nis/nis_table.c

   1 /* Copyright (c) 1997, 1998, 1999, 2003 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Thorsten Kukuk <kukuk@suse.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 <string.h>
  21 #include <rpcsvc/nis.h>
  22
  23 #include "nis_xdr.h"
  24 #include "nis_intern.h"
  25
  26
  27 static struct ib_request *
  28 __create_ib_request (const_nis_name name, unsigned int flags)
  29 {
  30   struct ib_request *ibreq = calloc (1, sizeof (ib_request));
  31   char buf[strlen (name) + 1];
  32   nis_attr *search_val = NULL;
  33   size_t search_len = 0;
  34   char *cptr;
  35   size_t size = 0;
  36
  37   if (ibreq == NULL)
  38     return NULL;
  39
  40   ibreq->ibr_flags = flags;
  41
  42   cptr = strcpy (buf, name);
  43
  44   /* Not of "[key=value,key=value,...],foo.." format? */
  45   if (cptr[0] != '[')
  46     return (ibreq->ibr_name = strdup (cptr)) == NULL ? NULL : ibreq;
  47
  48   /* "[key=value,...],foo" format */
  49   ibreq->ibr_name = strchr (cptr, ']');
  50   if (ibreq->ibr_name == NULL || ibreq->ibr_name[1] != ',')
  51     {
  52       ibreq->ibr_name = NULL; /* Or the xdr_* functions will dump */
  53       nis_free_request (ibreq);
  54       return NULL;
  55     }
  56
  57   /* Check if we have an entry of "[key=value,],bar". If, remove the "," */
  58   if (ibreq->ibr_name[-1] == ',')
  59     ibreq->ibr_name[-1] = '\0';
  60   else
  61     ibreq->ibr_name[0] = '\0';
  62   ibreq->ibr_name += 2;
  63   ibreq->ibr_name = strdup (ibreq->ibr_name);
  64   if (ibreq->ibr_name == NULL)
  65     return NULL;
  66
  67   ++cptr; /* Remove "[" */
  68
  69   while (cptr != NULL && cptr[0] != '\0')
  70     {
  71       char *key = cptr;
  72       char *val = strchr (cptr, '=');
  73
  74       cptr = strchr (key, ',');
  75       if (cptr != NULL)
  76         *cptr++ = '\0';
  77
  78       if (!val)
  79         {
  80           nis_free_request (ibreq);
  81           return NULL;
  82         }
  83       *val++ = '\0';
  84       if ((search_len + 1) >= size)
  85         {
  86           size += 1;
  87           search_val = realloc (search_val, size * sizeof (nis_attr));
  88           if (search_val == NULL)
  89             return NULL;
  90         }
  91       search_val[search_len].zattr_ndx = strdup (key);
  92       if ((search_val[search_len].zattr_ndx) == NULL)
  93         return NULL;
  94
  95       search_val[search_len].zattr_val.zattr_val_len = strlen (val) + 1;
  96       search_val[search_len].zattr_val.zattr_val_val = strdup (val);
  97       if (search_val[search_len].zattr_val.zattr_val_val == NULL)
  98         return NULL;
  99
 100       ++search_len;
 101     }
 102
 103   ibreq->ibr_srch.ibr_srch_val = search_val;
 104   ibreq->ibr_srch.ibr_srch_len = search_len;
 105
 106   return ibreq;
 107 }
 108
 109 static struct timeval RPCTIMEOUT = {10, 0};
 110
 111 static char *
 112 __get_tablepath (char *name, dir_binding *bptr)
 113 {
 114   enum clnt_stat result;
 115   nis_result *res = calloc (1, sizeof (nis_result));
 116   struct ns_request req;
 117
 118   if (res == NULL)
 119     return NULL;
 120
 121   req.ns_name = name;
 122   req.ns_object.ns_object_len = 0;
 123   req.ns_object.ns_object_val = NULL;
 124
 125   result = clnt_call (bptr->clnt, NIS_LOOKUP, (xdrproc_t) _xdr_ns_request,
 126                       (caddr_t) &req, (xdrproc_t) _xdr_nis_result,
 127                       (caddr_t) res, RPCTIMEOUT);
 128
 129   if (result == RPC_SUCCESS && NIS_RES_STATUS (res) == NIS_SUCCESS &&
 130       __type_of (NIS_RES_OBJECT (res)) == NIS_TABLE_OBJ)
 131     {
 132       char *cptr = strdup (NIS_RES_OBJECT (res)->TA_data.ta_path);
