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glibc  2.9
Functions
nis_table.c File Reference
#include <assert.h>
#include <string.h>
#include <rpcsvc/nis.h>
#include "nis_xdr.h"
#include "nis_intern.h"
#include "libnsl.h"

Go to the source code of this file.

Functions

struct ib_request * __create_ib_request (const_nis_name name, unsigned int flags)
 libnsl_hidden_def (__create_ib_request)
static char * get_tablepath (char *name, dir_binding *bptr)
nis_error __follow_path (char **tablepath, char **tableptr, struct ib_request *ibreq, dir_binding *bptr)
 libnsl_hidden_def (__follow_path)
 libnsl_hidden_def (nis_list)
nis_result * nis_modify_entry (const_nis_name name, const nis_object *obj2, unsigned int flags)
nis_result * nis_remove_entry (const_nis_name name, const nis_object *obj, unsigned int flags)
nis_result * nis_first_entry (const_nis_name name)
nis_result * nis_next_entry (const_nis_name name, const netobj *cookie)

Function Documentation

struct ib_request* __create_ib_request ( const_nis_name  name,
unsigned int  flags 
) [read]

Definition at line 31 of file nis_table.c.

{
  struct ib_request *ibreq = calloc (1, sizeof (struct ib_request));
  nis_attr *search_val = NULL;
  size_t search_len = 0;
  size_t size = 0;

  if (ibreq == NULL)
    return NULL;

  ibreq->ibr_flags = flags;

  char *cptr = strdupa (name);

  /* Not of "[key=value,key=value,...],foo.." format? */
  if (cptr[0] != '[')
    {
      ibreq->ibr_name = strdup (cptr);
      if (ibreq->ibr_name == NULL)
       {
         free (ibreq);
         return NULL;
       }
      return ibreq;
    }

  /* "[key=value,...],foo" format */
  ibreq->ibr_name = strchr (cptr, ']');
  if (ibreq->ibr_name == NULL || ibreq->ibr_name[1] != ',')
    {
      /* The object has not really been built yet so we use free.  */
      free (ibreq);
      return NULL;
    }

  /* Check if we have an entry of "[key=value,],bar".  If, remove the "," */
  if (ibreq->ibr_name[-1] == ',')
    ibreq->ibr_name[-1] = '\0';
  else
    ibreq->ibr_name[0] = '\0';
  ibreq->ibr_name += 2;
  ibreq->ibr_name = strdup (ibreq->ibr_name);
  if (ibreq->ibr_name == NULL)
    {
    free_null:
      while (search_len-- > 0)
       {
         free (search_val[search_len].zattr_ndx);
         free (search_val[search_len].zattr_val.zattr_val_val);
       }
      free (search_val);
      nis_free_request (ibreq);
      return NULL;
    }

  ++cptr; /* Remove "[" */

  while (cptr != NULL && cptr[0] != '\0')
    {
      char *key = cptr;
      char *val = strchr (cptr, '=');

      cptr = strchr (key, ',');
      if (cptr != NULL)
       *cptr++ = '\0';

      if (__builtin_expect (val == NULL, 0))
       {
         nis_free_request (ibreq);
         return NULL;
       }
      *val++ = '\0';
      if (search_len + 1 >= size)
        {
          size += 1;
         nis_attr *newp = realloc (search_val, size * sizeof (nis_attr));
         if (newp == NULL)
           goto free_null;
         search_val = newp;
       }
      search_val[search_len].zattr_ndx = strdup (key);
      if (search_val[search_len].zattr_ndx == NULL)
       goto free_null;

      search_val[search_len].zattr_val.zattr_val_len = strlen (val) + 1;
      search_val[search_len].zattr_val.zattr_val_val = strdup (val);
      if (search_val[search_len].zattr_val.zattr_val_val == NULL)
       {
         free (search_val[search_len].zattr_ndx);
         goto free_null;
       }

      ++search_len;
    }

  ibreq->ibr_srch.ibr_srch_val = search_val;
  ibreq->ibr_srch.ibr_srch_len = search_len;

  return ibreq;
}

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nis_error __follow_path ( char **  tablepath,
char **  tableptr,
struct ib_request *  ibreq,
dir_binding *  bptr 
)

Definition at line 169 of file nis_table.c.

