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__acl_to_xattr.c

/*
  File: __acl_to_xattr.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 <errno.h>
#include <sys/acl.h>
#include "libacl.h"

#include "byteorder.h"
#include "acl_ea.h"


char *
__acl_to_xattr(const acl_obj *acl_obj_p, size_t *size)
{
      const acl_entry_obj *entry_obj_p;
      acl_ea_header *ext_header_p;
      acl_ea_entry *ext_ent_p;

      *size = sizeof(acl_ea_header) + acl_obj_p->aused * sizeof(acl_ea_entry);
      ext_header_p = (acl_ea_header *)malloc(*size);
      if (!ext_header_p)
            return NULL;

      ext_header_p->a_version = cpu_to_le32(ACL_EA_VERSION);
      ext_ent_p = (acl_ea_entry *)(ext_header_p+1);
      FOREACH_ACL_ENTRY(entry_obj_p, acl_obj_p) {
            ext_ent_p->e_tag   = cpu_to_le16(entry_obj_p->etag);
            ext_ent_p->e_perm  = cpu_to_le16(entry_obj_p->eperm.sperm);

            switch(entry_obj_p->etag) {
                  case ACL_USER:
                  case ACL_GROUP:
                        ext_ent_p->e_id =
                              cpu_to_le32(entry_obj_p->eid.qid);
                        break;

                  default:
                        ext_ent_p->e_id = ACL_UNDEFINED_ID;
                        break;
            }
            ext_ent_p++;
      }
      return (char *)ext_header_p;
}


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