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
|
/* A really stupid translator allowing a user to get a device port
Copyright (C) 1996 Free Software Foundation, Inc.
Written by Miles Bader <miles@gnu.ai.mit.edu>
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 <stdio.h>
#include <unistd.h>
#include <error.h>
#include <string.h>
#include <hurd.h>
#include <hurd/ports.h>
#include <hurd/trivfs.h>
#include <hurd/fsys.h>
#include <device/device.h>
static mach_port_t device_master = MACH_PORT_NULL;
static char *device_name = 0;
struct port_class *trivfs_protid_portclasses[1];
struct port_class *trivfs_cntl_portclasses[1];
int trivfs_protid_nportclasses = 1;
int trivfs_cntl_nportclasses = 1;
void
main (int argc, char **argv)
{
error_t err;
mach_port_t bootstrap;
struct port_class *control_class;
struct port_class *node_class;
struct port_bucket *port_bucket;
control_class = ports_create_class (trivfs_clean_cntl, 0);
node_class = ports_create_class (trivfs_clean_protid, 0);
port_bucket = ports_create_bucket ();
trivfs_protid_portclasses[0] = node_class;
trivfs_cntl_portclasses[0] = control_class;
if (argc != 2)
{
fprintf (stderr, "Usage: %s DEVICE-NAME", program_invocation_name);
exit(1);
}
device_name = argv[1];
task_get_bootstrap_port (mach_task_self (), &bootstrap);
if (bootstrap == MACH_PORT_NULL)
error (1, 0, "must be started as a translator");
err = get_privileged_ports (0, &device_master);
if (err)
error (2, err, "Can't get device master port");
/* Reply to our parent */
err = trivfs_startup (bootstrap, 0, control_class, port_bucket,
node_class, port_bucket, NULL);
if (err)
error (3, err, "Contacting parent");
/* Launch. */
ports_manage_port_operations_one_thread (port_bucket, trivfs_demuxer, 0);
exit(0);
}
/* Trivfs hooks */
int trivfs_fstype = FSTYPE_DEV;
int trivfs_fsid = 0;
int trivfs_support_read = 0;
int trivfs_support_write = 0;
int trivfs_support_exec = 0;
int trivfs_allow_open = 0;
void
trivfs_modify_stat (struct trivfs_protid *cred, struct stat *st)
{
st->st_size = 0;
st->st_blocks = 0;
st->st_mode &= ~S_IFMT;
st->st_mode |= S_IFCHR;
}
error_t
trivfs_goaway (struct trivfs_control *fsys, int flags)
{
exit (0);
}
error_t
trivfs_S_file_get_storage_info (struct trivfs_protid *cred,
mach_port_t reply,
mach_msg_type_name_t reply_type,
mach_port_t **ports,
mach_msg_type_name_t *ports_type,
mach_msg_type_number_t *num_ports,
int **ints, mach_msg_type_number_t *num_ints,
off_t **offsets,
mach_msg_type_number_t *num_offsets,
char **data, mach_msg_type_number_t *data_len)
{
error_t err = 0;
if (!cred)
err = EOPNOTSUPP;
else
{
/* True when we've allocated memory for the corresponding vector. */
int al_ports = 0, al_ints = 0, al_offsets = 0, al_data = 0;
size_t name_len = strlen (device_name) + 1;
#define ENSURE_MEM(v, vl, alp, num) \
if (!err && *vl < num) \
{ \
err = vm_allocate (mach_task_self (), \
(vm_address_t *)v, num * sizeof (**v), 1); \
if (! err) \
{ \
*vl = num; \
alp = 1; \
} \
}
ENSURE_MEM (ports, num_ports, al_ports, 1);
ENSURE_MEM (ints, num_ints, al_ints, 6);
ENSURE_MEM (offsets, num_offsets, al_offsets, 0);
ENSURE_MEM (data, data_len, al_data, name_len);
if (! err)
err = device_open (device_master, 0, device_name, *ports);
if (! err)
{
(*ints)[0] = STORAGE_DEVICE; /* type */
(*ints)[1] = 0; /* flags */
(*ints)[2] = 0; /* block_size */
(*ints)[3] = 0; /* num_runs */
(*ints)[4] = name_len; /* name_len */
(*ints)[5] = 0; /* misc_len */
*num_ints = 6;
strcpy (*data, device_name);
*data_len = name_len;
*num_ports = 1;
*ports_type = MACH_MSG_TYPE_MOVE_SEND;
*num_offsets = 0;
}
else
/* Some memory allocation failed (not bloody likely). */
{
#define DISCARD_MEM(v, vl, alp) \
if (alp) \
vm_deallocate (mach_task_self (), (vm_address_t)*v, *vl * sizeof (**v));
DISCARD_MEM (ports, num_ports, al_ports);
DISCARD_MEM (ints, num_ints, al_ints);
DISCARD_MEM (offsets, num_offsets, al_offsets);
DISCARD_MEM (data, data_len, al_data);
}
}
return err;
}
|