{
  if (*tablepath == NULL)
    {
      *tablepath = get_tablepath (ibreq->ibr_name, bptr);
      if (*tablepath == NULL)
       return NIS_NOMEMORY;

      *tableptr = *tablepath;
    }
  if (*tableptr == NULL)
    return NIS_NOTFOUND;

  char *newname = strsep (tableptr, ":");
  if (newname[0] == '\0')
    return NIS_NOTFOUND;

  newname = strdup (newname);
  if (newname == NULL)
    return NIS_NOMEMORY;

  free (ibreq->ibr_name);
  ibreq->ibr_name = newname;

  return NIS_SUCCESS;
}

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static char* get_tablepath ( char *  name,
dir_binding *  bptr 
) [static]

Definition at line 136 of file nis_table.c.

{
  enum clnt_stat result;
  nis_result res;
  struct ns_request req;

  memset (&res, '\0', sizeof (res));

  req.ns_name = name;
  req.ns_object.ns_object_len = 0;
  req.ns_object.ns_object_val = NULL;

  result = clnt_call (bptr->clnt, NIS_LOOKUP, (xdrproc_t) _xdr_ns_request,
                    (caddr_t) &req, (xdrproc_t) _xdr_nis_result,
                    (caddr_t) &res, RPCTIMEOUT);

  const char *cptr;
  if (result == RPC_SUCCESS && NIS_RES_STATUS (&res) == NIS_SUCCESS
      && __type_of (NIS_RES_OBJECT (&res)) == NIS_TABLE_OBJ)
    cptr = NIS_RES_OBJECT (&res)->TA_data.ta_path;
  else
    cptr = "";

  char *str = strdup (cptr);

  if (result == RPC_SUCCESS)
    xdr_free ((xdrproc_t) _xdr_nis_result, (char *) &res);

  return str;
}

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Definition at line 131 of file nis_table.c.

                                         {10, 0};

Definition at line 196 of file nis_table.c.

{
  nis_result *res = malloc (sizeof (nis_result));
  ib_request *ibreq;
  int status;
  enum clnt_stat clnt_status;
  int count_links = 0;             /* We will only follow NIS_MAXLINKS links! */
  int done = 0;
  nis_name *names;
  nis_name namebuf[2] = {NULL, NULL};
  int name_nr = 0;
  nis_cb *cb = NULL;
  char *tableptr;
  char *tablepath = NULL;
  int first_try = 0; /* Do we try the old binding at first ? */
  nis_result *allres = NULL;

  if (res == NULL)
    return NULL;

  if (name == NULL)
    {
      status = NIS_BADNAME;
    err_out:
      nis_freeresult (allres);
      memset (res, '\0', sizeof (nis_result));
      NIS_RES_STATUS (res) = status;
      return res;
    }

  ibreq = __create_ib_request (name, flags);
  if (ibreq == NULL)
    {
      status = NIS_BADNAME;
      goto err_out;
    }

  if ((flags & EXPAND_NAME)
      && ibreq->ibr_name[strlen (ibreq->ibr_name) - 1] != '.')
    {
      names = nis_getnames (ibreq->ibr_name);
      free (ibreq->ibr_name);
      ibreq->ibr_name = NULL;
      if (names == NULL)
       {
         nis_free_request (ibreq);
         status = NIS_BADNAME;
         goto err_out;
       }
      ibreq->ibr_name = strdup (names[name_nr]);
      if (ibreq->ibr_name == NULL)
       {
         nis_freenames (names);
         nis_free_request (ibreq);
         status = NIS_NOMEMORY;
         goto err_out;
       }
    }
  else
    {
      names = namebuf;
      names[name_nr] = ibreq->ibr_name;
    }

  cb = NULL;

  while (!done)
    {
      dir_binding bptr;
      directory_obj *dir = NULL;

      memset (res, '\0', sizeof (nis_result));

      status = __nisfind_server (ibreq->ibr_name,
                             ibreq->ibr_srch.ibr_srch_val != NULL,
                             &dir, &bptr, flags & ~MASTER_ONLY);
      if (status != NIS_SUCCESS)
       {
          NIS_RES_STATUS (res) = status;
          goto fail3;
       }

