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
192
193
194
195
196
197
198
199
200
201
202
|
#include <config.h>
#include <unistd.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <unistd.h>
#include <fcntl.h>
#include <glib.h>
#include <glib-object.h>
#include <glib/gi18n.h>
#include <gvfsreadchannel.h>
#include <gvfsdaemonprotocol.h>
#include <gvfsdaemonutils.h>
#include <gvfsjobread.h>
#include <gvfsjobseekread.h>
#include <gvfsjobcloseread.h>
struct _GVfsReadChannel
{
GVfsChannel parent_instance;
int seek_generation;
};
G_DEFINE_TYPE (GVfsReadChannel, g_vfs_read_channel, G_VFS_TYPE_CHANNEL)
static GVfsJob *read_channel_close (GVfsChannel *channel);
static GVfsJob *read_channel_handle_request (GVfsChannel *channel,
guint32 command,
guint32 seq_nr,
guint32 arg1,
guint32 arg2,
gpointer data,
gsize data_len,
GError **error);
static void
g_vfs_read_channel_finalize (GObject *object)
{
GVfsReadChannel *read_channel;
read_channel = G_VFS_READ_CHANNEL (object);
if (G_OBJECT_CLASS (g_vfs_read_channel_parent_class)->finalize)
(*G_OBJECT_CLASS (g_vfs_read_channel_parent_class)->finalize) (object);
}
static void
g_vfs_read_channel_class_init (GVfsReadChannelClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GVfsChannelClass *channel_class = G_VFS_CHANNEL_CLASS (klass);
gobject_class->finalize = g_vfs_read_channel_finalize;
channel_class->close = read_channel_close;
channel_class->handle_request = read_channel_handle_request;
}
static void
g_vfs_read_channel_init (GVfsReadChannel *channel)
{
}
static GVfsJob *
read_channel_close (GVfsChannel *channel)
{
return g_vfs_job_close_read_new (G_VFS_READ_CHANNEL (channel),
g_vfs_channel_get_backend_handle (channel),
g_vfs_channel_get_backend (channel));
}
static GVfsJob *
read_channel_handle_request (GVfsChannel *channel,
guint32 command,
guint32 seq_nr,
guint32 arg1,
guint32 arg2,
gpointer data,
gsize data_len,
GError **error)
{
GVfsJob *job;
GSeekType seek_type;
GVfsBackendHandle backend_handle;
GVfsBackend *backend;
GVfsReadChannel *read_channel;
read_channel = G_VFS_READ_CHANNEL (channel);
backend_handle = g_vfs_channel_get_backend_handle (channel);
backend = g_vfs_channel_get_backend (channel);
job = NULL;
switch (command)
{
case G_VFS_DAEMON_SOCKET_PROTOCOL_REQUEST_READ:
job = g_vfs_job_read_new (read_channel,
backend_handle,
arg1,
backend);
break;
case G_VFS_DAEMON_SOCKET_PROTOCOL_REQUEST_CLOSE:
job = g_vfs_job_close_read_new (read_channel,
backend_handle,
backend);
break;
case G_VFS_DAEMON_SOCKET_PROTOCOL_REQUEST_SEEK_CUR:
case G_VFS_DAEMON_SOCKET_PROTOCOL_REQUEST_SEEK_END:
case G_VFS_DAEMON_SOCKET_PROTOCOL_REQUEST_SEEK_SET:
seek_type = G_SEEK_SET;
if (command == G_VFS_DAEMON_SOCKET_PROTOCOL_REQUEST_SEEK_END)
seek_type = G_SEEK_END;
else if (command == G_VFS_DAEMON_SOCKET_PROTOCOL_REQUEST_SEEK_CUR)
seek_type = G_SEEK_CUR;
read_channel->seek_generation++;
job = g_vfs_job_seek_read_new (read_channel,
backend_handle,
seek_type,
((goffset)arg1) | (((goffset)arg2) << 32),
backend);
break;
default:
g_set_error (error, G_IO_ERROR,
G_IO_ERROR_FAILED,
"Unknown stream command %d\n", command);
break;
}
/* Ownership was passed */
g_free (data);
return job;
}
/* Might be called on an i/o thread
*/
void
g_vfs_read_channel_send_seek_offset (GVfsReadChannel *read_channel,
goffset offset)
{
GVfsDaemonSocketProtocolReply reply;
GVfsChannel *channel;
channel = G_VFS_CHANNEL (read_channel);
reply.type = g_htonl (G_VFS_DAEMON_SOCKET_PROTOCOL_REPLY_SEEK_POS);
reply.seq_nr = g_htonl (g_vfs_channel_get_current_seq_nr (channel));
reply.arg1 = g_htonl (offset & 0xffffffff);
reply.arg2 = g_htonl (offset >> 32);
g_vfs_channel_send_reply (channel, &reply, NULL, 0);
}
/* Might be called on an i/o thread
*/
void
g_vfs_read_channel_send_closed (GVfsReadChannel *read_channel)
{
GVfsDaemonSocketProtocolReply reply;
GVfsChannel *channel;
channel = G_VFS_CHANNEL (read_channel);
reply.type = g_htonl (G_VFS_DAEMON_SOCKET_PROTOCOL_REPLY_CLOSED);
reply.seq_nr = g_htonl (g_vfs_channel_get_current_seq_nr (channel));
reply.arg1 = g_htonl (0);
reply.arg2 = g_htonl (0);
g_vfs_channel_send_reply (channel, &reply, NULL, 0);
}
/* Might be called on an i/o thread
*/
void
g_vfs_read_channel_send_data (GVfsReadChannel *read_channel,
char *buffer,
gsize count)
{
GVfsDaemonSocketProtocolReply reply;
GVfsChannel *channel;
channel = G_VFS_CHANNEL (read_channel);
reply.type = g_htonl (G_VFS_DAEMON_SOCKET_PROTOCOL_REPLY_DATA);
reply.seq_nr = g_htonl (g_vfs_channel_get_current_seq_nr (channel));
reply.arg1 = g_htonl (count);
reply.arg2 = g_htonl (read_channel->seek_generation);
g_vfs_channel_send_reply (channel, &reply, buffer, count);
}
GVfsReadChannel *
g_vfs_read_channel_new (GVfsBackend *backend)
{
return g_object_new (G_VFS_TYPE_READ_CHANNEL,
"backend", backend,
NULL);
}
|
