tests: Add a tester for HMP commands
[qemu.git] / chardev / char-null.c
1 /*
2 * QEMU System Emulator
3 *
4 * Copyright (c) 2003-2008 Fabrice Bellard
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 * THE SOFTWARE.
23 */
24 #include "qemu/osdep.h"
25 #include "sysemu/char.h"
26
27 static void null_chr_open(Chardev *chr,
28 ChardevBackend *backend,
29 bool *be_opened,
30 Error **errp)
31 {
32 *be_opened = false;
33 }
34
35 static void char_null_class_init(ObjectClass *oc, void *data)
36 {
37 ChardevClass *cc = CHARDEV_CLASS(oc);
38
39 cc->open = null_chr_open;
40 }
41
42 static const TypeInfo char_null_type_info = {
43 .name = TYPE_CHARDEV_NULL,
44 .parent = TYPE_CHARDEV,
45 .instance_size = sizeof(Chardev),
46 .class_init = char_null_class_init,
47 };
48
49 static void register_types(void)
50 {
51 type_register_static(&char_null_type_info);
52 }
53
54 type_init(register_types);