      while (__nisbind_connect (&bptr) != NIS_SUCCESS)
       if (__builtin_expect (__nisbind_next (&bptr) != NIS_SUCCESS, 0))
         {
           NIS_RES_STATUS (res) = NIS_NAMEUNREACHABLE;
           goto fail;
         }

      if (callback != NULL)
       {
         assert (cb == NULL);
         cb = __nis_create_callback (callback, userdata, flags);
         ibreq->ibr_cbhost.ibr_cbhost_len = 1;
         ibreq->ibr_cbhost.ibr_cbhost_val = cb->serv;
       }

    again:
      clnt_status = clnt_call (bptr.clnt, NIS_IBLIST,
                            (xdrproc_t) _xdr_ib_request, (caddr_t) ibreq,
                            (xdrproc_t) _xdr_nis_result,
                            (caddr_t) res, RPCTIMEOUT);

      if (__builtin_expect (clnt_status != RPC_SUCCESS, 0))
       NIS_RES_STATUS (res) = NIS_RPCERROR;
      else
       switch (NIS_RES_STATUS (res))
         { /* start switch */
         case NIS_PARTIAL:
         case NIS_SUCCESS:
         case NIS_S_SUCCESS:
           if (__type_of (NIS_RES_OBJECT (res)) == NIS_LINK_OBJ
              && (flags & FOLLOW_LINKS))  /* We are following links.  */
             {
              free (ibreq->ibr_name);
              ibreq->ibr_name = NULL;
              /* If we hit the link limit, bail.  */
              if (__builtin_expect (count_links > NIS_MAXLINKS, 0))
                {
                  NIS_RES_STATUS (res) = NIS_LINKNAMEERROR;
                  ++done;
                  break;
                }
              ++count_links;
              ibreq->ibr_name =
                strdup (NIS_RES_OBJECT (res)->LI_data.li_name);
              if (ibreq->ibr_name == NULL)
                {
                  NIS_RES_STATUS (res) = NIS_NOMEMORY;
                fail:
                  __nisbind_destroy (&bptr);
                  nis_free_directory (dir);
                fail3:
                  free (tablepath);
                  if (cb)
                    {
                     __nis_destroy_callback (cb);
                     ibreq->ibr_cbhost.ibr_cbhost_len = 0;
                     ibreq->ibr_cbhost.ibr_cbhost_val = NULL;
                    }
                  if (names != namebuf)
                    nis_freenames (names);
                  nis_free_request (ibreq);
                  nis_freeresult (allres);
                  return res;
                }
              if (NIS_RES_OBJECT (res)->LI_data.li_attrs.li_attrs_len)
                if (ibreq->ibr_srch.ibr_srch_len == 0)
                  {
                    ibreq->ibr_srch.ibr_srch_len =
                     NIS_RES_OBJECT (res)->LI_data.li_attrs.li_attrs_len;
                    ibreq->ibr_srch.ibr_srch_val =
                     NIS_RES_OBJECT (res)->LI_data.li_attrs.li_attrs_val;
                  }
              /* The following is a non-obvious optimization.  A
                 nis_freeresult call would call xdr_free as the
                 following code.  But it also would unnecessarily
                 free the result structure.  We avoid this here
                 along with the necessary tests.  */
              xdr_free ((xdrproc_t) _xdr_nis_result, (char *)res);
              memset (res, '\0', sizeof (*res));
              first_try = 1; /* Try at first the old binding */
              goto again;
             }
           else if ((flags & FOLLOW_PATH)
                   && NIS_RES_STATUS (res) == NIS_PARTIAL)
             {
              clnt_status = __follow_path (&tablepath, &tableptr, ibreq,
                                        &bptr);
              if (clnt_status != NIS_SUCCESS)
                {
                  if (clnt_status == NIS_NOMEMORY)
                    NIS_RES_STATUS (res) = clnt_status;
                  ++done;
                }
              else
                {
                  /* The following is a non-obvious optimization.  A
                     nis_freeresult call would call xdr_free as the
                     following code.  But it also would unnecessarily
                     free the result structure.  We avoid this here
                     along with the necessary tests.  */
                  xdr_free ((xdrproc_t) _xdr_nis_result, (char *) res);
                  memset (res, '\0', sizeof (*res));
                  first_try = 1;
                  goto again;
                }
             }
           else if ((flags & (FOLLOW_PATH | ALL_RESULTS))
                   == (FOLLOW_PATH | ALL_RESULTS))
             {
              if (allres == NULL)
                {
                  allres = res;
                  res = malloc (sizeof (nis_result));
                  if (res == NULL)
                    {
                     res = allres;
                     allres = NULL;
                     NIS_RES_STATUS (res) = NIS_NOMEMORY;
                     goto fail;
                    }
                  NIS_RES_STATUS (res) = NIS_RES_STATUS (allres);
                }
              else
                {
                  nis_object *objects_val
                    = realloc (NIS_RES_OBJECT (allres),
                             (NIS_RES_NUMOBJ (allres)
                              + NIS_RES_NUMOBJ (res))
                             * sizeof (nis_object));
                  if (objects_val == NULL)
                    {
                     NIS_RES_STATUS (res) = NIS_NOMEMORY;
                     goto fail;
                    }
                  NIS_RES_OBJECT (allres) = objects_val;
                  memcpy (NIS_RES_OBJECT (allres) + NIS_RES_NUMOBJ (allres),
                         NIS_RES_OBJECT (res),
                         NIS_RES_NUMOBJ (res) * sizeof (nis_object));
                  NIS_RES_NUMOBJ (allres) += NIS_RES_NUMOBJ (res);
                  NIS_RES_NUMOBJ (res) = 0;
                  free (NIS_RES_OBJECT (res));
                  NIS_RES_OBJECT (res) = NULL;
                  NIS_RES_STATUS (allres) = NIS_RES_STATUS (res);
                  xdr_free ((xdrproc_t) _xdr_nis_result, (char *) res);
                }
              clnt_status = __follow_path (&tablepath, &tableptr, ibreq,
                                        &bptr);
              if (clnt_status != NIS_SUCCESS)
                {
                  /* Prepare for the nis_freeresult call.  */
                  memset (res, '\0', sizeof (*res));

