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acl_copy_int.c

/*
  File: acl_copy_int.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"


/* 23.4.6 */
acl_t
acl_copy_int(const void *buf_p)
{
      const struct __acl *ext_acl = (struct __acl *)buf_p;
      const struct __acl_entry *ent_p = ext_acl->x_entries, *end_p;
      size_t size = ext_acl ? ext_acl->x_size : 0;
      int entries;
      acl_obj *acl_obj_p;
      acl_entry_obj *entry_obj_p;

      if (!ext_acl || size < sizeof(struct __acl)) {
            errno = EINVAL;
            return NULL;
      }
      size -= sizeof(struct __acl);
      if (size % sizeof(struct __acl_entry)) {
            errno = EINVAL;
            return NULL;
      }
      entries = size / sizeof(struct __acl_entry);
      acl_obj_p = __acl_init_obj(entries);
      if (acl_obj_p == NULL)
            goto fail;
      end_p = ext_acl->x_entries + entries;
      for(; ent_p != end_p; ent_p++) {
            entry_obj_p = __acl_create_entry_obj(acl_obj_p);
            if (!entry_obj_p)
                  goto fail;
            /* XXX Convert to machine endianness */
            entry_obj_p->eentry = *ent_p;
      }
      if (__acl_reorder_obj_p(acl_obj_p))
            goto fail;
      return int2ext(acl_obj_p);

fail:
      __acl_free_acl_obj(acl_obj_p);
      return NULL;
}


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