1: /* Copyright (c) 1997,1998,1999,2004,2005,2006 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_removemember (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 = stpcpy (cp, ".");
   42:           stpcpy (cp, cp2);
   43:         }
   44:       res = nis_lookup (buf, FOLLOW_LINKS | EXPAND_NAME);
   45:       if (res == NULL)
   46:         return NIS_NOMEMORY;
   47:       if (NIS_RES_STATUS (res) != NIS_SUCCESS)
   48:         {
   49:           status = NIS_RES_STATUS (res);
   50:           nis_freeresult (res);
   51:           return status;
   52:         }
   53: 
   54:       if (NIS_RES_NUMOBJ (res) != 1
   55:           || __type_of (NIS_RES_OBJECT (res)) != NIS_GROUP_OBJ)
   56:         {
   57:           nis_freeresult (res);
   58:           return NIS_INVALIDOBJ;
   59:         }
   60: 
   61:       nis_name *gr_members_val
   62:         = NIS_RES_OBJECT(res)->GR_data.gr_members.gr_members_val;
   63:       u_int gr_members_len
   64:         = NIS_RES_OBJECT(res)->GR_data.gr_members.gr_members_len;
   65: 
   66:       u_int j = 0;
   67:       for (u_int i = 0; i < gr_members_len; ++i)
   68:         if (strcmp (gr_members_val[i], member) != 0)
   69:           gr_members_val[j++] = gr_members_val[i];
   70:         else
   71:           free (gr_members_val[i]);
   72: 
   73:       /* There is no need to reallocate the gr_members_val array.  We
   74:          just adjust the size to match the number of strings still in
   75:          it.  Yes, xdr_array will use mem_free with a size parameter
   76:          but this is mapped to a simple free call which determines the
   77:          size of the block by itself.  */
   78:       NIS_RES_OBJECT (res)->GR_data.gr_members.gr_members_len = j;
   79: 
   80:       cp = stpcpy (buf, NIS_RES_OBJECT (res)->zo_name);
   81:       *cp++ = '.';
   82:       strncpy (cp, NIS_RES_OBJECT (res)->zo_domain, NIS_MAXNAMELEN);
   83:       res2 = nis_modify (buf, NIS_RES_OBJECT (res));
   84:       status = NIS_RES_STATUS (res2);
   85:       nis_freeresult (res);
   86:       nis_freeresult (res2);
   87: 
   88:       return status;
   89:     }
   90:   else
   91:     return NIS_FAIL;
   92: }