qapi2texi: Fix up output around #optional
[qemu.git] / chardev / char-pipe.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 "qapi/error.h"
26 #include "sysemu/char.h"
27
28 #ifdef _WIN32
29 #include "char-win.h"
30 #else
31 #include "char-fd.h"
32 #endif
33
34 #ifdef _WIN32
35 #define MAXCONNECT 1
36 #define NTIMEOUT 5000
37
38 static int win_chr_pipe_init(Chardev *chr, const char *filename,
39 Error **errp)
40 {
41 WinChardev *s = WIN_CHARDEV(chr);
42 OVERLAPPED ov;
43 int ret;
44 DWORD size;
45 char *openname;
46
47 s->fpipe = TRUE;
48
49 s->hsend = CreateEvent(NULL, TRUE, FALSE, NULL);
50 if (!s->hsend) {
51 error_setg(errp, "Failed CreateEvent");
52 goto fail;
53 }
54 s->hrecv = CreateEvent(NULL, TRUE, FALSE, NULL);
55 if (!s->hrecv) {
56 error_setg(errp, "Failed CreateEvent");
57 goto fail;
58 }
59
60 openname = g_strdup_printf("\\\\.\\pipe\\%s", filename);
61 s->hcom = CreateNamedPipe(openname,
62 PIPE_ACCESS_DUPLEX | FILE_FLAG_OVERLAPPED,
63 PIPE_TYPE_BYTE | PIPE_READMODE_BYTE |
64 PIPE_WAIT,
65 MAXCONNECT, NSENDBUF, NRECVBUF, NTIMEOUT, NULL);
66 g_free(openname);
67 if (s->hcom == INVALID_HANDLE_VALUE) {
68 error_setg(errp, "Failed CreateNamedPipe (%lu)", GetLastError());
69 s->hcom = NULL;
70 goto fail;
71 }
72
73 ZeroMemory(&ov, sizeof(ov));
74 ov.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
75 ret = ConnectNamedPipe(s->hcom, &ov);
76 if (ret) {
77 error_setg(errp, "Failed ConnectNamedPipe");
78 goto fail;
79 }
80
81 ret = GetOverlappedResult(s->hcom, &ov, &size, TRUE);
82 if (!ret) {
83 error_setg(errp, "Failed GetOverlappedResult");
84 if (ov.hEvent) {
85 CloseHandle(ov.hEvent);
86 ov.hEvent = NULL;
87 }
88 goto fail;
89 }
90
91 if (ov.hEvent) {
92 CloseHandle(ov.hEvent);
93 ov.hEvent = NULL;
94 }
95 qemu_add_polling_cb(win_chr_pipe_poll, chr);
96 return 0;
97
98 fail:
99 return -1;
100 }
101
102 static void qemu_chr_open_pipe(Chardev *chr,
103 ChardevBackend *backend,
104 bool *be_opened,
105 Error **errp)
106 {
107 ChardevHostdev *opts = backend->u.pipe.data;
108 const char *filename = opts->device;
109
110 if (win_chr_pipe_init(chr, filename, errp) < 0) {
111 return;
112 }
113 }
114
115 #else
116
117 static void qemu_chr_open_pipe(Chardev *chr,
118 ChardevBackend *backend,
119 bool *be_opened,
120 Error **errp)
121 {
122 ChardevHostdev *opts = backend->u.pipe.data;
123 int fd_in, fd_out;
124 char *filename_in;
125 char *filename_out;
126 const char *filename = opts->device;
127
128 filename_in = g_strdup_printf("%s.in", filename);
129 filename_out = g_strdup_printf("%s.out", filename);
130 TFR(fd_in = qemu_open(filename_in, O_RDWR | O_BINARY));
131 TFR(fd_out = qemu_open(filename_out, O_RDWR | O_BINARY));
132 g_free(filename_in);
133 g_free(filename_out);
134 if (fd_in < 0 || fd_out < 0) {
135 if (fd_in >= 0) {
136 close(fd_in);
137 }
138 if (fd_out >= 0) {
139 close(fd_out);
140 }
141 TFR(fd_in = fd_out = qemu_open(filename, O_RDWR | O_BINARY));
142 if (fd_in < 0) {
143 error_setg_file_open(errp, errno, filename);
144 return;
145 }
146 }
147 qemu_chr_open_fd(chr, fd_in, fd_out);
148 }
149
150 #endif /* !_WIN32 */
151
152 static void qemu_chr_parse_pipe(QemuOpts *opts, ChardevBackend *backend,
153 Error **errp)
154 {
155 const char *device = qemu_opt_get(opts, "path");
156 ChardevHostdev *dev;
157
158 if (device == NULL) {
159 error_setg(errp, "chardev: pipe: no device path given");
160 return;
161 }
162 backend->type = CHARDEV_BACKEND_KIND_PIPE;
163 dev = backend->u.pipe.data = g_new0(ChardevHostdev, 1);
164 qemu_chr_parse_common(opts, qapi_ChardevHostdev_base(dev));
165 dev->device = g_strdup(device);
166 }
167
168 static void char_pipe_class_init(ObjectClass *oc, void *data)
169 {
170 ChardevClass *cc = CHARDEV_CLASS(oc);
171
172 cc->parse = qemu_chr_parse_pipe;
173 cc->open = qemu_chr_open_pipe;
174 }
175
176 static const TypeInfo char_pipe_type_info = {
177 .name = TYPE_CHARDEV_PIPE,
178 #ifdef _WIN32
179 .parent = TYPE_CHARDEV_WIN,
180 #else
181 .parent = TYPE_CHARDEV_FD,
182 #endif
183 .class_init = char_pipe_class_init,
184 };
185
186 static void register_types(void)
187 {
188 type_register_static(&char_pipe_type_info);
189 }
190
191 type_init(register_types);