nis/nss_nisplus/nisplus-rpc.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 <ctype.h>
  23 #include <string.h>
  24 #include <libc-lock.h>
  25 #include <rpc/netdb.h>
  26 #include <rpcsvc/nis.h>
  27 #include <rpcsvc/nislib.h>
  28
  29 #include "nss-nisplus.h"
  30
  31 __libc_lock_define_initialized (static, lock)
  32
  33 static nis_result *result = NULL;
  34 static nis_name *names = NULL;
  35
  36 #define ENTNAME         rpcent
  37 #define DATABASE        "rpc"
  38 #define TRAILING_LIST_MEMBER            r_aliases
  39 #define TRAILING_LIST_SEPARATOR_P       isspace
  40 #include "../../nss/nss_files/files-parse.c"
  41 LINE_PARSER
  42 ("#",
  43  STRING_FIELD (result->r_name, isspace, 1);
  44  INT_FIELD (result->r_number, isspace, 1, 10,);
  45  )
  46
  47 #define NISENTRYVAL(idx,col,res) \
  48         ((res)->objects.objects_val[(idx)].zo_data.objdata_u.en_data.en_cols.en_cols_val[(col)].ec_value.ec_value_val)
  49
  50 #define NISENTRYLEN(idx,col,res) \
  51         ((res)->objects.objects_val[(idx)].zo_data.objdata_u.en_data.en_cols.en_cols_val[(col)].ec_value.ec_value_len)
  52
  53 static int
  54 _nss_nisplus_parse_rpcent (nis_result *result, struct rpcent *rpc,
  55                            char *buffer, size_t buflen)
  56 {
  57   char *p = buffer;
  58   size_t room_left = buflen;
  59   unsigned int i;
  60   struct parser_data *data = (void *) buffer;
  61
  62   if (result == NULL)
  63     return 0;
  64
  65   if ((result->status != NIS_SUCCESS && result->status != NIS_S_SUCCESS) ||
  66       result->objects.objects_val[0].zo_data.zo_type != ENTRY_OBJ ||
  67       strcmp(result->objects.objects_val[0].zo_data.objdata_u.en_data.en_type,
  68              "rpc_tbl") != 0 ||
  69       result->objects.objects_val[0].zo_data.objdata_u.en_data.en_cols.en_cols_len < 3)
  70     return 0;
  71
  72   memset (p, '\0', room_left);
  73
  74   /* Generate the rpc entry format and use the normal parser */
  75   if (NISENTRYLEN (0, 0, result) +1 > room_left)
  76     {
  77       __set_errno (ERANGE);
  78       return 0;
  79     }
  80   strncpy (p, NISENTRYVAL (0, 0, result), NISENTRYLEN (0, 0, result));
  81   room_left -= (NISENTRYLEN (0, 0, result) +1);
  82
  83   if (NISENTRYLEN (0, 2, result) +1 > room_left)
  84     {
  85       __set_errno (ERANGE);
  86       return 0;
  87     }
  88   strcat (p, "\t");
  89   strncat (p, NISENTRYVAL (0, 2, result), NISENTRYLEN (0, 2, result));
  90   room_left -= (NISENTRYLEN (0, 2, result) + 1);
  91                                        /* + 1: We overwrite the last \0 */
  92
  93   for (i = 0; i < result->objects.objects_len; i++)
  94     /* XXX should we start with i = 0 or with i = 1 ? */
  95     {
  96       if (NISENTRYLEN (i, 1, result) +1 > room_left)
  97         {
  98           __set_errno (ERANGE);
  99           return 0;
 100         }
 101       strcat (p, " ");
 102       strncat (p, NISENTRYVAL (i, 1, result), NISENTRYLEN (i, 1, result));
 103       room_left -= (NISENTRYLEN (i, 1, result) + 1);
 104     }
 105
 106   return _nss_files_parse_rpcent (p, rpc, data, buflen);
 107 }
 108
 109 enum nss_status
 110 _nss_nisplus_setrpcent (void)
 111 {
 112   __libc_lock_lock (lock);
 113
 114   if (result)
 115     nis_freeresult (result);
 116   result = NULL;
 117   if (names)
 118     {
 119       nis_freenames (names);
 120       names = NULL;
 121     }
 122
 123   __libc_lock_unlock (lock);
 124
 125   return NSS_STATUS_SUCCESS;
 126 }
 127
 128 enum nss_status
 129 _nss_nisplus_endrpcent (void)
 130 {
 131   __libc_lock_lock (lock);
 132
 133   if (result)
 134     nis_freeresult (result);
 135   result = NULL;
 136   if (names)
 137     {
 138       nis_freenames (names);
 139       names = NULL;
 140     }
 141
 142   __libc_lock_unlock (lock);
 143
 144   return NSS_STATUS_SUCCESS;
 145 }
 146
 147 static enum nss_status
 148 internal_nisplus_getrpcent_r (struct rpcent *rpc, char *buffer,
 149                               size_t buflen)
 150 {
 151   int parse_res;
 152
 153   /* Get the next entry until we found a correct one. */
 154   do
 155     {
 156       if (result == NULL)