 133       nis_freeresult (res);
 134       return cptr;
 135     }
 136   else
 137     {
 138       nis_freeresult (res);
 139       return strdup ("");
 140     }
 141 }
 142
 143 nis_result *
 144 nis_list (const_nis_name name, unsigned int flags,
 145           int (*callback) (const_nis_name name,
 146                            const nis_object *object,
 147                            const void *userdata),
 148           const void *userdata)
 149 {
 150   nis_result *res = calloc (1, sizeof (nis_result));
 151   ib_request *ibreq;
 152   int status;
 153   enum clnt_stat clnt_status;
 154   int count_links = 0;          /* We will only follow NIS_MAXLINKS links! */
 155   int done = 0;
 156   nis_name *names;
 157   nis_name namebuf[2] = {NULL, NULL};
 158   int name_nr = 0;
 159   nis_cb *cb = NULL;
 160   char *tableptr, *tablepath = NULL;
 161   int have_tablepath = 0;
 162   int first_try = 0; /* Do we try the old binding at first ? */
 163
 164   if (res == NULL)
 165     return NULL;
 166
 167   if (name == NULL)
 168     {
 169       NIS_RES_STATUS (res) = NIS_BADNAME;
 170       return res;
 171     }
 172
 173   if ((ibreq = __create_ib_request (name, flags)) == NULL)
 174     {
 175       NIS_RES_STATUS (res) = NIS_BADNAME;
 176       return res;
 177     }
 178
 179   if ((flags & EXPAND_NAME) &&
 180       ibreq->ibr_name[strlen (ibreq->ibr_name) - 1] != '.')
 181     {
 182       names = nis_getnames (ibreq->ibr_name);
 183       free (ibreq->ibr_name);
 184       ibreq->ibr_name = NULL;
 185       if (names == NULL)
 186         {
 187           nis_free_request (ibreq);
 188           NIS_RES_STATUS (res) = NIS_BADNAME;
 189           return res;
 190         }
 191       ibreq->ibr_name = strdup (names[name_nr]);
 192     }
 193   else
 194     {
 195       names = namebuf;
 196       names[name_nr] = ibreq->ibr_name;
 197     }
 198
 199   cb = NULL;
 200
 201   while (!done)
 202     {
 203       dir_binding bptr;
 204       directory_obj *dir = NULL;
 205
 206       memset (res, '\0', sizeof (nis_result));
 207
 208       status = __nisfind_server (ibreq->ibr_name, &dir);
 209       if (status != NIS_SUCCESS)
 210         {
 211           nis_free_request (ibreq);
 212           NIS_RES_STATUS (res) = status;
 213           return res;
 214         }
 215
 216       status = __nisbind_create (&bptr, dir->do_servers.do_servers_val,
 217                                  dir->do_servers.do_servers_len, flags);
 218       if (status != NIS_SUCCESS)
 219         {
 220           nis_free_request (ibreq);
 221           NIS_RES_STATUS (res) = status;
 222           nis_free_directory (dir);
 223           return res;
 224         }
 225
 226       while (__nisbind_connect (&bptr) != NIS_SUCCESS)
 227         if (__nisbind_next (&bptr) != NIS_SUCCESS)
 228           {
 229             __nisbind_destroy (&bptr);
 230             nis_free_directory (dir);
 231             nis_free_request (ibreq);
 232             NIS_RES_STATUS (res) = NIS_NAMEUNREACHABLE;
 233             return res;
 234           }
 235
 236       if (callback != NULL)
 237         {
 238           cb = __nis_create_callback (callback, userdata, flags);
 239           ibreq->ibr_cbhost.ibr_cbhost_len = 1;
 240           ibreq->ibr_cbhost.ibr_cbhost_val = cb->serv;
 241         }
 242
 243     again:
 244       clnt_status = clnt_call (bptr.clnt, NIS_IBLIST,
 245                                (xdrproc_t) _xdr_ib_request, (caddr_t) ibreq,
 246                                (xdrproc_t) _xdr_nis_result,
 247                                (caddr_t) res, RPCTIMEOUT);
 248
 249       if (clnt_status != RPC_SUCCESS)
