nis/nss_nisplus/nisplus-spwd.c

   1 /* Copyright (C) 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>, 1997.
   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 <errno.h>
  22 #include <shadow.h>
  23 #include <string.h>
  24 #include <bits/libc-lock.h>
  25 #include <rpcsvc/nis.h>
  26
  27 #include "nss-nisplus.h"
  28 #include "nisplus-parser.h"
  29
  30 __libc_lock_define_initialized (static, lock)
  31
  32 static nis_result *result = NULL;
  33 static nis_name tablename_val = NULL;
  34 static u_long tablename_len = 0;
  35
  36 static enum nss_status
  37 _nss_create_tablename (void)
  38 {
  39   if (tablename_val == NULL)
  40     {
  41       char buf [40 + strlen (nis_local_directory ())];
  42       char *p;
  43
  44       p = stpcpy (buf, "passwd.org_dir.");
  45       p = stpcpy (p, nis_local_directory ());
  46       tablename_val = strdup (buf);
  47       if (tablename_val == NULL)
  48         return NSS_STATUS_TRYAGAIN;
  49       tablename_len = strlen (tablename_val);
  50     }
  51   return NSS_STATUS_SUCCESS;
  52 }
  53
  54 enum nss_status
  55 _nss_nisplus_setspent (void)
  56 {
  57   enum nss_status status = NSS_STATUS_SUCCESS;
  58
  59   __libc_lock_lock (lock);
  60
  61   if (result)
  62     nis_freeresult (result);
  63   result = NULL;
  64
  65   if (tablename_val == NULL)
  66     status = _nss_create_tablename ();
  67
  68   __libc_lock_unlock (lock);
  69
  70   return NSS_STATUS_SUCCESS;
  71 }
  72
  73 enum nss_status
  74 _nss_nisplus_endspent (void)
  75 {
  76   __libc_lock_lock (lock);
  77
  78   if (result)
  79     nis_freeresult (result);
  80   result = NULL;
  81
  82   __libc_lock_unlock (lock);
  83
  84   return NSS_STATUS_SUCCESS;
  85 }
  86
  87 static enum nss_status
  88 internal_nisplus_getspent_r (struct spwd *sp, char *buffer, size_t buflen)
  89 {
  90   int parse_res;
  91
  92   /* Get the next entry until we found a correct one. */
  93   do
  94     {
  95       nis_result *saved_res;
  96
  97       if (result == NULL)
  98         {
  99           saved_res = NULL;
 100
 101           if (tablename_val == NULL)
 102             if (_nss_create_tablename () != NSS_STATUS_SUCCESS)
 103               return NSS_STATUS_UNAVAIL;
 104
 105           result = nis_first_entry (tablename_val);
 106           if (niserr2nss (result->status) != NSS_STATUS_SUCCESS)
 107             return niserr2nss (result->status);
 108         }
 109       else
 110         {
 111           nis_result *res;
 112
 113           saved_res = result;
 114           res = nis_next_entry (tablename_val, &result->cookie);
 115           result = res;
 116           if (niserr2nss (result->status) != NSS_STATUS_SUCCESS)
 117             {
 118               nis_freeresult (saved_res);
 119               return niserr2nss (result->status);
 120             }
 121         }
 122
 123       if ((parse_res = _nss_nisplus_parse_spent (result, sp, buffer,
 124                                                  buflen)) == -1)
 125         {
 126           nis_freeresult (result);
 127           result = saved_res;
 128           return NSS_STATUS_TRYAGAIN;
 129         }
 130       else
 131         {
 132           if (saved_res)
 133             nis_freeresult (saved_res);
 134         }
 135     } while (!parse_res);
 136
 137   return NSS_STATUS_SUCCESS;
 138 }
 139
 140 enum nss_status
 141 _nss_nisplus_getspent_r (struct spwd *result, char *buffer, size_t buflen)
 142 {
 143   int status;
 144
 145   __libc_lock_lock (lock);
 146
 147   status = internal_nisplus_getspent_r (result, buffer, buflen);
 148
 149   __libc_lock_unlock (lock);
 150
 151   return status;
 152 }
 153
 154 enum nss_status
 155 _nss_nisplus_getspnam_r (const char *name, struct spwd *sp,
 156                      char *buffer, size_t buflen)
 157 {
 158   int parse_res;
 159
 160   if (tablename_val == NULL)
 161     if (_nss_create_tablename () != NSS_STATUS_SUCCESS)
 162       return NSS_STATUS_UNAVAIL;
 163
 164   if (name == NULL || strlen (name) > 8)
 165     return NSS_STATUS_NOTFOUND;
 166   else
 167     {
 168       nis_result *result;
 169       char buf[strlen (name) + 24 + tablename_len];
 170
 171       sprintf (buf, "[name=%s],%s", name, tablename_val);
 172
 173       result = nis_list (buf, FOLLOW_PATH | FOLLOW_LINKS, NULL, NULL);
 174
 175       if (niserr2nss (result->status) != NSS_STATUS_SUCCESS)
 176         {
 177           enum nss_status status = niserr2nss (result->status);
 178
 179           nis_freeresult (result);
 180           return status;
 181         }
 182
 183       parse_res = _nss_nisplus_parse_spent (result, sp, buffer, buflen);
 184       nis_freeresult (result);
 185
 186       if (parse_res == -1)
 187         return NSS_STATUS_TRYAGAIN;
 188
 189       if (parse_res)
 190         return NSS_STATUS_SUCCESS;
 191
 192       return NSS_STATUS_NOTFOUND;
 193     }
 194 }