 157         {
 158           names = nis_getnames ("rpc.org_dir");
 159           if (names == NULL || names[0] == NULL)
 160             return NSS_STATUS_UNAVAIL;
 161
 162           result = nis_first_entry(names[0]);
 163           if (niserr2nss (result->status) != NSS_STATUS_SUCCESS)
 164             return niserr2nss (result->status);
 165         }
 166       else
 167         {
 168           nis_result *res;
 169
 170           res = nis_next_entry (names[0], &result->cookie);
 171           nis_freeresult (result);
 172           result = res;
 173           if (niserr2nss (result->status) != NSS_STATUS_SUCCESS)
 174             return niserr2nss (result->status);
 175         }
 176
 177       parse_res = _nss_nisplus_parse_rpcent (result, rpc, buffer, buflen);
 178     } while (!parse_res);
 179
 180   return NSS_STATUS_SUCCESS;
 181 }
 182
 183 enum nss_status
 184 _nss_nisplus_getrpcent_r (struct rpcent *result, char *buffer,
 185                           size_t buflen)
 186 {
 187   int status;
 188
 189   __libc_lock_lock (lock);
 190
 191   status = internal_nisplus_getrpcent_r (result, buffer, buflen);
 192
 193   __libc_lock_unlock (lock);
 194
 195   return status;
 196 }
 197
 198 enum nss_status
 199 _nss_nisplus_getrpcbyname_r (const char *name, struct rpcent *rpc,
 200                              char *buffer, size_t buflen)
 201 {
 202   int parse_res;
 203
 204   if (name == NULL)
 205     return NSS_STATUS_NOTFOUND;
 206   else
 207     {
 208       nis_result *result;
 209       char buf[strlen (name) + 255];
 210
 211       /* Search at first in the alias list, and use the correct name
 212          for the next search */
 213       sprintf (buf, "[name=%s],rpc.org_dir", name);
 214       result = nis_list (buf, EXPAND_NAME, NULL, NULL);
 215
 216       /* If we do not find it, try it as original name. But if the
 217          database is correct, we should find it in the first case, too */
 218       if ((result->status != NIS_SUCCESS &&
 219            result->status != NIS_S_SUCCESS) ||
 220           result->objects.objects_val[0].zo_data.zo_type != ENTRY_OBJ ||
 221           strcmp (result->objects.objects_val[0].zo_data.objdata_u.en_data.en_type,
 222                   "rpc_tbl") != 0 ||
 223           result->objects.objects_val[0].zo_data.objdata_u.en_data.en_cols.en_cols_len < 3)
 224         sprintf (buf, "[cname=%s],rpc.org_dir", name);
 225       else
 226         sprintf (buf, "[cname=%s],rpc.org_dir", NISENTRYVAL(0, 0, result));
 227
 228       nis_freeresult (result);
 229       result = nis_list(buf, EXPAND_NAME, NULL, NULL);
 230
 231       if (niserr2nss (result->status) != NSS_STATUS_SUCCESS)
 232         {
 233           enum nss_status status = niserr2nss (result->status);
 234
 235           nis_freeresult (result);
 236           return status;
 237         }
 238
 239       parse_res = _nss_nisplus_parse_rpcent (result, rpc, buffer, buflen);
 240
 241       nis_freeresult (result);
 242
 243       if (parse_res)
 244         return NSS_STATUS_SUCCESS;
 245
 246       if (!parse_res && errno == ERANGE)
 247         return NSS_STATUS_TRYAGAIN;
 248       else
 249         return NSS_STATUS_NOTFOUND;
 250     }
 251 }
 252
 253 enum nss_status
 254 _nss_nisplus_getrpcbynumber_r (const int number, struct rpcent *rpc,
 255                                 char *buffer, size_t buflen)
 256 {
 257   int parse_res;
 258   nis_result *result;
 259   char buf[100];
 260
 261   snprintf (buf, sizeof (buf), "[number=%d],rpc.org_dir", number);
 262
 263   result = nis_list(buf, EXPAND_NAME, NULL, NULL);
 264
 265   if (niserr2nss (result->status) != NSS_STATUS_SUCCESS)
 266     {
 267       enum nss_status status = niserr2nss (result->status);
 268
 269       nis_freeresult (result);
 270       return status;
 271     }
 272
 273   parse_res = _nss_nisplus_parse_rpcent (result, rpc, buffer, buflen);
 274
 275   nis_freeresult (result);
 276
 277   if (parse_res)
 278     return NSS_STATUS_SUCCESS;
 279
 280   if (!parse_res && errno == ERANGE)
 281     return NSS_STATUS_TRYAGAIN;
 282   else
 283     return NSS_STATUS_NOTFOUND;
 284 }