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
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
|
/*
Copyright (C) 1993, 1994, 1995 Free Software Foundation
This file is part of the GNU Hurd.
The GNU Hurd 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.
The GNU Hurd 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 the GNU Hurd; see the file COPYING. If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
/* Written by Michael I. Bushnell. */
#include "priv.h"
#include "io_S.h"
#include <string.h>
kern_return_t
trivfs_S_io_duplicate (struct trivfs_protid *cred,
mach_port_t reply,
mach_msg_type_name_t replytype,
mach_port_t *newport,
mach_msg_type_name_t *newporttype)
{
struct trivfs_protid *newcred;
if (!cred)
return EOPNOTSUPP;
newcred = ports_allocate_port (sizeof (struct trivfs_protid), cred->pi.type);
newcred->realnode = cred->realnode;
newcred->isroot = cred->isroot;
mutex_lock (&cred->po->cntl->lock);
newcred->po = cred->po;
newcred->po->refcnt++;
mutex_unlock (&cred->po->cntl->lock);
newcred->uids = malloc (cred->nuids * sizeof (uid_t));
newcred->gids = malloc (cred->ngids * sizeof (gid_t));
bcopy (cred->uids, newcred->uids, cred->nuids * sizeof (uid_t));
bcopy (cred->gids, newcred->gids, cred->ngids * sizeof (uid_t));
newcred->nuids = cred->nuids;
newcred->ngids = cred->ngids;
mach_port_mod_refs (mach_task_self (), newcred->realnode,
MACH_PORT_RIGHT_SEND, 1);
newcred->hook = cred->hook;
if (trivfs_protid_create_hook)
(*trivfs_protid_create_hook) (newcred);
*newport = ports_get_right (newcred);
*newporttype = MACH_MSG_TYPE_MAKE_SEND;
return 0;
}
|
