libdiskfs/file-getcontrol.c


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41

/* libdiskfs implementation of fs.defs:file_getcontrol.c
   Copyright (C) 1992, 1993, 1994 Free Software Foundation

   This program is free software; you can redistribute it and/or
   modify it under the terms of the GNU General Public License as
   published by the Free Software Foundation; either version 2, 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
   General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */

#include "priv.h"
#include "fs_S.h"

/* Implement file_getcontrol as described in <hurd/fs.defs>. */
kern_return_t
diskfs_S_file_getcontrol (struct protid *cred,
			  mach_port_t *control,
			  mach_msg_type_name_t *controltype)
{
  int error = 0;;

  if (!cred)
    return EOPNOTSUPP;
  
  if (!diskfs_isuid (0, cred))
    error = EPERM;
  else
    {
      *control = ports_get_right (diskfs_control_port);
      *controltype = MACH_MSG_TYPE_MAKE_SEND;
    }

  return error;
}