1: /* Copyright (c) 1997, 1998, 1999, 2004, 2006 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 domainbuf[grouplen + 2];
   32:       nis_result *res, *res2;
   33:       nis_error status;
   34:       char *cp, *cp2;
   35: 
   36:       cp = rawmemchr (nis_leaf_of_r (group, buf, sizeof (buf) - 1), '\0');
   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, FOLLOW_LINKS | EXPAND_NAME);
   45:       if (NIS_RES_STATUS (res) != NIS_SUCCESS)
   46:         {
   47:           status = NIS_RES_STATUS (res);
   48:           nis_freeresult (res);
   49:           return status;
   50:         }
   51:       if (NIS_RES_NUMOBJ (res) != 1
   52:           || __type_of (NIS_RES_OBJECT (res)) != NIS_GROUP_OBJ)
   53:         {
   54:           nis_freeresult (res);
   55:           return NIS_INVALIDOBJ;
   56:         }
   57: 
   58:       u_int gr_members_len
   59:         = NIS_RES_OBJECT(res)->GR_data.gr_members.gr_members_len;
   60: 
   61:       nis_name *new_gr_members_val
   62:         = realloc (NIS_RES_OBJECT (res)->GR_data.gr_members.gr_members_val,
   63:                    (gr_members_len + 1) * sizeof (nis_name));
   64:       if (new_gr_members_val == NULL)
   65:         goto nomem_out;
   66: 
   67:       NIS_RES_OBJECT (res)->GR_data.gr_members.gr_members_val
   68:         = new_gr_members_val;
   69: 
   70:       new_gr_members_val[gr_members_len] = strdup (member);
   71:       if (new_gr_members_val[gr_members_len] == NULL)
   72:         {
   73:         nomem_out:
   74:           nis_freeresult (res);
   75:           return NIS_NOMEMORY;
   76:         }
   77:       ++NIS_RES_OBJECT (res)->GR_data.gr_members.gr_members_len;
   78: 
   79:       /* Check the buffer bounds are not exceeded.  */
   80:       assert (strlen (NIS_RES_OBJECT(res)->zo_name) + 1 < grouplen + 14);
   81:       cp = stpcpy (buf, NIS_RES_OBJECT(res)->zo_name);
   82:       *cp++ = '.';
   83:       strncpy (cp, NIS_RES_OBJECT (res)->zo_domain, NIS_MAXNAMELEN);
   84:       res2 = nis_modify (buf, NIS_RES_OBJECT (res));
   85:       status = NIS_RES_STATUS (res2);
   86:       nis_freeresult (res);
   87:       nis_freeresult (res2);
   88: 
   89:       return status;
   90:     }
   91:   else
   92:     return NIS_FAIL;
   93: }