 250         NIS_RES_STATUS (res) = NIS_RPCERROR;
 251       else
 252         switch (NIS_RES_STATUS (res))
 253           { /* start switch */
 254           case NIS_PARTIAL:
 255           case NIS_SUCCESS:
 256           case NIS_S_SUCCESS:
 257             if (__type_of (NIS_RES_OBJECT (res)) == NIS_LINK_OBJ &&
 258                 flags & FOLLOW_LINKS)           /* We are following links.  */
 259               {
 260                 free (ibreq->ibr_name);
 261                 ibreq->ibr_name = NULL;
 262                 /* If we hit the link limit, bail.  */
 263                 if (count_links > NIS_MAXLINKS)
 264                   {
 265                     NIS_RES_STATUS (res) = NIS_LINKNAMEERROR;
 266                     ++done;
 267                     break;
 268                   }
 269                 ++count_links;
 270                 ibreq->ibr_name =
 271                   strdup (NIS_RES_OBJECT (res)->LI_data.li_name);
 272                 if (NIS_RES_OBJECT (res)->LI_data.li_attrs.li_attrs_len)
 273                   if (ibreq->ibr_srch.ibr_srch_len == 0)
 274                     {
 275                       ibreq->ibr_srch.ibr_srch_len =
 276                         NIS_RES_OBJECT (res)->LI_data.li_attrs.li_attrs_len;
 277                       ibreq->ibr_srch.ibr_srch_val =
 278                         NIS_RES_OBJECT (res)->LI_data.li_attrs.li_attrs_val;
 279                     }
 280                 nis_freeresult (res);
 281                 res = calloc (1, sizeof (nis_result));
 282                 if (res == NULL)
 283                   {
 284                     if (have_tablepath)
 285                       free (tablepath);
 286                     __nisbind_destroy (&bptr);
 287                     nis_free_directory (dir);
 288                     return NULL;
 289                   }
 290                 first_try = 1; /* Try at first the old binding */
 291                 goto again;
 292               }
 293             else if ((flags & FOLLOW_PATH) &&
 294                      NIS_RES_STATUS (res) == NIS_PARTIAL)
 295               {
 296                 if (!have_tablepath)
 297                   {
 298                     tablepath = __get_tablepath (ibreq->ibr_name, &bptr);
 299                     tableptr = tablepath;
 300                     have_tablepath = 1;
 301                   }
 302                 if (tableptr == NULL)
 303                   {
 304                     ++done;
 305                     break;
 306                   }
 307                 free (ibreq->ibr_name);
 308                 ibreq->ibr_name = strsep (&tableptr, ":");
 309                 if (ibreq->ibr_name == NULL || ibreq->ibr_name[0] == '\0')
 310                   {
 311                     ibreq->ibr_name = strdup ("");
 312                     ++done;
 313                   }
 314                 else
 315                   {
 316                     ibreq->ibr_name = strdup (ibreq->ibr_name);
 317                     nis_freeresult (res);
 318                     res = calloc (1, sizeof (nis_result));
 319                     if (res == NULL || ibreq->ibr_name == NULL)
 320                       {
 321                         if (res)
 322                           free (res);
 323                         nis_free_request (ibreq);
 324                         if (have_tablepath)
 325                           free (tablepath);
 326                         __nisbind_destroy (&bptr);
 327                         nis_free_directory (dir);
 328                         return NULL;
 329                       }
 330                     first_try = 1;
