nis/nis_addmember.c

   1 /* Copyright (c) 1997, 1998, 1999, 2004 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, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #include <assert.h>
  21 #include <string.h>
  22 #include <rpcsvc/nis.h>
  23
  24 nis_error
  25 nis_addmember (const_nis_name member, const_nis_name group)
  26 {
  27   if (group != NULL && group[0] != '\0')
  28     {
  29       size_t grouplen = strlen (group);
  30       char buf[grouplen + 14 + NIS_MAXNAMELEN];
  31       char leafbuf[grouplen + 2];
  32       char domainbuf[grouplen + 2];
  33       nis_result *res, *res2;
  34       nis_error status;
  35       char *cp, *cp2;
  36
  37       cp = stpcpy (buf, nis_leaf_of_r (group, leafbuf, sizeof (leafbuf) - 1));
  38       cp = stpcpy (cp, ".groups_dir");
  39       cp2 = nis_domain_of_r (group, domainbuf, sizeof (domainbuf) - 1);
  40       if (cp2 != NULL && cp2[0] != '\0')
  41         {
  42           *cp++ = '.';
  43           stpcpy (cp, cp2);
  44         }
  45       res = nis_lookup (buf, FOLLOW_LINKS|EXPAND_NAME);
  46       if (NIS_RES_STATUS (res) != NIS_SUCCESS)
  47         {
  48           status = NIS_RES_STATUS (res);
  49           nis_freeresult (res);
  50           return status;
  51         }
  52       if ((NIS_RES_NUMOBJ (res)  != 1) ||
  53           (__type_of (NIS_RES_OBJECT (res)) != NIS_GROUP_OBJ))
  54         {
  55           nis_freeresult (res);
  56           return NIS_INVALIDOBJ;
  57         }
  58
  59       NIS_RES_OBJECT (res)->GR_data.gr_members.gr_members_val
  60         = realloc (NIS_RES_OBJECT (res)->GR_data.gr_members.gr_members_val,
  61                    (NIS_RES_OBJECT(res)->GR_data.gr_members.gr_members_len + 1)
  62                    * sizeof (char *));
  63       if (NIS_RES_OBJECT (res)->GR_data.gr_members.gr_members_val == NULL)
  64         goto nomem_out;
  65       NIS_RES_OBJECT (res)->GR_data.gr_members.gr_members_val[NIS_RES_OBJECT (res)->GR_data.gr_members.gr_members_len] = strdup (member);
  66       if (NIS_RES_OBJECT (res)->GR_data.gr_members.gr_members_val[NIS_RES_OBJECT (res)->GR_data.gr_members.gr_members_len] == NULL)
  67         {
  68           free (NIS_RES_OBJECT (res)->GR_data.gr_members.gr_members_val);
  69         nomem_out:
  70           nis_freeresult (res);
  71           return NIS_NOMEMORY;
  72         }
  73       ++NIS_RES_OBJECT (res)->GR_data.gr_members.gr_members_len;
  74
  75       /* Check the buffer bounds are not exceeded.  */
  76       assert (strlen (NIS_RES_OBJECT(res)->zo_name) + 1 < grouplen + 14);
  77       cp = stpcpy (buf, NIS_RES_OBJECT(res)->zo_name);
  78       *cp++ = '.';
  79       strncpy (cp, NIS_RES_OBJECT (res)->zo_domain, NIS_MAXNAMELEN);
  80       res2 = nis_modify (buf, NIS_RES_OBJECT (res));
  81       status = NIS_RES_STATUS (res2);
  82       nis_freeresult (res);
  83       nis_freeresult (res2);
  84
  85       return status;
  86     }
  87   else
  88     return NIS_FAIL;
  89 }