                  if (clnt_status == NIS_NOMEMORY)
                    NIS_RES_STATUS (allres) = clnt_status;
                  ++done;
                }
             }
           else
             ++done;
           break;
         case NIS_CBRESULTS:
           if (cb != NULL)
             {
              __nis_do_callback (&bptr, &res->cookie, cb);
              NIS_RES_STATUS (res) = cb->result;

              if (!(flags & ALL_RESULTS))
                ++done;
              else
                {
                  clnt_status
                    = __follow_path (&tablepath, &tableptr, ibreq, &bptr);
                  if (clnt_status != NIS_SUCCESS)
                    {
                     if (clnt_status == NIS_NOMEMORY)
                       NIS_RES_STATUS (res) = clnt_status;
                     ++done;
                    }
                }
             }
           break;
         case NIS_SYSTEMERROR:
         case NIS_NOSUCHNAME:
         case NIS_NOT_ME:
           /* If we had first tried the old binding, do nothing, but
              get a new binding */
           if (!first_try)
             {
              if (__nisbind_next (&bptr) != NIS_SUCCESS)
                {
                  ++done;
                  break; /* No more servers to search */
                }
              while (__nisbind_connect (&bptr) != NIS_SUCCESS)
                {
                  if (__nisbind_next (&bptr) != NIS_SUCCESS)
                    {
                     ++done;
                     break; /* No more servers to search */
                    }
                }
              goto again;
             }
           break;
         default:
           if (!first_try)
             {
              /* Try the next domainname if we don't follow a link.  */
              free (ibreq->ibr_name);
              ibreq->ibr_name = NULL;
              if (__builtin_expect (count_links, 0))
                {
                  NIS_RES_STATUS (res) = NIS_LINKNAMEERROR;
                  ++done;
                  break;
                }
              ++name_nr;
              if (names[name_nr] == NULL)
                {
                  ++done;
                  break;
                }
              ibreq->ibr_name = strdup (names[name_nr]);
              if (ibreq->ibr_name == NULL)
                {
                  NIS_RES_STATUS (res) = NIS_NOMEMORY;
                  goto fail;
                }
              first_try = 1; /* Try old binding at first */
              goto again;
             }
           break;
         }
      first_try = 0;

      if (cb)
       {
         __nis_destroy_callback (cb);
         ibreq->ibr_cbhost.ibr_cbhost_len = 0;
         ibreq->ibr_cbhost.ibr_cbhost_val = NULL;
         cb = NULL;
       }

      __nisbind_destroy (&bptr);
      nis_free_directory (dir);
    }

  free (tablepath);

  if (names != namebuf)
    nis_freenames (names);

  nis_free_request (ibreq);

  if (allres)
    {
      nis_freeresult (res);
      return allres;
    }

  return res;
}

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Definition at line 548 of file nis_table.c.

