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
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
|
/*
Copyright (C) 1994, 1995, 1996 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 "io_S.h"
/* Implement io_reathenticate as described in <hurd/io.defs>. */
kern_return_t
diskfs_S_io_reauthenticate (struct protid *cred,
mach_port_t rend_port)
{
struct protid *newcred;
uid_t gubuf[20], ggbuf[20], aubuf[20], agbuf[20];
uid_t *gen_uids, *gen_gids, *aux_uids, *aux_gids;
u_int genuidlen, gengidlen, auxuidlen, auxgidlen;
error_t err;
mach_port_t newright;
if (cred == 0)
return EOPNOTSUPP;
genuidlen = gengidlen = auxuidlen = auxgidlen = 20;
gen_uids = gubuf;
gen_gids = ggbuf;
aux_uids = aubuf;
aux_gids = agbuf;
/* This routine must carefully ignore EINTR because we
are a simpleroutine, so callers won't know to restart. */
mutex_lock (&cred->po->np->lock);
do
err = diskfs_start_protid (cred->po, &newcred);
while (err == EINTR);
if (err)
{
mutex_unlock (&cred->po->np->lock);
return err;
}
newright = ports_get_right (newcred);
err = mach_port_insert_right (mach_task_self (), newright, newright,
MACH_MSG_TYPE_MAKE_SEND);
assert_perror (err);
do
err = auth_server_authenticate (diskfs_auth_server_port,
rend_port,
MACH_MSG_TYPE_COPY_SEND,
newright,
MACH_MSG_TYPE_COPY_SEND,
&gen_uids, &genuidlen,
&aux_uids, &auxuidlen,
&gen_gids, &gengidlen,
&aux_gids, &auxgidlen);
while (err == EINTR);
mach_port_deallocate (mach_task_self (), rend_port);
mach_port_deallocate (mach_task_self (), newright);
if (err)
diskfs_finish_protid (newcred, 0, 0, 0, 0);
else
diskfs_finish_protid (newcred, gen_uids, genuidlen, gen_gids, gengidlen);
mutex_unlock (&cred->po->np->lock);
ports_port_deref (newcred);
if (gubuf != gen_uids)
vm_deallocate (mach_task_self (), (u_int) gen_uids,
genuidlen * sizeof (uid_t));
if (ggbuf != gen_gids)
vm_deallocate (mach_task_self (), (u_int) gen_gids,
gengidlen * sizeof (uid_t));
if (aubuf != aux_uids)
vm_deallocate (mach_task_self (), (u_int) aux_uids,
auxuidlen * sizeof (uid_t));
if (agbuf != aux_gids)
vm_deallocate (mach_task_self (), (u_int) aux_gids,
auxgidlen * sizeof (uid_t));
return 0;
}
|
