1  /*
       2    File: sequence.h
       3    (Linux Access Control List Management)
       4  
       5    Copyright (C) 1999 by Andreas Gruenbacher
       6    <a.gruenbacher@computer.org>
       7   	
       8    This program is free software; you can redistribute it and/or
       9    modify it under the terms of the GNU Lesser General Public
      10    License as published by the Free Software Foundation; either
      11    version 2.1 of the License, or (at your option) any later version.
      12  
      13    This program is distributed in the hope that it will be useful,
      14    but WITHOUT ANY WARRANTY; without even the implied warranty of
      15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      16    Lesser General Public License for more details.
      17  
      18    You should have received a copy of the GNU Lesser General Public
      19    License along with this library; if not, write to the Free Software
      20    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
      21  */
      22  
      23  
      24  #ifndef __SEQUENCE_H
      25  #define __SEQUENCE_H
      26  
      27  
      28  #include <sys/acl.h>
      29  
      30  
      31  #ifdef __cplusplus
      32  extern "C" {
      33  #endif
      34  
      35  
      36  typedef unsigned int cmd_tag_t;
      37  
      38  struct cmd_obj {
      39  	cmd_tag_t		c_cmd;
      40  	acl_type_t		c_type;
      41  	acl_tag_t		c_tag;
      42  	uid_t			c_id;
      43  	mode_t			c_perm;
      44  	struct cmd_obj		*c_next;
      45  };
      46  
      47  typedef struct cmd_obj *cmd_t;
      48  
      49  struct seq_obj {
      50  	cmd_t			s_first;
      51  	cmd_t			s_last;
      52  };
      53  
      54  typedef struct seq_obj *seq_t;
      55  
      56  /* command types */
      57  #define CMD_ENTRY_REPLACE	(0)
      58  #define CMD_REMOVE_ENTRY	(3)
      59  #define CMD_REMOVE_EXTENDED_ACL	(4)
      60  #define CMD_REMOVE_ACL		(5)
      61  
      62  /* constants for permission specifiers */
      63  #define CMD_PERM_READ		(4)
      64  #define CMD_PERM_WRITE		(2)
      65  #define CMD_PERM_EXECUTE	(1)
      66  #define CMD_PERM_COND_EXECUTE	(8)
      67  
      68  /* iteration over command sequence */
      69  #define SEQ_FIRST_CMD		(0)
      70  #define SEQ_NEXT_CMD		(1)
      71  
      72  /* command sequence manipulation */
      73  
      74  cmd_t
      75  cmd_init(
      76  	void);
      77  void
      78  cmd_free(
      79  	cmd_t cmd);
      80  seq_t
      81  seq_init(
      82  	void);
      83  int
      84  seq_free(
      85  	seq_t seq);
      86  int
      87  seq_empty(
      88  	seq_t seq);
      89  int
      90  seq_append(
      91  	seq_t seq,
      92  	cmd_t cmd);
      93  int
      94  seq_append_cmd(
      95  	seq_t seq,
      96  	cmd_tag_t cmd,
      97  	acl_type_t type);
      98  int
      99  seq_get_cmd(
     100  	seq_t seq,
     101  	int which,
     102  	cmd_t *cmd);
     103  int
     104  seq_delete_cmd(
     105  	seq_t seq,
     106  	cmd_t cmd);
     107  
     108  
     109  #ifdef __cplusplus
     110  }
     111  #endif
     112  
     113  
     114  #endif  /* __SEQUENCE_H */
     115