 331                     goto again;
 332                   }
 333               }
 334             else
 335               ++done;
 336             break;
 337           case NIS_CBRESULTS:
 338             if (cb != NULL)
 339               {
 340                 __nis_do_callback (&bptr, &res->cookie, cb);
 341                 NIS_RES_STATUS (res) = cb->result;
 342
 343                 if (!(flags & ALL_RESULTS))
 344                   ++done;
 345                 else
 346                   {
 347                     if (!have_tablepath)
 348                       {
 349                         tablepath = __get_tablepath (ibreq->ibr_name, &bptr);
 350                         tableptr = tablepath;
 351                         have_tablepath = 1;
 352                       }
 353                     if (tableptr == NULL)
 354                       {
 355                         ++done;
 356                         break;
 357                       }
 358                     free (ibreq->ibr_name);
 359                     ibreq->ibr_name = strsep (&tableptr, ":");
 360                     if (ibreq->ibr_name == NULL || ibreq->ibr_name[0] == '\0')
 361                       {
 362                         ibreq->ibr_name = strdup ("");
 363                         ++done;
 364                       }
 365                     else
 366                       ibreq->ibr_name = strdup (ibreq->ibr_name);
 367                   }
 368               }
 369             break;
 370           case NIS_SYSTEMERROR:
 371           case NIS_NOSUCHNAME:
 372           case NIS_NOT_ME:
 373             /* If we had first tried the old binding, do nothing, but
 374                get a new binding */
 375             if (!first_try)
 376               {
 377                 if (__nisbind_next (&bptr) != NIS_SUCCESS)
 378                   {
 379                     ++done;
 380                     break; /* No more servers to search */
 381                   }
 382                 while (__nisbind_connect (&bptr) != NIS_SUCCESS)
 383                   {
 384                     if (__nisbind_next (&bptr) != NIS_SUCCESS)
 385                       {
 386                         ++done;
 387                         break; /* No more servers to search */
 388                       }
 389                   }
 390                 goto again;
 391               }
 392             break;
 393           default:
 394             if (!first_try)
 395               {
 396                 /* Try the next domainname if we don't follow a link.  */
 397                 if (count_links)
 398                   {
 399                     free (ibreq->ibr_name);
 400                     NIS_RES_STATUS (res) = NIS_LINKNAMEERROR;
 401                     ++done;
 402                     break;
 403                   }
 404                 ++name_nr;
 405                 if (names[name_nr] == NULL)
 406                   {
 407                     ++done;
 408                     break;
 409                   }
 410                 ibreq->ibr_name = names[name_nr];
 411                 first_try = 1; /* Try old binding at first */
 412                 goto again;
 413               }
 414             break;
 415           }
 416       first_try = 0;
 417
 418       if (cb)
 419         {
 420           __nis_destroy_callback (cb);
 421           ibreq->ibr_cbhost.ibr_cbhost_len = 0;
 422           ibreq->ibr_cbhost.ibr_cbhost_val = NULL;
 423         }
 424
 425       __nisbind_destroy (&bptr);
 426       nis_free_directory (dir);
 427     }
 428
 429   if (names != namebuf)
 430     nis_freenames (names);
 431
 432   nis_free_request (ibreq);
