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
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
|
/* Translator for S_IFLNK nodes
Copyright (C) 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 <hurd.h>
#include <stdio.h>
#include <hurd/fsys.h>
#include <fcntl.h>
#include "fsys_S.h"
mach_port_t realnode;
/* We return this for O_NOLINK lookups */
mach_port_t realnodenoauth;
/* We return this for non O_NOLINK lookups */
char *linktarget;
extern int fsys_server (mach_msg_header_t *, mach_msg_header_t *);
int
main (int argc, char **argv)
{
mach_port_t bootstrap;
mach_port_t control;
error_t error;
task_get_bootstrap_port (mach_task_self (), &bootstrap);
if (bootstrap == MACH_PORT_NULL)
{
fprintf (stderr, "%s must be started as a translator\n", argv[0]);
exit (1);
}
if (argc != 2)
{
fprintf (stderr, "Usage: %s link-target\n", argv[0]);
exit (1);
}
linktarget = argv[1];
/* Reply to our parent */
mach_port_allocate (mach_task_self (), MACH_PORT_RIGHT_RECEIVE, &control);
error = fsys_startup (bootstrap, control,
MACH_MSG_TYPE_MAKE_SEND, &realnode);
if (error)
{
perror ("Starting up translator");
exit (1);
}
io_restrict_auth (realnode, &realnodenoauth, 0, 0, 0, 0);
mach_port_deallocate (mach_task_self (), realnode);
/* Launch */
while (1)
{
/* The timeout here is 10 minutes */
error = mach_msg_server_timeout (fsys_server, 0, control,
MACH_RCV_TIMEOUT, 1000 * 60 * 10);
if (error == MACH_RCV_TIMED_OUT)
exit (0);
}
}
error_t
S_fsys_getroot (mach_port_t fsys_t,
mach_port_t dotdotnode,
uid_t *uids,
u_int nuids,
uid_t *gids,
u_int ngids,
int flags,
retry_type *do_retry,
char *retry_name,
mach_port_t *ret,
mach_msg_type_name_t *rettype)
{
if (flags & O_NOLINK)
{
/* Return our underlying node. */
*ret = realnodenoauth;
*rettype = MACH_MSG_TYPE_COPY_SEND;
*do_retry = FS_RETRY_REAUTH;
retry_name[0] = '\0';
return 0;
}
else
{
/* Return telling the user to follow the link */
strcpy (retry_name, linktarget);
if (linktarget[0] == '/')
{
*do_retry = FS_RETRY_MAGICAL;
*ret = MACH_PORT_NULL;
*rettype = MACH_MSG_TYPE_COPY_SEND;
}
else
{
*do_retry = FS_RETRY_REAUTH;
*ret = dotdotnode;
*rettype = MACH_MSG_TYPE_MOVE_SEND;
}
}
return 0;
}
error_t
S_fsys_startup (mach_port_t bootstrap,
mach_port_t control,
mach_port_t *real,
mach_msg_type_name_t *realtype)
{
return EOPNOTSUPP;
}
error_t
S_fsys_goaway (mach_port_t control,
int flags)
{
exit (0);
}
error_t
S_fsys_syncfs (mach_port_t control,
int wait,
int recurse)
{
return 0;
}
error_t
S_fsys_set_options (mach_port_t control,
char *data, mach_msg_type_number_t len,
int do_children)
{
return EOPNOTSUPP;
}
error_t
S_fsys_getfile (mach_port_t control,
uid_t *uids,
u_int nuids,
uid_t *gids,
u_int ngids,
char *handle,
u_int handllen,
mach_port_t *pt,
mach_msg_type_name_t *pttype)
{
return EOPNOTSUPP;
}
error_t
S_fsys_getpriv (mach_port_t control,
mach_port_t *hostpriv,
mach_port_t *devmaster,
task_t *fstask)
{
return EOPNOTSUPP;
}
error_t
S_fsys_init (mach_port_t control,
mach_port_t reply,
mach_msg_type_name_t replytype,
mach_port_t proc,
auth_t auth)
{
return EOPNOTSUPP;
}
error_t
S_fsys_forward (mach_port_t server, mach_port_t requestor,
char *argz, size_t argz_len)
{
return EOPNOTSUPP;
}
|
