nis/nis_verifygroup.c

   1 /* Copyright (c) 1997-2023 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <https://www.gnu.org/licenses/>.  */
  17
  18 #include <string.h>
  19 #include <rpcsvc/nis.h>
  20 #include <shlib-compat.h>
  21
  22 nis_error
  23 nis_verifygroup (const_nis_name group)
  24 {
  25   if (group != NULL && group[0] != '\0')
  26     {
  27       size_t grouplen = strlen (group);
  28       char buf[grouplen + 50];
  29       char leafbuf[grouplen + 2];
  30       char domainbuf[grouplen + 2];
  31       nis_result *res;
  32       nis_error status;
  33       char *cp, *cp2;
  34
  35       cp = stpcpy (buf, nis_leaf_of_r (group, leafbuf, sizeof (leafbuf) - 1));
  36       cp = stpcpy (cp, ".groups_dir");
  37       cp2 = nis_domain_of_r (group, domainbuf, sizeof (domainbuf) - 1);
  38       if (cp2 != NULL && cp2[0] != '\0')
  39         {
  40           *cp++ = '.';
  41           stpcpy (cp, cp2);
  42         }
  43       res = nis_lookup (buf, 0);
  44       status = NIS_RES_STATUS (res);
  45       nis_freeresult (res);
  46       return status;
  47     }
  48   else
  49     return NIS_FAIL;
  50 }
  51 libnsl_hidden_nolink_def (nis_verifygroup, GLIBC_2_1)