 433
 434   return res;
 435 }
 436
 437 nis_result *
 438 nis_add_entry (const_nis_name name, const nis_object *obj2, unsigned int flags)
 439 {
 440   nis_object obj;
 441   nis_result *res;
 442   nis_error status;
 443   ib_request *ibreq;
 444   size_t namelen = strlen (name);
 445   char buf1[namelen + 20];
 446   char buf4[namelen + 20];
 447
 448   res = calloc (1, sizeof (nis_result));
 449   if (res == NULL)
 450     return NULL;
 451
 452   if (name == NULL)
 453     {
 454       NIS_RES_STATUS (res) = NIS_BADNAME;
 455       return res;
 456     }
 457
 458   if ((ibreq = __create_ib_request (name, flags)) == NULL)
 459     {
 460       NIS_RES_STATUS (res) = NIS_BADNAME;
 461       return res;
 462     }
 463
 464   memcpy (&obj, obj2, sizeof (nis_object));
 465
 466   if (obj.zo_name == NULL || strlen (obj.zo_name) == 0)
 467     obj.zo_name = nis_leaf_of_r (name, buf1, sizeof (buf1));
 468
 469   if (obj.zo_owner == NULL || strlen (obj.zo_owner) == 0)
 470     obj.zo_owner = nis_local_principal ();
 471
 472   if (obj.zo_group == NULL || strlen (obj.zo_group) == 0)
 473     obj.zo_group = nis_local_group ();
 474
 475   obj.zo_domain = nis_domain_of_r (name, buf4, sizeof (buf4));
 476
 477   ibreq->ibr_obj.ibr_obj_val = nis_clone_object (&obj, NULL);
 478   if (ibreq->ibr_obj.ibr_obj_val == NULL)
 479     {
 480       nis_free_request (ibreq);
 481       NIS_RES_STATUS (res) = NIS_NOMEMORY;
 482       return res;
 483     }
 484   ibreq->ibr_obj.ibr_obj_len = 1;
 485
 486   if ((status = __do_niscall (ibreq->ibr_name, NIS_IBADD,
 487                               (xdrproc_t) _xdr_ib_request,
 488                               (caddr_t) ibreq,
 489                               (xdrproc_t) _xdr_nis_result,
 490                               (caddr_t) res, 0, NULL)) != NIS_SUCCESS)
 491     NIS_RES_STATUS (res) = status;
 492
 493   nis_free_request (ibreq);
 494
 495   return res;
 496 }
 497
 498 nis_result *
 499 nis_modify_entry (const_nis_name name, const nis_object *obj2,
 500                   unsigned int flags)
 501 {
 502   nis_object obj;
 503   nis_result *res;
 504   nis_error status;
 505   ib_request *ibreq;
 506   size_t namelen = strlen (name);
 507   char buf1[namelen + 20];
 508   char buf4[namelen + 20];
 509
 510   res = calloc (1, sizeof (nis_result));
 511   if (res == NULL)
 512     return NULL;
 513
 514   if (( ibreq =__create_ib_request (name, flags)) == NULL)
 515     {
 516       NIS_RES_STATUS (res) = NIS_BADNAME;
 517       return res;
 518     }
 519
 520   memcpy (&obj, obj2, sizeof (nis_object));
 521
 522   if (obj.zo_name == NULL || strlen (obj.zo_name) == 0)
 523     obj.zo_name = nis_leaf_of_r (name, buf1, sizeof (buf1));
 524
 525   if (obj.zo_owner == NULL || strlen (obj.zo_owner) == 0)
 526     obj.zo_owner = nis_local_principal ();
 527
 528   if (obj.zo_group == NULL || strlen (obj.zo_group) == 0)
 529     obj.zo_group = nis_local_group ();
 530
 531   obj.zo_domain = nis_domain_of_r (name, buf4, sizeof (buf4));
 532
 533   ibreq->ibr_obj.ibr_obj_val = nis_clone_object (&obj, NULL);
 534   if (ibreq->ibr_obj.ibr_obj_val == NULL)
 535     {
 536       nis_free_request (ibreq);
 537       NIS_RES_STATUS (res) = NIS_NOMEMORY;
 538       return res;
 539     }
 540   ibreq->ibr_obj.ibr_obj_len = 1;
 541
 542   if ((status = __do_niscall (ibreq->ibr_name, NIS_IBMODIFY,
 543                               (xdrproc_t) _xdr_ib_request,
 544                               (caddr_t) ibreq, (xdrproc_t) _xdr_nis_result,
 545                               (caddr_t) res, 0, NULL)) != NIS_SUCCESS)
 546     NIS_RES_STATUS (res) = status;
 547
