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/* Copyright (C) 1997, 2003 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, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <nss.h>
#include <errno.h>
#include <ctype.h>
#include <netdb.h>
#include <string.h>
#include <netgroup.h>
#include <bits/libc-lock.h>
#include <rpcsvc/nis.h>
#include "nss-nisplus.h"
__libc_lock_define_initialized (static, lock)
static nis_result *data = NULL;
static unsigned long data_size = 0;
static unsigned long position = 0;
#define NISENTRYVAL(idx,col,res) \
((res)->objects.objects_val[(idx)].EN_data.en_cols.en_cols_val[(col)].ec_value.ec_value_val)
#define NISENTRYLEN(idx,col,res) \
((res)->objects.objects_val[(idx)].EN_data.en_cols.en_cols_val[(col)].ec_value.ec_value_len)
static enum nss_status
_nss_nisplus_parse_netgroup (struct __netgrent *result, char *buffer,
size_t buflen, int *errnop)
{
enum nss_status status;
/* Some sanity checks. */
if (data == NULL || data_size == 0)
return NSS_STATUS_NOTFOUND;
if (position == data_size)
return result->first ? NSS_STATUS_NOTFOUND : NSS_STATUS_RETURN;
if (NISENTRYLEN (position, 1, data) > 0)
{
/* We have a list of other netgroups. */
result->type = group_val;
if (NISENTRYLEN (position, 1, data) >= buflen)
{
*errnop = ERANGE;
return NSS_STATUS_TRYAGAIN;
}
strncpy (buffer, NISENTRYVAL (position, 1, data),
NISENTRYLEN (position, 1, data));
buffer[NISENTRYLEN (position, 1, data)] = '\0';
result->val.group = buffer;
++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. */
if (NISENTRYLEN (position, 2, data) + NISENTRYLEN (position, 3, data) +
NISENTRYLEN (position, 4, data) + 6 > buflen)
{
*errnop = ERANGE;
status = NSS_STATUS_TRYAGAIN;
}
else
{
char *cp = buffer;
result->type = triple_val;
if (NISENTRYLEN (position, 2, data) == 0)
result->val.triple.host = NULL;
else
{
result->val.triple.host = cp;
cp = __stpncpy (cp, NISENTRYVAL (position, 2, data),
NISENTRYLEN (position, 2, data));
*cp++ = '\0';
}
if (NISENTRYLEN (position, 3, data) == 0)
result->val.triple.user = NULL;
else
{
result->val.triple.user = cp;
cp = __stpncpy (cp, NISENTRYVAL (position, 3, data),
NISENTRYLEN (position, 3, data));
*cp++ = '\0';
}
if (NISENTRYLEN (position, 4, data) == 0)
result->val.triple.domain = NULL;
else
{
result->val.triple.domain = cp;
cp = __stpncpy (cp, NISENTRYVAL (position, 4, data),
NISENTRYLEN (position, 4, data));
*cp = '\0';
}
status = NSS_STATUS_SUCCESS;
/* Remember where we stopped reading. */
++position;
result->first = 0;
}
return status;
}
enum nss_status
_nss_nisplus_setnetgrent (const char *group, struct __netgrent *dummy)
{
enum nss_status status;
char buf[strlen (group) + 30];
if (group == NULL || group[0] == '\0')
return NSS_STATUS_UNAVAIL;
status = NSS_STATUS_SUCCESS;
__libc_lock_lock (lock);
if (data != NULL)
{
nis_freeresult (data);
data = NULL;
data_size = 0;
position = 0;
}
sprintf (buf, "[name=%s],netgroup.org_dir", group);
data = nis_list (buf, EXPAND_NAME, NULL, NULL);
if (data == NULL)
{
__set_errno (ENOMEM);
status = NSS_STATUS_TRYAGAIN;
}
else if (niserr2nss (data->status) != NSS_STATUS_SUCCESS)
{
status = niserr2nss (data->status);
nis_freeresult (data);
data = NULL;
}
else
data_size = data->objects.objects_len;
__libc_lock_unlock (lock);
return status;
}
enum nss_status
_nss_nisplus_endnetgrent (struct __netgrent *dummy)
{
__libc_lock_lock (lock);
if (data != NULL)
{
nis_freeresult (data);
data = NULL;
data_size = 0;
position = 0;
}
__libc_lock_unlock (lock);
return NSS_STATUS_SUCCESS;
}
enum nss_status
_nss_nisplus_getnetgrent_r (struct __netgrent *result,
char *buffer, size_t buflen, int *errnop)
{
enum nss_status status;
__libc_lock_lock (lock);
status = _nss_nisplus_parse_netgroup (result, buffer, buflen, errnop);
__libc_lock_unlock (lock);
return status;
}
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