nis/nss_nisplus/nisplus-pwd.c

   1 /* Copyright (C) 1997, 1999, 2001 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 Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the 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    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #include <nss.h>
  21 #include <errno.h>
  22 #include <pwd.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;
  33 static nis_name tablename_val;
  34 static u_long tablename_len;
  35
  36 static enum nss_status
  37 _nss_create_tablename (int *errnop)
  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         {
  49           *errnop = errno;
  50           return NSS_STATUS_TRYAGAIN;
  51         }
  52       tablename_len = strlen (tablename_val);
  53     }
  54   return NSS_STATUS_SUCCESS;
  55 }
  56
  57
  58 enum nss_status
  59 _nss_nisplus_setpwent (int stayopen)
  60 {
  61   enum nss_status status = NSS_STATUS_SUCCESS;
  62   int err;
  63
  64   __libc_lock_lock (lock);
  65
  66   if (result)
  67     nis_freeresult (result);
  68   result = NULL;
  69
  70   if (tablename_val == NULL)
  71     status = _nss_create_tablename (&err);
  72
  73   __libc_lock_unlock (lock);
  74
  75   return status;
  76 }
  77
  78 enum nss_status
  79 _nss_nisplus_endpwent (void)
  80 {
  81   __libc_lock_lock (lock);
  82
  83   if (result)
  84     nis_freeresult (result);
  85   result = NULL;
  86
  87   __libc_lock_unlock (lock);
  88
  89   return NSS_STATUS_SUCCESS;
  90 }
  91
  92 static enum nss_status
  93 internal_nisplus_getpwent_r (struct passwd *pw, char *buffer, size_t buflen,
  94                              int *errnop)
  95 {
  96   int parse_res;
  97
  98   /* Get the next entry until we found a correct one. */
  99   do
 100     {
 101       nis_result *saved_res;
 102
 103       if (result == NULL)
 104         {
 105           saved_res = NULL;
 106           if (tablename_val == NULL)
 107             {
 108               enum nss_status status = _nss_create_tablename (errnop);
 109
 110               if (status != NSS_STATUS_SUCCESS)
 111                 return status;
 112             }
 113
 114           result = nis_first_entry (tablename_val);
 115           if (niserr2nss (result->status) != NSS_STATUS_SUCCESS)
 116             return niserr2nss (result->status);
 117         }
 118       else
 119         {
 120           nis_result *res;
 121
 122           saved_res = result;
 123           res = nis_next_entry (tablename_val, &result->cookie);
 124           result = res;
 125           if (niserr2nss (result->status) != NSS_STATUS_SUCCESS)
 126             {
 127               nis_freeresult (saved_res);
 128               return niserr2nss (result->status);
 129             }
 130         }
 131
 132       parse_res = _nss_nisplus_parse_pwent (result, pw, buffer,
 133                                             buflen, errnop);
 134       if (parse_res == -1)
 135         {
 136           nis_freeresult (result);
 137           result = saved_res;
 138           *errnop = ERANGE;
 139           return NSS_STATUS_TRYAGAIN;
 140         }
 141       else
 142         {
 143           if (saved_res)
 144             nis_freeresult (saved_res);
 145         }
 146     } while (!parse_res);
 147
 148   return NSS_STATUS_SUCCESS;
 149 }
 150
 151 enum nss_status
 152 _nss_nisplus_getpwent_r (struct passwd *result, char *buffer, size_t buflen,
 153                          int *errnop)
 154 {
 155   int status;
 156
 157   __libc_lock_lock (lock);
 158
 159   status = internal_nisplus_getpwent_r (result, buffer, buflen, errnop);
 160
 161   __libc_lock_unlock (lock);
 162
 163   return status;
 164 }
 165
 166 enum nss_status
 167 _nss_nisplus_getpwnam_r (const char *name, struct passwd *pw,
 168                          char *buffer, size_t buflen, int *errnop)
 169 {
 170   int parse_res;
 171
 172   if (tablename_val == NULL)
 173     {
 174       enum nss_status status = _nss_create_tablename (errnop);
 175
 176       if (status != NSS_STATUS_SUCCESS)
 177         return status;
 178     }
 179
 180   if (name == NULL)
 181     {
 182       *errnop = EINVAL;
 183       return NSS_STATUS_UNAVAIL;
 184     }
 185   else
 186     {
 187       nis_result *result;
 188       char buf[strlen (name) + 24 + tablename_len];
 189
 190       sprintf (buf, "[name=%s],%s", name, tablename_val);
 191
 192       result = nis_list(buf, FOLLOW_PATH | FOLLOW_LINKS, NULL, NULL);
 193
 194       if (niserr2nss (result->status) != NSS_STATUS_SUCCESS)
 195         {
 196           enum nss_status status =  niserr2nss (result->status);
 197
 198           nis_freeresult (result);
 199           return status;
 200         }
 201
 202       parse_res = _nss_nisplus_parse_pwent (result, pw, buffer, buflen,
 203                                             errnop);
 204
 205       nis_freeresult (result);
 206
 207       if (parse_res < 1)
 208         {
 209           if (parse_res == -1)
 210             {
 211               *errnop = ERANGE;
 212               return NSS_STATUS_TRYAGAIN;
 213             }
 214           else
 215             return NSS_STATUS_NOTFOUND;
 216         }
 217       return NSS_STATUS_SUCCESS;
 218     }
 219 }
 220
 221 enum nss_status
 222 _nss_nisplus_getpwuid_r (const uid_t uid, struct passwd *pw,
 223                          char *buffer, size_t buflen, int *errnop)
 224 {
 225   if (tablename_val == NULL)
 226     {
 227       enum nss_status status = _nss_create_tablename (errnop);
 228
 229       if (status != NSS_STATUS_SUCCESS)
 230         return status;
 231     }
 232
 233   {
 234     int parse_res;
 235     nis_result *result;
 236     char buf[100 + tablename_len];
 237
 238     sprintf (buf, "[uid=%lu],%s", (unsigned long int) uid, tablename_val);
 239
 240     result = nis_list(buf, FOLLOW_PATH | FOLLOW_LINKS, NULL, NULL);
 241
 242     if (niserr2nss (result->status) != NSS_STATUS_SUCCESS)
 243       {
 244         enum nss_status status = niserr2nss (result->status);
 245
 246         nis_freeresult (result);
 247         return status;
 248       }
 249
 250     parse_res = _nss_nisplus_parse_pwent (result, pw, buffer, buflen, errnop);
 251
 252     nis_freeresult (result);
 253
 254     if (parse_res < 1)
 255       {
 256         if (parse_res == -1)
 257           {
 258             *errnop = ERANGE;
 259             return NSS_STATUS_TRYAGAIN;
 260           }
 261         else
 262           return NSS_STATUS_NOTFOUND;
 263       }
 264     return NSS_STATUS_SUCCESS;
 265   }
 266 }