nis/nss_nisplus/nisplus-pwd.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 <pwd.h>
  23 #include <string.h>
  24 #include <bits/libc-lock.h>
  25 #include <rpcsvc/nis.h>
  26
  27 #include "nss-nisplus.h"
  28
  29 __libc_lock_define_initialized (static, lock)
  30
  31 static nis_result *result = NULL;
  32 static nis_name tablename_val = NULL;
  33 static u_long tablename_len = 0;
  34
  35 extern int _nss_nisplus_parse_pwent (nis_result *res, struct passwd *pw,
  36                                      char *buffer, size_t buflen, int *errnop);
  37
  38 static enum nss_status
  39 _nss_create_tablename (int *errnop)
  40 {
  41   if (tablename_val == NULL)
  42     {
  43       char buf [40 + strlen (nis_local_directory ())];
  44       char *p;
  45
  46       p = __stpcpy (buf, "passwd.org_dir.");
  47       p = __stpcpy (p, nis_local_directory ());
  48       tablename_val = __strdup (buf);
  49       if (tablename_val == NULL)
  50         {
  51           *errnop = errno;
  52           return NSS_STATUS_TRYAGAIN;
  53         }
  54       tablename_len = strlen (tablename_val);
  55     }
  56   return NSS_STATUS_SUCCESS;
  57 }
  58
  59
  60 enum nss_status
  61 _nss_nisplus_setpwent (void)
  62 {
  63   enum nss_status status = NSS_STATUS_SUCCESS;
  64   int err;
  65
  66   __libc_lock_lock (lock);
  67
  68   if (result)
  69     nis_freeresult (result);
  70   result = NULL;
  71
  72   if (tablename_val == NULL)
  73     status = _nss_create_tablename (&err);
  74
  75   __libc_lock_unlock (lock);
  76
  77   return status;
  78 }
  79
  80 enum nss_status
  81 _nss_nisplus_endpwent (void)
  82 {
  83   __libc_lock_lock (lock);
  84
  85   if (result)
  86     nis_freeresult (result);
  87   result = NULL;
  88
  89   __libc_lock_unlock (lock);
  90
  91   return NSS_STATUS_SUCCESS;
  92 }
  93
  94 static enum nss_status
  95 internal_nisplus_getpwent_r (struct passwd *pw, char *buffer, size_t buflen,
  96                              int *errnop)
  97 {
  98   int parse_res;
  99
 100   /* Get the next entry until we found a correct one. */
 101   do
 102     {
 103       nis_result *saved_res;
 104
 105       if (result == NULL)
 106         {
 107           saved_res = NULL;
 108           if (tablename_val == NULL)
 109             {
 110               enum nss_status status = _nss_create_tablename (errnop);
 111
 112               if (status != NSS_STATUS_SUCCESS)
 113                 return status;
 114             }
 115
 116           result = nis_first_entry (tablename_val);
 117           if (niserr2nss (result->status) != NSS_STATUS_SUCCESS)
 118             return niserr2nss (result->status);
 119         }
 120       else
 121         {
 122           nis_result *res;
 123
 124           saved_res = result;
 125           res = nis_next_entry (tablename_val, &result->cookie);
 126           result = res;
 127           if (niserr2nss (result->status) != NSS_STATUS_SUCCESS)
 128             {
 129               nis_freeresult (saved_res);
 130               return niserr2nss (result->status);
 131             }
 132         }
 133
 134       parse_res = _nss_nisplus_parse_pwent (result, pw, buffer,
 135                                             buflen, errnop);
 136       if (parse_res == -1)
 137         {
 138           nis_freeresult (result);
 139           result = saved_res;
 140           *errnop = ERANGE;
 141           return NSS_STATUS_TRYAGAIN;
 142         }
 143       else
 144         {
 145           if (saved_res)
 146             nis_freeresult (saved_res);
 147         }
 148     } while (!parse_res);
 149
 150   return NSS_STATUS_SUCCESS;
 151 }
 152
 153 enum nss_status
 154 _nss_nisplus_getpwent_r (struct passwd *result, char *buffer, size_t buflen,
 155                          int *errnop)
 156 {
 157   int status;
 158
 159   __libc_lock_lock (lock);
 160
 161   status = internal_nisplus_getpwent_r (result, buffer, buflen, errnop);
 162
 163   __libc_lock_unlock (lock);
 164
 165   return status;
 166 }
 167
 168 enum nss_status
 169 _nss_nisplus_getpwnam_r (const char *name, struct passwd *pw,
 170                          char *buffer, size_t buflen, int *errnop)
 171 {
 172   int parse_res;
 173
 174   if (tablename_val == NULL)
 175     {
 176       enum nss_status status = _nss_create_tablename (errnop);
 177
 178       if (status != NSS_STATUS_SUCCESS)
 179         return status;
 180     }
 181
 182   if (name == NULL)
 183     {
 184       *errnop = EINVAL;
 185       return NSS_STATUS_UNAVAIL;
 186     }
 187   else
 188     {
 189       nis_result *result;
 190       char buf[strlen (name) + 24 + tablename_len];
 191
 192       sprintf (buf, "[name=%s],%s", name, tablename_val);
 193
 194       result = nis_list(buf, FOLLOW_PATH | FOLLOW_LINKS, NULL, NULL);
 195
 196       if (niserr2nss (result->status) != NSS_STATUS_SUCCESS)
 197         {
 198           enum nss_status status =  niserr2nss (result->status);
 199
 200           nis_freeresult (result);
 201           return status;
 202         }
 203
 204       parse_res = _nss_nisplus_parse_pwent (result, pw, buffer, buflen,
 205                                             errnop);
 206
 207       nis_freeresult (result);
 208
 209       if (parse_res < 1)
 210         {
 211           if (parse_res == -1)
 212             {
 213               *errnop = ERANGE;
 214               return NSS_STATUS_TRYAGAIN;
 215             }
 216           else
 217             return NSS_STATUS_NOTFOUND;
 218         }
 219       return NSS_STATUS_SUCCESS;
 220     }
 221 }
 222
 223 enum nss_status
 224 _nss_nisplus_getpwuid_r (const uid_t uid, struct passwd *pw,
 225                          char *buffer, size_t buflen, int *errnop)
 226 {
 227   if (tablename_val == NULL)
 228     {
 229       enum nss_status status = _nss_create_tablename (errnop);
 230
 231       if (status != NSS_STATUS_SUCCESS)
 232         return status;
 233     }
 234
 235   {
 236     int parse_res;
 237     nis_result *result;
 238     char buf[100 + tablename_len];
 239
 240     sprintf (buf, "[uid=%d],%s", uid, tablename_val);
 241
 242     result = nis_list(buf, FOLLOW_PATH | FOLLOW_LINKS, NULL, NULL);
 243
 244     if (niserr2nss (result->status) != NSS_STATUS_SUCCESS)
 245       {
 246         enum nss_status status = niserr2nss (result->status);
 247
 248         nis_freeresult (result);
 249         return status;
 250       }
 251
 252     parse_res = _nss_nisplus_parse_pwent (result, pw, buffer, buflen, errnop);
 253
 254     nis_freeresult (result);
 255
 256     if (parse_res < 1)
 257       {
 258         if (parse_res == -1)
 259           {
 260             *errnop = ERANGE;
 261             return NSS_STATUS_TRYAGAIN;
 262           }
 263         else
 264           return NSS_STATUS_NOTFOUND;
 265       }
 266     return NSS_STATUS_SUCCESS;
 267   }
 268 }