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 #include <rpcsvc/nislib.h>
  27
  28 #include "nss-nisplus.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 extern int _nss_nisplus_parse_pwent (nis_result *res, struct passwd *pw,
  37                                      char *buffer, size_t buflen);
  38
  39 static enum nss_status
  40 _nss_create_tablename (void)
  41 {
  42   if (tablename_val == NULL)
  43     {
  44       char buf [40 + strlen (nis_local_directory ())];
  45       char *p;
  46
  47       p = stpcpy (buf, "passwd.org_dir.");
  48       p = stpcpy (p, nis_local_directory ());
  49       tablename_val = strdup (buf);
  50       if (tablename_val == NULL)
  51         return NSS_STATUS_TRYAGAIN;
  52       tablename_len = strlen (tablename_val);
  53     }
  54   return NSS_STATUS_SUCCESS;
  55 }
  56
  57
  58 enum nss_status
  59 _nss_nisplus_setpwent (void)
  60 {
  61   enum nss_status status = NSS_STATUS_SUCCESS;
  62
  63   __libc_lock_lock (lock);
  64
  65   if (result)
  66     nis_freeresult (result);
  67   result = NULL;
  68
  69   if (tablename_val == NULL)
  70     status = _nss_create_tablename ();
  71
  72   __libc_lock_unlock (lock);
  73
  74   return status;
  75 }
  76
  77 enum nss_status
  78 _nss_nisplus_endpwent (void)
  79 {
  80   __libc_lock_lock (lock);
  81
  82   if (result)
  83     nis_freeresult (result);
  84   result = NULL;
  85
  86   __libc_lock_unlock (lock);
  87
  88   return NSS_STATUS_SUCCESS;
  89 }
  90
  91 static enum nss_status
  92 internal_nisplus_getpwent_r (struct passwd *pw, char *buffer, size_t buflen)
  93 {
  94   int parse_res;
  95
  96   /* Get the next entry until we found a correct one. */
  97   do
  98     {
  99       nis_result *saved_res;
 100
 101       if (result == NULL)
 102         {
 103           saved_res = NULL;
 104           if (tablename_val == NULL)
 105             if (_nss_create_tablename () != NSS_STATUS_SUCCESS)
 106               return NSS_STATUS_UNAVAIL;
 107
 108           result = nis_first_entry(tablename_val);
 109           if (niserr2nss (result->status) != NSS_STATUS_SUCCESS)
 110             return niserr2nss (result->status);
 111         }
 112       else
 113         {
 114           nis_result *res;
 115
 116           saved_res = result;
 117           res = nis_next_entry(tablename_val, &result->cookie);
 118           result = res;
 119           if (niserr2nss (result->status) != NSS_STATUS_SUCCESS)
 120             {
 121               nis_freeresult (saved_res);
 122               return niserr2nss (result->status);
 123             }
 124         }
 125
 126       if ((parse_res = _nss_nisplus_parse_pwent (result, pw, buffer,
 127                                                  buflen)) == -1)
 128         {
 129           nis_freeresult (result);
 130           result = saved_res;
 131           return NSS_STATUS_TRYAGAIN;
 132         }
 133       else
 134         {
 135           if (saved_res)
 136             nis_freeresult (saved_res);
 137         }
 138     } while (!parse_res);
 139
 140   return NSS_STATUS_SUCCESS;
 141 }
 142
 143 enum nss_status
 144 _nss_nisplus_getpwent_r (struct passwd *result, char *buffer, size_t buflen)
 145 {
 146   int status;
 147
 148   __libc_lock_lock (lock);
 149
 150   status = internal_nisplus_getpwent_r (result, buffer, buflen);
 151
 152   __libc_lock_unlock (lock);
 153
 154   return status;
 155 }
 156
 157 enum nss_status
 158 _nss_nisplus_getpwnam_r (const char *name, struct passwd *pw,
 159                      char *buffer, size_t buflen)
 160 {
 161   int parse_res;
 162
 163   if (tablename_val == NULL)
 164     if (_nss_create_tablename () != NSS_STATUS_SUCCESS)
 165       return NSS_STATUS_UNAVAIL;
 166
 167   if (name == NULL || strlen (name) > 8)
 168     return NSS_STATUS_NOTFOUND;
 169   else
 170     {
 171       nis_result *result;
 172       char buf[strlen (name) + 24 + tablename_len];
 173
 174       sprintf(buf, "[name=%s],%s", name, tablename_val);
 175
 176       result = nis_list(buf, FOLLOW_PATH | FOLLOW_LINKS, NULL, NULL);
 177
 178       if (niserr2nss (result->status) != NSS_STATUS_SUCCESS)
 179         {
 180           enum nss_status status =  niserr2nss (result->status);
 181
 182           nis_freeresult (result);
 183           return status;
 184         }
 185
 186       parse_res = _nss_nisplus_parse_pwent (result, pw, buffer, buflen);
 187
 188       nis_freeresult (result);
 189
 190       if (parse_res == -1)
 191         return NSS_STATUS_TRYAGAIN;
 192
 193       if (parse_res)
 194         return NSS_STATUS_SUCCESS;
 195
 196       return NSS_STATUS_NOTFOUND;
 197     }
 198 }
 199
 200 enum nss_status
 201 _nss_nisplus_getpwuid_r (const uid_t uid, struct passwd *pw,
 202                      char *buffer, size_t buflen)
 203 {
 204   if (tablename_val == NULL)
 205     if (_nss_create_tablename () != NSS_STATUS_SUCCESS)
 206       return NSS_STATUS_UNAVAIL;
 207   {
 208     int parse_res;
 209     nis_result *result;
 210     char buf[100 + tablename_len];
 211
 212     sprintf(buf, "[uid=%d],%s", uid, tablename_val);
 213
 214     result = nis_list(buf, FOLLOW_PATH | FOLLOW_LINKS, NULL, NULL);
 215
 216     if (niserr2nss (result->status) != NSS_STATUS_SUCCESS)
 217       {
 218         enum nss_status status = niserr2nss (result->status);
 219
 220         nis_freeresult (result);
 221         return status;
 222       }
 223
 224     parse_res = _nss_nisplus_parse_pwent (result, pw, buffer, buflen);
 225
 226     nis_freeresult (result);
 227
 228     if (parse_res == -1)
 229       return NSS_STATUS_TRYAGAIN;
 230
 231     if (parse_res)
 232       return NSS_STATUS_SUCCESS;
 233
 234     return NSS_STATUS_NOTFOUND;
 235   }
 236 }