncpy (cp, NISENTRYVAL (result->position, 2,
(nis_result *) result->data),
hostlen);
*cp++ = '\0';
}
if (userlen == 0
|| NISENTRYVAL (result->position, 3,
(nis_result *) result->data)[0] == '\0')
result->val.triple.user = NULL;
else
{
result->val.triple.user = cp;
cp = __stpncpy (cp, NISENTRYVAL (result->position, 3,
(nis_result *) result->data),
userlen);
*cp++ = '\0';
}
if (domainlen == 0
|| NISENTRYVAL (result->position, 4,
(nis_result *) result->data)[0] == '\0')
result->val.triple.domain = NULL;
else
{
result->val.triple.domain = cp;
cp = __stpncpy (cp, NISENTRYVAL (result->position, 4,
(nis_result *) result->data),
domainlen);
*cp = '\0';
}
status = NSS_STATUS_SUCCESS;
/* Remember where we stopped reading. */
++result->position;
result->first = 0;
}
return status;
}
static void
internal_endnetgrent (struct __netgrent *netgrp)
{
nis_freeresult ((nis_result *) netgrp->data);
netgrp->data = NULL;
netgrp->data_size = 0;
netgrp->position = 0;
}
enum nss_status
_nss_nisplus_setnetgrent (const char *group, struct __netgrent *netgrp)
{
char buf[strlen (group) + 25];
if (group == NULL || group[0] == '\0')
return NSS_STATUS_UNAVAIL;
enum nss_status status = NSS_STATUS_SUCCESS;
snprintf (buf, sizeof (buf), "[name=%s],netgroup.org_dir", group);
netgrp->data = (char *) nis_list (buf, EXPAND_NAME, NULL, NULL);
if (netgrp->data == NULL)
{
__set_errno (ENOMEM);
status = NSS_STATUS_TRYAGAIN;
}
else if (niserr2nss (((nis_result *) netgrp->data)->status)
!= NSS_STATUS_SUCCESS)
{
status = niserr2nss (((nis_result *) netgrp->data)->status);
internal_endnetgrent (netgrp);
}
else
{
netgrp->data_size = ((nis_result *) netgrp->data)->objects.objects_len;
netgrp->position = 0;
netgrp->first = 1;
}
return status;
}
enum nss_status
_nss_nisplus_endnetgrent (struct __netgrent *netgrp)
{
internal_endnetgrent (netgrp);
return NSS_STATUS_SUCCESS;
}
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