nis/nss_nis/nis-netgrp.c

   1 /* Copyright (C) 1996, 1997 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Thorsten Kukuk <kukuk@vt.uni-paderborn.de>, 1996.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Library General Public License as
   7    published by the Free Software Foundation; either version 2 of the
   8    License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Library General Public License for more details.
  14
  15    You should have received a copy of the GNU Library General Public
  16    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  17    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  18    Boston, MA 02111-1307, USA.  */
  19
  20 #include <nss.h>
  21 #include <ctype.h>
  22 #include <errno.h>
  23 #include <bits/libc-lock.h>
  24 #include <netdb.h>
  25 #include <stdio.h>
  26 #include <stdlib.h>
  27 #include <string.h>
  28 #include <netgroup.h>
  29 #include <rpcsvc/yp.h>
  30 #include <rpcsvc/ypclnt.h>
  31
  32 #include "nss-nis.h"
  33
  34 /* Locks the static variables in this file.  */
  35 __libc_lock_define_initialized (static, lock)
  36
  37 static char *data = NULL;
  38 static size_t data_size = 0;
  39 static char *cursor = NULL;;
  40
  41 extern enum nss_status
  42 _nss_netgroup_parseline (char **cursor, struct __netgrent *result,
  43                          char *buffer, size_t buflen, int *errnop);
  44
  45 enum nss_status
  46 _nss_nis_setnetgrent (char *group)
  47 {
  48   char *domain;
  49   char *result;
  50   int len, group_len;
  51   enum nss_status status;
  52
  53   status = NSS_STATUS_SUCCESS;
  54
  55   if (group == NULL || group[0] == '\0')
  56     return NSS_STATUS_UNAVAIL;
  57
  58   if (yp_get_default_domain (&domain))
  59     return NSS_STATUS_UNAVAIL;
  60
  61   __libc_lock_lock (lock);
  62
  63   if (data != NULL)
  64     {
  65       free (data);
  66       data = NULL;
  67       data_size = 0;
  68       cursor = NULL;
  69     }
  70
  71   group_len = strlen (group);
  72
  73   status = yperr2nss (yp_match (domain, "netgroup", group, group_len,
  74                                 &result, &len));
  75   if (status == NSS_STATUS_SUCCESS)
  76     {
  77       if (len > 0)
  78         {
  79           data = malloc (len + 1);
  80           data_size = len;
  81           cursor = strncpy (data, result, len + 1);
  82           data[len] = '\0';
  83           free (result);
  84         }
  85       else
  86         status = NSS_STATUS_NOTFOUND;
  87     }
  88
  89   __libc_lock_unlock (lock);
  90
  91   return status;
  92 }
  93
  94
  95 enum nss_status
  96 _nss_nis_endnetgrent (void)
  97 {
  98   __libc_lock_lock (lock);
  99
 100   if (data != NULL)
 101     {
 102       free (data);
 103       data = NULL;
 104       data_size = 0;
 105       cursor = NULL;
 106     }
 107
 108   __libc_lock_unlock (lock);
 109
 110   return NSS_STATUS_SUCCESS;
 111 }
 112
 113 enum nss_status
 114 _nss_nis_getnetgrent_r (struct __netgrent *result, char *buffer, size_t buflen,
 115                         int *errnop)
 116 {
 117   enum nss_status status;
 118
 119   if (cursor == NULL)
 120     return NSS_STATUS_NOTFOUND;
 121
 122   __libc_lock_lock (lock);
 123
 124   status = _nss_netgroup_parseline (&cursor, result, buffer, buflen, errnop);
 125
 126   __libc_lock_unlock (lock);
 127
 128   return status;
 129 }