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
|
/*
* Server-side pipe management
*
* Copyright (C) 1998 Alexandre Julliard
*/
#include "config.h"
#include <assert.h>
#include <fcntl.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#ifdef HAVE_SYS_ERRNO_H
#include <sys/errno.h>
#endif
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/types.h>
#include <time.h>
#include <unistd.h>
#include "winerror.h"
#include "winbase.h"
#include "handle.h"
#include "thread.h"
#include "request.h"
enum side { READ_SIDE, WRITE_SIDE };
struct pipe
{
struct object obj; /* object header */
struct pipe *other; /* the pipe other end */
enum side side; /* which side of the pipe is this */
};
static void pipe_dump( struct object *obj, int verbose );
static int pipe_get_poll_events( struct object *obj );
static int pipe_get_read_fd( struct object *obj );
static int pipe_get_write_fd( struct object *obj );
static int pipe_get_info( struct object *obj, struct get_file_info_request *req );
static void pipe_destroy( struct object *obj );
static const struct object_ops pipe_ops =
{
sizeof(struct pipe), /* size */
pipe_dump, /* dump */
default_poll_add_queue, /* add_queue */
default_poll_remove_queue, /* remove_queue */
default_poll_signaled, /* signaled */
no_satisfied, /* satisfied */
pipe_get_poll_events, /* get_poll_events */
default_poll_event, /* poll_event */
pipe_get_read_fd, /* get_read_fd */
pipe_get_write_fd, /* get_write_fd */
no_flush, /* flush */
pipe_get_info, /* get_file_info */
pipe_destroy /* destroy */
};
static struct pipe *create_pipe_side( int fd, int side )
{
struct pipe *pipe;
if ((pipe = alloc_object( &pipe_ops, fd )))
{
pipe->other = NULL;
pipe->side = side;
}
return pipe;
}
static int create_pipe( struct object *obj[2] )
{
struct pipe *read_pipe;
struct pipe *write_pipe;
int fd[2];
if (pipe( fd ) == -1)
{
file_set_error();
return 0;
}
if ((read_pipe = create_pipe_side( fd[0], READ_SIDE )))
{
if ((write_pipe = create_pipe_side( fd[1], WRITE_SIDE )))
{
write_pipe->other = read_pipe;
read_pipe->other = write_pipe;
obj[0] = &read_pipe->obj;
obj[1] = &write_pipe->obj;
return 1;
}
release_object( read_pipe );
}
else close( fd[1] );
return 0;
}
static void pipe_dump( struct object *obj, int verbose )
{
struct pipe *pipe = (struct pipe *)obj;
assert( obj->ops == &pipe_ops );
fprintf( stderr, "Pipe %s-side fd=%d\n",
(pipe->side == READ_SIDE) ? "read" : "write", pipe->obj.fd );
}
static int pipe_get_poll_events( struct object *obj )
{
struct pipe *pipe = (struct pipe *)obj;
assert( obj->ops == &pipe_ops );
return (pipe->side == READ_SIDE) ? POLLIN : POLLOUT;
}
static int pipe_get_read_fd( struct object *obj )
{
struct pipe *pipe = (struct pipe *)obj;
assert( obj->ops == &pipe_ops );
if (!pipe->other)
{
set_error( ERROR_BROKEN_PIPE );
return -1;
}
if (pipe->side != READ_SIDE) /* FIXME: should not be necessary */
{
set_error( ERROR_ACCESS_DENIED );
return -1;
}
return dup( pipe->obj.fd );
}
static int pipe_get_write_fd( struct object *obj )
{
struct pipe *pipe = (struct pipe *)obj;
assert( obj->ops == &pipe_ops );
if (!pipe->other)
{
set_error( ERROR_BROKEN_PIPE );
return -1;
}
if (pipe->side != WRITE_SIDE) /* FIXME: should not be necessary */
{
set_error( ERROR_ACCESS_DENIED );
return -1;
}
return dup( pipe->obj.fd );
}
static int pipe_get_info( struct object *obj, struct get_file_info_request *req )
{
req->type = FILE_TYPE_PIPE;
req->attr = 0;
req->access_time = 0;
req->write_time = 0;
req->size_high = 0;
req->size_low = 0;
req->links = 0;
req->index_high = 0;
req->index_low = 0;
req->serial = 0;
return 1;
}
static void pipe_destroy( struct object *obj )
{
struct pipe *pipe = (struct pipe *)obj;
assert( obj->ops == &pipe_ops );
if (pipe->other) pipe->other->other = NULL;
}
/* create an anonymous pipe */
DECL_HANDLER(create_pipe)
{
struct object *obj[2];
int hread = -1, hwrite = -1;
if (create_pipe( obj ))
{
hread = alloc_handle( current->process, obj[0],
STANDARD_RIGHTS_REQUIRED|SYNCHRONIZE|GENERIC_READ,
req->inherit );
if (hread != -1)
{
hwrite = alloc_handle( current->process, obj[1],
STANDARD_RIGHTS_REQUIRED|SYNCHRONIZE|GENERIC_WRITE,
req->inherit );
if (hwrite == -1)
close_handle( current->process, hread );
}
release_object( obj[0] );
release_object( obj[1] );
}
req->handle_read = hread;
req->handle_write = hwrite;
}
|