 548   nis_free_request (ibreq);
 549
 550   return res;
 551 }
 552
 553 nis_result *
 554 nis_remove_entry (const_nis_name name, const nis_object *obj,
 555                   unsigned int flags)
 556 {
 557   nis_result *res;
 558   ib_request *ibreq;
 559   nis_error status;
 560
 561   res = calloc (1, sizeof (nis_result));
 562   if (res == NULL)
 563     return NULL;
 564
 565   if (name == NULL)
 566     {
 567       NIS_RES_STATUS (res) = NIS_BADNAME;
 568       return res;
 569     }
 570
 571   if ((ibreq =__create_ib_request (name, flags)) == NULL)
 572     {
 573       NIS_RES_STATUS (res) = NIS_BADNAME;
 574       return res;
 575     }
 576
 577   if (obj != NULL)
 578     {
 579       ibreq->ibr_obj.ibr_obj_val = nis_clone_object (obj, NULL);
 580       if (ibreq->ibr_obj.ibr_obj_val == NULL)
 581         {
 582           nis_free_request (ibreq);
 583           NIS_RES_STATUS (res) = NIS_NOMEMORY;
 584           return res;
 585         }
 586       ibreq->ibr_obj.ibr_obj_len = 1;
 587     }
 588
 589   if ((status = __do_niscall (ibreq->ibr_name, NIS_IBREMOVE,
 590                               (xdrproc_t) _xdr_ib_request,
 591                               (caddr_t) ibreq, (xdrproc_t) _xdr_nis_result,
 592                               (caddr_t) res, 0, NULL)) != NIS_SUCCESS)
 593     NIS_RES_STATUS (res) = status;
 594
 595   nis_free_request (ibreq);
 596
 597   return res;
 598 }
 599
 600 nis_result *
 601 nis_first_entry (const_nis_name name)
 602 {
 603   nis_result *res;
 604   ib_request *ibreq;
 605   nis_error status;
 606
 607   res = calloc (1, sizeof (nis_result));
 608   if (res == NULL)
 609     return NULL;
 610
 611   if (name == NULL)
 612     {
 613       NIS_RES_STATUS (res) = NIS_BADNAME;
 614       return res;
 615     }
 616
 617   ibreq = __create_ib_request (name, 0);
 618   if (ibreq == NULL)
 619     {
 620       NIS_RES_STATUS (res) = NIS_BADNAME;
 621       return res;
 622     }
 623
 624   status = __do_niscall (ibreq->ibr_name, NIS_IBFIRST,
 625                          (xdrproc_t) _xdr_ib_request,
 626                          (caddr_t) ibreq, (xdrproc_t) _xdr_nis_result,
 627                          (caddr_t) res, 0, NULL);
 628
 629   if (status != NIS_SUCCESS)
 630     NIS_RES_STATUS (res) = status;
 631
 632   nis_free_request (ibreq);
 633
 634   return res;
 635 }
 636
 637 nis_result *
 638 nis_next_entry (const_nis_name name, const netobj *cookie)
 639 {
 640   nis_result *res;
 641   ib_request *ibreq;
 642   nis_error status;
 643
 644   res = calloc (1, sizeof (nis_result));
 645   if (res == NULL)
 646     return NULL;
 647
 648   if (name == NULL)
 649     {
 650       NIS_RES_STATUS (res) = NIS_BADNAME;
 651       return res;
 652     }
 653
 654   ibreq = __create_ib_request (name, 0);
 655   if (ibreq == NULL)
 656     {
 657       NIS_RES_STATUS (res) = NIS_BADNAME;
 658       return res;
 659     }
 660
 661   if (cookie != NULL)
 662     {
 663       ibreq->ibr_cookie.n_bytes = cookie->n_bytes;
 664       ibreq->ibr_cookie.n_len = cookie->n_len;
 665     }
 666
 667   status = __do_niscall (ibreq->ibr_name, NIS_IBNEXT,
 668                          (xdrproc_t) _xdr_ib_request,
 669                          (caddr_t) ibreq, (xdrproc_t) _xdr_nis_result,
 670                          (caddr_t) res, 0, NULL);
 671
 672   if (status != NIS_SUCCESS)
 673     NIS_RES_STATUS (res) = status;
 674
 675   if (cookie != NULL)
 676     {
 677       /* Don't give cookie free, it is not from us */
 678       ibreq->ibr_cookie.n_bytes = NULL;
 679       ibreq->ibr_cookie.n_len = 0;
 680     }
 681
 682   nis_free_request (ibreq);
 683
 684   return res;
 685 }