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acl_create_entry.c

/*
  File: acl_create_entry.c

  Copyright (C) 1999, 2000
  Andreas Gruenbacher <a.gruenbacher@computer.org>

  This program is free software; you can redistribute it and/or
  modify it under the terms of the GNU Library General Public
  License as published by the Free Software Foundation; either
  version 2 of the License, or (at your option) any later version.

  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  Library General Public License for more details.

  You should have received a copy of the GNU Library General Public
  License along with this library; if not, write to the Free Software
  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/

#include "libacl.h"


acl_entry_obj *
__acl_create_entry_obj(acl_obj *acl_obj_p)
{
      acl_entry_obj *entry_obj_p;

      if (acl_obj_p->aprealloc == acl_obj_p->aprealloc_end) {
            entry_obj_p = new_obj_p(acl_entry);
            if (!entry_obj_p)
                  return NULL;
      } else {
            entry_obj_p = --acl_obj_p->aprealloc_end;
            new_obj_p_here(acl_entry, entry_obj_p);
      }
      acl_obj_p->aused++;

      /* Insert at the end of the entry ring */
      entry_obj_p->eprev = acl_obj_p->aprev;
      entry_obj_p->enext = (acl_entry_obj *)acl_obj_p;
      entry_obj_p->eprev->enext = entry_obj_p;
      entry_obj_p->enext->eprev = entry_obj_p;
      
      entry_obj_p->econtainer = acl_obj_p;
      init_acl_entry_obj(*entry_obj_p);

      return entry_obj_p;
}

/* 23.4.7 */
int
acl_create_entry(acl_t *acl_p, acl_entry_t *entry_p)
{
      acl_obj *acl_obj_p;
      acl_entry_obj *entry_obj_p;
      if (!acl_p || !entry_p) {
            if (entry_p)
                  *entry_p = NULL;
            errno = EINVAL;
            return -1;
      }
      acl_obj_p = ext2int(acl, *acl_p);
      if (!acl_obj_p)
            return -1;
      entry_obj_p = __acl_create_entry_obj(acl_obj_p);
      if (entry_obj_p == NULL)
            return -1;
      *entry_p = int2ext(entry_obj_p);
      return 0;
}


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