nis/nis_verifygroup.c

   1 /* Copyright (c) 1997-2021 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 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, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <string.h>
  20 #include <rpcsvc/nis.h>
  21 #include <shlib-compat.h>
  22
  23 nis_error
  24 nis_verifygroup (const_nis_name group)
  25 {
  26   if (group != NULL && group[0] != '\0')
  27     {
  28       size_t grouplen = strlen (group);
  29       char buf[grouplen + 50];
  30       char leafbuf[grouplen + 2];
  31       char domainbuf[grouplen + 2];
  32       nis_result *res;
  33       nis_error status;
  34       char *cp, *cp2;
  35
  36       cp = stpcpy (buf, nis_leaf_of_r (group, leafbuf, sizeof (leafbuf) - 1));
  37       cp = stpcpy (cp, ".groups_dir");
  38       cp2 = nis_domain_of_r (group, domainbuf, sizeof (domainbuf) - 1);
  39       if (cp2 != NULL && cp2[0] != '\0')
  40         {
  41           *cp++ = '.';
  42           stpcpy (cp, cp2);
  43         }
  44       res = nis_lookup (buf, 0);
  45       status = NIS_RES_STATUS (res);
  46       nis_freeresult (res);
  47       return status;
  48     }
  49   else
  50     return NIS_FAIL;
  51 }
  52 libnsl_hidden_nolink_def (nis_verifygroup, GLIBC_2_1)