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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
<http://www.gnu.org/licenses/>. */
#include <nss.h>
#include <errno.h>
#include <shadow.h>
#include <string.h>
#include <libc-lock.h>
#include <rpcsvc/nis.h>
#include "nss-nisplus.h"
#include "nisplus-parser.h"
__libc_lock_define_initialized (static, lock)
static nis_result *result;
/* Defined in nisplus-pwd.c. */
extern nis_name pwd_tablename_val attribute_hidden;
extern size_t pwd_tablename_len attribute_hidden;
extern enum nss_status _nss_pwd_create_tablename (int *errnop);
enum nss_status
_nss_nisplus_setspent (int stayopen)
{
enum nss_status status = NSS_STATUS_SUCCESS;
int err;
__libc_lock_lock (lock);
if (result != NULL)
{
nis_freeresult (result);
result = NULL;
}
if (pwd_tablename_val == NULL)
status = _nss_pwd_create_tablename (&err);
__libc_lock_unlock (lock);
return status;
}
enum nss_status
_nss_nisplus_endspent (void)
{
__libc_lock_lock (lock);
if (result != NULL)
{
nis_freeresult (result);
result = NULL;
}
__libc_lock_unlock (lock);
return NSS_STATUS_SUCCESS;
}
static enum nss_status
internal_nisplus_getspent_r (struct spwd *sp, char *buffer, size_t buflen,
int *errnop)
{
int parse_res;
/* Get the next entry until we found a correct one. */
do
{
nis_result *saved_res;
if (result == NULL)
{
saved_res = NULL;
if (pwd_tablename_val == NULL)
{
enum nss_status status = _nss_pwd_create_tablename (errnop);
if (status != NSS_STATUS_SUCCESS)
return status;
}
result = nis_first_entry (pwd_tablename_val);
if (result == NULL)
{
*errnop = errno;
return NSS_STATUS_TRYAGAIN;
}
if (niserr2nss (result->status) != NSS_STATUS_SUCCESS)
return niserr2nss (result->status);
}
else
{
saved_res = result;
result = nis_next_entry (pwd_tablename_val, &result->cookie);
if (result == NULL)
{
*errnop = errno;
return NSS_STATUS_TRYAGAIN;
}
if (niserr2nss (result->status) != NSS_STATUS_SUCCESS)
{
nis_freeresult (saved_res);
return niserr2nss (result->status);
}
}
parse_res = _nss_nisplus_parse_spent (result, sp, buffer,
buflen, errnop);
if (__glibc_unlikely (parse_res == -1))
{
nis_freeresult (result);
result = saved_res;
*errnop = ERANGE;
return NSS_STATUS_TRYAGAIN;
}
if (saved_res != NULL)
nis_freeresult (saved_res);
}
while (!parse_res);
return NSS_STATUS_SUCCESS;
}
enum nss_status
_nss_nisplus_getspent_r (struct spwd *result, char *buffer, size_t buflen,
int *errnop)
{
int status;
__libc_lock_lock (lock);
status = internal_nisplus_getspent_r (result, buffer, buflen, errnop);
__libc_lock_unlock (lock);
return status;
}
enum nss_status
_nss_nisplus_getspnam_r (const char *name, struct spwd *sp,
char *buffer, size_t buflen, int *errnop)
{
int parse_res;
if (pwd_tablename_val == NULL)
{
enum nss_status status = _nss_pwd_create_tablename (errnop);
if (status != NSS_STATUS_SUCCESS)
return status;
}
if (name == NULL)
{
*errnop = EINVAL;
return NSS_STATUS_NOTFOUND;
}
nis_result *result;
char buf[strlen (name) + 9 + pwd_tablename_len];
int olderr = errno;
snprintf (buf, sizeof (buf), "[name=%s],%s", name, pwd_tablename_val);
result = nis_list (buf, FOLLOW_PATH | FOLLOW_LINKS | USE_DGRAM, NULL, NULL);
if (result == NULL)
{
*errnop = ENOMEM;
return NSS_STATUS_TRYAGAIN;
}
if (__glibc_unlikely (niserr2nss (result->status) != NSS_STATUS_SUCCESS))
{
enum nss_status status = niserr2nss (result->status);
__set_errno (olderr);
nis_freeresult (result);
return status;
}
parse_res = _nss_nisplus_parse_spent (result, sp, buffer, buflen, errnop);
nis_freeresult (result);
if (__glibc_unlikely (parse_res < 1))
{
if (parse_res == -1)
{
*errnop = ERANGE;
return NSS_STATUS_TRYAGAIN;
}
else
{
__set_errno (olderr);
return NSS_STATUS_NOTFOUND;
}
}
return NSS_STATUS_SUCCESS;
}
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