/*

  File: sequence.h

  (Linux Access Control List Management)

  Copyright (C) 1999 by 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 Lesser General Public

  License as published by the Free Software Foundation; either

  version 2.1 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

  Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser 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.

*/

#ifndef __SEQUENCE_H

#define __SEQUENCE_H

#include <sys/acl.h>

#ifdef __cplusplus

extern "C" {

#endif

typedef unsigned int cmd_tag_t;

struct cmd_obj {

	cmd_tag_t		c_cmd;

	acl_type_t		c_type;

	acl_tag_t		c_tag;

	uid_t			c_id;

	mode_t			c_perm;

	struct cmd_obj		*c_next;

};

typedef struct cmd_obj *cmd_t;

struct seq_obj {

	cmd_t			s_first;

	cmd_t			s_last;

};

typedef struct seq_obj *seq_t;

/* command types */

#define CMD_ENTRY_REPLACE	(0)

#define CMD_REMOVE_ENTRY	(3)

#define CMD_REMOVE_EXTENDED_ACL	(4)

#define CMD_REMOVE_ACL		(5)

/* constants for permission specifiers */

#define CMD_PERM_READ		(4)

#define CMD_PERM_WRITE		(2)

#define CMD_PERM_EXECUTE	(1)

#define CMD_PERM_COND_EXECUTE	(8)

/* iteration over command sequence */

#define SEQ_FIRST_CMD		(0)

#define SEQ_NEXT_CMD		(1)

/* command sequence manipulation */

cmd_t

cmd_init(

	void);

void

cmd_free(

	cmd_t cmd);

seq_t

seq_init(

	void);

int

seq_free(

	seq_t seq);

int

seq_empty(

	seq_t seq);

int

seq_append(

	seq_t seq,

	cmd_t cmd);

int

seq_append_cmd(

	seq_t seq,

	cmd_tag_t cmd,

	acl_type_t type);

int

seq_get_cmd(

	seq_t seq,

	int which,

	cmd_t *cmd);

int

seq_delete_cmd(

	seq_t seq,

	cmd_t cmd);

#ifdef __cplusplus

}

#endif

#endif  /* __SEQUENCE_H */