{
  nis_result *res = calloc (1, sizeof (nis_result));
  if (res == NULL)
    return NULL;

  if (name == NULL)
    {
      NIS_RES_STATUS (res) = NIS_BADNAME;
      return res;
    }

  ib_request *ibreq = __create_ib_request (name, flags);
  if (ibreq == NULL)
    {
      NIS_RES_STATUS (res) = NIS_BADNAME;
      return res;
    }

  nis_object obj;
  memcpy (&obj, obj2, sizeof (nis_object));

  size_t namelen = strlen (name);
  char buf1[namelen + 20];
  char buf4[namelen + 20];

  if (obj.zo_name == NULL || strlen (obj.zo_name) == 0)
    obj.zo_name = nis_leaf_of_r (name, buf1, sizeof (buf1));

  if (obj.zo_owner == NULL || strlen (obj.zo_owner) == 0)
    obj.zo_owner = nis_local_principal ();

  if (obj.zo_group == NULL || strlen (obj.zo_group) == 0)
    obj.zo_group = nis_local_group ();

  obj.zo_domain = nis_domain_of_r (name, buf4, sizeof (buf4));

  ibreq->ibr_obj.ibr_obj_val = nis_clone_object (&obj, NULL);
  if (ibreq->ibr_obj.ibr_obj_val == NULL)
    {
      nis_free_request (ibreq);
      NIS_RES_STATUS (res) = NIS_NOMEMORY;
      return res;
    }
  ibreq->ibr_obj.ibr_obj_len = 1;

  nis_error status = __do_niscall (ibreq->ibr_name, NIS_IBADD,
                               (xdrproc_t) _xdr_ib_request,
                               (caddr_t) ibreq,
                               (xdrproc_t) _xdr_nis_result,
                               (caddr_t) res, 0, NULL);
  if (__builtin_expect (status != NIS_SUCCESS, 0))
    NIS_RES_STATUS (res) = status;

  nis_free_request (ibreq);

  return res;
}

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nis_result* nis_first_entry ( const_nis_name  name)

Definition at line 716 of file nis_table.c.

{
  nis_result *res;
  ib_request *ibreq;
  nis_error status;

  res = calloc (1, sizeof (nis_result));
  if (res == NULL)
    return NULL;

  if (name == NULL)
    {
      NIS_RES_STATUS (res) = NIS_BADNAME;
      return res;
    }

  ibreq = __create_ib_request (name, 0);
  if (ibreq == NULL)
    {
      NIS_RES_STATUS (res) = NIS_BADNAME;
      return res;
    }

  status = __do_niscall (ibreq->ibr_name, NIS_IBFIRST,
                      (xdrproc_t) _xdr_ib_request,
                      (caddr_t) ibreq, (xdrproc_t) _xdr_nis_result,
                      (caddr_t) res, 0, NULL);

  if (__builtin_expect (status != NIS_SUCCESS, 0))
    NIS_RES_STATUS (res) = status;

  nis_free_request (ibreq);

  return res;
}

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nis_result* nis_modify_entry ( const_nis_name  name,
const nis_object *  obj2,
unsigned int  flags 
)

Definition at line 611 of file nis_table.c.

