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
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
|
/*
Copyright (C) 1996,97,2001,02 Free Software Foundation, Inc.
Written by Michael I. Bushnell, p/BSG.
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 this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA. */
#include "netfs.h"
#include "fsys_S.h"
#include "misc.h"
#include "callbacks.h"
#include <fcntl.h>
#include <hurd/fshelp.h>
kern_return_t
netfs_S_fsys_getroot (struct netfs_control *pt,
mach_port_t reply,
mach_msg_type_name_t reply_type,
mach_port_t dotdot,
const id_t *uids, mach_msg_type_number_t nuids,
const id_t *gids, mach_msg_type_number_t ngids,
int flags,
retry_type *do_retry,
string_t retry_name,
mach_port_t *retry_port,
mach_msg_type_name_t *retry_port_type)
{
struct iouser *cred;
error_t err;
struct protid *newpi;
mode_t type;
struct peropen peropen_context =
{
root_parent: dotdot,
path: NULL,
};
if (!pt)
return EOPNOTSUPP;
err = iohelp_create_complex_iouser (&cred, uids, nuids, gids, ngids);
if (err)
return err;
flags &= O_HURD;
pthread_mutex_lock (&netfs_root_node->lock);
err = netfs_validate_stat (netfs_root_node, cred);
if (err)
goto out;
type = netfs_root_node->nn_stat.st_mode & S_IFMT;
if (((netfs_root_node->nn_stat.st_mode & S_IPTRANS)
|| fshelp_translated (&netfs_root_node->transbox))
&& !(flags & O_NOTRANS))
{
struct fshelp_stat_cookie2 cookie = {
.next = &peropen_context,
};
err = fshelp_fetch_root (&netfs_root_node->transbox,
&cookie, dotdot, cred, flags,
_netfs_translator_callback1,
_netfs_translator_callback2,
do_retry, retry_name, retry_port);
if (err != ENOENT)
{
pthread_mutex_unlock (&netfs_root_node->lock);
iohelp_free_iouser (cred);
if (!err)
*retry_port_type = MACH_MSG_TYPE_MOVE_SEND;
return err;
}
/* ENOENT means translator has vanished inside fshelp_fetch_root. */
err = 0;
}
if (type == S_IFLNK && !(flags & (O_NOLINK | O_NOTRANS)))
{
char pathbuf[netfs_root_node->nn_stat.st_size + 1];
err = netfs_attempt_readlink (cred, netfs_root_node, pathbuf);
if (err)
goto out;
pthread_mutex_unlock (&netfs_root_node->lock);
iohelp_free_iouser (cred);
if (pathbuf[0] == '/')
{
*do_retry = FS_RETRY_MAGICAL;
*retry_port = MACH_PORT_NULL;
*retry_port_type = MACH_MSG_TYPE_COPY_SEND;
strcpy (retry_name, pathbuf);
mach_port_deallocate (mach_task_self (), dotdot);
return 0;
}
else
{
*do_retry = FS_RETRY_REAUTH;
*retry_port = dotdot;
*retry_port_type = MACH_MSG_TYPE_MOVE_SEND;
strcpy (retry_name, pathbuf);
return 0;
}
}
if ((type == S_IFSOCK || type == S_IFBLK || type == S_IFCHR
|| type == S_IFIFO) && (flags & (O_READ|O_WRITE|O_EXEC)))
{
err = EOPNOTSUPP;
goto out;
}
err = netfs_check_open_permissions (cred, netfs_root_node, flags, 0);
if (err)
goto out;
flags &= ~OPENONLY_STATE_MODES;
newpi = netfs_make_protid (netfs_make_peropen (netfs_root_node, flags,
&peropen_context),
cred);
mach_port_deallocate (mach_task_self (), dotdot);
*do_retry = FS_RETRY_NORMAL;
*retry_port = ports_get_right (newpi);
*retry_port_type = MACH_MSG_TYPE_MAKE_SEND;
retry_name[0] = '\0';
ports_port_deref (newpi);
out:
if (err)
iohelp_free_iouser (cred);
pthread_mutex_unlock (&netfs_root_node->lock);
return err;
}
|
