nss/nss_db/db-netgrp.c

   1 /* Netgroup file parser in nss_db modules.
   2    Copyright (C) 1996, 1997, 1999, 2000 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, write to the Free
  18    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19    02111-1307 USA.  */
  20
  21 #include <dlfcn.h>
  22 #include <errno.h>
  23 #include <fcntl.h>
  24 #include <netgroup.h>
  25 #include <string.h>
  26 #include <bits/libc-lock.h>
  27 #include <paths.h>
  28
  29 #include "nsswitch.h"
  30 #include "nss_db.h"
  31
  32
  33 #define DBFILE          _PATH_VARDB "netgroup.db"
  34
  35
  36 /* Locks the static variables in this file.  */
  37 __libc_lock_define_initialized (static, lock)
  38 \f
  39 /* Maintenance of the shared handle open on the database.  */
  40 static NSS_DB *db;
  41 static char *entry;
  42 static char *cursor;
  43
  44 enum nss_status
  45 _nss_db_setnetgrent (const char *group)
  46 {
  47   enum nss_status status;
  48
  49   __libc_lock_lock (lock);
  50
  51   status = internal_setent (DBFILE, &db);
  52
  53   if (status == NSS_STATUS_SUCCESS)
  54     {
  55       DBT key = { data: (void *) group, size: strlen (group), flags: 0 };
  56       DBT value;
  57
  58       value.flags = 0;
  59       if (DL_CALL_FCT (db->get, (db->db, NULL, &key, &value, 0)) != 0)
  60         status = NSS_STATUS_NOTFOUND;
  61       else
  62         cursor = entry = value.data;
  63     }
  64
  65   __libc_lock_unlock (lock);
  66
  67   return status;
  68
  69 }
  70
  71
  72 enum nss_status
  73 _nss_db_endnetgrent (void)
  74 {
  75   __libc_lock_lock (lock);
  76
  77   internal_endent (&db);
  78
  79   __libc_lock_unlock (lock);
  80
  81   return NSS_STATUS_SUCCESS;
  82 }
  83
  84
  85 extern enum nss_status _nss_netgroup_parseline (char **cursor,
  86                                                 struct __netgrent *result,
  87                                                 char *buffer, size_t buflen,
  88                                                 int *errnop);
  89
  90 enum nss_status
  91 _nss_db_getnetgrent_r (struct __netgrent *result, char *buffer, size_t buflen,
  92                        int *errnop)
  93 {
  94   int status;
  95
  96   __libc_lock_lock (lock);
  97
  98   status = _nss_netgroup_parseline (&cursor, result, buffer, buflen, errnop);
  99
 100   __libc_lock_unlock (lock);
 101
 102   return status;
 103 }