{
  nis_object obj;
  nis_result *res;
  nis_error status;
  ib_request *ibreq;
  size_t namelen = strlen (name);
  char buf1[namelen + 20];
  char buf4[namelen + 20];

  res = calloc (1, sizeof (nis_result));
  if (res == NULL)
    return NULL;

  ibreq = __create_ib_request (name, flags);
  if (ibreq == NULL)
    {
      NIS_RES_STATUS (res) = NIS_BADNAME;
      return res;
    }

  memcpy (&obj, obj2, sizeof (nis_object));

  if (obj.zo_name == NULL || strlen (obj.zo_name) == 0)
    obj.zo_name = nis_leaf_of_r (name, buf1, sizeof (buf1));

  if (obj.zo_owner == NULL || strlen (obj.zo_owner) == 0)
    obj.zo_owner = nis_local_principal ();

  if (obj.zo_group == NULL || strlen (obj.zo_group) == 0)
    obj.zo_group = nis_local_group ();

  obj.zo_domain = nis_domain_of_r (name, buf4, sizeof (buf4));

  ibreq->ibr_obj.ibr_obj_val = nis_clone_object (&obj, NULL);
  if (ibreq->ibr_obj.ibr_obj_val == NULL)
    {
      nis_free_request (ibreq);
      NIS_RES_STATUS (res) = NIS_NOMEMORY;
      return res;
    }
  ibreq->ibr_obj.ibr_obj_len = 1;

  status = __do_niscall (ibreq->ibr_name, NIS_IBMODIFY,
                      (xdrproc_t) _xdr_ib_request,
                      (caddr_t) ibreq, (xdrproc_t) _xdr_nis_result,
                      (caddr_t) res, 0, NULL);
  if (__builtin_expect (status != NIS_SUCCESS, 0))
    NIS_RES_STATUS (res) = status;

  nis_free_request (ibreq);

  return res;
}

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nis_result* nis_next_entry ( const_nis_name  name,
const netobj cookie 
)

Definition at line 753 of file nis_table.c.

{
  nis_result *res;
  ib_request *ibreq;
  nis_error status;

  res = calloc (1, sizeof (nis_result));
  if (res == NULL)
    return NULL;

  if (name == NULL)
    {
      NIS_RES_STATUS (res) = NIS_BADNAME;
      return res;
    }

  ibreq = __create_ib_request (name, 0);
  if (ibreq == NULL)
    {
      NIS_RES_STATUS (res) = NIS_BADNAME;
      return res;
    }

  if (cookie != NULL)
    {
      ibreq->ibr_cookie.n_bytes = cookie->n_bytes;
      ibreq->ibr_cookie.n_len = cookie->n_len;
    }

  status = __do_niscall (ibreq->ibr_name, NIS_IBNEXT,
                      (xdrproc_t) _xdr_ib_request,
                      (caddr_t) ibreq, (xdrproc_t) _xdr_nis_result,
                      (caddr_t) res, 0, NULL);

  if (__builtin_expect (status != NIS_SUCCESS, 0))
    NIS_RES_STATUS (res) = status;

  if (cookie != NULL)
    {
      /* Don't give cookie free, it is not from us */
      ibreq->ibr_cookie.n_bytes = NULL;
      ibreq->ibr_cookie.n_len = 0;
    }

  nis_free_request (ibreq);

  return res;
}

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nis_result* nis_remove_entry ( const_nis_name  name,
const nis_object *  obj,
unsigned int  flags 
)

Definition at line 668 of file nis_table.c.

{
  nis_result *res;
  ib_request *ibreq;
  nis_error status;

  res = calloc (1, sizeof (nis_result));
  if (res == NULL)
    return NULL;

  if (name == NULL)
    {
      NIS_RES_STATUS (res) = NIS_BADNAME;
      return res;
    }

  ibreq = __create_ib_request (name, flags);
  if (ibreq == NULL)
    {
      NIS_RES_STATUS (res) = NIS_BADNAME;
      return res;
    }

  if (obj != NULL)
    {
      ibreq->ibr_obj.ibr_obj_val = nis_clone_object (obj, NULL);
      if (ibreq->ibr_obj.ibr_obj_val == NULL)
       {
         nis_free_request (ibreq);
         NIS_RES_STATUS (res) = NIS_NOMEMORY;
         return res;
       }
      ibreq->ibr_obj.ibr_obj_len = 1;
    }

  if ((status = __do_niscall (ibreq->ibr_name, NIS_IBREMOVE,
                           (xdrproc_t) _xdr_ib_request,
                           (caddr_t) ibreq, (xdrproc_t) _xdr_nis_result,
                           (caddr_t) res, 0, NULL)) != NIS_SUCCESS)
    NIS_RES_STATUS (res) = status;

  nis_free_request (ibreq);

  return res;
}

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